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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/proc_fs.h>
36#include <linux/sysfs.h>
37#include <linux/backlight.h>
38#include <linux/fb.h>
39#include <linux/platform_device.h>
40#include <linux/hwmon.h>
41#include <linux/hwmon-sysfs.h>
42#include <asm/uaccess.h>
43
44#include <linux/dmi.h>
45#include <linux/jiffies.h>
46#include <linux/workqueue.h>
47
48#include <acpi/acpi_drivers.h>
49#include <acpi/acnamesp.h>
50
51
52/****************************************************************************
53 * Main driver
54 */
55
56#define IBM_NAME "thinkpad"
57#define IBM_DESC "ThinkPad ACPI Extras"
58#define IBM_FILE "thinkpad_acpi"
59#define IBM_URL "http://ibm-acpi.sf.net/"
60#define IBM_MAIL "ibm-acpi-devel@lists.sourceforge.net"
61
62#define IBM_PROC_DIR "ibm"
63#define IBM_ACPI_EVENT_PREFIX "ibm"
64#define IBM_DRVR_NAME IBM_FILE
65
66#define IBM_LOG IBM_FILE ": "
67#define IBM_ERR KERN_ERR IBM_LOG
68#define IBM_NOTICE KERN_NOTICE IBM_LOG
69#define IBM_INFO KERN_INFO IBM_LOG
70#define IBM_DEBUG KERN_DEBUG IBM_LOG
71
72#define IBM_MAX_ACPI_ARGS 3
73
74/* ThinkPad CMOS commands */
75#define TP_CMOS_VOLUME_DOWN 0
76#define TP_CMOS_VOLUME_UP 1
77#define TP_CMOS_VOLUME_MUTE 2
78#define TP_CMOS_BRIGHTNESS_UP 4
79#define TP_CMOS_BRIGHTNESS_DOWN 5
80
81#define onoff(status,bit) ((status) & (1 << (bit)) ? "on" : "off")
82#define enabled(status,bit) ((status) & (1 << (bit)) ? "enabled" : "disabled")
83#define strlencmp(a,b) (strncmp((a), (b), strlen(b)))
84
85/* Debugging */
86#define TPACPI_DBG_ALL 0xffff
87#define TPACPI_DBG_ALL 0xffff
88#define TPACPI_DBG_INIT 0x0001
89#define TPACPI_DBG_EXIT 0x0002
90#define dbg_printk(a_dbg_level, format, arg...) \
91 do { if (dbg_level & a_dbg_level) \
92 printk(IBM_DEBUG "%s: " format, __func__ , ## arg); } while (0)
93#ifdef CONFIG_THINKPAD_ACPI_DEBUG
94#define vdbg_printk(a_dbg_level, format, arg...) \
95 dbg_printk(a_dbg_level, format, ## arg)
96static const char *str_supported(int is_supported);
97#else
98#define vdbg_printk(a_dbg_level, format, arg...)
