aboutsummaryrefslogtreecommitdiff
path: root/drivers/hwmon/ftsteutates.c
blob: 0f0277e7aae5140015ed179cab6ef419800cd4c7 (plain)
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
31
32
33
34
35
36
37
38
39
40
41
42
43
44
45
46
47
48
49
50
51
52
53
54
55
56
57
58
59
60
61
62
63
64
65
66
67
68
69
70
71
72
73
74
75
76
77
78
79
80
81
82
83
84
85
86
87
88
89
90
91
92
93
94
95
96
97
98
99
100
101
102
103
104
105
106
107
108
109
110
111
112
113
114
115
116
117
118
119
120
121
122
123
124
125
126
127
128
129
130
131
132
133
134
135
136
137
138
139
140
141
142
143
144
145
146
147
148
149
150
151
152
153
154
155
156
157
158
159
160
161
162
163
164
165
166
167
168
169
170
171
172
173
174
175
176
177
178
179
180
181
182
183
184
185
186
187
188
189
190
191
192
193
194
195
196
197
198
199
200
201
202
203
204
205
206
207
208
209
210
211
212
213
214
215
216
217
218
219
220
221
222
223
224
225
226
227
228
229
230
231
232
233
234
235
236
237
238
239
240
241
242
243
244
245
246
247
248
249
250
251
252
253
254
255
256
257
258
259
260
261
262
263
264
265
266
267
268
269
270
271
272
273
274
275
276
277
278
279
280
281
282
283
284
285
286
287
288
289
290
291
292
293
294
295
296
297
298
299
300
301
302
303
304
305
306
307
308
309
310
311
312
313
314
315
316
317
318
319
320
321
322
323
324
325
326
327
328
329
330
331
332
333
334
335
336
337
338
339
340
341
342
343
344
345
346
347
348
349
350
351
352
353
354
355
356
357
358
359
360
361
362
363
364
365
366
367
368
369
370
371
372
373
374
375
376
377
378
379
380
381
382
383
384
385
386
387
388
389
390
391
392
393
394
395
396
397
398
399
400
401
402
403
404
405
406
407
408
409
410
411
412
413
414
415
416
417
418
419
420
421
422
423
424
425
426
427
428
429
430
431
432
433
434
435
436
437
438
439
440
441
442
443
444
445
446
447
448
449
450
451
452
453
454
455
456
457
458
459
460
461
462
463
464
465
466
467
468
469
470
471
472
473
474
475
476
477
478
479
480
481
482
483
484
485
486
487
488
489
490
491
492
493
494
495
496
497
498
499
500
501
502
503
504
505
506
507
508
509
510
511
512
513
514
515
516
517
518
519
520
521
522
523
524
525
526
527
528
529
530
531
532
533
534
535
536
537
538
539
540
541
542
543
544
545
546
547
548
549
550
551
552
553
554
555
556
557
558
559
560
561
562
563
564
565
566
567
568
569
570
571
572
573
574
575
576
577
578
579
580
581
582
583
584
585
586
587
588
589
590
591
592
593
594
595
596
597
598
599
600
601
602
603
604
605
606
607
608
609
610
611
612
613
614
615
616
617
618
619
620
621
622
623
624
625
626
627
628
629
630
631
632
633
634
635
636
637
638
639
640
641
642
643
644
645
646
647
648
649
650
651
652
653
654
655
656
657
658
659
660
661
662
663
664
665
666
667
668
669
670
671
672
673
674
675
676
677
678
679
680
681
682
683
684
685
686
687
688
689
690
691
692
693
694
695
696
697
698
699
700
701
702
703
704
705
706
707
708
709
710
711
712
713
714
715
716
717
718
719
720
721
722
723
724
725
726
727
728
729
730
731
732
733
734
735
736
737
738
739
740
741
742
743
744
745
746
747
748
749
750
751
752
753
754
755
756
757
758
759
760
761
762
763
764
765
766
767
768
769
770
771
772
773
774
775
776
777
778
779
780
781
782
783
784
785
786
787
788
789
790
791
792
793
794
795
796
797
798
799
800
801
802
803
804
805
806
807
808
809
810
811
812
813
814
815
816
817
818
819
820
821
822
823
824
825
826
827
828
829
830
831
832
833
834
835
836
837
838
839
840
841
842
843
844
845
846
847
848
849
850
851
852
853
854
855
856
857
858
859
860
861
862
863
864
/*
 * Support for the FTS Systemmonitoring Chip "Teutates"
 *
 * Copyright (C) 2016 Fujitsu Technology Solutions GmbH,
 *		  Thilo Cestonaro <thilo.cestonaro@ts.fujitsu.com>
 *
 * This program is free software; you can redistribute it and/or modify
 * it under the terms of the GNU General Public License as published by
 * the Free Software Foundation; either version 2 of the License, or
 * (at your option) any later version.
 *
 * This program is distributed in the hope that it will be useful,
 * but WITHOUT ANY WARRANTY; without even the implied warranty of
 * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
 * GNU General Public License for more details.
 *
 */
#include <linux/err.h>
#include <linux/fs.h>
#include <linux/hwmon.h>
#include <linux/hwmon-sysfs.h>
#include <linux/i2c.h>
#include <linux/init.h>
#include <linux/jiffies.h>
#include <linux/module.h>
#include <linux/mutex.h>
#include <linux/slab.h>
#include <linux/sysfs.h>
#include <linux/uaccess.h>
#include <linux/watchdog.h>

