?  search:
summary | log | graphiclog1 | graphiclog2 | commit | commitdiff | tree | refs | edit | fork
blame | history | raw | HEAD
ACPI: thinkpad-acpi: claim tpacpi as an official short handle (v1.1)
[linux-2.6/linux-acpi-2.6/ibm-acpi-2.6.git] / drivers / misc / thinkpad_acpi.c
blob001e9a727721bf7cfe2f846385989d7403ce4a03
1 /*
2 * thinkpad_acpi.c - ThinkPad ACPI Extras
3 *
4 *
5 * Copyright (C) 2004-2005 Borislav Deianov <borislav@users.sf.net>
6 * Copyright (C) 2006-2008 Henrique de Moraes Holschuh <hmh@hmh.eng.br>
7 *
8 * This program is free software; you can redistribute it and/or modify
9 * it under the terms of the GNU General Public License as published by
10 * the Free Software Foundation; either version 2 of the License, or
11 * (at your option) any later version.
12 *
13 * This program is distributed in the hope that it will be useful,
14 * but WITHOUT ANY WARRANTY; without even the implied warranty of
15 * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
16 * GNU General Public License for more details.
17 *
18 * You should have received a copy of the GNU General Public License
19 * along with this program; if not, write to the Free Software
20 * Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA
21 * 02110-1301, USA.
22 */
23
24 #define TPACPI_VERSION "0.19"
25 #define TPACPI_SYSFS_VERSION 0x020200
26
27 /*
28 * Changelog:
29 * 2007-10-20 changelog trimmed down
30 *
31 * 2007-03-27 0.14 renamed to thinkpad_acpi and moved to
32 * drivers/misc.
33 *
34 * 2006-11-22 0.13 new maintainer
35 * changelog now lives in git commit history, and will
36 * not be updated further in-file.
37 *
38 * 2005-03-17 0.11 support for 600e, 770x
39 * thanks to Jamie Lentin <lentinj@dial.pipex.com>
40 *
41 * 2005-01-16 0.9 use MODULE_VERSION
42 * thanks to Henrik Brix Andersen <brix@gentoo.org>
43 * fix parameter passing on module loading
44 * thanks to Rusty Russell <rusty@rustcorp.com.au>
45 * thanks to Jim Radford <radford@blackbean.org>
46 * 2004-11-08 0.8 fix init error case, don't return from a macro
47 * thanks to Chris Wright <chrisw@osdl.org>
48 */
49
50 #include <linux/kernel.h>
51 #include <linux/module.h>
52 #include <linux/init.h>
53 #include <linux/types.h>
54 #include <linux/string.h>
55 #include <linux/list.h>
56 #include <linux/mutex.h>
57 #include <linux/kthread.h>
58 #include <linux/freezer.h>
59 #include <linux/delay.h>
60
61 #include <linux/nvram.h>
62 #include <linux/proc_fs.h>
63 #include <linux/sysfs.h>
64 #include <linux/backlight.h>
65 #include <linux/fb.h>
66 #include <linux/platform_device.h>
67 #include <linux/hwmon.h>
68 #include <linux/hwmon-sysfs.h>
69 #include <linux/input.h>
70 #include <asm/uaccess.h>
71
72 #include <linux/dmi.h>
73 #include <linux/jiffies.h>
74 #include <linux/workqueue.h>
75
76 #include <acpi/acpi_drivers.h>
77 #include <acpi/acnamesp.h>
78
79 #include <linux/pci_ids.h>
80
81
82 /* ThinkPad CMOS commands */
83 #define TP_CMOS_VOLUME_DOWN 0
84 #define TP_CMOS_VOLUME_UP 1
85 #define TP_CMOS_VOLUME_MUTE 2
86 #define TP_CMOS_BRIGHTNESS_UP 4
87 #define TP_CMOS_BRIGHTNESS_DOWN 5
88
89 /* NVRAM Addresses */
90 enum tp_nvram_addr {
91 TP_NVRAM_ADDR_HK2 = 0x57,
92 TP_NVRAM_ADDR_THINKLIGHT = 0x58,
93 TP_NVRAM_ADDR_VIDEO = 0x59,
94 TP_NVRAM_ADDR_BRIGHTNESS = 0x5e,
95 TP_NVRAM_ADDR_MIXER = 0x60,
96 };
97
98 /* NVRAM bit masks */
99 enum {
100 TP_NVRAM_MASK_HKT_THINKPAD = 0x08,
101 TP_NVRAM_MASK_HKT_ZOOM = 0x20,
102 TP_NVRAM_MASK_HKT_DISPLAY = 0x40,
103 TP_NVRAM_MASK_HKT_HIBERNATE = 0x80,
104 TP_NVRAM_MASK_THINKLIGHT = 0x10,
105 TP_NVRAM_MASK_HKT_DISPEXPND = 0x30,
106 TP_NVRAM_MASK_HKT_BRIGHTNESS = 0x20,
107 TP_NVRAM_MASK_LEVEL_BRIGHTNESS = 0x0f,
108 TP_NVRAM_POS_LEVEL_BRIGHTNESS = 0,
109 TP_NVRAM_MASK_MUTE = 0x40,
110 TP_NVRAM_MASK_HKT_VOLUME = 0x80,
111 TP_NVRAM_MASK_LEVEL_VOLUME = 0x0f,
112 TP_NVRAM_POS_LEVEL_VOLUME = 0,
113 };
114
115 /* ACPI HIDs */
116 #define TPACPI_ACPI_HKEY_HID "IBM0068"
117
118 /* Input IDs */
119 #define TPACPI_HKEY_INPUT_PRODUCT 0x5054 /* "TP" */
120 #define TPACPI_HKEY_INPUT_VERSION 0x4101
121
122
123 /****************************************************************************
124 * Main driver
125 */
126
127 #define TPACPI_NAME "thinkpad"
128 #define TPACPI_DESC "ThinkPad ACPI Extras"
129 #define TPACPI_FILE TPACPI_NAME "_acpi"
130 #define TPACPI_URL "http://ibm-acpi.sf.net/"
131 #define TPACPI_MAIL "ibm-acpi-devel@lists.sourceforge.net"
132
133 #define TPACPI_PROC_DIR "ibm"
134 #define TPACPI_ACPI_EVENT_PREFIX "ibm"
135 #define TPACPI_DRVR_NAME TPACPI_FILE
136 #define TPACPI_DRVR_SHORTNAME "tpacpi"
137 #define TPACPI_HWMON_DRVR_NAME TPACPI_NAME "_hwmon"
138
139 #define TPACPI_NVRAM_KTHREAD_NAME "ktpacpi_nvramd"
140
141 #define TPACPI_MAX_ACPI_ARGS 3
142
143 /* Debugging */
144 #define TPACPI_LOG TPACPI_FILE ": "
145 #define TPACPI_ERR KERN_ERR TPACPI_LOG
146 #define TPACPI_NOTICE KERN_NOTICE TPACPI_LOG
147 #define TPACPI_INFO KERN_INFO TPACPI_LOG
148 #define TPACPI_DEBUG KERN_DEBUG TPACPI_LOG
149
150 #define TPACPI_DBG_ALL 0xffff
151 #define TPACPI_DBG_ALL 0xffff
152 #define TPACPI_DBG_INIT 0x0001
153 #define TPACPI_DBG_EXIT 0x0002
154 #define dbg_printk(a_dbg_level, format, arg...) \
155 do { if (dbg_level & a_dbg_level) \
156 printk(TPACPI_DEBUG "%s: " format, __func__ , ## arg); \
157 } while (0)
158 #ifdef CONFIG_THINKPAD_ACPI_DEBUG
159 #define vdbg_printk(a_dbg_level, format, arg...) \
160 dbg_printk(a_dbg_level, format, ## arg)
161 static const char *str_supported(int is_supported);
162 #else
163 #define vdbg_printk(a_dbg_level, format, arg...)
164 #endif
165
166 #define onoff(status, bit) ((status) & (1 << (bit)) ? "on" : "off")
167 #define enabled(status, bit) ((status) & (1 << (bit)) ? "enabled" : "disabled")
168 #define strlencmp(a, b) (strncmp((a), (b), strlen(b)))
169
170
171 /****************************************************************************
172 * Driver-wide structs and misc. variables
173 */
174
175 struct ibm_struct;
176
177 struct tp_acpi_drv_struct {
178 const struct acpi_device_id *hid;
179 struct acpi_driver *driver;
180
181 void (*notify) (struct ibm_struct *, u32);
182 acpi_handle *handle;
183 u32 type;
184 struct acpi_device *device;
185 };
186
187 struct ibm_struct {
188 char *name;
189
190 int (*read) (char *);
191 int (*write) (char *);
192 void (*exit) (void);
193 void (*resume) (void);
194 void (*suspend) (pm_message_t state);
195
196 struct list_head all_drivers;
197
198 struct tp_acpi_drv_struct *acpi;
199
200 struct {
201 u8 acpi_driver_registered:1;
202 u8 acpi_notify_installed:1;
203 u8 proc_created:1;
204 u8 init_called:1;
205 u8 experimental:1;
206 } flags;
207 };
208
209 struct ibm_init_struct {
210 char param[32];
211
212 int (*init) (struct ibm_init_struct *);
213 struct ibm_struct *data;
214 };
215
216 static struct {
217 #ifdef CONFIG_THINKPAD_ACPI_BAY
218 u32 bay_status:1;
219 u32 bay_eject:1;
220 u32 bay_status2:1;
221 u32 bay_eject2:1;
222 #endif
223 u32 bluetooth:1;
224 u32 hotkey:1;
225 u32 hotkey_mask:1;
226 u32 hotkey_wlsw:1;
227 u32 hotkey_tablet:1;
228 u32 light:1;
229 u32 light_status:1;
230 u32 bright_16levels:1;
231 u32 bright_acpimode:1;
232 u32 wan:1;
233 u32 fan_ctrl_status_undef:1;
234 u32 input_device_registered:1;
235 u32 platform_drv_registered:1;
236 u32 platform_drv_attrs_registered:1;
237 u32 sensors_pdrv_registered:1;
238 u32 sensors_pdrv_attrs_registered:1;
239 u32 sensors_pdev_attrs_registered:1;
240 u32 hotkey_poll_active:1;
241 } tp_features;
242
243 static struct {
244 u16 hotkey_mask_ff:1;
245 u16 bright_cmos_ec_unsync:1;
246 } tp_warned;
247
248 struct thinkpad_id_data {
249 unsigned int vendor; /* ThinkPad vendor:
250 * PCI_VENDOR_ID_IBM/PCI_VENDOR_ID_LENOVO */
251
252 char *bios_version_str; /* Something like 1ZET51WW (1.03z) */
253 char *ec_version_str; /* Something like 1ZHT51WW-1.04a */
254
255 u16 bios_model; /* Big Endian, TP-1Y = 0x5931, 0 = unknown */
256 u16 ec_model;
257
258 char *model_str; /* ThinkPad T43 */
259 char *nummodel_str; /* 9384A9C for a 9384-A9C model */
260 };
261 static struct thinkpad_id_data thinkpad_id;
262
263 static enum {
264 TPACPI_LIFE_INIT = 0,
265 TPACPI_LIFE_RUNNING,
266 TPACPI_LIFE_EXITING,
267 } tpacpi_lifecycle;
268
269 static int experimental;
270 static u32 dbg_level;
271
272 /****************************************************************************
273 ****************************************************************************
274 *
275 * ACPI Helpers and device model
276 *
277 ****************************************************************************
278 ****************************************************************************/
279
280 /*************************************************************************
281 * ACPI basic handles
282 */
283
284 static acpi_handle root_handle;
285
286 #define TPACPI_HANDLE(object, parent, paths...) \
287 static acpi_handle object##_handle; \
288 static acpi_handle *object##_parent = &parent##_handle; \
289 static char *object##_path; \
290 static char *object##_paths[] = { paths }
291
292 TPACPI_HANDLE(ec, root, "\\_SB.PCI0.ISA.EC0", /* 240, 240x */
293 "\\_SB.PCI.ISA.EC", /* 570 */
294 "\\_SB.PCI0.ISA0.EC0", /* 600e/x, 770e, 770x */
295 "\\_SB.PCI0.ISA.EC", /* A21e, A2xm/p, T20-22, X20-21 */
296 "\\_SB.PCI0.AD4S.EC0", /* i1400, R30 */
297 "\\_SB.PCI0.ICH3.EC0", /* R31 */
298 "\\_SB.PCI0.LPC.EC", /* all others */
299 );
300
301 TPACPI_HANDLE(ecrd, ec, "ECRD"); /* 570 */
302 TPACPI_HANDLE(ecwr, ec, "ECWR"); /* 570 */
303
304 TPACPI_HANDLE(cmos, root, "\\UCMS", /* R50, R50e, R50p, R51, */
305 /* T4x, X31, X40 */
306 "\\CMOS", /* A3x, G4x, R32, T23, T30, X22-24, X30 */
307 "\\CMS", /* R40, R40e */
308 ); /* all others */
309
310 TPACPI_HANDLE(hkey, ec, "\\_SB.HKEY", /* 600e/x, 770e, 770x */
311 "^HKEY", /* R30, R31 */
312 "HKEY", /* all others */
313 ); /* 570 */
314
315 TPACPI_HANDLE(vid, root, "\\_SB.PCI.AGP.VGA", /* 570 */
316 "\\_SB.PCI0.AGP0.VID0", /* 600e/x, 770x */
317 "\\_SB.PCI0.VID0", /* 770e */
318 "\\_SB.PCI0.VID", /* A21e, G4x, R50e, X30, X40 */
319 "\\_SB.PCI0.AGP.VID", /* all others */
320 ); /* R30, R31 */
321
322
323 /*************************************************************************
324 * ACPI helpers
325 */
326
327 static int acpi_evalf(acpi_handle handle,
328 void *res, char *method, char *fmt, ...)
329 {
330 char *fmt0 = fmt;
331 struct acpi_object_list params;
332 union acpi_object in_objs[TPACPI_MAX_ACPI_ARGS];
333 struct acpi_buffer result, *resultp;
334 union acpi_object out_obj;
335 acpi_status status;
336 va_list ap;
337 char res_type;
338 int success;
339 int quiet;
340
341 if (!*fmt) {
342 printk(TPACPI_ERR "acpi_evalf() called with empty format\n");
343 return 0;
344 }
345
346 if (*fmt == 'q') {
347 quiet = 1;
348 fmt++;
349 } else
350 quiet = 0;
351
352 res_type = *(fmt++);
353
354 params.count = 0;
355 params.pointer = &in_objs[0];
356
357 va_start(ap, fmt);
358 while (*fmt) {
359 char c = *(fmt++);
360 switch (c) {
361 case 'd': /* int */
362 in_objs[params.count].integer.value = va_arg(ap, int);
363 in_objs[params.count++].type = ACPI_TYPE_INTEGER;
364 break;
365 /* add more types as needed */
366 default:
367 printk(TPACPI_ERR "acpi_evalf() called "
368 "with invalid format character '%c'\n", c);
369 return 0;
370 }
371 }
372 va_end(ap);
373
374 if (res_type != 'v') {
375 result.length = sizeof(out_obj);
376 result.pointer = &out_obj;
377 resultp = &result;
378 } else
379 resultp = NULL;
380
381 status = acpi_evaluate_object(handle, method, &params, resultp);
382
383 switch (res_type) {
384 case 'd': /* int */
385 if (res)
386 *(int *)res = out_obj.integer.value;
387 success = status == AE_OK && out_obj.type == ACPI_TYPE_INTEGER;
388 break;
389 case 'v': /* void */
390 success = status == AE_OK;
391 break;
392 /* add more types as needed */
393 default:
394 printk(TPACPI_ERR "acpi_evalf() called "
395 "with invalid format character '%c'\n", res_type);
396 return 0;
397 }
398
399 if (!success && !quiet)
400 printk(TPACPI_ERR "acpi_evalf(%s, %s, ...) failed: %d\n",
401 method, fmt0, status);
402
403 return success;
404 }
405
406 static int acpi_ec_read(int i, u8 *p)
407 {
408 int v;
409
410 if (ecrd_handle) {
411 if (!acpi_evalf(ecrd_handle, &v, NULL, "dd", i))
412 return 0;
413 *p = v;
414 } else {
415 if (ec_read(i, p) < 0)
416 return 0;
417 }
418
419 return 1;
420 }
421
422 static int acpi_ec_write(int i, u8 v)
423 {
424 if (ecwr_handle) {
425 if (!acpi_evalf(ecwr_handle, NULL, NULL, "vdd", i, v))
426 return 0;
427 } else {
428 if (ec_write(i, v) < 0)
429 return 0;
430 }
431
432 return 1;
433 }
434
435 #if defined(CONFIG_THINKPAD_ACPI_DOCK) || defined(CONFIG_THINKPAD_ACPI_BAY)
436 static int _sta(acpi_handle handle)
437 {
438 int status;
439
440 if (!handle || !acpi_evalf(handle, &status, "_STA", "d"))
441 status = 0;
442
443 return status;
444 }
445 #endif
446
447 static int issue_thinkpad_cmos_command(int cmos_cmd)
448 {
449 if (!cmos_handle)
450 return -ENXIO;
451
452 if (!acpi_evalf(cmos_handle, NULL, NULL, "vd", cmos_cmd))
453 return -EIO;
454
455 return 0;
456 }
457
458 /*************************************************************************
459 * ACPI device model
460 */
461
462 #define TPACPI_ACPIHANDLE_INIT(object) \
463 drv_acpi_handle_init(#object, &object##_handle, *object##_parent, \
464 object##_paths, ARRAY_SIZE(object##_paths), &object##_path)
465
466 static void drv_acpi_handle_init(char *name,
467 acpi_handle *handle, acpi_handle parent,
468 char **paths, int num_paths, char **path)
469 {
470 int i;
471 acpi_status status;
472
473 vdbg_printk(TPACPI_DBG_INIT, "trying to locate ACPI handle for %s\n",
474 name);
475
476 for (i = 0; i < num_paths; i++) {
477 status = acpi_get_handle(parent, paths[i], handle);
478 if (ACPI_SUCCESS(status)) {
479 *path = paths[i];
480 dbg_printk(TPACPI_DBG_INIT,
481 "Found ACPI handle %s for %s\n",
482 *path, name);
483 return;
484 }
485 }
486
487 vdbg_printk(TPACPI_DBG_INIT, "ACPI handle for %s not found\n",
488 name);
489 *handle = NULL;
490 }
491
492 static void dispatch_acpi_notify(acpi_handle handle, u32 event, void *data)
493 {
494 struct ibm_struct *ibm = data;
495
496 if (tpacpi_lifecycle != TPACPI_LIFE_RUNNING)
497 return;
498
499 if (!ibm || !ibm->acpi || !ibm->acpi->notify)
500 return;
501
502 ibm->acpi->notify(ibm, event);
503 }
504
505 static int __init setup_acpi_notify(struct ibm_struct *ibm)
506 {
507 acpi_status status;
508 int rc;
509
510 BUG_ON(!ibm->acpi);
511
512 if (!*ibm->acpi->handle)
513 return 0;
514
515 vdbg_printk(TPACPI_DBG_INIT,
516 "setting up ACPI notify for %s\n", ibm->name);
517
518 rc = acpi_bus_get_device(*ibm->acpi->handle, &ibm->acpi->device);
519 if (rc < 0) {
520 printk(TPACPI_ERR "acpi_bus_get_device(%s) failed: %d\n",
521 ibm->name, rc);
522 return -ENODEV;
523 }
524
525 acpi_driver_data(ibm->acpi->device) = ibm;
526 sprintf(acpi_device_class(ibm->acpi->device), "%s/%s",
527 TPACPI_ACPI_EVENT_PREFIX,
528 ibm->name);
529
530 status = acpi_install_notify_handler(*ibm->acpi->handle,
531 ibm->acpi->type, dispatch_acpi_notify, ibm);
532 if (ACPI_FAILURE(status)) {
533 if (status == AE_ALREADY_EXISTS) {
534 printk(TPACPI_NOTICE
535 "another device driver is already "
536 "handling %s events\n", ibm->name);
537 } else {
538 printk(TPACPI_ERR
539 "acpi_install_notify_handler(%s) failed: %d\n",
540 ibm->name, status);
541 }
542 return -ENODEV;
543 }
544 ibm->flags.acpi_notify_installed = 1;
545 return 0;
546 }
547
548 static int __init tpacpi_device_add(struct acpi_device *device)
549 {
550 return 0;
551 }
552
553 static int __init register_tpacpi_subdriver(struct ibm_struct *ibm)
554 {
555 int rc;
556
557 dbg_printk(TPACPI_DBG_INIT,
558 "registering %s as an ACPI driver\n", ibm->name);
559
560 BUG_ON(!ibm->acpi);
561
562 ibm->acpi->driver = kzalloc(sizeof(struct acpi_driver), GFP_KERNEL);
563 if (!ibm->acpi->driver) {
564 printk(TPACPI_ERR "kzalloc(ibm->driver) failed\n");
565 return -ENOMEM;
566 }
567
568 sprintf(ibm->acpi->driver->name, "%s_%s", TPACPI_NAME, ibm->name);
569 ibm->acpi->driver->ids = ibm->acpi->hid;
570
571 ibm->acpi->driver->ops.add = &tpacpi_device_add;
572
573 rc = acpi_bus_register_driver(ibm->acpi->driver);
574 if (rc < 0) {
575 printk(TPACPI_ERR "acpi_bus_register_driver(%s) failed: %d\n",
576 ibm->name, rc);
577 kfree(ibm->acpi->driver);
578 ibm->acpi->driver = NULL;
579 } else if (!rc)
580 ibm->flags.acpi_driver_registered = 1;
581
582 return rc;
583 }
584
585
586 /****************************************************************************
587 ****************************************************************************
588 *
589 * Procfs Helpers
590 *
591 ****************************************************************************
592 ****************************************************************************/
593
594 static int dispatch_procfs_read(char *page, char **start, off_t off,
595 int count, int *eof, void *data)
596 {
597 struct ibm_struct *ibm = data;
598 int len;
599
600 if (!ibm || !ibm->read)
601 return -EINVAL;
602
603 len = ibm->read(page);
604 if (len < 0)
605 return len;
606
607 if (len <= off + count)
608 *eof = 1;
609 *start = page + off;
610 len -= off;
611 if (len > count)
612 len = count;
613 if (len < 0)
614 len = 0;
615
616 return len;
617 }
618
619 static int dispatch_procfs_write(struct file *file,
620 const char __user *userbuf,
621 unsigned long count, void *data)
622 {
623 struct ibm_struct *ibm = data;
624 char *kernbuf;
625 int ret;
626
627 if (!ibm || !ibm->write)
628 return -EINVAL;
629
630 kernbuf = kmalloc(count + 2, GFP_KERNEL);
631 if (!kernbuf)
632 return -ENOMEM;
633
634 if (copy_from_user(kernbuf, userbuf, count)) {
635 kfree(kernbuf);
636 return -EFAULT;
637 }
638
639 kernbuf[count] = 0;
640 strcat(kernbuf, ",");
641 ret = ibm->write(kernbuf);
642 if (ret == 0)
643 ret = count;
644
645 kfree(kernbuf);
646
647 return ret;
648 }
649
650 static char *next_cmd(char **cmds)
651 {
652 char *start = *cmds;
653 char *end;
654
655 while ((end = strchr(start, ',')) && end == start)
656 start = end + 1;
657
658 if (!end)
659 return NULL;
660
661 *end = 0;
662 *cmds = end + 1;
663 return start;
664 }
665
666
667 /****************************************************************************
668 ****************************************************************************
669 *
670 * Device model: input, hwmon and platform
671 *
672 ****************************************************************************
673 ****************************************************************************/
674
675 static struct platform_device *tpacpi_pdev;
676 static struct platform_device *tpacpi_sensors_pdev;
677 static struct device *tpacpi_hwmon;
678 static struct input_dev *tpacpi_inputdev;
679 static struct mutex tpacpi_inputdev_send_mutex;
680 static LIST_HEAD(tpacpi_all_drivers);
681
682 static int tpacpi_suspend_handler(struct platform_device *pdev,
683 pm_message_t state)
684 {
685 struct ibm_struct *ibm, *itmp;
686
687 list_for_each_entry_safe(ibm, itmp,
688 &tpacpi_all_drivers,
689 all_drivers) {
690 if (ibm->suspend)
691 (ibm->suspend)(state);
692 }
693
694 return 0;
695 }
696
697 static int tpacpi_resume_handler(struct platform_device *pdev)
698 {
699 struct ibm_struct *ibm, *itmp;
700
701 list_for_each_entry_safe(ibm, itmp,
702 &tpacpi_all_drivers,
703 all_drivers) {
704 if (ibm->resume)
705 (ibm->resume)();
706 }
707
708 return 0;
709 }
710
711 static struct platform_driver tpacpi_pdriver = {
712 .driver = {
713 .name = TPACPI_DRVR_NAME,
714 .owner = THIS_MODULE,
715 },
716 .suspend = tpacpi_suspend_handler,
717 .resume = tpacpi_resume_handler,
718 };
719
720 static struct platform_driver tpacpi_hwmon_pdriver = {
721 .driver = {
722 .name = TPACPI_HWMON_DRVR_NAME,
723 .owner = THIS_MODULE,
724 },
725 };
726
727 /*************************************************************************
728 * sysfs support helpers
729 */
730
731 struct attribute_set {
732 unsigned int members, max_members;
733 struct attribute_group group;
734 };
735
736 struct attribute_set_obj {
737 struct attribute_set s;
738 struct attribute *a;
739 } __attribute__((packed));
740
741 static struct attribute_set *create_attr_set(unsigned int max_members,
742 const char *name)
743 {
744 struct attribute_set_obj *sobj;
745
746 if (max_members == 0)
747 return NULL;
748
749 /* Allocates space for implicit NULL at the end too */
750 sobj = kzalloc(sizeof(struct attribute_set_obj) +
751 max_members * sizeof(struct attribute *),
752 GFP_KERNEL);
753 if (!sobj)
754 return NULL;
755 sobj->s.max_members = max_members;
756 sobj->s.group.attrs = &sobj->a;
757 sobj->s.group.name = name;
758
759 return &sobj->s;
760 }
761
762 #define destroy_attr_set(_set) \
763 kfree(_set);
764
765 /* not multi-threaded safe, use it in a single thread per set */
766 static int add_to_attr_set(struct attribute_set *s, struct attribute *attr)
767 {
768 if (!s || !attr)
769 return -EINVAL;
770
771 if (s->members >= s->max_members)
772 return -ENOMEM;
773
774 s->group.attrs[s->members] = attr;
775 s->members++;
776
777 return 0;
778 }
779
780 static int add_many_to_attr_set(struct attribute_set *s,
781 struct attribute **attr,
782 unsigned int count)
783 {
784 int i, res;
785
786 for (i = 0; i < count; i++) {
787 res = add_to_attr_set(s, attr[i]);
788 if (res)
789 return res;
790 }
791
792 return 0;
793 }
794
795 static void delete_attr_set(struct attribute_set *s, struct kobject *kobj)
796 {
797 sysfs_remove_group(kobj, &s->group);
798 destroy_attr_set(s);
799 }
800
801 #define register_attr_set_with_sysfs(_attr_set, _kobj) \
802 sysfs_create_group(_kobj, &_attr_set->group)
803
804 static int parse_strtoul(const char *buf,
805 unsigned long max, unsigned long *value)
806 {
807 char *endp;
808
809 while (*buf && isspace(*buf))
810 buf++;
811 *value = simple_strtoul(buf, &endp, 0);
812 while (*endp && isspace(*endp))
813 endp++;
814 if (*endp || *value > max)
815 return -EINVAL;
816
817 return 0;
818 }
819
820 static int __init tpacpi_query_bcl_levels(acpi_handle handle)
821 {
822 struct acpi_buffer buffer = { ACPI_ALLOCATE_BUFFER, NULL };
823 union acpi_object *obj;
824 int rc;
825
826 if (ACPI_SUCCESS(acpi_evaluate_object(handle, NULL, NULL, &buffer))) {
827 obj = (union acpi_object *)buffer.pointer;
828 if (!obj || (obj->type != ACPI_TYPE_PACKAGE)) {
829 printk(TPACPI_ERR "Unknown _BCL data, "
830 "please report this to %s\n", TPACPI_MAIL);
831 rc = 0;
832 } else {
833 rc = obj->package.count;
834 }
835 } else {
836 return 0;
837 }
838
839 kfree(buffer.pointer);
840 return rc;
841 }
842
843 static acpi_status __init tpacpi_acpi_walk_find_bcl(acpi_handle handle,
844 u32 lvl, void *context, void **rv)
845 {
846 char name[ACPI_PATH_SEGMENT_LENGTH];
847 struct acpi_buffer buffer = { sizeof(name), &name };
848
849 if (ACPI_SUCCESS(acpi_get_name(handle, ACPI_SINGLE_NAME, &buffer)) &&
850 !strncmp("_BCL", name, sizeof(name) - 1)) {
851 BUG_ON(!rv || !*rv);
852 **(int **)rv = tpacpi_query_bcl_levels(handle);
853 return AE_CTRL_TERMINATE;
854 } else {
855 return AE_OK;
856 }
857 }
858
859 /*
860 * Returns 0 (no ACPI _BCL or _BCL invalid), or size of brightness map
861 */
862 static int __init tpacpi_check_std_acpi_brightness_support(void)
863 {
864 int status;
865 int bcl_levels = 0;
866 void *bcl_ptr = &bcl_levels;
867
868 if (!vid_handle) {
869 TPACPI_ACPIHANDLE_INIT(vid);
870 }
871 if (!vid_handle)
872 return 0;
873
874 /*
875 * Search for a _BCL method, and execute it. This is safe on all
876 * ThinkPads, and as a side-effect, _BCL will place a Lenovo Vista
877 * BIOS in ACPI backlight control mode. We do NOT have to care
878 * about calling the _BCL method in an enabled video device, any
879 * will do for our purposes.
