This source file includes following definitions.
- wait_read
- send_byte
- send_command
- send_argument
- read_smc
- write_smc
- read_register_count
- applesmc_read_entry
- applesmc_write_entry
- applesmc_get_entry_by_index
- applesmc_get_lower_bound
- applesmc_get_upper_bound
- applesmc_get_entry_by_key
- applesmc_read_key
- applesmc_write_key
- applesmc_has_key
- applesmc_read_s16
- applesmc_device_init
- applesmc_init_index
- applesmc_init_smcreg_try
- applesmc_destroy_smcreg
- applesmc_init_smcreg
- applesmc_probe
- applesmc_pm_resume
- applesmc_pm_restore
- applesmc_calibrate
- applesmc_idev_poll
- applesmc_name_show
- applesmc_position_show
- applesmc_light_show
- applesmc_show_sensor_label
- applesmc_show_temperature
- applesmc_show_fan_speed
- applesmc_store_fan_speed
- applesmc_show_fan_manual
- applesmc_store_fan_manual
- applesmc_show_fan_position
- applesmc_calibrate_show
- applesmc_calibrate_store
- applesmc_backlight_set
- applesmc_brightness_set
- applesmc_key_count_show
- applesmc_key_at_index_read_show
- applesmc_key_at_index_data_length_show
- applesmc_key_at_index_type_show
- applesmc_key_at_index_name_show
- applesmc_key_at_index_show
- applesmc_key_at_index_store
- applesmc_destroy_nodes
- applesmc_create_nodes
- applesmc_create_accelerometer
- applesmc_release_accelerometer
- applesmc_create_light_sensor
- applesmc_release_light_sensor
- applesmc_create_key_backlight
- applesmc_release_key_backlight
- applesmc_dmi_match
- applesmc_init
- applesmc_exit
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17
18 #define pr_fmt(fmt) KBUILD_MODNAME ": " fmt
19
20 #include <linux/delay.h>
21 #include <linux/platform_device.h>
22 #include <linux/input-polldev.h>
23 #include <linux/kernel.h>
24 #include <linux/slab.h>
25 #include <linux/module.h>
26 #include <linux/timer.h>
27 #include <linux/dmi.h>
28 #include <linux/mutex.h>
29 #include <linux/hwmon-sysfs.h>
30 #include <linux/io.h>
31 #include <linux/leds.h>
32 #include <linux/hwmon.h>
33 #include <linux/workqueue.h>
34 #include <linux/err.h>
35
36
37 #define APPLESMC_DATA_PORT 0x300
38
39 #define APPLESMC_CMD_PORT 0x304
40
41 #define APPLESMC_NR_PORTS 32
42
43 #define APPLESMC_MAX_DATA_LENGTH 32
44
45
46 #define APPLESMC_MIN_WAIT 0x0010
47 #define APPLESMC_RETRY_WAIT 0x0100
48 #define APPLESMC_MAX_WAIT 0x20000
49
50 #define APPLESMC_READ_CMD 0x10
51 #define APPLESMC_WRITE_CMD 0x11
52 #define APPLESMC_GET_KEY_BY_INDEX_CMD 0x12
53 #define APPLESMC_GET_KEY_TYPE_CMD 0x13
54
55 #define KEY_COUNT_KEY "#KEY"
56
57 #define LIGHT_SENSOR_LEFT_KEY "ALV0"
58 #define LIGHT_SENSOR_RIGHT_KEY "ALV1"
59 #define BACKLIGHT_KEY "LKSB"
60
61 #define CLAMSHELL_KEY "MSLD"
62
63 #define MOTION_SENSOR_X_KEY "MO_X"
64 #define MOTION_SENSOR_Y_KEY "MO_Y"
65 #define MOTION_SENSOR_Z_KEY "MO_Z"
66 #define MOTION_SENSOR_KEY "MOCN"
67
68 #define FANS_COUNT "FNum"
69 #define FANS_MANUAL "FS! "
70 #define FAN_ID_FMT "F%dID"
71
72 #define TEMP_SENSOR_TYPE "sp78"
73
74
75 static const char *const fan_speed_fmt[] = {
76 "F%dAc",
77 "F%dMn",
78 "F%dMx",
79 "F%dSf",
80 "F%dTg",
81 };
82
83 #define INIT_TIMEOUT_MSECS 5000
84 #define INIT_WAIT_MSECS 50
85
86 #define APPLESMC_POLL_INTERVAL 50
87 #define APPLESMC_INPUT_FUZZ 4
88 #define APPLESMC_INPUT_FLAT 4
89
90 #define to_index(attr) (to_sensor_dev_attr(attr)->index & 0xffff)
91 #define to_option(attr) (to_sensor_dev_attr(attr)->index >> 16)
92
93
94 struct applesmc_dev_attr {
95 struct sensor_device_attribute sda;
96 char name[32];
97 };
98
99
100 struct applesmc_node_group {
101 char *format;
102 void *show;
103 void *store;
104 int option;
105 struct applesmc_dev_attr *nodes;
106 };
107
108
109 struct applesmc_entry {
110 char key[5];
111 u8 valid;
112 u8 len;
113 char type[5];
114 u8 flags;
115 };
116
117
118 static struct applesmc_registers {
119 struct mutex mutex;
120 unsigned int key_count;
121 unsigned int fan_count;
122 unsigned int temp_count;
123 unsigned int temp_begin;
124 unsigned int temp_end;
125 unsigned int index_count;
126 int num_light_sensors;
127 bool has_accelerometer;
128 bool has_key_backlight;
129 bool init_complete;
130 struct applesmc_entry *cache;
131 const char **index;
132 } smcreg = {
133 .mutex = __MUTEX_INITIALIZER(smcreg.mutex),
134 };
135
136 static const int debug;
137 static struct platform_device *pdev;
