SAFE public projects git trees. - safe/jmp/linux-2.6/blob - drivers/platform/x86/thinkpad_acpi.c

   1 /*
   2  *  thinkpad_acpi.c - ThinkPad ACPI Extras
   3  *
   4  *
   5  *  Copyright (C) 2004-2005 Borislav Deianov <borislav@users.sf.net>
   6  *  Copyright (C) 2006-2009 Henrique de Moraes Holschuh <hmh@hmh.eng.br>
   7  *
   8  *  This program is free software; you can redistribute it and/or modify
   9  *  it under the terms of the GNU General Public License as published by
  10  *  the Free Software Foundation; either version 2 of the License, or
  11  *  (at your option) any later version.
  12  *
  13  *  This program is distributed in the hope that it will be useful,
  14  *  but WITHOUT ANY WARRANTY; without even the implied warranty of
  15  *  MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
  16  *  GNU General Public License for more details.
  17  *
  18  *  You should have received a copy of the GNU General Public License
  19  *  along with this program; if not, write to the Free Software
  20  *  Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA
  21  *  02110-1301, USA.
  22  */
  23
  24 #define TPACPI_VERSION "0.22"
  25 #define TPACPI_SYSFS_VERSION 0x020300
  26
  27 /*
  28  *  Changelog:
  29  *  2007-10-20          changelog trimmed down
  30  *
  31  *  2007-03-27  0.14    renamed to thinkpad_acpi and moved to
  32  *                      drivers/misc.
  33  *
  34  *  2006-11-22  0.13    new maintainer
  35  *                      changelog now lives in git commit history, and will
  36  *                      not be updated further in-file.
  37  *
  38  *  2005-03-17  0.11    support for 600e, 770x
  39  *                          thanks to Jamie Lentin <lentinj@dial.pipex.com>
  40  *
  41  *  2005-01-16  0.9     use MODULE_VERSION
  42  *                          thanks to Henrik Brix Andersen <brix@gentoo.org>
  43  *                      fix parameter passing on module loading
  44  *                          thanks to Rusty Russell <rusty@rustcorp.com.au>
  45  *                          thanks to Jim Radford <radford@blackbean.org>
  46  *  2004-11-08  0.8     fix init error case, don't return from a macro
  47  *                          thanks to Chris Wright <chrisw@osdl.org>
  48  */
  49
  50 #include <linux/kernel.h>
  51 #include <linux/module.h>
  52 #include <linux/init.h>
  53 #include <linux/types.h>
  54 #include <linux/string.h>
  55 #include <linux/list.h>
  56 #include <linux/mutex.h>
  57 #include <linux/sched.h>
  58 #include <linux/kthread.h>
  59 #include <linux/freezer.h>
  60 #include <linux/delay.h>
  61
  62 #include <linux/nvram.h>
  63 #include <linux/proc_fs.h>
  64 #include <linux/sysfs.h>
  65 #include <linux/backlight.h>
  66 #include <linux/fb.h>
  67 #include <linux/platform_device.h>
  68 #include <linux/hwmon.h>
  69 #include <linux/hwmon-sysfs.h>
  70 #include <linux/input.h>
  71 #include <linux/leds.h>
  72 #include <linux/rfkill.h>
  73 #include <asm/uaccess.h>
  74
  75 #include <linux/dmi.h>
  76 #include <linux/jiffies.h>
  77 #include <linux/workqueue.h>
  78
  79 #include <acpi/acpi_drivers.h>
  80
  81 #include <linux/pci_ids.h>
  82
  83
  84 /* ThinkPad CMOS commands */
  85 #define TP_CMOS_VOLUME_DOWN     0
  86 #define TP_CMOS_VOLUME_UP       1
  87 #define TP_CMOS_VOLUME_MUTE     2
  88 #define TP_CMOS_BRIGHTNESS_UP   4
  89 #define TP_CMOS_BRIGHTNESS_DOWN 5
  90 #define TP_CMOS_THINKLIGHT_ON   12
  91 #define TP_CMOS_THINKLIGHT_OFF  13
  92
  93 /* NVRAM Addresses */
  94 enum tp_nvram_addr {
  95         TP_NVRAM_ADDR_HK2               = 0x57,
  96         TP_NVRAM_ADDR_THINKLIGHT        = 0x58,
  97         TP_NVRAM_ADDR_VIDEO             = 0x59,
  98         TP_NVRAM_ADDR_BRIGHTNESS        = 0x5e,
  99         TP_NVRAM_ADDR_MIXER             = 0x60,
 100 };
 101
 102 /* NVRAM bit masks */
 103 enum {
 104         TP_NVRAM_MASK_HKT_THINKPAD      = 0x08,
 105         TP_NVRAM_MASK_HKT_ZOOM          = 0x20,
 106         TP_NVRAM_MASK_HKT_DISPLAY       = 0x40,
 107         TP_NVRAM_MASK_HKT_HIBERNATE     = 0x80,
 108         TP_NVRAM_MASK_THINKLIGHT        = 0x10,
 109         TP_NVRAM_MASK_HKT_DISPEXPND     = 0x30,
 110         TP_NVRAM_MASK_HKT_BRIGHTNESS    = 0x20,
 111         TP_NVRAM_MASK_LEVEL_BRIGHTNESS  = 0x0f,
 112         TP_NVRAM_POS_LEVEL_BRIGHTNESS   = 0,
 113         TP_NVRAM_MASK_MUTE              = 0x40,
 114         TP_NVRAM_MASK_HKT_VOLUME        = 0x80,
 115         TP_NVRAM_MASK_LEVEL_VOLUME      = 0x0f,
 116         TP_NVRAM_POS_LEVEL_VOLUME       = 0,
 117 };
 118
 119 /* ACPI HIDs */
 120 #define TPACPI_ACPI_HKEY_HID            "IBM0068"
 121
 122 /* Input IDs */
 123 #define TPACPI_HKEY_INPUT_PRODUCT       0x5054 /* "TP" */
 124 #define TPACPI_HKEY_INPUT_VERSION       0x4101
 125
 126 /* ACPI \WGSV commands */
 127 enum {
 128         TP_ACPI_WGSV_GET_STATE          = 0x01, /* Get state information */
 129         TP_ACPI_WGSV_PWR_ON_ON_RESUME   = 0x02, /* Resume WWAN powered on */
 130         TP_ACPI_WGSV_PWR_OFF_ON_RESUME  = 0x03, /* Resume WWAN powered off */
 131         TP_ACPI_WGSV_SAVE_STATE         = 0x04, /* Save state for S4/S5 */
 132 };
 133
 134 /* TP_ACPI_WGSV_GET_STATE bits */
 135 enum {
 136         TP_ACPI_WGSV_STATE_WWANEXIST    = 0x0001, /* WWAN hw available */
 137         TP_ACPI_WGSV_STATE_WWANPWR      = 0x0002, /* WWAN radio enabled */
 138         TP_ACPI_WGSV_STATE_WWANPWRRES   = 0x0004, /* WWAN state at resume */
 139         TP_ACPI_WGSV_STATE_WWANBIOSOFF  = 0x0008, /* WWAN disabled in BIOS */
 140         TP_ACPI_WGSV_STATE_BLTHEXIST    = 0x0001, /* BLTH hw available */
 141         TP_ACPI_WGSV_STATE_BLTHPWR      = 0x0002, /* BLTH radio enabled */
 142         TP_ACPI_WGSV_STATE_BLTHPWRRES   = 0x0004, /* BLTH state at resume */
 143         TP_ACPI_WGSV_STATE_BLTHBIOSOFF  = 0x0008, /* BLTH disabled in BIOS */
 144         TP_ACPI_WGSV_STATE_UWBEXIST     = 0x0010, /* UWB hw available */
 145         TP_ACPI_WGSV_STATE_UWBPWR       = 0x0020, /* UWB radio enabled */
 146 };
 147
 148 /****************************************************************************
 149  * Main driver
 150  */
 151
 152 #define TPACPI_NAME "thinkpad"
 153 #define TPACPI_DESC "ThinkPad ACPI Extras"
 154 #define TPACPI_FILE TPACPI_NAME "_acpi"
 155 #define TPACPI_URL "http://ibm-acpi.sf.net/"
 156 #define TPACPI_MAIL "ibm-acpi-devel@lists.sourceforge.net"
 157
 158 #define TPACPI_PROC_DIR "ibm"
 159 #define TPACPI_ACPI_EVENT_PREFIX "ibm"
 160 #define TPACPI_DRVR_NAME TPACPI_FILE
 161 #define TPACPI_DRVR_SHORTNAME "tpacpi"
 162 #define TPACPI_HWMON_DRVR_NAME TPACPI_NAME "_hwmon"
 163
 164 #define TPACPI_NVRAM_KTHREAD_NAME "ktpacpi_nvramd"
 165 #define TPACPI_WORKQUEUE_NAME "ktpacpid"
 166
 167 #define TPACPI_MAX_ACPI_ARGS 3
 168
 169 /* rfkill switches */
 170 enum {
 171         TPACPI_RFK_BLUETOOTH_SW_ID = 0,
 172         TPACPI_RFK_WWAN_SW_ID,
 173         TPACPI_RFK_UWB_SW_ID,
 174 };
 175
 176 /* printk headers */
 177 #define TPACPI_LOG TPACPI_FILE ": "
 178 #define TPACPI_EMERG    KERN_EMERG      TPACPI_LOG
 179 #define TPACPI_ALERT    KERN_ALERT      TPACPI_LOG
 180 #define TPACPI_CRIT     KERN_CRIT       TPACPI_LOG
 181 #define TPACPI_ERR      KERN_ERR        TPACPI_LOG
 182 #define TPACPI_WARN     KERN_WARNING    TPACPI_LOG
 183 #define TPACPI_NOTICE   KERN_NOTICE     TPACPI_LOG
 184 #define TPACPI_INFO     KERN_INFO       TPACPI_LOG
 185 #define TPACPI_DEBUG    KERN_DEBUG      TPACPI_LOG
 186
 187 /* Debugging printk groups */
 188 #define TPACPI_DBG_ALL          0xffff
 189 #define TPACPI_DBG_DISCLOSETASK 0x8000
 190 #define TPACPI_DBG_INIT         0x0001
 191 #define TPACPI_DBG_EXIT         0x0002
 192 #define TPACPI_DBG_RFKILL       0x0004
 193 #define TPACPI_DBG_HKEY         0x0008
 194 #define TPACPI_DBG_FAN          0x0010
 195 #define TPACPI_DBG_BRGHT        0x0020
 196
 197 #define onoff(status, bit) ((status) & (1 << (bit)) ? "on" : "off")
 198 #define enabled(status, bit) ((status) & (1 << (bit)) ? "enabled" : "disabled")
 199 #define strlencmp(a, b) (strncmp((a), (b), strlen(b)))
 200
 201
 202 /****************************************************************************
 203  * Driver-wide structs and misc. variables
 204  */
 205
 206 struct ibm_struct;
 207
 208 struct tp_acpi_drv_struct {
 209         const struct acpi_device_id *hid;
 210         struct acpi_driver *driver;
 211
 212         void (*notify) (struct ibm_struct *, u32);
 213         acpi_handle *handle;
 214         u32 type;
 215         struct acpi_device *device;
 216 };
 217
 218 struct ibm_struct {
 219         char *name;
 220
 221         int (*read) (char *);
 222         int (*write) (char *);
 223         void (*exit) (void);
 224         void (*resume) (void);
 225         void (*suspend) (pm_message_t state);
 226         void (*shutdown) (void);
 227
 228         struct list_head all_drivers;
 229
 230         struct tp_acpi_drv_struct *acpi;
 231
 232         struct {
 233                 u8 acpi_driver_registered:1;
 234                 u8 acpi_notify_installed:1;
 235                 u8 proc_created:1;
 236                 u8 init_called:1;
 237                 u8 experimental:1;
 238         } flags;
 239 };
 240
 241 struct ibm_init_struct {
 242         char param[32];
 243
 244         int (*init) (struct ibm_init_struct *);
 245         struct ibm_struct *data;
 246 };
 247
 248 static struct {
 249 #ifdef CONFIG_THINKPAD_ACPI_BAY
 250         u32 bay_status:1;
 251         u32 bay_eject:1;
 252         u32 bay_status2:1;
 253         u32 bay_eject2:1;
 254 #endif
 255         u32 bluetooth:1;
 256         u32 hotkey:1;
 257         u32 hotkey_mask:1;
 258         u32 hotkey_wlsw:1;
 259         u32 hotkey_tablet:1;
 260         u32 light:1;
 261         u32 light_status:1;
 262         u32 bright_16levels:1;
 263         u32 bright_acpimode:1;
 264         u32 wan:1;
 265         u32 uwb:1;
 266         u32 fan_ctrl_status_undef:1;
 267         u32 input_device_registered:1;
 268         u32 platform_drv_registered:1;
 269         u32 platform_drv_attrs_registered:1;
 270         u32 sensors_pdrv_registered:1;
 271         u32 sensors_pdrv_attrs_registered:1;
 272         u32 sensors_pdev_attrs_registered:1;
 273         u32 hotkey_poll_active:1;
 274 } tp_features;
 275
 276 static struct {
 277         u16 hotkey_mask_ff:1;
 278 } tp_warned;
 279
 280 struct thinkpad_id_data {
 281         unsigned int vendor;    /* ThinkPad vendor:
 282                                  * PCI_VENDOR_ID_IBM/PCI_VENDOR_ID_LENOVO */
 283
 284         char *bios_version_str; /* Something like 1ZET51WW (1.03z) */
 285         char *ec_version_str;   /* Something like 1ZHT51WW-1.04a */
 286
 287         u16 bios_model;         /* Big Endian, TP-1Y = 0x5931, 0 = unknown */
 288         u16 ec_model;
 289
 290         char *model_str;        /* ThinkPad T43 */
 291         char *nummodel_str;     /* 9384A9C for a 9384-A9C model */
 292 };
 293 static struct thinkpad_id_data thinkpad_id;
 294
 295 static enum {
 296         TPACPI_LIFE_INIT = 0,
 297         TPACPI_LIFE_RUNNING,
 298         TPACPI_LIFE_EXITING,
 299 } tpacpi_lifecycle;
 300
 301 static int experimental;
 302 static u32 dbg_level;
 303
 304 static struct workqueue_struct *tpacpi_wq;
 305
 306 /* Special LED class that can defer work */
 307 struct tpacpi_led_classdev {
 308         struct led_classdev led_classdev;
 309         struct work_struct work;
 310         enum led_brightness new_brightness;
 311         unsigned int led;
 312 };
 313
 314 #ifdef CONFIG_THINKPAD_ACPI_DEBUGFACILITIES
 315 static int dbg_wlswemul;
 316 static int tpacpi_wlsw_emulstate;
 317 static int dbg_bluetoothemul;
 318 static int tpacpi_bluetooth_emulstate;
 319 static int dbg_wwanemul;
 320 static int tpacpi_wwan_emulstate;
 321 static int dbg_uwbemul;
 322 static int tpacpi_uwb_emulstate;
 323 #endif
 324
 325
 326 /*************************************************************************
 327  *  Debugging helpers
 328  */
 329
 330 #define dbg_printk(a_dbg_level, format, arg...) \
 331         do { if (dbg_level & (a_dbg_level)) \
 332                 printk(TPACPI_DEBUG "%s: " format, __func__ , ## arg); \
 333         } while (0)
 334
 335 #ifdef CONFIG_THINKPAD_ACPI_DEBUG
 336 #define vdbg_printk dbg_printk
 337 static const char *str_supported(int is_supported);
 338 #else
 339 #define vdbg_printk(a_dbg_level, format, arg...) \
 340         do { } while (0)
 341 #endif
 342
 343 static void tpacpi_log_usertask(const char * const what)
 344 {
 345         printk(TPACPI_DEBUG "%s: access by process with PID %d\n",
 346                 what, task_tgid_vnr(current));
 347 }
 348
 349 #define tpacpi_disclose_usertask(what, format, arg...) \
 350         do { \
 351                 if (unlikely( \
 352                     (dbg_level & TPACPI_DBG_DISCLOSETASK) && \
 353                     (tpacpi_lifecycle == TPACPI_LIFE_RUNNING))) { \
 354                         printk(TPACPI_DEBUG "%s: PID %d: " format, \
 355                                 what, task_tgid_vnr(current), ## arg); \
 356                 } \
 357         } while (0)
 358
 359 /****************************************************************************
 360  ****************************************************************************
 361  *
 362  * ACPI Helpers and device model
 363  *
 364  ****************************************************************************
 365  ****************************************************************************/
 366
 367 /*************************************************************************
 368  * ACPI basic handles
 369  */
 370
 371 static acpi_handle root_handle;
 372
 373 #define TPACPI_HANDLE(object, parent, paths...)                 \
 374         static acpi_handle  object##_handle;                    \
 375         static acpi_handle *object##_parent = &parent##_handle; \
 376         static char        *object##_path;                      \
 377         static char        *object##_paths[] = { paths }
 378
 379 TPACPI_HANDLE(ec, root, "\\_SB.PCI0.ISA.EC0",   /* 240, 240x */
 380            "\\_SB.PCI.ISA.EC",  /* 570 */
 381            "\\_SB.PCI0.ISA0.EC0",       /* 600e/x, 770e, 770x */
 382            "\\_SB.PCI0.ISA.EC", /* A21e, A2xm/p, T20-22, X20-21 */
 383            "\\_SB.PCI0.AD4S.EC0",       /* i1400, R30 */
 384            "\\_SB.PCI0.ICH3.EC0",       /* R31 */
 385            "\\_SB.PCI0.LPC.EC", /* all others */
 386            );
 387
 388 TPACPI_HANDLE(ecrd, ec, "ECRD");        /* 570 */
 389 TPACPI_HANDLE(ecwr, ec, "ECWR");        /* 570 */
 390
 391 TPACPI_HANDLE(cmos, root, "\\UCMS",     /* R50, R50e, R50p, R51, */
 392                                         /* T4x, X31, X40 */
 393            "\\CMOS",            /* A3x, G4x, R32, T23, T30, X22-24, X30 */
 394            "\\CMS",             /* R40, R40e */
 395            );                   /* all others */
 396
 397 TPACPI_HANDLE(hkey, ec, "\\_SB.HKEY",   /* 600e/x, 770e, 770x */
 398            "^HKEY",             /* R30, R31 */
 399            "HKEY",              /* all others */
 400            );                   /* 570 */
 401
 402 TPACPI_HANDLE(vid, root, "\\_SB.PCI.AGP.VGA",   /* 570 */
 403            "\\_SB.PCI0.AGP0.VID0",      /* 600e/x, 770x */
 404            "\\_SB.PCI0.VID0",   /* 770e */
 405            "\\_SB.PCI0.VID",    /* A21e, G4x, R50e, X30, X40 */
 406            "\\_SB.PCI0.AGP.VID",        /* all others */
 407            );                           /* R30, R31 */
 408
 409
 410 /*************************************************************************
 411  * ACPI helpers
 412  */
 413
 414 static int acpi_evalf(acpi_handle handle,
 415                       void *res, char *method, char *fmt, ...)
 416 {
 417         char *fmt0 = fmt;
 418         struct acpi_object_list params;
 419         union acpi_object in_objs[TPACPI_MAX_ACPI_ARGS];
 420         struct acpi_buffer result, *resultp;
 421         union acpi_object out_obj;
 422         acpi_status status;
 423         va_list ap;
 424         char res_type;
 425         int success;
 426         int quiet;
 427
 428         if (!*fmt) {
 429                 printk(TPACPI_ERR "acpi_evalf() called with empty format\n");
 430                 return 0;
 431         }
 432
 433         if (*fmt == 'q') {
 434                 quiet = 1;
 435                 fmt++;
 436         } else
 437                 quiet = 0;
 438
 439         res_type = *(fmt++);
 440
 441         params.count = 0;
 442         params.pointer = &in_objs[0];
 443
 444         va_start(ap, fmt);
 445         while (*fmt) {
 446                 char c = *(fmt++);
 447                 switch (c) {
 448                 case 'd':       /* int */
 449                         in_objs[params.count].integer.value = va_arg(ap, int);
 450                         in_objs[params.count++].type = ACPI_TYPE_INTEGER;
 451                         break;
 452                         /* add more types as needed */
 453                 default:
 454                         printk(TPACPI_ERR "acpi_evalf() called "
 455                                "with invalid format character '%c'\n", c);
 456                         return 0;
 457                 }
 458         }
 459         va_end(ap);
 460
 461         if (res_type != 'v') {
 462                 result.length = sizeof(out_obj);
 463                 result.pointer = &out_obj;
 464                 resultp = &result;
 465         } else
 466                 resultp = NULL;
 467
 468         status = acpi_evaluate_object(handle, method, &params, resultp);
 469
 470         switch (res_type) {
 471         case 'd':               /* int */
 472                 if (res)
 473                         *(int *)res = out_obj.integer.value;
 474                 success = status == AE_OK && out_obj.type == ACPI_TYPE_INTEGER;
 475                 break;
 476         case 'v':               /* void */
 477                 success = status == AE_OK;
 478                 break;
 479                 /* add more types as needed */
 480         default:
 481                 printk(TPACPI_ERR "acpi_evalf() called "
 482                        "with invalid format character '%c'\n", res_type);
 483                 return 0;
 484         }
 485
 486         if (!success && !quiet)
 487                 printk(TPACPI_ERR "acpi_evalf(%s, %s, ...) failed: %d\n",
 488                        method, fmt0, status);
 489
 490         return success;
 491 }
 492
 493 static int acpi_ec_read(int i, u8 *p)
 494 {
 495         int v;
 496
 497         if (ecrd_handle) {
 498                 if (!acpi_evalf(ecrd_handle, &v, NULL, "dd", i))
 499                         return 0;
 500                 *p = v;
 501         } else {
 502                 if (ec_read(i, p) < 0)
 503                         return 0;
 504         }
 505
 506         return 1;
 507 }
 508
 509 static int acpi_ec_write(int i, u8 v)
 510 {
 511         if (ecwr_handle) {
 512                 if (!acpi_evalf(ecwr_handle, NULL, NULL, "vdd", i, v))
 513                         return 0;
 514         } else {
 515                 if (ec_write(i, v) < 0)
 516                         return 0;
 517         }
 518
 519         return 1;
 520 }
 521
 522 #if defined(CONFIG_THINKPAD_ACPI_DOCK) || defined(CONFIG_THINKPAD_ACPI_BAY)
 523 static int _sta(acpi_handle handle)
 524 {
 525         int status;
 526
 527         if (!handle || !acpi_evalf(handle, &status, "_STA", "d"))
 528                 status = 0;
 529
 530         return status;
 531 }
 532 #endif
 533
 534 static int issue_thinkpad_cmos_command(int cmos_cmd)
 535 {
 536         if (!cmos_handle)
 537                 return -ENXIO;
 538
 539         if (!acpi_evalf(cmos_handle, NULL, NULL, "vd", cmos_cmd))
 540                 return -EIO;
 541
 542         return 0;
 543 }
 544
 545 /*************************************************************************
 546  * ACPI device model
 547  */
 548
 549 #define TPACPI_ACPIHANDLE_INIT(object) \
 550         drv_acpi_handle_init(#object, &object##_handle, *object##_parent, \
 551                 object##_paths, ARRAY_SIZE(object##_paths), &object##_path)
 552
 553 static void drv_acpi_handle_init(char *name,
 554                            acpi_handle *handle, acpi_handle parent,
 555                            char **paths, int num_paths, char **path)
 556 {
 557         int i;
 558         acpi_status status;
 559
 560         vdbg_printk(TPACPI_DBG_INIT, "trying to locate ACPI handle for %s\n",
 561                 name);
 562
 563         for (i = 0; i < num_paths; i++) {
 564                 status = acpi_get_handle(parent, paths[i], handle);
 565                 if (ACPI_SUCCESS(status)) {
 566                         *path = paths[i];
 567                         dbg_printk(TPACPI_DBG_INIT,
 568                                    "Found ACPI handle %s for %s\n",
 569                                    *path, name);
 570                         return;
 571                 }
 572         }
 573
 574         vdbg_printk(TPACPI_DBG_INIT, "ACPI handle for %s not found\n",
 575                     name);
 576         *handle = NULL;
 577 }
 578
 579 static void dispatch_acpi_notify(acpi_handle handle, u32 event, void *data)
 580 {
 581         struct ibm_struct *ibm = data;
 582
 583         if (tpacpi_lifecycle != TPACPI_LIFE_RUNNING)
 584                 return;
 585
 586         if (!ibm || !ibm->acpi || !ibm->acpi->notify)
 587                 return;
 588
 589         ibm->acpi->notify(ibm, event);
 590 }
 591
 592 static int __init setup_acpi_notify(struct ibm_struct *ibm)
 593 {
 594         acpi_status status;
 595         int rc;
 596
 597         BUG_ON(!ibm->acpi);
 598
 599         if (!*ibm->acpi->handle)
 600                 return 0;
 601
 602         vdbg_printk(TPACPI_DBG_INIT,
 603                 "setting up ACPI notify for %s\n", ibm->name);
 604
 605         rc = acpi_bus_get_device(*ibm->acpi->handle, &ibm->acpi->device);
 606         if (rc < 0) {
 607                 printk(TPACPI_ERR "acpi_bus_get_device(%s) failed: %d\n",
 608                         ibm->name, rc);
 609                 return -ENODEV;
 610         }
 611
 612         ibm->acpi->device->driver_data = ibm;
 613         sprintf(acpi_device_class(ibm->acpi->device), "%s/%s",
 614                 TPACPI_ACPI_EVENT_PREFIX,
 615                 ibm->name);
 616
 617         status = acpi_install_notify_handler(*ibm->acpi->handle,
 618                         ibm->acpi->type, dispatch_acpi_notify, ibm);
 619         if (ACPI_FAILURE(status)) {
 620                 if (status == AE_ALREADY_EXISTS) {
 621                         printk(TPACPI_NOTICE
 622                                "another device driver is already "
 623                                "handling %s events\n", ibm->name);
 624                 } else {
 625                         printk(TPACPI_ERR
 626                                "acpi_install_notify_handler(%s) failed: %d\n",
 627                                ibm->name, status);
 628                 }
 629                 return -ENODEV;
 630         }
 631         ibm->flags.acpi_notify_installed = 1;
 632         return 0;
 633 }
 634
 635 static int __init tpacpi_device_add(struct acpi_device *device)
 636 {
 637         return 0;
 638 }
 639
 640 static int __init register_tpacpi_subdriver(struct ibm_struct *ibm)
 641 {
 642         int rc;
 643
 644         dbg_printk(TPACPI_DBG_INIT,
 645                 "registering %s as an ACPI driver\n", ibm->name);
 646
 647         BUG_ON(!ibm->acpi);
 648
 649         ibm->acpi->driver = kzalloc(sizeof(struct acpi_driver), GFP_KERNEL);
 650         if (!ibm->acpi->driver) {
 651                 printk(TPACPI_ERR
 652                        "failed to allocate memory for ibm->acpi->driver\n");
 653                 return -ENOMEM;
 654         }
 655
 656         sprintf(ibm->acpi->driver->name, "%s_%s", TPACPI_NAME, ibm->name);
 657         ibm->acpi->driver->ids = ibm->acpi->hid;
 658
 659         ibm->acpi->driver->ops.add = &tpacpi_device_add;
 660
 661         rc = acpi_bus_register_driver(ibm->acpi->driver);
 662         if (rc < 0) {
 663                 printk(TPACPI_ERR "acpi_bus_register_driver(%s) failed: %d\n",
 664                        ibm->name, rc);
 665                 kfree(ibm->acpi->driver);
 666                 ibm->acpi->driver = NULL;
 667         } else if (!rc)
 668                 ibm->flags.acpi_driver_registered = 1;
 669
 670         return rc;
 671 }
 672
 673
 674 /****************************************************************************
 675  ****************************************************************************
 676  *
 677  * Procfs Helpers
 678  *
 679  ****************************************************************************
 680  ****************************************************************************/
 681
 682 static int dispatch_procfs_read(char *page, char **start, off_t off,
 683                         int count, int *eof, void *data)
 684 {
 685         struct ibm_struct *ibm = data;
 686         int len;
 687
 688         if (!ibm || !ibm->read)
 689                 return -EINVAL;
 690
 691         len = ibm->read(page);
 692         if (len < 0)
 693                 return len;
 694
 695         if (len <= off + count)
 696                 *eof = 1;
 697         *start = page + off;
 698         len -= off;
 699         if (len > count)
 700                 len = count;
 701         if (len < 0)
 702                 len = 0;
 703
 704         return len;
 705 }
 706
 707 static int dispatch_procfs_write(struct file *file,
 708                         const char __user *userbuf,
 709                         unsigned long count, void *data)
 710 {
 711         struct ibm_struct *ibm = data;
 712         char *kernbuf;
 713         int ret;
 714
 715         if (!ibm || !ibm->write)
 716                 return -EINVAL;
 717
 718         kernbuf = kmalloc(count + 2, GFP_KERNEL);
 719         if (!kernbuf)
 720                 return -ENOMEM;
 721
 722         if (copy_from_user(kernbuf, userbuf, count)) {
 723                 kfree(kernbuf);
 724                 return -EFAULT;
 725         }
 726
 727         kernbuf[count] = 0;
 728         strcat(kernbuf, ",");
 729         ret = ibm->write(kernbuf);
 730         if (ret == 0)
 731                 ret = count;
 732
 733         kfree(kernbuf);
 734
 735         return ret;
 736 }
 737
 738 static char *next_cmd(char **cmds)
 739 {
 740         char *start = *cmds;
 741         char *end;
 742
 743         while ((end = strchr(start, ',')) && end == start)
 744                 start = end + 1;
 745
 746         if (!end)
 747                 return NULL;
 748
 749         *end = 0;
 750         *cmds = end + 1;
 751         return start;
 752 }
 753
 754
 755 /****************************************************************************
 756  ****************************************************************************
 757  *
 758  * Device model: input, hwmon and platform
 759  *
 760  ****************************************************************************
 761  ****************************************************************************/
 762
 763 static struct platform_device *tpacpi_pdev;
 764 static struct platform_device *tpacpi_sensors_pdev;
 765 static struct device *tpacpi_hwmon;
 766 static struct input_dev *tpacpi_inputdev;
 767 static struct mutex tpacpi_inputdev_send_mutex;
 768 static LIST_HEAD(tpacpi_all_drivers);
 769
 770 static int tpacpi_suspend_handler(struct platform_device *pdev,
 771                                   pm_message_t state)
 772 {
 773         struct ibm_struct *ibm, *itmp;
 774
 775         list_for_each_entry_safe(ibm, itmp,
 776                                  &tpacpi_all_drivers,
 777                                  all_drivers) {
 778                 if (ibm->suspend)
 779                         (ibm->suspend)(state);
 780         }
 781
 782         return 0;
 783 }
 784
 785 static int tpacpi_resume_handler(struct platform_device *pdev)
 786 {
 787         struct ibm_struct *ibm, *itmp;
 788
 789         list_for_each_entry_safe(ibm, itmp,
 790                                  &tpacpi_all_drivers,
 791                                  all_drivers) {
 792                 if (ibm->resume)
 793                         (ibm->resume)();
 794         }
 795
 796         return 0;
 797 }
 798
 799 static void tpacpi_shutdown_handler(struct platform_device *pdev)
 800 {
 801         struct ibm_struct *ibm, *itmp;
 802
 803         list_for_each_entry_safe(ibm, itmp,
 804                                  &tpacpi_all_drivers,
 805                                  all_drivers) {
 806                 if (ibm->shutdown)
 807                         (ibm->shutdown)();
 808         }
 809 }
 810
 811 static struct platform_driver tpacpi_pdriver = {
 812         .driver = {
 813                 .name = TPACPI_DRVR_NAME,
 814                 .owner = THIS_MODULE,
 815         },
 816         .suspend = tpacpi_suspend_handler,
 817         .resume = tpacpi_resume_handler,
 818         .shutdown = tpacpi_shutdown_handler,
 819 };
 820
 821 static struct platform_driver tpacpi_hwmon_pdriver = {
 822         .driver = {
 823                 .name = TPACPI_HWMON_DRVR_NAME,
 824                 .owner = THIS_MODULE,
 825         },
 826 };
 827
 828 /*************************************************************************
 829  * sysfs support helpers
 830  */
 831
 832 struct attribute_set {
 833         unsigned int members, max_members;
 834         struct attribute_group group;
 835 };
 836
 837 struct attribute_set_obj {
 838         struct attribute_set s;
 839         struct attribute *a;
 840 } __attribute__((packed));
 841
 842 static struct attribute_set *create_attr_set(unsigned int max_members,
 843                                                 const char *name)
 844 {
 845         struct attribute_set_obj *sobj;
 846
 847         if (max_members == 0)
 848                 return NULL;
 849
 850         /* Allocates space for implicit NULL at the end too */
 851         sobj = kzalloc(sizeof(struct attribute_set_obj) +
 852                     max_members * sizeof(struct attribute *),
 853                     GFP_KERNEL);
 854         if (!sobj)
 855                 return NULL;
 856         sobj->s.max_members = max_members;
 857         sobj->s.group.attrs = &sobj->a;
 858         sobj->s.group.name = name;
 859
 860         return &sobj->s;
 861 }
 862
 863 #define destroy_attr_set(_set) \
 864         kfree(_set);
 865
 866 /* not multi-threaded safe, use it in a single thread per set */
 867 static int add_to_attr_set(struct attribute_set *s, struct attribute *attr)
 868 {
 869         if (!s || !attr)
 870                 return -EINVAL;
 871
 872         if (s->members >= s->max_members)
 873                 return -ENOMEM;
 874
 875         s->group.attrs[s->members] = attr;
 876         s->members++;
 877
 878         return 0;
 879 }
 880
 881 static int add_many_to_attr_set(struct attribute_set *s,
 882                         struct attribute **attr,
 883                         unsigned int count)
 884 {
 885         int i, res;
 886
 887         for (i = 0; i < count; i++) {
 888                 res = add_to_attr_set(s, attr[i]);
 889                 if (res)
 890                         return res;
 891         }
 892
 893         return 0;
 894 }
 895
 896 static void delete_attr_set(struct attribute_set *s, struct kobject *kobj)
 897 {
 898         sysfs_remove_group(kobj, &s->group);
 899         destroy_attr_set(s);
 900 }
 901
 902 #define register_attr_set_with_sysfs(_attr_set, _kobj) \
 903         sysfs_create_group(_kobj, &_attr_set->group)
 904
 905 static int parse_strtoul(const char *buf,
 906                 unsigned long max, unsigned long *value)
 907 {
 908         char *endp;
 909
 910         while (*buf && isspace(*buf))
 911                 buf++;
 912         *value = simple_strtoul(buf, &endp, 0);
 913         while (*endp && isspace(*endp))
 914                 endp++;
 915         if (*endp || *value > max)
 916                 return -EINVAL;
 917
 918         return 0;
 919 }
 920
 921 static void tpacpi_disable_brightness_delay(void)
 922 {
 923         if (acpi_evalf(hkey_handle, NULL, "PWMS", "qvd", 0))
 924                 printk(TPACPI_NOTICE
 925                         "ACPI backlight control delay disabled\n");
 926 }
 927
 928 static int __init tpacpi_query_bcl_levels(acpi_handle handle)
 929 {
 930         struct acpi_buffer buffer = { ACPI_ALLOCATE_BUFFER, NULL };
 931         union acpi_object *obj;
 932         int rc;
 933
 934         if (ACPI_SUCCESS(acpi_evaluate_object(handle, NULL, NULL, &buffer))) {
 935                 obj = (union acpi_object *)buffer.pointer;
 936                 if (!obj || (obj->type != ACPI_TYPE_PACKAGE)) {
 937                         printk(TPACPI_ERR "Unknown _BCL data, "
 938                                "please report this to %s\n", TPACPI_MAIL);
 939                         rc = 0;
 940                 } else {
 941                         rc = obj->package.count;
 942                 }
 943         } else {
 944                 return 0;
 945         }
 946
 947         kfree(buffer.pointer);
 948         return rc;
 949 }
 950
 951 static acpi_status __init tpacpi_acpi_walk_find_bcl(acpi_handle handle,
 952                                         u32 lvl, void *context, void **rv)
 953 {
 954         char name[ACPI_PATH_SEGMENT_LENGTH];
 955         struct acpi_buffer buffer = { sizeof(name), &name };
 956
 957         if (ACPI_SUCCESS(acpi_get_name(handle, ACPI_SINGLE_NAME, &buffer)) &&
 958             !strncmp("_BCL", name, sizeof(name) - 1)) {
 959                 BUG_ON(!rv || !*rv);
 960                 **(int **)rv = tpacpi_query_bcl_levels(handle);
 961                 return AE_CTRL_TERMINATE;
 962         } else {
 963                 return AE_OK;
 964         }
 965 }
 966
 967 /*
 968  * Returns 0 (no ACPI _BCL or _BCL invalid), or size of brightness map
 969  */
 970 static int __init tpacpi_check_std_acpi_brightness_support(void)
 971 {
 972         int status;
 973         int bcl_levels = 0;
 974         void *bcl_ptr = &bcl_levels;
 975
 976         if (!vid_handle) {
 977                 TPACPI_ACPIHANDLE_INIT(vid);
 978         }
 979         if (!vid_handle)
 980                 return 0;
 981
 982         /*
 983          * Search for a _BCL method, and execute it.  This is safe on all
 984          * ThinkPads, and as a side-effect, _BCL will place a Lenovo Vista
 985          * BIOS in ACPI backlight control mode.  We do NOT have to care
 986          * about calling the _BCL method in an enabled video device, any
 987          * will do for our purposes.
 988          */
 989
 990         status = acpi_walk_namespace(ACPI_TYPE_METHOD, vid_handle, 3,
 991                                      tpacpi_acpi_walk_find_bcl, NULL,
 992                                      &bcl_ptr);
 993
 994         if (ACPI_SUCCESS(status) && bcl_levels > 2) {
 995                 tp_features.bright_acpimode = 1;
 996                 return (bcl_levels - 2);
 997         }
 998
 999         return 0;
1000 }
1001
1002 static int __init tpacpi_new_rfkill(const unsigned int id,
1003                         struct rfkill **rfk,
1004                         const enum rfkill_type rfktype,
1005                         const char *name,
1006                         const bool set_default,
1007                         int (*toggle_radio)(void *, enum rfkill_state),
1008                         int (*get_state)(void *, enum rfkill_state *))
1009 {
1010         int res;
1011         enum rfkill_state initial_state = RFKILL_STATE_SOFT_BLOCKED;
1012
1013         res = get_state(NULL, &initial_state);
1014         if (res < 0) {
1015                 printk(TPACPI_ERR
1016                         "failed to read initial state for %s, error %d; "
1017                         "will turn radio off\n", name, res);
1018         } else if (set_default) {
1019                 /* try to set the initial state as the default for the rfkill
1020                  * type, since we ask the firmware to preserve it across S5 in
1021                  * NVRAM */
1022                 if (rfkill_set_default(rfktype,
1023                                 (initial_state == RFKILL_STATE_UNBLOCKED) ?
