13ef8c37471d0a6575fed59d6cf92dece74c34ba
[pandora-kernel.git] / drivers / platform / x86 / toshiba_acpi.c
1 /*
2  *  toshiba_acpi.c - Toshiba Laptop ACPI Extras
3  *
4  *
5  *  Copyright (C) 2002-2004 John Belmonte
6  *  Copyright (C) 2008 Philip Langdale
7  *  Copyright (C) 2010 Pierre Ducroquet
8  *
9  *  This program is free software; you can redistribute it and/or modify
10  *  it under the terms of the GNU General Public License as published by
11  *  the Free Software Foundation; either version 2 of the License, or
12  *  (at your option) any later version.
13  *
14  *  This program is distributed in the hope that it will be useful,
15  *  but WITHOUT ANY WARRANTY; without even the implied warranty of
16  *  MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
17  *  GNU General Public License for more details.
18  *
19  *  You should have received a copy of the GNU General Public License
20  *  along with this program; if not, write to the Free Software
21  *  Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA  02111-1307  USA
22  *
23  *
24  *  The devolpment page for this driver is located at
25  *  http://memebeam.org/toys/ToshibaAcpiDriver.
26  *
27  *  Credits:
28  *      Jonathan A. Buzzard - Toshiba HCI info, and critical tips on reverse
29  *              engineering the Windows drivers
30  *      Yasushi Nagato - changes for linux kernel 2.4 -> 2.5
31  *      Rob Miller - TV out and hotkeys help
32  *
33  *
34  *  TODO
35  *
36  */
37
38 #define pr_fmt(fmt) KBUILD_MODNAME ": " fmt
39
40 #define TOSHIBA_ACPI_VERSION    "0.19"
41 #define PROC_INTERFACE_VERSION  1
42
43 #include <linux/kernel.h>
44 #include <linux/module.h>
45 #include <linux/init.h>
46 #include <linux/types.h>
47 #include <linux/proc_fs.h>
48 #include <linux/seq_file.h>
49 #include <linux/backlight.h>
50 #include <linux/rfkill.h>
51 #include <linux/input.h>
52 #include <linux/input/sparse-keymap.h>
53 #include <linux/leds.h>
54 #include <linux/slab.h>
55
56 #include <asm/uaccess.h>
57
58 #include <acpi/acpi_drivers.h>
59
60 MODULE_AUTHOR("John Belmonte");
61 MODULE_DESCRIPTION("Toshiba Laptop ACPI Extras Driver");
62 MODULE_LICENSE("GPL");
63
64 /* Toshiba ACPI method paths */
65 #define METHOD_VIDEO_OUT        "\\_SB_.VALX.DSSX"
66
67 /* Toshiba HCI interface definitions
68  *
69  * HCI is Toshiba's "Hardware Control Interface" which is supposed to
70  * be uniform across all their models.  Ideally we would just call
71  * dedicated ACPI methods instead of using this primitive interface.
72  * However the ACPI methods seem to be incomplete in some areas (for
73  * example they allow setting, but not reading, the LCD brightness value),
74  * so this is still useful.
75  */
76
77 #define HCI_WORDS                       6
78
79 /* operations */
80 #define HCI_SET                         0xff00
81 #define HCI_GET                         0xfe00
82
83 /* return codes */
84 #define HCI_SUCCESS                     0x0000
85 #define HCI_FAILURE                     0x1000
86 #define HCI_NOT_SUPPORTED               0x8000
87 #define HCI_EMPTY                       0x8c00
88
89 /* registers */
90 #define HCI_FAN                         0x0004
91 #define HCI_SYSTEM_EVENT                0x0016
92 #define HCI_VIDEO_OUT                   0x001c
93 #define HCI_HOTKEY_EVENT                0x001e
94 #define HCI_LCD_BRIGHTNESS              0x002a
95 #define HCI_WIRELESS                    0x0056
96
97 /* field definitions */
98 #define HCI_LCD_BRIGHTNESS_BITS         3
99 #define HCI_LCD_BRIGHTNESS_SHIFT        (16-HCI_LCD_BRIGHTNESS_BITS)
100 #define HCI_LCD_BRIGHTNESS_LEVELS       (1 << HCI_LCD_BRIGHTNESS_BITS)
101 #define HCI_VIDEO_OUT_LCD               0x1
102 #define HCI_VIDEO_OUT_CRT               0x2
103 #define HCI_VIDEO_OUT_TV                0x4
104 #define HCI_WIRELESS_KILL_SWITCH        0x01
105 #define HCI_WIRELESS_BT_PRESENT         0x0f
106 #define HCI_WIRELESS_BT_ATTACH          0x40
107 #define HCI_WIRELESS_BT_POWER           0x80
108
109 struct toshiba_acpi_dev {
110         struct acpi_device *acpi_dev;
