hwmon: normal_i2c arrays should be const
[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_attach_adapter(struct i2c_adapter *adapter);
83 static int gl520_detect(struct i2c_adapter *adapter, int address, int kind);
84 static void gl520_init_client(struct i2c_client *client);
85 static int gl520_detach_client(struct i2c_client *client);
86 static int gl520_read_value(struct i2c_client *client, u8 reg);
87 static int gl520_write_value(struct i2c_client *client, u8 reg, u16 value);
88 static struct gl520_data *gl520_update_device(struct device *dev);
89
90 /* Driver data */
91 static struct i2c_driver gl520_driver = {
92         .driver = {
93                 .name   = "gl520sm",
94         },
95         .attach_adapter = gl520_attach_adapter,
96         .detach_client  = gl520_detach_client,
97 };
98
99 /* Client data */
100 struct gl520_data {
101         struct i2c_client client;
102         struct device *hwmon_dev;
103         struct mutex update_lock;
104         char valid;             /* zero until the following fields are valid */
105         unsigned long last_updated;     /* in jiffies */
106
107         u8 vid;
108         u8 vrm;
109         u8 in_input[5];         /* [0] = VVD */
110         u8 in_min[5];           /* [0] = VDD */
111         u8 in_max[5];           /* [0] = VDD */
112         u8 fan_input[2];
113         u8 fan_min[2];
114         u8 fan_div[2];
115         u8 fan_off;
116         u8 temp_input[2];
117         u8 temp_max[2];
118         u8 temp_max_hyst[2];
119         u8 alarms;
120         u8 beep_enable;
121         u8 beep_mask;
122         u8 alarm_mask;
123         u8 two_temps;
124 };
125
126 /*
127  * Sysfs stuff
128  */
129
130 static ssize_t get_cpu_vid(struct device *dev, struct device_attribute *attr,
131                            char *buf)
132 {
133         struct gl520_data *data = gl520_update_device(dev);
134         return sprintf(buf, "%u\n", vid_from_reg(data->vid, data->vrm));
135 }
136 static DEVICE_ATTR(cpu0_vid, S_IRUGO, get_cpu_vid, NULL);
137
138 #define VDD_FROM_REG(val) (((val)*95+2)/4)
139 #define VDD_TO_REG(val) (SENSORS_LIMIT((((val)*4+47)/95),0,255))
140
141 #define IN_FROM_REG(val) ((val)*19)
142 #define IN_TO_REG(val) (SENSORS_LIMIT((((val)+9)/19),0,255))
143
144 static ssize_t get_in_input(struct device *dev, struct device_attribute *attr,
145                             char *buf)
146 {
147         int n = to_sensor_dev_attr(attr)->index;
148         struct gl520_data *data = gl520_update_device(dev);
149         u8 r = data->in_input[n];
150
151         if (n == 0)
152                 return sprintf(buf, "%d\n", VDD_FROM_REG(r));
153         else
154                 return sprintf(buf, "%d\n", IN_FROM_REG(r));
155 }
156
157 static ssize_t get_in_min(struct device *dev, struct device_attribute *attr,
158                           char *buf)
159 {
160         int n = to_sensor_dev_attr(attr)->index;
161         struct gl520_data *data = gl520_update_device(dev);
162         u8 r = data->in_min[n];
163
164         if (n == 0)
165                 return sprintf(buf, "%d\n", VDD_FROM_REG(r));
166         else
167                 return sprintf(buf, "%d\n", IN_FROM_REG(r));
168 }
169
170 static ssize_t get_in_max(struct device *dev, struct device_attribute *attr,
171                           char *buf)
172 {
173         int n = to_sensor_dev_attr(attr)->index;
174         struct gl520_data *data = gl520_update_device(dev);
175         u8 r = data->in_max[n];
176
177         if (n == 0)
178                 return sprintf(buf, "%d\n", VDD_FROM_REG(r));
179         else
180                 return sprintf(buf, "%d\n", IN_FROM_REG(r));
181 }
182
183 static ssize_t set_in_min(struct device *dev, struct device_attribute *attr,
184                           const char *buf, size_t count)
185 {
186         struct i2c_client *client = to_i2c_client(dev);
187         struct gl520_data *data = i2c_get_clientdata(client);
188         int n = to_sensor_dev_attr(attr)->index;
189         long v = simple_strtol(buf, NULL, 10);
190         u8 r;
191
192         mutex_lock(&data->update_lock);
193
194         if (n == 0)
