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[SCSI] transport_class: BUG if we can't release the attribute container
[linux-2.6/kvm.git] / drivers / misc / thinkpad_acpi.c
blob6cb781262f947611a20916bf6b996c9ff3e713cb
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 *status = ((s & TP_HOTKEY_TABLET_MASK) != 0);
1082 return 0;
1083 }
1084
1085 /*
1086 * Call with hotkey_mutex held
1087 */
1088 static int hotkey_mask_get(void)
1089 {
1090 u32 m = 0;
1091
1092 if (tp_features.hotkey_mask) {
1093 if (!acpi_evalf(hkey_handle, &m, "DHKN", "d"))
1094 return -EIO;
1095 }
1096 hotkey_mask = m | (hotkey_source_mask & hotkey_mask);
1097
1098 return 0;
1099 }
1100
1101 /*
1102 * Call with hotkey_mutex held
1103 */
1104 static int hotkey_mask_set(u32 mask)
1105 {
1106 int i;
1107 int rc = 0;
1108
1109 if (tp_features.hotkey_mask) {
1110 HOTKEY_CONFIG_CRITICAL_START
1111 for (i = 0; i < 32; i++) {
1112 u32 m = 1 << i;
1113 /* enable in firmware mask only keys not in NVRAM
1114 * mode, but enable the key in the cached hotkey_mask
1115 * regardless of mode, or the key will end up
1116 * disabled by hotkey_mask_get() */
1117 if (!acpi_evalf(hkey_handle,
1118 NULL, "MHKM", "vdd", i + 1,
1119 !!((mask & ~hotkey_source_mask) & m))) {
1120 rc = -EIO;
1121 break;
1122 } else {
1123 hotkey_mask = (hotkey_mask & ~m) | (mask & m);
1124 }
1125 }
1126 HOTKEY_CONFIG_CRITICAL_END
1127
1128 /* hotkey_mask_get must be called unconditionally below */
1129 if (!hotkey_mask_get() && !rc &&
1130 (hotkey_mask & ~hotkey_source_mask) !=
1131 (mask & ~hotkey_source_mask)) {
1132 printk(TPACPI_NOTICE
1133 "requested hot key mask 0x%08x, but "
1134 "firmware forced it to 0x%08x\n",
1135 mask, hotkey_mask);
1136 }
1137 } else {
1138 #ifdef CONFIG_THINKPAD_ACPI_HOTKEY_POLL
1139 HOTKEY_CONFIG_CRITICAL_START
1140 hotkey_mask = mask & hotkey_source_mask;
1141 HOTKEY_CONFIG_CRITICAL_END
1142 hotkey_mask_get();
1143 if (hotkey_mask != mask) {
1144 printk(TPACPI_NOTICE
1145 "requested hot key mask 0x%08x, "
1146 "forced to 0x%08x (NVRAM poll mask is "
1147 "0x%08x): no firmware mask support\n",
1148 mask, hotkey_mask, hotkey_source_mask);
1149 }
1150 #else
1151 hotkey_mask_get();
1152 rc = -ENXIO;
1153 #endif /* CONFIG_THINKPAD_ACPI_HOTKEY_POLL */
1154 }
1155
1156 return rc;
1157 }
1158
1159 static int hotkey_status_get(int *status)
1160 {
1161 if (!acpi_evalf(hkey_handle, status, "DHKC", "d"))
1162 return -EIO;
1163
1164 return 0;
1165 }
1166
1167 static int hotkey_status_set(int status)
1168 {
1169 if (!acpi_evalf(hkey_handle, NULL, "MHKC", "vd", status))
1170 return -EIO;
1171
1172 return 0;
1173 }
1174
1175 static void tpacpi_input_send_radiosw(void)
1176 {
1177 int wlsw;
1178
1179 if (tp_features.hotkey_wlsw && !hotkey_get_wlsw(&wlsw)) {
1180 mutex_lock(&tpacpi_inputdev_send_mutex);
1181
1182 input_report_switch(tpacpi_inputdev,
1183 SW_RADIO, !!wlsw);
1184 input_sync(tpacpi_inputdev);
1185
1186 mutex_unlock(&tpacpi_inputdev_send_mutex);
1187 }
1188 }
1189
1190 static void tpacpi_input_send_tabletsw(void)
1191 {
1192 int state;
1193
1194 if (tp_features.hotkey_tablet &&
1195 !hotkey_get_tablet_mode(&state)) {
1196 mutex_lock(&tpacpi_inputdev_send_mutex);
1197
1198 input_report_switch(tpacpi_inputdev,
1199 SW_TABLET_MODE, !!state);
1200 input_sync(tpacpi_inputdev);
1201
1202 mutex_unlock(&tpacpi_inputdev_send_mutex);
1203 }
1204 }
1205
1206 static void tpacpi_input_send_key(unsigned int scancode)
1207 {
1208 unsigned int keycode;
1209
1210 keycode = hotkey_keycode_map[scancode];
1211
1212 if (keycode != KEY_RESERVED) {
1213 mutex_lock(&tpacpi_inputdev_send_mutex);
1214
1215 input_report_key(tpacpi_inputdev, keycode, 1);
1216 if (keycode == KEY_UNKNOWN)
1217 input_event(tpacpi_inputdev, EV_MSC, MSC_SCAN,
1218 scancode);
1219 input_sync(tpacpi_inputdev);
1220
1221 input_report_key(tpacpi_inputdev, keycode, 0);
1222 if (keycode == KEY_UNKNOWN)
1223 input_event(tpacpi_inputdev, EV_MSC, MSC_SCAN,
1224 scancode);
1225 input_sync(tpacpi_inputdev);
1226
1227 mutex_unlock(&tpacpi_inputdev_send_mutex);
1228 }
1229 }
1230
1231 #ifdef CONFIG_THINKPAD_ACPI_HOTKEY_POLL
1232 static struct tp_acpi_drv_struct ibm_hotkey_acpidriver;
1233
1234 static void tpacpi_hotkey_send_key(unsigned int scancode)
1235 {
1236 tpacpi_input_send_key(scancode);
1237 if (hotkey_report_mode < 2) {
1238 acpi_bus_generate_proc_event(ibm_hotkey_acpidriver.device,
1239 0x80, 0x1001 + scancode);
1240 }
1241 }
1242
1243 static void hotkey_read_nvram(struct tp_nvram_state *n, u32 m)
1244 {
1245 u8 d;
1246
1247 if (m & TP_NVRAM_HKEY_GROUP_HK2) {
1248 d = nvram_read_byte(TP_NVRAM_ADDR_HK2);
1249 n->thinkpad_toggle = !!(d & TP_NVRAM_MASK_HKT_THINKPAD);
1250 n->zoom_toggle = !!(d & TP_NVRAM_MASK_HKT_ZOOM);
1251 n->display_toggle = !!(d & TP_NVRAM_MASK_HKT_DISPLAY);
1252 n->hibernate_toggle = !!(d & TP_NVRAM_MASK_HKT_HIBERNATE);
1253 }
1254 if (m & TP_ACPI_HKEY_THNKLGHT_MASK) {
1255 d = nvram_read_byte(TP_NVRAM_ADDR_THINKLIGHT);
1256 n->thinklight_toggle = !!(d & TP_NVRAM_MASK_THINKLIGHT);
1257 }
1258 if (m & TP_ACPI_HKEY_DISPXPAND_MASK) {
1259 d = nvram_read_byte(TP_NVRAM_ADDR_VIDEO);
1260 n->displayexp_toggle =
1261 !!(d & TP_NVRAM_MASK_HKT_DISPEXPND);
1262 }
1263 if (m & TP_NVRAM_HKEY_GROUP_BRIGHTNESS) {
1264 d = nvram_read_byte(TP_NVRAM_ADDR_BRIGHTNESS);
1265 n->brightness_level = (d & TP_NVRAM_MASK_LEVEL_BRIGHTNESS)
1266 >> TP_NVRAM_POS_LEVEL_BRIGHTNESS;
1267 n->brightness_toggle =
1268 !!(d & TP_NVRAM_MASK_HKT_BRIGHTNESS);
1269 }
1270 if (m & TP_NVRAM_HKEY_GROUP_VOLUME) {
1271 d = nvram_read_byte(TP_NVRAM_ADDR_MIXER);
1272 n->volume_level = (d & TP_NVRAM_MASK_LEVEL_VOLUME)
1273 >> TP_NVRAM_POS_LEVEL_VOLUME;
1274 n->mute = !!(d & TP_NVRAM_MASK_MUTE);
1275 n->volume_toggle = !!(d & TP_NVRAM_MASK_HKT_VOLUME);
1276 }
1277 }
1278
1279 #define TPACPI_COMPARE_KEY(__scancode, __member) \
1280 do { \
1281 if ((mask & (1 << __scancode)) && \
1282 oldn->__member != newn->__member) \
1283 tpacpi_hotkey_send_key(__scancode); \
1284 } while (0)
1285
1286 #define TPACPI_MAY_SEND_KEY(__scancode) \
1287 do { if (mask & (1 << __scancode)) \
1288 tpacpi_hotkey_send_key(__scancode); } while (0)
1289
1290 static void hotkey_compare_and_issue_event(struct tp_nvram_state *oldn,
1291 struct tp_nvram_state *newn,
1292 u32 mask)
1293 {
1294 TPACPI_COMPARE_KEY(TP_ACPI_HOTKEYSCAN_THINKPAD, thinkpad_toggle);
1295 TPACPI_COMPARE_KEY(TP_ACPI_HOTKEYSCAN_FNSPACE, zoom_toggle);
1296 TPACPI_COMPARE_KEY(TP_ACPI_HOTKEYSCAN_FNF7, display_toggle);
1297 TPACPI_COMPARE_KEY(TP_ACPI_HOTKEYSCAN_FNF12, hibernate_toggle);
1298
1299 TPACPI_COMPARE_KEY(TP_ACPI_HOTKEYSCAN_FNPAGEUP, thinklight_toggle);
1300
1301 TPACPI_COMPARE_KEY(TP_ACPI_HOTKEYSCAN_FNF8, displayexp_toggle);
1302
1303 /* handle volume */
1304 if (oldn->volume_toggle != newn->volume_toggle) {
1305 if (oldn->mute != newn->mute) {
1306 TPACPI_MAY_SEND_KEY(TP_ACPI_HOTKEYSCAN_MUTE);
1307 }
1308 if (oldn->volume_level > newn->volume_level) {
1309 TPACPI_MAY_SEND_KEY(TP_ACPI_HOTKEYSCAN_VOLUMEDOWN);
1310 } else if (oldn->volume_level < newn->volume_level) {
1311 TPACPI_MAY_SEND_KEY(TP_ACPI_HOTKEYSCAN_VOLUMEUP);
1312 } else if (oldn->mute == newn->mute) {
1313 /* repeated key presses that didn't change state */
1314 if (newn->mute) {
1315 TPACPI_MAY_SEND_KEY(TP_ACPI_HOTKEYSCAN_MUTE);
1316 } else if (newn->volume_level != 0) {
1317 TPACPI_MAY_SEND_KEY(TP_ACPI_HOTKEYSCAN_VOLUMEUP);
1318 } else {
1319 TPACPI_MAY_SEND_KEY(TP_ACPI_HOTKEYSCAN_VOLUMEDOWN);
1320 }
1321 }
1322 }
1323
1324 /* handle brightness */
1325 if (oldn->brightness_toggle != newn->brightness_toggle) {
1326 if (oldn->brightness_level < newn->brightness_level) {
1327 TPACPI_MAY_SEND_KEY(TP_ACPI_HOTKEYSCAN_FNHOME);
1328 } else if (oldn->brightness_level > newn->brightness_level) {
1329 TPACPI_MAY_SEND_KEY(TP_ACPI_HOTKEYSCAN_FNEND);
1330 } else {
1331 /* repeated key presses that didn't change state */
1332 if (newn->brightness_level != 0) {
1333 TPACPI_MAY_SEND_KEY(TP_ACPI_HOTKEYSCAN_FNHOME);
1334 } else {
1335 TPACPI_MAY_SEND_KEY(TP_ACPI_HOTKEYSCAN_FNEND);
1336 }
1337 }
1338 }
1339 }
1340
1341 #undef TPACPI_COMPARE_KEY
1342 #undef TPACPI_MAY_SEND_KEY
1343
1344 static int hotkey_kthread(void *data)
1345 {
1346 struct tp_nvram_state s[2];
1347 u32 mask;
1348 unsigned int si, so;
1349 unsigned long t;
1350 unsigned int change_detector, must_reset;
1351
1352 mutex_lock(&hotkey_thread_mutex);
1353
1354 if (tpacpi_lifecycle == TPACPI_LIFE_EXITING)
1355 goto exit;
1356
1357 set_freezable();
1358
1359 so = 0;
1360 si = 1;
1361 t = 0;
1362
1363 /* Initial state for compares */
1364 mutex_lock(&hotkey_thread_data_mutex);
1365 change_detector = hotkey_config_change;
1366 mask = hotkey_source_mask & hotkey_mask;
1367 mutex_unlock(&hotkey_thread_data_mutex);
1368 hotkey_read_nvram(&s[so], mask);
1369
1370 while (!kthread_should_stop() && hotkey_poll_freq) {
1371 if (t == 0)
1372 t = 1000/hotkey_poll_freq;
1373 t = msleep_interruptible(t);
1374 if (unlikely(kthread_should_stop()))
1375 break;
1376 must_reset = try_to_freeze();
1377 if (t > 0 && !must_reset)
1378 continue;
1379
1380 mutex_lock(&hotkey_thread_data_mutex);
1381 if (must_reset || hotkey_config_change != change_detector) {
1382 /* forget old state on thaw or config change */
1383 si = so;
1384 t = 0;
1385 change_detector = hotkey_config_change;
1386 }
1387 mask = hotkey_source_mask & hotkey_mask;
1388 mutex_unlock(&hotkey_thread_data_mutex);
1389
1390 if (likely(mask)) {
1391 hotkey_read_nvram(&s[si], mask);
1392 if (likely(si != so)) {
1393 hotkey_compare_and_issue_event(&s[so], &s[si],
1394 mask);
1395 }
1396 }
1397
1398 so = si;
1399 si ^= 1;
1400 }
1401
1402 exit:
1403 mutex_unlock(&hotkey_thread_mutex);
1404 return 0;
1405 }
1406
1407 static void hotkey_poll_stop_sync(void)
1408 {
1409 if (tpacpi_hotkey_task) {
1410 if (frozen(tpacpi_hotkey_task) ||
1411 freezing(tpacpi_hotkey_task))
1412 thaw_process(tpacpi_hotkey_task);
1413
1414 kthread_stop(tpacpi_hotkey_task);
1415 tpacpi_hotkey_task = NULL;
1416 mutex_lock(&hotkey_thread_mutex);
1417 /* at this point, the thread did exit */
1418 mutex_unlock(&hotkey_thread_mutex);
1419 }
1420 }
1421
1422 /* call with hotkey_mutex held */
1423 static void hotkey_poll_setup(int may_warn)
1424 {
1425 if ((hotkey_source_mask & hotkey_mask) != 0 &&
1426 hotkey_poll_freq > 0 &&
1427 (tpacpi_inputdev->users > 0 || hotkey_report_mode < 2)) {
1428 if (!tpacpi_hotkey_task) {
1429 tpacpi_hotkey_task = kthread_run(hotkey_kthread,
1430 NULL,
1431 TPACPI_FILE "d");
1432 if (IS_ERR(tpacpi_hotkey_task)) {
1433 tpacpi_hotkey_task = NULL;
1434 printk(TPACPI_ERR
1435 "could not create kernel thread "
1436 "for hotkey polling\n");
1437 }
1438 }
1439 } else {
1440 hotkey_poll_stop_sync();
1441 if (may_warn &&
1442 hotkey_source_mask != 0 && hotkey_poll_freq == 0) {
1443 printk(TPACPI_NOTICE
1444 "hot keys 0x%08x require polling, "
1445 "which is currently disabled\n",
1446 hotkey_source_mask);
1447 }
1448 }
1449 }
1450
1451 static void hotkey_poll_setup_safe(int may_warn)
1452 {
1453 mutex_lock(&hotkey_mutex);
1454 hotkey_poll_setup(may_warn);
1455 mutex_unlock(&hotkey_mutex);
1456 }
1457
1458 #else /* CONFIG_THINKPAD_ACPI_HOTKEY_POLL */
1459
1460 static void hotkey_poll_setup_safe(int __unused)
1461 {
1462 }
1463
1464 #endif /* CONFIG_THINKPAD_ACPI_HOTKEY_POLL */
1465
1466 static int hotkey_inputdev_open(struct input_dev *dev)
1467 {
1468 switch (tpacpi_lifecycle) {
1469 case TPACPI_LIFE_INIT:
1470 /*
1471 * hotkey_init will call hotkey_poll_setup_safe
1472 * at the appropriate moment
1473 */
1474 return 0;
1475 case TPACPI_LIFE_EXITING:
1476 return -EBUSY;
1477 case TPACPI_LIFE_RUNNING:
1478 hotkey_poll_setup_safe(0);
1479 return 0;
1480 }
1481
1482 /* Should only happen if tpacpi_lifecycle is corrupt */
1483 BUG();
1484 return -EBUSY;
1485 }
1486
1487 static void hotkey_inputdev_close(struct input_dev *dev)
1488 {
1489 /* disable hotkey polling when possible */
1490 if (tpacpi_lifecycle == TPACPI_LIFE_RUNNING)
1491 hotkey_poll_setup_safe(0);
1492 }
1493
1494 /* sysfs hotkey enable ------------------------------------------------- */
1495 static ssize_t hotkey_enable_show(struct device *dev,
1496 struct device_attribute *attr,
1497 char *buf)
1498 {
1499 int res, status;
1500
1501 res = hotkey_status_get(&status);
1502 if (res)
1503 return res;
1504
1505 return snprintf(buf, PAGE_SIZE, "%d\n", status);
1506 }
1507
1508 static ssize_t hotkey_enable_store(struct device *dev,
1509 struct device_attribute *attr,
1510 const char *buf, size_t count)
1511 {
1512 unsigned long t;
1513 int res;
1514
1515 if (parse_strtoul(buf, 1, &t))
1516 return -EINVAL;
1517
1518 res = hotkey_status_set(t);
1519
1520 return (res) ? res : count;
1521 }
1522
1523 static struct device_attribute dev_attr_hotkey_enable =
1524 __ATTR(hotkey_enable, S_IWUSR | S_IRUGO,
1525 hotkey_enable_show, hotkey_enable_store);
1526
1527 /* sysfs hotkey mask --------------------------------------------------- */
1528 static ssize_t hotkey_mask_show(struct device *dev,
1529 struct device_attribute *attr,
1530 char *buf)
1531 {
1532 int res;
1533
1534 if (mutex_lock_interruptible(&hotkey_mutex))
1535 return -ERESTARTSYS;
1536 res = hotkey_mask_get();
1537 mutex_unlock(&hotkey_mutex);
1538
1539 return (res)?
