[CPUFREQ] Fix -Wshadow warning in conservative governor.
[linux-2.6.git] / drivers / hwmon / gl520sm.c
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 */
37 static unsigned short extra_sensor_type;
38 module_param(extra_sensor_type, ushort, 0);
39 MODULE_PARM_DESC(extra_sensor_type, "Type of extra sensor (0=autodetect, 1=temperature, 2=voltage)");
40
41 /* Addresses to scan */
42 static const unsigned short normal_i2c[] = { 0x2c, 0x2d, I2C_CLIENT_END };
43
44 /* Insmod parameters */
45 I2C_CLIENT_INSMOD_1(gl520sm);
46
47 /* Many GL520 constants specified below
48 One of the inputs can be configured as either temp or voltage.
49 That'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
60 static const u8 GL520_REG_IN_INPUT[]    = { 0x15, 0x14, 0x13, 0x0d, 0x0e };
61 static const u8 GL520_REG_IN_LIMIT[]    = { 0x0c, 0x09, 0x0a, 0x0b };
62 static const u8 GL520_REG_IN_MIN[]      = { 0x0c, 0x09, 0x0a, 0x0b, 0x18 };
63 static const u8 GL520_REG_IN_MAX[]      = { 0x0c, 0x09, 0x0a, 0x0b, 0x17 };
64
65 static const u8 GL520_REG_TEMP_INPUT[]          = { 0x04, 0x0e };
66 static const u8 GL520_REG_TEMP_MAX[]            = { 0x05, 0x17 };
67 static 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
82 static int gl520_probe(struct i2c_client *client,
83                        const struct i2c_device_id *id);
84 static int gl520_detect(struct i2c_client *client, int kind,
85                         struct i2c_board_info *info);
86 static void gl520_init_client(struct i2c_client *client);
87 static int gl520_remove(struct i2c_client *client);
88 static int gl520_read_value(struct i2c_client *client, u8 reg);
89 static int gl520_write_value(struct i2c_client *client, u8 reg, u16 value);
90 static struct gl520_data *gl520_update_device(struct device *dev);
91
92 /* Driver data */
93 static const struct i2c_device_id gl520_id[] = {
94         { "gl520sm", gl520sm },
95         { }
96 };
97 MODULE_DEVICE_TABLE(i2c, gl520_id);
98
99 static 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 */
112 struct 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
141 static 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 }
147 static 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
155 static 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
168 static 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
181 static 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
194 static 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
223 static 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
252 static SENSOR_DEVICE_ATTR(in0_input, S_IRUGO, get_in_input, NULL, 0);
253 static SENSOR_DEVICE_ATTR(in1_input, S_IRUGO, get_in_input, NULL, 1);
254 static SENSOR_DEVICE_ATTR(in2_input, S_IRUGO, get_in_input, NULL, 2);
255 static SENSOR_DEVICE_ATTR(in3_input, S_IRUGO, get_in_input, NULL, 3);
256 static SENSOR_DEVICE_ATTR(in4_input, S_IRUGO, get_in_input, NULL, 4);
257 static SENSOR_DEVICE_ATTR(in0_min, S_IRUGO | S_IWUSR,
258                 get_in_min, set_in_min, 0);
259 static SENSOR_DEVICE_ATTR(in1_min, S_IRUGO | S_IWUSR,
260                 get_in_min, set_in_min, 1);
261 static SENSOR_DEVICE_ATTR(in2_min, S_IRUGO | S_IWUSR,
262                 get_in_min, set_in_min, 2);
263 static SENSOR_DEVICE_ATTR(in3_min, S_IRUGO | S_IWUSR,
264                 get_in_min, set_in_min, 3);
265 static SENSOR_DEVICE_ATTR(in4_min, S_IRUGO | S_IWUSR,
266                 get_in_min, set_in_min, 4);
267 static SENSOR_DEVICE_ATTR(in0_max, S_IRUGO | S_IWUSR,
268                 get_in_max, set_in_max, 0);
269 static SENSOR_DEVICE_ATTR(in1_max, S_IRUGO | S_IWUSR,
270                 get_in_max, set_in_max, 1);
271 static SENSOR_DEVICE_ATTR(in2_max, S_IRUGO | S_IWUSR,
272                 get_in_max, set_in_max, 2);
273 static SENSOR_DEVICE_ATTR(in3_max, S_IRUGO | S_IWUSR,
274                 get_in_max, set_in_max, 3);
275 static 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
282 static 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
292 static 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
302 static 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
311 static 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
318 static 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
352 static 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
387 static 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
403 static SENSOR_DEVICE_ATTR(fan1_input, S_IRUGO, get_fan_input, NULL, 0);
404 static SENSOR_DEVICE_ATTR(fan2_input, S_IRUGO, get_fan_input, NULL, 1);
405 static SENSOR_DEVICE_ATTR(fan1_min, S_IRUGO | S_IWUSR,
406                 get_fan_min, set_fan_min, 0);
407 static SENSOR_DEVICE_ATTR(fan2_min, S_IRUGO | S_IWUSR,
408                 get_fan_min, set_fan_min, 1);
409 static SENSOR_DEVICE_ATTR(fan1_div, S_IRUGO | S_IWUSR,
410                 get_fan_div, set_fan_div, 0);
411 static SENSOR_DEVICE_ATTR(fan2_div, S_IRUGO | S_IWUSR,