195                 r = VDD_TO_REG(v);
196         else
197                 r = IN_TO_REG(v);
198
199         data->in_min[n] = r;
200
201         if (n < 4)
202                 gl520_write_value(client, GL520_REG_IN_MIN[n],
203                                   (gl520_read_value(client, GL520_REG_IN_MIN[n])
204                                    & ~0xff) | r);
205         else
206                 gl520_write_value(client, GL520_REG_IN_MIN[n], r);
207
208         mutex_unlock(&data->update_lock);
209         return count;
210 }
211
212 static ssize_t set_in_max(struct device *dev, struct device_attribute *attr,
213                           const char *buf, size_t count)
214 {
215         struct i2c_client *client = to_i2c_client(dev);
216         struct gl520_data *data = i2c_get_clientdata(client);
217         int n = to_sensor_dev_attr(attr)->index;
218         long v = simple_strtol(buf, NULL, 10);
219         u8 r;
220
221         if (n == 0)
222                 r = VDD_TO_REG(v);
223         else
224                 r = IN_TO_REG(v);
225
226         mutex_lock(&data->update_lock);
227
228         data->in_max[n] = r;
229
230         if (n < 4)
231                 gl520_write_value(client, GL520_REG_IN_MAX[n],
232                                   (gl520_read_value(client, GL520_REG_IN_MAX[n])
233                                    & ~0xff00) | (r << 8));
234         else
235                 gl520_write_value(client, GL520_REG_IN_MAX[n], r);
236
237         mutex_unlock(&data->update_lock);
238         return count;
239 }
240
241 static SENSOR_DEVICE_ATTR(in0_input, S_IRUGO, get_in_input, NULL, 0);
242 static SENSOR_DEVICE_ATTR(in1_input, S_IRUGO, get_in_input, NULL, 1);
243 static SENSOR_DEVICE_ATTR(in2_input, S_IRUGO, get_in_input, NULL, 2);
244 static SENSOR_DEVICE_ATTR(in3_input, S_IRUGO, get_in_input, NULL, 3);
245 static SENSOR_DEVICE_ATTR(in4_input, S_IRUGO, get_in_input, NULL, 4);
246 static SENSOR_DEVICE_ATTR(in0_min, S_IRUGO | S_IWUSR,
247                 get_in_min, set_in_min, 0);
248 static SENSOR_DEVICE_ATTR(in1_min, S_IRUGO | S_IWUSR,
249                 get_in_min, set_in_min, 1);
250 static SENSOR_DEVICE_ATTR(in2_min, S_IRUGO | S_IWUSR,
251                 get_in_min, set_in_min, 2);
252 static SENSOR_DEVICE_ATTR(in3_min, S_IRUGO | S_IWUSR,
253                 get_in_min, set_in_min, 3);
254 static SENSOR_DEVICE_ATTR(in4_min, S_IRUGO | S_IWUSR,
255                 get_in_min, set_in_min, 4);
256 static SENSOR_DEVICE_ATTR(in0_max, S_IRUGO | S_IWUSR,
257                 get_in_max, set_in_max, 0);
258 static SENSOR_DEVICE_ATTR(in1_max, S_IRUGO | S_IWUSR,
259                 get_in_max, set_in_max, 1);
260 static SENSOR_DEVICE_ATTR(in2_max, S_IRUGO | S_IWUSR,
261                 get_in_max, set_in_max, 2);
262 static SENSOR_DEVICE_ATTR(in3_max, S_IRUGO | S_IWUSR,
263                 get_in_max, set_in_max, 3);
264 static SENSOR_DEVICE_ATTR(in4_max, S_IRUGO | S_IWUSR,
265                 get_in_max, set_in_max, 4);
266
267 #define DIV_FROM_REG(val) (1 << (val))
268 #define FAN_FROM_REG(val,div) ((val)==0 ? 0 : (480000/((val) << (div))))
269 #define FAN_TO_REG(val,div) ((val)<=0?0:SENSORS_LIMIT((480000 + ((val) << ((div)-1))) / ((val) << (div)), 1, 255));
270
271 static ssize_t get_fan_input(struct device *dev, struct device_attribute *attr,
272                              char *buf)
273 {
274         int n = to_sensor_dev_attr(attr)->index;
275         struct gl520_data *data = gl520_update_device(dev);
276
277         return sprintf(buf, "%d\n", FAN_FROM_REG(data->fan_input[n],
278                                                  data->fan_div[n]));
279 }
280
281 static ssize_t get_fan_min(struct device *dev, struct device_attribute *attr,
282                            char *buf)
283 {
284         int n = to_sensor_dev_attr(attr)->index;
285         struct gl520_data *data = gl520_update_device(dev);
286
287         return sprintf(buf, "%d\n", FAN_FROM_REG(data->fan_min[n],
288                                                  data->fan_div[n]));
289 }
290
291 static ssize_t get_fan_div(struct device *dev, struct device_attribute *attr,
292                            char *buf)
293 {