111         const char *method_hci;
112         struct rfkill *bt_rfk;
113         struct input_dev *hotkey_dev;
114         struct backlight_device *backlight_dev;
115         struct led_classdev led_dev;
116
117         int force_fan;
118         int last_key_event;
119         int key_event_valid;
120
121         int illumination_supported:1;
122         int video_supported:1;
123         int fan_supported:1;
124
125         struct mutex mutex;
126 };
127
128 static const struct acpi_device_id toshiba_device_ids[] = {
129         {"TOS6200", 0},
130         {"TOS6208", 0},
131         {"TOS1900", 0},
132         {"", 0},
133 };
134 MODULE_DEVICE_TABLE(acpi, toshiba_device_ids);
135
136 static const struct key_entry toshiba_acpi_keymap[] __devinitconst = {
137         { KE_KEY, 0x101, { KEY_MUTE } },
138         { KE_KEY, 0x102, { KEY_ZOOMOUT } },
139         { KE_KEY, 0x103, { KEY_ZOOMIN } },
140         { KE_KEY, 0x13b, { KEY_COFFEE } },
141         { KE_KEY, 0x13c, { KEY_BATTERY } },
142         { KE_KEY, 0x13d, { KEY_SLEEP } },
143         { KE_KEY, 0x13e, { KEY_SUSPEND } },
144         { KE_KEY, 0x13f, { KEY_SWITCHVIDEOMODE } },
145         { KE_KEY, 0x140, { KEY_BRIGHTNESSDOWN } },
146         { KE_KEY, 0x141, { KEY_BRIGHTNESSUP } },
147         { KE_KEY, 0x142, { KEY_WLAN } },
148         { KE_KEY, 0x143, { KEY_PROG1 } },
149         { KE_KEY, 0x17f, { KEY_FN } },
150         { KE_KEY, 0xb05, { KEY_PROG2 } },
151         { KE_KEY, 0xb06, { KEY_WWW } },
152         { KE_KEY, 0xb07, { KEY_MAIL } },
153         { KE_KEY, 0xb30, { KEY_STOP } },
154         { KE_KEY, 0xb31, { KEY_PREVIOUSSONG } },
155         { KE_KEY, 0xb32, { KEY_NEXTSONG } },
156         { KE_KEY, 0xb33, { KEY_PLAYPAUSE } },
157         { KE_KEY, 0xb5a, { KEY_MEDIA } },
158         { KE_END, 0 },
159 };
160
161 /* utility
162  */
163
164 static __inline__ void _set_bit(u32 * word, u32 mask, int value)
165 {
166         *word = (*word & ~mask) | (mask * value);
167 }
168
169 /* acpi interface wrappers
170  */
171
172 static int write_acpi_int(const char *methodName, int val)
173 {
174         struct acpi_object_list params;
175         union acpi_object in_objs[1];
176         acpi_status status;
177
178         params.count = ARRAY_SIZE(in_objs);
179         params.pointer = in_objs;
180         in_objs[0].type = ACPI_TYPE_INTEGER;
181         in_objs[0].integer.value = val;
182
183         status = acpi_evaluate_object(NULL, (char *)methodName, &params, NULL);
184         return (status == AE_OK) ? 0 : -EIO;
185 }
186
187 /* Perform a raw HCI call.  Here we don't care about input or output buffer
188  * format.
189  */
190 static acpi_status hci_raw(struct toshiba_acpi_dev *dev,
191                            const u32 in[HCI_WORDS], u32 out[HCI_WORDS])
192 {
193         struct acpi_object_list params;
194         union acpi_object in_objs[HCI_WORDS];
195         struct acpi_buffer results;
196         union acpi_object out_objs[HCI_WORDS + 1];
197         acpi_status status;
198         int i;
199
200         params.count = HCI_WORDS;
201         params.pointer = in_objs;
202         for (i = 0; i < HCI_WORDS; ++i) {
203                 in_objs[i].type = ACPI_TYPE_INTEGER;
204                 in_objs[i].integer.value = in[i];
205         }
206
207         results.length = sizeof(out_objs);
208         results.pointer = out_objs;
209
210         status = acpi_evaluate_object(dev->acpi_dev->handle,
211                                       (char *)dev->method_hci, &params,
212                                       &results);
213         if ((status == AE_OK) && (out_objs->package.count <= HCI_WORDS)) {
214                 for (i = 0; i < out_objs->package.count; ++i) {
215                         out[i] = out_objs->package.elements[i].integer.value;
216                 }
217         }
218
219         return status;
220 }
221
222 /* common hci tasks (get or set one or two value)
223  *
224  * In addition to the ACPI status, the HCI system returns a result which
225  * may be useful (such as "not supported").