1024                                         RFKILL_STATE_UNBLOCKED :
1025                                         RFKILL_STATE_SOFT_BLOCKED) == -EPERM)
1026                         vdbg_printk(TPACPI_DBG_RFKILL,
1027                                     "Default state for %s cannot be changed\n",
1028                                     name);
1029         }
1030
1031         *rfk = rfkill_allocate(&tpacpi_pdev->dev, rfktype);
1032         if (!*rfk) {
1033                 printk(TPACPI_ERR
1034                         "failed to allocate memory for rfkill class\n");
1035                 return -ENOMEM;
1036         }
1037
1038         (*rfk)->name = name;
1039         (*rfk)->get_state = get_state;
1040         (*rfk)->toggle_radio = toggle_radio;
1041         (*rfk)->state = initial_state;
1042
1043         res = rfkill_register(*rfk);
1044         if (res < 0) {
1045                 printk(TPACPI_ERR
1046                         "failed to register %s rfkill switch: %d\n",
1047                         name, res);
1048                 rfkill_free(*rfk);
1049                 *rfk = NULL;
1050                 return res;
1051         }
1052
1053         return 0;
1054 }
1055
1056 static void printk_deprecated_attribute(const char * const what,
1057                                         const char * const details)
1058 {
1059         tpacpi_log_usertask("deprecated sysfs attribute");
1060         printk(TPACPI_WARN "WARNING: sysfs attribute %s is deprecated and "
1061                 "will be removed. %s\n",
1062                 what, details);
1063 }
1064
1065 static void printk_deprecated_rfkill_attribute(const char * const what)
1066 {
1067         printk_deprecated_attribute(what,
1068                         "Please switch to generic rfkill before year 2010");
1069 }
1070
1071 /*************************************************************************
1072  * thinkpad-acpi driver attributes
1073  */
1074
1075 /* interface_version --------------------------------------------------- */
1076 static ssize_t tpacpi_driver_interface_version_show(
1077                                 struct device_driver *drv,
1078                                 char *buf)
1079 {
1080         return snprintf(buf, PAGE_SIZE, "0x%08x\n", TPACPI_SYSFS_VERSION);
1081 }
1082
1083 static DRIVER_ATTR(interface_version, S_IRUGO,
1084                 tpacpi_driver_interface_version_show, NULL);
1085
1086 /* debug_level --------------------------------------------------------- */
1087 static ssize_t tpacpi_driver_debug_show(struct device_driver *drv,
1088                                                 char *buf)
1089 {
1090         return snprintf(buf, PAGE_SIZE, "0x%04x\n", dbg_level);
1091 }
1092
1093 static ssize_t tpacpi_driver_debug_store(struct device_driver *drv,
1094                                                 const char *buf, size_t count)
1095 {
1096         unsigned long t;
1097
1098         if (parse_strtoul(buf, 0xffff, &t))
1099                 return -EINVAL;
1100
1101         dbg_level = t;
1102
1103         return count;
1104 }
1105
1106 static DRIVER_ATTR(debug_level, S_IWUSR | S_IRUGO,
1107                 tpacpi_driver_debug_show, tpacpi_driver_debug_store);
1108
1109 /* version ------------------------------------------------------------- */
1110 static ssize_t tpacpi_driver_version_show(struct device_driver *drv,
1111                                                 char *buf)
1112 {
1113         return snprintf(buf, PAGE_SIZE, "%s v%s\n",
1114                         TPACPI_DESC, TPACPI_VERSION);
1115 }
1116
1117 static DRIVER_ATTR(version, S_IRUGO,
1118                 tpacpi_driver_version_show, NULL);
1119
1120 /* --------------------------------------------------------------------- */
1121
1122 #ifdef CONFIG_THINKPAD_ACPI_DEBUGFACILITIES
1123
1124 static void tpacpi_send_radiosw_update(void);
1125
1126 /* wlsw_emulstate ------------------------------------------------------ */
1127 static ssize_t tpacpi_driver_wlsw_emulstate_show(struct device_driver *drv,
1128                                                 char *buf)
1129 {
1130         return snprintf(buf, PAGE_SIZE, "%d\n", !!tpacpi_wlsw_emulstate);
1131 }
1132
1133 static ssize_t tpacpi_driver_wlsw_emulstate_store(struct device_driver *drv,
1134                                                 const char *buf, size_t count)
1135 {
1136         unsigned long t;
1137
1138         if (parse_strtoul(buf, 1, &t))
1139                 return -EINVAL;
1140
1141         if (tpacpi_wlsw_emulstate != t) {
1142                 tpacpi_wlsw_emulstate = !!t;
1143                 tpacpi_send_radiosw_update();
1144         } else
1145                 tpacpi_wlsw_emulstate = !!t;
1146
1147         return count;
1148 }
1149
1150 static DRIVER_ATTR(wlsw_emulstate, S_IWUSR | S_IRUGO,
1151                 tpacpi_driver_wlsw_emulstate_show,
1152                 tpacpi_driver_wlsw_emulstate_store);
1153
1154 /* bluetooth_emulstate ------------------------------------------------- */
1155 static ssize_t tpacpi_driver_bluetooth_emulstate_show(
1156                                         struct device_driver *drv,
1157                                         char *buf)
1158 {
1159         return snprintf(buf, PAGE_SIZE, "%d\n", !!tpacpi_bluetooth_emulstate);
1160 }
1161
1162 static ssize_t tpacpi_driver_bluetooth_emulstate_store(
1163                                         struct device_driver *drv,
1164                                         const char *buf, size_t count)
1165 {
1166         unsigned long t;
1167
1168         if (parse_strtoul(buf, 1, &t))
1169                 return -EINVAL;
1170
1171         tpacpi_bluetooth_emulstate = !!t;
1172
1173         return count;
1174 }
1175
1176 static DRIVER_ATTR(bluetooth_emulstate, S_IWUSR | S_IRUGO,
1177                 tpacpi_driver_bluetooth_emulstate_show,
1178                 tpacpi_driver_bluetooth_emulstate_store);
1179
1180 /* wwan_emulstate ------------------------------------------------- */
1181 static ssize_t tpacpi_driver_wwan_emulstate_show(
1182                                         struct device_driver *drv,
1183                                         char *buf)
1184 {
1185         return snprintf(buf, PAGE_SIZE, "%d\n", !!tpacpi_wwan_emulstate);
1186 }
1187
1188 static ssize_t tpacpi_driver_wwan_emulstate_store(
1189                                         struct device_driver *drv,
1190                                         const char *buf, size_t count)
1191 {
1192         unsigned long t;
1193
1194         if (parse_strtoul(buf, 1, &t))
1195                 return -EINVAL;
1196
1197         tpacpi_wwan_emulstate = !!t;
1198
1199         return count;
1200 }
1201
1202 static DRIVER_ATTR(wwan_emulstate, S_IWUSR | S_IRUGO,
1203                 tpacpi_driver_wwan_emulstate_show,
1204                 tpacpi_driver_wwan_emulstate_store);
1205
1206 /* uwb_emulstate ------------------------------------------------- */
1207 static ssize_t tpacpi_driver_uwb_emulstate_show(
1208                                         struct device_driver *drv,
1209                                         char *buf)
1210 {
1211         return snprintf(buf, PAGE_SIZE, "%d\n", !!tpacpi_uwb_emulstate);
1212 }
1213
1214 static ssize_t tpacpi_driver_uwb_emulstate_store(
1215                                         struct device_driver *drv,
1216                                         const char *buf, size_t count)
1217 {
1218         unsigned long t;
1219
1220         if (parse_strtoul(buf, 1, &t))
1221                 return -EINVAL;
1222
1223         tpacpi_uwb_emulstate = !!t;
1224
1225         return count;
1226 }
1227
1228 static DRIVER_ATTR(uwb_emulstate, S_IWUSR | S_IRUGO,
1229                 tpacpi_driver_uwb_emulstate_show,
1230                 tpacpi_driver_uwb_emulstate_store);
1231 #endif
1232
1233 /* --------------------------------------------------------------------- */
1234
1235 static struct driver_attribute *tpacpi_driver_attributes[] = {
1236         &driver_attr_debug_level, &driver_attr_version,
1237         &driver_attr_interface_version,
1238 };
1239
1240 static int __init tpacpi_create_driver_attributes(struct device_driver *drv)
1241 {
1242         int i, res;
1243
1244         i = 0;
1245         res = 0;
1246         while (!res && i < ARRAY_SIZE(tpacpi_driver_attributes)) {
1247                 res = driver_create_file(drv, tpacpi_driver_attributes[i]);
1248                 i++;
1249         }
1250
1251 #ifdef CONFIG_THINKPAD_ACPI_DEBUGFACILITIES
1252         if (!res && dbg_wlswemul)
1253                 res = driver_create_file(drv, &driver_attr_wlsw_emulstate);
1254         if (!res && dbg_bluetoothemul)
1255                 res = driver_create_file(drv, &driver_attr_bluetooth_emulstate);
1256         if (!res && dbg_wwanemul)
1257                 res = driver_create_file(drv, &driver_attr_wwan_emulstate);
1258         if (!res && dbg_uwbemul)
1259                 res = driver_create_file(drv, &driver_attr_uwb_emulstate);
1260 #endif
1261
1262         return res;
1263 }
1264
1265 static void tpacpi_remove_driver_attributes(struct device_driver *drv)
1266 {
1267         int i;
1268
1269         for (i = 0; i < ARRAY_SIZE(tpacpi_driver_attributes); i++)
1270                 driver_remove_file(drv, tpacpi_driver_attributes[i]);
1271
1272 #ifdef THINKPAD_ACPI_DEBUGFACILITIES
1273         driver_remove_file(drv, &driver_attr_wlsw_emulstate);
1274         driver_remove_file(drv, &driver_attr_bluetooth_emulstate);
1275         driver_remove_file(drv, &driver_attr_wwan_emulstate);
1276         driver_remove_file(drv, &driver_attr_uwb_emulstate);
1277 #endif
1278 }
1279
1280 /****************************************************************************
1281  ****************************************************************************
1282  *
1283  * Subdrivers
1284  *
1285  ****************************************************************************
1286  ****************************************************************************/
1287
1288 /*************************************************************************
1289  * thinkpad-acpi init subdriver
1290  */
1291
1292 static int __init thinkpad_acpi_driver_init(struct ibm_init_struct *iibm)
1293 {
1294         printk(TPACPI_INFO "%s v%s\n", TPACPI_DESC, TPACPI_VERSION);
1295         printk(TPACPI_INFO "%s\n", TPACPI_URL);
1296
1297         printk(TPACPI_INFO "ThinkPad BIOS %s, EC %s\n",
1298                 (thinkpad_id.bios_version_str) ?
1299                         thinkpad_id.bios_version_str : "unknown",
1300                 (thinkpad_id.ec_version_str) ?
1301                         thinkpad_id.ec_version_str : "unknown");
1302
1303         if (thinkpad_id.vendor && thinkpad_id.model_str)
1304                 printk(TPACPI_INFO "%s %s, model %s\n",
1305                         (thinkpad_id.vendor == PCI_VENDOR_ID_IBM) ?
1306                                 "IBM" : ((thinkpad_id.vendor ==
1307                                                 PCI_VENDOR_ID_LENOVO) ?
1308                                         "Lenovo" : "Unknown vendor"),
1309                         thinkpad_id.model_str,
1310                         (thinkpad_id.nummodel_str) ?
1311                                 thinkpad_id.nummodel_str : "unknown");
1312
1313         return 0;
1314 }
1315
1316 static int thinkpad_acpi_driver_read(char *p)
1317 {
1318         int len = 0;
1319
1320         len += sprintf(p + len, "driver:\t\t%s\n", TPACPI_DESC);
1321         len += sprintf(p + len, "version:\t%s\n", TPACPI_VERSION);
1322
1323         return len;
1324 }
1325
1326 static struct ibm_struct thinkpad_acpi_driver_data = {
1327         .name = "driver",
1328         .read = thinkpad_acpi_driver_read,
1329 };
1330
1331 /*************************************************************************
1332  * Hotkey subdriver
1333  */
1334
1335 enum {  /* hot key scan codes (derived from ACPI DSDT) */
1336         TP_ACPI_HOTKEYSCAN_FNF1         = 0,
1337         TP_ACPI_HOTKEYSCAN_FNF2,
1338         TP_ACPI_HOTKEYSCAN_FNF3,
1339         TP_ACPI_HOTKEYSCAN_FNF4,
1340         TP_ACPI_HOTKEYSCAN_FNF5,
1341         TP_ACPI_HOTKEYSCAN_FNF6,
1342         TP_ACPI_HOTKEYSCAN_FNF7,
1343         TP_ACPI_HOTKEYSCAN_FNF8,
1344         TP_ACPI_HOTKEYSCAN_FNF9,
1345         TP_ACPI_HOTKEYSCAN_FNF10,
1346         TP_ACPI_HOTKEYSCAN_FNF11,
1347         TP_ACPI_HOTKEYSCAN_FNF12,
1348         TP_ACPI_HOTKEYSCAN_FNBACKSPACE,
1349         TP_ACPI_HOTKEYSCAN_FNINSERT,
1350         TP_ACPI_HOTKEYSCAN_FNDELETE,
1351         TP_ACPI_HOTKEYSCAN_FNHOME,
1352         TP_ACPI_HOTKEYSCAN_FNEND,
1353         TP_ACPI_HOTKEYSCAN_FNPAGEUP,
1354         TP_ACPI_HOTKEYSCAN_FNPAGEDOWN,
1355         TP_ACPI_HOTKEYSCAN_FNSPACE,
1356         TP_ACPI_HOTKEYSCAN_VOLUMEUP,
1357         TP_ACPI_HOTKEYSCAN_VOLUMEDOWN,
1358         TP_ACPI_HOTKEYSCAN_MUTE,
1359         TP_ACPI_HOTKEYSCAN_THINKPAD,
1360 };
1361
1362 enum {  /* Keys available through NVRAM polling */
1363         TPACPI_HKEY_NVRAM_KNOWN_MASK = 0x00fb88c0U,
1364         TPACPI_HKEY_NVRAM_GOOD_MASK  = 0x00fb8000U,
1365 };
1366
1367 enum {  /* Positions of some of the keys in hotkey masks */
1368         TP_ACPI_HKEY_DISPSWTCH_MASK     = 1 << TP_ACPI_HOTKEYSCAN_FNF7,
1369         TP_ACPI_HKEY_DISPXPAND_MASK     = 1 << TP_ACPI_HOTKEYSCAN_FNF8,
1370         TP_ACPI_HKEY_HIBERNATE_MASK     = 1 << TP_ACPI_HOTKEYSCAN_FNF12,
1371         TP_ACPI_HKEY_BRGHTUP_MASK       = 1 << TP_ACPI_HOTKEYSCAN_FNHOME,
1372         TP_ACPI_HKEY_BRGHTDWN_MASK      = 1 << TP_ACPI_HOTKEYSCAN_FNEND,
1373         TP_ACPI_HKEY_THNKLGHT_MASK      = 1 << TP_ACPI_HOTKEYSCAN_FNPAGEUP,
1374         TP_ACPI_HKEY_ZOOM_MASK          = 1 << TP_ACPI_HOTKEYSCAN_FNSPACE,
1375         TP_ACPI_HKEY_VOLUP_MASK         = 1 << TP_ACPI_HOTKEYSCAN_VOLUMEUP,
1376         TP_ACPI_HKEY_VOLDWN_MASK        = 1 << TP_ACPI_HOTKEYSCAN_VOLUMEDOWN,
1377         TP_ACPI_HKEY_MUTE_MASK          = 1 << TP_ACPI_HOTKEYSCAN_MUTE,
1378         TP_ACPI_HKEY_THINKPAD_MASK      = 1 << TP_ACPI_HOTKEYSCAN_THINKPAD,
1379 };
1380
1381 enum {  /* NVRAM to ACPI HKEY group map */
1382         TP_NVRAM_HKEY_GROUP_HK2         = TP_ACPI_HKEY_THINKPAD_MASK |
1383                                           TP_ACPI_HKEY_ZOOM_MASK |
1384                                           TP_ACPI_HKEY_DISPSWTCH_MASK |
1385                                           TP_ACPI_HKEY_HIBERNATE_MASK,
1386         TP_NVRAM_HKEY_GROUP_BRIGHTNESS  = TP_ACPI_HKEY_BRGHTUP_MASK |
1387                                           TP_ACPI_HKEY_BRGHTDWN_MASK,
1388         TP_NVRAM_HKEY_GROUP_VOLUME      = TP_ACPI_HKEY_VOLUP_MASK |
1389                                           TP_ACPI_HKEY_VOLDWN_MASK |
1390                                           TP_ACPI_HKEY_MUTE_MASK,
1391 };
1392
1393 #ifdef CONFIG_THINKPAD_ACPI_HOTKEY_POLL
1394 struct tp_nvram_state {
1395        u16 thinkpad_toggle:1;
1396        u16 zoom_toggle:1;
1397        u16 display_toggle:1;
1398        u16 thinklight_toggle:1;
1399        u16 hibernate_toggle:1;
1400        u16 displayexp_toggle:1;
1401        u16 display_state:1;
1402        u16 brightness_toggle:1;
1403        u16 volume_toggle:1;
1404        u16 mute:1;
1405
1406        u8 brightness_level;
1407        u8 volume_level;
1408 };
1409
1410 static struct task_struct *tpacpi_hotkey_task;
1411 static u32 hotkey_source_mask;          /* bit mask 0=ACPI,1=NVRAM */
1412 static int hotkey_poll_freq = 10;       /* Hz */
1413 static struct mutex hotkey_thread_mutex;
1414 static struct mutex hotkey_thread_data_mutex;
1415 static unsigned int hotkey_config_change;
1416
1417 #else /* CONFIG_THINKPAD_ACPI_HOTKEY_POLL */
1418
1419 #define hotkey_source_mask 0U
1420
1421 #endif /* CONFIG_THINKPAD_ACPI_HOTKEY_POLL */
1422
1423 static struct mutex hotkey_mutex;
1424
1425 static enum {   /* Reasons for waking up */
1426         TP_ACPI_WAKEUP_NONE = 0,        /* None or unknown */
1427         TP_ACPI_WAKEUP_BAYEJ,           /* Bay ejection request */
1428         TP_ACPI_WAKEUP_UNDOCK,          /* Undock request */
1429 } hotkey_wakeup_reason;
1430
1431 static int hotkey_autosleep_ack;
1432
1433 static u32 hotkey_orig_mask;
1434 static u32 hotkey_all_mask;
1435 static u32 hotkey_reserved_mask;
1436 static u32 hotkey_mask;
1437
1438 static unsigned int hotkey_report_mode;
1439
1440 static u16 *hotkey_keycode_map;
1441
1442 static struct attribute_set *hotkey_dev_attributes;
1443
1444 #ifdef CONFIG_THINKPAD_ACPI_HOTKEY_POLL
1445 #define HOTKEY_CONFIG_CRITICAL_START \
1446         do { \
1447                 mutex_lock(&hotkey_thread_data_mutex); \
1448                 hotkey_config_change++; \
1449         } while (0);
1450 #define HOTKEY_CONFIG_CRITICAL_END \
1451         mutex_unlock(&hotkey_thread_data_mutex);
1452 #else
1453 #define HOTKEY_CONFIG_CRITICAL_START
1454 #define HOTKEY_CONFIG_CRITICAL_END
1455 #endif /* CONFIG_THINKPAD_ACPI_HOTKEY_POLL */
1456
1457 /* HKEY.MHKG() return bits */
1458 #define TP_HOTKEY_TABLET_MASK (1 << 3)
1459
1460 static int hotkey_get_wlsw(int *status)
1461 {
1462 #ifdef CONFIG_THINKPAD_ACPI_DEBUGFACILITIES
1463         if (dbg_wlswemul) {
1464                 *status = !!tpacpi_wlsw_emulstate;
1465                 return 0;
1466         }
1467 #endif
1468         if (!acpi_evalf(hkey_handle, status, "WLSW", "d"))
1469                 return -EIO;
1470         return 0;
1471 }
1472
1473 static int hotkey_get_tablet_mode(int *status)
1474 {
1475         int s;
1476
1477         if (!acpi_evalf(hkey_handle, &s, "MHKG", "d"))
1478                 return -EIO;
1479
1480         *status = ((s & TP_HOTKEY_TABLET_MASK) != 0);
1481         return 0;
1482 }
1483
1484 /*
1485  * Call with hotkey_mutex held
1486  */
1487 static int hotkey_mask_get(void)
1488 {
1489         u32 m = 0;
1490
1491         if (tp_features.hotkey_mask) {
1492                 if (!acpi_evalf(hkey_handle, &m, "DHKN", "d"))
1493                         return -EIO;
1494         }
1495         hotkey_mask = m | (hotkey_source_mask & hotkey_mask);
1496
1497         return 0;
1498 }
1499
1500 /*
1501  * Call with hotkey_mutex held
1502  */
1503 static int hotkey_mask_set(u32 mask)
1504 {
1505         int i;
1506         int rc = 0;
1507
1508         if (tp_features.hotkey_mask) {
1509                 if (!tp_warned.hotkey_mask_ff &&
1510                     (mask == 0xffff || mask == 0xffffff ||
1511                      mask == 0xffffffff)) {
1512                         tp_warned.hotkey_mask_ff = 1;
1513                         printk(TPACPI_NOTICE
1514                                "setting the hotkey mask to 0x%08x is likely "
1515                                "not the best way to go about it\n", mask);
1516                         printk(TPACPI_NOTICE
1517                                "please consider using the driver defaults, "
1518                                "and refer to up-to-date thinkpad-acpi "
1519                                "documentation\n");
1520                 }
1521
1522                 HOTKEY_CONFIG_CRITICAL_START
1523                 for (i = 0; i < 32; i++) {
1524                         u32 m = 1 << i;
1525                         /* enable in firmware mask only keys not in NVRAM
1526                          * mode, but enable the key in the cached hotkey_mask
1527                          * regardless of mode, or the key will end up
1528                          * disabled by hotkey_mask_get() */
1529                         if (!acpi_evalf(hkey_handle,
1530                                         NULL, "MHKM", "vdd", i + 1,
1531                                         !!((mask & ~hotkey_source_mask) & m))) {
1532                                 rc = -EIO;
1533                                 break;
1534                         } else {
1535                                 hotkey_mask = (hotkey_mask & ~m) | (mask & m);
1536                         }
1537                 }
1538                 HOTKEY_CONFIG_CRITICAL_END
1539
1540                 /* hotkey_mask_get must be called unconditionally below */
1541                 if (!hotkey_mask_get() && !rc &&
1542                     (hotkey_mask & ~hotkey_source_mask) !=
1543                      (mask & ~hotkey_source_mask)) {
1544                         printk(TPACPI_NOTICE
1545                                "requested hot key mask 0x%08x, but "
1546                                "firmware forced it to 0x%08x\n",
1547                                mask, hotkey_mask);
1548                 }
1549         } else {
1550 #ifdef CONFIG_THINKPAD_ACPI_HOTKEY_POLL
1551                 HOTKEY_CONFIG_CRITICAL_START
1552                 hotkey_mask = mask & hotkey_source_mask;
1553                 HOTKEY_CONFIG_CRITICAL_END
1554                 hotkey_mask_get();
1555                 if (hotkey_mask != mask) {
1556                         printk(TPACPI_NOTICE
1557                                "requested hot key mask 0x%08x, "
1558                                "forced to 0x%08x (NVRAM poll mask is "
1559                                "0x%08x): no firmware mask support\n",
1560                                mask, hotkey_mask, hotkey_source_mask);
1561                 }
1562 #else
1563                 hotkey_mask_get();
1564                 rc = -ENXIO;
1565 #endif /* CONFIG_THINKPAD_ACPI_HOTKEY_POLL */
1566         }
1567
1568         return rc;
1569 }
1570
1571 static int hotkey_status_get(int *status)
1572 {
1573         if (!acpi_evalf(hkey_handle, status, "DHKC", "d"))
1574                 return -EIO;
1575
1576         return 0;
1577 }
1578
1579 static int hotkey_status_set(bool enable)
1580 {
1581         if (!acpi_evalf(hkey_handle, NULL, "MHKC", "vd", enable ? 1 : 0))
1582                 return -EIO;
1583
1584         return 0;
1585 }
1586
1587 static void tpacpi_input_send_tabletsw(void)
1588 {
1589         int state;
1590
1591         if (tp_features.hotkey_tablet &&
1592             !hotkey_get_tablet_mode(&state)) {
1593                 mutex_lock(&tpacpi_inputdev_send_mutex);
1594
1595                 input_report_switch(tpacpi_inputdev,
1596                                     SW_TABLET_MODE, !!state);
1597                 input_sync(tpacpi_inputdev);
1598
1599                 mutex_unlock(&tpacpi_inputdev_send_mutex);
1600         }
1601 }
1602
1603 static void tpacpi_input_send_key(unsigned int scancode)
1604 {
1605         unsigned int keycode;
1606
1607         keycode = hotkey_keycode_map[scancode];
1608
1609         if (keycode != KEY_RESERVED) {
1610                 mutex_lock(&tpacpi_inputdev_send_mutex);
1611
1612                 input_report_key(tpacpi_inputdev, keycode, 1);
1613                 if (keycode == KEY_UNKNOWN)
1614                         input_event(tpacpi_inputdev, EV_MSC, MSC_SCAN,
1615                                     scancode);
1616                 input_sync(tpacpi_inputdev);
1617
1618                 input_report_key(tpacpi_inputdev, keycode, 0);
1619                 if (keycode == KEY_UNKNOWN)
1620                         input_event(tpacpi_inputdev, EV_MSC, MSC_SCAN,
1621                                     scancode);
1622                 input_sync(tpacpi_inputdev);
1623
1624                 mutex_unlock(&tpacpi_inputdev_send_mutex);
1625         }
1626 }
1627
1628 #ifdef CONFIG_THINKPAD_ACPI_HOTKEY_POLL
1629 static struct tp_acpi_drv_struct ibm_hotkey_acpidriver;
1630
1631 static void tpacpi_hotkey_send_key(unsigned int scancode)
1632 {
1633         tpacpi_input_send_key(scancode);
1634         if (hotkey_report_mode < 2) {
1635                 acpi_bus_generate_proc_event(ibm_hotkey_acpidriver.device,
1636                                                 0x80, 0x1001 + scancode);
1637         }
1638 }
1639
1640 static void hotkey_read_nvram(struct tp_nvram_state *n, u32 m)
1641 {
1642         u8 d;
1643
1644         if (m & TP_NVRAM_HKEY_GROUP_HK2) {
1645                 d = nvram_read_byte(TP_NVRAM_ADDR_HK2);
1646                 n->thinkpad_toggle = !!(d & TP_NVRAM_MASK_HKT_THINKPAD);
1647                 n->zoom_toggle = !!(d & TP_NVRAM_MASK_HKT_ZOOM);
1648                 n->display_toggle = !!(d & TP_NVRAM_MASK_HKT_DISPLAY);
1649                 n->hibernate_toggle = !!(d & TP_NVRAM_MASK_HKT_HIBERNATE);
1650         }
1651         if (m & TP_ACPI_HKEY_THNKLGHT_MASK) {
1652                 d = nvram_read_byte(TP_NVRAM_ADDR_THINKLIGHT);
1653                 n->thinklight_toggle = !!(d & TP_NVRAM_MASK_THINKLIGHT);
1654         }
1655         if (m & TP_ACPI_HKEY_DISPXPAND_MASK) {
1656                 d = nvram_read_byte(TP_NVRAM_ADDR_VIDEO);
1657                 n->displayexp_toggle =
1658                                 !!(d & TP_NVRAM_MASK_HKT_DISPEXPND);
1659         }
1660         if (m & TP_NVRAM_HKEY_GROUP_BRIGHTNESS) {
1661                 d = nvram_read_byte(TP_NVRAM_ADDR_BRIGHTNESS);
1662                 n->brightness_level = (d & TP_NVRAM_MASK_LEVEL_BRIGHTNESS)
1663                                 >> TP_NVRAM_POS_LEVEL_BRIGHTNESS;
1664                 n->brightness_toggle =
1665                                 !!(d & TP_NVRAM_MASK_HKT_BRIGHTNESS);
1666         }
1667         if (m & TP_NVRAM_HKEY_GROUP_VOLUME) {
1668                 d = nvram_read_byte(TP_NVRAM_ADDR_MIXER);
1669                 n->volume_level = (d & TP_NVRAM_MASK_LEVEL_VOLUME)
1670                                 >> TP_NVRAM_POS_LEVEL_VOLUME;
1671                 n->mute = !!(d & TP_NVRAM_MASK_MUTE);
1672                 n->volume_toggle = !!(d & TP_NVRAM_MASK_HKT_VOLUME);
1673         }
1674 }
1675
1676 #define TPACPI_COMPARE_KEY(__scancode, __member) \
1677         do { \
1678                 if ((mask & (1 << __scancode)) && \
1679                     oldn->__member != newn->__member) \
1680                 tpacpi_hotkey_send_key(__scancode); \
1681         } while (0)
1682
1683 #define TPACPI_MAY_SEND_KEY(__scancode) \
1684         do { if (mask & (1 << __scancode)) \
1685                 tpacpi_hotkey_send_key(__scancode); } while (0)
1686
1687 static void hotkey_compare_and_issue_event(struct tp_nvram_state *oldn,
1688                                            struct tp_nvram_state *newn,
1689                                            u32 mask)
1690 {
1691         TPACPI_COMPARE_KEY(TP_ACPI_HOTKEYSCAN_THINKPAD, thinkpad_toggle);
1692         TPACPI_COMPARE_KEY(TP_ACPI_HOTKEYSCAN_FNSPACE, zoom_toggle);
1693         TPACPI_COMPARE_KEY(TP_ACPI_HOTKEYSCAN_FNF7, display_toggle);
1694         TPACPI_COMPARE_KEY(TP_ACPI_HOTKEYSCAN_FNF12, hibernate_toggle);
1695
1696         TPACPI_COMPARE_KEY(TP_ACPI_HOTKEYSCAN_FNPAGEUP, thinklight_toggle);
1697
1698         TPACPI_COMPARE_KEY(TP_ACPI_HOTKEYSCAN_FNF8, displayexp_toggle);
1699
1700         /* handle volume */
1701         if (oldn->volume_toggle != newn->volume_toggle) {
1702                 if (oldn->mute != newn->mute) {
1703                         TPACPI_MAY_SEND_KEY(TP_ACPI_HOTKEYSCAN_MUTE);
1704                 }
1705                 if (oldn->volume_level > newn->volume_level) {
1706                         TPACPI_MAY_SEND_KEY(TP_ACPI_HOTKEYSCAN_VOLUMEDOWN);
1707                 } else if (oldn->volume_level < newn->volume_level) {
1708                         TPACPI_MAY_SEND_KEY(TP_ACPI_HOTKEYSCAN_VOLUMEUP);
1709                 } else if (oldn->mute == newn->mute) {
1710                         /* repeated key presses that didn't change state */
1711                         if (newn->mute) {
1712                                 TPACPI_MAY_SEND_KEY(TP_ACPI_HOTKEYSCAN_MUTE);
1713                         } else if (newn->volume_level != 0) {
1714                                 TPACPI_MAY_SEND_KEY(TP_ACPI_HOTKEYSCAN_VOLUMEUP);
1715                         } else {
1716                                 TPACPI_MAY_SEND_KEY(TP_ACPI_HOTKEYSCAN_VOLUMEDOWN);
1717                         }
1718                 }
1719         }
1720
1721         /* handle brightness */
1722         if (oldn->brightness_toggle != newn->brightness_toggle) {
1723                 if (oldn->brightness_level < newn->brightness_level) {
1724                         TPACPI_MAY_SEND_KEY(TP_ACPI_HOTKEYSCAN_FNHOME);
1725                 } else if (oldn->brightness_level > newn->brightness_level) {
1726                         TPACPI_MAY_SEND_KEY(TP_ACPI_HOTKEYSCAN_FNEND);
1727                 } else {
1728                         /* repeated key presses that didn't change state */
1729                         if (newn->brightness_level != 0) {
1730                                 TPACPI_MAY_SEND_KEY(TP_ACPI_HOTKEYSCAN_FNHOME);
1731                         } else {
1732                                 TPACPI_MAY_SEND_KEY(TP_ACPI_HOTKEYSCAN_FNEND);
1733                         }
1734                 }
1735         }
1736 }
1737
1738 #undef TPACPI_COMPARE_KEY
1739 #undef TPACPI_MAY_SEND_KEY
1740
1741 static int hotkey_kthread(void *data)
1742 {
1743         struct tp_nvram_state s[2];
1744         u32 mask;
1745         unsigned int si, so;
1746         unsigned long t;
1747         unsigned int change_detector, must_reset;
1748
1749         mutex_lock(&hotkey_thread_mutex);
1750
1751         if (tpacpi_lifecycle == TPACPI_LIFE_EXITING)
1752                 goto exit;
1753
1754         set_freezable();
1755
1756         so = 0;
1757         si = 1;
1758         t = 0;
1759
1760         /* Initial state for compares */
1761         mutex_lock(&hotkey_thread_data_mutex);
1762         change_detector = hotkey_config_change;
1763         mask = hotkey_source_mask & hotkey_mask;
1764         mutex_unlock(&hotkey_thread_data_mutex);
1765         hotkey_read_nvram(&s[so], mask);
1766
1767         while (!kthread_should_stop() && hotkey_poll_freq) {
1768                 if (t == 0)
1769                         t = 1000/hotkey_poll_freq;
1770                 t = msleep_interruptible(t);
1771                 if (unlikely(kthread_should_stop()))
1772                         break;
1773                 must_reset = try_to_freeze();
1774                 if (t > 0 && !must_reset)
1775                         continue;
1776
1777                 mutex_lock(&hotkey_thread_data_mutex);
1778                 if (must_reset || hotkey_config_change != change_detector) {
1779                         /* forget old state on thaw or config change */
1780                         si = so;
1781                         t = 0;
1782                         change_detector = hotkey_config_change;
1783                 }
1784                 mask = hotkey_source_mask & hotkey_mask;
1785                 mutex_unlock(&hotkey_thread_data_mutex);
1786
1787                 if (likely(mask)) {
1788                         hotkey_read_nvram(&s[si], mask);
1789                         if (likely(si != so)) {
1790                                 hotkey_compare_and_issue_event(&s[so], &s[si],
1791                                                                 mask);
1792                         }
1793                 }
1794
1795                 so = si;
1796                 si ^= 1;
1797         }
1798
1799 exit:
1800         mutex_unlock(&hotkey_thread_mutex);
1801         return 0;
1802 }
1803
1804 static void hotkey_poll_stop_sync(void)
1805 {
1806         if (tpacpi_hotkey_task) {
1807                 if (frozen(tpacpi_hotkey_task) ||
1808                     freezing(tpacpi_hotkey_task))
1809                         thaw_process(tpacpi_hotkey_task);
1810
1811                 kthread_stop(tpacpi_hotkey_task);
1812                 tpacpi_hotkey_task = NULL;
1813                 mutex_lock(&hotkey_thread_mutex);
1814                 /* at this point, the thread did exit */
1815                 mutex_unlock(&hotkey_thread_mutex);
1816         }
1817 }
1818
1819 /* call with hotkey_mutex held */
1820 static void hotkey_poll_setup(int may_warn)
1821 {
1822         if ((hotkey_source_mask & hotkey_mask) != 0 &&
1823             hotkey_poll_freq > 0 &&
1824             (tpacpi_inputdev->users > 0 || hotkey_report_mode < 2)) {
1825                 if (!tpacpi_hotkey_task) {
1826                         tpacpi_hotkey_task = kthread_run(hotkey_kthread,
1827                                         NULL, TPACPI_NVRAM_KTHREAD_NAME);
1828                         if (IS_ERR(tpacpi_hotkey_task)) {
1829                                 tpacpi_hotkey_task = NULL;
1830                                 printk(TPACPI_ERR
1831                                        "could not create kernel thread "
1832                                        "for hotkey polling\n");
1833                         }
1834                 }
1835         } else {
1836                 hotkey_poll_stop_sync();
1837                 if (may_warn &&
1838                     hotkey_source_mask != 0 && hotkey_poll_freq == 0) {
1839                         printk(TPACPI_NOTICE
1840                                 "hot keys 0x%08x require polling, "
1841                                 "which is currently disabled\n",
1842                                 hotkey_source_mask);
1843                 }
1844         }
1845 }
1846
1847 static void hotkey_poll_setup_safe(int may_warn)
1848 {
1849         mutex_lock(&hotkey_mutex);
1850         hotkey_poll_setup(may_warn);
1851         mutex_unlock(&hotkey_mutex);
1852 }
1853
1854 #else /* CONFIG_THINKPAD_ACPI_HOTKEY_POLL */
1855
1856 static void hotkey_poll_setup_safe(int __unused)
1857 {
1858 }
1859
1860 #endif /* CONFIG_THINKPAD_ACPI_HOTKEY_POLL */
1861
1862 static int hotkey_inputdev_open(struct input_dev *dev)
1863 {
1864         switch (tpacpi_lifecycle) {
1865         case TPACPI_LIFE_INIT:
1866                 /*
1867                  * hotkey_init will call hotkey_poll_setup_safe
1868                  * at the appropriate moment
1869                  */
1870                 return 0;
1871         case TPACPI_LIFE_EXITING:
1872                 return -EBUSY;
1873         case TPACPI_LIFE_RUNNING:
1874                 hotkey_poll_setup_safe(0);
1875                 return 0;
1876         }
1877
1878         /* Should only happen if tpacpi_lifecycle is corrupt */
1879         BUG();
1880         return -EBUSY;
1881 }
1882
1883 static void hotkey_inputdev_close(struct input_dev *dev)
1884 {
1885         /* disable hotkey polling when possible */
1886         if (tpacpi_lifecycle == TPACPI_LIFE_RUNNING)
1887                 hotkey_poll_setup_safe(0);
1888 }
1889
1890 /* sysfs hotkey enable ------------------------------------------------- */
1891 static ssize_t hotkey_enable_show(struct device *dev,
1892                            struct device_attribute *attr,
1893                            char *buf)
1894 {
1895         int res, status;
1896
1897         printk_deprecated_attribute("hotkey_enable",
1898                         "Hotkey reporting is always enabled");
1899
1900         res = hotkey_status_get(&status);
1901         if (res)
1902                 return res;
1903
1904         return snprintf(buf, PAGE_SIZE, "%d\n", status);
1905 }
1906
1907 static ssize_t hotkey_enable_store(struct device *dev,
1908                             struct device_attribute *attr,
1909                             const char *buf, size_t count)
1910 {
1911         unsigned long t;
1912
1913         printk_deprecated_attribute("hotkey_enable",
1914                         "Hotkeys can be disabled through hotkey_mask");
1915
1916         if (parse_strtoul(buf, 1, &t))
1917                 return -EINVAL;
1918
1919         if (t == 0)
1920                 return -EPERM;
1921
1922         return count;
1923 }
1924
1925 static struct device_attribute dev_attr_hotkey_enable =
1926         __ATTR(hotkey_enable, S_IWUSR | S_IRUGO,
1927                 hotkey_enable_show, hotkey_enable_store);
1928
1929 /* sysfs hotkey mask --------------------------------------------------- */
1930 static ssize_t hotkey_mask_show(struct device *dev,
1931                            struct device_attribute *attr,
1932                            char *buf)
1933 {
1934         int res;
1935
1936         if (mutex_lock_killable(&hotkey_mutex))
1937                 return -ERESTARTSYS;
1938         res = hotkey_mask_get();
1939         mutex_unlock(&hotkey_mutex);
1940
1941         return (res)?
