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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) 2006-2007 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 IBM_VERSION "0.18"
  25 #define TPACPI_SYSFS_VERSION 0x020101
  26
  27 /*
  28  *  Changelog:
  29  *  2007-03-27  0.14    renamed to thinkpad_acpi and moved to
  30  *                      drivers/misc.
  31  *
  32  *  2006-11-22  0.13    new maintainer
  33  *                      changelog now lives in git commit history, and will
  34  *                      not be updated further in-file.
  35  *
  36  *  2005-08-17  0.12    fix compilation on 2.6.13-rc kernels
  37  *  2005-03-17  0.11    support for 600e, 770x
  38  *                          thanks to Jamie Lentin <lentinj@dial.pipex.com>
  39  *                      support for 770e, G41
  40  *                      G40 and G41 don't have a thinklight
  41  *                      temperatures no longer experimental
  42  *                      experimental brightness control
  43  *                      experimental volume control
  44  *                      experimental fan enable/disable
  45  *  2005-01-16  0.10    fix module loading on R30, R31
  46  *  2005-01-16  0.9     support for 570, R30, R31
  47  *                      ultrabay support on A22p, A3x
  48  *                      limit arg for cmos, led, beep, drop experimental status
  49  *                      more capable led control on A21e, A22p, T20-22, X20
  50  *                      experimental temperatures and fan speed
  51  *                      experimental embedded controller register dump
  52  *                      mark more functions as __init, drop incorrect __exit
  53  *                      use MODULE_VERSION
  54  *                          thanks to Henrik Brix Andersen <brix@gentoo.org>
  55  *                      fix parameter passing on module loading
  56  *                          thanks to Rusty Russell <rusty@rustcorp.com.au>
  57  *                          thanks to Jim Radford <radford@blackbean.org>
  58  *  2004-11-08  0.8     fix init error case, don't return from a macro
  59  *                          thanks to Chris Wright <chrisw@osdl.org>
  60  *  2004-10-23  0.7     fix module loading on A21e, A22p, T20, T21, X20
  61  *                      fix led control on A21e
  62  *  2004-10-19  0.6     use acpi_bus_register_driver() to claim HKEY device
  63  *  2004-10-18  0.5     thinklight support on A21e, G40, R32, T20, T21, X20
  64  *                      proc file format changed
  65  *                      video_switch command
  66  *                      experimental cmos control
  67  *                      experimental led control
  68  *                      experimental acpi sounds
  69  *  2004-09-16  0.4     support for module parameters
  70  *                      hotkey mask can be prefixed by 0x
  71  *                      video output switching
  72  *                      video expansion control
  73  *                      ultrabay eject support
  74  *                      removed lcd brightness/on/off control, didn't work
  75  *  2004-08-17  0.3     support for R40
  76  *                      lcd off, brightness control
  77  *                      thinklight on/off
  78  *  2004-08-14  0.2     support for T series, X20
  79  *                      bluetooth enable/disable
  80  *                      hotkey events disabled by default
  81  *                      removed fan control, currently useless
  82  *  2004-08-09  0.1     initial release, support for X series
  83  */
  84
  85 /* ==================================================== BEGIN HEADER */
  86
  87 #include <linux/kernel.h>
  88 #include <linux/module.h>
  89 #include <linux/init.h>
  90 #include <linux/types.h>
  91 #include <linux/string.h>
  92 #include <linux/list.h>
  93 #include <linux/mutex.h>
  94 #include <linux/kthread.h>
  95 #include <linux/freezer.h>
  96 #include <linux/delay.h>
  97
  98 #include <linux/nvram.h>
  99 #include <linux/proc_fs.h>
 100 #include <linux/sysfs.h>
 101 #include <linux/backlight.h>
 102 #include <linux/fb.h>
 103 #include <linux/platform_device.h>
 104 #include <linux/hwmon.h>
 105 #include <linux/hwmon-sysfs.h>
 106 #include <linux/input.h>
 107 #include <asm/uaccess.h>
 108
 109 #include <linux/dmi.h>
 110 #include <linux/jiffies.h>
 111 #include <linux/workqueue.h>
 112
 113 #include <acpi/acpi_drivers.h>
 114 #include <acpi/acnamesp.h>
 115
 116 #include <linux/pci_ids.h>
 117
 118 /****************************************************************************
 119  * Main driver
 120  */
 121
 122 #define IBM_NAME "thinkpad"
 123 #define IBM_DESC "ThinkPad ACPI Extras"
 124 #define IBM_FILE IBM_NAME "_acpi"
 125 #define IBM_URL "http://ibm-acpi.sf.net/"
 126 #define IBM_MAIL "ibm-acpi-devel@lists.sourceforge.net"
 127
 128 #define IBM_PROC_DIR "ibm"
 129 #define IBM_ACPI_EVENT_PREFIX "ibm"
 130 #define IBM_DRVR_NAME IBM_FILE
 131 #define IBM_HWMON_DRVR_NAME IBM_NAME "_hwmon"
 132
 133 #define IBM_LOG IBM_FILE ": "
 134 #define IBM_ERR    KERN_ERR    IBM_LOG
 135 #define IBM_NOTICE KERN_NOTICE IBM_LOG
 136 #define IBM_INFO   KERN_INFO   IBM_LOG
 137 #define IBM_DEBUG  KERN_DEBUG  IBM_LOG
 138
 139 #define IBM_MAX_ACPI_ARGS 3
 140
 141 /* ThinkPad CMOS commands */
 142 #define TP_CMOS_VOLUME_DOWN     0
 143 #define TP_CMOS_VOLUME_UP       1
 144 #define TP_CMOS_VOLUME_MUTE     2
 145 #define TP_CMOS_BRIGHTNESS_UP   4
 146 #define TP_CMOS_BRIGHTNESS_DOWN 5
 147
 148 /* NVRAM Addresses */
 149 enum tp_nvram_addr {
 150         TP_NVRAM_ADDR_HK2               = 0x57,
 151         TP_NVRAM_ADDR_THINKLIGHT        = 0x58,
 152         TP_NVRAM_ADDR_VIDEO             = 0x59,
 153         TP_NVRAM_ADDR_BRIGHTNESS        = 0x5e,
 154         TP_NVRAM_ADDR_MIXER             = 0x60,
 155 };
 156
 157 /* NVRAM bit masks */
 158 enum {
 159         TP_NVRAM_MASK_HKT_THINKPAD      = 0x08,
 160         TP_NVRAM_MASK_HKT_ZOOM          = 0x20,
 161         TP_NVRAM_MASK_HKT_DISPLAY       = 0x40,
 162         TP_NVRAM_MASK_HKT_HIBERNATE     = 0x80,
 163         TP_NVRAM_MASK_THINKLIGHT        = 0x10,
 164         TP_NVRAM_MASK_HKT_DISPEXPND     = 0x30,
 165         TP_NVRAM_MASK_HKT_BRIGHTNESS    = 0x20,
 166         TP_NVRAM_MASK_LEVEL_BRIGHTNESS  = 0x0f,
 167         TP_NVRAM_POS_LEVEL_BRIGHTNESS   = 0,
 168         TP_NVRAM_MASK_MUTE              = 0x40,
 169         TP_NVRAM_MASK_HKT_VOLUME        = 0x80,
 170         TP_NVRAM_MASK_LEVEL_VOLUME      = 0x0f,
 171         TP_NVRAM_POS_LEVEL_VOLUME       = 0,
 172 };
 173
 174 #define onoff(status,bit) ((status) & (1 << (bit)) ? "on" : "off")
 175 #define enabled(status,bit) ((status) & (1 << (bit)) ? "enabled" : "disabled")
 176 #define strlencmp(a,b) (strncmp((a), (b), strlen(b)))
 177
 178 /* Debugging */
 179 #define TPACPI_DBG_ALL          0xffff
 180 #define TPACPI_DBG_ALL          0xffff
 181 #define TPACPI_DBG_INIT         0x0001
 182 #define TPACPI_DBG_EXIT         0x0002
 183 #define dbg_printk(a_dbg_level, format, arg...) \
 184         do { if (dbg_level & a_dbg_level) \
 185                 printk(IBM_DEBUG "%s: " format, __func__ , ## arg); } while (0)
 186 #ifdef CONFIG_THINKPAD_ACPI_DEBUG
 187 #define vdbg_printk(a_dbg_level, format, arg...) \
 188         dbg_printk(a_dbg_level, format, ## arg)
 189 static const char *str_supported(int is_supported);
 190 #else
 191 #define vdbg_printk(a_dbg_level, format, arg...)
 192 #endif
 193
 194 /* Input IDs */
 195 #define TPACPI_HKEY_INPUT_VENDOR        PCI_VENDOR_ID_IBM
 196 #define TPACPI_HKEY_INPUT_PRODUCT       0x5054 /* "TP" */
 197 #define TPACPI_HKEY_INPUT_VERSION       0x4101
 198
 199 /* ACPI HIDs */
 200 #define IBM_HKEY_HID    "IBM0068"
 201
 202 /* ACPI helpers */
 203 static int __must_check acpi_evalf(acpi_handle handle,
 204                       void *res, char *method, char *fmt, ...);
 205 static int __must_check acpi_ec_read(int i, u8 * p);
 206 static int __must_check acpi_ec_write(int i, u8 v);
 207 static int __must_check _sta(acpi_handle handle);
 208
 209 /* ACPI handles */
 210 static acpi_handle root_handle;                 /* root namespace */
 211 static acpi_handle ec_handle;                   /* EC */
 212 static acpi_handle ecrd_handle, ecwr_handle;    /* 570 EC access */
 213 static acpi_handle cmos_handle, hkey_handle;    /* basic thinkpad handles */
 214
 215 static void drv_acpi_handle_init(char *name,
 216                    acpi_handle *handle, acpi_handle parent,
 217                    char **paths, int num_paths, char **path);
 218 #define IBM_ACPIHANDLE_INIT(object)                                             \
 219         drv_acpi_handle_init(#object, &object##_handle, *object##_parent,       \
 220                 object##_paths, ARRAY_SIZE(object##_paths), &object##_path)
 221
 222 /* ThinkPad ACPI helpers */
 223 static int issue_thinkpad_cmos_command(int cmos_cmd);
 224
 225 /* procfs support */
 226 static struct proc_dir_entry *proc_dir;
 227
 228 /* procfs helpers */
 229 static int dispatch_procfs_read(char *page, char **start, off_t off,
 230                 int count, int *eof, void *data);
 231 static int dispatch_procfs_write(struct file *file,
 232                 const char __user * userbuf,
 233                 unsigned long count, void *data);
 234 static char *next_cmd(char **cmds);
 235
 236 /* sysfs support */
 237 struct attribute_set {
 238         unsigned int members, max_members;
 239         struct attribute_group group;
 240 };
 241
 242 static struct attribute_set *create_attr_set(unsigned int max_members,
 243                                                 const char* name);
 244 #define destroy_attr_set(_set) \
 245         kfree(_set);
 246 static int add_to_attr_set(struct attribute_set* s, struct attribute *attr);
 247 static int add_many_to_attr_set(struct attribute_set* s,
 248                         struct attribute **attr,
 249                         unsigned int count);
 250 #define register_attr_set_with_sysfs(_attr_set, _kobj) \
 251         sysfs_create_group(_kobj, &_attr_set->group)
 252 static void delete_attr_set(struct attribute_set* s, struct kobject *kobj);
 253
 254 static int parse_strtoul(const char *buf, unsigned long max,
 255                         unsigned long *value);
 256
 257 /* Device model */
 258 static struct platform_device *tpacpi_pdev;
 259 static struct platform_device *tpacpi_sensors_pdev;
 260 static struct device *tpacpi_hwmon;
 261 static struct platform_driver tpacpi_pdriver;
 262 static struct input_dev *tpacpi_inputdev;
 263 static int tpacpi_create_driver_attributes(struct device_driver *drv);
 264 static void tpacpi_remove_driver_attributes(struct device_driver *drv);
 265
 266 /* Module */
 267 static int experimental;
 268 static u32 dbg_level;
 269 static int force_load;
 270 static unsigned int hotkey_report_mode;
 271
 272 static int thinkpad_acpi_module_init(void);
 273 static void thinkpad_acpi_module_exit(void);
 274
 275
 276 /****************************************************************************
 277  * Subdrivers
 278  */
 279
 280 struct ibm_struct;
 281
 282 struct tp_acpi_drv_struct {
 283         const struct acpi_device_id *hid;
 284         struct acpi_driver *driver;
 285
 286         void (*notify) (struct ibm_struct *, u32);
 287         acpi_handle *handle;
 288         u32 type;
 289         struct acpi_device *device;
 290 };
 291
 292 struct ibm_struct {
 293         char *name;
 294
 295         int (*read) (char *);
 296         int (*write) (char *);
 297         void (*exit) (void);
 298         void (*resume) (void);
 299
 300         struct list_head all_drivers;
 301
 302         struct tp_acpi_drv_struct *acpi;
 303
 304         struct {
 305                 u8 acpi_driver_registered:1;
 306                 u8 acpi_notify_installed:1;
 307                 u8 proc_created:1;
 308                 u8 init_called:1;
 309                 u8 experimental:1;
 310         } flags;
 311 };
 312
 313 struct ibm_init_struct {
 314         char param[32];
 315
 316         int (*init) (struct ibm_init_struct *);
 317         struct ibm_struct *data;
 318 };
 319
 320 static struct {
 321 #ifdef CONFIG_THINKPAD_ACPI_BAY
 322         u32 bay_status:1;
 323         u32 bay_eject:1;
 324         u32 bay_status2:1;
 325         u32 bay_eject2:1;
 326 #endif
 327         u32 bluetooth:1;
 328         u32 hotkey:1;
 329         u32 hotkey_mask:1;
 330         u32 hotkey_wlsw:1;
 331         u32 light:1;
 332         u32 light_status:1;
 333         u32 bright_16levels:1;
 334         u32 wan:1;
 335         u32 fan_ctrl_status_undef:1;
 336         u32 input_device_registered:1;
 337         u32 platform_drv_registered:1;
 338         u32 platform_drv_attrs_registered:1;
 339         u32 sensors_pdrv_registered:1;
 340         u32 sensors_pdrv_attrs_registered:1;
 341         u32 sensors_pdev_attrs_registered:1;
 342         u32 hotkey_poll_active:1;
 343 } tp_features;
 344
 345 struct thinkpad_id_data {
 346         unsigned int vendor;    /* ThinkPad vendor:
 347                                  * PCI_VENDOR_ID_IBM/PCI_VENDOR_ID_LENOVO */
 348
 349         char *bios_version_str; /* Something like 1ZET51WW (1.03z) */
 350         char *ec_version_str;   /* Something like 1ZHT51WW-1.04a */
 351
 352         u16 bios_model;         /* Big Endian, TP-1Y = 0x5931, 0 = unknown */
 353         u16 ec_model;
 354
 355         char *model_str;
 356 };
 357
 358 static struct thinkpad_id_data thinkpad_id;
 359
 360 static struct list_head tpacpi_all_drivers;
 361
 362 static struct ibm_init_struct ibms_init[];
 363 static int set_ibm_param(const char *val, struct kernel_param *kp);
 364 static int ibm_init(struct ibm_init_struct *iibm);
 365 static void ibm_exit(struct ibm_struct *ibm);
 366
 367
 368 /*
 369  * procfs master subdriver
 370  */
 371 static int thinkpad_acpi_driver_init(struct ibm_init_struct *iibm);
 372 static int thinkpad_acpi_driver_read(char *p);
 373
 374
 375 /*
 376  * Bay subdriver
 377  */
 378
 379 #ifdef CONFIG_THINKPAD_ACPI_BAY
 380 static acpi_handle bay_handle, bay_ej_handle;
 381 static acpi_handle bay2_handle, bay2_ej_handle;
 382
 383 static int bay_init(struct ibm_init_struct *iibm);
 384 static void bay_notify(struct ibm_struct *ibm, u32 event);
 385 static int bay_read(char *p);
 386 static int bay_write(char *buf);
 387 #endif /* CONFIG_THINKPAD_ACPI_BAY */
 388
 389
 390 /*
 391  * Beep subdriver
 392  */
 393
 394 static acpi_handle beep_handle;
 395
 396 static int beep_read(char *p);
 397 static int beep_write(char *buf);
 398
 399
 400 /*
 401  * Bluetooth subdriver
 402  */
 403
 404 enum {
 405         /* ACPI GBDC/SBDC bits */
 406         TP_ACPI_BLUETOOTH_HWPRESENT     = 0x01, /* Bluetooth hw available */
 407         TP_ACPI_BLUETOOTH_RADIOSSW      = 0x02, /* Bluetooth radio enabled */
 408         TP_ACPI_BLUETOOTH_UNK           = 0x04, /* unknown function */
 409 };
 410
 411 static int bluetooth_init(struct ibm_init_struct *iibm);
 412 static int bluetooth_get_radiosw(void);
 413 static int bluetooth_set_radiosw(int radio_on);
 414 static int bluetooth_read(char *p);
 415 static int bluetooth_write(char *buf);
 416
 417
 418 /*
 419  * Brightness (backlight) subdriver
 420  */
 421
 422 #define TPACPI_BACKLIGHT_DEV_NAME "thinkpad_screen"
 423
 424 static struct backlight_device *ibm_backlight_device;
 425 static int brightness_offset = 0x31;
 426 static int brightness_mode;
 427 static unsigned int brightness_enable;  /* 0 = no, 1 = yes, 2 = auto */
 428
 429 static int brightness_init(struct ibm_init_struct *iibm);
 430 static void brightness_exit(void);
 431 static int brightness_get(struct backlight_device *bd);
 432 static int brightness_set(int value);
 433 static int brightness_update_status(struct backlight_device *bd);
 434 static int brightness_read(char *p);
 435 static int brightness_write(char *buf);
 436
 437
 438 /*
 439  * CMOS subdriver
 440  */
 441
 442 static int cmos_read(char *p);
 443 static int cmos_write(char *buf);
 444
 445
 446 /*
 447  * Dock subdriver
 448  */
 449
 450 #ifdef CONFIG_THINKPAD_ACPI_DOCK
 451 static acpi_handle pci_handle;
 452 static acpi_handle dock_handle;
 453
 454 static void dock_notify(struct ibm_struct *ibm, u32 event);
 455 static int dock_read(char *p);
 456 static int dock_write(char *buf);
 457 #endif /* CONFIG_THINKPAD_ACPI_DOCK */
 458
 459
 460 /*
 461  * EC dump subdriver
 462  */
 463
 464 static int ecdump_read(char *p) ;
 465 static int ecdump_write(char *buf);
 466
 467
 468 /*
 469  * Fan subdriver
 470  */
 471
 472 enum {                                  /* Fan control constants */
 473         fan_status_offset = 0x2f,       /* EC register 0x2f */
 474         fan_rpm_offset = 0x84,          /* EC register 0x84: LSB, 0x85 MSB (RPM)
 475                                          * 0x84 must be read before 0x85 */
 476
 477         TP_EC_FAN_FULLSPEED = 0x40,     /* EC fan mode: full speed */
 478         TP_EC_FAN_AUTO      = 0x80,     /* EC fan mode: auto fan control */
 479
 480         TPACPI_FAN_LAST_LEVEL = 0x100,  /* Use cached last-seen fan level */
 481 };
 482
 483 enum fan_status_access_mode {
 484         TPACPI_FAN_NONE = 0,            /* No fan status or control */
 485         TPACPI_FAN_RD_ACPI_GFAN,        /* Use ACPI GFAN */
 486         TPACPI_FAN_RD_TPEC,             /* Use ACPI EC regs 0x2f, 0x84-0x85 */
 487 };
 488
 489 enum fan_control_access_mode {
 490         TPACPI_FAN_WR_NONE = 0,         /* No fan control */
 491         TPACPI_FAN_WR_ACPI_SFAN,        /* Use ACPI SFAN */
 492         TPACPI_FAN_WR_TPEC,             /* Use ACPI EC reg 0x2f */
 493         TPACPI_FAN_WR_ACPI_FANS,        /* Use ACPI FANS and EC reg 0x2f */
 494 };
 495
 496 enum fan_control_commands {
 497         TPACPI_FAN_CMD_SPEED    = 0x0001,       /* speed command */
 498         TPACPI_FAN_CMD_LEVEL    = 0x0002,       /* level command  */
 499         TPACPI_FAN_CMD_ENABLE   = 0x0004,       /* enable/disable cmd,
 500                                                  * and also watchdog cmd */
 501 };
 502
 503 static int fan_control_allowed;
 504
 505 static enum fan_status_access_mode fan_status_access_mode;
 506 static enum fan_control_access_mode fan_control_access_mode;
 507 static enum fan_control_commands fan_control_commands;
 508 static u8 fan_control_initial_status;
 509 static u8 fan_control_desired_level;
 510 static int fan_watchdog_maxinterval;
 511
 512 static struct mutex fan_mutex;
 513
 514 static acpi_handle fans_handle, gfan_handle, sfan_handle;
 515
 516 static int fan_init(struct ibm_init_struct *iibm);
 517 static void fan_exit(void);
 518 static int fan_get_status(u8 *status);
 519 static int fan_get_status_safe(u8 *status);
 520 static int fan_get_speed(unsigned int *speed);
 521 static void fan_update_desired_level(u8 status);
 522 static void fan_watchdog_fire(struct work_struct *ignored);
 523 static void fan_watchdog_reset(void);
 524 static int fan_set_level(int level);
 525 static int fan_set_level_safe(int level);
 526 static int fan_set_enable(void);
 527 static int fan_set_disable(void);
 528 static int fan_set_speed(int speed);
 529 static int fan_read(char *p);
 530 static int fan_write(char *buf);
 531 static int fan_write_cmd_level(const char *cmd, int *rc);
 532 static int fan_write_cmd_enable(const char *cmd, int *rc);
 533 static int fan_write_cmd_disable(const char *cmd, int *rc);
 534 static int fan_write_cmd_speed(const char *cmd, int *rc);
 535 static int fan_write_cmd_watchdog(const char *cmd, int *rc);
 536
 537
 538 /*
 539  * Hotkey subdriver
 540  */
 541
 542 enum {  /* hot key scan codes (derived from ACPI DSDT) */
 543         TP_ACPI_HOTKEYSCAN_FNF1         = 0,
 544         TP_ACPI_HOTKEYSCAN_FNF2,
 545         TP_ACPI_HOTKEYSCAN_FNF3,
 546         TP_ACPI_HOTKEYSCAN_FNF4,
 547         TP_ACPI_HOTKEYSCAN_FNF5,
 548         TP_ACPI_HOTKEYSCAN_FNF6,
 549         TP_ACPI_HOTKEYSCAN_FNF7,
 550         TP_ACPI_HOTKEYSCAN_FNF8,
 551         TP_ACPI_HOTKEYSCAN_FNF9,
 552         TP_ACPI_HOTKEYSCAN_FNF10,
 553         TP_ACPI_HOTKEYSCAN_FNF11,
 554         TP_ACPI_HOTKEYSCAN_FNF12,
 555         TP_ACPI_HOTKEYSCAN_FNBACKSPACE,
 556         TP_ACPI_HOTKEYSCAN_FNINSERT,
 557         TP_ACPI_HOTKEYSCAN_FNDELETE,
 558         TP_ACPI_HOTKEYSCAN_FNHOME,
 559         TP_ACPI_HOTKEYSCAN_FNEND,
 560         TP_ACPI_HOTKEYSCAN_FNPAGEUP,
 561         TP_ACPI_HOTKEYSCAN_FNPAGEDOWN,
 562         TP_ACPI_HOTKEYSCAN_FNSPACE,
 563         TP_ACPI_HOTKEYSCAN_VOLUMEUP,
 564         TP_ACPI_HOTKEYSCAN_VOLUMEDOWN,
 565         TP_ACPI_HOTKEYSCAN_MUTE,
 566         TP_ACPI_HOTKEYSCAN_THINKPAD,
 567 };
 568
 569 static int hotkey_orig_status;
 570 static u32 hotkey_orig_mask;
 571
 572 static struct mutex hotkey_mutex;
 573
 574 static int hotkey_init(struct ibm_init_struct *iibm);
 575 static void hotkey_exit(void);
 576 static void hotkey_notify(struct ibm_struct *ibm, u32 event);
 577 static int hotkey_read(char *p);
 578 static int hotkey_write(char *buf);
 579
 580
 581 /*
 582  * LED subdriver
 583  */
 584
 585 enum led_access_mode {
 586         TPACPI_LED_NONE = 0,
 587         TPACPI_LED_570, /* 570 */
 588         TPACPI_LED_OLD, /* 600e/x, 770e, 770x, A21e, A2xm/p, T20-22, X20-21 */
 589         TPACPI_LED_NEW, /* all others */
 590 };
 591
 592 enum {  /* For TPACPI_LED_OLD */
 593         TPACPI_LED_EC_HLCL = 0x0c,      /* EC reg to get led to power on */
 594         TPACPI_LED_EC_HLBL = 0x0d,      /* EC reg to blink a lit led */
 595         TPACPI_LED_EC_HLMS = 0x0e,      /* EC reg to select led to command */
 596 };
 597
 598 static enum led_access_mode led_supported;
 599 static acpi_handle led_handle;
 600
 601 static int led_init(struct ibm_init_struct *iibm);
 602 static int led_read(char *p);
 603 static int led_write(char *buf);
 604
 605 /*
 606  * Light (thinklight) subdriver
 607  */
 608
 609 static acpi_handle lght_handle, ledb_handle;
 610
 611 static int light_init(struct ibm_init_struct *iibm);
 612 static int light_read(char *p);
 613 static int light_write(char *buf);
 614
 615
 616 /*
 617  * Thermal subdriver
 618  */
 619
 620 enum thermal_access_mode {
 621         TPACPI_THERMAL_NONE = 0,        /* No thermal support */
 622         TPACPI_THERMAL_ACPI_TMP07,      /* Use ACPI TMP0-7 */
 623         TPACPI_THERMAL_ACPI_UPDT,       /* Use ACPI TMP0-7 with UPDT */
 624         TPACPI_THERMAL_TPEC_8,          /* Use ACPI EC regs, 8 sensors */
 625         TPACPI_THERMAL_TPEC_16,         /* Use ACPI EC regs, 16 sensors */
 626 };
 627
 628 enum { /* TPACPI_THERMAL_TPEC_* */
 629         TP_EC_THERMAL_TMP0 = 0x78,      /* ACPI EC regs TMP 0..7 */
 630         TP_EC_THERMAL_TMP8 = 0xC0,      /* ACPI EC regs TMP 8..15 */
 631         TP_EC_THERMAL_TMP_NA = -128,    /* ACPI EC sensor not available */
 632 };
 633
 634 #define TPACPI_MAX_THERMAL_SENSORS 16   /* Max thermal sensors supported */
 635 struct ibm_thermal_sensors_struct {
 636         s32 temp[TPACPI_MAX_THERMAL_SENSORS];
 637 };
 638
 639 static enum thermal_access_mode thermal_read_mode;
 640
 641 static int thermal_init(struct ibm_init_struct *iibm);
 642 static int thermal_get_sensor(int idx, s32 *value);
 643 static int thermal_get_sensors(struct ibm_thermal_sensors_struct *s);
 644 static int thermal_read(char *p);
 645
 646
 647 /*
 648  * Video subdriver
 649  */
 650
 651 enum video_access_mode {
 652         TPACPI_VIDEO_NONE = 0,
 653         TPACPI_VIDEO_570,       /* 570 */
 654         TPACPI_VIDEO_770,       /* 600e/x, 770e, 770x */
 655         TPACPI_VIDEO_NEW,       /* all others */
 656 };
 657
 658 enum {  /* video status flags, based on VIDEO_570 */
 659         TP_ACPI_VIDEO_S_LCD = 0x01,     /* LCD output enabled */
 660         TP_ACPI_VIDEO_S_CRT = 0x02,     /* CRT output enabled */
 661         TP_ACPI_VIDEO_S_DVI = 0x08,     /* DVI output enabled */
 662 };
 663
 664 enum {  /* TPACPI_VIDEO_570 constants */
 665         TP_ACPI_VIDEO_570_PHSCMD = 0x87,        /* unknown magic constant :( */
 666         TP_ACPI_VIDEO_570_PHSMASK = 0x03,       /* PHS bits that map to
 667                                                  * video_status_flags */
 668         TP_ACPI_VIDEO_570_PHS2CMD = 0x8b,       /* unknown magic constant :( */
 669         TP_ACPI_VIDEO_570_PHS2SET = 0x80,       /* unknown magic constant :( */
 670 };
 671
 672 static enum video_access_mode video_supported;
 673 static int video_orig_autosw;
 674 static acpi_handle vid_handle, vid2_handle;
 675
 676 static int video_init(struct ibm_init_struct *iibm);
 677 static void video_exit(void);
 678 static int video_outputsw_get(void);
 679 static int video_outputsw_set(int status);
 680 static int video_autosw_get(void);
 681 static int video_autosw_set(int enable);
 682 static int video_outputsw_cycle(void);
 683 static int video_expand_toggle(void);
 684 static int video_read(char *p);
 685 static int video_write(char *buf);
 686
 687
 688 /*
 689  * Volume subdriver
 690  */
 691
 692 static int volume_offset = 0x30;
 693
 694 static int volume_read(char *p);
 695 static int volume_write(char *buf);
 696
 697
 698 /*
 699  * Wan subdriver
 700  */
 701
 702 enum {
 703         /* ACPI GWAN/SWAN bits */
 704         TP_ACPI_WANCARD_HWPRESENT       = 0x01, /* Wan hw available */
 705         TP_ACPI_WANCARD_RADIOSSW        = 0x02, /* Wan radio enabled */
 706         TP_ACPI_WANCARD_UNK             = 0x04, /* unknown function */
 707 };
 708
 709 static int wan_init(struct ibm_init_struct *iibm);
 710 static int wan_get_radiosw(void);
 711 static int wan_set_radiosw(int radio_on);
 712 static int wan_read(char *p);
 713 static int wan_write(char *buf);
 714
 715 /* ==================================================== END HEADER */
 716
 717 MODULE_AUTHOR("Borislav Deianov, Henrique de Moraes Holschuh");
 718 MODULE_DESCRIPTION(IBM_DESC);
 719 MODULE_VERSION(IBM_VERSION);
 720 MODULE_LICENSE("GPL");
 721
 722 /* Please remove this in year 2009 */
 723 MODULE_ALIAS("ibm_acpi");
 724
 725 /*
 726  * DMI matching for module autoloading
 727  *
 728  * See http://thinkwiki.org/wiki/List_of_DMI_IDs
 729  * See http://thinkwiki.org/wiki/BIOS_Upgrade_Downloads
 730  *
 731  * Only models listed in thinkwiki will be supported, so add yours
 732  * if it is not there yet.
