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Merge branch 'master' of git://git.kernel.org/pub/scm/linux/kernel/git/torvalds/linux...
[linux-2.6-block.git] / drivers / hwmon / gl520sm.c
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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/* Insmod parameters */
45I2C_CLIENT_INSMOD_1(gl520sm);
46
47/* Many GL520 constants specified below
48One of the inputs can be configured as either temp or voltage.
49That's why _TEMP2 and _IN4 access the same register
50*/
51
52/* The GL520 registers */
53#define GL520_REG_CHIP_ID 0x00
54#define GL520_REG_REVISION 0x01
55#define GL520_REG_CONF 0x03
56#define GL520_REG_MASK 0x11
57
58#define GL520_REG_VID_INPUT 0x02
59
60static const u8 GL520_REG_IN_INPUT[] = { 0x15, 0x14, 0x13, 0x0d, 0x0e };
61static const u8 GL520_REG_IN_LIMIT[] = { 0x0c, 0x09, 0x0a, 0x0b };
62static const u8 GL520_REG_IN_MIN[] = { 0x0c, 0x09, 0x0a, 0x0b, 0x18 };
63static const u8 GL520_REG_IN_MAX[] = { 0x0c, 0x09, 0x0a, 0x0b, 0x17 };
64
65static const u8 GL520_REG_TEMP_INPUT[] = { 0x04, 0x0e };
66static const u8 GL520_REG_TEMP_MAX[] = { 0x05, 0x17 };
67static const u8 GL520_REG_TEMP_MAX_HYST[] = { 0x06, 0x18 };
68
69#define GL520_REG_FAN_INPUT 0x07
70#define GL520_REG_FAN_MIN 0x08
71#define GL520_REG_FAN_DIV 0x0f
72#define GL520_REG_FAN_OFF GL520_REG_FAN_DIV
73
74#define GL520_REG_ALARMS 0x12
75#define GL520_REG_BEEP_MASK 0x10
76#define GL520_REG_BEEP_ENABLE GL520_REG_CONF
77
78/*
79 * Function declarations
80 */
81
82static int gl520_probe(struct i2c_client *client,
83 const struct i2c_device_id *id);
84static int gl520_detect(struct i2c_client *client, int kind,
85 struct i2c_board_info *info);
86static void gl520_init_client(struct i2c_client *client);
87static int gl520_remove(struct i2c_client *client);
88static int gl520_read_value(struct i2c_client *client, u8 reg);
89static int gl520_write_value(struct i2c_client *client, u8 reg, u16 value);
90static struct gl520_data *gl520_update_device(struct device *dev);
91
92/* Driver data */
93static const struct i2c_device_id gl520_id[] = {
94 { "gl520sm", gl520sm },
95 { }
96};
97MODULE_DEVICE_TABLE(i2c, gl520_id);
98
99static struct i2c_driver gl520_driver = {
100 .class = I2C_CLASS_HWMON,
101 .driver = {
102 .name = "gl520sm",
103 },
104 .probe = gl520_probe,
105 .remove = gl520_remove,
106 .id_table = gl520_id,
107 .detect = gl520_detect,
108 .address_data = &addr_data,
109};
110
111/* Client data */
112struct gl520_data {
113 struct device *hwmon_dev;
114 struct mutex update_lock;
115 char valid; /* zero until the following fields are valid */
116 unsigned long last_updated; /* in jiffies */
117
118 u8 vid;
119 u8 vrm;
120 u8 in_input[5]; /* [0] = VVD */
121 u8 in_min[5]; /* [0] = VDD */
122 u8 in_max[5]; /* [0] = VDD */
123 u8 fan_input[2];
124 u8 fan_min[2];
125 u8 fan_div[2];
126 u8 fan_off;
127 u8 temp_input[2];
128 u8 temp_max[2];
129 u8 temp_max_hyst[2];
130 u8 alarms;
131 u8 beep_enable;
132 u8 beep_mask;
133 u8 alarm_mask;
134 u8 two_temps;
135};
136
137/*
138 * Sysfs stuff
139 */
140
141static ssize_t get_cpu_vid(struct device *dev, struct device_attribute *attr,
142 char *buf)
143{
144 struct gl520_data *data = gl520_update_device(dev);
145 return sprintf(buf, "%u\n", vid_from_reg(data->vid, data->vrm));
146}
147static DEVICE_ATTR(cpu0_vid, S_IRUGO, get_cpu_vid, NULL);
148
149#define VDD_FROM_REG(val) (((val)*95+2)/4)
150#define VDD_TO_REG(val) (SENSORS_LIMIT((((val)*4+47)/95),0,255))
151
152#define IN_FROM_REG(val) ((val)*19)
153#define IN_TO_REG(val) (SENSORS_LIMIT((((val)+9)/19),0,255))
154
155static ssize_t get_in_input(struct device *dev, struct device_attribute *attr,
156 char *buf)
157{
