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ACPI: thinkpad-acpi: prepare for bluetooth and wwan rfkill support
[linux-2.6/linux-acpi-2.6/ibm-acpi-2.6.git] / drivers / misc / thinkpad_acpi.c
blobafc9bf030712d1c215992232c130261cc0ea2ce6
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 "0.20"
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 <linux/leds.h>
71 #include <asm/uaccess.h>
72
73 #include <linux/dmi.h>
74 #include <linux/jiffies.h>
75 #include <linux/workqueue.h>
76
77 #include <acpi/acpi_drivers.h>
78 #include <acpi/acnamesp.h>
79
80 #include <linux/pci_ids.h>
81
82
83 /* ThinkPad CMOS commands */
84 #define TP_CMOS_VOLUME_DOWN 0
85 #define TP_CMOS_VOLUME_UP 1
86 #define TP_CMOS_VOLUME_MUTE 2
87 #define TP_CMOS_BRIGHTNESS_UP 4
88 #define TP_CMOS_BRIGHTNESS_DOWN 5
89 #define TP_CMOS_THINKLIGHT_ON 12
90 #define TP_CMOS_THINKLIGHT_OFF 13
91
92 /* NVRAM Addresses */
93 enum tp_nvram_addr {
94 TP_NVRAM_ADDR_HK2 = 0x57,
95 TP_NVRAM_ADDR_THINKLIGHT = 0x58,
96 TP_NVRAM_ADDR_VIDEO = 0x59,
97 TP_NVRAM_ADDR_BRIGHTNESS = 0x5e,
98 TP_NVRAM_ADDR_MIXER = 0x60,
99 };
100
101 /* NVRAM bit masks */
102 enum {
103 TP_NVRAM_MASK_HKT_THINKPAD = 0x08,
104 TP_NVRAM_MASK_HKT_ZOOM = 0x20,
105 TP_NVRAM_MASK_HKT_DISPLAY = 0x40,
106 TP_NVRAM_MASK_HKT_HIBERNATE = 0x80,
107 TP_NVRAM_MASK_THINKLIGHT = 0x10,
108 TP_NVRAM_MASK_HKT_DISPEXPND = 0x30,
109 TP_NVRAM_MASK_HKT_BRIGHTNESS = 0x20,
110 TP_NVRAM_MASK_LEVEL_BRIGHTNESS = 0x0f,
111 TP_NVRAM_POS_LEVEL_BRIGHTNESS = 0,
112 TP_NVRAM_MASK_MUTE = 0x40,
113 TP_NVRAM_MASK_HKT_VOLUME = 0x80,
114 TP_NVRAM_MASK_LEVEL_VOLUME = 0x0f,
115 TP_NVRAM_POS_LEVEL_VOLUME = 0,
116 };
117
118 /* ACPI HIDs */
119 #define TPACPI_ACPI_HKEY_HID "IBM0068"
120
121 /* Input IDs */
122 #define TPACPI_HKEY_INPUT_PRODUCT 0x5054 /* "TP" */
123 #define TPACPI_HKEY_INPUT_VERSION 0x4101
124
125
126 /****************************************************************************
127 * Main driver
128 */
129
130 #define TPACPI_NAME "thinkpad"
131 #define TPACPI_DESC "ThinkPad ACPI Extras"
132 #define TPACPI_FILE TPACPI_NAME "_acpi"
133 #define TPACPI_URL "http://ibm-acpi.sf.net/"
134 #define TPACPI_MAIL "ibm-acpi-devel@lists.sourceforge.net"
135
136 #define TPACPI_PROC_DIR "ibm"
137 #define TPACPI_ACPI_EVENT_PREFIX "ibm"
138 #define TPACPI_DRVR_NAME TPACPI_FILE
139 #define TPACPI_DRVR_SHORTNAME "tpacpi"
140 #define TPACPI_HWMON_DRVR_NAME TPACPI_NAME "_hwmon"
141
142 #define TPACPI_NVRAM_KTHREAD_NAME "ktpacpi_nvramd"
143 #define TPACPI_WORKQUEUE_NAME "ktpacpid"
144
145 #define TPACPI_MAX_ACPI_ARGS 3
146
147 /* Debugging */
148 #define TPACPI_LOG TPACPI_FILE ": "
149 #define TPACPI_ERR KERN_ERR TPACPI_LOG
150 #define TPACPI_NOTICE KERN_NOTICE TPACPI_LOG
151 #define TPACPI_INFO KERN_INFO TPACPI_LOG
152 #define TPACPI_DEBUG KERN_DEBUG TPACPI_LOG
153
154 #define TPACPI_DBG_ALL 0xffff
155 #define TPACPI_DBG_ALL 0xffff
156 #define TPACPI_DBG_INIT 0x0001
157 #define TPACPI_DBG_EXIT 0x0002
158 #define dbg_printk(a_dbg_level, format, arg...) \
159 do { if (dbg_level & a_dbg_level) \
160 printk(TPACPI_DEBUG "%s: " format, __func__ , ## arg); \
161 } while (0)
162 #ifdef CONFIG_THINKPAD_ACPI_DEBUG
163 #define vdbg_printk(a_dbg_level, format, arg...) \
164 dbg_printk(a_dbg_level, format, ## arg)
165 static const char *str_supported(int is_supported);
166 #else
167 #define vdbg_printk(a_dbg_level, format, arg...)
168 #endif
169
170 #define onoff(status, bit) ((status) & (1 << (bit)) ? "on" : "off")
171 #define enabled(status, bit) ((status) & (1 << (bit)) ? "enabled" : "disabled")
172 #define strlencmp(a, b) (strncmp((a), (b), strlen(b)))
173
174
175 /****************************************************************************
176 * Driver-wide structs and misc. variables
177 */
178
179 struct ibm_struct;
180
181 struct tp_acpi_drv_struct {
182 const struct acpi_device_id *hid;
183 struct acpi_driver *driver;
184
185 void (*notify) (struct ibm_struct *, u32);
186 acpi_handle *handle;
187 u32 type;
188 struct acpi_device *device;
189 };
190
191 struct ibm_struct {
192 char *name;
193
194 int (*read) (char *);
195 int (*write) (char *);
196 void (*exit) (void);
197 void (*resume) (void);
198 void (*suspend) (pm_message_t state);
199
200 struct list_head all_drivers;
201
202 struct tp_acpi_drv_struct *acpi;
203
204 struct {
205 u8 acpi_driver_registered:1;
206 u8 acpi_notify_installed:1;
207 u8 proc_created:1;
208 u8 init_called:1;
209 u8 experimental:1;
210 } flags;
211 };
212
213 struct ibm_init_struct {
214 char param[32];
215
216 int (*init) (struct ibm_init_struct *);
217 struct ibm_struct *data;
218 };
219
220 static struct {
221 #ifdef CONFIG_THINKPAD_ACPI_BAY
222 u32 bay_status:1;
223 u32 bay_eject:1;
224 u32 bay_status2:1;
225 u32 bay_eject2:1;
226 #endif
227 u32 bluetooth:1;
228 u32 hotkey:1;
229 u32 hotkey_mask:1;
230 u32 hotkey_wlsw:1;
231 u32 hotkey_tablet:1;
232 u32 light:1;
233 u32 light_status:1;
234 u32 bright_16levels:1;
235 u32 bright_acpimode:1;
236 u32 wan:1;
237 u32 fan_ctrl_status_undef:1;
238 u32 input_device_registered:1;
239 u32 platform_drv_registered:1;
240 u32 platform_drv_attrs_registered:1;
241 u32 sensors_pdrv_registered:1;
242 u32 sensors_pdrv_attrs_registered:1;
243 u32 sensors_pdev_attrs_registered:1;
244 u32 hotkey_poll_active:1;
245 } tp_features;
246
247 static struct {
248 u16 hotkey_mask_ff:1;
249 u16 bright_cmos_ec_unsync:1;
250 } tp_warned;
251
252 struct thinkpad_id_data {
253 unsigned int vendor; /* ThinkPad vendor:
254 * PCI_VENDOR_ID_IBM/PCI_VENDOR_ID_LENOVO */
255
256 char *bios_version_str; /* Something like 1ZET51WW (1.03z) */
257 char *ec_version_str; /* Something like 1ZHT51WW-1.04a */
258
259 u16 bios_model; /* Big Endian, TP-1Y = 0x5931, 0 = unknown */
260 u16 ec_model;
261
262 char *model_str; /* ThinkPad T43 */
263 char *nummodel_str; /* 9384A9C for a 9384-A9C model */
264 };
265 static struct thinkpad_id_data thinkpad_id;
266
267 static enum {
268 TPACPI_LIFE_INIT = 0,
269 TPACPI_LIFE_RUNNING,
270 TPACPI_LIFE_EXITING,
271 } tpacpi_lifecycle;
272
273 static int experimental;
274 static u32 dbg_level;
275
276 static struct workqueue_struct *tpacpi_wq;
277
278 /* Special LED class that can defer work */
279 struct tpacpi_led_classdev {
280 struct led_classdev led_classdev;
281 struct work_struct work;
282 enum led_brightness new_brightness;
283 unsigned int led;
284 };
285
286 /****************************************************************************
287 ****************************************************************************
288 *
289 * ACPI Helpers and device model
290 *
291 ****************************************************************************
292 ****************************************************************************/
293
294 /*************************************************************************
295 * ACPI basic handles
296 */
297
298 static acpi_handle root_handle;
299
300 #define TPACPI_HANDLE(object, parent, paths...) \
301 static acpi_handle object##_handle; \
302 static acpi_handle *object##_parent = &parent##_handle; \
303 static char *object##_path; \
304 static char *object##_paths[] = { paths }
305
306 TPACPI_HANDLE(ec, root, "\\_SB.PCI0.ISA.EC0", /* 240, 240x */
307 "\\_SB.PCI.ISA.EC", /* 570 */
308 "\\_SB.PCI0.ISA0.EC0", /* 600e/x, 770e, 770x */
309 "\\_SB.PCI0.ISA.EC", /* A21e, A2xm/p, T20-22, X20-21 */
310 "\\_SB.PCI0.AD4S.EC0", /* i1400, R30 */
311 "\\_SB.PCI0.ICH3.EC0", /* R31 */
312 "\\_SB.PCI0.LPC.EC", /* all others */
313 );
314
315 TPACPI_HANDLE(ecrd, ec, "ECRD"); /* 570 */
316 TPACPI_HANDLE(ecwr, ec, "ECWR"); /* 570 */
317
318 TPACPI_HANDLE(cmos, root, "\\UCMS", /* R50, R50e, R50p, R51, */
319 /* T4x, X31, X40 */
320 "\\CMOS", /* A3x, G4x, R32, T23, T30, X22-24, X30 */
321 "\\CMS", /* R40, R40e */
322 ); /* all others */
323
324 TPACPI_HANDLE(hkey, ec, "\\_SB.HKEY", /* 600e/x, 770e, 770x */
325 "^HKEY", /* R30, R31 */
326 "HKEY", /* all others */
327 ); /* 570 */
328
329 TPACPI_HANDLE(vid, root, "\\_SB.PCI.AGP.VGA", /* 570 */
330 "\\_SB.PCI0.AGP0.VID0", /* 600e/x, 770x */
331 "\\_SB.PCI0.VID0", /* 770e */
332 "\\_SB.PCI0.VID", /* A21e, G4x, R50e, X30, X40 */
333 "\\_SB.PCI0.AGP.VID", /* all others */
334 ); /* R30, R31 */
335
336
337 /*************************************************************************
338 * ACPI helpers
339 */
340
341 static int acpi_evalf(acpi_handle handle,
342 void *res, char *method, char *fmt, ...)
343 {
344 char *fmt0 = fmt;
345 struct acpi_object_list params;
346 union acpi_object in_objs[TPACPI_MAX_ACPI_ARGS];
347 struct acpi_buffer result, *resultp;
348 union acpi_object out_obj;
349 acpi_status status;
350 va_list ap;
351 char res_type;
352 int success;
353 int quiet;
354
355 if (!*fmt) {
356 printk(TPACPI_ERR "acpi_evalf() called with empty format\n");
357 return 0;
358 }
359
360 if (*fmt == 'q') {
361 quiet = 1;
362 fmt++;
363 } else
364 quiet = 0;
365
366 res_type = *(fmt++);
367
368 params.count = 0;
369 params.pointer = &in_objs[0];
370
371 va_start(ap, fmt);
372 while (*fmt) {
373 char c = *(fmt++);
374 switch (c) {
375 case 'd': /* int */
376 in_objs[params.count].integer.value = va_arg(ap, int);
377 in_objs[params.count++].type = ACPI_TYPE_INTEGER;
378 break;
379 /* add more types as needed */
380 default:
381 printk(TPACPI_ERR "acpi_evalf() called "
382 "with invalid format character '%c'\n", c);
383 return 0;
384 }
385 }
386 va_end(ap);
387
388 if (res_type != 'v') {
389 result.length = sizeof(out_obj);
390 result.pointer = &out_obj;
391 resultp = &result;
392 } else
393 resultp = NULL;
394
395 status = acpi_evaluate_object(handle, method, &params, resultp);
396
397 switch (res_type) {
398 case 'd': /* int */
399 if (res)
400 *(int *)res = out_obj.integer.value;
401 success = status == AE_OK && out_obj.type == ACPI_TYPE_INTEGER;
402 break;
403 case 'v': /* void */
404 success = status == AE_OK;
405 break;
406 /* add more types as needed */
407 default:
408 printk(TPACPI_ERR "acpi_evalf() called "
409 "with invalid format character '%c'\n", res_type);
410 return 0;
411 }
412
413 if (!success && !quiet)
414 printk(TPACPI_ERR "acpi_evalf(%s, %s, ...) failed: %d\n",
415 method, fmt0, status);
416
417 return success;
418 }
419
420 static int acpi_ec_read(int i, u8 *p)
421 {
422 int v;
423
424 if (ecrd_handle) {
425 if (!acpi_evalf(ecrd_handle, &v, NULL, "dd", i))
426 return 0;
427 *p = v;
428 } else {
429 if (ec_read(i, p) < 0)
430 return 0;
431 }
432
433 return 1;
434 }
435
436 static int acpi_ec_write(int i, u8 v)
437 {
438 if (ecwr_handle) {
439 if (!acpi_evalf(ecwr_handle, NULL, NULL, "vdd", i, v))
440 return 0;
441 } else {
442 if (ec_write(i, v) < 0)
443 return 0;
444 }
445
446 return 1;
447 }
448
449 #if defined(CONFIG_THINKPAD_ACPI_DOCK) || defined(CONFIG_THINKPAD_ACPI_BAY)
450 static int _sta(acpi_handle handle)
451 {
452 int status;
453
454 if (!handle || !acpi_evalf(handle, &status, "_STA", "d"))
455 status = 0;
456
457 return status;
458 }
459 #endif
460
461 static int issue_thinkpad_cmos_command(int cmos_cmd)
462 {
463 if (!cmos_handle)
464 return -ENXIO;
465
466 if (!acpi_evalf(cmos_handle, NULL, NULL, "vd", cmos_cmd))
467 return -EIO;
468
469 return 0;
470 }
471
472 /*************************************************************************
473 * ACPI device model
474 */
475
476 #define TPACPI_ACPIHANDLE_INIT(object) \
477 drv_acpi_handle_init(#object, &object##_handle, *object##_parent, \
478 object##_paths, ARRAY_SIZE(object##_paths), &object##_path)
479
480 static void drv_acpi_handle_init(char *name,
481 acpi_handle *handle, acpi_handle parent,
482 char **paths, int num_paths, char **path)
483 {
484 int i;
485 acpi_status status;
486
487 vdbg_printk(TPACPI_DBG_INIT, "trying to locate ACPI handle for %s\n",
488 name);
489
490 for (i = 0; i < num_paths; i++) {
491 status = acpi_get_handle(parent, paths[i], handle);
492 if (ACPI_SUCCESS(status)) {
493 *path = paths[i];
494 dbg_printk(TPACPI_DBG_INIT,
495 "Found ACPI handle %s for %s\n",
496 *path, name);
497 return;
498 }
499 }
500
501 vdbg_printk(TPACPI_DBG_INIT, "ACPI handle for %s not found\n",
502 name);
503 *handle = NULL;
504 }
505
506 static void dispatch_acpi_notify(acpi_handle handle, u32 event, void *data)
507 {
508 struct ibm_struct *ibm = data;
509
510 if (tpacpi_lifecycle != TPACPI_LIFE_RUNNING)
511 return;
512
513 if (!ibm || !ibm->acpi || !ibm->acpi->notify)
514 return;
515
516 ibm->acpi->notify(ibm, event);
517 }
518
519 static int __init setup_acpi_notify(struct ibm_struct *ibm)
520 {
521 acpi_status status;
522 int rc;
523
524 BUG_ON(!ibm->acpi);
525
526 if (!*ibm->acpi->handle)
527 return 0;
528
529 vdbg_printk(TPACPI_DBG_INIT,
530 "setting up ACPI notify for %s\n", ibm->name);
531
532 rc = acpi_bus_get_device(*ibm->acpi->handle, &ibm->acpi->device);
533 if (rc < 0) {
534 printk(TPACPI_ERR "acpi_bus_get_device(%s) failed: %d\n",
535 ibm->name, rc);
536 return -ENODEV;
537 }
538
539 acpi_driver_data(ibm->acpi->device) = ibm;
540 sprintf(acpi_device_class(ibm->acpi->device), "%s/%s",
541 TPACPI_ACPI_EVENT_PREFIX,
542 ibm->name);
543
544 status = acpi_install_notify_handler(*ibm->acpi->handle,
545 ibm->acpi->type, dispatch_acpi_notify, ibm);
546 if (ACPI_FAILURE(status)) {
547 if (status == AE_ALREADY_EXISTS) {
548 printk(TPACPI_NOTICE
549 "another device driver is already "
550 "handling %s events\n", ibm->name);
551 } else {
552 printk(TPACPI_ERR
553 "acpi_install_notify_handler(%s) failed: %d\n",
554 ibm->name, status);
555 }
556 return -ENODEV;
557 }
558 ibm->flags.acpi_notify_installed = 1;
559 return 0;
560 }
561
562 static int __init tpacpi_device_add(struct acpi_device *device)
563 {
564 return 0;
565 }
566
567 static int __init register_tpacpi_subdriver(struct ibm_struct *ibm)
568 {
569 int rc;
570
571 dbg_printk(TPACPI_DBG_INIT,
572 "registering %s as an ACPI driver\n", ibm->name);
573
574 BUG_ON(!ibm->acpi);
575
576 ibm->acpi->driver = kzalloc(sizeof(struct acpi_driver), GFP_KERNEL);
577 if (!ibm->acpi->driver) {
578 printk(TPACPI_ERR "kzalloc(ibm->driver) failed\n");
579 return -ENOMEM;
580 }
581
582 sprintf(ibm->acpi->driver->name, "%s_%s", TPACPI_NAME, ibm->name);
583 ibm->acpi->driver->ids = ibm->acpi->hid;
584
585 ibm->acpi->driver->ops.add = &tpacpi_device_add;
586
587 rc = acpi_bus_register_driver(ibm->acpi->driver);
588 if (rc < 0) {
589 printk(TPACPI_ERR "acpi_bus_register_driver(%s) failed: %d\n",
590 ibm->name, rc);
591 kfree(ibm->acpi->driver);
592 ibm->acpi->driver = NULL;
593 } else if (!rc)
594 ibm->flags.acpi_driver_registered = 1;
595
596 return rc;
597 }
598
599
600 /****************************************************************************
601 ****************************************************************************
602 *
603 * Procfs Helpers
604 *
605 ****************************************************************************
606 ****************************************************************************/
607
608 static int dispatch_procfs_read(char *page, char **start, off_t off,
609 int count, int *eof, void *data)
610 {
611 struct ibm_struct *ibm = data;
612 int len;
613
614 if (!ibm || !ibm->read)
615 return -EINVAL;
616
617 len = ibm->read(page);
618 if (len < 0)
619 return len;
620
621 if (len <= off + count)
622 *eof = 1;
623 *start = page + off;
624 len -= off;
625 if (len > count)
626 len = count;
627 if (len < 0)
628 len = 0;
629
630 return len;
631 }
632
633 static int dispatch_procfs_write(struct file *file,
634 const char __user *userbuf,
635 unsigned long count, void *data)
636 {
637 struct ibm_struct *ibm = data;
638 char *kernbuf;
639 int ret;
640
641 if (!ibm || !ibm->write)
642 return -EINVAL;
643
644 kernbuf = kmalloc(count + 2, GFP_KERNEL);
645 if (!kernbuf)
646 return -ENOMEM;
647
648 if (copy_from_user(kernbuf, userbuf, count)) {
649 kfree(kernbuf);
650 return -EFAULT;
651 }
652
653 kernbuf[count] = 0;
654 strcat(kernbuf, ",");
655 ret = ibm->write(kernbuf);
656 if (ret == 0)
657 ret = count;
658
659 kfree(kernbuf);
660
661 return ret;
662 }
663
664 static char *next_cmd(char **cmds)
665 {
666 char *start = *cmds;
667 char *end;
668
669 while ((end = strchr(start, ',')) && end == start)
670 start = end + 1;
671
672 if (!end)
673 return NULL;
674
675 *end = 0;
676 *cmds = end + 1;
677 return start;
678 }
679
680
681 /****************************************************************************
682 ****************************************************************************
683 *
684 * Device model: input, hwmon and platform
685 *
686 ****************************************************************************
687 ****************************************************************************/
688
689 static struct platform_device *tpacpi_pdev;
690 static struct platform_device *tpacpi_sensors_pdev;
691 static struct device *tpacpi_hwmon;
692 static struct input_dev *tpacpi_inputdev;
693 static struct mutex tpacpi_inputdev_send_mutex;
694 static LIST_HEAD(tpacpi_all_drivers);
695
696 static int tpacpi_suspend_handler(struct platform_device *pdev,
697 pm_message_t state)
698 {
699 struct ibm_struct *ibm, *itmp;
700
701 list_for_each_entry_safe(ibm, itmp,
702 &tpacpi_all_drivers,
703 all_drivers) {
704 if (ibm->suspend)
705 (ibm->suspend)(state);
706 }
707
708 return 0;
709 }
710
711 static int tpacpi_resume_handler(struct platform_device *pdev)
712 {
713 struct ibm_struct *ibm, *itmp;
714
715 list_for_each_entry_safe(ibm, itmp,
716 &tpacpi_all_drivers,
717 all_drivers) {
718 if (ibm->resume)
719 (ibm->resume)();
720 }
721
722 return 0;
723 }
724
725 static struct platform_driver tpacpi_pdriver = {
726 .driver = {
727 .name = TPACPI_DRVR_NAME,
728 .owner = THIS_MODULE,
729 },
730 .suspend = tpacpi_suspend_handler,
731 .resume = tpacpi_resume_handler,
732 };
733
734 static struct platform_driver tpacpi_hwmon_pdriver = {
735 .driver = {
736 .name = TPACPI_HWMON_DRVR_NAME,
737 .owner = THIS_MODULE,
738 },
739 };
740
741 /*************************************************************************
742 * sysfs support helpers
743 */
744
745 struct attribute_set {
746 unsigned int members, max_members;
747 struct attribute_group group;
748 };
749
750 struct attribute_set_obj {
751 struct attribute_set s;
752 struct attribute *a;
753 } __attribute__((packed));
754
755 static struct attribute_set *create_attr_set(unsigned int max_members,
756 const char *name)
757 {
758 struct attribute_set_obj *sobj;
759
760 if (max_members == 0)
761 return NULL;
762
763 /* Allocates space for implicit NULL at the end too */
764 sobj = kzalloc(sizeof(struct attribute_set_obj) +
765 max_members * sizeof(struct attribute *),
766 GFP_KERNEL);
767 if (!sobj)
768 return NULL;
769 sobj->s.max_members = max_members;
770 sobj->s.group.attrs = &sobj->a;
771 sobj->s.group.name = name;
772
773 return &sobj->s;
774 }
775
776 #define destroy_attr_set(_set) \
777 kfree(_set);
778
779 /* not multi-threaded safe, use it in a single thread per set */
780 static int add_to_attr_set(struct attribute_set *s, struct attribute *attr)
781 {
782 if (!s || !attr)
783 return -EINVAL;
784
785 if (s->members >= s->max_members)
786 return -ENOMEM;
787
788 s->group.attrs[s->members] = attr;
789 s->members++;
790
791 return 0;
792 }
793
794 static int add_many_to_attr_set(struct attribute_set *s,
795 struct attribute **attr,
796 unsigned int count)
797 {
798 int i, res;
799
800 for (i = 0; i < count; i++) {
801 res = add_to_attr_set(s, attr[i]);
802 if (res)
803 return res;
804 }
805
806 return 0;
807 }
808
809 static void delete_attr_set(struct attribute_set *s, struct kobject *kobj)
810 {
811 sysfs_remove_group(kobj, &s->group);
812 destroy_attr_set(s);
813 }
814
815 #define register_attr_set_with_sysfs(_attr_set, _kobj) \
816 sysfs_create_group(_kobj, &_attr_set->group)
817
818 static int parse_strtoul(const char *buf,
819 unsigned long max, unsigned long *value)
820 {
821 char *endp;
822
823 while (*buf && isspace(*buf))
824 buf++;
825 *value = simple_strtoul(buf, &endp, 0);
826 while (*endp && isspace(*endp))
827 endp++;
828 if (*endp || *value > max)
829 return -EINVAL;
830
831 return 0;
832 }
833
834 static int __init tpacpi_query_bcl_levels(acpi_handle handle)
835 {
836 struct acpi_buffer buffer = { ACPI_ALLOCATE_BUFFER, NULL };
837 union acpi_object *obj;
838 int rc;
839
840 if (ACPI_SUCCESS(acpi_evaluate_object(handle, NULL, NULL, &buffer))) {
841 obj = (union acpi_object *)buffer.pointer;
842 if (!obj || (obj->type != ACPI_TYPE_PACKAGE)) {
843 printk(TPACPI_ERR "Unknown _BCL data, "
844 "please report this to %s\n", TPACPI_MAIL);
845 rc = 0;
846 } else {
847 rc = obj->package.count;
848 }
849 } else {
850 return 0;
851 }
852
853 kfree(buffer.pointer);
854 return rc;
855 }
856
857 static acpi_status __init tpacpi_acpi_walk_find_bcl(acpi_handle handle,
858 u32 lvl, void *context, void **rv)
859 {
860 char name[ACPI_PATH_SEGMENT_LENGTH];
861 struct acpi_buffer buffer = { sizeof(name), &name };
862
863 if (ACPI_SUCCESS(acpi_get_name(handle, ACPI_SINGLE_NAME, &buffer)) &&
864 !strncmp("_BCL", name, sizeof(name) - 1)) {
865 BUG_ON(!rv || !*rv);
866 **(int **)rv = tpacpi_query_bcl_levels(handle);
867 return AE_CTRL_TERMINATE;
868 } else {
869 return AE_OK;
870 }
871 }
872
873 /*
874 * Returns 0 (no ACPI _BCL or _BCL invalid), or size of brightness map
875 */
876 static int __init tpacpi_check_std_acpi_brightness_support(void)
877 {
878 int status;
879 int bcl_levels = 0;
880 void *bcl_ptr = &bcl_levels;
881
882 if (!vid_handle) {
883 TPACPI_ACPIHANDLE_INIT(vid);
884 }
885 if (!vid_handle)
886 return 0;
887
888 /*
889 * Search for a _BCL method, and execute it. This is safe on all
890 * ThinkPads, and as a side-effect, _BCL will place a Lenovo Vista
891 * BIOS in ACPI backlight control mode. We do NOT have to care
892 * about calling the _BCL method in an enabled video device, any
893 * will do for our purposes.
894 */
895
896 status = acpi_walk_namespace(ACPI_TYPE_METHOD, vid_handle, 3,
897 tpacpi_acpi_walk_find_bcl, NULL,
898 &bcl_ptr);
899
900 if (ACPI_SUCCESS(status) && bcl_levels > 2) {
901 tp_features.bright_acpimode = 1;
902 return (bcl_levels - 2);
903 }
904
905 return 0;
906 }
907
908 /*************************************************************************
909 * thinkpad-acpi driver attributes
910 */
911
912 /* interface_version --------------------------------------------------- */
913 static ssize_t tpacpi_driver_interface_version_show(
914 struct device_driver *drv,
915 char *buf)
916 {
917 return snprintf(buf, PAGE_SIZE, "0x%08x\n", TPACPI_SYSFS_VERSION);
918 }
919
920 static DRIVER_ATTR(interface_version, S_IRUGO,
921 tpacpi_driver_interface_version_show, NULL);
922
923 /* debug_level --------------------------------------------------------- */
924 static ssize_t tpacpi_driver_debug_show(struct device_driver *drv,
925 char *buf)
926 {
927 return snprintf(buf, PAGE_SIZE, "0x%04x\n", dbg_level);
928 }
929
930 static ssize_t tpacpi_driver_debug_store(struct device_driver *drv,
931 const char *buf, size_t count)
932 {
933 unsigned long t;
934
935 if (parse_strtoul(buf, 0xffff, &t))
936 return -EINVAL;
937
938 dbg_level = t;
939
940 return count;
941 }
942
943 static DRIVER_ATTR(debug_level, S_IWUSR | S_IRUGO,
944 tpacpi_driver_debug_show, tpacpi_driver_debug_store);
945
946 /* version ------------------------------------------------------------- */
947 static ssize_t tpacpi_driver_version_show(struct device_driver *drv,
948 char *buf)
949 {
950 return snprintf(buf, PAGE_SIZE, "%s v%s\n",
951 TPACPI_DESC, TPACPI_VERSION);
952 }
953
954 static DRIVER_ATTR(version, S_IRUGO,
955 tpacpi_driver_version_show, NULL);
956
957 /* --------------------------------------------------------------------- */
958
959 static struct driver_attribute *tpacpi_driver_attributes[] = {
960 &driver_attr_debug_level, &driver_attr_version,
961 &driver_attr_interface_version,
962 };
963
964 static int __init tpacpi_create_driver_attributes(struct device_driver *drv)
965 {
966 int i, res;
967
968 i = 0;
969 res = 0;
970 while (!res && i < ARRAY_SIZE(tpacpi_driver_attributes)) {
971 res = driver_create_file(drv, tpacpi_driver_attributes[i]);
972 i++;
973 }
974
975 return res;
976 }
977
978 static void tpacpi_remove_driver_attributes(struct device_driver *drv)
979 {
980 int i;
981
982 for (i = 0; i < ARRAY_SIZE(tpacpi_driver_attributes); i++)
983 driver_remove_file(drv, tpacpi_driver_attributes[i]);
984 }
985
986 /****************************************************************************
987 ****************************************************************************
988 *
989 * Subdrivers
990 *
991 ****************************************************************************
992 ****************************************************************************/
993
994 /*************************************************************************
995 * thinkpad-acpi init subdriver
996 */
997
998 static int __init thinkpad_acpi_driver_init(struct ibm_init_struct *iibm)
999 {
1000 printk(TPACPI_INFO "%s v%s\n", TPACPI_DESC, TPACPI_VERSION);
1001 printk(TPACPI_INFO "%s\n", TPACPI_URL);
1002
1003 printk(TPACPI_INFO "ThinkPad BIOS %s, EC %s\n",
1004 (thinkpad_id.bios_version_str) ?
