summaryrefslogtreecommitdiffstats
path: root/drivers/hwmon/fscher.c
blob: c7caa95c643b452ceb31aba67d836e54dcbf0bc7 (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
/*
 * fscher.c - Part of lm_sensors, Linux kernel modules for hardware
 * monitoring
 * Copyright (C) 2003, 2004 Reinhard Nissl <rnissl@gmx.de>
 * 
 * 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.
 * 
 * You should have received a copy of the GNU General Public License
 * along with this program; if not, write to the Free Software
 * Foundation, Inc., 675 Mass Ave, Cambridge, MA 02139, USA.
 */

/* 
 *  fujitsu siemens hermes chip, 
 *  module based on fscpos.c 
 *  Copyright (C) 2000 Hermann Jung <hej@odn.de>
 *  Copyright (C) 1998, 1999 Frodo Looijaard <frodol@dds.nl>
 *  and Philip Edelbrock <phil@netroedge.com>
 */

#include <linux/module.h>
#include <linux/init.h>
#include <linux/slab.h>
#include <linux/jiffies.h>
#include <linux/i2c.h>
#include <linux/i2c-sensor.h>
#include <linux/hwmon.h>
#include <linux/err.h>

/*
 * Addresses to scan
 */

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

/*
 * Insmod parameters
 */

SENSORS_INSMOD_1(fscher);

/*
 * The FSCHER registers
 */

/* chip identification */
#define FSCHER_REG_IDENT_0		0x00
#define FSCHER_REG_IDENT_1		0x01
#define FSCHER_REG_IDENT_2		0x02
#define FSCHER_REG_REVISION		0x03

/* global control and status */
#define FSCHER_REG_EVENT_STATE		0x04
#define FSCHER_REG_CONTROL		0x05

/* watchdog */
#define FSCHER_REG_WDOG_PRESET		0x28
#define FSCHER_REG_WDOG_STATE		0x23
#define FSCHER_REG_WDOG_CONTROL		0x21

/* fan 0 */
#define FSCHER_REG_FAN0_MIN		0x55
#define FSCHER_REG_FAN0_ACT		0x0e
#define FSCHER_REG_FAN0_STATE		0x0d
#define FSCHER_REG_FAN0_RIPPLE		0x0f

/* fan 1 */
#define FSCHER_REG_FAN1_MIN		0x65
#define FSCHER_REG_FAN1_ACT		0x6b
#define FSCHER_REG_FAN1_STATE		0x62
#define FSCHER_REG_FAN1_RIPPLE		0x6f

/* fan 2 */
#define FSCHER_REG_FAN2_MIN		0xb5
#define FSCHER_REG_FAN2_ACT		0xbb
#define FSCHER_REG_FAN2_STATE		0xb2
#define FSCHER_REG_FAN2_RIPPLE		0xbf

/* voltage supervision */
#define FSCHER_REG_VOLT_12		0x45
#define FSCHER_REG_VOLT_5		0x42
#define FSCHER_REG_VOLT_BATT		0x48

/* temperature 0 */
#define FSCHER_REG_TEMP0_ACT		0x64
#define FSCHER_REG_TEMP0_STATE		0x71

/* temperature 1 */
#define FSCHER_REG_TEMP1_ACT		0x32
#define FSCHER_REG_TEMP1_STATE		0x81

/* temperature 2 */
#define FSCHER_REG_TEMP2_ACT		0x35
#define FSCHER_REG_TEMP2_STATE		0x91

/*
 * Functions declaration
 */

static int fscher_attach_adapter(struct i2c_adapter *adapter);
static int fscher_detect(struct i2c_adapter *adapter, int address, int kind);
static int fscher_detach_client(struct i2c_client *client);
static struct fscher_data *fscher_update_device(struct device *dev);
static void fscher_init_client(struct i2c_client *client);

static int fscher_read_value(struct i2c_client *client, u8 reg);
static int fscher_write_value(struct i2c_client *client, u8 reg, u8 value);

