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 IBM_NAME "_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 #define IBM_HWMON_DRVR_NAME IBM_NAME "_hwmon"
  69
  70 #define IBM_LOG IBM_FILE ": "
  71 #define IBM_ERR    KERN_ERR    IBM_LOG
  72 #define IBM_NOTICE KERN_NOTICE IBM_LOG
  73 #define IBM_INFO   KERN_INFO   IBM_LOG
  74 #define IBM_DEBUG  KERN_DEBUG  IBM_LOG
  75
  76 #define IBM_MAX_ACPI_ARGS 3
  77
  78 /* ThinkPad CMOS commands */
  79 #define TP_CMOS_VOLUME_DOWN     0
  80 #define TP_CMOS_VOLUME_UP       1
  81 #define TP_CMOS_VOLUME_MUTE     2
  82 #define TP_CMOS_BRIGHTNESS_UP   4
  83 #define TP_CMOS_BRIGHTNESS_DOWN 5
  84
  85 /* ThinkPad CMOS NVRAM constants */
  86 #define TP_NVRAM_ADDR_BRIGHTNESS       0x5e
  87 #define TP_NVRAM_MASK_LEVEL_BRIGHTNESS 0x0f
  88 #define TP_NVRAM_POS_LEVEL_BRIGHTNESS 0
  89
  90 #define onoff(status,bit) ((status) & (1 << (bit)) ? "on" : "off")
  91 #define enabled(status,bit) ((status) & (1 << (bit)) ? "enabled" : "disabled")
  92 #define strlencmp(a,b) (strncmp((a), (b), strlen(b)))
  93
  94 /* Debugging */
  95 #define TPACPI_DBG_ALL          0xffff
  96 #define TPACPI_DBG_ALL          0xffff
  97 #define TPACPI_DBG_INIT         0x0001
  98 #define TPACPI_DBG_EXIT         0x0002
  99 #define dbg_printk(a_dbg_level, format, arg...) \
 100         do { if (dbg_level & a_dbg_level) \
 101                 printk(IBM_DEBUG "%s: " format, __func__ , ## arg); } while (0)
 102 #ifdef CONFIG_THINKPAD_ACPI_DEBUG
 103 #define vdbg_printk(a_dbg_level, format, arg...) \
 104         dbg_printk(a_dbg_level, format, ## arg)
 105 static const char *str_supported(int is_supported);
 106 #else
 107 #define vdbg_printk(a_dbg_level, format, arg...)
 108 #endif
 109
 110 /* Input IDs */
 111 #define TPACPI_HKEY_INPUT_VENDOR        PCI_VENDOR_ID_IBM
 112 #define TPACPI_HKEY_INPUT_PRODUCT       0x5054 /* "TP" */
 113 #define TPACPI_HKEY_INPUT_VERSION       0x4101
 114
 115 /* ACPI HIDs */
 116 #define IBM_HKEY_HID    "IBM0068"
 117
 118 /* ACPI helpers */
 119 static int __must_check acpi_evalf(acpi_handle handle,
 120                       void *res, char *method, char *fmt, ...);
 121 static int __must_check acpi_ec_read(int i, u8 * p);
 122 static int __must_check acpi_ec_write(int i, u8 v);
 123 static int __must_check _sta(acpi_handle handle);
 124
 125 /* ACPI handles */
 126 static acpi_handle root_handle;                 /* root namespace */
 127 static acpi_handle ec_handle;                   /* EC */
 128 static acpi_handle ecrd_handle, ecwr_handle;    /* 570 EC access */
 129 static acpi_handle cmos_handle, hkey_handle;    /* basic thinkpad handles */
 130
 131 static void drv_acpi_handle_init(char *name,
 132                    acpi_handle *handle, acpi_handle parent,
 133                    char **paths, int num_paths, char **path);
 134 #define IBM_ACPIHANDLE_INIT(object)                                             \
 135         drv_acpi_handle_init(#object, &object##_handle, *object##_parent,       \
 136                 object##_paths, ARRAY_SIZE(object##_paths), &object##_path)
 137
 138 /* ThinkPad ACPI helpers */
 139 static int issue_thinkpad_cmos_command(int cmos_cmd);
 140
 141 /* procfs support */
 142 static struct proc_dir_entry *proc_dir;
 143
 144 /* procfs helpers */
 145 static int dispatch_procfs_read(char *page, char **start, off_t off,
 146                 int count, int *eof, void *data);
 147 static int dispatch_procfs_write(struct file *file,
 148                 const char __user * userbuf,
 149                 unsigned long count, void *data);
 150 static char *next_cmd(char **cmds);
 151
 152 /* sysfs support */
 153 struct attribute_set {
 154         unsigned int members, max_members;
 155         struct attribute_group group;
 156 };
 157