1005 thinkpad_id.bios_version_str : "unknown",
1006 (thinkpad_id.ec_version_str) ?
1007 thinkpad_id.ec_version_str : "unknown");
1008
1009 if (thinkpad_id.vendor && thinkpad_id.model_str)
1010 printk(TPACPI_INFO "%s %s, model %s\n",
1011 (thinkpad_id.vendor == PCI_VENDOR_ID_IBM) ?
1012 "IBM" : ((thinkpad_id.vendor ==
1013 PCI_VENDOR_ID_LENOVO) ?
1014 "Lenovo" : "Unknown vendor"),
1015 thinkpad_id.model_str,
1016 (thinkpad_id.nummodel_str) ?
1017 thinkpad_id.nummodel_str : "unknown");
1018
1019 return 0;
1020 }
1021
1022 static int thinkpad_acpi_driver_read(char *p)
1023 {
1024 int len = 0;
1025
1026 len += sprintf(p + len, "driver:\t\t%s\n", TPACPI_DESC);
1027 len += sprintf(p + len, "version:\t%s\n", TPACPI_VERSION);
1028
1029 return len;
1030 }
1031
1032 static struct ibm_struct thinkpad_acpi_driver_data = {
1033 .name = "driver",
1034 .read = thinkpad_acpi_driver_read,
1035 };
1036
1037 /*************************************************************************
1038 * Hotkey subdriver
1039 */
1040
1041 enum { /* hot key scan codes (derived from ACPI DSDT) */
1042 TP_ACPI_HOTKEYSCAN_FNF1 = 0,
1043 TP_ACPI_HOTKEYSCAN_FNF2,
1044 TP_ACPI_HOTKEYSCAN_FNF3,
1045 TP_ACPI_HOTKEYSCAN_FNF4,
1046 TP_ACPI_HOTKEYSCAN_FNF5,
1047 TP_ACPI_HOTKEYSCAN_FNF6,
1048 TP_ACPI_HOTKEYSCAN_FNF7,
1049 TP_ACPI_HOTKEYSCAN_FNF8,
1050 TP_ACPI_HOTKEYSCAN_FNF9,
1051 TP_ACPI_HOTKEYSCAN_FNF10,
1052 TP_ACPI_HOTKEYSCAN_FNF11,
1053 TP_ACPI_HOTKEYSCAN_FNF12,
1054 TP_ACPI_HOTKEYSCAN_FNBACKSPACE,
1055 TP_ACPI_HOTKEYSCAN_FNINSERT,
1056 TP_ACPI_HOTKEYSCAN_FNDELETE,
1057 TP_ACPI_HOTKEYSCAN_FNHOME,
1058 TP_ACPI_HOTKEYSCAN_FNEND,
1059 TP_ACPI_HOTKEYSCAN_FNPAGEUP,
1060 TP_ACPI_HOTKEYSCAN_FNPAGEDOWN,
1061 TP_ACPI_HOTKEYSCAN_FNSPACE,
1062 TP_ACPI_HOTKEYSCAN_VOLUMEUP,
1063 TP_ACPI_HOTKEYSCAN_VOLUMEDOWN,
1064 TP_ACPI_HOTKEYSCAN_MUTE,
1065 TP_ACPI_HOTKEYSCAN_THINKPAD,
1066 };
1067
1068 enum { /* Keys available through NVRAM polling */
1069 TPACPI_HKEY_NVRAM_KNOWN_MASK = 0x00fb88c0U,
1070 TPACPI_HKEY_NVRAM_GOOD_MASK = 0x00fb8000U,
1071 };
1072
1073 enum { /* Positions of some of the keys in hotkey masks */
1074 TP_ACPI_HKEY_DISPSWTCH_MASK = 1 << TP_ACPI_HOTKEYSCAN_FNF7,
1075 TP_ACPI_HKEY_DISPXPAND_MASK = 1 << TP_ACPI_HOTKEYSCAN_FNF8,
1076 TP_ACPI_HKEY_HIBERNATE_MASK = 1 << TP_ACPI_HOTKEYSCAN_FNF12,
1077 TP_ACPI_HKEY_BRGHTUP_MASK = 1 << TP_ACPI_HOTKEYSCAN_FNHOME,
1078 TP_ACPI_HKEY_BRGHTDWN_MASK = 1 << TP_ACPI_HOTKEYSCAN_FNEND,
1079 TP_ACPI_HKEY_THNKLGHT_MASK = 1 << TP_ACPI_HOTKEYSCAN_FNPAGEUP,
1080 TP_ACPI_HKEY_ZOOM_MASK = 1 << TP_ACPI_HOTKEYSCAN_FNSPACE,
1081 TP_ACPI_HKEY_VOLUP_MASK = 1 << TP_ACPI_HOTKEYSCAN_VOLUMEUP,
1082 TP_ACPI_HKEY_VOLDWN_MASK = 1 << TP_ACPI_HOTKEYSCAN_VOLUMEDOWN,
1083 TP_ACPI_HKEY_MUTE_MASK = 1 << TP_ACPI_HOTKEYSCAN_MUTE,
1084 TP_ACPI_HKEY_THINKPAD_MASK = 1 << TP_ACPI_HOTKEYSCAN_THINKPAD,
1085 };
1086
1087 enum { /* NVRAM to ACPI HKEY group map */
1088 TP_NVRAM_HKEY_GROUP_HK2 = TP_ACPI_HKEY_THINKPAD_MASK |
1089 TP_ACPI_HKEY_ZOOM_MASK |
1090 TP_ACPI_HKEY_DISPSWTCH_MASK |
1091 TP_ACPI_HKEY_HIBERNATE_MASK,
1092 TP_NVRAM_HKEY_GROUP_BRIGHTNESS = TP_ACPI_HKEY_BRGHTUP_MASK |
1093 TP_ACPI_HKEY_BRGHTDWN_MASK,
1094 TP_NVRAM_HKEY_GROUP_VOLUME = TP_ACPI_HKEY_VOLUP_MASK |
1095 TP_ACPI_HKEY_VOLDWN_MASK |
1096 TP_ACPI_HKEY_MUTE_MASK,
1097 };
1098
1099 #ifdef CONFIG_THINKPAD_ACPI_HOTKEY_POLL
1100 struct tp_nvram_state {
1101 u16 thinkpad_toggle:1;
1102 u16 zoom_toggle:1;
1103 u16 display_toggle:1;
1104 u16 thinklight_toggle:1;
1105 u16 hibernate_toggle:1;
1106 u16 displayexp_toggle:1;
1107 u16 display_state:1;
1108 u16 brightness_toggle:1;
1109 u16 volume_toggle:1;
1110 u16 mute:1;
1111
1112 u8 brightness_level;
1113 u8 volume_level;
1114 };
1115
1116 static struct task_struct *tpacpi_hotkey_task;
1117 static u32 hotkey_source_mask; /* bit mask 0=ACPI,1=NVRAM */
1118 static int hotkey_poll_freq = 10; /* Hz */
1119 static struct mutex hotkey_thread_mutex;
1120 static struct mutex hotkey_thread_data_mutex;
1121 static unsigned int hotkey_config_change;
1122
1123 #else /* CONFIG_THINKPAD_ACPI_HOTKEY_POLL */
1124
1125 #define hotkey_source_mask 0U
1126
1127 #endif /* CONFIG_THINKPAD_ACPI_HOTKEY_POLL */
1128
1129 static struct mutex hotkey_mutex;
1130
1131 static enum { /* Reasons for waking up */
1132 TP_ACPI_WAKEUP_NONE = 0, /* None or unknown */
1133 TP_ACPI_WAKEUP_BAYEJ, /* Bay ejection request */
1134 TP_ACPI_WAKEUP_UNDOCK, /* Undock request */
1135 } hotkey_wakeup_reason;
1136
1137 static int hotkey_autosleep_ack;
1138
1139 static int hotkey_orig_status;
1140 static u32 hotkey_orig_mask;
1141 static u32 hotkey_all_mask;
1142 static u32 hotkey_reserved_mask;
1143 static u32 hotkey_mask;
1144
1145 static unsigned int hotkey_report_mode;
1146
1147 static u16 *hotkey_keycode_map;
1148
1149 static struct attribute_set *hotkey_dev_attributes;
1150
1151 #ifdef CONFIG_THINKPAD_ACPI_HOTKEY_POLL
1152 #define HOTKEY_CONFIG_CRITICAL_START \
1153 do { \
1154 mutex_lock(&hotkey_thread_data_mutex); \
1155 hotkey_config_change++; \
1156 } while (0);
1157 #define HOTKEY_CONFIG_CRITICAL_END \
1158 mutex_unlock(&hotkey_thread_data_mutex);
1159 #else
1160 #define HOTKEY_CONFIG_CRITICAL_START
1161 #define HOTKEY_CONFIG_CRITICAL_END
1162 #endif /* CONFIG_THINKPAD_ACPI_HOTKEY_POLL */
1163
1164 /* HKEY.MHKG() return bits */
1165 #define TP_HOTKEY_TABLET_MASK (1 << 3)
1166
1167 static int hotkey_get_wlsw(int *status)
1168 {
1169 if (!acpi_evalf(hkey_handle, status, "WLSW", "d"))
1170 return -EIO;
1171 return 0;
1172 }
1173
1174 static int hotkey_get_tablet_mode(int *status)
1175 {
1176 int s;
1177
1178 if (!acpi_evalf(hkey_handle, &s, "MHKG", "d"))
1179 return -EIO;
1180
1181 *status = ((s & TP_HOTKEY_TABLET_MASK) != 0);
1182 return 0;
1183 }
1184
1185 /*
1186 * Call with hotkey_mutex held
1187 */
1188 static int hotkey_mask_get(void)
1189 {
1190 u32 m = 0;
1191
1192 if (tp_features.hotkey_mask) {
1193 if (!acpi_evalf(hkey_handle, &m, "DHKN", "d"))
1194 return -EIO;
1195 }
1196 hotkey_mask = m | (hotkey_source_mask & hotkey_mask);
1197
1198 return 0;
1199 }
1200
1201 /*
1202 * Call with hotkey_mutex held
1203 */
1204 static int hotkey_mask_set(u32 mask)
1205 {
1206 int i;
1207 int rc = 0;
1208
1209 if (tp_features.hotkey_mask) {
1210 if (!tp_warned.hotkey_mask_ff &&
1211 (mask == 0xffff || mask == 0xffffff ||
1212 mask == 0xffffffff)) {
1213 tp_warned.hotkey_mask_ff = 1;
1214 printk(TPACPI_NOTICE
1215 "setting the hotkey mask to 0x%08x is likely "
1216 "not the best way to go about it\n", mask);
1217 printk(TPACPI_NOTICE
1218 "please consider using the driver defaults, "
1219 "and refer to up-to-date thinkpad-acpi "
1220 "documentation\n");
1221 }
1222
1223 HOTKEY_CONFIG_CRITICAL_START
1224 for (i = 0; i < 32; i++) {
1225 u32 m = 1 << i;
1226 /* enable in firmware mask only keys not in NVRAM
1227 * mode, but enable the key in the cached hotkey_mask
1228 * regardless of mode, or the key will end up
1229 * disabled by hotkey_mask_get() */
1230 if (!acpi_evalf(hkey_handle,
1231 NULL, "MHKM", "vdd", i + 1,
1232 !!((mask & ~hotkey_source_mask) & m))) {
1233 rc = -EIO;
1234 break;
1235 } else {
1236 hotkey_mask = (hotkey_mask & ~m) | (mask & m);
1237 }
1238 }
1239 HOTKEY_CONFIG_CRITICAL_END
1240
1241 /* hotkey_mask_get must be called unconditionally below */
1242 if (!hotkey_mask_get() && !rc &&
1243 (hotkey_mask & ~hotkey_source_mask) !=
1244 (mask & ~hotkey_source_mask)) {
1245 printk(TPACPI_NOTICE
1246 "requested hot key mask 0x%08x, but "
1247 "firmware forced it to 0x%08x\n",
1248 mask, hotkey_mask);
1249 }
1250 } else {
1251 #ifdef CONFIG_THINKPAD_ACPI_HOTKEY_POLL
1252 HOTKEY_CONFIG_CRITICAL_START
1253 hotkey_mask = mask & hotkey_source_mask;
1254 HOTKEY_CONFIG_CRITICAL_END
1255 hotkey_mask_get();
1256 if (hotkey_mask != mask) {
1257 printk(TPACPI_NOTICE
1258 "requested hot key mask 0x%08x, "
1259 "forced to 0x%08x (NVRAM poll mask is "
1260 "0x%08x): no firmware mask support\n",
1261 mask, hotkey_mask, hotkey_source_mask);
1262 }
1263 #else
1264 hotkey_mask_get();
1265 rc = -ENXIO;
1266 #endif /* CONFIG_THINKPAD_ACPI_HOTKEY_POLL */
1267 }
1268
1269 return rc;
1270 }
1271
1272 static int hotkey_status_get(int *status)
1273 {
1274 if (!acpi_evalf(hkey_handle, status, "DHKC", "d"))
1275 return -EIO;
1276
1277 return 0;
1278 }
1279
1280 static int hotkey_status_set(int status)
1281 {
1282 if (!acpi_evalf(hkey_handle, NULL, "MHKC", "vd", status))
1283 return -EIO;
1284
1285 return 0;
1286 }
1287
1288 static void tpacpi_input_send_tabletsw(void)
1289 {
1290 int state;
1291
1292 if (tp_features.hotkey_tablet &&
1293 !hotkey_get_tablet_mode(&state)) {
1294 mutex_lock(&tpacpi_inputdev_send_mutex);
1295
1296 input_report_switch(tpacpi_inputdev,
1297 SW_TABLET_MODE, !!state);
1298 input_sync(tpacpi_inputdev);
1299
1300 mutex_unlock(&tpacpi_inputdev_send_mutex);
1301 }
1302 }
1303
1304 static void tpacpi_input_send_key(unsigned int scancode)
1305 {
1306 unsigned int keycode;
1307
1308 keycode = hotkey_keycode_map[scancode];
1309
1310 if (keycode != KEY_RESERVED) {
1311 mutex_lock(&tpacpi_inputdev_send_mutex);
1312
1313 input_report_key(tpacpi_inputdev, keycode, 1);
1314 if (keycode == KEY_UNKNOWN)
1315 input_event(tpacpi_inputdev, EV_MSC, MSC_SCAN,
1316 scancode);
1317 input_sync(tpacpi_inputdev);
1318
1319 input_report_key(tpacpi_inputdev, keycode, 0);
1320 if (keycode == KEY_UNKNOWN)
1321 input_event(tpacpi_inputdev, EV_MSC, MSC_SCAN,
1322 scancode);
1323 input_sync(tpacpi_inputdev);
1324
1325 mutex_unlock(&tpacpi_inputdev_send_mutex);
1326 }
1327 }
1328
1329 #ifdef CONFIG_THINKPAD_ACPI_HOTKEY_POLL
1330 static struct tp_acpi_drv_struct ibm_hotkey_acpidriver;
1331
1332 static void tpacpi_hotkey_send_key(unsigned int scancode)
1333 {
1334 tpacpi_input_send_key(scancode);
1335 if (hotkey_report_mode < 2) {
1336 acpi_bus_generate_proc_event(ibm_hotkey_acpidriver.device,
1337 0x80, 0x1001 + scancode);
1338 }
1339 }
1340
1341 static void hotkey_read_nvram(struct tp_nvram_state *n, u32 m)
1342 {
1343 u8 d;
1344
1345 if (m & TP_NVRAM_HKEY_GROUP_HK2) {
1346 d = nvram_read_byte(TP_NVRAM_ADDR_HK2);
1347 n->thinkpad_toggle = !!(d & TP_NVRAM_MASK_HKT_THINKPAD);
1348 n->zoom_toggle = !!(d & TP_NVRAM_MASK_HKT_ZOOM);
1349 n->display_toggle = !!(d & TP_NVRAM_MASK_HKT_DISPLAY);
1350 n->hibernate_toggle = !!(d & TP_NVRAM_MASK_HKT_HIBERNATE);
1351 }
1352 if (m & TP_ACPI_HKEY_THNKLGHT_MASK) {
1353 d = nvram_read_byte(TP_NVRAM_ADDR_THINKLIGHT);
1354 n->thinklight_toggle = !!(d & TP_NVRAM_MASK_THINKLIGHT);
1355 }
1356 if (m & TP_ACPI_HKEY_DISPXPAND_MASK) {
1357 d = nvram_read_byte(TP_NVRAM_ADDR_VIDEO);
1358 n->displayexp_toggle =
1359 !!(d & TP_NVRAM_MASK_HKT_DISPEXPND);
1360 }
1361 if (m & TP_NVRAM_HKEY_GROUP_BRIGHTNESS) {
1362 d = nvram_read_byte(TP_NVRAM_ADDR_BRIGHTNESS);
1363 n->brightness_level = (d & TP_NVRAM_MASK_LEVEL_BRIGHTNESS)
1364 >> TP_NVRAM_POS_LEVEL_BRIGHTNESS;
1365 n->brightness_toggle =
1366 !!(d & TP_NVRAM_MASK_HKT_BRIGHTNESS);
1367 }
1368 if (m & TP_NVRAM_HKEY_GROUP_VOLUME) {
1369 d = nvram_read_byte(TP_NVRAM_ADDR_MIXER);
1370 n->volume_level = (d & TP_NVRAM_MASK_LEVEL_VOLUME)
1371 >> TP_NVRAM_POS_LEVEL_VOLUME;
1372 n->mute = !!(d & TP_NVRAM_MASK_MUTE);
1373 n->volume_toggle = !!(d & TP_NVRAM_MASK_HKT_VOLUME);
1374 }
1375 }
1376
1377 #define TPACPI_COMPARE_KEY(__scancode, __member) \
1378 do { \
1379 if ((mask & (1 << __scancode)) && \
1380 oldn->__member != newn->__member) \
1381 tpacpi_hotkey_send_key(__scancode); \
1382 } while (0)
1383
1384 #define TPACPI_MAY_SEND_KEY(__scancode) \
1385 do { if (mask & (1 << __scancode)) \
1386 tpacpi_hotkey_send_key(__scancode); } while (0)
1387
1388 static void hotkey_compare_and_issue_event(struct tp_nvram_state *oldn,
1389 struct tp_nvram_state *newn,
1390 u32 mask)
1391 {
1392 TPACPI_COMPARE_KEY(TP_ACPI_HOTKEYSCAN_THINKPAD, thinkpad_toggle);
1393 TPACPI_COMPARE_KEY(TP_ACPI_HOTKEYSCAN_FNSPACE, zoom_toggle);
1394 TPACPI_COMPARE_KEY(TP_ACPI_HOTKEYSCAN_FNF7, display_toggle);
1395 TPACPI_COMPARE_KEY(TP_ACPI_HOTKEYSCAN_FNF12, hibernate_toggle);
1396
1397 TPACPI_COMPARE_KEY(TP_ACPI_HOTKEYSCAN_FNPAGEUP, thinklight_toggle);
1398
1399 TPACPI_COMPARE_KEY(TP_ACPI_HOTKEYSCAN_FNF8, displayexp_toggle);
1400
1401 /* handle volume */
1402 if (oldn->volume_toggle != newn->volume_toggle) {
1403 if (oldn->mute != newn->mute) {
1404 TPACPI_MAY_SEND_KEY(TP_ACPI_HOTKEYSCAN_MUTE);
1405 }
1406 if (oldn->volume_level > newn->volume_level) {
1407 TPACPI_MAY_SEND_KEY(TP_ACPI_HOTKEYSCAN_VOLUMEDOWN);
1408 } else if (oldn->volume_level < newn->volume_level) {
1409 TPACPI_MAY_SEND_KEY(TP_ACPI_HOTKEYSCAN_VOLUMEUP);
1410 } else if (oldn->mute == newn->mute) {
1411 /* repeated key presses that didn't change state */
1412 if (newn->mute) {
1413 TPACPI_MAY_SEND_KEY(TP_ACPI_HOTKEYSCAN_MUTE);
1414 } else if (newn->volume_level != 0) {
1415 TPACPI_MAY_SEND_KEY(TP_ACPI_HOTKEYSCAN_VOLUMEUP);
1416 } else {
1417 TPACPI_MAY_SEND_KEY(TP_ACPI_HOTKEYSCAN_VOLUMEDOWN);
1418 }
1419 }
1420 }
1421
1422 /* handle brightness */
1423 if (oldn->brightness_toggle != newn->brightness_toggle) {
1424 if (oldn->brightness_level < newn->brightness_level) {
1425 TPACPI_MAY_SEND_KEY(TP_ACPI_HOTKEYSCAN_FNHOME);
1426 } else if (oldn->brightness_level > newn->brightness_level) {
1427 TPACPI_MAY_SEND_KEY(TP_ACPI_HOTKEYSCAN_FNEND);
1428 } else {
1429 /* repeated key presses that didn't change state */
1430 if (newn->brightness_level != 0) {
1431 TPACPI_MAY_SEND_KEY(TP_ACPI_HOTKEYSCAN_FNHOME);
1432 } else {
1433 TPACPI_MAY_SEND_KEY(TP_ACPI_HOTKEYSCAN_FNEND);
1434 }
1435 }
1436 }
1437 }
1438
1439 #undef TPACPI_COMPARE_KEY
1440 #undef TPACPI_MAY_SEND_KEY
1441
1442 static int hotkey_kthread(void *data)
1443 {
1444 struct tp_nvram_state s[2];
1445 u32 mask;
1446 unsigned int si, so;
1447 unsigned long t;
1448 unsigned int change_detector, must_reset;
1449
1450 mutex_lock(&hotkey_thread_mutex);
1451
1452 if (tpacpi_lifecycle == TPACPI_LIFE_EXITING)
1453 goto exit;
1454
1455 set_freezable();
1456
1457 so = 0;
1458 si = 1;
1459 t = 0;
1460
1461 /* Initial state for compares */
1462 mutex_lock(&hotkey_thread_data_mutex);
1463 change_detector = hotkey_config_change;
1464 mask = hotkey_source_mask & hotkey_mask;
1465 mutex_unlock(&hotkey_thread_data_mutex);
1466 hotkey_read_nvram(&s[so], mask);
1467
1468 while (!kthread_should_stop() && hotkey_poll_freq) {
1469 if (t == 0)
1470 t = 1000/hotkey_poll_freq;
1471 t = msleep_interruptible(t);
1472 if (unlikely(kthread_should_stop()))
1473 break;
1474 must_reset = try_to_freeze();
1475 if (t > 0 && !must_reset)
1476 continue;
1477
1478 mutex_lock(&hotkey_thread_data_mutex);
1479 if (must_reset || hotkey_config_change != change_detector) {
1480 /* forget old state on thaw or config change */
1481 si = so;
1482 t = 0;
1483 change_detector = hotkey_config_change;
1484 }
1485 mask = hotkey_source_mask & hotkey_mask;
1486 mutex_unlock(&hotkey_thread_data_mutex);
1487
1488 if (likely(mask)) {
1489 hotkey_read_nvram(&s[si], mask);
1490 if (likely(si != so)) {
1491 hotkey_compare_and_issue_event(&s[so], &s[si],
1492 mask);
1493 }
1494 }
1495
1496 so = si;
1497 si ^= 1;
1498 }
1499
1500 exit:
1501 mutex_unlock(&hotkey_thread_mutex);
1502 return 0;
1503 }
1504
1505 static void hotkey_poll_stop_sync(void)
1506 {
1507 if (tpacpi_hotkey_task) {
1508 if (frozen(tpacpi_hotkey_task) ||
1509 freezing(tpacpi_hotkey_task))
1510 thaw_process(tpacpi_hotkey_task);
1511
1512 kthread_stop(tpacpi_hotkey_task);
1513 tpacpi_hotkey_task = NULL;
1514 mutex_lock(&hotkey_thread_mutex);
1515 /* at this point, the thread did exit */
1516 mutex_unlock(&hotkey_thread_mutex);
1517 }
1518 }
1519
1520 /* call with hotkey_mutex held */
1521 static void hotkey_poll_setup(int may_warn)
1522 {
1523 if ((hotkey_source_mask & hotkey_mask) != 0 &&
1524 hotkey_poll_freq > 0 &&
1525 (tpacpi_inputdev->users > 0 || hotkey_report_mode < 2)) {
1526 if (!tpacpi_hotkey_task) {
1527 tpacpi_hotkey_task = kthread_run(hotkey_kthread,
1528 NULL, TPACPI_NVRAM_KTHREAD_NAME);
1529 if (IS_ERR(tpacpi_hotkey_task)) {
1530 tpacpi_hotkey_task = NULL;
1531 printk(TPACPI_ERR
1532 "could not create kernel thread "
1533 "for hotkey polling\n");
1534 }
1535 }
1536 } else {
1537 hotkey_poll_stop_sync();
1538 if (may_warn &&
1539 hotkey_source_mask != 0 && hotkey_poll_freq == 0) {
1540 printk(TPACPI_NOTICE
1541 "hot keys 0x%08x require polling, "
1542 "which is currently disabled\n",
1543 hotkey_source_mask);
1544 }
1545 }
1546 }
1547
1548 static void hotkey_poll_setup_safe(int may_warn)
1549 {
1550 mutex_lock(&hotkey_mutex);
1551 hotkey_poll_setup(may_warn);
1552 mutex_unlock(&hotkey_mutex);
1553 }
1554
1555 #else /* CONFIG_THINKPAD_ACPI_HOTKEY_POLL */
1556
1557 static void hotkey_poll_setup_safe(int __unused)
1558 {
1559 }
1560
1561 #endif /* CONFIG_THINKPAD_ACPI_HOTKEY_POLL */
1562
1563 static int hotkey_inputdev_open(struct input_dev *dev)
1564 {
1565 switch (tpacpi_lifecycle) {
1566 case TPACPI_LIFE_INIT:
1567 /*
1568 * hotkey_init will call hotkey_poll_setup_safe
1569 * at the appropriate moment
1570 */
1571 return 0;
1572 case TPACPI_LIFE_EXITING:
1573 return -EBUSY;
1574 case TPACPI_LIFE_RUNNING:
1575 hotkey_poll_setup_safe(0);
1576 return 0;
1577 }
1578
1579 /* Should only happen if tpacpi_lifecycle is corrupt */
1580 BUG();
1581 return -EBUSY;
1582 }
1583
1584 static void hotkey_inputdev_close(struct input_dev *dev)
1585 {
1586 /* disable hotkey polling when possible */
1587 if (tpacpi_lifecycle == TPACPI_LIFE_RUNNING)
1588 hotkey_poll_setup_safe(0);
1589 }
1590
1591 /* sysfs hotkey enable ------------------------------------------------- */
1592 static ssize_t hotkey_enable_show(struct device *dev,
1593 struct device_attribute *attr,
1594 char *buf)
1595 {
1596 int res, status;
1597
1598 res = hotkey_status_get(&status);
1599 if (res)
1600 return res;
1601
1602 return snprintf(buf, PAGE_SIZE, "%d\n", status);
1603 }
1604
1605 static ssize_t hotkey_enable_store(struct device *dev,
1606 struct device_attribute *attr,
1607 const char *buf, size_t count)
1608 {
1609 unsigned long t;
1610 int res;
1611
1612 if (parse_strtoul(buf, 1, &t))
1613 return -EINVAL;
1614
1615 res = hotkey_status_set(t);
1616
1617 return (res) ? res : count;
1618 }
1619
1620 static struct device_attribute dev_attr_hotkey_enable =
1621 __ATTR(hotkey_enable, S_IWUSR | S_IRUGO,
1622 hotkey_enable_show, hotkey_enable_store);
1623
1624 /* sysfs hotkey mask --------------------------------------------------- */
1625 static ssize_t hotkey_mask_show(struct device *dev,
1626 struct device_attribute *attr,
1627 char *buf)
1628 {
1629 int res;
1630
1631 if (mutex_lock_interruptible(&hotkey_mutex))
1632 return -ERESTARTSYS;
1633 res = hotkey_mask_get();
1634 mutex_unlock(&hotkey_mutex);
1635
1636 return (res)?