#define FTS_DEVICE_ID_REG		0x0000
#define FTS_DEVICE_REVISION_REG		0x0001
#define FTS_DEVICE_STATUS_REG		0x0004
#define FTS_SATELLITE_STATUS_REG	0x0005
#define FTS_EVENT_STATUS_REG		0x0006
#define FTS_GLOBAL_CONTROL_REG		0x0007

#define FTS_DEVICE_DETECT_REG_1		0x0C
#define FTS_DEVICE_DETECT_REG_2		0x0D
#define FTS_DEVICE_DETECT_REG_3		0x0E

#define FTS_SENSOR_EVENT_REG		0x0010

#define FTS_FAN_EVENT_REG		0x0014
#define FTS_FAN_PRESENT_REG		0x0015

#define FTS_POWER_ON_TIME_COUNTER_A	0x007A
#define FTS_POWER_ON_TIME_COUNTER_B	0x007B
#define FTS_POWER_ON_TIME_COUNTER_C	0x007C

#define FTS_PAGE_SELECT_REG		0x007F

#define FTS_WATCHDOG_TIME_PRESET	0x000B
#define FTS_WATCHDOG_CONTROL		0x5081

#define FTS_NO_FAN_SENSORS		0x08
#define FTS_NO_TEMP_SENSORS		0x10
#define FTS_NO_VOLT_SENSORS		0x04

static const unsigned short normal_i2c[] = { 0x73, I2C_CLIENT_END };

static struct i2c_device_id fts_id[] = {
	{ "ftsteutates", 0 },
	{ }
};
MODULE_DEVICE_TABLE(i2c, fts_id);

enum WATCHDOG_RESOLUTION {
	seconds = 1,
	minutes = 60
};

struct fts_data {
	struct i2c_client *client;
	/* update sensor data lock */
	struct mutex update_lock;
	/* read/write register lock */
	struct mutex access_lock;
	unsigned long last_updated; /* in jiffies */
	struct watchdog_device wdd;
	enum WATCHDOG_RESOLUTION resolution;
	bool valid; /* false until following fields are valid */

	u8 volt[FTS_NO_VOLT_SENSORS];

	u8 temp_input[FTS_NO_TEMP_SENSORS];
	u8 temp_alarm;

	u8 fan_present;
	u8 fan_input[FTS_NO_FAN_SENSORS]; /* in rps */
	u8 fan_source[FTS_NO_FAN_SENSORS];
	u8 fan_alarm;
};

#define FTS_REG_FAN_INPUT(idx) ((idx) + 0x20)
#define FTS_REG_FAN_SOURCE(idx) ((idx) + 0x30)
#define FTS_REG_FAN_CONTROL(idx) (((idx) << 16) + 0x4881)

#define FTS_REG_TEMP_INPUT(idx) ((idx) + 0x40)
#define FTS_REG_TEMP_CONTROL(idx) (((idx) << 16) + 0x0681)

#define FTS_REG_VOLT(idx) ((idx) + 0x18)

/*****************************************************************************/
/* I2C Helper functions							     */
/*****************************************************************************/
static int fts_read_byte(struct i2c_client *client, unsigned short reg)
{
	int ret;
	unsigned char page = reg >> 8;
	struct fts_data *data = dev_get_drvdata(&client->dev);

	mutex_lock(&data->access_lock);

	dev_dbg(&client->dev, "page select - page: 0x%.02x\n", page);
	ret = i2c_smbus_write_byte_data(client, FTS_PAGE_SELECT_REG, page);
	if (ret < 0)
		goto error;

	reg &= 0xFF;
	ret = i2c_smbus_read_byte_data(client, reg);
	dev_dbg(&client->dev, "read - reg: 0x%.02x: val: 0x%.02x\n", reg, ret);

error:
	mutex_unlock(&data->access_lock);
	return ret;
}

static int fts_write_byte(struct i2c_client *client, unsigned short reg,
			  unsigned char value)
{
	int ret;
	unsigned char page = reg >> 8;
	struct fts_data *data = dev_get_drvdata(&client->dev);

	mutex_lock(&data->access_lock);

	dev_dbg(&client->dev, "page select - page: 0x%.02x\n", page);
	ret = i2c_smbus_write_byte_data(client, FTS_PAGE_SELECT_REG, page);
	if (ret < 0)
		goto error;

	reg &= 0xFF;
	dev_dbg(&client->dev,
		"write - reg: 0x%.02x: val: 0x%.02x\n", reg, value);
	ret = i2c_smbus_write_byte_data(client, reg, value);

error:
	mutex_unlock(&data->access_lock);
	return ret;
}

/*****************************************************************************/
/* Data Updater Helper function						     */
/*****************************************************************************/
static int fts_update_device(struct fts_data *data)
{
	int i;
	int err = 0;

	mutex_lock(&data->update_lock);
	if (!time_after(jiffies, data->last_updated + 2 * HZ) && data->valid)
		goto exit;