 158 static struct attribute_set *create_attr_set(unsigned int max_members,
 159                                                 const char* name);
 160 #define destroy_attr_set(_set) \
 161         kfree(_set);
 162 static int add_to_attr_set(struct attribute_set* s, struct attribute *attr);
 163 static int add_many_to_attr_set(struct attribute_set* s,
 164                         struct attribute **attr,
 165                         unsigned int count);
 166 #define register_attr_set_with_sysfs(_attr_set, _kobj) \
 167         sysfs_create_group(_kobj, &_attr_set->group)
 168 static void delete_attr_set(struct attribute_set* s, struct kobject *kobj);
 169
 170 static int parse_strtoul(const char *buf, unsigned long max,
 171                         unsigned long *value);
 172
 173 /* Device model */
 174 static struct platform_device *tpacpi_pdev;
 175 static struct platform_device *tpacpi_sensors_pdev;
 176 static struct class_device *tpacpi_hwmon;
 177 static struct platform_driver tpacpi_pdriver;
 178 static struct input_dev *tpacpi_inputdev;
 179 static int tpacpi_create_driver_attributes(struct device_driver *drv);
 180 static void tpacpi_remove_driver_attributes(struct device_driver *drv);
 181
 182 /* Module */
 183 static int experimental;
 184 static u32 dbg_level;
 185 static int force_load;
 186 static unsigned int hotkey_report_mode;
 187
 188 static int thinkpad_acpi_module_init(void);
 189 static void thinkpad_acpi_module_exit(void);
 190
 191
 192 /****************************************************************************
 193  * Subdrivers
 194  */
 195
 196 struct ibm_struct;
 197
 198 struct tp_acpi_drv_struct {
 199         const struct acpi_device_id *hid;
 200         struct acpi_driver *driver;
 201
 202         void (*notify) (struct ibm_struct *, u32);
 203         acpi_handle *handle;
 204         u32 type;
 205         struct acpi_device *device;
 206 };
 207
 208 struct ibm_struct {
 209         char *name;
 210
 211         int (*read) (char *);
 212         int (*write) (char *);
 213         void (*exit) (void);
 214         void (*resume) (void);
 215
 216         struct list_head all_drivers;
 217
 218         struct tp_acpi_drv_struct *acpi;
 219
 220         struct {
 221                 u8 acpi_driver_registered:1;
 222                 u8 acpi_notify_installed:1;
 223                 u8 proc_created:1;
 224                 u8 init_called:1;
 225                 u8 experimental:1;
 226         } flags;
 227 };
 228
 229 struct ibm_init_struct {
 230         char param[32];
 231
 232         int (*init) (struct ibm_init_struct *);
 233         struct ibm_struct *data;
 234 };
 235
 236 static struct {
 237 #ifdef CONFIG_THINKPAD_ACPI_BAY
 238         u32 bay_status:1;
 239         u32 bay_eject:1;
 240         u32 bay_status2:1;
 241         u32 bay_eject2:1;
 242 #endif
 243         u32 bluetooth:1;
 244         u32 hotkey:1;
 245         u32 hotkey_mask:1;
 246         u32 hotkey_wlsw:1;
 247         u32 light:1;
 248         u32 light_status:1;
 249         u32 bright_16levels:1;
 250         u32 wan:1;
 251         u32 fan_ctrl_status_undef:1;
 252         u32 input_device_registered:1;
 253         u32 platform_drv_registered:1;
 254         u32 platform_drv_attrs_registered:1;
 255         u32 sensors_pdrv_registered:1;
 256         u32 sensors_pdrv_attrs_registered:1;
 257         u32 sensors_pdev_attrs_registered:1;
 258 } tp_features;
 259
 260 struct thinkpad_id_data {
 261         unsigned int vendor;    /* ThinkPad vendor:
 262                                  * PCI_VENDOR_ID_IBM/PCI_VENDOR_ID_LENOVO */
 263
 264         char *bios_version_str; /* Something like 1ZET51WW (1.03z) */
 265         char *ec_version_str;   /* Something like 1ZHT51WW-1.04a */
 266
 267         u16 bios_model;         /* Big Endian, TP-1Y = 0x5931, 0 = unknown */