226  */
227
228 static acpi_status hci_write1(struct toshiba_acpi_dev *dev, u32 reg,
229                               u32 in1, u32 *result)
230 {
231         u32 in[HCI_WORDS] = { HCI_SET, reg, in1, 0, 0, 0 };
232         u32 out[HCI_WORDS];
233         acpi_status status = hci_raw(dev, in, out);
234         *result = (status == AE_OK) ? out[0] : HCI_FAILURE;
235         return status;
236 }
237
238 static acpi_status hci_read1(struct toshiba_acpi_dev *dev, u32 reg,
239                              u32 *out1, u32 *result)
240 {
241         u32 in[HCI_WORDS] = { HCI_GET, reg, 0, 0, 0, 0 };
242         u32 out[HCI_WORDS];
243         acpi_status status = hci_raw(dev, in, out);
244         *out1 = out[2];
245         *result = (status == AE_OK) ? out[0] : HCI_FAILURE;
246         return status;
247 }
248
249 static acpi_status hci_write2(struct toshiba_acpi_dev *dev, u32 reg,
250                               u32 in1, u32 in2, u32 *result)
251 {
252         u32 in[HCI_WORDS] = { HCI_SET, reg, in1, in2, 0, 0 };
253         u32 out[HCI_WORDS];
254         acpi_status status = hci_raw(dev, in, out);
255         *result = (status == AE_OK) ? out[0] : HCI_FAILURE;
256         return status;
257 }
258
259 static acpi_status hci_read2(struct toshiba_acpi_dev *dev, u32 reg,
260                              u32 *out1, u32 *out2, u32 *result)
261 {
262         u32 in[HCI_WORDS] = { HCI_GET, reg, *out1, *out2, 0, 0 };
263         u32 out[HCI_WORDS];
264         acpi_status status = hci_raw(dev, in, out);
265         *out1 = out[2];
266         *out2 = out[3];
267         *result = (status == AE_OK) ? out[0] : HCI_FAILURE;
268         return status;
269 }
270
271 /* Illumination support */
272 static int toshiba_illumination_available(struct toshiba_acpi_dev *dev)
273 {
274         u32 in[HCI_WORDS] = { 0, 0, 0, 0, 0, 0 };
275         u32 out[HCI_WORDS];
276         acpi_status status;
277
278         in[0] = 0xf100;
279         status = hci_raw(dev, in, out);
280         if (ACPI_FAILURE(status)) {
281                 pr_info("Illumination device not available\n");
282                 return 0;
283         }
284         in[0] = 0xf400;
285         status = hci_raw(dev, in, out);
286         return 1;
287 }
288
289 static void toshiba_illumination_set(struct led_classdev *cdev,
290                                      enum led_brightness brightness)
291 {
292         struct toshiba_acpi_dev *dev = container_of(cdev,
293                         struct toshiba_acpi_dev, led_dev);
294         u32 in[HCI_WORDS] = { 0, 0, 0, 0, 0, 0 };
295         u32 out[HCI_WORDS];
296         acpi_status status;
297
298         /* First request : initialize communication. */
299         in[0] = 0xf100;
300         status = hci_raw(dev, in, out);
301         if (ACPI_FAILURE(status)) {
302                 pr_info("Illumination device not available\n");
303                 return;
304         }
305
306         if (brightness) {
307                 /* Switch the illumination on */
308                 in[0] = 0xf400;
309                 in[1] = 0x14e;
310                 in[2] = 1;
311                 status = hci_raw(dev, in, out);
312                 if (ACPI_FAILURE(status)) {
313                         pr_info("ACPI call for illumination failed\n");
314                         return;
315                 }
316         } else {
317                 /* Switch the illumination off */
318                 in[0] = 0xf400;
319                 in[1] = 0x14e;
320                 in[2] = 0;
321                 status = hci_raw(dev, in, out);
322                 if (ACPI_FAILURE(status)) {
323                         pr_info("ACPI call for illumination failed.\n");
324                         return;
325                 }
326         }
327
328         /* Last request : close communication. */
329         in[0] = 0xf200;
330         in[1] = 0;
331         in[2] = 0;
332         hci_raw(dev, in, out);
333 }
334
335 static enum led_brightness toshiba_illumination_get(struct led_classdev *cdev)
336 {
337         struct toshiba_acpi_dev *dev = container_of(cdev,
338                         struct toshiba_acpi_dev, led_dev);
339         u32 in[HCI_WORDS] = { 0, 0, 0, 0, 0, 0 };
340         u32 out[HCI_WORDS];
341         acpi_status status;
342         enum led_brightness result;
343
344         /*¬†First request : initialize communication. */
345         in[0] = 0xf100;
346         status = hci_raw(dev, in, out);
347         if (ACPI_FAILURE(status)) {
348                 pr_info("Illumination device not available\n");
349                 return LED_OFF;
350         }
351
352         /* Check the illumination */
353         in[0] = 0xf300;
354         in[1] = 0x14e;
355         status = hci_raw(dev, in, out);
356         if (ACPI_FAILURE(status)) {
357                 pr_info("ACPI call for illumination failed.\n");
358                 return LED_OFF;
359         }
360
361         result = out[2] ? LED_FULL : LED_OFF;
362
363         /* Last request : close communication. */
364         in[0] = 0xf200;
365         in[1] = 0;
366         in[2] = 0;
367         hci_raw(dev, in, out);
368
369         return result;
370 }
371
372 /* Bluetooth rfkill handlers */
373