1637 res : snprintf(buf, PAGE_SIZE, "0x%08x\n", hotkey_mask);
1638 }
1639
1640 static ssize_t hotkey_mask_store(struct device *dev,
1641 struct device_attribute *attr,
1642 const char *buf, size_t count)
1643 {
1644 unsigned long t;
1645 int res;
1646
1647 if (parse_strtoul(buf, 0xffffffffUL, &t))
1648 return -EINVAL;
1649
1650 if (mutex_lock_interruptible(&hotkey_mutex))
1651 return -ERESTARTSYS;
1652
1653 res = hotkey_mask_set(t);
1654
1655 #ifdef CONFIG_THINKPAD_ACPI_HOTKEY_POLL
1656 hotkey_poll_setup(1);
1657 #endif
1658
1659 mutex_unlock(&hotkey_mutex);
1660
1661 return (res) ? res : count;
1662 }
1663
1664 static struct device_attribute dev_attr_hotkey_mask =
1665 __ATTR(hotkey_mask, S_IWUSR | S_IRUGO,
1666 hotkey_mask_show, hotkey_mask_store);
1667
1668 /* sysfs hotkey bios_enabled ------------------------------------------- */
1669 static ssize_t hotkey_bios_enabled_show(struct device *dev,
1670 struct device_attribute *attr,
1671 char *buf)
1672 {
1673 return snprintf(buf, PAGE_SIZE, "%d\n", hotkey_orig_status);
1674 }
1675
1676 static struct device_attribute dev_attr_hotkey_bios_enabled =
1677 __ATTR(hotkey_bios_enabled, S_IRUGO, hotkey_bios_enabled_show, NULL);
1678
1679 /* sysfs hotkey bios_mask ---------------------------------------------- */
1680 static ssize_t hotkey_bios_mask_show(struct device *dev,
1681 struct device_attribute *attr,
1682 char *buf)
1683 {
1684 return snprintf(buf, PAGE_SIZE, "0x%08x\n", hotkey_orig_mask);
1685 }
1686
1687 static struct device_attribute dev_attr_hotkey_bios_mask =
1688 __ATTR(hotkey_bios_mask, S_IRUGO, hotkey_bios_mask_show, NULL);
1689
1690 /* sysfs hotkey all_mask ----------------------------------------------- */
1691 static ssize_t hotkey_all_mask_show(struct device *dev,
1692 struct device_attribute *attr,
1693 char *buf)
1694 {
1695 return snprintf(buf, PAGE_SIZE, "0x%08x\n",
1696 hotkey_all_mask | hotkey_source_mask);
1697 }
1698
1699 static struct device_attribute dev_attr_hotkey_all_mask =
1700 __ATTR(hotkey_all_mask, S_IRUGO, hotkey_all_mask_show, NULL);
1701
1702 /* sysfs hotkey recommended_mask --------------------------------------- */
1703 static ssize_t hotkey_recommended_mask_show(struct device *dev,
1704 struct device_attribute *attr,
1705 char *buf)
1706 {
1707 return snprintf(buf, PAGE_SIZE, "0x%08x\n",
1708 (hotkey_all_mask | hotkey_source_mask)
1709 & ~hotkey_reserved_mask);
1710 }
1711
1712 static struct device_attribute dev_attr_hotkey_recommended_mask =
1713 __ATTR(hotkey_recommended_mask, S_IRUGO,
1714 hotkey_recommended_mask_show, NULL);
1715
1716 #ifdef CONFIG_THINKPAD_ACPI_HOTKEY_POLL
1717
1718 /* sysfs hotkey hotkey_source_mask ------------------------------------- */
1719 static ssize_t hotkey_source_mask_show(struct device *dev,
1720 struct device_attribute *attr,
1721 char *buf)
1722 {
1723 return snprintf(buf, PAGE_SIZE, "0x%08x\n", hotkey_source_mask);
1724 }
1725
1726 static ssize_t hotkey_source_mask_store(struct device *dev,
1727 struct device_attribute *attr,
1728 const char *buf, size_t count)
1729 {
1730 unsigned long t;
1731
1732 if (parse_strtoul(buf, 0xffffffffUL, &t) ||
1733 ((t & ~TPACPI_HKEY_NVRAM_KNOWN_MASK) != 0))
1734 return -EINVAL;
1735
1736 if (mutex_lock_interruptible(&hotkey_mutex))
1737 return -ERESTARTSYS;
1738
1739 HOTKEY_CONFIG_CRITICAL_START
1740 hotkey_source_mask = t;
1741 HOTKEY_CONFIG_CRITICAL_END
1742
1743 hotkey_poll_setup(1);
1744
1745 mutex_unlock(&hotkey_mutex);
1746
1747 return count;
1748 }
1749
1750 static struct device_attribute dev_attr_hotkey_source_mask =
1751 __ATTR(hotkey_source_mask, S_IWUSR | S_IRUGO,
1752 hotkey_source_mask_show, hotkey_source_mask_store);
1753
1754 /* sysfs hotkey hotkey_poll_freq --------------------------------------- */
1755 static ssize_t hotkey_poll_freq_show(struct device *dev,
1756 struct device_attribute *attr,
1757 char *buf)
1758 {
1759 return snprintf(buf, PAGE_SIZE, "%d\n", hotkey_poll_freq);
1760 }
1761
1762 static ssize_t hotkey_poll_freq_store(struct device *dev,
1763 struct device_attribute *attr,
1764 const char *buf, size_t count)
1765 {
1766 unsigned long t;
1767
1768 if (parse_strtoul(buf, 25, &t))
1769 return -EINVAL;
1770
1771 if (mutex_lock_interruptible(&hotkey_mutex))
1772 return -ERESTARTSYS;
1773
1774 hotkey_poll_freq = t;
1775
1776 hotkey_poll_setup(1);
1777 mutex_unlock(&hotkey_mutex);
1778
1779 return count;
1780 }
1781
1782 static struct device_attribute dev_attr_hotkey_poll_freq =
1783 __ATTR(hotkey_poll_freq, S_IWUSR | S_IRUGO,
1784 hotkey_poll_freq_show, hotkey_poll_freq_store);
1785
1786 #endif /* CONFIG_THINKPAD_ACPI_HOTKEY_POLL */
1787
1788 /* sysfs hotkey radio_sw (pollable) ------------------------------------ */
1789 static ssize_t hotkey_radio_sw_show(struct device *dev,
1790 struct device_attribute *attr,
1791 char *buf)
1792 {
1793 int res, s;
1794 res = hotkey_get_wlsw(&s);
1795 if (res < 0)
1796 return res;
1797
1798 return snprintf(buf, PAGE_SIZE, "%d\n", !!s);
1799 }
1800
1801 static struct device_attribute dev_attr_hotkey_radio_sw =
1802 __ATTR(hotkey_radio_sw, S_IRUGO, hotkey_radio_sw_show, NULL);
1803
1804 static void hotkey_radio_sw_notify_change(void)
1805 {
1806 if (tp_features.hotkey_wlsw)
1807 sysfs_notify(&tpacpi_pdev->dev.kobj, NULL,
1808 "hotkey_radio_sw");
1809 }
1810
1811 /* sysfs hotkey tablet mode (pollable) --------------------------------- */
1812 static ssize_t hotkey_tablet_mode_show(struct device *dev,
1813 struct device_attribute *attr,
1814 char *buf)
1815 {
1816 int res, s;
1817 res = hotkey_get_tablet_mode(&s);
1818 if (res < 0)
1819 return res;
1820
1821 return snprintf(buf, PAGE_SIZE, "%d\n", !!s);
1822 }
1823
1824 static struct device_attribute dev_attr_hotkey_tablet_mode =
1825 __ATTR(hotkey_tablet_mode, S_IRUGO, hotkey_tablet_mode_show, NULL);
1826
1827 static void hotkey_tablet_mode_notify_change(void)
1828 {
1829 if (tp_features.hotkey_tablet)
1830 sysfs_notify(&tpacpi_pdev->dev.kobj, NULL,
1831 "hotkey_tablet_mode");
1832 }
1833
1834 /* sysfs hotkey report_mode -------------------------------------------- */
1835 static ssize_t hotkey_report_mode_show(struct device *dev,
1836 struct device_attribute *attr,
1837 char *buf)
1838 {
1839 return snprintf(buf, PAGE_SIZE, "%d\n",
1840 (hotkey_report_mode != 0) ? hotkey_report_mode : 1);
1841 }
1842
1843 static struct device_attribute dev_attr_hotkey_report_mode =
1844 __ATTR(hotkey_report_mode, S_IRUGO, hotkey_report_mode_show, NULL);
1845
1846 /* sysfs wakeup reason (pollable) -------------------------------------- */
1847 static ssize_t hotkey_wakeup_reason_show(struct device *dev,
1848 struct device_attribute *attr,
1849 char *buf)
1850 {
1851 return snprintf(buf, PAGE_SIZE, "%d\n", hotkey_wakeup_reason);
1852 }
1853
1854 static struct device_attribute dev_attr_hotkey_wakeup_reason =
1855 __ATTR(wakeup_reason, S_IRUGO, hotkey_wakeup_reason_show, NULL);
1856
1857 static void hotkey_wakeup_reason_notify_change(void)
1858 {
1859 if (tp_features.hotkey_mask)
1860 sysfs_notify(&tpacpi_pdev->dev.kobj, NULL,
1861 "wakeup_reason");
1862 }
1863
1864 /* sysfs wakeup hotunplug_complete (pollable) -------------------------- */
1865 static ssize_t hotkey_wakeup_hotunplug_complete_show(struct device *dev,
1866 struct device_attribute *attr,
1867 char *buf)
1868 {
1869 return snprintf(buf, PAGE_SIZE, "%d\n", hotkey_autosleep_ack);
1870 }
1871
1872 static struct device_attribute dev_attr_hotkey_wakeup_hotunplug_complete =
1873 __ATTR(wakeup_hotunplug_complete, S_IRUGO,
1874 hotkey_wakeup_hotunplug_complete_show, NULL);
1875
1876 static void hotkey_wakeup_hotunplug_complete_notify_change(void)
1877 {
1878 if (tp_features.hotkey_mask)
1879 sysfs_notify(&tpacpi_pdev->dev.kobj, NULL,
1880 "wakeup_hotunplug_complete");
1881 }
1882
1883 /* --------------------------------------------------------------------- */
1884
1885 static struct attribute *hotkey_attributes[] __initdata = {
1886 &dev_attr_hotkey_enable.attr,
1887 &dev_attr_hotkey_bios_enabled.attr,
1888 &dev_attr_hotkey_report_mode.attr,
1889 #ifdef CONFIG_THINKPAD_ACPI_HOTKEY_POLL
1890 &dev_attr_hotkey_mask.attr,
1891 &dev_attr_hotkey_all_mask.attr,
1892 &dev_attr_hotkey_recommended_mask.attr,
1893 &dev_attr_hotkey_source_mask.attr,
1894 &dev_attr_hotkey_poll_freq.attr,
1895 #endif
1896 };
1897
1898 static struct attribute *hotkey_mask_attributes[] __initdata = {
1899 &dev_attr_hotkey_bios_mask.attr,
1900 #ifndef CONFIG_THINKPAD_ACPI_HOTKEY_POLL
1901 &dev_attr_hotkey_mask.attr,
1902 &dev_attr_hotkey_all_mask.attr,
1903 &dev_attr_hotkey_recommended_mask.attr,
1904 #endif
1905 &dev_attr_hotkey_wakeup_reason.attr,
1906 &dev_attr_hotkey_wakeup_hotunplug_complete.attr,
1907 };
1908
1909 static void tpacpi_send_radiosw_update(void)
1910 {
1911 int wlsw;
1912
1913 if (tp_features.hotkey_wlsw && !hotkey_get_wlsw(&wlsw)) {
1914 mutex_lock(&tpacpi_inputdev_send_mutex);
1915
1916 input_report_switch(tpacpi_inputdev,
1917 SW_RFKILL_ALL, !!wlsw);
1918 input_sync(tpacpi_inputdev);
1919
1920 mutex_unlock(&tpacpi_inputdev_send_mutex);
1921 }
1922 hotkey_radio_sw_notify_change();
1923 }
1924
1925 static void hotkey_exit(void)
1926 {
1927 #ifdef CONFIG_THINKPAD_ACPI_HOTKEY_POLL
1928 hotkey_poll_stop_sync();
1929 #endif
1930
1931 if (hotkey_dev_attributes)
1932 delete_attr_set(hotkey_dev_attributes, &tpacpi_pdev->dev.kobj);
1933
1934 kfree(hotkey_keycode_map);
1935
1936 if (tp_features.hotkey) {
1937 dbg_printk(TPACPI_DBG_EXIT,
1938 "restoring original hot key mask\n");
1939 /* no short-circuit boolean operator below! */
1940 if ((hotkey_mask_set(hotkey_orig_mask) |
1941 hotkey_status_set(hotkey_orig_status)) != 0)
1942 printk(TPACPI_ERR
1943 "failed to restore hot key mask "
1944 "to BIOS defaults\n");
1945 }
1946 }
1947
1948 static int __init hotkey_init(struct ibm_init_struct *iibm)
1949 {
1950 /* Requirements for changing the default keymaps:
1951 *
1952 * 1. Many of the keys are mapped to KEY_RESERVED for very
1953 * good reasons. Do not change them unless you have deep
1954 * knowledge on the IBM and Lenovo ThinkPad firmware for
1955 * the various ThinkPad models. The driver behaves
1956 * differently for KEY_RESERVED: such keys have their
1957 * hot key mask *unset* in mask_recommended, and also
1958 * in the initial hot key mask programmed into the
1959 * firmware at driver load time, which means the firm-
1960 * ware may react very differently if you change them to
1961 * something else;
1962 *
1963 * 2. You must be subscribed to the linux-thinkpad and
1964 * ibm-acpi-devel mailing lists, and you should read the
1965 * list archives since 2007 if you want to change the
1966 * keymaps. This requirement exists so that you will
1967 * know the past history of problems with the thinkpad-
1968 * acpi driver keymaps, and also that you will be
1969 * listening to any bug reports;
1970 *
1971 * 3. Do not send thinkpad-acpi specific patches directly to
1972 * for merging, *ever*. Send them to the linux-acpi
1973 * mailinglist for comments. Merging is to be done only
1974 * through acpi-test and the ACPI maintainer.
1975 *
1976 * If the above is too much to ask, don't change the keymap.
1977 * Ask the thinkpad-acpi maintainer to do it, instead.
1978 */
1979 static u16 ibm_keycode_map[] __initdata = {
1980 /* Scan Codes 0x00 to 0x0B: ACPI HKEY FN+F1..F12 */
1981 KEY_FN_F1, KEY_FN_F2, KEY_COFFEE, KEY_SLEEP,
1982 KEY_WLAN, KEY_FN_F6, KEY_SWITCHVIDEOMODE, KEY_FN_F8,
1983 KEY_FN_F9, KEY_FN_F10, KEY_FN_F11, KEY_SUSPEND,
1984
1985 /* Scan codes 0x0C to 0x1F: Other ACPI HKEY hot keys */
1986 KEY_UNKNOWN, /* 0x0C: FN+BACKSPACE */
1987 KEY_UNKNOWN, /* 0x0D: FN+INSERT */
1988 KEY_UNKNOWN, /* 0x0E: FN+DELETE */
1989
1990 /* brightness: firmware always reacts to them, unless
1991 * X.org did some tricks in the radeon BIOS scratch
1992 * registers of *some* models */
1993 KEY_RESERVED, /* 0x0F: FN+HOME (brightness up) */
1994 KEY_RESERVED, /* 0x10: FN+END (brightness down) */
1995
1996 /* Thinklight: firmware always react to it */
1997 KEY_RESERVED, /* 0x11: FN+PGUP (thinklight toggle) */
1998
1999 KEY_UNKNOWN, /* 0x12: FN+PGDOWN */
2000 KEY_ZOOM, /* 0x13: FN+SPACE (zoom) */
2001
2002 /* Volume: firmware always react to it and reprograms
2003 * the built-in *extra* mixer. Never map it to control
2004 * another mixer by default. */
2005 KEY_RESERVED, /* 0x14: VOLUME UP */
2006 KEY_RESERVED, /* 0x15: VOLUME DOWN */
2007 KEY_RESERVED, /* 0x16: MUTE */
2008
2009 KEY_VENDOR, /* 0x17: Thinkpad/AccessIBM/Lenovo */
2010
2011 /* (assignments unknown, please report if found) */
2012 KEY_UNKNOWN, KEY_UNKNOWN, KEY_UNKNOWN, KEY_UNKNOWN,
2013 KEY_UNKNOWN, KEY_UNKNOWN, KEY_UNKNOWN, KEY_UNKNOWN,
2014 };
2015 static u16 lenovo_keycode_map[] __initdata = {
2016 /* Scan Codes 0x00 to 0x0B: ACPI HKEY FN+F1..F12 */
2017 KEY_FN_F1, KEY_COFFEE, KEY_BATTERY, KEY_SLEEP,
2018 KEY_WLAN, KEY_FN_F6, KEY_SWITCHVIDEOMODE, KEY_FN_F8,
2019 KEY_FN_F9, KEY_FN_F10, KEY_FN_F11, KEY_SUSPEND,
2020
2021 /* Scan codes 0x0C to 0x1F: Other ACPI HKEY hot keys */
2022 KEY_UNKNOWN, /* 0x0C: FN+BACKSPACE */
2023 KEY_UNKNOWN, /* 0x0D: FN+INSERT */
2024 KEY_UNKNOWN, /* 0x0E: FN+DELETE */
2025
2026 /* These either have to go through ACPI video, or
2027 * act like in the IBM ThinkPads, so don't ever
2028 * enable them by default */
2029 KEY_RESERVED, /* 0x0F: FN+HOME (brightness up) */
2030 KEY_RESERVED, /* 0x10: FN+END (brightness down) */
2031
2032 KEY_RESERVED, /* 0x11: FN+PGUP (thinklight toggle) */
2033
2034 KEY_UNKNOWN, /* 0x12: FN+PGDOWN */
2035 KEY_ZOOM, /* 0x13: FN+SPACE (zoom) */
2036
2037 /* Volume: z60/z61, T60 (BIOS version?): firmware always
2038 * react to it and reprograms the built-in *extra* mixer.
2039 * Never map it to control another mixer by default.
2040 *
2041 * T60?, T61, R60?, R61: firmware and EC tries to send
2042 * these over the regular keyboard, so these are no-ops,
2043 * but there are still weird bugs re. MUTE, so do not
2044 * change unless you get test reports from all Lenovo
2045 * models. May cause the BIOS to interfere with the
2046 * HDA mixer.
2047 */
2048 KEY_RESERVED, /* 0x14: VOLUME UP */
2049 KEY_RESERVED, /* 0x15: VOLUME DOWN */
2050 KEY_RESERVED, /* 0x16: MUTE */
2051
2052 KEY_VENDOR, /* 0x17: Thinkpad/AccessIBM/Lenovo */
2053
2054 /* (assignments unknown, please report if found) */
2055 KEY_UNKNOWN, KEY_UNKNOWN, KEY_UNKNOWN, KEY_UNKNOWN,
2056 KEY_UNKNOWN, KEY_UNKNOWN, KEY_UNKNOWN, KEY_UNKNOWN,
2057 };
2058
2059 #define TPACPI_HOTKEY_MAP_LEN ARRAY_SIZE(ibm_keycode_map)
2060 #define TPACPI_HOTKEY_MAP_SIZE sizeof(ibm_keycode_map)
2061 #define TPACPI_HOTKEY_MAP_TYPESIZE sizeof(ibm_keycode_map[0])
2062
2063 int res, i;
2064 int status;
2065 int hkeyv;
2066
2067 vdbg_printk(TPACPI_DBG_INIT, "initializing hotkey subdriver\n");
2068
2069 BUG_ON(!tpacpi_inputdev);
2070 BUG_ON(tpacpi_inputdev->open != NULL ||
2071 tpacpi_inputdev->close != NULL);
2072
2073 TPACPI_ACPIHANDLE_INIT(hkey);
2074 mutex_init(&hotkey_mutex);
2075
2076 #ifdef CONFIG_THINKPAD_ACPI_HOTKEY_POLL
2077 mutex_init(&hotkey_thread_mutex);
2078 mutex_init(&hotkey_thread_data_mutex);
2079 #endif
2080
2081 /* hotkey not supported on 570 */
2082 tp_features.hotkey = hkey_handle != NULL;
2083
2084 vdbg_printk(TPACPI_DBG_INIT, "hotkeys are %s\n",
2085 str_supported(tp_features.hotkey));
2086
2087 if (!tp_features.hotkey)
2088 return 1;
2089
2090 hotkey_dev_attributes = create_attr_set(13, NULL);
2091 if (!hotkey_dev_attributes)
2092 return -ENOMEM;
2093 res = add_many_to_attr_set(hotkey_dev_attributes,
2094 hotkey_attributes,
2095 ARRAY_SIZE(hotkey_attributes));
2096 if (res)
2097 goto err_exit;
2098
2099 /* mask not supported on 570, 600e/x, 770e, 770x, A21e, A2xm/p,
2100 A30, R30, R31, T20-22, X20-21, X22-24. Detected by checking
2101 for HKEY interface version 0x100 */
2102 if (acpi_evalf(hkey_handle, &hkeyv, "MHKV", "qd")) {
2103 if ((hkeyv >> 8) != 1) {
2104 printk(TPACPI_ERR "unknown version of the "
2105 "HKEY interface: 0x%x\n", hkeyv);
2106 printk(TPACPI_ERR "please report this to %s\n",
2107 TPACPI_MAIL);
2108 } else {
2109 /*
2110 * MHKV 0x100 in A31, R40, R40e,
2111 * T4x, X31, and later
2112 */
2113 tp_features.hotkey_mask = 1;
2114 }
2115 }
2116
2117 vdbg_printk(TPACPI_DBG_INIT, "hotkey masks are %s\n",
2118 str_supported(tp_features.hotkey_mask));
2119
2120 if (tp_features.hotkey_mask) {
2121 if (!acpi_evalf(hkey_handle, &hotkey_all_mask,
2122 "MHKA", "qd")) {
2123 printk(TPACPI_ERR
2124 "missing MHKA handler, "
2125 "please report this to %s\n",
2126 TPACPI_MAIL);
2127 /* FN+F12, FN+F4, FN+F3 */
2128 hotkey_all_mask = 0x080cU;
2129 }
2130 }
2131
2132 /* hotkey_source_mask *must* be zero for
2133 * the first hotkey_mask_get */
2134 res = hotkey_status_get(&hotkey_orig_status);
2135 if (res)
2136 goto err_exit;
2137
2138 if (tp_features.hotkey_mask) {
2139 res = hotkey_mask_get();
2140 if (res)
2141 goto err_exit;
2142
2143 hotkey_orig_mask = hotkey_mask;
2144 res = add_many_to_attr_set(
2145 hotkey_dev_attributes,
2146 hotkey_mask_attributes,
2147 ARRAY_SIZE(hotkey_mask_attributes));
2148 if (res)
2149 goto err_exit;
2150 }
2151
2152 #ifdef CONFIG_THINKPAD_ACPI_HOTKEY_POLL
2153 if (tp_features.hotkey_mask) {
2154 hotkey_source_mask = TPACPI_HKEY_NVRAM_GOOD_MASK
2155 & ~hotkey_all_mask;
2156 } else {
2157 hotkey_source_mask = TPACPI_HKEY_NVRAM_GOOD_MASK;
2158 }
2159
2160 vdbg_printk(TPACPI_DBG_INIT,
2161 "hotkey source mask 0x%08x, polling freq %d\n",
2162 hotkey_source_mask, hotkey_poll_freq);
2163 #endif
2164
2165 /* Not all thinkpads have a hardware radio switch */
2166 if (acpi_evalf(hkey_handle, &status, "WLSW", "qd")) {
2167 tp_features.hotkey_wlsw = 1;
2168 printk(TPACPI_INFO
2169 "radio switch found; radios are %s\n",
2170 enabled(status, 0));
2171 }
2172 if (tp_features.hotkey_wlsw)
2173 res = add_to_attr_set(hotkey_dev_attributes,
2174 &dev_attr_hotkey_radio_sw.attr);
2175
2176 /* For X41t, X60t, X61t Tablets... */
2177 if (!res && acpi_evalf(hkey_handle, &status, "MHKG", "qd")) {
2178 tp_features.hotkey_tablet = 1;
2179 printk(TPACPI_INFO
2180 "possible tablet mode switch found; "
2181 "ThinkPad in %s mode\n",
2182 (status & TP_HOTKEY_TABLET_MASK)?
2183 "tablet" : "laptop");
2184 res = add_to_attr_set(hotkey_dev_attributes,
2185 &dev_attr_hotkey_tablet_mode.attr);
2186 }
2187
2188 if (!res)
2189 res = register_attr_set_with_sysfs(
2190 hotkey_dev_attributes,
2191 &tpacpi_pdev->dev.kobj);
2192 if (res)
2193 goto err_exit;
2194
2195 /* Set up key map */
2196
2197 hotkey_keycode_map = kmalloc(TPACPI_HOTKEY_MAP_SIZE,
2198 GFP_KERNEL);
2199 if (!hotkey_keycode_map) {
2200 printk(TPACPI_ERR
2201 "failed to allocate memory for key map\n");
2202 res = -ENOMEM;
2203 goto err_exit;
2204 }
2205
2206 if (thinkpad_id.vendor == PCI_VENDOR_ID_LENOVO) {
2207 dbg_printk(TPACPI_DBG_INIT,
2208 "using Lenovo default hot key map\n");
2209 memcpy(hotkey_keycode_map, &lenovo_keycode_map,
2210 TPACPI_HOTKEY_MAP_SIZE);
2211 } else {
2212 dbg_printk(TPACPI_DBG_INIT,
2213 "using IBM default hot key map\n");
2214 memcpy(hotkey_keycode_map, &ibm_keycode_map,
2215 TPACPI_HOTKEY_MAP_SIZE);
2216 }
2217
2218 set_bit(EV_KEY, tpacpi_inputdev->evbit);
2219 set_bit(EV_MSC, tpacpi_inputdev->evbit);
2220 set_bit(MSC_SCAN, tpacpi_inputdev->mscbit);
2221 tpacpi_inputdev->keycodesize = TPACPI_HOTKEY_MAP_TYPESIZE;
2222 tpacpi_inputdev->keycodemax = TPACPI_HOTKEY_MAP_LEN;
2223 tpacpi_inputdev->keycode = hotkey_keycode_map;
2224 for (i = 0; i < TPACPI_HOTKEY_MAP_LEN; i++) {
2225 if (hotkey_keycode_map[i] != KEY_RESERVED) {
2226 set_bit(hotkey_keycode_map[i],
2227 tpacpi_inputdev->keybit);
2228 } else {
2229 if (i < sizeof(hotkey_reserved_mask)*8)
2230 hotkey_reserved_mask |= 1 << i;
2231 }
2232 }
2233
2234 if (tp_features.hotkey_wlsw) {
2235 set_bit(EV_SW, tpacpi_inputdev->evbit);
2236 set_bit(SW_RFKILL_ALL, tpacpi_inputdev->swbit);
2237 }
2238 if (tp_features.hotkey_tablet) {
2239 set_bit(EV_SW, tpacpi_inputdev->evbit);
2240 set_bit(SW_TABLET_MODE, tpacpi_inputdev->swbit);
2241 }
2242
2243 /* Do not issue duplicate brightness change events to
2244 * userspace */
2245 if (!tp_features.bright_acpimode)
2246 /* update bright_acpimode... */
2247 tpacpi_check_std_acpi_brightness_support();
2248
2249 if (tp_features.bright_acpimode) {
2250 printk(TPACPI_INFO
2251 "This ThinkPad has standard ACPI backlight "
2252 "brightness control, supported by the ACPI "
2253 "video driver\n");
2254 printk(TPACPI_NOTICE
2255 "Disabling thinkpad-acpi brightness events "
2256 "by default...\n");
2257
2258 /* The hotkey_reserved_mask change below is not
2259 * necessary while the keys are at KEY_RESERVED in the
2260 * default map, but better safe than sorry, leave it
2261 * here as a marker of what we have to do, especially
2262 * when we finally become able to set this at runtime
2263 * on response to X.org requests */
2264 hotkey_reserved_mask |=
2265 (1 << TP_ACPI_HOTKEYSCAN_FNHOME)
2266 | (1 << TP_ACPI_HOTKEYSCAN_FNEND);
2267 }
2268
2269 dbg_printk(TPACPI_DBG_INIT, "enabling hot key handling\n");
2270 res = hotkey_status_set(1);
2271 if (res) {
2272 hotkey_exit();
2273 return res;
2274 }
2275 res = hotkey_mask_set(((hotkey_all_mask | hotkey_source_mask)
2276 & ~hotkey_reserved_mask)
2277 | hotkey_orig_mask);
2278 if (res < 0 && res != -ENXIO) {
2279 hotkey_exit();
2280 return res;
2281 }
2282
2283 dbg_printk(TPACPI_DBG_INIT,
2284 "legacy hot key reporting over procfs %s\n",
2285 (hotkey_report_mode < 2) ?
