1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
18
19
20
21
22
23
24
25
26
27
28
29
30#define pr_fmt(fmt) KBUILD_MODNAME ": " fmt
31
32#include <linux/delay.h>
33#include <linux/platform_device.h>
34#include <linux/input-polldev.h>
35#include <linux/kernel.h>
36#include <linux/slab.h>
37#include <linux/module.h>
38#include <linux/timer.h>
39#include <linux/dmi.h>
40#include <linux/mutex.h>
41#include <linux/hwmon-sysfs.h>
42#include <linux/io.h>
43#include <linux/leds.h>
44#include <linux/hwmon.h>
45#include <linux/workqueue.h>
46#include <linux/err.h>
47
48
49#define APPLESMC_DATA_PORT 0x300
50
51#define APPLESMC_CMD_PORT 0x304
52
53#define APPLESMC_NR_PORTS 32
54
55#define APPLESMC_MAX_DATA_LENGTH 32
56
57
58#define APPLESMC_MIN_WAIT 0x0010
59#define APPLESMC_RETRY_WAIT 0x0100
60#define APPLESMC_MAX_WAIT 0x20000
61
62#define APPLESMC_READ_CMD 0x10
63#define APPLESMC_WRITE_CMD 0x11
64#define APPLESMC_GET_KEY_BY_INDEX_CMD 0x12
65#define APPLESMC_GET_KEY_TYPE_CMD 0x13
66
67#define KEY_COUNT_KEY "#KEY"
68
69#define LIGHT_SENSOR_LEFT_KEY "ALV0"
70#define LIGHT_SENSOR_RIGHT_KEY "ALV1"
71#define BACKLIGHT_KEY "LKSB"
72
73#define CLAMSHELL_KEY "MSLD"
74
75#define MOTION_SENSOR_X_KEY "MO_X"
76#define MOTION_SENSOR_Y_KEY "MO_Y"
77#define MOTION_SENSOR_Z_KEY "MO_Z"
78#define MOTION_SENSOR_KEY "MOCN"
79
80#define FANS_COUNT "FNum"
81#define FANS_MANUAL "FS! "
82#define FAN_ID_FMT "F%dID"
83
84#define TEMP_SENSOR_TYPE "sp78"
85
86
87static const char *const fan_speed_fmt[] = {
88 "F%dAc",
89 "F%dMn",
90 "F%dMx",
91 "F%dSf",
92 "F%dTg",
93};
94
95#define INIT_TIMEOUT_MSECS 5000
96#define INIT_WAIT_MSECS 50
97
98#define APPLESMC_POLL_INTERVAL 50
99#define APPLESMC_INPUT_FUZZ 4
100#define APPLESMC_INPUT_FLAT 4
101
102#define to_index(attr) (to_sensor_dev_attr(attr)->index & 0xffff)
103#define to_option(attr) (to_sensor_dev_attr(attr)->index >> 16)
104
105
106struct applesmc_dev_attr {
107 struct sensor_device_attribute sda;
108 char name[32];
109};
110
111
112struct applesmc_node_group {
113 char *format;
114 void *show;
115 void *store;
116 int option;
117 struct applesmc_dev_attr *nodes;
118};
119
120
121struct applesmc_entry {
122 char key[5];
123 u8 valid;
124 u8 len;
125 char type[5];
126 u8 flags;
127};
128
129
130static struct applesmc_registers {
131 struct mutex mutex;
132 unsigned int key_count;
133 unsigned int fan_count;
134 unsigned int temp_count;
135 unsigned int temp_begin;
136 unsigned int temp_end;
137 unsigned int index_count;
138 int num_light_sensors;
139 bool has_accelerometer;
140 bool has_key_backlight;
141 bool init_complete;
142 struct applesmc_entry *cache;
143 const char **index;
144} smcreg = {
145 .mutex = __MUTEX_INITIALIZER(smcreg.mutex),
146};
147
148static const int debug;
149static struct platform_device *pdev;
150static s16 rest_x;
151static s16 rest_y;
152static u8 backlight_state[2];
153
154static struct device *hwmon_dev;
155static struct input_polled_dev *applesmc_idev;
156
157
158
159
160
161static unsigned int key_at_index;
162
163static struct workqueue_struct *applesmc_led_wq;
164
165
166
167
168
169static int wait_read(void)
170{
171 u8 status;
172 int us;
173 for (us = APPLESMC_MIN_WAIT; us < APPLESMC_MAX_WAIT; us <<= 1) {
174 udelay(us);
175 status = inb(APPLESMC_CMD_PORT);
176
177 if (status & 0x01)
178 return 0;
179 }
180
181 pr_warn("wait_read() fail: 0x%02x\n", status);
182 return -EIO;
183}
184
185
186
187
188
189static int send_byte(u8 cmd, u16 port)
190{
191 u8 status;
192 int us;
193
194 outb(cmd, port);
195 for (us = APPLESMC_MIN_WAIT; us < APPLESMC_MAX_WAIT; us <<= 1) {
196 udelay(us);
197 status = inb(APPLESMC_CMD_PORT);
198
199 if (status & 0x02)
200 continue;
201
202 if (status & 0x04)
203 return 0;
204
205 if (us << 1 == APPLESMC_MAX_WAIT)
206 break;
207
208 udelay(APPLESMC_RETRY_WAIT);
209 outb(cmd, port);
210 }
211
212 pr_warn("send_byte(0x%02x, 0x%04x) fail: 0x%02x\n", cmd, port, status);
213 return -EIO;
214}
215
216static int send_command(u8 cmd)
217{