/*
 * Driver data (common to all clients)
 */
 
static struct i2c_driver fscher_driver = {
	.owner		= THIS_MODULE,
	.name		= "fscher",
	.id		= I2C_DRIVERID_FSCHER,
	.flags		= I2C_DF_NOTIFY,
	.attach_adapter	= fscher_attach_adapter,
	.detach_client	= fscher_detach_client,
};

/*
 * Client data (each client gets its own)
 */

struct fscher_data {
	struct i2c_client client;
	struct class_device *class_dev;
	struct semaphore update_lock;
	char valid; /* zero until following fields are valid */
	unsigned long last_updated; /* in jiffies */

	/* register values */
	u8 revision;		/* revision of chip */
	u8 global_event;	/* global event status */
	u8 global_control;	/* global control register */
	u8 watchdog[3];		/* watchdog */
	u8 volt[3];		/* 12, 5, battery voltage */ 
	u8 temp_act[3];		/* temperature */
	u8 temp_status[3];	/* status of sensor */
	u8 fan_act[3];		/* fans revolutions per second */
	u8 fan_status[3];	/* fan status */
	u8 fan_min[3];		/* fan min value for rps */
	u8 fan_ripple[3];	/* divider for rps */
};

/*
 * Sysfs stuff
 */

#define sysfs_r(kind, sub, offset, reg) \
static ssize_t show_##kind##sub (struct fscher_data *, char *, int); \
static ssize_t show_##kind##offset##sub (struct device *, struct device_attribute *attr, char *); \
static ssize_t show_##kind##offset##sub (struct device *dev, struct device_attribute *attr, char *buf) \
{ \
	struct fscher_data *data = fscher_update_device(dev); \
	return show_##kind##sub(data, buf, (offset)); \
}

#define sysfs_w(kind, sub, offset, reg) \
static ssize_t set_##kind##sub (struct i2c_client *, struct fscher_data *, const char *, size_t, int, int); \
static ssize_t set_##kind##offset##sub (struct device *, struct device_attribute *attr, const char *, size_t); \
static ssize_t set_##kind##offset##sub (struct device *dev, struct device_attribute *attr, const char *buf, size_t count) \
{ \
	struct i2c_client *client = to_i2c_client(dev); \
	struct fscher_data *data = i2c_get_clientdata(client); \
	return set_##kind##sub(client, data, buf, count, (offset), reg); \
}

#define sysfs_rw_n(kind, sub, offset, reg) \
sysfs_r(kind, sub, offset, reg) \
sysfs_w(kind, sub, offset, reg) \
static DEVICE_ATTR(kind##offset##sub, S_IRUGO | S_IWUSR, show_##kind##offset##sub, set_##kind##offset##sub);

#define sysfs_rw(kind, sub, reg) \
sysfs_r(kind, sub, 0, reg) \
sysfs_w(kind, sub, 0, reg) \
static DEVICE_ATTR(kind##sub, S_IRUGO | S_IWUSR, show_##kind##0##sub, set_##kind##0##sub);

#define sysfs_ro_n(kind, sub, offset, reg) \
sysfs_r(kind, sub, offset, reg) \
static DEVICE_ATTR(kind##offset##sub, S_IRUGO, show_##kind##offset##sub, NULL);

#define sysfs_ro(kind, sub, reg) \
sysfs_r(kind, sub, 0, reg) \
static DEVICE_ATTR(kind, S_IRUGO, show_##kind##0##sub, NULL);

#define sysfs_fan(offset, reg_status, reg_min, reg_ripple, reg_act) \
sysfs_rw_n(pwm,        , offset, reg_min) \
sysfs_rw_n(fan, _status, offset, reg_status) \
sysfs_rw_n(fan, _div   , offset, reg_ripple) \
sysfs_ro_n(fan, _input , offset, reg_act)

