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Merge git://git.kernel.org/pub/scm/linux/kernel/git/jejb/scsi-rc-fixes-2.6
[deliverable/linux.git] / drivers / misc / thinkpad_acpi.c
1 /*
2 * thinkpad_acpi.c - ThinkPad ACPI Extras
3 *
4 *
5 * Copyright (C) 2004-2005 Borislav Deianov <borislav@users.sf.net>
6 * Copyright (C) 2006-2008 Henrique de Moraes Holschuh <hmh@hmh.eng.br>
7 *
8 * This program is free software; you can redistribute it and/or modify
9 * it under the terms of the GNU General Public License as published by
10 * the Free Software Foundation; either version 2 of the License, or
11 * (at your option) any later version.
12 *
13 * This program is distributed in the hope that it will be useful,
14 * but WITHOUT ANY WARRANTY; without even the implied warranty of
15 * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
16 * GNU General Public License for more details.
17 *
18 * You should have received a copy of the GNU General Public License
19 * along with this program; if not, write to the Free Software
20 * Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA
21 * 02110-1301, USA.
22 */
23
24 #define TPACPI_VERSION "0.19"
25 #define TPACPI_SYSFS_VERSION 0x020200
26
27 /*
28 * Changelog:
29 * 2007-10-20 changelog trimmed down
30 *
31 * 2007-03-27 0.14 renamed to thinkpad_acpi and moved to
32 * drivers/misc.
33 *
34 * 2006-11-22 0.13 new maintainer
35 * changelog now lives in git commit history, and will
36 * not be updated further in-file.
37 *
38 * 2005-03-17 0.11 support for 600e, 770x
39 * thanks to Jamie Lentin <lentinj@dial.pipex.com>
40 *
41 * 2005-01-16 0.9 use MODULE_VERSION
42 * thanks to Henrik Brix Andersen <brix@gentoo.org>
43 * fix parameter passing on module loading
44 * thanks to Rusty Russell <rusty@rustcorp.com.au>
45 * thanks to Jim Radford <radford@blackbean.org>
46 * 2004-11-08 0.8 fix init error case, don't return from a macro
47 * thanks to Chris Wright <chrisw@osdl.org>
48 */
49
50 #include <linux/kernel.h>
51 #include <linux/module.h>
52 #include <linux/init.h>
53 #include <linux/types.h>
54 #include <linux/string.h>
55 #include <linux/list.h>
56 #include <linux/mutex.h>
57 #include <linux/kthread.h>
58 #include <linux/freezer.h>
59 #include <linux/delay.h>
60
61 #include <linux/nvram.h>
62 #include <linux/proc_fs.h>
63 #include <linux/sysfs.h>
64 #include <linux/backlight.h>
65 #include <linux/fb.h>
66 #include <linux/platform_device.h>
67 #include <linux/hwmon.h>
68 #include <linux/hwmon-sysfs.h>
69 #include <linux/input.h>
70 #include <asm/uaccess.h>
71
72 #include <linux/dmi.h>
73 #include <linux/jiffies.h>
74 #include <linux/workqueue.h>
75
76 #include <acpi/acpi_drivers.h>
77 #include <acpi/acnamesp.h>
78
79 #include <linux/pci_ids.h>
80
81
82 /* ThinkPad CMOS commands */
83 #define TP_CMOS_VOLUME_DOWN 0
84 #define TP_CMOS_VOLUME_UP 1
85 #define TP_CMOS_VOLUME_MUTE 2
86 #define TP_CMOS_BRIGHTNESS_UP 4
87 #define TP_CMOS_BRIGHTNESS_DOWN 5
88
89 /* NVRAM Addresses */
90 enum tp_nvram_addr {
91 TP_NVRAM_ADDR_HK2 = 0x57,
92 TP_NVRAM_ADDR_THINKLIGHT = 0x58,
93 TP_NVRAM_ADDR_VIDEO = 0x59,
94 TP_NVRAM_ADDR_BRIGHTNESS = 0x5e,
95 TP_NVRAM_ADDR_MIXER = 0x60,
96 };
97
98 /* NVRAM bit masks */
99 enum {
100 TP_NVRAM_MASK_HKT_THINKPAD = 0x08,
101 TP_NVRAM_MASK_HKT_ZOOM = 0x20,
102 TP_NVRAM_MASK_HKT_DISPLAY = 0x40,
103 TP_NVRAM_MASK_HKT_HIBERNATE = 0x80,
104 TP_NVRAM_MASK_THINKLIGHT = 0x10,
105 TP_NVRAM_MASK_HKT_DISPEXPND = 0x30,
106 TP_NVRAM_MASK_HKT_BRIGHTNESS = 0x20,
107 TP_NVRAM_MASK_LEVEL_BRIGHTNESS = 0x0f,
108 TP_NVRAM_POS_LEVEL_BRIGHTNESS = 0,
109 TP_NVRAM_MASK_MUTE = 0x40,
110 TP_NVRAM_MASK_HKT_VOLUME = 0x80,
111 TP_NVRAM_MASK_LEVEL_VOLUME = 0x0f,
112 TP_NVRAM_POS_LEVEL_VOLUME = 0,
113 };
114
115 /* ACPI HIDs */
116 #define TPACPI_ACPI_HKEY_HID "IBM0068"
117
118 /* Input IDs */
119 #define TPACPI_HKEY_INPUT_PRODUCT 0x5054 /* "TP" */
120 #define TPACPI_HKEY_INPUT_VERSION 0x4101
121
122
123 /****************************************************************************
124 * Main driver
125 */
126
127 #define TPACPI_NAME "thinkpad"
128 #define TPACPI_DESC "ThinkPad ACPI Extras"
129 #define TPACPI_FILE TPACPI_NAME "_acpi"
130 #define TPACPI_URL "http://ibm-acpi.sf.net/"
131 #define TPACPI_MAIL "ibm-acpi-devel@lists.sourceforge.net"
132
133 #define TPACPI_PROC_DIR "ibm"
134 #define TPACPI_ACPI_EVENT_PREFIX "ibm"
135 #define TPACPI_DRVR_NAME TPACPI_FILE
136 #define TPACPI_HWMON_DRVR_NAME TPACPI_NAME "_hwmon"
137
138 #define TPACPI_MAX_ACPI_ARGS 3
139
140 /* Debugging */
141 #define TPACPI_LOG TPACPI_FILE ": "
142 #define TPACPI_ERR KERN_ERR TPACPI_LOG
143 #define TPACPI_NOTICE KERN_NOTICE TPACPI_LOG
144 #define TPACPI_INFO KERN_INFO TPACPI_LOG
145 #define TPACPI_DEBUG KERN_DEBUG TPACPI_LOG
146
147 #define TPACPI_DBG_ALL 0xffff
148 #define TPACPI_DBG_ALL 0xffff
149 #define TPACPI_DBG_INIT 0x0001
150 #define TPACPI_DBG_EXIT 0x0002
151 #define dbg_printk(a_dbg_level, format, arg...) \
152 do { if (dbg_level & a_dbg_level) \
153 printk(TPACPI_DEBUG "%s: " format, __func__ , ## arg); \
154 } while (0)
155 #ifdef CONFIG_THINKPAD_ACPI_DEBUG
156 #define vdbg_printk(a_dbg_level, format, arg...) \
157 dbg_printk(a_dbg_level, format, ## arg)
158 static const char *str_supported(int is_supported);
159 #else
160 #define vdbg_printk(a_dbg_level, format, arg...)
161 #endif
162
163 #define onoff(status, bit) ((status) & (1 << (bit)) ? "on" : "off")
164 #define enabled(status, bit) ((status) & (1 << (bit)) ? "enabled" : "disabled")
165 #define strlencmp(a, b) (strncmp((a), (b), strlen(b)))
166
167
168 /****************************************************************************
169 * Driver-wide structs and misc. variables
170 */
171
172 struct ibm_struct;
173
174 struct tp_acpi_drv_struct {
175 const struct acpi_device_id *hid;
176 struct acpi_driver *driver;
177
178 void (*notify) (struct ibm_struct *, u32);
179 acpi_handle *handle;
180 u32 type;
181 struct acpi_device *device;
182 };
183
184 struct ibm_struct {
185 char *name;
186
187 int (*read) (char *);
188 int (*write) (char *);
189 void (*exit) (void);
190 void (*resume) (void);
191 void (*suspend) (pm_message_t state);
192
193 struct list_head all_drivers;
194
195 struct tp_acpi_drv_struct *acpi;
196
197 struct {
198 u8 acpi_driver_registered:1;
199 u8 acpi_notify_installed:1;
200 u8 proc_created:1;
201 u8 init_called:1;
202 u8 experimental:1;
203 } flags;
204 };
205
206 struct ibm_init_struct {
207 char param[32];
208
209 int (*init) (struct ibm_init_struct *);
210 struct ibm_struct *data;
211 };
212
213 static struct {
214 #ifdef CONFIG_THINKPAD_ACPI_BAY
215 u32 bay_status:1;
216 u32 bay_eject:1;
217 u32 bay_status2:1;
218 u32 bay_eject2:1;
219 #endif
220 u32 bluetooth:1;
221 u32 hotkey:1;
222 u32 hotkey_mask:1;
223 u32 hotkey_wlsw:1;
224 u32 hotkey_tablet:1;
225 u32 light:1;
226 u32 light_status:1;
227 u32 bright_16levels:1;
228 u32 wan:1;
229 u32 fan_ctrl_status_undef:1;
230 u32 input_device_registered:1;
231 u32 platform_drv_registered:1;
232 u32 platform_drv_attrs_registered:1;
233 u32 sensors_pdrv_registered:1;
234 u32 sensors_pdrv_attrs_registered:1;
235 u32 sensors_pdev_attrs_registered:1;
236 u32 hotkey_poll_active:1;
237 } tp_features;
238
239 struct thinkpad_id_data {
240 unsigned int vendor; /* ThinkPad vendor:
241 * PCI_VENDOR_ID_IBM/PCI_VENDOR_ID_LENOVO */
242
243 char *bios_version_str; /* Something like 1ZET51WW (1.03z) */
244 char *ec_version_str; /* Something like 1ZHT51WW-1.04a */
245
246 u16 bios_model; /* Big Endian, TP-1Y = 0x5931, 0 = unknown */
247 u16 ec_model;
248
249 char *model_str;
250 };
251 static struct thinkpad_id_data thinkpad_id;
252
253 static enum {
254 TPACPI_LIFE_INIT = 0,
255 TPACPI_LIFE_RUNNING,
256 TPACPI_LIFE_EXITING,
257 } tpacpi_lifecycle;
258
259 static int experimental;
260 static u32 dbg_level;
261
262 /****************************************************************************
263 ****************************************************************************
264 *
265 * ACPI Helpers and device model
266 *
267 ****************************************************************************
268 ****************************************************************************/
269
270 /*************************************************************************
271 * ACPI basic handles
272 */
273
274 static acpi_handle root_handle;
275
276 #define TPACPI_HANDLE(object, parent, paths...) \
277 static acpi_handle object##_handle; \
278 static acpi_handle *object##_parent = &parent##_handle; \
279 static char *object##_path; \
280 static char *object##_paths[] = { paths }
281
282 TPACPI_HANDLE(ec, root, "\\_SB.PCI0.ISA.EC0", /* 240, 240x */
283 "\\_SB.PCI.ISA.EC", /* 570 */
284 "\\_SB.PCI0.ISA0.EC0", /* 600e/x, 770e, 770x */
285 "\\_SB.PCI0.ISA.EC", /* A21e, A2xm/p, T20-22, X20-21 */
286 "\\_SB.PCI0.AD4S.EC0", /* i1400, R30 */
287 "\\_SB.PCI0.ICH3.EC0", /* R31 */
288 "\\_SB.PCI0.LPC.EC", /* all others */
289 );
290
291 TPACPI_HANDLE(ecrd, ec, "ECRD"); /* 570 */
292 TPACPI_HANDLE(ecwr, ec, "ECWR"); /* 570 */
293
294 TPACPI_HANDLE(cmos, root, "\\UCMS", /* R50, R50e, R50p, R51, */
295 /* T4x, X31, X40 */
296 "\\CMOS", /* A3x, G4x, R32, T23, T30, X22-24, X30 */
297 "\\CMS", /* R40, R40e */
298 ); /* all others */
299
300 TPACPI_HANDLE(hkey, ec, "\\_SB.HKEY", /* 600e/x, 770e, 770x */
301 "^HKEY", /* R30, R31 */
302 "HKEY", /* all others */
303 ); /* 570 */
304
305 TPACPI_HANDLE(vid, root, "\\_SB.PCI.AGP.VGA", /* 570 */
306 "\\_SB.PCI0.AGP0.VID0", /* 600e/x, 770x */
307 "\\_SB.PCI0.VID0", /* 770e */
308 "\\_SB.PCI0.VID", /* A21e, G4x, R50e, X30, X40 */
309 "\\_SB.PCI0.AGP.VID", /* all others */
310 ); /* R30, R31 */
311
312
313 /*************************************************************************
314 * ACPI helpers
315 */
316
317 static int acpi_evalf(acpi_handle handle,
318 void *res, char *method, char *fmt, ...)
319 {
320 char *fmt0 = fmt;
321 struct acpi_object_list params;
322 union acpi_object in_objs[TPACPI_MAX_ACPI_ARGS];
323 struct acpi_buffer result, *resultp;
324 union acpi_object out_obj;
325 acpi_status status;
326 va_list ap;
327 char res_type;
328 int success;
329 int quiet;
330
331 if (!*fmt) {
332 printk(TPACPI_ERR "acpi_evalf() called with empty format\n");
333 return 0;
334 }
335
336 if (*fmt == 'q') {
337 quiet = 1;
338 fmt++;
339 } else
340 quiet = 0;
341
342 res_type = *(fmt++);
343
344 params.count = 0;
345 params.pointer = &in_objs[0];
346
347 va_start(ap, fmt);
348 while (*fmt) {
349 char c = *(fmt++);
350 switch (c) {
351 case 'd': /* int */
352 in_objs[params.count].integer.value = va_arg(ap, int);
353 in_objs[params.count++].type = ACPI_TYPE_INTEGER;
354 break;
355 /* add more types as needed */
356 default:
357 printk(TPACPI_ERR "acpi_evalf() called "
358 "with invalid format character '%c'\n", c);
359 return 0;
360 }
361 }
362 va_end(ap);
363
364 if (res_type != 'v') {
365 result.length = sizeof(out_obj);
366 result.pointer = &out_obj;
367 resultp = &result;
368 } else
369 resultp = NULL;
370
371 status = acpi_evaluate_object(handle, method, &params, resultp);
372
373 switch (res_type) {
374 case 'd': /* int */
375 if (res)
376 *(int *)res = out_obj.integer.value;
377 success = status == AE_OK && out_obj.type == ACPI_TYPE_INTEGER;
378 break;
379 case 'v': /* void */
380 success = status == AE_OK;
381 break;
382 /* add more types as needed */
383 default:
384 printk(TPACPI_ERR "acpi_evalf() called "
385 "with invalid format character '%c'\n", res_type);
386 return 0;
387 }
388
389 if (!success && !quiet)
390 printk(TPACPI_ERR "acpi_evalf(%s, %s, ...) failed: %d\n",
391 method, fmt0, status);
392
393 return success;
394 }
395
396 static int acpi_ec_read(int i, u8 *p)
397 {
398 int v;
399
400 if (ecrd_handle) {
401 if (!acpi_evalf(ecrd_handle, &v, NULL, "dd", i))
402 return 0;
403 *p = v;
404 } else {
405 if (ec_read(i, p) < 0)
406 return 0;
407 }
408
409 return 1;
410 }
411
412 static int acpi_ec_write(int i, u8 v)
413 {
414 if (ecwr_handle) {
415 if (!acpi_evalf(ecwr_handle, NULL, NULL, "vdd", i, v))
416 return 0;
417 } else {
418 if (ec_write(i, v) < 0)
419 return 0;
420 }
421
422 return 1;
423 }
424
425 #if defined(CONFIG_THINKPAD_ACPI_DOCK) || defined(CONFIG_THINKPAD_ACPI_BAY)
426 static int _sta(acpi_handle handle)
427 {
428 int status;
429
430 if (!handle || !acpi_evalf(handle, &status, "_STA", "d"))
431 status = 0;
432
433 return status;
434 }
435 #endif
436
437 static int issue_thinkpad_cmos_command(int cmos_cmd)
438 {
439 if (!cmos_handle)
440 return -ENXIO;
441
442 if (!acpi_evalf(cmos_handle, NULL, NULL, "vd", cmos_cmd))
443 return -EIO;
444
445 return 0;
446 }
447
448 /*************************************************************************
449 * ACPI device model
450 */
451
452 #define TPACPI_ACPIHANDLE_INIT(object) \
453 drv_acpi_handle_init(#object, &object##_handle, *object##_parent, \
454 object##_paths, ARRAY_SIZE(object##_paths), &object##_path)
455
456 static void drv_acpi_handle_init(char *name,
457 acpi_handle *handle, acpi_handle parent,
458 char **paths, int num_paths, char **path)
459 {
460 int i;
461 acpi_status status;
462
463 vdbg_printk(TPACPI_DBG_INIT, "trying to locate ACPI handle for %s\n",
464 name);
465
466 for (i = 0; i < num_paths; i++) {
467 status = acpi_get_handle(parent, paths[i], handle);
468 if (ACPI_SUCCESS(status)) {
469 *path = paths[i];
470 dbg_printk(TPACPI_DBG_INIT,
471 "Found ACPI handle %s for %s\n",
472 *path, name);
473 return;
474 }
475 }
476
477 vdbg_printk(TPACPI_DBG_INIT, "ACPI handle for %s not found\n",
478 name);
479 *handle = NULL;
480 }
481
482 static void dispatch_acpi_notify(acpi_handle handle, u32 event, void *data)
483 {
484 struct ibm_struct *ibm = data;
485
486 if (tpacpi_lifecycle != TPACPI_LIFE_RUNNING)
487 return;
488
489 if (!ibm || !ibm->acpi || !ibm->acpi->notify)
490 return;
491
492 ibm->acpi->notify(ibm, event);
493 }
494
495 static int __init setup_acpi_notify(struct ibm_struct *ibm)
496 {
497 acpi_status status;
498 int rc;
499
500 BUG_ON(!ibm->acpi);
501
502 if (!*ibm->acpi->handle)
503 return 0;
504
505 vdbg_printk(TPACPI_DBG_INIT,
506 "setting up ACPI notify for %s\n", ibm->name);
507
508 rc = acpi_bus_get_device(*ibm->acpi->handle, &ibm->acpi->device);
509 if (rc < 0) {
510 printk(TPACPI_ERR "acpi_bus_get_device(%s) failed: %d\n",
511 ibm->name, rc);
512 return -ENODEV;
513 }
514
515 acpi_driver_data(ibm->acpi->device) = ibm;
516 sprintf(acpi_device_class(ibm->acpi->device), "%s/%s",
517 TPACPI_ACPI_EVENT_PREFIX,
518 ibm->name);
519
520 status = acpi_install_notify_handler(*ibm->acpi->handle,
521 ibm->acpi->type, dispatch_acpi_notify, ibm);
522 if (ACPI_FAILURE(status)) {
523 if (status == AE_ALREADY_EXISTS) {
524 printk(TPACPI_NOTICE
525 "another device driver is already "
526 "handling %s events\n", ibm->name);
527 } else {
528 printk(TPACPI_ERR
529 "acpi_install_notify_handler(%s) failed: %d\n",
530 ibm->name, status);
531 }
532 return -ENODEV;
533 }
534 ibm->flags.acpi_notify_installed = 1;
535 return 0;
536 }
537
538 static int __init tpacpi_device_add(struct acpi_device *device)
539 {
540 return 0;
541 }
542
543 static int __init register_tpacpi_subdriver(struct ibm_struct *ibm)
544 {
545 int rc;
546
547 dbg_printk(TPACPI_DBG_INIT,
548 "registering %s as an ACPI driver\n", ibm->name);
549
550 BUG_ON(!ibm->acpi);
551
552 ibm->acpi->driver = kzalloc(sizeof(struct acpi_driver), GFP_KERNEL);
553 if (!ibm->acpi->driver) {
554 printk(TPACPI_ERR "kzalloc(ibm->driver) failed\n");
555 return -ENOMEM;
556 }
557
558 sprintf(ibm->acpi->driver->name, "%s_%s", TPACPI_NAME, ibm->name);
559 ibm->acpi->driver->ids = ibm->acpi->hid;
560
561 ibm->acpi->driver->ops.add = &tpacpi_device_add;
562
563 rc = acpi_bus_register_driver(ibm->acpi->driver);
564 if (rc < 0) {
565 printk(TPACPI_ERR "acpi_bus_register_driver(%s) failed: %d\n",
566 ibm->name, rc);
567 kfree(ibm->acpi->driver);
568 ibm->acpi->driver = NULL;
569 } else if (!rc)
570 ibm->flags.acpi_driver_registered = 1;
571
572 return rc;
573 }
574
575
576 /****************************************************************************
577 ****************************************************************************
578 *
579 * Procfs Helpers
580 *
581 ****************************************************************************
582 ****************************************************************************/
583
584 static int dispatch_procfs_read(char *page, char **start, off_t off,
585 int count, int *eof, void *data)
586 {
587 struct ibm_struct *ibm = data;
588 int len;
589
590 if (!ibm || !ibm->read)
591 return -EINVAL;
592
593 len = ibm->read(page);
594 if (len < 0)
595 return len;
596
597 if (len <= off + count)
598 *eof = 1;
599 *start = page + off;
600 len -= off;
601 if (len > count)
602 len = count;
603 if (len < 0)
604 len = 0;
605
606 return len;
607 }
608
609 static int dispatch_procfs_write(struct file *file,
610 const char __user *userbuf,
611 unsigned long count, void *data)
612 {
613 struct ibm_struct *ibm = data;
614 char *kernbuf;
615 int ret;
616
617 if (!ibm || !ibm->write)
618 return -EINVAL;
619
620 kernbuf = kmalloc(count + 2, GFP_KERNEL);
621 if (!kernbuf)
622 return -ENOMEM;
623
624 if (copy_from_user(kernbuf, userbuf, count)) {
625 kfree(kernbuf);
626 return -EFAULT;
627 }
628
629 kernbuf[count] = 0;
630 strcat(kernbuf, ",");
631 ret = ibm->write(kernbuf);
632 if (ret == 0)
633 ret = count;
634
635 kfree(kernbuf);
636
637 return ret;
638 }
639
640 static char *next_cmd(char **cmds)
641 {
642 char *start = *cmds;
643 char *end;
644
645 while ((end = strchr(start, ',')) && end == start)
646 start = end + 1;
647
648 if (!end)
649 return NULL;
650
651 *end = 0;
652 *cmds = end + 1;
653 return start;
654 }
655
656
657 /****************************************************************************
658 ****************************************************************************
659 *
660 * Device model: input, hwmon and platform
661 *
662 ****************************************************************************
663 ****************************************************************************/
664
665 static struct platform_device *tpacpi_pdev;
666 static struct platform_device *tpacpi_sensors_pdev;
667 static struct device *tpacpi_hwmon;
668 static struct input_dev *tpacpi_inputdev;
669 static struct mutex tpacpi_inputdev_send_mutex;
670 static LIST_HEAD(tpacpi_all_drivers);
671
672 static int tpacpi_suspend_handler(struct platform_device *pdev,
673 pm_message_t state)
674 {
675 struct ibm_struct *ibm, *itmp;
676
677 list_for_each_entry_safe(ibm, itmp,
678 &tpacpi_all_drivers,
679 all_drivers) {
680 if (ibm->suspend)
681 (ibm->suspend)(state);
682 }
683
684 return 0;
685 }
686
687 static int tpacpi_resume_handler(struct platform_device *pdev)
688 {
689 struct ibm_struct *ibm, *itmp;
690
691 list_for_each_entry_safe(ibm, itmp,
692 &tpacpi_all_drivers,
693 all_drivers) {
694 if (ibm->resume)
695 (ibm->resume)();
696 }
697
698 return 0;
699 }
700
701 static struct platform_driver tpacpi_pdriver = {
702 .driver = {
703 .name = TPACPI_DRVR_NAME,
704 .owner = THIS_MODULE,
705 },
706 .suspend = tpacpi_suspend_handler,
707 .resume = tpacpi_resume_handler,
708 };
709
710 static struct platform_driver tpacpi_hwmon_pdriver = {
711 .driver = {
712 .name = TPACPI_HWMON_DRVR_NAME,
713 .owner = THIS_MODULE,
714 },
715 };
716
717 /*************************************************************************
718 * sysfs support helpers
719 */
720
721 struct attribute_set {
722 unsigned int members, max_members;
723 struct attribute_group group;
724 };
725
726 struct attribute_set_obj {
727 struct attribute_set s;
728 struct attribute *a;
729 } __attribute__((packed));
730
731 static struct attribute_set *create_attr_set(unsigned int max_members,
732 const char *name)
733 {
734 struct attribute_set_obj *sobj;
735
736 if (max_members == 0)
737 return NULL;
738
739 /* Allocates space for implicit NULL at the end too */
740 sobj = kzalloc(sizeof(struct attribute_set_obj) +
741 max_members * sizeof(struct attribute *),
742 GFP_KERNEL);
743 if (!sobj)
744 return NULL;
745 sobj->s.max_members = max_members;
746 sobj->s.group.attrs = &sobj->a;
747 sobj->s.group.name = name;
748
749 return &sobj->s;
750 }
751
752 #define destroy_attr_set(_set) \
753 kfree(_set);
754
755 /* not multi-threaded safe, use it in a single thread per set */
756 static int add_to_attr_set(struct attribute_set *s, struct attribute *attr)
757 {
758 if (!s || !attr)
759 return -EINVAL;
760
761 if (s->members >= s->max_members)
762 return -ENOMEM;
763
764 s->group.attrs[s->members] = attr;
765 s->members++;
766
767 return 0;
768 }
769
770 static int add_many_to_attr_set(struct attribute_set *s,
771 struct attribute **attr,
772 unsigned int count)
773 {
774 int i, res;
775
776 for (i = 0; i < count; i++) {
777 res = add_to_attr_set(s, attr[i]);
778 if (res)
779 return res;
780 }
781
782 return 0;
783 }
784
785 static void delete_attr_set(struct attribute_set *s, struct kobject *kobj)
786 {
787 sysfs_remove_group(kobj, &s->group);
788 destroy_attr_set(s);
789 }
790
791 #define register_attr_set_with_sysfs(_attr_set, _kobj) \
792 sysfs_create_group(_kobj, &_attr_set->group)
793
794 static int parse_strtoul(const char *buf,
795 unsigned long max, unsigned long *value)
796 {
797 char *endp;
798
799 while (*buf && isspace(*buf))
800 buf++;
801 *value = simple_strtoul(buf, &endp, 0);
802 while (*endp && isspace(*endp))
803 endp++;
804 if (*endp || *value > max)
805 return -EINVAL;
806
807 return 0;
808 }
809
810 /*************************************************************************
811 * thinkpad-acpi driver attributes
812 */
813
814 /* interface_version --------------------------------------------------- */
815 static ssize_t tpacpi_driver_interface_version_show(
816 struct device_driver *drv,
817 char *buf)
818 {
819 return snprintf(buf, PAGE_SIZE, "0x%08x\n", TPACPI_SYSFS_VERSION);
820 }
821
822 static DRIVER_ATTR(interface_version, S_IRUGO,
823 tpacpi_driver_interface_version_show, NULL);
824
825 /* debug_level --------------------------------------------------------- */
826 static ssize_t tpacpi_driver_debug_show(struct device_driver *drv,
827 char *buf)
828 {
829 return snprintf(buf, PAGE_SIZE, "0x%04x\n", dbg_level);
830 }
831
832 static ssize_t tpacpi_driver_debug_store(struct device_driver *drv,
833 const char *buf, size_t count)
834 {
835 unsigned long t;
836
837 if (parse_strtoul(buf, 0xffff, &t))
838 return -EINVAL;
839
840 dbg_level = t;
841
842 return count;
843 }
844
845 static DRIVER_ATTR(debug_level, S_IWUSR | S_IRUGO,
846 tpacpi_driver_debug_show, tpacpi_driver_debug_store);
847
848 /* version ------------------------------------------------------------- */
849 static ssize_t tpacpi_driver_version_show(struct device_driver *drv,
850 char *buf)
851 {
852 return snprintf(buf, PAGE_SIZE, "%s v%s\n",
853 TPACPI_DESC, TPACPI_VERSION);
854 }
855
856 static DRIVER_ATTR(version, S_IRUGO,
857 tpacpi_driver_version_show, NULL);
858
859 /* --------------------------------------------------------------------- */
860
861 static struct driver_attribute *tpacpi_driver_attributes[] = {
862 &driver_attr_debug_level, &driver_attr_version,
863 &driver_attr_interface_version,
864 };
865
866 static int __init tpacpi_create_driver_attributes(struct device_driver *drv)
867 {
868 int i, res;
869
870 i = 0;
871 res = 0;
872 while (!res && i < ARRAY_SIZE(tpacpi_driver_attributes)) {
873 res = driver_create_file(drv, tpacpi_driver_attributes[i]);
874 i++;
875 }
876
877 return res;
878 }
879
880 static void tpacpi_remove_driver_attributes(struct device_driver *drv)
881 {
882 int i;
883
884 for (i = 0; i < ARRAY_SIZE(tpacpi_driver_attributes); i++)
885 driver_remove_file(drv, tpacpi_driver_attributes[i]);
886 }
887
888 /****************************************************************************
889 ****************************************************************************
890 *
891 * Subdrivers
892 *
893 ****************************************************************************
894 ****************************************************************************/
895
896 /*************************************************************************
897 * thinkpad-acpi init subdriver
898 */
899
900 static int __init thinkpad_acpi_driver_init(struct ibm_init_struct *iibm)
901 {
902 printk(TPACPI_INFO "%s v%s\n", TPACPI_DESC, TPACPI_VERSION);
903 printk(TPACPI_INFO "%s\n", TPACPI_URL);
904
905 printk(TPACPI_INFO "ThinkPad BIOS %s, EC %s\n",
906 (thinkpad_id.bios_version_str) ?