 733  */
 734 #define IBM_BIOS_MODULE_ALIAS(__type) \
 735         MODULE_ALIAS("dmi:bvnIBM:bvr" __type "ET??WW")
 736
 737 /* Non-ancient thinkpads */
 738 MODULE_ALIAS("dmi:bvnIBM:*:svnIBM:*:pvrThinkPad*:rvnIBM:*");
 739 MODULE_ALIAS("dmi:bvnLENOVO:*:svnLENOVO:*:pvrThinkPad*:rvnLENOVO:*");
 740
 741 /* Ancient thinkpad BIOSes have to be identified by
 742  * BIOS type or model number, and there are far less
 743  * BIOS types than model numbers... */
 744 IBM_BIOS_MODULE_ALIAS("I[B,D,H,I,M,N,O,T,W,V,Y,Z]");
 745 IBM_BIOS_MODULE_ALIAS("1[0,3,6,8,A-G,I,K,M-P,S,T]");
 746 IBM_BIOS_MODULE_ALIAS("K[U,X-Z]");
 747
 748 #define __unused __attribute__ ((unused))
 749
 750 static enum {
 751         TPACPI_LIFE_INIT = 0,
 752         TPACPI_LIFE_RUNNING,
 753         TPACPI_LIFE_EXITING,
 754 } tpacpi_lifecycle;
 755
 756 /****************************************************************************
 757  ****************************************************************************
 758  *
 759  * ACPI Helpers and device model
 760  *
 761  ****************************************************************************
 762  ****************************************************************************/
 763
 764 /*************************************************************************
 765  * ACPI basic handles
 766  */
 767
 768 static acpi_handle root_handle;
 769
 770 #define IBM_HANDLE(object, parent, paths...)                    \
 771         static acpi_handle  object##_handle;                    \
 772         static acpi_handle *object##_parent = &parent##_handle; \
 773         static char        *object##_path;                      \
 774         static char        *object##_paths[] = { paths }
 775
 776 IBM_HANDLE(ec, root, "\\_SB.PCI0.ISA.EC0",      /* 240, 240x */
 777            "\\_SB.PCI.ISA.EC",  /* 570 */
 778            "\\_SB.PCI0.ISA0.EC0",       /* 600e/x, 770e, 770x */
 779            "\\_SB.PCI0.ISA.EC", /* A21e, A2xm/p, T20-22, X20-21 */
 780            "\\_SB.PCI0.AD4S.EC0",       /* i1400, R30 */
 781            "\\_SB.PCI0.ICH3.EC0",       /* R31 */
 782            "\\_SB.PCI0.LPC.EC", /* all others */
 783            );
 784
 785 IBM_HANDLE(ecrd, ec, "ECRD");   /* 570 */
 786 IBM_HANDLE(ecwr, ec, "ECWR");   /* 570 */
 787
 788
 789 /*************************************************************************
 790  * Misc ACPI handles
 791  */
 792
 793 IBM_HANDLE(cmos, root, "\\UCMS",        /* R50, R50e, R50p, R51, T4x, X31, X40 */
 794            "\\CMOS",            /* A3x, G4x, R32, T23, T30, X22-24, X30 */
 795            "\\CMS",             /* R40, R40e */
 796            );                   /* all others */
 797
 798 IBM_HANDLE(hkey, ec, "\\_SB.HKEY",      /* 600e/x, 770e, 770x */
 799            "^HKEY",             /* R30, R31 */
 800            "HKEY",              /* all others */
 801            );                   /* 570 */
 802
 803
 804 /*************************************************************************
 805  * ACPI helpers
 806  */
 807
 808 static int acpi_evalf(acpi_handle handle,
 809                       void *res, char *method, char *fmt, ...)
 810 {
 811         char *fmt0 = fmt;
 812         struct acpi_object_list params;
 813         union acpi_object in_objs[IBM_MAX_ACPI_ARGS];
 814         struct acpi_buffer result, *resultp;
 815         union acpi_object out_obj;
 816         acpi_status status;
 817         va_list ap;
 818         char res_type;
 819         int success;
 820         int quiet;
 821
 822         if (!*fmt) {
 823                 printk(IBM_ERR "acpi_evalf() called with empty format\n");
 824                 return 0;
 825         }
 826
 827         if (*fmt == 'q') {
 828                 quiet = 1;
 829                 fmt++;
 830         } else
 831                 quiet = 0;
 832
 833         res_type = *(fmt++);
 834
 835         params.count = 0;
 836         params.pointer = &in_objs[0];
 837
 838         va_start(ap, fmt);
 839         while (*fmt) {
 840                 char c = *(fmt++);
 841                 switch (c) {
 842                 case 'd':       /* int */
 843                         in_objs[params.count].integer.value = va_arg(ap, int);
 844                         in_objs[params.count++].type = ACPI_TYPE_INTEGER;
 845                         break;
 846                         /* add more types as needed */
 847                 default:
 848                         printk(IBM_ERR "acpi_evalf() called "
 849                                "with invalid format character '%c'\n", c);
 850                         return 0;
 851                 }
 852         }
 853         va_end(ap);
 854
 855         if (res_type != 'v') {
 856                 result.length = sizeof(out_obj);
 857                 result.pointer = &out_obj;
 858                 resultp = &result;
 859         } else
 860                 resultp = NULL;
 861
 862         status = acpi_evaluate_object(handle, method, &params, resultp);
 863
 864         switch (res_type) {
 865         case 'd':               /* int */
 866                 if (res)
 867                         *(int *)res = out_obj.integer.value;
 868                 success = status == AE_OK && out_obj.type == ACPI_TYPE_INTEGER;
 869                 break;
 870         case 'v':               /* void */
 871                 success = status == AE_OK;
 872                 break;
 873                 /* add more types as needed */
 874         default:
 875                 printk(IBM_ERR "acpi_evalf() called "
 876                        "with invalid format character '%c'\n", res_type);
 877                 return 0;
 878         }
 879
 880         if (!success && !quiet)
 881                 printk(IBM_ERR "acpi_evalf(%s, %s, ...) failed: %d\n",
 882                        method, fmt0, status);
 883
 884         return success;
 885 }
 886
 887 static void __unused acpi_print_int(acpi_handle handle, char *method)
 888 {
 889         int i;
 890
 891         if (acpi_evalf(handle, &i, method, "d"))
 892                 printk(IBM_INFO "%s = 0x%x\n", method, i);
 893         else
 894                 printk(IBM_ERR "error calling %s\n", method);
 895 }
 896
 897 static int acpi_ec_read(int i, u8 * p)
 898 {
 899         int v;
 900
 901         if (ecrd_handle) {
 902                 if (!acpi_evalf(ecrd_handle, &v, NULL, "dd", i))
 903                         return 0;
 904                 *p = v;
 905         } else {
 906                 if (ec_read(i, p) < 0)
 907                         return 0;
 908         }
 909
 910         return 1;
 911 }
 912
 913 static int acpi_ec_write(int i, u8 v)
 914 {
 915         if (ecwr_handle) {
 916                 if (!acpi_evalf(ecwr_handle, NULL, NULL, "vdd", i, v))
 917                         return 0;
 918         } else {
 919                 if (ec_write(i, v) < 0)
 920                         return 0;
 921         }
 922
 923         return 1;
 924 }
 925
 926 static int _sta(acpi_handle handle)
 927 {
 928         int status;
 929
 930         if (!handle || !acpi_evalf(handle, &status, "_STA", "d"))
 931                 status = 0;
 932
 933         return status;
 934 }
 935
 936 static int issue_thinkpad_cmos_command(int cmos_cmd)
 937 {
 938         if (!cmos_handle)
 939                 return -ENXIO;
 940
 941         if (!acpi_evalf(cmos_handle, NULL, NULL, "vd", cmos_cmd))
 942                 return -EIO;
 943
 944         return 0;
 945 }
 946
 947 /*************************************************************************
 948  * ACPI device model
 949  */
 950
 951 static void drv_acpi_handle_init(char *name,
 952                            acpi_handle *handle, acpi_handle parent,
 953                            char **paths, int num_paths, char **path)
 954 {
 955         int i;
 956         acpi_status status;
 957
 958         vdbg_printk(TPACPI_DBG_INIT, "trying to locate ACPI handle for %s\n",
 959                 name);
 960
 961         for (i = 0; i < num_paths; i++) {
 962                 status = acpi_get_handle(parent, paths[i], handle);
 963                 if (ACPI_SUCCESS(status)) {
 964                         *path = paths[i];
 965                         dbg_printk(TPACPI_DBG_INIT,
 966                                    "Found ACPI handle %s for %s\n",
 967                                    *path, name);
 968                         return;
 969                 }
 970         }
 971
 972         vdbg_printk(TPACPI_DBG_INIT, "ACPI handle for %s not found\n",
 973                     name);
 974         *handle = NULL;
 975 }
 976
 977 static void dispatch_acpi_notify(acpi_handle handle, u32 event, void *data)
 978 {
 979         struct ibm_struct *ibm = data;
 980
 981         if (tpacpi_lifecycle != TPACPI_LIFE_RUNNING)
 982                 return;
 983
 984         if (!ibm || !ibm->acpi || !ibm->acpi->notify)
 985                 return;
 986
 987         ibm->acpi->notify(ibm, event);
 988 }
 989
 990 static int __init setup_acpi_notify(struct ibm_struct *ibm)
 991 {
 992         acpi_status status;
 993         int rc;
 994
 995         BUG_ON(!ibm->acpi);
 996
 997         if (!*ibm->acpi->handle)
 998                 return 0;
 999
1000         vdbg_printk(TPACPI_DBG_INIT,
1001                 "setting up ACPI notify for %s\n", ibm->name);
1002
1003         rc = acpi_bus_get_device(*ibm->acpi->handle, &ibm->acpi->device);
1004         if (rc < 0) {
1005                 printk(IBM_ERR "acpi_bus_get_device(%s) failed: %d\n",
1006                         ibm->name, rc);
1007                 return -ENODEV;
1008         }
1009
1010         acpi_driver_data(ibm->acpi->device) = ibm;
1011         sprintf(acpi_device_class(ibm->acpi->device), "%s/%s",
1012                 IBM_ACPI_EVENT_PREFIX,
1013                 ibm->name);
1014
1015         status = acpi_install_notify_handler(*ibm->acpi->handle,
1016                         ibm->acpi->type, dispatch_acpi_notify, ibm);
1017         if (ACPI_FAILURE(status)) {
1018                 if (status == AE_ALREADY_EXISTS) {
1019                         printk(IBM_NOTICE "another device driver is already handling %s events\n",
1020                                 ibm->name);
1021                 } else {
1022                         printk(IBM_ERR "acpi_install_notify_handler(%s) failed: %d\n",
1023                                 ibm->name, status);
1024                 }
1025                 return -ENODEV;
1026         }
1027         ibm->flags.acpi_notify_installed = 1;
1028         return 0;
1029 }
1030
1031 static int __init tpacpi_device_add(struct acpi_device *device)
1032 {
1033         return 0;
1034 }
1035
1036 static int __init register_tpacpi_subdriver(struct ibm_struct *ibm)
1037 {
1038         int rc;
1039
1040         dbg_printk(TPACPI_DBG_INIT,
1041                 "registering %s as an ACPI driver\n", ibm->name);
1042
1043         BUG_ON(!ibm->acpi);
1044
1045         ibm->acpi->driver = kzalloc(sizeof(struct acpi_driver), GFP_KERNEL);
1046         if (!ibm->acpi->driver) {
1047                 printk(IBM_ERR "kzalloc(ibm->driver) failed\n");
1048                 return -ENOMEM;
1049         }
1050
1051         sprintf(ibm->acpi->driver->name, "%s_%s", IBM_NAME, ibm->name);
1052         ibm->acpi->driver->ids = ibm->acpi->hid;
1053
1054         ibm->acpi->driver->ops.add = &tpacpi_device_add;
1055
1056         rc = acpi_bus_register_driver(ibm->acpi->driver);
1057         if (rc < 0) {
1058                 printk(IBM_ERR "acpi_bus_register_driver(%s) failed: %d\n",
1059                        ibm->name, rc);
1060                 kfree(ibm->acpi->driver);
1061                 ibm->acpi->driver = NULL;
1062         } else if (!rc)
1063                 ibm->flags.acpi_driver_registered = 1;
1064
1065         return rc;
1066 }
1067
1068
1069 /****************************************************************************
1070  ****************************************************************************
1071  *
1072  * Procfs Helpers
1073  *
1074  ****************************************************************************
1075  ****************************************************************************/
1076
1077 static int dispatch_procfs_read(char *page, char **start, off_t off,
1078                         int count, int *eof, void *data)
1079 {
1080         struct ibm_struct *ibm = data;
1081         int len;
1082
1083         if (!ibm || !ibm->read)
1084                 return -EINVAL;
1085
1086         len = ibm->read(page);
1087         if (len < 0)
1088                 return len;
1089
1090         if (len <= off + count)
1091                 *eof = 1;
1092         *start = page + off;
1093         len -= off;
1094         if (len > count)
1095                 len = count;
1096         if (len < 0)
1097                 len = 0;
1098
1099         return len;
1100 }
1101
1102 static int dispatch_procfs_write(struct file *file,
1103                         const char __user * userbuf,
1104                         unsigned long count, void *data)
1105 {
1106         struct ibm_struct *ibm = data;
1107         char *kernbuf;
1108         int ret;
1109
1110         if (!ibm || !ibm->write)
1111                 return -EINVAL;
1112
1113         kernbuf = kmalloc(count + 2, GFP_KERNEL);
1114         if (!kernbuf)
1115                 return -ENOMEM;
1116
1117         if (copy_from_user(kernbuf, userbuf, count)) {
1118                 kfree(kernbuf);
1119                 return -EFAULT;
1120         }
1121
1122         kernbuf[count] = 0;
1123         strcat(kernbuf, ",");
1124         ret = ibm->write(kernbuf);
1125         if (ret == 0)
1126                 ret = count;
1127
1128         kfree(kernbuf);
1129
1130         return ret;
1131 }
1132
1133 static char *next_cmd(char **cmds)
1134 {
1135         char *start = *cmds;
1136         char *end;
1137
1138         while ((end = strchr(start, ',')) && end == start)
1139                 start = end + 1;
1140
1141         if (!end)
1142                 return NULL;
1143
1144         *end = 0;
1145         *cmds = end + 1;
1146         return start;
1147 }
1148
1149
1150 /****************************************************************************
1151  ****************************************************************************
1152  *
1153  * Device model: input, hwmon and platform
1154  *
1155  ****************************************************************************
1156  ****************************************************************************/
1157
1158 static struct platform_device *tpacpi_pdev;
1159 static struct platform_device *tpacpi_sensors_pdev;
1160 static struct device *tpacpi_hwmon;
1161 static struct input_dev *tpacpi_inputdev;
1162 static struct mutex tpacpi_inputdev_send_mutex;
1163
1164
1165 static int tpacpi_resume_handler(struct platform_device *pdev)
1166 {
1167         struct ibm_struct *ibm, *itmp;
1168
1169         list_for_each_entry_safe(ibm, itmp,
1170                                  &tpacpi_all_drivers,
1171                                  all_drivers) {
1172                 if (ibm->resume)
1173                         (ibm->resume)();
1174         }
1175
1176         return 0;
1177 }
1178
1179 static struct platform_driver tpacpi_pdriver = {
1180         .driver = {
1181                 .name = IBM_DRVR_NAME,
1182                 .owner = THIS_MODULE,
1183         },
1184         .resume = tpacpi_resume_handler,
1185 };
1186
1187 static struct platform_driver tpacpi_hwmon_pdriver = {
1188         .driver = {
1189                 .name = IBM_HWMON_DRVR_NAME,
1190                 .owner = THIS_MODULE,
1191         },
1192 };
1193
1194 /*************************************************************************
1195  * thinkpad-acpi driver attributes
1196  */
1197
1198 /* interface_version --------------------------------------------------- */
1199 static ssize_t tpacpi_driver_interface_version_show(
1200                                 struct device_driver *drv,
1201                                 char *buf)
1202 {
1203         return snprintf(buf, PAGE_SIZE, "0x%08x\n", TPACPI_SYSFS_VERSION);
1204 }
1205
1206 static DRIVER_ATTR(interface_version, S_IRUGO,
1207                 tpacpi_driver_interface_version_show, NULL);
1208
1209 /* debug_level --------------------------------------------------------- */
1210 static ssize_t tpacpi_driver_debug_show(struct device_driver *drv,
1211                                                 char *buf)
1212 {
1213         return snprintf(buf, PAGE_SIZE, "0x%04x\n", dbg_level);
1214 }
1215
1216 static ssize_t tpacpi_driver_debug_store(struct device_driver *drv,
1217                                                 const char *buf, size_t count)
1218 {
1219         unsigned long t;
1220
1221         if (parse_strtoul(buf, 0xffff, &t))
1222                 return -EINVAL;
1223
1224         dbg_level = t;
1225
1226         return count;
1227 }
1228
1229 static DRIVER_ATTR(debug_level, S_IWUSR | S_IRUGO,
1230                 tpacpi_driver_debug_show, tpacpi_driver_debug_store);
1231
1232 /* version ------------------------------------------------------------- */
1233 static ssize_t tpacpi_driver_version_show(struct device_driver *drv,
1234                                                 char *buf)
1235 {
1236         return snprintf(buf, PAGE_SIZE, "%s v%s\n", IBM_DESC, IBM_VERSION);
1237 }
1238
1239 static DRIVER_ATTR(version, S_IRUGO,
1240                 tpacpi_driver_version_show, NULL);
1241
1242 /* --------------------------------------------------------------------- */
1243
1244 static struct driver_attribute* tpacpi_driver_attributes[] = {
1245         &driver_attr_debug_level, &driver_attr_version,
1246         &driver_attr_interface_version,
1247 };
1248
1249 static int __init tpacpi_create_driver_attributes(struct device_driver *drv)
1250 {
1251         int i, res;
1252
1253         i = 0;
1254         res = 0;
1255         while (!res && i < ARRAY_SIZE(tpacpi_driver_attributes)) {
1256                 res = driver_create_file(drv, tpacpi_driver_attributes[i]);
1257                 i++;
1258         }
1259
1260         return res;
1261 }
1262
1263 static void tpacpi_remove_driver_attributes(struct device_driver *drv)
1264 {
1265         int i;
1266
1267         for(i = 0; i < ARRAY_SIZE(tpacpi_driver_attributes); i++)
1268                 driver_remove_file(drv, tpacpi_driver_attributes[i]);
1269 }
1270
1271 /*************************************************************************
1272  * sysfs support helpers
1273  */
1274
1275 struct attribute_set_obj {
1276         struct attribute_set s;
1277         struct attribute *a;
1278 } __attribute__((packed));
1279
1280 static struct attribute_set *create_attr_set(unsigned int max_members,
1281                                                 const char* name)
1282 {
1283         struct attribute_set_obj *sobj;
1284
1285         if (max_members == 0)
1286                 return NULL;
1287
1288         /* Allocates space for implicit NULL at the end too */
1289         sobj = kzalloc(sizeof(struct attribute_set_obj) +
1290                     max_members * sizeof(struct attribute *),
1291                     GFP_KERNEL);
1292         if (!sobj)
1293                 return NULL;
1294         sobj->s.max_members = max_members;
1295         sobj->s.group.attrs = &sobj->a;
1296         sobj->s.group.name = name;
1297
1298         return &sobj->s;
1299 }
1300
1301 /* not multi-threaded safe, use it in a single thread per set */
1302 static int add_to_attr_set(struct attribute_set* s, struct attribute *attr)
1303 {
1304         if (!s || !attr)
1305                 return -EINVAL;
1306
1307         if (s->members >= s->max_members)
1308                 return -ENOMEM;
1309
1310         s->group.attrs[s->members] = attr;
1311         s->members++;
1312
1313         return 0;
1314 }
1315
1316 static int add_many_to_attr_set(struct attribute_set* s,
1317                         struct attribute **attr,
1318                         unsigned int count)
1319 {
1320         int i, res;
1321
1322         for (i = 0; i < count; i++) {
1323                 res = add_to_attr_set(s, attr[i]);
1324                 if (res)
1325                         return res;
1326         }
1327
1328         return 0;
1329 }
1330
1331 static void delete_attr_set(struct attribute_set* s, struct kobject *kobj)
1332 {
1333         sysfs_remove_group(kobj, &s->group);
1334         destroy_attr_set(s);
1335 }
1336
1337 static int parse_strtoul(const char *buf,
1338                 unsigned long max, unsigned long *value)
1339 {
1340         char *endp;
1341
1342         while (*buf && isspace(*buf))
1343                 buf++;
1344         *value = simple_strtoul(buf, &endp, 0);
1345         while (*endp && isspace(*endp))
1346                 endp++;
1347         if (*endp || *value > max)
1348                 return -EINVAL;
1349
1350         return 0;
1351 }
1352
1353 /****************************************************************************
1354  ****************************************************************************
1355  *
1356  * Subdrivers
1357  *
1358  ****************************************************************************
1359  ****************************************************************************/
1360
1361 /*************************************************************************
1362  * thinkpad-acpi init subdriver
1363  */
1364
1365 static int __init thinkpad_acpi_driver_init(struct ibm_init_struct *iibm)
1366 {
1367         printk(IBM_INFO "%s v%s\n", IBM_DESC, IBM_VERSION);
1368         printk(IBM_INFO "%s\n", IBM_URL);
1369
1370         printk(IBM_INFO "ThinkPad BIOS %s, EC %s\n",
1371                 (thinkpad_id.bios_version_str) ?
1372                         thinkpad_id.bios_version_str : "unknown",
1373                 (thinkpad_id.ec_version_str) ?
1374                         thinkpad_id.ec_version_str : "unknown");
1375
1376         if (thinkpad_id.vendor && thinkpad_id.model_str)
1377                 printk(IBM_INFO "%s %s\n",
1378                         (thinkpad_id.vendor == PCI_VENDOR_ID_IBM) ?
