drivers/misc/thinkpad_acpi.h

   1 /*
   2  *  thinkpad_acpi.h - 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 #ifndef __THINKPAD_ACPI_H__
  25 #define __THINKPAD_ACPI_H__
  26
  27 #include <linux/kernel.h>
  28 #include <linux/module.h>
  29 #include <linux/init.h>
  30 #include <linux/types.h>
  31 #include <linux/string.h>
  32 #include <linux/list.h>
  33 #include <linux/mutex.h>
  34
  35 #include <linux/nvram.h>
  36 #include <linux/proc_fs.h>
  37 #include <linux/sysfs.h>
  38 #include <linux/backlight.h>
  39 #include <linux/fb.h>
  40 #include <linux/platform_device.h>
  41 #include <linux/hwmon.h>
  42 #include <linux/hwmon-sysfs.h>
  43 #include <linux/input.h>
  44 #include <asm/uaccess.h>
  45
  46 #include <linux/dmi.h>
  47 #include <linux/jiffies.h>
  48 #include <linux/workqueue.h>
  49
  50 #include <acpi/acpi_drivers.h>
  51 #include <acpi/acnamesp.h>
  52
  53 #include <linux/pci_ids.h>
  54
  55 /****************************************************************************
  56  * Main driver
  57  */
  58
  59 #define IBM_NAME "thinkpad"
  60 #define IBM_DESC "ThinkPad ACPI Extras"
  61 #define IBM_FILE "thinkpad_acpi"
  62 #define IBM_URL "http://ibm-acpi.sf.net/"
  63 #define IBM_MAIL "ibm-acpi-devel@lists.sourceforge.net"
  64
  65 #define IBM_PROC_DIR "ibm"
  66 #define IBM_ACPI_EVENT_PREFIX "ibm"
  67 #define IBM_DRVR_NAME IBM_FILE
  68
  69 #define IBM_LOG IBM_FILE ": "
  70 #define IBM_ERR    KERN_ERR    IBM_LOG
  71 #define IBM_NOTICE KERN_NOTICE IBM_LOG
  72 #define IBM_INFO   KERN_INFO   IBM_LOG
  73 #define IBM_DEBUG  KERN_DEBUG  IBM_LOG
  74
  75 #define IBM_MAX_ACPI_ARGS 3
  76
  77 /* ThinkPad CMOS commands */
  78 #define TP_CMOS_VOLUME_DOWN     0
  79 #define TP_CMOS_VOLUME_UP       1
  80 #define TP_CMOS_VOLUME_MUTE     2
  81 #define TP_CMOS_BRIGHTNESS_UP   4
  82 #define TP_CMOS_BRIGHTNESS_DOWN 5
  83
  84 /* ThinkPad CMOS NVRAM constants */
  85 #define TP_NVRAM_ADDR_BRIGHTNESS       0x5e
  86 #define TP_NVRAM_MASK_LEVEL_BRIGHTNESS 0x07
  87 #define TP_NVRAM_POS_LEVEL_BRIGHTNESS 0
  88
  89 #define onoff(status,bit) ((status) & (1 << (bit)) ? "on" : "off")
  90 #define enabled(status,bit) ((status) & (1 << (bit)) ? "enabled" : "disabled")
  91 #define strlencmp(a,b) (strncmp((a), (b), strlen(b)))
  92
  93 /* Debugging */
  94 #define TPACPI_DBG_ALL          0xffff
  95 #define TPACPI_DBG_ALL          0xffff
  96 #define TPACPI_DBG_INIT         0x0001
  97 #define TPACPI_DBG_EXIT         0x0002
  98 #define dbg_printk(a_dbg_level, format, arg...) \
  99         do { if (dbg_level & a_dbg_level) \
 100                 printk(IBM_DEBUG "%s: " format, __func__ , ## arg); } while (0)
 101 #ifdef CONFIG_THINKPAD_ACPI_DEBUG
 102 #define vdbg_printk(a_dbg_level, format, arg...) \
 103         dbg_printk(a_dbg_level, format, ## arg)
 104 static const char *str_supported(int is_supported);
 105 #else
 106 #define vdbg_printk(a_dbg_level, format, arg...)
