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1// SPDX-License-Identifier: GPL-2.0-or-later
2/*
3 * gl520sm.c - Part of lm_sensors, Linux kernel modules for hardware
4 * monitoring
5 * Copyright (c) 1998, 1999 Frodo Looijaard <frodol@dds.nl>,
6 * Kyösti Mälkki <kmalkki@cc.hut.fi>
7 * Copyright (c) 2005 Maarten Deprez <maartendeprez@users.sourceforge.net>
8 */
9
10#include <linux/module.h>
11#include <linux/init.h>
12#include <linux/slab.h>
13#include <linux/jiffies.h>
14#include <linux/i2c.h>
15#include <linux/hwmon.h>
16#include <linux/hwmon-sysfs.h>
17#include <linux/hwmon-vid.h>
18#include <linux/err.h>
19#include <linux/mutex.h>
20#include <linux/sysfs.h>
21
22/* Type of the extra sensor */
23static unsigned short extra_sensor_type;
24module_param(extra_sensor_type, ushort, 0);
25MODULE_PARM_DESC(extra_sensor_type, "Type of extra sensor (0=autodetect, 1=temperature, 2=voltage)");
26
27/* Addresses to scan */
28static const unsigned short normal_i2c[] = { 0x2c, 0x2d, I2C_CLIENT_END };
29
30/*
31 * Many GL520 constants specified below
32 * One of the inputs can be configured as either temp or voltage.
33 * That's why _TEMP2 and _IN4 access the same register
34 */
35
36/* The GL520 registers */
37#define GL520_REG_CHIP_ID 0x00
38#define GL520_REG_REVISION 0x01
39#define GL520_REG_CONF 0x03
40#define GL520_REG_MASK 0x11
41
42#define GL520_REG_VID_INPUT 0x02
43
44static const u8 GL520_REG_IN_INPUT[] = { 0x15, 0x14, 0x13, 0x0d, 0x0e };
45static const u8 GL520_REG_IN_LIMIT[] = { 0x0c, 0x09, 0x0a, 0x0b };
46static const u8 GL520_REG_IN_MIN[] = { 0x0c, 0x09, 0x0a, 0x0b, 0x18 };
47static const u8 GL520_REG_IN_MAX[] = { 0x0c, 0x09, 0x0a, 0x0b, 0x17 };
48
49static const u8 GL520_REG_TEMP_INPUT[] = { 0x04, 0x0e };
50static const u8 GL520_REG_TEMP_MAX[] = { 0x05, 0x17 };
51static const u8 GL520_REG_TEMP_MAX_HYST[] = { 0x06, 0x18 };
52
53#define GL520_REG_FAN_INPUT 0x07
54#define GL520_REG_FAN_MIN 0x08
55#define GL520_REG_FAN_DIV 0x0f
56#define GL520_REG_FAN_OFF GL520_REG_FAN_DIV
57
58#define GL520_REG_ALARMS 0x12
59#define GL520_REG_BEEP_MASK 0x10
60#define GL520_REG_BEEP_ENABLE GL520_REG_CONF
61
62/* Client data */
63struct gl520_data {
64 struct i2c_client *client;
65 const struct attribute_group *groups[3];
66 struct mutex update_lock;
67 char valid; /* zero until the following fields are valid */
68 unsigned long last_updated; /* in jiffies */
69
70 u8 vid;
71 u8 vrm;
72 u8 in_input[5]; /* [0] = VVD */
73 u8 in_min[5]; /* [0] = VDD */
74 u8 in_max[5]; /* [0] = VDD */
75 u8 fan_input[2];
76 u8 fan_min[2];
77 u8 fan_div[2];
78 u8 fan_off;
79 u8 temp_input[2];
80 u8 temp_max[2];
81 u8 temp_max_hyst[2];
82 u8 alarms;
83 u8 beep_enable;
84 u8 beep_mask;
85 u8 alarm_mask;
86 u8 two_temps;
87};
88
89/*
90 * Registers 0x07 to 0x0c are word-sized, others are byte-sized
91 * GL520 uses a high-byte first convention
92 */
93static int gl520_read_value(struct i2c_client *client, u8 reg)
94{
95 if ((reg >= 0x07) && (reg <= 0x0c))
96 return i2c_smbus_read_word_swapped(client, reg);
97 else
98 return i2c_smbus_read_byte_data(client, reg);
99}
100
101static int gl520_write_value(struct i2c_client *client, u8 reg, u16 value)
102{
103 if ((reg >= 0x07) && (reg <= 0x0c))
104 return i2c_smbus_write_word_swapped(client, reg, value);
105 else
106 return i2c_smbus_write_byte_data(client, reg, value);
107}
108
109static struct gl520_data *gl520_update_device(struct device *dev)
110{
111 struct gl520_data *data = dev_get_drvdata(dev);
112 struct i2c_client *client = data->client;
113 int val, i;
114
115 mutex_lock(&data->update_lock);
116
117 if (time_after(jiffies, data->last_updated + 2 * HZ) || !data->valid) {
118
119 dev_dbg(&client->dev, "Starting gl520sm update\n");
120
121 data->alarms = gl520_read_value(client, GL520_REG_ALARMS);
122 data->beep_mask = gl520_read_value(client, GL520_REG_BEEP_MASK);
123 data->vid = gl520_read_value(client,
124 GL520_REG_VID_INPUT) & 0x1f;
125
126 for (i = 0; i < 4; i++) {
127 data->in_input[i] = gl520_read_value(client,
128 GL520_REG_IN_INPUT[i]);
129 val = gl520_read_value(client, GL520_REG_IN_LIMIT[i]);
130 data->in_min[i] = val & 0xff;
131 data->in_max[i] = (val >> 8) & 0xff;
132 }
133
134 val = gl520_read_value(client, GL520_REG_FAN_INPUT);
135 data->fan_input[0] = (val >> 8) & 0xff;
136 data->fan_input[1] = val & 0xff;
137
138 val = gl520_read_value(client, GL520_REG_FAN_MIN);
139 data->fan_min[0] = (val >> 8) & 0xff;
140 data->fan_min[1] = val & 0xff;
141
142 data->temp_input[0] = gl520_read_value(client,
143 GL520_REG_TEMP_INPUT[0]);
144 data->temp_max[0] = gl520_read_value(client,
145 GL520_REG_TEMP_MAX[0]);
146 data->temp_max_hyst[0] = gl520_read_value(client,
147 GL520_REG_TEMP_MAX_HYST[0]);
148
149 val = gl520_read_value(client, GL520_REG_FAN_DIV);
150 data->fan_div[0] = (val >> 6) & 0x03;
151 data->fan_div[1] = (val >> 4) & 0x03;
152 data->fan_off = (val >> 2) & 0x01;
153
154 data->alarms &= data->alarm_mask;
155
156 val = gl520_read_value(client, GL520_REG_CONF);
157 data->beep_enable = !((val >> 2) & 1);
158
159 /* Temp1 and Vin4 are the same input */
160 if (data->two_temps) {
161 data->temp_input[1] = gl520_read_value(client,
162 GL520_REG_TEMP_INPUT[1]);
163 data->temp_max[1] = gl520_read_value(client,
164 GL520_REG_TEMP_MAX[1]);
165 data->temp_max_hyst[1] = gl520_read_value(client,
166 GL520_REG_TEMP_MAX_HYST[1]);
167 } else {
168 data->in_input[4] = gl520_read_value(client,
169 GL520_REG_IN_INPUT[4]);
170 data->in_min[4] = gl520_read_value(client,
171 GL520_REG_IN_MIN[4]);
172 data->in_max[4] = gl520_read_value(client,
173 GL520_REG_IN_MAX[4]);
174 }
175
176 data->last_updated = jiffies;
177 data->valid = 1;
178 }
179
180 mutex_unlock(&data->update_lock);
181
182 return data;
183}
184
185/*
186 * Sysfs stuff
187 */
188
189static ssize_t cpu0_vid_show(struct device *dev,
190 struct device_attribute *attr, char *buf)
191{
192 struct gl520_data *data = gl520_update_device(dev);
193 return sprintf(buf, "%u\n", vid_from_reg(data->vid, data->vrm));
194}
195static DEVICE_ATTR_RO(cpu0_vid);
196
197#define VDD_FROM_REG(val) DIV_ROUND_CLOSEST((val) * 95, 4)
198#define VDD_CLAMP(val) clamp_val(val, 0, 255 * 95 / 4)
199#define VDD_TO_REG(val) DIV_ROUND_CLOSEST(VDD_CLAMP(val) * 4, 95)
200
201#define IN_FROM_REG(val) ((val) * 19)
202#define IN_CLAMP(val) clamp_val(val, 0, 255 * 19)
203#define IN_TO_REG(val) DIV_ROUND_CLOSEST(IN_CLAMP(val), 19)
204
205static ssize_t in_input_show(struct device *dev,
206 struct device_attribute *attr, char *buf)
207{
208 int n = to_sensor_dev_attr(attr)->index;
209 struct gl520_data *data = gl520_update_device(dev);
210 u8 r = data->in_input[n];
211
212 if (n == 0)
213 return sprintf(buf, "%d\n", VDD_FROM_REG(r));
214 else
215 return sprintf(buf, "%d\n", IN_FROM_REG(r));
216}
217
218static ssize_t in_min_show(struct device *dev, struct device_attribute *attr,
219 char *buf)
220{
221 int n = to_sensor_dev_attr(attr)->index;
222 struct gl520_data *data = gl520_update_device(dev);
223 u8 r = data->in_min[n];
224
225 if (n == 0)
226 return sprintf(buf, "%d\n", VDD_FROM_REG(r));
227 else
228 return sprintf(buf, "%d\n", IN_FROM_REG(r));
229}
230
231static ssize_t in_max_show(struct device *dev, struct device_attribute *attr,
232 char *buf)
233{
234 int n = to_sensor_dev_attr(attr)->index;