1942                 res : snprintf(buf, PAGE_SIZE, "0x%08x\n", hotkey_mask);
1943 }
1944
1945 static ssize_t hotkey_mask_store(struct device *dev,
1946                             struct device_attribute *attr,
1947                             const char *buf, size_t count)
1948 {
1949         unsigned long t;
1950         int res;
1951
1952         if (parse_strtoul(buf, 0xffffffffUL, &t))
1953                 return -EINVAL;
1954
1955         if (mutex_lock_killable(&hotkey_mutex))
1956                 return -ERESTARTSYS;
1957
1958         res = hotkey_mask_set(t);
1959
1960 #ifdef CONFIG_THINKPAD_ACPI_HOTKEY_POLL
1961         hotkey_poll_setup(1);
1962 #endif
1963
1964         mutex_unlock(&hotkey_mutex);
1965
1966         tpacpi_disclose_usertask("hotkey_mask", "set to 0x%08lx\n", t);
1967
1968         return (res) ? res : count;
1969 }
1970
1971 static struct device_attribute dev_attr_hotkey_mask =
1972         __ATTR(hotkey_mask, S_IWUSR | S_IRUGO,
1973                 hotkey_mask_show, hotkey_mask_store);
1974
1975 /* sysfs hotkey bios_enabled ------------------------------------------- */
1976 static ssize_t hotkey_bios_enabled_show(struct device *dev,
1977                            struct device_attribute *attr,
1978                            char *buf)
1979 {
1980         return sprintf(buf, "0\n");
1981 }
1982
1983 static struct device_attribute dev_attr_hotkey_bios_enabled =
1984         __ATTR(hotkey_bios_enabled, S_IRUGO, hotkey_bios_enabled_show, NULL);
1985
1986 /* sysfs hotkey bios_mask ---------------------------------------------- */
1987 static ssize_t hotkey_bios_mask_show(struct device *dev,
1988                            struct device_attribute *attr,
1989                            char *buf)
1990 {
1991         return snprintf(buf, PAGE_SIZE, "0x%08x\n", hotkey_orig_mask);
1992 }
1993
1994 static struct device_attribute dev_attr_hotkey_bios_mask =
1995         __ATTR(hotkey_bios_mask, S_IRUGO, hotkey_bios_mask_show, NULL);
1996
1997 /* sysfs hotkey all_mask ----------------------------------------------- */
1998 static ssize_t hotkey_all_mask_show(struct device *dev,
1999                            struct device_attribute *attr,
2000                            char *buf)
2001 {
2002         return snprintf(buf, PAGE_SIZE, "0x%08x\n",
2003                                 hotkey_all_mask | hotkey_source_mask);
2004 }
2005
2006 static struct device_attribute dev_attr_hotkey_all_mask =
2007         __ATTR(hotkey_all_mask, S_IRUGO, hotkey_all_mask_show, NULL);
2008
2009 /* sysfs hotkey recommended_mask --------------------------------------- */
2010 static ssize_t hotkey_recommended_mask_show(struct device *dev,
2011                                             struct device_attribute *attr,
2012                                             char *buf)
2013 {
2014         return snprintf(buf, PAGE_SIZE, "0x%08x\n",
2015                         (hotkey_all_mask | hotkey_source_mask)
2016                         & ~hotkey_reserved_mask);
2017 }
2018
2019 static struct device_attribute dev_attr_hotkey_recommended_mask =
2020         __ATTR(hotkey_recommended_mask, S_IRUGO,
2021                 hotkey_recommended_mask_show, NULL);
2022
2023 #ifdef CONFIG_THINKPAD_ACPI_HOTKEY_POLL
2024
2025 /* sysfs hotkey hotkey_source_mask ------------------------------------- */
2026 static ssize_t hotkey_source_mask_show(struct device *dev,
2027                            struct device_attribute *attr,
2028                            char *buf)
2029 {
2030         return snprintf(buf, PAGE_SIZE, "0x%08x\n", hotkey_source_mask);
2031 }
2032
2033 static ssize_t hotkey_source_mask_store(struct device *dev,
2034                             struct device_attribute *attr,
2035                             const char *buf, size_t count)
2036 {
2037         unsigned long t;
2038
2039         if (parse_strtoul(buf, 0xffffffffUL, &t) ||
2040                 ((t & ~TPACPI_HKEY_NVRAM_KNOWN_MASK) != 0))
2041                 return -EINVAL;
2042
2043         if (mutex_lock_killable(&hotkey_mutex))
2044                 return -ERESTARTSYS;
2045
2046         HOTKEY_CONFIG_CRITICAL_START
2047         hotkey_source_mask = t;
2048         HOTKEY_CONFIG_CRITICAL_END
2049
2050         hotkey_poll_setup(1);
2051
2052         mutex_unlock(&hotkey_mutex);
2053
2054         tpacpi_disclose_usertask("hotkey_source_mask", "set to 0x%08lx\n", t);
2055
2056         return count;
2057 }
2058
2059 static struct device_attribute dev_attr_hotkey_source_mask =
2060         __ATTR(hotkey_source_mask, S_IWUSR | S_IRUGO,
2061                 hotkey_source_mask_show, hotkey_source_mask_store);
2062
2063 /* sysfs hotkey hotkey_poll_freq --------------------------------------- */
2064 static ssize_t hotkey_poll_freq_show(struct device *dev,
2065                            struct device_attribute *attr,
2066                            char *buf)
2067 {
2068         return snprintf(buf, PAGE_SIZE, "%d\n", hotkey_poll_freq);
2069 }
2070
2071 static ssize_t hotkey_poll_freq_store(struct device *dev,
2072                             struct device_attribute *attr,
2073                             const char *buf, size_t count)
2074 {
2075         unsigned long t;
2076
2077         if (parse_strtoul(buf, 25, &t))
2078                 return -EINVAL;
2079
2080         if (mutex_lock_killable(&hotkey_mutex))
2081                 return -ERESTARTSYS;
2082
2083         hotkey_poll_freq = t;
2084
2085         hotkey_poll_setup(1);
2086         mutex_unlock(&hotkey_mutex);
2087
2088         tpacpi_disclose_usertask("hotkey_poll_freq", "set to %lu\n", t);
2089
2090         return count;
2091 }
2092
2093 static struct device_attribute dev_attr_hotkey_poll_freq =
2094         __ATTR(hotkey_poll_freq, S_IWUSR | S_IRUGO,
2095                 hotkey_poll_freq_show, hotkey_poll_freq_store);
2096
2097 #endif /* CONFIG_THINKPAD_ACPI_HOTKEY_POLL */
2098
2099 /* sysfs hotkey radio_sw (pollable) ------------------------------------ */
2100 static ssize_t hotkey_radio_sw_show(struct device *dev,
2101                            struct device_attribute *attr,
2102                            char *buf)
2103 {
2104         int res, s;
2105         res = hotkey_get_wlsw(&s);
2106         if (res < 0)
2107                 return res;
2108
2109         return snprintf(buf, PAGE_SIZE, "%d\n", !!s);
2110 }
2111
2112 static struct device_attribute dev_attr_hotkey_radio_sw =
2113         __ATTR(hotkey_radio_sw, S_IRUGO, hotkey_radio_sw_show, NULL);
2114
2115 static void hotkey_radio_sw_notify_change(void)
2116 {
2117         if (tp_features.hotkey_wlsw)
2118                 sysfs_notify(&tpacpi_pdev->dev.kobj, NULL,
2119                              "hotkey_radio_sw");
2120 }
2121
2122 /* sysfs hotkey tablet mode (pollable) --------------------------------- */
2123 static ssize_t hotkey_tablet_mode_show(struct device *dev,
2124                            struct device_attribute *attr,
2125                            char *buf)
2126 {
2127         int res, s;
2128         res = hotkey_get_tablet_mode(&s);
2129         if (res < 0)
2130                 return res;
2131
2132         return snprintf(buf, PAGE_SIZE, "%d\n", !!s);
2133 }
2134
2135 static struct device_attribute dev_attr_hotkey_tablet_mode =
2136         __ATTR(hotkey_tablet_mode, S_IRUGO, hotkey_tablet_mode_show, NULL);
2137
2138 static void hotkey_tablet_mode_notify_change(void)
2139 {
2140         if (tp_features.hotkey_tablet)
2141                 sysfs_notify(&tpacpi_pdev->dev.kobj, NULL,
2142                              "hotkey_tablet_mode");
2143 }
2144
2145 /* sysfs hotkey report_mode -------------------------------------------- */
2146 static ssize_t hotkey_report_mode_show(struct device *dev,
2147                            struct device_attribute *attr,
2148                            char *buf)
2149 {
2150         return snprintf(buf, PAGE_SIZE, "%d\n",
2151                 (hotkey_report_mode != 0) ? hotkey_report_mode : 1);
2152 }
2153
2154 static struct device_attribute dev_attr_hotkey_report_mode =
2155         __ATTR(hotkey_report_mode, S_IRUGO, hotkey_report_mode_show, NULL);
2156
2157 /* sysfs wakeup reason (pollable) -------------------------------------- */
2158 static ssize_t hotkey_wakeup_reason_show(struct device *dev,
2159                            struct device_attribute *attr,
2160                            char *buf)
2161 {
2162         return snprintf(buf, PAGE_SIZE, "%d\n", hotkey_wakeup_reason);
2163 }
2164
2165 static struct device_attribute dev_attr_hotkey_wakeup_reason =
2166         __ATTR(wakeup_reason, S_IRUGO, hotkey_wakeup_reason_show, NULL);
2167
2168 static void hotkey_wakeup_reason_notify_change(void)
2169 {
2170         if (tp_features.hotkey_mask)
2171                 sysfs_notify(&tpacpi_pdev->dev.kobj, NULL,
2172                              "wakeup_reason");
2173 }
2174
2175 /* sysfs wakeup hotunplug_complete (pollable) -------------------------- */
2176 static ssize_t hotkey_wakeup_hotunplug_complete_show(struct device *dev,
2177                            struct device_attribute *attr,
2178                            char *buf)
2179 {
2180         return snprintf(buf, PAGE_SIZE, "%d\n", hotkey_autosleep_ack);
2181 }
2182
2183 static struct device_attribute dev_attr_hotkey_wakeup_hotunplug_complete =
2184         __ATTR(wakeup_hotunplug_complete, S_IRUGO,
2185                hotkey_wakeup_hotunplug_complete_show, NULL);
2186
2187 static void hotkey_wakeup_hotunplug_complete_notify_change(void)
2188 {
2189         if (tp_features.hotkey_mask)
2190                 sysfs_notify(&tpacpi_pdev->dev.kobj, NULL,
2191                              "wakeup_hotunplug_complete");
2192 }
2193
2194 /* --------------------------------------------------------------------- */
2195
2196 static struct attribute *hotkey_attributes[] __initdata = {
2197         &dev_attr_hotkey_enable.attr,
2198         &dev_attr_hotkey_bios_enabled.attr,
2199         &dev_attr_hotkey_report_mode.attr,
2200 #ifdef CONFIG_THINKPAD_ACPI_HOTKEY_POLL
2201         &dev_attr_hotkey_mask.attr,
2202         &dev_attr_hotkey_all_mask.attr,
2203         &dev_attr_hotkey_recommended_mask.attr,
2204         &dev_attr_hotkey_source_mask.attr,
2205         &dev_attr_hotkey_poll_freq.attr,
2206 #endif
2207 };
2208
2209 static struct attribute *hotkey_mask_attributes[] __initdata = {
2210         &dev_attr_hotkey_bios_mask.attr,
2211 #ifndef CONFIG_THINKPAD_ACPI_HOTKEY_POLL
2212         &dev_attr_hotkey_mask.attr,
2213         &dev_attr_hotkey_all_mask.attr,
2214         &dev_attr_hotkey_recommended_mask.attr,
2215 #endif
2216         &dev_attr_hotkey_wakeup_reason.attr,
2217         &dev_attr_hotkey_wakeup_hotunplug_complete.attr,
2218 };
2219
2220 static void bluetooth_update_rfk(void);
2221 static void wan_update_rfk(void);
2222 static void uwb_update_rfk(void);
2223 static void tpacpi_send_radiosw_update(void)
2224 {
2225         int wlsw;
2226
2227         /* Sync these BEFORE sending any rfkill events */
2228         if (tp_features.bluetooth)
2229                 bluetooth_update_rfk();
2230         if (tp_features.wan)
2231                 wan_update_rfk();
2232         if (tp_features.uwb)
2233                 uwb_update_rfk();
2234
2235         if (tp_features.hotkey_wlsw && !hotkey_get_wlsw(&wlsw)) {
2236                 mutex_lock(&tpacpi_inputdev_send_mutex);
2237
2238                 input_report_switch(tpacpi_inputdev,
2239                                     SW_RFKILL_ALL, !!wlsw);
2240                 input_sync(tpacpi_inputdev);
2241
2242                 mutex_unlock(&tpacpi_inputdev_send_mutex);
2243         }
2244         hotkey_radio_sw_notify_change();
2245 }
2246
2247 static void hotkey_exit(void)
2248 {
2249 #ifdef CONFIG_THINKPAD_ACPI_HOTKEY_POLL
2250         hotkey_poll_stop_sync();
2251 #endif
2252
2253         if (hotkey_dev_attributes)
2254                 delete_attr_set(hotkey_dev_attributes, &tpacpi_pdev->dev.kobj);
2255
2256         kfree(hotkey_keycode_map);
2257
2258         if (tp_features.hotkey) {
2259                 dbg_printk(TPACPI_DBG_EXIT | TPACPI_DBG_HKEY,
2260                            "restoring original hot key mask\n");
2261                 /* no short-circuit boolean operator below! */
2262                 if ((hotkey_mask_set(hotkey_orig_mask) |
2263                      hotkey_status_set(false)) != 0)
2264                         printk(TPACPI_ERR
2265                                "failed to restore hot key mask "
2266                                "to BIOS defaults\n");
2267         }
2268 }
2269
2270 static int __init hotkey_init(struct ibm_init_struct *iibm)
2271 {
2272         /* Requirements for changing the default keymaps:
2273          *
2274          * 1. Many of the keys are mapped to KEY_RESERVED for very
2275          *    good reasons.  Do not change them unless you have deep
2276          *    knowledge on the IBM and Lenovo ThinkPad firmware for
2277          *    the various ThinkPad models.  The driver behaves
2278          *    differently for KEY_RESERVED: such keys have their
2279          *    hot key mask *unset* in mask_recommended, and also
2280          *    in the initial hot key mask programmed into the
2281          *    firmware at driver load time, which means the firm-
2282          *    ware may react very differently if you change them to
2283          *    something else;
2284          *
2285          * 2. You must be subscribed to the linux-thinkpad and
2286          *    ibm-acpi-devel mailing lists, and you should read the
2287          *    list archives since 2007 if you want to change the
2288          *    keymaps.  This requirement exists so that you will
2289          *    know the past history of problems with the thinkpad-
2290          *    acpi driver keymaps, and also that you will be
2291          *    listening to any bug reports;
2292          *
2293          * 3. Do not send thinkpad-acpi specific patches directly to
2294          *    for merging, *ever*.  Send them to the linux-acpi
2295          *    mailinglist for comments.  Merging is to be done only
2296          *    through acpi-test and the ACPI maintainer.
2297          *
2298          * If the above is too much to ask, don't change the keymap.
2299          * Ask the thinkpad-acpi maintainer to do it, instead.
2300          */
2301         static u16 ibm_keycode_map[] __initdata = {
2302                 /* Scan Codes 0x00 to 0x0B: ACPI HKEY FN+F1..F12 */
2303                 KEY_FN_F1,      KEY_FN_F2,      KEY_COFFEE,     KEY_SLEEP,
2304                 KEY_WLAN,       KEY_FN_F6, KEY_SWITCHVIDEOMODE, KEY_FN_F8,
2305                 KEY_FN_F9,      KEY_FN_F10,     KEY_FN_F11,     KEY_SUSPEND,
2306
2307                 /* Scan codes 0x0C to 0x1F: Other ACPI HKEY hot keys */
2308                 KEY_UNKNOWN,    /* 0x0C: FN+BACKSPACE */
2309                 KEY_UNKNOWN,    /* 0x0D: FN+INSERT */
2310                 KEY_UNKNOWN,    /* 0x0E: FN+DELETE */
2311
2312                 /* brightness: firmware always reacts to them, unless
2313                  * X.org did some tricks in the radeon BIOS scratch
2314                  * registers of *some* models */
2315                 KEY_RESERVED,   /* 0x0F: FN+HOME (brightness up) */
2316                 KEY_RESERVED,   /* 0x10: FN+END (brightness down) */
2317
2318                 /* Thinklight: firmware always react to it */
2319                 KEY_RESERVED,   /* 0x11: FN+PGUP (thinklight toggle) */
2320
2321                 KEY_UNKNOWN,    /* 0x12: FN+PGDOWN */
2322                 KEY_ZOOM,       /* 0x13: FN+SPACE (zoom) */
2323
2324                 /* Volume: firmware always react to it and reprograms
2325                  * the built-in *extra* mixer.  Never map it to control
2326                  * another mixer by default. */
2327                 KEY_RESERVED,   /* 0x14: VOLUME UP */
2328                 KEY_RESERVED,   /* 0x15: VOLUME DOWN */
2329                 KEY_RESERVED,   /* 0x16: MUTE */
2330
2331                 KEY_VENDOR,     /* 0x17: Thinkpad/AccessIBM/Lenovo */
2332
2333                 /* (assignments unknown, please report if found) */
2334                 KEY_UNKNOWN, KEY_UNKNOWN, KEY_UNKNOWN, KEY_UNKNOWN,
2335                 KEY_UNKNOWN, KEY_UNKNOWN, KEY_UNKNOWN, KEY_UNKNOWN,
2336         };
2337         static u16 lenovo_keycode_map[] __initdata = {
2338                 /* Scan Codes 0x00 to 0x0B: ACPI HKEY FN+F1..F12 */
2339                 KEY_FN_F1,      KEY_COFFEE,     KEY_BATTERY,    KEY_SLEEP,
2340                 KEY_WLAN,       KEY_FN_F6, KEY_SWITCHVIDEOMODE, KEY_FN_F8,
2341                 KEY_FN_F9,      KEY_FN_F10,     KEY_FN_F11,     KEY_SUSPEND,
2342
2343                 /* Scan codes 0x0C to 0x1F: Other ACPI HKEY hot keys */
2344                 KEY_UNKNOWN,    /* 0x0C: FN+BACKSPACE */
2345                 KEY_UNKNOWN,    /* 0x0D: FN+INSERT */
2346                 KEY_UNKNOWN,    /* 0x0E: FN+DELETE */
2347
2348                 /* These either have to go through ACPI video, or
2349                  * act like in the IBM ThinkPads, so don't ever
2350                  * enable them by default */
2351                 KEY_RESERVED,   /* 0x0F: FN+HOME (brightness up) */
2352                 KEY_RESERVED,   /* 0x10: FN+END (brightness down) */
2353
2354                 KEY_RESERVED,   /* 0x11: FN+PGUP (thinklight toggle) */
2355
2356                 KEY_UNKNOWN,    /* 0x12: FN+PGDOWN */
2357                 KEY_ZOOM,       /* 0x13: FN+SPACE (zoom) */
2358
2359                 /* Volume: z60/z61, T60 (BIOS version?): firmware always
2360                  * react to it and reprograms the built-in *extra* mixer.
2361                  * Never map it to control another mixer by default.
2362                  *
2363                  * T60?, T61, R60?, R61: firmware and EC tries to send
2364                  * these over the regular keyboard, so these are no-ops,
2365                  * but there are still weird bugs re. MUTE, so do not
2366                  * change unless you get test reports from all Lenovo
2367                  * models.  May cause the BIOS to interfere with the
2368                  * HDA mixer.
2369                  */
2370                 KEY_RESERVED,   /* 0x14: VOLUME UP */
2371                 KEY_RESERVED,   /* 0x15: VOLUME DOWN */
2372                 KEY_RESERVED,   /* 0x16: MUTE */
2373
2374                 KEY_VENDOR,     /* 0x17: Thinkpad/AccessIBM/Lenovo */
2375
2376                 /* (assignments unknown, please report if found) */
2377                 KEY_UNKNOWN, KEY_UNKNOWN, KEY_UNKNOWN, KEY_UNKNOWN,
2378                 KEY_UNKNOWN, KEY_UNKNOWN, KEY_UNKNOWN, KEY_UNKNOWN,
2379         };
2380
2381 #define TPACPI_HOTKEY_MAP_LEN           ARRAY_SIZE(ibm_keycode_map)
2382 #define TPACPI_HOTKEY_MAP_SIZE          sizeof(ibm_keycode_map)
2383 #define TPACPI_HOTKEY_MAP_TYPESIZE      sizeof(ibm_keycode_map[0])
2384
2385         int res, i;
2386         int status;
2387         int hkeyv;
2388
2389         vdbg_printk(TPACPI_DBG_INIT | TPACPI_DBG_HKEY,
2390                         "initializing hotkey subdriver\n");
2391
2392         BUG_ON(!tpacpi_inputdev);
2393         BUG_ON(tpacpi_inputdev->open != NULL ||
2394                tpacpi_inputdev->close != NULL);
2395
2396         TPACPI_ACPIHANDLE_INIT(hkey);
2397         mutex_init(&hotkey_mutex);
2398
2399 #ifdef CONFIG_THINKPAD_ACPI_HOTKEY_POLL
2400         mutex_init(&hotkey_thread_mutex);
2401         mutex_init(&hotkey_thread_data_mutex);
2402 #endif
2403
2404         /* hotkey not supported on 570 */
2405         tp_features.hotkey = hkey_handle != NULL;
2406
2407         vdbg_printk(TPACPI_DBG_INIT | TPACPI_DBG_HKEY,
2408                 "hotkeys are %s\n",
2409                 str_supported(tp_features.hotkey));
2410
2411         if (!tp_features.hotkey)
2412                 return 1;
2413
2414         tpacpi_disable_brightness_delay();
2415
2416         hotkey_dev_attributes = create_attr_set(13, NULL);
2417         if (!hotkey_dev_attributes)
2418                 return -ENOMEM;
2419         res = add_many_to_attr_set(hotkey_dev_attributes,
2420                         hotkey_attributes,
2421                         ARRAY_SIZE(hotkey_attributes));
2422         if (res)
2423                 goto err_exit;
2424
2425         /* mask not supported on 570, 600e/x, 770e, 770x, A21e, A2xm/p,
2426            A30, R30, R31, T20-22, X20-21, X22-24.  Detected by checking
2427            for HKEY interface version 0x100 */
2428         if (acpi_evalf(hkey_handle, &hkeyv, "MHKV", "qd")) {
2429                 if ((hkeyv >> 8) != 1) {
2430                         printk(TPACPI_ERR "unknown version of the "
2431                                "HKEY interface: 0x%x\n", hkeyv);
2432                         printk(TPACPI_ERR "please report this to %s\n",
2433                                TPACPI_MAIL);
2434                 } else {
2435                         /*
2436                          * MHKV 0x100 in A31, R40, R40e,
2437                          * T4x, X31, and later
2438                          */
2439                         tp_features.hotkey_mask = 1;
2440                         vdbg_printk(TPACPI_DBG_INIT | TPACPI_DBG_HKEY,
2441                                 "firmware HKEY interface version: 0x%x\n",
2442                                 hkeyv);
2443                 }
2444         }
2445
2446         vdbg_printk(TPACPI_DBG_INIT | TPACPI_DBG_HKEY,
2447                 "hotkey masks are %s\n",
2448                 str_supported(tp_features.hotkey_mask));
2449
2450         if (tp_features.hotkey_mask) {
2451                 if (!acpi_evalf(hkey_handle, &hotkey_all_mask,
2452                                 "MHKA", "qd")) {
2453                         printk(TPACPI_ERR
2454                                "missing MHKA handler, "
2455                                "please report this to %s\n",
2456                                TPACPI_MAIL);
2457                         /* FN+F12, FN+F4, FN+F3 */
2458                         hotkey_all_mask = 0x080cU;
2459                 }
2460         }
2461
2462         /* hotkey_source_mask *must* be zero for
2463          * the first hotkey_mask_get */
2464         if (tp_features.hotkey_mask) {
2465                 res = hotkey_mask_get();
2466                 if (res)
2467                         goto err_exit;
2468
2469                 hotkey_orig_mask = hotkey_mask;
2470                 res = add_many_to_attr_set(
2471                                 hotkey_dev_attributes,
2472                                 hotkey_mask_attributes,
2473                                 ARRAY_SIZE(hotkey_mask_attributes));
2474                 if (res)
2475                         goto err_exit;
2476         }
2477
2478 #ifdef CONFIG_THINKPAD_ACPI_HOTKEY_POLL
2479         if (tp_features.hotkey_mask) {
2480                 hotkey_source_mask = TPACPI_HKEY_NVRAM_GOOD_MASK
2481                                         & ~hotkey_all_mask;
2482         } else {
2483                 hotkey_source_mask = TPACPI_HKEY_NVRAM_GOOD_MASK;
2484         }
2485
2486         vdbg_printk(TPACPI_DBG_INIT | TPACPI_DBG_HKEY,
2487                     "hotkey source mask 0x%08x, polling freq %d\n",
2488                     hotkey_source_mask, hotkey_poll_freq);
2489 #endif
2490
2491 #ifdef CONFIG_THINKPAD_ACPI_DEBUGFACILITIES
2492         if (dbg_wlswemul) {
2493                 tp_features.hotkey_wlsw = 1;
2494                 printk(TPACPI_INFO
2495                         "radio switch emulation enabled\n");
2496         } else
2497 #endif
2498         /* Not all thinkpads have a hardware radio switch */
2499         if (acpi_evalf(hkey_handle, &status, "WLSW", "qd")) {
2500                 tp_features.hotkey_wlsw = 1;
2501                 printk(TPACPI_INFO
2502                         "radio switch found; radios are %s\n",
2503                         enabled(status, 0));
2504         }
2505         if (tp_features.hotkey_wlsw)
2506                 res = add_to_attr_set(hotkey_dev_attributes,
2507                                 &dev_attr_hotkey_radio_sw.attr);
2508
2509         /* For X41t, X60t, X61t Tablets... */
2510         if (!res && acpi_evalf(hkey_handle, &status, "MHKG", "qd")) {
2511                 tp_features.hotkey_tablet = 1;
2512                 printk(TPACPI_INFO
2513                         "possible tablet mode switch found; "
2514                         "ThinkPad in %s mode\n",
2515                         (status & TP_HOTKEY_TABLET_MASK)?
2516                                 "tablet" : "laptop");
2517                 res = add_to_attr_set(hotkey_dev_attributes,
2518                                 &dev_attr_hotkey_tablet_mode.attr);
2519         }
2520
2521         if (!res)
2522                 res = register_attr_set_with_sysfs(
2523                                 hotkey_dev_attributes,
2524                                 &tpacpi_pdev->dev.kobj);
2525         if (res)
2526                 goto err_exit;
2527
2528         /* Set up key map */
2529
2530         hotkey_keycode_map = kmalloc(TPACPI_HOTKEY_MAP_SIZE,
2531                                         GFP_KERNEL);
2532         if (!hotkey_keycode_map) {
2533                 printk(TPACPI_ERR
2534                         "failed to allocate memory for key map\n");
2535                 res = -ENOMEM;
2536                 goto err_exit;
2537         }
2538
2539         if (thinkpad_id.vendor == PCI_VENDOR_ID_LENOVO) {
2540                 dbg_printk(TPACPI_DBG_INIT | TPACPI_DBG_HKEY,
2541                            "using Lenovo default hot key map\n");
2542                 memcpy(hotkey_keycode_map, &lenovo_keycode_map,
2543                         TPACPI_HOTKEY_MAP_SIZE);
2544         } else {
2545                 dbg_printk(TPACPI_DBG_INIT | TPACPI_DBG_HKEY,
2546                            "using IBM default hot key map\n");
2547                 memcpy(hotkey_keycode_map, &ibm_keycode_map,
2548                         TPACPI_HOTKEY_MAP_SIZE);
2549         }
2550
2551         set_bit(EV_KEY, tpacpi_inputdev->evbit);
2552         set_bit(EV_MSC, tpacpi_inputdev->evbit);
2553         set_bit(MSC_SCAN, tpacpi_inputdev->mscbit);
2554         tpacpi_inputdev->keycodesize = TPACPI_HOTKEY_MAP_TYPESIZE;
2555         tpacpi_inputdev->keycodemax = TPACPI_HOTKEY_MAP_LEN;
2556         tpacpi_inputdev->keycode = hotkey_keycode_map;
2557         for (i = 0; i < TPACPI_HOTKEY_MAP_LEN; i++) {
2558                 if (hotkey_keycode_map[i] != KEY_RESERVED) {
2559                         set_bit(hotkey_keycode_map[i],
2560                                 tpacpi_inputdev->keybit);
2561                 } else {
2562                         if (i < sizeof(hotkey_reserved_mask)*8)
2563                                 hotkey_reserved_mask |= 1 << i;
2564                 }
2565         }
2566
2567         if (tp_features.hotkey_wlsw) {
2568                 set_bit(EV_SW, tpacpi_inputdev->evbit);
2569                 set_bit(SW_RFKILL_ALL, tpacpi_inputdev->swbit);
2570         }
2571         if (tp_features.hotkey_tablet) {
2572                 set_bit(EV_SW, tpacpi_inputdev->evbit);
2573                 set_bit(SW_TABLET_MODE, tpacpi_inputdev->swbit);
2574         }
2575
2576         /* Do not issue duplicate brightness change events to
2577          * userspace */
2578         if (!tp_features.bright_acpimode)
2579                 /* update bright_acpimode... */
2580                 tpacpi_check_std_acpi_brightness_support();
2581
2582         if (tp_features.bright_acpimode) {
2583                 printk(TPACPI_INFO
2584                        "This ThinkPad has standard ACPI backlight "
2585                        "brightness control, supported by the ACPI "
2586                        "video driver\n");
2587                 printk(TPACPI_NOTICE
2588                        "Disabling thinkpad-acpi brightness events "
2589                        "by default...\n");
2590
2591                 /* The hotkey_reserved_mask change below is not
2592                  * necessary while the keys are at KEY_RESERVED in the
2593                  * default map, but better safe than sorry, leave it
2594                  * here as a marker of what we have to do, especially
2595                  * when we finally become able to set this at runtime
2596                  * on response to X.org requests */
2597                 hotkey_reserved_mask |=
2598                         (1 << TP_ACPI_HOTKEYSCAN_FNHOME)
2599                         | (1 << TP_ACPI_HOTKEYSCAN_FNEND);
2600         }
2601
2602         dbg_printk(TPACPI_DBG_INIT | TPACPI_DBG_HKEY,
2603                         "enabling firmware HKEY event interface...\n");
2604         res = hotkey_status_set(true);
2605         if (res) {
2606                 hotkey_exit();
2607                 return res;
2608         }
2609         res = hotkey_mask_set(((hotkey_all_mask | hotkey_source_mask)
2610                                 & ~hotkey_reserved_mask)
2611                                 | hotkey_orig_mask);
2612         if (res < 0 && res != -ENXIO) {
2613                 hotkey_exit();
2614                 return res;
2615         }
2616
2617         dbg_printk(TPACPI_DBG_INIT | TPACPI_DBG_HKEY,
2618                         "legacy ibm/hotkey event reporting over procfs %s\n",
2619                         (hotkey_report_mode < 2) ?
