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hwmon: (gl520sm) Various cleanups
[deliverable/linux.git] / drivers / hwmon / gl520sm.c
CommitLineData
1da177e4
LT		 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>,
96de0e25 5 Kyösti Mälkki <kmalkki@cc.hut.fi>
1da177e4
LT		 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>
0cacdf29 27#include <linux/jiffies.h>
1da177e4 28#include <linux/i2c.h>
943b0830 29#include <linux/hwmon.h>
303760b4 30#include <linux/hwmon-vid.h>
943b0830 31#include <linux/err.h>
9a61bf63 32#include <linux/mutex.h>
87808be4 33#include <linux/sysfs.h>
1da177e4
LT		 34
35/* Type of the extra sensor */
36static unsigned short extra_sensor_type;
37module_param(extra_sensor_type, ushort, 0);
38MODULE_PARM_DESC(extra_sensor_type, "Type of extra sensor (0=autodetect, 1=temperature, 2=voltage)");
39
40/* Addresses to scan */
41static unsigned short normal_i2c[] = { 0x2c, 0x2d, I2C_CLIENT_END };
1da177e4
LT		 42
43/* Insmod parameters */
f4b50261 44I2C_CLIENT_INSMOD_1(gl520sm);
1da177e4 45
f28dc2f7 46/* Many GL520 constants specified below
1da177e4 47One of the inputs can be configured as either temp or voltage.
f28dc2f7 48That's why _TEMP2 and _IN4 access the same register
1da177e4
LT		 49*/
50
51/* The GL520 registers */
52#define GL520_REG_CHIP_ID 0x00
53#define GL520_REG_REVISION 0x01
54#define GL520_REG_CONF 0x03
55#define GL520_REG_MASK 0x11
56
57#define GL520_REG_VID_INPUT 0x02
58
59#define GL520_REG_IN0_INPUT 0x15
60#define GL520_REG_IN0_LIMIT 0x0c
61#define GL520_REG_IN0_MIN GL520_REG_IN0_LIMIT
62#define GL520_REG_IN0_MAX GL520_REG_IN0_LIMIT
63
64#define GL520_REG_IN1_INPUT 0x14
65#define GL520_REG_IN1_LIMIT 0x09
66#define GL520_REG_IN1_MIN GL520_REG_IN1_LIMIT
67#define GL520_REG_IN1_MAX GL520_REG_IN1_LIMIT
68
69#define GL520_REG_IN2_INPUT 0x13
70#define GL520_REG_IN2_LIMIT 0x0a
71#define GL520_REG_IN2_MIN GL520_REG_IN2_LIMIT
72#define GL520_REG_IN2_MAX GL520_REG_IN2_LIMIT
73
74#define GL520_REG_IN3_INPUT 0x0d
75#define GL520_REG_IN3_LIMIT 0x0b
76#define GL520_REG_IN3_MIN GL520_REG_IN3_LIMIT
77#define GL520_REG_IN3_MAX GL520_REG_IN3_LIMIT
78
79#define GL520_REG_IN4_INPUT 0x0e
80#define GL520_REG_IN4_MAX 0x17
81#define GL520_REG_IN4_MIN 0x18
82
83#define GL520_REG_TEMP1_INPUT 0x04
84#define GL520_REG_TEMP1_MAX 0x05
85#define GL520_REG_TEMP1_MAX_HYST 0x06
86
87#define GL520_REG_TEMP2_INPUT 0x0e
88#define GL520_REG_TEMP2_MAX 0x17
89#define GL520_REG_TEMP2_MAX_HYST 0x18
90
91#define GL520_REG_FAN_INPUT 0x07
92#define GL520_REG_FAN_MIN 0x08
93#define GL520_REG_FAN_DIV 0x0f
94#define GL520_REG_FAN_OFF GL520_REG_FAN_DIV
95
96#define GL520_REG_ALARMS 0x12
97#define GL520_REG_BEEP_MASK 0x10
98#define GL520_REG_BEEP_ENABLE GL520_REG_CONF
99
100/*
101 * Function declarations
102 */
103
104static int gl520_attach_adapter(struct i2c_adapter *adapter);
105static int gl520_detect(struct i2c_adapter *adapter, int address, int kind);
106static void gl520_init_client(struct i2c_client *client);
107static int gl520_detach_client(struct i2c_client *client);
108static int gl520_read_value(struct i2c_client *client, u8 reg);
109static int gl520_write_value(struct i2c_client *client, u8 reg, u16 value);
110static struct gl520_data *gl520_update_device(struct device *dev);