1540 res : snprintf(buf, PAGE_SIZE, "0x%08x\n", hotkey_mask);
1541 }
1542
1543 static ssize_t hotkey_mask_store(struct device *dev,
1544 struct device_attribute *attr,
1545 const char *buf, size_t count)
1546 {
1547 unsigned long t;
1548 int res;
1549
1550 if (parse_strtoul(buf, 0xffffffffUL, &t))
1551 return -EINVAL;
1552
1553 if (mutex_lock_interruptible(&hotkey_mutex))
1554 return -ERESTARTSYS;
1555
1556 res = hotkey_mask_set(t);
1557
1558 #ifdef CONFIG_THINKPAD_ACPI_HOTKEY_POLL
1559 hotkey_poll_setup(1);
1560 #endif
1561
1562 mutex_unlock(&hotkey_mutex);
1563
1564 return (res) ? res : count;
1565 }
1566
1567 static struct device_attribute dev_attr_hotkey_mask =
1568 __ATTR(hotkey_mask, S_IWUSR | S_IRUGO,
1569 hotkey_mask_show, hotkey_mask_store);
1570
1571 /* sysfs hotkey bios_enabled ------------------------------------------- */
1572 static ssize_t hotkey_bios_enabled_show(struct device *dev,
1573 struct device_attribute *attr,
1574 char *buf)
1575 {
1576 return snprintf(buf, PAGE_SIZE, "%d\n", hotkey_orig_status);
1577 }
1578
1579 static struct device_attribute dev_attr_hotkey_bios_enabled =
1580 __ATTR(hotkey_bios_enabled, S_IRUGO, hotkey_bios_enabled_show, NULL);
1581
1582 /* sysfs hotkey bios_mask ---------------------------------------------- */
1583 static ssize_t hotkey_bios_mask_show(struct device *dev,
1584 struct device_attribute *attr,
1585 char *buf)
1586 {
1587 return snprintf(buf, PAGE_SIZE, "0x%08x\n", hotkey_orig_mask);
1588 }
1589
1590 static struct device_attribute dev_attr_hotkey_bios_mask =
1591 __ATTR(hotkey_bios_mask, S_IRUGO, hotkey_bios_mask_show, NULL);
1592
1593 /* sysfs hotkey all_mask ----------------------------------------------- */
1594 static ssize_t hotkey_all_mask_show(struct device *dev,
1595 struct device_attribute *attr,
1596 char *buf)
1597 {
1598 return snprintf(buf, PAGE_SIZE, "0x%08x\n",
1599 hotkey_all_mask | hotkey_source_mask);
1600 }
1601
1602 static struct device_attribute dev_attr_hotkey_all_mask =
1603 __ATTR(hotkey_all_mask, S_IRUGO, hotkey_all_mask_show, NULL);
1604
1605 /* sysfs hotkey recommended_mask --------------------------------------- */
1606 static ssize_t hotkey_recommended_mask_show(struct device *dev,
1607 struct device_attribute *attr,
1608 char *buf)
1609 {
1610 return snprintf(buf, PAGE_SIZE, "0x%08x\n",
1611 (hotkey_all_mask | hotkey_source_mask)
1612 & ~hotkey_reserved_mask);
1613 }
1614
1615 static struct device_attribute dev_attr_hotkey_recommended_mask =
1616 __ATTR(hotkey_recommended_mask, S_IRUGO,
1617 hotkey_recommended_mask_show, NULL);
1618
1619 #ifdef CONFIG_THINKPAD_ACPI_HOTKEY_POLL
1620
1621 /* sysfs hotkey hotkey_source_mask ------------------------------------- */
1622 static ssize_t hotkey_source_mask_show(struct device *dev,
1623 struct device_attribute *attr,
1624 char *buf)
1625 {
1626 return snprintf(buf, PAGE_SIZE, "0x%08x\n", hotkey_source_mask);
1627 }
1628
1629 static ssize_t hotkey_source_mask_store(struct device *dev,
1630 struct device_attribute *attr,
1631 const char *buf, size_t count)
1632 {
1633 unsigned long t;
1634
1635 if (parse_strtoul(buf, 0xffffffffUL, &t) ||
1636 ((t & ~TPACPI_HKEY_NVRAM_KNOWN_MASK) != 0))
1637 return -EINVAL;
1638
1639 if (mutex_lock_interruptible(&hotkey_mutex))
1640 return -ERESTARTSYS;
1641
1642 HOTKEY_CONFIG_CRITICAL_START
1643 hotkey_source_mask = t;
1644 HOTKEY_CONFIG_CRITICAL_END
1645
1646 hotkey_poll_setup(1);
1647
1648 mutex_unlock(&hotkey_mutex);
1649
1650 return count;
1651 }
1652
1653 static struct device_attribute dev_attr_hotkey_source_mask =
1654 __ATTR(hotkey_source_mask, S_IWUSR | S_IRUGO,
1655 hotkey_source_mask_show, hotkey_source_mask_store);
1656
1657 /* sysfs hotkey hotkey_poll_freq --------------------------------------- */
1658 static ssize_t hotkey_poll_freq_show(struct device *dev,
1659 struct device_attribute *attr,
1660 char *buf)
1661 {
1662 return snprintf(buf, PAGE_SIZE, "%d\n", hotkey_poll_freq);
1663 }
1664
1665 static ssize_t hotkey_poll_freq_store(struct device *dev,
1666 struct device_attribute *attr,
1667 const char *buf, size_t count)
1668 {
1669 unsigned long t;
1670
1671 if (parse_strtoul(buf, 25, &t))
1672 return -EINVAL;
1673
1674 if (mutex_lock_interruptible(&hotkey_mutex))
1675 return -ERESTARTSYS;
1676
1677 hotkey_poll_freq = t;
1678
1679 hotkey_poll_setup(1);
1680 mutex_unlock(&hotkey_mutex);
1681
1682 return count;
1683 }
1684
1685 static struct device_attribute dev_attr_hotkey_poll_freq =
1686 __ATTR(hotkey_poll_freq, S_IWUSR | S_IRUGO,
1687 hotkey_poll_freq_show, hotkey_poll_freq_store);
1688
1689 #endif /* CONFIG_THINKPAD_ACPI_HOTKEY_POLL */
1690
1691 /* sysfs hotkey radio_sw (pollable) ------------------------------------ */
1692 static ssize_t hotkey_radio_sw_show(struct device *dev,
1693 struct device_attribute *attr,
1694 char *buf)
1695 {
1696 int res, s;
1697 res = hotkey_get_wlsw(&s);
1698 if (res < 0)
1699 return res;
1700
1701 return snprintf(buf, PAGE_SIZE, "%d\n", !!s);
1702 }
1703
1704 static struct device_attribute dev_attr_hotkey_radio_sw =
1705 __ATTR(hotkey_radio_sw, S_IRUGO, hotkey_radio_sw_show, NULL);
1706
1707 static void hotkey_radio_sw_notify_change(void)
1708 {
1709 if (tp_features.hotkey_wlsw)
1710 sysfs_notify(&tpacpi_pdev->dev.kobj, NULL,
1711 "hotkey_radio_sw");
1712 }
1713
1714 /* sysfs hotkey tablet mode (pollable) --------------------------------- */
1715 static ssize_t hotkey_tablet_mode_show(struct device *dev,
1716 struct device_attribute *attr,
1717 char *buf)
1718 {
1719 int res, s;
1720 res = hotkey_get_tablet_mode(&s);
1721 if (res < 0)
1722 return res;
1723
1724 return snprintf(buf, PAGE_SIZE, "%d\n", !!s);
1725 }
1726
1727 static struct device_attribute dev_attr_hotkey_tablet_mode =
1728 __ATTR(hotkey_tablet_mode, S_IRUGO, hotkey_tablet_mode_show, NULL);
1729
1730 static void hotkey_tablet_mode_notify_change(void)
1731 {
1732 if (tp_features.hotkey_tablet)
1733 sysfs_notify(&tpacpi_pdev->dev.kobj, NULL,
1734 "hotkey_tablet_mode");
1735 }
1736
1737 /* sysfs hotkey report_mode -------------------------------------------- */
1738 static ssize_t hotkey_report_mode_show(struct device *dev,
1739 struct device_attribute *attr,
1740 char *buf)
1741 {
1742 return snprintf(buf, PAGE_SIZE, "%d\n",
1743 (hotkey_report_mode != 0) ? hotkey_report_mode : 1);
1744 }
1745
1746 static struct device_attribute dev_attr_hotkey_report_mode =
1747 __ATTR(hotkey_report_mode, S_IRUGO, hotkey_report_mode_show, NULL);
1748
1749 /* sysfs wakeup reason (pollable) -------------------------------------- */
1750 static ssize_t hotkey_wakeup_reason_show(struct device *dev,
1751 struct device_attribute *attr,
1752 char *buf)
1753 {
1754 return snprintf(buf, PAGE_SIZE, "%d\n", hotkey_wakeup_reason);
1755 }
1756
1757 static struct device_attribute dev_attr_hotkey_wakeup_reason =
1758 __ATTR(wakeup_reason, S_IRUGO, hotkey_wakeup_reason_show, NULL);
1759
1760 static void hotkey_wakeup_reason_notify_change(void)
1761 {
1762 if (tp_features.hotkey_mask)
1763 sysfs_notify(&tpacpi_pdev->dev.kobj, NULL,
1764 "wakeup_reason");
1765 }
1766
1767 /* sysfs wakeup hotunplug_complete (pollable) -------------------------- */
1768 static ssize_t hotkey_wakeup_hotunplug_complete_show(struct device *dev,
1769 struct device_attribute *attr,
1770 char *buf)
1771 {
1772 return snprintf(buf, PAGE_SIZE, "%d\n", hotkey_autosleep_ack);
1773 }
1774
1775 static struct device_attribute dev_attr_hotkey_wakeup_hotunplug_complete =
1776 __ATTR(wakeup_hotunplug_complete, S_IRUGO,
1777 hotkey_wakeup_hotunplug_complete_show, NULL);
1778
1779 static void hotkey_wakeup_hotunplug_complete_notify_change(void)
1780 {
1781 if (tp_features.hotkey_mask)
1782 sysfs_notify(&tpacpi_pdev->dev.kobj, NULL,
1783 "wakeup_hotunplug_complete");
1784 }
1785
1786 /* --------------------------------------------------------------------- */
1787
1788 static struct attribute *hotkey_attributes[] __initdata = {
1789 &dev_attr_hotkey_enable.attr,
1790 &dev_attr_hotkey_bios_enabled.attr,
1791 &dev_attr_hotkey_report_mode.attr,
1792 #ifdef CONFIG_THINKPAD_ACPI_HOTKEY_POLL
1793 &dev_attr_hotkey_mask.attr,
1794 &dev_attr_hotkey_all_mask.attr,
1795 &dev_attr_hotkey_recommended_mask.attr,
1796 &dev_attr_hotkey_source_mask.attr,
1797 &dev_attr_hotkey_poll_freq.attr,
1798 #endif
1799 };
1800
1801 static struct attribute *hotkey_mask_attributes[] __initdata = {
1802 &dev_attr_hotkey_bios_mask.attr,
1803 #ifndef CONFIG_THINKPAD_ACPI_HOTKEY_POLL
1804 &dev_attr_hotkey_mask.attr,
1805 &dev_attr_hotkey_all_mask.attr,
1806 &dev_attr_hotkey_recommended_mask.attr,
1807 #endif
1808 &dev_attr_hotkey_wakeup_reason.attr,
1809 &dev_attr_hotkey_wakeup_hotunplug_complete.attr,
1810 };
1811
1812 static int __init hotkey_init(struct ibm_init_struct *iibm)
1813 {
1814 /* Requirements for changing the default keymaps:
1815 *
1816 * 1. Many of the keys are mapped to KEY_RESERVED for very
1817 * good reasons. Do not change them unless you have deep
1818 * knowledge on the IBM and Lenovo ThinkPad firmware for
1819 * the various ThinkPad models. The driver behaves
1820 * differently for KEY_RESERVED: such keys have their
1821 * hot key mask *unset* in mask_recommended, and also
1822 * in the initial hot key mask programmed into the
1823 * firmware at driver load time, which means the firm-
1824 * ware may react very differently if you change them to
1825 * something else;
1826 *
1827 * 2. You must be subscribed to the linux-thinkpad and
1828 * ibm-acpi-devel mailing lists, and you should read the
1829 * list archives since 2007 if you want to change the
1830 * keymaps. This requirement exists so that you will
1831 * know the past history of problems with the thinkpad-
1832 * acpi driver keymaps, and also that you will be
1833 * listening to any bug reports;
1834 *
1835 * 3. Do not send thinkpad-acpi specific patches directly to
1836 * for merging, *ever*. Send them to the linux-acpi
1837 * mailinglist for comments. Merging is to be done only
1838 * through acpi-test and the ACPI maintainer.
1839 *
1840 * If the above is too much to ask, don't change the keymap.
1841 * Ask the thinkpad-acpi maintainer to do it, instead.
1842 */
1843 static u16 ibm_keycode_map[] __initdata = {
1844 /* Scan Codes 0x00 to 0x0B: ACPI HKEY FN+F1..F12 */
1845 KEY_FN_F1, KEY_FN_F2, KEY_COFFEE, KEY_SLEEP,
1846 KEY_WLAN, KEY_FN_F6, KEY_SWITCHVIDEOMODE, KEY_FN_F8,
1847 KEY_FN_F9, KEY_FN_F10, KEY_FN_F11, KEY_SUSPEND,
1848
1849 /* Scan codes 0x0C to 0x1F: Other ACPI HKEY hot keys */
1850 KEY_UNKNOWN, /* 0x0C: FN+BACKSPACE */
1851 KEY_UNKNOWN, /* 0x0D: FN+INSERT */
1852 KEY_UNKNOWN, /* 0x0E: FN+DELETE */
1853
1854 /* brightness: firmware always reacts to them, unless
1855 * X.org did some tricks in the radeon BIOS scratch
1856 * registers of *some* models */
1857 KEY_RESERVED, /* 0x0F: FN+HOME (brightness up) */
1858 KEY_RESERVED, /* 0x10: FN+END (brightness down) */
1859
1860 /* Thinklight: firmware always react to it */
1861 KEY_RESERVED, /* 0x11: FN+PGUP (thinklight toggle) */
1862
1863 KEY_UNKNOWN, /* 0x12: FN+PGDOWN */
1864 KEY_ZOOM, /* 0x13: FN+SPACE (zoom) */
1865
1866 /* Volume: firmware always react to it and reprograms
1867 * the built-in *extra* mixer. Never map it to control
1868 * another mixer by default. */
1869 KEY_RESERVED, /* 0x14: VOLUME UP */
1870 KEY_RESERVED, /* 0x15: VOLUME DOWN */
1871 KEY_RESERVED, /* 0x16: MUTE */
1872
1873 KEY_VENDOR, /* 0x17: Thinkpad/AccessIBM/Lenovo */
1874
1875 /* (assignments unknown, please report if found) */
1876 KEY_UNKNOWN, KEY_UNKNOWN, KEY_UNKNOWN, KEY_UNKNOWN,
1877 KEY_UNKNOWN, KEY_UNKNOWN, KEY_UNKNOWN, KEY_UNKNOWN,
1878 };
1879 static u16 lenovo_keycode_map[] __initdata = {
1880 /* Scan Codes 0x00 to 0x0B: ACPI HKEY FN+F1..F12 */
1881 KEY_FN_F1, KEY_COFFEE, KEY_BATTERY, KEY_SLEEP,
1882 KEY_WLAN, KEY_FN_F6, KEY_SWITCHVIDEOMODE, KEY_FN_F8,
1883 KEY_FN_F9, KEY_FN_F10, KEY_FN_F11, KEY_SUSPEND,
1884
1885 /* Scan codes 0x0C to 0x1F: Other ACPI HKEY hot keys */
1886 KEY_UNKNOWN, /* 0x0C: FN+BACKSPACE */
1887 KEY_UNKNOWN, /* 0x0D: FN+INSERT */
1888 KEY_UNKNOWN, /* 0x0E: FN+DELETE */
1889
1890 KEY_RESERVED, /* 0x0F: FN+HOME (brightness up) */
1891 KEY_RESERVED, /* 0x10: FN+END (brightness down) */
1892
1893 KEY_RESERVED, /* 0x11: FN+PGUP (thinklight toggle) */
1894
1895 KEY_UNKNOWN, /* 0x12: FN+PGDOWN */
1896 KEY_ZOOM, /* 0x13: FN+SPACE (zoom) */
1897
1898 /* Volume: z60/z61, T60 (BIOS version?): firmware always
1899 * react to it and reprograms the built-in *extra* mixer.
1900 * Never map it to control another mixer by default.
1901 *
1902 * T60?, T61, R60?, R61: firmware and EC tries to send
1903 * these over the regular keyboard, so these are no-ops,
1904 * but there are still weird bugs re. MUTE, so do not
1905 * change unless you get test reports from all Lenovo
1906 * models. May cause the BIOS to interfere with the
1907 * HDA mixer.
1908 */
1909 KEY_RESERVED, /* 0x14: VOLUME UP */
1910 KEY_RESERVED, /* 0x15: VOLUME DOWN */
1911 KEY_RESERVED, /* 0x16: MUTE */
1912
1913 KEY_VENDOR, /* 0x17: Thinkpad/AccessIBM/Lenovo */
1914
1915 /* (assignments unknown, please report if found) */
1916 KEY_UNKNOWN, KEY_UNKNOWN, KEY_UNKNOWN, KEY_UNKNOWN,
1917 KEY_UNKNOWN, KEY_UNKNOWN, KEY_UNKNOWN, KEY_UNKNOWN,
1918 };
1919
1920 #define TPACPI_HOTKEY_MAP_LEN ARRAY_SIZE(ibm_keycode_map)
1921 #define TPACPI_HOTKEY_MAP_SIZE sizeof(ibm_keycode_map)
1922 #define TPACPI_HOTKEY_MAP_TYPESIZE sizeof(ibm_keycode_map[0])
1923
1924 int res, i;
1925 int status;
1926 int hkeyv;
1927
1928 vdbg_printk(TPACPI_DBG_INIT, "initializing hotkey subdriver\n");
1929
1930 BUG_ON(!tpacpi_inputdev);
1931 BUG_ON(tpacpi_inputdev->open != NULL ||
1932 tpacpi_inputdev->close != NULL);
1933
1934 TPACPI_ACPIHANDLE_INIT(hkey);
1935 mutex_init(&hotkey_mutex);
1936
1937 #ifdef CONFIG_THINKPAD_ACPI_HOTKEY_POLL
1938 mutex_init(&hotkey_thread_mutex);
1939 mutex_init(&hotkey_thread_data_mutex);
1940 #endif
1941
1942 /* hotkey not supported on 570 */
1943 tp_features.hotkey = hkey_handle != NULL;
1944
1945 vdbg_printk(TPACPI_DBG_INIT, "hotkeys are %s\n",
1946 str_supported(tp_features.hotkey));
1947
1948 if (tp_features.hotkey) {
1949 hotkey_dev_attributes = create_attr_set(13, NULL);
1950 if (!hotkey_dev_attributes)
1951 return -ENOMEM;
1952 res = add_many_to_attr_set(hotkey_dev_attributes,
1953 hotkey_attributes,
1954 ARRAY_SIZE(hotkey_attributes));
1955 if (res)
1956 return res;
1957
1958 /* mask not supported on 570, 600e/x, 770e, 770x, A21e, A2xm/p,
1959 A30, R30, R31, T20-22, X20-21, X22-24. Detected by checking
1960 for HKEY interface version 0x100 */
1961 if (acpi_evalf(hkey_handle, &hkeyv, "MHKV", "qd")) {
1962 if ((hkeyv >> 8) != 1) {
1963 printk(TPACPI_ERR "unknown version of the "
1964 "HKEY interface: 0x%x\n", hkeyv);
1965 printk(TPACPI_ERR "please report this to %s\n",
1966 TPACPI_MAIL);
1967 } else {
1968 /*
1969 * MHKV 0x100 in A31, R40, R40e,
1970 * T4x, X31, and later
1971 */
1972 tp_features.hotkey_mask = 1;
1973 }
1974 }
1975
1976 vdbg_printk(TPACPI_DBG_INIT, "hotkey masks are %s\n",
1977 str_supported(tp_features.hotkey_mask));
1978
1979 if (tp_features.hotkey_mask) {
1980 if (!acpi_evalf(hkey_handle, &hotkey_all_mask,
1981 "MHKA", "qd")) {
1982 printk(TPACPI_ERR
1983 "missing MHKA handler, "
1984 "please report this to %s\n",
1985 TPACPI_MAIL);
1986 /* FN+F12, FN+F4, FN+F3 */
1987 hotkey_all_mask = 0x080cU;
1988 }
1989 }
1990
1991 /* hotkey_source_mask *must* be zero for
1992 * the first hotkey_mask_get */
1993 res = hotkey_status_get(&hotkey_orig_status);
1994 if (!res && tp_features.hotkey_mask) {
1995 res = hotkey_mask_get();
1996 hotkey_orig_mask = hotkey_mask;
1997 if (!res) {
1998 res = add_many_to_attr_set(
1999 hotkey_dev_attributes,
2000 hotkey_mask_attributes,
2001 ARRAY_SIZE(hotkey_mask_attributes));
2002 }
2003 }
2004
2005 #ifdef CONFIG_THINKPAD_ACPI_HOTKEY_POLL
2006 if (tp_features.hotkey_mask) {
2007 hotkey_source_mask = TPACPI_HKEY_NVRAM_GOOD_MASK
2008 & ~hotkey_all_mask;
2009 } else {
2010 hotkey_source_mask = TPACPI_HKEY_NVRAM_GOOD_MASK;
2011 }
2012
2013 vdbg_printk(TPACPI_DBG_INIT,
2014 "hotkey source mask 0x%08x, polling freq %d\n",
2015 hotkey_source_mask, hotkey_poll_freq);
2016 #endif
2017
2018 /* Not all thinkpads have a hardware radio switch */
2019 if (!res && acpi_evalf(hkey_handle, &status, "WLSW", "qd")) {
2020 tp_features.hotkey_wlsw = 1;
2021 printk(TPACPI_INFO
2022 "radio switch found; radios are %s\n",
2023 enabled(status, 0));
2024 res = add_to_attr_set(hotkey_dev_attributes,
2025 &dev_attr_hotkey_radio_sw.attr);
2026 }
2027
2028 /* For X41t, X60t, X61t Tablets... */
2029 if (!res && acpi_evalf(hkey_handle, &status, "MHKG", "qd")) {
2030 tp_features.hotkey_tablet = 1;
2031 printk(TPACPI_INFO
2032 "possible tablet mode switch found; "
2033 "ThinkPad in %s mode\n",
2034 (status & TP_HOTKEY_TABLET_MASK)?
2035 "tablet" : "laptop");
2036 res = add_to_attr_set(hotkey_dev_attributes,
2037 &dev_attr_hotkey_tablet_mode.attr);
2038 }
2039
2040 if (!res)
2041 res = register_attr_set_with_sysfs(
2042 hotkey_dev_attributes,
2043 &tpacpi_pdev->dev.kobj);
2044 if (res)
2045 return res;
2046
2047 /* Set up key map */
2048
2049 hotkey_keycode_map = kmalloc(TPACPI_HOTKEY_MAP_SIZE,
2050 GFP_KERNEL);
2051 if (!hotkey_keycode_map) {
2052 printk(TPACPI_ERR
2053 "failed to allocate memory for key map\n");
2054 return -ENOMEM;
2055 }
2056
2057 if (thinkpad_id.vendor == PCI_VENDOR_ID_LENOVO) {
2058 dbg_printk(TPACPI_DBG_INIT,
2059 "using Lenovo default hot key map\n");
2060 memcpy(hotkey_keycode_map, &lenovo_keycode_map,
2061 TPACPI_HOTKEY_MAP_SIZE);
2062 } else {
2063 dbg_printk(TPACPI_DBG_INIT,
2064 "using IBM default hot key map\n");
2065 memcpy(hotkey_keycode_map, &ibm_keycode_map,
2066 TPACPI_HOTKEY_MAP_SIZE);
2067 }
2068
2069 set_bit(EV_KEY, tpacpi_inputdev->evbit);
2070 set_bit(EV_MSC, tpacpi_inputdev->evbit);
2071 set_bit(MSC_SCAN, tpacpi_inputdev->mscbit);
2072 tpacpi_inputdev->keycodesize = TPACPI_HOTKEY_MAP_TYPESIZE;
2073 tpacpi_inputdev->keycodemax = TPACPI_HOTKEY_MAP_LEN;
2074 tpacpi_inputdev->keycode = hotkey_keycode_map;
2075 for (i = 0; i < TPACPI_HOTKEY_MAP_LEN; i++) {
2076 if (hotkey_keycode_map[i] != KEY_RESERVED) {
2077 set_bit(hotkey_keycode_map[i],
2078 tpacpi_inputdev->keybit);
2079 } else {
2080 if (i < sizeof(hotkey_reserved_mask)*8)
2081 hotkey_reserved_mask |= 1 << i;
2082 }
2083 }
2084
2085 if (tp_features.hotkey_wlsw) {
2086 set_bit(EV_SW, tpacpi_inputdev->evbit);
2087 set_bit(SW_RADIO, tpacpi_inputdev->swbit);
2088 }
2089 if (tp_features.hotkey_tablet) {
2090 set_bit(EV_SW, tpacpi_inputdev->evbit);
2091 set_bit(SW_TABLET_MODE, tpacpi_inputdev->swbit);
2092 }
2093
2094 dbg_printk(TPACPI_DBG_INIT,
2095 "enabling hot key handling\n");
2096 res = hotkey_status_set(1);
2097 if (res)
2098 return res;
2099 res = hotkey_mask_set(((hotkey_all_mask | hotkey_source_mask)
2100 & ~hotkey_reserved_mask)
2101 | hotkey_orig_mask);
2102 if (res < 0 && res != -ENXIO)
2103 return res;
2104
2105 dbg_printk(TPACPI_DBG_INIT,
2106 "legacy hot key reporting over procfs %s\n",
2107 (hotkey_report_mode < 2) ?