218 return send_byte(cmd, APPLESMC_CMD_PORT);
219}
220
221static int send_argument(const char *key)
222{
223 int i;
224
225 for (i = 0; i < 4; i++)
226 if (send_byte(key[i], APPLESMC_DATA_PORT))
227 return -EIO;
228 return 0;
229}
230
231static int read_smc(u8 cmd, const char *key, u8 *buffer, u8 len)
232{
233 int i;
234
235 if (send_command(cmd) || send_argument(key)) {
236 pr_warn("%.4s: read arg fail\n", key);
237 return -EIO;
238 }
239
240 if (send_byte(len, APPLESMC_DATA_PORT)) {
241 pr_warn("%.4s: read len fail\n", key);
242 return -EIO;
243 }
244
245 for (i = 0; i < len; i++) {
246 if (wait_read()) {
247 pr_warn("%.4s: read data[%d] fail\n", key, i);
248 return -EIO;
249 }
250 buffer[i] = inb(APPLESMC_DATA_PORT);
251 }
252
253 return 0;
254}
255
256static int write_smc(u8 cmd, const char *key, const u8 *buffer, u8 len)
257{
258 int i;
259
260 if (send_command(cmd) || send_argument(key)) {
261 pr_warn("%s: write arg fail\n", key);
262 return -EIO;
263 }
264
265 if (send_byte(len, APPLESMC_DATA_PORT)) {
266 pr_warn("%.4s: write len fail\n", key);
267 return -EIO;
268 }
269
270 for (i = 0; i < len; i++) {
271 if (send_byte(buffer[i], APPLESMC_DATA_PORT)) {
272 pr_warn("%s: write data fail\n", key);
273 return -EIO;
274 }
275 }
276
277 return 0;
278}
279
280static int read_register_count(unsigned int *count)
281{
282 __be32 be;
283 int ret;
284
285 ret = read_smc(APPLESMC_READ_CMD, KEY_COUNT_KEY, (u8 *)&be, 4);
286 if (ret)
287 return ret;
288
289 *count = be32_to_cpu(be);
290 return 0;
291}
292
293
294
295
296
297
298
299
300static int applesmc_read_entry(const struct applesmc_entry *entry,
301 u8 *buf, u8 len)
302{
303 int ret;
304
305 if (entry->len != len)
306 return -EINVAL;
307 mutex_lock(&smcreg.mutex);
308 ret = read_smc(APPLESMC_READ_CMD, entry->key, buf, len);
309 mutex_unlock(&smcreg.mutex);
310
311 return ret;
312}
313
314static int applesmc_write_entry(const struct applesmc_entry *entry,
315 const u8 *buf, u8 len)
316{
317 int ret;
318
319 if (entry->len != len)
320 return -EINVAL;
321 mutex_lock(&smcreg.mutex);
322 ret = write_smc(APPLESMC_WRITE_CMD, entry->key, buf, len);
323 mutex_unlock(&smcreg.mutex);
324 return ret;
325}
326
327static const struct applesmc_entry *applesmc_get_entry_by_index(int index)
328{
329 struct applesmc_entry *cache = &smcreg.cache[index];
330 u8 key[4], info[6];
331 __be32 be;
332 int ret = 0;
333
334 if (cache->valid)
335 return cache;
336
337 mutex_lock(&smcreg.mutex);
338
339 if (cache->valid)
340 goto out;
341 be = cpu_to_be32(index);
342 ret = read_smc(APPLESMC_GET_KEY_BY_INDEX_CMD, (u8 *)&be, key, 4);
343 if (ret)
344 goto out;
345 ret = read_smc(APPLESMC_GET_KEY_TYPE_CMD, key, info, 6);
346 if (ret)
347 goto out;
348
349 memcpy(cache->key, key, 4);
350 cache->len = info[0];
351 memcpy(cache->type, &info[1], 4);
352 cache->flags = info[5];
353 cache->valid = 1;
354
355out:
356 mutex_unlock(&smcreg.mutex);
357 if (ret)
358 return ERR_PTR(ret);
359 return cache;
360}
361
362static int applesmc_get_lower_bound(unsigned int *lo, const char *key)
363{
364 int begin = 0, end = smcreg.key_count;
365 const struct applesmc_entry *entry;
366
367 while (begin != end) {
368 int middle = begin + (end - begin) / 2;
369 entry = applesmc_get_entry_by_index(middle);
370 if (IS_ERR(entry)) {
371 *lo = 0;
372 return PTR_ERR(entry);
373 }
374 if (strcmp(entry->key, key) < 0)
375 begin = middle + 1;
376 else
377 end = middle;
378 }
379
380 *lo = begin;
381 return 0;
382}
383
384static int applesmc_get_upper_bound(unsigned int *hi, const char *key)
385{
386 int begin = 0, end = smcreg.key_count;
387 const struct applesmc_entry *entry;
388
389 while (begin != end) {
390 int middle = begin + (end - begin) / 2;
391 entry = applesmc_get_entry_by_index(middle);
392 if (IS_ERR(entry)) {
393 *hi = smcreg.key_count;
394 return PTR_ERR(entry);
395 }
396 if (strcmp(key, entry->key) < 0)
397 end = middle;
398 else
399 begin = middle + 1;
400 }
401
402 *hi = begin;
403 return 0;
404}
405