111
112/* Driver data */
113static struct i2c_driver gl520_driver = {
cdaf7934 114 .driver = {
cdaf7934
LR		 115 .name = "gl520sm",
116 },
1da177e4
LT		 117 .attach_adapter = gl520_attach_adapter,
118 .detach_client = gl520_detach_client,
119};
120
121/* Client data */
122struct gl520_data {
123 struct i2c_client client;
1beeffe4 124 struct device *hwmon_dev;
9a61bf63 125 struct mutex update_lock;
1da177e4
LT		 126 char valid; /* zero until the following fields are valid */
127 unsigned long last_updated; /* in jiffies */
128
129 u8 vid;
130 u8 vrm;
131 u8 in_input[5]; /* [0] = VVD */
132 u8 in_min[5]; /* [0] = VDD */
133 u8 in_max[5]; /* [0] = VDD */
134 u8 fan_input[2];
135 u8 fan_min[2];
136 u8 fan_div[2];
137 u8 fan_off;
138 u8 temp_input[2];
139 u8 temp_max[2];
140 u8 temp_max_hyst[2];
141 u8 alarms;
142 u8 beep_enable;
143 u8 beep_mask;
144 u8 alarm_mask;
145 u8 two_temps;
146};
147
148/*
149 * Sysfs stuff
150 */
151
152#define sysfs_r(type, n, item, reg) \
153static ssize_t get_##type##item (struct gl520_data *, char *, int); \
30f74292
YI		 154static ssize_t get_##type##n##item (struct device *, struct device_attribute *attr, char *); \
155static ssize_t get_##type##n##item (struct device *dev, struct device_attribute *attr, char *buf) \
1da177e4
LT		 156{ \
157 struct gl520_data *data = gl520_update_device(dev); \
158 return get_##type##item(data, buf, (n)); \
159}
160
161#define sysfs_w(type, n, item, reg) \
162static ssize_t set_##type##item (struct i2c_client *, struct gl520_data *, const char *, size_t, int, int); \
30f74292
YI		 163static ssize_t set_##type##n##item (struct device *, struct device_attribute *attr, const char *, size_t); \
164static ssize_t set_##type##n##item (struct device *dev, struct device_attribute *attr, const char *buf, size_t count) \
1da177e4
LT		 165{ \
166 struct i2c_client *client = to_i2c_client(dev); \
167 struct gl520_data *data = i2c_get_clientdata(client); \
168 return set_##type##item(client, data, buf, count, (n), reg); \
169}
170
171#define sysfs_rw_n(type, n, item, reg) \
172sysfs_r(type, n, item, reg) \
173sysfs_w(type, n, item, reg) \
174static DEVICE_ATTR(type##n##item, S_IRUGO | S_IWUSR, get_##type##n##item, set_##type##n##item);
175
176#define sysfs_ro_n(type, n, item, reg) \
177sysfs_r(type, n, item, reg) \
178static DEVICE_ATTR(type##n##item, S_IRUGO, get_##type##n##item, NULL);
179
180#define sysfs_rw(type, item, reg) \
181sysfs_r(type, 0, item, reg) \
182sysfs_w(type, 0, item, reg) \
183static DEVICE_ATTR(type##item, S_IRUGO | S_IWUSR, get_##type##0##item, set_##type##0##item);
184
185#define sysfs_ro(type, item, reg) \
186sysfs_r(type, 0, item, reg) \
187static DEVICE_ATTR(type##item, S_IRUGO, get_##type##0##item, NULL);
188
189
190#define sysfs_vid(n) \
191sysfs_ro_n(cpu, n, _vid, GL520_REG_VID_INPUT)
192
1da177e4
LT		 193#define sysfs_in(n) \
194sysfs_ro_n(in, n, _input, GL520_REG_IN##n##INPUT) \
195sysfs_rw_n(in, n, _min, GL520_REG_IN##n##_MIN) \
f28dc2f7 196sysfs_rw_n(in, n, _max, GL520_REG_IN##n##_MAX)
1da177e4 197
1da177e4
LT		 198#define sysfs_fan(n) \
199sysfs_ro_n(fan, n, _input, GL520_REG_FAN_INPUT) \
200sysfs_rw_n(fan, n, _min, GL520_REG_FAN_MIN) \
201sysfs_rw_n(fan, n, _div, GL520_REG_FAN_DIV)
202
