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[net-next-2.6.git] / drivers / hwmon / gl520sm.c
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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
LT		 45
46/* Many GL520 constants specified below
47One of the inputs can be configured as either temp or voltage.
48That's why _TEMP2 and _IN4 access the same register
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 117 .id = I2C_DRIVERID_GL520,
1da177e4
LT		 118 .attach_adapter = gl520_attach_adapter,
119 .detach_client = gl520_detach_client,
120};
121
122/* Client data */
123struct gl520_data {
124 struct i2c_client client;
1beeffe4 125 struct device *hwmon_dev;
9a61bf63 126 struct mutex update_lock;
1da177e4
LT		 127 char valid; /* zero until the following fields are valid */
128 unsigned long last_updated; /* in jiffies */
129
130 u8 vid;
131 u8 vrm;
132 u8 in_input[5]; /* [0] = VVD */
133 u8 in_min[5]; /* [0] = VDD */
134 u8 in_max[5]; /* [0] = VDD */
135 u8 fan_input[2];
136 u8 fan_min[2];
137 u8 fan_div[2];
138 u8 fan_off;
139 u8 temp_input[2];
140 u8 temp_max[2];
141 u8 temp_max_hyst[2];
142 u8 alarms;
143 u8 beep_enable;
144 u8 beep_mask;
145 u8 alarm_mask;
146 u8 two_temps;
147};
148
149/*
150 * Sysfs stuff
151 */
152
153#define sysfs_r(type, n, item, reg) \
154static ssize_t get_##type##item (struct gl520_data *, char *, int); \
30f74292
YI		 155static ssize_t get_##type##n##item (struct device *, struct device_attribute *attr, char *); \
156static ssize_t get_##type##n##item (struct device *dev, struct device_attribute *attr, char *buf) \
1da177e4
LT		 157{ \
158 struct gl520_data *data = gl520_update_device(dev); \
159 return get_##type##item(data, buf, (n)); \
160}
161
162#define sysfs_w(type, n, item, reg) \
163static ssize_t set_##type##item (struct i2c_client *, struct gl520_data *, const char *, size_t, int, int); \
30f74292
YI		 164static ssize_t set_##type##n##item (struct device *, struct device_attribute *attr, const char *, size_t); \
165static ssize_t set_##type##n##item (struct device *dev, struct device_attribute *attr, const char *buf, size_t count) \
1da177e4
LT		 166{ \
167 struct i2c_client *client = to_i2c_client(dev); \
168 struct gl520_data *data = i2c_get_clientdata(client); \
169 return set_##type##item(client, data, buf, count, (n), reg); \
170}
171
172#define sysfs_rw_n(type, n, item, reg) \
173sysfs_r(type, n, item, reg) \
174sysfs_w(type, n, item, reg) \
175static DEVICE_ATTR(type##n##item, S_IRUGO | S_IWUSR, get_##type##n##item, set_##type##n##item);
176
177#define sysfs_ro_n(type, n, item, reg) \
178sysfs_r(type, n, item, reg) \
179static DEVICE_ATTR(type##n##item, S_IRUGO, get_##type##n##item, NULL);
180
181#define sysfs_rw(type, item, reg) \
182sysfs_r(type, 0, item, reg) \
183sysfs_w(type, 0, item, reg) \
184static DEVICE_ATTR(type##item, S_IRUGO | S_IWUSR, get_##type##0##item, set_##type##0##item);
185
186#define sysfs_ro(type, item, reg) \
187sysfs_r(type, 0, item, reg) \
188static DEVICE_ATTR(type##item, S_IRUGO, get_##type##0##item, NULL);
189
190
191#define sysfs_vid(n) \
192sysfs_ro_n(cpu, n, _vid, GL520_REG_VID_INPUT)
193
1da177e4
LT		 194#define sysfs_in(n) \
195sysfs_ro_n(in, n, _input, GL520_REG_IN##n##INPUT) \