294         int n = to_sensor_dev_attr(attr)->index;
295         struct gl520_data *data = gl520_update_device(dev);
296
297         return sprintf(buf, "%d\n", DIV_FROM_REG(data->fan_div[n]));
298 }
299
300 static ssize_t get_fan_off(struct device *dev, struct device_attribute *attr,
301                            char *buf)
302 {
303         struct gl520_data *data = gl520_update_device(dev);
304         return sprintf(buf, "%d\n", data->fan_off);
305 }
306
307 static ssize_t set_fan_min(struct device *dev, struct device_attribute *attr,
308                            const char *buf, size_t count)
309 {
310         struct i2c_client *client = to_i2c_client(dev);
311         struct gl520_data *data = i2c_get_clientdata(client);
312         int n = to_sensor_dev_attr(attr)->index;
313         unsigned long v = simple_strtoul(buf, NULL, 10);
314         u8 r;
315
316         mutex_lock(&data->update_lock);
317         r = FAN_TO_REG(v, data->fan_div[n]);
318         data->fan_min[n] = r;
319
320         if (n == 0)
321                 gl520_write_value(client, GL520_REG_FAN_MIN,
322                                   (gl520_read_value(client, GL520_REG_FAN_MIN)
323                                    & ~0xff00) | (r << 8));
324         else
325                 gl520_write_value(client, GL520_REG_FAN_MIN,
326                                   (gl520_read_value(client, GL520_REG_FAN_MIN)
327                                    & ~0xff) | r);
328
329         data->beep_mask = gl520_read_value(client, GL520_REG_BEEP_MASK);
330         if (data->fan_min[n] == 0)
331                 data->alarm_mask &= (n == 0) ? ~0x20 : ~0x40;
332         else
333                 data->alarm_mask |= (n == 0) ? 0x20 : 0x40;
334         data->beep_mask &= data->alarm_mask;
335         gl520_write_value(client, GL520_REG_BEEP_MASK, data->beep_mask);
336
337         mutex_unlock(&data->update_lock);
338         return count;
339 }
340
341 static ssize_t set_fan_div(struct device *dev, struct device_attribute *attr,
342                            const char *buf, size_t count)
343 {
344         struct i2c_client *client = to_i2c_client(dev);
345         struct gl520_data *data = i2c_get_clientdata(client);
346         int n = to_sensor_dev_attr(attr)->index;
347         unsigned long v = simple_strtoul(buf, NULL, 10);
348         u8 r;
349
350         switch (v) {
351         case 1: r = 0; break;
352         case 2: r = 1; break;
353         case 4: r = 2; break;
354         case 8: r = 3; break;
355         default:
356                 dev_err(&client->dev, "fan_div value %ld not supported. Choose one of 1, 2, 4 or 8!\n", v);
357                 return -EINVAL;
358         }
359
360         mutex_lock(&data->update_lock);
361         data->fan_div[n] = r;
362
363         if (n == 0)
364                 gl520_write_value(client, GL520_REG_FAN_DIV,
365                                   (gl520_read_value(client, GL520_REG_FAN_DIV)
366                                    & ~0xc0) | (r << 6));
367         else
368                 gl520_write_value(client, GL520_REG_FAN_DIV,
369                                   (gl520_read_value(client, GL520_REG_FAN_DIV)
370                                    & ~0x30) | (r << 4));
371
372         mutex_unlock(&data->update_lock);
373         return count;
374 }
375
376 static ssize_t set_fan_off(struct device *dev, struct device_attribute *attr,
377                            const char *buf, size_t count)
378 {
379         struct i2c_client *client = to_i2c_client(dev);
380         struct gl520_data *data = i2c_get_clientdata(client);
381         u8 r = simple_strtoul(buf, NULL, 10)?1:0;
382
383         mutex_lock(&data->update_lock);
384         data->fan_off = r;
385         gl520_write_value(client, GL520_REG_FAN_OFF,
386                           (gl520_read_value(client, GL520_REG_FAN_OFF)
387                            & ~0x0c) | (r << 2));
388         mutex_unlock(&data->update_lock);
389         return count;
390 }
391
392 static SENSOR_DEVICE_ATTR(fan1_input, S_IRUGO, get_fan_input, NULL, 0);
393 static SENSOR_DEVICE_ATTR(fan2_input, S_IRUGO, get_fan_input, NULL, 1);