374 static u32 hci_get_bt_present(struct toshiba_acpi_dev *dev, bool *present)
375 {
376         u32 hci_result;
377         u32 value, value2;
378
379         value = 0;
380         value2 = 0;
381         hci_read2(dev, HCI_WIRELESS, &value, &value2, &hci_result);
382         if (hci_result == HCI_SUCCESS)
383                 *present = (value & HCI_WIRELESS_BT_PRESENT) ? true : false;
384
385         return hci_result;
386 }
387
388 static u32 hci_get_radio_state(struct toshiba_acpi_dev *dev, bool *radio_state)
389 {
390         u32 hci_result;
391         u32 value, value2;
392
393         value = 0;
394         value2 = 0x0001;
395         hci_read2(dev, HCI_WIRELESS, &value, &value2, &hci_result);
396
397         *radio_state = value & HCI_WIRELESS_KILL_SWITCH;
398         return hci_result;
399 }
400
401 static int bt_rfkill_set_block(void *data, bool blocked)
402 {
403         struct toshiba_acpi_dev *dev = data;
404         u32 result1, result2;
405         u32 value;
406         int err;
407         bool radio_state;
408
409         value = (blocked == false);
410
411         mutex_lock(&dev->mutex);
412         if (hci_get_radio_state(dev, &radio_state) != HCI_SUCCESS) {
413                 err = -EIO;
414                 goto out;
415         }
416
417         if (!radio_state) {
418                 err = 0;
419                 goto out;
420         }
421
422         hci_write2(dev, HCI_WIRELESS, value, HCI_WIRELESS_BT_POWER, &result1);
423         hci_write2(dev, HCI_WIRELESS, value, HCI_WIRELESS_BT_ATTACH, &result2);
424
425         if (result1 != HCI_SUCCESS || result2 != HCI_SUCCESS)
426                 err = -EIO;
427         else
428                 err = 0;
429  out:
430         mutex_unlock(&dev->mutex);
431         return err;
432 }
433
434 static void bt_rfkill_poll(struct rfkill *rfkill, void *data)
435 {
436         bool new_rfk_state;
437         bool value;
438         u32 hci_result;
439         struct toshiba_acpi_dev *dev = data;
440
441         mutex_lock(&dev->mutex);
442
443         hci_result = hci_get_radio_state(dev, &value);
444         if (hci_result != HCI_SUCCESS) {
445                 /* Can't do anything useful */
446                 mutex_unlock(&dev->mutex);
447                 return;
448         }
449
450         new_rfk_state = value;
451
452         mutex_unlock(&dev->mutex);
453
454         if (rfkill_set_hw_state(rfkill, !new_rfk_state))
455                 bt_rfkill_set_block(data, true);
456 }
457
458 static const struct rfkill_ops toshiba_rfk_ops = {
459         .set_block = bt_rfkill_set_block,
460         .poll = bt_rfkill_poll,
461 };
462
463 static struct proc_dir_entry *toshiba_proc_dir /*= 0*/ ;
464
465 static int get_lcd(struct backlight_device *bd)
466 {
467         struct toshiba_acpi_dev *dev = bl_get_data(bd);
468         u32 hci_result;
469         u32 value;
470
471         hci_read1(dev, HCI_LCD_BRIGHTNESS, &value, &hci_result);
472         if (hci_result == HCI_SUCCESS)
473                 return (value >> HCI_LCD_BRIGHTNESS_SHIFT);
474
475         return -EIO;
476 }
477
478 static int lcd_proc_show(struct seq_file *m, void *v)
479 {
480         struct toshiba_acpi_dev *dev = m->private;
481         int value;
482
483         if (!dev->backlight_dev)
484                 return -ENODEV;
485
486         value = get_lcd(dev->backlight_dev);
487         if (value >= 0) {
488                 seq_printf(m, "brightness:              %d\n", value);
489                 seq_printf(m, "brightness_levels:       %d\n",
490                              HCI_LCD_BRIGHTNESS_LEVELS);
491                 return 0;
492         }
493
494         pr_err("Error reading LCD brightness\n");
495         return -EIO;
496 }
497
498 static int lcd_proc_open(struct inode *inode, struct file *file)
499 {
500         return single_open(file, lcd_proc_show, PDE(inode)->data);
501 }
502
503 static int set_lcd(struct toshiba_acpi_dev *dev, int value)
504 {
505         u32 hci_result;
506
507         value = value << HCI_LCD_BRIGHTNESS_SHIFT;
508         hci_write1(dev, HCI_LCD_BRIGHTNESS, value, &hci_result);
509         return hci_result == HCI_SUCCESS ? 0 : -EIO;
510 }
511
512 static int set_lcd_status(struct backlight_device *bd)
513 {
514         struct toshiba_acpi_dev *dev = bl_get_data(bd);
515         return set_lcd(dev, bd->props.brightness);
516 }
517
518 static ssize_t lcd_proc_write(struct file *file, const char __user *buf,
519                               size_t count, loff_t *pos)
520 {
521         struct toshiba_acpi_dev *dev = PDE(file->f_path.dentry->d_inode)->data;
522         char cmd[42];
523         size_t len;
524         int value;
525         int ret;
526
527         len = min(count, sizeof(cmd) - 1);
528         if (copy_from_user(cmd, buf, len))
529                 return -EFAULT;
530         cmd[len] = '\0';
531
532         if (sscanf(cmd, " brightness : %i", &value) == 1 &&
533             value >= 0 && value < HCI_LCD_BRIGHTNESS_LEVELS) {
534                 ret = set_lcd(dev, value);
535                 if (ret == 0)
536                         ret = count;
537         } else {
538                 ret = -EINVAL;
539         }
540         return ret;
541 }
542
