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ACPI: thinkpad-acpi: BIOS backlight mode helper (v2)
[linux-2.6/linux-acpi-2.6/ibm-acpi-2.6.git] / drivers / misc / thinkpad_acpi.c
blob2c85a2e10a2513e36453fefb6372d6889f9de65b
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 bright_acpimode:1;
229 u32 wan:1;
230 u32 fan_ctrl_status_undef:1;
231 u32 input_device_registered:1;
232 u32 platform_drv_registered:1;
233 u32 platform_drv_attrs_registered:1;
234 u32 sensors_pdrv_registered:1;
235 u32 sensors_pdrv_attrs_registered:1;
236 u32 sensors_pdev_attrs_registered:1;
237 u32 hotkey_poll_active:1;
238 } tp_features;
239
240 struct thinkpad_id_data {
241 unsigned int vendor; /* ThinkPad vendor:
242 * PCI_VENDOR_ID_IBM/PCI_VENDOR_ID_LENOVO */
243
244 char *bios_version_str; /* Something like 1ZET51WW (1.03z) */
245 char *ec_version_str; /* Something like 1ZHT51WW-1.04a */
246
247 u16 bios_model; /* Big Endian, TP-1Y = 0x5931, 0 = unknown */
248 u16 ec_model;
249
250 char *model_str;
251 };
252 static struct thinkpad_id_data thinkpad_id;
253
254 static enum {
255 TPACPI_LIFE_INIT = 0,
256 TPACPI_LIFE_RUNNING,
257 TPACPI_LIFE_EXITING,
258 } tpacpi_lifecycle;
259
260 static int experimental;
261 static u32 dbg_level;
262
263 /****************************************************************************
264 ****************************************************************************
265 *
266 * ACPI Helpers and device model
267 *
268 ****************************************************************************
269 ****************************************************************************/
270
271 /*************************************************************************
272 * ACPI basic handles
273 */
274
275 static acpi_handle root_handle;
276
277 #define TPACPI_HANDLE(object, parent, paths...) \
278 static acpi_handle object##_handle; \
279 static acpi_handle *object##_parent = &parent##_handle; \
280 static char *object##_path; \
281 static char *object##_paths[] = { paths }
282
283 TPACPI_HANDLE(ec, root, "\\_SB.PCI0.ISA.EC0", /* 240, 240x */
284 "\\_SB.PCI.ISA.EC", /* 570 */
285 "\\_SB.PCI0.ISA0.EC0", /* 600e/x, 770e, 770x */
286 "\\_SB.PCI0.ISA.EC", /* A21e, A2xm/p, T20-22, X20-21 */
287 "\\_SB.PCI0.AD4S.EC0", /* i1400, R30 */
288 "\\_SB.PCI0.ICH3.EC0", /* R31 */
289 "\\_SB.PCI0.LPC.EC", /* all others */
290 );
291
292 TPACPI_HANDLE(ecrd, ec, "ECRD"); /* 570 */
293 TPACPI_HANDLE(ecwr, ec, "ECWR"); /* 570 */
294
295 TPACPI_HANDLE(cmos, root, "\\UCMS", /* R50, R50e, R50p, R51, */
296 /* T4x, X31, X40 */
297 "\\CMOS", /* A3x, G4x, R32, T23, T30, X22-24, X30 */
298 "\\CMS", /* R40, R40e */
299 ); /* all others */
300
301 TPACPI_HANDLE(hkey, ec, "\\_SB.HKEY", /* 600e/x, 770e, 770x */
302 "^HKEY", /* R30, R31 */
303 "HKEY", /* all others */
304 ); /* 570 */
305
306 TPACPI_HANDLE(vid, root, "\\_SB.PCI.AGP.VGA", /* 570 */
307 "\\_SB.PCI0.AGP0.VID0", /* 600e/x, 770x */
308 "\\_SB.PCI0.VID0", /* 770e */
309 "\\_SB.PCI0.VID", /* A21e, G4x, R50e, X30, X40 */
310 "\\_SB.PCI0.AGP.VID", /* all others */
311 ); /* R30, R31 */
312
313
314 /*************************************************************************
315 * ACPI helpers
316 */
317
318 static int acpi_evalf(acpi_handle handle,
319 void *res, char *method, char *fmt, ...)
320 {
321 char *fmt0 = fmt;
322 struct acpi_object_list params;
323 union acpi_object in_objs[TPACPI_MAX_ACPI_ARGS];
324 struct acpi_buffer result, *resultp;
325 union acpi_object out_obj;
326 acpi_status status;
327 va_list ap;
328 char res_type;
329 int success;
330 int quiet;
331
332 if (!*fmt) {
333 printk(TPACPI_ERR "acpi_evalf() called with empty format\n");
334 return 0;
335 }
336
337 if (*fmt == 'q') {
338 quiet = 1;
339 fmt++;
340 } else
341 quiet = 0;
342
343 res_type = *(fmt++);
344
345 params.count = 0;
346 params.pointer = &in_objs[0];
347
348 va_start(ap, fmt);
349 while (*fmt) {
350 char c = *(fmt++);
351 switch (c) {
352 case 'd': /* int */
353 in_objs[params.count].integer.value = va_arg(ap, int);
354 in_objs[params.count++].type = ACPI_TYPE_INTEGER;
355 break;
356 /* add more types as needed */
357 default:
358 printk(TPACPI_ERR "acpi_evalf() called "
359 "with invalid format character '%c'\n", c);
360 return 0;
361 }
362 }
363 va_end(ap);
364
365 if (res_type != 'v') {
366 result.length = sizeof(out_obj);
367 result.pointer = &out_obj;
368 resultp = &result;
369 } else
370 resultp = NULL;
371
372 status = acpi_evaluate_object(handle, method, &params, resultp);
373
374 switch (res_type) {
375 case 'd': /* int */
376 if (res)
377 *(int *)res = out_obj.integer.value;
378 success = status == AE_OK && out_obj.type == ACPI_TYPE_INTEGER;
379 break;
380 case 'v': /* void */
381 success = status == AE_OK;
382 break;
383 /* add more types as needed */
384 default:
385 printk(TPACPI_ERR "acpi_evalf() called "
386 "with invalid format character '%c'\n", res_type);
387 return 0;
388 }
389
390 if (!success && !quiet)
391 printk(TPACPI_ERR "acpi_evalf(%s, %s, ...) failed: %d\n",
392 method, fmt0, status);
393
394 return success;
395 }
396
397 static int acpi_ec_read(int i, u8 *p)
398 {
399 int v;
400
401 if (ecrd_handle) {
402 if (!acpi_evalf(ecrd_handle, &v, NULL, "dd", i))
403 return 0;
404 *p = v;
405 } else {
406 if (ec_read(i, p) < 0)
407 return 0;
408 }
409
410 return 1;
411 }
412
413 static int acpi_ec_write(int i, u8 v)
414 {
415 if (ecwr_handle) {
416 if (!acpi_evalf(ecwr_handle, NULL, NULL, "vdd", i, v))
417 return 0;
418 } else {
419 if (ec_write(i, v) < 0)
420 return 0;
421 }
422
423 return 1;
424 }
425
426 #if defined(CONFIG_THINKPAD_ACPI_DOCK) || defined(CONFIG_THINKPAD_ACPI_BAY)
427 static int _sta(acpi_handle handle)
428 {
429 int status;
430
431 if (!handle || !acpi_evalf(handle, &status, "_STA", "d"))
432 status = 0;
433
434 return status;
435 }
436 #endif
437
438 static int issue_thinkpad_cmos_command(int cmos_cmd)
439 {
440 if (!cmos_handle)
441 return -ENXIO;
442
443 if (!acpi_evalf(cmos_handle, NULL, NULL, "vd", cmos_cmd))
444 return -EIO;
445
446 return 0;
447 }
448
449 /*************************************************************************
450 * ACPI device model
451 */
452
453 #define TPACPI_ACPIHANDLE_INIT(object) \
454 drv_acpi_handle_init(#object, &object##_handle, *object##_parent, \
455 object##_paths, ARRAY_SIZE(object##_paths), &object##_path)
456
457 static void drv_acpi_handle_init(char *name,
458 acpi_handle *handle, acpi_handle parent,
459 char **paths, int num_paths, char **path)
460 {
461 int i;
462 acpi_status status;
463
464 vdbg_printk(TPACPI_DBG_INIT, "trying to locate ACPI handle for %s\n",
465 name);
466
467 for (i = 0; i < num_paths; i++) {
468 status = acpi_get_handle(parent, paths[i], handle);
469 if (ACPI_SUCCESS(status)) {
470 *path = paths[i];
471 dbg_printk(TPACPI_DBG_INIT,
472 "Found ACPI handle %s for %s\n",
473 *path, name);
474 return;
475 }
476 }
477
478 vdbg_printk(TPACPI_DBG_INIT, "ACPI handle for %s not found\n",
479 name);
480 *handle = NULL;
481 }
482
483 static void dispatch_acpi_notify(acpi_handle handle, u32 event, void *data)
484 {
485 struct ibm_struct *ibm = data;
486
487 if (tpacpi_lifecycle != TPACPI_LIFE_RUNNING)
488 return;
489
490 if (!ibm || !ibm->acpi || !ibm->acpi->notify)
491 return;
492
493 ibm->acpi->notify(ibm, event);
494 }
495
496 static int __init setup_acpi_notify(struct ibm_struct *ibm)
497 {
498 acpi_status status;
499 int rc;
500
501 BUG_ON(!ibm->acpi);
502
503 if (!*ibm->acpi->handle)
504 return 0;
505
506 vdbg_printk(TPACPI_DBG_INIT,
507 "setting up ACPI notify for %s\n", ibm->name);
508
509 rc = acpi_bus_get_device(*ibm->acpi->handle, &ibm->acpi->device);
510 if (rc < 0) {
511 printk(TPACPI_ERR "acpi_bus_get_device(%s) failed: %d\n",
512 ibm->name, rc);
513 return -ENODEV;
514 }
515
516 acpi_driver_data(ibm->acpi->device) = ibm;
517 sprintf(acpi_device_class(ibm->acpi->device), "%s/%s",
518 TPACPI_ACPI_EVENT_PREFIX,
519 ibm->name);
520
521 status = acpi_install_notify_handler(*ibm->acpi->handle,
522 ibm->acpi->type, dispatch_acpi_notify, ibm);
523 if (ACPI_FAILURE(status)) {
524 if (status == AE_ALREADY_EXISTS) {
525 printk(TPACPI_NOTICE
526 "another device driver is already "
527 "handling %s events\n", ibm->name);
528 } else {
529 printk(TPACPI_ERR
530 "acpi_install_notify_handler(%s) failed: %d\n",
531 ibm->name, status);
532 }
533 return -ENODEV;
534 }
535 ibm->flags.acpi_notify_installed = 1;
536 return 0;
537 }
538
539 static int __init tpacpi_device_add(struct acpi_device *device)
540 {
541 return 0;
542 }
543
544 static int __init register_tpacpi_subdriver(struct ibm_struct *ibm)
545 {
546 int rc;
547
548 dbg_printk(TPACPI_DBG_INIT,
549 "registering %s as an ACPI driver\n", ibm->name);
550
551 BUG_ON(!ibm->acpi);
552
553 ibm->acpi->driver = kzalloc(sizeof(struct acpi_driver), GFP_KERNEL);
554 if (!ibm->acpi->driver) {
555 printk(TPACPI_ERR "kzalloc(ibm->driver) failed\n");
556 return -ENOMEM;
557 }
558
559 sprintf(ibm->acpi->driver->name, "%s_%s", TPACPI_NAME, ibm->name);
560 ibm->acpi->driver->ids = ibm->acpi->hid;
561
562 ibm->acpi->driver->ops.add = &tpacpi_device_add;
563
564 rc = acpi_bus_register_driver(ibm->acpi->driver);
565 if (rc < 0) {
566 printk(TPACPI_ERR "acpi_bus_register_driver(%s) failed: %d\n",
567 ibm->name, rc);
568 kfree(ibm->acpi->driver);
569 ibm->acpi->driver = NULL;
570 } else if (!rc)
571 ibm->flags.acpi_driver_registered = 1;
572
573 return rc;
574 }
575
576
577 /****************************************************************************
578 ****************************************************************************
579 *
580 * Procfs Helpers
581 *
582 ****************************************************************************
583 ****************************************************************************/
584
585 static int dispatch_procfs_read(char *page, char **start, off_t off,
586 int count, int *eof, void *data)
587 {
588 struct ibm_struct *ibm = data;
589 int len;
590
591 if (!ibm || !ibm->read)
592 return -EINVAL;
593
594 len = ibm->read(page);
595 if (len < 0)
596 return len;
597
598 if (len <= off + count)
599 *eof = 1;
600 *start = page + off;
601 len -= off;
602 if (len > count)
603 len = count;
604 if (len < 0)
605 len = 0;
606
607 return len;
608 }
609
610 static int dispatch_procfs_write(struct file *file,
611 const char __user *userbuf,
612 unsigned long count, void *data)
613 {
614 struct ibm_struct *ibm = data;
615 char *kernbuf;
616 int ret;
617
618 if (!ibm || !ibm->write)
619 return -EINVAL;
620
621 kernbuf = kmalloc(count + 2, GFP_KERNEL);
622 if (!kernbuf)
623 return -ENOMEM;
624
625 if (copy_from_user(kernbuf, userbuf, count)) {
626 kfree(kernbuf);
627 return -EFAULT;
628 }
629
630 kernbuf[count] = 0;
631 strcat(kernbuf, ",");
632 ret = ibm->write(kernbuf);
633 if (ret == 0)
634 ret = count;
635
636 kfree(kernbuf);
637
638 return ret;
639 }
640
641 static char *next_cmd(char **cmds)
642 {
643 char *start = *cmds;
644 char *end;
645
646 while ((end = strchr(start, ',')) && end == start)
647 start = end + 1;
648
649 if (!end)
650 return NULL;
651
652 *end = 0;
653 *cmds = end + 1;
654 return start;
655 }
656
657
658 /****************************************************************************
659 ****************************************************************************
660 *
661 * Device model: input, hwmon and platform
662 *
663 ****************************************************************************
664 ****************************************************************************/
665
666 static struct platform_device *tpacpi_pdev;
667 static struct platform_device *tpacpi_sensors_pdev;
668 static struct device *tpacpi_hwmon;
669 static struct input_dev *tpacpi_inputdev;
670 static struct mutex tpacpi_inputdev_send_mutex;
671 static LIST_HEAD(tpacpi_all_drivers);
672
673 static int tpacpi_suspend_handler(struct platform_device *pdev,
674 pm_message_t state)
675 {
676 struct ibm_struct *ibm, *itmp;
677
678 list_for_each_entry_safe(ibm, itmp,
679 &tpacpi_all_drivers,
680 all_drivers) {
681 if (ibm->suspend)
682 (ibm->suspend)(state);
683 }
684
685 return 0;
686 }
687
688 static int tpacpi_resume_handler(struct platform_device *pdev)
689 {
690 struct ibm_struct *ibm, *itmp;
691
692 list_for_each_entry_safe(ibm, itmp,
693 &tpacpi_all_drivers,
694 all_drivers) {
695 if (ibm->resume)
696 (ibm->resume)();
697 }
698
699 return 0;
700 }
701
702 static struct platform_driver tpacpi_pdriver = {
703 .driver = {
704 .name = TPACPI_DRVR_NAME,
705 .owner = THIS_MODULE,
706 },
707 .suspend = tpacpi_suspend_handler,
708 .resume = tpacpi_resume_handler,
709 };
710
711 static struct platform_driver tpacpi_hwmon_pdriver = {
712 .driver = {
713 .name = TPACPI_HWMON_DRVR_NAME,
714 .owner = THIS_MODULE,
715 },
716 };
717
718 /*************************************************************************
719 * sysfs support helpers
720 */
721
722 struct attribute_set {
723 unsigned int members, max_members;
724 struct attribute_group group;
725 };
726
727 struct attribute_set_obj {
728 struct attribute_set s;
729 struct attribute *a;
730 } __attribute__((packed));
731
732 static struct attribute_set *create_attr_set(unsigned int max_members,
733 const char *name)
734 {
735 struct attribute_set_obj *sobj;
736
737 if (max_members == 0)
738 return NULL;
739
740 /* Allocates space for implicit NULL at the end too */
741 sobj = kzalloc(sizeof(struct attribute_set_obj) +
742 max_members * sizeof(struct attribute *),
743 GFP_KERNEL);
744 if (!sobj)
745 return NULL;
746 sobj->s.max_members = max_members;
747 sobj->s.group.attrs = &sobj->a;
748 sobj->s.group.name = name;
749
750 return &sobj->s;
751 }
752
753 #define destroy_attr_set(_set) \
754 kfree(_set);
755
756 /* not multi-threaded safe, use it in a single thread per set */
757 static int add_to_attr_set(struct attribute_set *s, struct attribute *attr)
758 {
759 if (!s || !attr)
760 return -EINVAL;
761
762 if (s->members >= s->max_members)
763 return -ENOMEM;
764
765 s->group.attrs[s->members] = attr;
766 s->members++;
767
768 return 0;
769 }
770
771 static int add_many_to_attr_set(struct attribute_set *s,
772 struct attribute **attr,
773 unsigned int count)
774 {
775 int i, res;
776
777 for (i = 0; i < count; i++) {
778 res = add_to_attr_set(s, attr[i]);
779 if (res)
780 return res;
781 }
782
783 return 0;
784 }
785
786 static void delete_attr_set(struct attribute_set *s, struct kobject *kobj)
787 {
788 sysfs_remove_group(kobj, &s->group);
789 destroy_attr_set(s);
790 }
791
792 #define register_attr_set_with_sysfs(_attr_set, _kobj) \
793 sysfs_create_group(_kobj, &_attr_set->group)
794
795 static int parse_strtoul(const char *buf,
796 unsigned long max, unsigned long *value)
797 {
798 char *endp;
799
800 while (*buf && isspace(*buf))
801 buf++;
802 *value = simple_strtoul(buf, &endp, 0);
803 while (*endp && isspace(*endp))
804 endp++;
805 if (*endp || *value > max)
806 return -EINVAL;
807
808 return 0;
809 }
810
811 static int __init tpacpi_query_bcl_levels(acpi_handle handle)
812 {
813 struct acpi_buffer buffer = { ACPI_ALLOCATE_BUFFER, NULL };
814 union acpi_object *obj;
815 int rc;
816
817 if (ACPI_SUCCESS(acpi_evaluate_object(handle, NULL, NULL, &buffer))) {
818 obj = (union acpi_object *)buffer.pointer;
819 if (!obj || (obj->type != ACPI_TYPE_PACKAGE)) {
820 printk(TPACPI_ERR "Unknown _BCL data, "
821 "please report this to %s\n", TPACPI_MAIL);
822 rc = 0;
823 } else {
824 rc = obj->package.count;
825 }
826 } else {
827 return 0;
828 }
829
830 kfree(buffer.pointer);
831 return rc;
832 }
833
834 static acpi_status __init tpacpi_acpi_walk_find_bcl(acpi_handle handle,
835 u32 lvl, void *context, void **rv)
836 {
837 char name[ACPI_PATH_SEGMENT_LENGTH];
838 struct acpi_buffer buffer = { sizeof(name), &name };
839
840 if (ACPI_SUCCESS(acpi_get_name(handle, ACPI_SINGLE_NAME, &buffer)) &&
841 !strncmp("_BCL", name, sizeof(name) - 1)) {
842 BUG_ON(!rv || !*rv);
843 **(int **)rv = tpacpi_query_bcl_levels(handle);
844 return AE_CTRL_TERMINATE;
845 } else {
846 return AE_OK;
847 }
848 }
849
850 /*
851 * Returns 0 (no ACPI _BCL or _BCL invalid), or size of brightness map
852 */
853 static int __init tpacpi_check_std_acpi_brightness_support(void)
854 {
855 int status;
856 int bcl_levels = 0;
857 void *bcl_ptr = &bcl_levels;
858
859 if (!vid_handle) {
860 TPACPI_ACPIHANDLE_INIT(vid);
861 }
862 if (!vid_handle)
863 return 0;
864
865 /*
866 * Search for a _BCL method, and execute it. This is safe on all
867 * ThinkPads, and as a side-effect, _BCL will place a Lenovo Vista
868 * BIOS in ACPI backlight control mode. We do NOT have to care
869 * about calling the _BCL method in an enabled video device, any
870 * will do for our purposes.
871 */
872
873 status = acpi_walk_namespace(ACPI_TYPE_METHOD, vid_handle, 3,
874 tpacpi_acpi_walk_find_bcl, NULL,
875 &bcl_ptr);
876
877 if (ACPI_SUCCESS(status) && bcl_levels > 2) {
878 tp_features.bright_acpimode = 1;
879 return (bcl_levels - 2);
880 }
881
882 return 0;
883 }
884
885 /*************************************************************************
886 * thinkpad-acpi driver attributes
887 */
888
889 /* interface_version --------------------------------------------------- */
890 static ssize_t tpacpi_driver_interface_version_show(
891 struct device_driver *drv,
892 char *buf)
893 {
894 return snprintf(buf, PAGE_SIZE, "0x%08x\n", TPACPI_SYSFS_VERSION);
895 }
896
897 static DRIVER_ATTR(interface_version, S_IRUGO,
898 tpacpi_driver_interface_version_show, NULL);
899
900 /* debug_level --------------------------------------------------------- */
901 static ssize_t tpacpi_driver_debug_show(struct device_driver *drv,
902 char *buf)
903 {
904 return snprintf(buf, PAGE_SIZE, "0x%04x\n", dbg_level);
905 }
906
907 static ssize_t tpacpi_driver_debug_store(struct device_driver *drv,
908 const char *buf, size_t count)
909 {
910 unsigned long t;
911
912 if (parse_strtoul(buf, 0xffff, &t))
913 return -EINVAL;
914
915 dbg_level = t;
916
917 return count;
918 }
919
920 static DRIVER_ATTR(debug_level, S_IWUSR | S_IRUGO,
921 tpacpi_driver_debug_show, tpacpi_driver_debug_store);
922
923 /* version ------------------------------------------------------------- */
924 static ssize_t tpacpi_driver_version_show(struct device_driver *drv,
925 char *buf)
926 {
927 return snprintf(buf, PAGE_SIZE, "%s v%s\n",
928 TPACPI_DESC, TPACPI_VERSION);
929 }
930
931 static DRIVER_ATTR(version, S_IRUGO,
932 tpacpi_driver_version_show, NULL);
933
934 /* --------------------------------------------------------------------- */
935
936 static struct driver_attribute *tpacpi_driver_attributes[] = {
937 &driver_attr_debug_level, &driver_attr_version,
938 &driver_attr_interface_version,
939 };
940
941 static int __init tpacpi_create_driver_attributes(struct device_driver *drv)
942 {
943 int i, res;
944
945 i = 0;
946 res = 0;
947 while (!res && i < ARRAY_SIZE(tpacpi_driver_attributes)) {
948 res = driver_create_file(drv, tpacpi_driver_attributes[i]);
949 i++;
950 }
951
952 return res;
953 }
954
955 static void tpacpi_remove_driver_attributes(struct device_driver *drv)
956 {
957 int i;
958
959 for (i = 0; i < ARRAY_SIZE(tpacpi_driver_attributes); i++)
960 driver_remove_file(drv, tpacpi_driver_attributes[i]);
961 }
962
963 /****************************************************************************
964 ****************************************************************************
965 *
966 * Subdrivers
967 *
968 ****************************************************************************
969 ****************************************************************************/
970
971 /*************************************************************************
972 * thinkpad-acpi init subdriver
973 */
974
975 static int __init thinkpad_acpi_driver_init(struct ibm_init_struct *iibm)
976 {
977 printk(TPACPI_INFO "%s v%s\n", TPACPI_DESC, TPACPI_VERSION);
978 printk(TPACPI_INFO "%s\n", TPACPI_URL);
979
980 printk(TPACPI_INFO "ThinkPad BIOS %s, EC %s\n",
981 (thinkpad_id.bios_version_str) ?
982 thinkpad_id.bios_version_str : "unknown",
983 (thinkpad_id.ec_version_str) ?
984 thinkpad_id.ec_version_str : "unknown");
985
986 if (thinkpad_id.vendor && thinkpad_id.model_str)
987 printk(TPACPI_INFO "%s %s\n",
988 (thinkpad_id.vendor == PCI_VENDOR_ID_IBM) ?