880 */
881
882 status = acpi_walk_namespace(ACPI_TYPE_METHOD, vid_handle, 3,
883 tpacpi_acpi_walk_find_bcl, NULL,
884 &bcl_ptr);
885
886 if (ACPI_SUCCESS(status) && bcl_levels > 2) {
887 tp_features.bright_acpimode = 1;
888 return (bcl_levels - 2);
889 }
890
891 return 0;
892 }
893
894 /*************************************************************************
895 * thinkpad-acpi driver attributes
896 */
897
898 /* interface_version --------------------------------------------------- */
899 static ssize_t tpacpi_driver_interface_version_show(
900 struct device_driver *drv,
901 char *buf)
902 {
903 return snprintf(buf, PAGE_SIZE, "0x%08x\n", TPACPI_SYSFS_VERSION);
904 }
905
906 static DRIVER_ATTR(interface_version, S_IRUGO,
907 tpacpi_driver_interface_version_show, NULL);
908
909 /* debug_level --------------------------------------------------------- */
910 static ssize_t tpacpi_driver_debug_show(struct device_driver *drv,
911 char *buf)
912 {
913 return snprintf(buf, PAGE_SIZE, "0x%04x\n", dbg_level);
914 }
915
916 static ssize_t tpacpi_driver_debug_store(struct device_driver *drv,
917 const char *buf, size_t count)
918 {
919 unsigned long t;
920
921 if (parse_strtoul(buf, 0xffff, &t))
922 return -EINVAL;
923
924 dbg_level = t;
925
926 return count;
927 }
928
929 static DRIVER_ATTR(debug_level, S_IWUSR | S_IRUGO,
930 tpacpi_driver_debug_show, tpacpi_driver_debug_store);
931
932 /* version ------------------------------------------------------------- */
933 static ssize_t tpacpi_driver_version_show(struct device_driver *drv,
934 char *buf)
935 {
936 return snprintf(buf, PAGE_SIZE, "%s v%s\n",
937 TPACPI_DESC, TPACPI_VERSION);
938 }
939
940 static DRIVER_ATTR(version, S_IRUGO,
941 tpacpi_driver_version_show, NULL);
942
943 /* --------------------------------------------------------------------- */
944
945 static struct driver_attribute *tpacpi_driver_attributes[] = {
946 &driver_attr_debug_level, &driver_attr_version,
947 &driver_attr_interface_version,
948 };
949
950 static int __init tpacpi_create_driver_attributes(struct device_driver *drv)
951 {
952 int i, res;
953
954 i = 0;
955 res = 0;
956 while (!res && i < ARRAY_SIZE(tpacpi_driver_attributes)) {
957 res = driver_create_file(drv, tpacpi_driver_attributes[i]);
958 i++;
959 }
960
961 return res;
962 }
963
964 static void tpacpi_remove_driver_attributes(struct device_driver *drv)
965 {
966 int i;
967
968 for (i = 0; i < ARRAY_SIZE(tpacpi_driver_attributes); i++)
969 driver_remove_file(drv, tpacpi_driver_attributes[i]);
970 }
971
972 /****************************************************************************
973 ****************************************************************************
974 *
975 * Subdrivers
976 *
977 ****************************************************************************
978 ****************************************************************************/
979
980 /*************************************************************************
981 * thinkpad-acpi init subdriver
982 */
983
984 static int __init thinkpad_acpi_driver_init(struct ibm_init_struct *iibm)
985 {
986 printk(TPACPI_INFO "%s v%s\n", TPACPI_DESC, TPACPI_VERSION);
987 printk(TPACPI_INFO "%s\n", TPACPI_URL);
988
989 printk(TPACPI_INFO "ThinkPad BIOS %s, EC %s\n",
990 (thinkpad_id.bios_version_str) ?
991 thinkpad_id.bios_version_str : "unknown",
992 (thinkpad_id.ec_version_str) ?
993 thinkpad_id.ec_version_str : "unknown");
994
995 if (thinkpad_id.vendor && thinkpad_id.model_str)
996 printk(TPACPI_INFO "%s %s, model %s\n",
997 (thinkpad_id.vendor == PCI_VENDOR_ID_IBM) ?
998 "IBM" : ((thinkpad_id.vendor ==
999 PCI_VENDOR_ID_LENOVO) ?
1000 "Lenovo" : "Unknown vendor"),
1001 thinkpad_id.model_str,
1002 (thinkpad_id.nummodel_str) ?
1003 thinkpad_id.nummodel_str : "unknown");
1004
1005 return 0;
1006 }
1007
1008 static int thinkpad_acpi_driver_read(char *p)
1009 {
1010 int len = 0;
1011
1012 len += sprintf(p + len, "driver:\t\t%s\n", TPACPI_DESC);
1013 len += sprintf(p + len, "version:\t%s\n", TPACPI_VERSION);
1014
1015 return len;
1016 }
1017
1018 static struct ibm_struct thinkpad_acpi_driver_data = {
1019 .name = "driver",
1020 .read = thinkpad_acpi_driver_read,
1021 };
1022
1023 /*************************************************************************
1024 * Hotkey subdriver
1025 */
1026
1027 enum { /* hot key scan codes (derived from ACPI DSDT) */
1028 TP_ACPI_HOTKEYSCAN_FNF1 = 0,
1029 TP_ACPI_HOTKEYSCAN_FNF2,
1030 TP_ACPI_HOTKEYSCAN_FNF3,
1031 TP_ACPI_HOTKEYSCAN_FNF4,
1032 TP_ACPI_HOTKEYSCAN_FNF5,
1033 TP_ACPI_HOTKEYSCAN_FNF6,
1034 TP_ACPI_HOTKEYSCAN_FNF7,
1035 TP_ACPI_HOTKEYSCAN_FNF8,
1036 TP_ACPI_HOTKEYSCAN_FNF9,
1037 TP_ACPI_HOTKEYSCAN_FNF10,
1038 TP_ACPI_HOTKEYSCAN_FNF11,
1039 TP_ACPI_HOTKEYSCAN_FNF12,
1040 TP_ACPI_HOTKEYSCAN_FNBACKSPACE,
1041 TP_ACPI_HOTKEYSCAN_FNINSERT,
1042 TP_ACPI_HOTKEYSCAN_FNDELETE,
1043 TP_ACPI_HOTKEYSCAN_FNHOME,
1044 TP_ACPI_HOTKEYSCAN_FNEND,
1045 TP_ACPI_HOTKEYSCAN_FNPAGEUP,
1046 TP_ACPI_HOTKEYSCAN_FNPAGEDOWN,
1047 TP_ACPI_HOTKEYSCAN_FNSPACE,
1048 TP_ACPI_HOTKEYSCAN_VOLUMEUP,
1049 TP_ACPI_HOTKEYSCAN_VOLUMEDOWN,
1050 TP_ACPI_HOTKEYSCAN_MUTE,
1051 TP_ACPI_HOTKEYSCAN_THINKPAD,
1052 };
1053
1054 enum { /* Keys available through NVRAM polling */
1055 TPACPI_HKEY_NVRAM_KNOWN_MASK = 0x00fb88c0U,
1056 TPACPI_HKEY_NVRAM_GOOD_MASK = 0x00fb8000U,
1057 };
1058
1059 enum { /* Positions of some of the keys in hotkey masks */
1060 TP_ACPI_HKEY_DISPSWTCH_MASK = 1 << TP_ACPI_HOTKEYSCAN_FNF7,
1061 TP_ACPI_HKEY_DISPXPAND_MASK = 1 << TP_ACPI_HOTKEYSCAN_FNF8,
1062 TP_ACPI_HKEY_HIBERNATE_MASK = 1 << TP_ACPI_HOTKEYSCAN_FNF12,
1063 TP_ACPI_HKEY_BRGHTUP_MASK = 1 << TP_ACPI_HOTKEYSCAN_FNHOME,
1064 TP_ACPI_HKEY_BRGHTDWN_MASK = 1 << TP_ACPI_HOTKEYSCAN_FNEND,
1065 TP_ACPI_HKEY_THNKLGHT_MASK = 1 << TP_ACPI_HOTKEYSCAN_FNPAGEUP,
1066 TP_ACPI_HKEY_ZOOM_MASK = 1 << TP_ACPI_HOTKEYSCAN_FNSPACE,
1067 TP_ACPI_HKEY_VOLUP_MASK = 1 << TP_ACPI_HOTKEYSCAN_VOLUMEUP,
1068 TP_ACPI_HKEY_VOLDWN_MASK = 1 << TP_ACPI_HOTKEYSCAN_VOLUMEDOWN,
1069 TP_ACPI_HKEY_MUTE_MASK = 1 << TP_ACPI_HOTKEYSCAN_MUTE,
1070 TP_ACPI_HKEY_THINKPAD_MASK = 1 << TP_ACPI_HOTKEYSCAN_THINKPAD,
1071 };
1072
1073 enum { /* NVRAM to ACPI HKEY group map */
1074 TP_NVRAM_HKEY_GROUP_HK2 = TP_ACPI_HKEY_THINKPAD_MASK |
1075 TP_ACPI_HKEY_ZOOM_MASK |
1076 TP_ACPI_HKEY_DISPSWTCH_MASK |
1077 TP_ACPI_HKEY_HIBERNATE_MASK,
1078 TP_NVRAM_HKEY_GROUP_BRIGHTNESS = TP_ACPI_HKEY_BRGHTUP_MASK |
1079 TP_ACPI_HKEY_BRGHTDWN_MASK,
1080 TP_NVRAM_HKEY_GROUP_VOLUME = TP_ACPI_HKEY_VOLUP_MASK |
1081 TP_ACPI_HKEY_VOLDWN_MASK |
1082 TP_ACPI_HKEY_MUTE_MASK,
1083 };
1084
1085 #ifdef CONFIG_THINKPAD_ACPI_HOTKEY_POLL
1086 struct tp_nvram_state {
1087 u16 thinkpad_toggle:1;
1088 u16 zoom_toggle:1;
1089 u16 display_toggle:1;
1090 u16 thinklight_toggle:1;
1091 u16 hibernate_toggle:1;
1092 u16 displayexp_toggle:1;
1093 u16 display_state:1;
1094 u16 brightness_toggle:1;
1095 u16 volume_toggle:1;
1096 u16 mute:1;
1097
1098 u8 brightness_level;
1099 u8 volume_level;
1100 };
1101
1102 static struct task_struct *tpacpi_hotkey_task;
1103 static u32 hotkey_source_mask; /* bit mask 0=ACPI,1=NVRAM */
1104 static int hotkey_poll_freq = 10; /* Hz */
1105 static struct mutex hotkey_thread_mutex;
1106 static struct mutex hotkey_thread_data_mutex;
1107 static unsigned int hotkey_config_change;
1108
1109 #else /* CONFIG_THINKPAD_ACPI_HOTKEY_POLL */
1110
1111 #define hotkey_source_mask 0U
1112
1113 #endif /* CONFIG_THINKPAD_ACPI_HOTKEY_POLL */
1114
1115 static struct mutex hotkey_mutex;
1116
1117 static enum { /* Reasons for waking up */
1118 TP_ACPI_WAKEUP_NONE = 0, /* None or unknown */
1119 TP_ACPI_WAKEUP_BAYEJ, /* Bay ejection request */
1120 TP_ACPI_WAKEUP_UNDOCK, /* Undock request */
1121 } hotkey_wakeup_reason;
1122
1123 static int hotkey_autosleep_ack;
1124
1125 static int hotkey_orig_status;
1126 static u32 hotkey_orig_mask;
1127 static u32 hotkey_all_mask;
1128 static u32 hotkey_reserved_mask;
1129 static u32 hotkey_mask;
1130
1131 static unsigned int hotkey_report_mode;
1132
1133 static u16 *hotkey_keycode_map;
1134
1135 static struct attribute_set *hotkey_dev_attributes;
1136
1137 #ifdef CONFIG_THINKPAD_ACPI_HOTKEY_POLL
1138 #define HOTKEY_CONFIG_CRITICAL_START \
1139 do { \
1140 mutex_lock(&hotkey_thread_data_mutex); \
1141 hotkey_config_change++; \
1142 } while (0);
1143 #define HOTKEY_CONFIG_CRITICAL_END \
1144 mutex_unlock(&hotkey_thread_data_mutex);
1145 #else
1146 #define HOTKEY_CONFIG_CRITICAL_START
1147 #define HOTKEY_CONFIG_CRITICAL_END
1148 #endif /* CONFIG_THINKPAD_ACPI_HOTKEY_POLL */
1149
1150 /* HKEY.MHKG() return bits */
1151 #define TP_HOTKEY_TABLET_MASK (1 << 3)
1152
1153 static int hotkey_get_wlsw(int *status)
1154 {
1155 if (!acpi_evalf(hkey_handle, status, "WLSW", "d"))
1156 return -EIO;
1157 return 0;
1158 }
1159
1160 static int hotkey_get_tablet_mode(int *status)
1161 {
1162 int s;
1163
1164 if (!acpi_evalf(hkey_handle, &s, "MHKG", "d"))
1165 return -EIO;
1166
1167 *status = ((s & TP_HOTKEY_TABLET_MASK) != 0);
1168 return 0;
1169 }
1170
1171 /*
1172 * Call with hotkey_mutex held
1173 */
1174 static int hotkey_mask_get(void)
1175 {
1176 u32 m = 0;
1177
1178 if (tp_features.hotkey_mask) {
1179 if (!acpi_evalf(hkey_handle, &m, "DHKN", "d"))
1180 return -EIO;
1181 }
1182 hotkey_mask = m | (hotkey_source_mask & hotkey_mask);
1183
1184 return 0;
1185 }
1186
1187 /*
1188 * Call with hotkey_mutex held
1189 */
1190 static int hotkey_mask_set(u32 mask)
1191 {
1192 int i;
1193 int rc = 0;
1194
1195 if (tp_features.hotkey_mask) {
1196 if (!tp_warned.hotkey_mask_ff &&
1197 (mask == 0xffff || mask == 0xffffff ||
1198 mask == 0xffffffff)) {
1199 tp_warned.hotkey_mask_ff = 1;
1200 printk(TPACPI_NOTICE
1201 "setting the hotkey mask to 0x%08x is likely "
1202 "not the best way to go about it\n", mask);
1203 printk(TPACPI_NOTICE
1204 "please consider using the driver defaults, "
1205 "and refer to up-to-date thinkpad-acpi "
1206 "documentation\n");
1207 }
1208
1209 HOTKEY_CONFIG_CRITICAL_START
1210 for (i = 0; i < 32; i++) {
1211 u32 m = 1 << i;
1212 /* enable in firmware mask only keys not in NVRAM
1213 * mode, but enable the key in the cached hotkey_mask
1214 * regardless of mode, or the key will end up
1215 * disabled by hotkey_mask_get() */
1216 if (!acpi_evalf(hkey_handle,
1217 NULL, "MHKM", "vdd", i + 1,
1218 !!((mask & ~hotkey_source_mask) & m))) {
1219 rc = -EIO;
1220 break;
1221 } else {
1222 hotkey_mask = (hotkey_mask & ~m) | (mask & m);
1223 }
1224 }
1225 HOTKEY_CONFIG_CRITICAL_END
1226
1227 /* hotkey_mask_get must be called unconditionally below */
1228 if (!hotkey_mask_get() && !rc &&
1229 (hotkey_mask & ~hotkey_source_mask) !=
1230 (mask & ~hotkey_source_mask)) {
1231 printk(TPACPI_NOTICE
1232 "requested hot key mask 0x%08x, but "
1233 "firmware forced it to 0x%08x\n",
1234 mask, hotkey_mask);
1235 }
1236 } else {
1237 #ifdef CONFIG_THINKPAD_ACPI_HOTKEY_POLL
1238 HOTKEY_CONFIG_CRITICAL_START
1239 hotkey_mask = mask & hotkey_source_mask;
1240 HOTKEY_CONFIG_CRITICAL_END
1241 hotkey_mask_get();
1242 if (hotkey_mask != mask) {
1243 printk(TPACPI_NOTICE
1244 "requested hot key mask 0x%08x, "
1245 "forced to 0x%08x (NVRAM poll mask is "
1246 "0x%08x): no firmware mask support\n",
1247 mask, hotkey_mask, hotkey_source_mask);
1248 }
1249 #else
1250 hotkey_mask_get();
1251 rc = -ENXIO;
1252 #endif /* CONFIG_THINKPAD_ACPI_HOTKEY_POLL */
1253 }
1254
1255 return rc;
1256 }
1257
1258 static int hotkey_status_get(int *status)
1259 {
1260 if (!acpi_evalf(hkey_handle, status, "DHKC", "d"))
1261 return -EIO;
1262
1263 return 0;
1264 }
1265
1266 static int hotkey_status_set(int status)
1267 {
1268 if (!acpi_evalf(hkey_handle, NULL, "MHKC", "vd", status))
1269 return -EIO;
1270
1271 return 0;
1272 }
1273
1274 static void tpacpi_input_send_radiosw(void)
1275 {
1276 int wlsw;
1277
1278 if (tp_features.hotkey_wlsw && !hotkey_get_wlsw(&wlsw)) {
1279 mutex_lock(&tpacpi_inputdev_send_mutex);
1280
1281 input_report_switch(tpacpi_inputdev,
1282 SW_RADIO, !!wlsw);
1283 input_sync(tpacpi_inputdev);
1284
1285 mutex_unlock(&tpacpi_inputdev_send_mutex);
1286 }
1287 }
1288
1289 static void tpacpi_input_send_tabletsw(void)
1290 {
1291 int state;
1292
1293 if (tp_features.hotkey_tablet &&
1294 !hotkey_get_tablet_mode(&state)) {
1295 mutex_lock(&tpacpi_inputdev_send_mutex);
1296
1297 input_report_switch(tpacpi_inputdev,
1298 SW_TABLET_MODE, !!state);
1299 input_sync(tpacpi_inputdev);
1300
1301 mutex_unlock(&tpacpi_inputdev_send_mutex);
1302 }
1303 }
1304
1305 static void tpacpi_input_send_key(unsigned int scancode)
1306 {
1307 unsigned int keycode;
1308
1309 keycode = hotkey_keycode_map[scancode];
1310
1311 if (keycode != KEY_RESERVED) {
1312 mutex_lock(&tpacpi_inputdev_send_mutex);
1313
1314 input_report_key(tpacpi_inputdev, keycode, 1);
1315 if (keycode == KEY_UNKNOWN)
1316 input_event(tpacpi_inputdev, EV_MSC, MSC_SCAN,
1317 scancode);
1318 input_sync(tpacpi_inputdev);
1319
1320 input_report_key(tpacpi_inputdev, keycode, 0);
1321 if (keycode == KEY_UNKNOWN)
1322 input_event(tpacpi_inputdev, EV_MSC, MSC_SCAN,
1323 scancode);
1324 input_sync(tpacpi_inputdev);
1325
1326 mutex_unlock(&tpacpi_inputdev_send_mutex);
1327 }
1328 }
1329
1330 #ifdef CONFIG_THINKPAD_ACPI_HOTKEY_POLL
1331 static struct tp_acpi_drv_struct ibm_hotkey_acpidriver;
1332
1333 static void tpacpi_hotkey_send_key(unsigned int scancode)
1334 {
1335 tpacpi_input_send_key(scancode);
1336 if (hotkey_report_mode < 2) {
1337 acpi_bus_generate_proc_event(ibm_hotkey_acpidriver.device,
1338 0x80, 0x1001 + scancode);
1339 }
1340 }
1341
1342 static void hotkey_read_nvram(struct tp_nvram_state *n, u32 m)
1343 {
1344 u8 d;
1345
1346 if (m & TP_NVRAM_HKEY_GROUP_HK2) {
1347 d = nvram_read_byte(TP_NVRAM_ADDR_HK2);
1348 n->thinkpad_toggle = !!(d & TP_NVRAM_MASK_HKT_THINKPAD);
1349 n->zoom_toggle = !!(d & TP_NVRAM_MASK_HKT_ZOOM);
1350 n->display_toggle = !!(d & TP_NVRAM_MASK_HKT_DISPLAY);
1351 n->hibernate_toggle = !!(d & TP_NVRAM_MASK_HKT_HIBERNATE);
1352 }
1353 if (m & TP_ACPI_HKEY_THNKLGHT_MASK) {
1354 d = nvram_read_byte(TP_NVRAM_ADDR_THINKLIGHT);
1355 n->thinklight_toggle = !!(d & TP_NVRAM_MASK_THINKLIGHT);
1356 }
1357 if (m & TP_ACPI_HKEY_DISPXPAND_MASK) {
1358 d = nvram_read_byte(TP_NVRAM_ADDR_VIDEO);
1359 n->displayexp_toggle =
1360 !!(d & TP_NVRAM_MASK_HKT_DISPEXPND);
1361 }
1362 if (m & TP_NVRAM_HKEY_GROUP_BRIGHTNESS) {
1363 d = nvram_read_byte(TP_NVRAM_ADDR_BRIGHTNESS);
1364 n->brightness_level = (d & TP_NVRAM_MASK_LEVEL_BRIGHTNESS)
1365 >> TP_NVRAM_POS_LEVEL_BRIGHTNESS;
1366 n->brightness_toggle =
1367 !!(d & TP_NVRAM_MASK_HKT_BRIGHTNESS);
1368 }
1369 if (m & TP_NVRAM_HKEY_GROUP_VOLUME) {
1370 d = nvram_read_byte(TP_NVRAM_ADDR_MIXER);
1371 n->volume_level = (d & TP_NVRAM_MASK_LEVEL_VOLUME)
1372 >> TP_NVRAM_POS_LEVEL_VOLUME;
1373 n->mute = !!(d & TP_NVRAM_MASK_MUTE);
1374 n->volume_toggle = !!(d & TP_NVRAM_MASK_HKT_VOLUME);
1375 }
1376 }
1377
1378 #define TPACPI_COMPARE_KEY(__scancode, __member) \
1379 do { \
1380 if ((mask & (1 << __scancode)) && \
1381 oldn->__member != newn->__member) \
1382 tpacpi_hotkey_send_key(__scancode); \
1383 } while (0)
1384
1385 #define TPACPI_MAY_SEND_KEY(__scancode) \
1386 do { if (mask & (1 << __scancode)) \
1387 tpacpi_hotkey_send_key(__scancode); } while (0)
1388
1389 static void hotkey_compare_and_issue_event(struct tp_nvram_state *oldn,
1390 struct tp_nvram_state *newn,
1391 u32 mask)
1392 {
1393 TPACPI_COMPARE_KEY(TP_ACPI_HOTKEYSCAN_THINKPAD, thinkpad_toggle);
1394 TPACPI_COMPARE_KEY(TP_ACPI_HOTKEYSCAN_FNSPACE, zoom_toggle);
1395 TPACPI_COMPARE_KEY(TP_ACPI_HOTKEYSCAN_FNF7, display_toggle);
1396 TPACPI_COMPARE_KEY(TP_ACPI_HOTKEYSCAN_FNF12, hibernate_toggle);
1397
1398 TPACPI_COMPARE_KEY(TP_ACPI_HOTKEYSCAN_FNPAGEUP, thinklight_toggle);
1399
1400 TPACPI_COMPARE_KEY(TP_ACPI_HOTKEYSCAN_FNF8, displayexp_toggle);
1401
1402 /* handle volume */
1403 if (oldn->volume_toggle != newn->volume_toggle) {
1404 if (oldn->mute != newn->mute) {
1405 TPACPI_MAY_SEND_KEY(TP_ACPI_HOTKEYSCAN_MUTE);
1406 }
1407 if (oldn->volume_level > newn->volume_level) {
1408 TPACPI_MAY_SEND_KEY(TP_ACPI_HOTKEYSCAN_VOLUMEDOWN);
1409 } else if (oldn->volume_level < newn->volume_level) {
1410 TPACPI_MAY_SEND_KEY(TP_ACPI_HOTKEYSCAN_VOLUMEUP);
1411 } else if (oldn->mute == newn->mute) {
1412 /* repeated key presses that didn't change state */
1413 if (newn->mute) {
1414 TPACPI_MAY_SEND_KEY(TP_ACPI_HOTKEYSCAN_MUTE);
1415 } else if (newn->volume_level != 0) {
1416 TPACPI_MAY_SEND_KEY(TP_ACPI_HOTKEYSCAN_VOLUMEUP);
1417 } else {
1418 TPACPI_MAY_SEND_KEY(TP_ACPI_HOTKEYSCAN_VOLUMEDOWN);
1419 }
1420 }
1421 }
1422
1423 /* handle brightness */
1424 if (oldn->brightness_toggle != newn->brightness_toggle) {
1425 if (oldn->brightness_level < newn->brightness_level) {
1426 TPACPI_MAY_SEND_KEY(TP_ACPI_HOTKEYSCAN_FNHOME);
1427 } else if (oldn->brightness_level > newn->brightness_level) {
1428 TPACPI_MAY_SEND_KEY(TP_ACPI_HOTKEYSCAN_FNEND);
1429 } else {
1430 /* repeated key presses that didn't change state */
1431 if (newn->brightness_level != 0) {
1432 TPACPI_MAY_SEND_KEY(TP_ACPI_HOTKEYSCAN_FNHOME);
1433 } else {
1434 TPACPI_MAY_SEND_KEY(TP_ACPI_HOTKEYSCAN_FNEND);
1435 }
1436 }
1437 }
1438 }
1439
1440 #undef TPACPI_COMPARE_KEY
1441 #undef TPACPI_MAY_SEND_KEY
1442
1443 static int hotkey_kthread(void *data)
1444 {
1445 struct tp_nvram_state s[2];
1446 u32 mask;
1447 unsigned int si, so;
1448 unsigned long t;
1449 unsigned int change_detector, must_reset;
1450
1451 mutex_lock(&hotkey_thread_mutex);
1452
1453 if (tpacpi_lifecycle == TPACPI_LIFE_EXITING)
1454 goto exit;
1455
1456 set_freezable();
1457
1458 so = 0;
1459 si = 1;
1460 t = 0;
1461
1462 /* Initial state for compares */
1463 mutex_lock(&hotkey_thread_data_mutex);
1464 change_detector = hotkey_config_change;
1465 mask = hotkey_source_mask & hotkey_mask;
1466 mutex_unlock(&hotkey_thread_data_mutex);
1467 hotkey_read_nvram(&s[so], mask);
1468
1469 while (!kthread_should_stop() && hotkey_poll_freq) {
1470 if (t == 0)
1471 t = 1000/hotkey_poll_freq;
1472 t = msleep_interruptible(t);
1473 if (unlikely(kthread_should_stop()))
1474 break;
1475 must_reset = try_to_freeze();
1476 if (t > 0 && !must_reset)
1477 continue;
1478
1479 mutex_lock(&hotkey_thread_data_mutex);
1480 if (must_reset || hotkey_config_change != change_detector) {
1481 /* forget old state on thaw or config change */
1482 si = so;
1483 t = 0;
1484 change_detector = hotkey_config_change;
1485 }
1486 mask = hotkey_source_mask & hotkey_mask;
1487 mutex_unlock(&hotkey_thread_data_mutex);
1488
1489 if (likely(mask)) {
1490 hotkey_read_nvram(&s[si], mask);
1491 if (likely(si != so)) {
1492 hotkey_compare_and_issue_event(&s[so], &s[si],
1493 mask);
1494 }
1495 }
1496
1497 so = si;
1498 si ^= 1;
1499 }
1500
1501 exit:
1502 mutex_unlock(&hotkey_thread_mutex);
1503 return 0;
1504 }
1505
1506 static void hotkey_poll_stop_sync(void)
1507 {
1508 if (tpacpi_hotkey_task) {
1509 if (frozen(tpacpi_hotkey_task) ||
1510 freezing(tpacpi_hotkey_task))
1511 thaw_process(tpacpi_hotkey_task);
1512
1513 kthread_stop(tpacpi_hotkey_task);
1514 tpacpi_hotkey_task = NULL;
1515 mutex_lock(&hotkey_thread_mutex);
1516 /* at this point, the thread did exit */
1517 mutex_unlock(&hotkey_thread_mutex);
1518 }
1519 }
1520
1521 /* call with hotkey_mutex held */
1522 static void hotkey_poll_setup(int may_warn)
1523 {
1524 if ((hotkey_source_mask & hotkey_mask) != 0 &&
1525 hotkey_poll_freq > 0 &&
1526 (tpacpi_inputdev->users > 0 || hotkey_report_mode < 2)) {
1527 if (!tpacpi_hotkey_task) {
1528 tpacpi_hotkey_task = kthread_run(hotkey_kthread,
1529 NULL, TPACPI_NVRAM_KTHREAD_NAME);
1530 if (IS_ERR(tpacpi_hotkey_task)) {
1531 tpacpi_hotkey_task = NULL;
1532 printk(TPACPI_ERR
1533 "could not create kernel thread "
1534 "for hotkey polling\n");
1535 }
1536 }
1537 } else {
1538 hotkey_poll_stop_sync();
1539 if (may_warn &&
1540 hotkey_source_mask != 0 && hotkey_poll_freq == 0) {
1541 printk(TPACPI_NOTICE
1542 "hot keys 0x%08x require polling, "
1543 "which is currently disabled\n",
1544 hotkey_source_mask);
1545 }
1546 }
1547 }
1548
1549 static void hotkey_poll_setup_safe(int may_warn)
1550 {
1551 mutex_lock(&hotkey_mutex);
1552 hotkey_poll_setup(may_warn);
1553 mutex_unlock(&hotkey_mutex);
1554 }
1555
1556 #else /* CONFIG_THINKPAD_ACPI_HOTKEY_POLL */
1557
1558 static void hotkey_poll_setup_safe(int __unused)
1559 {
1560 }
1561
1562 #endif /* CONFIG_THINKPAD_ACPI_HOTKEY_POLL */
1563
1564 static int hotkey_inputdev_open(struct input_dev *dev)
1565 {
1566 switch (tpacpi_lifecycle) {
1567 case TPACPI_LIFE_INIT:
1568 /*
1569 * hotkey_init will call hotkey_poll_setup_safe
1570 * at the appropriate moment
1571 */
1572 return 0;
1573 case TPACPI_LIFE_EXITING:
1574 return -EBUSY;
1575 case TPACPI_LIFE_RUNNING:
1576 hotkey_poll_setup_safe(0);
1577 return 0;
1578 }
1579
1580 /* Should only happen if tpacpi_lifecycle is corrupt */
1581 BUG();
1582 return -EBUSY;
1583 }
1584
1585 static void hotkey_inputdev_close(struct input_dev *dev)
1586 {
1587 /* disable hotkey polling when possible */
1588 if (tpacpi_lifecycle == TPACPI_LIFE_RUNNING)
1589 hotkey_poll_setup_safe(0);
1590 }
1591
1592 /* sysfs hotkey enable ------------------------------------------------- */
1593 static ssize_t hotkey_enable_show(struct device *dev,
1594 struct device_attribute *attr,
1595 char *buf)
1596 {
1597 int res, status;
1598
1599 res = hotkey_status_get(&status);
1600 if (res)
1601 return res;
1602
1603 return snprintf(buf, PAGE_SIZE, "%d\n", status);
1604 }
1605
1606 static ssize_t hotkey_enable_store(struct device *dev,
1607 struct device_attribute *attr,
1608 const char *buf, size_t count)
1609 {
1610 unsigned long t;
1611 int res;
1612
1613 if (parse_strtoul(buf, 1, &t))
1614 return -EINVAL;
1615
1616 res = hotkey_status_set(t);
1617
1618 return (res) ? res : count;
1619 }
1620
1621 static struct device_attribute dev_attr_hotkey_enable =
1622 __ATTR(hotkey_enable, S_IWUSR | S_IRUGO,
1623 hotkey_enable_show, hotkey_enable_store);
1624
1625 /* sysfs hotkey mask --------------------------------------------------- */
1626 static ssize_t hotkey_mask_show(struct device *dev,
1627 struct device_attribute *attr,
1628 char *buf)
1629 {
1630 int res;
1631
1632 if (mutex_lock_interruptible(&hotkey_mutex))
1633 return -ERESTARTSYS;
1634 res = hotkey_mask_get();
1635 mutex_unlock(&hotkey_mutex);
1636
1637 return (res)?
