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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/* Many GL520 constants specified below
45One of the inputs can be configured as either temp or voltage.
46That's why _TEMP2 and _IN4 access the same register
47*/
48
49/* The GL520 registers */
50#define GL520_REG_CHIP_ID 0x00
51#define GL520_REG_REVISION 0x01
52#define GL520_REG_CONF 0x03
53#define GL520_REG_MASK 0x11
54
55#define GL520_REG_VID_INPUT 0x02
56
57static const u8 GL520_REG_IN_INPUT[] = { 0x15, 0x14, 0x13, 0x0d, 0x0e };
58static const u8 GL520_REG_IN_LIMIT[] = { 0x0c, 0x09, 0x0a, 0x0b };
59static const u8 GL520_REG_IN_MIN[] = { 0x0c, 0x09, 0x0a, 0x0b, 0x18 };
60static const u8 GL520_REG_IN_MAX[] = { 0x0c, 0x09, 0x0a, 0x0b, 0x17 };
61
62static const u8 GL520_REG_TEMP_INPUT[] = { 0x04, 0x0e };
63static const u8 GL520_REG_TEMP_MAX[] = { 0x05, 0x17 };
64static const u8 GL520_REG_TEMP_MAX_HYST[] = { 0x06, 0x18 };
65
66#define GL520_REG_FAN_INPUT 0x07
67#define GL520_REG_FAN_MIN 0x08
68#define GL520_REG_FAN_DIV 0x0f
69#define GL520_REG_FAN_OFF GL520_REG_FAN_DIV
70
71#define GL520_REG_ALARMS 0x12
72#define GL520_REG_BEEP_MASK 0x10
73#define GL520_REG_BEEP_ENABLE GL520_REG_CONF
74
75/*
76 * Function declarations
77 */
78
79static int gl520_probe(struct i2c_client *client,
80 const struct i2c_device_id *id);
81static int gl520_detect(struct i2c_client *client, struct i2c_board_info *info);
82static void gl520_init_client(struct i2c_client *client);
83static int gl520_remove(struct i2c_client *client);
84static int gl520_read_value(struct i2c_client *client, u8 reg);
85static int gl520_write_value(struct i2c_client *client, u8 reg, u16 value);
86static struct gl520_data *gl520_update_device(struct device *dev);
87
88/* Driver data */
89static const struct i2c_device_id gl520_id[] = {
90 { "gl520sm", 0 },
91 { }
92};
93MODULE_DEVICE_TABLE(i2c, gl520_id);
94
95static struct i2c_driver gl520_driver = {
96 .class = I2C_CLASS_HWMON,
97 .driver = {
98 .name = "gl520sm",
99 },
100 .probe = gl520_probe,
101 .remove = gl520_remove,
102 .id_table = gl520_id,
103 .detect = gl520_detect,
104 .address_list = normal_i2c,
105};
106
107/* Client data */
108struct gl520_data {
109 struct device *hwmon_dev;
110 struct mutex update_lock;
111 char valid; /* zero until the following fields are valid */
112 unsigned long last_updated; /* in jiffies */
113
114 u8 vid;
115 u8 vrm;
116 u8 in_input[5]; /* [0] = VVD */
117 u8 in_min[5]; /* [0] = VDD */
118 u8 in_max[5]; /* [0] = VDD */
119 u8 fan_input[2];
120 u8 fan_min[2];
121 u8 fan_div[2];
122 u8 fan_off;
123 u8 temp_input[2];
124 u8 temp_max[2];
125 u8 temp_max_hyst[2];
126 u8 alarms;
127 u8 beep_enable;
128 u8 beep_mask;
129 u8 alarm_mask;
130 u8 two_temps;
131};
132
133/*
134 * Sysfs stuff
135 */
136
137static ssize_t get_cpu_vid(struct device *dev, struct device_attribute *attr,
138 char *buf)
139{
140 struct gl520_data *data = gl520_update_device(dev);
141 return sprintf(buf, "%u\n", vid_from_reg(data->vid, data->vrm));
142}
143static DEVICE_ATTR(cpu0_vid, S_IRUGO, get_cpu_vid, NULL);
144
145#define VDD_FROM_REG(val) (((val)*95+2)/4)
146#define VDD_TO_REG(val) (SENSORS_LIMIT((((val)*4+47)/95),0,255))
147
148#define IN_FROM_REG(val) ((val)*19)
149#define IN_TO_REG(val) (SENSORS_LIMIT((((val)+9)/19),0,255))
150
151static ssize_t get_in_input(struct device *dev, struct device_attribute *attr,
152 char *buf)
153{
154 int n = to_sensor_dev_attr(attr)->index;
155 struct gl520_data *data = gl520_update_device(dev);
156 u8 r = data->in_input[n];
157
158 if (n == 0)
159 return sprintf(buf, "%d\n", VDD_FROM_REG(r));
160 else
161 return sprintf(buf, "%d\n", IN_FROM_REG(r));
162}
163
164static ssize_t get_in_min(struct device *dev, struct device_attribute *attr,
165 char *buf)
166{
167 int n = to_sensor_dev_attr(attr)->index;
168 struct gl520_data *data = gl520_update_device(dev);
169 u8 r = data->in_min[n];
170
171 if (n == 0)
172 return sprintf(buf, "%d\n", VDD_FROM_REG(r));
173 else
174 return sprintf(buf, "%d\n", IN_FROM_REG(r));
175}
176
177static ssize_t get_in_max(struct device *dev, struct device_attribute *attr,
178 char *buf)
179{
180 int n = to_sensor_dev_attr(attr)->index;
181 struct gl520_data *data = gl520_update_device(dev);
182 u8 r = data->in_max[n];
183
184 if (n == 0)
185 return sprintf(buf, "%d\n", VDD_FROM_REG(r));
186 else
187 return sprintf(buf, "%d\n", IN_FROM_REG(r));
188}
189
190static ssize_t set_in_min(struct device *dev, struct device_attribute *attr,
191 const char *buf, size_t count)
192{
193 struct i2c_client *client = to_i2c_client(dev);
194 struct gl520_data *data = i2c_get_clientdata(client);
195 int n = to_sensor_dev_attr(attr)->index;
196 long v = simple_strtol(buf, NULL, 10);
197 u8 r;
198
199 mutex_lock(&data->update_lock);
200
201 if (n == 0)
202 r = VDD_TO_REG(v);
203 else
204 r = IN_TO_REG(v);
205
206 data->in_min[n] = r;
207
208 if (n < 4)
209 gl520_write_value(client, GL520_REG_IN_MIN[n],
210 (gl520_read_value(client, GL520_REG_IN_MIN[n])
211 & ~0xff) | r);
212 else
213 gl520_write_value(client, GL520_REG_IN_MIN[n], r);
214
215 mutex_unlock(&data->update_lock);
216 return count;
217}
218
219static ssize_t set_in_max(struct device *dev, struct device_attribute *attr,
220 const char *buf, size_t count)
221{
222 struct i2c_client *client = to_i2c_client(dev);
223 struct gl520_data *data = i2c_get_clientdata(client);
224 int n = to_sensor_dev_attr(attr)->index;
225 long v = simple_strtol(buf, NULL, 10);
226 u8 r;
227
228 if (n == 0)
229 r = VDD_TO_REG(v);
230 else
231 r = IN_TO_REG(v);
232
233 mutex_lock(&data->update_lock);
234
235 data->in_max[n] = r;
236
237 if (n < 4)
238 gl520_write_value(client, GL520_REG_IN_MAX[n],
239 (gl520_read_value(client, GL520_REG_IN_MAX[n])
240 & ~0xff00) | (r << 8));
241 else
242 gl520_write_value(client, GL520_REG_IN_MAX[n], r);
243
244 mutex_unlock(&data->update_lock);
245 return count;
246}
247
248static SENSOR_DEVICE_ATTR(in0_input, S_IRUGO, get_in_input, NULL, 0);
249static SENSOR_DEVICE_ATTR(in1_input, S_IRUGO, get_in_input, NULL, 1);
250static SENSOR_DEVICE_ATTR(in2_input, S_IRUGO, get_in_input, NULL, 2);
251static SENSOR_DEVICE_ATTR(in3_input, S_IRUGO, get_in_input, NULL, 3);
252static SENSOR_DEVICE_ATTR(in4_input, S_IRUGO, get_in_input, NULL, 4);
253static SENSOR_DEVICE_ATTR(in0_min, S_IRUGO | S_IWUSR,
254 get_in_min, set_in_min, 0);
255static SENSOR_DEVICE_ATTR(in1_min, S_IRUGO | S_IWUSR,
256 get_in_min, set_in_min, 1);
257static SENSOR_DEVICE_ATTR(in2_min, S_IRUGO | S_IWUSR,
258 get_in_min, set_in_min, 2);
259static SENSOR_DEVICE_ATTR(in3_min, S_IRUGO | S_IWUSR,
260 get_in_min, set_in_min, 3);
261static SENSOR_DEVICE_ATTR(in4_min, S_IRUGO | S_IWUSR,
262 get_in_min, set_in_min, 4);
263static SENSOR_DEVICE_ATTR(in0_max, S_IRUGO | S_IWUSR,
264 get_in_max, set_in_max, 0);
265static SENSOR_DEVICE_ATTR(in1_max, S_IRUGO | S_IWUSR,
266 get_in_max, set_in_max, 1);
267static SENSOR_DEVICE_ATTR(in2_max, S_IRUGO | S_IWUSR,
268 get_in_max, set_in_max, 2);