989 "IBM" : ((thinkpad_id.vendor ==
990 PCI_VENDOR_ID_LENOVO) ?
991 "Lenovo" : "Unknown vendor"),
992 thinkpad_id.model_str);
993
994 return 0;
995 }
996
997 static int thinkpad_acpi_driver_read(char *p)
998 {
999 int len = 0;
1000
1001 len += sprintf(p + len, "driver:\t\t%s\n", TPACPI_DESC);
1002 len += sprintf(p + len, "version:\t%s\n", TPACPI_VERSION);
1003
1004 return len;
1005 }
1006
1007 static struct ibm_struct thinkpad_acpi_driver_data = {
1008 .name = "driver",
1009 .read = thinkpad_acpi_driver_read,
1010 };
1011
1012 /*************************************************************************
1013 * Hotkey subdriver
1014 */
1015
1016 enum { /* hot key scan codes (derived from ACPI DSDT) */
1017 TP_ACPI_HOTKEYSCAN_FNF1 = 0,
1018 TP_ACPI_HOTKEYSCAN_FNF2,
1019 TP_ACPI_HOTKEYSCAN_FNF3,
1020 TP_ACPI_HOTKEYSCAN_FNF4,
1021 TP_ACPI_HOTKEYSCAN_FNF5,
1022 TP_ACPI_HOTKEYSCAN_FNF6,
1023 TP_ACPI_HOTKEYSCAN_FNF7,
1024 TP_ACPI_HOTKEYSCAN_FNF8,
1025 TP_ACPI_HOTKEYSCAN_FNF9,
1026 TP_ACPI_HOTKEYSCAN_FNF10,
1027 TP_ACPI_HOTKEYSCAN_FNF11,
1028 TP_ACPI_HOTKEYSCAN_FNF12,
1029 TP_ACPI_HOTKEYSCAN_FNBACKSPACE,
1030 TP_ACPI_HOTKEYSCAN_FNINSERT,
1031 TP_ACPI_HOTKEYSCAN_FNDELETE,
1032 TP_ACPI_HOTKEYSCAN_FNHOME,
1033 TP_ACPI_HOTKEYSCAN_FNEND,
1034 TP_ACPI_HOTKEYSCAN_FNPAGEUP,
1035 TP_ACPI_HOTKEYSCAN_FNPAGEDOWN,
1036 TP_ACPI_HOTKEYSCAN_FNSPACE,
1037 TP_ACPI_HOTKEYSCAN_VOLUMEUP,
1038 TP_ACPI_HOTKEYSCAN_VOLUMEDOWN,
1039 TP_ACPI_HOTKEYSCAN_MUTE,
1040 TP_ACPI_HOTKEYSCAN_THINKPAD,
1041 };
1042
1043 enum { /* Keys available through NVRAM polling */
1044 TPACPI_HKEY_NVRAM_KNOWN_MASK = 0x00fb88c0U,
1045 TPACPI_HKEY_NVRAM_GOOD_MASK = 0x00fb8000U,
1046 };
1047
1048 enum { /* Positions of some of the keys in hotkey masks */
1049 TP_ACPI_HKEY_DISPSWTCH_MASK = 1 << TP_ACPI_HOTKEYSCAN_FNF7,
1050 TP_ACPI_HKEY_DISPXPAND_MASK = 1 << TP_ACPI_HOTKEYSCAN_FNF8,
1051 TP_ACPI_HKEY_HIBERNATE_MASK = 1 << TP_ACPI_HOTKEYSCAN_FNF12,
1052 TP_ACPI_HKEY_BRGHTUP_MASK = 1 << TP_ACPI_HOTKEYSCAN_FNHOME,
1053 TP_ACPI_HKEY_BRGHTDWN_MASK = 1 << TP_ACPI_HOTKEYSCAN_FNEND,
1054 TP_ACPI_HKEY_THNKLGHT_MASK = 1 << TP_ACPI_HOTKEYSCAN_FNPAGEUP,
1055 TP_ACPI_HKEY_ZOOM_MASK = 1 << TP_ACPI_HOTKEYSCAN_FNSPACE,
1056 TP_ACPI_HKEY_VOLUP_MASK = 1 << TP_ACPI_HOTKEYSCAN_VOLUMEUP,
1057 TP_ACPI_HKEY_VOLDWN_MASK = 1 << TP_ACPI_HOTKEYSCAN_VOLUMEDOWN,
1058 TP_ACPI_HKEY_MUTE_MASK = 1 << TP_ACPI_HOTKEYSCAN_MUTE,
1059 TP_ACPI_HKEY_THINKPAD_MASK = 1 << TP_ACPI_HOTKEYSCAN_THINKPAD,
1060 };
1061
1062 enum { /* NVRAM to ACPI HKEY group map */
1063 TP_NVRAM_HKEY_GROUP_HK2 = TP_ACPI_HKEY_THINKPAD_MASK |
1064 TP_ACPI_HKEY_ZOOM_MASK |
1065 TP_ACPI_HKEY_DISPSWTCH_MASK |
1066 TP_ACPI_HKEY_HIBERNATE_MASK,
1067 TP_NVRAM_HKEY_GROUP_BRIGHTNESS = TP_ACPI_HKEY_BRGHTUP_MASK |
1068 TP_ACPI_HKEY_BRGHTDWN_MASK,
1069 TP_NVRAM_HKEY_GROUP_VOLUME = TP_ACPI_HKEY_VOLUP_MASK |
1070 TP_ACPI_HKEY_VOLDWN_MASK |
1071 TP_ACPI_HKEY_MUTE_MASK,
1072 };
1073
1074 #ifdef CONFIG_THINKPAD_ACPI_HOTKEY_POLL
1075 struct tp_nvram_state {
1076 u16 thinkpad_toggle:1;
1077 u16 zoom_toggle:1;
1078 u16 display_toggle:1;
1079 u16 thinklight_toggle:1;
1080 u16 hibernate_toggle:1;
1081 u16 displayexp_toggle:1;
1082 u16 display_state:1;
1083 u16 brightness_toggle:1;
1084 u16 volume_toggle:1;
1085 u16 mute:1;
1086
1087 u8 brightness_level;
1088 u8 volume_level;
1089 };
1090
1091 static struct task_struct *tpacpi_hotkey_task;
1092 static u32 hotkey_source_mask; /* bit mask 0=ACPI,1=NVRAM */
1093 static int hotkey_poll_freq = 10; /* Hz */
1094 static struct mutex hotkey_thread_mutex;
1095 static struct mutex hotkey_thread_data_mutex;
1096 static unsigned int hotkey_config_change;
1097
1098 #else /* CONFIG_THINKPAD_ACPI_HOTKEY_POLL */
1099
1100 #define hotkey_source_mask 0U
1101
1102 #endif /* CONFIG_THINKPAD_ACPI_HOTKEY_POLL */
1103
1104 static struct mutex hotkey_mutex;
1105
1106 static enum { /* Reasons for waking up */
1107 TP_ACPI_WAKEUP_NONE = 0, /* None or unknown */
1108 TP_ACPI_WAKEUP_BAYEJ, /* Bay ejection request */
1109 TP_ACPI_WAKEUP_UNDOCK, /* Undock request */
1110 } hotkey_wakeup_reason;
1111
1112 static int hotkey_autosleep_ack;
1113
1114 static int hotkey_orig_status;
1115 static u32 hotkey_orig_mask;
1116 static u32 hotkey_all_mask;
1117 static u32 hotkey_reserved_mask;
1118 static u32 hotkey_mask;
1119
1120 static unsigned int hotkey_report_mode;
1121
1122 static u16 *hotkey_keycode_map;
1123
1124 static struct attribute_set *hotkey_dev_attributes;
1125
1126 #ifdef CONFIG_THINKPAD_ACPI_HOTKEY_POLL
1127 #define HOTKEY_CONFIG_CRITICAL_START \
1128 do { \
1129 mutex_lock(&hotkey_thread_data_mutex); \
1130 hotkey_config_change++; \
1131 } while (0);
1132 #define HOTKEY_CONFIG_CRITICAL_END \
1133 mutex_unlock(&hotkey_thread_data_mutex);
1134 #else
1135 #define HOTKEY_CONFIG_CRITICAL_START
1136 #define HOTKEY_CONFIG_CRITICAL_END
1137 #endif /* CONFIG_THINKPAD_ACPI_HOTKEY_POLL */
1138
1139 /* HKEY.MHKG() return bits */
1140 #define TP_HOTKEY_TABLET_MASK (1 << 3)
1141
1142 static int hotkey_get_wlsw(int *status)
1143 {
1144 if (!acpi_evalf(hkey_handle, status, "WLSW", "d"))
1145 return -EIO;
1146 return 0;
1147 }
1148
1149 static int hotkey_get_tablet_mode(int *status)
1150 {
1151 int s;
1152
1153 if (!acpi_evalf(hkey_handle, &s, "MHKG", "d"))
1154 return -EIO;
1155
1156 *status = ((s & TP_HOTKEY_TABLET_MASK) != 0);
1157 return 0;
1158 }
1159
1160 /*
1161 * Call with hotkey_mutex held
1162 */
1163 static int hotkey_mask_get(void)
1164 {
1165 u32 m = 0;
1166
1167 if (tp_features.hotkey_mask) {
1168 if (!acpi_evalf(hkey_handle, &m, "DHKN", "d"))
1169 return -EIO;
1170 }
1171 hotkey_mask = m | (hotkey_source_mask & hotkey_mask);
1172
1173 return 0;
1174 }
1175
1176 /*
1177 * Call with hotkey_mutex held
1178 */
1179 static int hotkey_mask_set(u32 mask)
1180 {
1181 int i;
1182 int rc = 0;
1183
1184 if (tp_features.hotkey_mask) {
1185 HOTKEY_CONFIG_CRITICAL_START
1186 for (i = 0; i < 32; i++) {
1187 u32 m = 1 << i;
1188 /* enable in firmware mask only keys not in NVRAM
1189 * mode, but enable the key in the cached hotkey_mask
1190 * regardless of mode, or the key will end up
1191 * disabled by hotkey_mask_get() */
1192 if (!acpi_evalf(hkey_handle,
1193 NULL, "MHKM", "vdd", i + 1,
1194 !!((mask & ~hotkey_source_mask) & m))) {
1195 rc = -EIO;
1196 break;
1197 } else {
1198 hotkey_mask = (hotkey_mask & ~m) | (mask & m);
1199 }
1200 }
1201 HOTKEY_CONFIG_CRITICAL_END
1202
1203 /* hotkey_mask_get must be called unconditionally below */
1204 if (!hotkey_mask_get() && !rc &&
1205 (hotkey_mask & ~hotkey_source_mask) !=
1206 (mask & ~hotkey_source_mask)) {
1207 printk(TPACPI_NOTICE
1208 "requested hot key mask 0x%08x, but "
1209 "firmware forced it to 0x%08x\n",
1210 mask, hotkey_mask);
1211 }
1212 } else {
1213 #ifdef CONFIG_THINKPAD_ACPI_HOTKEY_POLL
1214 HOTKEY_CONFIG_CRITICAL_START
1215 hotkey_mask = mask & hotkey_source_mask;
1216 HOTKEY_CONFIG_CRITICAL_END
1217 hotkey_mask_get();
1218 if (hotkey_mask != mask) {
1219 printk(TPACPI_NOTICE
1220 "requested hot key mask 0x%08x, "
1221 "forced to 0x%08x (NVRAM poll mask is "
1222 "0x%08x): no firmware mask support\n",
1223 mask, hotkey_mask, hotkey_source_mask);
1224 }
1225 #else
1226 hotkey_mask_get();
1227 rc = -ENXIO;
1228 #endif /* CONFIG_THINKPAD_ACPI_HOTKEY_POLL */
1229 }
1230
1231 return rc;
1232 }
1233
1234 static int hotkey_status_get(int *status)
1235 {
1236 if (!acpi_evalf(hkey_handle, status, "DHKC", "d"))
1237 return -EIO;
1238
1239 return 0;
1240 }
1241
1242 static int hotkey_status_set(int status)
1243 {
1244 if (!acpi_evalf(hkey_handle, NULL, "MHKC", "vd", status))
1245 return -EIO;
1246
1247 return 0;
1248 }
1249
1250 static void tpacpi_input_send_radiosw(void)
1251 {
1252 int wlsw;
1253
1254 if (tp_features.hotkey_wlsw && !hotkey_get_wlsw(&wlsw)) {
1255 mutex_lock(&tpacpi_inputdev_send_mutex);
1256
1257 input_report_switch(tpacpi_inputdev,
1258 SW_RADIO, !!wlsw);
1259 input_sync(tpacpi_inputdev);
1260
1261 mutex_unlock(&tpacpi_inputdev_send_mutex);
1262 }
1263 }
1264
1265 static void tpacpi_input_send_tabletsw(void)
1266 {
1267 int state;
1268
1269 if (tp_features.hotkey_tablet &&
1270 !hotkey_get_tablet_mode(&state)) {
1271 mutex_lock(&tpacpi_inputdev_send_mutex);
1272
1273 input_report_switch(tpacpi_inputdev,
1274 SW_TABLET_MODE, !!state);
1275 input_sync(tpacpi_inputdev);
1276
1277 mutex_unlock(&tpacpi_inputdev_send_mutex);
1278 }
1279 }
1280
1281 static void tpacpi_input_send_key(unsigned int scancode)
1282 {
1283 unsigned int keycode;
1284
1285 keycode = hotkey_keycode_map[scancode];
1286
1287 if (keycode != KEY_RESERVED) {
1288 mutex_lock(&tpacpi_inputdev_send_mutex);
1289
1290 input_report_key(tpacpi_inputdev, keycode, 1);
1291 if (keycode == KEY_UNKNOWN)
1292 input_event(tpacpi_inputdev, EV_MSC, MSC_SCAN,
1293 scancode);
1294 input_sync(tpacpi_inputdev);
1295
1296 input_report_key(tpacpi_inputdev, keycode, 0);
1297 if (keycode == KEY_UNKNOWN)
1298 input_event(tpacpi_inputdev, EV_MSC, MSC_SCAN,
1299 scancode);
1300 input_sync(tpacpi_inputdev);
1301
1302 mutex_unlock(&tpacpi_inputdev_send_mutex);
1303 }
1304 }
1305
1306 #ifdef CONFIG_THINKPAD_ACPI_HOTKEY_POLL
1307 static struct tp_acpi_drv_struct ibm_hotkey_acpidriver;
1308
1309 static void tpacpi_hotkey_send_key(unsigned int scancode)
1310 {
1311 tpacpi_input_send_key(scancode);
1312 if (hotkey_report_mode < 2) {
1313 acpi_bus_generate_proc_event(ibm_hotkey_acpidriver.device,
1314 0x80, 0x1001 + scancode);
1315 }
1316 }
1317
1318 static void hotkey_read_nvram(struct tp_nvram_state *n, u32 m)
1319 {
1320 u8 d;
1321
1322 if (m & TP_NVRAM_HKEY_GROUP_HK2) {
1323 d = nvram_read_byte(TP_NVRAM_ADDR_HK2);
1324 n->thinkpad_toggle = !!(d & TP_NVRAM_MASK_HKT_THINKPAD);
1325 n->zoom_toggle = !!(d & TP_NVRAM_MASK_HKT_ZOOM);
1326 n->display_toggle = !!(d & TP_NVRAM_MASK_HKT_DISPLAY);
1327 n->hibernate_toggle = !!(d & TP_NVRAM_MASK_HKT_HIBERNATE);
1328 }
1329 if (m & TP_ACPI_HKEY_THNKLGHT_MASK) {
1330 d = nvram_read_byte(TP_NVRAM_ADDR_THINKLIGHT);
1331 n->thinklight_toggle = !!(d & TP_NVRAM_MASK_THINKLIGHT);
1332 }
1333 if (m & TP_ACPI_HKEY_DISPXPAND_MASK) {
1334 d = nvram_read_byte(TP_NVRAM_ADDR_VIDEO);
1335 n->displayexp_toggle =
1336 !!(d & TP_NVRAM_MASK_HKT_DISPEXPND);
1337 }
1338 if (m & TP_NVRAM_HKEY_GROUP_BRIGHTNESS) {
1339 d = nvram_read_byte(TP_NVRAM_ADDR_BRIGHTNESS);
1340 n->brightness_level = (d & TP_NVRAM_MASK_LEVEL_BRIGHTNESS)
1341 >> TP_NVRAM_POS_LEVEL_BRIGHTNESS;
1342 n->brightness_toggle =
1343 !!(d & TP_NVRAM_MASK_HKT_BRIGHTNESS);
1344 }
1345 if (m & TP_NVRAM_HKEY_GROUP_VOLUME) {
1346 d = nvram_read_byte(TP_NVRAM_ADDR_MIXER);
1347 n->volume_level = (d & TP_NVRAM_MASK_LEVEL_VOLUME)
1348 >> TP_NVRAM_POS_LEVEL_VOLUME;
1349 n->mute = !!(d & TP_NVRAM_MASK_MUTE);
1350 n->volume_toggle = !!(d & TP_NVRAM_MASK_HKT_VOLUME);
1351 }
1352 }
1353
1354 #define TPACPI_COMPARE_KEY(__scancode, __member) \
1355 do { \
1356 if ((mask & (1 << __scancode)) && \
1357 oldn->__member != newn->__member) \
1358 tpacpi_hotkey_send_key(__scancode); \
1359 } while (0)
1360
1361 #define TPACPI_MAY_SEND_KEY(__scancode) \
1362 do { if (mask & (1 << __scancode)) \
1363 tpacpi_hotkey_send_key(__scancode); } while (0)
1364
1365 static void hotkey_compare_and_issue_event(struct tp_nvram_state *oldn,
1366 struct tp_nvram_state *newn,
1367 u32 mask)
1368 {
1369 TPACPI_COMPARE_KEY(TP_ACPI_HOTKEYSCAN_THINKPAD, thinkpad_toggle);
1370 TPACPI_COMPARE_KEY(TP_ACPI_HOTKEYSCAN_FNSPACE, zoom_toggle);
1371 TPACPI_COMPARE_KEY(TP_ACPI_HOTKEYSCAN_FNF7, display_toggle);
1372 TPACPI_COMPARE_KEY(TP_ACPI_HOTKEYSCAN_FNF12, hibernate_toggle);
1373
1374 TPACPI_COMPARE_KEY(TP_ACPI_HOTKEYSCAN_FNPAGEUP, thinklight_toggle);
1375
1376 TPACPI_COMPARE_KEY(TP_ACPI_HOTKEYSCAN_FNF8, displayexp_toggle);
1377
1378 /* handle volume */
1379 if (oldn->volume_toggle != newn->volume_toggle) {
1380 if (oldn->mute != newn->mute) {
1381 TPACPI_MAY_SEND_KEY(TP_ACPI_HOTKEYSCAN_MUTE);
1382 }
1383 if (oldn->volume_level > newn->volume_level) {
1384 TPACPI_MAY_SEND_KEY(TP_ACPI_HOTKEYSCAN_VOLUMEDOWN);
1385 } else if (oldn->volume_level < newn->volume_level) {
1386 TPACPI_MAY_SEND_KEY(TP_ACPI_HOTKEYSCAN_VOLUMEUP);
1387 } else if (oldn->mute == newn->mute) {
1388 /* repeated key presses that didn't change state */
1389 if (newn->mute) {
1390 TPACPI_MAY_SEND_KEY(TP_ACPI_HOTKEYSCAN_MUTE);
1391 } else if (newn->volume_level != 0) {
1392 TPACPI_MAY_SEND_KEY(TP_ACPI_HOTKEYSCAN_VOLUMEUP);
1393 } else {
1394 TPACPI_MAY_SEND_KEY(TP_ACPI_HOTKEYSCAN_VOLUMEDOWN);
1395 }
1396 }
1397 }
1398
1399 /* handle brightness */
1400 if (oldn->brightness_toggle != newn->brightness_toggle) {
1401 if (oldn->brightness_level < newn->brightness_level) {
1402 TPACPI_MAY_SEND_KEY(TP_ACPI_HOTKEYSCAN_FNHOME);
1403 } else if (oldn->brightness_level > newn->brightness_level) {
1404 TPACPI_MAY_SEND_KEY(TP_ACPI_HOTKEYSCAN_FNEND);
1405 } else {
1406 /* repeated key presses that didn't change state */
1407 if (newn->brightness_level != 0) {
1408 TPACPI_MAY_SEND_KEY(TP_ACPI_HOTKEYSCAN_FNHOME);
1409 } else {
1410 TPACPI_MAY_SEND_KEY(TP_ACPI_HOTKEYSCAN_FNEND);
1411 }
1412 }
1413 }
1414 }
1415
1416 #undef TPACPI_COMPARE_KEY
1417 #undef TPACPI_MAY_SEND_KEY
1418
1419 static int hotkey_kthread(void *data)
1420 {
1421 struct tp_nvram_state s[2];
1422 u32 mask;
1423 unsigned int si, so;
1424 unsigned long t;
1425 unsigned int change_detector, must_reset;
1426
1427 mutex_lock(&hotkey_thread_mutex);
1428
1429 if (tpacpi_lifecycle == TPACPI_LIFE_EXITING)
1430 goto exit;
1431
1432 set_freezable();
1433
1434 so = 0;
1435 si = 1;
1436 t = 0;
1437
1438 /* Initial state for compares */
1439 mutex_lock(&hotkey_thread_data_mutex);
1440 change_detector = hotkey_config_change;
1441 mask = hotkey_source_mask & hotkey_mask;
1442 mutex_unlock(&hotkey_thread_data_mutex);
1443 hotkey_read_nvram(&s[so], mask);
1444
1445 while (!kthread_should_stop() && hotkey_poll_freq) {
1446 if (t == 0)
1447 t = 1000/hotkey_poll_freq;
1448 t = msleep_interruptible(t);
1449 if (unlikely(kthread_should_stop()))
1450 break;
1451 must_reset = try_to_freeze();
1452 if (t > 0 && !must_reset)
1453 continue;
1454
1455 mutex_lock(&hotkey_thread_data_mutex);
1456 if (must_reset || hotkey_config_change != change_detector) {
1457 /* forget old state on thaw or config change */
1458 si = so;
1459 t = 0;
1460 change_detector = hotkey_config_change;
1461 }
1462 mask = hotkey_source_mask & hotkey_mask;
1463 mutex_unlock(&hotkey_thread_data_mutex);
1464
1465 if (likely(mask)) {
1466 hotkey_read_nvram(&s[si], mask);
1467 if (likely(si != so)) {
1468 hotkey_compare_and_issue_event(&s[so], &s[si],
1469 mask);
1470 }
1471 }
1472
1473 so = si;
1474 si ^= 1;
1475 }
1476
1477 exit:
1478 mutex_unlock(&hotkey_thread_mutex);
1479 return 0;
1480 }
1481
1482 static void hotkey_poll_stop_sync(void)
1483 {
1484 if (tpacpi_hotkey_task) {
1485 if (frozen(tpacpi_hotkey_task) ||
1486 freezing(tpacpi_hotkey_task))
1487 thaw_process(tpacpi_hotkey_task);
1488
1489 kthread_stop(tpacpi_hotkey_task);
1490 tpacpi_hotkey_task = NULL;
1491 mutex_lock(&hotkey_thread_mutex);
1492 /* at this point, the thread did exit */
1493 mutex_unlock(&hotkey_thread_mutex);
1494 }
1495 }
1496
1497 /* call with hotkey_mutex held */
1498 static void hotkey_poll_setup(int may_warn)
1499 {
1500 if ((hotkey_source_mask & hotkey_mask) != 0 &&
1501 hotkey_poll_freq > 0 &&
1502 (tpacpi_inputdev->users > 0 || hotkey_report_mode < 2)) {
1503 if (!tpacpi_hotkey_task) {
1504 tpacpi_hotkey_task = kthread_run(hotkey_kthread,
1505 NULL,
1506 TPACPI_FILE "d");
1507 if (IS_ERR(tpacpi_hotkey_task)) {
1508 tpacpi_hotkey_task = NULL;
1509 printk(TPACPI_ERR
1510 "could not create kernel thread "
1511 "for hotkey polling\n");
1512 }
1513 }
1514 } else {
1515 hotkey_poll_stop_sync();
1516 if (may_warn &&
1517 hotkey_source_mask != 0 && hotkey_poll_freq == 0) {
1518 printk(TPACPI_NOTICE
1519 "hot keys 0x%08x require polling, "
1520 "which is currently disabled\n",
1521 hotkey_source_mask);
1522 }
1523 }
1524 }
1525
1526 static void hotkey_poll_setup_safe(int may_warn)
1527 {
1528 mutex_lock(&hotkey_mutex);
1529 hotkey_poll_setup(may_warn);
1530 mutex_unlock(&hotkey_mutex);
1531 }
1532
1533 #else /* CONFIG_THINKPAD_ACPI_HOTKEY_POLL */
1534
1535 static void hotkey_poll_setup_safe(int __unused)
1536 {
1537 }
1538
1539 #endif /* CONFIG_THINKPAD_ACPI_HOTKEY_POLL */
1540
1541 static int hotkey_inputdev_open(struct input_dev *dev)
1542 {
1543 switch (tpacpi_lifecycle) {
1544 case TPACPI_LIFE_INIT:
1545 /*
1546 * hotkey_init will call hotkey_poll_setup_safe
1547 * at the appropriate moment
1548 */
1549 return 0;
1550 case TPACPI_LIFE_EXITING:
1551 return -EBUSY;
1552 case TPACPI_LIFE_RUNNING:
1553 hotkey_poll_setup_safe(0);
1554 return 0;
1555 }
1556
1557 /* Should only happen if tpacpi_lifecycle is corrupt */
1558 BUG();
1559 return -EBUSY;
1560 }
1561
1562 static void hotkey_inputdev_close(struct input_dev *dev)
1563 {
1564 /* disable hotkey polling when possible */
1565 if (tpacpi_lifecycle == TPACPI_LIFE_RUNNING)
1566 hotkey_poll_setup_safe(0);
1567 }
1568
1569 /* sysfs hotkey enable ------------------------------------------------- */
1570 static ssize_t hotkey_enable_show(struct device *dev,
1571 struct device_attribute *attr,
1572 char *buf)
1573 {
1574 int res, status;
1575
1576 res = hotkey_status_get(&status);
1577 if (res)
1578 return res;
1579
1580 return snprintf(buf, PAGE_SIZE, "%d\n", status);
1581 }
1582
1583 static ssize_t hotkey_enable_store(struct device *dev,
1584 struct device_attribute *attr,
1585 const char *buf, size_t count)
1586 {
1587 unsigned long t;
1588 int res;
1589
1590 if (parse_strtoul(buf, 1, &t))
1591 return -EINVAL;
1592
1593 res = hotkey_status_set(t);
1594
1595 return (res) ? res : count;
1596 }
1597
1598 static struct device_attribute dev_attr_hotkey_enable =
1599 __ATTR(hotkey_enable, S_IWUSR | S_IRUGO,
1600 hotkey_enable_show, hotkey_enable_store);
1601
1602 /* sysfs hotkey mask --------------------------------------------------- */
1603 static ssize_t hotkey_mask_show(struct device *dev,
1604 struct device_attribute *attr,
1605 char *buf)
1606 {
1607 int res;
1608
1609 if (mutex_lock_interruptible(&hotkey_mutex))
1610 return -ERESTARTSYS;
1611 res = hotkey_mask_get();
1612 mutex_unlock(&hotkey_mutex);
1613
1614 return (res)?
