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ACPI: thinkpad-acpi: add development version tag
[linux-2.6/linux-acpi-2.6/ibm-acpi-2.6.git] / drivers / misc / thinkpad_acpi.c
blob911137e9eb3f204c176d22792d9cb1771c9f4986
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 "0.21-20080629"
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 <linux/rfkill.h>
72 #include <asm/uaccess.h>
73
74 #include <linux/dmi.h>
75 #include <linux/jiffies.h>
76 #include <linux/workqueue.h>
77
78 #include <acpi/acpi_drivers.h>
79 #include <acpi/acnamesp.h>
80
81 #include <linux/pci_ids.h>
82
83
84 /* ThinkPad CMOS commands */
85 #define TP_CMOS_VOLUME_DOWN 0
86 #define TP_CMOS_VOLUME_UP 1
87 #define TP_CMOS_VOLUME_MUTE 2
88 #define TP_CMOS_BRIGHTNESS_UP 4
89 #define TP_CMOS_BRIGHTNESS_DOWN 5
90 #define TP_CMOS_THINKLIGHT_ON 12
91 #define TP_CMOS_THINKLIGHT_OFF 13
92
93 /* NVRAM Addresses */
94 enum tp_nvram_addr {
95 TP_NVRAM_ADDR_HK2 = 0x57,
96 TP_NVRAM_ADDR_THINKLIGHT = 0x58,
97 TP_NVRAM_ADDR_VIDEO = 0x59,
98 TP_NVRAM_ADDR_BRIGHTNESS = 0x5e,
99 TP_NVRAM_ADDR_MIXER = 0x60,
100 };
101
102 /* NVRAM bit masks */
103 enum {
104 TP_NVRAM_MASK_HKT_THINKPAD = 0x08,
105 TP_NVRAM_MASK_HKT_ZOOM = 0x20,
106 TP_NVRAM_MASK_HKT_DISPLAY = 0x40,
107 TP_NVRAM_MASK_HKT_HIBERNATE = 0x80,
108 TP_NVRAM_MASK_THINKLIGHT = 0x10,
109 TP_NVRAM_MASK_HKT_DISPEXPND = 0x30,
110 TP_NVRAM_MASK_HKT_BRIGHTNESS = 0x20,
111 TP_NVRAM_MASK_LEVEL_BRIGHTNESS = 0x0f,
112 TP_NVRAM_POS_LEVEL_BRIGHTNESS = 0,
113 TP_NVRAM_MASK_MUTE = 0x40,
114 TP_NVRAM_MASK_HKT_VOLUME = 0x80,
115 TP_NVRAM_MASK_LEVEL_VOLUME = 0x0f,
116 TP_NVRAM_POS_LEVEL_VOLUME = 0,
117 };
118
119 /* ACPI HIDs */
120 #define TPACPI_ACPI_HKEY_HID "IBM0068"
121
122 /* Input IDs */
123 #define TPACPI_HKEY_INPUT_PRODUCT 0x5054 /* "TP" */
124 #define TPACPI_HKEY_INPUT_VERSION 0x4101
125
126
127 /****************************************************************************
128 * Main driver
129 */
130
131 #define TPACPI_NAME "thinkpad"
132 #define TPACPI_DESC "ThinkPad ACPI Extras"
133 #define TPACPI_FILE TPACPI_NAME "_acpi"
134 #define TPACPI_URL "http://ibm-acpi.sf.net/"
135 #define TPACPI_MAIL "ibm-acpi-devel@lists.sourceforge.net"
136
137 #define TPACPI_PROC_DIR "ibm"
138 #define TPACPI_ACPI_EVENT_PREFIX "ibm"
139 #define TPACPI_DRVR_NAME TPACPI_FILE
140 #define TPACPI_DRVR_SHORTNAME "tpacpi"
141 #define TPACPI_HWMON_DRVR_NAME TPACPI_NAME "_hwmon"
142
143 #define TPACPI_NVRAM_KTHREAD_NAME "ktpacpi_nvramd"
144 #define TPACPI_WORKQUEUE_NAME "ktpacpid"
145
146 #define TPACPI_MAX_ACPI_ARGS 3
147
148 /* rfkill switches */
149 enum {
150 TPACPI_RFK_BLUETOOTH_SW_ID = 0,
151 TPACPI_RFK_WWAN_SW_ID,
152 };
153
154 /* Debugging */
155 #define TPACPI_LOG TPACPI_FILE ": "
156 #define TPACPI_ERR KERN_ERR TPACPI_LOG
157 #define TPACPI_NOTICE KERN_NOTICE TPACPI_LOG
158 #define TPACPI_INFO KERN_INFO TPACPI_LOG
159 #define TPACPI_DEBUG KERN_DEBUG TPACPI_LOG
160
161 #define TPACPI_DBG_ALL 0xffff
162 #define TPACPI_DBG_ALL 0xffff
163 #define TPACPI_DBG_INIT 0x0001
164 #define TPACPI_DBG_EXIT 0x0002
165 #define dbg_printk(a_dbg_level, format, arg...) \
166 do { if (dbg_level & a_dbg_level) \
167 printk(TPACPI_DEBUG "%s: " format, __func__ , ## arg); \
168 } while (0)
169 #ifdef CONFIG_THINKPAD_ACPI_DEBUG
170 #define vdbg_printk(a_dbg_level, format, arg...) \
171 dbg_printk(a_dbg_level, format, ## arg)
172 static const char *str_supported(int is_supported);
173 #else
174 #define vdbg_printk(a_dbg_level, format, arg...)
175 #endif
176
177 #define onoff(status, bit) ((status) & (1 << (bit)) ? "on" : "off")
178 #define enabled(status, bit) ((status) & (1 << (bit)) ? "enabled" : "disabled")
179 #define strlencmp(a, b) (strncmp((a), (b), strlen(b)))
180
181
182 /****************************************************************************
183 * Driver-wide structs and misc. variables
184 */
185
186 struct ibm_struct;
187
188 struct tp_acpi_drv_struct {
189 const struct acpi_device_id *hid;
190 struct acpi_driver *driver;
191
192 void (*notify) (struct ibm_struct *, u32);
193 acpi_handle *handle;
194 u32 type;
195 struct acpi_device *device;
196 };
197
198 struct ibm_struct {
199 char *name;
200
201 int (*read) (char *);
202 int (*write) (char *);
203 void (*exit) (void);
204 void (*resume) (void);
205 void (*suspend) (pm_message_t state);
206
207 struct list_head all_drivers;
208
209 struct tp_acpi_drv_struct *acpi;
210
211 struct {
212 u8 acpi_driver_registered:1;
213 u8 acpi_notify_installed:1;
214 u8 proc_created:1;
215 u8 init_called:1;
216 u8 experimental:1;
217 } flags;
218 };
219
220 struct ibm_init_struct {
221 char param[32];
222
223 int (*init) (struct ibm_init_struct *);
224 struct ibm_struct *data;
225 };
226
227 static struct {
228 #ifdef CONFIG_THINKPAD_ACPI_BAY
229 u32 bay_status:1;
230 u32 bay_eject:1;
231 u32 bay_status2:1;
232 u32 bay_eject2:1;
233 #endif
234 u32 bluetooth:1;
235 u32 hotkey:1;
236 u32 hotkey_mask:1;
237 u32 hotkey_wlsw:1;
238 u32 hotkey_tablet:1;
239 u32 light:1;
240 u32 light_status:1;
241 u32 bright_16levels:1;
242 u32 bright_acpimode:1;
243 u32 wan:1;
244 u32 fan_ctrl_status_undef:1;
245 u32 input_device_registered:1;
246 u32 platform_drv_registered:1;
247 u32 platform_drv_attrs_registered:1;
248 u32 sensors_pdrv_registered:1;
249 u32 sensors_pdrv_attrs_registered:1;
250 u32 sensors_pdev_attrs_registered:1;
251 u32 hotkey_poll_active:1;
252 } tp_features;
253
254 static struct {
255 u16 hotkey_mask_ff:1;
256 u16 bright_cmos_ec_unsync:1;
257 } tp_warned;
258
259 struct thinkpad_id_data {
260 unsigned int vendor; /* ThinkPad vendor:
261 * PCI_VENDOR_ID_IBM/PCI_VENDOR_ID_LENOVO */
262
263 char *bios_version_str; /* Something like 1ZET51WW (1.03z) */
264 char *ec_version_str; /* Something like 1ZHT51WW-1.04a */
265
266 u16 bios_model; /* Big Endian, TP-1Y = 0x5931, 0 = unknown */
267 u16 ec_model;
268
269 char *model_str; /* ThinkPad T43 */
270 char *nummodel_str; /* 9384A9C for a 9384-A9C model */
271 };
272 static struct thinkpad_id_data thinkpad_id;
273
274 static enum {
275 TPACPI_LIFE_INIT = 0,
276 TPACPI_LIFE_RUNNING,
277 TPACPI_LIFE_EXITING,
278 } tpacpi_lifecycle;
279
280 static int experimental;
281 static u32 dbg_level;
282
283 static struct workqueue_struct *tpacpi_wq;
284
285 /* Special LED class that can defer work */
286 struct tpacpi_led_classdev {
287 struct led_classdev led_classdev;
288 struct work_struct work;
289 enum led_brightness new_brightness;
290 unsigned int led;
291 };
292
293 /****************************************************************************
294 ****************************************************************************
295 *
296 * ACPI Helpers and device model
297 *
298 ****************************************************************************
299 ****************************************************************************/
300
301 /*************************************************************************
302 * ACPI basic handles
303 */
304
305 static acpi_handle root_handle;
306
307 #define TPACPI_HANDLE(object, parent, paths...) \
308 static acpi_handle object##_handle; \
309 static acpi_handle *object##_parent = &parent##_handle; \
310 static char *object##_path; \
311 static char *object##_paths[] = { paths }
312
313 TPACPI_HANDLE(ec, root, "\\_SB.PCI0.ISA.EC0", /* 240, 240x */
314 "\\_SB.PCI.ISA.EC", /* 570 */
315 "\\_SB.PCI0.ISA0.EC0", /* 600e/x, 770e, 770x */
316 "\\_SB.PCI0.ISA.EC", /* A21e, A2xm/p, T20-22, X20-21 */
317 "\\_SB.PCI0.AD4S.EC0", /* i1400, R30 */
318 "\\_SB.PCI0.ICH3.EC0", /* R31 */
319 "\\_SB.PCI0.LPC.EC", /* all others */
320 );
321
322 TPACPI_HANDLE(ecrd, ec, "ECRD"); /* 570 */
323 TPACPI_HANDLE(ecwr, ec, "ECWR"); /* 570 */
324
325 TPACPI_HANDLE(cmos, root, "\\UCMS", /* R50, R50e, R50p, R51, */
326 /* T4x, X31, X40 */
327 "\\CMOS", /* A3x, G4x, R32, T23, T30, X22-24, X30 */
328 "\\CMS", /* R40, R40e */
329 ); /* all others */
330
331 TPACPI_HANDLE(hkey, ec, "\\_SB.HKEY", /* 600e/x, 770e, 770x */
332 "^HKEY", /* R30, R31 */
333 "HKEY", /* all others */
334 ); /* 570 */
335
336 TPACPI_HANDLE(vid, root, "\\_SB.PCI.AGP.VGA", /* 570 */
337 "\\_SB.PCI0.AGP0.VID0", /* 600e/x, 770x */
338 "\\_SB.PCI0.VID0", /* 770e */
339 "\\_SB.PCI0.VID", /* A21e, G4x, R50e, X30, X40 */
340 "\\_SB.PCI0.AGP.VID", /* all others */
341 ); /* R30, R31 */
342
343
344 /*************************************************************************
345 * ACPI helpers
346 */
347
348 static int acpi_evalf(acpi_handle handle,
349 void *res, char *method, char *fmt, ...)
350 {
351 char *fmt0 = fmt;
352 struct acpi_object_list params;
353 union acpi_object in_objs[TPACPI_MAX_ACPI_ARGS];
354 struct acpi_buffer result, *resultp;
355 union acpi_object out_obj;
356 acpi_status status;
357 va_list ap;
358 char res_type;
359 int success;
360 int quiet;
361
362 if (!*fmt) {
363 printk(TPACPI_ERR "acpi_evalf() called with empty format\n");
364 return 0;
365 }
366
367 if (*fmt == 'q') {
368 quiet = 1;
369 fmt++;
370 } else
371 quiet = 0;
372
373 res_type = *(fmt++);
374
375 params.count = 0;
376 params.pointer = &in_objs[0];
377
378 va_start(ap, fmt);
379 while (*fmt) {
380 char c = *(fmt++);
381 switch (c) {
382 case 'd': /* int */
383 in_objs[params.count].integer.value = va_arg(ap, int);
384 in_objs[params.count++].type = ACPI_TYPE_INTEGER;
385 break;
386 /* add more types as needed */
387 default:
388 printk(TPACPI_ERR "acpi_evalf() called "
389 "with invalid format character '%c'\n", c);
390 return 0;
391 }
392 }
393 va_end(ap);
394
395 if (res_type != 'v') {
396 result.length = sizeof(out_obj);
397 result.pointer = &out_obj;
398 resultp = &result;
399 } else
400 resultp = NULL;
401
402 status = acpi_evaluate_object(handle, method, &params, resultp);
403
404 switch (res_type) {
405 case 'd': /* int */
406 if (res)
407 *(int *)res = out_obj.integer.value;
408 success = status == AE_OK && out_obj.type == ACPI_TYPE_INTEGER;
409 break;
410 case 'v': /* void */
411 success = status == AE_OK;
412 break;
413 /* add more types as needed */
414 default:
415 printk(TPACPI_ERR "acpi_evalf() called "
416 "with invalid format character '%c'\n", res_type);
417 return 0;
418 }
419
420 if (!success && !quiet)
421 printk(TPACPI_ERR "acpi_evalf(%s, %s, ...) failed: %d\n",
422 method, fmt0, status);
423
424 return success;
425 }
426
427 static int acpi_ec_read(int i, u8 *p)
428 {
429 int v;
430
431 if (ecrd_handle) {
432 if (!acpi_evalf(ecrd_handle, &v, NULL, "dd", i))
433 return 0;
434 *p = v;
435 } else {
436 if (ec_read(i, p) < 0)
437 return 0;
438 }
439
440 return 1;
441 }
442
443 static int acpi_ec_write(int i, u8 v)
444 {
445 if (ecwr_handle) {
446 if (!acpi_evalf(ecwr_handle, NULL, NULL, "vdd", i, v))
447 return 0;
448 } else {
449 if (ec_write(i, v) < 0)
450 return 0;
451 }
452
453 return 1;
454 }
455
456 #if defined(CONFIG_THINKPAD_ACPI_DOCK) || defined(CONFIG_THINKPAD_ACPI_BAY)
457 static int _sta(acpi_handle handle)
458 {
459 int status;
460
461 if (!handle || !acpi_evalf(handle, &status, "_STA", "d"))
462 status = 0;
463
464 return status;
465 }
466 #endif
467
468 static int issue_thinkpad_cmos_command(int cmos_cmd)
469 {
470 if (!cmos_handle)
471 return -ENXIO;
472
473 if (!acpi_evalf(cmos_handle, NULL, NULL, "vd", cmos_cmd))
474 return -EIO;
475
476 return 0;
477 }
478
479 /*************************************************************************
480 * ACPI device model
481 */
482
483 #define TPACPI_ACPIHANDLE_INIT(object) \
484 drv_acpi_handle_init(#object, &object##_handle, *object##_parent, \
485 object##_paths, ARRAY_SIZE(object##_paths), &object##_path)
486
487 static void drv_acpi_handle_init(char *name,
488 acpi_handle *handle, acpi_handle parent,
489 char **paths, int num_paths, char **path)
490 {
491 int i;
492 acpi_status status;
493
494 vdbg_printk(TPACPI_DBG_INIT, "trying to locate ACPI handle for %s\n",
495 name);
496
497 for (i = 0; i < num_paths; i++) {
498 status = acpi_get_handle(parent, paths[i], handle);
499 if (ACPI_SUCCESS(status)) {
500 *path = paths[i];
501 dbg_printk(TPACPI_DBG_INIT,
502 "Found ACPI handle %s for %s\n",
503 *path, name);
504 return;
505 }
506 }
507
508 vdbg_printk(TPACPI_DBG_INIT, "ACPI handle for %s not found\n",
509 name);
510 *handle = NULL;
511 }
512
513 static void dispatch_acpi_notify(acpi_handle handle, u32 event, void *data)
514 {
515 struct ibm_struct *ibm = data;
516
517 if (tpacpi_lifecycle != TPACPI_LIFE_RUNNING)
518 return;
519
520 if (!ibm || !ibm->acpi || !ibm->acpi->notify)
521 return;
522
523 ibm->acpi->notify(ibm, event);
524 }
525
526 static int __init setup_acpi_notify(struct ibm_struct *ibm)
527 {
528 acpi_status status;
529 int rc;
530
531 BUG_ON(!ibm->acpi);
532
533 if (!*ibm->acpi->handle)
534 return 0;
535
536 vdbg_printk(TPACPI_DBG_INIT,
537 "setting up ACPI notify for %s\n", ibm->name);
538
539 rc = acpi_bus_get_device(*ibm->acpi->handle, &ibm->acpi->device);
540 if (rc < 0) {
541 printk(TPACPI_ERR "acpi_bus_get_device(%s) failed: %d\n",
542 ibm->name, rc);
543 return -ENODEV;
544 }
545
546 acpi_driver_data(ibm->acpi->device) = ibm;
547 sprintf(acpi_device_class(ibm->acpi->device), "%s/%s",
548 TPACPI_ACPI_EVENT_PREFIX,
549 ibm->name);
550
551 status = acpi_install_notify_handler(*ibm->acpi->handle,
552 ibm->acpi->type, dispatch_acpi_notify, ibm);
553 if (ACPI_FAILURE(status)) {
554 if (status == AE_ALREADY_EXISTS) {
555 printk(TPACPI_NOTICE
556 "another device driver is already "
557 "handling %s events\n", ibm->name);
558 } else {
559 printk(TPACPI_ERR
560 "acpi_install_notify_handler(%s) failed: %d\n",
561 ibm->name, status);
562 }
563 return -ENODEV;
564 }
565 ibm->flags.acpi_notify_installed = 1;
566 return 0;
567 }
568
569 static int __init tpacpi_device_add(struct acpi_device *device)
570 {
571 return 0;
572 }
573
574 static int __init register_tpacpi_subdriver(struct ibm_struct *ibm)
575 {
576 int rc;
577
578 dbg_printk(TPACPI_DBG_INIT,
579 "registering %s as an ACPI driver\n", ibm->name);
580
581 BUG_ON(!ibm->acpi);
582
583 ibm->acpi->driver = kzalloc(sizeof(struct acpi_driver), GFP_KERNEL);
584 if (!ibm->acpi->driver) {
585 printk(TPACPI_ERR "kzalloc(ibm->driver) failed\n");
586 return -ENOMEM;
587 }
588
589 sprintf(ibm->acpi->driver->name, "%s_%s", TPACPI_NAME, ibm->name);
590 ibm->acpi->driver->ids = ibm->acpi->hid;
591
592 ibm->acpi->driver->ops.add = &tpacpi_device_add;
593
594 rc = acpi_bus_register_driver(ibm->acpi->driver);
595 if (rc < 0) {
596 printk(TPACPI_ERR "acpi_bus_register_driver(%s) failed: %d\n",
597 ibm->name, rc);
598 kfree(ibm->acpi->driver);
599 ibm->acpi->driver = NULL;
600 } else if (!rc)
601 ibm->flags.acpi_driver_registered = 1;
602
603 return rc;
604 }
605
606
607 /****************************************************************************
608 ****************************************************************************
609 *
610 * Procfs Helpers
611 *
612 ****************************************************************************
613 ****************************************************************************/
614
615 static int dispatch_procfs_read(char *page, char **start, off_t off,
616 int count, int *eof, void *data)
617 {
618 struct ibm_struct *ibm = data;
619 int len;
620
621 if (!ibm || !ibm->read)
622 return -EINVAL;
623
624 len = ibm->read(page);
625 if (len < 0)
626 return len;
627
628 if (len <= off + count)
629 *eof = 1;
630 *start = page + off;
631 len -= off;
632 if (len > count)
633 len = count;
634 if (len < 0)
635 len = 0;
636
637 return len;
638 }
639
640 static int dispatch_procfs_write(struct file *file,
641 const char __user *userbuf,
642 unsigned long count, void *data)
643 {
644 struct ibm_struct *ibm = data;
645 char *kernbuf;
646 int ret;
647
648 if (!ibm || !ibm->write)
649 return -EINVAL;
650
651 kernbuf = kmalloc(count + 2, GFP_KERNEL);
652 if (!kernbuf)
653 return -ENOMEM;
654
655 if (copy_from_user(kernbuf, userbuf, count)) {
656 kfree(kernbuf);
657 return -EFAULT;
658 }
659
660 kernbuf[count] = 0;
661 strcat(kernbuf, ",");
662 ret = ibm->write(kernbuf);
663 if (ret == 0)
664 ret = count;
665
666 kfree(kernbuf);
667
668 return ret;
669 }
670
671 static char *next_cmd(char **cmds)
672 {
673 char *start = *cmds;
674 char *end;
675
676 while ((end = strchr(start, ',')) && end == start)
677 start = end + 1;
678
679 if (!end)
680 return NULL;
681
682 *end = 0;
683 *cmds = end + 1;
684 return start;
685 }
686
687
688 /****************************************************************************
689 ****************************************************************************
690 *
691 * Device model: input, hwmon and platform
692 *
693 ****************************************************************************
694 ****************************************************************************/
695
696 static struct platform_device *tpacpi_pdev;
697 static struct platform_device *tpacpi_sensors_pdev;
698 static struct device *tpacpi_hwmon;
699 static struct input_dev *tpacpi_inputdev;
700 static struct mutex tpacpi_inputdev_send_mutex;
701 static LIST_HEAD(tpacpi_all_drivers);
702
703 static int tpacpi_suspend_handler(struct platform_device *pdev,
704 pm_message_t state)
705 {
706 struct ibm_struct *ibm, *itmp;
707
708 list_for_each_entry_safe(ibm, itmp,
709 &tpacpi_all_drivers,
710 all_drivers) {
711 if (ibm->suspend)
712 (ibm->suspend)(state);
713 }
714
715 return 0;
716 }
717
718 static int tpacpi_resume_handler(struct platform_device *pdev)
719 {
720 struct ibm_struct *ibm, *itmp;
721
722 list_for_each_entry_safe(ibm, itmp,
723 &tpacpi_all_drivers,
724 all_drivers) {
725 if (ibm->resume)
726 (ibm->resume)();
727 }
728
729 return 0;
730 }
731
732 static struct platform_driver tpacpi_pdriver = {
733 .driver = {
734 .name = TPACPI_DRVR_NAME,
735 .owner = THIS_MODULE,
736 },
737 .suspend = tpacpi_suspend_handler,
738 .resume = tpacpi_resume_handler,
739 };
740
741 static struct platform_driver tpacpi_hwmon_pdriver = {
742 .driver = {
743 .name = TPACPI_HWMON_DRVR_NAME,
744 .owner = THIS_MODULE,
745 },
746 };
747
748 /*************************************************************************
749 * sysfs support helpers
750 */
751
752 struct attribute_set {
753 unsigned int members, max_members;
754 struct attribute_group group;
755 };
756
757 struct attribute_set_obj {
758 struct attribute_set s;
759 struct attribute *a;
760 } __attribute__((packed));
761
762 static struct attribute_set *create_attr_set(unsigned int max_members,
763 const char *name)
764 {
765 struct attribute_set_obj *sobj;
766
767 if (max_members == 0)
768 return NULL;
769
770 /* Allocates space for implicit NULL at the end too */
771 sobj = kzalloc(sizeof(struct attribute_set_obj) +
772 max_members * sizeof(struct attribute *),
773 GFP_KERNEL);
774 if (!sobj)
775 return NULL;
776 sobj->s.max_members = max_members;
777 sobj->s.group.attrs = &sobj->a;
778 sobj->s.group.name = name;
779
780 return &sobj->s;
781 }
782
783 #define destroy_attr_set(_set) \
784 kfree(_set);
785
786 /* not multi-threaded safe, use it in a single thread per set */
787 static int add_to_attr_set(struct attribute_set *s, struct attribute *attr)
788 {
789 if (!s || !attr)
790 return -EINVAL;
791
792 if (s->members >= s->max_members)
793 return -ENOMEM;
794
795 s->group.attrs[s->members] = attr;
796 s->members++;
797
798 return 0;
799 }
800
801 static int add_many_to_attr_set(struct attribute_set *s,
802 struct attribute **attr,
803 unsigned int count)
804 {
805 int i, res;
806
807 for (i = 0; i < count; i++) {
808 res = add_to_attr_set(s, attr[i]);
809 if (res)
810 return res;
811 }
812
813 return 0;
814 }
815
816 static void delete_attr_set(struct attribute_set *s, struct kobject *kobj)
817 {
818 sysfs_remove_group(kobj, &s->group);
819 destroy_attr_set(s);
820 }
821
822 #define register_attr_set_with_sysfs(_attr_set, _kobj) \
823 sysfs_create_group(_kobj, &_attr_set->group)
824
825 static int parse_strtoul(const char *buf,
826 unsigned long max, unsigned long *value)
827 {
828 char *endp;
829
830 while (*buf && isspace(*buf))
831 buf++;
832 *value = simple_strtoul(buf, &endp, 0);
833 while (*endp && isspace(*endp))
834 endp++;
835 if (*endp || *value > max)
836 return -EINVAL;
837
838 return 0;
839 }
840
841 static int __init tpacpi_query_bcl_levels(acpi_handle handle)
842 {
843 struct acpi_buffer buffer = { ACPI_ALLOCATE_BUFFER, NULL };
844 union acpi_object *obj;
845 int rc;
846
847 if (ACPI_SUCCESS(acpi_evaluate_object(handle, NULL, NULL, &buffer))) {
848 obj = (union acpi_object *)buffer.pointer;
849 if (!obj || (obj->type != ACPI_TYPE_PACKAGE)) {
850 printk(TPACPI_ERR "Unknown _BCL data, "
851 "please report this to %s\n", TPACPI_MAIL);
852 rc = 0;
853 } else {
854 rc = obj->package.count;
855 }
856 } else {
857 return 0;
858 }
859
860 kfree(buffer.pointer);
861 return rc;
862 }
863
864 static acpi_status __init tpacpi_acpi_walk_find_bcl(acpi_handle handle,
865 u32 lvl, void *context, void **rv)
866 {
867 char name[ACPI_PATH_SEGMENT_LENGTH];
868 struct acpi_buffer buffer = { sizeof(name), &name };
869
870 if (ACPI_SUCCESS(acpi_get_name(handle, ACPI_SINGLE_NAME, &buffer)) &&
871 !strncmp("_BCL", name, sizeof(name) - 1)) {
872 BUG_ON(!rv || !*rv);
873 **(int **)rv = tpacpi_query_bcl_levels(handle);
874 return AE_CTRL_TERMINATE;
875 } else {
876 return AE_OK;
877 }
878 }
879
880 /*
881 * Returns 0 (no ACPI _BCL or _BCL invalid), or size of brightness map
882 */
883 static int __init tpacpi_check_std_acpi_brightness_support(void)
884 {
885 int status;
886 int bcl_levels = 0;
887 void *bcl_ptr = &bcl_levels;
888
889 if (!vid_handle) {
890 TPACPI_ACPIHANDLE_INIT(vid);
891 }
892 if (!vid_handle)
893 return 0;
894
895 /*
896 * Search for a _BCL method, and execute it. This is safe on all
897 * ThinkPads, and as a side-effect, _BCL will place a Lenovo Vista
898 * BIOS in ACPI backlight control mode. We do NOT have to care
899 * about calling the _BCL method in an enabled video device, any
900 * will do for our purposes.
901 */
902
903 status = acpi_walk_namespace(ACPI_TYPE_METHOD, vid_handle, 3,
904 tpacpi_acpi_walk_find_bcl, NULL,
905 &bcl_ptr);
906
907 if (ACPI_SUCCESS(status) && bcl_levels > 2) {
908 tp_features.bright_acpimode = 1;
909 return (bcl_levels - 2);
910 }
911
912 return 0;
913 }
914
915 static int __init tpacpi_new_rfkill(const unsigned int id,
916 struct rfkill **rfk,
917 const enum rfkill_type rfktype,
918 const char *name,
919 int (*toggle_radio)(void *, enum rfkill_state),
920 int (*get_state)(void *, enum rfkill_state *))
921 {
922 int res;
923 enum rfkill_state initial_state;
924
925 *rfk = rfkill_allocate(&tpacpi_pdev->dev, rfktype);
926 if (!*rfk) {
927 printk(TPACPI_ERR
928 "failed to allocate memory for rfkill class\n");
929 return -ENOMEM;
930 }
931
932 (*rfk)->name = name;
933 (*rfk)->get_state = get_state;
934 (*rfk)->toggle_radio = toggle_radio;
935
936 if (!get_state(NULL, &initial_state))
937 (*rfk)->state = initial_state;
938
939 res = rfkill_register(*rfk);
940 if (res < 0) {
941 printk(TPACPI_ERR
942 "failed to register %s rfkill switch: %d\n",
943 name, res);
944 rfkill_free(*rfk);
945 *rfk = NULL;
946 return res;
947 }
948
949 return 0;
950 }
951
952 /*************************************************************************
953 * thinkpad-acpi driver attributes
954 */
955
956 /* interface_version --------------------------------------------------- */
957 static ssize_t tpacpi_driver_interface_version_show(
958 struct device_driver *drv,
959 char *buf)
960 {
961 return snprintf(buf, PAGE_SIZE, "0x%08x\n", TPACPI_SYSFS_VERSION);
962 }
963
964 static DRIVER_ATTR(interface_version, S_IRUGO,
965 tpacpi_driver_interface_version_show, NULL);
966
967 /* debug_level --------------------------------------------------------- */
968 static ssize_t tpacpi_driver_debug_show(struct device_driver *drv,
969 char *buf)
970 {
971 return snprintf(buf, PAGE_SIZE, "0x%04x\n", dbg_level);
972 }
973
974 static ssize_t tpacpi_driver_debug_store(struct device_driver *drv,
975 const char *buf, size_t count)
976 {
977 unsigned long t;
978
979 if (parse_strtoul(buf, 0xffff, &t))
980 return -EINVAL;
981
982 dbg_level = t;
983
984 return count;
985 }
986
987 static DRIVER_ATTR(debug_level, S_IWUSR | S_IRUGO,
988 tpacpi_driver_debug_show, tpacpi_driver_debug_store);
989
990 /* version ------------------------------------------------------------- */
991 static ssize_t tpacpi_driver_version_show(struct device_driver *drv,
992 char *buf)
993 {
994 return snprintf(buf, PAGE_SIZE, "%s v%s\n",
995 TPACPI_DESC, TPACPI_VERSION);
996 }
997
998 static DRIVER_ATTR(version, S_IRUGO,
999 tpacpi_driver_version_show, NULL);
1000
1001 /* --------------------------------------------------------------------- */
1002
1003 static struct driver_attribute *tpacpi_driver_attributes[] = {
1004 &driver_attr_debug_level, &driver_attr_version,
1005 &driver_attr_interface_version,
1006 };
1007
1008 static int __init tpacpi_create_driver_attributes(struct device_driver *drv)
1009 {
1010 int i, res;
1011
1012 i = 0;
1013 res = 0;
1014 while (!res && i < ARRAY_SIZE(tpacpi_driver_attributes)) {
1015 res = driver_create_file(drv, tpacpi_driver_attributes[i]);
1016 i++;
1017 }
1018
1019 return res;
1020 }
1021
1022 static void tpacpi_remove_driver_attributes(struct device_driver *drv)
1023 {
1024 int i;
1025
1026 for (i = 0; i < ARRAY_SIZE(tpacpi_driver_attributes); i++)
1027 driver_remove_file(drv, tpacpi_driver_attributes[i]);
1028 }
1029
1030 /****************************************************************************
1031 ****************************************************************************
1032 *
1033 * Subdrivers
1034 *
1035 ****************************************************************************
1036 ****************************************************************************/
1037
1038 /*************************************************************************
1039 * thinkpad-acpi init subdriver
1040 */
1041
1042 static int __init thinkpad_acpi_driver_init(struct ibm_init_struct *iibm)
1043 {
1044 printk(TPACPI_INFO "%s v%s\n", TPACPI_DESC, TPACPI_VERSION);
1045 printk(TPACPI_INFO "%s\n", TPACPI_URL);
1046
1047 printk(TPACPI_INFO "ThinkPad BIOS %s, EC %s\n",
1048 (thinkpad_id.bios_version_str) ?