406static const struct applesmc_entry *applesmc_get_entry_by_key(const char *key)
407{
408 int begin, end;
409 int ret;
410
411 ret = applesmc_get_lower_bound(&begin, key);
412 if (ret)
413 return ERR_PTR(ret);
414 ret = applesmc_get_upper_bound(&end, key);
415 if (ret)
416 return ERR_PTR(ret);
417 if (end - begin != 1)
418 return ERR_PTR(-EINVAL);
419
420 return applesmc_get_entry_by_index(begin);
421}
422
423static int applesmc_read_key(const char *key, u8 *buffer, u8 len)
424{
425 const struct applesmc_entry *entry;
426
427 entry = applesmc_get_entry_by_key(key);
428 if (IS_ERR(entry))
429 return PTR_ERR(entry);
430
431 return applesmc_read_entry(entry, buffer, len);
432}
433
434static int applesmc_write_key(const char *key, const u8 *buffer, u8 len)
435{
436 const struct applesmc_entry *entry;
437
438 entry = applesmc_get_entry_by_key(key);
439 if (IS_ERR(entry))
440 return PTR_ERR(entry);
441
442 return applesmc_write_entry(entry, buffer, len);
443}
444
445static int applesmc_has_key(const char *key, bool *value)
446{
447 const struct applesmc_entry *entry;
448
449 entry = applesmc_get_entry_by_key(key);
450 if (IS_ERR(entry) && PTR_ERR(entry) != -EINVAL)
451 return PTR_ERR(entry);
452
453 *value = !IS_ERR(entry);
454 return 0;
455}
456
457
458
459
460static int applesmc_read_s16(const char *key, s16 *value)
461{
462 u8 buffer[2];
463 int ret;
464
465 ret = applesmc_read_key(key, buffer, 2);
466 if (ret)
467 return ret;
468
469 *value = ((s16)buffer[0] << 8) | buffer[1];
470 return 0;
471}
472
473
474
475
476static void applesmc_device_init(void)
477{
478 int total;
479 u8 buffer[2];
480
481 if (!smcreg.has_accelerometer)
482 return;
483
484 for (total = INIT_TIMEOUT_MSECS; total > 0; total -= INIT_WAIT_MSECS) {
485 if (!applesmc_read_key(MOTION_SENSOR_KEY, buffer, 2) &&
486 (buffer[0] != 0x00 || buffer[1] != 0x00))
487 return;
488 buffer[0] = 0xe0;
489 buffer[1] = 0x00;
490 applesmc_write_key(MOTION_SENSOR_KEY, buffer, 2);
491 msleep(INIT_WAIT_MSECS);
492 }
493
494 pr_warn("failed to init the device\n");
495}
496
497static int applesmc_init_index(struct applesmc_registers *s)
498{
499 const struct applesmc_entry *entry;
500 unsigned int i;
501
502 if (s->index)
503 return 0;
504
505 s->index = kcalloc(s->temp_count, sizeof(s->index[0]), GFP_KERNEL);
506 if (!s->index)
507 return -ENOMEM;
508
509 for (i = s->temp_begin; i < s->temp_end; i++) {
510 entry = applesmc_get_entry_by_index(i);
511 if (IS_ERR(entry))
512 continue;
513 if (strcmp(entry->type, TEMP_SENSOR_TYPE))
514 continue;
515 s->index[s->index_count++] = entry->key;
516 }
517
518 return 0;
519}
520
521
522
523
524static int applesmc_init_smcreg_try(void)
525{
526 struct applesmc_registers *s = &smcreg;
527 bool left_light_sensor, right_light_sensor;
528 u8 tmp[1];
529 int ret;
530
531 if (s->init_complete)
532 return 0;
533
534 ret = read_register_count(&s->key_count);
535 if (ret)
536 return ret;
537
538 if (!s->cache)
539 s->cache = kcalloc(s->key_count, sizeof(*s->cache), GFP_KERNEL);
540 if (!s->cache)
541 return -ENOMEM;
542
543 ret = applesmc_read_key(FANS_COUNT, tmp, 1);
544 if (ret)
545 return ret;
546 s->fan_count = tmp[0];
547
548 ret = applesmc_get_lower_bound(&s->temp_begin, "T");
549 if (ret)
550 return ret;
551 ret = applesmc_get_lower_bound(&s->temp_end, "U");
552 if (ret)
553 return ret;
554 s->temp_count = s->temp_end - s->temp_begin;
555
556 ret = applesmc_init_index(s);
557 if (ret)
558 return ret;
559
560 ret = applesmc_has_key(LIGHT_SENSOR_LEFT_KEY, &left_light_sensor);
561 if (ret)
562 return ret;
563 ret = applesmc_has_key(LIGHT_SENSOR_RIGHT_KEY, &right_light_sensor);
564 if (ret)
565 return ret;
566 ret = applesmc_has_key(MOTION_SENSOR_KEY, &s->has_accelerometer);
567 if (ret)
568 return ret;
569 ret = applesmc_has_key(BACKLIGHT_KEY, &s->has_key_backlight);
570 if (ret)
571 return ret;
572
573 s->num_light_sensors = left_light_sensor + right_light_sensor;
574 s->init_complete = true;
575
576 pr_info("key=%d fan=%d temp=%d index=%d acc=%d lux=%d kbd=%d\n",