394 static SENSOR_DEVICE_ATTR(fan1_min, S_IRUGO | S_IWUSR,
395                 get_fan_min, set_fan_min, 0);
396 static SENSOR_DEVICE_ATTR(fan2_min, S_IRUGO | S_IWUSR,
397                 get_fan_min, set_fan_min, 1);
398 static SENSOR_DEVICE_ATTR(fan1_div, S_IRUGO | S_IWUSR,
399                 get_fan_div, set_fan_div, 0);
400 static SENSOR_DEVICE_ATTR(fan2_div, S_IRUGO | S_IWUSR,
401                 get_fan_div, set_fan_div, 1);
402 static DEVICE_ATTR(fan1_off, S_IRUGO | S_IWUSR,
403                 get_fan_off, set_fan_off);
404
405 #define TEMP_FROM_REG(val) (((val) - 130) * 1000)
406 #define TEMP_TO_REG(val) (SENSORS_LIMIT(((((val)<0?(val)-500:(val)+500) / 1000)+130),0,255))
407
408 static ssize_t get_temp_input(struct device *dev, struct device_attribute *attr,
409                               char *buf)
410 {
411         int n = to_sensor_dev_attr(attr)->index;
412         struct gl520_data *data = gl520_update_device(dev);
413
414         return sprintf(buf, "%d\n", TEMP_FROM_REG(data->temp_input[n]));
415 }
416
417 static ssize_t get_temp_max(struct device *dev, struct device_attribute *attr,
418                             char *buf)
419 {
420         int n = to_sensor_dev_attr(attr)->index;
421         struct gl520_data *data = gl520_update_device(dev);
422
423         return sprintf(buf, "%d\n", TEMP_FROM_REG(data->temp_max[n]));
424 }
425
426 static ssize_t get_temp_max_hyst(struct device *dev, struct device_attribute
427                                  *attr, char *buf)
428 {
429         int n = to_sensor_dev_attr(attr)->index;
430         struct gl520_data *data = gl520_update_device(dev);
431
432         return sprintf(buf, "%d\n", TEMP_FROM_REG(data->temp_max_hyst[n]));
433 }
434
435 static ssize_t set_temp_max(struct device *dev, struct device_attribute *attr,
436                             const char *buf, size_t count)
437 {
438         struct i2c_client *client = to_i2c_client(dev);
439         struct gl520_data *data = i2c_get_clientdata(client);
440         int n = to_sensor_dev_attr(attr)->index;
441         long v = simple_strtol(buf, NULL, 10);
442
443         mutex_lock(&data->update_lock);
444         data->temp_max[n] = TEMP_TO_REG(v);
445         gl520_write_value(client, GL520_REG_TEMP_MAX[n], data->temp_max[n]);
446         mutex_unlock(&data->update_lock);
447         return count;
448 }
449
450 static ssize_t set_temp_max_hyst(struct device *dev, struct device_attribute
451                                  *attr, const char *buf, size_t count)
452 {
453         struct i2c_client *client = to_i2c_client(dev);
454         struct gl520_data *data = i2c_get_clientdata(client);
455         int n = to_sensor_dev_attr(attr)->index;
456         long v = simple_strtol(buf, NULL, 10);
457
458         mutex_lock(&data->update_lock);
459         data->temp_max_hyst[n] = TEMP_TO_REG(v);
460         gl520_write_value(client, GL520_REG_TEMP_MAX_HYST[n],
461                           data->temp_max_hyst[n]);
462         mutex_unlock(&data->update_lock);
463         return count;
464 }
465
466 static SENSOR_DEVICE_ATTR(temp1_input, S_IRUGO, get_temp_input, NULL, 0);
467 static SENSOR_DEVICE_ATTR(temp2_input, S_IRUGO, get_temp_input, NULL, 1);
468 static SENSOR_DEVICE_ATTR(temp1_max, S_IRUGO | S_IWUSR,
469                 get_temp_max, set_temp_max, 0);
470 static SENSOR_DEVICE_ATTR(temp2_max, S_IRUGO | S_IWUSR,
471                 get_temp_max, set_temp_max, 1);
472 static SENSOR_DEVICE_ATTR(temp1_max_hyst, S_IRUGO | S_IWUSR,
473                 get_temp_max_hyst, set_temp_max_hyst, 0);
474 static SENSOR_DEVICE_ATTR(temp2_max_hyst, S_IRUGO | S_IWUSR,
475                 get_temp_max_hyst, set_temp_max_hyst, 1);
476
477 static ssize_t get_alarms(struct device *dev, struct device_attribute *attr,
478                           char *buf)
479 {
480         struct gl520_data *data = gl520_update_device(dev);
481         return sprintf(buf, "%d\n", data->alarms);
482 }
483
484 static ssize_t get_beep_enable(struct device *dev, struct device_attribute
485                                *attr, char *buf)
486 {
487         struct gl520_data *data = gl520_update_device(dev);