138 static s16 rest_x;
139 static s16 rest_y;
140 static u8 backlight_state[2];
141
142 static struct device *hwmon_dev;
143 static struct input_polled_dev *applesmc_idev;
144
145
146
147
148
149 static unsigned int key_at_index;
150
151 static struct workqueue_struct *applesmc_led_wq;
152
153
154
155
156
157 static int wait_read(void)
158 {
159 u8 status;
160 int us;
161 for (us = APPLESMC_MIN_WAIT; us < APPLESMC_MAX_WAIT; us <<= 1) {
162 udelay(us);
163 status = inb(APPLESMC_CMD_PORT);
164
165 if (status & 0x01)
166 return 0;
167 }
168
169 pr_warn("wait_read() fail: 0x%02x\n", status);
170 return -EIO;
171 }
172
173
174
175
176
177 static int send_byte(u8 cmd, u16 port)
178 {
179 u8 status;
180 int us;
181
182 outb(cmd, port);
183 for (us = APPLESMC_MIN_WAIT; us < APPLESMC_MAX_WAIT; us <<= 1) {
184 udelay(us);
185 status = inb(APPLESMC_CMD_PORT);
186
187 if (status & 0x02)
188 continue;
189
190 if (status & 0x04)
191 return 0;
192
193 if (us << 1 == APPLESMC_MAX_WAIT)
194 break;
195
196 udelay(APPLESMC_RETRY_WAIT);
197 outb(cmd, port);
198 }
199
200 pr_warn("send_byte(0x%02x, 0x%04x) fail: 0x%02x\n", cmd, port, status);
201 return -EIO;
202 }
203
204 static int send_command(u8 cmd)
205 {
206 return send_byte(cmd, APPLESMC_CMD_PORT);
207 }
208
209 static int send_argument(const char *key)
210 {
211 int i;
212
213 for (i = 0; i < 4; i++)
214 if (send_byte(key[i], APPLESMC_DATA_PORT))
215 return -EIO;
216 return 0;
217 }
218
219 static int read_smc(u8 cmd, const char *key, u8 *buffer, u8 len)
220 {
221 u8 status, data = 0;
222 int i;
223
224 if (send_command(cmd) || send_argument(key)) {
225 pr_warn("%.4s: read arg fail\n", key);
226 return -EIO;
227 }
228
229
230 if (send_byte(len, APPLESMC_DATA_PORT)) {
231 pr_warn("%.4s: read len fail\n", key);
232 return -EIO;
233 }
234
235 for (i = 0; i < len; i++) {
236 if (wait_read()) {
237 pr_warn("%.4s: read data[%d] fail\n", key, i);
238 return -EIO;
239 }
240 buffer[i] = inb(APPLESMC_DATA_PORT);
241 }
242
243
244 for (i = 0; i < 16; i++) {
245 udelay(APPLESMC_MIN_WAIT);
246 status = inb(APPLESMC_CMD_PORT);
247 if (!(status & 0x01))
248 break;
249 data = inb(APPLESMC_DATA_PORT);
250 }
251 if (i)
252 pr_warn("flushed %d bytes, last value is: %d\n", i, data);
253
254 return 0;
255 }
256
257 static int write_smc(u8 cmd, const char *key, const u8 *buffer, u8 len)
258 {
259 int i;
260
261 if (send_command(cmd) || send_argument(key)) {
262 pr_warn("%s: write arg fail\n", key);
263 return -EIO;
264 }
265
266 if (send_byte(len, APPLESMC_DATA_PORT)) {
267 pr_warn("%.4s: write len fail\n", key);
268 return -EIO;
269 }
270
271 for (i = 0; i < len; i++) {
272 if (send_byte(buffer[i], APPLESMC_DATA_PORT)) {
273 pr_warn("%s: write data fail\n", key);
274 return -EIO;
275 }
276 }
277
278 return 0;
279 }
280
281 static int read_register_count(unsigned int *count)
282 {
283 __be32 be;
284 int ret;
285
286 ret = read_smc(APPLESMC_READ_CMD, KEY_COUNT_KEY, (u8 *)&be, 4);
287 if (ret)
288 return ret;
289
290 *count = be32_to_cpu(be);
291 return 0;
292 }
293
294
295
296
297
298
299
300
301 static int applesmc_read_entry(const struct applesmc_entry *entry,
302 u8 *buf, u8 len)
303 {
304 int ret;
305
306 if (entry->len != len)
307 return -EINVAL;
308 mutex_lock(&smcreg.mutex);
309 ret = read_smc(APPLESMC_READ_CMD, entry->key, buf, len);
310 mutex_unlock(&smcreg.mutex);
311
312 return ret;
313 }
314
315 static int applesmc_write_entry(const struct applesmc_entry *entry,
316 const u8 *buf, u8 len)
317 {
318 int ret;
319
320 if (entry->len != len)
321 return -EINVAL;
322 mutex_lock(&smcreg.mutex);
323 ret = write_smc(APPLESMC_WRITE_CMD, entry->key, buf, len);
324 mutex_unlock(&smcreg.mutex);
325 return ret;
326 }
327
328 static const struct applesmc_entry *applesmc_get_entry_by_index(int index)
329 {
330 struct applesmc_entry *cache = &smcreg.cache[index];
331 u8 key[4], info[6];
332 __be32 be;
333 int ret = 0;
334
335 if (cache->valid)
336 return cache;
337
338 mutex_lock(&smcreg.mutex);
339
340 if (cache->valid)
341 goto out;
342 be = cpu_to_be32(index);
343 ret = read_smc(APPLESMC_GET_KEY_BY_INDEX_CMD, (u8 *)&be, key, 4);
344 if (ret)
345 goto out;
346 ret = read_smc(APPLESMC_GET_KEY_TYPE_CMD, key, info, 6);
347 if (ret)
348 goto out;
349
350 memcpy(cache->key, key, 4);
351 cache->len = info[0];
