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   1 /*
   2  *  thinkpad_acpi.c - ThinkPad ACPI Extras
   3  *
   4  *
   5  *  Copyright (C) 2004-2005 Borislav Deianov <borislav@users.sf.net>
   6  *  Copyright (C) 2006-2008 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 "0.21"
  25 #define TPACPI_SYSFS_VERSION 0x020200
  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/kthread.h>
  58 #include <linux/freezer.h>
  59 #include <linux/delay.h>
  60
  61 #include <linux/nvram.h>
  62 #include <linux/proc_fs.h>
  63 #include <linux/sysfs.h>
  64 #include <linux/backlight.h>
  65 #include <linux/fb.h>
  66 #include <linux/platform_device.h>
  67 #include <linux/hwmon.h>
  68 #include <linux/hwmon-sysfs.h>
  69 #include <linux/input.h>
  70 #include <linux/leds.h>
  71 #include <linux/rfkill.h>
  72 #include <asm/uaccess.h>
  73
  74 #include <linux/dmi.h>
  75 #include <linux/jiffies.h>
  76 #include <linux/workqueue.h>
  77
  78 #include <acpi/acpi_drivers.h>
  79 #include <acpi/acnamesp.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
 127 /****************************************************************************
 128  * Main driver
 129  */
 130
 131 #define TPACPI_NAME "thinkpad"
 132 #define TPACPI_DESC "ThinkPad ACPI Extras"
 133 #define TPACPI_FILE TPACPI_NAME "_acpi"
 134 #define TPACPI_URL "http://ibm-acpi.sf.net/"
 135 #define TPACPI_MAIL "ibm-acpi-devel@lists.sourceforge.net"
 136
 137 #define TPACPI_PROC_DIR "ibm"
 138 #define TPACPI_ACPI_EVENT_PREFIX "ibm"
 139 #define TPACPI_DRVR_NAME TPACPI_FILE
 140 #define TPACPI_DRVR_SHORTNAME "tpacpi"
 141 #define TPACPI_HWMON_DRVR_NAME TPACPI_NAME "_hwmon"
 142
 143 #define TPACPI_NVRAM_KTHREAD_NAME "ktpacpi_nvramd"
 144 #define TPACPI_WORKQUEUE_NAME "ktpacpid"
 145
 146 #define TPACPI_MAX_ACPI_ARGS 3
 147
 148 /* rfkill switches */
 149 enum {
 150         TPACPI_RFK_BLUETOOTH_SW_ID = 0,
 151         TPACPI_RFK_WWAN_SW_ID,
 152 };
 153
 154 /* Debugging */
 155 #define TPACPI_LOG TPACPI_FILE ": "
 156 #define TPACPI_ERR         KERN_ERR    TPACPI_LOG
 157 #define TPACPI_NOTICE KERN_NOTICE TPACPI_LOG
 158 #define TPACPI_INFO   KERN_INFO   TPACPI_LOG
 159 #define TPACPI_DEBUG  KERN_DEBUG  TPACPI_LOG
 160
 161 #define TPACPI_DBG_ALL          0xffff
 162 #define TPACPI_DBG_ALL          0xffff
 163 #define TPACPI_DBG_INIT         0x0001
 164 #define TPACPI_DBG_EXIT         0x0002
 165 #define dbg_printk(a_dbg_level, format, arg...) \
 166         do { if (dbg_level & a_dbg_level) \
 167                 printk(TPACPI_DEBUG "%s: " format, __func__ , ## arg); \
 168         } while (0)
 169 #ifdef CONFIG_THINKPAD_ACPI_DEBUG
 170 #define vdbg_printk(a_dbg_level, format, arg...) \
 171         dbg_printk(a_dbg_level, format, ## arg)
 172 static const char *str_supported(int is_supported);
 173 #else
 174 #define vdbg_printk(a_dbg_level, format, arg...)
 175 #endif
 176
 177 #define onoff(status, bit) ((status) & (1 << (bit)) ? "on" : "off")
 178 #define enabled(status, bit) ((status) & (1 << (bit)) ? "enabled" : "disabled")
 179 #define strlencmp(a, b) (strncmp((a), (b), strlen(b)))
 180
 181
 182 /****************************************************************************
 183  * Driver-wide structs and misc. variables
 184  */
 185
 186 struct ibm_struct;
 187
 188 struct tp_acpi_drv_struct {
 189         const struct acpi_device_id *hid;
 190         struct acpi_driver *driver;
 191
 192         void (*notify) (struct ibm_struct *, u32);
 193         acpi_handle *handle;
 194         u32 type;
 195         struct acpi_device *device;
 196 };
 197
 198 struct ibm_struct {
 199         char *name;
 200
 201         int (*read) (char *);
 202         int (*write) (char *);
 203         void (*exit) (void);
 204         void (*resume) (void);
 205         void (*suspend) (pm_message_t state);
 206
 207         struct list_head all_drivers;
 208
 209         struct tp_acpi_drv_struct *acpi;
 210
 211         struct {
 212                 u8 acpi_driver_registered:1;
 213                 u8 acpi_notify_installed:1;
 214                 u8 proc_created:1;
 215                 u8 init_called:1;
 216                 u8 experimental:1;
 217         } flags;
 218 };
 219
 220 struct ibm_init_struct {
 221         char param[32];
 222
 223         int (*init) (struct ibm_init_struct *);
 224         struct ibm_struct *data;
 225 };
 226
 227 static struct {
 228 #ifdef CONFIG_THINKPAD_ACPI_BAY
 229         u32 bay_status:1;
 230         u32 bay_eject:1;
 231         u32 bay_status2:1;
 232         u32 bay_eject2:1;
 233 #endif
 234         u32 bluetooth:1;
 235         u32 hotkey:1;
 236         u32 hotkey_mask:1;
 237         u32 hotkey_wlsw:1;
 238         u32 hotkey_tablet:1;
 239         u32 light:1;
 240         u32 light_status:1;
 241         u32 bright_16levels:1;
 242         u32 bright_acpimode:1;
 243         u32 wan:1;
 244         u32 fan_ctrl_status_undef:1;
 245         u32 input_device_registered:1;
 246         u32 platform_drv_registered:1;
 247         u32 platform_drv_attrs_registered:1;
 248         u32 sensors_pdrv_registered:1;
 249         u32 sensors_pdrv_attrs_registered:1;
 250         u32 sensors_pdev_attrs_registered:1;
 251         u32 hotkey_poll_active:1;
 252 } tp_features;
 253
 254 static struct {
 255         u16 hotkey_mask_ff:1;
 256         u16 bright_cmos_ec_unsync:1;
 257 } tp_warned;
 258
 259 struct thinkpad_id_data {
 260         unsigned int vendor;    /* ThinkPad vendor:
 261                                  * PCI_VENDOR_ID_IBM/PCI_VENDOR_ID_LENOVO */
 262
 263         char *bios_version_str; /* Something like 1ZET51WW (1.03z) */
 264         char *ec_version_str;   /* Something like 1ZHT51WW-1.04a */
 265
 266         u16 bios_model;         /* Big Endian, TP-1Y = 0x5931, 0 = unknown */
 267         u16 ec_model;
 268
 269         char *model_str;        /* ThinkPad T43 */
 270         char *nummodel_str;     /* 9384A9C for a 9384-A9C model */
 271 };
 272 static struct thinkpad_id_data thinkpad_id;
 273
 274 static enum {
 275         TPACPI_LIFE_INIT = 0,
 276         TPACPI_LIFE_RUNNING,
 277         TPACPI_LIFE_EXITING,
 278 } tpacpi_lifecycle;
 279
 280 static int experimental;
 281 static u32 dbg_level;
 282
 283 static struct workqueue_struct *tpacpi_wq;
 284
 285 /* Special LED class that can defer work */
 286 struct tpacpi_led_classdev {
 287         struct led_classdev led_classdev;
 288         struct work_struct work;
 289         enum led_brightness new_brightness;
 290         unsigned int led;
 291 };
 292
 293 /****************************************************************************
 294  ****************************************************************************
 295  *
 296  * ACPI Helpers and device model
 297  *
 298  ****************************************************************************
 299  ****************************************************************************/
 300
 301 /*************************************************************************
 302  * ACPI basic handles
 303  */
 304
 305 static acpi_handle root_handle;
 306
 307 #define TPACPI_HANDLE(object, parent, paths...)                 \
 308         static acpi_handle  object##_handle;                    \
 309         static acpi_handle *object##_parent = &parent##_handle; \
 310         static char        *object##_path;                      \
 311         static char        *object##_paths[] = { paths }
 312
 313 TPACPI_HANDLE(ec, root, "\\_SB.PCI0.ISA.EC0",   /* 240, 240x */
 314            "\\_SB.PCI.ISA.EC",  /* 570 */
 315            "\\_SB.PCI0.ISA0.EC0",       /* 600e/x, 770e, 770x */
 316            "\\_SB.PCI0.ISA.EC", /* A21e, A2xm/p, T20-22, X20-21 */
 317            "\\_SB.PCI0.AD4S.EC0",       /* i1400, R30 */
 318            "\\_SB.PCI0.ICH3.EC0",       /* R31 */
 319            "\\_SB.PCI0.LPC.EC", /* all others */
 320            );
 321
 322 TPACPI_HANDLE(ecrd, ec, "ECRD");        /* 570 */
 323 TPACPI_HANDLE(ecwr, ec, "ECWR");        /* 570 */
 324
 325 TPACPI_HANDLE(cmos, root, "\\UCMS",     /* R50, R50e, R50p, R51, */
 326                                         /* T4x, X31, X40 */
 327            "\\CMOS",            /* A3x, G4x, R32, T23, T30, X22-24, X30 */
 328            "\\CMS",             /* R40, R40e */
 329            );                   /* all others */
 330
 331 TPACPI_HANDLE(hkey, ec, "\\_SB.HKEY",   /* 600e/x, 770e, 770x */
 332            "^HKEY",             /* R30, R31 */
 333            "HKEY",              /* all others */
 334            );                   /* 570 */
 335
 336 TPACPI_HANDLE(vid, root, "\\_SB.PCI.AGP.VGA",   /* 570 */
 337            "\\_SB.PCI0.AGP0.VID0",      /* 600e/x, 770x */
 338            "\\_SB.PCI0.VID0",   /* 770e */
 339            "\\_SB.PCI0.VID",    /* A21e, G4x, R50e, X30, X40 */
 340            "\\_SB.PCI0.AGP.VID",        /* all others */
 341            );                           /* R30, R31 */
 342
 343
 344 /*************************************************************************
 345  * ACPI helpers
 346  */
 347
 348 static int acpi_evalf(acpi_handle handle,
 349                       void *res, char *method, char *fmt, ...)
 350 {
 351         char *fmt0 = fmt;
 352         struct acpi_object_list params;
 353         union acpi_object in_objs[TPACPI_MAX_ACPI_ARGS];
 354         struct acpi_buffer result, *resultp;
 355         union acpi_object out_obj;
 356         acpi_status status;
 357         va_list ap;
 358         char res_type;
 359         int success;
 360         int quiet;
 361
 362         if (!*fmt) {
 363                 printk(TPACPI_ERR "acpi_evalf() called with empty format\n");
 364                 return 0;
 365         }
 366
 367         if (*fmt == 'q') {
 368                 quiet = 1;
 369                 fmt++;
 370         } else
 371                 quiet = 0;
 372
 373         res_type = *(fmt++);
 374
 375         params.count = 0;
 376         params.pointer = &in_objs[0];
 377
 378         va_start(ap, fmt);
 379         while (*fmt) {
 380                 char c = *(fmt++);
 381                 switch (c) {
 382                 case 'd':       /* int */
 383                         in_objs[params.count].integer.value = va_arg(ap, int);
 384                         in_objs[params.count++].type = ACPI_TYPE_INTEGER;
 385                         break;
 386                         /* add more types as needed */
 387                 default:
 388                         printk(TPACPI_ERR "acpi_evalf() called "
 389                                "with invalid format character '%c'\n", c);
 390                         return 0;
 391                 }
 392         }
 393         va_end(ap);
 394
 395         if (res_type != 'v') {
 396                 result.length = sizeof(out_obj);
 397                 result.pointer = &out_obj;
 398                 resultp = &result;
 399         } else
 400                 resultp = NULL;
 401
 402         status = acpi_evaluate_object(handle, method, &params, resultp);
 403
 404         switch (res_type) {
 405         case 'd':               /* int */
 406                 if (res)
 407                         *(int *)res = out_obj.integer.value;
 408                 success = status == AE_OK && out_obj.type == ACPI_TYPE_INTEGER;
 409                 break;
 410         case 'v':               /* void */
 411                 success = status == AE_OK;
 412                 break;
 413                 /* add more types as needed */
 414         default:
 415                 printk(TPACPI_ERR "acpi_evalf() called "
 416                        "with invalid format character '%c'\n", res_type);
 417                 return 0;
 418         }
 419
 420         if (!success && !quiet)
 421                 printk(TPACPI_ERR "acpi_evalf(%s, %s, ...) failed: %d\n",
 422                        method, fmt0, status);
 423
 424         return success;
 425 }
 426
 427 static int acpi_ec_read(int i, u8 *p)
 428 {
 429         int v;
 430
 431         if (ecrd_handle) {
 432                 if (!acpi_evalf(ecrd_handle, &v, NULL, "dd", i))
 433                         return 0;
 434                 *p = v;
 435         } else {
 436                 if (ec_read(i, p) < 0)
 437                         return 0;
 438         }
 439
 440         return 1;
 441 }
 442
 443 static int acpi_ec_write(int i, u8 v)
 444 {
 445         if (ecwr_handle) {
 446                 if (!acpi_evalf(ecwr_handle, NULL, NULL, "vdd", i, v))
 447                         return 0;
 448         } else {
 449                 if (ec_write(i, v) < 0)
 450                         return 0;
 451         }
 452
 453         return 1;
 454 }
 455
 456 #if defined(CONFIG_THINKPAD_ACPI_DOCK) || defined(CONFIG_THINKPAD_ACPI_BAY)
 457 static int _sta(acpi_handle handle)
 458 {
 459         int status;
 460
 461         if (!handle || !acpi_evalf(handle, &status, "_STA", "d"))
 462                 status = 0;
 463
 464         return status;
 465 }
 466 #endif
 467
 468 static int issue_thinkpad_cmos_command(int cmos_cmd)
 469 {
 470         if (!cmos_handle)
 471                 return -ENXIO;
 472
 473         if (!acpi_evalf(cmos_handle, NULL, NULL, "vd", cmos_cmd))
 474                 return -EIO;
 475
 476         return 0;
 477 }
 478
 479 /*************************************************************************
 480  * ACPI device model
 481  */
 482
 483 #define TPACPI_ACPIHANDLE_INIT(object) \
 484         drv_acpi_handle_init(#object, &object##_handle, *object##_parent, \
 485                 object##_paths, ARRAY_SIZE(object##_paths), &object##_path)
 486
 487 static void drv_acpi_handle_init(char *name,
 488                            acpi_handle *handle, acpi_handle parent,
 489                            char **paths, int num_paths, char **path)
 490 {
 491         int i;
 492         acpi_status status;
 493
 494         vdbg_printk(TPACPI_DBG_INIT, "trying to locate ACPI handle for %s\n",
 495                 name);
 496
 497         for (i = 0; i < num_paths; i++) {
 498                 status = acpi_get_handle(parent, paths[i], handle);
 499                 if (ACPI_SUCCESS(status)) {
 500                         *path = paths[i];
 501                         dbg_printk(TPACPI_DBG_INIT,
 502                                    "Found ACPI handle %s for %s\n",
 503                                    *path, name);
 504                         return;
 505                 }
 506         }
 507
 508         vdbg_printk(TPACPI_DBG_INIT, "ACPI handle for %s not found\n",
 509                     name);
 510         *handle = NULL;
 511 }
 512
 513 static void dispatch_acpi_notify(acpi_handle handle, u32 event, void *data)
 514 {
 515         struct ibm_struct *ibm = data;
 516
 517         if (tpacpi_lifecycle != TPACPI_LIFE_RUNNING)
 518                 return;
 519
 520         if (!ibm || !ibm->acpi || !ibm->acpi->notify)
 521                 return;
 522
 523         ibm->acpi->notify(ibm, event);
 524 }
 525
 526 static int __init setup_acpi_notify(struct ibm_struct *ibm)
 527 {
 528         acpi_status status;
 529         int rc;
 530
 531         BUG_ON(!ibm->acpi);
 532
 533         if (!*ibm->acpi->handle)
 534                 return 0;
 535
 536         vdbg_printk(TPACPI_DBG_INIT,
 537                 "setting up ACPI notify for %s\n", ibm->name);
 538
 539         rc = acpi_bus_get_device(*ibm->acpi->handle, &ibm->acpi->device);
 540         if (rc < 0) {
 541                 printk(TPACPI_ERR "acpi_bus_get_device(%s) failed: %d\n",
 542                         ibm->name, rc);
 543                 return -ENODEV;
 544         }
 545
 546         ibm->acpi->device->driver_data = ibm;
 547         sprintf(acpi_device_class(ibm->acpi->device), "%s/%s",
 548                 TPACPI_ACPI_EVENT_PREFIX,
 549                 ibm->name);
 550
 551         status = acpi_install_notify_handler(*ibm->acpi->handle,
 552                         ibm->acpi->type, dispatch_acpi_notify, ibm);
 553         if (ACPI_FAILURE(status)) {
 554                 if (status == AE_ALREADY_EXISTS) {
 555                         printk(TPACPI_NOTICE
 556                                "another device driver is already "
 557                                "handling %s events\n", ibm->name);
 558                 } else {
 559                         printk(TPACPI_ERR
 560                                "acpi_install_notify_handler(%s) failed: %d\n",
 561                                ibm->name, status);
 562                 }
 563                 return -ENODEV;
 564         }
 565         ibm->flags.acpi_notify_installed = 1;
 566         return 0;
 567 }
 568
 569 static int __init tpacpi_device_add(struct acpi_device *device)
 570 {
 571         return 0;
 572 }
 573
 574 static int __init register_tpacpi_subdriver(struct ibm_struct *ibm)
 575 {
 576         int rc;
 577
 578         dbg_printk(TPACPI_DBG_INIT,
 579                 "registering %s as an ACPI driver\n", ibm->name);
 580
 581         BUG_ON(!ibm->acpi);
 582
 583         ibm->acpi->driver = kzalloc(sizeof(struct acpi_driver), GFP_KERNEL);
 584         if (!ibm->acpi->driver) {
 585                 printk(TPACPI_ERR "kzalloc(ibm->driver) failed\n");
 586                 return -ENOMEM;
 587         }
 588
 589         sprintf(ibm->acpi->driver->name, "%s_%s", TPACPI_NAME, ibm->name);
 590         ibm->acpi->driver->ids = ibm->acpi->hid;
 591
 592         ibm->acpi->driver->ops.add = &tpacpi_device_add;
 593
 594         rc = acpi_bus_register_driver(ibm->acpi->driver);
 595         if (rc < 0) {
 596                 printk(TPACPI_ERR "acpi_bus_register_driver(%s) failed: %d\n",
 597                        ibm->name, rc);
 598                 kfree(ibm->acpi->driver);
 599                 ibm->acpi->driver = NULL;
 600         } else if (!rc)
 601                 ibm->flags.acpi_driver_registered = 1;
 602
 603         return rc;
 604 }
 605
 606
 607 /****************************************************************************
 608  ****************************************************************************
 609  *
 610  * Procfs Helpers
 611  *
 612  ****************************************************************************
 613  ****************************************************************************/
 614
 615 static int dispatch_procfs_read(char *page, char **start, off_t off,
 616                         int count, int *eof, void *data)
 617 {
 618         struct ibm_struct *ibm = data;
 619         int len;
 620
 621         if (!ibm || !ibm->read)
 622                 return -EINVAL;
 623
 624         len = ibm->read(page);
 625         if (len < 0)
 626                 return len;
 627
 628         if (len <= off + count)
 629                 *eof = 1;
 630         *start = page + off;
 631         len -= off;
 632         if (len > count)
 633                 len = count;
 634         if (len < 0)
 635                 len = 0;
 636
 637         return len;
 638 }
 639
 640 static int dispatch_procfs_write(struct file *file,
 641                         const char __user *userbuf,
 642                         unsigned long count, void *data)
 643 {
 644         struct ibm_struct *ibm = data;
 645         char *kernbuf;
 646         int ret;
 647
 648         if (!ibm || !ibm->write)
 649                 return -EINVAL;
 650
 651         kernbuf = kmalloc(count + 2, GFP_KERNEL);
 652         if (!kernbuf)
 653                 return -ENOMEM;
 654
 655         if (copy_from_user(kernbuf, userbuf, count)) {
 656                 kfree(kernbuf);
 657                 return -EFAULT;
 658         }
 659
 660         kernbuf[count] = 0;
 661         strcat(kernbuf, ",");
 662         ret = ibm->write(kernbuf);
 663         if (ret == 0)
 664                 ret = count;
 665
 666         kfree(kernbuf);
 667
 668         return ret;
 669 }
 670
 671 static char *next_cmd(char **cmds)
 672 {
 673         char *start = *cmds;
 674         char *end;
 675
 676         while ((end = strchr(start, ',')) && end == start)
 677                 start = end + 1;
 678
 679         if (!end)
 680                 return NULL;
 681
 682         *end = 0;
 683         *cmds = end + 1;
 684         return start;
 685 }
 686
 687
 688 /****************************************************************************
 689  ****************************************************************************
 690  *
 691  * Device model: input, hwmon and platform
 692  *
 693  ****************************************************************************
 694  ****************************************************************************/
 695
 696 static struct platform_device *tpacpi_pdev;
 697 static struct platform_device *tpacpi_sensors_pdev;
 698 static struct device *tpacpi_hwmon;
 699 static struct input_dev *tpacpi_inputdev;
 700 static struct mutex tpacpi_inputdev_send_mutex;
 701 static LIST_HEAD(tpacpi_all_drivers);
 702
 703 static int tpacpi_suspend_handler(struct platform_device *pdev,
 704                                   pm_message_t state)
 705 {
 706         struct ibm_struct *ibm, *itmp;
 707
 708         list_for_each_entry_safe(ibm, itmp,
 709                                  &tpacpi_all_drivers,
 710                                  all_drivers) {
 711                 if (ibm->suspend)
 712                         (ibm->suspend)(state);
 713         }
 714
 715         return 0;
 716 }
 717
 718 static int tpacpi_resume_handler(struct platform_device *pdev)
 719 {
 720         struct ibm_struct *ibm, *itmp;
 721
 722         list_for_each_entry_safe(ibm, itmp,
 723                                  &tpacpi_all_drivers,
 724                                  all_drivers) {
 725                 if (ibm->resume)
 726                         (ibm->resume)();
 727         }
 728
 729         return 0;
 730 }
 731
 732 static struct platform_driver tpacpi_pdriver = {
 733         .driver = {
 734                 .name = TPACPI_DRVR_NAME,
 735                 .owner = THIS_MODULE,
 736         },
 737         .suspend = tpacpi_suspend_handler,
 738         .resume = tpacpi_resume_handler,
 739 };
 740
 741 static struct platform_driver tpacpi_hwmon_pdriver = {
 742         .driver = {
 743                 .name = TPACPI_HWMON_DRVR_NAME,
 744                 .owner = THIS_MODULE,
 745         },
 746 };
 747
 748 /*************************************************************************
 749  * sysfs support helpers
 750  */
 751
 752 struct attribute_set {
 753         unsigned int members, max_members;
 754         struct attribute_group group;
 755 };
 756
 757 struct attribute_set_obj {
 758         struct attribute_set s;
 759         struct attribute *a;
 760 } __attribute__((packed));
 761
 762 static struct attribute_set *create_attr_set(unsigned int max_members,
 763                                                 const char *name)
 764 {
 765         struct attribute_set_obj *sobj;
 766
 767         if (max_members == 0)
 768                 return NULL;
 769
 770         /* Allocates space for implicit NULL at the end too */
 771         sobj = kzalloc(sizeof(struct attribute_set_obj) +
 772                     max_members * sizeof(struct attribute *),
 773                     GFP_KERNEL);
 774         if (!sobj)
 775                 return NULL;
 776         sobj->s.max_members = max_members;
 777         sobj->s.group.attrs = &sobj->a;
 778         sobj->s.group.name = name;
 779
 780         return &sobj->s;
 781 }
 782
 783 #define destroy_attr_set(_set) \
 784         kfree(_set);
 785
 786 /* not multi-threaded safe, use it in a single thread per set */
 787 static int add_to_attr_set(struct attribute_set *s, struct attribute *attr)
 788 {
 789         if (!s || !attr)
 790                 return -EINVAL;
 791
 792         if (s->members >= s->max_members)
 793                 return -ENOMEM;
 794
 795         s->group.attrs[s->members] = attr;
 796         s->members++;
 797
 798         return 0;
 799 }
 800
 801 static int add_many_to_attr_set(struct attribute_set *s,
 802                         struct attribute **attr,
 803                         unsigned int count)
 804 {
 805         int i, res;
 806
 807         for (i = 0; i < count; i++) {
 808                 res = add_to_attr_set(s, attr[i]);
 809                 if (res)
 810                         return res;
 811         }
 812
 813         return 0;
 814 }
 815
 816 static void delete_attr_set(struct attribute_set *s, struct kobject *kobj)
 817 {
 818         sysfs_remove_group(kobj, &s->group);
 819         destroy_attr_set(s);
 820 }
 821
 822 #define register_attr_set_with_sysfs(_attr_set, _kobj) \
 823         sysfs_create_group(_kobj, &_attr_set->group)
 824
 825 static int parse_strtoul(const char *buf,
 826                 unsigned long max, unsigned long *value)
 827 {
 828         char *endp;
 829
 830         while (*buf && isspace(*buf))
 831                 buf++;
 832         *value = simple_strtoul(buf, &endp, 0);
 833         while (*endp && isspace(*endp))
 834                 endp++;
 835         if (*endp || *value > max)
 836                 return -EINVAL;
 837
 838         return 0;
 839 }
 840
 841 static int __init tpacpi_query_bcl_levels(acpi_handle handle)
 842 {
 843         struct acpi_buffer buffer = { ACPI_ALLOCATE_BUFFER, NULL };
 844         union acpi_object *obj;
 845         int rc;
 846
 847         if (ACPI_SUCCESS(acpi_evaluate_object(handle, NULL, NULL, &buffer))) {
 848                 obj = (union acpi_object *)buffer.pointer;
 849                 if (!obj || (obj->type != ACPI_TYPE_PACKAGE)) {
 850                         printk(TPACPI_ERR "Unknown _BCL data, "
 851                                "please report this to %s\n", TPACPI_MAIL);
 852                         rc = 0;
 853                 } else {
 854                         rc = obj->package.count;
 855                 }
 856         } else {
 857                 return 0;
 858         }
 859
 860         kfree(buffer.pointer);
 861         return rc;
 862 }
 863
 864 static acpi_status __init tpacpi_acpi_walk_find_bcl(acpi_handle handle,
 865                                         u32 lvl, void *context, void **rv)
 866 {
 867         char name[ACPI_PATH_SEGMENT_LENGTH];
 868         struct acpi_buffer buffer = { sizeof(name), &name };
 869
 870         if (ACPI_SUCCESS(acpi_get_name(handle, ACPI_SINGLE_NAME, &buffer)) &&
 871             !strncmp("_BCL", name, sizeof(name) - 1)) {
 872                 BUG_ON(!rv || !*rv);
 873                 **(int **)rv = tpacpi_query_bcl_levels(handle);
 874                 return AE_CTRL_TERMINATE;
 875         } else {
 876                 return AE_OK;
 877         }
 878 }
 879
 880 /*
 881  * Returns 0 (no ACPI _BCL or _BCL invalid), or size of brightness map
 882  */
 883 static int __init tpacpi_check_std_acpi_brightness_support(void)
 884 {
 885         int status;
 886         int bcl_levels = 0;
 887         void *bcl_ptr = &bcl_levels;
 888
 889         if (!vid_handle) {
 890                 TPACPI_ACPIHANDLE_INIT(vid);
 891         }
 892         if (!vid_handle)
 893                 return 0;
 894
 895         /*
 896          * Search for a _BCL method, and execute it.  This is safe on all
 897          * ThinkPads, and as a side-effect, _BCL will place a Lenovo Vista
 898          * BIOS in ACPI backlight control mode.  We do NOT have to care
 899          * about calling the _BCL method in an enabled video device, any
 900          * will do for our purposes.
 901          */
 902
 903         status = acpi_walk_namespace(ACPI_TYPE_METHOD, vid_handle, 3,
 904                                      tpacpi_acpi_walk_find_bcl, NULL,
 905                                      &bcl_ptr);
 906
 907         if (ACPI_SUCCESS(status) && bcl_levels > 2) {
 908                 tp_features.bright_acpimode = 1;
 909                 return (bcl_levels - 2);
 910         }
 911
 912         return 0;
 913 }
 914
 915 static int __init tpacpi_new_rfkill(const unsigned int id,
 916                         struct rfkill **rfk,
 917                         const enum rfkill_type rfktype,
 918                         const char *name,
 919                         int (*toggle_radio)(void *, enum rfkill_state),
 920                         int (*get_state)(void *, enum rfkill_state *))
 921 {
 922         int res;
 923         enum rfkill_state initial_state;
 924
 925         *rfk = rfkill_allocate(&tpacpi_pdev->dev, rfktype);
 926         if (!*rfk) {
 927                 printk(TPACPI_ERR
 928                         "failed to allocate memory for rfkill class\n");
 929                 return -ENOMEM;
 930         }
 931
 932         (*rfk)->name = name;
 933         (*rfk)->get_state = get_state;
 934         (*rfk)->toggle_radio = toggle_radio;
 935
 936         if (!get_state(NULL, &initial_state))
 937                 (*rfk)->state = initial_state;
 938
 939         res = rfkill_register(*rfk);
 940         if (res < 0) {
 941                 printk(TPACPI_ERR
 942                         "failed to register %s rfkill switch: %d\n",
 943                         name, res);
 944                 rfkill_free(*rfk);
 945                 *rfk = NULL;
 946                 return res;
 947         }
 948
 949         return 0;
 950 }
 951
 952 /*************************************************************************
 953  * thinkpad-acpi driver attributes
 954  */
 955
 956 /* interface_version --------------------------------------------------- */
 957 static ssize_t tpacpi_driver_interface_version_show(
 958                                 struct device_driver *drv,
 959                                 char *buf)
 960 {
 961         return snprintf(buf, PAGE_SIZE, "0x%08x\n", TPACPI_SYSFS_VERSION);
 962 }
 963
 964 static DRIVER_ATTR(interface_version, S_IRUGO,
 965                 tpacpi_driver_interface_version_show, NULL);
 966
 967 /* debug_level --------------------------------------------------------- */
 968 static ssize_t tpacpi_driver_debug_show(struct device_driver *drv,
 969                                                 char *buf)
 970 {
 971         return snprintf(buf, PAGE_SIZE, "0x%04x\n", dbg_level);
 972 }
 973
 974 static ssize_t tpacpi_driver_debug_store(struct device_driver *drv,
 975                                                 const char *buf, size_t count)
 976 {
 977         unsigned long t;
 978
 979         if (parse_strtoul(buf, 0xffff, &t))
 980                 return -EINVAL;
 981
 982         dbg_level = t;
 983
 984         return count;
 985 }
 986
 987 static DRIVER_ATTR(debug_level, S_IWUSR | S_IRUGO,
 988                 tpacpi_driver_debug_show, tpacpi_driver_debug_store);
 989
 990 /* version ------------------------------------------------------------- */
 991 static ssize_t tpacpi_driver_version_show(struct device_driver *drv,
 992                                                 char *buf)
 993 {
 994         return snprintf(buf, PAGE_SIZE, "%s v%s\n",
 995                         TPACPI_DESC, TPACPI_VERSION);
 996 }
 997
 998 static DRIVER_ATTR(version, S_IRUGO,
 999                 tpacpi_driver_version_show, NULL);
1000
1001 /* --------------------------------------------------------------------- */
1002
1003 static struct driver_attribute *tpacpi_driver_attributes[] = {
1004         &driver_attr_debug_level, &driver_attr_version,
1005         &driver_attr_interface_version,
1006 };
1007
1008 static int __init tpacpi_create_driver_attributes(struct device_driver *drv)
1009 {
1010         int i, res;
1011
1012         i = 0;
1013         res = 0;
1014         while (!res && i < ARRAY_SIZE(tpacpi_driver_attributes)) {
1015                 res = driver_create_file(drv, tpacpi_driver_attributes[i]);
1016                 i++;
1017         }
1018
1019         return res;
1020 }
1021
1022 static void tpacpi_remove_driver_attributes(struct device_driver *drv)
1023 {
1024         int i;
1025
1026         for (i = 0; i < ARRAY_SIZE(tpacpi_driver_attributes); i++)
1027                 driver_remove_file(drv, tpacpi_driver_attributes[i]);
1028 }
1029
1030 /****************************************************************************
1031  ****************************************************************************
1032  *
1033  * Subdrivers
1034  *
1035  ****************************************************************************
1036  ****************************************************************************/
1037
1038 /*************************************************************************
1039  * thinkpad-acpi init subdriver
1040  */
1041
1042 static int __init thinkpad_acpi_driver_init(struct ibm_init_struct *iibm)
1043 {
1044         printk(TPACPI_INFO "%s v%s\n", TPACPI_DESC, TPACPI_VERSION);
1045         printk(TPACPI_INFO "%s\n", TPACPI_URL);
1046
1047         printk(TPACPI_INFO "ThinkPad BIOS %s, EC %s\n",
1048                 (thinkpad_id.bios_version_str) ?