269static SENSOR_DEVICE_ATTR(in3_max, S_IRUGO | S_IWUSR,
270 get_in_max, set_in_max, 3);
271static SENSOR_DEVICE_ATTR(in4_max, S_IRUGO | S_IWUSR,
272 get_in_max, set_in_max, 4);
273
274#define DIV_FROM_REG(val) (1 << (val))
275#define FAN_FROM_REG(val,div) ((val)==0 ? 0 : (480000/((val) << (div))))
276#define FAN_TO_REG(val,div) ((val)<=0?0:SENSORS_LIMIT((480000 + ((val) << ((div)-1))) / ((val) << (div)), 1, 255))
277
278static ssize_t get_fan_input(struct device *dev, struct device_attribute *attr,
279 char *buf)
280{
281 int n = to_sensor_dev_attr(attr)->index;
282 struct gl520_data *data = gl520_update_device(dev);
283
284 return sprintf(buf, "%d\n", FAN_FROM_REG(data->fan_input[n],
285 data->fan_div[n]));
286}
287
288static ssize_t get_fan_min(struct device *dev, struct device_attribute *attr,
289 char *buf)
290{
291 int n = to_sensor_dev_attr(attr)->index;
292 struct gl520_data *data = gl520_update_device(dev);
293
294 return sprintf(buf, "%d\n", FAN_FROM_REG(data->fan_min[n],
295 data->fan_div[n]));
296}
297
298static ssize_t get_fan_div(struct device *dev, struct device_attribute *attr,
299 char *buf)
300{
301 int n = to_sensor_dev_attr(attr)->index;
302 struct gl520_data *data = gl520_update_device(dev);
303
304 return sprintf(buf, "%d\n", DIV_FROM_REG(data->fan_div[n]));
305}
306
307static ssize_t get_fan_off(struct device *dev, struct device_attribute *attr,
308 char *buf)
309{
310 struct gl520_data *data = gl520_update_device(dev);
311 return sprintf(buf, "%d\n", data->fan_off);
312}
313
314static ssize_t set_fan_min(struct device *dev, struct device_attribute *attr,
315 const char *buf, size_t count)
316{
317 struct i2c_client *client = to_i2c_client(dev);
318 struct gl520_data *data = i2c_get_clientdata(client);
319 int n = to_sensor_dev_attr(attr)->index;
320 unsigned long v = simple_strtoul(buf, NULL, 10);
321 u8 r;
322
323 mutex_lock(&data->update_lock);
324 r = FAN_TO_REG(v, data->fan_div[n]);
325 data->fan_min[n] = r;
326
327 if (n == 0)
328 gl520_write_value(client, GL520_REG_FAN_MIN,
329 (gl520_read_value(client, GL520_REG_FAN_MIN)
330 & ~0xff00) | (r << 8));
331 else
332 gl520_write_value(client, GL520_REG_FAN_MIN,
333 (gl520_read_value(client, GL520_REG_FAN_MIN)
334 & ~0xff) | r);
335
336 data->beep_mask = gl520_read_value(client, GL520_REG_BEEP_MASK);
337 if (data->fan_min[n] == 0)
338 data->alarm_mask &= (n == 0) ? ~0x20 : ~0x40;
339 else
340 data->alarm_mask |= (n == 0) ? 0x20 : 0x40;
341 data->beep_mask &= data->alarm_mask;
342 gl520_write_value(client, GL520_REG_BEEP_MASK, data->beep_mask);
343
344 mutex_unlock(&data->update_lock);
345 return count;
346}
347
348static ssize_t set_fan_div(struct device *dev, struct device_attribute *attr,
349 const char *buf, size_t count)
350{
351 struct i2c_client *client = to_i2c_client(dev);
352 struct gl520_data *data = i2c_get_clientdata(client);
353 int n = to_sensor_dev_attr(attr)->index;
354 unsigned long v = simple_strtoul(buf, NULL, 10);
355 u8 r;
356
357 switch (v) {
358 case 1: r = 0; break;
359 case 2: r = 1; break;
360 case 4: r = 2; break;
361 case 8: r = 3; break;
362 default:
363 dev_err(&client->dev, "fan_div value %ld not supported. Choose one of 1, 2, 4 or 8!\n", v);
364 return -EINVAL;
365 }
366
367 mutex_lock(&data->update_lock);
368 data->fan_div[n] = r;
369
370 if (n == 0)
371 gl520_write_value(client, GL520_REG_FAN_DIV,
372 (gl520_read_value(client, GL520_REG_FAN_DIV)
373 & ~0xc0) | (r << 6));
374 else
375 gl520_write_value(client, GL520_REG_FAN_DIV,
376 (gl520_read_value(client, GL520_REG_FAN_DIV)
377 & ~0x30) | (r << 4));
378
379 mutex_unlock(&data->update_lock);
380 return count;
381}
382
383static ssize_t set_fan_off(struct device *dev, struct device_attribute *attr,
384 const char *buf, size_t count)
385{
386 struct i2c_client *client = to_i2c_client(dev);
387 struct gl520_data *data = i2c_get_clientdata(client);
388 u8 r = simple_strtoul(buf, NULL, 10)?1:0;
389
390 mutex_lock(&data->update_lock);
391 data->fan_off = r;
392 gl520_write_value(client, GL520_REG_FAN_OFF,
393 (gl520_read_value(client, GL520_REG_FAN_OFF)
394 & ~0x0c) | (r << 2));
395 mutex_unlock(&data->update_lock);
396 return count;
397}
398
399static SENSOR_DEVICE_ATTR(fan1_input, S_IRUGO, get_fan_input, NULL, 0);
400static SENSOR_DEVICE_ATTR(fan2_input, S_IRUGO, get_fan_input, NULL, 1);
401static SENSOR_DEVICE_ATTR(fan1_min, S_IRUGO | S_IWUSR,
402 get_fan_min, set_fan_min, 0);
403static SENSOR_DEVICE_ATTR(fan2_min, S_IRUGO | S_IWUSR,
404 get_fan_min, set_fan_min, 1);
405static SENSOR_DEVICE_ATTR(fan1_div, S_IRUGO | S_IWUSR,
406 get_fan_div, set_fan_div, 0);
407static SENSOR_DEVICE_ATTR(fan2_div, S_IRUGO | S_IWUSR,
408 get_fan_div, set_fan_div, 1);
409static DEVICE_ATTR(fan1_off, S_IRUGO | S_IWUSR,
410 get_fan_off, set_fan_off);
411
412#define TEMP_FROM_REG(val) (((val) - 130) * 1000)
413#define TEMP_TO_REG(val) (SENSORS_LIMIT(((((val)<0?(val)-500:(val)+500) / 1000)+130),0,255))
414
415static ssize_t get_temp_input(struct device *dev, struct device_attribute *attr,
416 char *buf)
417{
418 int n = to_sensor_dev_attr(attr)->index;
419 struct gl520_data *data = gl520_update_device(dev);
420
421 return sprintf(buf, "%d\n", TEMP_FROM_REG(data->temp_input[n]));
422}
423
424static ssize_t get_temp_max(struct device *dev, struct device_attribute *attr,
425 char *buf)
426{
427 int n = to_sensor_dev_attr(attr)->index;
428 struct gl520_data *data = gl520_update_device(dev);
429
430 return sprintf(buf, "%d\n", TEMP_FROM_REG(data->temp_max[n]));
431}
432
433static ssize_t get_temp_max_hyst(struct device *dev, struct device_attribute
434 *attr, char *buf)
435{
436 int n = to_sensor_dev_attr(attr)->index;
437 struct gl520_data *data = gl520_update_device(dev);
438
439 return sprintf(buf, "%d\n", TEMP_FROM_REG(data->temp_max_hyst[n]));
440}
441
442static ssize_t set_temp_max(struct device *dev, struct device_attribute *attr,
443 const char *buf, size_t count)
444{
445 struct i2c_client *client = to_i2c_client(dev);
446 struct gl520_data *data = i2c_get_clientdata(client);
447 int n = to_sensor_dev_attr(attr)->index;
448 long v = simple_strtol(buf, NULL, 10);
449
450 mutex_lock(&data->update_lock);
451 data->temp_max[n] = TEMP_TO_REG(v);
452 gl520_write_value(client, GL520_REG_TEMP_MAX[n], data->temp_max[n]);
453 mutex_unlock(&data->update_lock);
454 return count;
455}
456
457static ssize_t set_temp_max_hyst(struct device *dev, struct device_attribute
458 *attr, const char *buf, size_t count)
459{
460 struct i2c_client *client = to_i2c_client(dev);
461 struct gl520_data *data = i2c_get_clientdata(client);
462 int n = to_sensor_dev_attr(attr)->index;
463 long v = simple_strtol(buf, NULL, 10);
464
465 mutex_lock(&data->update_lock);
466 data->temp_max_hyst[n] = TEMP_TO_REG(v);
467 gl520_write_value(client, GL520_REG_TEMP_MAX_HYST[n],
468 data->temp_max_hyst[n]);
469 mutex_unlock(&data->update_lock);
470 return count;
471}
472
473static SENSOR_DEVICE_ATTR(temp1_input, S_IRUGO, get_temp_input, NULL, 0);