2108 "enabled" : "disabled");
2109
2110 tpacpi_inputdev->open = &hotkey_inputdev_open;
2111 tpacpi_inputdev->close = &hotkey_inputdev_close;
2112
2113 hotkey_poll_setup_safe(1);
2114 tpacpi_input_send_radiosw();
2115 tpacpi_input_send_tabletsw();
2116 }
2117
2118 return (tp_features.hotkey)? 0 : 1;
2119 }
2120
2121 static void hotkey_exit(void)
2122 {
2123 #ifdef CONFIG_THINKPAD_ACPI_HOTKEY_POLL
2124 hotkey_poll_stop_sync();
2125 #endif
2126
2127 if (tp_features.hotkey) {
2128 dbg_printk(TPACPI_DBG_EXIT,
2129 "restoring original hot key mask\n");
2130 /* no short-circuit boolean operator below! */
2131 if ((hotkey_mask_set(hotkey_orig_mask) |
2132 hotkey_status_set(hotkey_orig_status)) != 0)
2133 printk(TPACPI_ERR
2134 "failed to restore hot key mask "
2135 "to BIOS defaults\n");
2136 }
2137
2138 if (hotkey_dev_attributes) {
2139 delete_attr_set(hotkey_dev_attributes, &tpacpi_pdev->dev.kobj);
2140 hotkey_dev_attributes = NULL;
2141 }
2142 }
2143
2144 static void hotkey_notify(struct ibm_struct *ibm, u32 event)
2145 {
2146 u32 hkey;
2147 unsigned int scancode;
2148 int send_acpi_ev;
2149 int ignore_acpi_ev;
2150 int unk_ev;
2151
2152 if (event != 0x80) {
2153 printk(TPACPI_ERR
2154 "unknown HKEY notification event %d\n", event);
2155 /* forward it to userspace, maybe it knows how to handle it */
2156 acpi_bus_generate_netlink_event(
2157 ibm->acpi->device->pnp.device_class,
2158 ibm->acpi->device->dev.bus_id,
2159 event, 0);
2160 return;
2161 }
2162
2163 while (1) {
2164 if (!acpi_evalf(hkey_handle, &hkey, "MHKP", "d")) {
2165 printk(TPACPI_ERR "failed to retrieve HKEY event\n");
2166 return;
2167 }
2168
2169 if (hkey == 0) {
2170 /* queue empty */
2171 return;
2172 }
2173
2174 send_acpi_ev = 1;
2175 ignore_acpi_ev = 0;
2176 unk_ev = 0;
2177
2178 switch (hkey >> 12) {
2179 case 1:
2180 /* 0x1000-0x1FFF: key presses */
2181 scancode = hkey & 0xfff;
2182 if (scancode > 0 && scancode < 0x21) {
2183 scancode--;
2184 if (!(hotkey_source_mask & (1 << scancode))) {
2185 tpacpi_input_send_key(scancode);
2186 send_acpi_ev = 0;
2187 } else {
2188 ignore_acpi_ev = 1;
2189 }
2190 } else {
2191 unk_ev = 1;
2192 }
2193 break;
2194 case 2:
2195 /* Wakeup reason */
2196 switch (hkey) {
2197 case 0x2304: /* suspend, undock */
2198 case 0x2404: /* hibernation, undock */
2199 hotkey_wakeup_reason = TP_ACPI_WAKEUP_UNDOCK;
2200 ignore_acpi_ev = 1;
2201 break;
2202 case 0x2305: /* suspend, bay eject */
2203 case 0x2405: /* hibernation, bay eject */
2204 hotkey_wakeup_reason = TP_ACPI_WAKEUP_BAYEJ;
2205 ignore_acpi_ev = 1;
2206 break;
2207 default:
2208 unk_ev = 1;
2209 }
2210 if (hotkey_wakeup_reason != TP_ACPI_WAKEUP_NONE) {
2211 printk(TPACPI_INFO
2212 "woke up due to a hot-unplug "
2213 "request...\n");
2214 hotkey_wakeup_reason_notify_change();
2215 }
2216 break;
2217 case 3:
2218 /* bay-related wakeups */
2219 if (hkey == 0x3003) {
2220 hotkey_autosleep_ack = 1;
2221 printk(TPACPI_INFO
2222 "bay ejected\n");
2223 hotkey_wakeup_hotunplug_complete_notify_change();
2224 } else {
2225 unk_ev = 1;
2226 }
2227 break;
2228 case 4:
2229 /* dock-related wakeups */
2230 if (hkey == 0x4003) {
2231 hotkey_autosleep_ack = 1;
2232 printk(TPACPI_INFO
2233 "undocked\n");
2234 hotkey_wakeup_hotunplug_complete_notify_change();
2235 } else {
2236 unk_ev = 1;
2237 }
2238 break;
2239 case 5:
2240 /* 0x5000-0x5FFF: human interface helpers */
2241 switch (hkey) {
2242 case 0x5010: /* Lenovo new BIOS: brightness changed */
2243 case 0x500b: /* X61t: tablet pen inserted into bay */
2244 case 0x500c: /* X61t: tablet pen removed from bay */
2245 break;
2246 case 0x5009: /* X41t-X61t: swivel up (tablet mode) */
2247 case 0x500a: /* X41t-X61t: swivel down (normal mode) */
2248 tpacpi_input_send_tabletsw();
2249 hotkey_tablet_mode_notify_change();
2250 send_acpi_ev = 0;
2251 break;
2252 case 0x5001:
2253 case 0x5002:
2254 /* LID switch events. Do not propagate */
2255 ignore_acpi_ev = 1;
2256 break;
2257 default:
2258 unk_ev = 1;
2259 }
2260 break;
2261 case 7:
2262 /* 0x7000-0x7FFF: misc */
2263 if (tp_features.hotkey_wlsw && hkey == 0x7000) {
2264 tpacpi_input_send_radiosw();
2265 hotkey_radio_sw_notify_change();
2266 send_acpi_ev = 0;
2267 break;
2268 }
2269 /* fallthrough to default */
2270 default:
2271 unk_ev = 1;
2272 }
2273 if (unk_ev) {
2274 printk(TPACPI_NOTICE
2275 "unhandled HKEY event 0x%04x\n", hkey);
2276 }
2277
2278 /* Legacy events */
2279 if (!ignore_acpi_ev &&
2280 (send_acpi_ev || hotkey_report_mode < 2)) {
2281 acpi_bus_generate_proc_event(ibm->acpi->device,
2282 event, hkey);
2283 }
2284
2285 /* netlink events */
2286 if (!ignore_acpi_ev && send_acpi_ev) {
2287 acpi_bus_generate_netlink_event(
2288 ibm->acpi->device->pnp.device_class,
2289 ibm->acpi->device->dev.bus_id,
2290 event, hkey);
2291 }
2292 }
2293 }
2294
2295 static void hotkey_suspend(pm_message_t state)
2296 {
2297 /* Do these on suspend, we get the events on early resume! */
2298 hotkey_wakeup_reason = TP_ACPI_WAKEUP_NONE;
2299 hotkey_autosleep_ack = 0;
2300 }
2301
2302 static void hotkey_resume(void)
2303 {
2304 if (hotkey_mask_get())
2305 printk(TPACPI_ERR
2306 "error while trying to read hot key mask "
2307 "from firmware\n");
2308 tpacpi_input_send_radiosw();
2309 hotkey_radio_sw_notify_change();
2310 hotkey_tablet_mode_notify_change();
2311 hotkey_wakeup_reason_notify_change();
2312 hotkey_wakeup_hotunplug_complete_notify_change();
2313 hotkey_poll_setup_safe(0);
2314 }
2315
2316 /* procfs -------------------------------------------------------------- */
2317 static int hotkey_read(char *p)
2318 {
2319 int res, status;
2320 int len = 0;
2321
2322 if (!tp_features.hotkey) {
2323 len += sprintf(p + len, "status:\t\tnot supported\n");
2324 return len;
2325 }
2326
2327 if (mutex_lock_interruptible(&hotkey_mutex))
2328 return -ERESTARTSYS;
2329 res = hotkey_status_get(&status);
2330 if (!res)
2331 res = hotkey_mask_get();
2332 mutex_unlock(&hotkey_mutex);
2333 if (res)
2334 return res;
2335
2336 len += sprintf(p + len, "status:\t\t%s\n", enabled(status, 0));
2337 if (tp_features.hotkey_mask) {
2338 len += sprintf(p + len, "mask:\t\t0x%08x\n", hotkey_mask);
2339 len += sprintf(p + len,
2340 "commands:\tenable, disable, reset, <mask>\n");
2341 } else {
2342 len += sprintf(p + len, "mask:\t\tnot supported\n");
2343 len += sprintf(p + len, "commands:\tenable, disable, reset\n");
2344 }
2345
2346 return len;
2347 }
2348
2349 static int hotkey_write(char *buf)
2350 {
2351 int res, status;
2352 u32 mask;
2353 char *cmd;
2354
2355 if (!tp_features.hotkey)
2356 return -ENODEV;
2357
2358 if (mutex_lock_interruptible(&hotkey_mutex))
2359 return -ERESTARTSYS;
2360
2361 status = -1;
2362 mask = hotkey_mask;
2363
2364 res = 0;
2365 while ((cmd = next_cmd(&buf))) {
2366 if (strlencmp(cmd, "enable") == 0) {
2367 status = 1;
2368 } else if (strlencmp(cmd, "disable") == 0) {
2369 status = 0;
2370 } else if (strlencmp(cmd, "reset") == 0) {
2371 status = hotkey_orig_status;
2372 mask = hotkey_orig_mask;
2373 } else if (sscanf(cmd, "0x%x", &mask) == 1) {
2374 /* mask set */
2375 } else if (sscanf(cmd, "%x", &mask) == 1) {
2376 /* mask set */
2377 } else {
2378 res = -EINVAL;
2379 goto errexit;
2380 }
2381 }
2382 if (status != -1)
2383 res = hotkey_status_set(status);
2384
2385 if (!res && mask != hotkey_mask)
2386 res = hotkey_mask_set(mask);
2387
2388 errexit:
2389 mutex_unlock(&hotkey_mutex);
2390 return res;
2391 }
2392
2393 static const struct acpi_device_id ibm_htk_device_ids[] = {
2394 {TPACPI_ACPI_HKEY_HID, 0},
2395 {"", 0},
2396 };
2397
2398 static struct tp_acpi_drv_struct ibm_hotkey_acpidriver = {
2399 .hid = ibm_htk_device_ids,
2400 .notify = hotkey_notify,
2401 .handle = &hkey_handle,
2402 .type = ACPI_DEVICE_NOTIFY,
2403 };
2404
2405 static struct ibm_struct hotkey_driver_data = {
2406 .name = "hotkey",
2407 .read = hotkey_read,
2408 .write = hotkey_write,
2409 .exit = hotkey_exit,
2410 .resume = hotkey_resume,
2411 .suspend = hotkey_suspend,
2412 .acpi = &ibm_hotkey_acpidriver,
2413 };
2414
2415 /*************************************************************************
2416 * Bluetooth subdriver
2417 */
2418
2419 enum {
2420 /* ACPI GBDC/SBDC bits */
2421 TP_ACPI_BLUETOOTH_HWPRESENT = 0x01, /* Bluetooth hw available */
2422 TP_ACPI_BLUETOOTH_RADIOSSW = 0x02, /* Bluetooth radio enabled */
2423 TP_ACPI_BLUETOOTH_UNK = 0x04, /* unknown function */
2424 };
2425
2426 static int bluetooth_get_radiosw(void);
2427 static int bluetooth_set_radiosw(int radio_on);
2428
2429 /* sysfs bluetooth enable ---------------------------------------------- */
2430 static ssize_t bluetooth_enable_show(struct device *dev,
2431 struct device_attribute *attr,
2432 char *buf)
2433 {
2434 int status;
2435
2436 status = bluetooth_get_radiosw();
2437 if (status < 0)
2438 return status;
2439
2440 return snprintf(buf, PAGE_SIZE, "%d\n", status ? 1 : 0);
2441 }
2442
2443 static ssize_t bluetooth_enable_store(struct device *dev,
2444 struct device_attribute *attr,
2445 const char *buf, size_t count)
2446 {
2447 unsigned long t;
2448 int res;
2449
2450 if (parse_strtoul(buf, 1, &t))
2451 return -EINVAL;
2452
2453 res = bluetooth_set_radiosw(t);
2454
2455 return (res) ? res : count;
2456 }
2457
2458 static struct device_attribute dev_attr_bluetooth_enable =
2459 __ATTR(bluetooth_enable, S_IWUSR | S_IRUGO,
2460 bluetooth_enable_show, bluetooth_enable_store);
2461
2462 /* --------------------------------------------------------------------- */
2463
2464 static struct attribute *bluetooth_attributes[] = {
2465 &dev_attr_bluetooth_enable.attr,
2466 NULL
2467 };
2468
2469 static const struct attribute_group bluetooth_attr_group = {
2470 .attrs = bluetooth_attributes,
2471 };
2472
2473 static int __init bluetooth_init(struct ibm_init_struct *iibm)
2474 {
2475 int res;
2476 int status = 0;
2477
2478 vdbg_printk(TPACPI_DBG_INIT, "initializing bluetooth subdriver\n");
2479
2480 TPACPI_ACPIHANDLE_INIT(hkey);
2481
2482 /* bluetooth not supported on 570, 600e/x, 770e, 770x, A21e, A2xm/p,
2483 G4x, R30, R31, R40e, R50e, T20-22, X20-21 */
2484 tp_features.bluetooth = hkey_handle &&
2485 acpi_evalf(hkey_handle, &status, "GBDC", "qd");
2486
2487 vdbg_printk(TPACPI_DBG_INIT, "bluetooth is %s, status 0x%02x\n",
2488 str_supported(tp_features.bluetooth),
2489 status);
2490
2491 if (tp_features.bluetooth) {
2492 if (!(status & TP_ACPI_BLUETOOTH_HWPRESENT)) {
2493 /* no bluetooth hardware present in system */
2494 tp_features.bluetooth = 0;
2495 dbg_printk(TPACPI_DBG_INIT,
2496 "bluetooth hardware not installed\n");
2497 } else {
2498 res = sysfs_create_group(&tpacpi_pdev->dev.kobj,
2499 &bluetooth_attr_group);
2500 if (res)
2501 return res;
2502 }
2503 }
2504
2505 return (tp_features.bluetooth)? 0 : 1;
2506 }
2507
2508 static void bluetooth_exit(void)
2509 {
2510 sysfs_remove_group(&tpacpi_pdev->dev.kobj,
2511 &bluetooth_attr_group);
2512 }
2513
2514 static int bluetooth_get_radiosw(void)
2515 {
2516 int status;
2517
2518 if (!tp_features.bluetooth)
2519 return -ENODEV;
2520
2521 if (!acpi_evalf(hkey_handle, &status, "GBDC", "d"))
2522 return -EIO;
2523
2524 return ((status & TP_ACPI_BLUETOOTH_RADIOSSW) != 0);
2525 }
2526
2527 static int bluetooth_set_radiosw(int radio_on)
2528 {
2529 int status;
2530
2531 if (!tp_features.bluetooth)
2532 return -ENODEV;
2533
2534 if (!acpi_evalf(hkey_handle, &status, "GBDC", "d"))
2535 return -EIO;
2536 if (radio_on)
2537 status |= TP_ACPI_BLUETOOTH_RADIOSSW;
2538 else
2539 status &= ~TP_ACPI_BLUETOOTH_RADIOSSW;
2540 if (!acpi_evalf(hkey_handle, NULL, "SBDC", "vd", status))
2541 return -EIO;
2542
2543 return 0;
2544 }
2545
2546 /* procfs -------------------------------------------------------------- */
2547 static int bluetooth_read(char *p)
2548 {
2549 int len = 0;
2550 int status = bluetooth_get_radiosw();
2551
2552 if (!tp_features.bluetooth)
2553 len += sprintf(p + len, "status:\t\tnot supported\n");
2554 else {
2555 len += sprintf(p + len, "status:\t\t%s\n",
2556 (status)? "enabled" : "disabled");
2557 len += sprintf(p + len, "commands:\tenable, disable\n");
2558 }
2559
2560 return len;
2561 }
2562
2563 static int bluetooth_write(char *buf)
2564 {
2565 char *cmd;
2566
2567 if (!tp_features.bluetooth)
2568 return -ENODEV;
2569
2570 while ((cmd = next_cmd(&buf))) {
2571 if (strlencmp(cmd, "enable") == 0) {
2572 bluetooth_set_radiosw(1);
2573 } else if (strlencmp(cmd, "disable") == 0) {
2574 bluetooth_set_radiosw(0);
2575 } else
2576 return -EINVAL;
2577 }
2578
2579 return 0;
2580 }
2581
2582 static struct ibm_struct bluetooth_driver_data = {
2583 .name = "bluetooth",
2584 .read = bluetooth_read,
2585 .write = bluetooth_write,
2586 .exit = bluetooth_exit,
2587 };
2588
2589 /*************************************************************************
2590 * Wan subdriver
2591 */
2592
2593 enum {
2594 /* ACPI GWAN/SWAN bits */
2595 TP_ACPI_WANCARD_HWPRESENT = 0x01, /* Wan hw available */
2596 TP_ACPI_WANCARD_RADIOSSW = 0x02, /* Wan radio enabled */
2597 TP_ACPI_WANCARD_UNK = 0x04, /* unknown function */
2598 };
2599
2600 static int wan_get_radiosw(void);
2601 static int wan_set_radiosw(int radio_on);
2602
2603 /* sysfs wan enable ---------------------------------------------------- */
2604 static ssize_t wan_enable_show(struct device *dev,
2605 struct device_attribute *attr,
2606 char *buf)
2607 {
2608 int status;
2609
2610 status = wan_get_radiosw();
2611 if (status < 0)
2612 return status;
2613
2614 return snprintf(buf, PAGE_SIZE, "%d\n", status ? 1 : 0);
2615 }
2616
2617 static ssize_t wan_enable_store(struct device *dev,
2618 struct device_attribute *attr,
2619 const char *buf, size_t count)
2620 {
2621 unsigned long t;
2622 int res;
2623
2624 if (parse_strtoul(buf, 1, &t))
2625 return -EINVAL;
2626
2627 res = wan_set_radiosw(t);
2628
2629 return (res) ? res : count;
2630 }
2631
2632 static struct device_attribute dev_attr_wan_enable =
2633 __ATTR(wwan_enable, S_IWUSR | S_IRUGO,
2634 wan_enable_show, wan_enable_store);
2635
2636 /* --------------------------------------------------------------------- */
2637
2638 static struct attribute *wan_attributes[] = {
2639 &dev_attr_wan_enable.attr,
2640 NULL
2641 };
2642
2643 static const struct attribute_group wan_attr_group = {
2644 .attrs = wan_attributes,
2645 };
2646
2647 static int __init wan_init(struct ibm_init_struct *iibm)
2648 {
2649 int res;
2650 int status = 0;
2651
2652 vdbg_printk(TPACPI_DBG_INIT, "initializing wan subdriver\n");
2653
2654 TPACPI_ACPIHANDLE_INIT(hkey);
2655
2656 tp_features.wan = hkey_handle &&
2657 acpi_evalf(hkey_handle, &status, "GWAN", "qd");
2658
2659 vdbg_printk(TPACPI_DBG_INIT, "wan is %s, status 0x%02x\n",
2660 str_supported(tp_features.wan),
2661 status);
2662
2663 if (tp_features.wan) {
2664 if (!(status & TP_ACPI_WANCARD_HWPRESENT)) {
2665 /* no wan hardware present in system */
2666 tp_features.wan = 0;
2667 dbg_printk(TPACPI_DBG_INIT,
2668 "wan hardware not installed\n");
2669 } else {
2670 res = sysfs_create_group(&tpacpi_pdev->dev.kobj,
2671 &wan_attr_group);
2672 if (res)
2673 return res;
2674 }
2675 }
2676
2677 return (tp_features.wan)? 0 : 1;
2678 }
2679
2680 static void wan_exit(void)
2681 {
2682 sysfs_remove_group(&tpacpi_pdev->dev.kobj,
2683 &wan_attr_group);
2684 }
2685
2686 static int wan_get_radiosw(void)
2687 {
2688 int status;
2689
2690 if (!tp_features.wan)
2691 return -ENODEV;
2692
2693 if (!acpi_evalf(hkey_handle, &status, "GWAN", "d"))
2694 return -EIO;
2695
2696 return ((status & TP_ACPI_WANCARD_RADIOSSW) != 0);
2697 }
2698
2699 static int wan_set_radiosw(int radio_on)
2700 {
2701 int status;
2702
2703 if (!tp_features.wan)
2704 return -ENODEV;
2705
2706 if (!acpi_evalf(hkey_handle, &status, "GWAN", "d"))
2707 return -EIO;
2708 if (radio_on)
2709 status |= TP_ACPI_WANCARD_RADIOSSW;
2710 else
2711 status &= ~TP_ACPI_WANCARD_RADIOSSW;
2712 if (!acpi_evalf(hkey_handle, NULL, "SWAN", "vd", status))
2713 return -EIO;
2714
2715 return 0;
2716 }
2717
2718 /* procfs -------------------------------------------------------------- */
2719 static int wan_read(char *p)
2720 {
2721 int len = 0;
2722 int status = wan_get_radiosw();
2723
2724 if (!tp_features.wan)
2725 len += sprintf(p + len, "status:\t\tnot supported\n");
2726 else {
2727 len += sprintf(p + len, "status:\t\t%s\n",
2728 (status)? "enabled" : "disabled");
2729 len += sprintf(p + len, "commands:\tenable, disable\n");
2730 }
2731
2732 return len;
2733 }
2734
2735 static int wan_write(char *buf)
2736 {
2737 char *cmd;
2738
2739 if (!tp_features.wan)
2740 return -ENODEV;
2741
2742 while ((cmd = next_cmd(&buf))) {
2743 if (strlencmp(cmd, "enable") == 0) {
2744 wan_set_radiosw(1);
2745 } else if (strlencmp(cmd, "disable") == 0) {
2746 wan_set_radiosw(0);
2747 } else
2748 return -EINVAL;
2749 }
2750
2751 return 0;
2752 }
2753
2754 static struct ibm_struct wan_driver_data = {
2755 .name = "wan",
2756 .read = wan_read,
2757 .write = wan_write,
2758 .exit = wan_exit,
2759 .flags.experimental = 1,
2760 };
2761
2762 /*************************************************************************
2763 * Video subdriver
2764 */
2765
2766 #ifdef CONFIG_THINKPAD_ACPI_VIDEO
2767
2768 enum video_access_mode {
2769 TPACPI_VIDEO_NONE = 0,
2770 TPACPI_VIDEO_570, /* 570 */
2771 TPACPI_VIDEO_770, /* 600e/x, 770e, 770x */
2772 TPACPI_VIDEO_NEW, /* all others */
2773 };
2774
2775 enum { /* video status flags, based on VIDEO_570 */
2776 TP_ACPI_VIDEO_S_LCD = 0x01, /* LCD output enabled */
2777 TP_ACPI_VIDEO_S_CRT = 0x02, /* CRT output enabled */
2778 TP_ACPI_VIDEO_S_DVI = 0x08, /* DVI output enabled */
2779 };
2780
2781 enum { /* TPACPI_VIDEO_570 constants */
2782 TP_ACPI_VIDEO_570_PHSCMD = 0x87, /* unknown magic constant :( */
2783 TP_ACPI_VIDEO_570_PHSMASK = 0x03, /* PHS bits that map to
2784 * video_status_flags */
2785 TP_ACPI_VIDEO_570_PHS2CMD = 0x8b, /* unknown magic constant :( */
2786 TP_ACPI_VIDEO_570_PHS2SET = 0x80, /* unknown magic constant :( */
2787 };
2788
2789 static enum video_access_mode video_supported;
2790 static int video_orig_autosw;
2791
2792 static int video_autosw_get(void);
2793 static int video_autosw_set(int enable);
2794
2795 TPACPI_HANDLE(vid2, root, "\\_SB.PCI0.AGPB.VID"); /* G41 */
2796
2797 static int __init video_init(struct ibm_init_struct *iibm)
2798 {
2799 int ivga;
2800
2801 vdbg_printk(TPACPI_DBG_INIT, "initializing video subdriver\n");
2802
2803 TPACPI_ACPIHANDLE_INIT(vid);
2804 TPACPI_ACPIHANDLE_INIT(vid2);
2805
2806 if (vid2_handle && acpi_evalf(NULL, &ivga, "\\IVGA", "d") && ivga)
2807 /* G41, assume IVGA doesn't change */
2808 vid_handle = vid2_handle;
2809
2810 if (!vid_handle)
2811 /* video switching not supported on R30, R31 */
2812 video_supported = TPACPI_VIDEO_NONE;
2813 else if (acpi_evalf(vid_handle, &video_orig_autosw, "SWIT", "qd"))
2814 /* 570 */
2815 video_supported = TPACPI_VIDEO_570;
2816 else if (acpi_evalf(vid_handle, &video_orig_autosw, "^VADL", "qd"))
2817 /* 600e/x, 770e, 770x */
2818 video_supported = TPACPI_VIDEO_770;
2819 else
2820 /* all others */
2821 video_supported = TPACPI_VIDEO_NEW;
2822
2823 vdbg_printk(TPACPI_DBG_INIT, "video is %s, mode %d\n",
2824 str_supported(video_supported != TPACPI_VIDEO_NONE),
2825 video_supported);
2826
2827 return (video_supported != TPACPI_VIDEO_NONE)? 0 : 1;
2828 }
2829
2830 static void video_exit(void)
2831 {
2832 dbg_printk(TPACPI_DBG_EXIT,
2833 "restoring original video autoswitch mode\n");
2834 if (video_autosw_set(video_orig_autosw))
2835 printk(TPACPI_ERR "error while trying to restore original "
2836 "video autoswitch mode\n");
2837 }
2838
2839 static int video_outputsw_get(void)
2840 {
2841 int status = 0;
2842 int i;
2843
2844 switch (video_supported) {
2845 case TPACPI_VIDEO_570:
2846 if (!acpi_evalf(NULL, &i, "\\_SB.PHS", "dd",
2847 TP_ACPI_VIDEO_570_PHSCMD))
2848 return -EIO;
2849 status = i & TP_ACPI_VIDEO_570_PHSMASK;
2850 break;
2851 case TPACPI_VIDEO_770:
2852 if (!acpi_evalf(NULL, &i, "\\VCDL", "d"))
2853 return -EIO;
2854 if (i)
2855 status |= TP_ACPI_VIDEO_S_LCD;
2856 if (!acpi_evalf(NULL, &i, "\\VCDC", "d"))
2857 return -EIO;
2858 if (i)
2859 status |= TP_ACPI_VIDEO_S_CRT;
2860 break;
2861 case TPACPI_VIDEO_NEW:
2862 if (!acpi_evalf(NULL, NULL, "\\VUPS", "vd", 1) ||
2863 !acpi_evalf(NULL, &i, "\\VCDC", "d"))
2864 return -EIO;
2865 if (i)
2866 status |= TP_ACPI_VIDEO_S_CRT;
2867
2868 if (!acpi_evalf(NULL, NULL, "\\VUPS", "vd", 0) ||
2869 !acpi_evalf(NULL, &i, "\\VCDL", "d"))
2870 return -EIO;
2871 if (i)
2872 status |= TP_ACPI_VIDEO_S_LCD;
2873 if (!acpi_evalf(NULL, &i, "\\VCDD", "d"))
2874 return -EIO;
2875 if (i)
2876 status |= TP_ACPI_VIDEO_S_DVI;
2877 break;
2878 default:
2879 return -ENOSYS;
2880 }
2881
2882 return status;
2883 }
2884
2885 static int video_outputsw_set(int status)
2886 {
2887 int autosw;
2888 int res = 0;
2889
2890 switch (video_supported) {
2891 case TPACPI_VIDEO_570:
2892 res = acpi_evalf(NULL, NULL,
2893 "\\_SB.PHS2", "vdd",
2894 TP_ACPI_VIDEO_570_PHS2CMD,
2895 status | TP_ACPI_VIDEO_570_PHS2SET);
2896 break;
2897 case TPACPI_VIDEO_770:
2898 autosw = video_autosw_get();
2899 if (autosw < 0)
2900 return autosw;
2901
2902 res = video_autosw_set(1);
2903 if (res)
2904 return res;
2905 res = acpi_evalf(vid_handle, NULL,
2906 "ASWT", "vdd", status * 0x100, 0);
2907 if (!autosw && video_autosw_set(autosw)) {
2908 printk(TPACPI_ERR
2909 "video auto-switch left enabled due to error\n");
2910 return -EIO;
2911 }
2912 break;
2913 case TPACPI_VIDEO_NEW:
2914 res = acpi_evalf(NULL, NULL, "\\VUPS", "vd", 0x80) &&
2915 acpi_evalf(NULL, NULL, "\\VSDS", "vdd", status, 1);
2916 break;
2917 default:
2918 return -ENOSYS;
2919 }
2920
2921 return (res)? 0 : -EIO;
2922 }
2923
2924 static int video_autosw_get(void)
2925 {
2926 int autosw = 0;
2927
2928 switch (video_supported) {
2929 case TPACPI_VIDEO_570:
2930 if (!acpi_evalf(vid_handle, &autosw, "SWIT", "d"))
2931 return -EIO;
2932 break;
2933 case TPACPI_VIDEO_770:
2934 case TPACPI_VIDEO_NEW:
2935 if (!acpi_evalf(vid_handle, &autosw, "^VDEE", "d"))
2936 return -EIO;
2937 break;
2938 default:
2939 return -ENOSYS;
2940 }
2941
2942 return autosw & 1;
2943 }
2944
2945 static int video_autosw_set(int enable)
2946 {
2947 if (!acpi_evalf(vid_handle, NULL, "_DOS", "vd", (enable)? 1 : 0))
2948 return -EIO;
2949 return 0;
2950 }
2951
2952 static int video_outputsw_cycle(void)
2953 {
2954 int autosw = video_autosw_get();
2955 int res;
2956
2957 if (autosw < 0)
2958 return autosw;
2959
2960 switch (video_supported) {
2961 case TPACPI_VIDEO_570:
2962 res = video_autosw_set(1);
2963 if (res)
2964 return res;
2965 res = acpi_evalf(ec_handle, NULL, "_Q16", "v");
2966 break;
2967 case TPACPI_VIDEO_770:
2968 case TPACPI_VIDEO_NEW:
2969 res = video_autosw_set(1);
2970 if (res)
2971 return res;
2972 res = acpi_evalf(vid_handle, NULL, "VSWT", "v");
2973 break;
2974 default:
2975 return -ENOSYS;
2976 }
2977 if (!autosw && video_autosw_set(autosw)) {
2978 printk(TPACPI_ERR
2979 "video auto-switch left enabled due to error\n");
2980 return -EIO;
2981 }
2982
2983 return (res)? 0 : -EIO;
2984 }
2985
2986 static int video_expand_toggle(void)
2987 {
2988 switch (video_supported) {
2989 case TPACPI_VIDEO_570:
2990 return acpi_evalf(ec_handle, NULL, "_Q17", "v")?