2620                                 "enabled" : "disabled");
2621
2622         tpacpi_inputdev->open = &hotkey_inputdev_open;
2623         tpacpi_inputdev->close = &hotkey_inputdev_close;
2624
2625         hotkey_poll_setup_safe(1);
2626         tpacpi_send_radiosw_update();
2627         tpacpi_input_send_tabletsw();
2628
2629         return 0;
2630
2631 err_exit:
2632         delete_attr_set(hotkey_dev_attributes, &tpacpi_pdev->dev.kobj);
2633         hotkey_dev_attributes = NULL;
2634
2635         return (res < 0)? res : 1;
2636 }
2637
2638 static bool hotkey_notify_hotkey(const u32 hkey,
2639                                  bool *send_acpi_ev,
2640                                  bool *ignore_acpi_ev)
2641 {
2642         /* 0x1000-0x1FFF: key presses */
2643         unsigned int scancode = hkey & 0xfff;
2644         *send_acpi_ev = true;
2645         *ignore_acpi_ev = false;
2646
2647         if (scancode > 0 && scancode < 0x21) {
2648                 scancode--;
2649                 if (!(hotkey_source_mask & (1 << scancode))) {
2650                         tpacpi_input_send_key(scancode);
2651                         *send_acpi_ev = false;
2652                 } else {
2653                         *ignore_acpi_ev = true;
2654                 }
2655                 return true;
2656         }
2657         return false;
2658 }
2659
2660 static bool hotkey_notify_wakeup(const u32 hkey,
2661                                  bool *send_acpi_ev,
2662                                  bool *ignore_acpi_ev)
2663 {
2664         /* 0x2000-0x2FFF: Wakeup reason */
2665         *send_acpi_ev = true;
2666         *ignore_acpi_ev = false;
2667
2668         switch (hkey) {
2669         case 0x2304: /* suspend, undock */
2670         case 0x2404: /* hibernation, undock */
2671                 hotkey_wakeup_reason = TP_ACPI_WAKEUP_UNDOCK;
2672                 *ignore_acpi_ev = true;
2673                 break;
2674
2675         case 0x2305: /* suspend, bay eject */
2676         case 0x2405: /* hibernation, bay eject */
2677                 hotkey_wakeup_reason = TP_ACPI_WAKEUP_BAYEJ;
2678                 *ignore_acpi_ev = true;
2679                 break;
2680
2681         case 0x2313: /* Battery on critical low level (S3) */
2682         case 0x2413: /* Battery on critical low level (S4) */
2683                 printk(TPACPI_ALERT
2684                         "EMERGENCY WAKEUP: battery almost empty\n");
2685                 /* how to auto-heal: */
2686                 /* 2313: woke up from S3, go to S4/S5 */
2687                 /* 2413: woke up from S4, go to S5 */
2688                 break;
2689
2690         default:
2691                 return false;
2692         }
2693
2694         if (hotkey_wakeup_reason != TP_ACPI_WAKEUP_NONE) {
2695                 printk(TPACPI_INFO
2696                        "woke up due to a hot-unplug "
2697                        "request...\n");
2698                 hotkey_wakeup_reason_notify_change();
2699         }
2700         return true;
2701 }
2702
2703 static bool hotkey_notify_usrevent(const u32 hkey,
2704                                  bool *send_acpi_ev,
2705                                  bool *ignore_acpi_ev)
2706 {
2707         /* 0x5000-0x5FFF: human interface helpers */
2708         *send_acpi_ev = true;
2709         *ignore_acpi_ev = false;
2710
2711         switch (hkey) {
2712         case 0x5010: /* Lenovo new BIOS: brightness changed */
2713         case 0x500b: /* X61t: tablet pen inserted into bay */
2714         case 0x500c: /* X61t: tablet pen removed from bay */
2715                 return true;
2716
2717         case 0x5009: /* X41t-X61t: swivel up (tablet mode) */
2718         case 0x500a: /* X41t-X61t: swivel down (normal mode) */
2719                 tpacpi_input_send_tabletsw();
2720                 hotkey_tablet_mode_notify_change();
2721                 *send_acpi_ev = false;
2722                 return true;
2723
2724         case 0x5001:
2725         case 0x5002:
2726                 /* LID switch events.  Do not propagate */
2727                 *ignore_acpi_ev = true;
2728                 return true;
2729
2730         default:
2731                 return false;
2732         }
2733 }
2734
2735 static bool hotkey_notify_thermal(const u32 hkey,
2736                                  bool *send_acpi_ev,
2737                                  bool *ignore_acpi_ev)
2738 {
2739         /* 0x6000-0x6FFF: thermal alarms */
2740         *send_acpi_ev = true;
2741         *ignore_acpi_ev = false;
2742
2743         switch (hkey) {
2744         case 0x6011:
2745                 printk(TPACPI_CRIT
2746                         "THERMAL ALARM: battery is too hot!\n");
2747                 /* recommended action: warn user through gui */
2748                 return true;
2749         case 0x6012:
2750                 printk(TPACPI_ALERT
2751                         "THERMAL EMERGENCY: battery is extremely hot!\n");
2752                 /* recommended action: immediate sleep/hibernate */
2753                 return true;
2754         case 0x6021:
2755                 printk(TPACPI_CRIT
2756                         "THERMAL ALARM: "
2757                         "a sensor reports something is too hot!\n");
2758                 /* recommended action: warn user through gui, that */
2759                 /* some internal component is too hot */
2760                 return true;
2761         case 0x6022:
2762                 printk(TPACPI_ALERT
2763                         "THERMAL EMERGENCY: "
2764                         "a sensor reports something is extremely hot!\n");
2765                 /* recommended action: immediate sleep/hibernate */
2766                 return true;
2767         case 0x6030:
2768                 printk(TPACPI_INFO
2769                         "EC reports that Thermal Table has changed\n");
2770                 /* recommended action: do nothing, we don't have
2771                  * Lenovo ATM information */
2772                 return true;
2773         default:
2774                 printk(TPACPI_ALERT
2775                          "THERMAL ALERT: unknown thermal alarm received\n");
2776                 return false;
2777         }
2778 }
2779
2780 static void hotkey_notify(struct ibm_struct *ibm, u32 event)
2781 {
2782         u32 hkey;
2783         bool send_acpi_ev;
2784         bool ignore_acpi_ev;
2785         bool known_ev;
2786
2787         if (event != 0x80) {
2788                 printk(TPACPI_ERR
2789                        "unknown HKEY notification event %d\n", event);
2790                 /* forward it to userspace, maybe it knows how to handle it */
2791                 acpi_bus_generate_netlink_event(
2792                                         ibm->acpi->device->pnp.device_class,
2793                                         dev_name(&ibm->acpi->device->dev),
2794                                         event, 0);
2795                 return;
2796         }
2797
2798         while (1) {
2799                 if (!acpi_evalf(hkey_handle, &hkey, "MHKP", "d")) {
2800                         printk(TPACPI_ERR "failed to retrieve HKEY event\n");
2801                         return;
2802                 }
2803
2804                 if (hkey == 0) {
2805                         /* queue empty */
2806                         return;
2807                 }
2808
2809                 send_acpi_ev = true;
2810                 ignore_acpi_ev = false;
2811
2812                 switch (hkey >> 12) {
2813                 case 1:
2814                         /* 0x1000-0x1FFF: key presses */
2815                         known_ev = hotkey_notify_hotkey(hkey, &send_acpi_ev,
2816                                                  &ignore_acpi_ev);
2817                         break;
2818                 case 2:
2819                         /* 0x2000-0x2FFF: Wakeup reason */
2820                         known_ev = hotkey_notify_wakeup(hkey, &send_acpi_ev,
2821                                                  &ignore_acpi_ev);
2822                         break;
2823                 case 3:
2824                         /* 0x3000-0x3FFF: bay-related wakeups */
2825                         if (hkey == 0x3003) {
2826                                 hotkey_autosleep_ack = 1;
2827                                 printk(TPACPI_INFO
2828                                        "bay ejected\n");
2829                                 hotkey_wakeup_hotunplug_complete_notify_change();
2830                                 known_ev = true;
2831                         } else {
2832                                 known_ev = false;
2833                         }
2834                         break;
2835                 case 4:
2836                         /* 0x4000-0x4FFF: dock-related wakeups */
2837                         if (hkey == 0x4003) {
2838                                 hotkey_autosleep_ack = 1;
2839                                 printk(TPACPI_INFO
2840                                        "undocked\n");
2841                                 hotkey_wakeup_hotunplug_complete_notify_change();
2842                                 known_ev = true;
2843                         } else {
2844                                 known_ev = false;
2845                         }
2846                         break;
2847                 case 5:
2848                         /* 0x5000-0x5FFF: human interface helpers */
2849                         known_ev = hotkey_notify_usrevent(hkey, &send_acpi_ev,
2850                                                  &ignore_acpi_ev);
2851                         break;
2852                 case 6:
2853                         /* 0x6000-0x6FFF: thermal alarms */
2854                         known_ev = hotkey_notify_thermal(hkey, &send_acpi_ev,
2855                                                  &ignore_acpi_ev);
2856                         break;
2857                 case 7:
2858                         /* 0x7000-0x7FFF: misc */
2859                         if (tp_features.hotkey_wlsw && hkey == 0x7000) {
2860                                 tpacpi_send_radiosw_update();
2861                                 send_acpi_ev = 0;
2862                                 known_ev = true;
2863                                 break;
2864                         }
2865                         /* fallthrough to default */
2866                 default:
2867                         known_ev = false;
2868                 }
2869                 if (!known_ev) {
2870                         printk(TPACPI_NOTICE
2871                                "unhandled HKEY event 0x%04x\n", hkey);
2872                         printk(TPACPI_NOTICE
2873                                "please report the conditions when this "
2874                                "event happened to %s\n", TPACPI_MAIL);
2875                 }
2876
2877                 /* Legacy events */
2878                 if (!ignore_acpi_ev &&
2879                     (send_acpi_ev || hotkey_report_mode < 2)) {
2880                         acpi_bus_generate_proc_event(ibm->acpi->device,
2881                                                      event, hkey);
2882                 }
2883
2884                 /* netlink events */
2885                 if (!ignore_acpi_ev && send_acpi_ev) {
2886                         acpi_bus_generate_netlink_event(
2887                                         ibm->acpi->device->pnp.device_class,
2888                                         dev_name(&ibm->acpi->device->dev),
2889                                         event, hkey);
2890                 }
2891         }
2892 }
2893
2894 static void hotkey_suspend(pm_message_t state)
2895 {
2896         /* Do these on suspend, we get the events on early resume! */
2897         hotkey_wakeup_reason = TP_ACPI_WAKEUP_NONE;
2898         hotkey_autosleep_ack = 0;
2899 }
2900
2901 static void hotkey_resume(void)
2902 {
2903         tpacpi_disable_brightness_delay();
2904
2905         if (hotkey_mask_get())
2906                 printk(TPACPI_ERR
2907                        "error while trying to read hot key mask "
2908                        "from firmware\n");
2909         tpacpi_send_radiosw_update();
2910         hotkey_tablet_mode_notify_change();
2911         hotkey_wakeup_reason_notify_change();
2912         hotkey_wakeup_hotunplug_complete_notify_change();
2913         hotkey_poll_setup_safe(0);
2914 }
2915
2916 /* procfs -------------------------------------------------------------- */
2917 static int hotkey_read(char *p)
2918 {
2919         int res, status;
2920         int len = 0;
2921
2922         if (!tp_features.hotkey) {
2923                 len += sprintf(p + len, "status:\t\tnot supported\n");
2924                 return len;
2925         }
2926
2927         if (mutex_lock_killable(&hotkey_mutex))
2928                 return -ERESTARTSYS;
2929         res = hotkey_status_get(&status);
2930         if (!res)
2931                 res = hotkey_mask_get();
2932         mutex_unlock(&hotkey_mutex);
2933         if (res)
2934                 return res;
2935
2936         len += sprintf(p + len, "status:\t\t%s\n", enabled(status, 0));
2937         if (tp_features.hotkey_mask) {
2938                 len += sprintf(p + len, "mask:\t\t0x%08x\n", hotkey_mask);
2939                 len += sprintf(p + len,
2940                                "commands:\tenable, disable, reset, <mask>\n");
2941         } else {
2942                 len += sprintf(p + len, "mask:\t\tnot supported\n");
2943                 len += sprintf(p + len, "commands:\tenable, disable, reset\n");
2944         }
2945
2946         return len;
2947 }
2948
2949 static void hotkey_enabledisable_warn(bool enable)
2950 {
2951         tpacpi_log_usertask("procfs hotkey enable/disable");
2952         if (!WARN((tpacpi_lifecycle == TPACPI_LIFE_RUNNING || !enable),
2953                         TPACPI_WARN
2954                         "hotkey enable/disable functionality has been "
2955                         "removed from the driver.  Hotkeys are always "
2956                         "enabled\n"))
2957                 printk(TPACPI_ERR
2958                         "Please remove the hotkey=enable module "
2959                         "parameter, it is deprecated.  Hotkeys are always "
2960                         "enabled\n");
2961 }
2962
2963 static int hotkey_write(char *buf)
2964 {
2965         int res;
2966         u32 mask;
2967         char *cmd;
2968
2969         if (!tp_features.hotkey)
2970                 return -ENODEV;
2971
2972         if (mutex_lock_killable(&hotkey_mutex))
2973                 return -ERESTARTSYS;
2974
2975         mask = hotkey_mask;
2976
2977         res = 0;
2978         while ((cmd = next_cmd(&buf))) {
2979                 if (strlencmp(cmd, "enable") == 0) {
2980                         hotkey_enabledisable_warn(1);
2981                 } else if (strlencmp(cmd, "disable") == 0) {
2982                         hotkey_enabledisable_warn(0);
2983                         res = -EPERM;
2984                 } else if (strlencmp(cmd, "reset") == 0) {
2985                         mask = hotkey_orig_mask;
2986                 } else if (sscanf(cmd, "0x%x", &mask) == 1) {
2987                         /* mask set */
2988                 } else if (sscanf(cmd, "%x", &mask) == 1) {
2989                         /* mask set */
2990                 } else {
2991                         res = -EINVAL;
2992                         goto errexit;
2993                 }
2994         }
2995
2996         if (!res)
2997                 tpacpi_disclose_usertask("procfs hotkey",
2998                         "set mask to 0x%08x\n", mask);
2999
3000         if (!res && mask != hotkey_mask)
3001                 res = hotkey_mask_set(mask);
3002
3003 errexit:
3004         mutex_unlock(&hotkey_mutex);
3005         return res;
3006 }
3007
3008 static const struct acpi_device_id ibm_htk_device_ids[] = {
3009         {TPACPI_ACPI_HKEY_HID, 0},
3010         {"", 0},
3011 };
3012
3013 static struct tp_acpi_drv_struct ibm_hotkey_acpidriver = {
3014         .hid = ibm_htk_device_ids,
3015         .notify = hotkey_notify,
3016         .handle = &hkey_handle,
3017         .type = ACPI_DEVICE_NOTIFY,
3018 };
3019
3020 static struct ibm_struct hotkey_driver_data = {
3021         .name = "hotkey",
3022         .read = hotkey_read,
3023         .write = hotkey_write,
3024         .exit = hotkey_exit,
3025         .resume = hotkey_resume,
3026         .suspend = hotkey_suspend,
3027         .acpi = &ibm_hotkey_acpidriver,
3028 };
3029
3030 /*************************************************************************
3031  * Bluetooth subdriver
3032  */
3033
3034 enum {
3035         /* ACPI GBDC/SBDC bits */
3036         TP_ACPI_BLUETOOTH_HWPRESENT     = 0x01, /* Bluetooth hw available */
3037         TP_ACPI_BLUETOOTH_RADIOSSW      = 0x02, /* Bluetooth radio enabled */
3038         TP_ACPI_BLUETOOTH_RESUMECTRL    = 0x04, /* Bluetooth state at resume:
3039                                                    off / last state */
3040 };
3041
3042 enum {
3043         /* ACPI \BLTH commands */
3044         TP_ACPI_BLTH_GET_ULTRAPORT_ID   = 0x00, /* Get Ultraport BT ID */
3045         TP_ACPI_BLTH_GET_PWR_ON_RESUME  = 0x01, /* Get power-on-resume state */
3046         TP_ACPI_BLTH_PWR_ON_ON_RESUME   = 0x02, /* Resume powered on */
3047         TP_ACPI_BLTH_PWR_OFF_ON_RESUME  = 0x03, /* Resume powered off */
3048         TP_ACPI_BLTH_SAVE_STATE         = 0x05, /* Save state for S4/S5 */
3049 };
3050
3051 #define TPACPI_RFK_BLUETOOTH_SW_NAME    "tpacpi_bluetooth_sw"
3052
3053 static struct rfkill *tpacpi_bluetooth_rfkill;
3054
3055 static void bluetooth_suspend(pm_message_t state)
3056 {
3057         /* Try to make sure radio will resume powered off */
3058         if (!acpi_evalf(NULL, NULL, "\\BLTH", "vd",
3059                    TP_ACPI_BLTH_PWR_OFF_ON_RESUME))
3060                 vdbg_printk(TPACPI_DBG_RFKILL,
3061                         "bluetooth power down on resume request failed\n");
3062 }
3063
3064 static int bluetooth_get_radiosw(void)
3065 {
3066         int status;
3067
3068         if (!tp_features.bluetooth)
3069                 return -ENODEV;
3070
3071         /* WLSW overrides bluetooth in firmware/hardware, reflect that */
3072         if (tp_features.hotkey_wlsw && !hotkey_get_wlsw(&status) && !status)
3073                 return RFKILL_STATE_HARD_BLOCKED;
3074
3075 #ifdef CONFIG_THINKPAD_ACPI_DEBUGFACILITIES
3076         if (dbg_bluetoothemul)
3077                 return (tpacpi_bluetooth_emulstate) ?
3078                         RFKILL_STATE_UNBLOCKED : RFKILL_STATE_SOFT_BLOCKED;
3079 #endif
3080
3081         if (!acpi_evalf(hkey_handle, &status, "GBDC", "d"))
3082                 return -EIO;
3083
3084         return ((status & TP_ACPI_BLUETOOTH_RADIOSSW) != 0) ?
3085                 RFKILL_STATE_UNBLOCKED : RFKILL_STATE_SOFT_BLOCKED;
3086 }
3087
3088 static void bluetooth_update_rfk(void)
3089 {
3090         int status;
3091
3092         if (!tpacpi_bluetooth_rfkill)
3093                 return;
3094
3095         status = bluetooth_get_radiosw();
3096         if (status < 0)
3097                 return;
3098         rfkill_force_state(tpacpi_bluetooth_rfkill, status);
3099
3100         vdbg_printk(TPACPI_DBG_RFKILL,
3101                 "forced rfkill state to %d\n",
3102                 status);
3103 }
3104
3105 static int bluetooth_set_radiosw(int radio_on, int update_rfk)
3106 {
3107         int status;
3108
3109         if (!tp_features.bluetooth)
3110                 return -ENODEV;
3111
3112         /* WLSW overrides bluetooth in firmware/hardware, but there is no
3113          * reason to risk weird behaviour. */
3114         if (tp_features.hotkey_wlsw && !hotkey_get_wlsw(&status) && !status
3115             && radio_on)
3116                 return -EPERM;
3117
3118         vdbg_printk(TPACPI_DBG_RFKILL,
3119                 "will %s bluetooth\n", radio_on ? "enable" : "disable");
3120
3121 #ifdef CONFIG_THINKPAD_ACPI_DEBUGFACILITIES
3122         if (dbg_bluetoothemul) {
3123                 tpacpi_bluetooth_emulstate = !!radio_on;
3124                 if (update_rfk)
3125                         bluetooth_update_rfk();
3126                 return 0;
3127         }
3128 #endif
3129
3130         /* We make sure to keep TP_ACPI_BLUETOOTH_RESUMECTRL off */
3131         if (radio_on)
3132                 status = TP_ACPI_BLUETOOTH_RADIOSSW;
3133         else
3134                 status = 0;
3135         if (!acpi_evalf(hkey_handle, NULL, "SBDC", "vd", status))
3136                 return -EIO;
3137
3138         if (update_rfk)
3139                 bluetooth_update_rfk();
3140
3141         return 0;
3142 }
3143
3144 /* sysfs bluetooth enable ---------------------------------------------- */
3145 static ssize_t bluetooth_enable_show(struct device *dev,
3146                            struct device_attribute *attr,
3147                            char *buf)
3148 {
3149         int status;
3150
3151         printk_deprecated_rfkill_attribute("bluetooth_enable");
3152
3153         status = bluetooth_get_radiosw();
3154         if (status < 0)
3155                 return status;
3156
3157         return snprintf(buf, PAGE_SIZE, "%d\n",
3158                         (status == RFKILL_STATE_UNBLOCKED) ? 1 : 0);
3159 }
3160
3161 static ssize_t bluetooth_enable_store(struct device *dev,
3162                             struct device_attribute *attr,
3163                             const char *buf, size_t count)
3164 {
3165         unsigned long t;
3166         int res;
3167
3168         printk_deprecated_rfkill_attribute("bluetooth_enable");
3169
3170         if (parse_strtoul(buf, 1, &t))
3171                 return -EINVAL;
3172
3173         tpacpi_disclose_usertask("bluetooth_enable", "set to %ld\n", t);
3174
3175         res = bluetooth_set_radiosw(t, 1);
3176
3177         return (res) ? res : count;
3178 }
3179
3180 static struct device_attribute dev_attr_bluetooth_enable =
3181         __ATTR(bluetooth_enable, S_IWUSR | S_IRUGO,
3182                 bluetooth_enable_show, bluetooth_enable_store);
3183
3184 /* --------------------------------------------------------------------- */
3185
3186 static struct attribute *bluetooth_attributes[] = {
3187         &dev_attr_bluetooth_enable.attr,
3188         NULL
3189 };
3190
3191 static const struct attribute_group bluetooth_attr_group = {
3192         .attrs = bluetooth_attributes,
3193 };
3194
3195 static int tpacpi_bluetooth_rfk_get(void *data, enum rfkill_state *state)
3196 {
3197         int bts = bluetooth_get_radiosw();
3198
3199         if (bts < 0)
3200                 return bts;
3201
3202         *state = bts;
3203         return 0;
3204 }
3205
3206 static int tpacpi_bluetooth_rfk_set(void *data, enum rfkill_state state)
3207 {
3208         dbg_printk(TPACPI_DBG_RFKILL,
3209                    "request to change radio state to %d\n", state);
3210         return bluetooth_set_radiosw((state == RFKILL_STATE_UNBLOCKED), 0);
3211 }
3212
3213 static void bluetooth_shutdown(void)
3214 {
3215         /* Order firmware to save current state to NVRAM */
3216         if (!acpi_evalf(NULL, NULL, "\\BLTH", "vd",
3217                         TP_ACPI_BLTH_SAVE_STATE))
3218                 printk(TPACPI_NOTICE
3219                         "failed to save bluetooth state to NVRAM\n");
3220         else
3221                 vdbg_printk(TPACPI_DBG_RFKILL,
3222                         "bluestooth state saved to NVRAM\n");
3223 }
3224
3225 static void bluetooth_exit(void)
3226 {
3227         bluetooth_shutdown();
3228
3229         if (tpacpi_bluetooth_rfkill)
3230                 rfkill_unregister(tpacpi_bluetooth_rfkill);
3231
3232         sysfs_remove_group(&tpacpi_pdev->dev.kobj,
3233                         &bluetooth_attr_group);
3234 }
3235
3236 static int __init bluetooth_init(struct ibm_init_struct *iibm)
3237 {
3238         int res;
3239         int status = 0;
3240
3241         vdbg_printk(TPACPI_DBG_INIT | TPACPI_DBG_RFKILL,
3242                         "initializing bluetooth subdriver\n");
3243
3244         TPACPI_ACPIHANDLE_INIT(hkey);
3245
3246         /* bluetooth not supported on 570, 600e/x, 770e, 770x, A21e, A2xm/p,
3247            G4x, R30, R31, R40e, R50e, T20-22, X20-21 */
3248         tp_features.bluetooth = hkey_handle &&
3249             acpi_evalf(hkey_handle, &status, "GBDC", "qd");
3250
3251         vdbg_printk(TPACPI_DBG_INIT | TPACPI_DBG_RFKILL,
3252                 "bluetooth is %s, status 0x%02x\n",
3253                 str_supported(tp_features.bluetooth),
3254                 status);
3255
3256 #ifdef CONFIG_THINKPAD_ACPI_DEBUGFACILITIES
3257         if (dbg_bluetoothemul) {
3258                 tp_features.bluetooth = 1;
3259                 printk(TPACPI_INFO
3260                         "bluetooth switch emulation enabled\n");
3261         } else
3262 #endif
3263         if (tp_features.bluetooth &&
3264             !(status & TP_ACPI_BLUETOOTH_HWPRESENT)) {
3265                 /* no bluetooth hardware present in system */
3266                 tp_features.bluetooth = 0;
3267                 dbg_printk(TPACPI_DBG_INIT | TPACPI_DBG_RFKILL,
3268                            "bluetooth hardware not installed\n");
3269         }
3270
3271         if (!tp_features.bluetooth)
3272                 return 1;
3273
3274         res = sysfs_create_group(&tpacpi_pdev->dev.kobj,
3275                                 &bluetooth_attr_group);
3276         if (res)
3277                 return res;
3278
3279         res = tpacpi_new_rfkill(TPACPI_RFK_BLUETOOTH_SW_ID,
3280                                 &tpacpi_bluetooth_rfkill,
3281                                 RFKILL_TYPE_BLUETOOTH,
3282                                 TPACPI_RFK_BLUETOOTH_SW_NAME,
3283                                 true,
3284                                 tpacpi_bluetooth_rfk_set,
3285                                 tpacpi_bluetooth_rfk_get);
3286         if (res) {
3287                 bluetooth_exit();
3288                 return res;
3289         }
3290
3291         return 0;
3292 }
3293
3294 /* procfs -------------------------------------------------------------- */
3295 static int bluetooth_read(char *p)
3296 {
3297         int len = 0;
3298         int status = bluetooth_get_radiosw();
3299
3300         if (!tp_features.bluetooth)
3301                 len += sprintf(p + len, "status:\t\tnot supported\n");
3302         else {
3303                 len += sprintf(p + len, "status:\t\t%s\n",
3304                                 (status == RFKILL_STATE_UNBLOCKED) ?
3305                                         "enabled" : "disabled");
3306                 len += sprintf(p + len, "commands:\tenable, disable\n");
3307         }
3308
3309         return len;
3310 }
3311
3312 static int bluetooth_write(char *buf)
3313 {
3314         char *cmd;
3315         int state = -1;
3316
3317         if (!tp_features.bluetooth)
3318                 return -ENODEV;
3319
3320         while ((cmd = next_cmd(&buf))) {
3321                 if (strlencmp(cmd, "enable") == 0) {
3322                         state = 1;
3323                 } else if (strlencmp(cmd, "disable") == 0) {
3324                         state = 0;
3325                 } else
3326                         return -EINVAL;
3327         }
3328
3329         if (state != -1) {
3330                 tpacpi_disclose_usertask("procfs bluetooth",
3331                         "attempt to %s\n",
3332                         state ? "enable" : "disable");
3333                 bluetooth_set_radiosw(state, 1);
3334         }
3335
3336         return 0;
3337 }
3338
3339 static struct ibm_struct bluetooth_driver_data = {
3340         .name = "bluetooth",
3341         .read = bluetooth_read,
3342         .write = bluetooth_write,
3343         .exit = bluetooth_exit,
3344         .suspend = bluetooth_suspend,
3345         .shutdown = bluetooth_shutdown,
3346 };
3347
3348 /*************************************************************************
3349  * Wan subdriver
3350  */
3351
3352 enum {
3353         /* ACPI GWAN/SWAN bits */
3354         TP_ACPI_WANCARD_HWPRESENT       = 0x01, /* Wan hw available */
3355         TP_ACPI_WANCARD_RADIOSSW        = 0x02, /* Wan radio enabled */
3356         TP_ACPI_WANCARD_RESUMECTRL      = 0x04, /* Wan state at resume:
3357                                                    off / last state */
3358 };
3359
3360 #define TPACPI_RFK_WWAN_SW_NAME         "tpacpi_wwan_sw"
3361
3362 static struct rfkill *tpacpi_wan_rfkill;
3363
3364 static void wan_suspend(pm_message_t state)
3365 {
3366         /* Try to make sure radio will resume powered off */
3367         if (!acpi_evalf(NULL, NULL, "\\WGSV", "qvd",
3368                    TP_ACPI_WGSV_PWR_OFF_ON_RESUME))
3369                 vdbg_printk(TPACPI_DBG_RFKILL,
3370                         "WWAN power down on resume request failed\n");
3371 }
3372
3373 static int wan_get_radiosw(void)
3374 {
3375         int status;
3376
3377         if (!tp_features.wan)
3378                 return -ENODEV;
3379
3380         /* WLSW overrides WWAN in firmware/hardware, reflect that */
3381         if (tp_features.hotkey_wlsw && !hotkey_get_wlsw(&status) && !status)
3382                 return RFKILL_STATE_HARD_BLOCKED;
3383
3384 #ifdef CONFIG_THINKPAD_ACPI_DEBUGFACILITIES
3385         if (dbg_wwanemul)
3386                 return (tpacpi_wwan_emulstate) ?
3387                         RFKILL_STATE_UNBLOCKED : RFKILL_STATE_SOFT_BLOCKED;
3388 #endif
3389
3390         if (!acpi_evalf(hkey_handle, &status, "GWAN", "d"))
3391                 return -EIO;
3392
3393         return ((status & TP_ACPI_WANCARD_RADIOSSW) != 0) ?
3394                 RFKILL_STATE_UNBLOCKED : RFKILL_STATE_SOFT_BLOCKED;
3395 }
3396
3397 static void wan_update_rfk(void)
3398 {
3399         int status;
3400
3401         if (!tpacpi_wan_rfkill)
3402                 return;
3403
3404         status = wan_get_radiosw();
3405         if (status < 0)
3406                 return;
3407         rfkill_force_state(tpacpi_wan_rfkill, status);
3408
3409         vdbg_printk(TPACPI_DBG_RFKILL,
3410                 "forced rfkill state to %d\n",
3411                 status);
3412 }
3413
3414 static int wan_set_radiosw(int radio_on, int update_rfk)
3415 {
3416         int status;
3417
3418         if (!tp_features.wan)
3419                 return -ENODEV;
3420
3421         /* WLSW overrides bluetooth in firmware/hardware, but there is no
3422          * reason to risk weird behaviour. */
3423         if (tp_features.hotkey_wlsw && !hotkey_get_wlsw(&status) && !status
3424             && radio_on)
3425                 return -EPERM;
3426
3427         vdbg_printk(TPACPI_DBG_RFKILL,
3428                 "will %s WWAN\n", radio_on ? "enable" : "disable");
3429
3430 #ifdef CONFIG_THINKPAD_ACPI_DEBUGFACILITIES
3431         if (dbg_wwanemul) {
3432                 tpacpi_wwan_emulstate = !!radio_on;
3433                 if (update_rfk)
3434                         wan_update_rfk();
3435                 return 0;
3436         }
3437 #endif
3438
3439         /* We make sure to keep TP_ACPI_WANCARD_RESUMECTRL off */
3440         if (radio_on)
3441                 status = TP_ACPI_WANCARD_RADIOSSW;
3442         else
3443                 status = 0;
3444         if (!acpi_evalf(hkey_handle, NULL, "SWAN", "vd", status))
3445                 return -EIO;
3446
3447         if (update_rfk)
3448                 wan_update_rfk();
3449
3450         return 0;
3451 }
3452
3453 /* sysfs wan enable ---------------------------------------------------- */
3454 static ssize_t wan_enable_show(struct device *dev,
3455                            struct device_attribute *attr,
3456                            char *buf)
3457 {
3458         int status;
3459
3460         printk_deprecated_rfkill_attribute("wwan_enable");
3461
3462         status = wan_get_radiosw();
3463         if (status < 0)
3464                 return status;
3465
3466         return snprintf(buf, PAGE_SIZE, "%d\n",
3467                         (status == RFKILL_STATE_UNBLOCKED) ? 1 : 0);
3468 }
3469
3470 static ssize_t wan_enable_store(struct device *dev,
3471                             struct device_attribute *attr,
3472                             const char *buf, size_t count)
3473 {
3474         unsigned long t;
3475         int res;
3476
3477         printk_deprecated_rfkill_attribute("wwan_enable");
3478
3479         if (parse_strtoul(buf, 1, &t))
3480                 return -EINVAL;
3481
3482         tpacpi_disclose_usertask("wwan_enable", "set to %ld\n", t);
3483
3484         res = wan_set_radiosw(t, 1);
3485
3486         return (res) ? res : count;
3487 }
3488
3489 static struct device_attribute dev_attr_wan_enable =
3490         __ATTR(wwan_enable, S_IWUSR | S_IRUGO,
3491                 wan_enable_show, wan_enable_store);
3492
3493 /* --------------------------------------------------------------------- */
3494
3495 static struct attribute *wan_attributes[] = {
3496         &dev_attr_wan_enable.attr,
3497         NULL
3498 };
3499
3500 static const struct attribute_group wan_attr_group = {
3501         .attrs = wan_attributes,
3502 };
3503
3504 static int tpacpi_wan_rfk_get(void *data, enum rfkill_state *state)
3505 {
3506         int wans = wan_get_radiosw();
3507
3508         if (wans < 0)
3509                 return wans;
3510
3511         *state = wans;
3512         return 0;
3513 }
3514
3515 static int tpacpi_wan_rfk_set(void *data, enum rfkill_state state)
3516 {
3517         dbg_printk(TPACPI_DBG_RFKILL,
3518                    "request to change radio state to %d\n", state);
3519         return wan_set_radiosw((state == RFKILL_STATE_UNBLOCKED), 0);
3520 }
3521
3522 static void wan_shutdown(void)
3523 {
3524         /* Order firmware to save current state to NVRAM */
3525         if (!acpi_evalf(NULL, NULL, "\\WGSV", "vd",
3526                         TP_ACPI_WGSV_SAVE_STATE))
3527                 printk(TPACPI_NOTICE
3528                         "failed to save WWAN state to NVRAM\n");
3529         else
3530                 vdbg_printk(TPACPI_DBG_RFKILL,
3531                         "WWAN state saved to NVRAM\n");
3532 }
3533
3534 static void wan_exit(void)
3535 {
3536         wan_shutdown();
3537
3538         if (tpacpi_wan_rfkill)
3539                 rfkill_unregister(tpacpi_wan_rfkill);
3540
3541         sysfs_remove_group(&tpacpi_pdev->dev.kobj,
3542                 &wan_attr_group);
3543 }
3544
3545 static int __init wan_init(struct ibm_init_struct *iibm)
3546 {
3547         int res;
3548         int status = 0;
3549
3550         vdbg_printk(TPACPI_DBG_INIT | TPACPI_DBG_RFKILL,
3551                         "initializing wan subdriver\n");
3552
3553         TPACPI_ACPIHANDLE_INIT(hkey);
3554
3555         tp_features.wan = hkey_handle &&
3556             acpi_evalf(hkey_handle, &status, "GWAN", "qd");
3557
3558         vdbg_printk(TPACPI_DBG_INIT | TPACPI_DBG_RFKILL,
3559                 "wan is %s, status 0x%02x\n",
3560                 str_supported(tp_features.wan),
3561                 status);
3562
3563 #ifdef CONFIG_THINKPAD_ACPI_DEBUGFACILITIES
3564         if (dbg_wwanemul) {
3565                 tp_features.wan = 1;
3566                 printk(TPACPI_INFO
3567                         "wwan switch emulation enabled\n");
3568         } else
3569 #endif
3570         if (tp_features.wan &&
3571             !(status & TP_ACPI_WANCARD_HWPRESENT)) {
3572                 /* no wan hardware present in system */
3573                 tp_features.wan = 0;
3574                 dbg_printk(TPACPI_DBG_INIT | TPACPI_DBG_RFKILL,
3575                            "wan hardware not installed\n");
3576         }
3577
3578         if (!tp_features.wan)
3579                 return 1;
3580
3581         res = sysfs_create_group(&tpacpi_pdev->dev.kobj,
3582                                 &wan_attr_group);
3583         if (res)
3584                 return res;
3585
3586         res = tpacpi_new_rfkill(TPACPI_RFK_WWAN_SW_ID,
3587                                 &tpacpi_wan_rfkill,
3588                                 RFKILL_TYPE_WWAN,
3589                                 TPACPI_RFK_WWAN_SW_NAME,
3590                                 true,
3591                                 tpacpi_wan_rfk_set,
3592                                 tpacpi_wan_rfk_get);
3593         if (res) {
3594                 wan_exit();
3595                 return res;
3596         }
3597
3598         return 0;
3599 }
3600
3601 /* procfs -------------------------------------------------------------- */
3602 static int wan_read(char *p)
3603 {
3604         int len = 0;
3605         int status = wan_get_radiosw();
3606
3607         tpacpi_disclose_usertask("procfs wan", "read");
3608
3609         if (!tp_features.wan)
3610                 len += sprintf(p + len, "status:\t\tnot supported\n");
3611         else {
3612                 len += sprintf(p + len, "status:\t\t%s\n",
3613                                 (status == RFKILL_STATE_UNBLOCKED) ?
3614                                         "enabled" : "disabled");
3615                 len += sprintf(p + len, "commands:\tenable, disable\n");
3616         }
3617
3618         return len;
3619 }
3620
3621 static int wan_write(char *buf)
3622 {
3623         char *cmd;
3624         int state = -1;
3625
3626         if (!tp_features.wan)
3627                 return -ENODEV;
3628
3629         while ((cmd = next_cmd(&buf))) {
3630                 if (strlencmp(cmd, "enable") == 0) {
3631                         state = 1;
3632                 } else if (strlencmp(cmd, "disable") == 0) {
3633                         state = 0;
3634                 } else
3635                         return -EINVAL;
3636         }
3637
3638         if (state != -1) {
3639                 tpacpi_disclose_usertask("procfs wan",
3640                         "attempt to %s\n",
3641                         state ? "enable" : "disable");
3642                 wan_set_radiosw(state, 1);
3643         }
3644
3645         return 0;
3646 }
3647
3648 static struct ibm_struct wan_driver_data = {
3649         .name = "wan",
3650         .read = wan_read,
3651         .write = wan_write,
3652         .exit = wan_exit,
3653         .suspend = wan_suspend,
3654         .shutdown = wan_shutdown,
3655 };
3656
3657 /*************************************************************************
3658  * UWB subdriver
3659  */
3660
3661 enum {
3662         /* ACPI GUWB/SUWB bits */
3663         TP_ACPI_UWB_HWPRESENT   = 0x01, /* UWB hw available */
3664         TP_ACPI_UWB_RADIOSSW    = 0x02, /* UWB radio enabled */
3665 };
3666
3667 #define TPACPI_RFK_UWB_SW_NAME  "tpacpi_uwb_sw"
3668
3669 static struct rfkill *tpacpi_uwb_rfkill;
3670
3671 static int uwb_get_radiosw(void)
3672 {
3673         int status;
3674
3675         if (!tp_features.uwb)
3676                 return -ENODEV;
3677
3678         /* WLSW overrides UWB in firmware/hardware, reflect that */
3679         if (tp_features.hotkey_wlsw && !hotkey_get_wlsw(&status) && !status)
3680                 return RFKILL_STATE_HARD_BLOCKED;
3681
3682 #ifdef CONFIG_THINKPAD_ACPI_DEBUGFACILITIES
3683         if (dbg_uwbemul)
3684                 return (tpacpi_uwb_emulstate) ?
3685                         RFKILL_STATE_UNBLOCKED : RFKILL_STATE_SOFT_BLOCKED;
3686 #endif
3687
3688         if (!acpi_evalf(hkey_handle, &status, "GUWB", "d"))
3689                 return -EIO;
3690
3691         return ((status & TP_ACPI_UWB_RADIOSSW) != 0) ?