1da177e4 203#define sysfs_fan_off(n) \
f28dc2f7 204sysfs_rw_n(fan, n, _off, GL520_REG_FAN_OFF)
1da177e4 205
1da177e4
LT		 206#define sysfs_temp(n) \
207sysfs_ro_n(temp, n, _input, GL520_REG_TEMP##n##_INPUT) \
208sysfs_rw_n(temp, n, _max, GL520_REG_TEMP##n##_MAX) \
209sysfs_rw_n(temp, n, _max_hyst, GL520_REG_TEMP##n##_MAX_HYST)
210
1da177e4
LT		 211#define sysfs_alarms() \
212sysfs_ro(alarms, , GL520_REG_ALARMS) \
213sysfs_rw(beep_enable, , GL520_REG_BEEP_ENABLE) \
214sysfs_rw(beep_mask, , GL520_REG_BEEP_MASK)
215
1da177e4
LT		 216
217sysfs_vid(0)
218
219sysfs_in(0)
220sysfs_in(1)
221sysfs_in(2)
222sysfs_in(3)
223sysfs_in(4)
224
225sysfs_fan(1)
226sysfs_fan(2)
227sysfs_fan_off(1)
228
229sysfs_temp(1)
230sysfs_temp(2)
231
232sysfs_alarms()
233
234
235static ssize_t get_cpu_vid(struct gl520_data *data, char *buf, int n)
236{
237 return sprintf(buf, "%u\n", vid_from_reg(data->vid, data->vrm));
238}
239
240#define VDD_FROM_REG(val) (((val)*95+2)/4)
241#define VDD_TO_REG(val) (SENSORS_LIMIT((((val)*4+47)/95),0,255))
242
243#define IN_FROM_REG(val) ((val)*19)
244#define IN_TO_REG(val) (SENSORS_LIMIT((((val)+9)/19),0,255))
245
246static ssize_t get_in_input(struct gl520_data *data, char *buf, int n)
247{
248 u8 r = data->in_input[n];
249
250 if (n == 0)
251 return sprintf(buf, "%d\n", VDD_FROM_REG(r));
252 else
253 return sprintf(buf, "%d\n", IN_FROM_REG(r));
254}
255
256static ssize_t get_in_min(struct gl520_data *data, char *buf, int n)
257{
258 u8 r = data->in_min[n];
259
260 if (n == 0)
261 return sprintf(buf, "%d\n", VDD_FROM_REG(r));
262 else
263 return sprintf(buf, "%d\n", IN_FROM_REG(r));
264}
265
266static ssize_t get_in_max(struct gl520_data *data, char *buf, int n)
267{
268 u8 r = data->in_max[n];
269
270 if (n == 0)
271 return sprintf(buf, "%d\n", VDD_FROM_REG(r));
272 else
273 return sprintf(buf, "%d\n", IN_FROM_REG(r));
274}
275
276static ssize_t set_in_min(struct i2c_client *client, struct gl520_data *data, const char *buf, size_t count, int n, int reg)
277{
278 long v = simple_strtol(buf, NULL, 10);
279 u8 r;
280
9a61bf63 281 mutex_lock(&data->update_lock);
1da177e4
LT		 282
283 if (n == 0)
284 r = VDD_TO_REG(v);
285 else
286 r = IN_TO_REG(v);
287
288 data->in_min[n] = r;
289
290 if (n < 4)
291 gl520_write_value(client, reg, (gl520_read_value(client, reg) & ~0xff) | r);
292 else
293 gl520_write_value(client, reg, r);
294
9a61bf63 295 mutex_unlock(&data->update_lock);
1da177e4
LT		 296 return count;
297}
298
299static ssize_t set_in_max(struct i2c_client *client, struct gl520_data *data, const char *buf, size_t count, int n, int reg)
300{
301 long v = simple_strtol(buf, NULL, 10);
302 u8 r;
303
304 if (n == 0)
305 r = VDD_TO_REG(v);
306 else
307 r = IN_TO_REG(v);
308
9a61bf63 309 mutex_lock(&data->update_lock);
1da177e4
LT		 310
311 data->in_max[n] = r;
312
313 if (n < 4)
314 gl520_write_value(client, reg, (gl520_read_value(client, reg) & ~0xff00) | (r << 8));
315 else
316 gl520_write_value(client, reg, r);
317
9a61bf63 318 mutex_unlock(&data->update_lock);
1da177e4
LT		 319 return count;
320}
321
322#define DIV_FROM_REG(val) (1 << (val))
323#define FAN_FROM_REG(val,div) ((val)==0 ? 0 : (480000/((val) << (div))))
324#define FAN_TO_REG(val,div) ((val)<=0?0:SENSORS_LIMIT((480000 + ((val) << ((div)-1))) / ((val) << (div)), 1, 255));
