Version:  2.0.40 2.2.26 2.4.37 2.6.39 3.0 3.1 3.2 3.3 3.4 3.5 3.6 3.7 3.8 3.9 3.10 3.11 3.12 3.13 3.14 3.15

Linux/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  *  Copyright (C) 2014 Azael Avalos
  9  *
 10  *  This program is free software; you can redistribute it and/or modify
 11  *  it under the terms of the GNU General Public License as published by
 12  *  the Free Software Foundation; either version 2 of the License, or
 13  *  (at your option) any later version.
 14  *
 15  *  This program is distributed in the hope that it will be useful,
 16  *  but WITHOUT ANY WARRANTY; without even the implied warranty of
 17  *  MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
 18  *  GNU General Public License for more details.
 19  *
 20  *  You should have received a copy of the GNU General Public License
 21  *  along with this program; if not, write to the Free Software
 22  *  Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA  02111-1307  USA
 23  *
 24  *
 25  *  The devolpment page for this driver is located at
 26  *  http://memebeam.org/toys/ToshibaAcpiDriver.
 27  *
 28  *  Credits:
 29  *      Jonathan A. Buzzard - Toshiba HCI info, and critical tips on reverse
 30  *              engineering the Windows drivers
 31  *      Yasushi Nagato - changes for linux kernel 2.4 -> 2.5
 32  *      Rob Miller - TV out and hotkeys help
 33  *
 34  *
 35  *  TODO
 36  *
 37  */
 38 
 39 #define pr_fmt(fmt) KBUILD_MODNAME ": " fmt
 40 
 41 #define TOSHIBA_ACPI_VERSION    "0.20"
 42 #define PROC_INTERFACE_VERSION  1
 43 
 44 #include <linux/kernel.h>
 45 #include <linux/module.h>
 46 #include <linux/init.h>
 47 #include <linux/types.h>
 48 #include <linux/proc_fs.h>
 49 #include <linux/seq_file.h>
 50 #include <linux/backlight.h>
 51 #include <linux/rfkill.h>
 52 #include <linux/input.h>
 53 #include <linux/input/sparse-keymap.h>
 54 #include <linux/leds.h>
 55 #include <linux/slab.h>
 56 #include <linux/workqueue.h>
 57 #include <linux/i8042.h>
 58 #include <linux/acpi.h>
 59 #include <asm/uaccess.h>
 60 
 61 MODULE_AUTHOR("John Belmonte");
 62 MODULE_DESCRIPTION("Toshiba Laptop ACPI Extras Driver");
 63 MODULE_LICENSE("GPL");
 64 
 65 #define TOSHIBA_WMI_EVENT_GUID "59142400-C6A3-40FA-BADB-8A2652834100"
 66 
 67 /* Scan code for Fn key on TOS1900 models */
 68 #define TOS1900_FN_SCAN         0x6e
 69 
 70 /* Toshiba ACPI method paths */
 71 #define METHOD_VIDEO_OUT        "\\_SB_.VALX.DSSX"
 72 
 73 /* Toshiba HCI interface definitions
 74  *
 75  * HCI is Toshiba's "Hardware Control Interface" which is supposed to
 76  * be uniform across all their models.  Ideally we would just call
 77  * dedicated ACPI methods instead of using this primitive interface.
 78  * However the ACPI methods seem to be incomplete in some areas (for
 79  * example they allow setting, but not reading, the LCD brightness value),
 80  * so this is still useful.
 81  *
 82  * SCI stands for "System Configuration Interface" which aim is to
 83  * conceal differences in hardware between different models.
 84  */
 85 
 86 #define HCI_WORDS                       6
 87 
 88 /* operations */
 89 #define HCI_SET                         0xff00
 90 #define HCI_GET                         0xfe00
 91 #define SCI_OPEN                        0xf100
 92 #define SCI_CLOSE                       0xf200
 93 #define SCI_GET                         0xf300
 94 #define SCI_SET                         0xf400
 95 
 96 /* return codes */
 97 #define HCI_SUCCESS                     0x0000
 98 #define HCI_FAILURE                     0x1000
 99 #define HCI_NOT_SUPPORTED               0x8000
100 #define HCI_EMPTY                       0x8c00
101 #define HCI_DATA_NOT_AVAILABLE          0x8d20
102 #define HCI_NOT_INITIALIZED             0x8d50
103 #define SCI_OPEN_CLOSE_OK               0x0044
104 #define SCI_ALREADY_OPEN                0x8100
105 #define SCI_NOT_OPENED                  0x8200
106 #define SCI_INPUT_DATA_ERROR            0x8300
107 #define SCI_NOT_PRESENT                 0x8600
108 
109 /* registers */
110 #define HCI_FAN                         0x0004
111 #define HCI_TR_BACKLIGHT                0x0005
112 #define HCI_SYSTEM_EVENT                0x0016
113 #define HCI_VIDEO_OUT                   0x001c
114 #define HCI_HOTKEY_EVENT                0x001e
115 #define HCI_LCD_BRIGHTNESS              0x002a
116 #define HCI_WIRELESS                    0x0056
117 #define HCI_ACCELEROMETER               0x006d
118 #define HCI_KBD_ILLUMINATION            0x0095
119 #define HCI_ECO_MODE                    0x0097
120 #define HCI_ACCELEROMETER2              0x00a6
121 #define SCI_ILLUMINATION                0x014e
122 #define SCI_KBD_ILLUM_STATUS            0x015c
123 #define SCI_TOUCHPAD                    0x050e
124 
125 /* field definitions */
126 #define HCI_ACCEL_MASK                  0x7fff
127 #define HCI_HOTKEY_DISABLE              0x0b
128 #define HCI_HOTKEY_ENABLE               0x09
129 #define HCI_LCD_BRIGHTNESS_BITS         3
130 #define HCI_LCD_BRIGHTNESS_SHIFT        (16-HCI_LCD_BRIGHTNESS_BITS)
131 #define HCI_LCD_BRIGHTNESS_LEVELS       (1 << HCI_LCD_BRIGHTNESS_BITS)
132 #define HCI_MISC_SHIFT                  0x10
133 #define HCI_VIDEO_OUT_LCD               0x1
134 #define HCI_VIDEO_OUT_CRT               0x2
135 #define HCI_VIDEO_OUT_TV                0x4
136 #define HCI_WIRELESS_KILL_SWITCH        0x01
137 #define HCI_WIRELESS_BT_PRESENT         0x0f
138 #define HCI_WIRELESS_BT_ATTACH          0x40
139 #define HCI_WIRELESS_BT_POWER           0x80
140 #define SCI_KBD_MODE_FNZ                0x1
141 #define SCI_KBD_MODE_AUTO               0x2
142 
143 struct toshiba_acpi_dev {
144         struct acpi_device *acpi_dev;
145         const char *method_hci;
146         struct rfkill *bt_rfk;
147         struct input_dev *hotkey_dev;
148         struct work_struct hotkey_work;
149         struct backlight_device *backlight_dev;
150         struct led_classdev led_dev;
151         struct led_classdev kbd_led;
152         struct led_classdev eco_led;
153 
154         int force_fan;
155         int last_key_event;
156         int key_event_valid;
157         int kbd_mode;
158         int kbd_time;
159 
160         unsigned int illumination_supported:1;
161         unsigned int video_supported:1;
162         unsigned int fan_supported:1;
163         unsigned int system_event_supported:1;
164         unsigned int ntfy_supported:1;
165         unsigned int info_supported:1;
166         unsigned int tr_backlight_supported:1;
167         unsigned int kbd_illum_supported:1;
168         unsigned int kbd_led_registered:1;
169         unsigned int touchpad_supported:1;
170         unsigned int eco_supported:1;
171         unsigned int accelerometer_supported:1;
172         unsigned int sysfs_created:1;
173 
174         struct mutex mutex;
175 };
176 
177 static struct toshiba_acpi_dev *toshiba_acpi;
178 
179 static const struct acpi_device_id toshiba_device_ids[] = {
180         {"TOS6200", 0},
181         {"TOS6208", 0},
182         {"TOS1900", 0},
183         {"", 0},
184 };
185 MODULE_DEVICE_TABLE(acpi, toshiba_device_ids);
186 
187 static const struct key_entry toshiba_acpi_keymap[] = {
188         { KE_KEY, 0x9e, { KEY_RFKILL } },
189         { KE_KEY, 0x101, { KEY_MUTE } },
190         { KE_KEY, 0x102, { KEY_ZOOMOUT } },
191         { KE_KEY, 0x103, { KEY_ZOOMIN } },
192         { KE_KEY, 0x12c, { KEY_KBDILLUMTOGGLE } },
193         { KE_KEY, 0x139, { KEY_ZOOMRESET } },
194         { KE_KEY, 0x13b, { KEY_COFFEE } },
195         { KE_KEY, 0x13c, { KEY_BATTERY } },
196         { KE_KEY, 0x13d, { KEY_SLEEP } },
197         { KE_KEY, 0x13e, { KEY_SUSPEND } },
198         { KE_KEY, 0x13f, { KEY_SWITCHVIDEOMODE } },
199         { KE_KEY, 0x140, { KEY_BRIGHTNESSDOWN } },
200         { KE_KEY, 0x141, { KEY_BRIGHTNESSUP } },
201         { KE_KEY, 0x142, { KEY_WLAN } },
202         { KE_KEY, 0x143, { KEY_TOUCHPAD_TOGGLE } },
203         { KE_KEY, 0x17f, { KEY_FN } },
204         { KE_KEY, 0xb05, { KEY_PROG2 } },
205         { KE_KEY, 0xb06, { KEY_WWW } },
206         { KE_KEY, 0xb07, { KEY_MAIL } },
207         { KE_KEY, 0xb30, { KEY_STOP } },
208         { KE_KEY, 0xb31, { KEY_PREVIOUSSONG } },
209         { KE_KEY, 0xb32, { KEY_NEXTSONG } },
210         { KE_KEY, 0xb33, { KEY_PLAYPAUSE } },
211         { KE_KEY, 0xb5a, { KEY_MEDIA } },
212         { KE_IGNORE, 0x1430, { KEY_RESERVED } },
213         { KE_END, 0 },
214 };
215 
216 /* utility
217  */
218 
219 static __inline__ void _set_bit(u32 * word, u32 mask, int value)
220 {
221         *word = (*word & ~mask) | (mask * value);
222 }
223 
224 /* acpi interface wrappers
225  */
226 
227 static int write_acpi_int(const char *methodName, int val)
228 {
229         acpi_status status;
230 
231         status = acpi_execute_simple_method(NULL, (char *)methodName, val);
232         return (status == AE_OK) ? 0 : -EIO;
233 }
234 
235 /* Perform a raw HCI call.  Here we don't care about input or output buffer
236  * format.