	err = fts_read_byte(data->client, FTS_DEVICE_STATUS_REG);
	if (err < 0)
		goto exit;

	data->valid = !!(err & 0x02); /* Data not ready yet */
	if (unlikely(!data->valid)) {
		err = -EAGAIN;
		goto exit;
	}

	err = fts_read_byte(data->client, FTS_FAN_PRESENT_REG);
	if (err < 0)
		goto exit;
	data->fan_present = err;

	err = fts_read_byte(data->client, FTS_FAN_EVENT_REG);
	if (err < 0)
		goto exit;
	data->fan_alarm = err;

	for (i = 0; i < FTS_NO_FAN_SENSORS; i++) {
		if (data->fan_present & BIT(i)) {
			err = fts_read_byte(data->client, FTS_REG_FAN_INPUT(i));
			if (err < 0)
				goto exit;
			data->fan_input[i] = err;

			err = fts_read_byte(data->client,
					    FTS_REG_FAN_SOURCE(i));
			if (err < 0)
				goto exit;
			data->fan_source[i] = err;
		} else {
			data->fan_input[i] = 0;
			data->fan_source[i] = 0;
		}
	}

	err = fts_read_byte(data->client, FTS_SENSOR_EVENT_REG);
	if (err < 0)
		goto exit;
	data->temp_alarm = err;

	for (i = 0; i < FTS_NO_TEMP_SENSORS; i++) {
		err = fts_read_byte(data->client, FTS_REG_TEMP_INPUT(i));
		if (err < 0)
			goto exit;
		data->temp_input[i] = err;
	}

	for (i = 0; i < FTS_NO_VOLT_SENSORS; i++) {
		err = fts_read_byte(data->client, FTS_REG_VOLT(i));
		if (err < 0)
			goto exit;
		data->volt[i] = err;
	}
	data->last_updated = jiffies;
	err = 0;
exit:
	mutex_unlock(&data->update_lock);
	return err;
}

/*****************************************************************************/
/* Watchdog functions							     */
/*****************************************************************************/
static int fts_wd_set_resolution(struct fts_data *data,
				 enum WATCHDOG_RESOLUTION resolution)
{
	int ret;

	if (data->resolution == resolution)
		return 0;

	ret = fts_read_byte(data->client, FTS_WATCHDOG_CONTROL);
	if (ret < 0)
		return ret;

	if ((resolution == seconds && ret & BIT(1)) ||
	    (resolution == minutes && (ret & BIT(1)) == 0)) {
		data->resolution = resolution;
		return 0;
	}

	if (resolution == seconds)
		ret |= BIT(1);
	else
		ret &= ~BIT(1);

	ret = fts_write_byte(data->client, FTS_WATCHDOG_CONTROL, ret);
	if (ret < 0)
		return ret;

	data->resolution = resolution;
	return ret;
}

static int fts_wd_set_timeout(struct watchdog_device *wdd, unsigned int timeout)
{
	struct fts_data *data;
	enum WATCHDOG_RESOLUTION resolution = seconds;
	int ret;

	data = watchdog_get_drvdata(wdd);
	/* switch watchdog resolution to minutes if timeout does not fit
	 * into a byte
	 */
	if (timeout > 0xFF) {
		timeout = DIV_ROUND_UP(timeout, 60) * 60;
		resolution = minutes;
	}

	ret = fts_wd_set_resolution(data, resolution);
	if (ret < 0)
		return ret;

	wdd->timeout = timeout;
	return 0;
}

static int fts_wd_start(struct watchdog_device *wdd)
{
	struct fts_data *data = watchdog_get_drvdata(wdd);

	return fts_write_byte(data->client, FTS_WATCHDOG_TIME_PRESET,
			      wdd->timeout / (u8)data->resolution);
}

static int fts_wd_stop(struct watchdog_device *wdd)
{
	struct fts_data *data;

	data = watchdog_get_drvdata(wdd);
	return fts_write_byte(data->client, FTS_WATCHDOG_TIME_PRESET, 0);
}

static const struct watchdog_info fts_wd_info = {
	.options = WDIOF_SETTIMEOUT | WDIOF_KEEPALIVEPING | WDIOF_MAGICCLOSE,
	.identity = "FTS Teutates Hardware Watchdog",
};

static const struct watchdog_ops fts_wd_ops = {
	.owner = THIS_MODULE,
	.start = fts_wd_start,
	.stop = fts_wd_stop,
	.set_timeout = fts_wd_set_timeout,
};

static int fts_watchdog_init(struct fts_data *data)
{
	int timeout, ret;

	watchdog_set_drvdata(&data->wdd, data);

	timeout = fts_read_byte(data->client, FTS_WATCHDOG_TIME_PRESET);
	if (timeout < 0)
		return timeout;

	/* watchdog not running, set timeout to a default of 60 sec. */
	if (timeout == 0) {
		ret = fts_wd_set_resolution(data, seconds);
		if (ret < 0)
			return ret;
		data->wdd.timeout = 60;
	} else {
		ret = fts_read_byte(data->client, FTS_WATCHDOG_CONTROL);
		if (ret < 0)
			return ret;

		data->resolution = ret & BIT(1) ? seconds : minutes;
		data->wdd.timeout = timeout * (u8)data->resolution;
		set_bit(WDOG_HW_RUNNING, &data->wdd.status);
	}