2991 0 : -EIO;
2992 case TPACPI_VIDEO_770:
2993 return acpi_evalf(vid_handle, NULL, "VEXP", "v")?
2994 0 : -EIO;
2995 case TPACPI_VIDEO_NEW:
2996 return acpi_evalf(NULL, NULL, "\\VEXP", "v")?
2997 0 : -EIO;
2998 default:
2999 return -ENOSYS;
3000 }
3001 /* not reached */
3002 }
3003
3004 static int video_read(char *p)
3005 {
3006 int status, autosw;
3007 int len = 0;
3008
3009 if (video_supported == TPACPI_VIDEO_NONE) {
3010 len += sprintf(p + len, "status:\t\tnot supported\n");
3011 return len;
3012 }
3013
3014 status = video_outputsw_get();
3015 if (status < 0)
3016 return status;
3017
3018 autosw = video_autosw_get();
3019 if (autosw < 0)
3020 return autosw;
3021
3022 len += sprintf(p + len, "status:\t\tsupported\n");
3023 len += sprintf(p + len, "lcd:\t\t%s\n", enabled(status, 0));
3024 len += sprintf(p + len, "crt:\t\t%s\n", enabled(status, 1));
3025 if (video_supported == TPACPI_VIDEO_NEW)
3026 len += sprintf(p + len, "dvi:\t\t%s\n", enabled(status, 3));
3027 len += sprintf(p + len, "auto:\t\t%s\n", enabled(autosw, 0));
3028 len += sprintf(p + len, "commands:\tlcd_enable, lcd_disable\n");
3029 len += sprintf(p + len, "commands:\tcrt_enable, crt_disable\n");
3030 if (video_supported == TPACPI_VIDEO_NEW)
3031 len += sprintf(p + len, "commands:\tdvi_enable, dvi_disable\n");
3032 len += sprintf(p + len, "commands:\tauto_enable, auto_disable\n");
3033 len += sprintf(p + len, "commands:\tvideo_switch, expand_toggle\n");
3034
3035 return len;
3036 }
3037
3038 static int video_write(char *buf)
3039 {
3040 char *cmd;
3041 int enable, disable, status;
3042 int res;
3043
3044 if (video_supported == TPACPI_VIDEO_NONE)
3045 return -ENODEV;
3046
3047 enable = 0;
3048 disable = 0;
3049
3050 while ((cmd = next_cmd(&buf))) {
3051 if (strlencmp(cmd, "lcd_enable") == 0) {
3052 enable |= TP_ACPI_VIDEO_S_LCD;
3053 } else if (strlencmp(cmd, "lcd_disable") == 0) {
3054 disable |= TP_ACPI_VIDEO_S_LCD;
3055 } else if (strlencmp(cmd, "crt_enable") == 0) {
3056 enable |= TP_ACPI_VIDEO_S_CRT;
3057 } else if (strlencmp(cmd, "crt_disable") == 0) {
3058 disable |= TP_ACPI_VIDEO_S_CRT;
3059 } else if (video_supported == TPACPI_VIDEO_NEW &&
3060 strlencmp(cmd, "dvi_enable") == 0) {
3061 enable |= TP_ACPI_VIDEO_S_DVI;
3062 } else if (video_supported == TPACPI_VIDEO_NEW &&
3063 strlencmp(cmd, "dvi_disable") == 0) {
3064 disable |= TP_ACPI_VIDEO_S_DVI;
3065 } else if (strlencmp(cmd, "auto_enable") == 0) {
3066 res = video_autosw_set(1);
3067 if (res)
3068 return res;
3069 } else if (strlencmp(cmd, "auto_disable") == 0) {
3070 res = video_autosw_set(0);
3071 if (res)
3072 return res;
3073 } else if (strlencmp(cmd, "video_switch") == 0) {
3074 res = video_outputsw_cycle();
3075 if (res)
3076 return res;
3077 } else if (strlencmp(cmd, "expand_toggle") == 0) {
3078 res = video_expand_toggle();
3079 if (res)
3080 return res;
3081 } else
3082 return -EINVAL;
3083 }
3084
3085 if (enable || disable) {
3086 status = video_outputsw_get();
3087 if (status < 0)
3088 return status;
3089 res = video_outputsw_set((status & ~disable) | enable);
3090 if (res)
3091 return res;
3092 }
3093
3094 return 0;
3095 }
3096
3097 static struct ibm_struct video_driver_data = {
3098 .name = "video",
3099 .read = video_read,
3100 .write = video_write,
3101 .exit = video_exit,
3102 };
3103
3104 #endif /* CONFIG_THINKPAD_ACPI_VIDEO */
3105
3106 /*************************************************************************
3107 * Light (thinklight) subdriver
3108 */
3109
3110 TPACPI_HANDLE(lght, root, "\\LGHT"); /* A21e, A2xm/p, T20-22, X20-21 */
3111 TPACPI_HANDLE(ledb, ec, "LEDB"); /* G4x */
3112
3113 static int __init light_init(struct ibm_init_struct *iibm)
3114 {
3115 vdbg_printk(TPACPI_DBG_INIT, "initializing light subdriver\n");
3116
3117 TPACPI_ACPIHANDLE_INIT(ledb);
3118 TPACPI_ACPIHANDLE_INIT(lght);
3119 TPACPI_ACPIHANDLE_INIT(cmos);
3120
3121 /* light not supported on 570, 600e/x, 770e, 770x, G4x, R30, R31 */
3122 tp_features.light = (cmos_handle || lght_handle) && !ledb_handle;
3123
3124 if (tp_features.light)
3125 /* light status not supported on
3126 570, 600e/x, 770e, 770x, G4x, R30, R31, R32, X20 */
3127 tp_features.light_status =
3128 acpi_evalf(ec_handle, NULL, "KBLT", "qv");
3129
3130 vdbg_printk(TPACPI_DBG_INIT, "light is %s\n",
3131 str_supported(tp_features.light));
3132
3133 return (tp_features.light)? 0 : 1;
3134 }
3135
3136 static int light_read(char *p)
3137 {
3138 int len = 0;
3139 int status = 0;
3140
3141 if (!tp_features.light) {
3142 len += sprintf(p + len, "status:\t\tnot supported\n");
3143 } else if (!tp_features.light_status) {
3144 len += sprintf(p + len, "status:\t\tunknown\n");
3145 len += sprintf(p + len, "commands:\ton, off\n");
3146 } else {
3147 if (!acpi_evalf(ec_handle, &status, "KBLT", "d"))
3148 return -EIO;
3149 len += sprintf(p + len, "status:\t\t%s\n", onoff(status, 0));
3150 len += sprintf(p + len, "commands:\ton, off\n");
3151 }
3152
3153 return len;
3154 }
3155
3156 static int light_write(char *buf)
3157 {
3158 int cmos_cmd, lght_cmd;
3159 char *cmd;
3160 int success;
3161
3162 if (!tp_features.light)
3163 return -ENODEV;
3164
3165 while ((cmd = next_cmd(&buf))) {
3166 if (strlencmp(cmd, "on") == 0) {
3167 cmos_cmd = 0x0c;
3168 lght_cmd = 1;
3169 } else if (strlencmp(cmd, "off") == 0) {
3170 cmos_cmd = 0x0d;
3171 lght_cmd = 0;
3172 } else
3173 return -EINVAL;
3174
3175 success = cmos_handle ?
3176 acpi_evalf(cmos_handle, NULL, NULL, "vd", cmos_cmd) :
3177 acpi_evalf(lght_handle, NULL, NULL, "vd", lght_cmd);
3178 if (!success)
3179 return -EIO;
3180 }
3181
3182 return 0;
3183 }
3184
3185 static struct ibm_struct light_driver_data = {
3186 .name = "light",
3187 .read = light_read,
3188 .write = light_write,
3189 };
3190
3191 /*************************************************************************
3192 * Dock subdriver
3193 */
3194
3195 #ifdef CONFIG_THINKPAD_ACPI_DOCK
3196
3197 static void dock_notify(struct ibm_struct *ibm, u32 event);
3198 static int dock_read(char *p);
3199 static int dock_write(char *buf);
3200
3201 TPACPI_HANDLE(dock, root, "\\_SB.GDCK", /* X30, X31, X40 */
3202 "\\_SB.PCI0.DOCK", /* 600e/x,770e,770x,A2xm/p,T20-22,X20-21 */
3203 "\\_SB.PCI0.PCI1.DOCK", /* all others */
3204 "\\_SB.PCI.ISA.SLCE", /* 570 */
3205 ); /* A21e,G4x,R30,R31,R32,R40,R40e,R50e */
3206
3207 /* don't list other alternatives as we install a notify handler on the 570 */
3208 TPACPI_HANDLE(pci, root, "\\_SB.PCI"); /* 570 */
3209
3210 static const struct acpi_device_id ibm_pci_device_ids[] = {
3211 {PCI_ROOT_HID_STRING, 0},
3212 {"", 0},
3213 };
3214
3215 static struct tp_acpi_drv_struct ibm_dock_acpidriver[2] = {
3216 {
3217 .notify = dock_notify,
3218 .handle = &dock_handle,
3219 .type = ACPI_SYSTEM_NOTIFY,
3220 },
3221 {
3222 /* THIS ONE MUST NEVER BE USED FOR DRIVER AUTOLOADING.
3223 * We just use it to get notifications of dock hotplug
3224 * in very old thinkpads */
3225 .hid = ibm_pci_device_ids,
3226 .notify = dock_notify,
3227 .handle = &pci_handle,
3228 .type = ACPI_SYSTEM_NOTIFY,
3229 },
3230 };
3231
3232 static struct ibm_struct dock_driver_data[2] = {
3233 {
3234 .name = "dock",
3235 .read = dock_read,
3236 .write = dock_write,
3237 .acpi = &ibm_dock_acpidriver[0],
3238 },
3239 {
3240 .name = "dock",
3241 .acpi = &ibm_dock_acpidriver[1],
3242 },
3243 };
3244
3245 #define dock_docked() (_sta(dock_handle) & 1)
3246
3247 static int __init dock_init(struct ibm_init_struct *iibm)
3248 {
3249 vdbg_printk(TPACPI_DBG_INIT, "initializing dock subdriver\n");
3250
3251 TPACPI_ACPIHANDLE_INIT(dock);
3252
3253 vdbg_printk(TPACPI_DBG_INIT, "dock is %s\n",
3254 str_supported(dock_handle != NULL));
3255
3256 return (dock_handle)? 0 : 1;
3257 }
3258
3259 static int __init dock_init2(struct ibm_init_struct *iibm)
3260 {
3261 int dock2_needed;
3262
3263 vdbg_printk(TPACPI_DBG_INIT, "initializing dock subdriver part 2\n");
3264
3265 if (dock_driver_data[0].flags.acpi_driver_registered &&
3266 dock_driver_data[0].flags.acpi_notify_installed) {
3267 TPACPI_ACPIHANDLE_INIT(pci);
3268 dock2_needed = (pci_handle != NULL);
3269 vdbg_printk(TPACPI_DBG_INIT,
3270 "dock PCI handler for the TP 570 is %s\n",
3271 str_supported(dock2_needed));
3272 } else {
3273 vdbg_printk(TPACPI_DBG_INIT,
3274 "dock subdriver part 2 not required\n");
3275 dock2_needed = 0;
3276 }
3277
3278 return (dock2_needed)? 0 : 1;
3279 }
3280
3281 static void dock_notify(struct ibm_struct *ibm, u32 event)
3282 {
3283 int docked = dock_docked();
3284 int pci = ibm->acpi->hid && ibm->acpi->device &&
3285 acpi_match_device_ids(ibm->acpi->device, ibm_pci_device_ids);
3286 int data;
3287
3288 if (event == 1 && !pci) /* 570 */
3289 data = 1; /* button */
3290 else if (event == 1 && pci) /* 570 */
3291 data = 3; /* dock */
3292 else if (event == 3 && docked)
3293 data = 1; /* button */
3294 else if (event == 3 && !docked)
3295 data = 2; /* undock */
3296 else if (event == 0 && docked)
3297 data = 3; /* dock */
3298 else {
3299 printk(TPACPI_ERR "unknown dock event %d, status %d\n",
3300 event, _sta(dock_handle));
3301 data = 0; /* unknown */
3302 }
3303 acpi_bus_generate_proc_event(ibm->acpi->device, event, data);
3304 acpi_bus_generate_netlink_event(ibm->acpi->device->pnp.device_class,
3305 ibm->acpi->device->dev.bus_id,
3306 event, data);
3307 }
3308
3309 static int dock_read(char *p)
3310 {
3311 int len = 0;
3312 int docked = dock_docked();
3313
3314 if (!dock_handle)
3315 len += sprintf(p + len, "status:\t\tnot supported\n");
3316 else if (!docked)
3317 len += sprintf(p + len, "status:\t\tundocked\n");
3318 else {
3319 len += sprintf(p + len, "status:\t\tdocked\n");
3320 len += sprintf(p + len, "commands:\tdock, undock\n");
3321 }
3322
3323 return len;
3324 }
3325
3326 static int dock_write(char *buf)
3327 {
3328 char *cmd;
3329
3330 if (!dock_docked())
3331 return -ENODEV;
3332
3333 while ((cmd = next_cmd(&buf))) {
3334 if (strlencmp(cmd, "undock") == 0) {
3335 if (!acpi_evalf(dock_handle, NULL, "_DCK", "vd", 0) ||
3336 !acpi_evalf(dock_handle, NULL, "_EJ0", "vd", 1))
3337 return -EIO;
3338 } else if (strlencmp(cmd, "dock") == 0) {
3339 if (!acpi_evalf(dock_handle, NULL, "_DCK", "vd", 1))
3340 return -EIO;
3341 } else
3342 return -EINVAL;
3343 }
3344
3345 return 0;
3346 }
3347
3348 #endif /* CONFIG_THINKPAD_ACPI_DOCK */
3349
3350 /*************************************************************************
3351 * Bay subdriver
3352 */
3353
3354 #ifdef CONFIG_THINKPAD_ACPI_BAY
3355
3356 TPACPI_HANDLE(bay, root, "\\_SB.PCI.IDE.SECN.MAST", /* 570 */
3357 "\\_SB.PCI0.IDE0.IDES.IDSM", /* 600e/x, 770e, 770x */
3358 "\\_SB.PCI0.SATA.SCND.MSTR", /* T60, X60, Z60 */
3359 "\\_SB.PCI0.IDE0.SCND.MSTR", /* all others */
3360 ); /* A21e, R30, R31 */
3361 TPACPI_HANDLE(bay_ej, bay, "_EJ3", /* 600e/x, A2xm/p, A3x */
3362 "_EJ0", /* all others */
3363 ); /* 570,A21e,G4x,R30,R31,R32,R40e,R50e */
3364 TPACPI_HANDLE(bay2, root, "\\_SB.PCI0.IDE0.PRIM.SLAV", /* A3x, R32 */
3365 "\\_SB.PCI0.IDE0.IDEP.IDPS", /* 600e/x, 770e, 770x */
3366 ); /* all others */
3367 TPACPI_HANDLE(bay2_ej, bay2, "_EJ3", /* 600e/x, 770e, A3x */
3368 "_EJ0", /* 770x */
3369 ); /* all others */
3370
3371 static int __init bay_init(struct ibm_init_struct *iibm)
3372 {
3373 vdbg_printk(TPACPI_DBG_INIT, "initializing bay subdriver\n");
3374
3375 TPACPI_ACPIHANDLE_INIT(bay);
3376 if (bay_handle)
3377 TPACPI_ACPIHANDLE_INIT(bay_ej);
3378 TPACPI_ACPIHANDLE_INIT(bay2);
3379 if (bay2_handle)
3380 TPACPI_ACPIHANDLE_INIT(bay2_ej);
3381
3382 tp_features.bay_status = bay_handle &&
3383 acpi_evalf(bay_handle, NULL, "_STA", "qv");
3384 tp_features.bay_status2 = bay2_handle &&
3385 acpi_evalf(bay2_handle, NULL, "_STA", "qv");
3386
3387 tp_features.bay_eject = bay_handle && bay_ej_handle &&
3388 (strlencmp(bay_ej_path, "_EJ0") == 0 || experimental);
3389 tp_features.bay_eject2 = bay2_handle && bay2_ej_handle &&
3390 (strlencmp(bay2_ej_path, "_EJ0") == 0 || experimental);
3391
3392 vdbg_printk(TPACPI_DBG_INIT,
3393 "bay 1: status %s, eject %s; bay 2: status %s, eject %s\n",
3394 str_supported(tp_features.bay_status),
3395 str_supported(tp_features.bay_eject),
3396 str_supported(tp_features.bay_status2),
3397 str_supported(tp_features.bay_eject2));
3398
3399 return (tp_features.bay_status || tp_features.bay_eject ||
3400 tp_features.bay_status2 || tp_features.bay_eject2)? 0 : 1;
3401 }
3402
3403 static void bay_notify(struct ibm_struct *ibm, u32 event)
3404 {
3405 acpi_bus_generate_proc_event(ibm->acpi->device, event, 0);
3406 acpi_bus_generate_netlink_event(ibm->acpi->device->pnp.device_class,
3407 ibm->acpi->device->dev.bus_id,
3408 event, 0);
3409 }
3410
3411 #define bay_occupied(b) (_sta(b##_handle) & 1)
3412
3413 static int bay_read(char *p)
3414 {
3415 int len = 0;
3416 int occupied = bay_occupied(bay);
3417 int occupied2 = bay_occupied(bay2);
3418 int eject, eject2;
3419
3420 len += sprintf(p + len, "status:\t\t%s\n",
3421 tp_features.bay_status ?
3422 (occupied ? "occupied" : "unoccupied") :
3423 "not supported");
3424 if (tp_features.bay_status2)
3425 len += sprintf(p + len, "status2:\t%s\n", occupied2 ?