237  */
238 static acpi_status hci_raw(struct toshiba_acpi_dev *dev,
239                            const u32 in[HCI_WORDS], u32 out[HCI_WORDS])
240 {
241         struct acpi_object_list params;
242         union acpi_object in_objs[HCI_WORDS];
243         struct acpi_buffer results;
244         union acpi_object out_objs[HCI_WORDS + 1];
245         acpi_status status;
246         int i;
247 
248         params.count = HCI_WORDS;
249         params.pointer = in_objs;
250         for (i = 0; i < HCI_WORDS; ++i) {
251                 in_objs[i].type = ACPI_TYPE_INTEGER;
252                 in_objs[i].integer.value = in[i];
253         }
254 
255         results.length = sizeof(out_objs);
256         results.pointer = out_objs;
257 
258         status = acpi_evaluate_object(dev->acpi_dev->handle,
259                                       (char *)dev->method_hci, &params,
260                                       &results);
261         if ((status == AE_OK) && (out_objs->package.count <= HCI_WORDS)) {
262                 for (i = 0; i < out_objs->package.count; ++i) {
263                         out[i] = out_objs->package.elements[i].integer.value;
264                 }
265         }
266 
267         return status;
268 }
269 
270 /* common hci tasks (get or set one or two value)
271  *
272  * In addition to the ACPI status, the HCI system returns a result which
273  * may be useful (such as "not supported").
274  */
275 
276 static acpi_status hci_write1(struct toshiba_acpi_dev *dev, u32 reg,
277                               u32 in1, u32 *result)
278 {
279         u32 in[HCI_WORDS] = { HCI_SET, reg, in1, 0, 0, 0 };
280         u32 out[HCI_WORDS];
281         acpi_status status = hci_raw(dev, in, out);
282         *result = (status == AE_OK) ? out[0] : HCI_FAILURE;
283         return status;
284 }
285 
286 static acpi_status hci_read1(struct toshiba_acpi_dev *dev, u32 reg,
287                              u32 *out1, u32 *result)
288 {
289         u32 in[HCI_WORDS] = { HCI_GET, reg, 0, 0, 0, 0 };
290         u32 out[HCI_WORDS];
291         acpi_status status = hci_raw(dev, in, out);
292         *out1 = out[2];
293         *result = (status == AE_OK) ? out[0] : HCI_FAILURE;
294         return status;
295 }
296 
297 static acpi_status hci_write2(struct toshiba_acpi_dev *dev, u32 reg,
298                               u32 in1, u32 in2, u32 *result)
299 {
300         u32 in[HCI_WORDS] = { HCI_SET, reg, in1, in2, 0, 0 };
301         u32 out[HCI_WORDS];
302         acpi_status status = hci_raw(dev, in, out);
303         *result = (status == AE_OK) ? out[0] : HCI_FAILURE;
304         return status;
305 }
306 
307 static acpi_status hci_read2(struct toshiba_acpi_dev *dev, u32 reg,
308                              u32 *out1, u32 *out2, u32 *result)
309 {
310         u32 in[HCI_WORDS] = { HCI_GET, reg, *out1, *out2, 0, 0 };
311         u32 out[HCI_WORDS];
312         acpi_status status = hci_raw(dev, in, out);
313         *out1 = out[2];
314         *out2 = out[3];
315         *result = (status == AE_OK) ? out[0] : HCI_FAILURE;
316         return status;
317 }
318 
319 /* common sci tasks
320  */
321 
322 static int sci_open(struct toshiba_acpi_dev *dev)
323 {
324         u32 in[HCI_WORDS] = { SCI_OPEN, 0, 0, 0, 0, 0 };
325         u32 out[HCI_WORDS];
326         acpi_status status;
327 
328         status = hci_raw(dev, in, out);
329         if  (ACPI_FAILURE(status) || out[0] == HCI_FAILURE) {
330                 pr_err("ACPI call to open SCI failed\n");
331                 return 0;
332         }
333 
334         if (out[0] == SCI_OPEN_CLOSE_OK) {
335                 return 1;
336         } else if (out[0] == SCI_ALREADY_OPEN) {
337                 pr_info("Toshiba SCI already opened\n");
338                 return 1;
339         } else if (out[0] == SCI_NOT_PRESENT) {
340                 pr_info("Toshiba SCI is not present\n");
341         }
342 
343         return 0;
344 }
345 
346 static void sci_close(struct toshiba_acpi_dev *dev)
347 {
348         u32 in[HCI_WORDS] = { SCI_CLOSE, 0, 0, 0, 0, 0 };
349         u32 out[HCI_WORDS];
350         acpi_status status;
351 
352         status = hci_raw(dev, in, out);
353         if (ACPI_FAILURE(status) || out[0] == HCI_FAILURE) {
354                 pr_err("ACPI call to close SCI failed\n");
355                 return;
356         }
357 
358         if (out[0] == SCI_OPEN_CLOSE_OK)
359                 return;
360         else if (out[0] == SCI_NOT_OPENED)
361                 pr_info("Toshiba SCI not opened\n");
362         else if (out[0] == SCI_NOT_PRESENT)
363                 pr_info("Toshiba SCI is not present\n");
364 }
365 
366 static acpi_status sci_read(struct toshiba_acpi_dev *dev, u32 reg,
367                             u32 *out1, u32 *result)
368 {
369         u32 in[HCI_WORDS] = { SCI_GET, reg, 0, 0, 0, 0 };
370         u32 out[HCI_WORDS];
371         acpi_status status = hci_raw(dev, in, out);
372         *out1 = out[2];
373         *result = (ACPI_SUCCESS(status)) ? out[0] : HCI_FAILURE;
374         return status;
375 }
376 
377 static acpi_status sci_write(struct toshiba_acpi_dev *dev, u32 reg,
378                              u32 in1, u32 *result)
379 {
380         u32 in[HCI_WORDS] = { SCI_SET, reg, in1, 0, 0, 0 };
381         u32 out[HCI_WORDS];
382         acpi_status status = hci_raw(dev, in, out);
383         *result = (ACPI_SUCCESS(status)) ? out[0] : HCI_FAILURE;
384         return status;
385 }
386 
387 /* Illumination support */
388 static int toshiba_illumination_available(struct toshiba_acpi_dev *dev)
389 {
390         u32 in[HCI_WORDS] = { SCI_GET, SCI_ILLUMINATION, 0, 0, 0, 0 };
391         u32 out[HCI_WORDS];
392         acpi_status status;
393 
394         if (!sci_open(dev))
395                 return 0;
396 
397         status = hci_raw(dev, in, out);
398         sci_close(dev);
399         if (ACPI_FAILURE(status) || out[0] == HCI_FAILURE) {
400                 pr_err("ACPI call to query Illumination support failed\n");
401                 return 0;
402         } else if (out[0] == HCI_NOT_SUPPORTED || out[1] != 1) {
403                 pr_info("Illumination device not available\n");
404                 return 0;
405         }
406 
407         return 1;
408 }
409 
410 static void toshiba_illumination_set(struct led_classdev *cdev,
411                                      enum led_brightness brightness)
412 {
413         struct toshiba_acpi_dev *dev = container_of(cdev,
414                         struct toshiba_acpi_dev, led_dev);
415         u32 state, result;
416         acpi_status status;
417 
418         /* First request : initialize communication. */
419         if (!sci_open(dev))
420                 return;
421 
422         /* Switch the illumination on/off */
423         state = brightness ? 1 : 0;
424         status = sci_write(dev, SCI_ILLUMINATION, state, &result);
425         sci_close(dev);
426         if (ACPI_FAILURE(status)) {
427                 pr_err("ACPI call for illumination failed\n");
428                 return;
429         } else if (result == HCI_NOT_SUPPORTED) {
430                 pr_info("Illumination not supported\n");
431                 return;
432         }
433 }
434 
435 static enum led_brightness toshiba_illumination_get(struct led_classdev *cdev)
436 {
437         struct toshiba_acpi_dev *dev = container_of(cdev,
438                         struct toshiba_acpi_dev, led_dev);
439         u32 state, result;
440         acpi_status status;
441 
442         /* First request : initialize communication. */
443         if (!sci_open(dev))
444                 return LED_OFF;
445 
446         /* Check the illumination */
447         status = sci_read(dev, SCI_ILLUMINATION, &state, &result);
448         sci_close(dev);
449         if (ACPI_FAILURE(status) || result == SCI_INPUT_DATA_ERROR) {
450                 pr_err("ACPI call for illumination failed\n");
451                 return LED_OFF;
452         } else if (result == HCI_NOT_SUPPORTED) {
453                 pr_info("Illumination not supported\n");
454                 return LED_OFF;
455         }
456 
457         return state ? LED_FULL : LED_OFF;
458 }
459 
460 /* KBD Illumination */
461 static int toshiba_kbd_illum_status_set(struct toshiba_acpi_dev *dev, u32 time)
462 {
463         u32 result;
464         acpi_status status;
465 
466         if (!sci_open(dev))
467                 return -EIO;
468 
469         status = sci_write(dev, SCI_KBD_ILLUM_STATUS, time, &result);
470         sci_close(dev);