196sysfs_rw_n(in, n, _min, GL520_REG_IN##n##_MIN) \
197sysfs_rw_n(in, n, _max, GL520_REG_IN##n##_MAX) \
198
1da177e4
LT		 199#define sysfs_fan(n) \
200sysfs_ro_n(fan, n, _input, GL520_REG_FAN_INPUT) \
201sysfs_rw_n(fan, n, _min, GL520_REG_FAN_MIN) \
202sysfs_rw_n(fan, n, _div, GL520_REG_FAN_DIV)
203
1da177e4
LT		 204#define sysfs_fan_off(n) \
205sysfs_rw_n(fan, n, _off, GL520_REG_FAN_OFF) \
206
1da177e4
LT		 207#define sysfs_temp(n) \
208sysfs_ro_n(temp, n, _input, GL520_REG_TEMP##n##_INPUT) \
209sysfs_rw_n(temp, n, _max, GL520_REG_TEMP##n##_MAX) \
210sysfs_rw_n(temp, n, _max_hyst, GL520_REG_TEMP##n##_MAX_HYST)
211
1da177e4
LT		 212#define sysfs_alarms() \
213sysfs_ro(alarms, , GL520_REG_ALARMS) \
214sysfs_rw(beep_enable, , GL520_REG_BEEP_ENABLE) \
215sysfs_rw(beep_mask, , GL520_REG_BEEP_MASK)
216
1da177e4
LT		 217
218sysfs_vid(0)
219
220sysfs_in(0)
221sysfs_in(1)
222sysfs_in(2)
223sysfs_in(3)
224sysfs_in(4)
225
226sysfs_fan(1)
227sysfs_fan(2)
228sysfs_fan_off(1)
229
230sysfs_temp(1)
231sysfs_temp(2)
232
233sysfs_alarms()
234
235
236static ssize_t get_cpu_vid(struct gl520_data *data, char *buf, int n)
237{
238 return sprintf(buf, "%u\n", vid_from_reg(data->vid, data->vrm));
239}
240
241#define VDD_FROM_REG(val) (((val)*95+2)/4)
242#define VDD_TO_REG(val) (SENSORS_LIMIT((((val)*4+47)/95),0,255))
243
244#define IN_FROM_REG(val) ((val)*19)
245#define IN_TO_REG(val) (SENSORS_LIMIT((((val)+9)/19),0,255))
246
247static ssize_t get_in_input(struct gl520_data *data, char *buf, int n)
248{
249 u8 r = data->in_input[n];
250
251 if (n == 0)
252 return sprintf(buf, "%d\n", VDD_FROM_REG(r));
253 else
254 return sprintf(buf, "%d\n", IN_FROM_REG(r));
255}
256
257static ssize_t get_in_min(struct gl520_data *data, char *buf, int n)
258{
259 u8 r = data->in_min[n];
260
261 if (n == 0)
262 return sprintf(buf, "%d\n", VDD_FROM_REG(r));
263 else
264 return sprintf(buf, "%d\n", IN_FROM_REG(r));
265}
266
267static ssize_t get_in_max(struct gl520_data *data, char *buf, int n)
268{
269 u8 r = data->in_max[n];
270
271 if (n == 0)
272 return sprintf(buf, "%d\n", VDD_FROM_REG(r));
273 else
274 return sprintf(buf, "%d\n", IN_FROM_REG(r));
275}
276
277static ssize_t set_in_min(struct i2c_client *client, struct gl520_data *data, const char *buf, size_t count, int n, int reg)
278{
279 long v = simple_strtol(buf, NULL, 10);
280 u8 r;
281
9a61bf63 282 mutex_lock(&data->update_lock);
1da177e4
LT		 283
284 if (n == 0)
285 r = VDD_TO_REG(v);
286 else
287 r = IN_TO_REG(v);
288
289 data->in_min[n] = r;
290
291 if (n < 4)
292 gl520_write_value(client, reg, (gl520_read_value(client, reg) & ~0xff) | r);
293 else
294 gl520_write_value(client, reg, r);
295
9a61bf63 296 mutex_unlock(&data->update_lock);
1da177e4
LT		 297 return count;
298}
299
300static ssize_t set_in_max(struct i2c_client *client, struct gl520_data *data, const char *buf, size_t count, int n, int reg)
301{
302 long v = simple_strtol(buf, NULL, 10);
303 u8 r;
304
305 if (n == 0)
306 r = VDD_TO_REG(v);
307 else
308 r = IN_TO_REG(v);
309
9a61bf63 310 mutex_lock(&data->update_lock);
1da177e4
LT		 311
312 data->in_max[n] = r;
313
314 if (n < 4)
315 gl520_write_value(client, reg, (gl520_read_value(client, reg) & ~0xff00) | (r << 8));
316 else
317 gl520_write_value(client, reg, r);
318