3426 "occupied" : "unoccupied");
3427
3428 eject = tp_features.bay_eject && occupied;
3429 eject2 = tp_features.bay_eject2 && occupied2;
3430
3431 if (eject && eject2)
3432 len += sprintf(p + len, "commands:\teject, eject2\n");
3433 else if (eject)
3434 len += sprintf(p + len, "commands:\teject\n");
3435 else if (eject2)
3436 len += sprintf(p + len, "commands:\teject2\n");
3437
3438 return len;
3439 }
3440
3441 static int bay_write(char *buf)
3442 {
3443 char *cmd;
3444
3445 if (!tp_features.bay_eject && !tp_features.bay_eject2)
3446 return -ENODEV;
3447
3448 while ((cmd = next_cmd(&buf))) {
3449 if (tp_features.bay_eject && strlencmp(cmd, "eject") == 0) {
3450 if (!acpi_evalf(bay_ej_handle, NULL, NULL, "vd", 1))
3451 return -EIO;
3452 } else if (tp_features.bay_eject2 &&
3453 strlencmp(cmd, "eject2") == 0) {
3454 if (!acpi_evalf(bay2_ej_handle, NULL, NULL, "vd", 1))
3455 return -EIO;
3456 } else
3457 return -EINVAL;
3458 }
3459
3460 return 0;
3461 }
3462
3463 static struct tp_acpi_drv_struct ibm_bay_acpidriver = {
3464 .notify = bay_notify,
3465 .handle = &bay_handle,
3466 .type = ACPI_SYSTEM_NOTIFY,
3467 };
3468
3469 static struct ibm_struct bay_driver_data = {
3470 .name = "bay",
3471 .read = bay_read,
3472 .write = bay_write,
3473 .acpi = &ibm_bay_acpidriver,
3474 };
3475
3476 #endif /* CONFIG_THINKPAD_ACPI_BAY */
3477
3478 /*************************************************************************
3479 * CMOS subdriver
3480 */
3481
3482 /* sysfs cmos_command -------------------------------------------------- */
3483 static ssize_t cmos_command_store(struct device *dev,
3484 struct device_attribute *attr,
3485 const char *buf, size_t count)
3486 {
3487 unsigned long cmos_cmd;
3488 int res;
3489
3490 if (parse_strtoul(buf, 21, &cmos_cmd))
3491 return -EINVAL;
3492
3493 res = issue_thinkpad_cmos_command(cmos_cmd);
3494 return (res)? res : count;
3495 }
3496
3497 static struct device_attribute dev_attr_cmos_command =
3498 __ATTR(cmos_command, S_IWUSR, NULL, cmos_command_store);
3499
3500 /* --------------------------------------------------------------------- */
3501
3502 static int __init cmos_init(struct ibm_init_struct *iibm)
3503 {
3504 int res;
3505
3506 vdbg_printk(TPACPI_DBG_INIT,
3507 "initializing cmos commands subdriver\n");
3508
3509 TPACPI_ACPIHANDLE_INIT(cmos);
3510
3511 vdbg_printk(TPACPI_DBG_INIT, "cmos commands are %s\n",
3512 str_supported(cmos_handle != NULL));
3513
3514 res = device_create_file(&tpacpi_pdev->dev, &dev_attr_cmos_command);
3515 if (res)
3516 return res;
3517
3518 return (cmos_handle)? 0 : 1;
3519 }
3520
3521 static void cmos_exit(void)
3522 {
3523 device_remove_file(&tpacpi_pdev->dev, &dev_attr_cmos_command);
3524 }
3525
3526 static int cmos_read(char *p)
3527 {
3528 int len = 0;
3529
3530 /* cmos not supported on 570, 600e/x, 770e, 770x, A21e, A2xm/p,
3531 R30, R31, T20-22, X20-21 */
3532 if (!cmos_handle)
3533 len += sprintf(p + len, "status:\t\tnot supported\n");
3534 else {
3535 len += sprintf(p + len, "status:\t\tsupported\n");
3536 len += sprintf(p + len, "commands:\t<cmd> (<cmd> is 0-21)\n");
3537 }
3538
3539 return len;
3540 }
3541
3542 static int cmos_write(char *buf)
3543 {
3544 char *cmd;
3545 int cmos_cmd, res;
3546
3547 while ((cmd = next_cmd(&buf))) {
3548 if (sscanf(cmd, "%u", &cmos_cmd) == 1 &&
3549 cmos_cmd >= 0 && cmos_cmd <= 21) {
3550 /* cmos_cmd set */
3551 } else
3552 return -EINVAL;
3553
3554 res = issue_thinkpad_cmos_command(cmos_cmd);
3555 if (res)
3556 return res;
3557 }
3558
3559 return 0;
3560 }
3561
3562 static struct ibm_struct cmos_driver_data = {
3563 .name = "cmos",
3564 .read = cmos_read,
3565 .write = cmos_write,
3566 .exit = cmos_exit,
3567 };
3568
3569 /*************************************************************************
3570 * LED subdriver
3571 */
3572
3573 enum led_access_mode {
3574 TPACPI_LED_NONE = 0,
3575 TPACPI_LED_570, /* 570 */
3576 TPACPI_LED_OLD, /* 600e/x, 770e, 770x, A21e, A2xm/p, T20-22, X20-21 */
3577 TPACPI_LED_NEW, /* all others */
3578 };
3579
3580 enum { /* For TPACPI_LED_OLD */
3581 TPACPI_LED_EC_HLCL = 0x0c, /* EC reg to get led to power on */
3582 TPACPI_LED_EC_HLBL = 0x0d, /* EC reg to blink a lit led */
3583 TPACPI_LED_EC_HLMS = 0x0e, /* EC reg to select led to command */
3584 };
3585
3586 static enum led_access_mode led_supported;
3587
3588 TPACPI_HANDLE(led, ec, "SLED", /* 570 */
3589 "SYSL", /* 600e/x, 770e, 770x, A21e, A2xm/p, */
3590 /* T20-22, X20-21 */
3591 "LED", /* all others */
3592 ); /* R30, R31 */
3593
3594 static int __init led_init(struct ibm_init_struct *iibm)
3595 {
3596 vdbg_printk(TPACPI_DBG_INIT, "initializing LED subdriver\n");
3597
3598 TPACPI_ACPIHANDLE_INIT(led);
3599
3600 if (!led_handle)
3601 /* led not supported on R30, R31 */
3602 led_supported = TPACPI_LED_NONE;
3603 else if (strlencmp(led_path, "SLED") == 0)
3604 /* 570 */
3605 led_supported = TPACPI_LED_570;
3606 else if (strlencmp(led_path, "SYSL") == 0)
3607 /* 600e/x, 770e, 770x, A21e, A2xm/p, T20-22, X20-21 */
3608 led_supported = TPACPI_LED_OLD;
3609 else
3610 /* all others */
3611 led_supported = TPACPI_LED_NEW;
3612
3613 vdbg_printk(TPACPI_DBG_INIT, "LED commands are %s, mode %d\n",
3614 str_supported(led_supported), led_supported);
3615
3616 return (led_supported != TPACPI_LED_NONE)? 0 : 1;
3617 }
3618
3619 #define led_status(s) ((s) == 0 ? "off" : ((s) == 1 ? "on" : "blinking"))
3620
3621 static int led_read(char *p)
3622 {
3623 int len = 0;
3624
3625 if (!led_supported) {
3626 len += sprintf(p + len, "status:\t\tnot supported\n");
3627 return len;
3628 }
3629 len += sprintf(p + len, "status:\t\tsupported\n");
3630
3631 if (led_supported == TPACPI_LED_570) {
3632 /* 570 */
3633 int i, status;
3634 for (i = 0; i < 8; i++) {
3635 if (!acpi_evalf(ec_handle,
3636 &status, "GLED", "dd", 1 << i))
3637 return -EIO;
3638 len += sprintf(p + len, "%d:\t\t%s\n",
3639 i, led_status(status));
3640 }
3641 }
3642
3643 len += sprintf(p + len, "commands:\t"
3644 "<led> on, <led> off, <led> blink (<led> is 0-7)\n");
3645
3646 return len;
3647 }
3648
3649 /* off, on, blink */
3650 static const int led_sled_arg1[] = { 0, 1, 3 };
3651 static const int led_exp_hlbl[] = { 0, 0, 1 }; /* led# * */
3652 static const int led_exp_hlcl[] = { 0, 1, 1 }; /* led# * */
3653 static const int led_led_arg1[] = { 0, 0x80, 0xc0 };
3654
3655 static int led_write(char *buf)
3656 {
3657 char *cmd;
3658 int led, ind, ret;
3659
3660 if (!led_supported)
3661 return -ENODEV;
3662
3663 while ((cmd = next_cmd(&buf))) {
3664 if (sscanf(cmd, "%d", &led) != 1 || led < 0 || led > 7)
3665 return -EINVAL;
3666
3667 if (strstr(cmd, "off")) {
3668 ind = 0;
3669 } else if (strstr(cmd, "on")) {
3670 ind = 1;
3671 } else if (strstr(cmd, "blink")) {
3672 ind = 2;
3673 } else
3674 return -EINVAL;
3675
3676 if (led_supported == TPACPI_LED_570) {
3677 /* 570 */
3678 led = 1 << led;
3679 if (!acpi_evalf(led_handle, NULL, NULL, "vdd",
3680 led, led_sled_arg1[ind]))
3681 return -EIO;
3682 } else if (led_supported == TPACPI_LED_OLD) {
3683 /* 600e/x, 770e, 770x, A21e, A2xm/p, T20-22, X20 */
3684 led = 1 << led;
3685 ret = ec_write(TPACPI_LED_EC_HLMS, led);
3686 if (ret >= 0)
3687 ret = ec_write(TPACPI_LED_EC_HLBL,
3688 led * led_exp_hlbl[ind]);
3689 if (ret >= 0)
3690 ret = ec_write(TPACPI_LED_EC_HLCL,
3691 led * led_exp_hlcl[ind]);
3692 if (ret < 0)
3693 return ret;
3694 } else {
3695 /* all others */
3696 if (!acpi_evalf(led_handle, NULL, NULL, "vdd",
3697 led, led_led_arg1[ind]))
3698 return -EIO;
3699 }
3700 }
3701
3702 return 0;
3703 }
3704
3705 static struct ibm_struct led_driver_data = {
3706 .name = "led",
3707 .read = led_read,
3708 .write = led_write,
3709 };
3710
3711 /*************************************************************************
3712 * Beep subdriver
3713 */
3714
3715 TPACPI_HANDLE(beep, ec, "BEEP"); /* all except R30, R31 */
3716
3717 static int __init beep_init(struct ibm_init_struct *iibm)
3718 {
3719 vdbg_printk(TPACPI_DBG_INIT, "initializing beep subdriver\n");
3720
3721 TPACPI_ACPIHANDLE_INIT(beep);
3722
3723 vdbg_printk(TPACPI_DBG_INIT, "beep is %s\n",
3724 str_supported(beep_handle != NULL));
3725
3726 return (beep_handle)? 0 : 1;
3727 }
3728
3729 static int beep_read(char *p)
3730 {
3731 int len = 0;
3732
3733 if (!beep_handle)
3734 len += sprintf(p + len, "status:\t\tnot supported\n");
3735 else {
3736 len += sprintf(p + len, "status:\t\tsupported\n");
3737 len += sprintf(p + len, "commands:\t<cmd> (<cmd> is 0-17)\n");
3738 }
3739
3740 return len;
3741 }
3742
3743 static int beep_write(char *buf)
3744 {
3745 char *cmd;
3746 int beep_cmd;
3747
3748 if (!beep_handle)
3749 return -ENODEV;
3750
3751 while ((cmd = next_cmd(&buf))) {
3752 if (sscanf(cmd, "%u", &beep_cmd) == 1 &&
3753 beep_cmd >= 0 && beep_cmd <= 17) {
3754 /* beep_cmd set */
3755 } else
3756 return -EINVAL;
3757 if (!acpi_evalf(beep_handle, NULL, NULL, "vdd", beep_cmd, 0))
3758 return -EIO;
3759 }
3760
3761 return 0;
3762 }
3763
3764 static struct ibm_struct beep_driver_data = {
3765 .name = "beep",
3766 .read = beep_read,
3767 .write = beep_write,
3768 };
3769
3770 /*************************************************************************
3771 * Thermal subdriver
3772 */
3773
3774 enum thermal_access_mode {
3775 TPACPI_THERMAL_NONE = 0, /* No thermal support */
3776 TPACPI_THERMAL_ACPI_TMP07, /* Use ACPI TMP0-7 */
3777 TPACPI_THERMAL_ACPI_UPDT, /* Use ACPI TMP0-7 with UPDT */
3778 TPACPI_THERMAL_TPEC_8, /* Use ACPI EC regs, 8 sensors */
3779 TPACPI_THERMAL_TPEC_16, /* Use ACPI EC regs, 16 sensors */
3780 };
3781
3782 enum { /* TPACPI_THERMAL_TPEC_* */
3783 TP_EC_THERMAL_TMP0 = 0x78, /* ACPI EC regs TMP 0..7 */
3784 TP_EC_THERMAL_TMP8 = 0xC0, /* ACPI EC regs TMP 8..15 */
3785 TP_EC_THERMAL_TMP_NA = -128, /* ACPI EC sensor not available */
3786 };
3787
3788 #define TPACPI_MAX_THERMAL_SENSORS 16 /* Max thermal sensors supported */
3789 struct ibm_thermal_sensors_struct {
3790 s32 temp[TPACPI_MAX_THERMAL_SENSORS];
3791 };
3792
3793 static enum thermal_access_mode thermal_read_mode;
3794
3795 /* idx is zero-based */
3796 static int thermal_get_sensor(int idx, s32 *value)
3797 {
3798 int t;
3799 s8 tmp;
3800 char tmpi[5];
3801
3802 t = TP_EC_THERMAL_TMP0;
3803
3804 switch (thermal_read_mode) {
3805 #if TPACPI_MAX_THERMAL_SENSORS >= 16
3806 case TPACPI_THERMAL_TPEC_16:
3807 if (idx >= 8 && idx <= 15) {
3808 t = TP_EC_THERMAL_TMP8;
3809 idx -= 8;
3810 }
3811 /* fallthrough */
3812 #endif
3813 case TPACPI_THERMAL_TPEC_8:
3814 if (idx <= 7) {
3815 if (!acpi_ec_read(t + idx, &tmp))
3816 return -EIO;
3817 *value = tmp * 1000;
3818 return 0;
3819 }
3820 break;
3821
3822 case TPACPI_THERMAL_ACPI_UPDT:
3823 if (idx <= 7) {
3824 snprintf(tmpi, sizeof(tmpi), "TMP%c", '0' + idx);
3825 if (!acpi_evalf(ec_handle, NULL, "UPDT", "v"))
3826 return -EIO;
3827 if (!acpi_evalf(ec_handle, &t, tmpi, "d"))
3828 return -EIO;
3829 *value = (t - 2732) * 100;
3830 return 0;
3831 }
3832 break;
3833
3834 case TPACPI_THERMAL_ACPI_TMP07:
3835 if (idx <= 7) {
3836 snprintf(tmpi, sizeof(tmpi), "TMP%c", '0' + idx);
3837 if (!acpi_evalf(ec_handle, &t, tmpi, "d"))
3838 return -EIO;
3839 if (t > 127 || t < -127)
3840 t = TP_EC_THERMAL_TMP_NA;
3841 *value = t * 1000;
3842 return 0;
3843 }
3844 break;
3845
3846 case TPACPI_THERMAL_NONE:
3847 default:
3848 return -ENOSYS;
3849 }
3850
3851 return -EINVAL;
3852 }
3853
3854 static int thermal_get_sensors(struct ibm_thermal_sensors_struct *s)
3855 {
3856 int res, i;
3857 int n;
3858
3859 n = 8;
3860 i = 0;
3861
3862 if (!s)
3863 return -EINVAL;
3864
3865 if (thermal_read_mode == TPACPI_THERMAL_TPEC_16)
3866 n = 16;
3867
3868 for (i = 0 ; i < n; i++) {
3869 res = thermal_get_sensor(i, &s->temp[i]);
3870 if (res)
3871 return res;
3872 }
3873
3874 return n;
3875 }
3876
3877 /* sysfs temp##_input -------------------------------------------------- */
3878
3879 static ssize_t thermal_temp_input_show(struct device *dev,
3880 struct device_attribute *attr,
3881 char *buf)
3882 {
3883 struct sensor_device_attribute *sensor_attr =
3884 to_sensor_dev_attr(attr);
3885 int idx = sensor_attr->index;
3886 s32 value;
3887 int res;
3888
3889 res = thermal_get_sensor(idx, &value);
3890 if (res)
3891 return res;
3892 if (value == TP_EC_THERMAL_TMP_NA * 1000)
3893 return -ENXIO;
3894
3895 return snprintf(buf, PAGE_SIZE, "%d\n", value);
3896 }
3897
3898 #define THERMAL_SENSOR_ATTR_TEMP(_idxA, _idxB) \
3899 SENSOR_ATTR(temp##_idxA##_input, S_IRUGO, \
3900 thermal_temp_input_show, NULL, _idxB)
3901
3902 static struct sensor_device_attribute sensor_dev_attr_thermal_temp_input[] = {
3903 THERMAL_SENSOR_ATTR_TEMP(1, 0),
3904 THERMAL_SENSOR_ATTR_TEMP(2, 1),
3905 THERMAL_SENSOR_ATTR_TEMP(3, 2),
3906 THERMAL_SENSOR_ATTR_TEMP(4, 3),
3907 THERMAL_SENSOR_ATTR_TEMP(5, 4),
3908 THERMAL_SENSOR_ATTR_TEMP(6, 5),
3909 THERMAL_SENSOR_ATTR_TEMP(7, 6),
3910 THERMAL_SENSOR_ATTR_TEMP(8, 7),
3911 THERMAL_SENSOR_ATTR_TEMP(9, 8),
3912 THERMAL_SENSOR_ATTR_TEMP(10, 9),
3913 THERMAL_SENSOR_ATTR_TEMP(11, 10),
3914 THERMAL_SENSOR_ATTR_TEMP(12, 11),
3915 THERMAL_SENSOR_ATTR_TEMP(13, 12),
3916 THERMAL_SENSOR_ATTR_TEMP(14, 13),
3917 THERMAL_SENSOR_ATTR_TEMP(15, 14),
3918 THERMAL_SENSOR_ATTR_TEMP(16, 15),
3919 };
3920
3921 #define THERMAL_ATTRS(X) \
3922 &sensor_dev_attr_thermal_temp_input[X].dev_attr.attr
3923
3924 static struct attribute *thermal_temp_input_attr[] = {
3925 THERMAL_ATTRS(8),
3926 THERMAL_ATTRS(9),
3927 THERMAL_ATTRS(10),
3928 THERMAL_ATTRS(11),
3929 THERMAL_ATTRS(12),
3930 THERMAL_ATTRS(13),
3931 THERMAL_ATTRS(14),
3932 THERMAL_ATTRS(15),
3933 THERMAL_ATTRS(0),
3934 THERMAL_ATTRS(1),
3935 THERMAL_ATTRS(2),
3936 THERMAL_ATTRS(3),
3937 THERMAL_ATTRS(4),
3938 THERMAL_ATTRS(5),
3939 THERMAL_ATTRS(6),
3940 THERMAL_ATTRS(7),
3941 NULL
3942 };
3943
3944 static const struct attribute_group thermal_temp_input16_group = {
3945 .attrs = thermal_temp_input_attr
3946 };
3947
3948 static const struct attribute_group thermal_temp_input8_group = {
3949 .attrs = &thermal_temp_input_attr[8]
3950 };
3951
3952 #undef THERMAL_SENSOR_ATTR_TEMP
3953 #undef THERMAL_ATTRS
3954
3955 /* --------------------------------------------------------------------- */
3956
3957 static int __init thermal_init(struct ibm_init_struct *iibm)
3958 {
3959 u8 t, ta1, ta2;
3960 int i;
3961 int acpi_tmp7;
3962 int res;
3963
3964 vdbg_printk(TPACPI_DBG_INIT, "initializing thermal subdriver\n");
3965
3966 acpi_tmp7 = acpi_evalf(ec_handle, NULL, "TMP7", "qv");
3967
3968 if (thinkpad_id.ec_model) {
3969 /*
3970 * Direct EC access mode: sensors at registers
3971 * 0x78-0x7F, 0xC0-0xC7. Registers return 0x00 for
3972 * non-implemented, thermal sensors return 0x80 when
3973 * not available
3974 */
3975
3976 ta1 = ta2 = 0;
3977 for (i = 0; i < 8; i++) {
3978 if (acpi_ec_read(TP_EC_THERMAL_TMP0 + i, &t)) {
3979 ta1 |= t;
3980 } else {
3981 ta1 = 0;
3982 break;
3983 }
3984 if (acpi_ec_read(TP_EC_THERMAL_TMP8 + i, &t)) {
3985 ta2 |= t;
3986 } else {
3987 ta1 = 0;
3988 break;
3989 }
3990 }
3991 if (ta1 == 0) {
3992 /* This is sheer paranoia, but we handle it anyway */
3993 if (acpi_tmp7) {
3994 printk(TPACPI_ERR
3995 "ThinkPad ACPI EC access misbehaving, "
3996 "falling back to ACPI TMPx access "
3997 "mode\n");
3998 thermal_read_mode = TPACPI_THERMAL_ACPI_TMP07;
3999 } else {
4000 printk(TPACPI_ERR
4001 "ThinkPad ACPI EC access misbehaving, "
4002 "disabling thermal sensors access\n");
4003 thermal_read_mode = TPACPI_THERMAL_NONE;
4004 }
4005 } else {
4006 thermal_read_mode =
4007 (ta2 != 0) ?
4008 TPACPI_THERMAL_TPEC_16 : TPACPI_THERMAL_TPEC_8;
4009 }
4010 } else if (acpi_tmp7) {
4011 if (acpi_evalf(ec_handle, NULL, "UPDT", "qv")) {
4012 /* 600e/x, 770e, 770x */
4013 thermal_read_mode = TPACPI_THERMAL_ACPI_UPDT;
4014 } else {
4015 /* Standard ACPI TMPx access, max 8 sensors */
4016 thermal_read_mode = TPACPI_THERMAL_ACPI_TMP07;
4017 }
4018 } else {
4019 /* temperatures not supported on 570, G4x, R30, R31, R32 */
4020 thermal_read_mode = TPACPI_THERMAL_NONE;
4021 }
4022
4023 vdbg_printk(TPACPI_DBG_INIT, "thermal is %s, mode %d\n",
4024 str_supported(thermal_read_mode != TPACPI_THERMAL_NONE),
4025 thermal_read_mode);
4026
4027 switch (thermal_read_mode) {
4028 case TPACPI_THERMAL_TPEC_16:
4029 res = sysfs_create_group(&tpacpi_sensors_pdev->dev.kobj,
4030 &thermal_temp_input16_group);
4031 if (res)
4032 return res;
4033 break;
4034 case TPACPI_THERMAL_TPEC_8:
4035 case TPACPI_THERMAL_ACPI_TMP07:
4036 case TPACPI_THERMAL_ACPI_UPDT:
4037 res = sysfs_create_group(&tpacpi_sensors_pdev->dev.kobj,
4038 &thermal_temp_input8_group);
4039 if (res)
4040 return res;
4041 break;
4042 case TPACPI_THERMAL_NONE:
4043 default:
4044 return 1;
4045 }
4046
4047 return 0;
4048 }
4049
4050 static void thermal_exit(void)
4051 {
4052 switch (thermal_read_mode) {
4053 case TPACPI_THERMAL_TPEC_16:
4054 sysfs_remove_group(&tpacpi_sensors_pdev->dev.kobj,
4055 &thermal_temp_input16_group);
4056 break;
4057 case TPACPI_THERMAL_TPEC_8:
4058 case TPACPI_THERMAL_ACPI_TMP07:
4059 case TPACPI_THERMAL_ACPI_UPDT:
4060 sysfs_remove_group(&tpacpi_sensors_pdev->dev.kobj,
4061 &thermal_temp_input16_group);
4062 break;
4063 case TPACPI_THERMAL_NONE:
4064 default:
4065 break;
4066 }
4067 }
4068
4069 static int thermal_read(char *p)
4070 {
4071 int len = 0;
4072 int n, i;
4073 struct ibm_thermal_sensors_struct t;
4074
4075 n = thermal_get_sensors(&t);
4076 if (unlikely(n < 0))
4077 return n;
4078
4079 len += sprintf(p + len, "temperatures:\t");
4080
4081 if (n > 0) {
4082 for (i = 0; i < (n - 1); i++)
4083 len += sprintf(p + len, "%d ", t.temp[i] / 1000);
4084 len += sprintf(p + len, "%d\n", t.temp[i] / 1000);
4085 } else
4086 len += sprintf(p + len, "not supported\n");
4087
4088 return len;
4089 }
4090
4091 static struct ibm_struct thermal_driver_data = {
4092 .name = "thermal",
4093 .read = thermal_read,
4094 .exit = thermal_exit,
4095 };
4096
4097 /*************************************************************************
4098 * EC Dump subdriver
4099 */
4100
4101 static u8 ecdump_regs[256];
4102
4103 static int ecdump_read(char *p)
4104 {
4105 int len = 0;
4106 int i, j;
4107 u8 v;
4108
4109 len += sprintf(p + len, "EC "
4110 " +00 +01 +02 +03 +04 +05 +06 +07"
4111 " +08 +09 +0a +0b +0c +0d +0e +0f\n");
4112 for (i = 0; i < 256; i += 16) {
4113 len += sprintf(p + len, "EC 0x%02x:", i);
4114 for (j = 0; j < 16; j++) {
4115 if (!acpi_ec_read(i + j, &v))
4116 break;
4117 if (v != ecdump_regs[i + j])
4118 len += sprintf(p + len, " *%02x", v);
4119 else
4120 len += sprintf(p + len, " %02x", v);
4121 ecdump_regs[i + j] = v;
4122 }
4123 len += sprintf(p + len, "\n");
4124 if (j != 16)
4125 break;
4126 }
4127
4128 /* These are way too dangerous to advertise openly... */
4129 #if 0
4130 len += sprintf(p + len, "commands:\t0x<offset> 0x<value>"
4131 " (<offset> is 00-ff, <value> is 00-ff)\n");
4132 len += sprintf(p + len, "commands:\t0x<offset> <value> "
4133 " (<offset> is 00-ff, <value> is 0-255)\n");
4134 #endif
4135 return len;
4136 }
4137
4138 static int ecdump_write(char *buf)
4139 {
4140 char *cmd;
4141 int i, v;
4142
4143 while ((cmd = next_cmd(&buf))) {
4144 if (sscanf(cmd, "0x%x 0x%x", &i, &v) == 2) {
4145 /* i and v set */
4146 } else if (sscanf(cmd, "0x%x %u", &i, &v) == 2) {
4147 /* i and v set */
4148 } else
4149 return -EINVAL;
4150 if (i >= 0 && i < 256 && v >= 0 && v < 256) {
4151 if (!acpi_ec_write(i, v))
4152 return -EIO;
4153 } else
4154 return -EINVAL;
4155 }
4156
4157 return 0;
4158 }
4159
4160 static struct ibm_struct ecdump_driver_data = {
4161 .name = "ecdump",
4162 .read = ecdump_read,
4163 .write = ecdump_write,
4164 .flags.experimental = 1,
4165 };
4166
4167 /*************************************************************************
4168 * Backlight/brightness subdriver
4169 */
4170
4171 #define TPACPI_BACKLIGHT_DEV_NAME "thinkpad_screen"
4172
4173 static struct backlight_device *ibm_backlight_device;
4174 static int brightness_offset = 0x31;
4175 static int brightness_mode;
4176 static unsigned int brightness_enable = 2; /* 2 = auto, 0 = no, 1 = yes */
4177
4178 static struct mutex brightness_mutex;
4179
4180 /*
4181 * ThinkPads can read brightness from two places: EC 0x31, or
4182 * CMOS NVRAM byte 0x5E, bits 0-3.
4183 */
4184 static int brightness_get(struct backlight_device *bd)
4185 {
4186 u8 lec = 0, lcmos = 0, level = 0;
4187
4188 if (brightness_mode & 1) {
4189 if (!acpi_ec_read(brightness_offset, &lec))
4190 return -EIO;
4191 lec &= (tp_features.bright_16levels)? 0x0f : 0x07;
4192 level = lec;
4193 };
4194 if (brightness_mode & 2) {
4195 lcmos = (nvram_read_byte(TP_NVRAM_ADDR_BRIGHTNESS)
4196 & TP_NVRAM_MASK_LEVEL_BRIGHTNESS)
4197 >> TP_NVRAM_POS_LEVEL_BRIGHTNESS;
4198 lcmos &= (tp_features.bright_16levels)? 0x0f : 0x07;
4199 level = lcmos;
4200 }
4201
4202 if (brightness_mode == 3 && lec != lcmos) {
4203 printk(TPACPI_ERR
4204 "CMOS NVRAM (%u) and EC (%u) do not agree "
4205 "on display brightness level\n",
4206 (unsigned int) lcmos,
4207 (unsigned int) lec);
4208 return -EIO;
4209 }
4210
4211 return level;
4212 }
4213
4214 /* May return EINTR which can always be mapped to ERESTARTSYS */
4215 static int brightness_set(int value)
4216 {
4217 int cmos_cmd, inc, i, res;
4218 int current_value;
4219
4220 if (value > ((tp_features.bright_16levels)? 15 : 7))
4221 return -EINVAL;
4222
4223 res = mutex_lock_interruptible(&brightness_mutex);
4224 if (res < 0)
4225 return res;
4226
4227 current_value = brightness_get(NULL);
4228 if (current_value < 0) {
4229 res = current_value;
4230 goto errout;
4231 }
4232
4233 cmos_cmd = value > current_value ?
