hwmon: tegra: tsensor: lp0 save/restore configuration
[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 /* Many GL520 constants specified below
45 One of the inputs can be configured as either temp or voltage.
46 That's why _TEMP2 and _IN4 access the same register
47 */
48
49 /* The GL520 registers */
50 #define GL520_REG_CHIP_ID               0x00
51 #define GL520_REG_REVISION              0x01
52 #define GL520_REG_CONF                  0x03
53 #define GL520_REG_MASK                  0x11
54
55 #define GL520_REG_VID_INPUT             0x02
56
57 static const u8 GL520_REG_IN_INPUT[]    = { 0x15, 0x14, 0x13, 0x0d, 0x0e };
58 static const u8 GL520_REG_IN_LIMIT[]    = { 0x0c, 0x09, 0x0a, 0x0b };
59 static const u8 GL520_REG_IN_MIN[]      = { 0x0c, 0x09, 0x0a, 0x0b, 0x18 };
60 static const u8 GL520_REG_IN_MAX[]      = { 0x0c, 0x09, 0x0a, 0x0b, 0x17 };
61
62 static const u8 GL520_REG_TEMP_INPUT[]          = { 0x04, 0x0e };
63 static const u8 GL520_REG_TEMP_MAX[]            = { 0x05, 0x17 };
64 static const u8 GL520_REG_TEMP_MAX_HYST[]       = { 0x06, 0x18 };
65
66 #define GL520_REG_FAN_INPUT             0x07
67 #define GL520_REG_FAN_MIN               0x08
68 #define GL520_REG_FAN_DIV               0x0f
69 #define GL520_REG_FAN_OFF               GL520_REG_FAN_DIV
70
71 #define GL520_REG_ALARMS                0x12
72 #define GL520_REG_BEEP_MASK             0x10
73 #define GL520_REG_BEEP_ENABLE           GL520_REG_CONF
74
75 /*
76  * Function declarations
77  */
78
79 static int gl520_probe(struct i2c_client *client,
80                        const struct i2c_device_id *id);
81 static int gl520_detect(struct i2c_client *client, struct i2c_board_info *info);
82 static void gl520_init_client(struct i2c_client *client);
83 static int gl520_remove(struct i2c_client *client);
84 static int gl520_read_value(struct i2c_client *client, u8 reg);
85 static int gl520_write_value(struct i2c_client *client, u8 reg, u16 value);
86 static struct gl520_data *gl520_update_device(struct device *dev);
87
88 /* Driver data */
89 static const struct i2c_device_id gl520_id[] = {
90         { "gl520sm", 0 },
91         { }
92 };
93 MODULE_DEVICE_TABLE(i2c, gl520_id);
94
95 static struct i2c_driver gl520_driver = {
96         .class          = I2C_CLASS_HWMON,
97         .driver = {
98                 .name   = "gl520sm",
99         },
100         .probe          = gl520_probe,
101         .remove         = gl520_remove,
102         .id_table       = gl520_id,
103         .detect         = gl520_detect,
104         .address_list   = normal_i2c,
105 };
106
107 /* Client data */
108 struct gl520_data {
109         struct device *hwmon_dev;
110         struct mutex update_lock;
111         char valid;             /* zero until the following fields are valid */
112         unsigned long last_updated;     /* in jiffies */
113
114         u8 vid;
115         u8 vrm;
116         u8 in_input[5];         /* [0] = VVD */
117         u8 in_min[5];           /* [0] = VDD */
118         u8 in_max[5];           /* [0] = VDD */
119         u8 fan_input[2];
120         u8 fan_min[2];
121         u8 fan_div[2];
122         u8 fan_off;
123         u8 temp_input[2];
124         u8 temp_max[2];
125         u8 temp_max_hyst[2];
126         u8 alarms;
127         u8 beep_enable;
128         u8 beep_mask;
129         u8 alarm_mask;
130         u8 two_temps;
131 };
132
133 /*
134  * Sysfs stuff
135  */
136
137 static ssize_t get_cpu_vid(struct device *dev, struct device_attribute *attr,
138                            char *buf)
139 {
140         struct gl520_data *data = gl520_update_device(dev);
141         return sprintf(buf, "%u\n", vid_from_reg(data->vid, data->vrm));
142 }
143 static DEVICE_ATTR(cpu0_vid, S_IRUGO, get_cpu_vid, NULL);
144
145 #define VDD_FROM_REG(val) (((val)*95+2)/4)
146 #define VDD_TO_REG(val) (SENSORS_LIMIT((((val)*4+47)/95),0,255))
147
148 #define IN_FROM_REG(val) ((val)*19)
149 #define IN_TO_REG(val) (SENSORS_LIMIT((((val)+9)/19),0,255))
150
151 static ssize_t get_in_input(struct device *dev, struct device_attribute *attr,
152                             char *buf)
153 {
154         int n = to_sensor_dev_attr(attr)->index;
155         struct gl520_data *data = gl520_update_device(dev);
156         u8 r = data->in_input[n];
157
158         if (n == 0)
159                 return sprintf(buf, "%d\n", VDD_FROM_REG(r));
160         else
161                 return sprintf(buf, "%d\n", IN_FROM_REG(r));
162 }
163
164 static ssize_t get_in_min(struct device *dev, struct device_attribute *attr,
165                           char *buf)