 107 #endif
 108
 109 /* Input IDs */
 110 #define TPACPI_HKEY_INPUT_VENDOR        PCI_VENDOR_ID_IBM
 111 #define TPACPI_HKEY_INPUT_PRODUCT       0x5054 /* "TP" */
 112 #define TPACPI_HKEY_INPUT_VERSION       0x4101
 113
 114 /* ACPI HIDs */
 115 #define IBM_HKEY_HID    "IBM0068"
 116
 117 /* ACPI helpers */
 118 static int __must_check acpi_evalf(acpi_handle handle,
 119                       void *res, char *method, char *fmt, ...);
 120 static int __must_check acpi_ec_read(int i, u8 * p);
 121 static int __must_check acpi_ec_write(int i, u8 v);
 122 static int __must_check _sta(acpi_handle handle);
 123
 124 /* ACPI handles */
 125 static acpi_handle root_handle;                 /* root namespace */
 126 static acpi_handle ec_handle;                   /* EC */
 127 static acpi_handle ecrd_handle, ecwr_handle;    /* 570 EC access */
 128 static acpi_handle cmos_handle, hkey_handle;    /* basic thinkpad handles */
 129
 130 static void drv_acpi_handle_init(char *name,
 131                    acpi_handle *handle, acpi_handle parent,
 132                    char **paths, int num_paths, char **path);
 133 #define IBM_ACPIHANDLE_INIT(object)                                             \
 134         drv_acpi_handle_init(#object, &object##_handle, *object##_parent,       \
 135                 object##_paths, ARRAY_SIZE(object##_paths), &object##_path)
 136
 137 /* ThinkPad ACPI helpers */
 138 static int issue_thinkpad_cmos_command(int cmos_cmd);
 139
 140 /* procfs support */
 141 static struct proc_dir_entry *proc_dir;
 142
 143 /* procfs helpers */
 144 static int dispatch_procfs_read(char *page, char **start, off_t off,
 145                 int count, int *eof, void *data);
 146 static int dispatch_procfs_write(struct file *file,
 147                 const char __user * userbuf,
 148                 unsigned long count, void *data);
 149 static char *next_cmd(char **cmds);
 150
 151 /* sysfs support */
 152 struct attribute_set {
 153         unsigned int members, max_members;
 154         struct attribute_group group;
 155 };
 156
 157 static struct attribute_set *create_attr_set(unsigned int max_members,
 158                                                 const char* name);
 159 #define destroy_attr_set(_set) \
 160         kfree(_set);
 161 static int add_to_attr_set(struct attribute_set* s, struct attribute *attr);
 162 static int add_many_to_attr_set(struct attribute_set* s,
 163                         struct attribute **attr,
 164                         unsigned int count);
 165 #define register_attr_set_with_sysfs(_attr_set, _kobj) \
 166         sysfs_create_group(_kobj, &_attr_set->group)
 167 static void delete_attr_set(struct attribute_set* s, struct kobject *kobj);
 168
 169 static int parse_strtoul(const char *buf, unsigned long max,
 170                         unsigned long *value);
 171
 172 /* Device model */
 173 static struct platform_device *tpacpi_pdev;
 174 static struct device *tpacpi_hwmon;
 175 static struct platform_driver tpacpi_pdriver;
 176 static struct input_dev *tpacpi_inputdev;
 177 static int tpacpi_create_driver_attributes(struct device_driver *drv);
 178 static void tpacpi_remove_driver_attributes(struct device_driver *drv);
 179
 180 /* Module */
 181 static int experimental;
 182 static u32 dbg_level;
 183 static int force_load;
 184 static unsigned int hotkey_report_mode;
 185
 186 static int thinkpad_acpi_module_init(void);