99#endif
100
101/* ACPI HIDs */
102#define IBM_HKEY_HID "IBM0068"
103#define IBM_PCI_HID "PNP0A03"
104
105/* ACPI helpers */
106static int __must_check acpi_evalf(acpi_handle handle,
107 void *res, char *method, char *fmt, ...);
108static int __must_check acpi_ec_read(int i, u8 * p);
109static int __must_check acpi_ec_write(int i, u8 v);
110static int __must_check _sta(acpi_handle handle);
111
112/* ACPI handles */
113static acpi_handle root_handle; /* root namespace */
114static acpi_handle ec_handle; /* EC */
115static acpi_handle ecrd_handle, ecwr_handle; /* 570 EC access */
116static acpi_handle cmos_handle, hkey_handle; /* basic thinkpad handles */
117
118static void drv_acpi_handle_init(char *name,
119 acpi_handle *handle, acpi_handle parent,
120 char **paths, int num_paths, char **path);
121#define IBM_ACPIHANDLE_INIT(object) \
122 drv_acpi_handle_init(#object, &object##_handle, *object##_parent, \
123 object##_paths, ARRAY_SIZE(object##_paths), &object##_path)
124
125/* ThinkPad ACPI helpers */
126static int issue_thinkpad_cmos_command(int cmos_cmd);
127
128/* procfs support */
129static struct proc_dir_entry *proc_dir;
130
131/* procfs helpers */
132static int dispatch_procfs_read(char *page, char **start, off_t off,
133 int count, int *eof, void *data);
134static int dispatch_procfs_write(struct file *file,
135 const char __user * userbuf,
136 unsigned long count, void *data);
137static char *next_cmd(char **cmds);
138
139/* sysfs support */
140struct attribute_set {
141 unsigned int members, max_members;
142 struct attribute_group group;
143};
144
145static struct attribute_set *create_attr_set(unsigned int max_members,
146 const char* name);
147#define destroy_attr_set(_set) \
148 kfree(_set);
149static int add_to_attr_set(struct attribute_set* s, struct attribute *attr);
150static int add_many_to_attr_set(struct attribute_set* s,
151 struct attribute **attr,
152 unsigned int count);
153#define register_attr_set_with_sysfs(_attr_set, _kobj) \
154 sysfs_create_group(_kobj, &_attr_set->group)
155static void delete_attr_set(struct attribute_set* s, struct kobject *kobj);
156
157static int parse_strtoul(const char *buf, unsigned long max,
158 unsigned long *value);
159
160/* Device model */
161static struct platform_device *tpacpi_pdev;
162static struct class_device *tpacpi_hwmon;
163static struct platform_driver tpacpi_pdriver;
164static int tpacpi_create_driver_attributes(struct device_driver *drv);
165static void tpacpi_remove_driver_attributes(struct device_driver *drv);
166
167/* Module */
168static int experimental;
169static u32 dbg_level;
170static int force_load;
171static char *ibm_thinkpad_ec_found;
172
173static char* check_dmi_for_ec(void);
174static int thinkpad_acpi_module_init(void);
175static void thinkpad_acpi_module_exit(void);
176
177
178/****************************************************************************
179 * Subdrivers
180 */
181
182struct ibm_struct;
183
184struct tp_acpi_drv_struct {
185 char *hid;
186 struct acpi_driver *driver;
187
188 void (*notify) (struct ibm_struct *, u32);
189 acpi_handle *handle;
190 u32 type;
191 struct acpi_device *device;
192};
193
194struct ibm_struct {
195 char *name;
196
197 int (*read) (char *);
198 int (*write) (char *);
199 void (*exit) (void);
200
201 struct list_head all_drivers;
202
203 struct tp_acpi_drv_struct *acpi;
204
205 struct {
206 u8 acpi_driver_registered:1;
207 u8 acpi_notify_installed:1;
208 u8 proc_created:1;
209 u8 init_called:1;
210 u8 experimental:1;