166 {
167         int n = to_sensor_dev_attr(attr)->index;
168         struct gl520_data *data = gl520_update_device(dev);
169         u8 r = data->in_min[n];
170
171         if (n == 0)
172                 return sprintf(buf, "%d\n", VDD_FROM_REG(r));
173         else
174                 return sprintf(buf, "%d\n", IN_FROM_REG(r));
175 }
176
177 static ssize_t get_in_max(struct device *dev, struct device_attribute *attr,
178                           char *buf)
179 {
180         int n = to_sensor_dev_attr(attr)->index;
181         struct gl520_data *data = gl520_update_device(dev);
182         u8 r = data->in_max[n];
183
184         if (n == 0)
185                 return sprintf(buf, "%d\n", VDD_FROM_REG(r));
186         else
187                 return sprintf(buf, "%d\n", IN_FROM_REG(r));
188 }
189
190 static ssize_t set_in_min(struct device *dev, struct device_attribute *attr,
191                           const char *buf, size_t count)
192 {
193         struct i2c_client *client = to_i2c_client(dev);
194         struct gl520_data *data = i2c_get_clientdata(client);
195         int n = to_sensor_dev_attr(attr)->index;
196         long v = simple_strtol(buf, NULL, 10);
197         u8 r;
198
199         mutex_lock(&data->update_lock);
200
201         if (n == 0)
202                 r = VDD_TO_REG(v);
203         else
204                 r = IN_TO_REG(v);
205
206         data->in_min[n] = r;
207
208         if (n < 4)
209                 gl520_write_value(client, GL520_REG_IN_MIN[n],
210                                   (gl520_read_value(client, GL520_REG_IN_MIN[n])
211                                    & ~0xff) | r);
212         else
213                 gl520_write_value(client, GL520_REG_IN_MIN[n], r);
214
215         mutex_unlock(&data->update_lock);
216         return count;
217 }
218
219 static ssize_t set_in_max(struct device *dev, struct device_attribute *attr,
220                           const char *buf, size_t count)
221 {
222         struct i2c_client *client = to_i2c_client(dev);
223         struct gl520_data *data = i2c_get_clientdata(client);
224         int n = to_sensor_dev_attr(attr)->index;
225         long v = simple_strtol(buf, NULL, 10);
226         u8 r;
227
228         if (n == 0)
229                 r = VDD_TO_REG(v);
230         else
231                 r = IN_TO_REG(v);
232
233         mutex_lock(&data->update_lock);
234
235         data->in_max[n] = r;
236
237         if (n < 4)
238                 gl520_write_value(client, GL520_REG_IN_MAX[n],
239                                   (gl520_read_value(client, GL520_REG_IN_MAX[n])
240                                    & ~0xff00) | (r << 8));
241         else
242                 gl520_write_value(client, GL520_REG_IN_MAX[n], r);
243
244         mutex_unlock(&data->update_lock);
245         return count;
246 }
247
248 static SENSOR_DEVICE_ATTR(in0_input, S_IRUGO, get_in_input, NULL, 0);
249 static SENSOR_DEVICE_ATTR(in1_input, S_IRUGO, get_in_input, NULL, 1);
250 static SENSOR_DEVICE_ATTR(in2_input, S_IRUGO, get_in_input, NULL, 2);
251 static SENSOR_DEVICE_ATTR(in3_input, S_IRUGO, get_in_input, NULL, 3);
252 static SENSOR_DEVICE_ATTR(in4_input, S_IRUGO, get_in_input, NULL, 4);
253 static SENSOR_DEVICE_ATTR(in0_min, S_IRUGO | S_IWUSR,
254                 get_in_min, set_in_min, 0);
255 static SENSOR_DEVICE_ATTR(in1_min, S_IRUGO | S_IWUSR,
256                 get_in_min, set_in_min, 1);
257 static SENSOR_DEVICE_ATTR(in2_min, S_IRUGO | S_IWUSR,
258                 get_in_min, set_in_min, 2);
259 static SENSOR_DEVICE_ATTR(in3_min, S_IRUGO | S_IWUSR,
260                 get_in_min, set_in_min, 3);
261 static SENSOR_DEVICE_ATTR(in4_min, S_IRUGO | S_IWUSR,
262                 get_in_min, set_in_min, 4);
263 static SENSOR_DEVICE_ATTR(in0_max, S_IRUGO | S_IWUSR,
264                 get_in_max, set_in_max, 0);
265 static SENSOR_DEVICE_ATTR(in1_max, S_IRUGO | S_IWUSR,
266                 get_in_max, set_in_max, 1);
267 static SENSOR_DEVICE_ATTR(in2_max, S_IRUGO | S_IWUSR,
268                 get_in_max, set_in_max, 2);
269 static SENSOR_DEVICE_ATTR(in3_max, S_IRUGO | S_IWUSR,
270                 get_in_max, set_in_max, 3);
271 static SENSOR_DEVICE_ATTR(in4_max, S_IRUGO | S_IWUSR,
272                 get_in_max, set_in_max, 4);
273
274 #define DIV_FROM_REG(val) (1 << (val))
275 #define FAN_FROM_REG(val,div) ((val)==0 ? 0 : (480000/((val) << (div))))
276 #define FAN_TO_REG(val,div) ((val)<=0?0:SENSORS_LIMIT((480000 + ((val) << ((div)-1))) / ((val) << (div)), 1, 255))
277