488         return sprintf(buf, "%d\n", data->beep_enable);
489 }
490
491 static ssize_t get_beep_mask(struct device *dev, struct device_attribute *attr,
492                              char *buf)
493 {
494         struct gl520_data *data = gl520_update_device(dev);
495         return sprintf(buf, "%d\n", data->beep_mask);
496 }
497
498 static ssize_t set_beep_enable(struct device *dev, struct device_attribute
499                                *attr, const char *buf, size_t count)
500 {
501         struct i2c_client *client = to_i2c_client(dev);
502         struct gl520_data *data = i2c_get_clientdata(client);
503         u8 r = simple_strtoul(buf, NULL, 10)?0:1;
504
505         mutex_lock(&data->update_lock);
506         data->beep_enable = !r;
507         gl520_write_value(client, GL520_REG_BEEP_ENABLE,
508                           (gl520_read_value(client, GL520_REG_BEEP_ENABLE)
509                            & ~0x04) | (r << 2));
510         mutex_unlock(&data->update_lock);
511         return count;
512 }
513
514 static ssize_t set_beep_mask(struct device *dev, struct device_attribute *attr,
515                              const char *buf, size_t count)
516 {
517         struct i2c_client *client = to_i2c_client(dev);
518         struct gl520_data *data = i2c_get_clientdata(client);
519         u8 r = simple_strtoul(buf, NULL, 10);
520
521         mutex_lock(&data->update_lock);
522         r &= data->alarm_mask;
523         data->beep_mask = r;
524         gl520_write_value(client, GL520_REG_BEEP_MASK, r);
525         mutex_unlock(&data->update_lock);
526         return count;
527 }
528
529 static DEVICE_ATTR(alarms, S_IRUGO, get_alarms, NULL);
530 static DEVICE_ATTR(beep_enable, S_IRUGO | S_IWUSR,
531                 get_beep_enable, set_beep_enable);
532 static DEVICE_ATTR(beep_mask, S_IRUGO | S_IWUSR,
533                 get_beep_mask, set_beep_mask);
534
535 static ssize_t get_alarm(struct device *dev, struct device_attribute *attr,
536                          char *buf)
537 {
538         int bit_nr = to_sensor_dev_attr(attr)->index;
539         struct gl520_data *data = gl520_update_device(dev);
540
541         return sprintf(buf, "%d\n", (data->alarms >> bit_nr) & 1);
542 }
543
544 static SENSOR_DEVICE_ATTR(in0_alarm, S_IRUGO, get_alarm, NULL, 0);
545 static SENSOR_DEVICE_ATTR(in1_alarm, S_IRUGO, get_alarm, NULL, 1);
546 static SENSOR_DEVICE_ATTR(in2_alarm, S_IRUGO, get_alarm, NULL, 2);
547 static SENSOR_DEVICE_ATTR(in3_alarm, S_IRUGO, get_alarm, NULL, 3);
548 static SENSOR_DEVICE_ATTR(temp1_alarm, S_IRUGO, get_alarm, NULL, 4);
549 static SENSOR_DEVICE_ATTR(fan1_alarm, S_IRUGO, get_alarm, NULL, 5);
550 static SENSOR_DEVICE_ATTR(fan2_alarm, S_IRUGO, get_alarm, NULL, 6);
551 static SENSOR_DEVICE_ATTR(temp2_alarm, S_IRUGO, get_alarm, NULL, 7);
552 static SENSOR_DEVICE_ATTR(in4_alarm, S_IRUGO, get_alarm, NULL, 7);
553
554 static ssize_t get_beep(struct device *dev, struct device_attribute *attr,
555                         char *buf)
556 {
557         int bitnr = to_sensor_dev_attr(attr)->index;
558         struct gl520_data *data = gl520_update_device(dev);
559
560         return sprintf(buf, "%d\n", (data->beep_mask >> bitnr) & 1);
561 }
562
563 static ssize_t set_beep(struct device *dev, struct device_attribute *attr,
564                         const char *buf, size_t count)
565 {
566         struct i2c_client *client = to_i2c_client(dev);
567         struct gl520_data *data = i2c_get_clientdata(client);
568         int bitnr = to_sensor_dev_attr(attr)->index;
569         unsigned long bit;
570
571         bit = simple_strtoul(buf, NULL, 10);
572         if (bit & ~1)
573                 return -EINVAL;
574
575         mutex_lock(&data->update_lock);
576         data->beep_mask = gl520_read_value(client, GL520_REG_BEEP_MASK);
577         if (bit)
578                 data->beep_mask |= (1 << bitnr);
579         else
580                 data->beep_mask &= ~(1 << bitnr);
581         gl520_write_value(client, GL520_REG_BEEP_MASK, data->beep_mask);
582         mutex_unlock(&data->update_lock);
583         return count;
584 }
585
586 static SENSOR_DEVICE_ATTR(in0_beep, S_IRUGO | S_IWUSR, get_beep, set_beep, 0);