3692                 RFKILL_STATE_UNBLOCKED : RFKILL_STATE_SOFT_BLOCKED;
3693 }
3694
3695 static void uwb_update_rfk(void)
3696 {
3697         int status;
3698
3699         if (!tpacpi_uwb_rfkill)
3700                 return;
3701
3702         status = uwb_get_radiosw();
3703         if (status < 0)
3704                 return;
3705         rfkill_force_state(tpacpi_uwb_rfkill, status);
3706
3707         vdbg_printk(TPACPI_DBG_RFKILL,
3708                 "forced rfkill state to %d\n",
3709                 status);
3710 }
3711
3712 static int uwb_set_radiosw(int radio_on, int update_rfk)
3713 {
3714         int status;
3715
3716         if (!tp_features.uwb)
3717                 return -ENODEV;
3718
3719         /* WLSW overrides UWB in firmware/hardware, but there is no
3720          * reason to risk weird behaviour. */
3721         if (tp_features.hotkey_wlsw && !hotkey_get_wlsw(&status) && !status
3722             && radio_on)
3723                 return -EPERM;
3724
3725         vdbg_printk(TPACPI_DBG_RFKILL,
3726                         "will %s UWB\n", radio_on ? "enable" : "disable");
3727
3728 #ifdef CONFIG_THINKPAD_ACPI_DEBUGFACILITIES
3729         if (dbg_uwbemul) {
3730                 tpacpi_uwb_emulstate = !!radio_on;
3731                 if (update_rfk)
3732                         uwb_update_rfk();
3733                 return 0;
3734         }
3735 #endif
3736
3737         status = (radio_on) ? TP_ACPI_UWB_RADIOSSW : 0;
3738         if (!acpi_evalf(hkey_handle, NULL, "SUWB", "vd", status))
3739                 return -EIO;
3740
3741         if (update_rfk)
3742                 uwb_update_rfk();
3743
3744         return 0;
3745 }
3746
3747 /* --------------------------------------------------------------------- */
3748
3749 static int tpacpi_uwb_rfk_get(void *data, enum rfkill_state *state)
3750 {
3751         int uwbs = uwb_get_radiosw();
3752
3753         if (uwbs < 0)
3754                 return uwbs;
3755
3756         *state = uwbs;
3757         return 0;
3758 }
3759
3760 static int tpacpi_uwb_rfk_set(void *data, enum rfkill_state state)
3761 {
3762         dbg_printk(TPACPI_DBG_RFKILL,
3763                    "request to change radio state to %d\n", state);
3764         return uwb_set_radiosw((state == RFKILL_STATE_UNBLOCKED), 0);
3765 }
3766
3767 static void uwb_exit(void)
3768 {
3769         if (tpacpi_uwb_rfkill)
3770                 rfkill_unregister(tpacpi_uwb_rfkill);
3771 }
3772
3773 static int __init uwb_init(struct ibm_init_struct *iibm)
3774 {
3775         int res;
3776         int status = 0;
3777
3778         vdbg_printk(TPACPI_DBG_INIT | TPACPI_DBG_RFKILL,
3779                         "initializing uwb subdriver\n");
3780
3781         TPACPI_ACPIHANDLE_INIT(hkey);
3782
3783         tp_features.uwb = hkey_handle &&
3784             acpi_evalf(hkey_handle, &status, "GUWB", "qd");
3785
3786         vdbg_printk(TPACPI_DBG_INIT | TPACPI_DBG_RFKILL,
3787                 "uwb is %s, status 0x%02x\n",
3788                 str_supported(tp_features.uwb),
3789                 status);
3790
3791 #ifdef CONFIG_THINKPAD_ACPI_DEBUGFACILITIES
3792         if (dbg_uwbemul) {
3793                 tp_features.uwb = 1;
3794                 printk(TPACPI_INFO
3795                         "uwb switch emulation enabled\n");
3796         } else
3797 #endif
3798         if (tp_features.uwb &&
3799             !(status & TP_ACPI_UWB_HWPRESENT)) {
3800                 /* no uwb hardware present in system */
3801                 tp_features.uwb = 0;
3802                 dbg_printk(TPACPI_DBG_INIT,
3803                            "uwb hardware not installed\n");
3804         }
3805
3806         if (!tp_features.uwb)
3807                 return 1;
3808
3809         res = tpacpi_new_rfkill(TPACPI_RFK_UWB_SW_ID,
3810                                 &tpacpi_uwb_rfkill,
3811                                 RFKILL_TYPE_UWB,
3812                                 TPACPI_RFK_UWB_SW_NAME,
3813                                 false,
3814                                 tpacpi_uwb_rfk_set,
3815                                 tpacpi_uwb_rfk_get);
3816
3817         return res;
3818 }
3819
3820 static struct ibm_struct uwb_driver_data = {
3821         .name = "uwb",
3822         .exit = uwb_exit,
3823         .flags.experimental = 1,
3824 };
3825
3826 /*************************************************************************
3827  * Video subdriver
3828  */
3829
3830 #ifdef CONFIG_THINKPAD_ACPI_VIDEO
3831
3832 enum video_access_mode {
3833         TPACPI_VIDEO_NONE = 0,
3834         TPACPI_VIDEO_570,       /* 570 */
3835         TPACPI_VIDEO_770,       /* 600e/x, 770e, 770x */
3836         TPACPI_VIDEO_NEW,       /* all others */
3837 };
3838
3839 enum {  /* video status flags, based on VIDEO_570 */
3840         TP_ACPI_VIDEO_S_LCD = 0x01,     /* LCD output enabled */
3841         TP_ACPI_VIDEO_S_CRT = 0x02,     /* CRT output enabled */
3842         TP_ACPI_VIDEO_S_DVI = 0x08,     /* DVI output enabled */
3843 };
3844
3845 enum {  /* TPACPI_VIDEO_570 constants */
3846         TP_ACPI_VIDEO_570_PHSCMD = 0x87,        /* unknown magic constant :( */
3847         TP_ACPI_VIDEO_570_PHSMASK = 0x03,       /* PHS bits that map to
3848                                                  * video_status_flags */
3849         TP_ACPI_VIDEO_570_PHS2CMD = 0x8b,       /* unknown magic constant :( */
3850         TP_ACPI_VIDEO_570_PHS2SET = 0x80,       /* unknown magic constant :( */
3851 };
3852
3853 static enum video_access_mode video_supported;
3854 static int video_orig_autosw;
3855
3856 static int video_autosw_get(void);
3857 static int video_autosw_set(int enable);
3858
3859 TPACPI_HANDLE(vid2, root, "\\_SB.PCI0.AGPB.VID");       /* G41 */
3860
3861 static int __init video_init(struct ibm_init_struct *iibm)
3862 {
3863         int ivga;
3864
3865         vdbg_printk(TPACPI_DBG_INIT, "initializing video subdriver\n");
3866
3867         TPACPI_ACPIHANDLE_INIT(vid);
3868         TPACPI_ACPIHANDLE_INIT(vid2);
3869
3870         if (vid2_handle && acpi_evalf(NULL, &ivga, "\\IVGA", "d") && ivga)
3871                 /* G41, assume IVGA doesn't change */
3872                 vid_handle = vid2_handle;
3873
3874         if (!vid_handle)
3875                 /* video switching not supported on R30, R31 */
3876                 video_supported = TPACPI_VIDEO_NONE;
3877         else if (acpi_evalf(vid_handle, &video_orig_autosw, "SWIT", "qd"))
3878                 /* 570 */
3879                 video_supported = TPACPI_VIDEO_570;
3880         else if (acpi_evalf(vid_handle, &video_orig_autosw, "^VADL", "qd"))
3881                 /* 600e/x, 770e, 770x */
3882                 video_supported = TPACPI_VIDEO_770;
3883         else
3884                 /* all others */
3885                 video_supported = TPACPI_VIDEO_NEW;
3886
3887         vdbg_printk(TPACPI_DBG_INIT, "video is %s, mode %d\n",
3888                 str_supported(video_supported != TPACPI_VIDEO_NONE),
3889                 video_supported);
3890
3891         return (video_supported != TPACPI_VIDEO_NONE)? 0 : 1;
3892 }
3893
3894 static void video_exit(void)
3895 {
3896         dbg_printk(TPACPI_DBG_EXIT,
3897                    "restoring original video autoswitch mode\n");
3898         if (video_autosw_set(video_orig_autosw))
3899                 printk(TPACPI_ERR "error while trying to restore original "
3900                         "video autoswitch mode\n");
3901 }
3902
3903 static int video_outputsw_get(void)
3904 {
3905         int status = 0;
3906         int i;
3907
3908         switch (video_supported) {
3909         case TPACPI_VIDEO_570:
3910                 if (!acpi_evalf(NULL, &i, "\\_SB.PHS", "dd",
3911                                  TP_ACPI_VIDEO_570_PHSCMD))
3912                         return -EIO;
3913                 status = i & TP_ACPI_VIDEO_570_PHSMASK;
3914                 break;
3915         case TPACPI_VIDEO_770:
3916                 if (!acpi_evalf(NULL, &i, "\\VCDL", "d"))
3917                         return -EIO;
3918                 if (i)
3919                         status |= TP_ACPI_VIDEO_S_LCD;
3920                 if (!acpi_evalf(NULL, &i, "\\VCDC", "d"))
3921                         return -EIO;
3922                 if (i)
3923                         status |= TP_ACPI_VIDEO_S_CRT;
3924                 break;
3925         case TPACPI_VIDEO_NEW:
3926                 if (!acpi_evalf(NULL, NULL, "\\VUPS", "vd", 1) ||
3927                     !acpi_evalf(NULL, &i, "\\VCDC", "d"))
3928                         return -EIO;
3929                 if (i)
3930                         status |= TP_ACPI_VIDEO_S_CRT;
3931
3932                 if (!acpi_evalf(NULL, NULL, "\\VUPS", "vd", 0) ||
3933                     !acpi_evalf(NULL, &i, "\\VCDL", "d"))
3934                         return -EIO;
3935                 if (i)
3936                         status |= TP_ACPI_VIDEO_S_LCD;
3937                 if (!acpi_evalf(NULL, &i, "\\VCDD", "d"))
3938                         return -EIO;
3939                 if (i)
3940                         status |= TP_ACPI_VIDEO_S_DVI;
3941                 break;
3942         default:
3943                 return -ENOSYS;
3944         }
3945
3946         return status;
3947 }
3948
3949 static int video_outputsw_set(int status)
3950 {
3951         int autosw;
3952         int res = 0;
3953
3954         switch (video_supported) {
3955         case TPACPI_VIDEO_570:
3956                 res = acpi_evalf(NULL, NULL,
3957                                  "\\_SB.PHS2", "vdd",
3958                                  TP_ACPI_VIDEO_570_PHS2CMD,
3959                                  status | TP_ACPI_VIDEO_570_PHS2SET);
3960                 break;
3961         case TPACPI_VIDEO_770:
3962                 autosw = video_autosw_get();
3963                 if (autosw < 0)
3964                         return autosw;
3965
3966                 res = video_autosw_set(1);
3967                 if (res)
3968                         return res;
3969                 res = acpi_evalf(vid_handle, NULL,
3970                                  "ASWT", "vdd", status * 0x100, 0);
3971                 if (!autosw && video_autosw_set(autosw)) {
3972                         printk(TPACPI_ERR
3973                                "video auto-switch left enabled due to error\n");
3974                         return -EIO;
3975                 }
3976                 break;
3977         case TPACPI_VIDEO_NEW:
3978                 res = acpi_evalf(NULL, NULL, "\\VUPS", "vd", 0x80) &&
3979                       acpi_evalf(NULL, NULL, "\\VSDS", "vdd", status, 1);
3980                 break;
3981         default:
3982                 return -ENOSYS;
3983         }
3984
3985         return (res)? 0 : -EIO;
3986 }
3987
3988 static int video_autosw_get(void)
3989 {
3990         int autosw = 0;
3991
3992         switch (video_supported) {
3993         case TPACPI_VIDEO_570:
3994                 if (!acpi_evalf(vid_handle, &autosw, "SWIT", "d"))
3995                         return -EIO;
3996                 break;
3997         case TPACPI_VIDEO_770:
3998         case TPACPI_VIDEO_NEW:
3999                 if (!acpi_evalf(vid_handle, &autosw, "^VDEE", "d"))
4000                         return -EIO;
4001                 break;
4002         default:
4003                 return -ENOSYS;
4004         }
4005
4006         return autosw & 1;
4007 }
4008
4009 static int video_autosw_set(int enable)
4010 {
4011         if (!acpi_evalf(vid_handle, NULL, "_DOS", "vd", (enable)? 1 : 0))
4012                 return -EIO;
4013         return 0;
4014 }
4015
4016 static int video_outputsw_cycle(void)
4017 {
4018         int autosw = video_autosw_get();
4019         int res;
4020
4021         if (autosw < 0)
4022                 return autosw;
4023
4024         switch (video_supported) {
4025         case TPACPI_VIDEO_570:
4026                 res = video_autosw_set(1);
4027                 if (res)
4028                         return res;
4029                 res = acpi_evalf(ec_handle, NULL, "_Q16", "v");
4030                 break;
4031         case TPACPI_VIDEO_770:
4032         case TPACPI_VIDEO_NEW:
4033                 res = video_autosw_set(1);
4034                 if (res)
4035                         return res;
4036                 res = acpi_evalf(vid_handle, NULL, "VSWT", "v");
4037                 break;
4038         default:
4039                 return -ENOSYS;
4040         }
4041         if (!autosw && video_autosw_set(autosw)) {
4042                 printk(TPACPI_ERR
4043                        "video auto-switch left enabled due to error\n");
4044                 return -EIO;
4045         }
4046
4047         return (res)? 0 : -EIO;
4048 }
4049
4050 static int video_expand_toggle(void)
4051 {
4052         switch (video_supported) {
4053         case TPACPI_VIDEO_570:
4054                 return acpi_evalf(ec_handle, NULL, "_Q17", "v")?
4055                         0 : -EIO;
4056         case TPACPI_VIDEO_770:
4057                 return acpi_evalf(vid_handle, NULL, "VEXP", "v")?
4058                         0 : -EIO;
4059         case TPACPI_VIDEO_NEW:
4060                 return acpi_evalf(NULL, NULL, "\\VEXP", "v")?
4061                         0 : -EIO;
4062         default:
4063                 return -ENOSYS;
4064         }
4065         /* not reached */
4066 }
4067
4068 static int video_read(char *p)
4069 {
4070         int status, autosw;
4071         int len = 0;
4072
4073         if (video_supported == TPACPI_VIDEO_NONE) {
4074                 len += sprintf(p + len, "status:\t\tnot supported\n");
4075                 return len;
4076         }
4077
4078         status = video_outputsw_get();
4079         if (status < 0)
4080                 return status;
4081
4082         autosw = video_autosw_get();
4083         if (autosw < 0)
4084                 return autosw;
4085
4086         len += sprintf(p + len, "status:\t\tsupported\n");
4087         len += sprintf(p + len, "lcd:\t\t%s\n", enabled(status, 0));
4088         len += sprintf(p + len, "crt:\t\t%s\n", enabled(status, 1));
4089         if (video_supported == TPACPI_VIDEO_NEW)
4090                 len += sprintf(p + len, "dvi:\t\t%s\n", enabled(status, 3));
4091         len += sprintf(p + len, "auto:\t\t%s\n", enabled(autosw, 0));
4092         len += sprintf(p + len, "commands:\tlcd_enable, lcd_disable\n");
4093         len += sprintf(p + len, "commands:\tcrt_enable, crt_disable\n");
4094         if (video_supported == TPACPI_VIDEO_NEW)
4095                 len += sprintf(p + len, "commands:\tdvi_enable, dvi_disable\n");
4096         len += sprintf(p + len, "commands:\tauto_enable, auto_disable\n");
4097         len += sprintf(p + len, "commands:\tvideo_switch, expand_toggle\n");
4098
4099         return len;
4100 }
4101
4102 static int video_write(char *buf)
4103 {
4104         char *cmd;
4105         int enable, disable, status;
4106         int res;
4107
4108         if (video_supported == TPACPI_VIDEO_NONE)
4109                 return -ENODEV;
4110
4111         enable = 0;
4112         disable = 0;
4113
4114         while ((cmd = next_cmd(&buf))) {
4115                 if (strlencmp(cmd, "lcd_enable") == 0) {
4116                         enable |= TP_ACPI_VIDEO_S_LCD;
4117                 } else if (strlencmp(cmd, "lcd_disable") == 0) {
4118                         disable |= TP_ACPI_VIDEO_S_LCD;
4119                 } else if (strlencmp(cmd, "crt_enable") == 0) {
4120                         enable |= TP_ACPI_VIDEO_S_CRT;
4121                 } else if (strlencmp(cmd, "crt_disable") == 0) {
4122                         disable |= TP_ACPI_VIDEO_S_CRT;
4123                 } else if (video_supported == TPACPI_VIDEO_NEW &&
4124                            strlencmp(cmd, "dvi_enable") == 0) {
4125                         enable |= TP_ACPI_VIDEO_S_DVI;
4126                 } else if (video_supported == TPACPI_VIDEO_NEW &&
4127                            strlencmp(cmd, "dvi_disable") == 0) {
4128                         disable |= TP_ACPI_VIDEO_S_DVI;
4129                 } else if (strlencmp(cmd, "auto_enable") == 0) {
4130                         res = video_autosw_set(1);
4131                         if (res)
4132                                 return res;
4133                 } else if (strlencmp(cmd, "auto_disable") == 0) {
4134                         res = video_autosw_set(0);
4135                         if (res)
4136                                 return res;
4137                 } else if (strlencmp(cmd, "video_switch") == 0) {
4138                         res = video_outputsw_cycle();
4139                         if (res)
4140                                 return res;
4141                 } else if (strlencmp(cmd, "expand_toggle") == 0) {
4142                         res = video_expand_toggle();
4143                         if (res)
4144                                 return res;
4145                 } else
4146                         return -EINVAL;
4147         }
4148
4149         if (enable || disable) {
4150                 status = video_outputsw_get();
4151                 if (status < 0)
4152                         return status;
4153                 res = video_outputsw_set((status & ~disable) | enable);
4154                 if (res)
4155                         return res;
4156         }
4157
4158         return 0;
4159 }
4160
4161 static struct ibm_struct video_driver_data = {
4162         .name = "video",
4163         .read = video_read,
4164         .write = video_write,
4165         .exit = video_exit,
4166 };
4167
4168 #endif /* CONFIG_THINKPAD_ACPI_VIDEO */
4169
4170 /*************************************************************************
4171  * Light (thinklight) subdriver
4172  */
4173
4174 TPACPI_HANDLE(lght, root, "\\LGHT");    /* A21e, A2xm/p, T20-22, X20-21 */
4175 TPACPI_HANDLE(ledb, ec, "LEDB");                /* G4x */
4176
4177 static int light_get_status(void)
4178 {
4179         int status = 0;
4180
4181         if (tp_features.light_status) {
4182                 if (!acpi_evalf(ec_handle, &status, "KBLT", "d"))
4183                         return -EIO;
4184                 return (!!status);
4185         }
4186
4187         return -ENXIO;
4188 }
4189
4190 static int light_set_status(int status)
4191 {
4192         int rc;
4193
4194         if (tp_features.light) {
4195                 if (cmos_handle) {
4196                         rc = acpi_evalf(cmos_handle, NULL, NULL, "vd",
4197                                         (status)?
4198                                                 TP_CMOS_THINKLIGHT_ON :
4199                                                 TP_CMOS_THINKLIGHT_OFF);
4200                 } else {
4201                         rc = acpi_evalf(lght_handle, NULL, NULL, "vd",
4202                                         (status)? 1 : 0);
4203                 }
4204                 return (rc)? 0 : -EIO;
4205         }
4206
4207         return -ENXIO;
4208 }
4209
4210 static void light_set_status_worker(struct work_struct *work)
4211 {
4212         struct tpacpi_led_classdev *data =
4213                         container_of(work, struct tpacpi_led_classdev, work);
4214
4215         if (likely(tpacpi_lifecycle == TPACPI_LIFE_RUNNING))
4216                 light_set_status((data->new_brightness != LED_OFF));
4217 }
4218
4219 static void light_sysfs_set(struct led_classdev *led_cdev,
4220                         enum led_brightness brightness)
4221 {
4222         struct tpacpi_led_classdev *data =
4223                 container_of(led_cdev,
4224                              struct tpacpi_led_classdev,
4225                              led_classdev);
4226         data->new_brightness = brightness;
4227         queue_work(tpacpi_wq, &data->work);
4228 }
4229
4230 static enum led_brightness light_sysfs_get(struct led_classdev *led_cdev)
4231 {
4232         return (light_get_status() == 1)? LED_FULL : LED_OFF;
4233 }
4234
4235 static struct tpacpi_led_classdev tpacpi_led_thinklight = {
4236         .led_classdev = {
4237                 .name           = "tpacpi::thinklight",
4238                 .brightness_set = &light_sysfs_set,
4239                 .brightness_get = &light_sysfs_get,
4240         }
4241 };
4242
4243 static int __init light_init(struct ibm_init_struct *iibm)
4244 {
4245         int rc;
4246
4247         vdbg_printk(TPACPI_DBG_INIT, "initializing light subdriver\n");
4248
4249         TPACPI_ACPIHANDLE_INIT(ledb);
4250         TPACPI_ACPIHANDLE_INIT(lght);
4251         TPACPI_ACPIHANDLE_INIT(cmos);
4252         INIT_WORK(&tpacpi_led_thinklight.work, light_set_status_worker);
4253
4254         /* light not supported on 570, 600e/x, 770e, 770x, G4x, R30, R31 */
4255         tp_features.light = (cmos_handle || lght_handle) && !ledb_handle;
4256
4257         if (tp_features.light)
4258                 /* light status not supported on
4259                    570, 600e/x, 770e, 770x, G4x, R30, R31, R32, X20 */
4260                 tp_features.light_status =
4261                         acpi_evalf(ec_handle, NULL, "KBLT", "qv");
4262
4263         vdbg_printk(TPACPI_DBG_INIT, "light is %s, light status is %s\n",
4264                 str_supported(tp_features.light),
4265                 str_supported(tp_features.light_status));
4266
4267         if (!tp_features.light)
4268                 return 1;
4269
4270         rc = led_classdev_register(&tpacpi_pdev->dev,
4271                                    &tpacpi_led_thinklight.led_classdev);
4272
4273         if (rc < 0) {
4274                 tp_features.light = 0;
4275                 tp_features.light_status = 0;
4276         } else  {
4277                 rc = 0;
4278         }
4279
4280         return rc;
4281 }
4282
4283 static void light_exit(void)
4284 {
4285         led_classdev_unregister(&tpacpi_led_thinklight.led_classdev);
4286         if (work_pending(&tpacpi_led_thinklight.work))
4287                 flush_workqueue(tpacpi_wq);
4288 }
4289
4290 static int light_read(char *p)
4291 {
4292         int len = 0;
4293         int status;
4294
4295         if (!tp_features.light) {
4296                 len += sprintf(p + len, "status:\t\tnot supported\n");
4297         } else if (!tp_features.light_status) {
4298                 len += sprintf(p + len, "status:\t\tunknown\n");
4299                 len += sprintf(p + len, "commands:\ton, off\n");
4300         } else {
4301                 status = light_get_status();
4302                 if (status < 0)
4303                         return status;
4304                 len += sprintf(p + len, "status:\t\t%s\n", onoff(status, 0));
4305                 len += sprintf(p + len, "commands:\ton, off\n");
4306         }
4307
4308         return len;
4309 }
4310
4311 static int light_write(char *buf)
4312 {
4313         char *cmd;
4314         int newstatus = 0;
4315
4316         if (!tp_features.light)
4317                 return -ENODEV;
4318
4319         while ((cmd = next_cmd(&buf))) {
4320                 if (strlencmp(cmd, "on") == 0) {
4321                         newstatus = 1;
4322                 } else if (strlencmp(cmd, "off") == 0) {
4323                         newstatus = 0;
4324                 } else
4325                         return -EINVAL;
4326         }
4327
4328         return light_set_status(newstatus);
4329 }
4330
4331 static struct ibm_struct light_driver_data = {
4332         .name = "light",
4333         .read = light_read,
4334         .write = light_write,
4335         .exit = light_exit,
4336 };
4337
4338 /*************************************************************************
4339  * Dock subdriver
4340  */
4341
4342 #ifdef CONFIG_THINKPAD_ACPI_DOCK
4343
4344 static void dock_notify(struct ibm_struct *ibm, u32 event);
4345 static int dock_read(char *p);
4346 static int dock_write(char *buf);
4347
4348 TPACPI_HANDLE(dock, root, "\\_SB.GDCK", /* X30, X31, X40 */
4349            "\\_SB.PCI0.DOCK",   /* 600e/x,770e,770x,A2xm/p,T20-22,X20-21 */
4350            "\\_SB.PCI0.PCI1.DOCK",      /* all others */
4351            "\\_SB.PCI.ISA.SLCE",        /* 570 */
4352     );                          /* A21e,G4x,R30,R31,R32,R40,R40e,R50e */
4353
4354 /* don't list other alternatives as we install a notify handler on the 570 */
4355 TPACPI_HANDLE(pci, root, "\\_SB.PCI");  /* 570 */
4356
4357 static const struct acpi_device_id ibm_pci_device_ids[] = {
4358         {PCI_ROOT_HID_STRING, 0},
4359         {"", 0},
4360 };
4361
4362 static struct tp_acpi_drv_struct ibm_dock_acpidriver[2] = {
4363         {
4364          .notify = dock_notify,
4365          .handle = &dock_handle,
4366          .type = ACPI_SYSTEM_NOTIFY,
4367         },
4368         {
4369         /* THIS ONE MUST NEVER BE USED FOR DRIVER AUTOLOADING.
4370          * We just use it to get notifications of dock hotplug
4371          * in very old thinkpads */
4372          .hid = ibm_pci_device_ids,
4373          .notify = dock_notify,
4374          .handle = &pci_handle,
4375          .type = ACPI_SYSTEM_NOTIFY,
4376         },
4377 };
4378
4379 static struct ibm_struct dock_driver_data[2] = {
4380         {
4381          .name = "dock",
4382          .read = dock_read,
4383          .write = dock_write,
4384          .acpi = &ibm_dock_acpidriver[0],
4385         },
4386         {
4387          .name = "dock",
4388          .acpi = &ibm_dock_acpidriver[1],
4389         },
4390 };
4391
4392 #define dock_docked() (_sta(dock_handle) & 1)
4393
4394 static int __init dock_init(struct ibm_init_struct *iibm)
4395 {
4396         vdbg_printk(TPACPI_DBG_INIT, "initializing dock subdriver\n");
4397
4398         TPACPI_ACPIHANDLE_INIT(dock);
4399
4400         vdbg_printk(TPACPI_DBG_INIT, "dock is %s\n",
4401                 str_supported(dock_handle != NULL));
4402
4403         return (dock_handle)? 0 : 1;
4404 }
4405
4406 static int __init dock_init2(struct ibm_init_struct *iibm)
4407 {
4408         int dock2_needed;
4409
4410         vdbg_printk(TPACPI_DBG_INIT, "initializing dock subdriver part 2\n");
4411
4412         if (dock_driver_data[0].flags.acpi_driver_registered &&
4413             dock_driver_data[0].flags.acpi_notify_installed) {
4414                 TPACPI_ACPIHANDLE_INIT(pci);
4415                 dock2_needed = (pci_handle != NULL);
4416                 vdbg_printk(TPACPI_DBG_INIT,
4417                             "dock PCI handler for the TP 570 is %s\n",
4418                             str_supported(dock2_needed));
4419         } else {
4420                 vdbg_printk(TPACPI_DBG_INIT,
4421                 "dock subdriver part 2 not required\n");
4422                 dock2_needed = 0;
4423         }
4424
4425         return (dock2_needed)? 0 : 1;
4426 }
4427
4428 static void dock_notify(struct ibm_struct *ibm, u32 event)
4429 {
4430         int docked = dock_docked();
4431         int pci = ibm->acpi->hid && ibm->acpi->device &&
4432                 acpi_match_device_ids(ibm->acpi->device, ibm_pci_device_ids);
4433         int data;
4434
4435         if (event == 1 && !pci) /* 570 */
4436                 data = 1;       /* button */
4437         else if (event == 1 && pci)     /* 570 */
4438                 data = 3;       /* dock */
4439         else if (event == 3 && docked)
4440                 data = 1;       /* button */
4441         else if (event == 3 && !docked)
4442                 data = 2;       /* undock */
4443         else if (event == 0 && docked)
4444                 data = 3;       /* dock */
4445         else {
4446                 printk(TPACPI_ERR "unknown dock event %d, status %d\n",
4447                        event, _sta(dock_handle));
4448                 data = 0;       /* unknown */
4449         }
4450         acpi_bus_generate_proc_event(ibm->acpi->device, event, data);
4451         acpi_bus_generate_netlink_event(ibm->acpi->device->pnp.device_class,
4452                                           dev_name(&ibm->acpi->device->dev),
4453                                           event, data);
4454 }
4455
4456 static int dock_read(char *p)
4457 {
4458         int len = 0;
4459         int docked = dock_docked();
4460
4461         if (!dock_handle)
4462                 len += sprintf(p + len, "status:\t\tnot supported\n");
4463         else if (!docked)
4464                 len += sprintf(p + len, "status:\t\tundocked\n");
4465         else {
4466                 len += sprintf(p + len, "status:\t\tdocked\n");
4467                 len += sprintf(p + len, "commands:\tdock, undock\n");
4468         }
4469
4470         return len;
4471 }
4472
4473 static int dock_write(char *buf)
4474 {
4475         char *cmd;
4476
4477         if (!dock_docked())
4478                 return -ENODEV;
4479
4480         while ((cmd = next_cmd(&buf))) {
4481                 if (strlencmp(cmd, "undock") == 0) {
4482                         if (!acpi_evalf(dock_handle, NULL, "_DCK", "vd", 0) ||
4483                             !acpi_evalf(dock_handle, NULL, "_EJ0", "vd", 1))
4484                                 return -EIO;
4485                 } else if (strlencmp(cmd, "dock") == 0) {
4486                         if (!acpi_evalf(dock_handle, NULL, "_DCK", "vd", 1))
4487                                 return -EIO;
4488                 } else
4489                         return -EINVAL;
4490         }
4491
4492         return 0;
4493 }
4494
4495 #endif /* CONFIG_THINKPAD_ACPI_DOCK */
4496
4497 /*************************************************************************
4498  * Bay subdriver
4499  */
4500
4501 #ifdef CONFIG_THINKPAD_ACPI_BAY
4502
4503 TPACPI_HANDLE(bay, root, "\\_SB.PCI.IDE.SECN.MAST",     /* 570 */
4504            "\\_SB.PCI0.IDE0.IDES.IDSM", /* 600e/x, 770e, 770x */
4505            "\\_SB.PCI0.SATA.SCND.MSTR", /* T60, X60, Z60 */
4506            "\\_SB.PCI0.IDE0.SCND.MSTR", /* all others */
4507            );                           /* A21e, R30, R31 */
4508 TPACPI_HANDLE(bay_ej, bay, "_EJ3",      /* 600e/x, A2xm/p, A3x */
4509            "_EJ0",              /* all others */
4510            );                   /* 570,A21e,G4x,R30,R31,R32,R40e,R50e */
4511 TPACPI_HANDLE(bay2, root, "\\_SB.PCI0.IDE0.PRIM.SLAV",  /* A3x, R32 */
4512            "\\_SB.PCI0.IDE0.IDEP.IDPS", /* 600e/x, 770e, 770x */
4513            );                           /* all others */
4514 TPACPI_HANDLE(bay2_ej, bay2, "_EJ3",    /* 600e/x, 770e, A3x */
4515            "_EJ0",                      /* 770x */
4516            );                           /* all others */
4517
4518 static int __init bay_init(struct ibm_init_struct *iibm)
4519 {
4520         vdbg_printk(TPACPI_DBG_INIT, "initializing bay subdriver\n");
4521
4522         TPACPI_ACPIHANDLE_INIT(bay);
4523         if (bay_handle)
4524                 TPACPI_ACPIHANDLE_INIT(bay_ej);
4525         TPACPI_ACPIHANDLE_INIT(bay2);
4526         if (bay2_handle)
4527                 TPACPI_ACPIHANDLE_INIT(bay2_ej);
4528
4529         tp_features.bay_status = bay_handle &&
4530                 acpi_evalf(bay_handle, NULL, "_STA", "qv");
4531         tp_features.bay_status2 = bay2_handle &&
4532                 acpi_evalf(bay2_handle, NULL, "_STA", "qv");
4533
4534         tp_features.bay_eject = bay_handle && bay_ej_handle &&
4535                 (strlencmp(bay_ej_path, "_EJ0") == 0 || experimental);
4536         tp_features.bay_eject2 = bay2_handle && bay2_ej_handle &&
4537                 (strlencmp(bay2_ej_path, "_EJ0") == 0 || experimental);
4538
4539         vdbg_printk(TPACPI_DBG_INIT,
4540                 "bay 1: status %s, eject %s; bay 2: status %s, eject %s\n",
4541                 str_supported(tp_features.bay_status),
4542                 str_supported(tp_features.bay_eject),
4543                 str_supported(tp_features.bay_status2),
4544                 str_supported(tp_features.bay_eject2));
4545
4546         return (tp_features.bay_status || tp_features.bay_eject ||
4547                 tp_features.bay_status2 || tp_features.bay_eject2)? 0 : 1;
4548 }
4549
4550 static void bay_notify(struct ibm_struct *ibm, u32 event)
4551 {
4552         acpi_bus_generate_proc_event(ibm->acpi->device, event, 0);
4553         acpi_bus_generate_netlink_event(ibm->acpi->device->pnp.device_class,
4554                                           dev_name(&ibm->acpi->device->dev),
4555                                           event, 0);
4556 }
4557
4558 #define bay_occupied(b) (_sta(b##_handle) & 1)
4559
4560 static int bay_read(char *p)
4561 {
4562         int len = 0;
4563         int occupied = bay_occupied(bay);
4564         int occupied2 = bay_occupied(bay2);
4565         int eject, eject2;
4566
4567         len += sprintf(p + len, "status:\t\t%s\n",
4568                 tp_features.bay_status ?
4569                         (occupied ? "occupied" : "unoccupied") :
4570                                 "not supported");
4571         if (tp_features.bay_status2)
4572                 len += sprintf(p + len, "status2:\t%s\n", occupied2 ?
4573                                "occupied" : "unoccupied");
4574
4575         eject = tp_features.bay_eject && occupied;
4576         eject2 = tp_features.bay_eject2 && occupied2;
4577
4578         if (eject && eject2)
4579                 len += sprintf(p + len, "commands:\teject, eject2\n");
4580         else if (eject)
4581                 len += sprintf(p + len, "commands:\teject\n");
4582         else if (eject2)
4583                 len += sprintf(p + len, "commands:\teject2\n");
4584
4585         return len;
4586 }
4587
4588 static int bay_write(char *buf)
4589 {
4590         char *cmd;
4591
4592         if (!tp_features.bay_eject && !tp_features.bay_eject2)
4593                 return -ENODEV;
4594
4595         while ((cmd = next_cmd(&buf))) {
4596                 if (tp_features.bay_eject && strlencmp(cmd, "eject") == 0) {
4597                         if (!acpi_evalf(bay_ej_handle, NULL, NULL, "vd", 1))
4598                                 return -EIO;
4599                 } else if (tp_features.bay_eject2 &&
4600                            strlencmp(cmd, "eject2") == 0) {
4601                         if (!acpi_evalf(bay2_ej_handle, NULL, NULL, "vd", 1))
4602                                 return -EIO;
4603                 } else
4604                         return -EINVAL;
4605         }
4606
4607         return 0;
4608 }
4609
4610 static struct tp_acpi_drv_struct ibm_bay_acpidriver = {
4611         .notify = bay_notify,
4612         .handle = &bay_handle,
4613         .type = ACPI_SYSTEM_NOTIFY,
4614 };
4615
4616 static struct ibm_struct bay_driver_data = {
4617         .name = "bay",
4618         .read = bay_read,
4619         .write = bay_write,
4620         .acpi = &ibm_bay_acpidriver,
4621 };
4622
4623 #endif /* CONFIG_THINKPAD_ACPI_BAY */
4624
4625 /*************************************************************************
4626  * CMOS subdriver
4627  */
4628
4629 /* sysfs cmos_command -------------------------------------------------- */
4630 static ssize_t cmos_command_store(struct device *dev,
4631                             struct device_attribute *attr,
4632                             const char *buf, size_t count)
4633 {
4634         unsigned long cmos_cmd;
4635         int res;
4636
4637         if (parse_strtoul(buf, 21, &cmos_cmd))
4638                 return -EINVAL;
4639
4640         res = issue_thinkpad_cmos_command(cmos_cmd);
4641         return (res)? res : count;
4642 }
4643
4644 static struct device_attribute dev_attr_cmos_command =
4645         __ATTR(cmos_command, S_IWUSR, NULL, cmos_command_store);
4646
4647 /* --------------------------------------------------------------------- */
4648
4649 static int __init cmos_init(struct ibm_init_struct *iibm)
4650 {
4651         int res;
4652
4653         vdbg_printk(TPACPI_DBG_INIT,
4654                 "initializing cmos commands subdriver\n");
4655
4656         TPACPI_ACPIHANDLE_INIT(cmos);
4657
4658         vdbg_printk(TPACPI_DBG_INIT, "cmos commands are %s\n",
4659                 str_supported(cmos_handle != NULL));
4660
4661         res = device_create_file(&tpacpi_pdev->dev, &dev_attr_cmos_command);
4662         if (res)
4663                 return res;
4664
4665         return (cmos_handle)? 0 : 1;
4666 }
4667
4668 static void cmos_exit(void)
4669 {
4670         device_remove_file(&tpacpi_pdev->dev, &dev_attr_cmos_command);
4671 }
4672
4673 static int cmos_read(char *p)
4674 {
4675         int len = 0;
4676
4677         /* cmos not supported on 570, 600e/x, 770e, 770x, A21e, A2xm/p,
4678            R30, R31, T20-22, X20-21 */
4679         if (!cmos_handle)
4680                 len += sprintf(p + len, "status:\t\tnot supported\n");
4681         else {
4682                 len += sprintf(p + len, "status:\t\tsupported\n");
4683                 len += sprintf(p + len, "commands:\t<cmd> (<cmd> is 0-21)\n");
4684         }
4685
4686         return len;
4687 }
4688
4689 static int cmos_write(char *buf)
4690 {
4691         char *cmd;
4692         int cmos_cmd, res;
4693
4694         while ((cmd = next_cmd(&buf))) {
4695                 if (sscanf(cmd, "%u", &cmos_cmd) == 1 &&
4696                     cmos_cmd >= 0 && cmos_cmd <= 21) {
4697                         /* cmos_cmd set */
4698                 } else
4699                         return -EINVAL;
4700
4701                 res = issue_thinkpad_cmos_command(cmos_cmd);
4702                 if (res)
4703                         return res;
4704         }
4705
4706         return 0;
4707 }
4708
4709 static struct ibm_struct cmos_driver_data = {
4710         .name = "cmos",
4711         .read = cmos_read,
4712         .write = cmos_write,
4713         .exit = cmos_exit,
4714 };
4715
4716 /*************************************************************************
4717  * LED subdriver
4718  */
4719
4720 enum led_access_mode {
4721         TPACPI_LED_NONE = 0,
4722         TPACPI_LED_570, /* 570 */
4723         TPACPI_LED_OLD, /* 600e/x, 770e, 770x, A21e, A2xm/p, T20-22, X20-21 */
4724         TPACPI_LED_NEW, /* all others */
4725 };
4726
4727 enum {  /* For TPACPI_LED_OLD */
4728         TPACPI_LED_EC_HLCL = 0x0c,      /* EC reg to get led to power on */
4729         TPACPI_LED_EC_HLBL = 0x0d,      /* EC reg to blink a lit led */
4730         TPACPI_LED_EC_HLMS = 0x0e,      /* EC reg to select led to command */
4731 };
4732
4733 enum led_status_t {
4734         TPACPI_LED_OFF = 0,
4735         TPACPI_LED_ON,
4736         TPACPI_LED_BLINK,
4737 };
4738
4739 static enum led_access_mode led_supported;
4740
4741 TPACPI_HANDLE(led, ec, "SLED",  /* 570 */
4742            "SYSL",              /* 600e/x, 770e, 770x, A21e, A2xm/p, */
4743                                 /* T20-22, X20-21 */
4744            "LED",               /* all others */
4745            );                   /* R30, R31 */
4746
4747 #define TPACPI_LED_NUMLEDS 8
4748 static struct tpacpi_led_classdev *tpacpi_leds;
4749 static enum led_status_t tpacpi_led_state_cache[TPACPI_LED_NUMLEDS];
4750 static const char * const tpacpi_led_names[TPACPI_LED_NUMLEDS] = {
4751         /* there's a limit of 19 chars + NULL before 2.6.26 */
4752         "tpacpi::power",
4753         "tpacpi:orange:batt",
4754         "tpacpi:green:batt",
4755         "tpacpi::dock_active",
4756         "tpacpi::bay_active",
4757         "tpacpi::dock_batt",
4758         "tpacpi::unknown_led",
4759         "tpacpi::standby",
4760 };
4761 #define TPACPI_SAFE_LEDS        0x0081U
4762
4763 static inline bool tpacpi_is_led_restricted(const unsigned int led)
4764 {
4765 #ifdef CONFIG_THINKPAD_ACPI_UNSAFE_LEDS
4766         return false;
4767 #else
4768         return (TPACPI_SAFE_LEDS & (1 << led)) == 0;
4769 #endif
4770 }
4771
4772 static int led_get_status(const unsigned int led)
4773 {
4774         int status;
4775         enum led_status_t led_s;
4776
4777         switch (led_supported) {
4778         case TPACPI_LED_570:
4779                 if (!acpi_evalf(ec_handle,
4780                                 &status, "GLED", "dd", 1 << led))
4781                         return -EIO;
4782                 led_s = (status == 0)?
4783                                 TPACPI_LED_OFF :
4784                                 ((status == 1)?
4785                                         TPACPI_LED_ON :
4786                                         TPACPI_LED_BLINK);
4787                 tpacpi_led_state_cache[led] = led_s;
4788                 return led_s;
4789         default:
4790                 return -ENXIO;
4791         }
4792
4793         /* not reached */
4794 }
4795
4796 static int led_set_status(const unsigned int led,
4797                           const enum led_status_t ledstatus)
4798 {
4799         /* off, on, blink. Index is led_status_t */
4800         static const unsigned int led_sled_arg1[] = { 0, 1, 3 };
4801         static const unsigned int led_led_arg1[] = { 0, 0x80, 0xc0 };
4802
4803         int rc = 0;
4804
4805         switch (led_supported) {
4806         case TPACPI_LED_570:
4807                 /* 570 */
4808                 if (unlikely(led > 7))
4809                         return -EINVAL;
4810                 if (unlikely(tpacpi_is_led_restricted(led)))
4811                         return -EPERM;
4812                 if (!acpi_evalf(led_handle, NULL, NULL, "vdd",
4813                                 (1 << led), led_sled_arg1[ledstatus]))
4814                         rc = -EIO;
4815                 break;
4816         case TPACPI_LED_OLD:
4817                 /* 600e/x, 770e, 770x, A21e, A2xm/p, T20-22, X20 */
4818                 if (unlikely(led > 7))
4819                         return -EINVAL;
4820                 if (unlikely(tpacpi_is_led_restricted(led)))
4821                         return -EPERM;
4822                 rc = ec_write(TPACPI_LED_EC_HLMS, (1 << led));
4823                 if (rc >= 0)
4824                         rc = ec_write(TPACPI_LED_EC_HLBL,
4825                                       (ledstatus == TPACPI_LED_BLINK) << led);
4826                 if (rc >= 0)
4827                         rc = ec_write(TPACPI_LED_EC_HLCL,
4828                                       (ledstatus != TPACPI_LED_OFF) << led);
4829                 break;
4830         case TPACPI_LED_NEW:
4831                 /* all others */
4832                 if (unlikely(led >= TPACPI_LED_NUMLEDS))
4833                         return -EINVAL;
4834                 if (unlikely(tpacpi_is_led_restricted(led)))
4835                         return -EPERM;
4836                 if (!acpi_evalf(led_handle, NULL, NULL, "vdd",
4837                                 led, led_led_arg1[ledstatus]))
4838                         rc = -EIO;
4839                 break;
4840         default:
4841                 rc = -ENXIO;
4842         }
4843
4844         if (!rc)
4845                 tpacpi_led_state_cache[led] = ledstatus;
4846
4847         return rc;
4848 }
4849
4850 static void led_sysfs_set_status(unsigned int led,
4851                                  enum led_brightness brightness)
4852 {
4853         led_set_status(led,
4854                         (brightness == LED_OFF) ?