278 static ssize_t get_fan_input(struct device *dev, struct device_attribute *attr,
279                              char *buf)
280 {
281         int n = to_sensor_dev_attr(attr)->index;
282         struct gl520_data *data = gl520_update_device(dev);
283
284         return sprintf(buf, "%d\n", FAN_FROM_REG(data->fan_input[n],
285                                                  data->fan_div[n]));
286 }
287
288 static ssize_t get_fan_min(struct device *dev, struct device_attribute *attr,
289                            char *buf)
290 {
291         int n = to_sensor_dev_attr(attr)->index;
292         struct gl520_data *data = gl520_update_device(dev);
293
294         return sprintf(buf, "%d\n", FAN_FROM_REG(data->fan_min[n],
295                                                  data->fan_div[n]));
296 }
297
298 static ssize_t get_fan_div(struct device *dev, struct device_attribute *attr,
299                            char *buf)
300 {
301         int n = to_sensor_dev_attr(attr)->index;
302         struct gl520_data *data = gl520_update_device(dev);
303
304         return sprintf(buf, "%d\n", DIV_FROM_REG(data->fan_div[n]));
305 }
306
307 static ssize_t get_fan_off(struct device *dev, struct device_attribute *attr,
308                            char *buf)
309 {
310         struct gl520_data *data = gl520_update_device(dev);
311         return sprintf(buf, "%d\n", data->fan_off);
312 }
313
314 static ssize_t set_fan_min(struct device *dev, struct device_attribute *attr,
315                            const char *buf, size_t count)
316 {
317         struct i2c_client *client = to_i2c_client(dev);
318         struct gl520_data *data = i2c_get_clientdata(client);
319         int n = to_sensor_dev_attr(attr)->index;
320         unsigned long v = simple_strtoul(buf, NULL, 10);
321         u8 r;
322
323         mutex_lock(&data->update_lock);
324         r = FAN_TO_REG(v, data->fan_div[n]);
325         data->fan_min[n] = r;
326
327         if (n == 0)
328                 gl520_write_value(client, GL520_REG_FAN_MIN,
329                                   (gl520_read_value(client, GL520_REG_FAN_MIN)
330                                    & ~0xff00) | (r << 8));
331         else
332                 gl520_write_value(client, GL520_REG_FAN_MIN,
333                                   (gl520_read_value(client, GL520_REG_FAN_MIN)
334                                    & ~0xff) | r);
335
336         data->beep_mask = gl520_read_value(client, GL520_REG_BEEP_MASK);
337         if (data->fan_min[n] == 0)
338                 data->alarm_mask &= (n == 0) ? ~0x20 : ~0x40;
339         else
340                 data->alarm_mask |= (n == 0) ? 0x20 : 0x40;
341         data->beep_mask &= data->alarm_mask;
342         gl520_write_value(client, GL520_REG_BEEP_MASK, data->beep_mask);
343
344         mutex_unlock(&data->update_lock);
345         return count;
346 }
347
348 static ssize_t set_fan_div(struct device *dev, struct device_attribute *attr,
349                            const char *buf, size_t count)
350 {
351         struct i2c_client *client = to_i2c_client(dev);
352         struct gl520_data *data = i2c_get_clientdata(client);
353         int n = to_sensor_dev_attr(attr)->index;
354         unsigned long v = simple_strtoul(buf, NULL, 10);
355         u8 r;
356
357         switch (v) {
358         case 1: r = 0; break;
359         case 2: r = 1; break;
360         case 4: r = 2; break;
361         case 8: r = 3; break;
362         default:
363                 dev_err(&client->dev, "fan_div value %ld not supported. Choose one of 1, 2, 4 or 8!\n", v);
364                 return -EINVAL;
365         }
366
367         mutex_lock(&data->update_lock);
368         data->fan_div[n] = r;
369
370         if (n == 0)
371                 gl520_write_value(client, GL520_REG_FAN_DIV,
372                                   (gl520_read_value(client, GL520_REG_FAN_DIV)
373                                    & ~0xc0) | (r << 6));
374         else
375                 gl520_write_value(client, GL520_REG_FAN_DIV,
376                                   (gl520_read_value(client, GL520_REG_FAN_DIV)
377                                    & ~0x30) | (r << 4));
378
379         mutex_unlock(&data->update_lock);
380         return count;
381 }
382
383 static ssize_t set_fan_off(struct device *dev, struct device_attribute *attr,
384                            const char *buf, size_t count)
385 {
386         struct i2c_client *client = to_i2c_client(dev);
387         struct gl520_data *data = i2c_get_clientdata(client);
388         u8 r = simple_strtoul(buf, NULL, 10)?1:0;