1615 res : snprintf(buf, PAGE_SIZE, "0x%08x\n", hotkey_mask);
1616 }
1617
1618 static ssize_t hotkey_mask_store(struct device *dev,
1619 struct device_attribute *attr,
1620 const char *buf, size_t count)
1621 {
1622 unsigned long t;
1623 int res;
1624
1625 if (parse_strtoul(buf, 0xffffffffUL, &t))
1626 return -EINVAL;
1627
1628 if (mutex_lock_interruptible(&hotkey_mutex))
1629 return -ERESTARTSYS;
1630
1631 res = hotkey_mask_set(t);
1632
1633 #ifdef CONFIG_THINKPAD_ACPI_HOTKEY_POLL
1634 hotkey_poll_setup(1);
1635 #endif
1636
1637 mutex_unlock(&hotkey_mutex);
1638
1639 return (res) ? res : count;
1640 }
1641
1642 static struct device_attribute dev_attr_hotkey_mask =
1643 __ATTR(hotkey_mask, S_IWUSR | S_IRUGO,
1644 hotkey_mask_show, hotkey_mask_store);
1645
1646 /* sysfs hotkey bios_enabled ------------------------------------------- */
1647 static ssize_t hotkey_bios_enabled_show(struct device *dev,
1648 struct device_attribute *attr,
1649 char *buf)
1650 {
1651 return snprintf(buf, PAGE_SIZE, "%d\n", hotkey_orig_status);
1652 }
1653
1654 static struct device_attribute dev_attr_hotkey_bios_enabled =
1655 __ATTR(hotkey_bios_enabled, S_IRUGO, hotkey_bios_enabled_show, NULL);
1656
1657 /* sysfs hotkey bios_mask ---------------------------------------------- */
1658 static ssize_t hotkey_bios_mask_show(struct device *dev,
1659 struct device_attribute *attr,
1660 char *buf)
1661 {
1662 return snprintf(buf, PAGE_SIZE, "0x%08x\n", hotkey_orig_mask);
1663 }
1664
1665 static struct device_attribute dev_attr_hotkey_bios_mask =
1666 __ATTR(hotkey_bios_mask, S_IRUGO, hotkey_bios_mask_show, NULL);
1667
1668 /* sysfs hotkey all_mask ----------------------------------------------- */
1669 static ssize_t hotkey_all_mask_show(struct device *dev,
1670 struct device_attribute *attr,
1671 char *buf)
1672 {
1673 return snprintf(buf, PAGE_SIZE, "0x%08x\n",
1674 hotkey_all_mask | hotkey_source_mask);
1675 }
1676
1677 static struct device_attribute dev_attr_hotkey_all_mask =
1678 __ATTR(hotkey_all_mask, S_IRUGO, hotkey_all_mask_show, NULL);
1679
1680 /* sysfs hotkey recommended_mask --------------------------------------- */
1681 static ssize_t hotkey_recommended_mask_show(struct device *dev,
1682 struct device_attribute *attr,
1683 char *buf)
1684 {
1685 return snprintf(buf, PAGE_SIZE, "0x%08x\n",
1686 (hotkey_all_mask | hotkey_source_mask)
1687 & ~hotkey_reserved_mask);
1688 }
1689
1690 static struct device_attribute dev_attr_hotkey_recommended_mask =
1691 __ATTR(hotkey_recommended_mask, S_IRUGO,
1692 hotkey_recommended_mask_show, NULL);
1693
1694 #ifdef CONFIG_THINKPAD_ACPI_HOTKEY_POLL
1695
1696 /* sysfs hotkey hotkey_source_mask ------------------------------------- */
1697 static ssize_t hotkey_source_mask_show(struct device *dev,
1698 struct device_attribute *attr,
1699 char *buf)
1700 {
1701 return snprintf(buf, PAGE_SIZE, "0x%08x\n", hotkey_source_mask);
1702 }
1703
1704 static ssize_t hotkey_source_mask_store(struct device *dev,
1705 struct device_attribute *attr,
1706 const char *buf, size_t count)
1707 {
1708 unsigned long t;
1709
1710 if (parse_strtoul(buf, 0xffffffffUL, &t) ||
1711 ((t & ~TPACPI_HKEY_NVRAM_KNOWN_MASK) != 0))
1712 return -EINVAL;
1713
1714 if (mutex_lock_interruptible(&hotkey_mutex))
1715 return -ERESTARTSYS;
1716
1717 HOTKEY_CONFIG_CRITICAL_START
1718 hotkey_source_mask = t;
1719 HOTKEY_CONFIG_CRITICAL_END
1720
1721 hotkey_poll_setup(1);
1722
1723 mutex_unlock(&hotkey_mutex);
1724
1725 return count;
1726 }
1727
1728 static struct device_attribute dev_attr_hotkey_source_mask =
1729 __ATTR(hotkey_source_mask, S_IWUSR | S_IRUGO,
1730 hotkey_source_mask_show, hotkey_source_mask_store);
1731
1732 /* sysfs hotkey hotkey_poll_freq --------------------------------------- */
1733 static ssize_t hotkey_poll_freq_show(struct device *dev,
1734 struct device_attribute *attr,
1735 char *buf)
1736 {
1737 return snprintf(buf, PAGE_SIZE, "%d\n", hotkey_poll_freq);
1738 }
1739
1740 static ssize_t hotkey_poll_freq_store(struct device *dev,
1741 struct device_attribute *attr,
1742 const char *buf, size_t count)
1743 {
1744 unsigned long t;
1745
1746 if (parse_strtoul(buf, 25, &t))
1747 return -EINVAL;
1748
1749 if (mutex_lock_interruptible(&hotkey_mutex))
1750 return -ERESTARTSYS;
1751
1752 hotkey_poll_freq = t;
1753
1754 hotkey_poll_setup(1);
1755 mutex_unlock(&hotkey_mutex);
1756
1757 return count;
1758 }
1759
1760 static struct device_attribute dev_attr_hotkey_poll_freq =
1761 __ATTR(hotkey_poll_freq, S_IWUSR | S_IRUGO,
1762 hotkey_poll_freq_show, hotkey_poll_freq_store);
1763
1764 #endif /* CONFIG_THINKPAD_ACPI_HOTKEY_POLL */
1765
1766 /* sysfs hotkey radio_sw (pollable) ------------------------------------ */
1767 static ssize_t hotkey_radio_sw_show(struct device *dev,
1768 struct device_attribute *attr,
1769 char *buf)
1770 {
1771 int res, s;
1772 res = hotkey_get_wlsw(&s);
1773 if (res < 0)
1774 return res;
1775
1776 return snprintf(buf, PAGE_SIZE, "%d\n", !!s);
1777 }
1778
1779 static struct device_attribute dev_attr_hotkey_radio_sw =
1780 __ATTR(hotkey_radio_sw, S_IRUGO, hotkey_radio_sw_show, NULL);
1781
1782 static void hotkey_radio_sw_notify_change(void)
1783 {
1784 if (tp_features.hotkey_wlsw)
1785 sysfs_notify(&tpacpi_pdev->dev.kobj, NULL,
1786 "hotkey_radio_sw");
1787 }
1788
1789 /* sysfs hotkey tablet mode (pollable) --------------------------------- */
1790 static ssize_t hotkey_tablet_mode_show(struct device *dev,
1791 struct device_attribute *attr,
1792 char *buf)
1793 {
1794 int res, s;
1795 res = hotkey_get_tablet_mode(&s);
1796 if (res < 0)
1797 return res;
1798
1799 return snprintf(buf, PAGE_SIZE, "%d\n", !!s);
1800 }
1801
1802 static struct device_attribute dev_attr_hotkey_tablet_mode =
1803 __ATTR(hotkey_tablet_mode, S_IRUGO, hotkey_tablet_mode_show, NULL);
1804
1805 static void hotkey_tablet_mode_notify_change(void)
1806 {
1807 if (tp_features.hotkey_tablet)
1808 sysfs_notify(&tpacpi_pdev->dev.kobj, NULL,
1809 "hotkey_tablet_mode");
1810 }
1811
1812 /* sysfs hotkey report_mode -------------------------------------------- */
1813 static ssize_t hotkey_report_mode_show(struct device *dev,
1814 struct device_attribute *attr,
1815 char *buf)
1816 {
1817 return snprintf(buf, PAGE_SIZE, "%d\n",
1818 (hotkey_report_mode != 0) ? hotkey_report_mode : 1);
1819 }
1820
1821 static struct device_attribute dev_attr_hotkey_report_mode =
1822 __ATTR(hotkey_report_mode, S_IRUGO, hotkey_report_mode_show, NULL);
1823
1824 /* sysfs wakeup reason (pollable) -------------------------------------- */
1825 static ssize_t hotkey_wakeup_reason_show(struct device *dev,
1826 struct device_attribute *attr,
1827 char *buf)
1828 {
1829 return snprintf(buf, PAGE_SIZE, "%d\n", hotkey_wakeup_reason);
1830 }
1831
1832 static struct device_attribute dev_attr_hotkey_wakeup_reason =
1833 __ATTR(wakeup_reason, S_IRUGO, hotkey_wakeup_reason_show, NULL);
1834
1835 static void hotkey_wakeup_reason_notify_change(void)
1836 {
1837 if (tp_features.hotkey_mask)
1838 sysfs_notify(&tpacpi_pdev->dev.kobj, NULL,
1839 "wakeup_reason");
1840 }
1841
1842 /* sysfs wakeup hotunplug_complete (pollable) -------------------------- */
1843 static ssize_t hotkey_wakeup_hotunplug_complete_show(struct device *dev,
1844 struct device_attribute *attr,
1845 char *buf)
1846 {
1847 return snprintf(buf, PAGE_SIZE, "%d\n", hotkey_autosleep_ack);
1848 }
1849
1850 static struct device_attribute dev_attr_hotkey_wakeup_hotunplug_complete =
1851 __ATTR(wakeup_hotunplug_complete, S_IRUGO,
1852 hotkey_wakeup_hotunplug_complete_show, NULL);
1853
1854 static void hotkey_wakeup_hotunplug_complete_notify_change(void)
1855 {
1856 if (tp_features.hotkey_mask)
1857 sysfs_notify(&tpacpi_pdev->dev.kobj, NULL,
1858 "wakeup_hotunplug_complete");
1859 }
1860
1861 /* --------------------------------------------------------------------- */
1862
1863 static struct attribute *hotkey_attributes[] __initdata = {
1864 &dev_attr_hotkey_enable.attr,
1865 &dev_attr_hotkey_bios_enabled.attr,
1866 &dev_attr_hotkey_report_mode.attr,
1867 #ifdef CONFIG_THINKPAD_ACPI_HOTKEY_POLL
1868 &dev_attr_hotkey_mask.attr,
1869 &dev_attr_hotkey_all_mask.attr,
1870 &dev_attr_hotkey_recommended_mask.attr,
1871 &dev_attr_hotkey_source_mask.attr,
1872 &dev_attr_hotkey_poll_freq.attr,
1873 #endif
1874 };
1875
1876 static struct attribute *hotkey_mask_attributes[] __initdata = {
1877 &dev_attr_hotkey_bios_mask.attr,
1878 #ifndef CONFIG_THINKPAD_ACPI_HOTKEY_POLL
1879 &dev_attr_hotkey_mask.attr,
1880 &dev_attr_hotkey_all_mask.attr,
1881 &dev_attr_hotkey_recommended_mask.attr,
1882 #endif
1883 &dev_attr_hotkey_wakeup_reason.attr,
1884 &dev_attr_hotkey_wakeup_hotunplug_complete.attr,
1885 };
1886
1887 static int __init hotkey_init(struct ibm_init_struct *iibm)
1888 {
1889 /* Requirements for changing the default keymaps:
1890 *
1891 * 1. Many of the keys are mapped to KEY_RESERVED for very
1892 * good reasons. Do not change them unless you have deep
1893 * knowledge on the IBM and Lenovo ThinkPad firmware for
1894 * the various ThinkPad models. The driver behaves
1895 * differently for KEY_RESERVED: such keys have their
1896 * hot key mask *unset* in mask_recommended, and also
1897 * in the initial hot key mask programmed into the
1898 * firmware at driver load time, which means the firm-
1899 * ware may react very differently if you change them to
1900 * something else;
1901 *
1902 * 2. You must be subscribed to the linux-thinkpad and
1903 * ibm-acpi-devel mailing lists, and you should read the
1904 * list archives since 2007 if you want to change the
1905 * keymaps. This requirement exists so that you will
1906 * know the past history of problems with the thinkpad-
1907 * acpi driver keymaps, and also that you will be
1908 * listening to any bug reports;
1909 *
1910 * 3. Do not send thinkpad-acpi specific patches directly to
1911 * for merging, *ever*. Send them to the linux-acpi
1912 * mailinglist for comments. Merging is to be done only
1913 * through acpi-test and the ACPI maintainer.
1914 *
1915 * If the above is too much to ask, don't change the keymap.
1916 * Ask the thinkpad-acpi maintainer to do it, instead.
1917 */
1918 static u16 ibm_keycode_map[] __initdata = {
1919 /* Scan Codes 0x00 to 0x0B: ACPI HKEY FN+F1..F12 */
1920 KEY_FN_F1, KEY_FN_F2, KEY_COFFEE, KEY_SLEEP,
1921 KEY_WLAN, KEY_FN_F6, KEY_SWITCHVIDEOMODE, KEY_FN_F8,
1922 KEY_FN_F9, KEY_FN_F10, KEY_FN_F11, KEY_SUSPEND,
1923
1924 /* Scan codes 0x0C to 0x1F: Other ACPI HKEY hot keys */
1925 KEY_UNKNOWN, /* 0x0C: FN+BACKSPACE */
1926 KEY_UNKNOWN, /* 0x0D: FN+INSERT */
1927 KEY_UNKNOWN, /* 0x0E: FN+DELETE */
1928
1929 /* brightness: firmware always reacts to them, unless
1930 * X.org did some tricks in the radeon BIOS scratch
1931 * registers of *some* models */
1932 KEY_RESERVED, /* 0x0F: FN+HOME (brightness up) */
1933 KEY_RESERVED, /* 0x10: FN+END (brightness down) */
1934
1935 /* Thinklight: firmware always react to it */
1936 KEY_RESERVED, /* 0x11: FN+PGUP (thinklight toggle) */
1937
1938 KEY_UNKNOWN, /* 0x12: FN+PGDOWN */
1939 KEY_ZOOM, /* 0x13: FN+SPACE (zoom) */
1940
1941 /* Volume: firmware always react to it and reprograms
1942 * the built-in *extra* mixer. Never map it to control
1943 * another mixer by default. */
1944 KEY_RESERVED, /* 0x14: VOLUME UP */
1945 KEY_RESERVED, /* 0x15: VOLUME DOWN */
1946 KEY_RESERVED, /* 0x16: MUTE */
1947
1948 KEY_VENDOR, /* 0x17: Thinkpad/AccessIBM/Lenovo */
1949
1950 /* (assignments unknown, please report if found) */
1951 KEY_UNKNOWN, KEY_UNKNOWN, KEY_UNKNOWN, KEY_UNKNOWN,
1952 KEY_UNKNOWN, KEY_UNKNOWN, KEY_UNKNOWN, KEY_UNKNOWN,
1953 };
1954 static u16 lenovo_keycode_map[] __initdata = {
1955 /* Scan Codes 0x00 to 0x0B: ACPI HKEY FN+F1..F12 */
1956 KEY_FN_F1, KEY_COFFEE, KEY_BATTERY, KEY_SLEEP,
1957 KEY_WLAN, KEY_FN_F6, KEY_SWITCHVIDEOMODE, KEY_FN_F8,
1958 KEY_FN_F9, KEY_FN_F10, KEY_FN_F11, KEY_SUSPEND,
1959
1960 /* Scan codes 0x0C to 0x1F: Other ACPI HKEY hot keys */
1961 KEY_UNKNOWN, /* 0x0C: FN+BACKSPACE */
1962 KEY_UNKNOWN, /* 0x0D: FN+INSERT */
1963 KEY_UNKNOWN, /* 0x0E: FN+DELETE */
1964
1965 /* These either have to go through ACPI video, or
1966 * act like in the IBM ThinkPads, so don't ever
1967 * enable them by default */
1968 KEY_RESERVED, /* 0x0F: FN+HOME (brightness up) */
1969 KEY_RESERVED, /* 0x10: FN+END (brightness down) */
1970
1971 KEY_RESERVED, /* 0x11: FN+PGUP (thinklight toggle) */
1972
1973 KEY_UNKNOWN, /* 0x12: FN+PGDOWN */
1974 KEY_ZOOM, /* 0x13: FN+SPACE (zoom) */
1975
1976 /* Volume: z60/z61, T60 (BIOS version?): firmware always
1977 * react to it and reprograms the built-in *extra* mixer.
1978 * Never map it to control another mixer by default.
1979 *
1980 * T60?, T61, R60?, R61: firmware and EC tries to send
1981 * these over the regular keyboard, so these are no-ops,
1982 * but there are still weird bugs re. MUTE, so do not
1983 * change unless you get test reports from all Lenovo
1984 * models. May cause the BIOS to interfere with the
1985 * HDA mixer.
1986 */
1987 KEY_RESERVED, /* 0x14: VOLUME UP */
1988 KEY_RESERVED, /* 0x15: VOLUME DOWN */
1989 KEY_RESERVED, /* 0x16: MUTE */
1990
1991 KEY_VENDOR, /* 0x17: Thinkpad/AccessIBM/Lenovo */
1992
1993 /* (assignments unknown, please report if found) */
1994 KEY_UNKNOWN, KEY_UNKNOWN, KEY_UNKNOWN, KEY_UNKNOWN,
1995 KEY_UNKNOWN, KEY_UNKNOWN, KEY_UNKNOWN, KEY_UNKNOWN,
1996 };
1997
1998 #define TPACPI_HOTKEY_MAP_LEN ARRAY_SIZE(ibm_keycode_map)
1999 #define TPACPI_HOTKEY_MAP_SIZE sizeof(ibm_keycode_map)
2000 #define TPACPI_HOTKEY_MAP_TYPESIZE sizeof(ibm_keycode_map[0])
2001
2002 int res, i;
2003 int status;
2004 int hkeyv;
2005
2006 vdbg_printk(TPACPI_DBG_INIT, "initializing hotkey subdriver\n");
2007
2008 BUG_ON(!tpacpi_inputdev);
2009 BUG_ON(tpacpi_inputdev->open != NULL ||
2010 tpacpi_inputdev->close != NULL);
2011
2012 TPACPI_ACPIHANDLE_INIT(hkey);
2013 mutex_init(&hotkey_mutex);
2014
2015 #ifdef CONFIG_THINKPAD_ACPI_HOTKEY_POLL
2016 mutex_init(&hotkey_thread_mutex);
2017 mutex_init(&hotkey_thread_data_mutex);
2018 #endif
2019
2020 /* hotkey not supported on 570 */
2021 tp_features.hotkey = hkey_handle != NULL;
2022
2023 vdbg_printk(TPACPI_DBG_INIT, "hotkeys are %s\n",
2024 str_supported(tp_features.hotkey));
2025
2026 if (tp_features.hotkey) {
2027 hotkey_dev_attributes = create_attr_set(13, NULL);
2028 if (!hotkey_dev_attributes)
2029 return -ENOMEM;
2030 res = add_many_to_attr_set(hotkey_dev_attributes,
2031 hotkey_attributes,
2032 ARRAY_SIZE(hotkey_attributes));
2033 if (res)
2034 return res;
2035
2036 /* mask not supported on 570, 600e/x, 770e, 770x, A21e, A2xm/p,
2037 A30, R30, R31, T20-22, X20-21, X22-24. Detected by checking
2038 for HKEY interface version 0x100 */
2039 if (acpi_evalf(hkey_handle, &hkeyv, "MHKV", "qd")) {
2040 if ((hkeyv >> 8) != 1) {
2041 printk(TPACPI_ERR "unknown version of the "
2042 "HKEY interface: 0x%x\n", hkeyv);
2043 printk(TPACPI_ERR "please report this to %s\n",
2044 TPACPI_MAIL);
2045 } else {
2046 /*
2047 * MHKV 0x100 in A31, R40, R40e,
2048 * T4x, X31, and later
2049 */
2050 tp_features.hotkey_mask = 1;
2051 }
2052 }
2053
2054 vdbg_printk(TPACPI_DBG_INIT, "hotkey masks are %s\n",
2055 str_supported(tp_features.hotkey_mask));
2056
2057 if (tp_features.hotkey_mask) {
2058 if (!acpi_evalf(hkey_handle, &hotkey_all_mask,
2059 "MHKA", "qd")) {
2060 printk(TPACPI_ERR
2061 "missing MHKA handler, "
2062 "please report this to %s\n",
2063 TPACPI_MAIL);
2064 /* FN+F12, FN+F4, FN+F3 */
2065 hotkey_all_mask = 0x080cU;
2066 }
2067 }
2068
2069 /* hotkey_source_mask *must* be zero for
2070 * the first hotkey_mask_get */
2071 res = hotkey_status_get(&hotkey_orig_status);
2072 if (!res && tp_features.hotkey_mask) {
2073 res = hotkey_mask_get();
2074 hotkey_orig_mask = hotkey_mask;
2075 if (!res) {
2076 res = add_many_to_attr_set(
2077 hotkey_dev_attributes,
2078 hotkey_mask_attributes,
2079 ARRAY_SIZE(hotkey_mask_attributes));
2080 }
2081 }
2082
2083 #ifdef CONFIG_THINKPAD_ACPI_HOTKEY_POLL
2084 if (tp_features.hotkey_mask) {
2085 hotkey_source_mask = TPACPI_HKEY_NVRAM_GOOD_MASK
2086 & ~hotkey_all_mask;
2087 } else {
2088 hotkey_source_mask = TPACPI_HKEY_NVRAM_GOOD_MASK;
2089 }
2090
2091 vdbg_printk(TPACPI_DBG_INIT,
2092 "hotkey source mask 0x%08x, polling freq %d\n",
2093 hotkey_source_mask, hotkey_poll_freq);
2094 #endif
2095
2096 /* Not all thinkpads have a hardware radio switch */
2097 if (!res && acpi_evalf(hkey_handle, &status, "WLSW", "qd")) {
2098 tp_features.hotkey_wlsw = 1;
2099 printk(TPACPI_INFO
2100 "radio switch found; radios are %s\n",
2101 enabled(status, 0));
2102 res = add_to_attr_set(hotkey_dev_attributes,
2103 &dev_attr_hotkey_radio_sw.attr);
2104 }
2105
2106 /* For X41t, X60t, X61t Tablets... */
2107 if (!res && acpi_evalf(hkey_handle, &status, "MHKG", "qd")) {
2108 tp_features.hotkey_tablet = 1;
2109 printk(TPACPI_INFO
2110 "possible tablet mode switch found; "
2111 "ThinkPad in %s mode\n",
2112 (status & TP_HOTKEY_TABLET_MASK)?
2113 "tablet" : "laptop");
2114 res = add_to_attr_set(hotkey_dev_attributes,
2115 &dev_attr_hotkey_tablet_mode.attr);
2116 }
2117
2118 if (!res)
2119 res = register_attr_set_with_sysfs(
2120 hotkey_dev_attributes,
2121 &tpacpi_pdev->dev.kobj);
2122 if (res)
2123 return res;
2124
2125 /* Set up key map */
2126
2127 hotkey_keycode_map = kmalloc(TPACPI_HOTKEY_MAP_SIZE,
2128 GFP_KERNEL);
2129 if (!hotkey_keycode_map) {
2130 printk(TPACPI_ERR
2131 "failed to allocate memory for key map\n");
2132 return -ENOMEM;
2133 }
2134
2135 if (thinkpad_id.vendor == PCI_VENDOR_ID_LENOVO) {
2136 dbg_printk(TPACPI_DBG_INIT,
2137 "using Lenovo default hot key map\n");
2138 memcpy(hotkey_keycode_map, &lenovo_keycode_map,
2139 TPACPI_HOTKEY_MAP_SIZE);
2140 } else {
2141 dbg_printk(TPACPI_DBG_INIT,
2142 "using IBM default hot key map\n");
2143 memcpy(hotkey_keycode_map, &ibm_keycode_map,
2144 TPACPI_HOTKEY_MAP_SIZE);
2145 }
2146
2147 set_bit(EV_KEY, tpacpi_inputdev->evbit);
2148 set_bit(EV_MSC, tpacpi_inputdev->evbit);
2149 set_bit(MSC_SCAN, tpacpi_inputdev->mscbit);
2150 tpacpi_inputdev->keycodesize = TPACPI_HOTKEY_MAP_TYPESIZE;
2151 tpacpi_inputdev->keycodemax = TPACPI_HOTKEY_MAP_LEN;
2152 tpacpi_inputdev->keycode = hotkey_keycode_map;
2153 for (i = 0; i < TPACPI_HOTKEY_MAP_LEN; i++) {
2154 if (hotkey_keycode_map[i] != KEY_RESERVED) {
2155 set_bit(hotkey_keycode_map[i],
2156 tpacpi_inputdev->keybit);
2157 } else {
2158 if (i < sizeof(hotkey_reserved_mask)*8)
2159 hotkey_reserved_mask |= 1 << i;
2160 }
2161 }
2162
2163 if (tp_features.hotkey_wlsw) {
2164 set_bit(EV_SW, tpacpi_inputdev->evbit);
2165 set_bit(SW_RADIO, tpacpi_inputdev->swbit);
2166 }
2167 if (tp_features.hotkey_tablet) {
2168 set_bit(EV_SW, tpacpi_inputdev->evbit);
2169 set_bit(SW_TABLET_MODE, tpacpi_inputdev->swbit);
2170 }
2171
2172 /* Do not issue duplicate brightness change events to
2173 * userspace */
2174 if (!tp_features.bright_acpimode)
2175 /* update bright_acpimode... */
2176 tpacpi_check_std_acpi_brightness_support();
2177
2178 if (tp_features.bright_acpimode) {
2179 printk(TPACPI_INFO
2180 "This ThinkPad has standard ACPI backlight "
2181 "brightness control, supported by the ACPI "
2182 "video driver\n");
2183 printk(TPACPI_NOTICE
2184 "Disabling thinkpad-acpi brightness events "
2185 "by default...\n");
2186
2187 /* The hotkey_reserved_mask change below is not
2188 * necessary while the keys are at KEY_RESERVED in the
2189 * default map, but better safe than sorry, leave it
2190 * here as a marker of what we have to do, especially
2191 * when we finally become able to set this at runtime
2192 * on response to X.org requests */
2193 hotkey_reserved_mask |=
2194 (1 << TP_ACPI_HOTKEYSCAN_FNHOME)
2195 | (1 << TP_ACPI_HOTKEYSCAN_FNEND);
2196 }
2197
2198 dbg_printk(TPACPI_DBG_INIT,
2199 "enabling hot key handling\n");
2200 res = hotkey_status_set(1);
2201 if (res)
2202 return res;
2203 res = hotkey_mask_set(((hotkey_all_mask | hotkey_source_mask)
2204 & ~hotkey_reserved_mask)
2205 | hotkey_orig_mask);
2206 if (res < 0 && res != -ENXIO)
2207 return res;
2208
2209 dbg_printk(TPACPI_DBG_INIT,
2210 "legacy hot key reporting over procfs %s\n",
2211 (hotkey_report_mode < 2) ?