471         if (ACPI_FAILURE(status) || result == SCI_INPUT_DATA_ERROR) {
472                 pr_err("ACPI call to set KBD backlight status failed\n");
473                 return -EIO;
474         } else if (result == HCI_NOT_SUPPORTED) {
475                 pr_info("Keyboard backlight status not supported\n");
476                 return -ENODEV;
477         }
478 
479         return 0;
480 }
481 
482 static int toshiba_kbd_illum_status_get(struct toshiba_acpi_dev *dev, u32 *time)
483 {
484         u32 result;
485         acpi_status status;
486 
487         if (!sci_open(dev))
488                 return -EIO;
489 
490         status = sci_read(dev, SCI_KBD_ILLUM_STATUS, time, &result);
491         sci_close(dev);
492         if (ACPI_FAILURE(status) || result == SCI_INPUT_DATA_ERROR) {
493                 pr_err("ACPI call to get KBD backlight status failed\n");
494                 return -EIO;
495         } else if (result == HCI_NOT_SUPPORTED) {
496                 pr_info("Keyboard backlight status not supported\n");
497                 return -ENODEV;
498         }
499 
500         return 0;
501 }
502 
503 static enum led_brightness toshiba_kbd_backlight_get(struct led_classdev *cdev)
504 {
505         struct toshiba_acpi_dev *dev = container_of(cdev,
506                         struct toshiba_acpi_dev, kbd_led);
507         u32 state, result;
508         acpi_status status;
509 
510         /* Check the keyboard backlight state */
511         status = hci_read1(dev, HCI_KBD_ILLUMINATION, &state, &result);
512         if (ACPI_FAILURE(status) || result == SCI_INPUT_DATA_ERROR) {
513                 pr_err("ACPI call to get the keyboard backlight failed\n");
514                 return LED_OFF;
515         } else if (result == HCI_NOT_SUPPORTED) {
516                 pr_info("Keyboard backlight not supported\n");
517                 return LED_OFF;
518         }
519 
520         return state ? LED_FULL : LED_OFF;
521 }
522 
523 static void toshiba_kbd_backlight_set(struct led_classdev *cdev,
524                                      enum led_brightness brightness)
525 {
526         struct toshiba_acpi_dev *dev = container_of(cdev,
527                         struct toshiba_acpi_dev, kbd_led);
528         u32 state, result;
529         acpi_status status;
530 
531         /* Set the keyboard backlight state */
532         state = brightness ? 1 : 0;
533         status = hci_write1(dev, HCI_KBD_ILLUMINATION, state, &result);
534         if (ACPI_FAILURE(status) || result == SCI_INPUT_DATA_ERROR) {
535                 pr_err("ACPI call to set KBD Illumination mode failed\n");
536                 return;
537         } else if (result == HCI_NOT_SUPPORTED) {
538                 pr_info("Keyboard backlight not supported\n");
539                 return;
540         }
541 }
542 
543 /* TouchPad support */
544 static int toshiba_touchpad_set(struct toshiba_acpi_dev *dev, u32 state)
545 {
546         u32 result;
547         acpi_status status;
548 
549         if (!sci_open(dev))
550                 return -EIO;
551 
552         status = sci_write(dev, SCI_TOUCHPAD, state, &result);
553         sci_close(dev);
554         if (ACPI_FAILURE(status)) {
555                 pr_err("ACPI call to set the touchpad failed\n");
556                 return -EIO;
557         } else if (result == HCI_NOT_SUPPORTED) {
558                 return -ENODEV;
559         }
560 
561         return 0;
562 }
563 
564 static int toshiba_touchpad_get(struct toshiba_acpi_dev *dev, u32 *state)
565 {
566         u32 result;
567         acpi_status status;
568 
569         if (!sci_open(dev))
570                 return -EIO;
571 
572         status = sci_read(dev, SCI_TOUCHPAD, state, &result);
573         sci_close(dev);
574         if (ACPI_FAILURE(status)) {
575                 pr_err("ACPI call to query the touchpad failed\n");
576                 return -EIO;
577         } else if (result == HCI_NOT_SUPPORTED) {
578                 return -ENODEV;
579         }
580 
581         return 0;
582 }
583 
584 /* Eco Mode support */
585 static int toshiba_eco_mode_available(struct toshiba_acpi_dev *dev)
586 {
587         acpi_status status;
588         u32 in[HCI_WORDS] = { HCI_GET, HCI_ECO_MODE, 0, 1, 0, 0 };
589         u32 out[HCI_WORDS];
590 
591         status = hci_raw(dev, in, out);
592         if (ACPI_FAILURE(status) || out[0] == SCI_INPUT_DATA_ERROR) {
593                 pr_info("ACPI call to get ECO led failed\n");
594                 return 0;
595         }
596 
597         return 1;
598 }
599 
600 static enum led_brightness toshiba_eco_mode_get_status(struct led_classdev *cdev)
601 {
602         struct toshiba_acpi_dev *dev = container_of(cdev,
603                         struct toshiba_acpi_dev, eco_led);
604         u32 in[HCI_WORDS] = { HCI_GET, HCI_ECO_MODE, 0, 1, 0, 0 };
605         u32 out[HCI_WORDS];
606         acpi_status status;
607 
608         status = hci_raw(dev, in, out);
609         if (ACPI_FAILURE(status) || out[0] == SCI_INPUT_DATA_ERROR) {
610                 pr_err("ACPI call to get ECO led failed\n");
611                 return LED_OFF;
612         }
613 
614         return out[2] ? LED_FULL : LED_OFF;
615 }
616 
617 static void toshiba_eco_mode_set_status(struct led_classdev *cdev,
618                                      enum led_brightness brightness)
619 {
620         struct toshiba_acpi_dev *dev = container_of(cdev,
621                         struct toshiba_acpi_dev, eco_led);
622         u32 in[HCI_WORDS] = { HCI_SET, HCI_ECO_MODE, 0, 1, 0, 0 };
623         u32 out[HCI_WORDS];
624         acpi_status status;
625 
626         /* Switch the Eco Mode led on/off */
627         in[2] = (brightness) ? 1 : 0;
628         status = hci_raw(dev, in, out);
629         if (ACPI_FAILURE(status) || out[0] == SCI_INPUT_DATA_ERROR) {
630                 pr_err("ACPI call to set ECO led failed\n");
631                 return;
632         }
633 }
634 
635 /* Accelerometer support */
636 static int toshiba_accelerometer_supported(struct toshiba_acpi_dev *dev)
637 {
638         u32 in[HCI_WORDS] = { HCI_GET, HCI_ACCELEROMETER2, 0, 0, 0, 0 };
639         u32 out[HCI_WORDS];
640         acpi_status status;
641 
642         /* Check if the accelerometer call exists,
643          * this call also serves as initialization
644          */
645         status = hci_raw(dev, in, out);
646         if (ACPI_FAILURE(status) || out[0] == SCI_INPUT_DATA_ERROR) {
647                 pr_err("ACPI call to query the accelerometer failed\n");
648                 return -EIO;
649         } else if (out[0] == HCI_DATA_NOT_AVAILABLE ||
650                    out[0] == HCI_NOT_INITIALIZED) {
651                 pr_err("Accelerometer not initialized\n");
652                 return -EIO;
653         } else if (out[0] == HCI_NOT_SUPPORTED) {
654                 pr_info("Accelerometer not supported\n");
655                 return -ENODEV;
656         }
657 
658         return 0;
659 }
660 
661 static int toshiba_accelerometer_get(struct toshiba_acpi_dev *dev,
662                                       u32 *xy, u32 *z)
663 {
664         u32 in[HCI_WORDS] = { HCI_GET, HCI_ACCELEROMETER, 0, 1, 0, 0 };
665         u32 out[HCI_WORDS];
666         acpi_status status;
667 
668         /* Check the Accelerometer status */
669         status = hci_raw(dev, in, out);
670         if (ACPI_FAILURE(status) || out[0] == SCI_INPUT_DATA_ERROR) {
671                 pr_err("ACPI call to query the accelerometer failed\n");
672                 return -EIO;
673         }
674 
675         *xy = out[2];
676         *z = out[4];
677 
678         return 0;
679 }
680 
681 /* Bluetooth rfkill handlers */
682 
683 static u32 hci_get_bt_present(struct toshiba_acpi_dev *dev, bool *present)
684 {
685         u32 hci_result;
686         u32 value, value2;
687 
688         value = 0;
689         value2 = 0;
690         hci_read2(dev, HCI_WIRELESS, &value, &value2, &hci_result);
691         if (hci_result == HCI_SUCCESS)
692                 *present = (value & HCI_WIRELESS_BT_PRESENT) ? true : false;
693 
694         return hci_result;
695 }
696 
697 static u32 hci_get_radio_state(struct toshiba_acpi_dev *dev, bool *radio_state)
698 {
699         u32 hci_result;
700         u32 value, value2;
701 
702         value = 0;
703         value2 = 0x0001;
704         hci_read2(dev, HCI_WIRELESS, &value, &value2, &hci_result);
705 
706         *radio_state = value & HCI_WIRELESS_KILL_SWITCH;
707         return hci_result;
708 }
709 