352 memcpy(cache->type, &info[1], 4);
353 cache->flags = info[5];
354 cache->valid = 1;
355
356 out:
357 mutex_unlock(&smcreg.mutex);
358 if (ret)
359 return ERR_PTR(ret);
360 return cache;
361 }
362
363 static int applesmc_get_lower_bound(unsigned int *lo, const char *key)
364 {
365 int begin = 0, end = smcreg.key_count;
366 const struct applesmc_entry *entry;
367
368 while (begin != end) {
369 int middle = begin + (end - begin) / 2;
370 entry = applesmc_get_entry_by_index(middle);
371 if (IS_ERR(entry)) {
372 *lo = 0;
373 return PTR_ERR(entry);
374 }
375 if (strcmp(entry->key, key) < 0)
376 begin = middle + 1;
377 else
378 end = middle;
379 }
380
381 *lo = begin;
382 return 0;
383 }
384
385 static int applesmc_get_upper_bound(unsigned int *hi, const char *key)
386 {
387 int begin = 0, end = smcreg.key_count;
388 const struct applesmc_entry *entry;
389
390 while (begin != end) {
391 int middle = begin + (end - begin) / 2;
392 entry = applesmc_get_entry_by_index(middle);
393 if (IS_ERR(entry)) {
394 *hi = smcreg.key_count;
395 return PTR_ERR(entry);
396 }
397 if (strcmp(key, entry->key) < 0)
398 end = middle;
399 else
400 begin = middle + 1;
401 }
402
403 *hi = begin;
404 return 0;
405 }
406
407 static const struct applesmc_entry *applesmc_get_entry_by_key(const char *key)
408 {
409 int begin, end;
410 int ret;
411
412 ret = applesmc_get_lower_bound(&begin, key);
413 if (ret)
414 return ERR_PTR(ret);
415 ret = applesmc_get_upper_bound(&end, key);
416 if (ret)
417 return ERR_PTR(ret);
418 if (end - begin != 1)
419 return ERR_PTR(-EINVAL);
420
421 return applesmc_get_entry_by_index(begin);
422 }
423
424 static int applesmc_read_key(const char *key, u8 *buffer, u8 len)
425 {
426 const struct applesmc_entry *entry;
427
428 entry = applesmc_get_entry_by_key(key);
429 if (IS_ERR(entry))
430 return PTR_ERR(entry);
431
432 return applesmc_read_entry(entry, buffer, len);
433 }
434
435 static int applesmc_write_key(const char *key, const u8 *buffer, u8 len)
436 {
437 const struct applesmc_entry *entry;
438
439 entry = applesmc_get_entry_by_key(key);
440 if (IS_ERR(entry))
441 return PTR_ERR(entry);
442
443 return applesmc_write_entry(entry, buffer, len);
444 }
445
446 static int applesmc_has_key(const char *key, bool *value)
447 {
448 const struct applesmc_entry *entry;
449
450 entry = applesmc_get_entry_by_key(key);
451 if (IS_ERR(entry) && PTR_ERR(entry) != -EINVAL)
452 return PTR_ERR(entry);
453
454 *value = !IS_ERR(entry);
455 return 0;
456 }
457
458
459
460
461 static int applesmc_read_s16(const char *key, s16 *value)
462 {
463 u8 buffer[2];
464 int ret;
465
466 ret = applesmc_read_key(key, buffer, 2);
467 if (ret)
468 return ret;
469
470 *value = ((s16)buffer[0] << 8) | buffer[1];
471 return 0;
472 }
473
474
475
476
477 static void applesmc_device_init(void)
478 {
479 int total;
480 u8 buffer[2];
481
482 if (!smcreg.has_accelerometer)
483 return;
484
485 for (total = INIT_TIMEOUT_MSECS; total > 0; total -= INIT_WAIT_MSECS) {
486 if (!applesmc_read_key(MOTION_SENSOR_KEY, buffer, 2) &&
487 (buffer[0] != 0x00 || buffer[1] != 0x00))
488 return;
489 buffer[0] = 0xe0;
490 buffer[1] = 0x00;
491 applesmc_write_key(MOTION_SENSOR_KEY, buffer, 2);
492 msleep(INIT_WAIT_MSECS);
493 }
494
495 pr_warn("failed to init the device\n");
496 }
497
498 static int applesmc_init_index(struct applesmc_registers *s)
499 {
500 const struct applesmc_entry *entry;
501 unsigned int i;
502
503 if (s->index)
504 return 0;
505
506 s->index = kcalloc(s->temp_count, sizeof(s->index[0]), GFP_KERNEL);
507 if (!s->index)
508 return -ENOMEM;
509
510 for (i = s->temp_begin; i < s->temp_end; i++) {
511 entry = applesmc_get_entry_by_index(i);
512 if (IS_ERR(entry))
513 continue;
514 if (strcmp(entry->type, TEMP_SENSOR_TYPE))
515 continue;
516 s->index[s->index_count++] = entry->key;
517 }
518
519 return 0;
520 }
521
522
523
524
525 static int applesmc_init_smcreg_try(void)
526 {
527 struct applesmc_registers *s = &smcreg;
528 bool left_light_sensor = 0, right_light_sensor = 0;
529 unsigned int count;
530 u8 tmp[1];
531 int ret;
532
533 if (s->init_complete)
534 return 0;
535
536 ret = read_register_count(&count);
537 if (ret)
538 return ret;
539
540 if (s->cache && s->key_count != count) {
541 pr_warn("key count changed from %d to %d\n",
542 s->key_count, count);