1049 thinkpad_id.bios_version_str : "unknown",
1050 (thinkpad_id.ec_version_str) ?
1051 thinkpad_id.ec_version_str : "unknown");
1052
1053 if (thinkpad_id.vendor && thinkpad_id.model_str)
1054 printk(TPACPI_INFO "%s %s, model %s\n",
1055 (thinkpad_id.vendor == PCI_VENDOR_ID_IBM) ?
1056 "IBM" : ((thinkpad_id.vendor ==
1057 PCI_VENDOR_ID_LENOVO) ?
1058 "Lenovo" : "Unknown vendor"),
1059 thinkpad_id.model_str,
1060 (thinkpad_id.nummodel_str) ?
1061 thinkpad_id.nummodel_str : "unknown");
1062
1063 return 0;
1064 }
1065
1066 static int thinkpad_acpi_driver_read(char *p)
1067 {
1068 int len = 0;
1069
1070 len += sprintf(p + len, "driver:\t\t%s\n", TPACPI_DESC);
1071 len += sprintf(p + len, "version:\t%s\n", TPACPI_VERSION);
1072
1073 return len;
1074 }
1075
1076 static struct ibm_struct thinkpad_acpi_driver_data = {
1077 .name = "driver",
1078 .read = thinkpad_acpi_driver_read,
1079 };
1080
1081 /*************************************************************************
1082 * Hotkey subdriver
1083 */
1084
1085 enum { /* hot key scan codes (derived from ACPI DSDT) */
1086 TP_ACPI_HOTKEYSCAN_FNF1 = 0,
1087 TP_ACPI_HOTKEYSCAN_FNF2,
1088 TP_ACPI_HOTKEYSCAN_FNF3,
1089 TP_ACPI_HOTKEYSCAN_FNF4,
1090 TP_ACPI_HOTKEYSCAN_FNF5,
1091 TP_ACPI_HOTKEYSCAN_FNF6,
1092 TP_ACPI_HOTKEYSCAN_FNF7,
1093 TP_ACPI_HOTKEYSCAN_FNF8,
1094 TP_ACPI_HOTKEYSCAN_FNF9,
1095 TP_ACPI_HOTKEYSCAN_FNF10,
1096 TP_ACPI_HOTKEYSCAN_FNF11,
1097 TP_ACPI_HOTKEYSCAN_FNF12,
1098 TP_ACPI_HOTKEYSCAN_FNBACKSPACE,
1099 TP_ACPI_HOTKEYSCAN_FNINSERT,
1100 TP_ACPI_HOTKEYSCAN_FNDELETE,
1101 TP_ACPI_HOTKEYSCAN_FNHOME,
1102 TP_ACPI_HOTKEYSCAN_FNEND,
1103 TP_ACPI_HOTKEYSCAN_FNPAGEUP,
1104 TP_ACPI_HOTKEYSCAN_FNPAGEDOWN,
1105 TP_ACPI_HOTKEYSCAN_FNSPACE,
1106 TP_ACPI_HOTKEYSCAN_VOLUMEUP,
1107 TP_ACPI_HOTKEYSCAN_VOLUMEDOWN,
1108 TP_ACPI_HOTKEYSCAN_MUTE,
1109 TP_ACPI_HOTKEYSCAN_THINKPAD,
1110 };
1111
1112 enum { /* Keys available through NVRAM polling */
1113 TPACPI_HKEY_NVRAM_KNOWN_MASK = 0x00fb88c0U,
1114 TPACPI_HKEY_NVRAM_GOOD_MASK = 0x00fb8000U,
1115 };
1116
1117 enum { /* Positions of some of the keys in hotkey masks */
1118 TP_ACPI_HKEY_DISPSWTCH_MASK = 1 << TP_ACPI_HOTKEYSCAN_FNF7,
1119 TP_ACPI_HKEY_DISPXPAND_MASK = 1 << TP_ACPI_HOTKEYSCAN_FNF8,
1120 TP_ACPI_HKEY_HIBERNATE_MASK = 1 << TP_ACPI_HOTKEYSCAN_FNF12,
1121 TP_ACPI_HKEY_BRGHTUP_MASK = 1 << TP_ACPI_HOTKEYSCAN_FNHOME,
1122 TP_ACPI_HKEY_BRGHTDWN_MASK = 1 << TP_ACPI_HOTKEYSCAN_FNEND,
1123 TP_ACPI_HKEY_THNKLGHT_MASK = 1 << TP_ACPI_HOTKEYSCAN_FNPAGEUP,
1124 TP_ACPI_HKEY_ZOOM_MASK = 1 << TP_ACPI_HOTKEYSCAN_FNSPACE,
1125 TP_ACPI_HKEY_VOLUP_MASK = 1 << TP_ACPI_HOTKEYSCAN_VOLUMEUP,
1126 TP_ACPI_HKEY_VOLDWN_MASK = 1 << TP_ACPI_HOTKEYSCAN_VOLUMEDOWN,
1127 TP_ACPI_HKEY_MUTE_MASK = 1 << TP_ACPI_HOTKEYSCAN_MUTE,
1128 TP_ACPI_HKEY_THINKPAD_MASK = 1 << TP_ACPI_HOTKEYSCAN_THINKPAD,
1129 };
1130
1131 enum { /* NVRAM to ACPI HKEY group map */
1132 TP_NVRAM_HKEY_GROUP_HK2 = TP_ACPI_HKEY_THINKPAD_MASK |
1133 TP_ACPI_HKEY_ZOOM_MASK |
1134 TP_ACPI_HKEY_DISPSWTCH_MASK |
1135 TP_ACPI_HKEY_HIBERNATE_MASK,
1136 TP_NVRAM_HKEY_GROUP_BRIGHTNESS = TP_ACPI_HKEY_BRGHTUP_MASK |
1137 TP_ACPI_HKEY_BRGHTDWN_MASK,
1138 TP_NVRAM_HKEY_GROUP_VOLUME = TP_ACPI_HKEY_VOLUP_MASK |
1139 TP_ACPI_HKEY_VOLDWN_MASK |
1140 TP_ACPI_HKEY_MUTE_MASK,
1141 };
1142
1143 #ifdef CONFIG_THINKPAD_ACPI_HOTKEY_POLL
1144 struct tp_nvram_state {
1145 u16 thinkpad_toggle:1;
1146 u16 zoom_toggle:1;
1147 u16 display_toggle:1;
1148 u16 thinklight_toggle:1;
1149 u16 hibernate_toggle:1;
1150 u16 displayexp_toggle:1;
1151 u16 display_state:1;
1152 u16 brightness_toggle:1;
1153 u16 volume_toggle:1;
1154 u16 mute:1;
1155
1156 u8 brightness_level;
1157 u8 volume_level;
1158 };
1159
1160 static struct task_struct *tpacpi_hotkey_task;
1161 static u32 hotkey_source_mask; /* bit mask 0=ACPI,1=NVRAM */
1162 static int hotkey_poll_freq = 10; /* Hz */
1163 static struct mutex hotkey_thread_mutex;
1164 static struct mutex hotkey_thread_data_mutex;
1165 static unsigned int hotkey_config_change;
1166
1167 #else /* CONFIG_THINKPAD_ACPI_HOTKEY_POLL */
1168
1169 #define hotkey_source_mask 0U
1170
1171 #endif /* CONFIG_THINKPAD_ACPI_HOTKEY_POLL */
1172
1173 static struct mutex hotkey_mutex;
1174
1175 static enum { /* Reasons for waking up */
1176 TP_ACPI_WAKEUP_NONE = 0, /* None or unknown */
1177 TP_ACPI_WAKEUP_BAYEJ, /* Bay ejection request */
1178 TP_ACPI_WAKEUP_UNDOCK, /* Undock request */
1179 } hotkey_wakeup_reason;
1180
1181 static int hotkey_autosleep_ack;
1182
1183 static int hotkey_orig_status;
1184 static u32 hotkey_orig_mask;
1185 static u32 hotkey_all_mask;
1186 static u32 hotkey_reserved_mask;
1187 static u32 hotkey_mask;
1188
1189 static unsigned int hotkey_report_mode;
1190
1191 static u16 *hotkey_keycode_map;
1192
1193 static struct attribute_set *hotkey_dev_attributes;
1194
1195 #ifdef CONFIG_THINKPAD_ACPI_HOTKEY_POLL
1196 #define HOTKEY_CONFIG_CRITICAL_START \
1197 do { \
1198 mutex_lock(&hotkey_thread_data_mutex); \
1199 hotkey_config_change++; \
1200 } while (0);
1201 #define HOTKEY_CONFIG_CRITICAL_END \
1202 mutex_unlock(&hotkey_thread_data_mutex);
1203 #else
1204 #define HOTKEY_CONFIG_CRITICAL_START
1205 #define HOTKEY_CONFIG_CRITICAL_END
1206 #endif /* CONFIG_THINKPAD_ACPI_HOTKEY_POLL */
1207
1208 /* HKEY.MHKG() return bits */
1209 #define TP_HOTKEY_TABLET_MASK (1 << 3)
1210
1211 static int hotkey_get_wlsw(int *status)
1212 {
1213 if (!acpi_evalf(hkey_handle, status, "WLSW", "d"))
1214 return -EIO;
1215 return 0;
1216 }
1217
1218 static int hotkey_get_tablet_mode(int *status)
1219 {
1220 int s;
1221
1222 if (!acpi_evalf(hkey_handle, &s, "MHKG", "d"))
1223 return -EIO;
1224
1225 *status = ((s & TP_HOTKEY_TABLET_MASK) != 0);
1226 return 0;
1227 }
1228
1229 /*
1230 * Call with hotkey_mutex held
1231 */
1232 static int hotkey_mask_get(void)
1233 {
1234 u32 m = 0;
1235
1236 if (tp_features.hotkey_mask) {
1237 if (!acpi_evalf(hkey_handle, &m, "DHKN", "d"))
1238 return -EIO;
1239 }
1240 hotkey_mask = m | (hotkey_source_mask & hotkey_mask);
1241
1242 return 0;
1243 }
1244
1245 /*
1246 * Call with hotkey_mutex held
1247 */
1248 static int hotkey_mask_set(u32 mask)
1249 {
1250 int i;
1251 int rc = 0;
1252
1253 if (tp_features.hotkey_mask) {
1254 if (!tp_warned.hotkey_mask_ff &&
1255 (mask == 0xffff || mask == 0xffffff ||
1256 mask == 0xffffffff)) {
1257 tp_warned.hotkey_mask_ff = 1;
1258 printk(TPACPI_NOTICE
1259 "setting the hotkey mask to 0x%08x is likely "
1260 "not the best way to go about it\n", mask);
1261 printk(TPACPI_NOTICE
1262 "please consider using the driver defaults, "
1263 "and refer to up-to-date thinkpad-acpi "
1264 "documentation\n");
1265 }
1266
1267 HOTKEY_CONFIG_CRITICAL_START
1268 for (i = 0; i < 32; i++) {
1269 u32 m = 1 << i;
1270 /* enable in firmware mask only keys not in NVRAM
1271 * mode, but enable the key in the cached hotkey_mask
1272 * regardless of mode, or the key will end up
1273 * disabled by hotkey_mask_get() */
1274 if (!acpi_evalf(hkey_handle,
1275 NULL, "MHKM", "vdd", i + 1,
1276 !!((mask & ~hotkey_source_mask) & m))) {
1277 rc = -EIO;
1278 break;
1279 } else {
1280 hotkey_mask = (hotkey_mask & ~m) | (mask & m);
1281 }
1282 }
1283 HOTKEY_CONFIG_CRITICAL_END
1284
1285 /* hotkey_mask_get must be called unconditionally below */
1286 if (!hotkey_mask_get() && !rc &&
1287 (hotkey_mask & ~hotkey_source_mask) !=
1288 (mask & ~hotkey_source_mask)) {
1289 printk(TPACPI_NOTICE
1290 "requested hot key mask 0x%08x, but "
1291 "firmware forced it to 0x%08x\n",
1292 mask, hotkey_mask);
1293 }
1294 } else {
1295 #ifdef CONFIG_THINKPAD_ACPI_HOTKEY_POLL
1296 HOTKEY_CONFIG_CRITICAL_START
1297 hotkey_mask = mask & hotkey_source_mask;
1298 HOTKEY_CONFIG_CRITICAL_END
1299 hotkey_mask_get();
1300 if (hotkey_mask != mask) {
1301 printk(TPACPI_NOTICE
1302 "requested hot key mask 0x%08x, "
1303 "forced to 0x%08x (NVRAM poll mask is "
1304 "0x%08x): no firmware mask support\n",
1305 mask, hotkey_mask, hotkey_source_mask);
1306 }
1307 #else
1308 hotkey_mask_get();
1309 rc = -ENXIO;
1310 #endif /* CONFIG_THINKPAD_ACPI_HOTKEY_POLL */
1311 }
1312
1313 return rc;
1314 }
1315
1316 static int hotkey_status_get(int *status)
1317 {
1318 if (!acpi_evalf(hkey_handle, status, "DHKC", "d"))
1319 return -EIO;
1320
1321 return 0;
1322 }
1323
1324 static int hotkey_status_set(int status)
1325 {
1326 if (!acpi_evalf(hkey_handle, NULL, "MHKC", "vd", status))
1327 return -EIO;
1328
1329 return 0;
1330 }
1331
1332 static void tpacpi_input_send_tabletsw(void)
1333 {
1334 int state;
1335
1336 if (tp_features.hotkey_tablet &&
1337 !hotkey_get_tablet_mode(&state)) {
1338 mutex_lock(&tpacpi_inputdev_send_mutex);
1339
1340 input_report_switch(tpacpi_inputdev,
1341 SW_TABLET_MODE, !!state);
1342 input_sync(tpacpi_inputdev);
1343
1344 mutex_unlock(&tpacpi_inputdev_send_mutex);
1345 }
1346 }
1347
1348 static void tpacpi_input_send_key(unsigned int scancode)
1349 {
1350 unsigned int keycode;
1351
1352 keycode = hotkey_keycode_map[scancode];
1353
1354 if (keycode != KEY_RESERVED) {
1355 mutex_lock(&tpacpi_inputdev_send_mutex);
1356
1357 input_report_key(tpacpi_inputdev, keycode, 1);
1358 if (keycode == KEY_UNKNOWN)
1359 input_event(tpacpi_inputdev, EV_MSC, MSC_SCAN,
1360 scancode);
1361 input_sync(tpacpi_inputdev);
1362
1363 input_report_key(tpacpi_inputdev, keycode, 0);
1364 if (keycode == KEY_UNKNOWN)
1365 input_event(tpacpi_inputdev, EV_MSC, MSC_SCAN,
1366 scancode);
1367 input_sync(tpacpi_inputdev);
1368
1369 mutex_unlock(&tpacpi_inputdev_send_mutex);
1370 }
1371 }
1372
1373 #ifdef CONFIG_THINKPAD_ACPI_HOTKEY_POLL
1374 static struct tp_acpi_drv_struct ibm_hotkey_acpidriver;
1375
1376 static void tpacpi_hotkey_send_key(unsigned int scancode)
1377 {
1378 tpacpi_input_send_key(scancode);
1379 if (hotkey_report_mode < 2) {
1380 acpi_bus_generate_proc_event(ibm_hotkey_acpidriver.device,
1381 0x80, 0x1001 + scancode);
1382 }
1383 }
1384
1385 static void hotkey_read_nvram(struct tp_nvram_state *n, u32 m)
1386 {
1387 u8 d;
1388
1389 if (m & TP_NVRAM_HKEY_GROUP_HK2) {
1390 d = nvram_read_byte(TP_NVRAM_ADDR_HK2);
1391 n->thinkpad_toggle = !!(d & TP_NVRAM_MASK_HKT_THINKPAD);
1392 n->zoom_toggle = !!(d & TP_NVRAM_MASK_HKT_ZOOM);
1393 n->display_toggle = !!(d & TP_NVRAM_MASK_HKT_DISPLAY);
1394 n->hibernate_toggle = !!(d & TP_NVRAM_MASK_HKT_HIBERNATE);
1395 }
1396 if (m & TP_ACPI_HKEY_THNKLGHT_MASK) {
1397 d = nvram_read_byte(TP_NVRAM_ADDR_THINKLIGHT);
1398 n->thinklight_toggle = !!(d & TP_NVRAM_MASK_THINKLIGHT);
1399 }
1400 if (m & TP_ACPI_HKEY_DISPXPAND_MASK) {
1401 d = nvram_read_byte(TP_NVRAM_ADDR_VIDEO);
1402 n->displayexp_toggle =
1403 !!(d & TP_NVRAM_MASK_HKT_DISPEXPND);
1404 }
1405 if (m & TP_NVRAM_HKEY_GROUP_BRIGHTNESS) {
1406 d = nvram_read_byte(TP_NVRAM_ADDR_BRIGHTNESS);
1407 n->brightness_level = (d & TP_NVRAM_MASK_LEVEL_BRIGHTNESS)
1408 >> TP_NVRAM_POS_LEVEL_BRIGHTNESS;
1409 n->brightness_toggle =
1410 !!(d & TP_NVRAM_MASK_HKT_BRIGHTNESS);
1411 }
1412 if (m & TP_NVRAM_HKEY_GROUP_VOLUME) {
1413 d = nvram_read_byte(TP_NVRAM_ADDR_MIXER);
1414 n->volume_level = (d & TP_NVRAM_MASK_LEVEL_VOLUME)
1415 >> TP_NVRAM_POS_LEVEL_VOLUME;
1416 n->mute = !!(d & TP_NVRAM_MASK_MUTE);
1417 n->volume_toggle = !!(d & TP_NVRAM_MASK_HKT_VOLUME);
1418 }
1419 }
1420
1421 #define TPACPI_COMPARE_KEY(__scancode, __member) \
1422 do { \
1423 if ((mask & (1 << __scancode)) && \
1424 oldn->__member != newn->__member) \
1425 tpacpi_hotkey_send_key(__scancode); \
1426 } while (0)
1427
1428 #define TPACPI_MAY_SEND_KEY(__scancode) \
1429 do { if (mask & (1 << __scancode)) \
1430 tpacpi_hotkey_send_key(__scancode); } while (0)
1431
1432 static void hotkey_compare_and_issue_event(struct tp_nvram_state *oldn,
1433 struct tp_nvram_state *newn,
1434 u32 mask)
1435 {
1436 TPACPI_COMPARE_KEY(TP_ACPI_HOTKEYSCAN_THINKPAD, thinkpad_toggle);
1437 TPACPI_COMPARE_KEY(TP_ACPI_HOTKEYSCAN_FNSPACE, zoom_toggle);
1438 TPACPI_COMPARE_KEY(TP_ACPI_HOTKEYSCAN_FNF7, display_toggle);
1439 TPACPI_COMPARE_KEY(TP_ACPI_HOTKEYSCAN_FNF12, hibernate_toggle);
1440
1441 TPACPI_COMPARE_KEY(TP_ACPI_HOTKEYSCAN_FNPAGEUP, thinklight_toggle);
1442
1443 TPACPI_COMPARE_KEY(TP_ACPI_HOTKEYSCAN_FNF8, displayexp_toggle);
1444
1445 /* handle volume */
1446 if (oldn->volume_toggle != newn->volume_toggle) {
1447 if (oldn->mute != newn->mute) {
1448 TPACPI_MAY_SEND_KEY(TP_ACPI_HOTKEYSCAN_MUTE);
1449 }
1450 if (oldn->volume_level > newn->volume_level) {
1451 TPACPI_MAY_SEND_KEY(TP_ACPI_HOTKEYSCAN_VOLUMEDOWN);
1452 } else if (oldn->volume_level < newn->volume_level) {
1453 TPACPI_MAY_SEND_KEY(TP_ACPI_HOTKEYSCAN_VOLUMEUP);
1454 } else if (oldn->mute == newn->mute) {
1455 /* repeated key presses that didn't change state */
1456 if (newn->mute) {
1457 TPACPI_MAY_SEND_KEY(TP_ACPI_HOTKEYSCAN_MUTE);
1458 } else if (newn->volume_level != 0) {
1459 TPACPI_MAY_SEND_KEY(TP_ACPI_HOTKEYSCAN_VOLUMEUP);
1460 } else {
1461 TPACPI_MAY_SEND_KEY(TP_ACPI_HOTKEYSCAN_VOLUMEDOWN);
1462 }
1463 }
1464 }
1465
1466 /* handle brightness */
1467 if (oldn->brightness_toggle != newn->brightness_toggle) {
1468 if (oldn->brightness_level < newn->brightness_level) {
1469 TPACPI_MAY_SEND_KEY(TP_ACPI_HOTKEYSCAN_FNHOME);
1470 } else if (oldn->brightness_level > newn->brightness_level) {
1471 TPACPI_MAY_SEND_KEY(TP_ACPI_HOTKEYSCAN_FNEND);
1472 } else {
1473 /* repeated key presses that didn't change state */
1474 if (newn->brightness_level != 0) {
1475 TPACPI_MAY_SEND_KEY(TP_ACPI_HOTKEYSCAN_FNHOME);
1476 } else {
1477 TPACPI_MAY_SEND_KEY(TP_ACPI_HOTKEYSCAN_FNEND);
1478 }
1479 }
1480 }
1481 }
1482
1483 #undef TPACPI_COMPARE_KEY
1484 #undef TPACPI_MAY_SEND_KEY
1485
1486 static int hotkey_kthread(void *data)
1487 {
1488 struct tp_nvram_state s[2];
1489 u32 mask;
1490 unsigned int si, so;
1491 unsigned long t;
1492 unsigned int change_detector, must_reset;
1493
1494 mutex_lock(&hotkey_thread_mutex);
1495
1496 if (tpacpi_lifecycle == TPACPI_LIFE_EXITING)
1497 goto exit;
1498
1499 set_freezable();
1500
1501 so = 0;
1502 si = 1;
1503 t = 0;
1504
1505 /* Initial state for compares */
1506 mutex_lock(&hotkey_thread_data_mutex);
1507 change_detector = hotkey_config_change;
1508 mask = hotkey_source_mask & hotkey_mask;
1509 mutex_unlock(&hotkey_thread_data_mutex);
1510 hotkey_read_nvram(&s[so], mask);
1511
1512 while (!kthread_should_stop() && hotkey_poll_freq) {
1513 if (t == 0)
1514 t = 1000/hotkey_poll_freq;
1515 t = msleep_interruptible(t);
1516 if (unlikely(kthread_should_stop()))
1517 break;
1518 must_reset = try_to_freeze();
1519 if (t > 0 && !must_reset)
1520 continue;
1521
1522 mutex_lock(&hotkey_thread_data_mutex);
1523 if (must_reset || hotkey_config_change != change_detector) {
1524 /* forget old state on thaw or config change */
1525 si = so;
1526 t = 0;
1527 change_detector = hotkey_config_change;
1528 }
1529 mask = hotkey_source_mask & hotkey_mask;
1530 mutex_unlock(&hotkey_thread_data_mutex);
1531
1532 if (likely(mask)) {
1533 hotkey_read_nvram(&s[si], mask);
1534 if (likely(si != so)) {
1535 hotkey_compare_and_issue_event(&s[so], &s[si],
1536 mask);
1537 }
1538 }
1539
1540 so = si;
1541 si ^= 1;
1542 }
1543
1544 exit:
1545 mutex_unlock(&hotkey_thread_mutex);
1546 return 0;
1547 }
1548
1549 static void hotkey_poll_stop_sync(void)
1550 {
1551 if (tpacpi_hotkey_task) {
1552 if (frozen(tpacpi_hotkey_task) ||
1553 freezing(tpacpi_hotkey_task))
1554 thaw_process(tpacpi_hotkey_task);
1555
1556 kthread_stop(tpacpi_hotkey_task);
1557 tpacpi_hotkey_task = NULL;
1558 mutex_lock(&hotkey_thread_mutex);
1559 /* at this point, the thread did exit */
1560 mutex_unlock(&hotkey_thread_mutex);
1561 }
1562 }
1563
1564 /* call with hotkey_mutex held */
1565 static void hotkey_poll_setup(int may_warn)
1566 {
1567 if ((hotkey_source_mask & hotkey_mask) != 0 &&
1568 hotkey_poll_freq > 0 &&
1569 (tpacpi_inputdev->users > 0 || hotkey_report_mode < 2)) {
1570 if (!tpacpi_hotkey_task) {
1571 tpacpi_hotkey_task = kthread_run(hotkey_kthread,
1572 NULL, TPACPI_NVRAM_KTHREAD_NAME);
1573 if (IS_ERR(tpacpi_hotkey_task)) {
1574 tpacpi_hotkey_task = NULL;
1575 printk(TPACPI_ERR
1576 "could not create kernel thread "
1577 "for hotkey polling\n");
1578 }
1579 }
1580 } else {
1581 hotkey_poll_stop_sync();
1582 if (may_warn &&
1583 hotkey_source_mask != 0 && hotkey_poll_freq == 0) {
1584 printk(TPACPI_NOTICE
1585 "hot keys 0x%08x require polling, "
1586 "which is currently disabled\n",
1587 hotkey_source_mask);
1588 }
1589 }
1590 }
1591
1592 static void hotkey_poll_setup_safe(int may_warn)
1593 {
1594 mutex_lock(&hotkey_mutex);
1595 hotkey_poll_setup(may_warn);
1596 mutex_unlock(&hotkey_mutex);
1597 }
1598
1599 #else /* CONFIG_THINKPAD_ACPI_HOTKEY_POLL */
1600
1601 static void hotkey_poll_setup_safe(int __unused)
1602 {
1603 }
1604
1605 #endif /* CONFIG_THINKPAD_ACPI_HOTKEY_POLL */
1606
1607 static int hotkey_inputdev_open(struct input_dev *dev)
1608 {
1609 switch (tpacpi_lifecycle) {
1610 case TPACPI_LIFE_INIT:
1611 /*
1612 * hotkey_init will call hotkey_poll_setup_safe
1613 * at the appropriate moment
1614 */
1615 return 0;
1616 case TPACPI_LIFE_EXITING:
1617 return -EBUSY;
1618 case TPACPI_LIFE_RUNNING:
1619 hotkey_poll_setup_safe(0);
1620 return 0;
1621 }
1622
1623 /* Should only happen if tpacpi_lifecycle is corrupt */
1624 BUG();
1625 return -EBUSY;
1626 }
1627
1628 static void hotkey_inputdev_close(struct input_dev *dev)
1629 {
1630 /* disable hotkey polling when possible */
1631 if (tpacpi_lifecycle == TPACPI_LIFE_RUNNING)
1632 hotkey_poll_setup_safe(0);
1633 }
1634
1635 /* sysfs hotkey enable ------------------------------------------------- */
1636 static ssize_t hotkey_enable_show(struct device *dev,
1637 struct device_attribute *attr,
1638 char *buf)
1639 {
1640 int res, status;
1641
1642 res = hotkey_status_get(&status);
1643 if (res)
1644 return res;
1645
1646 return snprintf(buf, PAGE_SIZE, "%d\n", status);
1647 }
1648
1649 static ssize_t hotkey_enable_store(struct device *dev,
1650 struct device_attribute *attr,
1651 const char *buf, size_t count)
1652 {
1653 unsigned long t;
1654 int res;
1655
1656 if (parse_strtoul(buf, 1, &t))
1657 return -EINVAL;
1658
1659 res = hotkey_status_set(t);
1660
1661 return (res) ? res : count;
1662 }
1663
1664 static struct device_attribute dev_attr_hotkey_enable =
1665 __ATTR(hotkey_enable, S_IWUSR | S_IRUGO,
1666 hotkey_enable_show, hotkey_enable_store);
1667
1668 /* sysfs hotkey mask --------------------------------------------------- */
1669 static ssize_t hotkey_mask_show(struct device *dev,
1670 struct device_attribute *attr,
1671 char *buf)
1672 {
1673 int res;
1674
1675 if (mutex_lock_interruptible(&hotkey_mutex))
1676 return -ERESTARTSYS;
1677 res = hotkey_mask_get();
1678 mutex_unlock(&hotkey_mutex);
1679
1680 return (res)?