710 static int bt_rfkill_set_block(void *data, bool blocked)
711 {
712         struct toshiba_acpi_dev *dev = data;
713         u32 result1, result2;
714         u32 value;
715         int err;
716         bool radio_state;
717 
718         value = (blocked == false);
719 
720         mutex_lock(&dev->mutex);
721         if (hci_get_radio_state(dev, &radio_state) != HCI_SUCCESS) {
722                 err = -EIO;
723                 goto out;
724         }
725 
726         if (!radio_state) {
727                 err = 0;
728                 goto out;
729         }
730 
731         hci_write2(dev, HCI_WIRELESS, value, HCI_WIRELESS_BT_POWER, &result1);
732         hci_write2(dev, HCI_WIRELESS, value, HCI_WIRELESS_BT_ATTACH, &result2);
733 
734         if (result1 != HCI_SUCCESS || result2 != HCI_SUCCESS)
735                 err = -EIO;
736         else
737                 err = 0;
738  out:
739         mutex_unlock(&dev->mutex);
740         return err;
741 }
742 
743 static void bt_rfkill_poll(struct rfkill *rfkill, void *data)
744 {
745         bool new_rfk_state;
746         bool value;
747         u32 hci_result;
748         struct toshiba_acpi_dev *dev = data;
749 
750         mutex_lock(&dev->mutex);
751 
752         hci_result = hci_get_radio_state(dev, &value);
753         if (hci_result != HCI_SUCCESS) {
754                 /* Can't do anything useful */
755                 mutex_unlock(&dev->mutex);
756                 return;
757         }
758 
759         new_rfk_state = value;
760 
761         mutex_unlock(&dev->mutex);
762 
763         if (rfkill_set_hw_state(rfkill, !new_rfk_state))
764                 bt_rfkill_set_block(data, true);
765 }
766 
767 static const struct rfkill_ops toshiba_rfk_ops = {
768         .set_block = bt_rfkill_set_block,
769         .poll = bt_rfkill_poll,
770 };
771 
772 static int get_tr_backlight_status(struct toshiba_acpi_dev *dev, bool *enabled)
773 {
774         u32 hci_result;
775         u32 status;
776 
777         hci_read1(dev, HCI_TR_BACKLIGHT, &status, &hci_result);
778         *enabled = !status;
779         return hci_result == HCI_SUCCESS ? 0 : -EIO;
780 }
781 
782 static int set_tr_backlight_status(struct toshiba_acpi_dev *dev, bool enable)
783 {
784         u32 hci_result;
785         u32 value = !enable;
786 
787         hci_write1(dev, HCI_TR_BACKLIGHT, value, &hci_result);
788         return hci_result == HCI_SUCCESS ? 0 : -EIO;
789 }
790 
791 static struct proc_dir_entry *toshiba_proc_dir /*= 0*/ ;
792 
793 static int __get_lcd_brightness(struct toshiba_acpi_dev *dev)
794 {
795         u32 hci_result;
796         u32 value;
797         int brightness = 0;
798 
799         if (dev->tr_backlight_supported) {
800                 bool enabled;
801                 int ret = get_tr_backlight_status(dev, &enabled);
802                 if (ret)
803                         return ret;
804                 if (enabled)
805                         return 0;
806                 brightness++;
807         }
808 
809         hci_read1(dev, HCI_LCD_BRIGHTNESS, &value, &hci_result);
810         if (hci_result == HCI_SUCCESS)
811                 return brightness + (value >> HCI_LCD_BRIGHTNESS_SHIFT);
812 
813         return -EIO;
814 }
815 
816 static int get_lcd_brightness(struct backlight_device *bd)
817 {
818         struct toshiba_acpi_dev *dev = bl_get_data(bd);
819         return __get_lcd_brightness(dev);
820 }
821 
822 static int lcd_proc_show(struct seq_file *m, void *v)
823 {
824         struct toshiba_acpi_dev *dev = m->private;
825         int value;
826         int levels;
827 
828         if (!dev->backlight_dev)
829                 return -ENODEV;
830 
831         levels = dev->backlight_dev->props.max_brightness + 1;
832         value = get_lcd_brightness(dev->backlight_dev);
833         if (value >= 0) {
834                 seq_printf(m, "brightness:              %d\n", value);
835                 seq_printf(m, "brightness_levels:       %d\n", levels);
836                 return 0;
837         }
838 
839         pr_err("Error reading LCD brightness\n");
840         return -EIO;
841 }
842 
843 static int lcd_proc_open(struct inode *inode, struct file *file)
844 {
845         return single_open(file, lcd_proc_show, PDE_DATA(inode));
846 }
847 
848 static int set_lcd_brightness(struct toshiba_acpi_dev *dev, int value)
849 {
850         u32 hci_result;
851 
852         if (dev->tr_backlight_supported) {
853                 bool enable = !value;
854                 int ret = set_tr_backlight_status(dev, enable);
855                 if (ret)
856                         return ret;
857                 if (value)
858                         value--;
859         }
860 
861         value = value << HCI_LCD_BRIGHTNESS_SHIFT;
862         hci_write1(dev, HCI_LCD_BRIGHTNESS, value, &hci_result);
863         return hci_result == HCI_SUCCESS ? 0 : -EIO;
864 }
865 
866 static int set_lcd_status(struct backlight_device *bd)
867 {
868         struct toshiba_acpi_dev *dev = bl_get_data(bd);
869         return set_lcd_brightness(dev, bd->props.brightness);
870 }
871 
872 static ssize_t lcd_proc_write(struct file *file, const char __user *buf,
873                               size_t count, loff_t *pos)
874 {
875         struct toshiba_acpi_dev *dev = PDE_DATA(file_inode(file));
876         char cmd[42];
877         size_t len;
878         int value;
879         int ret;
880         int levels = dev->backlight_dev->props.max_brightness + 1;
881 
882         len = min(count, sizeof(cmd) - 1);
883         if (copy_from_user(cmd, buf, len))
884                 return -EFAULT;
885         cmd[len] = '\0';
886 
887         if (sscanf(cmd, " brightness : %i", &value) == 1 &&
888             value >= 0 && value < levels) {
889                 ret = set_lcd_brightness(dev, value);
890                 if (ret == 0)
891                         ret = count;
892         } else {
893                 ret = -EINVAL;
894         }
895         return ret;
896 }
897 
898 static const struct file_operations lcd_proc_fops = {
899         .owner          = THIS_MODULE,
900         .open           = lcd_proc_open,
901         .read           = seq_read,
902         .llseek         = seq_lseek,
903         .release        = single_release,
904         .write          = lcd_proc_write,
905 };
906 
907 static int get_video_status(struct toshiba_acpi_dev *dev, u32 *status)
908 {
909         u32 hci_result;
910 
911         hci_read1(dev, HCI_VIDEO_OUT, status, &hci_result);
912         return hci_result == HCI_SUCCESS ? 0 : -EIO;
913 }
914 
915 static int video_proc_show(struct seq_file *m, void *v)
916 {
917         struct toshiba_acpi_dev *dev = m->private;
918         u32 value;
919         int ret;
920 
921         ret = get_video_status(dev, &value);
922         if (!ret) {
923                 int is_lcd = (value & HCI_VIDEO_OUT_LCD) ? 1 : 0;
924                 int is_crt = (value & HCI_VIDEO_OUT_CRT) ? 1 : 0;
925                 int is_tv = (value & HCI_VIDEO_OUT_TV) ? 1 : 0;
926                 seq_printf(m, "lcd_out:                 %d\n", is_lcd);
927                 seq_printf(m, "crt_out:                 %d\n", is_crt);
928                 seq_printf(m, "tv_out:                  %d\n", is_tv);
929         }
930 
931         return ret;
932 }
933 
934 static int video_proc_open(struct inode *inode, struct file *file)
935 {
936         return single_open(file, video_proc_show, PDE_DATA(inode));
937 }
938 
939 static ssize_t video_proc_write(struct file *file, const char __user *buf,
940                                 size_t count, loff_t *pos)
941 {
942         struct toshiba_acpi_dev *dev = PDE_DATA(file_inode(file));
943         char *cmd, *buffer;
944         int ret;
945         int value;
946         int remain = count;
947         int lcd_out = -1;
948         int crt_out = -1;
949         int tv_out = -1;
950         u32 video_out;
951 
952         cmd = kmalloc(count + 1, GFP_KERNEL);
953         if (!cmd)
954                 return -ENOMEM;
955         if (copy_from_user(cmd, buf, count)) {
956                 kfree(cmd);
957                 return -EFAULT;
958         }
959         cmd[count] = '\0';
960 
961         buffer = cmd;
962 
963         /* scan expression.  Multiple expressions may be delimited with ;
964          *
965          *  NOTE: to keep scanning simple, invalid fields are ignored
966          */
967         while (remain) {
968                 if (sscanf(buffer, " lcd_out : %i", &value) == 1)
969                         lcd_out = value & 1;