325
326static ssize_t get_fan_input(struct gl520_data *data, char *buf, int n)
327{
328 return sprintf(buf, "%d\n", FAN_FROM_REG(data->fan_input[n - 1], data->fan_div[n - 1]));
329}
330
331static ssize_t get_fan_min(struct gl520_data *data, char *buf, int n)
332{
333 return sprintf(buf, "%d\n", FAN_FROM_REG(data->fan_min[n - 1], data->fan_div[n - 1]));
334}
335
336static ssize_t get_fan_div(struct gl520_data *data, char *buf, int n)
337{
338 return sprintf(buf, "%d\n", DIV_FROM_REG(data->fan_div[n - 1]));
339}
340
341static ssize_t get_fan_off(struct gl520_data *data, char *buf, int n)
342{
343 return sprintf(buf, "%d\n", data->fan_off);
344}
345
346static ssize_t set_fan_min(struct i2c_client *client, struct gl520_data *data, const char *buf, size_t count, int n, int reg)
347{
348 unsigned long v = simple_strtoul(buf, NULL, 10);
349 u8 r;
350
9a61bf63 351 mutex_lock(&data->update_lock);
1da177e4
LT		 352 r = FAN_TO_REG(v, data->fan_div[n - 1]);
353 data->fan_min[n - 1] = r;
354
355 if (n == 1)
356 gl520_write_value(client, reg, (gl520_read_value(client, reg) & ~0xff00) | (r << 8));
357 else
358 gl520_write_value(client, reg, (gl520_read_value(client, reg) & ~0xff) | r);
359
360 data->beep_mask = gl520_read_value(client, GL520_REG_BEEP_MASK);
361 if (data->fan_min[n - 1] == 0)
362 data->alarm_mask &= (n == 1) ? ~0x20 : ~0x40;
363 else
364 data->alarm_mask |= (n == 1) ? 0x20 : 0x40;
365 data->beep_mask &= data->alarm_mask;
366 gl520_write_value(client, GL520_REG_BEEP_MASK, data->beep_mask);
367
9a61bf63 368 mutex_unlock(&data->update_lock);
1da177e4
LT		 369 return count;
370}
371
372static ssize_t set_fan_div(struct i2c_client *client, struct gl520_data *data, const char *buf, size_t count, int n, int reg)
373{
374 unsigned long v = simple_strtoul(buf, NULL, 10);
375 u8 r;
376
377 switch (v) {
378 case 1: r = 0; break;
379 case 2: r = 1; break;
380 case 4: r = 2; break;
381 case 8: r = 3; break;
382 default:
383 dev_err(&client->dev, "fan_div value %ld not supported. Choose one of 1, 2, 4 or 8!\n", v);
384 return -EINVAL;
385 }
386
9a61bf63 387 mutex_lock(&data->update_lock);
1da177e4
LT		 388 data->fan_div[n - 1] = r;
389
390 if (n == 1)
391 gl520_write_value(client, reg, (gl520_read_value(client, reg) & ~0xc0) | (r << 6));
392 else
393 gl520_write_value(client, reg, (gl520_read_value(client, reg) & ~0x30) | (r << 4));
394
9a61bf63 395 mutex_unlock(&data->update_lock);
1da177e4
LT		 396 return count;
397}
398
399static ssize_t set_fan_off(struct i2c_client *client, struct gl520_data *data, const char *buf, size_t count, int n, int reg)
400{
401 u8 r = simple_strtoul(buf, NULL, 10)?1:0;
402
9a61bf63 403 mutex_lock(&data->update_lock);
1da177e4
LT		 404 data->fan_off = r;
405 gl520_write_value(client, reg, (gl520_read_value(client, reg) & ~0x0c) | (r << 2));
9a61bf63 406 mutex_unlock(&data->update_lock);
1da177e4
LT		 407 return count;
408}
409
410#define TEMP_FROM_REG(val) (((val) - 130) * 1000)
411#define TEMP_TO_REG(val) (SENSORS_LIMIT(((((val)<0?(val)-500:(val)+500) / 1000)+130),0,255))
412
413static ssize_t get_temp_input(struct gl520_data *data, char *buf, int n)
414{
415 return sprintf(buf, "%d\n", TEMP_FROM_REG(data->temp_input[n - 1]));