2286 "enabled" : "disabled");
2287
2288 tpacpi_inputdev->open = &hotkey_inputdev_open;
2289 tpacpi_inputdev->close = &hotkey_inputdev_close;
2290
2291 hotkey_poll_setup_safe(1);
2292 tpacpi_send_radiosw_update();
2293 tpacpi_input_send_tabletsw();
2294
2295 return 0;
2296
2297 err_exit:
2298 delete_attr_set(hotkey_dev_attributes, &tpacpi_pdev->dev.kobj);
2299 hotkey_dev_attributes = NULL;
2300
2301 return (res < 0)? res : 1;
2302 }
2303
2304 static void hotkey_notify(struct ibm_struct *ibm, u32 event)
2305 {
2306 u32 hkey;
2307 unsigned int scancode;
2308 int send_acpi_ev;
2309 int ignore_acpi_ev;
2310 int unk_ev;
2311
2312 if (event != 0x80) {
2313 printk(TPACPI_ERR
2314 "unknown HKEY notification event %d\n", event);
2315 /* forward it to userspace, maybe it knows how to handle it */
2316 acpi_bus_generate_netlink_event(
2317 ibm->acpi->device->pnp.device_class,
2318 ibm->acpi->device->dev.bus_id,
2319 event, 0);
2320 return;
2321 }
2322
2323 while (1) {
2324 if (!acpi_evalf(hkey_handle, &hkey, "MHKP", "d")) {
2325 printk(TPACPI_ERR "failed to retrieve HKEY event\n");
2326 return;
2327 }
2328
2329 if (hkey == 0) {
2330 /* queue empty */
2331 return;
2332 }
2333
2334 send_acpi_ev = 1;
2335 ignore_acpi_ev = 0;
2336 unk_ev = 0;
2337
2338 switch (hkey >> 12) {
2339 case 1:
2340 /* 0x1000-0x1FFF: key presses */
2341 scancode = hkey & 0xfff;
2342 if (scancode > 0 && scancode < 0x21) {
2343 scancode--;
2344 if (!(hotkey_source_mask & (1 << scancode))) {
2345 tpacpi_input_send_key(scancode);
2346 send_acpi_ev = 0;
2347 } else {
2348 ignore_acpi_ev = 1;
2349 }
2350 } else {
2351 unk_ev = 1;
2352 }
2353 break;
2354 case 2:
2355 /* Wakeup reason */
2356 switch (hkey) {
2357 case 0x2304: /* suspend, undock */
2358 case 0x2404: /* hibernation, undock */
2359 hotkey_wakeup_reason = TP_ACPI_WAKEUP_UNDOCK;
2360 ignore_acpi_ev = 1;
2361 break;
2362 case 0x2305: /* suspend, bay eject */
2363 case 0x2405: /* hibernation, bay eject */
2364 hotkey_wakeup_reason = TP_ACPI_WAKEUP_BAYEJ;
2365 ignore_acpi_ev = 1;
2366 break;
2367 default:
2368 unk_ev = 1;
2369 }
2370 if (hotkey_wakeup_reason != TP_ACPI_WAKEUP_NONE) {
2371 printk(TPACPI_INFO
2372 "woke up due to a hot-unplug "
2373 "request...\n");
2374 hotkey_wakeup_reason_notify_change();
2375 }
2376 break;
2377 case 3:
2378 /* bay-related wakeups */
2379 if (hkey == 0x3003) {
2380 hotkey_autosleep_ack = 1;
2381 printk(TPACPI_INFO
2382 "bay ejected\n");
2383 hotkey_wakeup_hotunplug_complete_notify_change();
2384 } else {
2385 unk_ev = 1;
2386 }
2387 break;
2388 case 4:
2389 /* dock-related wakeups */
2390 if (hkey == 0x4003) {
2391 hotkey_autosleep_ack = 1;
2392 printk(TPACPI_INFO
2393 "undocked\n");
2394 hotkey_wakeup_hotunplug_complete_notify_change();
2395 } else {
2396 unk_ev = 1;
2397 }
2398 break;
2399 case 5:
2400 /* 0x5000-0x5FFF: human interface helpers */
2401 switch (hkey) {
2402 case 0x5010: /* Lenovo new BIOS: brightness changed */
2403 case 0x500b: /* X61t: tablet pen inserted into bay */
2404 case 0x500c: /* X61t: tablet pen removed from bay */
2405 break;
2406 case 0x5009: /* X41t-X61t: swivel up (tablet mode) */
2407 case 0x500a: /* X41t-X61t: swivel down (normal mode) */
2408 tpacpi_input_send_tabletsw();
2409 hotkey_tablet_mode_notify_change();
2410 send_acpi_ev = 0;
2411 break;
2412 case 0x5001:
2413 case 0x5002:
2414 /* LID switch events. Do not propagate */
2415 ignore_acpi_ev = 1;
2416 break;
2417 default:
2418 unk_ev = 1;
2419 }
2420 break;
2421 case 7:
2422 /* 0x7000-0x7FFF: misc */
2423 if (tp_features.hotkey_wlsw && hkey == 0x7000) {
2424 tpacpi_send_radiosw_update();
2425 send_acpi_ev = 0;
2426 break;
2427 }
2428 /* fallthrough to default */
2429 default:
2430 unk_ev = 1;
2431 }
2432 if (unk_ev) {
2433 printk(TPACPI_NOTICE
2434 "unhandled HKEY event 0x%04x\n", hkey);
2435 }
2436
2437 /* Legacy events */
2438 if (!ignore_acpi_ev &&
2439 (send_acpi_ev || hotkey_report_mode < 2)) {
2440 acpi_bus_generate_proc_event(ibm->acpi->device,
2441 event, hkey);
2442 }
2443
2444 /* netlink events */
2445 if (!ignore_acpi_ev && send_acpi_ev) {
2446 acpi_bus_generate_netlink_event(
2447 ibm->acpi->device->pnp.device_class,
2448 ibm->acpi->device->dev.bus_id,
2449 event, hkey);
2450 }
2451 }
2452 }
2453
2454 static void hotkey_suspend(pm_message_t state)
2455 {
2456 /* Do these on suspend, we get the events on early resume! */
2457 hotkey_wakeup_reason = TP_ACPI_WAKEUP_NONE;
2458 hotkey_autosleep_ack = 0;
2459 }
2460
2461 static void hotkey_resume(void)
2462 {
2463 if (hotkey_mask_get())
2464 printk(TPACPI_ERR
2465 "error while trying to read hot key mask "
2466 "from firmware\n");
2467 tpacpi_send_radiosw_update();
2468 hotkey_tablet_mode_notify_change();
2469 hotkey_wakeup_reason_notify_change();
2470 hotkey_wakeup_hotunplug_complete_notify_change();
2471 hotkey_poll_setup_safe(0);
2472 }
2473
2474 /* procfs -------------------------------------------------------------- */
2475 static int hotkey_read(char *p)
2476 {
2477 int res, status;
2478 int len = 0;
2479
2480 if (!tp_features.hotkey) {
2481 len += sprintf(p + len, "status:\t\tnot supported\n");
2482 return len;
2483 }
2484
2485 if (mutex_lock_interruptible(&hotkey_mutex))
2486 return -ERESTARTSYS;
2487 res = hotkey_status_get(&status);
2488 if (!res)
2489 res = hotkey_mask_get();
2490 mutex_unlock(&hotkey_mutex);
2491 if (res)
2492 return res;
2493
2494 len += sprintf(p + len, "status:\t\t%s\n", enabled(status, 0));
2495 if (tp_features.hotkey_mask) {
2496 len += sprintf(p + len, "mask:\t\t0x%08x\n", hotkey_mask);
2497 len += sprintf(p + len,
2498 "commands:\tenable, disable, reset, <mask>\n");
2499 } else {
2500 len += sprintf(p + len, "mask:\t\tnot supported\n");
2501 len += sprintf(p + len, "commands:\tenable, disable, reset\n");
2502 }
2503
2504 return len;
2505 }
2506
2507 static int hotkey_write(char *buf)
2508 {
2509 int res, status;
2510 u32 mask;
2511 char *cmd;
2512
2513 if (!tp_features.hotkey)
2514 return -ENODEV;
2515
2516 if (mutex_lock_interruptible(&hotkey_mutex))
2517 return -ERESTARTSYS;
2518
2519 status = -1;
2520 mask = hotkey_mask;
2521
2522 res = 0;
2523 while ((cmd = next_cmd(&buf))) {
2524 if (strlencmp(cmd, "enable") == 0) {
2525 status = 1;
2526 } else if (strlencmp(cmd, "disable") == 0) {
2527 status = 0;
2528 } else if (strlencmp(cmd, "reset") == 0) {
2529 status = hotkey_orig_status;
2530 mask = hotkey_orig_mask;
2531 } else if (sscanf(cmd, "0x%x", &mask) == 1) {
2532 /* mask set */
2533 } else if (sscanf(cmd, "%x", &mask) == 1) {
2534 /* mask set */
2535 } else {
2536 res = -EINVAL;
2537 goto errexit;
2538 }
2539 }
2540 if (status != -1)
2541 res = hotkey_status_set(status);
2542
2543 if (!res && mask != hotkey_mask)
2544 res = hotkey_mask_set(mask);
2545
2546 errexit:
2547 mutex_unlock(&hotkey_mutex);
2548 return res;
2549 }
2550
2551 static const struct acpi_device_id ibm_htk_device_ids[] = {
2552 {TPACPI_ACPI_HKEY_HID, 0},
2553 {"", 0},
2554 };
2555
2556 static struct tp_acpi_drv_struct ibm_hotkey_acpidriver = {
2557 .hid = ibm_htk_device_ids,
2558 .notify = hotkey_notify,
2559 .handle = &hkey_handle,
2560 .type = ACPI_DEVICE_NOTIFY,
2561 };
2562
2563 static struct ibm_struct hotkey_driver_data = {
2564 .name = "hotkey",
2565 .read = hotkey_read,
2566 .write = hotkey_write,
2567 .exit = hotkey_exit,
2568 .resume = hotkey_resume,
2569 .suspend = hotkey_suspend,
2570 .acpi = &ibm_hotkey_acpidriver,
2571 };
2572
2573 /*************************************************************************
2574 * Bluetooth subdriver
2575 */
2576
2577 enum {
2578 /* ACPI GBDC/SBDC bits */
2579 TP_ACPI_BLUETOOTH_HWPRESENT = 0x01, /* Bluetooth hw available */
2580 TP_ACPI_BLUETOOTH_RADIOSSW = 0x02, /* Bluetooth radio enabled */
2581 TP_ACPI_BLUETOOTH_UNK = 0x04, /* unknown function */
2582 };
2583
2584 static int bluetooth_get_radiosw(void)
2585 {
2586 int status;
2587
2588 if (!tp_features.bluetooth)
2589 return -ENODEV;
2590
2591 if (!acpi_evalf(hkey_handle, &status, "GBDC", "d"))
2592 return -EIO;
2593
2594 return ((status & TP_ACPI_BLUETOOTH_RADIOSSW) != 0);
2595 }
2596
2597 static int bluetooth_set_radiosw(int radio_on)
2598 {
2599 int status;
2600
2601 if (!tp_features.bluetooth)
2602 return -ENODEV;
2603
2604 if (!acpi_evalf(hkey_handle, &status, "GBDC", "d"))
2605 return -EIO;
2606 if (radio_on)
2607 status |= TP_ACPI_BLUETOOTH_RADIOSSW;
2608 else
2609 status &= ~TP_ACPI_BLUETOOTH_RADIOSSW;
2610 if (!acpi_evalf(hkey_handle, NULL, "SBDC", "vd", status))
2611 return -EIO;
2612
2613 return 0;
2614 }
2615
2616 /* sysfs bluetooth enable ---------------------------------------------- */
2617 static ssize_t bluetooth_enable_show(struct device *dev,
2618 struct device_attribute *attr,
2619 char *buf)
2620 {
2621 int status;
2622
2623 status = bluetooth_get_radiosw();
2624 if (status < 0)
2625 return status;
2626
2627 return snprintf(buf, PAGE_SIZE, "%d\n", status ? 1 : 0);
2628 }
2629
2630 static ssize_t bluetooth_enable_store(struct device *dev,
2631 struct device_attribute *attr,
2632 const char *buf, size_t count)
2633 {
2634 unsigned long t;
2635 int res;
2636
2637 if (parse_strtoul(buf, 1, &t))
2638 return -EINVAL;
2639
2640 res = bluetooth_set_radiosw(t);
2641
2642 return (res) ? res : count;
2643 }
2644
2645 static struct device_attribute dev_attr_bluetooth_enable =
2646 __ATTR(bluetooth_enable, S_IWUSR | S_IRUGO,
2647 bluetooth_enable_show, bluetooth_enable_store);
2648
2649 /* --------------------------------------------------------------------- */
2650
2651 static struct attribute *bluetooth_attributes[] = {
2652 &dev_attr_bluetooth_enable.attr,
2653 NULL
2654 };
2655
2656 static const struct attribute_group bluetooth_attr_group = {
2657 .attrs = bluetooth_attributes,
2658 };
2659
2660 static void bluetooth_exit(void)
2661 {
2662 sysfs_remove_group(&tpacpi_pdev->dev.kobj,
2663 &bluetooth_attr_group);
2664 }
2665
2666 static int __init bluetooth_init(struct ibm_init_struct *iibm)
2667 {
2668 int res;
2669 int status = 0;
2670
2671 vdbg_printk(TPACPI_DBG_INIT, "initializing bluetooth subdriver\n");
2672
2673 TPACPI_ACPIHANDLE_INIT(hkey);
2674
2675 /* bluetooth not supported on 570, 600e/x, 770e, 770x, A21e, A2xm/p,
2676 G4x, R30, R31, R40e, R50e, T20-22, X20-21 */
2677 tp_features.bluetooth = hkey_handle &&
2678 acpi_evalf(hkey_handle, &status, "GBDC", "qd");
2679
2680 vdbg_printk(TPACPI_DBG_INIT, "bluetooth is %s, status 0x%02x\n",
2681 str_supported(tp_features.bluetooth),
2682 status);
2683
2684 if (tp_features.bluetooth &&
2685 !(status & TP_ACPI_BLUETOOTH_HWPRESENT)) {
2686 /* no bluetooth hardware present in system */
2687 tp_features.bluetooth = 0;
2688 dbg_printk(TPACPI_DBG_INIT,
2689 "bluetooth hardware not installed\n");
2690 }
2691
2692 if (tp_features.bluetooth) {
2693 res = sysfs_create_group(&tpacpi_pdev->dev.kobj,
2694 &bluetooth_attr_group);
2695 if (res)
2696 return res;
2697 }
2698
2699 return (tp_features.bluetooth)? 0 : 1;
2700 }
2701
2702 /* procfs -------------------------------------------------------------- */
2703 static int bluetooth_read(char *p)
2704 {
2705 int len = 0;
2706 int status = bluetooth_get_radiosw();
2707
2708 if (!tp_features.bluetooth)
2709 len += sprintf(p + len, "status:\t\tnot supported\n");
2710 else {
2711 len += sprintf(p + len, "status:\t\t%s\n",
2712 (status)? "enabled" : "disabled");
2713 len += sprintf(p + len, "commands:\tenable, disable\n");
2714 }
2715
2716 return len;
2717 }
2718
2719 static int bluetooth_write(char *buf)
2720 {
2721 char *cmd;
2722
2723 if (!tp_features.bluetooth)
2724 return -ENODEV;
2725
2726 while ((cmd = next_cmd(&buf))) {
2727 if (strlencmp(cmd, "enable") == 0) {
2728 bluetooth_set_radiosw(1);
2729 } else if (strlencmp(cmd, "disable") == 0) {
2730 bluetooth_set_radiosw(0);
2731 } else
2732 return -EINVAL;
2733 }
2734
2735 return 0;
2736 }
2737
2738 static struct ibm_struct bluetooth_driver_data = {
2739 .name = "bluetooth",
2740 .read = bluetooth_read,
2741 .write = bluetooth_write,
2742 .exit = bluetooth_exit,
2743 };
2744
2745 /*************************************************************************
2746 * Wan subdriver
2747 */
2748
2749 enum {
2750 /* ACPI GWAN/SWAN bits */
2751 TP_ACPI_WANCARD_HWPRESENT = 0x01, /* Wan hw available */
2752 TP_ACPI_WANCARD_RADIOSSW = 0x02, /* Wan radio enabled */
2753 TP_ACPI_WANCARD_UNK = 0x04, /* unknown function */
2754 };
2755
2756 static int wan_get_radiosw(void)
2757 {
2758 int status;
2759
2760 if (!tp_features.wan)
2761 return -ENODEV;
2762
2763 if (!acpi_evalf(hkey_handle, &status, "GWAN", "d"))
2764 return -EIO;
2765
2766 return ((status & TP_ACPI_WANCARD_RADIOSSW) != 0);
2767 }
2768
2769 static int wan_set_radiosw(int radio_on)
2770 {
2771 int status;
2772
2773 if (!tp_features.wan)
2774 return -ENODEV;
2775
2776 if (!acpi_evalf(hkey_handle, &status, "GWAN", "d"))
2777 return -EIO;
2778 if (radio_on)
2779 status |= TP_ACPI_WANCARD_RADIOSSW;
2780 else
2781 status &= ~TP_ACPI_WANCARD_RADIOSSW;
2782 if (!acpi_evalf(hkey_handle, NULL, "SWAN", "vd", status))
2783 return -EIO;
2784
2785 return 0;
2786 }
2787
2788 /* sysfs wan enable ---------------------------------------------------- */
2789 static ssize_t wan_enable_show(struct device *dev,
2790 struct device_attribute *attr,
2791 char *buf)
2792 {
2793 int status;
2794
2795 status = wan_get_radiosw();
2796 if (status < 0)
2797 return status;
2798
2799 return snprintf(buf, PAGE_SIZE, "%d\n", status ? 1 : 0);
2800 }
2801
2802 static ssize_t wan_enable_store(struct device *dev,
2803 struct device_attribute *attr,
2804 const char *buf, size_t count)
2805 {
2806 unsigned long t;
2807 int res;
2808
2809 if (parse_strtoul(buf, 1, &t))
2810 return -EINVAL;
2811
2812 res = wan_set_radiosw(t);
2813
2814 return (res) ? res : count;
2815 }
2816
2817 static struct device_attribute dev_attr_wan_enable =
2818 __ATTR(wwan_enable, S_IWUSR | S_IRUGO,
2819 wan_enable_show, wan_enable_store);
2820
2821 /* --------------------------------------------------------------------- */
2822
2823 static struct attribute *wan_attributes[] = {
2824 &dev_attr_wan_enable.attr,
2825 NULL
2826 };
2827
2828 static const struct attribute_group wan_attr_group = {
2829 .attrs = wan_attributes,
2830 };
2831
2832 static void wan_exit(void)
2833 {
2834 sysfs_remove_group(&tpacpi_pdev->dev.kobj,
2835 &wan_attr_group);
2836 }
2837
2838 static int __init wan_init(struct ibm_init_struct *iibm)
2839 {
2840 int res;
2841 int status = 0;
2842
2843 vdbg_printk(TPACPI_DBG_INIT, "initializing wan subdriver\n");
2844
2845 TPACPI_ACPIHANDLE_INIT(hkey);
2846
2847 tp_features.wan = hkey_handle &&
2848 acpi_evalf(hkey_handle, &status, "GWAN", "qd");
2849
2850 vdbg_printk(TPACPI_DBG_INIT, "wan is %s, status 0x%02x\n",
2851 str_supported(tp_features.wan),
2852 status);
2853
2854 if (tp_features.wan &&
2855 !(status & TP_ACPI_WANCARD_HWPRESENT)) {
2856 /* no wan hardware present in system */
2857 tp_features.wan = 0;
2858 dbg_printk(TPACPI_DBG_INIT,
2859 "wan hardware not installed\n");
2860 }
2861
2862 if (tp_features.wan) {
2863 res = sysfs_create_group(&tpacpi_pdev->dev.kobj,
2864 &wan_attr_group);
2865 if (res)
2866 return res;
2867 }
2868
2869 return (tp_features.wan)? 0 : 1;
2870 }
2871
2872 /* procfs -------------------------------------------------------------- */
2873 static int wan_read(char *p)
2874 {
2875 int len = 0;
2876 int status = wan_get_radiosw();
2877
2878 if (!tp_features.wan)
2879 len += sprintf(p + len, "status:\t\tnot supported\n");
2880 else {
2881 len += sprintf(p + len, "status:\t\t%s\n",
2882 (status)? "enabled" : "disabled");
2883 len += sprintf(p + len, "commands:\tenable, disable\n");
2884 }
2885
2886 return len;
2887 }
2888
2889 static int wan_write(char *buf)
2890 {
2891 char *cmd;
2892
2893 if (!tp_features.wan)
2894 return -ENODEV;
2895
2896 while ((cmd = next_cmd(&buf))) {
2897 if (strlencmp(cmd, "enable") == 0) {
2898 wan_set_radiosw(1);
2899 } else if (strlencmp(cmd, "disable") == 0) {
2900 wan_set_radiosw(0);
2901 } else
2902 return -EINVAL;
2903 }
2904
2905 return 0;
2906 }
2907
2908 static struct ibm_struct wan_driver_data = {
2909 .name = "wan",
2910 .read = wan_read,
2911 .write = wan_write,
2912 .exit = wan_exit,
2913 .flags.experimental = 1,
2914 };
2915
2916 /*************************************************************************
2917 * Video subdriver
2918 */
2919
2920 #ifdef CONFIG_THINKPAD_ACPI_VIDEO
2921
2922 enum video_access_mode {
2923 TPACPI_VIDEO_NONE = 0,
2924 TPACPI_VIDEO_570, /* 570 */
2925 TPACPI_VIDEO_770, /* 600e/x, 770e, 770x */
2926 TPACPI_VIDEO_NEW, /* all others */
2927 };
2928
2929 enum { /* video status flags, based on VIDEO_570 */
2930 TP_ACPI_VIDEO_S_LCD = 0x01, /* LCD output enabled */
2931 TP_ACPI_VIDEO_S_CRT = 0x02, /* CRT output enabled */
2932 TP_ACPI_VIDEO_S_DVI = 0x08, /* DVI output enabled */
2933 };
2934
2935 enum { /* TPACPI_VIDEO_570 constants */
2936 TP_ACPI_VIDEO_570_PHSCMD = 0x87, /* unknown magic constant :( */
2937 TP_ACPI_VIDEO_570_PHSMASK = 0x03, /* PHS bits that map to
2938 * video_status_flags */
2939 TP_ACPI_VIDEO_570_PHS2CMD = 0x8b, /* unknown magic constant :( */
2940 TP_ACPI_VIDEO_570_PHS2SET = 0x80, /* unknown magic constant :( */
2941 };
2942
2943 static enum video_access_mode video_supported;
2944 static int video_orig_autosw;
2945
2946 static int video_autosw_get(void);
2947 static int video_autosw_set(int enable);
2948
2949 TPACPI_HANDLE(vid2, root, "\\_SB.PCI0.AGPB.VID"); /* G41 */
2950
2951 static int __init video_init(struct ibm_init_struct *iibm)
2952 {
2953 int ivga;
2954
2955 vdbg_printk(TPACPI_DBG_INIT, "initializing video subdriver\n");
2956
2957 TPACPI_ACPIHANDLE_INIT(vid);
2958 TPACPI_ACPIHANDLE_INIT(vid2);
2959
2960 if (vid2_handle && acpi_evalf(NULL, &ivga, "\\IVGA", "d") && ivga)
2961 /* G41, assume IVGA doesn't change */
2962 vid_handle = vid2_handle;
2963
2964 if (!vid_handle)
2965 /* video switching not supported on R30, R31 */
2966 video_supported = TPACPI_VIDEO_NONE;
2967 else if (acpi_evalf(vid_handle, &video_orig_autosw, "SWIT", "qd"))
2968 /* 570 */
2969 video_supported = TPACPI_VIDEO_570;
2970 else if (acpi_evalf(vid_handle, &video_orig_autosw, "^VADL", "qd"))
2971 /* 600e/x, 770e, 770x */
2972 video_supported = TPACPI_VIDEO_770;
2973 else
2974 /* all others */
2975 video_supported = TPACPI_VIDEO_NEW;
2976
2977 vdbg_printk(TPACPI_DBG_INIT, "video is %s, mode %d\n",
2978 str_supported(video_supported != TPACPI_VIDEO_NONE),
2979 video_supported);
2980
2981 return (video_supported != TPACPI_VIDEO_NONE)? 0 : 1;
2982 }
2983
2984 static void video_exit(void)
2985 {
2986 dbg_printk(TPACPI_DBG_EXIT,
2987 "restoring original video autoswitch mode\n");
2988 if (video_autosw_set(video_orig_autosw))
2989 printk(TPACPI_ERR "error while trying to restore original "
2990 "video autoswitch mode\n");
2991 }
2992
2993 static int video_outputsw_get(void)
2994 {
2995 int status = 0;
2996 int i;
2997
2998 switch (video_supported) {
2999 case TPACPI_VIDEO_570:
3000 if (!acpi_evalf(NULL, &i, "\\_SB.PHS", "dd",
3001 TP_ACPI_VIDEO_570_PHSCMD))
3002 return -EIO;
3003 status = i & TP_ACPI_VIDEO_570_PHSMASK;
3004 break;
3005 case TPACPI_VIDEO_770:
3006 if (!acpi_evalf(NULL, &i, "\\VCDL", "d"))
3007 return -EIO;
3008 if (i)
3009 status |= TP_ACPI_VIDEO_S_LCD;
3010 if (!acpi_evalf(NULL, &i, "\\VCDC", "d"))
3011 return -EIO;
3012 if (i)
3013 status |= TP_ACPI_VIDEO_S_CRT;
3014 break;
3015 case TPACPI_VIDEO_NEW:
3016 if (!acpi_evalf(NULL, NULL, "\\VUPS", "vd", 1) ||
3017 !acpi_evalf(NULL, &i, "\\VCDC", "d"))
3018 return -EIO;
3019 if (i)
3020 status |= TP_ACPI_VIDEO_S_CRT;
3021
3022 if (!acpi_evalf(NULL, NULL, "\\VUPS", "vd", 0) ||
3023 !acpi_evalf(NULL, &i, "\\VCDL", "d"))
3024 return -EIO;
3025 if (i)
3026 status |= TP_ACPI_VIDEO_S_LCD;
3027 if (!acpi_evalf(NULL, &i, "\\VCDD", "d"))
3028 return -EIO;
3029 if (i)
3030 status |= TP_ACPI_VIDEO_S_DVI;
3031 break;
3032 default:
3033 return -ENOSYS;
3034 }
3035
3036 return status;
3037 }
3038
3039 static int video_outputsw_set(int status)
3040 {
3041 int autosw;
3042 int res = 0;
3043
3044 switch (video_supported) {
3045 case TPACPI_VIDEO_570:
3046 res = acpi_evalf(NULL, NULL,
3047 "\\_SB.PHS2", "vdd",
3048 TP_ACPI_VIDEO_570_PHS2CMD,
3049 status | TP_ACPI_VIDEO_570_PHS2SET);
3050 break;
3051 case TPACPI_VIDEO_770:
3052 autosw = video_autosw_get();
3053 if (autosw < 0)
3054 return autosw;
3055
3056 res = video_autosw_set(1);
3057 if (res)
3058 return res;
3059 res = acpi_evalf(vid_handle, NULL,
3060 "ASWT", "vdd", status * 0x100, 0);
3061 if (!autosw && video_autosw_set(autosw)) {
3062 printk(TPACPI_ERR
3063 "video auto-switch left enabled due to error\n");
3064 return -EIO;
3065 }
3066 break;
3067 case TPACPI_VIDEO_NEW:
3068 res = acpi_evalf(NULL, NULL, "\\VUPS", "vd", 0x80) &&
3069 acpi_evalf(NULL, NULL, "\\VSDS", "vdd", status, 1);
3070 break;
3071 default:
3072 return -ENOSYS;
3073 }
3074
3075 return (res)? 0 : -EIO;
3076 }
3077
3078 static int video_autosw_get(void)
3079 {
3080 int autosw = 0;
3081
3082 switch (video_supported) {
3083 case TPACPI_VIDEO_570:
3084 if (!acpi_evalf(vid_handle, &autosw, "SWIT", "d"))
3085 return -EIO;
3086 break;
3087 case TPACPI_VIDEO_770:
3088 case TPACPI_VIDEO_NEW:
3089 if (!acpi_evalf(vid_handle, &autosw, "^VDEE", "d"))
3090 return -EIO;
3091 break;
3092 default:
3093 return -ENOSYS;
3094 }
3095
3096 return autosw & 1;
3097 }
3098
3099 static int video_autosw_set(int enable)
3100 {
3101 if (!acpi_evalf(vid_handle, NULL, "_DOS", "vd", (enable)? 1 : 0))
3102 return -EIO;
3103 return 0;
3104 }
3105
3106 static int video_outputsw_cycle(void)
3107 {
3108 int autosw = video_autosw_get();
3109 int res;
3110
3111 if (autosw < 0)
3112 return autosw;
3113
3114 switch (video_supported) {
3115 case TPACPI_VIDEO_570:
3116 res = video_autosw_set(1);
3117 if (res)
3118 return res;
3119 res = acpi_evalf(ec_handle, NULL, "_Q16", "v");
3120 break;
3121 case TPACPI_VIDEO_770:
3122 case TPACPI_VIDEO_NEW:
3123 res = video_autosw_set(1);
3124 if (res)
3125 return res;
3126 res = acpi_evalf(vid_handle, NULL, "VSWT", "v");
3127 break;
3128 default:
3129 return -ENOSYS;
3130 }
3131 if (!autosw && video_autosw_set(autosw)) {
3132 printk(TPACPI_ERR
3133 "video auto-switch left enabled due to error\n");
3134 return -EIO;
3135 }
3136
3137 return (res)? 0 : -EIO;
3138 }
3139
3140 static int video_expand_toggle(void)
3141 {
3142 switch (video_supported) {
3143 case TPACPI_VIDEO_570:
3144 return acpi_evalf(ec_handle, NULL, "_Q17", "v")?
3145 0 : -EIO;
3146 case TPACPI_VIDEO_770:
3147 return acpi_evalf(vid_handle, NULL, "VEXP", "v")?
3148 0 : -EIO;
3149 case TPACPI_VIDEO_NEW:
3150 return acpi_evalf(NULL, NULL, "\\VEXP", "v")?
3151 0 : -EIO;
3152 default:
3153 return -ENOSYS;
3154 }
3155 /* not reached */
3156 }
3157
3158 static int video_read(char *p)
3159 {
3160 int status, autosw;
3161 int len = 0;
3162
3163 if (video_supported == TPACPI_VIDEO_NONE) {
3164 len += sprintf(p + len, "status:\t\tnot supported\n");
3165 return len;
3166 }
3167
3168 status = video_outputsw_get();
3169 if (status < 0)
3170 return status;
3171
3172 autosw = video_autosw_get();
3173 if (autosw < 0)
3174 return autosw;
3175
3176 len += sprintf(p + len, "status:\t\tsupported\n");
3177 len += sprintf(p + len, "lcd:\t\t%s\n", enabled(status, 0));
3178 len += sprintf(p + len, "crt:\t\t%s\n", enabled(status, 1));
3179 if (video_supported == TPACPI_VIDEO_NEW)
3180 len += sprintf(p + len, "dvi:\t\t%s\n", enabled(status, 3));
3181 len += sprintf(p + len, "auto:\t\t%s\n", enabled(autosw, 0));
3182 len += sprintf(p + len, "commands:\tlcd_enable, lcd_disable\n");
3183 len += sprintf(p + len, "commands:\tcrt_enable, crt_disable\n");
3184 if (video_supported == TPACPI_VIDEO_NEW)
3185 len += sprintf(p + len, "commands:\tdvi_enable, dvi_disable\n");
3186 len += sprintf(p + len, "commands:\tauto_enable, auto_disable\n");
3187 len += sprintf(p + len, "commands:\tvideo_switch, expand_toggle\n");
3188
3189 return len;
3190 }
3191
3192 static int video_write(char *buf)
3193 {
3194 char *cmd;
3195 int enable, disable, status;
3196 int res;
3197
3198 if (video_supported == TPACPI_VIDEO_NONE)
3199 return -ENODEV;
3200
3201 enable = 0;
3202 disable = 0;
3203
3204 while ((cmd = next_cmd(&buf))) {
3205 if (strlencmp(cmd, "lcd_enable") == 0) {
3206 enable |= TP_ACPI_VIDEO_S_LCD;
3207 } else if (strlencmp(cmd, "lcd_disable") == 0) {
3208 disable |= TP_ACPI_VIDEO_S_LCD;
3209 } else if (strlencmp(cmd, "crt_enable") == 0) {
3210 enable |= TP_ACPI_VIDEO_S_CRT;
3211 } else if (strlencmp(cmd, "crt_disable") == 0) {
3212 disable |= TP_ACPI_VIDEO_S_CRT;
3213 } else if (video_supported == TPACPI_VIDEO_NEW &&
3214 strlencmp(cmd, "dvi_enable") == 0) {
3215 enable |= TP_ACPI_VIDEO_S_DVI;
3216 } else if (video_supported == TPACPI_VIDEO_NEW &&
3217 strlencmp(cmd, "dvi_disable") == 0) {
3218 disable |= TP_ACPI_VIDEO_S_DVI;
3219 } else if (strlencmp(cmd, "auto_enable") == 0) {
3220 res = video_autosw_set(1);
3221 if (res)
3222 return res;
3223 } else if (strlencmp(cmd, "auto_disable") == 0) {
3224 res = video_autosw_set(0);
3225 if (res)
3226 return res;
3227 } else if (strlencmp(cmd, "video_switch") == 0) {
3228 res = video_outputsw_cycle();
3229 if (res)
3230 return res;
3231 } else if (strlencmp(cmd, "expand_toggle") == 0) {
3232 res = video_expand_toggle();
3233 if (res)
3234 return res;
3235 } else
3236 return -EINVAL;
3237 }
3238
3239 if (enable || disable) {
3240 status = video_outputsw_get();
3241 if (status < 0)
3242 return status;
3243 res = video_outputsw_set((status & ~disable) | enable);
3244 if (res)
3245 return res;
3246 }
3247
3248 return 0;
3249 }
3250
3251 static struct ibm_struct video_driver_data = {
3252 .name = "video",
3253 .read = video_read,
3254 .write = video_write,
3255 .exit = video_exit,
3256 };
3257
3258 #endif /* CONFIG_THINKPAD_ACPI_VIDEO */
3259
3260 /*************************************************************************
3261 * Light (thinklight) subdriver
3262 */
3263
3264 TPACPI_HANDLE(lght, root, "\\LGHT"); /* A21e, A2xm/p, T20-22, X20-21 */
3265 TPACPI_HANDLE(ledb, ec, "LEDB"); /* G4x */
3266
3267 static int light_get_status(void)
3268 {
3269 int status = 0;
3270
3271 if (tp_features.light_status) {
3272 if (!acpi_evalf(ec_handle, &status, "KBLT", "d"))
3273 return -EIO;
3274 return (!!status);
3275 }
3276
3277 return -ENXIO;
3278 }
3279
3280 static int light_set_status(int status)
3281 {
3282 int rc;
3283
3284 if (tp_features.light) {
3285 if (cmos_handle) {
3286 rc = acpi_evalf(cmos_handle, NULL, NULL, "vd",
3287 (status)?