9a61bf63 319 mutex_unlock(&data->update_lock);
1da177e4
LT		 320 return count;
321}
322
323#define DIV_FROM_REG(val) (1 << (val))
324#define FAN_FROM_REG(val,div) ((val)==0 ? 0 : (480000/((val) << (div))))
325#define FAN_TO_REG(val,div) ((val)<=0?0:SENSORS_LIMIT((480000 + ((val) << ((div)-1))) / ((val) << (div)), 1, 255));
326
327static ssize_t get_fan_input(struct gl520_data *data, char *buf, int n)
328{
329 return sprintf(buf, "%d\n", FAN_FROM_REG(data->fan_input[n - 1], data->fan_div[n - 1]));
330}
331
332static ssize_t get_fan_min(struct gl520_data *data, char *buf, int n)
333{
334 return sprintf(buf, "%d\n", FAN_FROM_REG(data->fan_min[n - 1], data->fan_div[n - 1]));
335}
336
337static ssize_t get_fan_div(struct gl520_data *data, char *buf, int n)
338{
339 return sprintf(buf, "%d\n", DIV_FROM_REG(data->fan_div[n - 1]));
340}
341
342static ssize_t get_fan_off(struct gl520_data *data, char *buf, int n)
343{
344 return sprintf(buf, "%d\n", data->fan_off);
345}
346
347static ssize_t set_fan_min(struct i2c_client *client, struct gl520_data *data, const char *buf, size_t count, int n, int reg)
348{
349 unsigned long v = simple_strtoul(buf, NULL, 10);
350 u8 r;
351
9a61bf63 352 mutex_lock(&data->update_lock);
1da177e4
LT		 353 r = FAN_TO_REG(v, data->fan_div[n - 1]);
354 data->fan_min[n - 1] = r;
355
356 if (n == 1)
357 gl520_write_value(client, reg, (gl520_read_value(client, reg) & ~0xff00) | (r << 8));
358 else
359 gl520_write_value(client, reg, (gl520_read_value(client, reg) & ~0xff) | r);
360
361 data->beep_mask = gl520_read_value(client, GL520_REG_BEEP_MASK);
362 if (data->fan_min[n - 1] == 0)
363 data->alarm_mask &= (n == 1) ? ~0x20 : ~0x40;
364 else
365 data->alarm_mask |= (n == 1) ? 0x20 : 0x40;
366 data->beep_mask &= data->alarm_mask;
367 gl520_write_value(client, GL520_REG_BEEP_MASK, data->beep_mask);
368
9a61bf63 369 mutex_unlock(&data->update_lock);
1da177e4
LT		 370 return count;
371}
372
373static ssize_t set_fan_div(struct i2c_client *client, struct gl520_data *data, const char *buf, size_t count, int n, int reg)
374{
375 unsigned long v = simple_strtoul(buf, NULL, 10);
376 u8 r;
377
378 switch (v) {
379 case 1: r = 0; break;
380 case 2: r = 1; break;
381 case 4: r = 2; break;
382 case 8: r = 3; break;
383 default:
384 dev_err(&client->dev, "fan_div value %ld not supported. Choose one of 1, 2, 4 or 8!\n", v);
385 return -EINVAL;
386 }
387
9a61bf63 388 mutex_lock(&data->update_lock);
1da177e4
LT		 389 data->fan_div[n - 1] = r;
390
391 if (n == 1)
392 gl520_write_value(client, reg, (gl520_read_value(client, reg) & ~0xc0) | (r << 6));
393 else
394 gl520_write_value(client, reg, (gl520_read_value(client, reg) & ~0x30) | (r << 4));
395
9a61bf63 396 mutex_unlock(&data->update_lock);
1da177e4
LT		 397 return count;
398}
399
400static ssize_t set_fan_off(struct i2c_client *client, struct gl520_data *data, const char *buf, size_t count, int n, int reg)
401{
402 u8 r = simple_strtoul(buf, NULL, 10)?1:0;
403
9a61bf63 404 mutex_lock(&data->update_lock);
1da177e4
LT		 405 data->fan_off = r;
406 gl520_write_value(client, reg, (gl520_read_value(client, reg) & ~0x0c) | (r << 2));
9a61bf63 407 mutex_unlock(&data->update_lock);
1da177e4
LT		 408 return count;
409}
410
411#define TEMP_FROM_REG(val) (((val) - 130) * 1000)