#define sysfs_temp(offset, reg_status, reg_act) \
sysfs_rw_n(temp, _status, offset, reg_status) \
sysfs_ro_n(temp, _input , offset, reg_act)
    
#define sysfs_in(offset, reg_act) \
sysfs_ro_n(in, _input, offset, reg_act)

#define sysfs_revision(reg_revision) \
sysfs_ro(revision, , reg_revision)

#define sysfs_alarms(reg_events) \
sysfs_ro(alarms, , reg_events)

#define sysfs_control(reg_control) \
sysfs_rw(control, , reg_control)

#define sysfs_watchdog(reg_control, reg_status, reg_preset) \
sysfs_rw(watchdog, _control, reg_control) \
sysfs_rw(watchdog, _status , reg_status) \
sysfs_rw(watchdog, _preset , reg_preset)

sysfs_fan(1, FSCHER_REG_FAN0_STATE, FSCHER_REG_FAN0_MIN,
	     FSCHER_REG_FAN0_RIPPLE, FSCHER_REG_FAN0_ACT)
sysfs_fan(2, FSCHER_REG_FAN1_STATE, FSCHER_REG_FAN1_MIN,
	     FSCHER_REG_FAN1_RIPPLE, FSCHER_REG_FAN1_ACT)
sysfs_fan(3, FSCHER_REG_FAN2_STATE, FSCHER_REG_FAN2_MIN,
	     FSCHER_REG_FAN2_RIPPLE, FSCHER_REG_FAN2_ACT)

sysfs_temp(1, FSCHER_REG_TEMP0_STATE, FSCHER_REG_TEMP0_ACT)
sysfs_temp(2, FSCHER_REG_TEMP1_STATE, FSCHER_REG_TEMP1_ACT)
sysfs_temp(3, FSCHER_REG_TEMP2_STATE, FSCHER_REG_TEMP2_ACT)

sysfs_in(0, FSCHER_REG_VOLT_12)
sysfs_in(1, FSCHER_REG_VOLT_5)
sysfs_in(2, FSCHER_REG_VOLT_BATT)

sysfs_revision(FSCHER_REG_REVISION)
sysfs_alarms(FSCHER_REG_EVENTS)
sysfs_control(FSCHER_REG_CONTROL)
sysfs_watchdog(FSCHER_REG_WDOG_CONTROL, FSCHER_REG_WDOG_STATE, FSCHER_REG_WDOG_PRESET)
  
#define device_create_file_fan(client, offset) \
do { \
	device_create_file(&client->dev, &dev_attr_fan##offset##_status); \
	device_create_file(&client->dev, &dev_attr_pwm##offset); \
	device_create_file(&client->dev, &dev_attr_fan##offset##_div); \
	device_create_file(&client->dev, &dev_attr_fan##offset##_input); \
} while (0)

#define device_create_file_temp(client, offset) \
do { \
	device_create_file(&client->dev, &dev_attr_temp##offset##_status); \
	device_create_file(&client->dev, &dev_attr_temp##offset##_input); \
} while (0)

#define device_create_file_in(client, offset) \
do { \
	device_create_file(&client->dev, &dev_attr_in##offset##_input); \
} while (0)

#define device_create_file_revision(client) \
do { \
	device_create_file(&client->dev, &dev_attr_revision); \
} while (0)

#define device_create_file_alarms(client) \
do { \
	device_create_file(&client->dev, &dev_attr_alarms); \
} while (0)

#define device_create_file_control(client) \
do { \
	device_create_file(&client->dev, &dev_attr_control); \
} while (0)

#define device_create_file_watchdog(client) \
do { \
	device_create_file(&client->dev, &dev_attr_watchdog_status); \
	device_create_file(&client->dev, &dev_attr_watchdog_control); \
	device_create_file(&client->dev, &dev_attr_watchdog_preset); \
} while (0)
  