4855                         TPACPI_LED_OFF :
4856                         (tpacpi_led_state_cache[led] == TPACPI_LED_BLINK) ?
4857                                 TPACPI_LED_BLINK : TPACPI_LED_ON);
4858 }
4859
4860 static void led_set_status_worker(struct work_struct *work)
4861 {
4862         struct tpacpi_led_classdev *data =
4863                 container_of(work, struct tpacpi_led_classdev, work);
4864
4865         if (likely(tpacpi_lifecycle == TPACPI_LIFE_RUNNING))
4866                 led_sysfs_set_status(data->led, data->new_brightness);
4867 }
4868
4869 static void led_sysfs_set(struct led_classdev *led_cdev,
4870                         enum led_brightness brightness)
4871 {
4872         struct tpacpi_led_classdev *data = container_of(led_cdev,
4873                              struct tpacpi_led_classdev, led_classdev);
4874
4875         data->new_brightness = brightness;
4876         queue_work(tpacpi_wq, &data->work);
4877 }
4878
4879 static int led_sysfs_blink_set(struct led_classdev *led_cdev,
4880                         unsigned long *delay_on, unsigned long *delay_off)
4881 {
4882         struct tpacpi_led_classdev *data = container_of(led_cdev,
4883                              struct tpacpi_led_classdev, led_classdev);
4884
4885         /* Can we choose the flash rate? */
4886         if (*delay_on == 0 && *delay_off == 0) {
4887                 /* yes. set them to the hardware blink rate (1 Hz) */
4888                 *delay_on = 500; /* ms */
4889                 *delay_off = 500; /* ms */
4890         } else if ((*delay_on != 500) || (*delay_off != 500))
4891                 return -EINVAL;
4892
4893         data->new_brightness = TPACPI_LED_BLINK;
4894         queue_work(tpacpi_wq, &data->work);
4895
4896         return 0;
4897 }
4898
4899 static enum led_brightness led_sysfs_get(struct led_classdev *led_cdev)
4900 {
4901         int rc;
4902
4903         struct tpacpi_led_classdev *data = container_of(led_cdev,
4904                              struct tpacpi_led_classdev, led_classdev);
4905
4906         rc = led_get_status(data->led);
4907
4908         if (rc == TPACPI_LED_OFF || rc < 0)
4909                 rc = LED_OFF;   /* no error handling in led class :( */
4910         else
4911                 rc = LED_FULL;
4912
4913         return rc;
4914 }
4915
4916 static void led_exit(void)
4917 {
4918         unsigned int i;
4919
4920         for (i = 0; i < TPACPI_LED_NUMLEDS; i++) {
4921                 if (tpacpi_leds[i].led_classdev.name)
4922                         led_classdev_unregister(&tpacpi_leds[i].led_classdev);
4923         }
4924
4925         kfree(tpacpi_leds);
4926 }
4927
4928 static int __init tpacpi_init_led(unsigned int led)
4929 {
4930         int rc;
4931
4932         tpacpi_leds[led].led = led;
4933
4934         tpacpi_leds[led].led_classdev.brightness_set = &led_sysfs_set;
4935         tpacpi_leds[led].led_classdev.blink_set = &led_sysfs_blink_set;
4936         if (led_supported == TPACPI_LED_570)
4937                 tpacpi_leds[led].led_classdev.brightness_get =
4938                                                 &led_sysfs_get;
4939
4940         tpacpi_leds[led].led_classdev.name = tpacpi_led_names[led];
4941
4942         INIT_WORK(&tpacpi_leds[led].work, led_set_status_worker);
4943
4944         rc = led_classdev_register(&tpacpi_pdev->dev,
4945                                 &tpacpi_leds[led].led_classdev);
4946         if (rc < 0)
4947                 tpacpi_leds[led].led_classdev.name = NULL;
4948
4949         return rc;
4950 }
4951
4952 static int __init led_init(struct ibm_init_struct *iibm)
4953 {
4954         unsigned int i;
4955         int rc;
4956
4957         vdbg_printk(TPACPI_DBG_INIT, "initializing LED subdriver\n");
4958
4959         TPACPI_ACPIHANDLE_INIT(led);
4960
4961         if (!led_handle)
4962                 /* led not supported on R30, R31 */
4963                 led_supported = TPACPI_LED_NONE;
4964         else if (strlencmp(led_path, "SLED") == 0)
4965                 /* 570 */
4966                 led_supported = TPACPI_LED_570;
4967         else if (strlencmp(led_path, "SYSL") == 0)
4968                 /* 600e/x, 770e, 770x, A21e, A2xm/p, T20-22, X20-21 */
4969                 led_supported = TPACPI_LED_OLD;
4970         else
4971                 /* all others */
4972                 led_supported = TPACPI_LED_NEW;
4973
4974         vdbg_printk(TPACPI_DBG_INIT, "LED commands are %s, mode %d\n",
4975                 str_supported(led_supported), led_supported);
4976
4977         tpacpi_leds = kzalloc(sizeof(*tpacpi_leds) * TPACPI_LED_NUMLEDS,
4978                               GFP_KERNEL);
4979         if (!tpacpi_leds) {
4980                 printk(TPACPI_ERR "Out of memory for LED data\n");
4981                 return -ENOMEM;
4982         }
4983
4984         for (i = 0; i < TPACPI_LED_NUMLEDS; i++) {
4985                 if (!tpacpi_is_led_restricted(i)) {
4986                         rc = tpacpi_init_led(i);
4987                         if (rc < 0) {
4988                                 led_exit();
4989                                 return rc;
4990                         }
4991                 }
4992         }
4993
4994 #ifdef CONFIG_THINKPAD_ACPI_UNSAFE_LEDS
4995         if (led_supported != TPACPI_LED_NONE)
4996                 printk(TPACPI_NOTICE
4997                         "warning: userspace override of important "
4998                         "firmware LEDs is enabled\n");
4999 #endif
5000         return (led_supported != TPACPI_LED_NONE)? 0 : 1;
5001 }
5002
5003 #define str_led_status(s) \
5004         ((s) == TPACPI_LED_OFF ? "off" : \
5005                 ((s) == TPACPI_LED_ON ? "on" : "blinking"))
5006
5007 static int led_read(char *p)
5008 {
5009         int len = 0;
5010
5011         if (!led_supported) {
5012                 len += sprintf(p + len, "status:\t\tnot supported\n");
5013                 return len;
5014         }
5015         len += sprintf(p + len, "status:\t\tsupported\n");
5016
5017         if (led_supported == TPACPI_LED_570) {
5018                 /* 570 */
5019                 int i, status;
5020                 for (i = 0; i < 8; i++) {
5021                         status = led_get_status(i);
5022                         if (status < 0)
5023                                 return -EIO;
5024                         len += sprintf(p + len, "%d:\t\t%s\n",
5025                                        i, str_led_status(status));
5026                 }
5027         }
5028
5029         len += sprintf(p + len, "commands:\t"
5030                        "<led> on, <led> off, <led> blink (<led> is 0-7)\n");
5031
5032         return len;
5033 }
5034
5035 static int led_write(char *buf)
5036 {
5037         char *cmd;
5038         int led, rc;
5039         enum led_status_t s;
5040
5041         if (!led_supported)
5042                 return -ENODEV;
5043
5044         while ((cmd = next_cmd(&buf))) {
5045                 if (sscanf(cmd, "%d", &led) != 1 || led < 0 || led > 7)
5046                         return -EINVAL;
5047
5048                 if (strstr(cmd, "off")) {
5049                         s = TPACPI_LED_OFF;
5050                 } else if (strstr(cmd, "on")) {
5051                         s = TPACPI_LED_ON;
5052                 } else if (strstr(cmd, "blink")) {
5053                         s = TPACPI_LED_BLINK;
5054                 } else {
5055                         return -EINVAL;
5056                 }
5057
5058                 rc = led_set_status(led, s);
5059                 if (rc < 0)
5060                         return rc;
5061         }
5062
5063         return 0;
5064 }
5065
5066 static struct ibm_struct led_driver_data = {
5067         .name = "led",
5068         .read = led_read,
5069         .write = led_write,
5070         .exit = led_exit,
5071 };
5072
5073 /*************************************************************************
5074  * Beep subdriver
5075  */
5076
5077 TPACPI_HANDLE(beep, ec, "BEEP");        /* all except R30, R31 */
5078
5079 static int __init beep_init(struct ibm_init_struct *iibm)
5080 {
5081         vdbg_printk(TPACPI_DBG_INIT, "initializing beep subdriver\n");
5082
5083         TPACPI_ACPIHANDLE_INIT(beep);
5084
5085         vdbg_printk(TPACPI_DBG_INIT, "beep is %s\n",
5086                 str_supported(beep_handle != NULL));
5087
5088         return (beep_handle)? 0 : 1;
5089 }
5090
5091 static int beep_read(char *p)
5092 {
5093         int len = 0;
5094
5095         if (!beep_handle)
5096                 len += sprintf(p + len, "status:\t\tnot supported\n");
5097         else {
5098                 len += sprintf(p + len, "status:\t\tsupported\n");
5099                 len += sprintf(p + len, "commands:\t<cmd> (<cmd> is 0-17)\n");
5100         }
5101
5102         return len;
5103 }
5104
5105 static int beep_write(char *buf)
5106 {
5107         char *cmd;
5108         int beep_cmd;
5109
5110         if (!beep_handle)
5111                 return -ENODEV;
5112
5113         while ((cmd = next_cmd(&buf))) {
5114                 if (sscanf(cmd, "%u", &beep_cmd) == 1 &&
5115                     beep_cmd >= 0 && beep_cmd <= 17) {
5116                         /* beep_cmd set */
5117                 } else
5118                         return -EINVAL;
5119                 if (!acpi_evalf(beep_handle, NULL, NULL, "vdd", beep_cmd, 0))
5120                         return -EIO;
5121         }
5122
5123         return 0;
5124 }
5125
5126 static struct ibm_struct beep_driver_data = {
5127         .name = "beep",
5128         .read = beep_read,
5129         .write = beep_write,
5130 };
5131
5132 /*************************************************************************
5133  * Thermal subdriver
5134  */
5135
5136 enum thermal_access_mode {
5137         TPACPI_THERMAL_NONE = 0,        /* No thermal support */
5138         TPACPI_THERMAL_ACPI_TMP07,      /* Use ACPI TMP0-7 */
5139         TPACPI_THERMAL_ACPI_UPDT,       /* Use ACPI TMP0-7 with UPDT */
5140         TPACPI_THERMAL_TPEC_8,          /* Use ACPI EC regs, 8 sensors */
5141         TPACPI_THERMAL_TPEC_16,         /* Use ACPI EC regs, 16 sensors */
5142 };
5143
5144 enum { /* TPACPI_THERMAL_TPEC_* */
5145         TP_EC_THERMAL_TMP0 = 0x78,      /* ACPI EC regs TMP 0..7 */
5146         TP_EC_THERMAL_TMP8 = 0xC0,      /* ACPI EC regs TMP 8..15 */
5147         TP_EC_THERMAL_TMP_NA = -128,    /* ACPI EC sensor not available */
5148 };
5149
5150 #define TPACPI_MAX_THERMAL_SENSORS 16   /* Max thermal sensors supported */
5151 struct ibm_thermal_sensors_struct {
5152         s32 temp[TPACPI_MAX_THERMAL_SENSORS];
5153 };
5154
5155 static enum thermal_access_mode thermal_read_mode;
5156
5157 /* idx is zero-based */
5158 static int thermal_get_sensor(int idx, s32 *value)
5159 {
5160         int t;
5161         s8 tmp;
5162         char tmpi[5];
5163
5164         t = TP_EC_THERMAL_TMP0;
5165
5166         switch (thermal_read_mode) {
5167 #if TPACPI_MAX_THERMAL_SENSORS >= 16
5168         case TPACPI_THERMAL_TPEC_16:
5169                 if (idx >= 8 && idx <= 15) {
5170                         t = TP_EC_THERMAL_TMP8;
5171                         idx -= 8;
5172                 }
5173                 /* fallthrough */
5174 #endif
5175         case TPACPI_THERMAL_TPEC_8:
5176                 if (idx <= 7) {
5177                         if (!acpi_ec_read(t + idx, &tmp))
5178                                 return -EIO;
5179                         *value = tmp * 1000;
5180                         return 0;
5181                 }
5182                 break;
5183
5184         case TPACPI_THERMAL_ACPI_UPDT:
5185                 if (idx <= 7) {
5186                         snprintf(tmpi, sizeof(tmpi), "TMP%c", '0' + idx);
5187                         if (!acpi_evalf(ec_handle, NULL, "UPDT", "v"))
5188                                 return -EIO;
5189                         if (!acpi_evalf(ec_handle, &t, tmpi, "d"))
5190                                 return -EIO;
5191                         *value = (t - 2732) * 100;
5192                         return 0;
5193                 }
5194                 break;
5195
5196         case TPACPI_THERMAL_ACPI_TMP07:
5197                 if (idx <= 7) {
5198                         snprintf(tmpi, sizeof(tmpi), "TMP%c", '0' + idx);
5199                         if (!acpi_evalf(ec_handle, &t, tmpi, "d"))
5200                                 return -EIO;
5201                         if (t > 127 || t < -127)
5202                                 t = TP_EC_THERMAL_TMP_NA;
5203                         *value = t * 1000;
5204                         return 0;
5205                 }
5206                 break;
5207
5208         case TPACPI_THERMAL_NONE:
5209         default:
5210                 return -ENOSYS;
5211         }
5212
5213         return -EINVAL;
5214 }
5215
5216 static int thermal_get_sensors(struct ibm_thermal_sensors_struct *s)
5217 {
5218         int res, i;
5219         int n;
5220
5221         n = 8;
5222         i = 0;
5223
5224         if (!s)
5225                 return -EINVAL;
5226
5227         if (thermal_read_mode == TPACPI_THERMAL_TPEC_16)
5228                 n = 16;
5229
5230         for (i = 0 ; i < n; i++) {
5231                 res = thermal_get_sensor(i, &s->temp[i]);
5232                 if (res)
5233                         return res;
5234         }
5235
5236         return n;
5237 }
5238
5239 /* sysfs temp##_input -------------------------------------------------- */
5240
5241 static ssize_t thermal_temp_input_show(struct device *dev,
5242                            struct device_attribute *attr,
5243                            char *buf)
5244 {
5245         struct sensor_device_attribute *sensor_attr =
5246                                         to_sensor_dev_attr(attr);
5247         int idx = sensor_attr->index;
5248         s32 value;
5249         int res;
5250
5251         res = thermal_get_sensor(idx, &value);
5252         if (res)
5253                 return res;
5254         if (value == TP_EC_THERMAL_TMP_NA * 1000)
5255                 return -ENXIO;
5256
5257         return snprintf(buf, PAGE_SIZE, "%d\n", value);
5258 }
5259
5260 #define THERMAL_SENSOR_ATTR_TEMP(_idxA, _idxB) \
5261          SENSOR_ATTR(temp##_idxA##_input, S_IRUGO, \
5262                      thermal_temp_input_show, NULL, _idxB)
5263
5264 static struct sensor_device_attribute sensor_dev_attr_thermal_temp_input[] = {
5265         THERMAL_SENSOR_ATTR_TEMP(1, 0),
5266         THERMAL_SENSOR_ATTR_TEMP(2, 1),
5267         THERMAL_SENSOR_ATTR_TEMP(3, 2),
5268         THERMAL_SENSOR_ATTR_TEMP(4, 3),
5269         THERMAL_SENSOR_ATTR_TEMP(5, 4),
5270         THERMAL_SENSOR_ATTR_TEMP(6, 5),
5271         THERMAL_SENSOR_ATTR_TEMP(7, 6),
5272         THERMAL_SENSOR_ATTR_TEMP(8, 7),
5273         THERMAL_SENSOR_ATTR_TEMP(9, 8),
5274         THERMAL_SENSOR_ATTR_TEMP(10, 9),
5275         THERMAL_SENSOR_ATTR_TEMP(11, 10),
5276         THERMAL_SENSOR_ATTR_TEMP(12, 11),
5277         THERMAL_SENSOR_ATTR_TEMP(13, 12),
5278         THERMAL_SENSOR_ATTR_TEMP(14, 13),
5279         THERMAL_SENSOR_ATTR_TEMP(15, 14),
5280         THERMAL_SENSOR_ATTR_TEMP(16, 15),
5281 };
5282
5283 #define THERMAL_ATTRS(X) \
5284         &sensor_dev_attr_thermal_temp_input[X].dev_attr.attr
5285
5286 static struct attribute *thermal_temp_input_attr[] = {
5287         THERMAL_ATTRS(8),
5288         THERMAL_ATTRS(9),
5289         THERMAL_ATTRS(10),
5290         THERMAL_ATTRS(11),
5291         THERMAL_ATTRS(12),
5292         THERMAL_ATTRS(13),
5293         THERMAL_ATTRS(14),
5294         THERMAL_ATTRS(15),
5295         THERMAL_ATTRS(0),
5296         THERMAL_ATTRS(1),
5297         THERMAL_ATTRS(2),
5298         THERMAL_ATTRS(3),
5299         THERMAL_ATTRS(4),
5300         THERMAL_ATTRS(5),
5301         THERMAL_ATTRS(6),
5302         THERMAL_ATTRS(7),
5303         NULL
5304 };
5305
5306 static const struct attribute_group thermal_temp_input16_group = {
5307         .attrs = thermal_temp_input_attr
5308 };
5309
5310 static const struct attribute_group thermal_temp_input8_group = {
5311         .attrs = &thermal_temp_input_attr[8]
5312 };
5313
5314 #undef THERMAL_SENSOR_ATTR_TEMP
5315 #undef THERMAL_ATTRS
5316
5317 /* --------------------------------------------------------------------- */
5318
5319 static int __init thermal_init(struct ibm_init_struct *iibm)
5320 {
5321         u8 t, ta1, ta2;
5322         int i;
5323         int acpi_tmp7;
5324         int res;
5325
5326         vdbg_printk(TPACPI_DBG_INIT, "initializing thermal subdriver\n");
5327
5328         acpi_tmp7 = acpi_evalf(ec_handle, NULL, "TMP7", "qv");
5329
5330         if (thinkpad_id.ec_model) {
5331                 /*
5332                  * Direct EC access mode: sensors at registers
5333                  * 0x78-0x7F, 0xC0-0xC7.  Registers return 0x00 for
5334                  * non-implemented, thermal sensors return 0x80 when
5335                  * not available
5336                  */
5337
5338                 ta1 = ta2 = 0;
5339                 for (i = 0; i < 8; i++) {
5340                         if (acpi_ec_read(TP_EC_THERMAL_TMP0 + i, &t)) {
5341                                 ta1 |= t;
5342                         } else {
5343                                 ta1 = 0;
5344                                 break;
5345                         }
5346                         if (acpi_ec_read(TP_EC_THERMAL_TMP8 + i, &t)) {
5347                                 ta2 |= t;
5348                         } else {
5349                                 ta1 = 0;
5350                                 break;
5351                         }
5352                 }
5353                 if (ta1 == 0) {
5354                         /* This is sheer paranoia, but we handle it anyway */
5355                         if (acpi_tmp7) {
5356                                 printk(TPACPI_ERR
5357                                        "ThinkPad ACPI EC access misbehaving, "
5358                                        "falling back to ACPI TMPx access "
5359                                        "mode\n");
5360                                 thermal_read_mode = TPACPI_THERMAL_ACPI_TMP07;
5361                         } else {
5362                                 printk(TPACPI_ERR
5363                                        "ThinkPad ACPI EC access misbehaving, "
5364                                        "disabling thermal sensors access\n");
5365                                 thermal_read_mode = TPACPI_THERMAL_NONE;
5366                         }
5367                 } else {
5368                         thermal_read_mode =
5369                             (ta2 != 0) ?
5370                             TPACPI_THERMAL_TPEC_16 : TPACPI_THERMAL_TPEC_8;
5371                 }
5372         } else if (acpi_tmp7) {
5373                 if (acpi_evalf(ec_handle, NULL, "UPDT", "qv")) {
5374                         /* 600e/x, 770e, 770x */
5375                         thermal_read_mode = TPACPI_THERMAL_ACPI_UPDT;
5376                 } else {
5377                         /* Standard ACPI TMPx access, max 8 sensors */
5378                         thermal_read_mode = TPACPI_THERMAL_ACPI_TMP07;
5379                 }
5380         } else {
5381                 /* temperatures not supported on 570, G4x, R30, R31, R32 */
5382                 thermal_read_mode = TPACPI_THERMAL_NONE;
5383         }
5384
5385         vdbg_printk(TPACPI_DBG_INIT, "thermal is %s, mode %d\n",
5386                 str_supported(thermal_read_mode != TPACPI_THERMAL_NONE),
5387                 thermal_read_mode);
5388
5389         switch (thermal_read_mode) {
5390         case TPACPI_THERMAL_TPEC_16:
5391                 res = sysfs_create_group(&tpacpi_sensors_pdev->dev.kobj,
5392                                 &thermal_temp_input16_group);
5393                 if (res)
5394                         return res;
5395                 break;
5396         case TPACPI_THERMAL_TPEC_8:
5397         case TPACPI_THERMAL_ACPI_TMP07:
5398         case TPACPI_THERMAL_ACPI_UPDT:
5399                 res = sysfs_create_group(&tpacpi_sensors_pdev->dev.kobj,
5400                                 &thermal_temp_input8_group);
5401                 if (res)
5402                         return res;
5403                 break;
5404         case TPACPI_THERMAL_NONE:
5405         default:
5406                 return 1;
5407         }
5408
5409         return 0;
5410 }
5411
5412 static void thermal_exit(void)
5413 {
5414         switch (thermal_read_mode) {
5415         case TPACPI_THERMAL_TPEC_16:
5416                 sysfs_remove_group(&tpacpi_sensors_pdev->dev.kobj,
5417                                    &thermal_temp_input16_group);
5418                 break;
5419         case TPACPI_THERMAL_TPEC_8:
5420         case TPACPI_THERMAL_ACPI_TMP07:
5421         case TPACPI_THERMAL_ACPI_UPDT:
5422                 sysfs_remove_group(&tpacpi_sensors_pdev->dev.kobj,
5423                                    &thermal_temp_input16_group);
5424                 break;
5425         case TPACPI_THERMAL_NONE:
5426         default:
5427                 break;
5428         }
5429 }
5430
5431 static int thermal_read(char *p)
5432 {
5433         int len = 0;
5434         int n, i;
5435         struct ibm_thermal_sensors_struct t;
5436
5437         n = thermal_get_sensors(&t);
5438         if (unlikely(n < 0))
5439                 return n;
5440
5441         len += sprintf(p + len, "temperatures:\t");
5442
5443         if (n > 0) {
5444                 for (i = 0; i < (n - 1); i++)
5445                         len += sprintf(p + len, "%d ", t.temp[i] / 1000);
5446                 len += sprintf(p + len, "%d\n", t.temp[i] / 1000);
5447         } else
5448                 len += sprintf(p + len, "not supported\n");
5449
5450         return len;
5451 }
5452
5453 static struct ibm_struct thermal_driver_data = {
5454         .name = "thermal",
5455         .read = thermal_read,
5456         .exit = thermal_exit,
5457 };
5458
5459 /*************************************************************************
5460  * EC Dump subdriver
5461  */
5462
5463 static u8 ecdump_regs[256];
5464
5465 static int ecdump_read(char *p)
5466 {
5467         int len = 0;
5468         int i, j;
5469         u8 v;
5470
5471         len += sprintf(p + len, "EC      "
5472                        " +00 +01 +02 +03 +04 +05 +06 +07"
5473                        " +08 +09 +0a +0b +0c +0d +0e +0f\n");
5474         for (i = 0; i < 256; i += 16) {
5475                 len += sprintf(p + len, "EC 0x%02x:", i);
5476                 for (j = 0; j < 16; j++) {
5477                         if (!acpi_ec_read(i + j, &v))
5478                                 break;
5479                         if (v != ecdump_regs[i + j])
5480                                 len += sprintf(p + len, " *%02x", v);
5481                         else
5482                                 len += sprintf(p + len, "  %02x", v);
5483                         ecdump_regs[i + j] = v;
5484                 }
5485                 len += sprintf(p + len, "\n");
5486                 if (j != 16)
5487                         break;
5488         }
5489
5490         /* These are way too dangerous to advertise openly... */
5491 #if 0
5492         len += sprintf(p + len, "commands:\t0x<offset> 0x<value>"
5493                        " (<offset> is 00-ff, <value> is 00-ff)\n");
5494         len += sprintf(p + len, "commands:\t0x<offset> <value>  "
5495                        " (<offset> is 00-ff, <value> is 0-255)\n");
5496 #endif
5497         return len;
5498 }
5499
5500 static int ecdump_write(char *buf)
5501 {
5502         char *cmd;
5503         int i, v;
5504
5505         while ((cmd = next_cmd(&buf))) {
5506                 if (sscanf(cmd, "0x%x 0x%x", &i, &v) == 2) {
5507                         /* i and v set */
5508                 } else if (sscanf(cmd, "0x%x %u", &i, &v) == 2) {
5509                         /* i and v set */
5510                 } else
5511                         return -EINVAL;
5512                 if (i >= 0 && i < 256 && v >= 0 && v < 256) {
5513                         if (!acpi_ec_write(i, v))
5514                                 return -EIO;
5515                 } else
5516                         return -EINVAL;
5517         }
5518
5519         return 0;
5520 }
5521
5522 static struct ibm_struct ecdump_driver_data = {
5523         .name = "ecdump",
5524         .read = ecdump_read,
5525         .write = ecdump_write,
5526         .flags.experimental = 1,
5527 };
5528
5529 /*************************************************************************
5530  * Backlight/brightness subdriver
5531  */
5532
5533 #define TPACPI_BACKLIGHT_DEV_NAME "thinkpad_screen"
5534
5535 /*
5536  * ThinkPads can read brightness from two places: EC HBRV (0x31), or
5537  * CMOS NVRAM byte 0x5E, bits 0-3.
5538  *
5539  * EC HBRV (0x31) has the following layout
5540  *   Bit 7: unknown function
5541  *   Bit 6: unknown function
5542  *   Bit 5: Z: honour scale changes, NZ: ignore scale changes
5543  *   Bit 4: must be set to zero to avoid problems
5544  *   Bit 3-0: backlight brightness level
5545  *
5546  * brightness_get_raw returns status data in the HBRV layout
5547  */
5548
5549 enum {
5550         TP_EC_BACKLIGHT = 0x31,
5551
5552         /* TP_EC_BACKLIGHT bitmasks */
5553         TP_EC_BACKLIGHT_LVLMSK = 0x1F,
5554         TP_EC_BACKLIGHT_CMDMSK = 0xE0,
5555         TP_EC_BACKLIGHT_MAPSW = 0x20,
5556 };
5557
5558 enum tpacpi_brightness_access_mode {
5559         TPACPI_BRGHT_MODE_AUTO = 0,     /* Not implemented yet */
5560         TPACPI_BRGHT_MODE_EC,           /* EC control */
5561         TPACPI_BRGHT_MODE_UCMS_STEP,    /* UCMS step-based control */
5562         TPACPI_BRGHT_MODE_ECNVRAM,      /* EC control w/ NVRAM store */
5563         TPACPI_BRGHT_MODE_MAX
5564 };
5565
5566 static struct backlight_device *ibm_backlight_device;
5567
5568 static enum tpacpi_brightness_access_mode brightness_mode =
5569                 TPACPI_BRGHT_MODE_MAX;
5570
5571 static unsigned int brightness_enable = 2; /* 2 = auto, 0 = no, 1 = yes */
5572
5573 static struct mutex brightness_mutex;
5574
5575 /* NVRAM brightness access,
5576  * call with brightness_mutex held! */
5577 static unsigned int tpacpi_brightness_nvram_get(void)
5578 {
5579         u8 lnvram;
5580
5581         lnvram = (nvram_read_byte(TP_NVRAM_ADDR_BRIGHTNESS)
5582                   & TP_NVRAM_MASK_LEVEL_BRIGHTNESS)
5583                   >> TP_NVRAM_POS_LEVEL_BRIGHTNESS;
5584         lnvram &= (tp_features.bright_16levels) ? 0x0f : 0x07;
5585
5586         return lnvram;
5587 }
5588
5589 static void tpacpi_brightness_checkpoint_nvram(void)
5590 {
5591         u8 lec = 0;
5592         u8 b_nvram;
5593
5594         if (brightness_mode != TPACPI_BRGHT_MODE_ECNVRAM)
5595                 return;
5596
5597         vdbg_printk(TPACPI_DBG_BRGHT,
5598                 "trying to checkpoint backlight level to NVRAM...\n");
5599
5600         if (mutex_lock_killable(&brightness_mutex) < 0)
5601                 return;
5602
5603         if (unlikely(!acpi_ec_read(TP_EC_BACKLIGHT, &lec)))
5604                 goto unlock;
5605         lec &= TP_EC_BACKLIGHT_LVLMSK;
5606         b_nvram = nvram_read_byte(TP_NVRAM_ADDR_BRIGHTNESS);
5607
5608         if (lec != ((b_nvram & TP_NVRAM_MASK_LEVEL_BRIGHTNESS)
5609                              >> TP_NVRAM_POS_LEVEL_BRIGHTNESS)) {
5610                 /* NVRAM needs update */
5611                 b_nvram &= ~(TP_NVRAM_MASK_LEVEL_BRIGHTNESS <<
5612                                 TP_NVRAM_POS_LEVEL_BRIGHTNESS);
5613                 b_nvram |= lec;
5614                 nvram_write_byte(b_nvram, TP_NVRAM_ADDR_BRIGHTNESS);
5615                 dbg_printk(TPACPI_DBG_BRGHT,
5616                            "updated NVRAM backlight level to %u (0x%02x)\n",
5617                            (unsigned int) lec, (unsigned int) b_nvram);
5618         } else
5619                 vdbg_printk(TPACPI_DBG_BRGHT,
5620                            "NVRAM backlight level already is %u (0x%02x)\n",
5621                            (unsigned int) lec, (unsigned int) b_nvram);
5622
5623 unlock:
5624         mutex_unlock(&brightness_mutex);
5625 }
5626
5627
5628 /* call with brightness_mutex held! */
5629 static int tpacpi_brightness_get_raw(int *status)
5630 {
5631         u8 lec = 0;
5632
5633         switch (brightness_mode) {
5634         case TPACPI_BRGHT_MODE_UCMS_STEP:
5635                 *status = tpacpi_brightness_nvram_get();
5636                 return 0;
5637         case TPACPI_BRGHT_MODE_EC:
5638         case TPACPI_BRGHT_MODE_ECNVRAM:
5639                 if (unlikely(!acpi_ec_read(TP_EC_BACKLIGHT, &lec)))
5640                         return -EIO;
5641                 *status = lec;
5642                 return 0;
5643         default:
5644                 return -ENXIO;
5645         }
5646 }
5647
5648 /* call with brightness_mutex held! */
5649 /* do NOT call with illegal backlight level value */
5650 static int tpacpi_brightness_set_ec(unsigned int value)
5651 {
5652         u8 lec = 0;
5653
5654         if (unlikely(!acpi_ec_read(TP_EC_BACKLIGHT, &lec)))
5655                 return -EIO;
5656
5657         if (unlikely(!acpi_ec_write(TP_EC_BACKLIGHT,
5658                                 (lec & TP_EC_BACKLIGHT_CMDMSK) |
5659                                 (value & TP_EC_BACKLIGHT_LVLMSK))))
5660                 return -EIO;
5661
5662         return 0;
5663 }
5664
5665 /* call with brightness_mutex held! */
5666 static int tpacpi_brightness_set_ucmsstep(unsigned int value)
5667 {
5668         int cmos_cmd, inc;
5669         unsigned int current_value, i;
5670
5671         current_value = tpacpi_brightness_nvram_get();
5672
5673         if (value == current_value)
5674                 return 0;
5675
5676         cmos_cmd = (value > current_value) ?
5677                         TP_CMOS_BRIGHTNESS_UP :
5678                         TP_CMOS_BRIGHTNESS_DOWN;
5679         inc = (value > current_value) ? 1 : -1;
5680
5681         for (i = current_value; i != value; i += inc)
5682                 if (issue_thinkpad_cmos_command(cmos_cmd))
5683                         return -EIO;
5684
5685         return 0;
5686 }
5687
5688 /* May return EINTR which can always be mapped to ERESTARTSYS */
5689 static int brightness_set(unsigned int value)
5690 {
5691         int res;
5692
5693         if (value > ((tp_features.bright_16levels)? 15 : 7) ||
5694             value < 0)
5695                 return -EINVAL;
5696
5697         vdbg_printk(TPACPI_DBG_BRGHT,
5698                         "set backlight level to %d\n", value);
5699
5700         res = mutex_lock_killable(&brightness_mutex);
5701         if (res < 0)
5702                 return res;
5703
5704         switch (brightness_mode) {
5705         case TPACPI_BRGHT_MODE_EC:
5706         case TPACPI_BRGHT_MODE_ECNVRAM:
5707                 res = tpacpi_brightness_set_ec(value);
5708                 break;
5709         case TPACPI_BRGHT_MODE_UCMS_STEP:
5710                 res = tpacpi_brightness_set_ucmsstep(value);
5711                 break;
5712         default:
5713                 res = -ENXIO;
5714         }
5715
5716         mutex_unlock(&brightness_mutex);
5717         return res;
5718 }
5719
5720 /* sysfs backlight class ----------------------------------------------- */
5721
5722 static int brightness_update_status(struct backlight_device *bd)
5723 {
5724         unsigned int level =
5725                 (bd->props.fb_blank == FB_BLANK_UNBLANK &&
5726                  bd->props.power == FB_BLANK_UNBLANK) ?
5727                                 bd->props.brightness : 0;
5728
5729         dbg_printk(TPACPI_DBG_BRGHT,
5730                         "backlight: attempt to set level to %d\n",
5731                         level);
5732
5733         /* it is the backlight class's job (caller) to handle
5734          * EINTR and other errors properly */
5735         return brightness_set(level);
5736 }
5737
5738 static int brightness_get(struct backlight_device *bd)
5739 {
5740         int status, res;
5741
5742         res = mutex_lock_killable(&brightness_mutex);
5743         if (res < 0)
5744                 return 0;
5745
5746         res = tpacpi_brightness_get_raw(&status);
5747
5748         mutex_unlock(&brightness_mutex);
5749
5750         if (res < 0)
5751                 return 0;
5752
5753         return status & TP_EC_BACKLIGHT_LVLMSK;
5754 }
5755
5756 static struct backlight_ops ibm_backlight_data = {
5757         .get_brightness = brightness_get,
5758         .update_status  = brightness_update_status,
5759 };
5760
5761 /* --------------------------------------------------------------------- */
5762
5763 static int __init brightness_init(struct ibm_init_struct *iibm)
5764 {
5765         int b;
5766
5767         vdbg_printk(TPACPI_DBG_INIT, "initializing brightness subdriver\n");
5768
5769         mutex_init(&brightness_mutex);
5770
5771         /*
5772          * We always attempt to detect acpi support, so as to switch
5773          * Lenovo Vista BIOS to ACPI brightness mode even if we are not
5774          * going to publish a backlight interface
5775          */
5776         b = tpacpi_check_std_acpi_brightness_support();
5777         if (b > 0) {
5778
5779                 if (acpi_video_backlight_support()) {
5780                         if (brightness_enable > 1) {
5781                                 printk(TPACPI_NOTICE
5782                                        "Standard ACPI backlight interface "
5783                                        "available, not loading native one.\n");
5784                                 return 1;
5785                         } else if (brightness_enable == 1) {
5786                                 printk(TPACPI_NOTICE
5787                                        "Backlight control force enabled, even if standard "
5788                                        "ACPI backlight interface is available\n");
5789                         }
5790                 } else {
5791                         if (brightness_enable > 1) {
5792                                 printk(TPACPI_NOTICE
5793                                        "Standard ACPI backlight interface not "
5794                                        "available, thinkpad_acpi native "
5795                                        "brightness control enabled\n");
5796                         }
5797                 }
5798         }
5799
5800         if (!brightness_enable) {
5801                 dbg_printk(TPACPI_DBG_INIT | TPACPI_DBG_BRGHT,
5802                            "brightness support disabled by "
5803                            "module parameter\n");
5804                 return 1;
5805         }
5806
5807         if (b > 16) {
5808                 printk(TPACPI_ERR
5809                        "Unsupported brightness interface, "
5810                        "please contact %s\n", TPACPI_MAIL);
5811                 return 1;
5812         }
5813         if (b == 16)
5814                 tp_features.bright_16levels = 1;
5815
5816         /*
5817          * Check for module parameter bogosity, note that we
5818          * init brightness_mode to TPACPI_BRGHT_MODE_MAX in order to be
5819          * able to detect "unspecified"
5820          */
5821         if (brightness_mode > TPACPI_BRGHT_MODE_MAX)
5822                 return -EINVAL;
5823
5824         /* TPACPI_BRGHT_MODE_AUTO not implemented yet, just use default */
5825         if (brightness_mode == TPACPI_BRGHT_MODE_AUTO ||
5826             brightness_mode == TPACPI_BRGHT_MODE_MAX) {
5827                 if (thinkpad_id.vendor == PCI_VENDOR_ID_IBM) {
5828                         /*
5829                          * IBM models that define HBRV probably have
5830                          * EC-based backlight level control
5831                          */
5832                         if (acpi_evalf(ec_handle, NULL, "HBRV", "qd"))
5833                                 /* T40-T43, R50-R52, R50e, R51e, X31-X41 */
5834                                 brightness_mode = TPACPI_BRGHT_MODE_ECNVRAM;
5835                         else
5836                                 /* all other IBM ThinkPads */
5837                                 brightness_mode = TPACPI_BRGHT_MODE_UCMS_STEP;
5838                 } else
5839                         /* All Lenovo ThinkPads */
5840                         brightness_mode = TPACPI_BRGHT_MODE_UCMS_STEP;
5841
5842                 dbg_printk(TPACPI_DBG_BRGHT,
5843                            "selected brightness_mode=%d\n",
5844                            brightness_mode);
5845         }
5846
5847         if (tpacpi_brightness_get_raw(&b) < 0)
5848                 return 1;
5849
5850         if (tp_features.bright_16levels)
5851                 printk(TPACPI_INFO
5852                        "detected a 16-level brightness capable ThinkPad\n");
5853
5854         ibm_backlight_device = backlight_device_register(
5855                                         TPACPI_BACKLIGHT_DEV_NAME, NULL, NULL,
5856                                         &ibm_backlight_data);
5857         if (IS_ERR(ibm_backlight_device)) {
5858                 printk(TPACPI_ERR "Could not register backlight device\n");
5859                 return PTR_ERR(ibm_backlight_device);
5860         }
5861         vdbg_printk(TPACPI_DBG_INIT | TPACPI_DBG_BRGHT,
5862                         "brightness is supported\n");
5863
5864         ibm_backlight_device->props.max_brightness =
5865                                 (tp_features.bright_16levels)? 15 : 7;
5866         ibm_backlight_device->props.brightness = b & TP_EC_BACKLIGHT_LVLMSK;
5867         backlight_update_status(ibm_backlight_device);
5868
5869         return 0;
5870 }
5871
5872 static void brightness_suspend(pm_message_t state)
5873 {
5874         tpacpi_brightness_checkpoint_nvram();
5875 }
5876
5877 static void brightness_shutdown(void)
5878 {
5879         tpacpi_brightness_checkpoint_nvram();
5880 }
5881
5882 static void brightness_exit(void)
5883 {
5884         if (ibm_backlight_device) {
5885                 vdbg_printk(TPACPI_DBG_EXIT | TPACPI_DBG_BRGHT,
5886                             "calling backlight_device_unregister()\n");
5887                 backlight_device_unregister(ibm_backlight_device);
5888         }
5889
5890         tpacpi_brightness_checkpoint_nvram();
5891 }
5892
5893 static int brightness_read(char *p)
5894 {
5895         int len = 0;
5896         int level;
5897
5898         level = brightness_get(NULL);
5899         if (level < 0) {
5900                 len += sprintf(p + len, "level:\t\tunreadable\n");
5901         } else {
5902                 len += sprintf(p + len, "level:\t\t%d\n", level);
5903                 len += sprintf(p + len, "commands:\tup, down\n");
5904                 len += sprintf(p + len, "commands:\tlevel <level>"
5905                                " (<level> is 0-%d)\n",
5906                                (tp_features.bright_16levels) ? 15 : 7);
5907         }
5908
5909         return len;
5910 }
5911
5912 static int brightness_write(char *buf)
5913 {
5914         int level;
5915         int rc;
5916         char *cmd;
5917         int max_level = (tp_features.bright_16levels) ? 15 : 7;
5918
5919         level = brightness_get(NULL);
5920         if (level < 0)
5921                 return level;
5922
5923         while ((cmd = next_cmd(&buf))) {
5924                 if (strlencmp(cmd, "up") == 0) {
5925                         if (level < max_level)
5926                                 level++;
5927                 } else if (strlencmp(cmd, "down") == 0) {
5928                         if (level > 0)
5929                                 level--;
5930                 } else if (sscanf(cmd, "level %d", &level) == 1 &&
5931                            level >= 0 && level <= max_level) {
5932                         /* new level set */
5933                 } else
5934                         return -EINVAL;
5935         }
5936
5937         tpacpi_disclose_usertask("procfs brightness",
5938                         "set level to %d\n", level);
5939
5940         /*
5941          * Now we know what the final level should be, so we try to set it.