587 static SENSOR_DEVICE_ATTR(in1_beep, S_IRUGO | S_IWUSR, get_beep, set_beep, 1);
588 static SENSOR_DEVICE_ATTR(in2_beep, S_IRUGO | S_IWUSR, get_beep, set_beep, 2);
589 static SENSOR_DEVICE_ATTR(in3_beep, S_IRUGO | S_IWUSR, get_beep, set_beep, 3);
590 static SENSOR_DEVICE_ATTR(temp1_beep, S_IRUGO | S_IWUSR, get_beep, set_beep, 4);
591 static SENSOR_DEVICE_ATTR(fan1_beep, S_IRUGO | S_IWUSR, get_beep, set_beep, 5);
592 static SENSOR_DEVICE_ATTR(fan2_beep, S_IRUGO | S_IWUSR, get_beep, set_beep, 6);
593 static SENSOR_DEVICE_ATTR(temp2_beep, S_IRUGO | S_IWUSR, get_beep, set_beep, 7);
594 static SENSOR_DEVICE_ATTR(in4_beep, S_IRUGO | S_IWUSR, get_beep, set_beep, 7);
595
596 static struct attribute *gl520_attributes[] = {
597         &dev_attr_cpu0_vid.attr,
598
599         &sensor_dev_attr_in0_input.dev_attr.attr,
600         &sensor_dev_attr_in0_min.dev_attr.attr,
601         &sensor_dev_attr_in0_max.dev_attr.attr,
602         &sensor_dev_attr_in0_alarm.dev_attr.attr,
603         &sensor_dev_attr_in0_beep.dev_attr.attr,
604         &sensor_dev_attr_in1_input.dev_attr.attr,
605         &sensor_dev_attr_in1_min.dev_attr.attr,
606         &sensor_dev_attr_in1_max.dev_attr.attr,
607         &sensor_dev_attr_in1_alarm.dev_attr.attr,
608         &sensor_dev_attr_in1_beep.dev_attr.attr,
609         &sensor_dev_attr_in2_input.dev_attr.attr,
610         &sensor_dev_attr_in2_min.dev_attr.attr,
611         &sensor_dev_attr_in2_max.dev_attr.attr,
612         &sensor_dev_attr_in2_alarm.dev_attr.attr,
613         &sensor_dev_attr_in2_beep.dev_attr.attr,
614         &sensor_dev_attr_in3_input.dev_attr.attr,
615         &sensor_dev_attr_in3_min.dev_attr.attr,
616         &sensor_dev_attr_in3_max.dev_attr.attr,
617         &sensor_dev_attr_in3_alarm.dev_attr.attr,
618         &sensor_dev_attr_in3_beep.dev_attr.attr,
619
620         &sensor_dev_attr_fan1_input.dev_attr.attr,
621         &sensor_dev_attr_fan1_min.dev_attr.attr,
622         &sensor_dev_attr_fan1_div.dev_attr.attr,
623         &sensor_dev_attr_fan1_alarm.dev_attr.attr,
624         &sensor_dev_attr_fan1_beep.dev_attr.attr,
625         &dev_attr_fan1_off.attr,
626         &sensor_dev_attr_fan2_input.dev_attr.attr,
627         &sensor_dev_attr_fan2_min.dev_attr.attr,
628         &sensor_dev_attr_fan2_div.dev_attr.attr,
629         &sensor_dev_attr_fan2_alarm.dev_attr.attr,
630         &sensor_dev_attr_fan2_beep.dev_attr.attr,
631
632         &sensor_dev_attr_temp1_input.dev_attr.attr,
633         &sensor_dev_attr_temp1_max.dev_attr.attr,
634         &sensor_dev_attr_temp1_max_hyst.dev_attr.attr,
635         &sensor_dev_attr_temp1_alarm.dev_attr.attr,
636         &sensor_dev_attr_temp1_beep.dev_attr.attr,
637
638         &dev_attr_alarms.attr,
639         &dev_attr_beep_enable.attr,
640         &dev_attr_beep_mask.attr,
641         NULL
642 };
643
644 static const struct attribute_group gl520_group = {
645         .attrs = gl520_attributes,
646 };
647
648 static struct attribute *gl520_attributes_opt[] = {
649         &sensor_dev_attr_in4_input.dev_attr.attr,
650         &sensor_dev_attr_in4_min.dev_attr.attr,
651         &sensor_dev_attr_in4_max.dev_attr.attr,
652         &sensor_dev_attr_in4_alarm.dev_attr.attr,
653         &sensor_dev_attr_in4_beep.dev_attr.attr,
654
655         &sensor_dev_attr_temp2_input.dev_attr.attr,
656         &sensor_dev_attr_temp2_max.dev_attr.attr,
657         &sensor_dev_attr_temp2_max_hyst.dev_attr.attr,
658         &sensor_dev_attr_temp2_alarm.dev_attr.attr,
659         &sensor_dev_attr_temp2_beep.dev_attr.attr,
660         NULL
661 };
662
663 static const struct attribute_group gl520_group_opt = {
664         .attrs = gl520_attributes_opt,
665 };
666
667
668 /*
669  * Real code
670  */
671
672 static int gl520_attach_adapter(struct i2c_adapter *adapter)
673 {
674         if (!(adapter->class & I2C_CLASS_HWMON))
675                 return 0;
676         return i2c_probe(adapter, &addr_data, gl520_detect);
677 }
678
679 static int gl520_detect(struct i2c_adapter *adapter, int address, int kind)
680 {
681         struct i2c_client *client;
682         struct gl520_data *data;
683         int err = 0;