907 thinkpad_id.bios_version_str : "unknown",
908 (thinkpad_id.ec_version_str) ?
909 thinkpad_id.ec_version_str : "unknown");
910
911 if (thinkpad_id.vendor && thinkpad_id.model_str)
912 printk(TPACPI_INFO "%s %s\n",
913 (thinkpad_id.vendor == PCI_VENDOR_ID_IBM) ?
914 "IBM" : ((thinkpad_id.vendor ==
915 PCI_VENDOR_ID_LENOVO) ?
916 "Lenovo" : "Unknown vendor"),
917 thinkpad_id.model_str);
918
919 return 0;
920 }
921
922 static int thinkpad_acpi_driver_read(char *p)
923 {
924 int len = 0;
925
926 len += sprintf(p + len, "driver:\t\t%s\n", TPACPI_DESC);
927 len += sprintf(p + len, "version:\t%s\n", TPACPI_VERSION);
928
929 return len;
930 }
931
932 static struct ibm_struct thinkpad_acpi_driver_data = {
933 .name = "driver",
934 .read = thinkpad_acpi_driver_read,
935 };
936
937 /*************************************************************************
938 * Hotkey subdriver
939 */
940
941 enum { /* hot key scan codes (derived from ACPI DSDT) */
942 TP_ACPI_HOTKEYSCAN_FNF1 = 0,
943 TP_ACPI_HOTKEYSCAN_FNF2,
944 TP_ACPI_HOTKEYSCAN_FNF3,
945 TP_ACPI_HOTKEYSCAN_FNF4,
946 TP_ACPI_HOTKEYSCAN_FNF5,
947 TP_ACPI_HOTKEYSCAN_FNF6,
948 TP_ACPI_HOTKEYSCAN_FNF7,
949 TP_ACPI_HOTKEYSCAN_FNF8,
950 TP_ACPI_HOTKEYSCAN_FNF9,
951 TP_ACPI_HOTKEYSCAN_FNF10,
952 TP_ACPI_HOTKEYSCAN_FNF11,
953 TP_ACPI_HOTKEYSCAN_FNF12,
954 TP_ACPI_HOTKEYSCAN_FNBACKSPACE,
955 TP_ACPI_HOTKEYSCAN_FNINSERT,
956 TP_ACPI_HOTKEYSCAN_FNDELETE,
957 TP_ACPI_HOTKEYSCAN_FNHOME,
958 TP_ACPI_HOTKEYSCAN_FNEND,
959 TP_ACPI_HOTKEYSCAN_FNPAGEUP,
960 TP_ACPI_HOTKEYSCAN_FNPAGEDOWN,
961 TP_ACPI_HOTKEYSCAN_FNSPACE,
962 TP_ACPI_HOTKEYSCAN_VOLUMEUP,
963 TP_ACPI_HOTKEYSCAN_VOLUMEDOWN,
964 TP_ACPI_HOTKEYSCAN_MUTE,
965 TP_ACPI_HOTKEYSCAN_THINKPAD,
966 };
967
968 enum { /* Keys available through NVRAM polling */
969 TPACPI_HKEY_NVRAM_KNOWN_MASK = 0x00fb88c0U,
970 TPACPI_HKEY_NVRAM_GOOD_MASK = 0x00fb8000U,
971 };
972
973 enum { /* Positions of some of the keys in hotkey masks */
974 TP_ACPI_HKEY_DISPSWTCH_MASK = 1 << TP_ACPI_HOTKEYSCAN_FNF7,
975 TP_ACPI_HKEY_DISPXPAND_MASK = 1 << TP_ACPI_HOTKEYSCAN_FNF8,
976 TP_ACPI_HKEY_HIBERNATE_MASK = 1 << TP_ACPI_HOTKEYSCAN_FNF12,
977 TP_ACPI_HKEY_BRGHTUP_MASK = 1 << TP_ACPI_HOTKEYSCAN_FNHOME,
978 TP_ACPI_HKEY_BRGHTDWN_MASK = 1 << TP_ACPI_HOTKEYSCAN_FNEND,
979 TP_ACPI_HKEY_THNKLGHT_MASK = 1 << TP_ACPI_HOTKEYSCAN_FNPAGEUP,
980 TP_ACPI_HKEY_ZOOM_MASK = 1 << TP_ACPI_HOTKEYSCAN_FNSPACE,
981 TP_ACPI_HKEY_VOLUP_MASK = 1 << TP_ACPI_HOTKEYSCAN_VOLUMEUP,
982 TP_ACPI_HKEY_VOLDWN_MASK = 1 << TP_ACPI_HOTKEYSCAN_VOLUMEDOWN,
983 TP_ACPI_HKEY_MUTE_MASK = 1 << TP_ACPI_HOTKEYSCAN_MUTE,
984 TP_ACPI_HKEY_THINKPAD_MASK = 1 << TP_ACPI_HOTKEYSCAN_THINKPAD,
985 };
986
987 enum { /* NVRAM to ACPI HKEY group map */
988 TP_NVRAM_HKEY_GROUP_HK2 = TP_ACPI_HKEY_THINKPAD_MASK |
989 TP_ACPI_HKEY_ZOOM_MASK |
990 TP_ACPI_HKEY_DISPSWTCH_MASK |
991 TP_ACPI_HKEY_HIBERNATE_MASK,
992 TP_NVRAM_HKEY_GROUP_BRIGHTNESS = TP_ACPI_HKEY_BRGHTUP_MASK |
993 TP_ACPI_HKEY_BRGHTDWN_MASK,
994 TP_NVRAM_HKEY_GROUP_VOLUME = TP_ACPI_HKEY_VOLUP_MASK |
995 TP_ACPI_HKEY_VOLDWN_MASK |
996 TP_ACPI_HKEY_MUTE_MASK,
997 };
998
999 #ifdef CONFIG_THINKPAD_ACPI_HOTKEY_POLL
1000 struct tp_nvram_state {
1001 u16 thinkpad_toggle:1;
1002 u16 zoom_toggle:1;
1003 u16 display_toggle:1;
1004 u16 thinklight_toggle:1;
1005 u16 hibernate_toggle:1;
1006 u16 displayexp_toggle:1;
1007 u16 display_state:1;
1008 u16 brightness_toggle:1;
1009 u16 volume_toggle:1;
1010 u16 mute:1;
1011
1012 u8 brightness_level;
1013 u8 volume_level;
1014 };
1015
1016 static struct task_struct *tpacpi_hotkey_task;
1017 static u32 hotkey_source_mask; /* bit mask 0=ACPI,1=NVRAM */
1018 static int hotkey_poll_freq = 10; /* Hz */
1019 static struct mutex hotkey_thread_mutex;
1020 static struct mutex hotkey_thread_data_mutex;
1021 static unsigned int hotkey_config_change;
1022
1023 #else /* CONFIG_THINKPAD_ACPI_HOTKEY_POLL */
1024
1025 #define hotkey_source_mask 0U
1026
1027 #endif /* CONFIG_THINKPAD_ACPI_HOTKEY_POLL */
1028
1029 static struct mutex hotkey_mutex;
1030
1031 static enum { /* Reasons for waking up */
1032 TP_ACPI_WAKEUP_NONE = 0, /* None or unknown */
1033 TP_ACPI_WAKEUP_BAYEJ, /* Bay ejection request */
1034 TP_ACPI_WAKEUP_UNDOCK, /* Undock request */
1035 } hotkey_wakeup_reason;
1036
1037 static int hotkey_autosleep_ack;
1038
1039 static int hotkey_orig_status;
1040 static u32 hotkey_orig_mask;
1041 static u32 hotkey_all_mask;
1042 static u32 hotkey_reserved_mask;
1043 static u32 hotkey_mask;
1044
1045 static unsigned int hotkey_report_mode;
1046
1047 static u16 *hotkey_keycode_map;
1048
1049 static struct attribute_set *hotkey_dev_attributes;
1050
1051 #ifdef CONFIG_THINKPAD_ACPI_HOTKEY_POLL
1052 #define HOTKEY_CONFIG_CRITICAL_START \
1053 do { \
1054 mutex_lock(&hotkey_thread_data_mutex); \
1055 hotkey_config_change++; \
1056 } while (0);
1057 #define HOTKEY_CONFIG_CRITICAL_END \
1058 mutex_unlock(&hotkey_thread_data_mutex);
1059 #else
1060 #define HOTKEY_CONFIG_CRITICAL_START
1061 #define HOTKEY_CONFIG_CRITICAL_END
1062 #endif /* CONFIG_THINKPAD_ACPI_HOTKEY_POLL */
1063
1064 /* HKEY.MHKG() return bits */
1065 #define TP_HOTKEY_TABLET_MASK (1 << 3)
1066
1067 static int hotkey_get_wlsw(int *status)
1068 {
1069 if (!acpi_evalf(hkey_handle, status, "WLSW", "d"))
1070 return -EIO;
1071 return 0;
1072 }
1073
1074 static int hotkey_get_tablet_mode(int *status)
1075 {
1076 int s;
1077
1078 if (!acpi_evalf(hkey_handle, &s, "MHKG", "d"))
1079 return -EIO;
1080
1081 return ((s & TP_HOTKEY_TABLET_MASK) != 0);
1082 }
1083
1084 /*
1085 * Call with hotkey_mutex held
1086 */
1087 static int hotkey_mask_get(void)
1088 {
1089 u32 m = 0;
1090
1091 if (tp_features.hotkey_mask) {
1092 if (!acpi_evalf(hkey_handle, &m, "DHKN", "d"))
1093 return -EIO;
1094 }
1095 hotkey_mask = m | (hotkey_source_mask & hotkey_mask);
1096
1097 return 0;
1098 }
1099
1100 /*
1101 * Call with hotkey_mutex held
1102 */
1103 static int hotkey_mask_set(u32 mask)
1104 {
1105 int i;
1106 int rc = 0;
1107
1108 if (tp_features.hotkey_mask) {
1109 HOTKEY_CONFIG_CRITICAL_START
1110 for (i = 0; i < 32; i++) {
1111 u32 m = 1 << i;
1112 /* enable in firmware mask only keys not in NVRAM
1113 * mode, but enable the key in the cached hotkey_mask
1114 * regardless of mode, or the key will end up
1115 * disabled by hotkey_mask_get() */
1116 if (!acpi_evalf(hkey_handle,
1117 NULL, "MHKM", "vdd", i + 1,
1118 !!((mask & ~hotkey_source_mask) & m))) {
1119 rc = -EIO;
1120 break;
1121 } else {
1122 hotkey_mask = (hotkey_mask & ~m) | (mask & m);
1123 }
1124 }
1125 HOTKEY_CONFIG_CRITICAL_END
1126
1127 /* hotkey_mask_get must be called unconditionally below */
1128 if (!hotkey_mask_get() && !rc &&
1129 (hotkey_mask & ~hotkey_source_mask) !=
1130 (mask & ~hotkey_source_mask)) {
1131 printk(TPACPI_NOTICE
1132 "requested hot key mask 0x%08x, but "
1133 "firmware forced it to 0x%08x\n",
1134 mask, hotkey_mask);
1135 }
1136 } else {
1137 #ifdef CONFIG_THINKPAD_ACPI_HOTKEY_POLL
1138 HOTKEY_CONFIG_CRITICAL_START
1139 hotkey_mask = mask & hotkey_source_mask;
1140 HOTKEY_CONFIG_CRITICAL_END
1141 hotkey_mask_get();
1142 if (hotkey_mask != mask) {
1143 printk(TPACPI_NOTICE
1144 "requested hot key mask 0x%08x, "
1145 "forced to 0x%08x (NVRAM poll mask is "
1146 "0x%08x): no firmware mask support\n",
1147 mask, hotkey_mask, hotkey_source_mask);
1148 }
1149 #else
1150 hotkey_mask_get();
1151 rc = -ENXIO;
1152 #endif /* CONFIG_THINKPAD_ACPI_HOTKEY_POLL */
1153 }
1154
1155 return rc;
1156 }
1157
1158 static int hotkey_status_get(int *status)
1159 {
1160 if (!acpi_evalf(hkey_handle, status, "DHKC", "d"))
1161 return -EIO;
1162
1163 return 0;
1164 }
1165
1166 static int hotkey_status_set(int status)
1167 {
1168 if (!acpi_evalf(hkey_handle, NULL, "MHKC", "vd", status))
1169 return -EIO;
1170
1171 return 0;
1172 }
1173
1174 static void tpacpi_input_send_radiosw(void)
1175 {
1176 int wlsw;
1177
1178 if (tp_features.hotkey_wlsw && !hotkey_get_wlsw(&wlsw)) {
1179 mutex_lock(&tpacpi_inputdev_send_mutex);
1180
1181 input_report_switch(tpacpi_inputdev,
1182 SW_RADIO, !!wlsw);
1183 input_sync(tpacpi_inputdev);
1184
1185 mutex_unlock(&tpacpi_inputdev_send_mutex);
1186 }
1187 }
1188
1189 static void tpacpi_input_send_tabletsw(void)
1190 {
1191 int state;
1192
1193 if (tp_features.hotkey_tablet &&
1194 !hotkey_get_tablet_mode(&state)) {
1195 mutex_lock(&tpacpi_inputdev_send_mutex);
1196
1197 input_report_switch(tpacpi_inputdev,
1198 SW_TABLET_MODE, !!state);
1199 input_sync(tpacpi_inputdev);
1200
1201 mutex_unlock(&tpacpi_inputdev_send_mutex);
1202 }
1203 }
1204
1205 static void tpacpi_input_send_key(unsigned int scancode)
1206 {
1207 unsigned int keycode;
1208
1209 keycode = hotkey_keycode_map[scancode];
1210
1211 if (keycode != KEY_RESERVED) {
1212 mutex_lock(&tpacpi_inputdev_send_mutex);
1213
1214 input_report_key(tpacpi_inputdev, keycode, 1);
1215 if (keycode == KEY_UNKNOWN)
1216 input_event(tpacpi_inputdev, EV_MSC, MSC_SCAN,
1217 scancode);
1218 input_sync(tpacpi_inputdev);
1219
1220 input_report_key(tpacpi_inputdev, keycode, 0);
1221 if (keycode == KEY_UNKNOWN)
1222 input_event(tpacpi_inputdev, EV_MSC, MSC_SCAN,
1223 scancode);
1224 input_sync(tpacpi_inputdev);
1225
1226 mutex_unlock(&tpacpi_inputdev_send_mutex);
1227 }
1228 }
1229
1230 #ifdef CONFIG_THINKPAD_ACPI_HOTKEY_POLL
1231 static struct tp_acpi_drv_struct ibm_hotkey_acpidriver;
1232
1233 static void tpacpi_hotkey_send_key(unsigned int scancode)
1234 {
1235 tpacpi_input_send_key(scancode);
1236 if (hotkey_report_mode < 2) {
1237 acpi_bus_generate_proc_event(ibm_hotkey_acpidriver.device,
1238 0x80, 0x1001 + scancode);
1239 }
1240 }
1241
1242 static void hotkey_read_nvram(struct tp_nvram_state *n, u32 m)
1243 {
1244 u8 d;
1245
1246 if (m & TP_NVRAM_HKEY_GROUP_HK2) {
1247 d = nvram_read_byte(TP_NVRAM_ADDR_HK2);
1248 n->thinkpad_toggle = !!(d & TP_NVRAM_MASK_HKT_THINKPAD);
1249 n->zoom_toggle = !!(d & TP_NVRAM_MASK_HKT_ZOOM);
1250 n->display_toggle = !!(d & TP_NVRAM_MASK_HKT_DISPLAY);
1251 n->hibernate_toggle = !!(d & TP_NVRAM_MASK_HKT_HIBERNATE);
1252 }
1253 if (m & TP_ACPI_HKEY_THNKLGHT_MASK) {
1254 d = nvram_read_byte(TP_NVRAM_ADDR_THINKLIGHT);
1255 n->thinklight_toggle = !!(d & TP_NVRAM_MASK_THINKLIGHT);
1256 }
1257 if (m & TP_ACPI_HKEY_DISPXPAND_MASK) {
1258 d = nvram_read_byte(TP_NVRAM_ADDR_VIDEO);
1259 n->displayexp_toggle =
1260 !!(d & TP_NVRAM_MASK_HKT_DISPEXPND);
1261 }
1262 if (m & TP_NVRAM_HKEY_GROUP_BRIGHTNESS) {
1263 d = nvram_read_byte(TP_NVRAM_ADDR_BRIGHTNESS);
1264 n->brightness_level = (d & TP_NVRAM_MASK_LEVEL_BRIGHTNESS)
1265 >> TP_NVRAM_POS_LEVEL_BRIGHTNESS;
1266 n->brightness_toggle =
1267 !!(d & TP_NVRAM_MASK_HKT_BRIGHTNESS);
1268 }
1269 if (m & TP_NVRAM_HKEY_GROUP_VOLUME) {
1270 d = nvram_read_byte(TP_NVRAM_ADDR_MIXER);
1271 n->volume_level = (d & TP_NVRAM_MASK_LEVEL_VOLUME)
1272 >> TP_NVRAM_POS_LEVEL_VOLUME;
1273 n->mute = !!(d & TP_NVRAM_MASK_MUTE);
1274 n->volume_toggle = !!(d & TP_NVRAM_MASK_HKT_VOLUME);
1275 }
1276 }
1277
1278 #define TPACPI_COMPARE_KEY(__scancode, __member) \
1279 do { \
1280 if ((mask & (1 << __scancode)) && \
1281 oldn->__member != newn->__member) \
1282 tpacpi_hotkey_send_key(__scancode); \
1283 } while (0)
1284
1285 #define TPACPI_MAY_SEND_KEY(__scancode) \
1286 do { if (mask & (1 << __scancode)) \
1287 tpacpi_hotkey_send_key(__scancode); } while (0)
1288
1289 static void hotkey_compare_and_issue_event(struct tp_nvram_state *oldn,
1290 struct tp_nvram_state *newn,
1291 u32 mask)
1292 {
1293 TPACPI_COMPARE_KEY(TP_ACPI_HOTKEYSCAN_THINKPAD, thinkpad_toggle);
1294 TPACPI_COMPARE_KEY(TP_ACPI_HOTKEYSCAN_FNSPACE, zoom_toggle);
1295 TPACPI_COMPARE_KEY(TP_ACPI_HOTKEYSCAN_FNF7, display_toggle);
1296 TPACPI_COMPARE_KEY(TP_ACPI_HOTKEYSCAN_FNF12, hibernate_toggle);
1297
1298 TPACPI_COMPARE_KEY(TP_ACPI_HOTKEYSCAN_FNPAGEUP, thinklight_toggle);
1299
1300 TPACPI_COMPARE_KEY(TP_ACPI_HOTKEYSCAN_FNF8, displayexp_toggle);
1301
1302 /* handle volume */
1303 if (oldn->volume_toggle != newn->volume_toggle) {
1304 if (oldn->mute != newn->mute) {
1305 TPACPI_MAY_SEND_KEY(TP_ACPI_HOTKEYSCAN_MUTE);
1306 }
1307 if (oldn->volume_level > newn->volume_level) {
1308 TPACPI_MAY_SEND_KEY(TP_ACPI_HOTKEYSCAN_VOLUMEDOWN);
1309 } else if (oldn->volume_level < newn->volume_level) {
1310 TPACPI_MAY_SEND_KEY(TP_ACPI_HOTKEYSCAN_VOLUMEUP);
1311 } else if (oldn->mute == newn->mute) {
1312 /* repeated key presses that didn't change state */
1313 if (newn->mute) {
1314 TPACPI_MAY_SEND_KEY(TP_ACPI_HOTKEYSCAN_MUTE);
1315 } else if (newn->volume_level != 0) {
1316 TPACPI_MAY_SEND_KEY(TP_ACPI_HOTKEYSCAN_VOLUMEUP);
1317 } else {
1318 TPACPI_MAY_SEND_KEY(TP_ACPI_HOTKEYSCAN_VOLUMEDOWN);
1319 }
1320 }
1321 }
1322
1323 /* handle brightness */
1324 if (oldn->brightness_toggle != newn->brightness_toggle) {
1325 if (oldn->brightness_level < newn->brightness_level) {
1326 TPACPI_MAY_SEND_KEY(TP_ACPI_HOTKEYSCAN_FNHOME);
1327 } else if (oldn->brightness_level > newn->brightness_level) {
1328 TPACPI_MAY_SEND_KEY(TP_ACPI_HOTKEYSCAN_FNEND);
1329 } else {
1330 /* repeated key presses that didn't change state */
1331 if (newn->brightness_level != 0) {
1332 TPACPI_MAY_SEND_KEY(TP_ACPI_HOTKEYSCAN_FNHOME);
1333 } else {
1334 TPACPI_MAY_SEND_KEY(TP_ACPI_HOTKEYSCAN_FNEND);
1335 }
1336 }
1337 }
1338 }
1339
1340 #undef TPACPI_COMPARE_KEY
1341 #undef TPACPI_MAY_SEND_KEY
1342
1343 static int hotkey_kthread(void *data)
1344 {
1345 struct tp_nvram_state s[2];
1346 u32 mask;
1347 unsigned int si, so;
1348 unsigned long t;
1349 unsigned int change_detector, must_reset;
1350
1351 mutex_lock(&hotkey_thread_mutex);
1352
1353 if (tpacpi_lifecycle == TPACPI_LIFE_EXITING)
1354 goto exit;
1355
1356 set_freezable();
1357
1358 so = 0;
1359 si = 1;
1360 t = 0;
1361
1362 /* Initial state for compares */
1363 mutex_lock(&hotkey_thread_data_mutex);
1364 change_detector = hotkey_config_change;
1365 mask = hotkey_source_mask & hotkey_mask;
1366 mutex_unlock(&hotkey_thread_data_mutex);
1367 hotkey_read_nvram(&s[so], mask);
1368
1369 while (!kthread_should_stop() && hotkey_poll_freq) {
1370 if (t == 0)
1371 t = 1000/hotkey_poll_freq;
1372 t = msleep_interruptible(t);
1373 if (unlikely(kthread_should_stop()))
1374 break;
1375 must_reset = try_to_freeze();
1376 if (t > 0 && !must_reset)
1377 continue;
1378
1379 mutex_lock(&hotkey_thread_data_mutex);
1380 if (must_reset || hotkey_config_change != change_detector) {
1381 /* forget old state on thaw or config change */
1382 si = so;
1383 t = 0;
1384 change_detector = hotkey_config_change;
1385 }
1386 mask = hotkey_source_mask & hotkey_mask;
1387 mutex_unlock(&hotkey_thread_data_mutex);
1388
1389 if (likely(mask)) {
1390 hotkey_read_nvram(&s[si], mask);
1391 if (likely(si != so)) {
1392 hotkey_compare_and_issue_event(&s[so], &s[si],
1393 mask);
1394 }
1395 }
1396
1397 so = si;
1398 si ^= 1;
1399 }
1400
1401 exit:
1402 mutex_unlock(&hotkey_thread_mutex);
1403 return 0;
1404 }
1405
1406 static void hotkey_poll_stop_sync(void)
1407 {
1408 if (tpacpi_hotkey_task) {
1409 if (frozen(tpacpi_hotkey_task) ||
1410 freezing(tpacpi_hotkey_task))
1411 thaw_process(tpacpi_hotkey_task);
1412
1413 kthread_stop(tpacpi_hotkey_task);
1414 tpacpi_hotkey_task = NULL;
1415 mutex_lock(&hotkey_thread_mutex);
1416 /* at this point, the thread did exit */
1417 mutex_unlock(&hotkey_thread_mutex);
1418 }
1419 }
1420
1421 /* call with hotkey_mutex held */
1422 static void hotkey_poll_setup(int may_warn)
1423 {
1424 if ((hotkey_source_mask & hotkey_mask) != 0 &&
1425 hotkey_poll_freq > 0 &&
1426 (tpacpi_inputdev->users > 0 || hotkey_report_mode < 2)) {
1427 if (!tpacpi_hotkey_task) {
1428 tpacpi_hotkey_task = kthread_run(hotkey_kthread,
1429 NULL,
1430 TPACPI_FILE "d");
1431 if (IS_ERR(tpacpi_hotkey_task)) {
1432 tpacpi_hotkey_task = NULL;
1433 printk(TPACPI_ERR
1434 "could not create kernel thread "
1435 "for hotkey polling\n");
1436 }
1437 }
1438 } else {
1439 hotkey_poll_stop_sync();
1440 if (may_warn &&
1441 hotkey_source_mask != 0 && hotkey_poll_freq == 0) {
1442 printk(TPACPI_NOTICE
1443 "hot keys 0x%08x require polling, "
1444 "which is currently disabled\n",
1445 hotkey_source_mask);
1446 }
1447 }
1448 }
1449
1450 static void hotkey_poll_setup_safe(int may_warn)
1451 {
1452 mutex_lock(&hotkey_mutex);
1453 hotkey_poll_setup(may_warn);
1454 mutex_unlock(&hotkey_mutex);
1455 }
1456
1457 #else /* CONFIG_THINKPAD_ACPI_HOTKEY_POLL */
1458
1459 static void hotkey_poll_setup_safe(int __unused)
1460 {
1461 }
1462
1463 #endif /* CONFIG_THINKPAD_ACPI_HOTKEY_POLL */
1464
1465 static int hotkey_inputdev_open(struct input_dev *dev)
1466 {
1467 switch (tpacpi_lifecycle) {
1468 case TPACPI_LIFE_INIT:
1469 /*
1470 * hotkey_init will call hotkey_poll_setup_safe
1471 * at the appropriate moment
1472 */
1473 return 0;
1474 case TPACPI_LIFE_EXITING:
1475 return -EBUSY;
1476 case TPACPI_LIFE_RUNNING:
1477 hotkey_poll_setup_safe(0);
1478 return 0;
1479 }
1480
1481 /* Should only happen if tpacpi_lifecycle is corrupt */
1482 BUG();
1483 return -EBUSY;
1484 }
1485
1486 static void hotkey_inputdev_close(struct input_dev *dev)
1487 {
1488 /* disable hotkey polling when possible */
1489 if (tpacpi_lifecycle == TPACPI_LIFE_RUNNING)
1490 hotkey_poll_setup_safe(0);
1491 }
1492
1493 /* sysfs hotkey enable ------------------------------------------------- */
1494 static ssize_t hotkey_enable_show(struct device *dev,
1495 struct device_attribute *attr,
1496 char *buf)
1497 {
1498 int res, status;
1499
1500 res = hotkey_status_get(&status);
1501 if (res)
1502 return res;
1503
1504 return snprintf(buf, PAGE_SIZE, "%d\n", status);
1505 }
1506
1507 static ssize_t hotkey_enable_store(struct device *dev,
1508 struct device_attribute *attr,
1509 const char *buf, size_t count)
1510 {
1511 unsigned long t;
1512 int res;
1513
1514 if (parse_strtoul(buf, 1, &t))
1515 return -EINVAL;
1516
1517 res = hotkey_status_set(t);
1518
1519 return (res) ? res : count;
1520 }
1521
1522 static struct device_attribute dev_attr_hotkey_enable =
1523 __ATTR(hotkey_enable, S_IWUSR | S_IRUGO,
1524 hotkey_enable_show, hotkey_enable_store);
1525
1526 /* sysfs hotkey mask --------------------------------------------------- */
1527 static ssize_t hotkey_mask_show(struct device *dev,
1528 struct device_attribute *attr,
1529 char *buf)
1530 {
1531 int res;
1532
1533 if (mutex_lock_interruptible(&hotkey_mutex))
1534 return -ERESTARTSYS;
1535 res = hotkey_mask_get();
1536 mutex_unlock(&hotkey_mutex);
1537
1538 return (res)?