5942          * Doing it this way makes the syscall restartable in case of EINTR
5943          */
5944         rc = brightness_set(level);
5945         return (rc == -EINTR)? ERESTARTSYS : rc;
5946 }
5947
5948 static struct ibm_struct brightness_driver_data = {
5949         .name = "brightness",
5950         .read = brightness_read,
5951         .write = brightness_write,
5952         .exit = brightness_exit,
5953         .suspend = brightness_suspend,
5954         .shutdown = brightness_shutdown,
5955 };
5956
5957 /*************************************************************************
5958  * Volume subdriver
5959  */
5960
5961 static int volume_offset = 0x30;
5962
5963 static int volume_read(char *p)
5964 {
5965         int len = 0;
5966         u8 level;
5967
5968         if (!acpi_ec_read(volume_offset, &level)) {
5969                 len += sprintf(p + len, "level:\t\tunreadable\n");
5970         } else {
5971                 len += sprintf(p + len, "level:\t\t%d\n", level & 0xf);
5972                 len += sprintf(p + len, "mute:\t\t%s\n", onoff(level, 6));
5973                 len += sprintf(p + len, "commands:\tup, down, mute\n");
5974                 len += sprintf(p + len, "commands:\tlevel <level>"
5975                                " (<level> is 0-15)\n");
5976         }
5977
5978         return len;
5979 }
5980
5981 static int volume_write(char *buf)
5982 {
5983         int cmos_cmd, inc, i;
5984         u8 level, mute;
5985         int new_level, new_mute;
5986         char *cmd;
5987
5988         while ((cmd = next_cmd(&buf))) {
5989                 if (!acpi_ec_read(volume_offset, &level))
5990                         return -EIO;
5991                 new_mute = mute = level & 0x40;
5992                 new_level = level = level & 0xf;
5993
5994                 if (strlencmp(cmd, "up") == 0) {
5995                         if (mute)
5996                                 new_mute = 0;
5997                         else
5998                                 new_level = level == 15 ? 15 : level + 1;
5999                 } else if (strlencmp(cmd, "down") == 0) {
6000                         if (mute)
6001                                 new_mute = 0;
6002                         else
6003                                 new_level = level == 0 ? 0 : level - 1;
6004                 } else if (sscanf(cmd, "level %d", &new_level) == 1 &&
6005                            new_level >= 0 && new_level <= 15) {
6006                         /* new_level set */
6007                 } else if (strlencmp(cmd, "mute") == 0) {
6008                         new_mute = 0x40;
6009                 } else
6010                         return -EINVAL;
6011
6012                 if (new_level != level) {
6013                         /* mute doesn't change */
6014
6015                         cmos_cmd = (new_level > level) ?
6016                                         TP_CMOS_VOLUME_UP : TP_CMOS_VOLUME_DOWN;
6017                         inc = new_level > level ? 1 : -1;
6018
6019                         if (mute && (issue_thinkpad_cmos_command(cmos_cmd) ||
6020                                      !acpi_ec_write(volume_offset, level)))
6021                                 return -EIO;
6022
6023                         for (i = level; i != new_level; i += inc)
6024                                 if (issue_thinkpad_cmos_command(cmos_cmd) ||
6025                                     !acpi_ec_write(volume_offset, i + inc))
6026                                         return -EIO;
6027
6028                         if (mute &&
6029                             (issue_thinkpad_cmos_command(TP_CMOS_VOLUME_MUTE) ||
6030                              !acpi_ec_write(volume_offset, new_level + mute))) {
6031                                 return -EIO;
6032                         }
6033                 }
6034
6035                 if (new_mute != mute) {
6036                         /* level doesn't change */
6037
6038                         cmos_cmd = (new_mute) ?
6039                                    TP_CMOS_VOLUME_MUTE : TP_CMOS_VOLUME_UP;
6040
6041                         if (issue_thinkpad_cmos_command(cmos_cmd) ||
6042                             !acpi_ec_write(volume_offset, level + new_mute))
6043                                 return -EIO;
6044                 }
6045         }
6046
6047         return 0;
6048 }
6049
6050 static struct ibm_struct volume_driver_data = {
6051         .name = "volume",
6052         .read = volume_read,
6053         .write = volume_write,
6054 };
6055
6056 /*************************************************************************
6057  * Fan subdriver
6058  */
6059
6060 /*
6061  * FAN ACCESS MODES
6062  *
6063  * TPACPI_FAN_RD_ACPI_GFAN:
6064  *      ACPI GFAN method: returns fan level
6065  *
6066  *      see TPACPI_FAN_WR_ACPI_SFAN
6067  *      EC 0x2f (HFSP) not available if GFAN exists
6068  *
6069  * TPACPI_FAN_WR_ACPI_SFAN:
6070  *      ACPI SFAN method: sets fan level, 0 (stop) to 7 (max)
6071  *
6072  *      EC 0x2f (HFSP) might be available *for reading*, but do not use
6073  *      it for writing.
6074  *
6075  * TPACPI_FAN_WR_TPEC:
6076  *      ThinkPad EC register 0x2f (HFSP): fan control loop mode
6077  *      Supported on almost all ThinkPads
6078  *
6079  *      Fan speed changes of any sort (including those caused by the
6080  *      disengaged mode) are usually done slowly by the firmware as the
6081  *      maximum ammount of fan duty cycle change per second seems to be
6082  *      limited.
6083  *
6084  *      Reading is not available if GFAN exists.
6085  *      Writing is not available if SFAN exists.
6086  *
6087  *      Bits
6088  *       7      automatic mode engaged;
6089  *              (default operation mode of the ThinkPad)
6090  *              fan level is ignored in this mode.
6091  *       6      full speed mode (takes precedence over bit 7);
6092  *              not available on all thinkpads.  May disable
6093  *              the tachometer while the fan controller ramps up
6094  *              the speed (which can take up to a few *minutes*).
6095  *              Speeds up fan to 100% duty-cycle, which is far above
6096  *              the standard RPM levels.  It is not impossible that
6097  *              it could cause hardware damage.
6098  *      5-3     unused in some models.  Extra bits for fan level
6099  *              in others, but still useless as all values above
6100  *              7 map to the same speed as level 7 in these models.
6101  *      2-0     fan level (0..7 usually)
6102  *                      0x00 = stop
6103  *                      0x07 = max (set when temperatures critical)
6104  *              Some ThinkPads may have other levels, see
6105  *              TPACPI_FAN_WR_ACPI_FANS (X31/X40/X41)
6106  *
6107  *      FIRMWARE BUG: on some models, EC 0x2f might not be initialized at
6108  *      boot. Apparently the EC does not intialize it, so unless ACPI DSDT
6109  *      does so, its initial value is meaningless (0x07).
6110  *
6111  *      For firmware bugs, refer to:
6112  *      http://thinkwiki.org/wiki/Embedded_Controller_Firmware#Firmware_Issues
6113  *
6114  *      ----
6115  *
6116  *      ThinkPad EC register 0x84 (LSB), 0x85 (MSB):
6117  *      Main fan tachometer reading (in RPM)
6118  *
6119  *      This register is present on all ThinkPads with a new-style EC, and
6120  *      it is known not to be present on the A21m/e, and T22, as there is
6121  *      something else in offset 0x84 according to the ACPI DSDT.  Other
6122  *      ThinkPads from this same time period (and earlier) probably lack the
6123  *      tachometer as well.
6124  *
6125  *      Unfortunately a lot of ThinkPads with new-style ECs but whose firmware
6126  *      was never fixed by IBM to report the EC firmware version string
6127  *      probably support the tachometer (like the early X models), so
6128  *      detecting it is quite hard.  We need more data to know for sure.
6129  *
6130  *      FIRMWARE BUG: always read 0x84 first, otherwise incorrect readings
6131  *      might result.
6132  *
6133  *      FIRMWARE BUG: may go stale while the EC is switching to full speed
6134  *      mode.
6135  *
6136  *      For firmware bugs, refer to:
6137  *      http://thinkwiki.org/wiki/Embedded_Controller_Firmware#Firmware_Issues
6138  *
6139  * TPACPI_FAN_WR_ACPI_FANS:
6140  *      ThinkPad X31, X40, X41.  Not available in the X60.
6141  *
6142  *      FANS ACPI handle: takes three arguments: low speed, medium speed,
6143  *      high speed.  ACPI DSDT seems to map these three speeds to levels
6144  *      as follows: STOP LOW LOW MED MED HIGH HIGH HIGH HIGH
6145  *      (this map is stored on FAN0..FAN8 as "0,1,1,2,2,3,3,3,3")
6146  *
6147  *      The speeds are stored on handles
6148  *      (FANA:FAN9), (FANC:FANB), (FANE:FAND).
6149  *
6150  *      There are three default speed sets, acessible as handles:
6151  *      FS1L,FS1M,FS1H; FS2L,FS2M,FS2H; FS3L,FS3M,FS3H
6152  *
6153  *      ACPI DSDT switches which set is in use depending on various
6154  *      factors.
6155  *
6156  *      TPACPI_FAN_WR_TPEC is also available and should be used to
6157  *      command the fan.  The X31/X40/X41 seems to have 8 fan levels,
6158  *      but the ACPI tables just mention level 7.
6159  */
6160
6161 enum {                                  /* Fan control constants */
6162         fan_status_offset = 0x2f,       /* EC register 0x2f */
6163         fan_rpm_offset = 0x84,          /* EC register 0x84: LSB, 0x85 MSB (RPM)
6164                                          * 0x84 must be read before 0x85 */
6165
6166         TP_EC_FAN_FULLSPEED = 0x40,     /* EC fan mode: full speed */
6167         TP_EC_FAN_AUTO      = 0x80,     /* EC fan mode: auto fan control */
6168
6169         TPACPI_FAN_LAST_LEVEL = 0x100,  /* Use cached last-seen fan level */
6170 };
6171
6172 enum fan_status_access_mode {
6173         TPACPI_FAN_NONE = 0,            /* No fan status or control */
6174         TPACPI_FAN_RD_ACPI_GFAN,        /* Use ACPI GFAN */
6175         TPACPI_FAN_RD_TPEC,             /* Use ACPI EC regs 0x2f, 0x84-0x85 */
6176 };
6177
6178 enum fan_control_access_mode {
6179         TPACPI_FAN_WR_NONE = 0,         /* No fan control */
6180         TPACPI_FAN_WR_ACPI_SFAN,        /* Use ACPI SFAN */
6181         TPACPI_FAN_WR_TPEC,             /* Use ACPI EC reg 0x2f */
6182         TPACPI_FAN_WR_ACPI_FANS,        /* Use ACPI FANS and EC reg 0x2f */
6183 };
6184
6185 enum fan_control_commands {
6186         TPACPI_FAN_CMD_SPEED    = 0x0001,       /* speed command */
6187         TPACPI_FAN_CMD_LEVEL    = 0x0002,       /* level command  */
6188         TPACPI_FAN_CMD_ENABLE   = 0x0004,       /* enable/disable cmd,
6189                                                  * and also watchdog cmd */
6190 };
6191
6192 static int fan_control_allowed;
6193
6194 static enum fan_status_access_mode fan_status_access_mode;
6195 static enum fan_control_access_mode fan_control_access_mode;
6196 static enum fan_control_commands fan_control_commands;
6197
6198 static u8 fan_control_initial_status;
6199 static u8 fan_control_desired_level;
6200 static u8 fan_control_resume_level;
6201 static int fan_watchdog_maxinterval;
6202
6203 static struct mutex fan_mutex;
6204
6205 static void fan_watchdog_fire(struct work_struct *ignored);
6206 static DECLARE_DELAYED_WORK(fan_watchdog_task, fan_watchdog_fire);
6207
6208 TPACPI_HANDLE(fans, ec, "FANS");        /* X31, X40, X41 */
6209 TPACPI_HANDLE(gfan, ec, "GFAN", /* 570 */
6210            "\\FSPD",            /* 600e/x, 770e, 770x */
6211            );                   /* all others */
6212 TPACPI_HANDLE(sfan, ec, "SFAN", /* 570 */
6213            "JFNS",              /* 770x-JL */
6214            );                   /* all others */
6215
6216 /*
6217  * Unitialized HFSP quirk: ACPI DSDT and EC fail to initialize the
6218  * HFSP register at boot, so it contains 0x07 but the Thinkpad could
6219  * be in auto mode (0x80).
6220  *
6221  * This is corrected by any write to HFSP either by the driver, or
6222  * by the firmware.
6223  *
6224  * We assume 0x07 really means auto mode while this quirk is active,
6225  * as this is far more likely than the ThinkPad being in level 7,
6226  * which is only used by the firmware during thermal emergencies.
6227  */
6228
6229 static void fan_quirk1_detect(void)
6230 {
6231         /* In some ThinkPads, neither the EC nor the ACPI
6232          * DSDT initialize the HFSP register, and it ends up
6233          * being initially set to 0x07 when it *could* be
6234          * either 0x07 or 0x80.
6235          *
6236          * Enable for TP-1Y (T43), TP-78 (R51e),
6237          * TP-76 (R52), TP-70 (T43, R52), which are known
6238          * to be buggy. */
6239         if (fan_control_initial_status == 0x07) {
6240                 switch (thinkpad_id.ec_model) {
6241                 case 0x5931: /* TP-1Y */
6242                 case 0x3837: /* TP-78 */
6243                 case 0x3637: /* TP-76 */
6244                 case 0x3037: /* TP-70 */
6245                         printk(TPACPI_NOTICE
6246                                "fan_init: initial fan status is unknown, "
6247                                "assuming it is in auto mode\n");
6248                         tp_features.fan_ctrl_status_undef = 1;
6249                         ;;
6250                 }
6251         }
6252 }
6253
6254 static void fan_quirk1_handle(u8 *fan_status)
6255 {
6256         if (unlikely(tp_features.fan_ctrl_status_undef)) {
6257                 if (*fan_status != fan_control_initial_status) {
6258                         /* something changed the HFSP regisnter since
6259                          * driver init time, so it is not undefined
6260                          * anymore */
6261                         tp_features.fan_ctrl_status_undef = 0;
6262                 } else {
6263                         /* Return most likely status. In fact, it
6264                          * might be the only possible status */
6265                         *fan_status = TP_EC_FAN_AUTO;
6266                 }
6267         }
6268 }
6269
6270 /*
6271  * Call with fan_mutex held
6272  */
6273 static void fan_update_desired_level(u8 status)
6274 {
6275         if ((status &
6276              (TP_EC_FAN_AUTO | TP_EC_FAN_FULLSPEED)) == 0) {
6277                 if (status > 7)
6278                         fan_control_desired_level = 7;
6279                 else
6280                         fan_control_desired_level = status;
6281         }
6282 }
6283
6284 static int fan_get_status(u8 *status)
6285 {
6286         u8 s;
6287
6288         /* TODO:
6289          * Add TPACPI_FAN_RD_ACPI_FANS ? */
6290
6291         switch (fan_status_access_mode) {
6292         case TPACPI_FAN_RD_ACPI_GFAN:
6293                 /* 570, 600e/x, 770e, 770x */
6294
6295                 if (unlikely(!acpi_evalf(gfan_handle, &s, NULL, "d")))
6296                         return -EIO;
6297
6298                 if (likely(status))
6299                         *status = s & 0x07;
6300
6301                 break;
6302
6303         case TPACPI_FAN_RD_TPEC:
6304                 /* all except 570, 600e/x, 770e, 770x */
6305                 if (unlikely(!acpi_ec_read(fan_status_offset, &s)))
6306                         return -EIO;
6307
6308                 if (likely(status)) {
6309                         *status = s;
6310                         fan_quirk1_handle(status);
6311                 }
6312
6313                 break;
6314
6315         default:
6316                 return -ENXIO;
6317         }
6318
6319         return 0;
6320 }
6321
6322 static int fan_get_status_safe(u8 *status)
6323 {
6324         int rc;
6325         u8 s;
6326
6327         if (mutex_lock_killable(&fan_mutex))
6328                 return -ERESTARTSYS;
6329         rc = fan_get_status(&s);
6330         if (!rc)
6331                 fan_update_desired_level(s);
6332         mutex_unlock(&fan_mutex);
6333
6334         if (status)
6335                 *status = s;
6336
6337         return rc;
6338 }
6339
6340 static int fan_get_speed(unsigned int *speed)
6341 {
6342         u8 hi, lo;
6343
6344         switch (fan_status_access_mode) {
6345         case TPACPI_FAN_RD_TPEC:
6346                 /* all except 570, 600e/x, 770e, 770x */
6347                 if (unlikely(!acpi_ec_read(fan_rpm_offset, &lo) ||
6348                              !acpi_ec_read(fan_rpm_offset + 1, &hi)))
6349                         return -EIO;
6350
6351                 if (likely(speed))
6352                         *speed = (hi << 8) | lo;
6353
6354                 break;
6355
6356         default:
6357                 return -ENXIO;
6358         }
6359
6360         return 0;
6361 }
6362
6363 static int fan_set_level(int level)
6364 {
6365         if (!fan_control_allowed)
6366                 return -EPERM;
6367
6368         switch (fan_control_access_mode) {
6369         case TPACPI_FAN_WR_ACPI_SFAN:
6370                 if (level >= 0 && level <= 7) {
6371                         if (!acpi_evalf(sfan_handle, NULL, NULL, "vd", level))
6372                                 return -EIO;
6373                 } else
6374                         return -EINVAL;
6375                 break;
6376
6377         case TPACPI_FAN_WR_ACPI_FANS:
6378         case TPACPI_FAN_WR_TPEC:
6379                 if (!(level & TP_EC_FAN_AUTO) &&
6380                     !(level & TP_EC_FAN_FULLSPEED) &&
6381                     ((level < 0) || (level > 7)))
6382                         return -EINVAL;
6383
6384                 /* safety net should the EC not support AUTO
6385                  * or FULLSPEED mode bits and just ignore them */
6386                 if (level & TP_EC_FAN_FULLSPEED)
6387                         level |= 7;     /* safety min speed 7 */
6388                 else if (level & TP_EC_FAN_AUTO)
6389                         level |= 4;     /* safety min speed 4 */
6390
6391                 if (!acpi_ec_write(fan_status_offset, level))
6392                         return -EIO;
6393                 else
6394                         tp_features.fan_ctrl_status_undef = 0;
6395                 break;
6396
6397         default:
6398                 return -ENXIO;
6399         }
6400
6401         vdbg_printk(TPACPI_DBG_FAN,
6402                 "fan control: set fan control register to 0x%02x\n", level);
6403         return 0;
6404 }
6405
6406 static int fan_set_level_safe(int level)
6407 {
6408         int rc;
6409
6410         if (!fan_control_allowed)
6411                 return -EPERM;
6412
6413         if (mutex_lock_killable(&fan_mutex))
6414                 return -ERESTARTSYS;
6415
6416         if (level == TPACPI_FAN_LAST_LEVEL)
6417                 level = fan_control_desired_level;
6418
6419         rc = fan_set_level(level);
6420         if (!rc)
6421                 fan_update_desired_level(level);
6422
6423         mutex_unlock(&fan_mutex);
6424         return rc;
6425 }
6426
6427 static int fan_set_enable(void)
6428 {
6429         u8 s;
6430         int rc;
6431
6432         if (!fan_control_allowed)
6433                 return -EPERM;
6434
6435         if (mutex_lock_killable(&fan_mutex))
6436                 return -ERESTARTSYS;
6437
6438         switch (fan_control_access_mode) {
6439         case TPACPI_FAN_WR_ACPI_FANS:
6440         case TPACPI_FAN_WR_TPEC:
6441                 rc = fan_get_status(&s);
6442                 if (rc < 0)
6443                         break;
6444
6445                 /* Don't go out of emergency fan mode */
6446                 if (s != 7) {
6447                         s &= 0x07;
6448                         s |= TP_EC_FAN_AUTO | 4; /* min fan speed 4 */
6449                 }
6450
6451                 if (!acpi_ec_write(fan_status_offset, s))
6452                         rc = -EIO;
6453                 else {
6454                         tp_features.fan_ctrl_status_undef = 0;
6455                         rc = 0;
6456                 }
6457                 break;
6458
6459         case TPACPI_FAN_WR_ACPI_SFAN:
6460                 rc = fan_get_status(&s);
6461                 if (rc < 0)
6462                         break;
6463
6464                 s &= 0x07;
6465
6466                 /* Set fan to at least level 4 */
6467                 s |= 4;
6468
6469                 if (!acpi_evalf(sfan_handle, NULL, NULL, "vd", s))
6470                         rc = -EIO;
6471                 else
6472                         rc = 0;
6473                 break;
6474
6475         default:
6476                 rc = -ENXIO;
6477         }
6478
6479         mutex_unlock(&fan_mutex);
6480
6481         if (!rc)
6482                 vdbg_printk(TPACPI_DBG_FAN,
6483                         "fan control: set fan control register to 0x%02x\n",
6484                         s);
6485         return rc;
6486 }
6487
6488 static int fan_set_disable(void)
6489 {
6490         int rc;
6491
6492         if (!fan_control_allowed)
6493                 return -EPERM;
6494
6495         if (mutex_lock_killable(&fan_mutex))
6496                 return -ERESTARTSYS;
6497
6498         rc = 0;
6499         switch (fan_control_access_mode) {
6500         case TPACPI_FAN_WR_ACPI_FANS:
6501         case TPACPI_FAN_WR_TPEC:
6502                 if (!acpi_ec_write(fan_status_offset, 0x00))
6503                         rc = -EIO;
6504                 else {
6505                         fan_control_desired_level = 0;
6506                         tp_features.fan_ctrl_status_undef = 0;
6507                 }
6508                 break;
6509
6510         case TPACPI_FAN_WR_ACPI_SFAN:
6511                 if (!acpi_evalf(sfan_handle, NULL, NULL, "vd", 0x00))
6512                         rc = -EIO;
6513                 else
6514                         fan_control_desired_level = 0;
6515                 break;
6516
6517         default:
6518                 rc = -ENXIO;
6519         }
6520
6521         if (!rc)
6522                 vdbg_printk(TPACPI_DBG_FAN,
6523                         "fan control: set fan control register to 0\n");
6524
6525         mutex_unlock(&fan_mutex);
6526         return rc;
6527 }
6528
6529 static int fan_set_speed(int speed)
6530 {
6531         int rc;
6532
6533         if (!fan_control_allowed)
6534                 return -EPERM;
6535
6536         if (mutex_lock_killable(&fan_mutex))
6537                 return -ERESTARTSYS;
6538
6539         rc = 0;
6540         switch (fan_control_access_mode) {
6541         case TPACPI_FAN_WR_ACPI_FANS:
6542                 if (speed >= 0 && speed <= 65535) {
6543                         if (!acpi_evalf(fans_handle, NULL, NULL, "vddd",
6544                                         speed, speed, speed))
6545                                 rc = -EIO;
6546                 } else
6547                         rc = -EINVAL;
6548                 break;
6549
6550         default:
6551                 rc = -ENXIO;
6552         }
6553
6554         mutex_unlock(&fan_mutex);
6555         return rc;
6556 }
6557
6558 static void fan_watchdog_reset(void)
6559 {
6560         static int fan_watchdog_active;
6561
6562         if (fan_control_access_mode == TPACPI_FAN_WR_NONE)
6563                 return;
6564
6565         if (fan_watchdog_active)
6566                 cancel_delayed_work(&fan_watchdog_task);
6567
6568         if (fan_watchdog_maxinterval > 0 &&
6569             tpacpi_lifecycle != TPACPI_LIFE_EXITING) {
6570                 fan_watchdog_active = 1;
6571                 if (!queue_delayed_work(tpacpi_wq, &fan_watchdog_task,
6572                                 msecs_to_jiffies(fan_watchdog_maxinterval
6573                                                  * 1000))) {
6574                         printk(TPACPI_ERR
6575                                "failed to queue the fan watchdog, "
6576                                "watchdog will not trigger\n");
6577                 }
6578         } else
6579                 fan_watchdog_active = 0;
6580 }
6581
6582 static void fan_watchdog_fire(struct work_struct *ignored)
6583 {
6584         int rc;
6585
6586         if (tpacpi_lifecycle != TPACPI_LIFE_RUNNING)
6587                 return;
6588
6589         printk(TPACPI_NOTICE "fan watchdog: enabling fan\n");
6590         rc = fan_set_enable();
6591         if (rc < 0) {
6592                 printk(TPACPI_ERR "fan watchdog: error %d while enabling fan, "
6593                         "will try again later...\n", -rc);
6594                 /* reschedule for later */
6595                 fan_watchdog_reset();
6596         }
6597 }
6598
6599 /*
6600  * SYSFS fan layout: hwmon compatible (device)
6601  *
6602  * pwm*_enable:
6603  *      0: "disengaged" mode
6604  *      1: manual mode
6605  *      2: native EC "auto" mode (recommended, hardware default)
6606  *
6607  * pwm*: set speed in manual mode, ignored otherwise.
6608  *      0 is level 0; 255 is level 7. Intermediate points done with linear
6609  *      interpolation.
6610  *
6611  * fan*_input: tachometer reading, RPM
6612  *
6613  *
6614  * SYSFS fan layout: extensions
6615  *
6616  * fan_watchdog (driver):
6617  *      fan watchdog interval in seconds, 0 disables (default), max 120
6618  */
6619
6620 /* sysfs fan pwm1_enable ----------------------------------------------- */
6621 static ssize_t fan_pwm1_enable_show(struct device *dev,
6622                                     struct device_attribute *attr,
6623                                     char *buf)
6624 {
6625         int res, mode;
6626         u8 status;
6627
6628         res = fan_get_status_safe(&status);
6629         if (res)
6630                 return res;
6631
6632         if (status & TP_EC_FAN_FULLSPEED) {
6633                 mode = 0;
6634         } else if (status & TP_EC_FAN_AUTO) {
6635                 mode = 2;
6636         } else
6637                 mode = 1;
6638
6639         return snprintf(buf, PAGE_SIZE, "%d\n", mode);
6640 }
6641
6642 static ssize_t fan_pwm1_enable_store(struct device *dev,
6643                                      struct device_attribute *attr,
6644                                      const char *buf, size_t count)
6645 {
6646         unsigned long t;
6647         int res, level;
6648
6649         if (parse_strtoul(buf, 2, &t))
6650                 return -EINVAL;
6651
6652         tpacpi_disclose_usertask("hwmon pwm1_enable",
6653                         "set fan mode to %lu\n", t);
6654
6655         switch (t) {
6656         case 0:
6657                 level = TP_EC_FAN_FULLSPEED;
6658                 break;
6659         case 1:
6660                 level = TPACPI_FAN_LAST_LEVEL;
6661                 break;
6662         case 2:
6663                 level = TP_EC_FAN_AUTO;
6664                 break;
6665         case 3:
6666                 /* reserved for software-controlled auto mode */
6667                 return -ENOSYS;
6668         default:
6669                 return -EINVAL;
6670         }
6671
6672         res = fan_set_level_safe(level);
6673         if (res == -ENXIO)
6674                 return -EINVAL;
6675         else if (res < 0)
6676                 return res;
6677
6678         fan_watchdog_reset();
6679
6680         return count;
6681 }
6682
6683 static struct device_attribute dev_attr_fan_pwm1_enable =
6684         __ATTR(pwm1_enable, S_IWUSR | S_IRUGO,
6685                 fan_pwm1_enable_show, fan_pwm1_enable_store);
6686
6687 /* sysfs fan pwm1 ------------------------------------------------------ */
6688 static ssize_t fan_pwm1_show(struct device *dev,
6689                              struct device_attribute *attr,
6690                              char *buf)
6691 {
6692         int res;
6693         u8 status;
6694
6695         res = fan_get_status_safe(&status);
6696         if (res)
6697                 return res;
6698
6699         if ((status &
6700              (TP_EC_FAN_AUTO | TP_EC_FAN_FULLSPEED)) != 0)
6701                 status = fan_control_desired_level;
6702
6703         if (status > 7)
6704                 status = 7;
6705
6706         return snprintf(buf, PAGE_SIZE, "%u\n", (status * 255) / 7);
6707 }
6708
6709 static ssize_t fan_pwm1_store(struct device *dev,
6710                               struct device_attribute *attr,
6711                               const char *buf, size_t count)
6712 {
6713         unsigned long s;
6714         int rc;
6715         u8 status, newlevel;
6716
6717         if (parse_strtoul(buf, 255, &s))
6718                 return -EINVAL;
6719
6720         tpacpi_disclose_usertask("hwmon pwm1",
6721                         "set fan speed to %lu\n", s);
6722
6723         /* scale down from 0-255 to 0-7 */
6724         newlevel = (s >> 5) & 0x07;
6725
6726         if (mutex_lock_killable(&fan_mutex))
6727                 return -ERESTARTSYS;
6728
6729         rc = fan_get_status(&status);
6730         if (!rc && (status &
6731                     (TP_EC_FAN_AUTO | TP_EC_FAN_FULLSPEED)) == 0) {
6732                 rc = fan_set_level(newlevel);
6733                 if (rc == -ENXIO)
6734                         rc = -EINVAL;
6735                 else if (!rc) {
6736                         fan_update_desired_level(newlevel);
6737                         fan_watchdog_reset();
6738                 }
6739         }
6740
6741         mutex_unlock(&fan_mutex);
6742         return (rc)? rc : count;
6743 }
6744
6745 static struct device_attribute dev_attr_fan_pwm1 =
6746         __ATTR(pwm1, S_IWUSR | S_IRUGO,
6747                 fan_pwm1_show, fan_pwm1_store);
6748
6749 /* sysfs fan fan1_input ------------------------------------------------ */
6750 static ssize_t fan_fan1_input_show(struct device *dev,
6751                            struct device_attribute *attr,
6752                            char *buf)
6753 {
6754         int res;
6755         unsigned int speed;
6756
6757         res = fan_get_speed(&speed);
6758         if (res < 0)
6759                 return res;
6760
6761         return snprintf(buf, PAGE_SIZE, "%u\n", speed);
6762 }
6763
6764 static struct device_attribute dev_attr_fan_fan1_input =
6765         __ATTR(fan1_input, S_IRUGO,
6766                 fan_fan1_input_show, NULL);
6767
6768 /* sysfs fan fan_watchdog (hwmon driver) ------------------------------- */
6769 static ssize_t fan_fan_watchdog_show(struct device_driver *drv,
6770                                      char *buf)
6771 {
6772         return snprintf(buf, PAGE_SIZE, "%u\n", fan_watchdog_maxinterval);
6773 }
6774
6775 static ssize_t fan_fan_watchdog_store(struct device_driver *drv,
6776                                       const char *buf, size_t count)
6777 {
6778         unsigned long t;
6779
6780         if (parse_strtoul(buf, 120, &t))
6781                 return -EINVAL;
6782
6783         if (!fan_control_allowed)
6784                 return -EPERM;
6785
6786         fan_watchdog_maxinterval = t;
6787         fan_watchdog_reset();
6788
6789         tpacpi_disclose_usertask("fan_watchdog", "set to %lu\n", t);
6790
6791         return count;
6792 }
6793
6794 static DRIVER_ATTR(fan_watchdog, S_IWUSR | S_IRUGO,
6795                 fan_fan_watchdog_show, fan_fan_watchdog_store);
6796
6797 /* --------------------------------------------------------------------- */
6798 static struct attribute *fan_attributes[] = {
6799         &dev_attr_fan_pwm1_enable.attr, &dev_attr_fan_pwm1.attr,
6800         &dev_attr_fan_fan1_input.attr,
6801         NULL
6802 };
6803
6804 static const struct attribute_group fan_attr_group = {
6805         .attrs = fan_attributes,
6806 };
6807
6808 static int __init fan_init(struct ibm_init_struct *iibm)
6809 {
6810         int rc;
6811
6812         vdbg_printk(TPACPI_DBG_INIT | TPACPI_DBG_FAN,
6813                         "initializing fan subdriver\n");
6814
6815         mutex_init(&fan_mutex);
6816         fan_status_access_mode = TPACPI_FAN_NONE;
6817         fan_control_access_mode = TPACPI_FAN_WR_NONE;
6818         fan_control_commands = 0;
6819         fan_watchdog_maxinterval = 0;
6820         tp_features.fan_ctrl_status_undef = 0;
6821         fan_control_desired_level = 7;
6822
6823         TPACPI_ACPIHANDLE_INIT(fans);
6824         TPACPI_ACPIHANDLE_INIT(gfan);
6825         TPACPI_ACPIHANDLE_INIT(sfan);
6826
6827         if (gfan_handle) {
6828                 /* 570, 600e/x, 770e, 770x */
6829                 fan_status_access_mode = TPACPI_FAN_RD_ACPI_GFAN;
6830         } else {
6831                 /* all other ThinkPads: note that even old-style
6832                  * ThinkPad ECs supports the fan control register */
6833                 if (likely(acpi_ec_read(fan_status_offset,
6834                                         &fan_control_initial_status))) {
6835                         fan_status_access_mode = TPACPI_FAN_RD_TPEC;
6836                         fan_quirk1_detect();
6837                 } else {
6838                         printk(TPACPI_ERR
6839                                "ThinkPad ACPI EC access misbehaving, "
6840                                "fan status and control unavailable\n");
6841                         return 1;
6842                 }
6843         }
6844
6845         if (sfan_handle) {
6846                 /* 570, 770x-JL */
6847                 fan_control_access_mode = TPACPI_FAN_WR_ACPI_SFAN;
6848                 fan_control_commands |=
6849                     TPACPI_FAN_CMD_LEVEL | TPACPI_FAN_CMD_ENABLE;
6850         } else {
6851                 if (!gfan_handle) {
6852                         /* gfan without sfan means no fan control */
6853                         /* all other models implement TP EC 0x2f control */
6854
6855                         if (fans_handle) {
6856                                 /* X31, X40, X41 */
6857                                 fan_control_access_mode =
6858                                     TPACPI_FAN_WR_ACPI_FANS;
6859                                 fan_control_commands |=
6860                                     TPACPI_FAN_CMD_SPEED |
6861                                     TPACPI_FAN_CMD_LEVEL |
6862                                     TPACPI_FAN_CMD_ENABLE;
6863                         } else {
6864                                 fan_control_access_mode = TPACPI_FAN_WR_TPEC;
6865                                 fan_control_commands |=
6866                                     TPACPI_FAN_CMD_LEVEL |
6867                                     TPACPI_FAN_CMD_ENABLE;
6868                         }
6869                 }
6870         }
6871
6872         vdbg_printk(TPACPI_DBG_INIT | TPACPI_DBG_FAN,
6873                 "fan is %s, modes %d, %d\n",
6874                 str_supported(fan_status_access_mode != TPACPI_FAN_NONE ||
6875                   fan_control_access_mode != TPACPI_FAN_WR_NONE),
6876                 fan_status_access_mode, fan_control_access_mode);
6877
6878         /* fan control master switch */
6879         if (!fan_control_allowed) {
6880                 fan_control_access_mode = TPACPI_FAN_WR_NONE;
6881                 fan_control_commands = 0;
6882                 dbg_printk(TPACPI_DBG_INIT | TPACPI_DBG_FAN,
6883                            "fan control features disabled by parameter\n");
6884         }
6885
6886         /* update fan_control_desired_level */
6887         if (fan_status_access_mode != TPACPI_FAN_NONE)
6888                 fan_get_status_safe(NULL);
6889
6890         if (fan_status_access_mode != TPACPI_FAN_NONE ||
6891             fan_control_access_mode != TPACPI_FAN_WR_NONE) {
6892                 rc = sysfs_create_group(&tpacpi_sensors_pdev->dev.kobj,
6893                                          &fan_attr_group);
6894                 if (rc < 0)
6895                         return rc;
6896
6897                 rc = driver_create_file(&tpacpi_hwmon_pdriver.driver,
6898                                         &driver_attr_fan_watchdog);
6899                 if (rc < 0) {
6900                         sysfs_remove_group(&tpacpi_sensors_pdev->dev.kobj,
6901                                         &fan_attr_group);
6902                         return rc;
6903                 }
6904                 return 0;
6905         } else
6906                 return 1;
6907 }
6908
6909 static void fan_exit(void)
6910 {
6911         vdbg_printk(TPACPI_DBG_EXIT | TPACPI_DBG_FAN,
6912                     "cancelling any pending fan watchdog tasks\n");
6913
6914         /* FIXME: can we really do this unconditionally? */
6915         sysfs_remove_group(&tpacpi_sensors_pdev->dev.kobj, &fan_attr_group);
6916         driver_remove_file(&tpacpi_hwmon_pdriver.driver,
6917                            &driver_attr_fan_watchdog);
6918
6919         cancel_delayed_work(&fan_watchdog_task);
6920         flush_workqueue(tpacpi_wq);
6921 }
6922
6923 static void fan_suspend(pm_message_t state)
6924 {
6925         int rc;
6926
6927         if (!fan_control_allowed)
6928                 return;
6929
6930         /* Store fan status in cache */
6931         fan_control_resume_level = 0;
6932         rc = fan_get_status_safe(&fan_control_resume_level);
6933         if (rc < 0)
6934                 printk(TPACPI_NOTICE
6935                         "failed to read fan level for later "
6936                         "restore during resume: %d\n", rc);
6937
6938         /* if it is undefined, don't attempt to restore it.