 187 static void thinkpad_acpi_module_exit(void);
 188
 189
 190 /****************************************************************************
 191  * Subdrivers
 192  */
 193
 194 struct ibm_struct;
 195
 196 struct tp_acpi_drv_struct {
 197         const struct acpi_device_id *hid;
 198         struct acpi_driver *driver;
 199
 200         void (*notify) (struct ibm_struct *, u32);
 201         acpi_handle *handle;
 202         u32 type;
 203         struct acpi_device *device;
 204 };
 205
 206 struct ibm_struct {
 207         char *name;
 208
 209         int (*read) (char *);
 210         int (*write) (char *);
 211         void (*exit) (void);
 212         void (*resume) (void);
 213
 214         struct list_head all_drivers;
 215
 216         struct tp_acpi_drv_struct *acpi;
 217
 218         struct {
 219                 u8 acpi_driver_registered:1;
 220                 u8 acpi_notify_installed:1;
 221                 u8 proc_created:1;
 222                 u8 init_called:1;
 223                 u8 experimental:1;
 224         } flags;
 225 };
 226
 227 struct ibm_init_struct {
 228         char param[32];
 229
 230         int (*init) (struct ibm_init_struct *);
 231         struct ibm_struct *data;
 232 };
 233
 234 static struct {
 235 #ifdef CONFIG_THINKPAD_ACPI_BAY
 236         u16 bay_status:1;
 237         u16 bay_eject:1;
 238         u16 bay_status2:1;
 239         u16 bay_eject2:1;
 240 #endif
 241         u16 bluetooth:1;
 242         u16 hotkey:1;
 243         u16 hotkey_mask:1;
 244         u16 hotkey_wlsw:1;
 245         u16 light:1;
 246         u16 light_status:1;
 247         u16 wan:1;
 248         u16 fan_ctrl_status_undef:1;
 249         u16 input_device_registered:1;
 250         u16 platform_drv_registered:1;
 251         u16 platform_drv_attrs_registered:1;
 252 } tp_features;
 253
 254 struct thinkpad_id_data {
 255         unsigned int vendor;    /* ThinkPad vendor:
 256                                  * PCI_VENDOR_ID_IBM/PCI_VENDOR_ID_LENOVO */
 257
 258         char *bios_version_str; /* Something like 1ZET51WW (1.03z) */
 259         char *ec_version_str;   /* Something like 1ZHT51WW-1.04a */
 260
 261         u16 bios_model;         /* Big Endian, TP-1Y = 0x5931, 0 = unknown */
 262         u16 ec_model;
 263
 264         char *model_str;
 265 };
 266
 267 static struct thinkpad_id_data thinkpad_id;
 268
 269 static struct list_head tpacpi_all_drivers;
 270
 271 static struct ibm_init_struct ibms_init[];
 272 static int set_ibm_param(const char *val, struct kernel_param *kp);
 273 static int ibm_init(struct ibm_init_struct *iibm);
 274 static void ibm_exit(struct ibm_struct *ibm);
 275
 276
 277 /*
 278  * procfs master subdriver
 279  */
 280 static int thinkpad_acpi_driver_init(struct ibm_init_struct *iibm);
 281 static int thinkpad_acpi_driver_read(char *p);
 282
 283
 284 /*
 285  * Bay subdriver
 286  */
 287
 288 #ifdef CONFIG_THINKPAD_ACPI_BAY
 289 static acpi_handle bay_handle, bay_ej_handle;
 290 static acpi_handle bay2_handle, bay2_ej_handle;
 291
 292 static int bay_init(struct ibm_init_struct *iibm);
 293 static void bay_notify(struct ibm_struct *ibm, u32 event);
 294 static int bay_read(char *p);
 295 static int bay_write(char *buf);
 296 #endif /* CONFIG_THINKPAD_ACPI_BAY */
 297
 298
 299 /*
 300  * Beep subdriver
 301  */
 302
 303 static acpi_handle beep_handle;
 304