416}
417
418static ssize_t get_temp_max(struct gl520_data *data, char *buf, int n)
419{
420 return sprintf(buf, "%d\n", TEMP_FROM_REG(data->temp_max[n - 1]));
421}
422
423static ssize_t get_temp_max_hyst(struct gl520_data *data, char *buf, int n)
424{
425 return sprintf(buf, "%d\n", TEMP_FROM_REG(data->temp_max_hyst[n - 1]));
426}
427
428static ssize_t set_temp_max(struct i2c_client *client, struct gl520_data *data, const char *buf, size_t count, int n, int reg)
429{
430 long v = simple_strtol(buf, NULL, 10);
431
9a61bf63 432 mutex_lock(&data->update_lock);
53b3531b 433 data->temp_max[n - 1] = TEMP_TO_REG(v);
1da177e4 434 gl520_write_value(client, reg, data->temp_max[n - 1]);
9a61bf63 435 mutex_unlock(&data->update_lock);
1da177e4
LT		 436 return count;
437}
438
439static ssize_t set_temp_max_hyst(struct i2c_client *client, struct gl520_data *data, const char *buf, size_t count, int n, int reg)
440{
441 long v = simple_strtol(buf, NULL, 10);
442
9a61bf63 443 mutex_lock(&data->update_lock);
1da177e4
LT		 444 data->temp_max_hyst[n - 1] = TEMP_TO_REG(v);
445 gl520_write_value(client, reg, data->temp_max_hyst[n - 1]);
9a61bf63 446 mutex_unlock(&data->update_lock);
1da177e4
LT		 447 return count;
448}
449
450static ssize_t get_alarms(struct gl520_data *data, char *buf, int n)
451{
452 return sprintf(buf, "%d\n", data->alarms);
453}
454
455static ssize_t get_beep_enable(struct gl520_data *data, char *buf, int n)
456{
457 return sprintf(buf, "%d\n", data->beep_enable);
458}
459
460static ssize_t get_beep_mask(struct gl520_data *data, char *buf, int n)
461{
462 return sprintf(buf, "%d\n", data->beep_mask);
463}
464
465static ssize_t set_beep_enable(struct i2c_client *client, struct gl520_data *data, const char *buf, size_t count, int n, int reg)
466{
467 u8 r = simple_strtoul(buf, NULL, 10)?0:1;
468
9a61bf63 469 mutex_lock(&data->update_lock);
1da177e4
LT		 470 data->beep_enable = !r;
471 gl520_write_value(client, reg, (gl520_read_value(client, reg) & ~0x04) | (r << 2));
9a61bf63 472 mutex_unlock(&data->update_lock);
1da177e4
LT		 473 return count;
474}
475
476static ssize_t set_beep_mask(struct i2c_client *client, struct gl520_data *data, const char *buf, size_t count, int n, int reg)
477{
478 u8 r = simple_strtoul(buf, NULL, 10);
f28dc2f7 479
9a61bf63 480 mutex_lock(&data->update_lock);
1da177e4
LT		 481 r &= data->alarm_mask;
482 data->beep_mask = r;
483 gl520_write_value(client, reg, r);
9a61bf63 484 mutex_unlock(&data->update_lock);
1da177e4
LT		 485 return count;
486}
487
87808be4
JD		 488static struct attribute *gl520_attributes[] = {
489 &dev_attr_cpu0_vid.attr,
490
491 &dev_attr_in0_input.attr,
492 &dev_attr_in0_min.attr,
493 &dev_attr_in0_max.attr,
494 &dev_attr_in1_input.attr,
495 &dev_attr_in1_min.attr,
496 &dev_attr_in1_max.attr,
497 &dev_attr_in2_input.attr,
498 &dev_attr_in2_min.attr,
499 &dev_attr_in2_max.attr,
500 &dev_attr_in3_input.attr,
501 &dev_attr_in3_min.attr,
502 &dev_attr_in3_max.attr,
503
504 &dev_attr_fan1_input.attr,
505 &dev_attr_fan1_min.attr,
506 &dev_attr_fan1_div.attr,
507 &dev_attr_fan1_off.attr,
508 &dev_attr_fan2_input.attr,
509 &dev_attr_fan2_min.attr,
510 &dev_attr_fan2_div.attr,
511
512 &dev_attr_temp1_input.attr,
513 &dev_attr_temp1_max.attr,