389
390         mutex_lock(&data->update_lock);
391         data->fan_off = r;
392         gl520_write_value(client, GL520_REG_FAN_OFF,
393                           (gl520_read_value(client, GL520_REG_FAN_OFF)
394                            & ~0x0c) | (r << 2));
395         mutex_unlock(&data->update_lock);
396         return count;
397 }
398
399 static SENSOR_DEVICE_ATTR(fan1_input, S_IRUGO, get_fan_input, NULL, 0);
400 static SENSOR_DEVICE_ATTR(fan2_input, S_IRUGO, get_fan_input, NULL, 1);
401 static SENSOR_DEVICE_ATTR(fan1_min, S_IRUGO | S_IWUSR,
402                 get_fan_min, set_fan_min, 0);
403 static SENSOR_DEVICE_ATTR(fan2_min, S_IRUGO | S_IWUSR,
404                 get_fan_min, set_fan_min, 1);
405 static SENSOR_DEVICE_ATTR(fan1_div, S_IRUGO | S_IWUSR,
406                 get_fan_div, set_fan_div, 0);
407 static SENSOR_DEVICE_ATTR(fan2_div, S_IRUGO | S_IWUSR,
408                 get_fan_div, set_fan_div, 1);
409 static DEVICE_ATTR(fan1_off, S_IRUGO | S_IWUSR,
410                 get_fan_off, set_fan_off);
411
412 #define TEMP_FROM_REG(val) (((val) - 130) * 1000)
413 #define TEMP_TO_REG(val) (SENSORS_LIMIT(((((val)<0?(val)-500:(val)+500) / 1000)+130),0,255))
414
415 static ssize_t get_temp_input(struct device *dev, struct device_attribute *attr,
416                               char *buf)
417 {
418         int n = to_sensor_dev_attr(attr)->index;
419         struct gl520_data *data = gl520_update_device(dev);
420
421         return sprintf(buf, "%d\n", TEMP_FROM_REG(data->temp_input[n]));
422 }
423
424 static ssize_t get_temp_max(struct device *dev, struct device_attribute *attr,
425                             char *buf)
426 {
427         int n = to_sensor_dev_attr(attr)->index;
428         struct gl520_data *data = gl520_update_device(dev);
429
430         return sprintf(buf, "%d\n", TEMP_FROM_REG(data->temp_max[n]));
431 }
432
433 static ssize_t get_temp_max_hyst(struct device *dev, struct device_attribute
434                                  *attr, char *buf)
435 {
436         int n = to_sensor_dev_attr(attr)->index;
437         struct gl520_data *data = gl520_update_device(dev);
438
439         return sprintf(buf, "%d\n", TEMP_FROM_REG(data->temp_max_hyst[n]));
440 }
441
442 static ssize_t set_temp_max(struct device *dev, struct device_attribute *attr,
443                             const char *buf, size_t count)
444 {
445         struct i2c_client *client = to_i2c_client(dev);
446         struct gl520_data *data = i2c_get_clientdata(client);
447         int n = to_sensor_dev_attr(attr)->index;
448         long v = simple_strtol(buf, NULL, 10);
449
450         mutex_lock(&data->update_lock);
451         data->temp_max[n] = TEMP_TO_REG(v);
452         gl520_write_value(client, GL520_REG_TEMP_MAX[n], data->temp_max[n]);
453         mutex_unlock(&data->update_lock);
454         return count;
455 }
456
457 static ssize_t set_temp_max_hyst(struct device *dev, struct device_attribute
458                                  *attr, const char *buf, size_t count)
459 {
460         struct i2c_client *client = to_i2c_client(dev);
461         struct gl520_data *data = i2c_get_clientdata(client);
462         int n = to_sensor_dev_attr(attr)->index;
463         long v = simple_strtol(buf, NULL, 10);
464
465         mutex_lock(&data->update_lock);
466         data->temp_max_hyst[n] = TEMP_TO_REG(v);
467         gl520_write_value(client, GL520_REG_TEMP_MAX_HYST[n],
468                           data->temp_max_hyst[n]);
469         mutex_unlock(&data->update_lock);
470         return count;
471 }
472
473 static SENSOR_DEVICE_ATTR(temp1_input, S_IRUGO, get_temp_input, NULL, 0);
474 static SENSOR_DEVICE_ATTR(temp2_input, S_IRUGO, get_temp_input, NULL, 1);
475 static SENSOR_DEVICE_ATTR(temp1_max, S_IRUGO | S_IWUSR,
476                 get_temp_max, set_temp_max, 0);
477 static SENSOR_DEVICE_ATTR(temp2_max, S_IRUGO | S_IWUSR,
478                 get_temp_max, set_temp_max, 1);
479 static SENSOR_DEVICE_ATTR(temp1_max_hyst, S_IRUGO | S_IWUSR,
480                 get_temp_max_hyst, set_temp_max_hyst, 0);
481 static SENSOR_DEVICE_ATTR(temp2_max_hyst, S_IRUGO | S_IWUSR,
482                 get_temp_max_hyst, set_temp_max_hyst, 1);
483
484 static ssize_t get_alarms(struct device *dev, struct device_attribute *attr,
485                           char *buf)
486 {
487         struct gl520_data *data = gl520_update_device(dev);
488         return sprintf(buf, "%d\n", data->alarms);
489 }
490
491 static ssize_t get_beep_enable(struct device *dev, struct device_attribute