474static SENSOR_DEVICE_ATTR(temp2_input, S_IRUGO, get_temp_input, NULL, 1);
475static SENSOR_DEVICE_ATTR(temp1_max, S_IRUGO | S_IWUSR,
476 get_temp_max, set_temp_max, 0);
477static SENSOR_DEVICE_ATTR(temp2_max, S_IRUGO | S_IWUSR,
478 get_temp_max, set_temp_max, 1);
479static SENSOR_DEVICE_ATTR(temp1_max_hyst, S_IRUGO | S_IWUSR,
480 get_temp_max_hyst, set_temp_max_hyst, 0);
481static SENSOR_DEVICE_ATTR(temp2_max_hyst, S_IRUGO | S_IWUSR,
482 get_temp_max_hyst, set_temp_max_hyst, 1);
483
484static ssize_t get_alarms(struct device *dev, struct device_attribute *attr,
485 char *buf)
486{
487 struct gl520_data *data = gl520_update_device(dev);
488 return sprintf(buf, "%d\n", data->alarms);
489}
490
491static ssize_t get_beep_enable(struct device *dev, struct device_attribute
492 *attr, char *buf)
493{
494 struct gl520_data *data = gl520_update_device(dev);
495 return sprintf(buf, "%d\n", data->beep_enable);
496}
497
498static ssize_t get_beep_mask(struct device *dev, struct device_attribute *attr,
499 char *buf)
500{
501 struct gl520_data *data = gl520_update_device(dev);
502 return sprintf(buf, "%d\n", data->beep_mask);
503}
504
505static ssize_t set_beep_enable(struct device *dev, struct device_attribute
506 *attr, const char *buf, size_t count)
507{
508 struct i2c_client *client = to_i2c_client(dev);
509 struct gl520_data *data = i2c_get_clientdata(client);
510 u8 r = simple_strtoul(buf, NULL, 10)?0:1;
511
512 mutex_lock(&data->update_lock);
513 data->beep_enable = !r;
514 gl520_write_value(client, GL520_REG_BEEP_ENABLE,
515 (gl520_read_value(client, GL520_REG_BEEP_ENABLE)
516 & ~0x04) | (r << 2));
517 mutex_unlock(&data->update_lock);
518 return count;
519}
520
521static ssize_t set_beep_mask(struct device *dev, struct device_attribute *attr,
522 const char *buf, size_t count)
523{
524 struct i2c_client *client = to_i2c_client(dev);
525 struct gl520_data *data = i2c_get_clientdata(client);
526 u8 r = simple_strtoul(buf, NULL, 10);
527
528 mutex_lock(&data->update_lock);
529 r &= data->alarm_mask;
530 data->beep_mask = r;
531 gl520_write_value(client, GL520_REG_BEEP_MASK, r);
532 mutex_unlock(&data->update_lock);
533 return count;
534}
535
536static DEVICE_ATTR(alarms, S_IRUGO, get_alarms, NULL);
537static DEVICE_ATTR(beep_enable, S_IRUGO | S_IWUSR,
538 get_beep_enable, set_beep_enable);
539static DEVICE_ATTR(beep_mask, S_IRUGO | S_IWUSR,
540 get_beep_mask, set_beep_mask);
541
542static ssize_t get_alarm(struct device *dev, struct device_attribute *attr,
543 char *buf)
544{
545 int bit_nr = to_sensor_dev_attr(attr)->index;
546 struct gl520_data *data = gl520_update_device(dev);
547
548 return sprintf(buf, "%d\n", (data->alarms >> bit_nr) & 1);
549}
550
551static SENSOR_DEVICE_ATTR(in0_alarm, S_IRUGO, get_alarm, NULL, 0);
552static SENSOR_DEVICE_ATTR(in1_alarm, S_IRUGO, get_alarm, NULL, 1);
553static SENSOR_DEVICE_ATTR(in2_alarm, S_IRUGO, get_alarm, NULL, 2);
554static SENSOR_DEVICE_ATTR(in3_alarm, S_IRUGO, get_alarm, NULL, 3);
555static SENSOR_DEVICE_ATTR(temp1_alarm, S_IRUGO, get_alarm, NULL, 4);
556static SENSOR_DEVICE_ATTR(fan1_alarm, S_IRUGO, get_alarm, NULL, 5);
557static SENSOR_DEVICE_ATTR(fan2_alarm, S_IRUGO, get_alarm, NULL, 6);
558static SENSOR_DEVICE_ATTR(temp2_alarm, S_IRUGO, get_alarm, NULL, 7);
559static SENSOR_DEVICE_ATTR(in4_alarm, S_IRUGO, get_alarm, NULL, 7);
560
561static ssize_t get_beep(struct device *dev, struct device_attribute *attr,
562 char *buf)
563{
564 int bitnr = to_sensor_dev_attr(attr)->index;
565 struct gl520_data *data = gl520_update_device(dev);
566
567 return sprintf(buf, "%d\n", (data->beep_mask >> bitnr) & 1);
568}
569
570static ssize_t set_beep(struct device *dev, struct device_attribute *attr,
571 const char *buf, size_t count)
572{
573 struct i2c_client *client = to_i2c_client(dev);
574 struct gl520_data *data = i2c_get_clientdata(client);
575 int bitnr = to_sensor_dev_attr(attr)->index;
576 unsigned long bit;
577
578 bit = simple_strtoul(buf, NULL, 10);
579 if (bit & ~1)
580 return -EINVAL;
581
582 mutex_lock(&data->update_lock);
583 data->beep_mask = gl520_read_value(client, GL520_REG_BEEP_MASK);
584 if (bit)
585 data->beep_mask |= (1 << bitnr);
586 else
587 data->beep_mask &= ~(1 << bitnr);
588 gl520_write_value(client, GL520_REG_BEEP_MASK, data->beep_mask);
589 mutex_unlock(&data->update_lock);
590 return count;
591}
592
593static SENSOR_DEVICE_ATTR(in0_beep, S_IRUGO | S_IWUSR, get_beep, set_beep, 0);
594static SENSOR_DEVICE_ATTR(in1_beep, S_IRUGO | S_IWUSR, get_beep, set_beep, 1);
595static SENSOR_DEVICE_ATTR(in2_beep, S_IRUGO | S_IWUSR, get_beep, set_beep, 2);
596static SENSOR_DEVICE_ATTR(in3_beep, S_IRUGO | S_IWUSR, get_beep, set_beep, 3);
597static SENSOR_DEVICE_ATTR(temp1_beep, S_IRUGO | S_IWUSR, get_beep, set_beep, 4);
598static SENSOR_DEVICE_ATTR(fan1_beep, S_IRUGO | S_IWUSR, get_beep, set_beep, 5);
599static SENSOR_DEVICE_ATTR(fan2_beep, S_IRUGO | S_IWUSR, get_beep, set_beep, 6);
600static SENSOR_DEVICE_ATTR(temp2_beep, S_IRUGO | S_IWUSR, get_beep, set_beep, 7);
601static SENSOR_DEVICE_ATTR(in4_beep, S_IRUGO | S_IWUSR, get_beep, set_beep, 7);
602
603static struct attribute *gl520_attributes[] = {
604 &dev_attr_cpu0_vid.attr,
605
606 &sensor_dev_attr_in0_input.dev_attr.attr,
607 &sensor_dev_attr_in0_min.dev_attr.attr,
608 &sensor_dev_attr_in0_max.dev_attr.attr,
609 &sensor_dev_attr_in0_alarm.dev_attr.attr,
610 &sensor_dev_attr_in0_beep.dev_attr.attr,
611 &sensor_dev_attr_in1_input.dev_attr.attr,
612 &sensor_dev_attr_in1_min.dev_attr.attr,
613 &sensor_dev_attr_in1_max.dev_attr.attr,
614 &sensor_dev_attr_in1_alarm.dev_attr.attr,
615 &sensor_dev_attr_in1_beep.dev_attr.attr,
616 &sensor_dev_attr_in2_input.dev_attr.attr,
617 &sensor_dev_attr_in2_min.dev_attr.attr,
618 &sensor_dev_attr_in2_max.dev_attr.attr,
619 &sensor_dev_attr_in2_alarm.dev_attr.attr,
620 &sensor_dev_attr_in2_beep.dev_attr.attr,
621 &sensor_dev_attr_in3_input.dev_attr.attr,
622 &sensor_dev_attr_in3_min.dev_attr.attr,
623 &sensor_dev_attr_in3_max.dev_attr.attr,
624 &sensor_dev_attr_in3_alarm.dev_attr.attr,
625 &sensor_dev_attr_in3_beep.dev_attr.attr,
626
627 &sensor_dev_attr_fan1_input.dev_attr.attr,
628 &sensor_dev_attr_fan1_min.dev_attr.attr,
629 &sensor_dev_attr_fan1_div.dev_attr.attr,
630 &sensor_dev_attr_fan1_alarm.dev_attr.attr,
631 &sensor_dev_attr_fan1_beep.dev_attr.attr,
632 &dev_attr_fan1_off.attr,
633 &sensor_dev_attr_fan2_input.dev_attr.attr,
634 &sensor_dev_attr_fan2_min.dev_attr.attr,
635 &sensor_dev_attr_fan2_div.dev_attr.attr,
636 &sensor_dev_attr_fan2_alarm.dev_attr.attr,
637 &sensor_dev_attr_fan2_beep.dev_attr.attr,
638
639 &sensor_dev_attr_temp1_input.dev_attr.attr,
640 &sensor_dev_attr_temp1_max.dev_attr.attr,
641 &sensor_dev_attr_temp1_max_hyst.dev_attr.attr,
642 &sensor_dev_attr_temp1_alarm.dev_attr.attr,
643 &sensor_dev_attr_temp1_beep.dev_attr.attr,
644
645 &dev_attr_alarms.attr,
646 &dev_attr_beep_enable.attr,
647 &dev_attr_beep_mask.attr,
648 NULL
649};
650
651static const struct attribute_group gl520_group = {