514 &dev_attr_temp1_max_hyst.attr,
515
516 &dev_attr_alarms.attr,
517 &dev_attr_beep_enable.attr,
518 &dev_attr_beep_mask.attr,
519 NULL
520};
521
522static const struct attribute_group gl520_group = {
523 .attrs = gl520_attributes,
524};
525
526static struct attribute *gl520_attributes_opt[] = {
527 &dev_attr_in4_input.attr,
528 &dev_attr_in4_min.attr,
529 &dev_attr_in4_max.attr,
530
531 &dev_attr_temp2_input.attr,
532 &dev_attr_temp2_max.attr,
533 &dev_attr_temp2_max_hyst.attr,
534 NULL
535};
536
537static const struct attribute_group gl520_group_opt = {
538 .attrs = gl520_attributes_opt,
539};
540
1da177e4
LT		 541
542/*
543 * Real code
544 */
545
546static int gl520_attach_adapter(struct i2c_adapter *adapter)
547{
548 if (!(adapter->class & I2C_CLASS_HWMON))
549 return 0;
2ed2dc3c 550 return i2c_probe(adapter, &addr_data, gl520_detect);
1da177e4
LT		 551}
552
553static int gl520_detect(struct i2c_adapter *adapter, int address, int kind)
554{
f28dc2f7 555 struct i2c_client *client;
1da177e4
LT		 556 struct gl520_data *data;
557 int err = 0;
558
559 if (!i2c_check_functionality(adapter, I2C_FUNC_SMBUS_BYTE_DATA |
560 I2C_FUNC_SMBUS_WORD_DATA))
561 goto exit;
562
563 /* OK. For now, we presume we have a valid client. We now create the
564 client structure, even though we cannot fill it completely yet.
565 But it allows us to access gl520_{read,write}_value. */
566
ba9c2e8d 567 if (!(data = kzalloc(sizeof(struct gl520_data), GFP_KERNEL))) {
1da177e4
LT		 568 err = -ENOMEM;
569 goto exit;
570 }
1da177e4 571
f28dc2f7
JD		 572 client = &data->client;
573 i2c_set_clientdata(client, data);
574 client->addr = address;
575 client->adapter = adapter;
576 client->driver = &gl520_driver;
1da177e4
LT		 577
578 /* Determine the chip type. */
579 if (kind < 0) {
f28dc2f7
JD		 580 if ((gl520_read_value(client, GL520_REG_CHIP_ID) != 0x20) ||
581 ((gl520_read_value(client, GL520_REG_REVISION) & 0x7f) != 0x00) ||
582 ((gl520_read_value(client, GL520_REG_CONF) & 0x80) != 0x00)) {
583 dev_dbg(&client->dev, "Unknown chip type, skipping\n");
1da177e4
LT		 584 goto exit_free;
585 }
586 }
587
588 /* Fill in the remaining client fields */
f28dc2f7 589 strlcpy(client->name, "gl520sm", I2C_NAME_SIZE);
9a61bf63 590 mutex_init(&data->update_lock);
1da177e4
LT		 591
592 /* Tell the I2C layer a new client has arrived */
f28dc2f7 593 if ((err = i2c_attach_client(client)))
1da177e4
LT		 594 goto exit_free;
595
596 /* Initialize the GL520SM chip */
f28dc2f7 597 gl520_init_client(client);
1da177e4
LT		 598
599 /* Register sysfs hooks */
f28dc2f7 600 if ((err = sysfs_create_group(&client->dev.kobj, &gl520_group)))
943b0830 601 goto exit_detach;
1da177e4 602
87808be4 603 if (data->two_temps) {
f28dc2f7 604 if ((err = device_create_file(&client->dev,
87808be4 605 &dev_attr_temp2_input))
f28dc2f7 606 || (err = device_create_file(&client->dev,
87808be4 607 &dev_attr_temp2_max))
f28dc2f7 608 || (err = device_create_file(&client->dev,
87808be4
JD		 609 &dev_attr_temp2_max_hyst)))
610 goto exit_remove_files;
611 } else {
f28dc2f7 612 if ((err = device_create_file(&client->dev,
87808be4 613 &dev_attr_in4_input))
f28dc2f7 614 || (err = device_create_file(&client->dev,
87808be4 615 &dev_attr_in4_min))