/*
 * Real code
 */

static int fscher_attach_adapter(struct i2c_adapter *adapter)
{
	if (!(adapter->class & I2C_CLASS_HWMON))
		return 0;
	return i2c_detect(adapter, &addr_data, fscher_detect);
}

static int fscher_detect(struct i2c_adapter *adapter, int address, int kind)
{
	struct i2c_client *new_client;
	struct fscher_data *data;
	int err = 0;

	if (!i2c_check_functionality(adapter, I2C_FUNC_SMBUS_BYTE_DATA))
		goto exit;

	/* OK. For now, we presume we have a valid client. We now create the
	 * client structure, even though we cannot fill it completely yet.
	 * But it allows us to access i2c_smbus_read_byte_data. */
	if (!(data = kmalloc(sizeof(struct fscher_data), GFP_KERNEL))) {
		err = -ENOMEM;
		goto exit;
  	}
	memset(data, 0, sizeof(struct fscher_data));

	/* The common I2C client data is placed right before the
	 * Hermes-specific data. */
	new_client = &data->client;
	i2c_set_clientdata(new_client, data);
	new_client->addr = address;
	new_client->adapter = adapter;
	new_client->driver = &fscher_driver;
	new_client->flags = 0;

	/* Do the remaining detection unless force or force_fscher parameter */
	if (kind < 0) {
		if ((i2c_smbus_read_byte_data(new_client,
		     FSCHER_REG_IDENT_0) != 0x48)	/* 'H' */
		 || (i2c_smbus_read_byte_data(new_client,
		     FSCHER_REG_IDENT_1) != 0x45)	/* 'E' */
		 || (i2c_smbus_read_byte_data(new_client,
		     FSCHER_REG_IDENT_2) != 0x52))	/* 'R' */
			goto exit_free;
	}

	/* Fill in the remaining client fields and put it into the
	 * global list */
	strlcpy(new_client->name, "fscher", I2C_NAME_SIZE);
	data->valid = 0;
	init_MUTEX(&data->update_lock);

	/* Tell the I2C layer a new client has arrived */
	if ((err = i2c_attach_client(new_client)))
		goto exit_free;

	fscher_init_client(new_client);

	/* Register sysfs hooks */
	data->class_dev = hwmon_device_register(&new_client->dev);
	if (IS_ERR(data->class_dev)) {
		err = PTR_ERR(data->class_dev);
		goto exit_detach;
	}

	device_create_file_revision(new_client);
	device_create_file_alarms(new_client);
	device_create_file_control(new_client);
	device_create_file_watchdog(new_client);

	device_create_file_in(new_client, 0);
	device_create_file_in(new_client, 1);
	device_create_file_in(new_client, 2);

	device_create_file_fan(new_client, 1);
	device_create_file_fan(new_client, 2);
	device_create_file_fan(new_client, 3);

	device_create_file_temp(new_client, 1);
	device_create_file_temp(new_client, 2);
	device_create_file_temp(new_client, 3);

	return 0;

exit_detach:
	i2c_detach_client(new_client);
exit_free:
	kfree(data);
exit:
	return err;
}

static int fscher_detach_client(struct i2c_client *client)
{
	struct fscher_data *data = i2c_get_clientdata(client);
	int err;

	hwmon_device_unregister(data->class_dev);

	if ((err = i2c_detach_client(client))) {
		dev_err(&client->dev, "Client deregistration failed, "
			"client not detached.\n");
		return err;
	}

	kfree(data);
	return 0;
}

static int fscher_read_value(struct i2c_client *client, u8 reg)
{
	dev_dbg(&client->dev, "read reg 0x%02x\n", reg);

	return i2c_smbus_read_byte_data(client, reg);
}

static int fscher_write_value(struct i2c_client *client, u8 reg, u8 value)
{
	dev_dbg(&client->dev, "write reg 0x%02x, val 0x%02x\n",
		reg, value);

	return i2c_smbus_write_byte_data(client, reg, value);
}

/* Called when we have found a new FSC Hermes. */
static void fscher_init_client(struct i2c_client *client)
{
	struct fscher_data *data = i2c_get_clientdata(client);