158 int n = to_sensor_dev_attr(attr)->index;
159 struct gl520_data *data = gl520_update_device(dev);
160 u8 r = data->in_input[n];
161
162 if (n == 0)
163 return sprintf(buf, "%d\n", VDD_FROM_REG(r));
164 else
165 return sprintf(buf, "%d\n", IN_FROM_REG(r));
166}
167
168static ssize_t get_in_min(struct device *dev, struct device_attribute *attr,
169 char *buf)
170{
171 int n = to_sensor_dev_attr(attr)->index;
172 struct gl520_data *data = gl520_update_device(dev);
173 u8 r = data->in_min[n];
174
175 if (n == 0)
176 return sprintf(buf, "%d\n", VDD_FROM_REG(r));
177 else
178 return sprintf(buf, "%d\n", IN_FROM_REG(r));
179}
180
181static ssize_t get_in_max(struct device *dev, struct device_attribute *attr,
182 char *buf)
183{
184 int n = to_sensor_dev_attr(attr)->index;
185 struct gl520_data *data = gl520_update_device(dev);
186 u8 r = data->in_max[n];
187
188 if (n == 0)
189 return sprintf(buf, "%d\n", VDD_FROM_REG(r));
190 else
191 return sprintf(buf, "%d\n", IN_FROM_REG(r));
192}
193
194static ssize_t set_in_min(struct device *dev, struct device_attribute *attr,
195 const char *buf, size_t count)
196{
197 struct i2c_client *client = to_i2c_client(dev);
198 struct gl520_data *data = i2c_get_clientdata(client);
199 int n = to_sensor_dev_attr(attr)->index;
200 long v = simple_strtol(buf, NULL, 10);
201 u8 r;
202
203 mutex_lock(&data->update_lock);
204
205 if (n == 0)
206 r = VDD_TO_REG(v);
207 else
208 r = IN_TO_REG(v);
209
210 data->in_min[n] = r;
211
212 if (n < 4)
213 gl520_write_value(client, GL520_REG_IN_MIN[n],
214 (gl520_read_value(client, GL520_REG_IN_MIN[n])
215 & ~0xff) | r);
216 else
217 gl520_write_value(client, GL520_REG_IN_MIN[n], r);
218
219 mutex_unlock(&data->update_lock);
220 return count;
221}
222
223static ssize_t set_in_max(struct device *dev, struct device_attribute *attr,
224 const char *buf, size_t count)
225{
226 struct i2c_client *client = to_i2c_client(dev);
227 struct gl520_data *data = i2c_get_clientdata(client);
228 int n = to_sensor_dev_attr(attr)->index;
229 long v = simple_strtol(buf, NULL, 10);
230 u8 r;
231
232 if (n == 0)
233 r = VDD_TO_REG(v);
234 else
235 r = IN_TO_REG(v);
236
237 mutex_lock(&data->update_lock);
238
239 data->in_max[n] = r;
240
241 if (n < 4)
242 gl520_write_value(client, GL520_REG_IN_MAX[n],
243 (gl520_read_value(client, GL520_REG_IN_MAX[n])
244 & ~0xff00) | (r << 8));
245 else
246 gl520_write_value(client, GL520_REG_IN_MAX[n], r);
247
248 mutex_unlock(&data->update_lock);
249 return count;
250}
251
252static SENSOR_DEVICE_ATTR(in0_input, S_IRUGO, get_in_input, NULL, 0);
253static SENSOR_DEVICE_ATTR(in1_input, S_IRUGO, get_in_input, NULL, 1);
254static SENSOR_DEVICE_ATTR(in2_input, S_IRUGO, get_in_input, NULL, 2);
255static SENSOR_DEVICE_ATTR(in3_input, S_IRUGO, get_in_input, NULL, 3);
256static SENSOR_DEVICE_ATTR(in4_input, S_IRUGO, get_in_input, NULL, 4);
257static SENSOR_DEVICE_ATTR(in0_min, S_IRUGO | S_IWUSR,
258 get_in_min, set_in_min, 0);
259static SENSOR_DEVICE_ATTR(in1_min, S_IRUGO | S_IWUSR,
260 get_in_min, set_in_min, 1);
261static SENSOR_DEVICE_ATTR(in2_min, S_IRUGO | S_IWUSR,
262 get_in_min, set_in_min, 2);
263static SENSOR_DEVICE_ATTR(in3_min, S_IRUGO | S_IWUSR,
264 get_in_min, set_in_min, 3);
265static SENSOR_DEVICE_ATTR(in4_min, S_IRUGO | S_IWUSR,
266 get_in_min, set_in_min, 4);
267static SENSOR_DEVICE_ATTR(in0_max, S_IRUGO | S_IWUSR,
268 get_in_max, set_in_max, 0);
269static SENSOR_DEVICE_ATTR(in1_max, S_IRUGO | S_IWUSR,
270 get_in_max, set_in_max, 1);
271static SENSOR_DEVICE_ATTR(in2_max, S_IRUGO | S_IWUSR,
272 get_in_max, set_in_max, 2);
273static SENSOR_DEVICE_ATTR(in3_max, S_IRUGO | S_IWUSR,
274 get_in_max, set_in_max, 3);
275static SENSOR_DEVICE_ATTR(in4_max, S_IRUGO | S_IWUSR,