970                 else if (sscanf(buffer, " crt_out : %i", &value) == 1)
971                         crt_out = value & 1;
972                 else if (sscanf(buffer, " tv_out : %i", &value) == 1)
973                         tv_out = value & 1;
974                 /* advance to one character past the next ; */
975                 do {
976                         ++buffer;
977                         --remain;
978                 }
979                 while (remain && *(buffer - 1) != ';');
980         }
981 
982         kfree(cmd);
983 
984         ret = get_video_status(dev, &video_out);
985         if (!ret) {
986                 unsigned int new_video_out = video_out;
987                 if (lcd_out != -1)
988                         _set_bit(&new_video_out, HCI_VIDEO_OUT_LCD, lcd_out);
989                 if (crt_out != -1)
990                         _set_bit(&new_video_out, HCI_VIDEO_OUT_CRT, crt_out);
991                 if (tv_out != -1)
992                         _set_bit(&new_video_out, HCI_VIDEO_OUT_TV, tv_out);
993                 /* To avoid unnecessary video disruption, only write the new
994                  * video setting if something changed. */
995                 if (new_video_out != video_out)
996                         ret = write_acpi_int(METHOD_VIDEO_OUT, new_video_out);
997         }
998 
999         return ret ? ret : count;
1000 }
1001 
1002 static const struct file_operations video_proc_fops = {
1003         .owner          = THIS_MODULE,
1004         .open           = video_proc_open,
1005         .read           = seq_read,
1006         .llseek         = seq_lseek,
1007         .release        = single_release,
1008         .write          = video_proc_write,
1009 };
1010 
1011 static int get_fan_status(struct toshiba_acpi_dev *dev, u32 *status)
1012 {
1013         u32 hci_result;
1014 
1015         hci_read1(dev, HCI_FAN, status, &hci_result);
1016         return hci_result == HCI_SUCCESS ? 0 : -EIO;
1017 }
1018 
1019 static int fan_proc_show(struct seq_file *m, void *v)
1020 {
1021         struct toshiba_acpi_dev *dev = m->private;
1022         int ret;
1023         u32 value;
1024 
1025         ret = get_fan_status(dev, &value);
1026         if (!ret) {
1027                 seq_printf(m, "running:                 %d\n", (value > 0));
1028                 seq_printf(m, "force_on:                %d\n", dev->force_fan);
1029         }
1030 
1031         return ret;
1032 }
1033 
1034 static int fan_proc_open(struct inode *inode, struct file *file)
1035 {
1036         return single_open(file, fan_proc_show, PDE_DATA(inode));
1037 }
1038 
1039 static ssize_t fan_proc_write(struct file *file, const char __user *buf,
1040                               size_t count, loff_t *pos)
1041 {
1042         struct toshiba_acpi_dev *dev = PDE_DATA(file_inode(file));
1043         char cmd[42];
1044         size_t len;
1045         int value;
1046         u32 hci_result;
1047 
1048         len = min(count, sizeof(cmd) - 1);
1049         if (copy_from_user(cmd, buf, len))
1050                 return -EFAULT;
1051         cmd[len] = '\0';
1052 
1053         if (sscanf(cmd, " force_on : %i", &value) == 1 &&
1054             value >= 0 && value <= 1) {
1055                 hci_write1(dev, HCI_FAN, value, &hci_result);
1056                 if (hci_result != HCI_SUCCESS)
1057                         return -EIO;
1058                 else
1059                         dev->force_fan = value;
1060         } else {
1061                 return -EINVAL;
1062         }
1063 
1064         return count;
1065 }
1066 
1067 static const struct file_operations fan_proc_fops = {
1068         .owner          = THIS_MODULE,
1069         .open           = fan_proc_open,
1070         .read           = seq_read,
1071         .llseek         = seq_lseek,
1072         .release        = single_release,
1073         .write          = fan_proc_write,
1074 };
1075 
1076 static int keys_proc_show(struct seq_file *m, void *v)
1077 {
1078         struct toshiba_acpi_dev *dev = m->private;
1079         u32 hci_result;
1080         u32 value;
1081 
1082         if (!dev->key_event_valid && dev->system_event_supported) {
1083                 hci_read1(dev, HCI_SYSTEM_EVENT, &value, &hci_result);
1084                 if (hci_result == HCI_SUCCESS) {
1085                         dev->key_event_valid = 1;
1086                         dev->last_key_event = value;
1087                 } else if (hci_result == HCI_EMPTY) {
1088                         /* better luck next time */
1089                 } else if (hci_result == HCI_NOT_SUPPORTED) {
1090                         /* This is a workaround for an unresolved issue on
1091                          * some machines where system events sporadically
1092                          * become disabled. */
1093                         hci_write1(dev, HCI_SYSTEM_EVENT, 1, &hci_result);
1094                         pr_notice("Re-enabled hotkeys\n");
1095                 } else {
1096                         pr_err("Error reading hotkey status\n");
1097                         return -EIO;
1098                 }
1099         }
1100 
1101         seq_printf(m, "hotkey_ready:            %d\n", dev->key_event_valid);
1102         seq_printf(m, "hotkey:                  0x%04x\n", dev->last_key_event);
1103         return 0;
1104 }
1105 
1106 static int keys_proc_open(struct inode *inode, struct file *file)
1107 {
1108         return single_open(file, keys_proc_show, PDE_DATA(inode));
1109 }
1110 
1111 static ssize_t keys_proc_write(struct file *file, const char __user *buf,
1112                                size_t count, loff_t *pos)
1113 {
1114         struct toshiba_acpi_dev *dev = PDE_DATA(file_inode(file));
1115         char cmd[42];
1116         size_t len;
1117         int value;
1118 
1119         len = min(count, sizeof(cmd) - 1);
1120         if (copy_from_user(cmd, buf, len))
1121                 return -EFAULT;
1122         cmd[len] = '\0';
1123 
1124         if (sscanf(cmd, " hotkey_ready : %i", &value) == 1 && value == 0) {
1125                 dev->key_event_valid = 0;
1126         } else {
1127                 return -EINVAL;
1128         }
1129 
1130         return count;
1131 }
1132 
1133 static const struct file_operations keys_proc_fops = {
1134         .owner          = THIS_MODULE,
1135         .open           = keys_proc_open,
1136         .read           = seq_read,
1137         .llseek         = seq_lseek,
1138         .release        = single_release,
1139         .write          = keys_proc_write,
1140 };
1141 
1142 static int version_proc_show(struct seq_file *m, void *v)
1143 {
1144         seq_printf(m, "driver:                  %s\n", TOSHIBA_ACPI_VERSION);
1145         seq_printf(m, "proc_interface:          %d\n", PROC_INTERFACE_VERSION);
1146         return 0;
1147 }
1148 
1149 static int version_proc_open(struct inode *inode, struct file *file)
1150 {
1151         return single_open(file, version_proc_show, PDE_DATA(inode));
1152 }
1153 
1154 static const struct file_operations version_proc_fops = {
1155         .owner          = THIS_MODULE,
1156         .open           = version_proc_open,
1157         .read           = seq_read,
1158         .llseek         = seq_lseek,
1159         .release        = single_release,
1160 };
1161 
1162 /* proc and module init
1163  */
1164 
1165 #define PROC_TOSHIBA            "toshiba"
1166 
1167 static void create_toshiba_proc_entries(struct toshiba_acpi_dev *dev)
1168 {
1169         if (dev->backlight_dev)
1170                 proc_create_data("lcd", S_IRUGO | S_IWUSR, toshiba_proc_dir,
1171                                  &lcd_proc_fops, dev);
1172         if (dev->video_supported)
1173                 proc_create_data("video", S_IRUGO | S_IWUSR, toshiba_proc_dir,
1174                                  &video_proc_fops, dev);
1175         if (dev->fan_supported)
1176                 proc_create_data("fan", S_IRUGO | S_IWUSR, toshiba_proc_dir,
1177                                  &fan_proc_fops, dev);
1178         if (dev->hotkey_dev)
1179                 proc_create_data("keys", S_IRUGO | S_IWUSR, toshiba_proc_dir,
1180                                  &keys_proc_fops, dev);
1181         proc_create_data("version", S_IRUGO, toshiba_proc_dir,
1182                          &version_proc_fops, dev);
1183 }
1184 
1185 static void remove_toshiba_proc_entries(struct toshiba_acpi_dev *dev)
1186 {
1187         if (dev->backlight_dev)
1188                 remove_proc_entry("lcd", toshiba_proc_dir);