1681 res : snprintf(buf, PAGE_SIZE, "0x%08x\n", hotkey_mask);
1682 }
1683
1684 static ssize_t hotkey_mask_store(struct device *dev,
1685 struct device_attribute *attr,
1686 const char *buf, size_t count)
1687 {
1688 unsigned long t;
1689 int res;
1690
1691 if (parse_strtoul(buf, 0xffffffffUL, &t))
1692 return -EINVAL;
1693
1694 if (mutex_lock_interruptible(&hotkey_mutex))
1695 return -ERESTARTSYS;
1696
1697 res = hotkey_mask_set(t);
1698
1699 #ifdef CONFIG_THINKPAD_ACPI_HOTKEY_POLL
1700 hotkey_poll_setup(1);
1701 #endif
1702
1703 mutex_unlock(&hotkey_mutex);
1704
1705 return (res) ? res : count;
1706 }
1707
1708 static struct device_attribute dev_attr_hotkey_mask =
1709 __ATTR(hotkey_mask, S_IWUSR | S_IRUGO,
1710 hotkey_mask_show, hotkey_mask_store);
1711
1712 /* sysfs hotkey bios_enabled ------------------------------------------- */
1713 static ssize_t hotkey_bios_enabled_show(struct device *dev,
1714 struct device_attribute *attr,
1715 char *buf)
1716 {
1717 return snprintf(buf, PAGE_SIZE, "%d\n", hotkey_orig_status);
1718 }
1719
1720 static struct device_attribute dev_attr_hotkey_bios_enabled =
1721 __ATTR(hotkey_bios_enabled, S_IRUGO, hotkey_bios_enabled_show, NULL);
1722
1723 /* sysfs hotkey bios_mask ---------------------------------------------- */
1724 static ssize_t hotkey_bios_mask_show(struct device *dev,
1725 struct device_attribute *attr,
1726 char *buf)
1727 {
1728 return snprintf(buf, PAGE_SIZE, "0x%08x\n", hotkey_orig_mask);
1729 }
1730
1731 static struct device_attribute dev_attr_hotkey_bios_mask =
1732 __ATTR(hotkey_bios_mask, S_IRUGO, hotkey_bios_mask_show, NULL);
1733
1734 /* sysfs hotkey all_mask ----------------------------------------------- */
1735 static ssize_t hotkey_all_mask_show(struct device *dev,
1736 struct device_attribute *attr,
1737 char *buf)
1738 {
1739 return snprintf(buf, PAGE_SIZE, "0x%08x\n",
1740 hotkey_all_mask | hotkey_source_mask);
1741 }
1742
1743 static struct device_attribute dev_attr_hotkey_all_mask =
1744 __ATTR(hotkey_all_mask, S_IRUGO, hotkey_all_mask_show, NULL);
1745
1746 /* sysfs hotkey recommended_mask --------------------------------------- */
1747 static ssize_t hotkey_recommended_mask_show(struct device *dev,
1748 struct device_attribute *attr,
1749 char *buf)
1750 {
1751 return snprintf(buf, PAGE_SIZE, "0x%08x\n",
1752 (hotkey_all_mask | hotkey_source_mask)
1753 & ~hotkey_reserved_mask);
1754 }
1755
1756 static struct device_attribute dev_attr_hotkey_recommended_mask =
1757 __ATTR(hotkey_recommended_mask, S_IRUGO,
1758 hotkey_recommended_mask_show, NULL);
1759
1760 #ifdef CONFIG_THINKPAD_ACPI_HOTKEY_POLL
1761
1762 /* sysfs hotkey hotkey_source_mask ------------------------------------- */
1763 static ssize_t hotkey_source_mask_show(struct device *dev,
1764 struct device_attribute *attr,
1765 char *buf)
1766 {
1767 return snprintf(buf, PAGE_SIZE, "0x%08x\n", hotkey_source_mask);
1768 }
1769
1770 static ssize_t hotkey_source_mask_store(struct device *dev,
1771 struct device_attribute *attr,
1772 const char *buf, size_t count)
1773 {
1774 unsigned long t;
1775
1776 if (parse_strtoul(buf, 0xffffffffUL, &t) ||
1777 ((t & ~TPACPI_HKEY_NVRAM_KNOWN_MASK) != 0))
1778 return -EINVAL;
1779
1780 if (mutex_lock_interruptible(&hotkey_mutex))
1781 return -ERESTARTSYS;
1782
1783 HOTKEY_CONFIG_CRITICAL_START
1784 hotkey_source_mask = t;
1785 HOTKEY_CONFIG_CRITICAL_END
1786
1787 hotkey_poll_setup(1);
1788
1789 mutex_unlock(&hotkey_mutex);
1790
1791 return count;
1792 }
1793
1794 static struct device_attribute dev_attr_hotkey_source_mask =
1795 __ATTR(hotkey_source_mask, S_IWUSR | S_IRUGO,
1796 hotkey_source_mask_show, hotkey_source_mask_store);
1797
1798 /* sysfs hotkey hotkey_poll_freq --------------------------------------- */
1799 static ssize_t hotkey_poll_freq_show(struct device *dev,
1800 struct device_attribute *attr,
1801 char *buf)
1802 {
1803 return snprintf(buf, PAGE_SIZE, "%d\n", hotkey_poll_freq);
1804 }
1805
1806 static ssize_t hotkey_poll_freq_store(struct device *dev,
1807 struct device_attribute *attr,
1808 const char *buf, size_t count)
1809 {
1810 unsigned long t;
1811
1812 if (parse_strtoul(buf, 25, &t))
1813 return -EINVAL;
1814
1815 if (mutex_lock_interruptible(&hotkey_mutex))
1816 return -ERESTARTSYS;
1817
1818 hotkey_poll_freq = t;
1819
1820 hotkey_poll_setup(1);
1821 mutex_unlock(&hotkey_mutex);
1822
1823 return count;
1824 }
1825
1826 static struct device_attribute dev_attr_hotkey_poll_freq =
1827 __ATTR(hotkey_poll_freq, S_IWUSR | S_IRUGO,
1828 hotkey_poll_freq_show, hotkey_poll_freq_store);
1829
1830 #endif /* CONFIG_THINKPAD_ACPI_HOTKEY_POLL */
1831
1832 /* sysfs hotkey radio_sw (pollable) ------------------------------------ */
1833 static ssize_t hotkey_radio_sw_show(struct device *dev,
1834 struct device_attribute *attr,
1835 char *buf)
1836 {
1837 int res, s;
1838 res = hotkey_get_wlsw(&s);
1839 if (res < 0)
1840 return res;
1841
1842 return snprintf(buf, PAGE_SIZE, "%d\n", !!s);
1843 }
1844
1845 static struct device_attribute dev_attr_hotkey_radio_sw =
1846 __ATTR(hotkey_radio_sw, S_IRUGO, hotkey_radio_sw_show, NULL);
1847
1848 static void hotkey_radio_sw_notify_change(void)
1849 {
1850 if (tp_features.hotkey_wlsw)
1851 sysfs_notify(&tpacpi_pdev->dev.kobj, NULL,
1852 "hotkey_radio_sw");
1853 }
1854
1855 /* sysfs hotkey tablet mode (pollable) --------------------------------- */
1856 static ssize_t hotkey_tablet_mode_show(struct device *dev,
1857 struct device_attribute *attr,
1858 char *buf)
1859 {
1860 int res, s;
1861 res = hotkey_get_tablet_mode(&s);
1862 if (res < 0)
1863 return res;
1864
1865 return snprintf(buf, PAGE_SIZE, "%d\n", !!s);
1866 }
1867
1868 static struct device_attribute dev_attr_hotkey_tablet_mode =
1869 __ATTR(hotkey_tablet_mode, S_IRUGO, hotkey_tablet_mode_show, NULL);
1870
1871 static void hotkey_tablet_mode_notify_change(void)
1872 {
1873 if (tp_features.hotkey_tablet)
1874 sysfs_notify(&tpacpi_pdev->dev.kobj, NULL,
1875 "hotkey_tablet_mode");
1876 }
1877
1878 /* sysfs hotkey report_mode -------------------------------------------- */
1879 static ssize_t hotkey_report_mode_show(struct device *dev,
1880 struct device_attribute *attr,
1881 char *buf)
1882 {
1883 return snprintf(buf, PAGE_SIZE, "%d\n",
1884 (hotkey_report_mode != 0) ? hotkey_report_mode : 1);
1885 }
1886
1887 static struct device_attribute dev_attr_hotkey_report_mode =
1888 __ATTR(hotkey_report_mode, S_IRUGO, hotkey_report_mode_show, NULL);
1889
1890 /* sysfs wakeup reason (pollable) -------------------------------------- */
1891 static ssize_t hotkey_wakeup_reason_show(struct device *dev,
1892 struct device_attribute *attr,
1893 char *buf)
1894 {
1895 return snprintf(buf, PAGE_SIZE, "%d\n", hotkey_wakeup_reason);
1896 }
1897
1898 static struct device_attribute dev_attr_hotkey_wakeup_reason =
1899 __ATTR(wakeup_reason, S_IRUGO, hotkey_wakeup_reason_show, NULL);
1900
1901 static void hotkey_wakeup_reason_notify_change(void)
1902 {
1903 if (tp_features.hotkey_mask)
1904 sysfs_notify(&tpacpi_pdev->dev.kobj, NULL,
1905 "wakeup_reason");
1906 }
1907
1908 /* sysfs wakeup hotunplug_complete (pollable) -------------------------- */
1909 static ssize_t hotkey_wakeup_hotunplug_complete_show(struct device *dev,
1910 struct device_attribute *attr,
1911 char *buf)
1912 {
1913 return snprintf(buf, PAGE_SIZE, "%d\n", hotkey_autosleep_ack);
1914 }
1915
1916 static struct device_attribute dev_attr_hotkey_wakeup_hotunplug_complete =
1917 __ATTR(wakeup_hotunplug_complete, S_IRUGO,
1918 hotkey_wakeup_hotunplug_complete_show, NULL);
1919
1920 static void hotkey_wakeup_hotunplug_complete_notify_change(void)
1921 {
1922 if (tp_features.hotkey_mask)
1923 sysfs_notify(&tpacpi_pdev->dev.kobj, NULL,
1924 "wakeup_hotunplug_complete");
1925 }
1926
1927 /* --------------------------------------------------------------------- */
1928
1929 static struct attribute *hotkey_attributes[] __initdata = {
1930 &dev_attr_hotkey_enable.attr,
1931 &dev_attr_hotkey_bios_enabled.attr,
1932 &dev_attr_hotkey_report_mode.attr,
1933 #ifdef CONFIG_THINKPAD_ACPI_HOTKEY_POLL
1934 &dev_attr_hotkey_mask.attr,
1935 &dev_attr_hotkey_all_mask.attr,
1936 &dev_attr_hotkey_recommended_mask.attr,
1937 &dev_attr_hotkey_source_mask.attr,
1938 &dev_attr_hotkey_poll_freq.attr,
1939 #endif
1940 };
1941
1942 static struct attribute *hotkey_mask_attributes[] __initdata = {
1943 &dev_attr_hotkey_bios_mask.attr,
1944 #ifndef CONFIG_THINKPAD_ACPI_HOTKEY_POLL
1945 &dev_attr_hotkey_mask.attr,
1946 &dev_attr_hotkey_all_mask.attr,
1947 &dev_attr_hotkey_recommended_mask.attr,
1948 #endif
1949 &dev_attr_hotkey_wakeup_reason.attr,
1950 &dev_attr_hotkey_wakeup_hotunplug_complete.attr,
1951 };
1952
1953 static void bluetooth_update_rfk(void);
1954 static void wan_update_rfk(void);
1955 static void tpacpi_send_radiosw_update(void)
1956 {
1957 int wlsw;
1958
1959 /* Sync these BEFORE sending any rfkill events */
1960 if (tp_features.bluetooth)
1961 bluetooth_update_rfk();
1962 if (tp_features.wan)
1963 wan_update_rfk();
1964
1965 if (tp_features.hotkey_wlsw && !hotkey_get_wlsw(&wlsw)) {
1966 mutex_lock(&tpacpi_inputdev_send_mutex);
1967
1968 input_report_switch(tpacpi_inputdev,
1969 SW_RFKILL_ALL, !!wlsw);
1970 input_sync(tpacpi_inputdev);
1971
1972 mutex_unlock(&tpacpi_inputdev_send_mutex);
1973 }
1974 hotkey_radio_sw_notify_change();
1975 }
1976
1977 static void hotkey_exit(void)
1978 {
1979 #ifdef CONFIG_THINKPAD_ACPI_HOTKEY_POLL
1980 hotkey_poll_stop_sync();
1981 #endif
1982
1983 if (hotkey_dev_attributes)
1984 delete_attr_set(hotkey_dev_attributes, &tpacpi_pdev->dev.kobj);
1985
1986 kfree(hotkey_keycode_map);
1987
1988 if (tp_features.hotkey) {
1989 dbg_printk(TPACPI_DBG_EXIT,
1990 "restoring original hot key mask\n");
1991 /* no short-circuit boolean operator below! */
1992 if ((hotkey_mask_set(hotkey_orig_mask) |
1993 hotkey_status_set(hotkey_orig_status)) != 0)
1994 printk(TPACPI_ERR
1995 "failed to restore hot key mask "
1996 "to BIOS defaults\n");
1997 }
1998 }
1999
2000 static int __init hotkey_init(struct ibm_init_struct *iibm)
2001 {
2002 /* Requirements for changing the default keymaps:
2003 *
2004 * 1. Many of the keys are mapped to KEY_RESERVED for very
2005 * good reasons. Do not change them unless you have deep
2006 * knowledge on the IBM and Lenovo ThinkPad firmware for
2007 * the various ThinkPad models. The driver behaves
2008 * differently for KEY_RESERVED: such keys have their
2009 * hot key mask *unset* in mask_recommended, and also
2010 * in the initial hot key mask programmed into the
2011 * firmware at driver load time, which means the firm-
2012 * ware may react very differently if you change them to
2013 * something else;
2014 *
2015 * 2. You must be subscribed to the linux-thinkpad and
2016 * ibm-acpi-devel mailing lists, and you should read the
2017 * list archives since 2007 if you want to change the
2018 * keymaps. This requirement exists so that you will
2019 * know the past history of problems with the thinkpad-
2020 * acpi driver keymaps, and also that you will be
2021 * listening to any bug reports;
2022 *
2023 * 3. Do not send thinkpad-acpi specific patches directly to
2024 * for merging, *ever*. Send them to the linux-acpi
2025 * mailinglist for comments. Merging is to be done only
2026 * through acpi-test and the ACPI maintainer.
2027 *
2028 * If the above is too much to ask, don't change the keymap.
2029 * Ask the thinkpad-acpi maintainer to do it, instead.
2030 */
2031 static u16 ibm_keycode_map[] __initdata = {
2032 /* Scan Codes 0x00 to 0x0B: ACPI HKEY FN+F1..F12 */
2033 KEY_FN_F1, KEY_FN_F2, KEY_COFFEE, KEY_SLEEP,
2034 KEY_WLAN, KEY_FN_F6, KEY_SWITCHVIDEOMODE, KEY_FN_F8,
2035 KEY_FN_F9, KEY_FN_F10, KEY_FN_F11, KEY_SUSPEND,
2036
2037 /* Scan codes 0x0C to 0x1F: Other ACPI HKEY hot keys */
2038 KEY_UNKNOWN, /* 0x0C: FN+BACKSPACE */
2039 KEY_UNKNOWN, /* 0x0D: FN+INSERT */
2040 KEY_UNKNOWN, /* 0x0E: FN+DELETE */
2041
2042 /* brightness: firmware always reacts to them, unless
2043 * X.org did some tricks in the radeon BIOS scratch
2044 * registers of *some* models */
2045 KEY_RESERVED, /* 0x0F: FN+HOME (brightness up) */
2046 KEY_RESERVED, /* 0x10: FN+END (brightness down) */
2047
2048 /* Thinklight: firmware always react to it */
2049 KEY_RESERVED, /* 0x11: FN+PGUP (thinklight toggle) */
2050
2051 KEY_UNKNOWN, /* 0x12: FN+PGDOWN */
2052 KEY_ZOOM, /* 0x13: FN+SPACE (zoom) */
2053
2054 /* Volume: firmware always react to it and reprograms
2055 * the built-in *extra* mixer. Never map it to control
2056 * another mixer by default. */
2057 KEY_RESERVED, /* 0x14: VOLUME UP */
2058 KEY_RESERVED, /* 0x15: VOLUME DOWN */
2059 KEY_RESERVED, /* 0x16: MUTE */
2060
2061 KEY_VENDOR, /* 0x17: Thinkpad/AccessIBM/Lenovo */
2062
2063 /* (assignments unknown, please report if found) */
2064 KEY_UNKNOWN, KEY_UNKNOWN, KEY_UNKNOWN, KEY_UNKNOWN,
2065 KEY_UNKNOWN, KEY_UNKNOWN, KEY_UNKNOWN, KEY_UNKNOWN,
2066 };
2067 static u16 lenovo_keycode_map[] __initdata = {
2068 /* Scan Codes 0x00 to 0x0B: ACPI HKEY FN+F1..F12 */
2069 KEY_FN_F1, KEY_COFFEE, KEY_BATTERY, KEY_SLEEP,
2070 KEY_WLAN, KEY_FN_F6, KEY_SWITCHVIDEOMODE, KEY_FN_F8,
2071 KEY_FN_F9, KEY_FN_F10, KEY_FN_F11, KEY_SUSPEND,
2072
2073 /* Scan codes 0x0C to 0x1F: Other ACPI HKEY hot keys */
2074 KEY_UNKNOWN, /* 0x0C: FN+BACKSPACE */
2075 KEY_UNKNOWN, /* 0x0D: FN+INSERT */
2076 KEY_UNKNOWN, /* 0x0E: FN+DELETE */
2077
2078 /* These either have to go through ACPI video, or
2079 * act like in the IBM ThinkPads, so don't ever
2080 * enable them by default */
2081 KEY_RESERVED, /* 0x0F: FN+HOME (brightness up) */
2082 KEY_RESERVED, /* 0x10: FN+END (brightness down) */
2083
2084 KEY_RESERVED, /* 0x11: FN+PGUP (thinklight toggle) */
2085
2086 KEY_UNKNOWN, /* 0x12: FN+PGDOWN */
2087 KEY_ZOOM, /* 0x13: FN+SPACE (zoom) */
2088
2089 /* Volume: z60/z61, T60 (BIOS version?): firmware always
2090 * react to it and reprograms the built-in *extra* mixer.
2091 * Never map it to control another mixer by default.
2092 *
2093 * T60?, T61, R60?, R61: firmware and EC tries to send
2094 * these over the regular keyboard, so these are no-ops,
2095 * but there are still weird bugs re. MUTE, so do not
2096 * change unless you get test reports from all Lenovo
2097 * models. May cause the BIOS to interfere with the
2098 * HDA mixer.
2099 */
2100 KEY_RESERVED, /* 0x14: VOLUME UP */
2101 KEY_RESERVED, /* 0x15: VOLUME DOWN */
2102 KEY_RESERVED, /* 0x16: MUTE */
2103
2104 KEY_VENDOR, /* 0x17: Thinkpad/AccessIBM/Lenovo */
2105
2106 /* (assignments unknown, please report if found) */
2107 KEY_UNKNOWN, KEY_UNKNOWN, KEY_UNKNOWN, KEY_UNKNOWN,
2108 KEY_UNKNOWN, KEY_UNKNOWN, KEY_UNKNOWN, KEY_UNKNOWN,
2109 };
2110
2111 #define TPACPI_HOTKEY_MAP_LEN ARRAY_SIZE(ibm_keycode_map)
2112 #define TPACPI_HOTKEY_MAP_SIZE sizeof(ibm_keycode_map)
2113 #define TPACPI_HOTKEY_MAP_TYPESIZE sizeof(ibm_keycode_map[0])
2114
2115 int res, i;
2116 int status;
2117 int hkeyv;
2118
2119 vdbg_printk(TPACPI_DBG_INIT, "initializing hotkey subdriver\n");
2120
2121 BUG_ON(!tpacpi_inputdev);
2122 BUG_ON(tpacpi_inputdev->open != NULL ||
2123 tpacpi_inputdev->close != NULL);
2124
2125 TPACPI_ACPIHANDLE_INIT(hkey);
2126 mutex_init(&hotkey_mutex);
2127
2128 #ifdef CONFIG_THINKPAD_ACPI_HOTKEY_POLL
2129 mutex_init(&hotkey_thread_mutex);
2130 mutex_init(&hotkey_thread_data_mutex);
2131 #endif
2132
2133 /* hotkey not supported on 570 */
2134 tp_features.hotkey = hkey_handle != NULL;
2135
2136 vdbg_printk(TPACPI_DBG_INIT, "hotkeys are %s\n",
2137 str_supported(tp_features.hotkey));
2138
2139 if (!tp_features.hotkey)
2140 return 1;
2141
2142 hotkey_dev_attributes = create_attr_set(13, NULL);
2143 if (!hotkey_dev_attributes)
2144 return -ENOMEM;
2145 res = add_many_to_attr_set(hotkey_dev_attributes,
2146 hotkey_attributes,
2147 ARRAY_SIZE(hotkey_attributes));
2148 if (res)
2149 goto err_exit;
2150
2151 /* mask not supported on 570, 600e/x, 770e, 770x, A21e, A2xm/p,
2152 A30, R30, R31, T20-22, X20-21, X22-24. Detected by checking
2153 for HKEY interface version 0x100 */
2154 if (acpi_evalf(hkey_handle, &hkeyv, "MHKV", "qd")) {
2155 if ((hkeyv >> 8) != 1) {
2156 printk(TPACPI_ERR "unknown version of the "
2157 "HKEY interface: 0x%x\n", hkeyv);
2158 printk(TPACPI_ERR "please report this to %s\n",
2159 TPACPI_MAIL);
2160 } else {
2161 /*
2162 * MHKV 0x100 in A31, R40, R40e,
2163 * T4x, X31, and later
2164 */
2165 tp_features.hotkey_mask = 1;
2166 }
2167 }
2168
2169 vdbg_printk(TPACPI_DBG_INIT, "hotkey masks are %s\n",
2170 str_supported(tp_features.hotkey_mask));
2171
2172 if (tp_features.hotkey_mask) {
2173 if (!acpi_evalf(hkey_handle, &hotkey_all_mask,
2174 "MHKA", "qd")) {
2175 printk(TPACPI_ERR
2176 "missing MHKA handler, "
2177 "please report this to %s\n",
2178 TPACPI_MAIL);
2179 /* FN+F12, FN+F4, FN+F3 */
2180 hotkey_all_mask = 0x080cU;
2181 }
2182 }
2183
2184 /* hotkey_source_mask *must* be zero for
2185 * the first hotkey_mask_get */
2186 res = hotkey_status_get(&hotkey_orig_status);
2187 if (res)
2188 goto err_exit;
2189
2190 if (tp_features.hotkey_mask) {
2191 res = hotkey_mask_get();
2192 if (res)
2193 goto err_exit;
2194
2195 hotkey_orig_mask = hotkey_mask;
2196 res = add_many_to_attr_set(
2197 hotkey_dev_attributes,
2198 hotkey_mask_attributes,
2199 ARRAY_SIZE(hotkey_mask_attributes));
2200 if (res)
2201 goto err_exit;
2202 }
2203
2204 #ifdef CONFIG_THINKPAD_ACPI_HOTKEY_POLL
2205 if (tp_features.hotkey_mask) {
2206 hotkey_source_mask = TPACPI_HKEY_NVRAM_GOOD_MASK
2207 & ~hotkey_all_mask;
2208 } else {
2209 hotkey_source_mask = TPACPI_HKEY_NVRAM_GOOD_MASK;
2210 }
2211
2212 vdbg_printk(TPACPI_DBG_INIT,
2213 "hotkey source mask 0x%08x, polling freq %d\n",
2214 hotkey_source_mask, hotkey_poll_freq);
2215 #endif
2216
2217 /* Not all thinkpads have a hardware radio switch */
2218 if (acpi_evalf(hkey_handle, &status, "WLSW", "qd")) {
2219 tp_features.hotkey_wlsw = 1;
2220 printk(TPACPI_INFO
2221 "radio switch found; radios are %s\n",
2222 enabled(status, 0));
2223 }
2224 if (tp_features.hotkey_wlsw)
2225 res = add_to_attr_set(hotkey_dev_attributes,
2226 &dev_attr_hotkey_radio_sw.attr);
2227
2228 /* For X41t, X60t, X61t Tablets... */
2229 if (!res && acpi_evalf(hkey_handle, &status, "MHKG", "qd")) {
2230 tp_features.hotkey_tablet = 1;
2231 printk(TPACPI_INFO
2232 "possible tablet mode switch found; "
2233 "ThinkPad in %s mode\n",
2234 (status & TP_HOTKEY_TABLET_MASK)?
2235 "tablet" : "laptop");
2236 res = add_to_attr_set(hotkey_dev_attributes,
2237 &dev_attr_hotkey_tablet_mode.attr);
2238 }
2239
2240 if (!res)
2241 res = register_attr_set_with_sysfs(
2242 hotkey_dev_attributes,
2243 &tpacpi_pdev->dev.kobj);
2244 if (res)
2245 goto err_exit;
2246
2247 /* Set up key map */
2248
2249 hotkey_keycode_map = kmalloc(TPACPI_HOTKEY_MAP_SIZE,
2250 GFP_KERNEL);
2251 if (!hotkey_keycode_map) {
2252 printk(TPACPI_ERR
2253 "failed to allocate memory for key map\n");
2254 res = -ENOMEM;
2255 goto err_exit;
2256 }
2257
2258 if (thinkpad_id.vendor == PCI_VENDOR_ID_LENOVO) {
2259 dbg_printk(TPACPI_DBG_INIT,
2260 "using Lenovo default hot key map\n");
2261 memcpy(hotkey_keycode_map, &lenovo_keycode_map,
2262 TPACPI_HOTKEY_MAP_SIZE);
2263 } else {
2264 dbg_printk(TPACPI_DBG_INIT,
2265 "using IBM default hot key map\n");
2266 memcpy(hotkey_keycode_map, &ibm_keycode_map,
2267 TPACPI_HOTKEY_MAP_SIZE);
2268 }
2269
2270 set_bit(EV_KEY, tpacpi_inputdev->evbit);
2271 set_bit(EV_MSC, tpacpi_inputdev->evbit);
2272 set_bit(MSC_SCAN, tpacpi_inputdev->mscbit);
2273 tpacpi_inputdev->keycodesize = TPACPI_HOTKEY_MAP_TYPESIZE;
2274 tpacpi_inputdev->keycodemax = TPACPI_HOTKEY_MAP_LEN;
2275 tpacpi_inputdev->keycode = hotkey_keycode_map;
2276 for (i = 0; i < TPACPI_HOTKEY_MAP_LEN; i++) {
2277 if (hotkey_keycode_map[i] != KEY_RESERVED) {
2278 set_bit(hotkey_keycode_map[i],
2279 tpacpi_inputdev->keybit);
2280 } else {
2281 if (i < sizeof(hotkey_reserved_mask)*8)
2282 hotkey_reserved_mask |= 1 << i;
2283 }
2284 }
2285
2286 if (tp_features.hotkey_wlsw) {
2287 set_bit(EV_SW, tpacpi_inputdev->evbit);
2288 set_bit(SW_RFKILL_ALL, tpacpi_inputdev->swbit);
2289 }
2290 if (tp_features.hotkey_tablet) {
2291 set_bit(EV_SW, tpacpi_inputdev->evbit);
2292 set_bit(SW_TABLET_MODE, tpacpi_inputdev->swbit);
2293 }
2294
2295 /* Do not issue duplicate brightness change events to
2296 * userspace */
2297 if (!tp_features.bright_acpimode)
2298 /* update bright_acpimode... */
2299 tpacpi_check_std_acpi_brightness_support();
2300
2301 if (tp_features.bright_acpimode) {
2302 printk(TPACPI_INFO
2303 "This ThinkPad has standard ACPI backlight "
2304 "brightness control, supported by the ACPI "
2305 "video driver\n");
2306 printk(TPACPI_NOTICE
2307 "Disabling thinkpad-acpi brightness events "
2308 "by default...\n");
2309
2310 /* The hotkey_reserved_mask change below is not
2311 * necessary while the keys are at KEY_RESERVED in the
2312 * default map, but better safe than sorry, leave it
2313 * here as a marker of what we have to do, especially
2314 * when we finally become able to set this at runtime
2315 * on response to X.org requests */
2316 hotkey_reserved_mask |=
2317 (1 << TP_ACPI_HOTKEYSCAN_FNHOME)
2318 | (1 << TP_ACPI_HOTKEYSCAN_FNEND);
2319 }
2320
2321 dbg_printk(TPACPI_DBG_INIT, "enabling hot key handling\n");
2322 res = hotkey_status_set(1);
2323 if (res) {
2324 hotkey_exit();
2325 return res;
2326 }
2327 res = hotkey_mask_set(((hotkey_all_mask | hotkey_source_mask)
2328 & ~hotkey_reserved_mask)
2329 | hotkey_orig_mask);
2330 if (res < 0 && res != -ENXIO) {
2331 hotkey_exit();
2332 return res;
2333 }
2334
2335 dbg_printk(TPACPI_DBG_INIT,
2336 "legacy hot key reporting over procfs %s\n",
2337 (hotkey_report_mode < 2) ?
2338 "enabled" : "disabled");
2339
2340 tpacpi_inputdev->open = &hotkey_inputdev_open;
2341 tpacpi_inputdev->close = &hotkey_inputdev_close;
2342
2343 hotkey_poll_setup_safe(1);
2344 tpacpi_send_radiosw_update();
2345 tpacpi_input_send_tabletsw();
2346
2347 return 0;
2348
2349 err_exit:
2350 delete_attr_set(hotkey_dev_attributes, &tpacpi_pdev->dev.kobj);
2351 hotkey_dev_attributes = NULL;
2352
2353 return (res < 0)? res : 1;
2354 }
2355
2356 static void hotkey_notify(struct ibm_struct *ibm, u32 event)
2357 {
2358 u32 hkey;
2359 unsigned int scancode;
2360 int send_acpi_ev;
2361 int ignore_acpi_ev;
2362 int unk_ev;
2363
2364 if (event != 0x80) {
2365 printk(TPACPI_ERR
2366 "unknown HKEY notification event %d\n", event);
2367 /* forward it to userspace, maybe it knows how to handle it */
2368 acpi_bus_generate_netlink_event(
2369 ibm->acpi->device->pnp.device_class,
2370 ibm->acpi->device->dev.bus_id,
2371 event, 0);
2372 return;
2373 }
2374
2375 while (1) {
2376 if (!acpi_evalf(hkey_handle, &hkey, "MHKP", "d")) {
2377 printk(TPACPI_ERR "failed to retrieve HKEY event\n");
2378 return;
2379 }
2380
2381 if (hkey == 0) {
2382 /* queue empty */
2383 return;
2384 }
2385
2386 send_acpi_ev = 1;
2387 ignore_acpi_ev = 0;
2388 unk_ev = 0;
2389
2390 switch (hkey >> 12) {
2391 case 1:
2392 /* 0x1000-0x1FFF: key presses */
2393 scancode = hkey & 0xfff;
2394 if (scancode > 0 && scancode < 0x21) {
2395 scancode--;
2396 if (!(hotkey_source_mask & (1 << scancode))) {
2397 tpacpi_input_send_key(scancode);
2398 send_acpi_ev = 0;
2399 } else {
2400 ignore_acpi_ev = 1;
2401 }
2402 } else {
2403 unk_ev = 1;
2404 }
2405 break;
2406 case 2:
2407 /* Wakeup reason */
2408 switch (hkey) {
2409 case 0x2304: /* suspend, undock */
2410 case 0x2404: /* hibernation, undock */
2411 hotkey_wakeup_reason = TP_ACPI_WAKEUP_UNDOCK;
2412 ignore_acpi_ev = 1;
2413 break;
2414 case 0x2305: /* suspend, bay eject */
2415 case 0x2405: /* hibernation, bay eject */
2416 hotkey_wakeup_reason = TP_ACPI_WAKEUP_BAYEJ;
2417 ignore_acpi_ev = 1;
2418 break;
2419 default:
2420 unk_ev = 1;
2421 }
2422 if (hotkey_wakeup_reason != TP_ACPI_WAKEUP_NONE) {
2423 printk(TPACPI_INFO
2424 "woke up due to a hot-unplug "
2425 "request...\n");
2426 hotkey_wakeup_reason_notify_change();
2427 }
2428 break;
2429 case 3:
2430 /* bay-related wakeups */
2431 if (hkey == 0x3003) {
2432 hotkey_autosleep_ack = 1;
2433 printk(TPACPI_INFO
2434 "bay ejected\n");
2435 hotkey_wakeup_hotunplug_complete_notify_change();
2436 } else {
2437 unk_ev = 1;
2438 }
2439 break;
2440 case 4:
2441 /* dock-related wakeups */
2442 if (hkey == 0x4003) {
2443 hotkey_autosleep_ack = 1;
2444 printk(TPACPI_INFO
2445 "undocked\n");
2446 hotkey_wakeup_hotunplug_complete_notify_change();
2447 } else {
2448 unk_ev = 1;
2449 }
2450 break;
2451 case 5:
2452 /* 0x5000-0x5FFF: human interface helpers */
2453 switch (hkey) {
2454 case 0x5010: /* Lenovo new BIOS: brightness changed */
2455 case 0x500b: /* X61t: tablet pen inserted into bay */
2456 case 0x500c: /* X61t: tablet pen removed from bay */
2457 break;
2458 case 0x5009: /* X41t-X61t: swivel up (tablet mode) */
2459 case 0x500a: /* X41t-X61t: swivel down (normal mode) */
2460 tpacpi_input_send_tabletsw();
2461 hotkey_tablet_mode_notify_change();
2462 send_acpi_ev = 0;
2463 break;
2464 case 0x5001:
2465 case 0x5002:
2466 /* LID switch events. Do not propagate */
2467 ignore_acpi_ev = 1;
2468 break;
2469 default:
2470 unk_ev = 1;
2471 }
2472 break;
2473 case 7:
2474 /* 0x7000-0x7FFF: misc */
2475 if (tp_features.hotkey_wlsw && hkey == 0x7000) {
2476 tpacpi_send_radiosw_update();
2477 send_acpi_ev = 0;
2478 break;
2479 }
2480 /* fallthrough to default */
2481 default:
2482 unk_ev = 1;
2483 }
2484 if (unk_ev) {
2485 printk(TPACPI_NOTICE
2486 "unhandled HKEY event 0x%04x\n", hkey);
2487 }
2488
2489 /* Legacy events */
2490 if (!ignore_acpi_ev &&
2491 (send_acpi_ev || hotkey_report_mode < 2)) {
2492 acpi_bus_generate_proc_event(ibm->acpi->device,
2493 event, hkey);
2494 }
2495
2496 /* netlink events */
2497 if (!ignore_acpi_ev && send_acpi_ev) {
2498 acpi_bus_generate_netlink_event(
2499 ibm->acpi->device->pnp.device_class,
2500 ibm->acpi->device->dev.bus_id,
2501 event, hkey);
2502 }
2503 }
2504 }
2505
2506 static void hotkey_suspend(pm_message_t state)
2507 {
2508 /* Do these on suspend, we get the events on early resume! */
2509 hotkey_wakeup_reason = TP_ACPI_WAKEUP_NONE;
2510 hotkey_autosleep_ack = 0;
2511 }
2512
2513 static void hotkey_resume(void)
2514 {
2515 if (hotkey_mask_get())
2516 printk(TPACPI_ERR
2517 "error while trying to read hot key mask "
2518 "from firmware\n");
2519 tpacpi_send_radiosw_update();
2520 hotkey_tablet_mode_notify_change();
2521 hotkey_wakeup_reason_notify_change();
2522 hotkey_wakeup_hotunplug_complete_notify_change();
2523 hotkey_poll_setup_safe(0);
2524 }
2525
2526 /* procfs -------------------------------------------------------------- */
2527 static int hotkey_read(char *p)
2528 {
2529 int res, status;
2530 int len = 0;
2531
2532 if (!tp_features.hotkey) {
2533 len += sprintf(p + len, "status:\t\tnot supported\n");
2534 return len;
2535 }
2536
2537 if (mutex_lock_interruptible(&hotkey_mutex))
2538 return -ERESTARTSYS;
2539 res = hotkey_status_get(&status);
2540 if (!res)
2541 res = hotkey_mask_get();
2542 mutex_unlock(&hotkey_mutex);
2543 if (res)
2544 return res;
2545
2546 len += sprintf(p + len, "status:\t\t%s\n", enabled(status, 0));
2547 if (tp_features.hotkey_mask) {
2548 len += sprintf(p + len, "mask:\t\t0x%08x\n", hotkey_mask);
2549 len += sprintf(p + len,
2550 "commands:\tenable, disable, reset, <mask>\n");
2551 } else {
2552 len += sprintf(p + len, "mask:\t\tnot supported\n");
2553 len += sprintf(p + len, "commands:\tenable, disable, reset\n");
2554 }
2555
2556 return len;
2557 }
2558
2559 static int hotkey_write(char *buf)
2560 {
2561 int res, status;
2562 u32 mask;
2563 char *cmd;
2564
2565 if (!tp_features.hotkey)
2566 return -ENODEV;
2567
2568 if (mutex_lock_interruptible(&hotkey_mutex))
2569 return -ERESTARTSYS;
2570
2571 status = -1;
2572 mask = hotkey_mask;
2573
2574 res = 0;
2575 while ((cmd = next_cmd(&buf))) {
2576 if (strlencmp(cmd, "enable") == 0) {
2577 status = 1;
2578 } else if (strlencmp(cmd, "disable") == 0) {
2579 status = 0;
2580 } else if (strlencmp(cmd, "reset") == 0) {
2581 status = hotkey_orig_status;
2582 mask = hotkey_orig_mask;
2583 } else if (sscanf(cmd, "0x%x", &mask) == 1) {
2584 /* mask set */
2585 } else if (sscanf(cmd, "%x", &mask) == 1) {
2586 /* mask set */
2587 } else {
2588 res = -EINVAL;
2589 goto errexit;
2590 }
2591 }
2592 if (status != -1)
2593 res = hotkey_status_set(status);
2594
2595 if (!res && mask != hotkey_mask)
2596 res = hotkey_mask_set(mask);
2597
2598 errexit:
2599 mutex_unlock(&hotkey_mutex);
2600 return res;
2601 }
2602
2603 static const struct acpi_device_id ibm_htk_device_ids[] = {
2604 {TPACPI_ACPI_HKEY_HID, 0},
2605 {"", 0},
2606 };
2607
2608 static struct tp_acpi_drv_struct ibm_hotkey_acpidriver = {
2609 .hid = ibm_htk_device_ids,
2610 .notify = hotkey_notify,
2611 .handle = &hkey_handle,
2612 .type = ACPI_DEVICE_NOTIFY,
2613 };
2614
2615 static struct ibm_struct hotkey_driver_data = {
2616 .name = "hotkey",
2617 .read = hotkey_read,
2618 .write = hotkey_write,
2619 .exit = hotkey_exit,
2620 .resume = hotkey_resume,
2621 .suspend = hotkey_suspend,
2622 .acpi = &ibm_hotkey_acpidriver,
2623 };
2624
2625 /*************************************************************************
2626 * Bluetooth subdriver
2627 */
2628
2629 enum {
2630 /* ACPI GBDC/SBDC bits */
2631 TP_ACPI_BLUETOOTH_HWPRESENT = 0x01, /* Bluetooth hw available */
2632 TP_ACPI_BLUETOOTH_RADIOSSW = 0x02, /* Bluetooth radio enabled */
2633 TP_ACPI_BLUETOOTH_UNK = 0x04, /* unknown function */
2634 };
2635
2636 static struct rfkill *tpacpi_bluetooth_rfkill;
2637
2638 static int bluetooth_get_radiosw(void)
2639 {
2640 int status;
2641
2642 if (!tp_features.bluetooth)
2643 return -ENODEV;
2644
2645 /* WLSW overrides bluetooth in firmware/hardware, reflect that */
2646 if (tp_features.hotkey_wlsw && !hotkey_get_wlsw(&status) && !status)
2647 return RFKILL_STATE_HARD_BLOCKED;
2648
2649 if (!acpi_evalf(hkey_handle, &status, "GBDC", "d"))
2650 return -EIO;
2651
2652 return ((status & TP_ACPI_BLUETOOTH_RADIOSSW) != 0) ?