652 .attrs = gl520_attributes,
653};
654
655static struct attribute *gl520_attributes_opt[] = {
656 &sensor_dev_attr_in4_input.dev_attr.attr,
657 &sensor_dev_attr_in4_min.dev_attr.attr,
658 &sensor_dev_attr_in4_max.dev_attr.attr,
659 &sensor_dev_attr_in4_alarm.dev_attr.attr,
660 &sensor_dev_attr_in4_beep.dev_attr.attr,
661
662 &sensor_dev_attr_temp2_input.dev_attr.attr,
663 &sensor_dev_attr_temp2_max.dev_attr.attr,
664 &sensor_dev_attr_temp2_max_hyst.dev_attr.attr,
665 &sensor_dev_attr_temp2_alarm.dev_attr.attr,
666 &sensor_dev_attr_temp2_beep.dev_attr.attr,
667 NULL
668};
669
670static const struct attribute_group gl520_group_opt = {
671 .attrs = gl520_attributes_opt,
672};
673
674
675/*
676 * Real code
677 */
678
679/* Return 0 if detection is successful, -ENODEV otherwise */
680static int gl520_detect(struct i2c_client *client, struct i2c_board_info *info)
681{
682 struct i2c_adapter *adapter = client->adapter;
683
684 if (!i2c_check_functionality(adapter, I2C_FUNC_SMBUS_BYTE_DATA |
685 I2C_FUNC_SMBUS_WORD_DATA))
686 return -ENODEV;
687
688 /* Determine the chip type. */
689 if ((gl520_read_value(client, GL520_REG_CHIP_ID) != 0x20) ||
690 ((gl520_read_value(client, GL520_REG_REVISION) & 0x7f) != 0x00) ||
691 ((gl520_read_value(client, GL520_REG_CONF) & 0x80) != 0x00)) {
692 dev_dbg(&client->dev, "Unknown chip type, skipping\n");
693 return -ENODEV;
694 }
695
696 strlcpy(info->type, "gl520sm", I2C_NAME_SIZE);
697
698 return 0;
699}
700
701static int gl520_probe(struct i2c_client *client,
702 const struct i2c_device_id *id)
703{
704 struct gl520_data *data;
705 int err;
706
707 data = kzalloc(sizeof(struct gl520_data), GFP_KERNEL);
708 if (!data) {
709 err = -ENOMEM;
710 goto exit;
711 }
712
713 i2c_set_clientdata(client, data);
714 mutex_init(&data->update_lock);
715
716 /* Initialize the GL520SM chip */
717 gl520_init_client(client);
718
719 /* Register sysfs hooks */
720 if ((err = sysfs_create_group(&client->dev.kobj, &gl520_group)))
721 goto exit_free;
722
723 if (data->two_temps) {
724 if ((err = device_create_file(&client->dev,
725 &sensor_dev_attr_temp2_input.dev_attr))
726 || (err = device_create_file(&client->dev,
727 &sensor_dev_attr_temp2_max.dev_attr))
728 || (err = device_create_file(&client->dev,
729 &sensor_dev_attr_temp2_max_hyst.dev_attr))
730 || (err = device_create_file(&client->dev,
731 &sensor_dev_attr_temp2_alarm.dev_attr))
732 || (err = device_create_file(&client->dev,
733 &sensor_dev_attr_temp2_beep.dev_attr)))
734 goto exit_remove_files;
735 } else {
736 if ((err = device_create_file(&client->dev,
737 &sensor_dev_attr_in4_input.dev_attr))
738 || (err = device_create_file(&client->dev,
739 &sensor_dev_attr_in4_min.dev_attr))
740 || (err = device_create_file(&client->dev,
741 &sensor_dev_attr_in4_max.dev_attr))
742 || (err = device_create_file(&client->dev,
743 &sensor_dev_attr_in4_alarm.dev_attr))
744 || (err = device_create_file(&client->dev,
745 &sensor_dev_attr_in4_beep.dev_attr)))
746 goto exit_remove_files;
747 }
748
749
750 data->hwmon_dev = hwmon_device_register(&client->dev);
751 if (IS_ERR(data->hwmon_dev)) {
752 err = PTR_ERR(data->hwmon_dev);
753 goto exit_remove_files;
754 }
755
756 return 0;
757
758exit_remove_files:
759 sysfs_remove_group(&client->dev.kobj, &gl520_group);
760 sysfs_remove_group(&client->dev.kobj, &gl520_group_opt);
761exit_free:
762 kfree(data);
763exit:
764 return err;
765}
766
767
768/* Called when we have found a new GL520SM. */
769static void gl520_init_client(struct i2c_client *client)
770{
771 struct gl520_data *data = i2c_get_clientdata(client);
772 u8 oldconf, conf;
773
774 conf = oldconf = gl520_read_value(client, GL520_REG_CONF);
775
776 data->alarm_mask = 0xff;
777 data->vrm = vid_which_vrm();
778
779 if (extra_sensor_type == 1)
780 conf &= ~0x10;
781 else if (extra_sensor_type == 2)
782 conf |= 0x10;
783 data->two_temps = !(conf & 0x10);
784
785 /* If IRQ# is disabled, we can safely force comparator mode */
786 if (!(conf & 0x20))
787 conf &= 0xf7;
788
789 /* Enable monitoring if needed */
790 conf |= 0x40;
791
792 if (conf != oldconf)
793 gl520_write_value(client, GL520_REG_CONF, conf);
794
795 gl520_update_device(&(client->dev));
796
797 if (data->fan_min[0] == 0)
798 data->alarm_mask &= ~0x20;
799 if (data->fan_min[1] == 0)
800 data->alarm_mask &= ~0x40;
801
802 data->beep_mask &= data->alarm_mask;
803 gl520_write_value(client, GL520_REG_BEEP_MASK, data->beep_mask);
804}
805
806static int gl520_remove(struct i2c_client *client)
807{
808 struct gl520_data *data = i2c_get_clientdata(client);
809
810 hwmon_device_unregister(data->hwmon_dev);
811 sysfs_remove_group(&client->dev.kobj, &gl520_group);
812 sysfs_remove_group(&client->dev.kobj, &gl520_group_opt);
813
814 kfree(data);
815 return 0;
816}
817
818
819/* Registers 0x07 to 0x0c are word-sized, others are byte-sized
820 GL520 uses a high-byte first convention */
821static int gl520_read_value(struct i2c_client *client, u8 reg)
822{
823 if ((reg >= 0x07) && (reg <= 0x0c))
824 return swab16(i2c_smbus_read_word_data(client, reg));
825 else
826 return i2c_smbus_read_byte_data(client, reg);
827}
828
829static int gl520_write_value(struct i2c_client *client, u8 reg, u16 value)
830{
831 if ((reg >= 0x07) && (reg <= 0x0c))
832 return i2c_smbus_write_word_data(client, reg, swab16(value));
833 else
834 return i2c_smbus_write_byte_data(client, reg, value);
835}
836
837
838static struct gl520_data *gl520_update_device(struct device *dev)
839{
840 struct i2c_client *client = to_i2c_client(dev);
841 struct gl520_data *data = i2c_get_clientdata(client);
842 int val, i;
843
844 mutex_lock(&data->update_lock);
845
846 if (time_after(jiffies, data->last_updated + 2 * HZ) || !data->valid) {
847
848 dev_dbg(&client->dev, "Starting gl520sm update\n");
849
850 data->alarms = gl520_read_value(client, GL520_REG_ALARMS);
851 data->beep_mask = gl520_read_value(client, GL520_REG_BEEP_MASK);
852 data->vid = gl520_read_value(client, GL520_REG_VID_INPUT) & 0x1f;
853
854 for (i = 0; i < 4; i++) {
855 data->in_input[i] = gl520_read_value(client,
856 GL520_REG_IN_INPUT[i]);
857 val = gl520_read_value(client, GL520_REG_IN_LIMIT[i]);
858 data->in_min[i] = val & 0xff;
859 data->in_max[i] = (val >> 8) & 0xff;
860 }
861
862 val = gl520_read_value(client, GL520_REG_FAN_INPUT);
863 data->fan_input[0] = (val >> 8) & 0xff;
864 data->fan_input[1] = val & 0xff;
865
866 val = gl520_read_value(client, GL520_REG_FAN_MIN);
867 data->fan_min[0] = (val >> 8) & 0xff;
868 data->fan_min[1] = val & 0xff;
869
870 data->temp_input[0] = gl520_read_value(client,
871 GL520_REG_TEMP_INPUT[0]);
872 data->temp_max[0] = gl520_read_value(client,
873 GL520_REG_TEMP_MAX[0]);
874 data->temp_max_hyst[0] = gl520_read_value(client,
875 GL520_REG_TEMP_MAX_HYST[0]);
876
877 val = gl520_read_value(client, GL520_REG_FAN_DIV);
878 data->fan_div[0] = (val >> 6) & 0x03;
879 data->fan_div[1] = (val >> 4) & 0x03;
880 data->fan_off = (val >> 2) & 0x01;
881
882 data->alarms &= data->alarm_mask;