235 struct gl520_data *data = gl520_update_device(dev);
236 u8 r = data->in_max[n];
237
238 if (n == 0)
239 return sprintf(buf, "%d\n", VDD_FROM_REG(r));
240 else
241 return sprintf(buf, "%d\n", IN_FROM_REG(r));
242}
243
244static ssize_t in_min_store(struct device *dev, struct device_attribute *attr,
245 const char *buf, size_t count)
246{
247 struct gl520_data *data = dev_get_drvdata(dev);
248 struct i2c_client *client = data->client;
249 int n = to_sensor_dev_attr(attr)->index;
250 u8 r;
251 long v;
252 int err;
253
254 err = kstrtol(buf, 10, &v);
255 if (err)
256 return err;
257
258 mutex_lock(&data->update_lock);
259
260 if (n == 0)
261 r = VDD_TO_REG(v);
262 else
263 r = IN_TO_REG(v);
264
265 data->in_min[n] = r;
266
267 if (n < 4)
268 gl520_write_value(client, GL520_REG_IN_MIN[n],
269 (gl520_read_value(client, GL520_REG_IN_MIN[n])
270 & ~0xff) | r);
271 else
272 gl520_write_value(client, GL520_REG_IN_MIN[n], r);
273
274 mutex_unlock(&data->update_lock);
275 return count;
276}
277
278static ssize_t in_max_store(struct device *dev, struct device_attribute *attr,
279 const char *buf, size_t count)
280{
281 struct gl520_data *data = dev_get_drvdata(dev);
282 struct i2c_client *client = data->client;
283 int n = to_sensor_dev_attr(attr)->index;
284 u8 r;
285 long v;
286 int err;
287
288 err = kstrtol(buf, 10, &v);
289 if (err)
290 return err;
291
292 if (n == 0)
293 r = VDD_TO_REG(v);
294 else
295 r = IN_TO_REG(v);
296
297 mutex_lock(&data->update_lock);
298
299 data->in_max[n] = r;
300
301 if (n < 4)
302 gl520_write_value(client, GL520_REG_IN_MAX[n],
303 (gl520_read_value(client, GL520_REG_IN_MAX[n])
304 & ~0xff00) | (r << 8));
305 else
306 gl520_write_value(client, GL520_REG_IN_MAX[n], r);
307
308 mutex_unlock(&data->update_lock);
309 return count;
310}
311
312static SENSOR_DEVICE_ATTR_RO(in0_input, in_input, 0);
313static SENSOR_DEVICE_ATTR_RO(in1_input, in_input, 1);
314static SENSOR_DEVICE_ATTR_RO(in2_input, in_input, 2);
315static SENSOR_DEVICE_ATTR_RO(in3_input, in_input, 3);
316static SENSOR_DEVICE_ATTR_RO(in4_input, in_input, 4);
317static SENSOR_DEVICE_ATTR_RW(in0_min, in_min, 0);
318static SENSOR_DEVICE_ATTR_RW(in1_min, in_min, 1);
319static SENSOR_DEVICE_ATTR_RW(in2_min, in_min, 2);
320static SENSOR_DEVICE_ATTR_RW(in3_min, in_min, 3);
321static SENSOR_DEVICE_ATTR_RW(in4_min, in_min, 4);
322static SENSOR_DEVICE_ATTR_RW(in0_max, in_max, 0);
323static SENSOR_DEVICE_ATTR_RW(in1_max, in_max, 1);
324static SENSOR_DEVICE_ATTR_RW(in2_max, in_max, 2);
325static SENSOR_DEVICE_ATTR_RW(in3_max, in_max, 3);
326static SENSOR_DEVICE_ATTR_RW(in4_max, in_max, 4);
327
328#define DIV_FROM_REG(val) (1 << (val))
329#define FAN_FROM_REG(val, div) ((val) == 0 ? 0 : (480000 / ((val) << (div))))
330
331#define FAN_BASE(div) (480000 >> (div))
332#define FAN_CLAMP(val, div) clamp_val(val, FAN_BASE(div) / 255, \
333 FAN_BASE(div))
334#define FAN_TO_REG(val, div) ((val) == 0 ? 0 : \
335 DIV_ROUND_CLOSEST(480000, \
336 FAN_CLAMP(val, div) << (div)))
337
338static ssize_t fan_input_show(struct device *dev,
339 struct device_attribute *attr, char *buf)
340{
341 int n = to_sensor_dev_attr(attr)->index;
342 struct gl520_data *data = gl520_update_device(dev);
343
344 return sprintf(buf, "%d\n", FAN_FROM_REG(data->fan_input[n],
345 data->fan_div[n]));
346}
347
348static ssize_t fan_min_show(struct device *dev, struct device_attribute *attr,
349 char *buf)
350{
351 int n = to_sensor_dev_attr(attr)->index;
352 struct gl520_data *data = gl520_update_device(dev);
353
354 return sprintf(buf, "%d\n", FAN_FROM_REG(data->fan_min[n],
355 data->fan_div[n]));
356}
357
358static ssize_t fan_div_show(struct device *dev, struct device_attribute *attr,
359 char *buf)
360{
361 int n = to_sensor_dev_attr(attr)->index;
362 struct gl520_data *data = gl520_update_device(dev);
363
364 return sprintf(buf, "%d\n", DIV_FROM_REG(data->fan_div[n]));
365}
366
367static ssize_t fan1_off_show(struct device *dev,
368 struct device_attribute *attr, char *buf)
369{
370 struct gl520_data *data = gl520_update_device(dev);
371 return sprintf(buf, "%d\n", data->fan_off);
372}
373
374static ssize_t fan_min_store(struct device *dev,
375 struct device_attribute *attr, const char *buf,
376 size_t count)
377{
378 struct gl520_data *data = dev_get_drvdata(dev);
379 struct i2c_client *client = data->client;
380 int n = to_sensor_dev_attr(attr)->index;
381 u8 r;
382 unsigned long v;
383 int err;
384
385 err = kstrtoul(buf, 10, &v);
386 if (err)
387 return err;
388
389 mutex_lock(&data->update_lock);
390 r = FAN_TO_REG(v, data->fan_div[n]);
391 data->fan_min[n] = r;
392
393 if (n == 0)
394 gl520_write_value(client, GL520_REG_FAN_MIN,
395 (gl520_read_value(client, GL520_REG_FAN_MIN)
396 & ~0xff00) | (r << 8));
397 else
398 gl520_write_value(client, GL520_REG_FAN_MIN,
399 (gl520_read_value(client, GL520_REG_FAN_MIN)
400 & ~0xff) | r);
401
402 data->beep_mask = gl520_read_value(client, GL520_REG_BEEP_MASK);
403 if (data->fan_min[n] == 0)
404 data->alarm_mask &= (n == 0) ? ~0x20 : ~0x40;
405 else
406 data->alarm_mask |= (n == 0) ? 0x20 : 0x40;
407 data->beep_mask &= data->alarm_mask;
408 gl520_write_value(client, GL520_REG_BEEP_MASK, data->beep_mask);
409
410 mutex_unlock(&data->update_lock);
411 return count;
412}
413
414static ssize_t fan_div_store(struct device *dev,
415 struct device_attribute *attr, const char *buf,
416 size_t count)
417{
418 struct gl520_data *data = dev_get_drvdata(dev);
419 struct i2c_client *client = data->client;
420 int n = to_sensor_dev_attr(attr)->index;
421 u8 r;
422 unsigned long v;
423 int err;
424
425 err = kstrtoul(buf, 10, &v);
426 if (err)
427 return err;
428
429 switch (v) {
430 case 1:
431 r = 0;
432 break;
433 case 2:
434 r = 1;
435 break;
436 case 4:
437 r = 2;
438 break;
439 case 8:
440 r = 3;
441 break;
442 default:
443 dev_err(&client->dev,
444 "fan_div value %ld not supported. Choose one of 1, 2, 4 or 8!\n", v);
445 return -EINVAL;
446 }
447
448 mutex_lock(&data->update_lock);
449 data->fan_div[n] = r;
450
451 if (n == 0)
452 gl520_write_value(client, GL520_REG_FAN_DIV,
453 (gl520_read_value(client, GL520_REG_FAN_DIV)
454 & ~0xc0) | (r << 6));
455 else
456 gl520_write_value(client, GL520_REG_FAN_DIV,
457 (gl520_read_value(client, GL520_REG_FAN_DIV)
458 & ~0x30) | (r << 4));
459
460 mutex_unlock(&data->update_lock);
461 return count;
462}
463
464static ssize_t fan1_off_store(struct device *dev,
465 struct device_attribute *attr, const char *buf,
466 size_t count)
467{
468 struct gl520_data *data = dev_get_drvdata(dev);
469 struct i2c_client *client = data->client;
470 u8 r;
471 unsigned long v;
472 int err;
473
474 err = kstrtoul(buf, 10, &v);
475 if (err)
476 return err;
477
478 r = (v ? 1 : 0);
479
480 mutex_lock(&data->update_lock);
481 data->fan_off = r;
482 gl520_write_value(client, GL520_REG_FAN_OFF,
483 (gl520_read_value(client, GL520_REG_FAN_OFF)
484 & ~0x0c) | (r << 2));
485 mutex_unlock(&data->update_lock);
486 return count;
487}
488
489static SENSOR_DEVICE_ATTR_RO(fan1_input, fan_input, 0);
490static SENSOR_DEVICE_ATTR_RO(fan2_input, fan_input, 1);
491static SENSOR_DEVICE_ATTR_RW(fan1_min, fan_min, 0);
492static SENSOR_DEVICE_ATTR_RW(fan2_min, fan_min, 1);
493static SENSOR_DEVICE_ATTR_RW(fan1_div, fan_div, 0);
494static SENSOR_DEVICE_ATTR_RW(fan2_div, fan_div, 1);
495static DEVICE_ATTR_RW(fan1_off);
496