543 static const struct file_operations lcd_proc_fops = {
544         .owner          = THIS_MODULE,
545         .open           = lcd_proc_open,
546         .read           = seq_read,
547         .llseek         = seq_lseek,
548         .release        = single_release,
549         .write          = lcd_proc_write,
550 };
551
552 static int get_video_status(struct toshiba_acpi_dev *dev, u32 *status)
553 {
554         u32 hci_result;
555
556         hci_read1(dev, HCI_VIDEO_OUT, status, &hci_result);
557         return hci_result == HCI_SUCCESS ? 0 : -EIO;
558 }
559
560 static int video_proc_show(struct seq_file *m, void *v)
561 {
562         struct toshiba_acpi_dev *dev = m->private;
563         u32 value;
564         int ret;
565
566         ret = get_video_status(dev, &value);
567         if (!ret) {
568                 int is_lcd = (value & HCI_VIDEO_OUT_LCD) ? 1 : 0;
569                 int is_crt = (value & HCI_VIDEO_OUT_CRT) ? 1 : 0;
570                 int is_tv = (value & HCI_VIDEO_OUT_TV) ? 1 : 0;
571                 seq_printf(m, "lcd_out:                 %d\n", is_lcd);
572                 seq_printf(m, "crt_out:                 %d\n", is_crt);
573                 seq_printf(m, "tv_out:                  %d\n", is_tv);
574         }
575
576         return ret;
577 }
578
579 static int video_proc_open(struct inode *inode, struct file *file)
580 {
581         return single_open(file, video_proc_show, PDE(inode)->data);
582 }
583
584 static ssize_t video_proc_write(struct file *file, const char __user *buf,
585                                 size_t count, loff_t *pos)
586 {
587         struct toshiba_acpi_dev *dev = PDE(file->f_path.dentry->d_inode)->data;
588         char *cmd, *buffer;
589         int ret;
590         int value;
591         int remain = count;
592         int lcd_out = -1;
593         int crt_out = -1;
594         int tv_out = -1;
595         u32 video_out;
596
597         cmd = kmalloc(count + 1, GFP_KERNEL);
598         if (!cmd)
599                 return -ENOMEM;
600         if (copy_from_user(cmd, buf, count)) {
601                 kfree(cmd);
602                 return -EFAULT;
603         }
604         cmd[count] = '\0';
605
606         buffer = cmd;
607
608         /* scan expression.  Multiple expressions may be delimited with ;
609          *
610          *  NOTE: to keep scanning simple, invalid fields are ignored
611          */
612         while (remain) {
613                 if (sscanf(buffer, " lcd_out : %i", &value) == 1)
614                         lcd_out = value & 1;
615                 else if (sscanf(buffer, " crt_out : %i", &value) == 1)
616                         crt_out = value & 1;
617                 else if (sscanf(buffer, " tv_out : %i", &value) == 1)
618                         tv_out = value & 1;
619                 /* advance to one character past the next ; */
620                 do {
621                         ++buffer;
622                         --remain;
623                 }
624                 while (remain && *(buffer - 1) != ';');
625         }
626
627         kfree(cmd);
628
629         ret = get_video_status(dev, &video_out);
630         if (!ret) {
631                 unsigned int new_video_out = video_out;
632                 if (lcd_out != -1)
633                         _set_bit(&new_video_out, HCI_VIDEO_OUT_LCD, lcd_out);
634                 if (crt_out != -1)
635                         _set_bit(&new_video_out, HCI_VIDEO_OUT_CRT, crt_out);
636                 if (tv_out != -1)
637                         _set_bit(&new_video_out, HCI_VIDEO_OUT_TV, tv_out);
638                 /* To avoid unnecessary video disruption, only write the new
639                  * video setting if something changed. */
640                 if (new_video_out != video_out)
641                         ret = write_acpi_int(METHOD_VIDEO_OUT, new_video_out);
642         }
643
644         return ret ? ret : count;
645 }
646
647 static const struct file_operations video_proc_fops = {
648         .owner          = THIS_MODULE,
649         .open           = video_proc_open,
650         .read           = seq_read,
651         .llseek         = seq_lseek,
652         .release        = single_release,
653         .write          = video_proc_write,
654 };
655
656 static int get_fan_status(struct toshiba_acpi_dev *dev, u32 *status)
657 {
658         u32 hci_result;
659
660         hci_read1(dev, HCI_FAN, status, &hci_result);
661         return hci_result == HCI_SUCCESS ? 0 : -EIO;
662 }
663
664 static int fan_proc_show(struct seq_file *m, void *v)
665 {
666         struct toshiba_acpi_dev *dev = m->private;
667         int ret;
668         u32 value;
669
670         ret = get_fan_status(dev, &value);
671         if (!ret) {
672                 seq_printf(m, "running:                 %d\n", (value > 0));
673                 seq_printf(m, "force_on:                %d\n", dev->force_fan);
674         }
675
676         return ret;
677 }
678
679 static int fan_proc_open(struct inode *inode, struct file *file)
680 {
681         return single_open(file, fan_proc_show, PDE(inode)->data);
682 }
683
684 static ssize_t fan_proc_write(struct file *file, const char __user *buf,