276 get_in_max, set_in_max, 4);
277
278#define DIV_FROM_REG(val) (1 << (val))
279#define FAN_FROM_REG(val,div) ((val)==0 ? 0 : (480000/((val) << (div))))
280#define FAN_TO_REG(val,div) ((val)<=0?0:SENSORS_LIMIT((480000 + ((val) << ((div)-1))) / ((val) << (div)), 1, 255));
281
282static ssize_t get_fan_input(struct device *dev, struct device_attribute *attr,
283 char *buf)
284{
285 int n = to_sensor_dev_attr(attr)->index;
286 struct gl520_data *data = gl520_update_device(dev);
287
288 return sprintf(buf, "%d\n", FAN_FROM_REG(data->fan_input[n],
289 data->fan_div[n]));
290}
291
292static ssize_t get_fan_min(struct device *dev, struct device_attribute *attr,
293 char *buf)
294{
295 int n = to_sensor_dev_attr(attr)->index;
296 struct gl520_data *data = gl520_update_device(dev);
297
298 return sprintf(buf, "%d\n", FAN_FROM_REG(data->fan_min[n],
299 data->fan_div[n]));
300}
301
302static ssize_t get_fan_div(struct device *dev, struct device_attribute *attr,
303 char *buf)
304{
305 int n = to_sensor_dev_attr(attr)->index;
306 struct gl520_data *data = gl520_update_device(dev);
307
308 return sprintf(buf, "%d\n", DIV_FROM_REG(data->fan_div[n]));
309}
310
311static ssize_t get_fan_off(struct device *dev, struct device_attribute *attr,
312 char *buf)
313{
314 struct gl520_data *data = gl520_update_device(dev);
315 return sprintf(buf, "%d\n", data->fan_off);
316}
317
318static ssize_t set_fan_min(struct device *dev, struct device_attribute *attr,
319 const char *buf, size_t count)
320{
321 struct i2c_client *client = to_i2c_client(dev);
322 struct gl520_data *data = i2c_get_clientdata(client);
323 int n = to_sensor_dev_attr(attr)->index;
324 unsigned long v = simple_strtoul(buf, NULL, 10);
325 u8 r;
326
327 mutex_lock(&data->update_lock);
328 r = FAN_TO_REG(v, data->fan_div[n]);
329 data->fan_min[n] = r;
330
331 if (n == 0)
332 gl520_write_value(client, GL520_REG_FAN_MIN,
333 (gl520_read_value(client, GL520_REG_FAN_MIN)
334 & ~0xff00) | (r << 8));
335 else
336 gl520_write_value(client, GL520_REG_FAN_MIN,
337 (gl520_read_value(client, GL520_REG_FAN_MIN)
338 & ~0xff) | r);
339
340 data->beep_mask = gl520_read_value(client, GL520_REG_BEEP_MASK);
341 if (data->fan_min[n] == 0)
342 data->alarm_mask &= (n == 0) ? ~0x20 : ~0x40;
343 else
344 data->alarm_mask |= (n == 0) ? 0x20 : 0x40;
345 data->beep_mask &= data->alarm_mask;
346 gl520_write_value(client, GL520_REG_BEEP_MASK, data->beep_mask);
347
348 mutex_unlock(&data->update_lock);
349 return count;
350}
351
352static ssize_t set_fan_div(struct device *dev, struct device_attribute *attr,
353 const char *buf, size_t count)
354{
355 struct i2c_client *client = to_i2c_client(dev);
356 struct gl520_data *data = i2c_get_clientdata(client);
357 int n = to_sensor_dev_attr(attr)->index;
358 unsigned long v = simple_strtoul(buf, NULL, 10);
359 u8 r;
360
361 switch (v) {
362 case 1: r = 0; break;
363 case 2: r = 1; break;
364 case 4: r = 2; break;
365 case 8: r = 3; break;
366 default:
367 dev_err(&client->dev, "fan_div value %ld not supported. Choose one of 1, 2, 4 or 8!\n", v);
368 return -EINVAL;
369 }
370
371 mutex_lock(&data->update_lock);
372 data->fan_div[n] = r;
373
374 if (n == 0)
375 gl520_write_value(client, GL520_REG_FAN_DIV,
376 (gl520_read_value(client, GL520_REG_FAN_DIV)
377 & ~0xc0) | (r << 6));
378 else
379 gl520_write_value(client, GL520_REG_FAN_DIV,
380 (gl520_read_value(client, GL520_REG_FAN_DIV)
381 & ~0x30) | (r << 4));
382
383 mutex_unlock(&data->update_lock);
384 return count;
385}
386
387static ssize_t set_fan_off(struct device *dev, struct device_attribute *attr,
388 const char *buf, size_t count)
389{
390 struct i2c_client *client = to_i2c_client(dev);