f28dc2f7 616 || (err = device_create_file(&client->dev,
87808be4
JD		 617 &dev_attr_in4_max)))
618 goto exit_remove_files;
619 }
1da177e4 620
1da177e4 621
f28dc2f7 622 data->hwmon_dev = hwmon_device_register(&client->dev);
1beeffe4
TJ		 623 if (IS_ERR(data->hwmon_dev)) {
624 err = PTR_ERR(data->hwmon_dev);
87808be4
JD		 625 goto exit_remove_files;
626 }
1da177e4
LT		 627
628 return 0;
629
87808be4 630exit_remove_files:
f28dc2f7
JD		 631 sysfs_remove_group(&client->dev.kobj, &gl520_group);
632 sysfs_remove_group(&client->dev.kobj, &gl520_group_opt);
943b0830 633exit_detach:
f28dc2f7 634 i2c_detach_client(client);
1da177e4
LT		 635exit_free:
636 kfree(data);
637exit:
638 return err;
639}
640
641
642/* Called when we have found a new GL520SM. */
643static void gl520_init_client(struct i2c_client *client)
644{
645 struct gl520_data *data = i2c_get_clientdata(client);
646 u8 oldconf, conf;
647
648 conf = oldconf = gl520_read_value(client, GL520_REG_CONF);
649
650 data->alarm_mask = 0xff;
303760b4 651 data->vrm = vid_which_vrm();
1da177e4
LT		 652
653 if (extra_sensor_type == 1)
654 conf &= ~0x10;
655 else if (extra_sensor_type == 2)
656 conf |= 0x10;
657 data->two_temps = !(conf & 0x10);
658
659 /* If IRQ# is disabled, we can safely force comparator mode */
660 if (!(conf & 0x20))
661 conf &= 0xf7;
662
663 /* Enable monitoring if needed */
664 conf |= 0x40;
665
666 if (conf != oldconf)
667 gl520_write_value(client, GL520_REG_CONF, conf);
668
669 gl520_update_device(&(client->dev));
670
671 if (data->fan_min[0] == 0)
672 data->alarm_mask &= ~0x20;
673 if (data->fan_min[1] == 0)
674 data->alarm_mask &= ~0x40;
675
676 data->beep_mask &= data->alarm_mask;
677 gl520_write_value(client, GL520_REG_BEEP_MASK, data->beep_mask);
678}
679
680static int gl520_detach_client(struct i2c_client *client)
681{
943b0830 682 struct gl520_data *data = i2c_get_clientdata(client);
1da177e4
LT		 683 int err;
684
1beeffe4 685 hwmon_device_unregister(data->hwmon_dev);
87808be4
JD		 686 sysfs_remove_group(&client->dev.kobj, &gl520_group);
687 sysfs_remove_group(&client->dev.kobj, &gl520_group_opt);
943b0830 688
7bef5594 689 if ((err = i2c_detach_client(client)))
1da177e4 690 return err;
1da177e4 691
943b0830 692 kfree(data);
1da177e4
LT		 693 return 0;
694}
695
696
f28dc2f7 697/* Registers 0x07 to 0x0c are word-sized, others are byte-sized
1da177e4
LT		 698 GL520 uses a high-byte first convention */
699static int gl520_read_value(struct i2c_client *client, u8 reg)
700{
701 if ((reg >= 0x07) && (reg <= 0x0c))
702 return swab16(i2c_smbus_read_word_data(client, reg));
703 else
704 return i2c_smbus_read_byte_data(client, reg);
705}
706
707static int gl520_write_value(struct i2c_client *client, u8 reg, u16 value)
708{
709 if ((reg >= 0x07) && (reg <= 0x0c))
710 return i2c_smbus_write_word_data(client, reg, swab16(value));
711 else
712 return i2c_smbus_write_byte_data(client, reg, value);
713}
714
715
716static struct gl520_data *gl520_update_device(struct device *dev)
717{
718 struct i2c_client *client = to_i2c_client(dev);
719 struct gl520_data *data = i2c_get_clientdata(client);
720 int val;
721
9a61bf63 722 mutex_lock(&data->update_lock);
1da177e4 723
0cacdf29 724 if (time_after(jiffies, data->last_updated + 2 * HZ) || !data->valid) {