1379                                 "IBM" : ((thinkpad_id.vendor ==
1380                                                 PCI_VENDOR_ID_LENOVO) ?
1381                                         "Lenovo" : "Unknown vendor"),
1382                         thinkpad_id.model_str);
1383
1384         return 0;
1385 }
1386
1387 static int thinkpad_acpi_driver_read(char *p)
1388 {
1389         int len = 0;
1390
1391         len += sprintf(p + len, "driver:\t\t%s\n", IBM_DESC);
1392         len += sprintf(p + len, "version:\t%s\n", IBM_VERSION);
1393
1394         return len;
1395 }
1396
1397 static struct ibm_struct thinkpad_acpi_driver_data = {
1398         .name = "driver",
1399         .read = thinkpad_acpi_driver_read,
1400 };
1401
1402 /*************************************************************************
1403  * Hotkey subdriver
1404  */
1405
1406 enum {  /* Keys available through NVRAM polling */
1407         TPACPI_HKEY_NVRAM_KNOWN_MASK = 0x00fb88c0U,
1408         TPACPI_HKEY_NVRAM_GOOD_MASK  = 0x00fb8000U,
1409 };
1410
1411 enum {  /* Positions of some of the keys in hotkey masks */
1412         TP_ACPI_HKEY_DISPSWTCH_MASK     = 1 << TP_ACPI_HOTKEYSCAN_FNF7,
1413         TP_ACPI_HKEY_DISPXPAND_MASK     = 1 << TP_ACPI_HOTKEYSCAN_FNF8,
1414         TP_ACPI_HKEY_HIBERNATE_MASK     = 1 << TP_ACPI_HOTKEYSCAN_FNF12,
1415         TP_ACPI_HKEY_BRGHTUP_MASK       = 1 << TP_ACPI_HOTKEYSCAN_FNHOME,
1416         TP_ACPI_HKEY_BRGHTDWN_MASK      = 1 << TP_ACPI_HOTKEYSCAN_FNEND,
1417         TP_ACPI_HKEY_THNKLGHT_MASK      = 1 << TP_ACPI_HOTKEYSCAN_FNPAGEUP,
1418         TP_ACPI_HKEY_ZOOM_MASK          = 1 << TP_ACPI_HOTKEYSCAN_FNSPACE,
1419         TP_ACPI_HKEY_VOLUP_MASK         = 1 << TP_ACPI_HOTKEYSCAN_VOLUMEUP,
1420         TP_ACPI_HKEY_VOLDWN_MASK        = 1 << TP_ACPI_HOTKEYSCAN_VOLUMEDOWN,
1421         TP_ACPI_HKEY_MUTE_MASK          = 1 << TP_ACPI_HOTKEYSCAN_MUTE,
1422         TP_ACPI_HKEY_THINKPAD_MASK      = 1 << TP_ACPI_HOTKEYSCAN_THINKPAD,
1423 };
1424
1425 enum {  /* NVRAM to ACPI HKEY group map */
1426         TP_NVRAM_HKEY_GROUP_HK2         = TP_ACPI_HKEY_THINKPAD_MASK |
1427                                           TP_ACPI_HKEY_ZOOM_MASK |
1428                                           TP_ACPI_HKEY_DISPSWTCH_MASK |
1429                                           TP_ACPI_HKEY_HIBERNATE_MASK,
1430         TP_NVRAM_HKEY_GROUP_BRIGHTNESS  = TP_ACPI_HKEY_BRGHTUP_MASK |
1431                                           TP_ACPI_HKEY_BRGHTDWN_MASK,
1432         TP_NVRAM_HKEY_GROUP_VOLUME      = TP_ACPI_HKEY_VOLUP_MASK |
1433                                           TP_ACPI_HKEY_VOLDWN_MASK |
1434                                           TP_ACPI_HKEY_MUTE_MASK,
1435 };
1436
1437 #ifdef CONFIG_THINKPAD_ACPI_HOTKEY_POLL
1438 struct tp_nvram_state {
1439        u16 thinkpad_toggle:1;
1440        u16 zoom_toggle:1;
1441        u16 display_toggle:1;
1442        u16 thinklight_toggle:1;
1443        u16 hibernate_toggle:1;
1444        u16 displayexp_toggle:1;
1445        u16 display_state:1;
1446        u16 brightness_toggle:1;
1447        u16 volume_toggle:1;
1448        u16 mute:1;
1449
1450        u8 brightness_level;
1451        u8 volume_level;
1452 };
1453
1454 static struct task_struct *tpacpi_hotkey_task;
1455 static u32 hotkey_source_mask;          /* bit mask 0=ACPI,1=NVRAM */
1456 static int hotkey_poll_freq = 10;       /* Hz */
1457 static struct mutex hotkey_thread_mutex;
1458 static struct mutex hotkey_thread_data_mutex;
1459 static unsigned int hotkey_config_change;
1460
1461 #else /* CONFIG_THINKPAD_ACPI_HOTKEY_POLL */
1462
1463 #define hotkey_source_mask 0U
1464
1465 #endif /* CONFIG_THINKPAD_ACPI_HOTKEY_POLL */
1466
1467 static int hotkey_orig_status;
1468 static u32 hotkey_orig_mask;
1469 static u32 hotkey_all_mask;
1470 static u32 hotkey_reserved_mask;
1471 static u32 hotkey_mask;
1472
1473 static u16 *hotkey_keycode_map;
1474
1475 static struct attribute_set *hotkey_dev_attributes;
1476
1477 #ifdef CONFIG_THINKPAD_ACPI_HOTKEY_POLL
1478 #define HOTKEY_CONFIG_CRITICAL_START \
1479         mutex_lock(&hotkey_thread_data_mutex); \
1480         hotkey_config_change++;
1481 #define HOTKEY_CONFIG_CRITICAL_END \
1482         mutex_unlock(&hotkey_thread_data_mutex);
1483 #else
1484 #define HOTKEY_CONFIG_CRITICAL_START
1485 #define HOTKEY_CONFIG_CRITICAL_END
1486 #endif /* CONFIG_THINKPAD_ACPI_HOTKEY_POLL */
1487
1488 static int hotkey_get_wlsw(int *status)
1489 {
1490         if (!acpi_evalf(hkey_handle, status, "WLSW", "d"))
1491                 return -EIO;
1492         return 0;
1493 }
1494
1495 /*
1496  * Call with hotkey_mutex held
1497  */
1498 static int hotkey_mask_get(void)
1499 {
1500         u32 m = 0;
1501
1502         if (tp_features.hotkey_mask) {
1503                 if (!acpi_evalf(hkey_handle, &m, "DHKN", "d"))
1504                         return -EIO;
1505         }
1506         hotkey_mask = m | (hotkey_source_mask & hotkey_mask);
1507
1508         return 0;
1509 }
1510
1511 /*
1512  * Call with hotkey_mutex held
1513  */
1514 static int hotkey_mask_set(u32 mask)
1515 {
1516         int i;
1517         int rc = 0;
1518
1519         if (tp_features.hotkey_mask) {
1520                 HOTKEY_CONFIG_CRITICAL_START
1521                 for (i = 0; i < 32; i++) {
1522                         u32 m = 1 << i;
1523                         /* enable in firmware mask only keys not in NVRAM
1524                          * mode, but enable the key in the cached hotkey_mask
1525                          * regardless of mode, or the key will end up
1526                          * disabled by hotkey_mask_get() */
1527                         if (!acpi_evalf(hkey_handle,
1528                                         NULL, "MHKM", "vdd", i + 1,
1529                                         !!((mask & ~hotkey_source_mask) & m))) {
1530                                 rc = -EIO;
1531                                 break;
1532                         } else {
1533                                 hotkey_mask = (hotkey_mask & ~m) | (mask & m);
1534                         }
1535                 }
1536                 HOTKEY_CONFIG_CRITICAL_END
1537
1538                 /* hotkey_mask_get must be called unconditionally below */
1539                 if (!hotkey_mask_get() && !rc &&
1540                     (hotkey_mask & ~hotkey_source_mask) !=
1541                      (mask & ~hotkey_source_mask)) {
1542                         printk(IBM_NOTICE
1543                                "requested hot key mask 0x%08x, but "
1544                                "firmware forced it to 0x%08x\n",
1545                                mask, hotkey_mask);
1546                 }
1547         } else {
1548 #ifdef CONFIG_THINKPAD_ACPI_HOTKEY_POLL
1549                 HOTKEY_CONFIG_CRITICAL_START
1550                 hotkey_mask = mask & hotkey_source_mask;
1551                 HOTKEY_CONFIG_CRITICAL_END
1552                 hotkey_mask_get();
1553                 if (hotkey_mask != mask) {
1554                         printk(IBM_NOTICE
1555                                "requested hot key mask 0x%08x, "
1556                                "forced to 0x%08x (NVRAM poll mask is "
1557                                "0x%08x): no firmware mask support\n",
1558                                mask, hotkey_mask, hotkey_source_mask);
1559                 }
1560 #else
1561                 hotkey_mask_get();
1562                 rc = -ENXIO;
1563 #endif /* CONFIG_THINKPAD_ACPI_HOTKEY_POLL */
1564         }
1565
1566         return rc;
1567 }
1568
1569 static int hotkey_status_get(int *status)
1570 {
1571         if (!acpi_evalf(hkey_handle, status, "DHKC", "d"))
1572                 return -EIO;
1573
1574         return 0;
1575 }
1576
1577 static int hotkey_status_set(int status)
1578 {
1579         if (!acpi_evalf(hkey_handle, NULL, "MHKC", "vd", status))
1580                 return -EIO;
1581
1582         return 0;
1583 }
1584
1585 static void tpacpi_input_send_radiosw(void)
1586 {
1587         int wlsw;
1588
1589         mutex_lock(&tpacpi_inputdev_send_mutex);
1590
1591         if (tp_features.hotkey_wlsw && !hotkey_get_wlsw(&wlsw)) {
1592                 input_report_switch(tpacpi_inputdev,
1593                                     SW_RADIO, !!wlsw);
1594                 input_sync(tpacpi_inputdev);
1595         }
1596
1597         mutex_unlock(&tpacpi_inputdev_send_mutex);
1598 }
1599
1600 static void tpacpi_input_send_key(unsigned int scancode)
1601 {
1602         unsigned int keycode;
1603
1604         keycode = hotkey_keycode_map[scancode];
1605
1606         if (keycode != KEY_RESERVED) {
1607                 mutex_lock(&tpacpi_inputdev_send_mutex);
1608
1609                 input_report_key(tpacpi_inputdev, keycode, 1);
1610                 if (keycode == KEY_UNKNOWN)
1611                         input_event(tpacpi_inputdev, EV_MSC, MSC_SCAN,
1612                                     scancode);
1613                 input_sync(tpacpi_inputdev);
1614
1615                 input_report_key(tpacpi_inputdev, keycode, 0);
1616                 if (keycode == KEY_UNKNOWN)
1617                         input_event(tpacpi_inputdev, EV_MSC, MSC_SCAN,
1618                                     scancode);
1619                 input_sync(tpacpi_inputdev);
1620
1621                 mutex_unlock(&tpacpi_inputdev_send_mutex);
1622         }
1623 }
1624
1625 #ifdef CONFIG_THINKPAD_ACPI_HOTKEY_POLL
1626 static struct tp_acpi_drv_struct ibm_hotkey_acpidriver;
1627
1628 static void tpacpi_hotkey_send_key(unsigned int scancode)
1629 {
1630         tpacpi_input_send_key(scancode);
1631         if (hotkey_report_mode < 2) {
1632                 acpi_bus_generate_proc_event(ibm_hotkey_acpidriver.device,
1633                                                 0x80, 0x1001 + scancode);
1634         }
1635 }
1636
1637 static void hotkey_read_nvram(struct tp_nvram_state *n, u32 m)
1638 {
1639         u8 d;
1640
1641         if (m & TP_NVRAM_HKEY_GROUP_HK2) {
1642                 d = nvram_read_byte(TP_NVRAM_ADDR_HK2);
1643                 n->thinkpad_toggle = !!(d & TP_NVRAM_MASK_HKT_THINKPAD);
1644                 n->zoom_toggle = !!(d & TP_NVRAM_MASK_HKT_ZOOM);
1645                 n->display_toggle = !!(d & TP_NVRAM_MASK_HKT_DISPLAY);
1646                 n->hibernate_toggle = !!(d & TP_NVRAM_MASK_HKT_HIBERNATE);
1647         }
1648         if (m & TP_ACPI_HKEY_THNKLGHT_MASK) {
1649                 d = nvram_read_byte(TP_NVRAM_ADDR_THINKLIGHT);
1650                 n->thinklight_toggle = !!(d & TP_NVRAM_MASK_THINKLIGHT);
1651         }
1652         if (m & TP_ACPI_HKEY_DISPXPAND_MASK) {
1653                 d = nvram_read_byte(TP_NVRAM_ADDR_VIDEO);
1654                 n->displayexp_toggle =
1655                                 !!(d & TP_NVRAM_MASK_HKT_DISPEXPND);
1656         }
1657         if (m & TP_NVRAM_HKEY_GROUP_BRIGHTNESS) {
1658                 d = nvram_read_byte(TP_NVRAM_ADDR_BRIGHTNESS);
1659                 n->brightness_level = (d & TP_NVRAM_MASK_LEVEL_BRIGHTNESS)
1660                                 >> TP_NVRAM_POS_LEVEL_BRIGHTNESS;
1661                 n->brightness_toggle =
1662                                 !!(d & TP_NVRAM_MASK_HKT_BRIGHTNESS);
1663         }
1664         if (m & TP_NVRAM_HKEY_GROUP_VOLUME) {
1665                 d = nvram_read_byte(TP_NVRAM_ADDR_MIXER);
1666                 n->volume_level = (d & TP_NVRAM_MASK_LEVEL_VOLUME)
1667                                 >> TP_NVRAM_POS_LEVEL_VOLUME;
1668                 n->mute = !!(d & TP_NVRAM_MASK_MUTE);
1669                 n->volume_toggle = !!(d & TP_NVRAM_MASK_HKT_VOLUME);
1670         }
1671 }
1672
1673 #define TPACPI_COMPARE_KEY(__scancode, __member) \
1674         do { if ((mask & (1 << __scancode)) && oldn->__member != newn->__member) \
1675                 tpacpi_hotkey_send_key(__scancode); } while (0)
1676
1677 #define TPACPI_MAY_SEND_KEY(__scancode) \
1678         do { if (mask & (1 << __scancode)) \
1679                 tpacpi_hotkey_send_key(__scancode); } while (0)
1680
1681 static void hotkey_compare_and_issue_event(struct tp_nvram_state *oldn,
1682                                            struct tp_nvram_state *newn,
1683                                            u32 mask)
1684 {
1685         TPACPI_COMPARE_KEY(TP_ACPI_HOTKEYSCAN_THINKPAD, thinkpad_toggle);
1686         TPACPI_COMPARE_KEY(TP_ACPI_HOTKEYSCAN_FNSPACE, zoom_toggle);
1687         TPACPI_COMPARE_KEY(TP_ACPI_HOTKEYSCAN_FNF7, display_toggle);
1688         TPACPI_COMPARE_KEY(TP_ACPI_HOTKEYSCAN_FNF12, hibernate_toggle);
1689
1690         TPACPI_COMPARE_KEY(TP_ACPI_HOTKEYSCAN_FNPAGEUP, thinklight_toggle);
1691
1692         TPACPI_COMPARE_KEY(TP_ACPI_HOTKEYSCAN_FNF8, displayexp_toggle);
1693
1694         /* handle volume */
1695         if (oldn->volume_toggle != newn->volume_toggle) {
1696                 if (oldn->mute != newn->mute) {
1697                         TPACPI_MAY_SEND_KEY(TP_ACPI_HOTKEYSCAN_MUTE);
1698                 }
1699                 if (oldn->volume_level > newn->volume_level) {
1700                         TPACPI_MAY_SEND_KEY(TP_ACPI_HOTKEYSCAN_VOLUMEDOWN);
1701                 } else if (oldn->volume_level < newn->volume_level) {
1702                         TPACPI_MAY_SEND_KEY(TP_ACPI_HOTKEYSCAN_VOLUMEUP);
1703                 } else if (oldn->mute == newn->mute) {
1704                         /* repeated key presses that didn't change state */
1705                         if (newn->mute) {
1706                                 TPACPI_MAY_SEND_KEY(TP_ACPI_HOTKEYSCAN_MUTE);
1707                         } else if (newn->volume_level != 0) {
1708                                 TPACPI_MAY_SEND_KEY(TP_ACPI_HOTKEYSCAN_VOLUMEUP);
1709                         } else {
1710                                 TPACPI_MAY_SEND_KEY(TP_ACPI_HOTKEYSCAN_VOLUMEDOWN);
1711                         }
1712                 }
1713         }
1714
1715         /* handle brightness */
1716         if (oldn->brightness_toggle != newn->brightness_toggle) {
1717                 if (oldn->brightness_level < newn->brightness_level) {
1718                         TPACPI_MAY_SEND_KEY(TP_ACPI_HOTKEYSCAN_FNHOME);
1719                 } else if (oldn->brightness_level > newn->brightness_level) {
1720                         TPACPI_MAY_SEND_KEY(TP_ACPI_HOTKEYSCAN_FNEND);
1721                 } else {
1722                         /* repeated key presses that didn't change state */
1723                         if (newn->brightness_level != 0) {
1724                                 TPACPI_MAY_SEND_KEY(TP_ACPI_HOTKEYSCAN_FNHOME);
1725                         } else {
1726                                 TPACPI_MAY_SEND_KEY(TP_ACPI_HOTKEYSCAN_FNEND);
1727                         }
1728                 }
1729         }
1730 }
1731
1732 #undef TPACPI_COMPARE_KEY
1733 #undef TPACPI_MAY_SEND_KEY
1734
1735 static int hotkey_kthread(void *data)
1736 {
1737         struct tp_nvram_state s[2];
1738         u32 mask;
1739         unsigned int si, so;
1740         unsigned long t;
1741         unsigned int change_detector, must_reset;
1742
1743         mutex_lock(&hotkey_thread_mutex);
1744
1745         if (tpacpi_lifecycle == TPACPI_LIFE_EXITING)
1746                 goto exit;
1747
1748         set_freezable();
1749
1750         so = 0;
1751         si = 1;
1752         t = 0;
1753
1754         /* Initial state for compares */
1755         mutex_lock(&hotkey_thread_data_mutex);
1756         change_detector = hotkey_config_change;
1757         mask = hotkey_source_mask & hotkey_mask;
1758         mutex_unlock(&hotkey_thread_data_mutex);
1759         hotkey_read_nvram(&s[so], mask);
1760
1761         while (!kthread_should_stop() && hotkey_poll_freq) {
1762                 if (t == 0)
1763                         t = 1000/hotkey_poll_freq;
1764                 t = msleep_interruptible(t);
1765                 if (unlikely(kthread_should_stop()))
1766                         break;
1767                 must_reset = try_to_freeze();
1768                 if (t > 0 && !must_reset)
1769                         continue;
1770
1771                 mutex_lock(&hotkey_thread_data_mutex);
1772                 if (must_reset || hotkey_config_change != change_detector) {
1773                         /* forget old state on thaw or config change */
1774                         si = so;
1775                         t = 0;
1776                         change_detector = hotkey_config_change;
1777                 }
1778                 mask = hotkey_source_mask & hotkey_mask;
1779                 mutex_unlock(&hotkey_thread_data_mutex);
1780
1781                 if (likely(mask)) {
1782                         hotkey_read_nvram(&s[si], mask);
1783                         if (likely(si != so)) {
1784                                 hotkey_compare_and_issue_event(&s[so], &s[si],
1785                                                                mask);
1786                         }
1787                 }
1788
1789                 so = si;
1790                 si ^= 1;
1791         }
1792
1793 exit:
1794         mutex_unlock(&hotkey_thread_mutex);
1795         return 0;
1796 }
1797
1798 static void hotkey_poll_stop_sync(void)
1799 {
1800         if (tpacpi_hotkey_task) {
1801                 if (frozen(tpacpi_hotkey_task) ||
1802                     freezing(tpacpi_hotkey_task))
1803                         thaw_process(tpacpi_hotkey_task);
1804
1805                 kthread_stop(tpacpi_hotkey_task);
1806                 tpacpi_hotkey_task = NULL;
1807                 mutex_lock(&hotkey_thread_mutex);
1808                 /* at this point, the thread did exit */
1809                 mutex_unlock(&hotkey_thread_mutex);
1810         }
1811 }
1812
1813 /* call with hotkey_mutex held */
1814 static void hotkey_poll_setup(int may_warn)
1815 {
1816         if ((hotkey_source_mask & hotkey_mask) != 0 &&
1817             hotkey_poll_freq > 0 &&
1818             (tpacpi_inputdev->users > 0 || hotkey_report_mode < 2)) {
1819                 if (!tpacpi_hotkey_task) {
1820                         tpacpi_hotkey_task = kthread_run(hotkey_kthread,
1821                                                NULL, IBM_FILE "d");
1822                         if (IS_ERR(tpacpi_hotkey_task)) {
1823                                 tpacpi_hotkey_task = NULL;
1824                                 printk(IBM_ERR "could not create kernel thread "
1825                                        "for hotkey polling\n");
1826                         }
1827                 }
1828         } else {
1829                 hotkey_poll_stop_sync();
1830                 if (may_warn &&
1831                     hotkey_source_mask != 0 && hotkey_poll_freq == 0) {
1832                         printk(IBM_NOTICE "hot keys 0x%08x require polling, "
1833                                 "which is currently disabled\n",
1834                                 hotkey_source_mask);
1835                 }
1836         }
1837 }
1838
1839 static void hotkey_poll_setup_safe(int may_warn)
1840 {
1841         mutex_lock(&hotkey_mutex);
1842         hotkey_poll_setup(may_warn);
1843         mutex_unlock(&hotkey_mutex);
1844 }
1845
1846 static int hotkey_inputdev_open(struct input_dev *dev)
1847 {
1848         switch (tpacpi_lifecycle) {
1849         case TPACPI_LIFE_INIT:
1850                 /*
1851                  * hotkey_init will call hotkey_poll_setup_safe
1852                  * at the appropriate moment
1853                  */
1854                 return 0;
1855         case TPACPI_LIFE_EXITING:
1856                 return -EBUSY;
1857         case TPACPI_LIFE_RUNNING:
1858                 hotkey_poll_setup_safe(0);
1859                 return 0;
1860         }
1861
1862         /* Should only happen if tpacpi_lifecycle is corrupt */
1863         BUG();
1864         return -EBUSY;
1865 }
1866
1867 static void hotkey_inputdev_close(struct input_dev *dev)
1868 {
1869         /* disable hotkey polling when possible */
1870         if (tpacpi_lifecycle == TPACPI_LIFE_RUNNING)
1871                 hotkey_poll_setup_safe(0);
1872 }
1873 #endif /* CONFIG_THINKPAD_ACPI_HOTKEY_POLL */
1874
1875 /* sysfs hotkey enable ------------------------------------------------- */
1876 static ssize_t hotkey_enable_show(struct device *dev,
1877                            struct device_attribute *attr,
1878                            char *buf)
1879 {
1880         int res, status;
1881
1882         res = hotkey_status_get(&status);
1883         if (res)
1884                 return res;
1885
1886         return snprintf(buf, PAGE_SIZE, "%d\n", status);
1887 }
1888
1889 static ssize_t hotkey_enable_store(struct device *dev,
1890                             struct device_attribute *attr,
1891                             const char *buf, size_t count)
1892 {
1893         unsigned long t;
1894         int res;
1895
1896         if (parse_strtoul(buf, 1, &t))
1897                 return -EINVAL;
1898
1899         res = hotkey_status_set(t);
1900
1901         return (res) ? res : count;
1902 }
1903
1904 static struct device_attribute dev_attr_hotkey_enable =
1905         __ATTR(hotkey_enable, S_IWUSR | S_IRUGO,
1906                 hotkey_enable_show, hotkey_enable_store);
1907
1908 /* sysfs hotkey mask --------------------------------------------------- */
1909 static ssize_t hotkey_mask_show(struct device *dev,
1910                            struct device_attribute *attr,
1911                            char *buf)
1912 {
1913         int res;
1914
1915         if (mutex_lock_interruptible(&hotkey_mutex))
1916                 return -ERESTARTSYS;
1917         res = hotkey_mask_get();
1918         mutex_unlock(&hotkey_mutex);
1919
1920         return (res)?
1921                 res : snprintf(buf, PAGE_SIZE, "0x%08x\n", hotkey_mask);
1922 }
1923
1924 static ssize_t hotkey_mask_store(struct device *dev,
1925                             struct device_attribute *attr,
1926                             const char *buf, size_t count)
1927 {
1928         unsigned long t;
1929         int res;
1930
1931         if (parse_strtoul(buf, 0xffffffffUL, &t))
1932                 return -EINVAL;
1933
1934         if (mutex_lock_interruptible(&hotkey_mutex))
1935                 return -ERESTARTSYS;
1936
1937         res = hotkey_mask_set(t);
1938
1939 #ifdef CONFIG_THINKPAD_ACPI_HOTKEY_POLL
1940         hotkey_poll_setup(1);
1941 #endif
1942
1943         mutex_unlock(&hotkey_mutex);
1944
1945         return (res) ? res : count;
1946 }
1947
1948 static struct device_attribute dev_attr_hotkey_mask =
1949         __ATTR(hotkey_mask, S_IWUSR | S_IRUGO,
1950                 hotkey_mask_show, hotkey_mask_store);
1951
1952 /* sysfs hotkey bios_enabled ------------------------------------------- */
1953 static ssize_t hotkey_bios_enabled_show(struct device *dev,
1954                            struct device_attribute *attr,
1955                            char *buf)
1956 {
1957         return snprintf(buf, PAGE_SIZE, "%d\n", hotkey_orig_status);
1958 }
1959
1960 static struct device_attribute dev_attr_hotkey_bios_enabled =
1961         __ATTR(hotkey_bios_enabled, S_IRUGO, hotkey_bios_enabled_show, NULL);
1962
1963 /* sysfs hotkey bios_mask ---------------------------------------------- */
1964 static ssize_t hotkey_bios_mask_show(struct device *dev,
1965                            struct device_attribute *attr,
1966                            char *buf)
1967 {
1968         return snprintf(buf, PAGE_SIZE, "0x%08x\n", hotkey_orig_mask);
1969 }
1970
1971 static struct device_attribute dev_attr_hotkey_bios_mask =
1972         __ATTR(hotkey_bios_mask, S_IRUGO, hotkey_bios_mask_show, NULL);
1973
1974 /* sysfs hotkey all_mask ----------------------------------------------- */
1975 static ssize_t hotkey_all_mask_show(struct device *dev,
1976                            struct device_attribute *attr,
1977                            char *buf)
1978 {
1979         return snprintf(buf, PAGE_SIZE, "0x%08x\n",
1980                                 hotkey_all_mask | hotkey_source_mask);
1981 }
1982
1983 static struct device_attribute dev_attr_hotkey_all_mask =
1984         __ATTR(hotkey_all_mask, S_IRUGO, hotkey_all_mask_show, NULL);
1985
1986 /* sysfs hotkey recommended_mask --------------------------------------- */
1987 static ssize_t hotkey_recommended_mask_show(struct device *dev,
1988                                             struct device_attribute *attr,
1989                                             char *buf)
1990 {
1991         return snprintf(buf, PAGE_SIZE, "0x%08x\n",
1992                         (hotkey_all_mask | hotkey_source_mask)
1993                         & ~hotkey_reserved_mask);
1994 }
1995
1996 static struct device_attribute dev_attr_hotkey_recommended_mask =
1997         __ATTR(hotkey_recommended_mask, S_IRUGO,
1998                 hotkey_recommended_mask_show, NULL);
1999
2000 #ifdef CONFIG_THINKPAD_ACPI_HOTKEY_POLL
2001
2002 /* sysfs hotkey hotkey_source_mask ------------------------------------- */
2003 static ssize_t hotkey_source_mask_show(struct device *dev,
2004                            struct device_attribute *attr,
2005                            char *buf)
2006 {
2007         return snprintf(buf, PAGE_SIZE, "0x%08x\n", hotkey_source_mask);
2008 }
2009
2010 static ssize_t hotkey_source_mask_store(struct device *dev,
2011                             struct device_attribute *attr,
2012                             const char *buf, size_t count)
2013 {
2014         unsigned long t;
2015
2016         if (parse_strtoul(buf, 0xffffffffUL, &t) ||
2017                 ((t & ~TPACPI_HKEY_NVRAM_KNOWN_MASK) != 0))
2018                 return -EINVAL;
2019
2020         if (mutex_lock_interruptible(&hotkey_mutex))
2021                 return -ERESTARTSYS;
2022
2023         HOTKEY_CONFIG_CRITICAL_START
2024         hotkey_source_mask = t;
2025         HOTKEY_CONFIG_CRITICAL_END
2026
2027         hotkey_poll_setup(1);
2028
2029         mutex_unlock(&hotkey_mutex);
2030
2031         return count;
2032 }
2033
2034 static struct device_attribute dev_attr_hotkey_source_mask =
2035         __ATTR(hotkey_source_mask, S_IWUSR | S_IRUGO,
2036                 hotkey_source_mask_show, hotkey_source_mask_store);
2037
2038 /* sysfs hotkey hotkey_poll_freq --------------------------------------- */
2039 static ssize_t hotkey_poll_freq_show(struct device *dev,
2040                            struct device_attribute *attr,
2041                            char *buf)
2042 {
2043         return snprintf(buf, PAGE_SIZE, "%d\n", hotkey_poll_freq);
2044 }
2045
2046 static ssize_t hotkey_poll_freq_store(struct device *dev,
2047                             struct device_attribute *attr,
2048                             const char *buf, size_t count)
2049 {
2050         unsigned long t;
2051
2052         if (parse_strtoul(buf, 25, &t))
2053                 return -EINVAL;
2054
2055         if (mutex_lock_interruptible(&hotkey_mutex))
2056                 return -ERESTARTSYS;
2057
2058         hotkey_poll_freq = t;
2059
2060         hotkey_poll_setup(1);
2061         mutex_unlock(&hotkey_mutex);
2062
2063         return count;
2064 }
2065
2066 static struct device_attribute dev_attr_hotkey_poll_freq =
2067         __ATTR(hotkey_poll_freq, S_IWUSR | S_IRUGO,
2068                 hotkey_poll_freq_show, hotkey_poll_freq_store);
2069
2070 #endif /* CONFIG_THINKPAD_ACPI_HOTKEY_POLL */
2071
2072 /* sysfs hotkey radio_sw ----------------------------------------------- */
2073 static ssize_t hotkey_radio_sw_show(struct device *dev,
2074                            struct device_attribute *attr,
2075                            char *buf)
2076 {
2077         int res, s;
2078         res = hotkey_get_wlsw(&s);
2079         if (res < 0)
2080                 return res;
2081
2082         return snprintf(buf, PAGE_SIZE, "%d\n", !!s);
2083 }
2084
2085 static struct device_attribute dev_attr_hotkey_radio_sw =
2086         __ATTR(hotkey_radio_sw, S_IRUGO, hotkey_radio_sw_show, NULL);
2087
2088 /* sysfs hotkey report_mode -------------------------------------------- */
2089 static ssize_t hotkey_report_mode_show(struct device *dev,
2090                            struct device_attribute *attr,
2091                            char *buf)
2092 {
2093         return snprintf(buf, PAGE_SIZE, "%d\n",
2094                 (hotkey_report_mode != 0) ? hotkey_report_mode : 1);
2095 }
2096
2097 static struct device_attribute dev_attr_hotkey_report_mode =
2098         __ATTR(hotkey_report_mode, S_IRUGO, hotkey_report_mode_show, NULL);
2099
2100 /* --------------------------------------------------------------------- */
2101
2102 static struct attribute *hotkey_attributes[] __initdata = {
2103         &dev_attr_hotkey_enable.attr,
2104         &dev_attr_hotkey_bios_enabled.attr,
2105         &dev_attr_hotkey_report_mode.attr,
2106 #ifdef CONFIG_THINKPAD_ACPI_HOTKEY_POLL
2107         &dev_attr_hotkey_mask.attr,
2108         &dev_attr_hotkey_all_mask.attr,
2109         &dev_attr_hotkey_recommended_mask.attr,
2110         &dev_attr_hotkey_source_mask.attr,
2111         &dev_attr_hotkey_poll_freq.attr,
2112 #endif
2113 };
2114
2115 static struct attribute *hotkey_mask_attributes[] __initdata = {
2116         &dev_attr_hotkey_bios_mask.attr,
2117 #ifndef CONFIG_THINKPAD_ACPI_HOTKEY_POLL
2118         &dev_attr_hotkey_mask.attr,
2119         &dev_attr_hotkey_all_mask.attr,
2120         &dev_attr_hotkey_recommended_mask.attr,
2121 #endif
2122 };
2123
2124 static int __init hotkey_init(struct ibm_init_struct *iibm)
2125 {
2126         /* Requirements for changing the default keymaps:
2127          *
2128          * 1. Many of the keys are mapped to KEY_RESERVED for very
2129          *    good reasons.  Do not change them unless you have deep
2130          *    knowledge on the IBM and Lenovo ThinkPad firmware for
2131          *    the various ThinkPad models.  The driver behaves
2132          *    differently for KEY_RESERVED: such keys have their
2133          *    hot key mask *unset* in mask_recommended, and also
2134          *    in the initial hot key mask programmed into the
2135          *    firmware at driver load time, which means the firm-
2136          *    ware may react very differently if you change them to
2137          *    something else;
2138          *
2139          * 2. You must be subscribed to the linux-thinkpad and
2140          *    ibm-acpi-devel mailing lists, and you should read the
2141          *    list archives since 2007 if you want to change the
2142          *    keymaps.  This requirement exists so that you will
2143          *    know the past history of problems with the thinkpad-
2144          *    acpi driver keymaps, and also that you will be
2145          *    listening to any bug reports;
2146          *
2147          * 3. Do not send thinkpad-acpi specific patches directly to
2148          *    for merging, *ever*.  Send them to the linux-acpi
2149          *    mailinglist for comments.  Merging is to be done only
2150          *    through acpi-test and the ACPI maintainer.
2151          *
2152          * If the above is too much to ask, don't change the keymap.
2153          * Ask the thinkpad-acpi maintainer to do it, instead.
2154          */
2155         static u16 ibm_keycode_map[] __initdata = {
2156                 /* Scan Codes 0x00 to 0x0B: ACPI HKEY FN+F1..F12 */
2157                 KEY_FN_F1,      KEY_FN_F2,      KEY_COFFEE,     KEY_SLEEP,
2158                 KEY_WLAN,       KEY_FN_F6, KEY_SWITCHVIDEOMODE, KEY_FN_F8,
2159                 KEY_FN_F9,      KEY_FN_F10,     KEY_FN_F11,     KEY_SUSPEND,
2160
2161                 /* Scan codes 0x0C to 0x1F: Other ACPI HKEY hot keys */
2162                 KEY_UNKNOWN,    /* 0x0C: FN+BACKSPACE */
2163                 KEY_UNKNOWN,    /* 0x0D: FN+INSERT */
2164                 KEY_UNKNOWN,    /* 0x0E: FN+DELETE */
2165
2166                 /* brightness: firmware always reacts to them, unless
2167                  * X.org did some tricks in the radeon BIOS scratch
2168                  * registers of *some* models */
2169                 KEY_RESERVED,   /* 0x0F: FN+HOME (brightness up) */
2170                 KEY_RESERVED,   /* 0x10: FN+END (brightness down) */
2171
2172                 /* Thinklight: firmware always react to it */
2173                 KEY_RESERVED,   /* 0x11: FN+PGUP (thinklight toggle) */
2174
2175                 KEY_UNKNOWN,    /* 0x12: FN+PGDOWN */
2176                 KEY_ZOOM,       /* 0x13: FN+SPACE (zoom) */
2177
2178                 /* Volume: firmware always react to it and reprograms
2179                  * the built-in *extra* mixer.  Never map it to control
2180                  * another mixer by default. */
2181                 KEY_RESERVED,   /* 0x14: VOLUME UP */
2182                 KEY_RESERVED,   /* 0x15: VOLUME DOWN */
2183                 KEY_RESERVED,   /* 0x16: MUTE */
2184
2185                 KEY_VENDOR,     /* 0x17: Thinkpad/AccessIBM/Lenovo */
2186
2187                 /* (assignments unknown, please report if found) */
2188                 KEY_UNKNOWN, KEY_UNKNOWN, KEY_UNKNOWN, KEY_UNKNOWN,
2189                 KEY_UNKNOWN, KEY_UNKNOWN, KEY_UNKNOWN, KEY_UNKNOWN,
2190         };
2191         static u16 lenovo_keycode_map[] __initdata = {
2192                 /* Scan Codes 0x00 to 0x0B: ACPI HKEY FN+F1..F12 */
2193                 KEY_FN_F1,      KEY_COFFEE,     KEY_BATTERY,    KEY_SLEEP,
2194                 KEY_WLAN,       KEY_FN_F6, KEY_SWITCHVIDEOMODE, KEY_FN_F8,
2195                 KEY_FN_F9,      KEY_FN_F10,     KEY_FN_F11,     KEY_SUSPEND,
2196
2197                 /* Scan codes 0x0C to 0x1F: Other ACPI HKEY hot keys */
2198                 KEY_UNKNOWN,    /* 0x0C: FN+BACKSPACE */
2199                 KEY_UNKNOWN,    /* 0x0D: FN+INSERT */
2200                 KEY_UNKNOWN,    /* 0x0E: FN+DELETE */
2201
2202                 KEY_RESERVED,   /* 0x0F: FN+HOME (brightness up) */
2203                 KEY_RESERVED,   /* 0x10: FN+END (brightness down) */
2204
2205                 KEY_RESERVED,   /* 0x11: FN+PGUP (thinklight toggle) */
2206
2207                 KEY_UNKNOWN,    /* 0x12: FN+PGDOWN */
2208                 KEY_ZOOM,       /* 0x13: FN+SPACE (zoom) */
2209
2210                 /* Volume: z60/z61, T60 (BIOS version?): firmware always
2211                  * react to it and reprograms the built-in *extra* mixer.
2212                  * Never map it to control another mixer by default.
2213                  *
2214                  * T60?, T61, R60?, R61: firmware and EC tries to send
2215                  * these over the regular keyboard, so these are no-ops,
2216                  * but there are still weird bugs re. MUTE, so do not
2217                  * change unless you get test reports from all Lenovo
2218                  * models.  May cause the BIOS to interfere with the
2219                  * HDA mixer.