1189         if (dev->video_supported)
1190                 remove_proc_entry("video", toshiba_proc_dir);
1191         if (dev->fan_supported)
1192                 remove_proc_entry("fan", toshiba_proc_dir);
1193         if (dev->hotkey_dev)
1194                 remove_proc_entry("keys", toshiba_proc_dir);
1195         remove_proc_entry("version", toshiba_proc_dir);
1196 }
1197 
1198 static const struct backlight_ops toshiba_backlight_data = {
1199         .options = BL_CORE_SUSPENDRESUME,
1200         .get_brightness = get_lcd_brightness,
1201         .update_status  = set_lcd_status,
1202 };
1203 
1204 /*
1205  * Sysfs files
1206  */
1207 
1208 static ssize_t toshiba_kbd_bl_mode_store(struct device *dev,
1209                                          struct device_attribute *attr,
1210                                          const char *buf, size_t count)
1211 {
1212         struct toshiba_acpi_dev *toshiba = dev_get_drvdata(dev);
1213         int mode = -1;
1214         int time = -1;
1215 
1216         if (sscanf(buf, "%i", &mode) != 1 && (mode != 2 || mode != 1))
1217                 return -EINVAL;
1218 
1219         /* Set the Keyboard Backlight Mode where:
1220          * Mode - Auto (2) | FN-Z (1)
1221          *      Auto - KBD backlight turns off automatically in given time
1222          *      FN-Z - KBD backlight "toggles" when hotkey pressed
1223          */
1224         if (mode != -1 && toshiba->kbd_mode != mode) {
1225                 time = toshiba->kbd_time << HCI_MISC_SHIFT;
1226                 time = time + toshiba->kbd_mode;
1227                 if (toshiba_kbd_illum_status_set(toshiba, time) < 0)
1228                         return -EIO;
1229                 toshiba->kbd_mode = mode;
1230         }
1231 
1232         return count;
1233 }
1234 
1235 static ssize_t toshiba_kbd_bl_mode_show(struct device *dev,
1236                                         struct device_attribute *attr,
1237                                         char *buf)
1238 {
1239         struct toshiba_acpi_dev *toshiba = dev_get_drvdata(dev);
1240         u32 time;
1241 
1242         if (toshiba_kbd_illum_status_get(toshiba, &time) < 0)
1243                 return -EIO;
1244 
1245         return sprintf(buf, "%i\n", time & 0x07);
1246 }
1247 
1248 static ssize_t toshiba_kbd_bl_timeout_store(struct device *dev,
1249                                             struct device_attribute *attr,
1250                                             const char *buf, size_t count)
1251 {
1252         struct toshiba_acpi_dev *toshiba = dev_get_drvdata(dev);
1253         int time = -1;
1254 
1255         if (sscanf(buf, "%i", &time) != 1 && (time < 0 || time > 60))
1256                 return -EINVAL;
1257 
1258         /* Set the Keyboard Backlight Timeout: 0-60 seconds */
1259         if (time != -1 && toshiba->kbd_time != time) {
1260                 time = time << HCI_MISC_SHIFT;
1261                 time = (toshiba->kbd_mode == SCI_KBD_MODE_AUTO) ?
1262                                                         time + 1 : time + 2;
1263                 if (toshiba_kbd_illum_status_set(toshiba, time) < 0)
1264                         return -EIO;
1265                 toshiba->kbd_time = time >> HCI_MISC_SHIFT;
1266         }
1267 
1268         return count;
1269 }
1270 
1271 static ssize_t toshiba_kbd_bl_timeout_show(struct device *dev,
1272                                            struct device_attribute *attr,
1273                                            char *buf)
1274 {
1275         struct toshiba_acpi_dev *toshiba = dev_get_drvdata(dev);
1276         u32 time;
1277 
1278         if (toshiba_kbd_illum_status_get(toshiba, &time) < 0)
1279                 return -EIO;
1280 
1281         return sprintf(buf, "%i\n", time >> HCI_MISC_SHIFT);
1282 }
1283 
1284 static ssize_t toshiba_touchpad_store(struct device *dev,
1285                                       struct device_attribute *attr,
1286                                       const char *buf, size_t count)
1287 {
1288         struct toshiba_acpi_dev *toshiba = dev_get_drvdata(dev);
1289         int state;
1290 
1291         /* Set the TouchPad on/off, 0 - Disable | 1 - Enable */
1292         if (sscanf(buf, "%i", &state) == 1 && (state == 0 || state == 1)) {
1293                 if (toshiba_touchpad_set(toshiba, state) < 0)
1294                         return -EIO;
1295         }
1296 
1297         return count;
1298 }
1299 
1300 static ssize_t toshiba_touchpad_show(struct device *dev,
1301                                      struct device_attribute *attr, char *buf)
1302 {
1303         struct toshiba_acpi_dev *toshiba = dev_get_drvdata(dev);
1304         u32 state;
1305         int ret;
1306 
1307         ret = toshiba_touchpad_get(toshiba, &state);
1308         if (ret < 0)
1309                 return ret;
1310 
1311         return sprintf(buf, "%i\n", state);
1312 }
1313 
1314 static ssize_t toshiba_position_show(struct device *dev,
1315                                      struct device_attribute *attr, char *buf)
1316 {
1317         struct toshiba_acpi_dev *toshiba = dev_get_drvdata(dev);
1318         u32 xyval, zval, tmp;
1319         u16 x, y, z;
1320         int ret;
1321 
1322         xyval = zval = 0;
1323         ret = toshiba_accelerometer_get(toshiba, &xyval, &zval);
1324         if (ret < 0)
1325                 return ret;
1326 
1327         x = xyval & HCI_ACCEL_MASK;
1328         tmp = xyval >> HCI_MISC_SHIFT;
1329         y = tmp & HCI_ACCEL_MASK;
1330         z = zval & HCI_ACCEL_MASK;
1331 
1332         return sprintf(buf, "%d %d %d\n", x, y, z);
1333 }
1334 
1335 static DEVICE_ATTR(kbd_backlight_mode, S_IRUGO | S_IWUSR,
1336                    toshiba_kbd_bl_mode_show, toshiba_kbd_bl_mode_store);
1337 static DEVICE_ATTR(kbd_backlight_timeout, S_IRUGO | S_IWUSR,
1338                    toshiba_kbd_bl_timeout_show, toshiba_kbd_bl_timeout_store);
1339 static DEVICE_ATTR(touchpad, S_IRUGO | S_IWUSR,
1340                    toshiba_touchpad_show, toshiba_touchpad_store);
1341 static DEVICE_ATTR(position, S_IRUGO, toshiba_position_show, NULL);
1342 
1343 static struct attribute *toshiba_attributes[] = {
1344         &dev_attr_kbd_backlight_mode.attr,
1345         &dev_attr_kbd_backlight_timeout.attr,
1346         &dev_attr_touchpad.attr,
1347         &dev_attr_position.attr,
1348         NULL,
1349 };
1350 
1351 static umode_t toshiba_sysfs_is_visible(struct kobject *kobj,
1352                                         struct attribute *attr, int idx)
1353 {
1354         struct device *dev = container_of(kobj, struct device, kobj);
1355         struct toshiba_acpi_dev *drv = dev_get_drvdata(dev);
1356         bool exists = true;
1357 
1358         if (attr == &dev_attr_kbd_backlight_mode.attr)
1359                 exists = (drv->kbd_illum_supported) ? true : false;
1360         else if (attr == &dev_attr_kbd_backlight_timeout.attr)
1361                 exists = (drv->kbd_mode == SCI_KBD_MODE_AUTO) ? true : false;
1362         else if (attr == &dev_attr_touchpad.attr)
1363                 exists = (drv->touchpad_supported) ? true : false;
1364         else if (attr == &dev_attr_position.attr)
1365                 exists = (drv->accelerometer_supported) ? true : false;
1366 
1367         return exists ? attr->mode : 0;
1368 }
1369 
1370 static struct attribute_group toshiba_attr_group = {
1371         .is_visible = toshiba_sysfs_is_visible,
1372         .attrs = toshiba_attributes,
1373 };
1374 
1375 static bool toshiba_acpi_i8042_filter(unsigned char data, unsigned char str,
1376                                       struct serio *port)
1377 {
1378         if (str & 0x20)
1379                 return false;
1380 
1381         if (unlikely(data == 0xe0))
1382                 return false;
1383 
1384         if ((data & 0x7f) == TOS1900_FN_SCAN) {
1385                 schedule_work(&toshiba_acpi->hotkey_work);
1386                 return true;
1387         }
1388 
1389         return false;
1390 }
1391 
1392 static void toshiba_acpi_hotkey_work(struct work_struct *work)
1393 {
1394         acpi_handle ec_handle = ec_get_handle();
1395         acpi_status status;
1396 
1397         if (!ec_handle)
1398                 return;
1399 
1400         status = acpi_evaluate_object(ec_handle, "NTFY", NULL, NULL);
1401         if (ACPI_FAILURE(status))
1402                 pr_err("ACPI NTFY method execution failed\n");
1403 }
1404 
1405 /*
1406  * Returns hotkey scancode, or < 0 on failure.