	/* Read revision from chip */
	data->revision =  fscher_read_value(client, FSCHER_REG_REVISION);
}

static struct fscher_data *fscher_update_device(struct device *dev)
{
	struct i2c_client *client = to_i2c_client(dev);
	struct fscher_data *data = i2c_get_clientdata(client);

	down(&data->update_lock);

	if (time_after(jiffies, data->last_updated + 2 * HZ) || !data->valid) {

		dev_dbg(&client->dev, "Starting fscher update\n");

		data->temp_act[0] = fscher_read_value(client, FSCHER_REG_TEMP0_ACT);
		data->temp_act[1] = fscher_read_value(client, FSCHER_REG_TEMP1_ACT);
		data->temp_act[2] = fscher_read_value(client, FSCHER_REG_TEMP2_ACT);
		data->temp_status[0] = fscher_read_value(client, FSCHER_REG_TEMP0_STATE);
		data->temp_status[1] = fscher_read_value(client, FSCHER_REG_TEMP1_STATE);
		data->temp_status[2] = fscher_read_value(client, FSCHER_REG_TEMP2_STATE);

		data->volt[0] = fscher_read_value(client, FSCHER_REG_VOLT_12);
		data->volt[1] = fscher_read_value(client, FSCHER_REG_VOLT_5);
		data->volt[2] = fscher_read_value(client, FSCHER_REG_VOLT_BATT);

		data->fan_act[0] = fscher_read_value(client, FSCHER_REG_FAN0_ACT);
		data->fan_act[1] = fscher_read_value(client, FSCHER_REG_FAN1_ACT);
		data->fan_act[2] = fscher_read_value(client, FSCHER_REG_FAN2_ACT);
		data->fan_status[0] = fscher_read_value(client, FSCHER_REG_FAN0_STATE);
		data->fan_status[1] = fscher_read_value(client, FSCHER_REG_FAN1_STATE);
		data->fan_status[2] = fscher_read_value(client, FSCHER_REG_FAN2_STATE);
		data->fan_min[0] = fscher_read_value(client, FSCHER_REG_FAN0_MIN);
		data->fan_min[1] = fscher_read_value(client, FSCHER_REG_FAN1_MIN);
		data->fan_min[2] = fscher_read_value(client, FSCHER_REG_FAN2_MIN);
		data->fan_ripple[0] = fscher_read_value(client, FSCHER_REG_FAN0_RIPPLE);
		data->fan_ripple[1] = fscher_read_value(client, FSCHER_REG_FAN1_RIPPLE);
		data->fan_ripple[2] = fscher_read_value(client, FSCHER_REG_FAN2_RIPPLE);

		data->watchdog[0] = fscher_read_value(client, FSCHER_REG_WDOG_PRESET);
		data->watchdog[1] = fscher_read_value(client, FSCHER_REG_WDOG_STATE);
		data->watchdog[2] = fscher_read_value(client, FSCHER_REG_WDOG_CONTROL);

		data->global_event = fscher_read_value(client, FSCHER_REG_EVENT_STATE);

		data->last_updated = jiffies;
		data->valid = 1;                 
	}

	up(&data->update_lock);

	return data;
}



#define FAN_INDEX_FROM_NUM(nr)	((nr) - 1)

static ssize_t set_fan_status(struct i2c_client *client, struct fscher_data *data,
			      const char *buf, size_t count, int nr, int reg)
{
	/* bits 0..1, 3..7 reserved => mask with 0x04 */  
	unsigned long v = simple_strtoul(buf, NULL, 10) & 0x04;
	
	down(&data->update_lock);
	data->fan_status[FAN_INDEX_FROM_NUM(nr)] &= ~v;
	fscher_write_value(client, reg, v);
	up(&data->update_lock);
	return count;
}

static ssize_t show_fan_status(struct fscher_data *data, char *buf, int nr)
{
	/* bits 0..1, 3..7 reserved => mask with 0x04 */  
	return sprintf(buf, "%u\n", data->fan_status[FAN_INDEX_FROM_NUM(nr)] & 0x04);
}