 268         u16 ec_model;
 269
 270         char *model_str;
 271 };
 272
 273 static struct thinkpad_id_data thinkpad_id;
 274
 275 static struct list_head tpacpi_all_drivers;
 276
 277 static struct ibm_init_struct ibms_init[];
 278 static int set_ibm_param(const char *val, struct kernel_param *kp);
 279 static int ibm_init(struct ibm_init_struct *iibm);
 280 static void ibm_exit(struct ibm_struct *ibm);
 281
 282
 283 /*
 284  * procfs master subdriver
 285  */
 286 static int thinkpad_acpi_driver_init(struct ibm_init_struct *iibm);
 287 static int thinkpad_acpi_driver_read(char *p);
 288
 289
 290 /*
 291  * Bay subdriver
 292  */
 293
 294 #ifdef CONFIG_THINKPAD_ACPI_BAY
 295 static acpi_handle bay_handle, bay_ej_handle;
 296 static acpi_handle bay2_handle, bay2_ej_handle;
 297
 298 static int bay_init(struct ibm_init_struct *iibm);
 299 static void bay_notify(struct ibm_struct *ibm, u32 event);
 300 static int bay_read(char *p);
 301 static int bay_write(char *buf);
 302 #endif /* CONFIG_THINKPAD_ACPI_BAY */
 303
 304
 305 /*
 306  * Beep subdriver
 307  */
 308
 309 static acpi_handle beep_handle;
 310
 311 static int beep_read(char *p);
 312 static int beep_write(char *buf);
 313
 314
 315 /*
 316  * Bluetooth subdriver
 317  */
 318
 319 enum {
 320         /* ACPI GBDC/SBDC bits */
 321         TP_ACPI_BLUETOOTH_HWPRESENT     = 0x01, /* Bluetooth hw available */
 322         TP_ACPI_BLUETOOTH_RADIOSSW      = 0x02, /* Bluetooth radio enabled */
 323         TP_ACPI_BLUETOOTH_UNK           = 0x04, /* unknown function */
 324 };
 325
 326 static int bluetooth_init(struct ibm_init_struct *iibm);
 327 static int bluetooth_get_radiosw(void);
 328 static int bluetooth_set_radiosw(int radio_on);
 329 static int bluetooth_read(char *p);
 330 static int bluetooth_write(char *buf);
 331
 332
 333 /*
 334  * Brightness (backlight) subdriver
 335  */
 336
 337 #define TPACPI_BACKLIGHT_DEV_NAME "thinkpad_screen"
 338
 339 static struct backlight_device *ibm_backlight_device;
 340 static int brightness_offset = 0x31;
 341 static int brightness_mode;
 342 static unsigned int brightness_enable;  /* 0 = no, 1 = yes, 2 = auto */
 343
 344 static int brightness_init(struct ibm_init_struct *iibm);
 345 static void brightness_exit(void);
 346 static int brightness_get(struct backlight_device *bd);
 347 static int brightness_set(int value);
 348 static int brightness_update_status(struct backlight_device *bd);
 349 static int brightness_read(char *p);
 350 static int brightness_write(char *buf);
 351
 352
 353 /*
 354  * CMOS subdriver
 355  */
 356
 357 static int cmos_read(char *p);
 358 static int cmos_write(char *buf);
 359
 360
 361 /*
 362  * Dock subdriver
 363  */
 364
 365 #ifdef CONFIG_THINKPAD_ACPI_DOCK
 366 static acpi_handle pci_handle;
 367 static acpi_handle dock_handle;
 368
 369 static void dock_notify(struct ibm_struct *ibm, u32 event);
 370 static int dock_read(char *p);
 371 static int dock_write(char *buf);
 372 #endif /* CONFIG_THINKPAD_ACPI_DOCK */
 373
 374
 375 /*
 376  * EC dump subdriver
 377  */
 378
 379 static int ecdump_read(char *p) ;
 380 static int ecdump_write(char *buf);
 381
 382
 383 /*
 384  * Fan subdriver
 385  */
 386
 387 enum {                                  /* Fan control constants */
 388         fan_status_offset = 0x2f,       /* EC register 0x2f */
 389         fan_rpm_offset = 0x84,          /* EC register 0x84: LSB, 0x85 MSB (RPM)
 390                                          * 0x84 must be read before 0x85 */
 391
 392         TP_EC_FAN_FULLSPEED = 0x40,     /* EC fan mode: full speed */
 393         TP_EC_FAN_AUTO      = 0x80,     /* EC fan mode: auto fan control */
 394
 395         TPACPI_FAN_LAST_LEVEL = 0x100,  /* Use cached last-seen fan level */
 396 };
 397
 398 enum fan_status_access_mode {
