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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/*
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");