2653 RFKILL_STATE_UNBLOCKED : RFKILL_STATE_SOFT_BLOCKED;
2654 }
2655
2656 static void bluetooth_update_rfk(void)
2657 {
2658 int status;
2659
2660 if (!tpacpi_bluetooth_rfkill)
2661 return;
2662
2663 status = bluetooth_get_radiosw();
2664 if (status < 0)
2665 return;
2666 rfkill_force_state(tpacpi_bluetooth_rfkill, status);
2667 }
2668
2669 static int bluetooth_set_radiosw(int radio_on, int update_rfk)
2670 {
2671 int status;
2672
2673 if (!tp_features.bluetooth)
2674 return -ENODEV;
2675
2676 /* WLSW overrides bluetooth in firmware/hardware, but there is no
2677 * reason to risk weird behaviour. */
2678 if (tp_features.hotkey_wlsw && !hotkey_get_wlsw(&status) && !status
2679 && radio_on)
2680 return -EPERM;
2681
2682 if (!acpi_evalf(hkey_handle, &status, "GBDC", "d"))
2683 return -EIO;
2684 if (radio_on)
2685 status |= TP_ACPI_BLUETOOTH_RADIOSSW;
2686 else
2687 status &= ~TP_ACPI_BLUETOOTH_RADIOSSW;
2688 if (!acpi_evalf(hkey_handle, NULL, "SBDC", "vd", status))
2689 return -EIO;
2690
2691 if (update_rfk)
2692 bluetooth_update_rfk();
2693
2694 return 0;
2695 }
2696
2697 /* sysfs bluetooth enable ---------------------------------------------- */
2698 static ssize_t bluetooth_enable_show(struct device *dev,
2699 struct device_attribute *attr,
2700 char *buf)
2701 {
2702 int status;
2703
2704 status = bluetooth_get_radiosw();
2705 if (status < 0)
2706 return status;
2707
2708 return snprintf(buf, PAGE_SIZE, "%d\n",
2709 (status == RFKILL_STATE_UNBLOCKED) ? 1 : 0);
2710 }
2711
2712 static ssize_t bluetooth_enable_store(struct device *dev,
2713 struct device_attribute *attr,
2714 const char *buf, size_t count)
2715 {
2716 unsigned long t;
2717 int res;
2718
2719 if (parse_strtoul(buf, 1, &t))
2720 return -EINVAL;
2721
2722 res = bluetooth_set_radiosw(t, 1);
2723
2724 return (res) ? res : count;
2725 }
2726
2727 static struct device_attribute dev_attr_bluetooth_enable =
2728 __ATTR(bluetooth_enable, S_IWUSR | S_IRUGO,
2729 bluetooth_enable_show, bluetooth_enable_store);
2730
2731 /* --------------------------------------------------------------------- */
2732
2733 static struct attribute *bluetooth_attributes[] = {
2734 &dev_attr_bluetooth_enable.attr,
2735 NULL
2736 };
2737
2738 static const struct attribute_group bluetooth_attr_group = {
2739 .attrs = bluetooth_attributes,
2740 };
2741
2742 static int tpacpi_bluetooth_rfk_get(void *data, enum rfkill_state *state)
2743 {
2744 int bts = bluetooth_get_radiosw();
2745
2746 if (bts < 0)
2747 return bts;
2748
2749 *state = bts;
2750 return 0;
2751 }
2752
2753 static int tpacpi_bluetooth_rfk_set(void *data, enum rfkill_state state)
2754 {
2755 return bluetooth_set_radiosw((state == RFKILL_STATE_UNBLOCKED), 0);
2756 }
2757
2758 static void bluetooth_exit(void)
2759 {
2760 if (tpacpi_bluetooth_rfkill)
2761 rfkill_unregister(tpacpi_bluetooth_rfkill);
2762
2763 sysfs_remove_group(&tpacpi_pdev->dev.kobj,
2764 &bluetooth_attr_group);
2765 }
2766
2767 static int __init bluetooth_init(struct ibm_init_struct *iibm)
2768 {
2769 int res;
2770 int status = 0;
2771
2772 vdbg_printk(TPACPI_DBG_INIT, "initializing bluetooth subdriver\n");
2773
2774 TPACPI_ACPIHANDLE_INIT(hkey);
2775
2776 /* bluetooth not supported on 570, 600e/x, 770e, 770x, A21e, A2xm/p,
2777 G4x, R30, R31, R40e, R50e, T20-22, X20-21 */
2778 tp_features.bluetooth = hkey_handle &&
2779 acpi_evalf(hkey_handle, &status, "GBDC", "qd");
2780
2781 vdbg_printk(TPACPI_DBG_INIT, "bluetooth is %s, status 0x%02x\n",
2782 str_supported(tp_features.bluetooth),
2783 status);
2784
2785 if (tp_features.bluetooth &&
2786 !(status & TP_ACPI_BLUETOOTH_HWPRESENT)) {
2787 /* no bluetooth hardware present in system */
2788 tp_features.bluetooth = 0;
2789 dbg_printk(TPACPI_DBG_INIT,
2790 "bluetooth hardware not installed\n");
2791 }
2792
2793 if (!tp_features.bluetooth)
2794 return 1;
2795
2796 res = sysfs_create_group(&tpacpi_pdev->dev.kobj,
2797 &bluetooth_attr_group);
2798 if (res)
2799 return res;
2800
2801 res = tpacpi_new_rfkill(TPACPI_RFK_BLUETOOTH_SW_ID,
2802 &tpacpi_bluetooth_rfkill,
2803 RFKILL_TYPE_BLUETOOTH,
2804 "tpacpi_bluetooth_sw",
2805 tpacpi_bluetooth_rfk_set,
2806 tpacpi_bluetooth_rfk_get);
2807 if (res) {
2808 bluetooth_exit();
2809 return res;
2810 }
2811
2812 return 0;
2813 }
2814
2815 /* procfs -------------------------------------------------------------- */
2816 static int bluetooth_read(char *p)
2817 {
2818 int len = 0;
2819 int status = bluetooth_get_radiosw();
2820
2821 if (!tp_features.bluetooth)
2822 len += sprintf(p + len, "status:\t\tnot supported\n");
2823 else {
2824 len += sprintf(p + len, "status:\t\t%s\n",
2825 (status == RFKILL_STATE_UNBLOCKED) ?
2826 "enabled" : "disabled");
2827 len += sprintf(p + len, "commands:\tenable, disable\n");
2828 }
2829
2830 return len;
2831 }
2832
2833 static int bluetooth_write(char *buf)
2834 {
2835 char *cmd;
2836
2837 if (!tp_features.bluetooth)
2838 return -ENODEV;
2839
2840 while ((cmd = next_cmd(&buf))) {
2841 if (strlencmp(cmd, "enable") == 0) {
2842 bluetooth_set_radiosw(1, 1);
2843 } else if (strlencmp(cmd, "disable") == 0) {
2844 bluetooth_set_radiosw(0, 1);
2845 } else
2846 return -EINVAL;
2847 }
2848
2849 return 0;
2850 }
2851
2852 static struct ibm_struct bluetooth_driver_data = {
2853 .name = "bluetooth",
2854 .read = bluetooth_read,
2855 .write = bluetooth_write,
2856 .exit = bluetooth_exit,
2857 };
2858
2859 /*************************************************************************
2860 * Wan subdriver
2861 */
2862
2863 enum {
2864 /* ACPI GWAN/SWAN bits */
2865 TP_ACPI_WANCARD_HWPRESENT = 0x01, /* Wan hw available */
2866 TP_ACPI_WANCARD_RADIOSSW = 0x02, /* Wan radio enabled */
2867 TP_ACPI_WANCARD_UNK = 0x04, /* unknown function */
2868 };
2869
2870 static struct rfkill *tpacpi_wan_rfkill;
2871
2872 static int wan_get_radiosw(void)
2873 {
2874 int status;
2875
2876 if (!tp_features.wan)
2877 return -ENODEV;
2878
2879 /* WLSW overrides WWAN in firmware/hardware, reflect that */
2880 if (tp_features.hotkey_wlsw && !hotkey_get_wlsw(&status) && !status)
2881 return RFKILL_STATE_HARD_BLOCKED;
2882
2883 if (!acpi_evalf(hkey_handle, &status, "GWAN", "d"))
2884 return -EIO;
2885
2886 return ((status & TP_ACPI_WANCARD_RADIOSSW) != 0) ?
2887 RFKILL_STATE_UNBLOCKED : RFKILL_STATE_SOFT_BLOCKED;
2888 }
2889
2890 static void wan_update_rfk(void)
2891 {
2892 int status;
2893
2894 if (!tpacpi_wan_rfkill)
2895 return;
2896
2897 status = wan_get_radiosw();
2898 if (status < 0)
2899 return;
2900 rfkill_force_state(tpacpi_wan_rfkill, status);
2901 }
2902
2903 static int wan_set_radiosw(int radio_on, int update_rfk)
2904 {
2905 int status;
2906
2907 if (!tp_features.wan)
2908 return -ENODEV;
2909
2910 /* WLSW overrides bluetooth in firmware/hardware, but there is no
2911 * reason to risk weird behaviour. */
2912 if (tp_features.hotkey_wlsw && !hotkey_get_wlsw(&status) && !status
2913 && radio_on)
2914 return -EPERM;
2915
2916 if (!acpi_evalf(hkey_handle, &status, "GWAN", "d"))
2917 return -EIO;
2918 if (radio_on)
2919 status |= TP_ACPI_WANCARD_RADIOSSW;
2920 else
2921 status &= ~TP_ACPI_WANCARD_RADIOSSW;
2922 if (!acpi_evalf(hkey_handle, NULL, "SWAN", "vd", status))
2923 return -EIO;
2924
2925 if (update_rfk)
2926 wan_update_rfk();
2927
2928 return 0;
2929 }
2930
2931 /* sysfs wan enable ---------------------------------------------------- */
2932 static ssize_t wan_enable_show(struct device *dev,
2933 struct device_attribute *attr,
2934 char *buf)
2935 {
2936 int status;
2937
2938 status = wan_get_radiosw();
2939 if (status < 0)
2940 return status;
2941
2942 return snprintf(buf, PAGE_SIZE, "%d\n",
2943 (status == RFKILL_STATE_UNBLOCKED) ? 1 : 0);
2944 }
2945
2946 static ssize_t wan_enable_store(struct device *dev,
2947 struct device_attribute *attr,
2948 const char *buf, size_t count)
2949 {
2950 unsigned long t;
2951 int res;
2952
2953 if (parse_strtoul(buf, 1, &t))
2954 return -EINVAL;
2955
2956 res = wan_set_radiosw(t, 1);
2957
2958 return (res) ? res : count;
2959 }
2960
2961 static struct device_attribute dev_attr_wan_enable =
2962 __ATTR(wwan_enable, S_IWUSR | S_IRUGO,
2963 wan_enable_show, wan_enable_store);
2964
2965 /* --------------------------------------------------------------------- */
2966
2967 static struct attribute *wan_attributes[] = {
2968 &dev_attr_wan_enable.attr,
2969 NULL
2970 };
2971
2972 static const struct attribute_group wan_attr_group = {
2973 .attrs = wan_attributes,
2974 };
2975
2976 static int tpacpi_wan_rfk_get(void *data, enum rfkill_state *state)
2977 {
2978 int wans = wan_get_radiosw();
2979
2980 if (wans < 0)
2981 return wans;
2982
2983 *state = wans;
2984 return 0;
2985 }
2986
2987 static int tpacpi_wan_rfk_set(void *data, enum rfkill_state state)
2988 {
2989 return wan_set_radiosw((state == RFKILL_STATE_UNBLOCKED), 0);
2990 }
2991
2992 static void wan_exit(void)
2993 {
2994 if (tpacpi_wan_rfkill)
2995 rfkill_unregister(tpacpi_wan_rfkill);
2996
2997 sysfs_remove_group(&tpacpi_pdev->dev.kobj,
2998 &wan_attr_group);
2999 }
3000
3001 static int __init wan_init(struct ibm_init_struct *iibm)
3002 {
3003 int res;
3004 int status = 0;
3005
3006 vdbg_printk(TPACPI_DBG_INIT, "initializing wan subdriver\n");
3007
3008 TPACPI_ACPIHANDLE_INIT(hkey);
3009
3010 tp_features.wan = hkey_handle &&
3011 acpi_evalf(hkey_handle, &status, "GWAN", "qd");
3012
3013 vdbg_printk(TPACPI_DBG_INIT, "wan is %s, status 0x%02x\n",
3014 str_supported(tp_features.wan),
3015 status);
3016
3017 if (tp_features.wan &&
3018 !(status & TP_ACPI_WANCARD_HWPRESENT)) {
3019 /* no wan hardware present in system */
3020 tp_features.wan = 0;
3021 dbg_printk(TPACPI_DBG_INIT,
3022 "wan hardware not installed\n");
3023 }
3024
3025 if (!tp_features.wan)
3026 return 1;
3027
3028 res = sysfs_create_group(&tpacpi_pdev->dev.kobj,
3029 &wan_attr_group);
3030 if (res)
3031 return res;
3032
3033 res = tpacpi_new_rfkill(TPACPI_RFK_WWAN_SW_ID,
3034 &tpacpi_wan_rfkill,
3035 RFKILL_TYPE_WWAN,
3036 "tpacpi_wwan_sw",
3037 tpacpi_wan_rfk_set,
3038 tpacpi_wan_rfk_get);
3039 if (res) {
3040 wan_exit();
3041 return res;
3042 }
3043
3044 return 0;
3045 }
3046
3047 /* procfs -------------------------------------------------------------- */
3048 static int wan_read(char *p)
3049 {
3050 int len = 0;
3051 int status = wan_get_radiosw();
3052
3053 if (!tp_features.wan)
3054 len += sprintf(p + len, "status:\t\tnot supported\n");
3055 else {
3056 len += sprintf(p + len, "status:\t\t%s\n",
3057 (status == RFKILL_STATE_UNBLOCKED) ?
3058 "enabled" : "disabled");
3059 len += sprintf(p + len, "commands:\tenable, disable\n");
3060 }
3061
3062 return len;
3063 }
3064
3065 static int wan_write(char *buf)
3066 {
3067 char *cmd;
3068
3069 if (!tp_features.wan)
3070 return -ENODEV;
3071
3072 while ((cmd = next_cmd(&buf))) {
3073 if (strlencmp(cmd, "enable") == 0) {
3074 wan_set_radiosw(1, 1);
3075 } else if (strlencmp(cmd, "disable") == 0) {
3076 wan_set_radiosw(0, 1);
3077 } else
3078 return -EINVAL;
3079 }
3080
3081 return 0;
3082 }
3083
3084 static struct ibm_struct wan_driver_data = {
3085 .name = "wan",
3086 .read = wan_read,
3087 .write = wan_write,
3088 .exit = wan_exit,
3089 .flags.experimental = 1,
3090 };
3091
3092 /*************************************************************************
3093 * Video subdriver
3094 */
3095
3096 #ifdef CONFIG_THINKPAD_ACPI_VIDEO
3097
3098 enum video_access_mode {
3099 TPACPI_VIDEO_NONE = 0,
3100 TPACPI_VIDEO_570, /* 570 */
3101 TPACPI_VIDEO_770, /* 600e/x, 770e, 770x */
3102 TPACPI_VIDEO_NEW, /* all others */
3103 };
3104
3105 enum { /* video status flags, based on VIDEO_570 */
3106 TP_ACPI_VIDEO_S_LCD = 0x01, /* LCD output enabled */
3107 TP_ACPI_VIDEO_S_CRT = 0x02, /* CRT output enabled */
3108 TP_ACPI_VIDEO_S_DVI = 0x08, /* DVI output enabled */
3109 };
3110
3111 enum { /* TPACPI_VIDEO_570 constants */
3112 TP_ACPI_VIDEO_570_PHSCMD = 0x87, /* unknown magic constant :( */
3113 TP_ACPI_VIDEO_570_PHSMASK = 0x03, /* PHS bits that map to
3114 * video_status_flags */
3115 TP_ACPI_VIDEO_570_PHS2CMD = 0x8b, /* unknown magic constant :( */
3116 TP_ACPI_VIDEO_570_PHS2SET = 0x80, /* unknown magic constant :( */
3117 };
3118
3119 static enum video_access_mode video_supported;
3120 static int video_orig_autosw;
3121
3122 static int video_autosw_get(void);
3123 static int video_autosw_set(int enable);
3124
3125 TPACPI_HANDLE(vid2, root, "\\_SB.PCI0.AGPB.VID"); /* G41 */
3126
3127 static int __init video_init(struct ibm_init_struct *iibm)
3128 {
3129 int ivga;
3130
3131 vdbg_printk(TPACPI_DBG_INIT, "initializing video subdriver\n");
3132
3133 TPACPI_ACPIHANDLE_INIT(vid);
3134 TPACPI_ACPIHANDLE_INIT(vid2);
3135
3136 if (vid2_handle && acpi_evalf(NULL, &ivga, "\\IVGA", "d") && ivga)
3137 /* G41, assume IVGA doesn't change */
3138 vid_handle = vid2_handle;
3139
3140 if (!vid_handle)
3141 /* video switching not supported on R30, R31 */
3142 video_supported = TPACPI_VIDEO_NONE;
3143 else if (acpi_evalf(vid_handle, &video_orig_autosw, "SWIT", "qd"))
3144 /* 570 */
3145 video_supported = TPACPI_VIDEO_570;
3146 else if (acpi_evalf(vid_handle, &video_orig_autosw, "^VADL", "qd"))
3147 /* 600e/x, 770e, 770x */
3148 video_supported = TPACPI_VIDEO_770;
3149 else
3150 /* all others */
3151 video_supported = TPACPI_VIDEO_NEW;
3152
3153 vdbg_printk(TPACPI_DBG_INIT, "video is %s, mode %d\n",
3154 str_supported(video_supported != TPACPI_VIDEO_NONE),
3155 video_supported);
3156
3157 return (video_supported != TPACPI_VIDEO_NONE)? 0 : 1;
3158 }
3159
3160 static void video_exit(void)
3161 {
3162 dbg_printk(TPACPI_DBG_EXIT,
3163 "restoring original video autoswitch mode\n");
3164 if (video_autosw_set(video_orig_autosw))
3165 printk(TPACPI_ERR "error while trying to restore original "
3166 "video autoswitch mode\n");
3167 }
3168
3169 static int video_outputsw_get(void)
3170 {
3171 int status = 0;
3172 int i;
3173
3174 switch (video_supported) {
3175 case TPACPI_VIDEO_570:
3176 if (!acpi_evalf(NULL, &i, "\\_SB.PHS", "dd",
3177 TP_ACPI_VIDEO_570_PHSCMD))
3178 return -EIO;
3179 status = i & TP_ACPI_VIDEO_570_PHSMASK;
3180 break;
3181 case TPACPI_VIDEO_770:
3182 if (!acpi_evalf(NULL, &i, "\\VCDL", "d"))
3183 return -EIO;
3184 if (i)
3185 status |= TP_ACPI_VIDEO_S_LCD;
3186 if (!acpi_evalf(NULL, &i, "\\VCDC", "d"))
3187 return -EIO;
3188 if (i)
3189 status |= TP_ACPI_VIDEO_S_CRT;
3190 break;
3191 case TPACPI_VIDEO_NEW:
3192 if (!acpi_evalf(NULL, NULL, "\\VUPS", "vd", 1) ||
3193 !acpi_evalf(NULL, &i, "\\VCDC", "d"))
3194 return -EIO;
3195 if (i)
3196 status |= TP_ACPI_VIDEO_S_CRT;
3197
3198 if (!acpi_evalf(NULL, NULL, "\\VUPS", "vd", 0) ||
3199 !acpi_evalf(NULL, &i, "\\VCDL", "d"))
3200 return -EIO;
3201 if (i)
3202 status |= TP_ACPI_VIDEO_S_LCD;
3203 if (!acpi_evalf(NULL, &i, "\\VCDD", "d"))
3204 return -EIO;
3205 if (i)
3206 status |= TP_ACPI_VIDEO_S_DVI;
3207 break;
3208 default:
3209 return -ENOSYS;
3210 }
3211
3212 return status;
3213 }
3214
3215 static int video_outputsw_set(int status)
3216 {
3217 int autosw;
3218 int res = 0;
3219
3220 switch (video_supported) {
3221 case TPACPI_VIDEO_570:
3222 res = acpi_evalf(NULL, NULL,
3223 "\\_SB.PHS2", "vdd",
3224 TP_ACPI_VIDEO_570_PHS2CMD,
3225 status | TP_ACPI_VIDEO_570_PHS2SET);
3226 break;
3227 case TPACPI_VIDEO_770:
3228 autosw = video_autosw_get();
3229 if (autosw < 0)
3230 return autosw;
3231
3232 res = video_autosw_set(1);
3233 if (res)
3234 return res;
3235 res = acpi_evalf(vid_handle, NULL,
3236 "ASWT", "vdd", status * 0x100, 0);
3237 if (!autosw && video_autosw_set(autosw)) {
3238 printk(TPACPI_ERR
3239 "video auto-switch left enabled due to error\n");
3240 return -EIO;
3241 }
3242 break;
3243 case TPACPI_VIDEO_NEW:
3244 res = acpi_evalf(NULL, NULL, "\\VUPS", "vd", 0x80) &&
3245 acpi_evalf(NULL, NULL, "\\VSDS", "vdd", status, 1);
3246 break;
3247 default:
3248 return -ENOSYS;
3249 }
3250
3251 return (res)? 0 : -EIO;
3252 }
3253
3254 static int video_autosw_get(void)
3255 {
3256 int autosw = 0;
3257
3258 switch (video_supported) {
3259 case TPACPI_VIDEO_570:
3260 if (!acpi_evalf(vid_handle, &autosw, "SWIT", "d"))
3261 return -EIO;
3262 break;
3263 case TPACPI_VIDEO_770:
3264 case TPACPI_VIDEO_NEW:
3265 if (!acpi_evalf(vid_handle, &autosw, "^VDEE", "d"))
3266 return -EIO;
3267 break;
3268 default:
3269 return -ENOSYS;
3270 }
3271
3272 return autosw & 1;
3273 }
3274
3275 static int video_autosw_set(int enable)
3276 {
3277 if (!acpi_evalf(vid_handle, NULL, "_DOS", "vd", (enable)? 1 : 0))
3278 return -EIO;
3279 return 0;
3280 }
3281
3282 static int video_outputsw_cycle(void)
3283 {
3284 int autosw = video_autosw_get();
3285 int res;
3286
3287 if (autosw < 0)
3288 return autosw;
3289
3290 switch (video_supported) {
3291 case TPACPI_VIDEO_570:
3292 res = video_autosw_set(1);
3293 if (res)
3294 return res;
3295 res = acpi_evalf(ec_handle, NULL, "_Q16", "v");
3296 break;
3297 case TPACPI_VIDEO_770:
3298 case TPACPI_VIDEO_NEW:
3299 res = video_autosw_set(1);
3300 if (res)
3301 return res;
3302 res = acpi_evalf(vid_handle, NULL, "VSWT", "v");
3303 break;
3304 default:
3305 return -ENOSYS;
3306 }
3307 if (!autosw && video_autosw_set(autosw)) {
3308 printk(TPACPI_ERR
3309 "video auto-switch left enabled due to error\n");
3310 return -EIO;
3311 }
3312
3313 return (res)? 0 : -EIO;
3314 }
3315
3316 static int video_expand_toggle(void)
3317 {
3318 switch (video_supported) {
3319 case TPACPI_VIDEO_570:
3320 return acpi_evalf(ec_handle, NULL, "_Q17", "v")?
3321 0 : -EIO;
3322 case TPACPI_VIDEO_770:
3323 return acpi_evalf(vid_handle, NULL, "VEXP", "v")?
3324 0 : -EIO;
3325 case TPACPI_VIDEO_NEW:
3326 return acpi_evalf(NULL, NULL, "\\VEXP", "v")?