1638 res : snprintf(buf, PAGE_SIZE, "0x%08x\n", hotkey_mask);
1639 }
1640
1641 static ssize_t hotkey_mask_store(struct device *dev,
1642 struct device_attribute *attr,
1643 const char *buf, size_t count)
1644 {
1645 unsigned long t;
1646 int res;
1647
1648 if (parse_strtoul(buf, 0xffffffffUL, &t))
1649 return -EINVAL;
1650
1651 if (mutex_lock_interruptible(&hotkey_mutex))
1652 return -ERESTARTSYS;
1653
1654 res = hotkey_mask_set(t);
1655
1656 #ifdef CONFIG_THINKPAD_ACPI_HOTKEY_POLL
1657 hotkey_poll_setup(1);
1658 #endif
1659
1660 mutex_unlock(&hotkey_mutex);
1661
1662 return (res) ? res : count;
1663 }
1664
1665 static struct device_attribute dev_attr_hotkey_mask =
1666 __ATTR(hotkey_mask, S_IWUSR | S_IRUGO,
1667 hotkey_mask_show, hotkey_mask_store);
1668
1669 /* sysfs hotkey bios_enabled ------------------------------------------- */
1670 static ssize_t hotkey_bios_enabled_show(struct device *dev,
1671 struct device_attribute *attr,
1672 char *buf)
1673 {
1674 return snprintf(buf, PAGE_SIZE, "%d\n", hotkey_orig_status);
1675 }
1676
1677 static struct device_attribute dev_attr_hotkey_bios_enabled =
1678 __ATTR(hotkey_bios_enabled, S_IRUGO, hotkey_bios_enabled_show, NULL);
1679
1680 /* sysfs hotkey bios_mask ---------------------------------------------- */
1681 static ssize_t hotkey_bios_mask_show(struct device *dev,
1682 struct device_attribute *attr,
1683 char *buf)
1684 {
1685 return snprintf(buf, PAGE_SIZE, "0x%08x\n", hotkey_orig_mask);
1686 }
1687
1688 static struct device_attribute dev_attr_hotkey_bios_mask =
1689 __ATTR(hotkey_bios_mask, S_IRUGO, hotkey_bios_mask_show, NULL);
1690
1691 /* sysfs hotkey all_mask ----------------------------------------------- */
1692 static ssize_t hotkey_all_mask_show(struct device *dev,
1693 struct device_attribute *attr,
1694 char *buf)
1695 {
1696 return snprintf(buf, PAGE_SIZE, "0x%08x\n",
1697 hotkey_all_mask | hotkey_source_mask);
1698 }
1699
1700 static struct device_attribute dev_attr_hotkey_all_mask =
1701 __ATTR(hotkey_all_mask, S_IRUGO, hotkey_all_mask_show, NULL);
1702
1703 /* sysfs hotkey recommended_mask --------------------------------------- */
1704 static ssize_t hotkey_recommended_mask_show(struct device *dev,
1705 struct device_attribute *attr,
1706 char *buf)
1707 {
1708 return snprintf(buf, PAGE_SIZE, "0x%08x\n",
1709 (hotkey_all_mask | hotkey_source_mask)
1710 & ~hotkey_reserved_mask);
1711 }
1712
1713 static struct device_attribute dev_attr_hotkey_recommended_mask =
1714 __ATTR(hotkey_recommended_mask, S_IRUGO,
1715 hotkey_recommended_mask_show, NULL);
1716
1717 #ifdef CONFIG_THINKPAD_ACPI_HOTKEY_POLL
1718
1719 /* sysfs hotkey hotkey_source_mask ------------------------------------- */
1720 static ssize_t hotkey_source_mask_show(struct device *dev,
1721 struct device_attribute *attr,
1722 char *buf)
1723 {
1724 return snprintf(buf, PAGE_SIZE, "0x%08x\n", hotkey_source_mask);
1725 }
1726
1727 static ssize_t hotkey_source_mask_store(struct device *dev,
1728 struct device_attribute *attr,
1729 const char *buf, size_t count)
1730 {
1731 unsigned long t;
1732
1733 if (parse_strtoul(buf, 0xffffffffUL, &t) ||
1734 ((t & ~TPACPI_HKEY_NVRAM_KNOWN_MASK) != 0))
1735 return -EINVAL;
1736
1737 if (mutex_lock_interruptible(&hotkey_mutex))
1738 return -ERESTARTSYS;
1739
1740 HOTKEY_CONFIG_CRITICAL_START
1741 hotkey_source_mask = t;
1742 HOTKEY_CONFIG_CRITICAL_END
1743
1744 hotkey_poll_setup(1);
1745
1746 mutex_unlock(&hotkey_mutex);
1747
1748 return count;
1749 }
1750
1751 static struct device_attribute dev_attr_hotkey_source_mask =
1752 __ATTR(hotkey_source_mask, S_IWUSR | S_IRUGO,
1753 hotkey_source_mask_show, hotkey_source_mask_store);
1754
1755 /* sysfs hotkey hotkey_poll_freq --------------------------------------- */
1756 static ssize_t hotkey_poll_freq_show(struct device *dev,
1757 struct device_attribute *attr,
1758 char *buf)
1759 {
1760 return snprintf(buf, PAGE_SIZE, "%d\n", hotkey_poll_freq);
1761 }
1762
1763 static ssize_t hotkey_poll_freq_store(struct device *dev,
1764 struct device_attribute *attr,
1765 const char *buf, size_t count)
1766 {
1767 unsigned long t;
1768
1769 if (parse_strtoul(buf, 25, &t))
1770 return -EINVAL;
1771
1772 if (mutex_lock_interruptible(&hotkey_mutex))
1773 return -ERESTARTSYS;
1774
1775 hotkey_poll_freq = t;
1776
1777 hotkey_poll_setup(1);
1778 mutex_unlock(&hotkey_mutex);
1779
1780 return count;
1781 }
1782
1783 static struct device_attribute dev_attr_hotkey_poll_freq =
1784 __ATTR(hotkey_poll_freq, S_IWUSR | S_IRUGO,
1785 hotkey_poll_freq_show, hotkey_poll_freq_store);
1786
1787 #endif /* CONFIG_THINKPAD_ACPI_HOTKEY_POLL */
1788
1789 /* sysfs hotkey radio_sw (pollable) ------------------------------------ */
1790 static ssize_t hotkey_radio_sw_show(struct device *dev,
1791 struct device_attribute *attr,
1792 char *buf)
1793 {
1794 int res, s;
1795 res = hotkey_get_wlsw(&s);
1796 if (res < 0)
1797 return res;
1798
1799 return snprintf(buf, PAGE_SIZE, "%d\n", !!s);
1800 }
1801
1802 static struct device_attribute dev_attr_hotkey_radio_sw =
1803 __ATTR(hotkey_radio_sw, S_IRUGO, hotkey_radio_sw_show, NULL);
1804
1805 static void hotkey_radio_sw_notify_change(void)
1806 {
1807 if (tp_features.hotkey_wlsw)
1808 sysfs_notify(&tpacpi_pdev->dev.kobj, NULL,
1809 "hotkey_radio_sw");
1810 }
1811
1812 /* sysfs hotkey tablet mode (pollable) --------------------------------- */
1813 static ssize_t hotkey_tablet_mode_show(struct device *dev,
1814 struct device_attribute *attr,
1815 char *buf)
1816 {
1817 int res, s;
1818 res = hotkey_get_tablet_mode(&s);
1819 if (res < 0)
1820 return res;
1821
1822 return snprintf(buf, PAGE_SIZE, "%d\n", !!s);
1823 }
1824
1825 static struct device_attribute dev_attr_hotkey_tablet_mode =
1826 __ATTR(hotkey_tablet_mode, S_IRUGO, hotkey_tablet_mode_show, NULL);
1827
1828 static void hotkey_tablet_mode_notify_change(void)
1829 {
1830 if (tp_features.hotkey_tablet)
1831 sysfs_notify(&tpacpi_pdev->dev.kobj, NULL,
1832 "hotkey_tablet_mode");
1833 }
1834
1835 /* sysfs hotkey report_mode -------------------------------------------- */
1836 static ssize_t hotkey_report_mode_show(struct device *dev,
1837 struct device_attribute *attr,
1838 char *buf)
1839 {
1840 return snprintf(buf, PAGE_SIZE, "%d\n",
1841 (hotkey_report_mode != 0) ? hotkey_report_mode : 1);
1842 }
1843
1844 static struct device_attribute dev_attr_hotkey_report_mode =
1845 __ATTR(hotkey_report_mode, S_IRUGO, hotkey_report_mode_show, NULL);
1846
1847 /* sysfs wakeup reason (pollable) -------------------------------------- */
1848 static ssize_t hotkey_wakeup_reason_show(struct device *dev,
1849 struct device_attribute *attr,
1850 char *buf)
1851 {
1852 return snprintf(buf, PAGE_SIZE, "%d\n", hotkey_wakeup_reason);
1853 }
1854
1855 static struct device_attribute dev_attr_hotkey_wakeup_reason =
1856 __ATTR(wakeup_reason, S_IRUGO, hotkey_wakeup_reason_show, NULL);
1857
1858 static void hotkey_wakeup_reason_notify_change(void)
1859 {
1860 if (tp_features.hotkey_mask)
1861 sysfs_notify(&tpacpi_pdev->dev.kobj, NULL,
1862 "wakeup_reason");
1863 }
1864
1865 /* sysfs wakeup hotunplug_complete (pollable) -------------------------- */
1866 static ssize_t hotkey_wakeup_hotunplug_complete_show(struct device *dev,
1867 struct device_attribute *attr,
1868 char *buf)
1869 {
1870 return snprintf(buf, PAGE_SIZE, "%d\n", hotkey_autosleep_ack);
1871 }
1872
1873 static struct device_attribute dev_attr_hotkey_wakeup_hotunplug_complete =
1874 __ATTR(wakeup_hotunplug_complete, S_IRUGO,
1875 hotkey_wakeup_hotunplug_complete_show, NULL);
1876
1877 static void hotkey_wakeup_hotunplug_complete_notify_change(void)
1878 {
1879 if (tp_features.hotkey_mask)
1880 sysfs_notify(&tpacpi_pdev->dev.kobj, NULL,
1881 "wakeup_hotunplug_complete");
1882 }
1883
1884 /* --------------------------------------------------------------------- */
1885
1886 static struct attribute *hotkey_attributes[] __initdata = {
1887 &dev_attr_hotkey_enable.attr,
1888 &dev_attr_hotkey_bios_enabled.attr,
1889 &dev_attr_hotkey_report_mode.attr,
1890 #ifdef CONFIG_THINKPAD_ACPI_HOTKEY_POLL
1891 &dev_attr_hotkey_mask.attr,
1892 &dev_attr_hotkey_all_mask.attr,
1893 &dev_attr_hotkey_recommended_mask.attr,
1894 &dev_attr_hotkey_source_mask.attr,
1895 &dev_attr_hotkey_poll_freq.attr,
1896 #endif
1897 };
1898
1899 static struct attribute *hotkey_mask_attributes[] __initdata = {
1900 &dev_attr_hotkey_bios_mask.attr,
1901 #ifndef CONFIG_THINKPAD_ACPI_HOTKEY_POLL
1902 &dev_attr_hotkey_mask.attr,
1903 &dev_attr_hotkey_all_mask.attr,
1904 &dev_attr_hotkey_recommended_mask.attr,
1905 #endif
1906 &dev_attr_hotkey_wakeup_reason.attr,
1907 &dev_attr_hotkey_wakeup_hotunplug_complete.attr,
1908 };
1909
1910 static int __init hotkey_init(struct ibm_init_struct *iibm)
1911 {
1912 /* Requirements for changing the default keymaps:
1913 *
1914 * 1. Many of the keys are mapped to KEY_RESERVED for very
1915 * good reasons. Do not change them unless you have deep
1916 * knowledge on the IBM and Lenovo ThinkPad firmware for
1917 * the various ThinkPad models. The driver behaves
1918 * differently for KEY_RESERVED: such keys have their
1919 * hot key mask *unset* in mask_recommended, and also
1920 * in the initial hot key mask programmed into the
1921 * firmware at driver load time, which means the firm-
1922 * ware may react very differently if you change them to
1923 * something else;
1924 *
1925 * 2. You must be subscribed to the linux-thinkpad and
1926 * ibm-acpi-devel mailing lists, and you should read the
1927 * list archives since 2007 if you want to change the
1928 * keymaps. This requirement exists so that you will
1929 * know the past history of problems with the thinkpad-
1930 * acpi driver keymaps, and also that you will be
1931 * listening to any bug reports;
1932 *
1933 * 3. Do not send thinkpad-acpi specific patches directly to
1934 * for merging, *ever*. Send them to the linux-acpi
1935 * mailinglist for comments. Merging is to be done only
1936 * through acpi-test and the ACPI maintainer.
1937 *
1938 * If the above is too much to ask, don't change the keymap.
1939 * Ask the thinkpad-acpi maintainer to do it, instead.
1940 */
1941 static u16 ibm_keycode_map[] __initdata = {
1942 /* Scan Codes 0x00 to 0x0B: ACPI HKEY FN+F1..F12 */
1943 KEY_FN_F1, KEY_FN_F2, KEY_COFFEE, KEY_SLEEP,
1944 KEY_WLAN, KEY_FN_F6, KEY_SWITCHVIDEOMODE, KEY_FN_F8,
1945 KEY_FN_F9, KEY_FN_F10, KEY_FN_F11, KEY_SUSPEND,
1946
1947 /* Scan codes 0x0C to 0x1F: Other ACPI HKEY hot keys */
1948 KEY_UNKNOWN, /* 0x0C: FN+BACKSPACE */
1949 KEY_UNKNOWN, /* 0x0D: FN+INSERT */
1950 KEY_UNKNOWN, /* 0x0E: FN+DELETE */
1951
1952 /* brightness: firmware always reacts to them, unless
1953 * X.org did some tricks in the radeon BIOS scratch
1954 * registers of *some* models */
1955 KEY_RESERVED, /* 0x0F: FN+HOME (brightness up) */
1956 KEY_RESERVED, /* 0x10: FN+END (brightness down) */
1957
1958 /* Thinklight: firmware always react to it */
1959 KEY_RESERVED, /* 0x11: FN+PGUP (thinklight toggle) */
1960
1961 KEY_UNKNOWN, /* 0x12: FN+PGDOWN */
1962 KEY_ZOOM, /* 0x13: FN+SPACE (zoom) */
1963
1964 /* Volume: firmware always react to it and reprograms
1965 * the built-in *extra* mixer. Never map it to control
1966 * another mixer by default. */
1967 KEY_RESERVED, /* 0x14: VOLUME UP */
1968 KEY_RESERVED, /* 0x15: VOLUME DOWN */
1969 KEY_RESERVED, /* 0x16: MUTE */
1970
1971 KEY_VENDOR, /* 0x17: Thinkpad/AccessIBM/Lenovo */
1972
1973 /* (assignments unknown, please report if found) */
1974 KEY_UNKNOWN, KEY_UNKNOWN, KEY_UNKNOWN, KEY_UNKNOWN,
1975 KEY_UNKNOWN, KEY_UNKNOWN, KEY_UNKNOWN, KEY_UNKNOWN,
1976 };
1977 static u16 lenovo_keycode_map[] __initdata = {
1978 /* Scan Codes 0x00 to 0x0B: ACPI HKEY FN+F1..F12 */
1979 KEY_FN_F1, KEY_COFFEE, KEY_BATTERY, KEY_SLEEP,
1980 KEY_WLAN, KEY_FN_F6, KEY_SWITCHVIDEOMODE, KEY_FN_F8,
1981 KEY_FN_F9, KEY_FN_F10, KEY_FN_F11, KEY_SUSPEND,
1982
1983 /* Scan codes 0x0C to 0x1F: Other ACPI HKEY hot keys */
1984 KEY_UNKNOWN, /* 0x0C: FN+BACKSPACE */
1985 KEY_UNKNOWN, /* 0x0D: FN+INSERT */
1986 KEY_UNKNOWN, /* 0x0E: FN+DELETE */
1987
1988 /* These either have to go through ACPI video, or
1989 * act like in the IBM ThinkPads, so don't ever
1990 * enable them by default */
1991 KEY_RESERVED, /* 0x0F: FN+HOME (brightness up) */
1992 KEY_RESERVED, /* 0x10: FN+END (brightness down) */
1993
1994 KEY_RESERVED, /* 0x11: FN+PGUP (thinklight toggle) */
1995
1996 KEY_UNKNOWN, /* 0x12: FN+PGDOWN */
1997 KEY_ZOOM, /* 0x13: FN+SPACE (zoom) */
1998
1999 /* Volume: z60/z61, T60 (BIOS version?): firmware always
2000 * react to it and reprograms the built-in *extra* mixer.
2001 * Never map it to control another mixer by default.
2002 *
2003 * T60?, T61, R60?, R61: firmware and EC tries to send
2004 * these over the regular keyboard, so these are no-ops,
2005 * but there are still weird bugs re. MUTE, so do not
2006 * change unless you get test reports from all Lenovo
2007 * models. May cause the BIOS to interfere with the
2008 * HDA mixer.
2009 */
2010 KEY_RESERVED, /* 0x14: VOLUME UP */
2011 KEY_RESERVED, /* 0x15: VOLUME DOWN */
2012 KEY_RESERVED, /* 0x16: MUTE */
2013
2014 KEY_VENDOR, /* 0x17: Thinkpad/AccessIBM/Lenovo */
2015
2016 /* (assignments unknown, please report if found) */
2017 KEY_UNKNOWN, KEY_UNKNOWN, KEY_UNKNOWN, KEY_UNKNOWN,
2018 KEY_UNKNOWN, KEY_UNKNOWN, KEY_UNKNOWN, KEY_UNKNOWN,
2019 };
2020
2021 #define TPACPI_HOTKEY_MAP_LEN ARRAY_SIZE(ibm_keycode_map)
2022 #define TPACPI_HOTKEY_MAP_SIZE sizeof(ibm_keycode_map)
2023 #define TPACPI_HOTKEY_MAP_TYPESIZE sizeof(ibm_keycode_map[0])
2024
2025 int res, i;
2026 int status;
2027 int hkeyv;
2028
2029 vdbg_printk(TPACPI_DBG_INIT, "initializing hotkey subdriver\n");
2030
2031 BUG_ON(!tpacpi_inputdev);
2032 BUG_ON(tpacpi_inputdev->open != NULL ||
2033 tpacpi_inputdev->close != NULL);
2034
2035 TPACPI_ACPIHANDLE_INIT(hkey);
2036 mutex_init(&hotkey_mutex);
2037
2038 #ifdef CONFIG_THINKPAD_ACPI_HOTKEY_POLL
2039 mutex_init(&hotkey_thread_mutex);
2040 mutex_init(&hotkey_thread_data_mutex);
2041 #endif
2042
2043 /* hotkey not supported on 570 */
2044 tp_features.hotkey = hkey_handle != NULL;
2045
2046 vdbg_printk(TPACPI_DBG_INIT, "hotkeys are %s\n",
2047 str_supported(tp_features.hotkey));
2048
2049 if (tp_features.hotkey) {
2050 hotkey_dev_attributes = create_attr_set(13, NULL);
2051 if (!hotkey_dev_attributes)
2052 return -ENOMEM;
2053 res = add_many_to_attr_set(hotkey_dev_attributes,
2054 hotkey_attributes,
2055 ARRAY_SIZE(hotkey_attributes));
2056 if (res)
2057 return res;
2058
2059 /* mask not supported on 570, 600e/x, 770e, 770x, A21e, A2xm/p,
2060 A30, R30, R31, T20-22, X20-21, X22-24. Detected by checking
2061 for HKEY interface version 0x100 */
2062 if (acpi_evalf(hkey_handle, &hkeyv, "MHKV", "qd")) {
2063 if ((hkeyv >> 8) != 1) {
2064 printk(TPACPI_ERR "unknown version of the "
2065 "HKEY interface: 0x%x\n", hkeyv);
2066 printk(TPACPI_ERR "please report this to %s\n",
2067 TPACPI_MAIL);
2068 } else {
2069 /*
2070 * MHKV 0x100 in A31, R40, R40e,
2071 * T4x, X31, and later
2072 */
2073 tp_features.hotkey_mask = 1;
2074 }
2075 }
2076
2077 vdbg_printk(TPACPI_DBG_INIT, "hotkey masks are %s\n",
2078 str_supported(tp_features.hotkey_mask));
2079
2080 if (tp_features.hotkey_mask) {
2081 if (!acpi_evalf(hkey_handle, &hotkey_all_mask,
2082 "MHKA", "qd")) {
2083 printk(TPACPI_ERR
2084 "missing MHKA handler, "
2085 "please report this to %s\n",
2086 TPACPI_MAIL);
2087 /* FN+F12, FN+F4, FN+F3 */
2088 hotkey_all_mask = 0x080cU;
2089 }
2090 }
2091
2092 /* hotkey_source_mask *must* be zero for
2093 * the first hotkey_mask_get */
2094 res = hotkey_status_get(&hotkey_orig_status);
2095 if (!res && tp_features.hotkey_mask) {
2096 res = hotkey_mask_get();
2097 hotkey_orig_mask = hotkey_mask;
2098 if (!res) {
2099 res = add_many_to_attr_set(
2100 hotkey_dev_attributes,
2101 hotkey_mask_attributes,
2102 ARRAY_SIZE(hotkey_mask_attributes));
2103 }
2104 }
2105
2106 #ifdef CONFIG_THINKPAD_ACPI_HOTKEY_POLL
2107 if (tp_features.hotkey_mask) {
2108 hotkey_source_mask = TPACPI_HKEY_NVRAM_GOOD_MASK
2109 & ~hotkey_all_mask;
2110 } else {
2111 hotkey_source_mask = TPACPI_HKEY_NVRAM_GOOD_MASK;
2112 }
2113
2114 vdbg_printk(TPACPI_DBG_INIT,
2115 "hotkey source mask 0x%08x, polling freq %d\n",
2116 hotkey_source_mask, hotkey_poll_freq);
2117 #endif
2118
2119 /* Not all thinkpads have a hardware radio switch */
2120 if (!res && acpi_evalf(hkey_handle, &status, "WLSW", "qd")) {
2121 tp_features.hotkey_wlsw = 1;
2122 printk(TPACPI_INFO
2123 "radio switch found; radios are %s\n",
2124 enabled(status, 0));
2125 res = add_to_attr_set(hotkey_dev_attributes,
2126 &dev_attr_hotkey_radio_sw.attr);
2127 }
2128
2129 /* For X41t, X60t, X61t Tablets... */
2130 if (!res && acpi_evalf(hkey_handle, &status, "MHKG", "qd")) {
2131 tp_features.hotkey_tablet = 1;
2132 printk(TPACPI_INFO
2133 "possible tablet mode switch found; "
2134 "ThinkPad in %s mode\n",
2135 (status & TP_HOTKEY_TABLET_MASK)?
2136 "tablet" : "laptop");
2137 res = add_to_attr_set(hotkey_dev_attributes,
2138 &dev_attr_hotkey_tablet_mode.attr);
2139 }
2140
2141 if (!res)
2142 res = register_attr_set_with_sysfs(
2143 hotkey_dev_attributes,
2144 &tpacpi_pdev->dev.kobj);
2145 if (res)
2146 return res;
2147
2148 /* Set up key map */
2149
2150 hotkey_keycode_map = kmalloc(TPACPI_HOTKEY_MAP_SIZE,
2151 GFP_KERNEL);
2152 if (!hotkey_keycode_map) {
2153 printk(TPACPI_ERR
2154 "failed to allocate memory for key map\n");
2155 return -ENOMEM;
2156 }
2157
2158 if (thinkpad_id.vendor == PCI_VENDOR_ID_LENOVO) {
2159 dbg_printk(TPACPI_DBG_INIT,
2160 "using Lenovo default hot key map\n");
2161 memcpy(hotkey_keycode_map, &lenovo_keycode_map,
2162 TPACPI_HOTKEY_MAP_SIZE);
2163 } else {
2164 dbg_printk(TPACPI_DBG_INIT,
2165 "using IBM default hot key map\n");
2166 memcpy(hotkey_keycode_map, &ibm_keycode_map,
2167 TPACPI_HOTKEY_MAP_SIZE);
2168 }
2169
2170 set_bit(EV_KEY, tpacpi_inputdev->evbit);
2171 set_bit(EV_MSC, tpacpi_inputdev->evbit);
2172 set_bit(MSC_SCAN, tpacpi_inputdev->mscbit);
2173 tpacpi_inputdev->keycodesize = TPACPI_HOTKEY_MAP_TYPESIZE;
2174 tpacpi_inputdev->keycodemax = TPACPI_HOTKEY_MAP_LEN;
2175 tpacpi_inputdev->keycode = hotkey_keycode_map;
2176 for (i = 0; i < TPACPI_HOTKEY_MAP_LEN; i++) {
2177 if (hotkey_keycode_map[i] != KEY_RESERVED) {
2178 set_bit(hotkey_keycode_map[i],
2179 tpacpi_inputdev->keybit);
2180 } else {
2181 if (i < sizeof(hotkey_reserved_mask)*8)
2182 hotkey_reserved_mask |= 1 << i;
2183 }
2184 }
2185
2186 if (tp_features.hotkey_wlsw) {
2187 set_bit(EV_SW, tpacpi_inputdev->evbit);
2188 set_bit(SW_RADIO, tpacpi_inputdev->swbit);
2189 }
2190 if (tp_features.hotkey_tablet) {
2191 set_bit(EV_SW, tpacpi_inputdev->evbit);
2192 set_bit(SW_TABLET_MODE, tpacpi_inputdev->swbit);
2193 }
2194
2195 /* Do not issue duplicate brightness change events to
2196 * userspace */
2197 if (!tp_features.bright_acpimode)
2198 /* update bright_acpimode... */
2199 tpacpi_check_std_acpi_brightness_support();
2200
2201 if (tp_features.bright_acpimode) {
2202 printk(TPACPI_INFO
2203 "This ThinkPad has standard ACPI backlight "
2204 "brightness control, supported by the ACPI "
2205 "video driver\n");
2206 printk(TPACPI_NOTICE
2207 "Disabling thinkpad-acpi brightness events "
2208 "by default...\n");
2209
2210 /* The hotkey_reserved_mask change below is not
2211 * necessary while the keys are at KEY_RESERVED in the
2212 * default map, but better safe than sorry, leave it
2213 * here as a marker of what we have to do, especially
2214 * when we finally become able to set this at runtime
2215 * on response to X.org requests */
2216 hotkey_reserved_mask |=
2217 (1 << TP_ACPI_HOTKEYSCAN_FNHOME)
2218 | (1 << TP_ACPI_HOTKEYSCAN_FNEND);
2219 }
2220
2221 dbg_printk(TPACPI_DBG_INIT,
2222 "enabling hot key handling\n");
2223 res = hotkey_status_set(1);
2224 if (res)
2225 return res;
2226 res = hotkey_mask_set(((hotkey_all_mask | hotkey_source_mask)
2227 & ~hotkey_reserved_mask)
2228 | hotkey_orig_mask);
2229 if (res < 0 && res != -ENXIO)
2230 return res;
2231
2232 dbg_printk(TPACPI_DBG_INIT,
2233 "legacy hot key reporting over procfs %s\n",
2234 (hotkey_report_mode < 2) ?