543 kfree(s->cache);
544 s->cache = NULL;
545 }
546 s->key_count = count;
547
548 if (!s->cache)
549 s->cache = kcalloc(s->key_count, sizeof(*s->cache), GFP_KERNEL);
550 if (!s->cache)
551 return -ENOMEM;
552
553 ret = applesmc_read_key(FANS_COUNT, tmp, 1);
554 if (ret)
555 return ret;
556 s->fan_count = tmp[0];
557 if (s->fan_count > 10)
558 s->fan_count = 10;
559
560 ret = applesmc_get_lower_bound(&s->temp_begin, "T");
561 if (ret)
562 return ret;
563 ret = applesmc_get_lower_bound(&s->temp_end, "U");
564 if (ret)
565 return ret;
566 s->temp_count = s->temp_end - s->temp_begin;
567
568 ret = applesmc_init_index(s);
569 if (ret)
570 return ret;
571
572 ret = applesmc_has_key(LIGHT_SENSOR_LEFT_KEY, &left_light_sensor);
573 if (ret)
574 return ret;
575 ret = applesmc_has_key(LIGHT_SENSOR_RIGHT_KEY, &right_light_sensor);
576 if (ret)
577 return ret;
578 ret = applesmc_has_key(MOTION_SENSOR_KEY, &s->has_accelerometer);
579 if (ret)
580 return ret;
581 ret = applesmc_has_key(BACKLIGHT_KEY, &s->has_key_backlight);
582 if (ret)
583 return ret;
584
585 s->num_light_sensors = left_light_sensor + right_light_sensor;
586 s->init_complete = true;
587
588 pr_info("key=%d fan=%d temp=%d index=%d acc=%d lux=%d kbd=%d\n",
589 s->key_count, s->fan_count, s->temp_count, s->index_count,
590 s->has_accelerometer,
591 s->num_light_sensors,
592 s->has_key_backlight);
593
594 return 0;
595 }
596
597 static void applesmc_destroy_smcreg(void)
598 {
599 kfree(smcreg.index);
600 smcreg.index = NULL;
601 kfree(smcreg.cache);
602 smcreg.cache = NULL;
603 smcreg.init_complete = false;
604 }
605
606
607
608
609
610
611
612 static int applesmc_init_smcreg(void)
613 {
614 int ms, ret;
615
616 for (ms = 0; ms < INIT_TIMEOUT_MSECS; ms += INIT_WAIT_MSECS) {
617 ret = applesmc_init_smcreg_try();
618 if (!ret) {
619 if (ms)
620 pr_info("init_smcreg() took %d ms\n", ms);
621 return 0;
622 }
623 msleep(INIT_WAIT_MSECS);
624 }
625
626 applesmc_destroy_smcreg();
627
628 return ret;
629 }
630
631
632 static int applesmc_probe(struct platform_device *dev)
633 {
634 int ret;
635
636 ret = applesmc_init_smcreg();
637 if (ret)
638 return ret;
639
640 applesmc_device_init();
641
642 return 0;
643 }
644
645
646 static int applesmc_pm_resume(struct device *dev)
647 {
648 if (smcreg.has_key_backlight)
649 applesmc_write_key(BACKLIGHT_KEY, backlight_state, 2);
650 return 0;
651 }
652
653
654 static int applesmc_pm_restore(struct device *dev)
655 {
656 applesmc_device_init();
657 return applesmc_pm_resume(dev);
658 }
659
660 static const struct dev_pm_ops applesmc_pm_ops = {
661 .resume = applesmc_pm_resume,
662 .restore = applesmc_pm_restore,
663 };
664
665 static struct platform_driver applesmc_driver = {
666 .probe = applesmc_probe,
667 .driver = {
668 .name = "applesmc",
669 .pm = &applesmc_pm_ops,
670 },
671 };
672
673
674
675
676
677 static void applesmc_calibrate(void)
678 {
679 applesmc_read_s16(MOTION_SENSOR_X_KEY, &rest_x);
680 applesmc_read_s16(MOTION_SENSOR_Y_KEY, &rest_y);
681 rest_x = -rest_x;
682 }
683
684 static void applesmc_idev_poll(struct input_polled_dev *dev)
685 {
686 struct input_dev *idev = dev->input;
687 s16 x, y;
688
689 if (applesmc_read_s16(MOTION_SENSOR_X_KEY, &x))
690 return;
691 if (applesmc_read_s16(MOTION_SENSOR_Y_KEY, &y))
692 return;
693
694 x = -x;
695 input_report_abs(idev, ABS_X, x - rest_x);
696 input_report_abs(idev, ABS_Y, y - rest_y);
697 input_sync(idev);
698 }
699
700
701
702 static ssize_t applesmc_name_show(struct device *dev,
703 struct device_attribute *attr, char *buf)
704 {
705 return snprintf(buf, PAGE_SIZE, "applesmc\n");
706 }
707
708 static ssize_t applesmc_position_show(struct device *dev,
709 struct device_attribute *attr, char *buf)
710 {
711 int ret;
712 s16 x, y, z;
713
714 ret = applesmc_read_s16(MOTION_SENSOR_X_KEY, &x);
715 if (ret)
716 goto out;
717 ret = applesmc_read_s16(MOTION_SENSOR_Y_KEY, &y);
718 if (ret)
719 goto out;
720 ret = applesmc_read_s16(MOTION_SENSOR_Z_KEY, &z);
721 if (ret)
722 goto out;
723
724 out:
725 if (ret)
726 return ret;
727 else
728 return snprintf(buf, PAGE_SIZE, "(%d,%d,%d)\n", x, y, z);
729 }
730
731 static ssize_t applesmc_light_show(struct device *dev,
732 struct device_attribute *attr, char *sysfsbuf)
733 {
734 const struct applesmc_entry *entry;
735 static int data_length;