3288 TP_CMOS_THINKLIGHT_ON :
3289 TP_CMOS_THINKLIGHT_OFF);
3290 } else {
3291 rc = acpi_evalf(lght_handle, NULL, NULL, "vd",
3292 (status)? 1 : 0);
3293 }
3294 return (rc)? 0 : -EIO;
3295 }
3296
3297 return -ENXIO;
3298 }
3299
3300 static void light_set_status_worker(struct work_struct *work)
3301 {
3302 struct tpacpi_led_classdev *data =
3303 container_of(work, struct tpacpi_led_classdev, work);
3304
3305 if (likely(tpacpi_lifecycle == TPACPI_LIFE_RUNNING))
3306 light_set_status((data->new_brightness != LED_OFF));
3307 }
3308
3309 static void light_sysfs_set(struct led_classdev *led_cdev,
3310 enum led_brightness brightness)
3311 {
3312 struct tpacpi_led_classdev *data =
3313 container_of(led_cdev,
3314 struct tpacpi_led_classdev,
3315 led_classdev);
3316 data->new_brightness = brightness;
3317 queue_work(tpacpi_wq, &data->work);
3318 }
3319
3320 static enum led_brightness light_sysfs_get(struct led_classdev *led_cdev)
3321 {
3322 return (light_get_status() == 1)? LED_FULL : LED_OFF;
3323 }
3324
3325 static struct tpacpi_led_classdev tpacpi_led_thinklight = {
3326 .led_classdev = {
3327 .name = "tpacpi::thinklight",
3328 .brightness_set = &light_sysfs_set,
3329 .brightness_get = &light_sysfs_get,
3330 }
3331 };
3332
3333 static int __init light_init(struct ibm_init_struct *iibm)
3334 {
3335 int rc;
3336
3337 vdbg_printk(TPACPI_DBG_INIT, "initializing light subdriver\n");
3338
3339 TPACPI_ACPIHANDLE_INIT(ledb);
3340 TPACPI_ACPIHANDLE_INIT(lght);
3341 TPACPI_ACPIHANDLE_INIT(cmos);
3342 INIT_WORK(&tpacpi_led_thinklight.work, light_set_status_worker);
3343
3344 /* light not supported on 570, 600e/x, 770e, 770x, G4x, R30, R31 */
3345 tp_features.light = (cmos_handle || lght_handle) && !ledb_handle;
3346
3347 if (tp_features.light)
3348 /* light status not supported on
3349 570, 600e/x, 770e, 770x, G4x, R30, R31, R32, X20 */
3350 tp_features.light_status =
3351 acpi_evalf(ec_handle, NULL, "KBLT", "qv");
3352
3353 vdbg_printk(TPACPI_DBG_INIT, "light is %s, light status is %s\n",
3354 str_supported(tp_features.light),
3355 str_supported(tp_features.light_status));
3356
3357 if (!tp_features.light)
3358 return 1;
3359
3360 rc = led_classdev_register(&tpacpi_pdev->dev,
3361 &tpacpi_led_thinklight.led_classdev);
3362
3363 if (rc < 0) {
3364 tp_features.light = 0;
3365 tp_features.light_status = 0;
3366 } else {
3367 rc = 0;
3368 }
3369
3370 return rc;
3371 }
3372
3373 static void light_exit(void)
3374 {
3375 led_classdev_unregister(&tpacpi_led_thinklight.led_classdev);
3376 if (work_pending(&tpacpi_led_thinklight.work))
3377 flush_workqueue(tpacpi_wq);
3378 }
3379
3380 static int light_read(char *p)
3381 {
3382 int len = 0;
3383 int status;
3384
3385 if (!tp_features.light) {
3386 len += sprintf(p + len, "status:\t\tnot supported\n");
3387 } else if (!tp_features.light_status) {
3388 len += sprintf(p + len, "status:\t\tunknown\n");
3389 len += sprintf(p + len, "commands:\ton, off\n");
3390 } else {
3391 status = light_get_status();
3392 if (status < 0)
3393 return status;
3394 len += sprintf(p + len, "status:\t\t%s\n", onoff(status, 0));
3395 len += sprintf(p + len, "commands:\ton, off\n");
3396 }
3397
3398 return len;
3399 }
3400
3401 static int light_write(char *buf)
3402 {
3403 char *cmd;
3404 int newstatus = 0;
3405
3406 if (!tp_features.light)
3407 return -ENODEV;
3408
3409 while ((cmd = next_cmd(&buf))) {
3410 if (strlencmp(cmd, "on") == 0) {
3411 newstatus = 1;
3412 } else if (strlencmp(cmd, "off") == 0) {
3413 newstatus = 0;
3414 } else
3415 return -EINVAL;
3416 }
3417
3418 return light_set_status(newstatus);
3419 }
3420
3421 static struct ibm_struct light_driver_data = {
3422 .name = "light",
3423 .read = light_read,
3424 .write = light_write,
3425 .exit = light_exit,
3426 };
3427
3428 /*************************************************************************
3429 * Dock subdriver
3430 */
3431
3432 #ifdef CONFIG_THINKPAD_ACPI_DOCK
3433
3434 static void dock_notify(struct ibm_struct *ibm, u32 event);
3435 static int dock_read(char *p);
3436 static int dock_write(char *buf);
3437
3438 TPACPI_HANDLE(dock, root, "\\_SB.GDCK", /* X30, X31, X40 */
3439 "\\_SB.PCI0.DOCK", /* 600e/x,770e,770x,A2xm/p,T20-22,X20-21 */
3440 "\\_SB.PCI0.PCI1.DOCK", /* all others */
3441 "\\_SB.PCI.ISA.SLCE", /* 570 */
3442 ); /* A21e,G4x,R30,R31,R32,R40,R40e,R50e */
3443
3444 /* don't list other alternatives as we install a notify handler on the 570 */
3445 TPACPI_HANDLE(pci, root, "\\_SB.PCI"); /* 570 */
3446
3447 static const struct acpi_device_id ibm_pci_device_ids[] = {
3448 {PCI_ROOT_HID_STRING, 0},
3449 {"", 0},
3450 };
3451
3452 static struct tp_acpi_drv_struct ibm_dock_acpidriver[2] = {
3453 {
3454 .notify = dock_notify,
3455 .handle = &dock_handle,
3456 .type = ACPI_SYSTEM_NOTIFY,
3457 },
3458 {
3459 /* THIS ONE MUST NEVER BE USED FOR DRIVER AUTOLOADING.
3460 * We just use it to get notifications of dock hotplug
3461 * in very old thinkpads */
3462 .hid = ibm_pci_device_ids,
3463 .notify = dock_notify,
3464 .handle = &pci_handle,
3465 .type = ACPI_SYSTEM_NOTIFY,
3466 },
3467 };
3468
3469 static struct ibm_struct dock_driver_data[2] = {
3470 {
3471 .name = "dock",
3472 .read = dock_read,
3473 .write = dock_write,
3474 .acpi = &ibm_dock_acpidriver[0],
3475 },
3476 {
3477 .name = "dock",
3478 .acpi = &ibm_dock_acpidriver[1],
3479 },
3480 };
3481
3482 #define dock_docked() (_sta(dock_handle) & 1)
3483
3484 static int __init dock_init(struct ibm_init_struct *iibm)
3485 {
3486 vdbg_printk(TPACPI_DBG_INIT, "initializing dock subdriver\n");
3487
3488 TPACPI_ACPIHANDLE_INIT(dock);
3489
3490 vdbg_printk(TPACPI_DBG_INIT, "dock is %s\n",
3491 str_supported(dock_handle != NULL));
3492
3493 return (dock_handle)? 0 : 1;
3494 }
3495
3496 static int __init dock_init2(struct ibm_init_struct *iibm)
3497 {
3498 int dock2_needed;
3499
3500 vdbg_printk(TPACPI_DBG_INIT, "initializing dock subdriver part 2\n");
3501
3502 if (dock_driver_data[0].flags.acpi_driver_registered &&
3503 dock_driver_data[0].flags.acpi_notify_installed) {
3504 TPACPI_ACPIHANDLE_INIT(pci);
3505 dock2_needed = (pci_handle != NULL);
3506 vdbg_printk(TPACPI_DBG_INIT,
3507 "dock PCI handler for the TP 570 is %s\n",
3508 str_supported(dock2_needed));
3509 } else {
3510 vdbg_printk(TPACPI_DBG_INIT,
3511 "dock subdriver part 2 not required\n");
3512 dock2_needed = 0;
3513 }
3514
3515 return (dock2_needed)? 0 : 1;
3516 }
3517
3518 static void dock_notify(struct ibm_struct *ibm, u32 event)
3519 {
3520 int docked = dock_docked();
3521 int pci = ibm->acpi->hid && ibm->acpi->device &&
3522 acpi_match_device_ids(ibm->acpi->device, ibm_pci_device_ids);
3523 int data;
3524
3525 if (event == 1 && !pci) /* 570 */
3526 data = 1; /* button */
3527 else if (event == 1 && pci) /* 570 */
3528 data = 3; /* dock */
3529 else if (event == 3 && docked)
3530 data = 1; /* button */
3531 else if (event == 3 && !docked)
3532 data = 2; /* undock */
3533 else if (event == 0 && docked)
3534 data = 3; /* dock */
3535 else {
3536 printk(TPACPI_ERR "unknown dock event %d, status %d\n",
3537 event, _sta(dock_handle));
3538 data = 0; /* unknown */
3539 }
3540 acpi_bus_generate_proc_event(ibm->acpi->device, event, data);
3541 acpi_bus_generate_netlink_event(ibm->acpi->device->pnp.device_class,
3542 ibm->acpi->device->dev.bus_id,
3543 event, data);
3544 }
3545
3546 static int dock_read(char *p)
3547 {
3548 int len = 0;
3549 int docked = dock_docked();
3550
3551 if (!dock_handle)
3552 len += sprintf(p + len, "status:\t\tnot supported\n");
3553 else if (!docked)
3554 len += sprintf(p + len, "status:\t\tundocked\n");
3555 else {
3556 len += sprintf(p + len, "status:\t\tdocked\n");
3557 len += sprintf(p + len, "commands:\tdock, undock\n");
3558 }
3559
3560 return len;
3561 }
3562
3563 static int dock_write(char *buf)
3564 {
3565 char *cmd;
3566
3567 if (!dock_docked())
3568 return -ENODEV;
3569
3570 while ((cmd = next_cmd(&buf))) {
3571 if (strlencmp(cmd, "undock") == 0) {
3572 if (!acpi_evalf(dock_handle, NULL, "_DCK", "vd", 0) ||
3573 !acpi_evalf(dock_handle, NULL, "_EJ0", "vd", 1))
3574 return -EIO;
3575 } else if (strlencmp(cmd, "dock") == 0) {
3576 if (!acpi_evalf(dock_handle, NULL, "_DCK", "vd", 1))
3577 return -EIO;
3578 } else
3579 return -EINVAL;
3580 }
3581
3582 return 0;
3583 }
3584
3585 #endif /* CONFIG_THINKPAD_ACPI_DOCK */
3586
3587 /*************************************************************************
3588 * Bay subdriver
3589 */
3590
3591 #ifdef CONFIG_THINKPAD_ACPI_BAY
3592
3593 TPACPI_HANDLE(bay, root, "\\_SB.PCI.IDE.SECN.MAST", /* 570 */
3594 "\\_SB.PCI0.IDE0.IDES.IDSM", /* 600e/x, 770e, 770x */
3595 "\\_SB.PCI0.SATA.SCND.MSTR", /* T60, X60, Z60 */
3596 "\\_SB.PCI0.IDE0.SCND.MSTR", /* all others */
3597 ); /* A21e, R30, R31 */
3598 TPACPI_HANDLE(bay_ej, bay, "_EJ3", /* 600e/x, A2xm/p, A3x */
3599 "_EJ0", /* all others */
3600 ); /* 570,A21e,G4x,R30,R31,R32,R40e,R50e */
3601 TPACPI_HANDLE(bay2, root, "\\_SB.PCI0.IDE0.PRIM.SLAV", /* A3x, R32 */
3602 "\\_SB.PCI0.IDE0.IDEP.IDPS", /* 600e/x, 770e, 770x */
3603 ); /* all others */
3604 TPACPI_HANDLE(bay2_ej, bay2, "_EJ3", /* 600e/x, 770e, A3x */
3605 "_EJ0", /* 770x */
3606 ); /* all others */
3607
3608 static int __init bay_init(struct ibm_init_struct *iibm)
3609 {
3610 vdbg_printk(TPACPI_DBG_INIT, "initializing bay subdriver\n");
3611
3612 TPACPI_ACPIHANDLE_INIT(bay);
3613 if (bay_handle)
3614 TPACPI_ACPIHANDLE_INIT(bay_ej);
3615 TPACPI_ACPIHANDLE_INIT(bay2);
3616 if (bay2_handle)
3617 TPACPI_ACPIHANDLE_INIT(bay2_ej);
3618
3619 tp_features.bay_status = bay_handle &&
3620 acpi_evalf(bay_handle, NULL, "_STA", "qv");
3621 tp_features.bay_status2 = bay2_handle &&
3622 acpi_evalf(bay2_handle, NULL, "_STA", "qv");
3623
3624 tp_features.bay_eject = bay_handle && bay_ej_handle &&
3625 (strlencmp(bay_ej_path, "_EJ0") == 0 || experimental);
3626 tp_features.bay_eject2 = bay2_handle && bay2_ej_handle &&
3627 (strlencmp(bay2_ej_path, "_EJ0") == 0 || experimental);
3628
3629 vdbg_printk(TPACPI_DBG_INIT,
3630 "bay 1: status %s, eject %s; bay 2: status %s, eject %s\n",
3631 str_supported(tp_features.bay_status),
3632 str_supported(tp_features.bay_eject),
3633 str_supported(tp_features.bay_status2),
3634 str_supported(tp_features.bay_eject2));
3635
3636 return (tp_features.bay_status || tp_features.bay_eject ||
3637 tp_features.bay_status2 || tp_features.bay_eject2)? 0 : 1;
3638 }
3639
3640 static void bay_notify(struct ibm_struct *ibm, u32 event)
3641 {
3642 acpi_bus_generate_proc_event(ibm->acpi->device, event, 0);
3643 acpi_bus_generate_netlink_event(ibm->acpi->device->pnp.device_class,
3644 ibm->acpi->device->dev.bus_id,
3645 event, 0);
3646 }
3647
3648 #define bay_occupied(b) (_sta(b##_handle) & 1)
3649
3650 static int bay_read(char *p)
3651 {
3652 int len = 0;
3653 int occupied = bay_occupied(bay);
3654 int occupied2 = bay_occupied(bay2);
3655 int eject, eject2;
3656
3657 len += sprintf(p + len, "status:\t\t%s\n",
3658 tp_features.bay_status ?
3659 (occupied ? "occupied" : "unoccupied") :
3660 "not supported");
3661 if (tp_features.bay_status2)
3662 len += sprintf(p + len, "status2:\t%s\n", occupied2 ?
3663 "occupied" : "unoccupied");
3664
3665 eject = tp_features.bay_eject && occupied;
3666 eject2 = tp_features.bay_eject2 && occupied2;
3667
3668 if (eject && eject2)
3669 len += sprintf(p + len, "commands:\teject, eject2\n");
3670 else if (eject)
3671 len += sprintf(p + len, "commands:\teject\n");
3672 else if (eject2)
3673 len += sprintf(p + len, "commands:\teject2\n");
3674
3675 return len;
3676 }
3677
3678 static int bay_write(char *buf)
3679 {
3680 char *cmd;
3681
3682 if (!tp_features.bay_eject && !tp_features.bay_eject2)
3683 return -ENODEV;
3684
3685 while ((cmd = next_cmd(&buf))) {
3686 if (tp_features.bay_eject && strlencmp(cmd, "eject") == 0) {
3687 if (!acpi_evalf(bay_ej_handle, NULL, NULL, "vd", 1))
3688 return -EIO;
3689 } else if (tp_features.bay_eject2 &&
3690 strlencmp(cmd, "eject2") == 0) {
3691 if (!acpi_evalf(bay2_ej_handle, NULL, NULL, "vd", 1))
3692 return -EIO;
3693 } else
3694 return -EINVAL;
3695 }
3696
3697 return 0;
3698 }
3699
3700 static struct tp_acpi_drv_struct ibm_bay_acpidriver = {
3701 .notify = bay_notify,
3702 .handle = &bay_handle,
3703 .type = ACPI_SYSTEM_NOTIFY,
3704 };
3705
3706 static struct ibm_struct bay_driver_data = {
3707 .name = "bay",
3708 .read = bay_read,
3709 .write = bay_write,
3710 .acpi = &ibm_bay_acpidriver,
3711 };
3712
3713 #endif /* CONFIG_THINKPAD_ACPI_BAY */
3714
3715 /*************************************************************************
3716 * CMOS subdriver
3717 */
3718
3719 /* sysfs cmos_command -------------------------------------------------- */
3720 static ssize_t cmos_command_store(struct device *dev,
3721 struct device_attribute *attr,
3722 const char *buf, size_t count)
3723 {
3724 unsigned long cmos_cmd;
3725 int res;
3726
3727 if (parse_strtoul(buf, 21, &cmos_cmd))
3728 return -EINVAL;
3729
3730 res = issue_thinkpad_cmos_command(cmos_cmd);
3731 return (res)? res : count;
3732 }
3733
3734 static struct device_attribute dev_attr_cmos_command =
3735 __ATTR(cmos_command, S_IWUSR, NULL, cmos_command_store);
3736
3737 /* --------------------------------------------------------------------- */
3738
3739 static int __init cmos_init(struct ibm_init_struct *iibm)
3740 {
3741 int res;
3742
3743 vdbg_printk(TPACPI_DBG_INIT,
3744 "initializing cmos commands subdriver\n");
3745
3746 TPACPI_ACPIHANDLE_INIT(cmos);
3747
3748 vdbg_printk(TPACPI_DBG_INIT, "cmos commands are %s\n",
3749 str_supported(cmos_handle != NULL));
3750
3751 res = device_create_file(&tpacpi_pdev->dev, &dev_attr_cmos_command);
3752 if (res)
3753 return res;
3754
3755 return (cmos_handle)? 0 : 1;
3756 }
3757
3758 static void cmos_exit(void)
3759 {
3760 device_remove_file(&tpacpi_pdev->dev, &dev_attr_cmos_command);
3761 }
3762
3763 static int cmos_read(char *p)
3764 {
3765 int len = 0;
3766
3767 /* cmos not supported on 570, 600e/x, 770e, 770x, A21e, A2xm/p,
3768 R30, R31, T20-22, X20-21 */
3769 if (!cmos_handle)
3770 len += sprintf(p + len, "status:\t\tnot supported\n");
3771 else {
3772 len += sprintf(p + len, "status:\t\tsupported\n");
3773 len += sprintf(p + len, "commands:\t<cmd> (<cmd> is 0-21)\n");
3774 }
3775
3776 return len;
3777 }
3778
3779 static int cmos_write(char *buf)
3780 {
3781 char *cmd;
3782 int cmos_cmd, res;
3783
3784 while ((cmd = next_cmd(&buf))) {
3785 if (sscanf(cmd, "%u", &cmos_cmd) == 1 &&
3786 cmos_cmd >= 0 && cmos_cmd <= 21) {
3787 /* cmos_cmd set */
3788 } else
3789 return -EINVAL;
3790
3791 res = issue_thinkpad_cmos_command(cmos_cmd);
3792 if (res)
3793 return res;
3794 }
3795
3796 return 0;
3797 }
3798
3799 static struct ibm_struct cmos_driver_data = {
3800 .name = "cmos",
3801 .read = cmos_read,
3802 .write = cmos_write,
3803 .exit = cmos_exit,
3804 };
3805
3806 /*************************************************************************
3807 * LED subdriver
3808 */
3809
3810 enum led_access_mode {
3811 TPACPI_LED_NONE = 0,
3812 TPACPI_LED_570, /* 570 */
3813 TPACPI_LED_OLD, /* 600e/x, 770e, 770x, A21e, A2xm/p, T20-22, X20-21 */
3814 TPACPI_LED_NEW, /* all others */
3815 };
3816
3817 enum { /* For TPACPI_LED_OLD */
3818 TPACPI_LED_EC_HLCL = 0x0c, /* EC reg to get led to power on */
3819 TPACPI_LED_EC_HLBL = 0x0d, /* EC reg to blink a lit led */
3820 TPACPI_LED_EC_HLMS = 0x0e, /* EC reg to select led to command */
3821 };
3822
3823 enum led_status_t {
3824 TPACPI_LED_OFF = 0,
3825 TPACPI_LED_ON,
3826 TPACPI_LED_BLINK,
3827 };
3828
3829 static enum led_access_mode led_supported;
3830
3831 TPACPI_HANDLE(led, ec, "SLED", /* 570 */
3832 "SYSL", /* 600e/x, 770e, 770x, A21e, A2xm/p, */
3833 /* T20-22, X20-21 */
3834 "LED", /* all others */
3835 ); /* R30, R31 */
3836
3837 #define TPACPI_LED_NUMLEDS 8
3838 static struct tpacpi_led_classdev *tpacpi_leds;
3839 static enum led_status_t tpacpi_led_state_cache[TPACPI_LED_NUMLEDS];
3840 static const char * const tpacpi_led_names[TPACPI_LED_NUMLEDS] = {
3841 /* there's a limit of 19 chars + NULL before 2.6.26 */
3842 "tpacpi::power",
3843 "tpacpi:orange:batt",
3844 "tpacpi:green:batt",
3845 "tpacpi::dock_active",
3846 "tpacpi::bay_active",
3847 "tpacpi::dock_batt",
3848 "tpacpi::unknown_led",
3849 "tpacpi::standby",
3850 };
3851
3852 static int led_get_status(const unsigned int led)
3853 {
3854 int status;
3855 enum led_status_t led_s;
3856
3857 switch (led_supported) {
3858 case TPACPI_LED_570:
3859 if (!acpi_evalf(ec_handle,
3860 &status, "GLED", "dd", 1 << led))
3861 return -EIO;
3862 led_s = (status == 0)?
3863 TPACPI_LED_OFF :
3864 ((status == 1)?
3865 TPACPI_LED_ON :
3866 TPACPI_LED_BLINK);
3867 tpacpi_led_state_cache[led] = led_s;
3868 return led_s;
3869 default:
3870 return -ENXIO;
3871 }
3872
3873 /* not reached */
3874 }
3875
3876 static int led_set_status(const unsigned int led,
3877 const enum led_status_t ledstatus)
3878 {
3879 /* off, on, blink. Index is led_status_t */
3880 static const unsigned int led_sled_arg1[] = { 0, 1, 3 };
3881 static const unsigned int led_led_arg1[] = { 0, 0x80, 0xc0 };
3882
3883 int rc = 0;
3884
3885 switch (led_supported) {
3886 case TPACPI_LED_570:
3887 /* 570 */
3888 if (led > 7)
3889 return -EINVAL;
3890 if (!acpi_evalf(led_handle, NULL, NULL, "vdd",
3891 (1 << led), led_sled_arg1[ledstatus]))
3892 rc = -EIO;
3893 break;
3894 case TPACPI_LED_OLD:
3895 /* 600e/x, 770e, 770x, A21e, A2xm/p, T20-22, X20 */
3896 if (led > 7)
3897 return -EINVAL;
3898 rc = ec_write(TPACPI_LED_EC_HLMS, (1 << led));
3899 if (rc >= 0)
3900 rc = ec_write(TPACPI_LED_EC_HLBL,
3901 (ledstatus == TPACPI_LED_BLINK) << led);
3902 if (rc >= 0)
3903 rc = ec_write(TPACPI_LED_EC_HLCL,
3904 (ledstatus != TPACPI_LED_OFF) << led);
3905 break;
3906 case TPACPI_LED_NEW:
3907 /* all others */
3908 if (!acpi_evalf(led_handle, NULL, NULL, "vdd",
3909 led, led_led_arg1[ledstatus]))
3910 rc = -EIO;
3911 break;
3912 default:
3913 rc = -ENXIO;
3914 }
3915
3916 if (!rc)
3917 tpacpi_led_state_cache[led] = ledstatus;
3918
3919 return rc;
3920 }
3921
3922 static void led_sysfs_set_status(unsigned int led,
3923 enum led_brightness brightness)
3924 {
3925 led_set_status(led,
3926 (brightness == LED_OFF) ?
3927 TPACPI_LED_OFF :
3928 (tpacpi_led_state_cache[led] == TPACPI_LED_BLINK) ?