1539 res : snprintf(buf, PAGE_SIZE, "0x%08x\n", hotkey_mask);
1540 }
1541
1542 static ssize_t hotkey_mask_store(struct device *dev,
1543 struct device_attribute *attr,
1544 const char *buf, size_t count)
1545 {
1546 unsigned long t;
1547 int res;
1548
1549 if (parse_strtoul(buf, 0xffffffffUL, &t))
1550 return -EINVAL;
1551
1552 if (mutex_lock_interruptible(&hotkey_mutex))
1553 return -ERESTARTSYS;
1554
1555 res = hotkey_mask_set(t);
1556
1557 #ifdef CONFIG_THINKPAD_ACPI_HOTKEY_POLL
1558 hotkey_poll_setup(1);
1559 #endif
1560
1561 mutex_unlock(&hotkey_mutex);
1562
1563 return (res) ? res : count;
1564 }
1565
1566 static struct device_attribute dev_attr_hotkey_mask =
1567 __ATTR(hotkey_mask, S_IWUSR | S_IRUGO,
1568 hotkey_mask_show, hotkey_mask_store);
1569
1570 /* sysfs hotkey bios_enabled ------------------------------------------- */
1571 static ssize_t hotkey_bios_enabled_show(struct device *dev,
1572 struct device_attribute *attr,
1573 char *buf)
1574 {
1575 return snprintf(buf, PAGE_SIZE, "%d\n", hotkey_orig_status);
1576 }
1577
1578 static struct device_attribute dev_attr_hotkey_bios_enabled =
1579 __ATTR(hotkey_bios_enabled, S_IRUGO, hotkey_bios_enabled_show, NULL);
1580
1581 /* sysfs hotkey bios_mask ---------------------------------------------- */
1582 static ssize_t hotkey_bios_mask_show(struct device *dev,
1583 struct device_attribute *attr,
1584 char *buf)
1585 {
1586 return snprintf(buf, PAGE_SIZE, "0x%08x\n", hotkey_orig_mask);
1587 }
1588
1589 static struct device_attribute dev_attr_hotkey_bios_mask =
1590 __ATTR(hotkey_bios_mask, S_IRUGO, hotkey_bios_mask_show, NULL);
1591
1592 /* sysfs hotkey all_mask ----------------------------------------------- */
1593 static ssize_t hotkey_all_mask_show(struct device *dev,
1594 struct device_attribute *attr,
1595 char *buf)
1596 {
1597 return snprintf(buf, PAGE_SIZE, "0x%08x\n",
1598 hotkey_all_mask | hotkey_source_mask);
1599 }
1600
1601 static struct device_attribute dev_attr_hotkey_all_mask =
1602 __ATTR(hotkey_all_mask, S_IRUGO, hotkey_all_mask_show, NULL);
1603
1604 /* sysfs hotkey recommended_mask --------------------------------------- */
1605 static ssize_t hotkey_recommended_mask_show(struct device *dev,
1606 struct device_attribute *attr,
1607 char *buf)
1608 {
1609 return snprintf(buf, PAGE_SIZE, "0x%08x\n",
1610 (hotkey_all_mask | hotkey_source_mask)
1611 & ~hotkey_reserved_mask);
1612 }
1613
1614 static struct device_attribute dev_attr_hotkey_recommended_mask =
1615 __ATTR(hotkey_recommended_mask, S_IRUGO,
1616 hotkey_recommended_mask_show, NULL);
1617
1618 #ifdef CONFIG_THINKPAD_ACPI_HOTKEY_POLL
1619
1620 /* sysfs hotkey hotkey_source_mask ------------------------------------- */
1621 static ssize_t hotkey_source_mask_show(struct device *dev,
1622 struct device_attribute *attr,
1623 char *buf)
1624 {
1625 return snprintf(buf, PAGE_SIZE, "0x%08x\n", hotkey_source_mask);
1626 }
1627
1628 static ssize_t hotkey_source_mask_store(struct device *dev,
1629 struct device_attribute *attr,
1630 const char *buf, size_t count)
1631 {
1632 unsigned long t;
1633
1634 if (parse_strtoul(buf, 0xffffffffUL, &t) ||
1635 ((t & ~TPACPI_HKEY_NVRAM_KNOWN_MASK) != 0))
1636 return -EINVAL;
1637
1638 if (mutex_lock_interruptible(&hotkey_mutex))
1639 return -ERESTARTSYS;
1640
1641 HOTKEY_CONFIG_CRITICAL_START
1642 hotkey_source_mask = t;
1643 HOTKEY_CONFIG_CRITICAL_END
1644
1645 hotkey_poll_setup(1);
1646
1647 mutex_unlock(&hotkey_mutex);
1648
1649 return count;
1650 }
1651
1652 static struct device_attribute dev_attr_hotkey_source_mask =
1653 __ATTR(hotkey_source_mask, S_IWUSR | S_IRUGO,
1654 hotkey_source_mask_show, hotkey_source_mask_store);
1655
1656 /* sysfs hotkey hotkey_poll_freq --------------------------------------- */
1657 static ssize_t hotkey_poll_freq_show(struct device *dev,
1658 struct device_attribute *attr,
1659 char *buf)
1660 {
1661 return snprintf(buf, PAGE_SIZE, "%d\n", hotkey_poll_freq);
1662 }
1663
1664 static ssize_t hotkey_poll_freq_store(struct device *dev,
1665 struct device_attribute *attr,
1666 const char *buf, size_t count)
1667 {
1668 unsigned long t;
1669
1670 if (parse_strtoul(buf, 25, &t))
1671 return -EINVAL;
1672
1673 if (mutex_lock_interruptible(&hotkey_mutex))
1674 return -ERESTARTSYS;
1675
1676 hotkey_poll_freq = t;
1677
1678 hotkey_poll_setup(1);
1679 mutex_unlock(&hotkey_mutex);
1680
1681 return count;
1682 }
1683
1684 static struct device_attribute dev_attr_hotkey_poll_freq =
1685 __ATTR(hotkey_poll_freq, S_IWUSR | S_IRUGO,
1686 hotkey_poll_freq_show, hotkey_poll_freq_store);
1687
1688 #endif /* CONFIG_THINKPAD_ACPI_HOTKEY_POLL */
1689
1690 /* sysfs hotkey radio_sw (pollable) ------------------------------------ */
1691 static ssize_t hotkey_radio_sw_show(struct device *dev,
1692 struct device_attribute *attr,
1693 char *buf)
1694 {
1695 int res, s;
1696 res = hotkey_get_wlsw(&s);
1697 if (res < 0)
1698 return res;
1699
1700 return snprintf(buf, PAGE_SIZE, "%d\n", !!s);
1701 }
1702
1703 static struct device_attribute dev_attr_hotkey_radio_sw =
1704 __ATTR(hotkey_radio_sw, S_IRUGO, hotkey_radio_sw_show, NULL);
1705
1706 static void hotkey_radio_sw_notify_change(void)
1707 {
1708 if (tp_features.hotkey_wlsw)
1709 sysfs_notify(&tpacpi_pdev->dev.kobj, NULL,
1710 "hotkey_radio_sw");
1711 }
1712
1713 /* sysfs hotkey tablet mode (pollable) --------------------------------- */
1714 static ssize_t hotkey_tablet_mode_show(struct device *dev,
1715 struct device_attribute *attr,
1716 char *buf)
1717 {
1718 int res, s;
1719 res = hotkey_get_tablet_mode(&s);
1720 if (res < 0)
1721 return res;
1722
1723 return snprintf(buf, PAGE_SIZE, "%d\n", !!s);
1724 }
1725
1726 static struct device_attribute dev_attr_hotkey_tablet_mode =
1727 __ATTR(hotkey_tablet_mode, S_IRUGO, hotkey_tablet_mode_show, NULL);
1728
1729 static void hotkey_tablet_mode_notify_change(void)
1730 {
1731 if (tp_features.hotkey_tablet)
1732 sysfs_notify(&tpacpi_pdev->dev.kobj, NULL,
1733 "hotkey_tablet_mode");
1734 }
1735
1736 /* sysfs hotkey report_mode -------------------------------------------- */
1737 static ssize_t hotkey_report_mode_show(struct device *dev,
1738 struct device_attribute *attr,
1739 char *buf)
1740 {
1741 return snprintf(buf, PAGE_SIZE, "%d\n",
1742 (hotkey_report_mode != 0) ? hotkey_report_mode : 1);
1743 }
1744
1745 static struct device_attribute dev_attr_hotkey_report_mode =
1746 __ATTR(hotkey_report_mode, S_IRUGO, hotkey_report_mode_show, NULL);
1747
1748 /* sysfs wakeup reason (pollable) -------------------------------------- */
1749 static ssize_t hotkey_wakeup_reason_show(struct device *dev,
1750 struct device_attribute *attr,
1751 char *buf)
1752 {
1753 return snprintf(buf, PAGE_SIZE, "%d\n", hotkey_wakeup_reason);
1754 }
1755
1756 static struct device_attribute dev_attr_hotkey_wakeup_reason =
1757 __ATTR(wakeup_reason, S_IRUGO, hotkey_wakeup_reason_show, NULL);
1758
1759 static void hotkey_wakeup_reason_notify_change(void)
1760 {
1761 if (tp_features.hotkey_mask)
1762 sysfs_notify(&tpacpi_pdev->dev.kobj, NULL,
1763 "wakeup_reason");
1764 }
1765
1766 /* sysfs wakeup hotunplug_complete (pollable) -------------------------- */
1767 static ssize_t hotkey_wakeup_hotunplug_complete_show(struct device *dev,
1768 struct device_attribute *attr,
1769 char *buf)
1770 {
1771 return snprintf(buf, PAGE_SIZE, "%d\n", hotkey_autosleep_ack);
1772 }
1773
1774 static struct device_attribute dev_attr_hotkey_wakeup_hotunplug_complete =
1775 __ATTR(wakeup_hotunplug_complete, S_IRUGO,
1776 hotkey_wakeup_hotunplug_complete_show, NULL);
1777
1778 static void hotkey_wakeup_hotunplug_complete_notify_change(void)
1779 {
1780 if (tp_features.hotkey_mask)
1781 sysfs_notify(&tpacpi_pdev->dev.kobj, NULL,
1782 "wakeup_hotunplug_complete");
1783 }
1784
1785 /* --------------------------------------------------------------------- */
1786
1787 static struct attribute *hotkey_attributes[] __initdata = {
1788 &dev_attr_hotkey_enable.attr,
1789 &dev_attr_hotkey_bios_enabled.attr,
1790 &dev_attr_hotkey_report_mode.attr,
1791 #ifdef CONFIG_THINKPAD_ACPI_HOTKEY_POLL
1792 &dev_attr_hotkey_mask.attr,
1793 &dev_attr_hotkey_all_mask.attr,
1794 &dev_attr_hotkey_recommended_mask.attr,
1795 &dev_attr_hotkey_source_mask.attr,
1796 &dev_attr_hotkey_poll_freq.attr,
1797 #endif
1798 };
1799
1800 static struct attribute *hotkey_mask_attributes[] __initdata = {
1801 &dev_attr_hotkey_bios_mask.attr,
1802 #ifndef CONFIG_THINKPAD_ACPI_HOTKEY_POLL
1803 &dev_attr_hotkey_mask.attr,
1804 &dev_attr_hotkey_all_mask.attr,
1805 &dev_attr_hotkey_recommended_mask.attr,
1806 #endif
1807 &dev_attr_hotkey_wakeup_reason.attr,
1808 &dev_attr_hotkey_wakeup_hotunplug_complete.attr,
1809 };
1810
1811 static int __init hotkey_init(struct ibm_init_struct *iibm)
1812 {
1813 /* Requirements for changing the default keymaps:
1814 *
1815 * 1. Many of the keys are mapped to KEY_RESERVED for very
1816 * good reasons. Do not change them unless you have deep
1817 * knowledge on the IBM and Lenovo ThinkPad firmware for
1818 * the various ThinkPad models. The driver behaves
1819 * differently for KEY_RESERVED: such keys have their
1820 * hot key mask *unset* in mask_recommended, and also
1821 * in the initial hot key mask programmed into the
1822 * firmware at driver load time, which means the firm-
1823 * ware may react very differently if you change them to
1824 * something else;
1825 *
1826 * 2. You must be subscribed to the linux-thinkpad and
1827 * ibm-acpi-devel mailing lists, and you should read the
1828 * list archives since 2007 if you want to change the
1829 * keymaps. This requirement exists so that you will
1830 * know the past history of problems with the thinkpad-
1831 * acpi driver keymaps, and also that you will be
1832 * listening to any bug reports;
1833 *
1834 * 3. Do not send thinkpad-acpi specific patches directly to
1835 * for merging, *ever*. Send them to the linux-acpi
1836 * mailinglist for comments. Merging is to be done only
1837 * through acpi-test and the ACPI maintainer.
1838 *
1839 * If the above is too much to ask, don't change the keymap.
1840 * Ask the thinkpad-acpi maintainer to do it, instead.
1841 */
1842 static u16 ibm_keycode_map[] __initdata = {
1843 /* Scan Codes 0x00 to 0x0B: ACPI HKEY FN+F1..F12 */
1844 KEY_FN_F1, KEY_FN_F2, KEY_COFFEE, KEY_SLEEP,
1845 KEY_WLAN, KEY_FN_F6, KEY_SWITCHVIDEOMODE, KEY_FN_F8,
1846 KEY_FN_F9, KEY_FN_F10, KEY_FN_F11, KEY_SUSPEND,
1847
1848 /* Scan codes 0x0C to 0x1F: Other ACPI HKEY hot keys */
1849 KEY_UNKNOWN, /* 0x0C: FN+BACKSPACE */
1850 KEY_UNKNOWN, /* 0x0D: FN+INSERT */
1851 KEY_UNKNOWN, /* 0x0E: FN+DELETE */
1852
1853 /* brightness: firmware always reacts to them, unless
1854 * X.org did some tricks in the radeon BIOS scratch
1855 * registers of *some* models */
1856 KEY_RESERVED, /* 0x0F: FN+HOME (brightness up) */
1857 KEY_RESERVED, /* 0x10: FN+END (brightness down) */
1858
1859 /* Thinklight: firmware always react to it */
1860 KEY_RESERVED, /* 0x11: FN+PGUP (thinklight toggle) */
1861
1862 KEY_UNKNOWN, /* 0x12: FN+PGDOWN */
1863 KEY_ZOOM, /* 0x13: FN+SPACE (zoom) */
1864
1865 /* Volume: firmware always react to it and reprograms
1866 * the built-in *extra* mixer. Never map it to control
1867 * another mixer by default. */
1868 KEY_RESERVED, /* 0x14: VOLUME UP */
1869 KEY_RESERVED, /* 0x15: VOLUME DOWN */
1870 KEY_RESERVED, /* 0x16: MUTE */
1871
1872 KEY_VENDOR, /* 0x17: Thinkpad/AccessIBM/Lenovo */
1873
1874 /* (assignments unknown, please report if found) */
1875 KEY_UNKNOWN, KEY_UNKNOWN, KEY_UNKNOWN, KEY_UNKNOWN,
1876 KEY_UNKNOWN, KEY_UNKNOWN, KEY_UNKNOWN, KEY_UNKNOWN,
1877 };
1878 static u16 lenovo_keycode_map[] __initdata = {
1879 /* Scan Codes 0x00 to 0x0B: ACPI HKEY FN+F1..F12 */
1880 KEY_FN_F1, KEY_COFFEE, KEY_BATTERY, KEY_SLEEP,
1881 KEY_WLAN, KEY_FN_F6, KEY_SWITCHVIDEOMODE, KEY_FN_F8,
1882 KEY_FN_F9, KEY_FN_F10, KEY_FN_F11, KEY_SUSPEND,
1883
1884 /* Scan codes 0x0C to 0x1F: Other ACPI HKEY hot keys */
1885 KEY_UNKNOWN, /* 0x0C: FN+BACKSPACE */
1886 KEY_UNKNOWN, /* 0x0D: FN+INSERT */
1887 KEY_UNKNOWN, /* 0x0E: FN+DELETE */
1888
1889 KEY_RESERVED, /* 0x0F: FN+HOME (brightness up) */
1890 KEY_RESERVED, /* 0x10: FN+END (brightness down) */
1891
1892 KEY_RESERVED, /* 0x11: FN+PGUP (thinklight toggle) */
1893
1894 KEY_UNKNOWN, /* 0x12: FN+PGDOWN */
1895 KEY_ZOOM, /* 0x13: FN+SPACE (zoom) */
1896
1897 /* Volume: z60/z61, T60 (BIOS version?): firmware always
1898 * react to it and reprograms the built-in *extra* mixer.
1899 * Never map it to control another mixer by default.
1900 *
1901 * T60?, T61, R60?, R61: firmware and EC tries to send
1902 * these over the regular keyboard, so these are no-ops,
1903 * but there are still weird bugs re. MUTE, so do not
1904 * change unless you get test reports from all Lenovo
1905 * models. May cause the BIOS to interfere with the
1906 * HDA mixer.
1907 */
1908 KEY_RESERVED, /* 0x14: VOLUME UP */
1909 KEY_RESERVED, /* 0x15: VOLUME DOWN */
1910 KEY_RESERVED, /* 0x16: MUTE */
1911
1912 KEY_VENDOR, /* 0x17: Thinkpad/AccessIBM/Lenovo */
1913
1914 /* (assignments unknown, please report if found) */
1915 KEY_UNKNOWN, KEY_UNKNOWN, KEY_UNKNOWN, KEY_UNKNOWN,
1916 KEY_UNKNOWN, KEY_UNKNOWN, KEY_UNKNOWN, KEY_UNKNOWN,
1917 };
1918
1919 #define TPACPI_HOTKEY_MAP_LEN ARRAY_SIZE(ibm_keycode_map)
1920 #define TPACPI_HOTKEY_MAP_SIZE sizeof(ibm_keycode_map)
1921 #define TPACPI_HOTKEY_MAP_TYPESIZE sizeof(ibm_keycode_map[0])
1922
1923 int res, i;
1924 int status;
1925 int hkeyv;
1926
1927 vdbg_printk(TPACPI_DBG_INIT, "initializing hotkey subdriver\n");
1928
1929 BUG_ON(!tpacpi_inputdev);
1930 BUG_ON(tpacpi_inputdev->open != NULL ||
1931 tpacpi_inputdev->close != NULL);
1932
1933 TPACPI_ACPIHANDLE_INIT(hkey);
1934 mutex_init(&hotkey_mutex);
1935
1936 #ifdef CONFIG_THINKPAD_ACPI_HOTKEY_POLL
1937 mutex_init(&hotkey_thread_mutex);
1938 mutex_init(&hotkey_thread_data_mutex);
1939 #endif
1940
1941 /* hotkey not supported on 570 */
1942 tp_features.hotkey = hkey_handle != NULL;
1943
1944 vdbg_printk(TPACPI_DBG_INIT, "hotkeys are %s\n",
1945 str_supported(tp_features.hotkey));
1946
1947 if (tp_features.hotkey) {
1948 hotkey_dev_attributes = create_attr_set(13, NULL);
1949 if (!hotkey_dev_attributes)
1950 return -ENOMEM;
1951 res = add_many_to_attr_set(hotkey_dev_attributes,
1952 hotkey_attributes,
1953 ARRAY_SIZE(hotkey_attributes));
1954 if (res)
1955 return res;
1956
1957 /* mask not supported on 570, 600e/x, 770e, 770x, A21e, A2xm/p,
1958 A30, R30, R31, T20-22, X20-21, X22-24. Detected by checking
1959 for HKEY interface version 0x100 */
1960 if (acpi_evalf(hkey_handle, &hkeyv, "MHKV", "qd")) {
1961 if ((hkeyv >> 8) != 1) {
1962 printk(TPACPI_ERR "unknown version of the "
1963 "HKEY interface: 0x%x\n", hkeyv);
1964 printk(TPACPI_ERR "please report this to %s\n",
1965 TPACPI_MAIL);
1966 } else {
1967 /*
1968 * MHKV 0x100 in A31, R40, R40e,
1969 * T4x, X31, and later
1970 */
1971 tp_features.hotkey_mask = 1;
1972 }
1973 }
1974
1975 vdbg_printk(TPACPI_DBG_INIT, "hotkey masks are %s\n",
1976 str_supported(tp_features.hotkey_mask));
1977
1978 if (tp_features.hotkey_mask) {
1979 if (!acpi_evalf(hkey_handle, &hotkey_all_mask,
1980 "MHKA", "qd")) {
1981 printk(TPACPI_ERR
1982 "missing MHKA handler, "
1983 "please report this to %s\n",
1984 TPACPI_MAIL);
1985 /* FN+F12, FN+F4, FN+F3 */
1986 hotkey_all_mask = 0x080cU;
1987 }
1988 }
1989
1990 /* hotkey_source_mask *must* be zero for
1991 * the first hotkey_mask_get */
1992 res = hotkey_status_get(&hotkey_orig_status);
1993 if (!res && tp_features.hotkey_mask) {
1994 res = hotkey_mask_get();
1995 hotkey_orig_mask = hotkey_mask;
1996 if (!res) {
1997 res = add_many_to_attr_set(
1998 hotkey_dev_attributes,
1999 hotkey_mask_attributes,
2000 ARRAY_SIZE(hotkey_mask_attributes));
2001 }
2002 }
2003
2004 #ifdef CONFIG_THINKPAD_ACPI_HOTKEY_POLL
2005 if (tp_features.hotkey_mask) {
2006 hotkey_source_mask = TPACPI_HKEY_NVRAM_GOOD_MASK
2007 & ~hotkey_all_mask;
2008 } else {
2009 hotkey_source_mask = TPACPI_HKEY_NVRAM_GOOD_MASK;
2010 }
2011
2012 vdbg_printk(TPACPI_DBG_INIT,
2013 "hotkey source mask 0x%08x, polling freq %d\n",
2014 hotkey_source_mask, hotkey_poll_freq);
2015 #endif
2016
2017 /* Not all thinkpads have a hardware radio switch */
2018 if (!res && acpi_evalf(hkey_handle, &status, "WLSW", "qd")) {
2019 tp_features.hotkey_wlsw = 1;
2020 printk(TPACPI_INFO
2021 "radio switch found; radios are %s\n",
2022 enabled(status, 0));
2023 res = add_to_attr_set(hotkey_dev_attributes,
2024 &dev_attr_hotkey_radio_sw.attr);
2025 }
2026
2027 /* For X41t, X60t, X61t Tablets... */
2028 if (!res && acpi_evalf(hkey_handle, &status, "MHKG", "qd")) {
2029 tp_features.hotkey_tablet = 1;
2030 printk(TPACPI_INFO
2031 "possible tablet mode switch found; "
2032 "ThinkPad in %s mode\n",
2033 (status & TP_HOTKEY_TABLET_MASK)?
2034 "tablet" : "laptop");
2035 res = add_to_attr_set(hotkey_dev_attributes,
2036 &dev_attr_hotkey_tablet_mode.attr);
2037 }
2038
2039 if (!res)
2040 res = register_attr_set_with_sysfs(
2041 hotkey_dev_attributes,
2042 &tpacpi_pdev->dev.kobj);
2043 if (res)
2044 return res;
2045
2046 /* Set up key map */
2047
2048 hotkey_keycode_map = kmalloc(TPACPI_HOTKEY_MAP_SIZE,
2049 GFP_KERNEL);
2050 if (!hotkey_keycode_map) {
2051 printk(TPACPI_ERR
2052 "failed to allocate memory for key map\n");
2053 return -ENOMEM;
2054 }
2055
2056 if (thinkpad_id.vendor == PCI_VENDOR_ID_LENOVO) {
2057 dbg_printk(TPACPI_DBG_INIT,
2058 "using Lenovo default hot key map\n");
2059 memcpy(hotkey_keycode_map, &lenovo_keycode_map,
2060 TPACPI_HOTKEY_MAP_SIZE);
2061 } else {
2062 dbg_printk(TPACPI_DBG_INIT,
2063 "using IBM default hot key map\n");
2064 memcpy(hotkey_keycode_map, &ibm_keycode_map,
2065 TPACPI_HOTKEY_MAP_SIZE);
2066 }
2067
2068 set_bit(EV_KEY, tpacpi_inputdev->evbit);
2069 set_bit(EV_MSC, tpacpi_inputdev->evbit);
2070 set_bit(MSC_SCAN, tpacpi_inputdev->mscbit);
2071 tpacpi_inputdev->keycodesize = TPACPI_HOTKEY_MAP_TYPESIZE;
2072 tpacpi_inputdev->keycodemax = TPACPI_HOTKEY_MAP_LEN;
2073 tpacpi_inputdev->keycode = hotkey_keycode_map;
2074 for (i = 0; i < TPACPI_HOTKEY_MAP_LEN; i++) {
2075 if (hotkey_keycode_map[i] != KEY_RESERVED) {
2076 set_bit(hotkey_keycode_map[i],
2077 tpacpi_inputdev->keybit);
2078 } else {
2079 if (i < sizeof(hotkey_reserved_mask)*8)
2080 hotkey_reserved_mask |= 1 << i;
2081 }
2082 }
2083
2084 if (tp_features.hotkey_wlsw) {
2085 set_bit(EV_SW, tpacpi_inputdev->evbit);
2086 set_bit(SW_RADIO, tpacpi_inputdev->swbit);
2087 }
2088 if (tp_features.hotkey_tablet) {
2089 set_bit(EV_SW, tpacpi_inputdev->evbit);
2090 set_bit(SW_TABLET_MODE, tpacpi_inputdev->swbit);
2091 }
2092
2093 dbg_printk(TPACPI_DBG_INIT,
2094 "enabling hot key handling\n");
2095 res = hotkey_status_set(1);
2096 if (res)
2097 return res;
2098 res = hotkey_mask_set(((hotkey_all_mask | hotkey_source_mask)
2099 & ~hotkey_reserved_mask)
2100 | hotkey_orig_mask);
2101 if (res < 0 && res != -ENXIO)
2102 return res;
2103
2104 dbg_printk(TPACPI_DBG_INIT,
2105 "legacy hot key reporting over procfs %s\n",
2106 (hotkey_report_mode < 2) ?