2235 "enabled" : "disabled");
2236
2237 tpacpi_inputdev->open = &hotkey_inputdev_open;
2238 tpacpi_inputdev->close = &hotkey_inputdev_close;
2239
2240 hotkey_poll_setup_safe(1);
2241 tpacpi_input_send_radiosw();
2242 tpacpi_input_send_tabletsw();
2243 }
2244
2245 return (tp_features.hotkey)? 0 : 1;
2246 }
2247
2248 static void hotkey_exit(void)
2249 {
2250 #ifdef CONFIG_THINKPAD_ACPI_HOTKEY_POLL
2251 hotkey_poll_stop_sync();
2252 #endif
2253
2254 if (tp_features.hotkey) {
2255 dbg_printk(TPACPI_DBG_EXIT,
2256 "restoring original hot key mask\n");
2257 /* no short-circuit boolean operator below! */
2258 if ((hotkey_mask_set(hotkey_orig_mask) |
2259 hotkey_status_set(hotkey_orig_status)) != 0)
2260 printk(TPACPI_ERR
2261 "failed to restore hot key mask "
2262 "to BIOS defaults\n");
2263 }
2264
2265 if (hotkey_dev_attributes) {
2266 delete_attr_set(hotkey_dev_attributes, &tpacpi_pdev->dev.kobj);
2267 hotkey_dev_attributes = NULL;
2268 }
2269 }
2270
2271 static void hotkey_notify(struct ibm_struct *ibm, u32 event)
2272 {
2273 u32 hkey;
2274 unsigned int scancode;
2275 int send_acpi_ev;
2276 int ignore_acpi_ev;
2277 int unk_ev;
2278
2279 if (event != 0x80) {
2280 printk(TPACPI_ERR
2281 "unknown HKEY notification event %d\n", event);
2282 /* forward it to userspace, maybe it knows how to handle it */
2283 acpi_bus_generate_netlink_event(
2284 ibm->acpi->device->pnp.device_class,
2285 ibm->acpi->device->dev.bus_id,
2286 event, 0);
2287 return;
2288 }
2289
2290 while (1) {
2291 if (!acpi_evalf(hkey_handle, &hkey, "MHKP", "d")) {
2292 printk(TPACPI_ERR "failed to retrieve HKEY event\n");
2293 return;
2294 }
2295
2296 if (hkey == 0) {
2297 /* queue empty */
2298 return;
2299 }
2300
2301 send_acpi_ev = 1;
2302 ignore_acpi_ev = 0;
2303 unk_ev = 0;
2304
2305 switch (hkey >> 12) {
2306 case 1:
2307 /* 0x1000-0x1FFF: key presses */
2308 scancode = hkey & 0xfff;
2309 if (scancode > 0 && scancode < 0x21) {
2310 scancode--;
2311 if (!(hotkey_source_mask & (1 << scancode))) {
2312 tpacpi_input_send_key(scancode);
2313 send_acpi_ev = 0;
2314 } else {
2315 ignore_acpi_ev = 1;
2316 }
2317 } else {
2318 unk_ev = 1;
2319 }
2320 break;
2321 case 2:
2322 /* Wakeup reason */
2323 switch (hkey) {
2324 case 0x2304: /* suspend, undock */
2325 case 0x2404: /* hibernation, undock */
2326 hotkey_wakeup_reason = TP_ACPI_WAKEUP_UNDOCK;
2327 ignore_acpi_ev = 1;
2328 break;
2329 case 0x2305: /* suspend, bay eject */
2330 case 0x2405: /* hibernation, bay eject */
2331 hotkey_wakeup_reason = TP_ACPI_WAKEUP_BAYEJ;
2332 ignore_acpi_ev = 1;
2333 break;
2334 default:
2335 unk_ev = 1;
2336 }
2337 if (hotkey_wakeup_reason != TP_ACPI_WAKEUP_NONE) {
2338 printk(TPACPI_INFO
2339 "woke up due to a hot-unplug "
2340 "request...\n");
2341 hotkey_wakeup_reason_notify_change();
2342 }
2343 break;
2344 case 3:
2345 /* bay-related wakeups */
2346 if (hkey == 0x3003) {
2347 hotkey_autosleep_ack = 1;
2348 printk(TPACPI_INFO
2349 "bay ejected\n");
2350 hotkey_wakeup_hotunplug_complete_notify_change();
2351 } else {
2352 unk_ev = 1;
2353 }
2354 break;
2355 case 4:
2356 /* dock-related wakeups */
2357 if (hkey == 0x4003) {
2358 hotkey_autosleep_ack = 1;
2359 printk(TPACPI_INFO
2360 "undocked\n");
2361 hotkey_wakeup_hotunplug_complete_notify_change();
2362 } else {
2363 unk_ev = 1;
2364 }
2365 break;
2366 case 5:
2367 /* 0x5000-0x5FFF: human interface helpers */
2368 switch (hkey) {
2369 case 0x5010: /* Lenovo new BIOS: brightness changed */
2370 case 0x500b: /* X61t: tablet pen inserted into bay */
2371 case 0x500c: /* X61t: tablet pen removed from bay */
2372 break;
2373 case 0x5009: /* X41t-X61t: swivel up (tablet mode) */
2374 case 0x500a: /* X41t-X61t: swivel down (normal mode) */
2375 tpacpi_input_send_tabletsw();
2376 hotkey_tablet_mode_notify_change();
2377 send_acpi_ev = 0;
2378 break;
2379 case 0x5001:
2380 case 0x5002:
2381 /* LID switch events. Do not propagate */
2382 ignore_acpi_ev = 1;
2383 break;
2384 default:
2385 unk_ev = 1;
2386 }
2387 break;
2388 case 7:
2389 /* 0x7000-0x7FFF: misc */
2390 if (tp_features.hotkey_wlsw && hkey == 0x7000) {
2391 tpacpi_input_send_radiosw();
2392 hotkey_radio_sw_notify_change();
2393 send_acpi_ev = 0;
2394 break;
2395 }
2396 /* fallthrough to default */
2397 default:
2398 unk_ev = 1;
2399 }
2400 if (unk_ev) {
2401 printk(TPACPI_NOTICE
2402 "unhandled HKEY event 0x%04x\n", hkey);
2403 }
2404
2405 /* Legacy events */
2406 if (!ignore_acpi_ev &&
2407 (send_acpi_ev || hotkey_report_mode < 2)) {
2408 acpi_bus_generate_proc_event(ibm->acpi->device,
2409 event, hkey);
2410 }
2411
2412 /* netlink events */
2413 if (!ignore_acpi_ev && send_acpi_ev) {
2414 acpi_bus_generate_netlink_event(
2415 ibm->acpi->device->pnp.device_class,
2416 ibm->acpi->device->dev.bus_id,
2417 event, hkey);
2418 }
2419 }
2420 }
2421
2422 static void hotkey_suspend(pm_message_t state)
2423 {
2424 /* Do these on suspend, we get the events on early resume! */
2425 hotkey_wakeup_reason = TP_ACPI_WAKEUP_NONE;
2426 hotkey_autosleep_ack = 0;
2427 }
2428
2429 static void hotkey_resume(void)
2430 {
2431 if (hotkey_mask_get())
2432 printk(TPACPI_ERR
2433 "error while trying to read hot key mask "
2434 "from firmware\n");
2435 tpacpi_input_send_radiosw();
2436 hotkey_radio_sw_notify_change();
2437 hotkey_tablet_mode_notify_change();
2438 hotkey_wakeup_reason_notify_change();
2439 hotkey_wakeup_hotunplug_complete_notify_change();
2440 hotkey_poll_setup_safe(0);
2441 }
2442
2443 /* procfs -------------------------------------------------------------- */
2444 static int hotkey_read(char *p)
2445 {
2446 int res, status;
2447 int len = 0;
2448
2449 if (!tp_features.hotkey) {
2450 len += sprintf(p + len, "status:\t\tnot supported\n");
2451 return len;
2452 }
2453
2454 if (mutex_lock_interruptible(&hotkey_mutex))
2455 return -ERESTARTSYS;
2456 res = hotkey_status_get(&status);
2457 if (!res)
2458 res = hotkey_mask_get();
2459 mutex_unlock(&hotkey_mutex);
2460 if (res)
2461 return res;
2462
2463 len += sprintf(p + len, "status:\t\t%s\n", enabled(status, 0));
2464 if (tp_features.hotkey_mask) {
2465 len += sprintf(p + len, "mask:\t\t0x%08x\n", hotkey_mask);
2466 len += sprintf(p + len,
2467 "commands:\tenable, disable, reset, <mask>\n");
2468 } else {
2469 len += sprintf(p + len, "mask:\t\tnot supported\n");
2470 len += sprintf(p + len, "commands:\tenable, disable, reset\n");
2471 }
2472
2473 return len;
2474 }
2475
2476 static int hotkey_write(char *buf)
2477 {
2478 int res, status;
2479 u32 mask;
2480 char *cmd;
2481
2482 if (!tp_features.hotkey)
2483 return -ENODEV;
2484
2485 if (mutex_lock_interruptible(&hotkey_mutex))
2486 return -ERESTARTSYS;
2487
2488 status = -1;
2489 mask = hotkey_mask;
2490
2491 res = 0;
2492 while ((cmd = next_cmd(&buf))) {
2493 if (strlencmp(cmd, "enable") == 0) {
2494 status = 1;
2495 } else if (strlencmp(cmd, "disable") == 0) {
2496 status = 0;
2497 } else if (strlencmp(cmd, "reset") == 0) {
2498 status = hotkey_orig_status;
2499 mask = hotkey_orig_mask;
2500 } else if (sscanf(cmd, "0x%x", &mask) == 1) {
2501 /* mask set */
2502 } else if (sscanf(cmd, "%x", &mask) == 1) {
2503 /* mask set */
2504 } else {
2505 res = -EINVAL;
2506 goto errexit;
2507 }
2508 }
2509 if (status != -1)
2510 res = hotkey_status_set(status);
2511
2512 if (!res && mask != hotkey_mask)
2513 res = hotkey_mask_set(mask);
2514
2515 errexit:
2516 mutex_unlock(&hotkey_mutex);
2517 return res;
2518 }
2519
2520 static const struct acpi_device_id ibm_htk_device_ids[] = {
2521 {TPACPI_ACPI_HKEY_HID, 0},
2522 {"", 0},
2523 };
2524
2525 static struct tp_acpi_drv_struct ibm_hotkey_acpidriver = {
2526 .hid = ibm_htk_device_ids,
2527 .notify = hotkey_notify,
2528 .handle = &hkey_handle,
2529 .type = ACPI_DEVICE_NOTIFY,
2530 };
2531
2532 static struct ibm_struct hotkey_driver_data = {
2533 .name = "hotkey",
2534 .read = hotkey_read,
2535 .write = hotkey_write,
2536 .exit = hotkey_exit,
2537 .resume = hotkey_resume,
2538 .suspend = hotkey_suspend,
2539 .acpi = &ibm_hotkey_acpidriver,
2540 };
2541
2542 /*************************************************************************
2543 * Bluetooth subdriver
2544 */
2545
2546 enum {
2547 /* ACPI GBDC/SBDC bits */
2548 TP_ACPI_BLUETOOTH_HWPRESENT = 0x01, /* Bluetooth hw available */
2549 TP_ACPI_BLUETOOTH_RADIOSSW = 0x02, /* Bluetooth radio enabled */
2550 TP_ACPI_BLUETOOTH_UNK = 0x04, /* unknown function */
2551 };
2552
2553 static int bluetooth_get_radiosw(void);
2554 static int bluetooth_set_radiosw(int radio_on);
2555
2556 /* sysfs bluetooth enable ---------------------------------------------- */
2557 static ssize_t bluetooth_enable_show(struct device *dev,
2558 struct device_attribute *attr,
2559 char *buf)
2560 {
2561 int status;
2562
2563 status = bluetooth_get_radiosw();
2564 if (status < 0)
2565 return status;
2566
2567 return snprintf(buf, PAGE_SIZE, "%d\n", status ? 1 : 0);
2568 }
2569
2570 static ssize_t bluetooth_enable_store(struct device *dev,
2571 struct device_attribute *attr,
2572 const char *buf, size_t count)
2573 {
2574 unsigned long t;
2575 int res;
2576
2577 if (parse_strtoul(buf, 1, &t))
2578 return -EINVAL;
2579
2580 res = bluetooth_set_radiosw(t);
2581
2582 return (res) ? res : count;
2583 }
2584
2585 static struct device_attribute dev_attr_bluetooth_enable =
2586 __ATTR(bluetooth_enable, S_IWUSR | S_IRUGO,
2587 bluetooth_enable_show, bluetooth_enable_store);
2588
2589 /* --------------------------------------------------------------------- */
2590
2591 static struct attribute *bluetooth_attributes[] = {
2592 &dev_attr_bluetooth_enable.attr,
2593 NULL
2594 };
2595
2596 static const struct attribute_group bluetooth_attr_group = {
2597 .attrs = bluetooth_attributes,
2598 };
2599
2600 static int __init bluetooth_init(struct ibm_init_struct *iibm)
2601 {
2602 int res;
2603 int status = 0;
2604
2605 vdbg_printk(TPACPI_DBG_INIT, "initializing bluetooth subdriver\n");
2606
2607 TPACPI_ACPIHANDLE_INIT(hkey);
2608
2609 /* bluetooth not supported on 570, 600e/x, 770e, 770x, A21e, A2xm/p,
2610 G4x, R30, R31, R40e, R50e, T20-22, X20-21 */
2611 tp_features.bluetooth = hkey_handle &&
2612 acpi_evalf(hkey_handle, &status, "GBDC", "qd");
2613
2614 vdbg_printk(TPACPI_DBG_INIT, "bluetooth is %s, status 0x%02x\n",
2615 str_supported(tp_features.bluetooth),
2616 status);
2617
2618 if (tp_features.bluetooth) {
2619 if (!(status & TP_ACPI_BLUETOOTH_HWPRESENT)) {
2620 /* no bluetooth hardware present in system */
2621 tp_features.bluetooth = 0;
2622 dbg_printk(TPACPI_DBG_INIT,
2623 "bluetooth hardware not installed\n");
2624 } else {
2625 res = sysfs_create_group(&tpacpi_pdev->dev.kobj,
2626 &bluetooth_attr_group);
2627 if (res)
2628 return res;
2629 }
2630 }
2631
2632 return (tp_features.bluetooth)? 0 : 1;
2633 }
2634
2635 static void bluetooth_exit(void)
2636 {
2637 sysfs_remove_group(&tpacpi_pdev->dev.kobj,
2638 &bluetooth_attr_group);
2639 }
2640
2641 static int bluetooth_get_radiosw(void)
2642 {
2643 int status;
2644
2645 if (!tp_features.bluetooth)
2646 return -ENODEV;
2647
2648 if (!acpi_evalf(hkey_handle, &status, "GBDC", "d"))
2649 return -EIO;
2650
2651 return ((status & TP_ACPI_BLUETOOTH_RADIOSSW) != 0);
2652 }
2653
2654 static int bluetooth_set_radiosw(int radio_on)
2655 {
2656 int status;
2657
2658 if (!tp_features.bluetooth)
2659 return -ENODEV;
2660
2661 if (!acpi_evalf(hkey_handle, &status, "GBDC", "d"))
2662 return -EIO;
2663 if (radio_on)
2664 status |= TP_ACPI_BLUETOOTH_RADIOSSW;
2665 else
2666 status &= ~TP_ACPI_BLUETOOTH_RADIOSSW;
2667 if (!acpi_evalf(hkey_handle, NULL, "SBDC", "vd", status))
2668 return -EIO;
2669
2670 return 0;
2671 }
2672
2673 /* procfs -------------------------------------------------------------- */
2674 static int bluetooth_read(char *p)
2675 {
2676 int len = 0;
2677 int status = bluetooth_get_radiosw();
2678
2679 if (!tp_features.bluetooth)
2680 len += sprintf(p + len, "status:\t\tnot supported\n");
2681 else {
2682 len += sprintf(p + len, "status:\t\t%s\n",
2683 (status)? "enabled" : "disabled");
2684 len += sprintf(p + len, "commands:\tenable, disable\n");
2685 }
2686
2687 return len;
2688 }
2689
2690 static int bluetooth_write(char *buf)
2691 {
2692 char *cmd;
2693
2694 if (!tp_features.bluetooth)
2695 return -ENODEV;
2696
2697 while ((cmd = next_cmd(&buf))) {
2698 if (strlencmp(cmd, "enable") == 0) {
2699 bluetooth_set_radiosw(1);
2700 } else if (strlencmp(cmd, "disable") == 0) {
2701 bluetooth_set_radiosw(0);
2702 } else
2703 return -EINVAL;
2704 }
2705
2706 return 0;
2707 }
2708
2709 static struct ibm_struct bluetooth_driver_data = {
2710 .name = "bluetooth",
2711 .read = bluetooth_read,
2712 .write = bluetooth_write,
2713 .exit = bluetooth_exit,
2714 };
2715
2716 /*************************************************************************
2717 * Wan subdriver
2718 */
2719
2720 enum {
2721 /* ACPI GWAN/SWAN bits */
2722 TP_ACPI_WANCARD_HWPRESENT = 0x01, /* Wan hw available */
2723 TP_ACPI_WANCARD_RADIOSSW = 0x02, /* Wan radio enabled */
2724 TP_ACPI_WANCARD_UNK = 0x04, /* unknown function */
2725 };
2726
2727 static int wan_get_radiosw(void);
2728 static int wan_set_radiosw(int radio_on);
2729
2730 /* sysfs wan enable ---------------------------------------------------- */
2731 static ssize_t wan_enable_show(struct device *dev,
2732 struct device_attribute *attr,
2733 char *buf)
2734 {
2735 int status;
2736
2737 status = wan_get_radiosw();
2738 if (status < 0)
2739 return status;
2740
2741 return snprintf(buf, PAGE_SIZE, "%d\n", status ? 1 : 0);
2742 }
2743
2744 static ssize_t wan_enable_store(struct device *dev,
2745 struct device_attribute *attr,
2746 const char *buf, size_t count)
2747 {
2748 unsigned long t;
2749 int res;
2750
2751 if (parse_strtoul(buf, 1, &t))
2752 return -EINVAL;
2753
2754 res = wan_set_radiosw(t);
2755
2756 return (res) ? res : count;
2757 }
2758
2759 static struct device_attribute dev_attr_wan_enable =
2760 __ATTR(wwan_enable, S_IWUSR | S_IRUGO,
2761 wan_enable_show, wan_enable_store);
2762
2763 /* --------------------------------------------------------------------- */
2764
2765 static struct attribute *wan_attributes[] = {
2766 &dev_attr_wan_enable.attr,
2767 NULL
2768 };
2769
2770 static const struct attribute_group wan_attr_group = {
2771 .attrs = wan_attributes,
2772 };
2773
2774 static int __init wan_init(struct ibm_init_struct *iibm)
2775 {
2776 int res;
2777 int status = 0;
2778
2779 vdbg_printk(TPACPI_DBG_INIT, "initializing wan subdriver\n");
2780
2781 TPACPI_ACPIHANDLE_INIT(hkey);
2782
2783 tp_features.wan = hkey_handle &&
2784 acpi_evalf(hkey_handle, &status, "GWAN", "qd");
2785
2786 vdbg_printk(TPACPI_DBG_INIT, "wan is %s, status 0x%02x\n",
2787 str_supported(tp_features.wan),
2788 status);
2789
2790 if (tp_features.wan) {
2791 if (!(status & TP_ACPI_WANCARD_HWPRESENT)) {
2792 /* no wan hardware present in system */
2793 tp_features.wan = 0;
2794 dbg_printk(TPACPI_DBG_INIT,
2795 "wan hardware not installed\n");
2796 } else {
2797 res = sysfs_create_group(&tpacpi_pdev->dev.kobj,
2798 &wan_attr_group);
2799 if (res)
2800 return res;
2801 }
2802 }
2803
2804 return (tp_features.wan)? 0 : 1;
2805 }
2806
2807 static void wan_exit(void)
2808 {
2809 sysfs_remove_group(&tpacpi_pdev->dev.kobj,
2810 &wan_attr_group);
2811 }
2812
2813 static int wan_get_radiosw(void)
2814 {
2815 int status;
2816
2817 if (!tp_features.wan)
2818 return -ENODEV;
2819
2820 if (!acpi_evalf(hkey_handle, &status, "GWAN", "d"))
2821 return -EIO;
2822
2823 return ((status & TP_ACPI_WANCARD_RADIOSSW) != 0);
2824 }
2825
2826 static int wan_set_radiosw(int radio_on)
2827 {
2828 int status;
2829
2830 if (!tp_features.wan)
2831 return -ENODEV;
2832
2833 if (!acpi_evalf(hkey_handle, &status, "GWAN", "d"))
2834 return -EIO;
2835 if (radio_on)
2836 status |= TP_ACPI_WANCARD_RADIOSSW;
2837 else
2838 status &= ~TP_ACPI_WANCARD_RADIOSSW;
2839 if (!acpi_evalf(hkey_handle, NULL, "SWAN", "vd", status))
2840 return -EIO;
2841
2842 return 0;
2843 }
2844
2845 /* procfs -------------------------------------------------------------- */
2846 static int wan_read(char *p)
2847 {
2848 int len = 0;
2849 int status = wan_get_radiosw();
2850
2851 if (!tp_features.wan)
2852 len += sprintf(p + len, "status:\t\tnot supported\n");
2853 else {
2854 len += sprintf(p + len, "status:\t\t%s\n",
2855 (status)? "enabled" : "disabled");
2856 len += sprintf(p + len, "commands:\tenable, disable\n");
2857 }
2858
2859 return len;
2860 }
2861
2862 static int wan_write(char *buf)
2863 {
2864 char *cmd;
2865
2866 if (!tp_features.wan)
2867 return -ENODEV;
2868
2869 while ((cmd = next_cmd(&buf))) {
2870 if (strlencmp(cmd, "enable") == 0) {
2871 wan_set_radiosw(1);
2872 } else if (strlencmp(cmd, "disable") == 0) {
2873 wan_set_radiosw(0);
2874 } else
2875 return -EINVAL;
2876 }
2877
2878 return 0;
2879 }
2880
2881 static struct ibm_struct wan_driver_data = {
2882 .name = "wan",
2883 .read = wan_read,
2884 .write = wan_write,
2885 .exit = wan_exit,
2886 .flags.experimental = 1,
2887 };
2888
2889 /*************************************************************************
2890 * Video subdriver
2891 */
2892
2893 #ifdef CONFIG_THINKPAD_ACPI_VIDEO
2894
2895 enum video_access_mode {
2896 TPACPI_VIDEO_NONE = 0,
2897 TPACPI_VIDEO_570, /* 570 */
2898 TPACPI_VIDEO_770, /* 600e/x, 770e, 770x */
2899 TPACPI_VIDEO_NEW, /* all others */
2900 };
2901
2902 enum { /* video status flags, based on VIDEO_570 */
2903 TP_ACPI_VIDEO_S_LCD = 0x01, /* LCD output enabled */
2904 TP_ACPI_VIDEO_S_CRT = 0x02, /* CRT output enabled */
2905 TP_ACPI_VIDEO_S_DVI = 0x08, /* DVI output enabled */
2906 };
2907
2908 enum { /* TPACPI_VIDEO_570 constants */
2909 TP_ACPI_VIDEO_570_PHSCMD = 0x87, /* unknown magic constant :( */
2910 TP_ACPI_VIDEO_570_PHSMASK = 0x03, /* PHS bits that map to
2911 * video_status_flags */
2912 TP_ACPI_VIDEO_570_PHS2CMD = 0x8b, /* unknown magic constant :( */
2913 TP_ACPI_VIDEO_570_PHS2SET = 0x80, /* unknown magic constant :( */
2914 };
2915
2916 static enum video_access_mode video_supported;
2917 static int video_orig_autosw;
2918
2919 static int video_autosw_get(void);
2920 static int video_autosw_set(int enable);
2921
2922 TPACPI_HANDLE(vid2, root, "\\_SB.PCI0.AGPB.VID"); /* G41 */
2923
2924 static int __init video_init(struct ibm_init_struct *iibm)
2925 {
2926 int ivga;
2927
2928 vdbg_printk(TPACPI_DBG_INIT, "initializing video subdriver\n");
2929
2930 TPACPI_ACPIHANDLE_INIT(vid);
2931 TPACPI_ACPIHANDLE_INIT(vid2);
2932
2933 if (vid2_handle && acpi_evalf(NULL, &ivga, "\\IVGA", "d") && ivga)
2934 /* G41, assume IVGA doesn't change */
2935 vid_handle = vid2_handle;
2936
2937 if (!vid_handle)
2938 /* video switching not supported on R30, R31 */
2939 video_supported = TPACPI_VIDEO_NONE;
2940 else if (acpi_evalf(vid_handle, &video_orig_autosw, "SWIT", "qd"))
2941 /* 570 */
2942 video_supported = TPACPI_VIDEO_570;
2943 else if (acpi_evalf(vid_handle, &video_orig_autosw, "^VADL", "qd"))
2944 /* 600e/x, 770e, 770x */
2945 video_supported = TPACPI_VIDEO_770;
2946 else
2947 /* all others */
2948 video_supported = TPACPI_VIDEO_NEW;
2949
2950 vdbg_printk(TPACPI_DBG_INIT, "video is %s, mode %d\n",
2951 str_supported(video_supported != TPACPI_VIDEO_NONE),
2952 video_supported);
2953
2954 return (video_supported != TPACPI_VIDEO_NONE)? 0 : 1;
2955 }
2956
2957 static void video_exit(void)
2958 {
2959 dbg_printk(TPACPI_DBG_EXIT,
2960 "restoring original video autoswitch mode\n");
2961 if (video_autosw_set(video_orig_autosw))
2962 printk(TPACPI_ERR "error while trying to restore original "
2963 "video autoswitch mode\n");
2964 }
2965
2966 static int video_outputsw_get(void)
2967 {
2968 int status = 0;
2969 int i;
2970
2971 switch (video_supported) {
2972 case TPACPI_VIDEO_570:
2973 if (!acpi_evalf(NULL, &i, "\\_SB.PHS", "dd",
2974 TP_ACPI_VIDEO_570_PHSCMD))
2975 return -EIO;
2976 status = i & TP_ACPI_VIDEO_570_PHSMASK;
2977 break;
2978 case TPACPI_VIDEO_770:
2979 if (!acpi_evalf(NULL, &i, "\\VCDL", "d"))
2980 return -EIO;
2981 if (i)
2982 status |= TP_ACPI_VIDEO_S_LCD;
2983 if (!acpi_evalf(NULL, &i, "\\VCDC", "d"))
2984 return -EIO;
2985 if (i)
2986 status |= TP_ACPI_VIDEO_S_CRT;
2987 break;
2988 case TPACPI_VIDEO_NEW:
2989 if (!acpi_evalf(NULL, NULL, "\\VUPS", "vd", 1) ||
2990 !acpi_evalf(NULL, &i, "\\VCDC", "d"))
2991 return -EIO;
2992 if (i)
2993 status |= TP_ACPI_VIDEO_S_CRT;
2994
2995 if (!acpi_evalf(NULL, NULL, "\\VUPS", "vd", 0) ||
2996 !acpi_evalf(NULL, &i, "\\VCDL", "d"))
2997 return -EIO;
2998 if (i)
2999 status |= TP_ACPI_VIDEO_S_LCD;
3000 if (!acpi_evalf(NULL, &i, "\\VCDD", "d"))
3001 return -EIO;
3002 if (i)
3003 status |= TP_ACPI_VIDEO_S_DVI;
3004 break;
3005 default:
3006 return -ENOSYS;
3007 }
3008
3009 return status;
3010 }
3011
3012 static int video_outputsw_set(int status)
3013 {
3014 int autosw;
3015 int res = 0;
3016
3017 switch (video_supported) {
3018 case TPACPI_VIDEO_570:
3019 res = acpi_evalf(NULL, NULL,
3020 "\\_SB.PHS2", "vdd",
3021 TP_ACPI_VIDEO_570_PHS2CMD,
3022 status | TP_ACPI_VIDEO_570_PHS2SET);
3023 break;
3024 case TPACPI_VIDEO_770:
3025 autosw = video_autosw_get();
3026 if (autosw < 0)
3027 return autosw;
3028
3029 res = video_autosw_set(1);
3030 if (res)
3031 return res;
3032 res = acpi_evalf(vid_handle, NULL,
3033 "ASWT", "vdd", status * 0x100, 0);
3034 if (!autosw && video_autosw_set(autosw)) {
3035 printk(TPACPI_ERR
3036 "video auto-switch left enabled due to error\n");
3037 return -EIO;
3038 }
3039 break;
3040 case TPACPI_VIDEO_NEW:
3041 res = acpi_evalf(NULL, NULL, "\\VUPS", "vd", 0x80) &&
3042 acpi_evalf(NULL, NULL, "\\VSDS", "vdd", status, 1);
3043 break;
3044 default:
3045 return -ENOSYS;
3046 }
3047
3048 return (res)? 0 : -EIO;
3049 }
3050
3051 static int video_autosw_get(void)
3052 {
3053 int autosw = 0;
3054
3055 switch (video_supported) {
3056 case TPACPI_VIDEO_570:
3057 if (!acpi_evalf(vid_handle, &autosw, "SWIT", "d"))
3058 return -EIO;
3059 break;
3060 case TPACPI_VIDEO_770:
3061 case TPACPI_VIDEO_NEW:
3062 if (!acpi_evalf(vid_handle, &autosw, "^VDEE", "d"))
3063 return -EIO;
3064 break;
3065 default:
3066 return -ENOSYS;
3067 }
3068
3069 return autosw & 1;
3070 }
3071
3072 static int video_autosw_set(int enable)
3073 {
3074 if (!acpi_evalf(vid_handle, NULL, "_DOS", "vd", (enable)? 1 : 0))
3075 return -EIO;
3076 return 0;
3077 }
3078
3079 static int video_outputsw_cycle(void)
3080 {
3081 int autosw = video_autosw_get();
3082 int res;
3083
3084 if (autosw < 0)
3085 return autosw;
3086
3087 switch (video_supported) {
3088 case TPACPI_VIDEO_570:
3089 res = video_autosw_set(1);
3090 if (res)
3091 return res;
3092 res = acpi_evalf(ec_handle, NULL, "_Q16", "v");
3093 break;
3094 case TPACPI_VIDEO_770:
3095 case TPACPI_VIDEO_NEW:
3096 res = video_autosw_set(1);
3097 if (res)
3098 return res;
3099 res = acpi_evalf(vid_handle, NULL, "VSWT", "v");
3100 break;
3101 default:
3102 return -ENOSYS;
3103 }
3104 if (!autosw && video_autosw_set(autosw)) {
3105 printk(TPACPI_ERR
3106 "video auto-switch left enabled due to error\n");
3107 return -EIO;
3108 }
3109
3110 return (res)? 0 : -EIO;
3111 }
3112
3113 static int video_expand_toggle(void)
3114 {
3115 switch (video_supported) {
3116 case TPACPI_VIDEO_570:
3117 return acpi_evalf(ec_handle, NULL, "_Q17", "v")?