497#define TEMP_FROM_REG(val) (((val) - 130) * 1000)
498#define TEMP_CLAMP(val) clamp_val(val, -130000, 125000)
499#define TEMP_TO_REG(val) (DIV_ROUND_CLOSEST(TEMP_CLAMP(val), 1000) + 130)
500
501static ssize_t temp_input_show(struct device *dev,
502 struct device_attribute *attr, char *buf)
503{
504 int n = to_sensor_dev_attr(attr)->index;
505 struct gl520_data *data = gl520_update_device(dev);
506
507 return sprintf(buf, "%d\n", TEMP_FROM_REG(data->temp_input[n]));
508}
509
510static ssize_t temp_max_show(struct device *dev,
511 struct device_attribute *attr, char *buf)
512{
513 int n = to_sensor_dev_attr(attr)->index;
514 struct gl520_data *data = gl520_update_device(dev);
515
516 return sprintf(buf, "%d\n", TEMP_FROM_REG(data->temp_max[n]));
517}
518
519static ssize_t temp_max_hyst_show(struct device *dev,
520 struct device_attribute *attr, char *buf)
521{
522 int n = to_sensor_dev_attr(attr)->index;
523 struct gl520_data *data = gl520_update_device(dev);
524
525 return sprintf(buf, "%d\n", TEMP_FROM_REG(data->temp_max_hyst[n]));
526}
527
528static ssize_t temp_max_store(struct device *dev,
529 struct device_attribute *attr, const char *buf,
530 size_t count)
531{
532 struct gl520_data *data = dev_get_drvdata(dev);
533 struct i2c_client *client = data->client;
534 int n = to_sensor_dev_attr(attr)->index;
535 long v;
536 int err;
537
538 err = kstrtol(buf, 10, &v);
539 if (err)
540 return err;
541
542 mutex_lock(&data->update_lock);
543 data->temp_max[n] = TEMP_TO_REG(v);
544 gl520_write_value(client, GL520_REG_TEMP_MAX[n], data->temp_max[n]);
545 mutex_unlock(&data->update_lock);
546 return count;
547}
548
549static ssize_t temp_max_hyst_store(struct device *dev,
550 struct device_attribute *attr,
551 const char *buf, size_t count)
552{
553 struct gl520_data *data = dev_get_drvdata(dev);
554 struct i2c_client *client = data->client;
555 int n = to_sensor_dev_attr(attr)->index;
556 long v;
557 int err;
558
559 err = kstrtol(buf, 10, &v);
560 if (err)
561 return err;
562
563 mutex_lock(&data->update_lock);
564 data->temp_max_hyst[n] = TEMP_TO_REG(v);
565 gl520_write_value(client, GL520_REG_TEMP_MAX_HYST[n],
566 data->temp_max_hyst[n]);
567 mutex_unlock(&data->update_lock);
568 return count;
569}
570
571static SENSOR_DEVICE_ATTR_RO(temp1_input, temp_input, 0);
572static SENSOR_DEVICE_ATTR_RO(temp2_input, temp_input, 1);
573static SENSOR_DEVICE_ATTR_RW(temp1_max, temp_max, 0);
574static SENSOR_DEVICE_ATTR_RW(temp2_max, temp_max, 1);
575static SENSOR_DEVICE_ATTR_RW(temp1_max_hyst, temp_max_hyst, 0);
576static SENSOR_DEVICE_ATTR_RW(temp2_max_hyst, temp_max_hyst, 1);
577
578static ssize_t alarms_show(struct device *dev, struct device_attribute *attr,
579 char *buf)
580{
581 struct gl520_data *data = gl520_update_device(dev);
582 return sprintf(buf, "%d\n", data->alarms);
583}
584
585static ssize_t beep_enable_show(struct device *dev,
586 struct device_attribute *attr, char *buf)
587{
588 struct gl520_data *data = gl520_update_device(dev);
589 return sprintf(buf, "%d\n", data->beep_enable);
590}
591
592static ssize_t beep_mask_show(struct device *dev,
593 struct device_attribute *attr, char *buf)
594{
595 struct gl520_data *data = gl520_update_device(dev);
596 return sprintf(buf, "%d\n", data->beep_mask);
597}
598
599static ssize_t beep_enable_store(struct device *dev,
600 struct device_attribute *attr,
601 const char *buf, size_t count)
602{
603 struct gl520_data *data = dev_get_drvdata(dev);
604 struct i2c_client *client = data->client;
605 u8 r;
606 unsigned long v;
607 int err;
608
609 err = kstrtoul(buf, 10, &v);
610 if (err)
611 return err;
612
613 r = (v ? 0 : 1);
614
615 mutex_lock(&data->update_lock);
616 data->beep_enable = !r;
617 gl520_write_value(client, GL520_REG_BEEP_ENABLE,
618 (gl520_read_value(client, GL520_REG_BEEP_ENABLE)
619 & ~0x04) | (r << 2));
620 mutex_unlock(&data->update_lock);
621 return count;
622}
623
624static ssize_t beep_mask_store(struct device *dev,
625 struct device_attribute *attr, const char *buf,
626 size_t count)
627{
628 struct gl520_data *data = dev_get_drvdata(dev);
629 struct i2c_client *client = data->client;
630 unsigned long r;
631 int err;
632
633 err = kstrtoul(buf, 10, &r);
634 if (err)
635 return err;
636
637 mutex_lock(&data->update_lock);
638 r &= data->alarm_mask;
639 data->beep_mask = r;
640 gl520_write_value(client, GL520_REG_BEEP_MASK, r);
641 mutex_unlock(&data->update_lock);
642 return count;
643}
644
645static DEVICE_ATTR_RO(alarms);
646static DEVICE_ATTR_RW(beep_enable);
647static DEVICE_ATTR_RW(beep_mask);
648
649static ssize_t alarm_show(struct device *dev, struct device_attribute *attr,
650 char *buf)
651{
652 int bit_nr = to_sensor_dev_attr(attr)->index;
653 struct gl520_data *data = gl520_update_device(dev);
654
655 return sprintf(buf, "%d\n", (data->alarms >> bit_nr) & 1);
656}
657
658static SENSOR_DEVICE_ATTR_RO(in0_alarm, alarm, 0);
659static SENSOR_DEVICE_ATTR_RO(in1_alarm, alarm, 1);
660static SENSOR_DEVICE_ATTR_RO(in2_alarm, alarm, 2);
661static SENSOR_DEVICE_ATTR_RO(in3_alarm, alarm, 3);
662static SENSOR_DEVICE_ATTR_RO(temp1_alarm, alarm, 4);
663static SENSOR_DEVICE_ATTR_RO(fan1_alarm, alarm, 5);
664static SENSOR_DEVICE_ATTR_RO(fan2_alarm, alarm, 6);
665static SENSOR_DEVICE_ATTR_RO(temp2_alarm, alarm, 7);
666static SENSOR_DEVICE_ATTR_RO(in4_alarm, alarm, 7);
667
668static ssize_t beep_show(struct device *dev, struct device_attribute *attr,
669 char *buf)
670{
671 int bitnr = to_sensor_dev_attr(attr)->index;
672 struct gl520_data *data = gl520_update_device(dev);
673
674 return sprintf(buf, "%d\n", (data->beep_mask >> bitnr) & 1);
675}
676
677static ssize_t beep_store(struct device *dev, struct device_attribute *attr,
678 const char *buf, size_t count)
679{
680 struct gl520_data *data = dev_get_drvdata(dev);
681 struct i2c_client *client = data->client;
682 int bitnr = to_sensor_dev_attr(attr)->index;
683 unsigned long bit;
684
685 int err;
686
687 err = kstrtoul(buf, 10, &bit);
688 if (err)
689 return err;
690 if (bit & ~1)
691 return -EINVAL;
692
693 mutex_lock(&data->update_lock);
694 data->beep_mask = gl520_read_value(client, GL520_REG_BEEP_MASK);
695 if (bit)
696 data->beep_mask |= (1 << bitnr);
697 else
698 data->beep_mask &= ~(1 << bitnr);
699 gl520_write_value(client, GL520_REG_BEEP_MASK, data->beep_mask);
700 mutex_unlock(&data->update_lock);
701 return count;
702}
703
704static SENSOR_DEVICE_ATTR_RW(in0_beep, beep, 0);
705static SENSOR_DEVICE_ATTR_RW(in1_beep, beep, 1);
706static SENSOR_DEVICE_ATTR_RW(in2_beep, beep, 2);
707static SENSOR_DEVICE_ATTR_RW(in3_beep, beep, 3);
708static SENSOR_DEVICE_ATTR_RW(temp1_beep, beep, 4);
709static SENSOR_DEVICE_ATTR_RW(fan1_beep, beep, 5);
710static SENSOR_DEVICE_ATTR_RW(fan2_beep, beep, 6);
711static SENSOR_DEVICE_ATTR_RW(temp2_beep, beep, 7);
712static SENSOR_DEVICE_ATTR_RW(in4_beep, beep, 7);
713
714static struct attribute *gl520_attributes[] = {
715 &dev_attr_cpu0_vid.attr,
716
717 &sensor_dev_attr_in0_input.dev_attr.attr,
718 &sensor_dev_attr_in0_min.dev_attr.attr,
719 &sensor_dev_attr_in0_max.dev_attr.attr,
720 &sensor_dev_attr_in0_alarm.dev_attr.attr,
721 &sensor_dev_attr_in0_beep.dev_attr.attr,
722 &sensor_dev_attr_in1_input.dev_attr.attr,
723 &sensor_dev_attr_in1_min.dev_attr.attr,
724 &sensor_dev_attr_in1_max.dev_attr.attr,