577 s->key_count, s->fan_count, s->temp_count, s->index_count,
578 s->has_accelerometer,
579 s->num_light_sensors,
580 s->has_key_backlight);
581
582 return 0;
583}
584
585static void applesmc_destroy_smcreg(void)
586{
587 kfree(smcreg.index);
588 smcreg.index = NULL;
589 kfree(smcreg.cache);
590 smcreg.cache = NULL;
591 smcreg.init_complete = false;
592}
593
594
595
596
597
598
599
600static int applesmc_init_smcreg(void)
601{
602 int ms, ret;
603
604 for (ms = 0; ms < INIT_TIMEOUT_MSECS; ms += INIT_WAIT_MSECS) {
605 ret = applesmc_init_smcreg_try();
606 if (!ret) {
607 if (ms)
608 pr_info("init_smcreg() took %d ms\n", ms);
609 return 0;
610 }
611 msleep(INIT_WAIT_MSECS);
612 }
613
614 applesmc_destroy_smcreg();
615
616 return ret;
617}
618
619
620static int applesmc_probe(struct platform_device *dev)
621{
622 int ret;
623
624 ret = applesmc_init_smcreg();
625 if (ret)
626 return ret;
627
628 applesmc_device_init();
629
630 return 0;
631}
632
633
634static int applesmc_pm_resume(struct device *dev)
635{
636 if (smcreg.has_key_backlight)
637 applesmc_write_key(BACKLIGHT_KEY, backlight_state, 2);
638 return 0;
639}
640
641
642static int applesmc_pm_restore(struct device *dev)
643{
644 applesmc_device_init();
645 return applesmc_pm_resume(dev);
646}
647
648static const struct dev_pm_ops applesmc_pm_ops = {
649 .resume = applesmc_pm_resume,
650 .restore = applesmc_pm_restore,
651};
652
653static struct platform_driver applesmc_driver = {
654 .probe = applesmc_probe,
655 .driver = {
656 .name = "applesmc",
657 .owner = THIS_MODULE,
658 .pm = &applesmc_pm_ops,
659 },
660};
661
662
663
664
665
666static void applesmc_calibrate(void)
667{
668 applesmc_read_s16(MOTION_SENSOR_X_KEY, &rest_x);
669 applesmc_read_s16(MOTION_SENSOR_Y_KEY, &rest_y);
670 rest_x = -rest_x;
671}
672
673static void applesmc_idev_poll(struct input_polled_dev *dev)
674{
675 struct input_dev *idev = dev->input;
676 s16 x, y;
677
678 if (applesmc_read_s16(MOTION_SENSOR_X_KEY, &x))
679 return;
680 if (applesmc_read_s16(MOTION_SENSOR_Y_KEY, &y))
681 return;
682
683 x = -x;
684 input_report_abs(idev, ABS_X, x - rest_x);
685 input_report_abs(idev, ABS_Y, y - rest_y);
686 input_sync(idev);
687}
688
689
690
691static ssize_t applesmc_name_show(struct device *dev,
692 struct device_attribute *attr, char *buf)
693{
694 return snprintf(buf, PAGE_SIZE, "applesmc\n");
695}
696
697static ssize_t applesmc_position_show(struct device *dev,
698 struct device_attribute *attr, char *buf)
699{
700 int ret;
701 s16 x, y, z;
702
703 ret = applesmc_read_s16(MOTION_SENSOR_X_KEY, &x);
704 if (ret)
705 goto out;
706 ret = applesmc_read_s16(MOTION_SENSOR_Y_KEY, &y);
707 if (ret)
708 goto out;
709 ret = applesmc_read_s16(MOTION_SENSOR_Z_KEY, &z);
710 if (ret)
711 goto out;
712
713out:
714 if (ret)
715 return ret;
716 else
717 return snprintf(buf, PAGE_SIZE, "(%d,%d,%d)\n", x, y, z);
718}
719
720static ssize_t applesmc_light_show(struct device *dev,
721 struct device_attribute *attr, char *sysfsbuf)
722{
723 const struct applesmc_entry *entry;
724 static int data_length;
725 int ret;
726 u8 left = 0, right = 0;
727 u8 buffer[10];
728
729 if (!data_length) {
730 entry = applesmc_get_entry_by_key(LIGHT_SENSOR_LEFT_KEY);
731 if (IS_ERR(entry))
732 return PTR_ERR(entry);
733 if (entry->len > 10)
734 return -ENXIO;
735 data_length = entry->len;
736 pr_info("light sensor data length set to %d\n", data_length);
737 }
738
739 ret = applesmc_read_key(LIGHT_SENSOR_LEFT_KEY, buffer, data_length);
740
741 if (data_length == 10) {
742 left = be16_to_cpu(*(__be16 *)(buffer + 6)) >> 2;
743 goto out;
744 }
745 left = buffer[2];
746 if (ret)
747 goto out;
748 ret = applesmc_read_key(LIGHT_SENSOR_RIGHT_KEY, buffer, data_length);
749 right = buffer[2];
750
751out:
752 if (ret)
753 return ret;
754 else
755 return snprintf(sysfsbuf, PAGE_SIZE, "(%d,%d)\n", left, right);
756}
757
758
759static ssize_t applesmc_show_sensor_label(struct device *dev,
760 struct device_attribute *devattr, char *sysfsbuf)
761{