2107 "enabled" : "disabled");
2108
2109 tpacpi_inputdev->open = &hotkey_inputdev_open;
2110 tpacpi_inputdev->close = &hotkey_inputdev_close;
2111
2112 hotkey_poll_setup_safe(1);
2113 tpacpi_input_send_radiosw();
2114 tpacpi_input_send_tabletsw();
2115 }
2116
2117 return (tp_features.hotkey)? 0 : 1;
2118 }
2119
2120 static void hotkey_exit(void)
2121 {
2122 #ifdef CONFIG_THINKPAD_ACPI_HOTKEY_POLL
2123 hotkey_poll_stop_sync();
2124 #endif
2125
2126 if (tp_features.hotkey) {
2127 dbg_printk(TPACPI_DBG_EXIT,
2128 "restoring original hot key mask\n");
2129 /* no short-circuit boolean operator below! */
2130 if ((hotkey_mask_set(hotkey_orig_mask) |
2131 hotkey_status_set(hotkey_orig_status)) != 0)
2132 printk(TPACPI_ERR
2133 "failed to restore hot key mask "
2134 "to BIOS defaults\n");
2135 }
2136
2137 if (hotkey_dev_attributes) {
2138 delete_attr_set(hotkey_dev_attributes, &tpacpi_pdev->dev.kobj);
2139 hotkey_dev_attributes = NULL;
2140 }
2141 }
2142
2143 static void hotkey_notify(struct ibm_struct *ibm, u32 event)
2144 {
2145 u32 hkey;
2146 unsigned int scancode;
2147 int send_acpi_ev;
2148 int ignore_acpi_ev;
2149 int unk_ev;
2150
2151 if (event != 0x80) {
2152 printk(TPACPI_ERR
2153 "unknown HKEY notification event %d\n", event);
2154 /* forward it to userspace, maybe it knows how to handle it */
2155 acpi_bus_generate_netlink_event(
2156 ibm->acpi->device->pnp.device_class,
2157 ibm->acpi->device->dev.bus_id,
2158 event, 0);
2159 return;
2160 }
2161
2162 while (1) {
2163 if (!acpi_evalf(hkey_handle, &hkey, "MHKP", "d")) {
2164 printk(TPACPI_ERR "failed to retrieve HKEY event\n");
2165 return;
2166 }
2167
2168 if (hkey == 0) {
2169 /* queue empty */
2170 return;
2171 }
2172
2173 send_acpi_ev = 1;
2174 ignore_acpi_ev = 0;
2175 unk_ev = 0;
2176
2177 switch (hkey >> 12) {
2178 case 1:
2179 /* 0x1000-0x1FFF: key presses */
2180 scancode = hkey & 0xfff;
2181 if (scancode > 0 && scancode < 0x21) {
2182 scancode--;
2183 if (!(hotkey_source_mask & (1 << scancode))) {
2184 tpacpi_input_send_key(scancode);
2185 send_acpi_ev = 0;
2186 } else {
2187 ignore_acpi_ev = 1;
2188 }
2189 } else {
2190 unk_ev = 1;
2191 }
2192 break;
2193 case 2:
2194 /* Wakeup reason */
2195 switch (hkey) {
2196 case 0x2304: /* suspend, undock */
2197 case 0x2404: /* hibernation, undock */
2198 hotkey_wakeup_reason = TP_ACPI_WAKEUP_UNDOCK;
2199 ignore_acpi_ev = 1;
2200 break;
2201 case 0x2305: /* suspend, bay eject */
2202 case 0x2405: /* hibernation, bay eject */
2203 hotkey_wakeup_reason = TP_ACPI_WAKEUP_BAYEJ;
2204 ignore_acpi_ev = 1;
2205 break;
2206 default:
2207 unk_ev = 1;
2208 }
2209 if (hotkey_wakeup_reason != TP_ACPI_WAKEUP_NONE) {
2210 printk(TPACPI_INFO
2211 "woke up due to a hot-unplug "
2212 "request...\n");
2213 hotkey_wakeup_reason_notify_change();
2214 }
2215 break;
2216 case 3:
2217 /* bay-related wakeups */
2218 if (hkey == 0x3003) {
2219 hotkey_autosleep_ack = 1;
2220 printk(TPACPI_INFO
2221 "bay ejected\n");
2222 hotkey_wakeup_hotunplug_complete_notify_change();
2223 } else {
2224 unk_ev = 1;
2225 }
2226 break;
2227 case 4:
2228 /* dock-related wakeups */
2229 if (hkey == 0x4003) {
2230 hotkey_autosleep_ack = 1;
2231 printk(TPACPI_INFO
2232 "undocked\n");
2233 hotkey_wakeup_hotunplug_complete_notify_change();
2234 } else {
2235 unk_ev = 1;
2236 }
2237 break;
2238 case 5:
2239 /* 0x5000-0x5FFF: human interface helpers */
2240 switch (hkey) {
2241 case 0x5010: /* Lenovo new BIOS: brightness changed */
2242 case 0x500b: /* X61t: tablet pen inserted into bay */
2243 case 0x500c: /* X61t: tablet pen removed from bay */
2244 break;
2245 case 0x5009: /* X41t-X61t: swivel up (tablet mode) */
2246 case 0x500a: /* X41t-X61t: swivel down (normal mode) */
2247 tpacpi_input_send_tabletsw();
2248 hotkey_tablet_mode_notify_change();
2249 send_acpi_ev = 0;
2250 break;
2251 case 0x5001:
2252 case 0x5002:
2253 /* LID switch events. Do not propagate */
2254 ignore_acpi_ev = 1;
2255 break;
2256 default:
2257 unk_ev = 1;
2258 }
2259 break;
2260 case 7:
2261 /* 0x7000-0x7FFF: misc */
2262 if (tp_features.hotkey_wlsw && hkey == 0x7000) {
2263 tpacpi_input_send_radiosw();
2264 hotkey_radio_sw_notify_change();
2265 send_acpi_ev = 0;
2266 break;
2267 }
2268 /* fallthrough to default */
2269 default:
2270 unk_ev = 1;
2271 }
2272 if (unk_ev) {
2273 printk(TPACPI_NOTICE
2274 "unhandled HKEY event 0x%04x\n", hkey);
2275 }
2276
2277 /* Legacy events */
2278 if (!ignore_acpi_ev &&
2279 (send_acpi_ev || hotkey_report_mode < 2)) {
2280 acpi_bus_generate_proc_event(ibm->acpi->device,
2281 event, hkey);
2282 }
2283
2284 /* netlink events */
2285 if (!ignore_acpi_ev && send_acpi_ev) {
2286 acpi_bus_generate_netlink_event(
2287 ibm->acpi->device->pnp.device_class,
2288 ibm->acpi->device->dev.bus_id,
2289 event, hkey);
2290 }
2291 }
2292 }
2293
2294 static void hotkey_suspend(pm_message_t state)
2295 {
2296 /* Do these on suspend, we get the events on early resume! */
2297 hotkey_wakeup_reason = TP_ACPI_WAKEUP_NONE;
2298 hotkey_autosleep_ack = 0;
2299 }
2300
2301 static void hotkey_resume(void)
2302 {
2303 if (hotkey_mask_get())
2304 printk(TPACPI_ERR
2305 "error while trying to read hot key mask "
2306 "from firmware\n");
2307 tpacpi_input_send_radiosw();
2308 hotkey_radio_sw_notify_change();
2309 hotkey_tablet_mode_notify_change();
2310 hotkey_wakeup_reason_notify_change();
2311 hotkey_wakeup_hotunplug_complete_notify_change();
2312 hotkey_poll_setup_safe(0);
2313 }
2314
2315 /* procfs -------------------------------------------------------------- */
2316 static int hotkey_read(char *p)
2317 {
2318 int res, status;
2319 int len = 0;
2320
2321 if (!tp_features.hotkey) {
2322 len += sprintf(p + len, "status:\t\tnot supported\n");
2323 return len;
2324 }
2325
2326 if (mutex_lock_interruptible(&hotkey_mutex))
2327 return -ERESTARTSYS;
2328 res = hotkey_status_get(&status);
2329 if (!res)
2330 res = hotkey_mask_get();
2331 mutex_unlock(&hotkey_mutex);
2332 if (res)
2333 return res;
2334
2335 len += sprintf(p + len, "status:\t\t%s\n", enabled(status, 0));
2336 if (tp_features.hotkey_mask) {
2337 len += sprintf(p + len, "mask:\t\t0x%08x\n", hotkey_mask);
2338 len += sprintf(p + len,
2339 "commands:\tenable, disable, reset, <mask>\n");
2340 } else {
2341 len += sprintf(p + len, "mask:\t\tnot supported\n");
2342 len += sprintf(p + len, "commands:\tenable, disable, reset\n");
2343 }
2344
2345 return len;
2346 }
2347
2348 static int hotkey_write(char *buf)
2349 {
2350 int res, status;
2351 u32 mask;
2352 char *cmd;
2353
2354 if (!tp_features.hotkey)
2355 return -ENODEV;
2356
2357 if (mutex_lock_interruptible(&hotkey_mutex))
2358 return -ERESTARTSYS;
2359
2360 status = -1;
2361 mask = hotkey_mask;
2362
2363 res = 0;
2364 while ((cmd = next_cmd(&buf))) {
2365 if (strlencmp(cmd, "enable") == 0) {
2366 status = 1;
2367 } else if (strlencmp(cmd, "disable") == 0) {
2368 status = 0;
2369 } else if (strlencmp(cmd, "reset") == 0) {
2370 status = hotkey_orig_status;
2371 mask = hotkey_orig_mask;
2372 } else if (sscanf(cmd, "0x%x", &mask) == 1) {
2373 /* mask set */
2374 } else if (sscanf(cmd, "%x", &mask) == 1) {
2375 /* mask set */
2376 } else {
2377 res = -EINVAL;
2378 goto errexit;
2379 }
2380 }
2381 if (status != -1)
2382 res = hotkey_status_set(status);
2383
2384 if (!res && mask != hotkey_mask)
2385 res = hotkey_mask_set(mask);
2386
2387 errexit:
2388 mutex_unlock(&hotkey_mutex);
2389 return res;
2390 }
2391
2392 static const struct acpi_device_id ibm_htk_device_ids[] = {
2393 {TPACPI_ACPI_HKEY_HID, 0},
2394 {"", 0},
2395 };
2396
2397 static struct tp_acpi_drv_struct ibm_hotkey_acpidriver = {
2398 .hid = ibm_htk_device_ids,
2399 .notify = hotkey_notify,
2400 .handle = &hkey_handle,
2401 .type = ACPI_DEVICE_NOTIFY,
2402 };
2403
2404 static struct ibm_struct hotkey_driver_data = {
2405 .name = "hotkey",
2406 .read = hotkey_read,
2407 .write = hotkey_write,
2408 .exit = hotkey_exit,
2409 .resume = hotkey_resume,
2410 .suspend = hotkey_suspend,
2411 .acpi = &ibm_hotkey_acpidriver,
2412 };
2413
2414 /*************************************************************************
2415 * Bluetooth subdriver
2416 */
2417
2418 enum {
2419 /* ACPI GBDC/SBDC bits */
2420 TP_ACPI_BLUETOOTH_HWPRESENT = 0x01, /* Bluetooth hw available */
2421 TP_ACPI_BLUETOOTH_RADIOSSW = 0x02, /* Bluetooth radio enabled */
2422 TP_ACPI_BLUETOOTH_UNK = 0x04, /* unknown function */
2423 };
2424
2425 static int bluetooth_get_radiosw(void);
2426 static int bluetooth_set_radiosw(int radio_on);
2427
2428 /* sysfs bluetooth enable ---------------------------------------------- */
2429 static ssize_t bluetooth_enable_show(struct device *dev,
2430 struct device_attribute *attr,
2431 char *buf)
2432 {
2433 int status;
2434
2435 status = bluetooth_get_radiosw();
2436 if (status < 0)
2437 return status;
2438
2439 return snprintf(buf, PAGE_SIZE, "%d\n", status ? 1 : 0);
2440 }
2441
2442 static ssize_t bluetooth_enable_store(struct device *dev,
2443 struct device_attribute *attr,
2444 const char *buf, size_t count)
2445 {
2446 unsigned long t;
2447 int res;
2448
2449 if (parse_strtoul(buf, 1, &t))
2450 return -EINVAL;
2451
2452 res = bluetooth_set_radiosw(t);
2453
2454 return (res) ? res : count;
2455 }
2456
2457 static struct device_attribute dev_attr_bluetooth_enable =
2458 __ATTR(bluetooth_enable, S_IWUSR | S_IRUGO,
2459 bluetooth_enable_show, bluetooth_enable_store);
2460
2461 /* --------------------------------------------------------------------- */
2462
2463 static struct attribute *bluetooth_attributes[] = {
2464 &dev_attr_bluetooth_enable.attr,
2465 NULL
2466 };
2467
2468 static const struct attribute_group bluetooth_attr_group = {
2469 .attrs = bluetooth_attributes,
2470 };
2471
2472 static int __init bluetooth_init(struct ibm_init_struct *iibm)
2473 {
2474 int res;
2475 int status = 0;
2476
2477 vdbg_printk(TPACPI_DBG_INIT, "initializing bluetooth subdriver\n");
2478
2479 TPACPI_ACPIHANDLE_INIT(hkey);
2480
2481 /* bluetooth not supported on 570, 600e/x, 770e, 770x, A21e, A2xm/p,
2482 G4x, R30, R31, R40e, R50e, T20-22, X20-21 */
2483 tp_features.bluetooth = hkey_handle &&
2484 acpi_evalf(hkey_handle, &status, "GBDC", "qd");
2485
2486 vdbg_printk(TPACPI_DBG_INIT, "bluetooth is %s, status 0x%02x\n",
2487 str_supported(tp_features.bluetooth),
2488 status);
2489
2490 if (tp_features.bluetooth) {
2491 if (!(status & TP_ACPI_BLUETOOTH_HWPRESENT)) {
2492 /* no bluetooth hardware present in system */
2493 tp_features.bluetooth = 0;
2494 dbg_printk(TPACPI_DBG_INIT,
2495 "bluetooth hardware not installed\n");
2496 } else {
2497 res = sysfs_create_group(&tpacpi_pdev->dev.kobj,
2498 &bluetooth_attr_group);
2499 if (res)
2500 return res;
2501 }
2502 }
2503
2504 return (tp_features.bluetooth)? 0 : 1;
2505 }
2506
2507 static void bluetooth_exit(void)
2508 {
2509 sysfs_remove_group(&tpacpi_pdev->dev.kobj,
2510 &bluetooth_attr_group);
2511 }
2512
2513 static int bluetooth_get_radiosw(void)
2514 {
2515 int status;
2516
2517 if (!tp_features.bluetooth)
2518 return -ENODEV;
2519
2520 if (!acpi_evalf(hkey_handle, &status, "GBDC", "d"))
2521 return -EIO;
2522
2523 return ((status & TP_ACPI_BLUETOOTH_RADIOSSW) != 0);
2524 }
2525
2526 static int bluetooth_set_radiosw(int radio_on)
2527 {
2528 int status;
2529
2530 if (!tp_features.bluetooth)
2531 return -ENODEV;
2532
2533 if (!acpi_evalf(hkey_handle, &status, "GBDC", "d"))
2534 return -EIO;
2535 if (radio_on)
2536 status |= TP_ACPI_BLUETOOTH_RADIOSSW;
2537 else
2538 status &= ~TP_ACPI_BLUETOOTH_RADIOSSW;
2539 if (!acpi_evalf(hkey_handle, NULL, "SBDC", "vd", status))
2540 return -EIO;
2541
2542 return 0;
2543 }
2544
2545 /* procfs -------------------------------------------------------------- */
2546 static int bluetooth_read(char *p)
2547 {
2548 int len = 0;
2549 int status = bluetooth_get_radiosw();
2550
2551 if (!tp_features.bluetooth)
2552 len += sprintf(p + len, "status:\t\tnot supported\n");
2553 else {
2554 len += sprintf(p + len, "status:\t\t%s\n",
2555 (status)? "enabled" : "disabled");
2556 len += sprintf(p + len, "commands:\tenable, disable\n");
2557 }
2558
2559 return len;
2560 }
2561
2562 static int bluetooth_write(char *buf)
2563 {
2564 char *cmd;
2565
2566 if (!tp_features.bluetooth)
2567 return -ENODEV;
2568
2569 while ((cmd = next_cmd(&buf))) {
2570 if (strlencmp(cmd, "enable") == 0) {
2571 bluetooth_set_radiosw(1);
2572 } else if (strlencmp(cmd, "disable") == 0) {
2573 bluetooth_set_radiosw(0);
2574 } else
2575 return -EINVAL;
2576 }
2577
2578 return 0;
2579 }
2580
2581 static struct ibm_struct bluetooth_driver_data = {
2582 .name = "bluetooth",
2583 .read = bluetooth_read,
2584 .write = bluetooth_write,
2585 .exit = bluetooth_exit,
2586 };
2587
2588 /*************************************************************************
2589 * Wan subdriver
2590 */
2591
2592 enum {
2593 /* ACPI GWAN/SWAN bits */
2594 TP_ACPI_WANCARD_HWPRESENT = 0x01, /* Wan hw available */
2595 TP_ACPI_WANCARD_RADIOSSW = 0x02, /* Wan radio enabled */
2596 TP_ACPI_WANCARD_UNK = 0x04, /* unknown function */
2597 };
2598
2599 static int wan_get_radiosw(void);
2600 static int wan_set_radiosw(int radio_on);
2601
2602 /* sysfs wan enable ---------------------------------------------------- */
2603 static ssize_t wan_enable_show(struct device *dev,
2604 struct device_attribute *attr,
2605 char *buf)
2606 {
2607 int status;
2608
2609 status = wan_get_radiosw();
2610 if (status < 0)
2611 return status;
2612
2613 return snprintf(buf, PAGE_SIZE, "%d\n", status ? 1 : 0);
2614 }
2615
2616 static ssize_t wan_enable_store(struct device *dev,
2617 struct device_attribute *attr,
2618 const char *buf, size_t count)
2619 {
2620 unsigned long t;
2621 int res;
2622
2623 if (parse_strtoul(buf, 1, &t))
2624 return -EINVAL;
2625
2626 res = wan_set_radiosw(t);
2627
2628 return (res) ? res : count;
2629 }
2630
2631 static struct device_attribute dev_attr_wan_enable =
2632 __ATTR(wwan_enable, S_IWUSR | S_IRUGO,
2633 wan_enable_show, wan_enable_store);
2634
2635 /* --------------------------------------------------------------------- */
2636
2637 static struct attribute *wan_attributes[] = {
2638 &dev_attr_wan_enable.attr,
2639 NULL
2640 };
2641
2642 static const struct attribute_group wan_attr_group = {
2643 .attrs = wan_attributes,
2644 };
2645
2646 static int __init wan_init(struct ibm_init_struct *iibm)
2647 {
2648 int res;
2649 int status = 0;
2650
2651 vdbg_printk(TPACPI_DBG_INIT, "initializing wan subdriver\n");
2652
2653 TPACPI_ACPIHANDLE_INIT(hkey);
2654
2655 tp_features.wan = hkey_handle &&
2656 acpi_evalf(hkey_handle, &status, "GWAN", "qd");
2657
2658 vdbg_printk(TPACPI_DBG_INIT, "wan is %s, status 0x%02x\n",
2659 str_supported(tp_features.wan),
2660 status);
2661
2662 if (tp_features.wan) {
2663 if (!(status & TP_ACPI_WANCARD_HWPRESENT)) {
2664 /* no wan hardware present in system */
2665 tp_features.wan = 0;
2666 dbg_printk(TPACPI_DBG_INIT,
2667 "wan hardware not installed\n");
2668 } else {
2669 res = sysfs_create_group(&tpacpi_pdev->dev.kobj,
2670 &wan_attr_group);
2671 if (res)
2672 return res;
2673 }
2674 }
2675
2676 return (tp_features.wan)? 0 : 1;
2677 }
2678
2679 static void wan_exit(void)
2680 {
2681 sysfs_remove_group(&tpacpi_pdev->dev.kobj,
2682 &wan_attr_group);
2683 }
2684
2685 static int wan_get_radiosw(void)
2686 {
2687 int status;
2688
2689 if (!tp_features.wan)
2690 return -ENODEV;
2691
2692 if (!acpi_evalf(hkey_handle, &status, "GWAN", "d"))
2693 return -EIO;
2694
2695 return ((status & TP_ACPI_WANCARD_RADIOSSW) != 0);
2696 }
2697
2698 static int wan_set_radiosw(int radio_on)
2699 {
2700 int status;
2701
2702 if (!tp_features.wan)
2703 return -ENODEV;
2704
2705 if (!acpi_evalf(hkey_handle, &status, "GWAN", "d"))
2706 return -EIO;
2707 if (radio_on)
2708 status |= TP_ACPI_WANCARD_RADIOSSW;
2709 else
2710 status &= ~TP_ACPI_WANCARD_RADIOSSW;
2711 if (!acpi_evalf(hkey_handle, NULL, "SWAN", "vd", status))
2712 return -EIO;
2713
2714 return 0;
2715 }
2716
2717 /* procfs -------------------------------------------------------------- */
2718 static int wan_read(char *p)
2719 {
2720 int len = 0;
2721 int status = wan_get_radiosw();
2722
2723 if (!tp_features.wan)
2724 len += sprintf(p + len, "status:\t\tnot supported\n");
2725 else {
2726 len += sprintf(p + len, "status:\t\t%s\n",
2727 (status)? "enabled" : "disabled");
2728 len += sprintf(p + len, "commands:\tenable, disable\n");
2729 }
2730
2731 return len;
2732 }
2733
2734 static int wan_write(char *buf)
2735 {
2736 char *cmd;
2737
2738 if (!tp_features.wan)
2739 return -ENODEV;
2740
2741 while ((cmd = next_cmd(&buf))) {
2742 if (strlencmp(cmd, "enable") == 0) {
2743 wan_set_radiosw(1);
2744 } else if (strlencmp(cmd, "disable") == 0) {
2745 wan_set_radiosw(0);
2746 } else
2747 return -EINVAL;
2748 }
2749
2750 return 0;
2751 }
2752
2753 static struct ibm_struct wan_driver_data = {
2754 .name = "wan",
2755 .read = wan_read,
2756 .write = wan_write,
2757 .exit = wan_exit,
2758 .flags.experimental = 1,
2759 };
2760
2761 /*************************************************************************
2762 * Video subdriver
2763 */
2764
2765 #ifdef CONFIG_THINKPAD_ACPI_VIDEO
2766
2767 enum video_access_mode {
2768 TPACPI_VIDEO_NONE = 0,
2769 TPACPI_VIDEO_570, /* 570 */
2770 TPACPI_VIDEO_770, /* 600e/x, 770e, 770x */
2771 TPACPI_VIDEO_NEW, /* all others */
2772 };
2773
2774 enum { /* video status flags, based on VIDEO_570 */
2775 TP_ACPI_VIDEO_S_LCD = 0x01, /* LCD output enabled */
2776 TP_ACPI_VIDEO_S_CRT = 0x02, /* CRT output enabled */
2777 TP_ACPI_VIDEO_S_DVI = 0x08, /* DVI output enabled */
2778 };
2779
2780 enum { /* TPACPI_VIDEO_570 constants */
2781 TP_ACPI_VIDEO_570_PHSCMD = 0x87, /* unknown magic constant :( */
2782 TP_ACPI_VIDEO_570_PHSMASK = 0x03, /* PHS bits that map to
2783 * video_status_flags */
2784 TP_ACPI_VIDEO_570_PHS2CMD = 0x8b, /* unknown magic constant :( */
2785 TP_ACPI_VIDEO_570_PHS2SET = 0x80, /* unknown magic constant :( */
2786 };
2787
2788 static enum video_access_mode video_supported;
2789 static int video_orig_autosw;
2790
2791 static int video_autosw_get(void);
2792 static int video_autosw_set(int enable);
2793
2794 TPACPI_HANDLE(vid2, root, "\\_SB.PCI0.AGPB.VID"); /* G41 */
2795
2796 static int __init video_init(struct ibm_init_struct *iibm)
2797 {
2798 int ivga;
2799
2800 vdbg_printk(TPACPI_DBG_INIT, "initializing video subdriver\n");
2801
2802 TPACPI_ACPIHANDLE_INIT(vid);
2803 TPACPI_ACPIHANDLE_INIT(vid2);
2804
2805 if (vid2_handle && acpi_evalf(NULL, &ivga, "\\IVGA", "d") && ivga)
2806 /* G41, assume IVGA doesn't change */
2807 vid_handle = vid2_handle;
2808
2809 if (!vid_handle)
2810 /* video switching not supported on R30, R31 */
2811 video_supported = TPACPI_VIDEO_NONE;
2812 else if (acpi_evalf(vid_handle, &video_orig_autosw, "SWIT", "qd"))
2813 /* 570 */
2814 video_supported = TPACPI_VIDEO_570;
2815 else if (acpi_evalf(vid_handle, &video_orig_autosw, "^VADL", "qd"))
2816 /* 600e/x, 770e, 770x */
2817 video_supported = TPACPI_VIDEO_770;
2818 else
2819 /* all others */
2820 video_supported = TPACPI_VIDEO_NEW;
2821
2822 vdbg_printk(TPACPI_DBG_INIT, "video is %s, mode %d\n",
2823 str_supported(video_supported != TPACPI_VIDEO_NONE),
2824 video_supported);
2825
2826 return (video_supported != TPACPI_VIDEO_NONE)? 0 : 1;
2827 }
2828
2829 static void video_exit(void)
2830 {
2831 dbg_printk(TPACPI_DBG_EXIT,
2832 "restoring original video autoswitch mode\n");
2833 if (video_autosw_set(video_orig_autosw))
2834 printk(TPACPI_ERR "error while trying to restore original "
2835 "video autoswitch mode\n");
2836 }
2837
2838 static int video_outputsw_get(void)
2839 {
2840 int status = 0;
2841 int i;
2842
2843 switch (video_supported) {
2844 case TPACPI_VIDEO_570:
2845 if (!acpi_evalf(NULL, &i, "\\_SB.PHS", "dd",
2846 TP_ACPI_VIDEO_570_PHSCMD))
2847 return -EIO;
2848 status = i & TP_ACPI_VIDEO_570_PHSMASK;
2849 break;
2850 case TPACPI_VIDEO_770:
2851 if (!acpi_evalf(NULL, &i, "\\VCDL", "d"))
2852 return -EIO;
2853 if (i)
2854 status |= TP_ACPI_VIDEO_S_LCD;
2855 if (!acpi_evalf(NULL, &i, "\\VCDC", "d"))
2856 return -EIO;
2857 if (i)
2858 status |= TP_ACPI_VIDEO_S_CRT;
2859 break;
2860 case TPACPI_VIDEO_NEW:
2861 if (!acpi_evalf(NULL, NULL, "\\VUPS", "vd", 1) ||
2862 !acpi_evalf(NULL, &i, "\\VCDC", "d"))
2863 return -EIO;
2864 if (i)
2865 status |= TP_ACPI_VIDEO_S_CRT;
2866
2867 if (!acpi_evalf(NULL, NULL, "\\VUPS", "vd", 0) ||
2868 !acpi_evalf(NULL, &i, "\\VCDL", "d"))
2869 return -EIO;
2870 if (i)
2871 status |= TP_ACPI_VIDEO_S_LCD;
2872 if (!acpi_evalf(NULL, &i, "\\VCDD", "d"))
2873 return -EIO;
2874 if (i)
2875 status |= TP_ACPI_VIDEO_S_DVI;
2876 break;
2877 default:
2878 return -ENOSYS;
2879 }
2880
2881 return status;
2882 }
2883
2884 static int video_outputsw_set(int status)
2885 {
2886 int autosw;
2887 int res = 0;
2888
2889 switch (video_supported) {
2890 case TPACPI_VIDEO_570:
2891 res = acpi_evalf(NULL, NULL,
2892 "\\_SB.PHS2", "vdd",
2893 TP_ACPI_VIDEO_570_PHS2CMD,
2894 status | TP_ACPI_VIDEO_570_PHS2SET);
2895 break;
2896 case TPACPI_VIDEO_770:
2897 autosw = video_autosw_get();
2898 if (autosw < 0)
2899 return autosw;
2900
2901 res = video_autosw_set(1);
2902 if (res)
2903 return res;
2904 res = acpi_evalf(vid_handle, NULL,
2905 "ASWT", "vdd", status * 0x100, 0);
2906 if (!autosw && video_autosw_set(autosw)) {
2907 printk(TPACPI_ERR
2908 "video auto-switch left enabled due to error\n");
2909 return -EIO;
2910 }
2911 break;
2912 case TPACPI_VIDEO_NEW:
2913 res = acpi_evalf(NULL, NULL, "\\VUPS", "vd", 0x80) &&
2914 acpi_evalf(NULL, NULL, "\\VSDS", "vdd", status, 1);
2915 break;
2916 default:
2917 return -ENOSYS;
2918 }
2919
2920 return (res)? 0 : -EIO;
2921 }
2922
2923 static int video_autosw_get(void)
2924 {
2925 int autosw = 0;
2926
2927 switch (video_supported) {
2928 case TPACPI_VIDEO_570:
2929 if (!acpi_evalf(vid_handle, &autosw, "SWIT", "d"))
2930 return -EIO;
2931 break;
2932 case TPACPI_VIDEO_770:
2933 case TPACPI_VIDEO_NEW:
2934 if (!acpi_evalf(vid_handle, &autosw, "^VDEE", "d"))
2935 return -EIO;
2936 break;
2937 default:
2938 return -ENOSYS;
2939 }
2940
2941 return autosw & 1;
2942 }
2943
2944 static int video_autosw_set(int enable)
2945 {
2946 if (!acpi_evalf(vid_handle, NULL, "_DOS", "vd", (enable)? 1 : 0))
2947 return -EIO;
2948 return 0;
2949 }
2950
2951 static int video_outputsw_cycle(void)
2952 {
2953 int autosw = video_autosw_get();
2954 int res;
2955
2956 if (autosw < 0)
2957 return autosw;
2958
2959 switch (video_supported) {
2960 case TPACPI_VIDEO_570:
2961 res = video_autosw_set(1);
2962 if (res)
2963 return res;
2964 res = acpi_evalf(ec_handle, NULL, "_Q16", "v");
2965 break;
2966 case TPACPI_VIDEO_770:
2967 case TPACPI_VIDEO_NEW:
2968 res = video_autosw_set(1);
2969 if (res)
2970 return res;
2971 res = acpi_evalf(vid_handle, NULL, "VSWT", "v");
2972 break;
2973 default:
2974 return -ENOSYS;
2975 }
2976 if (!autosw && video_autosw_set(autosw)) {
2977 printk(TPACPI_ERR
2978 "video auto-switch left enabled due to error\n");
2979 return -EIO;
2980 }
2981
2982 return (res)? 0 : -EIO;
2983 }
2984
2985 static int video_expand_toggle(void)
2986 {
2987 switch (video_supported) {
2988 case TPACPI_VIDEO_570:
2989 return acpi_evalf(ec_handle, NULL, "_Q17", "v")?
2990 0 : -EIO;
2991 case TPACPI_VIDEO_770:
2992 return acpi_evalf(vid_handle, NULL, "VEXP", "v")?
2993 0 : -EIO;
2994 case TPACPI_VIDEO_NEW:
2995 return acpi_evalf(NULL, NULL, "\\VEXP", "v")?