736 int ret;
737 u8 left = 0, right = 0;
738 u8 buffer[10];
739
740 if (!data_length) {
741 entry = applesmc_get_entry_by_key(LIGHT_SENSOR_LEFT_KEY);
742 if (IS_ERR(entry))
743 return PTR_ERR(entry);
744 if (entry->len > 10)
745 return -ENXIO;
746 data_length = entry->len;
747 pr_info("light sensor data length set to %d\n", data_length);
748 }
749
750 ret = applesmc_read_key(LIGHT_SENSOR_LEFT_KEY, buffer, data_length);
751
752 if (data_length == 10) {
753 left = be16_to_cpu(*(__be16 *)(buffer + 6)) >> 2;
754 goto out;
755 }
756 left = buffer[2];
757 if (ret)
758 goto out;
759 ret = applesmc_read_key(LIGHT_SENSOR_RIGHT_KEY, buffer, data_length);
760 right = buffer[2];
761
762 out:
763 if (ret)
764 return ret;
765 else
766 return snprintf(sysfsbuf, PAGE_SIZE, "(%d,%d)\n", left, right);
767 }
768
769
770 static ssize_t applesmc_show_sensor_label(struct device *dev,
771 struct device_attribute *devattr, char *sysfsbuf)
772 {
773 const char *key = smcreg.index[to_index(devattr)];
774
775 return snprintf(sysfsbuf, PAGE_SIZE, "%s\n", key);
776 }
777
778
779 static ssize_t applesmc_show_temperature(struct device *dev,
780 struct device_attribute *devattr, char *sysfsbuf)
781 {
782 const char *key = smcreg.index[to_index(devattr)];
783 int ret;
784 s16 value;
785 int temp;
786
787 ret = applesmc_read_s16(key, &value);
788 if (ret)
789 return ret;
790
791 temp = 250 * (value >> 6);
792
793 return snprintf(sysfsbuf, PAGE_SIZE, "%d\n", temp);
794 }
795
796 static ssize_t applesmc_show_fan_speed(struct device *dev,
797 struct device_attribute *attr, char *sysfsbuf)
798 {
799 int ret;
800 unsigned int speed = 0;
801 char newkey[5];
802 u8 buffer[2];
803
804 scnprintf(newkey, sizeof(newkey), fan_speed_fmt[to_option(attr)],
805 to_index(attr));
806
807 ret = applesmc_read_key(newkey, buffer, 2);
808 speed = ((buffer[0] << 8 | buffer[1]) >> 2);
809
810 if (ret)
811 return ret;
812 else
813 return snprintf(sysfsbuf, PAGE_SIZE, "%u\n", speed);
814 }
815
816 static ssize_t applesmc_store_fan_speed(struct device *dev,
817 struct device_attribute *attr,
818 const char *sysfsbuf, size_t count)
819 {
820 int ret;
821 unsigned long speed;
822 char newkey[5];
823 u8 buffer[2];
824
825 if (kstrtoul(sysfsbuf, 10, &speed) < 0 || speed >= 0x4000)
826 return -EINVAL;
827
828 scnprintf(newkey, sizeof(newkey), fan_speed_fmt[to_option(attr)],
829 to_index(attr));
830
831 buffer[0] = (speed >> 6) & 0xff;
832 buffer[1] = (speed << 2) & 0xff;
833 ret = applesmc_write_key(newkey, buffer, 2);
834
835 if (ret)
836 return ret;
837 else
838 return count;
839 }
840
841 static ssize_t applesmc_show_fan_manual(struct device *dev,
842 struct device_attribute *attr, char *sysfsbuf)
843 {
844 int ret;
845 u16 manual = 0;
846 u8 buffer[2];
847
848 ret = applesmc_read_key(FANS_MANUAL, buffer, 2);
849 manual = ((buffer[0] << 8 | buffer[1]) >> to_index(attr)) & 0x01;
850
851 if (ret)
852 return ret;
853 else
854 return snprintf(sysfsbuf, PAGE_SIZE, "%d\n", manual);
855 }
856
857 static ssize_t applesmc_store_fan_manual(struct device *dev,
858 struct device_attribute *attr,
859 const char *sysfsbuf, size_t count)
860 {
861 int ret;
862 u8 buffer[2];
863 unsigned long input;
864 u16 val;
865
866 if (kstrtoul(sysfsbuf, 10, &input) < 0)
867 return -EINVAL;
868
869 ret = applesmc_read_key(FANS_MANUAL, buffer, 2);
870 val = (buffer[0] << 8 | buffer[1]);
871 if (ret)
872 goto out;
873
874 if (input)
875 val = val | (0x01 << to_index(attr));
876 else
877 val = val & ~(0x01 << to_index(attr));
878
879 buffer[0] = (val >> 8) & 0xFF;
880 buffer[1] = val & 0xFF;
881
882 ret = applesmc_write_key(FANS_MANUAL, buffer, 2);
883
884 out:
885 if (ret)
886 return ret;
887 else
888 return count;
889 }
890
891 static ssize_t applesmc_show_fan_position(struct device *dev,
892 struct device_attribute *attr, char *sysfsbuf)
893 {
894 int ret;
895 char newkey[5];
896 u8 buffer[17];
897
898 scnprintf(newkey, sizeof(newkey), FAN_ID_FMT, to_index(attr));
899
900 ret = applesmc_read_key(newkey, buffer, 16);
901 buffer[16] = 0;
902
903 if (ret)
904 return ret;
905 else
906 return snprintf(sysfsbuf, PAGE_SIZE, "%s\n", buffer+4);
907 }
908
909 static ssize_t applesmc_calibrate_show(struct device *dev,
910 struct device_attribute *attr, char *sysfsbuf)
911 {