 305 static int beep_read(char *p);
 306 static int beep_write(char *buf);
 307
 308
 309 /*
 310  * Bluetooth subdriver
 311  */
 312
 313 enum {
 314         /* ACPI GBDC/SBDC bits */
 315         TP_ACPI_BLUETOOTH_HWPRESENT     = 0x01, /* Bluetooth hw available */
 316         TP_ACPI_BLUETOOTH_RADIOSSW      = 0x02, /* Bluetooth radio enabled */
 317         TP_ACPI_BLUETOOTH_UNK           = 0x04, /* unknown function */
 318 };
 319
 320 static int bluetooth_init(struct ibm_init_struct *iibm);
 321 static int bluetooth_get_radiosw(void);
 322 static int bluetooth_set_radiosw(int radio_on);
 323 static int bluetooth_read(char *p);
 324 static int bluetooth_write(char *buf);
 325
 326
 327 /*
 328  * Brightness (backlight) subdriver
 329  */
 330
 331 #define TPACPI_BACKLIGHT_DEV_NAME "thinkpad_screen"
 332
 333 static struct backlight_device *ibm_backlight_device;
 334 static int brightness_offset = 0x31;
 335 static int brightness_mode;
 336
 337 static int brightness_init(struct ibm_init_struct *iibm);
 338 static void brightness_exit(void);
 339 static int brightness_get(struct backlight_device *bd);
 340 static int brightness_set(int value);
 341 static int brightness_update_status(struct backlight_device *bd);
 342 static int brightness_read(char *p);
 343 static int brightness_write(char *buf);
 344
 345
 346 /*
 347  * CMOS subdriver
 348  */
 349
 350 static int cmos_read(char *p);
 351 static int cmos_write(char *buf);
 352
 353
 354 /*
 355  * Dock subdriver
 356  */
 357
 358 #ifdef CONFIG_THINKPAD_ACPI_DOCK
 359 static acpi_handle pci_handle;
 360 static acpi_handle dock_handle;
 361
 362 static void dock_notify(struct ibm_struct *ibm, u32 event);
 363 static int dock_read(char *p);
 364 static int dock_write(char *buf);
 365 #endif /* CONFIG_THINKPAD_ACPI_DOCK */
 366
 367
 368 /*
 369  * EC dump subdriver
 370  */
 371
 372 static int ecdump_read(char *p) ;
 373 static int ecdump_write(char *buf);
 374
 375
 376 /*
 377  * Fan subdriver
 378  */
 379
 380 enum {                                  /* Fan control constants */
 381         fan_status_offset = 0x2f,       /* EC register 0x2f */
 382         fan_rpm_offset = 0x84,          /* EC register 0x84: LSB, 0x85 MSB (RPM)
 383                                          * 0x84 must be read before 0x85 */
 384
 385         TP_EC_FAN_FULLSPEED = 0x40,     /* EC fan mode: full speed */
 386         TP_EC_FAN_AUTO      = 0x80,     /* EC fan mode: auto fan control */
 387
 388         TPACPI_FAN_LAST_LEVEL = 0x100,  /* Use cached last-seen fan level */
 389 };
 390
 391 enum fan_status_access_mode {
 392         TPACPI_FAN_NONE = 0,            /* No fan status or control */
 393         TPACPI_FAN_RD_ACPI_GFAN,        /* Use ACPI GFAN */
 394         TPACPI_FAN_RD_TPEC,             /* Use ACPI EC regs 0x2f, 0x84-0x85 */
 395 };
 396
 397 enum fan_control_access_mode {
 398         TPACPI_FAN_WR_NONE = 0,         /* No fan control */
 399         TPACPI_FAN_WR_ACPI_SFAN,        /* Use ACPI SFAN */
 400         TPACPI_FAN_WR_TPEC,             /* Use ACPI EC reg 0x2f */
 401         TPACPI_FAN_WR_ACPI_FANS,        /* Use ACPI FANS and EC reg 0x2f */
 402 };
 403
 404 enum fan_control_commands {
 405         TPACPI_FAN_CMD_SPEED    = 0x0001,       /* speed command */
 406         TPACPI_FAN_CMD_LEVEL    = 0x0002,       /* level command  */
 407         TPACPI_FAN_CMD_ENABLE   = 0x0004,       /* enable/disable cmd,