1049                         thinkpad_id.bios_version_str : "unknown",
1050                 (thinkpad_id.ec_version_str) ?
1051                         thinkpad_id.ec_version_str : "unknown");
1052
1053         if (thinkpad_id.vendor && thinkpad_id.model_str)
1054                 printk(TPACPI_INFO "%s %s, model %s\n",
1055                         (thinkpad_id.vendor == PCI_VENDOR_ID_IBM) ?
1056                                 "IBM" : ((thinkpad_id.vendor ==
1057                                                 PCI_VENDOR_ID_LENOVO) ?
1058                                         "Lenovo" : "Unknown vendor"),
1059                         thinkpad_id.model_str,
1060                         (thinkpad_id.nummodel_str) ?
1061                                 thinkpad_id.nummodel_str : "unknown");
1062
1063         return 0;
1064 }
1065
1066 static int thinkpad_acpi_driver_read(char *p)
1067 {
1068         int len = 0;
1069
1070         len += sprintf(p + len, "driver:\t\t%s\n", TPACPI_DESC);
1071         len += sprintf(p + len, "version:\t%s\n", TPACPI_VERSION);
1072
1073         return len;
1074 }
1075
1076 static struct ibm_struct thinkpad_acpi_driver_data = {
1077         .name = "driver",
1078         .read = thinkpad_acpi_driver_read,
1079 };
1080
1081 /*************************************************************************
1082  * Hotkey subdriver
1083  */
1084
1085 enum {  /* hot key scan codes (derived from ACPI DSDT) */
1086         TP_ACPI_HOTKEYSCAN_FNF1         = 0,
1087         TP_ACPI_HOTKEYSCAN_FNF2,
1088         TP_ACPI_HOTKEYSCAN_FNF3,
1089         TP_ACPI_HOTKEYSCAN_FNF4,
1090         TP_ACPI_HOTKEYSCAN_FNF5,
1091         TP_ACPI_HOTKEYSCAN_FNF6,
1092         TP_ACPI_HOTKEYSCAN_FNF7,
1093         TP_ACPI_HOTKEYSCAN_FNF8,
1094         TP_ACPI_HOTKEYSCAN_FNF9,
1095         TP_ACPI_HOTKEYSCAN_FNF10,
1096         TP_ACPI_HOTKEYSCAN_FNF11,
1097         TP_ACPI_HOTKEYSCAN_FNF12,
1098         TP_ACPI_HOTKEYSCAN_FNBACKSPACE,
1099         TP_ACPI_HOTKEYSCAN_FNINSERT,
1100         TP_ACPI_HOTKEYSCAN_FNDELETE,
1101         TP_ACPI_HOTKEYSCAN_FNHOME,
1102         TP_ACPI_HOTKEYSCAN_FNEND,
1103         TP_ACPI_HOTKEYSCAN_FNPAGEUP,
1104         TP_ACPI_HOTKEYSCAN_FNPAGEDOWN,
1105         TP_ACPI_HOTKEYSCAN_FNSPACE,
1106         TP_ACPI_HOTKEYSCAN_VOLUMEUP,
1107         TP_ACPI_HOTKEYSCAN_VOLUMEDOWN,
1108         TP_ACPI_HOTKEYSCAN_MUTE,
1109         TP_ACPI_HOTKEYSCAN_THINKPAD,
1110 };
1111
1112 enum {  /* Keys available through NVRAM polling */
1113         TPACPI_HKEY_NVRAM_KNOWN_MASK = 0x00fb88c0U,
1114         TPACPI_HKEY_NVRAM_GOOD_MASK  = 0x00fb8000U,
1115 };
1116
1117 enum {  /* Positions of some of the keys in hotkey masks */
1118         TP_ACPI_HKEY_DISPSWTCH_MASK     = 1 << TP_ACPI_HOTKEYSCAN_FNF7,
1119         TP_ACPI_HKEY_DISPXPAND_MASK     = 1 << TP_ACPI_HOTKEYSCAN_FNF8,
1120         TP_ACPI_HKEY_HIBERNATE_MASK     = 1 << TP_ACPI_HOTKEYSCAN_FNF12,
1121         TP_ACPI_HKEY_BRGHTUP_MASK       = 1 << TP_ACPI_HOTKEYSCAN_FNHOME,
1122         TP_ACPI_HKEY_BRGHTDWN_MASK      = 1 << TP_ACPI_HOTKEYSCAN_FNEND,
1123         TP_ACPI_HKEY_THNKLGHT_MASK      = 1 << TP_ACPI_HOTKEYSCAN_FNPAGEUP,
1124         TP_ACPI_HKEY_ZOOM_MASK          = 1 << TP_ACPI_HOTKEYSCAN_FNSPACE,
1125         TP_ACPI_HKEY_VOLUP_MASK         = 1 << TP_ACPI_HOTKEYSCAN_VOLUMEUP,
1126         TP_ACPI_HKEY_VOLDWN_MASK        = 1 << TP_ACPI_HOTKEYSCAN_VOLUMEDOWN,
1127         TP_ACPI_HKEY_MUTE_MASK          = 1 << TP_ACPI_HOTKEYSCAN_MUTE,
1128         TP_ACPI_HKEY_THINKPAD_MASK      = 1 << TP_ACPI_HOTKEYSCAN_THINKPAD,
1129 };
1130
1131 enum {  /* NVRAM to ACPI HKEY group map */
1132         TP_NVRAM_HKEY_GROUP_HK2         = TP_ACPI_HKEY_THINKPAD_MASK |
1133                                           TP_ACPI_HKEY_ZOOM_MASK |
1134                                           TP_ACPI_HKEY_DISPSWTCH_MASK |
1135                                           TP_ACPI_HKEY_HIBERNATE_MASK,
1136         TP_NVRAM_HKEY_GROUP_BRIGHTNESS  = TP_ACPI_HKEY_BRGHTUP_MASK |
1137                                           TP_ACPI_HKEY_BRGHTDWN_MASK,
1138         TP_NVRAM_HKEY_GROUP_VOLUME      = TP_ACPI_HKEY_VOLUP_MASK |
1139                                           TP_ACPI_HKEY_VOLDWN_MASK |
1140                                           TP_ACPI_HKEY_MUTE_MASK,
1141 };
1142
1143 #ifdef CONFIG_THINKPAD_ACPI_HOTKEY_POLL
1144 struct tp_nvram_state {
1145        u16 thinkpad_toggle:1;
1146        u16 zoom_toggle:1;
1147        u16 display_toggle:1;
1148        u16 thinklight_toggle:1;
1149        u16 hibernate_toggle:1;
1150        u16 displayexp_toggle:1;
1151        u16 display_state:1;
1152        u16 brightness_toggle:1;
1153        u16 volume_toggle:1;
1154        u16 mute:1;
1155
1156        u8 brightness_level;
1157        u8 volume_level;
1158 };
1159
1160 static struct task_struct *tpacpi_hotkey_task;
1161 static u32 hotkey_source_mask;          /* bit mask 0=ACPI,1=NVRAM */
1162 static int hotkey_poll_freq = 10;       /* Hz */
1163 static struct mutex hotkey_thread_mutex;
1164 static struct mutex hotkey_thread_data_mutex;
1165 static unsigned int hotkey_config_change;
1166
1167 #else /* CONFIG_THINKPAD_ACPI_HOTKEY_POLL */
1168
1169 #define hotkey_source_mask 0U
1170
1171 #endif /* CONFIG_THINKPAD_ACPI_HOTKEY_POLL */
1172
1173 static struct mutex hotkey_mutex;
1174
1175 static enum {   /* Reasons for waking up */
1176         TP_ACPI_WAKEUP_NONE = 0,        /* None or unknown */
1177         TP_ACPI_WAKEUP_BAYEJ,           /* Bay ejection request */
1178         TP_ACPI_WAKEUP_UNDOCK,          /* Undock request */
1179 } hotkey_wakeup_reason;
1180
1181 static int hotkey_autosleep_ack;
1182
1183 static int hotkey_orig_status;
1184 static u32 hotkey_orig_mask;
1185 static u32 hotkey_all_mask;
1186 static u32 hotkey_reserved_mask;
1187 static u32 hotkey_mask;
1188
1189 static unsigned int hotkey_report_mode;
1190
1191 static u16 *hotkey_keycode_map;
1192
1193 static struct attribute_set *hotkey_dev_attributes;
1194
1195 #ifdef CONFIG_THINKPAD_ACPI_HOTKEY_POLL
1196 #define HOTKEY_CONFIG_CRITICAL_START \
1197         do { \
1198                 mutex_lock(&hotkey_thread_data_mutex); \
1199                 hotkey_config_change++; \
1200         } while (0);
1201 #define HOTKEY_CONFIG_CRITICAL_END \
1202         mutex_unlock(&hotkey_thread_data_mutex);
1203 #else
1204 #define HOTKEY_CONFIG_CRITICAL_START
1205 #define HOTKEY_CONFIG_CRITICAL_END
1206 #endif /* CONFIG_THINKPAD_ACPI_HOTKEY_POLL */
1207
1208 /* HKEY.MHKG() return bits */
1209 #define TP_HOTKEY_TABLET_MASK (1 << 3)
1210
1211 static int hotkey_get_wlsw(int *status)
1212 {
1213         if (!acpi_evalf(hkey_handle, status, "WLSW", "d"))
1214                 return -EIO;
1215         return 0;
1216 }
1217
1218 static int hotkey_get_tablet_mode(int *status)
1219 {
1220         int s;
1221
1222         if (!acpi_evalf(hkey_handle, &s, "MHKG", "d"))
1223                 return -EIO;
1224
1225         *status = ((s & TP_HOTKEY_TABLET_MASK) != 0);
1226         return 0;
1227 }
1228
1229 /*
1230  * Call with hotkey_mutex held
1231  */
1232 static int hotkey_mask_get(void)
1233 {
1234         u32 m = 0;
1235
1236         if (tp_features.hotkey_mask) {
1237                 if (!acpi_evalf(hkey_handle, &m, "DHKN", "d"))
1238                         return -EIO;
1239         }
1240         hotkey_mask = m | (hotkey_source_mask & hotkey_mask);
1241
1242         return 0;
1243 }
1244
1245 /*
1246  * Call with hotkey_mutex held
1247  */
1248 static int hotkey_mask_set(u32 mask)
1249 {
1250         int i;
1251         int rc = 0;
1252
1253         if (tp_features.hotkey_mask) {
1254                 if (!tp_warned.hotkey_mask_ff &&
1255                     (mask == 0xffff || mask == 0xffffff ||
1256                      mask == 0xffffffff)) {
1257                         tp_warned.hotkey_mask_ff = 1;
1258                         printk(TPACPI_NOTICE
1259                                "setting the hotkey mask to 0x%08x is likely "
1260                                "not the best way to go about it\n", mask);
1261                         printk(TPACPI_NOTICE
1262                                "please consider using the driver defaults, "
1263                                "and refer to up-to-date thinkpad-acpi "
1264                                "documentation\n");
1265                 }
1266
1267                 HOTKEY_CONFIG_CRITICAL_START
1268                 for (i = 0; i < 32; i++) {
1269                         u32 m = 1 << i;
1270                         /* enable in firmware mask only keys not in NVRAM
1271                          * mode, but enable the key in the cached hotkey_mask
1272                          * regardless of mode, or the key will end up
1273                          * disabled by hotkey_mask_get() */
1274                         if (!acpi_evalf(hkey_handle,
1275                                         NULL, "MHKM", "vdd", i + 1,
1276                                         !!((mask & ~hotkey_source_mask) & m))) {
1277                                 rc = -EIO;
1278                                 break;
1279                         } else {
1280                                 hotkey_mask = (hotkey_mask & ~m) | (mask & m);
1281                         }
1282                 }
1283                 HOTKEY_CONFIG_CRITICAL_END
1284
1285                 /* hotkey_mask_get must be called unconditionally below */
1286                 if (!hotkey_mask_get() && !rc &&
1287                     (hotkey_mask & ~hotkey_source_mask) !=
1288                      (mask & ~hotkey_source_mask)) {
1289                         printk(TPACPI_NOTICE
1290                                "requested hot key mask 0x%08x, but "
1291                                "firmware forced it to 0x%08x\n",
1292                                mask, hotkey_mask);
1293                 }
1294         } else {
1295 #ifdef CONFIG_THINKPAD_ACPI_HOTKEY_POLL
1296                 HOTKEY_CONFIG_CRITICAL_START
1297                 hotkey_mask = mask & hotkey_source_mask;
1298                 HOTKEY_CONFIG_CRITICAL_END
1299                 hotkey_mask_get();
1300                 if (hotkey_mask != mask) {
1301                         printk(TPACPI_NOTICE
1302                                "requested hot key mask 0x%08x, "
1303                                "forced to 0x%08x (NVRAM poll mask is "
1304                                "0x%08x): no firmware mask support\n",
1305                                mask, hotkey_mask, hotkey_source_mask);
1306                 }
1307 #else
1308                 hotkey_mask_get();
1309                 rc = -ENXIO;
1310 #endif /* CONFIG_THINKPAD_ACPI_HOTKEY_POLL */
1311         }
1312
1313         return rc;
1314 }
1315
1316 static int hotkey_status_get(int *status)
1317 {
1318         if (!acpi_evalf(hkey_handle, status, "DHKC", "d"))
1319                 return -EIO;
1320
1321         return 0;
1322 }
1323
1324 static int hotkey_status_set(int status)
1325 {
1326         if (!acpi_evalf(hkey_handle, NULL, "MHKC", "vd", status))
1327                 return -EIO;
1328
1329         return 0;
1330 }
1331
1332 static void tpacpi_input_send_tabletsw(void)
1333 {
1334         int state;
1335
1336         if (tp_features.hotkey_tablet &&
1337             !hotkey_get_tablet_mode(&state)) {
1338                 mutex_lock(&tpacpi_inputdev_send_mutex);
1339
1340                 input_report_switch(tpacpi_inputdev,
1341                                     SW_TABLET_MODE, !!state);
1342                 input_sync(tpacpi_inputdev);
1343
1344                 mutex_unlock(&tpacpi_inputdev_send_mutex);
1345         }
1346 }
1347
1348 static void tpacpi_input_send_key(unsigned int scancode)
1349 {
1350         unsigned int keycode;
1351
1352         keycode = hotkey_keycode_map[scancode];
1353
1354         if (keycode != KEY_RESERVED) {
1355                 mutex_lock(&tpacpi_inputdev_send_mutex);
1356
1357                 input_report_key(tpacpi_inputdev, keycode, 1);
1358                 if (keycode == KEY_UNKNOWN)
1359                         input_event(tpacpi_inputdev, EV_MSC, MSC_SCAN,
1360                                     scancode);
1361                 input_sync(tpacpi_inputdev);
1362
1363                 input_report_key(tpacpi_inputdev, keycode, 0);
1364                 if (keycode == KEY_UNKNOWN)
1365                         input_event(tpacpi_inputdev, EV_MSC, MSC_SCAN,
1366                                     scancode);
1367                 input_sync(tpacpi_inputdev);
1368
1369                 mutex_unlock(&tpacpi_inputdev_send_mutex);
1370         }
1371 }
1372
1373 #ifdef CONFIG_THINKPAD_ACPI_HOTKEY_POLL
1374 static struct tp_acpi_drv_struct ibm_hotkey_acpidriver;
1375
1376 static void tpacpi_hotkey_send_key(unsigned int scancode)
1377 {
1378         tpacpi_input_send_key(scancode);
1379         if (hotkey_report_mode < 2) {
1380                 acpi_bus_generate_proc_event(ibm_hotkey_acpidriver.device,
1381                                                 0x80, 0x1001 + scancode);
1382         }
1383 }
1384
1385 static void hotkey_read_nvram(struct tp_nvram_state *n, u32 m)
1386 {
1387         u8 d;
1388
1389         if (m & TP_NVRAM_HKEY_GROUP_HK2) {
1390                 d = nvram_read_byte(TP_NVRAM_ADDR_HK2);
1391                 n->thinkpad_toggle = !!(d & TP_NVRAM_MASK_HKT_THINKPAD);
1392                 n->zoom_toggle = !!(d & TP_NVRAM_MASK_HKT_ZOOM);
1393                 n->display_toggle = !!(d & TP_NVRAM_MASK_HKT_DISPLAY);
1394                 n->hibernate_toggle = !!(d & TP_NVRAM_MASK_HKT_HIBERNATE);
1395         }
1396         if (m & TP_ACPI_HKEY_THNKLGHT_MASK) {
1397                 d = nvram_read_byte(TP_NVRAM_ADDR_THINKLIGHT);
1398                 n->thinklight_toggle = !!(d & TP_NVRAM_MASK_THINKLIGHT);
1399         }
1400         if (m & TP_ACPI_HKEY_DISPXPAND_MASK) {
1401                 d = nvram_read_byte(TP_NVRAM_ADDR_VIDEO);
1402                 n->displayexp_toggle =
1403                                 !!(d & TP_NVRAM_MASK_HKT_DISPEXPND);
1404         }
1405         if (m & TP_NVRAM_HKEY_GROUP_BRIGHTNESS) {
1406                 d = nvram_read_byte(TP_NVRAM_ADDR_BRIGHTNESS);
1407                 n->brightness_level = (d & TP_NVRAM_MASK_LEVEL_BRIGHTNESS)
1408                                 >> TP_NVRAM_POS_LEVEL_BRIGHTNESS;
1409                 n->brightness_toggle =
1410                                 !!(d & TP_NVRAM_MASK_HKT_BRIGHTNESS);
1411         }
1412         if (m & TP_NVRAM_HKEY_GROUP_VOLUME) {
1413                 d = nvram_read_byte(TP_NVRAM_ADDR_MIXER);
1414                 n->volume_level = (d & TP_NVRAM_MASK_LEVEL_VOLUME)
1415                                 >> TP_NVRAM_POS_LEVEL_VOLUME;
1416                 n->mute = !!(d & TP_NVRAM_MASK_MUTE);
1417                 n->volume_toggle = !!(d & TP_NVRAM_MASK_HKT_VOLUME);
1418         }
1419 }
1420
1421 #define TPACPI_COMPARE_KEY(__scancode, __member) \
1422         do { \
1423                 if ((mask & (1 << __scancode)) && \
1424                     oldn->__member != newn->__member) \
1425                 tpacpi_hotkey_send_key(__scancode); \
1426         } while (0)
1427
1428 #define TPACPI_MAY_SEND_KEY(__scancode) \
1429         do { if (mask & (1 << __scancode)) \
1430                 tpacpi_hotkey_send_key(__scancode); } while (0)
1431
1432 static void hotkey_compare_and_issue_event(struct tp_nvram_state *oldn,
1433                                            struct tp_nvram_state *newn,
1434                                            u32 mask)
1435 {
1436         TPACPI_COMPARE_KEY(TP_ACPI_HOTKEYSCAN_THINKPAD, thinkpad_toggle);
1437         TPACPI_COMPARE_KEY(TP_ACPI_HOTKEYSCAN_FNSPACE, zoom_toggle);
1438         TPACPI_COMPARE_KEY(TP_ACPI_HOTKEYSCAN_FNF7, display_toggle);
1439         TPACPI_COMPARE_KEY(TP_ACPI_HOTKEYSCAN_FNF12, hibernate_toggle);
1440
1441         TPACPI_COMPARE_KEY(TP_ACPI_HOTKEYSCAN_FNPAGEUP, thinklight_toggle);
1442
1443         TPACPI_COMPARE_KEY(TP_ACPI_HOTKEYSCAN_FNF8, displayexp_toggle);
1444
1445         /* handle volume */
1446         if (oldn->volume_toggle != newn->volume_toggle) {
1447                 if (oldn->mute != newn->mute) {
1448                         TPACPI_MAY_SEND_KEY(TP_ACPI_HOTKEYSCAN_MUTE);
1449                 }
1450                 if (oldn->volume_level > newn->volume_level) {
1451                         TPACPI_MAY_SEND_KEY(TP_ACPI_HOTKEYSCAN_VOLUMEDOWN);
1452                 } else if (oldn->volume_level < newn->volume_level) {
1453                         TPACPI_MAY_SEND_KEY(TP_ACPI_HOTKEYSCAN_VOLUMEUP);
1454                 } else if (oldn->mute == newn->mute) {
1455                         /* repeated key presses that didn't change state */
1456                         if (newn->mute) {
1457                                 TPACPI_MAY_SEND_KEY(TP_ACPI_HOTKEYSCAN_MUTE);
1458                         } else if (newn->volume_level != 0) {
1459                                 TPACPI_MAY_SEND_KEY(TP_ACPI_HOTKEYSCAN_VOLUMEUP);
1460                         } else {
1461                                 TPACPI_MAY_SEND_KEY(TP_ACPI_HOTKEYSCAN_VOLUMEDOWN);
1462                         }
1463                 }
1464         }
1465
1466         /* handle brightness */
1467         if (oldn->brightness_toggle != newn->brightness_toggle) {
1468                 if (oldn->brightness_level < newn->brightness_level) {
1469                         TPACPI_MAY_SEND_KEY(TP_ACPI_HOTKEYSCAN_FNHOME);
1470                 } else if (oldn->brightness_level > newn->brightness_level) {
1471                         TPACPI_MAY_SEND_KEY(TP_ACPI_HOTKEYSCAN_FNEND);
1472                 } else {
1473                         /* repeated key presses that didn't change state */
1474                         if (newn->brightness_level != 0) {
1475                                 TPACPI_MAY_SEND_KEY(TP_ACPI_HOTKEYSCAN_FNHOME);
1476                         } else {
1477                                 TPACPI_MAY_SEND_KEY(TP_ACPI_HOTKEYSCAN_FNEND);
1478                         }
1479                 }
1480         }
1481 }
1482
1483 #undef TPACPI_COMPARE_KEY
1484 #undef TPACPI_MAY_SEND_KEY
1485
1486 static int hotkey_kthread(void *data)
1487 {
1488         struct tp_nvram_state s[2];
1489         u32 mask;
1490         unsigned int si, so;
1491         unsigned long t;
1492         unsigned int change_detector, must_reset;
1493
1494         mutex_lock(&hotkey_thread_mutex);
1495
1496         if (tpacpi_lifecycle == TPACPI_LIFE_EXITING)
1497                 goto exit;
1498
1499         set_freezable();
1500
1501         so = 0;
1502         si = 1;
1503         t = 0;
1504
1505         /* Initial state for compares */
1506         mutex_lock(&hotkey_thread_data_mutex);
1507         change_detector = hotkey_config_change;
1508         mask = hotkey_source_mask & hotkey_mask;
1509         mutex_unlock(&hotkey_thread_data_mutex);
1510         hotkey_read_nvram(&s[so], mask);
1511
1512         while (!kthread_should_stop() && hotkey_poll_freq) {
1513                 if (t == 0)
1514                         t = 1000/hotkey_poll_freq;
1515                 t = msleep_interruptible(t);
1516                 if (unlikely(kthread_should_stop()))
1517                         break;
1518                 must_reset = try_to_freeze();
1519                 if (t > 0 && !must_reset)
1520                         continue;
1521
1522                 mutex_lock(&hotkey_thread_data_mutex);
1523                 if (must_reset || hotkey_config_change != change_detector) {
1524                         /* forget old state on thaw or config change */
1525                         si = so;
1526                         t = 0;
1527                         change_detector = hotkey_config_change;
1528                 }
1529                 mask = hotkey_source_mask & hotkey_mask;
1530                 mutex_unlock(&hotkey_thread_data_mutex);
1531
1532                 if (likely(mask)) {
1533                         hotkey_read_nvram(&s[si], mask);
1534                         if (likely(si != so)) {
1535                                 hotkey_compare_and_issue_event(&s[so], &s[si],
1536                                                                 mask);
1537                         }
1538                 }
1539
1540                 so = si;
1541                 si ^= 1;
1542         }
1543
1544 exit:
1545         mutex_unlock(&hotkey_thread_mutex);
1546         return 0;
1547 }
1548
1549 static void hotkey_poll_stop_sync(void)
1550 {
1551         if (tpacpi_hotkey_task) {
1552                 if (frozen(tpacpi_hotkey_task) ||
1553                     freezing(tpacpi_hotkey_task))
1554                         thaw_process(tpacpi_hotkey_task);
1555
1556                 kthread_stop(tpacpi_hotkey_task);
1557                 tpacpi_hotkey_task = NULL;
1558                 mutex_lock(&hotkey_thread_mutex);
1559                 /* at this point, the thread did exit */
1560                 mutex_unlock(&hotkey_thread_mutex);
1561         }
1562 }
1563
1564 /* call with hotkey_mutex held */
1565 static void hotkey_poll_setup(int may_warn)
1566 {
1567         if ((hotkey_source_mask & hotkey_mask) != 0 &&
1568             hotkey_poll_freq > 0 &&
1569             (tpacpi_inputdev->users > 0 || hotkey_report_mode < 2)) {
1570                 if (!tpacpi_hotkey_task) {
1571                         tpacpi_hotkey_task = kthread_run(hotkey_kthread,
1572                                         NULL, TPACPI_NVRAM_KTHREAD_NAME);
1573                         if (IS_ERR(tpacpi_hotkey_task)) {
1574                                 tpacpi_hotkey_task = NULL;
1575                                 printk(TPACPI_ERR
1576                                        "could not create kernel thread "
1577                                        "for hotkey polling\n");
1578                         }
1579                 }
1580         } else {
1581                 hotkey_poll_stop_sync();
1582                 if (may_warn &&
1583                     hotkey_source_mask != 0 && hotkey_poll_freq == 0) {
1584                         printk(TPACPI_NOTICE
1585                                 "hot keys 0x%08x require polling, "
1586                                 "which is currently disabled\n",
1587                                 hotkey_source_mask);
1588                 }
1589         }
1590 }
1591
1592 static void hotkey_poll_setup_safe(int may_warn)
1593 {
1594         mutex_lock(&hotkey_mutex);
1595         hotkey_poll_setup(may_warn);
1596         mutex_unlock(&hotkey_mutex);
1597 }
1598
1599 #else /* CONFIG_THINKPAD_ACPI_HOTKEY_POLL */
1600
1601 static void hotkey_poll_setup_safe(int __unused)
1602 {
1603 }
1604
1605 #endif /* CONFIG_THINKPAD_ACPI_HOTKEY_POLL */
1606
1607 static int hotkey_inputdev_open(struct input_dev *dev)
1608 {
1609         switch (tpacpi_lifecycle) {
1610         case TPACPI_LIFE_INIT:
1611                 /*
1612                  * hotkey_init will call hotkey_poll_setup_safe
1613                  * at the appropriate moment
1614                  */
1615                 return 0;
1616         case TPACPI_LIFE_EXITING:
1617                 return -EBUSY;
1618         case TPACPI_LIFE_RUNNING:
1619                 hotkey_poll_setup_safe(0);
1620                 return 0;
1621         }
1622
1623         /* Should only happen if tpacpi_lifecycle is corrupt */
1624         BUG();
1625         return -EBUSY;
1626 }
1627
1628 static void hotkey_inputdev_close(struct input_dev *dev)
1629 {
1630         /* disable hotkey polling when possible */
1631         if (tpacpi_lifecycle == TPACPI_LIFE_RUNNING)
1632                 hotkey_poll_setup_safe(0);
1633 }
1634
1635 /* sysfs hotkey enable ------------------------------------------------- */
1636 static ssize_t hotkey_enable_show(struct device *dev,
1637                            struct device_attribute *attr,
1638                            char *buf)
1639 {
1640         int res, status;
1641
1642         res = hotkey_status_get(&status);
1643         if (res)
1644                 return res;
1645
1646         return snprintf(buf, PAGE_SIZE, "%d\n", status);
1647 }
1648
1649 static ssize_t hotkey_enable_store(struct device *dev,
1650                             struct device_attribute *attr,
1651                             const char *buf, size_t count)
1652 {
1653         unsigned long t;
1654         int res;
1655
1656         if (parse_strtoul(buf, 1, &t))
1657                 return -EINVAL;
1658
1659         res = hotkey_status_set(t);
1660
1661         return (res) ? res : count;
1662 }
1663
1664 static struct device_attribute dev_attr_hotkey_enable =
1665         __ATTR(hotkey_enable, S_IWUSR | S_IRUGO,
1666                 hotkey_enable_show, hotkey_enable_store);
1667
1668 /* sysfs hotkey mask --------------------------------------------------- */
1669 static ssize_t hotkey_mask_show(struct device *dev,
1670                            struct device_attribute *attr,
1671                            char *buf)
1672 {
1673         int res;
1674
1675         if (mutex_lock_interruptible(&hotkey_mutex))
1676                 return -ERESTARTSYS;
1677         res = hotkey_mask_get();
1678         mutex_unlock(&hotkey_mutex);
1679
1680         return (res)?