	/* Register our watchdog part */
	data->wdd.info = &fts_wd_info;
	data->wdd.ops = &fts_wd_ops;
	data->wdd.parent = &data->client->dev;
	data->wdd.min_timeout = 1;

	/* max timeout 255 minutes. */
	data->wdd.max_hw_heartbeat_ms = 0xFF * 60 * MSEC_PER_SEC;

	return watchdog_register_device(&data->wdd);
}

/*****************************************************************************/
/* SysFS handler functions						     */
/*****************************************************************************/
static ssize_t show_in_value(struct device *dev,
			     struct device_attribute *devattr, char *buf)
{
	struct fts_data *data = dev_get_drvdata(dev);
	int index = to_sensor_dev_attr(devattr)->index;
	int err;

	err = fts_update_device(data);
	if (err < 0)
		return err;

	return sprintf(buf, "%u\n", data->volt[index]);
}

static ssize_t show_temp_value(struct device *dev,
			       struct device_attribute *devattr, char *buf)
{
	struct fts_data *data = dev_get_drvdata(dev);
	int index = to_sensor_dev_attr(devattr)->index;
	int err;

	err = fts_update_device(data);
	if (err < 0)
		return err;

	return sprintf(buf, "%u\n", data->temp_input[index]);
}

static ssize_t show_temp_fault(struct device *dev,
			       struct device_attribute *devattr, char *buf)
{
	struct fts_data *data = dev_get_drvdata(dev);
	int index = to_sensor_dev_attr(devattr)->index;
	int err;

	err = fts_update_device(data);
	if (err < 0)
		return err;

	/* 00h Temperature = Sensor Error */
	return sprintf(buf, "%d\n", data->temp_input[index] == 0);
}

static ssize_t show_temp_alarm(struct device *dev,
			       struct device_attribute *devattr, char *buf)
{
	struct fts_data *data = dev_get_drvdata(dev);
	int index = to_sensor_dev_attr(devattr)->index;
	int err;

	err = fts_update_device(data);
	if (err < 0)
		return err;

	return sprintf(buf, "%u\n", !!(data->temp_alarm & BIT(index)));
}

static ssize_t
clear_temp_alarm(struct device *dev, struct device_attribute *devattr,
		 const char *buf, size_t count)
{
	struct fts_data *data = dev_get_drvdata(dev);
	int index = to_sensor_dev_attr(devattr)->index;
	long ret;

	ret = fts_update_device(data);
	if (ret < 0)
		return ret;

	if (kstrtoul(buf, 10, &ret) || ret != 0)
		return -EINVAL;

	mutex_lock(&data->update_lock);
	ret = fts_read_byte(data->client, FTS_REG_TEMP_CONTROL(index));
	if (ret < 0)
		goto error;

	ret = fts_write_byte(data->client, FTS_REG_TEMP_CONTROL(index),
			     ret | 0x1);
	if (ret < 0)
		goto error;

	data->valid = false;
error:
	mutex_unlock(&data->update_lock);
	return ret;
}

static ssize_t show_fan_value(struct device *dev,
			      struct device_attribute *devattr, char *buf)
{
	struct fts_data *data = dev_get_drvdata(dev);
	int index = to_sensor_dev_attr(devattr)->index;
	int err;

	err = fts_update_device(data);
	if (err < 0)
		return err;

	return sprintf(buf, "%u\n", data->fan_input[index]);
}

static ssize_t show_fan_source(struct device *dev,
			       struct device_attribute *devattr, char *buf)
{
	struct fts_data *data = dev_get_drvdata(dev);
	int index = to_sensor_dev_attr(devattr)->index;
	int err;

	err = fts_update_device(data);
	if (err < 0)
		return err;

	return sprintf(buf, "%u\n", data->fan_source[index]);
}

static ssize_t show_fan_alarm(struct device *dev,
			      struct device_attribute *devattr, char *buf)
{
	struct fts_data *data = dev_get_drvdata(dev);
	int index = to_sensor_dev_attr(devattr)->index;
	int err;

	err = fts_update_device(data);
	if (err < 0)
		return err;

	return sprintf(buf, "%d\n", !!(data->fan_alarm & BIT(index)));
}

static ssize_t
clear_fan_alarm(struct device *dev, struct device_attribute *devattr,
		const char *buf, size_t count)
{
	struct fts_data *data = dev_get_drvdata(dev);
	int index = to_sensor_dev_attr(devattr)->index;
	long ret;

	ret = fts_update_device(data);
	if (ret < 0)
		return ret;

	if (kstrtoul(buf, 10, &ret) || ret != 0)
		return -EINVAL;

	mutex_lock(&data->update_lock);
	ret = fts_read_byte(data->client, FTS_REG_FAN_CONTROL(index));
	if (ret < 0)
		goto error;

	ret = fts_write_byte(data->client, FTS_REG_FAN_CONTROL(index),
			     ret | 0x1);
	if (ret < 0)
		goto error;

	data->valid = false;
error:
	mutex_unlock(&data->update_lock);
	return ret;
}

/*****************************************************************************/
/* SysFS structs							     */
/*****************************************************************************/