1407  */
1408 static int toshiba_acpi_query_hotkey(struct toshiba_acpi_dev *dev)
1409 {
1410         unsigned long long value;
1411         acpi_status status;
1412 
1413         status = acpi_evaluate_integer(dev->acpi_dev->handle, "INFO",
1414                                       NULL, &value);
1415         if (ACPI_FAILURE(status)) {
1416                 pr_err("ACPI INFO method execution failed\n");
1417                 return -EIO;
1418         }
1419 
1420         return value;
1421 }
1422 
1423 static void toshiba_acpi_report_hotkey(struct toshiba_acpi_dev *dev,
1424                                        int scancode)
1425 {
1426         if (scancode == 0x100)
1427                 return;
1428 
1429         /* act on key press; ignore key release */
1430         if (scancode & 0x80)
1431                 return;
1432 
1433         if (!sparse_keymap_report_event(dev->hotkey_dev, scancode, 1, true))
1434                 pr_info("Unknown key %x\n", scancode);
1435 }
1436 
1437 static int toshiba_acpi_setup_keyboard(struct toshiba_acpi_dev *dev)
1438 {
1439         acpi_status status;
1440         acpi_handle ec_handle;
1441         int error;
1442         u32 hci_result;
1443 
1444         dev->hotkey_dev = input_allocate_device();
1445         if (!dev->hotkey_dev)
1446                 return -ENOMEM;
1447 
1448         dev->hotkey_dev->name = "Toshiba input device";
1449         dev->hotkey_dev->phys = "toshiba_acpi/input0";
1450         dev->hotkey_dev->id.bustype = BUS_HOST;
1451 
1452         error = sparse_keymap_setup(dev->hotkey_dev, toshiba_acpi_keymap, NULL);
1453         if (error)
1454                 goto err_free_dev;
1455 
1456         /*
1457          * For some machines the SCI responsible for providing hotkey
1458          * notification doesn't fire. We can trigger the notification
1459          * whenever the Fn key is pressed using the NTFY method, if
1460          * supported, so if it's present set up an i8042 key filter
1461          * for this purpose.
1462          */
1463         status = AE_ERROR;
1464         ec_handle = ec_get_handle();
1465         if (ec_handle && acpi_has_method(ec_handle, "NTFY")) {
1466                 INIT_WORK(&dev->hotkey_work, toshiba_acpi_hotkey_work);
1467 
1468                 error = i8042_install_filter(toshiba_acpi_i8042_filter);
1469                 if (error) {
1470                         pr_err("Error installing key filter\n");
1471                         goto err_free_keymap;
1472                 }
1473 
1474                 dev->ntfy_supported = 1;
1475         }
1476 
1477         /*
1478          * Determine hotkey query interface. Prefer using the INFO
1479          * method when it is available.
1480          */
1481         if (acpi_has_method(dev->acpi_dev->handle, "INFO"))
1482                 dev->info_supported = 1;
1483         else {
1484                 hci_write1(dev, HCI_SYSTEM_EVENT, 1, &hci_result);
1485                 if (hci_result == HCI_SUCCESS)
1486                         dev->system_event_supported = 1;
1487         }
1488 
1489         if (!dev->info_supported && !dev->system_event_supported) {
1490                 pr_warn("No hotkey query interface found\n");
1491                 goto err_remove_filter;
1492         }
1493 
1494         status = acpi_evaluate_object(dev->acpi_dev->handle, "ENAB", NULL, NULL);
1495         if (ACPI_FAILURE(status)) {
1496                 pr_info("Unable to enable hotkeys\n");
1497                 error = -ENODEV;
1498                 goto err_remove_filter;
1499         }
1500 
1501         error = input_register_device(dev->hotkey_dev);
1502         if (error) {
1503                 pr_info("Unable to register input device\n");
1504                 goto err_remove_filter;
1505         }
1506 
1507         hci_write1(dev, HCI_HOTKEY_EVENT, HCI_HOTKEY_ENABLE, &hci_result);
1508         return 0;
1509 
1510  err_remove_filter:
1511         if (dev->ntfy_supported)
1512                 i8042_remove_filter(toshiba_acpi_i8042_filter);
1513  err_free_keymap:
1514         sparse_keymap_free(dev->hotkey_dev);
1515  err_free_dev:
1516         input_free_device(dev->hotkey_dev);
1517         dev->hotkey_dev = NULL;
1518         return error;
1519 }
1520 
1521 static int toshiba_acpi_setup_backlight(struct toshiba_acpi_dev *dev)
1522 {
1523         struct backlight_properties props;
1524         int brightness;
1525         int ret;
1526         bool enabled;
1527 
1528         /*
1529          * Some machines don't support the backlight methods at all, and
1530          * others support it read-only. Either of these is pretty useless,
1531          * so only register the backlight device if the backlight method
1532          * supports both reads and writes.
1533          */
1534         brightness = __get_lcd_brightness(dev);
1535         if (brightness < 0)
1536                 return 0;
1537         ret = set_lcd_brightness(dev, brightness);
1538         if (ret) {
1539                 pr_debug("Backlight method is read-only, disabling backlight support\n");
1540                 return 0;
1541         }
1542 
1543         /* Determine whether or not BIOS supports transflective backlight */
1544         ret = get_tr_backlight_status(dev, &enabled);
1545         dev->tr_backlight_supported = !ret;
1546 
1547         memset(&props, 0, sizeof(props));
1548         props.type = BACKLIGHT_PLATFORM;
1549         props.max_brightness = HCI_LCD_BRIGHTNESS_LEVELS - 1;
1550 
1551         /* adding an extra level and having 0 change to transflective mode */
1552         if (dev->tr_backlight_supported)
1553                 props.max_brightness++;
1554 
1555         dev->backlight_dev = backlight_device_register("toshiba",
1556                                                        &dev->acpi_dev->dev,
1557                                                        dev,
1558                                                        &toshiba_backlight_data,
1559                                                        &props);
1560         if (IS_ERR(dev->backlight_dev)) {
1561                 ret = PTR_ERR(dev->backlight_dev);
1562                 pr_err("Could not register toshiba backlight device\n");
1563                 dev->backlight_dev = NULL;
1564                 return ret;
1565         }
1566 
1567         dev->backlight_dev->props.brightness = brightness;
1568         return 0;
1569 }
1570 
1571 static int toshiba_acpi_remove(struct acpi_device *acpi_dev)
1572 {
1573         struct toshiba_acpi_dev *dev = acpi_driver_data(acpi_dev);
1574 
1575         remove_toshiba_proc_entries(dev);
1576 
1577         if (dev->sysfs_created)
1578                 sysfs_remove_group(&dev->acpi_dev->dev.kobj,
1579                                    &toshiba_attr_group);
1580 
1581         if (dev->ntfy_supported) {
1582                 i8042_remove_filter(toshiba_acpi_i8042_filter);
1583                 cancel_work_sync(&dev->hotkey_work);
1584         }
1585 
1586         if (dev->hotkey_dev) {
1587                 input_unregister_device(dev->hotkey_dev);
1588                 sparse_keymap_free(dev->hotkey_dev);
1589         }
1590 
1591         if (dev->bt_rfk) {
1592                 rfkill_unregister(dev->bt_rfk);
1593                 rfkill_destroy(dev->bt_rfk);
1594         }
1595 
1596         if (dev->backlight_dev)
1597                 backlight_device_unregister(dev->backlight_dev);
1598 
1599         if (dev->illumination_supported)
1600                 led_classdev_unregister(&dev->led_dev);
1601 
1602         if (dev->kbd_led_registered)
1603                 led_classdev_unregister(&dev->kbd_led);
1604 
1605         if (dev->eco_supported)
1606                 led_classdev_unregister(&dev->eco_led);
1607 
1608         if (toshiba_acpi)
1609                 toshiba_acpi = NULL;
1610 
1611         kfree(dev);
1612 
1613         return 0;
1614 }
1615 
1616 static const char *find_hci_method(acpi_handle handle)
1617 {
1618         if (acpi_has_method(handle, "GHCI"))
1619                 return "GHCI";
1620 
1621         if (acpi_has_method(handle, "SPFC"))
1622                 return "SPFC";
1623 
1624         return NULL;
1625 }
1626 
1627 static int toshiba_acpi_add(struct acpi_device *acpi_dev)
1628 {
1629         struct toshiba_acpi_dev *dev;
1630         const char *hci_method;
1631         u32 dummy;
1632         bool bt_present;
1633         int ret = 0;
1634 
1635         if (toshiba_acpi)
1636                 return -EBUSY;
1637 
1638         pr_info("Toshiba Laptop ACPI Extras version %s\n",
1639                TOSHIBA_ACPI_VERSION);
1640 
1641         hci_method = find_hci_method(acpi_dev->handle);
1642         if (!hci_method) {
1643                 pr_err("HCI interface not found\n");
1644                 return -ENODEV;
1645         }
1646 
1647         dev = kzalloc(sizeof(*dev), GFP_KERNEL);
1648         if (!dev)
1649                 return -ENOMEM;
1650         dev->acpi_dev = acpi_dev;