2212 "enabled" : "disabled");
2213
2214 tpacpi_inputdev->open = &hotkey_inputdev_open;
2215 tpacpi_inputdev->close = &hotkey_inputdev_close;
2216
2217 hotkey_poll_setup_safe(1);
2218 tpacpi_input_send_radiosw();
2219 tpacpi_input_send_tabletsw();
2220 }
2221
2222 return (tp_features.hotkey)? 0 : 1;
2223 }
2224
2225 static void hotkey_exit(void)
2226 {
2227 #ifdef CONFIG_THINKPAD_ACPI_HOTKEY_POLL
2228 hotkey_poll_stop_sync();
2229 #endif
2230
2231 if (tp_features.hotkey) {
2232 dbg_printk(TPACPI_DBG_EXIT,
2233 "restoring original hot key mask\n");
2234 /* no short-circuit boolean operator below! */
2235 if ((hotkey_mask_set(hotkey_orig_mask) |
2236 hotkey_status_set(hotkey_orig_status)) != 0)
2237 printk(TPACPI_ERR
2238 "failed to restore hot key mask "
2239 "to BIOS defaults\n");
2240 }
2241
2242 if (hotkey_dev_attributes) {
2243 delete_attr_set(hotkey_dev_attributes, &tpacpi_pdev->dev.kobj);
2244 hotkey_dev_attributes = NULL;
2245 }
2246 }
2247
2248 static void hotkey_notify(struct ibm_struct *ibm, u32 event)
2249 {
2250 u32 hkey;
2251 unsigned int scancode;
2252 int send_acpi_ev;
2253 int ignore_acpi_ev;
2254 int unk_ev;
2255
2256 if (event != 0x80) {
2257 printk(TPACPI_ERR
2258 "unknown HKEY notification event %d\n", event);
2259 /* forward it to userspace, maybe it knows how to handle it */
2260 acpi_bus_generate_netlink_event(
2261 ibm->acpi->device->pnp.device_class,
2262 ibm->acpi->device->dev.bus_id,
2263 event, 0);
2264 return;
2265 }
2266
2267 while (1) {
2268 if (!acpi_evalf(hkey_handle, &hkey, "MHKP", "d")) {
2269 printk(TPACPI_ERR "failed to retrieve HKEY event\n");
2270 return;
2271 }
2272
2273 if (hkey == 0) {
2274 /* queue empty */
2275 return;
2276 }
2277
2278 send_acpi_ev = 1;
2279 ignore_acpi_ev = 0;
2280 unk_ev = 0;
2281
2282 switch (hkey >> 12) {
2283 case 1:
2284 /* 0x1000-0x1FFF: key presses */
2285 scancode = hkey & 0xfff;
2286 if (scancode > 0 && scancode < 0x21) {
2287 scancode--;
2288 if (!(hotkey_source_mask & (1 << scancode))) {
2289 tpacpi_input_send_key(scancode);
2290 send_acpi_ev = 0;
2291 } else {
2292 ignore_acpi_ev = 1;
2293 }
2294 } else {
2295 unk_ev = 1;
2296 }
2297 break;
2298 case 2:
2299 /* Wakeup reason */
2300 switch (hkey) {
2301 case 0x2304: /* suspend, undock */
2302 case 0x2404: /* hibernation, undock */
2303 hotkey_wakeup_reason = TP_ACPI_WAKEUP_UNDOCK;
2304 ignore_acpi_ev = 1;
2305 break;
2306 case 0x2305: /* suspend, bay eject */
2307 case 0x2405: /* hibernation, bay eject */
2308 hotkey_wakeup_reason = TP_ACPI_WAKEUP_BAYEJ;
2309 ignore_acpi_ev = 1;
2310 break;
2311 default:
2312 unk_ev = 1;
2313 }
2314 if (hotkey_wakeup_reason != TP_ACPI_WAKEUP_NONE) {
2315 printk(TPACPI_INFO
2316 "woke up due to a hot-unplug "
2317 "request...\n");
2318 hotkey_wakeup_reason_notify_change();
2319 }
2320 break;
2321 case 3:
2322 /* bay-related wakeups */
2323 if (hkey == 0x3003) {
2324 hotkey_autosleep_ack = 1;
2325 printk(TPACPI_INFO
2326 "bay ejected\n");
2327 hotkey_wakeup_hotunplug_complete_notify_change();
2328 } else {
2329 unk_ev = 1;
2330 }
2331 break;
2332 case 4:
2333 /* dock-related wakeups */
2334 if (hkey == 0x4003) {
2335 hotkey_autosleep_ack = 1;
2336 printk(TPACPI_INFO
2337 "undocked\n");
2338 hotkey_wakeup_hotunplug_complete_notify_change();
2339 } else {
2340 unk_ev = 1;
2341 }
2342 break;
2343 case 5:
2344 /* 0x5000-0x5FFF: human interface helpers */
2345 switch (hkey) {
2346 case 0x5010: /* Lenovo new BIOS: brightness changed */
2347 case 0x500b: /* X61t: tablet pen inserted into bay */
2348 case 0x500c: /* X61t: tablet pen removed from bay */
2349 break;
2350 case 0x5009: /* X41t-X61t: swivel up (tablet mode) */
2351 case 0x500a: /* X41t-X61t: swivel down (normal mode) */
2352 tpacpi_input_send_tabletsw();
2353 hotkey_tablet_mode_notify_change();
2354 send_acpi_ev = 0;
2355 break;
2356 case 0x5001:
2357 case 0x5002:
2358 /* LID switch events. Do not propagate */
2359 ignore_acpi_ev = 1;
2360 break;
2361 default:
2362 unk_ev = 1;
2363 }
2364 break;
2365 case 7:
2366 /* 0x7000-0x7FFF: misc */
2367 if (tp_features.hotkey_wlsw && hkey == 0x7000) {
2368 tpacpi_input_send_radiosw();
2369 hotkey_radio_sw_notify_change();
2370 send_acpi_ev = 0;
2371 break;
2372 }
2373 /* fallthrough to default */
2374 default:
2375 unk_ev = 1;
2376 }
2377 if (unk_ev) {
2378 printk(TPACPI_NOTICE
2379 "unhandled HKEY event 0x%04x\n", hkey);
2380 }
2381
2382 /* Legacy events */
2383 if (!ignore_acpi_ev &&
2384 (send_acpi_ev || hotkey_report_mode < 2)) {
2385 acpi_bus_generate_proc_event(ibm->acpi->device,
2386 event, hkey);
2387 }
2388
2389 /* netlink events */
2390 if (!ignore_acpi_ev && send_acpi_ev) {
2391 acpi_bus_generate_netlink_event(
2392 ibm->acpi->device->pnp.device_class,
2393 ibm->acpi->device->dev.bus_id,
2394 event, hkey);
2395 }
2396 }
2397 }
2398
2399 static void hotkey_suspend(pm_message_t state)
2400 {
2401 /* Do these on suspend, we get the events on early resume! */
2402 hotkey_wakeup_reason = TP_ACPI_WAKEUP_NONE;
2403 hotkey_autosleep_ack = 0;
2404 }
2405
2406 static void hotkey_resume(void)
2407 {
2408 if (hotkey_mask_get())
2409 printk(TPACPI_ERR
2410 "error while trying to read hot key mask "
2411 "from firmware\n");
2412 tpacpi_input_send_radiosw();
2413 hotkey_radio_sw_notify_change();
2414 hotkey_tablet_mode_notify_change();
2415 hotkey_wakeup_reason_notify_change();
2416 hotkey_wakeup_hotunplug_complete_notify_change();
2417 hotkey_poll_setup_safe(0);
2418 }
2419
2420 /* procfs -------------------------------------------------------------- */
2421 static int hotkey_read(char *p)
2422 {
2423 int res, status;
2424 int len = 0;
2425
2426 if (!tp_features.hotkey) {
2427 len += sprintf(p + len, "status:\t\tnot supported\n");
2428 return len;
2429 }
2430
2431 if (mutex_lock_interruptible(&hotkey_mutex))
2432 return -ERESTARTSYS;
2433 res = hotkey_status_get(&status);
2434 if (!res)
2435 res = hotkey_mask_get();
2436 mutex_unlock(&hotkey_mutex);
2437 if (res)
2438 return res;
2439
2440 len += sprintf(p + len, "status:\t\t%s\n", enabled(status, 0));
2441 if (tp_features.hotkey_mask) {
2442 len += sprintf(p + len, "mask:\t\t0x%08x\n", hotkey_mask);
2443 len += sprintf(p + len,
2444 "commands:\tenable, disable, reset, <mask>\n");
2445 } else {
2446 len += sprintf(p + len, "mask:\t\tnot supported\n");
2447 len += sprintf(p + len, "commands:\tenable, disable, reset\n");
2448 }
2449
2450 return len;
2451 }
2452
2453 static int hotkey_write(char *buf)
2454 {
2455 int res, status;
2456 u32 mask;
2457 char *cmd;
2458
2459 if (!tp_features.hotkey)
2460 return -ENODEV;
2461
2462 if (mutex_lock_interruptible(&hotkey_mutex))
2463 return -ERESTARTSYS;
2464
2465 status = -1;
2466 mask = hotkey_mask;
2467
2468 res = 0;
2469 while ((cmd = next_cmd(&buf))) {
2470 if (strlencmp(cmd, "enable") == 0) {
2471 status = 1;
2472 } else if (strlencmp(cmd, "disable") == 0) {
2473 status = 0;
2474 } else if (strlencmp(cmd, "reset") == 0) {
2475 status = hotkey_orig_status;
2476 mask = hotkey_orig_mask;
2477 } else if (sscanf(cmd, "0x%x", &mask) == 1) {
2478 /* mask set */
2479 } else if (sscanf(cmd, "%x", &mask) == 1) {
2480 /* mask set */
2481 } else {
2482 res = -EINVAL;
2483 goto errexit;
2484 }
2485 }
2486 if (status != -1)
2487 res = hotkey_status_set(status);
2488
2489 if (!res && mask != hotkey_mask)
2490 res = hotkey_mask_set(mask);
2491
2492 errexit:
2493 mutex_unlock(&hotkey_mutex);
2494 return res;
2495 }
2496
2497 static const struct acpi_device_id ibm_htk_device_ids[] = {
2498 {TPACPI_ACPI_HKEY_HID, 0},
2499 {"", 0},
2500 };
2501
2502 static struct tp_acpi_drv_struct ibm_hotkey_acpidriver = {
2503 .hid = ibm_htk_device_ids,
2504 .notify = hotkey_notify,
2505 .handle = &hkey_handle,
2506 .type = ACPI_DEVICE_NOTIFY,
2507 };
2508
2509 static struct ibm_struct hotkey_driver_data = {
2510 .name = "hotkey",
2511 .read = hotkey_read,
2512 .write = hotkey_write,
2513 .exit = hotkey_exit,
2514 .resume = hotkey_resume,
2515 .suspend = hotkey_suspend,
2516 .acpi = &ibm_hotkey_acpidriver,
2517 };
2518
2519 /*************************************************************************
2520 * Bluetooth subdriver
2521 */
2522
2523 enum {
2524 /* ACPI GBDC/SBDC bits */
2525 TP_ACPI_BLUETOOTH_HWPRESENT = 0x01, /* Bluetooth hw available */
2526 TP_ACPI_BLUETOOTH_RADIOSSW = 0x02, /* Bluetooth radio enabled */
2527 TP_ACPI_BLUETOOTH_UNK = 0x04, /* unknown function */
2528 };
2529
2530 static int bluetooth_get_radiosw(void);
2531 static int bluetooth_set_radiosw(int radio_on);
2532
2533 /* sysfs bluetooth enable ---------------------------------------------- */
2534 static ssize_t bluetooth_enable_show(struct device *dev,
2535 struct device_attribute *attr,
2536 char *buf)
2537 {
2538 int status;
2539
2540 status = bluetooth_get_radiosw();
2541 if (status < 0)
2542 return status;
2543
2544 return snprintf(buf, PAGE_SIZE, "%d\n", status ? 1 : 0);
2545 }
2546
2547 static ssize_t bluetooth_enable_store(struct device *dev,
2548 struct device_attribute *attr,
2549 const char *buf, size_t count)
2550 {
2551 unsigned long t;
2552 int res;
2553
2554 if (parse_strtoul(buf, 1, &t))
2555 return -EINVAL;
2556
2557 res = bluetooth_set_radiosw(t);
2558
2559 return (res) ? res : count;
2560 }
2561
2562 static struct device_attribute dev_attr_bluetooth_enable =
2563 __ATTR(bluetooth_enable, S_IWUSR | S_IRUGO,
2564 bluetooth_enable_show, bluetooth_enable_store);
2565
2566 /* --------------------------------------------------------------------- */
2567
2568 static struct attribute *bluetooth_attributes[] = {
2569 &dev_attr_bluetooth_enable.attr,
2570 NULL
2571 };
2572
2573 static const struct attribute_group bluetooth_attr_group = {
2574 .attrs = bluetooth_attributes,
2575 };
2576
2577 static int __init bluetooth_init(struct ibm_init_struct *iibm)
2578 {
2579 int res;
2580 int status = 0;
2581
2582 vdbg_printk(TPACPI_DBG_INIT, "initializing bluetooth subdriver\n");
2583
2584 TPACPI_ACPIHANDLE_INIT(hkey);
2585
2586 /* bluetooth not supported on 570, 600e/x, 770e, 770x, A21e, A2xm/p,
2587 G4x, R30, R31, R40e, R50e, T20-22, X20-21 */
2588 tp_features.bluetooth = hkey_handle &&
2589 acpi_evalf(hkey_handle, &status, "GBDC", "qd");
2590
2591 vdbg_printk(TPACPI_DBG_INIT, "bluetooth is %s, status 0x%02x\n",
2592 str_supported(tp_features.bluetooth),
2593 status);
2594
2595 if (tp_features.bluetooth) {
2596 if (!(status & TP_ACPI_BLUETOOTH_HWPRESENT)) {
2597 /* no bluetooth hardware present in system */
2598 tp_features.bluetooth = 0;
2599 dbg_printk(TPACPI_DBG_INIT,
2600 "bluetooth hardware not installed\n");
2601 } else {
2602 res = sysfs_create_group(&tpacpi_pdev->dev.kobj,
2603 &bluetooth_attr_group);
2604 if (res)
2605 return res;
2606 }
2607 }
2608
2609 return (tp_features.bluetooth)? 0 : 1;
2610 }
2611
2612 static void bluetooth_exit(void)
2613 {
2614 sysfs_remove_group(&tpacpi_pdev->dev.kobj,
2615 &bluetooth_attr_group);
2616 }
2617
2618 static int bluetooth_get_radiosw(void)
2619 {
2620 int status;
2621
2622 if (!tp_features.bluetooth)
2623 return -ENODEV;
2624
2625 if (!acpi_evalf(hkey_handle, &status, "GBDC", "d"))
2626 return -EIO;
2627
2628 return ((status & TP_ACPI_BLUETOOTH_RADIOSSW) != 0);
2629 }
2630
2631 static int bluetooth_set_radiosw(int radio_on)
2632 {
2633 int status;
2634
2635 if (!tp_features.bluetooth)
2636 return -ENODEV;
2637
2638 if (!acpi_evalf(hkey_handle, &status, "GBDC", "d"))
2639 return -EIO;
2640 if (radio_on)
2641 status |= TP_ACPI_BLUETOOTH_RADIOSSW;
2642 else
2643 status &= ~TP_ACPI_BLUETOOTH_RADIOSSW;
2644 if (!acpi_evalf(hkey_handle, NULL, "SBDC", "vd", status))
2645 return -EIO;
2646
2647 return 0;
2648 }
2649
2650 /* procfs -------------------------------------------------------------- */
2651 static int bluetooth_read(char *p)
2652 {
2653 int len = 0;
2654 int status = bluetooth_get_radiosw();
2655
2656 if (!tp_features.bluetooth)
2657 len += sprintf(p + len, "status:\t\tnot supported\n");
2658 else {
2659 len += sprintf(p + len, "status:\t\t%s\n",
2660 (status)? "enabled" : "disabled");
2661 len += sprintf(p + len, "commands:\tenable, disable\n");
2662 }
2663
2664 return len;
2665 }
2666
2667 static int bluetooth_write(char *buf)
2668 {
2669 char *cmd;
2670
2671 if (!tp_features.bluetooth)
2672 return -ENODEV;
2673
2674 while ((cmd = next_cmd(&buf))) {
2675 if (strlencmp(cmd, "enable") == 0) {
2676 bluetooth_set_radiosw(1);
2677 } else if (strlencmp(cmd, "disable") == 0) {
2678 bluetooth_set_radiosw(0);
2679 } else
2680 return -EINVAL;
2681 }
2682
2683 return 0;
2684 }
2685
2686 static struct ibm_struct bluetooth_driver_data = {
2687 .name = "bluetooth",
2688 .read = bluetooth_read,
2689 .write = bluetooth_write,
2690 .exit = bluetooth_exit,
2691 };
2692
2693 /*************************************************************************
2694 * Wan subdriver
2695 */
2696
2697 enum {
2698 /* ACPI GWAN/SWAN bits */
2699 TP_ACPI_WANCARD_HWPRESENT = 0x01, /* Wan hw available */
2700 TP_ACPI_WANCARD_RADIOSSW = 0x02, /* Wan radio enabled */
2701 TP_ACPI_WANCARD_UNK = 0x04, /* unknown function */
2702 };
2703
2704 static int wan_get_radiosw(void);
2705 static int wan_set_radiosw(int radio_on);
2706
2707 /* sysfs wan enable ---------------------------------------------------- */
2708 static ssize_t wan_enable_show(struct device *dev,
2709 struct device_attribute *attr,
2710 char *buf)
2711 {
2712 int status;
2713
2714 status = wan_get_radiosw();
2715 if (status < 0)
2716 return status;
2717
2718 return snprintf(buf, PAGE_SIZE, "%d\n", status ? 1 : 0);
2719 }
2720
2721 static ssize_t wan_enable_store(struct device *dev,
2722 struct device_attribute *attr,
2723 const char *buf, size_t count)
2724 {
2725 unsigned long t;
2726 int res;
2727
2728 if (parse_strtoul(buf, 1, &t))
2729 return -EINVAL;
2730
2731 res = wan_set_radiosw(t);
2732
2733 return (res) ? res : count;
2734 }
2735
2736 static struct device_attribute dev_attr_wan_enable =
2737 __ATTR(wwan_enable, S_IWUSR | S_IRUGO,
2738 wan_enable_show, wan_enable_store);
2739
2740 /* --------------------------------------------------------------------- */
2741
2742 static struct attribute *wan_attributes[] = {
2743 &dev_attr_wan_enable.attr,
2744 NULL
2745 };
2746
2747 static const struct attribute_group wan_attr_group = {
2748 .attrs = wan_attributes,
2749 };
2750
2751 static int __init wan_init(struct ibm_init_struct *iibm)
2752 {
2753 int res;
2754 int status = 0;
2755
2756 vdbg_printk(TPACPI_DBG_INIT, "initializing wan subdriver\n");
2757
2758 TPACPI_ACPIHANDLE_INIT(hkey);
2759
2760 tp_features.wan = hkey_handle &&
2761 acpi_evalf(hkey_handle, &status, "GWAN", "qd");
2762
2763 vdbg_printk(TPACPI_DBG_INIT, "wan is %s, status 0x%02x\n",
2764 str_supported(tp_features.wan),
2765 status);
2766
2767 if (tp_features.wan) {
2768 if (!(status & TP_ACPI_WANCARD_HWPRESENT)) {
2769 /* no wan hardware present in system */
2770 tp_features.wan = 0;
2771 dbg_printk(TPACPI_DBG_INIT,
2772 "wan hardware not installed\n");
2773 } else {
2774 res = sysfs_create_group(&tpacpi_pdev->dev.kobj,
2775 &wan_attr_group);
2776 if (res)
2777 return res;
2778 }
2779 }
2780
2781 return (tp_features.wan)? 0 : 1;
2782 }
2783
2784 static void wan_exit(void)
2785 {
2786 sysfs_remove_group(&tpacpi_pdev->dev.kobj,
2787 &wan_attr_group);
2788 }
2789
2790 static int wan_get_radiosw(void)
2791 {
2792 int status;
2793
2794 if (!tp_features.wan)
2795 return -ENODEV;
2796
2797 if (!acpi_evalf(hkey_handle, &status, "GWAN", "d"))
2798 return -EIO;
2799
2800 return ((status & TP_ACPI_WANCARD_RADIOSSW) != 0);
2801 }
2802
2803 static int wan_set_radiosw(int radio_on)
2804 {
2805 int status;
2806
2807 if (!tp_features.wan)
2808 return -ENODEV;
2809
2810 if (!acpi_evalf(hkey_handle, &status, "GWAN", "d"))
2811 return -EIO;
2812 if (radio_on)
2813 status |= TP_ACPI_WANCARD_RADIOSSW;
2814 else
2815 status &= ~TP_ACPI_WANCARD_RADIOSSW;
2816 if (!acpi_evalf(hkey_handle, NULL, "SWAN", "vd", status))
2817 return -EIO;
2818
2819 return 0;
2820 }
2821
2822 /* procfs -------------------------------------------------------------- */
2823 static int wan_read(char *p)
2824 {
2825 int len = 0;
2826 int status = wan_get_radiosw();
2827
2828 if (!tp_features.wan)
2829 len += sprintf(p + len, "status:\t\tnot supported\n");
2830 else {
2831 len += sprintf(p + len, "status:\t\t%s\n",
2832 (status)? "enabled" : "disabled");
2833 len += sprintf(p + len, "commands:\tenable, disable\n");
2834 }
2835
2836 return len;
2837 }
2838
2839 static int wan_write(char *buf)
2840 {
2841 char *cmd;
2842
2843 if (!tp_features.wan)
2844 return -ENODEV;
2845
2846 while ((cmd = next_cmd(&buf))) {
2847 if (strlencmp(cmd, "enable") == 0) {
2848 wan_set_radiosw(1);
2849 } else if (strlencmp(cmd, "disable") == 0) {
2850 wan_set_radiosw(0);
2851 } else
2852 return -EINVAL;
2853 }
2854
2855 return 0;
2856 }
2857
2858 static struct ibm_struct wan_driver_data = {
2859 .name = "wan",
2860 .read = wan_read,
2861 .write = wan_write,
2862 .exit = wan_exit,
2863 .flags.experimental = 1,
2864 };
2865
2866 /*************************************************************************
2867 * Video subdriver
2868 */
2869
2870 #ifdef CONFIG_THINKPAD_ACPI_VIDEO
2871
2872 enum video_access_mode {
2873 TPACPI_VIDEO_NONE = 0,
2874 TPACPI_VIDEO_570, /* 570 */
2875 TPACPI_VIDEO_770, /* 600e/x, 770e, 770x */
2876 TPACPI_VIDEO_NEW, /* all others */
2877 };
2878
2879 enum { /* video status flags, based on VIDEO_570 */
2880 TP_ACPI_VIDEO_S_LCD = 0x01, /* LCD output enabled */
2881 TP_ACPI_VIDEO_S_CRT = 0x02, /* CRT output enabled */
2882 TP_ACPI_VIDEO_S_DVI = 0x08, /* DVI output enabled */
2883 };
2884
2885 enum { /* TPACPI_VIDEO_570 constants */
2886 TP_ACPI_VIDEO_570_PHSCMD = 0x87, /* unknown magic constant :( */
2887 TP_ACPI_VIDEO_570_PHSMASK = 0x03, /* PHS bits that map to
2888 * video_status_flags */
2889 TP_ACPI_VIDEO_570_PHS2CMD = 0x8b, /* unknown magic constant :( */
2890 TP_ACPI_VIDEO_570_PHS2SET = 0x80, /* unknown magic constant :( */
2891 };
2892
2893 static enum video_access_mode video_supported;
2894 static int video_orig_autosw;
2895
2896 static int video_autosw_get(void);
2897 static int video_autosw_set(int enable);
2898
2899 TPACPI_HANDLE(vid2, root, "\\_SB.PCI0.AGPB.VID"); /* G41 */
2900
2901 static int __init video_init(struct ibm_init_struct *iibm)
2902 {
2903 int ivga;
2904
2905 vdbg_printk(TPACPI_DBG_INIT, "initializing video subdriver\n");
2906
2907 TPACPI_ACPIHANDLE_INIT(vid);
2908 TPACPI_ACPIHANDLE_INIT(vid2);
2909
2910 if (vid2_handle && acpi_evalf(NULL, &ivga, "\\IVGA", "d") && ivga)
2911 /* G41, assume IVGA doesn't change */
2912 vid_handle = vid2_handle;
2913
2914 if (!vid_handle)
2915 /* video switching not supported on R30, R31 */
2916 video_supported = TPACPI_VIDEO_NONE;
2917 else if (acpi_evalf(vid_handle, &video_orig_autosw, "SWIT", "qd"))
2918 /* 570 */
2919 video_supported = TPACPI_VIDEO_570;
2920 else if (acpi_evalf(vid_handle, &video_orig_autosw, "^VADL", "qd"))
2921 /* 600e/x, 770e, 770x */
2922 video_supported = TPACPI_VIDEO_770;
2923 else
2924 /* all others */
2925 video_supported = TPACPI_VIDEO_NEW;
2926
2927 vdbg_printk(TPACPI_DBG_INIT, "video is %s, mode %d\n",
2928 str_supported(video_supported != TPACPI_VIDEO_NONE),
2929 video_supported);
2930
2931 return (video_supported != TPACPI_VIDEO_NONE)? 0 : 1;
2932 }
2933
2934 static void video_exit(void)
2935 {
2936 dbg_printk(TPACPI_DBG_EXIT,
2937 "restoring original video autoswitch mode\n");
2938 if (video_autosw_set(video_orig_autosw))
2939 printk(TPACPI_ERR "error while trying to restore original "
2940 "video autoswitch mode\n");
2941 }
2942
2943 static int video_outputsw_get(void)
2944 {
2945 int status = 0;
2946 int i;
2947
2948 switch (video_supported) {
2949 case TPACPI_VIDEO_570:
2950 if (!acpi_evalf(NULL, &i, "\\_SB.PHS", "dd",
2951 TP_ACPI_VIDEO_570_PHSCMD))
2952 return -EIO;
2953 status = i & TP_ACPI_VIDEO_570_PHSMASK;
2954 break;
2955 case TPACPI_VIDEO_770:
2956 if (!acpi_evalf(NULL, &i, "\\VCDL", "d"))
2957 return -EIO;
2958 if (i)
2959 status |= TP_ACPI_VIDEO_S_LCD;
2960 if (!acpi_evalf(NULL, &i, "\\VCDC", "d"))
2961 return -EIO;
2962 if (i)
2963 status |= TP_ACPI_VIDEO_S_CRT;
2964 break;
2965 case TPACPI_VIDEO_NEW:
2966 if (!acpi_evalf(NULL, NULL, "\\VUPS", "vd", 1) ||
2967 !acpi_evalf(NULL, &i, "\\VCDC", "d"))
2968 return -EIO;
2969 if (i)
2970 status |= TP_ACPI_VIDEO_S_CRT;
2971
2972 if (!acpi_evalf(NULL, NULL, "\\VUPS", "vd", 0) ||
2973 !acpi_evalf(NULL, &i, "\\VCDL", "d"))
2974 return -EIO;
2975 if (i)
2976 status |= TP_ACPI_VIDEO_S_LCD;
2977 if (!acpi_evalf(NULL, &i, "\\VCDD", "d"))
2978 return -EIO;
2979 if (i)
2980 status |= TP_ACPI_VIDEO_S_DVI;
2981 break;
2982 default:
2983 return -ENOSYS;
2984 }
2985
2986 return status;
2987 }
2988
2989 static int video_outputsw_set(int status)
2990 {
2991 int autosw;
2992 int res = 0;
2993
2994 switch (video_supported) {
2995 case TPACPI_VIDEO_570:
2996 res = acpi_evalf(NULL, NULL,
2997 "\\_SB.PHS2", "vdd",
2998 TP_ACPI_VIDEO_570_PHS2CMD,
2999 status | TP_ACPI_VIDEO_570_PHS2SET);
3000 break;
3001 case TPACPI_VIDEO_770:
3002 autosw = video_autosw_get();
3003 if (autosw < 0)
3004 return autosw;
3005
3006 res = video_autosw_set(1);
3007 if (res)
3008 return res;
3009 res = acpi_evalf(vid_handle, NULL,
3010 "ASWT", "vdd", status * 0x100, 0);
3011 if (!autosw && video_autosw_set(autosw)) {
3012 printk(TPACPI_ERR
3013 "video auto-switch left enabled due to error\n");
3014 return -EIO;
3015 }
3016 break;
3017 case TPACPI_VIDEO_NEW:
3018 res = acpi_evalf(NULL, NULL, "\\VUPS", "vd", 0x80) &&
3019 acpi_evalf(NULL, NULL, "\\VSDS", "vdd", status, 1);
3020 break;
3021 default:
3022 return -ENOSYS;
3023 }
3024
3025 return (res)? 0 : -EIO;
3026 }
3027
3028 static int video_autosw_get(void)
3029 {
3030 int autosw = 0;
3031
3032 switch (video_supported) {
3033 case TPACPI_VIDEO_570:
3034 if (!acpi_evalf(vid_handle, &autosw, "SWIT", "d"))
3035 return -EIO;
3036 break;
3037 case TPACPI_VIDEO_770:
3038 case TPACPI_VIDEO_NEW:
3039 if (!acpi_evalf(vid_handle, &autosw, "^VDEE", "d"))
3040 return -EIO;
3041 break;
3042 default:
3043 return -ENOSYS;
3044 }
3045
3046 return autosw & 1;
3047 }
3048
3049 static int video_autosw_set(int enable)
3050 {
3051 if (!acpi_evalf(vid_handle, NULL, "_DOS", "vd", (enable)? 1 : 0))
3052 return -EIO;
3053 return 0;
3054 }
3055
3056 static int video_outputsw_cycle(void)
3057 {
3058 int autosw = video_autosw_get();
3059 int res;
3060
3061 if (autosw < 0)
3062 return autosw;
3063
3064 switch (video_supported) {
3065 case TPACPI_VIDEO_570:
3066 res = video_autosw_set(1);
3067 if (res)
3068 return res;
3069 res = acpi_evalf(ec_handle, NULL, "_Q16", "v");
3070 break;
3071 case TPACPI_VIDEO_770:
3072 case TPACPI_VIDEO_NEW:
3073 res = video_autosw_set(1);
3074 if (res)
3075 return res;
3076 res = acpi_evalf(vid_handle, NULL, "VSWT", "v");
3077 break;
3078 default:
3079 return -ENOSYS;
3080 }
3081 if (!autosw && video_autosw_set(autosw)) {
3082 printk(TPACPI_ERR
3083 "video auto-switch left enabled due to error\n");
3084 return -EIO;
3085 }
3086
3087 return (res)? 0 : -EIO;
3088 }
3089
3090 static int video_expand_toggle(void)
3091 {
3092 switch (video_supported) {
3093 case TPACPI_VIDEO_570:
3094 return acpi_evalf(ec_handle, NULL, "_Q17", "v")?
3095 0 : -EIO;
3096 case TPACPI_VIDEO_770:
3097 return acpi_evalf(vid_handle, NULL, "VEXP", "v")?
3098 0 : -EIO;
3099 case TPACPI_VIDEO_NEW:
3100 return acpi_evalf(NULL, NULL, "\\VEXP", "v")?
3101 0 : -EIO;
3102 default:
3103 return -ENOSYS;
3104 }
3105 /* not reached */
3106 }
3107
3108 static int video_read(char *p)
3109 {
3110 int status, autosw;
3111 int len = 0;
3112
3113 if (video_supported == TPACPI_VIDEO_NONE) {
3114 len += sprintf(p + len, "status:\t\tnot supported\n");
3115 return len;
3116 }
3117
3118 status = video_outputsw_get();
3119 if (status < 0)
3120 return status;
3121
3122 autosw = video_autosw_get();
3123 if (autosw < 0)
3124 return autosw;
3125
3126 len += sprintf(p + len, "status:\t\tsupported\n");
3127 len += sprintf(p + len, "lcd:\t\t%s\n", enabled(status, 0));
3128 len += sprintf(p + len, "crt:\t\t%s\n", enabled(status, 1));
3129 if (video_supported == TPACPI_VIDEO_NEW)
3130 len += sprintf(p + len, "dvi:\t\t%s\n", enabled(status, 3));
3131 len += sprintf(p + len, "auto:\t\t%s\n", enabled(autosw, 0));
3132 len += sprintf(p + len, "commands:\tlcd_enable, lcd_disable\n");
3133 len += sprintf(p + len, "commands:\tcrt_enable, crt_disable\n");
3134 if (video_supported == TPACPI_VIDEO_NEW)
3135 len += sprintf(p + len, "commands:\tdvi_enable, dvi_disable\n");
3136 len += sprintf(p + len, "commands:\tauto_enable, auto_disable\n");
3137 len += sprintf(p + len, "commands:\tvideo_switch, expand_toggle\n");
3138
3139 return len;
3140 }
3141
3142 static int video_write(char *buf)
3143 {
3144 char *cmd;
3145 int enable, disable, status;
3146 int res;
3147
3148 if (video_supported == TPACPI_VIDEO_NONE)
3149 return -ENODEV;
3150
3151 enable = 0;
3152 disable = 0;
3153
3154 while ((cmd = next_cmd(&buf))) {
3155 if (strlencmp(cmd, "lcd_enable") == 0) {
3156 enable |= TP_ACPI_VIDEO_S_LCD;
3157 } else if (strlencmp(cmd, "lcd_disable") == 0) {
3158 disable |= TP_ACPI_VIDEO_S_LCD;
3159 } else if (strlencmp(cmd, "crt_enable") == 0) {
3160 enable |= TP_ACPI_VIDEO_S_CRT;
3161 } else if (strlencmp(cmd, "crt_disable") == 0) {
3162 disable |= TP_ACPI_VIDEO_S_CRT;
3163 } else if (video_supported == TPACPI_VIDEO_NEW &&
3164 strlencmp(cmd, "dvi_enable") == 0) {
3165 enable |= TP_ACPI_VIDEO_S_DVI;
3166 } else if (video_supported == TPACPI_VIDEO_NEW &&
3167 strlencmp(cmd, "dvi_disable") == 0) {
3168 disable |= TP_ACPI_VIDEO_S_DVI;
3169 } else if (strlencmp(cmd, "auto_enable") == 0) {
3170 res = video_autosw_set(1);
3171 if (res)
3172 return res;
3173 } else if (strlencmp(cmd, "auto_disable") == 0) {
3174 res = video_autosw_set(0);
3175 if (res)
3176 return res;
3177 } else if (strlencmp(cmd, "video_switch") == 0) {
3178 res = video_outputsw_cycle();
3179 if (res)
3180 return res;
3181 } else if (strlencmp(cmd, "expand_toggle") == 0) {
3182 res = video_expand_toggle();
3183 if (res)
3184 return res;
3185 } else
3186 return -EINVAL;
3187 }
3188
3189 if (enable || disable) {
3190 status = video_outputsw_get();
3191 if (status < 0)
3192 return status;
3193 res = video_outputsw_set((status & ~disable) | enable);
3194 if (res)
3195 return res;
3196 }
3197
3198 return 0;
3199 }
3200
3201 static struct ibm_struct video_driver_data = {
3202 .name = "video",
3203 .read = video_read,
3204 .write = video_write,
3205 .exit = video_exit,
3206 };
3207
3208 #endif /* CONFIG_THINKPAD_ACPI_VIDEO */
3209
3210 /*************************************************************************
3211 * Light (thinklight) subdriver
3212 */
3213
3214 TPACPI_HANDLE(lght, root, "\\LGHT"); /* A21e, A2xm/p, T20-22, X20-21 */
3215 TPACPI_HANDLE(ledb, ec, "LEDB"); /* G4x */
3216
3217 static int __init light_init(struct ibm_init_struct *iibm)
3218 {
3219 vdbg_printk(TPACPI_DBG_INIT, "initializing light subdriver\n");
3220
3221 TPACPI_ACPIHANDLE_INIT(ledb);
3222 TPACPI_ACPIHANDLE_INIT(lght);
3223 TPACPI_ACPIHANDLE_INIT(cmos);
3224
3225 /* light not supported on 570, 600e/x, 770e, 770x, G4x, R30, R31 */
3226 tp_features.light = (cmos_handle || lght_handle) && !ledb_handle;
3227
3228 if (tp_features.light)
3229 /* light status not supported on
3230 570, 600e/x, 770e, 770x, G4x, R30, R31, R32, X20 */
3231 tp_features.light_status =
3232 acpi_evalf(ec_handle, NULL, "KBLT", "qv");
3233
3234 vdbg_printk(TPACPI_DBG_INIT, "light is %s\n",
3235 str_supported(tp_features.light));
3236
3237 return (tp_features.light)? 0 : 1;
3238 }
3239
3240 static int light_read(char *p)
3241 {
3242 int len = 0;
3243 int status = 0;
3244
3245 if (!tp_features.light) {
3246 len += sprintf(p + len, "status:\t\tnot supported\n");
3247 } else if (!tp_features.light_status) {
3248 len += sprintf(p + len, "status:\t\tunknown\n");
3249 len += sprintf(p + len, "commands:\ton, off\n");
3250 } else {
3251 if (!acpi_evalf(ec_handle, &status, "KBLT", "d"))
3252 return -EIO;
3253 len += sprintf(p + len, "status:\t\t%s\n", onoff(status, 0));
3254 len += sprintf(p + len, "commands:\ton, off\n");
3255 }
3256
3257 return len;
3258 }
3259
3260 static int light_write(char *buf)
3261 {
3262 int cmos_cmd, lght_cmd;
3263 char *cmd;
3264 int success;
3265
3266 if (!tp_features.light)
3267 return -ENODEV;
3268
3269 while ((cmd = next_cmd(&buf))) {
3270 if (strlencmp(cmd, "on") == 0) {
3271 cmos_cmd = 0x0c;
3272 lght_cmd = 1;
3273 } else if (strlencmp(cmd, "off") == 0) {
3274 cmos_cmd = 0x0d;
3275 lght_cmd = 0;
3276 } else
3277 return -EINVAL;
3278
3279 success = cmos_handle ?