412#define TEMP_TO_REG(val) (SENSORS_LIMIT(((((val)<0?(val)-500:(val)+500) / 1000)+130),0,255))
413
414static ssize_t get_temp_input(struct gl520_data *data, char *buf, int n)
415{
416 return sprintf(buf, "%d\n", TEMP_FROM_REG(data->temp_input[n - 1]));
417}
418
419static ssize_t get_temp_max(struct gl520_data *data, char *buf, int n)
420{
421 return sprintf(buf, "%d\n", TEMP_FROM_REG(data->temp_max[n - 1]));
422}
423
424static ssize_t get_temp_max_hyst(struct gl520_data *data, char *buf, int n)
425{
426 return sprintf(buf, "%d\n", TEMP_FROM_REG(data->temp_max_hyst[n - 1]));
427}
428
429static ssize_t set_temp_max(struct i2c_client *client, struct gl520_data *data, const char *buf, size_t count, int n, int reg)
430{
431 long v = simple_strtol(buf, NULL, 10);
432
9a61bf63 433 mutex_lock(&data->update_lock);
53b3531b 434 data->temp_max[n - 1] = TEMP_TO_REG(v);
1da177e4 435 gl520_write_value(client, reg, data->temp_max[n - 1]);
9a61bf63 436 mutex_unlock(&data->update_lock);
1da177e4
LT		 437 return count;
438}
439
440static ssize_t set_temp_max_hyst(struct i2c_client *client, struct gl520_data *data, const char *buf, size_t count, int n, int reg)
441{
442 long v = simple_strtol(buf, NULL, 10);
443
9a61bf63 444 mutex_lock(&data->update_lock);
1da177e4
LT		 445 data->temp_max_hyst[n - 1] = TEMP_TO_REG(v);
446 gl520_write_value(client, reg, data->temp_max_hyst[n - 1]);
9a61bf63 447 mutex_unlock(&data->update_lock);
1da177e4
LT		 448 return count;
449}
450
451static ssize_t get_alarms(struct gl520_data *data, char *buf, int n)
452{
453 return sprintf(buf, "%d\n", data->alarms);
454}
455
456static ssize_t get_beep_enable(struct gl520_data *data, char *buf, int n)
457{
458 return sprintf(buf, "%d\n", data->beep_enable);
459}
460
461static ssize_t get_beep_mask(struct gl520_data *data, char *buf, int n)
462{
463 return sprintf(buf, "%d\n", data->beep_mask);
464}
465
466static ssize_t set_beep_enable(struct i2c_client *client, struct gl520_data *data, const char *buf, size_t count, int n, int reg)
467{
468 u8 r = simple_strtoul(buf, NULL, 10)?0:1;
469
9a61bf63 470 mutex_lock(&data->update_lock);
1da177e4
LT		 471 data->beep_enable = !r;
472 gl520_write_value(client, reg, (gl520_read_value(client, reg) & ~0x04) | (r << 2));
9a61bf63 473 mutex_unlock(&data->update_lock);
1da177e4
LT		 474 return count;
475}
476
477static ssize_t set_beep_mask(struct i2c_client *client, struct gl520_data *data, const char *buf, size_t count, int n, int reg)
478{
479 u8 r = simple_strtoul(buf, NULL, 10);
480
9a61bf63 481 mutex_lock(&data->update_lock);
1da177e4
LT		 482 r &= data->alarm_mask;
483 data->beep_mask = r;
484 gl520_write_value(client, reg, r);
9a61bf63 485 mutex_unlock(&data->update_lock);
1da177e4
LT		 486 return count;
487}
488
87808be4
JD		 489static struct attribute *gl520_attributes[] = {
490 &dev_attr_cpu0_vid.attr,
491
492 &dev_attr_in0_input.attr,
493 &dev_attr_in0_min.attr,
494 &dev_attr_in0_max.attr,
495 &dev_attr_in1_input.attr,
496 &dev_attr_in1_min.attr,
497 &dev_attr_in1_max.attr,
498 &dev_attr_in2_input.attr,
499 &dev_attr_in2_min.attr,
500 &dev_attr_in2_max.attr,
501 &dev_attr_in3_input.attr,
502 &dev_attr_in3_min.attr,
503 &dev_attr_in3_max.attr,
504
505 &dev_attr_fan1_input.attr,