391 struct gl520_data *data = i2c_get_clientdata(client);
392 u8 r = simple_strtoul(buf, NULL, 10)?1:0;
393
394 mutex_lock(&data->update_lock);
395 data->fan_off = r;
396 gl520_write_value(client, GL520_REG_FAN_OFF,
397 (gl520_read_value(client, GL520_REG_FAN_OFF)
398 & ~0x0c) | (r << 2));
399 mutex_unlock(&data->update_lock);
400 return count;
401}
402
403static SENSOR_DEVICE_ATTR(fan1_input, S_IRUGO, get_fan_input, NULL, 0);
404static SENSOR_DEVICE_ATTR(fan2_input, S_IRUGO, get_fan_input, NULL, 1);
405static SENSOR_DEVICE_ATTR(fan1_min, S_IRUGO | S_IWUSR,
406 get_fan_min, set_fan_min, 0);
407static SENSOR_DEVICE_ATTR(fan2_min, S_IRUGO | S_IWUSR,
408 get_fan_min, set_fan_min, 1);
409static SENSOR_DEVICE_ATTR(fan1_div, S_IRUGO | S_IWUSR,
410 get_fan_div, set_fan_div, 0);
411static SENSOR_DEVICE_ATTR(fan2_div, S_IRUGO | S_IWUSR,
412 get_fan_div, set_fan_div, 1);
413static DEVICE_ATTR(fan1_off, S_IRUGO | S_IWUSR,
414 get_fan_off, set_fan_off);
415
416#define TEMP_FROM_REG(val) (((val) - 130) * 1000)
417#define TEMP_TO_REG(val) (SENSORS_LIMIT(((((val)<0?(val)-500:(val)+500) / 1000)+130),0,255))
418
419static ssize_t get_temp_input(struct device *dev, struct device_attribute *attr,
420 char *buf)
421{
422 int n = to_sensor_dev_attr(attr)->index;
423 struct gl520_data *data = gl520_update_device(dev);
424
425 return sprintf(buf, "%d\n", TEMP_FROM_REG(data->temp_input[n]));
426}
427
428static ssize_t get_temp_max(struct device *dev, struct device_attribute *attr,
429 char *buf)
430{
431 int n = to_sensor_dev_attr(attr)->index;
432 struct gl520_data *data = gl520_update_device(dev);
433
434 return sprintf(buf, "%d\n", TEMP_FROM_REG(data->temp_max[n]));
435}
436
437static ssize_t get_temp_max_hyst(struct device *dev, struct device_attribute
438 *attr, char *buf)
439{
440 int n = to_sensor_dev_attr(attr)->index;
441 struct gl520_data *data = gl520_update_device(dev);
442
443 return sprintf(buf, "%d\n", TEMP_FROM_REG(data->temp_max_hyst[n]));
444}
445
446static ssize_t set_temp_max(struct device *dev, struct device_attribute *attr,
447 const char *buf, size_t count)
448{
449 struct i2c_client *client = to_i2c_client(dev);
450 struct gl520_data *data = i2c_get_clientdata(client);
451 int n = to_sensor_dev_attr(attr)->index;
452 long v = simple_strtol(buf, NULL, 10);
453
454 mutex_lock(&data->update_lock);
455 data->temp_max[n] = TEMP_TO_REG(v);
456 gl520_write_value(client, GL520_REG_TEMP_MAX[n], data->temp_max[n]);
457 mutex_unlock(&data->update_lock);
458 return count;
459}
460
461static ssize_t set_temp_max_hyst(struct device *dev, struct device_attribute
462 *attr, const char *buf, size_t count)
463{
464 struct i2c_client *client = to_i2c_client(dev);
465 struct gl520_data *data = i2c_get_clientdata(client);
466 int n = to_sensor_dev_attr(attr)->index;
467 long v = simple_strtol(buf, NULL, 10);
468
469 mutex_lock(&data->update_lock);
470 data->temp_max_hyst[n] = TEMP_TO_REG(v);
471 gl520_write_value(client, GL520_REG_TEMP_MAX_HYST[n],
472 data->temp_max_hyst[n]);
473 mutex_unlock(&data->update_lock);
474 return count;
475}
476
477static SENSOR_DEVICE_ATTR(temp1_input, S_IRUGO, get_temp_input, NULL, 0);
478static SENSOR_DEVICE_ATTR(temp2_input, S_IRUGO, get_temp_input, NULL, 1);
479static SENSOR_DEVICE_ATTR(temp1_max, S_IRUGO | S_IWUSR,
480 get_temp_max, set_temp_max, 0);
481static SENSOR_DEVICE_ATTR(temp2_max, S_IRUGO | S_IWUSR,
482 get_temp_max, set_temp_max, 1);
483static SENSOR_DEVICE_ATTR(temp1_max_hyst, S_IRUGO | S_IWUSR,
484 get_temp_max_hyst, set_temp_max_hyst, 0);
485static SENSOR_DEVICE_ATTR(temp2_max_hyst, S_IRUGO | S_IWUSR,
486 get_temp_max_hyst, set_temp_max_hyst, 1);
487
488static ssize_t get_alarms(struct device *dev, struct device_attribute *attr,