/* Temprature sensors */
static SENSOR_DEVICE_ATTR(temp1_input,  S_IRUGO, show_temp_value, NULL, 0);
static SENSOR_DEVICE_ATTR(temp2_input,  S_IRUGO, show_temp_value, NULL, 1);
static SENSOR_DEVICE_ATTR(temp3_input,  S_IRUGO, show_temp_value, NULL, 2);
static SENSOR_DEVICE_ATTR(temp4_input,  S_IRUGO, show_temp_value, NULL, 3);
static SENSOR_DEVICE_ATTR(temp5_input,  S_IRUGO, show_temp_value, NULL, 4);
static SENSOR_DEVICE_ATTR(temp6_input,  S_IRUGO, show_temp_value, NULL, 5);
static SENSOR_DEVICE_ATTR(temp7_input,  S_IRUGO, show_temp_value, NULL, 6);
static SENSOR_DEVICE_ATTR(temp8_input,  S_IRUGO, show_temp_value, NULL, 7);
static SENSOR_DEVICE_ATTR(temp9_input,  S_IRUGO, show_temp_value, NULL, 8);
static SENSOR_DEVICE_ATTR(temp10_input, S_IRUGO, show_temp_value, NULL, 9);
static SENSOR_DEVICE_ATTR(temp11_input, S_IRUGO, show_temp_value, NULL, 10);
static SENSOR_DEVICE_ATTR(temp12_input, S_IRUGO, show_temp_value, NULL, 11);
static SENSOR_DEVICE_ATTR(temp13_input, S_IRUGO, show_temp_value, NULL, 12);
static SENSOR_DEVICE_ATTR(temp14_input, S_IRUGO, show_temp_value, NULL, 13);
static SENSOR_DEVICE_ATTR(temp15_input, S_IRUGO, show_temp_value, NULL, 14);
static SENSOR_DEVICE_ATTR(temp16_input, S_IRUGO, show_temp_value, NULL, 15);

static SENSOR_DEVICE_ATTR(temp1_fault,  S_IRUGO, show_temp_fault, NULL, 0);
static SENSOR_DEVICE_ATTR(temp2_fault,  S_IRUGO, show_temp_fault, NULL, 1);
static SENSOR_DEVICE_ATTR(temp3_fault,  S_IRUGO, show_temp_fault, NULL, 2);
static SENSOR_DEVICE_ATTR(temp4_fault,  S_IRUGO, show_temp_fault, NULL, 3);
static SENSOR_DEVICE_ATTR(temp5_fault,  S_IRUGO, show_temp_fault, NULL, 4);
static SENSOR_DEVICE_ATTR(temp6_fault,  S_IRUGO, show_temp_fault, NULL, 5);
static SENSOR_DEVICE_ATTR(temp7_fault,  S_IRUGO, show_temp_fault, NULL, 6);
static SENSOR_DEVICE_ATTR(temp8_fault,  S_IRUGO, show_temp_fault, NULL, 7);
static SENSOR_DEVICE_ATTR(temp9_fault,  S_IRUGO, show_temp_fault, NULL, 8);
static SENSOR_DEVICE_ATTR(temp10_fault, S_IRUGO, show_temp_fault, NULL, 9);
static SENSOR_DEVICE_ATTR(temp11_fault, S_IRUGO, show_temp_fault, NULL, 10);
static SENSOR_DEVICE_ATTR(temp12_fault, S_IRUGO, show_temp_fault, NULL, 11);
static SENSOR_DEVICE_ATTR(temp13_fault, S_IRUGO, show_temp_fault, NULL, 12);
static SENSOR_DEVICE_ATTR(temp14_fault, S_IRUGO, show_temp_fault, NULL, 13);
static SENSOR_DEVICE_ATTR(temp15_fault, S_IRUGO, show_temp_fault, NULL, 14);
static SENSOR_DEVICE_ATTR(temp16_fault, S_IRUGO, show_temp_fault, NULL, 15);