3118 0 : -EIO;
3119 case TPACPI_VIDEO_770:
3120 return acpi_evalf(vid_handle, NULL, "VEXP", "v")?
3121 0 : -EIO;
3122 case TPACPI_VIDEO_NEW:
3123 return acpi_evalf(NULL, NULL, "\\VEXP", "v")?
3124 0 : -EIO;
3125 default:
3126 return -ENOSYS;
3127 }
3128 /* not reached */
3129 }
3130
3131 static int video_read(char *p)
3132 {
3133 int status, autosw;
3134 int len = 0;
3135
3136 if (video_supported == TPACPI_VIDEO_NONE) {
3137 len += sprintf(p + len, "status:\t\tnot supported\n");
3138 return len;
3139 }
3140
3141 status = video_outputsw_get();
3142 if (status < 0)
3143 return status;
3144
3145 autosw = video_autosw_get();
3146 if (autosw < 0)
3147 return autosw;
3148
3149 len += sprintf(p + len, "status:\t\tsupported\n");
3150 len += sprintf(p + len, "lcd:\t\t%s\n", enabled(status, 0));
3151 len += sprintf(p + len, "crt:\t\t%s\n", enabled(status, 1));
3152 if (video_supported == TPACPI_VIDEO_NEW)
3153 len += sprintf(p + len, "dvi:\t\t%s\n", enabled(status, 3));
3154 len += sprintf(p + len, "auto:\t\t%s\n", enabled(autosw, 0));
3155 len += sprintf(p + len, "commands:\tlcd_enable, lcd_disable\n");
3156 len += sprintf(p + len, "commands:\tcrt_enable, crt_disable\n");
3157 if (video_supported == TPACPI_VIDEO_NEW)
3158 len += sprintf(p + len, "commands:\tdvi_enable, dvi_disable\n");
3159 len += sprintf(p + len, "commands:\tauto_enable, auto_disable\n");
3160 len += sprintf(p + len, "commands:\tvideo_switch, expand_toggle\n");
3161
3162 return len;
3163 }
3164
3165 static int video_write(char *buf)
3166 {
3167 char *cmd;
3168 int enable, disable, status;
3169 int res;
3170
3171 if (video_supported == TPACPI_VIDEO_NONE)
3172 return -ENODEV;
3173
3174 enable = 0;
3175 disable = 0;
3176
3177 while ((cmd = next_cmd(&buf))) {
3178 if (strlencmp(cmd, "lcd_enable") == 0) {
3179 enable |= TP_ACPI_VIDEO_S_LCD;
3180 } else if (strlencmp(cmd, "lcd_disable") == 0) {
3181 disable |= TP_ACPI_VIDEO_S_LCD;
3182 } else if (strlencmp(cmd, "crt_enable") == 0) {
3183 enable |= TP_ACPI_VIDEO_S_CRT;
3184 } else if (strlencmp(cmd, "crt_disable") == 0) {
3185 disable |= TP_ACPI_VIDEO_S_CRT;
3186 } else if (video_supported == TPACPI_VIDEO_NEW &&
3187 strlencmp(cmd, "dvi_enable") == 0) {
3188 enable |= TP_ACPI_VIDEO_S_DVI;
3189 } else if (video_supported == TPACPI_VIDEO_NEW &&
3190 strlencmp(cmd, "dvi_disable") == 0) {
3191 disable |= TP_ACPI_VIDEO_S_DVI;
3192 } else if (strlencmp(cmd, "auto_enable") == 0) {
3193 res = video_autosw_set(1);
3194 if (res)
3195 return res;
3196 } else if (strlencmp(cmd, "auto_disable") == 0) {
3197 res = video_autosw_set(0);
3198 if (res)
3199 return res;
3200 } else if (strlencmp(cmd, "video_switch") == 0) {
3201 res = video_outputsw_cycle();
3202 if (res)
3203 return res;
3204 } else if (strlencmp(cmd, "expand_toggle") == 0) {
3205 res = video_expand_toggle();
3206 if (res)
3207 return res;
3208 } else
3209 return -EINVAL;
3210 }
3211
3212 if (enable || disable) {
3213 status = video_outputsw_get();
3214 if (status < 0)
3215 return status;
3216 res = video_outputsw_set((status & ~disable) | enable);
3217 if (res)
3218 return res;
3219 }
3220
3221 return 0;
3222 }
3223
3224 static struct ibm_struct video_driver_data = {
3225 .name = "video",
3226 .read = video_read,
3227 .write = video_write,
3228 .exit = video_exit,
3229 };
3230
3231 #endif /* CONFIG_THINKPAD_ACPI_VIDEO */
3232
3233 /*************************************************************************
3234 * Light (thinklight) subdriver
3235 */
3236
3237 TPACPI_HANDLE(lght, root, "\\LGHT"); /* A21e, A2xm/p, T20-22, X20-21 */
3238 TPACPI_HANDLE(ledb, ec, "LEDB"); /* G4x */
3239
3240 static int __init light_init(struct ibm_init_struct *iibm)
3241 {
3242 vdbg_printk(TPACPI_DBG_INIT, "initializing light subdriver\n");
3243
3244 TPACPI_ACPIHANDLE_INIT(ledb);
3245 TPACPI_ACPIHANDLE_INIT(lght);
3246 TPACPI_ACPIHANDLE_INIT(cmos);
3247
3248 /* light not supported on 570, 600e/x, 770e, 770x, G4x, R30, R31 */
3249 tp_features.light = (cmos_handle || lght_handle) && !ledb_handle;
3250
3251 if (tp_features.light)
3252 /* light status not supported on
3253 570, 600e/x, 770e, 770x, G4x, R30, R31, R32, X20 */
3254 tp_features.light_status =
3255 acpi_evalf(ec_handle, NULL, "KBLT", "qv");
3256
3257 vdbg_printk(TPACPI_DBG_INIT, "light is %s\n",
3258 str_supported(tp_features.light));
3259
3260 return (tp_features.light)? 0 : 1;
3261 }
3262
3263 static int light_read(char *p)
3264 {
3265 int len = 0;
3266 int status = 0;
3267
3268 if (!tp_features.light) {
3269 len += sprintf(p + len, "status:\t\tnot supported\n");
3270 } else if (!tp_features.light_status) {
3271 len += sprintf(p + len, "status:\t\tunknown\n");
3272 len += sprintf(p + len, "commands:\ton, off\n");
3273 } else {
3274 if (!acpi_evalf(ec_handle, &status, "KBLT", "d"))
3275 return -EIO;
3276 len += sprintf(p + len, "status:\t\t%s\n", onoff(status, 0));
3277 len += sprintf(p + len, "commands:\ton, off\n");
3278 }
3279
3280 return len;
3281 }
3282
3283 static int light_write(char *buf)
3284 {
3285 int cmos_cmd, lght_cmd;
3286 char *cmd;
3287 int success;
3288
3289 if (!tp_features.light)
3290 return -ENODEV;
3291
3292 while ((cmd = next_cmd(&buf))) {
3293 if (strlencmp(cmd, "on") == 0) {
3294 cmos_cmd = 0x0c;
3295 lght_cmd = 1;
3296 } else if (strlencmp(cmd, "off") == 0) {
3297 cmos_cmd = 0x0d;
3298 lght_cmd = 0;
3299 } else
3300 return -EINVAL;
3301
3302 success = cmos_handle ?
3303 acpi_evalf(cmos_handle, NULL, NULL, "vd", cmos_cmd) :
3304 acpi_evalf(lght_handle, NULL, NULL, "vd", lght_cmd);
3305 if (!success)
3306 return -EIO;
3307 }
3308
3309 return 0;
3310 }
3311
3312 static struct ibm_struct light_driver_data = {
3313 .name = "light",
3314 .read = light_read,
3315 .write = light_write,
3316 };
3317
3318 /*************************************************************************
3319 * Dock subdriver
3320 */
3321
3322 #ifdef CONFIG_THINKPAD_ACPI_DOCK
3323
3324 static void dock_notify(struct ibm_struct *ibm, u32 event);
3325 static int dock_read(char *p);
3326 static int dock_write(char *buf);
3327
3328 TPACPI_HANDLE(dock, root, "\\_SB.GDCK", /* X30, X31, X40 */
3329 "\\_SB.PCI0.DOCK", /* 600e/x,770e,770x,A2xm/p,T20-22,X20-21 */
3330 "\\_SB.PCI0.PCI1.DOCK", /* all others */
3331 "\\_SB.PCI.ISA.SLCE", /* 570 */
3332 ); /* A21e,G4x,R30,R31,R32,R40,R40e,R50e */
3333
3334 /* don't list other alternatives as we install a notify handler on the 570 */
3335 TPACPI_HANDLE(pci, root, "\\_SB.PCI"); /* 570 */
3336
3337 static const struct acpi_device_id ibm_pci_device_ids[] = {
3338 {PCI_ROOT_HID_STRING, 0},
3339 {"", 0},
3340 };
3341
3342 static struct tp_acpi_drv_struct ibm_dock_acpidriver[2] = {
3343 {
3344 .notify = dock_notify,
3345 .handle = &dock_handle,
3346 .type = ACPI_SYSTEM_NOTIFY,
3347 },
3348 {
3349 /* THIS ONE MUST NEVER BE USED FOR DRIVER AUTOLOADING.
3350 * We just use it to get notifications of dock hotplug
3351 * in very old thinkpads */
3352 .hid = ibm_pci_device_ids,
3353 .notify = dock_notify,
3354 .handle = &pci_handle,
3355 .type = ACPI_SYSTEM_NOTIFY,
3356 },
3357 };
3358
3359 static struct ibm_struct dock_driver_data[2] = {
3360 {
3361 .name = "dock",
3362 .read = dock_read,
3363 .write = dock_write,
3364 .acpi = &ibm_dock_acpidriver[0],
3365 },
3366 {
3367 .name = "dock",
3368 .acpi = &ibm_dock_acpidriver[1],
3369 },
3370 };
3371
3372 #define dock_docked() (_sta(dock_handle) & 1)
3373
3374 static int __init dock_init(struct ibm_init_struct *iibm)
3375 {
3376 vdbg_printk(TPACPI_DBG_INIT, "initializing dock subdriver\n");
3377
3378 TPACPI_ACPIHANDLE_INIT(dock);
3379
3380 vdbg_printk(TPACPI_DBG_INIT, "dock is %s\n",
3381 str_supported(dock_handle != NULL));
3382
3383 return (dock_handle)? 0 : 1;
3384 }
3385
3386 static int __init dock_init2(struct ibm_init_struct *iibm)
3387 {
3388 int dock2_needed;
3389
3390 vdbg_printk(TPACPI_DBG_INIT, "initializing dock subdriver part 2\n");
3391
3392 if (dock_driver_data[0].flags.acpi_driver_registered &&
3393 dock_driver_data[0].flags.acpi_notify_installed) {
3394 TPACPI_ACPIHANDLE_INIT(pci);
3395 dock2_needed = (pci_handle != NULL);
3396 vdbg_printk(TPACPI_DBG_INIT,
3397 "dock PCI handler for the TP 570 is %s\n",
3398 str_supported(dock2_needed));
3399 } else {
3400 vdbg_printk(TPACPI_DBG_INIT,
3401 "dock subdriver part 2 not required\n");
3402 dock2_needed = 0;
3403 }
3404
3405 return (dock2_needed)? 0 : 1;
3406 }
3407
3408 static void dock_notify(struct ibm_struct *ibm, u32 event)
3409 {
3410 int docked = dock_docked();
3411 int pci = ibm->acpi->hid && ibm->acpi->device &&
3412 acpi_match_device_ids(ibm->acpi->device, ibm_pci_device_ids);
3413 int data;
3414
3415 if (event == 1 && !pci) /* 570 */
3416 data = 1; /* button */
3417 else if (event == 1 && pci) /* 570 */
3418 data = 3; /* dock */
3419 else if (event == 3 && docked)
3420 data = 1; /* button */
3421 else if (event == 3 && !docked)
3422 data = 2; /* undock */
3423 else if (event == 0 && docked)
3424 data = 3; /* dock */
3425 else {
3426 printk(TPACPI_ERR "unknown dock event %d, status %d\n",
3427 event, _sta(dock_handle));
3428 data = 0; /* unknown */
3429 }
3430 acpi_bus_generate_proc_event(ibm->acpi->device, event, data);
3431 acpi_bus_generate_netlink_event(ibm->acpi->device->pnp.device_class,
3432 ibm->acpi->device->dev.bus_id,
3433 event, data);
3434 }
3435
3436 static int dock_read(char *p)
3437 {
3438 int len = 0;
3439 int docked = dock_docked();
3440
3441 if (!dock_handle)
3442 len += sprintf(p + len, "status:\t\tnot supported\n");
3443 else if (!docked)
3444 len += sprintf(p + len, "status:\t\tundocked\n");
3445 else {
3446 len += sprintf(p + len, "status:\t\tdocked\n");
3447 len += sprintf(p + len, "commands:\tdock, undock\n");
3448 }
3449
3450 return len;
3451 }
3452
3453 static int dock_write(char *buf)
3454 {
3455 char *cmd;
3456
3457 if (!dock_docked())
3458 return -ENODEV;
3459
3460 while ((cmd = next_cmd(&buf))) {
3461 if (strlencmp(cmd, "undock") == 0) {
3462 if (!acpi_evalf(dock_handle, NULL, "_DCK", "vd", 0) ||
3463 !acpi_evalf(dock_handle, NULL, "_EJ0", "vd", 1))
3464 return -EIO;
3465 } else if (strlencmp(cmd, "dock") == 0) {
3466 if (!acpi_evalf(dock_handle, NULL, "_DCK", "vd", 1))
3467 return -EIO;
3468 } else
3469 return -EINVAL;
3470 }
3471
3472 return 0;
3473 }
3474
3475 #endif /* CONFIG_THINKPAD_ACPI_DOCK */
3476
3477 /*************************************************************************
3478 * Bay subdriver
3479 */
3480
3481 #ifdef CONFIG_THINKPAD_ACPI_BAY
3482
3483 TPACPI_HANDLE(bay, root, "\\_SB.PCI.IDE.SECN.MAST", /* 570 */
3484 "\\_SB.PCI0.IDE0.IDES.IDSM", /* 600e/x, 770e, 770x */
3485 "\\_SB.PCI0.SATA.SCND.MSTR", /* T60, X60, Z60 */
3486 "\\_SB.PCI0.IDE0.SCND.MSTR", /* all others */
3487 ); /* A21e, R30, R31 */
3488 TPACPI_HANDLE(bay_ej, bay, "_EJ3", /* 600e/x, A2xm/p, A3x */
3489 "_EJ0", /* all others */
3490 ); /* 570,A21e,G4x,R30,R31,R32,R40e,R50e */
3491 TPACPI_HANDLE(bay2, root, "\\_SB.PCI0.IDE0.PRIM.SLAV", /* A3x, R32 */
3492 "\\_SB.PCI0.IDE0.IDEP.IDPS", /* 600e/x, 770e, 770x */
3493 ); /* all others */
3494 TPACPI_HANDLE(bay2_ej, bay2, "_EJ3", /* 600e/x, 770e, A3x */
3495 "_EJ0", /* 770x */
3496 ); /* all others */
3497
3498 static int __init bay_init(struct ibm_init_struct *iibm)
3499 {
3500 vdbg_printk(TPACPI_DBG_INIT, "initializing bay subdriver\n");
3501
3502 TPACPI_ACPIHANDLE_INIT(bay);
3503 if (bay_handle)
3504 TPACPI_ACPIHANDLE_INIT(bay_ej);
3505 TPACPI_ACPIHANDLE_INIT(bay2);
3506 if (bay2_handle)
3507 TPACPI_ACPIHANDLE_INIT(bay2_ej);
3508
3509 tp_features.bay_status = bay_handle &&
3510 acpi_evalf(bay_handle, NULL, "_STA", "qv");
3511 tp_features.bay_status2 = bay2_handle &&
3512 acpi_evalf(bay2_handle, NULL, "_STA", "qv");
3513
3514 tp_features.bay_eject = bay_handle && bay_ej_handle &&
3515 (strlencmp(bay_ej_path, "_EJ0") == 0 || experimental);
3516 tp_features.bay_eject2 = bay2_handle && bay2_ej_handle &&
3517 (strlencmp(bay2_ej_path, "_EJ0") == 0 || experimental);
3518
3519 vdbg_printk(TPACPI_DBG_INIT,
3520 "bay 1: status %s, eject %s; bay 2: status %s, eject %s\n",
3521 str_supported(tp_features.bay_status),
3522 str_supported(tp_features.bay_eject),
3523 str_supported(tp_features.bay_status2),
3524 str_supported(tp_features.bay_eject2));
3525
3526 return (tp_features.bay_status || tp_features.bay_eject ||
3527 tp_features.bay_status2 || tp_features.bay_eject2)? 0 : 1;
3528 }
3529
3530 static void bay_notify(struct ibm_struct *ibm, u32 event)
3531 {
3532 acpi_bus_generate_proc_event(ibm->acpi->device, event, 0);
3533 acpi_bus_generate_netlink_event(ibm->acpi->device->pnp.device_class,
3534 ibm->acpi->device->dev.bus_id,
3535 event, 0);
3536 }
3537
3538 #define bay_occupied(b) (_sta(b##_handle) & 1)
3539
3540 static int bay_read(char *p)
3541 {
3542 int len = 0;
3543 int occupied = bay_occupied(bay);
3544 int occupied2 = bay_occupied(bay2);
3545 int eject, eject2;
3546
3547 len += sprintf(p + len, "status:\t\t%s\n",
3548 tp_features.bay_status ?
3549 (occupied ? "occupied" : "unoccupied") :
3550 "not supported");
3551 if (tp_features.bay_status2)
3552 len += sprintf(p + len, "status2:\t%s\n", occupied2 ?
3553 "occupied" : "unoccupied");
3554
3555 eject = tp_features.bay_eject && occupied;
3556 eject2 = tp_features.bay_eject2 && occupied2;
3557
3558 if (eject && eject2)
3559 len += sprintf(p + len, "commands:\teject, eject2\n");
3560 else if (eject)
3561 len += sprintf(p + len, "commands:\teject\n");
3562 else if (eject2)
3563 len += sprintf(p + len, "commands:\teject2\n");
3564
3565 return len;
3566 }
3567
3568 static int bay_write(char *buf)
3569 {
3570 char *cmd;
3571
3572 if (!tp_features.bay_eject && !tp_features.bay_eject2)
3573 return -ENODEV;
3574
3575 while ((cmd = next_cmd(&buf))) {
3576 if (tp_features.bay_eject && strlencmp(cmd, "eject") == 0) {
3577 if (!acpi_evalf(bay_ej_handle, NULL, NULL, "vd", 1))
3578 return -EIO;
3579 } else if (tp_features.bay_eject2 &&
3580 strlencmp(cmd, "eject2") == 0) {
3581 if (!acpi_evalf(bay2_ej_handle, NULL, NULL, "vd", 1))
3582 return -EIO;
3583 } else
3584 return -EINVAL;
3585 }
3586
3587 return 0;
3588 }
3589
3590 static struct tp_acpi_drv_struct ibm_bay_acpidriver = {
3591 .notify = bay_notify,
3592 .handle = &bay_handle,
3593 .type = ACPI_SYSTEM_NOTIFY,
3594 };
3595
3596 static struct ibm_struct bay_driver_data = {
3597 .name = "bay",
3598 .read = bay_read,
3599 .write = bay_write,
3600 .acpi = &ibm_bay_acpidriver,
3601 };
3602
3603 #endif /* CONFIG_THINKPAD_ACPI_BAY */
3604
3605 /*************************************************************************
3606 * CMOS subdriver
3607 */
3608
3609 /* sysfs cmos_command -------------------------------------------------- */
3610 static ssize_t cmos_command_store(struct device *dev,
3611 struct device_attribute *attr,
3612 const char *buf, size_t count)
3613 {
3614 unsigned long cmos_cmd;
3615 int res;
3616
3617 if (parse_strtoul(buf, 21, &cmos_cmd))
3618 return -EINVAL;
3619
3620 res = issue_thinkpad_cmos_command(cmos_cmd);
3621 return (res)? res : count;
3622 }
3623
3624 static struct device_attribute dev_attr_cmos_command =
3625 __ATTR(cmos_command, S_IWUSR, NULL, cmos_command_store);
3626
3627 /* --------------------------------------------------------------------- */
3628
3629 static int __init cmos_init(struct ibm_init_struct *iibm)
3630 {
3631 int res;
3632
3633 vdbg_printk(TPACPI_DBG_INIT,
3634 "initializing cmos commands subdriver\n");
3635
3636 TPACPI_ACPIHANDLE_INIT(cmos);
3637
3638 vdbg_printk(TPACPI_DBG_INIT, "cmos commands are %s\n",
3639 str_supported(cmos_handle != NULL));
3640
3641 res = device_create_file(&tpacpi_pdev->dev, &dev_attr_cmos_command);
3642 if (res)
3643 return res;
3644
3645 return (cmos_handle)? 0 : 1;
3646 }
3647
3648 static void cmos_exit(void)
3649 {
3650 device_remove_file(&tpacpi_pdev->dev, &dev_attr_cmos_command);
3651 }
3652
3653 static int cmos_read(char *p)
3654 {
3655 int len = 0;
3656
3657 /* cmos not supported on 570, 600e/x, 770e, 770x, A21e, A2xm/p,
3658 R30, R31, T20-22, X20-21 */
3659 if (!cmos_handle)
3660 len += sprintf(p + len, "status:\t\tnot supported\n");
3661 else {
3662 len += sprintf(p + len, "status:\t\tsupported\n");
3663 len += sprintf(p + len, "commands:\t<cmd> (<cmd> is 0-21)\n");
3664 }
3665
3666 return len;
3667 }
3668
3669 static int cmos_write(char *buf)
3670 {
3671 char *cmd;
3672 int cmos_cmd, res;
3673
3674 while ((cmd = next_cmd(&buf))) {
3675 if (sscanf(cmd, "%u", &cmos_cmd) == 1 &&
3676 cmos_cmd >= 0 && cmos_cmd <= 21) {
3677 /* cmos_cmd set */
3678 } else
3679 return -EINVAL;
3680
3681 res = issue_thinkpad_cmos_command(cmos_cmd);
3682 if (res)
3683 return res;
3684 }
3685
3686 return 0;
3687 }
3688
3689 static struct ibm_struct cmos_driver_data = {
3690 .name = "cmos",
3691 .read = cmos_read,
3692 .write = cmos_write,
3693 .exit = cmos_exit,
3694 };
3695
3696 /*************************************************************************
3697 * LED subdriver
3698 */
3699
3700 enum led_access_mode {
3701 TPACPI_LED_NONE = 0,
3702 TPACPI_LED_570, /* 570 */
3703 TPACPI_LED_OLD, /* 600e/x, 770e, 770x, A21e, A2xm/p, T20-22, X20-21 */
3704 TPACPI_LED_NEW, /* all others */
3705 };
3706
3707 enum { /* For TPACPI_LED_OLD */
3708 TPACPI_LED_EC_HLCL = 0x0c, /* EC reg to get led to power on */
3709 TPACPI_LED_EC_HLBL = 0x0d, /* EC reg to blink a lit led */
3710 TPACPI_LED_EC_HLMS = 0x0e, /* EC reg to select led to command */
3711 };
3712
3713 static enum led_access_mode led_supported;
3714
3715 TPACPI_HANDLE(led, ec, "SLED", /* 570 */
3716 "SYSL", /* 600e/x, 770e, 770x, A21e, A2xm/p, */
3717 /* T20-22, X20-21 */
3718 "LED", /* all others */
3719 ); /* R30, R31 */
3720
3721 static int __init led_init(struct ibm_init_struct *iibm)
3722 {
3723 vdbg_printk(TPACPI_DBG_INIT, "initializing LED subdriver\n");
3724
3725 TPACPI_ACPIHANDLE_INIT(led);
3726
3727 if (!led_handle)
3728 /* led not supported on R30, R31 */
3729 led_supported = TPACPI_LED_NONE;
3730 else if (strlencmp(led_path, "SLED") == 0)
3731 /* 570 */
3732 led_supported = TPACPI_LED_570;
3733 else if (strlencmp(led_path, "SYSL") == 0)
3734 /* 600e/x, 770e, 770x, A21e, A2xm/p, T20-22, X20-21 */
3735 led_supported = TPACPI_LED_OLD;
3736 else
3737 /* all others */
3738 led_supported = TPACPI_LED_NEW;
3739
3740 vdbg_printk(TPACPI_DBG_INIT, "LED commands are %s, mode %d\n",
3741 str_supported(led_supported), led_supported);
3742
3743 return (led_supported != TPACPI_LED_NONE)? 0 : 1;
3744 }
3745
3746 #define led_status(s) ((s) == 0 ? "off" : ((s) == 1 ? "on" : "blinking"))
3747
3748 static int led_read(char *p)
3749 {
3750 int len = 0;
3751
3752 if (!led_supported) {
3753 len += sprintf(p + len, "status:\t\tnot supported\n");
3754 return len;
3755 }
3756 len += sprintf(p + len, "status:\t\tsupported\n");
3757
3758 if (led_supported == TPACPI_LED_570) {
3759 /* 570 */
3760 int i, status;
3761 for (i = 0; i < 8; i++) {
3762 if (!acpi_evalf(ec_handle,
3763 &status, "GLED", "dd", 1 << i))
3764 return -EIO;
3765 len += sprintf(p + len, "%d:\t\t%s\n",
3766 i, led_status(status));
3767 }
3768 }
3769
3770 len += sprintf(p + len, "commands:\t"
3771 "<led> on, <led> off, <led> blink (<led> is 0-7)\n");
3772
3773 return len;
3774 }
3775
3776 /* off, on, blink */
3777 static const int led_sled_arg1[] = { 0, 1, 3 };
3778 static const int led_exp_hlbl[] = { 0, 0, 1 }; /* led# * */
3779 static const int led_exp_hlcl[] = { 0, 1, 1 }; /* led# * */
3780 static const int led_led_arg1[] = { 0, 0x80, 0xc0 };
3781
3782 static int led_write(char *buf)
3783 {
3784 char *cmd;
3785 int led, ind, ret;
3786
3787 if (!led_supported)
3788 return -ENODEV;
3789
3790 while ((cmd = next_cmd(&buf))) {
3791 if (sscanf(cmd, "%d", &led) != 1 || led < 0 || led > 7)
3792 return -EINVAL;
3793
3794 if (strstr(cmd, "off")) {
3795 ind = 0;
3796 } else if (strstr(cmd, "on")) {
3797 ind = 1;
3798 } else if (strstr(cmd, "blink")) {
3799 ind = 2;
3800 } else
3801 return -EINVAL;
3802
3803 if (led_supported == TPACPI_LED_570) {
3804 /* 570 */
3805 led = 1 << led;
3806 if (!acpi_evalf(led_handle, NULL, NULL, "vdd",
3807 led, led_sled_arg1[ind]))
3808 return -EIO;
3809 } else if (led_supported == TPACPI_LED_OLD) {
3810 /* 600e/x, 770e, 770x, A21e, A2xm/p, T20-22, X20 */
3811 led = 1 << led;
3812 ret = ec_write(TPACPI_LED_EC_HLMS, led);
3813 if (ret >= 0)
3814 ret = ec_write(TPACPI_LED_EC_HLBL,
3815 led * led_exp_hlbl[ind]);
3816 if (ret >= 0)
3817 ret = ec_write(TPACPI_LED_EC_HLCL,
3818 led * led_exp_hlcl[ind]);
3819 if (ret < 0)
3820 return ret;
3821 } else {
3822 /* all others */
3823 if (!acpi_evalf(led_handle, NULL, NULL, "vdd",
3824 led, led_led_arg1[ind]))
3825 return -EIO;
3826 }
3827 }
3828
3829 return 0;
3830 }
3831
3832 static struct ibm_struct led_driver_data = {
3833 .name = "led",
3834 .read = led_read,
3835 .write = led_write,
3836 };
3837
3838 /*************************************************************************
3839 * Beep subdriver
3840 */
3841
3842 TPACPI_HANDLE(beep, ec, "BEEP"); /* all except R30, R31 */
3843
3844 static int __init beep_init(struct ibm_init_struct *iibm)
3845 {
3846 vdbg_printk(TPACPI_DBG_INIT, "initializing beep subdriver\n");
3847
3848 TPACPI_ACPIHANDLE_INIT(beep);
3849
3850 vdbg_printk(TPACPI_DBG_INIT, "beep is %s\n",
3851 str_supported(beep_handle != NULL));
3852
3853 return (beep_handle)? 0 : 1;
3854 }
3855
3856 static int beep_read(char *p)
3857 {
3858 int len = 0;
3859
3860 if (!beep_handle)
3861 len += sprintf(p + len, "status:\t\tnot supported\n");
3862 else {
3863 len += sprintf(p + len, "status:\t\tsupported\n");
3864 len += sprintf(p + len, "commands:\t<cmd> (<cmd> is 0-17)\n");
3865 }
3866
3867 return len;
3868 }
3869
3870 static int beep_write(char *buf)
3871 {
3872 char *cmd;
3873 int beep_cmd;
3874
3875 if (!beep_handle)
3876 return -ENODEV;
3877
3878 while ((cmd = next_cmd(&buf))) {
3879 if (sscanf(cmd, "%u", &beep_cmd) == 1 &&
3880 beep_cmd >= 0 && beep_cmd <= 17) {
3881 /* beep_cmd set */
3882 } else
3883 return -EINVAL;
3884 if (!acpi_evalf(beep_handle, NULL, NULL, "vdd", beep_cmd, 0))
3885 return -EIO;
3886 }
3887
3888 return 0;
3889 }
3890
3891 static struct ibm_struct beep_driver_data = {
3892 .name = "beep",
3893 .read = beep_read,
3894 .write = beep_write,
3895 };
3896
3897 /*************************************************************************
3898 * Thermal subdriver
3899 */
3900
3901 enum thermal_access_mode {