2220                  */
2221                 KEY_RESERVED,   /* 0x14: VOLUME UP */
2222                 KEY_RESERVED,   /* 0x15: VOLUME DOWN */
2223                 KEY_RESERVED,   /* 0x16: MUTE */
2224
2225                 KEY_VENDOR,     /* 0x17: Thinkpad/AccessIBM/Lenovo */
2226
2227                 /* (assignments unknown, please report if found) */
2228                 KEY_UNKNOWN, KEY_UNKNOWN, KEY_UNKNOWN, KEY_UNKNOWN,
2229                 KEY_UNKNOWN, KEY_UNKNOWN, KEY_UNKNOWN, KEY_UNKNOWN,
2230         };
2231
2232 #define TPACPI_HOTKEY_MAP_LEN           ARRAY_SIZE(ibm_keycode_map)
2233 #define TPACPI_HOTKEY_MAP_SIZE          sizeof(ibm_keycode_map)
2234 #define TPACPI_HOTKEY_MAP_TYPESIZE      sizeof(ibm_keycode_map[0])
2235
2236         int res, i;
2237         int status;
2238         int hkeyv;
2239
2240         vdbg_printk(TPACPI_DBG_INIT, "initializing hotkey subdriver\n");
2241
2242         BUG_ON(!tpacpi_inputdev);
2243         BUG_ON(tpacpi_inputdev->open != NULL ||
2244                tpacpi_inputdev->close != NULL);
2245
2246         IBM_ACPIHANDLE_INIT(hkey);
2247         mutex_init(&hotkey_mutex);
2248
2249 #ifdef CONFIG_THINKPAD_ACPI_HOTKEY_POLL
2250         mutex_init(&hotkey_thread_mutex);
2251         mutex_init(&hotkey_thread_data_mutex);
2252 #endif
2253
2254         /* hotkey not supported on 570 */
2255         tp_features.hotkey = hkey_handle != NULL;
2256
2257         vdbg_printk(TPACPI_DBG_INIT, "hotkeys are %s\n",
2258                 str_supported(tp_features.hotkey));
2259
2260         if (tp_features.hotkey) {
2261                 hotkey_dev_attributes = create_attr_set(10, NULL);
2262                 if (!hotkey_dev_attributes)
2263                         return -ENOMEM;
2264                 res = add_many_to_attr_set(hotkey_dev_attributes,
2265                                 hotkey_attributes,
2266                                 ARRAY_SIZE(hotkey_attributes));
2267                 if (res)
2268                         return res;
2269
2270                 /* mask not supported on 570, 600e/x, 770e, 770x, A21e, A2xm/p,
2271                    A30, R30, R31, T20-22, X20-21, X22-24.  Detected by checking
2272                    for HKEY interface version 0x100 */
2273                 if (acpi_evalf(hkey_handle, &hkeyv, "MHKV", "qd")) {
2274                         if ((hkeyv >> 8) != 1) {
2275                                 printk(IBM_ERR "unknown version of the "
2276                                        "HKEY interface: 0x%x\n", hkeyv);
2277                                 printk(IBM_ERR "please report this to %s\n",
2278                                        IBM_MAIL);
2279                         } else {
2280                                 /*
2281                                  * MHKV 0x100 in A31, R40, R40e,
2282                                  * T4x, X31, and later
2283                                  */
2284                                 tp_features.hotkey_mask = 1;
2285                         }
2286                 }
2287
2288                 vdbg_printk(TPACPI_DBG_INIT, "hotkey masks are %s\n",
2289                         str_supported(tp_features.hotkey_mask));
2290
2291                 if (tp_features.hotkey_mask) {
2292                         if (!acpi_evalf(hkey_handle, &hotkey_all_mask,
2293                                         "MHKA", "qd")) {
2294                                 printk(IBM_ERR
2295                                        "missing MHKA handler, "
2296                                        "please report this to %s\n",
2297                                        IBM_MAIL);
2298                                 hotkey_all_mask = 0x080cU; /* FN+F12, FN+F4, FN+F3 */
2299                         }
2300                 }
2301
2302                 /* hotkey_source_mask *must* be zero for
2303                  * the first hotkey_mask_get */
2304                 res = hotkey_status_get(&hotkey_orig_status);
2305                 if (!res && tp_features.hotkey_mask) {
2306                         res = hotkey_mask_get();
2307                         hotkey_orig_mask = hotkey_mask;
2308                         if (!res) {
2309                                 res = add_many_to_attr_set(
2310                                         hotkey_dev_attributes,
2311                                         hotkey_mask_attributes,
2312                                         ARRAY_SIZE(hotkey_mask_attributes));
2313                         }
2314                 }
2315
2316 #ifdef CONFIG_THINKPAD_ACPI_HOTKEY_POLL
2317                 if (tp_features.hotkey_mask) {
2318                         hotkey_source_mask = TPACPI_HKEY_NVRAM_GOOD_MASK
2319                                                 & ~hotkey_all_mask;
2320                 } else {
2321                         hotkey_source_mask = TPACPI_HKEY_NVRAM_GOOD_MASK;
2322                 }
2323
2324                 vdbg_printk(TPACPI_DBG_INIT,
2325                             "hotkey source mask 0x%08x, polling freq %d\n",
2326                             hotkey_source_mask, hotkey_poll_freq);
2327 #endif
2328
2329                 /* Not all thinkpads have a hardware radio switch */
2330                 if (!res && acpi_evalf(hkey_handle, &status, "WLSW", "qd")) {
2331                         tp_features.hotkey_wlsw = 1;
2332                         printk(IBM_INFO
2333                                 "radio switch found; radios are %s\n",
2334                                 enabled(status, 0));
2335                         res = add_to_attr_set(hotkey_dev_attributes,
2336                                         &dev_attr_hotkey_radio_sw.attr);
2337                 }
2338
2339                 if (!res)
2340                         res = register_attr_set_with_sysfs(
2341                                         hotkey_dev_attributes,
2342                                         &tpacpi_pdev->dev.kobj);
2343                 if (res)
2344                         return res;
2345
2346                 /* Set up key map */
2347
2348                 hotkey_keycode_map = kmalloc(TPACPI_HOTKEY_MAP_SIZE,
2349                                                 GFP_KERNEL);
2350                 if (!hotkey_keycode_map) {
2351                         printk(IBM_ERR "failed to allocate memory for key map\n");
2352                         return -ENOMEM;
2353                 }
2354
2355                 if (thinkpad_id.vendor == PCI_VENDOR_ID_LENOVO) {
2356                         dbg_printk(TPACPI_DBG_INIT,
2357                                    "using Lenovo default hot key map\n");
2358                         memcpy(hotkey_keycode_map, &lenovo_keycode_map,
2359                                 TPACPI_HOTKEY_MAP_SIZE);
2360                 } else {
2361                         dbg_printk(TPACPI_DBG_INIT,
2362                                    "using IBM default hot key map\n");
2363                         memcpy(hotkey_keycode_map, &ibm_keycode_map,
2364                                 TPACPI_HOTKEY_MAP_SIZE);
2365                 }
2366
2367                 set_bit(EV_KEY, tpacpi_inputdev->evbit);
2368                 set_bit(EV_MSC, tpacpi_inputdev->evbit);
2369                 set_bit(MSC_SCAN, tpacpi_inputdev->mscbit);
2370                 tpacpi_inputdev->keycodesize = TPACPI_HOTKEY_MAP_TYPESIZE;
2371                 tpacpi_inputdev->keycodemax = TPACPI_HOTKEY_MAP_LEN;
2372                 tpacpi_inputdev->keycode = hotkey_keycode_map;
2373                 for (i = 0; i < TPACPI_HOTKEY_MAP_LEN; i++) {
2374                         if (hotkey_keycode_map[i] != KEY_RESERVED) {
2375                                 set_bit(hotkey_keycode_map[i],
2376                                         tpacpi_inputdev->keybit);
2377                         } else {
2378                                 if (i < sizeof(hotkey_reserved_mask)*8)
2379                                         hotkey_reserved_mask |= 1 << i;
2380                         }
2381                 }
2382
2383                 if (tp_features.hotkey_wlsw) {
2384                         set_bit(EV_SW, tpacpi_inputdev->evbit);
2385                         set_bit(SW_RADIO, tpacpi_inputdev->swbit);
2386                 }
2387
2388                 dbg_printk(TPACPI_DBG_INIT,
2389                                 "enabling hot key handling\n");
2390                 res = hotkey_status_set(1);
2391                 if (res)
2392                         return res;
2393                 res = hotkey_mask_set(((hotkey_all_mask | hotkey_source_mask)
2394                                         & ~hotkey_reserved_mask)
2395                                         | hotkey_orig_mask);
2396                 if (res < 0 && res != -ENXIO)
2397                         return res;
2398
2399                 dbg_printk(TPACPI_DBG_INIT,
2400                                 "legacy hot key reporting over procfs %s\n",
2401                                 (hotkey_report_mode < 2) ?
2402                                         "enabled" : "disabled");
2403
2404 #ifdef CONFIG_THINKPAD_ACPI_HOTKEY_POLL
2405                 tpacpi_inputdev->open = &hotkey_inputdev_open;
2406                 tpacpi_inputdev->close = &hotkey_inputdev_close;
2407
2408                 hotkey_poll_setup_safe(1);
2409 #endif
2410         }
2411
2412         return (tp_features.hotkey)? 0 : 1;
2413 }
2414
2415 static void hotkey_exit(void)
2416 {
2417 #ifdef CONFIG_THINKPAD_ACPI_HOTKEY_POLL
2418         hotkey_poll_stop_sync();
2419 #endif
2420
2421         if (tp_features.hotkey) {
2422                 dbg_printk(TPACPI_DBG_EXIT, "restoring original hot key mask\n");
2423                 /* no short-circuit boolean operator below! */
2424                 if ((hotkey_mask_set(hotkey_orig_mask) |
2425                      hotkey_status_set(hotkey_orig_status)) != 0)
2426                         printk(IBM_ERR "failed to restore hot key mask to BIOS defaults\n");
2427         }
2428
2429         if (hotkey_dev_attributes) {
2430                 delete_attr_set(hotkey_dev_attributes, &tpacpi_pdev->dev.kobj);
2431                 hotkey_dev_attributes = NULL;
2432         }
2433 }
2434
2435 static void hotkey_notify(struct ibm_struct *ibm, u32 event)
2436 {
2437         u32 hkey;
2438         unsigned int scancode;
2439         int send_acpi_ev;
2440         int ignore_acpi_ev;
2441
2442         if (event != 0x80) {
2443                 printk(IBM_ERR "unknown HKEY notification event %d\n", event);
2444                 /* forward it to userspace, maybe it knows how to handle it */
2445                 acpi_bus_generate_netlink_event(ibm->acpi->device->pnp.device_class,
2446                                                 ibm->acpi->device->dev.bus_id,
2447                                                 event, 0);
2448                 return;
2449         }
2450
2451         while (1) {
2452                 if (!acpi_evalf(hkey_handle, &hkey, "MHKP", "d")) {
2453                         printk(IBM_ERR "failed to retrieve HKEY event\n");
2454                         return;
2455                 }
2456
2457                 if (hkey == 0) {
2458                         /* queue empty */
2459                         return;
2460                 }
2461
2462                 send_acpi_ev = 0;
2463                 ignore_acpi_ev = 0;
2464
2465                 switch (hkey >> 12) {
2466                 case 1:
2467                         /* 0x1000-0x1FFF: key presses */
2468                         scancode = hkey & 0xfff;
2469                         if (scancode > 0 && scancode < 0x21) {
2470                                 scancode--;
2471                                 if (!(hotkey_source_mask & (1 << scancode))) {
2472                                         tpacpi_input_send_key(scancode);
2473                                 } else {
2474                                         ignore_acpi_ev = 1;
2475                                 }
2476                         } else {
2477                                 printk(IBM_ERR
2478                                        "hotkey 0x%04x out of range for keyboard map\n",
2479                                        hkey);
2480                                 send_acpi_ev = 1;
2481                         }
2482                         break;
2483                 case 5:
2484                         /* 0x5000-0x5FFF: LID */
2485                         /* we don't handle it through this path, just
2486                          * eat up known LID events */
2487                         if (hkey != 0x5001 && hkey != 0x5002) {
2488                                 printk(IBM_ERR
2489                                        "unknown LID-related HKEY event: 0x%04x\n",
2490                                        hkey);
2491                                 send_acpi_ev = 1;
2492                         } else {
2493                                 ignore_acpi_ev = 1;
2494                         }
2495                         break;
2496                 case 7:
2497                         /* 0x7000-0x7FFF: misc */
2498                         if (tp_features.hotkey_wlsw && hkey == 0x7000) {
2499                                 tpacpi_input_send_radiosw();
2500                                 break;
2501                         }
2502                         /* fallthrough to default */
2503                 default:
2504                         /* case 2: dock-related */
2505                         /*      0x2305 - T43 waking up due to bay lever eject while aslept */
2506                         /* case 3: ultra-bay related. maybe bay in dock? */
2507                         /*      0x3003 - T43 after wake up by bay lever eject (0x2305) */
2508                         printk(IBM_NOTICE "unhandled HKEY event 0x%04x\n", hkey);
2509                         send_acpi_ev = 1;
2510                 }
2511
2512                 /* Legacy events */
2513                 if (!ignore_acpi_ev && (send_acpi_ev || hotkey_report_mode < 2)) {
2514                         acpi_bus_generate_proc_event(ibm->acpi->device, event, hkey);
2515                 }
2516
2517                 /* netlink events */
2518                 if (!ignore_acpi_ev && send_acpi_ev) {
2519                         acpi_bus_generate_netlink_event(ibm->acpi->device->pnp.device_class,
2520                                                         ibm->acpi->device->dev.bus_id,
2521                                                         event, hkey);
2522                 }
2523         }
2524 }
2525
2526 static void hotkey_resume(void)
2527 {
2528         if (hotkey_mask_get())
2529                 printk(IBM_ERR "error while trying to read hot key mask from firmware\n");
2530         tpacpi_input_send_radiosw();
2531 #ifdef CONFIG_THINKPAD_ACPI_HOTKEY_POLL
2532         hotkey_poll_setup_safe(0);
2533 #endif
2534 }
2535
2536 /* procfs -------------------------------------------------------------- */
2537 static int hotkey_read(char *p)
2538 {
2539         int res, status;
2540         int len = 0;
2541
2542         if (!tp_features.hotkey) {
2543                 len += sprintf(p + len, "status:\t\tnot supported\n");
2544                 return len;
2545         }
2546
2547         if (mutex_lock_interruptible(&hotkey_mutex))
2548                 return -ERESTARTSYS;
2549         res = hotkey_status_get(&status);
2550         if (!res)
2551                 res = hotkey_mask_get();
2552         mutex_unlock(&hotkey_mutex);
2553         if (res)
2554                 return res;
2555
2556         len += sprintf(p + len, "status:\t\t%s\n", enabled(status, 0));
2557         if (tp_features.hotkey_mask) {
2558                 len += sprintf(p + len, "mask:\t\t0x%08x\n", hotkey_mask);
2559                 len += sprintf(p + len,
2560                                "commands:\tenable, disable, reset, <mask>\n");
2561         } else {
2562                 len += sprintf(p + len, "mask:\t\tnot supported\n");
2563                 len += sprintf(p + len, "commands:\tenable, disable, reset\n");
2564         }
2565
2566         return len;
2567 }
2568
2569 static int hotkey_write(char *buf)
2570 {
2571         int res, status;
2572         u32 mask;
2573         char *cmd;
2574
2575         if (!tp_features.hotkey)
2576                 return -ENODEV;
2577
2578         if (mutex_lock_interruptible(&hotkey_mutex))
2579                 return -ERESTARTSYS;
2580
2581         status = -1;
2582         mask = hotkey_mask;
2583
2584         res = 0;
2585         while ((cmd = next_cmd(&buf))) {
2586                 if (strlencmp(cmd, "enable") == 0) {
2587                         status = 1;
2588                 } else if (strlencmp(cmd, "disable") == 0) {
2589                         status = 0;
2590                 } else if (strlencmp(cmd, "reset") == 0) {
2591                         status = hotkey_orig_status;
2592                         mask = hotkey_orig_mask;
2593                 } else if (sscanf(cmd, "0x%x", &mask) == 1) {
2594                         /* mask set */
2595                 } else if (sscanf(cmd, "%x", &mask) == 1) {
2596                         /* mask set */
2597                 } else {
2598                         res = -EINVAL;
2599                         goto errexit;
2600                 }
2601         }
2602         if (status != -1)
2603                 res = hotkey_status_set(status);
2604
2605         if (!res && mask != hotkey_mask)
2606                 res = hotkey_mask_set(mask);
2607
2608 errexit:
2609         mutex_unlock(&hotkey_mutex);
2610         return res;
2611 }
2612
2613 static const struct acpi_device_id ibm_htk_device_ids[] = {
2614         {IBM_HKEY_HID, 0},
2615         {"", 0},
2616 };
2617
2618 static struct tp_acpi_drv_struct ibm_hotkey_acpidriver = {
2619         .hid = ibm_htk_device_ids,
2620         .notify = hotkey_notify,
2621         .handle = &hkey_handle,
2622         .type = ACPI_DEVICE_NOTIFY,
2623 };
2624
2625 static struct ibm_struct hotkey_driver_data = {
2626         .name = "hotkey",
2627         .read = hotkey_read,
2628         .write = hotkey_write,
2629         .exit = hotkey_exit,
2630         .resume = hotkey_resume,
2631         .acpi = &ibm_hotkey_acpidriver,
2632 };
2633
2634 /*************************************************************************
2635  * Bluetooth subdriver
2636  */
2637
2638 /* sysfs bluetooth enable ---------------------------------------------- */
2639 static ssize_t bluetooth_enable_show(struct device *dev,
2640                            struct device_attribute *attr,
2641                            char *buf)
2642 {
2643         int status;
2644
2645         status = bluetooth_get_radiosw();
2646         if (status < 0)
2647                 return status;
2648
2649         return snprintf(buf, PAGE_SIZE, "%d\n", status ? 1 : 0);
2650 }
2651
2652 static ssize_t bluetooth_enable_store(struct device *dev,
2653                             struct device_attribute *attr,
2654                             const char *buf, size_t count)
2655 {
2656         unsigned long t;
2657         int res;
2658
2659         if (parse_strtoul(buf, 1, &t))
2660                 return -EINVAL;
2661
2662         res = bluetooth_set_radiosw(t);
2663
2664         return (res) ? res : count;
2665 }
2666
2667 static struct device_attribute dev_attr_bluetooth_enable =
2668         __ATTR(bluetooth_enable, S_IWUSR | S_IRUGO,
2669                 bluetooth_enable_show, bluetooth_enable_store);
2670
2671 /* --------------------------------------------------------------------- */
2672
2673 static struct attribute *bluetooth_attributes[] = {
2674         &dev_attr_bluetooth_enable.attr,
2675         NULL
2676 };
2677
2678 static const struct attribute_group bluetooth_attr_group = {
2679         .attrs = bluetooth_attributes,
2680 };
2681
2682 static int __init bluetooth_init(struct ibm_init_struct *iibm)
2683 {
2684         int res;
2685         int status = 0;
2686
2687         vdbg_printk(TPACPI_DBG_INIT, "initializing bluetooth subdriver\n");
2688
2689         IBM_ACPIHANDLE_INIT(hkey);
2690
2691         /* bluetooth not supported on 570, 600e/x, 770e, 770x, A21e, A2xm/p,
2692            G4x, R30, R31, R40e, R50e, T20-22, X20-21 */
2693         tp_features.bluetooth = hkey_handle &&
2694             acpi_evalf(hkey_handle, &status, "GBDC", "qd");
2695
2696         vdbg_printk(TPACPI_DBG_INIT, "bluetooth is %s, status 0x%02x\n",
2697                 str_supported(tp_features.bluetooth),
2698                 status);
2699
2700         if (tp_features.bluetooth) {
2701                 if (!(status & TP_ACPI_BLUETOOTH_HWPRESENT)) {
2702                         /* no bluetooth hardware present in system */
2703                         tp_features.bluetooth = 0;
2704                         dbg_printk(TPACPI_DBG_INIT,
2705                                    "bluetooth hardware not installed\n");
2706                 } else {
2707                         res = sysfs_create_group(&tpacpi_pdev->dev.kobj,
2708                                         &bluetooth_attr_group);
2709                         if (res)
2710                                 return res;
2711                 }
2712         }
2713
2714         return (tp_features.bluetooth)? 0 : 1;
2715 }
2716
2717 static void bluetooth_exit(void)
2718 {
2719         sysfs_remove_group(&tpacpi_pdev->dev.kobj,
2720                         &bluetooth_attr_group);
2721 }
2722
2723 static int bluetooth_get_radiosw(void)
2724 {
2725         int status;
2726
2727         if (!tp_features.bluetooth)
2728                 return -ENODEV;
2729
2730         if (!acpi_evalf(hkey_handle, &status, "GBDC", "d"))
2731                 return -EIO;
2732
2733         return ((status & TP_ACPI_BLUETOOTH_RADIOSSW) != 0);
2734 }
2735
2736 static int bluetooth_set_radiosw(int radio_on)
2737 {
2738         int status;
2739
2740         if (!tp_features.bluetooth)
2741                 return -ENODEV;
2742
2743         if (!acpi_evalf(hkey_handle, &status, "GBDC", "d"))
2744                 return -EIO;
2745         if (radio_on)
2746                 status |= TP_ACPI_BLUETOOTH_RADIOSSW;
2747         else
2748                 status &= ~TP_ACPI_BLUETOOTH_RADIOSSW;
2749         if (!acpi_evalf(hkey_handle, NULL, "SBDC", "vd", status))
2750                 return -EIO;
2751
2752         return 0;
2753 }
2754
2755 /* procfs -------------------------------------------------------------- */
2756 static int bluetooth_read(char *p)
2757 {
2758         int len = 0;
2759         int status = bluetooth_get_radiosw();
2760
2761         if (!tp_features.bluetooth)
2762                 len += sprintf(p + len, "status:\t\tnot supported\n");
2763         else {
2764                 len += sprintf(p + len, "status:\t\t%s\n",
2765                                 (status)? "enabled" : "disabled");
2766                 len += sprintf(p + len, "commands:\tenable, disable\n");
2767         }
2768
2769         return len;
2770 }
2771
2772 static int bluetooth_write(char *buf)
2773 {
2774         char *cmd;
2775
2776         if (!tp_features.bluetooth)
2777                 return -ENODEV;
2778
2779         while ((cmd = next_cmd(&buf))) {
2780                 if (strlencmp(cmd, "enable") == 0) {
2781                         bluetooth_set_radiosw(1);
2782                 } else if (strlencmp(cmd, "disable") == 0) {
2783                         bluetooth_set_radiosw(0);
2784                 } else
2785                         return -EINVAL;
2786         }
2787
2788         return 0;
2789 }
2790
2791 static struct ibm_struct bluetooth_driver_data = {
2792         .name = "bluetooth",
2793         .read = bluetooth_read,
2794         .write = bluetooth_write,
2795         .exit = bluetooth_exit,
2796 };
2797
2798 /*************************************************************************
2799  * Wan subdriver
2800  */
2801
2802 /* sysfs wan enable ---------------------------------------------------- */
2803 static ssize_t wan_enable_show(struct device *dev,
2804                            struct device_attribute *attr,
2805                            char *buf)
2806 {
2807         int status;
2808
2809         status = wan_get_radiosw();
2810         if (status < 0)
2811                 return status;
2812
2813         return snprintf(buf, PAGE_SIZE, "%d\n", status ? 1 : 0);
2814 }
2815
2816 static ssize_t wan_enable_store(struct device *dev,
2817                             struct device_attribute *attr,
2818                             const char *buf, size_t count)
2819 {
2820         unsigned long t;
2821         int res;
2822
2823         if (parse_strtoul(buf, 1, &t))
2824                 return -EINVAL;
2825
2826         res = wan_set_radiosw(t);
2827
2828         return (res) ? res : count;
2829 }
2830
2831 static struct device_attribute dev_attr_wan_enable =
2832         __ATTR(wwan_enable, S_IWUSR | S_IRUGO,
2833                 wan_enable_show, wan_enable_store);
2834
2835 /* --------------------------------------------------------------------- */
2836
2837 static struct attribute *wan_attributes[] = {
2838         &dev_attr_wan_enable.attr,
2839         NULL
2840 };
2841
2842 static const struct attribute_group wan_attr_group = {
2843         .attrs = wan_attributes,
2844 };
2845
2846 static int __init wan_init(struct ibm_init_struct *iibm)
2847 {
2848         int res;
2849         int status = 0;
2850
2851         vdbg_printk(TPACPI_DBG_INIT, "initializing wan subdriver\n");
2852
2853         IBM_ACPIHANDLE_INIT(hkey);
2854
2855         tp_features.wan = hkey_handle &&
2856             acpi_evalf(hkey_handle, &status, "GWAN", "qd");
2857
2858         vdbg_printk(TPACPI_DBG_INIT, "wan is %s, status 0x%02x\n",
2859                 str_supported(tp_features.wan),
2860                 status);
2861
2862         if (tp_features.wan) {
2863                 if (!(status & TP_ACPI_WANCARD_HWPRESENT)) {
2864                         /* no wan hardware present in system */
2865                         tp_features.wan = 0;
2866                         dbg_printk(TPACPI_DBG_INIT,
2867                                    "wan hardware not installed\n");
2868                 } else {
2869                         res = sysfs_create_group(&tpacpi_pdev->dev.kobj,
2870                                         &wan_attr_group);
2871                         if (res)
2872                                 return res;
2873                 }
2874         }
2875
2876         return (tp_features.wan)? 0 : 1;
2877 }
2878
2879 static void wan_exit(void)
2880 {
2881         sysfs_remove_group(&tpacpi_pdev->dev.kobj,
2882                 &wan_attr_group);
2883 }
2884
2885 static int wan_get_radiosw(void)
2886 {
2887         int status;
2888
2889         if (!tp_features.wan)
2890                 return -ENODEV;
2891
2892         if (!acpi_evalf(hkey_handle, &status, "GWAN", "d"))
2893                 return -EIO;
2894
2895         return ((status & TP_ACPI_WANCARD_RADIOSSW) != 0);
2896 }
2897
2898 static int wan_set_radiosw(int radio_on)
2899 {
2900         int status;
2901
2902         if (!tp_features.wan)
2903                 return -ENODEV;
2904
2905         if (!acpi_evalf(hkey_handle, &status, "GWAN", "d"))
2906                 return -EIO;
2907         if (radio_on)
2908                 status |= TP_ACPI_WANCARD_RADIOSSW;
2909         else
2910                 status &= ~TP_ACPI_WANCARD_RADIOSSW;
2911         if (!acpi_evalf(hkey_handle, NULL, "SWAN", "vd", status))
2912                 return -EIO;
2913
2914         return 0;
2915 }
2916
2917 /* procfs -------------------------------------------------------------- */
2918 static int wan_read(char *p)
2919 {
2920         int len = 0;
2921         int status = wan_get_radiosw();
2922
2923         if (!tp_features.wan)
2924                 len += sprintf(p + len, "status:\t\tnot supported\n");
2925         else {
2926                 len += sprintf(p + len, "status:\t\t%s\n",
2927                                 (status)? "enabled" : "disabled");
2928                 len += sprintf(p + len, "commands:\tenable, disable\n");
2929         }
2930
2931         return len;
2932 }
2933
2934 static int wan_write(char *buf)
2935 {
2936         char *cmd;
2937
2938         if (!tp_features.wan)
2939                 return -ENODEV;
2940
2941         while ((cmd = next_cmd(&buf))) {
2942                 if (strlencmp(cmd, "enable") == 0) {
2943                         wan_set_radiosw(1);
2944                 } else if (strlencmp(cmd, "disable") == 0) {
2945                         wan_set_radiosw(0);
2946                 } else
2947                         return -EINVAL;
2948         }
2949
2950         return 0;
2951 }
2952
2953 static struct ibm_struct wan_driver_data = {
2954         .name = "wan",
2955         .read = wan_read,
2956         .write = wan_write,
2957         .exit = wan_exit,
2958         .flags.experimental = 1,
2959 };
2960
2961 /*************************************************************************
2962  * Video subdriver
2963  */
2964
2965 static enum video_access_mode video_supported;
2966 static int video_orig_autosw;
2967
2968 IBM_HANDLE(vid, root, "\\_SB.PCI.AGP.VGA",      /* 570 */
2969            "\\_SB.PCI0.AGP0.VID0",      /* 600e/x, 770x */
2970            "\\_SB.PCI0.VID0",   /* 770e */
2971            "\\_SB.PCI0.VID",    /* A21e, G4x, R50e, X30, X40 */
2972            "\\_SB.PCI0.AGP.VID",        /* all others */
2973            );                           /* R30, R31 */
2974
2975 IBM_HANDLE(vid2, root, "\\_SB.PCI0.AGPB.VID");  /* G41 */
2976
2977 static int __init video_init(struct ibm_init_struct *iibm)
2978 {
2979         int ivga;
2980
2981         vdbg_printk(TPACPI_DBG_INIT, "initializing video subdriver\n");
2982
2983         IBM_ACPIHANDLE_INIT(vid);
2984         IBM_ACPIHANDLE_INIT(vid2);
2985
2986         if (vid2_handle && acpi_evalf(NULL, &ivga, "\\IVGA", "d") && ivga)
2987                 /* G41, assume IVGA doesn't change */
2988                 vid_handle = vid2_handle;
2989
2990         if (!vid_handle)
2991                 /* video switching not supported on R30, R31 */
2992                 video_supported = TPACPI_VIDEO_NONE;
2993         else if (acpi_evalf(vid_handle, &video_orig_autosw, "SWIT", "qd"))
2994                 /* 570 */
2995                 video_supported = TPACPI_VIDEO_570;
2996         else if (acpi_evalf(vid_handle, &video_orig_autosw, "^VADL", "qd"))
2997                 /* 600e/x, 770e, 770x */
2998                 video_supported = TPACPI_VIDEO_770;
2999         else
3000                 /* all others */
3001                 video_supported = TPACPI_VIDEO_NEW;
3002
3003         vdbg_printk(TPACPI_DBG_INIT, "video is %s, mode %d\n",
3004                 str_supported(video_supported != TPACPI_VIDEO_NONE),
3005                 video_supported);
3006
3007         return (video_supported != TPACPI_VIDEO_NONE)? 0 : 1;
3008 }
3009
3010 static void video_exit(void)
3011 {
3012         dbg_printk(TPACPI_DBG_EXIT,
3013                    "restoring original video autoswitch mode\n");
3014         if (video_autosw_set(video_orig_autosw))
3015                 printk(IBM_ERR "error while trying to restore original "
3016                         "video autoswitch mode\n");
3017 }
3018
3019 static int video_outputsw_get(void)
3020 {
3021         int status = 0;
3022         int i;
3023
3024         switch (video_supported) {
3025         case TPACPI_VIDEO_570:
3026                 if (!acpi_evalf(NULL, &i, "\\_SB.PHS", "dd",
3027                                  TP_ACPI_VIDEO_570_PHSCMD))
3028                         return -EIO;
3029                 status = i & TP_ACPI_VIDEO_570_PHSMASK;
3030                 break;
3031         case TPACPI_VIDEO_770:
3032                 if (!acpi_evalf(NULL, &i, "\\VCDL", "d"))
3033                         return -EIO;
3034                 if (i)
3035                         status |= TP_ACPI_VIDEO_S_LCD;
3036                 if (!acpi_evalf(NULL, &i, "\\VCDC", "d"))
3037                         return -EIO;
3038                 if (i)
3039                         status |= TP_ACPI_VIDEO_S_CRT;
3040                 break;
3041         case TPACPI_VIDEO_NEW:
3042                 if (!acpi_evalf(NULL, NULL, "\\VUPS", "vd", 1) ||
3043                     !acpi_evalf(NULL, &i, "\\VCDC", "d"))
3044                         return -EIO;
3045                 if (i)
3046                         status |= TP_ACPI_VIDEO_S_CRT;
3047
3048                 if (!acpi_evalf(NULL, NULL, "\\VUPS", "vd", 0) ||
3049                     !acpi_evalf(NULL, &i, "\\VCDL", "d"))
3050                         return -EIO;
3051                 if (i)
3052                         status |= TP_ACPI_VIDEO_S_LCD;
3053                 if (!acpi_evalf(NULL, &i, "\\VCDD", "d"))
3054                         return -EIO;
3055                 if (i)
3056                         status |= TP_ACPI_VIDEO_S_DVI;
3057                 break;
3058         default:
3059                 return -ENOSYS;
3060         }
3061
3062         return status;
3063 }
3064
3065 static int video_outputsw_set(int status)
3066 {
3067         int autosw;
3068         int res = 0;
3069
3070         switch (video_supported) {
3071         case TPACPI_VIDEO_570:
3072                 res = acpi_evalf(NULL, NULL,
3073                                  "\\_SB.PHS2", "vdd",
3074                                  TP_ACPI_VIDEO_570_PHS2CMD,
3075                                  status | TP_ACPI_VIDEO_570_PHS2SET);
3076                 break;
3077         case TPACPI_VIDEO_770:
3078                 autosw = video_autosw_get();
3079                 if (autosw < 0)
3080                         return autosw;
3081
3082                 res = video_autosw_set(1);
3083                 if (res)
3084                         return res;
3085                 res = acpi_evalf(vid_handle, NULL,
3086                                  "ASWT", "vdd", status * 0x100, 0);
3087                 if (!autosw && video_autosw_set(autosw)) {
3088                         printk(IBM_ERR "video auto-switch left enabled due to error\n");
3089                         return -EIO;
3090                 }
3091                 break;
3092         case TPACPI_VIDEO_NEW:
3093                 res = acpi_evalf(NULL, NULL, "\\VUPS", "vd", 0x80) &&
3094                         acpi_evalf(NULL, NULL, "\\VSDS", "vdd", status, 1);
3095                 break;
3096         default:
3097                 return -ENOSYS;
3098         }
3099
3100         return (res)? 0 : -EIO;
3101 }
3102
3103 static int video_autosw_get(void)
3104 {
3105         int autosw = 0;
3106
3107         switch (video_supported) {
3108         case TPACPI_VIDEO_570:
3109                 if (!acpi_evalf(vid_handle, &autosw, "SWIT", "d"))
3110                         return -EIO;
3111                 break;
3112         case TPACPI_VIDEO_770:
3113         case TPACPI_VIDEO_NEW:
3114                 if (!acpi_evalf(vid_handle, &autosw, "^VDEE", "d"))
3115                         return -EIO;
3116                 break;
3117         default:
3118                 return -ENOSYS;
3119         }
3120
3121         return autosw & 1;
3122 }
3123
3124 static int video_autosw_set(int enable)
3125 {
3126         if (!acpi_evalf(vid_handle, NULL, "_DOS", "vd", (enable)? 1 : 0))
3127                 return -EIO;
3128         return 0;
3129 }
3130
3131 static int video_outputsw_cycle(void)
3132 {
3133         int autosw = video_autosw_get();
3134         int res;
3135
3136         if (autosw < 0)
3137                 return autosw;
3138
3139         switch (video_supported) {
3140         case TPACPI_VIDEO_570:
3141                 res = video_autosw_set(1);
3142                 if (res)
3143                         return res;
3144                 res = acpi_evalf(ec_handle, NULL, "_Q16", "v");
3145                 break;
3146         case TPACPI_VIDEO_770:
3147         case TPACPI_VIDEO_NEW:
3148                 res = video_autosw_set(1);
3149                 if (res)
3150                         return res;
3151                 res = acpi_evalf(vid_handle, NULL, "VSWT", "v");
3152                 break;
3153         default:
3154                 return -ENOSYS;
3155         }
3156         if (!autosw && video_autosw_set(autosw)) {
3157                 printk(IBM_ERR "video auto-switch left enabled due to error\n");
3158                 return -EIO;
3159         }
3160
3161         return (res)? 0 : -EIO;
3162 }
3163
3164 static int video_expand_toggle(void)
3165 {
3166         switch (video_supported) {
3167         case TPACPI_VIDEO_570:
3168                 return acpi_evalf(ec_handle, NULL, "_Q17", "v")?