1681                 res : snprintf(buf, PAGE_SIZE, "0x%08x\n", hotkey_mask);
1682 }
1683
1684 static ssize_t hotkey_mask_store(struct device *dev,
1685                             struct device_attribute *attr,
1686                             const char *buf, size_t count)
1687 {
1688         unsigned long t;
1689         int res;
1690
1691         if (parse_strtoul(buf, 0xffffffffUL, &t))
1692                 return -EINVAL;
1693
1694         if (mutex_lock_interruptible(&hotkey_mutex))
1695                 return -ERESTARTSYS;
1696
1697         res = hotkey_mask_set(t);
1698
1699 #ifdef CONFIG_THINKPAD_ACPI_HOTKEY_POLL
1700         hotkey_poll_setup(1);
1701 #endif
1702
1703         mutex_unlock(&hotkey_mutex);
1704
1705         return (res) ? res : count;
1706 }
1707
1708 static struct device_attribute dev_attr_hotkey_mask =
1709         __ATTR(hotkey_mask, S_IWUSR | S_IRUGO,
1710                 hotkey_mask_show, hotkey_mask_store);
1711
1712 /* sysfs hotkey bios_enabled ------------------------------------------- */
1713 static ssize_t hotkey_bios_enabled_show(struct device *dev,
1714                            struct device_attribute *attr,
1715                            char *buf)
1716 {
1717         return snprintf(buf, PAGE_SIZE, "%d\n", hotkey_orig_status);
1718 }
1719
1720 static struct device_attribute dev_attr_hotkey_bios_enabled =
1721         __ATTR(hotkey_bios_enabled, S_IRUGO, hotkey_bios_enabled_show, NULL);
1722
1723 /* sysfs hotkey bios_mask ---------------------------------------------- */
1724 static ssize_t hotkey_bios_mask_show(struct device *dev,
1725                            struct device_attribute *attr,
1726                            char *buf)
1727 {
1728         return snprintf(buf, PAGE_SIZE, "0x%08x\n", hotkey_orig_mask);
1729 }
1730
1731 static struct device_attribute dev_attr_hotkey_bios_mask =
1732         __ATTR(hotkey_bios_mask, S_IRUGO, hotkey_bios_mask_show, NULL);
1733
1734 /* sysfs hotkey all_mask ----------------------------------------------- */
1735 static ssize_t hotkey_all_mask_show(struct device *dev,
1736                            struct device_attribute *attr,
1737                            char *buf)
1738 {
1739         return snprintf(buf, PAGE_SIZE, "0x%08x\n",
1740                                 hotkey_all_mask | hotkey_source_mask);
1741 }
1742
1743 static struct device_attribute dev_attr_hotkey_all_mask =
1744         __ATTR(hotkey_all_mask, S_IRUGO, hotkey_all_mask_show, NULL);
1745
1746 /* sysfs hotkey recommended_mask --------------------------------------- */
1747 static ssize_t hotkey_recommended_mask_show(struct device *dev,
1748                                             struct device_attribute *attr,
1749                                             char *buf)
1750 {
1751         return snprintf(buf, PAGE_SIZE, "0x%08x\n",
1752                         (hotkey_all_mask | hotkey_source_mask)
1753                         & ~hotkey_reserved_mask);
1754 }
1755
1756 static struct device_attribute dev_attr_hotkey_recommended_mask =
1757         __ATTR(hotkey_recommended_mask, S_IRUGO,
1758                 hotkey_recommended_mask_show, NULL);
1759
1760 #ifdef CONFIG_THINKPAD_ACPI_HOTKEY_POLL
1761
1762 /* sysfs hotkey hotkey_source_mask ------------------------------------- */
1763 static ssize_t hotkey_source_mask_show(struct device *dev,
1764                            struct device_attribute *attr,
1765                            char *buf)
1766 {
1767         return snprintf(buf, PAGE_SIZE, "0x%08x\n", hotkey_source_mask);
1768 }
1769
1770 static ssize_t hotkey_source_mask_store(struct device *dev,
1771                             struct device_attribute *attr,
1772                             const char *buf, size_t count)
1773 {
1774         unsigned long t;
1775
1776         if (parse_strtoul(buf, 0xffffffffUL, &t) ||
1777                 ((t & ~TPACPI_HKEY_NVRAM_KNOWN_MASK) != 0))
1778                 return -EINVAL;
1779
1780         if (mutex_lock_interruptible(&hotkey_mutex))
1781                 return -ERESTARTSYS;
1782
1783         HOTKEY_CONFIG_CRITICAL_START
1784         hotkey_source_mask = t;
1785         HOTKEY_CONFIG_CRITICAL_END
1786
1787         hotkey_poll_setup(1);
1788
1789         mutex_unlock(&hotkey_mutex);
1790
1791         return count;
1792 }
1793
1794 static struct device_attribute dev_attr_hotkey_source_mask =
1795         __ATTR(hotkey_source_mask, S_IWUSR | S_IRUGO,
1796                 hotkey_source_mask_show, hotkey_source_mask_store);
1797
1798 /* sysfs hotkey hotkey_poll_freq --------------------------------------- */
1799 static ssize_t hotkey_poll_freq_show(struct device *dev,
1800                            struct device_attribute *attr,
1801                            char *buf)
1802 {
1803         return snprintf(buf, PAGE_SIZE, "%d\n", hotkey_poll_freq);
1804 }
1805
1806 static ssize_t hotkey_poll_freq_store(struct device *dev,
1807                             struct device_attribute *attr,
1808                             const char *buf, size_t count)
1809 {
1810         unsigned long t;
1811
1812         if (parse_strtoul(buf, 25, &t))
1813                 return -EINVAL;
1814
1815         if (mutex_lock_interruptible(&hotkey_mutex))
1816                 return -ERESTARTSYS;
1817
1818         hotkey_poll_freq = t;
1819
1820         hotkey_poll_setup(1);
1821         mutex_unlock(&hotkey_mutex);
1822
1823         return count;
1824 }
1825
1826 static struct device_attribute dev_attr_hotkey_poll_freq =
1827         __ATTR(hotkey_poll_freq, S_IWUSR | S_IRUGO,
1828                 hotkey_poll_freq_show, hotkey_poll_freq_store);
1829
1830 #endif /* CONFIG_THINKPAD_ACPI_HOTKEY_POLL */
1831
1832 /* sysfs hotkey radio_sw (pollable) ------------------------------------ */
1833 static ssize_t hotkey_radio_sw_show(struct device *dev,
1834                            struct device_attribute *attr,
1835                            char *buf)
1836 {
1837         int res, s;
1838         res = hotkey_get_wlsw(&s);
1839         if (res < 0)
1840                 return res;
1841
1842         return snprintf(buf, PAGE_SIZE, "%d\n", !!s);
1843 }
1844
1845 static struct device_attribute dev_attr_hotkey_radio_sw =
1846         __ATTR(hotkey_radio_sw, S_IRUGO, hotkey_radio_sw_show, NULL);
1847
1848 static void hotkey_radio_sw_notify_change(void)
1849 {
1850         if (tp_features.hotkey_wlsw)
1851                 sysfs_notify(&tpacpi_pdev->dev.kobj, NULL,
1852                              "hotkey_radio_sw");
1853 }
1854
1855 /* sysfs hotkey tablet mode (pollable) --------------------------------- */
1856 static ssize_t hotkey_tablet_mode_show(struct device *dev,
1857                            struct device_attribute *attr,
1858                            char *buf)
1859 {
1860         int res, s;
1861         res = hotkey_get_tablet_mode(&s);
1862         if (res < 0)
1863                 return res;
1864
1865         return snprintf(buf, PAGE_SIZE, "%d\n", !!s);
1866 }
1867
1868 static struct device_attribute dev_attr_hotkey_tablet_mode =
1869         __ATTR(hotkey_tablet_mode, S_IRUGO, hotkey_tablet_mode_show, NULL);
1870
1871 static void hotkey_tablet_mode_notify_change(void)
1872 {
1873         if (tp_features.hotkey_tablet)
1874                 sysfs_notify(&tpacpi_pdev->dev.kobj, NULL,
1875                              "hotkey_tablet_mode");
1876 }
1877
1878 /* sysfs hotkey report_mode -------------------------------------------- */
1879 static ssize_t hotkey_report_mode_show(struct device *dev,
1880                            struct device_attribute *attr,
1881                            char *buf)
1882 {
1883         return snprintf(buf, PAGE_SIZE, "%d\n",
1884                 (hotkey_report_mode != 0) ? hotkey_report_mode : 1);
1885 }
1886
1887 static struct device_attribute dev_attr_hotkey_report_mode =
1888         __ATTR(hotkey_report_mode, S_IRUGO, hotkey_report_mode_show, NULL);
1889
1890 /* sysfs wakeup reason (pollable) -------------------------------------- */
1891 static ssize_t hotkey_wakeup_reason_show(struct device *dev,
1892                            struct device_attribute *attr,
1893                            char *buf)
1894 {
1895         return snprintf(buf, PAGE_SIZE, "%d\n", hotkey_wakeup_reason);
1896 }
1897
1898 static struct device_attribute dev_attr_hotkey_wakeup_reason =
1899         __ATTR(wakeup_reason, S_IRUGO, hotkey_wakeup_reason_show, NULL);
1900
1901 static void hotkey_wakeup_reason_notify_change(void)
1902 {
1903         if (tp_features.hotkey_mask)
1904                 sysfs_notify(&tpacpi_pdev->dev.kobj, NULL,
1905                              "wakeup_reason");
1906 }
1907
1908 /* sysfs wakeup hotunplug_complete (pollable) -------------------------- */
1909 static ssize_t hotkey_wakeup_hotunplug_complete_show(struct device *dev,
1910                            struct device_attribute *attr,
1911                            char *buf)
1912 {
1913         return snprintf(buf, PAGE_SIZE, "%d\n", hotkey_autosleep_ack);
1914 }
1915
1916 static struct device_attribute dev_attr_hotkey_wakeup_hotunplug_complete =
1917         __ATTR(wakeup_hotunplug_complete, S_IRUGO,
1918                hotkey_wakeup_hotunplug_complete_show, NULL);
1919
1920 static void hotkey_wakeup_hotunplug_complete_notify_change(void)
1921 {
1922         if (tp_features.hotkey_mask)
1923                 sysfs_notify(&tpacpi_pdev->dev.kobj, NULL,
1924                              "wakeup_hotunplug_complete");
1925 }
1926
1927 /* --------------------------------------------------------------------- */
1928
1929 static struct attribute *hotkey_attributes[] __initdata = {
1930         &dev_attr_hotkey_enable.attr,
1931         &dev_attr_hotkey_bios_enabled.attr,
1932         &dev_attr_hotkey_report_mode.attr,
1933 #ifdef CONFIG_THINKPAD_ACPI_HOTKEY_POLL
1934         &dev_attr_hotkey_mask.attr,
1935         &dev_attr_hotkey_all_mask.attr,
1936         &dev_attr_hotkey_recommended_mask.attr,
1937         &dev_attr_hotkey_source_mask.attr,
1938         &dev_attr_hotkey_poll_freq.attr,
1939 #endif
1940 };
1941
1942 static struct attribute *hotkey_mask_attributes[] __initdata = {
1943         &dev_attr_hotkey_bios_mask.attr,
1944 #ifndef CONFIG_THINKPAD_ACPI_HOTKEY_POLL
1945         &dev_attr_hotkey_mask.attr,
1946         &dev_attr_hotkey_all_mask.attr,
1947         &dev_attr_hotkey_recommended_mask.attr,
1948 #endif
1949         &dev_attr_hotkey_wakeup_reason.attr,
1950         &dev_attr_hotkey_wakeup_hotunplug_complete.attr,
1951 };
1952
1953 static void bluetooth_update_rfk(void);
1954 static void wan_update_rfk(void);
1955 static void tpacpi_send_radiosw_update(void)
1956 {
1957         int wlsw;
1958
1959         /* Sync these BEFORE sending any rfkill events */
1960         if (tp_features.bluetooth)
1961                 bluetooth_update_rfk();
1962         if (tp_features.wan)
1963                 wan_update_rfk();
1964
1965         if (tp_features.hotkey_wlsw && !hotkey_get_wlsw(&wlsw)) {
1966                 mutex_lock(&tpacpi_inputdev_send_mutex);
1967
1968                 input_report_switch(tpacpi_inputdev,
1969                                     SW_RFKILL_ALL, !!wlsw);
1970                 input_sync(tpacpi_inputdev);
1971
1972                 mutex_unlock(&tpacpi_inputdev_send_mutex);
1973         }
1974         hotkey_radio_sw_notify_change();
1975 }
1976
1977 static void hotkey_exit(void)
1978 {
1979 #ifdef CONFIG_THINKPAD_ACPI_HOTKEY_POLL
1980         hotkey_poll_stop_sync();
1981 #endif
1982
1983         if (hotkey_dev_attributes)
1984                 delete_attr_set(hotkey_dev_attributes, &tpacpi_pdev->dev.kobj);
1985
1986         kfree(hotkey_keycode_map);
1987
1988         if (tp_features.hotkey) {
1989                 dbg_printk(TPACPI_DBG_EXIT,
1990                            "restoring original hot key mask\n");
1991                 /* no short-circuit boolean operator below! */
1992                 if ((hotkey_mask_set(hotkey_orig_mask) |
1993                      hotkey_status_set(hotkey_orig_status)) != 0)
1994                         printk(TPACPI_ERR
1995                                "failed to restore hot key mask "
1996                                "to BIOS defaults\n");
1997         }
1998 }
1999
2000 static int __init hotkey_init(struct ibm_init_struct *iibm)
2001 {
2002         /* Requirements for changing the default keymaps:
2003          *
2004          * 1. Many of the keys are mapped to KEY_RESERVED for very
2005          *    good reasons.  Do not change them unless you have deep
2006          *    knowledge on the IBM and Lenovo ThinkPad firmware for
2007          *    the various ThinkPad models.  The driver behaves
2008          *    differently for KEY_RESERVED: such keys have their
2009          *    hot key mask *unset* in mask_recommended, and also
2010          *    in the initial hot key mask programmed into the
2011          *    firmware at driver load time, which means the firm-
2012          *    ware may react very differently if you change them to
2013          *    something else;
2014          *
2015          * 2. You must be subscribed to the linux-thinkpad and
2016          *    ibm-acpi-devel mailing lists, and you should read the
2017          *    list archives since 2007 if you want to change the
2018          *    keymaps.  This requirement exists so that you will
2019          *    know the past history of problems with the thinkpad-
2020          *    acpi driver keymaps, and also that you will be
2021          *    listening to any bug reports;
2022          *
2023          * 3. Do not send thinkpad-acpi specific patches directly to
2024          *    for merging, *ever*.  Send them to the linux-acpi
2025          *    mailinglist for comments.  Merging is to be done only
2026          *    through acpi-test and the ACPI maintainer.
2027          *
2028          * If the above is too much to ask, don't change the keymap.
2029          * Ask the thinkpad-acpi maintainer to do it, instead.
2030          */
2031         static u16 ibm_keycode_map[] __initdata = {
2032                 /* Scan Codes 0x00 to 0x0B: ACPI HKEY FN+F1..F12 */
2033                 KEY_FN_F1,      KEY_FN_F2,      KEY_COFFEE,     KEY_SLEEP,
2034                 KEY_WLAN,       KEY_FN_F6, KEY_SWITCHVIDEOMODE, KEY_FN_F8,
2035                 KEY_FN_F9,      KEY_FN_F10,     KEY_FN_F11,     KEY_SUSPEND,
2036
2037                 /* Scan codes 0x0C to 0x1F: Other ACPI HKEY hot keys */
2038                 KEY_UNKNOWN,    /* 0x0C: FN+BACKSPACE */
2039                 KEY_UNKNOWN,    /* 0x0D: FN+INSERT */
2040                 KEY_UNKNOWN,    /* 0x0E: FN+DELETE */
2041
2042                 /* brightness: firmware always reacts to them, unless
2043                  * X.org did some tricks in the radeon BIOS scratch
2044                  * registers of *some* models */
2045                 KEY_RESERVED,   /* 0x0F: FN+HOME (brightness up) */
2046                 KEY_RESERVED,   /* 0x10: FN+END (brightness down) */
2047
2048                 /* Thinklight: firmware always react to it */
2049                 KEY_RESERVED,   /* 0x11: FN+PGUP (thinklight toggle) */
2050
2051                 KEY_UNKNOWN,    /* 0x12: FN+PGDOWN */
2052                 KEY_ZOOM,       /* 0x13: FN+SPACE (zoom) */
2053
2054                 /* Volume: firmware always react to it and reprograms
2055                  * the built-in *extra* mixer.  Never map it to control
2056                  * another mixer by default. */
2057                 KEY_RESERVED,   /* 0x14: VOLUME UP */
2058                 KEY_RESERVED,   /* 0x15: VOLUME DOWN */
2059                 KEY_RESERVED,   /* 0x16: MUTE */
2060
2061                 KEY_VENDOR,     /* 0x17: Thinkpad/AccessIBM/Lenovo */
2062
2063                 /* (assignments unknown, please report if found) */
2064                 KEY_UNKNOWN, KEY_UNKNOWN, KEY_UNKNOWN, KEY_UNKNOWN,
2065                 KEY_UNKNOWN, KEY_UNKNOWN, KEY_UNKNOWN, KEY_UNKNOWN,
2066         };
2067         static u16 lenovo_keycode_map[] __initdata = {
2068                 /* Scan Codes 0x00 to 0x0B: ACPI HKEY FN+F1..F12 */
2069                 KEY_FN_F1,      KEY_COFFEE,     KEY_BATTERY,    KEY_SLEEP,
2070                 KEY_WLAN,       KEY_FN_F6, KEY_SWITCHVIDEOMODE, KEY_FN_F8,
2071                 KEY_FN_F9,      KEY_FN_F10,     KEY_FN_F11,     KEY_SUSPEND,
2072
2073                 /* Scan codes 0x0C to 0x1F: Other ACPI HKEY hot keys */
2074                 KEY_UNKNOWN,    /* 0x0C: FN+BACKSPACE */
2075                 KEY_UNKNOWN,    /* 0x0D: FN+INSERT */
2076                 KEY_UNKNOWN,    /* 0x0E: FN+DELETE */
2077
2078                 /* These either have to go through ACPI video, or
2079                  * act like in the IBM ThinkPads, so don't ever
2080                  * enable them by default */
2081                 KEY_RESERVED,   /* 0x0F: FN+HOME (brightness up) */
2082                 KEY_RESERVED,   /* 0x10: FN+END (brightness down) */
2083
2084                 KEY_RESERVED,   /* 0x11: FN+PGUP (thinklight toggle) */
2085
2086                 KEY_UNKNOWN,    /* 0x12: FN+PGDOWN */
2087                 KEY_ZOOM,       /* 0x13: FN+SPACE (zoom) */
2088
2089                 /* Volume: z60/z61, T60 (BIOS version?): firmware always
2090                  * react to it and reprograms the built-in *extra* mixer.
2091                  * Never map it to control another mixer by default.
2092                  *
2093                  * T60?, T61, R60?, R61: firmware and EC tries to send
2094                  * these over the regular keyboard, so these are no-ops,
2095                  * but there are still weird bugs re. MUTE, so do not
2096                  * change unless you get test reports from all Lenovo
2097                  * models.  May cause the BIOS to interfere with the
2098                  * HDA mixer.
2099                  */
2100                 KEY_RESERVED,   /* 0x14: VOLUME UP */
2101                 KEY_RESERVED,   /* 0x15: VOLUME DOWN */
2102                 KEY_RESERVED,   /* 0x16: MUTE */
2103
2104                 KEY_VENDOR,     /* 0x17: Thinkpad/AccessIBM/Lenovo */
2105
2106                 /* (assignments unknown, please report if found) */
2107                 KEY_UNKNOWN, KEY_UNKNOWN, KEY_UNKNOWN, KEY_UNKNOWN,
2108                 KEY_UNKNOWN, KEY_UNKNOWN, KEY_UNKNOWN, KEY_UNKNOWN,
2109         };
2110
2111 #define TPACPI_HOTKEY_MAP_LEN           ARRAY_SIZE(ibm_keycode_map)
2112 #define TPACPI_HOTKEY_MAP_SIZE          sizeof(ibm_keycode_map)
2113 #define TPACPI_HOTKEY_MAP_TYPESIZE      sizeof(ibm_keycode_map[0])
2114
2115         int res, i;
2116         int status;
2117         int hkeyv;
2118
2119         vdbg_printk(TPACPI_DBG_INIT, "initializing hotkey subdriver\n");
2120
2121         BUG_ON(!tpacpi_inputdev);
2122         BUG_ON(tpacpi_inputdev->open != NULL ||
2123                tpacpi_inputdev->close != NULL);
2124
2125         TPACPI_ACPIHANDLE_INIT(hkey);
2126         mutex_init(&hotkey_mutex);
2127
2128 #ifdef CONFIG_THINKPAD_ACPI_HOTKEY_POLL
2129         mutex_init(&hotkey_thread_mutex);
2130         mutex_init(&hotkey_thread_data_mutex);
2131 #endif
2132
2133         /* hotkey not supported on 570 */
2134         tp_features.hotkey = hkey_handle != NULL;
2135
2136         vdbg_printk(TPACPI_DBG_INIT, "hotkeys are %s\n",
2137                 str_supported(tp_features.hotkey));
2138
2139         if (!tp_features.hotkey)
2140                 return 1;
2141
2142         hotkey_dev_attributes = create_attr_set(13, NULL);
2143         if (!hotkey_dev_attributes)
2144                 return -ENOMEM;
2145         res = add_many_to_attr_set(hotkey_dev_attributes,
2146                         hotkey_attributes,
2147                         ARRAY_SIZE(hotkey_attributes));
2148         if (res)
2149                 goto err_exit;
2150
2151         /* mask not supported on 570, 600e/x, 770e, 770x, A21e, A2xm/p,
2152            A30, R30, R31, T20-22, X20-21, X22-24.  Detected by checking
2153            for HKEY interface version 0x100 */
2154         if (acpi_evalf(hkey_handle, &hkeyv, "MHKV", "qd")) {
2155                 if ((hkeyv >> 8) != 1) {
2156                         printk(TPACPI_ERR "unknown version of the "
2157                                "HKEY interface: 0x%x\n", hkeyv);
2158                         printk(TPACPI_ERR "please report this to %s\n",
2159                                TPACPI_MAIL);
2160                 } else {
2161                         /*
2162                          * MHKV 0x100 in A31, R40, R40e,
2163                          * T4x, X31, and later
2164                          */
2165                         tp_features.hotkey_mask = 1;
2166                 }
2167         }
2168
2169         vdbg_printk(TPACPI_DBG_INIT, "hotkey masks are %s\n",
2170                 str_supported(tp_features.hotkey_mask));
2171
2172         if (tp_features.hotkey_mask) {
2173                 if (!acpi_evalf(hkey_handle, &hotkey_all_mask,
2174                                 "MHKA", "qd")) {
2175                         printk(TPACPI_ERR
2176                                "missing MHKA handler, "
2177                                "please report this to %s\n",
2178                                TPACPI_MAIL);
2179                         /* FN+F12, FN+F4, FN+F3 */
2180                         hotkey_all_mask = 0x080cU;
2181                 }
2182         }
2183
2184         /* hotkey_source_mask *must* be zero for
2185          * the first hotkey_mask_get */
2186         res = hotkey_status_get(&hotkey_orig_status);
2187         if (res)
2188                 goto err_exit;
2189
2190         if (tp_features.hotkey_mask) {
2191                 res = hotkey_mask_get();
2192                 if (res)
2193                         goto err_exit;
2194
2195                 hotkey_orig_mask = hotkey_mask;
2196                 res = add_many_to_attr_set(
2197                                 hotkey_dev_attributes,
2198                                 hotkey_mask_attributes,
2199                                 ARRAY_SIZE(hotkey_mask_attributes));
2200                 if (res)
2201                         goto err_exit;
2202         }
2203
2204 #ifdef CONFIG_THINKPAD_ACPI_HOTKEY_POLL
2205         if (tp_features.hotkey_mask) {
2206                 hotkey_source_mask = TPACPI_HKEY_NVRAM_GOOD_MASK
2207                                         & ~hotkey_all_mask;
2208         } else {
2209                 hotkey_source_mask = TPACPI_HKEY_NVRAM_GOOD_MASK;
2210         }
2211
2212         vdbg_printk(TPACPI_DBG_INIT,
2213                     "hotkey source mask 0x%08x, polling freq %d\n",
2214                     hotkey_source_mask, hotkey_poll_freq);
2215 #endif
2216
2217         /* Not all thinkpads have a hardware radio switch */
2218         if (acpi_evalf(hkey_handle, &status, "WLSW", "qd")) {
2219                 tp_features.hotkey_wlsw = 1;
2220                 printk(TPACPI_INFO
2221                         "radio switch found; radios are %s\n",
2222                         enabled(status, 0));
2223         }
2224         if (tp_features.hotkey_wlsw)
2225                 res = add_to_attr_set(hotkey_dev_attributes,
2226                                 &dev_attr_hotkey_radio_sw.attr);
2227
2228         /* For X41t, X60t, X61t Tablets... */
2229         if (!res && acpi_evalf(hkey_handle, &status, "MHKG", "qd")) {
2230                 tp_features.hotkey_tablet = 1;
2231                 printk(TPACPI_INFO
2232                         "possible tablet mode switch found; "
2233                         "ThinkPad in %s mode\n",
2234                         (status & TP_HOTKEY_TABLET_MASK)?
2235                                 "tablet" : "laptop");
2236                 res = add_to_attr_set(hotkey_dev_attributes,
2237                                 &dev_attr_hotkey_tablet_mode.attr);
2238         }
2239
2240         if (!res)
2241                 res = register_attr_set_with_sysfs(
2242                                 hotkey_dev_attributes,
2243                                 &tpacpi_pdev->dev.kobj);
2244         if (res)
2245                 goto err_exit;
2246
2247         /* Set up key map */
2248
2249         hotkey_keycode_map = kmalloc(TPACPI_HOTKEY_MAP_SIZE,
2250                                         GFP_KERNEL);
2251         if (!hotkey_keycode_map) {
2252                 printk(TPACPI_ERR
2253                         "failed to allocate memory for key map\n");
2254                 res = -ENOMEM;
2255                 goto err_exit;
2256         }
2257
2258         if (thinkpad_id.vendor == PCI_VENDOR_ID_LENOVO) {
2259                 dbg_printk(TPACPI_DBG_INIT,
2260                            "using Lenovo default hot key map\n");
2261                 memcpy(hotkey_keycode_map, &lenovo_keycode_map,
2262                         TPACPI_HOTKEY_MAP_SIZE);
2263         } else {
2264                 dbg_printk(TPACPI_DBG_INIT,
2265                            "using IBM default hot key map\n");
2266                 memcpy(hotkey_keycode_map, &ibm_keycode_map,
2267                         TPACPI_HOTKEY_MAP_SIZE);
2268         }
2269
2270         set_bit(EV_KEY, tpacpi_inputdev->evbit);
2271         set_bit(EV_MSC, tpacpi_inputdev->evbit);
2272         set_bit(MSC_SCAN, tpacpi_inputdev->mscbit);
2273         tpacpi_inputdev->keycodesize = TPACPI_HOTKEY_MAP_TYPESIZE;
2274         tpacpi_inputdev->keycodemax = TPACPI_HOTKEY_MAP_LEN;
2275         tpacpi_inputdev->keycode = hotkey_keycode_map;
2276         for (i = 0; i < TPACPI_HOTKEY_MAP_LEN; i++) {
2277                 if (hotkey_keycode_map[i] != KEY_RESERVED) {
2278                         set_bit(hotkey_keycode_map[i],
2279                                 tpacpi_inputdev->keybit);
2280                 } else {
2281                         if (i < sizeof(hotkey_reserved_mask)*8)
2282                                 hotkey_reserved_mask |= 1 << i;
2283                 }
2284         }
2285
2286         if (tp_features.hotkey_wlsw) {
2287                 set_bit(EV_SW, tpacpi_inputdev->evbit);
2288                 set_bit(SW_RFKILL_ALL, tpacpi_inputdev->swbit);
2289         }
2290         if (tp_features.hotkey_tablet) {
2291                 set_bit(EV_SW, tpacpi_inputdev->evbit);
2292                 set_bit(SW_TABLET_MODE, tpacpi_inputdev->swbit);
2293         }
2294
2295         /* Do not issue duplicate brightness change events to
2296          * userspace */
2297         if (!tp_features.bright_acpimode)
2298                 /* update bright_acpimode... */
2299                 tpacpi_check_std_acpi_brightness_support();
2300
2301         if (tp_features.bright_acpimode) {
2302                 printk(TPACPI_INFO
2303                        "This ThinkPad has standard ACPI backlight "
2304                        "brightness control, supported by the ACPI "
2305                        "video driver\n");
2306                 printk(TPACPI_NOTICE
2307                        "Disabling thinkpad-acpi brightness events "
2308                        "by default...\n");
2309
2310                 /* The hotkey_reserved_mask change below is not
2311                  * necessary while the keys are at KEY_RESERVED in the
2312                  * default map, but better safe than sorry, leave it
2313                  * here as a marker of what we have to do, especially
2314                  * when we finally become able to set this at runtime
2315                  * on response to X.org requests */
2316                 hotkey_reserved_mask |=
2317                         (1 << TP_ACPI_HOTKEYSCAN_FNHOME)
2318                         | (1 << TP_ACPI_HOTKEYSCAN_FNEND);
2319         }
2320
2321         dbg_printk(TPACPI_DBG_INIT, "enabling hot key handling\n");
2322         res = hotkey_status_set(1);
2323         if (res) {
2324                 hotkey_exit();
2325                 return res;
2326         }
2327         res = hotkey_mask_set(((hotkey_all_mask | hotkey_source_mask)
2328                                 & ~hotkey_reserved_mask)
2329                                 | hotkey_orig_mask);
2330         if (res < 0 && res != -ENXIO) {
2331                 hotkey_exit();
2332                 return res;
2333         }
2334
2335         dbg_printk(TPACPI_DBG_INIT,
2336                         "legacy hot key reporting over procfs %s\n",
2337                         (hotkey_report_mode < 2) ?