 408                                                  * and also watchdog cmd */
 409 };
 410
 411 static int fan_control_allowed;
 412
 413 static enum fan_status_access_mode fan_status_access_mode;
 414 static enum fan_control_access_mode fan_control_access_mode;
 415 static enum fan_control_commands fan_control_commands;
 416 static u8 fan_control_initial_status;
 417 static u8 fan_control_desired_level;
 418 static int fan_watchdog_maxinterval;
 419
 420 static struct mutex fan_mutex;
 421
 422 static acpi_handle fans_handle, gfan_handle, sfan_handle;
 423
 424 static int fan_init(struct ibm_init_struct *iibm);
 425 static void fan_exit(void);
 426 static int fan_get_status(u8 *status);
 427 static int fan_get_status_safe(u8 *status);
 428 static int fan_get_speed(unsigned int *speed);
 429 static void fan_update_desired_level(u8 status);
 430 static void fan_watchdog_fire(struct work_struct *ignored);
 431 static void fan_watchdog_reset(void);
 432 static int fan_set_level(int level);
 433 static int fan_set_level_safe(int level);
 434 static int fan_set_enable(void);
 435 static int fan_set_disable(void);
 436 static int fan_set_speed(int speed);
 437 static int fan_read(char *p);
 438 static int fan_write(char *buf);
 439 static int fan_write_cmd_level(const char *cmd, int *rc);
 440 static int fan_write_cmd_enable(const char *cmd, int *rc);
 441 static int fan_write_cmd_disable(const char *cmd, int *rc);
 442 static int fan_write_cmd_speed(const char *cmd, int *rc);
 443 static int fan_write_cmd_watchdog(const char *cmd, int *rc);
 444
 445
 446 /*
 447  * Hotkey subdriver
 448  */
 449
 450 static int hotkey_orig_status;
 451 static u32 hotkey_orig_mask;
 452
 453 static struct mutex hotkey_mutex;
 454
 455 static int hotkey_init(struct ibm_init_struct *iibm);
 456 static void hotkey_exit(void);
 457 static int hotkey_get(int *status, u32 *mask);
 458 static int hotkey_set(int status, u32 mask);
 459 static void hotkey_notify(struct ibm_struct *ibm, u32 event);
 460 static int hotkey_read(char *p);
 461 static int hotkey_write(char *buf);
 462
 463
 464 /*
 465  * LED subdriver
 466  */
 467
 468 enum led_access_mode {
 469         TPACPI_LED_NONE = 0,
 470         TPACPI_LED_570, /* 570 */
 471         TPACPI_LED_OLD, /* 600e/x, 770e, 770x, A21e, A2xm/p, T20-22, X20-21 */
 472         TPACPI_LED_NEW, /* all others */
 473 };
 474
 475 enum {  /* For TPACPI_LED_OLD */
 476         TPACPI_LED_EC_HLCL = 0x0c,      /* EC reg to get led to power on */
 477         TPACPI_LED_EC_HLBL = 0x0d,      /* EC reg to blink a lit led */
 478         TPACPI_LED_EC_HLMS = 0x0e,      /* EC reg to select led to command */
 479 };
 480
 481 static enum led_access_mode led_supported;
 482 static acpi_handle led_handle;
 483
 484 static int led_init(struct ibm_init_struct *iibm);
 485 static int led_read(char *p);
 486 static int led_write(char *buf);
 487
 488 /*
 489  * Light (thinklight) subdriver
 490  */
 491
 492 static acpi_handle lght_handle, ledb_handle;
 493
 494 static int light_init(struct ibm_init_struct *iibm);
 495 static int light_read(char *p);
 496 static int light_write(char *buf);
 497
 498
 499 /*
 500  * Thermal subdriver
 501  */
 502
 503 enum thermal_access_mode {
 504         TPACPI_THERMAL_NONE = 0,        /* No thermal support */
 505         TPACPI_THERMAL_ACPI_TMP07,      /* Use ACPI TMP0-7 */