506 &dev_attr_fan1_min.attr,
507 &dev_attr_fan1_div.attr,
508 &dev_attr_fan1_off.attr,
509 &dev_attr_fan2_input.attr,
510 &dev_attr_fan2_min.attr,
511 &dev_attr_fan2_div.attr,
512
513 &dev_attr_temp1_input.attr,
514 &dev_attr_temp1_max.attr,
515 &dev_attr_temp1_max_hyst.attr,
516
517 &dev_attr_alarms.attr,
518 &dev_attr_beep_enable.attr,
519 &dev_attr_beep_mask.attr,
520 NULL
521};
522
523static const struct attribute_group gl520_group = {
524 .attrs = gl520_attributes,
525};
526
527static struct attribute *gl520_attributes_opt[] = {
528 &dev_attr_in4_input.attr,
529 &dev_attr_in4_min.attr,
530 &dev_attr_in4_max.attr,
531
532 &dev_attr_temp2_input.attr,
533 &dev_attr_temp2_max.attr,
534 &dev_attr_temp2_max_hyst.attr,
535 NULL
536};
537
538static const struct attribute_group gl520_group_opt = {
539 .attrs = gl520_attributes_opt,
540};
541
1da177e4
LT		 542
543/*
544 * Real code
545 */
546
547static int gl520_attach_adapter(struct i2c_adapter *adapter)
548{
549 if (!(adapter->class & I2C_CLASS_HWMON))
550 return 0;
2ed2dc3c 551 return i2c_probe(adapter, &addr_data, gl520_detect);
1da177e4
LT		 552}
553
554static int gl520_detect(struct i2c_adapter *adapter, int address, int kind)
555{
556 struct i2c_client *new_client;
557 struct gl520_data *data;
558 int err = 0;
559
560 if (!i2c_check_functionality(adapter, I2C_FUNC_SMBUS_BYTE_DATA |
561 I2C_FUNC_SMBUS_WORD_DATA))
562 goto exit;
563
564 /* OK. For now, we presume we have a valid client. We now create the
565 client structure, even though we cannot fill it completely yet.
566 But it allows us to access gl520_{read,write}_value. */
567
ba9c2e8d 568 if (!(data = kzalloc(sizeof(struct gl520_data), GFP_KERNEL))) {
1da177e4
LT		 569 err = -ENOMEM;
570 goto exit;
571 }
1da177e4
LT		 572
573 new_client = &data->client;
574 i2c_set_clientdata(new_client, data);
575 new_client->addr = address;
576 new_client->adapter = adapter;
577 new_client->driver = &gl520_driver;
578 new_client->flags = 0;
579
580 /* Determine the chip type. */
581 if (kind < 0) {
582 if ((gl520_read_value(new_client, GL520_REG_CHIP_ID) != 0x20) ||
583 ((gl520_read_value(new_client, GL520_REG_REVISION) & 0x7f) != 0x00) ||
584 ((gl520_read_value(new_client, GL520_REG_CONF) & 0x80) != 0x00)) {
585 dev_dbg(&new_client->dev, "Unknown chip type, skipping\n");
586 goto exit_free;
587 }
588 }
589
590 /* Fill in the remaining client fields */
591 strlcpy(new_client->name, "gl520sm", I2C_NAME_SIZE);
592 data->valid = 0;
9a61bf63 593 mutex_init(&data->update_lock);
1da177e4
LT		 594
595 /* Tell the I2C layer a new client has arrived */
596 if ((err = i2c_attach_client(new_client)))
597 goto exit_free;
598
599 /* Initialize the GL520SM chip */
600 gl520_init_client(new_client);
601
602 /* Register sysfs hooks */
87808be4 603 if ((err = sysfs_create_group(&new_client->dev.kobj, &gl520_group)))
943b0830 604 goto exit_detach;
1da177e4 605
87808be4
JD		 606 if (data->two_temps) {
607 if ((err = device_create_file(&new_client->dev,
608 &dev_attr_temp2_input))
609 || (err = device_create_file(&new_client->dev,
610 &dev_attr_temp2_max))
611 || (err = device_create_file(&new_client->dev,
612 &dev_attr_temp2_max_hyst)))
613 goto exit_remove_files;
614 } else {
615 if ((err = device_create_file(&new_client->dev,