684
685         if (!i2c_check_functionality(adapter, I2C_FUNC_SMBUS_BYTE_DATA |
686                                      I2C_FUNC_SMBUS_WORD_DATA))
687                 goto exit;
688
689         /* OK. For now, we presume we have a valid client. We now create the
690            client structure, even though we cannot fill it completely yet.
691            But it allows us to access gl520_{read,write}_value. */
692
693         if (!(data = kzalloc(sizeof(struct gl520_data), GFP_KERNEL))) {
694                 err = -ENOMEM;
695                 goto exit;
696         }
697
698         client = &data->client;
699         i2c_set_clientdata(client, data);
700         client->addr = address;
701         client->adapter = adapter;
702         client->driver = &gl520_driver;
703
704         /* Determine the chip type. */
705         if (kind < 0) {
706                 if ((gl520_read_value(client, GL520_REG_CHIP_ID) != 0x20) ||
707                     ((gl520_read_value(client, GL520_REG_REVISION) & 0x7f) != 0x00) ||
708                     ((gl520_read_value(client, GL520_REG_CONF) & 0x80) != 0x00)) {
709                         dev_dbg(&client->dev, "Unknown chip type, skipping\n");
710                         goto exit_free;
711                 }
712         }
713
714         /* Fill in the remaining client fields */
715         strlcpy(client->name, "gl520sm", I2C_NAME_SIZE);
716         mutex_init(&data->update_lock);
717
718         /* Tell the I2C layer a new client has arrived */
719         if ((err = i2c_attach_client(client)))
720                 goto exit_free;
721
722         /* Initialize the GL520SM chip */
723         gl520_init_client(client);
724
725         /* Register sysfs hooks */
726         if ((err = sysfs_create_group(&client->dev.kobj, &gl520_group)))
727                 goto exit_detach;
728
729         if (data->two_temps) {
730                 if ((err = device_create_file(&client->dev,
731                                 &sensor_dev_attr_temp2_input.dev_attr))
732                  || (err = device_create_file(&client->dev,
733                                 &sensor_dev_attr_temp2_max.dev_attr))
734                  || (err = device_create_file(&client->dev,
735                                 &sensor_dev_attr_temp2_max_hyst.dev_attr))
736                  || (err = device_create_file(&client->dev,
737                                 &sensor_dev_attr_temp2_alarm.dev_attr))
738                  || (err = device_create_file(&client->dev,
739                                 &sensor_dev_attr_temp2_beep.dev_attr)))
740                         goto exit_remove_files;
741         } else {
742                 if ((err = device_create_file(&client->dev,
743                                 &sensor_dev_attr_in4_input.dev_attr))
744                  || (err = device_create_file(&client->dev,
745                                 &sensor_dev_attr_in4_min.dev_attr))
746                  || (err = device_create_file(&client->dev,
747                                 &sensor_dev_attr_in4_max.dev_attr))
748                  || (err = device_create_file(&client->dev,
749                                 &sensor_dev_attr_in4_alarm.dev_attr))
750                  || (err = device_create_file(&client->dev,
751                                 &sensor_dev_attr_in4_beep.dev_attr)))
752                         goto exit_remove_files;
753         }
754
755
756         data->hwmon_dev = hwmon_device_register(&client->dev);
757         if (IS_ERR(data->hwmon_dev)) {
758                 err = PTR_ERR(data->hwmon_dev);
759                 goto exit_remove_files;
760         }
761
762         return 0;
763
764 exit_remove_files:
765         sysfs_remove_group(&client->dev.kobj, &gl520_group);
766         sysfs_remove_group(&client->dev.kobj, &gl520_group_opt);
767 exit_detach:
768         i2c_detach_client(client);
769 exit_free:
770         kfree(data);
771 exit:
772         return err;
773 }
774
775
776 /* Called when we have found a new GL520SM. */
777 static void gl520_init_client(struct i2c_client *client)
778 {
779         struct gl520_data *data = i2c_get_clientdata(client);