211 } flags;
212};
213
214struct ibm_init_struct {
215 char param[32];
216
217 int (*init) (struct ibm_init_struct *);
218 struct ibm_struct *data;
219};
220
221static struct {
222#ifdef CONFIG_THINKPAD_ACPI_BAY
223 u16 bay_status:1;
224 u16 bay_eject:1;
225 u16 bay_status2:1;
226 u16 bay_eject2:1;
227#endif
228 u16 bluetooth:1;
229 u16 hotkey:1;
230 u16 hotkey_mask:1;
231 u16 light:1;
232 u16 light_status:1;
233 u16 wan:1;
234 u16 fan_ctrl_status_undef:1;
235} tp_features;
236
237static struct list_head tpacpi_all_drivers;
238
239static struct ibm_init_struct ibms_init[];
240static int set_ibm_param(const char *val, struct kernel_param *kp);
241static int ibm_init(struct ibm_init_struct *iibm);
242static void ibm_exit(struct ibm_struct *ibm);
243
244
245/*
246 * procfs master subdriver
247 */
248static int thinkpad_acpi_driver_init(struct ibm_init_struct *iibm);
249static int thinkpad_acpi_driver_read(char *p);
250
251
252/*
253 * Bay subdriver
254 */
255
256#ifdef CONFIG_THINKPAD_ACPI_BAY
257static acpi_handle bay_handle, bay_ej_handle;
258static acpi_handle bay2_handle, bay2_ej_handle;
259
260static int bay_init(struct ibm_init_struct *iibm);
261static void bay_notify(struct ibm_struct *ibm, u32 event);
262static int bay_read(char *p);
263static int bay_write(char *buf);
264#endif /* CONFIG_THINKPAD_ACPI_BAY */
265
266
267/*
268 * Beep subdriver
269 */
270
271static acpi_handle beep_handle;
272
273static int beep_read(char *p);
274static int beep_write(char *buf);
275
276
277/*
278 * Bluetooth subdriver
279 */
280
281#define TPACPI_BLUETH_SYSFS_GROUP "bluetooth"
282
283enum {
284 /* ACPI GBDC/SBDC bits */
285 TP_ACPI_BLUETOOTH_HWPRESENT = 0x01, /* Bluetooth hw available */
286 TP_ACPI_BLUETOOTH_RADIOSSW = 0x02, /* Bluetooth radio enabled */
287 TP_ACPI_BLUETOOTH_UNK = 0x04, /* unknown function */
288};
289
290static int bluetooth_init(struct ibm_init_struct *iibm);
291static int bluetooth_get_radiosw(void);
292static int bluetooth_set_radiosw(int radio_on);
293static int bluetooth_read(char *p);
294static int bluetooth_write(char *buf);
295
296
297/*
298 * Brightness (backlight) subdriver
299 */
300
301#define TPACPI_BACKLIGHT_DEV_NAME "thinkpad_screen"
302
303static struct backlight_device *ibm_backlight_device;
304static int brightness_offset = 0x31;
305
306static int brightness_init(struct ibm_init_struct *iibm);
307static void brightness_exit(void);
308static int brightness_get(struct backlight_device *bd);
309static int brightness_set(int value);
310static int brightness_update_status(struct backlight_device *bd);
311static int brightness_read(char *p);
312static int brightness_write(char *buf);
313
314
315/*
316 * CMOS subdriver
317 */
318
319static int cmos_read(char *p);
320static int cmos_write(char *buf);
321
322
323/*
324 * Dock subdriver
325 */
326
327#ifdef CONFIG_THINKPAD_ACPI_DOCK
328static acpi_handle pci_handle;
329static acpi_handle dock_handle;
330
331static void dock_notify(struct ibm_struct *ibm, u32 event);
332static int dock_read(char *p);
333static int dock_write(char *buf);
334#endif /* CONFIG_THINKPAD_ACPI_DOCK */
335
336
337/*
338 * EC dump subdriver
339 */
340
341static int ecdump_read(char *p) ;
342static int ecdump_write(char *buf);
343
344
345/*
346 * Fan subdriver
347 */
348
349enum { /* Fan control constants */
350 fan_status_offset = 0x2f, /* EC register 0x2f */
351 fan_rpm_offset = 0x84, /* EC register 0x84: LSB, 0x85 MSB (RPM)
352 * 0x84 must be read before 0x85 */
353