static SENSOR_DEVICE_ATTR(temp1_alarm, S_IRUGO | S_IWUSR, show_temp_alarm,
			  clear_temp_alarm, 0);
static SENSOR_DEVICE_ATTR(temp2_alarm, S_IRUGO | S_IWUSR, show_temp_alarm,
			  clear_temp_alarm, 1);
static SENSOR_DEVICE_ATTR(temp3_alarm, S_IRUGO | S_IWUSR, show_temp_alarm,
			  clear_temp_alarm, 2);
static SENSOR_DEVICE_ATTR(temp4_alarm, S_IRUGO | S_IWUSR, show_temp_alarm,
			  clear_temp_alarm, 3);
static SENSOR_DEVICE_ATTR(temp5_alarm, S_IRUGO | S_IWUSR, show_temp_alarm,
			  clear_temp_alarm, 4);
static SENSOR_DEVICE_ATTR(temp6_alarm, S_IRUGO | S_IWUSR, show_temp_alarm,
			  clear_temp_alarm, 5);
static SENSOR_DEVICE_ATTR(temp7_alarm, S_IRUGO | S_IWUSR, show_temp_alarm,
			  clear_temp_alarm, 6);
static SENSOR_DEVICE_ATTR(temp8_alarm, S_IRUGO | S_IWUSR, show_temp_alarm,
			  clear_temp_alarm, 7);
static SENSOR_DEVICE_ATTR(temp9_alarm, S_IRUGO | S_IWUSR, show_temp_alarm,
			  clear_temp_alarm, 8);
static SENSOR_DEVICE_ATTR(temp10_alarm, S_IRUGO | S_IWUSR, show_temp_alarm,
			  clear_temp_alarm, 9);
static SENSOR_DEVICE_ATTR(temp11_alarm, S_IRUGO | S_IWUSR, show_temp_alarm,
			  clear_temp_alarm, 10);
static SENSOR_DEVICE_ATTR(temp12_alarm, S_IRUGO | S_IWUSR, show_temp_alarm,
			  clear_temp_alarm, 11);
static SENSOR_DEVICE_ATTR(temp13_alarm, S_IRUGO | S_IWUSR, show_temp_alarm,
			  clear_temp_alarm, 12);
static SENSOR_DEVICE_ATTR(temp14_alarm, S_IRUGO | S_IWUSR, show_temp_alarm,
			  clear_temp_alarm, 13);
static SENSOR_DEVICE_ATTR(temp15_alarm, S_IRUGO | S_IWUSR, show_temp_alarm,
			  clear_temp_alarm, 14);
static SENSOR_DEVICE_ATTR(temp16_alarm, S_IRUGO | S_IWUSR, show_temp_alarm,
			  clear_temp_alarm, 15);

static struct attribute *fts_temp_attrs[] = {
	&sensor_dev_attr_temp1_input.dev_attr.attr,
	&sensor_dev_attr_temp2_input.dev_attr.attr,
	&sensor_dev_attr_temp3_input.dev_attr.attr,
	&sensor_dev_attr_temp4_input.dev_attr.attr,
	&sensor_dev_attr_temp5_input.dev_attr.attr,
	&sensor_dev_attr_temp6_input.dev_attr.attr,
	&sensor_dev_attr_temp7_input.dev_attr.attr,
	&sensor_dev_attr_temp8_input.dev_attr.attr,
	&sensor_dev_attr_temp9_input.dev_attr.attr,
	&sensor_dev_attr_temp10_input.dev_attr.attr,
	&sensor_dev_attr_temp11_input.dev_attr.attr,
	&sensor_dev_attr_temp12_input.dev_attr.attr,
	&sensor_dev_attr_temp13_input.dev_attr.attr,
	&sensor_dev_attr_temp14_input.dev_attr.attr,
	&sensor_dev_attr_temp15_input.dev_attr.attr,
	&sensor_dev_attr_temp16_input.dev_attr.attr,

	&sensor_dev_attr_temp1_fault.dev_attr.attr,
	&sensor_dev_attr_temp2_fault.dev_attr.attr,
	&sensor_dev_attr_temp3_fault.dev_attr.attr,
	&sensor_dev_attr_temp4_fault.dev_attr.attr,
	&sensor_dev_attr_temp5_fault.dev_attr.attr,
	&sensor_dev_attr_temp6_fault.dev_attr.attr,
	&sensor_dev_attr_temp7_fault.dev_attr.attr,
	&sensor_dev_attr_temp8_fault.dev_attr.attr,
	&sensor_dev_attr_temp9_fault.dev_attr.attr,
	&sensor_dev_attr_temp10_fault.dev_attr.attr,
	&sensor_dev_attr_temp11_fault.dev_attr.attr,
	&sensor_dev_attr_temp12_fault.dev_attr.attr,
	&sensor_dev_attr_temp13_fault.dev_attr.attr,
	&sensor_dev_attr_temp14_fault.dev_attr.attr,
	&sensor_dev_attr_temp15_fault.dev_attr.attr,
	&sensor_dev_attr_temp16_fault.dev_attr.attr,

	&sensor_dev_attr_temp1_alarm.dev_attr.attr,
	&sensor_dev_attr_temp2_alarm.dev_attr.attr,
	&sensor_dev_attr_temp3_alarm.dev_attr.attr,
	&sensor_dev_attr_temp4_alarm.dev_attr.attr,
	&sensor_dev_attr_temp5_alarm.dev_attr.attr,
	&sensor_dev_attr_temp6_alarm.dev_attr.attr,
	&sensor_dev_attr_temp7_alarm.dev_attr.attr,
	&sensor_dev_attr_temp8_alarm.dev_attr.attr,
	&sensor_dev_attr_temp9_alarm.dev_attr.attr,
	&sensor_dev_attr_temp10_alarm.dev_attr.attr,
	&sensor_dev_attr_temp11_alarm.dev_attr.attr,
	&sensor_dev_attr_temp12_alarm.dev_attr.attr,
	&sensor_dev_attr_temp13_alarm.dev_attr.attr,
	&sensor_dev_attr_temp14_alarm.dev_attr.attr,
	&sensor_dev_attr_temp15_alarm.dev_attr.attr,
	&sensor_dev_attr_temp16_alarm.dev_attr.attr,
	NULL
};