3280 acpi_evalf(cmos_handle, NULL, NULL, "vd", cmos_cmd) :
3281 acpi_evalf(lght_handle, NULL, NULL, "vd", lght_cmd);
3282 if (!success)
3283 return -EIO;
3284 }
3285
3286 return 0;
3287 }
3288
3289 static struct ibm_struct light_driver_data = {
3290 .name = "light",
3291 .read = light_read,
3292 .write = light_write,
3293 };
3294
3295 /*************************************************************************
3296 * Dock subdriver
3297 */
3298
3299 #ifdef CONFIG_THINKPAD_ACPI_DOCK
3300
3301 static void dock_notify(struct ibm_struct *ibm, u32 event);
3302 static int dock_read(char *p);
3303 static int dock_write(char *buf);
3304
3305 TPACPI_HANDLE(dock, root, "\\_SB.GDCK", /* X30, X31, X40 */
3306 "\\_SB.PCI0.DOCK", /* 600e/x,770e,770x,A2xm/p,T20-22,X20-21 */
3307 "\\_SB.PCI0.PCI1.DOCK", /* all others */
3308 "\\_SB.PCI.ISA.SLCE", /* 570 */
3309 ); /* A21e,G4x,R30,R31,R32,R40,R40e,R50e */
3310
3311 /* don't list other alternatives as we install a notify handler on the 570 */
3312 TPACPI_HANDLE(pci, root, "\\_SB.PCI"); /* 570 */
3313
3314 static const struct acpi_device_id ibm_pci_device_ids[] = {
3315 {PCI_ROOT_HID_STRING, 0},
3316 {"", 0},
3317 };
3318
3319 static struct tp_acpi_drv_struct ibm_dock_acpidriver[2] = {
3320 {
3321 .notify = dock_notify,
3322 .handle = &dock_handle,
3323 .type = ACPI_SYSTEM_NOTIFY,
3324 },
3325 {
3326 /* THIS ONE MUST NEVER BE USED FOR DRIVER AUTOLOADING.
3327 * We just use it to get notifications of dock hotplug
3328 * in very old thinkpads */
3329 .hid = ibm_pci_device_ids,
3330 .notify = dock_notify,
3331 .handle = &pci_handle,
3332 .type = ACPI_SYSTEM_NOTIFY,
3333 },
3334 };
3335
3336 static struct ibm_struct dock_driver_data[2] = {
3337 {
3338 .name = "dock",
3339 .read = dock_read,
3340 .write = dock_write,
3341 .acpi = &ibm_dock_acpidriver[0],
3342 },
3343 {
3344 .name = "dock",
3345 .acpi = &ibm_dock_acpidriver[1],
3346 },
3347 };
3348
3349 #define dock_docked() (_sta(dock_handle) & 1)
3350
3351 static int __init dock_init(struct ibm_init_struct *iibm)
3352 {
3353 vdbg_printk(TPACPI_DBG_INIT, "initializing dock subdriver\n");
3354
3355 TPACPI_ACPIHANDLE_INIT(dock);
3356
3357 vdbg_printk(TPACPI_DBG_INIT, "dock is %s\n",
3358 str_supported(dock_handle != NULL));
3359
3360 return (dock_handle)? 0 : 1;
3361 }
3362
3363 static int __init dock_init2(struct ibm_init_struct *iibm)
3364 {
3365 int dock2_needed;
3366
3367 vdbg_printk(TPACPI_DBG_INIT, "initializing dock subdriver part 2\n");
3368
3369 if (dock_driver_data[0].flags.acpi_driver_registered &&
3370 dock_driver_data[0].flags.acpi_notify_installed) {
3371 TPACPI_ACPIHANDLE_INIT(pci);
3372 dock2_needed = (pci_handle != NULL);
3373 vdbg_printk(TPACPI_DBG_INIT,
3374 "dock PCI handler for the TP 570 is %s\n",
3375 str_supported(dock2_needed));
3376 } else {
3377 vdbg_printk(TPACPI_DBG_INIT,
3378 "dock subdriver part 2 not required\n");
3379 dock2_needed = 0;
3380 }
3381
3382 return (dock2_needed)? 0 : 1;
3383 }
3384
3385 static void dock_notify(struct ibm_struct *ibm, u32 event)
3386 {
3387 int docked = dock_docked();
3388 int pci = ibm->acpi->hid && ibm->acpi->device &&
3389 acpi_match_device_ids(ibm->acpi->device, ibm_pci_device_ids);
3390 int data;
3391
3392 if (event == 1 && !pci) /* 570 */
3393 data = 1; /* button */
3394 else if (event == 1 && pci) /* 570 */
3395 data = 3; /* dock */
3396 else if (event == 3 && docked)
3397 data = 1; /* button */
3398 else if (event == 3 && !docked)
3399 data = 2; /* undock */
3400 else if (event == 0 && docked)
3401 data = 3; /* dock */
3402 else {
3403 printk(TPACPI_ERR "unknown dock event %d, status %d\n",
3404 event, _sta(dock_handle));
3405 data = 0; /* unknown */
3406 }
3407 acpi_bus_generate_proc_event(ibm->acpi->device, event, data);
3408 acpi_bus_generate_netlink_event(ibm->acpi->device->pnp.device_class,
3409 ibm->acpi->device->dev.bus_id,
3410 event, data);
3411 }
3412
3413 static int dock_read(char *p)
3414 {
3415 int len = 0;
3416 int docked = dock_docked();
3417
3418 if (!dock_handle)
3419 len += sprintf(p + len, "status:\t\tnot supported\n");
3420 else if (!docked)
3421 len += sprintf(p + len, "status:\t\tundocked\n");
3422 else {
3423 len += sprintf(p + len, "status:\t\tdocked\n");
3424 len += sprintf(p + len, "commands:\tdock, undock\n");
3425 }
3426
3427 return len;
3428 }
3429
3430 static int dock_write(char *buf)
3431 {
3432 char *cmd;
3433
3434 if (!dock_docked())
3435 return -ENODEV;
3436
3437 while ((cmd = next_cmd(&buf))) {
3438 if (strlencmp(cmd, "undock") == 0) {
3439 if (!acpi_evalf(dock_handle, NULL, "_DCK", "vd", 0) ||
3440 !acpi_evalf(dock_handle, NULL, "_EJ0", "vd", 1))
3441 return -EIO;
3442 } else if (strlencmp(cmd, "dock") == 0) {
3443 if (!acpi_evalf(dock_handle, NULL, "_DCK", "vd", 1))
3444 return -EIO;
3445 } else
3446 return -EINVAL;
3447 }
3448
3449 return 0;
3450 }
3451
3452 #endif /* CONFIG_THINKPAD_ACPI_DOCK */
3453
3454 /*************************************************************************
3455 * Bay subdriver
3456 */
3457
3458 #ifdef CONFIG_THINKPAD_ACPI_BAY
3459
3460 TPACPI_HANDLE(bay, root, "\\_SB.PCI.IDE.SECN.MAST", /* 570 */
3461 "\\_SB.PCI0.IDE0.IDES.IDSM", /* 600e/x, 770e, 770x */
3462 "\\_SB.PCI0.SATA.SCND.MSTR", /* T60, X60, Z60 */
3463 "\\_SB.PCI0.IDE0.SCND.MSTR", /* all others */
3464 ); /* A21e, R30, R31 */
3465 TPACPI_HANDLE(bay_ej, bay, "_EJ3", /* 600e/x, A2xm/p, A3x */
3466 "_EJ0", /* all others */
3467 ); /* 570,A21e,G4x,R30,R31,R32,R40e,R50e */
3468 TPACPI_HANDLE(bay2, root, "\\_SB.PCI0.IDE0.PRIM.SLAV", /* A3x, R32 */
3469 "\\_SB.PCI0.IDE0.IDEP.IDPS", /* 600e/x, 770e, 770x */
3470 ); /* all others */
3471 TPACPI_HANDLE(bay2_ej, bay2, "_EJ3", /* 600e/x, 770e, A3x */
3472 "_EJ0", /* 770x */
3473 ); /* all others */
3474
3475 static int __init bay_init(struct ibm_init_struct *iibm)
3476 {
3477 vdbg_printk(TPACPI_DBG_INIT, "initializing bay subdriver\n");
3478
3479 TPACPI_ACPIHANDLE_INIT(bay);
3480 if (bay_handle)
3481 TPACPI_ACPIHANDLE_INIT(bay_ej);
3482 TPACPI_ACPIHANDLE_INIT(bay2);
3483 if (bay2_handle)
3484 TPACPI_ACPIHANDLE_INIT(bay2_ej);
3485
3486 tp_features.bay_status = bay_handle &&
3487 acpi_evalf(bay_handle, NULL, "_STA", "qv");
3488 tp_features.bay_status2 = bay2_handle &&
3489 acpi_evalf(bay2_handle, NULL, "_STA", "qv");
3490
3491 tp_features.bay_eject = bay_handle && bay_ej_handle &&
3492 (strlencmp(bay_ej_path, "_EJ0") == 0 || experimental);
3493 tp_features.bay_eject2 = bay2_handle && bay2_ej_handle &&
3494 (strlencmp(bay2_ej_path, "_EJ0") == 0 || experimental);
3495
3496 vdbg_printk(TPACPI_DBG_INIT,
3497 "bay 1: status %s, eject %s; bay 2: status %s, eject %s\n",
3498 str_supported(tp_features.bay_status),
3499 str_supported(tp_features.bay_eject),
3500 str_supported(tp_features.bay_status2),
3501 str_supported(tp_features.bay_eject2));
3502
3503 return (tp_features.bay_status || tp_features.bay_eject ||
3504 tp_features.bay_status2 || tp_features.bay_eject2)? 0 : 1;
3505 }
3506
3507 static void bay_notify(struct ibm_struct *ibm, u32 event)
3508 {
3509 acpi_bus_generate_proc_event(ibm->acpi->device, event, 0);
3510 acpi_bus_generate_netlink_event(ibm->acpi->device->pnp.device_class,
3511 ibm->acpi->device->dev.bus_id,
3512 event, 0);
3513 }
3514
3515 #define bay_occupied(b) (_sta(b##_handle) & 1)
3516
3517 static int bay_read(char *p)
3518 {
3519 int len = 0;
3520 int occupied = bay_occupied(bay);
3521 int occupied2 = bay_occupied(bay2);
3522 int eject, eject2;
3523
3524 len += sprintf(p + len, "status:\t\t%s\n",
3525 tp_features.bay_status ?
3526 (occupied ? "occupied" : "unoccupied") :
3527 "not supported");
3528 if (tp_features.bay_status2)
3529 len += sprintf(p + len, "status2:\t%s\n", occupied2 ?
3530 "occupied" : "unoccupied");
3531
3532 eject = tp_features.bay_eject && occupied;
3533 eject2 = tp_features.bay_eject2 && occupied2;
3534
3535 if (eject && eject2)
3536 len += sprintf(p + len, "commands:\teject, eject2\n");
3537 else if (eject)
3538 len += sprintf(p + len, "commands:\teject\n");
3539 else if (eject2)
3540 len += sprintf(p + len, "commands:\teject2\n");
3541
3542 return len;
3543 }
3544
3545 static int bay_write(char *buf)
3546 {
3547 char *cmd;
3548
3549 if (!tp_features.bay_eject && !tp_features.bay_eject2)
3550 return -ENODEV;
3551
3552 while ((cmd = next_cmd(&buf))) {
3553 if (tp_features.bay_eject && strlencmp(cmd, "eject") == 0) {
3554 if (!acpi_evalf(bay_ej_handle, NULL, NULL, "vd", 1))
3555 return -EIO;
3556 } else if (tp_features.bay_eject2 &&
3557 strlencmp(cmd, "eject2") == 0) {
3558 if (!acpi_evalf(bay2_ej_handle, NULL, NULL, "vd", 1))
3559 return -EIO;
3560 } else
3561 return -EINVAL;
3562 }
3563
3564 return 0;
3565 }
3566
3567 static struct tp_acpi_drv_struct ibm_bay_acpidriver = {
3568 .notify = bay_notify,
3569 .handle = &bay_handle,
3570 .type = ACPI_SYSTEM_NOTIFY,
3571 };
3572
3573 static struct ibm_struct bay_driver_data = {
3574 .name = "bay",
3575 .read = bay_read,
3576 .write = bay_write,
3577 .acpi = &ibm_bay_acpidriver,
3578 };
3579
3580 #endif /* CONFIG_THINKPAD_ACPI_BAY */
3581
3582 /*************************************************************************
3583 * CMOS subdriver
3584 */
3585
3586 /* sysfs cmos_command -------------------------------------------------- */
3587 static ssize_t cmos_command_store(struct device *dev,
3588 struct device_attribute *attr,
3589 const char *buf, size_t count)
3590 {
3591 unsigned long cmos_cmd;
3592 int res;
3593
3594 if (parse_strtoul(buf, 21, &cmos_cmd))
3595 return -EINVAL;
3596
3597 res = issue_thinkpad_cmos_command(cmos_cmd);
3598 return (res)? res : count;
3599 }
3600
3601 static struct device_attribute dev_attr_cmos_command =
3602 __ATTR(cmos_command, S_IWUSR, NULL, cmos_command_store);
3603
3604 /* --------------------------------------------------------------------- */
3605
3606 static int __init cmos_init(struct ibm_init_struct *iibm)
3607 {
3608 int res;
3609
3610 vdbg_printk(TPACPI_DBG_INIT,
3611 "initializing cmos commands subdriver\n");
3612
3613 TPACPI_ACPIHANDLE_INIT(cmos);
3614
3615 vdbg_printk(TPACPI_DBG_INIT, "cmos commands are %s\n",
3616 str_supported(cmos_handle != NULL));
3617
3618 res = device_create_file(&tpacpi_pdev->dev, &dev_attr_cmos_command);
3619 if (res)
3620 return res;
3621
3622 return (cmos_handle)? 0 : 1;
3623 }
3624
3625 static void cmos_exit(void)
3626 {
3627 device_remove_file(&tpacpi_pdev->dev, &dev_attr_cmos_command);
3628 }
3629
3630 static int cmos_read(char *p)
3631 {
3632 int len = 0;
3633
3634 /* cmos not supported on 570, 600e/x, 770e, 770x, A21e, A2xm/p,
3635 R30, R31, T20-22, X20-21 */
3636 if (!cmos_handle)
3637 len += sprintf(p + len, "status:\t\tnot supported\n");
3638 else {
3639 len += sprintf(p + len, "status:\t\tsupported\n");
3640 len += sprintf(p + len, "commands:\t<cmd> (<cmd> is 0-21)\n");
3641 }
3642
3643 return len;
3644 }
3645
3646 static int cmos_write(char *buf)
3647 {
3648 char *cmd;
3649 int cmos_cmd, res;
3650
3651 while ((cmd = next_cmd(&buf))) {
3652 if (sscanf(cmd, "%u", &cmos_cmd) == 1 &&
3653 cmos_cmd >= 0 && cmos_cmd <= 21) {
3654 /* cmos_cmd set */
3655 } else
3656 return -EINVAL;
3657
3658 res = issue_thinkpad_cmos_command(cmos_cmd);
3659 if (res)
3660 return res;
3661 }
3662
3663 return 0;
3664 }
3665
3666 static struct ibm_struct cmos_driver_data = {
3667 .name = "cmos",
3668 .read = cmos_read,
3669 .write = cmos_write,
3670 .exit = cmos_exit,
3671 };
3672
3673 /*************************************************************************
3674 * LED subdriver
3675 */
3676
3677 enum led_access_mode {
3678 TPACPI_LED_NONE = 0,
3679 TPACPI_LED_570, /* 570 */
3680 TPACPI_LED_OLD, /* 600e/x, 770e, 770x, A21e, A2xm/p, T20-22, X20-21 */
3681 TPACPI_LED_NEW, /* all others */
3682 };
3683
3684 enum { /* For TPACPI_LED_OLD */
3685 TPACPI_LED_EC_HLCL = 0x0c, /* EC reg to get led to power on */
3686 TPACPI_LED_EC_HLBL = 0x0d, /* EC reg to blink a lit led */
3687 TPACPI_LED_EC_HLMS = 0x0e, /* EC reg to select led to command */
3688 };
3689
3690 static enum led_access_mode led_supported;
3691
3692 TPACPI_HANDLE(led, ec, "SLED", /* 570 */
3693 "SYSL", /* 600e/x, 770e, 770x, A21e, A2xm/p, */
3694 /* T20-22, X20-21 */
3695 "LED", /* all others */
3696 ); /* R30, R31 */
3697
3698 static int __init led_init(struct ibm_init_struct *iibm)
3699 {
3700 vdbg_printk(TPACPI_DBG_INIT, "initializing LED subdriver\n");
3701
3702 TPACPI_ACPIHANDLE_INIT(led);
3703
3704 if (!led_handle)
3705 /* led not supported on R30, R31 */
3706 led_supported = TPACPI_LED_NONE;
3707 else if (strlencmp(led_path, "SLED") == 0)
3708 /* 570 */
3709 led_supported = TPACPI_LED_570;
3710 else if (strlencmp(led_path, "SYSL") == 0)
3711 /* 600e/x, 770e, 770x, A21e, A2xm/p, T20-22, X20-21 */
3712 led_supported = TPACPI_LED_OLD;
3713 else
3714 /* all others */
3715 led_supported = TPACPI_LED_NEW;
3716
3717 vdbg_printk(TPACPI_DBG_INIT, "LED commands are %s, mode %d\n",
3718 str_supported(led_supported), led_supported);
3719
3720 return (led_supported != TPACPI_LED_NONE)? 0 : 1;
3721 }
3722
3723 #define led_status(s) ((s) == 0 ? "off" : ((s) == 1 ? "on" : "blinking"))
3724
3725 static int led_read(char *p)
3726 {
3727 int len = 0;
3728
3729 if (!led_supported) {
3730 len += sprintf(p + len, "status:\t\tnot supported\n");
3731 return len;
3732 }
3733 len += sprintf(p + len, "status:\t\tsupported\n");
3734
3735 if (led_supported == TPACPI_LED_570) {
3736 /* 570 */
3737 int i, status;
3738 for (i = 0; i < 8; i++) {
3739 if (!acpi_evalf(ec_handle,
3740 &status, "GLED", "dd", 1 << i))
3741 return -EIO;
3742 len += sprintf(p + len, "%d:\t\t%s\n",
3743 i, led_status(status));
3744 }
3745 }
3746
3747 len += sprintf(p + len, "commands:\t"
3748 "<led> on, <led> off, <led> blink (<led> is 0-7)\n");
3749
3750 return len;
3751 }
3752
3753 /* off, on, blink */
3754 static const int led_sled_arg1[] = { 0, 1, 3 };
3755 static const int led_exp_hlbl[] = { 0, 0, 1 }; /* led# * */
3756 static const int led_exp_hlcl[] = { 0, 1, 1 }; /* led# * */
3757 static const int led_led_arg1[] = { 0, 0x80, 0xc0 };
3758
3759 static int led_write(char *buf)
3760 {
3761 char *cmd;
3762 int led, ind, ret;
3763
3764 if (!led_supported)
3765 return -ENODEV;
3766
3767 while ((cmd = next_cmd(&buf))) {
3768 if (sscanf(cmd, "%d", &led) != 1 || led < 0 || led > 7)
3769 return -EINVAL;
3770
3771 if (strstr(cmd, "off")) {
3772 ind = 0;
3773 } else if (strstr(cmd, "on")) {
3774 ind = 1;
3775 } else if (strstr(cmd, "blink")) {
3776 ind = 2;
3777 } else
3778 return -EINVAL;
3779
3780 if (led_supported == TPACPI_LED_570) {
3781 /* 570 */
3782 led = 1 << led;
3783 if (!acpi_evalf(led_handle, NULL, NULL, "vdd",
3784 led, led_sled_arg1[ind]))
3785 return -EIO;
3786 } else if (led_supported == TPACPI_LED_OLD) {
3787 /* 600e/x, 770e, 770x, A21e, A2xm/p, T20-22, X20 */
3788 led = 1 << led;
3789 ret = ec_write(TPACPI_LED_EC_HLMS, led);
3790 if (ret >= 0)
3791 ret = ec_write(TPACPI_LED_EC_HLBL,
3792 led * led_exp_hlbl[ind]);
3793 if (ret >= 0)
3794 ret = ec_write(TPACPI_LED_EC_HLCL,
3795 led * led_exp_hlcl[ind]);
3796 if (ret < 0)
3797 return ret;
3798 } else {
3799 /* all others */
3800 if (!acpi_evalf(led_handle, NULL, NULL, "vdd",
3801 led, led_led_arg1[ind]))
3802 return -EIO;
3803 }
3804 }
3805
3806 return 0;
3807 }
3808
3809 static struct ibm_struct led_driver_data = {
3810 .name = "led",
3811 .read = led_read,
3812 .write = led_write,
3813 };
3814
3815 /*************************************************************************
3816 * Beep subdriver
3817 */
3818
3819 TPACPI_HANDLE(beep, ec, "BEEP"); /* all except R30, R31 */
3820
3821 static int __init beep_init(struct ibm_init_struct *iibm)
3822 {
3823 vdbg_printk(TPACPI_DBG_INIT, "initializing beep subdriver\n");
3824
3825 TPACPI_ACPIHANDLE_INIT(beep);
3826
3827 vdbg_printk(TPACPI_DBG_INIT, "beep is %s\n",
3828 str_supported(beep_handle != NULL));
3829
3830 return (beep_handle)? 0 : 1;
3831 }
3832
3833 static int beep_read(char *p)
3834 {
3835 int len = 0;
3836
3837 if (!beep_handle)
3838 len += sprintf(p + len, "status:\t\tnot supported\n");
3839 else {
3840 len += sprintf(p + len, "status:\t\tsupported\n");
3841 len += sprintf(p + len, "commands:\t<cmd> (<cmd> is 0-17)\n");
3842 }
3843
3844 return len;
3845 }
3846
3847 static int beep_write(char *buf)
3848 {
3849 char *cmd;
3850 int beep_cmd;
3851
3852 if (!beep_handle)
3853 return -ENODEV;
3854
3855 while ((cmd = next_cmd(&buf))) {
3856 if (sscanf(cmd, "%u", &beep_cmd) == 1 &&
3857 beep_cmd >= 0 && beep_cmd <= 17) {
3858 /* beep_cmd set */
3859 } else
3860 return -EINVAL;
3861 if (!acpi_evalf(beep_handle, NULL, NULL, "vdd", beep_cmd, 0))
3862 return -EIO;
3863 }
3864
3865 return 0;
3866 }
3867
3868 static struct ibm_struct beep_driver_data = {
3869 .name = "beep",
3870 .read = beep_read,
3871 .write = beep_write,
3872 };
3873
3874 /*************************************************************************
3875 * Thermal subdriver
3876 */
3877
3878 enum thermal_access_mode {
3879 TPACPI_THERMAL_NONE = 0, /* No thermal support */
3880 TPACPI_THERMAL_ACPI_TMP07, /* Use ACPI TMP0-7 */
3881 TPACPI_THERMAL_ACPI_UPDT, /* Use ACPI TMP0-7 with UPDT */
3882 TPACPI_THERMAL_TPEC_8, /* Use ACPI EC regs, 8 sensors */
3883 TPACPI_THERMAL_TPEC_16, /* Use ACPI EC regs, 16 sensors */
3884 };
3885
3886 enum { /* TPACPI_THERMAL_TPEC_* */
3887 TP_EC_THERMAL_TMP0 = 0x78, /* ACPI EC regs TMP 0..7 */
3888 TP_EC_THERMAL_TMP8 = 0xC0, /* ACPI EC regs TMP 8..15 */
3889 TP_EC_THERMAL_TMP_NA = -128, /* ACPI EC sensor not available */
3890 };
3891
3892 #define TPACPI_MAX_THERMAL_SENSORS 16 /* Max thermal sensors supported */
3893 struct ibm_thermal_sensors_struct {
3894 s32 temp[TPACPI_MAX_THERMAL_SENSORS];
3895 };
3896
3897 static enum thermal_access_mode thermal_read_mode;
3898
3899 /* idx is zero-based */
3900 static int thermal_get_sensor(int idx, s32 *value)
3901 {
3902 int t;
3903 s8 tmp;
3904 char tmpi[5];
3905
3906 t = TP_EC_THERMAL_TMP0;
3907
3908 switch (thermal_read_mode) {
3909 #if TPACPI_MAX_THERMAL_SENSORS >= 16
3910 case TPACPI_THERMAL_TPEC_16:
3911 if (idx >= 8 && idx <= 15) {
3912 t = TP_EC_THERMAL_TMP8;
3913 idx -= 8;
3914 }
3915 /* fallthrough */
3916 #endif
3917 case TPACPI_THERMAL_TPEC_8:
3918 if (idx <= 7) {
3919 if (!acpi_ec_read(t + idx, &tmp))
3920 return -EIO;
3921 *value = tmp * 1000;
3922 return 0;
3923 }
3924 break;
3925
3926 case TPACPI_THERMAL_ACPI_UPDT:
3927 if (idx <= 7) {
3928 snprintf(tmpi, sizeof(tmpi), "TMP%c", '0' + idx);
3929 if (!acpi_evalf(ec_handle, NULL, "UPDT", "v"))
3930 return -EIO;
3931 if (!acpi_evalf(ec_handle, &t, tmpi, "d"))
3932 return -EIO;
3933 *value = (t - 2732) * 100;
3934 return 0;
3935 }
3936 break;
3937
3938 case TPACPI_THERMAL_ACPI_TMP07:
3939 if (idx <= 7) {
3940 snprintf(tmpi, sizeof(tmpi), "TMP%c", '0' + idx);
3941 if (!acpi_evalf(ec_handle, &t, tmpi, "d"))
3942 return -EIO;
3943 if (t > 127 || t < -127)
3944 t = TP_EC_THERMAL_TMP_NA;
3945 *value = t * 1000;
3946 return 0;
3947 }
3948 break;
3949
3950 case TPACPI_THERMAL_NONE:
3951 default:
3952 return -ENOSYS;
3953 }
3954
3955 return -EINVAL;
3956 }
3957
3958 static int thermal_get_sensors(struct ibm_thermal_sensors_struct *s)
3959 {
3960 int res, i;
3961 int n;
3962
3963 n = 8;
3964 i = 0;
3965
3966 if (!s)
3967 return -EINVAL;
3968
3969 if (thermal_read_mode == TPACPI_THERMAL_TPEC_16)
3970 n = 16;
3971
3972 for (i = 0 ; i < n; i++) {
3973 res = thermal_get_sensor(i, &s->temp[i]);
3974 if (res)
3975 return res;
3976 }
3977
3978 return n;
3979 }
3980
3981 /* sysfs temp##_input -------------------------------------------------- */
3982
3983 static ssize_t thermal_temp_input_show(struct device *dev,
3984 struct device_attribute *attr,
3985 char *buf)
3986 {
3987 struct sensor_device_attribute *sensor_attr =
3988 to_sensor_dev_attr(attr);
3989 int idx = sensor_attr->index;
3990 s32 value;
3991 int res;
3992
3993 res = thermal_get_sensor(idx, &value);
3994 if (res)
3995 return res;
3996 if (value == TP_EC_THERMAL_TMP_NA * 1000)
3997 return -ENXIO;
3998
3999 return snprintf(buf, PAGE_SIZE, "%d\n", value);
4000 }
4001
4002 #define THERMAL_SENSOR_ATTR_TEMP(_idxA, _idxB) \
4003 SENSOR_ATTR(temp##_idxA##_input, S_IRUGO, \
4004 thermal_temp_input_show, NULL, _idxB)
4005
4006 static struct sensor_device_attribute sensor_dev_attr_thermal_temp_input[] = {
4007 THERMAL_SENSOR_ATTR_TEMP(1, 0),
4008 THERMAL_SENSOR_ATTR_TEMP(2, 1),
4009 THERMAL_SENSOR_ATTR_TEMP(3, 2),
4010 THERMAL_SENSOR_ATTR_TEMP(4, 3),
4011 THERMAL_SENSOR_ATTR_TEMP(5, 4),
4012 THERMAL_SENSOR_ATTR_TEMP(6, 5),
4013 THERMAL_SENSOR_ATTR_TEMP(7, 6),
4014 THERMAL_SENSOR_ATTR_TEMP(8, 7),
4015 THERMAL_SENSOR_ATTR_TEMP(9, 8),
4016 THERMAL_SENSOR_ATTR_TEMP(10, 9),
4017 THERMAL_SENSOR_ATTR_TEMP(11, 10),
4018 THERMAL_SENSOR_ATTR_TEMP(12, 11),
4019 THERMAL_SENSOR_ATTR_TEMP(13, 12),
4020 THERMAL_SENSOR_ATTR_TEMP(14, 13),
4021 THERMAL_SENSOR_ATTR_TEMP(15, 14),
4022 THERMAL_SENSOR_ATTR_TEMP(16, 15),
4023 };
4024
4025 #define THERMAL_ATTRS(X) \
4026 &sensor_dev_attr_thermal_temp_input[X].dev_attr.attr
4027
4028 static struct attribute *thermal_temp_input_attr[] = {
4029 THERMAL_ATTRS(8),
4030 THERMAL_ATTRS(9),
4031 THERMAL_ATTRS(10),
4032 THERMAL_ATTRS(11),
4033 THERMAL_ATTRS(12),
4034 THERMAL_ATTRS(13),
4035 THERMAL_ATTRS(14),
4036 THERMAL_ATTRS(15),
4037 THERMAL_ATTRS(0),
4038 THERMAL_ATTRS(1),
4039 THERMAL_ATTRS(2),
4040 THERMAL_ATTRS(3),
4041 THERMAL_ATTRS(4),
4042 THERMAL_ATTRS(5),
4043 THERMAL_ATTRS(6),
4044 THERMAL_ATTRS(7),
4045 NULL
4046 };
4047
4048 static const struct attribute_group thermal_temp_input16_group = {
4049 .attrs = thermal_temp_input_attr
4050 };
4051
4052 static const struct attribute_group thermal_temp_input8_group = {
4053 .attrs = &thermal_temp_input_attr[8]
4054 };
4055
4056 #undef THERMAL_SENSOR_ATTR_TEMP
4057 #undef THERMAL_ATTRS
4058
4059 /* --------------------------------------------------------------------- */
4060
4061 static int __init thermal_init(struct ibm_init_struct *iibm)
4062 {
4063 u8 t, ta1, ta2;
4064 int i;
4065 int acpi_tmp7;
4066 int res;
4067
4068 vdbg_printk(TPACPI_DBG_INIT, "initializing thermal subdriver\n");
4069
4070 acpi_tmp7 = acpi_evalf(ec_handle, NULL, "TMP7", "qv");
4071
4072 if (thinkpad_id.ec_model) {
4073 /*
4074 * Direct EC access mode: sensors at registers
4075 * 0x78-0x7F, 0xC0-0xC7. Registers return 0x00 for
4076 * non-implemented, thermal sensors return 0x80 when
4077 * not available
4078 */
4079
4080 ta1 = ta2 = 0;
4081 for (i = 0; i < 8; i++) {
4082 if (acpi_ec_read(TP_EC_THERMAL_TMP0 + i, &t)) {
4083 ta1 |= t;
4084 } else {
4085 ta1 = 0;
4086 break;
4087 }
4088 if (acpi_ec_read(TP_EC_THERMAL_TMP8 + i, &t)) {
4089 ta2 |= t;
4090 } else {
4091 ta1 = 0;
4092 break;
4093 }
4094 }
4095 if (ta1 == 0) {
4096 /* This is sheer paranoia, but we handle it anyway */
4097 if (acpi_tmp7) {
4098 printk(TPACPI_ERR
4099 "ThinkPad ACPI EC access misbehaving, "
4100 "falling back to ACPI TMPx access "
4101 "mode\n");
4102 thermal_read_mode = TPACPI_THERMAL_ACPI_TMP07;
4103 } else {
4104 printk(TPACPI_ERR
4105 "ThinkPad ACPI EC access misbehaving, "
4106 "disabling thermal sensors access\n");
4107 thermal_read_mode = TPACPI_THERMAL_NONE;
4108 }
4109 } else {
4110 thermal_read_mode =
4111 (ta2 != 0) ?