 506         TPACPI_THERMAL_ACPI_UPDT,       /* Use ACPI TMP0-7 with UPDT */
 507         TPACPI_THERMAL_TPEC_8,          /* Use ACPI EC regs, 8 sensors */
 508         TPACPI_THERMAL_TPEC_16,         /* Use ACPI EC regs, 16 sensors */
 509 };
 510
 511 enum { /* TPACPI_THERMAL_TPEC_* */
 512         TP_EC_THERMAL_TMP0 = 0x78,      /* ACPI EC regs TMP 0..7 */
 513         TP_EC_THERMAL_TMP8 = 0xC0,      /* ACPI EC regs TMP 8..15 */
 514         TP_EC_THERMAL_TMP_NA = -128,    /* ACPI EC sensor not available */
 515 };
 516
 517 #define TPACPI_MAX_THERMAL_SENSORS 16   /* Max thermal sensors supported */
 518 struct ibm_thermal_sensors_struct {
 519         s32 temp[TPACPI_MAX_THERMAL_SENSORS];
 520 };
 521
 522 static enum thermal_access_mode thermal_read_mode;
 523
 524 static int thermal_init(struct ibm_init_struct *iibm);
 525 static int thermal_get_sensor(int idx, s32 *value);
 526 static int thermal_get_sensors(struct ibm_thermal_sensors_struct *s);
 527 static int thermal_read(char *p);
 528
 529
 530 /*
 531  * Video subdriver
 532  */
 533
 534 enum video_access_mode {
 535         TPACPI_VIDEO_NONE = 0,
 536         TPACPI_VIDEO_570,       /* 570 */
 537         TPACPI_VIDEO_770,       /* 600e/x, 770e, 770x */
 538         TPACPI_VIDEO_NEW,       /* all others */
 539 };
 540
 541 enum {  /* video status flags, based on VIDEO_570 */
 542         TP_ACPI_VIDEO_S_LCD = 0x01,     /* LCD output enabled */
 543         TP_ACPI_VIDEO_S_CRT = 0x02,     /* CRT output enabled */
 544         TP_ACPI_VIDEO_S_DVI = 0x08,     /* DVI output enabled */
 545 };
 546
 547 enum {  /* TPACPI_VIDEO_570 constants */
 548         TP_ACPI_VIDEO_570_PHSCMD = 0x87,        /* unknown magic constant :( */
 549         TP_ACPI_VIDEO_570_PHSMASK = 0x03,       /* PHS bits that map to
 550                                                  * video_status_flags */
 551         TP_ACPI_VIDEO_570_PHS2CMD = 0x8b,       /* unknown magic constant :( */
 552         TP_ACPI_VIDEO_570_PHS2SET = 0x80,       /* unknown magic constant :( */
 553 };
 554
 555 static enum video_access_mode video_supported;
 556 static int video_orig_autosw;
 557 static acpi_handle vid_handle, vid2_handle;
 558
 559 static int video_init(struct ibm_init_struct *iibm);
 560 static void video_exit(void);
 561 static int video_outputsw_get(void);
 562 static int video_outputsw_set(int status);
 563 static int video_autosw_get(void);
 564 static int video_autosw_set(int enable);
 565 static int video_outputsw_cycle(void);
 566 static int video_expand_toggle(void);
 567 static int video_read(char *p);
 568 static int video_write(char *buf);
 569
 570
 571 /*
 572  * Volume subdriver
 573  */
 574
 575 static int volume_offset = 0x30;
 576
 577 static int volume_read(char *p);
 578 static int volume_write(char *buf);
 579
 580
 581 /*
 582  * Wan subdriver
 583  */
 584
 585 enum {
 586         /* ACPI GWAN/SWAN bits */
 587         TP_ACPI_WANCARD_HWPRESENT       = 0x01, /* Wan hw available */
 588         TP_ACPI_WANCARD_RADIOSSW        = 0x02, /* Wan radio enabled */
 589         TP_ACPI_WANCARD_UNK             = 0x04, /* unknown function */
 590 };
 591
 592 static int wan_init(struct ibm_init_struct *iibm);
 593 static int wan_get_radiosw(void);
 594 static int wan_set_radiosw(int radio_on);
 595 static int wan_read(char *p);
 596 static int wan_write(char *buf);
 597
 598
 599 #endif /* __THINKPAD_ACPI_H */