3169                         0 : -EIO;
3170         case TPACPI_VIDEO_770:
3171                 return acpi_evalf(vid_handle, NULL, "VEXP", "v")?
3172                         0 : -EIO;
3173         case TPACPI_VIDEO_NEW:
3174                 return acpi_evalf(NULL, NULL, "\\VEXP", "v")?
3175                         0 : -EIO;
3176         default:
3177                 return -ENOSYS;
3178         }
3179         /* not reached */
3180 }
3181
3182 static int video_read(char *p)
3183 {
3184         int status, autosw;
3185         int len = 0;
3186
3187         if (video_supported == TPACPI_VIDEO_NONE) {
3188                 len += sprintf(p + len, "status:\t\tnot supported\n");
3189                 return len;
3190         }
3191
3192         status = video_outputsw_get();
3193         if (status < 0)
3194                 return status;
3195
3196         autosw = video_autosw_get();
3197         if (autosw < 0)
3198                 return autosw;
3199
3200         len += sprintf(p + len, "status:\t\tsupported\n");
3201         len += sprintf(p + len, "lcd:\t\t%s\n", enabled(status, 0));
3202         len += sprintf(p + len, "crt:\t\t%s\n", enabled(status, 1));
3203         if (video_supported == TPACPI_VIDEO_NEW)
3204                 len += sprintf(p + len, "dvi:\t\t%s\n", enabled(status, 3));
3205         len += sprintf(p + len, "auto:\t\t%s\n", enabled(autosw, 0));
3206         len += sprintf(p + len, "commands:\tlcd_enable, lcd_disable\n");
3207         len += sprintf(p + len, "commands:\tcrt_enable, crt_disable\n");
3208         if (video_supported == TPACPI_VIDEO_NEW)
3209                 len += sprintf(p + len, "commands:\tdvi_enable, dvi_disable\n");
3210         len += sprintf(p + len, "commands:\tauto_enable, auto_disable\n");
3211         len += sprintf(p + len, "commands:\tvideo_switch, expand_toggle\n");
3212
3213         return len;
3214 }
3215
3216 static int video_write(char *buf)
3217 {
3218         char *cmd;
3219         int enable, disable, status;
3220         int res;
3221
3222         if (video_supported == TPACPI_VIDEO_NONE)
3223                 return -ENODEV;
3224
3225         enable = 0;
3226         disable = 0;
3227
3228         while ((cmd = next_cmd(&buf))) {
3229                 if (strlencmp(cmd, "lcd_enable") == 0) {
3230                         enable |= TP_ACPI_VIDEO_S_LCD;
3231                 } else if (strlencmp(cmd, "lcd_disable") == 0) {
3232                         disable |= TP_ACPI_VIDEO_S_LCD;
3233                 } else if (strlencmp(cmd, "crt_enable") == 0) {
3234                         enable |= TP_ACPI_VIDEO_S_CRT;
3235                 } else if (strlencmp(cmd, "crt_disable") == 0) {
3236                         disable |= TP_ACPI_VIDEO_S_CRT;
3237                 } else if (video_supported == TPACPI_VIDEO_NEW &&
3238                            strlencmp(cmd, "dvi_enable") == 0) {
3239                         enable |= TP_ACPI_VIDEO_S_DVI;
3240                 } else if (video_supported == TPACPI_VIDEO_NEW &&
3241                            strlencmp(cmd, "dvi_disable") == 0) {
3242                         disable |= TP_ACPI_VIDEO_S_DVI;
3243                 } else if (strlencmp(cmd, "auto_enable") == 0) {
3244                         res = video_autosw_set(1);
3245                         if (res)
3246                                 return res;
3247                 } else if (strlencmp(cmd, "auto_disable") == 0) {
3248                         res = video_autosw_set(0);
3249                         if (res)
3250                                 return res;
3251                 } else if (strlencmp(cmd, "video_switch") == 0) {
3252                         res = video_outputsw_cycle();
3253                         if (res)
3254                                 return res;
3255                 } else if (strlencmp(cmd, "expand_toggle") == 0) {
3256                         res = video_expand_toggle();
3257                         if (res)
3258                                 return res;
3259                 } else
3260                         return -EINVAL;
3261         }
3262
3263         if (enable || disable) {
3264                 status = video_outputsw_get();
3265                 if (status < 0)
3266                         return status;
3267                 res = video_outputsw_set((status & ~disable) | enable);
3268                 if (res)
3269                         return res;
3270         }
3271
3272         return 0;
3273 }
3274
3275 static struct ibm_struct video_driver_data = {
3276         .name = "video",
3277         .read = video_read,
3278         .write = video_write,
3279         .exit = video_exit,
3280 };
3281
3282 /*************************************************************************
3283  * Light (thinklight) subdriver
3284  */
3285
3286 IBM_HANDLE(lght, root, "\\LGHT");       /* A21e, A2xm/p, T20-22, X20-21 */
3287 IBM_HANDLE(ledb, ec, "LEDB");           /* G4x */
3288
3289 static int __init light_init(struct ibm_init_struct *iibm)
3290 {
3291         vdbg_printk(TPACPI_DBG_INIT, "initializing light subdriver\n");
3292
3293         IBM_ACPIHANDLE_INIT(ledb);
3294         IBM_ACPIHANDLE_INIT(lght);
3295         IBM_ACPIHANDLE_INIT(cmos);
3296
3297         /* light not supported on 570, 600e/x, 770e, 770x, G4x, R30, R31 */
3298         tp_features.light = (cmos_handle || lght_handle) && !ledb_handle;
3299
3300         if (tp_features.light)
3301                 /* light status not supported on
3302                    570, 600e/x, 770e, 770x, G4x, R30, R31, R32, X20 */
3303                 tp_features.light_status =
3304                         acpi_evalf(ec_handle, NULL, "KBLT", "qv");
3305
3306         vdbg_printk(TPACPI_DBG_INIT, "light is %s\n",
3307                 str_supported(tp_features.light));
3308
3309         return (tp_features.light)? 0 : 1;
3310 }
3311
3312 static int light_read(char *p)
3313 {
3314         int len = 0;
3315         int status = 0;
3316
3317         if (!tp_features.light) {
3318                 len += sprintf(p + len, "status:\t\tnot supported\n");
3319         } else if (!tp_features.light_status) {
3320                 len += sprintf(p + len, "status:\t\tunknown\n");
3321                 len += sprintf(p + len, "commands:\ton, off\n");
3322         } else {
3323                 if (!acpi_evalf(ec_handle, &status, "KBLT", "d"))
3324                         return -EIO;
3325                 len += sprintf(p + len, "status:\t\t%s\n", onoff(status, 0));
3326                 len += sprintf(p + len, "commands:\ton, off\n");
3327         }
3328
3329         return len;
3330 }
3331
3332 static int light_write(char *buf)
3333 {
3334         int cmos_cmd, lght_cmd;
3335         char *cmd;
3336         int success;
3337
3338         if (!tp_features.light)
3339                 return -ENODEV;
3340
3341         while ((cmd = next_cmd(&buf))) {
3342                 if (strlencmp(cmd, "on") == 0) {
3343                         cmos_cmd = 0x0c;
3344                         lght_cmd = 1;
3345                 } else if (strlencmp(cmd, "off") == 0) {
3346                         cmos_cmd = 0x0d;
3347                         lght_cmd = 0;
3348                 } else
3349                         return -EINVAL;
3350
3351                 success = cmos_handle ?
3352                     acpi_evalf(cmos_handle, NULL, NULL, "vd", cmos_cmd) :
3353                     acpi_evalf(lght_handle, NULL, NULL, "vd", lght_cmd);
3354                 if (!success)
3355                         return -EIO;
3356         }
3357
3358         return 0;
3359 }
3360
3361 static struct ibm_struct light_driver_data = {
3362         .name = "light",
3363         .read = light_read,
3364         .write = light_write,
3365 };
3366
3367 /*************************************************************************
3368  * Dock subdriver
3369  */
3370
3371 #ifdef CONFIG_THINKPAD_ACPI_DOCK
3372
3373 IBM_HANDLE(dock, root, "\\_SB.GDCK",    /* X30, X31, X40 */
3374            "\\_SB.PCI0.DOCK",   /* 600e/x,770e,770x,A2xm/p,T20-22,X20-21 */
3375            "\\_SB.PCI0.PCI1.DOCK",      /* all others */
3376            "\\_SB.PCI.ISA.SLCE",        /* 570 */
3377     );                          /* A21e,G4x,R30,R31,R32,R40,R40e,R50e */
3378
3379 /* don't list other alternatives as we install a notify handler on the 570 */
3380 IBM_HANDLE(pci, root, "\\_SB.PCI");     /* 570 */
3381
3382 static const struct acpi_device_id ibm_pci_device_ids[] = {
3383         {PCI_ROOT_HID_STRING, 0},
3384         {"", 0},
3385 };
3386
3387 static struct tp_acpi_drv_struct ibm_dock_acpidriver[2] = {
3388         {
3389          .notify = dock_notify,
3390          .handle = &dock_handle,
3391          .type = ACPI_SYSTEM_NOTIFY,
3392         },
3393         {
3394         /* THIS ONE MUST NEVER BE USED FOR DRIVER AUTOLOADING.
3395          * We just use it to get notifications of dock hotplug
3396          * in very old thinkpads */
3397          .hid = ibm_pci_device_ids,
3398          .notify = dock_notify,
3399          .handle = &pci_handle,
3400          .type = ACPI_SYSTEM_NOTIFY,
3401         },
3402 };
3403
3404 static struct ibm_struct dock_driver_data[2] = {
3405         {
3406          .name = "dock",
3407          .read = dock_read,
3408          .write = dock_write,
3409          .acpi = &ibm_dock_acpidriver[0],
3410         },
3411         {
3412          .name = "dock",
3413          .acpi = &ibm_dock_acpidriver[1],
3414         },
3415 };
3416
3417 #define dock_docked() (_sta(dock_handle) & 1)
3418
3419 static int __init dock_init(struct ibm_init_struct *iibm)
3420 {
3421         vdbg_printk(TPACPI_DBG_INIT, "initializing dock subdriver\n");
3422
3423         IBM_ACPIHANDLE_INIT(dock);
3424
3425         vdbg_printk(TPACPI_DBG_INIT, "dock is %s\n",
3426                 str_supported(dock_handle != NULL));
3427
3428         return (dock_handle)? 0 : 1;
3429 }
3430
3431 static int __init dock_init2(struct ibm_init_struct *iibm)
3432 {
3433         int dock2_needed;
3434
3435         vdbg_printk(TPACPI_DBG_INIT, "initializing dock subdriver part 2\n");
3436
3437         if (dock_driver_data[0].flags.acpi_driver_registered &&
3438             dock_driver_data[0].flags.acpi_notify_installed) {
3439                 IBM_ACPIHANDLE_INIT(pci);
3440                 dock2_needed = (pci_handle != NULL);
3441                 vdbg_printk(TPACPI_DBG_INIT,
3442                             "dock PCI handler for the TP 570 is %s\n",
3443                             str_supported(dock2_needed));
3444         } else {
3445                 vdbg_printk(TPACPI_DBG_INIT,
3446                 "dock subdriver part 2 not required\n");
3447                 dock2_needed = 0;
3448         }
3449
3450         return (dock2_needed)? 0 : 1;
3451 }
3452
3453 static void dock_notify(struct ibm_struct *ibm, u32 event)
3454 {
3455         int docked = dock_docked();
3456         int pci = ibm->acpi->hid && ibm->acpi->device &&
3457                 acpi_match_device_ids(ibm->acpi->device, ibm_pci_device_ids);
3458         int data;
3459
3460         if (event == 1 && !pci) /* 570 */
3461                 data = 1;       /* button */
3462         else if (event == 1 && pci)     /* 570 */
3463                 data = 3;       /* dock */
3464         else if (event == 3 && docked)
3465                 data = 1;       /* button */
3466         else if (event == 3 && !docked)
3467                 data = 2;       /* undock */
3468         else if (event == 0 && docked)
3469                 data = 3;       /* dock */
3470         else {
3471                 printk(IBM_ERR "unknown dock event %d, status %d\n",
3472                        event, _sta(dock_handle));
3473                 data = 0;       /* unknown */
3474         }
3475         acpi_bus_generate_proc_event(ibm->acpi->device, event, data);
3476         acpi_bus_generate_netlink_event(ibm->acpi->device->pnp.device_class,
3477                                           ibm->acpi->device->dev.bus_id,
3478                                           event, data);
3479 }
3480
3481 static int dock_read(char *p)
3482 {
3483         int len = 0;
3484         int docked = dock_docked();
3485
3486         if (!dock_handle)
3487                 len += sprintf(p + len, "status:\t\tnot supported\n");
3488         else if (!docked)
3489                 len += sprintf(p + len, "status:\t\tundocked\n");
3490         else {
3491                 len += sprintf(p + len, "status:\t\tdocked\n");
3492                 len += sprintf(p + len, "commands:\tdock, undock\n");
3493         }
3494
3495         return len;
3496 }
3497
3498 static int dock_write(char *buf)
3499 {
3500         char *cmd;
3501
3502         if (!dock_docked())
3503                 return -ENODEV;
3504
3505         while ((cmd = next_cmd(&buf))) {
3506                 if (strlencmp(cmd, "undock") == 0) {
3507                         if (!acpi_evalf(dock_handle, NULL, "_DCK", "vd", 0) ||
3508                             !acpi_evalf(dock_handle, NULL, "_EJ0", "vd", 1))
3509                                 return -EIO;
3510                 } else if (strlencmp(cmd, "dock") == 0) {
3511                         if (!acpi_evalf(dock_handle, NULL, "_DCK", "vd", 1))
3512                                 return -EIO;
3513                 } else
3514                         return -EINVAL;
3515         }
3516
3517         return 0;
3518 }
3519
3520 #endif /* CONFIG_THINKPAD_ACPI_DOCK */
3521
3522 /*************************************************************************
3523  * Bay subdriver
3524  */
3525
3526 #ifdef CONFIG_THINKPAD_ACPI_BAY
3527 IBM_HANDLE(bay, root, "\\_SB.PCI.IDE.SECN.MAST",        /* 570 */
3528            "\\_SB.PCI0.IDE0.IDES.IDSM", /* 600e/x, 770e, 770x */
3529            "\\_SB.PCI0.SATA.SCND.MSTR", /* T60, X60, Z60 */
3530            "\\_SB.PCI0.IDE0.SCND.MSTR", /* all others */
3531            );                           /* A21e, R30, R31 */
3532 IBM_HANDLE(bay_ej, bay, "_EJ3", /* 600e/x, A2xm/p, A3x */
3533            "_EJ0",              /* all others */
3534            );                   /* 570,A21e,G4x,R30,R31,R32,R40e,R50e */
3535 IBM_HANDLE(bay2, root, "\\_SB.PCI0.IDE0.PRIM.SLAV",     /* A3x, R32 */
3536            "\\_SB.PCI0.IDE0.IDEP.IDPS", /* 600e/x, 770e, 770x */
3537            );                           /* all others */
3538 IBM_HANDLE(bay2_ej, bay2, "_EJ3",       /* 600e/x, 770e, A3x */
3539            "_EJ0",                      /* 770x */
3540            );                           /* all others */
3541
3542 static int __init bay_init(struct ibm_init_struct *iibm)
3543 {
3544         vdbg_printk(TPACPI_DBG_INIT, "initializing bay subdriver\n");
3545
3546         IBM_ACPIHANDLE_INIT(bay);
3547         if (bay_handle)
3548                 IBM_ACPIHANDLE_INIT(bay_ej);
3549         IBM_ACPIHANDLE_INIT(bay2);
3550         if (bay2_handle)
3551                 IBM_ACPIHANDLE_INIT(bay2_ej);
3552
3553         tp_features.bay_status = bay_handle &&
3554                 acpi_evalf(bay_handle, NULL, "_STA", "qv");
3555         tp_features.bay_status2 = bay2_handle &&
3556                 acpi_evalf(bay2_handle, NULL, "_STA", "qv");
3557
3558         tp_features.bay_eject = bay_handle && bay_ej_handle &&
3559                 (strlencmp(bay_ej_path, "_EJ0") == 0 || experimental);
3560         tp_features.bay_eject2 = bay2_handle && bay2_ej_handle &&
3561                 (strlencmp(bay2_ej_path, "_EJ0") == 0 || experimental);
3562
3563         vdbg_printk(TPACPI_DBG_INIT,
3564                 "bay 1: status %s, eject %s; bay 2: status %s, eject %s\n",
3565                 str_supported(tp_features.bay_status),
3566                 str_supported(tp_features.bay_eject),
3567                 str_supported(tp_features.bay_status2),
3568                 str_supported(tp_features.bay_eject2));
3569
3570         return (tp_features.bay_status || tp_features.bay_eject ||
3571                 tp_features.bay_status2 || tp_features.bay_eject2)? 0 : 1;
3572 }
3573
3574 static void bay_notify(struct ibm_struct *ibm, u32 event)
3575 {
3576         acpi_bus_generate_proc_event(ibm->acpi->device, event, 0);
3577         acpi_bus_generate_netlink_event(ibm->acpi->device->pnp.device_class,
3578                                           ibm->acpi->device->dev.bus_id,
3579                                           event, 0);
3580 }
3581
3582 #define bay_occupied(b) (_sta(b##_handle) & 1)
3583
3584 static int bay_read(char *p)
3585 {
3586         int len = 0;
3587         int occupied = bay_occupied(bay);
3588         int occupied2 = bay_occupied(bay2);
3589         int eject, eject2;
3590
3591         len += sprintf(p + len, "status:\t\t%s\n",
3592                 tp_features.bay_status ?
3593                         (occupied ? "occupied" : "unoccupied") :
3594                                 "not supported");
3595         if (tp_features.bay_status2)
3596                 len += sprintf(p + len, "status2:\t%s\n", occupied2 ?