883
884 val = gl520_read_value(client, GL520_REG_CONF);
885 data->beep_enable = !((val >> 2) & 1);
886
887 /* Temp1 and Vin4 are the same input */
888 if (data->two_temps) {
889 data->temp_input[1] = gl520_read_value(client,
890 GL520_REG_TEMP_INPUT[1]);
891 data->temp_max[1] = gl520_read_value(client,
892 GL520_REG_TEMP_MAX[1]);
893 data->temp_max_hyst[1] = gl520_read_value(client,
894 GL520_REG_TEMP_MAX_HYST[1]);
895 } else {
896 data->in_input[4] = gl520_read_value(client,
897 GL520_REG_IN_INPUT[4]);
898 data->in_min[4] = gl520_read_value(client,
899 GL520_REG_IN_MIN[4]);
900 data->in_max[4] = gl520_read_value(client,
901 GL520_REG_IN_MAX[4]);
902 }
903
904 data->last_updated = jiffies;
905 data->valid = 1;
906 }
907
908 mutex_unlock(&data->update_lock);
909
910 return data;
911}
912
913
914static int __init sensors_gl520sm_init(void)
915{
916 return i2c_add_driver(&gl520_driver);
917}
918
919static void __exit sensors_gl520sm_exit(void)
920{
921 i2c_del_driver(&gl520_driver);
922}
923
924
925MODULE_AUTHOR("Frodo Looijaard <frodol@dds.nl>, "
926 "Kyösti Mälkki <kmalkki@cc.hut.fi>, "
927 "Maarten Deprez <maartendeprez@users.sourceforge.net>");
928MODULE_DESCRIPTION("GL520SM driver");
929MODULE_LICENSE("GPL");
930
931module_init(sensors_gl520sm_init);
932module_exit(sensors_gl520sm_exit);
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/* Client data */
77struct gl520_data {
78 struct i2c_client *client;
79 const struct attribute_group *groups[3];
80 struct mutex update_lock;
81 char valid; /* zero until the following fields are valid */
82 unsigned long last_updated; /* in jiffies */
83
84 u8 vid;
85 u8 vrm;
86 u8 in_input[5]; /* [0] = VVD */
87 u8 in_min[5]; /* [0] = VDD */
88 u8 in_max[5]; /* [0] = VDD */
89 u8 fan_input[2];
90 u8 fan_min[2];
91 u8 fan_div[2];
92 u8 fan_off;
93 u8 temp_input[2];
94 u8 temp_max[2];
95 u8 temp_max_hyst[2];
96 u8 alarms;
97 u8 beep_enable;
98 u8 beep_mask;
99 u8 alarm_mask;
100 u8 two_temps;
101};
102
103/*
104 * Registers 0x07 to 0x0c are word-sized, others are byte-sized
105 * GL520 uses a high-byte first convention
106 */
107static int gl520_read_value(struct i2c_client *client, u8 reg)
108{
109 if ((reg >= 0x07) && (reg <= 0x0c))
110 return i2c_smbus_read_word_swapped(client, reg);
111 else
112 return i2c_smbus_read_byte_data(client, reg);
113}
114
115static int gl520_write_value(struct i2c_client *client, u8 reg, u16 value)
116{
117 if ((reg >= 0x07) && (reg <= 0x0c))
118 return i2c_smbus_write_word_swapped(client, reg, value);
119 else
120 return i2c_smbus_write_byte_data(client, reg, value);
121}
122
123static struct gl520_data *gl520_update_device(struct device *dev)
124{
125 struct gl520_data *data = dev_get_drvdata(dev);
126 struct i2c_client *client = data->client;
127 int val, i;
128
129 mutex_lock(&data->update_lock);
130
131 if (time_after(jiffies, data->last_updated + 2 * HZ) || !data->valid) {
132
133 dev_dbg(&client->dev, "Starting gl520sm update\n");
134
135 data->alarms = gl520_read_value(client, GL520_REG_ALARMS);
136 data->beep_mask = gl520_read_value(client, GL520_REG_BEEP_MASK);
137 data->vid = gl520_read_value(client,
138 GL520_REG_VID_INPUT) & 0x1f;
139
140 for (i = 0; i < 4; i++) {
141 data->in_input[i] = gl520_read_value(client,
142 GL520_REG_IN_INPUT[i]);
143 val = gl520_read_value(client, GL520_REG_IN_LIMIT[i]);
144 data->in_min[i] = val & 0xff;
145 data->in_max[i] = (val >> 8) & 0xff;
146 }
147
148 val = gl520_read_value(client, GL520_REG_FAN_INPUT);
149 data->fan_input[0] = (val >> 8) & 0xff;
150 data->fan_input[1] = val & 0xff;
151
152 val = gl520_read_value(client, GL520_REG_FAN_MIN);
153 data->fan_min[0] = (val >> 8) & 0xff;
154 data->fan_min[1] = val & 0xff;
155
156 data->temp_input[0] = gl520_read_value(client,
157 GL520_REG_TEMP_INPUT[0]);
158 data->temp_max[0] = gl520_read_value(client,
159 GL520_REG_TEMP_MAX[0]);
160 data->temp_max_hyst[0] = gl520_read_value(client,
161 GL520_REG_TEMP_MAX_HYST[0]);
162
163 val = gl520_read_value(client, GL520_REG_FAN_DIV);
164 data->fan_div[0] = (val >> 6) & 0x03;
165 data->fan_div[1] = (val >> 4) & 0x03;
166 data->fan_off = (val >> 2) & 0x01;
167
168 data->alarms &= data->alarm_mask;
169
170 val = gl520_read_value(client, GL520_REG_CONF);
171 data->beep_enable = !((val >> 2) & 1);
172
173 /* Temp1 and Vin4 are the same input */
174 if (data->two_temps) {
175 data->temp_input[1] = gl520_read_value(client,
176 GL520_REG_TEMP_INPUT[1]);
177 data->temp_max[1] = gl520_read_value(client,
178 GL520_REG_TEMP_MAX[1]);
179 data->temp_max_hyst[1] = gl520_read_value(client,
180 GL520_REG_TEMP_MAX_HYST[1]);
181 } else {
182 data->in_input[4] = gl520_read_value(client,
183 GL520_REG_IN_INPUT[4]);
184 data->in_min[4] = gl520_read_value(client,
185 GL520_REG_IN_MIN[4]);
186 data->in_max[4] = gl520_read_value(client,
187 GL520_REG_IN_MAX[4]);
188 }
189
190 data->last_updated = jiffies;
191 data->valid = 1;
192 }
193
194 mutex_unlock(&data->update_lock);
195
196 return data;
197}
198
199/*
200 * Sysfs stuff
201 */
202
203static ssize_t cpu0_vid_show(struct device *dev,
204 struct device_attribute *attr, char *buf)
205{
206 struct gl520_data *data = gl520_update_device(dev);
207 return sprintf(buf, "%u\n", vid_from_reg(data->vid, data->vrm));
208}
209static DEVICE_ATTR_RO(cpu0_vid);
210
211#define VDD_FROM_REG(val) DIV_ROUND_CLOSEST((val) * 95, 4)
212#define VDD_CLAMP(val) clamp_val(val, 0, 255 * 95 / 4)
213#define VDD_TO_REG(val) DIV_ROUND_CLOSEST(VDD_CLAMP(val) * 4, 95)
214
215#define IN_FROM_REG(val) ((val) * 19)
216#define IN_CLAMP(val) clamp_val(val, 0, 255 * 19)
217#define IN_TO_REG(val) DIV_ROUND_CLOSEST(IN_CLAMP(val), 19)
218
219static ssize_t get_in_input(struct device *dev, struct device_attribute *attr,
220 char *buf)
221{
222 int n = to_sensor_dev_attr(attr)->index;
223 struct gl520_data *data = gl520_update_device(dev);
224 u8 r = data->in_input[n];
225
226 if (n == 0)
227 return sprintf(buf, "%d\n", VDD_FROM_REG(r));
228 else
229 return sprintf(buf, "%d\n", IN_FROM_REG(r));
230}
231
232static ssize_t get_in_min(struct device *dev, struct device_attribute *attr,
233 char *buf)
234{
235 int n = to_sensor_dev_attr(attr)->index;
236 struct gl520_data *data = gl520_update_device(dev);
237 u8 r = data->in_min[n];
238
239 if (n == 0)
240 return sprintf(buf, "%d\n", VDD_FROM_REG(r));
241 else
242 return sprintf(buf, "%d\n", IN_FROM_REG(r));
243}
244
245static ssize_t get_in_max(struct device *dev, struct device_attribute *attr,
246 char *buf)
247{
248 int n = to_sensor_dev_attr(attr)->index;
249 struct gl520_data *data = gl520_update_device(dev);
250 u8 r = data->in_max[n];
251
252 if (n == 0)
253 return sprintf(buf, "%d\n", VDD_FROM_REG(r));
254 else
255 return sprintf(buf, "%d\n", IN_FROM_REG(r));
256}
257
258static ssize_t set_in_min(struct device *dev, struct device_attribute *attr,
259 const char *buf, size_t count)
260{
261 struct gl520_data *data = dev_get_drvdata(dev);
262 struct i2c_client *client = data->client;