762 const char *key = smcreg.index[to_index(devattr)];
763
764 return snprintf(sysfsbuf, PAGE_SIZE, "%s\n", key);
765}
766
767
768static ssize_t applesmc_show_temperature(struct device *dev,
769 struct device_attribute *devattr, char *sysfsbuf)
770{
771 const char *key = smcreg.index[to_index(devattr)];
772 int ret;
773 s16 value;
774 int temp;
775
776 ret = applesmc_read_s16(key, &value);
777 if (ret)
778 return ret;
779
780 temp = 250 * (value >> 6);
781
782 return snprintf(sysfsbuf, PAGE_SIZE, "%d\n", temp);
783}
784
785static ssize_t applesmc_show_fan_speed(struct device *dev,
786 struct device_attribute *attr, char *sysfsbuf)
787{
788 int ret;
789 unsigned int speed = 0;
790 char newkey[5];
791 u8 buffer[2];
792
793 sprintf(newkey, fan_speed_fmt[to_option(attr)], to_index(attr));
794
795 ret = applesmc_read_key(newkey, buffer, 2);
796 speed = ((buffer[0] << 8 | buffer[1]) >> 2);
797
798 if (ret)
799 return ret;
800 else
801 return snprintf(sysfsbuf, PAGE_SIZE, "%u\n", speed);
802}
803
804static ssize_t applesmc_store_fan_speed(struct device *dev,
805 struct device_attribute *attr,
806 const char *sysfsbuf, size_t count)
807{
808 int ret;
809 unsigned long speed;
810 char newkey[5];
811 u8 buffer[2];
812
813 if (kstrtoul(sysfsbuf, 10, &speed) < 0 || speed >= 0x4000)
814 return -EINVAL;
815
816 sprintf(newkey, fan_speed_fmt[to_option(attr)], to_index(attr));
817
818 buffer[0] = (speed >> 6) & 0xff;
819 buffer[1] = (speed << 2) & 0xff;
820 ret = applesmc_write_key(newkey, buffer, 2);
821
822 if (ret)
823 return ret;
824 else
825 return count;
826}
827
828static ssize_t applesmc_show_fan_manual(struct device *dev,
829 struct device_attribute *attr, char *sysfsbuf)
830{
831 int ret;
832 u16 manual = 0;
833 u8 buffer[2];
834
835 ret = applesmc_read_key(FANS_MANUAL, buffer, 2);
836 manual = ((buffer[0] << 8 | buffer[1]) >> to_index(attr)) & 0x01;
837
838 if (ret)
839 return ret;
840 else
841 return snprintf(sysfsbuf, PAGE_SIZE, "%d\n", manual);
842}
843
844static ssize_t applesmc_store_fan_manual(struct device *dev,
845 struct device_attribute *attr,
846 const char *sysfsbuf, size_t count)
847{
848 int ret;
849 u8 buffer[2];
850 unsigned long input;
851 u16 val;
852
853 if (kstrtoul(sysfsbuf, 10, &input) < 0)
854 return -EINVAL;
855
856 ret = applesmc_read_key(FANS_MANUAL, buffer, 2);
857 val = (buffer[0] << 8 | buffer[1]);
858 if (ret)
859 goto out;
860
861 if (input)
862 val = val | (0x01 << to_index(attr));
863 else
864 val = val & ~(0x01 << to_index(attr));
865
866 buffer[0] = (val >> 8) & 0xFF;
867 buffer[1] = val & 0xFF;
868
869 ret = applesmc_write_key(FANS_MANUAL, buffer, 2);
870
871out:
872 if (ret)
873 return ret;
874 else
875 return count;
876}
877
878static ssize_t applesmc_show_fan_position(struct device *dev,
879 struct device_attribute *attr, char *sysfsbuf)
880{
881 int ret;
882 char newkey[5];
883 u8 buffer[17];
884
885 sprintf(newkey, FAN_ID_FMT, to_index(attr));
886
887 ret = applesmc_read_key(newkey, buffer, 16);
888 buffer[16] = 0;
889
890 if (ret)
891 return ret;
892 else
893 return snprintf(sysfsbuf, PAGE_SIZE, "%s\n", buffer+4);
894}
895
896static ssize_t applesmc_calibrate_show(struct device *dev,
897 struct device_attribute *attr, char *sysfsbuf)
898{
899 return snprintf(sysfsbuf, PAGE_SIZE, "(%d,%d)\n", rest_x, rest_y);
900}
901
902static ssize_t applesmc_calibrate_store(struct device *dev,
903 struct device_attribute *attr, const char *sysfsbuf, size_t count)
904{
905 applesmc_calibrate();
906
907 return count;
908}
909
910static void applesmc_backlight_set(struct work_struct *work)
911{
912 applesmc_write_key(BACKLIGHT_KEY, backlight_state, 2);
913}
914static DECLARE_WORK(backlight_work, &applesmc_backlight_set);
915
916static void applesmc_brightness_set(struct led_classdev *led_cdev,
917 enum led_brightness value)
918{
919 int ret;
920
921 backlight_state[0] = value;
922 ret = queue_work(applesmc_led_wq, &backlight_work);
923
924 if (debug && (!ret))
925 dev_dbg(led_cdev->dev, "work was already on the queue.\n");
926}