3902 TPACPI_THERMAL_NONE = 0, /* No thermal support */
3903 TPACPI_THERMAL_ACPI_TMP07, /* Use ACPI TMP0-7 */
3904 TPACPI_THERMAL_ACPI_UPDT, /* Use ACPI TMP0-7 with UPDT */
3905 TPACPI_THERMAL_TPEC_8, /* Use ACPI EC regs, 8 sensors */
3906 TPACPI_THERMAL_TPEC_16, /* Use ACPI EC regs, 16 sensors */
3907 };
3908
3909 enum { /* TPACPI_THERMAL_TPEC_* */
3910 TP_EC_THERMAL_TMP0 = 0x78, /* ACPI EC regs TMP 0..7 */
3911 TP_EC_THERMAL_TMP8 = 0xC0, /* ACPI EC regs TMP 8..15 */
3912 TP_EC_THERMAL_TMP_NA = -128, /* ACPI EC sensor not available */
3913 };
3914
3915 #define TPACPI_MAX_THERMAL_SENSORS 16 /* Max thermal sensors supported */
3916 struct ibm_thermal_sensors_struct {
3917 s32 temp[TPACPI_MAX_THERMAL_SENSORS];
3918 };
3919
3920 static enum thermal_access_mode thermal_read_mode;
3921
3922 /* idx is zero-based */
3923 static int thermal_get_sensor(int idx, s32 *value)
3924 {
3925 int t;
3926 s8 tmp;
3927 char tmpi[5];
3928
3929 t = TP_EC_THERMAL_TMP0;
3930
3931 switch (thermal_read_mode) {
3932 #if TPACPI_MAX_THERMAL_SENSORS >= 16
3933 case TPACPI_THERMAL_TPEC_16:
3934 if (idx >= 8 && idx <= 15) {
3935 t = TP_EC_THERMAL_TMP8;
3936 idx -= 8;
3937 }
3938 /* fallthrough */
3939 #endif
3940 case TPACPI_THERMAL_TPEC_8:
3941 if (idx <= 7) {
3942 if (!acpi_ec_read(t + idx, &tmp))
3943 return -EIO;
3944 *value = tmp * 1000;
3945 return 0;
3946 }
3947 break;
3948
3949 case TPACPI_THERMAL_ACPI_UPDT:
3950 if (idx <= 7) {
3951 snprintf(tmpi, sizeof(tmpi), "TMP%c", '0' + idx);
3952 if (!acpi_evalf(ec_handle, NULL, "UPDT", "v"))
3953 return -EIO;
3954 if (!acpi_evalf(ec_handle, &t, tmpi, "d"))
3955 return -EIO;
3956 *value = (t - 2732) * 100;
3957 return 0;
3958 }
3959 break;
3960
3961 case TPACPI_THERMAL_ACPI_TMP07:
3962 if (idx <= 7) {
3963 snprintf(tmpi, sizeof(tmpi), "TMP%c", '0' + idx);
3964 if (!acpi_evalf(ec_handle, &t, tmpi, "d"))
3965 return -EIO;
3966 if (t > 127 || t < -127)
3967 t = TP_EC_THERMAL_TMP_NA;
3968 *value = t * 1000;
3969 return 0;
3970 }
3971 break;
3972
3973 case TPACPI_THERMAL_NONE:
3974 default:
3975 return -ENOSYS;
3976 }
3977
3978 return -EINVAL;
3979 }
3980
3981 static int thermal_get_sensors(struct ibm_thermal_sensors_struct *s)
3982 {
3983 int res, i;
3984 int n;
3985
3986 n = 8;
3987 i = 0;
3988
3989 if (!s)
3990 return -EINVAL;
3991
3992 if (thermal_read_mode == TPACPI_THERMAL_TPEC_16)
3993 n = 16;
3994
3995 for (i = 0 ; i < n; i++) {
3996 res = thermal_get_sensor(i, &s->temp[i]);
3997 if (res)
3998 return res;
3999 }
4000
4001 return n;
4002 }
4003
4004 /* sysfs temp##_input -------------------------------------------------- */
4005
4006 static ssize_t thermal_temp_input_show(struct device *dev,
4007 struct device_attribute *attr,
4008 char *buf)
4009 {
4010 struct sensor_device_attribute *sensor_attr =
4011 to_sensor_dev_attr(attr);
4012 int idx = sensor_attr->index;
4013 s32 value;
4014 int res;
4015
4016 res = thermal_get_sensor(idx, &value);
4017 if (res)
4018 return res;
4019 if (value == TP_EC_THERMAL_TMP_NA * 1000)
4020 return -ENXIO;
4021
4022 return snprintf(buf, PAGE_SIZE, "%d\n", value);
4023 }
4024
4025 #define THERMAL_SENSOR_ATTR_TEMP(_idxA, _idxB) \
4026 SENSOR_ATTR(temp##_idxA##_input, S_IRUGO, \
4027 thermal_temp_input_show, NULL, _idxB)
4028
4029 static struct sensor_device_attribute sensor_dev_attr_thermal_temp_input[] = {
4030 THERMAL_SENSOR_ATTR_TEMP(1, 0),
4031 THERMAL_SENSOR_ATTR_TEMP(2, 1),
4032 THERMAL_SENSOR_ATTR_TEMP(3, 2),
4033 THERMAL_SENSOR_ATTR_TEMP(4, 3),
4034 THERMAL_SENSOR_ATTR_TEMP(5, 4),
4035 THERMAL_SENSOR_ATTR_TEMP(6, 5),
4036 THERMAL_SENSOR_ATTR_TEMP(7, 6),
4037 THERMAL_SENSOR_ATTR_TEMP(8, 7),
4038 THERMAL_SENSOR_ATTR_TEMP(9, 8),
4039 THERMAL_SENSOR_ATTR_TEMP(10, 9),
4040 THERMAL_SENSOR_ATTR_TEMP(11, 10),
4041 THERMAL_SENSOR_ATTR_TEMP(12, 11),
4042 THERMAL_SENSOR_ATTR_TEMP(13, 12),
4043 THERMAL_SENSOR_ATTR_TEMP(14, 13),
4044 THERMAL_SENSOR_ATTR_TEMP(15, 14),
4045 THERMAL_SENSOR_ATTR_TEMP(16, 15),
4046 };
4047
4048 #define THERMAL_ATTRS(X) \
4049 &sensor_dev_attr_thermal_temp_input[X].dev_attr.attr
4050
4051 static struct attribute *thermal_temp_input_attr[] = {
4052 THERMAL_ATTRS(8),
4053 THERMAL_ATTRS(9),
4054 THERMAL_ATTRS(10),
4055 THERMAL_ATTRS(11),
4056 THERMAL_ATTRS(12),
4057 THERMAL_ATTRS(13),
4058 THERMAL_ATTRS(14),
4059 THERMAL_ATTRS(15),
4060 THERMAL_ATTRS(0),
4061 THERMAL_ATTRS(1),
4062 THERMAL_ATTRS(2),
4063 THERMAL_ATTRS(3),
4064 THERMAL_ATTRS(4),
4065 THERMAL_ATTRS(5),
4066 THERMAL_ATTRS(6),
4067 THERMAL_ATTRS(7),
4068 NULL
4069 };
4070
4071 static const struct attribute_group thermal_temp_input16_group = {
4072 .attrs = thermal_temp_input_attr
4073 };
4074
4075 static const struct attribute_group thermal_temp_input8_group = {
4076 .attrs = &thermal_temp_input_attr[8]
4077 };
4078
4079 #undef THERMAL_SENSOR_ATTR_TEMP
4080 #undef THERMAL_ATTRS
4081
4082 /* --------------------------------------------------------------------- */
4083
4084 static int __init thermal_init(struct ibm_init_struct *iibm)
4085 {
4086 u8 t, ta1, ta2;
4087 int i;
4088 int acpi_tmp7;
4089 int res;
4090
4091 vdbg_printk(TPACPI_DBG_INIT, "initializing thermal subdriver\n");
4092
4093 acpi_tmp7 = acpi_evalf(ec_handle, NULL, "TMP7", "qv");
4094
4095 if (thinkpad_id.ec_model) {
4096 /*
4097 * Direct EC access mode: sensors at registers
4098 * 0x78-0x7F, 0xC0-0xC7. Registers return 0x00 for
4099 * non-implemented, thermal sensors return 0x80 when
4100 * not available
4101 */
4102
4103 ta1 = ta2 = 0;
4104 for (i = 0; i < 8; i++) {
4105 if (acpi_ec_read(TP_EC_THERMAL_TMP0 + i, &t)) {
4106 ta1 |= t;
4107 } else {
4108 ta1 = 0;
4109 break;
4110 }
4111 if (acpi_ec_read(TP_EC_THERMAL_TMP8 + i, &t)) {
4112 ta2 |= t;
4113 } else {
4114 ta1 = 0;
4115 break;
4116 }
4117 }
4118 if (ta1 == 0) {
4119 /* This is sheer paranoia, but we handle it anyway */
4120 if (acpi_tmp7) {
4121 printk(TPACPI_ERR
4122 "ThinkPad ACPI EC access misbehaving, "
4123 "falling back to ACPI TMPx access "
4124 "mode\n");
4125 thermal_read_mode = TPACPI_THERMAL_ACPI_TMP07;
4126 } else {
4127 printk(TPACPI_ERR
4128 "ThinkPad ACPI EC access misbehaving, "
4129 "disabling thermal sensors access\n");
4130 thermal_read_mode = TPACPI_THERMAL_NONE;
4131 }
4132 } else {
4133 thermal_read_mode =
4134 (ta2 != 0) ?
4135 TPACPI_THERMAL_TPEC_16 : TPACPI_THERMAL_TPEC_8;
4136 }
4137 } else if (acpi_tmp7) {
4138 if (acpi_evalf(ec_handle, NULL, "UPDT", "qv")) {
4139 /* 600e/x, 770e, 770x */
4140 thermal_read_mode = TPACPI_THERMAL_ACPI_UPDT;
4141 } else {
4142 /* Standard ACPI TMPx access, max 8 sensors */
4143 thermal_read_mode = TPACPI_THERMAL_ACPI_TMP07;
4144 }
4145 } else {
4146 /* temperatures not supported on 570, G4x, R30, R31, R32 */
4147 thermal_read_mode = TPACPI_THERMAL_NONE;
4148 }
4149
4150 vdbg_printk(TPACPI_DBG_INIT, "thermal is %s, mode %d\n",
4151 str_supported(thermal_read_mode != TPACPI_THERMAL_NONE),
4152 thermal_read_mode);
4153
4154 switch (thermal_read_mode) {
4155 case TPACPI_THERMAL_TPEC_16:
4156 res = sysfs_create_group(&tpacpi_sensors_pdev->dev.kobj,
4157 &thermal_temp_input16_group);
4158 if (res)
4159 return res;
4160 break;
4161 case TPACPI_THERMAL_TPEC_8:
4162 case TPACPI_THERMAL_ACPI_TMP07:
4163 case TPACPI_THERMAL_ACPI_UPDT:
4164 res = sysfs_create_group(&tpacpi_sensors_pdev->dev.kobj,
4165 &thermal_temp_input8_group);
4166 if (res)
4167 return res;
4168 break;
4169 case TPACPI_THERMAL_NONE:
4170 default:
4171 return 1;
4172 }
4173
4174 return 0;
4175 }
4176
4177 static void thermal_exit(void)
4178 {
4179 switch (thermal_read_mode) {
4180 case TPACPI_THERMAL_TPEC_16:
4181 sysfs_remove_group(&tpacpi_sensors_pdev->dev.kobj,
4182 &thermal_temp_input16_group);
4183 break;
4184 case TPACPI_THERMAL_TPEC_8:
4185 case TPACPI_THERMAL_ACPI_TMP07:
4186 case TPACPI_THERMAL_ACPI_UPDT:
4187 sysfs_remove_group(&tpacpi_sensors_pdev->dev.kobj,
4188 &thermal_temp_input16_group);
4189 break;
4190 case TPACPI_THERMAL_NONE:
4191 default:
4192 break;
4193 }
4194 }
4195
4196 static int thermal_read(char *p)
4197 {
4198 int len = 0;
4199 int n, i;
4200 struct ibm_thermal_sensors_struct t;
4201
4202 n = thermal_get_sensors(&t);
4203 if (unlikely(n < 0))
4204 return n;
4205
4206 len += sprintf(p + len, "temperatures:\t");
4207
4208 if (n > 0) {
4209 for (i = 0; i < (n - 1); i++)
4210 len += sprintf(p + len, "%d ", t.temp[i] / 1000);
4211 len += sprintf(p + len, "%d\n", t.temp[i] / 1000);
4212 } else
4213 len += sprintf(p + len, "not supported\n");
4214
4215 return len;
4216 }
4217
4218 static struct ibm_struct thermal_driver_data = {
4219 .name = "thermal",
4220 .read = thermal_read,
4221 .exit = thermal_exit,
4222 };
4223
4224 /*************************************************************************
4225 * EC Dump subdriver
4226 */
4227
4228 static u8 ecdump_regs[256];
4229
4230 static int ecdump_read(char *p)
4231 {
4232 int len = 0;
4233 int i, j;
4234 u8 v;
4235
4236 len += sprintf(p + len, "EC "
4237 " +00 +01 +02 +03 +04 +05 +06 +07"
4238 " +08 +09 +0a +0b +0c +0d +0e +0f\n");
4239 for (i = 0; i < 256; i += 16) {
4240 len += sprintf(p + len, "EC 0x%02x:", i);
4241 for (j = 0; j < 16; j++) {
4242 if (!acpi_ec_read(i + j, &v))
4243 break;
4244 if (v != ecdump_regs[i + j])
4245 len += sprintf(p + len, " *%02x", v);
4246 else
4247 len += sprintf(p + len, " %02x", v);
4248 ecdump_regs[i + j] = v;
4249 }
4250 len += sprintf(p + len, "\n");
4251 if (j != 16)
4252 break;
4253 }
4254
4255 /* These are way too dangerous to advertise openly... */
4256 #if 0
4257 len += sprintf(p + len, "commands:\t0x<offset> 0x<value>"
4258 " (<offset> is 00-ff, <value> is 00-ff)\n");
4259 len += sprintf(p + len, "commands:\t0x<offset> <value> "
4260 " (<offset> is 00-ff, <value> is 0-255)\n");
4261 #endif
4262 return len;
4263 }
4264
4265 static int ecdump_write(char *buf)
4266 {
4267 char *cmd;
4268 int i, v;
4269
4270 while ((cmd = next_cmd(&buf))) {
4271 if (sscanf(cmd, "0x%x 0x%x", &i, &v) == 2) {
4272 /* i and v set */
4273 } else if (sscanf(cmd, "0x%x %u", &i, &v) == 2) {
4274 /* i and v set */
4275 } else
4276 return -EINVAL;
4277 if (i >= 0 && i < 256 && v >= 0 && v < 256) {
4278 if (!acpi_ec_write(i, v))
4279 return -EIO;
4280 } else
4281 return -EINVAL;
4282 }
4283
4284 return 0;
4285 }
4286
4287 static struct ibm_struct ecdump_driver_data = {
4288 .name = "ecdump",
4289 .read = ecdump_read,
4290 .write = ecdump_write,
4291 .flags.experimental = 1,
4292 };
4293
4294 /*************************************************************************
4295 * Backlight/brightness subdriver
4296 */
4297
4298 #define TPACPI_BACKLIGHT_DEV_NAME "thinkpad_screen"
4299
4300 enum {
4301 TP_EC_BACKLIGHT = 0x31,
4302
4303 /* TP_EC_BACKLIGHT bitmasks */
4304 TP_EC_BACKLIGHT_LVLMSK = 0x1F,
4305 TP_EC_BACKLIGHT_CMDMSK = 0xE0,
4306 TP_EC_BACKLIGHT_MAPSW = 0x20,
4307 };
4308
4309 static struct backlight_device *ibm_backlight_device;
4310 static int brightness_mode;
4311 static unsigned int brightness_enable = 2; /* 2 = auto, 0 = no, 1 = yes */
4312
4313 static struct mutex brightness_mutex;
4314
4315 /*
4316 * ThinkPads can read brightness from two places: EC 0x31, or
4317 * CMOS NVRAM byte 0x5E, bits 0-3.
4318 *
4319 * EC 0x31 has the following layout
4320 * Bit 7: unknown function
4321 * Bit 6: unknown function
4322 * Bit 5: Z: honour scale changes, NZ: ignore scale changes
4323 * Bit 4: must be set to zero to avoid problems
4324 * Bit 3-0: backlight brightness level
4325 *
4326 * brightness_get_raw returns status data in the EC 0x31 layout
4327 */
4328 static int brightness_get_raw(int *status)
4329 {
4330 u8 lec = 0, lcmos = 0, level = 0;
4331
4332 if (brightness_mode & 1) {
4333 if (!acpi_ec_read(TP_EC_BACKLIGHT, &lec))
4334 return -EIO;
4335 level = lec & TP_EC_BACKLIGHT_LVLMSK;
4336 };
4337 if (brightness_mode & 2) {
4338 lcmos = (nvram_read_byte(TP_NVRAM_ADDR_BRIGHTNESS)
4339 & TP_NVRAM_MASK_LEVEL_BRIGHTNESS)
4340 >> TP_NVRAM_POS_LEVEL_BRIGHTNESS;
4341 lcmos &= (tp_features.bright_16levels)? 0x0f : 0x07;
4342 level = lcmos;
4343 }
4344
4345 if (brightness_mode == 3) {
4346 *status = lec; /* Prefer EC, CMOS is just a backing store */
4347 lec &= TP_EC_BACKLIGHT_LVLMSK;
4348 if (lec == lcmos)
4349 tp_warned.bright_cmos_ec_unsync = 0;
4350 else {
4351 if (!tp_warned.bright_cmos_ec_unsync) {
4352 printk(TPACPI_ERR
4353 "CMOS NVRAM (%u) and EC (%u) do not "
4354 "agree on display brightness level\n",
4355 (unsigned int) lcmos,
4356 (unsigned int) lec);
4357 tp_warned.bright_cmos_ec_unsync = 1;
4358 }
4359 return -EIO;
4360 }
4361 } else {
4362 *status = level;
4363 }
4364
4365 return 0;
4366 }
4367
4368 /* May return EINTR which can always be mapped to ERESTARTSYS */
4369 static int brightness_set(int value)
4370 {
4371 int cmos_cmd, inc, i, res;
4372 int current_value;
4373 int command_bits;
4374
4375 if (value > ((tp_features.bright_16levels)? 15 : 7) ||
4376 value < 0)
4377 return -EINVAL;
4378
4379 res = mutex_lock_interruptible(&brightness_mutex);
4380 if (res < 0)
4381 return res;
4382
4383 res = brightness_get_raw(&current_value);
4384 if (res < 0)
4385 goto errout;
4386
4387 command_bits = current_value & TP_EC_BACKLIGHT_CMDMSK;
4388 current_value &= TP_EC_BACKLIGHT_LVLMSK;
4389
4390 cmos_cmd = value > current_value ?
4391 TP_CMOS_BRIGHTNESS_UP :
4392 TP_CMOS_BRIGHTNESS_DOWN;
4393 inc = (value > current_value)? 1 : -1;
4394
4395 res = 0;
4396 for (i = current_value; i != value; i += inc) {
4397 if ((brightness_mode & 2) &&
4398 issue_thinkpad_cmos_command(cmos_cmd)) {
4399 res = -EIO;
4400 goto errout;
4401 }
4402 if ((brightness_mode & 1) &&
4403 !acpi_ec_write(TP_EC_BACKLIGHT,
4404 (i + inc) | command_bits)) {
4405 res = -EIO;
4406 goto errout;;
4407 }
4408 }
4409
4410 errout:
4411 mutex_unlock(&brightness_mutex);
4412 return res;
4413 }
4414
4415 /* sysfs backlight class ----------------------------------------------- */
4416
4417 static int brightness_update_status(struct backlight_device *bd)
4418 {
4419 /* it is the backlight class's job (caller) to handle
4420 * EINTR and other errors properly */
4421 return brightness_set(
4422 (bd->props.fb_blank == FB_BLANK_UNBLANK &&
4423 bd->props.power == FB_BLANK_UNBLANK) ?
4424 bd->props.brightness : 0);
4425 }
4426
4427 static int brightness_get(struct backlight_device *bd)
4428 {
4429 int status, res;
4430
4431 res = brightness_get_raw(&status);
4432 if (res < 0)
4433 return 0; /* FIXME: teach backlight about error handling */
4434
4435 return status & TP_EC_BACKLIGHT_LVLMSK;
4436 }
4437
4438 static struct backlight_ops ibm_backlight_data = {
4439 .get_brightness = brightness_get,
4440 .update_status = brightness_update_status,
4441 };
4442
4443 /* --------------------------------------------------------------------- */
4444
4445 static int __init brightness_init(struct ibm_init_struct *iibm)
4446 {
4447 int b;
4448
4449 vdbg_printk(TPACPI_DBG_INIT, "initializing brightness subdriver\n");
4450
4451 mutex_init(&brightness_mutex);
4452
4453 /*
4454 * We always attempt to detect acpi support, so as to switch
4455 * Lenovo Vista BIOS to ACPI brightness mode even if we are not
4456 * going to publish a backlight interface
4457 */
4458 b = tpacpi_check_std_acpi_brightness_support();
4459 if (b > 0) {
4460 if (thinkpad_id.vendor == PCI_VENDOR_ID_LENOVO) {
4461 printk(TPACPI_NOTICE
4462 "Lenovo BIOS switched to ACPI backlight "
4463 "control mode\n");
4464 }
4465 if (brightness_enable > 1) {
4466 printk(TPACPI_NOTICE
4467 "standard ACPI backlight interface "
4468 "available, not loading native one...\n");
4469 return 1;
4470 }
4471 }
4472
4473 if (!brightness_enable) {
4474 dbg_printk(TPACPI_DBG_INIT,
4475 "brightness support disabled by "
4476 "module parameter\n");
4477 return 1;
4478 }
4479
4480 if (b > 16) {
4481 printk(TPACPI_ERR
4482 "Unsupported brightness interface, "
4483 "please contact %s\n", TPACPI_MAIL);
4484 return 1;
4485 }
4486 if (b == 16)
4487 tp_features.bright_16levels = 1;
4488
4489 if (!brightness_mode) {
4490 if (thinkpad_id.vendor == PCI_VENDOR_ID_LENOVO)
4491 brightness_mode = 2;
4492 else
4493 brightness_mode = 3;
4494
4495 dbg_printk(TPACPI_DBG_INIT, "selected brightness_mode=%d\n",
4496 brightness_mode);
4497 }
4498
4499 if (brightness_mode > 3)
4500 return -EINVAL;
4501
4502 if (brightness_get_raw(&b) < 0)
4503 return 1;
4504
4505 if (tp_features.bright_16levels)
4506 printk(TPACPI_INFO
4507 "detected a 16-level brightness capable ThinkPad\n");
4508
4509 ibm_backlight_device = backlight_device_register(
4510 TPACPI_BACKLIGHT_DEV_NAME, NULL, NULL,
4511 &ibm_backlight_data);
4512 if (IS_ERR(ibm_backlight_device)) {
4513 printk(TPACPI_ERR "Could not register backlight device\n");
4514 return PTR_ERR(ibm_backlight_device);
4515 }
4516 vdbg_printk(TPACPI_DBG_INIT, "brightness is supported\n");
4517
4518 ibm_backlight_device->props.max_brightness =
4519 (tp_features.bright_16levels)? 15 : 7;
4520 ibm_backlight_device->props.brightness = b & TP_EC_BACKLIGHT_LVLMSK;
4521 backlight_update_status(ibm_backlight_device);
4522
4523 return 0;
4524 }
4525
4526 static void brightness_exit(void)
4527 {
4528 if (ibm_backlight_device) {
4529 vdbg_printk(TPACPI_DBG_EXIT,
4530 "calling backlight_device_unregister()\n");
4531 backlight_device_unregister(ibm_backlight_device);
4532 ibm_backlight_device = NULL;
4533 }
4534 }
4535
4536 static int brightness_read(char *p)
4537 {
4538 int len = 0;
4539 int level;
4540
4541 level = brightness_get(NULL);
4542 if (level < 0) {
4543 len += sprintf(p + len, "level:\t\tunreadable\n");
4544 } else {
4545 len += sprintf(p + len, "level:\t\t%d\n", level);
4546 len += sprintf(p + len, "commands:\tup, down\n");
4547 len += sprintf(p + len, "commands:\tlevel <level>"
4548 " (<level> is 0-%d)\n",
4549 (tp_features.bright_16levels) ? 15 : 7);
4550 }
4551
4552 return len;
4553 }
4554
4555 static int brightness_write(char *buf)
4556 {
4557 int level;
4558 int rc;
4559 char *cmd;
4560 int max_level = (tp_features.bright_16levels) ? 15 : 7;
4561
4562 level = brightness_get(NULL);
4563 if (level < 0)
4564 return level;
4565
4566 while ((cmd = next_cmd(&buf))) {
4567 if (strlencmp(cmd, "up") == 0) {
4568 if (level < max_level)
4569 level++;
4570 } else if (strlencmp(cmd, "down") == 0) {
4571 if (level > 0)
4572 level--;
4573 } else if (sscanf(cmd, "level %d", &level) == 1 &&
4574 level >= 0 && level <= max_level) {
4575 /* new level set */
4576 } else
4577 return -EINVAL;
4578 }
4579
4580 /*
4581 * Now we know what the final level should be, so we try to set it.
4582 * Doing it this way makes the syscall restartable in case of EINTR
4583 */
4584 rc = brightness_set(level);
4585 return (rc == -EINTR)? ERESTARTSYS : rc;
4586 }
4587
4588 static struct ibm_struct brightness_driver_data = {
4589 .name = "brightness",
4590 .read = brightness_read,
4591 .write = brightness_write,
4592 .exit = brightness_exit,
4593 };
4594
4595 /*************************************************************************
4596 * Volume subdriver
4597 */
4598
4599 static int volume_offset = 0x30;
4600
4601 static int volume_read(char *p)
4602 {
4603 int len = 0;
4604 u8 level;
4605
4606 if (!acpi_ec_read(volume_offset, &level)) {
4607 len += sprintf(p + len, "level:\t\tunreadable\n");
4608 } else {
4609 len += sprintf(p + len, "level:\t\t%d\n", level & 0xf);
4610 len += sprintf(p + len, "mute:\t\t%s\n", onoff(level, 6));
4611 len += sprintf(p + len, "commands:\tup, down, mute\n");
4612 len += sprintf(p + len, "commands:\tlevel <level>"
4613 " (<level> is 0-15)\n");
4614 }
4615
4616 return len;
4617 }
4618
4619 static int volume_write(char *buf)
4620 {
4621 int cmos_cmd, inc, i;
4622 u8 level, mute;
4623 int new_level, new_mute;
4624 char *cmd;
4625
4626 while ((cmd = next_cmd(&buf))) {
4627 if (!acpi_ec_read(volume_offset, &level))
4628 return -EIO;
4629 new_mute = mute = level & 0x40;
4630 new_level = level = level & 0xf;
4631
4632 if (strlencmp(cmd, "up") == 0) {
4633 if (mute)
4634 new_mute = 0;
4635 else
4636 new_level = level == 15 ? 15 : level + 1;
4637 } else if (strlencmp(cmd, "down") == 0) {
4638 if (mute)
4639 new_mute = 0;
4640 else
4641 new_level = level == 0 ? 0 : level - 1;
4642 } else if (sscanf(cmd, "level %d", &new_level) == 1 &&
4643 new_level >= 0 && new_level <= 15) {
4644 /* new_level set */
4645 } else if (strlencmp(cmd, "mute") == 0) {
4646 new_mute = 0x40;
4647 } else
4648 return -EINVAL;
4649
4650 if (new_level != level) {
4651 /* mute doesn't change */
4652
4653 cmos_cmd = (new_level > level) ?
4654 TP_CMOS_VOLUME_UP : TP_CMOS_VOLUME_DOWN;
4655 inc = new_level > level ? 1 : -1;
4656
4657 if (mute && (issue_thinkpad_cmos_command(cmos_cmd) ||
4658 !acpi_ec_write(volume_offset, level)))
4659 return -EIO;
4660
4661 for (i = level; i != new_level; i += inc)
4662 if (issue_thinkpad_cmos_command(cmos_cmd) ||
4663 !acpi_ec_write(volume_offset, i + inc))
4664 return -EIO;
4665
4666 if (mute &&
4667 (issue_thinkpad_cmos_command(TP_CMOS_VOLUME_MUTE) ||
4668 !acpi_ec_write(volume_offset, new_level + mute))) {
4669 return -EIO;
4670 }
4671 }
4672
4673 if (new_mute != mute) {
4674 /* level doesn't change */
4675
4676 cmos_cmd = (new_mute) ?
4677 TP_CMOS_VOLUME_MUTE : TP_CMOS_VOLUME_UP;
4678
4679 if (issue_thinkpad_cmos_command(cmos_cmd) ||
4680 !acpi_ec_write(volume_offset, level + new_mute))
4681 return -EIO;
4682 }
4683 }
4684
4685 return 0;
4686 }
4687
4688 static struct ibm_struct volume_driver_data = {
4689 .name = "volume",
4690 .read = volume_read,
4691 .write = volume_write,
4692 };
4693
4694 /*************************************************************************
4695 * Fan subdriver
4696 */
4697
4698 /*
4699 * FAN ACCESS MODES
4700 *
4701 * TPACPI_FAN_RD_ACPI_GFAN:
4702 * ACPI GFAN method: returns fan level
4703 *
4704 * see TPACPI_FAN_WR_ACPI_SFAN
4705 * EC 0x2f (HFSP) not available if GFAN exists
4706 *
4707 * TPACPI_FAN_WR_ACPI_SFAN:
4708 * ACPI SFAN method: sets fan level, 0 (stop) to 7 (max)
4709 *
4710 * EC 0x2f (HFSP) might be available *for reading*, but do not use
4711 * it for writing.
4712 *
4713 * TPACPI_FAN_WR_TPEC:
4714 * ThinkPad EC register 0x2f (HFSP): fan control loop mode
4715 * Supported on almost all ThinkPads
4716 *
4717 * Fan speed changes of any sort (including those caused by the
4718 * disengaged mode) are usually done slowly by the firmware as the
4719 * maximum ammount of fan duty cycle change per second seems to be
4720 * limited.