2338                                 "enabled" : "disabled");
2339
2340         tpacpi_inputdev->open = &hotkey_inputdev_open;
2341         tpacpi_inputdev->close = &hotkey_inputdev_close;
2342
2343         hotkey_poll_setup_safe(1);
2344         tpacpi_send_radiosw_update();
2345         tpacpi_input_send_tabletsw();
2346
2347         return 0;
2348
2349 err_exit:
2350         delete_attr_set(hotkey_dev_attributes, &tpacpi_pdev->dev.kobj);
2351         hotkey_dev_attributes = NULL;
2352
2353         return (res < 0)? res : 1;
2354 }
2355
2356 static void hotkey_notify(struct ibm_struct *ibm, u32 event)
2357 {
2358         u32 hkey;
2359         unsigned int scancode;
2360         int send_acpi_ev;
2361         int ignore_acpi_ev;
2362         int unk_ev;
2363
2364         if (event != 0x80) {
2365                 printk(TPACPI_ERR
2366                        "unknown HKEY notification event %d\n", event);
2367                 /* forward it to userspace, maybe it knows how to handle it */
2368                 acpi_bus_generate_netlink_event(
2369                                         ibm->acpi->device->pnp.device_class,
2370                                         ibm->acpi->device->dev.bus_id,
2371                                         event, 0);
2372                 return;
2373         }
2374
2375         while (1) {
2376                 if (!acpi_evalf(hkey_handle, &hkey, "MHKP", "d")) {
2377                         printk(TPACPI_ERR "failed to retrieve HKEY event\n");
2378                         return;
2379                 }
2380
2381                 if (hkey == 0) {
2382                         /* queue empty */
2383                         return;
2384                 }
2385
2386                 send_acpi_ev = 1;
2387                 ignore_acpi_ev = 0;
2388                 unk_ev = 0;
2389
2390                 switch (hkey >> 12) {
2391                 case 1:
2392                         /* 0x1000-0x1FFF: key presses */
2393                         scancode = hkey & 0xfff;
2394                         if (scancode > 0 && scancode < 0x21) {
2395                                 scancode--;
2396                                 if (!(hotkey_source_mask & (1 << scancode))) {
2397                                         tpacpi_input_send_key(scancode);
2398                                         send_acpi_ev = 0;
2399                                 } else {
2400                                         ignore_acpi_ev = 1;
2401                                 }
2402                         } else {
2403                                 unk_ev = 1;
2404                         }
2405                         break;
2406                 case 2:
2407                         /* Wakeup reason */
2408                         switch (hkey) {
2409                         case 0x2304: /* suspend, undock */
2410                         case 0x2404: /* hibernation, undock */
2411                                 hotkey_wakeup_reason = TP_ACPI_WAKEUP_UNDOCK;
2412                                 ignore_acpi_ev = 1;
2413                                 break;
2414                         case 0x2305: /* suspend, bay eject */
2415                         case 0x2405: /* hibernation, bay eject */
2416                                 hotkey_wakeup_reason = TP_ACPI_WAKEUP_BAYEJ;
2417                                 ignore_acpi_ev = 1;
2418                                 break;
2419                         default:
2420                                 unk_ev = 1;
2421                         }
2422                         if (hotkey_wakeup_reason != TP_ACPI_WAKEUP_NONE) {
2423                                 printk(TPACPI_INFO
2424                                        "woke up due to a hot-unplug "
2425                                        "request...\n");
2426                                 hotkey_wakeup_reason_notify_change();
2427                         }
2428                         break;
2429                 case 3:
2430                         /* bay-related wakeups */
2431                         if (hkey == 0x3003) {
2432                                 hotkey_autosleep_ack = 1;
2433                                 printk(TPACPI_INFO
2434                                        "bay ejected\n");
2435                                 hotkey_wakeup_hotunplug_complete_notify_change();
2436                         } else {
2437                                 unk_ev = 1;
2438                         }
2439                         break;
2440                 case 4:
2441                         /* dock-related wakeups */
2442                         if (hkey == 0x4003) {
2443                                 hotkey_autosleep_ack = 1;
2444                                 printk(TPACPI_INFO
2445                                        "undocked\n");
2446                                 hotkey_wakeup_hotunplug_complete_notify_change();
2447                         } else {
2448                                 unk_ev = 1;
2449                         }
2450                         break;
2451                 case 5:
2452                         /* 0x5000-0x5FFF: human interface helpers */
2453                         switch (hkey) {
2454                         case 0x5010: /* Lenovo new BIOS: brightness changed */
2455                         case 0x500b: /* X61t: tablet pen inserted into bay */
2456                         case 0x500c: /* X61t: tablet pen removed from bay */
2457                                 break;
2458                         case 0x5009: /* X41t-X61t: swivel up (tablet mode) */
2459                         case 0x500a: /* X41t-X61t: swivel down (normal mode) */
2460                                 tpacpi_input_send_tabletsw();
2461                                 hotkey_tablet_mode_notify_change();
2462                                 send_acpi_ev = 0;
2463                                 break;
2464                         case 0x5001:
2465                         case 0x5002:
2466                                 /* LID switch events.  Do not propagate */
2467                                 ignore_acpi_ev = 1;
2468                                 break;
2469                         default:
2470                                 unk_ev = 1;
2471                         }
2472                         break;
2473                 case 7:
2474                         /* 0x7000-0x7FFF: misc */
2475                         if (tp_features.hotkey_wlsw && hkey == 0x7000) {
2476                                 tpacpi_send_radiosw_update();
2477                                 send_acpi_ev = 0;
2478                                 break;
2479                         }
2480                         /* fallthrough to default */
2481                 default:
2482                         unk_ev = 1;
2483                 }
2484                 if (unk_ev) {
2485                         printk(TPACPI_NOTICE
2486                                "unhandled HKEY event 0x%04x\n", hkey);
2487                 }
2488
2489                 /* Legacy events */
2490                 if (!ignore_acpi_ev &&
2491                     (send_acpi_ev || hotkey_report_mode < 2)) {
2492                         acpi_bus_generate_proc_event(ibm->acpi->device,
2493                                                      event, hkey);
2494                 }
2495
2496                 /* netlink events */
2497                 if (!ignore_acpi_ev && send_acpi_ev) {
2498                         acpi_bus_generate_netlink_event(
2499                                         ibm->acpi->device->pnp.device_class,
2500                                         ibm->acpi->device->dev.bus_id,
2501                                         event, hkey);
2502                 }
2503         }
2504 }
2505
2506 static void hotkey_suspend(pm_message_t state)
2507 {
2508         /* Do these on suspend, we get the events on early resume! */
2509         hotkey_wakeup_reason = TP_ACPI_WAKEUP_NONE;
2510         hotkey_autosleep_ack = 0;
2511 }
2512
2513 static void hotkey_resume(void)
2514 {
2515         if (hotkey_mask_get())
2516                 printk(TPACPI_ERR
2517                        "error while trying to read hot key mask "
2518                        "from firmware\n");
2519         tpacpi_send_radiosw_update();
2520         hotkey_tablet_mode_notify_change();
2521         hotkey_wakeup_reason_notify_change();
2522         hotkey_wakeup_hotunplug_complete_notify_change();
2523         hotkey_poll_setup_safe(0);
2524 }
2525
2526 /* procfs -------------------------------------------------------------- */
2527 static int hotkey_read(char *p)
2528 {
2529         int res, status;
2530         int len = 0;
2531
2532         if (!tp_features.hotkey) {
2533                 len += sprintf(p + len, "status:\t\tnot supported\n");
2534                 return len;
2535         }
2536
2537         if (mutex_lock_interruptible(&hotkey_mutex))
2538                 return -ERESTARTSYS;
2539         res = hotkey_status_get(&status);
2540         if (!res)
2541                 res = hotkey_mask_get();
2542         mutex_unlock(&hotkey_mutex);
2543         if (res)
2544                 return res;
2545
2546         len += sprintf(p + len, "status:\t\t%s\n", enabled(status, 0));
2547         if (tp_features.hotkey_mask) {
2548                 len += sprintf(p + len, "mask:\t\t0x%08x\n", hotkey_mask);
2549                 len += sprintf(p + len,
2550                                "commands:\tenable, disable, reset, <mask>\n");
2551         } else {
2552                 len += sprintf(p + len, "mask:\t\tnot supported\n");
2553                 len += sprintf(p + len, "commands:\tenable, disable, reset\n");
2554         }
2555
2556         return len;
2557 }
2558
2559 static int hotkey_write(char *buf)
2560 {
2561         int res, status;
2562         u32 mask;
2563         char *cmd;
2564
2565         if (!tp_features.hotkey)
2566                 return -ENODEV;
2567
2568         if (mutex_lock_interruptible(&hotkey_mutex))
2569                 return -ERESTARTSYS;
2570
2571         status = -1;
2572         mask = hotkey_mask;
2573
2574         res = 0;
2575         while ((cmd = next_cmd(&buf))) {
2576                 if (strlencmp(cmd, "enable") == 0) {
2577                         status = 1;
2578                 } else if (strlencmp(cmd, "disable") == 0) {
2579                         status = 0;
2580                 } else if (strlencmp(cmd, "reset") == 0) {
2581                         status = hotkey_orig_status;
2582                         mask = hotkey_orig_mask;
2583                 } else if (sscanf(cmd, "0x%x", &mask) == 1) {
2584                         /* mask set */
2585                 } else if (sscanf(cmd, "%x", &mask) == 1) {
2586                         /* mask set */
2587                 } else {
2588                         res = -EINVAL;
2589                         goto errexit;
2590                 }
2591         }
2592         if (status != -1)
2593                 res = hotkey_status_set(status);
2594
2595         if (!res && mask != hotkey_mask)
2596                 res = hotkey_mask_set(mask);
2597
2598 errexit:
2599         mutex_unlock(&hotkey_mutex);
2600         return res;
2601 }
2602
2603 static const struct acpi_device_id ibm_htk_device_ids[] = {
2604         {TPACPI_ACPI_HKEY_HID, 0},
2605         {"", 0},
2606 };
2607
2608 static struct tp_acpi_drv_struct ibm_hotkey_acpidriver = {
2609         .hid = ibm_htk_device_ids,
2610         .notify = hotkey_notify,
2611         .handle = &hkey_handle,
2612         .type = ACPI_DEVICE_NOTIFY,
2613 };
2614
2615 static struct ibm_struct hotkey_driver_data = {
2616         .name = "hotkey",
2617         .read = hotkey_read,
2618         .write = hotkey_write,
2619         .exit = hotkey_exit,
2620         .resume = hotkey_resume,
2621         .suspend = hotkey_suspend,
2622         .acpi = &ibm_hotkey_acpidriver,
2623 };
2624
2625 /*************************************************************************
2626  * Bluetooth subdriver
2627  */
2628
2629 enum {
2630         /* ACPI GBDC/SBDC bits */
2631         TP_ACPI_BLUETOOTH_HWPRESENT     = 0x01, /* Bluetooth hw available */
2632         TP_ACPI_BLUETOOTH_RADIOSSW      = 0x02, /* Bluetooth radio enabled */
2633         TP_ACPI_BLUETOOTH_UNK           = 0x04, /* unknown function */
2634 };
2635
2636 static struct rfkill *tpacpi_bluetooth_rfkill;
2637
2638 static int bluetooth_get_radiosw(void)
2639 {
2640         int status;
2641
2642         if (!tp_features.bluetooth)
2643                 return -ENODEV;
2644
2645         /* WLSW overrides bluetooth in firmware/hardware, reflect that */
2646         if (tp_features.hotkey_wlsw && !hotkey_get_wlsw(&status) && !status)
2647                 return RFKILL_STATE_HARD_BLOCKED;
2648
2649         if (!acpi_evalf(hkey_handle, &status, "GBDC", "d"))
2650                 return -EIO;
2651
2652         return ((status & TP_ACPI_BLUETOOTH_RADIOSSW) != 0) ?
2653                 RFKILL_STATE_UNBLOCKED : RFKILL_STATE_SOFT_BLOCKED;
2654 }
2655
2656 static void bluetooth_update_rfk(void)
2657 {
2658         int status;
2659
2660         if (!tpacpi_bluetooth_rfkill)
2661                 return;
2662
2663         status = bluetooth_get_radiosw();
2664         if (status < 0)
2665                 return;
2666         rfkill_force_state(tpacpi_bluetooth_rfkill, status);
2667 }
2668
2669 static int bluetooth_set_radiosw(int radio_on, int update_rfk)
2670 {
2671         int status;
2672
2673         if (!tp_features.bluetooth)
2674                 return -ENODEV;
2675
2676         /* WLSW overrides bluetooth in firmware/hardware, but there is no
2677          * reason to risk weird behaviour. */
2678         if (tp_features.hotkey_wlsw && !hotkey_get_wlsw(&status) && !status
2679             && radio_on)
2680                 return -EPERM;
2681
2682         if (!acpi_evalf(hkey_handle, &status, "GBDC", "d"))
2683                 return -EIO;
2684         if (radio_on)
2685                 status |= TP_ACPI_BLUETOOTH_RADIOSSW;
2686         else
2687                 status &= ~TP_ACPI_BLUETOOTH_RADIOSSW;
2688         if (!acpi_evalf(hkey_handle, NULL, "SBDC", "vd", status))
2689                 return -EIO;
2690
2691         if (update_rfk)
2692                 bluetooth_update_rfk();
2693
2694         return 0;
2695 }
2696
2697 /* sysfs bluetooth enable ---------------------------------------------- */
2698 static ssize_t bluetooth_enable_show(struct device *dev,
2699                            struct device_attribute *attr,
2700                            char *buf)
2701 {
2702         int status;
2703
2704         status = bluetooth_get_radiosw();
2705         if (status < 0)
2706                 return status;
2707
2708         return snprintf(buf, PAGE_SIZE, "%d\n",
2709                         (status == RFKILL_STATE_UNBLOCKED) ? 1 : 0);
2710 }
2711
2712 static ssize_t bluetooth_enable_store(struct device *dev,
2713                             struct device_attribute *attr,
2714                             const char *buf, size_t count)
2715 {
2716         unsigned long t;
2717         int res;
2718
2719         if (parse_strtoul(buf, 1, &t))
2720                 return -EINVAL;
2721
2722         res = bluetooth_set_radiosw(t, 1);
2723
2724         return (res) ? res : count;
2725 }
2726
2727 static struct device_attribute dev_attr_bluetooth_enable =
2728         __ATTR(bluetooth_enable, S_IWUSR | S_IRUGO,
2729                 bluetooth_enable_show, bluetooth_enable_store);
2730
2731 /* --------------------------------------------------------------------- */
2732
2733 static struct attribute *bluetooth_attributes[] = {
2734         &dev_attr_bluetooth_enable.attr,
2735         NULL
2736 };
2737
2738 static const struct attribute_group bluetooth_attr_group = {
2739         .attrs = bluetooth_attributes,
2740 };
2741
2742 static int tpacpi_bluetooth_rfk_get(void *data, enum rfkill_state *state)
2743 {
2744         int bts = bluetooth_get_radiosw();
2745
2746         if (bts < 0)
2747                 return bts;
2748
2749         *state = bts;
2750         return 0;
2751 }
2752
2753 static int tpacpi_bluetooth_rfk_set(void *data, enum rfkill_state state)
2754 {
2755         return bluetooth_set_radiosw((state == RFKILL_STATE_UNBLOCKED), 0);
2756 }
2757
2758 static void bluetooth_exit(void)
2759 {
2760         if (tpacpi_bluetooth_rfkill)
2761                 rfkill_unregister(tpacpi_bluetooth_rfkill);
2762
2763         sysfs_remove_group(&tpacpi_pdev->dev.kobj,
2764                         &bluetooth_attr_group);
2765 }
2766
2767 static int __init bluetooth_init(struct ibm_init_struct *iibm)
2768 {
2769         int res;
2770         int status = 0;
2771
2772         vdbg_printk(TPACPI_DBG_INIT, "initializing bluetooth subdriver\n");
2773
2774         TPACPI_ACPIHANDLE_INIT(hkey);
2775
2776         /* bluetooth not supported on 570, 600e/x, 770e, 770x, A21e, A2xm/p,
2777            G4x, R30, R31, R40e, R50e, T20-22, X20-21 */
2778         tp_features.bluetooth = hkey_handle &&
2779             acpi_evalf(hkey_handle, &status, "GBDC", "qd");
2780
2781         vdbg_printk(TPACPI_DBG_INIT, "bluetooth is %s, status 0x%02x\n",
2782                 str_supported(tp_features.bluetooth),
2783                 status);
2784
2785         if (tp_features.bluetooth &&
2786             !(status & TP_ACPI_BLUETOOTH_HWPRESENT)) {
2787                 /* no bluetooth hardware present in system */
2788                 tp_features.bluetooth = 0;
2789                 dbg_printk(TPACPI_DBG_INIT,
2790                            "bluetooth hardware not installed\n");
2791         }
2792
2793         if (!tp_features.bluetooth)
2794                 return 1;
2795
2796         res = sysfs_create_group(&tpacpi_pdev->dev.kobj,
2797                                 &bluetooth_attr_group);
2798         if (res)
2799                 return res;
2800
2801         res = tpacpi_new_rfkill(TPACPI_RFK_BLUETOOTH_SW_ID,
2802                                 &tpacpi_bluetooth_rfkill,
2803                                 RFKILL_TYPE_BLUETOOTH,
2804                                 "tpacpi_bluetooth_sw",
2805                                 tpacpi_bluetooth_rfk_set,
2806                                 tpacpi_bluetooth_rfk_get);
2807         if (res) {
2808                 bluetooth_exit();
2809                 return res;
2810         }
2811
2812         return 0;
2813 }
2814
2815 /* procfs -------------------------------------------------------------- */
2816 static int bluetooth_read(char *p)
2817 {
2818         int len = 0;
2819         int status = bluetooth_get_radiosw();
2820
2821         if (!tp_features.bluetooth)
2822                 len += sprintf(p + len, "status:\t\tnot supported\n");
2823         else {
2824                 len += sprintf(p + len, "status:\t\t%s\n",
2825                                 (status == RFKILL_STATE_UNBLOCKED) ?
2826                                         "enabled" : "disabled");
2827                 len += sprintf(p + len, "commands:\tenable, disable\n");
2828         }
2829
2830         return len;
2831 }
2832
2833 static int bluetooth_write(char *buf)
2834 {
2835         char *cmd;
2836
2837         if (!tp_features.bluetooth)
2838                 return -ENODEV;
2839
2840         while ((cmd = next_cmd(&buf))) {
2841                 if (strlencmp(cmd, "enable") == 0) {
2842                         bluetooth_set_radiosw(1, 1);
2843                 } else if (strlencmp(cmd, "disable") == 0) {
2844                         bluetooth_set_radiosw(0, 1);
2845                 } else
2846                         return -EINVAL;
2847         }
2848
2849         return 0;
2850 }
2851
2852 static struct ibm_struct bluetooth_driver_data = {
2853         .name = "bluetooth",
2854         .read = bluetooth_read,
2855         .write = bluetooth_write,
2856         .exit = bluetooth_exit,
2857 };
2858
2859 /*************************************************************************
2860  * Wan subdriver
2861  */
2862
2863 enum {
2864         /* ACPI GWAN/SWAN bits */
2865         TP_ACPI_WANCARD_HWPRESENT       = 0x01, /* Wan hw available */
2866         TP_ACPI_WANCARD_RADIOSSW        = 0x02, /* Wan radio enabled */
2867         TP_ACPI_WANCARD_UNK             = 0x04, /* unknown function */
2868 };
2869
2870 static struct rfkill *tpacpi_wan_rfkill;
2871
2872 static int wan_get_radiosw(void)
2873 {
2874         int status;
2875
2876         if (!tp_features.wan)
2877                 return -ENODEV;
2878
2879         /* WLSW overrides WWAN in firmware/hardware, reflect that */
2880         if (tp_features.hotkey_wlsw && !hotkey_get_wlsw(&status) && !status)
2881                 return RFKILL_STATE_HARD_BLOCKED;
2882
2883         if (!acpi_evalf(hkey_handle, &status, "GWAN", "d"))
2884                 return -EIO;
2885
2886         return ((status & TP_ACPI_WANCARD_RADIOSSW) != 0) ?
2887                 RFKILL_STATE_UNBLOCKED : RFKILL_STATE_SOFT_BLOCKED;
2888 }
2889
2890 static void wan_update_rfk(void)
2891 {
2892         int status;
2893
2894         if (!tpacpi_wan_rfkill)
2895                 return;
2896
2897         status = wan_get_radiosw();
2898         if (status < 0)
2899                 return;
2900         rfkill_force_state(tpacpi_wan_rfkill, status);
2901 }
2902
2903 static int wan_set_radiosw(int radio_on, int update_rfk)
2904 {
2905         int status;
2906
2907         if (!tp_features.wan)
2908                 return -ENODEV;
2909
2910         /* WLSW overrides bluetooth in firmware/hardware, but there is no
2911          * reason to risk weird behaviour. */
2912         if (tp_features.hotkey_wlsw && !hotkey_get_wlsw(&status) && !status
2913             && radio_on)
2914                 return -EPERM;
2915
2916         if (!acpi_evalf(hkey_handle, &status, "GWAN", "d"))
2917                 return -EIO;
2918         if (radio_on)
2919                 status |= TP_ACPI_WANCARD_RADIOSSW;
2920         else
2921                 status &= ~TP_ACPI_WANCARD_RADIOSSW;
2922         if (!acpi_evalf(hkey_handle, NULL, "SWAN", "vd", status))
2923                 return -EIO;
2924
2925         if (update_rfk)
2926                 wan_update_rfk();
2927
2928         return 0;
2929 }
2930
2931 /* sysfs wan enable ---------------------------------------------------- */
2932 static ssize_t wan_enable_show(struct device *dev,
2933                            struct device_attribute *attr,
2934                            char *buf)
2935 {
2936         int status;
2937
2938         status = wan_get_radiosw();
2939         if (status < 0)
2940                 return status;
2941
2942         return snprintf(buf, PAGE_SIZE, "%d\n",
2943                         (status == RFKILL_STATE_UNBLOCKED) ? 1 : 0);
2944 }
2945
2946 static ssize_t wan_enable_store(struct device *dev,
2947                             struct device_attribute *attr,
2948                             const char *buf, size_t count)
2949 {
2950         unsigned long t;
2951         int res;
2952
2953         if (parse_strtoul(buf, 1, &t))
2954                 return -EINVAL;
2955
2956         res = wan_set_radiosw(t, 1);
2957
2958         return (res) ? res : count;
2959 }
2960
2961 static struct device_attribute dev_attr_wan_enable =
2962         __ATTR(wwan_enable, S_IWUSR | S_IRUGO,
2963                 wan_enable_show, wan_enable_store);
2964
2965 /* --------------------------------------------------------------------- */
2966
2967 static struct attribute *wan_attributes[] = {
2968         &dev_attr_wan_enable.attr,
2969         NULL
2970 };
2971
2972 static const struct attribute_group wan_attr_group = {
2973         .attrs = wan_attributes,
2974 };
2975
2976 static int tpacpi_wan_rfk_get(void *data, enum rfkill_state *state)
2977 {
2978         int wans = wan_get_radiosw();
2979
2980         if (wans < 0)
2981                 return wans;
2982
2983         *state = wans;
2984         return 0;
2985 }
2986
2987 static int tpacpi_wan_rfk_set(void *data, enum rfkill_state state)
2988 {
2989         return wan_set_radiosw((state == RFKILL_STATE_UNBLOCKED), 0);
2990 }
2991
2992 static void wan_exit(void)
2993 {
2994         if (tpacpi_wan_rfkill)
2995                 rfkill_unregister(tpacpi_wan_rfkill);
2996
2997         sysfs_remove_group(&tpacpi_pdev->dev.kobj,
2998                 &wan_attr_group);
2999 }
3000
3001 static int __init wan_init(struct ibm_init_struct *iibm)
3002 {
3003         int res;
3004         int status = 0;
3005
3006         vdbg_printk(TPACPI_DBG_INIT, "initializing wan subdriver\n");
3007
3008         TPACPI_ACPIHANDLE_INIT(hkey);
3009
3010         tp_features.wan = hkey_handle &&
3011             acpi_evalf(hkey_handle, &status, "GWAN", "qd");
3012
3013         vdbg_printk(TPACPI_DBG_INIT, "wan is %s, status 0x%02x\n",
3014                 str_supported(tp_features.wan),
3015                 status);
3016
3017         if (tp_features.wan &&
3018             !(status & TP_ACPI_WANCARD_HWPRESENT)) {
3019                 /* no wan hardware present in system */
3020                 tp_features.wan = 0;
3021                 dbg_printk(TPACPI_DBG_INIT,
3022                            "wan hardware not installed\n");
3023         }
3024
3025         if (!tp_features.wan)
3026                 return 1;
3027
3028         res = sysfs_create_group(&tpacpi_pdev->dev.kobj,
3029                                 &wan_attr_group);
3030         if (res)
3031                 return res;
3032
3033         res = tpacpi_new_rfkill(TPACPI_RFK_WWAN_SW_ID,
3034                                 &tpacpi_wan_rfkill,
3035                                 RFKILL_TYPE_WWAN,
3036                                 "tpacpi_wwan_sw",
3037                                 tpacpi_wan_rfk_set,
3038                                 tpacpi_wan_rfk_get);
3039         if (res) {
3040                 wan_exit();
3041                 return res;
3042         }
3043
3044         return 0;
3045 }
3046
3047 /* procfs -------------------------------------------------------------- */
3048 static int wan_read(char *p)
3049 {
3050         int len = 0;
3051         int status = wan_get_radiosw();
3052
3053         if (!tp_features.wan)
3054                 len += sprintf(p + len, "status:\t\tnot supported\n");
3055         else {
3056                 len += sprintf(p + len, "status:\t\t%s\n",
3057                                 (status == RFKILL_STATE_UNBLOCKED) ?
3058                                         "enabled" : "disabled");
3059                 len += sprintf(p + len, "commands:\tenable, disable\n");
3060         }
3061
3062         return len;
3063 }
3064
3065 static int wan_write(char *buf)
3066 {
3067         char *cmd;
3068
3069         if (!tp_features.wan)
3070                 return -ENODEV;
3071
3072         while ((cmd = next_cmd(&buf))) {
3073                 if (strlencmp(cmd, "enable") == 0) {
3074                         wan_set_radiosw(1, 1);
3075                 } else if (strlencmp(cmd, "disable") == 0) {
3076                         wan_set_radiosw(0, 1);
3077                 } else
3078                         return -EINVAL;
3079         }
3080
3081         return 0;
3082 }
3083
3084 static struct ibm_struct wan_driver_data = {
3085         .name = "wan",
3086         .read = wan_read,
3087         .write = wan_write,
3088         .exit = wan_exit,
3089 };
3090
3091 /*************************************************************************
3092  * Video subdriver
3093  */
3094
3095 #ifdef CONFIG_THINKPAD_ACPI_VIDEO
3096
3097 enum video_access_mode {
3098         TPACPI_VIDEO_NONE = 0,
3099         TPACPI_VIDEO_570,       /* 570 */
3100         TPACPI_VIDEO_770,       /* 600e/x, 770e, 770x */
3101         TPACPI_VIDEO_NEW,       /* all others */
3102 };
3103
3104 enum {  /* video status flags, based on VIDEO_570 */
3105         TP_ACPI_VIDEO_S_LCD = 0x01,     /* LCD output enabled */
3106         TP_ACPI_VIDEO_S_CRT = 0x02,     /* CRT output enabled */
3107         TP_ACPI_VIDEO_S_DVI = 0x08,     /* DVI output enabled */
3108 };
3109
3110 enum {  /* TPACPI_VIDEO_570 constants */
3111         TP_ACPI_VIDEO_570_PHSCMD = 0x87,        /* unknown magic constant :( */
3112         TP_ACPI_VIDEO_570_PHSMASK = 0x03,       /* PHS bits that map to
3113                                                  * video_status_flags */
3114         TP_ACPI_VIDEO_570_PHS2CMD = 0x8b,       /* unknown magic constant :( */
3115         TP_ACPI_VIDEO_570_PHS2SET = 0x80,       /* unknown magic constant :( */
3116 };
3117
3118 static enum video_access_mode video_supported;
3119 static int video_orig_autosw;
3120
3121 static int video_autosw_get(void);
3122 static int video_autosw_set(int enable);
3123
3124 TPACPI_HANDLE(vid2, root, "\\_SB.PCI0.AGPB.VID");       /* G41 */
3125
3126 static int __init video_init(struct ibm_init_struct *iibm)
3127 {
3128         int ivga;
3129
3130         vdbg_printk(TPACPI_DBG_INIT, "initializing video subdriver\n");
3131
3132         TPACPI_ACPIHANDLE_INIT(vid);
3133         TPACPI_ACPIHANDLE_INIT(vid2);
3134
3135         if (vid2_handle && acpi_evalf(NULL, &ivga, "\\IVGA", "d") && ivga)
3136                 /* G41, assume IVGA doesn't change */
3137                 vid_handle = vid2_handle;
3138
3139         if (!vid_handle)
3140                 /* video switching not supported on R30, R31 */
3141                 video_supported = TPACPI_VIDEO_NONE;
3142         else if (acpi_evalf(vid_handle, &video_orig_autosw, "SWIT", "qd"))
3143                 /* 570 */
3144                 video_supported = TPACPI_VIDEO_570;
3145         else if (acpi_evalf(vid_handle, &video_orig_autosw, "^VADL", "qd"))
3146                 /* 600e/x, 770e, 770x */
3147                 video_supported = TPACPI_VIDEO_770;
3148         else
3149                 /* all others */
3150                 video_supported = TPACPI_VIDEO_NEW;
3151
3152         vdbg_printk(TPACPI_DBG_INIT, "video is %s, mode %d\n",
3153                 str_supported(video_supported != TPACPI_VIDEO_NONE),
3154                 video_supported);
3155
3156         return (video_supported != TPACPI_VIDEO_NONE)? 0 : 1;
3157 }
3158
3159 static void video_exit(void)
3160 {
3161         dbg_printk(TPACPI_DBG_EXIT,
3162                    "restoring original video autoswitch mode\n");
3163         if (video_autosw_set(video_orig_autosw))
3164                 printk(TPACPI_ERR "error while trying to restore original "
3165                         "video autoswitch mode\n");
3166 }
3167
3168 static int video_outputsw_get(void)
3169 {
3170         int status = 0;
3171         int i;
3172
3173         switch (video_supported) {
3174         case TPACPI_VIDEO_570:
3175                 if (!acpi_evalf(NULL, &i, "\\_SB.PHS", "dd",
3176                                  TP_ACPI_VIDEO_570_PHSCMD))
3177                         return -EIO;
3178                 status = i & TP_ACPI_VIDEO_570_PHSMASK;
3179                 break;
3180         case TPACPI_VIDEO_770:
3181                 if (!acpi_evalf(NULL, &i, "\\VCDL", "d"))
3182                         return -EIO;
3183                 if (i)
3184                         status |= TP_ACPI_VIDEO_S_LCD;
3185                 if (!acpi_evalf(NULL, &i, "\\VCDC", "d"))
3186                         return -EIO;
3187                 if (i)
3188                         status |= TP_ACPI_VIDEO_S_CRT;
3189                 break;
3190         case TPACPI_VIDEO_NEW:
3191                 if (!acpi_evalf(NULL, NULL, "\\VUPS", "vd", 1) ||
3192                     !acpi_evalf(NULL, &i, "\\VCDC", "d"))
3193                         return -EIO;
3194                 if (i)
3195                         status |= TP_ACPI_VIDEO_S_CRT;
3196
3197                 if (!acpi_evalf(NULL, NULL, "\\VUPS", "vd", 0) ||
3198                     !acpi_evalf(NULL, &i, "\\VCDL", "d"))
3199                         return -EIO;
3200                 if (i)
3201                         status |= TP_ACPI_VIDEO_S_LCD;
3202                 if (!acpi_evalf(NULL, &i, "\\VCDD", "d"))
3203                         return -EIO;
3204                 if (i)
3205                         status |= TP_ACPI_VIDEO_S_DVI;
3206                 break;
3207         default:
3208                 return -ENOSYS;
3209         }
3210
3211         return status;
3212 }
3213
3214 static int video_outputsw_set(int status)
3215 {
3216         int autosw;
3217         int res = 0;
3218
3219         switch (video_supported) {
3220         case TPACPI_VIDEO_570:
3221                 res = acpi_evalf(NULL, NULL,
3222                                  "\\_SB.PHS2", "vdd",
3223                                  TP_ACPI_VIDEO_570_PHS2CMD,
3224                                  status | TP_ACPI_VIDEO_570_PHS2SET);
3225                 break;
3226         case TPACPI_VIDEO_770:
3227                 autosw = video_autosw_get();
3228                 if (autosw < 0)
3229                         return autosw;
3230
3231                 res = video_autosw_set(1);
3232                 if (res)
3233                         return res;
3234                 res = acpi_evalf(vid_handle, NULL,
3235                                  "ASWT", "vdd", status * 0x100, 0);
3236                 if (!autosw && video_autosw_set(autosw)) {
3237                         printk(TPACPI_ERR
3238                                "video auto-switch left enabled due to error\n");
3239                         return -EIO;
3240                 }
3241                 break;
3242         case TPACPI_VIDEO_NEW:
3243                 res = acpi_evalf(NULL, NULL, "\\VUPS", "vd", 0x80) &&
3244                       acpi_evalf(NULL, NULL, "\\VSDS", "vdd", status, 1);
3245                 break;
3246         default:
3247                 return -ENOSYS;
3248         }
3249
3250         return (res)? 0 : -EIO;
3251 }
3252
3253 static int video_autosw_get(void)
3254 {
3255         int autosw = 0;
3256
3257         switch (video_supported) {
3258         case TPACPI_VIDEO_570:
3259                 if (!acpi_evalf(vid_handle, &autosw, "SWIT", "d"))
3260                         return -EIO;
3261                 break;
3262         case TPACPI_VIDEO_770:
3263         case TPACPI_VIDEO_NEW:
3264                 if (!acpi_evalf(vid_handle, &autosw, "^VDEE", "d"))
3265                         return -EIO;
3266                 break;
3267         default:
3268                 return -ENOSYS;
3269         }
3270
3271         return autosw & 1;
3272 }
3273
3274 static int video_autosw_set(int enable)
3275 {
3276         if (!acpi_evalf(vid_handle, NULL, "_DOS", "vd", (enable)? 1 : 0))
3277                 return -EIO;
3278         return 0;
3279 }
3280
3281 static int video_outputsw_cycle(void)
3282 {
3283         int autosw = video_autosw_get();
3284         int res;
3285
3286         if (autosw < 0)
3287                 return autosw;
3288
3289         switch (video_supported) {
3290         case TPACPI_VIDEO_570:
3291                 res = video_autosw_set(1);
3292                 if (res)
3293                         return res;
3294                 res = acpi_evalf(ec_handle, NULL, "_Q16", "v");
3295                 break;
3296         case TPACPI_VIDEO_770:
3297         case TPACPI_VIDEO_NEW:
3298                 res = video_autosw_set(1);
3299                 if (res)
3300                         return res;
3301                 res = acpi_evalf(vid_handle, NULL, "VSWT", "v");
3302                 break;
3303         default:
3304                 return -ENOSYS;
3305         }
3306         if (!autosw && video_autosw_set(autosw)) {
3307                 printk(TPACPI_ERR
3308                        "video auto-switch left enabled due to error\n");
3309                 return -EIO;
3310         }
3311
3312         return (res)? 0 : -EIO;
3313 }
3314
3315 static int video_expand_toggle(void)
3316 {
3317         switch (video_supported) {
3318         case TPACPI_VIDEO_570:
3319                 return acpi_evalf(ec_handle, NULL, "_Q17", "v")?
3320                         0 : -EIO;
3321         case TPACPI_VIDEO_770:
3322                 return acpi_evalf(vid_handle, NULL, "VEXP", "v")?
3323                         0 : -EIO;
3324         case TPACPI_VIDEO_NEW:
3325                 return acpi_evalf(NULL, NULL, "\\VEXP", "v")?