263 int n = to_sensor_dev_attr(attr)->index;
264 u8 r;
265 long v;
266 int err;
267
268 err = kstrtol(buf, 10, &v);
269 if (err)
270 return err;
271
272 mutex_lock(&data->update_lock);
273
274 if (n == 0)
275 r = VDD_TO_REG(v);
276 else
277 r = IN_TO_REG(v);
278
279 data->in_min[n] = r;
280
281 if (n < 4)
282 gl520_write_value(client, GL520_REG_IN_MIN[n],
283 (gl520_read_value(client, GL520_REG_IN_MIN[n])
284 & ~0xff) | r);
285 else
286 gl520_write_value(client, GL520_REG_IN_MIN[n], r);
287
288 mutex_unlock(&data->update_lock);
289 return count;
290}
291
292static ssize_t set_in_max(struct device *dev, struct device_attribute *attr,
293 const char *buf, size_t count)
294{
295 struct gl520_data *data = dev_get_drvdata(dev);
296 struct i2c_client *client = data->client;
297 int n = to_sensor_dev_attr(attr)->index;
298 u8 r;
299 long v;
300 int err;
301
302 err = kstrtol(buf, 10, &v);
303 if (err)
304 return err;
305
306 if (n == 0)
307 r = VDD_TO_REG(v);
308 else
309 r = IN_TO_REG(v);
310
311 mutex_lock(&data->update_lock);
312
313 data->in_max[n] = r;
314
315 if (n < 4)
316 gl520_write_value(client, GL520_REG_IN_MAX[n],
317 (gl520_read_value(client, GL520_REG_IN_MAX[n])
318 & ~0xff00) | (r << 8));
319 else
320 gl520_write_value(client, GL520_REG_IN_MAX[n], r);
321
322 mutex_unlock(&data->update_lock);
323 return count;
324}
325
326static SENSOR_DEVICE_ATTR(in0_input, S_IRUGO, get_in_input, NULL, 0);
327static SENSOR_DEVICE_ATTR(in1_input, S_IRUGO, get_in_input, NULL, 1);
328static SENSOR_DEVICE_ATTR(in2_input, S_IRUGO, get_in_input, NULL, 2);
329static SENSOR_DEVICE_ATTR(in3_input, S_IRUGO, get_in_input, NULL, 3);
330static SENSOR_DEVICE_ATTR(in4_input, S_IRUGO, get_in_input, NULL, 4);
331static SENSOR_DEVICE_ATTR(in0_min, S_IRUGO | S_IWUSR,
332 get_in_min, set_in_min, 0);
333static SENSOR_DEVICE_ATTR(in1_min, S_IRUGO | S_IWUSR,
334 get_in_min, set_in_min, 1);
335static SENSOR_DEVICE_ATTR(in2_min, S_IRUGO | S_IWUSR,
336 get_in_min, set_in_min, 2);
337static SENSOR_DEVICE_ATTR(in3_min, S_IRUGO | S_IWUSR,
338 get_in_min, set_in_min, 3);
339static SENSOR_DEVICE_ATTR(in4_min, S_IRUGO | S_IWUSR,
340 get_in_min, set_in_min, 4);
341static SENSOR_DEVICE_ATTR(in0_max, S_IRUGO | S_IWUSR,
342 get_in_max, set_in_max, 0);
343static SENSOR_DEVICE_ATTR(in1_max, S_IRUGO | S_IWUSR,
344 get_in_max, set_in_max, 1);
345static SENSOR_DEVICE_ATTR(in2_max, S_IRUGO | S_IWUSR,
346 get_in_max, set_in_max, 2);
347static SENSOR_DEVICE_ATTR(in3_max, S_IRUGO | S_IWUSR,
348 get_in_max, set_in_max, 3);
349static SENSOR_DEVICE_ATTR(in4_max, S_IRUGO | S_IWUSR,
350 get_in_max, set_in_max, 4);
351
352#define DIV_FROM_REG(val) (1 << (val))
353#define FAN_FROM_REG(val, div) ((val) == 0 ? 0 : (480000 / ((val) << (div))))
354
355#define FAN_BASE(div) (480000 >> (div))
356#define FAN_CLAMP(val, div) clamp_val(val, FAN_BASE(div) / 255, \
357 FAN_BASE(div))
358#define FAN_TO_REG(val, div) ((val) == 0 ? 0 : \
359 DIV_ROUND_CLOSEST(480000, \
360 FAN_CLAMP(val, div) << (div)))
361
362static ssize_t get_fan_input(struct device *dev, struct device_attribute *attr,
363 char *buf)
364{
365 int n = to_sensor_dev_attr(attr)->index;
366 struct gl520_data *data = gl520_update_device(dev);
367
368 return sprintf(buf, "%d\n", FAN_FROM_REG(data->fan_input[n],
369 data->fan_div[n]));
370}
371
372static ssize_t get_fan_min(struct device *dev, struct device_attribute *attr,
373 char *buf)
374{
375 int n = to_sensor_dev_attr(attr)->index;
376 struct gl520_data *data = gl520_update_device(dev);
377
378 return sprintf(buf, "%d\n", FAN_FROM_REG(data->fan_min[n],
379 data->fan_div[n]));
380}
381
382static ssize_t get_fan_div(struct device *dev, struct device_attribute *attr,
383 char *buf)
384{
385 int n = to_sensor_dev_attr(attr)->index;
386 struct gl520_data *data = gl520_update_device(dev);
387
388 return sprintf(buf, "%d\n", DIV_FROM_REG(data->fan_div[n]));
389}
390
391static ssize_t fan1_off_show(struct device *dev,
392 struct device_attribute *attr, char *buf)
393{
394 struct gl520_data *data = gl520_update_device(dev);
395 return sprintf(buf, "%d\n", data->fan_off);
396}
397
398static ssize_t set_fan_min(struct device *dev, struct device_attribute *attr,
399 const char *buf, size_t count)
400{
401 struct gl520_data *data = dev_get_drvdata(dev);
402 struct i2c_client *client = data->client;
403 int n = to_sensor_dev_attr(attr)->index;
404 u8 r;
405 unsigned long v;
406 int err;
407
408 err = kstrtoul(buf, 10, &v);
409 if (err)
410 return err;
411
412 mutex_lock(&data->update_lock);
413 r = FAN_TO_REG(v, data->fan_div[n]);
414 data->fan_min[n] = r;
415
416 if (n == 0)
417 gl520_write_value(client, GL520_REG_FAN_MIN,
418 (gl520_read_value(client, GL520_REG_FAN_MIN)
419 & ~0xff00) | (r << 8));
420 else
421 gl520_write_value(client, GL520_REG_FAN_MIN,
422 (gl520_read_value(client, GL520_REG_FAN_MIN)
423 & ~0xff) | r);
424
425 data->beep_mask = gl520_read_value(client, GL520_REG_BEEP_MASK);
426 if (data->fan_min[n] == 0)
427 data->alarm_mask &= (n == 0) ? ~0x20 : ~0x40;
428 else
429 data->alarm_mask |= (n == 0) ? 0x20 : 0x40;
430 data->beep_mask &= data->alarm_mask;
431 gl520_write_value(client, GL520_REG_BEEP_MASK, data->beep_mask);
432
433 mutex_unlock(&data->update_lock);
434 return count;
435}
436
437static ssize_t set_fan_div(struct device *dev, struct device_attribute *attr,
438 const char *buf, size_t count)
439{
440 struct gl520_data *data = dev_get_drvdata(dev);
441 struct i2c_client *client = data->client;
442 int n = to_sensor_dev_attr(attr)->index;
443 u8 r;
444 unsigned long v;
445 int err;
446
447 err = kstrtoul(buf, 10, &v);
448 if (err)
449 return err;
450
451 switch (v) {
452 case 1:
453 r = 0;
454 break;
455 case 2:
456 r = 1;
457 break;
458 case 4:
459 r = 2;
460 break;
461 case 8:
462 r = 3;
463 break;
464 default:
465 dev_err(&client->dev,
466 "fan_div value %ld not supported. Choose one of 1, 2, 4 or 8!\n", v);
467 return -EINVAL;
468 }
469
470 mutex_lock(&data->update_lock);
471 data->fan_div[n] = r;
472
473 if (n == 0)
474 gl520_write_value(client, GL520_REG_FAN_DIV,
475 (gl520_read_value(client, GL520_REG_FAN_DIV)
476 & ~0xc0) | (r << 6));
477 else
478 gl520_write_value(client, GL520_REG_FAN_DIV,
479 (gl520_read_value(client, GL520_REG_FAN_DIV)
480 & ~0x30) | (r << 4));
481
482 mutex_unlock(&data->update_lock);
483 return count;
484}
485
486static ssize_t fan1_off_store(struct device *dev,
487 struct device_attribute *attr, const char *buf,
488 size_t count)
489{
490 struct gl520_data *data = dev_get_drvdata(dev);
491 struct i2c_client *client = data->client;
492 u8 r;
493 unsigned long v;
494 int err;
495
496 err = kstrtoul(buf, 10, &v);
497 if (err)
498 return err;
499
500 r = (v ? 1 : 0);
501
502 mutex_lock(&data->update_lock);
503 data->fan_off = r;
504 gl520_write_value(client, GL520_REG_FAN_OFF,
505 (gl520_read_value(client, GL520_REG_FAN_OFF)
506 & ~0x0c) | (r << 2));
507 mutex_unlock(&data->update_lock);
508 return count;
509}
510
511static SENSOR_DEVICE_ATTR(fan1_input, S_IRUGO, get_fan_input, NULL, 0);