/* Fans */
static SENSOR_DEVICE_ATTR(fan1_input, S_IRUGO, show_fan_value, NULL, 0);
static SENSOR_DEVICE_ATTR(fan2_input, S_IRUGO, show_fan_value, NULL, 1);
static SENSOR_DEVICE_ATTR(fan3_input, S_IRUGO, show_fan_value, NULL, 2);
static SENSOR_DEVICE_ATTR(fan4_input, S_IRUGO, show_fan_value, NULL, 3);
static SENSOR_DEVICE_ATTR(fan5_input, S_IRUGO, show_fan_value, NULL, 4);
static SENSOR_DEVICE_ATTR(fan6_input, S_IRUGO, show_fan_value, NULL, 5);
static SENSOR_DEVICE_ATTR(fan7_input, S_IRUGO, show_fan_value, NULL, 6);
static SENSOR_DEVICE_ATTR(fan8_input, S_IRUGO, show_fan_value, NULL, 7);

static SENSOR_DEVICE_ATTR(fan1_source, S_IRUGO, show_fan_source, NULL, 0);
static SENSOR_DEVICE_ATTR(fan2_source, S_IRUGO, show_fan_source, NULL, 1);
static SENSOR_DEVICE_ATTR(fan3_source, S_IRUGO, show_fan_source, NULL, 2);
static SENSOR_DEVICE_ATTR(fan4_source, S_IRUGO, show_fan_source, NULL, 3);
static SENSOR_DEVICE_ATTR(fan5_source, S_IRUGO, show_fan_source, NULL, 4);
static SENSOR_DEVICE_ATTR(fan6_source, S_IRUGO, show_fan_source, NULL, 5);
static SENSOR_DEVICE_ATTR(fan7_source, S_IRUGO, show_fan_source, NULL, 6);
static SENSOR_DEVICE_ATTR(fan8_source, S_IRUGO, show_fan_source, NULL, 7);

static SENSOR_DEVICE_ATTR(fan1_alarm, S_IRUGO | S_IWUSR,
			 show_fan_alarm, clear_fan_alarm, 0);
static SENSOR_DEVICE_ATTR(fan2_alarm, S_IRUGO | S_IWUSR,
			 show_fan_alarm, clear_fan_alarm, 1);
static SENSOR_DEVICE_ATTR(fan3_alarm, S_IRUGO | S_IWUSR,
			 show_fan_alarm, clear_fan_alarm, 2);
static SENSOR_DEVICE_ATTR(fan4_alarm, S_IRUGO | S_IWUSR,
			 show_fan_alarm, clear_fan_alarm, 3);
static SENSOR_DEVICE_ATTR(fan5_alarm, S_IRUGO | S_IWUSR,
			 show_fan_alarm, clear_fan_alarm, 4);
static SENSOR_DEVICE_ATTR(fan6_alarm, S_IRUGO | S_IWUSR,
			 show_fan_alarm, clear_fan_alarm, 5);
static SENSOR_DEVICE_ATTR(fan7_alarm, S_IRUGO | S_IWUSR,
			 show_fan_alarm, clear_fan_alarm, 6);
static SENSOR_DEVICE_ATTR(fan8_alarm, S_IRUGO | S_IWUSR,
			 show_fan_alarm, clear_fan_alarm, 7);

static struct attribute *fts_fan_attrs[] = {
	&sensor_dev_attr_fan1_input.dev_attr.attr,
	&sensor_dev_attr_fan2_input.dev_attr.attr,
	&sensor_dev_attr_fan3_input.dev_attr.attr,
	&sensor_dev_attr_fan4_input.dev_attr.attr,
	&sensor_dev_attr_fan5_input.dev_attr.attr,
	&sensor_dev_attr_fan6_input.dev_attr.attr,
	&sensor_dev_attr_fan7_input.dev_attr.attr,
	&sensor_dev_attr_fan8_input.dev_attr.attr,

	&sensor_dev_attr_fan1_source.dev_attr.attr,
	&sensor_dev_attr_fan2_source.dev_attr.attr,
	&sensor_dev_attr_fan3_source.dev_attr.attr,
	&sensor_dev_attr_fan4_source.dev_attr.attr,
	&sensor_dev_attr_fan5_source.dev_attr.attr,
	&sensor_dev_attr_fan6_source.dev_attr.attr,
	&sensor_dev_attr_fan7_source.dev_attr.attr,
	&sensor_dev_attr_fan8_source.dev_attr.attr,

	&sensor_dev_attr_fan1_alarm.dev_attr.attr,
	&sensor_dev_attr_fan2_alarm.dev_attr.attr,
	&sensor_dev_attr_fan3_alarm.dev_attr.attr,
	&sensor_dev_attr_fan4_alarm.dev_attr.attr,
	&sensor_dev_attr_fan5_alarm.dev_attr.attr,
	&sensor_dev_attr_fan6_alarm.dev_attr.attr,
	&sensor_dev_attr_fan7_alarm.dev_attr.attr,
	&sensor_dev_attr_fan8_alarm.dev_attr.attr,
	NULL
};