4112 TPACPI_THERMAL_TPEC_16 : TPACPI_THERMAL_TPEC_8;
4113 }
4114 } else if (acpi_tmp7) {
4115 if (acpi_evalf(ec_handle, NULL, "UPDT", "qv")) {
4116 /* 600e/x, 770e, 770x */
4117 thermal_read_mode = TPACPI_THERMAL_ACPI_UPDT;
4118 } else {
4119 /* Standard ACPI TMPx access, max 8 sensors */
4120 thermal_read_mode = TPACPI_THERMAL_ACPI_TMP07;
4121 }
4122 } else {
4123 /* temperatures not supported on 570, G4x, R30, R31, R32 */
4124 thermal_read_mode = TPACPI_THERMAL_NONE;
4125 }
4126
4127 vdbg_printk(TPACPI_DBG_INIT, "thermal is %s, mode %d\n",
4128 str_supported(thermal_read_mode != TPACPI_THERMAL_NONE),
4129 thermal_read_mode);
4130
4131 switch (thermal_read_mode) {
4132 case TPACPI_THERMAL_TPEC_16:
4133 res = sysfs_create_group(&tpacpi_sensors_pdev->dev.kobj,
4134 &thermal_temp_input16_group);
4135 if (res)
4136 return res;
4137 break;
4138 case TPACPI_THERMAL_TPEC_8:
4139 case TPACPI_THERMAL_ACPI_TMP07:
4140 case TPACPI_THERMAL_ACPI_UPDT:
4141 res = sysfs_create_group(&tpacpi_sensors_pdev->dev.kobj,
4142 &thermal_temp_input8_group);
4143 if (res)
4144 return res;
4145 break;
4146 case TPACPI_THERMAL_NONE:
4147 default:
4148 return 1;
4149 }
4150
4151 return 0;
4152 }
4153
4154 static void thermal_exit(void)
4155 {
4156 switch (thermal_read_mode) {
4157 case TPACPI_THERMAL_TPEC_16:
4158 sysfs_remove_group(&tpacpi_sensors_pdev->dev.kobj,
4159 &thermal_temp_input16_group);
4160 break;
4161 case TPACPI_THERMAL_TPEC_8:
4162 case TPACPI_THERMAL_ACPI_TMP07:
4163 case TPACPI_THERMAL_ACPI_UPDT:
4164 sysfs_remove_group(&tpacpi_sensors_pdev->dev.kobj,
4165 &thermal_temp_input16_group);
4166 break;
4167 case TPACPI_THERMAL_NONE:
4168 default:
4169 break;
4170 }
4171 }
4172
4173 static int thermal_read(char *p)
4174 {
4175 int len = 0;
4176 int n, i;
4177 struct ibm_thermal_sensors_struct t;
4178
4179 n = thermal_get_sensors(&t);
4180 if (unlikely(n < 0))
4181 return n;
4182
4183 len += sprintf(p + len, "temperatures:\t");
4184
4185 if (n > 0) {
4186 for (i = 0; i < (n - 1); i++)
4187 len += sprintf(p + len, "%d ", t.temp[i] / 1000);
4188 len += sprintf(p + len, "%d\n", t.temp[i] / 1000);
4189 } else
4190 len += sprintf(p + len, "not supported\n");
4191
4192 return len;
4193 }
4194
4195 static struct ibm_struct thermal_driver_data = {
4196 .name = "thermal",
4197 .read = thermal_read,
4198 .exit = thermal_exit,
4199 };
4200
4201 /*************************************************************************
4202 * EC Dump subdriver
4203 */
4204
4205 static u8 ecdump_regs[256];
4206
4207 static int ecdump_read(char *p)
4208 {
4209 int len = 0;
4210 int i, j;
4211 u8 v;
4212
4213 len += sprintf(p + len, "EC "
4214 " +00 +01 +02 +03 +04 +05 +06 +07"
4215 " +08 +09 +0a +0b +0c +0d +0e +0f\n");
4216 for (i = 0; i < 256; i += 16) {
4217 len += sprintf(p + len, "EC 0x%02x:", i);
4218 for (j = 0; j < 16; j++) {
4219 if (!acpi_ec_read(i + j, &v))
4220 break;
4221 if (v != ecdump_regs[i + j])
4222 len += sprintf(p + len, " *%02x", v);
4223 else
4224 len += sprintf(p + len, " %02x", v);
4225 ecdump_regs[i + j] = v;
4226 }
4227 len += sprintf(p + len, "\n");
4228 if (j != 16)
4229 break;
4230 }
4231
4232 /* These are way too dangerous to advertise openly... */
4233 #if 0
4234 len += sprintf(p + len, "commands:\t0x<offset> 0x<value>"
4235 " (<offset> is 00-ff, <value> is 00-ff)\n");
4236 len += sprintf(p + len, "commands:\t0x<offset> <value> "
4237 " (<offset> is 00-ff, <value> is 0-255)\n");
4238 #endif
4239 return len;
4240 }
4241
4242 static int ecdump_write(char *buf)
4243 {
4244 char *cmd;
4245 int i, v;
4246
4247 while ((cmd = next_cmd(&buf))) {
4248 if (sscanf(cmd, "0x%x 0x%x", &i, &v) == 2) {
4249 /* i and v set */
4250 } else if (sscanf(cmd, "0x%x %u", &i, &v) == 2) {
4251 /* i and v set */
4252 } else
4253 return -EINVAL;
4254 if (i >= 0 && i < 256 && v >= 0 && v < 256) {
4255 if (!acpi_ec_write(i, v))
4256 return -EIO;
4257 } else
4258 return -EINVAL;
4259 }
4260
4261 return 0;
4262 }
4263
4264 static struct ibm_struct ecdump_driver_data = {
4265 .name = "ecdump",
4266 .read = ecdump_read,
4267 .write = ecdump_write,
4268 .flags.experimental = 1,
4269 };
4270
4271 /*************************************************************************
4272 * Backlight/brightness subdriver
4273 */
4274
4275 #define TPACPI_BACKLIGHT_DEV_NAME "thinkpad_screen"
4276
4277 static struct backlight_device *ibm_backlight_device;
4278 static int brightness_offset = 0x31;
4279 static int brightness_mode;
4280 static unsigned int brightness_enable = 2; /* 2 = auto, 0 = no, 1 = yes */
4281
4282 static struct mutex brightness_mutex;
4283
4284 /*
4285 * ThinkPads can read brightness from two places: EC 0x31, or
4286 * CMOS NVRAM byte 0x5E, bits 0-3.
4287 */
4288 static int brightness_get(struct backlight_device *bd)
4289 {
4290 u8 lec = 0, lcmos = 0, level = 0;
4291
4292 if (brightness_mode & 1) {
4293 if (!acpi_ec_read(brightness_offset, &lec))
4294 return -EIO;
4295 lec &= (tp_features.bright_16levels)? 0x0f : 0x07;
4296 level = lec;
4297 };
4298 if (brightness_mode & 2) {
4299 lcmos = (nvram_read_byte(TP_NVRAM_ADDR_BRIGHTNESS)
4300 & TP_NVRAM_MASK_LEVEL_BRIGHTNESS)
4301 >> TP_NVRAM_POS_LEVEL_BRIGHTNESS;
4302 lcmos &= (tp_features.bright_16levels)? 0x0f : 0x07;
4303 level = lcmos;
4304 }
4305
4306 if (brightness_mode == 3 && lec != lcmos) {
4307 printk(TPACPI_ERR
4308 "CMOS NVRAM (%u) and EC (%u) do not agree "
4309 "on display brightness level\n",
4310 (unsigned int) lcmos,
4311 (unsigned int) lec);
4312 return -EIO;
4313 }
4314
4315 return level;
4316 }
4317
4318 /* May return EINTR which can always be mapped to ERESTARTSYS */
4319 static int brightness_set(int value)
4320 {
4321 int cmos_cmd, inc, i, res;
4322 int current_value;
4323
4324 if (value > ((tp_features.bright_16levels)? 15 : 7))
4325 return -EINVAL;
4326
4327 res = mutex_lock_interruptible(&brightness_mutex);
4328 if (res < 0)
4329 return res;
4330
4331 current_value = brightness_get(NULL);
4332 if (current_value < 0) {
4333 res = current_value;
4334 goto errout;
4335 }
4336
4337 cmos_cmd = value > current_value ?
4338 TP_CMOS_BRIGHTNESS_UP :
4339 TP_CMOS_BRIGHTNESS_DOWN;
4340 inc = (value > current_value)? 1 : -1;
4341
4342 res = 0;
4343 for (i = current_value; i != value; i += inc) {
4344 if ((brightness_mode & 2) &&
4345 issue_thinkpad_cmos_command(cmos_cmd)) {
4346 res = -EIO;
4347 goto errout;
4348 }
4349 if ((brightness_mode & 1) &&
4350 !acpi_ec_write(brightness_offset, i + inc)) {
4351 res = -EIO;
4352 goto errout;;
4353 }
4354 }
4355
4356 errout:
4357 mutex_unlock(&brightness_mutex);
4358 return res;
4359 }
4360
4361 /* sysfs backlight class ----------------------------------------------- */
4362
4363 static int brightness_update_status(struct backlight_device *bd)
4364 {
4365 /* it is the backlight class's job (caller) to handle
4366 * EINTR and other errors properly */
4367 return brightness_set(
4368 (bd->props.fb_blank == FB_BLANK_UNBLANK &&
4369 bd->props.power == FB_BLANK_UNBLANK) ?
4370 bd->props.brightness : 0);
4371 }
4372
4373 static struct backlight_ops ibm_backlight_data = {
4374 .get_brightness = brightness_get,
4375 .update_status = brightness_update_status,
4376 };
4377
4378 /* --------------------------------------------------------------------- */
4379
4380 static int __init brightness_init(struct ibm_init_struct *iibm)
4381 {
4382 int b;
4383
4384 vdbg_printk(TPACPI_DBG_INIT, "initializing brightness subdriver\n");
4385
4386 mutex_init(&brightness_mutex);
4387
4388 /*
4389 * We always attempt to detect acpi support, so as to switch
4390 * Lenovo Vista BIOS to ACPI brightness mode even if we are not
4391 * going to publish a backlight interface
4392 */
4393 b = tpacpi_check_std_acpi_brightness_support();
4394 if (b > 0) {
4395 if (thinkpad_id.vendor == PCI_VENDOR_ID_LENOVO) {
4396 printk(TPACPI_NOTICE
4397 "Lenovo BIOS switched to ACPI backlight "
4398 "control mode\n");
4399 }
4400 if (brightness_enable > 1) {
4401 printk(TPACPI_NOTICE
4402 "standard ACPI backlight interface "
4403 "available, not loading native one...\n");
4404 return 1;
4405 }
4406 }
4407
4408 if (!brightness_enable) {
4409 dbg_printk(TPACPI_DBG_INIT,
4410 "brightness support disabled by "
4411 "module parameter\n");
4412 return 1;
4413 }
4414
4415 if (b > 16) {
4416 printk(TPACPI_ERR
4417 "Unsupported brightness interface, "
4418 "please contact %s\n", TPACPI_MAIL);
4419 return 1;
4420 }
4421 if (b == 16)
4422 tp_features.bright_16levels = 1;
4423
4424 if (!brightness_mode) {
4425 if (thinkpad_id.vendor == PCI_VENDOR_ID_LENOVO)
4426 brightness_mode = 2;
4427 else
4428 brightness_mode = 3;
4429
4430 dbg_printk(TPACPI_DBG_INIT, "selected brightness_mode=%d\n",
4431 brightness_mode);
4432 }
4433
4434 if (brightness_mode > 3)
4435 return -EINVAL;
4436
4437 b = brightness_get(NULL);
4438 if (b < 0)
4439 return 1;
4440
4441 if (tp_features.bright_16levels)
4442 printk(TPACPI_INFO
4443 "detected a 16-level brightness capable ThinkPad\n");
4444
4445 ibm_backlight_device = backlight_device_register(
4446 TPACPI_BACKLIGHT_DEV_NAME, NULL, NULL,
4447 &ibm_backlight_data);
4448 if (IS_ERR(ibm_backlight_device)) {
4449 printk(TPACPI_ERR "Could not register backlight device\n");
4450 return PTR_ERR(ibm_backlight_device);
4451 }
4452 vdbg_printk(TPACPI_DBG_INIT, "brightness is supported\n");
4453
4454 ibm_backlight_device->props.max_brightness =
4455 (tp_features.bright_16levels)? 15 : 7;
4456 ibm_backlight_device->props.brightness = b;
4457 backlight_update_status(ibm_backlight_device);
4458
4459 return 0;
4460 }
4461
4462 static void brightness_exit(void)
4463 {
4464 if (ibm_backlight_device) {
4465 vdbg_printk(TPACPI_DBG_EXIT,
4466 "calling backlight_device_unregister()\n");
4467 backlight_device_unregister(ibm_backlight_device);
4468 ibm_backlight_device = NULL;
4469 }
4470 }
4471
4472 static int brightness_read(char *p)
4473 {
4474 int len = 0;
4475 int level;
4476
4477 level = brightness_get(NULL);
4478 if (level < 0) {
4479 len += sprintf(p + len, "level:\t\tunreadable\n");
4480 } else {
4481 len += sprintf(p + len, "level:\t\t%d\n", level);
4482 len += sprintf(p + len, "commands:\tup, down\n");
4483 len += sprintf(p + len, "commands:\tlevel <level>"
4484 " (<level> is 0-%d)\n",
4485 (tp_features.bright_16levels) ? 15 : 7);
4486 }
4487
4488 return len;
4489 }
4490
4491 static int brightness_write(char *buf)
4492 {
4493 int level;
4494 int rc;
4495 char *cmd;
4496 int max_level = (tp_features.bright_16levels) ? 15 : 7;
4497
4498 level = brightness_get(NULL);
4499 if (level < 0)
4500 return level;
4501
4502 while ((cmd = next_cmd(&buf))) {
4503 if (strlencmp(cmd, "up") == 0) {
4504 if (level < max_level)
4505 level++;
4506 } else if (strlencmp(cmd, "down") == 0) {
4507 if (level > 0)
4508 level--;
4509 } else if (sscanf(cmd, "level %d", &level) == 1 &&
4510 level >= 0 && level <= max_level) {
4511 /* new level set */
4512 } else
4513 return -EINVAL;
4514 }
4515
4516 /*
4517 * Now we know what the final level should be, so we try to set it.
4518 * Doing it this way makes the syscall restartable in case of EINTR
4519 */
4520 rc = brightness_set(level);
4521 return (rc == -EINTR)? ERESTARTSYS : rc;
4522 }
4523
4524 static struct ibm_struct brightness_driver_data = {
4525 .name = "brightness",
4526 .read = brightness_read,
4527 .write = brightness_write,
4528 .exit = brightness_exit,
4529 };
4530
4531 /*************************************************************************
4532 * Volume subdriver
4533 */
4534
4535 static int volume_offset = 0x30;
4536
4537 static int volume_read(char *p)
4538 {
4539 int len = 0;
4540 u8 level;
4541
4542 if (!acpi_ec_read(volume_offset, &level)) {
4543 len += sprintf(p + len, "level:\t\tunreadable\n");
4544 } else {
4545 len += sprintf(p + len, "level:\t\t%d\n", level & 0xf);
4546 len += sprintf(p + len, "mute:\t\t%s\n", onoff(level, 6));
4547 len += sprintf(p + len, "commands:\tup, down, mute\n");
4548 len += sprintf(p + len, "commands:\tlevel <level>"
4549 " (<level> is 0-15)\n");
4550 }
4551
4552 return len;
4553 }
4554
4555 static int volume_write(char *buf)
4556 {
4557 int cmos_cmd, inc, i;
4558 u8 level, mute;
4559 int new_level, new_mute;
4560 char *cmd;
4561
4562 while ((cmd = next_cmd(&buf))) {
4563 if (!acpi_ec_read(volume_offset, &level))
4564 return -EIO;
4565 new_mute = mute = level & 0x40;
4566 new_level = level = level & 0xf;
4567
4568 if (strlencmp(cmd, "up") == 0) {
4569 if (mute)
4570 new_mute = 0;
4571 else
4572 new_level = level == 15 ? 15 : level + 1;
4573 } else if (strlencmp(cmd, "down") == 0) {
4574 if (mute)
4575 new_mute = 0;
4576 else
4577 new_level = level == 0 ? 0 : level - 1;
4578 } else if (sscanf(cmd, "level %d", &new_level) == 1 &&
4579 new_level >= 0 && new_level <= 15) {
4580 /* new_level set */
4581 } else if (strlencmp(cmd, "mute") == 0) {
4582 new_mute = 0x40;
4583 } else
4584 return -EINVAL;
4585
4586 if (new_level != level) {
4587 /* mute doesn't change */
4588
4589 cmos_cmd = (new_level > level) ?
4590 TP_CMOS_VOLUME_UP : TP_CMOS_VOLUME_DOWN;
4591 inc = new_level > level ? 1 : -1;
4592
4593 if (mute && (issue_thinkpad_cmos_command(cmos_cmd) ||
4594 !acpi_ec_write(volume_offset, level)))
4595 return -EIO;
4596
4597 for (i = level; i != new_level; i += inc)
4598 if (issue_thinkpad_cmos_command(cmos_cmd) ||
4599 !acpi_ec_write(volume_offset, i + inc))
4600 return -EIO;
4601
4602 if (mute &&
4603 (issue_thinkpad_cmos_command(TP_CMOS_VOLUME_MUTE) ||
4604 !acpi_ec_write(volume_offset, new_level + mute))) {
4605 return -EIO;
4606 }
4607 }
4608
4609 if (new_mute != mute) {
4610 /* level doesn't change */
4611
4612 cmos_cmd = (new_mute) ?
4613 TP_CMOS_VOLUME_MUTE : TP_CMOS_VOLUME_UP;
4614
4615 if (issue_thinkpad_cmos_command(cmos_cmd) ||
4616 !acpi_ec_write(volume_offset, level + new_mute))
4617 return -EIO;
4618 }
4619 }
4620
4621 return 0;
4622 }
4623
4624 static struct ibm_struct volume_driver_data = {
4625 .name = "volume",
4626 .read = volume_read,
4627 .write = volume_write,
4628 };
4629
4630 /*************************************************************************
4631 * Fan subdriver
4632 */
4633
4634 /*
4635 * FAN ACCESS MODES
4636 *
4637 * TPACPI_FAN_RD_ACPI_GFAN:
4638 * ACPI GFAN method: returns fan level
4639 *
4640 * see TPACPI_FAN_WR_ACPI_SFAN
4641 * EC 0x2f (HFSP) not available if GFAN exists
4642 *
4643 * TPACPI_FAN_WR_ACPI_SFAN:
4644 * ACPI SFAN method: sets fan level, 0 (stop) to 7 (max)
4645 *
4646 * EC 0x2f (HFSP) might be available *for reading*, but do not use
4647 * it for writing.
4648 *
4649 * TPACPI_FAN_WR_TPEC:
4650 * ThinkPad EC register 0x2f (HFSP): fan control loop mode
4651 * Supported on almost all ThinkPads
4652 *
4653 * Fan speed changes of any sort (including those caused by the
4654 * disengaged mode) are usually done slowly by the firmware as the
4655 * maximum ammount of fan duty cycle change per second seems to be
4656 * limited.
4657 *
4658 * Reading is not available if GFAN exists.
4659 * Writing is not available if SFAN exists.
4660 *
4661 * Bits
4662 * 7 automatic mode engaged;
4663 * (default operation mode of the ThinkPad)
4664 * fan level is ignored in this mode.
4665 * 6 full speed mode (takes precedence over bit 7);
4666 * not available on all thinkpads. May disable
4667 * the tachometer while the fan controller ramps up
4668 * the speed (which can take up to a few *minutes*).
4669 * Speeds up fan to 100% duty-cycle, which is far above
4670 * the standard RPM levels. It is not impossible that
4671 * it could cause hardware damage.
4672 * 5-3 unused in some models. Extra bits for fan level
4673 * in others, but still useless as all values above
4674 * 7 map to the same speed as level 7 in these models.
4675 * 2-0 fan level (0..7 usually)
4676 * 0x00 = stop
4677 * 0x07 = max (set when temperatures critical)
4678 * Some ThinkPads may have other levels, see
4679 * TPACPI_FAN_WR_ACPI_FANS (X31/X40/X41)
4680 *
4681 * FIRMWARE BUG: on some models, EC 0x2f might not be initialized at
4682 * boot. Apparently the EC does not intialize it, so unless ACPI DSDT
4683 * does so, its initial value is meaningless (0x07).
4684 *
4685 * For firmware bugs, refer to:
4686 * http://thinkwiki.org/wiki/Embedded_Controller_Firmware#Firmware_Issues
4687 *
4688 * ----
4689 *
4690 * ThinkPad EC register 0x84 (LSB), 0x85 (MSB):
4691 * Main fan tachometer reading (in RPM)
4692 *
4693 * This register is present on all ThinkPads with a new-style EC, and
4694 * it is known not to be present on the A21m/e, and T22, as there is
4695 * something else in offset 0x84 according to the ACPI DSDT. Other
4696 * ThinkPads from this same time period (and earlier) probably lack the
4697 * tachometer as well.
4698 *
4699 * Unfortunately a lot of ThinkPads with new-style ECs but whose firwmare
4700 * was never fixed by IBM to report the EC firmware version string
4701 * probably support the tachometer (like the early X models), so
4702 * detecting it is quite hard. We need more data to know for sure.
4703 *
4704 * FIRMWARE BUG: always read 0x84 first, otherwise incorrect readings
4705 * might result.
4706 *
4707 * FIRMWARE BUG: may go stale while the EC is switching to full speed
4708 * mode.
4709 *
4710 * For firmware bugs, refer to:
4711 * http://thinkwiki.org/wiki/Embedded_Controller_Firmware#Firmware_Issues
4712 *
4713 * TPACPI_FAN_WR_ACPI_FANS:
4714 * ThinkPad X31, X40, X41. Not available in the X60.