725 &sensor_dev_attr_in1_alarm.dev_attr.attr,
726 &sensor_dev_attr_in1_beep.dev_attr.attr,
727 &sensor_dev_attr_in2_input.dev_attr.attr,
728 &sensor_dev_attr_in2_min.dev_attr.attr,
729 &sensor_dev_attr_in2_max.dev_attr.attr,
730 &sensor_dev_attr_in2_alarm.dev_attr.attr,
731 &sensor_dev_attr_in2_beep.dev_attr.attr,
732 &sensor_dev_attr_in3_input.dev_attr.attr,
733 &sensor_dev_attr_in3_min.dev_attr.attr,
734 &sensor_dev_attr_in3_max.dev_attr.attr,
735 &sensor_dev_attr_in3_alarm.dev_attr.attr,
736 &sensor_dev_attr_in3_beep.dev_attr.attr,
737
738 &sensor_dev_attr_fan1_input.dev_attr.attr,
739 &sensor_dev_attr_fan1_min.dev_attr.attr,
740 &sensor_dev_attr_fan1_div.dev_attr.attr,
741 &sensor_dev_attr_fan1_alarm.dev_attr.attr,
742 &sensor_dev_attr_fan1_beep.dev_attr.attr,
743 &dev_attr_fan1_off.attr,
744 &sensor_dev_attr_fan2_input.dev_attr.attr,
745 &sensor_dev_attr_fan2_min.dev_attr.attr,
746 &sensor_dev_attr_fan2_div.dev_attr.attr,
747 &sensor_dev_attr_fan2_alarm.dev_attr.attr,
748 &sensor_dev_attr_fan2_beep.dev_attr.attr,
749
750 &sensor_dev_attr_temp1_input.dev_attr.attr,
751 &sensor_dev_attr_temp1_max.dev_attr.attr,
752 &sensor_dev_attr_temp1_max_hyst.dev_attr.attr,
753 &sensor_dev_attr_temp1_alarm.dev_attr.attr,
754 &sensor_dev_attr_temp1_beep.dev_attr.attr,
755
756 &dev_attr_alarms.attr,
757 &dev_attr_beep_enable.attr,
758 &dev_attr_beep_mask.attr,
759 NULL
760};
761
762static const struct attribute_group gl520_group = {
763 .attrs = gl520_attributes,
764};
765
766static struct attribute *gl520_attributes_in4[] = {
767 &sensor_dev_attr_in4_input.dev_attr.attr,
768 &sensor_dev_attr_in4_min.dev_attr.attr,
769 &sensor_dev_attr_in4_max.dev_attr.attr,
770 &sensor_dev_attr_in4_alarm.dev_attr.attr,
771 &sensor_dev_attr_in4_beep.dev_attr.attr,
772 NULL
773};
774
775static struct attribute *gl520_attributes_temp2[] = {
776 &sensor_dev_attr_temp2_input.dev_attr.attr,
777 &sensor_dev_attr_temp2_max.dev_attr.attr,
778 &sensor_dev_attr_temp2_max_hyst.dev_attr.attr,
779 &sensor_dev_attr_temp2_alarm.dev_attr.attr,
780 &sensor_dev_attr_temp2_beep.dev_attr.attr,
781 NULL
782};
783
784static const struct attribute_group gl520_group_in4 = {
785 .attrs = gl520_attributes_in4,
786};
787
788static const struct attribute_group gl520_group_temp2 = {
789 .attrs = gl520_attributes_temp2,
790};
791
792
793/*
794 * Real code
795 */
796
797/* Return 0 if detection is successful, -ENODEV otherwise */
798static int gl520_detect(struct i2c_client *client, struct i2c_board_info *info)
799{
800 struct i2c_adapter *adapter = client->adapter;
801
802 if (!i2c_check_functionality(adapter, I2C_FUNC_SMBUS_BYTE_DATA |
803 I2C_FUNC_SMBUS_WORD_DATA))
804 return -ENODEV;
805
806 /* Determine the chip type. */
807 if ((gl520_read_value(client, GL520_REG_CHIP_ID) != 0x20) ||
808 ((gl520_read_value(client, GL520_REG_REVISION) & 0x7f) != 0x00) ||
809 ((gl520_read_value(client, GL520_REG_CONF) & 0x80) != 0x00)) {
810 dev_dbg(&client->dev, "Unknown chip type, skipping\n");
811 return -ENODEV;
812 }
813
814 strlcpy(info->type, "gl520sm", I2C_NAME_SIZE);
815
816 return 0;
817}
818
819/* Called when we have found a new GL520SM. */
820static void gl520_init_client(struct i2c_client *client)
821{
822 struct gl520_data *data = i2c_get_clientdata(client);
823 u8 oldconf, conf;
824
825 conf = oldconf = gl520_read_value(client, GL520_REG_CONF);
826
827 data->alarm_mask = 0xff;
828 data->vrm = vid_which_vrm();
829
830 if (extra_sensor_type == 1)
831 conf &= ~0x10;
832 else if (extra_sensor_type == 2)
833 conf |= 0x10;
834 data->two_temps = !(conf & 0x10);
835
836 /* If IRQ# is disabled, we can safely force comparator mode */
837 if (!(conf & 0x20))
838 conf &= 0xf7;
839
840 /* Enable monitoring if needed */
841 conf |= 0x40;
842
843 if (conf != oldconf)
844 gl520_write_value(client, GL520_REG_CONF, conf);
845
846 gl520_update_device(&(client->dev));
847
848 if (data->fan_min[0] == 0)
849 data->alarm_mask &= ~0x20;
850 if (data->fan_min[1] == 0)
851 data->alarm_mask &= ~0x40;
852
853 data->beep_mask &= data->alarm_mask;
854 gl520_write_value(client, GL520_REG_BEEP_MASK, data->beep_mask);
855}
856
857static int gl520_probe(struct i2c_client *client,
858 const struct i2c_device_id *id)
859{
860 struct device *dev = &client->dev;
861 struct device *hwmon_dev;
862 struct gl520_data *data;
863
864 data = devm_kzalloc(dev, sizeof(struct gl520_data), GFP_KERNEL);
865 if (!data)
866 return -ENOMEM;
867
868 i2c_set_clientdata(client, data);
869 mutex_init(&data->update_lock);
870 data->client = client;
871
872 /* Initialize the GL520SM chip */
873 gl520_init_client(client);
874
875 /* sysfs hooks */
876 data->groups[0] = &gl520_group;
877
878 if (data->two_temps)
879 data->groups[1] = &gl520_group_temp2;
880 else
881 data->groups[1] = &gl520_group_in4;
882
883 hwmon_dev = devm_hwmon_device_register_with_groups(dev, client->name,
884 data, data->groups);
885 return PTR_ERR_OR_ZERO(hwmon_dev);
886}
887
888static const struct i2c_device_id gl520_id[] = {
889 { "gl520sm", 0 },
890 { }
891};
892MODULE_DEVICE_TABLE(i2c, gl520_id);
893
894static struct i2c_driver gl520_driver = {
895 .class = I2C_CLASS_HWMON,
896 .driver = {
897 .name = "gl520sm",
898 },
899 .probe = gl520_probe,
900 .id_table = gl520_id,
901 .detect = gl520_detect,
902 .address_list = normal_i2c,
903};
904
905module_i2c_driver(gl520_driver);
906
907MODULE_AUTHOR("Frodo Looijaard <frodol@dds.nl>, "
908 "Kyösti Mälkki <kmalkki@cc.hut.fi>, "
909 "Maarten Deprez <maartendeprez@users.sourceforge.net>");
910MODULE_DESCRIPTION("GL520SM driver");
911MODULE_LICENSE("GPL");
1/*
2 * gl520sm.c - Part of lm_sensors, Linux kernel modules for hardware
3 * monitoring
4 * Copyright (c) 1998, 1999 Frodo Looijaard <frodol@dds.nl>,
5 * Kyösti Mälkki <kmalkki@cc.hut.fi>
6 * Copyright (c) 2005 Maarten Deprez <maartendeprez@users.sourceforge.net>
7 *
8 * This program is free software; you can redistribute it and/or modify
9 * it under the terms of the GNU General Public License as published by
10 * the Free Software Foundation; either version 2 of the License, or
11 * (at your option) any later version.
12 *
13 * This program is distributed in the hope that it will be useful,
14 * but WITHOUT ANY WARRANTY; without even the implied warranty of
15 * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
16 * GNU General Public License for more details.
17 *
18 * You should have received a copy of the GNU General Public License
19 * along with this program; if not, write to the Free Software
20 * Foundation, Inc., 675 Mass Ave, Cambridge, MA 02139, USA.
21 *
22 */
23
24#include <linux/module.h>
25#include <linux/init.h>
26#include <linux/slab.h>
27#include <linux/jiffies.h>
28#include <linux/i2c.h>
29#include <linux/hwmon.h>
30#include <linux/hwmon-sysfs.h>
31#include <linux/hwmon-vid.h>
32#include <linux/err.h>
33#include <linux/mutex.h>
34#include <linux/sysfs.h>
35
36/* Type of the extra sensor */
37static unsigned short extra_sensor_type;
38module_param(extra_sensor_type, ushort, 0);
39MODULE_PARM_DESC(extra_sensor_type, "Type of extra sensor (0=autodetect, 1=temperature, 2=voltage)");
40
41/* Addresses to scan */
42static const unsigned short normal_i2c[] = { 0x2c, 0x2d, I2C_CLIENT_END };
43
44/*
45 * Many GL520 constants specified below
46 * One of the inputs can be configured as either temp or voltage.