 399         TPACPI_FAN_NONE = 0,            /* No fan status or control */
 400         TPACPI_FAN_RD_ACPI_GFAN,        /* Use ACPI GFAN */
 401         TPACPI_FAN_RD_TPEC,             /* Use ACPI EC regs 0x2f, 0x84-0x85 */
 402 };
 403
 404 enum fan_control_access_mode {
 405         TPACPI_FAN_WR_NONE = 0,         /* No fan control */
 406         TPACPI_FAN_WR_ACPI_SFAN,        /* Use ACPI SFAN */
 407         TPACPI_FAN_WR_TPEC,             /* Use ACPI EC reg 0x2f */
 408         TPACPI_FAN_WR_ACPI_FANS,        /* Use ACPI FANS and EC reg 0x2f */
 409 };
 410
 411 enum fan_control_commands {
 412         TPACPI_FAN_CMD_SPEED    = 0x0001,       /* speed command */
 413         TPACPI_FAN_CMD_LEVEL    = 0x0002,       /* level command  */
 414         TPACPI_FAN_CMD_ENABLE   = 0x0004,       /* enable/disable cmd,
 415                                                  * and also watchdog cmd */
 416 };
 417
 418 static int fan_control_allowed;
 419
 420 static enum fan_status_access_mode fan_status_access_mode;
 421 static enum fan_control_access_mode fan_control_access_mode;
 422 static enum fan_control_commands fan_control_commands;
 423 static u8 fan_control_initial_status;
 424 static u8 fan_control_desired_level;
 425 static int fan_watchdog_maxinterval;
 426
 427 static struct mutex fan_mutex;
 428
 429 static acpi_handle fans_handle, gfan_handle, sfan_handle;
 430
 431 static int fan_init(struct ibm_init_struct *iibm);
 432 static void fan_exit(void);
 433 static int fan_get_status(u8 *status);
 434 static int fan_get_status_safe(u8 *status);
 435 static int fan_get_speed(unsigned int *speed);
 436 static void fan_update_desired_level(u8 status);
 437 static void fan_watchdog_fire(struct work_struct *ignored);
 438 static void fan_watchdog_reset(void);
 439 static int fan_set_level(int level);
 440 static int fan_set_level_safe(int level);
 441 static int fan_set_enable(void);
 442 static int fan_set_disable(void);
 443 static int fan_set_speed(int speed);
 444 static int fan_read(char *p);
 445 static int fan_write(char *buf);
 446 static int fan_write_cmd_level(const char *cmd, int *rc);
 447 static int fan_write_cmd_enable(const char *cmd, int *rc);
 448 static int fan_write_cmd_disable(const char *cmd, int *rc);
 449 static int fan_write_cmd_speed(const char *cmd, int *rc);
 450 static int fan_write_cmd_watchdog(const char *cmd, int *rc);
 451
 452
 453 /*
 454  * Hotkey subdriver
 455  */
 456
 457 static int hotkey_orig_status;
 458 static u32 hotkey_orig_mask;
 459
 460 static struct mutex hotkey_mutex;
 461
 462 static int hotkey_init(struct ibm_init_struct *iibm);
 463 static void hotkey_exit(void);
 464 static int hotkey_get(int *status, u32 *mask);
 465 static int hotkey_set(int status, u32 mask);
 466 static void hotkey_notify(struct ibm_struct *ibm, u32 event);
 467 static int hotkey_read(char *p);
 468 static int hotkey_write(char *buf);
 469
 470
 471 /*
 472  * LED subdriver
 473  */
 474
 475 enum led_access_mode {
 476         TPACPI_LED_NONE = 0,
 477         TPACPI_LED_570, /* 570 */
 478         TPACPI_LED_OLD, /* 600e/x, 770e, 770x, A21e, A2xm/p, T20-22, X20-21 */
 479         TPACPI_LED_NEW, /* all others */
 480 };
 481
 482 enum {  /* For TPACPI_LED_OLD */
 483         TPACPI_LED_EC_HLCL = 0x0c,      /* EC reg to get led to power on */
 484         TPACPI_LED_EC_HLBL = 0x0d,      /* EC reg to blink a lit led */
 485         TPACPI_LED_EC_HLMS = 0x0e,      /* EC reg to select led to command */
 486 };
 487
 488 static enum led_access_mode led_supported;
 489 static acpi_handle led_handle;
 490
 491 static int led_init(struct ibm_init_struct *iibm);
 492 static int led_read(char *p);
 493 static int led_write(char *buf);
 494
 495 /*
 496  * Light (thinklight) subdriver
 497  */
 498