616 &dev_attr_in4_input))
617 || (err = device_create_file(&new_client->dev,
618 &dev_attr_in4_min))
619 || (err = device_create_file(&new_client->dev,
620 &dev_attr_in4_max)))
621 goto exit_remove_files;
622 }
1da177e4 623
1da177e4 624
1beeffe4
TJ		 625 data->hwmon_dev = hwmon_device_register(&new_client->dev);
626 if (IS_ERR(data->hwmon_dev)) {
627 err = PTR_ERR(data->hwmon_dev);
87808be4
JD		 628 goto exit_remove_files;
629 }
1da177e4
LT		 630
631 return 0;
632
87808be4
JD		 633exit_remove_files:
634 sysfs_remove_group(&new_client->dev.kobj, &gl520_group);
635 sysfs_remove_group(&new_client->dev.kobj, &gl520_group_opt);
943b0830
MH		 636exit_detach:
637 i2c_detach_client(new_client);
1da177e4
LT		 638exit_free:
639 kfree(data);
640exit:
641 return err;
642}
643
644
645/* Called when we have found a new GL520SM. */
646static void gl520_init_client(struct i2c_client *client)
647{
648 struct gl520_data *data = i2c_get_clientdata(client);
649 u8 oldconf, conf;
650
651 conf = oldconf = gl520_read_value(client, GL520_REG_CONF);
652
653 data->alarm_mask = 0xff;
303760b4 654 data->vrm = vid_which_vrm();
1da177e4
LT		 655
656 if (extra_sensor_type == 1)
657 conf &= ~0x10;
658 else if (extra_sensor_type == 2)
659 conf |= 0x10;
660 data->two_temps = !(conf & 0x10);
661
662 /* If IRQ# is disabled, we can safely force comparator mode */
663 if (!(conf & 0x20))
664 conf &= 0xf7;
665
666 /* Enable monitoring if needed */
667 conf |= 0x40;
668
669 if (conf != oldconf)
670 gl520_write_value(client, GL520_REG_CONF, conf);
671
672 gl520_update_device(&(client->dev));
673
674 if (data->fan_min[0] == 0)
675 data->alarm_mask &= ~0x20;
676 if (data->fan_min[1] == 0)
677 data->alarm_mask &= ~0x40;
678
679 data->beep_mask &= data->alarm_mask;
680 gl520_write_value(client, GL520_REG_BEEP_MASK, data->beep_mask);
681}
682
683static int gl520_detach_client(struct i2c_client *client)
684{
943b0830 685 struct gl520_data *data = i2c_get_clientdata(client);
1da177e4
LT		 686 int err;
687
1beeffe4 688 hwmon_device_unregister(data->hwmon_dev);
87808be4
JD		 689 sysfs_remove_group(&client->dev.kobj, &gl520_group);
690 sysfs_remove_group(&client->dev.kobj, &gl520_group_opt);
943b0830 691
7bef5594 692 if ((err = i2c_detach_client(client)))
1da177e4 693 return err;
1da177e4 694
943b0830 695 kfree(data);
1da177e4
LT		 696 return 0;
697}
698
699
700/* Registers 0x07 to 0x0c are word-sized, others are byte-sized
701 GL520 uses a high-byte first convention */
702static int gl520_read_value(struct i2c_client *client, u8 reg)
703{
704 if ((reg >= 0x07) && (reg <= 0x0c))
705 return swab16(i2c_smbus_read_word_data(client, reg));
706 else
707 return i2c_smbus_read_byte_data(client, reg);
708}
709
710static int gl520_write_value(struct i2c_client *client, u8 reg, u16 value)
711{
712 if ((reg >= 0x07) && (reg <= 0x0c))
713 return i2c_smbus_write_word_data(client, reg, swab16(value));
714 else
715 return i2c_smbus_write_byte_data(client, reg, value);
716}
717
718
719static struct gl520_data *gl520_update_device(struct device *dev)
720{
721 struct i2c_client *client = to_i2c_client(dev);
722 struct gl520_data *data = i2c_get_clientdata(client);
723 int val;
724
9a61bf63 725 mutex_lock(&data->update_lock);
1da177e4 726