47 * That's why _TEMP2 and _IN4 access the same register
48 */
49
50/* The GL520 registers */
51#define GL520_REG_CHIP_ID 0x00
52#define GL520_REG_REVISION 0x01
53#define GL520_REG_CONF 0x03
54#define GL520_REG_MASK 0x11
55
56#define GL520_REG_VID_INPUT 0x02
57
58static const u8 GL520_REG_IN_INPUT[] = { 0x15, 0x14, 0x13, 0x0d, 0x0e };
59static const u8 GL520_REG_IN_LIMIT[] = { 0x0c, 0x09, 0x0a, 0x0b };
60static const u8 GL520_REG_IN_MIN[] = { 0x0c, 0x09, 0x0a, 0x0b, 0x18 };
61static const u8 GL520_REG_IN_MAX[] = { 0x0c, 0x09, 0x0a, 0x0b, 0x17 };
62
63static const u8 GL520_REG_TEMP_INPUT[] = { 0x04, 0x0e };
64static const u8 GL520_REG_TEMP_MAX[] = { 0x05, 0x17 };
65static const u8 GL520_REG_TEMP_MAX_HYST[] = { 0x06, 0x18 };
66
67#define GL520_REG_FAN_INPUT 0x07
68#define GL520_REG_FAN_MIN 0x08
69#define GL520_REG_FAN_DIV 0x0f
70#define GL520_REG_FAN_OFF GL520_REG_FAN_DIV
71
72#define GL520_REG_ALARMS 0x12
73#define GL520_REG_BEEP_MASK 0x10
74#define GL520_REG_BEEP_ENABLE GL520_REG_CONF
75
76/*
77 * Function declarations
78 */
79
80static int gl520_probe(struct i2c_client *client,
81 const struct i2c_device_id *id);
82static int gl520_detect(struct i2c_client *client, struct i2c_board_info *info);
83static void gl520_init_client(struct i2c_client *client);
84static int gl520_remove(struct i2c_client *client);
85static int gl520_read_value(struct i2c_client *client, u8 reg);
86static int gl520_write_value(struct i2c_client *client, u8 reg, u16 value);
87static struct gl520_data *gl520_update_device(struct device *dev);
88
89/* Driver data */
90static const struct i2c_device_id gl520_id[] = {
91 { "gl520sm", 0 },
92 { }
93};
94MODULE_DEVICE_TABLE(i2c, gl520_id);
95
96static struct i2c_driver gl520_driver = {
97 .class = I2C_CLASS_HWMON,
98 .driver = {
99 .name = "gl520sm",
100 },
101 .probe = gl520_probe,
102 .remove = gl520_remove,
103 .id_table = gl520_id,
104 .detect = gl520_detect,
105 .address_list = normal_i2c,
106};
107
108/* Client data */
109struct gl520_data {
110 struct device *hwmon_dev;
111 struct mutex update_lock;
112 char valid; /* zero until the following fields are valid */
113 unsigned long last_updated; /* in jiffies */
114
115 u8 vid;
116 u8 vrm;
117 u8 in_input[5]; /* [0] = VVD */
118 u8 in_min[5]; /* [0] = VDD */
119 u8 in_max[5]; /* [0] = VDD */
120 u8 fan_input[2];
121 u8 fan_min[2];
122 u8 fan_div[2];
123 u8 fan_off;
124 u8 temp_input[2];
125 u8 temp_max[2];
126 u8 temp_max_hyst[2];
127 u8 alarms;
128 u8 beep_enable;
129 u8 beep_mask;
130 u8 alarm_mask;
131 u8 two_temps;
132};
133
134/*
135 * Sysfs stuff
136 */
137
138static ssize_t get_cpu_vid(struct device *dev, struct device_attribute *attr,
139 char *buf)
140{
141 struct gl520_data *data = gl520_update_device(dev);
142 return sprintf(buf, "%u\n", vid_from_reg(data->vid, data->vrm));
143}
144static DEVICE_ATTR(cpu0_vid, S_IRUGO, get_cpu_vid, NULL);
145
146#define VDD_FROM_REG(val) (((val) * 95 + 2) / 4)
147#define VDD_TO_REG(val) SENSORS_LIMIT((((val) * 4 + 47) / 95), 0, 255)
148
149#define IN_FROM_REG(val) ((val) * 19)
150#define IN_TO_REG(val) SENSORS_LIMIT((((val) + 9) / 19), 0, 255)
151
152static ssize_t get_in_input(struct device *dev, struct device_attribute *attr,
153 char *buf)
154{
155 int n = to_sensor_dev_attr(attr)->index;
156 struct gl520_data *data = gl520_update_device(dev);
157 u8 r = data->in_input[n];
158
159 if (n == 0)
160 return sprintf(buf, "%d\n", VDD_FROM_REG(r));
161 else
162 return sprintf(buf, "%d\n", IN_FROM_REG(r));
163}
164
165static ssize_t get_in_min(struct device *dev, struct device_attribute *attr,
166 char *buf)
167{
168 int n = to_sensor_dev_attr(attr)->index;
169 struct gl520_data *data = gl520_update_device(dev);
170 u8 r = data->in_min[n];
171
172 if (n == 0)
173 return sprintf(buf, "%d\n", VDD_FROM_REG(r));
174 else
175 return sprintf(buf, "%d\n", IN_FROM_REG(r));
176}
177
178static ssize_t get_in_max(struct device *dev, struct device_attribute *attr,
179 char *buf)
180{
181 int n = to_sensor_dev_attr(attr)->index;
182 struct gl520_data *data = gl520_update_device(dev);
183 u8 r = data->in_max[n];
184
185 if (n == 0)
186 return sprintf(buf, "%d\n", VDD_FROM_REG(r));
187 else
188 return sprintf(buf, "%d\n", IN_FROM_REG(r));
189}
190
191static ssize_t set_in_min(struct device *dev, struct device_attribute *attr,
192 const char *buf, size_t count)
193{
194 struct i2c_client *client = to_i2c_client(dev);
195 struct gl520_data *data = i2c_get_clientdata(client);
196 int n = to_sensor_dev_attr(attr)->index;
197 u8 r;
198 long v;
199 int err;
200
201 err = kstrtol(buf, 10, &v);
202 if (err)
203 return err;
204
205 mutex_lock(&data->update_lock);
206
207 if (n == 0)
208 r = VDD_TO_REG(v);
209 else
210 r = IN_TO_REG(v);
211
212 data->in_min[n] = r;
213
214 if (n < 4)
215 gl520_write_value(client, GL520_REG_IN_MIN[n],
216 (gl520_read_value(client, GL520_REG_IN_MIN[n])
217 & ~0xff) | r);
218 else
219 gl520_write_value(client, GL520_REG_IN_MIN[n], r);
220
221 mutex_unlock(&data->update_lock);
222 return count;
223}
224
225static ssize_t set_in_max(struct device *dev, struct device_attribute *attr,
226 const char *buf, size_t count)
227{
228 struct i2c_client *client = to_i2c_client(dev);
229 struct gl520_data *data = i2c_get_clientdata(client);
230 int n = to_sensor_dev_attr(attr)->index;
231 u8 r;
232 long v;
233 int err;
234
235 err = kstrtol(buf, 10, &v);
236 if (err)
237 return err;
238
239 if (n == 0)
240 r = VDD_TO_REG(v);
241 else
242 r = IN_TO_REG(v);
243
244 mutex_lock(&data->update_lock);
245
246 data->in_max[n] = r;
247
248 if (n < 4)
249 gl520_write_value(client, GL520_REG_IN_MAX[n],
250 (gl520_read_value(client, GL520_REG_IN_MAX[n])
251 & ~0xff00) | (r << 8));
252 else
253 gl520_write_value(client, GL520_REG_IN_MAX[n], r);
254
255 mutex_unlock(&data->update_lock);
256 return count;
257}
258
259static SENSOR_DEVICE_ATTR(in0_input, S_IRUGO, get_in_input, NULL, 0);
260static SENSOR_DEVICE_ATTR(in1_input, S_IRUGO, get_in_input, NULL, 1);
261static SENSOR_DEVICE_ATTR(in2_input, S_IRUGO, get_in_input, NULL, 2);
262static SENSOR_DEVICE_ATTR(in3_input, S_IRUGO, get_in_input, NULL, 3);
263static SENSOR_DEVICE_ATTR(in4_input, S_IRUGO, get_in_input, NULL, 4);
264static SENSOR_DEVICE_ATTR(in0_min, S_IRUGO | S_IWUSR,
265 get_in_min, set_in_min, 0);
266static SENSOR_DEVICE_ATTR(in1_min, S_IRUGO | S_IWUSR,
267 get_in_min, set_in_min, 1);
268static SENSOR_DEVICE_ATTR(in2_min, S_IRUGO | S_IWUSR,
269 get_in_min, set_in_min, 2);
270static SENSOR_DEVICE_ATTR(in3_min, S_IRUGO | S_IWUSR,
271 get_in_min, set_in_min, 3);
272static SENSOR_DEVICE_ATTR(in4_min, S_IRUGO | S_IWUSR,
273 get_in_min, set_in_min, 4);
274static SENSOR_DEVICE_ATTR(in0_max, S_IRUGO | S_IWUSR,
275 get_in_max, set_in_max, 0);
276static SENSOR_DEVICE_ATTR(in1_max, S_IRUGO | S_IWUSR,
277 get_in_max, set_in_max, 1);
278static SENSOR_DEVICE_ATTR(in2_max, S_IRUGO | S_IWUSR,
279 get_in_max, set_in_max, 2);
280static SENSOR_DEVICE_ATTR(in3_max, S_IRUGO | S_IWUSR,
281 get_in_max, set_in_max, 3);
282static SENSOR_DEVICE_ATTR(in4_max, S_IRUGO | S_IWUSR,
283 get_in_max, set_in_max, 4);
284
285#define DIV_FROM_REG(val) (1 << (val))
286#define FAN_FROM_REG(val, div) ((val) == 0 ? 0 : (480000 / ((val) << (div))))
287#define FAN_TO_REG(val, div) ((val) <= 0 ? 0 : \