492                                *attr, char *buf)
493 {
494         struct gl520_data *data = gl520_update_device(dev);
495         return sprintf(buf, "%d\n", data->beep_enable);
496 }
497
498 static ssize_t get_beep_mask(struct device *dev, struct device_attribute *attr,
499                              char *buf)
500 {
501         struct gl520_data *data = gl520_update_device(dev);
502         return sprintf(buf, "%d\n", data->beep_mask);
503 }
504
505 static ssize_t set_beep_enable(struct device *dev, struct device_attribute
506                                *attr, const char *buf, size_t count)
507 {
508         struct i2c_client *client = to_i2c_client(dev);
509         struct gl520_data *data = i2c_get_clientdata(client);
510         u8 r = simple_strtoul(buf, NULL, 10)?0:1;
511
512         mutex_lock(&data->update_lock);
513         data->beep_enable = !r;
514         gl520_write_value(client, GL520_REG_BEEP_ENABLE,
515                           (gl520_read_value(client, GL520_REG_BEEP_ENABLE)
516                            & ~0x04) | (r << 2));
517         mutex_unlock(&data->update_lock);
518         return count;
519 }
520
521 static ssize_t set_beep_mask(struct device *dev, struct device_attribute *attr,
522                              const char *buf, size_t count)
523 {
524         struct i2c_client *client = to_i2c_client(dev);
525         struct gl520_data *data = i2c_get_clientdata(client);
526         u8 r = simple_strtoul(buf, NULL, 10);
527
528         mutex_lock(&data->update_lock);
529         r &= data->alarm_mask;
530         data->beep_mask = r;
531         gl520_write_value(client, GL520_REG_BEEP_MASK, r);
532         mutex_unlock(&data->update_lock);
533         return count;
534 }
535
536 static DEVICE_ATTR(alarms, S_IRUGO, get_alarms, NULL);
537 static DEVICE_ATTR(beep_enable, S_IRUGO | S_IWUSR,
538                 get_beep_enable, set_beep_enable);
539 static DEVICE_ATTR(beep_mask, S_IRUGO | S_IWUSR,
540                 get_beep_mask, set_beep_mask);
541
542 static ssize_t get_alarm(struct device *dev, struct device_attribute *attr,
543                          char *buf)
544 {
545         int bit_nr = to_sensor_dev_attr(attr)->index;
546         struct gl520_data *data = gl520_update_device(dev);
547
548         return sprintf(buf, "%d\n", (data->alarms >> bit_nr) & 1);
549 }
550
551 static SENSOR_DEVICE_ATTR(in0_alarm, S_IRUGO, get_alarm, NULL, 0);
552 static SENSOR_DEVICE_ATTR(in1_alarm, S_IRUGO, get_alarm, NULL, 1);
553 static SENSOR_DEVICE_ATTR(in2_alarm, S_IRUGO, get_alarm, NULL, 2);
554 static SENSOR_DEVICE_ATTR(in3_alarm, S_IRUGO, get_alarm, NULL, 3);
555 static SENSOR_DEVICE_ATTR(temp1_alarm, S_IRUGO, get_alarm, NULL, 4);
556 static SENSOR_DEVICE_ATTR(fan1_alarm, S_IRUGO, get_alarm, NULL, 5);
557 static SENSOR_DEVICE_ATTR(fan2_alarm, S_IRUGO, get_alarm, NULL, 6);
558 static SENSOR_DEVICE_ATTR(temp2_alarm, S_IRUGO, get_alarm, NULL, 7);
559 static SENSOR_DEVICE_ATTR(in4_alarm, S_IRUGO, get_alarm, NULL, 7);
560
561 static ssize_t get_beep(struct device *dev, struct device_attribute *attr,
562                         char *buf)
563 {
564         int bitnr = to_sensor_dev_attr(attr)->index;
565         struct gl520_data *data = gl520_update_device(dev);
566
567         return sprintf(buf, "%d\n", (data->beep_mask >> bitnr) & 1);
568 }
569
570 static ssize_t set_beep(struct device *dev, struct device_attribute *attr,
571                         const char *buf, size_t count)
572 {
573         struct i2c_client *client = to_i2c_client(dev);
574         struct gl520_data *data = i2c_get_clientdata(client);
575         int bitnr = to_sensor_dev_attr(attr)->index;
576         unsigned long bit;
577
578         bit = simple_strtoul(buf, NULL, 10);
579         if (bit & ~1)
580                 return -EINVAL;
581
582         mutex_lock(&data->update_lock);
583         data->beep_mask = gl520_read_value(client, GL520_REG_BEEP_MASK);
584         if (bit)
585                 data->beep_mask |= (1 << bitnr);
586         else
587                 data->beep_mask &= ~(1 << bitnr);
588         gl520_write_value(client, GL520_REG_BEEP_MASK, data->beep_mask);
589         mutex_unlock(&data->update_lock);
590         return count;
591 }
592
593 static SENSOR_DEVICE_ATTR(in0_beep, S_IRUGO | S_IWUSR, get_beep, set_beep, 0);
594 static SENSOR_DEVICE_ATTR(in1_beep, S_IRUGO | S_IWUSR, get_beep, set_beep, 1);
595 static SENSOR_DEVICE_ATTR(in2_beep, S_IRUGO | S_IWUSR, get_beep, set_beep, 2);
596 static SENSOR_DEVICE_ATTR(in3_beep, S_IRUGO | S_IWUSR, get_beep, set_beep, 3);