489 char *buf)
490{
491 struct gl520_data *data = gl520_update_device(dev);
492 return sprintf(buf, "%d\n", data->alarms);
493}
494
495static ssize_t get_beep_enable(struct device *dev, struct device_attribute
496 *attr, char *buf)
497{
498 struct gl520_data *data = gl520_update_device(dev);
499 return sprintf(buf, "%d\n", data->beep_enable);
500}
501
502static ssize_t get_beep_mask(struct device *dev, struct device_attribute *attr,
503 char *buf)
504{
505 struct gl520_data *data = gl520_update_device(dev);
506 return sprintf(buf, "%d\n", data->beep_mask);
507}
508
509static ssize_t set_beep_enable(struct device *dev, struct device_attribute
510 *attr, const char *buf, size_t count)
511{
512 struct i2c_client *client = to_i2c_client(dev);
513 struct gl520_data *data = i2c_get_clientdata(client);
514 u8 r = simple_strtoul(buf, NULL, 10)?0:1;
515
516 mutex_lock(&data->update_lock);
517 data->beep_enable = !r;
518 gl520_write_value(client, GL520_REG_BEEP_ENABLE,
519 (gl520_read_value(client, GL520_REG_BEEP_ENABLE)
520 & ~0x04) | (r << 2));
521 mutex_unlock(&data->update_lock);
522 return count;
523}
524
525static ssize_t set_beep_mask(struct device *dev, struct device_attribute *attr,
526 const char *buf, size_t count)
527{
528 struct i2c_client *client = to_i2c_client(dev);
529 struct gl520_data *data = i2c_get_clientdata(client);
530 u8 r = simple_strtoul(buf, NULL, 10);
531
532 mutex_lock(&data->update_lock);
533 r &= data->alarm_mask;
534 data->beep_mask = r;
535 gl520_write_value(client, GL520_REG_BEEP_MASK, r);
536 mutex_unlock(&data->update_lock);
537 return count;
538}
539
540static DEVICE_ATTR(alarms, S_IRUGO, get_alarms, NULL);
541static DEVICE_ATTR(beep_enable, S_IRUGO | S_IWUSR,
542 get_beep_enable, set_beep_enable);
543static DEVICE_ATTR(beep_mask, S_IRUGO | S_IWUSR,
544 get_beep_mask, set_beep_mask);
545
546static ssize_t get_alarm(struct device *dev, struct device_attribute *attr,
547 char *buf)
548{
549 int bit_nr = to_sensor_dev_attr(attr)->index;
550 struct gl520_data *data = gl520_update_device(dev);
551
552 return sprintf(buf, "%d\n", (data->alarms >> bit_nr) & 1);
553}
554
555static SENSOR_DEVICE_ATTR(in0_alarm, S_IRUGO, get_alarm, NULL, 0);
556static SENSOR_DEVICE_ATTR(in1_alarm, S_IRUGO, get_alarm, NULL, 1);
557static SENSOR_DEVICE_ATTR(in2_alarm, S_IRUGO, get_alarm, NULL, 2);
558static SENSOR_DEVICE_ATTR(in3_alarm, S_IRUGO, get_alarm, NULL, 3);
559static SENSOR_DEVICE_ATTR(temp1_alarm, S_IRUGO, get_alarm, NULL, 4);
560static SENSOR_DEVICE_ATTR(fan1_alarm, S_IRUGO, get_alarm, NULL, 5);
561static SENSOR_DEVICE_ATTR(fan2_alarm, S_IRUGO, get_alarm, NULL, 6);
562static SENSOR_DEVICE_ATTR(temp2_alarm, S_IRUGO, get_alarm, NULL, 7);
563static SENSOR_DEVICE_ATTR(in4_alarm, S_IRUGO, get_alarm, NULL, 7);
564
565static ssize_t get_beep(struct device *dev, struct device_attribute *attr,
566 char *buf)
567{
568 int bitnr = to_sensor_dev_attr(attr)->index;
569 struct gl520_data *data = gl520_update_device(dev);
570
571 return sprintf(buf, "%d\n", (data->beep_mask >> bitnr) & 1);
572}
573
574static ssize_t set_beep(struct device *dev, struct device_attribute *attr,
575 const char *buf, size_t count)
576{
577 struct i2c_client *client = to_i2c_client(dev);
578 struct gl520_data *data = i2c_get_clientdata(client);
579 int bitnr = to_sensor_dev_attr(attr)->index;
580 unsigned long bit;
581
582 bit = simple_strtoul(buf, NULL, 10);
583 if (bit & ~1)
584 return -EINVAL;
585
586 mutex_lock(&data->update_lock);
587 data->beep_mask = gl520_read_value(client, GL520_REG_BEEP_MASK);
588 if (bit)
589 data->beep_mask |= (1 << bitnr);
590 else
591 data->beep_mask &= ~(1 << bitnr);
592 gl520_write_value(client, GL520_REG_BEEP_MASK, data->beep_mask);