2996 0 : -EIO;
2997 default:
2998 return -ENOSYS;
2999 }
3000 /* not reached */
3001 }
3002
3003 static int video_read(char *p)
3004 {
3005 int status, autosw;
3006 int len = 0;
3007
3008 if (video_supported == TPACPI_VIDEO_NONE) {
3009 len += sprintf(p + len, "status:\t\tnot supported\n");
3010 return len;
3011 }
3012
3013 status = video_outputsw_get();
3014 if (status < 0)
3015 return status;
3016
3017 autosw = video_autosw_get();
3018 if (autosw < 0)
3019 return autosw;
3020
3021 len += sprintf(p + len, "status:\t\tsupported\n");
3022 len += sprintf(p + len, "lcd:\t\t%s\n", enabled(status, 0));
3023 len += sprintf(p + len, "crt:\t\t%s\n", enabled(status, 1));
3024 if (video_supported == TPACPI_VIDEO_NEW)
3025 len += sprintf(p + len, "dvi:\t\t%s\n", enabled(status, 3));
3026 len += sprintf(p + len, "auto:\t\t%s\n", enabled(autosw, 0));
3027 len += sprintf(p + len, "commands:\tlcd_enable, lcd_disable\n");
3028 len += sprintf(p + len, "commands:\tcrt_enable, crt_disable\n");
3029 if (video_supported == TPACPI_VIDEO_NEW)
3030 len += sprintf(p + len, "commands:\tdvi_enable, dvi_disable\n");
3031 len += sprintf(p + len, "commands:\tauto_enable, auto_disable\n");
3032 len += sprintf(p + len, "commands:\tvideo_switch, expand_toggle\n");
3033
3034 return len;
3035 }
3036
3037 static int video_write(char *buf)
3038 {
3039 char *cmd;
3040 int enable, disable, status;
3041 int res;
3042
3043 if (video_supported == TPACPI_VIDEO_NONE)
3044 return -ENODEV;
3045
3046 enable = 0;
3047 disable = 0;
3048
3049 while ((cmd = next_cmd(&buf))) {
3050 if (strlencmp(cmd, "lcd_enable") == 0) {
3051 enable |= TP_ACPI_VIDEO_S_LCD;
3052 } else if (strlencmp(cmd, "lcd_disable") == 0) {
3053 disable |= TP_ACPI_VIDEO_S_LCD;
3054 } else if (strlencmp(cmd, "crt_enable") == 0) {
3055 enable |= TP_ACPI_VIDEO_S_CRT;
3056 } else if (strlencmp(cmd, "crt_disable") == 0) {
3057 disable |= TP_ACPI_VIDEO_S_CRT;
3058 } else if (video_supported == TPACPI_VIDEO_NEW &&
3059 strlencmp(cmd, "dvi_enable") == 0) {
3060 enable |= TP_ACPI_VIDEO_S_DVI;
3061 } else if (video_supported == TPACPI_VIDEO_NEW &&
3062 strlencmp(cmd, "dvi_disable") == 0) {
3063 disable |= TP_ACPI_VIDEO_S_DVI;
3064 } else if (strlencmp(cmd, "auto_enable") == 0) {
3065 res = video_autosw_set(1);
3066 if (res)
3067 return res;
3068 } else if (strlencmp(cmd, "auto_disable") == 0) {
3069 res = video_autosw_set(0);
3070 if (res)
3071 return res;
3072 } else if (strlencmp(cmd, "video_switch") == 0) {
3073 res = video_outputsw_cycle();
3074 if (res)
3075 return res;
3076 } else if (strlencmp(cmd, "expand_toggle") == 0) {
3077 res = video_expand_toggle();
3078 if (res)
3079 return res;
3080 } else
3081 return -EINVAL;
3082 }
3083
3084 if (enable || disable) {
3085 status = video_outputsw_get();
3086 if (status < 0)
3087 return status;
3088 res = video_outputsw_set((status & ~disable) | enable);
3089 if (res)
3090 return res;
3091 }
3092
3093 return 0;
3094 }
3095
3096 static struct ibm_struct video_driver_data = {
3097 .name = "video",
3098 .read = video_read,
3099 .write = video_write,
3100 .exit = video_exit,
3101 };
3102
3103 #endif /* CONFIG_THINKPAD_ACPI_VIDEO */
3104
3105 /*************************************************************************
3106 * Light (thinklight) subdriver
3107 */
3108
3109 TPACPI_HANDLE(lght, root, "\\LGHT"); /* A21e, A2xm/p, T20-22, X20-21 */
3110 TPACPI_HANDLE(ledb, ec, "LEDB"); /* G4x */
3111
3112 static int __init light_init(struct ibm_init_struct *iibm)
3113 {
3114 vdbg_printk(TPACPI_DBG_INIT, "initializing light subdriver\n");
3115
3116 TPACPI_ACPIHANDLE_INIT(ledb);
3117 TPACPI_ACPIHANDLE_INIT(lght);
3118 TPACPI_ACPIHANDLE_INIT(cmos);
3119
3120 /* light not supported on 570, 600e/x, 770e, 770x, G4x, R30, R31 */
3121 tp_features.light = (cmos_handle || lght_handle) && !ledb_handle;
3122
3123 if (tp_features.light)
3124 /* light status not supported on
3125 570, 600e/x, 770e, 770x, G4x, R30, R31, R32, X20 */
3126 tp_features.light_status =
3127 acpi_evalf(ec_handle, NULL, "KBLT", "qv");
3128
3129 vdbg_printk(TPACPI_DBG_INIT, "light is %s\n",
3130 str_supported(tp_features.light));
3131
3132 return (tp_features.light)? 0 : 1;
3133 }
3134
3135 static int light_read(char *p)
3136 {
3137 int len = 0;
3138 int status = 0;
3139
3140 if (!tp_features.light) {
3141 len += sprintf(p + len, "status:\t\tnot supported\n");
3142 } else if (!tp_features.light_status) {
3143 len += sprintf(p + len, "status:\t\tunknown\n");
3144 len += sprintf(p + len, "commands:\ton, off\n");
3145 } else {
3146 if (!acpi_evalf(ec_handle, &status, "KBLT", "d"))
3147 return -EIO;
3148 len += sprintf(p + len, "status:\t\t%s\n", onoff(status, 0));
3149 len += sprintf(p + len, "commands:\ton, off\n");
3150 }
3151
3152 return len;
3153 }
3154
3155 static int light_write(char *buf)
3156 {
3157 int cmos_cmd, lght_cmd;
3158 char *cmd;
3159 int success;
3160
3161 if (!tp_features.light)
3162 return -ENODEV;
3163
3164 while ((cmd = next_cmd(&buf))) {
3165 if (strlencmp(cmd, "on") == 0) {
3166 cmos_cmd = 0x0c;
3167 lght_cmd = 1;
3168 } else if (strlencmp(cmd, "off") == 0) {
3169 cmos_cmd = 0x0d;
3170 lght_cmd = 0;
3171 } else
3172 return -EINVAL;
3173
3174 success = cmos_handle ?
3175 acpi_evalf(cmos_handle, NULL, NULL, "vd", cmos_cmd) :
3176 acpi_evalf(lght_handle, NULL, NULL, "vd", lght_cmd);
3177 if (!success)
3178 return -EIO;
3179 }
3180
3181 return 0;
3182 }
3183
3184 static struct ibm_struct light_driver_data = {
3185 .name = "light",
3186 .read = light_read,
3187 .write = light_write,
3188 };
3189
3190 /*************************************************************************
3191 * Dock subdriver
3192 */
3193
3194 #ifdef CONFIG_THINKPAD_ACPI_DOCK
3195
3196 static void dock_notify(struct ibm_struct *ibm, u32 event);
3197 static int dock_read(char *p);
3198 static int dock_write(char *buf);
3199
3200 TPACPI_HANDLE(dock, root, "\\_SB.GDCK", /* X30, X31, X40 */
3201 "\\_SB.PCI0.DOCK", /* 600e/x,770e,770x,A2xm/p,T20-22,X20-21 */
3202 "\\_SB.PCI0.PCI1.DOCK", /* all others */
3203 "\\_SB.PCI.ISA.SLCE", /* 570 */
3204 ); /* A21e,G4x,R30,R31,R32,R40,R40e,R50e */
3205
3206 /* don't list other alternatives as we install a notify handler on the 570 */
3207 TPACPI_HANDLE(pci, root, "\\_SB.PCI"); /* 570 */
3208
3209 static const struct acpi_device_id ibm_pci_device_ids[] = {
3210 {PCI_ROOT_HID_STRING, 0},
3211 {"", 0},
3212 };
3213
3214 static struct tp_acpi_drv_struct ibm_dock_acpidriver[2] = {
3215 {
3216 .notify = dock_notify,
3217 .handle = &dock_handle,
3218 .type = ACPI_SYSTEM_NOTIFY,
3219 },
3220 {
3221 /* THIS ONE MUST NEVER BE USED FOR DRIVER AUTOLOADING.
3222 * We just use it to get notifications of dock hotplug
3223 * in very old thinkpads */
3224 .hid = ibm_pci_device_ids,
3225 .notify = dock_notify,
3226 .handle = &pci_handle,
3227 .type = ACPI_SYSTEM_NOTIFY,
3228 },
3229 };
3230
3231 static struct ibm_struct dock_driver_data[2] = {
3232 {
3233 .name = "dock",
3234 .read = dock_read,
3235 .write = dock_write,
3236 .acpi = &ibm_dock_acpidriver[0],
3237 },
3238 {
3239 .name = "dock",
3240 .acpi = &ibm_dock_acpidriver[1],
3241 },
3242 };
3243
3244 #define dock_docked() (_sta(dock_handle) & 1)
3245
3246 static int __init dock_init(struct ibm_init_struct *iibm)
3247 {
3248 vdbg_printk(TPACPI_DBG_INIT, "initializing dock subdriver\n");
3249
3250 TPACPI_ACPIHANDLE_INIT(dock);
3251
3252 vdbg_printk(TPACPI_DBG_INIT, "dock is %s\n",
3253 str_supported(dock_handle != NULL));
3254
3255 return (dock_handle)? 0 : 1;
3256 }
3257
3258 static int __init dock_init2(struct ibm_init_struct *iibm)
3259 {
3260 int dock2_needed;
3261
3262 vdbg_printk(TPACPI_DBG_INIT, "initializing dock subdriver part 2\n");
3263
3264 if (dock_driver_data[0].flags.acpi_driver_registered &&
3265 dock_driver_data[0].flags.acpi_notify_installed) {
3266 TPACPI_ACPIHANDLE_INIT(pci);
3267 dock2_needed = (pci_handle != NULL);
3268 vdbg_printk(TPACPI_DBG_INIT,
3269 "dock PCI handler for the TP 570 is %s\n",
3270 str_supported(dock2_needed));
3271 } else {
3272 vdbg_printk(TPACPI_DBG_INIT,
3273 "dock subdriver part 2 not required\n");
3274 dock2_needed = 0;
3275 }
3276
3277 return (dock2_needed)? 0 : 1;
3278 }
3279
3280 static void dock_notify(struct ibm_struct *ibm, u32 event)
3281 {
3282 int docked = dock_docked();
3283 int pci = ibm->acpi->hid && ibm->acpi->device &&
3284 acpi_match_device_ids(ibm->acpi->device, ibm_pci_device_ids);
3285 int data;
3286
3287 if (event == 1 && !pci) /* 570 */
3288 data = 1; /* button */
3289 else if (event == 1 && pci) /* 570 */
3290 data = 3; /* dock */
3291 else if (event == 3 && docked)
3292 data = 1; /* button */
3293 else if (event == 3 && !docked)
3294 data = 2; /* undock */
3295 else if (event == 0 && docked)
3296 data = 3; /* dock */
3297 else {
3298 printk(TPACPI_ERR "unknown dock event %d, status %d\n",
3299 event, _sta(dock_handle));
3300 data = 0; /* unknown */
3301 }
3302 acpi_bus_generate_proc_event(ibm->acpi->device, event, data);
3303 acpi_bus_generate_netlink_event(ibm->acpi->device->pnp.device_class,
3304 ibm->acpi->device->dev.bus_id,
3305 event, data);
3306 }
3307
3308 static int dock_read(char *p)
3309 {
3310 int len = 0;
3311 int docked = dock_docked();
3312
3313 if (!dock_handle)
3314 len += sprintf(p + len, "status:\t\tnot supported\n");
3315 else if (!docked)
3316 len += sprintf(p + len, "status:\t\tundocked\n");
3317 else {
3318 len += sprintf(p + len, "status:\t\tdocked\n");
3319 len += sprintf(p + len, "commands:\tdock, undock\n");
3320 }
3321
3322 return len;
3323 }
3324
3325 static int dock_write(char *buf)
3326 {
3327 char *cmd;
3328
3329 if (!dock_docked())
3330 return -ENODEV;
3331
3332 while ((cmd = next_cmd(&buf))) {
3333 if (strlencmp(cmd, "undock") == 0) {
3334 if (!acpi_evalf(dock_handle, NULL, "_DCK", "vd", 0) ||
3335 !acpi_evalf(dock_handle, NULL, "_EJ0", "vd", 1))
3336 return -EIO;
3337 } else if (strlencmp(cmd, "dock") == 0) {
3338 if (!acpi_evalf(dock_handle, NULL, "_DCK", "vd", 1))
3339 return -EIO;
3340 } else
3341 return -EINVAL;
3342 }
3343
3344 return 0;
3345 }
3346
3347 #endif /* CONFIG_THINKPAD_ACPI_DOCK */
3348
3349 /*************************************************************************
3350 * Bay subdriver
3351 */
3352
3353 #ifdef CONFIG_THINKPAD_ACPI_BAY
3354
3355 TPACPI_HANDLE(bay, root, "\\_SB.PCI.IDE.SECN.MAST", /* 570 */
3356 "\\_SB.PCI0.IDE0.IDES.IDSM", /* 600e/x, 770e, 770x */
3357 "\\_SB.PCI0.SATA.SCND.MSTR", /* T60, X60, Z60 */
3358 "\\_SB.PCI0.IDE0.SCND.MSTR", /* all others */
3359 ); /* A21e, R30, R31 */
3360 TPACPI_HANDLE(bay_ej, bay, "_EJ3", /* 600e/x, A2xm/p, A3x */
3361 "_EJ0", /* all others */
3362 ); /* 570,A21e,G4x,R30,R31,R32,R40e,R50e */
3363 TPACPI_HANDLE(bay2, root, "\\_SB.PCI0.IDE0.PRIM.SLAV", /* A3x, R32 */
3364 "\\_SB.PCI0.IDE0.IDEP.IDPS", /* 600e/x, 770e, 770x */
3365 ); /* all others */
3366 TPACPI_HANDLE(bay2_ej, bay2, "_EJ3", /* 600e/x, 770e, A3x */
3367 "_EJ0", /* 770x */
3368 ); /* all others */
3369
3370 static int __init bay_init(struct ibm_init_struct *iibm)
3371 {
3372 vdbg_printk(TPACPI_DBG_INIT, "initializing bay subdriver\n");
3373
3374 TPACPI_ACPIHANDLE_INIT(bay);
3375 if (bay_handle)
3376 TPACPI_ACPIHANDLE_INIT(bay_ej);
3377 TPACPI_ACPIHANDLE_INIT(bay2);
3378 if (bay2_handle)
3379 TPACPI_ACPIHANDLE_INIT(bay2_ej);
3380
3381 tp_features.bay_status = bay_handle &&
3382 acpi_evalf(bay_handle, NULL, "_STA", "qv");
3383 tp_features.bay_status2 = bay2_handle &&
3384 acpi_evalf(bay2_handle, NULL, "_STA", "qv");
3385
3386 tp_features.bay_eject = bay_handle && bay_ej_handle &&
3387 (strlencmp(bay_ej_path, "_EJ0") == 0 || experimental);
3388 tp_features.bay_eject2 = bay2_handle && bay2_ej_handle &&
3389 (strlencmp(bay2_ej_path, "_EJ0") == 0 || experimental);
3390
3391 vdbg_printk(TPACPI_DBG_INIT,
3392 "bay 1: status %s, eject %s; bay 2: status %s, eject %s\n",
3393 str_supported(tp_features.bay_status),
3394 str_supported(tp_features.bay_eject),
3395 str_supported(tp_features.bay_status2),
3396 str_supported(tp_features.bay_eject2));
3397
3398 return (tp_features.bay_status || tp_features.bay_eject ||
3399 tp_features.bay_status2 || tp_features.bay_eject2)? 0 : 1;
3400 }
3401
3402 static void bay_notify(struct ibm_struct *ibm, u32 event)
3403 {
3404 acpi_bus_generate_proc_event(ibm->acpi->device, event, 0);
3405 acpi_bus_generate_netlink_event(ibm->acpi->device->pnp.device_class,
3406 ibm->acpi->device->dev.bus_id,
3407 event, 0);
3408 }
3409
3410 #define bay_occupied(b) (_sta(b##_handle) & 1)
3411
3412 static int bay_read(char *p)
3413 {
3414 int len = 0;
3415 int occupied = bay_occupied(bay);
3416 int occupied2 = bay_occupied(bay2);
3417 int eject, eject2;
3418
3419 len += sprintf(p + len, "status:\t\t%s\n",
3420 tp_features.bay_status ?
3421 (occupied ? "occupied" : "unoccupied") :
3422 "not supported");
3423 if (tp_features.bay_status2)
3424 len += sprintf(p + len, "status2:\t%s\n", occupied2 ?
3425 "occupied" : "unoccupied");
3426
3427 eject = tp_features.bay_eject && occupied;
3428 eject2 = tp_features.bay_eject2 && occupied2;
3429
3430 if (eject && eject2)
3431 len += sprintf(p + len, "commands:\teject, eject2\n");
3432 else if (eject)
3433 len += sprintf(p + len, "commands:\teject\n");
3434 else if (eject2)
3435 len += sprintf(p + len, "commands:\teject2\n");
3436
3437 return len;
3438 }
3439
3440 static int bay_write(char *buf)
3441 {
3442 char *cmd;
3443
3444 if (!tp_features.bay_eject && !tp_features.bay_eject2)
3445 return -ENODEV;
3446
3447 while ((cmd = next_cmd(&buf))) {
3448 if (tp_features.bay_eject && strlencmp(cmd, "eject") == 0) {
3449 if (!acpi_evalf(bay_ej_handle, NULL, NULL, "vd", 1))
3450 return -EIO;
3451 } else if (tp_features.bay_eject2 &&
3452 strlencmp(cmd, "eject2") == 0) {
3453 if (!acpi_evalf(bay2_ej_handle, NULL, NULL, "vd", 1))
3454 return -EIO;
3455 } else
3456 return -EINVAL;
3457 }
3458
3459 return 0;
3460 }
3461
3462 static struct tp_acpi_drv_struct ibm_bay_acpidriver = {
3463 .notify = bay_notify,
3464 .handle = &bay_handle,
3465 .type = ACPI_SYSTEM_NOTIFY,
3466 };
3467
3468 static struct ibm_struct bay_driver_data = {
3469 .name = "bay",
3470 .read = bay_read,
3471 .write = bay_write,
3472 .acpi = &ibm_bay_acpidriver,
3473 };
3474
3475 #endif /* CONFIG_THINKPAD_ACPI_BAY */
3476
3477 /*************************************************************************
3478 * CMOS subdriver
3479 */
3480
3481 /* sysfs cmos_command -------------------------------------------------- */
3482 static ssize_t cmos_command_store(struct device *dev,
3483 struct device_attribute *attr,
3484 const char *buf, size_t count)
3485 {
3486 unsigned long cmos_cmd;
3487 int res;
3488
3489 if (parse_strtoul(buf, 21, &cmos_cmd))
3490 return -EINVAL;
3491
3492 res = issue_thinkpad_cmos_command(cmos_cmd);
3493 return (res)? res : count;
3494 }
3495
3496 static struct device_attribute dev_attr_cmos_command =
3497 __ATTR(cmos_command, S_IWUSR, NULL, cmos_command_store);
3498
3499 /* --------------------------------------------------------------------- */
3500
3501 static int __init cmos_init(struct ibm_init_struct *iibm)
3502 {
3503 int res;
3504
3505 vdbg_printk(TPACPI_DBG_INIT,
3506 "initializing cmos commands subdriver\n");
3507
3508 TPACPI_ACPIHANDLE_INIT(cmos);
3509
3510 vdbg_printk(TPACPI_DBG_INIT, "cmos commands are %s\n",
3511 str_supported(cmos_handle != NULL));
3512
3513 res = device_create_file(&tpacpi_pdev->dev, &dev_attr_cmos_command);
3514 if (res)
3515 return res;
3516
3517 return (cmos_handle)? 0 : 1;
3518 }
3519
3520 static void cmos_exit(void)
3521 {
3522 device_remove_file(&tpacpi_pdev->dev, &dev_attr_cmos_command);
3523 }
3524
3525 static int cmos_read(char *p)
3526 {
3527 int len = 0;
3528
3529 /* cmos not supported on 570, 600e/x, 770e, 770x, A21e, A2xm/p,
3530 R30, R31, T20-22, X20-21 */
3531 if (!cmos_handle)
3532 len += sprintf(p + len, "status:\t\tnot supported\n");
3533 else {
3534 len += sprintf(p + len, "status:\t\tsupported\n");
3535 len += sprintf(p + len, "commands:\t<cmd> (<cmd> is 0-21)\n");
3536 }
3537
3538 return len;
3539 }
3540
3541 static int cmos_write(char *buf)
3542 {
3543 char *cmd;
3544 int cmos_cmd, res;
3545
3546 while ((cmd = next_cmd(&buf))) {
3547 if (sscanf(cmd, "%u", &cmos_cmd) == 1 &&
3548 cmos_cmd >= 0 && cmos_cmd <= 21) {
3549 /* cmos_cmd set */
3550 } else
3551 return -EINVAL;
3552
3553 res = issue_thinkpad_cmos_command(cmos_cmd);
3554 if (res)
3555 return res;
3556 }
3557
3558 return 0;
3559 }
3560
3561 static struct ibm_struct cmos_driver_data = {
3562 .name = "cmos",
3563 .read = cmos_read,
3564 .write = cmos_write,
3565 .exit = cmos_exit,
3566 };
3567
3568 /*************************************************************************
3569 * LED subdriver
3570 */
3571
3572 enum led_access_mode {
3573 TPACPI_LED_NONE = 0,
3574 TPACPI_LED_570, /* 570 */
3575 TPACPI_LED_OLD, /* 600e/x, 770e, 770x, A21e, A2xm/p, T20-22, X20-21 */
3576 TPACPI_LED_NEW, /* all others */
3577 };
3578
3579 enum { /* For TPACPI_LED_OLD */
3580 TPACPI_LED_EC_HLCL = 0x0c, /* EC reg to get led to power on */
3581 TPACPI_LED_EC_HLBL = 0x0d, /* EC reg to blink a lit led */
3582 TPACPI_LED_EC_HLMS = 0x0e, /* EC reg to select led to command */
3583 };
3584
3585 static enum led_access_mode led_supported;
3586
3587 TPACPI_HANDLE(led, ec, "SLED", /* 570 */
3588 "SYSL", /* 600e/x, 770e, 770x, A21e, A2xm/p, */
3589 /* T20-22, X20-21 */
3590 "LED", /* all others */
3591 ); /* R30, R31 */
3592
3593 static int __init led_init(struct ibm_init_struct *iibm)
3594 {
3595 vdbg_printk(TPACPI_DBG_INIT, "initializing LED subdriver\n");
3596
3597 TPACPI_ACPIHANDLE_INIT(led);
3598
3599 if (!led_handle)
3600 /* led not supported on R30, R31 */
3601 led_supported = TPACPI_LED_NONE;
3602 else if (strlencmp(led_path, "SLED") == 0)
3603 /* 570 */
3604 led_supported = TPACPI_LED_570;
3605 else if (strlencmp(led_path, "SYSL") == 0)
3606 /* 600e/x, 770e, 770x, A21e, A2xm/p, T20-22, X20-21 */
3607 led_supported = TPACPI_LED_OLD;
3608 else
3609 /* all others */
3610 led_supported = TPACPI_LED_NEW;
3611
3612 vdbg_printk(TPACPI_DBG_INIT, "LED commands are %s, mode %d\n",
3613 str_supported(led_supported), led_supported);
3614
3615 return (led_supported != TPACPI_LED_NONE)? 0 : 1;
3616 }
3617
3618 #define led_status(s) ((s) == 0 ? "off" : ((s) == 1 ? "on" : "blinking"))
3619
3620 static int led_read(char *p)
3621 {
3622 int len = 0;
3623
3624 if (!led_supported) {
3625 len += sprintf(p + len, "status:\t\tnot supported\n");
3626 return len;
3627 }
3628 len += sprintf(p + len, "status:\t\tsupported\n");
3629
3630 if (led_supported == TPACPI_LED_570) {
3631 /* 570 */
3632 int i, status;
3633 for (i = 0; i < 8; i++) {
3634 if (!acpi_evalf(ec_handle,
3635 &status, "GLED", "dd", 1 << i))
3636 return -EIO;
3637 len += sprintf(p + len, "%d:\t\t%s\n",
3638 i, led_status(status));
3639 }
3640 }
3641
3642 len += sprintf(p + len, "commands:\t"
3643 "<led> on, <led> off, <led> blink (<led> is 0-7)\n");
3644
3645 return len;
3646 }
3647
3648 /* off, on, blink */
3649 static const int led_sled_arg1[] = { 0, 1, 3 };
3650 static const int led_exp_hlbl[] = { 0, 0, 1 }; /* led# * */
3651 static const int led_exp_hlcl[] = { 0, 1, 1 }; /* led# * */
3652 static const int led_led_arg1[] = { 0, 0x80, 0xc0 };
3653
3654 static int led_write(char *buf)
3655 {
3656 char *cmd;
3657 int led, ind, ret;
3658
3659 if (!led_supported)
3660 return -ENODEV;
3661
3662 while ((cmd = next_cmd(&buf))) {
3663 if (sscanf(cmd, "%d", &led) != 1 || led < 0 || led > 7)
3664 return -EINVAL;
3665
3666 if (strstr(cmd, "off")) {
3667 ind = 0;
3668 } else if (strstr(cmd, "on")) {
3669 ind = 1;
3670 } else if (strstr(cmd, "blink")) {
3671 ind = 2;
3672 } else
3673 return -EINVAL;
3674
3675 if (led_supported == TPACPI_LED_570) {
3676 /* 570 */
3677 led = 1 << led;
3678 if (!acpi_evalf(led_handle, NULL, NULL, "vdd",
3679 led, led_sled_arg1[ind]))
3680 return -EIO;
3681 } else if (led_supported == TPACPI_LED_OLD) {
3682 /* 600e/x, 770e, 770x, A21e, A2xm/p, T20-22, X20 */
3683 led = 1 << led;
3684 ret = ec_write(TPACPI_LED_EC_HLMS, led);
3685 if (ret >= 0)
3686 ret = ec_write(TPACPI_LED_EC_HLBL,
3687 led * led_exp_hlbl[ind]);
3688 if (ret >= 0)
3689 ret = ec_write(TPACPI_LED_EC_HLCL,
3690 led * led_exp_hlcl[ind]);
3691 if (ret < 0)
3692 return ret;
3693 } else {
3694 /* all others */
3695 if (!acpi_evalf(led_handle, NULL, NULL, "vdd",
3696 led, led_led_arg1[ind]))
3697 return -EIO;
3698 }
3699 }
3700
3701 return 0;
3702 }
3703
3704 static struct ibm_struct led_driver_data = {
3705 .name = "led",
3706 .read = led_read,
3707 .write = led_write,
3708 };
3709
3710 /*************************************************************************
3711 * Beep subdriver
3712 */
3713
3714 TPACPI_HANDLE(beep, ec, "BEEP"); /* all except R30, R31 */
3715
3716 static int __init beep_init(struct ibm_init_struct *iibm)
3717 {
3718 vdbg_printk(TPACPI_DBG_INIT, "initializing beep subdriver\n");
3719
3720 TPACPI_ACPIHANDLE_INIT(beep);
3721
3722 vdbg_printk(TPACPI_DBG_INIT, "beep is %s\n",
3723 str_supported(beep_handle != NULL));
3724
3725 return (beep_handle)? 0 : 1;
3726 }
3727
3728 static int beep_read(char *p)
3729 {
3730 int len = 0;
3731
3732 if (!beep_handle)
3733 len += sprintf(p + len, "status:\t\tnot supported\n");
3734 else {
3735 len += sprintf(p + len, "status:\t\tsupported\n");
3736 len += sprintf(p + len, "commands:\t<cmd> (<cmd> is 0-17)\n");
3737 }
3738
3739 return len;
3740 }
3741
3742 static int beep_write(char *buf)
3743 {
3744 char *cmd;
3745 int beep_cmd;
3746
3747 if (!beep_handle)
3748 return -ENODEV;
3749
3750 while ((cmd = next_cmd(&buf))) {
3751 if (sscanf(cmd, "%u", &beep_cmd) == 1 &&
3752 beep_cmd >= 0 && beep_cmd <= 17) {
3753 /* beep_cmd set */
3754 } else
3755 return -EINVAL;
3756 if (!acpi_evalf(beep_handle, NULL, NULL, "vdd", beep_cmd, 0))
3757 return -EIO;
3758 }
3759
3760 return 0;
3761 }
3762
3763 static struct ibm_struct beep_driver_data = {
3764 .name = "beep",
3765 .read = beep_read,
3766 .write = beep_write,
3767 };
3768
3769 /*************************************************************************
3770 * Thermal subdriver
3771 */
3772
3773 enum thermal_access_mode {
3774 TPACPI_THERMAL_NONE = 0, /* No thermal support */
3775 TPACPI_THERMAL_ACPI_TMP07, /* Use ACPI TMP0-7 */
3776 TPACPI_THERMAL_ACPI_UPDT, /* Use ACPI TMP0-7 with UPDT */
3777 TPACPI_THERMAL_TPEC_8, /* Use ACPI EC regs, 8 sensors */
3778 TPACPI_THERMAL_TPEC_16, /* Use ACPI EC regs, 16 sensors */
3779 };
3780
3781 enum { /* TPACPI_THERMAL_TPEC_* */
3782 TP_EC_THERMAL_TMP0 = 0x78, /* ACPI EC regs TMP 0..7 */
3783 TP_EC_THERMAL_TMP8 = 0xC0, /* ACPI EC regs TMP 8..15 */
3784 TP_EC_THERMAL_TMP_NA = -128, /* ACPI EC sensor not available */
3785 };
3786
3787 #define TPACPI_MAX_THERMAL_SENSORS 16 /* Max thermal sensors supported */
3788 struct ibm_thermal_sensors_struct {
3789 s32 temp[TPACPI_MAX_THERMAL_SENSORS];
3790 };
3791
3792 static enum thermal_access_mode thermal_read_mode;
3793
3794 /* idx is zero-based */
3795 static int thermal_get_sensor(int idx, s32 *value)
3796 {
3797 int t;
3798 s8 tmp;
3799 char tmpi[5];
3800
3801 t = TP_EC_THERMAL_TMP0;
3802
3803 switch (thermal_read_mode) {
3804 #if TPACPI_MAX_THERMAL_SENSORS >= 16
3805 case TPACPI_THERMAL_TPEC_16:
3806 if (idx >= 8 && idx <= 15) {
3807 t = TP_EC_THERMAL_TMP8;
3808 idx -= 8;
3809 }
3810 /* fallthrough */
3811 #endif
3812 case TPACPI_THERMAL_TPEC_8:
3813 if (idx <= 7) {
3814 if (!acpi_ec_read(t + idx, &tmp))
3815 return -EIO;
3816 *value = tmp * 1000;
3817 return 0;
3818 }
3819 break;
3820
3821 case TPACPI_THERMAL_ACPI_UPDT:
3822 if (idx <= 7) {
3823 snprintf(tmpi, sizeof(tmpi), "TMP%c", '0' + idx);
3824 if (!acpi_evalf(ec_handle, NULL, "UPDT", "v"))
3825 return -EIO;
3826 if (!acpi_evalf(ec_handle, &t, tmpi, "d"))
3827 return -EIO;
3828 *value = (t - 2732) * 100;
3829 return 0;
3830 }
3831 break;
3832
3833 case TPACPI_THERMAL_ACPI_TMP07:
3834 if (idx <= 7) {
3835 snprintf(tmpi, sizeof(tmpi), "TMP%c", '0' + idx);
3836 if (!acpi_evalf(ec_handle, &t, tmpi, "d"))
3837 return -EIO;
3838 if (t > 127 || t < -127)
3839 t = TP_EC_THERMAL_TMP_NA;
3840 *value = t * 1000;
3841 return 0;
3842 }
3843 break;
3844
3845 case TPACPI_THERMAL_NONE:
3846 default:
3847 return -ENOSYS;
3848 }
3849
3850 return -EINVAL;
3851 }
3852
3853 static int thermal_get_sensors(struct ibm_thermal_sensors_struct *s)
3854 {
3855 int res, i;
3856 int n;
3857
3858 n = 8;
3859 i = 0;
3860
3861 if (!s)
3862 return -EINVAL;
3863
3864 if (thermal_read_mode == TPACPI_THERMAL_TPEC_16)
3865 n = 16;
3866
3867 for (i = 0 ; i < n; i++) {
3868 res = thermal_get_sensor(i, &s->temp[i]);
3869 if (res)
3870 return res;
3871 }
3872
3873 return n;
3874 }
3875
3876 /* sysfs temp##_input -------------------------------------------------- */
3877
3878 static ssize_t thermal_temp_input_show(struct device *dev,
3879 struct device_attribute *attr,
3880 char *buf)
3881 {
3882 struct sensor_device_attribute *sensor_attr =
3883 to_sensor_dev_attr(attr);
3884 int idx = sensor_attr->index;
3885 s32 value;
3886 int res;
3887
3888 res = thermal_get_sensor(idx, &value);
3889 if (res)
3890 return res;
3891 if (value == TP_EC_THERMAL_TMP_NA * 1000)
3892 return -ENXIO;
3893
3894 return snprintf(buf, PAGE_SIZE, "%d\n", value);
3895 }
3896
3897 #define THERMAL_SENSOR_ATTR_TEMP(_idxA, _idxB) \
3898 SENSOR_ATTR(temp##_idxA##_input, S_IRUGO, \
3899 thermal_temp_input_show, NULL, _idxB)
3900
3901 static struct sensor_device_attribute sensor_dev_attr_thermal_temp_input[] = {
3902 THERMAL_SENSOR_ATTR_TEMP(1, 0),
3903 THERMAL_SENSOR_ATTR_TEMP(2, 1),
3904 THERMAL_SENSOR_ATTR_TEMP(3, 2),
3905 THERMAL_SENSOR_ATTR_TEMP(4, 3),
3906 THERMAL_SENSOR_ATTR_TEMP(5, 4),
3907 THERMAL_SENSOR_ATTR_TEMP(6, 5),
3908 THERMAL_SENSOR_ATTR_TEMP(7, 6),
3909 THERMAL_SENSOR_ATTR_TEMP(8, 7),
3910 THERMAL_SENSOR_ATTR_TEMP(9, 8),
3911 THERMAL_SENSOR_ATTR_TEMP(10, 9),
3912 THERMAL_SENSOR_ATTR_TEMP(11, 10),
3913 THERMAL_SENSOR_ATTR_TEMP(12, 11),
3914 THERMAL_SENSOR_ATTR_TEMP(13, 12),
3915 THERMAL_SENSOR_ATTR_TEMP(14, 13),
3916 THERMAL_SENSOR_ATTR_TEMP(15, 14),
3917 THERMAL_SENSOR_ATTR_TEMP(16, 15),
3918 };
3919
3920 #define THERMAL_ATTRS(X) \
3921 &sensor_dev_attr_thermal_temp_input[X].dev_attr.attr
3922
3923 static struct attribute *thermal_temp_input_attr[] = {
3924 THERMAL_ATTRS(8),
3925 THERMAL_ATTRS(9),
3926 THERMAL_ATTRS(10),
3927 THERMAL_ATTRS(11),
3928 THERMAL_ATTRS(12),
3929 THERMAL_ATTRS(13),
3930 THERMAL_ATTRS(14),
3931 THERMAL_ATTRS(15),
3932 THERMAL_ATTRS(0),
3933 THERMAL_ATTRS(1),
3934 THERMAL_ATTRS(2),
3935 THERMAL_ATTRS(3),
3936 THERMAL_ATTRS(4),
3937 THERMAL_ATTRS(5),
3938 THERMAL_ATTRS(6),
3939 THERMAL_ATTRS(7),
3940 NULL
3941 };
3942
3943 static const struct attribute_group thermal_temp_input16_group = {
3944 .attrs = thermal_temp_input_attr
3945 };
3946
3947 static const struct attribute_group thermal_temp_input8_group = {
3948 .attrs = &thermal_temp_input_attr[8]
3949 };
3950
3951 #undef THERMAL_SENSOR_ATTR_TEMP
3952 #undef THERMAL_ATTRS
3953
3954 /* --------------------------------------------------------------------- */
3955
3956 static int __init thermal_init(struct ibm_init_struct *iibm)
3957 {
3958 u8 t, ta1, ta2;
3959 int i;
3960 int acpi_tmp7;
3961 int res;
3962
3963 vdbg_printk(TPACPI_DBG_INIT, "initializing thermal subdriver\n");
3964
3965 acpi_tmp7 = acpi_evalf(ec_handle, NULL, "TMP7", "qv");
3966
3967 if (thinkpad_id.ec_model) {
3968 /*
3969 * Direct EC access mode: sensors at registers
3970 * 0x78-0x7F, 0xC0-0xC7. Registers return 0x00 for
3971 * non-implemented, thermal sensors return 0x80 when
3972 * not available
3973 */
3974
3975 ta1 = ta2 = 0;
3976 for (i = 0; i < 8; i++) {
3977 if (acpi_ec_read(TP_EC_THERMAL_TMP0 + i, &t)) {
3978 ta1 |= t;
3979 } else {
3980 ta1 = 0;
3981 break;
3982 }
3983 if (acpi_ec_read(TP_EC_THERMAL_TMP8 + i, &t)) {
3984 ta2 |= t;
3985 } else {
3986 ta1 = 0;
3987 break;
3988 }
3989 }
3990 if (ta1 == 0) {
3991 /* This is sheer paranoia, but we handle it anyway */
3992 if (acpi_tmp7) {
3993 printk(TPACPI_ERR
3994 "ThinkPad ACPI EC access misbehaving, "
3995 "falling back to ACPI TMPx access "
3996 "mode\n");
3997 thermal_read_mode = TPACPI_THERMAL_ACPI_TMP07;
3998 } else {
3999 printk(TPACPI_ERR
4000 "ThinkPad ACPI EC access misbehaving, "
4001 "disabling thermal sensors access\n");
4002 thermal_read_mode = TPACPI_THERMAL_NONE;
4003 }
4004 } else {
4005 thermal_read_mode =
4006 (ta2 != 0) ?