354 TP_EC_FAN_FULLSPEED = 0x40, /* EC fan mode: full speed */
355 TP_EC_FAN_AUTO = 0x80, /* EC fan mode: auto fan control */
356
357 TPACPI_FAN_LAST_LEVEL = 0x100, /* Use cached last-seen fan level */
358};
359
360enum fan_status_access_mode {
361 TPACPI_FAN_NONE = 0, /* No fan status or control */
362 TPACPI_FAN_RD_ACPI_GFAN, /* Use ACPI GFAN */
363 TPACPI_FAN_RD_TPEC, /* Use ACPI EC regs 0x2f, 0x84-0x85 */
364};
365
366enum fan_control_access_mode {
367 TPACPI_FAN_WR_NONE = 0, /* No fan control */
368 TPACPI_FAN_WR_ACPI_SFAN, /* Use ACPI SFAN */
369 TPACPI_FAN_WR_TPEC, /* Use ACPI EC reg 0x2f */
370 TPACPI_FAN_WR_ACPI_FANS, /* Use ACPI FANS and EC reg 0x2f */
371};
372
373enum fan_control_commands {
374 TPACPI_FAN_CMD_SPEED = 0x0001, /* speed command */
375 TPACPI_FAN_CMD_LEVEL = 0x0002, /* level command */
376 TPACPI_FAN_CMD_ENABLE = 0x0004, /* enable/disable cmd,
377 * and also watchdog cmd */
378};
379
380static int fan_control_allowed;
381
382static enum fan_status_access_mode fan_status_access_mode;
383static enum fan_control_access_mode fan_control_access_mode;
384static enum fan_control_commands fan_control_commands;
385static u8 fan_control_initial_status;
386static u8 fan_control_desired_level;
387static int fan_watchdog_maxinterval;
388
389static struct mutex fan_mutex;
390
391static acpi_handle fans_handle, gfan_handle, sfan_handle;
392
393static int fan_init(struct ibm_init_struct *iibm);
394static void fan_exit(void);
395static int fan_get_status(u8 *status);
396static int fan_get_status_safe(u8 *status);
397static int fan_get_speed(unsigned int *speed);
398static void fan_update_desired_level(u8 status);
399static void fan_watchdog_fire(struct work_struct *ignored);
400static void fan_watchdog_reset(void);
401static int fan_set_level(int level);
402static int fan_set_level_safe(int level);
403static int fan_set_enable(void);
404static int fan_set_disable(void);
405static int fan_set_speed(int speed);
406static int fan_read(char *p);
407static int fan_write(char *buf);
408static int fan_write_cmd_level(const char *cmd, int *rc);
409static int fan_write_cmd_enable(const char *cmd, int *rc);
410static int fan_write_cmd_disable(const char *cmd, int *rc);
411static int fan_write_cmd_speed(const char *cmd, int *rc);
412static int fan_write_cmd_watchdog(const char *cmd, int *rc);
413
414
415/*
416 * Hotkey subdriver
417 */
418
419#define TPACPI_HOTKEY_SYSFS_GROUP "hotkey"
420
421static int hotkey_orig_status;
422static int hotkey_orig_mask;
423
424static struct mutex hotkey_mutex;
425
426static int hotkey_init(struct ibm_init_struct *iibm);
427static void hotkey_exit(void);
428static int hotkey_get(int *status, int *mask);
429static int hotkey_set(int status, int mask);
430static void hotkey_notify(struct ibm_struct *ibm, u32 event);
431static int hotkey_read(char *p);
432static int hotkey_write(char *buf);
433
434
435/*
436 * LED subdriver
437 */
438
439enum led_access_mode {
440 TPACPI_LED_NONE = 0,
441 TPACPI_LED_570, /* 570 */
442 TPACPI_LED_OLD, /* 600e/x, 770e, 770x, A21e, A2xm/p, T20-22, X20-21 */
443 TPACPI_LED_NEW, /* all others */
444};
445
446enum { /* For TPACPI_LED_OLD */
447 TPACPI_LED_EC_HLCL = 0x0c, /* EC reg to get led to power on */
448 TPACPI_LED_EC_HLBL = 0x0d, /* EC reg to blink a lit led */
449 TPACPI_LED_EC_HLMS = 0x0e, /* EC reg to select led to command */
450};
451
452static enum led_access_mode led_supported;
453static acpi_handle led_handle;
454
455static int led_init(struct ibm_init_struct *iibm);
456static int led_read(char *p);