4721 *
4722 * Reading is not available if GFAN exists.
4723 * Writing is not available if SFAN exists.
4724 *
4725 * Bits
4726 * 7 automatic mode engaged;
4727 * (default operation mode of the ThinkPad)
4728 * fan level is ignored in this mode.
4729 * 6 full speed mode (takes precedence over bit 7);
4730 * not available on all thinkpads. May disable
4731 * the tachometer while the fan controller ramps up
4732 * the speed (which can take up to a few *minutes*).
4733 * Speeds up fan to 100% duty-cycle, which is far above
4734 * the standard RPM levels. It is not impossible that
4735 * it could cause hardware damage.
4736 * 5-3 unused in some models. Extra bits for fan level
4737 * in others, but still useless as all values above
4738 * 7 map to the same speed as level 7 in these models.
4739 * 2-0 fan level (0..7 usually)
4740 * 0x00 = stop
4741 * 0x07 = max (set when temperatures critical)
4742 * Some ThinkPads may have other levels, see
4743 * TPACPI_FAN_WR_ACPI_FANS (X31/X40/X41)
4744 *
4745 * FIRMWARE BUG: on some models, EC 0x2f might not be initialized at
4746 * boot. Apparently the EC does not intialize it, so unless ACPI DSDT
4747 * does so, its initial value is meaningless (0x07).
4748 *
4749 * For firmware bugs, refer to:
4750 * http://thinkwiki.org/wiki/Embedded_Controller_Firmware#Firmware_Issues
4751 *
4752 * ----
4753 *
4754 * ThinkPad EC register 0x84 (LSB), 0x85 (MSB):
4755 * Main fan tachometer reading (in RPM)
4756 *
4757 * This register is present on all ThinkPads with a new-style EC, and
4758 * it is known not to be present on the A21m/e, and T22, as there is
4759 * something else in offset 0x84 according to the ACPI DSDT. Other
4760 * ThinkPads from this same time period (and earlier) probably lack the
4761 * tachometer as well.
4762 *
4763 * Unfortunately a lot of ThinkPads with new-style ECs but whose firwmare
4764 * was never fixed by IBM to report the EC firmware version string
4765 * probably support the tachometer (like the early X models), so
4766 * detecting it is quite hard. We need more data to know for sure.
4767 *
4768 * FIRMWARE BUG: always read 0x84 first, otherwise incorrect readings
4769 * might result.
4770 *
4771 * FIRMWARE BUG: may go stale while the EC is switching to full speed
4772 * mode.
4773 *
4774 * For firmware bugs, refer to:
4775 * http://thinkwiki.org/wiki/Embedded_Controller_Firmware#Firmware_Issues
4776 *
4777 * TPACPI_FAN_WR_ACPI_FANS:
4778 * ThinkPad X31, X40, X41. Not available in the X60.
4779 *
4780 * FANS ACPI handle: takes three arguments: low speed, medium speed,
4781 * high speed. ACPI DSDT seems to map these three speeds to levels
4782 * as follows: STOP LOW LOW MED MED HIGH HIGH HIGH HIGH
4783 * (this map is stored on FAN0..FAN8 as "0,1,1,2,2,3,3,3,3")
4784 *
4785 * The speeds are stored on handles
4786 * (FANA:FAN9), (FANC:FANB), (FANE:FAND).
4787 *
4788 * There are three default speed sets, acessible as handles:
4789 * FS1L,FS1M,FS1H; FS2L,FS2M,FS2H; FS3L,FS3M,FS3H
4790 *
4791 * ACPI DSDT switches which set is in use depending on various
4792 * factors.
4793 *
4794 * TPACPI_FAN_WR_TPEC is also available and should be used to
4795 * command the fan. The X31/X40/X41 seems to have 8 fan levels,
4796 * but the ACPI tables just mention level 7.
4797 */
4798
4799 enum { /* Fan control constants */
4800 fan_status_offset = 0x2f, /* EC register 0x2f */
4801 fan_rpm_offset = 0x84, /* EC register 0x84: LSB, 0x85 MSB (RPM)
4802 * 0x84 must be read before 0x85 */
4803
4804 TP_EC_FAN_FULLSPEED = 0x40, /* EC fan mode: full speed */
4805 TP_EC_FAN_AUTO = 0x80, /* EC fan mode: auto fan control */
4806
4807 TPACPI_FAN_LAST_LEVEL = 0x100, /* Use cached last-seen fan level */
4808 };
4809
4810 enum fan_status_access_mode {
4811 TPACPI_FAN_NONE = 0, /* No fan status or control */
4812 TPACPI_FAN_RD_ACPI_GFAN, /* Use ACPI GFAN */
4813 TPACPI_FAN_RD_TPEC, /* Use ACPI EC regs 0x2f, 0x84-0x85 */
4814 };
4815
4816 enum fan_control_access_mode {
4817 TPACPI_FAN_WR_NONE = 0, /* No fan control */
4818 TPACPI_FAN_WR_ACPI_SFAN, /* Use ACPI SFAN */
4819 TPACPI_FAN_WR_TPEC, /* Use ACPI EC reg 0x2f */
4820 TPACPI_FAN_WR_ACPI_FANS, /* Use ACPI FANS and EC reg 0x2f */
4821 };
4822
4823 enum fan_control_commands {
4824 TPACPI_FAN_CMD_SPEED = 0x0001, /* speed command */
4825 TPACPI_FAN_CMD_LEVEL = 0x0002, /* level command */
4826 TPACPI_FAN_CMD_ENABLE = 0x0004, /* enable/disable cmd,
4827 * and also watchdog cmd */
4828 };
4829
4830 static int fan_control_allowed;
4831
4832 static enum fan_status_access_mode fan_status_access_mode;
4833 static enum fan_control_access_mode fan_control_access_mode;
4834 static enum fan_control_commands fan_control_commands;
4835
4836 static u8 fan_control_initial_status;
4837 static u8 fan_control_desired_level;
4838 static int fan_watchdog_maxinterval;
4839
4840 static struct mutex fan_mutex;
4841
4842 static void fan_watchdog_fire(struct work_struct *ignored);
4843 static DECLARE_DELAYED_WORK(fan_watchdog_task, fan_watchdog_fire);
4844
4845 TPACPI_HANDLE(fans, ec, "FANS"); /* X31, X40, X41 */
4846 TPACPI_HANDLE(gfan, ec, "GFAN", /* 570 */
4847 "\\FSPD", /* 600e/x, 770e, 770x */
4848 ); /* all others */
4849 TPACPI_HANDLE(sfan, ec, "SFAN", /* 570 */
4850 "JFNS", /* 770x-JL */
4851 ); /* all others */
4852
4853 /*
4854 * Call with fan_mutex held
4855 */
4856 static void fan_update_desired_level(u8 status)
4857 {
4858 if ((status &
4859 (TP_EC_FAN_AUTO | TP_EC_FAN_FULLSPEED)) == 0) {
4860 if (status > 7)
4861 fan_control_desired_level = 7;
4862 else
4863 fan_control_desired_level = status;
4864 }
4865 }
4866
4867 static int fan_get_status(u8 *status)
4868 {
4869 u8 s;
4870
4871 /* TODO:
4872 * Add TPACPI_FAN_RD_ACPI_FANS ? */
4873
4874 switch (fan_status_access_mode) {
4875 case TPACPI_FAN_RD_ACPI_GFAN:
4876 /* 570, 600e/x, 770e, 770x */
4877
4878 if (unlikely(!acpi_evalf(gfan_handle, &s, NULL, "d")))
4879 return -EIO;
4880
4881 if (likely(status))
4882 *status = s & 0x07;
4883
4884 break;
4885
4886 case TPACPI_FAN_RD_TPEC:
4887 /* all except 570, 600e/x, 770e, 770x */
4888 if (unlikely(!acpi_ec_read(fan_status_offset, &s)))
4889 return -EIO;
4890
4891 if (likely(status))
4892 *status = s;
4893
4894 break;
4895
4896 default:
4897 return -ENXIO;
4898 }
4899
4900 return 0;
4901 }
4902
4903 static int fan_get_status_safe(u8 *status)
4904 {
4905 int rc;
4906 u8 s;
4907
4908 if (mutex_lock_interruptible(&fan_mutex))
4909 return -ERESTARTSYS;
4910 rc = fan_get_status(&s);
4911 if (!rc)
4912 fan_update_desired_level(s);
4913 mutex_unlock(&fan_mutex);
4914
4915 if (status)
4916 *status = s;
4917
4918 return rc;
4919 }
4920
4921 static int fan_get_speed(unsigned int *speed)
4922 {
4923 u8 hi, lo;
4924
4925 switch (fan_status_access_mode) {
4926 case TPACPI_FAN_RD_TPEC:
4927 /* all except 570, 600e/x, 770e, 770x */
4928 if (unlikely(!acpi_ec_read(fan_rpm_offset, &lo) ||
4929 !acpi_ec_read(fan_rpm_offset + 1, &hi)))
4930 return -EIO;
4931
4932 if (likely(speed))
4933 *speed = (hi << 8) | lo;
4934
4935 break;
4936
4937 default:
4938 return -ENXIO;
4939 }
4940
4941 return 0;
4942 }
4943
4944 static int fan_set_level(int level)
4945 {
4946 if (!fan_control_allowed)
4947 return -EPERM;
4948
4949 switch (fan_control_access_mode) {
4950 case TPACPI_FAN_WR_ACPI_SFAN:
4951 if (level >= 0 && level <= 7) {
4952 if (!acpi_evalf(sfan_handle, NULL, NULL, "vd", level))
4953 return -EIO;
4954 } else
4955 return -EINVAL;
4956 break;
4957
4958 case TPACPI_FAN_WR_ACPI_FANS:
4959 case TPACPI_FAN_WR_TPEC:
4960 if ((level != TP_EC_FAN_AUTO) &&
4961 (level != TP_EC_FAN_FULLSPEED) &&
4962 ((level < 0) || (level > 7)))
4963 return -EINVAL;
4964
4965 /* safety net should the EC not support AUTO
4966 * or FULLSPEED mode bits and just ignore them */
4967 if (level & TP_EC_FAN_FULLSPEED)
4968 level |= 7; /* safety min speed 7 */
4969 else if (level & TP_EC_FAN_AUTO)
4970 level |= 4; /* safety min speed 4 */
4971
4972 if (!acpi_ec_write(fan_status_offset, level))
4973 return -EIO;
4974 else
4975 tp_features.fan_ctrl_status_undef = 0;
4976 break;
4977
4978 default:
4979 return -ENXIO;
4980 }
4981 return 0;
4982 }
4983
4984 static int fan_set_level_safe(int level)
4985 {
4986 int rc;
4987
4988 if (!fan_control_allowed)
4989 return -EPERM;
4990
4991 if (mutex_lock_interruptible(&fan_mutex))
4992 return -ERESTARTSYS;
4993
4994 if (level == TPACPI_FAN_LAST_LEVEL)
4995 level = fan_control_desired_level;
4996
4997 rc = fan_set_level(level);
4998 if (!rc)
4999 fan_update_desired_level(level);
5000
5001 mutex_unlock(&fan_mutex);
5002 return rc;
5003 }
5004
5005 static int fan_set_enable(void)
5006 {
5007 u8 s;
5008 int rc;
5009
5010 if (!fan_control_allowed)
5011 return -EPERM;
5012
5013 if (mutex_lock_interruptible(&fan_mutex))
5014 return -ERESTARTSYS;
5015
5016 switch (fan_control_access_mode) {
5017 case TPACPI_FAN_WR_ACPI_FANS:
5018 case TPACPI_FAN_WR_TPEC:
5019 rc = fan_get_status(&s);
5020 if (rc < 0)
5021 break;
5022
5023 /* Don't go out of emergency fan mode */
5024 if (s != 7) {
5025 s &= 0x07;
5026 s |= TP_EC_FAN_AUTO | 4; /* min fan speed 4 */
5027 }
5028
5029 if (!acpi_ec_write(fan_status_offset, s))
5030 rc = -EIO;
5031 else {
5032 tp_features.fan_ctrl_status_undef = 0;
5033 rc = 0;
5034 }
5035 break;
5036
5037 case TPACPI_FAN_WR_ACPI_SFAN:
5038 rc = fan_get_status(&s);
5039 if (rc < 0)
5040 break;
5041
5042 s &= 0x07;
5043
5044 /* Set fan to at least level 4 */
5045 s |= 4;
5046
5047 if (!acpi_evalf(sfan_handle, NULL, NULL, "vd", s))
5048 rc = -EIO;
5049 else
5050 rc = 0;
5051 break;
5052
5053 default:
5054 rc = -ENXIO;
5055 }
5056
5057 mutex_unlock(&fan_mutex);
5058 return rc;
5059 }
5060
5061 static int fan_set_disable(void)
5062 {
5063 int rc;
5064
5065 if (!fan_control_allowed)
5066 return -EPERM;
5067
5068 if (mutex_lock_interruptible(&fan_mutex))
5069 return -ERESTARTSYS;
5070
5071 rc = 0;
5072 switch (fan_control_access_mode) {
5073 case TPACPI_FAN_WR_ACPI_FANS:
5074 case TPACPI_FAN_WR_TPEC:
5075 if (!acpi_ec_write(fan_status_offset, 0x00))
5076 rc = -EIO;
5077 else {
5078 fan_control_desired_level = 0;
5079 tp_features.fan_ctrl_status_undef = 0;
5080 }
5081 break;
5082
5083 case TPACPI_FAN_WR_ACPI_SFAN:
5084 if (!acpi_evalf(sfan_handle, NULL, NULL, "vd", 0x00))
5085 rc = -EIO;
5086 else
5087 fan_control_desired_level = 0;
5088 break;
5089
5090 default:
5091 rc = -ENXIO;
5092 }
5093
5094
5095 mutex_unlock(&fan_mutex);
5096 return rc;
5097 }
5098
5099 static int fan_set_speed(int speed)
5100 {
5101 int rc;
5102
5103 if (!fan_control_allowed)
5104 return -EPERM;
5105
5106 if (mutex_lock_interruptible(&fan_mutex))
5107 return -ERESTARTSYS;
5108
5109 rc = 0;
5110 switch (fan_control_access_mode) {
5111 case TPACPI_FAN_WR_ACPI_FANS:
5112 if (speed >= 0 && speed <= 65535) {
5113 if (!acpi_evalf(fans_handle, NULL, NULL, "vddd",
5114 speed, speed, speed))
5115 rc = -EIO;
5116 } else
5117 rc = -EINVAL;
5118 break;
5119
5120 default:
5121 rc = -ENXIO;
5122 }
5123
5124 mutex_unlock(&fan_mutex);
5125 return rc;
5126 }
5127
5128 static void fan_watchdog_reset(void)
5129 {
5130 static int fan_watchdog_active;
5131
5132 if (fan_control_access_mode == TPACPI_FAN_WR_NONE)
5133 return;
5134
5135 if (fan_watchdog_active)
5136 cancel_delayed_work(&fan_watchdog_task);
5137
5138 if (fan_watchdog_maxinterval > 0 &&
5139 tpacpi_lifecycle != TPACPI_LIFE_EXITING) {
5140 fan_watchdog_active = 1;
5141 if (!schedule_delayed_work(&fan_watchdog_task,
5142 msecs_to_jiffies(fan_watchdog_maxinterval
5143 * 1000))) {
5144 printk(TPACPI_ERR
5145 "failed to schedule the fan watchdog, "
5146 "watchdog will not trigger\n");
5147 }
5148 } else
5149 fan_watchdog_active = 0;
5150 }
5151
5152 static void fan_watchdog_fire(struct work_struct *ignored)
5153 {
5154 int rc;
5155
5156 if (tpacpi_lifecycle != TPACPI_LIFE_RUNNING)
5157 return;
5158
5159 printk(TPACPI_NOTICE "fan watchdog: enabling fan\n");
5160 rc = fan_set_enable();
5161 if (rc < 0) {
5162 printk(TPACPI_ERR "fan watchdog: error %d while enabling fan, "
5163 "will try again later...\n", -rc);
5164 /* reschedule for later */
5165 fan_watchdog_reset();
5166 }
5167 }
5168
5169 /*
5170 * SYSFS fan layout: hwmon compatible (device)
5171 *
5172 * pwm*_enable:
5173 * 0: "disengaged" mode
5174 * 1: manual mode
5175 * 2: native EC "auto" mode (recommended, hardware default)
5176 *
5177 * pwm*: set speed in manual mode, ignored otherwise.
5178 * 0 is level 0; 255 is level 7. Intermediate points done with linear
5179 * interpolation.
5180 *
5181 * fan*_input: tachometer reading, RPM
5182 *
5183 *
5184 * SYSFS fan layout: extensions
5185 *
5186 * fan_watchdog (driver):
5187 * fan watchdog interval in seconds, 0 disables (default), max 120
5188 */
5189
5190 /* sysfs fan pwm1_enable ----------------------------------------------- */
5191 static ssize_t fan_pwm1_enable_show(struct device *dev,
5192 struct device_attribute *attr,
5193 char *buf)
5194 {
5195 int res, mode;
5196 u8 status;
5197
5198 res = fan_get_status_safe(&status);
5199 if (res)
5200 return res;
5201
5202 if (unlikely(tp_features.fan_ctrl_status_undef)) {
5203 if (status != fan_control_initial_status) {
5204 tp_features.fan_ctrl_status_undef = 0;
5205 } else {
5206 /* Return most likely status. In fact, it
5207 * might be the only possible status */
5208 status = TP_EC_FAN_AUTO;
5209 }
5210 }
5211
5212 if (status & TP_EC_FAN_FULLSPEED) {
5213 mode = 0;
5214 } else if (status & TP_EC_FAN_AUTO) {
5215 mode = 2;
5216 } else
5217 mode = 1;
5218
5219 return snprintf(buf, PAGE_SIZE, "%d\n", mode);
5220 }
5221
5222 static ssize_t fan_pwm1_enable_store(struct device *dev,
5223 struct device_attribute *attr,
5224 const char *buf, size_t count)
5225 {
5226 unsigned long t;
5227 int res, level;
5228
5229 if (parse_strtoul(buf, 2, &t))
5230 return -EINVAL;
5231
5232 switch (t) {
5233 case 0:
5234 level = TP_EC_FAN_FULLSPEED;
5235 break;
5236 case 1:
5237 level = TPACPI_FAN_LAST_LEVEL;
5238 break;
5239 case 2:
5240 level = TP_EC_FAN_AUTO;
5241 break;
5242 case 3:
5243 /* reserved for software-controlled auto mode */
5244 return -ENOSYS;
5245 default:
5246 return -EINVAL;
5247 }
5248
5249 res = fan_set_level_safe(level);
5250 if (res == -ENXIO)
5251 return -EINVAL;
5252 else if (res < 0)
5253 return res;
5254
5255 fan_watchdog_reset();
5256
5257 return count;
5258 }
5259
5260 static struct device_attribute dev_attr_fan_pwm1_enable =
5261 __ATTR(pwm1_enable, S_IWUSR | S_IRUGO,
5262 fan_pwm1_enable_show, fan_pwm1_enable_store);
5263
5264 /* sysfs fan pwm1 ------------------------------------------------------ */
5265 static ssize_t fan_pwm1_show(struct device *dev,
5266 struct device_attribute *attr,
5267 char *buf)
5268 {
5269 int res;
5270 u8 status;
5271
5272 res = fan_get_status_safe(&status);
5273 if (res)
5274 return res;
5275
5276 if (unlikely(tp_features.fan_ctrl_status_undef)) {
5277 if (status != fan_control_initial_status) {
5278 tp_features.fan_ctrl_status_undef = 0;
5279 } else {
5280 status = TP_EC_FAN_AUTO;
5281 }
5282 }
5283
5284 if ((status &
5285 (TP_EC_FAN_AUTO | TP_EC_FAN_FULLSPEED)) != 0)
5286 status = fan_control_desired_level;
5287
5288 if (status > 7)
5289 status = 7;
5290
5291 return snprintf(buf, PAGE_SIZE, "%u\n", (status * 255) / 7);
5292 }
5293
5294 static ssize_t fan_pwm1_store(struct device *dev,
5295 struct device_attribute *attr,
5296 const char *buf, size_t count)
5297 {
5298 unsigned long s;
5299 int rc;
5300 u8 status, newlevel;
5301
5302 if (parse_strtoul(buf, 255, &s))
5303 return -EINVAL;
5304
5305 /* scale down from 0-255 to 0-7 */
5306 newlevel = (s >> 5) & 0x07;
5307
5308 if (mutex_lock_interruptible(&fan_mutex))
5309 return -ERESTARTSYS;
5310
5311 rc = fan_get_status(&status);
5312 if (!rc && (status &
5313 (TP_EC_FAN_AUTO | TP_EC_FAN_FULLSPEED)) == 0) {
5314 rc = fan_set_level(newlevel);
5315 if (rc == -ENXIO)
5316 rc = -EINVAL;
5317 else if (!rc) {
5318 fan_update_desired_level(newlevel);
5319 fan_watchdog_reset();
5320 }
5321 }
5322
5323 mutex_unlock(&fan_mutex);
5324 return (rc)? rc : count;
5325 }
5326
5327 static struct device_attribute dev_attr_fan_pwm1 =
5328 __ATTR(pwm1, S_IWUSR | S_IRUGO,
5329 fan_pwm1_show, fan_pwm1_store);
5330
5331 /* sysfs fan fan1_input ------------------------------------------------ */
5332 static ssize_t fan_fan1_input_show(struct device *dev,
5333 struct device_attribute *attr,
5334 char *buf)
5335 {
5336 int res;
5337 unsigned int speed;
5338
5339 res = fan_get_speed(&speed);
5340 if (res < 0)
5341 return res;
5342
5343 return snprintf(buf, PAGE_SIZE, "%u\n", speed);
5344 }
5345
5346 static struct device_attribute dev_attr_fan_fan1_input =
5347 __ATTR(fan1_input, S_IRUGO,
5348 fan_fan1_input_show, NULL);
5349
5350 /* sysfs fan fan_watchdog (hwmon driver) ------------------------------- */
5351 static ssize_t fan_fan_watchdog_show(struct device_driver *drv,
5352 char *buf)
5353 {
5354 return snprintf(buf, PAGE_SIZE, "%u\n", fan_watchdog_maxinterval);
5355 }
5356
5357 static ssize_t fan_fan_watchdog_store(struct device_driver *drv,
5358 const char *buf, size_t count)
5359 {
5360 unsigned long t;
5361
5362 if (parse_strtoul(buf, 120, &t))
5363 return -EINVAL;
5364
5365 if (!fan_control_allowed)
5366 return -EPERM;
5367
5368 fan_watchdog_maxinterval = t;
5369 fan_watchdog_reset();
5370
5371 return count;
5372 }
5373
5374 static DRIVER_ATTR(fan_watchdog, S_IWUSR | S_IRUGO,
5375 fan_fan_watchdog_show, fan_fan_watchdog_store);
5376
5377 /* --------------------------------------------------------------------- */
5378 static struct attribute *fan_attributes[] = {
5379 &dev_attr_fan_pwm1_enable.attr, &dev_attr_fan_pwm1.attr,
5380 &dev_attr_fan_fan1_input.attr,
5381 NULL
5382 };
5383
5384 static const struct attribute_group fan_attr_group = {
5385 .attrs = fan_attributes,
5386 };
5387
5388 static int __init fan_init(struct ibm_init_struct *iibm)
5389 {
5390 int rc;
5391
5392 vdbg_printk(TPACPI_DBG_INIT, "initializing fan subdriver\n");
5393
5394 mutex_init(&fan_mutex);
5395 fan_status_access_mode = TPACPI_FAN_NONE;
5396 fan_control_access_mode = TPACPI_FAN_WR_NONE;
5397 fan_control_commands = 0;
5398 fan_watchdog_maxinterval = 0;
5399 tp_features.fan_ctrl_status_undef = 0;
5400 fan_control_desired_level = 7;
5401
5402 TPACPI_ACPIHANDLE_INIT(fans);
5403 TPACPI_ACPIHANDLE_INIT(gfan);
5404 TPACPI_ACPIHANDLE_INIT(sfan);
5405
5406 if (gfan_handle) {
5407 /* 570, 600e/x, 770e, 770x */
5408 fan_status_access_mode = TPACPI_FAN_RD_ACPI_GFAN;
5409 } else {
5410 /* all other ThinkPads: note that even old-style
5411 * ThinkPad ECs supports the fan control register */
5412 if (likely(acpi_ec_read(fan_status_offset,
5413 &fan_control_initial_status))) {
5414 fan_status_access_mode = TPACPI_FAN_RD_TPEC;
5415
5416 /* In some ThinkPads, neither the EC nor the ACPI
5417 * DSDT initialize the fan status, and it ends up
5418 * being set to 0x07 when it *could* be either
5419 * 0x07 or 0x80.