1da177e4
LT		 725
726 dev_dbg(&client->dev, "Starting gl520sm update\n");
727
728 data->alarms = gl520_read_value(client, GL520_REG_ALARMS);
729 data->beep_mask = gl520_read_value(client, GL520_REG_BEEP_MASK);
730 data->vid = gl520_read_value(client, GL520_REG_VID_INPUT) & 0x1f;
731
732 val = gl520_read_value(client, GL520_REG_IN0_LIMIT);
733 data->in_min[0] = val & 0xff;
734 data->in_max[0] = (val >> 8) & 0xff;
735 val = gl520_read_value(client, GL520_REG_IN1_LIMIT);
736 data->in_min[1] = val & 0xff;
737 data->in_max[1] = (val >> 8) & 0xff;
738 val = gl520_read_value(client, GL520_REG_IN2_LIMIT);
739 data->in_min[2] = val & 0xff;
740 data->in_max[2] = (val >> 8) & 0xff;
741 val = gl520_read_value(client, GL520_REG_IN3_LIMIT);
742 data->in_min[3] = val & 0xff;
743 data->in_max[3] = (val >> 8) & 0xff;
744
745 val = gl520_read_value(client, GL520_REG_FAN_INPUT);
746 data->fan_input[0] = (val >> 8) & 0xff;
747 data->fan_input[1] = val & 0xff;
748
749 val = gl520_read_value(client, GL520_REG_FAN_MIN);
750 data->fan_min[0] = (val >> 8) & 0xff;
751 data->fan_min[1] = val & 0xff;
752
753 data->temp_input[0] = gl520_read_value(client, GL520_REG_TEMP1_INPUT);
754 data->temp_max[0] = gl520_read_value(client, GL520_REG_TEMP1_MAX);
755 data->temp_max_hyst[0] = gl520_read_value(client, GL520_REG_TEMP1_MAX_HYST);
756
757 val = gl520_read_value(client, GL520_REG_FAN_DIV);
758 data->fan_div[0] = (val >> 6) & 0x03;
759 data->fan_div[1] = (val >> 4) & 0x03;
760 data->fan_off = (val >> 2) & 0x01;
761
762 data->alarms &= data->alarm_mask;
763
764 val = gl520_read_value(client, GL520_REG_CONF);
765 data->beep_enable = !((val >> 2) & 1);
766
767 data->in_input[0] = gl520_read_value(client, GL520_REG_IN0_INPUT);
768 data->in_input[1] = gl520_read_value(client, GL520_REG_IN1_INPUT);
769 data->in_input[2] = gl520_read_value(client, GL520_REG_IN2_INPUT);
770 data->in_input[3] = gl520_read_value(client, GL520_REG_IN3_INPUT);
771
772 /* Temp1 and Vin4 are the same input */
773 if (data->two_temps) {
774 data->temp_input[1] = gl520_read_value(client, GL520_REG_TEMP2_INPUT);
775 data->temp_max[1] = gl520_read_value(client, GL520_REG_TEMP2_MAX);
776 data->temp_max_hyst[1] = gl520_read_value(client, GL520_REG_TEMP2_MAX_HYST);
777 } else {
778 data->in_input[4] = gl520_read_value(client, GL520_REG_IN4_INPUT);
779 data->in_min[4] = gl520_read_value(client, GL520_REG_IN4_MIN);
780 data->in_max[4] = gl520_read_value(client, GL520_REG_IN4_MAX);
781 }
782
783 data->last_updated = jiffies;
784 data->valid = 1;
785 }
786
9a61bf63 787 mutex_unlock(&data->update_lock);
1da177e4
LT		 788
789 return data;
790}
791
792
793static int __init sensors_gl520sm_init(void)
794{
795 return i2c_add_driver(&gl520_driver);
796}
797
798static void __exit sensors_gl520sm_exit(void)
799{
800 i2c_del_driver(&gl520_driver);
801}
802
803
804MODULE_AUTHOR("Frodo Looijaard <frodol@dds.nl>, "
96de0e25 805 "Kyösti Mälkki <kmalkki@cc.hut.fi>, "
1da177e4
LT		 806 "Maarten Deprez <maartendeprez@users.sourceforge.net>");
807MODULE_DESCRIPTION("GL520SM driver");
808MODULE_LICENSE("GPL");
809
810module_init(sensors_gl520sm_init);
811module_exit(sensors_gl520sm_exit);
Linux kernel - Deliverables
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