6939          * KEEP THIS LAST */
6940         if (tp_features.fan_ctrl_status_undef)
6941                 fan_control_resume_level = 0;
6942 }
6943
6944 static void fan_resume(void)
6945 {
6946         u8 current_level = 7;
6947         bool do_set = false;
6948         int rc;
6949
6950         /* DSDT *always* updates status on resume */
6951         tp_features.fan_ctrl_status_undef = 0;
6952
6953         if (!fan_control_allowed ||
6954             !fan_control_resume_level ||
6955             (fan_get_status_safe(&current_level) < 0))
6956                 return;
6957
6958         switch (fan_control_access_mode) {
6959         case TPACPI_FAN_WR_ACPI_SFAN:
6960                 /* never decrease fan level */
6961                 do_set = (fan_control_resume_level > current_level);
6962                 break;
6963         case TPACPI_FAN_WR_ACPI_FANS:
6964         case TPACPI_FAN_WR_TPEC:
6965                 /* never decrease fan level, scale is:
6966                  * TP_EC_FAN_FULLSPEED > 7 >= TP_EC_FAN_AUTO
6967                  *
6968                  * We expect the firmware to set either 7 or AUTO, but we
6969                  * handle FULLSPEED out of paranoia.
6970                  *
6971                  * So, we can safely only restore FULLSPEED or 7, anything
6972                  * else could slow the fan.  Restoring AUTO is useless, at
6973                  * best that's exactly what the DSDT already set (it is the
6974                  * slower it uses).
6975                  *
6976                  * Always keep in mind that the DSDT *will* have set the
6977                  * fans to what the vendor supposes is the best level.  We
6978                  * muck with it only to speed the fan up.
6979                  */
6980                 if (fan_control_resume_level != 7 &&
6981                     !(fan_control_resume_level & TP_EC_FAN_FULLSPEED))
6982                         return;
6983                 else
6984                         do_set = !(current_level & TP_EC_FAN_FULLSPEED) &&
6985                                  (current_level != fan_control_resume_level);
6986                 break;
6987         default:
6988                 return;
6989         }
6990         if (do_set) {
6991                 printk(TPACPI_NOTICE
6992                         "restoring fan level to 0x%02x\n",
6993                         fan_control_resume_level);
6994                 rc = fan_set_level_safe(fan_control_resume_level);
6995                 if (rc < 0)
6996                         printk(TPACPI_NOTICE
6997                                 "failed to restore fan level: %d\n", rc);
6998         }
6999 }
7000
7001 static int fan_read(char *p)
7002 {
7003         int len = 0;
7004         int rc;
7005         u8 status;
7006         unsigned int speed = 0;
7007
7008         switch (fan_status_access_mode) {
7009         case TPACPI_FAN_RD_ACPI_GFAN:
7010                 /* 570, 600e/x, 770e, 770x */
7011                 rc = fan_get_status_safe(&status);
7012                 if (rc < 0)
7013                         return rc;
7014
7015                 len += sprintf(p + len, "status:\t\t%s\n"
7016                                "level:\t\t%d\n",
7017                                (status != 0) ? "enabled" : "disabled", status);
7018                 break;
7019
7020         case TPACPI_FAN_RD_TPEC:
7021                 /* all except 570, 600e/x, 770e, 770x */
7022                 rc = fan_get_status_safe(&status);
7023                 if (rc < 0)
7024                         return rc;
7025
7026                 len += sprintf(p + len, "status:\t\t%s\n",
7027                                (status != 0) ? "enabled" : "disabled");
7028
7029                 rc = fan_get_speed(&speed);
7030                 if (rc < 0)
7031                         return rc;
7032
7033                 len += sprintf(p + len, "speed:\t\t%d\n", speed);
7034
7035                 if (status & TP_EC_FAN_FULLSPEED)
7036                         /* Disengaged mode takes precedence */
7037                         len += sprintf(p + len, "level:\t\tdisengaged\n");
7038                 else if (status & TP_EC_FAN_AUTO)
7039                         len += sprintf(p + len, "level:\t\tauto\n");
7040                 else
7041                         len += sprintf(p + len, "level:\t\t%d\n", status);
7042                 break;
7043
7044         case TPACPI_FAN_NONE:
7045         default:
7046                 len += sprintf(p + len, "status:\t\tnot supported\n");
7047         }
7048
7049         if (fan_control_commands & TPACPI_FAN_CMD_LEVEL) {
7050                 len += sprintf(p + len, "commands:\tlevel <level>");
7051
7052                 switch (fan_control_access_mode) {
7053                 case TPACPI_FAN_WR_ACPI_SFAN:
7054                         len += sprintf(p + len, " (<level> is 0-7)\n");
7055                         break;
7056
7057                 default:
7058                         len += sprintf(p + len, " (<level> is 0-7, "
7059                                        "auto, disengaged, full-speed)\n");
7060                         break;
7061                 }
7062         }
7063
7064         if (fan_control_commands & TPACPI_FAN_CMD_ENABLE)
7065                 len += sprintf(p + len, "commands:\tenable, disable\n"
7066                                "commands:\twatchdog <timeout> (<timeout> "
7067                                "is 0 (off), 1-120 (seconds))\n");
7068
7069         if (fan_control_commands & TPACPI_FAN_CMD_SPEED)
7070                 len += sprintf(p + len, "commands:\tspeed <speed>"
7071                                " (<speed> is 0-65535)\n");
7072
7073         return len;
7074 }
7075
7076 static int fan_write_cmd_level(const char *cmd, int *rc)
7077 {
7078         int level;
7079
7080         if (strlencmp(cmd, "level auto") == 0)
7081                 level = TP_EC_FAN_AUTO;
7082         else if ((strlencmp(cmd, "level disengaged") == 0) |
7083                         (strlencmp(cmd, "level full-speed") == 0))
7084                 level = TP_EC_FAN_FULLSPEED;
7085         else if (sscanf(cmd, "level %d", &level) != 1)
7086                 return 0;
7087
7088         *rc = fan_set_level_safe(level);
7089         if (*rc == -ENXIO)
7090                 printk(TPACPI_ERR "level command accepted for unsupported "
7091                        "access mode %d", fan_control_access_mode);
7092         else if (!*rc)
7093                 tpacpi_disclose_usertask("procfs fan",
7094                         "set level to %d\n", level);
7095
7096         return 1;
7097 }
7098
7099 static int fan_write_cmd_enable(const char *cmd, int *rc)
7100 {
7101         if (strlencmp(cmd, "enable") != 0)
7102                 return 0;
7103
7104         *rc = fan_set_enable();
7105         if (*rc == -ENXIO)
7106                 printk(TPACPI_ERR "enable command accepted for unsupported "
7107                        "access mode %d", fan_control_access_mode);
7108         else if (!*rc)
7109                 tpacpi_disclose_usertask("procfs fan", "enable\n");
7110
7111         return 1;
7112 }
7113
7114 static int fan_write_cmd_disable(const char *cmd, int *rc)
7115 {
7116         if (strlencmp(cmd, "disable") != 0)
7117                 return 0;
7118
7119         *rc = fan_set_disable();
7120         if (*rc == -ENXIO)
7121                 printk(TPACPI_ERR "disable command accepted for unsupported "
7122                        "access mode %d", fan_control_access_mode);
7123         else if (!*rc)
7124                 tpacpi_disclose_usertask("procfs fan", "disable\n");
7125
7126         return 1;
7127 }
7128
7129 static int fan_write_cmd_speed(const char *cmd, int *rc)
7130 {
7131         int speed;
7132
7133         /* TODO:
7134          * Support speed <low> <medium> <high> ? */
7135
7136         if (sscanf(cmd, "speed %d", &speed) != 1)
7137                 return 0;
7138
7139         *rc = fan_set_speed(speed);
7140         if (*rc == -ENXIO)
7141                 printk(TPACPI_ERR "speed command accepted for unsupported "
7142                        "access mode %d", fan_control_access_mode);
7143         else if (!*rc)
7144                 tpacpi_disclose_usertask("procfs fan",
7145                         "set speed to %d\n", speed);
7146
7147         return 1;
7148 }
7149
7150 static int fan_write_cmd_watchdog(const char *cmd, int *rc)
7151 {
7152         int interval;
7153
7154         if (sscanf(cmd, "watchdog %d", &interval) != 1)
7155                 return 0;
7156
7157         if (interval < 0 || interval > 120)
7158                 *rc = -EINVAL;
7159         else {
7160                 fan_watchdog_maxinterval = interval;
7161                 tpacpi_disclose_usertask("procfs fan",
7162                         "set watchdog timer to %d\n",
7163                         interval);
7164         }
7165
7166         return 1;
7167 }
7168
7169 static int fan_write(char *buf)
7170 {
7171         char *cmd;
7172         int rc = 0;
7173
7174         while (!rc && (cmd = next_cmd(&buf))) {
7175                 if (!((fan_control_commands & TPACPI_FAN_CMD_LEVEL) &&
7176                       fan_write_cmd_level(cmd, &rc)) &&
7177                     !((fan_control_commands & TPACPI_FAN_CMD_ENABLE) &&
7178                       (fan_write_cmd_enable(cmd, &rc) ||
7179                        fan_write_cmd_disable(cmd, &rc) ||
7180                        fan_write_cmd_watchdog(cmd, &rc))) &&
7181                     !((fan_control_commands & TPACPI_FAN_CMD_SPEED) &&
7182                       fan_write_cmd_speed(cmd, &rc))
7183                     )
7184                         rc = -EINVAL;
7185                 else if (!rc)
7186                         fan_watchdog_reset();
7187         }
7188
7189         return rc;
7190 }
7191
7192 static struct ibm_struct fan_driver_data = {
7193         .name = "fan",
7194         .read = fan_read,
7195         .write = fan_write,
7196         .exit = fan_exit,
7197         .suspend = fan_suspend,
7198         .resume = fan_resume,
7199 };
7200
7201 /****************************************************************************
7202  ****************************************************************************
7203  *
7204  * Infrastructure
7205  *
7206  ****************************************************************************
7207  ****************************************************************************/
7208
7209 /* sysfs name ---------------------------------------------------------- */
7210 static ssize_t thinkpad_acpi_pdev_name_show(struct device *dev,
7211                            struct device_attribute *attr,
7212                            char *buf)
7213 {
7214         return snprintf(buf, PAGE_SIZE, "%s\n", TPACPI_NAME);
7215 }
7216
7217 static struct device_attribute dev_attr_thinkpad_acpi_pdev_name =
7218         __ATTR(name, S_IRUGO, thinkpad_acpi_pdev_name_show, NULL);
7219
7220 /* --------------------------------------------------------------------- */
7221
7222 /* /proc support */
7223 static struct proc_dir_entry *proc_dir;
7224
7225 /*
7226  * Module and infrastructure proble, init and exit handling
7227  */
7228
7229 static int force_load;
7230
7231 #ifdef CONFIG_THINKPAD_ACPI_DEBUG
7232 static const char * __init str_supported(int is_supported)
7233 {
7234         static char text_unsupported[] __initdata = "not supported";
7235
7236         return (is_supported)? &text_unsupported[4] : &text_unsupported[0];
7237 }
7238 #endif /* CONFIG_THINKPAD_ACPI_DEBUG */
7239
7240 static void ibm_exit(struct ibm_struct *ibm)
7241 {
7242         dbg_printk(TPACPI_DBG_EXIT, "removing %s\n", ibm->name);
7243
7244         list_del_init(&ibm->all_drivers);
7245
7246         if (ibm->flags.acpi_notify_installed) {
7247                 dbg_printk(TPACPI_DBG_EXIT,
7248                         "%s: acpi_remove_notify_handler\n", ibm->name);
7249                 BUG_ON(!ibm->acpi);
7250                 acpi_remove_notify_handler(*ibm->acpi->handle,
7251                                            ibm->acpi->type,
7252                                            dispatch_acpi_notify);
7253                 ibm->flags.acpi_notify_installed = 0;
7254                 ibm->flags.acpi_notify_installed = 0;
7255         }
7256
7257         if (ibm->flags.proc_created) {
7258                 dbg_printk(TPACPI_DBG_EXIT,
7259                         "%s: remove_proc_entry\n", ibm->name);
7260                 remove_proc_entry(ibm->name, proc_dir);
7261                 ibm->flags.proc_created = 0;
7262         }
7263
7264         if (ibm->flags.acpi_driver_registered) {
7265                 dbg_printk(TPACPI_DBG_EXIT,
7266                         "%s: acpi_bus_unregister_driver\n", ibm->name);
7267                 BUG_ON(!ibm->acpi);
7268                 acpi_bus_unregister_driver(ibm->acpi->driver);
7269                 kfree(ibm->acpi->driver);
7270                 ibm->acpi->driver = NULL;
7271                 ibm->flags.acpi_driver_registered = 0;
7272         }
7273
7274         if (ibm->flags.init_called && ibm->exit) {
7275                 ibm->exit();
7276                 ibm->flags.init_called = 0;
7277         }
7278
7279         dbg_printk(TPACPI_DBG_INIT, "finished removing %s\n", ibm->name);
7280 }
7281
7282 static int __init ibm_init(struct ibm_init_struct *iibm)
7283 {
7284         int ret;
7285         struct ibm_struct *ibm = iibm->data;
7286         struct proc_dir_entry *entry;
7287
7288         BUG_ON(ibm == NULL);
7289
7290         INIT_LIST_HEAD(&ibm->all_drivers);
7291
7292         if (ibm->flags.experimental && !experimental)
7293                 return 0;
7294
7295         dbg_printk(TPACPI_DBG_INIT,
7296                 "probing for %s\n", ibm->name);
7297
7298         if (iibm->init) {
7299                 ret = iibm->init(iibm);
7300                 if (ret > 0)
7301                         return 0;       /* probe failed */
7302                 if (ret)
7303                         return ret;
7304
7305                 ibm->flags.init_called = 1;
7306         }
7307
7308         if (ibm->acpi) {
7309                 if (ibm->acpi->hid) {
7310                         ret = register_tpacpi_subdriver(ibm);
7311                         if (ret)
7312                                 goto err_out;
7313                 }
7314
7315                 if (ibm->acpi->notify) {
7316                         ret = setup_acpi_notify(ibm);
7317                         if (ret == -ENODEV) {
7318                                 printk(TPACPI_NOTICE "disabling subdriver %s\n",
7319                                         ibm->name);
7320                                 ret = 0;
7321                                 goto err_out;
7322                         }
7323                         if (ret < 0)
7324                                 goto err_out;
7325                 }
7326         }
7327
7328         dbg_printk(TPACPI_DBG_INIT,
7329                 "%s installed\n", ibm->name);
7330
7331         if (ibm->read) {
7332                 entry = create_proc_entry(ibm->name,
7333                                           S_IFREG | S_IRUGO | S_IWUSR,
7334                                           proc_dir);
7335                 if (!entry) {
7336                         printk(TPACPI_ERR "unable to create proc entry %s\n",
7337                                ibm->name);
7338                         ret = -ENODEV;
7339                         goto err_out;
7340                 }
7341                 entry->data = ibm;
7342                 entry->read_proc = &dispatch_procfs_read;
7343                 if (ibm->write)
7344                         entry->write_proc = &dispatch_procfs_write;
7345                 ibm->flags.proc_created = 1;
7346         }
7347
7348         list_add_tail(&ibm->all_drivers, &tpacpi_all_drivers);
7349
7350         return 0;
7351
7352 err_out:
7353         dbg_printk(TPACPI_DBG_INIT,
7354                 "%s: at error exit path with result %d\n",
7355                 ibm->name, ret);
7356
7357         ibm_exit(ibm);
7358         return (ret < 0)? ret : 0;
7359 }
7360
7361 /* Probing */
7362
7363 /* returns 0 - probe ok, or < 0 - probe error.
7364  * Probe ok doesn't mean thinkpad found.
7365  * On error, kfree() cleanup on tp->* is not performed, caller must do it */
7366 static int __must_check __init get_thinkpad_model_data(
7367                                                 struct thinkpad_id_data *tp)
7368 {
7369         const struct dmi_device *dev = NULL;
7370         char ec_fw_string[18];
7371         char const *s;
7372
7373         if (!tp)
7374                 return -EINVAL;
7375
7376         memset(tp, 0, sizeof(*tp));
7377
7378         if (dmi_name_in_vendors("IBM"))
7379                 tp->vendor = PCI_VENDOR_ID_IBM;
7380         else if (dmi_name_in_vendors("LENOVO"))
7381                 tp->vendor = PCI_VENDOR_ID_LENOVO;
7382         else
7383                 return 0;
7384
7385         s = dmi_get_system_info(DMI_BIOS_VERSION);
7386         tp->bios_version_str = kstrdup(s, GFP_KERNEL);
7387         if (s && !tp->bios_version_str)
7388                 return -ENOMEM;
7389         if (!tp->bios_version_str)
7390                 return 0;
7391         tp->bios_model = tp->bios_version_str[0]
7392                          | (tp->bios_version_str[1] << 8);
7393
7394         /*
7395          * ThinkPad T23 or newer, A31 or newer, R50e or newer,
7396          * X32 or newer, all Z series;  Some models must have an
7397          * up-to-date BIOS or they will not be detected.
7398          *
7399          * See http://thinkwiki.org/wiki/List_of_DMI_IDs
7400          */
7401         while ((dev = dmi_find_device(DMI_DEV_TYPE_OEM_STRING, NULL, dev))) {
7402                 if (sscanf(dev->name,
7403                            "IBM ThinkPad Embedded Controller -[%17c",
7404                            ec_fw_string) == 1) {
7405                         ec_fw_string[sizeof(ec_fw_string) - 1] = 0;
7406                         ec_fw_string[strcspn(ec_fw_string, " ]")] = 0;
7407
7408                         tp->ec_version_str = kstrdup(ec_fw_string, GFP_KERNEL);
7409                         if (!tp->ec_version_str)
7410                                 return -ENOMEM;
7411                         tp->ec_model = ec_fw_string[0]
7412                                         | (ec_fw_string[1] << 8);
7413                         break;
7414                 }
7415         }
7416
7417         s = dmi_get_system_info(DMI_PRODUCT_VERSION);
7418         if (s && !strnicmp(s, "ThinkPad", 8)) {
7419                 tp->model_str = kstrdup(s, GFP_KERNEL);
7420                 if (!tp->model_str)
7421                         return -ENOMEM;
7422         }
7423
7424         s = dmi_get_system_info(DMI_PRODUCT_NAME);
7425         tp->nummodel_str = kstrdup(s, GFP_KERNEL);
7426         if (s && !tp->nummodel_str)
7427                 return -ENOMEM;
7428
7429         return 0;
7430 }
7431
7432 static int __init probe_for_thinkpad(void)
7433 {
7434         int is_thinkpad;
7435
7436         if (acpi_disabled)
7437                 return -ENODEV;
7438
7439         /*
7440          * Non-ancient models have better DMI tagging, but very old models
7441          * don't.
7442          */
7443         is_thinkpad = (thinkpad_id.model_str != NULL);
7444
7445         /* ec is required because many other handles are relative to it */
7446         TPACPI_ACPIHANDLE_INIT(ec);
7447         if (!ec_handle) {
7448                 if (is_thinkpad)
7449                         printk(TPACPI_ERR
7450                                 "Not yet supported ThinkPad detected!\n");
7451                 return -ENODEV;
7452         }
7453
7454         /*
7455          * Risks a regression on very old machines, but reduces potential
7456          * false positives a damn great deal
7457          */
7458         if (!is_thinkpad)
7459                 is_thinkpad = (thinkpad_id.vendor == PCI_VENDOR_ID_IBM);
7460
7461         if (!is_thinkpad && !force_load)
7462                 return -ENODEV;
7463
7464         return 0;
7465 }
7466
7467
7468 /* Module init, exit, parameters */
7469
7470 static struct ibm_init_struct ibms_init[] __initdata = {
7471         {
7472                 .init = thinkpad_acpi_driver_init,
7473                 .data = &thinkpad_acpi_driver_data,
7474         },
7475         {
7476                 .init = hotkey_init,
7477                 .data = &hotkey_driver_data,
7478         },
7479         {
7480                 .init = bluetooth_init,
7481                 .data = &bluetooth_driver_data,
7482         },
7483         {
7484                 .init = wan_init,
7485                 .data = &wan_driver_data,
7486         },
7487         {
7488                 .init = uwb_init,
7489                 .data = &uwb_driver_data,
7490         },
7491 #ifdef CONFIG_THINKPAD_ACPI_VIDEO
7492         {
7493                 .init = video_init,
7494                 .data = &video_driver_data,
7495         },
7496 #endif
7497         {
7498                 .init = light_init,
7499                 .data = &light_driver_data,
7500         },
7501 #ifdef CONFIG_THINKPAD_ACPI_DOCK
7502         {
7503                 .init = dock_init,
7504                 .data = &dock_driver_data[0],
7505         },
7506         {
7507                 .init = dock_init2,
7508                 .data = &dock_driver_data[1],
7509         },
7510 #endif
7511 #ifdef CONFIG_THINKPAD_ACPI_BAY
7512         {
7513                 .init = bay_init,
7514                 .data = &bay_driver_data,
7515         },
7516 #endif
7517         {
7518                 .init = cmos_init,
7519                 .data = &cmos_driver_data,
7520         },
7521         {
7522                 .init = led_init,
7523                 .data = &led_driver_data,
7524         },
7525         {
7526                 .init = beep_init,
7527                 .data = &beep_driver_data,
7528         },
7529         {
7530                 .init = thermal_init,
7531                 .data = &thermal_driver_data,
7532         },
7533         {
7534                 .data = &ecdump_driver_data,
7535         },
7536         {
7537                 .init = brightness_init,
7538                 .data = &brightness_driver_data,
7539         },
7540         {
7541                 .data = &volume_driver_data,
7542         },
7543         {
7544                 .init = fan_init,
7545                 .data = &fan_driver_data,
7546         },
7547 };
7548
7549 static int __init set_ibm_param(const char *val, struct kernel_param *kp)
7550 {
7551         unsigned int i;
7552         struct ibm_struct *ibm;
7553
7554         if (!kp || !kp->name || !val)
7555                 return -EINVAL;
7556
7557         for (i = 0; i < ARRAY_SIZE(ibms_init); i++) {
7558                 ibm = ibms_init[i].data;
7559                 WARN_ON(ibm == NULL);
7560
7561                 if (!ibm || !ibm->name)
7562                         continue;
7563
7564                 if (strcmp(ibm->name, kp->name) == 0 && ibm->write) {
7565                         if (strlen(val) > sizeof(ibms_init[i].param) - 2)
7566                                 return -ENOSPC;
7567                         strcpy(ibms_init[i].param, val);
7568                         strcat(ibms_init[i].param, ",");
7569                         return 0;
7570                 }
7571         }
7572
7573         return -EINVAL;
7574 }
7575
7576 module_param(experimental, int, 0);
7577 MODULE_PARM_DESC(experimental,
7578                  "Enables experimental features when non-zero");
7579
7580 module_param_named(debug, dbg_level, uint, 0);
7581 MODULE_PARM_DESC(debug, "Sets debug level bit-mask");
7582
7583 module_param(force_load, bool, 0);
7584 MODULE_PARM_DESC(force_load,
7585                  "Attempts to load the driver even on a "
7586                  "mis-identified ThinkPad when true");
7587
7588 module_param_named(fan_control, fan_control_allowed, bool, 0);
7589 MODULE_PARM_DESC(fan_control,
7590                  "Enables setting fan parameters features when true");
7591
7592 module_param_named(brightness_mode, brightness_mode, uint, 0);
7593 MODULE_PARM_DESC(brightness_mode,
7594                  "Selects brightness control strategy: "
7595                  "0=auto, 1=EC, 2=UCMS, 3=EC+NVRAM");
7596
7597 module_param(brightness_enable, uint, 0);
7598 MODULE_PARM_DESC(brightness_enable,
7599                  "Enables backlight control when 1, disables when 0");
7600
7601 module_param(hotkey_report_mode, uint, 0);
7602 MODULE_PARM_DESC(hotkey_report_mode,
7603                  "used for backwards compatibility with userspace, "
7604                  "see documentation");
7605
7606 #define TPACPI_PARAM(feature) \
7607         module_param_call(feature, set_ibm_param, NULL, NULL, 0); \
7608         MODULE_PARM_DESC(feature, "Simulates thinkpad-acpi procfs command " \
7609                          "at module load, see documentation")
7610
7611 TPACPI_PARAM(hotkey);
7612 TPACPI_PARAM(bluetooth);
7613 TPACPI_PARAM(video);
7614 TPACPI_PARAM(light);
7615 #ifdef CONFIG_THINKPAD_ACPI_DOCK
7616 TPACPI_PARAM(dock);
7617 #endif
7618 #ifdef CONFIG_THINKPAD_ACPI_BAY
7619 TPACPI_PARAM(bay);
7620 #endif /* CONFIG_THINKPAD_ACPI_BAY */
7621 TPACPI_PARAM(cmos);
7622 TPACPI_PARAM(led);
7623 TPACPI_PARAM(beep);
7624 TPACPI_PARAM(ecdump);
7625 TPACPI_PARAM(brightness);
7626 TPACPI_PARAM(volume);
7627 TPACPI_PARAM(fan);
7628
7629 #ifdef CONFIG_THINKPAD_ACPI_DEBUGFACILITIES
7630 module_param(dbg_wlswemul, uint, 0);
7631 MODULE_PARM_DESC(dbg_wlswemul, "Enables WLSW emulation");
7632 module_param_named(wlsw_state, tpacpi_wlsw_emulstate, bool, 0);
7633 MODULE_PARM_DESC(wlsw_state,
7634                  "Initial state of the emulated WLSW switch");
7635
7636 module_param(dbg_bluetoothemul, uint, 0);
7637 MODULE_PARM_DESC(dbg_bluetoothemul, "Enables bluetooth switch emulation");
7638 module_param_named(bluetooth_state, tpacpi_bluetooth_emulstate, bool, 0);
7639 MODULE_PARM_DESC(bluetooth_state,
7640                  "Initial state of the emulated bluetooth switch");
7641
7642 module_param(dbg_wwanemul, uint, 0);
7643 MODULE_PARM_DESC(dbg_wwanemul, "Enables WWAN switch emulation");
7644 module_param_named(wwan_state, tpacpi_wwan_emulstate, bool, 0);
7645 MODULE_PARM_DESC(wwan_state,
7646                  "Initial state of the emulated WWAN switch");
7647
7648 module_param(dbg_uwbemul, uint, 0);
7649 MODULE_PARM_DESC(dbg_uwbemul, "Enables UWB switch emulation");
7650 module_param_named(uwb_state, tpacpi_uwb_emulstate, bool, 0);
7651 MODULE_PARM_DESC(uwb_state,
7652                  "Initial state of the emulated UWB switch");
7653 #endif
7654
7655 static void thinkpad_acpi_module_exit(void)
7656 {
7657         struct ibm_struct *ibm, *itmp;
7658
7659         tpacpi_lifecycle = TPACPI_LIFE_EXITING;
7660
7661         list_for_each_entry_safe_reverse(ibm, itmp,
7662                                          &tpacpi_all_drivers,
7663                                          all_drivers) {
7664                 ibm_exit(ibm);
7665         }
7666
7667         dbg_printk(TPACPI_DBG_INIT, "finished subdriver exit path...\n");
7668
7669         if (tpacpi_inputdev) {
7670                 if (tp_features.input_device_registered)
7671                         input_unregister_device(tpacpi_inputdev);
7672                 else
7673                         input_free_device(tpacpi_inputdev);
7674         }
7675
7676         if (tpacpi_hwmon)
7677                 hwmon_device_unregister(tpacpi_hwmon);
7678
7679         if (tp_features.sensors_pdev_attrs_registered)
7680                 device_remove_file(&tpacpi_sensors_pdev->dev,
7681                                    &dev_attr_thinkpad_acpi_pdev_name);
7682         if (tpacpi_sensors_pdev)
7683                 platform_device_unregister(tpacpi_sensors_pdev);
7684         if (tpacpi_pdev)
7685                 platform_device_unregister(tpacpi_pdev);
7686
7687         if (tp_features.sensors_pdrv_attrs_registered)
7688                 tpacpi_remove_driver_attributes(&tpacpi_hwmon_pdriver.driver);
7689         if (tp_features.platform_drv_attrs_registered)
7690                 tpacpi_remove_driver_attributes(&tpacpi_pdriver.driver);
7691
7692         if (tp_features.sensors_pdrv_registered)
7693                 platform_driver_unregister(&tpacpi_hwmon_pdriver);
7694
7695         if (tp_features.platform_drv_registered)
7696                 platform_driver_unregister(&tpacpi_pdriver);
7697
7698         if (proc_dir)
7699                 remove_proc_entry(TPACPI_PROC_DIR, acpi_root_dir);
7700
7701         if (tpacpi_wq)
7702                 destroy_workqueue(tpacpi_wq);
7703
7704         kfree(thinkpad_id.bios_version_str);
7705         kfree(thinkpad_id.ec_version_str);
7706         kfree(thinkpad_id.model_str);
7707 }
7708
7709
7710 static int __init thinkpad_acpi_module_init(void)
7711 {
7712         int ret, i;
7713
7714         tpacpi_lifecycle = TPACPI_LIFE_INIT;
7715
7716         /* Parameter checking */
7717         if (hotkey_report_mode > 2)
7718                 return -EINVAL;
7719
7720         /* Driver-level probe */
7721
7722         ret = get_thinkpad_model_data(&thinkpad_id);
7723         if (ret) {
7724                 printk(TPACPI_ERR
7725                         "unable to get DMI data: %d\n", ret);
7726                 thinkpad_acpi_module_exit();
7727                 return ret;
7728         }
7729         ret = probe_for_thinkpad();
7730         if (ret) {
7731                 thinkpad_acpi_module_exit();
7732                 return ret;
7733         }
7734
7735         /* Driver initialization */
7736
7737         TPACPI_ACPIHANDLE_INIT(ecrd);
7738         TPACPI_ACPIHANDLE_INIT(ecwr);
7739
7740         tpacpi_wq = create_singlethread_workqueue(TPACPI_WORKQUEUE_NAME);
7741         if (!tpacpi_wq) {
7742                 thinkpad_acpi_module_exit();
7743                 return -ENOMEM;
7744         }
7745
7746         proc_dir = proc_mkdir(TPACPI_PROC_DIR, acpi_root_dir);
7747         if (!proc_dir) {
7748                 printk(TPACPI_ERR
7749                        "unable to create proc dir " TPACPI_PROC_DIR);
7750                 thinkpad_acpi_module_exit();
7751                 return -ENODEV;
7752         }
7753
7754         ret = platform_driver_register(&tpacpi_pdriver);
7755         if (ret) {
7756                 printk(TPACPI_ERR
7757                        "unable to register main platform driver\n");
7758                 thinkpad_acpi_module_exit();
7759                 return ret;
7760         }
7761         tp_features.platform_drv_registered = 1;
7762
7763         ret = platform_driver_register(&tpacpi_hwmon_pdriver);
7764         if (ret) {
7765                 printk(TPACPI_ERR
7766                        "unable to register hwmon platform driver\n");
7767                 thinkpad_acpi_module_exit();
7768                 return ret;
7769         }
7770         tp_features.sensors_pdrv_registered = 1;
7771
7772         ret = tpacpi_create_driver_attributes(&tpacpi_pdriver.driver);
7773         if (!ret) {
7774                 tp_features.platform_drv_attrs_registered = 1;
7775                 ret = tpacpi_create_driver_attributes(
7776                                         &tpacpi_hwmon_pdriver.driver);
7777         }
7778         if (ret) {
7779                 printk(TPACPI_ERR
7780                        "unable to create sysfs driver attributes\n");
7781                 thinkpad_acpi_module_exit();
7782                 return ret;
7783         }
7784         tp_features.sensors_pdrv_attrs_registered = 1;
7785
7786
7787         /* Device initialization */
7788         tpacpi_pdev = platform_device_register_simple(TPACPI_DRVR_NAME, -1,
7789                                                         NULL, 0);
7790         if (IS_ERR(tpacpi_pdev)) {
7791                 ret = PTR_ERR(tpacpi_pdev);
7792                 tpacpi_pdev = NULL;
7793                 printk(TPACPI_ERR "unable to register platform device\n");
7794                 thinkpad_acpi_module_exit();
7795                 return ret;
7796         }
7797         tpacpi_sensors_pdev = platform_device_register_simple(
7798                                                 TPACPI_HWMON_DRVR_NAME,
7799                                                 -1, NULL, 0);
7800         if (IS_ERR(tpacpi_sensors_pdev)) {
7801                 ret = PTR_ERR(tpacpi_sensors_pdev);
7802                 tpacpi_sensors_pdev = NULL;
7803                 printk(TPACPI_ERR
7804                        "unable to register hwmon platform device\n");
7805                 thinkpad_acpi_module_exit();
7806                 return ret;
7807         }
7808         ret = device_create_file(&tpacpi_sensors_pdev->dev,
7809                                  &dev_attr_thinkpad_acpi_pdev_name);
7810         if (ret) {
7811                 printk(TPACPI_ERR
7812                        "unable to create sysfs hwmon device attributes\n");
7813                 thinkpad_acpi_module_exit();
7814                 return ret;
7815         }
7816         tp_features.sensors_pdev_attrs_registered = 1;
7817         tpacpi_hwmon = hwmon_device_register(&tpacpi_sensors_pdev->dev);
7818         if (IS_ERR(tpacpi_hwmon)) {
7819                 ret = PTR_ERR(tpacpi_hwmon);
7820                 tpacpi_hwmon = NULL;
7821                 printk(TPACPI_ERR "unable to register hwmon device\n");
7822                 thinkpad_acpi_module_exit();
7823                 return ret;
7824         }
7825         mutex_init(&tpacpi_inputdev_send_mutex);
7826         tpacpi_inputdev = input_allocate_device();
7827         if (!tpacpi_inputdev) {
7828                 printk(TPACPI_ERR "unable to allocate input device\n");
7829                 thinkpad_acpi_module_exit();
7830                 return -ENOMEM;
7831         } else {
7832                 /* Prepare input device, but don't register */
7833                 tpacpi_inputdev->name = "ThinkPad Extra Buttons";
7834                 tpacpi_inputdev->phys = TPACPI_DRVR_NAME "/input0";
7835                 tpacpi_inputdev->id.bustype = BUS_HOST;
7836                 tpacpi_inputdev->id.vendor = (thinkpad_id.vendor) ?
7837                                                 thinkpad_id.vendor :
7838                                                 PCI_VENDOR_ID_IBM;
7839                 tpacpi_inputdev->id.product = TPACPI_HKEY_INPUT_PRODUCT;
7840                 tpacpi_inputdev->id.version = TPACPI_HKEY_INPUT_VERSION;
7841         }
7842         for (i = 0; i < ARRAY_SIZE(ibms_init); i++) {
7843                 ret = ibm_init(&ibms_init[i]);
7844                 if (ret >= 0 && *ibms_init[i].param)
7845                         ret = ibms_init[i].data->write(ibms_init[i].param);
7846                 if (ret < 0) {
7847                         thinkpad_acpi_module_exit();
7848                         return ret;
7849                 }
7850         }
7851         ret = input_register_device(tpacpi_inputdev);
7852         if (ret < 0) {
7853                 printk(TPACPI_ERR "unable to register input device\n");
7854                 thinkpad_acpi_module_exit();
7855                 return ret;
7856         } else {
7857                 tp_features.input_device_registered = 1;
7858         }
7859
7860         tpacpi_lifecycle = TPACPI_LIFE_RUNNING;
7861         return 0;
7862 }
7863
7864 MODULE_ALIAS(TPACPI_DRVR_SHORTNAME);
7865
7866 /*
7867  * DMI matching for module autoloading
7868  *
7869  * See http://thinkwiki.org/wiki/List_of_DMI_IDs
7870  * See http://thinkwiki.org/wiki/BIOS_Upgrade_Downloads
7871  *
7872  * Only models listed in thinkwiki will be supported, so add yours
7873  * if it is not there yet.
7874  */
7875 #define IBM_BIOS_MODULE_ALIAS(__type) \
7876         MODULE_ALIAS("dmi:bvnIBM:bvr" __type "ET??WW*")
7877
7878 /* Non-ancient thinkpads */
7879 MODULE_ALIAS("dmi:bvnIBM:*:svnIBM:*:pvrThinkPad*:rvnIBM:*");
7880 MODULE_ALIAS("dmi:bvnLENOVO:*:svnLENOVO:*:pvrThinkPad*:rvnLENOVO:*");
7881
7882 /* Ancient thinkpad BIOSes have to be identified by
7883  * BIOS type or model number, and there are far less
7884  * BIOS types than model numbers... */
7885 IBM_BIOS_MODULE_ALIAS("I[BDHIMNOTWVYZ]");
7886 IBM_BIOS_MODULE_ALIAS("1[0368A-GIKM-PST]");
7887 IBM_BIOS_MODULE_ALIAS("K[UX-Z]");
7888
7889 MODULE_AUTHOR("Borislav Deianov, Henrique de Moraes Holschuh");
7890 MODULE_DESCRIPTION(TPACPI_DESC);
7891 MODULE_VERSION(TPACPI_VERSION);
7892 MODULE_LICENSE("GPL");
7893
7894 module_init(thinkpad_acpi_module_init);
7895 module_exit(thinkpad_acpi_module_exit);