597 static SENSOR_DEVICE_ATTR(temp1_beep, S_IRUGO | S_IWUSR, get_beep, set_beep, 4);
598 static SENSOR_DEVICE_ATTR(fan1_beep, S_IRUGO | S_IWUSR, get_beep, set_beep, 5);
599 static SENSOR_DEVICE_ATTR(fan2_beep, S_IRUGO | S_IWUSR, get_beep, set_beep, 6);
600 static SENSOR_DEVICE_ATTR(temp2_beep, S_IRUGO | S_IWUSR, get_beep, set_beep, 7);
601 static SENSOR_DEVICE_ATTR(in4_beep, S_IRUGO | S_IWUSR, get_beep, set_beep, 7);
602
603 static struct attribute *gl520_attributes[] = {
604         &dev_attr_cpu0_vid.attr,
605
606         &sensor_dev_attr_in0_input.dev_attr.attr,
607         &sensor_dev_attr_in0_min.dev_attr.attr,
608         &sensor_dev_attr_in0_max.dev_attr.attr,
609         &sensor_dev_attr_in0_alarm.dev_attr.attr,
610         &sensor_dev_attr_in0_beep.dev_attr.attr,
611         &sensor_dev_attr_in1_input.dev_attr.attr,
612         &sensor_dev_attr_in1_min.dev_attr.attr,
613         &sensor_dev_attr_in1_max.dev_attr.attr,
614         &sensor_dev_attr_in1_alarm.dev_attr.attr,
615         &sensor_dev_attr_in1_beep.dev_attr.attr,
616         &sensor_dev_attr_in2_input.dev_attr.attr,
617         &sensor_dev_attr_in2_min.dev_attr.attr,
618         &sensor_dev_attr_in2_max.dev_attr.attr,
619         &sensor_dev_attr_in2_alarm.dev_attr.attr,
620         &sensor_dev_attr_in2_beep.dev_attr.attr,
621         &sensor_dev_attr_in3_input.dev_attr.attr,
622         &sensor_dev_attr_in3_min.dev_attr.attr,
623         &sensor_dev_attr_in3_max.dev_attr.attr,
624         &sensor_dev_attr_in3_alarm.dev_attr.attr,
625         &sensor_dev_attr_in3_beep.dev_attr.attr,
626
627         &sensor_dev_attr_fan1_input.dev_attr.attr,
628         &sensor_dev_attr_fan1_min.dev_attr.attr,
629         &sensor_dev_attr_fan1_div.dev_attr.attr,
630         &sensor_dev_attr_fan1_alarm.dev_attr.attr,
631         &sensor_dev_attr_fan1_beep.dev_attr.attr,
632         &dev_attr_fan1_off.attr,
633         &sensor_dev_attr_fan2_input.dev_attr.attr,
634         &sensor_dev_attr_fan2_min.dev_attr.attr,
635         &sensor_dev_attr_fan2_div.dev_attr.attr,
636         &sensor_dev_attr_fan2_alarm.dev_attr.attr,
637         &sensor_dev_attr_fan2_beep.dev_attr.attr,
638
639         &sensor_dev_attr_temp1_input.dev_attr.attr,
640         &sensor_dev_attr_temp1_max.dev_attr.attr,
641         &sensor_dev_attr_temp1_max_hyst.dev_attr.attr,
642         &sensor_dev_attr_temp1_alarm.dev_attr.attr,
643         &sensor_dev_attr_temp1_beep.dev_attr.attr,
644
645         &dev_attr_alarms.attr,
646         &dev_attr_beep_enable.attr,
647         &dev_attr_beep_mask.attr,
648         NULL
649 };
650
651 static const struct attribute_group gl520_group = {
652         .attrs = gl520_attributes,
653 };
654
655 static struct attribute *gl520_attributes_opt[] = {
656         &sensor_dev_attr_in4_input.dev_attr.attr,
657         &sensor_dev_attr_in4_min.dev_attr.attr,
658         &sensor_dev_attr_in4_max.dev_attr.attr,
659         &sensor_dev_attr_in4_alarm.dev_attr.attr,
660         &sensor_dev_attr_in4_beep.dev_attr.attr,
661
662         &sensor_dev_attr_temp2_input.dev_attr.attr,
663         &sensor_dev_attr_temp2_max.dev_attr.attr,
664         &sensor_dev_attr_temp2_max_hyst.dev_attr.attr,
665         &sensor_dev_attr_temp2_alarm.dev_attr.attr,
666         &sensor_dev_attr_temp2_beep.dev_attr.attr,
667         NULL
668 };
669
670 static const struct attribute_group gl520_group_opt = {
671         .attrs = gl520_attributes_opt,
672 };
673
674
675 /*
676  * Real code
677  */
678
679 /* Return 0 if detection is successful, -ENODEV otherwise */
680 static int gl520_detect(struct i2c_client *client, struct i2c_board_info *info)
681 {
682         struct i2c_adapter *adapter = client->adapter;
683
684         if (!i2c_check_functionality(adapter, I2C_FUNC_SMBUS_BYTE_DATA |
685                                      I2C_FUNC_SMBUS_WORD_DATA))
686                 return -ENODEV;
687
688         /* Determine the chip type. */
689         if ((gl520_read_value(client, GL520_REG_CHIP_ID) != 0x20) ||
690             ((gl520_read_value(client, GL520_REG_REVISION) & 0x7f) != 0x00) ||
691             ((gl520_read_value(client, GL520_REG_CONF) & 0x80) != 0x00)) {
692                 dev_dbg(&client->dev, "Unknown chip type, skipping\n");
693                 return -ENODEV;
694         }
695
696         strlcpy(info->type, "gl520sm", I2C_NAME_SIZE);
697
698         return 0;
699 }
700
701 static int gl520_probe(struct i2c_client *client,
702                        const struct i2c_device_id *id)
703 {
704         struct gl520_data *data;
705         int err;
706