3326                         0 : -EIO;
3327         default:
3328                 return -ENOSYS;
3329         }
3330         /* not reached */
3331 }
3332
3333 static int video_read(char *p)
3334 {
3335         int status, autosw;
3336         int len = 0;
3337
3338         if (video_supported == TPACPI_VIDEO_NONE) {
3339                 len += sprintf(p + len, "status:\t\tnot supported\n");
3340                 return len;
3341         }
3342
3343         status = video_outputsw_get();
3344         if (status < 0)
3345                 return status;
3346
3347         autosw = video_autosw_get();
3348         if (autosw < 0)
3349                 return autosw;
3350
3351         len += sprintf(p + len, "status:\t\tsupported\n");
3352         len += sprintf(p + len, "lcd:\t\t%s\n", enabled(status, 0));
3353         len += sprintf(p + len, "crt:\t\t%s\n", enabled(status, 1));
3354         if (video_supported == TPACPI_VIDEO_NEW)
3355                 len += sprintf(p + len, "dvi:\t\t%s\n", enabled(status, 3));
3356         len += sprintf(p + len, "auto:\t\t%s\n", enabled(autosw, 0));
3357         len += sprintf(p + len, "commands:\tlcd_enable, lcd_disable\n");
3358         len += sprintf(p + len, "commands:\tcrt_enable, crt_disable\n");
3359         if (video_supported == TPACPI_VIDEO_NEW)
3360                 len += sprintf(p + len, "commands:\tdvi_enable, dvi_disable\n");
3361         len += sprintf(p + len, "commands:\tauto_enable, auto_disable\n");
3362         len += sprintf(p + len, "commands:\tvideo_switch, expand_toggle\n");
3363
3364         return len;
3365 }
3366
3367 static int video_write(char *buf)
3368 {
3369         char *cmd;
3370         int enable, disable, status;
3371         int res;
3372
3373         if (video_supported == TPACPI_VIDEO_NONE)
3374                 return -ENODEV;
3375
3376         enable = 0;
3377         disable = 0;
3378
3379         while ((cmd = next_cmd(&buf))) {
3380                 if (strlencmp(cmd, "lcd_enable") == 0) {
3381                         enable |= TP_ACPI_VIDEO_S_LCD;
3382                 } else if (strlencmp(cmd, "lcd_disable") == 0) {
3383                         disable |= TP_ACPI_VIDEO_S_LCD;
3384                 } else if (strlencmp(cmd, "crt_enable") == 0) {
3385                         enable |= TP_ACPI_VIDEO_S_CRT;
3386                 } else if (strlencmp(cmd, "crt_disable") == 0) {
3387                         disable |= TP_ACPI_VIDEO_S_CRT;
3388                 } else if (video_supported == TPACPI_VIDEO_NEW &&
3389                            strlencmp(cmd, "dvi_enable") == 0) {
3390                         enable |= TP_ACPI_VIDEO_S_DVI;
3391                 } else if (video_supported == TPACPI_VIDEO_NEW &&
3392                            strlencmp(cmd, "dvi_disable") == 0) {
3393                         disable |= TP_ACPI_VIDEO_S_DVI;
3394                 } else if (strlencmp(cmd, "auto_enable") == 0) {
3395                         res = video_autosw_set(1);
3396                         if (res)
3397                                 return res;
3398                 } else if (strlencmp(cmd, "auto_disable") == 0) {
3399                         res = video_autosw_set(0);
3400                         if (res)
3401                                 return res;
3402                 } else if (strlencmp(cmd, "video_switch") == 0) {
3403                         res = video_outputsw_cycle();
3404                         if (res)
3405                                 return res;
3406                 } else if (strlencmp(cmd, "expand_toggle") == 0) {
3407                         res = video_expand_toggle();
3408                         if (res)
3409                                 return res;
3410                 } else
3411                         return -EINVAL;
3412         }
3413
3414         if (enable || disable) {
3415                 status = video_outputsw_get();
3416                 if (status < 0)
3417                         return status;
3418                 res = video_outputsw_set((status & ~disable) | enable);
3419                 if (res)
3420                         return res;
3421         }
3422
3423         return 0;
3424 }
3425
3426 static struct ibm_struct video_driver_data = {
3427         .name = "video",
3428         .read = video_read,
3429         .write = video_write,
3430         .exit = video_exit,
3431 };
3432
3433 #endif /* CONFIG_THINKPAD_ACPI_VIDEO */
3434
3435 /*************************************************************************
3436  * Light (thinklight) subdriver
3437  */
3438
3439 TPACPI_HANDLE(lght, root, "\\LGHT");    /* A21e, A2xm/p, T20-22, X20-21 */
3440 TPACPI_HANDLE(ledb, ec, "LEDB");                /* G4x */
3441
3442 static int light_get_status(void)
3443 {
3444         int status = 0;
3445
3446         if (tp_features.light_status) {
3447                 if (!acpi_evalf(ec_handle, &status, "KBLT", "d"))
3448                         return -EIO;
3449                 return (!!status);
3450         }
3451
3452         return -ENXIO;
3453 }
3454
3455 static int light_set_status(int status)
3456 {
3457         int rc;
3458
3459         if (tp_features.light) {
3460                 if (cmos_handle) {
3461                         rc = acpi_evalf(cmos_handle, NULL, NULL, "vd",
3462                                         (status)?
3463                                                 TP_CMOS_THINKLIGHT_ON :
3464                                                 TP_CMOS_THINKLIGHT_OFF);
3465                 } else {
3466                         rc = acpi_evalf(lght_handle, NULL, NULL, "vd",
3467                                         (status)? 1 : 0);
3468                 }
3469                 return (rc)? 0 : -EIO;
3470         }
3471
3472         return -ENXIO;
3473 }
3474
3475 static void light_set_status_worker(struct work_struct *work)
3476 {
3477         struct tpacpi_led_classdev *data =
3478                         container_of(work, struct tpacpi_led_classdev, work);
3479
3480         if (likely(tpacpi_lifecycle == TPACPI_LIFE_RUNNING))
3481                 light_set_status((data->new_brightness != LED_OFF));
3482 }
3483
3484 static void light_sysfs_set(struct led_classdev *led_cdev,
3485                         enum led_brightness brightness)
3486 {
3487         struct tpacpi_led_classdev *data =
3488                 container_of(led_cdev,
3489                              struct tpacpi_led_classdev,
3490                              led_classdev);
3491         data->new_brightness = brightness;
3492         queue_work(tpacpi_wq, &data->work);
3493 }
3494
3495 static enum led_brightness light_sysfs_get(struct led_classdev *led_cdev)
3496 {
3497         return (light_get_status() == 1)? LED_FULL : LED_OFF;
3498 }
3499
3500 static struct tpacpi_led_classdev tpacpi_led_thinklight = {
3501         .led_classdev = {
3502                 .name           = "tpacpi::thinklight",
3503                 .brightness_set = &light_sysfs_set,
3504                 .brightness_get = &light_sysfs_get,
3505         }
3506 };
3507
3508 static int __init light_init(struct ibm_init_struct *iibm)
3509 {
3510         int rc;
3511
3512         vdbg_printk(TPACPI_DBG_INIT, "initializing light subdriver\n");
3513
3514         TPACPI_ACPIHANDLE_INIT(ledb);
3515         TPACPI_ACPIHANDLE_INIT(lght);
3516         TPACPI_ACPIHANDLE_INIT(cmos);
3517         INIT_WORK(&tpacpi_led_thinklight.work, light_set_status_worker);
3518
3519         /* light not supported on 570, 600e/x, 770e, 770x, G4x, R30, R31 */
3520         tp_features.light = (cmos_handle || lght_handle) && !ledb_handle;
3521
3522         if (tp_features.light)
3523                 /* light status not supported on
3524                    570, 600e/x, 770e, 770x, G4x, R30, R31, R32, X20 */
3525                 tp_features.light_status =
3526                         acpi_evalf(ec_handle, NULL, "KBLT", "qv");
3527
3528         vdbg_printk(TPACPI_DBG_INIT, "light is %s, light status is %s\n",
3529                 str_supported(tp_features.light),
3530                 str_supported(tp_features.light_status));
3531
3532         if (!tp_features.light)
3533                 return 1;
3534
3535         rc = led_classdev_register(&tpacpi_pdev->dev,
3536                                    &tpacpi_led_thinklight.led_classdev);
3537
3538         if (rc < 0) {
3539                 tp_features.light = 0;
3540                 tp_features.light_status = 0;
3541         } else  {
3542                 rc = 0;
3543         }
3544
3545         return rc;
3546 }
3547
3548 static void light_exit(void)
3549 {
3550         led_classdev_unregister(&tpacpi_led_thinklight.led_classdev);
3551         if (work_pending(&tpacpi_led_thinklight.work))
3552                 flush_workqueue(tpacpi_wq);
3553 }
3554
3555 static int light_read(char *p)
3556 {
3557         int len = 0;
3558         int status;
3559
3560         if (!tp_features.light) {
3561                 len += sprintf(p + len, "status:\t\tnot supported\n");
3562         } else if (!tp_features.light_status) {
3563                 len += sprintf(p + len, "status:\t\tunknown\n");
3564                 len += sprintf(p + len, "commands:\ton, off\n");
3565         } else {
3566                 status = light_get_status();
3567                 if (status < 0)
3568                         return status;
3569                 len += sprintf(p + len, "status:\t\t%s\n", onoff(status, 0));
3570                 len += sprintf(p + len, "commands:\ton, off\n");
3571         }
3572
3573         return len;
3574 }
3575
3576 static int light_write(char *buf)
3577 {
3578         char *cmd;
3579         int newstatus = 0;
3580
3581         if (!tp_features.light)
3582                 return -ENODEV;
3583
3584         while ((cmd = next_cmd(&buf))) {
3585                 if (strlencmp(cmd, "on") == 0) {
3586                         newstatus = 1;
3587                 } else if (strlencmp(cmd, "off") == 0) {
3588                         newstatus = 0;
3589                 } else
3590                         return -EINVAL;
3591         }
3592
3593         return light_set_status(newstatus);
3594 }
3595
3596 static struct ibm_struct light_driver_data = {
3597         .name = "light",
3598         .read = light_read,
3599         .write = light_write,
3600         .exit = light_exit,
3601 };
3602
3603 /*************************************************************************
3604  * Dock subdriver
3605  */
3606
3607 #ifdef CONFIG_THINKPAD_ACPI_DOCK
3608
3609 static void dock_notify(struct ibm_struct *ibm, u32 event);
3610 static int dock_read(char *p);
3611 static int dock_write(char *buf);
3612
3613 TPACPI_HANDLE(dock, root, "\\_SB.GDCK", /* X30, X31, X40 */
3614            "\\_SB.PCI0.DOCK",   /* 600e/x,770e,770x,A2xm/p,T20-22,X20-21 */
3615            "\\_SB.PCI0.PCI1.DOCK",      /* all others */
3616            "\\_SB.PCI.ISA.SLCE",        /* 570 */
3617     );                          /* A21e,G4x,R30,R31,R32,R40,R40e,R50e */
3618
3619 /* don't list other alternatives as we install a notify handler on the 570 */
3620 TPACPI_HANDLE(pci, root, "\\_SB.PCI");  /* 570 */
3621
3622 static const struct acpi_device_id ibm_pci_device_ids[] = {
3623         {PCI_ROOT_HID_STRING, 0},
3624         {"", 0},
3625 };
3626
3627 static struct tp_acpi_drv_struct ibm_dock_acpidriver[2] = {
3628         {
3629          .notify = dock_notify,
3630          .handle = &dock_handle,
3631          .type = ACPI_SYSTEM_NOTIFY,
3632         },
3633         {
3634         /* THIS ONE MUST NEVER BE USED FOR DRIVER AUTOLOADING.
3635          * We just use it to get notifications of dock hotplug
3636          * in very old thinkpads */
3637          .hid = ibm_pci_device_ids,
3638          .notify = dock_notify,
3639          .handle = &pci_handle,
3640          .type = ACPI_SYSTEM_NOTIFY,
3641         },
3642 };
3643
3644 static struct ibm_struct dock_driver_data[2] = {
3645         {
3646          .name = "dock",
3647          .read = dock_read,
3648          .write = dock_write,
3649          .acpi = &ibm_dock_acpidriver[0],
3650         },
3651         {
3652          .name = "dock",
3653          .acpi = &ibm_dock_acpidriver[1],
3654         },
3655 };
3656
3657 #define dock_docked() (_sta(dock_handle) & 1)
3658
3659 static int __init dock_init(struct ibm_init_struct *iibm)
3660 {
3661         vdbg_printk(TPACPI_DBG_INIT, "initializing dock subdriver\n");
3662
3663         TPACPI_ACPIHANDLE_INIT(dock);
3664
3665         vdbg_printk(TPACPI_DBG_INIT, "dock is %s\n",
3666                 str_supported(dock_handle != NULL));
3667
3668         return (dock_handle)? 0 : 1;
3669 }
3670
3671 static int __init dock_init2(struct ibm_init_struct *iibm)
3672 {
3673         int dock2_needed;
3674
3675         vdbg_printk(TPACPI_DBG_INIT, "initializing dock subdriver part 2\n");
3676
3677         if (dock_driver_data[0].flags.acpi_driver_registered &&
3678             dock_driver_data[0].flags.acpi_notify_installed) {
3679                 TPACPI_ACPIHANDLE_INIT(pci);
3680                 dock2_needed = (pci_handle != NULL);
3681                 vdbg_printk(TPACPI_DBG_INIT,
3682                             "dock PCI handler for the TP 570 is %s\n",
3683                             str_supported(dock2_needed));
3684         } else {
3685                 vdbg_printk(TPACPI_DBG_INIT,
3686                 "dock subdriver part 2 not required\n");
3687                 dock2_needed = 0;
3688         }
3689
3690         return (dock2_needed)? 0 : 1;
3691 }
3692
3693 static void dock_notify(struct ibm_struct *ibm, u32 event)
3694 {
3695         int docked = dock_docked();
3696         int pci = ibm->acpi->hid && ibm->acpi->device &&
3697                 acpi_match_device_ids(ibm->acpi->device, ibm_pci_device_ids);
3698         int data;
3699
3700         if (event == 1 && !pci) /* 570 */
3701                 data = 1;       /* button */
3702         else if (event == 1 && pci)     /* 570 */
3703                 data = 3;       /* dock */
3704         else if (event == 3 && docked)
3705                 data = 1;       /* button */
3706         else if (event == 3 && !docked)
3707                 data = 2;       /* undock */
3708         else if (event == 0 && docked)
3709                 data = 3;       /* dock */
3710         else {
3711                 printk(TPACPI_ERR "unknown dock event %d, status %d\n",
3712                        event, _sta(dock_handle));
3713                 data = 0;       /* unknown */
3714         }
3715         acpi_bus_generate_proc_event(ibm->acpi->device, event, data);
3716         acpi_bus_generate_netlink_event(ibm->acpi->device->pnp.device_class,
3717                                           ibm->acpi->device->dev.bus_id,
3718                                           event, data);
3719 }
3720
3721 static int dock_read(char *p)
3722 {
3723         int len = 0;
3724         int docked = dock_docked();
3725
3726         if (!dock_handle)
3727                 len += sprintf(p + len, "status:\t\tnot supported\n");
3728         else if (!docked)
3729                 len += sprintf(p + len, "status:\t\tundocked\n");
3730         else {
3731                 len += sprintf(p + len, "status:\t\tdocked\n");
3732                 len += sprintf(p + len, "commands:\tdock, undock\n");
3733         }
3734
3735         return len;
3736 }
3737
3738 static int dock_write(char *buf)
3739 {
3740         char *cmd;
3741
3742         if (!dock_docked())
3743                 return -ENODEV;
3744
3745         while ((cmd = next_cmd(&buf))) {
3746                 if (strlencmp(cmd, "undock") == 0) {
3747                         if (!acpi_evalf(dock_handle, NULL, "_DCK", "vd", 0) ||
3748                             !acpi_evalf(dock_handle, NULL, "_EJ0", "vd", 1))
3749                                 return -EIO;
3750                 } else if (strlencmp(cmd, "dock") == 0) {
3751                         if (!acpi_evalf(dock_handle, NULL, "_DCK", "vd", 1))
3752                                 return -EIO;
3753                 } else
3754                         return -EINVAL;
3755         }
3756
3757         return 0;
3758 }
3759
3760 #endif /* CONFIG_THINKPAD_ACPI_DOCK */
3761
3762 /*************************************************************************
3763  * Bay subdriver
3764  */
3765
3766 #ifdef CONFIG_THINKPAD_ACPI_BAY
3767
3768 TPACPI_HANDLE(bay, root, "\\_SB.PCI.IDE.SECN.MAST",     /* 570 */
3769            "\\_SB.PCI0.IDE0.IDES.IDSM", /* 600e/x, 770e, 770x */
3770            "\\_SB.PCI0.SATA.SCND.MSTR", /* T60, X60, Z60 */
3771            "\\_SB.PCI0.IDE0.SCND.MSTR", /* all others */
3772            );                           /* A21e, R30, R31 */
3773 TPACPI_HANDLE(bay_ej, bay, "_EJ3",      /* 600e/x, A2xm/p, A3x */
3774            "_EJ0",              /* all others */
3775            );                   /* 570,A21e,G4x,R30,R31,R32,R40e,R50e */
3776 TPACPI_HANDLE(bay2, root, "\\_SB.PCI0.IDE0.PRIM.SLAV",  /* A3x, R32 */
3777            "\\_SB.PCI0.IDE0.IDEP.IDPS", /* 600e/x, 770e, 770x */
3778            );                           /* all others */
3779 TPACPI_HANDLE(bay2_ej, bay2, "_EJ3",    /* 600e/x, 770e, A3x */
3780            "_EJ0",                      /* 770x */
3781            );                           /* all others */
3782
3783 static int __init bay_init(struct ibm_init_struct *iibm)
3784 {
3785         vdbg_printk(TPACPI_DBG_INIT, "initializing bay subdriver\n");
3786
3787         TPACPI_ACPIHANDLE_INIT(bay);
3788         if (bay_handle)
3789                 TPACPI_ACPIHANDLE_INIT(bay_ej);
3790         TPACPI_ACPIHANDLE_INIT(bay2);
3791         if (bay2_handle)
3792                 TPACPI_ACPIHANDLE_INIT(bay2_ej);
3793
3794         tp_features.bay_status = bay_handle &&
3795                 acpi_evalf(bay_handle, NULL, "_STA", "qv");
3796         tp_features.bay_status2 = bay2_handle &&
3797                 acpi_evalf(bay2_handle, NULL, "_STA", "qv");
3798
3799         tp_features.bay_eject = bay_handle && bay_ej_handle &&
3800                 (strlencmp(bay_ej_path, "_EJ0") == 0 || experimental);
3801         tp_features.bay_eject2 = bay2_handle && bay2_ej_handle &&
3802                 (strlencmp(bay2_ej_path, "_EJ0") == 0 || experimental);
3803
3804         vdbg_printk(TPACPI_DBG_INIT,
3805                 "bay 1: status %s, eject %s; bay 2: status %s, eject %s\n",
3806                 str_supported(tp_features.bay_status),
3807                 str_supported(tp_features.bay_eject),
3808                 str_supported(tp_features.bay_status2),
3809                 str_supported(tp_features.bay_eject2));
3810
3811         return (tp_features.bay_status || tp_features.bay_eject ||
3812                 tp_features.bay_status2 || tp_features.bay_eject2)? 0 : 1;
3813 }
3814
3815 static void bay_notify(struct ibm_struct *ibm, u32 event)
3816 {
3817         acpi_bus_generate_proc_event(ibm->acpi->device, event, 0);
3818         acpi_bus_generate_netlink_event(ibm->acpi->device->pnp.device_class,
3819                                           ibm->acpi->device->dev.bus_id,
3820                                           event, 0);
3821 }
3822
3823 #define bay_occupied(b) (_sta(b##_handle) & 1)
3824
3825 static int bay_read(char *p)
3826 {
3827         int len = 0;
3828         int occupied = bay_occupied(bay);
3829         int occupied2 = bay_occupied(bay2);
3830         int eject, eject2;
3831
3832         len += sprintf(p + len, "status:\t\t%s\n",
3833                 tp_features.bay_status ?
3834                         (occupied ? "occupied" : "unoccupied") :
3835                                 "not supported");
3836         if (tp_features.bay_status2)
3837                 len += sprintf(p + len, "status2:\t%s\n", occupied2 ?
3838                                "occupied" : "unoccupied");
3839
3840         eject = tp_features.bay_eject && occupied;
3841         eject2 = tp_features.bay_eject2 && occupied2;
3842
3843         if (eject && eject2)
3844                 len += sprintf(p + len, "commands:\teject, eject2\n");
3845         else if (eject)
3846                 len += sprintf(p + len, "commands:\teject\n");
3847         else if (eject2)
3848                 len += sprintf(p + len, "commands:\teject2\n");
3849
3850         return len;
3851 }
3852
3853 static int bay_write(char *buf)
3854 {
3855         char *cmd;
3856
3857         if (!tp_features.bay_eject && !tp_features.bay_eject2)
3858                 return -ENODEV;
3859
3860         while ((cmd = next_cmd(&buf))) {
3861                 if (tp_features.bay_eject && strlencmp(cmd, "eject") == 0) {
3862                         if (!acpi_evalf(bay_ej_handle, NULL, NULL, "vd", 1))
3863                                 return -EIO;
3864                 } else if (tp_features.bay_eject2 &&
3865                            strlencmp(cmd, "eject2") == 0) {
3866                         if (!acpi_evalf(bay2_ej_handle, NULL, NULL, "vd", 1))
3867                                 return -EIO;
3868                 } else
3869                         return -EINVAL;
3870         }
3871
3872         return 0;
3873 }
3874
3875 static struct tp_acpi_drv_struct ibm_bay_acpidriver = {
3876         .notify = bay_notify,
3877         .handle = &bay_handle,
3878         .type = ACPI_SYSTEM_NOTIFY,
3879 };
3880
3881 static struct ibm_struct bay_driver_data = {
3882         .name = "bay",
3883         .read = bay_read,
3884         .write = bay_write,
3885         .acpi = &ibm_bay_acpidriver,
3886 };
3887
3888 #endif /* CONFIG_THINKPAD_ACPI_BAY */
3889
3890 /*************************************************************************
3891  * CMOS subdriver
3892  */
3893
3894 /* sysfs cmos_command -------------------------------------------------- */
3895 static ssize_t cmos_command_store(struct device *dev,
3896                             struct device_attribute *attr,
3897                             const char *buf, size_t count)
3898 {
3899         unsigned long cmos_cmd;
3900         int res;
3901
3902         if (parse_strtoul(buf, 21, &cmos_cmd))
3903                 return -EINVAL;
3904
3905         res = issue_thinkpad_cmos_command(cmos_cmd);
3906         return (res)? res : count;
3907 }
3908
3909 static struct device_attribute dev_attr_cmos_command =
3910         __ATTR(cmos_command, S_IWUSR, NULL, cmos_command_store);
3911
3912 /* --------------------------------------------------------------------- */
3913
3914 static int __init cmos_init(struct ibm_init_struct *iibm)
3915 {
3916         int res;
3917
3918         vdbg_printk(TPACPI_DBG_INIT,
3919                 "initializing cmos commands subdriver\n");
3920
3921         TPACPI_ACPIHANDLE_INIT(cmos);
3922
3923         vdbg_printk(TPACPI_DBG_INIT, "cmos commands are %s\n",
3924                 str_supported(cmos_handle != NULL));
3925
3926         res = device_create_file(&tpacpi_pdev->dev, &dev_attr_cmos_command);
3927         if (res)
3928                 return res;
3929
3930         return (cmos_handle)? 0 : 1;
3931 }
3932
3933 static void cmos_exit(void)
3934 {
3935         device_remove_file(&tpacpi_pdev->dev, &dev_attr_cmos_command);
3936 }
3937
3938 static int cmos_read(char *p)
3939 {
3940         int len = 0;
3941
3942         /* cmos not supported on 570, 600e/x, 770e, 770x, A21e, A2xm/p,
3943            R30, R31, T20-22, X20-21 */
3944         if (!cmos_handle)
3945                 len += sprintf(p + len, "status:\t\tnot supported\n");
3946         else {
3947                 len += sprintf(p + len, "status:\t\tsupported\n");
3948                 len += sprintf(p + len, "commands:\t<cmd> (<cmd> is 0-21)\n");
3949         }
3950
3951         return len;
3952 }
3953
3954 static int cmos_write(char *buf)
3955 {
3956         char *cmd;
3957         int cmos_cmd, res;
3958
3959         while ((cmd = next_cmd(&buf))) {
3960                 if (sscanf(cmd, "%u", &cmos_cmd) == 1 &&
3961                     cmos_cmd >= 0 && cmos_cmd <= 21) {
3962                         /* cmos_cmd set */
3963                 } else
3964                         return -EINVAL;
3965
3966                 res = issue_thinkpad_cmos_command(cmos_cmd);
3967                 if (res)
3968                         return res;
3969         }
3970
3971         return 0;
3972 }
3973
3974 static struct ibm_struct cmos_driver_data = {
3975         .name = "cmos",
3976         .read = cmos_read,
3977         .write = cmos_write,
3978         .exit = cmos_exit,
3979 };
3980
3981 /*************************************************************************
3982  * LED subdriver
3983  */
3984
3985 enum led_access_mode {
3986         TPACPI_LED_NONE = 0,
3987         TPACPI_LED_570, /* 570 */
3988         TPACPI_LED_OLD, /* 600e/x, 770e, 770x, A21e, A2xm/p, T20-22, X20-21 */
3989         TPACPI_LED_NEW, /* all others */
3990 };
3991
3992 enum {  /* For TPACPI_LED_OLD */
3993         TPACPI_LED_EC_HLCL = 0x0c,      /* EC reg to get led to power on */
3994         TPACPI_LED_EC_HLBL = 0x0d,      /* EC reg to blink a lit led */
3995         TPACPI_LED_EC_HLMS = 0x0e,      /* EC reg to select led to command */
3996 };
3997
3998 enum led_status_t {
3999         TPACPI_LED_OFF = 0,
4000         TPACPI_LED_ON,
4001         TPACPI_LED_BLINK,
4002 };
4003
4004 static enum led_access_mode led_supported;
4005
4006 TPACPI_HANDLE(led, ec, "SLED",  /* 570 */
4007            "SYSL",              /* 600e/x, 770e, 770x, A21e, A2xm/p, */
4008                                 /* T20-22, X20-21 */
4009            "LED",               /* all others */
4010            );                   /* R30, R31 */
4011
4012 #define TPACPI_LED_NUMLEDS 8
4013 static struct tpacpi_led_classdev *tpacpi_leds;
4014 static enum led_status_t tpacpi_led_state_cache[TPACPI_LED_NUMLEDS];
4015 static const char * const tpacpi_led_names[TPACPI_LED_NUMLEDS] = {
4016         /* there's a limit of 19 chars + NULL before 2.6.26 */
4017         "tpacpi::power",
4018         "tpacpi:orange:batt",
4019         "tpacpi:green:batt",
4020         "tpacpi::dock_active",
4021         "tpacpi::bay_active",
4022         "tpacpi::dock_batt",
4023         "tpacpi::unknown_led",
4024         "tpacpi::standby",
4025 };
4026
4027 static int led_get_status(const unsigned int led)
4028 {
4029         int status;
4030         enum led_status_t led_s;
4031
4032         switch (led_supported) {
4033         case TPACPI_LED_570:
4034                 if (!acpi_evalf(ec_handle,
4035                                 &status, "GLED", "dd", 1 << led))
4036                         return -EIO;
4037                 led_s = (status == 0)?
4038                                 TPACPI_LED_OFF :
4039                                 ((status == 1)?
4040                                         TPACPI_LED_ON :
4041                                         TPACPI_LED_BLINK);
4042                 tpacpi_led_state_cache[led] = led_s;
4043                 return led_s;
4044         default:
4045                 return -ENXIO;
4046         }
4047
4048         /* not reached */
4049 }
4050
4051 static int led_set_status(const unsigned int led,
4052                           const enum led_status_t ledstatus)
4053 {
4054         /* off, on, blink. Index is led_status_t */
4055         static const unsigned int led_sled_arg1[] = { 0, 1, 3 };
4056         static const unsigned int led_led_arg1[] = { 0, 0x80, 0xc0 };
4057
4058         int rc = 0;
4059
4060         switch (led_supported) {
4061         case TPACPI_LED_570:
4062                 /* 570 */
4063                 if (led > 7)
4064                         return -EINVAL;
4065                 if (!acpi_evalf(led_handle, NULL, NULL, "vdd",
4066                                 (1 << led), led_sled_arg1[ledstatus]))
4067                         rc = -EIO;
4068                 break;
4069         case TPACPI_LED_OLD:
4070                 /* 600e/x, 770e, 770x, A21e, A2xm/p, T20-22, X20 */
4071                 if (led > 7)
4072                         return -EINVAL;
4073                 rc = ec_write(TPACPI_LED_EC_HLMS, (1 << led));
4074                 if (rc >= 0)
4075                         rc = ec_write(TPACPI_LED_EC_HLBL,
4076                                       (ledstatus == TPACPI_LED_BLINK) << led);
4077                 if (rc >= 0)
4078                         rc = ec_write(TPACPI_LED_EC_HLCL,
4079                                       (ledstatus != TPACPI_LED_OFF) << led);
4080                 break;
4081         case TPACPI_LED_NEW:
4082                 /* all others */
4083                 if (!acpi_evalf(led_handle, NULL, NULL, "vdd",
4084                                 led, led_led_arg1[ledstatus]))
4085                         rc = -EIO;
4086                 break;
4087         default:
4088                 rc = -ENXIO;
4089         }
4090
4091         if (!rc)
4092                 tpacpi_led_state_cache[led] = ledstatus;
4093
4094         return rc;
4095 }
4096
4097 static void led_sysfs_set_status(unsigned int led,
4098                                  enum led_brightness brightness)
4099 {
4100         led_set_status(led,
4101                         (brightness == LED_OFF) ?
4102                         TPACPI_LED_OFF :
4103                         (tpacpi_led_state_cache[led] == TPACPI_LED_BLINK) ?