3597                                "occupied" : "unoccupied");
3598
3599         eject = tp_features.bay_eject && occupied;
3600         eject2 = tp_features.bay_eject2 && occupied2;
3601
3602         if (eject && eject2)
3603                 len += sprintf(p + len, "commands:\teject, eject2\n");
3604         else if (eject)
3605                 len += sprintf(p + len, "commands:\teject\n");
3606         else if (eject2)
3607                 len += sprintf(p + len, "commands:\teject2\n");
3608
3609         return len;
3610 }
3611
3612 static int bay_write(char *buf)
3613 {
3614         char *cmd;
3615
3616         if (!tp_features.bay_eject && !tp_features.bay_eject2)
3617                 return -ENODEV;
3618
3619         while ((cmd = next_cmd(&buf))) {
3620                 if (tp_features.bay_eject && strlencmp(cmd, "eject") == 0) {
3621                         if (!acpi_evalf(bay_ej_handle, NULL, NULL, "vd", 1))
3622                                 return -EIO;
3623                 } else if (tp_features.bay_eject2 &&
3624                            strlencmp(cmd, "eject2") == 0) {
3625                         if (!acpi_evalf(bay2_ej_handle, NULL, NULL, "vd", 1))
3626                                 return -EIO;
3627                 } else
3628                         return -EINVAL;
3629         }
3630
3631         return 0;
3632 }
3633
3634 static struct tp_acpi_drv_struct ibm_bay_acpidriver = {
3635         .notify = bay_notify,
3636         .handle = &bay_handle,
3637         .type = ACPI_SYSTEM_NOTIFY,
3638 };
3639
3640 static struct ibm_struct bay_driver_data = {
3641         .name = "bay",
3642         .read = bay_read,
3643         .write = bay_write,
3644         .acpi = &ibm_bay_acpidriver,
3645 };
3646
3647 #endif /* CONFIG_THINKPAD_ACPI_BAY */
3648
3649 /*************************************************************************
3650  * CMOS subdriver
3651  */
3652
3653 /* sysfs cmos_command -------------------------------------------------- */
3654 static ssize_t cmos_command_store(struct device *dev,
3655                             struct device_attribute *attr,
3656                             const char *buf, size_t count)
3657 {
3658         unsigned long cmos_cmd;
3659         int res;
3660
3661         if (parse_strtoul(buf, 21, &cmos_cmd))
3662                 return -EINVAL;
3663
3664         res = issue_thinkpad_cmos_command(cmos_cmd);
3665         return (res)? res : count;
3666 }
3667
3668 static struct device_attribute dev_attr_cmos_command =
3669         __ATTR(cmos_command, S_IWUSR, NULL, cmos_command_store);
3670
3671 /* --------------------------------------------------------------------- */
3672
3673 static int __init cmos_init(struct ibm_init_struct *iibm)
3674 {
3675         int res;
3676
3677         vdbg_printk(TPACPI_DBG_INIT,
3678                 "initializing cmos commands subdriver\n");
3679
3680         IBM_ACPIHANDLE_INIT(cmos);
3681
3682         vdbg_printk(TPACPI_DBG_INIT, "cmos commands are %s\n",
3683                 str_supported(cmos_handle != NULL));
3684
3685         res = device_create_file(&tpacpi_pdev->dev, &dev_attr_cmos_command);
3686         if (res)
3687                 return res;
3688
3689         return (cmos_handle)? 0 : 1;
3690 }
3691
3692 static void cmos_exit(void)
3693 {
3694         device_remove_file(&tpacpi_pdev->dev, &dev_attr_cmos_command);
3695 }
3696
3697 static int cmos_read(char *p)
3698 {
3699         int len = 0;
3700
3701         /* cmos not supported on 570, 600e/x, 770e, 770x, A21e, A2xm/p,
3702            R30, R31, T20-22, X20-21 */
3703         if (!cmos_handle)
3704                 len += sprintf(p + len, "status:\t\tnot supported\n");
3705         else {
3706                 len += sprintf(p + len, "status:\t\tsupported\n");
3707                 len += sprintf(p + len, "commands:\t<cmd> (<cmd> is 0-21)\n");
3708         }
3709
3710         return len;
3711 }
3712
3713 static int cmos_write(char *buf)
3714 {
3715         char *cmd;
3716         int cmos_cmd, res;
3717
3718         while ((cmd = next_cmd(&buf))) {
3719                 if (sscanf(cmd, "%u", &cmos_cmd) == 1 &&
3720                     cmos_cmd >= 0 && cmos_cmd <= 21) {
3721                         /* cmos_cmd set */
3722                 } else
3723                         return -EINVAL;
3724
3725                 res = issue_thinkpad_cmos_command(cmos_cmd);
3726                 if (res)
3727                         return res;
3728         }
3729
3730         return 0;
3731 }
3732
3733 static struct ibm_struct cmos_driver_data = {
3734         .name = "cmos",
3735         .read = cmos_read,
3736         .write = cmos_write,
3737         .exit = cmos_exit,
3738 };
3739
3740 /*************************************************************************
3741  * LED subdriver
3742  */
3743
3744 static enum led_access_mode led_supported;
3745
3746 IBM_HANDLE(led, ec, "SLED",     /* 570 */
3747            "SYSL",              /* 600e/x, 770e, 770x, A21e, A2xm/p, T20-22, X20-21 */
3748            "LED",               /* all others */
3749            );                   /* R30, R31 */
3750
3751 static int __init led_init(struct ibm_init_struct *iibm)
3752 {
3753         vdbg_printk(TPACPI_DBG_INIT, "initializing LED subdriver\n");
3754
3755         IBM_ACPIHANDLE_INIT(led);
3756
3757         if (!led_handle)
3758                 /* led not supported on R30, R31 */
3759                 led_supported = TPACPI_LED_NONE;
3760         else if (strlencmp(led_path, "SLED") == 0)
3761                 /* 570 */
3762                 led_supported = TPACPI_LED_570;
3763         else if (strlencmp(led_path, "SYSL") == 0)
3764                 /* 600e/x, 770e, 770x, A21e, A2xm/p, T20-22, X20-21 */
3765                 led_supported = TPACPI_LED_OLD;
3766         else
3767                 /* all others */
3768                 led_supported = TPACPI_LED_NEW;
3769
3770         vdbg_printk(TPACPI_DBG_INIT, "LED commands are %s, mode %d\n",
3771                 str_supported(led_supported), led_supported);
3772
3773         return (led_supported != TPACPI_LED_NONE)? 0 : 1;
3774 }
3775
3776 #define led_status(s) ((s) == 0 ? "off" : ((s) == 1 ? "on" : "blinking"))
3777
3778 static int led_read(char *p)
3779 {
3780         int len = 0;
3781
3782         if (!led_supported) {
3783                 len += sprintf(p + len, "status:\t\tnot supported\n");
3784                 return len;
3785         }
3786         len += sprintf(p + len, "status:\t\tsupported\n");
3787
3788         if (led_supported == TPACPI_LED_570) {
3789                 /* 570 */
3790                 int i, status;
3791                 for (i = 0; i < 8; i++) {
3792                         if (!acpi_evalf(ec_handle,
3793                                         &status, "GLED", "dd", 1 << i))
3794                                 return -EIO;
3795                         len += sprintf(p + len, "%d:\t\t%s\n",
3796                                        i, led_status(status));
3797                 }
3798         }
3799
3800         len += sprintf(p + len, "commands:\t"
3801                        "<led> on, <led> off, <led> blink (<led> is 0-7)\n");
3802
3803         return len;
3804 }
3805
3806 /* off, on, blink */
3807 static const int led_sled_arg1[] = { 0, 1, 3 };
3808 static const int led_exp_hlbl[] = { 0, 0, 1 };  /* led# * */
3809 static const int led_exp_hlcl[] = { 0, 1, 1 };  /* led# * */
3810 static const int led_led_arg1[] = { 0, 0x80, 0xc0 };
3811
3812 static int led_write(char *buf)
3813 {
3814         char *cmd;
3815         int led, ind, ret;
3816
3817         if (!led_supported)
3818                 return -ENODEV;
3819
3820         while ((cmd = next_cmd(&buf))) {
3821                 if (sscanf(cmd, "%d", &led) != 1 || led < 0 || led > 7)
3822                         return -EINVAL;
3823
3824                 if (strstr(cmd, "off")) {
3825                         ind = 0;
3826                 } else if (strstr(cmd, "on")) {
3827                         ind = 1;
3828                 } else if (strstr(cmd, "blink")) {
3829                         ind = 2;
3830                 } else
3831                         return -EINVAL;
3832
3833                 if (led_supported == TPACPI_LED_570) {
3834                         /* 570 */
3835                         led = 1 << led;
3836                         if (!acpi_evalf(led_handle, NULL, NULL, "vdd",
3837                                         led, led_sled_arg1[ind]))
3838                                 return -EIO;
3839                 } else if (led_supported == TPACPI_LED_OLD) {
3840                         /* 600e/x, 770e, 770x, A21e, A2xm/p, T20-22, X20 */
3841                         led = 1 << led;
3842                         ret = ec_write(TPACPI_LED_EC_HLMS, led);
3843                         if (ret >= 0)
3844                                 ret =
3845                                     ec_write(TPACPI_LED_EC_HLBL,
3846                                              led * led_exp_hlbl[ind]);
3847                         if (ret >= 0)
3848                                 ret =
3849                                     ec_write(TPACPI_LED_EC_HLCL,
3850                                              led * led_exp_hlcl[ind]);
3851                         if (ret < 0)
3852                                 return ret;
3853                 } else {
3854                         /* all others */
3855                         if (!acpi_evalf(led_handle, NULL, NULL, "vdd",
3856                                         led, led_led_arg1[ind]))
3857                                 return -EIO;
3858                 }
3859         }
3860
3861         return 0;
3862 }
3863
3864 static struct ibm_struct led_driver_data = {
3865         .name = "led",
3866         .read = led_read,
3867         .write = led_write,
3868 };
3869
3870 /*************************************************************************
3871  * Beep subdriver
3872  */
3873
3874 IBM_HANDLE(beep, ec, "BEEP");   /* all except R30, R31 */
3875
3876 static int __init beep_init(struct ibm_init_struct *iibm)
3877 {
3878         vdbg_printk(TPACPI_DBG_INIT, "initializing beep subdriver\n");
3879
3880         IBM_ACPIHANDLE_INIT(beep);
3881
3882         vdbg_printk(TPACPI_DBG_INIT, "beep is %s\n",
3883                 str_supported(beep_handle != NULL));
3884
3885         return (beep_handle)? 0 : 1;
3886 }
3887
3888 static int beep_read(char *p)
3889 {
3890         int len = 0;
3891
3892         if (!beep_handle)
3893                 len += sprintf(p + len, "status:\t\tnot supported\n");
3894         else {
3895                 len += sprintf(p + len, "status:\t\tsupported\n");
3896                 len += sprintf(p + len, "commands:\t<cmd> (<cmd> is 0-17)\n");
3897         }
3898
3899         return len;
3900 }
3901
3902 static int beep_write(char *buf)
3903 {
3904         char *cmd;
3905         int beep_cmd;
3906
3907         if (!beep_handle)
3908                 return -ENODEV;
3909
3910         while ((cmd = next_cmd(&buf))) {
3911                 if (sscanf(cmd, "%u", &beep_cmd) == 1 &&
3912                     beep_cmd >= 0 && beep_cmd <= 17) {
3913                         /* beep_cmd set */
3914                 } else
3915                         return -EINVAL;
3916                 if (!acpi_evalf(beep_handle, NULL, NULL, "vdd", beep_cmd, 0))
3917                         return -EIO;
3918         }
3919
3920         return 0;
3921 }
3922
3923 static struct ibm_struct beep_driver_data = {
3924         .name = "beep",
3925         .read = beep_read,
3926         .write = beep_write,
3927 };
3928
3929 /*************************************************************************
3930  * Thermal subdriver
3931  */
3932
3933 static enum thermal_access_mode thermal_read_mode;
3934
3935 /* sysfs temp##_input -------------------------------------------------- */
3936
3937 static ssize_t thermal_temp_input_show(struct device *dev,
3938                            struct device_attribute *attr,
3939                            char *buf)
3940 {
3941         struct sensor_device_attribute *sensor_attr =
3942                                         to_sensor_dev_attr(attr);
3943         int idx = sensor_attr->index;
3944         s32 value;
3945         int res;
3946
3947         res = thermal_get_sensor(idx, &value);
3948         if (res)
3949                 return res;
3950         if (value == TP_EC_THERMAL_TMP_NA * 1000)
3951                 return -ENXIO;
3952
3953         return snprintf(buf, PAGE_SIZE, "%d\n", value);
3954 }
3955
3956 #define THERMAL_SENSOR_ATTR_TEMP(_idxA, _idxB) \
3957          SENSOR_ATTR(temp##_idxA##_input, S_IRUGO, thermal_temp_input_show, NULL, _idxB)
3958
3959 static struct sensor_device_attribute sensor_dev_attr_thermal_temp_input[] = {
3960         THERMAL_SENSOR_ATTR_TEMP(1, 0),
3961         THERMAL_SENSOR_ATTR_TEMP(2, 1),
3962         THERMAL_SENSOR_ATTR_TEMP(3, 2),
3963         THERMAL_SENSOR_ATTR_TEMP(4, 3),
3964         THERMAL_SENSOR_ATTR_TEMP(5, 4),
3965         THERMAL_SENSOR_ATTR_TEMP(6, 5),
3966         THERMAL_SENSOR_ATTR_TEMP(7, 6),
3967         THERMAL_SENSOR_ATTR_TEMP(8, 7),
3968         THERMAL_SENSOR_ATTR_TEMP(9, 8),
3969         THERMAL_SENSOR_ATTR_TEMP(10, 9),
3970         THERMAL_SENSOR_ATTR_TEMP(11, 10),
3971         THERMAL_SENSOR_ATTR_TEMP(12, 11),
3972         THERMAL_SENSOR_ATTR_TEMP(13, 12),
3973         THERMAL_SENSOR_ATTR_TEMP(14, 13),
3974         THERMAL_SENSOR_ATTR_TEMP(15, 14),
3975         THERMAL_SENSOR_ATTR_TEMP(16, 15),
3976 };
3977
3978 #define THERMAL_ATTRS(X) \
3979         &sensor_dev_attr_thermal_temp_input[X].dev_attr.attr
3980
3981 static struct attribute *thermal_temp_input_attr[] = {
3982         THERMAL_ATTRS(8),
3983         THERMAL_ATTRS(9),
3984         THERMAL_ATTRS(10),
3985         THERMAL_ATTRS(11),
3986         THERMAL_ATTRS(12),
3987         THERMAL_ATTRS(13),
3988         THERMAL_ATTRS(14),
3989         THERMAL_ATTRS(15),
3990         THERMAL_ATTRS(0),
3991         THERMAL_ATTRS(1),
3992         THERMAL_ATTRS(2),
3993         THERMAL_ATTRS(3),
3994         THERMAL_ATTRS(4),
3995         THERMAL_ATTRS(5),
3996         THERMAL_ATTRS(6),
3997         THERMAL_ATTRS(7),
3998         NULL
3999 };
4000
4001 static const struct attribute_group thermal_temp_input16_group = {
4002         .attrs = thermal_temp_input_attr
4003 };
4004
4005 static const struct attribute_group thermal_temp_input8_group = {
4006         .attrs = &thermal_temp_input_attr[8]
4007 };
4008
4009 #undef THERMAL_SENSOR_ATTR_TEMP
4010 #undef THERMAL_ATTRS
4011
4012 /* --------------------------------------------------------------------- */
4013
4014 static int __init thermal_init(struct ibm_init_struct *iibm)
4015 {
4016         u8 t, ta1, ta2;
4017         int i;
4018         int acpi_tmp7;
4019         int res;
4020
4021         vdbg_printk(TPACPI_DBG_INIT, "initializing thermal subdriver\n");
4022
4023         acpi_tmp7 = acpi_evalf(ec_handle, NULL, "TMP7", "qv");
4024
4025         if (thinkpad_id.ec_model) {
4026                 /*
4027                  * Direct EC access mode: sensors at registers
4028                  * 0x78-0x7F, 0xC0-0xC7.  Registers return 0x00 for
4029                  * non-implemented, thermal sensors return 0x80 when
4030                  * not available
4031                  */
4032
4033                 ta1 = ta2 = 0;
4034                 for (i = 0; i < 8; i++) {
4035                         if (acpi_ec_read(TP_EC_THERMAL_TMP0 + i, &t)) {
4036                                 ta1 |= t;
4037                         } else {
4038                                 ta1 = 0;
4039                                 break;
4040                         }
4041                         if (acpi_ec_read(TP_EC_THERMAL_TMP8 + i, &t)) {
4042                                 ta2 |= t;
4043                         } else {
4044                                 ta1 = 0;
4045                                 break;
4046                         }
4047                 }
4048                 if (ta1 == 0) {
4049                         /* This is sheer paranoia, but we handle it anyway */
4050                         if (acpi_tmp7) {
4051                                 printk(IBM_ERR
4052                                        "ThinkPad ACPI EC access misbehaving, "
4053                                        "falling back to ACPI TMPx access mode\n");
4054                                 thermal_read_mode = TPACPI_THERMAL_ACPI_TMP07;
4055                         } else {
4056                                 printk(IBM_ERR
4057                                        "ThinkPad ACPI EC access misbehaving, "
4058                                        "disabling thermal sensors access\n");
4059                                 thermal_read_mode = TPACPI_THERMAL_NONE;
4060                         }
4061                 } else {
4062                         thermal_read_mode =
4063                             (ta2 != 0) ?
4064                             TPACPI_THERMAL_TPEC_16 : TPACPI_THERMAL_TPEC_8;
4065                 }
4066         } else if (acpi_tmp7) {
4067                 if (acpi_evalf(ec_handle, NULL, "UPDT", "qv")) {
4068                         /* 600e/x, 770e, 770x */
4069                         thermal_read_mode = TPACPI_THERMAL_ACPI_UPDT;
4070                 } else {
4071                         /* Standard ACPI TMPx access, max 8 sensors */
4072                         thermal_read_mode = TPACPI_THERMAL_ACPI_TMP07;
4073                 }
4074         } else {
4075                 /* temperatures not supported on 570, G4x, R30, R31, R32 */
4076                 thermal_read_mode = TPACPI_THERMAL_NONE;
4077         }
4078
4079         vdbg_printk(TPACPI_DBG_INIT, "thermal is %s, mode %d\n",
4080                 str_supported(thermal_read_mode != TPACPI_THERMAL_NONE),
4081                 thermal_read_mode);
4082
4083         switch(thermal_read_mode) {
4084         case TPACPI_THERMAL_TPEC_16:
4085                 res = sysfs_create_group(&tpacpi_sensors_pdev->dev.kobj,
4086                                 &thermal_temp_input16_group);
4087                 if (res)
4088                         return res;
4089                 break;
4090         case TPACPI_THERMAL_TPEC_8:
4091         case TPACPI_THERMAL_ACPI_TMP07:
4092         case TPACPI_THERMAL_ACPI_UPDT:
4093                 res = sysfs_create_group(&tpacpi_sensors_pdev->dev.kobj,
4094                                 &thermal_temp_input8_group);
4095                 if (res)
4096                         return res;
4097                 break;
4098         case TPACPI_THERMAL_NONE:
4099         default:
4100                 return 1;
4101         }
4102
4103         return 0;
4104 }
4105
4106 static void thermal_exit(void)
4107 {
4108         switch(thermal_read_mode) {
4109         case TPACPI_THERMAL_TPEC_16:
4110                 sysfs_remove_group(&tpacpi_sensors_pdev->dev.kobj,
4111                                    &thermal_temp_input16_group);
4112                 break;
4113         case TPACPI_THERMAL_TPEC_8:
4114         case TPACPI_THERMAL_ACPI_TMP07:
4115         case TPACPI_THERMAL_ACPI_UPDT:
4116                 sysfs_remove_group(&tpacpi_sensors_pdev->dev.kobj,
4117                                    &thermal_temp_input16_group);
4118                 break;
4119         case TPACPI_THERMAL_NONE:
4120         default:
4121                 break;
4122         }
4123 }
4124
4125 /* idx is zero-based */
4126 static int thermal_get_sensor(int idx, s32 *value)
4127 {
4128         int t;
4129         s8 tmp;
4130         char tmpi[5];
4131
4132         t = TP_EC_THERMAL_TMP0;
4133
4134         switch (thermal_read_mode) {
4135 #if TPACPI_MAX_THERMAL_SENSORS >= 16
4136         case TPACPI_THERMAL_TPEC_16:
4137                 if (idx >= 8 && idx <= 15) {
4138                         t = TP_EC_THERMAL_TMP8;
4139                         idx -= 8;
4140                 }
4141                 /* fallthrough */
4142 #endif
4143         case TPACPI_THERMAL_TPEC_8:
4144                 if (idx <= 7) {
4145                         if (!acpi_ec_read(t + idx, &tmp))
4146                                 return -EIO;
4147                         *value = tmp * 1000;
4148                         return 0;
4149                 }
4150                 break;
4151
4152         case TPACPI_THERMAL_ACPI_UPDT:
4153                 if (idx <= 7) {
4154                         snprintf(tmpi, sizeof(tmpi), "TMP%c", '0' + idx);
4155                         if (!acpi_evalf(ec_handle, NULL, "UPDT", "v"))
4156                                 return -EIO;
4157                         if (!acpi_evalf(ec_handle, &t, tmpi, "d"))
4158                                 return -EIO;
4159                         *value = (t - 2732) * 100;
4160                         return 0;
4161                 }
4162                 break;
4163
4164         case TPACPI_THERMAL_ACPI_TMP07:
4165                 if (idx <= 7) {
4166                         snprintf(tmpi, sizeof(tmpi), "TMP%c", '0' + idx);
4167                         if (!acpi_evalf(ec_handle, &t, tmpi, "d"))
4168                                 return -EIO;
4169                         if (t > 127 || t < -127)
4170                                 t = TP_EC_THERMAL_TMP_NA;
4171                         *value = t * 1000;
4172                         return 0;
4173                 }
4174                 break;
4175
4176         case TPACPI_THERMAL_NONE:
4177         default:
4178                 return -ENOSYS;
4179         }
4180
4181         return -EINVAL;
4182 }
4183
4184 static int thermal_get_sensors(struct ibm_thermal_sensors_struct *s)
4185 {
4186         int res, i;
4187         int n;
4188
4189         n = 8;
4190         i = 0;
4191
4192         if (!s)
4193                 return -EINVAL;
4194
4195         if (thermal_read_mode == TPACPI_THERMAL_TPEC_16)
4196                 n = 16;
4197
4198         for(i = 0 ; i < n; i++) {
4199                 res = thermal_get_sensor(i, &s->temp[i]);
4200                 if (res)
4201                         return res;
4202         }
4203
4204         return n;
4205 }
4206
4207 static int thermal_read(char *p)
4208 {
4209         int len = 0;
4210         int n, i;
4211         struct ibm_thermal_sensors_struct t;
4212
4213         n = thermal_get_sensors(&t);
4214         if (unlikely(n < 0))
4215                 return n;
4216
4217         len += sprintf(p + len, "temperatures:\t");
4218
4219         if (n > 0) {
4220                 for (i = 0; i < (n - 1); i++)
4221                         len += sprintf(p + len, "%d ", t.temp[i] / 1000);
4222                 len += sprintf(p + len, "%d\n", t.temp[i] / 1000);
4223         } else
4224                 len += sprintf(p + len, "not supported\n");
4225
4226         return len;
4227 }
4228
4229 static struct ibm_struct thermal_driver_data = {
4230         .name = "thermal",
4231         .read = thermal_read,
4232         .exit = thermal_exit,
4233 };
4234
4235 /*************************************************************************
4236  * EC Dump subdriver
4237  */
4238
4239 static u8 ecdump_regs[256];
4240
4241 static int ecdump_read(char *p)
4242 {
4243         int len = 0;
4244         int i, j;
4245         u8 v;
4246
4247         len += sprintf(p + len, "EC      "
4248                        " +00 +01 +02 +03 +04 +05 +06 +07"
4249                        " +08 +09 +0a +0b +0c +0d +0e +0f\n");
4250         for (i = 0; i < 256; i += 16) {
4251                 len += sprintf(p + len, "EC 0x%02x:", i);
4252                 for (j = 0; j < 16; j++) {
4253                         if (!acpi_ec_read(i + j, &v))
4254                                 break;
4255                         if (v != ecdump_regs[i + j])
4256                                 len += sprintf(p + len, " *%02x", v);
4257                         else
4258                                 len += sprintf(p + len, "  %02x", v);
4259                         ecdump_regs[i + j] = v;
4260                 }
4261                 len += sprintf(p + len, "\n");
4262                 if (j != 16)
4263                         break;
4264         }
4265
4266         /* These are way too dangerous to advertise openly... */
4267 #if 0
4268         len += sprintf(p + len, "commands:\t0x<offset> 0x<value>"
4269                        " (<offset> is 00-ff, <value> is 00-ff)\n");
4270         len += sprintf(p + len, "commands:\t0x<offset> <value>  "
4271                        " (<offset> is 00-ff, <value> is 0-255)\n");
4272 #endif
4273         return len;
4274 }
4275
4276 static int ecdump_write(char *buf)
4277 {
4278         char *cmd;
4279         int i, v;
4280
4281         while ((cmd = next_cmd(&buf))) {
4282                 if (sscanf(cmd, "0x%x 0x%x", &i, &v) == 2) {
4283                         /* i and v set */
4284                 } else if (sscanf(cmd, "0x%x %u", &i, &v) == 2) {
4285                         /* i and v set */
4286                 } else
4287                         return -EINVAL;
4288                 if (i >= 0 && i < 256 && v >= 0 && v < 256) {
4289                         if (!acpi_ec_write(i, v))
4290                                 return -EIO;
4291                 } else
4292                         return -EINVAL;
4293         }
4294
4295         return 0;
4296 }
4297
4298 static struct ibm_struct ecdump_driver_data = {
4299         .name = "ecdump",
4300         .read = ecdump_read,
4301         .write = ecdump_write,
4302         .flags.experimental = 1,
4303 };
4304
4305 /*************************************************************************
4306  * Backlight/brightness subdriver
4307  */
4308
4309 static struct backlight_device *ibm_backlight_device;
4310
4311 static struct backlight_ops ibm_backlight_data = {
4312         .get_brightness = brightness_get,
4313         .update_status  = brightness_update_status,
4314 };
4315
4316 static struct mutex brightness_mutex;
4317
4318 static int __init tpacpi_query_bcll_levels(acpi_handle handle)
4319 {
4320         struct acpi_buffer buffer = { ACPI_ALLOCATE_BUFFER, NULL };
4321         union acpi_object *obj;
4322         int rc;
4323
4324         if (ACPI_SUCCESS(acpi_evaluate_object(handle, NULL, NULL, &buffer))) {
4325                 obj = (union acpi_object *)buffer.pointer;
4326                 if (!obj || (obj->type != ACPI_TYPE_PACKAGE)) {
4327                         printk(IBM_ERR "Unknown BCLL data, "
4328                                "please report this to %s\n", IBM_MAIL);
4329                         rc = 0;
4330                 } else {
4331                         rc = obj->package.count;
4332                 }
4333         } else {
4334                 return 0;
4335         }
4336
4337         kfree(buffer.pointer);
4338         return rc;
4339 }
4340
4341 static acpi_status __init brightness_find_bcll(acpi_handle handle, u32 lvl,
4342                                         void *context, void **rv)
4343 {
4344         char name[ACPI_PATH_SEGMENT_LENGTH];
4345         struct acpi_buffer buffer = { sizeof(name), &name };
4346
4347         if (ACPI_SUCCESS(acpi_get_name(handle, ACPI_SINGLE_NAME, &buffer)) &&
4348             !strncmp("BCLL", name, sizeof(name) - 1)) {
4349                 if (tpacpi_query_bcll_levels(handle) == 16) {
4350                         *rv = handle;
4351                         return AE_CTRL_TERMINATE;
4352                 } else {
4353                         return AE_OK;
4354                 }
4355         } else {
4356                 return AE_OK;
4357         }
4358 }
4359
4360 static int __init brightness_check_levels(void)
4361 {
4362         int status;
4363         void *found_node = NULL;
4364
4365         if (!vid_handle) {
4366                 IBM_ACPIHANDLE_INIT(vid);
4367         }
4368         if (!vid_handle)
4369                 return 0;
4370
4371         /* Search for a BCLL package with 16 levels */
4372         status = acpi_walk_namespace(ACPI_TYPE_PACKAGE, vid_handle, 3,
4373                                         brightness_find_bcll, NULL, &found_node);
4374
4375         return (ACPI_SUCCESS(status) && found_node != NULL);
4376 }
4377
4378 static acpi_status __init brightness_find_bcl(acpi_handle handle, u32 lvl,
4379                                         void *context, void **rv)
4380 {
4381         char name[ACPI_PATH_SEGMENT_LENGTH];
4382         struct acpi_buffer buffer = { sizeof(name), &name };
4383
4384         if (ACPI_SUCCESS(acpi_get_name(handle, ACPI_SINGLE_NAME, &buffer)) &&
4385             !strncmp("_BCL", name, sizeof(name) - 1)) {
4386                 *rv = handle;
4387                 return AE_CTRL_TERMINATE;
4388         } else {
4389                 return AE_OK;
4390         }
4391 }
4392
4393 static int __init brightness_check_std_acpi_support(void)
4394 {
4395         int status;
4396         void *found_node = NULL;
4397
4398         if (!vid_handle) {
4399                 IBM_ACPIHANDLE_INIT(vid);
4400         }
4401         if (!vid_handle)
4402                 return 0;
4403
4404         /* Search for a _BCL method, but don't execute it */
4405         status = acpi_walk_namespace(ACPI_TYPE_METHOD, vid_handle, 3,
4406                                      brightness_find_bcl, NULL, &found_node);
4407
4408         return (ACPI_SUCCESS(status) && found_node != NULL);
4409 }
4410
4411 static int __init brightness_init(struct ibm_init_struct *iibm)
4412 {
4413         int b;
4414
4415         vdbg_printk(TPACPI_DBG_INIT, "initializing brightness subdriver\n");
4416
4417         mutex_init(&brightness_mutex);
4418
4419         if (!brightness_enable) {
4420                 dbg_printk(TPACPI_DBG_INIT,
4421                            "brightness support disabled by module parameter\n");
4422                 return 1;
4423         } else if (brightness_enable > 1) {
4424                 if (brightness_check_std_acpi_support()) {
4425                         printk(IBM_NOTICE
4426                                "standard ACPI backlight interface available, not loading native one...\n");
4427                         return 1;
4428                 }
4429         }
4430
4431         if (!brightness_mode) {
4432                 if (thinkpad_id.vendor == PCI_VENDOR_ID_LENOVO)
4433                         brightness_mode = 2;
4434                 else
4435                         brightness_mode = 3;
4436
4437                 dbg_printk(TPACPI_DBG_INIT, "selected brightness_mode=%d\n",
4438                         brightness_mode);
4439         }
4440
4441         if (brightness_mode > 3)
4442                 return -EINVAL;
4443
4444         tp_features.bright_16levels =
4445                         thinkpad_id.vendor == PCI_VENDOR_ID_LENOVO &&
4446                         brightness_check_levels();
4447
4448         b = brightness_get(NULL);
4449         if (b < 0)
4450                 return 1;
4451
4452         if (tp_features.bright_16levels)
4453                 printk(IBM_INFO "detected a 16-level brightness capable ThinkPad\n");
4454
4455         ibm_backlight_device = backlight_device_register(
4456                                         TPACPI_BACKLIGHT_DEV_NAME, NULL, NULL,
4457                                         &ibm_backlight_data);
4458         if (IS_ERR(ibm_backlight_device)) {
4459                 printk(IBM_ERR "Could not register backlight device\n");
4460                 return PTR_ERR(ibm_backlight_device);
4461         }
4462         vdbg_printk(TPACPI_DBG_INIT, "brightness is supported\n");
4463
4464         ibm_backlight_device->props.max_brightness =
4465                                 (tp_features.bright_16levels)? 15 : 7;
4466         ibm_backlight_device->props.brightness = b;
4467         backlight_update_status(ibm_backlight_device);
4468
4469         return 0;
4470 }
4471
4472 static void brightness_exit(void)
4473 {
4474         if (ibm_backlight_device) {
4475                 vdbg_printk(TPACPI_DBG_EXIT,
4476                             "calling backlight_device_unregister()\n");
4477                 backlight_device_unregister(ibm_backlight_device);
4478                 ibm_backlight_device = NULL;
4479         }
4480 }
4481
4482 static int brightness_update_status(struct backlight_device *bd)
4483 {
4484         /* it is the backlight class's job (caller) to handle
4485          * EINTR and other errors properly */
4486         return brightness_set(
4487                 (bd->props.fb_blank == FB_BLANK_UNBLANK &&
4488                  bd->props.power == FB_BLANK_UNBLANK) ?
4489                                 bd->props.brightness : 0);
4490 }
4491
4492 /*
4493  * ThinkPads can read brightness from two places: EC 0x31, or
4494  * CMOS NVRAM byte 0x5E, bits 0-3.
4495  */
4496 static int brightness_get(struct backlight_device *bd)
4497 {
4498         u8 lec = 0, lcmos = 0, level = 0;
4499
4500         if (brightness_mode & 1) {
4501                 if (!acpi_ec_read(brightness_offset, &lec))
4502                         return -EIO;
4503                 lec &= (tp_features.bright_16levels)? 0x0f : 0x07;
4504                 level = lec;
4505         };
4506         if (brightness_mode & 2) {
4507                 lcmos = (nvram_read_byte(TP_NVRAM_ADDR_BRIGHTNESS)
4508                          & TP_NVRAM_MASK_LEVEL_BRIGHTNESS)
4509                         >> TP_NVRAM_POS_LEVEL_BRIGHTNESS;
4510                 lcmos &= (tp_features.bright_16levels)? 0x0f : 0x07;
4511                 level = lcmos;
4512         }
4513
4514         if (brightness_mode == 3 && lec != lcmos) {
4515                 printk(IBM_ERR
4516                         "CMOS NVRAM (%u) and EC (%u) do not agree "
4517                         "on display brightness level\n",
4518                         (unsigned int) lcmos,
4519                         (unsigned int) lec);
4520                 return -EIO;
4521         }
4522
4523         return level;
4524 }
4525
4526 /* May return EINTR which can always be mapped to ERESTARTSYS */
4527 static int brightness_set(int value)
4528 {
4529         int cmos_cmd, inc, i, res;
4530         int current_value;
4531
4532         if (value > ((tp_features.bright_16levels)? 15 : 7))
4533                 return -EINVAL;
4534
4535         res = mutex_lock_interruptible(&brightness_mutex);
4536         if (res < 0)
4537                 return res;
4538
4539         current_value = brightness_get(NULL);
4540         if (current_value < 0) {
4541                 res = current_value;
4542                 goto errout;
4543         }
4544
4545         cmos_cmd = value > current_value ?
4546                         TP_CMOS_BRIGHTNESS_UP :
4547                         TP_CMOS_BRIGHTNESS_DOWN;
4548         inc = (value > current_value)? 1 : -1;
4549
4550         res = 0;
4551         for (i = current_value; i != value; i += inc) {
4552                 if ((brightness_mode & 2) &&
4553                     issue_thinkpad_cmos_command(cmos_cmd)) {
4554                         res = -EIO;
4555                         goto errout;
4556                 }
4557                 if ((brightness_mode & 1) &&
4558                     !acpi_ec_write(brightness_offset, i + inc)) {
4559                         res = -EIO;
4560                         goto errout;;
4561                 }
4562         }
4563
4564 errout:
4565         mutex_unlock(&brightness_mutex);
4566         return res;
4567 }
4568
4569 static int brightness_read(char *p)
4570 {
4571         int len = 0;
4572         int level;
4573
4574         if ((level = brightness_get(NULL)) < 0) {
4575                 len += sprintf(p + len, "level:\t\tunreadable\n");
4576         } else {
4577                 len += sprintf(p + len, "level:\t\t%d\n", level);
4578                 len += sprintf(p + len, "commands:\tup, down\n");
4579                 len += sprintf(p + len, "commands:\tlevel <level>"
4580                                " (<level> is 0-%d)\n",
4581                                (tp_features.bright_16levels) ? 15 : 7);
4582         }
4583
4584         return len;
4585 }
4586
4587 static int brightness_write(char *buf)
4588 {
4589         int level;
4590         int rc;
4591         char *cmd;
4592         int max_level = (tp_features.bright_16levels) ? 15 : 7;
4593
4594         level = brightness_get(NULL);
4595         if (level < 0)
4596                 return level;
4597
4598         while ((cmd = next_cmd(&buf))) {
4599                 if (strlencmp(cmd, "up") == 0) {
4600                         if (level < max_level)
4601                                 level++;
4602                 } else if (strlencmp(cmd, "down") == 0) {
4603                         if (level > 0)
4604                                 level--;
4605                 } else if (sscanf(cmd, "level %d", &level) == 1 &&
4606                            level >= 0 && level <= max_level) {
4607                         /* new level set */
4608                 } else
4609                         return -EINVAL;
4610         }
4611
4612         /*
4613          * Now we know what the final level should be, so we try to set it.