685                               size_t count, loff_t *pos)
686 {
687         struct toshiba_acpi_dev *dev = PDE(file->f_path.dentry->d_inode)->data;
688         char cmd[42];
689         size_t len;
690         int value;
691         u32 hci_result;
692
693         len = min(count, sizeof(cmd) - 1);
694         if (copy_from_user(cmd, buf, len))
695                 return -EFAULT;
696         cmd[len] = '\0';
697
698         if (sscanf(cmd, " force_on : %i", &value) == 1 &&
699             value >= 0 && value <= 1) {
700                 hci_write1(dev, HCI_FAN, value, &hci_result);
701                 if (hci_result != HCI_SUCCESS)
702                         return -EIO;
703                 else
704                         dev->force_fan = value;
705         } else {
706                 return -EINVAL;
707         }
708
709         return count;
710 }
711
712 static const struct file_operations fan_proc_fops = {
713         .owner          = THIS_MODULE,
714         .open           = fan_proc_open,
715         .read           = seq_read,
716         .llseek         = seq_lseek,
717         .release        = single_release,
718         .write          = fan_proc_write,
719 };
720
721 static int keys_proc_show(struct seq_file *m, void *v)
722 {
723         struct toshiba_acpi_dev *dev = m->private;
724         u32 hci_result;
725         u32 value;
726
727         if (!dev->key_event_valid) {
728                 hci_read1(dev, HCI_SYSTEM_EVENT, &value, &hci_result);
729                 if (hci_result == HCI_SUCCESS) {
730                         dev->key_event_valid = 1;
731                         dev->last_key_event = value;
732                 } else if (hci_result == HCI_EMPTY) {
733                         /* better luck next time */
734                 } else if (hci_result == HCI_NOT_SUPPORTED) {
735                         /* This is a workaround for an unresolved issue on
736                          * some machines where system events sporadically
737                          * become disabled. */
738                         hci_write1(dev, HCI_SYSTEM_EVENT, 1, &hci_result);
739                         pr_notice("Re-enabled hotkeys\n");
740                 } else {
741                         pr_err("Error reading hotkey status\n");
742                         return -EIO;
743                 }
744         }
745
746         seq_printf(m, "hotkey_ready:            %d\n", dev->key_event_valid);
747         seq_printf(m, "hotkey:                  0x%04x\n", dev->last_key_event);
748         return 0;
749 }
750
751 static int keys_proc_open(struct inode *inode, struct file *file)
752 {
753         return single_open(file, keys_proc_show, PDE(inode)->data);
754 }
755
756 static ssize_t keys_proc_write(struct file *file, const char __user *buf,
757                                size_t count, loff_t *pos)
758 {
759         struct toshiba_acpi_dev *dev = PDE(file->f_path.dentry->d_inode)->data;
760         char cmd[42];
761         size_t len;
762         int value;
763
764         len = min(count, sizeof(cmd) - 1);
765         if (copy_from_user(cmd, buf, len))
766                 return -EFAULT;
767         cmd[len] = '\0';
768
769         if (sscanf(cmd, " hotkey_ready : %i", &value) == 1 && value == 0) {
770                 dev->key_event_valid = 0;
771         } else {
772                 return -EINVAL;
773         }
774
775         return count;
776 }
777
778 static const struct file_operations keys_proc_fops = {
779         .owner          = THIS_MODULE,
780         .open           = keys_proc_open,
781         .read           = seq_read,
782         .llseek         = seq_lseek,
783         .release        = single_release,
784         .write          = keys_proc_write,
785 };
786
787 static int version_proc_show(struct seq_file *m, void *v)
788 {
789         seq_printf(m, "driver:                  %s\n", TOSHIBA_ACPI_VERSION);
790         seq_printf(m, "proc_interface:          %d\n", PROC_INTERFACE_VERSION);
791         return 0;
792 }
793
794 static int version_proc_open(struct inode *inode, struct file *file)
795 {
796         return single_open(file, version_proc_show, PDE(inode)->data);
797 }
798
799 static const struct file_operations version_proc_fops = {
800         .owner          = THIS_MODULE,
801         .open           = version_proc_open,
802         .read           = seq_read,
803         .llseek         = seq_lseek,
804         .release        = single_release,
805 };
806
807 /* proc and module init
808  */
809
810 #define PROC_TOSHIBA            "toshiba"
811
812 static void __devinit
813 create_toshiba_proc_entries(struct toshiba_acpi_dev *dev)
814 {
815         if (dev->backlight_dev)
816                 proc_create_data("lcd", S_IRUGO | S_IWUSR, toshiba_proc_dir,
817                                  &lcd_proc_fops, dev);
818         if (dev->video_supported)
819                 proc_create_data("video", S_IRUGO | S_IWUSR, toshiba_proc_dir,
820                                  &video_proc_fops, dev);
821         if (dev->fan_supported)
822                 proc_create_data("fan", S_IRUGO | S_IWUSR, toshiba_proc_dir,
823                                  &fan_proc_fops, dev);
824         if (dev->hotkey_dev)