4104                                 TPACPI_LED_BLINK : TPACPI_LED_ON);
4105 }
4106
4107 static void led_set_status_worker(struct work_struct *work)
4108 {
4109         struct tpacpi_led_classdev *data =
4110                 container_of(work, struct tpacpi_led_classdev, work);
4111
4112         if (likely(tpacpi_lifecycle == TPACPI_LIFE_RUNNING))
4113                 led_sysfs_set_status(data->led, data->new_brightness);
4114 }
4115
4116 static void led_sysfs_set(struct led_classdev *led_cdev,
4117                         enum led_brightness brightness)
4118 {
4119         struct tpacpi_led_classdev *data = container_of(led_cdev,
4120                              struct tpacpi_led_classdev, led_classdev);
4121
4122         data->new_brightness = brightness;
4123         queue_work(tpacpi_wq, &data->work);
4124 }
4125
4126 static int led_sysfs_blink_set(struct led_classdev *led_cdev,
4127                         unsigned long *delay_on, unsigned long *delay_off)
4128 {
4129         struct tpacpi_led_classdev *data = container_of(led_cdev,
4130                              struct tpacpi_led_classdev, led_classdev);
4131
4132         /* Can we choose the flash rate? */
4133         if (*delay_on == 0 && *delay_off == 0) {
4134                 /* yes. set them to the hardware blink rate (1 Hz) */
4135                 *delay_on = 500; /* ms */
4136                 *delay_off = 500; /* ms */
4137         } else if ((*delay_on != 500) || (*delay_off != 500))
4138                 return -EINVAL;
4139
4140         data->new_brightness = TPACPI_LED_BLINK;
4141         queue_work(tpacpi_wq, &data->work);
4142
4143         return 0;
4144 }
4145
4146 static enum led_brightness led_sysfs_get(struct led_classdev *led_cdev)
4147 {
4148         int rc;
4149
4150         struct tpacpi_led_classdev *data = container_of(led_cdev,
4151                              struct tpacpi_led_classdev, led_classdev);
4152
4153         rc = led_get_status(data->led);
4154
4155         if (rc == TPACPI_LED_OFF || rc < 0)
4156                 rc = LED_OFF;   /* no error handling in led class :( */
4157         else
4158                 rc = LED_FULL;
4159
4160         return rc;
4161 }
4162
4163 static void led_exit(void)
4164 {
4165         unsigned int i;
4166
4167         for (i = 0; i < TPACPI_LED_NUMLEDS; i++) {
4168                 if (tpacpi_leds[i].led_classdev.name)
4169                         led_classdev_unregister(&tpacpi_leds[i].led_classdev);
4170         }
4171
4172         kfree(tpacpi_leds);
4173 }
4174
4175 static int __init led_init(struct ibm_init_struct *iibm)
4176 {
4177         unsigned int i;
4178         int rc;
4179
4180         vdbg_printk(TPACPI_DBG_INIT, "initializing LED subdriver\n");
4181
4182         TPACPI_ACPIHANDLE_INIT(led);
4183
4184         if (!led_handle)
4185                 /* led not supported on R30, R31 */
4186                 led_supported = TPACPI_LED_NONE;
4187         else if (strlencmp(led_path, "SLED") == 0)
4188                 /* 570 */
4189                 led_supported = TPACPI_LED_570;
4190         else if (strlencmp(led_path, "SYSL") == 0)
4191                 /* 600e/x, 770e, 770x, A21e, A2xm/p, T20-22, X20-21 */
4192                 led_supported = TPACPI_LED_OLD;
4193         else
4194                 /* all others */
4195                 led_supported = TPACPI_LED_NEW;
4196
4197         vdbg_printk(TPACPI_DBG_INIT, "LED commands are %s, mode %d\n",
4198                 str_supported(led_supported), led_supported);
4199
4200         tpacpi_leds = kzalloc(sizeof(*tpacpi_leds) * TPACPI_LED_NUMLEDS,
4201                               GFP_KERNEL);
4202         if (!tpacpi_leds) {
4203                 printk(TPACPI_ERR "Out of memory for LED data\n");
4204                 return -ENOMEM;
4205         }
4206
4207         for (i = 0; i < TPACPI_LED_NUMLEDS; i++) {
4208                 tpacpi_leds[i].led = i;
4209
4210                 tpacpi_leds[i].led_classdev.brightness_set = &led_sysfs_set;
4211                 tpacpi_leds[i].led_classdev.blink_set = &led_sysfs_blink_set;
4212                 if (led_supported == TPACPI_LED_570)
4213                         tpacpi_leds[i].led_classdev.brightness_get =
4214                                                         &led_sysfs_get;
4215
4216                 tpacpi_leds[i].led_classdev.name = tpacpi_led_names[i];
4217
4218                 INIT_WORK(&tpacpi_leds[i].work, led_set_status_worker);
4219
4220                 rc = led_classdev_register(&tpacpi_pdev->dev,
4221                                            &tpacpi_leds[i].led_classdev);
4222                 if (rc < 0) {
4223                         tpacpi_leds[i].led_classdev.name = NULL;
4224                         led_exit();
4225                         return rc;
4226                 }
4227         }
4228
4229         return (led_supported != TPACPI_LED_NONE)? 0 : 1;
4230 }
4231
4232 #define str_led_status(s) \
4233         ((s) == TPACPI_LED_OFF ? "off" : \
4234                 ((s) == TPACPI_LED_ON ? "on" : "blinking"))
4235
4236 static int led_read(char *p)
4237 {
4238         int len = 0;
4239
4240         if (!led_supported) {
4241                 len += sprintf(p + len, "status:\t\tnot supported\n");
4242                 return len;
4243         }
4244         len += sprintf(p + len, "status:\t\tsupported\n");
4245
4246         if (led_supported == TPACPI_LED_570) {
4247                 /* 570 */
4248                 int i, status;
4249                 for (i = 0; i < 8; i++) {
4250                         status = led_get_status(i);
4251                         if (status < 0)
4252                                 return -EIO;
4253                         len += sprintf(p + len, "%d:\t\t%s\n",
4254                                        i, str_led_status(status));
4255                 }
4256         }
4257
4258         len += sprintf(p + len, "commands:\t"
4259                        "<led> on, <led> off, <led> blink (<led> is 0-7)\n");
4260
4261         return len;
4262 }
4263
4264 static int led_write(char *buf)
4265 {
4266         char *cmd;
4267         int led, rc;
4268         enum led_status_t s;
4269
4270         if (!led_supported)
4271                 return -ENODEV;
4272
4273         while ((cmd = next_cmd(&buf))) {
4274                 if (sscanf(cmd, "%d", &led) != 1 || led < 0 || led > 7)
4275                         return -EINVAL;
4276
4277                 if (strstr(cmd, "off")) {
4278                         s = TPACPI_LED_OFF;
4279                 } else if (strstr(cmd, "on")) {
4280                         s = TPACPI_LED_ON;
4281                 } else if (strstr(cmd, "blink")) {
4282                         s = TPACPI_LED_BLINK;
4283                 } else {
4284                         return -EINVAL;
4285                 }
4286
4287                 rc = led_set_status(led, s);
4288                 if (rc < 0)
4289                         return rc;
4290         }
4291
4292         return 0;
4293 }
4294
4295 static struct ibm_struct led_driver_data = {
4296         .name = "led",
4297         .read = led_read,
4298         .write = led_write,
4299         .exit = led_exit,
4300 };
4301
4302 /*************************************************************************
4303  * Beep subdriver
4304  */
4305
4306 TPACPI_HANDLE(beep, ec, "BEEP");        /* all except R30, R31 */
4307
4308 static int __init beep_init(struct ibm_init_struct *iibm)
4309 {
4310         vdbg_printk(TPACPI_DBG_INIT, "initializing beep subdriver\n");
4311
4312         TPACPI_ACPIHANDLE_INIT(beep);
4313
4314         vdbg_printk(TPACPI_DBG_INIT, "beep is %s\n",
4315                 str_supported(beep_handle != NULL));
4316
4317         return (beep_handle)? 0 : 1;
4318 }
4319
4320 static int beep_read(char *p)
4321 {
4322         int len = 0;
4323
4324         if (!beep_handle)
4325                 len += sprintf(p + len, "status:\t\tnot supported\n");
4326         else {
4327                 len += sprintf(p + len, "status:\t\tsupported\n");
4328                 len += sprintf(p + len, "commands:\t<cmd> (<cmd> is 0-17)\n");
4329         }
4330
4331         return len;
4332 }
4333
4334 static int beep_write(char *buf)
4335 {
4336         char *cmd;
4337         int beep_cmd;
4338
4339         if (!beep_handle)
4340                 return -ENODEV;
4341
4342         while ((cmd = next_cmd(&buf))) {
4343                 if (sscanf(cmd, "%u", &beep_cmd) == 1 &&
4344                     beep_cmd >= 0 && beep_cmd <= 17) {
4345                         /* beep_cmd set */
4346                 } else
4347                         return -EINVAL;
4348                 if (!acpi_evalf(beep_handle, NULL, NULL, "vdd", beep_cmd, 0))
4349                         return -EIO;
4350         }
4351
4352         return 0;
4353 }
4354
4355 static struct ibm_struct beep_driver_data = {
4356         .name = "beep",
4357         .read = beep_read,
4358         .write = beep_write,
4359 };
4360
4361 /*************************************************************************
4362  * Thermal subdriver
4363  */
4364
4365 enum thermal_access_mode {
4366         TPACPI_THERMAL_NONE = 0,        /* No thermal support */
4367         TPACPI_THERMAL_ACPI_TMP07,      /* Use ACPI TMP0-7 */
4368         TPACPI_THERMAL_ACPI_UPDT,       /* Use ACPI TMP0-7 with UPDT */
4369         TPACPI_THERMAL_TPEC_8,          /* Use ACPI EC regs, 8 sensors */
4370         TPACPI_THERMAL_TPEC_16,         /* Use ACPI EC regs, 16 sensors */
4371 };
4372
4373 enum { /* TPACPI_THERMAL_TPEC_* */
4374         TP_EC_THERMAL_TMP0 = 0x78,      /* ACPI EC regs TMP 0..7 */
4375         TP_EC_THERMAL_TMP8 = 0xC0,      /* ACPI EC regs TMP 8..15 */
4376         TP_EC_THERMAL_TMP_NA = -128,    /* ACPI EC sensor not available */
4377 };
4378
4379 #define TPACPI_MAX_THERMAL_SENSORS 16   /* Max thermal sensors supported */
4380 struct ibm_thermal_sensors_struct {
4381         s32 temp[TPACPI_MAX_THERMAL_SENSORS];
4382 };
4383
4384 static enum thermal_access_mode thermal_read_mode;
4385
4386 /* idx is zero-based */
4387 static int thermal_get_sensor(int idx, s32 *value)
4388 {
4389         int t;
4390         s8 tmp;
4391         char tmpi[5];
4392
4393         t = TP_EC_THERMAL_TMP0;
4394
4395         switch (thermal_read_mode) {
4396 #if TPACPI_MAX_THERMAL_SENSORS >= 16
4397         case TPACPI_THERMAL_TPEC_16:
4398                 if (idx >= 8 && idx <= 15) {
4399                         t = TP_EC_THERMAL_TMP8;
4400                         idx -= 8;
4401                 }
4402                 /* fallthrough */
4403 #endif
4404         case TPACPI_THERMAL_TPEC_8:
4405                 if (idx <= 7) {
4406                         if (!acpi_ec_read(t + idx, &tmp))
4407                                 return -EIO;
4408                         *value = tmp * 1000;
4409                         return 0;
4410                 }
4411                 break;
4412
4413         case TPACPI_THERMAL_ACPI_UPDT:
4414                 if (idx <= 7) {
4415                         snprintf(tmpi, sizeof(tmpi), "TMP%c", '0' + idx);
4416                         if (!acpi_evalf(ec_handle, NULL, "UPDT", "v"))
4417                                 return -EIO;
4418                         if (!acpi_evalf(ec_handle, &t, tmpi, "d"))
4419                                 return -EIO;
4420                         *value = (t - 2732) * 100;
4421                         return 0;
4422                 }
4423                 break;
4424
4425         case TPACPI_THERMAL_ACPI_TMP07:
4426                 if (idx <= 7) {
4427                         snprintf(tmpi, sizeof(tmpi), "TMP%c", '0' + idx);
4428                         if (!acpi_evalf(ec_handle, &t, tmpi, "d"))
4429                                 return -EIO;
4430                         if (t > 127 || t < -127)
4431                                 t = TP_EC_THERMAL_TMP_NA;
4432                         *value = t * 1000;
4433                         return 0;
4434                 }
4435                 break;
4436
4437         case TPACPI_THERMAL_NONE:
4438         default:
4439                 return -ENOSYS;
4440         }
4441
4442         return -EINVAL;
4443 }
4444
4445 static int thermal_get_sensors(struct ibm_thermal_sensors_struct *s)
4446 {
4447         int res, i;
4448         int n;
4449
4450         n = 8;
4451         i = 0;
4452
4453         if (!s)
4454                 return -EINVAL;
4455
4456         if (thermal_read_mode == TPACPI_THERMAL_TPEC_16)
4457                 n = 16;
4458
4459         for (i = 0 ; i < n; i++) {
4460                 res = thermal_get_sensor(i, &s->temp[i]);
4461                 if (res)
4462                         return res;
4463         }
4464
4465         return n;
4466 }
4467
4468 /* sysfs temp##_input -------------------------------------------------- */
4469
4470 static ssize_t thermal_temp_input_show(struct device *dev,
4471                            struct device_attribute *attr,
4472                            char *buf)
4473 {
4474         struct sensor_device_attribute *sensor_attr =
4475                                         to_sensor_dev_attr(attr);
4476         int idx = sensor_attr->index;
4477         s32 value;
4478         int res;
4479
4480         res = thermal_get_sensor(idx, &value);
4481         if (res)
4482                 return res;
4483         if (value == TP_EC_THERMAL_TMP_NA * 1000)
4484                 return -ENXIO;
4485
4486         return snprintf(buf, PAGE_SIZE, "%d\n", value);
4487 }
4488
4489 #define THERMAL_SENSOR_ATTR_TEMP(_idxA, _idxB) \
4490          SENSOR_ATTR(temp##_idxA##_input, S_IRUGO, \
4491                      thermal_temp_input_show, NULL, _idxB)
4492
4493 static struct sensor_device_attribute sensor_dev_attr_thermal_temp_input[] = {
4494         THERMAL_SENSOR_ATTR_TEMP(1, 0),
4495         THERMAL_SENSOR_ATTR_TEMP(2, 1),
4496         THERMAL_SENSOR_ATTR_TEMP(3, 2),
4497         THERMAL_SENSOR_ATTR_TEMP(4, 3),
4498         THERMAL_SENSOR_ATTR_TEMP(5, 4),
4499         THERMAL_SENSOR_ATTR_TEMP(6, 5),
4500         THERMAL_SENSOR_ATTR_TEMP(7, 6),
4501         THERMAL_SENSOR_ATTR_TEMP(8, 7),
4502         THERMAL_SENSOR_ATTR_TEMP(9, 8),
4503         THERMAL_SENSOR_ATTR_TEMP(10, 9),
4504         THERMAL_SENSOR_ATTR_TEMP(11, 10),
4505         THERMAL_SENSOR_ATTR_TEMP(12, 11),
4506         THERMAL_SENSOR_ATTR_TEMP(13, 12),
4507         THERMAL_SENSOR_ATTR_TEMP(14, 13),
4508         THERMAL_SENSOR_ATTR_TEMP(15, 14),
4509         THERMAL_SENSOR_ATTR_TEMP(16, 15),
4510 };
4511
4512 #define THERMAL_ATTRS(X) \
4513         &sensor_dev_attr_thermal_temp_input[X].dev_attr.attr
4514
4515 static struct attribute *thermal_temp_input_attr[] = {
4516         THERMAL_ATTRS(8),
4517         THERMAL_ATTRS(9),
4518         THERMAL_ATTRS(10),
4519         THERMAL_ATTRS(11),
4520         THERMAL_ATTRS(12),
4521         THERMAL_ATTRS(13),
4522         THERMAL_ATTRS(14),
4523         THERMAL_ATTRS(15),
4524         THERMAL_ATTRS(0),
4525         THERMAL_ATTRS(1),
4526         THERMAL_ATTRS(2),
4527         THERMAL_ATTRS(3),
4528         THERMAL_ATTRS(4),
4529         THERMAL_ATTRS(5),
4530         THERMAL_ATTRS(6),
4531         THERMAL_ATTRS(7),
4532         NULL
4533 };
4534
4535 static const struct attribute_group thermal_temp_input16_group = {
4536         .attrs = thermal_temp_input_attr
4537 };
4538
4539 static const struct attribute_group thermal_temp_input8_group = {
4540         .attrs = &thermal_temp_input_attr[8]
4541 };
4542
4543 #undef THERMAL_SENSOR_ATTR_TEMP
4544 #undef THERMAL_ATTRS
4545
4546 /* --------------------------------------------------------------------- */
4547
4548 static int __init thermal_init(struct ibm_init_struct *iibm)
4549 {
4550         u8 t, ta1, ta2;
4551         int i;
4552         int acpi_tmp7;
4553         int res;
4554
4555         vdbg_printk(TPACPI_DBG_INIT, "initializing thermal subdriver\n");
4556
4557         acpi_tmp7 = acpi_evalf(ec_handle, NULL, "TMP7", "qv");
4558
4559         if (thinkpad_id.ec_model) {
4560                 /*
4561                  * Direct EC access mode: sensors at registers
4562                  * 0x78-0x7F, 0xC0-0xC7.  Registers return 0x00 for
4563                  * non-implemented, thermal sensors return 0x80 when
4564                  * not available
4565                  */
4566
4567                 ta1 = ta2 = 0;
4568                 for (i = 0; i < 8; i++) {
4569                         if (acpi_ec_read(TP_EC_THERMAL_TMP0 + i, &t)) {
4570                                 ta1 |= t;
4571                         } else {
4572                                 ta1 = 0;
4573                                 break;
4574                         }
4575                         if (acpi_ec_read(TP_EC_THERMAL_TMP8 + i, &t)) {
4576                                 ta2 |= t;
4577                         } else {
4578                                 ta1 = 0;
4579                                 break;
4580                         }
4581                 }
4582                 if (ta1 == 0) {
4583                         /* This is sheer paranoia, but we handle it anyway */
4584                         if (acpi_tmp7) {
4585                                 printk(TPACPI_ERR
4586                                        "ThinkPad ACPI EC access misbehaving, "
4587                                        "falling back to ACPI TMPx access "
4588                                        "mode\n");
4589                                 thermal_read_mode = TPACPI_THERMAL_ACPI_TMP07;
4590                         } else {
4591                                 printk(TPACPI_ERR
4592                                        "ThinkPad ACPI EC access misbehaving, "
4593                                        "disabling thermal sensors access\n");
4594                                 thermal_read_mode = TPACPI_THERMAL_NONE;
4595                         }
4596                 } else {
4597                         thermal_read_mode =
4598                             (ta2 != 0) ?
4599                             TPACPI_THERMAL_TPEC_16 : TPACPI_THERMAL_TPEC_8;
4600                 }
4601         } else if (acpi_tmp7) {
4602                 if (acpi_evalf(ec_handle, NULL, "UPDT", "qv")) {
4603                         /* 600e/x, 770e, 770x */
4604                         thermal_read_mode = TPACPI_THERMAL_ACPI_UPDT;
4605                 } else {
4606                         /* Standard ACPI TMPx access, max 8 sensors */
4607                         thermal_read_mode = TPACPI_THERMAL_ACPI_TMP07;
4608                 }
4609         } else {
4610                 /* temperatures not supported on 570, G4x, R30, R31, R32 */
4611                 thermal_read_mode = TPACPI_THERMAL_NONE;
4612         }
4613
4614         vdbg_printk(TPACPI_DBG_INIT, "thermal is %s, mode %d\n",
4615                 str_supported(thermal_read_mode != TPACPI_THERMAL_NONE),
4616                 thermal_read_mode);
4617
4618         switch (thermal_read_mode) {
4619         case TPACPI_THERMAL_TPEC_16:
4620                 res = sysfs_create_group(&tpacpi_sensors_pdev->dev.kobj,
4621                                 &thermal_temp_input16_group);
4622                 if (res)
4623                         return res;
4624                 break;
4625         case TPACPI_THERMAL_TPEC_8:
4626         case TPACPI_THERMAL_ACPI_TMP07:
4627         case TPACPI_THERMAL_ACPI_UPDT:
4628                 res = sysfs_create_group(&tpacpi_sensors_pdev->dev.kobj,
4629                                 &thermal_temp_input8_group);
4630                 if (res)
4631                         return res;
4632                 break;
4633         case TPACPI_THERMAL_NONE:
4634         default:
4635                 return 1;
4636         }
4637
4638         return 0;
4639 }
4640
4641 static void thermal_exit(void)
4642 {
4643         switch (thermal_read_mode) {
4644         case TPACPI_THERMAL_TPEC_16:
4645                 sysfs_remove_group(&tpacpi_sensors_pdev->dev.kobj,
4646                                    &thermal_temp_input16_group);
4647                 break;
4648         case TPACPI_THERMAL_TPEC_8:
4649         case TPACPI_THERMAL_ACPI_TMP07:
4650         case TPACPI_THERMAL_ACPI_UPDT:
4651                 sysfs_remove_group(&tpacpi_sensors_pdev->dev.kobj,
4652                                    &thermal_temp_input16_group);
4653                 break;
4654         case TPACPI_THERMAL_NONE:
4655         default:
4656                 break;
4657         }
4658 }
4659
4660 static int thermal_read(char *p)
4661 {
4662         int len = 0;
4663         int n, i;
4664         struct ibm_thermal_sensors_struct t;
4665
4666         n = thermal_get_sensors(&t);
4667         if (unlikely(n < 0))
4668                 return n;
4669
4670         len += sprintf(p + len, "temperatures:\t");
4671
4672         if (n > 0) {
4673                 for (i = 0; i < (n - 1); i++)
4674                         len += sprintf(p + len, "%d ", t.temp[i] / 1000);
4675                 len += sprintf(p + len, "%d\n", t.temp[i] / 1000);
4676         } else
4677                 len += sprintf(p + len, "not supported\n");
4678
4679         return len;
4680 }
4681
4682 static struct ibm_struct thermal_driver_data = {
4683         .name = "thermal",
4684         .read = thermal_read,
4685         .exit = thermal_exit,
4686 };
4687
4688 /*************************************************************************
4689  * EC Dump subdriver
4690  */
4691
4692 static u8 ecdump_regs[256];
4693
4694 static int ecdump_read(char *p)
4695 {
4696         int len = 0;
4697         int i, j;
4698         u8 v;
4699
4700         len += sprintf(p + len, "EC      "
4701                        " +00 +01 +02 +03 +04 +05 +06 +07"
4702                        " +08 +09 +0a +0b +0c +0d +0e +0f\n");
4703         for (i = 0; i < 256; i += 16) {
4704                 len += sprintf(p + len, "EC 0x%02x:", i);
4705                 for (j = 0; j < 16; j++) {
4706                         if (!acpi_ec_read(i + j, &v))
4707                                 break;
4708                         if (v != ecdump_regs[i + j])
4709                                 len += sprintf(p + len, " *%02x", v);
4710                         else
4711                                 len += sprintf(p + len, "  %02x", v);
4712                         ecdump_regs[i + j] = v;
4713                 }
4714                 len += sprintf(p + len, "\n");
4715                 if (j != 16)
4716                         break;
4717         }
4718
4719         /* These are way too dangerous to advertise openly... */
4720 #if 0
4721         len += sprintf(p + len, "commands:\t0x<offset> 0x<value>"
4722                        " (<offset> is 00-ff, <value> is 00-ff)\n");
4723         len += sprintf(p + len, "commands:\t0x<offset> <value>  "
4724                        " (<offset> is 00-ff, <value> is 0-255)\n");
4725 #endif
4726         return len;
4727 }
4728
4729 static int ecdump_write(char *buf)
4730 {
4731         char *cmd;
4732         int i, v;
4733
4734         while ((cmd = next_cmd(&buf))) {
4735                 if (sscanf(cmd, "0x%x 0x%x", &i, &v) == 2) {
4736                         /* i and v set */
4737                 } else if (sscanf(cmd, "0x%x %u", &i, &v) == 2) {
4738                         /* i and v set */
4739                 } else
4740                         return -EINVAL;
4741                 if (i >= 0 && i < 256 && v >= 0 && v < 256) {
4742                         if (!acpi_ec_write(i, v))
4743                                 return -EIO;
4744                 } else
4745                         return -EINVAL;
4746         }
4747
4748         return 0;
4749 }
4750
4751 static struct ibm_struct ecdump_driver_data = {
4752         .name = "ecdump",
4753         .read = ecdump_read,
4754         .write = ecdump_write,
4755         .flags.experimental = 1,
4756 };
4757
4758 /*************************************************************************
4759  * Backlight/brightness subdriver
4760  */
4761
4762 #define TPACPI_BACKLIGHT_DEV_NAME "thinkpad_screen"
4763
4764 enum {
4765         TP_EC_BACKLIGHT = 0x31,
4766
4767         /* TP_EC_BACKLIGHT bitmasks */
4768         TP_EC_BACKLIGHT_LVLMSK = 0x1F,
4769         TP_EC_BACKLIGHT_CMDMSK = 0xE0,
4770         TP_EC_BACKLIGHT_MAPSW = 0x20,
4771 };
4772
4773 static struct backlight_device *ibm_backlight_device;
4774 static int brightness_mode;
4775 static unsigned int brightness_enable = 2; /* 2 = auto, 0 = no, 1 = yes */
4776
4777 static struct mutex brightness_mutex;
4778
4779 /*
4780  * ThinkPads can read brightness from two places: EC 0x31, or
4781  * CMOS NVRAM byte 0x5E, bits 0-3.
4782  *
4783  * EC 0x31 has the following layout
4784  *   Bit 7: unknown function
4785  *   Bit 6: unknown function
4786  *   Bit 5: Z: honour scale changes, NZ: ignore scale changes
4787  *   Bit 4: must be set to zero to avoid problems
4788  *   Bit 3-0: backlight brightness level
4789  *
4790  * brightness_get_raw returns status data in the EC 0x31 layout
4791  */
4792 static int brightness_get_raw(int *status)
4793 {
4794         u8 lec = 0, lcmos = 0, level = 0;
4795
4796         if (brightness_mode & 1) {
4797                 if (!acpi_ec_read(TP_EC_BACKLIGHT, &lec))
4798                         return -EIO;
4799                 level = lec & TP_EC_BACKLIGHT_LVLMSK;
4800         };
4801         if (brightness_mode & 2) {
4802                 lcmos = (nvram_read_byte(TP_NVRAM_ADDR_BRIGHTNESS)
4803                          & TP_NVRAM_MASK_LEVEL_BRIGHTNESS)
4804                         >> TP_NVRAM_POS_LEVEL_BRIGHTNESS;
4805                 lcmos &= (tp_features.bright_16levels)? 0x0f : 0x07;
4806                 level = lcmos;
4807         }
4808
4809         if (brightness_mode == 3) {
4810                 *status = lec;  /* Prefer EC, CMOS is just a backing store */
4811                 lec &= TP_EC_BACKLIGHT_LVLMSK;
4812                 if (lec == lcmos)
4813                         tp_warned.bright_cmos_ec_unsync = 0;
4814                 else {
4815                         if (!tp_warned.bright_cmos_ec_unsync) {
4816                                 printk(TPACPI_ERR
4817                                         "CMOS NVRAM (%u) and EC (%u) do not "
4818                                         "agree on display brightness level\n",
4819                                         (unsigned int) lcmos,
4820                                         (unsigned int) lec);
4821                                 tp_warned.bright_cmos_ec_unsync = 1;
4822                         }
4823                         return -EIO;
4824                 }
4825         } else {
4826                 *status = level;
4827         }
4828
4829         return 0;
4830 }
4831
4832 /* May return EINTR which can always be mapped to ERESTARTSYS */
4833 static int brightness_set(int value)
4834 {
4835         int cmos_cmd, inc, i, res;
4836         int current_value;
4837         int command_bits;
4838
4839         if (value > ((tp_features.bright_16levels)? 15 : 7) ||
4840             value < 0)
4841                 return -EINVAL;
4842
4843         res = mutex_lock_interruptible(&brightness_mutex);
4844         if (res < 0)
4845                 return res;
4846
4847         res = brightness_get_raw(&current_value);
4848         if (res < 0)
4849                 goto errout;
4850
4851         command_bits = current_value & TP_EC_BACKLIGHT_CMDMSK;
4852         current_value &= TP_EC_BACKLIGHT_LVLMSK;
4853
4854         cmos_cmd = value > current_value ?
4855                         TP_CMOS_BRIGHTNESS_UP :
4856                         TP_CMOS_BRIGHTNESS_DOWN;
4857         inc = (value > current_value)? 1 : -1;
4858
4859         res = 0;
4860         for (i = current_value; i != value; i += inc) {
4861                 if ((brightness_mode & 2) &&
4862                     issue_thinkpad_cmos_command(cmos_cmd)) {
4863                         res = -EIO;
4864                         goto errout;
4865                 }
4866                 if ((brightness_mode & 1) &&
4867                     !acpi_ec_write(TP_EC_BACKLIGHT,
4868                                    (i + inc) | command_bits)) {
4869                         res = -EIO;
4870                         goto errout;;
4871                 }
4872         }
4873
4874 errout:
4875         mutex_unlock(&brightness_mutex);
4876         return res;
4877 }
4878
4879 /* sysfs backlight class ----------------------------------------------- */
4880
4881 static int brightness_update_status(struct backlight_device *bd)
4882 {
4883         /* it is the backlight class's job (caller) to handle
4884          * EINTR and other errors properly */
4885         return brightness_set(
4886                 (bd->props.fb_blank == FB_BLANK_UNBLANK &&
4887                  bd->props.power == FB_BLANK_UNBLANK) ?
4888                                 bd->props.brightness : 0);
4889 }
4890
4891 static int brightness_get(struct backlight_device *bd)
4892 {
4893         int status, res;
4894
4895         res = brightness_get_raw(&status);
4896         if (res < 0)
4897                 return 0; /* FIXME: teach backlight about error handling */
4898
4899         return status & TP_EC_BACKLIGHT_LVLMSK;
4900 }
4901
4902 static struct backlight_ops ibm_backlight_data = {
4903         .get_brightness = brightness_get,
4904         .update_status  = brightness_update_status,
4905 };
4906
4907 /* --------------------------------------------------------------------- */
4908
4909 static int __init brightness_init(struct ibm_init_struct *iibm)
4910 {
4911         int b;
4912
4913         vdbg_printk(TPACPI_DBG_INIT, "initializing brightness subdriver\n");
4914
4915         mutex_init(&brightness_mutex);
4916
4917         /*
4918          * We always attempt to detect acpi support, so as to switch
4919          * Lenovo Vista BIOS to ACPI brightness mode even if we are not
4920          * going to publish a backlight interface
4921          */
4922         b = tpacpi_check_std_acpi_brightness_support();
4923         if (b > 0) {
4924                 if (thinkpad_id.vendor == PCI_VENDOR_ID_LENOVO) {
4925                         printk(TPACPI_NOTICE
4926                                "Lenovo BIOS switched to ACPI backlight "
4927                                "control mode\n");
4928                 }
4929                 if (brightness_enable > 1) {
4930                         printk(TPACPI_NOTICE
4931                                "standard ACPI backlight interface "
4932                                "available, not loading native one...\n");
4933                         return 1;
4934                 }
4935         }
4936
4937         if (!brightness_enable) {
4938                 dbg_printk(TPACPI_DBG_INIT,
4939                            "brightness support disabled by "
4940                            "module parameter\n");
4941                 return 1;
4942         }
4943
4944         if (b > 16) {
4945                 printk(TPACPI_ERR
4946                        "Unsupported brightness interface, "
4947                        "please contact %s\n", TPACPI_MAIL);
4948                 return 1;
4949         }
4950         if (b == 16)
4951                 tp_features.bright_16levels = 1;
4952
4953         if (!brightness_mode) {
4954                 if (thinkpad_id.vendor == PCI_VENDOR_ID_LENOVO)
4955                         brightness_mode = 2;
4956                 else
4957                         brightness_mode = 3;
4958
4959                 dbg_printk(TPACPI_DBG_INIT, "selected brightness_mode=%d\n",
4960                         brightness_mode);
4961         }
4962
4963         if (brightness_mode > 3)
4964                 return -EINVAL;
4965
4966         if (brightness_get_raw(&b) < 0)
4967                 return 1;
4968
4969         if (tp_features.bright_16levels)
4970                 printk(TPACPI_INFO
4971                        "detected a 16-level brightness capable ThinkPad\n");
4972
4973         ibm_backlight_device = backlight_device_register(
4974                                         TPACPI_BACKLIGHT_DEV_NAME, NULL, NULL,
4975                                         &ibm_backlight_data);
4976         if (IS_ERR(ibm_backlight_device)) {
4977                 printk(TPACPI_ERR "Could not register backlight device\n");
4978                 return PTR_ERR(ibm_backlight_device);
4979         }
4980         vdbg_printk(TPACPI_DBG_INIT, "brightness is supported\n");
4981
4982         ibm_backlight_device->props.max_brightness =
4983                                 (tp_features.bright_16levels)? 15 : 7;
4984         ibm_backlight_device->props.brightness = b & TP_EC_BACKLIGHT_LVLMSK;
4985         backlight_update_status(ibm_backlight_device);
4986
4987         return 0;
4988 }
4989
4990 static void brightness_exit(void)
4991 {
4992         if (ibm_backlight_device) {
4993                 vdbg_printk(TPACPI_DBG_EXIT,
4994                             "calling backlight_device_unregister()\n");
4995                 backlight_device_unregister(ibm_backlight_device);
4996         }
4997 }
4998
4999 static int brightness_read(char *p)
5000 {
5001         int len = 0;
5002         int level;
5003
5004         level = brightness_get(NULL);
5005         if (level < 0) {
5006                 len += sprintf(p + len, "level:\t\tunreadable\n");
5007         } else {
5008                 len += sprintf(p + len, "level:\t\t%d\n", level);
5009                 len += sprintf(p + len, "commands:\tup, down\n");
5010                 len += sprintf(p + len, "commands:\tlevel <level>"
5011                                " (<level> is 0-%d)\n",
5012                                (tp_features.bright_16levels) ? 15 : 7);
5013         }
5014
5015         return len;
5016 }
5017
5018 static int brightness_write(char *buf)
5019 {
5020         int level;
5021         int rc;
5022         char *cmd;
5023         int max_level = (tp_features.bright_16levels) ? 15 : 7;
5024
5025         level = brightness_get(NULL);
5026         if (level < 0)
5027                 return level;
5028
5029         while ((cmd = next_cmd(&buf))) {
5030                 if (strlencmp(cmd, "up") == 0) {
5031                         if (level < max_level)
5032                                 level++;
5033                 } else if (strlencmp(cmd, "down") == 0) {
5034                         if (level > 0)
5035                                 level--;
5036                 } else if (sscanf(cmd, "level %d", &level) == 1 &&
5037                            level >= 0 && level <= max_level) {
5038                         /* new level set */
5039                 } else
5040                         return -EINVAL;
5041         }
5042
5043         /*
5044          * Now we know what the final level should be, so we try to set it.
5045          * Doing it this way makes the syscall restartable in case of EINTR
5046          */
5047         rc = brightness_set(level);
5048         return (rc == -EINTR)? ERESTARTSYS : rc;
5049 }
5050
5051 static struct ibm_struct brightness_driver_data = {
5052         .name = "brightness",
5053         .read = brightness_read,
5054         .write = brightness_write,
5055         .exit = brightness_exit,
5056 };
5057
5058 /*************************************************************************
5059  * Volume subdriver
5060  */
5061
5062 static int volume_offset = 0x30;
5063
5064 static int volume_read(char *p)
5065 {
5066         int len = 0;
5067         u8 level;
5068
5069         if (!acpi_ec_read(volume_offset, &level)) {
5070                 len += sprintf(p + len, "level:\t\tunreadable\n");
5071         } else {
5072                 len += sprintf(p + len, "level:\t\t%d\n", level & 0xf);
5073                 len += sprintf(p + len, "mute:\t\t%s\n", onoff(level, 6));
5074                 len += sprintf(p + len, "commands:\tup, down, mute\n");
5075                 len += sprintf(p + len, "commands:\tlevel <level>"
5076                                " (<level> is 0-15)\n");
5077         }
5078
5079         return len;
5080 }
5081
5082 static int volume_write(char *buf)
5083 {
5084         int cmos_cmd, inc, i;
5085         u8 level, mute;
5086         int new_level, new_mute;
5087         char *cmd;
5088
5089         while ((cmd = next_cmd(&buf))) {
5090                 if (!acpi_ec_read(volume_offset, &level))
5091                         return -EIO;
5092                 new_mute = mute = level & 0x40;
5093                 new_level = level = level & 0xf;
5094
5095                 if (strlencmp(cmd, "up") == 0) {
5096                         if (mute)
5097                                 new_mute = 0;
5098                         else
5099                                 new_level = level == 15 ? 15 : level + 1;
5100                 } else if (strlencmp(cmd, "down") == 0) {
5101                         if (mute)
5102                                 new_mute = 0;
5103                         else
5104                                 new_level = level == 0 ? 0 : level - 1;
5105                 } else if (sscanf(cmd, "level %d", &new_level) == 1 &&
5106                            new_level >= 0 && new_level <= 15) {
5107                         /* new_level set */
5108                 } else if (strlencmp(cmd, "mute") == 0) {
5109                         new_mute = 0x40;
5110                 } else
5111                         return -EINVAL;
5112
5113                 if (new_level != level) {
5114                         /* mute doesn't change */
5115
5116                         cmos_cmd = (new_level > level) ?