912 return snprintf(sysfsbuf, PAGE_SIZE, "(%d,%d)\n", rest_x, rest_y);
913 }
914
915 static ssize_t applesmc_calibrate_store(struct device *dev,
916 struct device_attribute *attr, const char *sysfsbuf, size_t count)
917 {
918 applesmc_calibrate();
919
920 return count;
921 }
922
923 static void applesmc_backlight_set(struct work_struct *work)
924 {
925 applesmc_write_key(BACKLIGHT_KEY, backlight_state, 2);
926 }
927 static DECLARE_WORK(backlight_work, &applesmc_backlight_set);
928
929 static void applesmc_brightness_set(struct led_classdev *led_cdev,
930 enum led_brightness value)
931 {
932 int ret;
933
934 backlight_state[0] = value;
935 ret = queue_work(applesmc_led_wq, &backlight_work);
936
937 if (debug && (!ret))
938 dev_dbg(led_cdev->dev, "work was already on the queue.\n");
939 }
940
941 static ssize_t applesmc_key_count_show(struct device *dev,
942 struct device_attribute *attr, char *sysfsbuf)
943 {
944 int ret;
945 u8 buffer[4];
946 u32 count;
947
948 ret = applesmc_read_key(KEY_COUNT_KEY, buffer, 4);
949 count = ((u32)buffer[0]<<24) + ((u32)buffer[1]<<16) +
950 ((u32)buffer[2]<<8) + buffer[3];
951
952 if (ret)
953 return ret;
954 else
955 return snprintf(sysfsbuf, PAGE_SIZE, "%d\n", count);
956 }
957
958 static ssize_t applesmc_key_at_index_read_show(struct device *dev,
959 struct device_attribute *attr, char *sysfsbuf)
960 {
961 const struct applesmc_entry *entry;
962 int ret;
963
964 entry = applesmc_get_entry_by_index(key_at_index);
965 if (IS_ERR(entry))
966 return PTR_ERR(entry);
967 ret = applesmc_read_entry(entry, sysfsbuf, entry->len);
968 if (ret)
969 return ret;
970
971 return entry->len;
972 }
973
974 static ssize_t applesmc_key_at_index_data_length_show(struct device *dev,
975 struct device_attribute *attr, char *sysfsbuf)
976 {
977 const struct applesmc_entry *entry;
978
979 entry = applesmc_get_entry_by_index(key_at_index);
980 if (IS_ERR(entry))
981 return PTR_ERR(entry);
982
983 return snprintf(sysfsbuf, PAGE_SIZE, "%d\n", entry->len);
984 }
985
986 static ssize_t applesmc_key_at_index_type_show(struct device *dev,
987 struct device_attribute *attr, char *sysfsbuf)
988 {
989 const struct applesmc_entry *entry;
990
991 entry = applesmc_get_entry_by_index(key_at_index);
992 if (IS_ERR(entry))
993 return PTR_ERR(entry);
994
995 return snprintf(sysfsbuf, PAGE_SIZE, "%s\n", entry->type);
996 }
997
998 static ssize_t applesmc_key_at_index_name_show(struct device *dev,
999 struct device_attribute *attr, char *sysfsbuf)
1000 {
1001 const struct applesmc_entry *entry;
1002
1003 entry = applesmc_get_entry_by_index(key_at_index);
1004 if (IS_ERR(entry))
1005 return PTR_ERR(entry);
1006
1007 return snprintf(sysfsbuf, PAGE_SIZE, "%s\n", entry->key);
1008 }
1009
1010 static ssize_t applesmc_key_at_index_show(struct device *dev,
1011 struct device_attribute *attr, char *sysfsbuf)
1012 {
1013 return snprintf(sysfsbuf, PAGE_SIZE, "%d\n", key_at_index);
1014 }
1015
1016 static ssize_t applesmc_key_at_index_store(struct device *dev,
1017 struct device_attribute *attr, const char *sysfsbuf, size_t count)
1018 {
1019 unsigned long newkey;
1020
1021 if (kstrtoul(sysfsbuf, 10, &newkey) < 0
1022 || newkey >= smcreg.key_count)
1023 return -EINVAL;
1024
1025 key_at_index = newkey;
1026 return count;
1027 }
1028
1029 static struct led_classdev applesmc_backlight = {
1030 .name = "smc::kbd_backlight",
1031 .default_trigger = "nand-disk",
1032 .brightness_set = applesmc_brightness_set,
1033 };
1034
1035 static struct applesmc_node_group info_group[] = {
1036 { "name", applesmc_name_show },
1037 { "key_count", applesmc_key_count_show },
1038 { "key_at_index", applesmc_key_at_index_show, applesmc_key_at_index_store },
1039 { "key_at_index_name", applesmc_key_at_index_name_show },
1040 { "key_at_index_type", applesmc_key_at_index_type_show },
1041 { "key_at_index_data_length", applesmc_key_at_index_data_length_show },
1042 { "key_at_index_data", applesmc_key_at_index_read_show },
1043 { }
1044 };
1045
1046 static struct applesmc_node_group accelerometer_group[] = {
1047 { "position", applesmc_position_show },
1048 { "calibrate", applesmc_calibrate_show, applesmc_calibrate_store },
1049 { }
1050 };
1051
1052 static struct applesmc_node_group light_sensor_group[] = {
1053 { "light", applesmc_light_show },
1054 { }
1055 };
1056
1057 static struct applesmc_node_group fan_group[] = {