1651         dev->method_hci = hci_method;
1652         acpi_dev->driver_data = dev;
1653         dev_set_drvdata(&acpi_dev->dev, dev);
1654 
1655         if (toshiba_acpi_setup_keyboard(dev))
1656                 pr_info("Unable to activate hotkeys\n");
1657 
1658         mutex_init(&dev->mutex);
1659 
1660         ret = toshiba_acpi_setup_backlight(dev);
1661         if (ret)
1662                 goto error;
1663 
1664         /* Register rfkill switch for Bluetooth */
1665         if (hci_get_bt_present(dev, &bt_present) == HCI_SUCCESS && bt_present) {
1666                 dev->bt_rfk = rfkill_alloc("Toshiba Bluetooth",
1667                                            &acpi_dev->dev,
1668                                            RFKILL_TYPE_BLUETOOTH,
1669                                            &toshiba_rfk_ops,
1670                                            dev);
1671                 if (!dev->bt_rfk) {
1672                         pr_err("unable to allocate rfkill device\n");
1673                         ret = -ENOMEM;
1674                         goto error;
1675                 }
1676 
1677                 ret = rfkill_register(dev->bt_rfk);
1678                 if (ret) {
1679                         pr_err("unable to register rfkill device\n");
1680                         rfkill_destroy(dev->bt_rfk);
1681                         goto error;
1682                 }
1683         }
1684 
1685         if (toshiba_illumination_available(dev)) {
1686                 dev->led_dev.name = "toshiba::illumination";
1687                 dev->led_dev.max_brightness = 1;
1688                 dev->led_dev.brightness_set = toshiba_illumination_set;
1689                 dev->led_dev.brightness_get = toshiba_illumination_get;
1690                 if (!led_classdev_register(&acpi_dev->dev, &dev->led_dev))
1691                         dev->illumination_supported = 1;
1692         }
1693 
1694         if (toshiba_eco_mode_available(dev)) {
1695                 dev->eco_led.name = "toshiba::eco_mode";
1696                 dev->eco_led.max_brightness = 1;
1697                 dev->eco_led.brightness_set = toshiba_eco_mode_set_status;
1698                 dev->eco_led.brightness_get = toshiba_eco_mode_get_status;
1699                 if (!led_classdev_register(&dev->acpi_dev->dev, &dev->eco_led))
1700                         dev->eco_supported = 1;
1701         }
1702 
1703         ret = toshiba_kbd_illum_status_get(dev, &dummy);
1704         if (!ret) {
1705                 dev->kbd_time = dummy >> HCI_MISC_SHIFT;
1706                 dev->kbd_mode = dummy & 0x07;
1707         }
1708         dev->kbd_illum_supported = !ret;
1709         /*
1710          * Only register the LED if KBD illumination is supported
1711          * and the keyboard backlight operation mode is set to FN-Z
1712          */
1713         if (dev->kbd_illum_supported && dev->kbd_mode == SCI_KBD_MODE_FNZ) {
1714                 dev->kbd_led.name = "toshiba::kbd_backlight";
1715                 dev->kbd_led.max_brightness = 1;
1716                 dev->kbd_led.brightness_set = toshiba_kbd_backlight_set;
1717                 dev->kbd_led.brightness_get = toshiba_kbd_backlight_get;
1718                 if (!led_classdev_register(&dev->acpi_dev->dev, &dev->kbd_led))
1719                         dev->kbd_led_registered = 1;
1720         }
1721 
1722         ret = toshiba_touchpad_get(dev, &dummy);
1723         dev->touchpad_supported = !ret;
1724 
1725         ret = toshiba_accelerometer_supported(dev);
1726         dev->accelerometer_supported = !ret;
1727 
1728         /* Determine whether or not BIOS supports fan and video interfaces */
1729 
1730         ret = get_video_status(dev, &dummy);
1731         dev->video_supported = !ret;
1732 
1733         ret = get_fan_status(dev, &dummy);
1734         dev->fan_supported = !ret;
1735 
1736         ret = sysfs_create_group(&dev->acpi_dev->dev.kobj,
1737                                  &toshiba_attr_group);
1738         if (ret) {
1739                 dev->sysfs_created = 0;
1740                 goto error;
1741         }
1742         dev->sysfs_created = !ret;
1743 
1744         create_toshiba_proc_entries(dev);
1745 
1746         toshiba_acpi = dev;
1747 
1748         return 0;
1749 
1750 error:
1751         toshiba_acpi_remove(acpi_dev);
1752         return ret;
1753 }
1754 
1755 static void toshiba_acpi_notify(struct acpi_device *acpi_dev, u32 event)
1756 {
1757         struct toshiba_acpi_dev *dev = acpi_driver_data(acpi_dev);
1758         u32 hci_result, value;
1759         int retries = 3;
1760         int scancode;
1761 
1762         if (event != 0x80)
1763                 return;
1764 
1765         if (dev->info_supported) {
1766                 scancode = toshiba_acpi_query_hotkey(dev);
1767                 if (scancode < 0)
1768                         pr_err("Failed to query hotkey event\n");
1769                 else if (scancode != 0)
1770                         toshiba_acpi_report_hotkey(dev, scancode);
1771         } else if (dev->system_event_supported) {
1772                 do {
1773                         hci_read1(dev, HCI_SYSTEM_EVENT, &value, &hci_result);
1774                         switch (hci_result) {
1775                         case HCI_SUCCESS:
1776                                 toshiba_acpi_report_hotkey(dev, (int)value);
1777                                 break;
1778                         case HCI_NOT_SUPPORTED:
1779                                 /*
1780                                  * This is a workaround for an unresolved
1781                                  * issue on some machines where system events
1782                                  * sporadically become disabled.
1783                                  */
1784                                 hci_write1(dev, HCI_SYSTEM_EVENT, 1,
1785                                            &hci_result);
1786                                 pr_notice("Re-enabled hotkeys\n");
1787                                 /* fall through */
1788                         default:
1789                                 retries--;
1790                                 break;
1791                         }
1792                 } while (retries && hci_result != HCI_EMPTY);
1793         }
1794 }
1795 
1796 #ifdef CONFIG_PM_SLEEP
1797 static int toshiba_acpi_suspend(struct device *device)
1798 {
1799         struct toshiba_acpi_dev *dev = acpi_driver_data(to_acpi_device(device));
1800         u32 result;
1801 
1802         if (dev->hotkey_dev)
1803                 hci_write1(dev, HCI_HOTKEY_EVENT, HCI_HOTKEY_DISABLE, &result);
1804 
1805         return 0;
1806 }
1807 
1808 static int toshiba_acpi_resume(struct device *device)
1809 {
1810         struct toshiba_acpi_dev *dev = acpi_driver_data(to_acpi_device(device));
1811         u32 result;
1812 
1813         if (dev->hotkey_dev)
1814                 hci_write1(dev, HCI_HOTKEY_EVENT, HCI_HOTKEY_ENABLE, &result);
1815 
1816         return 0;
1817 }
1818 #endif
1819 
1820 static SIMPLE_DEV_PM_OPS(toshiba_acpi_pm,
1821                          toshiba_acpi_suspend, toshiba_acpi_resume);
1822 
1823 static struct acpi_driver toshiba_acpi_driver = {
1824         .name   = "Toshiba ACPI driver",
1825         .owner  = THIS_MODULE,
1826         .ids    = toshiba_device_ids,
1827         .flags  = ACPI_DRIVER_ALL_NOTIFY_EVENTS,
1828         .ops    = {
1829                 .add            = toshiba_acpi_add,
1830                 .remove         = toshiba_acpi_remove,
1831                 .notify         = toshiba_acpi_notify,
1832         },
1833         .drv.pm = &toshiba_acpi_pm,
1834 };
1835 
1836 static int __init toshiba_acpi_init(void)
1837 {
1838         int ret;
1839 
1840         /*
1841          * Machines with this WMI guid aren't supported due to bugs in
1842          * their AML. This check relies on wmi initializing before
1843          * toshiba_acpi to guarantee guids have been identified.
1844          */
1845         if (wmi_has_guid(TOSHIBA_WMI_EVENT_GUID))
1846                 return -ENODEV;
1847 
1848         toshiba_proc_dir = proc_mkdir(PROC_TOSHIBA, acpi_root_dir);
1849         if (!toshiba_proc_dir) {
1850                 pr_err("Unable to create proc dir " PROC_TOSHIBA "\n");
1851                 return -ENODEV;
1852         }
1853 
1854         ret = acpi_bus_register_driver(&toshiba_acpi_driver);
1855         if (ret) {
1856                 pr_err("Failed to register ACPI driver: %d\n", ret);
1857                 remove_proc_entry(PROC_TOSHIBA, acpi_root_dir);
1858         }
1859 
1860         return ret;
1861 }
1862 
1863 static void __exit toshiba_acpi_exit(void)
1864 {
1865         acpi_bus_unregister_driver(&toshiba_acpi_driver);
1866         if (toshiba_proc_dir)
1867                 remove_proc_entry(PROC_TOSHIBA, acpi_root_dir);
1868 }
1869 
1870 module_init(toshiba_acpi_init);
1871 module_exit(toshiba_acpi_exit);
1872 

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