512static SENSOR_DEVICE_ATTR(fan2_input, S_IRUGO, get_fan_input, NULL, 1);
513static SENSOR_DEVICE_ATTR(fan1_min, S_IRUGO | S_IWUSR,
514 get_fan_min, set_fan_min, 0);
515static SENSOR_DEVICE_ATTR(fan2_min, S_IRUGO | S_IWUSR,
516 get_fan_min, set_fan_min, 1);
517static SENSOR_DEVICE_ATTR(fan1_div, S_IRUGO | S_IWUSR,
518 get_fan_div, set_fan_div, 0);
519static SENSOR_DEVICE_ATTR(fan2_div, S_IRUGO | S_IWUSR,
520 get_fan_div, set_fan_div, 1);
521static DEVICE_ATTR_RW(fan1_off);
522
523#define TEMP_FROM_REG(val) (((val) - 130) * 1000)
524#define TEMP_CLAMP(val) clamp_val(val, -130000, 125000)
525#define TEMP_TO_REG(val) (DIV_ROUND_CLOSEST(TEMP_CLAMP(val), 1000) + 130)
526
527static ssize_t get_temp_input(struct device *dev, struct device_attribute *attr,
528 char *buf)
529{
530 int n = to_sensor_dev_attr(attr)->index;
531 struct gl520_data *data = gl520_update_device(dev);
532
533 return sprintf(buf, "%d\n", TEMP_FROM_REG(data->temp_input[n]));
534}
535
536static ssize_t get_temp_max(struct device *dev, struct device_attribute *attr,
537 char *buf)
538{
539 int n = to_sensor_dev_attr(attr)->index;
540 struct gl520_data *data = gl520_update_device(dev);
541
542 return sprintf(buf, "%d\n", TEMP_FROM_REG(data->temp_max[n]));
543}
544
545static ssize_t get_temp_max_hyst(struct device *dev,
546 struct device_attribute *attr, char *buf)
547{
548 int n = to_sensor_dev_attr(attr)->index;
549 struct gl520_data *data = gl520_update_device(dev);
550
551 return sprintf(buf, "%d\n", TEMP_FROM_REG(data->temp_max_hyst[n]));
552}
553
554static ssize_t set_temp_max(struct device *dev, struct device_attribute *attr,
555 const char *buf, size_t count)
556{
557 struct gl520_data *data = dev_get_drvdata(dev);
558 struct i2c_client *client = data->client;
559 int n = to_sensor_dev_attr(attr)->index;
560 long v;
561 int err;
562
563 err = kstrtol(buf, 10, &v);
564 if (err)
565 return err;
566
567 mutex_lock(&data->update_lock);
568 data->temp_max[n] = TEMP_TO_REG(v);
569 gl520_write_value(client, GL520_REG_TEMP_MAX[n], data->temp_max[n]);
570 mutex_unlock(&data->update_lock);
571 return count;
572}
573
574static ssize_t set_temp_max_hyst(struct device *dev, struct device_attribute
575 *attr, const char *buf, size_t count)
576{
577 struct gl520_data *data = dev_get_drvdata(dev);
578 struct i2c_client *client = data->client;
579 int n = to_sensor_dev_attr(attr)->index;
580 long v;
581 int err;
582
583 err = kstrtol(buf, 10, &v);
584 if (err)
585 return err;
586
587 mutex_lock(&data->update_lock);
588 data->temp_max_hyst[n] = TEMP_TO_REG(v);
589 gl520_write_value(client, GL520_REG_TEMP_MAX_HYST[n],
590 data->temp_max_hyst[n]);
591 mutex_unlock(&data->update_lock);
592 return count;
593}
594
595static SENSOR_DEVICE_ATTR(temp1_input, S_IRUGO, get_temp_input, NULL, 0);
596static SENSOR_DEVICE_ATTR(temp2_input, S_IRUGO, get_temp_input, NULL, 1);
597static SENSOR_DEVICE_ATTR(temp1_max, S_IRUGO | S_IWUSR,
598 get_temp_max, set_temp_max, 0);
599static SENSOR_DEVICE_ATTR(temp2_max, S_IRUGO | S_IWUSR,
600 get_temp_max, set_temp_max, 1);
601static SENSOR_DEVICE_ATTR(temp1_max_hyst, S_IRUGO | S_IWUSR,
602 get_temp_max_hyst, set_temp_max_hyst, 0);
603static SENSOR_DEVICE_ATTR(temp2_max_hyst, S_IRUGO | S_IWUSR,
604 get_temp_max_hyst, set_temp_max_hyst, 1);
605
606static ssize_t alarms_show(struct device *dev, struct device_attribute *attr,
607 char *buf)
608{
609 struct gl520_data *data = gl520_update_device(dev);
610 return sprintf(buf, "%d\n", data->alarms);
611}
612
613static ssize_t beep_enable_show(struct device *dev,
614 struct device_attribute *attr, char *buf)
615{
616 struct gl520_data *data = gl520_update_device(dev);
617 return sprintf(buf, "%d\n", data->beep_enable);
618}
619
620static ssize_t beep_mask_show(struct device *dev,
621 struct device_attribute *attr, char *buf)
622{
623 struct gl520_data *data = gl520_update_device(dev);
624 return sprintf(buf, "%d\n", data->beep_mask);
625}
626
627static ssize_t beep_enable_store(struct device *dev,
628 struct device_attribute *attr,
629 const char *buf, size_t count)
630{
631 struct gl520_data *data = dev_get_drvdata(dev);
632 struct i2c_client *client = data->client;
633 u8 r;
634 unsigned long v;
635 int err;
636
637 err = kstrtoul(buf, 10, &v);
638 if (err)
639 return err;
640
641 r = (v ? 0 : 1);
642
643 mutex_lock(&data->update_lock);
644 data->beep_enable = !r;
645 gl520_write_value(client, GL520_REG_BEEP_ENABLE,
646 (gl520_read_value(client, GL520_REG_BEEP_ENABLE)
647 & ~0x04) | (r << 2));
648 mutex_unlock(&data->update_lock);
649 return count;
650}
651
652static ssize_t beep_mask_store(struct device *dev,
653 struct device_attribute *attr, const char *buf,
654 size_t count)
655{
656 struct gl520_data *data = dev_get_drvdata(dev);
657 struct i2c_client *client = data->client;
658 unsigned long r;
659 int err;
660
661 err = kstrtoul(buf, 10, &r);
662 if (err)
663 return err;
664
665 mutex_lock(&data->update_lock);
666 r &= data->alarm_mask;
667 data->beep_mask = r;
668 gl520_write_value(client, GL520_REG_BEEP_MASK, r);
669 mutex_unlock(&data->update_lock);
670 return count;
671}
672
673static DEVICE_ATTR_RO(alarms);
674static DEVICE_ATTR_RW(beep_enable);
675static DEVICE_ATTR_RW(beep_mask);
676
677static ssize_t get_alarm(struct device *dev, struct device_attribute *attr,
678 char *buf)
679{
680 int bit_nr = to_sensor_dev_attr(attr)->index;
681 struct gl520_data *data = gl520_update_device(dev);
682
683 return sprintf(buf, "%d\n", (data->alarms >> bit_nr) & 1);
684}
685
686static SENSOR_DEVICE_ATTR(in0_alarm, S_IRUGO, get_alarm, NULL, 0);
687static SENSOR_DEVICE_ATTR(in1_alarm, S_IRUGO, get_alarm, NULL, 1);
688static SENSOR_DEVICE_ATTR(in2_alarm, S_IRUGO, get_alarm, NULL, 2);
689static SENSOR_DEVICE_ATTR(in3_alarm, S_IRUGO, get_alarm, NULL, 3);
690static SENSOR_DEVICE_ATTR(temp1_alarm, S_IRUGO, get_alarm, NULL, 4);
691static SENSOR_DEVICE_ATTR(fan1_alarm, S_IRUGO, get_alarm, NULL, 5);
692static SENSOR_DEVICE_ATTR(fan2_alarm, S_IRUGO, get_alarm, NULL, 6);
693static SENSOR_DEVICE_ATTR(temp2_alarm, S_IRUGO, get_alarm, NULL, 7);
694static SENSOR_DEVICE_ATTR(in4_alarm, S_IRUGO, get_alarm, NULL, 7);
695
696static ssize_t get_beep(struct device *dev, struct device_attribute *attr,
697 char *buf)
698{
699 int bitnr = to_sensor_dev_attr(attr)->index;
700 struct gl520_data *data = gl520_update_device(dev);
701
702 return sprintf(buf, "%d\n", (data->beep_mask >> bitnr) & 1);
703}
704
705static ssize_t set_beep(struct device *dev, struct device_attribute *attr,
706 const char *buf, size_t count)
707{
708 struct gl520_data *data = dev_get_drvdata(dev);
709 struct i2c_client *client = data->client;
710 int bitnr = to_sensor_dev_attr(attr)->index;
711 unsigned long bit;
712
713 int err;
714
715 err = kstrtoul(buf, 10, &bit);
716 if (err)
717 return err;
718 if (bit & ~1)
719 return -EINVAL;
720
721 mutex_lock(&data->update_lock);
722 data->beep_mask = gl520_read_value(client, GL520_REG_BEEP_MASK);
723 if (bit)