288 SENSORS_LIMIT((480000 + ((val) << ((div)-1))) / ((val) << (div)), 1, \
289 255))
290
291static ssize_t get_fan_input(struct device *dev, struct device_attribute *attr,
292 char *buf)
293{
294 int n = to_sensor_dev_attr(attr)->index;
295 struct gl520_data *data = gl520_update_device(dev);
296
297 return sprintf(buf, "%d\n", FAN_FROM_REG(data->fan_input[n],
298 data->fan_div[n]));
299}
300
301static ssize_t get_fan_min(struct device *dev, struct device_attribute *attr,
302 char *buf)
303{
304 int n = to_sensor_dev_attr(attr)->index;
305 struct gl520_data *data = gl520_update_device(dev);
306
307 return sprintf(buf, "%d\n", FAN_FROM_REG(data->fan_min[n],
308 data->fan_div[n]));
309}
310
311static ssize_t get_fan_div(struct device *dev, struct device_attribute *attr,
312 char *buf)
313{
314 int n = to_sensor_dev_attr(attr)->index;
315 struct gl520_data *data = gl520_update_device(dev);
316
317 return sprintf(buf, "%d\n", DIV_FROM_REG(data->fan_div[n]));
318}
319
320static ssize_t get_fan_off(struct device *dev, struct device_attribute *attr,
321 char *buf)
322{
323 struct gl520_data *data = gl520_update_device(dev);
324 return sprintf(buf, "%d\n", data->fan_off);
325}
326
327static ssize_t set_fan_min(struct device *dev, struct device_attribute *attr,
328 const char *buf, size_t count)
329{
330 struct i2c_client *client = to_i2c_client(dev);
331 struct gl520_data *data = i2c_get_clientdata(client);
332 int n = to_sensor_dev_attr(attr)->index;
333 u8 r;
334 unsigned long v;
335 int err;
336
337 err = kstrtoul(buf, 10, &v);
338 if (err)
339 return err;
340
341 mutex_lock(&data->update_lock);
342 r = FAN_TO_REG(v, data->fan_div[n]);
343 data->fan_min[n] = r;
344
345 if (n == 0)
346 gl520_write_value(client, GL520_REG_FAN_MIN,
347 (gl520_read_value(client, GL520_REG_FAN_MIN)
348 & ~0xff00) | (r << 8));
349 else
350 gl520_write_value(client, GL520_REG_FAN_MIN,
351 (gl520_read_value(client, GL520_REG_FAN_MIN)
352 & ~0xff) | r);
353
354 data->beep_mask = gl520_read_value(client, GL520_REG_BEEP_MASK);
355 if (data->fan_min[n] == 0)
356 data->alarm_mask &= (n == 0) ? ~0x20 : ~0x40;
357 else
358 data->alarm_mask |= (n == 0) ? 0x20 : 0x40;
359 data->beep_mask &= data->alarm_mask;
360 gl520_write_value(client, GL520_REG_BEEP_MASK, data->beep_mask);
361
362 mutex_unlock(&data->update_lock);
363 return count;
364}
365
366static ssize_t set_fan_div(struct device *dev, struct device_attribute *attr,
367 const char *buf, size_t count)
368{
369 struct i2c_client *client = to_i2c_client(dev);
370 struct gl520_data *data = i2c_get_clientdata(client);
371 int n = to_sensor_dev_attr(attr)->index;
372 u8 r;
373 unsigned long v;
374 int err;
375
376 err = kstrtoul(buf, 10, &v);
377 if (err)
378 return err;
379
380 switch (v) {
381 case 1:
382 r = 0;
383 break;
384 case 2:
385 r = 1;
386 break;
387 case 4:
388 r = 2;
389 break;
390 case 8:
391 r = 3;
392 break;
393 default:
394 dev_err(&client->dev,
395 "fan_div value %ld not supported. Choose one of 1, 2, 4 or 8!\n", v);
396 return -EINVAL;
397 }
398
399 mutex_lock(&data->update_lock);
400 data->fan_div[n] = r;
401
402 if (n == 0)
403 gl520_write_value(client, GL520_REG_FAN_DIV,
404 (gl520_read_value(client, GL520_REG_FAN_DIV)
405 & ~0xc0) | (r << 6));
406 else
407 gl520_write_value(client, GL520_REG_FAN_DIV,
408 (gl520_read_value(client, GL520_REG_FAN_DIV)
409 & ~0x30) | (r << 4));
410
411 mutex_unlock(&data->update_lock);
412 return count;
413}
414
415static ssize_t set_fan_off(struct device *dev, struct device_attribute *attr,
416 const char *buf, size_t count)
417{
418 struct i2c_client *client = to_i2c_client(dev);
419 struct gl520_data *data = i2c_get_clientdata(client);
420 u8 r;
421 unsigned long v;
422 int err;
423
424 err = kstrtoul(buf, 10, &v);
425 if (err)
426 return err;
427
428 r = (v ? 1 : 0);
429
430 mutex_lock(&data->update_lock);
431 data->fan_off = r;
432 gl520_write_value(client, GL520_REG_FAN_OFF,
433 (gl520_read_value(client, GL520_REG_FAN_OFF)
434 & ~0x0c) | (r << 2));
435 mutex_unlock(&data->update_lock);
436 return count;
437}
438
439static SENSOR_DEVICE_ATTR(fan1_input, S_IRUGO, get_fan_input, NULL, 0);
440static SENSOR_DEVICE_ATTR(fan2_input, S_IRUGO, get_fan_input, NULL, 1);
441static SENSOR_DEVICE_ATTR(fan1_min, S_IRUGO | S_IWUSR,
442 get_fan_min, set_fan_min, 0);
443static SENSOR_DEVICE_ATTR(fan2_min, S_IRUGO | S_IWUSR,
444 get_fan_min, set_fan_min, 1);
445static SENSOR_DEVICE_ATTR(fan1_div, S_IRUGO | S_IWUSR,
446 get_fan_div, set_fan_div, 0);
447static SENSOR_DEVICE_ATTR(fan2_div, S_IRUGO | S_IWUSR,
448 get_fan_div, set_fan_div, 1);
449static DEVICE_ATTR(fan1_off, S_IRUGO | S_IWUSR,
450 get_fan_off, set_fan_off);
451
452#define TEMP_FROM_REG(val) (((val) - 130) * 1000)
453#define TEMP_TO_REG(val) SENSORS_LIMIT(((((val) < 0 ? \
454 (val) - 500 : (val) + 500) / 1000) + 130), 0, 255)
455
456static ssize_t get_temp_input(struct device *dev, struct device_attribute *attr,
457 char *buf)
458{
459 int n = to_sensor_dev_attr(attr)->index;
460 struct gl520_data *data = gl520_update_device(dev);
461
462 return sprintf(buf, "%d\n", TEMP_FROM_REG(data->temp_input[n]));
463}
464
465static ssize_t get_temp_max(struct device *dev, struct device_attribute *attr,
466 char *buf)
467{
468 int n = to_sensor_dev_attr(attr)->index;
469 struct gl520_data *data = gl520_update_device(dev);
470
471 return sprintf(buf, "%d\n", TEMP_FROM_REG(data->temp_max[n]));
472}
473
474static ssize_t get_temp_max_hyst(struct device *dev,
475 struct device_attribute *attr, char *buf)
476{
477 int n = to_sensor_dev_attr(attr)->index;
478 struct gl520_data *data = gl520_update_device(dev);
479
480 return sprintf(buf, "%d\n", TEMP_FROM_REG(data->temp_max_hyst[n]));
481}
482
483static ssize_t set_temp_max(struct device *dev, struct device_attribute *attr,
484 const char *buf, size_t count)
485{
486 struct i2c_client *client = to_i2c_client(dev);
487 struct gl520_data *data = i2c_get_clientdata(client);
488 int n = to_sensor_dev_attr(attr)->index;
489 long v;
490 int err;
491
492 err = kstrtol(buf, 10, &v);
493 if (err)
494 return err;
495
496 mutex_lock(&data->update_lock);
497 data->temp_max[n] = TEMP_TO_REG(v);
498 gl520_write_value(client, GL520_REG_TEMP_MAX[n], data->temp_max[n]);
499 mutex_unlock(&data->update_lock);
500 return count;
501}
502
503static ssize_t set_temp_max_hyst(struct device *dev, struct device_attribute
504 *attr, const char *buf, size_t count)
505{
506 struct i2c_client *client = to_i2c_client(dev);
507 struct gl520_data *data = i2c_get_clientdata(client);
508 int n = to_sensor_dev_attr(attr)->index;
509 long v;
510 int err;
511
512 err = kstrtol(buf, 10, &v);
513 if (err)
514 return err;
515
516 mutex_lock(&data->update_lock);
517 data->temp_max_hyst[n] = TEMP_TO_REG(v);
518 gl520_write_value(client, GL520_REG_TEMP_MAX_HYST[n],
519 data->temp_max_hyst[n]);
520 mutex_unlock(&data->update_lock);
521 return count;
522}
523
524static SENSOR_DEVICE_ATTR(temp1_input, S_IRUGO, get_temp_input, NULL, 0);
525static SENSOR_DEVICE_ATTR(temp2_input, S_IRUGO, get_temp_input, NULL, 1);
526static SENSOR_DEVICE_ATTR(temp1_max, S_IRUGO | S_IWUSR,
527 get_temp_max, set_temp_max, 0);
528static SENSOR_DEVICE_ATTR(temp2_max, S_IRUGO | S_IWUSR,
529 get_temp_max, set_temp_max, 1);