4234 TP_CMOS_BRIGHTNESS_UP :
4235 TP_CMOS_BRIGHTNESS_DOWN;
4236 inc = (value > current_value)? 1 : -1;
4237
4238 res = 0;
4239 for (i = current_value; i != value; i += inc) {
4240 if ((brightness_mode & 2) &&
4241 issue_thinkpad_cmos_command(cmos_cmd)) {
4242 res = -EIO;
4243 goto errout;
4244 }
4245 if ((brightness_mode & 1) &&
4246 !acpi_ec_write(brightness_offset, i + inc)) {
4247 res = -EIO;
4248 goto errout;;
4249 }
4250 }
4251
4252 errout:
4253 mutex_unlock(&brightness_mutex);
4254 return res;
4255 }
4256
4257 /* sysfs backlight class ----------------------------------------------- */
4258
4259 static int brightness_update_status(struct backlight_device *bd)
4260 {
4261 /* it is the backlight class's job (caller) to handle
4262 * EINTR and other errors properly */
4263 return brightness_set(
4264 (bd->props.fb_blank == FB_BLANK_UNBLANK &&
4265 bd->props.power == FB_BLANK_UNBLANK) ?
4266 bd->props.brightness : 0);
4267 }
4268
4269 static struct backlight_ops ibm_backlight_data = {
4270 .get_brightness = brightness_get,
4271 .update_status = brightness_update_status,
4272 };
4273
4274 /* --------------------------------------------------------------------- */
4275
4276 static int __init tpacpi_query_bcll_levels(acpi_handle handle)
4277 {
4278 struct acpi_buffer buffer = { ACPI_ALLOCATE_BUFFER, NULL };
4279 union acpi_object *obj;
4280 int rc;
4281
4282 if (ACPI_SUCCESS(acpi_evaluate_object(handle, NULL, NULL, &buffer))) {
4283 obj = (union acpi_object *)buffer.pointer;
4284 if (!obj || (obj->type != ACPI_TYPE_PACKAGE)) {
4285 printk(TPACPI_ERR "Unknown BCLL data, "
4286 "please report this to %s\n", TPACPI_MAIL);
4287 rc = 0;
4288 } else {
4289 rc = obj->package.count;
4290 }
4291 } else {
4292 return 0;
4293 }
4294
4295 kfree(buffer.pointer);
4296 return rc;
4297 }
4298
4299 static acpi_status __init brightness_find_bcll(acpi_handle handle, u32 lvl,
4300 void *context, void **rv)
4301 {
4302 char name[ACPI_PATH_SEGMENT_LENGTH];
4303 struct acpi_buffer buffer = { sizeof(name), &name };
4304
4305 if (ACPI_SUCCESS(acpi_get_name(handle, ACPI_SINGLE_NAME, &buffer)) &&
4306 !strncmp("BCLL", name, sizeof(name) - 1)) {
4307 if (tpacpi_query_bcll_levels(handle) == 16) {
4308 *rv = handle;
4309 return AE_CTRL_TERMINATE;
4310 } else {
4311 return AE_OK;
4312 }
4313 } else {
4314 return AE_OK;
4315 }
4316 }
4317
4318 static int __init brightness_check_levels(void)
4319 {
4320 int status;
4321 void *found_node = NULL;
4322
4323 if (!vid_handle) {
4324 TPACPI_ACPIHANDLE_INIT(vid);
4325 }
4326 if (!vid_handle)
4327 return 0;
4328
4329 /* Search for a BCLL package with 16 levels */
4330 status = acpi_walk_namespace(ACPI_TYPE_PACKAGE, vid_handle, 3,
4331 brightness_find_bcll, NULL,
4332 &found_node);
4333
4334 return (ACPI_SUCCESS(status) && found_node != NULL);
4335 }
4336
4337 static acpi_status __init brightness_find_bcl(acpi_handle handle, u32 lvl,
4338 void *context, void **rv)
4339 {
4340 char name[ACPI_PATH_SEGMENT_LENGTH];
4341 struct acpi_buffer buffer = { sizeof(name), &name };
4342
4343 if (ACPI_SUCCESS(acpi_get_name(handle, ACPI_SINGLE_NAME, &buffer)) &&
4344 !strncmp("_BCL", name, sizeof(name) - 1)) {
4345 *rv = handle;
4346 return AE_CTRL_TERMINATE;
4347 } else {
4348 return AE_OK;
4349 }
4350 }
4351
4352 static int __init brightness_check_std_acpi_support(void)
4353 {
4354 int status;
4355 void *found_node = NULL;
4356
4357 if (!vid_handle) {
4358 TPACPI_ACPIHANDLE_INIT(vid);
4359 }
4360 if (!vid_handle)
4361 return 0;
4362
4363 /* Search for a _BCL method, but don't execute it */
4364 status = acpi_walk_namespace(ACPI_TYPE_METHOD, vid_handle, 3,
4365 brightness_find_bcl, NULL, &found_node);
4366
4367 return (ACPI_SUCCESS(status) && found_node != NULL);
4368 }
4369
4370 static int __init brightness_init(struct ibm_init_struct *iibm)
4371 {
4372 int b;
4373
4374 vdbg_printk(TPACPI_DBG_INIT, "initializing brightness subdriver\n");
4375
4376 mutex_init(&brightness_mutex);
4377
4378 if (!brightness_enable) {
4379 dbg_printk(TPACPI_DBG_INIT,
4380 "brightness support disabled by "
4381 "module parameter\n");
4382 return 1;
4383 } else if (brightness_enable > 1) {
4384 if (brightness_check_std_acpi_support()) {
4385 printk(TPACPI_NOTICE
4386 "standard ACPI backlight interface "
4387 "available, not loading native one...\n");
4388 return 1;
4389 }
4390 }
4391
4392 if (!brightness_mode) {
4393 if (thinkpad_id.vendor == PCI_VENDOR_ID_LENOVO)
4394 brightness_mode = 2;
4395 else
4396 brightness_mode = 3;
4397
4398 dbg_printk(TPACPI_DBG_INIT, "selected brightness_mode=%d\n",
4399 brightness_mode);
4400 }
4401
4402 if (brightness_mode > 3)
4403 return -EINVAL;
4404
4405 tp_features.bright_16levels =
4406 thinkpad_id.vendor == PCI_VENDOR_ID_LENOVO &&
4407 brightness_check_levels();
4408
4409 b = brightness_get(NULL);
4410 if (b < 0)
4411 return 1;
4412
4413 if (tp_features.bright_16levels)
4414 printk(TPACPI_INFO
4415 "detected a 16-level brightness capable ThinkPad\n");
4416
4417 ibm_backlight_device = backlight_device_register(
4418 TPACPI_BACKLIGHT_DEV_NAME, NULL, NULL,
4419 &ibm_backlight_data);
4420 if (IS_ERR(ibm_backlight_device)) {
4421 printk(TPACPI_ERR "Could not register backlight device\n");
4422 return PTR_ERR(ibm_backlight_device);
4423 }
4424 vdbg_printk(TPACPI_DBG_INIT, "brightness is supported\n");
4425
4426 ibm_backlight_device->props.max_brightness =
4427 (tp_features.bright_16levels)? 15 : 7;
4428 ibm_backlight_device->props.brightness = b;
4429 backlight_update_status(ibm_backlight_device);
4430
4431 return 0;
4432 }
4433
4434 static void brightness_exit(void)
4435 {
4436 if (ibm_backlight_device) {
4437 vdbg_printk(TPACPI_DBG_EXIT,
4438 "calling backlight_device_unregister()\n");
4439 backlight_device_unregister(ibm_backlight_device);
4440 ibm_backlight_device = NULL;
4441 }
4442 }
4443
4444 static int brightness_read(char *p)
4445 {
4446 int len = 0;
4447 int level;
4448
4449 level = brightness_get(NULL);
4450 if (level < 0) {
4451 len += sprintf(p + len, "level:\t\tunreadable\n");
4452 } else {
4453 len += sprintf(p + len, "level:\t\t%d\n", level);
4454 len += sprintf(p + len, "commands:\tup, down\n");
4455 len += sprintf(p + len, "commands:\tlevel <level>"
4456 " (<level> is 0-%d)\n",
4457 (tp_features.bright_16levels) ? 15 : 7);
4458 }
4459
4460 return len;
4461 }
4462
4463 static int brightness_write(char *buf)
4464 {
4465 int level;
4466 int rc;
4467 char *cmd;
4468 int max_level = (tp_features.bright_16levels) ? 15 : 7;
4469
4470 level = brightness_get(NULL);
4471 if (level < 0)
4472 return level;
4473
4474 while ((cmd = next_cmd(&buf))) {
4475 if (strlencmp(cmd, "up") == 0) {
4476 if (level < max_level)
4477 level++;
4478 } else if (strlencmp(cmd, "down") == 0) {
4479 if (level > 0)
4480 level--;
4481 } else if (sscanf(cmd, "level %d", &level) == 1 &&
4482 level >= 0 && level <= max_level) {
4483 /* new level set */
4484 } else
4485 return -EINVAL;
4486 }
4487
4488 /*
4489 * Now we know what the final level should be, so we try to set it.
4490 * Doing it this way makes the syscall restartable in case of EINTR
4491 */
4492 rc = brightness_set(level);
4493 return (rc == -EINTR)? ERESTARTSYS : rc;
4494 }
4495
4496 static struct ibm_struct brightness_driver_data = {
4497 .name = "brightness",
4498 .read = brightness_read,
4499 .write = brightness_write,
4500 .exit = brightness_exit,
4501 };
4502
4503 /*************************************************************************
4504 * Volume subdriver
4505 */
4506
4507 static int volume_offset = 0x30;
4508
4509 static int volume_read(char *p)
4510 {
4511 int len = 0;
4512 u8 level;
4513
4514 if (!acpi_ec_read(volume_offset, &level)) {
4515 len += sprintf(p + len, "level:\t\tunreadable\n");
4516 } else {
4517 len += sprintf(p + len, "level:\t\t%d\n", level & 0xf);
4518 len += sprintf(p + len, "mute:\t\t%s\n", onoff(level, 6));
4519 len += sprintf(p + len, "commands:\tup, down, mute\n");
4520 len += sprintf(p + len, "commands:\tlevel <level>"
4521 " (<level> is 0-15)\n");
4522 }
4523
4524 return len;
4525 }
4526
4527 static int volume_write(char *buf)
4528 {
4529 int cmos_cmd, inc, i;
4530 u8 level, mute;
4531 int new_level, new_mute;
4532 char *cmd;
4533
4534 while ((cmd = next_cmd(&buf))) {
4535 if (!acpi_ec_read(volume_offset, &level))
4536 return -EIO;
4537 new_mute = mute = level & 0x40;
4538 new_level = level = level & 0xf;
4539
4540 if (strlencmp(cmd, "up") == 0) {
4541 if (mute)
4542 new_mute = 0;
4543 else
4544 new_level = level == 15 ? 15 : level + 1;
4545 } else if (strlencmp(cmd, "down") == 0) {
4546 if (mute)
4547 new_mute = 0;
4548 else
4549 new_level = level == 0 ? 0 : level - 1;
4550 } else if (sscanf(cmd, "level %d", &new_level) == 1 &&
4551 new_level >= 0 && new_level <= 15) {
4552 /* new_level set */
4553 } else if (strlencmp(cmd, "mute") == 0) {
4554 new_mute = 0x40;
4555 } else
4556 return -EINVAL;
4557
4558 if (new_level != level) {
4559 /* mute doesn't change */
4560
4561 cmos_cmd = (new_level > level) ?
4562 TP_CMOS_VOLUME_UP : TP_CMOS_VOLUME_DOWN;
4563 inc = new_level > level ? 1 : -1;
4564
4565 if (mute && (issue_thinkpad_cmos_command(cmos_cmd) ||
4566 !acpi_ec_write(volume_offset, level)))
4567 return -EIO;
4568
4569 for (i = level; i != new_level; i += inc)
4570 if (issue_thinkpad_cmos_command(cmos_cmd) ||
4571 !acpi_ec_write(volume_offset, i + inc))
4572 return -EIO;
4573
4574 if (mute &&
4575 (issue_thinkpad_cmos_command(TP_CMOS_VOLUME_MUTE) ||
4576 !acpi_ec_write(volume_offset, new_level + mute))) {
4577 return -EIO;
4578 }
4579 }
4580
4581 if (new_mute != mute) {
4582 /* level doesn't change */
4583
4584 cmos_cmd = (new_mute) ?
4585 TP_CMOS_VOLUME_MUTE : TP_CMOS_VOLUME_UP;
4586
4587 if (issue_thinkpad_cmos_command(cmos_cmd) ||
4588 !acpi_ec_write(volume_offset, level + new_mute))
4589 return -EIO;
4590 }
4591 }
4592
4593 return 0;
4594 }
4595
4596 static struct ibm_struct volume_driver_data = {
4597 .name = "volume",
4598 .read = volume_read,
4599 .write = volume_write,
4600 };
4601
4602 /*************************************************************************
4603 * Fan subdriver
4604 */
4605
4606 /*
4607 * FAN ACCESS MODES
4608 *
4609 * TPACPI_FAN_RD_ACPI_GFAN:
4610 * ACPI GFAN method: returns fan level
4611 *
4612 * see TPACPI_FAN_WR_ACPI_SFAN
4613 * EC 0x2f (HFSP) not available if GFAN exists
4614 *
4615 * TPACPI_FAN_WR_ACPI_SFAN:
4616 * ACPI SFAN method: sets fan level, 0 (stop) to 7 (max)
4617 *
4618 * EC 0x2f (HFSP) might be available *for reading*, but do not use
4619 * it for writing.
4620 *
4621 * TPACPI_FAN_WR_TPEC:
4622 * ThinkPad EC register 0x2f (HFSP): fan control loop mode
4623 * Supported on almost all ThinkPads
4624 *
4625 * Fan speed changes of any sort (including those caused by the
4626 * disengaged mode) are usually done slowly by the firmware as the
4627 * maximum ammount of fan duty cycle change per second seems to be
4628 * limited.
4629 *
4630 * Reading is not available if GFAN exists.
4631 * Writing is not available if SFAN exists.
4632 *
4633 * Bits
4634 * 7 automatic mode engaged;
4635 * (default operation mode of the ThinkPad)
4636 * fan level is ignored in this mode.
4637 * 6 full speed mode (takes precedence over bit 7);
4638 * not available on all thinkpads. May disable
4639 * the tachometer while the fan controller ramps up
4640 * the speed (which can take up to a few *minutes*).
4641 * Speeds up fan to 100% duty-cycle, which is far above
4642 * the standard RPM levels. It is not impossible that
4643 * it could cause hardware damage.
4644 * 5-3 unused in some models. Extra bits for fan level
4645 * in others, but still useless as all values above
4646 * 7 map to the same speed as level 7 in these models.
4647 * 2-0 fan level (0..7 usually)
4648 * 0x00 = stop
4649 * 0x07 = max (set when temperatures critical)
4650 * Some ThinkPads may have other levels, see
4651 * TPACPI_FAN_WR_ACPI_FANS (X31/X40/X41)
4652 *
4653 * FIRMWARE BUG: on some models, EC 0x2f might not be initialized at
4654 * boot. Apparently the EC does not intialize it, so unless ACPI DSDT
4655 * does so, its initial value is meaningless (0x07).
4656 *
4657 * For firmware bugs, refer to:
4658 * http://thinkwiki.org/wiki/Embedded_Controller_Firmware#Firmware_Issues
4659 *
4660 * ----
4661 *
4662 * ThinkPad EC register 0x84 (LSB), 0x85 (MSB):
4663 * Main fan tachometer reading (in RPM)
4664 *
4665 * This register is present on all ThinkPads with a new-style EC, and
4666 * it is known not to be present on the A21m/e, and T22, as there is
4667 * something else in offset 0x84 according to the ACPI DSDT. Other
4668 * ThinkPads from this same time period (and earlier) probably lack the
4669 * tachometer as well.
4670 *
4671 * Unfortunately a lot of ThinkPads with new-style ECs but whose firwmare
4672 * was never fixed by IBM to report the EC firmware version string
4673 * probably support the tachometer (like the early X models), so
4674 * detecting it is quite hard. We need more data to know for sure.
4675 *
4676 * FIRMWARE BUG: always read 0x84 first, otherwise incorrect readings
4677 * might result.
4678 *
4679 * FIRMWARE BUG: may go stale while the EC is switching to full speed
4680 * mode.
4681 *
4682 * For firmware bugs, refer to:
4683 * http://thinkwiki.org/wiki/Embedded_Controller_Firmware#Firmware_Issues
4684 *
4685 * TPACPI_FAN_WR_ACPI_FANS:
4686 * ThinkPad X31, X40, X41. Not available in the X60.
4687 *
4688 * FANS ACPI handle: takes three arguments: low speed, medium speed,
4689 * high speed. ACPI DSDT seems to map these three speeds to levels
4690 * as follows: STOP LOW LOW MED MED HIGH HIGH HIGH HIGH
4691 * (this map is stored on FAN0..FAN8 as "0,1,1,2,2,3,3,3,3")
4692 *
4693 * The speeds are stored on handles
4694 * (FANA:FAN9), (FANC:FANB), (FANE:FAND).
4695 *
4696 * There are three default speed sets, acessible as handles:
4697 * FS1L,FS1M,FS1H; FS2L,FS2M,FS2H; FS3L,FS3M,FS3H
4698 *
4699 * ACPI DSDT switches which set is in use depending on various
4700 * factors.
4701 *
4702 * TPACPI_FAN_WR_TPEC is also available and should be used to
4703 * command the fan. The X31/X40/X41 seems to have 8 fan levels,
4704 * but the ACPI tables just mention level 7.
4705 */
4706
4707 enum { /* Fan control constants */
4708 fan_status_offset = 0x2f, /* EC register 0x2f */
4709 fan_rpm_offset = 0x84, /* EC register 0x84: LSB, 0x85 MSB (RPM)
4710 * 0x84 must be read before 0x85 */
4711
4712 TP_EC_FAN_FULLSPEED = 0x40, /* EC fan mode: full speed */
4713 TP_EC_FAN_AUTO = 0x80, /* EC fan mode: auto fan control */
4714
4715 TPACPI_FAN_LAST_LEVEL = 0x100, /* Use cached last-seen fan level */
4716 };
4717
4718 enum fan_status_access_mode {
4719 TPACPI_FAN_NONE = 0, /* No fan status or control */
4720 TPACPI_FAN_RD_ACPI_GFAN, /* Use ACPI GFAN */
4721 TPACPI_FAN_RD_TPEC, /* Use ACPI EC regs 0x2f, 0x84-0x85 */
4722 };
4723
4724 enum fan_control_access_mode {
4725 TPACPI_FAN_WR_NONE = 0, /* No fan control */
4726 TPACPI_FAN_WR_ACPI_SFAN, /* Use ACPI SFAN */
4727 TPACPI_FAN_WR_TPEC, /* Use ACPI EC reg 0x2f */
4728 TPACPI_FAN_WR_ACPI_FANS, /* Use ACPI FANS and EC reg 0x2f */
4729 };
4730
4731 enum fan_control_commands {
4732 TPACPI_FAN_CMD_SPEED = 0x0001, /* speed command */
4733 TPACPI_FAN_CMD_LEVEL = 0x0002, /* level command */
4734 TPACPI_FAN_CMD_ENABLE = 0x0004, /* enable/disable cmd,
4735 * and also watchdog cmd */
4736 };
4737
4738 static int fan_control_allowed;
4739
4740 static enum fan_status_access_mode fan_status_access_mode;
4741 static enum fan_control_access_mode fan_control_access_mode;
4742 static enum fan_control_commands fan_control_commands;
4743
4744 static u8 fan_control_initial_status;
4745 static u8 fan_control_desired_level;
4746 static int fan_watchdog_maxinterval;
4747
4748 static struct mutex fan_mutex;
4749
4750 static void fan_watchdog_fire(struct work_struct *ignored);
4751 static DECLARE_DELAYED_WORK(fan_watchdog_task, fan_watchdog_fire);
4752
4753 TPACPI_HANDLE(fans, ec, "FANS"); /* X31, X40, X41 */
4754 TPACPI_HANDLE(gfan, ec, "GFAN", /* 570 */
4755 "\\FSPD", /* 600e/x, 770e, 770x */
4756 ); /* all others */
4757 TPACPI_HANDLE(sfan, ec, "SFAN", /* 570 */
4758 "JFNS", /* 770x-JL */
4759 ); /* all others */
4760
4761 /*
4762 * Call with fan_mutex held
4763 */
4764 static void fan_update_desired_level(u8 status)
4765 {
4766 if ((status &
4767 (TP_EC_FAN_AUTO | TP_EC_FAN_FULLSPEED)) == 0) {
4768 if (status > 7)
4769 fan_control_desired_level = 7;
4770 else
4771 fan_control_desired_level = status;
4772 }
4773 }
4774
4775 static int fan_get_status(u8 *status)
4776 {
4777 u8 s;
4778
4779 /* TODO:
4780 * Add TPACPI_FAN_RD_ACPI_FANS ? */
4781
4782 switch (fan_status_access_mode) {
4783 case TPACPI_FAN_RD_ACPI_GFAN:
4784 /* 570, 600e/x, 770e, 770x */
4785
4786 if (unlikely(!acpi_evalf(gfan_handle, &s, NULL, "d")))
4787 return -EIO;
4788
4789 if (likely(status))
4790 *status = s & 0x07;
4791
4792 break;
4793
4794 case TPACPI_FAN_RD_TPEC:
4795 /* all except 570, 600e/x, 770e, 770x */
4796 if (unlikely(!acpi_ec_read(fan_status_offset, &s)))
4797 return -EIO;
4798
4799 if (likely(status))
4800 *status = s;
4801
4802 break;
4803
4804 default:
4805 return -ENXIO;
4806 }
4807
4808 return 0;
4809 }
4810
4811 static int fan_get_status_safe(u8 *status)
4812 {
4813 int rc;
4814 u8 s;
4815
4816 if (mutex_lock_interruptible(&fan_mutex))
4817 return -ERESTARTSYS;
4818 rc = fan_get_status(&s);
4819 if (!rc)
4820 fan_update_desired_level(s);
4821 mutex_unlock(&fan_mutex);
4822
4823 if (status)
4824 *status = s;
4825
4826 return rc;
4827 }
4828
4829 static int fan_get_speed(unsigned int *speed)
4830 {
4831 u8 hi, lo;
4832
4833 switch (fan_status_access_mode) {
4834 case TPACPI_FAN_RD_TPEC:
4835 /* all except 570, 600e/x, 770e, 770x */
4836 if (unlikely(!acpi_ec_read(fan_rpm_offset, &lo) ||
4837 !acpi_ec_read(fan_rpm_offset + 1, &hi)))
4838 return -EIO;
4839
4840 if (likely(speed))
4841 *speed = (hi << 8) | lo;
4842
4843 break;
4844
4845 default:
4846 return -ENXIO;
4847 }
4848
4849 return 0;
4850 }
4851
4852 static int fan_set_level(int level)
4853 {
4854 if (!fan_control_allowed)
4855 return -EPERM;
4856
4857 switch (fan_control_access_mode) {
4858 case TPACPI_FAN_WR_ACPI_SFAN:
4859 if (level >= 0 && level <= 7) {
4860 if (!acpi_evalf(sfan_handle, NULL, NULL, "vd", level))
4861 return -EIO;
4862 } else
4863 return -EINVAL;
4864 break;
4865
4866 case TPACPI_FAN_WR_ACPI_FANS:
4867 case TPACPI_FAN_WR_TPEC:
4868 if ((level != TP_EC_FAN_AUTO) &&
4869 (level != TP_EC_FAN_FULLSPEED) &&
4870 ((level < 0) || (level > 7)))
4871 return -EINVAL;
4872
4873 /* safety net should the EC not support AUTO
4874 * or FULLSPEED mode bits and just ignore them */
4875 if (level & TP_EC_FAN_FULLSPEED)
4876 level |= 7; /* safety min speed 7 */
4877 else if (level & TP_EC_FAN_AUTO)
4878 level |= 4; /* safety min speed 4 */
4879
4880 if (!acpi_ec_write(fan_status_offset, level))
4881 return -EIO;
4882 else
4883 tp_features.fan_ctrl_status_undef = 0;
4884 break;
4885
4886 default:
4887 return -ENXIO;
4888 }
4889 return 0;
4890 }
4891
4892 static int fan_set_level_safe(int level)
4893 {
4894 int rc;
4895
4896 if (!fan_control_allowed)
4897 return -EPERM;
4898
4899 if (mutex_lock_interruptible(&fan_mutex))
4900 return -ERESTARTSYS;
4901
4902 if (level == TPACPI_FAN_LAST_LEVEL)
4903 level = fan_control_desired_level;
4904
4905 rc = fan_set_level(level);
4906 if (!rc)
4907 fan_update_desired_level(level);
4908
4909 mutex_unlock(&fan_mutex);
4910 return rc;
4911 }
4912
4913 static int fan_set_enable(void)
4914 {
4915 u8 s;
4916 int rc;
4917
4918 if (!fan_control_allowed)
4919 return -EPERM;
4920
4921 if (mutex_lock_interruptible(&fan_mutex))
4922 return -ERESTARTSYS;
4923
4924 switch (fan_control_access_mode) {
4925 case TPACPI_FAN_WR_ACPI_FANS:
4926 case TPACPI_FAN_WR_TPEC:
4927 rc = fan_get_status(&s);
4928 if (rc < 0)
4929 break;
4930
4931 /* Don't go out of emergency fan mode */
4932 if (s != 7) {
4933 s &= 0x07;
4934 s |= TP_EC_FAN_AUTO | 4; /* min fan speed 4 */
4935 }
4936
4937 if (!acpi_ec_write(fan_status_offset, s))
4938 rc = -EIO;
4939 else {
4940 tp_features.fan_ctrl_status_undef = 0;
4941 rc = 0;
4942 }
4943 break;
4944
4945 case TPACPI_FAN_WR_ACPI_SFAN:
4946 rc = fan_get_status(&s);
4947 if (rc < 0)
4948 break;
4949
4950 s &= 0x07;
4951
4952 /* Set fan to at least level 4 */
4953 s |= 4;
4954
4955 if (!acpi_evalf(sfan_handle, NULL, NULL, "vd", s))
4956 rc = -EIO;
4957 else
4958 rc = 0;
4959 break;
4960
4961 default:
4962 rc = -ENXIO;
4963 }
4964
4965 mutex_unlock(&fan_mutex);
4966 return rc;
4967 }
4968
4969 static int fan_set_disable(void)
4970 {
4971 int rc;
4972
4973 if (!fan_control_allowed)
4974 return -EPERM;
4975
4976 if (mutex_lock_interruptible(&fan_mutex))
4977 return -ERESTARTSYS;
4978
4979 rc = 0;
4980 switch (fan_control_access_mode) {
4981 case TPACPI_FAN_WR_ACPI_FANS:
4982 case TPACPI_FAN_WR_TPEC:
4983 if (!acpi_ec_write(fan_status_offset, 0x00))
4984 rc = -EIO;
4985 else {
4986 fan_control_desired_level = 0;
4987 tp_features.fan_ctrl_status_undef = 0;
4988 }
4989 break;
4990
4991 case TPACPI_FAN_WR_ACPI_SFAN:
4992 if (!acpi_evalf(sfan_handle, NULL, NULL, "vd", 0x00))
4993 rc = -EIO;
4994 else
4995 fan_control_desired_level = 0;
4996 break;
4997
4998 default:
4999 rc = -ENXIO;
5000 }
5001
5002
5003 mutex_unlock(&fan_mutex);
5004 return rc;
5005 }
5006
5007 static int fan_set_speed(int speed)
5008 {
5009 int rc;
5010
5011 if (!fan_control_allowed)
5012 return -EPERM;
5013
5014 if (mutex_lock_interruptible(&fan_mutex))
5015 return -ERESTARTSYS;
5016
5017 rc = 0;
5018 switch (fan_control_access_mode) {
5019 case TPACPI_FAN_WR_ACPI_FANS:
5020 if (speed >= 0 && speed <= 65535) {
5021 if (!acpi_evalf(fans_handle, NULL, NULL, "vddd",
5022 speed, speed, speed))
5023 rc = -EIO;
5024 } else
5025 rc = -EINVAL;
5026 break;
5027
5028 default:
5029 rc = -ENXIO;
5030 }
5031
5032 mutex_unlock(&fan_mutex);
5033 return rc;
5034 }
5035
5036 static void fan_watchdog_reset(void)
5037 {
5038 static int fan_watchdog_active;
5039
5040 if (fan_control_access_mode == TPACPI_FAN_WR_NONE)
5041 return;
5042
5043 if (fan_watchdog_active)
5044 cancel_delayed_work(&fan_watchdog_task);
5045
5046 if (fan_watchdog_maxinterval > 0 &&
5047 tpacpi_lifecycle != TPACPI_LIFE_EXITING) {
5048 fan_watchdog_active = 1;
5049 if (!schedule_delayed_work(&fan_watchdog_task,
5050 msecs_to_jiffies(fan_watchdog_maxinterval
5051 * 1000))) {
5052 printk(TPACPI_ERR
5053 "failed to schedule the fan watchdog, "
5054 "watchdog will not trigger\n");
5055 }
5056 } else
5057 fan_watchdog_active = 0;
5058 }
5059
5060 static void fan_watchdog_fire(struct work_struct *ignored)
5061 {
5062 int rc;
5063
5064 if (tpacpi_lifecycle != TPACPI_LIFE_RUNNING)
5065 return;
5066
5067 printk(TPACPI_NOTICE "fan watchdog: enabling fan\n");
5068 rc = fan_set_enable();
5069 if (rc < 0) {
5070 printk(TPACPI_ERR "fan watchdog: error %d while enabling fan, "
5071 "will try again later...\n", -rc);
5072 /* reschedule for later */
5073 fan_watchdog_reset();
5074 }
5075 }
5076
5077 /*
5078 * SYSFS fan layout: hwmon compatible (device)
5079 *
5080 * pwm*_enable:
5081 * 0: "disengaged" mode
5082 * 1: manual mode
5083 * 2: native EC "auto" mode (recommended, hardware default)
5084 *
5085 * pwm*: set speed in manual mode, ignored otherwise.