457static int led_write(char *buf);
458
459/*
460 * Light (thinklight) subdriver
461 */
462
463static acpi_handle lght_handle, ledb_handle;
464
465static int light_init(struct ibm_init_struct *iibm);
466static int light_read(char *p);
467static int light_write(char *buf);
468
469
470/*
471 * Thermal subdriver
472 */
473
474enum thermal_access_mode {
475 TPACPI_THERMAL_NONE = 0, /* No thermal support */
476 TPACPI_THERMAL_ACPI_TMP07, /* Use ACPI TMP0-7 */
477 TPACPI_THERMAL_ACPI_UPDT, /* Use ACPI TMP0-7 with UPDT */
478 TPACPI_THERMAL_TPEC_8, /* Use ACPI EC regs, 8 sensors */
479 TPACPI_THERMAL_TPEC_16, /* Use ACPI EC regs, 16 sensors */
480};
481
482enum { /* TPACPI_THERMAL_TPEC_* */
483 TP_EC_THERMAL_TMP0 = 0x78, /* ACPI EC regs TMP 0..7 */
484 TP_EC_THERMAL_TMP8 = 0xC0, /* ACPI EC regs TMP 8..15 */
485 TP_EC_THERMAL_TMP_NA = -128, /* ACPI EC sensor not available */
486};
487
488#define TPACPI_MAX_THERMAL_SENSORS 16 /* Max thermal sensors supported */
489struct ibm_thermal_sensors_struct {
490 s32 temp[TPACPI_MAX_THERMAL_SENSORS];
491};
492
493static enum thermal_access_mode thermal_read_mode;
494
495static int thermal_init(struct ibm_init_struct *iibm);
496static int thermal_get_sensor(int idx, s32 *value);
497static int thermal_get_sensors(struct ibm_thermal_sensors_struct *s);
498static int thermal_read(char *p);
499
500
501/*
502 * Video subdriver
503 */
504
505enum video_access_mode {
506 TPACPI_VIDEO_NONE = 0,
507 TPACPI_VIDEO_570, /* 570 */
508 TPACPI_VIDEO_770, /* 600e/x, 770e, 770x */
509 TPACPI_VIDEO_NEW, /* all others */
510};
511
512enum { /* video status flags, based on VIDEO_570 */
513 TP_ACPI_VIDEO_S_LCD = 0x01, /* LCD output enabled */
514 TP_ACPI_VIDEO_S_CRT = 0x02, /* CRT output enabled */
515 TP_ACPI_VIDEO_S_DVI = 0x08, /* DVI output enabled */
516};
517
518enum { /* TPACPI_VIDEO_570 constants */
519 TP_ACPI_VIDEO_570_PHSCMD = 0x87, /* unknown magic constant :( */
520 TP_ACPI_VIDEO_570_PHSMASK = 0x03, /* PHS bits that map to
521 * video_status_flags */
522 TP_ACPI_VIDEO_570_PHS2CMD = 0x8b, /* unknown magic constant :( */
523 TP_ACPI_VIDEO_570_PHS2SET = 0x80, /* unknown magic constant :( */
524};
525
526static enum video_access_mode video_supported;
527static int video_orig_autosw;
528static acpi_handle vid_handle, vid2_handle;
529
530static int video_init(struct ibm_init_struct *iibm);
531static void video_exit(void);
532static int video_outputsw_get(void);
533static int video_outputsw_set(int status);
534static int video_autosw_get(void);
535static int video_autosw_set(int enable);
536static int video_outputsw_cycle(void);
537static int video_expand_toggle(void);
538static int video_read(char *p);
539static int video_write(char *buf);
540
541
542/*
543 * Volume subdriver
544 */
545
546static int volume_offset = 0x30;
547
548static int volume_read(char *p);
549static int volume_write(char *buf);
550
551
552/*
553 * Wan subdriver
554 */
555
556#define TPACPI_WAN_SYSFS_GROUP "wwan"
557
558enum {
559 /* ACPI GWAN/SWAN bits */
560 TP_ACPI_WANCARD_HWPRESENT = 0x01, /* Wan hw available */
561 TP_ACPI_WANCARD_RADIOSSW = 0x02, /* Wan radio enabled */
562 TP_ACPI_WANCARD_UNK = 0x04, /* unknown function */
563};
564
565static int wan_init(struct ibm_init_struct *iibm);
566static int wan_get_radiosw(void);
567static int wan_set_radiosw(int radio_on);
568static int wan_read(char *p);
569static int wan_write(char *buf);
570
571
572#endif /* __THINKPAD_ACPI_H */
generated by cgit v1.2.2 (git 2.25.0) at 2025-11-02 19:02:37 -0500