4715 *
4716 * FANS ACPI handle: takes three arguments: low speed, medium speed,
4717 * high speed. ACPI DSDT seems to map these three speeds to levels
4718 * as follows: STOP LOW LOW MED MED HIGH HIGH HIGH HIGH
4719 * (this map is stored on FAN0..FAN8 as "0,1,1,2,2,3,3,3,3")
4720 *
4721 * The speeds are stored on handles
4722 * (FANA:FAN9), (FANC:FANB), (FANE:FAND).
4723 *
4724 * There are three default speed sets, acessible as handles:
4725 * FS1L,FS1M,FS1H; FS2L,FS2M,FS2H; FS3L,FS3M,FS3H
4726 *
4727 * ACPI DSDT switches which set is in use depending on various
4728 * factors.
4729 *
4730 * TPACPI_FAN_WR_TPEC is also available and should be used to
4731 * command the fan. The X31/X40/X41 seems to have 8 fan levels,
4732 * but the ACPI tables just mention level 7.
4733 */
4734
4735 enum { /* Fan control constants */
4736 fan_status_offset = 0x2f, /* EC register 0x2f */
4737 fan_rpm_offset = 0x84, /* EC register 0x84: LSB, 0x85 MSB (RPM)
4738 * 0x84 must be read before 0x85 */
4739
4740 TP_EC_FAN_FULLSPEED = 0x40, /* EC fan mode: full speed */
4741 TP_EC_FAN_AUTO = 0x80, /* EC fan mode: auto fan control */
4742
4743 TPACPI_FAN_LAST_LEVEL = 0x100, /* Use cached last-seen fan level */
4744 };
4745
4746 enum fan_status_access_mode {
4747 TPACPI_FAN_NONE = 0, /* No fan status or control */
4748 TPACPI_FAN_RD_ACPI_GFAN, /* Use ACPI GFAN */
4749 TPACPI_FAN_RD_TPEC, /* Use ACPI EC regs 0x2f, 0x84-0x85 */
4750 };
4751
4752 enum fan_control_access_mode {
4753 TPACPI_FAN_WR_NONE = 0, /* No fan control */
4754 TPACPI_FAN_WR_ACPI_SFAN, /* Use ACPI SFAN */
4755 TPACPI_FAN_WR_TPEC, /* Use ACPI EC reg 0x2f */
4756 TPACPI_FAN_WR_ACPI_FANS, /* Use ACPI FANS and EC reg 0x2f */
4757 };
4758
4759 enum fan_control_commands {
4760 TPACPI_FAN_CMD_SPEED = 0x0001, /* speed command */
4761 TPACPI_FAN_CMD_LEVEL = 0x0002, /* level command */
4762 TPACPI_FAN_CMD_ENABLE = 0x0004, /* enable/disable cmd,
4763 * and also watchdog cmd */
4764 };
4765
4766 static int fan_control_allowed;
4767
4768 static enum fan_status_access_mode fan_status_access_mode;
4769 static enum fan_control_access_mode fan_control_access_mode;
4770 static enum fan_control_commands fan_control_commands;
4771
4772 static u8 fan_control_initial_status;
4773 static u8 fan_control_desired_level;
4774 static int fan_watchdog_maxinterval;
4775
4776 static struct mutex fan_mutex;
4777
4778 static void fan_watchdog_fire(struct work_struct *ignored);
4779 static DECLARE_DELAYED_WORK(fan_watchdog_task, fan_watchdog_fire);
4780
4781 TPACPI_HANDLE(fans, ec, "FANS"); /* X31, X40, X41 */
4782 TPACPI_HANDLE(gfan, ec, "GFAN", /* 570 */
4783 "\\FSPD", /* 600e/x, 770e, 770x */
4784 ); /* all others */
4785 TPACPI_HANDLE(sfan, ec, "SFAN", /* 570 */
4786 "JFNS", /* 770x-JL */
4787 ); /* all others */
4788
4789 /*
4790 * Call with fan_mutex held
4791 */
4792 static void fan_update_desired_level(u8 status)
4793 {
4794 if ((status &
4795 (TP_EC_FAN_AUTO | TP_EC_FAN_FULLSPEED)) == 0) {
4796 if (status > 7)
4797 fan_control_desired_level = 7;
4798 else
4799 fan_control_desired_level = status;
4800 }
4801 }
4802
4803 static int fan_get_status(u8 *status)
4804 {
4805 u8 s;
4806
4807 /* TODO:
4808 * Add TPACPI_FAN_RD_ACPI_FANS ? */
4809
4810 switch (fan_status_access_mode) {
4811 case TPACPI_FAN_RD_ACPI_GFAN:
4812 /* 570, 600e/x, 770e, 770x */
4813
4814 if (unlikely(!acpi_evalf(gfan_handle, &s, NULL, "d")))
4815 return -EIO;
4816
4817 if (likely(status))
4818 *status = s & 0x07;
4819
4820 break;
4821
4822 case TPACPI_FAN_RD_TPEC:
4823 /* all except 570, 600e/x, 770e, 770x */
4824 if (unlikely(!acpi_ec_read(fan_status_offset, &s)))
4825 return -EIO;
4826
4827 if (likely(status))
4828 *status = s;
4829
4830 break;
4831
4832 default:
4833 return -ENXIO;
4834 }
4835
4836 return 0;
4837 }
4838
4839 static int fan_get_status_safe(u8 *status)
4840 {
4841 int rc;
4842 u8 s;
4843
4844 if (mutex_lock_interruptible(&fan_mutex))
4845 return -ERESTARTSYS;
4846 rc = fan_get_status(&s);
4847 if (!rc)
4848 fan_update_desired_level(s);
4849 mutex_unlock(&fan_mutex);
4850
4851 if (status)
4852 *status = s;
4853
4854 return rc;
4855 }
4856
4857 static int fan_get_speed(unsigned int *speed)
4858 {
4859 u8 hi, lo;
4860
4861 switch (fan_status_access_mode) {
4862 case TPACPI_FAN_RD_TPEC:
4863 /* all except 570, 600e/x, 770e, 770x */
4864 if (unlikely(!acpi_ec_read(fan_rpm_offset, &lo) ||
4865 !acpi_ec_read(fan_rpm_offset + 1, &hi)))
4866 return -EIO;
4867
4868 if (likely(speed))
4869 *speed = (hi << 8) | lo;
4870
4871 break;
4872
4873 default:
4874 return -ENXIO;
4875 }
4876
4877 return 0;
4878 }
4879
4880 static int fan_set_level(int level)
4881 {
4882 if (!fan_control_allowed)
4883 return -EPERM;
4884
4885 switch (fan_control_access_mode) {
4886 case TPACPI_FAN_WR_ACPI_SFAN:
4887 if (level >= 0 && level <= 7) {
4888 if (!acpi_evalf(sfan_handle, NULL, NULL, "vd", level))
4889 return -EIO;
4890 } else
4891 return -EINVAL;
4892 break;
4893
4894 case TPACPI_FAN_WR_ACPI_FANS:
4895 case TPACPI_FAN_WR_TPEC:
4896 if ((level != TP_EC_FAN_AUTO) &&
4897 (level != TP_EC_FAN_FULLSPEED) &&
4898 ((level < 0) || (level > 7)))
4899 return -EINVAL;
4900
4901 /* safety net should the EC not support AUTO
4902 * or FULLSPEED mode bits and just ignore them */
4903 if (level & TP_EC_FAN_FULLSPEED)
4904 level |= 7; /* safety min speed 7 */
4905 else if (level & TP_EC_FAN_AUTO)
4906 level |= 4; /* safety min speed 4 */
4907
4908 if (!acpi_ec_write(fan_status_offset, level))
4909 return -EIO;
4910 else
4911 tp_features.fan_ctrl_status_undef = 0;
4912 break;
4913
4914 default:
4915 return -ENXIO;
4916 }
4917 return 0;
4918 }
4919
4920 static int fan_set_level_safe(int level)
4921 {
4922 int rc;
4923
4924 if (!fan_control_allowed)
4925 return -EPERM;
4926
4927 if (mutex_lock_interruptible(&fan_mutex))
4928 return -ERESTARTSYS;
4929
4930 if (level == TPACPI_FAN_LAST_LEVEL)
4931 level = fan_control_desired_level;
4932
4933 rc = fan_set_level(level);
4934 if (!rc)
4935 fan_update_desired_level(level);
4936
4937 mutex_unlock(&fan_mutex);
4938 return rc;
4939 }
4940
4941 static int fan_set_enable(void)
4942 {
4943 u8 s;
4944 int rc;
4945
4946 if (!fan_control_allowed)
4947 return -EPERM;
4948
4949 if (mutex_lock_interruptible(&fan_mutex))
4950 return -ERESTARTSYS;
4951
4952 switch (fan_control_access_mode) {
4953 case TPACPI_FAN_WR_ACPI_FANS:
4954 case TPACPI_FAN_WR_TPEC:
4955 rc = fan_get_status(&s);
4956 if (rc < 0)
4957 break;
4958
4959 /* Don't go out of emergency fan mode */
4960 if (s != 7) {
4961 s &= 0x07;
4962 s |= TP_EC_FAN_AUTO | 4; /* min fan speed 4 */
4963 }
4964
4965 if (!acpi_ec_write(fan_status_offset, s))
4966 rc = -EIO;
4967 else {
4968 tp_features.fan_ctrl_status_undef = 0;
4969 rc = 0;
4970 }
4971 break;
4972
4973 case TPACPI_FAN_WR_ACPI_SFAN:
4974 rc = fan_get_status(&s);
4975 if (rc < 0)
4976 break;
4977
4978 s &= 0x07;
4979
4980 /* Set fan to at least level 4 */
4981 s |= 4;
4982
4983 if (!acpi_evalf(sfan_handle, NULL, NULL, "vd", s))
4984 rc = -EIO;
4985 else
4986 rc = 0;
4987 break;
4988
4989 default:
4990 rc = -ENXIO;
4991 }
4992
4993 mutex_unlock(&fan_mutex);
4994 return rc;
4995 }
4996
4997 static int fan_set_disable(void)
4998 {
4999 int rc;
5000
5001 if (!fan_control_allowed)
5002 return -EPERM;
5003
5004 if (mutex_lock_interruptible(&fan_mutex))
5005 return -ERESTARTSYS;
5006
5007 rc = 0;
5008 switch (fan_control_access_mode) {
5009 case TPACPI_FAN_WR_ACPI_FANS:
5010 case TPACPI_FAN_WR_TPEC:
5011 if (!acpi_ec_write(fan_status_offset, 0x00))
5012 rc = -EIO;
5013 else {
5014 fan_control_desired_level = 0;
5015 tp_features.fan_ctrl_status_undef = 0;
5016 }
5017 break;
5018
5019 case TPACPI_FAN_WR_ACPI_SFAN:
5020 if (!acpi_evalf(sfan_handle, NULL, NULL, "vd", 0x00))
5021 rc = -EIO;
5022 else
5023 fan_control_desired_level = 0;
5024 break;
5025
5026 default:
5027 rc = -ENXIO;
5028 }
5029
5030
5031 mutex_unlock(&fan_mutex);
5032 return rc;
5033 }
5034
5035 static int fan_set_speed(int speed)
5036 {
5037 int rc;
5038
5039 if (!fan_control_allowed)
5040 return -EPERM;
5041
5042 if (mutex_lock_interruptible(&fan_mutex))
5043 return -ERESTARTSYS;
5044
5045 rc = 0;
5046 switch (fan_control_access_mode) {
5047 case TPACPI_FAN_WR_ACPI_FANS:
5048 if (speed >= 0 && speed <= 65535) {
5049 if (!acpi_evalf(fans_handle, NULL, NULL, "vddd",
5050 speed, speed, speed))
5051 rc = -EIO;
5052 } else
5053 rc = -EINVAL;
5054 break;
5055
5056 default:
5057 rc = -ENXIO;
5058 }
5059
5060 mutex_unlock(&fan_mutex);
5061 return rc;
5062 }
5063
5064 static void fan_watchdog_reset(void)
5065 {
5066 static int fan_watchdog_active;
5067
5068 if (fan_control_access_mode == TPACPI_FAN_WR_NONE)
5069 return;
5070
5071 if (fan_watchdog_active)
5072 cancel_delayed_work(&fan_watchdog_task);
5073
5074 if (fan_watchdog_maxinterval > 0 &&
5075 tpacpi_lifecycle != TPACPI_LIFE_EXITING) {
5076 fan_watchdog_active = 1;
5077 if (!schedule_delayed_work(&fan_watchdog_task,
5078 msecs_to_jiffies(fan_watchdog_maxinterval
5079 * 1000))) {
5080 printk(TPACPI_ERR
5081 "failed to schedule the fan watchdog, "
5082 "watchdog will not trigger\n");
5083 }
5084 } else
5085 fan_watchdog_active = 0;
5086 }
5087
5088 static void fan_watchdog_fire(struct work_struct *ignored)
5089 {
5090 int rc;
5091
5092 if (tpacpi_lifecycle != TPACPI_LIFE_RUNNING)
5093 return;
5094
5095 printk(TPACPI_NOTICE "fan watchdog: enabling fan\n");
5096 rc = fan_set_enable();
5097 if (rc < 0) {
5098 printk(TPACPI_ERR "fan watchdog: error %d while enabling fan, "
5099 "will try again later...\n", -rc);
5100 /* reschedule for later */
5101 fan_watchdog_reset();
5102 }
5103 }
5104
5105 /*
5106 * SYSFS fan layout: hwmon compatible (device)
5107 *
5108 * pwm*_enable:
5109 * 0: "disengaged" mode
5110 * 1: manual mode
5111 * 2: native EC "auto" mode (recommended, hardware default)
5112 *
5113 * pwm*: set speed in manual mode, ignored otherwise.
5114 * 0 is level 0; 255 is level 7. Intermediate points done with linear
5115 * interpolation.
5116 *
5117 * fan*_input: tachometer reading, RPM
5118 *
5119 *
5120 * SYSFS fan layout: extensions
5121 *
5122 * fan_watchdog (driver):
5123 * fan watchdog interval in seconds, 0 disables (default), max 120
5124 */
5125
5126 /* sysfs fan pwm1_enable ----------------------------------------------- */
5127 static ssize_t fan_pwm1_enable_show(struct device *dev,
5128 struct device_attribute *attr,
5129 char *buf)
5130 {
5131 int res, mode;
5132 u8 status;
5133
5134 res = fan_get_status_safe(&status);
5135 if (res)
5136 return res;
5137
5138 if (unlikely(tp_features.fan_ctrl_status_undef)) {
5139 if (status != fan_control_initial_status) {
5140 tp_features.fan_ctrl_status_undef = 0;
5141 } else {
5142 /* Return most likely status. In fact, it
5143 * might be the only possible status */
5144 status = TP_EC_FAN_AUTO;
5145 }
5146 }
5147
5148 if (status & TP_EC_FAN_FULLSPEED) {
5149 mode = 0;
5150 } else if (status & TP_EC_FAN_AUTO) {
5151 mode = 2;
5152 } else
5153 mode = 1;
5154
5155 return snprintf(buf, PAGE_SIZE, "%d\n", mode);
5156 }
5157
5158 static ssize_t fan_pwm1_enable_store(struct device *dev,
5159 struct device_attribute *attr,
5160 const char *buf, size_t count)
5161 {
5162 unsigned long t;
5163 int res, level;
5164
5165 if (parse_strtoul(buf, 2, &t))
5166 return -EINVAL;
5167
5168 switch (t) {
5169 case 0:
5170 level = TP_EC_FAN_FULLSPEED;
5171 break;
5172 case 1:
5173 level = TPACPI_FAN_LAST_LEVEL;
5174 break;
5175 case 2:
5176 level = TP_EC_FAN_AUTO;
5177 break;
5178 case 3:
5179 /* reserved for software-controlled auto mode */
5180 return -ENOSYS;
5181 default:
5182 return -EINVAL;
5183 }
5184
5185 res = fan_set_level_safe(level);
5186 if (res == -ENXIO)
5187 return -EINVAL;
5188 else if (res < 0)
5189 return res;
5190
5191 fan_watchdog_reset();
5192
5193 return count;
5194 }
5195
5196 static struct device_attribute dev_attr_fan_pwm1_enable =
5197 __ATTR(pwm1_enable, S_IWUSR | S_IRUGO,
5198 fan_pwm1_enable_show, fan_pwm1_enable_store);
5199
5200 /* sysfs fan pwm1 ------------------------------------------------------ */
5201 static ssize_t fan_pwm1_show(struct device *dev,
5202 struct device_attribute *attr,
5203 char *buf)
5204 {
5205 int res;
5206 u8 status;
5207
5208 res = fan_get_status_safe(&status);
5209 if (res)
5210 return res;
5211
5212 if (unlikely(tp_features.fan_ctrl_status_undef)) {
5213 if (status != fan_control_initial_status) {
5214 tp_features.fan_ctrl_status_undef = 0;
5215 } else {
5216 status = TP_EC_FAN_AUTO;
5217 }
5218 }
5219
5220 if ((status &
5221 (TP_EC_FAN_AUTO | TP_EC_FAN_FULLSPEED)) != 0)
5222 status = fan_control_desired_level;
5223
5224 if (status > 7)
5225 status = 7;
5226
5227 return snprintf(buf, PAGE_SIZE, "%u\n", (status * 255) / 7);
5228 }
5229
5230 static ssize_t fan_pwm1_store(struct device *dev,
5231 struct device_attribute *attr,
5232 const char *buf, size_t count)
5233 {
5234 unsigned long s;
5235 int rc;
5236 u8 status, newlevel;
5237
5238 if (parse_strtoul(buf, 255, &s))
5239 return -EINVAL;
5240
5241 /* scale down from 0-255 to 0-7 */
5242 newlevel = (s >> 5) & 0x07;
5243
5244 if (mutex_lock_interruptible(&fan_mutex))
5245 return -ERESTARTSYS;
5246
5247 rc = fan_get_status(&status);
5248 if (!rc && (status &
5249 (TP_EC_FAN_AUTO | TP_EC_FAN_FULLSPEED)) == 0) {
5250 rc = fan_set_level(newlevel);
5251 if (rc == -ENXIO)
5252 rc = -EINVAL;
5253 else if (!rc) {
5254 fan_update_desired_level(newlevel);
5255 fan_watchdog_reset();
5256 }
5257 }
5258
5259 mutex_unlock(&fan_mutex);
5260 return (rc)? rc : count;
5261 }
5262
5263 static struct device_attribute dev_attr_fan_pwm1 =
5264 __ATTR(pwm1, S_IWUSR | S_IRUGO,
5265 fan_pwm1_show, fan_pwm1_store);
5266
5267 /* sysfs fan fan1_input ------------------------------------------------ */
5268 static ssize_t fan_fan1_input_show(struct device *dev,
5269 struct device_attribute *attr,
5270 char *buf)
5271 {
5272 int res;
5273 unsigned int speed;
5274
5275 res = fan_get_speed(&speed);
5276 if (res < 0)
5277 return res;
5278
5279 return snprintf(buf, PAGE_SIZE, "%u\n", speed);
5280 }
5281
5282 static struct device_attribute dev_attr_fan_fan1_input =
5283 __ATTR(fan1_input, S_IRUGO,
5284 fan_fan1_input_show, NULL);
5285
5286 /* sysfs fan fan_watchdog (hwmon driver) ------------------------------- */
5287 static ssize_t fan_fan_watchdog_show(struct device_driver *drv,
5288 char *buf)
5289 {
5290 return snprintf(buf, PAGE_SIZE, "%u\n", fan_watchdog_maxinterval);
5291 }
5292
5293 static ssize_t fan_fan_watchdog_store(struct device_driver *drv,
5294 const char *buf, size_t count)
5295 {
5296 unsigned long t;
5297
5298 if (parse_strtoul(buf, 120, &t))
5299 return -EINVAL;
5300
5301 if (!fan_control_allowed)
5302 return -EPERM;
5303
5304 fan_watchdog_maxinterval = t;
5305 fan_watchdog_reset();
5306
5307 return count;
5308 }
5309
5310 static DRIVER_ATTR(fan_watchdog, S_IWUSR | S_IRUGO,
5311 fan_fan_watchdog_show, fan_fan_watchdog_store);
5312
5313 /* --------------------------------------------------------------------- */
5314 static struct attribute *fan_attributes[] = {
5315 &dev_attr_fan_pwm1_enable.attr, &dev_attr_fan_pwm1.attr,
5316 &dev_attr_fan_fan1_input.attr,
5317 NULL
5318 };
5319
5320 static const struct attribute_group fan_attr_group = {
5321 .attrs = fan_attributes,
5322 };
5323
5324 static int __init fan_init(struct ibm_init_struct *iibm)
5325 {
5326 int rc;
5327
5328 vdbg_printk(TPACPI_DBG_INIT, "initializing fan subdriver\n");
5329
5330 mutex_init(&fan_mutex);
5331 fan_status_access_mode = TPACPI_FAN_NONE;
5332 fan_control_access_mode = TPACPI_FAN_WR_NONE;
5333 fan_control_commands = 0;
5334 fan_watchdog_maxinterval = 0;
5335 tp_features.fan_ctrl_status_undef = 0;
5336 fan_control_desired_level = 7;
5337
5338 TPACPI_ACPIHANDLE_INIT(fans);
5339 TPACPI_ACPIHANDLE_INIT(gfan);
5340 TPACPI_ACPIHANDLE_INIT(sfan);
5341
5342 if (gfan_handle) {
5343 /* 570, 600e/x, 770e, 770x */
5344 fan_status_access_mode = TPACPI_FAN_RD_ACPI_GFAN;
5345 } else {
5346 /* all other ThinkPads: note that even old-style
5347 * ThinkPad ECs supports the fan control register */
5348 if (likely(acpi_ec_read(fan_status_offset,
5349 &fan_control_initial_status))) {
5350 fan_status_access_mode = TPACPI_FAN_RD_TPEC;
5351
5352 /* In some ThinkPads, neither the EC nor the ACPI
5353 * DSDT initialize the fan status, and it ends up
5354 * being set to 0x07 when it *could* be either
5355 * 0x07 or 0x80.