4007 TPACPI_THERMAL_TPEC_16 : TPACPI_THERMAL_TPEC_8;
4008 }
4009 } else if (acpi_tmp7) {
4010 if (acpi_evalf(ec_handle, NULL, "UPDT", "qv")) {
4011 /* 600e/x, 770e, 770x */
4012 thermal_read_mode = TPACPI_THERMAL_ACPI_UPDT;
4013 } else {
4014 /* Standard ACPI TMPx access, max 8 sensors */
4015 thermal_read_mode = TPACPI_THERMAL_ACPI_TMP07;
4016 }
4017 } else {
4018 /* temperatures not supported on 570, G4x, R30, R31, R32 */
4019 thermal_read_mode = TPACPI_THERMAL_NONE;
4020 }
4021
4022 vdbg_printk(TPACPI_DBG_INIT, "thermal is %s, mode %d\n",
4023 str_supported(thermal_read_mode != TPACPI_THERMAL_NONE),
4024 thermal_read_mode);
4025
4026 switch (thermal_read_mode) {
4027 case TPACPI_THERMAL_TPEC_16:
4028 res = sysfs_create_group(&tpacpi_sensors_pdev->dev.kobj,
4029 &thermal_temp_input16_group);
4030 if (res)
4031 return res;
4032 break;
4033 case TPACPI_THERMAL_TPEC_8:
4034 case TPACPI_THERMAL_ACPI_TMP07:
4035 case TPACPI_THERMAL_ACPI_UPDT:
4036 res = sysfs_create_group(&tpacpi_sensors_pdev->dev.kobj,
4037 &thermal_temp_input8_group);
4038 if (res)
4039 return res;
4040 break;
4041 case TPACPI_THERMAL_NONE:
4042 default:
4043 return 1;
4044 }
4045
4046 return 0;
4047 }
4048
4049 static void thermal_exit(void)
4050 {
4051 switch (thermal_read_mode) {
4052 case TPACPI_THERMAL_TPEC_16:
4053 sysfs_remove_group(&tpacpi_sensors_pdev->dev.kobj,
4054 &thermal_temp_input16_group);
4055 break;
4056 case TPACPI_THERMAL_TPEC_8:
4057 case TPACPI_THERMAL_ACPI_TMP07:
4058 case TPACPI_THERMAL_ACPI_UPDT:
4059 sysfs_remove_group(&tpacpi_sensors_pdev->dev.kobj,
4060 &thermal_temp_input16_group);
4061 break;
4062 case TPACPI_THERMAL_NONE:
4063 default:
4064 break;
4065 }
4066 }
4067
4068 static int thermal_read(char *p)
4069 {
4070 int len = 0;
4071 int n, i;
4072 struct ibm_thermal_sensors_struct t;
4073
4074 n = thermal_get_sensors(&t);
4075 if (unlikely(n < 0))
4076 return n;
4077
4078 len += sprintf(p + len, "temperatures:\t");
4079
4080 if (n > 0) {
4081 for (i = 0; i < (n - 1); i++)
4082 len += sprintf(p + len, "%d ", t.temp[i] / 1000);
4083 len += sprintf(p + len, "%d\n", t.temp[i] / 1000);
4084 } else
4085 len += sprintf(p + len, "not supported\n");
4086
4087 return len;
4088 }
4089
4090 static struct ibm_struct thermal_driver_data = {
4091 .name = "thermal",
4092 .read = thermal_read,
4093 .exit = thermal_exit,
4094 };
4095
4096 /*************************************************************************
4097 * EC Dump subdriver
4098 */
4099
4100 static u8 ecdump_regs[256];
4101
4102 static int ecdump_read(char *p)
4103 {
4104 int len = 0;
4105 int i, j;
4106 u8 v;
4107
4108 len += sprintf(p + len, "EC "
4109 " +00 +01 +02 +03 +04 +05 +06 +07"
4110 " +08 +09 +0a +0b +0c +0d +0e +0f\n");
4111 for (i = 0; i < 256; i += 16) {
4112 len += sprintf(p + len, "EC 0x%02x:", i);
4113 for (j = 0; j < 16; j++) {
4114 if (!acpi_ec_read(i + j, &v))
4115 break;
4116 if (v != ecdump_regs[i + j])
4117 len += sprintf(p + len, " *%02x", v);
4118 else
4119 len += sprintf(p + len, " %02x", v);
4120 ecdump_regs[i + j] = v;
4121 }
4122 len += sprintf(p + len, "\n");
4123 if (j != 16)
4124 break;
4125 }
4126
4127 /* These are way too dangerous to advertise openly... */
4128 #if 0
4129 len += sprintf(p + len, "commands:\t0x<offset> 0x<value>"
4130 " (<offset> is 00-ff, <value> is 00-ff)\n");
4131 len += sprintf(p + len, "commands:\t0x<offset> <value> "
4132 " (<offset> is 00-ff, <value> is 0-255)\n");
4133 #endif
4134 return len;
4135 }
4136
4137 static int ecdump_write(char *buf)
4138 {
4139 char *cmd;
4140 int i, v;
4141
4142 while ((cmd = next_cmd(&buf))) {
4143 if (sscanf(cmd, "0x%x 0x%x", &i, &v) == 2) {
4144 /* i and v set */
4145 } else if (sscanf(cmd, "0x%x %u", &i, &v) == 2) {
4146 /* i and v set */
4147 } else
4148 return -EINVAL;
4149 if (i >= 0 && i < 256 && v >= 0 && v < 256) {
4150 if (!acpi_ec_write(i, v))
4151 return -EIO;
4152 } else
4153 return -EINVAL;
4154 }
4155
4156 return 0;
4157 }
4158
4159 static struct ibm_struct ecdump_driver_data = {
4160 .name = "ecdump",
4161 .read = ecdump_read,
4162 .write = ecdump_write,
4163 .flags.experimental = 1,
4164 };
4165
4166 /*************************************************************************
4167 * Backlight/brightness subdriver
4168 */
4169
4170 #define TPACPI_BACKLIGHT_DEV_NAME "thinkpad_screen"
4171
4172 static struct backlight_device *ibm_backlight_device;
4173 static int brightness_offset = 0x31;
4174 static int brightness_mode;
4175 static unsigned int brightness_enable = 2; /* 2 = auto, 0 = no, 1 = yes */
4176
4177 static struct mutex brightness_mutex;
4178
4179 /*
4180 * ThinkPads can read brightness from two places: EC 0x31, or
4181 * CMOS NVRAM byte 0x5E, bits 0-3.
4182 */
4183 static int brightness_get(struct backlight_device *bd)
4184 {
4185 u8 lec = 0, lcmos = 0, level = 0;
4186
4187 if (brightness_mode & 1) {
4188 if (!acpi_ec_read(brightness_offset, &lec))
4189 return -EIO;
4190 lec &= (tp_features.bright_16levels)? 0x0f : 0x07;
4191 level = lec;
4192 };
4193 if (brightness_mode & 2) {
4194 lcmos = (nvram_read_byte(TP_NVRAM_ADDR_BRIGHTNESS)
4195 & TP_NVRAM_MASK_LEVEL_BRIGHTNESS)
4196 >> TP_NVRAM_POS_LEVEL_BRIGHTNESS;
4197 lcmos &= (tp_features.bright_16levels)? 0x0f : 0x07;
4198 level = lcmos;
4199 }
4200
4201 if (brightness_mode == 3 && lec != lcmos) {
4202 printk(TPACPI_ERR
4203 "CMOS NVRAM (%u) and EC (%u) do not agree "
4204 "on display brightness level\n",
4205 (unsigned int) lcmos,
4206 (unsigned int) lec);
4207 return -EIO;
4208 }
4209
4210 return level;
4211 }
4212
4213 /* May return EINTR which can always be mapped to ERESTARTSYS */
4214 static int brightness_set(int value)
4215 {
4216 int cmos_cmd, inc, i, res;
4217 int current_value;
4218
4219 if (value > ((tp_features.bright_16levels)? 15 : 7))
4220 return -EINVAL;
4221
4222 res = mutex_lock_interruptible(&brightness_mutex);
4223 if (res < 0)
4224 return res;
4225
4226 current_value = brightness_get(NULL);
4227 if (current_value < 0) {
4228 res = current_value;
4229 goto errout;
4230 }
4231
4232 cmos_cmd = value > current_value ?
4233 TP_CMOS_BRIGHTNESS_UP :
4234 TP_CMOS_BRIGHTNESS_DOWN;
4235 inc = (value > current_value)? 1 : -1;
4236
4237 res = 0;
4238 for (i = current_value; i != value; i += inc) {
4239 if ((brightness_mode & 2) &&
4240 issue_thinkpad_cmos_command(cmos_cmd)) {
4241 res = -EIO;
4242 goto errout;
4243 }
4244 if ((brightness_mode & 1) &&
4245 !acpi_ec_write(brightness_offset, i + inc)) {
4246 res = -EIO;
4247 goto errout;;
4248 }
4249 }
4250
4251 errout:
4252 mutex_unlock(&brightness_mutex);
4253 return res;
4254 }
4255
4256 /* sysfs backlight class ----------------------------------------------- */
4257
4258 static int brightness_update_status(struct backlight_device *bd)
4259 {
4260 /* it is the backlight class's job (caller) to handle
4261 * EINTR and other errors properly */
4262 return brightness_set(
4263 (bd->props.fb_blank == FB_BLANK_UNBLANK &&
4264 bd->props.power == FB_BLANK_UNBLANK) ?
4265 bd->props.brightness : 0);
4266 }
4267
4268 static struct backlight_ops ibm_backlight_data = {
4269 .get_brightness = brightness_get,
4270 .update_status = brightness_update_status,
4271 };
4272
4273 /* --------------------------------------------------------------------- */
4274
4275 static int __init tpacpi_query_bcll_levels(acpi_handle handle)
4276 {
4277 struct acpi_buffer buffer = { ACPI_ALLOCATE_BUFFER, NULL };
4278 union acpi_object *obj;
4279 int rc;
4280
4281 if (ACPI_SUCCESS(acpi_evaluate_object(handle, NULL, NULL, &buffer))) {
4282 obj = (union acpi_object *)buffer.pointer;
4283 if (!obj || (obj->type != ACPI_TYPE_PACKAGE)) {
4284 printk(TPACPI_ERR "Unknown BCLL data, "
4285 "please report this to %s\n", TPACPI_MAIL);
4286 rc = 0;
4287 } else {
4288 rc = obj->package.count;
4289 }
4290 } else {
4291 return 0;
4292 }
4293
4294 kfree(buffer.pointer);
4295 return rc;
4296 }
4297
4298 static acpi_status __init brightness_find_bcll(acpi_handle handle, u32 lvl,
4299 void *context, void **rv)
4300 {
4301 char name[ACPI_PATH_SEGMENT_LENGTH];
4302 struct acpi_buffer buffer = { sizeof(name), &name };
4303
4304 if (ACPI_SUCCESS(acpi_get_name(handle, ACPI_SINGLE_NAME, &buffer)) &&
4305 !strncmp("BCLL", name, sizeof(name) - 1)) {
4306 if (tpacpi_query_bcll_levels(handle) == 16) {
4307 *rv = handle;
4308 return AE_CTRL_TERMINATE;
4309 } else {
4310 return AE_OK;
4311 }
4312 } else {
4313 return AE_OK;
4314 }
4315 }
4316
4317 static int __init brightness_check_levels(void)
4318 {
4319 int status;
4320 void *found_node = NULL;
4321
4322 if (!vid_handle) {
4323 TPACPI_ACPIHANDLE_INIT(vid);
4324 }
4325 if (!vid_handle)
4326 return 0;
4327
4328 /* Search for a BCLL package with 16 levels */
4329 status = acpi_walk_namespace(ACPI_TYPE_PACKAGE, vid_handle, 3,
4330 brightness_find_bcll, NULL,
4331 &found_node);
4332
4333 return (ACPI_SUCCESS(status) && found_node != NULL);
4334 }
4335
4336 static acpi_status __init brightness_find_bcl(acpi_handle handle, u32 lvl,
4337 void *context, void **rv)
4338 {
4339 char name[ACPI_PATH_SEGMENT_LENGTH];
4340 struct acpi_buffer buffer = { sizeof(name), &name };
4341
4342 if (ACPI_SUCCESS(acpi_get_name(handle, ACPI_SINGLE_NAME, &buffer)) &&
4343 !strncmp("_BCL", name, sizeof(name) - 1)) {
4344 *rv = handle;
4345 return AE_CTRL_TERMINATE;
4346 } else {
4347 return AE_OK;
4348 }
4349 }
4350
4351 static int __init brightness_check_std_acpi_support(void)
4352 {
4353 int status;
4354 void *found_node = NULL;
4355
4356 if (!vid_handle) {
4357 TPACPI_ACPIHANDLE_INIT(vid);
4358 }
4359 if (!vid_handle)
4360 return 0;
4361
4362 /* Search for a _BCL method, but don't execute it */
4363 status = acpi_walk_namespace(ACPI_TYPE_METHOD, vid_handle, 3,
4364 brightness_find_bcl, NULL, &found_node);
4365
4366 return (ACPI_SUCCESS(status) && found_node != NULL);
4367 }
4368
4369 static int __init brightness_init(struct ibm_init_struct *iibm)
4370 {
4371 int b;
4372
4373 vdbg_printk(TPACPI_DBG_INIT, "initializing brightness subdriver\n");
4374
4375 mutex_init(&brightness_mutex);
4376
4377 if (!brightness_enable) {
4378 dbg_printk(TPACPI_DBG_INIT,
4379 "brightness support disabled by "
4380 "module parameter\n");
4381 return 1;
4382 } else if (brightness_enable > 1) {
4383 if (brightness_check_std_acpi_support()) {
4384 printk(TPACPI_NOTICE
4385 "standard ACPI backlight interface "
4386 "available, not loading native one...\n");
4387 return 1;
4388 }
4389 }
4390
4391 if (!brightness_mode) {
4392 if (thinkpad_id.vendor == PCI_VENDOR_ID_LENOVO)
4393 brightness_mode = 2;
4394 else
4395 brightness_mode = 3;
4396
4397 dbg_printk(TPACPI_DBG_INIT, "selected brightness_mode=%d\n",
4398 brightness_mode);
4399 }
4400
4401 if (brightness_mode > 3)
4402 return -EINVAL;
4403
4404 tp_features.bright_16levels =
4405 thinkpad_id.vendor == PCI_VENDOR_ID_LENOVO &&
4406 brightness_check_levels();
4407
4408 b = brightness_get(NULL);
4409 if (b < 0)
4410 return 1;
4411
4412 if (tp_features.bright_16levels)
4413 printk(TPACPI_INFO
4414 "detected a 16-level brightness capable ThinkPad\n");
4415
4416 ibm_backlight_device = backlight_device_register(
4417 TPACPI_BACKLIGHT_DEV_NAME, NULL, NULL,
4418 &ibm_backlight_data);
4419 if (IS_ERR(ibm_backlight_device)) {
4420 printk(TPACPI_ERR "Could not register backlight device\n");
4421 return PTR_ERR(ibm_backlight_device);
4422 }
4423 vdbg_printk(TPACPI_DBG_INIT, "brightness is supported\n");
4424
4425 ibm_backlight_device->props.max_brightness =
4426 (tp_features.bright_16levels)? 15 : 7;
4427 ibm_backlight_device->props.brightness = b;
4428 backlight_update_status(ibm_backlight_device);
4429
4430 return 0;
4431 }
4432
4433 static void brightness_exit(void)
4434 {
4435 if (ibm_backlight_device) {
4436 vdbg_printk(TPACPI_DBG_EXIT,
4437 "calling backlight_device_unregister()\n");
4438 backlight_device_unregister(ibm_backlight_device);
4439 ibm_backlight_device = NULL;
4440 }
4441 }
4442
4443 static int brightness_read(char *p)
4444 {
4445 int len = 0;
4446 int level;
4447
4448 level = brightness_get(NULL);
4449 if (level < 0) {
4450 len += sprintf(p + len, "level:\t\tunreadable\n");
4451 } else {
4452 len += sprintf(p + len, "level:\t\t%d\n", level);
4453 len += sprintf(p + len, "commands:\tup, down\n");
4454 len += sprintf(p + len, "commands:\tlevel <level>"
4455 " (<level> is 0-%d)\n",
4456 (tp_features.bright_16levels) ? 15 : 7);
4457 }
4458
4459 return len;
4460 }
4461
4462 static int brightness_write(char *buf)
4463 {
4464 int level;
4465 int rc;
4466 char *cmd;
4467 int max_level = (tp_features.bright_16levels) ? 15 : 7;
4468
4469 level = brightness_get(NULL);
4470 if (level < 0)
4471 return level;
4472
4473 while ((cmd = next_cmd(&buf))) {
4474 if (strlencmp(cmd, "up") == 0) {
4475 if (level < max_level)
4476 level++;
4477 } else if (strlencmp(cmd, "down") == 0) {
4478 if (level > 0)
4479 level--;
4480 } else if (sscanf(cmd, "level %d", &level) == 1 &&
4481 level >= 0 && level <= max_level) {
4482 /* new level set */
4483 } else
4484 return -EINVAL;
4485 }
4486
4487 /*
4488 * Now we know what the final level should be, so we try to set it.
4489 * Doing it this way makes the syscall restartable in case of EINTR
4490 */
4491 rc = brightness_set(level);
4492 return (rc == -EINTR)? ERESTARTSYS : rc;
4493 }
4494
4495 static struct ibm_struct brightness_driver_data = {
4496 .name = "brightness",
4497 .read = brightness_read,
4498 .write = brightness_write,
4499 .exit = brightness_exit,
4500 };
4501
4502 /*************************************************************************
4503 * Volume subdriver
4504 */
4505
4506 static int volume_offset = 0x30;
4507
4508 static int volume_read(char *p)
4509 {
4510 int len = 0;
4511 u8 level;
4512
4513 if (!acpi_ec_read(volume_offset, &level)) {
4514 len += sprintf(p + len, "level:\t\tunreadable\n");
4515 } else {
4516 len += sprintf(p + len, "level:\t\t%d\n", level & 0xf);
4517 len += sprintf(p + len, "mute:\t\t%s\n", onoff(level, 6));
4518 len += sprintf(p + len, "commands:\tup, down, mute\n");
4519 len += sprintf(p + len, "commands:\tlevel <level>"
4520 " (<level> is 0-15)\n");
4521 }
4522
4523 return len;
4524 }
4525
4526 static int volume_write(char *buf)
4527 {
4528 int cmos_cmd, inc, i;
4529 u8 level, mute;
4530 int new_level, new_mute;
4531 char *cmd;
4532
4533 while ((cmd = next_cmd(&buf))) {
4534 if (!acpi_ec_read(volume_offset, &level))
4535 return -EIO;
4536 new_mute = mute = level & 0x40;
4537 new_level = level = level & 0xf;
4538
4539 if (strlencmp(cmd, "up") == 0) {
4540 if (mute)
4541 new_mute = 0;
4542 else
4543 new_level = level == 15 ? 15 : level + 1;
4544 } else if (strlencmp(cmd, "down") == 0) {
4545 if (mute)
4546 new_mute = 0;
4547 else
4548 new_level = level == 0 ? 0 : level - 1;
4549 } else if (sscanf(cmd, "level %d", &new_level) == 1 &&
4550 new_level >= 0 && new_level <= 15) {
4551 /* new_level set */
4552 } else if (strlencmp(cmd, "mute") == 0) {
4553 new_mute = 0x40;
4554 } else
4555 return -EINVAL;
4556
4557 if (new_level != level) {
4558 /* mute doesn't change */
4559
4560 cmos_cmd = (new_level > level) ?
4561 TP_CMOS_VOLUME_UP : TP_CMOS_VOLUME_DOWN;
4562 inc = new_level > level ? 1 : -1;
4563
4564 if (mute && (issue_thinkpad_cmos_command(cmos_cmd) ||
4565 !acpi_ec_write(volume_offset, level)))
4566 return -EIO;
4567
4568 for (i = level; i != new_level; i += inc)
4569 if (issue_thinkpad_cmos_command(cmos_cmd) ||
4570 !acpi_ec_write(volume_offset, i + inc))
4571 return -EIO;
4572
4573 if (mute &&
4574 (issue_thinkpad_cmos_command(TP_CMOS_VOLUME_MUTE) ||
4575 !acpi_ec_write(volume_offset, new_level + mute))) {
4576 return -EIO;
4577 }
4578 }
4579
4580 if (new_mute != mute) {
4581 /* level doesn't change */
4582
4583 cmos_cmd = (new_mute) ?
4584 TP_CMOS_VOLUME_MUTE : TP_CMOS_VOLUME_UP;
4585
4586 if (issue_thinkpad_cmos_command(cmos_cmd) ||
4587 !acpi_ec_write(volume_offset, level + new_mute))
4588 return -EIO;
4589 }
4590 }
4591
4592 return 0;
4593 }
4594
4595 static struct ibm_struct volume_driver_data = {
4596 .name = "volume",
4597 .read = volume_read,
4598 .write = volume_write,
4599 };
4600
4601 /*************************************************************************
4602 * Fan subdriver
4603 */
4604
4605 /*
4606 * FAN ACCESS MODES
4607 *
4608 * TPACPI_FAN_RD_ACPI_GFAN:
4609 * ACPI GFAN method: returns fan level
4610 *
4611 * see TPACPI_FAN_WR_ACPI_SFAN
4612 * EC 0x2f (HFSP) not available if GFAN exists
4613 *
4614 * TPACPI_FAN_WR_ACPI_SFAN:
4615 * ACPI SFAN method: sets fan level, 0 (stop) to 7 (max)
4616 *
4617 * EC 0x2f (HFSP) might be available *for reading*, but do not use
4618 * it for writing.
4619 *
4620 * TPACPI_FAN_WR_TPEC:
4621 * ThinkPad EC register 0x2f (HFSP): fan control loop mode
4622 * Supported on almost all ThinkPads
4623 *
4624 * Fan speed changes of any sort (including those caused by the
4625 * disengaged mode) are usually done slowly by the firmware as the
4626 * maximum ammount of fan duty cycle change per second seems to be
4627 * limited.
4628 *
4629 * Reading is not available if GFAN exists.
4630 * Writing is not available if SFAN exists.
4631 *
4632 * Bits
4633 * 7 automatic mode engaged;
4634 * (default operation mode of the ThinkPad)
4635 * fan level is ignored in this mode.
4636 * 6 full speed mode (takes precedence over bit 7);
4637 * not available on all thinkpads. May disable
4638 * the tachometer while the fan controller ramps up
4639 * the speed (which can take up to a few *minutes*).
4640 * Speeds up fan to 100% duty-cycle, which is far above
4641 * the standard RPM levels. It is not impossible that
4642 * it could cause hardware damage.
4643 * 5-3 unused in some models. Extra bits for fan level
4644 * in others, but still useless as all values above
4645 * 7 map to the same speed as level 7 in these models.