/* Voltages */
static SENSOR_DEVICE_ATTR(in1_input, S_IRUGO, show_in_value, NULL, 0);
static SENSOR_DEVICE_ATTR(in2_input, S_IRUGO, show_in_value, NULL, 1);
static SENSOR_DEVICE_ATTR(in3_input, S_IRUGO, show_in_value, NULL, 2);
static SENSOR_DEVICE_ATTR(in4_input, S_IRUGO, show_in_value, NULL, 3);
static struct attribute *fts_voltage_attrs[] = {
	&sensor_dev_attr_in1_input.dev_attr.attr,
	&sensor_dev_attr_in2_input.dev_attr.attr,
	&sensor_dev_attr_in3_input.dev_attr.attr,
	&sensor_dev_attr_in4_input.dev_attr.attr,
	NULL
};

static const struct attribute_group fts_voltage_attr_group = {
	.attrs = fts_voltage_attrs
};

static const struct attribute_group fts_temp_attr_group = {
	.attrs = fts_temp_attrs
};

static const struct attribute_group fts_fan_attr_group = {
	.attrs = fts_fan_attrs
};

static const struct attribute_group *fts_attr_groups[] = {
	&fts_voltage_attr_group,
	&fts_temp_attr_group,
	&fts_fan_attr_group,
	NULL
};

/*****************************************************************************/
/* Module initialization / remove functions				     */
/*****************************************************************************/
static int fts_detect(struct i2c_client *client,
		      struct i2c_board_info *info)
{
	int val;

	/* detection works with revsion greater or equal to 0x2b */
	val = i2c_smbus_read_byte_data(client, FTS_DEVICE_REVISION_REG);
	if (val < 0x2b)
		return -ENODEV;

	/* Device Detect Regs must have 0x17 0x34 and 0x54 */
	val = i2c_smbus_read_byte_data(client, FTS_DEVICE_DETECT_REG_1);
	if (val != 0x17)
		return -ENODEV;

	val = i2c_smbus_read_byte_data(client, FTS_DEVICE_DETECT_REG_2);
	if (val != 0x34)
		return -ENODEV;

	val = i2c_smbus_read_byte_data(client, FTS_DEVICE_DETECT_REG_3);
	if (val != 0x54)
		return -ENODEV;

	/*
	 * 0x10 == Baseboard Management Controller, 0x01 == Teutates
	 * Device ID Reg needs to be 0x11
	 */
	val = i2c_smbus_read_byte_data(client, FTS_DEVICE_ID_REG);
	if (val != 0x11)
		return -ENODEV;

	strlcpy(info->type, fts_id[0].name, I2C_NAME_SIZE);
	info->flags = 0;
	return 0;
}

static int fts_remove(struct i2c_client *client)
{
	struct fts_data *data = dev_get_drvdata(&client->dev);

	watchdog_unregister_device(&data->wdd);
	return 0;
}

static int fts_probe(struct i2c_client *client, const struct i2c_device_id *id)
{
	u8 revision;
	struct fts_data *data;
	int err;
	s8 deviceid;
	struct device *hwmon_dev;

	if (client->addr != 0x73)
		return -ENODEV;

	/* Baseboard Management Controller check */
	deviceid = i2c_smbus_read_byte_data(client, FTS_DEVICE_ID_REG);
	if (deviceid > 0 && (deviceid & 0xF0) == 0x10) {
		switch (deviceid & 0x0F) {
		case 0x01:
			break;
		default:
			dev_dbg(&client->dev,
				"No Baseboard Management Controller\n");
			return -ENODEV;
		}
	} else {
		dev_dbg(&client->dev, "No fujitsu board\n");
		return -ENODEV;
	}

	data = devm_kzalloc(&client->dev, sizeof(struct fts_data),
			    GFP_KERNEL);
	if (!data)
		return -ENOMEM;

	mutex_init(&data->update_lock);
	mutex_init(&data->access_lock);
	data->client = client;
	dev_set_drvdata(&client->dev, data);

	err = i2c_smbus_read_byte_data(client, FTS_DEVICE_REVISION_REG);
	if (err < 0)
		return err;
	revision = err;

	hwmon_dev = devm_hwmon_device_register_with_groups(&client->dev,
							   "ftsteutates",
							   data,
							   fts_attr_groups);
	if (IS_ERR(hwmon_dev))
		return PTR_ERR(hwmon_dev);

	err = fts_watchdog_init(data);
	if (err)
		return err;

	dev_info(&client->dev, "Detected FTS Teutates chip, revision: %d.%d\n",
		 (revision & 0xF0) >> 4, revision & 0x0F);
	return 0;
}

/*****************************************************************************/
/* Module Details							     */
/*****************************************************************************/
static struct i2c_driver fts_driver = {
	.class = I2C_CLASS_HWMON,
	.driver = {
		.name = "ftsteutates",
	},
	.id_table = fts_id,
	.probe = fts_probe,
	.remove = fts_remove,
	.detect = fts_detect,
	.address_list = normal_i2c,
};

module_i2c_driver(fts_driver);

MODULE_AUTHOR("Thilo Cestonaro <thilo.cestonaro@ts.fujitsu.com>");
MODULE_DESCRIPTION("FTS Teutates driver");
MODULE_LICENSE("GPL");