4614          * Doing it this way makes the syscall restartable in case of EINTR
4615          */
4616         rc = brightness_set(level);
4617         return (rc == -EINTR)? ERESTARTSYS : rc;
4618 }
4619
4620 static struct ibm_struct brightness_driver_data = {
4621         .name = "brightness",
4622         .read = brightness_read,
4623         .write = brightness_write,
4624         .exit = brightness_exit,
4625 };
4626
4627 /*************************************************************************
4628  * Volume subdriver
4629  */
4630
4631 static int volume_read(char *p)
4632 {
4633         int len = 0;
4634         u8 level;
4635
4636         if (!acpi_ec_read(volume_offset, &level)) {
4637                 len += sprintf(p + len, "level:\t\tunreadable\n");
4638         } else {
4639                 len += sprintf(p + len, "level:\t\t%d\n", level & 0xf);
4640                 len += sprintf(p + len, "mute:\t\t%s\n", onoff(level, 6));
4641                 len += sprintf(p + len, "commands:\tup, down, mute\n");
4642                 len += sprintf(p + len, "commands:\tlevel <level>"
4643                                " (<level> is 0-15)\n");
4644         }
4645
4646         return len;
4647 }
4648
4649 static int volume_write(char *buf)
4650 {
4651         int cmos_cmd, inc, i;
4652         u8 level, mute;
4653         int new_level, new_mute;
4654         char *cmd;
4655
4656         while ((cmd = next_cmd(&buf))) {
4657                 if (!acpi_ec_read(volume_offset, &level))
4658                         return -EIO;
4659                 new_mute = mute = level & 0x40;
4660                 new_level = level = level & 0xf;
4661
4662                 if (strlencmp(cmd, "up") == 0) {
4663                         if (mute)
4664                                 new_mute = 0;
4665                         else
4666                                 new_level = level == 15 ? 15 : level + 1;
4667                 } else if (strlencmp(cmd, "down") == 0) {
4668                         if (mute)
4669                                 new_mute = 0;
4670                         else
4671                                 new_level = level == 0 ? 0 : level - 1;
4672                 } else if (sscanf(cmd, "level %d", &new_level) == 1 &&
4673                            new_level >= 0 && new_level <= 15) {
4674                         /* new_level set */
4675                 } else if (strlencmp(cmd, "mute") == 0) {
4676                         new_mute = 0x40;
4677                 } else
4678                         return -EINVAL;
4679
4680                 if (new_level != level) {       /* mute doesn't change */
4681                         cmos_cmd = new_level > level ? TP_CMOS_VOLUME_UP : TP_CMOS_VOLUME_DOWN;
4682                         inc = new_level > level ? 1 : -1;
4683
4684                         if (mute && (issue_thinkpad_cmos_command(cmos_cmd) ||
4685                                      !acpi_ec_write(volume_offset, level)))
4686                                 return -EIO;
4687
4688                         for (i = level; i != new_level; i += inc)
4689                                 if (issue_thinkpad_cmos_command(cmos_cmd) ||
4690                                     !acpi_ec_write(volume_offset, i + inc))
4691                                         return -EIO;
4692
4693                         if (mute && (issue_thinkpad_cmos_command(TP_CMOS_VOLUME_MUTE) ||
4694                                      !acpi_ec_write(volume_offset,
4695                                                     new_level + mute)))
4696                                 return -EIO;
4697                 }
4698
4699                 if (new_mute != mute) { /* level doesn't change */
4700                         cmos_cmd = new_mute ? TP_CMOS_VOLUME_MUTE : TP_CMOS_VOLUME_UP;
4701
4702                         if (issue_thinkpad_cmos_command(cmos_cmd) ||
4703                             !acpi_ec_write(volume_offset, level + new_mute))
4704                                 return -EIO;
4705                 }
4706         }
4707
4708         return 0;
4709 }
4710
4711 static struct ibm_struct volume_driver_data = {
4712         .name = "volume",
4713         .read = volume_read,
4714         .write = volume_write,
4715 };
4716
4717 /*************************************************************************
4718  * Fan subdriver
4719  */
4720
4721 /*
4722  * FAN ACCESS MODES
4723  *
4724  * TPACPI_FAN_RD_ACPI_GFAN:
4725  *      ACPI GFAN method: returns fan level
4726  *
4727  *      see TPACPI_FAN_WR_ACPI_SFAN
4728  *      EC 0x2f (HFSP) not available if GFAN exists
4729  *
4730  * TPACPI_FAN_WR_ACPI_SFAN:
4731  *      ACPI SFAN method: sets fan level, 0 (stop) to 7 (max)
4732  *
4733  *      EC 0x2f (HFSP) might be available *for reading*, but do not use
4734  *      it for writing.
4735  *
4736  * TPACPI_FAN_WR_TPEC:
4737  *      ThinkPad EC register 0x2f (HFSP): fan control loop mode
4738  *      Supported on almost all ThinkPads
4739  *
4740  *      Fan speed changes of any sort (including those caused by the
4741  *      disengaged mode) are usually done slowly by the firmware as the
4742  *      maximum ammount of fan duty cycle change per second seems to be
4743  *      limited.
4744  *
4745  *      Reading is not available if GFAN exists.
4746  *      Writing is not available if SFAN exists.
4747  *
4748  *      Bits
4749  *       7      automatic mode engaged;
4750  *              (default operation mode of the ThinkPad)
4751  *              fan level is ignored in this mode.
4752  *       6      full speed mode (takes precedence over bit 7);
4753  *              not available on all thinkpads.  May disable
4754  *              the tachometer while the fan controller ramps up
4755  *              the speed (which can take up to a few *minutes*).
4756  *              Speeds up fan to 100% duty-cycle, which is far above
4757  *              the standard RPM levels.  It is not impossible that
4758  *              it could cause hardware damage.
4759  *      5-3     unused in some models.  Extra bits for fan level
4760  *              in others, but still useless as all values above
4761  *              7 map to the same speed as level 7 in these models.
4762  *      2-0     fan level (0..7 usually)
4763  *                      0x00 = stop
4764  *                      0x07 = max (set when temperatures critical)
4765  *              Some ThinkPads may have other levels, see
4766  *              TPACPI_FAN_WR_ACPI_FANS (X31/X40/X41)
4767  *
4768  *      FIRMWARE BUG: on some models, EC 0x2f might not be initialized at
4769  *      boot. Apparently the EC does not intialize it, so unless ACPI DSDT
4770  *      does so, its initial value is meaningless (0x07).
4771  *
4772  *      For firmware bugs, refer to:
4773  *      http://thinkwiki.org/wiki/Embedded_Controller_Firmware#Firmware_Issues
4774  *
4775  *      ----
4776  *
4777  *      ThinkPad EC register 0x84 (LSB), 0x85 (MSB):
4778  *      Main fan tachometer reading (in RPM)
4779  *
4780  *      This register is present on all ThinkPads with a new-style EC, and
4781  *      it is known not to be present on the A21m/e, and T22, as there is
4782  *      something else in offset 0x84 according to the ACPI DSDT.  Other
4783  *      ThinkPads from this same time period (and earlier) probably lack the
4784  *      tachometer as well.
4785  *
4786  *      Unfortunately a lot of ThinkPads with new-style ECs but whose firwmare
4787  *      was never fixed by IBM to report the EC firmware version string
4788  *      probably support the tachometer (like the early X models), so
4789  *      detecting it is quite hard.  We need more data to know for sure.
4790  *
4791  *      FIRMWARE BUG: always read 0x84 first, otherwise incorrect readings
4792  *      might result.
4793  *
4794  *      FIRMWARE BUG: may go stale while the EC is switching to full speed
4795  *      mode.
4796  *
4797  *      For firmware bugs, refer to:
4798  *      http://thinkwiki.org/wiki/Embedded_Controller_Firmware#Firmware_Issues
4799  *
4800  * TPACPI_FAN_WR_ACPI_FANS:
4801  *      ThinkPad X31, X40, X41.  Not available in the X60.
4802  *
4803  *      FANS ACPI handle: takes three arguments: low speed, medium speed,
4804  *      high speed.  ACPI DSDT seems to map these three speeds to levels
4805  *      as follows: STOP LOW LOW MED MED HIGH HIGH HIGH HIGH
4806  *      (this map is stored on FAN0..FAN8 as "0,1,1,2,2,3,3,3,3")
4807  *
4808  *      The speeds are stored on handles
4809  *      (FANA:FAN9), (FANC:FANB), (FANE:FAND).
4810  *
4811  *      There are three default speed sets, acessible as handles:
4812  *      FS1L,FS1M,FS1H; FS2L,FS2M,FS2H; FS3L,FS3M,FS3H
4813  *
4814  *      ACPI DSDT switches which set is in use depending on various
4815  *      factors.
4816  *
4817  *      TPACPI_FAN_WR_TPEC is also available and should be used to
4818  *      command the fan.  The X31/X40/X41 seems to have 8 fan levels,
4819  *      but the ACPI tables just mention level 7.
4820  */
4821
4822 static enum fan_status_access_mode fan_status_access_mode;
4823 static enum fan_control_access_mode fan_control_access_mode;
4824 static enum fan_control_commands fan_control_commands;
4825
4826 static u8 fan_control_initial_status;
4827 static u8 fan_control_desired_level;
4828
4829 static void fan_watchdog_fire(struct work_struct *ignored);
4830 static int fan_watchdog_maxinterval;
4831 static DECLARE_DELAYED_WORK(fan_watchdog_task, fan_watchdog_fire);
4832
4833 IBM_HANDLE(fans, ec, "FANS");   /* X31, X40, X41 */
4834 IBM_HANDLE(gfan, ec, "GFAN",    /* 570 */
4835            "\\FSPD",            /* 600e/x, 770e, 770x */
4836            );                   /* all others */
4837 IBM_HANDLE(sfan, ec, "SFAN",    /* 570 */
4838            "JFNS",              /* 770x-JL */
4839            );                   /* all others */
4840
4841 /*
4842  * SYSFS fan layout: hwmon compatible (device)
4843  *
4844  * pwm*_enable:
4845  *      0: "disengaged" mode
4846  *      1: manual mode
4847  *      2: native EC "auto" mode (recommended, hardware default)
4848  *
4849  * pwm*: set speed in manual mode, ignored otherwise.
4850  *      0 is level 0; 255 is level 7. Intermediate points done with linear
4851  *      interpolation.
4852  *
4853  * fan*_input: tachometer reading, RPM
4854  *
4855  *
4856  * SYSFS fan layout: extensions
4857  *
4858  * fan_watchdog (driver):
4859  *      fan watchdog interval in seconds, 0 disables (default), max 120
4860  */
4861
4862 /* sysfs fan pwm1_enable ----------------------------------------------- */
4863 static ssize_t fan_pwm1_enable_show(struct device *dev,
4864                                     struct device_attribute *attr,
4865                                     char *buf)
4866 {
4867         int res, mode;
4868         u8 status;
4869
4870         res = fan_get_status_safe(&status);
4871         if (res)
4872                 return res;
4873
4874         if (unlikely(tp_features.fan_ctrl_status_undef)) {
4875                 if (status != fan_control_initial_status) {
4876                         tp_features.fan_ctrl_status_undef = 0;
4877                 } else {
4878                         /* Return most likely status. In fact, it
4879                          * might be the only possible status */
4880                         status = TP_EC_FAN_AUTO;
4881                 }
4882         }
4883
4884         if (status & TP_EC_FAN_FULLSPEED) {
4885                 mode = 0;
4886         } else if (status & TP_EC_FAN_AUTO) {
4887                 mode = 2;
4888         } else
4889                 mode = 1;
4890
4891         return snprintf(buf, PAGE_SIZE, "%d\n", mode);
4892 }
4893
4894 static ssize_t fan_pwm1_enable_store(struct device *dev,
4895                                      struct device_attribute *attr,
4896                                      const char *buf, size_t count)
4897 {
4898         unsigned long t;
4899         int res, level;
4900
4901         if (parse_strtoul(buf, 2, &t))
4902                 return -EINVAL;
4903
4904         switch (t) {
4905         case 0:
4906                 level = TP_EC_FAN_FULLSPEED;
4907                 break;
4908         case 1:
4909                 level = TPACPI_FAN_LAST_LEVEL;
4910                 break;
4911         case 2:
4912                 level = TP_EC_FAN_AUTO;
4913                 break;
4914         case 3:
4915                 /* reserved for software-controlled auto mode */
4916                 return -ENOSYS;
4917         default:
4918                 return -EINVAL;
4919         }
4920
4921         res = fan_set_level_safe(level);
4922         if (res == -ENXIO)
4923                 return -EINVAL;
4924         else if (res < 0)
4925                 return res;
4926
4927         fan_watchdog_reset();
4928
4929         return count;
4930 }
4931
4932 static struct device_attribute dev_attr_fan_pwm1_enable =
4933         __ATTR(pwm1_enable, S_IWUSR | S_IRUGO,
4934                 fan_pwm1_enable_show, fan_pwm1_enable_store);
4935
4936 /* sysfs fan pwm1 ------------------------------------------------------ */
4937 static ssize_t fan_pwm1_show(struct device *dev,
4938                              struct device_attribute *attr,
4939                              char *buf)
4940 {
4941         int res;
4942         u8 status;
4943
4944         res = fan_get_status_safe(&status);
4945         if (res)
4946                 return res;
4947
4948         if (unlikely(tp_features.fan_ctrl_status_undef)) {
4949                 if (status != fan_control_initial_status) {
4950                         tp_features.fan_ctrl_status_undef = 0;
4951                 } else {
4952                         status = TP_EC_FAN_AUTO;
4953                 }
4954         }
4955
4956         if ((status &
4957              (TP_EC_FAN_AUTO | TP_EC_FAN_FULLSPEED)) != 0)
4958                 status = fan_control_desired_level;
4959
4960         if (status > 7)
4961                 status = 7;
4962
4963         return snprintf(buf, PAGE_SIZE, "%u\n", (status * 255) / 7);
4964 }
4965
4966 static ssize_t fan_pwm1_store(struct device *dev,
4967                               struct device_attribute *attr,
4968                               const char *buf, size_t count)
4969 {
4970         unsigned long s;
4971         int rc;
4972         u8 status, newlevel;
4973
4974         if (parse_strtoul(buf, 255, &s))
4975                 return -EINVAL;
4976
4977         /* scale down from 0-255 to 0-7 */
4978         newlevel = (s >> 5) & 0x07;
4979
4980         if (mutex_lock_interruptible(&fan_mutex))
4981                 return -ERESTARTSYS;
4982
4983         rc = fan_get_status(&status);
4984         if (!rc && (status &
4985                     (TP_EC_FAN_AUTO | TP_EC_FAN_FULLSPEED)) == 0) {
4986                 rc = fan_set_level(newlevel);
4987                 if (rc == -ENXIO)
4988                         rc = -EINVAL;
4989                 else if (!rc) {
4990                         fan_update_desired_level(newlevel);
4991                         fan_watchdog_reset();
4992                 }
4993         }
4994
4995         mutex_unlock(&fan_mutex);
4996         return (rc)? rc : count;
4997 }
4998
4999 static struct device_attribute dev_attr_fan_pwm1 =
5000         __ATTR(pwm1, S_IWUSR | S_IRUGO,
5001                 fan_pwm1_show, fan_pwm1_store);
5002
5003 /* sysfs fan fan1_input ------------------------------------------------ */
5004 static ssize_t fan_fan1_input_show(struct device *dev,
5005                            struct device_attribute *attr,
5006                            char *buf)
5007 {
5008         int res;
5009         unsigned int speed;
5010
5011         res = fan_get_speed(&speed);
5012         if (res < 0)
5013                 return res;
5014
5015         return snprintf(buf, PAGE_SIZE, "%u\n", speed);
5016 }
5017
5018 static struct device_attribute dev_attr_fan_fan1_input =
5019         __ATTR(fan1_input, S_IRUGO,
5020                 fan_fan1_input_show, NULL);
5021
5022 /* sysfs fan fan_watchdog (hwmon driver) ------------------------------- */
5023 static ssize_t fan_fan_watchdog_show(struct device_driver *drv,
5024                                      char *buf)
5025 {
5026         return snprintf(buf, PAGE_SIZE, "%u\n", fan_watchdog_maxinterval);
5027 }
5028
5029 static ssize_t fan_fan_watchdog_store(struct device_driver *drv,
5030                                       const char *buf, size_t count)
5031 {
5032         unsigned long t;
5033
5034         if (parse_strtoul(buf, 120, &t))
5035                 return -EINVAL;
5036
5037         if (!fan_control_allowed)
5038                 return -EPERM;
5039
5040         fan_watchdog_maxinterval = t;
5041         fan_watchdog_reset();
5042
5043         return count;
5044 }
5045
5046 static DRIVER_ATTR(fan_watchdog, S_IWUSR | S_IRUGO,
5047                 fan_fan_watchdog_show, fan_fan_watchdog_store);
5048
5049 /* --------------------------------------------------------------------- */
5050 static struct attribute *fan_attributes[] = {
5051         &dev_attr_fan_pwm1_enable.attr, &dev_attr_fan_pwm1.attr,
5052         &dev_attr_fan_fan1_input.attr,
5053         NULL
5054 };
5055
5056 static const struct attribute_group fan_attr_group = {
5057         .attrs = fan_attributes,
5058 };
5059
5060 static int __init fan_init(struct ibm_init_struct *iibm)
5061 {
5062         int rc;
5063
5064         vdbg_printk(TPACPI_DBG_INIT, "initializing fan subdriver\n");
5065
5066         mutex_init(&fan_mutex);
5067         fan_status_access_mode = TPACPI_FAN_NONE;
5068         fan_control_access_mode = TPACPI_FAN_WR_NONE;
5069         fan_control_commands = 0;
5070         fan_watchdog_maxinterval = 0;
5071         tp_features.fan_ctrl_status_undef = 0;
5072         fan_control_desired_level = 7;
5073
5074         IBM_ACPIHANDLE_INIT(fans);
5075         IBM_ACPIHANDLE_INIT(gfan);
5076         IBM_ACPIHANDLE_INIT(sfan);
5077
5078         if (gfan_handle) {
5079                 /* 570, 600e/x, 770e, 770x */
5080                 fan_status_access_mode = TPACPI_FAN_RD_ACPI_GFAN;
5081         } else {
5082                 /* all other ThinkPads: note that even old-style
5083                  * ThinkPad ECs supports the fan control register */
5084                 if (likely(acpi_ec_read(fan_status_offset,
5085                                         &fan_control_initial_status))) {
5086                         fan_status_access_mode = TPACPI_FAN_RD_TPEC;
5087
5088                         /* In some ThinkPads, neither the EC nor the ACPI
5089                          * DSDT initialize the fan status, and it ends up
5090                          * being set to 0x07 when it *could* be either
5091                          * 0x07 or 0x80.
5092                          *
5093                          * Enable for TP-1Y (T43), TP-78 (R51e),
5094                          * TP-76 (R52), TP-70 (T43, R52), which are known
5095                          * to be buggy. */
5096                         if (fan_control_initial_status == 0x07) {
5097                                 switch (thinkpad_id.ec_model) {
5098                                 case 0x5931: /* TP-1Y */
5099                                 case 0x3837: /* TP-78 */
5100                                 case 0x3637: /* TP-76 */
5101                                 case 0x3037: /* TP-70 */
5102                                         printk(IBM_NOTICE
5103                                                "fan_init: initial fan status is "
5104                                                "unknown, assuming it is in auto "
5105                                                "mode\n");
5106                                         tp_features.fan_ctrl_status_undef = 1;
5107                                         ;;
5108                                 }
5109                         }
5110                 } else {
5111                         printk(IBM_ERR
5112                                "ThinkPad ACPI EC access misbehaving, "
5113                                "fan status and control unavailable\n");
5114                         return 1;
5115                 }
5116         }
5117
5118         if (sfan_handle) {
5119                 /* 570, 770x-JL */
5120                 fan_control_access_mode = TPACPI_FAN_WR_ACPI_SFAN;
5121                 fan_control_commands |=
5122                     TPACPI_FAN_CMD_LEVEL | TPACPI_FAN_CMD_ENABLE;
5123         } else {
5124                 if (!gfan_handle) {
5125                         /* gfan without sfan means no fan control */
5126                         /* all other models implement TP EC 0x2f control */
5127
5128                         if (fans_handle) {
5129                                 /* X31, X40, X41 */
5130                                 fan_control_access_mode =
5131                                     TPACPI_FAN_WR_ACPI_FANS;
5132                                 fan_control_commands |=
5133                                     TPACPI_FAN_CMD_SPEED |
5134                                     TPACPI_FAN_CMD_LEVEL |
5135                                     TPACPI_FAN_CMD_ENABLE;
5136                         } else {
5137                                 fan_control_access_mode = TPACPI_FAN_WR_TPEC;
5138                                 fan_control_commands |=
5139                                     TPACPI_FAN_CMD_LEVEL |
5140                                     TPACPI_FAN_CMD_ENABLE;
5141                         }
5142                 }
5143         }
5144
5145         vdbg_printk(TPACPI_DBG_INIT, "fan is %s, modes %d, %d\n",
5146                 str_supported(fan_status_access_mode != TPACPI_FAN_NONE ||
5147                   fan_control_access_mode != TPACPI_FAN_WR_NONE),
5148                 fan_status_access_mode, fan_control_access_mode);
5149
5150         /* fan control master switch */
5151         if (!fan_control_allowed) {
5152                 fan_control_access_mode = TPACPI_FAN_WR_NONE;
5153                 fan_control_commands = 0;
5154                 dbg_printk(TPACPI_DBG_INIT,
5155                            "fan control features disabled by parameter\n");
5156         }
5157
5158         /* update fan_control_desired_level */
5159         if (fan_status_access_mode != TPACPI_FAN_NONE)
5160                 fan_get_status_safe(NULL);
5161
5162         if (fan_status_access_mode != TPACPI_FAN_NONE ||
5163             fan_control_access_mode != TPACPI_FAN_WR_NONE) {
5164                 rc = sysfs_create_group(&tpacpi_sensors_pdev->dev.kobj,
5165                                          &fan_attr_group);
5166                 if (!(rc < 0))
5167                         rc = driver_create_file(&tpacpi_hwmon_pdriver.driver,
5168                                         &driver_attr_fan_watchdog);
5169                 if (rc < 0)
5170                         return rc;
5171                 return 0;
5172         } else
5173                 return 1;
5174 }
5175
5176 /*
5177  * Call with fan_mutex held
5178  */
5179 static void fan_update_desired_level(u8 status)
5180 {
5181         if ((status &
5182              (TP_EC_FAN_AUTO | TP_EC_FAN_FULLSPEED)) == 0) {
5183                 if (status > 7)
5184                         fan_control_desired_level = 7;
5185                 else
5186                         fan_control_desired_level = status;
5187         }
5188 }
5189
5190 static int fan_get_status(u8 *status)
5191 {
5192         u8 s;
5193
5194         /* TODO:
5195          * Add TPACPI_FAN_RD_ACPI_FANS ? */
5196
5197         switch (fan_status_access_mode) {
5198         case TPACPI_FAN_RD_ACPI_GFAN:
5199                 /* 570, 600e/x, 770e, 770x */
5200
5201                 if (unlikely(!acpi_evalf(gfan_handle, &s, NULL, "d")))
5202                         return -EIO;
5203
5204                 if (likely(status))
5205                         *status = s & 0x07;
5206
5207                 break;
5208
5209         case TPACPI_FAN_RD_TPEC:
5210                 /* all except 570, 600e/x, 770e, 770x */
5211                 if (unlikely(!acpi_ec_read(fan_status_offset, &s)))
5212                         return -EIO;
5213
5214                 if (likely(status))
5215                         *status = s;
5216
5217                 break;
5218
5219         default:
5220                 return -ENXIO;
5221         }
5222
5223         return 0;
5224 }
5225
5226 static int fan_get_status_safe(u8 *status)
5227 {
5228         int rc;
5229         u8 s;
5230
5231         if (mutex_lock_interruptible(&fan_mutex))
5232                 return -ERESTARTSYS;
5233         rc = fan_get_status(&s);
5234         if (!rc)
5235                 fan_update_desired_level(s);
5236         mutex_unlock(&fan_mutex);
5237
5238         if (status)
5239                 *status = s;
5240
5241         return rc;
5242 }
5243
5244 static void fan_exit(void)
5245 {
5246         vdbg_printk(TPACPI_DBG_EXIT, "cancelling any pending fan watchdog tasks\n");
5247
5248         /* FIXME: can we really do this unconditionally? */
5249         sysfs_remove_group(&tpacpi_sensors_pdev->dev.kobj, &fan_attr_group);
5250         driver_remove_file(&tpacpi_hwmon_pdriver.driver, &driver_attr_fan_watchdog);
5251
5252         cancel_delayed_work(&fan_watchdog_task);
5253         flush_scheduled_work();
5254 }
5255
5256 static int fan_get_speed(unsigned int *speed)
5257 {
5258         u8 hi, lo;
5259
5260         switch (fan_status_access_mode) {
5261         case TPACPI_FAN_RD_TPEC:
5262                 /* all except 570, 600e/x, 770e, 770x */
5263                 if (unlikely(!acpi_ec_read(fan_rpm_offset, &lo) ||
5264                              !acpi_ec_read(fan_rpm_offset + 1, &hi)))
5265                         return -EIO;
5266
5267                 if (likely(speed))
5268                         *speed = (hi << 8) | lo;
5269
5270                 break;
5271
5272         default:
5273                 return -ENXIO;
5274         }
5275
5276         return 0;
5277 }
5278
5279 static void fan_watchdog_fire(struct work_struct *ignored)
5280 {
5281         int rc;
5282
5283         if (tpacpi_lifecycle != TPACPI_LIFE_RUNNING)
5284                 return;
5285
5286         printk(IBM_NOTICE "fan watchdog: enabling fan\n");
5287         rc = fan_set_enable();
5288         if (rc < 0) {
5289                 printk(IBM_ERR "fan watchdog: error %d while enabling fan, "
5290                         "will try again later...\n", -rc);
5291                 /* reschedule for later */
5292                 fan_watchdog_reset();
5293         }
5294 }
5295
5296 static void fan_watchdog_reset(void)
5297 {
5298         static int fan_watchdog_active;
5299
5300         if (fan_control_access_mode == TPACPI_FAN_WR_NONE)
5301                 return;
5302
5303         if (fan_watchdog_active)
5304                 cancel_delayed_work(&fan_watchdog_task);
5305
5306         if (fan_watchdog_maxinterval > 0 &&
5307             tpacpi_lifecycle != TPACPI_LIFE_EXITING) {
5308                 fan_watchdog_active = 1;
5309                 if (!schedule_delayed_work(&fan_watchdog_task,
5310                                 msecs_to_jiffies(fan_watchdog_maxinterval
5311                                                  * 1000))) {
5312                         printk(IBM_ERR "failed to schedule the fan watchdog, "
5313                                "watchdog will not trigger\n");
5314                 }
5315         } else
5316                 fan_watchdog_active = 0;
5317 }
5318
5319 static int fan_set_level(int level)
5320 {
5321         if (!fan_control_allowed)
5322                 return -EPERM;
5323
5324         switch (fan_control_access_mode) {
5325         case TPACPI_FAN_WR_ACPI_SFAN:
5326                 if (level >= 0 && level <= 7) {
5327                         if (!acpi_evalf(sfan_handle, NULL, NULL, "vd", level))
5328                                 return -EIO;
5329                 } else
5330                         return -EINVAL;
5331                 break;
5332
5333         case TPACPI_FAN_WR_ACPI_FANS:
5334         case TPACPI_FAN_WR_TPEC:
5335                 if ((level != TP_EC_FAN_AUTO) &&
5336                     (level != TP_EC_FAN_FULLSPEED) &&
5337                     ((level < 0) || (level > 7)))
5338                         return -EINVAL;
5339
5340                 /* safety net should the EC not support AUTO
5341                  * or FULLSPEED mode bits and just ignore them */
5342                 if (level & TP_EC_FAN_FULLSPEED)
5343                         level |= 7;     /* safety min speed 7 */
5344                 else if (level & TP_EC_FAN_FULLSPEED)
5345                         level |= 4;     /* safety min speed 4 */
5346
5347                 if (!acpi_ec_write(fan_status_offset, level))
5348                         return -EIO;
5349                 else
5350                         tp_features.fan_ctrl_status_undef = 0;
5351                 break;
5352
5353         default:
5354                 return -ENXIO;
5355         }
5356         return 0;
5357 }
5358
5359 static int fan_set_level_safe(int level)
5360 {
5361         int rc;
5362
5363         if (!fan_control_allowed)
5364                 return -EPERM;
5365
5366         if (mutex_lock_interruptible(&fan_mutex))
5367                 return -ERESTARTSYS;
5368
5369         if (level == TPACPI_FAN_LAST_LEVEL)
5370                 level = fan_control_desired_level;
5371
5372         rc = fan_set_level(level);
5373         if (!rc)
5374                 fan_update_desired_level(level);
5375
5376         mutex_unlock(&fan_mutex);
5377         return rc;
5378 }
5379
5380 static int fan_set_enable(void)
5381 {
5382         u8 s;
5383         int rc;
5384
5385         if (!fan_control_allowed)
5386                 return -EPERM;
5387
5388         if (mutex_lock_interruptible(&fan_mutex))
5389                 return -ERESTARTSYS;
5390
5391         switch (fan_control_access_mode) {
5392         case TPACPI_FAN_WR_ACPI_FANS:
5393         case TPACPI_FAN_WR_TPEC:
5394                 rc = fan_get_status(&s);
5395                 if (rc < 0)
5396                         break;
5397
5398                 /* Don't go out of emergency fan mode */
5399                 if (s != 7) {
5400                         s &= 0x07;
5401                         s |= TP_EC_FAN_AUTO | 4; /* min fan speed 4 */
5402                 }
5403
5404                 if (!acpi_ec_write(fan_status_offset, s))
5405                         rc = -EIO;
5406                 else {
5407                         tp_features.fan_ctrl_status_undef = 0;
5408                         rc = 0;
5409                 }
5410                 break;
5411
5412         case TPACPI_FAN_WR_ACPI_SFAN:
5413                 rc = fan_get_status(&s);
5414                 if (rc < 0)
5415                         break;
5416
5417                 s &= 0x07;
5418
5419                 /* Set fan to at least level 4 */
5420                 s |= 4;
5421
5422                 if (!acpi_evalf(sfan_handle, NULL, NULL, "vd", s))
5423                         rc= -EIO;
5424                 else
5425                         rc = 0;