593 mutex_unlock(&data->update_lock);
594 return count;
595}
596
597static SENSOR_DEVICE_ATTR(in0_beep, S_IRUGO | S_IWUSR, get_beep, set_beep, 0);
598static SENSOR_DEVICE_ATTR(in1_beep, S_IRUGO | S_IWUSR, get_beep, set_beep, 1);
599static SENSOR_DEVICE_ATTR(in2_beep, S_IRUGO | S_IWUSR, get_beep, set_beep, 2);
600static SENSOR_DEVICE_ATTR(in3_beep, S_IRUGO | S_IWUSR, get_beep, set_beep, 3);
601static SENSOR_DEVICE_ATTR(temp1_beep, S_IRUGO | S_IWUSR, get_beep, set_beep, 4);
602static SENSOR_DEVICE_ATTR(fan1_beep, S_IRUGO | S_IWUSR, get_beep, set_beep, 5);
603static SENSOR_DEVICE_ATTR(fan2_beep, S_IRUGO | S_IWUSR, get_beep, set_beep, 6);
604static SENSOR_DEVICE_ATTR(temp2_beep, S_IRUGO | S_IWUSR, get_beep, set_beep, 7);
605static SENSOR_DEVICE_ATTR(in4_beep, S_IRUGO | S_IWUSR, get_beep, set_beep, 7);
606
607static struct attribute *gl520_attributes[] = {
608 &dev_attr_cpu0_vid.attr,
609
610 &sensor_dev_attr_in0_input.dev_attr.attr,
611 &sensor_dev_attr_in0_min.dev_attr.attr,
612 &sensor_dev_attr_in0_max.dev_attr.attr,
613 &sensor_dev_attr_in0_alarm.dev_attr.attr,
614 &sensor_dev_attr_in0_beep.dev_attr.attr,
615 &sensor_dev_attr_in1_input.dev_attr.attr,
616 &sensor_dev_attr_in1_min.dev_attr.attr,
617 &sensor_dev_attr_in1_max.dev_attr.attr,
618 &sensor_dev_attr_in1_alarm.dev_attr.attr,
619 &sensor_dev_attr_in1_beep.dev_attr.attr,
620 &sensor_dev_attr_in2_input.dev_attr.attr,
621 &sensor_dev_attr_in2_min.dev_attr.attr,
622 &sensor_dev_attr_in2_max.dev_attr.attr,
623 &sensor_dev_attr_in2_alarm.dev_attr.attr,
624 &sensor_dev_attr_in2_beep.dev_attr.attr,
625 &sensor_dev_attr_in3_input.dev_attr.attr,
626 &sensor_dev_attr_in3_min.dev_attr.attr,
627 &sensor_dev_attr_in3_max.dev_attr.attr,
628 &sensor_dev_attr_in3_alarm.dev_attr.attr,
629 &sensor_dev_attr_in3_beep.dev_attr.attr,
630
631 &sensor_dev_attr_fan1_input.dev_attr.attr,
632 &sensor_dev_attr_fan1_min.dev_attr.attr,
633 &sensor_dev_attr_fan1_div.dev_attr.attr,
634 &sensor_dev_attr_fan1_alarm.dev_attr.attr,
635 &sensor_dev_attr_fan1_beep.dev_attr.attr,
636 &dev_attr_fan1_off.attr,
637 &sensor_dev_attr_fan2_input.dev_attr.attr,
638 &sensor_dev_attr_fan2_min.dev_attr.attr,
639 &sensor_dev_attr_fan2_div.dev_attr.attr,
640 &sensor_dev_attr_fan2_alarm.dev_attr.attr,
641 &sensor_dev_attr_fan2_beep.dev_attr.attr,
642
643 &sensor_dev_attr_temp1_input.dev_attr.attr,
644 &sensor_dev_attr_temp1_max.dev_attr.attr,
645 &sensor_dev_attr_temp1_max_hyst.dev_attr.attr,
646 &sensor_dev_attr_temp1_alarm.dev_attr.attr,
647 &sensor_dev_attr_temp1_beep.dev_attr.attr,
648
649 &dev_attr_alarms.attr,
650 &dev_attr_beep_enable.attr,
651 &dev_attr_beep_mask.attr,
652 NULL
653};
654
655static const struct attribute_group gl520_group = {
656 .attrs = gl520_attributes,
657};
658
659static struct attribute *gl520_attributes_opt[] = {
660 &sensor_dev_attr_in4_input.dev_attr.attr,
661 &sensor_dev_attr_in4_min.dev_attr.attr,
662 &sensor_dev_attr_in4_max.dev_attr.attr,
663 &sensor_dev_attr_in4_alarm.dev_attr.attr,
664 &sensor_dev_attr_in4_beep.dev_attr.attr,
665
666 &sensor_dev_attr_temp2_input.dev_attr.attr,
667 &sensor_dev_attr_temp2_max.dev_attr.attr,
668 &sensor_dev_attr_temp2_max_hyst.dev_attr.attr,
669 &sensor_dev_attr_temp2_alarm.dev_attr.attr,
670 &sensor_dev_attr_temp2_beep.dev_attr.attr,
671 NULL
672};
673
674static const struct attribute_group gl520_group_opt = {
675 .attrs = gl520_attributes_opt,
676};
677
678
679/*
680 * Real code
681 */
682
683/* Return 0 if detection is successful, -ENODEV otherwise */
684static int gl520_detect(struct i2c_client *client, int kind,
685 struct i2c_board_info *info)
686{
687 struct i2c_adapter *adapter = client->adapter;
688