3327 0 : -EIO;
3328 default:
3329 return -ENOSYS;
3330 }
3331 /* not reached */
3332 }
3333
3334 static int video_read(char *p)
3335 {
3336 int status, autosw;
3337 int len = 0;
3338
3339 if (video_supported == TPACPI_VIDEO_NONE) {
3340 len += sprintf(p + len, "status:\t\tnot supported\n");
3341 return len;
3342 }
3343
3344 status = video_outputsw_get();
3345 if (status < 0)
3346 return status;
3347
3348 autosw = video_autosw_get();
3349 if (autosw < 0)
3350 return autosw;
3351
3352 len += sprintf(p + len, "status:\t\tsupported\n");
3353 len += sprintf(p + len, "lcd:\t\t%s\n", enabled(status, 0));
3354 len += sprintf(p + len, "crt:\t\t%s\n", enabled(status, 1));
3355 if (video_supported == TPACPI_VIDEO_NEW)
3356 len += sprintf(p + len, "dvi:\t\t%s\n", enabled(status, 3));
3357 len += sprintf(p + len, "auto:\t\t%s\n", enabled(autosw, 0));
3358 len += sprintf(p + len, "commands:\tlcd_enable, lcd_disable\n");
3359 len += sprintf(p + len, "commands:\tcrt_enable, crt_disable\n");
3360 if (video_supported == TPACPI_VIDEO_NEW)
3361 len += sprintf(p + len, "commands:\tdvi_enable, dvi_disable\n");
3362 len += sprintf(p + len, "commands:\tauto_enable, auto_disable\n");
3363 len += sprintf(p + len, "commands:\tvideo_switch, expand_toggle\n");
3364
3365 return len;
3366 }
3367
3368 static int video_write(char *buf)
3369 {
3370 char *cmd;
3371 int enable, disable, status;
3372 int res;
3373
3374 if (video_supported == TPACPI_VIDEO_NONE)
3375 return -ENODEV;
3376
3377 enable = 0;
3378 disable = 0;
3379
3380 while ((cmd = next_cmd(&buf))) {
3381 if (strlencmp(cmd, "lcd_enable") == 0) {
3382 enable |= TP_ACPI_VIDEO_S_LCD;
3383 } else if (strlencmp(cmd, "lcd_disable") == 0) {
3384 disable |= TP_ACPI_VIDEO_S_LCD;
3385 } else if (strlencmp(cmd, "crt_enable") == 0) {
3386 enable |= TP_ACPI_VIDEO_S_CRT;
3387 } else if (strlencmp(cmd, "crt_disable") == 0) {
3388 disable |= TP_ACPI_VIDEO_S_CRT;
3389 } else if (video_supported == TPACPI_VIDEO_NEW &&
3390 strlencmp(cmd, "dvi_enable") == 0) {
3391 enable |= TP_ACPI_VIDEO_S_DVI;
3392 } else if (video_supported == TPACPI_VIDEO_NEW &&
3393 strlencmp(cmd, "dvi_disable") == 0) {
3394 disable |= TP_ACPI_VIDEO_S_DVI;
3395 } else if (strlencmp(cmd, "auto_enable") == 0) {
3396 res = video_autosw_set(1);
3397 if (res)
3398 return res;
3399 } else if (strlencmp(cmd, "auto_disable") == 0) {
3400 res = video_autosw_set(0);
3401 if (res)
3402 return res;
3403 } else if (strlencmp(cmd, "video_switch") == 0) {
3404 res = video_outputsw_cycle();
3405 if (res)
3406 return res;
3407 } else if (strlencmp(cmd, "expand_toggle") == 0) {
3408 res = video_expand_toggle();
3409 if (res)
3410 return res;
3411 } else
3412 return -EINVAL;
3413 }
3414
3415 if (enable || disable) {
3416 status = video_outputsw_get();
3417 if (status < 0)
3418 return status;
3419 res = video_outputsw_set((status & ~disable) | enable);
3420 if (res)
3421 return res;
3422 }
3423
3424 return 0;
3425 }
3426
3427 static struct ibm_struct video_driver_data = {
3428 .name = "video",
3429 .read = video_read,
3430 .write = video_write,
3431 .exit = video_exit,
3432 };
3433
3434 #endif /* CONFIG_THINKPAD_ACPI_VIDEO */
3435
3436 /*************************************************************************
3437 * Light (thinklight) subdriver
3438 */
3439
3440 TPACPI_HANDLE(lght, root, "\\LGHT"); /* A21e, A2xm/p, T20-22, X20-21 */
3441 TPACPI_HANDLE(ledb, ec, "LEDB"); /* G4x */
3442
3443 static int light_get_status(void)
3444 {
3445 int status = 0;
3446
3447 if (tp_features.light_status) {
3448 if (!acpi_evalf(ec_handle, &status, "KBLT", "d"))
3449 return -EIO;
3450 return (!!status);
3451 }
3452
3453 return -ENXIO;
3454 }
3455
3456 static int light_set_status(int status)
3457 {
3458 int rc;
3459
3460 if (tp_features.light) {
3461 if (cmos_handle) {
3462 rc = acpi_evalf(cmos_handle, NULL, NULL, "vd",
3463 (status)?
3464 TP_CMOS_THINKLIGHT_ON :
3465 TP_CMOS_THINKLIGHT_OFF);
3466 } else {
3467 rc = acpi_evalf(lght_handle, NULL, NULL, "vd",
3468 (status)? 1 : 0);
3469 }
3470 return (rc)? 0 : -EIO;
3471 }
3472
3473 return -ENXIO;
3474 }
3475
3476 static void light_set_status_worker(struct work_struct *work)
3477 {
3478 struct tpacpi_led_classdev *data =
3479 container_of(work, struct tpacpi_led_classdev, work);
3480
3481 if (likely(tpacpi_lifecycle == TPACPI_LIFE_RUNNING))
3482 light_set_status((data->new_brightness != LED_OFF));
3483 }
3484
3485 static void light_sysfs_set(struct led_classdev *led_cdev,
3486 enum led_brightness brightness)
3487 {
3488 struct tpacpi_led_classdev *data =
3489 container_of(led_cdev,
3490 struct tpacpi_led_classdev,
3491 led_classdev);
3492 data->new_brightness = brightness;
3493 queue_work(tpacpi_wq, &data->work);
3494 }
3495
3496 static enum led_brightness light_sysfs_get(struct led_classdev *led_cdev)
3497 {
3498 return (light_get_status() == 1)? LED_FULL : LED_OFF;
3499 }
3500
3501 static struct tpacpi_led_classdev tpacpi_led_thinklight = {
3502 .led_classdev = {
3503 .name = "tpacpi::thinklight",
3504 .brightness_set = &light_sysfs_set,
3505 .brightness_get = &light_sysfs_get,
3506 }
3507 };
3508
3509 static int __init light_init(struct ibm_init_struct *iibm)
3510 {
3511 int rc;
3512
3513 vdbg_printk(TPACPI_DBG_INIT, "initializing light subdriver\n");
3514
3515 TPACPI_ACPIHANDLE_INIT(ledb);
3516 TPACPI_ACPIHANDLE_INIT(lght);
3517 TPACPI_ACPIHANDLE_INIT(cmos);
3518 INIT_WORK(&tpacpi_led_thinklight.work, light_set_status_worker);
3519
3520 /* light not supported on 570, 600e/x, 770e, 770x, G4x, R30, R31 */
3521 tp_features.light = (cmos_handle || lght_handle) && !ledb_handle;
3522
3523 if (tp_features.light)
3524 /* light status not supported on
3525 570, 600e/x, 770e, 770x, G4x, R30, R31, R32, X20 */
3526 tp_features.light_status =
3527 acpi_evalf(ec_handle, NULL, "KBLT", "qv");
3528
3529 vdbg_printk(TPACPI_DBG_INIT, "light is %s, light status is %s\n",
3530 str_supported(tp_features.light),
3531 str_supported(tp_features.light_status));
3532
3533 if (!tp_features.light)
3534 return 1;
3535
3536 rc = led_classdev_register(&tpacpi_pdev->dev,
3537 &tpacpi_led_thinklight.led_classdev);
3538
3539 if (rc < 0) {
3540 tp_features.light = 0;
3541 tp_features.light_status = 0;
3542 } else {
3543 rc = 0;
3544 }
3545
3546 return rc;
3547 }
3548
3549 static void light_exit(void)
3550 {
3551 led_classdev_unregister(&tpacpi_led_thinklight.led_classdev);
3552 if (work_pending(&tpacpi_led_thinklight.work))
3553 flush_workqueue(tpacpi_wq);
3554 }
3555
3556 static int light_read(char *p)
3557 {
3558 int len = 0;
3559 int status;
3560
3561 if (!tp_features.light) {
3562 len += sprintf(p + len, "status:\t\tnot supported\n");
3563 } else if (!tp_features.light_status) {
3564 len += sprintf(p + len, "status:\t\tunknown\n");
3565 len += sprintf(p + len, "commands:\ton, off\n");
3566 } else {
3567 status = light_get_status();
3568 if (status < 0)
3569 return status;
3570 len += sprintf(p + len, "status:\t\t%s\n", onoff(status, 0));
3571 len += sprintf(p + len, "commands:\ton, off\n");
3572 }
3573
3574 return len;
3575 }
3576
3577 static int light_write(char *buf)
3578 {
3579 char *cmd;
3580 int newstatus = 0;
3581
3582 if (!tp_features.light)
3583 return -ENODEV;
3584
3585 while ((cmd = next_cmd(&buf))) {
3586 if (strlencmp(cmd, "on") == 0) {
3587 newstatus = 1;
3588 } else if (strlencmp(cmd, "off") == 0) {
3589 newstatus = 0;
3590 } else
3591 return -EINVAL;
3592 }
3593
3594 return light_set_status(newstatus);
3595 }
3596
3597 static struct ibm_struct light_driver_data = {
3598 .name = "light",
3599 .read = light_read,
3600 .write = light_write,
3601 .exit = light_exit,
3602 };
3603
3604 /*************************************************************************
3605 * Dock subdriver
3606 */
3607
3608 #ifdef CONFIG_THINKPAD_ACPI_DOCK
3609
3610 static void dock_notify(struct ibm_struct *ibm, u32 event);
3611 static int dock_read(char *p);
3612 static int dock_write(char *buf);
3613
3614 TPACPI_HANDLE(dock, root, "\\_SB.GDCK", /* X30, X31, X40 */
3615 "\\_SB.PCI0.DOCK", /* 600e/x,770e,770x,A2xm/p,T20-22,X20-21 */
3616 "\\_SB.PCI0.PCI1.DOCK", /* all others */
3617 "\\_SB.PCI.ISA.SLCE", /* 570 */
3618 ); /* A21e,G4x,R30,R31,R32,R40,R40e,R50e */
3619
3620 /* don't list other alternatives as we install a notify handler on the 570 */
3621 TPACPI_HANDLE(pci, root, "\\_SB.PCI"); /* 570 */
3622
3623 static const struct acpi_device_id ibm_pci_device_ids[] = {
3624 {PCI_ROOT_HID_STRING, 0},
3625 {"", 0},
3626 };
3627
3628 static struct tp_acpi_drv_struct ibm_dock_acpidriver[2] = {
3629 {
3630 .notify = dock_notify,
3631 .handle = &dock_handle,
3632 .type = ACPI_SYSTEM_NOTIFY,
3633 },
3634 {
3635 /* THIS ONE MUST NEVER BE USED FOR DRIVER AUTOLOADING.
3636 * We just use it to get notifications of dock hotplug
3637 * in very old thinkpads */
3638 .hid = ibm_pci_device_ids,
3639 .notify = dock_notify,
3640 .handle = &pci_handle,
3641 .type = ACPI_SYSTEM_NOTIFY,
3642 },
3643 };
3644
3645 static struct ibm_struct dock_driver_data[2] = {
3646 {
3647 .name = "dock",
3648 .read = dock_read,
3649 .write = dock_write,
3650 .acpi = &ibm_dock_acpidriver[0],
3651 },
3652 {
3653 .name = "dock",
3654 .acpi = &ibm_dock_acpidriver[1],
3655 },
3656 };
3657
3658 #define dock_docked() (_sta(dock_handle) & 1)
3659
3660 static int __init dock_init(struct ibm_init_struct *iibm)
3661 {
3662 vdbg_printk(TPACPI_DBG_INIT, "initializing dock subdriver\n");
3663
3664 TPACPI_ACPIHANDLE_INIT(dock);
3665
3666 vdbg_printk(TPACPI_DBG_INIT, "dock is %s\n",
3667 str_supported(dock_handle != NULL));
3668
3669 return (dock_handle)? 0 : 1;
3670 }
3671
3672 static int __init dock_init2(struct ibm_init_struct *iibm)
3673 {
3674 int dock2_needed;
3675
3676 vdbg_printk(TPACPI_DBG_INIT, "initializing dock subdriver part 2\n");
3677
3678 if (dock_driver_data[0].flags.acpi_driver_registered &&
3679 dock_driver_data[0].flags.acpi_notify_installed) {
3680 TPACPI_ACPIHANDLE_INIT(pci);
3681 dock2_needed = (pci_handle != NULL);
3682 vdbg_printk(TPACPI_DBG_INIT,
3683 "dock PCI handler for the TP 570 is %s\n",
3684 str_supported(dock2_needed));
3685 } else {
3686 vdbg_printk(TPACPI_DBG_INIT,
3687 "dock subdriver part 2 not required\n");
3688 dock2_needed = 0;
3689 }
3690
3691 return (dock2_needed)? 0 : 1;
3692 }
3693
3694 static void dock_notify(struct ibm_struct *ibm, u32 event)
3695 {
3696 int docked = dock_docked();
3697 int pci = ibm->acpi->hid && ibm->acpi->device &&
3698 acpi_match_device_ids(ibm->acpi->device, ibm_pci_device_ids);
3699 int data;
3700
3701 if (event == 1 && !pci) /* 570 */
3702 data = 1; /* button */
3703 else if (event == 1 && pci) /* 570 */
3704 data = 3; /* dock */
3705 else if (event == 3 && docked)
3706 data = 1; /* button */
3707 else if (event == 3 && !docked)
3708 data = 2; /* undock */
3709 else if (event == 0 && docked)
3710 data = 3; /* dock */
3711 else {
3712 printk(TPACPI_ERR "unknown dock event %d, status %d\n",
3713 event, _sta(dock_handle));
3714 data = 0; /* unknown */
3715 }
3716 acpi_bus_generate_proc_event(ibm->acpi->device, event, data);
3717 acpi_bus_generate_netlink_event(ibm->acpi->device->pnp.device_class,
3718 ibm->acpi->device->dev.bus_id,
3719 event, data);
3720 }
3721
3722 static int dock_read(char *p)
3723 {
3724 int len = 0;
3725 int docked = dock_docked();
3726
3727 if (!dock_handle)
3728 len += sprintf(p + len, "status:\t\tnot supported\n");
3729 else if (!docked)
3730 len += sprintf(p + len, "status:\t\tundocked\n");
3731 else {
3732 len += sprintf(p + len, "status:\t\tdocked\n");
3733 len += sprintf(p + len, "commands:\tdock, undock\n");
3734 }
3735
3736 return len;
3737 }
3738
3739 static int dock_write(char *buf)
3740 {
3741 char *cmd;
3742
3743 if (!dock_docked())
3744 return -ENODEV;
3745
3746 while ((cmd = next_cmd(&buf))) {
3747 if (strlencmp(cmd, "undock") == 0) {
3748 if (!acpi_evalf(dock_handle, NULL, "_DCK", "vd", 0) ||
3749 !acpi_evalf(dock_handle, NULL, "_EJ0", "vd", 1))
3750 return -EIO;
3751 } else if (strlencmp(cmd, "dock") == 0) {
3752 if (!acpi_evalf(dock_handle, NULL, "_DCK", "vd", 1))
3753 return -EIO;
3754 } else
3755 return -EINVAL;
3756 }
3757
3758 return 0;
3759 }
3760
3761 #endif /* CONFIG_THINKPAD_ACPI_DOCK */
3762
3763 /*************************************************************************
3764 * Bay subdriver
3765 */
3766
3767 #ifdef CONFIG_THINKPAD_ACPI_BAY
3768
3769 TPACPI_HANDLE(bay, root, "\\_SB.PCI.IDE.SECN.MAST", /* 570 */
3770 "\\_SB.PCI0.IDE0.IDES.IDSM", /* 600e/x, 770e, 770x */
3771 "\\_SB.PCI0.SATA.SCND.MSTR", /* T60, X60, Z60 */
3772 "\\_SB.PCI0.IDE0.SCND.MSTR", /* all others */
3773 ); /* A21e, R30, R31 */
3774 TPACPI_HANDLE(bay_ej, bay, "_EJ3", /* 600e/x, A2xm/p, A3x */
3775 "_EJ0", /* all others */
3776 ); /* 570,A21e,G4x,R30,R31,R32,R40e,R50e */
3777 TPACPI_HANDLE(bay2, root, "\\_SB.PCI0.IDE0.PRIM.SLAV", /* A3x, R32 */
3778 "\\_SB.PCI0.IDE0.IDEP.IDPS", /* 600e/x, 770e, 770x */
3779 ); /* all others */
3780 TPACPI_HANDLE(bay2_ej, bay2, "_EJ3", /* 600e/x, 770e, A3x */
3781 "_EJ0", /* 770x */
3782 ); /* all others */
3783
3784 static int __init bay_init(struct ibm_init_struct *iibm)
3785 {
3786 vdbg_printk(TPACPI_DBG_INIT, "initializing bay subdriver\n");
3787
3788 TPACPI_ACPIHANDLE_INIT(bay);
3789 if (bay_handle)
3790 TPACPI_ACPIHANDLE_INIT(bay_ej);
3791 TPACPI_ACPIHANDLE_INIT(bay2);
3792 if (bay2_handle)
3793 TPACPI_ACPIHANDLE_INIT(bay2_ej);
3794
3795 tp_features.bay_status = bay_handle &&
3796 acpi_evalf(bay_handle, NULL, "_STA", "qv");
3797 tp_features.bay_status2 = bay2_handle &&
3798 acpi_evalf(bay2_handle, NULL, "_STA", "qv");
3799
3800 tp_features.bay_eject = bay_handle && bay_ej_handle &&
3801 (strlencmp(bay_ej_path, "_EJ0") == 0 || experimental);
3802 tp_features.bay_eject2 = bay2_handle && bay2_ej_handle &&
3803 (strlencmp(bay2_ej_path, "_EJ0") == 0 || experimental);
3804
3805 vdbg_printk(TPACPI_DBG_INIT,
3806 "bay 1: status %s, eject %s; bay 2: status %s, eject %s\n",
3807 str_supported(tp_features.bay_status),
3808 str_supported(tp_features.bay_eject),
3809 str_supported(tp_features.bay_status2),
3810 str_supported(tp_features.bay_eject2));
3811
3812 return (tp_features.bay_status || tp_features.bay_eject ||
3813 tp_features.bay_status2 || tp_features.bay_eject2)? 0 : 1;
3814 }
3815
3816 static void bay_notify(struct ibm_struct *ibm, u32 event)
3817 {
3818 acpi_bus_generate_proc_event(ibm->acpi->device, event, 0);
3819 acpi_bus_generate_netlink_event(ibm->acpi->device->pnp.device_class,
3820 ibm->acpi->device->dev.bus_id,
3821 event, 0);
3822 }
3823
3824 #define bay_occupied(b) (_sta(b##_handle) & 1)
3825
3826 static int bay_read(char *p)
3827 {
3828 int len = 0;
3829 int occupied = bay_occupied(bay);
3830 int occupied2 = bay_occupied(bay2);
3831 int eject, eject2;
3832
3833 len += sprintf(p + len, "status:\t\t%s\n",
3834 tp_features.bay_status ?
3835 (occupied ? "occupied" : "unoccupied") :
3836 "not supported");
3837 if (tp_features.bay_status2)
3838 len += sprintf(p + len, "status2:\t%s\n", occupied2 ?
3839 "occupied" : "unoccupied");
3840
3841 eject = tp_features.bay_eject && occupied;
3842 eject2 = tp_features.bay_eject2 && occupied2;
3843
3844 if (eject && eject2)
3845 len += sprintf(p + len, "commands:\teject, eject2\n");
3846 else if (eject)
3847 len += sprintf(p + len, "commands:\teject\n");
3848 else if (eject2)
3849 len += sprintf(p + len, "commands:\teject2\n");
3850
3851 return len;
3852 }
3853
3854 static int bay_write(char *buf)
3855 {
3856 char *cmd;
3857
3858 if (!tp_features.bay_eject && !tp_features.bay_eject2)
3859 return -ENODEV;
3860
3861 while ((cmd = next_cmd(&buf))) {
3862 if (tp_features.bay_eject && strlencmp(cmd, "eject") == 0) {
3863 if (!acpi_evalf(bay_ej_handle, NULL, NULL, "vd", 1))
3864 return -EIO;
3865 } else if (tp_features.bay_eject2 &&
3866 strlencmp(cmd, "eject2") == 0) {
3867 if (!acpi_evalf(bay2_ej_handle, NULL, NULL, "vd", 1))
3868 return -EIO;
3869 } else
3870 return -EINVAL;
3871 }
3872
3873 return 0;
3874 }
3875
3876 static struct tp_acpi_drv_struct ibm_bay_acpidriver = {
3877 .notify = bay_notify,
3878 .handle = &bay_handle,
3879 .type = ACPI_SYSTEM_NOTIFY,
3880 };
3881
3882 static struct ibm_struct bay_driver_data = {
3883 .name = "bay",
3884 .read = bay_read,
3885 .write = bay_write,
3886 .acpi = &ibm_bay_acpidriver,
3887 };
3888
3889 #endif /* CONFIG_THINKPAD_ACPI_BAY */
3890
3891 /*************************************************************************
3892 * CMOS subdriver
3893 */
3894
3895 /* sysfs cmos_command -------------------------------------------------- */
3896 static ssize_t cmos_command_store(struct device *dev,
3897 struct device_attribute *attr,
3898 const char *buf, size_t count)
3899 {
3900 unsigned long cmos_cmd;
3901 int res;
3902
3903 if (parse_strtoul(buf, 21, &cmos_cmd))
3904 return -EINVAL;
3905
3906 res = issue_thinkpad_cmos_command(cmos_cmd);
3907 return (res)? res : count;
3908 }
3909
3910 static struct device_attribute dev_attr_cmos_command =
3911 __ATTR(cmos_command, S_IWUSR, NULL, cmos_command_store);
3912
3913 /* --------------------------------------------------------------------- */
3914
3915 static int __init cmos_init(struct ibm_init_struct *iibm)
3916 {
3917 int res;
3918
3919 vdbg_printk(TPACPI_DBG_INIT,
3920 "initializing cmos commands subdriver\n");
3921
3922 TPACPI_ACPIHANDLE_INIT(cmos);
3923
3924 vdbg_printk(TPACPI_DBG_INIT, "cmos commands are %s\n",
3925 str_supported(cmos_handle != NULL));
3926
3927 res = device_create_file(&tpacpi_pdev->dev, &dev_attr_cmos_command);
3928 if (res)
3929 return res;
3930
3931 return (cmos_handle)? 0 : 1;
3932 }
3933
3934 static void cmos_exit(void)
3935 {
3936 device_remove_file(&tpacpi_pdev->dev, &dev_attr_cmos_command);
3937 }
3938
3939 static int cmos_read(char *p)
3940 {
3941 int len = 0;
3942
3943 /* cmos not supported on 570, 600e/x, 770e, 770x, A21e, A2xm/p,
3944 R30, R31, T20-22, X20-21 */
3945 if (!cmos_handle)
3946 len += sprintf(p + len, "status:\t\tnot supported\n");
3947 else {
3948 len += sprintf(p + len, "status:\t\tsupported\n");
3949 len += sprintf(p + len, "commands:\t<cmd> (<cmd> is 0-21)\n");
3950 }
3951
3952 return len;
3953 }
3954
3955 static int cmos_write(char *buf)
3956 {
3957 char *cmd;
3958 int cmos_cmd, res;
3959
3960 while ((cmd = next_cmd(&buf))) {
3961 if (sscanf(cmd, "%u", &cmos_cmd) == 1 &&
3962 cmos_cmd >= 0 && cmos_cmd <= 21) {
3963 /* cmos_cmd set */
3964 } else
3965 return -EINVAL;
3966
3967 res = issue_thinkpad_cmos_command(cmos_cmd);
3968 if (res)
3969 return res;
3970 }
3971
3972 return 0;
3973 }
3974
3975 static struct ibm_struct cmos_driver_data = {
3976 .name = "cmos",
3977 .read = cmos_read,
3978 .write = cmos_write,
3979 .exit = cmos_exit,
3980 };
3981
3982 /*************************************************************************
3983 * LED subdriver
3984 */
3985
3986 enum led_access_mode {
3987 TPACPI_LED_NONE = 0,
3988 TPACPI_LED_570, /* 570 */
3989 TPACPI_LED_OLD, /* 600e/x, 770e, 770x, A21e, A2xm/p, T20-22, X20-21 */
3990 TPACPI_LED_NEW, /* all others */
3991 };
3992
3993 enum { /* For TPACPI_LED_OLD */
3994 TPACPI_LED_EC_HLCL = 0x0c, /* EC reg to get led to power on */
3995 TPACPI_LED_EC_HLBL = 0x0d, /* EC reg to blink a lit led */
3996 TPACPI_LED_EC_HLMS = 0x0e, /* EC reg to select led to command */
3997 };
3998
3999 enum led_status_t {
4000 TPACPI_LED_OFF = 0,
4001 TPACPI_LED_ON,
4002 TPACPI_LED_BLINK,
4003 };
4004
4005 static enum led_access_mode led_supported;
4006
4007 TPACPI_HANDLE(led, ec, "SLED", /* 570 */
4008 "SYSL", /* 600e/x, 770e, 770x, A21e, A2xm/p, */
4009 /* T20-22, X20-21 */
4010 "LED", /* all others */
4011 ); /* R30, R31 */
4012
4013 #define TPACPI_LED_NUMLEDS 8
4014 static struct tpacpi_led_classdev *tpacpi_leds;
4015 static enum led_status_t tpacpi_led_state_cache[TPACPI_LED_NUMLEDS];
4016 static const char * const tpacpi_led_names[TPACPI_LED_NUMLEDS] = {
4017 /* there's a limit of 19 chars + NULL before 2.6.26 */
4018 "tpacpi::power",
4019 "tpacpi:orange:batt",
4020 "tpacpi:green:batt",
4021 "tpacpi::dock_active",
4022 "tpacpi::bay_active",
4023 "tpacpi::dock_batt",
4024 "tpacpi::unknown_led",
4025 "tpacpi::standby",
4026 };
4027
4028 static int led_get_status(const unsigned int led)
4029 {
4030 int status;
4031 enum led_status_t led_s;
4032
4033 switch (led_supported) {
4034 case TPACPI_LED_570:
4035 if (!acpi_evalf(ec_handle,
4036 &status, "GLED", "dd", 1 << led))
4037 return -EIO;
4038 led_s = (status == 0)?
4039 TPACPI_LED_OFF :
4040 ((status == 1)?
4041 TPACPI_LED_ON :
4042 TPACPI_LED_BLINK);
4043 tpacpi_led_state_cache[led] = led_s;
4044 return led_s;
4045 default:
4046 return -ENXIO;
4047 }
4048
4049 /* not reached */
4050 }
4051
4052 static int led_set_status(const unsigned int led,
4053 const enum led_status_t ledstatus)
4054 {
4055 /* off, on, blink. Index is led_status_t */
4056 static const unsigned int led_sled_arg1[] = { 0, 1, 3 };
4057 static const unsigned int led_led_arg1[] = { 0, 0x80, 0xc0 };
4058
4059 int rc = 0;
4060
4061 switch (led_supported) {
4062 case TPACPI_LED_570:
4063 /* 570 */
4064 if (led > 7)
4065 return -EINVAL;
4066 if (!acpi_evalf(led_handle, NULL, NULL, "vdd",
4067 (1 << led), led_sled_arg1[ledstatus]))
4068 rc = -EIO;
4069 break;
4070 case TPACPI_LED_OLD:
4071 /* 600e/x, 770e, 770x, A21e, A2xm/p, T20-22, X20 */
4072 if (led > 7)
4073 return -EINVAL;
4074 rc = ec_write(TPACPI_LED_EC_HLMS, (1 << led));
4075 if (rc >= 0)
4076 rc = ec_write(TPACPI_LED_EC_HLBL,
4077 (ledstatus == TPACPI_LED_BLINK) << led);
4078 if (rc >= 0)
4079 rc = ec_write(TPACPI_LED_EC_HLCL,
4080 (ledstatus != TPACPI_LED_OFF) << led);
4081 break;
4082 case TPACPI_LED_NEW:
4083 /* all others */
4084 if (!acpi_evalf(led_handle, NULL, NULL, "vdd",
4085 led, led_led_arg1[ledstatus]))
4086 rc = -EIO;
4087 break;
4088 default:
4089 rc = -ENXIO;
4090 }
4091
4092 if (!rc)
4093 tpacpi_led_state_cache[led] = ledstatus;
4094
4095 return rc;
4096 }
4097
4098 static void led_sysfs_set_status(unsigned int led,
4099 enum led_brightness brightness)
4100 {
4101 led_set_status(led,
4102 (brightness == LED_OFF) ?
4103 TPACPI_LED_OFF :
4104 (tpacpi_led_state_cache[led] == TPACPI_LED_BLINK) ?