927
928static ssize_t applesmc_key_count_show(struct device *dev,
929 struct device_attribute *attr, char *sysfsbuf)
930{
931 int ret;
932 u8 buffer[4];
933 u32 count;
934
935 ret = applesmc_read_key(KEY_COUNT_KEY, buffer, 4);
936 count = ((u32)buffer[0]<<24) + ((u32)buffer[1]<<16) +
937 ((u32)buffer[2]<<8) + buffer[3];
938
939 if (ret)
940 return ret;
941 else
942 return snprintf(sysfsbuf, PAGE_SIZE, "%d\n", count);
943}
944
945static ssize_t applesmc_key_at_index_read_show(struct device *dev,
946 struct device_attribute *attr, char *sysfsbuf)
947{
948 const struct applesmc_entry *entry;
949 int ret;
950
951 entry = applesmc_get_entry_by_index(key_at_index);
952 if (IS_ERR(entry))
953 return PTR_ERR(entry);
954 ret = applesmc_read_entry(entry, sysfsbuf, entry->len);
955 if (ret)
956 return ret;
957
958 return entry->len;
959}
960
961static ssize_t applesmc_key_at_index_data_length_show(struct device *dev,
962 struct device_attribute *attr, char *sysfsbuf)
963{
964 const struct applesmc_entry *entry;
965
966 entry = applesmc_get_entry_by_index(key_at_index);
967 if (IS_ERR(entry))
968 return PTR_ERR(entry);
969
970 return snprintf(sysfsbuf, PAGE_SIZE, "%d\n", entry->len);
971}
972
973static ssize_t applesmc_key_at_index_type_show(struct device *dev,
974 struct device_attribute *attr, char *sysfsbuf)
975{
976 const struct applesmc_entry *entry;
977
978 entry = applesmc_get_entry_by_index(key_at_index);
979 if (IS_ERR(entry))
980 return PTR_ERR(entry);
981
982 return snprintf(sysfsbuf, PAGE_SIZE, "%s\n", entry->type);
983}
984
985static ssize_t applesmc_key_at_index_name_show(struct device *dev,
986 struct device_attribute *attr, char *sysfsbuf)
987{
988 const struct applesmc_entry *entry;
989
990 entry = applesmc_get_entry_by_index(key_at_index);
991 if (IS_ERR(entry))
992 return PTR_ERR(entry);
993
994 return snprintf(sysfsbuf, PAGE_SIZE, "%s\n", entry->key);
995}
996
997static ssize_t applesmc_key_at_index_show(struct device *dev,
998 struct device_attribute *attr, char *sysfsbuf)
999{
1000 return snprintf(sysfsbuf, PAGE_SIZE, "%d\n", key_at_index);
1001}
1002
1003static ssize_t applesmc_key_at_index_store(struct device *dev,
1004 struct device_attribute *attr, const char *sysfsbuf, size_t count)
1005{
1006 unsigned long newkey;
1007
1008 if (kstrtoul(sysfsbuf, 10, &newkey) < 0
1009 || newkey >= smcreg.key_count)
1010 return -EINVAL;
1011
1012 key_at_index = newkey;
1013 return count;
1014}
1015
1016static struct led_classdev applesmc_backlight = {
1017 .name = "smc::kbd_backlight",
1018 .default_trigger = "nand-disk",
1019 .brightness_set = applesmc_brightness_set,
1020};
1021
1022static struct applesmc_node_group info_group[] = {
1023 { "name", applesmc_name_show },
1024 { "key_count", applesmc_key_count_show },
1025 { "key_at_index", applesmc_key_at_index_show, applesmc_key_at_index_store },
1026 { "key_at_index_name", applesmc_key_at_index_name_show },
1027 { "key_at_index_type", applesmc_key_at_index_type_show },
1028 { "key_at_index_data_length", applesmc_key_at_index_data_length_show },
1029 { "key_at_index_data", applesmc_key_at_index_read_show },
1030 { }
1031};
1032
1033static struct applesmc_node_group accelerometer_group[] = {
1034 { "position", applesmc_position_show },
1035 { "calibrate", applesmc_calibrate_show, applesmc_calibrate_store },
1036 { }
1037};
1038
1039static struct applesmc_node_group light_sensor_group[] = {
1040 { "light", applesmc_light_show },
1041 { }
1042};
1043
1044static struct applesmc_node_group fan_group[] = {
1045 { "fan%d_label", applesmc_show_fan_position },
1046 { "fan%d_input", applesmc_show_fan_speed, NULL, 0 },
1047 { "fan%d_min", applesmc_show_fan_speed, applesmc_store_fan_speed, 1 },
1048 { "fan%d_max", applesmc_show_fan_speed, NULL, 2 },
1049 { "fan%d_safe", applesmc_show_fan_speed, NULL, 3 },
1050 { "fan%d_output", applesmc_show_fan_speed, applesmc_store_fan_speed, 4 },
1051 { "fan%d_manual", applesmc_show_fan_manual, applesmc_store_fan_manual },
1052 { }
1053};
1054