5117                                         TP_CMOS_VOLUME_UP : TP_CMOS_VOLUME_DOWN;
5118                         inc = new_level > level ? 1 : -1;
5119
5120                         if (mute && (issue_thinkpad_cmos_command(cmos_cmd) ||
5121                                      !acpi_ec_write(volume_offset, level)))
5122                                 return -EIO;
5123
5124                         for (i = level; i != new_level; i += inc)
5125                                 if (issue_thinkpad_cmos_command(cmos_cmd) ||
5126                                     !acpi_ec_write(volume_offset, i + inc))
5127                                         return -EIO;
5128
5129                         if (mute &&
5130                             (issue_thinkpad_cmos_command(TP_CMOS_VOLUME_MUTE) ||
5131                              !acpi_ec_write(volume_offset, new_level + mute))) {
5132                                 return -EIO;
5133                         }
5134                 }
5135
5136                 if (new_mute != mute) {
5137                         /* level doesn't change */
5138
5139                         cmos_cmd = (new_mute) ?
5140                                    TP_CMOS_VOLUME_MUTE : TP_CMOS_VOLUME_UP;
5141
5142                         if (issue_thinkpad_cmos_command(cmos_cmd) ||
5143                             !acpi_ec_write(volume_offset, level + new_mute))
5144                                 return -EIO;
5145                 }
5146         }
5147
5148         return 0;
5149 }
5150
5151 static struct ibm_struct volume_driver_data = {
5152         .name = "volume",
5153         .read = volume_read,
5154         .write = volume_write,
5155 };
5156
5157 /*************************************************************************
5158  * Fan subdriver
5159  */
5160
5161 /*
5162  * FAN ACCESS MODES
5163  *
5164  * TPACPI_FAN_RD_ACPI_GFAN:
5165  *      ACPI GFAN method: returns fan level
5166  *
5167  *      see TPACPI_FAN_WR_ACPI_SFAN
5168  *      EC 0x2f (HFSP) not available if GFAN exists
5169  *
5170  * TPACPI_FAN_WR_ACPI_SFAN:
5171  *      ACPI SFAN method: sets fan level, 0 (stop) to 7 (max)
5172  *
5173  *      EC 0x2f (HFSP) might be available *for reading*, but do not use
5174  *      it for writing.
5175  *
5176  * TPACPI_FAN_WR_TPEC:
5177  *      ThinkPad EC register 0x2f (HFSP): fan control loop mode
5178  *      Supported on almost all ThinkPads
5179  *
5180  *      Fan speed changes of any sort (including those caused by the
5181  *      disengaged mode) are usually done slowly by the firmware as the
5182  *      maximum ammount of fan duty cycle change per second seems to be
5183  *      limited.
5184  *
5185  *      Reading is not available if GFAN exists.
5186  *      Writing is not available if SFAN exists.
5187  *
5188  *      Bits
5189  *       7      automatic mode engaged;
5190  *              (default operation mode of the ThinkPad)
5191  *              fan level is ignored in this mode.
5192  *       6      full speed mode (takes precedence over bit 7);
5193  *              not available on all thinkpads.  May disable
5194  *              the tachometer while the fan controller ramps up
5195  *              the speed (which can take up to a few *minutes*).
5196  *              Speeds up fan to 100% duty-cycle, which is far above
5197  *              the standard RPM levels.  It is not impossible that
5198  *              it could cause hardware damage.
5199  *      5-3     unused in some models.  Extra bits for fan level
5200  *              in others, but still useless as all values above
5201  *              7 map to the same speed as level 7 in these models.
5202  *      2-0     fan level (0..7 usually)
5203  *                      0x00 = stop
5204  *                      0x07 = max (set when temperatures critical)
5205  *              Some ThinkPads may have other levels, see
5206  *              TPACPI_FAN_WR_ACPI_FANS (X31/X40/X41)
5207  *
5208  *      FIRMWARE BUG: on some models, EC 0x2f might not be initialized at
5209  *      boot. Apparently the EC does not intialize it, so unless ACPI DSDT
5210  *      does so, its initial value is meaningless (0x07).
5211  *
5212  *      For firmware bugs, refer to:
5213  *      http://thinkwiki.org/wiki/Embedded_Controller_Firmware#Firmware_Issues
5214  *
5215  *      ----
5216  *
5217  *      ThinkPad EC register 0x84 (LSB), 0x85 (MSB):
5218  *      Main fan tachometer reading (in RPM)
5219  *
5220  *      This register is present on all ThinkPads with a new-style EC, and
5221  *      it is known not to be present on the A21m/e, and T22, as there is
5222  *      something else in offset 0x84 according to the ACPI DSDT.  Other
5223  *      ThinkPads from this same time period (and earlier) probably lack the
5224  *      tachometer as well.
5225  *
5226  *      Unfortunately a lot of ThinkPads with new-style ECs but whose firwmare
5227  *      was never fixed by IBM to report the EC firmware version string
5228  *      probably support the tachometer (like the early X models), so
5229  *      detecting it is quite hard.  We need more data to know for sure.
5230  *
5231  *      FIRMWARE BUG: always read 0x84 first, otherwise incorrect readings
5232  *      might result.
5233  *
5234  *      FIRMWARE BUG: may go stale while the EC is switching to full speed
5235  *      mode.
5236  *
5237  *      For firmware bugs, refer to:
5238  *      http://thinkwiki.org/wiki/Embedded_Controller_Firmware#Firmware_Issues
5239  *
5240  * TPACPI_FAN_WR_ACPI_FANS:
5241  *      ThinkPad X31, X40, X41.  Not available in the X60.
5242  *
5243  *      FANS ACPI handle: takes three arguments: low speed, medium speed,
5244  *      high speed.  ACPI DSDT seems to map these three speeds to levels
5245  *      as follows: STOP LOW LOW MED MED HIGH HIGH HIGH HIGH
5246  *      (this map is stored on FAN0..FAN8 as "0,1,1,2,2,3,3,3,3")
5247  *
5248  *      The speeds are stored on handles
5249  *      (FANA:FAN9), (FANC:FANB), (FANE:FAND).
5250  *
5251  *      There are three default speed sets, acessible as handles:
5252  *      FS1L,FS1M,FS1H; FS2L,FS2M,FS2H; FS3L,FS3M,FS3H
5253  *
5254  *      ACPI DSDT switches which set is in use depending on various
5255  *      factors.
5256  *
5257  *      TPACPI_FAN_WR_TPEC is also available and should be used to
5258  *      command the fan.  The X31/X40/X41 seems to have 8 fan levels,
5259  *      but the ACPI tables just mention level 7.
5260  */
5261
5262 enum {                                  /* Fan control constants */
5263         fan_status_offset = 0x2f,       /* EC register 0x2f */
5264         fan_rpm_offset = 0x84,          /* EC register 0x84: LSB, 0x85 MSB (RPM)
5265                                          * 0x84 must be read before 0x85 */
5266
5267         TP_EC_FAN_FULLSPEED = 0x40,     /* EC fan mode: full speed */
5268         TP_EC_FAN_AUTO      = 0x80,     /* EC fan mode: auto fan control */
5269
5270         TPACPI_FAN_LAST_LEVEL = 0x100,  /* Use cached last-seen fan level */
5271 };
5272
5273 enum fan_status_access_mode {
5274         TPACPI_FAN_NONE = 0,            /* No fan status or control */
5275         TPACPI_FAN_RD_ACPI_GFAN,        /* Use ACPI GFAN */
5276         TPACPI_FAN_RD_TPEC,             /* Use ACPI EC regs 0x2f, 0x84-0x85 */
5277 };
5278
5279 enum fan_control_access_mode {
5280         TPACPI_FAN_WR_NONE = 0,         /* No fan control */
5281         TPACPI_FAN_WR_ACPI_SFAN,        /* Use ACPI SFAN */
5282         TPACPI_FAN_WR_TPEC,             /* Use ACPI EC reg 0x2f */
5283         TPACPI_FAN_WR_ACPI_FANS,        /* Use ACPI FANS and EC reg 0x2f */
5284 };
5285
5286 enum fan_control_commands {
5287         TPACPI_FAN_CMD_SPEED    = 0x0001,       /* speed command */
5288         TPACPI_FAN_CMD_LEVEL    = 0x0002,       /* level command  */
5289         TPACPI_FAN_CMD_ENABLE   = 0x0004,       /* enable/disable cmd,
5290                                                  * and also watchdog cmd */
5291 };
5292
5293 static int fan_control_allowed;
5294
5295 static enum fan_status_access_mode fan_status_access_mode;
5296 static enum fan_control_access_mode fan_control_access_mode;
5297 static enum fan_control_commands fan_control_commands;
5298
5299 static u8 fan_control_initial_status;
5300 static u8 fan_control_desired_level;
5301 static int fan_watchdog_maxinterval;
5302
5303 static struct mutex fan_mutex;
5304
5305 static void fan_watchdog_fire(struct work_struct *ignored);
5306 static DECLARE_DELAYED_WORK(fan_watchdog_task, fan_watchdog_fire);
5307
5308 TPACPI_HANDLE(fans, ec, "FANS");        /* X31, X40, X41 */
5309 TPACPI_HANDLE(gfan, ec, "GFAN", /* 570 */
5310            "\\FSPD",            /* 600e/x, 770e, 770x */
5311            );                   /* all others */
5312 TPACPI_HANDLE(sfan, ec, "SFAN", /* 570 */
5313            "JFNS",              /* 770x-JL */
5314            );                   /* all others */
5315
5316 /*
5317  * Call with fan_mutex held
5318  */
5319 static void fan_update_desired_level(u8 status)
5320 {
5321         if ((status &
5322              (TP_EC_FAN_AUTO | TP_EC_FAN_FULLSPEED)) == 0) {
5323                 if (status > 7)
5324                         fan_control_desired_level = 7;
5325                 else
5326                         fan_control_desired_level = status;
5327         }
5328 }
5329
5330 static int fan_get_status(u8 *status)
5331 {
5332         u8 s;
5333
5334         /* TODO:
5335          * Add TPACPI_FAN_RD_ACPI_FANS ? */
5336
5337         switch (fan_status_access_mode) {
5338         case TPACPI_FAN_RD_ACPI_GFAN:
5339                 /* 570, 600e/x, 770e, 770x */
5340
5341                 if (unlikely(!acpi_evalf(gfan_handle, &s, NULL, "d")))
5342                         return -EIO;
5343
5344                 if (likely(status))
5345                         *status = s & 0x07;
5346
5347                 break;
5348
5349         case TPACPI_FAN_RD_TPEC:
5350                 /* all except 570, 600e/x, 770e, 770x */
5351                 if (unlikely(!acpi_ec_read(fan_status_offset, &s)))
5352                         return -EIO;
5353
5354                 if (likely(status))
5355                         *status = s;
5356
5357                 break;
5358
5359         default:
5360                 return -ENXIO;
5361         }
5362
5363         return 0;
5364 }
5365
5366 static int fan_get_status_safe(u8 *status)
5367 {
5368         int rc;
5369         u8 s;
5370
5371         if (mutex_lock_interruptible(&fan_mutex))
5372                 return -ERESTARTSYS;
5373         rc = fan_get_status(&s);
5374         if (!rc)
5375                 fan_update_desired_level(s);
5376         mutex_unlock(&fan_mutex);
5377
5378         if (status)
5379                 *status = s;
5380
5381         return rc;
5382 }
5383
5384 static int fan_get_speed(unsigned int *speed)
5385 {
5386         u8 hi, lo;
5387
5388         switch (fan_status_access_mode) {
5389         case TPACPI_FAN_RD_TPEC:
5390                 /* all except 570, 600e/x, 770e, 770x */
5391                 if (unlikely(!acpi_ec_read(fan_rpm_offset, &lo) ||
5392                              !acpi_ec_read(fan_rpm_offset + 1, &hi)))
5393                         return -EIO;
5394
5395                 if (likely(speed))
5396                         *speed = (hi << 8) | lo;
5397
5398                 break;
5399
5400         default:
5401                 return -ENXIO;
5402         }
5403
5404         return 0;
5405 }
5406
5407 static int fan_set_level(int level)
5408 {
5409         if (!fan_control_allowed)
5410                 return -EPERM;
5411
5412         switch (fan_control_access_mode) {
5413         case TPACPI_FAN_WR_ACPI_SFAN:
5414                 if (level >= 0 && level <= 7) {
5415                         if (!acpi_evalf(sfan_handle, NULL, NULL, "vd", level))
5416                                 return -EIO;
5417                 } else
5418                         return -EINVAL;
5419                 break;
5420
5421         case TPACPI_FAN_WR_ACPI_FANS:
5422         case TPACPI_FAN_WR_TPEC:
5423                 if ((level != TP_EC_FAN_AUTO) &&
5424                     (level != TP_EC_FAN_FULLSPEED) &&
5425                     ((level < 0) || (level > 7)))
5426                         return -EINVAL;
5427
5428                 /* safety net should the EC not support AUTO
5429                  * or FULLSPEED mode bits and just ignore them */
5430                 if (level & TP_EC_FAN_FULLSPEED)
5431                         level |= 7;     /* safety min speed 7 */
5432                 else if (level & TP_EC_FAN_AUTO)
5433                         level |= 4;     /* safety min speed 4 */
5434
5435                 if (!acpi_ec_write(fan_status_offset, level))
5436                         return -EIO;
5437                 else
5438                         tp_features.fan_ctrl_status_undef = 0;
5439                 break;
5440
5441         default:
5442                 return -ENXIO;
5443         }
5444         return 0;
5445 }
5446
5447 static int fan_set_level_safe(int level)
5448 {
5449         int rc;
5450
5451         if (!fan_control_allowed)
5452                 return -EPERM;
5453
5454         if (mutex_lock_interruptible(&fan_mutex))
5455                 return -ERESTARTSYS;
5456
5457         if (level == TPACPI_FAN_LAST_LEVEL)
5458                 level = fan_control_desired_level;
5459
5460         rc = fan_set_level(level);
5461         if (!rc)
5462                 fan_update_desired_level(level);
5463
5464         mutex_unlock(&fan_mutex);
5465         return rc;
5466 }
5467
5468 static int fan_set_enable(void)
5469 {
5470         u8 s;
5471         int rc;
5472
5473         if (!fan_control_allowed)
5474                 return -EPERM;
5475
5476         if (mutex_lock_interruptible(&fan_mutex))
5477                 return -ERESTARTSYS;
5478
5479         switch (fan_control_access_mode) {
5480         case TPACPI_FAN_WR_ACPI_FANS:
5481         case TPACPI_FAN_WR_TPEC:
5482                 rc = fan_get_status(&s);
5483                 if (rc < 0)
5484                         break;
5485
5486                 /* Don't go out of emergency fan mode */
5487                 if (s != 7) {
5488                         s &= 0x07;
5489                         s |= TP_EC_FAN_AUTO | 4; /* min fan speed 4 */
5490                 }
5491
5492                 if (!acpi_ec_write(fan_status_offset, s))
5493                         rc = -EIO;
5494                 else {
5495                         tp_features.fan_ctrl_status_undef = 0;
5496                         rc = 0;
5497                 }
5498                 break;
5499
5500         case TPACPI_FAN_WR_ACPI_SFAN:
5501                 rc = fan_get_status(&s);
5502                 if (rc < 0)
5503                         break;
5504
5505                 s &= 0x07;
5506
5507                 /* Set fan to at least level 4 */
5508                 s |= 4;
5509
5510                 if (!acpi_evalf(sfan_handle, NULL, NULL, "vd", s))
5511                         rc = -EIO;
5512                 else
5513                         rc = 0;
5514                 break;
5515
5516         default:
5517                 rc = -ENXIO;
5518         }
5519
5520         mutex_unlock(&fan_mutex);
5521         return rc;
5522 }
5523
5524 static int fan_set_disable(void)
5525 {
5526         int rc;
5527
5528         if (!fan_control_allowed)
5529                 return -EPERM;
5530
5531         if (mutex_lock_interruptible(&fan_mutex))
5532                 return -ERESTARTSYS;
5533
5534         rc = 0;
5535         switch (fan_control_access_mode) {
5536         case TPACPI_FAN_WR_ACPI_FANS:
5537         case TPACPI_FAN_WR_TPEC:
5538                 if (!acpi_ec_write(fan_status_offset, 0x00))
5539                         rc = -EIO;
5540                 else {
5541                         fan_control_desired_level = 0;
5542                         tp_features.fan_ctrl_status_undef = 0;
5543                 }
5544                 break;
5545
5546         case TPACPI_FAN_WR_ACPI_SFAN:
5547                 if (!acpi_evalf(sfan_handle, NULL, NULL, "vd", 0x00))
5548                         rc = -EIO;
5549                 else
5550                         fan_control_desired_level = 0;
5551                 break;
5552
5553         default:
5554                 rc = -ENXIO;
5555         }
5556
5557
5558         mutex_unlock(&fan_mutex);
5559         return rc;
5560 }
5561
5562 static int fan_set_speed(int speed)
5563 {
5564         int rc;
5565
5566         if (!fan_control_allowed)
5567                 return -EPERM;
5568
5569         if (mutex_lock_interruptible(&fan_mutex))
5570                 return -ERESTARTSYS;
5571
5572         rc = 0;
5573         switch (fan_control_access_mode) {
5574         case TPACPI_FAN_WR_ACPI_FANS:
5575                 if (speed >= 0 && speed <= 65535) {
5576                         if (!acpi_evalf(fans_handle, NULL, NULL, "vddd",
5577                                         speed, speed, speed))
5578                                 rc = -EIO;
5579                 } else
5580                         rc = -EINVAL;
5581                 break;
5582
5583         default:
5584                 rc = -ENXIO;
5585         }
5586
5587         mutex_unlock(&fan_mutex);
5588         return rc;
5589 }
5590
5591 static void fan_watchdog_reset(void)
5592 {
5593         static int fan_watchdog_active;
5594
5595         if (fan_control_access_mode == TPACPI_FAN_WR_NONE)
5596                 return;
5597
5598         if (fan_watchdog_active)
5599                 cancel_delayed_work(&fan_watchdog_task);
5600
5601         if (fan_watchdog_maxinterval > 0 &&
5602             tpacpi_lifecycle != TPACPI_LIFE_EXITING) {
5603                 fan_watchdog_active = 1;
5604                 if (!queue_delayed_work(tpacpi_wq, &fan_watchdog_task,
5605                                 msecs_to_jiffies(fan_watchdog_maxinterval
5606                                                  * 1000))) {
5607                         printk(TPACPI_ERR
5608                                "failed to queue the fan watchdog, "
5609                                "watchdog will not trigger\n");
5610                 }
5611         } else
5612                 fan_watchdog_active = 0;
5613 }
5614
5615 static void fan_watchdog_fire(struct work_struct *ignored)
5616 {
5617         int rc;
5618
5619         if (tpacpi_lifecycle != TPACPI_LIFE_RUNNING)
5620                 return;
5621
5622         printk(TPACPI_NOTICE "fan watchdog: enabling fan\n");
5623         rc = fan_set_enable();
5624         if (rc < 0) {
5625                 printk(TPACPI_ERR "fan watchdog: error %d while enabling fan, "
5626                         "will try again later...\n", -rc);
5627                 /* reschedule for later */
5628                 fan_watchdog_reset();
5629         }
5630 }
5631
5632 /*
5633  * SYSFS fan layout: hwmon compatible (device)
5634  *
5635  * pwm*_enable:
5636  *      0: "disengaged" mode
5637  *      1: manual mode
5638  *      2: native EC "auto" mode (recommended, hardware default)
5639  *
5640  * pwm*: set speed in manual mode, ignored otherwise.
5641  *      0 is level 0; 255 is level 7. Intermediate points done with linear
5642  *      interpolation.
5643  *
5644  * fan*_input: tachometer reading, RPM
5645  *
5646  *
5647  * SYSFS fan layout: extensions
5648  *
5649  * fan_watchdog (driver):
5650  *      fan watchdog interval in seconds, 0 disables (default), max 120
5651  */
5652
5653 /* sysfs fan pwm1_enable ----------------------------------------------- */
5654 static ssize_t fan_pwm1_enable_show(struct device *dev,
5655                                     struct device_attribute *attr,
5656                                     char *buf)
5657 {
5658         int res, mode;
5659         u8 status;
5660
5661         res = fan_get_status_safe(&status);
5662         if (res)
5663                 return res;
5664
5665         if (unlikely(tp_features.fan_ctrl_status_undef)) {
5666                 if (status != fan_control_initial_status) {
5667                         tp_features.fan_ctrl_status_undef = 0;
5668                 } else {
5669                         /* Return most likely status. In fact, it
5670                          * might be the only possible status */
5671                         status = TP_EC_FAN_AUTO;
5672                 }
5673         }
5674
5675         if (status & TP_EC_FAN_FULLSPEED) {
5676                 mode = 0;
5677         } else if (status & TP_EC_FAN_AUTO) {
5678                 mode = 2;
5679         } else
5680                 mode = 1;
5681
5682         return snprintf(buf, PAGE_SIZE, "%d\n", mode);
5683 }
5684
5685 static ssize_t fan_pwm1_enable_store(struct device *dev,
5686                                      struct device_attribute *attr,
5687                                      const char *buf, size_t count)
5688 {
5689         unsigned long t;
5690         int res, level;
5691
5692         if (parse_strtoul(buf, 2, &t))
5693                 return -EINVAL;
5694
5695         switch (t) {
5696         case 0:
5697                 level = TP_EC_FAN_FULLSPEED;
5698                 break;
5699         case 1:
5700                 level = TPACPI_FAN_LAST_LEVEL;
5701                 break;
5702         case 2:
5703                 level = TP_EC_FAN_AUTO;
5704                 break;
5705         case 3:
5706                 /* reserved for software-controlled auto mode */
5707                 return -ENOSYS;
5708         default:
5709                 return -EINVAL;
5710         }
5711
5712         res = fan_set_level_safe(level);
5713         if (res == -ENXIO)
5714                 return -EINVAL;
5715         else if (res < 0)
5716                 return res;
5717
5718         fan_watchdog_reset();
5719
5720         return count;
5721 }
5722
5723 static struct device_attribute dev_attr_fan_pwm1_enable =
5724         __ATTR(pwm1_enable, S_IWUSR | S_IRUGO,
5725                 fan_pwm1_enable_show, fan_pwm1_enable_store);
5726
5727 /* sysfs fan pwm1 ------------------------------------------------------ */
5728 static ssize_t fan_pwm1_show(struct device *dev,
5729                              struct device_attribute *attr,
5730                              char *buf)
5731 {
5732         int res;
5733         u8 status;
5734
5735         res = fan_get_status_safe(&status);
5736         if (res)
5737                 return res;
5738
5739         if (unlikely(tp_features.fan_ctrl_status_undef)) {
5740                 if (status != fan_control_initial_status) {
5741                         tp_features.fan_ctrl_status_undef = 0;
5742                 } else {
5743                         status = TP_EC_FAN_AUTO;
5744                 }
5745         }
5746
5747         if ((status &
5748              (TP_EC_FAN_AUTO | TP_EC_FAN_FULLSPEED)) != 0)
5749                 status = fan_control_desired_level;
5750
5751         if (status > 7)
5752                 status = 7;
5753
5754         return snprintf(buf, PAGE_SIZE, "%u\n", (status * 255) / 7);
5755 }
5756
5757 static ssize_t fan_pwm1_store(struct device *dev,
5758                               struct device_attribute *attr,
5759                               const char *buf, size_t count)
5760 {
5761         unsigned long s;
5762         int rc;
5763         u8 status, newlevel;
5764
5765         if (parse_strtoul(buf, 255, &s))
5766                 return -EINVAL;
5767
5768         /* scale down from 0-255 to 0-7 */
5769         newlevel = (s >> 5) & 0x07;
5770
5771         if (mutex_lock_interruptible(&fan_mutex))
5772                 return -ERESTARTSYS;
5773
5774         rc = fan_get_status(&status);
5775         if (!rc && (status &
5776                     (TP_EC_FAN_AUTO | TP_EC_FAN_FULLSPEED)) == 0) {
5777                 rc = fan_set_level(newlevel);
5778                 if (rc == -ENXIO)
5779                         rc = -EINVAL;
5780                 else if (!rc) {
5781                         fan_update_desired_level(newlevel);
5782                         fan_watchdog_reset();
5783                 }
5784         }
5785
5786         mutex_unlock(&fan_mutex);
5787         return (rc)? rc : count;
5788 }
5789
5790 static struct device_attribute dev_attr_fan_pwm1 =
5791         __ATTR(pwm1, S_IWUSR | S_IRUGO,
5792                 fan_pwm1_show, fan_pwm1_store);
5793
5794 /* sysfs fan fan1_input ------------------------------------------------ */
5795 static ssize_t fan_fan1_input_show(struct device *dev,
5796                            struct device_attribute *attr,
5797                            char *buf)
5798 {
5799         int res;
5800         unsigned int speed;
5801
5802         res = fan_get_speed(&speed);
5803         if (res < 0)
5804                 return res;
5805
5806         return snprintf(buf, PAGE_SIZE, "%u\n", speed);
5807 }
5808
5809 static struct device_attribute dev_attr_fan_fan1_input =
5810         __ATTR(fan1_input, S_IRUGO,
5811                 fan_fan1_input_show, NULL);
5812
5813 /* sysfs fan fan_watchdog (hwmon driver) ------------------------------- */
5814 static ssize_t fan_fan_watchdog_show(struct device_driver *drv,
5815                                      char *buf)
5816 {
5817         return snprintf(buf, PAGE_SIZE, "%u\n", fan_watchdog_maxinterval);
5818 }
5819
5820 static ssize_t fan_fan_watchdog_store(struct device_driver *drv,
5821                                       const char *buf, size_t count)
5822 {
5823         unsigned long t;
5824
5825         if (parse_strtoul(buf, 120, &t))
5826                 return -EINVAL;
5827
5828         if (!fan_control_allowed)
5829                 return -EPERM;
5830
5831         fan_watchdog_maxinterval = t;
5832         fan_watchdog_reset();
5833
5834         return count;
5835 }
5836
5837 static DRIVER_ATTR(fan_watchdog, S_IWUSR | S_IRUGO,
5838                 fan_fan_watchdog_show, fan_fan_watchdog_store);
5839
5840 /* --------------------------------------------------------------------- */
5841 static struct attribute *fan_attributes[] = {
5842         &dev_attr_fan_pwm1_enable.attr, &dev_attr_fan_pwm1.attr,
5843         &dev_attr_fan_fan1_input.attr,
5844         NULL
5845 };
5846
5847 static const struct attribute_group fan_attr_group = {
5848         .attrs = fan_attributes,
5849 };
5850
5851 static int __init fan_init(struct ibm_init_struct *iibm)
5852 {
5853         int rc;
5854
5855         vdbg_printk(TPACPI_DBG_INIT, "initializing fan subdriver\n");
5856
5857         mutex_init(&fan_mutex);
5858         fan_status_access_mode = TPACPI_FAN_NONE;
5859         fan_control_access_mode = TPACPI_FAN_WR_NONE;
5860         fan_control_commands = 0;
5861         fan_watchdog_maxinterval = 0;
5862         tp_features.fan_ctrl_status_undef = 0;
5863         fan_control_desired_level = 7;
5864
5865         TPACPI_ACPIHANDLE_INIT(fans);
5866         TPACPI_ACPIHANDLE_INIT(gfan);
5867         TPACPI_ACPIHANDLE_INIT(sfan);
5868
5869         if (gfan_handle) {
5870                 /* 570, 600e/x, 770e, 770x */
5871                 fan_status_access_mode = TPACPI_FAN_RD_ACPI_GFAN;
5872         } else {
5873                 /* all other ThinkPads: note that even old-style
5874                  * ThinkPad ECs supports the fan control register */
5875                 if (likely(acpi_ec_read(fan_status_offset,
5876                                         &fan_control_initial_status))) {
5877                         fan_status_access_mode = TPACPI_FAN_RD_TPEC;
5878
5879                         /* In some ThinkPads, neither the EC nor the ACPI
5880                          * DSDT initialize the fan status, and it ends up
5881                          * being set to 0x07 when it *could* be either
5882                          * 0x07 or 0x80.