825                 proc_create_data("keys", S_IRUGO | S_IWUSR, toshiba_proc_dir,
826                                  &keys_proc_fops, dev);
827         proc_create_data("version", S_IRUGO, toshiba_proc_dir,
828                          &version_proc_fops, dev);
829 }
830
831 static void remove_toshiba_proc_entries(struct toshiba_acpi_dev *dev)
832 {
833         if (dev->backlight_dev)
834                 remove_proc_entry("lcd", toshiba_proc_dir);
835         if (dev->video_supported)
836                 remove_proc_entry("video", toshiba_proc_dir);
837         if (dev->fan_supported)
838                 remove_proc_entry("fan", toshiba_proc_dir);
839         if (dev->hotkey_dev)
840                 remove_proc_entry("keys", toshiba_proc_dir);
841         remove_proc_entry("version", toshiba_proc_dir);
842 }
843
844 static const struct backlight_ops toshiba_backlight_data = {
845         .get_brightness = get_lcd,
846         .update_status  = set_lcd_status,
847 };
848
849 static int __devinit toshiba_acpi_setup_keyboard(struct toshiba_acpi_dev *dev)
850 {
851         acpi_status status;
852         int error;
853
854         dev->hotkey_dev = input_allocate_device();
855         if (!dev->hotkey_dev) {
856                 pr_info("Unable to register input device\n");
857                 return -ENOMEM;
858         }
859
860         dev->hotkey_dev->name = "Toshiba input device";
861         dev->hotkey_dev->phys = "toshiba_acpi/input0";
862         dev->hotkey_dev->id.bustype = BUS_HOST;
863
864         error = sparse_keymap_setup(dev->hotkey_dev, toshiba_acpi_keymap, NULL);
865         if (error)
866                 goto err_free_dev;
867
868         status = acpi_evaluate_object(dev->acpi_dev->handle, "ENAB", NULL, NULL);
869         if (ACPI_FAILURE(status)) {
870                 pr_info("Unable to enable hotkeys\n");
871                 error = -ENODEV;
872                 goto err_free_keymap;
873         }
874
875         error = input_register_device(dev->hotkey_dev);
876         if (error) {
877                 pr_info("Unable to register input device\n");
878                 goto err_free_keymap;
879         }
880
881         return 0;
882
883  err_free_keymap:
884         sparse_keymap_free(dev->hotkey_dev);
885  err_free_dev:
886         input_free_device(dev->hotkey_dev);
887         dev->hotkey_dev = NULL;
888         return error;
889 }
890
891 static int toshiba_acpi_remove(struct acpi_device *acpi_dev, int type)
892 {
893         struct toshiba_acpi_dev *dev = acpi_driver_data(acpi_dev);
894
895         remove_toshiba_proc_entries(dev);
896
897         if (dev->hotkey_dev) {
898                 input_unregister_device(dev->hotkey_dev);
899                 sparse_keymap_free(dev->hotkey_dev);
900         }
901
902         if (dev->bt_rfk) {
903                 rfkill_unregister(dev->bt_rfk);
904                 rfkill_destroy(dev->bt_rfk);
905         }
906
907         if (dev->backlight_dev)
908                 backlight_device_unregister(dev->backlight_dev);
909
910         if (dev->illumination_supported)
911                 led_classdev_unregister(&dev->led_dev);
912
913         kfree(dev);
914
915         return 0;
916 }
917
918 static const char * __devinit find_hci_method(acpi_handle handle)
919 {
920         acpi_status status;
921         acpi_handle hci_handle;
922
923         status = acpi_get_handle(handle, "GHCI", &hci_handle);
924         if (ACPI_SUCCESS(status))
925                 return "GHCI";
926
927         status = acpi_get_handle(handle, "SPFC", &hci_handle);
928         if (ACPI_SUCCESS(status))
929                 return "SPFC";
930
931         return NULL;
932 }
933
934 static int __devinit toshiba_acpi_add(struct acpi_device *acpi_dev)
935 {
936         struct toshiba_acpi_dev *dev;
937         const char *hci_method;
938         u32 hci_result;
939         u32 dummy;
940         bool bt_present;
941         int ret = 0;
942         struct backlight_properties props;
943
944         pr_info("Toshiba Laptop ACPI Extras version %s\n",
945                TOSHIBA_ACPI_VERSION);
946
947         hci_method = find_hci_method(acpi_dev->handle);
948         if (!hci_method) {
949                 pr_err("HCI interface not found\n");
950                 return -ENODEV;
951         }
952
953         dev = kzalloc(sizeof(*dev), GFP_KERNEL);
954         if (!dev)
955                 return -ENOMEM;
956         dev->acpi_dev = acpi_dev;
957         dev->method_hci = hci_method;
958         acpi_dev->driver_data = dev;
959
960         if (toshiba_acpi_setup_keyboard(dev))
961                 pr_info("Unable to activate hotkeys\n");
962
963         mutex_init(&dev->mutex);
964
965         /* enable event fifo */
966         hci_write1(dev, HCI_SYSTEM_EVENT, 1, &hci_result);
967
968         props.type = BACKLIGHT_PLATFORM;
969         props.max_brightness = HCI_LCD_BRIGHTNESS_LEVELS - 1;
970         dev->backlight_dev = backlight_device_register("toshiba",
971                                                        &acpi_dev->dev,
972                                                        dev,
973                                                        &toshiba_backlight_data,