0cacdf29 727 if (time_after(jiffies, data->last_updated + 2 * HZ) || !data->valid) {
1da177e4
LT		 728
729 dev_dbg(&client->dev, "Starting gl520sm update\n");
730
731 data->alarms = gl520_read_value(client, GL520_REG_ALARMS);
732 data->beep_mask = gl520_read_value(client, GL520_REG_BEEP_MASK);
733 data->vid = gl520_read_value(client, GL520_REG_VID_INPUT) & 0x1f;
734
735 val = gl520_read_value(client, GL520_REG_IN0_LIMIT);
736 data->in_min[0] = val & 0xff;
737 data->in_max[0] = (val >> 8) & 0xff;
738 val = gl520_read_value(client, GL520_REG_IN1_LIMIT);
739 data->in_min[1] = val & 0xff;
740 data->in_max[1] = (val >> 8) & 0xff;
741 val = gl520_read_value(client, GL520_REG_IN2_LIMIT);
742 data->in_min[2] = val & 0xff;
743 data->in_max[2] = (val >> 8) & 0xff;
744 val = gl520_read_value(client, GL520_REG_IN3_LIMIT);
745 data->in_min[3] = val & 0xff;
746 data->in_max[3] = (val >> 8) & 0xff;
747
748 val = gl520_read_value(client, GL520_REG_FAN_INPUT);
749 data->fan_input[0] = (val >> 8) & 0xff;
750 data->fan_input[1] = val & 0xff;
751
752 val = gl520_read_value(client, GL520_REG_FAN_MIN);
753 data->fan_min[0] = (val >> 8) & 0xff;
754 data->fan_min[1] = val & 0xff;
755
756 data->temp_input[0] = gl520_read_value(client, GL520_REG_TEMP1_INPUT);
757 data->temp_max[0] = gl520_read_value(client, GL520_REG_TEMP1_MAX);
758 data->temp_max_hyst[0] = gl520_read_value(client, GL520_REG_TEMP1_MAX_HYST);
759
760 val = gl520_read_value(client, GL520_REG_FAN_DIV);
761 data->fan_div[0] = (val >> 6) & 0x03;
762 data->fan_div[1] = (val >> 4) & 0x03;
763 data->fan_off = (val >> 2) & 0x01;
764
765 data->alarms &= data->alarm_mask;
766
767 val = gl520_read_value(client, GL520_REG_CONF);
768 data->beep_enable = !((val >> 2) & 1);
769
770 data->in_input[0] = gl520_read_value(client, GL520_REG_IN0_INPUT);
771 data->in_input[1] = gl520_read_value(client, GL520_REG_IN1_INPUT);
772 data->in_input[2] = gl520_read_value(client, GL520_REG_IN2_INPUT);
773 data->in_input[3] = gl520_read_value(client, GL520_REG_IN3_INPUT);
774
775 /* Temp1 and Vin4 are the same input */
776 if (data->two_temps) {
777 data->temp_input[1] = gl520_read_value(client, GL520_REG_TEMP2_INPUT);
778 data->temp_max[1] = gl520_read_value(client, GL520_REG_TEMP2_MAX);
779 data->temp_max_hyst[1] = gl520_read_value(client, GL520_REG_TEMP2_MAX_HYST);
780 } else {
781 data->in_input[4] = gl520_read_value(client, GL520_REG_IN4_INPUT);
782 data->in_min[4] = gl520_read_value(client, GL520_REG_IN4_MIN);
783 data->in_max[4] = gl520_read_value(client, GL520_REG_IN4_MAX);
784 }
785
786 data->last_updated = jiffies;
787 data->valid = 1;
788 }
789
9a61bf63 790 mutex_unlock(&data->update_lock);
1da177e4
LT		 791
792 return data;
793}
794
795
796static int __init sensors_gl520sm_init(void)
797{
798 return i2c_add_driver(&gl520_driver);
799}
800
801static void __exit sensors_gl520sm_exit(void)
802{
803 i2c_del_driver(&gl520_driver);
804}
805
806
807MODULE_AUTHOR("Frodo Looijaard <frodol@dds.nl>, "
96de0e25 808 "Kyösti Mälkki <kmalkki@cc.hut.fi>, "
1da177e4
LT		 809 "Maarten Deprez <maartendeprez@users.sourceforge.net>");
810MODULE_DESCRIPTION("GL520SM driver");
811MODULE_LICENSE("GPL");
812
813module_init(sensors_gl520sm_init);
814module_exit(sensors_gl520sm_exit);
Clone of davem's net-next-2.6 tree