1058 { "fan%d_label", applesmc_show_fan_position },
1059 { "fan%d_input", applesmc_show_fan_speed, NULL, 0 },
1060 { "fan%d_min", applesmc_show_fan_speed, applesmc_store_fan_speed, 1 },
1061 { "fan%d_max", applesmc_show_fan_speed, NULL, 2 },
1062 { "fan%d_safe", applesmc_show_fan_speed, NULL, 3 },
1063 { "fan%d_output", applesmc_show_fan_speed, applesmc_store_fan_speed, 4 },
1064 { "fan%d_manual", applesmc_show_fan_manual, applesmc_store_fan_manual },
1065 { }
1066 };
1067
1068 static struct applesmc_node_group temp_group[] = {
1069 { "temp%d_label", applesmc_show_sensor_label },
1070 { "temp%d_input", applesmc_show_temperature },
1071 { }
1072 };
1073
1074
1075
1076
1077
1078
1079 static void applesmc_destroy_nodes(struct applesmc_node_group *groups)
1080 {
1081 struct applesmc_node_group *grp;
1082 struct applesmc_dev_attr *node;
1083
1084 for (grp = groups; grp->nodes; grp++) {
1085 for (node = grp->nodes; node->sda.dev_attr.attr.name; node++)
1086 sysfs_remove_file(&pdev->dev.kobj,
1087 &node->sda.dev_attr.attr);
1088 kfree(grp->nodes);
1089 grp->nodes = NULL;
1090 }
1091 }
1092
1093
1094
1095
1096 static int applesmc_create_nodes(struct applesmc_node_group *groups, int num)
1097 {
1098 struct applesmc_node_group *grp;
1099 struct applesmc_dev_attr *node;
1100 struct attribute *attr;
1101 int ret, i;
1102
1103 for (grp = groups; grp->format; grp++) {
1104 grp->nodes = kcalloc(num + 1, sizeof(*node), GFP_KERNEL);
1105 if (!grp->nodes) {
1106 ret = -ENOMEM;
1107 goto out;
1108 }
1109 for (i = 0; i < num; i++) {
1110 node = &grp->nodes[i];
1111 scnprintf(node->name, sizeof(node->name), grp->format,
1112 i + 1);
1113 node->sda.index = (grp->option << 16) | (i & 0xffff);
1114 node->sda.dev_attr.show = grp->show;
1115 node->sda.dev_attr.store = grp->store;
1116 attr = &node->sda.dev_attr.attr;
1117 sysfs_attr_init(attr);
1118 attr->name = node->name;
1119 attr->mode = 0444 | (grp->store ? 0200 : 0);
1120 ret = sysfs_create_file(&pdev->dev.kobj, attr);
1121 if (ret) {
1122 attr->name = NULL;
1123 goto out;
1124 }
1125 }
1126 }
1127
1128 return 0;
1129 out:
1130 applesmc_destroy_nodes(groups);
1131 return ret;
1132 }
1133
1134
1135 static int applesmc_create_accelerometer(void)
1136 {
1137 struct input_dev *idev;
1138 int ret;
1139
1140 if (!smcreg.has_accelerometer)
1141 return 0;
1142
1143 ret = applesmc_create_nodes(accelerometer_group, 1);
1144 if (ret)
1145 goto out;
1146
1147 applesmc_idev = input_allocate_polled_device();
1148 if (!applesmc_idev) {
1149 ret = -ENOMEM;
1150 goto out_sysfs;
1151 }
1152
1153 applesmc_idev->poll = applesmc_idev_poll;
1154 applesmc_idev->poll_interval = APPLESMC_POLL_INTERVAL;
1155
1156
1157 applesmc_calibrate();
1158
1159
1160 idev = applesmc_idev->input;
1161 idev->name = "applesmc";
1162 idev->id.bustype = BUS_HOST;
1163 idev->dev.parent = &pdev->dev;
1164 idev->evbit[0] = BIT_MASK(EV_ABS);
1165 input_set_abs_params(idev, ABS_X,
1166 -256, 256, APPLESMC_INPUT_FUZZ, APPLESMC_INPUT_FLAT);
1167 input_set_abs_params(idev, ABS_Y,
1168 -256, 256, APPLESMC_INPUT_FUZZ, APPLESMC_INPUT_FLAT);
1169
1170 ret = input_register_polled_device(applesmc_idev);
1171 if (ret)
1172 goto out_idev;
1173
1174 return 0;
1175
1176 out_idev:
1177 input_free_polled_device(applesmc_idev);
1178
1179 out_sysfs:
1180 applesmc_destroy_nodes(accelerometer_group);
1181
1182 out:
1183 pr_warn("driver init failed (ret=%d)!\n", ret);
1184 return ret;
1185 }
1186
1187
1188 static void applesmc_release_accelerometer(void)
1189 {
1190 if (!smcreg.has_accelerometer)
1191 return;
1192 input_unregister_polled_device(applesmc_idev);
1193 input_free_polled_device(applesmc_idev);
1194 applesmc_destroy_nodes(accelerometer_group);
1195 }
1196
1197 static int applesmc_create_light_sensor(void)
1198 {
1199 if (!smcreg.num_light_sensors)
1200 return 0;
1201 return applesmc_create_nodes(light_sensor_group, 1);
1202 }
1203
1204 static void applesmc_release_light_sensor(void)
1205 {
1206 if (!smcreg.num_light_sensors)
1207 return;
1208 applesmc_destroy_nodes(light_sensor_group);
1209 }
1210
1211 static int applesmc_create_key_backlight(void)
1212 {
1213 if (!smcreg.has_key_backlight)
1214 return 0;
1215 applesmc_led_wq = create_singlethread_workqueue("applesmc-led");
1216 if (!applesmc_led_wq)
1217 return -ENOMEM;