1055static struct applesmc_node_group temp_group[] = {
1056 { "temp%d_label", applesmc_show_sensor_label },
1057 { "temp%d_input", applesmc_show_temperature },
1058 { }
1059};
1060
1061
1062
1063
1064
1065
1066static void applesmc_destroy_nodes(struct applesmc_node_group *groups)
1067{
1068 struct applesmc_node_group *grp;
1069 struct applesmc_dev_attr *node;
1070
1071 for (grp = groups; grp->nodes; grp++) {
1072 for (node = grp->nodes; node->sda.dev_attr.attr.name; node++)
1073 sysfs_remove_file(&pdev->dev.kobj,
1074 &node->sda.dev_attr.attr);
1075 kfree(grp->nodes);
1076 grp->nodes = NULL;
1077 }
1078}
1079
1080
1081
1082
1083static int applesmc_create_nodes(struct applesmc_node_group *groups, int num)
1084{
1085 struct applesmc_node_group *grp;
1086 struct applesmc_dev_attr *node;
1087 struct attribute *attr;
1088 int ret, i;
1089
1090 for (grp = groups; grp->format; grp++) {
1091 grp->nodes = kcalloc(num + 1, sizeof(*node), GFP_KERNEL);
1092 if (!grp->nodes) {
1093 ret = -ENOMEM;
1094 goto out;
1095 }
1096 for (i = 0; i < num; i++) {
1097 node = &grp->nodes[i];
1098 sprintf(node->name, grp->format, i + 1);
1099 node->sda.index = (grp->option << 16) | (i & 0xffff);
1100 node->sda.dev_attr.show = grp->show;
1101 node->sda.dev_attr.store = grp->store;
1102 attr = &node->sda.dev_attr.attr;
1103 sysfs_attr_init(attr);
1104 attr->name = node->name;
1105 attr->mode = S_IRUGO | (grp->store ? S_IWUSR : 0);
1106 ret = sysfs_create_file(&pdev->dev.kobj, attr);
1107 if (ret) {
1108 attr->name = NULL;
1109 goto out;
1110 }
1111 }
1112 }
1113
1114 return 0;
1115out:
1116 applesmc_destroy_nodes(groups);
1117 return ret;
1118}
1119
1120
1121static int applesmc_create_accelerometer(void)
1122{
1123 struct input_dev *idev;
1124 int ret;
1125
1126 if (!smcreg.has_accelerometer)
1127 return 0;
1128
1129 ret = applesmc_create_nodes(accelerometer_group, 1);
1130 if (ret)
1131 goto out;
1132
1133 applesmc_idev = input_allocate_polled_device();
1134 if (!applesmc_idev) {
1135 ret = -ENOMEM;
1136 goto out_sysfs;
1137 }
1138
1139 applesmc_idev->poll = applesmc_idev_poll;
1140 applesmc_idev->poll_interval = APPLESMC_POLL_INTERVAL;
1141
1142
1143 applesmc_calibrate();
1144
1145
1146 idev = applesmc_idev->input;
1147 idev->name = "applesmc";
1148 idev->id.bustype = BUS_HOST;
1149 idev->dev.parent = &pdev->dev;
1150 idev->evbit[0] = BIT_MASK(EV_ABS);
1151 input_set_abs_params(idev, ABS_X,
1152 -256, 256, APPLESMC_INPUT_FUZZ, APPLESMC_INPUT_FLAT);
1153 input_set_abs_params(idev, ABS_Y,
1154 -256, 256, APPLESMC_INPUT_FUZZ, APPLESMC_INPUT_FLAT);
1155
1156 ret = input_register_polled_device(applesmc_idev);
1157 if (ret)
1158 goto out_idev;
1159
1160 return 0;
1161
1162out_idev:
1163 input_free_polled_device(applesmc_idev);
1164
1165out_sysfs:
1166 applesmc_destroy_nodes(accelerometer_group);
1167
1168out:
1169 pr_warn("driver init failed (ret=%d)!\n", ret);
1170 return ret;
1171}
1172
1173
1174static void applesmc_release_accelerometer(void)
1175{
1176 if (!smcreg.has_accelerometer)
1177 return;
1178 input_unregister_polled_device(applesmc_idev);
1179 input_free_polled_device(applesmc_idev);
1180 applesmc_destroy_nodes(accelerometer_group);
1181}
1182
1183static int applesmc_create_light_sensor(void)
1184{
1185 if (!smcreg.num_light_sensors)
1186 return 0;
1187 return applesmc_create_nodes(light_sensor_group, 1);
1188}
1189
1190static void applesmc_release_light_sensor(void)
1191{
1192 if (!smcreg.num_light_sensors)
1193 return;
1194 applesmc_destroy_nodes(light_sensor_group);
1195}
1196
1197static int applesmc_create_key_backlight(void)
1198{
1199 if (!smcreg.has_key_backlight)
1200 return 0;
1201 applesmc_led_wq = create_singlethread_workqueue("applesmc-led");
1202 if (!applesmc_led_wq)
1203 return -ENOMEM;
1204 return led_classdev_register(&pdev->dev, &applesmc_backlight);
1205}
1206
1207static void applesmc_release_key_backlight(void)
1208{
1209 if (!smcreg.has_key_backlight)
1210 return;
1211 led_classdev_unregister(&applesmc_backlight);
1212 destroy_workqueue(applesmc_led_wq);