4646 * 2-0 fan level (0..7 usually)
4647 * 0x00 = stop
4648 * 0x07 = max (set when temperatures critical)
4649 * Some ThinkPads may have other levels, see
4650 * TPACPI_FAN_WR_ACPI_FANS (X31/X40/X41)
4651 *
4652 * FIRMWARE BUG: on some models, EC 0x2f might not be initialized at
4653 * boot. Apparently the EC does not intialize it, so unless ACPI DSDT
4654 * does so, its initial value is meaningless (0x07).
4655 *
4656 * For firmware bugs, refer to:
4657 * http://thinkwiki.org/wiki/Embedded_Controller_Firmware#Firmware_Issues
4658 *
4659 * ----
4660 *
4661 * ThinkPad EC register 0x84 (LSB), 0x85 (MSB):
4662 * Main fan tachometer reading (in RPM)
4663 *
4664 * This register is present on all ThinkPads with a new-style EC, and
4665 * it is known not to be present on the A21m/e, and T22, as there is
4666 * something else in offset 0x84 according to the ACPI DSDT. Other
4667 * ThinkPads from this same time period (and earlier) probably lack the
4668 * tachometer as well.
4669 *
4670 * Unfortunately a lot of ThinkPads with new-style ECs but whose firwmare
4671 * was never fixed by IBM to report the EC firmware version string
4672 * probably support the tachometer (like the early X models), so
4673 * detecting it is quite hard. We need more data to know for sure.
4674 *
4675 * FIRMWARE BUG: always read 0x84 first, otherwise incorrect readings
4676 * might result.
4677 *
4678 * FIRMWARE BUG: may go stale while the EC is switching to full speed
4679 * mode.
4680 *
4681 * For firmware bugs, refer to:
4682 * http://thinkwiki.org/wiki/Embedded_Controller_Firmware#Firmware_Issues
4683 *
4684 * TPACPI_FAN_WR_ACPI_FANS:
4685 * ThinkPad X31, X40, X41. Not available in the X60.
4686 *
4687 * FANS ACPI handle: takes three arguments: low speed, medium speed,
4688 * high speed. ACPI DSDT seems to map these three speeds to levels
4689 * as follows: STOP LOW LOW MED MED HIGH HIGH HIGH HIGH
4690 * (this map is stored on FAN0..FAN8 as "0,1,1,2,2,3,3,3,3")
4691 *
4692 * The speeds are stored on handles
4693 * (FANA:FAN9), (FANC:FANB), (FANE:FAND).
4694 *
4695 * There are three default speed sets, acessible as handles:
4696 * FS1L,FS1M,FS1H; FS2L,FS2M,FS2H; FS3L,FS3M,FS3H
4697 *
4698 * ACPI DSDT switches which set is in use depending on various
4699 * factors.
4700 *
4701 * TPACPI_FAN_WR_TPEC is also available and should be used to
4702 * command the fan. The X31/X40/X41 seems to have 8 fan levels,
4703 * but the ACPI tables just mention level 7.
4704 */
4705
4706 enum { /* Fan control constants */
4707 fan_status_offset = 0x2f, /* EC register 0x2f */
4708 fan_rpm_offset = 0x84, /* EC register 0x84: LSB, 0x85 MSB (RPM)
4709 * 0x84 must be read before 0x85 */
4710
4711 TP_EC_FAN_FULLSPEED = 0x40, /* EC fan mode: full speed */
4712 TP_EC_FAN_AUTO = 0x80, /* EC fan mode: auto fan control */
4713
4714 TPACPI_FAN_LAST_LEVEL = 0x100, /* Use cached last-seen fan level */
4715 };
4716
4717 enum fan_status_access_mode {
4718 TPACPI_FAN_NONE = 0, /* No fan status or control */
4719 TPACPI_FAN_RD_ACPI_GFAN, /* Use ACPI GFAN */
4720 TPACPI_FAN_RD_TPEC, /* Use ACPI EC regs 0x2f, 0x84-0x85 */
4721 };
4722
4723 enum fan_control_access_mode {
4724 TPACPI_FAN_WR_NONE = 0, /* No fan control */
4725 TPACPI_FAN_WR_ACPI_SFAN, /* Use ACPI SFAN */
4726 TPACPI_FAN_WR_TPEC, /* Use ACPI EC reg 0x2f */
4727 TPACPI_FAN_WR_ACPI_FANS, /* Use ACPI FANS and EC reg 0x2f */
4728 };
4729
4730 enum fan_control_commands {
4731 TPACPI_FAN_CMD_SPEED = 0x0001, /* speed command */
4732 TPACPI_FAN_CMD_LEVEL = 0x0002, /* level command */
4733 TPACPI_FAN_CMD_ENABLE = 0x0004, /* enable/disable cmd,
4734 * and also watchdog cmd */
4735 };
4736
4737 static int fan_control_allowed;
4738
4739 static enum fan_status_access_mode fan_status_access_mode;
4740 static enum fan_control_access_mode fan_control_access_mode;
4741 static enum fan_control_commands fan_control_commands;
4742
4743 static u8 fan_control_initial_status;
4744 static u8 fan_control_desired_level;
4745 static int fan_watchdog_maxinterval;
4746
4747 static struct mutex fan_mutex;
4748
4749 static void fan_watchdog_fire(struct work_struct *ignored);
4750 static DECLARE_DELAYED_WORK(fan_watchdog_task, fan_watchdog_fire);
4751
4752 TPACPI_HANDLE(fans, ec, "FANS"); /* X31, X40, X41 */
4753 TPACPI_HANDLE(gfan, ec, "GFAN", /* 570 */
4754 "\\FSPD", /* 600e/x, 770e, 770x */
4755 ); /* all others */
4756 TPACPI_HANDLE(sfan, ec, "SFAN", /* 570 */
4757 "JFNS", /* 770x-JL */
4758 ); /* all others */
4759
4760 /*
4761 * Call with fan_mutex held
4762 */
4763 static void fan_update_desired_level(u8 status)
4764 {
4765 if ((status &
4766 (TP_EC_FAN_AUTO | TP_EC_FAN_FULLSPEED)) == 0) {
4767 if (status > 7)
4768 fan_control_desired_level = 7;
4769 else
4770 fan_control_desired_level = status;
4771 }
4772 }
4773
4774 static int fan_get_status(u8 *status)
4775 {
4776 u8 s;
4777
4778 /* TODO:
4779 * Add TPACPI_FAN_RD_ACPI_FANS ? */
4780
4781 switch (fan_status_access_mode) {
4782 case TPACPI_FAN_RD_ACPI_GFAN:
4783 /* 570, 600e/x, 770e, 770x */
4784
4785 if (unlikely(!acpi_evalf(gfan_handle, &s, NULL, "d")))
4786 return -EIO;
4787
4788 if (likely(status))
4789 *status = s & 0x07;
4790
4791 break;
4792
4793 case TPACPI_FAN_RD_TPEC:
4794 /* all except 570, 600e/x, 770e, 770x */
4795 if (unlikely(!acpi_ec_read(fan_status_offset, &s)))
4796 return -EIO;
4797
4798 if (likely(status))
4799 *status = s;
4800
4801 break;
4802
4803 default:
4804 return -ENXIO;
4805 }
4806
4807 return 0;
4808 }
4809
4810 static int fan_get_status_safe(u8 *status)
4811 {
4812 int rc;
4813 u8 s;
4814
4815 if (mutex_lock_interruptible(&fan_mutex))
4816 return -ERESTARTSYS;
4817 rc = fan_get_status(&s);
4818 if (!rc)
4819 fan_update_desired_level(s);
4820 mutex_unlock(&fan_mutex);
4821
4822 if (status)
4823 *status = s;
4824
4825 return rc;
4826 }
4827
4828 static int fan_get_speed(unsigned int *speed)
4829 {
4830 u8 hi, lo;
4831
4832 switch (fan_status_access_mode) {
4833 case TPACPI_FAN_RD_TPEC:
4834 /* all except 570, 600e/x, 770e, 770x */
4835 if (unlikely(!acpi_ec_read(fan_rpm_offset, &lo) ||
4836 !acpi_ec_read(fan_rpm_offset + 1, &hi)))
4837 return -EIO;
4838
4839 if (likely(speed))
4840 *speed = (hi << 8) | lo;
4841
4842 break;
4843
4844 default:
4845 return -ENXIO;
4846 }
4847
4848 return 0;
4849 }
4850
4851 static int fan_set_level(int level)
4852 {
4853 if (!fan_control_allowed)
4854 return -EPERM;
4855
4856 switch (fan_control_access_mode) {
4857 case TPACPI_FAN_WR_ACPI_SFAN:
4858 if (level >= 0 && level <= 7) {
4859 if (!acpi_evalf(sfan_handle, NULL, NULL, "vd", level))
4860 return -EIO;
4861 } else
4862 return -EINVAL;
4863 break;
4864
4865 case TPACPI_FAN_WR_ACPI_FANS:
4866 case TPACPI_FAN_WR_TPEC:
4867 if ((level != TP_EC_FAN_AUTO) &&
4868 (level != TP_EC_FAN_FULLSPEED) &&
4869 ((level < 0) || (level > 7)))
4870 return -EINVAL;
4871
4872 /* safety net should the EC not support AUTO
4873 * or FULLSPEED mode bits and just ignore them */
4874 if (level & TP_EC_FAN_FULLSPEED)
4875 level |= 7; /* safety min speed 7 */
4876 else if (level & TP_EC_FAN_AUTO)
4877 level |= 4; /* safety min speed 4 */
4878
4879 if (!acpi_ec_write(fan_status_offset, level))
4880 return -EIO;
4881 else
4882 tp_features.fan_ctrl_status_undef = 0;
4883 break;
4884
4885 default:
4886 return -ENXIO;
4887 }
4888 return 0;
4889 }
4890
4891 static int fan_set_level_safe(int level)
4892 {
4893 int rc;
4894
4895 if (!fan_control_allowed)
4896 return -EPERM;
4897
4898 if (mutex_lock_interruptible(&fan_mutex))
4899 return -ERESTARTSYS;
4900
4901 if (level == TPACPI_FAN_LAST_LEVEL)
4902 level = fan_control_desired_level;
4903
4904 rc = fan_set_level(level);
4905 if (!rc)
4906 fan_update_desired_level(level);
4907
4908 mutex_unlock(&fan_mutex);
4909 return rc;
4910 }
4911
4912 static int fan_set_enable(void)
4913 {
4914 u8 s;
4915 int rc;
4916
4917 if (!fan_control_allowed)
4918 return -EPERM;
4919
4920 if (mutex_lock_interruptible(&fan_mutex))
4921 return -ERESTARTSYS;
4922
4923 switch (fan_control_access_mode) {
4924 case TPACPI_FAN_WR_ACPI_FANS:
4925 case TPACPI_FAN_WR_TPEC:
4926 rc = fan_get_status(&s);
4927 if (rc < 0)
4928 break;
4929
4930 /* Don't go out of emergency fan mode */
4931 if (s != 7) {
4932 s &= 0x07;
4933 s |= TP_EC_FAN_AUTO | 4; /* min fan speed 4 */
4934 }
4935
4936 if (!acpi_ec_write(fan_status_offset, s))
4937 rc = -EIO;
4938 else {
4939 tp_features.fan_ctrl_status_undef = 0;
4940 rc = 0;
4941 }
4942 break;
4943
4944 case TPACPI_FAN_WR_ACPI_SFAN:
4945 rc = fan_get_status(&s);
4946 if (rc < 0)
4947 break;
4948
4949 s &= 0x07;
4950
4951 /* Set fan to at least level 4 */
4952 s |= 4;
4953
4954 if (!acpi_evalf(sfan_handle, NULL, NULL, "vd", s))
4955 rc = -EIO;
4956 else
4957 rc = 0;
4958 break;
4959
4960 default:
4961 rc = -ENXIO;
4962 }
4963
4964 mutex_unlock(&fan_mutex);
4965 return rc;
4966 }
4967
4968 static int fan_set_disable(void)
4969 {
4970 int rc;
4971
4972 if (!fan_control_allowed)
4973 return -EPERM;
4974
4975 if (mutex_lock_interruptible(&fan_mutex))
4976 return -ERESTARTSYS;
4977
4978 rc = 0;
4979 switch (fan_control_access_mode) {
4980 case TPACPI_FAN_WR_ACPI_FANS:
4981 case TPACPI_FAN_WR_TPEC:
4982 if (!acpi_ec_write(fan_status_offset, 0x00))
4983 rc = -EIO;
4984 else {
4985 fan_control_desired_level = 0;
4986 tp_features.fan_ctrl_status_undef = 0;
4987 }
4988 break;
4989
4990 case TPACPI_FAN_WR_ACPI_SFAN:
4991 if (!acpi_evalf(sfan_handle, NULL, NULL, "vd", 0x00))
4992 rc = -EIO;
4993 else
4994 fan_control_desired_level = 0;
4995 break;
4996
4997 default:
4998 rc = -ENXIO;
4999 }
5000
5001
5002 mutex_unlock(&fan_mutex);
5003 return rc;
5004 }
5005
5006 static int fan_set_speed(int speed)
5007 {
5008 int rc;
5009
5010 if (!fan_control_allowed)
5011 return -EPERM;
5012
5013 if (mutex_lock_interruptible(&fan_mutex))
5014 return -ERESTARTSYS;
5015
5016 rc = 0;
5017 switch (fan_control_access_mode) {
5018 case TPACPI_FAN_WR_ACPI_FANS:
5019 if (speed >= 0 && speed <= 65535) {
5020 if (!acpi_evalf(fans_handle, NULL, NULL, "vddd",
5021 speed, speed, speed))
5022 rc = -EIO;
5023 } else
5024 rc = -EINVAL;
5025 break;
5026
5027 default:
5028 rc = -ENXIO;
5029 }
5030
5031 mutex_unlock(&fan_mutex);
5032 return rc;
5033 }
5034
5035 static void fan_watchdog_reset(void)
5036 {
5037 static int fan_watchdog_active;
5038
5039 if (fan_control_access_mode == TPACPI_FAN_WR_NONE)
5040 return;
5041
5042 if (fan_watchdog_active)
5043 cancel_delayed_work(&fan_watchdog_task);
5044
5045 if (fan_watchdog_maxinterval > 0 &&
5046 tpacpi_lifecycle != TPACPI_LIFE_EXITING) {
5047 fan_watchdog_active = 1;
5048 if (!schedule_delayed_work(&fan_watchdog_task,
5049 msecs_to_jiffies(fan_watchdog_maxinterval
5050 * 1000))) {
5051 printk(TPACPI_ERR
5052 "failed to schedule the fan watchdog, "
5053 "watchdog will not trigger\n");
5054 }
5055 } else
5056 fan_watchdog_active = 0;
5057 }
5058
5059 static void fan_watchdog_fire(struct work_struct *ignored)
5060 {
5061 int rc;
5062
5063 if (tpacpi_lifecycle != TPACPI_LIFE_RUNNING)
5064 return;
5065
5066 printk(TPACPI_NOTICE "fan watchdog: enabling fan\n");
5067 rc = fan_set_enable();
5068 if (rc < 0) {
5069 printk(TPACPI_ERR "fan watchdog: error %d while enabling fan, "
5070 "will try again later...\n", -rc);
5071 /* reschedule for later */
5072 fan_watchdog_reset();
5073 }
5074 }
5075
5076 /*
5077 * SYSFS fan layout: hwmon compatible (device)
5078 *
5079 * pwm*_enable:
5080 * 0: "disengaged" mode
5081 * 1: manual mode
5082 * 2: native EC "auto" mode (recommended, hardware default)
5083 *
5084 * pwm*: set speed in manual mode, ignored otherwise.
5085 * 0 is level 0; 255 is level 7. Intermediate points done with linear
5086 * interpolation.
5087 *
5088 * fan*_input: tachometer reading, RPM
5089 *
5090 *
5091 * SYSFS fan layout: extensions
5092 *
5093 * fan_watchdog (driver):
5094 * fan watchdog interval in seconds, 0 disables (default), max 120
5095 */
5096
5097 /* sysfs fan pwm1_enable ----------------------------------------------- */
5098 static ssize_t fan_pwm1_enable_show(struct device *dev,
5099 struct device_attribute *attr,
5100 char *buf)
5101 {
5102 int res, mode;
5103 u8 status;
5104
5105 res = fan_get_status_safe(&status);
5106 if (res)
5107 return res;
5108
5109 if (unlikely(tp_features.fan_ctrl_status_undef)) {
5110 if (status != fan_control_initial_status) {
5111 tp_features.fan_ctrl_status_undef = 0;
5112 } else {
5113 /* Return most likely status. In fact, it
5114 * might be the only possible status */
5115 status = TP_EC_FAN_AUTO;
5116 }
5117 }
5118
5119 if (status & TP_EC_FAN_FULLSPEED) {
5120 mode = 0;
5121 } else if (status & TP_EC_FAN_AUTO) {
5122 mode = 2;
5123 } else
5124 mode = 1;
5125
5126 return snprintf(buf, PAGE_SIZE, "%d\n", mode);
5127 }
5128
5129 static ssize_t fan_pwm1_enable_store(struct device *dev,
5130 struct device_attribute *attr,
5131 const char *buf, size_t count)
5132 {
5133 unsigned long t;
5134 int res, level;
5135
5136 if (parse_strtoul(buf, 2, &t))
5137 return -EINVAL;
5138
5139 switch (t) {
5140 case 0:
5141 level = TP_EC_FAN_FULLSPEED;
5142 break;
5143 case 1:
5144 level = TPACPI_FAN_LAST_LEVEL;
5145 break;
5146 case 2:
5147 level = TP_EC_FAN_AUTO;
5148 break;
5149 case 3:
5150 /* reserved for software-controlled auto mode */
5151 return -ENOSYS;
5152 default:
5153 return -EINVAL;
5154 }
5155
5156 res = fan_set_level_safe(level);
5157 if (res == -ENXIO)
5158 return -EINVAL;
5159 else if (res < 0)
5160 return res;
5161
5162 fan_watchdog_reset();
5163
5164 return count;
5165 }
5166
5167 static struct device_attribute dev_attr_fan_pwm1_enable =
5168 __ATTR(pwm1_enable, S_IWUSR | S_IRUGO,
5169 fan_pwm1_enable_show, fan_pwm1_enable_store);
5170
5171 /* sysfs fan pwm1 ------------------------------------------------------ */
5172 static ssize_t fan_pwm1_show(struct device *dev,
5173 struct device_attribute *attr,
5174 char *buf)
5175 {
5176 int res;
5177 u8 status;
5178
5179 res = fan_get_status_safe(&status);
5180 if (res)
5181 return res;
5182
5183 if (unlikely(tp_features.fan_ctrl_status_undef)) {
5184 if (status != fan_control_initial_status) {
5185 tp_features.fan_ctrl_status_undef = 0;
5186 } else {
5187 status = TP_EC_FAN_AUTO;
5188 }
5189 }
5190
5191 if ((status &
5192 (TP_EC_FAN_AUTO | TP_EC_FAN_FULLSPEED)) != 0)
5193 status = fan_control_desired_level;
5194
5195 if (status > 7)
5196 status = 7;
5197
5198 return snprintf(buf, PAGE_SIZE, "%u\n", (status * 255) / 7);
5199 }
5200
5201 static ssize_t fan_pwm1_store(struct device *dev,
5202 struct device_attribute *attr,
5203 const char *buf, size_t count)
5204 {
5205 unsigned long s;
5206 int rc;
5207 u8 status, newlevel;
5208
5209 if (parse_strtoul(buf, 255, &s))
5210 return -EINVAL;
5211
5212 /* scale down from 0-255 to 0-7 */
5213 newlevel = (s >> 5) & 0x07;
5214
5215 if (mutex_lock_interruptible(&fan_mutex))
5216 return -ERESTARTSYS;
5217
5218 rc = fan_get_status(&status);
5219 if (!rc && (status &
5220 (TP_EC_FAN_AUTO | TP_EC_FAN_FULLSPEED)) == 0) {
5221 rc = fan_set_level(newlevel);
5222 if (rc == -ENXIO)
5223 rc = -EINVAL;
5224 else if (!rc) {
5225 fan_update_desired_level(newlevel);
5226 fan_watchdog_reset();
5227 }
5228 }
5229
5230 mutex_unlock(&fan_mutex);
5231 return (rc)? rc : count;
5232 }
5233
5234 static struct device_attribute dev_attr_fan_pwm1 =
5235 __ATTR(pwm1, S_IWUSR | S_IRUGO,
5236 fan_pwm1_show, fan_pwm1_store);
5237
5238 /* sysfs fan fan1_input ------------------------------------------------ */
5239 static ssize_t fan_fan1_input_show(struct device *dev,
5240 struct device_attribute *attr,
5241 char *buf)
5242 {
5243 int res;
5244 unsigned int speed;
5245
5246 res = fan_get_speed(&speed);
5247 if (res < 0)
5248 return res;
5249
5250 return snprintf(buf, PAGE_SIZE, "%u\n", speed);
5251 }
5252
5253 static struct device_attribute dev_attr_fan_fan1_input =
5254 __ATTR(fan1_input, S_IRUGO,
5255 fan_fan1_input_show, NULL);
5256
5257 /* sysfs fan fan_watchdog (hwmon driver) ------------------------------- */
5258 static ssize_t fan_fan_watchdog_show(struct device_driver *drv,
5259 char *buf)
5260 {
5261 return snprintf(buf, PAGE_SIZE, "%u\n", fan_watchdog_maxinterval);
5262 }
5263
5264 static ssize_t fan_fan_watchdog_store(struct device_driver *drv,
5265 const char *buf, size_t count)
5266 {
5267 unsigned long t;
5268
5269 if (parse_strtoul(buf, 120, &t))
5270 return -EINVAL;
5271
5272 if (!fan_control_allowed)
5273 return -EPERM;
5274
5275 fan_watchdog_maxinterval = t;
5276 fan_watchdog_reset();
5277
5278 return count;
5279 }
5280
5281 static DRIVER_ATTR(fan_watchdog, S_IWUSR | S_IRUGO,
5282 fan_fan_watchdog_show, fan_fan_watchdog_store);
5283
5284 /* --------------------------------------------------------------------- */
5285 static struct attribute *fan_attributes[] = {
5286 &dev_attr_fan_pwm1_enable.attr, &dev_attr_fan_pwm1.attr,
5287 &dev_attr_fan_fan1_input.attr,
5288 NULL
5289 };
5290
5291 static const struct attribute_group fan_attr_group = {
5292 .attrs = fan_attributes,
5293 };
5294
5295 static int __init fan_init(struct ibm_init_struct *iibm)
5296 {
5297 int rc;
5298
5299 vdbg_printk(TPACPI_DBG_INIT, "initializing fan subdriver\n");
5300
5301 mutex_init(&fan_mutex);
5302 fan_status_access_mode = TPACPI_FAN_NONE;
5303 fan_control_access_mode = TPACPI_FAN_WR_NONE;
5304 fan_control_commands = 0;
5305 fan_watchdog_maxinterval = 0;
5306 tp_features.fan_ctrl_status_undef = 0;
5307 fan_control_desired_level = 7;
5308
5309 TPACPI_ACPIHANDLE_INIT(fans);
5310 TPACPI_ACPIHANDLE_INIT(gfan);
5311 TPACPI_ACPIHANDLE_INIT(sfan);
5312
5313 if (gfan_handle) {
5314 /* 570, 600e/x, 770e, 770x */
5315 fan_status_access_mode = TPACPI_FAN_RD_ACPI_GFAN;
5316 } else {
5317 /* all other ThinkPads: note that even old-style
5318 * ThinkPad ECs supports the fan control register */
5319 if (likely(acpi_ec_read(fan_status_offset,
5320 &fan_control_initial_status))) {
5321 fan_status_access_mode = TPACPI_FAN_RD_TPEC;
5322
5323 /* In some ThinkPads, neither the EC nor the ACPI
5324 * DSDT initialize the fan status, and it ends up
5325 * being set to 0x07 when it *could* be either
5326 * 0x07 or 0x80.