5356 *
5357 * Enable for TP-1Y (T43), TP-78 (R51e),
5358 * TP-76 (R52), TP-70 (T43, R52), which are known
5359 * to be buggy. */
5360 if (fan_control_initial_status == 0x07) {
5361 switch (thinkpad_id.ec_model) {
5362 case 0x5931: /* TP-1Y */
5363 case 0x3837: /* TP-78 */
5364 case 0x3637: /* TP-76 */
5365 case 0x3037: /* TP-70 */
5366 printk(TPACPI_NOTICE
5367 "fan_init: initial fan status "
5368 "is unknown, assuming it is "
5369 "in auto mode\n");
5370 tp_features.fan_ctrl_status_undef = 1;
5371 ;;
5372 }
5373 }
5374 } else {
5375 printk(TPACPI_ERR
5376 "ThinkPad ACPI EC access misbehaving, "
5377 "fan status and control unavailable\n");
5378 return 1;
5379 }
5380 }
5381
5382 if (sfan_handle) {
5383 /* 570, 770x-JL */
5384 fan_control_access_mode = TPACPI_FAN_WR_ACPI_SFAN;
5385 fan_control_commands |=
5386 TPACPI_FAN_CMD_LEVEL | TPACPI_FAN_CMD_ENABLE;
5387 } else {
5388 if (!gfan_handle) {
5389 /* gfan without sfan means no fan control */
5390 /* all other models implement TP EC 0x2f control */
5391
5392 if (fans_handle) {
5393 /* X31, X40, X41 */
5394 fan_control_access_mode =
5395 TPACPI_FAN_WR_ACPI_FANS;
5396 fan_control_commands |=
5397 TPACPI_FAN_CMD_SPEED |
5398 TPACPI_FAN_CMD_LEVEL |
5399 TPACPI_FAN_CMD_ENABLE;
5400 } else {
5401 fan_control_access_mode = TPACPI_FAN_WR_TPEC;
5402 fan_control_commands |=
5403 TPACPI_FAN_CMD_LEVEL |
5404 TPACPI_FAN_CMD_ENABLE;
5405 }
5406 }
5407 }
5408
5409 vdbg_printk(TPACPI_DBG_INIT, "fan is %s, modes %d, %d\n",
5410 str_supported(fan_status_access_mode != TPACPI_FAN_NONE ||
5411 fan_control_access_mode != TPACPI_FAN_WR_NONE),
5412 fan_status_access_mode, fan_control_access_mode);
5413
5414 /* fan control master switch */
5415 if (!fan_control_allowed) {
5416 fan_control_access_mode = TPACPI_FAN_WR_NONE;
5417 fan_control_commands = 0;
5418 dbg_printk(TPACPI_DBG_INIT,
5419 "fan control features disabled by parameter\n");
5420 }
5421
5422 /* update fan_control_desired_level */
5423 if (fan_status_access_mode != TPACPI_FAN_NONE)
5424 fan_get_status_safe(NULL);
5425
5426 if (fan_status_access_mode != TPACPI_FAN_NONE ||
5427 fan_control_access_mode != TPACPI_FAN_WR_NONE) {
5428 rc = sysfs_create_group(&tpacpi_sensors_pdev->dev.kobj,
5429 &fan_attr_group);
5430 if (!(rc < 0))
5431 rc = driver_create_file(&tpacpi_hwmon_pdriver.driver,
5432 &driver_attr_fan_watchdog);
5433 if (rc < 0)
5434 return rc;
5435 return 0;
5436 } else
5437 return 1;
5438 }
5439
5440 static void fan_exit(void)
5441 {
5442 vdbg_printk(TPACPI_DBG_EXIT,
5443 "cancelling any pending fan watchdog tasks\n");
5444
5445 /* FIXME: can we really do this unconditionally? */
5446 sysfs_remove_group(&tpacpi_sensors_pdev->dev.kobj, &fan_attr_group);
5447 driver_remove_file(&tpacpi_hwmon_pdriver.driver,
5448 &driver_attr_fan_watchdog);
5449
5450 cancel_delayed_work(&fan_watchdog_task);
5451 flush_scheduled_work();
5452 }
5453
5454 static int fan_read(char *p)
5455 {
5456 int len = 0;
5457 int rc;
5458 u8 status;
5459 unsigned int speed = 0;
5460
5461 switch (fan_status_access_mode) {
5462 case TPACPI_FAN_RD_ACPI_GFAN:
5463 /* 570, 600e/x, 770e, 770x */
5464 rc = fan_get_status_safe(&status);
5465 if (rc < 0)
5466 return rc;
5467
5468 len += sprintf(p + len, "status:\t\t%s\n"
5469 "level:\t\t%d\n",
5470 (status != 0) ? "enabled" : "disabled", status);
5471 break;
5472
5473 case TPACPI_FAN_RD_TPEC:
5474 /* all except 570, 600e/x, 770e, 770x */
5475 rc = fan_get_status_safe(&status);
5476 if (rc < 0)
5477 return rc;
5478
5479 if (unlikely(tp_features.fan_ctrl_status_undef)) {
5480 if (status != fan_control_initial_status)
5481 tp_features.fan_ctrl_status_undef = 0;
5482 else
5483 /* Return most likely status. In fact, it
5484 * might be the only possible status */
5485 status = TP_EC_FAN_AUTO;
5486 }
5487
5488 len += sprintf(p + len, "status:\t\t%s\n",
5489 (status != 0) ? "enabled" : "disabled");
5490
5491 rc = fan_get_speed(&speed);
5492 if (rc < 0)
5493 return rc;
5494
5495 len += sprintf(p + len, "speed:\t\t%d\n", speed);
5496
5497 if (status & TP_EC_FAN_FULLSPEED)
5498 /* Disengaged mode takes precedence */
5499 len += sprintf(p + len, "level:\t\tdisengaged\n");
5500 else if (status & TP_EC_FAN_AUTO)
5501 len += sprintf(p + len, "level:\t\tauto\n");
5502 else
5503 len += sprintf(p + len, "level:\t\t%d\n", status);
5504 break;
5505
5506 case TPACPI_FAN_NONE:
5507 default:
5508 len += sprintf(p + len, "status:\t\tnot supported\n");
5509 }
5510
5511 if (fan_control_commands & TPACPI_FAN_CMD_LEVEL) {
5512 len += sprintf(p + len, "commands:\tlevel <level>");
5513
5514 switch (fan_control_access_mode) {
5515 case TPACPI_FAN_WR_ACPI_SFAN:
5516 len += sprintf(p + len, " (<level> is 0-7)\n");
5517 break;
5518
5519 default:
5520 len += sprintf(p + len, " (<level> is 0-7, "
5521 "auto, disengaged, full-speed)\n");
5522 break;
5523 }
5524 }
5525
5526 if (fan_control_commands & TPACPI_FAN_CMD_ENABLE)
5527 len += sprintf(p + len, "commands:\tenable, disable\n"
5528 "commands:\twatchdog <timeout> (<timeout> "
5529 "is 0 (off), 1-120 (seconds))\n");
5530
5531 if (fan_control_commands & TPACPI_FAN_CMD_SPEED)
5532 len += sprintf(p + len, "commands:\tspeed <speed>"
5533 " (<speed> is 0-65535)\n");
5534
5535 return len;
5536 }
5537
5538 static int fan_write_cmd_level(const char *cmd, int *rc)
5539 {
5540 int level;
5541
5542 if (strlencmp(cmd, "level auto") == 0)
5543 level = TP_EC_FAN_AUTO;
5544 else if ((strlencmp(cmd, "level disengaged") == 0) |
5545 (strlencmp(cmd, "level full-speed") == 0))
5546 level = TP_EC_FAN_FULLSPEED;
5547 else if (sscanf(cmd, "level %d", &level) != 1)
5548 return 0;
5549
5550 *rc = fan_set_level_safe(level);
5551 if (*rc == -ENXIO)
5552 printk(TPACPI_ERR "level command accepted for unsupported "
5553 "access mode %d", fan_control_access_mode);
5554
5555 return 1;
5556 }
5557
5558 static int fan_write_cmd_enable(const char *cmd, int *rc)
5559 {
5560 if (strlencmp(cmd, "enable") != 0)
5561 return 0;
5562
5563 *rc = fan_set_enable();
5564 if (*rc == -ENXIO)
5565 printk(TPACPI_ERR "enable command accepted for unsupported "
5566 "access mode %d", fan_control_access_mode);
5567
5568 return 1;
5569 }
5570
5571 static int fan_write_cmd_disable(const char *cmd, int *rc)
5572 {
5573 if (strlencmp(cmd, "disable") != 0)
5574 return 0;
5575
5576 *rc = fan_set_disable();
5577 if (*rc == -ENXIO)
5578 printk(TPACPI_ERR "disable command accepted for unsupported "
5579 "access mode %d", fan_control_access_mode);
5580
5581 return 1;
5582 }
5583
5584 static int fan_write_cmd_speed(const char *cmd, int *rc)
5585 {
5586 int speed;
5587
5588 /* TODO:
5589 * Support speed <low> <medium> <high> ? */
5590
5591 if (sscanf(cmd, "speed %d", &speed) != 1)
5592 return 0;
5593
5594 *rc = fan_set_speed(speed);
5595 if (*rc == -ENXIO)
5596 printk(TPACPI_ERR "speed command accepted for unsupported "
5597 "access mode %d", fan_control_access_mode);
5598
5599 return 1;
5600 }
5601
5602 static int fan_write_cmd_watchdog(const char *cmd, int *rc)
5603 {
5604 int interval;
5605
5606 if (sscanf(cmd, "watchdog %d", &interval) != 1)
5607 return 0;
5608
5609 if (interval < 0 || interval > 120)
5610 *rc = -EINVAL;
5611 else
5612 fan_watchdog_maxinterval = interval;
5613
5614 return 1;
5615 }
5616
5617 static int fan_write(char *buf)
5618 {
5619 char *cmd;
5620 int rc = 0;
5621
5622 while (!rc && (cmd = next_cmd(&buf))) {
5623 if (!((fan_control_commands & TPACPI_FAN_CMD_LEVEL) &&
5624 fan_write_cmd_level(cmd, &rc)) &&
5625 !((fan_control_commands & TPACPI_FAN_CMD_ENABLE) &&
5626 (fan_write_cmd_enable(cmd, &rc) ||
5627 fan_write_cmd_disable(cmd, &rc) ||
5628 fan_write_cmd_watchdog(cmd, &rc))) &&
5629 !((fan_control_commands & TPACPI_FAN_CMD_SPEED) &&
5630 fan_write_cmd_speed(cmd, &rc))
5631 )
5632 rc = -EINVAL;
5633 else if (!rc)
5634 fan_watchdog_reset();
5635 }
5636
5637 return rc;
5638 }
5639
5640 static struct ibm_struct fan_driver_data = {
5641 .name = "fan",
5642 .read = fan_read,
5643 .write = fan_write,
5644 .exit = fan_exit,
5645 };
5646
5647 /****************************************************************************
5648 ****************************************************************************
5649 *
5650 * Infrastructure
5651 *
5652 ****************************************************************************
5653 ****************************************************************************/
5654
5655 /* sysfs name ---------------------------------------------------------- */
5656 static ssize_t thinkpad_acpi_pdev_name_show(struct device *dev,
5657 struct device_attribute *attr,
5658 char *buf)
5659 {
5660 return snprintf(buf, PAGE_SIZE, "%s\n", TPACPI_NAME);
5661 }
5662
5663 static struct device_attribute dev_attr_thinkpad_acpi_pdev_name =
5664 __ATTR(name, S_IRUGO, thinkpad_acpi_pdev_name_show, NULL);
5665
5666 /* --------------------------------------------------------------------- */
5667
5668 /* /proc support */
5669 static struct proc_dir_entry *proc_dir;
5670
5671 /*
5672 * Module and infrastructure proble, init and exit handling
5673 */
5674
5675 static int force_load;
5676
5677 #ifdef CONFIG_THINKPAD_ACPI_DEBUG
5678 static const char * __init str_supported(int is_supported)
5679 {
5680 static char text_unsupported[] __initdata = "not supported";
5681
5682 return (is_supported)? &text_unsupported[4] : &text_unsupported[0];
5683 }
5684 #endif /* CONFIG_THINKPAD_ACPI_DEBUG */
5685
5686 static void ibm_exit(struct ibm_struct *ibm)
5687 {
5688 dbg_printk(TPACPI_DBG_EXIT, "removing %s\n", ibm->name);
5689
5690 list_del_init(&ibm->all_drivers);
5691
5692 if (ibm->flags.acpi_notify_installed) {
5693 dbg_printk(TPACPI_DBG_EXIT,
5694 "%s: acpi_remove_notify_handler\n", ibm->name);
5695 BUG_ON(!ibm->acpi);
5696 acpi_remove_notify_handler(*ibm->acpi->handle,
5697 ibm->acpi->type,
5698 dispatch_acpi_notify);
5699 ibm->flags.acpi_notify_installed = 0;
5700 ibm->flags.acpi_notify_installed = 0;
5701 }
5702
5703 if (ibm->flags.proc_created) {
5704 dbg_printk(TPACPI_DBG_EXIT,
5705 "%s: remove_proc_entry\n", ibm->name);
5706 remove_proc_entry(ibm->name, proc_dir);
5707 ibm->flags.proc_created = 0;
5708 }
5709
5710 if (ibm->flags.acpi_driver_registered) {
5711 dbg_printk(TPACPI_DBG_EXIT,
5712 "%s: acpi_bus_unregister_driver\n", ibm->name);
5713 BUG_ON(!ibm->acpi);
5714 acpi_bus_unregister_driver(ibm->acpi->driver);
5715 kfree(ibm->acpi->driver);
5716 ibm->acpi->driver = NULL;
5717 ibm->flags.acpi_driver_registered = 0;
5718 }
5719
5720 if (ibm->flags.init_called && ibm->exit) {
5721 ibm->exit();
5722 ibm->flags.init_called = 0;
5723 }
5724
5725 dbg_printk(TPACPI_DBG_INIT, "finished removing %s\n", ibm->name);
5726 }
5727
5728 static int __init ibm_init(struct ibm_init_struct *iibm)
5729 {
5730 int ret;
5731 struct ibm_struct *ibm = iibm->data;
5732 struct proc_dir_entry *entry;
5733
5734 BUG_ON(ibm == NULL);
5735
5736 INIT_LIST_HEAD(&ibm->all_drivers);
5737
5738 if (ibm->flags.experimental && !experimental)
5739 return 0;
5740
5741 dbg_printk(TPACPI_DBG_INIT,
5742 "probing for %s\n", ibm->name);
5743
5744 if (iibm->init) {
5745 ret = iibm->init(iibm);
5746 if (ret > 0)
5747 return 0; /* probe failed */
5748 if (ret)
5749 return ret;
5750
5751 ibm->flags.init_called = 1;
5752 }
5753
5754 if (ibm->acpi) {
5755 if (ibm->acpi->hid) {
5756 ret = register_tpacpi_subdriver(ibm);
5757 if (ret)
5758 goto err_out;
5759 }
5760
5761 if (ibm->acpi->notify) {
5762 ret = setup_acpi_notify(ibm);
5763 if (ret == -ENODEV) {
5764 printk(TPACPI_NOTICE "disabling subdriver %s\n",
5765 ibm->name);
5766 ret = 0;
5767 goto err_out;
5768 }
5769 if (ret < 0)
5770 goto err_out;
5771 }
5772 }
5773
5774 dbg_printk(TPACPI_DBG_INIT,
5775 "%s installed\n", ibm->name);
5776
5777 if (ibm->read) {
5778 entry = create_proc_entry(ibm->name,
5779 S_IFREG | S_IRUGO | S_IWUSR,
5780 proc_dir);
5781 if (!entry) {
5782 printk(TPACPI_ERR "unable to create proc entry %s\n",
5783 ibm->name);
5784 ret = -ENODEV;
5785 goto err_out;
5786 }
5787 entry->owner = THIS_MODULE;
5788 entry->data = ibm;
5789 entry->read_proc = &dispatch_procfs_read;
5790 if (ibm->write)
5791 entry->write_proc = &dispatch_procfs_write;
5792 ibm->flags.proc_created = 1;
5793 }
5794
5795 list_add_tail(&ibm->all_drivers, &tpacpi_all_drivers);
5796
5797 return 0;
5798
5799 err_out:
5800 dbg_printk(TPACPI_DBG_INIT,
5801 "%s: at error exit path with result %d\n",
5802 ibm->name, ret);
5803
5804 ibm_exit(ibm);
5805 return (ret < 0)? ret : 0;
5806 }
5807
5808 /* Probing */
5809
5810 static void __init get_thinkpad_model_data(struct thinkpad_id_data *tp)
5811 {
5812 const struct dmi_device *dev = NULL;
5813 char ec_fw_string[18];
5814
5815 if (!tp)
5816 return;
5817
5818 memset(tp, 0, sizeof(*tp));
5819
5820 if (dmi_name_in_vendors("IBM"))
5821 tp->vendor = PCI_VENDOR_ID_IBM;
5822 else if (dmi_name_in_vendors("LENOVO"))
5823 tp->vendor = PCI_VENDOR_ID_LENOVO;
5824 else
5825 return;
5826
5827 tp->bios_version_str = kstrdup(dmi_get_system_info(DMI_BIOS_VERSION),
5828 GFP_KERNEL);
5829 if (!tp->bios_version_str)
5830 return;
5831 tp->bios_model = tp->bios_version_str[0]
5832 | (tp->bios_version_str[1] << 8);
5833
5834 /*
5835 * ThinkPad T23 or newer, A31 or newer, R50e or newer,
5836 * X32 or newer, all Z series; Some models must have an
5837 * up-to-date BIOS or they will not be detected.
5838 *
5839 * See http://thinkwiki.org/wiki/List_of_DMI_IDs
5840 */
5841 while ((dev = dmi_find_device(DMI_DEV_TYPE_OEM_STRING, NULL, dev))) {
5842 if (sscanf(dev->name,
5843 "IBM ThinkPad Embedded Controller -[%17c",
5844 ec_fw_string) == 1) {
5845 ec_fw_string[sizeof(ec_fw_string) - 1] = 0;
5846 ec_fw_string[strcspn(ec_fw_string, " ]")] = 0;
5847
5848 tp->ec_version_str = kstrdup(ec_fw_string, GFP_KERNEL);
5849 tp->ec_model = ec_fw_string[0]
5850 | (ec_fw_string[1] << 8);
5851 break;
5852 }
5853 }
5854
5855 tp->model_str = kstrdup(dmi_get_system_info(DMI_PRODUCT_VERSION),
5856 GFP_KERNEL);
5857 if (strnicmp(tp->model_str, "ThinkPad", 8) != 0) {
5858 kfree(tp->model_str);
5859 tp->model_str = NULL;
5860 }
5861 }
5862
5863 static int __init probe_for_thinkpad(void)
5864 {
5865 int is_thinkpad;
5866
5867 if (acpi_disabled)
5868 return -ENODEV;
5869
5870 /*
5871 * Non-ancient models have better DMI tagging, but very old models
5872 * don't.
5873 */
5874 is_thinkpad = (thinkpad_id.model_str != NULL);
5875
5876 /* ec is required because many other handles are relative to it */
5877 TPACPI_ACPIHANDLE_INIT(ec);
5878 if (!ec_handle) {
5879 if (is_thinkpad)
5880 printk(TPACPI_ERR
5881 "Not yet supported ThinkPad detected!\n");
5882 return -ENODEV;
5883 }
5884
5885 /*
5886 * Risks a regression on very old machines, but reduces potential
5887 * false positives a damn great deal
5888 */
5889 if (!is_thinkpad)
5890 is_thinkpad = (thinkpad_id.vendor == PCI_VENDOR_ID_IBM);
5891
5892 if (!is_thinkpad && !force_load)
5893 return -ENODEV;
5894
5895 return 0;
5896 }
5897
5898
5899 /* Module init, exit, parameters */
5900
5901 static struct ibm_init_struct ibms_init[] __initdata = {
5902 {
5903 .init = thinkpad_acpi_driver_init,
5904 .data = &thinkpad_acpi_driver_data,
5905 },
5906 {
5907 .init = hotkey_init,
5908 .data = &hotkey_driver_data,
5909 },
5910 {
5911 .init = bluetooth_init,
5912 .data = &bluetooth_driver_data,
5913 },
5914 {
5915 .init = wan_init,
5916 .data = &wan_driver_data,
5917 },
5918 #ifdef CONFIG_THINKPAD_ACPI_VIDEO
5919 {
5920 .init = video_init,
5921 .data = &video_driver_data,
5922 },
5923 #endif
5924 {
5925 .init = light_init,
5926 .data = &light_driver_data,
5927 },
5928 #ifdef CONFIG_THINKPAD_ACPI_DOCK
5929 {
5930 .init = dock_init,
5931 .data = &dock_driver_data[0],
5932 },
5933 {
5934 .init = dock_init2,
5935 .data = &dock_driver_data[1],
5936 },
5937 #endif
5938 #ifdef CONFIG_THINKPAD_ACPI_BAY
5939 {
5940 .init = bay_init,
5941 .data = &bay_driver_data,
5942 },
5943 #endif
5944 {
5945 .init = cmos_init,
5946 .data = &cmos_driver_data,
5947 },
5948 {
5949 .init = led_init,
5950 .data = &led_driver_data,
5951 },
5952 {
5953 .init = beep_init,
5954 .data = &beep_driver_data,
5955 },
5956 {
5957 .init = thermal_init,
5958 .data = &thermal_driver_data,
5959 },
5960 {
5961 .data = &ecdump_driver_data,
5962 },
5963 {
5964 .init = brightness_init,
5965 .data = &brightness_driver_data,
5966 },
5967 {
5968 .data = &volume_driver_data,
5969 },
5970 {
5971 .init = fan_init,
5972 .data = &fan_driver_data,
5973 },
5974 };
5975
5976 static int __init set_ibm_param(const char *val, struct kernel_param *kp)
5977 {
5978 unsigned int i;
5979 struct ibm_struct *ibm;
5980
5981 if (!kp || !kp->name || !val)
5982 return -EINVAL;
5983
5984 for (i = 0; i < ARRAY_SIZE(ibms_init); i++) {
5985 ibm = ibms_init[i].data;
5986 WARN_ON(ibm == NULL);
5987
5988 if (!ibm || !ibm->name)
5989 continue;
5990
5991 if (strcmp(ibm->name, kp->name) == 0 && ibm->write) {
5992 if (strlen(val) > sizeof(ibms_init[i].param) - 2)
5993 return -ENOSPC;
5994 strcpy(ibms_init[i].param, val);
5995 strcat(ibms_init[i].param, ",");
5996 return 0;
5997 }
5998 }
5999
6000 return -EINVAL;
6001 }
6002
6003 module_param(experimental, int, 0);
6004 MODULE_PARM_DESC(experimental,
6005 "Enables experimental features when non-zero");
6006
6007 module_param_named(debug, dbg_level, uint, 0);
6008 MODULE_PARM_DESC(debug, "Sets debug level bit-mask");
6009
6010 module_param(force_load, bool, 0);
6011 MODULE_PARM_DESC(force_load,
6012 "Attempts to load the driver even on a "
6013 "mis-identified ThinkPad when true");
6014
6015 module_param_named(fan_control, fan_control_allowed, bool, 0);
6016 MODULE_PARM_DESC(fan_control,
6017 "Enables setting fan parameters features when true");
6018
6019 module_param_named(brightness_mode, brightness_mode, int, 0);
6020 MODULE_PARM_DESC(brightness_mode,
6021 "Selects brightness control strategy: "
6022 "0=auto, 1=EC, 2=CMOS, 3=both");
6023
6024 module_param(brightness_enable, uint, 0);
6025 MODULE_PARM_DESC(brightness_enable,
6026 "Enables backlight control when 1, disables when 0");
6027
6028 module_param(hotkey_report_mode, uint, 0);
6029 MODULE_PARM_DESC(hotkey_report_mode,
6030 "used for backwards compatibility with userspace, "
6031 "see documentation");
6032
6033 #define TPACPI_PARAM(feature) \
6034 module_param_call(feature, set_ibm_param, NULL, NULL, 0); \
6035 MODULE_PARM_DESC(feature, "Simulates thinkpad-acpi procfs command " \
6036 "at module load, see documentation")
6037
6038 TPACPI_PARAM(hotkey);
6039 TPACPI_PARAM(bluetooth);
6040 TPACPI_PARAM(video);
6041 TPACPI_PARAM(light);
6042 #ifdef CONFIG_THINKPAD_ACPI_DOCK
6043 TPACPI_PARAM(dock);
6044 #endif
6045 #ifdef CONFIG_THINKPAD_ACPI_BAY
6046 TPACPI_PARAM(bay);
6047 #endif /* CONFIG_THINKPAD_ACPI_BAY */
6048 TPACPI_PARAM(cmos);
6049 TPACPI_PARAM(led);
6050 TPACPI_PARAM(beep);
6051 TPACPI_PARAM(ecdump);
6052 TPACPI_PARAM(brightness);
6053 TPACPI_PARAM(volume);
6054 TPACPI_PARAM(fan);
6055
6056 static void thinkpad_acpi_module_exit(void)
6057 {
6058 struct ibm_struct *ibm, *itmp;
6059
6060 tpacpi_lifecycle = TPACPI_LIFE_EXITING;
6061
6062 list_for_each_entry_safe_reverse(ibm, itmp,
6063 &tpacpi_all_drivers,
6064 all_drivers) {
6065 ibm_exit(ibm);
6066 }
6067
6068 dbg_printk(TPACPI_DBG_INIT, "finished subdriver exit path...\n");
6069
6070 if (tpacpi_inputdev) {
6071 if (tp_features.input_device_registered)
6072 input_unregister_device(tpacpi_inputdev);
6073 else
6074 input_free_device(tpacpi_inputdev);
6075 }
6076
6077 if (tpacpi_hwmon)
6078 hwmon_device_unregister(tpacpi_hwmon);
6079
6080 if (tp_features.sensors_pdev_attrs_registered)
6081 device_remove_file(&tpacpi_sensors_pdev->dev,
6082 &dev_attr_thinkpad_acpi_pdev_name);
6083 if (tpacpi_sensors_pdev)
6084 platform_device_unregister(tpacpi_sensors_pdev);
6085 if (tpacpi_pdev)
6086 platform_device_unregister(tpacpi_pdev);
6087
6088 if (tp_features.sensors_pdrv_attrs_registered)
6089 tpacpi_remove_driver_attributes(&tpacpi_hwmon_pdriver.driver);
6090 if (tp_features.platform_drv_attrs_registered)
6091 tpacpi_remove_driver_attributes(&tpacpi_pdriver.driver);
6092
6093 if (tp_features.sensors_pdrv_registered)
6094 platform_driver_unregister(&tpacpi_hwmon_pdriver);
6095
6096 if (tp_features.platform_drv_registered)
6097 platform_driver_unregister(&tpacpi_pdriver);
6098
6099 if (proc_dir)
6100 remove_proc_entry(TPACPI_PROC_DIR, acpi_root_dir);
6101
6102 kfree(thinkpad_id.bios_version_str);
6103 kfree(thinkpad_id.ec_version_str);
6104 kfree(thinkpad_id.model_str);
6105 }
6106
6107
6108 static int __init thinkpad_acpi_module_init(void)
6109 {
6110 int ret, i;
6111
6112 tpacpi_lifecycle = TPACPI_LIFE_INIT;
6113
6114 /* Parameter checking */
6115 if (hotkey_report_mode > 2)
6116 return -EINVAL;
6117
6118 /* Driver-level probe */
6119
6120 get_thinkpad_model_data(&thinkpad_id);
6121 ret = probe_for_thinkpad();
6122 if (ret) {
6123 thinkpad_acpi_module_exit();
6124 return ret;
6125 }
6126
6127 /* Driver initialization */
6128
6129 TPACPI_ACPIHANDLE_INIT(ecrd);
6130 TPACPI_ACPIHANDLE_INIT(ecwr);
6131
6132 proc_dir = proc_mkdir(TPACPI_PROC_DIR, acpi_root_dir);
6133 if (!proc_dir) {
6134 printk(TPACPI_ERR
6135 "unable to create proc dir " TPACPI_PROC_DIR);
6136 thinkpad_acpi_module_exit();
6137 return -ENODEV;
6138 }
6139 proc_dir->owner = THIS_MODULE;
6140
6141 ret = platform_driver_register(&tpacpi_pdriver);
6142 if (ret) {
6143 printk(TPACPI_ERR
6144 "unable to register main platform driver\n");
6145 thinkpad_acpi_module_exit();
6146 return ret;
6147 }
6148 tp_features.platform_drv_registered = 1;
6149
6150 ret = platform_driver_register(&tpacpi_hwmon_pdriver);
6151 if (ret) {
6152 printk(TPACPI_ERR
6153 "unable to register hwmon platform driver\n");
6154 thinkpad_acpi_module_exit();
6155 return ret;
6156 }
6157 tp_features.sensors_pdrv_registered = 1;
6158
6159 ret = tpacpi_create_driver_attributes(&tpacpi_pdriver.driver);
6160 if (!ret) {
6161 tp_features.platform_drv_attrs_registered = 1;
6162 ret = tpacpi_create_driver_attributes(
6163 &tpacpi_hwmon_pdriver.driver);
6164 }
6165 if (ret) {
6166 printk(TPACPI_ERR
6167 "unable to create sysfs driver attributes\n");
6168 thinkpad_acpi_module_exit();
6169 return ret;
6170 }
6171 tp_features.sensors_pdrv_attrs_registered = 1;
6172
6173
6174 /* Device initialization */
6175 tpacpi_pdev = platform_device_register_simple(TPACPI_DRVR_NAME, -1,
6176 NULL, 0);
6177 if (IS_ERR(tpacpi_pdev)) {
6178 ret = PTR_ERR(tpacpi_pdev);
6179 tpacpi_pdev = NULL;
6180 printk(TPACPI_ERR "unable to register platform device\n");
6181 thinkpad_acpi_module_exit();
6182 return ret;
6183 }
6184 tpacpi_sensors_pdev = platform_device_register_simple(
6185 TPACPI_HWMON_DRVR_NAME,
6186 -1, NULL, 0);
6187 if (IS_ERR(tpacpi_sensors_pdev)) {
6188 ret = PTR_ERR(tpacpi_sensors_pdev);
6189 tpacpi_sensors_pdev = NULL;
6190 printk(TPACPI_ERR
6191 "unable to register hwmon platform device\n");
6192 thinkpad_acpi_module_exit();
6193 return ret;
6194 }
6195 ret = device_create_file(&tpacpi_sensors_pdev->dev,
6196 &dev_attr_thinkpad_acpi_pdev_name);
6197 if (ret) {
6198 printk(TPACPI_ERR
6199 "unable to create sysfs hwmon device attributes\n");
6200 thinkpad_acpi_module_exit();
6201 return ret;
6202 }
6203 tp_features.sensors_pdev_attrs_registered = 1;
6204 tpacpi_hwmon = hwmon_device_register(&tpacpi_sensors_pdev->dev);
6205 if (IS_ERR(tpacpi_hwmon)) {
6206 ret = PTR_ERR(tpacpi_hwmon);
6207 tpacpi_hwmon = NULL;
6208 printk(TPACPI_ERR "unable to register hwmon device\n");
6209 thinkpad_acpi_module_exit();
6210 return ret;
6211 }
6212 mutex_init(&tpacpi_inputdev_send_mutex);
6213 tpacpi_inputdev = input_allocate_device();
6214 if (!tpacpi_inputdev) {
6215 printk(TPACPI_ERR "unable to allocate input device\n");
6216 thinkpad_acpi_module_exit();
6217 return -ENOMEM;
6218 } else {
6219 /* Prepare input device, but don't register */
6220 tpacpi_inputdev->name = "ThinkPad Extra Buttons";
6221 tpacpi_inputdev->phys = TPACPI_DRVR_NAME "/input0";
6222 tpacpi_inputdev->id.bustype = BUS_HOST;
6223 tpacpi_inputdev->id.vendor = (thinkpad_id.vendor) ?
6224 thinkpad_id.vendor :
6225 PCI_VENDOR_ID_IBM;
6226 tpacpi_inputdev->id.product = TPACPI_HKEY_INPUT_PRODUCT;
6227 tpacpi_inputdev->id.version = TPACPI_HKEY_INPUT_VERSION;
6228 }
6229 for (i = 0; i < ARRAY_SIZE(ibms_init); i++) {
6230 ret = ibm_init(&ibms_init[i]);
6231 if (ret >= 0 && *ibms_init[i].param)
6232 ret = ibms_init[i].data->write(ibms_init[i].param);
6233 if (ret < 0) {
6234 thinkpad_acpi_module_exit();
6235 return ret;
6236 }
6237 }
6238 ret = input_register_device(tpacpi_inputdev);
6239 if (ret < 0) {
6240 printk(TPACPI_ERR "unable to register input device\n");
6241 thinkpad_acpi_module_exit();
6242 return ret;
6243 } else {
6244 tp_features.input_device_registered = 1;
6245 }
6246
6247 tpacpi_lifecycle = TPACPI_LIFE_RUNNING;
6248 return 0;
6249 }
6250
6251 /* Please remove this in year 2009 */
6252 MODULE_ALIAS("ibm_acpi");
6253
6254 /*
6255 * DMI matching for module autoloading
6256 *
6257 * See http://thinkwiki.org/wiki/List_of_DMI_IDs
6258 * See http://thinkwiki.org/wiki/BIOS_Upgrade_Downloads
6259 *
6260 * Only models listed in thinkwiki will be supported, so add yours
6261 * if it is not there yet.
6262 */
6263 #define IBM_BIOS_MODULE_ALIAS(__type) \
6264 MODULE_ALIAS("dmi:bvnIBM:bvr" __type "ET??WW")
6265
6266 /* Non-ancient thinkpads */
6267 MODULE_ALIAS("dmi:bvnIBM:*:svnIBM:*:pvrThinkPad*:rvnIBM:*");
6268 MODULE_ALIAS("dmi:bvnLENOVO:*:svnLENOVO:*:pvrThinkPad*:rvnLENOVO:*");
6269
6270 /* Ancient thinkpad BIOSes have to be identified by
6271 * BIOS type or model number, and there are far less
6272 * BIOS types than model numbers... */
6273 IBM_BIOS_MODULE_ALIAS("I[B,D,H,I,M,N,O,T,W,V,Y,Z]");
6274 IBM_BIOS_MODULE_ALIAS("1[0,3,6,8,A-G,I,K,M-P,S,T]");
6275 IBM_BIOS_MODULE_ALIAS("K[U,X-Z]");
6276
6277 MODULE_AUTHOR("Borislav Deianov, Henrique de Moraes Holschuh");
6278 MODULE_DESCRIPTION(TPACPI_DESC);
6279 MODULE_VERSION(TPACPI_VERSION);
6280 MODULE_LICENSE("GPL");
6281
6282 module_init(thinkpad_acpi_module_init);
6283 module_exit(thinkpad_acpi_module_exit);
Linux 2.6 ibm-acpi/thinkpad-acpi driver git tree