530static SENSOR_DEVICE_ATTR(temp1_max_hyst, S_IRUGO | S_IWUSR,
531 get_temp_max_hyst, set_temp_max_hyst, 0);
532static SENSOR_DEVICE_ATTR(temp2_max_hyst, S_IRUGO | S_IWUSR,
533 get_temp_max_hyst, set_temp_max_hyst, 1);
534
535static ssize_t get_alarms(struct device *dev, struct device_attribute *attr,
536 char *buf)
537{
538 struct gl520_data *data = gl520_update_device(dev);
539 return sprintf(buf, "%d\n", data->alarms);
540}
541
542static ssize_t get_beep_enable(struct device *dev, struct device_attribute
543 *attr, char *buf)
544{
545 struct gl520_data *data = gl520_update_device(dev);
546 return sprintf(buf, "%d\n", data->beep_enable);
547}
548
549static ssize_t get_beep_mask(struct device *dev, struct device_attribute *attr,
550 char *buf)
551{
552 struct gl520_data *data = gl520_update_device(dev);
553 return sprintf(buf, "%d\n", data->beep_mask);
554}
555
556static ssize_t set_beep_enable(struct device *dev, struct device_attribute
557 *attr, const char *buf, size_t count)
558{
559 struct i2c_client *client = to_i2c_client(dev);
560 struct gl520_data *data = i2c_get_clientdata(client);
561 u8 r;
562 unsigned long v;
563 int err;
564
565 err = kstrtoul(buf, 10, &v);
566 if (err)
567 return err;
568
569 r = (v ? 0 : 1);
570
571 mutex_lock(&data->update_lock);
572 data->beep_enable = !r;
573 gl520_write_value(client, GL520_REG_BEEP_ENABLE,
574 (gl520_read_value(client, GL520_REG_BEEP_ENABLE)
575 & ~0x04) | (r << 2));
576 mutex_unlock(&data->update_lock);
577 return count;
578}
579
580static ssize_t set_beep_mask(struct device *dev, struct device_attribute *attr,
581 const char *buf, size_t count)
582{
583 struct i2c_client *client = to_i2c_client(dev);
584 struct gl520_data *data = i2c_get_clientdata(client);
585 unsigned long r;
586 int err;
587
588 err = kstrtoul(buf, 10, &r);
589 if (err)
590 return err;
591
592 mutex_lock(&data->update_lock);
593 r &= data->alarm_mask;
594 data->beep_mask = r;
595 gl520_write_value(client, GL520_REG_BEEP_MASK, r);
596 mutex_unlock(&data->update_lock);
597 return count;
598}
599
600static DEVICE_ATTR(alarms, S_IRUGO, get_alarms, NULL);
601static DEVICE_ATTR(beep_enable, S_IRUGO | S_IWUSR,
602 get_beep_enable, set_beep_enable);
603static DEVICE_ATTR(beep_mask, S_IRUGO | S_IWUSR,
604 get_beep_mask, set_beep_mask);
605
606static ssize_t get_alarm(struct device *dev, struct device_attribute *attr,
607 char *buf)
608{
609 int bit_nr = to_sensor_dev_attr(attr)->index;
610 struct gl520_data *data = gl520_update_device(dev);
611
612 return sprintf(buf, "%d\n", (data->alarms >> bit_nr) & 1);
613}
614
615static SENSOR_DEVICE_ATTR(in0_alarm, S_IRUGO, get_alarm, NULL, 0);
616static SENSOR_DEVICE_ATTR(in1_alarm, S_IRUGO, get_alarm, NULL, 1);
617static SENSOR_DEVICE_ATTR(in2_alarm, S_IRUGO, get_alarm, NULL, 2);
618static SENSOR_DEVICE_ATTR(in3_alarm, S_IRUGO, get_alarm, NULL, 3);
619static SENSOR_DEVICE_ATTR(temp1_alarm, S_IRUGO, get_alarm, NULL, 4);
620static SENSOR_DEVICE_ATTR(fan1_alarm, S_IRUGO, get_alarm, NULL, 5);
621static SENSOR_DEVICE_ATTR(fan2_alarm, S_IRUGO, get_alarm, NULL, 6);
622static SENSOR_DEVICE_ATTR(temp2_alarm, S_IRUGO, get_alarm, NULL, 7);
623static SENSOR_DEVICE_ATTR(in4_alarm, S_IRUGO, get_alarm, NULL, 7);
624
625static ssize_t get_beep(struct device *dev, struct device_attribute *attr,
626 char *buf)
627{
628 int bitnr = to_sensor_dev_attr(attr)->index;
629 struct gl520_data *data = gl520_update_device(dev);
630
631 return sprintf(buf, "%d\n", (data->beep_mask >> bitnr) & 1);
632}
633
634static ssize_t set_beep(struct device *dev, struct device_attribute *attr,
635 const char *buf, size_t count)
636{
637 struct i2c_client *client = to_i2c_client(dev);
638 struct gl520_data *data = i2c_get_clientdata(client);
639 int bitnr = to_sensor_dev_attr(attr)->index;
640 unsigned long bit;
641
642 int err;
643
644 err = kstrtoul(buf, 10, &bit);
645 if (err)
646 return err;
647 if (bit & ~1)
648 return -EINVAL;
649
650 mutex_lock(&data->update_lock);
651 data->beep_mask = gl520_read_value(client, GL520_REG_BEEP_MASK);
652 if (bit)
653 data->beep_mask |= (1 << bitnr);
654 else
655 data->beep_mask &= ~(1 << bitnr);
656 gl520_write_value(client, GL520_REG_BEEP_MASK, data->beep_mask);
657 mutex_unlock(&data->update_lock);
658 return count;
659}
660
661static SENSOR_DEVICE_ATTR(in0_beep, S_IRUGO | S_IWUSR, get_beep, set_beep, 0);
662static SENSOR_DEVICE_ATTR(in1_beep, S_IRUGO | S_IWUSR, get_beep, set_beep, 1);
663static SENSOR_DEVICE_ATTR(in2_beep, S_IRUGO | S_IWUSR, get_beep, set_beep, 2);
664static SENSOR_DEVICE_ATTR(in3_beep, S_IRUGO | S_IWUSR, get_beep, set_beep, 3);
665static SENSOR_DEVICE_ATTR(temp1_beep, S_IRUGO | S_IWUSR, get_beep, set_beep, 4);
666static SENSOR_DEVICE_ATTR(fan1_beep, S_IRUGO | S_IWUSR, get_beep, set_beep, 5);
667static SENSOR_DEVICE_ATTR(fan2_beep, S_IRUGO | S_IWUSR, get_beep, set_beep, 6);
668static SENSOR_DEVICE_ATTR(temp2_beep, S_IRUGO | S_IWUSR, get_beep, set_beep, 7);
669static SENSOR_DEVICE_ATTR(in4_beep, S_IRUGO | S_IWUSR, get_beep, set_beep, 7);
670
671static struct attribute *gl520_attributes[] = {
672 &dev_attr_cpu0_vid.attr,
673
674 &sensor_dev_attr_in0_input.dev_attr.attr,
675 &sensor_dev_attr_in0_min.dev_attr.attr,
676 &sensor_dev_attr_in0_max.dev_attr.attr,
677 &sensor_dev_attr_in0_alarm.dev_attr.attr,
678 &sensor_dev_attr_in0_beep.dev_attr.attr,
679 &sensor_dev_attr_in1_input.dev_attr.attr,
680 &sensor_dev_attr_in1_min.dev_attr.attr,
681 &sensor_dev_attr_in1_max.dev_attr.attr,
682 &sensor_dev_attr_in1_alarm.dev_attr.attr,
683 &sensor_dev_attr_in1_beep.dev_attr.attr,
684 &sensor_dev_attr_in2_input.dev_attr.attr,
685 &sensor_dev_attr_in2_min.dev_attr.attr,
686 &sensor_dev_attr_in2_max.dev_attr.attr,
687 &sensor_dev_attr_in2_alarm.dev_attr.attr,
688 &sensor_dev_attr_in2_beep.dev_attr.attr,
689 &sensor_dev_attr_in3_input.dev_attr.attr,
690 &sensor_dev_attr_in3_min.dev_attr.attr,
691 &sensor_dev_attr_in3_max.dev_attr.attr,
692 &sensor_dev_attr_in3_alarm.dev_attr.attr,
693 &sensor_dev_attr_in3_beep.dev_attr.attr,
694
695 &sensor_dev_attr_fan1_input.dev_attr.attr,
696 &sensor_dev_attr_fan1_min.dev_attr.attr,
697 &sensor_dev_attr_fan1_div.dev_attr.attr,
698 &sensor_dev_attr_fan1_alarm.dev_attr.attr,
699 &sensor_dev_attr_fan1_beep.dev_attr.attr,
700 &dev_attr_fan1_off.attr,
701 &sensor_dev_attr_fan2_input.dev_attr.attr,
702 &sensor_dev_attr_fan2_min.dev_attr.attr,
703 &sensor_dev_attr_fan2_div.dev_attr.attr,
704 &sensor_dev_attr_fan2_alarm.dev_attr.attr,
705 &sensor_dev_attr_fan2_beep.dev_attr.attr,
706
707 &sensor_dev_attr_temp1_input.dev_attr.attr,
708 &sensor_dev_attr_temp1_max.dev_attr.attr,
709 &sensor_dev_attr_temp1_max_hyst.dev_attr.attr,
710 &sensor_dev_attr_temp1_alarm.dev_attr.attr,
711 &sensor_dev_attr_temp1_beep.dev_attr.attr,
712
713 &dev_attr_alarms.attr,
714 &dev_attr_beep_enable.attr,
715 &dev_attr_beep_mask.attr,
716 NULL
717};
718
719static const struct attribute_group gl520_group = {
720 .attrs = gl520_attributes,
721};
722
723static struct attribute *gl520_attributes_in4[] = {
724 &sensor_dev_attr_in4_input.dev_attr.attr,
725 &sensor_dev_attr_in4_min.dev_attr.attr,
726 &sensor_dev_attr_in4_max.dev_attr.attr,
727 &sensor_dev_attr_in4_alarm.dev_attr.attr,
728 &sensor_dev_attr_in4_beep.dev_attr.attr,