4105 TPACPI_LED_BLINK : TPACPI_LED_ON);
4106 }
4107
4108 static void led_set_status_worker(struct work_struct *work)
4109 {
4110 struct tpacpi_led_classdev *data =
4111 container_of(work, struct tpacpi_led_classdev, work);
4112
4113 if (likely(tpacpi_lifecycle == TPACPI_LIFE_RUNNING))
4114 led_sysfs_set_status(data->led, data->new_brightness);
4115 }
4116
4117 static void led_sysfs_set(struct led_classdev *led_cdev,
4118 enum led_brightness brightness)
4119 {
4120 struct tpacpi_led_classdev *data = container_of(led_cdev,
4121 struct tpacpi_led_classdev, led_classdev);
4122
4123 data->new_brightness = brightness;
4124 queue_work(tpacpi_wq, &data->work);
4125 }
4126
4127 static int led_sysfs_blink_set(struct led_classdev *led_cdev,
4128 unsigned long *delay_on, unsigned long *delay_off)
4129 {
4130 struct tpacpi_led_classdev *data = container_of(led_cdev,
4131 struct tpacpi_led_classdev, led_classdev);
4132
4133 /* Can we choose the flash rate? */
4134 if (*delay_on == 0 && *delay_off == 0) {
4135 /* yes. set them to the hardware blink rate (1 Hz) */
4136 *delay_on = 500; /* ms */
4137 *delay_off = 500; /* ms */
4138 } else if ((*delay_on != 500) || (*delay_off != 500))
4139 return -EINVAL;
4140
4141 data->new_brightness = TPACPI_LED_BLINK;
4142 queue_work(tpacpi_wq, &data->work);
4143
4144 return 0;
4145 }
4146
4147 static enum led_brightness led_sysfs_get(struct led_classdev *led_cdev)
4148 {
4149 int rc;
4150
4151 struct tpacpi_led_classdev *data = container_of(led_cdev,
4152 struct tpacpi_led_classdev, led_classdev);
4153
4154 rc = led_get_status(data->led);
4155
4156 if (rc == TPACPI_LED_OFF || rc < 0)
4157 rc = LED_OFF; /* no error handling in led class :( */
4158 else
4159 rc = LED_FULL;
4160
4161 return rc;
4162 }
4163
4164 static void led_exit(void)
4165 {
4166 unsigned int i;
4167
4168 for (i = 0; i < TPACPI_LED_NUMLEDS; i++) {
4169 if (tpacpi_leds[i].led_classdev.name)
4170 led_classdev_unregister(&tpacpi_leds[i].led_classdev);
4171 }
4172
4173 kfree(tpacpi_leds);
4174 }
4175
4176 static int __init led_init(struct ibm_init_struct *iibm)
4177 {
4178 unsigned int i;
4179 int rc;
4180
4181 vdbg_printk(TPACPI_DBG_INIT, "initializing LED subdriver\n");
4182
4183 TPACPI_ACPIHANDLE_INIT(led);
4184
4185 if (!led_handle)
4186 /* led not supported on R30, R31 */
4187 led_supported = TPACPI_LED_NONE;
4188 else if (strlencmp(led_path, "SLED") == 0)
4189 /* 570 */
4190 led_supported = TPACPI_LED_570;
4191 else if (strlencmp(led_path, "SYSL") == 0)
4192 /* 600e/x, 770e, 770x, A21e, A2xm/p, T20-22, X20-21 */
4193 led_supported = TPACPI_LED_OLD;
4194 else
4195 /* all others */
4196 led_supported = TPACPI_LED_NEW;
4197
4198 vdbg_printk(TPACPI_DBG_INIT, "LED commands are %s, mode %d\n",
4199 str_supported(led_supported), led_supported);
4200
4201 tpacpi_leds = kzalloc(sizeof(*tpacpi_leds) * TPACPI_LED_NUMLEDS,
4202 GFP_KERNEL);
4203 if (!tpacpi_leds) {
4204 printk(TPACPI_ERR "Out of memory for LED data\n");
4205 return -ENOMEM;
4206 }
4207
4208 for (i = 0; i < TPACPI_LED_NUMLEDS; i++) {
4209 tpacpi_leds[i].led = i;
4210
4211 tpacpi_leds[i].led_classdev.brightness_set = &led_sysfs_set;
4212 tpacpi_leds[i].led_classdev.blink_set = &led_sysfs_blink_set;
4213 if (led_supported == TPACPI_LED_570)
4214 tpacpi_leds[i].led_classdev.brightness_get =
4215 &led_sysfs_get;
4216
4217 tpacpi_leds[i].led_classdev.name = tpacpi_led_names[i];
4218
4219 INIT_WORK(&tpacpi_leds[i].work, led_set_status_worker);
4220
4221 rc = led_classdev_register(&tpacpi_pdev->dev,
4222 &tpacpi_leds[i].led_classdev);
4223 if (rc < 0) {
4224 tpacpi_leds[i].led_classdev.name = NULL;
4225 led_exit();
4226 return rc;
4227 }
4228 }
4229
4230 return (led_supported != TPACPI_LED_NONE)? 0 : 1;
4231 }
4232
4233 #define str_led_status(s) \
4234 ((s) == TPACPI_LED_OFF ? "off" : \
4235 ((s) == TPACPI_LED_ON ? "on" : "blinking"))
4236
4237 static int led_read(char *p)
4238 {
4239 int len = 0;
4240
4241 if (!led_supported) {
4242 len += sprintf(p + len, "status:\t\tnot supported\n");
4243 return len;
4244 }
4245 len += sprintf(p + len, "status:\t\tsupported\n");
4246
4247 if (led_supported == TPACPI_LED_570) {
4248 /* 570 */
4249 int i, status;
4250 for (i = 0; i < 8; i++) {
4251 status = led_get_status(i);
4252 if (status < 0)
4253 return -EIO;
4254 len += sprintf(p + len, "%d:\t\t%s\n",
4255 i, str_led_status(status));
4256 }
4257 }
4258
4259 len += sprintf(p + len, "commands:\t"
4260 "<led> on, <led> off, <led> blink (<led> is 0-7)\n");
4261
4262 return len;
4263 }
4264
4265 static int led_write(char *buf)
4266 {
4267 char *cmd;
4268 int led, rc;
4269 enum led_status_t s;
4270
4271 if (!led_supported)
4272 return -ENODEV;
4273
4274 while ((cmd = next_cmd(&buf))) {
4275 if (sscanf(cmd, "%d", &led) != 1 || led < 0 || led > 7)
4276 return -EINVAL;
4277
4278 if (strstr(cmd, "off")) {
4279 s = TPACPI_LED_OFF;
4280 } else if (strstr(cmd, "on")) {
4281 s = TPACPI_LED_ON;
4282 } else if (strstr(cmd, "blink")) {
4283 s = TPACPI_LED_BLINK;
4284 } else {
4285 return -EINVAL;
4286 }
4287
4288 rc = led_set_status(led, s);
4289 if (rc < 0)
4290 return rc;
4291 }
4292
4293 return 0;
4294 }
4295
4296 static struct ibm_struct led_driver_data = {
4297 .name = "led",
4298 .read = led_read,
4299 .write = led_write,
4300 .exit = led_exit,
4301 };
4302
4303 /*************************************************************************
4304 * Beep subdriver
4305 */
4306
4307 TPACPI_HANDLE(beep, ec, "BEEP"); /* all except R30, R31 */
4308
4309 static int __init beep_init(struct ibm_init_struct *iibm)
4310 {
4311 vdbg_printk(TPACPI_DBG_INIT, "initializing beep subdriver\n");
4312
4313 TPACPI_ACPIHANDLE_INIT(beep);
4314
4315 vdbg_printk(TPACPI_DBG_INIT, "beep is %s\n",
4316 str_supported(beep_handle != NULL));
4317
4318 return (beep_handle)? 0 : 1;
4319 }
4320
4321 static int beep_read(char *p)
4322 {
4323 int len = 0;
4324
4325 if (!beep_handle)
4326 len += sprintf(p + len, "status:\t\tnot supported\n");
4327 else {
4328 len += sprintf(p + len, "status:\t\tsupported\n");
4329 len += sprintf(p + len, "commands:\t<cmd> (<cmd> is 0-17)\n");
4330 }
4331
4332 return len;
4333 }
4334
4335 static int beep_write(char *buf)
4336 {
4337 char *cmd;
4338 int beep_cmd;
4339
4340 if (!beep_handle)
4341 return -ENODEV;
4342
4343 while ((cmd = next_cmd(&buf))) {
4344 if (sscanf(cmd, "%u", &beep_cmd) == 1 &&
4345 beep_cmd >= 0 && beep_cmd <= 17) {
4346 /* beep_cmd set */
4347 } else
4348 return -EINVAL;
4349 if (!acpi_evalf(beep_handle, NULL, NULL, "vdd", beep_cmd, 0))
4350 return -EIO;
4351 }
4352
4353 return 0;
4354 }
4355
4356 static struct ibm_struct beep_driver_data = {
4357 .name = "beep",
4358 .read = beep_read,
4359 .write = beep_write,
4360 };
4361
4362 /*************************************************************************
4363 * Thermal subdriver
4364 */
4365
4366 enum thermal_access_mode {
4367 TPACPI_THERMAL_NONE = 0, /* No thermal support */
4368 TPACPI_THERMAL_ACPI_TMP07, /* Use ACPI TMP0-7 */
4369 TPACPI_THERMAL_ACPI_UPDT, /* Use ACPI TMP0-7 with UPDT */
4370 TPACPI_THERMAL_TPEC_8, /* Use ACPI EC regs, 8 sensors */
4371 TPACPI_THERMAL_TPEC_16, /* Use ACPI EC regs, 16 sensors */
4372 };
4373
4374 enum { /* TPACPI_THERMAL_TPEC_* */
4375 TP_EC_THERMAL_TMP0 = 0x78, /* ACPI EC regs TMP 0..7 */
4376 TP_EC_THERMAL_TMP8 = 0xC0, /* ACPI EC regs TMP 8..15 */
4377 TP_EC_THERMAL_TMP_NA = -128, /* ACPI EC sensor not available */
4378 };
4379
4380 #define TPACPI_MAX_THERMAL_SENSORS 16 /* Max thermal sensors supported */
4381 struct ibm_thermal_sensors_struct {
4382 s32 temp[TPACPI_MAX_THERMAL_SENSORS];
4383 };
4384
4385 static enum thermal_access_mode thermal_read_mode;
4386
4387 /* idx is zero-based */
4388 static int thermal_get_sensor(int idx, s32 *value)
4389 {
4390 int t;
4391 s8 tmp;
4392 char tmpi[5];
4393
4394 t = TP_EC_THERMAL_TMP0;
4395
4396 switch (thermal_read_mode) {
4397 #if TPACPI_MAX_THERMAL_SENSORS >= 16
4398 case TPACPI_THERMAL_TPEC_16:
4399 if (idx >= 8 && idx <= 15) {
4400 t = TP_EC_THERMAL_TMP8;
4401 idx -= 8;
4402 }
4403 /* fallthrough */
4404 #endif
4405 case TPACPI_THERMAL_TPEC_8:
4406 if (idx <= 7) {
4407 if (!acpi_ec_read(t + idx, &tmp))
4408 return -EIO;
4409 *value = tmp * 1000;
4410 return 0;
4411 }
4412 break;
4413
4414 case TPACPI_THERMAL_ACPI_UPDT:
4415 if (idx <= 7) {
4416 snprintf(tmpi, sizeof(tmpi), "TMP%c", '0' + idx);
4417 if (!acpi_evalf(ec_handle, NULL, "UPDT", "v"))
4418 return -EIO;
4419 if (!acpi_evalf(ec_handle, &t, tmpi, "d"))
4420 return -EIO;
4421 *value = (t - 2732) * 100;
4422 return 0;
4423 }
4424 break;
4425
4426 case TPACPI_THERMAL_ACPI_TMP07:
4427 if (idx <= 7) {
4428 snprintf(tmpi, sizeof(tmpi), "TMP%c", '0' + idx);
4429 if (!acpi_evalf(ec_handle, &t, tmpi, "d"))
4430 return -EIO;
4431 if (t > 127 || t < -127)
4432 t = TP_EC_THERMAL_TMP_NA;
4433 *value = t * 1000;
4434 return 0;
4435 }
4436 break;
4437
4438 case TPACPI_THERMAL_NONE:
4439 default:
4440 return -ENOSYS;
4441 }
4442
4443 return -EINVAL;
4444 }
4445
4446 static int thermal_get_sensors(struct ibm_thermal_sensors_struct *s)
4447 {
4448 int res, i;
4449 int n;
4450
4451 n = 8;
4452 i = 0;
4453
4454 if (!s)
4455 return -EINVAL;
4456
4457 if (thermal_read_mode == TPACPI_THERMAL_TPEC_16)
4458 n = 16;
4459
4460 for (i = 0 ; i < n; i++) {
4461 res = thermal_get_sensor(i, &s->temp[i]);
4462 if (res)
4463 return res;
4464 }
4465
4466 return n;
4467 }
4468
4469 /* sysfs temp##_input -------------------------------------------------- */
4470
4471 static ssize_t thermal_temp_input_show(struct device *dev,
4472 struct device_attribute *attr,
4473 char *buf)
4474 {
4475 struct sensor_device_attribute *sensor_attr =
4476 to_sensor_dev_attr(attr);
4477 int idx = sensor_attr->index;
4478 s32 value;
4479 int res;
4480
4481 res = thermal_get_sensor(idx, &value);
4482 if (res)
4483 return res;
4484 if (value == TP_EC_THERMAL_TMP_NA * 1000)
4485 return -ENXIO;
4486
4487 return snprintf(buf, PAGE_SIZE, "%d\n", value);
4488 }
4489
4490 #define THERMAL_SENSOR_ATTR_TEMP(_idxA, _idxB) \
4491 SENSOR_ATTR(temp##_idxA##_input, S_IRUGO, \
4492 thermal_temp_input_show, NULL, _idxB)
4493
4494 static struct sensor_device_attribute sensor_dev_attr_thermal_temp_input[] = {
4495 THERMAL_SENSOR_ATTR_TEMP(1, 0),
4496 THERMAL_SENSOR_ATTR_TEMP(2, 1),
4497 THERMAL_SENSOR_ATTR_TEMP(3, 2),
4498 THERMAL_SENSOR_ATTR_TEMP(4, 3),
4499 THERMAL_SENSOR_ATTR_TEMP(5, 4),
4500 THERMAL_SENSOR_ATTR_TEMP(6, 5),
4501 THERMAL_SENSOR_ATTR_TEMP(7, 6),
4502 THERMAL_SENSOR_ATTR_TEMP(8, 7),
4503 THERMAL_SENSOR_ATTR_TEMP(9, 8),
4504 THERMAL_SENSOR_ATTR_TEMP(10, 9),
4505 THERMAL_SENSOR_ATTR_TEMP(11, 10),
4506 THERMAL_SENSOR_ATTR_TEMP(12, 11),
4507 THERMAL_SENSOR_ATTR_TEMP(13, 12),
4508 THERMAL_SENSOR_ATTR_TEMP(14, 13),
4509 THERMAL_SENSOR_ATTR_TEMP(15, 14),
4510 THERMAL_SENSOR_ATTR_TEMP(16, 15),
4511 };
4512
4513 #define THERMAL_ATTRS(X) \
4514 &sensor_dev_attr_thermal_temp_input[X].dev_attr.attr
4515
4516 static struct attribute *thermal_temp_input_attr[] = {
4517 THERMAL_ATTRS(8),
4518 THERMAL_ATTRS(9),
4519 THERMAL_ATTRS(10),
4520 THERMAL_ATTRS(11),
4521 THERMAL_ATTRS(12),
4522 THERMAL_ATTRS(13),
4523 THERMAL_ATTRS(14),
4524 THERMAL_ATTRS(15),
4525 THERMAL_ATTRS(0),
4526 THERMAL_ATTRS(1),
4527 THERMAL_ATTRS(2),
4528 THERMAL_ATTRS(3),
4529 THERMAL_ATTRS(4),
4530 THERMAL_ATTRS(5),
4531 THERMAL_ATTRS(6),
4532 THERMAL_ATTRS(7),
4533 NULL
4534 };
4535
4536 static const struct attribute_group thermal_temp_input16_group = {
4537 .attrs = thermal_temp_input_attr
4538 };
4539
4540 static const struct attribute_group thermal_temp_input8_group = {
4541 .attrs = &thermal_temp_input_attr[8]
4542 };
4543
4544 #undef THERMAL_SENSOR_ATTR_TEMP
4545 #undef THERMAL_ATTRS
4546
4547 /* --------------------------------------------------------------------- */
4548
4549 static int __init thermal_init(struct ibm_init_struct *iibm)
4550 {
4551 u8 t, ta1, ta2;
4552 int i;
4553 int acpi_tmp7;
4554 int res;
4555
4556 vdbg_printk(TPACPI_DBG_INIT, "initializing thermal subdriver\n");
4557
4558 acpi_tmp7 = acpi_evalf(ec_handle, NULL, "TMP7", "qv");
4559
4560 if (thinkpad_id.ec_model) {
4561 /*
4562 * Direct EC access mode: sensors at registers
4563 * 0x78-0x7F, 0xC0-0xC7. Registers return 0x00 for
4564 * non-implemented, thermal sensors return 0x80 when
4565 * not available
4566 */
4567
4568 ta1 = ta2 = 0;
4569 for (i = 0; i < 8; i++) {
4570 if (acpi_ec_read(TP_EC_THERMAL_TMP0 + i, &t)) {
4571 ta1 |= t;
4572 } else {
4573 ta1 = 0;
4574 break;
4575 }
4576 if (acpi_ec_read(TP_EC_THERMAL_TMP8 + i, &t)) {
4577 ta2 |= t;
4578 } else {
4579 ta1 = 0;
4580 break;
4581 }
4582 }
4583 if (ta1 == 0) {
4584 /* This is sheer paranoia, but we handle it anyway */
4585 if (acpi_tmp7) {
4586 printk(TPACPI_ERR
4587 "ThinkPad ACPI EC access misbehaving, "
4588 "falling back to ACPI TMPx access "
4589 "mode\n");
4590 thermal_read_mode = TPACPI_THERMAL_ACPI_TMP07;
4591 } else {
4592 printk(TPACPI_ERR
4593 "ThinkPad ACPI EC access misbehaving, "
4594 "disabling thermal sensors access\n");
4595 thermal_read_mode = TPACPI_THERMAL_NONE;
4596 }
4597 } else {
4598 thermal_read_mode =
4599 (ta2 != 0) ?
4600 TPACPI_THERMAL_TPEC_16 : TPACPI_THERMAL_TPEC_8;
4601 }
4602 } else if (acpi_tmp7) {
4603 if (acpi_evalf(ec_handle, NULL, "UPDT", "qv")) {
4604 /* 600e/x, 770e, 770x */
4605 thermal_read_mode = TPACPI_THERMAL_ACPI_UPDT;
4606 } else {
4607 /* Standard ACPI TMPx access, max 8 sensors */
4608 thermal_read_mode = TPACPI_THERMAL_ACPI_TMP07;
4609 }
4610 } else {
4611 /* temperatures not supported on 570, G4x, R30, R31, R32 */
4612 thermal_read_mode = TPACPI_THERMAL_NONE;
4613 }
4614
4615 vdbg_printk(TPACPI_DBG_INIT, "thermal is %s, mode %d\n",
4616 str_supported(thermal_read_mode != TPACPI_THERMAL_NONE),
4617 thermal_read_mode);
4618
4619 switch (thermal_read_mode) {
4620 case TPACPI_THERMAL_TPEC_16:
4621 res = sysfs_create_group(&tpacpi_sensors_pdev->dev.kobj,
4622 &thermal_temp_input16_group);
4623 if (res)
4624 return res;
4625 break;
4626 case TPACPI_THERMAL_TPEC_8:
4627 case TPACPI_THERMAL_ACPI_TMP07:
4628 case TPACPI_THERMAL_ACPI_UPDT:
4629 res = sysfs_create_group(&tpacpi_sensors_pdev->dev.kobj,
4630 &thermal_temp_input8_group);
4631 if (res)
4632 return res;
4633 break;
4634 case TPACPI_THERMAL_NONE:
4635 default:
4636 return 1;
4637 }
4638
4639 return 0;
4640 }
4641
4642 static void thermal_exit(void)
4643 {
4644 switch (thermal_read_mode) {
4645 case TPACPI_THERMAL_TPEC_16:
4646 sysfs_remove_group(&tpacpi_sensors_pdev->dev.kobj,
4647 &thermal_temp_input16_group);
4648 break;
4649 case TPACPI_THERMAL_TPEC_8:
4650 case TPACPI_THERMAL_ACPI_TMP07:
4651 case TPACPI_THERMAL_ACPI_UPDT:
4652 sysfs_remove_group(&tpacpi_sensors_pdev->dev.kobj,
4653 &thermal_temp_input16_group);
4654 break;
4655 case TPACPI_THERMAL_NONE:
4656 default:
4657 break;
4658 }
4659 }
4660
4661 static int thermal_read(char *p)
4662 {
4663 int len = 0;
4664 int n, i;
4665 struct ibm_thermal_sensors_struct t;
4666
4667 n = thermal_get_sensors(&t);
4668 if (unlikely(n < 0))
4669 return n;
4670
4671 len += sprintf(p + len, "temperatures:\t");
4672
4673 if (n > 0) {
4674 for (i = 0; i < (n - 1); i++)
4675 len += sprintf(p + len, "%d ", t.temp[i] / 1000);
4676 len += sprintf(p + len, "%d\n", t.temp[i] / 1000);
4677 } else
4678 len += sprintf(p + len, "not supported\n");
4679
4680 return len;
4681 }
4682
4683 static struct ibm_struct thermal_driver_data = {
4684 .name = "thermal",
4685 .read = thermal_read,
4686 .exit = thermal_exit,
4687 };
4688
4689 /*************************************************************************
4690 * EC Dump subdriver
4691 */
4692
4693 static u8 ecdump_regs[256];
4694
4695 static int ecdump_read(char *p)
4696 {
4697 int len = 0;
4698 int i, j;
4699 u8 v;
4700
4701 len += sprintf(p + len, "EC "
4702 " +00 +01 +02 +03 +04 +05 +06 +07"
4703 " +08 +09 +0a +0b +0c +0d +0e +0f\n");
4704 for (i = 0; i < 256; i += 16) {
4705 len += sprintf(p + len, "EC 0x%02x:", i);
4706 for (j = 0; j < 16; j++) {
4707 if (!acpi_ec_read(i + j, &v))
4708 break;
4709 if (v != ecdump_regs[i + j])
4710 len += sprintf(p + len, " *%02x", v);
4711 else
4712 len += sprintf(p + len, " %02x", v);
4713 ecdump_regs[i + j] = v;
4714 }
4715 len += sprintf(p + len, "\n");
4716 if (j != 16)
4717 break;
4718 }
4719
4720 /* These are way too dangerous to advertise openly... */
4721 #if 0
4722 len += sprintf(p + len, "commands:\t0x<offset> 0x<value>"
4723 " (<offset> is 00-ff, <value> is 00-ff)\n");
4724 len += sprintf(p + len, "commands:\t0x<offset> <value> "
4725 " (<offset> is 00-ff, <value> is 0-255)\n");
4726 #endif
4727 return len;
4728 }
4729
4730 static int ecdump_write(char *buf)
4731 {
4732 char *cmd;
4733 int i, v;
4734
4735 while ((cmd = next_cmd(&buf))) {
4736 if (sscanf(cmd, "0x%x 0x%x", &i, &v) == 2) {
4737 /* i and v set */
4738 } else if (sscanf(cmd, "0x%x %u", &i, &v) == 2) {
4739 /* i and v set */
4740 } else
4741 return -EINVAL;
4742 if (i >= 0 && i < 256 && v >= 0 && v < 256) {
4743 if (!acpi_ec_write(i, v))
4744 return -EIO;
4745 } else
4746 return -EINVAL;
4747 }
4748
4749 return 0;
4750 }
4751
4752 static struct ibm_struct ecdump_driver_data = {
4753 .name = "ecdump",
4754 .read = ecdump_read,
4755 .write = ecdump_write,
4756 .flags.experimental = 1,
4757 };
4758
4759 /*************************************************************************
4760 * Backlight/brightness subdriver
4761 */
4762
4763 #define TPACPI_BACKLIGHT_DEV_NAME "thinkpad_screen"
4764
4765 enum {
4766 TP_EC_BACKLIGHT = 0x31,
4767
4768 /* TP_EC_BACKLIGHT bitmasks */
4769 TP_EC_BACKLIGHT_LVLMSK = 0x1F,
4770 TP_EC_BACKLIGHT_CMDMSK = 0xE0,
4771 TP_EC_BACKLIGHT_MAPSW = 0x20,
4772 };
4773
4774 static struct backlight_device *ibm_backlight_device;
4775 static int brightness_mode;
4776 static unsigned int brightness_enable = 2; /* 2 = auto, 0 = no, 1 = yes */
4777
4778 static struct mutex brightness_mutex;
4779
4780 /*
4781 * ThinkPads can read brightness from two places: EC 0x31, or
4782 * CMOS NVRAM byte 0x5E, bits 0-3.
4783 *
4784 * EC 0x31 has the following layout
4785 * Bit 7: unknown function
4786 * Bit 6: unknown function
4787 * Bit 5: Z: honour scale changes, NZ: ignore scale changes
4788 * Bit 4: must be set to zero to avoid problems
4789 * Bit 3-0: backlight brightness level
4790 *
4791 * brightness_get_raw returns status data in the EC 0x31 layout
4792 */
4793 static int brightness_get_raw(int *status)
4794 {
4795 u8 lec = 0, lcmos = 0, level = 0;
4796
4797 if (brightness_mode & 1) {
4798 if (!acpi_ec_read(TP_EC_BACKLIGHT, &lec))
4799 return -EIO;
4800 level = lec & TP_EC_BACKLIGHT_LVLMSK;
4801 };
4802 if (brightness_mode & 2) {
4803 lcmos = (nvram_read_byte(TP_NVRAM_ADDR_BRIGHTNESS)
4804 & TP_NVRAM_MASK_LEVEL_BRIGHTNESS)
4805 >> TP_NVRAM_POS_LEVEL_BRIGHTNESS;
4806 lcmos &= (tp_features.bright_16levels)? 0x0f : 0x07;
4807 level = lcmos;
4808 }
4809
4810 if (brightness_mode == 3) {
4811 *status = lec; /* Prefer EC, CMOS is just a backing store */
4812 lec &= TP_EC_BACKLIGHT_LVLMSK;
4813 if (lec == lcmos)
4814 tp_warned.bright_cmos_ec_unsync = 0;
4815 else {
4816 if (!tp_warned.bright_cmos_ec_unsync) {
4817 printk(TPACPI_ERR
4818 "CMOS NVRAM (%u) and EC (%u) do not "
4819 "agree on display brightness level\n",
4820 (unsigned int) lcmos,
4821 (unsigned int) lec);
4822 tp_warned.bright_cmos_ec_unsync = 1;
4823 }
4824 return -EIO;
4825 }
4826 } else {
4827 *status = level;
4828 }
4829
4830 return 0;
4831 }
4832
4833 /* May return EINTR which can always be mapped to ERESTARTSYS */
4834 static int brightness_set(int value)
4835 {
4836 int cmos_cmd, inc, i, res;
4837 int current_value;
4838 int command_bits;
4839
4840 if (value > ((tp_features.bright_16levels)? 15 : 7) ||
4841 value < 0)
4842 return -EINVAL;
4843
4844 res = mutex_lock_interruptible(&brightness_mutex);
4845 if (res < 0)
4846 return res;
4847
4848 res = brightness_get_raw(&current_value);
4849 if (res < 0)
4850 goto errout;
4851
4852 command_bits = current_value & TP_EC_BACKLIGHT_CMDMSK;
4853 current_value &= TP_EC_BACKLIGHT_LVLMSK;
4854
4855 cmos_cmd = value > current_value ?
4856 TP_CMOS_BRIGHTNESS_UP :
4857 TP_CMOS_BRIGHTNESS_DOWN;
4858 inc = (value > current_value)? 1 : -1;
4859
4860 res = 0;
4861 for (i = current_value; i != value; i += inc) {
4862 if ((brightness_mode & 2) &&
4863 issue_thinkpad_cmos_command(cmos_cmd)) {
4864 res = -EIO;
4865 goto errout;
4866 }
4867 if ((brightness_mode & 1) &&
4868 !acpi_ec_write(TP_EC_BACKLIGHT,
4869 (i + inc) | command_bits)) {
4870 res = -EIO;
4871 goto errout;;
4872 }
4873 }
4874
4875 errout:
4876 mutex_unlock(&brightness_mutex);
4877 return res;
4878 }
4879
4880 /* sysfs backlight class ----------------------------------------------- */
4881
4882 static int brightness_update_status(struct backlight_device *bd)
4883 {
4884 /* it is the backlight class's job (caller) to handle
4885 * EINTR and other errors properly */
4886 return brightness_set(
4887 (bd->props.fb_blank == FB_BLANK_UNBLANK &&
4888 bd->props.power == FB_BLANK_UNBLANK) ?
4889 bd->props.brightness : 0);
4890 }
4891
4892 static int brightness_get(struct backlight_device *bd)
4893 {
4894 int status, res;
4895
4896 res = brightness_get_raw(&status);
4897 if (res < 0)
4898 return 0; /* FIXME: teach backlight about error handling */
4899
4900 return status & TP_EC_BACKLIGHT_LVLMSK;
4901 }
4902
4903 static struct backlight_ops ibm_backlight_data = {
4904 .get_brightness = brightness_get,
4905 .update_status = brightness_update_status,
4906 };
4907
4908 /* --------------------------------------------------------------------- */
4909
4910 static int __init brightness_init(struct ibm_init_struct *iibm)
4911 {
4912 int b;
4913
4914 vdbg_printk(TPACPI_DBG_INIT, "initializing brightness subdriver\n");
4915
4916 mutex_init(&brightness_mutex);
4917
4918 /*
4919 * We always attempt to detect acpi support, so as to switch
4920 * Lenovo Vista BIOS to ACPI brightness mode even if we are not
4921 * going to publish a backlight interface
4922 */
4923 b = tpacpi_check_std_acpi_brightness_support();
4924 if (b > 0) {
4925 if (thinkpad_id.vendor == PCI_VENDOR_ID_LENOVO) {
4926 printk(TPACPI_NOTICE
4927 "Lenovo BIOS switched to ACPI backlight "
4928 "control mode\n");
4929 }
4930 if (brightness_enable > 1) {
4931 printk(TPACPI_NOTICE
4932 "standard ACPI backlight interface "
4933 "available, not loading native one...\n");
4934 return 1;
4935 }
4936 }
4937
4938 if (!brightness_enable) {
4939 dbg_printk(TPACPI_DBG_INIT,
4940 "brightness support disabled by "
4941 "module parameter\n");
4942 return 1;
4943 }
4944
4945 if (b > 16) {
4946 printk(TPACPI_ERR
4947 "Unsupported brightness interface, "
4948 "please contact %s\n", TPACPI_MAIL);
4949 return 1;
4950 }
4951 if (b == 16)
4952 tp_features.bright_16levels = 1;
4953
4954 if (!brightness_mode) {
4955 if (thinkpad_id.vendor == PCI_VENDOR_ID_LENOVO)
4956 brightness_mode = 2;
4957 else
4958 brightness_mode = 3;
4959
4960 dbg_printk(TPACPI_DBG_INIT, "selected brightness_mode=%d\n",
4961 brightness_mode);
4962 }
4963
4964 if (brightness_mode > 3)
4965 return -EINVAL;
4966
4967 if (brightness_get_raw(&b) < 0)
4968 return 1;
4969
4970 if (tp_features.bright_16levels)
4971 printk(TPACPI_INFO
4972 "detected a 16-level brightness capable ThinkPad\n");
4973
4974 ibm_backlight_device = backlight_device_register(
4975 TPACPI_BACKLIGHT_DEV_NAME, NULL, NULL,
4976 &ibm_backlight_data);
4977 if (IS_ERR(ibm_backlight_device)) {
4978 printk(TPACPI_ERR "Could not register backlight device\n");
4979 return PTR_ERR(ibm_backlight_device);
4980 }
4981 vdbg_printk(TPACPI_DBG_INIT, "brightness is supported\n");
4982
4983 ibm_backlight_device->props.max_brightness =
4984 (tp_features.bright_16levels)? 15 : 7;
4985 ibm_backlight_device->props.brightness = b & TP_EC_BACKLIGHT_LVLMSK;
4986 backlight_update_status(ibm_backlight_device);
4987
4988 return 0;
4989 }
4990
4991 static void brightness_exit(void)
4992 {
4993 if (ibm_backlight_device) {
4994 vdbg_printk(TPACPI_DBG_EXIT,
4995 "calling backlight_device_unregister()\n");
4996 backlight_device_unregister(ibm_backlight_device);
4997 }
4998 }
4999
5000 static int brightness_read(char *p)
5001 {
5002 int len = 0;
5003 int level;
5004
5005 level = brightness_get(NULL);
5006 if (level < 0) {
5007 len += sprintf(p + len, "level:\t\tunreadable\n");
5008 } else {
5009 len += sprintf(p + len, "level:\t\t%d\n", level);
5010 len += sprintf(p + len, "commands:\tup, down\n");
5011 len += sprintf(p + len, "commands:\tlevel <level>"
5012 " (<level> is 0-%d)\n",
5013 (tp_features.bright_16levels) ? 15 : 7);
5014 }
5015
5016 return len;
5017 }
5018
5019 static int brightness_write(char *buf)
5020 {
5021 int level;
5022 int rc;
5023 char *cmd;
5024 int max_level = (tp_features.bright_16levels) ? 15 : 7;
5025
5026 level = brightness_get(NULL);
5027 if (level < 0)
5028 return level;
5029
5030 while ((cmd = next_cmd(&buf))) {
5031 if (strlencmp(cmd, "up") == 0) {
5032 if (level < max_level)
5033 level++;
5034 } else if (strlencmp(cmd, "down") == 0) {
5035 if (level > 0)
5036 level--;
5037 } else if (sscanf(cmd, "level %d", &level) == 1 &&
5038 level >= 0 && level <= max_level) {
5039 /* new level set */
5040 } else
5041 return -EINVAL;
5042 }
5043
5044 /*
5045 * Now we know what the final level should be, so we try to set it.
5046 * Doing it this way makes the syscall restartable in case of EINTR
5047 */
5048 rc = brightness_set(level);
5049 return (rc == -EINTR)? ERESTARTSYS : rc;
5050 }
5051
5052 static struct ibm_struct brightness_driver_data = {
5053 .name = "brightness",
5054 .read = brightness_read,
5055 .write = brightness_write,
5056 .exit = brightness_exit,
5057 };
5058
5059 /*************************************************************************
5060 * Volume subdriver
5061 */
5062
5063 static int volume_offset = 0x30;
5064
5065 static int volume_read(char *p)
5066 {
5067 int len = 0;
5068 u8 level;
5069
5070 if (!acpi_ec_read(volume_offset, &level)) {
5071 len += sprintf(p + len, "level:\t\tunreadable\n");
5072 } else {
5073 len += sprintf(p + len, "level:\t\t%d\n", level & 0xf);
5074 len += sprintf(p + len, "mute:\t\t%s\n", onoff(level, 6));
5075 len += sprintf(p + len, "commands:\tup, down, mute\n");
5076 len += sprintf(p + len, "commands:\tlevel <level>"
5077 " (<level> is 0-15)\n");
5078 }
5079
5080 return len;
5081 }
5082
5083 static int volume_write(char *buf)
5084 {
5085 int cmos_cmd, inc, i;
5086 u8 level, mute;
5087 int new_level, new_mute;
5088 char *cmd;
5089
5090 while ((cmd = next_cmd(&buf))) {
5091 if (!acpi_ec_read(volume_offset, &level))
5092 return -EIO;
5093 new_mute = mute = level & 0x40;
5094 new_level = level = level & 0xf;
5095
5096 if (strlencmp(cmd, "up") == 0) {
5097 if (mute)
5098 new_mute = 0;
5099 else
5100 new_level = level == 15 ? 15 : level + 1;
5101 } else if (strlencmp(cmd, "down") == 0) {
5102 if (mute)
5103 new_mute = 0;
5104 else
5105 new_level = level == 0 ? 0 : level - 1;
5106 } else if (sscanf(cmd, "level %d", &new_level) == 1 &&
5107 new_level >= 0 && new_level <= 15) {
5108 /* new_level set */
5109 } else if (strlencmp(cmd, "mute") == 0) {
5110 new_mute = 0x40;
5111 } else
5112 return -EINVAL;
5113
5114 if (new_level != level) {
5115 /* mute doesn't change */
5116
5117 cmos_cmd = (new_level > level) ?