static ssize_t set_pwm(struct i2c_client *client, struct fscher_data *data,
		       const char *buf, size_t count, int nr, int reg)
{
	unsigned long v = simple_strtoul(buf, NULL, 10);

	down(&data->update_lock);
	data->fan_min[FAN_INDEX_FROM_NUM(nr)] = v > 0xff ? 0xff : v;
	fscher_write_value(client, reg, data->fan_min[FAN_INDEX_FROM_NUM(nr)]);
	up(&data->update_lock);
	return count;
}

static ssize_t show_pwm(struct fscher_data *data, char *buf, int nr)
{
	return sprintf(buf, "%u\n", data->fan_min[FAN_INDEX_FROM_NUM(nr)]);
}

static ssize_t set_fan_div(struct i2c_client *client, struct fscher_data *data,
			   const char *buf, size_t count, int nr, int reg)
{
	/* supported values: 2, 4, 8 */
	unsigned long v = simple_strtoul(buf, NULL, 10);

	switch (v) {
	case 2: v = 1; break;
	case 4: v = 2; break;
	case 8: v = 3; break;
	default:
		dev_err(&client->dev, "fan_div value %ld not "
			 "supported. Choose one of 2, 4 or 8!\n", v);
		return -EINVAL;
	}

	down(&data->update_lock);

	/* bits 2..7 reserved => mask with 0x03 */
	data->fan_ripple[FAN_INDEX_FROM_NUM(nr)] &= ~0x03;
	data->fan_ripple[FAN_INDEX_FROM_NUM(nr)] |= v;

	fscher_write_value(client, reg, data->fan_ripple[FAN_INDEX_FROM_NUM(nr)]);
	up(&data->update_lock);
	return count;
}

static ssize_t show_fan_div(struct fscher_data *data, char *buf, int nr)
{
	/* bits 2..7 reserved => mask with 0x03 */  
	return sprintf(buf, "%u\n", 1 << (data->fan_ripple[FAN_INDEX_FROM_NUM(nr)] & 0x03));
}

#define RPM_FROM_REG(val)	(val*60)

static ssize_t show_fan_input (struct fscher_data *data, char *buf, int nr)
{
	return sprintf(buf, "%u\n", RPM_FROM_REG(data->fan_act[FAN_INDEX_FROM_NUM(nr)]));
}



#define TEMP_INDEX_FROM_NUM(nr)		((nr) - 1)

static ssize_t set_temp_status(struct i2c_client *client, struct fscher_data *data,
			       const char *buf, size_t count, int nr, int reg)
{
	/* bits 2..7 reserved, 0 read only => mask with 0x02 */  
	unsigned long v = simple_strtoul(buf, NULL, 10) & 0x02;

	down(&data->update_lock);
	data->temp_status[TEMP_INDEX_FROM_NUM(nr)] &= ~v;
	fscher_write_value(client, reg, v);
	up(&data->update_lock);
	return count;
}

static ssize_t show_temp_status(struct fscher_data *data, char *buf, int nr)
{
	/* bits 2..7 reserved => mask with 0x03 */
	return sprintf(buf, "%u\n", data->temp_status[TEMP_INDEX_FROM_NUM(nr)] & 0x03);
}

#define TEMP_FROM_REG(val)	(((val) - 128) * 1000)

static ssize_t show_temp_input(struct fscher_data *data, char *buf, int nr)
{
	return sprintf(buf, "%d\n", TEMP_FROM_REG(data->temp_act[TEMP_INDEX_FROM_NUM(nr)]));
}