5327 *
5328 * Enable for TP-1Y (T43), TP-78 (R51e),
5329 * TP-76 (R52), TP-70 (T43, R52), which are known
5330 * to be buggy. */
5331 if (fan_control_initial_status == 0x07) {
5332 switch (thinkpad_id.ec_model) {
5333 case 0x5931: /* TP-1Y */
5334 case 0x3837: /* TP-78 */
5335 case 0x3637: /* TP-76 */
5336 case 0x3037: /* TP-70 */
5337 printk(TPACPI_NOTICE
5338 "fan_init: initial fan status "
5339 "is unknown, assuming it is "
5340 "in auto mode\n");
5341 tp_features.fan_ctrl_status_undef = 1;
5342 ;;
5343 }
5344 }
5345 } else {
5346 printk(TPACPI_ERR
5347 "ThinkPad ACPI EC access misbehaving, "
5348 "fan status and control unavailable\n");
5349 return 1;
5350 }
5351 }
5352
5353 if (sfan_handle) {
5354 /* 570, 770x-JL */
5355 fan_control_access_mode = TPACPI_FAN_WR_ACPI_SFAN;
5356 fan_control_commands |=
5357 TPACPI_FAN_CMD_LEVEL | TPACPI_FAN_CMD_ENABLE;
5358 } else {
5359 if (!gfan_handle) {
5360 /* gfan without sfan means no fan control */
5361 /* all other models implement TP EC 0x2f control */
5362
5363 if (fans_handle) {
5364 /* X31, X40, X41 */
5365 fan_control_access_mode =
5366 TPACPI_FAN_WR_ACPI_FANS;
5367 fan_control_commands |=
5368 TPACPI_FAN_CMD_SPEED |
5369 TPACPI_FAN_CMD_LEVEL |
5370 TPACPI_FAN_CMD_ENABLE;
5371 } else {
5372 fan_control_access_mode = TPACPI_FAN_WR_TPEC;
5373 fan_control_commands |=
5374 TPACPI_FAN_CMD_LEVEL |
5375 TPACPI_FAN_CMD_ENABLE;
5376 }
5377 }
5378 }
5379
5380 vdbg_printk(TPACPI_DBG_INIT, "fan is %s, modes %d, %d\n",
5381 str_supported(fan_status_access_mode != TPACPI_FAN_NONE ||
5382 fan_control_access_mode != TPACPI_FAN_WR_NONE),
5383 fan_status_access_mode, fan_control_access_mode);
5384
5385 /* fan control master switch */
5386 if (!fan_control_allowed) {
5387 fan_control_access_mode = TPACPI_FAN_WR_NONE;
5388 fan_control_commands = 0;
5389 dbg_printk(TPACPI_DBG_INIT,
5390 "fan control features disabled by parameter\n");
5391 }
5392
5393 /* update fan_control_desired_level */
5394 if (fan_status_access_mode != TPACPI_FAN_NONE)
5395 fan_get_status_safe(NULL);
5396
5397 if (fan_status_access_mode != TPACPI_FAN_NONE ||
5398 fan_control_access_mode != TPACPI_FAN_WR_NONE) {
5399 rc = sysfs_create_group(&tpacpi_sensors_pdev->dev.kobj,
5400 &fan_attr_group);
5401 if (!(rc < 0))
5402 rc = driver_create_file(&tpacpi_hwmon_pdriver.driver,
5403 &driver_attr_fan_watchdog);
5404 if (rc < 0)
5405 return rc;
5406 return 0;
5407 } else
5408 return 1;
5409 }
5410
5411 static void fan_exit(void)
5412 {
5413 vdbg_printk(TPACPI_DBG_EXIT,
5414 "cancelling any pending fan watchdog tasks\n");
5415
5416 /* FIXME: can we really do this unconditionally? */
5417 sysfs_remove_group(&tpacpi_sensors_pdev->dev.kobj, &fan_attr_group);
5418 driver_remove_file(&tpacpi_hwmon_pdriver.driver,
5419 &driver_attr_fan_watchdog);
5420
5421 cancel_delayed_work(&fan_watchdog_task);
5422 flush_scheduled_work();
5423 }
5424
5425 static int fan_read(char *p)
5426 {
5427 int len = 0;
5428 int rc;
5429 u8 status;
5430 unsigned int speed = 0;
5431
5432 switch (fan_status_access_mode) {
5433 case TPACPI_FAN_RD_ACPI_GFAN:
5434 /* 570, 600e/x, 770e, 770x */
5435 rc = fan_get_status_safe(&status);
5436 if (rc < 0)
5437 return rc;
5438
5439 len += sprintf(p + len, "status:\t\t%s\n"
5440 "level:\t\t%d\n",
5441 (status != 0) ? "enabled" : "disabled", status);
5442 break;
5443
5444 case TPACPI_FAN_RD_TPEC:
5445 /* all except 570, 600e/x, 770e, 770x */
5446 rc = fan_get_status_safe(&status);
5447 if (rc < 0)
5448 return rc;
5449
5450 if (unlikely(tp_features.fan_ctrl_status_undef)) {
5451 if (status != fan_control_initial_status)
5452 tp_features.fan_ctrl_status_undef = 0;
5453 else
5454 /* Return most likely status. In fact, it
5455 * might be the only possible status */
5456 status = TP_EC_FAN_AUTO;
5457 }
5458
5459 len += sprintf(p + len, "status:\t\t%s\n",
5460 (status != 0) ? "enabled" : "disabled");
5461
5462 rc = fan_get_speed(&speed);
5463 if (rc < 0)
5464 return rc;
5465
5466 len += sprintf(p + len, "speed:\t\t%d\n", speed);
5467
5468 if (status & TP_EC_FAN_FULLSPEED)
5469 /* Disengaged mode takes precedence */
5470 len += sprintf(p + len, "level:\t\tdisengaged\n");
5471 else if (status & TP_EC_FAN_AUTO)
5472 len += sprintf(p + len, "level:\t\tauto\n");
5473 else
5474 len += sprintf(p + len, "level:\t\t%d\n", status);
5475 break;
5476
5477 case TPACPI_FAN_NONE:
5478 default:
5479 len += sprintf(p + len, "status:\t\tnot supported\n");
5480 }
5481
5482 if (fan_control_commands & TPACPI_FAN_CMD_LEVEL) {
5483 len += sprintf(p + len, "commands:\tlevel <level>");
5484
5485 switch (fan_control_access_mode) {
5486 case TPACPI_FAN_WR_ACPI_SFAN:
5487 len += sprintf(p + len, " (<level> is 0-7)\n");
5488 break;
5489
5490 default:
5491 len += sprintf(p + len, " (<level> is 0-7, "
5492 "auto, disengaged, full-speed)\n");
5493 break;
5494 }
5495 }
5496
5497 if (fan_control_commands & TPACPI_FAN_CMD_ENABLE)
5498 len += sprintf(p + len, "commands:\tenable, disable\n"
5499 "commands:\twatchdog <timeout> (<timeout> "
5500 "is 0 (off), 1-120 (seconds))\n");
5501
5502 if (fan_control_commands & TPACPI_FAN_CMD_SPEED)
5503 len += sprintf(p + len, "commands:\tspeed <speed>"
5504 " (<speed> is 0-65535)\n");
5505
5506 return len;
5507 }
5508
5509 static int fan_write_cmd_level(const char *cmd, int *rc)
5510 {
5511 int level;
5512
5513 if (strlencmp(cmd, "level auto") == 0)
5514 level = TP_EC_FAN_AUTO;
5515 else if ((strlencmp(cmd, "level disengaged") == 0) |
5516 (strlencmp(cmd, "level full-speed") == 0))
5517 level = TP_EC_FAN_FULLSPEED;
5518 else if (sscanf(cmd, "level %d", &level) != 1)
5519 return 0;
5520
5521 *rc = fan_set_level_safe(level);
5522 if (*rc == -ENXIO)
5523 printk(TPACPI_ERR "level command accepted for unsupported "
5524 "access mode %d", fan_control_access_mode);
5525
5526 return 1;
5527 }
5528
5529 static int fan_write_cmd_enable(const char *cmd, int *rc)
5530 {
5531 if (strlencmp(cmd, "enable") != 0)
5532 return 0;
5533
5534 *rc = fan_set_enable();
5535 if (*rc == -ENXIO)
5536 printk(TPACPI_ERR "enable command accepted for unsupported "
5537 "access mode %d", fan_control_access_mode);
5538
5539 return 1;
5540 }
5541
5542 static int fan_write_cmd_disable(const char *cmd, int *rc)
5543 {
5544 if (strlencmp(cmd, "disable") != 0)
5545 return 0;
5546
5547 *rc = fan_set_disable();
5548 if (*rc == -ENXIO)
5549 printk(TPACPI_ERR "disable command accepted for unsupported "
5550 "access mode %d", fan_control_access_mode);
5551
5552 return 1;
5553 }
5554
5555 static int fan_write_cmd_speed(const char *cmd, int *rc)
5556 {
5557 int speed;
5558
5559 /* TODO:
5560 * Support speed <low> <medium> <high> ? */
5561
5562 if (sscanf(cmd, "speed %d", &speed) != 1)
5563 return 0;
5564
5565 *rc = fan_set_speed(speed);
5566 if (*rc == -ENXIO)
5567 printk(TPACPI_ERR "speed command accepted for unsupported "
5568 "access mode %d", fan_control_access_mode);
5569
5570 return 1;
5571 }
5572
5573 static int fan_write_cmd_watchdog(const char *cmd, int *rc)
5574 {
5575 int interval;
5576
5577 if (sscanf(cmd, "watchdog %d", &interval) != 1)
5578 return 0;
5579
5580 if (interval < 0 || interval > 120)
5581 *rc = -EINVAL;
5582 else
5583 fan_watchdog_maxinterval = interval;
5584
5585 return 1;
5586 }
5587
5588 static int fan_write(char *buf)
5589 {
5590 char *cmd;
5591 int rc = 0;
5592
5593 while (!rc && (cmd = next_cmd(&buf))) {
5594 if (!((fan_control_commands & TPACPI_FAN_CMD_LEVEL) &&
5595 fan_write_cmd_level(cmd, &rc)) &&
5596 !((fan_control_commands & TPACPI_FAN_CMD_ENABLE) &&
5597 (fan_write_cmd_enable(cmd, &rc) ||
5598 fan_write_cmd_disable(cmd, &rc) ||
5599 fan_write_cmd_watchdog(cmd, &rc))) &&
5600 !((fan_control_commands & TPACPI_FAN_CMD_SPEED) &&
5601 fan_write_cmd_speed(cmd, &rc))
5602 )
5603 rc = -EINVAL;
5604 else if (!rc)
5605 fan_watchdog_reset();
5606 }
5607
5608 return rc;
5609 }
5610
5611 static struct ibm_struct fan_driver_data = {
5612 .name = "fan",
5613 .read = fan_read,
5614 .write = fan_write,
5615 .exit = fan_exit,
5616 };
5617
5618 /****************************************************************************
5619 ****************************************************************************
5620 *
5621 * Infrastructure
5622 *
5623 ****************************************************************************
5624 ****************************************************************************/
5625
5626 /* sysfs name ---------------------------------------------------------- */
5627 static ssize_t thinkpad_acpi_pdev_name_show(struct device *dev,
5628 struct device_attribute *attr,
5629 char *buf)
5630 {
5631 return snprintf(buf, PAGE_SIZE, "%s\n", TPACPI_NAME);
5632 }
5633
5634 static struct device_attribute dev_attr_thinkpad_acpi_pdev_name =
5635 __ATTR(name, S_IRUGO, thinkpad_acpi_pdev_name_show, NULL);
5636
5637 /* --------------------------------------------------------------------- */
5638
5639 /* /proc support */
5640 static struct proc_dir_entry *proc_dir;
5641
5642 /*
5643 * Module and infrastructure proble, init and exit handling
5644 */
5645
5646 static int force_load;
5647
5648 #ifdef CONFIG_THINKPAD_ACPI_DEBUG
5649 static const char * __init str_supported(int is_supported)
5650 {
5651 static char text_unsupported[] __initdata = "not supported";
5652
5653 return (is_supported)? &text_unsupported[4] : &text_unsupported[0];
5654 }
5655 #endif /* CONFIG_THINKPAD_ACPI_DEBUG */
5656
5657 static void ibm_exit(struct ibm_struct *ibm)
5658 {
5659 dbg_printk(TPACPI_DBG_EXIT, "removing %s\n", ibm->name);
5660
5661 list_del_init(&ibm->all_drivers);
5662
5663 if (ibm->flags.acpi_notify_installed) {
5664 dbg_printk(TPACPI_DBG_EXIT,
5665 "%s: acpi_remove_notify_handler\n", ibm->name);
5666 BUG_ON(!ibm->acpi);
5667 acpi_remove_notify_handler(*ibm->acpi->handle,
5668 ibm->acpi->type,
5669 dispatch_acpi_notify);
5670 ibm->flags.acpi_notify_installed = 0;
5671 ibm->flags.acpi_notify_installed = 0;
5672 }
5673
5674 if (ibm->flags.proc_created) {
5675 dbg_printk(TPACPI_DBG_EXIT,
5676 "%s: remove_proc_entry\n", ibm->name);
5677 remove_proc_entry(ibm->name, proc_dir);
5678 ibm->flags.proc_created = 0;
5679 }
5680
5681 if (ibm->flags.acpi_driver_registered) {
5682 dbg_printk(TPACPI_DBG_EXIT,
5683 "%s: acpi_bus_unregister_driver\n", ibm->name);
5684 BUG_ON(!ibm->acpi);
5685 acpi_bus_unregister_driver(ibm->acpi->driver);
5686 kfree(ibm->acpi->driver);
5687 ibm->acpi->driver = NULL;
5688 ibm->flags.acpi_driver_registered = 0;
5689 }
5690
5691 if (ibm->flags.init_called && ibm->exit) {
5692 ibm->exit();
5693 ibm->flags.init_called = 0;
5694 }
5695
5696 dbg_printk(TPACPI_DBG_INIT, "finished removing %s\n", ibm->name);
5697 }
5698
5699 static int __init ibm_init(struct ibm_init_struct *iibm)
5700 {
5701 int ret;
5702 struct ibm_struct *ibm = iibm->data;
5703 struct proc_dir_entry *entry;
5704
5705 BUG_ON(ibm == NULL);
5706
5707 INIT_LIST_HEAD(&ibm->all_drivers);
5708
5709 if (ibm->flags.experimental && !experimental)
5710 return 0;
5711
5712 dbg_printk(TPACPI_DBG_INIT,
5713 "probing for %s\n", ibm->name);
5714
5715 if (iibm->init) {
5716 ret = iibm->init(iibm);
5717 if (ret > 0)
5718 return 0; /* probe failed */
5719 if (ret)
5720 return ret;
5721
5722 ibm->flags.init_called = 1;
5723 }
5724
5725 if (ibm->acpi) {
5726 if (ibm->acpi->hid) {
5727 ret = register_tpacpi_subdriver(ibm);
5728 if (ret)
5729 goto err_out;
5730 }
5731
5732 if (ibm->acpi->notify) {
5733 ret = setup_acpi_notify(ibm);
5734 if (ret == -ENODEV) {
5735 printk(TPACPI_NOTICE "disabling subdriver %s\n",
5736 ibm->name);
5737 ret = 0;
5738 goto err_out;
5739 }
5740 if (ret < 0)
5741 goto err_out;
5742 }
5743 }
5744
5745 dbg_printk(TPACPI_DBG_INIT,
5746 "%s installed\n", ibm->name);
5747
5748 if (ibm->read) {
5749 entry = create_proc_entry(ibm->name,
5750 S_IFREG | S_IRUGO | S_IWUSR,
5751 proc_dir);
5752 if (!entry) {
5753 printk(TPACPI_ERR "unable to create proc entry %s\n",
5754 ibm->name);
5755 ret = -ENODEV;
5756 goto err_out;
5757 }
5758 entry->owner = THIS_MODULE;
5759 entry->data = ibm;
5760 entry->read_proc = &dispatch_procfs_read;
5761 if (ibm->write)
5762 entry->write_proc = &dispatch_procfs_write;
5763 ibm->flags.proc_created = 1;
5764 }
5765
5766 list_add_tail(&ibm->all_drivers, &tpacpi_all_drivers);
5767
5768 return 0;
5769
5770 err_out:
5771 dbg_printk(TPACPI_DBG_INIT,
5772 "%s: at error exit path with result %d\n",
5773 ibm->name, ret);
5774
5775 ibm_exit(ibm);
5776 return (ret < 0)? ret : 0;
5777 }
5778
5779 /* Probing */
5780
5781 static void __init get_thinkpad_model_data(struct thinkpad_id_data *tp)
5782 {
5783 const struct dmi_device *dev = NULL;
5784 char ec_fw_string[18];
5785
5786 if (!tp)
5787 return;
5788
5789 memset(tp, 0, sizeof(*tp));
5790
5791 if (dmi_name_in_vendors("IBM"))
5792 tp->vendor = PCI_VENDOR_ID_IBM;
5793 else if (dmi_name_in_vendors("LENOVO"))
5794 tp->vendor = PCI_VENDOR_ID_LENOVO;
5795 else
5796 return;
5797
5798 tp->bios_version_str = kstrdup(dmi_get_system_info(DMI_BIOS_VERSION),
5799 GFP_KERNEL);
5800 if (!tp->bios_version_str)
5801 return;
5802 tp->bios_model = tp->bios_version_str[0]
5803 | (tp->bios_version_str[1] << 8);
5804
5805 /*
5806 * ThinkPad T23 or newer, A31 or newer, R50e or newer,
5807 * X32 or newer, all Z series; Some models must have an
5808 * up-to-date BIOS or they will not be detected.
5809 *
5810 * See http://thinkwiki.org/wiki/List_of_DMI_IDs
5811 */
5812 while ((dev = dmi_find_device(DMI_DEV_TYPE_OEM_STRING, NULL, dev))) {
5813 if (sscanf(dev->name,
5814 "IBM ThinkPad Embedded Controller -[%17c",
5815 ec_fw_string) == 1) {
5816 ec_fw_string[sizeof(ec_fw_string) - 1] = 0;
5817 ec_fw_string[strcspn(ec_fw_string, " ]")] = 0;
5818
5819 tp->ec_version_str = kstrdup(ec_fw_string, GFP_KERNEL);
5820 tp->ec_model = ec_fw_string[0]
5821 | (ec_fw_string[1] << 8);
5822 break;
5823 }
5824 }
5825
5826 tp->model_str = kstrdup(dmi_get_system_info(DMI_PRODUCT_VERSION),
5827 GFP_KERNEL);
5828 if (strnicmp(tp->model_str, "ThinkPad", 8) != 0) {
5829 kfree(tp->model_str);
5830 tp->model_str = NULL;
5831 }
5832 }
5833
5834 static int __init probe_for_thinkpad(void)
5835 {
5836 int is_thinkpad;
5837
5838 if (acpi_disabled)
5839 return -ENODEV;
5840
5841 /*
5842 * Non-ancient models have better DMI tagging, but very old models
5843 * don't.
5844 */
5845 is_thinkpad = (thinkpad_id.model_str != NULL);
5846
5847 /* ec is required because many other handles are relative to it */
5848 TPACPI_ACPIHANDLE_INIT(ec);
5849 if (!ec_handle) {
5850 if (is_thinkpad)
5851 printk(TPACPI_ERR
5852 "Not yet supported ThinkPad detected!\n");
5853 return -ENODEV;
5854 }
5855
5856 /*
5857 * Risks a regression on very old machines, but reduces potential
5858 * false positives a damn great deal
5859 */
5860 if (!is_thinkpad)
5861 is_thinkpad = (thinkpad_id.vendor == PCI_VENDOR_ID_IBM);
5862
5863 if (!is_thinkpad && !force_load)
5864 return -ENODEV;
5865
5866 return 0;
5867 }
5868
5869
5870 /* Module init, exit, parameters */
5871
5872 static struct ibm_init_struct ibms_init[] __initdata = {
5873 {
5874 .init = thinkpad_acpi_driver_init,
5875 .data = &thinkpad_acpi_driver_data,
5876 },
5877 {
5878 .init = hotkey_init,
5879 .data = &hotkey_driver_data,
5880 },
5881 {
5882 .init = bluetooth_init,
5883 .data = &bluetooth_driver_data,
5884 },
5885 {
5886 .init = wan_init,
5887 .data = &wan_driver_data,
5888 },
5889 #ifdef CONFIG_THINKPAD_ACPI_VIDEO
5890 {
5891 .init = video_init,
5892 .data = &video_driver_data,
5893 },
5894 #endif
5895 {
5896 .init = light_init,
5897 .data = &light_driver_data,
5898 },
5899 #ifdef CONFIG_THINKPAD_ACPI_DOCK
5900 {
5901 .init = dock_init,
5902 .data = &dock_driver_data[0],
5903 },
5904 {
5905 .init = dock_init2,
5906 .data = &dock_driver_data[1],
5907 },
5908 #endif
5909 #ifdef CONFIG_THINKPAD_ACPI_BAY
5910 {
5911 .init = bay_init,
5912 .data = &bay_driver_data,
5913 },
5914 #endif
5915 {
5916 .init = cmos_init,
5917 .data = &cmos_driver_data,
5918 },
5919 {
5920 .init = led_init,
5921 .data = &led_driver_data,
5922 },
5923 {
5924 .init = beep_init,
5925 .data = &beep_driver_data,
5926 },
5927 {
5928 .init = thermal_init,
5929 .data = &thermal_driver_data,
5930 },
5931 {
5932 .data = &ecdump_driver_data,
5933 },
5934 {
5935 .init = brightness_init,
5936 .data = &brightness_driver_data,
5937 },
5938 {
5939 .data = &volume_driver_data,
5940 },
5941 {
5942 .init = fan_init,
5943 .data = &fan_driver_data,
5944 },
5945 };
5946
5947 static int __init set_ibm_param(const char *val, struct kernel_param *kp)
5948 {
5949 unsigned int i;
5950 struct ibm_struct *ibm;
5951
5952 if (!kp || !kp->name || !val)
5953 return -EINVAL;
5954
5955 for (i = 0; i < ARRAY_SIZE(ibms_init); i++) {
5956 ibm = ibms_init[i].data;
5957 WARN_ON(ibm == NULL);
5958
5959 if (!ibm || !ibm->name)
5960 continue;
5961
5962 if (strcmp(ibm->name, kp->name) == 0 && ibm->write) {
5963 if (strlen(val) > sizeof(ibms_init[i].param) - 2)
5964 return -ENOSPC;
5965 strcpy(ibms_init[i].param, val);
5966 strcat(ibms_init[i].param, ",");
5967 return 0;
5968 }
5969 }
5970
5971 return -EINVAL;
5972 }
5973
5974 module_param(experimental, int, 0);
5975 MODULE_PARM_DESC(experimental,
5976 "Enables experimental features when non-zero");
5977
5978 module_param_named(debug, dbg_level, uint, 0);
5979 MODULE_PARM_DESC(debug, "Sets debug level bit-mask");
5980
5981 module_param(force_load, bool, 0);
5982 MODULE_PARM_DESC(force_load,
5983 "Attempts to load the driver even on a "
5984 "mis-identified ThinkPad when true");
5985
5986 module_param_named(fan_control, fan_control_allowed, bool, 0);
5987 MODULE_PARM_DESC(fan_control,
5988 "Enables setting fan parameters features when true");
5989
5990 module_param_named(brightness_mode, brightness_mode, int, 0);
5991 MODULE_PARM_DESC(brightness_mode,
5992 "Selects brightness control strategy: "
5993 "0=auto, 1=EC, 2=CMOS, 3=both");
5994
5995 module_param(brightness_enable, uint, 0);
5996 MODULE_PARM_DESC(brightness_enable,
5997 "Enables backlight control when 1, disables when 0");
5998
5999 module_param(hotkey_report_mode, uint, 0);
6000 MODULE_PARM_DESC(hotkey_report_mode,
6001 "used for backwards compatibility with userspace, "
6002 "see documentation");
6003
6004 #define TPACPI_PARAM(feature) \
6005 module_param_call(feature, set_ibm_param, NULL, NULL, 0); \
6006 MODULE_PARM_DESC(feature, "Simulates thinkpad-acpi procfs command " \
6007 "at module load, see documentation")
6008
6009 TPACPI_PARAM(hotkey);
6010 TPACPI_PARAM(bluetooth);
6011 TPACPI_PARAM(video);
6012 TPACPI_PARAM(light);
6013 #ifdef CONFIG_THINKPAD_ACPI_DOCK
6014 TPACPI_PARAM(dock);
6015 #endif
6016 #ifdef CONFIG_THINKPAD_ACPI_BAY
6017 TPACPI_PARAM(bay);
6018 #endif /* CONFIG_THINKPAD_ACPI_BAY */
6019 TPACPI_PARAM(cmos);
6020 TPACPI_PARAM(led);
6021 TPACPI_PARAM(beep);
6022 TPACPI_PARAM(ecdump);
6023 TPACPI_PARAM(brightness);
6024 TPACPI_PARAM(volume);
6025 TPACPI_PARAM(fan);
6026
6027 static void thinkpad_acpi_module_exit(void)
6028 {
6029 struct ibm_struct *ibm, *itmp;
6030
6031 tpacpi_lifecycle = TPACPI_LIFE_EXITING;
6032
6033 list_for_each_entry_safe_reverse(ibm, itmp,
6034 &tpacpi_all_drivers,
6035 all_drivers) {
6036 ibm_exit(ibm);
6037 }
6038
6039 dbg_printk(TPACPI_DBG_INIT, "finished subdriver exit path...\n");
6040
6041 if (tpacpi_inputdev) {
6042 if (tp_features.input_device_registered)
6043 input_unregister_device(tpacpi_inputdev);
6044 else
6045 input_free_device(tpacpi_inputdev);
6046 }
6047
6048 if (tpacpi_hwmon)
6049 hwmon_device_unregister(tpacpi_hwmon);
6050
6051 if (tp_features.sensors_pdev_attrs_registered)
6052 device_remove_file(&tpacpi_sensors_pdev->dev,
6053 &dev_attr_thinkpad_acpi_pdev_name);
6054 if (tpacpi_sensors_pdev)
6055 platform_device_unregister(tpacpi_sensors_pdev);
6056 if (tpacpi_pdev)
6057 platform_device_unregister(tpacpi_pdev);
6058
6059 if (tp_features.sensors_pdrv_attrs_registered)
6060 tpacpi_remove_driver_attributes(&tpacpi_hwmon_pdriver.driver);
6061 if (tp_features.platform_drv_attrs_registered)
6062 tpacpi_remove_driver_attributes(&tpacpi_pdriver.driver);
6063
6064 if (tp_features.sensors_pdrv_registered)
6065 platform_driver_unregister(&tpacpi_hwmon_pdriver);
6066
6067 if (tp_features.platform_drv_registered)
6068 platform_driver_unregister(&tpacpi_pdriver);
6069
6070 if (proc_dir)
6071 remove_proc_entry(TPACPI_PROC_DIR, acpi_root_dir);
6072
6073 kfree(thinkpad_id.bios_version_str);
6074 kfree(thinkpad_id.ec_version_str);
6075 kfree(thinkpad_id.model_str);
6076 }
6077
6078
6079 static int __init thinkpad_acpi_module_init(void)
6080 {
6081 int ret, i;
6082
6083 tpacpi_lifecycle = TPACPI_LIFE_INIT;
6084
6085 /* Parameter checking */
6086 if (hotkey_report_mode > 2)
6087 return -EINVAL;
6088
6089 /* Driver-level probe */
6090
6091 get_thinkpad_model_data(&thinkpad_id);
6092 ret = probe_for_thinkpad();
6093 if (ret) {
6094 thinkpad_acpi_module_exit();
6095 return ret;
6096 }
6097
6098 /* Driver initialization */
6099
6100 TPACPI_ACPIHANDLE_INIT(ecrd);
6101 TPACPI_ACPIHANDLE_INIT(ecwr);
6102
6103 proc_dir = proc_mkdir(TPACPI_PROC_DIR, acpi_root_dir);
6104 if (!proc_dir) {
6105 printk(TPACPI_ERR
6106 "unable to create proc dir " TPACPI_PROC_DIR);
6107 thinkpad_acpi_module_exit();
6108 return -ENODEV;
6109 }
6110 proc_dir->owner = THIS_MODULE;
6111
6112 ret = platform_driver_register(&tpacpi_pdriver);
6113 if (ret) {
6114 printk(TPACPI_ERR
6115 "unable to register main platform driver\n");
6116 thinkpad_acpi_module_exit();
6117 return ret;
6118 }
6119 tp_features.platform_drv_registered = 1;
6120
6121 ret = platform_driver_register(&tpacpi_hwmon_pdriver);
6122 if (ret) {
6123 printk(TPACPI_ERR
6124 "unable to register hwmon platform driver\n");
6125 thinkpad_acpi_module_exit();
6126 return ret;
6127 }
6128 tp_features.sensors_pdrv_registered = 1;
6129
6130 ret = tpacpi_create_driver_attributes(&tpacpi_pdriver.driver);
6131 if (!ret) {
6132 tp_features.platform_drv_attrs_registered = 1;
6133 ret = tpacpi_create_driver_attributes(
6134 &tpacpi_hwmon_pdriver.driver);
6135 }
6136 if (ret) {
6137 printk(TPACPI_ERR
6138 "unable to create sysfs driver attributes\n");
6139 thinkpad_acpi_module_exit();
6140 return ret;
6141 }
6142 tp_features.sensors_pdrv_attrs_registered = 1;
6143
6144
6145 /* Device initialization */
6146 tpacpi_pdev = platform_device_register_simple(TPACPI_DRVR_NAME, -1,
6147 NULL, 0);
6148 if (IS_ERR(tpacpi_pdev)) {
6149 ret = PTR_ERR(tpacpi_pdev);
6150 tpacpi_pdev = NULL;
6151 printk(TPACPI_ERR "unable to register platform device\n");
6152 thinkpad_acpi_module_exit();
6153 return ret;
6154 }
6155 tpacpi_sensors_pdev = platform_device_register_simple(
6156 TPACPI_HWMON_DRVR_NAME,
6157 -1, NULL, 0);
6158 if (IS_ERR(tpacpi_sensors_pdev)) {
6159 ret = PTR_ERR(tpacpi_sensors_pdev);
6160 tpacpi_sensors_pdev = NULL;
6161 printk(TPACPI_ERR
6162 "unable to register hwmon platform device\n");
6163 thinkpad_acpi_module_exit();
6164 return ret;
6165 }
6166 ret = device_create_file(&tpacpi_sensors_pdev->dev,
6167 &dev_attr_thinkpad_acpi_pdev_name);
6168 if (ret) {
6169 printk(TPACPI_ERR
6170 "unable to create sysfs hwmon device attributes\n");
6171 thinkpad_acpi_module_exit();
6172 return ret;
6173 }
6174 tp_features.sensors_pdev_attrs_registered = 1;
6175 tpacpi_hwmon = hwmon_device_register(&tpacpi_sensors_pdev->dev);
6176 if (IS_ERR(tpacpi_hwmon)) {
6177 ret = PTR_ERR(tpacpi_hwmon);
6178 tpacpi_hwmon = NULL;
6179 printk(TPACPI_ERR "unable to register hwmon device\n");
6180 thinkpad_acpi_module_exit();
6181 return ret;
6182 }
6183 mutex_init(&tpacpi_inputdev_send_mutex);
6184 tpacpi_inputdev = input_allocate_device();
6185 if (!tpacpi_inputdev) {
6186 printk(TPACPI_ERR "unable to allocate input device\n");
6187 thinkpad_acpi_module_exit();
6188 return -ENOMEM;
6189 } else {
6190 /* Prepare input device, but don't register */
6191 tpacpi_inputdev->name = "ThinkPad Extra Buttons";
6192 tpacpi_inputdev->phys = TPACPI_DRVR_NAME "/input0";
6193 tpacpi_inputdev->id.bustype = BUS_HOST;
6194 tpacpi_inputdev->id.vendor = (thinkpad_id.vendor) ?
6195 thinkpad_id.vendor :
6196 PCI_VENDOR_ID_IBM;
6197 tpacpi_inputdev->id.product = TPACPI_HKEY_INPUT_PRODUCT;
6198 tpacpi_inputdev->id.version = TPACPI_HKEY_INPUT_VERSION;
6199 }
6200 for (i = 0; i < ARRAY_SIZE(ibms_init); i++) {
6201 ret = ibm_init(&ibms_init[i]);
6202 if (ret >= 0 && *ibms_init[i].param)
6203 ret = ibms_init[i].data->write(ibms_init[i].param);
6204 if (ret < 0) {
6205 thinkpad_acpi_module_exit();
6206 return ret;
6207 }
6208 }
6209 ret = input_register_device(tpacpi_inputdev);
6210 if (ret < 0) {
6211 printk(TPACPI_ERR "unable to register input device\n");
6212 thinkpad_acpi_module_exit();
6213 return ret;
6214 } else {
6215 tp_features.input_device_registered = 1;
6216 }
6217
6218 tpacpi_lifecycle = TPACPI_LIFE_RUNNING;
6219 return 0;
6220 }
6221
6222 /* Please remove this in year 2009 */
6223 MODULE_ALIAS("ibm_acpi");
6224
6225 /*
6226 * DMI matching for module autoloading
6227 *
6228 * See http://thinkwiki.org/wiki/List_of_DMI_IDs
6229 * See http://thinkwiki.org/wiki/BIOS_Upgrade_Downloads
6230 *
6231 * Only models listed in thinkwiki will be supported, so add yours
6232 * if it is not there yet.
6233 */
6234 #define IBM_BIOS_MODULE_ALIAS(__type) \
6235 MODULE_ALIAS("dmi:bvnIBM:bvr" __type "ET??WW")
6236
6237 /* Non-ancient thinkpads */
6238 MODULE_ALIAS("dmi:bvnIBM:*:svnIBM:*:pvrThinkPad*:rvnIBM:*");
6239 MODULE_ALIAS("dmi:bvnLENOVO:*:svnLENOVO:*:pvrThinkPad*:rvnLENOVO:*");
6240
6241 /* Ancient thinkpad BIOSes have to be identified by
6242 * BIOS type or model number, and there are far less
6243 * BIOS types than model numbers... */
6244 IBM_BIOS_MODULE_ALIAS("I[B,D,H,I,M,N,O,T,W,V,Y,Z]");
6245 IBM_BIOS_MODULE_ALIAS("1[0,3,6,8,A-G,I,K,M-P,S,T]");
6246 IBM_BIOS_MODULE_ALIAS("K[U,X-Z]");
6247
6248 MODULE_AUTHOR("Borislav Deianov, Henrique de Moraes Holschuh");
6249 MODULE_DESCRIPTION(TPACPI_DESC);
6250 MODULE_VERSION(TPACPI_VERSION);
6251 MODULE_LICENSE("GPL");
6252
6253 module_init(thinkpad_acpi_module_init);
6254 module_exit(thinkpad_acpi_module_exit);
Linux kernel - Deliverables
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