5118 TP_CMOS_VOLUME_UP : TP_CMOS_VOLUME_DOWN;
5119 inc = new_level > level ? 1 : -1;
5120
5121 if (mute && (issue_thinkpad_cmos_command(cmos_cmd) ||
5122 !acpi_ec_write(volume_offset, level)))
5123 return -EIO;
5124
5125 for (i = level; i != new_level; i += inc)
5126 if (issue_thinkpad_cmos_command(cmos_cmd) ||
5127 !acpi_ec_write(volume_offset, i + inc))
5128 return -EIO;
5129
5130 if (mute &&
5131 (issue_thinkpad_cmos_command(TP_CMOS_VOLUME_MUTE) ||
5132 !acpi_ec_write(volume_offset, new_level + mute))) {
5133 return -EIO;
5134 }
5135 }
5136
5137 if (new_mute != mute) {
5138 /* level doesn't change */
5139
5140 cmos_cmd = (new_mute) ?
5141 TP_CMOS_VOLUME_MUTE : TP_CMOS_VOLUME_UP;
5142
5143 if (issue_thinkpad_cmos_command(cmos_cmd) ||
5144 !acpi_ec_write(volume_offset, level + new_mute))
5145 return -EIO;
5146 }
5147 }
5148
5149 return 0;
5150 }
5151
5152 static struct ibm_struct volume_driver_data = {
5153 .name = "volume",
5154 .read = volume_read,
5155 .write = volume_write,
5156 };
5157
5158 /*************************************************************************
5159 * Fan subdriver
5160 */
5161
5162 /*
5163 * FAN ACCESS MODES
5164 *
5165 * TPACPI_FAN_RD_ACPI_GFAN:
5166 * ACPI GFAN method: returns fan level
5167 *
5168 * see TPACPI_FAN_WR_ACPI_SFAN
5169 * EC 0x2f (HFSP) not available if GFAN exists
5170 *
5171 * TPACPI_FAN_WR_ACPI_SFAN:
5172 * ACPI SFAN method: sets fan level, 0 (stop) to 7 (max)
5173 *
5174 * EC 0x2f (HFSP) might be available *for reading*, but do not use
5175 * it for writing.
5176 *
5177 * TPACPI_FAN_WR_TPEC:
5178 * ThinkPad EC register 0x2f (HFSP): fan control loop mode
5179 * Supported on almost all ThinkPads
5180 *
5181 * Fan speed changes of any sort (including those caused by the
5182 * disengaged mode) are usually done slowly by the firmware as the
5183 * maximum ammount of fan duty cycle change per second seems to be
5184 * limited.
5185 *
5186 * Reading is not available if GFAN exists.
5187 * Writing is not available if SFAN exists.
5188 *
5189 * Bits
5190 * 7 automatic mode engaged;
5191 * (default operation mode of the ThinkPad)
5192 * fan level is ignored in this mode.
5193 * 6 full speed mode (takes precedence over bit 7);
5194 * not available on all thinkpads. May disable
5195 * the tachometer while the fan controller ramps up
5196 * the speed (which can take up to a few *minutes*).
5197 * Speeds up fan to 100% duty-cycle, which is far above
5198 * the standard RPM levels. It is not impossible that
5199 * it could cause hardware damage.
5200 * 5-3 unused in some models. Extra bits for fan level
5201 * in others, but still useless as all values above
5202 * 7 map to the same speed as level 7 in these models.
5203 * 2-0 fan level (0..7 usually)
5204 * 0x00 = stop
5205 * 0x07 = max (set when temperatures critical)
5206 * Some ThinkPads may have other levels, see
5207 * TPACPI_FAN_WR_ACPI_FANS (X31/X40/X41)
5208 *
5209 * FIRMWARE BUG: on some models, EC 0x2f might not be initialized at
5210 * boot. Apparently the EC does not intialize it, so unless ACPI DSDT
5211 * does so, its initial value is meaningless (0x07).
5212 *
5213 * For firmware bugs, refer to:
5214 * http://thinkwiki.org/wiki/Embedded_Controller_Firmware#Firmware_Issues
5215 *
5216 * ----
5217 *
5218 * ThinkPad EC register 0x84 (LSB), 0x85 (MSB):
5219 * Main fan tachometer reading (in RPM)
5220 *
5221 * This register is present on all ThinkPads with a new-style EC, and
5222 * it is known not to be present on the A21m/e, and T22, as there is
5223 * something else in offset 0x84 according to the ACPI DSDT. Other
5224 * ThinkPads from this same time period (and earlier) probably lack the
5225 * tachometer as well.
5226 *
5227 * Unfortunately a lot of ThinkPads with new-style ECs but whose firwmare
5228 * was never fixed by IBM to report the EC firmware version string
5229 * probably support the tachometer (like the early X models), so
5230 * detecting it is quite hard. We need more data to know for sure.
5231 *
5232 * FIRMWARE BUG: always read 0x84 first, otherwise incorrect readings
5233 * might result.
5234 *
5235 * FIRMWARE BUG: may go stale while the EC is switching to full speed
5236 * mode.
5237 *
5238 * For firmware bugs, refer to:
5239 * http://thinkwiki.org/wiki/Embedded_Controller_Firmware#Firmware_Issues
5240 *
5241 * TPACPI_FAN_WR_ACPI_FANS:
5242 * ThinkPad X31, X40, X41. Not available in the X60.
5243 *
5244 * FANS ACPI handle: takes three arguments: low speed, medium speed,
5245 * high speed. ACPI DSDT seems to map these three speeds to levels
5246 * as follows: STOP LOW LOW MED MED HIGH HIGH HIGH HIGH
5247 * (this map is stored on FAN0..FAN8 as "0,1,1,2,2,3,3,3,3")
5248 *
5249 * The speeds are stored on handles
5250 * (FANA:FAN9), (FANC:FANB), (FANE:FAND).
5251 *
5252 * There are three default speed sets, acessible as handles:
5253 * FS1L,FS1M,FS1H; FS2L,FS2M,FS2H; FS3L,FS3M,FS3H
5254 *
5255 * ACPI DSDT switches which set is in use depending on various
5256 * factors.
5257 *
5258 * TPACPI_FAN_WR_TPEC is also available and should be used to
5259 * command the fan. The X31/X40/X41 seems to have 8 fan levels,
5260 * but the ACPI tables just mention level 7.
5261 */
5262
5263 enum { /* Fan control constants */
5264 fan_status_offset = 0x2f, /* EC register 0x2f */
5265 fan_rpm_offset = 0x84, /* EC register 0x84: LSB, 0x85 MSB (RPM)
5266 * 0x84 must be read before 0x85 */
5267
5268 TP_EC_FAN_FULLSPEED = 0x40, /* EC fan mode: full speed */
5269 TP_EC_FAN_AUTO = 0x80, /* EC fan mode: auto fan control */
5270
5271 TPACPI_FAN_LAST_LEVEL = 0x100, /* Use cached last-seen fan level */
5272 };
5273
5274 enum fan_status_access_mode {
5275 TPACPI_FAN_NONE = 0, /* No fan status or control */
5276 TPACPI_FAN_RD_ACPI_GFAN, /* Use ACPI GFAN */
5277 TPACPI_FAN_RD_TPEC, /* Use ACPI EC regs 0x2f, 0x84-0x85 */
5278 };
5279
5280 enum fan_control_access_mode {
5281 TPACPI_FAN_WR_NONE = 0, /* No fan control */
5282 TPACPI_FAN_WR_ACPI_SFAN, /* Use ACPI SFAN */
5283 TPACPI_FAN_WR_TPEC, /* Use ACPI EC reg 0x2f */
5284 TPACPI_FAN_WR_ACPI_FANS, /* Use ACPI FANS and EC reg 0x2f */
5285 };
5286
5287 enum fan_control_commands {
5288 TPACPI_FAN_CMD_SPEED = 0x0001, /* speed command */
5289 TPACPI_FAN_CMD_LEVEL = 0x0002, /* level command */
5290 TPACPI_FAN_CMD_ENABLE = 0x0004, /* enable/disable cmd,
5291 * and also watchdog cmd */
5292 };
5293
5294 static int fan_control_allowed;
5295
5296 static enum fan_status_access_mode fan_status_access_mode;
5297 static enum fan_control_access_mode fan_control_access_mode;
5298 static enum fan_control_commands fan_control_commands;
5299
5300 static u8 fan_control_initial_status;
5301 static u8 fan_control_desired_level;
5302 static int fan_watchdog_maxinterval;
5303
5304 static struct mutex fan_mutex;
5305
5306 static void fan_watchdog_fire(struct work_struct *ignored);
5307 static DECLARE_DELAYED_WORK(fan_watchdog_task, fan_watchdog_fire);
5308
5309 TPACPI_HANDLE(fans, ec, "FANS"); /* X31, X40, X41 */
5310 TPACPI_HANDLE(gfan, ec, "GFAN", /* 570 */
5311 "\\FSPD", /* 600e/x, 770e, 770x */
5312 ); /* all others */
5313 TPACPI_HANDLE(sfan, ec, "SFAN", /* 570 */
5314 "JFNS", /* 770x-JL */
5315 ); /* all others */
5316
5317 /*
5318 * Call with fan_mutex held
5319 */
5320 static void fan_update_desired_level(u8 status)
5321 {
5322 if ((status &
5323 (TP_EC_FAN_AUTO | TP_EC_FAN_FULLSPEED)) == 0) {
5324 if (status > 7)
5325 fan_control_desired_level = 7;
5326 else
5327 fan_control_desired_level = status;
5328 }
5329 }
5330
5331 static int fan_get_status(u8 *status)
5332 {
5333 u8 s;
5334
5335 /* TODO:
5336 * Add TPACPI_FAN_RD_ACPI_FANS ? */
5337
5338 switch (fan_status_access_mode) {
5339 case TPACPI_FAN_RD_ACPI_GFAN:
5340 /* 570, 600e/x, 770e, 770x */
5341
5342 if (unlikely(!acpi_evalf(gfan_handle, &s, NULL, "d")))
5343 return -EIO;
5344
5345 if (likely(status))
5346 *status = s & 0x07;
5347
5348 break;
5349
5350 case TPACPI_FAN_RD_TPEC:
5351 /* all except 570, 600e/x, 770e, 770x */
5352 if (unlikely(!acpi_ec_read(fan_status_offset, &s)))
5353 return -EIO;
5354
5355 if (likely(status))
5356 *status = s;
5357
5358 break;
5359
5360 default:
5361 return -ENXIO;
5362 }
5363
5364 return 0;
5365 }
5366
5367 static int fan_get_status_safe(u8 *status)
5368 {
5369 int rc;
5370 u8 s;
5371
5372 if (mutex_lock_interruptible(&fan_mutex))
5373 return -ERESTARTSYS;
5374 rc = fan_get_status(&s);
5375 if (!rc)
5376 fan_update_desired_level(s);
5377 mutex_unlock(&fan_mutex);
5378
5379 if (status)
5380 *status = s;
5381
5382 return rc;
5383 }
5384
5385 static int fan_get_speed(unsigned int *speed)
5386 {
5387 u8 hi, lo;
5388
5389 switch (fan_status_access_mode) {
5390 case TPACPI_FAN_RD_TPEC:
5391 /* all except 570, 600e/x, 770e, 770x */
5392 if (unlikely(!acpi_ec_read(fan_rpm_offset, &lo) ||
5393 !acpi_ec_read(fan_rpm_offset + 1, &hi)))
5394 return -EIO;
5395
5396 if (likely(speed))
5397 *speed = (hi << 8) | lo;
5398
5399 break;
5400
5401 default:
5402 return -ENXIO;
5403 }
5404
5405 return 0;
5406 }
5407
5408 static int fan_set_level(int level)
5409 {
5410 if (!fan_control_allowed)
5411 return -EPERM;
5412
5413 switch (fan_control_access_mode) {
5414 case TPACPI_FAN_WR_ACPI_SFAN:
5415 if (level >= 0 && level <= 7) {
5416 if (!acpi_evalf(sfan_handle, NULL, NULL, "vd", level))
5417 return -EIO;
5418 } else
5419 return -EINVAL;
5420 break;
5421
5422 case TPACPI_FAN_WR_ACPI_FANS:
5423 case TPACPI_FAN_WR_TPEC:
5424 if ((level != TP_EC_FAN_AUTO) &&
5425 (level != TP_EC_FAN_FULLSPEED) &&
5426 ((level < 0) || (level > 7)))
5427 return -EINVAL;
5428
5429 /* safety net should the EC not support AUTO
5430 * or FULLSPEED mode bits and just ignore them */
5431 if (level & TP_EC_FAN_FULLSPEED)
5432 level |= 7; /* safety min speed 7 */
5433 else if (level & TP_EC_FAN_AUTO)
5434 level |= 4; /* safety min speed 4 */
5435
5436 if (!acpi_ec_write(fan_status_offset, level))
5437 return -EIO;
5438 else
5439 tp_features.fan_ctrl_status_undef = 0;
5440 break;
5441
5442 default:
5443 return -ENXIO;
5444 }
5445 return 0;
5446 }
5447
5448 static int fan_set_level_safe(int level)
5449 {
5450 int rc;
5451
5452 if (!fan_control_allowed)
5453 return -EPERM;
5454
5455 if (mutex_lock_interruptible(&fan_mutex))
5456 return -ERESTARTSYS;
5457
5458 if (level == TPACPI_FAN_LAST_LEVEL)
5459 level = fan_control_desired_level;
5460
5461 rc = fan_set_level(level);
5462 if (!rc)
5463 fan_update_desired_level(level);
5464
5465 mutex_unlock(&fan_mutex);
5466 return rc;
5467 }
5468
5469 static int fan_set_enable(void)
5470 {
5471 u8 s;
5472 int rc;
5473
5474 if (!fan_control_allowed)
5475 return -EPERM;
5476
5477 if (mutex_lock_interruptible(&fan_mutex))
5478 return -ERESTARTSYS;
5479
5480 switch (fan_control_access_mode) {
5481 case TPACPI_FAN_WR_ACPI_FANS:
5482 case TPACPI_FAN_WR_TPEC:
5483 rc = fan_get_status(&s);
5484 if (rc < 0)
5485 break;
5486
5487 /* Don't go out of emergency fan mode */
5488 if (s != 7) {
5489 s &= 0x07;
5490 s |= TP_EC_FAN_AUTO | 4; /* min fan speed 4 */
5491 }
5492
5493 if (!acpi_ec_write(fan_status_offset, s))
5494 rc = -EIO;
5495 else {
5496 tp_features.fan_ctrl_status_undef = 0;
5497 rc = 0;
5498 }
5499 break;
5500
5501 case TPACPI_FAN_WR_ACPI_SFAN:
5502 rc = fan_get_status(&s);
5503 if (rc < 0)
5504 break;
5505
5506 s &= 0x07;
5507
5508 /* Set fan to at least level 4 */
5509 s |= 4;
5510
5511 if (!acpi_evalf(sfan_handle, NULL, NULL, "vd", s))
5512 rc = -EIO;
5513 else
5514 rc = 0;
5515 break;
5516
5517 default:
5518 rc = -ENXIO;
5519 }
5520
5521 mutex_unlock(&fan_mutex);
5522 return rc;
5523 }
5524
5525 static int fan_set_disable(void)
5526 {
5527 int rc;
5528
5529 if (!fan_control_allowed)
5530 return -EPERM;
5531
5532 if (mutex_lock_interruptible(&fan_mutex))
5533 return -ERESTARTSYS;
5534
5535 rc = 0;
5536 switch (fan_control_access_mode) {
5537 case TPACPI_FAN_WR_ACPI_FANS:
5538 case TPACPI_FAN_WR_TPEC:
5539 if (!acpi_ec_write(fan_status_offset, 0x00))
5540 rc = -EIO;
5541 else {
5542 fan_control_desired_level = 0;
5543 tp_features.fan_ctrl_status_undef = 0;
5544 }
5545 break;
5546
5547 case TPACPI_FAN_WR_ACPI_SFAN:
5548 if (!acpi_evalf(sfan_handle, NULL, NULL, "vd", 0x00))
5549 rc = -EIO;
5550 else
5551 fan_control_desired_level = 0;
5552 break;
5553
5554 default:
5555 rc = -ENXIO;
5556 }
5557
5558
5559 mutex_unlock(&fan_mutex);
5560 return rc;
5561 }
5562
5563 static int fan_set_speed(int speed)
5564 {
5565 int rc;
5566
5567 if (!fan_control_allowed)
5568 return -EPERM;
5569
5570 if (mutex_lock_interruptible(&fan_mutex))
5571 return -ERESTARTSYS;
5572
5573 rc = 0;
5574 switch (fan_control_access_mode) {
5575 case TPACPI_FAN_WR_ACPI_FANS:
5576 if (speed >= 0 && speed <= 65535) {
5577 if (!acpi_evalf(fans_handle, NULL, NULL, "vddd",
5578 speed, speed, speed))
5579 rc = -EIO;
5580 } else
5581 rc = -EINVAL;
5582 break;
5583
5584 default:
5585 rc = -ENXIO;
5586 }
5587
5588 mutex_unlock(&fan_mutex);
5589 return rc;
5590 }
5591
5592 static void fan_watchdog_reset(void)
5593 {
5594 static int fan_watchdog_active;
5595
5596 if (fan_control_access_mode == TPACPI_FAN_WR_NONE)
5597 return;
5598
5599 if (fan_watchdog_active)
5600 cancel_delayed_work(&fan_watchdog_task);
5601
5602 if (fan_watchdog_maxinterval > 0 &&
5603 tpacpi_lifecycle != TPACPI_LIFE_EXITING) {
5604 fan_watchdog_active = 1;
5605 if (!queue_delayed_work(tpacpi_wq, &fan_watchdog_task,
5606 msecs_to_jiffies(fan_watchdog_maxinterval
5607 * 1000))) {
5608 printk(TPACPI_ERR
5609 "failed to queue the fan watchdog, "
5610 "watchdog will not trigger\n");
5611 }
5612 } else
5613 fan_watchdog_active = 0;
5614 }
5615
5616 static void fan_watchdog_fire(struct work_struct *ignored)
5617 {
5618 int rc;
5619
5620 if (tpacpi_lifecycle != TPACPI_LIFE_RUNNING)
5621 return;
5622
5623 printk(TPACPI_NOTICE "fan watchdog: enabling fan\n");
5624 rc = fan_set_enable();
5625 if (rc < 0) {
5626 printk(TPACPI_ERR "fan watchdog: error %d while enabling fan, "
5627 "will try again later...\n", -rc);
5628 /* reschedule for later */
5629 fan_watchdog_reset();
5630 }
5631 }
5632
5633 /*
5634 * SYSFS fan layout: hwmon compatible (device)
5635 *
5636 * pwm*_enable:
5637 * 0: "disengaged" mode
5638 * 1: manual mode
5639 * 2: native EC "auto" mode (recommended, hardware default)
5640 *
5641 * pwm*: set speed in manual mode, ignored otherwise.
5642 * 0 is level 0; 255 is level 7. Intermediate points done with linear
5643 * interpolation.
5644 *
5645 * fan*_input: tachometer reading, RPM
5646 *
5647 *
5648 * SYSFS fan layout: extensions
5649 *
5650 * fan_watchdog (driver):
5651 * fan watchdog interval in seconds, 0 disables (default), max 120
5652 */
5653
5654 /* sysfs fan pwm1_enable ----------------------------------------------- */
5655 static ssize_t fan_pwm1_enable_show(struct device *dev,
5656 struct device_attribute *attr,
5657 char *buf)
5658 {
5659 int res, mode;
5660 u8 status;
5661
5662 res = fan_get_status_safe(&status);
5663 if (res)
5664 return res;
5665
5666 if (unlikely(tp_features.fan_ctrl_status_undef)) {
5667 if (status != fan_control_initial_status) {
5668 tp_features.fan_ctrl_status_undef = 0;
5669 } else {
5670 /* Return most likely status. In fact, it
5671 * might be the only possible status */
5672 status = TP_EC_FAN_AUTO;
5673 }
5674 }
5675
5676 if (status & TP_EC_FAN_FULLSPEED) {
5677 mode = 0;
5678 } else if (status & TP_EC_FAN_AUTO) {
5679 mode = 2;
5680 } else
5681 mode = 1;
5682
5683 return snprintf(buf, PAGE_SIZE, "%d\n", mode);
5684 }
5685
5686 static ssize_t fan_pwm1_enable_store(struct device *dev,
5687 struct device_attribute *attr,
5688 const char *buf, size_t count)
5689 {
5690 unsigned long t;
5691 int res, level;
5692
5693 if (parse_strtoul(buf, 2, &t))
5694 return -EINVAL;
5695
5696 switch (t) {
5697 case 0:
5698 level = TP_EC_FAN_FULLSPEED;
5699 break;
5700 case 1:
5701 level = TPACPI_FAN_LAST_LEVEL;
5702 break;
5703 case 2:
5704 level = TP_EC_FAN_AUTO;
5705 break;
5706 case 3:
5707 /* reserved for software-controlled auto mode */
5708 return -ENOSYS;
5709 default:
5710 return -EINVAL;
5711 }
5712
5713 res = fan_set_level_safe(level);
5714 if (res == -ENXIO)
5715 return -EINVAL;
5716 else if (res < 0)
5717 return res;
5718
5719 fan_watchdog_reset();
5720
5721 return count;
5722 }
5723
5724 static struct device_attribute dev_attr_fan_pwm1_enable =
5725 __ATTR(pwm1_enable, S_IWUSR | S_IRUGO,
5726 fan_pwm1_enable_show, fan_pwm1_enable_store);
5727
5728 /* sysfs fan pwm1 ------------------------------------------------------ */
5729 static ssize_t fan_pwm1_show(struct device *dev,
5730 struct device_attribute *attr,
5731 char *buf)
5732 {
5733 int res;
5734 u8 status;
5735
5736 res = fan_get_status_safe(&status);
5737 if (res)
5738 return res;
5739
5740 if (unlikely(tp_features.fan_ctrl_status_undef)) {
5741 if (status != fan_control_initial_status) {
5742 tp_features.fan_ctrl_status_undef = 0;
5743 } else {
5744 status = TP_EC_FAN_AUTO;
5745 }
5746 }
5747
5748 if ((status &
5749 (TP_EC_FAN_AUTO | TP_EC_FAN_FULLSPEED)) != 0)
5750 status = fan_control_desired_level;
5751
5752 if (status > 7)
5753 status = 7;
5754
5755 return snprintf(buf, PAGE_SIZE, "%u\n", (status * 255) / 7);
5756 }
5757
5758 static ssize_t fan_pwm1_store(struct device *dev,
5759 struct device_attribute *attr,
5760 const char *buf, size_t count)
5761 {
5762 unsigned long s;
5763 int rc;
5764 u8 status, newlevel;
5765
5766 if (parse_strtoul(buf, 255, &s))
5767 return -EINVAL;
5768
5769 /* scale down from 0-255 to 0-7 */
5770 newlevel = (s >> 5) & 0x07;
5771
5772 if (mutex_lock_interruptible(&fan_mutex))
5773 return -ERESTARTSYS;
5774
5775 rc = fan_get_status(&status);
5776 if (!rc && (status &
5777 (TP_EC_FAN_AUTO | TP_EC_FAN_FULLSPEED)) == 0) {
5778 rc = fan_set_level(newlevel);
5779 if (rc == -ENXIO)
5780 rc = -EINVAL;
5781 else if (!rc) {
5782 fan_update_desired_level(newlevel);
5783 fan_watchdog_reset();
5784 }
5785 }
5786
5787 mutex_unlock(&fan_mutex);
5788 return (rc)? rc : count;
5789 }
5790
5791 static struct device_attribute dev_attr_fan_pwm1 =
5792 __ATTR(pwm1, S_IWUSR | S_IRUGO,
5793 fan_pwm1_show, fan_pwm1_store);
5794
5795 /* sysfs fan fan1_input ------------------------------------------------ */
5796 static ssize_t fan_fan1_input_show(struct device *dev,
5797 struct device_attribute *attr,
5798 char *buf)
5799 {
5800 int res;
5801 unsigned int speed;
5802
5803 res = fan_get_speed(&speed);
5804 if (res < 0)
5805 return res;
5806
5807 return snprintf(buf, PAGE_SIZE, "%u\n", speed);
5808 }
5809
5810 static struct device_attribute dev_attr_fan_fan1_input =
5811 __ATTR(fan1_input, S_IRUGO,
5812 fan_fan1_input_show, NULL);
5813
5814 /* sysfs fan fan_watchdog (hwmon driver) ------------------------------- */
5815 static ssize_t fan_fan_watchdog_show(struct device_driver *drv,
5816 char *buf)
5817 {
5818 return snprintf(buf, PAGE_SIZE, "%u\n", fan_watchdog_maxinterval);
5819 }
5820
5821 static ssize_t fan_fan_watchdog_store(struct device_driver *drv,
5822 const char *buf, size_t count)
5823 {
5824 unsigned long t;
5825
5826 if (parse_strtoul(buf, 120, &t))
5827 return -EINVAL;
5828
5829 if (!fan_control_allowed)
5830 return -EPERM;
5831
5832 fan_watchdog_maxinterval = t;
5833 fan_watchdog_reset();
5834
5835 return count;
5836 }
5837
5838 static DRIVER_ATTR(fan_watchdog, S_IWUSR | S_IRUGO,
5839 fan_fan_watchdog_show, fan_fan_watchdog_store);
5840
5841 /* --------------------------------------------------------------------- */
5842 static struct attribute *fan_attributes[] = {
5843 &dev_attr_fan_pwm1_enable.attr, &dev_attr_fan_pwm1.attr,
5844 &dev_attr_fan_fan1_input.attr,
5845 NULL
5846 };
5847
5848 static const struct attribute_group fan_attr_group = {
5849 .attrs = fan_attributes,
5850 };
5851
5852 static int __init fan_init(struct ibm_init_struct *iibm)
5853 {
5854 int rc;
5855
5856 vdbg_printk(TPACPI_DBG_INIT, "initializing fan subdriver\n");
5857
5858 mutex_init(&fan_mutex);
5859 fan_status_access_mode = TPACPI_FAN_NONE;
5860 fan_control_access_mode = TPACPI_FAN_WR_NONE;
5861 fan_control_commands = 0;
5862 fan_watchdog_maxinterval = 0;
5863 tp_features.fan_ctrl_status_undef = 0;
5864 fan_control_desired_level = 7;
5865
5866 TPACPI_ACPIHANDLE_INIT(fans);
5867 TPACPI_ACPIHANDLE_INIT(gfan);
5868 TPACPI_ACPIHANDLE_INIT(sfan);
5869
5870 if (gfan_handle) {
5871 /* 570, 600e/x, 770e, 770x */
5872 fan_status_access_mode = TPACPI_FAN_RD_ACPI_GFAN;
5873 } else {
5874 /* all other ThinkPads: note that even old-style
5875 * ThinkPad ECs supports the fan control register */
5876 if (likely(acpi_ec_read(fan_status_offset,
5877 &fan_control_initial_status))) {
5878 fan_status_access_mode = TPACPI_FAN_RD_TPEC;
5879
5880 /* In some ThinkPads, neither the EC nor the ACPI
5881 * DSDT initialize the fan status, and it ends up
5882 * being set to 0x07 when it *could* be either
5883 * 0x07 or 0x80.