 499 static acpi_handle lght_handle, ledb_handle;
 500
 501 static int light_init(struct ibm_init_struct *iibm);
 502 static int light_read(char *p);
 503 static int light_write(char *buf);
 504
 505
 506 /*
 507  * Thermal subdriver
 508  */
 509
 510 enum thermal_access_mode {
 511         TPACPI_THERMAL_NONE = 0,        /* No thermal support */
 512         TPACPI_THERMAL_ACPI_TMP07,      /* Use ACPI TMP0-7 */
 513         TPACPI_THERMAL_ACPI_UPDT,       /* Use ACPI TMP0-7 with UPDT */
 514         TPACPI_THERMAL_TPEC_8,          /* Use ACPI EC regs, 8 sensors */
 515         TPACPI_THERMAL_TPEC_16,         /* Use ACPI EC regs, 16 sensors */
 516 };
 517
 518 enum { /* TPACPI_THERMAL_TPEC_* */
 519         TP_EC_THERMAL_TMP0 = 0x78,      /* ACPI EC regs TMP 0..7 */
 520         TP_EC_THERMAL_TMP8 = 0xC0,      /* ACPI EC regs TMP 8..15 */
 521         TP_EC_THERMAL_TMP_NA = -128,    /* ACPI EC sensor not available */
 522 };
 523
 524 #define TPACPI_MAX_THERMAL_SENSORS 16   /* Max thermal sensors supported */
 525 struct ibm_thermal_sensors_struct {
 526         s32 temp[TPACPI_MAX_THERMAL_SENSORS];
 527 };
 528
 529 static enum thermal_access_mode thermal_read_mode;
 530
 531 static int thermal_init(struct ibm_init_struct *iibm);
 532 static int thermal_get_sensor(int idx, s32 *value);
 533 static int thermal_get_sensors(struct ibm_thermal_sensors_struct *s);
 534 static int thermal_read(char *p);
 535
 536
 537 /*
 538  * Video subdriver
 539  */
 540
 541 enum video_access_mode {
 542         TPACPI_VIDEO_NONE = 0,
 543         TPACPI_VIDEO_570,       /* 570 */
 544         TPACPI_VIDEO_770,       /* 600e/x, 770e, 770x */
 545         TPACPI_VIDEO_NEW,       /* all others */
 546 };
 547
 548 enum {  /* video status flags, based on VIDEO_570 */
 549         TP_ACPI_VIDEO_S_LCD = 0x01,     /* LCD output enabled */
 550         TP_ACPI_VIDEO_S_CRT = 0x02,     /* CRT output enabled */
 551         TP_ACPI_VIDEO_S_DVI = 0x08,     /* DVI output enabled */
 552 };
 553
 554 enum {  /* TPACPI_VIDEO_570 constants */
 555         TP_ACPI_VIDEO_570_PHSCMD = 0x87,        /* unknown magic constant :( */
 556         TP_ACPI_VIDEO_570_PHSMASK = 0x03,       /* PHS bits that map to
 557                                                  * video_status_flags */
 558         TP_ACPI_VIDEO_570_PHS2CMD = 0x8b,       /* unknown magic constant :( */
 559         TP_ACPI_VIDEO_570_PHS2SET = 0x80,       /* unknown magic constant :( */
 560 };
 561
 562 static enum video_access_mode video_supported;
 563 static int video_orig_autosw;
 564 static acpi_handle vid_handle, vid2_handle;
 565
 566 static int video_init(struct ibm_init_struct *iibm);
 567 static void video_exit(void);
 568 static int video_outputsw_get(void);
 569 static int video_outputsw_set(int status);
 570 static int video_autosw_get(void);
 571 static int video_autosw_set(int enable);
 572 static int video_outputsw_cycle(void);
 573 static int video_expand_toggle(void);
 574 static int video_read(char *p);
 575 static int video_write(char *buf);
 576
 577
 578 /*
 579  * Volume subdriver
 580  */
 581
 582 static int volume_offset = 0x30;
 583
 584 static int volume_read(char *p);
 585 static int volume_write(char *buf);
 586
 587
 588 /*
 589  * Wan subdriver
 590  */
 591
 592 enum {
 593         /* ACPI GWAN/SWAN bits */
 594         TP_ACPI_WANCARD_HWPRESENT       = 0x01, /* Wan hw available */
 595         TP_ACPI_WANCARD_RADIOSSW        = 0x02, /* Wan radio enabled */
 596         TP_ACPI_WANCARD_UNK             = 0x04, /* unknown function */
 597 };
 598
 599 static int wan_init(struct ibm_init_struct *iibm);
 600 static int wan_get_radiosw(void);
 601 static int wan_set_radiosw(int radio_on);
 602 static int wan_read(char *p);
 603 static int wan_write(char *buf);
 604
 605
 606 #endif /* __THINKPAD_ACPI_H */