689 if (!i2c_check_functionality(adapter, I2C_FUNC_SMBUS_BYTE_DATA |
690 I2C_FUNC_SMBUS_WORD_DATA))
691 return -ENODEV;
692
693 /* Determine the chip type. */
694 if (kind < 0) {
695 if ((gl520_read_value(client, GL520_REG_CHIP_ID) != 0x20) ||
696 ((gl520_read_value(client, GL520_REG_REVISION) & 0x7f) != 0x00) ||
697 ((gl520_read_value(client, GL520_REG_CONF) & 0x80) != 0x00)) {
698 dev_dbg(&client->dev, "Unknown chip type, skipping\n");
699 return -ENODEV;
700 }
701 }
702
703 strlcpy(info->type, "gl520sm", I2C_NAME_SIZE);
704
705 return 0;
706}
707
708static int gl520_probe(struct i2c_client *client,
709 const struct i2c_device_id *id)
710{
711 struct gl520_data *data;
712 int err;
713
714 data = kzalloc(sizeof(struct gl520_data), GFP_KERNEL);
715 if (!data) {
716 err = -ENOMEM;
717 goto exit;
718 }
719
720 i2c_set_clientdata(client, data);
721 mutex_init(&data->update_lock);
722
723 /* Initialize the GL520SM chip */
724 gl520_init_client(client);
725
726 /* Register sysfs hooks */
727 if ((err = sysfs_create_group(&client->dev.kobj, &gl520_group)))
728 goto exit_free;
729
730 if (data->two_temps) {
731 if ((err = device_create_file(&client->dev,
732 &sensor_dev_attr_temp2_input.dev_attr))
733 || (err = device_create_file(&client->dev,
734 &sensor_dev_attr_temp2_max.dev_attr))
735 || (err = device_create_file(&client->dev,
736 &sensor_dev_attr_temp2_max_hyst.dev_attr))
737 || (err = device_create_file(&client->dev,
738 &sensor_dev_attr_temp2_alarm.dev_attr))
739 || (err = device_create_file(&client->dev,
740 &sensor_dev_attr_temp2_beep.dev_attr)))
741 goto exit_remove_files;
742 } else {
743 if ((err = device_create_file(&client->dev,
744 &sensor_dev_attr_in4_input.dev_attr))
745 || (err = device_create_file(&client->dev,
746 &sensor_dev_attr_in4_min.dev_attr))
747 || (err = device_create_file(&client->dev,
748 &sensor_dev_attr_in4_max.dev_attr))
749 || (err = device_create_file(&client->dev,
750 &sensor_dev_attr_in4_alarm.dev_attr))
751 || (err = device_create_file(&client->dev,
752 &sensor_dev_attr_in4_beep.dev_attr)))
753 goto exit_remove_files;
754 }
755
756
757 data->hwmon_dev = hwmon_device_register(&client->dev);
758 if (IS_ERR(data->hwmon_dev)) {
759 err = PTR_ERR(data->hwmon_dev);
760 goto exit_remove_files;
761 }
762
763 return 0;
764
765exit_remove_files:
766 sysfs_remove_group(&client->dev.kobj, &gl520_group);
767 sysfs_remove_group(&client->dev.kobj, &gl520_group_opt);
768exit_free:
769 kfree(data);
770exit:
771 return err;
772}
773
774
775/* Called when we have found a new GL520SM. */
776static void gl520_init_client(struct i2c_client *client)
777{
778 struct gl520_data *data = i2c_get_clientdata(client);
779 u8 oldconf, conf;
780
781 conf = oldconf = gl520_read_value(client, GL520_REG_CONF);
782
783 data->alarm_mask = 0xff;
784 data->vrm = vid_which_vrm();
785
786 if (extra_sensor_type == 1)
787 conf &= ~0x10;
788 else if (extra_sensor_type == 2)
789 conf |= 0x10;
790 data->two_temps = !(conf & 0x10);
791
792 /* If IRQ# is disabled, we can safely force comparator mode */
793 if (!(conf & 0x20))
794 conf &= 0xf7;
795
796 /* Enable monitoring if needed */
797 conf |= 0x40;
798
799 if (conf != oldconf)
800 gl520_write_value(client, GL520_REG_CONF, conf);
801
802 gl520_update_device(&(client->dev));
803
804 if (data->fan_min[0] == 0)
805 data->alarm_mask &= ~0x20;
806 if (data->fan_min[1] == 0)
807 data->alarm_mask &= ~0x40;
808
809 data->beep_mask &= data->alarm_mask;
810 gl520_write_value(client, GL520_REG_BEEP_MASK, data->beep_mask);
811}
812
813static int gl520_remove(struct i2c_client *client)
814{
815 struct gl520_data *data = i2c_get_clientdata(client);
816
817 hwmon_device_unregister(data->hwmon_dev);
818 sysfs_remove_group(&client->dev.kobj, &gl520_group);