3929 TPACPI_LED_BLINK : TPACPI_LED_ON);
3930 }
3931
3932 static void led_set_status_worker(struct work_struct *work)
3933 {
3934 struct tpacpi_led_classdev *data =
3935 container_of(work, struct tpacpi_led_classdev, work);
3936
3937 if (likely(tpacpi_lifecycle == TPACPI_LIFE_RUNNING))
3938 led_sysfs_set_status(data->led, data->new_brightness);
3939 }
3940
3941 static void led_sysfs_set(struct led_classdev *led_cdev,
3942 enum led_brightness brightness)
3943 {
3944 struct tpacpi_led_classdev *data = container_of(led_cdev,
3945 struct tpacpi_led_classdev, led_classdev);
3946
3947 data->new_brightness = brightness;
3948 queue_work(tpacpi_wq, &data->work);
3949 }
3950
3951 static int led_sysfs_blink_set(struct led_classdev *led_cdev,
3952 unsigned long *delay_on, unsigned long *delay_off)
3953 {
3954 struct tpacpi_led_classdev *data = container_of(led_cdev,
3955 struct tpacpi_led_classdev, led_classdev);
3956
3957 /* Can we choose the flash rate? */
3958 if (*delay_on == 0 && *delay_off == 0) {
3959 /* yes. set them to the hardware blink rate (1 Hz) */
3960 *delay_on = 500; /* ms */
3961 *delay_off = 500; /* ms */
3962 } else if ((*delay_on != 500) || (*delay_off != 500))
3963 return -EINVAL;
3964
3965 data->new_brightness = TPACPI_LED_BLINK;
3966 queue_work(tpacpi_wq, &data->work);
3967
3968 return 0;
3969 }
3970
3971 static enum led_brightness led_sysfs_get(struct led_classdev *led_cdev)
3972 {
3973 int rc;
3974
3975 struct tpacpi_led_classdev *data = container_of(led_cdev,
3976 struct tpacpi_led_classdev, led_classdev);
3977
3978 rc = led_get_status(data->led);
3979
3980 if (rc == TPACPI_LED_OFF || rc < 0)
3981 rc = LED_OFF; /* no error handling in led class :( */
3982 else
3983 rc = LED_FULL;
3984
3985 return rc;
3986 }
3987
3988 static void led_exit(void)
3989 {
3990 unsigned int i;
3991
3992 for (i = 0; i < TPACPI_LED_NUMLEDS; i++) {
3993 if (tpacpi_leds[i].led_classdev.name)
3994 led_classdev_unregister(&tpacpi_leds[i].led_classdev);
3995 }
3996
3997 kfree(tpacpi_leds);
3998 }
3999
4000 static int __init led_init(struct ibm_init_struct *iibm)
4001 {
4002 unsigned int i;
4003 int rc;
4004
4005 vdbg_printk(TPACPI_DBG_INIT, "initializing LED subdriver\n");
4006
4007 TPACPI_ACPIHANDLE_INIT(led);
4008
4009 if (!led_handle)
4010 /* led not supported on R30, R31 */
4011 led_supported = TPACPI_LED_NONE;
4012 else if (strlencmp(led_path, "SLED") == 0)
4013 /* 570 */
4014 led_supported = TPACPI_LED_570;
4015 else if (strlencmp(led_path, "SYSL") == 0)
4016 /* 600e/x, 770e, 770x, A21e, A2xm/p, T20-22, X20-21 */
4017 led_supported = TPACPI_LED_OLD;
4018 else
4019 /* all others */
4020 led_supported = TPACPI_LED_NEW;
4021
4022 vdbg_printk(TPACPI_DBG_INIT, "LED commands are %s, mode %d\n",
4023 str_supported(led_supported), led_supported);
4024
4025 tpacpi_leds = kzalloc(sizeof(*tpacpi_leds) * TPACPI_LED_NUMLEDS,
4026 GFP_KERNEL);
4027 if (!tpacpi_leds) {
4028 printk(TPACPI_ERR "Out of memory for LED data\n");
4029 return -ENOMEM;
4030 }
4031
4032 for (i = 0; i < TPACPI_LED_NUMLEDS; i++) {
4033 tpacpi_leds[i].led = i;
4034
4035 tpacpi_leds[i].led_classdev.brightness_set = &led_sysfs_set;
4036 tpacpi_leds[i].led_classdev.blink_set = &led_sysfs_blink_set;
4037 if (led_supported == TPACPI_LED_570)
4038 tpacpi_leds[i].led_classdev.brightness_get =
4039 &led_sysfs_get;
4040
4041 tpacpi_leds[i].led_classdev.name = tpacpi_led_names[i];
4042
4043 INIT_WORK(&tpacpi_leds[i].work, led_set_status_worker);
4044
4045 rc = led_classdev_register(&tpacpi_pdev->dev,
4046 &tpacpi_leds[i].led_classdev);
4047 if (rc < 0) {
4048 tpacpi_leds[i].led_classdev.name = NULL;
4049 led_exit();
4050 return rc;
4051 }
4052 }
4053
4054 return (led_supported != TPACPI_LED_NONE)? 0 : 1;
4055 }
4056
4057 #define str_led_status(s) \
4058 ((s) == TPACPI_LED_OFF ? "off" : \
4059 ((s) == TPACPI_LED_ON ? "on" : "blinking"))
4060
4061 static int led_read(char *p)
4062 {
4063 int len = 0;
4064
4065 if (!led_supported) {
4066 len += sprintf(p + len, "status:\t\tnot supported\n");
4067 return len;
4068 }
4069 len += sprintf(p + len, "status:\t\tsupported\n");
4070
4071 if (led_supported == TPACPI_LED_570) {
4072 /* 570 */
4073 int i, status;
4074 for (i = 0; i < 8; i++) {
4075 status = led_get_status(i);
4076 if (status < 0)
4077 return -EIO;
4078 len += sprintf(p + len, "%d:\t\t%s\n",
4079 i, str_led_status(status));
4080 }
4081 }
4082
4083 len += sprintf(p + len, "commands:\t"
4084 "<led> on, <led> off, <led> blink (<led> is 0-7)\n");
4085
4086 return len;
4087 }
4088
4089 static int led_write(char *buf)
4090 {
4091 char *cmd;
4092 int led, rc;
4093 enum led_status_t s;
4094
4095 if (!led_supported)
4096 return -ENODEV;
4097
4098 while ((cmd = next_cmd(&buf))) {
4099 if (sscanf(cmd, "%d", &led) != 1 || led < 0 || led > 7)
4100 return -EINVAL;
4101
4102 if (strstr(cmd, "off")) {
4103 s = TPACPI_LED_OFF;
4104 } else if (strstr(cmd, "on")) {
4105 s = TPACPI_LED_ON;
4106 } else if (strstr(cmd, "blink")) {
4107 s = TPACPI_LED_BLINK;
4108 } else {
4109 return -EINVAL;
4110 }
4111
4112 rc = led_set_status(led, s);
4113 if (rc < 0)
4114 return rc;
4115 }
4116
4117 return 0;
4118 }
4119
4120 static struct ibm_struct led_driver_data = {
4121 .name = "led",
4122 .read = led_read,
4123 .write = led_write,
4124 .exit = led_exit,
4125 };
4126
4127 /*************************************************************************
4128 * Beep subdriver
4129 */
4130
4131 TPACPI_HANDLE(beep, ec, "BEEP"); /* all except R30, R31 */
4132
4133 static int __init beep_init(struct ibm_init_struct *iibm)
4134 {
4135 vdbg_printk(TPACPI_DBG_INIT, "initializing beep subdriver\n");
4136
4137 TPACPI_ACPIHANDLE_INIT(beep);
4138
4139 vdbg_printk(TPACPI_DBG_INIT, "beep is %s\n",
4140 str_supported(beep_handle != NULL));
4141
4142 return (beep_handle)? 0 : 1;
4143 }
4144
4145 static int beep_read(char *p)
4146 {
4147 int len = 0;
4148
4149 if (!beep_handle)
4150 len += sprintf(p + len, "status:\t\tnot supported\n");
4151 else {
4152 len += sprintf(p + len, "status:\t\tsupported\n");
4153 len += sprintf(p + len, "commands:\t<cmd> (<cmd> is 0-17)\n");
4154 }
4155
4156 return len;
4157 }
4158
4159 static int beep_write(char *buf)
4160 {
4161 char *cmd;
4162 int beep_cmd;
4163
4164 if (!beep_handle)
4165 return -ENODEV;
4166
4167 while ((cmd = next_cmd(&buf))) {
4168 if (sscanf(cmd, "%u", &beep_cmd) == 1 &&
4169 beep_cmd >= 0 && beep_cmd <= 17) {
4170 /* beep_cmd set */
4171 } else
4172 return -EINVAL;
4173 if (!acpi_evalf(beep_handle, NULL, NULL, "vdd", beep_cmd, 0))
4174 return -EIO;
4175 }
4176
4177 return 0;
4178 }
4179
4180 static struct ibm_struct beep_driver_data = {
4181 .name = "beep",
4182 .read = beep_read,
4183 .write = beep_write,
4184 };
4185
4186 /*************************************************************************
4187 * Thermal subdriver
4188 */
4189
4190 enum thermal_access_mode {
4191 TPACPI_THERMAL_NONE = 0, /* No thermal support */
4192 TPACPI_THERMAL_ACPI_TMP07, /* Use ACPI TMP0-7 */
4193 TPACPI_THERMAL_ACPI_UPDT, /* Use ACPI TMP0-7 with UPDT */
4194 TPACPI_THERMAL_TPEC_8, /* Use ACPI EC regs, 8 sensors */
4195 TPACPI_THERMAL_TPEC_16, /* Use ACPI EC regs, 16 sensors */
4196 };
4197
4198 enum { /* TPACPI_THERMAL_TPEC_* */
4199 TP_EC_THERMAL_TMP0 = 0x78, /* ACPI EC regs TMP 0..7 */
4200 TP_EC_THERMAL_TMP8 = 0xC0, /* ACPI EC regs TMP 8..15 */
4201 TP_EC_THERMAL_TMP_NA = -128, /* ACPI EC sensor not available */
4202 };
4203
4204 #define TPACPI_MAX_THERMAL_SENSORS 16 /* Max thermal sensors supported */
4205 struct ibm_thermal_sensors_struct {
4206 s32 temp[TPACPI_MAX_THERMAL_SENSORS];
4207 };
4208
4209 static enum thermal_access_mode thermal_read_mode;
4210
4211 /* idx is zero-based */
4212 static int thermal_get_sensor(int idx, s32 *value)
4213 {
4214 int t;
4215 s8 tmp;
4216 char tmpi[5];
4217
4218 t = TP_EC_THERMAL_TMP0;
4219
4220 switch (thermal_read_mode) {
4221 #if TPACPI_MAX_THERMAL_SENSORS >= 16
4222 case TPACPI_THERMAL_TPEC_16:
4223 if (idx >= 8 && idx <= 15) {
4224 t = TP_EC_THERMAL_TMP8;
4225 idx -= 8;
4226 }
4227 /* fallthrough */
4228 #endif
4229 case TPACPI_THERMAL_TPEC_8:
4230 if (idx <= 7) {
4231 if (!acpi_ec_read(t + idx, &tmp))
4232 return -EIO;
4233 *value = tmp * 1000;
4234 return 0;
4235 }
4236 break;
4237
4238 case TPACPI_THERMAL_ACPI_UPDT:
4239 if (idx <= 7) {
4240 snprintf(tmpi, sizeof(tmpi), "TMP%c", '0' + idx);
4241 if (!acpi_evalf(ec_handle, NULL, "UPDT", "v"))
4242 return -EIO;
4243 if (!acpi_evalf(ec_handle, &t, tmpi, "d"))
4244 return -EIO;
4245 *value = (t - 2732) * 100;
4246 return 0;
4247 }
4248 break;
4249
4250 case TPACPI_THERMAL_ACPI_TMP07:
4251 if (idx <= 7) {
4252 snprintf(tmpi, sizeof(tmpi), "TMP%c", '0' + idx);
4253 if (!acpi_evalf(ec_handle, &t, tmpi, "d"))
4254 return -EIO;
4255 if (t > 127 || t < -127)
4256 t = TP_EC_THERMAL_TMP_NA;
4257 *value = t * 1000;
4258 return 0;
4259 }
4260 break;
4261
4262 case TPACPI_THERMAL_NONE:
4263 default:
4264 return -ENOSYS;
4265 }
4266
4267 return -EINVAL;
4268 }
4269
4270 static int thermal_get_sensors(struct ibm_thermal_sensors_struct *s)
4271 {
4272 int res, i;
4273 int n;
4274
4275 n = 8;
4276 i = 0;
4277
4278 if (!s)
4279 return -EINVAL;
4280
4281 if (thermal_read_mode == TPACPI_THERMAL_TPEC_16)
4282 n = 16;
4283
4284 for (i = 0 ; i < n; i++) {
4285 res = thermal_get_sensor(i, &s->temp[i]);
4286 if (res)
4287 return res;
4288 }
4289
4290 return n;
4291 }
4292
4293 /* sysfs temp##_input -------------------------------------------------- */
4294
4295 static ssize_t thermal_temp_input_show(struct device *dev,
4296 struct device_attribute *attr,
4297 char *buf)
4298 {
4299 struct sensor_device_attribute *sensor_attr =
4300 to_sensor_dev_attr(attr);
4301 int idx = sensor_attr->index;
4302 s32 value;
4303 int res;
4304
4305 res = thermal_get_sensor(idx, &value);
4306 if (res)
4307 return res;
4308 if (value == TP_EC_THERMAL_TMP_NA * 1000)
4309 return -ENXIO;
4310
4311 return snprintf(buf, PAGE_SIZE, "%d\n", value);
4312 }
4313
4314 #define THERMAL_SENSOR_ATTR_TEMP(_idxA, _idxB) \
4315 SENSOR_ATTR(temp##_idxA##_input, S_IRUGO, \
4316 thermal_temp_input_show, NULL, _idxB)
4317
4318 static struct sensor_device_attribute sensor_dev_attr_thermal_temp_input[] = {
4319 THERMAL_SENSOR_ATTR_TEMP(1, 0),
4320 THERMAL_SENSOR_ATTR_TEMP(2, 1),
4321 THERMAL_SENSOR_ATTR_TEMP(3, 2),
4322 THERMAL_SENSOR_ATTR_TEMP(4, 3),
4323 THERMAL_SENSOR_ATTR_TEMP(5, 4),
4324 THERMAL_SENSOR_ATTR_TEMP(6, 5),
4325 THERMAL_SENSOR_ATTR_TEMP(7, 6),
4326 THERMAL_SENSOR_ATTR_TEMP(8, 7),
4327 THERMAL_SENSOR_ATTR_TEMP(9, 8),
4328 THERMAL_SENSOR_ATTR_TEMP(10, 9),
4329 THERMAL_SENSOR_ATTR_TEMP(11, 10),
4330 THERMAL_SENSOR_ATTR_TEMP(12, 11),
4331 THERMAL_SENSOR_ATTR_TEMP(13, 12),
4332 THERMAL_SENSOR_ATTR_TEMP(14, 13),
4333 THERMAL_SENSOR_ATTR_TEMP(15, 14),
4334 THERMAL_SENSOR_ATTR_TEMP(16, 15),
4335 };
4336
4337 #define THERMAL_ATTRS(X) \
4338 &sensor_dev_attr_thermal_temp_input[X].dev_attr.attr
4339
4340 static struct attribute *thermal_temp_input_attr[] = {
4341 THERMAL_ATTRS(8),
4342 THERMAL_ATTRS(9),
4343 THERMAL_ATTRS(10),
4344 THERMAL_ATTRS(11),
4345 THERMAL_ATTRS(12),
4346 THERMAL_ATTRS(13),
4347 THERMAL_ATTRS(14),
4348 THERMAL_ATTRS(15),
4349 THERMAL_ATTRS(0),
4350 THERMAL_ATTRS(1),
4351 THERMAL_ATTRS(2),
4352 THERMAL_ATTRS(3),
4353 THERMAL_ATTRS(4),
4354 THERMAL_ATTRS(5),
4355 THERMAL_ATTRS(6),
4356 THERMAL_ATTRS(7),
4357 NULL
4358 };
4359
4360 static const struct attribute_group thermal_temp_input16_group = {
4361 .attrs = thermal_temp_input_attr
4362 };
4363
4364 static const struct attribute_group thermal_temp_input8_group = {
4365 .attrs = &thermal_temp_input_attr[8]
4366 };
4367
4368 #undef THERMAL_SENSOR_ATTR_TEMP
4369 #undef THERMAL_ATTRS
4370
4371 /* --------------------------------------------------------------------- */
4372
4373 static int __init thermal_init(struct ibm_init_struct *iibm)
4374 {
4375 u8 t, ta1, ta2;
4376 int i;
4377 int acpi_tmp7;
4378 int res;
4379
4380 vdbg_printk(TPACPI_DBG_INIT, "initializing thermal subdriver\n");
4381
4382 acpi_tmp7 = acpi_evalf(ec_handle, NULL, "TMP7", "qv");
4383
4384 if (thinkpad_id.ec_model) {
4385 /*
4386 * Direct EC access mode: sensors at registers
4387 * 0x78-0x7F, 0xC0-0xC7. Registers return 0x00 for
4388 * non-implemented, thermal sensors return 0x80 when
4389 * not available
4390 */
4391
4392 ta1 = ta2 = 0;
4393 for (i = 0; i < 8; i++) {
4394 if (acpi_ec_read(TP_EC_THERMAL_TMP0 + i, &t)) {
4395 ta1 |= t;
4396 } else {
4397 ta1 = 0;
4398 break;
4399 }
4400 if (acpi_ec_read(TP_EC_THERMAL_TMP8 + i, &t)) {
4401 ta2 |= t;
4402 } else {
4403 ta1 = 0;
4404 break;
4405 }
4406 }
4407 if (ta1 == 0) {
4408 /* This is sheer paranoia, but we handle it anyway */
4409 if (acpi_tmp7) {
4410 printk(TPACPI_ERR
4411 "ThinkPad ACPI EC access misbehaving, "
4412 "falling back to ACPI TMPx access "
4413 "mode\n");
4414 thermal_read_mode = TPACPI_THERMAL_ACPI_TMP07;
4415 } else {
4416 printk(TPACPI_ERR
4417 "ThinkPad ACPI EC access misbehaving, "
4418 "disabling thermal sensors access\n");
4419 thermal_read_mode = TPACPI_THERMAL_NONE;
4420 }
4421 } else {
4422 thermal_read_mode =
4423 (ta2 != 0) ?
4424 TPACPI_THERMAL_TPEC_16 : TPACPI_THERMAL_TPEC_8;
4425 }
4426 } else if (acpi_tmp7) {
4427 if (acpi_evalf(ec_handle, NULL, "UPDT", "qv")) {
4428 /* 600e/x, 770e, 770x */
4429 thermal_read_mode = TPACPI_THERMAL_ACPI_UPDT;
4430 } else {
4431 /* Standard ACPI TMPx access, max 8 sensors */
4432 thermal_read_mode = TPACPI_THERMAL_ACPI_TMP07;
4433 }
4434 } else {
4435 /* temperatures not supported on 570, G4x, R30, R31, R32 */
4436 thermal_read_mode = TPACPI_THERMAL_NONE;
4437 }
4438
4439 vdbg_printk(TPACPI_DBG_INIT, "thermal is %s, mode %d\n",
4440 str_supported(thermal_read_mode != TPACPI_THERMAL_NONE),
4441 thermal_read_mode);
4442
4443 switch (thermal_read_mode) {
4444 case TPACPI_THERMAL_TPEC_16:
4445 res = sysfs_create_group(&tpacpi_sensors_pdev->dev.kobj,
4446 &thermal_temp_input16_group);
4447 if (res)
4448 return res;
4449 break;
4450 case TPACPI_THERMAL_TPEC_8:
4451 case TPACPI_THERMAL_ACPI_TMP07:
4452 case TPACPI_THERMAL_ACPI_UPDT:
4453 res = sysfs_create_group(&tpacpi_sensors_pdev->dev.kobj,
4454 &thermal_temp_input8_group);
4455 if (res)
4456 return res;
4457 break;
4458 case TPACPI_THERMAL_NONE:
4459 default:
4460 return 1;
4461 }
4462
4463 return 0;
4464 }
4465
4466 static void thermal_exit(void)
4467 {
4468 switch (thermal_read_mode) {
4469 case TPACPI_THERMAL_TPEC_16:
4470 sysfs_remove_group(&tpacpi_sensors_pdev->dev.kobj,
4471 &thermal_temp_input16_group);
4472 break;
4473 case TPACPI_THERMAL_TPEC_8:
4474 case TPACPI_THERMAL_ACPI_TMP07:
4475 case TPACPI_THERMAL_ACPI_UPDT:
4476 sysfs_remove_group(&tpacpi_sensors_pdev->dev.kobj,
4477 &thermal_temp_input16_group);
4478 break;
4479 case TPACPI_THERMAL_NONE:
4480 default:
4481 break;
4482 }
4483 }
4484
4485 static int thermal_read(char *p)
4486 {
4487 int len = 0;
4488 int n, i;
4489 struct ibm_thermal_sensors_struct t;
4490
4491 n = thermal_get_sensors(&t);
4492 if (unlikely(n < 0))
4493 return n;
4494
4495 len += sprintf(p + len, "temperatures:\t");
4496
4497 if (n > 0) {
4498 for (i = 0; i < (n - 1); i++)
4499 len += sprintf(p + len, "%d ", t.temp[i] / 1000);
4500 len += sprintf(p + len, "%d\n", t.temp[i] / 1000);
4501 } else
4502 len += sprintf(p + len, "not supported\n");
4503
4504 return len;
4505 }
4506
4507 static struct ibm_struct thermal_driver_data = {
4508 .name = "thermal",
4509 .read = thermal_read,
4510 .exit = thermal_exit,
4511 };
4512
4513 /*************************************************************************
4514 * EC Dump subdriver
4515 */
4516
4517 static u8 ecdump_regs[256];
4518
4519 static int ecdump_read(char *p)
4520 {
4521 int len = 0;
4522 int i, j;
4523 u8 v;
4524
4525 len += sprintf(p + len, "EC "
4526 " +00 +01 +02 +03 +04 +05 +06 +07"
4527 " +08 +09 +0a +0b +0c +0d +0e +0f\n");
4528 for (i = 0; i < 256; i += 16) {
4529 len += sprintf(p + len, "EC 0x%02x:", i);
4530 for (j = 0; j < 16; j++) {
4531 if (!acpi_ec_read(i + j, &v))
4532 break;
4533 if (v != ecdump_regs[i + j])
4534 len += sprintf(p + len, " *%02x", v);
4535 else
4536 len += sprintf(p + len, " %02x", v);
4537 ecdump_regs[i + j] = v;
4538 }
4539 len += sprintf(p + len, "\n");
4540 if (j != 16)
4541 break;
4542 }
4543
4544 /* These are way too dangerous to advertise openly... */
4545 #if 0
4546 len += sprintf(p + len, "commands:\t0x<offset> 0x<value>"
4547 " (<offset> is 00-ff, <value> is 00-ff)\n");
4548 len += sprintf(p + len, "commands:\t0x<offset> <value> "
4549 " (<offset> is 00-ff, <value> is 0-255)\n");
4550 #endif
4551 return len;
4552 }
4553
4554 static int ecdump_write(char *buf)
4555 {
4556 char *cmd;
4557 int i, v;
4558
4559 while ((cmd = next_cmd(&buf))) {
4560 if (sscanf(cmd, "0x%x 0x%x", &i, &v) == 2) {
4561 /* i and v set */
4562 } else if (sscanf(cmd, "0x%x %u", &i, &v) == 2) {
4563 /* i and v set */
4564 } else
4565 return -EINVAL;
4566 if (i >= 0 && i < 256 && v >= 0 && v < 256) {
4567 if (!acpi_ec_write(i, v))
4568 return -EIO;
4569 } else
4570 return -EINVAL;
4571 }
4572
4573 return 0;
4574 }
4575
4576 static struct ibm_struct ecdump_driver_data = {
4577 .name = "ecdump",
4578 .read = ecdump_read,
4579 .write = ecdump_write,
4580 .flags.experimental = 1,
4581 };
4582
4583 /*************************************************************************
4584 * Backlight/brightness subdriver
4585 */
4586
4587 #define TPACPI_BACKLIGHT_DEV_NAME "thinkpad_screen"
4588
4589 enum {
4590 TP_EC_BACKLIGHT = 0x31,
4591
4592 /* TP_EC_BACKLIGHT bitmasks */
4593 TP_EC_BACKLIGHT_LVLMSK = 0x1F,
4594 TP_EC_BACKLIGHT_CMDMSK = 0xE0,
4595 TP_EC_BACKLIGHT_MAPSW = 0x20,
4596 };
4597
4598 static struct backlight_device *ibm_backlight_device;
4599 static int brightness_mode;
4600 static unsigned int brightness_enable = 2; /* 2 = auto, 0 = no, 1 = yes */
4601
4602 static struct mutex brightness_mutex;
4603
4604 /*
4605 * ThinkPads can read brightness from two places: EC 0x31, or
4606 * CMOS NVRAM byte 0x5E, bits 0-3.
4607 *
4608 * EC 0x31 has the following layout
4609 * Bit 7: unknown function
4610 * Bit 6: unknown function
4611 * Bit 5: Z: honour scale changes, NZ: ignore scale changes
4612 * Bit 4: must be set to zero to avoid problems
4613 * Bit 3-0: backlight brightness level
4614 *
4615 * brightness_get_raw returns status data in the EC 0x31 layout
4616 */
4617 static int brightness_get_raw(int *status)
4618 {
4619 u8 lec = 0, lcmos = 0, level = 0;
4620
4621 if (brightness_mode & 1) {
4622 if (!acpi_ec_read(TP_EC_BACKLIGHT, &lec))
4623 return -EIO;
4624 level = lec & TP_EC_BACKLIGHT_LVLMSK;
4625 };
4626 if (brightness_mode & 2) {
4627 lcmos = (nvram_read_byte(TP_NVRAM_ADDR_BRIGHTNESS)
4628 & TP_NVRAM_MASK_LEVEL_BRIGHTNESS)
4629 >> TP_NVRAM_POS_LEVEL_BRIGHTNESS;
4630 lcmos &= (tp_features.bright_16levels)? 0x0f : 0x07;
4631 level = lcmos;
4632 }
4633
4634 if (brightness_mode == 3) {
4635 *status = lec; /* Prefer EC, CMOS is just a backing store */
4636 lec &= TP_EC_BACKLIGHT_LVLMSK;
4637 if (lec == lcmos)
4638 tp_warned.bright_cmos_ec_unsync = 0;
4639 else {
4640 if (!tp_warned.bright_cmos_ec_unsync) {
4641 printk(TPACPI_ERR
4642 "CMOS NVRAM (%u) and EC (%u) do not "
4643 "agree on display brightness level\n",
4644 (unsigned int) lcmos,
4645 (unsigned int) lec);
4646 tp_warned.bright_cmos_ec_unsync = 1;
4647 }
4648 return -EIO;
4649 }
4650 } else {
4651 *status = level;
4652 }
4653
4654 return 0;
4655 }
4656
4657 /* May return EINTR which can always be mapped to ERESTARTSYS */
4658 static int brightness_set(int value)
4659 {
4660 int cmos_cmd, inc, i, res;
4661 int current_value;
4662 int command_bits;
4663
4664 if (value > ((tp_features.bright_16levels)? 15 : 7) ||
4665 value < 0)
4666 return -EINVAL;
4667
4668 res = mutex_lock_interruptible(&brightness_mutex);
4669 if (res < 0)
4670 return res;
4671
4672 res = brightness_get_raw(&current_value);
4673 if (res < 0)
4674 goto errout;
4675
4676 command_bits = current_value & TP_EC_BACKLIGHT_CMDMSK;
4677 current_value &= TP_EC_BACKLIGHT_LVLMSK;
4678
4679 cmos_cmd = value > current_value ?
4680 TP_CMOS_BRIGHTNESS_UP :
4681 TP_CMOS_BRIGHTNESS_DOWN;
4682 inc = (value > current_value)? 1 : -1;
4683
4684 res = 0;
4685 for (i = current_value; i != value; i += inc) {
4686 if ((brightness_mode & 2) &&
4687 issue_thinkpad_cmos_command(cmos_cmd)) {
4688 res = -EIO;
4689 goto errout;
4690 }
4691 if ((brightness_mode & 1) &&
4692 !acpi_ec_write(TP_EC_BACKLIGHT,
4693 (i + inc) | command_bits)) {
4694 res = -EIO;
4695 goto errout;;
4696 }
4697 }
4698
4699 errout:
4700 mutex_unlock(&brightness_mutex);
4701 return res;
4702 }
4703
4704 /* sysfs backlight class ----------------------------------------------- */
4705
4706 static int brightness_update_status(struct backlight_device *bd)
4707 {
4708 /* it is the backlight class's job (caller) to handle
4709 * EINTR and other errors properly */
4710 return brightness_set(
4711 (bd->props.fb_blank == FB_BLANK_UNBLANK &&
4712 bd->props.power == FB_BLANK_UNBLANK) ?
4713 bd->props.brightness : 0);
4714 }
4715
4716 static int brightness_get(struct backlight_device *bd)
4717 {
4718 int status, res;
4719
4720 res = brightness_get_raw(&status);
4721 if (res < 0)
4722 return 0; /* FIXME: teach backlight about error handling */
4723
4724 return status & TP_EC_BACKLIGHT_LVLMSK;
4725 }
4726
4727 static struct backlight_ops ibm_backlight_data = {
4728 .get_brightness = brightness_get,
4729 .update_status = brightness_update_status,
4730 };
4731
4732 /* --------------------------------------------------------------------- */
4733
4734 static int __init brightness_init(struct ibm_init_struct *iibm)
4735 {
4736 int b;
4737
4738 vdbg_printk(TPACPI_DBG_INIT, "initializing brightness subdriver\n");
4739
4740 mutex_init(&brightness_mutex);
4741
4742 /*
4743 * We always attempt to detect acpi support, so as to switch
4744 * Lenovo Vista BIOS to ACPI brightness mode even if we are not
4745 * going to publish a backlight interface
4746 */
4747 b = tpacpi_check_std_acpi_brightness_support();
4748 if (b > 0) {
4749 if (thinkpad_id.vendor == PCI_VENDOR_ID_LENOVO) {
4750 printk(TPACPI_NOTICE
4751 "Lenovo BIOS switched to ACPI backlight "
4752 "control mode\n");
4753 }
4754 if (brightness_enable > 1) {
4755 printk(TPACPI_NOTICE
4756 "standard ACPI backlight interface "
4757 "available, not loading native one...\n");
4758 return 1;
4759 }
4760 }
4761
4762 if (!brightness_enable) {
4763 dbg_printk(TPACPI_DBG_INIT,
4764 "brightness support disabled by "
4765 "module parameter\n");
4766 return 1;
4767 }
4768
4769 if (b > 16) {
4770 printk(TPACPI_ERR
4771 "Unsupported brightness interface, "
4772 "please contact %s\n", TPACPI_MAIL);
4773 return 1;
4774 }
4775 if (b == 16)
4776 tp_features.bright_16levels = 1;
4777
4778 if (!brightness_mode) {
4779 if (thinkpad_id.vendor == PCI_VENDOR_ID_LENOVO)
4780 brightness_mode = 2;
4781 else
4782 brightness_mode = 3;
4783
4784 dbg_printk(TPACPI_DBG_INIT, "selected brightness_mode=%d\n",
4785 brightness_mode);
4786 }
4787
4788 if (brightness_mode > 3)
4789 return -EINVAL;
4790
4791 if (brightness_get_raw(&b) < 0)
4792 return 1;
4793
4794 if (tp_features.bright_16levels)
4795 printk(TPACPI_INFO
4796 "detected a 16-level brightness capable ThinkPad\n");
4797
4798 ibm_backlight_device = backlight_device_register(
4799 TPACPI_BACKLIGHT_DEV_NAME, NULL, NULL,
4800 &ibm_backlight_data);
4801 if (IS_ERR(ibm_backlight_device)) {
4802 printk(TPACPI_ERR "Could not register backlight device\n");
4803 return PTR_ERR(ibm_backlight_device);
4804 }
4805 vdbg_printk(TPACPI_DBG_INIT, "brightness is supported\n");
4806
4807 ibm_backlight_device->props.max_brightness =
4808 (tp_features.bright_16levels)? 15 : 7;
4809 ibm_backlight_device->props.brightness = b & TP_EC_BACKLIGHT_LVLMSK;
4810 backlight_update_status(ibm_backlight_device);
4811
4812 return 0;
4813 }
4814
4815 static void brightness_exit(void)
4816 {
4817 if (ibm_backlight_device) {
4818 vdbg_printk(TPACPI_DBG_EXIT,
4819 "calling backlight_device_unregister()\n");
4820 backlight_device_unregister(ibm_backlight_device);
4821 }
4822 }
4823
4824 static int brightness_read(char *p)
4825 {
4826 int len = 0;
4827 int level;
4828
4829 level = brightness_get(NULL);
4830 if (level < 0) {
4831 len += sprintf(p + len, "level:\t\tunreadable\n");
4832 } else {
4833 len += sprintf(p + len, "level:\t\t%d\n", level);
4834 len += sprintf(p + len, "commands:\tup, down\n");
4835 len += sprintf(p + len, "commands:\tlevel <level>"
4836 " (<level> is 0-%d)\n",
4837 (tp_features.bright_16levels) ? 15 : 7);
4838 }
4839
4840 return len;
4841 }
4842
4843 static int brightness_write(char *buf)
4844 {
4845 int level;
4846 int rc;
4847 char *cmd;
4848 int max_level = (tp_features.bright_16levels) ? 15 : 7;
4849
4850 level = brightness_get(NULL);
4851 if (level < 0)
4852 return level;
4853
4854 while ((cmd = next_cmd(&buf))) {
4855 if (strlencmp(cmd, "up") == 0) {
4856 if (level < max_level)
4857 level++;
4858 } else if (strlencmp(cmd, "down") == 0) {
4859 if (level > 0)
4860 level--;
4861 } else if (sscanf(cmd, "level %d", &level) == 1 &&
4862 level >= 0 && level <= max_level) {
4863 /* new level set */
4864 } else
4865 return -EINVAL;
4866 }
4867
4868 /*
4869 * Now we know what the final level should be, so we try to set it.
4870 * Doing it this way makes the syscall restartable in case of EINTR
4871 */
4872 rc = brightness_set(level);
4873 return (rc == -EINTR)? ERESTARTSYS : rc;
4874 }
4875
4876 static struct ibm_struct brightness_driver_data = {
4877 .name = "brightness",
4878 .read = brightness_read,
4879 .write = brightness_write,
4880 .exit = brightness_exit,
4881 };
4882
4883 /*************************************************************************
4884 * Volume subdriver
4885 */
4886
4887 static int volume_offset = 0x30;
4888
4889 static int volume_read(char *p)
4890 {
4891 int len = 0;
4892 u8 level;
4893
4894 if (!acpi_ec_read(volume_offset, &level)) {
4895 len += sprintf(p + len, "level:\t\tunreadable\n");
4896 } else {
4897 len += sprintf(p + len, "level:\t\t%d\n", level & 0xf);
4898 len += sprintf(p + len, "mute:\t\t%s\n", onoff(level, 6));
4899 len += sprintf(p + len, "commands:\tup, down, mute\n");
4900 len += sprintf(p + len, "commands:\tlevel <level>"
4901 " (<level> is 0-15)\n");
4902 }
4903
4904 return len;
4905 }
4906
4907 static int volume_write(char *buf)
4908 {
4909 int cmos_cmd, inc, i;
4910 u8 level, mute;
4911 int new_level, new_mute;
4912 char *cmd;
4913
4914 while ((cmd = next_cmd(&buf))) {
4915 if (!acpi_ec_read(volume_offset, &level))
4916 return -EIO;
4917 new_mute = mute = level & 0x40;
4918 new_level = level = level & 0xf;
4919
4920 if (strlencmp(cmd, "up") == 0) {
4921 if (mute)
4922 new_mute = 0;
4923 else
4924 new_level = level == 15 ? 15 : level + 1;
4925 } else if (strlencmp(cmd, "down") == 0) {
4926 if (mute)
4927 new_mute = 0;
4928 else
4929 new_level = level == 0 ? 0 : level - 1;
4930 } else if (sscanf(cmd, "level %d", &new_level) == 1 &&
4931 new_level >= 0 && new_level <= 15) {
4932 /* new_level set */
4933 } else if (strlencmp(cmd, "mute") == 0) {
4934 new_mute = 0x40;
4935 } else
4936 return -EINVAL;
4937
4938 if (new_level != level) {
4939 /* mute doesn't change */
4940
4941 cmos_cmd = (new_level > level) ?
4942 TP_CMOS_VOLUME_UP : TP_CMOS_VOLUME_DOWN;
4943 inc = new_level > level ? 1 : -1;
4944
4945 if (mute && (issue_thinkpad_cmos_command(cmos_cmd) ||
4946 !acpi_ec_write(volume_offset, level)))
4947 return -EIO;
4948
4949 for (i = level; i != new_level; i += inc)
4950 if (issue_thinkpad_cmos_command(cmos_cmd) ||
4951 !acpi_ec_write(volume_offset, i + inc))
4952 return -EIO;
4953
4954 if (mute &&
4955 (issue_thinkpad_cmos_command(TP_CMOS_VOLUME_MUTE) ||
4956 !acpi_ec_write(volume_offset, new_level + mute))) {
4957 return -EIO;
4958 }
4959 }
4960
4961 if (new_mute != mute) {
4962 /* level doesn't change */
4963
4964 cmos_cmd = (new_mute) ?