5426                 break;
5427
5428         default:
5429                 rc = -ENXIO;
5430         }
5431
5432         mutex_unlock(&fan_mutex);
5433         return rc;
5434 }
5435
5436 static int fan_set_disable(void)
5437 {
5438         int rc;
5439
5440         if (!fan_control_allowed)
5441                 return -EPERM;
5442
5443         if (mutex_lock_interruptible(&fan_mutex))
5444                 return -ERESTARTSYS;
5445
5446         rc = 0;
5447         switch (fan_control_access_mode) {
5448         case TPACPI_FAN_WR_ACPI_FANS:
5449         case TPACPI_FAN_WR_TPEC:
5450                 if (!acpi_ec_write(fan_status_offset, 0x00))
5451                         rc = -EIO;
5452                 else {
5453                         fan_control_desired_level = 0;
5454                         tp_features.fan_ctrl_status_undef = 0;
5455                 }
5456                 break;
5457
5458         case TPACPI_FAN_WR_ACPI_SFAN:
5459                 if (!acpi_evalf(sfan_handle, NULL, NULL, "vd", 0x00))
5460                         rc = -EIO;
5461                 else
5462                         fan_control_desired_level = 0;
5463                 break;
5464
5465         default:
5466                 rc = -ENXIO;
5467         }
5468
5469
5470         mutex_unlock(&fan_mutex);
5471         return rc;
5472 }
5473
5474 static int fan_set_speed(int speed)
5475 {
5476         int rc;
5477
5478         if (!fan_control_allowed)
5479                 return -EPERM;
5480
5481         if (mutex_lock_interruptible(&fan_mutex))
5482                 return -ERESTARTSYS;
5483
5484         rc = 0;
5485         switch (fan_control_access_mode) {
5486         case TPACPI_FAN_WR_ACPI_FANS:
5487                 if (speed >= 0 && speed <= 65535) {
5488                         if (!acpi_evalf(fans_handle, NULL, NULL, "vddd",
5489                                         speed, speed, speed))
5490                                 rc = -EIO;
5491                 } else
5492                         rc = -EINVAL;
5493                 break;
5494
5495         default:
5496                 rc = -ENXIO;
5497         }
5498
5499         mutex_unlock(&fan_mutex);
5500         return rc;
5501 }
5502
5503 static int fan_read(char *p)
5504 {
5505         int len = 0;
5506         int rc;
5507         u8 status;
5508         unsigned int speed = 0;
5509
5510         switch (fan_status_access_mode) {
5511         case TPACPI_FAN_RD_ACPI_GFAN:
5512                 /* 570, 600e/x, 770e, 770x */
5513                 if ((rc = fan_get_status_safe(&status)) < 0)
5514                         return rc;
5515
5516                 len += sprintf(p + len, "status:\t\t%s\n"
5517                                "level:\t\t%d\n",
5518                                (status != 0) ? "enabled" : "disabled", status);
5519                 break;
5520
5521         case TPACPI_FAN_RD_TPEC:
5522                 /* all except 570, 600e/x, 770e, 770x */
5523                 if ((rc = fan_get_status_safe(&status)) < 0)
5524                         return rc;
5525
5526                 if (unlikely(tp_features.fan_ctrl_status_undef)) {
5527                         if (status != fan_control_initial_status)
5528                                 tp_features.fan_ctrl_status_undef = 0;
5529                         else
5530                                 /* Return most likely status. In fact, it
5531                                  * might be the only possible status */
5532                                 status = TP_EC_FAN_AUTO;
5533                 }
5534
5535                 len += sprintf(p + len, "status:\t\t%s\n",
5536                                (status != 0) ? "enabled" : "disabled");
5537
5538                 if ((rc = fan_get_speed(&speed)) < 0)
5539                         return rc;
5540
5541                 len += sprintf(p + len, "speed:\t\t%d\n", speed);
5542
5543                 if (status & TP_EC_FAN_FULLSPEED)
5544                         /* Disengaged mode takes precedence */
5545                         len += sprintf(p + len, "level:\t\tdisengaged\n");
5546                 else if (status & TP_EC_FAN_AUTO)
5547                         len += sprintf(p + len, "level:\t\tauto\n");
5548                 else
5549                         len += sprintf(p + len, "level:\t\t%d\n", status);
5550                 break;
5551
5552         case TPACPI_FAN_NONE:
5553         default:
5554                 len += sprintf(p + len, "status:\t\tnot supported\n");
5555         }
5556
5557         if (fan_control_commands & TPACPI_FAN_CMD_LEVEL) {
5558                 len += sprintf(p + len, "commands:\tlevel <level>");
5559
5560                 switch (fan_control_access_mode) {
5561                 case TPACPI_FAN_WR_ACPI_SFAN:
5562                         len += sprintf(p + len, " (<level> is 0-7)\n");
5563                         break;
5564
5565                 default:
5566                         len += sprintf(p + len, " (<level> is 0-7, "
5567                                        "auto, disengaged, full-speed)\n");
5568                         break;
5569                 }
5570         }
5571
5572         if (fan_control_commands & TPACPI_FAN_CMD_ENABLE)
5573                 len += sprintf(p + len, "commands:\tenable, disable\n"
5574                                "commands:\twatchdog <timeout> (<timeout> is 0 (off), "
5575                                "1-120 (seconds))\n");
5576
5577         if (fan_control_commands & TPACPI_FAN_CMD_SPEED)
5578                 len += sprintf(p + len, "commands:\tspeed <speed>"
5579                                " (<speed> is 0-65535)\n");
5580
5581         return len;
5582 }
5583
5584 static int fan_write_cmd_level(const char *cmd, int *rc)
5585 {
5586         int level;
5587
5588         if (strlencmp(cmd, "level auto") == 0)
5589                 level = TP_EC_FAN_AUTO;
5590         else if ((strlencmp(cmd, "level disengaged") == 0) |
5591                  (strlencmp(cmd, "level full-speed") == 0))
5592                 level = TP_EC_FAN_FULLSPEED;
5593         else if (sscanf(cmd, "level %d", &level) != 1)
5594                 return 0;
5595
5596         if ((*rc = fan_set_level_safe(level)) == -ENXIO)
5597                 printk(IBM_ERR "level command accepted for unsupported "
5598                        "access mode %d", fan_control_access_mode);
5599
5600         return 1;
5601 }
5602
5603 static int fan_write_cmd_enable(const char *cmd, int *rc)
5604 {
5605         if (strlencmp(cmd, "enable") != 0)
5606                 return 0;
5607
5608         if ((*rc = fan_set_enable()) == -ENXIO)
5609                 printk(IBM_ERR "enable command accepted for unsupported "
5610                        "access mode %d", fan_control_access_mode);
5611
5612         return 1;
5613 }
5614
5615 static int fan_write_cmd_disable(const char *cmd, int *rc)
5616 {
5617         if (strlencmp(cmd, "disable") != 0)
5618                 return 0;
5619
5620         if ((*rc = fan_set_disable()) == -ENXIO)
5621                 printk(IBM_ERR "disable command accepted for unsupported "
5622                        "access mode %d", fan_control_access_mode);
5623
5624         return 1;
5625 }
5626
5627 static int fan_write_cmd_speed(const char *cmd, int *rc)
5628 {
5629         int speed;
5630
5631         /* TODO:
5632          * Support speed <low> <medium> <high> ? */
5633
5634         if (sscanf(cmd, "speed %d", &speed) != 1)
5635                 return 0;
5636
5637         if ((*rc = fan_set_speed(speed)) == -ENXIO)
5638                 printk(IBM_ERR "speed command accepted for unsupported "
5639                        "access mode %d", fan_control_access_mode);
5640
5641         return 1;
5642 }
5643
5644 static int fan_write_cmd_watchdog(const char *cmd, int *rc)
5645 {
5646         int interval;
5647
5648         if (sscanf(cmd, "watchdog %d", &interval) != 1)
5649                 return 0;
5650
5651         if (interval < 0 || interval > 120)
5652                 *rc = -EINVAL;
5653         else
5654                 fan_watchdog_maxinterval = interval;
5655
5656         return 1;
5657 }
5658
5659 static int fan_write(char *buf)
5660 {
5661         char *cmd;
5662         int rc = 0;
5663
5664         while (!rc && (cmd = next_cmd(&buf))) {
5665                 if (!((fan_control_commands & TPACPI_FAN_CMD_LEVEL) &&
5666                       fan_write_cmd_level(cmd, &rc)) &&
5667                     !((fan_control_commands & TPACPI_FAN_CMD_ENABLE) &&
5668                       (fan_write_cmd_enable(cmd, &rc) ||
5669                        fan_write_cmd_disable(cmd, &rc) ||
5670                        fan_write_cmd_watchdog(cmd, &rc))) &&
5671                     !((fan_control_commands & TPACPI_FAN_CMD_SPEED) &&
5672                       fan_write_cmd_speed(cmd, &rc))
5673                     )
5674                         rc = -EINVAL;
5675                 else if (!rc)
5676                         fan_watchdog_reset();
5677         }
5678
5679         return rc;
5680 }
5681
5682 static struct ibm_struct fan_driver_data = {
5683         .name = "fan",
5684         .read = fan_read,
5685         .write = fan_write,
5686         .exit = fan_exit,
5687 };
5688
5689 /****************************************************************************
5690  ****************************************************************************
5691  *
5692  * Infrastructure
5693  *
5694  ****************************************************************************
5695  ****************************************************************************/
5696
5697 /* sysfs name ---------------------------------------------------------- */
5698 static ssize_t thinkpad_acpi_pdev_name_show(struct device *dev,
5699                            struct device_attribute *attr,
5700                            char *buf)
5701 {
5702         return snprintf(buf, PAGE_SIZE, "%s\n", IBM_NAME);
5703 }
5704
5705 static struct device_attribute dev_attr_thinkpad_acpi_pdev_name =
5706         __ATTR(name, S_IRUGO, thinkpad_acpi_pdev_name_show, NULL);
5707
5708 /* --------------------------------------------------------------------- */
5709
5710 /* /proc support */
5711 static struct proc_dir_entry *proc_dir;
5712
5713 /* Subdriver registry */
5714 static LIST_HEAD(tpacpi_all_drivers);
5715
5716
5717 /*
5718  * Module and infrastructure proble, init and exit handling
5719  */
5720
5721 #ifdef CONFIG_THINKPAD_ACPI_DEBUG
5722 static const char * __init str_supported(int is_supported)
5723 {
5724         static char text_unsupported[] __initdata = "not supported";
5725
5726         return (is_supported)? &text_unsupported[4] : &text_unsupported[0];
5727 }
5728 #endif /* CONFIG_THINKPAD_ACPI_DEBUG */
5729
5730 static int __init ibm_init(struct ibm_init_struct *iibm)
5731 {
5732         int ret;
5733         struct ibm_struct *ibm = iibm->data;
5734         struct proc_dir_entry *entry;
5735
5736         BUG_ON(ibm == NULL);
5737
5738         INIT_LIST_HEAD(&ibm->all_drivers);
5739
5740         if (ibm->flags.experimental && !experimental)
5741                 return 0;
5742
5743         dbg_printk(TPACPI_DBG_INIT,
5744                 "probing for %s\n", ibm->name);
5745
5746         if (iibm->init) {
5747                 ret = iibm->init(iibm);
5748                 if (ret > 0)
5749                         return 0;       /* probe failed */
5750                 if (ret)
5751                         return ret;
5752
5753                 ibm->flags.init_called = 1;
5754         }
5755
5756         if (ibm->acpi) {
5757                 if (ibm->acpi->hid) {
5758                         ret = register_tpacpi_subdriver(ibm);
5759                         if (ret)
5760                                 goto err_out;
5761                 }
5762
5763                 if (ibm->acpi->notify) {
5764                         ret = setup_acpi_notify(ibm);
5765                         if (ret == -ENODEV) {
5766                                 printk(IBM_NOTICE "disabling subdriver %s\n",
5767                                         ibm->name);
5768                                 ret = 0;
5769                                 goto err_out;
5770                         }
5771                         if (ret < 0)
5772                                 goto err_out;
5773                 }
5774         }
5775
5776         dbg_printk(TPACPI_DBG_INIT,
5777                 "%s installed\n", ibm->name);
5778
5779         if (ibm->read) {
5780                 entry = create_proc_entry(ibm->name,
5781                                           S_IFREG | S_IRUGO | S_IWUSR,
5782                                           proc_dir);
5783                 if (!entry) {
5784                         printk(IBM_ERR "unable to create proc entry %s\n",
5785                                ibm->name);
5786                         ret = -ENODEV;
5787                         goto err_out;
5788                 }
5789                 entry->owner = THIS_MODULE;
5790                 entry->data = ibm;
5791                 entry->read_proc = &dispatch_procfs_read;
5792                 if (ibm->write)
5793                         entry->write_proc = &dispatch_procfs_write;
5794                 ibm->flags.proc_created = 1;
5795         }
5796
5797         list_add_tail(&ibm->all_drivers, &tpacpi_all_drivers);
5798
5799         return 0;
5800
5801 err_out:
5802         dbg_printk(TPACPI_DBG_INIT,
5803                 "%s: at error exit path with result %d\n",
5804                 ibm->name, ret);
5805
5806         ibm_exit(ibm);
5807         return (ret < 0)? ret : 0;
5808 }
5809
5810 static void ibm_exit(struct ibm_struct *ibm)
5811 {
5812         dbg_printk(TPACPI_DBG_EXIT, "removing %s\n", ibm->name);
5813
5814         list_del_init(&ibm->all_drivers);
5815
5816         if (ibm->flags.acpi_notify_installed) {
5817                 dbg_printk(TPACPI_DBG_EXIT,
5818                         "%s: acpi_remove_notify_handler\n", ibm->name);
5819                 BUG_ON(!ibm->acpi);
5820                 acpi_remove_notify_handler(*ibm->acpi->handle,
5821                                            ibm->acpi->type,
5822                                            dispatch_acpi_notify);
5823                 ibm->flags.acpi_notify_installed = 0;
5824                 ibm->flags.acpi_notify_installed = 0;
5825         }
5826
5827         if (ibm->flags.proc_created) {
5828                 dbg_printk(TPACPI_DBG_EXIT,
5829                         "%s: remove_proc_entry\n", ibm->name);
5830                 remove_proc_entry(ibm->name, proc_dir);
5831                 ibm->flags.proc_created = 0;
5832         }
5833
5834         if (ibm->flags.acpi_driver_registered) {
5835                 dbg_printk(TPACPI_DBG_EXIT,
5836                         "%s: acpi_bus_unregister_driver\n", ibm->name);
5837                 BUG_ON(!ibm->acpi);
5838                 acpi_bus_unregister_driver(ibm->acpi->driver);
5839                 kfree(ibm->acpi->driver);
5840                 ibm->acpi->driver = NULL;
5841                 ibm->flags.acpi_driver_registered = 0;
5842         }
5843
5844         if (ibm->flags.init_called && ibm->exit) {
5845                 ibm->exit();
5846                 ibm->flags.init_called = 0;
5847         }
5848
5849         dbg_printk(TPACPI_DBG_INIT, "finished removing %s\n", ibm->name);
5850 }
5851
5852 /* Probing */
5853
5854 static void __init get_thinkpad_model_data(struct thinkpad_id_data *tp)
5855 {
5856         const struct dmi_device *dev = NULL;
5857         char ec_fw_string[18];
5858
5859         if (!tp)
5860                 return;
5861
5862         memset(tp, 0, sizeof(*tp));
5863
5864         if (dmi_name_in_vendors("IBM"))
5865                 tp->vendor = PCI_VENDOR_ID_IBM;
5866         else if (dmi_name_in_vendors("LENOVO"))
5867                 tp->vendor = PCI_VENDOR_ID_LENOVO;
5868         else
5869                 return;
5870
5871         tp->bios_version_str = kstrdup(dmi_get_system_info(DMI_BIOS_VERSION),
5872                                         GFP_KERNEL);
5873         if (!tp->bios_version_str)
5874                 return;
5875         tp->bios_model = tp->bios_version_str[0]
5876                          | (tp->bios_version_str[1] << 8);
5877
5878         /*
5879          * ThinkPad T23 or newer, A31 or newer, R50e or newer,
5880          * X32 or newer, all Z series;  Some models must have an
5881          * up-to-date BIOS or they will not be detected.
5882          *
5883          * See http://thinkwiki.org/wiki/List_of_DMI_IDs
5884          */
5885         while ((dev = dmi_find_device(DMI_DEV_TYPE_OEM_STRING, NULL, dev))) {
5886                 if (sscanf(dev->name,
5887                            "IBM ThinkPad Embedded Controller -[%17c",
5888                            ec_fw_string) == 1) {
5889                         ec_fw_string[sizeof(ec_fw_string) - 1] = 0;
5890                         ec_fw_string[strcspn(ec_fw_string, " ]")] = 0;
5891
5892                         tp->ec_version_str = kstrdup(ec_fw_string, GFP_KERNEL);
5893                         tp->ec_model = ec_fw_string[0]
5894                                         | (ec_fw_string[1] << 8);
5895                         break;
5896                 }
5897         }
5898
5899         tp->model_str = kstrdup(dmi_get_system_info(DMI_PRODUCT_VERSION),
5900                                         GFP_KERNEL);
5901         if (strnicmp(tp->model_str, "ThinkPad", 8) != 0) {
5902                 kfree(tp->model_str);
5903                 tp->model_str = NULL;
5904         }
5905 }
5906
5907 static int __init probe_for_thinkpad(void)
5908 {
5909         int is_thinkpad;
5910
5911         if (acpi_disabled)
5912                 return -ENODEV;
5913
5914         /*
5915          * Non-ancient models have better DMI tagging, but very old models
5916          * don't.
5917          */
5918         is_thinkpad = (thinkpad_id.model_str != NULL);
5919
5920         /* ec is required because many other handles are relative to it */
5921         IBM_ACPIHANDLE_INIT(ec);
5922         if (!ec_handle) {
5923                 if (is_thinkpad)
5924                         printk(IBM_ERR
5925                                 "Not yet supported ThinkPad detected!\n");
5926                 return -ENODEV;
5927         }
5928
5929         /*
5930          * Risks a regression on very old machines, but reduces potential
5931          * false positives a damn great deal
5932          */
5933         if (!is_thinkpad)
5934                 is_thinkpad = (thinkpad_id.vendor == PCI_VENDOR_ID_IBM);
5935
5936         if (!is_thinkpad && !force_load)
5937                 return -ENODEV;
5938
5939         return 0;
5940 }
5941
5942
5943 /* Module init, exit, parameters */
5944
5945 static struct ibm_init_struct ibms_init[] __initdata = {
5946         {
5947                 .init = thinkpad_acpi_driver_init,
5948                 .data = &thinkpad_acpi_driver_data,
5949         },
5950         {
5951                 .init = hotkey_init,
5952                 .data = &hotkey_driver_data,
5953         },
5954         {
5955                 .init = bluetooth_init,
5956                 .data = &bluetooth_driver_data,
5957         },
5958         {
5959                 .init = wan_init,
5960                 .data = &wan_driver_data,
5961         },
5962         {
5963                 .init = video_init,
5964                 .data = &video_driver_data,
5965         },
5966         {
5967                 .init = light_init,
5968                 .data = &light_driver_data,
5969         },
5970 #ifdef CONFIG_THINKPAD_ACPI_DOCK
5971         {
5972                 .init = dock_init,
5973                 .data = &dock_driver_data[0],
5974         },
5975         {
5976                 .init = dock_init2,
5977                 .data = &dock_driver_data[1],
5978         },
5979 #endif
5980 #ifdef CONFIG_THINKPAD_ACPI_BAY
5981         {
5982                 .init = bay_init,
5983                 .data = &bay_driver_data,
5984         },
5985 #endif
5986         {
5987                 .init = cmos_init,
5988                 .data = &cmos_driver_data,
5989         },
5990         {
5991                 .init = led_init,
5992                 .data = &led_driver_data,
5993         },
5994         {
5995                 .init = beep_init,
5996                 .data = &beep_driver_data,
5997         },
5998         {
5999                 .init = thermal_init,
6000                 .data = &thermal_driver_data,
6001         },
6002         {
6003                 .data = &ecdump_driver_data,
6004         },
6005         {
6006                 .init = brightness_init,
6007                 .data = &brightness_driver_data,
6008         },
6009         {
6010                 .data = &volume_driver_data,
6011         },
6012         {
6013                 .init = fan_init,
6014                 .data = &fan_driver_data,
6015         },
6016 };
6017
6018 static int __init set_ibm_param(const char *val, struct kernel_param *kp)
6019 {
6020         unsigned int i;
6021         struct ibm_struct *ibm;
6022
6023         if (!kp || !kp->name || !val)
6024                 return -EINVAL;
6025
6026         for (i = 0; i < ARRAY_SIZE(ibms_init); i++) {
6027                 ibm = ibms_init[i].data;
6028                 WARN_ON(ibm == NULL);
6029
6030                 if (!ibm || !ibm->name)
6031                         continue;
6032
6033                 if (strcmp(ibm->name, kp->name) == 0 && ibm->write) {
6034                         if (strlen(val) > sizeof(ibms_init[i].param) - 2)
6035                                 return -ENOSPC;
6036                         strcpy(ibms_init[i].param, val);
6037                         strcat(ibms_init[i].param, ",");
6038                         return 0;
6039                 }
6040         }
6041
6042         return -EINVAL;
6043 }
6044
6045 static int experimental;
6046 module_param(experimental, int, 0);
6047
6048 static u32 dbg_level;
6049 module_param_named(debug, dbg_level, uint, 0);
6050
6051 static int force_load;
6052 module_param(force_load, bool, 0);
6053
6054 static int fan_control_allowed;
6055 module_param_named(fan_control, fan_control_allowed, bool, 0);
6056
6057 static int brightness_mode;
6058 module_param_named(brightness_mode, brightness_mode, int, 0);
6059
6060 static unsigned int brightness_enable = 2; /* 2 = auto, 0 = no, 1 = yes */
6061 module_param(brightness_enable, uint, 0);
6062
6063 static unsigned int hotkey_report_mode;
6064 module_param(hotkey_report_mode, uint, 0);
6065
6066 #define IBM_PARAM(feature) \
6067         module_param_call(feature, set_ibm_param, NULL, NULL, 0)
6068
6069 IBM_PARAM(hotkey);
6070 IBM_PARAM(bluetooth);
6071 IBM_PARAM(video);
6072 IBM_PARAM(light);
6073 #ifdef CONFIG_THINKPAD_ACPI_DOCK
6074 IBM_PARAM(dock);
6075 #endif
6076 #ifdef CONFIG_THINKPAD_ACPI_BAY
6077 IBM_PARAM(bay);
6078 #endif /* CONFIG_THINKPAD_ACPI_BAY */
6079 IBM_PARAM(cmos);
6080 IBM_PARAM(led);
6081 IBM_PARAM(beep);
6082 IBM_PARAM(ecdump);
6083 IBM_PARAM(brightness);
6084 IBM_PARAM(volume);
6085 IBM_PARAM(fan);
6086
6087 static int __init thinkpad_acpi_module_init(void)
6088 {
6089         int ret, i;
6090
6091         tpacpi_lifecycle = TPACPI_LIFE_INIT;
6092
6093         /* Parameter checking */
6094         if (hotkey_report_mode > 2)
6095                 return -EINVAL;
6096
6097         /* Driver-level probe */
6098
6099         get_thinkpad_model_data(&thinkpad_id);
6100         ret = probe_for_thinkpad();
6101         if (ret) {
6102                 thinkpad_acpi_module_exit();
6103                 return ret;
6104         }
6105
6106         /* Driver initialization */
6107
6108         IBM_ACPIHANDLE_INIT(ecrd);
6109         IBM_ACPIHANDLE_INIT(ecwr);
6110
6111         proc_dir = proc_mkdir(IBM_PROC_DIR, acpi_root_dir);
6112         if (!proc_dir) {
6113                 printk(IBM_ERR "unable to create proc dir " IBM_PROC_DIR);
6114                 thinkpad_acpi_module_exit();
6115                 return -ENODEV;
6116         }
6117         proc_dir->owner = THIS_MODULE;
6118
6119         ret = platform_driver_register(&tpacpi_pdriver);
6120         if (ret) {
6121                 printk(IBM_ERR "unable to register main platform driver\n");
6122                 thinkpad_acpi_module_exit();
6123                 return ret;
6124         }
6125         tp_features.platform_drv_registered = 1;
6126
6127         ret = platform_driver_register(&tpacpi_hwmon_pdriver);
6128         if (ret) {
6129                 printk(IBM_ERR "unable to register hwmon platform driver\n");
6130                 thinkpad_acpi_module_exit();
6131                 return ret;
6132         }
6133         tp_features.sensors_pdrv_registered = 1;
6134
6135         ret = tpacpi_create_driver_attributes(&tpacpi_pdriver.driver);
6136         if (!ret) {
6137                 tp_features.platform_drv_attrs_registered = 1;
6138                 ret = tpacpi_create_driver_attributes(&tpacpi_hwmon_pdriver.driver);
6139         }
6140         if (ret) {
6141                 printk(IBM_ERR "unable to create sysfs driver attributes\n");
6142                 thinkpad_acpi_module_exit();
6143                 return ret;
6144         }
6145         tp_features.sensors_pdrv_attrs_registered = 1;
6146
6147
6148         /* Device initialization */
6149         tpacpi_pdev = platform_device_register_simple(IBM_DRVR_NAME, -1,
6150                                                         NULL, 0);
6151         if (IS_ERR(tpacpi_pdev)) {
6152                 ret = PTR_ERR(tpacpi_pdev);
6153                 tpacpi_pdev = NULL;
6154                 printk(IBM_ERR "unable to register platform device\n");
6155                 thinkpad_acpi_module_exit();
6156                 return ret;
6157         }
6158         tpacpi_sensors_pdev = platform_device_register_simple(
6159                                                         IBM_HWMON_DRVR_NAME,
6160                                                         -1, NULL, 0);
6161         if (IS_ERR(tpacpi_sensors_pdev)) {
6162                 ret = PTR_ERR(tpacpi_sensors_pdev);
6163                 tpacpi_sensors_pdev = NULL;
6164                 printk(IBM_ERR "unable to register hwmon platform device\n");
6165                 thinkpad_acpi_module_exit();
6166                 return ret;
6167         }
6168         ret = device_create_file(&tpacpi_sensors_pdev->dev,
6169                                  &dev_attr_thinkpad_acpi_pdev_name);
6170         if (ret) {
6171                 printk(IBM_ERR
6172                         "unable to create sysfs hwmon device attributes\n");
6173                 thinkpad_acpi_module_exit();
6174                 return ret;
6175         }
6176         tp_features.sensors_pdev_attrs_registered = 1;
6177         tpacpi_hwmon = hwmon_device_register(&tpacpi_sensors_pdev->dev);
6178         if (IS_ERR(tpacpi_hwmon)) {
6179                 ret = PTR_ERR(tpacpi_hwmon);
6180                 tpacpi_hwmon = NULL;
6181                 printk(IBM_ERR "unable to register hwmon device\n");
6182                 thinkpad_acpi_module_exit();
6183                 return ret;
6184         }
6185         mutex_init(&tpacpi_inputdev_send_mutex);
6186         tpacpi_inputdev = input_allocate_device();
6187         if (!tpacpi_inputdev) {
6188                 printk(IBM_ERR "unable to allocate input device\n");
6189                 thinkpad_acpi_module_exit();
6190                 return -ENOMEM;
6191         } else {
6192                 /* Prepare input device, but don't register */
6193                 tpacpi_inputdev->name = "ThinkPad Extra Buttons";
6194                 tpacpi_inputdev->phys = IBM_DRVR_NAME "/input0";
6195                 tpacpi_inputdev->id.bustype = BUS_HOST;
6196                 tpacpi_inputdev->id.vendor = (thinkpad_id.vendor) ?
6197                                                 thinkpad_id.vendor :
6198                                                 PCI_VENDOR_ID_IBM;
6199                 tpacpi_inputdev->id.product = TPACPI_HKEY_INPUT_PRODUCT;
6200                 tpacpi_inputdev->id.version = TPACPI_HKEY_INPUT_VERSION;
6201         }
6202         for (i = 0; i < ARRAY_SIZE(ibms_init); i++) {
6203                 ret = ibm_init(&ibms_init[i]);
6204                 if (ret >= 0 && *ibms_init[i].param)
6205                         ret = ibms_init[i].data->write(ibms_init[i].param);
6206                 if (ret < 0) {
6207                         thinkpad_acpi_module_exit();
6208                         return ret;
6209                 }
6210         }
6211         ret = input_register_device(tpacpi_inputdev);
6212         if (ret < 0) {
6213                 printk(IBM_ERR "unable to register input device\n");
6214                 thinkpad_acpi_module_exit();
6215                 return ret;
6216         } else {
6217                 tp_features.input_device_registered = 1;
6218         }
6219
6220         tpacpi_lifecycle = TPACPI_LIFE_RUNNING;
6221         return 0;
6222 }
6223
6224 static void thinkpad_acpi_module_exit(void)
6225 {
6226         struct ibm_struct *ibm, *itmp;
6227
6228         tpacpi_lifecycle = TPACPI_LIFE_EXITING;
6229
6230         list_for_each_entry_safe_reverse(ibm, itmp,
6231                                          &tpacpi_all_drivers,
6232                                          all_drivers) {
6233                 ibm_exit(ibm);
6234         }
6235
6236         dbg_printk(TPACPI_DBG_INIT, "finished subdriver exit path...\n");
6237
6238         if (tpacpi_inputdev) {
6239                 if (tp_features.input_device_registered)
6240                         input_unregister_device(tpacpi_inputdev);
6241                 else
6242                         input_free_device(tpacpi_inputdev);
6243         }
6244
6245         if (tpacpi_hwmon)
6246                 hwmon_device_unregister(tpacpi_hwmon);
6247
6248         if (tp_features.sensors_pdev_attrs_registered)
6249                 device_remove_file(&tpacpi_sensors_pdev->dev,
6250                                    &dev_attr_thinkpad_acpi_pdev_name);
6251         if (tpacpi_sensors_pdev)
6252                 platform_device_unregister(tpacpi_sensors_pdev);
6253         if (tpacpi_pdev)
6254                 platform_device_unregister(tpacpi_pdev);
6255
6256         if (tp_features.sensors_pdrv_attrs_registered)
6257                 tpacpi_remove_driver_attributes(&tpacpi_hwmon_pdriver.driver);
6258         if (tp_features.platform_drv_attrs_registered)
6259                 tpacpi_remove_driver_attributes(&tpacpi_pdriver.driver);
6260
6261         if (tp_features.sensors_pdrv_registered)
6262                 platform_driver_unregister(&tpacpi_hwmon_pdriver);
6263
6264         if (tp_features.platform_drv_registered)
6265                 platform_driver_unregister(&tpacpi_pdriver);
6266
6267         if (proc_dir)
6268                 remove_proc_entry(IBM_PROC_DIR, acpi_root_dir);
6269
6270         kfree(thinkpad_id.bios_version_str);
6271         kfree(thinkpad_id.ec_version_str);
6272         kfree(thinkpad_id.model_str);
6273 }
6274
6275 module_init(thinkpad_acpi_module_init);
6276 module_exit(thinkpad_acpi_module_exit);