5086 * 0 is level 0; 255 is level 7. Intermediate points done with linear
5087 * interpolation.
5088 *
5089 * fan*_input: tachometer reading, RPM
5090 *
5091 *
5092 * SYSFS fan layout: extensions
5093 *
5094 * fan_watchdog (driver):
5095 * fan watchdog interval in seconds, 0 disables (default), max 120
5096 */
5097
5098 /* sysfs fan pwm1_enable ----------------------------------------------- */
5099 static ssize_t fan_pwm1_enable_show(struct device *dev,
5100 struct device_attribute *attr,
5101 char *buf)
5102 {
5103 int res, mode;
5104 u8 status;
5105
5106 res = fan_get_status_safe(&status);
5107 if (res)
5108 return res;
5109
5110 if (unlikely(tp_features.fan_ctrl_status_undef)) {
5111 if (status != fan_control_initial_status) {
5112 tp_features.fan_ctrl_status_undef = 0;
5113 } else {
5114 /* Return most likely status. In fact, it
5115 * might be the only possible status */
5116 status = TP_EC_FAN_AUTO;
5117 }
5118 }
5119
5120 if (status & TP_EC_FAN_FULLSPEED) {
5121 mode = 0;
5122 } else if (status & TP_EC_FAN_AUTO) {
5123 mode = 2;
5124 } else
5125 mode = 1;
5126
5127 return snprintf(buf, PAGE_SIZE, "%d\n", mode);
5128 }
5129
5130 static ssize_t fan_pwm1_enable_store(struct device *dev,
5131 struct device_attribute *attr,
5132 const char *buf, size_t count)
5133 {
5134 unsigned long t;
5135 int res, level;
5136
5137 if (parse_strtoul(buf, 2, &t))
5138 return -EINVAL;
5139
5140 switch (t) {
5141 case 0:
5142 level = TP_EC_FAN_FULLSPEED;
5143 break;
5144 case 1:
5145 level = TPACPI_FAN_LAST_LEVEL;
5146 break;
5147 case 2:
5148 level = TP_EC_FAN_AUTO;
5149 break;
5150 case 3:
5151 /* reserved for software-controlled auto mode */
5152 return -ENOSYS;
5153 default:
5154 return -EINVAL;
5155 }
5156
5157 res = fan_set_level_safe(level);
5158 if (res == -ENXIO)
5159 return -EINVAL;
5160 else if (res < 0)
5161 return res;
5162
5163 fan_watchdog_reset();
5164
5165 return count;
5166 }
5167
5168 static struct device_attribute dev_attr_fan_pwm1_enable =
5169 __ATTR(pwm1_enable, S_IWUSR | S_IRUGO,
5170 fan_pwm1_enable_show, fan_pwm1_enable_store);
5171
5172 /* sysfs fan pwm1 ------------------------------------------------------ */
5173 static ssize_t fan_pwm1_show(struct device *dev,
5174 struct device_attribute *attr,
5175 char *buf)
5176 {
5177 int res;
5178 u8 status;
5179
5180 res = fan_get_status_safe(&status);
5181 if (res)
5182 return res;
5183
5184 if (unlikely(tp_features.fan_ctrl_status_undef)) {
5185 if (status != fan_control_initial_status) {
5186 tp_features.fan_ctrl_status_undef = 0;
5187 } else {
5188 status = TP_EC_FAN_AUTO;
5189 }
5190 }
5191
5192 if ((status &
5193 (TP_EC_FAN_AUTO | TP_EC_FAN_FULLSPEED)) != 0)
5194 status = fan_control_desired_level;
5195
5196 if (status > 7)
5197 status = 7;
5198
5199 return snprintf(buf, PAGE_SIZE, "%u\n", (status * 255) / 7);
5200 }
5201
5202 static ssize_t fan_pwm1_store(struct device *dev,
5203 struct device_attribute *attr,
5204 const char *buf, size_t count)
5205 {
5206 unsigned long s;
5207 int rc;
5208 u8 status, newlevel;
5209
5210 if (parse_strtoul(buf, 255, &s))
5211 return -EINVAL;
5212
5213 /* scale down from 0-255 to 0-7 */
5214 newlevel = (s >> 5) & 0x07;
5215
5216 if (mutex_lock_interruptible(&fan_mutex))
5217 return -ERESTARTSYS;
5218
5219 rc = fan_get_status(&status);
5220 if (!rc && (status &
5221 (TP_EC_FAN_AUTO | TP_EC_FAN_FULLSPEED)) == 0) {
5222 rc = fan_set_level(newlevel);
5223 if (rc == -ENXIO)
5224 rc = -EINVAL;
5225 else if (!rc) {
5226 fan_update_desired_level(newlevel);
5227 fan_watchdog_reset();
5228 }
5229 }
5230
5231 mutex_unlock(&fan_mutex);
5232 return (rc)? rc : count;
5233 }
5234
5235 static struct device_attribute dev_attr_fan_pwm1 =
5236 __ATTR(pwm1, S_IWUSR | S_IRUGO,
5237 fan_pwm1_show, fan_pwm1_store);
5238
5239 /* sysfs fan fan1_input ------------------------------------------------ */
5240 static ssize_t fan_fan1_input_show(struct device *dev,
5241 struct device_attribute *attr,
5242 char *buf)
5243 {
5244 int res;
5245 unsigned int speed;
5246
5247 res = fan_get_speed(&speed);
5248 if (res < 0)
5249 return res;
5250
5251 return snprintf(buf, PAGE_SIZE, "%u\n", speed);
5252 }
5253
5254 static struct device_attribute dev_attr_fan_fan1_input =
5255 __ATTR(fan1_input, S_IRUGO,
5256 fan_fan1_input_show, NULL);
5257
5258 /* sysfs fan fan_watchdog (hwmon driver) ------------------------------- */
5259 static ssize_t fan_fan_watchdog_show(struct device_driver *drv,
5260 char *buf)
5261 {
5262 return snprintf(buf, PAGE_SIZE, "%u\n", fan_watchdog_maxinterval);
5263 }
5264
5265 static ssize_t fan_fan_watchdog_store(struct device_driver *drv,
5266 const char *buf, size_t count)
5267 {
5268 unsigned long t;
5269
5270 if (parse_strtoul(buf, 120, &t))
5271 return -EINVAL;
5272
5273 if (!fan_control_allowed)
5274 return -EPERM;
5275
5276 fan_watchdog_maxinterval = t;
5277 fan_watchdog_reset();
5278
5279 return count;
5280 }
5281
5282 static DRIVER_ATTR(fan_watchdog, S_IWUSR | S_IRUGO,
5283 fan_fan_watchdog_show, fan_fan_watchdog_store);
5284
5285 /* --------------------------------------------------------------------- */
5286 static struct attribute *fan_attributes[] = {
5287 &dev_attr_fan_pwm1_enable.attr, &dev_attr_fan_pwm1.attr,
5288 &dev_attr_fan_fan1_input.attr,
5289 NULL
5290 };
5291
5292 static const struct attribute_group fan_attr_group = {
5293 .attrs = fan_attributes,
5294 };
5295
5296 static int __init fan_init(struct ibm_init_struct *iibm)
5297 {
5298 int rc;
5299
5300 vdbg_printk(TPACPI_DBG_INIT, "initializing fan subdriver\n");
5301
5302 mutex_init(&fan_mutex);
5303 fan_status_access_mode = TPACPI_FAN_NONE;
5304 fan_control_access_mode = TPACPI_FAN_WR_NONE;
5305 fan_control_commands = 0;
5306 fan_watchdog_maxinterval = 0;
5307 tp_features.fan_ctrl_status_undef = 0;
5308 fan_control_desired_level = 7;
5309
5310 TPACPI_ACPIHANDLE_INIT(fans);
5311 TPACPI_ACPIHANDLE_INIT(gfan);
5312 TPACPI_ACPIHANDLE_INIT(sfan);
5313
5314 if (gfan_handle) {
5315 /* 570, 600e/x, 770e, 770x */
5316 fan_status_access_mode = TPACPI_FAN_RD_ACPI_GFAN;
5317 } else {
5318 /* all other ThinkPads: note that even old-style
5319 * ThinkPad ECs supports the fan control register */
5320 if (likely(acpi_ec_read(fan_status_offset,
5321 &fan_control_initial_status))) {
5322 fan_status_access_mode = TPACPI_FAN_RD_TPEC;
5323
5324 /* In some ThinkPads, neither the EC nor the ACPI
5325 * DSDT initialize the fan status, and it ends up
5326 * being set to 0x07 when it *could* be either
5327 * 0x07 or 0x80.
5328 *
5329 * Enable for TP-1Y (T43), TP-78 (R51e),
5330 * TP-76 (R52), TP-70 (T43, R52), which are known
5331 * to be buggy. */
5332 if (fan_control_initial_status == 0x07) {
5333 switch (thinkpad_id.ec_model) {
5334 case 0x5931: /* TP-1Y */
5335 case 0x3837: /* TP-78 */
5336 case 0x3637: /* TP-76 */
5337 case 0x3037: /* TP-70 */
5338 printk(TPACPI_NOTICE
5339 "fan_init: initial fan status "
5340 "is unknown, assuming it is "
5341 "in auto mode\n");
5342 tp_features.fan_ctrl_status_undef = 1;
5343 ;;
5344 }
5345 }
5346 } else {
5347 printk(TPACPI_ERR
5348 "ThinkPad ACPI EC access misbehaving, "
5349 "fan status and control unavailable\n");
5350 return 1;
5351 }
5352 }
5353
5354 if (sfan_handle) {
5355 /* 570, 770x-JL */
5356 fan_control_access_mode = TPACPI_FAN_WR_ACPI_SFAN;
5357 fan_control_commands |=
5358 TPACPI_FAN_CMD_LEVEL | TPACPI_FAN_CMD_ENABLE;
5359 } else {
5360 if (!gfan_handle) {
5361 /* gfan without sfan means no fan control */
5362 /* all other models implement TP EC 0x2f control */
5363
5364 if (fans_handle) {
5365 /* X31, X40, X41 */
5366 fan_control_access_mode =
5367 TPACPI_FAN_WR_ACPI_FANS;
5368 fan_control_commands |=
5369 TPACPI_FAN_CMD_SPEED |
5370 TPACPI_FAN_CMD_LEVEL |
5371 TPACPI_FAN_CMD_ENABLE;
5372 } else {
5373 fan_control_access_mode = TPACPI_FAN_WR_TPEC;
5374 fan_control_commands |=
5375 TPACPI_FAN_CMD_LEVEL |
5376 TPACPI_FAN_CMD_ENABLE;
5377 }
5378 }
5379 }
5380
5381 vdbg_printk(TPACPI_DBG_INIT, "fan is %s, modes %d, %d\n",
5382 str_supported(fan_status_access_mode != TPACPI_FAN_NONE ||
5383 fan_control_access_mode != TPACPI_FAN_WR_NONE),
5384 fan_status_access_mode, fan_control_access_mode);
5385
5386 /* fan control master switch */
5387 if (!fan_control_allowed) {
5388 fan_control_access_mode = TPACPI_FAN_WR_NONE;
5389 fan_control_commands = 0;
5390 dbg_printk(TPACPI_DBG_INIT,
5391 "fan control features disabled by parameter\n");
5392 }
5393
5394 /* update fan_control_desired_level */
5395 if (fan_status_access_mode != TPACPI_FAN_NONE)
5396 fan_get_status_safe(NULL);
5397
5398 if (fan_status_access_mode != TPACPI_FAN_NONE ||
5399 fan_control_access_mode != TPACPI_FAN_WR_NONE) {
5400 rc = sysfs_create_group(&tpacpi_sensors_pdev->dev.kobj,
5401 &fan_attr_group);
5402 if (!(rc < 0))
5403 rc = driver_create_file(&tpacpi_hwmon_pdriver.driver,
5404 &driver_attr_fan_watchdog);
5405 if (rc < 0)
5406 return rc;
5407 return 0;
5408 } else
5409 return 1;
5410 }
5411
5412 static void fan_exit(void)
5413 {
5414 vdbg_printk(TPACPI_DBG_EXIT,
5415 "cancelling any pending fan watchdog tasks\n");
5416
5417 /* FIXME: can we really do this unconditionally? */
5418 sysfs_remove_group(&tpacpi_sensors_pdev->dev.kobj, &fan_attr_group);
5419 driver_remove_file(&tpacpi_hwmon_pdriver.driver,
5420 &driver_attr_fan_watchdog);
5421
5422 cancel_delayed_work(&fan_watchdog_task);
5423 flush_scheduled_work();
5424 }
5425
5426 static int fan_read(char *p)
5427 {
5428 int len = 0;
5429 int rc;
5430 u8 status;
5431 unsigned int speed = 0;
5432
5433 switch (fan_status_access_mode) {
5434 case TPACPI_FAN_RD_ACPI_GFAN:
5435 /* 570, 600e/x, 770e, 770x */
5436 rc = fan_get_status_safe(&status);
5437 if (rc < 0)
5438 return rc;
5439
5440 len += sprintf(p + len, "status:\t\t%s\n"
5441 "level:\t\t%d\n",
5442 (status != 0) ? "enabled" : "disabled", status);
5443 break;
5444
5445 case TPACPI_FAN_RD_TPEC:
5446 /* all except 570, 600e/x, 770e, 770x */
5447 rc = fan_get_status_safe(&status);
5448 if (rc < 0)
5449 return rc;
5450
5451 if (unlikely(tp_features.fan_ctrl_status_undef)) {
5452 if (status != fan_control_initial_status)
5453 tp_features.fan_ctrl_status_undef = 0;
5454 else
5455 /* Return most likely status. In fact, it
5456 * might be the only possible status */
5457 status = TP_EC_FAN_AUTO;
5458 }
5459
5460 len += sprintf(p + len, "status:\t\t%s\n",
5461 (status != 0) ? "enabled" : "disabled");
5462
5463 rc = fan_get_speed(&speed);
5464 if (rc < 0)
5465 return rc;
5466
5467 len += sprintf(p + len, "speed:\t\t%d\n", speed);
5468
5469 if (status & TP_EC_FAN_FULLSPEED)
5470 /* Disengaged mode takes precedence */
5471 len += sprintf(p + len, "level:\t\tdisengaged\n");
5472 else if (status & TP_EC_FAN_AUTO)
5473 len += sprintf(p + len, "level:\t\tauto\n");
5474 else
5475 len += sprintf(p + len, "level:\t\t%d\n", status);
5476 break;
5477
5478 case TPACPI_FAN_NONE:
5479 default:
5480 len += sprintf(p + len, "status:\t\tnot supported\n");
5481 }
5482
5483 if (fan_control_commands & TPACPI_FAN_CMD_LEVEL) {
5484 len += sprintf(p + len, "commands:\tlevel <level>");
5485
5486 switch (fan_control_access_mode) {
5487 case TPACPI_FAN_WR_ACPI_SFAN:
5488 len += sprintf(p + len, " (<level> is 0-7)\n");
5489 break;
5490
5491 default:
5492 len += sprintf(p + len, " (<level> is 0-7, "
5493 "auto, disengaged, full-speed)\n");
5494 break;
5495 }
5496 }
5497
5498 if (fan_control_commands & TPACPI_FAN_CMD_ENABLE)
5499 len += sprintf(p + len, "commands:\tenable, disable\n"
5500 "commands:\twatchdog <timeout> (<timeout> "
5501 "is 0 (off), 1-120 (seconds))\n");
5502
5503 if (fan_control_commands & TPACPI_FAN_CMD_SPEED)
5504 len += sprintf(p + len, "commands:\tspeed <speed>"
5505 " (<speed> is 0-65535)\n");
5506
5507 return len;
5508 }
5509
5510 static int fan_write_cmd_level(const char *cmd, int *rc)
5511 {
5512 int level;
5513
5514 if (strlencmp(cmd, "level auto") == 0)
5515 level = TP_EC_FAN_AUTO;
5516 else if ((strlencmp(cmd, "level disengaged") == 0) |
5517 (strlencmp(cmd, "level full-speed") == 0))
5518 level = TP_EC_FAN_FULLSPEED;
5519 else if (sscanf(cmd, "level %d", &level) != 1)
5520 return 0;
5521
5522 *rc = fan_set_level_safe(level);
5523 if (*rc == -ENXIO)
5524 printk(TPACPI_ERR "level command accepted for unsupported "
5525 "access mode %d", fan_control_access_mode);
5526
5527 return 1;
5528 }
5529
5530 static int fan_write_cmd_enable(const char *cmd, int *rc)
5531 {
5532 if (strlencmp(cmd, "enable") != 0)
5533 return 0;
5534
5535 *rc = fan_set_enable();
5536 if (*rc == -ENXIO)
5537 printk(TPACPI_ERR "enable command accepted for unsupported "
5538 "access mode %d", fan_control_access_mode);
5539
5540 return 1;
5541 }
5542
5543 static int fan_write_cmd_disable(const char *cmd, int *rc)
5544 {
5545 if (strlencmp(cmd, "disable") != 0)
5546 return 0;
5547
5548 *rc = fan_set_disable();
5549 if (*rc == -ENXIO)
5550 printk(TPACPI_ERR "disable command accepted for unsupported "
5551 "access mode %d", fan_control_access_mode);
5552
5553 return 1;
5554 }
5555
5556 static int fan_write_cmd_speed(const char *cmd, int *rc)
5557 {
5558 int speed;
5559
5560 /* TODO:
5561 * Support speed <low> <medium> <high> ? */
5562
5563 if (sscanf(cmd, "speed %d", &speed) != 1)
5564 return 0;
5565
5566 *rc = fan_set_speed(speed);
5567 if (*rc == -ENXIO)
5568 printk(TPACPI_ERR "speed command accepted for unsupported "
5569 "access mode %d", fan_control_access_mode);
5570
5571 return 1;
5572 }
5573
5574 static int fan_write_cmd_watchdog(const char *cmd, int *rc)
5575 {
5576 int interval;
5577
5578 if (sscanf(cmd, "watchdog %d", &interval) != 1)
5579 return 0;
5580
5581 if (interval < 0 || interval > 120)
5582 *rc = -EINVAL;
5583 else
5584 fan_watchdog_maxinterval = interval;
5585
5586 return 1;
5587 }
5588
5589 static int fan_write(char *buf)
5590 {
5591 char *cmd;
5592 int rc = 0;
5593
5594 while (!rc && (cmd = next_cmd(&buf))) {
5595 if (!((fan_control_commands & TPACPI_FAN_CMD_LEVEL) &&
5596 fan_write_cmd_level(cmd, &rc)) &&
5597 !((fan_control_commands & TPACPI_FAN_CMD_ENABLE) &&
5598 (fan_write_cmd_enable(cmd, &rc) ||
5599 fan_write_cmd_disable(cmd, &rc) ||
5600 fan_write_cmd_watchdog(cmd, &rc))) &&
5601 !((fan_control_commands & TPACPI_FAN_CMD_SPEED) &&
5602 fan_write_cmd_speed(cmd, &rc))
5603 )
5604 rc = -EINVAL;
5605 else if (!rc)
5606 fan_watchdog_reset();
5607 }
5608
5609 return rc;
5610 }
5611
5612 static struct ibm_struct fan_driver_data = {
5613 .name = "fan",
5614 .read = fan_read,
5615 .write = fan_write,
5616 .exit = fan_exit,
5617 };
5618
5619 /****************************************************************************
5620 ****************************************************************************
5621 *
5622 * Infrastructure
5623 *
5624 ****************************************************************************
5625 ****************************************************************************/
5626
5627 /* sysfs name ---------------------------------------------------------- */
5628 static ssize_t thinkpad_acpi_pdev_name_show(struct device *dev,
5629 struct device_attribute *attr,
5630 char *buf)
5631 {
5632 return snprintf(buf, PAGE_SIZE, "%s\n", TPACPI_NAME);
5633 }
5634
5635 static struct device_attribute dev_attr_thinkpad_acpi_pdev_name =
5636 __ATTR(name, S_IRUGO, thinkpad_acpi_pdev_name_show, NULL);
5637
5638 /* --------------------------------------------------------------------- */
5639
5640 /* /proc support */
5641 static struct proc_dir_entry *proc_dir;
5642
5643 /*
5644 * Module and infrastructure proble, init and exit handling
5645 */
5646
5647 static int force_load;
5648
5649 #ifdef CONFIG_THINKPAD_ACPI_DEBUG
5650 static const char * __init str_supported(int is_supported)
5651 {
5652 static char text_unsupported[] __initdata = "not supported";
5653
5654 return (is_supported)? &text_unsupported[4] : &text_unsupported[0];
5655 }
5656 #endif /* CONFIG_THINKPAD_ACPI_DEBUG */
5657
5658 static void ibm_exit(struct ibm_struct *ibm)
5659 {
5660 dbg_printk(TPACPI_DBG_EXIT, "removing %s\n", ibm->name);
5661
5662 list_del_init(&ibm->all_drivers);
5663
5664 if (ibm->flags.acpi_notify_installed) {
5665 dbg_printk(TPACPI_DBG_EXIT,
5666 "%s: acpi_remove_notify_handler\n", ibm->name);
5667 BUG_ON(!ibm->acpi);
5668 acpi_remove_notify_handler(*ibm->acpi->handle,
5669 ibm->acpi->type,
5670 dispatch_acpi_notify);
5671 ibm->flags.acpi_notify_installed = 0;
5672 ibm->flags.acpi_notify_installed = 0;
5673 }
5674
5675 if (ibm->flags.proc_created) {
5676 dbg_printk(TPACPI_DBG_EXIT,
5677 "%s: remove_proc_entry\n", ibm->name);
5678 remove_proc_entry(ibm->name, proc_dir);
5679 ibm->flags.proc_created = 0;
5680 }
5681
5682 if (ibm->flags.acpi_driver_registered) {
5683 dbg_printk(TPACPI_DBG_EXIT,
5684 "%s: acpi_bus_unregister_driver\n", ibm->name);
5685 BUG_ON(!ibm->acpi);
5686 acpi_bus_unregister_driver(ibm->acpi->driver);
5687 kfree(ibm->acpi->driver);
5688 ibm->acpi->driver = NULL;
5689 ibm->flags.acpi_driver_registered = 0;
5690 }
5691
5692 if (ibm->flags.init_called && ibm->exit) {
5693 ibm->exit();
5694 ibm->flags.init_called = 0;
5695 }
5696
5697 dbg_printk(TPACPI_DBG_INIT, "finished removing %s\n", ibm->name);
5698 }
5699
5700 static int __init ibm_init(struct ibm_init_struct *iibm)
5701 {
5702 int ret;
5703 struct ibm_struct *ibm = iibm->data;
5704 struct proc_dir_entry *entry;
5705
5706 BUG_ON(ibm == NULL);
5707
5708 INIT_LIST_HEAD(&ibm->all_drivers);
5709
5710 if (ibm->flags.experimental && !experimental)
5711 return 0;
5712
5713 dbg_printk(TPACPI_DBG_INIT,
5714 "probing for %s\n", ibm->name);
5715
5716 if (iibm->init) {
5717 ret = iibm->init(iibm);
5718 if (ret > 0)
5719 return 0; /* probe failed */
5720 if (ret)
5721 return ret;
5722
5723 ibm->flags.init_called = 1;
5724 }
5725
5726 if (ibm->acpi) {
5727 if (ibm->acpi->hid) {
5728 ret = register_tpacpi_subdriver(ibm);
5729 if (ret)
5730 goto err_out;
5731 }
5732
5733 if (ibm->acpi->notify) {
5734 ret = setup_acpi_notify(ibm);
5735 if (ret == -ENODEV) {
5736 printk(TPACPI_NOTICE "disabling subdriver %s\n",
5737 ibm->name);
5738 ret = 0;
5739 goto err_out;
5740 }
5741 if (ret < 0)
5742 goto err_out;
5743 }
5744 }
5745
5746 dbg_printk(TPACPI_DBG_INIT,
5747 "%s installed\n", ibm->name);
5748
5749 if (ibm->read) {
5750 entry = create_proc_entry(ibm->name,
5751 S_IFREG | S_IRUGO | S_IWUSR,
5752 proc_dir);
5753 if (!entry) {
5754 printk(TPACPI_ERR "unable to create proc entry %s\n",
5755 ibm->name);
5756 ret = -ENODEV;
5757 goto err_out;
5758 }
5759 entry->owner = THIS_MODULE;
5760 entry->data = ibm;
5761 entry->read_proc = &dispatch_procfs_read;
5762 if (ibm->write)
5763 entry->write_proc = &dispatch_procfs_write;
5764 ibm->flags.proc_created = 1;
5765 }
5766
5767 list_add_tail(&ibm->all_drivers, &tpacpi_all_drivers);
5768
5769 return 0;
5770
5771 err_out:
5772 dbg_printk(TPACPI_DBG_INIT,
5773 "%s: at error exit path with result %d\n",
5774 ibm->name, ret);
5775
5776 ibm_exit(ibm);
5777 return (ret < 0)? ret : 0;
5778 }
5779
5780 /* Probing */
5781
5782 static void __init get_thinkpad_model_data(struct thinkpad_id_data *tp)
5783 {
5784 const struct dmi_device *dev = NULL;
5785 char ec_fw_string[18];
5786
5787 if (!tp)
5788 return;
5789
5790 memset(tp, 0, sizeof(*tp));
5791
5792 if (dmi_name_in_vendors("IBM"))
5793 tp->vendor = PCI_VENDOR_ID_IBM;
5794 else if (dmi_name_in_vendors("LENOVO"))
5795 tp->vendor = PCI_VENDOR_ID_LENOVO;
5796 else
5797 return;
5798
5799 tp->bios_version_str = kstrdup(dmi_get_system_info(DMI_BIOS_VERSION),
5800 GFP_KERNEL);
5801 if (!tp->bios_version_str)
5802 return;
5803 tp->bios_model = tp->bios_version_str[0]
5804 | (tp->bios_version_str[1] << 8);
5805
5806 /*
5807 * ThinkPad T23 or newer, A31 or newer, R50e or newer,
5808 * X32 or newer, all Z series; Some models must have an
5809 * up-to-date BIOS or they will not be detected.