1213}
1214
1215static int applesmc_dmi_match(const struct dmi_system_id *id)
1216{
1217 return 1;
1218}
1219
1220
1221
1222
1223
1224static __initdata struct dmi_system_id applesmc_whitelist[] = {
1225 { applesmc_dmi_match, "Apple MacBook Air", {
1226 DMI_MATCH(DMI_BOARD_VENDOR, "Apple"),
1227 DMI_MATCH(DMI_PRODUCT_NAME, "MacBookAir") },
1228 },
1229 { applesmc_dmi_match, "Apple MacBook Pro", {
1230 DMI_MATCH(DMI_BOARD_VENDOR, "Apple"),
1231 DMI_MATCH(DMI_PRODUCT_NAME, "MacBookPro") },
1232 },
1233 { applesmc_dmi_match, "Apple MacBook", {
1234 DMI_MATCH(DMI_BOARD_VENDOR, "Apple"),
1235 DMI_MATCH(DMI_PRODUCT_NAME, "MacBook") },
1236 },
1237 { applesmc_dmi_match, "Apple Macmini", {
1238 DMI_MATCH(DMI_BOARD_VENDOR, "Apple"),
1239 DMI_MATCH(DMI_PRODUCT_NAME, "Macmini") },
1240 },
1241 { applesmc_dmi_match, "Apple MacPro", {
1242 DMI_MATCH(DMI_BOARD_VENDOR, "Apple"),
1243 DMI_MATCH(DMI_PRODUCT_NAME, "MacPro") },
1244 },
1245 { applesmc_dmi_match, "Apple iMac", {
1246 DMI_MATCH(DMI_BOARD_VENDOR, "Apple"),
1247 DMI_MATCH(DMI_PRODUCT_NAME, "iMac") },
1248 },
1249 { .ident = NULL }
1250};
1251
1252static int __init applesmc_init(void)
1253{
1254 int ret;
1255
1256 if (!dmi_check_system(applesmc_whitelist)) {
1257 pr_warn("supported laptop not found!\n");
1258 ret = -ENODEV;
1259 goto out;
1260 }
1261
1262 if (!request_region(APPLESMC_DATA_PORT, APPLESMC_NR_PORTS,
1263 "applesmc")) {
1264 ret = -ENXIO;
1265 goto out;
1266 }
1267
1268 ret = platform_driver_register(&applesmc_driver);
1269 if (ret)
1270 goto out_region;
1271
1272 pdev = platform_device_register_simple("applesmc", APPLESMC_DATA_PORT,
1273 NULL, 0);
1274 if (IS_ERR(pdev)) {
1275 ret = PTR_ERR(pdev);
1276 goto out_driver;
1277 }
1278
1279
1280 ret = applesmc_init_smcreg();
1281 if (ret)
1282 goto out_device;
1283
1284 ret = applesmc_create_nodes(info_group, 1);
1285 if (ret)
1286 goto out_smcreg;
1287
1288 ret = applesmc_create_nodes(fan_group, smcreg.fan_count);
1289 if (ret)
1290 goto out_info;
1291
1292 ret = applesmc_create_nodes(temp_group, smcreg.index_count);
1293 if (ret)
1294 goto out_fans;
1295
1296 ret = applesmc_create_accelerometer();
1297 if (ret)
1298 goto out_temperature;
1299
1300 ret = applesmc_create_light_sensor();
1301 if (ret)
1302 goto out_accelerometer;
1303
1304 ret = applesmc_create_key_backlight();
1305 if (ret)
1306 goto out_light_sysfs;
1307
1308 hwmon_dev = hwmon_device_register(&pdev->dev);
1309 if (IS_ERR(hwmon_dev)) {
1310 ret = PTR_ERR(hwmon_dev);
1311 goto out_light_ledclass;
1312 }
1313
1314 return 0;
1315
1316out_light_ledclass:
1317 applesmc_release_key_backlight();
1318out_light_sysfs:
1319 applesmc_release_light_sensor();
1320out_accelerometer:
1321 applesmc_release_accelerometer();
1322out_temperature:
1323 applesmc_destroy_nodes(temp_group);
1324out_fans:
1325 applesmc_destroy_nodes(fan_group);
1326out_info:
1327 applesmc_destroy_nodes(info_group);
1328out_smcreg:
1329 applesmc_destroy_smcreg();
1330out_device:
1331 platform_device_unregister(pdev);
1332out_driver:
1333 platform_driver_unregister(&applesmc_driver);
1334out_region:
1335 release_region(APPLESMC_DATA_PORT, APPLESMC_NR_PORTS);
1336out:
1337 pr_warn("driver init failed (ret=%d)!\n", ret);
1338 return ret;
1339}
1340
1341static void __exit applesmc_exit(void)
1342{
1343 hwmon_device_unregister(hwmon_dev);
1344 applesmc_release_key_backlight();
1345 applesmc_release_light_sensor();
1346 applesmc_release_accelerometer();
1347 applesmc_destroy_nodes(temp_group);
1348 applesmc_destroy_nodes(fan_group);
1349 applesmc_destroy_nodes(info_group);
1350 applesmc_destroy_smcreg();
1351 platform_device_unregister(pdev);
1352 platform_driver_unregister(&applesmc_driver);
1353 release_region(APPLESMC_DATA_PORT, APPLESMC_NR_PORTS);
1354}
1355
1356module_init(applesmc_init);
1357module_exit(applesmc_exit);
1358
1359MODULE_AUTHOR("Nicolas Boichat");
1360MODULE_DESCRIPTION("Apple SMC");
1361MODULE_LICENSE("GPL v2");
1362MODULE_DEVICE_TABLE(dmi, applesmc_whitelist);
1363