4965 TP_CMOS_VOLUME_MUTE : TP_CMOS_VOLUME_UP;
4966
4967 if (issue_thinkpad_cmos_command(cmos_cmd) ||
4968 !acpi_ec_write(volume_offset, level + new_mute))
4969 return -EIO;
4970 }
4971 }
4972
4973 return 0;
4974 }
4975
4976 static struct ibm_struct volume_driver_data = {
4977 .name = "volume",
4978 .read = volume_read,
4979 .write = volume_write,
4980 };
4981
4982 /*************************************************************************
4983 * Fan subdriver
4984 */
4985
4986 /*
4987 * FAN ACCESS MODES
4988 *
4989 * TPACPI_FAN_RD_ACPI_GFAN:
4990 * ACPI GFAN method: returns fan level
4991 *
4992 * see TPACPI_FAN_WR_ACPI_SFAN
4993 * EC 0x2f (HFSP) not available if GFAN exists
4994 *
4995 * TPACPI_FAN_WR_ACPI_SFAN:
4996 * ACPI SFAN method: sets fan level, 0 (stop) to 7 (max)
4997 *
4998 * EC 0x2f (HFSP) might be available *for reading*, but do not use
4999 * it for writing.
5000 *
5001 * TPACPI_FAN_WR_TPEC:
5002 * ThinkPad EC register 0x2f (HFSP): fan control loop mode
5003 * Supported on almost all ThinkPads
5004 *
5005 * Fan speed changes of any sort (including those caused by the
5006 * disengaged mode) are usually done slowly by the firmware as the
5007 * maximum ammount of fan duty cycle change per second seems to be
5008 * limited.
5009 *
5010 * Reading is not available if GFAN exists.
5011 * Writing is not available if SFAN exists.
5012 *
5013 * Bits
5014 * 7 automatic mode engaged;
5015 * (default operation mode of the ThinkPad)
5016 * fan level is ignored in this mode.
5017 * 6 full speed mode (takes precedence over bit 7);
5018 * not available on all thinkpads. May disable
5019 * the tachometer while the fan controller ramps up
5020 * the speed (which can take up to a few *minutes*).
5021 * Speeds up fan to 100% duty-cycle, which is far above
5022 * the standard RPM levels. It is not impossible that
5023 * it could cause hardware damage.
5024 * 5-3 unused in some models. Extra bits for fan level
5025 * in others, but still useless as all values above
5026 * 7 map to the same speed as level 7 in these models.
5027 * 2-0 fan level (0..7 usually)
5028 * 0x00 = stop
5029 * 0x07 = max (set when temperatures critical)
5030 * Some ThinkPads may have other levels, see
5031 * TPACPI_FAN_WR_ACPI_FANS (X31/X40/X41)
5032 *
5033 * FIRMWARE BUG: on some models, EC 0x2f might not be initialized at
5034 * boot. Apparently the EC does not intialize it, so unless ACPI DSDT
5035 * does so, its initial value is meaningless (0x07).
5036 *
5037 * For firmware bugs, refer to:
5038 * http://thinkwiki.org/wiki/Embedded_Controller_Firmware#Firmware_Issues
5039 *
5040 * ----
5041 *
5042 * ThinkPad EC register 0x84 (LSB), 0x85 (MSB):
5043 * Main fan tachometer reading (in RPM)
5044 *
5045 * This register is present on all ThinkPads with a new-style EC, and
5046 * it is known not to be present on the A21m/e, and T22, as there is
5047 * something else in offset 0x84 according to the ACPI DSDT. Other
5048 * ThinkPads from this same time period (and earlier) probably lack the
5049 * tachometer as well.
5050 *
5051 * Unfortunately a lot of ThinkPads with new-style ECs but whose firwmare
5052 * was never fixed by IBM to report the EC firmware version string
5053 * probably support the tachometer (like the early X models), so
5054 * detecting it is quite hard. We need more data to know for sure.
5055 *
5056 * FIRMWARE BUG: always read 0x84 first, otherwise incorrect readings
5057 * might result.
5058 *
5059 * FIRMWARE BUG: may go stale while the EC is switching to full speed
5060 * mode.
5061 *
5062 * For firmware bugs, refer to:
5063 * http://thinkwiki.org/wiki/Embedded_Controller_Firmware#Firmware_Issues
5064 *
5065 * TPACPI_FAN_WR_ACPI_FANS:
5066 * ThinkPad X31, X40, X41. Not available in the X60.
5067 *
5068 * FANS ACPI handle: takes three arguments: low speed, medium speed,
5069 * high speed. ACPI DSDT seems to map these three speeds to levels
5070 * as follows: STOP LOW LOW MED MED HIGH HIGH HIGH HIGH
5071 * (this map is stored on FAN0..FAN8 as "0,1,1,2,2,3,3,3,3")
5072 *
5073 * The speeds are stored on handles
5074 * (FANA:FAN9), (FANC:FANB), (FANE:FAND).
5075 *
5076 * There are three default speed sets, acessible as handles:
5077 * FS1L,FS1M,FS1H; FS2L,FS2M,FS2H; FS3L,FS3M,FS3H
5078 *
5079 * ACPI DSDT switches which set is in use depending on various
5080 * factors.
5081 *
5082 * TPACPI_FAN_WR_TPEC is also available and should be used to
5083 * command the fan. The X31/X40/X41 seems to have 8 fan levels,
5084 * but the ACPI tables just mention level 7.
5085 */
5086
5087 enum { /* Fan control constants */
5088 fan_status_offset = 0x2f, /* EC register 0x2f */
5089 fan_rpm_offset = 0x84, /* EC register 0x84: LSB, 0x85 MSB (RPM)
5090 * 0x84 must be read before 0x85 */
5091
5092 TP_EC_FAN_FULLSPEED = 0x40, /* EC fan mode: full speed */
5093 TP_EC_FAN_AUTO = 0x80, /* EC fan mode: auto fan control */
5094
5095 TPACPI_FAN_LAST_LEVEL = 0x100, /* Use cached last-seen fan level */
5096 };
5097
5098 enum fan_status_access_mode {
5099 TPACPI_FAN_NONE = 0, /* No fan status or control */
5100 TPACPI_FAN_RD_ACPI_GFAN, /* Use ACPI GFAN */
5101 TPACPI_FAN_RD_TPEC, /* Use ACPI EC regs 0x2f, 0x84-0x85 */
5102 };
5103
5104 enum fan_control_access_mode {
5105 TPACPI_FAN_WR_NONE = 0, /* No fan control */
5106 TPACPI_FAN_WR_ACPI_SFAN, /* Use ACPI SFAN */
5107 TPACPI_FAN_WR_TPEC, /* Use ACPI EC reg 0x2f */
5108 TPACPI_FAN_WR_ACPI_FANS, /* Use ACPI FANS and EC reg 0x2f */
5109 };
5110
5111 enum fan_control_commands {
5112 TPACPI_FAN_CMD_SPEED = 0x0001, /* speed command */
5113 TPACPI_FAN_CMD_LEVEL = 0x0002, /* level command */
5114 TPACPI_FAN_CMD_ENABLE = 0x0004, /* enable/disable cmd,
5115 * and also watchdog cmd */
5116 };
5117
5118 static int fan_control_allowed;
5119
5120 static enum fan_status_access_mode fan_status_access_mode;
5121 static enum fan_control_access_mode fan_control_access_mode;
5122 static enum fan_control_commands fan_control_commands;
5123
5124 static u8 fan_control_initial_status;
5125 static u8 fan_control_desired_level;
5126 static int fan_watchdog_maxinterval;
5127
5128 static struct mutex fan_mutex;
5129
5130 static void fan_watchdog_fire(struct work_struct *ignored);
5131 static DECLARE_DELAYED_WORK(fan_watchdog_task, fan_watchdog_fire);
5132
5133 TPACPI_HANDLE(fans, ec, "FANS"); /* X31, X40, X41 */
5134 TPACPI_HANDLE(gfan, ec, "GFAN", /* 570 */
5135 "\\FSPD", /* 600e/x, 770e, 770x */
5136 ); /* all others */
5137 TPACPI_HANDLE(sfan, ec, "SFAN", /* 570 */
5138 "JFNS", /* 770x-JL */
5139 ); /* all others */
5140
5141 /*
5142 * Call with fan_mutex held
5143 */
5144 static void fan_update_desired_level(u8 status)
5145 {
5146 if ((status &
5147 (TP_EC_FAN_AUTO | TP_EC_FAN_FULLSPEED)) == 0) {
5148 if (status > 7)
5149 fan_control_desired_level = 7;
5150 else
5151 fan_control_desired_level = status;
5152 }
5153 }
5154
5155 static int fan_get_status(u8 *status)
5156 {
5157 u8 s;
5158
5159 /* TODO:
5160 * Add TPACPI_FAN_RD_ACPI_FANS ? */
5161
5162 switch (fan_status_access_mode) {
5163 case TPACPI_FAN_RD_ACPI_GFAN:
5164 /* 570, 600e/x, 770e, 770x */
5165
5166 if (unlikely(!acpi_evalf(gfan_handle, &s, NULL, "d")))
5167 return -EIO;
5168
5169 if (likely(status))
5170 *status = s & 0x07;
5171
5172 break;
5173
5174 case TPACPI_FAN_RD_TPEC:
5175 /* all except 570, 600e/x, 770e, 770x */
5176 if (unlikely(!acpi_ec_read(fan_status_offset, &s)))
5177 return -EIO;
5178
5179 if (likely(status))
5180 *status = s;
5181
5182 break;
5183
5184 default:
5185 return -ENXIO;
5186 }
5187
5188 return 0;
5189 }
5190
5191 static int fan_get_status_safe(u8 *status)
5192 {
5193 int rc;
5194 u8 s;
5195
5196 if (mutex_lock_interruptible(&fan_mutex))
5197 return -ERESTARTSYS;
5198 rc = fan_get_status(&s);
5199 if (!rc)
5200 fan_update_desired_level(s);
5201 mutex_unlock(&fan_mutex);
5202
5203 if (status)
5204 *status = s;
5205
5206 return rc;
5207 }
5208
5209 static int fan_get_speed(unsigned int *speed)
5210 {
5211 u8 hi, lo;
5212
5213 switch (fan_status_access_mode) {
5214 case TPACPI_FAN_RD_TPEC:
5215 /* all except 570, 600e/x, 770e, 770x */
5216 if (unlikely(!acpi_ec_read(fan_rpm_offset, &lo) ||
5217 !acpi_ec_read(fan_rpm_offset + 1, &hi)))
5218 return -EIO;
5219
5220 if (likely(speed))
5221 *speed = (hi << 8) | lo;
5222
5223 break;
5224
5225 default:
5226 return -ENXIO;
5227 }
5228
5229 return 0;
5230 }
5231
5232 static int fan_set_level(int level)
5233 {
5234 if (!fan_control_allowed)
5235 return -EPERM;
5236
5237 switch (fan_control_access_mode) {
5238 case TPACPI_FAN_WR_ACPI_SFAN:
5239 if (level >= 0 && level <= 7) {
5240 if (!acpi_evalf(sfan_handle, NULL, NULL, "vd", level))
5241 return -EIO;
5242 } else
5243 return -EINVAL;
5244 break;
5245
5246 case TPACPI_FAN_WR_ACPI_FANS:
5247 case TPACPI_FAN_WR_TPEC:
5248 if ((level != TP_EC_FAN_AUTO) &&
5249 (level != TP_EC_FAN_FULLSPEED) &&
5250 ((level < 0) || (level > 7)))
5251 return -EINVAL;
5252
5253 /* safety net should the EC not support AUTO
5254 * or FULLSPEED mode bits and just ignore them */
5255 if (level & TP_EC_FAN_FULLSPEED)
5256 level |= 7; /* safety min speed 7 */
5257 else if (level & TP_EC_FAN_AUTO)
5258 level |= 4; /* safety min speed 4 */
5259
5260 if (!acpi_ec_write(fan_status_offset, level))
5261 return -EIO;
5262 else
5263 tp_features.fan_ctrl_status_undef = 0;
5264 break;
5265
5266 default:
5267 return -ENXIO;
5268 }
5269 return 0;
5270 }
5271
5272 static int fan_set_level_safe(int level)
5273 {
5274 int rc;
5275
5276 if (!fan_control_allowed)
5277 return -EPERM;
5278
5279 if (mutex_lock_interruptible(&fan_mutex))
5280 return -ERESTARTSYS;
5281
5282 if (level == TPACPI_FAN_LAST_LEVEL)
5283 level = fan_control_desired_level;
5284
5285 rc = fan_set_level(level);
5286 if (!rc)
5287 fan_update_desired_level(level);
5288
5289 mutex_unlock(&fan_mutex);
5290 return rc;
5291 }
5292
5293 static int fan_set_enable(void)
5294 {
5295 u8 s;
5296 int rc;
5297
5298 if (!fan_control_allowed)
5299 return -EPERM;
5300
5301 if (mutex_lock_interruptible(&fan_mutex))
5302 return -ERESTARTSYS;
5303
5304 switch (fan_control_access_mode) {
5305 case TPACPI_FAN_WR_ACPI_FANS:
5306 case TPACPI_FAN_WR_TPEC:
5307 rc = fan_get_status(&s);
5308 if (rc < 0)
5309 break;
5310
5311 /* Don't go out of emergency fan mode */
5312 if (s != 7) {
5313 s &= 0x07;
5314 s |= TP_EC_FAN_AUTO | 4; /* min fan speed 4 */
5315 }
5316
5317 if (!acpi_ec_write(fan_status_offset, s))
5318 rc = -EIO;
5319 else {
5320 tp_features.fan_ctrl_status_undef = 0;
5321 rc = 0;
5322 }
5323 break;
5324
5325 case TPACPI_FAN_WR_ACPI_SFAN:
5326 rc = fan_get_status(&s);
5327 if (rc < 0)
5328 break;
5329
5330 s &= 0x07;
5331
5332 /* Set fan to at least level 4 */
5333 s |= 4;
5334
5335 if (!acpi_evalf(sfan_handle, NULL, NULL, "vd", s))
5336 rc = -EIO;
5337 else
5338 rc = 0;
5339 break;
5340
5341 default:
5342 rc = -ENXIO;
5343 }
5344
5345 mutex_unlock(&fan_mutex);
5346 return rc;
5347 }
5348
5349 static int fan_set_disable(void)
5350 {
5351 int rc;
5352
5353 if (!fan_control_allowed)
5354 return -EPERM;
5355
5356 if (mutex_lock_interruptible(&fan_mutex))
5357 return -ERESTARTSYS;
5358
5359 rc = 0;
5360 switch (fan_control_access_mode) {
5361 case TPACPI_FAN_WR_ACPI_FANS:
5362 case TPACPI_FAN_WR_TPEC:
5363 if (!acpi_ec_write(fan_status_offset, 0x00))
5364 rc = -EIO;
5365 else {
5366 fan_control_desired_level = 0;
5367 tp_features.fan_ctrl_status_undef = 0;
5368 }
5369 break;
5370
5371 case TPACPI_FAN_WR_ACPI_SFAN:
5372 if (!acpi_evalf(sfan_handle, NULL, NULL, "vd", 0x00))
5373 rc = -EIO;
5374 else
5375 fan_control_desired_level = 0;
5376 break;
5377
5378 default:
5379 rc = -ENXIO;
5380 }
5381
5382
5383 mutex_unlock(&fan_mutex);
5384 return rc;
5385 }
5386
5387 static int fan_set_speed(int speed)
5388 {
5389 int rc;
5390
5391 if (!fan_control_allowed)
5392 return -EPERM;
5393
5394 if (mutex_lock_interruptible(&fan_mutex))
5395 return -ERESTARTSYS;
5396
5397 rc = 0;
5398 switch (fan_control_access_mode) {
5399 case TPACPI_FAN_WR_ACPI_FANS:
5400 if (speed >= 0 && speed <= 65535) {
5401 if (!acpi_evalf(fans_handle, NULL, NULL, "vddd",
5402 speed, speed, speed))
5403 rc = -EIO;
5404 } else
5405 rc = -EINVAL;
5406 break;
5407
5408 default:
5409 rc = -ENXIO;
5410 }
5411
5412 mutex_unlock(&fan_mutex);
5413 return rc;
5414 }
5415
5416 static void fan_watchdog_reset(void)
5417 {
5418 static int fan_watchdog_active;
5419
5420 if (fan_control_access_mode == TPACPI_FAN_WR_NONE)
5421 return;
5422
5423 if (fan_watchdog_active)
5424 cancel_delayed_work(&fan_watchdog_task);
5425
5426 if (fan_watchdog_maxinterval > 0 &&
5427 tpacpi_lifecycle != TPACPI_LIFE_EXITING) {
5428 fan_watchdog_active = 1;
5429 if (!queue_delayed_work(tpacpi_wq, &fan_watchdog_task,
5430 msecs_to_jiffies(fan_watchdog_maxinterval
5431 * 1000))) {
5432 printk(TPACPI_ERR
5433 "failed to queue the fan watchdog, "
5434 "watchdog will not trigger\n");
5435 }
5436 } else
5437 fan_watchdog_active = 0;
5438 }
5439
5440 static void fan_watchdog_fire(struct work_struct *ignored)
5441 {
5442 int rc;
5443
5444 if (tpacpi_lifecycle != TPACPI_LIFE_RUNNING)
5445 return;
5446
5447 printk(TPACPI_NOTICE "fan watchdog: enabling fan\n");
5448 rc = fan_set_enable();
5449 if (rc < 0) {
5450 printk(TPACPI_ERR "fan watchdog: error %d while enabling fan, "
5451 "will try again later...\n", -rc);
5452 /* reschedule for later */
5453 fan_watchdog_reset();
5454 }
5455 }
5456
5457 /*
5458 * SYSFS fan layout: hwmon compatible (device)
5459 *
5460 * pwm*_enable:
5461 * 0: "disengaged" mode
5462 * 1: manual mode
5463 * 2: native EC "auto" mode (recommended, hardware default)
5464 *
5465 * pwm*: set speed in manual mode, ignored otherwise.
5466 * 0 is level 0; 255 is level 7. Intermediate points done with linear
5467 * interpolation.
5468 *
5469 * fan*_input: tachometer reading, RPM
5470 *
5471 *
5472 * SYSFS fan layout: extensions
5473 *
5474 * fan_watchdog (driver):
5475 * fan watchdog interval in seconds, 0 disables (default), max 120
5476 */
5477
5478 /* sysfs fan pwm1_enable ----------------------------------------------- */
5479 static ssize_t fan_pwm1_enable_show(struct device *dev,
5480 struct device_attribute *attr,
5481 char *buf)
5482 {
5483 int res, mode;
5484 u8 status;
5485
5486 res = fan_get_status_safe(&status);
5487 if (res)
5488 return res;
5489
5490 if (unlikely(tp_features.fan_ctrl_status_undef)) {
5491 if (status != fan_control_initial_status) {
5492 tp_features.fan_ctrl_status_undef = 0;
5493 } else {
5494 /* Return most likely status. In fact, it
5495 * might be the only possible status */
5496 status = TP_EC_FAN_AUTO;
5497 }
5498 }
5499
5500 if (status & TP_EC_FAN_FULLSPEED) {
5501 mode = 0;
5502 } else if (status & TP_EC_FAN_AUTO) {
5503 mode = 2;
5504 } else
5505 mode = 1;
5506
5507 return snprintf(buf, PAGE_SIZE, "%d\n", mode);
5508 }
5509
5510 static ssize_t fan_pwm1_enable_store(struct device *dev,
5511 struct device_attribute *attr,
5512 const char *buf, size_t count)
5513 {
5514 unsigned long t;
5515 int res, level;
5516
5517 if (parse_strtoul(buf, 2, &t))
5518 return -EINVAL;
5519
5520 switch (t) {
5521 case 0:
5522 level = TP_EC_FAN_FULLSPEED;
5523 break;
5524 case 1:
5525 level = TPACPI_FAN_LAST_LEVEL;
5526 break;
5527 case 2:
5528 level = TP_EC_FAN_AUTO;
5529 break;
5530 case 3:
5531 /* reserved for software-controlled auto mode */
5532 return -ENOSYS;
5533 default:
5534 return -EINVAL;
5535 }
5536
5537 res = fan_set_level_safe(level);
5538 if (res == -ENXIO)
5539 return -EINVAL;
5540 else if (res < 0)
5541 return res;
5542
5543 fan_watchdog_reset();
5544
5545 return count;
5546 }
5547
5548 static struct device_attribute dev_attr_fan_pwm1_enable =
5549 __ATTR(pwm1_enable, S_IWUSR | S_IRUGO,
5550 fan_pwm1_enable_show, fan_pwm1_enable_store);
5551
5552 /* sysfs fan pwm1 ------------------------------------------------------ */
5553 static ssize_t fan_pwm1_show(struct device *dev,
5554 struct device_attribute *attr,
5555 char *buf)
5556 {
5557 int res;
5558 u8 status;
5559
5560 res = fan_get_status_safe(&status);
5561 if (res)
5562 return res;
5563
5564 if (unlikely(tp_features.fan_ctrl_status_undef)) {
5565 if (status != fan_control_initial_status) {
5566 tp_features.fan_ctrl_status_undef = 0;
5567 } else {
5568 status = TP_EC_FAN_AUTO;
5569 }
5570 }
5571
5572 if ((status &
5573 (TP_EC_FAN_AUTO | TP_EC_FAN_FULLSPEED)) != 0)
5574 status = fan_control_desired_level;
5575
5576 if (status > 7)
5577 status = 7;
5578
5579 return snprintf(buf, PAGE_SIZE, "%u\n", (status * 255) / 7);
5580 }
5581
5582 static ssize_t fan_pwm1_store(struct device *dev,
5583 struct device_attribute *attr,
5584 const char *buf, size_t count)
5585 {
5586 unsigned long s;
5587 int rc;
5588 u8 status, newlevel;
5589
5590 if (parse_strtoul(buf, 255, &s))
5591 return -EINVAL;
5592
5593 /* scale down from 0-255 to 0-7 */
5594 newlevel = (s >> 5) & 0x07;
5595
5596 if (mutex_lock_interruptible(&fan_mutex))
5597 return -ERESTARTSYS;
5598
5599 rc = fan_get_status(&status);
5600 if (!rc && (status &
5601 (TP_EC_FAN_AUTO | TP_EC_FAN_FULLSPEED)) == 0) {
5602 rc = fan_set_level(newlevel);
5603 if (rc == -ENXIO)
5604 rc = -EINVAL;
5605 else if (!rc) {
5606 fan_update_desired_level(newlevel);
5607 fan_watchdog_reset();
5608 }
5609 }
5610
5611 mutex_unlock(&fan_mutex);
5612 return (rc)? rc : count;
5613 }
5614
5615 static struct device_attribute dev_attr_fan_pwm1 =
5616 __ATTR(pwm1, S_IWUSR | S_IRUGO,
5617 fan_pwm1_show, fan_pwm1_store);
5618
5619 /* sysfs fan fan1_input ------------------------------------------------ */
5620 static ssize_t fan_fan1_input_show(struct device *dev,
5621 struct device_attribute *attr,
5622 char *buf)
5623 {
5624 int res;
5625 unsigned int speed;
5626
5627 res = fan_get_speed(&speed);
5628 if (res < 0)
5629 return res;
5630
5631 return snprintf(buf, PAGE_SIZE, "%u\n", speed);
5632 }
5633
5634 static struct device_attribute dev_attr_fan_fan1_input =
5635 __ATTR(fan1_input, S_IRUGO,
5636 fan_fan1_input_show, NULL);
5637
5638 /* sysfs fan fan_watchdog (hwmon driver) ------------------------------- */
5639 static ssize_t fan_fan_watchdog_show(struct device_driver *drv,
5640 char *buf)
5641 {
5642 return snprintf(buf, PAGE_SIZE, "%u\n", fan_watchdog_maxinterval);
5643 }
5644
5645 static ssize_t fan_fan_watchdog_store(struct device_driver *drv,
5646 const char *buf, size_t count)
5647 {
5648 unsigned long t;
5649
5650 if (parse_strtoul(buf, 120, &t))
5651 return -EINVAL;
5652
5653 if (!fan_control_allowed)
5654 return -EPERM;
5655
5656 fan_watchdog_maxinterval = t;
5657 fan_watchdog_reset();
5658
5659 return count;
5660 }
5661
5662 static DRIVER_ATTR(fan_watchdog, S_IWUSR | S_IRUGO,
5663 fan_fan_watchdog_show, fan_fan_watchdog_store);
5664
5665 /* --------------------------------------------------------------------- */
5666 static struct attribute *fan_attributes[] = {
5667 &dev_attr_fan_pwm1_enable.attr, &dev_attr_fan_pwm1.attr,
5668 &dev_attr_fan_fan1_input.attr,
5669 NULL
5670 };
5671
5672 static const struct attribute_group fan_attr_group = {
5673 .attrs = fan_attributes,
5674 };
5675
5676 static int __init fan_init(struct ibm_init_struct *iibm)
5677 {
5678 int rc;
5679
5680 vdbg_printk(TPACPI_DBG_INIT, "initializing fan subdriver\n");
5681
5682 mutex_init(&fan_mutex);
5683 fan_status_access_mode = TPACPI_FAN_NONE;
5684 fan_control_access_mode = TPACPI_FAN_WR_NONE;
5685 fan_control_commands = 0;
5686 fan_watchdog_maxinterval = 0;
5687 tp_features.fan_ctrl_status_undef = 0;
5688 fan_control_desired_level = 7;
5689
5690 TPACPI_ACPIHANDLE_INIT(fans);
5691 TPACPI_ACPIHANDLE_INIT(gfan);
5692 TPACPI_ACPIHANDLE_INIT(sfan);
5693
5694 if (gfan_handle) {
5695 /* 570, 600e/x, 770e, 770x */
5696 fan_status_access_mode = TPACPI_FAN_RD_ACPI_GFAN;
5697 } else {
5698 /* all other ThinkPads: note that even old-style
5699 * ThinkPad ECs supports the fan control register */
5700 if (likely(acpi_ec_read(fan_status_offset,
5701 &fan_control_initial_status))) {
5702 fan_status_access_mode = TPACPI_FAN_RD_TPEC;
5703
5704 /* In some ThinkPads, neither the EC nor the ACPI
5705 * DSDT initialize the fan status, and it ends up
5706 * being set to 0x07 when it *could* be either
5707 * 0x07 or 0x80.