707         data = kzalloc(sizeof(struct gl520_data), GFP_KERNEL);
708         if (!data) {
709                 err = -ENOMEM;
710                 goto exit;
711         }
712
713         i2c_set_clientdata(client, data);
714         mutex_init(&data->update_lock);
715
716         /* Initialize the GL520SM chip */
717         gl520_init_client(client);
718
719         /* Register sysfs hooks */
720         if ((err = sysfs_create_group(&client->dev.kobj, &gl520_group)))
721                 goto exit_free;
722
723         if (data->two_temps) {
724                 if ((err = device_create_file(&client->dev,
725                                 &sensor_dev_attr_temp2_input.dev_attr))
726                  || (err = device_create_file(&client->dev,
727                                 &sensor_dev_attr_temp2_max.dev_attr))
728                  || (err = device_create_file(&client->dev,
729                                 &sensor_dev_attr_temp2_max_hyst.dev_attr))
730                  || (err = device_create_file(&client->dev,
731                                 &sensor_dev_attr_temp2_alarm.dev_attr))
732                  || (err = device_create_file(&client->dev,
733                                 &sensor_dev_attr_temp2_beep.dev_attr)))
734                         goto exit_remove_files;
735         } else {
736                 if ((err = device_create_file(&client->dev,
737                                 &sensor_dev_attr_in4_input.dev_attr))
738                  || (err = device_create_file(&client->dev,
739                                 &sensor_dev_attr_in4_min.dev_attr))
740                  || (err = device_create_file(&client->dev,
741                                 &sensor_dev_attr_in4_max.dev_attr))
742                  || (err = device_create_file(&client->dev,
743                                 &sensor_dev_attr_in4_alarm.dev_attr))
744                  || (err = device_create_file(&client->dev,
745                                 &sensor_dev_attr_in4_beep.dev_attr)))
746                         goto exit_remove_files;
747         }
748
749
750         data->hwmon_dev = hwmon_device_register(&client->dev);
751         if (IS_ERR(data->hwmon_dev)) {
752                 err = PTR_ERR(data->hwmon_dev);
753                 goto exit_remove_files;
754         }
755
756         return 0;
757
758 exit_remove_files:
759         sysfs_remove_group(&client->dev.kobj, &gl520_group);
760         sysfs_remove_group(&client->dev.kobj, &gl520_group_opt);
761 exit_free:
762         kfree(data);
763 exit:
764         return err;
765 }
766
767
768 /* Called when we have found a new GL520SM. */
769 static void gl520_init_client(struct i2c_client *client)
770 {
771         struct gl520_data *data = i2c_get_clientdata(client);
772         u8 oldconf, conf;
773
774         conf = oldconf = gl520_read_value(client, GL520_REG_CONF);
775
776         data->alarm_mask = 0xff;
777         data->vrm = vid_which_vrm();
778
779         if (extra_sensor_type == 1)
780                 conf &= ~0x10;
781         else if (extra_sensor_type == 2)
782                 conf |= 0x10;
783         data->two_temps = !(conf & 0x10);
784
785         /* If IRQ# is disabled, we can safely force comparator mode */
786         if (!(conf & 0x20))
787                 conf &= 0xf7;
788
789         /* Enable monitoring if needed */
790         conf |= 0x40;
791
792         if (conf != oldconf)
793                 gl520_write_value(client, GL520_REG_CONF, conf);
794
795         gl520_update_device(&(client->dev));
796
797         if (data->fan_min[0] == 0)
798                 data->alarm_mask &= ~0x20;
799         if (data->fan_min[1] == 0)
800                 data->alarm_mask &= ~0x40;
801
802         data->beep_mask &= data->alarm_mask;
803         gl520_write_value(client, GL520_REG_BEEP_MASK, data->beep_mask);
804 }
805
806 static int gl520_remove(struct i2c_client *client)
807 {
808         struct gl520_data *data = i2c_get_clientdata(client);
809
810         hwmon_device_unregister(data->hwmon_dev);
811         sysfs_remove_group(&client->dev.kobj, &gl520_group);
812         sysfs_remove_group(&client->dev.kobj, &gl520_group_opt);
813
814         kfree(data);
815         return 0;
816 }
817
818
819 /* Registers 0x07 to 0x0c are word-sized, others are byte-sized
820    GL520 uses a high-byte first convention */
821 static int gl520_read_value(struct i2c_client *client, u8 reg)
822 {
823         if ((reg >= 0x07) && (reg <= 0x0c))
824                 return swab16(i2c_smbus_read_word_data(client, reg));
825         else