974                                                        &props);
975         if (IS_ERR(dev->backlight_dev)) {
976                 ret = PTR_ERR(dev->backlight_dev);
977
978                 pr_err("Could not register toshiba backlight device\n");
979                 dev->backlight_dev = NULL;
980                 goto error;
981         }
982         dev->backlight_dev->props.brightness = get_lcd(dev->backlight_dev);
983
984         /* Register rfkill switch for Bluetooth */
985         if (hci_get_bt_present(dev, &bt_present) == HCI_SUCCESS && bt_present) {
986                 dev->bt_rfk = rfkill_alloc("Toshiba Bluetooth",
987                                            &acpi_dev->dev,
988                                            RFKILL_TYPE_BLUETOOTH,
989                                            &toshiba_rfk_ops,
990                                            dev);
991                 if (!dev->bt_rfk) {
992                         pr_err("unable to allocate rfkill device\n");
993                         ret = -ENOMEM;
994                         goto error;
995                 }
996
997                 ret = rfkill_register(dev->bt_rfk);
998                 if (ret) {
999                         pr_err("unable to register rfkill device\n");
1000                         rfkill_destroy(dev->bt_rfk);
1001                         goto error;
1002                 }
1003         }
1004
1005         if (toshiba_illumination_available(dev)) {
1006                 dev->led_dev.name = "toshiba::illumination";
1007                 dev->led_dev.max_brightness = 1;
1008                 dev->led_dev.brightness_set = toshiba_illumination_set;
1009                 dev->led_dev.brightness_get = toshiba_illumination_get;
1010                 if (!led_classdev_register(&acpi_dev->dev, &dev->led_dev))
1011                         dev->illumination_supported = 1;
1012         }
1013
1014         /* Determine whether or not BIOS supports fan and video interfaces */
1015
1016         ret = get_video_status(dev, &dummy);
1017         dev->video_supported = !ret;
1018
1019         ret = get_fan_status(dev, &dummy);
1020         dev->fan_supported = !ret;
1021
1022         create_toshiba_proc_entries(dev);
1023
1024         return 0;
1025
1026 error:
1027         toshiba_acpi_remove(acpi_dev, 0);
1028         return ret;
1029 }
1030
1031 static void toshiba_acpi_notify(struct acpi_device *acpi_dev, u32 event)
1032 {
1033         struct toshiba_acpi_dev *dev = acpi_driver_data(acpi_dev);
1034         u32 hci_result, value;
1035
1036         if (event != 0x80)
1037                 return;
1038         do {
1039                 hci_read1(dev, HCI_SYSTEM_EVENT, &value, &hci_result);
1040                 if (hci_result == HCI_SUCCESS) {
1041                         if (value == 0x100)
1042                                 continue;
1043                         /* act on key press; ignore key release */
1044                         if (value & 0x80)
1045                                 continue;
1046
1047                         if (!sparse_keymap_report_event(dev->hotkey_dev,
1048                                                         value, 1, true)) {
1049                                 pr_info("Unknown key %x\n",
1050                                        value);
1051                         }
1052                 } else if (hci_result == HCI_NOT_SUPPORTED) {
1053                         /* This is a workaround for an unresolved issue on
1054                          * some machines where system events sporadically
1055                          * become disabled. */
1056                         hci_write1(dev, HCI_SYSTEM_EVENT, 1, &hci_result);
1057                         pr_notice("Re-enabled hotkeys\n");
1058                 }
1059         } while (hci_result != HCI_EMPTY);
1060 }
1061
1062
1063 static struct acpi_driver toshiba_acpi_driver = {
1064         .name   = "Toshiba ACPI driver",
1065         .owner  = THIS_MODULE,
1066         .ids    = toshiba_device_ids,
1067         .flags  = ACPI_DRIVER_ALL_NOTIFY_EVENTS,
1068         .ops    = {
1069                 .add            = toshiba_acpi_add,
1070                 .remove         = toshiba_acpi_remove,
1071                 .notify         = toshiba_acpi_notify,
1072         },
1073 };
1074
1075 static int __init toshiba_acpi_init(void)
1076 {
1077         int ret;
1078
1079         toshiba_proc_dir = proc_mkdir(PROC_TOSHIBA, acpi_root_dir);
1080         if (!toshiba_proc_dir) {
1081                 pr_err("Unable to create proc dir " PROC_TOSHIBA "\n");
1082                 return -ENODEV;
1083         }
1084
1085         ret = acpi_bus_register_driver(&toshiba_acpi_driver);
1086         if (ret) {
1087                 pr_err("Failed to register ACPI driver: %d\n", ret);
1088                 remove_proc_entry(PROC_TOSHIBA, acpi_root_dir);
1089         }
1090
1091         return ret;
1092 }
1093
1094 static void __exit toshiba_acpi_exit(void)
1095 {
1096         acpi_bus_unregister_driver(&toshiba_acpi_driver);
1097         if (toshiba_proc_dir)
1098                 remove_proc_entry(PROC_TOSHIBA, acpi_root_dir);
1099 }
1100
1101 module_init(toshiba_acpi_init);
1102 module_exit(toshiba_acpi_exit);