412                 get_fan_div, set_fan_div, 1);
413 static 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
419 static 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
428 static 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
437 static 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
446 static 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
461 static 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
477 static SENSOR_DEVICE_ATTR(temp1_input, S_IRUGO, get_temp_input, NULL, 0);
478 static SENSOR_DEVICE_ATTR(temp2_input, S_IRUGO, get_temp_input, NULL, 1);
479 static SENSOR_DEVICE_ATTR(temp1_max, S_IRUGO | S_IWUSR,
480                 get_temp_max, set_temp_max, 0);
481 static SENSOR_DEVICE_ATTR(temp2_max, S_IRUGO | S_IWUSR,
482                 get_temp_max, set_temp_max, 1);
483 static SENSOR_DEVICE_ATTR(temp1_max_hyst, S_IRUGO | S_IWUSR,
484                 get_temp_max_hyst, set_temp_max_hyst, 0);
485 static SENSOR_DEVICE_ATTR(temp2_max_hyst, S_IRUGO | S_IWUSR,
486                 get_temp_max_hyst, set_temp_max_hyst, 1);
487
488 static 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
495 static 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
502 static 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
509 static 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
525 static 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
540 static DEVICE_ATTR(alarms, S_IRUGO, get_alarms, NULL);
541 static DEVICE_ATTR(beep_enable, S_IRUGO | S_IWUSR,
542                 get_beep_enable, set_beep_enable);
543 static DEVICE_ATTR(beep_mask, S_IRUGO | S_IWUSR,
544                 get_beep_mask, set_beep_mask);
545
546 static 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
555 static SENSOR_DEVICE_ATTR(in0_alarm, S_IRUGO, get_alarm, NULL, 0);
556 static SENSOR_DEVICE_ATTR(in1_alarm, S_IRUGO, get_alarm, NULL, 1);
557 static SENSOR_DEVICE_ATTR(in2_alarm, S_IRUGO, get_alarm, NULL, 2);
558 static SENSOR_DEVICE_ATTR(in3_alarm, S_IRUGO, get_alarm, NULL, 3);
559 static SENSOR_DEVICE_ATTR(temp1_alarm, S_IRUGO, get_alarm, NULL, 4);
560 static SENSOR_DEVICE_ATTR(fan1_alarm, S_IRUGO, get_alarm, NULL, 5);
561 static SENSOR_DEVICE_ATTR(fan2_alarm, S_IRUGO, get_alarm, NULL, 6);
562 static SENSOR_DEVICE_ATTR(temp2_alarm, S_IRUGO, get_alarm, NULL, 7);
563 static SENSOR_DEVICE_ATTR(in4_alarm, S_IRUGO, get_alarm, NULL, 7);
564
565 static 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
574 static 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
597 static SENSOR_DEVICE_ATTR(in0_beep, S_IRUGO | S_IWUSR, get_beep, set_beep, 0);
598 static SENSOR_DEVICE_ATTR(in1_beep, S_IRUGO | S_IWUSR, get_beep, set_beep, 1);
599 static SENSOR_DEVICE_ATTR(in2_beep, S_IRUGO | S_IWUSR, get_beep, set_beep, 2);
600 static SENSOR_DEVICE_ATTR(in3_beep, S_IRUGO | S_IWUSR, get_beep, set_beep, 3);
601 static SENSOR_DEVICE_ATTR(temp1_beep, S_IRUGO | S_IWUSR, get_beep, set_beep, 4);
602 static SENSOR_DEVICE_ATTR(fan1_beep, S_IRUGO | S_IWUSR, get_beep, set_beep, 5);
603 static SENSOR_DEVICE_ATTR(fan2_beep, S_IRUGO | S_IWUSR, get_beep, set_beep, 6);
604 static SENSOR_DEVICE_ATTR(temp2_beep, S_IRUGO | S_IWUSR, get_beep, set_beep, 7);
605 static SENSOR_DEVICE_ATTR(in4_beep, S_IRUGO | S_IWUSR, get_beep, set_beep, 7);
606
607 static 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
655 static const struct attribute_group gl520_group = {
656         .attrs = gl520_attributes,
657 };
658
659 static 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
674 static 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 */
684 static 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
708 static 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
765 exit_remove_files:
766         sysfs_remove_group(&client->dev.kobj, &gl520_group);
767         sysfs_remove_group(&client->dev.kobj, &gl520_group_opt);
768 exit_free:
769         kfree(data);
770 exit:
771         return err;
772 }
773
774
775 /* Called when we have found a new GL520SM. */
776 static 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
813 static 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 */
828 static 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
836 static 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
845 static 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
921 static int __init sensors_gl520sm_init(void)
922 {
923         return i2c_add_driver(&gl520_driver);
924 }
925
926 static void __exit sensors_gl520sm_exit(void)
927 {
928         i2c_del_driver(&gl520_driver);
929 }
930
931
932 MODULE_AUTHOR("Frodo Looijaard <frodol@dds.nl>, "
933         "Kyösti Mälkki <kmalkki@cc.hut.fi>, "
934         "Maarten Deprez <maartendeprez@users.sourceforge.net>");
935 MODULE_DESCRIPTION("GL520SM driver");
936 MODULE_LICENSE("GPL");
937
938 module_init(sensors_gl520sm_init);
939 module_exit(sensors_gl520sm_exit);