5810 *
5811 * See http://thinkwiki.org/wiki/List_of_DMI_IDs
5812 */
5813 while ((dev = dmi_find_device(DMI_DEV_TYPE_OEM_STRING, NULL, dev))) {
5814 if (sscanf(dev->name,
5815 "IBM ThinkPad Embedded Controller -[%17c",
5816 ec_fw_string) == 1) {
5817 ec_fw_string[sizeof(ec_fw_string) - 1] = 0;
5818 ec_fw_string[strcspn(ec_fw_string, " ]")] = 0;
5819
5820 tp->ec_version_str = kstrdup(ec_fw_string, GFP_KERNEL);
5821 tp->ec_model = ec_fw_string[0]
5822 | (ec_fw_string[1] << 8);
5823 break;
5824 }
5825 }
5826
5827 tp->model_str = kstrdup(dmi_get_system_info(DMI_PRODUCT_VERSION),
5828 GFP_KERNEL);
5829 if (strnicmp(tp->model_str, "ThinkPad", 8) != 0) {
5830 kfree(tp->model_str);
5831 tp->model_str = NULL;
5832 }
5833 }
5834
5835 static int __init probe_for_thinkpad(void)
5836 {
5837 int is_thinkpad;
5838
5839 if (acpi_disabled)
5840 return -ENODEV;
5841
5842 /*
5843 * Non-ancient models have better DMI tagging, but very old models
5844 * don't.
5845 */
5846 is_thinkpad = (thinkpad_id.model_str != NULL);
5847
5848 /* ec is required because many other handles are relative to it */
5849 TPACPI_ACPIHANDLE_INIT(ec);
5850 if (!ec_handle) {
5851 if (is_thinkpad)
5852 printk(TPACPI_ERR
5853 "Not yet supported ThinkPad detected!\n");
5854 return -ENODEV;
5855 }
5856
5857 /*
5858 * Risks a regression on very old machines, but reduces potential
5859 * false positives a damn great deal
5860 */
5861 if (!is_thinkpad)
5862 is_thinkpad = (thinkpad_id.vendor == PCI_VENDOR_ID_IBM);
5863
5864 if (!is_thinkpad && !force_load)
5865 return -ENODEV;
5866
5867 return 0;
5868 }
5869
5870
5871 /* Module init, exit, parameters */
5872
5873 static struct ibm_init_struct ibms_init[] __initdata = {
5874 {
5875 .init = thinkpad_acpi_driver_init,
5876 .data = &thinkpad_acpi_driver_data,
5877 },
5878 {
5879 .init = hotkey_init,
5880 .data = &hotkey_driver_data,
5881 },
5882 {
5883 .init = bluetooth_init,
5884 .data = &bluetooth_driver_data,
5885 },
5886 {
5887 .init = wan_init,
5888 .data = &wan_driver_data,
5889 },
5890 #ifdef CONFIG_THINKPAD_ACPI_VIDEO
5891 {
5892 .init = video_init,
5893 .data = &video_driver_data,
5894 },
5895 #endif
5896 {
5897 .init = light_init,
5898 .data = &light_driver_data,
5899 },
5900 #ifdef CONFIG_THINKPAD_ACPI_DOCK
5901 {
5902 .init = dock_init,
5903 .data = &dock_driver_data[0],
5904 },
5905 {
5906 .init = dock_init2,
5907 .data = &dock_driver_data[1],
5908 },
5909 #endif
5910 #ifdef CONFIG_THINKPAD_ACPI_BAY
5911 {
5912 .init = bay_init,
5913 .data = &bay_driver_data,
5914 },
5915 #endif
5916 {
5917 .init = cmos_init,
5918 .data = &cmos_driver_data,
5919 },
5920 {
5921 .init = led_init,
5922 .data = &led_driver_data,
5923 },
5924 {
5925 .init = beep_init,
5926 .data = &beep_driver_data,
5927 },
5928 {
5929 .init = thermal_init,
5930 .data = &thermal_driver_data,
5931 },
5932 {
5933 .data = &ecdump_driver_data,
5934 },
5935 {
5936 .init = brightness_init,
5937 .data = &brightness_driver_data,
5938 },
5939 {
5940 .data = &volume_driver_data,
5941 },
5942 {
5943 .init = fan_init,
5944 .data = &fan_driver_data,
5945 },
5946 };
5947
5948 static int __init set_ibm_param(const char *val, struct kernel_param *kp)
5949 {
5950 unsigned int i;
5951 struct ibm_struct *ibm;
5952
5953 if (!kp || !kp->name || !val)
5954 return -EINVAL;
5955
5956 for (i = 0; i < ARRAY_SIZE(ibms_init); i++) {
5957 ibm = ibms_init[i].data;
5958 WARN_ON(ibm == NULL);
5959
5960 if (!ibm || !ibm->name)
5961 continue;
5962
5963 if (strcmp(ibm->name, kp->name) == 0 && ibm->write) {
5964 if (strlen(val) > sizeof(ibms_init[i].param) - 2)
5965 return -ENOSPC;
5966 strcpy(ibms_init[i].param, val);
5967 strcat(ibms_init[i].param, ",");
5968 return 0;
5969 }
5970 }
5971
5972 return -EINVAL;
5973 }
5974
5975 module_param(experimental, int, 0);
5976 MODULE_PARM_DESC(experimental,
5977 "Enables experimental features when non-zero");
5978
5979 module_param_named(debug, dbg_level, uint, 0);
5980 MODULE_PARM_DESC(debug, "Sets debug level bit-mask");
5981
5982 module_param(force_load, bool, 0);
5983 MODULE_PARM_DESC(force_load,
5984 "Attempts to load the driver even on a "
5985 "mis-identified ThinkPad when true");
5986
5987 module_param_named(fan_control, fan_control_allowed, bool, 0);
5988 MODULE_PARM_DESC(fan_control,
5989 "Enables setting fan parameters features when true");
5990
5991 module_param_named(brightness_mode, brightness_mode, int, 0);
5992 MODULE_PARM_DESC(brightness_mode,
5993 "Selects brightness control strategy: "
5994 "0=auto, 1=EC, 2=CMOS, 3=both");
5995
5996 module_param(brightness_enable, uint, 0);
5997 MODULE_PARM_DESC(brightness_enable,
5998 "Enables backlight control when 1, disables when 0");
5999
6000 module_param(hotkey_report_mode, uint, 0);
6001 MODULE_PARM_DESC(hotkey_report_mode,
6002 "used for backwards compatibility with userspace, "
6003 "see documentation");
6004
6005 #define TPACPI_PARAM(feature) \
6006 module_param_call(feature, set_ibm_param, NULL, NULL, 0); \
6007 MODULE_PARM_DESC(feature, "Simulates thinkpad-acpi procfs command " \
6008 "at module load, see documentation")
6009
6010 TPACPI_PARAM(hotkey);
6011 TPACPI_PARAM(bluetooth);
6012 TPACPI_PARAM(video);
6013 TPACPI_PARAM(light);
6014 #ifdef CONFIG_THINKPAD_ACPI_DOCK
6015 TPACPI_PARAM(dock);
6016 #endif
6017 #ifdef CONFIG_THINKPAD_ACPI_BAY
6018 TPACPI_PARAM(bay);
6019 #endif /* CONFIG_THINKPAD_ACPI_BAY */
6020 TPACPI_PARAM(cmos);
6021 TPACPI_PARAM(led);
6022 TPACPI_PARAM(beep);
6023 TPACPI_PARAM(ecdump);
6024 TPACPI_PARAM(brightness);
6025 TPACPI_PARAM(volume);
6026 TPACPI_PARAM(fan);
6027
6028 static void thinkpad_acpi_module_exit(void)
6029 {
6030 struct ibm_struct *ibm, *itmp;
6031
6032 tpacpi_lifecycle = TPACPI_LIFE_EXITING;
6033
6034 list_for_each_entry_safe_reverse(ibm, itmp,
6035 &tpacpi_all_drivers,
6036 all_drivers) {
6037 ibm_exit(ibm);
6038 }
6039
6040 dbg_printk(TPACPI_DBG_INIT, "finished subdriver exit path...\n");
6041
6042 if (tpacpi_inputdev) {
6043 if (tp_features.input_device_registered)
6044 input_unregister_device(tpacpi_inputdev);
6045 else
6046 input_free_device(tpacpi_inputdev);
6047 }
6048
6049 if (tpacpi_hwmon)
6050 hwmon_device_unregister(tpacpi_hwmon);
6051
6052 if (tp_features.sensors_pdev_attrs_registered)
6053 device_remove_file(&tpacpi_sensors_pdev->dev,
6054 &dev_attr_thinkpad_acpi_pdev_name);
6055 if (tpacpi_sensors_pdev)
6056 platform_device_unregister(tpacpi_sensors_pdev);
6057 if (tpacpi_pdev)
6058 platform_device_unregister(tpacpi_pdev);
6059
6060 if (tp_features.sensors_pdrv_attrs_registered)
6061 tpacpi_remove_driver_attributes(&tpacpi_hwmon_pdriver.driver);
6062 if (tp_features.platform_drv_attrs_registered)
6063 tpacpi_remove_driver_attributes(&tpacpi_pdriver.driver);
6064
6065 if (tp_features.sensors_pdrv_registered)
6066 platform_driver_unregister(&tpacpi_hwmon_pdriver);
6067
6068 if (tp_features.platform_drv_registered)
6069 platform_driver_unregister(&tpacpi_pdriver);
6070
6071 if (proc_dir)
6072 remove_proc_entry(TPACPI_PROC_DIR, acpi_root_dir);
6073
6074 kfree(thinkpad_id.bios_version_str);
6075 kfree(thinkpad_id.ec_version_str);
6076 kfree(thinkpad_id.model_str);
6077 }
6078
6079
6080 static int __init thinkpad_acpi_module_init(void)
6081 {
6082 int ret, i;
6083
6084 tpacpi_lifecycle = TPACPI_LIFE_INIT;
6085
6086 /* Parameter checking */
6087 if (hotkey_report_mode > 2)
6088 return -EINVAL;
6089
6090 /* Driver-level probe */
6091
6092 get_thinkpad_model_data(&thinkpad_id);
6093 ret = probe_for_thinkpad();
6094 if (ret) {
6095 thinkpad_acpi_module_exit();
6096 return ret;
6097 }
6098
6099 /* Driver initialization */
6100
6101 TPACPI_ACPIHANDLE_INIT(ecrd);
6102 TPACPI_ACPIHANDLE_INIT(ecwr);
6103
6104 proc_dir = proc_mkdir(TPACPI_PROC_DIR, acpi_root_dir);
6105 if (!proc_dir) {
6106 printk(TPACPI_ERR
6107 "unable to create proc dir " TPACPI_PROC_DIR);
6108 thinkpad_acpi_module_exit();
6109 return -ENODEV;
6110 }
6111 proc_dir->owner = THIS_MODULE;
6112
6113 ret = platform_driver_register(&tpacpi_pdriver);
6114 if (ret) {
6115 printk(TPACPI_ERR
6116 "unable to register main platform driver\n");
6117 thinkpad_acpi_module_exit();
6118 return ret;
6119 }
6120 tp_features.platform_drv_registered = 1;
6121
6122 ret = platform_driver_register(&tpacpi_hwmon_pdriver);
6123 if (ret) {
6124 printk(TPACPI_ERR
6125 "unable to register hwmon platform driver\n");
6126 thinkpad_acpi_module_exit();
6127 return ret;
6128 }
6129 tp_features.sensors_pdrv_registered = 1;
6130
6131 ret = tpacpi_create_driver_attributes(&tpacpi_pdriver.driver);
6132 if (!ret) {
6133 tp_features.platform_drv_attrs_registered = 1;
6134 ret = tpacpi_create_driver_attributes(
6135 &tpacpi_hwmon_pdriver.driver);
6136 }
6137 if (ret) {
6138 printk(TPACPI_ERR
6139 "unable to create sysfs driver attributes\n");
6140 thinkpad_acpi_module_exit();
6141 return ret;
6142 }
6143 tp_features.sensors_pdrv_attrs_registered = 1;
6144
6145
6146 /* Device initialization */
6147 tpacpi_pdev = platform_device_register_simple(TPACPI_DRVR_NAME, -1,
6148 NULL, 0);
6149 if (IS_ERR(tpacpi_pdev)) {
6150 ret = PTR_ERR(tpacpi_pdev);
6151 tpacpi_pdev = NULL;
6152 printk(TPACPI_ERR "unable to register platform device\n");
6153 thinkpad_acpi_module_exit();
6154 return ret;
6155 }
6156 tpacpi_sensors_pdev = platform_device_register_simple(
6157 TPACPI_HWMON_DRVR_NAME,
6158 -1, NULL, 0);
6159 if (IS_ERR(tpacpi_sensors_pdev)) {
6160 ret = PTR_ERR(tpacpi_sensors_pdev);
6161 tpacpi_sensors_pdev = NULL;
6162 printk(TPACPI_ERR
6163 "unable to register hwmon platform device\n");
6164 thinkpad_acpi_module_exit();
6165 return ret;
6166 }
6167 ret = device_create_file(&tpacpi_sensors_pdev->dev,
6168 &dev_attr_thinkpad_acpi_pdev_name);
6169 if (ret) {
6170 printk(TPACPI_ERR
6171 "unable to create sysfs hwmon device attributes\n");
6172 thinkpad_acpi_module_exit();
6173 return ret;
6174 }
6175 tp_features.sensors_pdev_attrs_registered = 1;
6176 tpacpi_hwmon = hwmon_device_register(&tpacpi_sensors_pdev->dev);
6177 if (IS_ERR(tpacpi_hwmon)) {
6178 ret = PTR_ERR(tpacpi_hwmon);
6179 tpacpi_hwmon = NULL;
6180 printk(TPACPI_ERR "unable to register hwmon device\n");
6181 thinkpad_acpi_module_exit();
6182 return ret;
6183 }
6184 mutex_init(&tpacpi_inputdev_send_mutex);
6185 tpacpi_inputdev = input_allocate_device();
6186 if (!tpacpi_inputdev) {
6187 printk(TPACPI_ERR "unable to allocate input device\n");
6188 thinkpad_acpi_module_exit();
6189 return -ENOMEM;
6190 } else {
6191 /* Prepare input device, but don't register */
6192 tpacpi_inputdev->name = "ThinkPad Extra Buttons";
6193 tpacpi_inputdev->phys = TPACPI_DRVR_NAME "/input0";
6194 tpacpi_inputdev->id.bustype = BUS_HOST;
6195 tpacpi_inputdev->id.vendor = (thinkpad_id.vendor) ?
6196 thinkpad_id.vendor :
6197 PCI_VENDOR_ID_IBM;
6198 tpacpi_inputdev->id.product = TPACPI_HKEY_INPUT_PRODUCT;
6199 tpacpi_inputdev->id.version = TPACPI_HKEY_INPUT_VERSION;
6200 }
6201 for (i = 0; i < ARRAY_SIZE(ibms_init); i++) {
6202 ret = ibm_init(&ibms_init[i]);
6203 if (ret >= 0 && *ibms_init[i].param)
6204 ret = ibms_init[i].data->write(ibms_init[i].param);
6205 if (ret < 0) {
6206 thinkpad_acpi_module_exit();
6207 return ret;
6208 }
6209 }
6210 ret = input_register_device(tpacpi_inputdev);
6211 if (ret < 0) {
6212 printk(TPACPI_ERR "unable to register input device\n");
6213 thinkpad_acpi_module_exit();
6214 return ret;
6215 } else {
6216 tp_features.input_device_registered = 1;
6217 }
6218
6219 tpacpi_lifecycle = TPACPI_LIFE_RUNNING;
6220 return 0;
6221 }
6222
6223 /* Please remove this in year 2009 */
6224 MODULE_ALIAS("ibm_acpi");
6225
6226 /*
6227 * DMI matching for module autoloading
6228 *
6229 * See http://thinkwiki.org/wiki/List_of_DMI_IDs
6230 * See http://thinkwiki.org/wiki/BIOS_Upgrade_Downloads
6231 *
6232 * Only models listed in thinkwiki will be supported, so add yours
6233 * if it is not there yet.
6234 */
6235 #define IBM_BIOS_MODULE_ALIAS(__type) \
6236 MODULE_ALIAS("dmi:bvnIBM:bvr" __type "ET??WW")
6237
6238 /* Non-ancient thinkpads */
6239 MODULE_ALIAS("dmi:bvnIBM:*:svnIBM:*:pvrThinkPad*:rvnIBM:*");
6240 MODULE_ALIAS("dmi:bvnLENOVO:*:svnLENOVO:*:pvrThinkPad*:rvnLENOVO:*");
6241
6242 /* Ancient thinkpad BIOSes have to be identified by
6243 * BIOS type or model number, and there are far less
6244 * BIOS types than model numbers... */
6245 IBM_BIOS_MODULE_ALIAS("I[B,D,H,I,M,N,O,T,W,V,Y,Z]");
6246 IBM_BIOS_MODULE_ALIAS("1[0,3,6,8,A-G,I,K,M-P,S,T]");
6247 IBM_BIOS_MODULE_ALIAS("K[U,X-Z]");
6248
6249 MODULE_AUTHOR("Borislav Deianov, Henrique de Moraes Holschuh");
6250 MODULE_DESCRIPTION(TPACPI_DESC);
6251 MODULE_VERSION(TPACPI_VERSION);
6252 MODULE_LICENSE("GPL");
6253
6254 module_init(thinkpad_acpi_module_init);
6255 module_exit(thinkpad_acpi_module_exit);
kernel-based virtual machine