826                 return i2c_smbus_read_byte_data(client, reg);
827 }
828
829 static int gl520_write_value(struct i2c_client *client, u8 reg, u16 value)
830 {
831         if ((reg >= 0x07) && (reg <= 0x0c))
832                 return i2c_smbus_write_word_data(client, reg, swab16(value));
833         else
834                 return i2c_smbus_write_byte_data(client, reg, value);
835 }
836
837
838 static struct gl520_data *gl520_update_device(struct device *dev)
839 {
840         struct i2c_client *client = to_i2c_client(dev);
841         struct gl520_data *data = i2c_get_clientdata(client);
842         int val, i;
843
844         mutex_lock(&data->update_lock);
845
846         if (time_after(jiffies, data->last_updated + 2 * HZ) || !data->valid) {
847
848                 dev_dbg(&client->dev, "Starting gl520sm update\n");
849
850                 data->alarms = gl520_read_value(client, GL520_REG_ALARMS);
851                 data->beep_mask = gl520_read_value(client, GL520_REG_BEEP_MASK);
852                 data->vid = gl520_read_value(client, GL520_REG_VID_INPUT) & 0x1f;
853
854                 for (i = 0; i < 4; i++) {
855                         data->in_input[i] = gl520_read_value(client,
856                                                         GL520_REG_IN_INPUT[i]);
857                         val = gl520_read_value(client, GL520_REG_IN_LIMIT[i]);
858                         data->in_min[i] = val & 0xff;
859                         data->in_max[i] = (val >> 8) & 0xff;
860                 }
861
862                 val = gl520_read_value(client, GL520_REG_FAN_INPUT);
863                 data->fan_input[0] = (val >> 8) & 0xff;
864                 data->fan_input[1] = val & 0xff;
865
866                 val = gl520_read_value(client, GL520_REG_FAN_MIN);
867                 data->fan_min[0] = (val >> 8) & 0xff;
868                 data->fan_min[1] = val & 0xff;
869
870                 data->temp_input[0] = gl520_read_value(client,
871                                                 GL520_REG_TEMP_INPUT[0]);
872                 data->temp_max[0] = gl520_read_value(client,
873                                                 GL520_REG_TEMP_MAX[0]);
874                 data->temp_max_hyst[0] = gl520_read_value(client,
875                                                 GL520_REG_TEMP_MAX_HYST[0]);
876
877                 val = gl520_read_value(client, GL520_REG_FAN_DIV);
878                 data->fan_div[0] = (val >> 6) & 0x03;
879                 data->fan_div[1] = (val >> 4) & 0x03;
880                 data->fan_off = (val >> 2) & 0x01;
881
882                 data->alarms &= data->alarm_mask;
883
884                 val = gl520_read_value(client, GL520_REG_CONF);
885                 data->beep_enable = !((val >> 2) & 1);
886
887                 /* Temp1 and Vin4 are the same input */
888                 if (data->two_temps) {
889                         data->temp_input[1] = gl520_read_value(client,
890                                                 GL520_REG_TEMP_INPUT[1]);
891                         data->temp_max[1] = gl520_read_value(client,
892                                                 GL520_REG_TEMP_MAX[1]);
893                         data->temp_max_hyst[1] = gl520_read_value(client,
894                                                 GL520_REG_TEMP_MAX_HYST[1]);
895                 } else {
896                         data->in_input[4] = gl520_read_value(client,
897                                                 GL520_REG_IN_INPUT[4]);
898                         data->in_min[4] = gl520_read_value(client,
899                                                 GL520_REG_IN_MIN[4]);
900                         data->in_max[4] = gl520_read_value(client,
901                                                 GL520_REG_IN_MAX[4]);
902                 }
903
904                 data->last_updated = jiffies;
905                 data->valid = 1;
906         }
907
908         mutex_unlock(&data->update_lock);
909
910         return data;
911 }
912
913
914 static int __init sensors_gl520sm_init(void)
915 {
916         return i2c_add_driver(&gl520_driver);
917 }
918
919 static void __exit sensors_gl520sm_exit(void)
920 {
921         i2c_del_driver(&gl520_driver);
922 }
923
924
925 MODULE_AUTHOR("Frodo Looijaard <frodol@dds.nl>, "
926         "Kyösti Mälkki <kmalkki@cc.hut.fi>, "
927         "Maarten Deprez <maartendeprez@users.sourceforge.net>");
928 MODULE_DESCRIPTION("GL520SM driver");
929 MODULE_LICENSE("GPL");
930
931 module_init(sensors_gl520sm_init);
932 module_exit(sensors_gl520sm_exit);