5883                          *
5884                          * Enable for TP-1Y (T43), TP-78 (R51e),
5885                          * TP-76 (R52), TP-70 (T43, R52), which are known
5886                          * to be buggy. */
5887                         if (fan_control_initial_status == 0x07) {
5888                                 switch (thinkpad_id.ec_model) {
5889                                 case 0x5931: /* TP-1Y */
5890                                 case 0x3837: /* TP-78 */
5891                                 case 0x3637: /* TP-76 */
5892                                 case 0x3037: /* TP-70 */
5893                                         printk(TPACPI_NOTICE
5894                                                "fan_init: initial fan status "
5895                                                "is unknown, assuming it is "
5896                                                "in auto mode\n");
5897                                         tp_features.fan_ctrl_status_undef = 1;
5898                                         ;;
5899                                 }
5900                         }
5901                 } else {
5902                         printk(TPACPI_ERR
5903                                "ThinkPad ACPI EC access misbehaving, "
5904                                "fan status and control unavailable\n");
5905                         return 1;
5906                 }
5907         }
5908
5909         if (sfan_handle) {
5910                 /* 570, 770x-JL */
5911                 fan_control_access_mode = TPACPI_FAN_WR_ACPI_SFAN;
5912                 fan_control_commands |=
5913                     TPACPI_FAN_CMD_LEVEL | TPACPI_FAN_CMD_ENABLE;
5914         } else {
5915                 if (!gfan_handle) {
5916                         /* gfan without sfan means no fan control */
5917                         /* all other models implement TP EC 0x2f control */
5918
5919                         if (fans_handle) {
5920                                 /* X31, X40, X41 */
5921                                 fan_control_access_mode =
5922                                     TPACPI_FAN_WR_ACPI_FANS;
5923                                 fan_control_commands |=
5924                                     TPACPI_FAN_CMD_SPEED |
5925                                     TPACPI_FAN_CMD_LEVEL |
5926                                     TPACPI_FAN_CMD_ENABLE;
5927                         } else {
5928                                 fan_control_access_mode = TPACPI_FAN_WR_TPEC;
5929                                 fan_control_commands |=
5930                                     TPACPI_FAN_CMD_LEVEL |
5931                                     TPACPI_FAN_CMD_ENABLE;
5932                         }
5933                 }
5934         }
5935
5936         vdbg_printk(TPACPI_DBG_INIT, "fan is %s, modes %d, %d\n",
5937                 str_supported(fan_status_access_mode != TPACPI_FAN_NONE ||
5938                   fan_control_access_mode != TPACPI_FAN_WR_NONE),
5939                 fan_status_access_mode, fan_control_access_mode);
5940
5941         /* fan control master switch */
5942         if (!fan_control_allowed) {
5943                 fan_control_access_mode = TPACPI_FAN_WR_NONE;
5944                 fan_control_commands = 0;
5945                 dbg_printk(TPACPI_DBG_INIT,
5946                            "fan control features disabled by parameter\n");
5947         }
5948
5949         /* update fan_control_desired_level */
5950         if (fan_status_access_mode != TPACPI_FAN_NONE)
5951                 fan_get_status_safe(NULL);
5952
5953         if (fan_status_access_mode != TPACPI_FAN_NONE ||
5954             fan_control_access_mode != TPACPI_FAN_WR_NONE) {
5955                 rc = sysfs_create_group(&tpacpi_sensors_pdev->dev.kobj,
5956                                          &fan_attr_group);
5957                 if (rc < 0)
5958                         return rc;
5959
5960                 rc = driver_create_file(&tpacpi_hwmon_pdriver.driver,
5961                                         &driver_attr_fan_watchdog);
5962                 if (rc < 0) {
5963                         sysfs_remove_group(&tpacpi_sensors_pdev->dev.kobj,
5964                                         &fan_attr_group);
5965                         return rc;
5966                 }
5967                 return 0;
5968         } else
5969                 return 1;
5970 }
5971
5972 static void fan_exit(void)
5973 {
5974         vdbg_printk(TPACPI_DBG_EXIT,
5975                     "cancelling any pending fan watchdog tasks\n");
5976
5977         /* FIXME: can we really do this unconditionally? */
5978         sysfs_remove_group(&tpacpi_sensors_pdev->dev.kobj, &fan_attr_group);
5979         driver_remove_file(&tpacpi_hwmon_pdriver.driver,
5980                            &driver_attr_fan_watchdog);
5981
5982         cancel_delayed_work(&fan_watchdog_task);
5983         flush_workqueue(tpacpi_wq);
5984 }
5985
5986 static int fan_read(char *p)
5987 {
5988         int len = 0;
5989         int rc;
5990         u8 status;
5991         unsigned int speed = 0;
5992
5993         switch (fan_status_access_mode) {
5994         case TPACPI_FAN_RD_ACPI_GFAN:
5995                 /* 570, 600e/x, 770e, 770x */
5996                 rc = fan_get_status_safe(&status);
5997                 if (rc < 0)
5998                         return rc;
5999
6000                 len += sprintf(p + len, "status:\t\t%s\n"
6001                                "level:\t\t%d\n",
6002                                (status != 0) ? "enabled" : "disabled", status);
6003                 break;
6004
6005         case TPACPI_FAN_RD_TPEC:
6006                 /* all except 570, 600e/x, 770e, 770x */
6007                 rc = fan_get_status_safe(&status);
6008                 if (rc < 0)
6009                         return rc;
6010
6011                 if (unlikely(tp_features.fan_ctrl_status_undef)) {
6012                         if (status != fan_control_initial_status)
6013                                 tp_features.fan_ctrl_status_undef = 0;
6014                         else
6015                                 /* Return most likely status. In fact, it
6016                                  * might be the only possible status */
6017                                 status = TP_EC_FAN_AUTO;
6018                 }
6019
6020                 len += sprintf(p + len, "status:\t\t%s\n",
6021                                (status != 0) ? "enabled" : "disabled");
6022
6023                 rc = fan_get_speed(&speed);
6024                 if (rc < 0)
6025                         return rc;
6026
6027                 len += sprintf(p + len, "speed:\t\t%d\n", speed);
6028
6029                 if (status & TP_EC_FAN_FULLSPEED)
6030                         /* Disengaged mode takes precedence */
6031                         len += sprintf(p + len, "level:\t\tdisengaged\n");
6032                 else if (status & TP_EC_FAN_AUTO)
6033                         len += sprintf(p + len, "level:\t\tauto\n");
6034                 else
6035                         len += sprintf(p + len, "level:\t\t%d\n", status);
6036                 break;
6037
6038         case TPACPI_FAN_NONE:
6039         default:
6040                 len += sprintf(p + len, "status:\t\tnot supported\n");
6041         }
6042
6043         if (fan_control_commands & TPACPI_FAN_CMD_LEVEL) {
6044                 len += sprintf(p + len, "commands:\tlevel <level>");
6045
6046                 switch (fan_control_access_mode) {
6047                 case TPACPI_FAN_WR_ACPI_SFAN:
6048                         len += sprintf(p + len, " (<level> is 0-7)\n");
6049                         break;
6050
6051                 default:
6052                         len += sprintf(p + len, " (<level> is 0-7, "
6053                                        "auto, disengaged, full-speed)\n");
6054                         break;
6055                 }
6056         }
6057
6058         if (fan_control_commands & TPACPI_FAN_CMD_ENABLE)
6059                 len += sprintf(p + len, "commands:\tenable, disable\n"
6060                                "commands:\twatchdog <timeout> (<timeout> "
6061                                "is 0 (off), 1-120 (seconds))\n");
6062
6063         if (fan_control_commands & TPACPI_FAN_CMD_SPEED)
6064                 len += sprintf(p + len, "commands:\tspeed <speed>"
6065                                " (<speed> is 0-65535)\n");
6066
6067         return len;
6068 }
6069
6070 static int fan_write_cmd_level(const char *cmd, int *rc)
6071 {
6072         int level;
6073
6074         if (strlencmp(cmd, "level auto") == 0)
6075                 level = TP_EC_FAN_AUTO;
6076         else if ((strlencmp(cmd, "level disengaged") == 0) |
6077                         (strlencmp(cmd, "level full-speed") == 0))
6078                 level = TP_EC_FAN_FULLSPEED;
6079         else if (sscanf(cmd, "level %d", &level) != 1)
6080                 return 0;
6081
6082         *rc = fan_set_level_safe(level);
6083         if (*rc == -ENXIO)
6084                 printk(TPACPI_ERR "level command accepted for unsupported "
6085                        "access mode %d", fan_control_access_mode);
6086
6087         return 1;
6088 }
6089
6090 static int fan_write_cmd_enable(const char *cmd, int *rc)
6091 {
6092         if (strlencmp(cmd, "enable") != 0)
6093                 return 0;
6094
6095         *rc = fan_set_enable();
6096         if (*rc == -ENXIO)
6097                 printk(TPACPI_ERR "enable command accepted for unsupported "
6098                        "access mode %d", fan_control_access_mode);
6099
6100         return 1;
6101 }
6102
6103 static int fan_write_cmd_disable(const char *cmd, int *rc)
6104 {
6105         if (strlencmp(cmd, "disable") != 0)
6106                 return 0;
6107
6108         *rc = fan_set_disable();
6109         if (*rc == -ENXIO)
6110                 printk(TPACPI_ERR "disable command accepted for unsupported "
6111                        "access mode %d", fan_control_access_mode);
6112
6113         return 1;
6114 }
6115
6116 static int fan_write_cmd_speed(const char *cmd, int *rc)
6117 {
6118         int speed;
6119
6120         /* TODO:
6121          * Support speed <low> <medium> <high> ? */
6122
6123         if (sscanf(cmd, "speed %d", &speed) != 1)
6124                 return 0;
6125
6126         *rc = fan_set_speed(speed);
6127         if (*rc == -ENXIO)
6128                 printk(TPACPI_ERR "speed command accepted for unsupported "
6129                        "access mode %d", fan_control_access_mode);
6130
6131         return 1;
6132 }
6133
6134 static int fan_write_cmd_watchdog(const char *cmd, int *rc)
6135 {
6136         int interval;
6137
6138         if (sscanf(cmd, "watchdog %d", &interval) != 1)
6139                 return 0;
6140
6141         if (interval < 0 || interval > 120)
6142                 *rc = -EINVAL;
6143         else
6144                 fan_watchdog_maxinterval = interval;
6145
6146         return 1;
6147 }
6148
6149 static int fan_write(char *buf)
6150 {
6151         char *cmd;
6152         int rc = 0;
6153
6154         while (!rc && (cmd = next_cmd(&buf))) {
6155                 if (!((fan_control_commands & TPACPI_FAN_CMD_LEVEL) &&
6156                       fan_write_cmd_level(cmd, &rc)) &&
6157                     !((fan_control_commands & TPACPI_FAN_CMD_ENABLE) &&
6158                       (fan_write_cmd_enable(cmd, &rc) ||
6159                        fan_write_cmd_disable(cmd, &rc) ||
6160                        fan_write_cmd_watchdog(cmd, &rc))) &&
6161                     !((fan_control_commands & TPACPI_FAN_CMD_SPEED) &&
6162                       fan_write_cmd_speed(cmd, &rc))
6163                     )
6164                         rc = -EINVAL;
6165                 else if (!rc)
6166                         fan_watchdog_reset();
6167         }
6168
6169         return rc;
6170 }
6171
6172 static struct ibm_struct fan_driver_data = {
6173         .name = "fan",
6174         .read = fan_read,
6175         .write = fan_write,
6176         .exit = fan_exit,
6177 };
6178
6179 /****************************************************************************
6180  ****************************************************************************
6181  *
6182  * Infrastructure
6183  *
6184  ****************************************************************************
6185  ****************************************************************************/
6186
6187 /* sysfs name ---------------------------------------------------------- */
6188 static ssize_t thinkpad_acpi_pdev_name_show(struct device *dev,
6189                            struct device_attribute *attr,
6190                            char *buf)
6191 {
6192         return snprintf(buf, PAGE_SIZE, "%s\n", TPACPI_NAME);
6193 }
6194
6195 static struct device_attribute dev_attr_thinkpad_acpi_pdev_name =
6196         __ATTR(name, S_IRUGO, thinkpad_acpi_pdev_name_show, NULL);
6197
6198 /* --------------------------------------------------------------------- */
6199
6200 /* /proc support */
6201 static struct proc_dir_entry *proc_dir;
6202
6203 /*
6204  * Module and infrastructure proble, init and exit handling
6205  */
6206
6207 static int force_load;
6208
6209 #ifdef CONFIG_THINKPAD_ACPI_DEBUG
6210 static const char * __init str_supported(int is_supported)
6211 {
6212         static char text_unsupported[] __initdata = "not supported";
6213
6214         return (is_supported)? &text_unsupported[4] : &text_unsupported[0];
6215 }
6216 #endif /* CONFIG_THINKPAD_ACPI_DEBUG */
6217
6218 static void ibm_exit(struct ibm_struct *ibm)
6219 {
6220         dbg_printk(TPACPI_DBG_EXIT, "removing %s\n", ibm->name);
6221
6222         list_del_init(&ibm->all_drivers);
6223
6224         if (ibm->flags.acpi_notify_installed) {
6225                 dbg_printk(TPACPI_DBG_EXIT,
6226                         "%s: acpi_remove_notify_handler\n", ibm->name);
6227                 BUG_ON(!ibm->acpi);
6228                 acpi_remove_notify_handler(*ibm->acpi->handle,
6229                                            ibm->acpi->type,
6230                                            dispatch_acpi_notify);
6231                 ibm->flags.acpi_notify_installed = 0;
6232                 ibm->flags.acpi_notify_installed = 0;
6233         }
6234
6235         if (ibm->flags.proc_created) {
6236                 dbg_printk(TPACPI_DBG_EXIT,
6237                         "%s: remove_proc_entry\n", ibm->name);
6238                 remove_proc_entry(ibm->name, proc_dir);
6239                 ibm->flags.proc_created = 0;
6240         }
6241
6242         if (ibm->flags.acpi_driver_registered) {
6243                 dbg_printk(TPACPI_DBG_EXIT,
6244                         "%s: acpi_bus_unregister_driver\n", ibm->name);
6245                 BUG_ON(!ibm->acpi);
6246                 acpi_bus_unregister_driver(ibm->acpi->driver);
6247                 kfree(ibm->acpi->driver);
6248                 ibm->acpi->driver = NULL;
6249                 ibm->flags.acpi_driver_registered = 0;
6250         }
6251
6252         if (ibm->flags.init_called && ibm->exit) {
6253                 ibm->exit();
6254                 ibm->flags.init_called = 0;
6255         }
6256
6257         dbg_printk(TPACPI_DBG_INIT, "finished removing %s\n", ibm->name);
6258 }
6259
6260 static int __init ibm_init(struct ibm_init_struct *iibm)
6261 {
6262         int ret;
6263         struct ibm_struct *ibm = iibm->data;
6264         struct proc_dir_entry *entry;
6265
6266         BUG_ON(ibm == NULL);
6267
6268         INIT_LIST_HEAD(&ibm->all_drivers);
6269
6270         if (ibm->flags.experimental && !experimental)
6271                 return 0;
6272
6273         dbg_printk(TPACPI_DBG_INIT,
6274                 "probing for %s\n", ibm->name);
6275
6276         if (iibm->init) {
6277                 ret = iibm->init(iibm);
6278                 if (ret > 0)
6279                         return 0;       /* probe failed */
6280                 if (ret)
6281                         return ret;
6282
6283                 ibm->flags.init_called = 1;
6284         }
6285
6286         if (ibm->acpi) {
6287                 if (ibm->acpi->hid) {
6288                         ret = register_tpacpi_subdriver(ibm);
6289                         if (ret)
6290                                 goto err_out;
6291                 }
6292
6293                 if (ibm->acpi->notify) {
6294                         ret = setup_acpi_notify(ibm);
6295                         if (ret == -ENODEV) {
6296                                 printk(TPACPI_NOTICE "disabling subdriver %s\n",
6297                                         ibm->name);
6298                                 ret = 0;
6299                                 goto err_out;
6300                         }
6301                         if (ret < 0)
6302                                 goto err_out;
6303                 }
6304         }
6305
6306         dbg_printk(TPACPI_DBG_INIT,
6307                 "%s installed\n", ibm->name);
6308
6309         if (ibm->read) {
6310                 entry = create_proc_entry(ibm->name,
6311                                           S_IFREG | S_IRUGO | S_IWUSR,
6312                                           proc_dir);
6313                 if (!entry) {
6314                         printk(TPACPI_ERR "unable to create proc entry %s\n",
6315                                ibm->name);
6316                         ret = -ENODEV;
6317                         goto err_out;
6318                 }
6319                 entry->owner = THIS_MODULE;
6320                 entry->data = ibm;
6321                 entry->read_proc = &dispatch_procfs_read;
6322                 if (ibm->write)
6323                         entry->write_proc = &dispatch_procfs_write;
6324                 ibm->flags.proc_created = 1;
6325         }
6326
6327         list_add_tail(&ibm->all_drivers, &tpacpi_all_drivers);
6328
6329         return 0;
6330
6331 err_out:
6332         dbg_printk(TPACPI_DBG_INIT,
6333                 "%s: at error exit path with result %d\n",
6334                 ibm->name, ret);
6335
6336         ibm_exit(ibm);
6337         return (ret < 0)? ret : 0;
6338 }
6339
6340 /* Probing */
6341
6342 /* returns 0 - probe ok, or < 0 - probe error.
6343  * Probe ok doesn't mean thinkpad found.
6344  * On error, kfree() cleanup on tp->* is not performed, caller must do it */
6345 static int __must_check __init get_thinkpad_model_data(
6346                                                 struct thinkpad_id_data *tp)
6347 {
6348         const struct dmi_device *dev = NULL;
6349         char ec_fw_string[18];
6350         char const *s;
6351
6352         if (!tp)
6353                 return -EINVAL;
6354
6355         memset(tp, 0, sizeof(*tp));
6356
6357         if (dmi_name_in_vendors("IBM"))
6358                 tp->vendor = PCI_VENDOR_ID_IBM;
6359         else if (dmi_name_in_vendors("LENOVO"))
6360                 tp->vendor = PCI_VENDOR_ID_LENOVO;
6361         else
6362                 return 0;
6363
6364         s = dmi_get_system_info(DMI_BIOS_VERSION);
6365         tp->bios_version_str = kstrdup(s, GFP_KERNEL);
6366         if (s && !tp->bios_version_str)
6367                 return -ENOMEM;
6368         if (!tp->bios_version_str)
6369                 return 0;
6370         tp->bios_model = tp->bios_version_str[0]
6371                          | (tp->bios_version_str[1] << 8);
6372
6373         /*
6374          * ThinkPad T23 or newer, A31 or newer, R50e or newer,
6375          * X32 or newer, all Z series;  Some models must have an
6376          * up-to-date BIOS or they will not be detected.
6377          *
6378          * See http://thinkwiki.org/wiki/List_of_DMI_IDs
6379          */
6380         while ((dev = dmi_find_device(DMI_DEV_TYPE_OEM_STRING, NULL, dev))) {
6381                 if (sscanf(dev->name,
6382                            "IBM ThinkPad Embedded Controller -[%17c",
6383                            ec_fw_string) == 1) {
6384                         ec_fw_string[sizeof(ec_fw_string) - 1] = 0;
6385                         ec_fw_string[strcspn(ec_fw_string, " ]")] = 0;
6386
6387                         tp->ec_version_str = kstrdup(ec_fw_string, GFP_KERNEL);
6388                         if (!tp->ec_version_str)
6389                                 return -ENOMEM;
6390                         tp->ec_model = ec_fw_string[0]
6391                                         | (ec_fw_string[1] << 8);
6392                         break;
6393                 }
6394         }
6395
6396         s = dmi_get_system_info(DMI_PRODUCT_VERSION);
6397         if (s && !strnicmp(s, "ThinkPad", 8)) {
6398                 tp->model_str = kstrdup(s, GFP_KERNEL);
6399                 if (!tp->model_str)
6400                         return -ENOMEM;
6401         }
6402
6403         s = dmi_get_system_info(DMI_PRODUCT_NAME);
6404         tp->nummodel_str = kstrdup(s, GFP_KERNEL);
6405         if (s && !tp->nummodel_str)
6406                 return -ENOMEM;
6407
6408         return 0;
6409 }
6410
6411 static int __init probe_for_thinkpad(void)
6412 {
6413         int is_thinkpad;
6414
6415         if (acpi_disabled)
6416                 return -ENODEV;
6417
6418         /*
6419          * Non-ancient models have better DMI tagging, but very old models
6420          * don't.
6421          */
6422         is_thinkpad = (thinkpad_id.model_str != NULL);
6423
6424         /* ec is required because many other handles are relative to it */
6425         TPACPI_ACPIHANDLE_INIT(ec);
6426         if (!ec_handle) {
6427                 if (is_thinkpad)
6428                         printk(TPACPI_ERR
6429                                 "Not yet supported ThinkPad detected!\n");
6430                 return -ENODEV;
6431         }
6432
6433         /*
6434          * Risks a regression on very old machines, but reduces potential
6435          * false positives a damn great deal
6436          */
6437         if (!is_thinkpad)
6438                 is_thinkpad = (thinkpad_id.vendor == PCI_VENDOR_ID_IBM);
6439
6440         if (!is_thinkpad && !force_load)
6441                 return -ENODEV;
6442
6443         return 0;
6444 }
6445
6446
6447 /* Module init, exit, parameters */
6448
6449 static struct ibm_init_struct ibms_init[] __initdata = {
6450         {
6451                 .init = thinkpad_acpi_driver_init,
6452                 .data = &thinkpad_acpi_driver_data,
6453         },
6454         {
6455                 .init = hotkey_init,
6456                 .data = &hotkey_driver_data,
6457         },
6458         {
6459                 .init = bluetooth_init,
6460                 .data = &bluetooth_driver_data,
6461         },
6462         {
6463                 .init = wan_init,
6464                 .data = &wan_driver_data,
6465         },
6466 #ifdef CONFIG_THINKPAD_ACPI_VIDEO
6467         {
6468                 .init = video_init,
6469                 .data = &video_driver_data,
6470         },
6471 #endif
6472         {
6473                 .init = light_init,
6474                 .data = &light_driver_data,
6475         },
6476 #ifdef CONFIG_THINKPAD_ACPI_DOCK
6477         {
6478                 .init = dock_init,
6479                 .data = &dock_driver_data[0],
6480         },
6481         {
6482                 .init = dock_init2,
6483                 .data = &dock_driver_data[1],
6484         },
6485 #endif
6486 #ifdef CONFIG_THINKPAD_ACPI_BAY
6487         {
6488                 .init = bay_init,
6489                 .data = &bay_driver_data,
6490         },
6491 #endif
6492         {
6493                 .init = cmos_init,
6494                 .data = &cmos_driver_data,
6495         },
6496         {
6497                 .init = led_init,
6498                 .data = &led_driver_data,
6499         },
6500         {
6501                 .init = beep_init,
6502                 .data = &beep_driver_data,
6503         },
6504         {
6505                 .init = thermal_init,
6506                 .data = &thermal_driver_data,
6507         },
6508         {
6509                 .data = &ecdump_driver_data,
6510         },
6511         {
6512                 .init = brightness_init,
6513                 .data = &brightness_driver_data,
6514         },
6515         {
6516                 .data = &volume_driver_data,
6517         },
6518         {
6519                 .init = fan_init,
6520                 .data = &fan_driver_data,
6521         },
6522 };
6523
6524 static int __init set_ibm_param(const char *val, struct kernel_param *kp)
6525 {
6526         unsigned int i;
6527         struct ibm_struct *ibm;
6528
6529         if (!kp || !kp->name || !val)
6530                 return -EINVAL;
6531
6532         for (i = 0; i < ARRAY_SIZE(ibms_init); i++) {
6533                 ibm = ibms_init[i].data;
6534                 WARN_ON(ibm == NULL);
6535
6536                 if (!ibm || !ibm->name)
6537                         continue;
6538
6539                 if (strcmp(ibm->name, kp->name) == 0 && ibm->write) {
6540                         if (strlen(val) > sizeof(ibms_init[i].param) - 2)
6541                                 return -ENOSPC;
6542                         strcpy(ibms_init[i].param, val);
6543                         strcat(ibms_init[i].param, ",");
6544                         return 0;
6545                 }
6546         }
6547
6548         return -EINVAL;
6549 }
6550
6551 module_param(experimental, int, 0);
6552 MODULE_PARM_DESC(experimental,
6553                  "Enables experimental features when non-zero");
6554
6555 module_param_named(debug, dbg_level, uint, 0);
6556 MODULE_PARM_DESC(debug, "Sets debug level bit-mask");
6557
6558 module_param(force_load, bool, 0);
6559 MODULE_PARM_DESC(force_load,
6560                  "Attempts to load the driver even on a "
6561                  "mis-identified ThinkPad when true");
6562
6563 module_param_named(fan_control, fan_control_allowed, bool, 0);
6564 MODULE_PARM_DESC(fan_control,
6565                  "Enables setting fan parameters features when true");
6566
6567 module_param_named(brightness_mode, brightness_mode, int, 0);
6568 MODULE_PARM_DESC(brightness_mode,
6569                  "Selects brightness control strategy: "
6570                  "0=auto, 1=EC, 2=CMOS, 3=both");
6571
6572 module_param(brightness_enable, uint, 0);
6573 MODULE_PARM_DESC(brightness_enable,
6574                  "Enables backlight control when 1, disables when 0");
6575
6576 module_param(hotkey_report_mode, uint, 0);
6577 MODULE_PARM_DESC(hotkey_report_mode,
6578                  "used for backwards compatibility with userspace, "
6579                  "see documentation");
6580
6581 #define TPACPI_PARAM(feature) \
6582         module_param_call(feature, set_ibm_param, NULL, NULL, 0); \
6583         MODULE_PARM_DESC(feature, "Simulates thinkpad-acpi procfs command " \
6584                          "at module load, see documentation")
6585
6586 TPACPI_PARAM(hotkey);
6587 TPACPI_PARAM(bluetooth);
6588 TPACPI_PARAM(video);
6589 TPACPI_PARAM(light);
6590 #ifdef CONFIG_THINKPAD_ACPI_DOCK
6591 TPACPI_PARAM(dock);
6592 #endif
6593 #ifdef CONFIG_THINKPAD_ACPI_BAY
6594 TPACPI_PARAM(bay);
6595 #endif /* CONFIG_THINKPAD_ACPI_BAY */
6596 TPACPI_PARAM(cmos);
6597 TPACPI_PARAM(led);
6598 TPACPI_PARAM(beep);
6599 TPACPI_PARAM(ecdump);
6600 TPACPI_PARAM(brightness);
6601 TPACPI_PARAM(volume);
6602 TPACPI_PARAM(fan);
6603
6604 static void thinkpad_acpi_module_exit(void)
6605 {
6606         struct ibm_struct *ibm, *itmp;
6607
6608         tpacpi_lifecycle = TPACPI_LIFE_EXITING;
6609
6610         list_for_each_entry_safe_reverse(ibm, itmp,
6611                                          &tpacpi_all_drivers,
6612                                          all_drivers) {
6613                 ibm_exit(ibm);
6614         }
6615
6616         dbg_printk(TPACPI_DBG_INIT, "finished subdriver exit path...\n");
6617
6618         if (tpacpi_inputdev) {
6619                 if (tp_features.input_device_registered)
6620                         input_unregister_device(tpacpi_inputdev);
6621                 else
6622                         input_free_device(tpacpi_inputdev);
6623         }
6624
6625         if (tpacpi_hwmon)
6626                 hwmon_device_unregister(tpacpi_hwmon);
6627
6628         if (tp_features.sensors_pdev_attrs_registered)
6629                 device_remove_file(&tpacpi_sensors_pdev->dev,
6630                                    &dev_attr_thinkpad_acpi_pdev_name);
6631         if (tpacpi_sensors_pdev)
6632                 platform_device_unregister(tpacpi_sensors_pdev);
6633         if (tpacpi_pdev)
6634                 platform_device_unregister(tpacpi_pdev);
6635
6636         if (tp_features.sensors_pdrv_attrs_registered)
6637                 tpacpi_remove_driver_attributes(&tpacpi_hwmon_pdriver.driver);
6638         if (tp_features.platform_drv_attrs_registered)
6639                 tpacpi_remove_driver_attributes(&tpacpi_pdriver.driver);
6640
6641         if (tp_features.sensors_pdrv_registered)
6642                 platform_driver_unregister(&tpacpi_hwmon_pdriver);
6643
6644         if (tp_features.platform_drv_registered)
6645                 platform_driver_unregister(&tpacpi_pdriver);
6646
6647         if (proc_dir)
6648                 remove_proc_entry(TPACPI_PROC_DIR, acpi_root_dir);
6649
6650         if (tpacpi_wq)
6651                 destroy_workqueue(tpacpi_wq);
6652
6653         kfree(thinkpad_id.bios_version_str);
6654         kfree(thinkpad_id.ec_version_str);
6655         kfree(thinkpad_id.model_str);
6656 }
6657
6658
6659 static int __init thinkpad_acpi_module_init(void)
6660 {
6661         int ret, i;
6662
6663         tpacpi_lifecycle = TPACPI_LIFE_INIT;
6664
6665         /* Parameter checking */
6666         if (hotkey_report_mode > 2)
6667                 return -EINVAL;
6668
6669         /* Driver-level probe */
6670
6671         ret = get_thinkpad_model_data(&thinkpad_id);
6672         if (ret) {
6673                 printk(TPACPI_ERR
6674                         "unable to get DMI data: %d\n", ret);
6675                 thinkpad_acpi_module_exit();
6676                 return ret;
6677         }
6678         ret = probe_for_thinkpad();
6679         if (ret) {
6680                 thinkpad_acpi_module_exit();
6681                 return ret;
6682         }
6683
6684         /* Driver initialization */
6685
6686         TPACPI_ACPIHANDLE_INIT(ecrd);
6687         TPACPI_ACPIHANDLE_INIT(ecwr);
6688
6689         tpacpi_wq = create_singlethread_workqueue(TPACPI_WORKQUEUE_NAME);
6690         if (!tpacpi_wq) {
6691                 thinkpad_acpi_module_exit();
6692                 return -ENOMEM;
6693         }
6694
6695         proc_dir = proc_mkdir(TPACPI_PROC_DIR, acpi_root_dir);
6696         if (!proc_dir) {
6697                 printk(TPACPI_ERR
6698                        "unable to create proc dir " TPACPI_PROC_DIR);
6699                 thinkpad_acpi_module_exit();
6700                 return -ENODEV;
6701         }
6702         proc_dir->owner = THIS_MODULE;
6703
6704         ret = platform_driver_register(&tpacpi_pdriver);
6705         if (ret) {
6706                 printk(TPACPI_ERR
6707                        "unable to register main platform driver\n");
6708                 thinkpad_acpi_module_exit();
6709                 return ret;
6710         }
6711         tp_features.platform_drv_registered = 1;
6712
6713         ret = platform_driver_register(&tpacpi_hwmon_pdriver);
6714         if (ret) {
6715                 printk(TPACPI_ERR
6716                        "unable to register hwmon platform driver\n");
6717                 thinkpad_acpi_module_exit();
6718                 return ret;
6719         }
6720         tp_features.sensors_pdrv_registered = 1;
6721
6722         ret = tpacpi_create_driver_attributes(&tpacpi_pdriver.driver);
6723         if (!ret) {
6724                 tp_features.platform_drv_attrs_registered = 1;
6725                 ret = tpacpi_create_driver_attributes(
6726                                         &tpacpi_hwmon_pdriver.driver);
6727         }
6728         if (ret) {
6729                 printk(TPACPI_ERR
6730                        "unable to create sysfs driver attributes\n");
6731                 thinkpad_acpi_module_exit();
6732                 return ret;
6733         }
6734         tp_features.sensors_pdrv_attrs_registered = 1;
6735
6736
6737         /* Device initialization */
6738         tpacpi_pdev = platform_device_register_simple(TPACPI_DRVR_NAME, -1,
6739                                                         NULL, 0);
6740         if (IS_ERR(tpacpi_pdev)) {
6741                 ret = PTR_ERR(tpacpi_pdev);
6742                 tpacpi_pdev = NULL;
6743                 printk(TPACPI_ERR "unable to register platform device\n");
6744                 thinkpad_acpi_module_exit();
6745                 return ret;
6746         }
6747         tpacpi_sensors_pdev = platform_device_register_simple(
6748                                                 TPACPI_HWMON_DRVR_NAME,
6749                                                 -1, NULL, 0);
6750         if (IS_ERR(tpacpi_sensors_pdev)) {
6751                 ret = PTR_ERR(tpacpi_sensors_pdev);
6752                 tpacpi_sensors_pdev = NULL;
6753                 printk(TPACPI_ERR
6754                        "unable to register hwmon platform device\n");
6755                 thinkpad_acpi_module_exit();
6756                 return ret;
6757         }
6758         ret = device_create_file(&tpacpi_sensors_pdev->dev,
6759                                  &dev_attr_thinkpad_acpi_pdev_name);
6760         if (ret) {
6761                 printk(TPACPI_ERR
6762                        "unable to create sysfs hwmon device attributes\n");
6763                 thinkpad_acpi_module_exit();
6764                 return ret;
6765         }
6766         tp_features.sensors_pdev_attrs_registered = 1;
6767         tpacpi_hwmon = hwmon_device_register(&tpacpi_sensors_pdev->dev);
6768         if (IS_ERR(tpacpi_hwmon)) {
6769                 ret = PTR_ERR(tpacpi_hwmon);
6770                 tpacpi_hwmon = NULL;
6771                 printk(TPACPI_ERR "unable to register hwmon device\n");
6772                 thinkpad_acpi_module_exit();
6773                 return ret;
6774         }
6775         mutex_init(&tpacpi_inputdev_send_mutex);
6776         tpacpi_inputdev = input_allocate_device();
6777         if (!tpacpi_inputdev) {
6778                 printk(TPACPI_ERR "unable to allocate input device\n");
6779                 thinkpad_acpi_module_exit();
6780                 return -ENOMEM;
6781         } else {
6782                 /* Prepare input device, but don't register */
6783                 tpacpi_inputdev->name = "ThinkPad Extra Buttons";
6784                 tpacpi_inputdev->phys = TPACPI_DRVR_NAME "/input0";
6785                 tpacpi_inputdev->id.bustype = BUS_HOST;
6786                 tpacpi_inputdev->id.vendor = (thinkpad_id.vendor) ?
6787                                                 thinkpad_id.vendor :
6788                                                 PCI_VENDOR_ID_IBM;
6789                 tpacpi_inputdev->id.product = TPACPI_HKEY_INPUT_PRODUCT;
6790                 tpacpi_inputdev->id.version = TPACPI_HKEY_INPUT_VERSION;
6791         }
6792         for (i = 0; i < ARRAY_SIZE(ibms_init); i++) {
6793                 ret = ibm_init(&ibms_init[i]);
6794                 if (ret >= 0 && *ibms_init[i].param)
6795                         ret = ibms_init[i].data->write(ibms_init[i].param);
6796                 if (ret < 0) {
6797                         thinkpad_acpi_module_exit();
6798                         return ret;
6799                 }
6800         }
6801         ret = input_register_device(tpacpi_inputdev);
6802         if (ret < 0) {
6803                 printk(TPACPI_ERR "unable to register input device\n");
6804                 thinkpad_acpi_module_exit();
6805                 return ret;
6806         } else {
6807                 tp_features.input_device_registered = 1;
6808         }
6809
6810         tpacpi_lifecycle = TPACPI_LIFE_RUNNING;
6811         return 0;
6812 }
6813
6814 /* Please remove this in year 2009 */
6815 MODULE_ALIAS("ibm_acpi");
6816
6817 MODULE_ALIAS(TPACPI_DRVR_SHORTNAME);
6818
6819 /*
6820  * DMI matching for module autoloading
6821  *
6822  * See http://thinkwiki.org/wiki/List_of_DMI_IDs
6823  * See http://thinkwiki.org/wiki/BIOS_Upgrade_Downloads
6824  *
6825  * Only models listed in thinkwiki will be supported, so add yours
6826  * if it is not there yet.
6827  */
6828 #define IBM_BIOS_MODULE_ALIAS(__type) \
6829         MODULE_ALIAS("dmi:bvnIBM:bvr" __type "ET??WW")
6830
6831 /* Non-ancient thinkpads */
6832 MODULE_ALIAS("dmi:bvnIBM:*:svnIBM:*:pvrThinkPad*:rvnIBM:*");
6833 MODULE_ALIAS("dmi:bvnLENOVO:*:svnLENOVO:*:pvrThinkPad*:rvnLENOVO:*");
6834
6835 /* Ancient thinkpad BIOSes have to be identified by
6836  * BIOS type or model number, and there are far less
6837  * BIOS types than model numbers... */
6838 IBM_BIOS_MODULE_ALIAS("I[B,D,H,I,M,N,O,T,W,V,Y,Z]");
6839 IBM_BIOS_MODULE_ALIAS("1[0,3,6,8,A-G,I,K,M-P,S,T]");
6840 IBM_BIOS_MODULE_ALIAS("K[U,X-Z]");
6841
6842 MODULE_AUTHOR("Borislav Deianov, Henrique de Moraes Holschuh");
6843 MODULE_DESCRIPTION(TPACPI_DESC);
6844 MODULE_VERSION(TPACPI_VERSION);
6845 MODULE_LICENSE("GPL");
6846
6847 module_init(thinkpad_acpi_module_init);
6848 module_exit(thinkpad_acpi_module_exit);