724 data->beep_mask |= (1 << bitnr);
725 else
726 data->beep_mask &= ~(1 << bitnr);
727 gl520_write_value(client, GL520_REG_BEEP_MASK, data->beep_mask);
728 mutex_unlock(&data->update_lock);
729 return count;
730}
731
732static SENSOR_DEVICE_ATTR(in0_beep, S_IRUGO | S_IWUSR, get_beep, set_beep, 0);
733static SENSOR_DEVICE_ATTR(in1_beep, S_IRUGO | S_IWUSR, get_beep, set_beep, 1);
734static SENSOR_DEVICE_ATTR(in2_beep, S_IRUGO | S_IWUSR, get_beep, set_beep, 2);
735static SENSOR_DEVICE_ATTR(in3_beep, S_IRUGO | S_IWUSR, get_beep, set_beep, 3);
736static SENSOR_DEVICE_ATTR(temp1_beep, S_IRUGO | S_IWUSR, get_beep, set_beep, 4);
737static SENSOR_DEVICE_ATTR(fan1_beep, S_IRUGO | S_IWUSR, get_beep, set_beep, 5);
738static SENSOR_DEVICE_ATTR(fan2_beep, S_IRUGO | S_IWUSR, get_beep, set_beep, 6);
739static SENSOR_DEVICE_ATTR(temp2_beep, S_IRUGO | S_IWUSR, get_beep, set_beep, 7);
740static SENSOR_DEVICE_ATTR(in4_beep, S_IRUGO | S_IWUSR, get_beep, set_beep, 7);
741
742static struct attribute *gl520_attributes[] = {
743 &dev_attr_cpu0_vid.attr,
744
745 &sensor_dev_attr_in0_input.dev_attr.attr,
746 &sensor_dev_attr_in0_min.dev_attr.attr,
747 &sensor_dev_attr_in0_max.dev_attr.attr,
748 &sensor_dev_attr_in0_alarm.dev_attr.attr,
749 &sensor_dev_attr_in0_beep.dev_attr.attr,
750 &sensor_dev_attr_in1_input.dev_attr.attr,
751 &sensor_dev_attr_in1_min.dev_attr.attr,
752 &sensor_dev_attr_in1_max.dev_attr.attr,
753 &sensor_dev_attr_in1_alarm.dev_attr.attr,
754 &sensor_dev_attr_in1_beep.dev_attr.attr,
755 &sensor_dev_attr_in2_input.dev_attr.attr,
756 &sensor_dev_attr_in2_min.dev_attr.attr,
757 &sensor_dev_attr_in2_max.dev_attr.attr,
758 &sensor_dev_attr_in2_alarm.dev_attr.attr,
759 &sensor_dev_attr_in2_beep.dev_attr.attr,
760 &sensor_dev_attr_in3_input.dev_attr.attr,
761 &sensor_dev_attr_in3_min.dev_attr.attr,
762 &sensor_dev_attr_in3_max.dev_attr.attr,
763 &sensor_dev_attr_in3_alarm.dev_attr.attr,
764 &sensor_dev_attr_in3_beep.dev_attr.attr,
765
766 &sensor_dev_attr_fan1_input.dev_attr.attr,
767 &sensor_dev_attr_fan1_min.dev_attr.attr,
768 &sensor_dev_attr_fan1_div.dev_attr.attr,
769 &sensor_dev_attr_fan1_alarm.dev_attr.attr,
770 &sensor_dev_attr_fan1_beep.dev_attr.attr,
771 &dev_attr_fan1_off.attr,
772 &sensor_dev_attr_fan2_input.dev_attr.attr,
773 &sensor_dev_attr_fan2_min.dev_attr.attr,
774 &sensor_dev_attr_fan2_div.dev_attr.attr,
775 &sensor_dev_attr_fan2_alarm.dev_attr.attr,
776 &sensor_dev_attr_fan2_beep.dev_attr.attr,
777
778 &sensor_dev_attr_temp1_input.dev_attr.attr,
779 &sensor_dev_attr_temp1_max.dev_attr.attr,
780 &sensor_dev_attr_temp1_max_hyst.dev_attr.attr,
781 &sensor_dev_attr_temp1_alarm.dev_attr.attr,
782 &sensor_dev_attr_temp1_beep.dev_attr.attr,
783
784 &dev_attr_alarms.attr,
785 &dev_attr_beep_enable.attr,
786 &dev_attr_beep_mask.attr,
787 NULL
788};
789
790static const struct attribute_group gl520_group = {
791 .attrs = gl520_attributes,
792};
793
794static struct attribute *gl520_attributes_in4[] = {
795 &sensor_dev_attr_in4_input.dev_attr.attr,
796 &sensor_dev_attr_in4_min.dev_attr.attr,
797 &sensor_dev_attr_in4_max.dev_attr.attr,
798 &sensor_dev_attr_in4_alarm.dev_attr.attr,
799 &sensor_dev_attr_in4_beep.dev_attr.attr,
800 NULL
801};
802
803static struct attribute *gl520_attributes_temp2[] = {
804 &sensor_dev_attr_temp2_input.dev_attr.attr,
805 &sensor_dev_attr_temp2_max.dev_attr.attr,
806 &sensor_dev_attr_temp2_max_hyst.dev_attr.attr,
807 &sensor_dev_attr_temp2_alarm.dev_attr.attr,
808 &sensor_dev_attr_temp2_beep.dev_attr.attr,
809 NULL
810};
811
812static const struct attribute_group gl520_group_in4 = {
813 .attrs = gl520_attributes_in4,
814};
815
816static const struct attribute_group gl520_group_temp2 = {
817 .attrs = gl520_attributes_temp2,
818};
819
820
821/*
822 * Real code
823 */
824
825/* Return 0 if detection is successful, -ENODEV otherwise */
826static int gl520_detect(struct i2c_client *client, struct i2c_board_info *info)
827{
828 struct i2c_adapter *adapter = client->adapter;
829
830 if (!i2c_check_functionality(adapter, I2C_FUNC_SMBUS_BYTE_DATA |
831 I2C_FUNC_SMBUS_WORD_DATA))
832 return -ENODEV;
833
834 /* Determine the chip type. */
835 if ((gl520_read_value(client, GL520_REG_CHIP_ID) != 0x20) ||
836 ((gl520_read_value(client, GL520_REG_REVISION) & 0x7f) != 0x00) ||
837 ((gl520_read_value(client, GL520_REG_CONF) & 0x80) != 0x00)) {
838 dev_dbg(&client->dev, "Unknown chip type, skipping\n");
839 return -ENODEV;
840 }
841
842 strlcpy(info->type, "gl520sm", I2C_NAME_SIZE);
843
844 return 0;
845}
846
847/* Called when we have found a new GL520SM. */
848static void gl520_init_client(struct i2c_client *client)
849{
850 struct gl520_data *data = i2c_get_clientdata(client);
851 u8 oldconf, conf;
852
853 conf = oldconf = gl520_read_value(client, GL520_REG_CONF);
854
855 data->alarm_mask = 0xff;
856 data->vrm = vid_which_vrm();
857
858 if (extra_sensor_type == 1)
859 conf &= ~0x10;
860 else if (extra_sensor_type == 2)
861 conf |= 0x10;
862 data->two_temps = !(conf & 0x10);
863
864 /* If IRQ# is disabled, we can safely force comparator mode */
865 if (!(conf & 0x20))
866 conf &= 0xf7;
867
868 /* Enable monitoring if needed */
869 conf |= 0x40;
870
871 if (conf != oldconf)
872 gl520_write_value(client, GL520_REG_CONF, conf);
873
874 gl520_update_device(&(client->dev));
875
876 if (data->fan_min[0] == 0)
877 data->alarm_mask &= ~0x20;
878 if (data->fan_min[1] == 0)
879 data->alarm_mask &= ~0x40;
880
881 data->beep_mask &= data->alarm_mask;
882 gl520_write_value(client, GL520_REG_BEEP_MASK, data->beep_mask);
883}
884
885static int gl520_probe(struct i2c_client *client,
886 const struct i2c_device_id *id)
887{
888 struct device *dev = &client->dev;
889 struct device *hwmon_dev;
890 struct gl520_data *data;
891
892 data = devm_kzalloc(dev, sizeof(struct gl520_data), GFP_KERNEL);
893 if (!data)
894 return -ENOMEM;
895
896 i2c_set_clientdata(client, data);
897 mutex_init(&data->update_lock);
898 data->client = client;
899
900 /* Initialize the GL520SM chip */
901 gl520_init_client(client);
902
903 /* sysfs hooks */
904 data->groups[0] = &gl520_group;
905
906 if (data->two_temps)
907 data->groups[1] = &gl520_group_temp2;
908 else
909 data->groups[1] = &gl520_group_in4;
910
911 hwmon_dev = devm_hwmon_device_register_with_groups(dev, client->name,
912 data, data->groups);
913 return PTR_ERR_OR_ZERO(hwmon_dev);
914}
915
916static const struct i2c_device_id gl520_id[] = {
917 { "gl520sm", 0 },
918 { }
919};
920MODULE_DEVICE_TABLE(i2c, gl520_id);
921
922static struct i2c_driver gl520_driver = {
923 .class = I2C_CLASS_HWMON,
924 .driver = {
925 .name = "gl520sm",
926 },
927 .probe = gl520_probe,
928 .id_table = gl520_id,
929 .detect = gl520_detect,
930 .address_list = normal_i2c,
931};
932
933module_i2c_driver(gl520_driver);
934
935MODULE_AUTHOR("Frodo Looijaard <frodol@dds.nl>, "
936 "Kyösti Mälkki <kmalkki@cc.hut.fi>, "
937 "Maarten Deprez <maartendeprez@users.sourceforge.net>");
938MODULE_DESCRIPTION("GL520SM driver");
939MODULE_LICENSE("GPL");