5884 *
5885 * Enable for TP-1Y (T43), TP-78 (R51e),
5886 * TP-76 (R52), TP-70 (T43, R52), which are known
5887 * to be buggy. */
5888 if (fan_control_initial_status == 0x07) {
5889 switch (thinkpad_id.ec_model) {
5890 case 0x5931: /* TP-1Y */
5891 case 0x3837: /* TP-78 */
5892 case 0x3637: /* TP-76 */
5893 case 0x3037: /* TP-70 */
5894 printk(TPACPI_NOTICE
5895 "fan_init: initial fan status "
5896 "is unknown, assuming it is "
5897 "in auto mode\n");
5898 tp_features.fan_ctrl_status_undef = 1;
5899 ;;
5900 }
5901 }
5902 } else {
5903 printk(TPACPI_ERR
5904 "ThinkPad ACPI EC access misbehaving, "
5905 "fan status and control unavailable\n");
5906 return 1;
5907 }
5908 }
5909
5910 if (sfan_handle) {
5911 /* 570, 770x-JL */
5912 fan_control_access_mode = TPACPI_FAN_WR_ACPI_SFAN;
5913 fan_control_commands |=
5914 TPACPI_FAN_CMD_LEVEL | TPACPI_FAN_CMD_ENABLE;
5915 } else {
5916 if (!gfan_handle) {
5917 /* gfan without sfan means no fan control */
5918 /* all other models implement TP EC 0x2f control */
5919
5920 if (fans_handle) {
5921 /* X31, X40, X41 */
5922 fan_control_access_mode =
5923 TPACPI_FAN_WR_ACPI_FANS;
5924 fan_control_commands |=
5925 TPACPI_FAN_CMD_SPEED |
5926 TPACPI_FAN_CMD_LEVEL |
5927 TPACPI_FAN_CMD_ENABLE;
5928 } else {
5929 fan_control_access_mode = TPACPI_FAN_WR_TPEC;
5930 fan_control_commands |=
5931 TPACPI_FAN_CMD_LEVEL |
5932 TPACPI_FAN_CMD_ENABLE;
5933 }
5934 }
5935 }
5936
5937 vdbg_printk(TPACPI_DBG_INIT, "fan is %s, modes %d, %d\n",
5938 str_supported(fan_status_access_mode != TPACPI_FAN_NONE ||
5939 fan_control_access_mode != TPACPI_FAN_WR_NONE),
5940 fan_status_access_mode, fan_control_access_mode);
5941
5942 /* fan control master switch */
5943 if (!fan_control_allowed) {
5944 fan_control_access_mode = TPACPI_FAN_WR_NONE;
5945 fan_control_commands = 0;
5946 dbg_printk(TPACPI_DBG_INIT,
5947 "fan control features disabled by parameter\n");
5948 }
5949
5950 /* update fan_control_desired_level */
5951 if (fan_status_access_mode != TPACPI_FAN_NONE)
5952 fan_get_status_safe(NULL);
5953
5954 if (fan_status_access_mode != TPACPI_FAN_NONE ||
5955 fan_control_access_mode != TPACPI_FAN_WR_NONE) {
5956 rc = sysfs_create_group(&tpacpi_sensors_pdev->dev.kobj,
5957 &fan_attr_group);
5958 if (rc < 0)
5959 return rc;
5960
5961 rc = driver_create_file(&tpacpi_hwmon_pdriver.driver,
5962 &driver_attr_fan_watchdog);
5963 if (rc < 0) {
5964 sysfs_remove_group(&tpacpi_sensors_pdev->dev.kobj,
5965 &fan_attr_group);
5966 return rc;
5967 }
5968 return 0;
5969 } else
5970 return 1;
5971 }
5972
5973 static void fan_exit(void)
5974 {
5975 vdbg_printk(TPACPI_DBG_EXIT,
5976 "cancelling any pending fan watchdog tasks\n");
5977
5978 /* FIXME: can we really do this unconditionally? */
5979 sysfs_remove_group(&tpacpi_sensors_pdev->dev.kobj, &fan_attr_group);
5980 driver_remove_file(&tpacpi_hwmon_pdriver.driver,
5981 &driver_attr_fan_watchdog);
5982
5983 cancel_delayed_work(&fan_watchdog_task);
5984 flush_workqueue(tpacpi_wq);
5985 }
5986
5987 static int fan_read(char *p)
5988 {
5989 int len = 0;
5990 int rc;
5991 u8 status;
5992 unsigned int speed = 0;
5993
5994 switch (fan_status_access_mode) {
5995 case TPACPI_FAN_RD_ACPI_GFAN:
5996 /* 570, 600e/x, 770e, 770x */
5997 rc = fan_get_status_safe(&status);
5998 if (rc < 0)
5999 return rc;
6000
6001 len += sprintf(p + len, "status:\t\t%s\n"
6002 "level:\t\t%d\n",
6003 (status != 0) ? "enabled" : "disabled", status);
6004 break;
6005
6006 case TPACPI_FAN_RD_TPEC:
6007 /* all except 570, 600e/x, 770e, 770x */
6008 rc = fan_get_status_safe(&status);
6009 if (rc < 0)
6010 return rc;
6011
6012 if (unlikely(tp_features.fan_ctrl_status_undef)) {
6013 if (status != fan_control_initial_status)
6014 tp_features.fan_ctrl_status_undef = 0;
6015 else
6016 /* Return most likely status. In fact, it
6017 * might be the only possible status */
6018 status = TP_EC_FAN_AUTO;
6019 }
6020
6021 len += sprintf(p + len, "status:\t\t%s\n",
6022 (status != 0) ? "enabled" : "disabled");
6023
6024 rc = fan_get_speed(&speed);
6025 if (rc < 0)
6026 return rc;
6027
6028 len += sprintf(p + len, "speed:\t\t%d\n", speed);
6029
6030 if (status & TP_EC_FAN_FULLSPEED)
6031 /* Disengaged mode takes precedence */
6032 len += sprintf(p + len, "level:\t\tdisengaged\n");
6033 else if (status & TP_EC_FAN_AUTO)
6034 len += sprintf(p + len, "level:\t\tauto\n");
6035 else
6036 len += sprintf(p + len, "level:\t\t%d\n", status);
6037 break;
6038
6039 case TPACPI_FAN_NONE:
6040 default:
6041 len += sprintf(p + len, "status:\t\tnot supported\n");
6042 }
6043
6044 if (fan_control_commands & TPACPI_FAN_CMD_LEVEL) {
6045 len += sprintf(p + len, "commands:\tlevel <level>");
6046
6047 switch (fan_control_access_mode) {
6048 case TPACPI_FAN_WR_ACPI_SFAN:
6049 len += sprintf(p + len, " (<level> is 0-7)\n");
6050 break;
6051
6052 default:
6053 len += sprintf(p + len, " (<level> is 0-7, "
6054 "auto, disengaged, full-speed)\n");
6055 break;
6056 }
6057 }
6058
6059 if (fan_control_commands & TPACPI_FAN_CMD_ENABLE)
6060 len += sprintf(p + len, "commands:\tenable, disable\n"
6061 "commands:\twatchdog <timeout> (<timeout> "
6062 "is 0 (off), 1-120 (seconds))\n");
6063
6064 if (fan_control_commands & TPACPI_FAN_CMD_SPEED)
6065 len += sprintf(p + len, "commands:\tspeed <speed>"
6066 " (<speed> is 0-65535)\n");
6067
6068 return len;
6069 }
6070
6071 static int fan_write_cmd_level(const char *cmd, int *rc)
6072 {
6073 int level;
6074
6075 if (strlencmp(cmd, "level auto") == 0)
6076 level = TP_EC_FAN_AUTO;
6077 else if ((strlencmp(cmd, "level disengaged") == 0) |
6078 (strlencmp(cmd, "level full-speed") == 0))
6079 level = TP_EC_FAN_FULLSPEED;
6080 else if (sscanf(cmd, "level %d", &level) != 1)
6081 return 0;
6082
6083 *rc = fan_set_level_safe(level);
6084 if (*rc == -ENXIO)
6085 printk(TPACPI_ERR "level command accepted for unsupported "
6086 "access mode %d", fan_control_access_mode);
6087
6088 return 1;
6089 }
6090
6091 static int fan_write_cmd_enable(const char *cmd, int *rc)
6092 {
6093 if (strlencmp(cmd, "enable") != 0)
6094 return 0;
6095
6096 *rc = fan_set_enable();
6097 if (*rc == -ENXIO)
6098 printk(TPACPI_ERR "enable command accepted for unsupported "
6099 "access mode %d", fan_control_access_mode);
6100
6101 return 1;
6102 }
6103
6104 static int fan_write_cmd_disable(const char *cmd, int *rc)
6105 {
6106 if (strlencmp(cmd, "disable") != 0)
6107 return 0;
6108
6109 *rc = fan_set_disable();
6110 if (*rc == -ENXIO)
6111 printk(TPACPI_ERR "disable command accepted for unsupported "
6112 "access mode %d", fan_control_access_mode);
6113
6114 return 1;
6115 }
6116
6117 static int fan_write_cmd_speed(const char *cmd, int *rc)
6118 {
6119 int speed;
6120
6121 /* TODO:
6122 * Support speed <low> <medium> <high> ? */
6123
6124 if (sscanf(cmd, "speed %d", &speed) != 1)
6125 return 0;
6126
6127 *rc = fan_set_speed(speed);
6128 if (*rc == -ENXIO)
6129 printk(TPACPI_ERR "speed command accepted for unsupported "
6130 "access mode %d", fan_control_access_mode);
6131
6132 return 1;
6133 }
6134
6135 static int fan_write_cmd_watchdog(const char *cmd, int *rc)
6136 {
6137 int interval;
6138
6139 if (sscanf(cmd, "watchdog %d", &interval) != 1)
6140 return 0;
6141
6142 if (interval < 0 || interval > 120)
6143 *rc = -EINVAL;
6144 else
6145 fan_watchdog_maxinterval = interval;
6146
6147 return 1;
6148 }
6149
6150 static int fan_write(char *buf)
6151 {
6152 char *cmd;
6153 int rc = 0;
6154
6155 while (!rc && (cmd = next_cmd(&buf))) {
6156 if (!((fan_control_commands & TPACPI_FAN_CMD_LEVEL) &&
6157 fan_write_cmd_level(cmd, &rc)) &&
6158 !((fan_control_commands & TPACPI_FAN_CMD_ENABLE) &&
6159 (fan_write_cmd_enable(cmd, &rc) ||
6160 fan_write_cmd_disable(cmd, &rc) ||
6161 fan_write_cmd_watchdog(cmd, &rc))) &&
6162 !((fan_control_commands & TPACPI_FAN_CMD_SPEED) &&
6163 fan_write_cmd_speed(cmd, &rc))
6164 )
6165 rc = -EINVAL;
6166 else if (!rc)
6167 fan_watchdog_reset();
6168 }
6169
6170 return rc;
6171 }
6172
6173 static struct ibm_struct fan_driver_data = {
6174 .name = "fan",
6175 .read = fan_read,
6176 .write = fan_write,
6177 .exit = fan_exit,
6178 };
6179
6180 /****************************************************************************
6181 ****************************************************************************
6182 *
6183 * Infrastructure
6184 *
6185 ****************************************************************************
6186 ****************************************************************************/
6187
6188 /* sysfs name ---------------------------------------------------------- */
6189 static ssize_t thinkpad_acpi_pdev_name_show(struct device *dev,
6190 struct device_attribute *attr,
6191 char *buf)
6192 {
6193 return snprintf(buf, PAGE_SIZE, "%s\n", TPACPI_NAME);
6194 }
6195
6196 static struct device_attribute dev_attr_thinkpad_acpi_pdev_name =
6197 __ATTR(name, S_IRUGO, thinkpad_acpi_pdev_name_show, NULL);
6198
6199 /* --------------------------------------------------------------------- */
6200
6201 /* /proc support */
6202 static struct proc_dir_entry *proc_dir;
6203
6204 /*
6205 * Module and infrastructure proble, init and exit handling
6206 */
6207
6208 static int force_load;
6209
6210 #ifdef CONFIG_THINKPAD_ACPI_DEBUG
6211 static const char * __init str_supported(int is_supported)
6212 {
6213 static char text_unsupported[] __initdata = "not supported";
6214
6215 return (is_supported)? &text_unsupported[4] : &text_unsupported[0];
6216 }
6217 #endif /* CONFIG_THINKPAD_ACPI_DEBUG */
6218
6219 static void ibm_exit(struct ibm_struct *ibm)
6220 {
6221 dbg_printk(TPACPI_DBG_EXIT, "removing %s\n", ibm->name);
6222
6223 list_del_init(&ibm->all_drivers);
6224
6225 if (ibm->flags.acpi_notify_installed) {
6226 dbg_printk(TPACPI_DBG_EXIT,
6227 "%s: acpi_remove_notify_handler\n", ibm->name);
6228 BUG_ON(!ibm->acpi);
6229 acpi_remove_notify_handler(*ibm->acpi->handle,
6230 ibm->acpi->type,
6231 dispatch_acpi_notify);
6232 ibm->flags.acpi_notify_installed = 0;
6233 ibm->flags.acpi_notify_installed = 0;
6234 }
6235
6236 if (ibm->flags.proc_created) {
6237 dbg_printk(TPACPI_DBG_EXIT,
6238 "%s: remove_proc_entry\n", ibm->name);
6239 remove_proc_entry(ibm->name, proc_dir);
6240 ibm->flags.proc_created = 0;
6241 }
6242
6243 if (ibm->flags.acpi_driver_registered) {
6244 dbg_printk(TPACPI_DBG_EXIT,
6245 "%s: acpi_bus_unregister_driver\n", ibm->name);
6246 BUG_ON(!ibm->acpi);
6247 acpi_bus_unregister_driver(ibm->acpi->driver);
6248 kfree(ibm->acpi->driver);
6249 ibm->acpi->driver = NULL;
6250 ibm->flags.acpi_driver_registered = 0;
6251 }
6252
6253 if (ibm->flags.init_called && ibm->exit) {
6254 ibm->exit();
6255 ibm->flags.init_called = 0;
6256 }
6257
6258 dbg_printk(TPACPI_DBG_INIT, "finished removing %s\n", ibm->name);
6259 }
6260
6261 static int __init ibm_init(struct ibm_init_struct *iibm)
6262 {
6263 int ret;
6264 struct ibm_struct *ibm = iibm->data;
6265 struct proc_dir_entry *entry;
6266
6267 BUG_ON(ibm == NULL);
6268
6269 INIT_LIST_HEAD(&ibm->all_drivers);
6270
6271 if (ibm->flags.experimental && !experimental)
6272 return 0;
6273
6274 dbg_printk(TPACPI_DBG_INIT,
6275 "probing for %s\n", ibm->name);
6276
6277 if (iibm->init) {
6278 ret = iibm->init(iibm);
6279 if (ret > 0)
6280 return 0; /* probe failed */
6281 if (ret)
6282 return ret;
6283
6284 ibm->flags.init_called = 1;
6285 }
6286
6287 if (ibm->acpi) {
6288 if (ibm->acpi->hid) {
6289 ret = register_tpacpi_subdriver(ibm);
6290 if (ret)
6291 goto err_out;
6292 }
6293
6294 if (ibm->acpi->notify) {
6295 ret = setup_acpi_notify(ibm);
6296 if (ret == -ENODEV) {
6297 printk(TPACPI_NOTICE "disabling subdriver %s\n",
6298 ibm->name);
6299 ret = 0;
6300 goto err_out;
6301 }
6302 if (ret < 0)
6303 goto err_out;
6304 }
6305 }
6306
6307 dbg_printk(TPACPI_DBG_INIT,
6308 "%s installed\n", ibm->name);
6309
6310 if (ibm->read) {
6311 entry = create_proc_entry(ibm->name,
6312 S_IFREG | S_IRUGO | S_IWUSR,
6313 proc_dir);
6314 if (!entry) {
6315 printk(TPACPI_ERR "unable to create proc entry %s\n",
6316 ibm->name);
6317 ret = -ENODEV;
6318 goto err_out;
6319 }
6320 entry->owner = THIS_MODULE;
6321 entry->data = ibm;
6322 entry->read_proc = &dispatch_procfs_read;
6323 if (ibm->write)
6324 entry->write_proc = &dispatch_procfs_write;
6325 ibm->flags.proc_created = 1;
6326 }
6327
6328 list_add_tail(&ibm->all_drivers, &tpacpi_all_drivers);
6329
6330 return 0;
6331
6332 err_out:
6333 dbg_printk(TPACPI_DBG_INIT,
6334 "%s: at error exit path with result %d\n",
6335 ibm->name, ret);
6336
6337 ibm_exit(ibm);
6338 return (ret < 0)? ret : 0;
6339 }
6340
6341 /* Probing */
6342
6343 /* returns 0 - probe ok, or < 0 - probe error.
6344 * Probe ok doesn't mean thinkpad found.
6345 * On error, kfree() cleanup on tp->* is not performed, caller must do it */
6346 static int __must_check __init get_thinkpad_model_data(struct thinkpad_id_data *tp)
6347 {
6348 const struct dmi_device *dev = NULL;
6349 char ec_fw_string[18];
6350 char const *s;
6351
6352 if (!tp)
6353 return -EINVAL;
6354
6355 memset(tp, 0, sizeof(*tp));
6356
6357 if (dmi_name_in_vendors("IBM"))
6358 tp->vendor = PCI_VENDOR_ID_IBM;
6359 else if (dmi_name_in_vendors("LENOVO"))
6360 tp->vendor = PCI_VENDOR_ID_LENOVO;
6361 else
6362 return 0;
6363
6364 s = dmi_get_system_info(DMI_BIOS_VERSION);
6365 tp->bios_version_str = kstrdup(s, GFP_KERNEL);
6366 if (s && !tp->bios_version_str)
6367 return -ENOMEM;
6368 if (!tp->bios_version_str)
6369 return 0;
6370 tp->bios_model = tp->bios_version_str[0]
6371 | (tp->bios_version_str[1] << 8);
6372
6373 /*
6374 * ThinkPad T23 or newer, A31 or newer, R50e or newer,
6375 * X32 or newer, all Z series; Some models must have an
6376 * up-to-date BIOS or they will not be detected.
6377 *
6378 * See http://thinkwiki.org/wiki/List_of_DMI_IDs
6379 */
6380 while ((dev = dmi_find_device(DMI_DEV_TYPE_OEM_STRING, NULL, dev))) {
6381 if (sscanf(dev->name,
6382 "IBM ThinkPad Embedded Controller -[%17c",
6383 ec_fw_string) == 1) {
6384 ec_fw_string[sizeof(ec_fw_string) - 1] = 0;
6385 ec_fw_string[strcspn(ec_fw_string, " ]")] = 0;
6386
6387 tp->ec_version_str = kstrdup(ec_fw_string, GFP_KERNEL);
6388 if (!tp->ec_version_str)
6389 return -ENOMEM;
6390 tp->ec_model = ec_fw_string[0]
6391 | (ec_fw_string[1] << 8);
6392 break;
6393 }
6394 }
6395
6396 s = dmi_get_system_info(DMI_PRODUCT_VERSION);
6397 if (s && !strnicmp(s, "ThinkPad", 8)) {
6398 tp->model_str = kstrdup(s, GFP_KERNEL);
6399 if (!tp->model_str)
6400 return -ENOMEM;
6401 }
6402
6403 s = dmi_get_system_info(DMI_PRODUCT_NAME);
6404 tp->nummodel_str = kstrdup(s, GFP_KERNEL);
6405 if (s && !tp->nummodel_str)
6406 return -ENOMEM;
6407
6408 return 0;
6409 }
6410
6411 static int __init probe_for_thinkpad(void)
6412 {
6413 int is_thinkpad;
6414
6415 if (acpi_disabled)
6416 return -ENODEV;
6417
6418 /*
6419 * Non-ancient models have better DMI tagging, but very old models
6420 * don't.
6421 */
6422 is_thinkpad = (thinkpad_id.model_str != NULL);
6423
6424 /* ec is required because many other handles are relative to it */
6425 TPACPI_ACPIHANDLE_INIT(ec);
6426 if (!ec_handle) {
6427 if (is_thinkpad)
6428 printk(TPACPI_ERR
6429 "Not yet supported ThinkPad detected!\n");
6430 return -ENODEV;
6431 }
6432
6433 /*
6434 * Risks a regression on very old machines, but reduces potential
6435 * false positives a damn great deal
6436 */
6437 if (!is_thinkpad)
6438 is_thinkpad = (thinkpad_id.vendor == PCI_VENDOR_ID_IBM);
6439
6440 if (!is_thinkpad && !force_load)
6441 return -ENODEV;
6442
6443 return 0;
6444 }
6445
6446
6447 /* Module init, exit, parameters */
6448
6449 static struct ibm_init_struct ibms_init[] __initdata = {
6450 {
6451 .init = thinkpad_acpi_driver_init,
6452 .data = &thinkpad_acpi_driver_data,
6453 },
6454 {
6455 .init = hotkey_init,
6456 .data = &hotkey_driver_data,
6457 },
6458 {
6459 .init = bluetooth_init,
6460 .data = &bluetooth_driver_data,
6461 },
6462 {
6463 .init = wan_init,
6464 .data = &wan_driver_data,
6465 },
6466 #ifdef CONFIG_THINKPAD_ACPI_VIDEO
6467 {
6468 .init = video_init,
6469 .data = &video_driver_data,
6470 },
6471 #endif
6472 {
6473 .init = light_init,
6474 .data = &light_driver_data,
6475 },
6476 #ifdef CONFIG_THINKPAD_ACPI_DOCK
6477 {
6478 .init = dock_init,
6479 .data = &dock_driver_data[0],
6480 },
6481 {
6482 .init = dock_init2,
6483 .data = &dock_driver_data[1],
6484 },
6485 #endif
6486 #ifdef CONFIG_THINKPAD_ACPI_BAY
6487 {
6488 .init = bay_init,
6489 .data = &bay_driver_data,
6490 },
6491 #endif
6492 {
6493 .init = cmos_init,
6494 .data = &cmos_driver_data,
6495 },
6496 {
6497 .init = led_init,
6498 .data = &led_driver_data,
6499 },
6500 {
6501 .init = beep_init,
6502 .data = &beep_driver_data,
6503 },
6504 {
6505 .init = thermal_init,
6506 .data = &thermal_driver_data,
6507 },
6508 {
6509 .data = &ecdump_driver_data,
6510 },
6511 {
6512 .init = brightness_init,
6513 .data = &brightness_driver_data,
6514 },
6515 {
6516 .data = &volume_driver_data,
6517 },
6518 {
6519 .init = fan_init,
6520 .data = &fan_driver_data,
6521 },
6522 };
6523
6524 static int __init set_ibm_param(const char *val, struct kernel_param *kp)
6525 {
6526 unsigned int i;
6527 struct ibm_struct *ibm;
6528
6529 if (!kp || !kp->name || !val)
6530 return -EINVAL;
6531
6532 for (i = 0; i < ARRAY_SIZE(ibms_init); i++) {
6533 ibm = ibms_init[i].data;
6534 WARN_ON(ibm == NULL);
6535
6536 if (!ibm || !ibm->name)
6537 continue;
6538
6539 if (strcmp(ibm->name, kp->name) == 0 && ibm->write) {
6540 if (strlen(val) > sizeof(ibms_init[i].param) - 2)
6541 return -ENOSPC;
6542 strcpy(ibms_init[i].param, val);
6543 strcat(ibms_init[i].param, ",");
6544 return 0;
6545 }
6546 }
6547
6548 return -EINVAL;
6549 }
6550
6551 module_param(experimental, int, 0);
6552 MODULE_PARM_DESC(experimental,
6553 "Enables experimental features when non-zero");
6554
6555 module_param_named(debug, dbg_level, uint, 0);
6556 MODULE_PARM_DESC(debug, "Sets debug level bit-mask");
6557
6558 module_param(force_load, bool, 0);
6559 MODULE_PARM_DESC(force_load,
6560 "Attempts to load the driver even on a "
6561 "mis-identified ThinkPad when true");
6562
6563 module_param_named(fan_control, fan_control_allowed, bool, 0);
6564 MODULE_PARM_DESC(fan_control,
6565 "Enables setting fan parameters features when true");
6566
6567 module_param_named(brightness_mode, brightness_mode, int, 0);
6568 MODULE_PARM_DESC(brightness_mode,
6569 "Selects brightness control strategy: "
6570 "0=auto, 1=EC, 2=CMOS, 3=both");
6571
6572 module_param(brightness_enable, uint, 0);
6573 MODULE_PARM_DESC(brightness_enable,
6574 "Enables backlight control when 1, disables when 0");
6575
6576 module_param(hotkey_report_mode, uint, 0);
6577 MODULE_PARM_DESC(hotkey_report_mode,
6578 "used for backwards compatibility with userspace, "
6579 "see documentation");
6580
6581 #define TPACPI_PARAM(feature) \
6582 module_param_call(feature, set_ibm_param, NULL, NULL, 0); \
6583 MODULE_PARM_DESC(feature, "Simulates thinkpad-acpi procfs command " \
6584 "at module load, see documentation")
6585
6586 TPACPI_PARAM(hotkey);
6587 TPACPI_PARAM(bluetooth);
6588 TPACPI_PARAM(video);
6589 TPACPI_PARAM(light);
6590 #ifdef CONFIG_THINKPAD_ACPI_DOCK
6591 TPACPI_PARAM(dock);
6592 #endif
6593 #ifdef CONFIG_THINKPAD_ACPI_BAY
6594 TPACPI_PARAM(bay);
6595 #endif /* CONFIG_THINKPAD_ACPI_BAY */
6596 TPACPI_PARAM(cmos);
6597 TPACPI_PARAM(led);
6598 TPACPI_PARAM(beep);
6599 TPACPI_PARAM(ecdump);
6600 TPACPI_PARAM(brightness);
6601 TPACPI_PARAM(volume);
6602 TPACPI_PARAM(fan);
6603
6604 static void thinkpad_acpi_module_exit(void)
6605 {
6606 struct ibm_struct *ibm, *itmp;
6607
6608 tpacpi_lifecycle = TPACPI_LIFE_EXITING;
6609
6610 list_for_each_entry_safe_reverse(ibm, itmp,
6611 &tpacpi_all_drivers,
6612 all_drivers) {
6613 ibm_exit(ibm);
6614 }
6615
6616 dbg_printk(TPACPI_DBG_INIT, "finished subdriver exit path...\n");
6617
6618 if (tpacpi_inputdev) {
6619 if (tp_features.input_device_registered)
6620 input_unregister_device(tpacpi_inputdev);
6621 else
6622 input_free_device(tpacpi_inputdev);
6623 }
6624
6625 if (tpacpi_hwmon)
6626 hwmon_device_unregister(tpacpi_hwmon);
6627
6628 if (tp_features.sensors_pdev_attrs_registered)
6629 device_remove_file(&tpacpi_sensors_pdev->dev,
6630 &dev_attr_thinkpad_acpi_pdev_name);
6631 if (tpacpi_sensors_pdev)
6632 platform_device_unregister(tpacpi_sensors_pdev);
6633 if (tpacpi_pdev)
6634 platform_device_unregister(tpacpi_pdev);
6635
6636 if (tp_features.sensors_pdrv_attrs_registered)
6637 tpacpi_remove_driver_attributes(&tpacpi_hwmon_pdriver.driver);
6638 if (tp_features.platform_drv_attrs_registered)
6639 tpacpi_remove_driver_attributes(&tpacpi_pdriver.driver);
6640
6641 if (tp_features.sensors_pdrv_registered)
6642 platform_driver_unregister(&tpacpi_hwmon_pdriver);
6643
6644 if (tp_features.platform_drv_registered)
6645 platform_driver_unregister(&tpacpi_pdriver);
6646
6647 if (proc_dir)
6648 remove_proc_entry(TPACPI_PROC_DIR, acpi_root_dir);
6649
6650 if (tpacpi_wq)
6651 destroy_workqueue(tpacpi_wq);
6652
6653 kfree(thinkpad_id.bios_version_str);
6654 kfree(thinkpad_id.ec_version_str);
6655 kfree(thinkpad_id.model_str);
6656 }
6657
6658
6659 static int __init thinkpad_acpi_module_init(void)
6660 {
6661 int ret, i;
6662
6663 tpacpi_lifecycle = TPACPI_LIFE_INIT;
6664
6665 /* Parameter checking */
6666 if (hotkey_report_mode > 2)
6667 return -EINVAL;
6668
6669 /* Driver-level probe */
6670
6671 ret = get_thinkpad_model_data(&thinkpad_id);
6672 if (ret) {
6673 printk(TPACPI_ERR
6674 "unable to get DMI data: %d\n", ret);
6675 thinkpad_acpi_module_exit();
6676 return ret;
6677 }
6678 ret = probe_for_thinkpad();
6679 if (ret) {
6680 thinkpad_acpi_module_exit();
6681 return ret;
6682 }
6683
6684 /* Driver initialization */
6685
6686 TPACPI_ACPIHANDLE_INIT(ecrd);
6687 TPACPI_ACPIHANDLE_INIT(ecwr);
6688
6689 tpacpi_wq = create_singlethread_workqueue(TPACPI_WORKQUEUE_NAME);
6690 if (!tpacpi_wq) {
6691 thinkpad_acpi_module_exit();
6692 return -ENOMEM;
6693 }
6694
6695 proc_dir = proc_mkdir(TPACPI_PROC_DIR, acpi_root_dir);
6696 if (!proc_dir) {
6697 printk(TPACPI_ERR
6698 "unable to create proc dir " TPACPI_PROC_DIR);
6699 thinkpad_acpi_module_exit();
6700 return -ENODEV;
6701 }
6702 proc_dir->owner = THIS_MODULE;
6703
6704 ret = platform_driver_register(&tpacpi_pdriver);
6705 if (ret) {
6706 printk(TPACPI_ERR
6707 "unable to register main platform driver\n");
6708 thinkpad_acpi_module_exit();
6709 return ret;
6710 }
6711 tp_features.platform_drv_registered = 1;
6712
6713 ret = platform_driver_register(&tpacpi_hwmon_pdriver);
6714 if (ret) {
6715 printk(TPACPI_ERR
6716 "unable to register hwmon platform driver\n");
6717 thinkpad_acpi_module_exit();
6718 return ret;
6719 }
6720 tp_features.sensors_pdrv_registered = 1;
6721
6722 ret = tpacpi_create_driver_attributes(&tpacpi_pdriver.driver);
6723 if (!ret) {
6724 tp_features.platform_drv_attrs_registered = 1;
6725 ret = tpacpi_create_driver_attributes(
6726 &tpacpi_hwmon_pdriver.driver);
6727 }
6728 if (ret) {
6729 printk(TPACPI_ERR
6730 "unable to create sysfs driver attributes\n");
6731 thinkpad_acpi_module_exit();
6732 return ret;
6733 }
6734 tp_features.sensors_pdrv_attrs_registered = 1;
6735
6736
6737 /* Device initialization */
6738 tpacpi_pdev = platform_device_register_simple(TPACPI_DRVR_NAME, -1,
6739 NULL, 0);
6740 if (IS_ERR(tpacpi_pdev)) {
6741 ret = PTR_ERR(tpacpi_pdev);
6742 tpacpi_pdev = NULL;
6743 printk(TPACPI_ERR "unable to register platform device\n");
6744 thinkpad_acpi_module_exit();
6745 return ret;
6746 }
6747 tpacpi_sensors_pdev = platform_device_register_simple(
6748 TPACPI_HWMON_DRVR_NAME,
6749 -1, NULL, 0);
6750 if (IS_ERR(tpacpi_sensors_pdev)) {
6751 ret = PTR_ERR(tpacpi_sensors_pdev);
6752 tpacpi_sensors_pdev = NULL;
6753 printk(TPACPI_ERR
6754 "unable to register hwmon platform device\n");
6755 thinkpad_acpi_module_exit();
6756 return ret;
6757 }
6758 ret = device_create_file(&tpacpi_sensors_pdev->dev,
6759 &dev_attr_thinkpad_acpi_pdev_name);
6760 if (ret) {
6761 printk(TPACPI_ERR
6762 "unable to create sysfs hwmon device attributes\n");
6763 thinkpad_acpi_module_exit();
6764 return ret;
6765 }
6766 tp_features.sensors_pdev_attrs_registered = 1;
6767 tpacpi_hwmon = hwmon_device_register(&tpacpi_sensors_pdev->dev);
6768 if (IS_ERR(tpacpi_hwmon)) {
6769 ret = PTR_ERR(tpacpi_hwmon);
6770 tpacpi_hwmon = NULL;
6771 printk(TPACPI_ERR "unable to register hwmon device\n");
6772 thinkpad_acpi_module_exit();
6773 return ret;
6774 }
6775 mutex_init(&tpacpi_inputdev_send_mutex);
6776 tpacpi_inputdev = input_allocate_device();
6777 if (!tpacpi_inputdev) {
6778 printk(TPACPI_ERR "unable to allocate input device\n");
6779 thinkpad_acpi_module_exit();
6780 return -ENOMEM;
6781 } else {
6782 /* Prepare input device, but don't register */
6783 tpacpi_inputdev->name = "ThinkPad Extra Buttons";
6784 tpacpi_inputdev->phys = TPACPI_DRVR_NAME "/input0";
6785 tpacpi_inputdev->id.bustype = BUS_HOST;
6786 tpacpi_inputdev->id.vendor = (thinkpad_id.vendor) ?
6787 thinkpad_id.vendor :
6788 PCI_VENDOR_ID_IBM;
6789 tpacpi_inputdev->id.product = TPACPI_HKEY_INPUT_PRODUCT;
6790 tpacpi_inputdev->id.version = TPACPI_HKEY_INPUT_VERSION;
6791 }
6792 for (i = 0; i < ARRAY_SIZE(ibms_init); i++) {
6793 ret = ibm_init(&ibms_init[i]);
6794 if (ret >= 0 && *ibms_init[i].param)
6795 ret = ibms_init[i].data->write(ibms_init[i].param);
6796 if (ret < 0) {
6797 thinkpad_acpi_module_exit();
6798 return ret;
6799 }
6800 }
6801 ret = input_register_device(tpacpi_inputdev);
6802 if (ret < 0) {
6803 printk(TPACPI_ERR "unable to register input device\n");
6804 thinkpad_acpi_module_exit();
6805 return ret;
6806 } else {
6807 tp_features.input_device_registered = 1;
6808 }
6809
6810 tpacpi_lifecycle = TPACPI_LIFE_RUNNING;
6811 return 0;
6812 }
6813
6814 /* Please remove this in year 2009 */
6815 MODULE_ALIAS("ibm_acpi");
6816
6817 MODULE_ALIAS(TPACPI_DRVR_SHORTNAME);
6818
6819 /*
6820 * DMI matching for module autoloading
6821 *
6822 * See http://thinkwiki.org/wiki/List_of_DMI_IDs
6823 * See http://thinkwiki.org/wiki/BIOS_Upgrade_Downloads
6824 *
6825 * Only models listed in thinkwiki will be supported, so add yours
6826 * if it is not there yet.
6827 */
6828 #define IBM_BIOS_MODULE_ALIAS(__type) \
6829 MODULE_ALIAS("dmi:bvnIBM:bvr" __type "ET??WW")
6830
6831 /* Non-ancient thinkpads */
6832 MODULE_ALIAS("dmi:bvnIBM:*:svnIBM:*:pvrThinkPad*:rvnIBM:*");
6833 MODULE_ALIAS("dmi:bvnLENOVO:*:svnLENOVO:*:pvrThinkPad*:rvnLENOVO:*");
6834
6835 /* Ancient thinkpad BIOSes have to be identified by
6836 * BIOS type or model number, and there are far less
6837 * BIOS types than model numbers... */
6838 IBM_BIOS_MODULE_ALIAS("I[B,D,H,I,M,N,O,T,W,V,Y,Z]");
6839 IBM_BIOS_MODULE_ALIAS("1[0,3,6,8,A-G,I,K,M-P,S,T]");
6840 IBM_BIOS_MODULE_ALIAS("K[U,X-Z]");
6841
6842 MODULE_AUTHOR("Borislav Deianov, Henrique de Moraes Holschuh");
6843 MODULE_DESCRIPTION(TPACPI_DESC);
6844 MODULE_VERSION(TPACPI_VERSION);
6845 MODULE_LICENSE("GPL");
6846
6847 module_init(thinkpad_acpi_module_init);
6848 module_exit(thinkpad_acpi_module_exit);
Linux 2.6 ibm-acpi/thinkpad-acpi driver git tree