729 NULL
730};
731
732static struct attribute *gl520_attributes_temp2[] = {
733 &sensor_dev_attr_temp2_input.dev_attr.attr,
734 &sensor_dev_attr_temp2_max.dev_attr.attr,
735 &sensor_dev_attr_temp2_max_hyst.dev_attr.attr,
736 &sensor_dev_attr_temp2_alarm.dev_attr.attr,
737 &sensor_dev_attr_temp2_beep.dev_attr.attr,
738 NULL
739};
740
741static const struct attribute_group gl520_group_in4 = {
742 .attrs = gl520_attributes_in4,
743};
744
745static const struct attribute_group gl520_group_temp2 = {
746 .attrs = gl520_attributes_temp2,
747};
748
749
750/*
751 * Real code
752 */
753
754/* Return 0 if detection is successful, -ENODEV otherwise */
755static int gl520_detect(struct i2c_client *client, struct i2c_board_info *info)
756{
757 struct i2c_adapter *adapter = client->adapter;
758
759 if (!i2c_check_functionality(adapter, I2C_FUNC_SMBUS_BYTE_DATA |
760 I2C_FUNC_SMBUS_WORD_DATA))
761 return -ENODEV;
762
763 /* Determine the chip type. */
764 if ((gl520_read_value(client, GL520_REG_CHIP_ID) != 0x20) ||
765 ((gl520_read_value(client, GL520_REG_REVISION) & 0x7f) != 0x00) ||
766 ((gl520_read_value(client, GL520_REG_CONF) & 0x80) != 0x00)) {
767 dev_dbg(&client->dev, "Unknown chip type, skipping\n");
768 return -ENODEV;
769 }
770
771 strlcpy(info->type, "gl520sm", I2C_NAME_SIZE);
772
773 return 0;
774}
775
776static int gl520_probe(struct i2c_client *client,
777 const struct i2c_device_id *id)
778{
779 struct gl520_data *data;
780 int err;
781
782 data = kzalloc(sizeof(struct gl520_data), GFP_KERNEL);
783 if (!data) {
784 err = -ENOMEM;
785 goto exit;
786 }
787
788 i2c_set_clientdata(client, data);
789 mutex_init(&data->update_lock);
790
791 /* Initialize the GL520SM chip */
792 gl520_init_client(client);
793
794 /* Register sysfs hooks */
795 err = sysfs_create_group(&client->dev.kobj, &gl520_group);
796 if (err)
797 goto exit_free;
798
799 if (data->two_temps)
800 err = sysfs_create_group(&client->dev.kobj, &gl520_group_temp2);
801 else
802 err = sysfs_create_group(&client->dev.kobj, &gl520_group_in4);
803
804 if (err)
805 goto exit_remove_files;
806
807 data->hwmon_dev = hwmon_device_register(&client->dev);
808 if (IS_ERR(data->hwmon_dev)) {
809 err = PTR_ERR(data->hwmon_dev);
810 goto exit_remove_files;
811 }
812
813 return 0;
814
815exit_remove_files:
816 sysfs_remove_group(&client->dev.kobj, &gl520_group);
817 sysfs_remove_group(&client->dev.kobj, &gl520_group_in4);
818 sysfs_remove_group(&client->dev.kobj, &gl520_group_temp2);
819exit_free:
820 kfree(data);
821exit:
822 return err;
823}
824
825
826/* Called when we have found a new GL520SM. */
827static void gl520_init_client(struct i2c_client *client)
828{
829 struct gl520_data *data = i2c_get_clientdata(client);
830 u8 oldconf, conf;
831
832 conf = oldconf = gl520_read_value(client, GL520_REG_CONF);
833
834 data->alarm_mask = 0xff;
835 data->vrm = vid_which_vrm();
836
837 if (extra_sensor_type == 1)
838 conf &= ~0x10;
839 else if (extra_sensor_type == 2)
840 conf |= 0x10;
841 data->two_temps = !(conf & 0x10);
842
843 /* If IRQ# is disabled, we can safely force comparator mode */
844 if (!(conf & 0x20))
845 conf &= 0xf7;
846
847 /* Enable monitoring if needed */
848 conf |= 0x40;
849
850 if (conf != oldconf)
851 gl520_write_value(client, GL520_REG_CONF, conf);
852
853 gl520_update_device(&(client->dev));
854
855 if (data->fan_min[0] == 0)
856 data->alarm_mask &= ~0x20;
857 if (data->fan_min[1] == 0)
858 data->alarm_mask &= ~0x40;
859
860 data->beep_mask &= data->alarm_mask;
861 gl520_write_value(client, GL520_REG_BEEP_MASK, data->beep_mask);
862}
863
864static int gl520_remove(struct i2c_client *client)
865{
866 struct gl520_data *data = i2c_get_clientdata(client);
867
868 hwmon_device_unregister(data->hwmon_dev);
869 sysfs_remove_group(&client->dev.kobj, &gl520_group);
870 sysfs_remove_group(&client->dev.kobj, &gl520_group_in4);
871 sysfs_remove_group(&client->dev.kobj, &gl520_group_temp2);
872
873 kfree(data);
874 return 0;
875}
876
877
878/*
879 * Registers 0x07 to 0x0c are word-sized, others are byte-sized
880 * GL520 uses a high-byte first convention
881 */
882static int gl520_read_value(struct i2c_client *client, u8 reg)
883{
884 if ((reg >= 0x07) && (reg <= 0x0c))
885 return i2c_smbus_read_word_swapped(client, reg);
886 else
887 return i2c_smbus_read_byte_data(client, reg);
888}
889
890static int gl520_write_value(struct i2c_client *client, u8 reg, u16 value)
891{
892 if ((reg >= 0x07) && (reg <= 0x0c))
893 return i2c_smbus_write_word_swapped(client, reg, value);
894 else
895 return i2c_smbus_write_byte_data(client, reg, value);
896}
897
898
899static struct gl520_data *gl520_update_device(struct device *dev)
900{
901 struct i2c_client *client = to_i2c_client(dev);
902 struct gl520_data *data = i2c_get_clientdata(client);
903 int val, i;
904
905 mutex_lock(&data->update_lock);
906
907 if (time_after(jiffies, data->last_updated + 2 * HZ) || !data->valid) {
908
909 dev_dbg(&client->dev, "Starting gl520sm update\n");
910
911 data->alarms = gl520_read_value(client, GL520_REG_ALARMS);
912 data->beep_mask = gl520_read_value(client, GL520_REG_BEEP_MASK);
913 data->vid = gl520_read_value(client,
914 GL520_REG_VID_INPUT) & 0x1f;
915
916 for (i = 0; i < 4; i++) {
917 data->in_input[i] = gl520_read_value(client,
918 GL520_REG_IN_INPUT[i]);
919 val = gl520_read_value(client, GL520_REG_IN_LIMIT[i]);
920 data->in_min[i] = val & 0xff;
921 data->in_max[i] = (val >> 8) & 0xff;
922 }
923
924 val = gl520_read_value(client, GL520_REG_FAN_INPUT);
925 data->fan_input[0] = (val >> 8) & 0xff;
926 data->fan_input[1] = val & 0xff;
927
928 val = gl520_read_value(client, GL520_REG_FAN_MIN);
929 data->fan_min[0] = (val >> 8) & 0xff;
930 data->fan_min[1] = val & 0xff;
931
932 data->temp_input[0] = gl520_read_value(client,
933 GL520_REG_TEMP_INPUT[0]);
934 data->temp_max[0] = gl520_read_value(client,
935 GL520_REG_TEMP_MAX[0]);
936 data->temp_max_hyst[0] = gl520_read_value(client,
937 GL520_REG_TEMP_MAX_HYST[0]);
938
939 val = gl520_read_value(client, GL520_REG_FAN_DIV);
940 data->fan_div[0] = (val >> 6) & 0x03;
941 data->fan_div[1] = (val >> 4) & 0x03;
942 data->fan_off = (val >> 2) & 0x01;
943
944 data->alarms &= data->alarm_mask;
945
946 val = gl520_read_value(client, GL520_REG_CONF);
947 data->beep_enable = !((val >> 2) & 1);
948
949 /* Temp1 and Vin4 are the same input */
950 if (data->two_temps) {
951 data->temp_input[1] = gl520_read_value(client,
952 GL520_REG_TEMP_INPUT[1]);
953 data->temp_max[1] = gl520_read_value(client,
954 GL520_REG_TEMP_MAX[1]);
955 data->temp_max_hyst[1] = gl520_read_value(client,
956 GL520_REG_TEMP_MAX_HYST[1]);
957 } else {
958 data->in_input[4] = gl520_read_value(client,
959 GL520_REG_IN_INPUT[4]);
960 data->in_min[4] = gl520_read_value(client,
961 GL520_REG_IN_MIN[4]);
962 data->in_max[4] = gl520_read_value(client,
963 GL520_REG_IN_MAX[4]);
964 }
965
966 data->last_updated = jiffies;
967 data->valid = 1;
968 }
969
970 mutex_unlock(&data->update_lock);
971
972 return data;
973}
974
975module_i2c_driver(gl520_driver);
976
977MODULE_AUTHOR("Frodo Looijaard <frodol@dds.nl>, "
978 "Kyösti Mälkki <kmalkki@cc.hut.fi>, "
979 "Maarten Deprez <maartendeprez@users.sourceforge.net>");
980MODULE_DESCRIPTION("GL520SM driver");
981MODULE_LICENSE("GPL");