5420 *
5421 * Enable for TP-1Y (T43), TP-78 (R51e),
5422 * TP-76 (R52), TP-70 (T43, R52), which are known
5423 * to be buggy. */
5424 if (fan_control_initial_status == 0x07) {
5425 switch (thinkpad_id.ec_model) {
5426 case 0x5931: /* TP-1Y */
5427 case 0x3837: /* TP-78 */
5428 case 0x3637: /* TP-76 */
5429 case 0x3037: /* TP-70 */
5430 printk(TPACPI_NOTICE
5431 "fan_init: initial fan status "
5432 "is unknown, assuming it is "
5433 "in auto mode\n");
5434 tp_features.fan_ctrl_status_undef = 1;
5435 ;;
5436 }
5437 }
5438 } else {
5439 printk(TPACPI_ERR
5440 "ThinkPad ACPI EC access misbehaving, "
5441 "fan status and control unavailable\n");
5442 return 1;
5443 }
5444 }
5445
5446 if (sfan_handle) {
5447 /* 570, 770x-JL */
5448 fan_control_access_mode = TPACPI_FAN_WR_ACPI_SFAN;
5449 fan_control_commands |=
5450 TPACPI_FAN_CMD_LEVEL | TPACPI_FAN_CMD_ENABLE;
5451 } else {
5452 if (!gfan_handle) {
5453 /* gfan without sfan means no fan control */
5454 /* all other models implement TP EC 0x2f control */
5455
5456 if (fans_handle) {
5457 /* X31, X40, X41 */
5458 fan_control_access_mode =
5459 TPACPI_FAN_WR_ACPI_FANS;
5460 fan_control_commands |=
5461 TPACPI_FAN_CMD_SPEED |
5462 TPACPI_FAN_CMD_LEVEL |
5463 TPACPI_FAN_CMD_ENABLE;
5464 } else {
5465 fan_control_access_mode = TPACPI_FAN_WR_TPEC;
5466 fan_control_commands |=
5467 TPACPI_FAN_CMD_LEVEL |
5468 TPACPI_FAN_CMD_ENABLE;
5469 }
5470 }
5471 }
5472
5473 vdbg_printk(TPACPI_DBG_INIT, "fan is %s, modes %d, %d\n",
5474 str_supported(fan_status_access_mode != TPACPI_FAN_NONE ||
5475 fan_control_access_mode != TPACPI_FAN_WR_NONE),
5476 fan_status_access_mode, fan_control_access_mode);
5477
5478 /* fan control master switch */
5479 if (!fan_control_allowed) {
5480 fan_control_access_mode = TPACPI_FAN_WR_NONE;
5481 fan_control_commands = 0;
5482 dbg_printk(TPACPI_DBG_INIT,
5483 "fan control features disabled by parameter\n");
5484 }
5485
5486 /* update fan_control_desired_level */
5487 if (fan_status_access_mode != TPACPI_FAN_NONE)
5488 fan_get_status_safe(NULL);
5489
5490 if (fan_status_access_mode != TPACPI_FAN_NONE ||
5491 fan_control_access_mode != TPACPI_FAN_WR_NONE) {
5492 rc = sysfs_create_group(&tpacpi_sensors_pdev->dev.kobj,
5493 &fan_attr_group);
5494 if (!(rc < 0))
5495 rc = driver_create_file(&tpacpi_hwmon_pdriver.driver,
5496 &driver_attr_fan_watchdog);
5497 if (rc < 0)
5498 return rc;
5499 return 0;
5500 } else
5501 return 1;
5502 }
5503
5504 static void fan_exit(void)
5505 {
5506 vdbg_printk(TPACPI_DBG_EXIT,
5507 "cancelling any pending fan watchdog tasks\n");
5508
5509 /* FIXME: can we really do this unconditionally? */
5510 sysfs_remove_group(&tpacpi_sensors_pdev->dev.kobj, &fan_attr_group);
5511 driver_remove_file(&tpacpi_hwmon_pdriver.driver,
5512 &driver_attr_fan_watchdog);
5513
5514 cancel_delayed_work(&fan_watchdog_task);
5515 flush_scheduled_work();
5516 }
5517
5518 static int fan_read(char *p)
5519 {
5520 int len = 0;
5521 int rc;
5522 u8 status;
5523 unsigned int speed = 0;
5524
5525 switch (fan_status_access_mode) {
5526 case TPACPI_FAN_RD_ACPI_GFAN:
5527 /* 570, 600e/x, 770e, 770x */
5528 rc = fan_get_status_safe(&status);
5529 if (rc < 0)
5530 return rc;
5531
5532 len += sprintf(p + len, "status:\t\t%s\n"
5533 "level:\t\t%d\n",
5534 (status != 0) ? "enabled" : "disabled", status);
5535 break;
5536
5537 case TPACPI_FAN_RD_TPEC:
5538 /* all except 570, 600e/x, 770e, 770x */
5539 rc = fan_get_status_safe(&status);
5540 if (rc < 0)
5541 return rc;
5542
5543 if (unlikely(tp_features.fan_ctrl_status_undef)) {
5544 if (status != fan_control_initial_status)
5545 tp_features.fan_ctrl_status_undef = 0;
5546 else
5547 /* Return most likely status. In fact, it
5548 * might be the only possible status */
5549 status = TP_EC_FAN_AUTO;
5550 }
5551
5552 len += sprintf(p + len, "status:\t\t%s\n",
5553 (status != 0) ? "enabled" : "disabled");
5554
5555 rc = fan_get_speed(&speed);
5556 if (rc < 0)
5557 return rc;
5558
5559 len += sprintf(p + len, "speed:\t\t%d\n", speed);
5560
5561 if (status & TP_EC_FAN_FULLSPEED)
5562 /* Disengaged mode takes precedence */
5563 len += sprintf(p + len, "level:\t\tdisengaged\n");
5564 else if (status & TP_EC_FAN_AUTO)
5565 len += sprintf(p + len, "level:\t\tauto\n");
5566 else
5567 len += sprintf(p + len, "level:\t\t%d\n", status);
5568 break;
5569
5570 case TPACPI_FAN_NONE:
5571 default:
5572 len += sprintf(p + len, "status:\t\tnot supported\n");
5573 }
5574
5575 if (fan_control_commands & TPACPI_FAN_CMD_LEVEL) {
5576 len += sprintf(p + len, "commands:\tlevel <level>");
5577
5578 switch (fan_control_access_mode) {
5579 case TPACPI_FAN_WR_ACPI_SFAN:
5580 len += sprintf(p + len, " (<level> is 0-7)\n");
5581 break;
5582
5583 default:
5584 len += sprintf(p + len, " (<level> is 0-7, "
5585 "auto, disengaged, full-speed)\n");
5586 break;
5587 }
5588 }
5589
5590 if (fan_control_commands & TPACPI_FAN_CMD_ENABLE)
5591 len += sprintf(p + len, "commands:\tenable, disable\n"
5592 "commands:\twatchdog <timeout> (<timeout> "
5593 "is 0 (off), 1-120 (seconds))\n");
5594
5595 if (fan_control_commands & TPACPI_FAN_CMD_SPEED)
5596 len += sprintf(p + len, "commands:\tspeed <speed>"
5597 " (<speed> is 0-65535)\n");
5598
5599 return len;
5600 }
5601
5602 static int fan_write_cmd_level(const char *cmd, int *rc)
5603 {
5604 int level;
5605
5606 if (strlencmp(cmd, "level auto") == 0)
5607 level = TP_EC_FAN_AUTO;
5608 else if ((strlencmp(cmd, "level disengaged") == 0) |
5609 (strlencmp(cmd, "level full-speed") == 0))
5610 level = TP_EC_FAN_FULLSPEED;
5611 else if (sscanf(cmd, "level %d", &level) != 1)
5612 return 0;
5613
5614 *rc = fan_set_level_safe(level);
5615 if (*rc == -ENXIO)
5616 printk(TPACPI_ERR "level command accepted for unsupported "
5617 "access mode %d", fan_control_access_mode);
5618
5619 return 1;
5620 }
5621
5622 static int fan_write_cmd_enable(const char *cmd, int *rc)
5623 {
5624 if (strlencmp(cmd, "enable") != 0)
5625 return 0;
5626
5627 *rc = fan_set_enable();
5628 if (*rc == -ENXIO)
5629 printk(TPACPI_ERR "enable command accepted for unsupported "
5630 "access mode %d", fan_control_access_mode);
5631
5632 return 1;
5633 }
5634
5635 static int fan_write_cmd_disable(const char *cmd, int *rc)
5636 {
5637 if (strlencmp(cmd, "disable") != 0)
5638 return 0;
5639
5640 *rc = fan_set_disable();
5641 if (*rc == -ENXIO)
5642 printk(TPACPI_ERR "disable command accepted for unsupported "
5643 "access mode %d", fan_control_access_mode);
5644
5645 return 1;
5646 }
5647
5648 static int fan_write_cmd_speed(const char *cmd, int *rc)
5649 {
5650 int speed;
5651
5652 /* TODO:
5653 * Support speed <low> <medium> <high> ? */
5654
5655 if (sscanf(cmd, "speed %d", &speed) != 1)
5656 return 0;
5657
5658 *rc = fan_set_speed(speed);
5659 if (*rc == -ENXIO)
5660 printk(TPACPI_ERR "speed command accepted for unsupported "
5661 "access mode %d", fan_control_access_mode);
5662
5663 return 1;
5664 }
5665
5666 static int fan_write_cmd_watchdog(const char *cmd, int *rc)
5667 {
5668 int interval;
5669
5670 if (sscanf(cmd, "watchdog %d", &interval) != 1)
5671 return 0;
5672
5673 if (interval < 0 || interval > 120)
5674 *rc = -EINVAL;
5675 else
5676 fan_watchdog_maxinterval = interval;
5677
5678 return 1;
5679 }
5680
5681 static int fan_write(char *buf)
5682 {
5683 char *cmd;
5684 int rc = 0;
5685
5686 while (!rc && (cmd = next_cmd(&buf))) {
5687 if (!((fan_control_commands & TPACPI_FAN_CMD_LEVEL) &&
5688 fan_write_cmd_level(cmd, &rc)) &&
5689 !((fan_control_commands & TPACPI_FAN_CMD_ENABLE) &&
5690 (fan_write_cmd_enable(cmd, &rc) ||
5691 fan_write_cmd_disable(cmd, &rc) ||
5692 fan_write_cmd_watchdog(cmd, &rc))) &&
5693 !((fan_control_commands & TPACPI_FAN_CMD_SPEED) &&
5694 fan_write_cmd_speed(cmd, &rc))
5695 )
5696 rc = -EINVAL;
5697 else if (!rc)
5698 fan_watchdog_reset();
5699 }
5700
5701 return rc;
5702 }
5703
5704 static struct ibm_struct fan_driver_data = {
5705 .name = "fan",
5706 .read = fan_read,
5707 .write = fan_write,
5708 .exit = fan_exit,
5709 };
5710
5711 /****************************************************************************
5712 ****************************************************************************
5713 *
5714 * Infrastructure
5715 *
5716 ****************************************************************************
5717 ****************************************************************************/
5718
5719 /* sysfs name ---------------------------------------------------------- */
5720 static ssize_t thinkpad_acpi_pdev_name_show(struct device *dev,
5721 struct device_attribute *attr,
5722 char *buf)
5723 {
5724 return snprintf(buf, PAGE_SIZE, "%s\n", TPACPI_NAME);
5725 }
5726
5727 static struct device_attribute dev_attr_thinkpad_acpi_pdev_name =
5728 __ATTR(name, S_IRUGO, thinkpad_acpi_pdev_name_show, NULL);
5729
5730 /* --------------------------------------------------------------------- */
5731
5732 /* /proc support */
5733 static struct proc_dir_entry *proc_dir;
5734
5735 /*
5736 * Module and infrastructure proble, init and exit handling
5737 */
5738
5739 static int force_load;
5740
5741 #ifdef CONFIG_THINKPAD_ACPI_DEBUG
5742 static const char * __init str_supported(int is_supported)
5743 {
5744 static char text_unsupported[] __initdata = "not supported";
5745
5746 return (is_supported)? &text_unsupported[4] : &text_unsupported[0];
5747 }
5748 #endif /* CONFIG_THINKPAD_ACPI_DEBUG */
5749
5750 static void ibm_exit(struct ibm_struct *ibm)
5751 {
5752 dbg_printk(TPACPI_DBG_EXIT, "removing %s\n", ibm->name);
5753
5754 list_del_init(&ibm->all_drivers);
5755
5756 if (ibm->flags.acpi_notify_installed) {
5757 dbg_printk(TPACPI_DBG_EXIT,
5758 "%s: acpi_remove_notify_handler\n", ibm->name);
5759 BUG_ON(!ibm->acpi);
5760 acpi_remove_notify_handler(*ibm->acpi->handle,
5761 ibm->acpi->type,
5762 dispatch_acpi_notify);
5763 ibm->flags.acpi_notify_installed = 0;
5764 ibm->flags.acpi_notify_installed = 0;
5765 }
5766
5767 if (ibm->flags.proc_created) {
5768 dbg_printk(TPACPI_DBG_EXIT,
5769 "%s: remove_proc_entry\n", ibm->name);
5770 remove_proc_entry(ibm->name, proc_dir);
5771 ibm->flags.proc_created = 0;
5772 }
5773
5774 if (ibm->flags.acpi_driver_registered) {
5775 dbg_printk(TPACPI_DBG_EXIT,
5776 "%s: acpi_bus_unregister_driver\n", ibm->name);
5777 BUG_ON(!ibm->acpi);
5778 acpi_bus_unregister_driver(ibm->acpi->driver);
5779 kfree(ibm->acpi->driver);
5780 ibm->acpi->driver = NULL;
5781 ibm->flags.acpi_driver_registered = 0;
5782 }
5783
5784 if (ibm->flags.init_called && ibm->exit) {
5785 ibm->exit();
5786 ibm->flags.init_called = 0;
5787 }
5788
5789 dbg_printk(TPACPI_DBG_INIT, "finished removing %s\n", ibm->name);
5790 }
5791
5792 static int __init ibm_init(struct ibm_init_struct *iibm)
5793 {
5794 int ret;
5795 struct ibm_struct *ibm = iibm->data;
5796 struct proc_dir_entry *entry;
5797
5798 BUG_ON(ibm == NULL);
5799
5800 INIT_LIST_HEAD(&ibm->all_drivers);
5801
5802 if (ibm->flags.experimental && !experimental)
5803 return 0;
5804
5805 dbg_printk(TPACPI_DBG_INIT,
5806 "probing for %s\n", ibm->name);
5807
5808 if (iibm->init) {
5809 ret = iibm->init(iibm);
5810 if (ret > 0)
5811 return 0; /* probe failed */
5812 if (ret)
5813 return ret;
5814
5815 ibm->flags.init_called = 1;
5816 }
5817
5818 if (ibm->acpi) {
5819 if (ibm->acpi->hid) {
5820 ret = register_tpacpi_subdriver(ibm);
5821 if (ret)
5822 goto err_out;
5823 }
5824
5825 if (ibm->acpi->notify) {
5826 ret = setup_acpi_notify(ibm);
5827 if (ret == -ENODEV) {
5828 printk(TPACPI_NOTICE "disabling subdriver %s\n",
5829 ibm->name);
5830 ret = 0;
5831 goto err_out;
5832 }
5833 if (ret < 0)
5834 goto err_out;
5835 }
5836 }
5837
5838 dbg_printk(TPACPI_DBG_INIT,
5839 "%s installed\n", ibm->name);
5840
5841 if (ibm->read) {
5842 entry = create_proc_entry(ibm->name,
5843 S_IFREG | S_IRUGO | S_IWUSR,
5844 proc_dir);
5845 if (!entry) {
5846 printk(TPACPI_ERR "unable to create proc entry %s\n",
5847 ibm->name);
5848 ret = -ENODEV;
5849 goto err_out;
5850 }
5851 entry->owner = THIS_MODULE;
5852 entry->data = ibm;
5853 entry->read_proc = &dispatch_procfs_read;
5854 if (ibm->write)
5855 entry->write_proc = &dispatch_procfs_write;
5856 ibm->flags.proc_created = 1;
5857 }
5858
5859 list_add_tail(&ibm->all_drivers, &tpacpi_all_drivers);
5860
5861 return 0;
5862
5863 err_out:
5864 dbg_printk(TPACPI_DBG_INIT,
5865 "%s: at error exit path with result %d\n",
5866 ibm->name, ret);
5867
5868 ibm_exit(ibm);
5869 return (ret < 0)? ret : 0;
5870 }
5871
5872 /* Probing */
5873
5874 static void __init get_thinkpad_model_data(struct thinkpad_id_data *tp)
5875 {
5876 const struct dmi_device *dev = NULL;
5877 char ec_fw_string[18];
5878
5879 if (!tp)
5880 return;
5881
5882 memset(tp, 0, sizeof(*tp));
5883
5884 if (dmi_name_in_vendors("IBM"))
5885 tp->vendor = PCI_VENDOR_ID_IBM;
5886 else if (dmi_name_in_vendors("LENOVO"))
5887 tp->vendor = PCI_VENDOR_ID_LENOVO;
5888 else
5889 return;
5890
5891 tp->bios_version_str = kstrdup(dmi_get_system_info(DMI_BIOS_VERSION),
5892 GFP_KERNEL);
5893 if (!tp->bios_version_str)
5894 return;
5895 tp->bios_model = tp->bios_version_str[0]
5896 | (tp->bios_version_str[1] << 8);
5897
5898 /*
5899 * ThinkPad T23 or newer, A31 or newer, R50e or newer,
5900 * X32 or newer, all Z series; Some models must have an
5901 * up-to-date BIOS or they will not be detected.
5902 *
5903 * See http://thinkwiki.org/wiki/List_of_DMI_IDs
5904 */
5905 while ((dev = dmi_find_device(DMI_DEV_TYPE_OEM_STRING, NULL, dev))) {
5906 if (sscanf(dev->name,
5907 "IBM ThinkPad Embedded Controller -[%17c",
5908 ec_fw_string) == 1) {
5909 ec_fw_string[sizeof(ec_fw_string) - 1] = 0;
5910 ec_fw_string[strcspn(ec_fw_string, " ]")] = 0;
5911
5912 tp->ec_version_str = kstrdup(ec_fw_string, GFP_KERNEL);
5913 tp->ec_model = ec_fw_string[0]
5914 | (ec_fw_string[1] << 8);
5915 break;
5916 }
5917 }
5918
5919 tp->model_str = kstrdup(dmi_get_system_info(DMI_PRODUCT_VERSION),
5920 GFP_KERNEL);
5921 if (tp->model_str && strnicmp(tp->model_str, "ThinkPad", 8) != 0) {
5922 kfree(tp->model_str);
5923 tp->model_str = NULL;
5924 }
5925
5926 tp->nummodel_str = kstrdup(dmi_get_system_info(DMI_PRODUCT_NAME),
5927 GFP_KERNEL);
5928 }
5929
5930 static int __init probe_for_thinkpad(void)
5931 {
5932 int is_thinkpad;
5933
5934 if (acpi_disabled)
5935 return -ENODEV;
5936
5937 /*
5938 * Non-ancient models have better DMI tagging, but very old models
5939 * don't.
5940 */
5941 is_thinkpad = (thinkpad_id.model_str != NULL);
5942
5943 /* ec is required because many other handles are relative to it */
5944 TPACPI_ACPIHANDLE_INIT(ec);
5945 if (!ec_handle) {
5946 if (is_thinkpad)
5947 printk(TPACPI_ERR
5948 "Not yet supported ThinkPad detected!\n");
5949 return -ENODEV;
5950 }
5951
5952 /*
5953 * Risks a regression on very old machines, but reduces potential
5954 * false positives a damn great deal
5955 */
5956 if (!is_thinkpad)
5957 is_thinkpad = (thinkpad_id.vendor == PCI_VENDOR_ID_IBM);
5958
5959 if (!is_thinkpad && !force_load)
5960 return -ENODEV;
5961
5962 return 0;
5963 }
5964
5965
5966 /* Module init, exit, parameters */
5967
5968 static struct ibm_init_struct ibms_init[] __initdata = {
5969 {
5970 .init = thinkpad_acpi_driver_init,
5971 .data = &thinkpad_acpi_driver_data,
5972 },
5973 {
5974 .init = hotkey_init,
5975 .data = &hotkey_driver_data,
5976 },
5977 {
5978 .init = bluetooth_init,
5979 .data = &bluetooth_driver_data,
5980 },
5981 {
5982 .init = wan_init,
5983 .data = &wan_driver_data,
5984 },
5985 #ifdef CONFIG_THINKPAD_ACPI_VIDEO
5986 {
5987 .init = video_init,
5988 .data = &video_driver_data,
5989 },
5990 #endif
5991 {
5992 .init = light_init,
5993 .data = &light_driver_data,
5994 },
5995 #ifdef CONFIG_THINKPAD_ACPI_DOCK
5996 {
5997 .init = dock_init,
5998 .data = &dock_driver_data[0],
5999 },
6000 {
6001 .init = dock_init2,
6002 .data = &dock_driver_data[1],
6003 },
6004 #endif
6005 #ifdef CONFIG_THINKPAD_ACPI_BAY
6006 {
6007 .init = bay_init,
6008 .data = &bay_driver_data,
6009 },
6010 #endif
6011 {
6012 .init = cmos_init,
6013 .data = &cmos_driver_data,
6014 },
6015 {
6016 .init = led_init,
6017 .data = &led_driver_data,
6018 },
6019 {
6020 .init = beep_init,
6021 .data = &beep_driver_data,
6022 },
6023 {
6024 .init = thermal_init,
6025 .data = &thermal_driver_data,
6026 },
6027 {
6028 .data = &ecdump_driver_data,
6029 },
6030 {
6031 .init = brightness_init,
6032 .data = &brightness_driver_data,
6033 },
6034 {
6035 .data = &volume_driver_data,
6036 },
6037 {
6038 .init = fan_init,
6039 .data = &fan_driver_data,
6040 },
6041 };
6042
6043 static int __init set_ibm_param(const char *val, struct kernel_param *kp)
6044 {
6045 unsigned int i;
6046 struct ibm_struct *ibm;
6047
6048 if (!kp || !kp->name || !val)
6049 return -EINVAL;
6050
6051 for (i = 0; i < ARRAY_SIZE(ibms_init); i++) {
6052 ibm = ibms_init[i].data;
6053 WARN_ON(ibm == NULL);
6054
6055 if (!ibm || !ibm->name)
6056 continue;
6057
6058 if (strcmp(ibm->name, kp->name) == 0 && ibm->write) {
6059 if (strlen(val) > sizeof(ibms_init[i].param) - 2)
6060 return -ENOSPC;
6061 strcpy(ibms_init[i].param, val);
6062 strcat(ibms_init[i].param, ",");
6063 return 0;
6064 }
6065 }
6066
6067 return -EINVAL;
6068 }
6069
6070 module_param(experimental, int, 0);
6071 MODULE_PARM_DESC(experimental,
6072 "Enables experimental features when non-zero");
6073
6074 module_param_named(debug, dbg_level, uint, 0);
6075 MODULE_PARM_DESC(debug, "Sets debug level bit-mask");
6076
6077 module_param(force_load, bool, 0);
6078 MODULE_PARM_DESC(force_load,
6079 "Attempts to load the driver even on a "
6080 "mis-identified ThinkPad when true");
6081
6082 module_param_named(fan_control, fan_control_allowed, bool, 0);
6083 MODULE_PARM_DESC(fan_control,
6084 "Enables setting fan parameters features when true");
6085
6086 module_param_named(brightness_mode, brightness_mode, int, 0);
6087 MODULE_PARM_DESC(brightness_mode,
6088 "Selects brightness control strategy: "
6089 "0=auto, 1=EC, 2=CMOS, 3=both");
6090
6091 module_param(brightness_enable, uint, 0);
6092 MODULE_PARM_DESC(brightness_enable,
6093 "Enables backlight control when 1, disables when 0");
6094
6095 module_param(hotkey_report_mode, uint, 0);
6096 MODULE_PARM_DESC(hotkey_report_mode,
6097 "used for backwards compatibility with userspace, "
6098 "see documentation");
6099
6100 #define TPACPI_PARAM(feature) \
6101 module_param_call(feature, set_ibm_param, NULL, NULL, 0); \
6102 MODULE_PARM_DESC(feature, "Simulates thinkpad-acpi procfs command " \
6103 "at module load, see documentation")
6104
6105 TPACPI_PARAM(hotkey);
6106 TPACPI_PARAM(bluetooth);
6107 TPACPI_PARAM(video);
6108 TPACPI_PARAM(light);
6109 #ifdef CONFIG_THINKPAD_ACPI_DOCK
6110 TPACPI_PARAM(dock);
6111 #endif
6112 #ifdef CONFIG_THINKPAD_ACPI_BAY
6113 TPACPI_PARAM(bay);
6114 #endif /* CONFIG_THINKPAD_ACPI_BAY */
6115 TPACPI_PARAM(cmos);
6116 TPACPI_PARAM(led);
6117 TPACPI_PARAM(beep);
6118 TPACPI_PARAM(ecdump);
6119 TPACPI_PARAM(brightness);
6120 TPACPI_PARAM(volume);
6121 TPACPI_PARAM(fan);
6122
6123 static void thinkpad_acpi_module_exit(void)
6124 {
6125 struct ibm_struct *ibm, *itmp;
6126
6127 tpacpi_lifecycle = TPACPI_LIFE_EXITING;
6128
6129 list_for_each_entry_safe_reverse(ibm, itmp,
6130 &tpacpi_all_drivers,
6131 all_drivers) {
6132 ibm_exit(ibm);
6133 }
6134
6135 dbg_printk(TPACPI_DBG_INIT, "finished subdriver exit path...\n");
6136
6137 if (tpacpi_inputdev) {
6138 if (tp_features.input_device_registered)
6139 input_unregister_device(tpacpi_inputdev);
6140 else
6141 input_free_device(tpacpi_inputdev);
6142 }
6143
6144 if (tpacpi_hwmon)
6145 hwmon_device_unregister(tpacpi_hwmon);
6146
6147 if (tp_features.sensors_pdev_attrs_registered)
6148 device_remove_file(&tpacpi_sensors_pdev->dev,
6149 &dev_attr_thinkpad_acpi_pdev_name);
6150 if (tpacpi_sensors_pdev)
6151 platform_device_unregister(tpacpi_sensors_pdev);
6152 if (tpacpi_pdev)
6153 platform_device_unregister(tpacpi_pdev);
6154
6155 if (tp_features.sensors_pdrv_attrs_registered)
6156 tpacpi_remove_driver_attributes(&tpacpi_hwmon_pdriver.driver);
6157 if (tp_features.platform_drv_attrs_registered)
6158 tpacpi_remove_driver_attributes(&tpacpi_pdriver.driver);
6159
6160 if (tp_features.sensors_pdrv_registered)
6161 platform_driver_unregister(&tpacpi_hwmon_pdriver);
6162
6163 if (tp_features.platform_drv_registered)
6164 platform_driver_unregister(&tpacpi_pdriver);
6165
6166 if (proc_dir)
6167 remove_proc_entry(TPACPI_PROC_DIR, acpi_root_dir);
6168
6169 kfree(thinkpad_id.bios_version_str);
6170 kfree(thinkpad_id.ec_version_str);
6171 kfree(thinkpad_id.model_str);
6172 }
6173
6174
6175 static int __init thinkpad_acpi_module_init(void)
6176 {
6177 int ret, i;
6178
6179 tpacpi_lifecycle = TPACPI_LIFE_INIT;
6180
6181 /* Parameter checking */
6182 if (hotkey_report_mode > 2)
6183 return -EINVAL;
6184
6185 /* Driver-level probe */
6186
6187 get_thinkpad_model_data(&thinkpad_id);
6188 ret = probe_for_thinkpad();
6189 if (ret) {
6190 thinkpad_acpi_module_exit();
6191 return ret;
6192 }
6193
6194 /* Driver initialization */
6195
6196 TPACPI_ACPIHANDLE_INIT(ecrd);
6197 TPACPI_ACPIHANDLE_INIT(ecwr);
6198
6199 proc_dir = proc_mkdir(TPACPI_PROC_DIR, acpi_root_dir);
6200 if (!proc_dir) {
6201 printk(TPACPI_ERR
6202 "unable to create proc dir " TPACPI_PROC_DIR);
6203 thinkpad_acpi_module_exit();
6204 return -ENODEV;
6205 }
6206 proc_dir->owner = THIS_MODULE;
6207
6208 ret = platform_driver_register(&tpacpi_pdriver);
6209 if (ret) {
6210 printk(TPACPI_ERR
6211 "unable to register main platform driver\n");
6212 thinkpad_acpi_module_exit();
6213 return ret;
6214 }
6215 tp_features.platform_drv_registered = 1;
6216
6217 ret = platform_driver_register(&tpacpi_hwmon_pdriver);
6218 if (ret) {
6219 printk(TPACPI_ERR
6220 "unable to register hwmon platform driver\n");
6221 thinkpad_acpi_module_exit();
6222 return ret;
6223 }
6224 tp_features.sensors_pdrv_registered = 1;
6225
6226 ret = tpacpi_create_driver_attributes(&tpacpi_pdriver.driver);
6227 if (!ret) {
6228 tp_features.platform_drv_attrs_registered = 1;
6229 ret = tpacpi_create_driver_attributes(
6230 &tpacpi_hwmon_pdriver.driver);
6231 }
6232 if (ret) {
6233 printk(TPACPI_ERR
6234 "unable to create sysfs driver attributes\n");
6235 thinkpad_acpi_module_exit();
6236 return ret;
6237 }
6238 tp_features.sensors_pdrv_attrs_registered = 1;
6239
6240
6241 /* Device initialization */
6242 tpacpi_pdev = platform_device_register_simple(TPACPI_DRVR_NAME, -1,
6243 NULL, 0);
6244 if (IS_ERR(tpacpi_pdev)) {
6245 ret = PTR_ERR(tpacpi_pdev);
6246 tpacpi_pdev = NULL;
6247 printk(TPACPI_ERR "unable to register platform device\n");
6248 thinkpad_acpi_module_exit();
6249 return ret;
6250 }
6251 tpacpi_sensors_pdev = platform_device_register_simple(
6252 TPACPI_HWMON_DRVR_NAME,
6253 -1, NULL, 0);
6254 if (IS_ERR(tpacpi_sensors_pdev)) {
6255 ret = PTR_ERR(tpacpi_sensors_pdev);
6256 tpacpi_sensors_pdev = NULL;
6257 printk(TPACPI_ERR
6258 "unable to register hwmon platform device\n");
6259 thinkpad_acpi_module_exit();
6260 return ret;
6261 }
6262 ret = device_create_file(&tpacpi_sensors_pdev->dev,
6263 &dev_attr_thinkpad_acpi_pdev_name);
6264 if (ret) {
6265 printk(TPACPI_ERR
6266 "unable to create sysfs hwmon device attributes\n");
6267 thinkpad_acpi_module_exit();
6268 return ret;
6269 }
6270 tp_features.sensors_pdev_attrs_registered = 1;
6271 tpacpi_hwmon = hwmon_device_register(&tpacpi_sensors_pdev->dev);
6272 if (IS_ERR(tpacpi_hwmon)) {
6273 ret = PTR_ERR(tpacpi_hwmon);
6274 tpacpi_hwmon = NULL;
6275 printk(TPACPI_ERR "unable to register hwmon device\n");
6276 thinkpad_acpi_module_exit();
6277 return ret;
6278 }
6279 mutex_init(&tpacpi_inputdev_send_mutex);
6280 tpacpi_inputdev = input_allocate_device();
6281 if (!tpacpi_inputdev) {
6282 printk(TPACPI_ERR "unable to allocate input device\n");
6283 thinkpad_acpi_module_exit();
6284 return -ENOMEM;
6285 } else {
6286 /* Prepare input device, but don't register */
6287 tpacpi_inputdev->name = "ThinkPad Extra Buttons";
6288 tpacpi_inputdev->phys = TPACPI_DRVR_NAME "/input0";
6289 tpacpi_inputdev->id.bustype = BUS_HOST;
6290 tpacpi_inputdev->id.vendor = (thinkpad_id.vendor) ?
6291 thinkpad_id.vendor :
6292 PCI_VENDOR_ID_IBM;
6293 tpacpi_inputdev->id.product = TPACPI_HKEY_INPUT_PRODUCT;
6294 tpacpi_inputdev->id.version = TPACPI_HKEY_INPUT_VERSION;
6295 }
6296 for (i = 0; i < ARRAY_SIZE(ibms_init); i++) {
6297 ret = ibm_init(&ibms_init[i]);
6298 if (ret >= 0 && *ibms_init[i].param)
6299 ret = ibms_init[i].data->write(ibms_init[i].param);
6300 if (ret < 0) {
6301 thinkpad_acpi_module_exit();
6302 return ret;
6303 }
6304 }
6305 ret = input_register_device(tpacpi_inputdev);
6306 if (ret < 0) {
6307 printk(TPACPI_ERR "unable to register input device\n");
6308 thinkpad_acpi_module_exit();
6309 return ret;
6310 } else {
6311 tp_features.input_device_registered = 1;
6312 }
6313
6314 tpacpi_lifecycle = TPACPI_LIFE_RUNNING;
6315 return 0;
6316 }
6317
6318 /* Please remove this in year 2009 */
6319 MODULE_ALIAS("ibm_acpi");
6320
6321 MODULE_ALIAS(TPACPI_DRVR_SHORTNAME);
6322
6323 /*
6324 * DMI matching for module autoloading
6325 *
6326 * See http://thinkwiki.org/wiki/List_of_DMI_IDs
6327 * See http://thinkwiki.org/wiki/BIOS_Upgrade_Downloads
6328 *
6329 * Only models listed in thinkwiki will be supported, so add yours
6330 * if it is not there yet.
6331 */
6332 #define IBM_BIOS_MODULE_ALIAS(__type) \
6333 MODULE_ALIAS("dmi:bvnIBM:bvr" __type "ET??WW")
6334
6335 /* Non-ancient thinkpads */
6336 MODULE_ALIAS("dmi:bvnIBM:*:svnIBM:*:pvrThinkPad*:rvnIBM:*");
6337 MODULE_ALIAS("dmi:bvnLENOVO:*:svnLENOVO:*:pvrThinkPad*:rvnLENOVO:*");
6338
6339 /* Ancient thinkpad BIOSes have to be identified by
6340 * BIOS type or model number, and there are far less
6341 * BIOS types than model numbers... */
6342 IBM_BIOS_MODULE_ALIAS("I[B,D,H,I,M,N,O,T,W,V,Y,Z]");
6343 IBM_BIOS_MODULE_ALIAS("1[0,3,6,8,A-G,I,K,M-P,S,T]");
6344 IBM_BIOS_MODULE_ALIAS("K[U,X-Z]");
6345
6346 MODULE_AUTHOR("Borislav Deianov, Henrique de Moraes Holschuh");
6347 MODULE_DESCRIPTION(TPACPI_DESC);
6348 MODULE_VERSION(TPACPI_VERSION);
6349 MODULE_LICENSE("GPL");
6350
6351 module_init(thinkpad_acpi_module_init);
6352 module_exit(thinkpad_acpi_module_exit);
Linux 2.6 ibm-acpi/thinkpad-acpi driver git tree