5708 *
5709 * Enable for TP-1Y (T43), TP-78 (R51e),
5710 * TP-76 (R52), TP-70 (T43, R52), which are known
5711 * to be buggy. */
5712 if (fan_control_initial_status == 0x07) {
5713 switch (thinkpad_id.ec_model) {
5714 case 0x5931: /* TP-1Y */
5715 case 0x3837: /* TP-78 */
5716 case 0x3637: /* TP-76 */
5717 case 0x3037: /* TP-70 */
5718 printk(TPACPI_NOTICE
5719 "fan_init: initial fan status "
5720 "is unknown, assuming it is "
5721 "in auto mode\n");
5722 tp_features.fan_ctrl_status_undef = 1;
5723 ;;
5724 }
5725 }
5726 } else {
5727 printk(TPACPI_ERR
5728 "ThinkPad ACPI EC access misbehaving, "
5729 "fan status and control unavailable\n");
5730 return 1;
5731 }
5732 }
5733
5734 if (sfan_handle) {
5735 /* 570, 770x-JL */
5736 fan_control_access_mode = TPACPI_FAN_WR_ACPI_SFAN;
5737 fan_control_commands |=
5738 TPACPI_FAN_CMD_LEVEL | TPACPI_FAN_CMD_ENABLE;
5739 } else {
5740 if (!gfan_handle) {
5741 /* gfan without sfan means no fan control */
5742 /* all other models implement TP EC 0x2f control */
5743
5744 if (fans_handle) {
5745 /* X31, X40, X41 */
5746 fan_control_access_mode =
5747 TPACPI_FAN_WR_ACPI_FANS;
5748 fan_control_commands |=
5749 TPACPI_FAN_CMD_SPEED |
5750 TPACPI_FAN_CMD_LEVEL |
5751 TPACPI_FAN_CMD_ENABLE;
5752 } else {
5753 fan_control_access_mode = TPACPI_FAN_WR_TPEC;
5754 fan_control_commands |=
5755 TPACPI_FAN_CMD_LEVEL |
5756 TPACPI_FAN_CMD_ENABLE;
5757 }
5758 }
5759 }
5760
5761 vdbg_printk(TPACPI_DBG_INIT, "fan is %s, modes %d, %d\n",
5762 str_supported(fan_status_access_mode != TPACPI_FAN_NONE ||
5763 fan_control_access_mode != TPACPI_FAN_WR_NONE),
5764 fan_status_access_mode, fan_control_access_mode);
5765
5766 /* fan control master switch */
5767 if (!fan_control_allowed) {
5768 fan_control_access_mode = TPACPI_FAN_WR_NONE;
5769 fan_control_commands = 0;
5770 dbg_printk(TPACPI_DBG_INIT,
5771 "fan control features disabled by parameter\n");
5772 }
5773
5774 /* update fan_control_desired_level */
5775 if (fan_status_access_mode != TPACPI_FAN_NONE)
5776 fan_get_status_safe(NULL);
5777
5778 if (fan_status_access_mode != TPACPI_FAN_NONE ||
5779 fan_control_access_mode != TPACPI_FAN_WR_NONE) {
5780 rc = sysfs_create_group(&tpacpi_sensors_pdev->dev.kobj,
5781 &fan_attr_group);
5782 if (rc < 0)
5783 return rc;
5784
5785 rc = driver_create_file(&tpacpi_hwmon_pdriver.driver,
5786 &driver_attr_fan_watchdog);
5787 if (rc < 0) {
5788 sysfs_remove_group(&tpacpi_sensors_pdev->dev.kobj,
5789 &fan_attr_group);
5790 return rc;
5791 }
5792 return 0;
5793 } else
5794 return 1;
5795 }
5796
5797 static void fan_exit(void)
5798 {
5799 vdbg_printk(TPACPI_DBG_EXIT,
5800 "cancelling any pending fan watchdog tasks\n");
5801
5802 /* FIXME: can we really do this unconditionally? */
5803 sysfs_remove_group(&tpacpi_sensors_pdev->dev.kobj, &fan_attr_group);
5804 driver_remove_file(&tpacpi_hwmon_pdriver.driver,
5805 &driver_attr_fan_watchdog);
5806
5807 cancel_delayed_work(&fan_watchdog_task);
5808 flush_workqueue(tpacpi_wq);
5809 }
5810
5811 static int fan_read(char *p)
5812 {
5813 int len = 0;
5814 int rc;
5815 u8 status;
5816 unsigned int speed = 0;
5817
5818 switch (fan_status_access_mode) {
5819 case TPACPI_FAN_RD_ACPI_GFAN:
5820 /* 570, 600e/x, 770e, 770x */
5821 rc = fan_get_status_safe(&status);
5822 if (rc < 0)
5823 return rc;
5824
5825 len += sprintf(p + len, "status:\t\t%s\n"
5826 "level:\t\t%d\n",
5827 (status != 0) ? "enabled" : "disabled", status);
5828 break;
5829
5830 case TPACPI_FAN_RD_TPEC:
5831 /* all except 570, 600e/x, 770e, 770x */
5832 rc = fan_get_status_safe(&status);
5833 if (rc < 0)
5834 return rc;
5835
5836 if (unlikely(tp_features.fan_ctrl_status_undef)) {
5837 if (status != fan_control_initial_status)
5838 tp_features.fan_ctrl_status_undef = 0;
5839 else
5840 /* Return most likely status. In fact, it
5841 * might be the only possible status */
5842 status = TP_EC_FAN_AUTO;
5843 }
5844
5845 len += sprintf(p + len, "status:\t\t%s\n",
5846 (status != 0) ? "enabled" : "disabled");
5847
5848 rc = fan_get_speed(&speed);
5849 if (rc < 0)
5850 return rc;
5851
5852 len += sprintf(p + len, "speed:\t\t%d\n", speed);
5853
5854 if (status & TP_EC_FAN_FULLSPEED)
5855 /* Disengaged mode takes precedence */
5856 len += sprintf(p + len, "level:\t\tdisengaged\n");
5857 else if (status & TP_EC_FAN_AUTO)
5858 len += sprintf(p + len, "level:\t\tauto\n");
5859 else
5860 len += sprintf(p + len, "level:\t\t%d\n", status);
5861 break;
5862
5863 case TPACPI_FAN_NONE:
5864 default:
5865 len += sprintf(p + len, "status:\t\tnot supported\n");
5866 }
5867
5868 if (fan_control_commands & TPACPI_FAN_CMD_LEVEL) {
5869 len += sprintf(p + len, "commands:\tlevel <level>");
5870
5871 switch (fan_control_access_mode) {
5872 case TPACPI_FAN_WR_ACPI_SFAN:
5873 len += sprintf(p + len, " (<level> is 0-7)\n");
5874 break;
5875
5876 default:
5877 len += sprintf(p + len, " (<level> is 0-7, "
5878 "auto, disengaged, full-speed)\n");
5879 break;
5880 }
5881 }
5882
5883 if (fan_control_commands & TPACPI_FAN_CMD_ENABLE)
5884 len += sprintf(p + len, "commands:\tenable, disable\n"
5885 "commands:\twatchdog <timeout> (<timeout> "
5886 "is 0 (off), 1-120 (seconds))\n");
5887
5888 if (fan_control_commands & TPACPI_FAN_CMD_SPEED)
5889 len += sprintf(p + len, "commands:\tspeed <speed>"
5890 " (<speed> is 0-65535)\n");
5891
5892 return len;
5893 }
5894
5895 static int fan_write_cmd_level(const char *cmd, int *rc)
5896 {
5897 int level;
5898
5899 if (strlencmp(cmd, "level auto") == 0)
5900 level = TP_EC_FAN_AUTO;
5901 else if ((strlencmp(cmd, "level disengaged") == 0) |
5902 (strlencmp(cmd, "level full-speed") == 0))
5903 level = TP_EC_FAN_FULLSPEED;
5904 else if (sscanf(cmd, "level %d", &level) != 1)
5905 return 0;
5906
5907 *rc = fan_set_level_safe(level);
5908 if (*rc == -ENXIO)
5909 printk(TPACPI_ERR "level command accepted for unsupported "
5910 "access mode %d", fan_control_access_mode);
5911
5912 return 1;
5913 }
5914
5915 static int fan_write_cmd_enable(const char *cmd, int *rc)
5916 {
5917 if (strlencmp(cmd, "enable") != 0)
5918 return 0;
5919
5920 *rc = fan_set_enable();
5921 if (*rc == -ENXIO)
5922 printk(TPACPI_ERR "enable command accepted for unsupported "
5923 "access mode %d", fan_control_access_mode);
5924
5925 return 1;
5926 }
5927
5928 static int fan_write_cmd_disable(const char *cmd, int *rc)
5929 {
5930 if (strlencmp(cmd, "disable") != 0)
5931 return 0;
5932
5933 *rc = fan_set_disable();
5934 if (*rc == -ENXIO)
5935 printk(TPACPI_ERR "disable command accepted for unsupported "
5936 "access mode %d", fan_control_access_mode);
5937
5938 return 1;
5939 }
5940
5941 static int fan_write_cmd_speed(const char *cmd, int *rc)
5942 {
5943 int speed;
5944
5945 /* TODO:
5946 * Support speed <low> <medium> <high> ? */
5947
5948 if (sscanf(cmd, "speed %d", &speed) != 1)
5949 return 0;
5950
5951 *rc = fan_set_speed(speed);
5952 if (*rc == -ENXIO)
5953 printk(TPACPI_ERR "speed command accepted for unsupported "
5954 "access mode %d", fan_control_access_mode);
5955
5956 return 1;
5957 }
5958
5959 static int fan_write_cmd_watchdog(const char *cmd, int *rc)
5960 {
5961 int interval;
5962
5963 if (sscanf(cmd, "watchdog %d", &interval) != 1)
5964 return 0;
5965
5966 if (interval < 0 || interval > 120)
5967 *rc = -EINVAL;
5968 else
5969 fan_watchdog_maxinterval = interval;
5970
5971 return 1;
5972 }
5973
5974 static int fan_write(char *buf)
5975 {
5976 char *cmd;
5977 int rc = 0;
5978
5979 while (!rc && (cmd = next_cmd(&buf))) {
5980 if (!((fan_control_commands & TPACPI_FAN_CMD_LEVEL) &&
5981 fan_write_cmd_level(cmd, &rc)) &&
5982 !((fan_control_commands & TPACPI_FAN_CMD_ENABLE) &&
5983 (fan_write_cmd_enable(cmd, &rc) ||
5984 fan_write_cmd_disable(cmd, &rc) ||
5985 fan_write_cmd_watchdog(cmd, &rc))) &&
5986 !((fan_control_commands & TPACPI_FAN_CMD_SPEED) &&
5987 fan_write_cmd_speed(cmd, &rc))
5988 )
5989 rc = -EINVAL;
5990 else if (!rc)
5991 fan_watchdog_reset();
5992 }
5993
5994 return rc;
5995 }
5996
5997 static struct ibm_struct fan_driver_data = {
5998 .name = "fan",
5999 .read = fan_read,
6000 .write = fan_write,
6001 .exit = fan_exit,
6002 };
6003
6004 /****************************************************************************
6005 ****************************************************************************
6006 *
6007 * Infrastructure
6008 *
6009 ****************************************************************************
6010 ****************************************************************************/
6011
6012 /* sysfs name ---------------------------------------------------------- */
6013 static ssize_t thinkpad_acpi_pdev_name_show(struct device *dev,
6014 struct device_attribute *attr,
6015 char *buf)
6016 {
6017 return snprintf(buf, PAGE_SIZE, "%s\n", TPACPI_NAME);
6018 }
6019
6020 static struct device_attribute dev_attr_thinkpad_acpi_pdev_name =
6021 __ATTR(name, S_IRUGO, thinkpad_acpi_pdev_name_show, NULL);
6022
6023 /* --------------------------------------------------------------------- */
6024
6025 /* /proc support */
6026 static struct proc_dir_entry *proc_dir;
6027
6028 /*
6029 * Module and infrastructure proble, init and exit handling
6030 */
6031
6032 static int force_load;
6033
6034 #ifdef CONFIG_THINKPAD_ACPI_DEBUG
6035 static const char * __init str_supported(int is_supported)
6036 {
6037 static char text_unsupported[] __initdata = "not supported";
6038
6039 return (is_supported)? &text_unsupported[4] : &text_unsupported[0];
6040 }
6041 #endif /* CONFIG_THINKPAD_ACPI_DEBUG */
6042
6043 static void ibm_exit(struct ibm_struct *ibm)
6044 {
6045 dbg_printk(TPACPI_DBG_EXIT, "removing %s\n", ibm->name);
6046
6047 list_del_init(&ibm->all_drivers);
6048
6049 if (ibm->flags.acpi_notify_installed) {
6050 dbg_printk(TPACPI_DBG_EXIT,
6051 "%s: acpi_remove_notify_handler\n", ibm->name);
6052 BUG_ON(!ibm->acpi);
6053 acpi_remove_notify_handler(*ibm->acpi->handle,
6054 ibm->acpi->type,
6055 dispatch_acpi_notify);
6056 ibm->flags.acpi_notify_installed = 0;
6057 ibm->flags.acpi_notify_installed = 0;
6058 }
6059
6060 if (ibm->flags.proc_created) {
6061 dbg_printk(TPACPI_DBG_EXIT,
6062 "%s: remove_proc_entry\n", ibm->name);
6063 remove_proc_entry(ibm->name, proc_dir);
6064 ibm->flags.proc_created = 0;
6065 }
6066
6067 if (ibm->flags.acpi_driver_registered) {
6068 dbg_printk(TPACPI_DBG_EXIT,
6069 "%s: acpi_bus_unregister_driver\n", ibm->name);
6070 BUG_ON(!ibm->acpi);
6071 acpi_bus_unregister_driver(ibm->acpi->driver);
6072 kfree(ibm->acpi->driver);
6073 ibm->acpi->driver = NULL;
6074 ibm->flags.acpi_driver_registered = 0;
6075 }
6076
6077 if (ibm->flags.init_called && ibm->exit) {
6078 ibm->exit();
6079 ibm->flags.init_called = 0;
6080 }
6081
6082 dbg_printk(TPACPI_DBG_INIT, "finished removing %s\n", ibm->name);
6083 }
6084
6085 static int __init ibm_init(struct ibm_init_struct *iibm)
6086 {
6087 int ret;
6088 struct ibm_struct *ibm = iibm->data;
6089 struct proc_dir_entry *entry;
6090
6091 BUG_ON(ibm == NULL);
6092
6093 INIT_LIST_HEAD(&ibm->all_drivers);
6094
6095 if (ibm->flags.experimental && !experimental)
6096 return 0;
6097
6098 dbg_printk(TPACPI_DBG_INIT,
6099 "probing for %s\n", ibm->name);
6100
6101 if (iibm->init) {
6102 ret = iibm->init(iibm);
6103 if (ret > 0)
6104 return 0; /* probe failed */
6105 if (ret)
6106 return ret;
6107
6108 ibm->flags.init_called = 1;
6109 }
6110
6111 if (ibm->acpi) {
6112 if (ibm->acpi->hid) {
6113 ret = register_tpacpi_subdriver(ibm);
6114 if (ret)
6115 goto err_out;
6116 }
6117
6118 if (ibm->acpi->notify) {
6119 ret = setup_acpi_notify(ibm);
6120 if (ret == -ENODEV) {
6121 printk(TPACPI_NOTICE "disabling subdriver %s\n",
6122 ibm->name);
6123 ret = 0;
6124 goto err_out;
6125 }
6126 if (ret < 0)
6127 goto err_out;
6128 }
6129 }
6130
6131 dbg_printk(TPACPI_DBG_INIT,
6132 "%s installed\n", ibm->name);
6133
6134 if (ibm->read) {
6135 entry = create_proc_entry(ibm->name,
6136 S_IFREG | S_IRUGO | S_IWUSR,
6137 proc_dir);
6138 if (!entry) {
6139 printk(TPACPI_ERR "unable to create proc entry %s\n",
6140 ibm->name);
6141 ret = -ENODEV;
6142 goto err_out;
6143 }
6144 entry->owner = THIS_MODULE;
6145 entry->data = ibm;
6146 entry->read_proc = &dispatch_procfs_read;
6147 if (ibm->write)
6148 entry->write_proc = &dispatch_procfs_write;
6149 ibm->flags.proc_created = 1;
6150 }
6151
6152 list_add_tail(&ibm->all_drivers, &tpacpi_all_drivers);
6153
6154 return 0;
6155
6156 err_out:
6157 dbg_printk(TPACPI_DBG_INIT,
6158 "%s: at error exit path with result %d\n",
6159 ibm->name, ret);
6160
6161 ibm_exit(ibm);
6162 return (ret < 0)? ret : 0;
6163 }
6164
6165 /* Probing */
6166
6167 static void __init get_thinkpad_model_data(struct thinkpad_id_data *tp)
6168 {
6169 const struct dmi_device *dev = NULL;
6170 char ec_fw_string[18];
6171
6172 if (!tp)
6173 return;
6174
6175 memset(tp, 0, sizeof(*tp));
6176
6177 if (dmi_name_in_vendors("IBM"))
6178 tp->vendor = PCI_VENDOR_ID_IBM;
6179 else if (dmi_name_in_vendors("LENOVO"))
6180 tp->vendor = PCI_VENDOR_ID_LENOVO;
6181 else
6182 return;
6183
6184 tp->bios_version_str = kstrdup(dmi_get_system_info(DMI_BIOS_VERSION),
6185 GFP_KERNEL);
6186 if (!tp->bios_version_str)
6187 return;
6188 tp->bios_model = tp->bios_version_str[0]
6189 | (tp->bios_version_str[1] << 8);
6190
6191 /*
6192 * ThinkPad T23 or newer, A31 or newer, R50e or newer,
6193 * X32 or newer, all Z series; Some models must have an
6194 * up-to-date BIOS or they will not be detected.
6195 *
6196 * See http://thinkwiki.org/wiki/List_of_DMI_IDs
6197 */
6198 while ((dev = dmi_find_device(DMI_DEV_TYPE_OEM_STRING, NULL, dev))) {
6199 if (sscanf(dev->name,
6200 "IBM ThinkPad Embedded Controller -[%17c",
6201 ec_fw_string) == 1) {
6202 ec_fw_string[sizeof(ec_fw_string) - 1] = 0;
6203 ec_fw_string[strcspn(ec_fw_string, " ]")] = 0;
6204
6205 tp->ec_version_str = kstrdup(ec_fw_string, GFP_KERNEL);
6206 tp->ec_model = ec_fw_string[0]
6207 | (ec_fw_string[1] << 8);
6208 break;
6209 }
6210 }
6211
6212 tp->model_str = kstrdup(dmi_get_system_info(DMI_PRODUCT_VERSION),
6213 GFP_KERNEL);
6214 if (tp->model_str && strnicmp(tp->model_str, "ThinkPad", 8) != 0) {
6215 kfree(tp->model_str);
6216 tp->model_str = NULL;
6217 }
6218
6219 tp->nummodel_str = kstrdup(dmi_get_system_info(DMI_PRODUCT_NAME),
6220 GFP_KERNEL);
6221 }
6222
6223 static int __init probe_for_thinkpad(void)
6224 {
6225 int is_thinkpad;
6226
6227 if (acpi_disabled)
6228 return -ENODEV;
6229
6230 /*
6231 * Non-ancient models have better DMI tagging, but very old models
6232 * don't.
6233 */
6234 is_thinkpad = (thinkpad_id.model_str != NULL);
6235
6236 /* ec is required because many other handles are relative to it */
6237 TPACPI_ACPIHANDLE_INIT(ec);
6238 if (!ec_handle) {
6239 if (is_thinkpad)
6240 printk(TPACPI_ERR
6241 "Not yet supported ThinkPad detected!\n");
6242 return -ENODEV;
6243 }
6244
6245 /*
6246 * Risks a regression on very old machines, but reduces potential
6247 * false positives a damn great deal
6248 */
6249 if (!is_thinkpad)
6250 is_thinkpad = (thinkpad_id.vendor == PCI_VENDOR_ID_IBM);
6251
6252 if (!is_thinkpad && !force_load)
6253 return -ENODEV;
6254
6255 return 0;
6256 }
6257
6258
6259 /* Module init, exit, parameters */
6260
6261 static struct ibm_init_struct ibms_init[] __initdata = {
6262 {
6263 .init = thinkpad_acpi_driver_init,
6264 .data = &thinkpad_acpi_driver_data,
6265 },
6266 {
6267 .init = hotkey_init,
6268 .data = &hotkey_driver_data,
6269 },
6270 {
6271 .init = bluetooth_init,
6272 .data = &bluetooth_driver_data,
6273 },
6274 {
6275 .init = wan_init,
6276 .data = &wan_driver_data,
6277 },
6278 #ifdef CONFIG_THINKPAD_ACPI_VIDEO
6279 {
6280 .init = video_init,
6281 .data = &video_driver_data,
6282 },
6283 #endif
6284 {
6285 .init = light_init,
6286 .data = &light_driver_data,
6287 },
6288 #ifdef CONFIG_THINKPAD_ACPI_DOCK
6289 {
6290 .init = dock_init,
6291 .data = &dock_driver_data[0],
6292 },
6293 {
6294 .init = dock_init2,
6295 .data = &dock_driver_data[1],
6296 },
6297 #endif
6298 #ifdef CONFIG_THINKPAD_ACPI_BAY
6299 {
6300 .init = bay_init,
6301 .data = &bay_driver_data,
6302 },
6303 #endif
6304 {
6305 .init = cmos_init,
6306 .data = &cmos_driver_data,
6307 },
6308 {
6309 .init = led_init,
6310 .data = &led_driver_data,
6311 },
6312 {
6313 .init = beep_init,
6314 .data = &beep_driver_data,
6315 },
6316 {
6317 .init = thermal_init,
6318 .data = &thermal_driver_data,
6319 },
6320 {
6321 .data = &ecdump_driver_data,
6322 },
6323 {
6324 .init = brightness_init,
6325 .data = &brightness_driver_data,
6326 },
6327 {
6328 .data = &volume_driver_data,
6329 },
6330 {
6331 .init = fan_init,
6332 .data = &fan_driver_data,
6333 },
6334 };
6335
6336 static int __init set_ibm_param(const char *val, struct kernel_param *kp)
6337 {
6338 unsigned int i;
6339 struct ibm_struct *ibm;
6340
6341 if (!kp || !kp->name || !val)
6342 return -EINVAL;
6343
6344 for (i = 0; i < ARRAY_SIZE(ibms_init); i++) {
6345 ibm = ibms_init[i].data;
6346 WARN_ON(ibm == NULL);
6347
6348 if (!ibm || !ibm->name)
6349 continue;
6350
6351 if (strcmp(ibm->name, kp->name) == 0 && ibm->write) {
6352 if (strlen(val) > sizeof(ibms_init[i].param) - 2)
6353 return -ENOSPC;
6354 strcpy(ibms_init[i].param, val);
6355 strcat(ibms_init[i].param, ",");
6356 return 0;
6357 }
6358 }
6359
6360 return -EINVAL;
6361 }
6362
6363 module_param(experimental, int, 0);
6364 MODULE_PARM_DESC(experimental,
6365 "Enables experimental features when non-zero");
6366
6367 module_param_named(debug, dbg_level, uint, 0);
6368 MODULE_PARM_DESC(debug, "Sets debug level bit-mask");
6369
6370 module_param(force_load, bool, 0);
6371 MODULE_PARM_DESC(force_load,
6372 "Attempts to load the driver even on a "
6373 "mis-identified ThinkPad when true");
6374
6375 module_param_named(fan_control, fan_control_allowed, bool, 0);
6376 MODULE_PARM_DESC(fan_control,
6377 "Enables setting fan parameters features when true");
6378
6379 module_param_named(brightness_mode, brightness_mode, int, 0);
6380 MODULE_PARM_DESC(brightness_mode,
6381 "Selects brightness control strategy: "
6382 "0=auto, 1=EC, 2=CMOS, 3=both");
6383
6384 module_param(brightness_enable, uint, 0);
6385 MODULE_PARM_DESC(brightness_enable,
6386 "Enables backlight control when 1, disables when 0");
6387
6388 module_param(hotkey_report_mode, uint, 0);
6389 MODULE_PARM_DESC(hotkey_report_mode,
6390 "used for backwards compatibility with userspace, "
6391 "see documentation");
6392
6393 #define TPACPI_PARAM(feature) \
6394 module_param_call(feature, set_ibm_param, NULL, NULL, 0); \
6395 MODULE_PARM_DESC(feature, "Simulates thinkpad-acpi procfs command " \
6396 "at module load, see documentation")
6397
6398 TPACPI_PARAM(hotkey);
6399 TPACPI_PARAM(bluetooth);
6400 TPACPI_PARAM(video);
6401 TPACPI_PARAM(light);
6402 #ifdef CONFIG_THINKPAD_ACPI_DOCK
6403 TPACPI_PARAM(dock);
6404 #endif
6405 #ifdef CONFIG_THINKPAD_ACPI_BAY
6406 TPACPI_PARAM(bay);
6407 #endif /* CONFIG_THINKPAD_ACPI_BAY */
6408 TPACPI_PARAM(cmos);
6409 TPACPI_PARAM(led);
6410 TPACPI_PARAM(beep);
6411 TPACPI_PARAM(ecdump);
6412 TPACPI_PARAM(brightness);
6413 TPACPI_PARAM(volume);
6414 TPACPI_PARAM(fan);
6415
6416 static void thinkpad_acpi_module_exit(void)
6417 {
6418 struct ibm_struct *ibm, *itmp;
6419
6420 tpacpi_lifecycle = TPACPI_LIFE_EXITING;
6421
6422 list_for_each_entry_safe_reverse(ibm, itmp,
6423 &tpacpi_all_drivers,
6424 all_drivers) {
6425 ibm_exit(ibm);
6426 }
6427
6428 dbg_printk(TPACPI_DBG_INIT, "finished subdriver exit path...\n");
6429
6430 if (tpacpi_inputdev) {
6431 if (tp_features.input_device_registered)
6432 input_unregister_device(tpacpi_inputdev);
6433 else
6434 input_free_device(tpacpi_inputdev);
6435 }
6436
6437 if (tpacpi_hwmon)
6438 hwmon_device_unregister(tpacpi_hwmon);
6439
6440 if (tp_features.sensors_pdev_attrs_registered)
6441 device_remove_file(&tpacpi_sensors_pdev->dev,
6442 &dev_attr_thinkpad_acpi_pdev_name);
6443 if (tpacpi_sensors_pdev)
6444 platform_device_unregister(tpacpi_sensors_pdev);
6445 if (tpacpi_pdev)
6446 platform_device_unregister(tpacpi_pdev);
6447
6448 if (tp_features.sensors_pdrv_attrs_registered)
6449 tpacpi_remove_driver_attributes(&tpacpi_hwmon_pdriver.driver);
6450 if (tp_features.platform_drv_attrs_registered)
6451 tpacpi_remove_driver_attributes(&tpacpi_pdriver.driver);
6452
6453 if (tp_features.sensors_pdrv_registered)
6454 platform_driver_unregister(&tpacpi_hwmon_pdriver);
6455
6456 if (tp_features.platform_drv_registered)
6457 platform_driver_unregister(&tpacpi_pdriver);
6458
6459 if (proc_dir)
6460 remove_proc_entry(TPACPI_PROC_DIR, acpi_root_dir);
6461
6462 if (tpacpi_wq)
6463 destroy_workqueue(tpacpi_wq);
6464
6465 kfree(thinkpad_id.bios_version_str);
6466 kfree(thinkpad_id.ec_version_str);
6467 kfree(thinkpad_id.model_str);
6468 }
6469
6470
6471 static int __init thinkpad_acpi_module_init(void)
6472 {
6473 int ret, i;
6474
6475 tpacpi_lifecycle = TPACPI_LIFE_INIT;
6476
6477 /* Parameter checking */
6478 if (hotkey_report_mode > 2)
6479 return -EINVAL;
6480
6481 /* Driver-level probe */
6482
6483 get_thinkpad_model_data(&thinkpad_id);
6484 ret = probe_for_thinkpad();
6485 if (ret) {
6486 thinkpad_acpi_module_exit();
6487 return ret;
6488 }
6489
6490 /* Driver initialization */
6491
6492 TPACPI_ACPIHANDLE_INIT(ecrd);
6493 TPACPI_ACPIHANDLE_INIT(ecwr);
6494
6495 tpacpi_wq = create_singlethread_workqueue(TPACPI_WORKQUEUE_NAME);
6496 if (!tpacpi_wq) {
6497 thinkpad_acpi_module_exit();
6498 return -ENOMEM;
6499 }
6500
6501 proc_dir = proc_mkdir(TPACPI_PROC_DIR, acpi_root_dir);
6502 if (!proc_dir) {
6503 printk(TPACPI_ERR
6504 "unable to create proc dir " TPACPI_PROC_DIR);
6505 thinkpad_acpi_module_exit();
6506 return -ENODEV;
6507 }
6508 proc_dir->owner = THIS_MODULE;
6509
6510 ret = platform_driver_register(&tpacpi_pdriver);
6511 if (ret) {
6512 printk(TPACPI_ERR
6513 "unable to register main platform driver\n");
6514 thinkpad_acpi_module_exit();
6515 return ret;
6516 }
6517 tp_features.platform_drv_registered = 1;
6518
6519 ret = platform_driver_register(&tpacpi_hwmon_pdriver);
6520 if (ret) {
6521 printk(TPACPI_ERR
6522 "unable to register hwmon platform driver\n");
6523 thinkpad_acpi_module_exit();
6524 return ret;
6525 }
6526 tp_features.sensors_pdrv_registered = 1;
6527
6528 ret = tpacpi_create_driver_attributes(&tpacpi_pdriver.driver);
6529 if (!ret) {
6530 tp_features.platform_drv_attrs_registered = 1;
6531 ret = tpacpi_create_driver_attributes(
6532 &tpacpi_hwmon_pdriver.driver);
6533 }
6534 if (ret) {
6535 printk(TPACPI_ERR
6536 "unable to create sysfs driver attributes\n");
6537 thinkpad_acpi_module_exit();
6538 return ret;
6539 }
6540 tp_features.sensors_pdrv_attrs_registered = 1;
6541
6542
6543 /* Device initialization */
6544 tpacpi_pdev = platform_device_register_simple(TPACPI_DRVR_NAME, -1,
6545 NULL, 0);
6546 if (IS_ERR(tpacpi_pdev)) {
6547 ret = PTR_ERR(tpacpi_pdev);
6548 tpacpi_pdev = NULL;
6549 printk(TPACPI_ERR "unable to register platform device\n");
6550 thinkpad_acpi_module_exit();
6551 return ret;
6552 }
6553 tpacpi_sensors_pdev = platform_device_register_simple(
6554 TPACPI_HWMON_DRVR_NAME,
6555 -1, NULL, 0);
6556 if (IS_ERR(tpacpi_sensors_pdev)) {
6557 ret = PTR_ERR(tpacpi_sensors_pdev);
6558 tpacpi_sensors_pdev = NULL;
6559 printk(TPACPI_ERR
6560 "unable to register hwmon platform device\n");
6561 thinkpad_acpi_module_exit();
6562 return ret;
6563 }
6564 ret = device_create_file(&tpacpi_sensors_pdev->dev,
6565 &dev_attr_thinkpad_acpi_pdev_name);
6566 if (ret) {
6567 printk(TPACPI_ERR
6568 "unable to create sysfs hwmon device attributes\n");
6569 thinkpad_acpi_module_exit();
6570 return ret;
6571 }
6572 tp_features.sensors_pdev_attrs_registered = 1;
6573 tpacpi_hwmon = hwmon_device_register(&tpacpi_sensors_pdev->dev);
6574 if (IS_ERR(tpacpi_hwmon)) {
6575 ret = PTR_ERR(tpacpi_hwmon);
6576 tpacpi_hwmon = NULL;
6577 printk(TPACPI_ERR "unable to register hwmon device\n");
6578 thinkpad_acpi_module_exit();
6579 return ret;
6580 }
6581 mutex_init(&tpacpi_inputdev_send_mutex);
6582 tpacpi_inputdev = input_allocate_device();
6583 if (!tpacpi_inputdev) {
6584 printk(TPACPI_ERR "unable to allocate input device\n");
6585 thinkpad_acpi_module_exit();
6586 return -ENOMEM;
6587 } else {
6588 /* Prepare input device, but don't register */
6589 tpacpi_inputdev->name = "ThinkPad Extra Buttons";
6590 tpacpi_inputdev->phys = TPACPI_DRVR_NAME "/input0";
6591 tpacpi_inputdev->id.bustype = BUS_HOST;
6592 tpacpi_inputdev->id.vendor = (thinkpad_id.vendor) ?
6593 thinkpad_id.vendor :
6594 PCI_VENDOR_ID_IBM;
6595 tpacpi_inputdev->id.product = TPACPI_HKEY_INPUT_PRODUCT;
6596 tpacpi_inputdev->id.version = TPACPI_HKEY_INPUT_VERSION;
6597 }
6598 for (i = 0; i < ARRAY_SIZE(ibms_init); i++) {
6599 ret = ibm_init(&ibms_init[i]);
6600 if (ret >= 0 && *ibms_init[i].param)
6601 ret = ibms_init[i].data->write(ibms_init[i].param);
6602 if (ret < 0) {
6603 thinkpad_acpi_module_exit();
6604 return ret;
6605 }
6606 }
6607 ret = input_register_device(tpacpi_inputdev);
6608 if (ret < 0) {
6609 printk(TPACPI_ERR "unable to register input device\n");
6610 thinkpad_acpi_module_exit();
6611 return ret;
6612 } else {
6613 tp_features.input_device_registered = 1;
6614 }
6615
6616 tpacpi_lifecycle = TPACPI_LIFE_RUNNING;
6617 return 0;
6618 }
6619
6620 /* Please remove this in year 2009 */
6621 MODULE_ALIAS("ibm_acpi");
6622
6623 MODULE_ALIAS(TPACPI_DRVR_SHORTNAME);
6624
6625 /*
6626 * DMI matching for module autoloading
6627 *
6628 * See http://thinkwiki.org/wiki/List_of_DMI_IDs
6629 * See http://thinkwiki.org/wiki/BIOS_Upgrade_Downloads
6630 *
6631 * Only models listed in thinkwiki will be supported, so add yours
6632 * if it is not there yet.
6633 */
6634 #define IBM_BIOS_MODULE_ALIAS(__type) \
6635 MODULE_ALIAS("dmi:bvnIBM:bvr" __type "ET??WW")
6636
6637 /* Non-ancient thinkpads */
6638 MODULE_ALIAS("dmi:bvnIBM:*:svnIBM:*:pvrThinkPad*:rvnIBM:*");
6639 MODULE_ALIAS("dmi:bvnLENOVO:*:svnLENOVO:*:pvrThinkPad*:rvnLENOVO:*");
6640
6641 /* Ancient thinkpad BIOSes have to be identified by
6642 * BIOS type or model number, and there are far less
6643 * BIOS types than model numbers... */
6644 IBM_BIOS_MODULE_ALIAS("I[B,D,H,I,M,N,O,T,W,V,Y,Z]");
6645 IBM_BIOS_MODULE_ALIAS("1[0,3,6,8,A-G,I,K,M-P,S,T]");
6646 IBM_BIOS_MODULE_ALIAS("K[U,X-Z]");
6647
6648 MODULE_AUTHOR("Borislav Deianov, Henrique de Moraes Holschuh");
6649 MODULE_DESCRIPTION(TPACPI_DESC);
6650 MODULE_VERSION(TPACPI_VERSION);
6651 MODULE_LICENSE("GPL");
6652
6653 module_init(thinkpad_acpi_module_init);
6654 module_exit(thinkpad_acpi_module_exit);
Linux 2.6 ibm-acpi/thinkpad-acpi driver git tree