1218 return led_classdev_register(&pdev->dev, &applesmc_backlight);
1219 }
1220
1221 static void applesmc_release_key_backlight(void)
1222 {
1223 if (!smcreg.has_key_backlight)
1224 return;
1225 led_classdev_unregister(&applesmc_backlight);
1226 destroy_workqueue(applesmc_led_wq);
1227 }
1228
1229 static int applesmc_dmi_match(const struct dmi_system_id *id)
1230 {
1231 return 1;
1232 }
1233
1234
1235
1236
1237
1238 static const struct dmi_system_id applesmc_whitelist[] __initconst = {
1239 { applesmc_dmi_match, "Apple MacBook Air", {
1240 DMI_MATCH(DMI_BOARD_VENDOR, "Apple"),
1241 DMI_MATCH(DMI_PRODUCT_NAME, "MacBookAir") },
1242 },
1243 { applesmc_dmi_match, "Apple MacBook Pro", {
1244 DMI_MATCH(DMI_BOARD_VENDOR, "Apple"),
1245 DMI_MATCH(DMI_PRODUCT_NAME, "MacBookPro") },
1246 },
1247 { applesmc_dmi_match, "Apple MacBook", {
1248 DMI_MATCH(DMI_BOARD_VENDOR, "Apple"),
1249 DMI_MATCH(DMI_PRODUCT_NAME, "MacBook") },
1250 },
1251 { applesmc_dmi_match, "Apple Macmini", {
1252 DMI_MATCH(DMI_BOARD_VENDOR, "Apple"),
1253 DMI_MATCH(DMI_PRODUCT_NAME, "Macmini") },
1254 },
1255 { applesmc_dmi_match, "Apple MacPro", {
1256 DMI_MATCH(DMI_BOARD_VENDOR, "Apple"),
1257 DMI_MATCH(DMI_PRODUCT_NAME, "MacPro") },
1258 },
1259 { applesmc_dmi_match, "Apple iMac", {
1260 DMI_MATCH(DMI_BOARD_VENDOR, "Apple"),
1261 DMI_MATCH(DMI_PRODUCT_NAME, "iMac") },
1262 },
1263 { .ident = NULL }
1264 };
1265
1266 static int __init applesmc_init(void)
1267 {
1268 int ret;
1269
1270 if (!dmi_check_system(applesmc_whitelist)) {
1271 pr_warn("supported laptop not found!\n");
1272 ret = -ENODEV;
1273 goto out;
1274 }
1275
1276 if (!request_region(APPLESMC_DATA_PORT, APPLESMC_NR_PORTS,
1277 "applesmc")) {
1278 ret = -ENXIO;
1279 goto out;
1280 }
1281
1282 ret = platform_driver_register(&applesmc_driver);
1283 if (ret)
1284 goto out_region;
1285
1286 pdev = platform_device_register_simple("applesmc", APPLESMC_DATA_PORT,
1287 NULL, 0);
1288 if (IS_ERR(pdev)) {
1289 ret = PTR_ERR(pdev);
1290 goto out_driver;
1291 }
1292
1293
1294 ret = applesmc_init_smcreg();
1295 if (ret)
1296 goto out_device;
1297
1298 ret = applesmc_create_nodes(info_group, 1);
1299 if (ret)
1300 goto out_smcreg;
1301
1302 ret = applesmc_create_nodes(fan_group, smcreg.fan_count);
1303 if (ret)
1304 goto out_info;
1305
1306 ret = applesmc_create_nodes(temp_group, smcreg.index_count);
1307 if (ret)
1308 goto out_fans;
1309
1310 ret = applesmc_create_accelerometer();
1311 if (ret)
1312 goto out_temperature;
1313
1314 ret = applesmc_create_light_sensor();
1315 if (ret)
1316 goto out_accelerometer;
1317
1318 ret = applesmc_create_key_backlight();
1319 if (ret)
1320 goto out_light_sysfs;
1321
1322 hwmon_dev = hwmon_device_register(&pdev->dev);
1323 if (IS_ERR(hwmon_dev)) {
1324 ret = PTR_ERR(hwmon_dev);
1325 goto out_light_ledclass;
1326 }
1327
1328 return 0;
1329
1330 out_light_ledclass:
1331 applesmc_release_key_backlight();
1332 out_light_sysfs:
1333 applesmc_release_light_sensor();
1334 out_accelerometer:
1335 applesmc_release_accelerometer();
1336 out_temperature:
1337 applesmc_destroy_nodes(temp_group);
1338 out_fans:
1339 applesmc_destroy_nodes(fan_group);
1340 out_info:
1341 applesmc_destroy_nodes(info_group);
1342 out_smcreg:
1343 applesmc_destroy_smcreg();
1344 out_device:
1345 platform_device_unregister(pdev);
1346 out_driver:
1347 platform_driver_unregister(&applesmc_driver);
1348 out_region:
1349 release_region(APPLESMC_DATA_PORT, APPLESMC_NR_PORTS);
1350 out:
1351 pr_warn("driver init failed (ret=%d)!\n", ret);
1352 return ret;
1353 }
1354
1355 static void __exit applesmc_exit(void)
1356 {
1357 hwmon_device_unregister(hwmon_dev);
1358 applesmc_release_key_backlight();
1359 applesmc_release_light_sensor();
1360 applesmc_release_accelerometer();
1361 applesmc_destroy_nodes(temp_group);
1362 applesmc_destroy_nodes(fan_group);
1363 applesmc_destroy_nodes(info_group);
1364 applesmc_destroy_smcreg();
1365 platform_device_unregister(pdev);
1366 platform_driver_unregister(&applesmc_driver);
1367 release_region(APPLESMC_DATA_PORT, APPLESMC_NR_PORTS);
1368 }
1369
1370 module_init(applesmc_init);
1371 module_exit(applesmc_exit);
1372
1373 MODULE_AUTHOR("Nicolas Boichat");
1374 MODULE_DESCRIPTION("Apple SMC");
1375 MODULE_LICENSE("GPL v2");
1376 MODULE_DEVICE_TABLE(dmi, applesmc_whitelist);