819 sysfs_remove_group(&client->dev.kobj, &gl520_group_opt);
820
821 kfree(data);
822 return 0;
823}
824
825
826/* Registers 0x07 to 0x0c are word-sized, others are byte-sized
827 GL520 uses a high-byte first convention */
828static int gl520_read_value(struct i2c_client *client, u8 reg)
829{
830 if ((reg >= 0x07) && (reg <= 0x0c))
831 return swab16(i2c_smbus_read_word_data(client, reg));
832 else
833 return i2c_smbus_read_byte_data(client, reg);
834}
835
836static int gl520_write_value(struct i2c_client *client, u8 reg, u16 value)
837{
838 if ((reg >= 0x07) && (reg <= 0x0c))
839 return i2c_smbus_write_word_data(client, reg, swab16(value));
840 else
841 return i2c_smbus_write_byte_data(client, reg, value);
842}
843
844
845static struct gl520_data *gl520_update_device(struct device *dev)
846{
847 struct i2c_client *client = to_i2c_client(dev);
848 struct gl520_data *data = i2c_get_clientdata(client);
849 int val, i;
850
851 mutex_lock(&data->update_lock);
852
853 if (time_after(jiffies, data->last_updated + 2 * HZ) || !data->valid) {
854
855 dev_dbg(&client->dev, "Starting gl520sm update\n");
856
857 data->alarms = gl520_read_value(client, GL520_REG_ALARMS);
858 data->beep_mask = gl520_read_value(client, GL520_REG_BEEP_MASK);
859 data->vid = gl520_read_value(client, GL520_REG_VID_INPUT) & 0x1f;
860
861 for (i = 0; i < 4; i++) {
862 data->in_input[i] = gl520_read_value(client,
863 GL520_REG_IN_INPUT[i]);
864 val = gl520_read_value(client, GL520_REG_IN_LIMIT[i]);
865 data->in_min[i] = val & 0xff;
866 data->in_max[i] = (val >> 8) & 0xff;
867 }
868
869 val = gl520_read_value(client, GL520_REG_FAN_INPUT);
870 data->fan_input[0] = (val >> 8) & 0xff;
871 data->fan_input[1] = val & 0xff;
872
873 val = gl520_read_value(client, GL520_REG_FAN_MIN);
874 data->fan_min[0] = (val >> 8) & 0xff;
875 data->fan_min[1] = val & 0xff;
876
877 data->temp_input[0] = gl520_read_value(client,
878 GL520_REG_TEMP_INPUT[0]);
879 data->temp_max[0] = gl520_read_value(client,
880 GL520_REG_TEMP_MAX[0]);
881 data->temp_max_hyst[0] = gl520_read_value(client,
882 GL520_REG_TEMP_MAX_HYST[0]);
883
884 val = gl520_read_value(client, GL520_REG_FAN_DIV);
885 data->fan_div[0] = (val >> 6) & 0x03;
886 data->fan_div[1] = (val >> 4) & 0x03;
887 data->fan_off = (val >> 2) & 0x01;
888
889 data->alarms &= data->alarm_mask;
890
891 val = gl520_read_value(client, GL520_REG_CONF);
892 data->beep_enable = !((val >> 2) & 1);
893
894 /* Temp1 and Vin4 are the same input */
895 if (data->two_temps) {
896 data->temp_input[1] = gl520_read_value(client,
897 GL520_REG_TEMP_INPUT[1]);
898 data->temp_max[1] = gl520_read_value(client,
899 GL520_REG_TEMP_MAX[1]);
900 data->temp_max_hyst[1] = gl520_read_value(client,
901 GL520_REG_TEMP_MAX_HYST[1]);
902 } else {
903 data->in_input[4] = gl520_read_value(client,
904 GL520_REG_IN_INPUT[4]);
905 data->in_min[4] = gl520_read_value(client,
906 GL520_REG_IN_MIN[4]);
907 data->in_max[4] = gl520_read_value(client,
908 GL520_REG_IN_MAX[4]);
909 }
910
911 data->last_updated = jiffies;
912 data->valid = 1;
913 }
914
915 mutex_unlock(&data->update_lock);
916
917 return data;
918}
919
920
921static int __init sensors_gl520sm_init(void)
922{
923 return i2c_add_driver(&gl520_driver);
924}
925
926static void __exit sensors_gl520sm_exit(void)
927{
928 i2c_del_driver(&gl520_driver);
929}
930
931
932MODULE_AUTHOR("Frodo Looijaard <frodol@dds.nl>, "
933 "Kyösti Mälkki <kmalkki@cc.hut.fi>, "
934 "Maarten Deprez <maartendeprez@users.sourceforge.net>");
935MODULE_DESCRIPTION("GL520SM driver");
936MODULE_LICENSE("GPL");
937
938module_init(sensors_gl520sm_init);
939module_exit(sensors_gl520sm_exit);
Linux 6.x block layer and io_uring tree(s)