/*
 * The final conversion is specified in sensors.conf, as it depends on
 * mainboard specific values. We export the registers contents as
 * pseudo-hundredths-of-Volts (range 0V - 2.55V). Not that it makes much
 * sense per se, but it minimizes the conversions count and keeps the
 * values within a usual range.
 */
#define VOLT_FROM_REG(val)	((val) * 10)

static ssize_t show_in_input(struct fscher_data *data, char *buf, int nr)
{
	return sprintf(buf, "%u\n", VOLT_FROM_REG(data->volt[nr]));
}



static ssize_t show_revision(struct fscher_data *data, char *buf, int nr)
{
	return sprintf(buf, "%u\n", data->revision);
}



static ssize_t show_alarms(struct fscher_data *data, char *buf, int nr)
{
	/* bits 2, 5..6 reserved => mask with 0x9b */
	return sprintf(buf, "%u\n", data->global_event & 0x9b);
}



static ssize_t set_control(struct i2c_client *client, struct fscher_data *data,
			   const char *buf, size_t count, int nr, int reg)
{
	/* bits 1..7 reserved => mask with 0x01 */  
	unsigned long v = simple_strtoul(buf, NULL, 10) & 0x01;

	down(&data->update_lock);
	data->global_control &= ~v;
	fscher_write_value(client, reg, v);
	up(&data->update_lock);
	return count;
}

static ssize_t show_control(struct fscher_data *data, char *buf, int nr)
{
	/* bits 1..7 reserved => mask with 0x01 */
	return sprintf(buf, "%u\n", data->global_control & 0x01);
}



static ssize_t set_watchdog_control(struct i2c_client *client, struct
				    fscher_data *data, const char *buf, size_t count,
				    int nr, int reg)
{
	/* bits 0..3 reserved => mask with 0xf0 */  
	unsigned long v = simple_strtoul(buf, NULL, 10) & 0xf0;

	down(&data->update_lock);
	data->watchdog[2] &= ~0xf0;
	data->watchdog[2] |= v;
	fscher_write_value(client, reg, data->watchdog[2]);
	up(&data->update_lock);
	return count;
}

static ssize_t show_watchdog_control(struct fscher_data *data, char *buf, int nr)
{
	/* bits 0..3 reserved, bit 5 write only => mask with 0xd0 */
	return sprintf(buf, "%u\n", data->watchdog[2] & 0xd0);
}

static ssize_t set_watchdog_status(struct i2c_client *client, struct fscher_data *data,
				   const char *buf, size_t count, int nr, int reg)
{
	/* bits 0, 2..7 reserved => mask with 0x02 */  
	unsigned long v = simple_strtoul(buf, NULL, 10) & 0x02;

	down(&data->update_lock);
	data->watchdog[1] &= ~v;
	fscher_write_value(client, reg, v);
	up(&data->update_lock);
	return count;
}

static ssize_t show_watchdog_status(struct fscher_data *data, char *buf, int nr)
{
	/* bits 0, 2..7 reserved => mask with 0x02 */
	return sprintf(buf, "%u\n", data->watchdog[1] & 0x02);
}

static ssize_t set_watchdog_preset(struct i2c_client *client, struct fscher_data *data,
				   const char *buf, size_t count, int nr, int reg)
{
	unsigned long v = simple_strtoul(buf, NULL, 10) & 0xff;
	
	down(&data->update_lock);
	data->watchdog[0] = v;
	fscher_write_value(client, reg, data->watchdog[0]);
	up(&data->update_lock);
	return count;
}

static ssize_t show_watchdog_preset(struct fscher_data *data, char *buf, int nr)
{
	return sprintf(buf, "%u\n", data->watchdog[0]);
}

static int __init sensors_fscher_init(void)
{
	return i2c_add_driver(&fscher_driver);
}

static void __exit sensors_fscher_exit(void)
{
	i2c_del_driver(&fscher_driver);
}

MODULE_AUTHOR("Reinhard Nissl <rnissl@gmx.de>");
MODULE_DESCRIPTION("FSC Hermes driver");
MODULE_LICENSE("GPL");

module_init(sensors_fscher_init);
module_exit(sensors_fscher_exit);
OpenPOWER on IntegriCloud