780         u8 oldconf, conf;
781
782         conf = oldconf = gl520_read_value(client, GL520_REG_CONF);
783
784         data->alarm_mask = 0xff;
785         data->vrm = vid_which_vrm();
786
787         if (extra_sensor_type == 1)
788                 conf &= ~0x10;
789         else if (extra_sensor_type == 2)
790                 conf |= 0x10;
791         data->two_temps = !(conf & 0x10);
792
793         /* If IRQ# is disabled, we can safely force comparator mode */
794         if (!(conf & 0x20))
795                 conf &= 0xf7;
796
797         /* Enable monitoring if needed */
798         conf |= 0x40;
799
800         if (conf != oldconf)
801                 gl520_write_value(client, GL520_REG_CONF, conf);
802
803         gl520_update_device(&(client->dev));
804
805         if (data->fan_min[0] == 0)
806                 data->alarm_mask &= ~0x20;
807         if (data->fan_min[1] == 0)
808                 data->alarm_mask &= ~0x40;
809
810         data->beep_mask &= data->alarm_mask;
811         gl520_write_value(client, GL520_REG_BEEP_MASK, data->beep_mask);
812 }
813
814 static int gl520_detach_client(struct i2c_client *client)
815 {
816         struct gl520_data *data = i2c_get_clientdata(client);
817         int err;
818
819         hwmon_device_unregister(data->hwmon_dev);
820         sysfs_remove_group(&client->dev.kobj, &gl520_group);
821         sysfs_remove_group(&client->dev.kobj, &gl520_group_opt);
822
823         if ((err = i2c_detach_client(client)))
824                 return err;
825
826         kfree(data);
827         return 0;
828 }
829
830
831 /* Registers 0x07 to 0x0c are word-sized, others are byte-sized
832    GL520 uses a high-byte first convention */
833 static int gl520_read_value(struct i2c_client *client, u8 reg)
834 {
835         if ((reg >= 0x07) && (reg <= 0x0c))
836                 return swab16(i2c_smbus_read_word_data(client, reg));
837         else
838                 return i2c_smbus_read_byte_data(client, reg);
839 }
840
841 static int gl520_write_value(struct i2c_client *client, u8 reg, u16 value)
842 {
843         if ((reg >= 0x07) && (reg <= 0x0c))
844                 return i2c_smbus_write_word_data(client, reg, swab16(value));
845         else
846                 return i2c_smbus_write_byte_data(client, reg, value);
847 }
848
849
850 static struct gl520_data *gl520_update_device(struct device *dev)
851 {
852         struct i2c_client *client = to_i2c_client(dev);
853         struct gl520_data *data = i2c_get_clientdata(client);
854         int val, i;
855
856         mutex_lock(&data->update_lock);
857
858         if (time_after(jiffies, data->last_updated + 2 * HZ) || !data->valid) {
859
860                 dev_dbg(&client->dev, "Starting gl520sm update\n");
861
862                 data->alarms = gl520_read_value(client, GL520_REG_ALARMS);
863                 data->beep_mask = gl520_read_value(client, GL520_REG_BEEP_MASK);
864                 data->vid = gl520_read_value(client, GL520_REG_VID_INPUT) & 0x1f;
865
866                 for (i = 0; i < 4; i++) {
867                         data->in_input[i] = gl520_read_value(client,
868                                                         GL520_REG_IN_INPUT[i]);
869                         val = gl520_read_value(client, GL520_REG_IN_LIMIT[i]);
870                         data->in_min[i] = val & 0xff;
871                         data->in_max[i] = (val >> 8) & 0xff;
872                 }
873
874                 val = gl520_read_value(client, GL520_REG_FAN_INPUT);
875                 data->fan_input[0] = (val >> 8) & 0xff;
876                 data->fan_input[1] = val & 0xff;
877
878                 val = gl520_read_value(client, GL520_REG_FAN_MIN);
879                 data->fan_min[0] = (val >> 8) & 0xff;
880                 data->fan_min[1] = val & 0xff;
881
882                 data->temp_input[0] = gl520_read_value(client,
883                                                 GL520_REG_TEMP_INPUT[0]);
884                 data->temp_max[0] = gl520_read_value(client,
885                                                 GL520_REG_TEMP_MAX[0]);
886                 data->temp_max_hyst[0] = gl520_read_value(client,
887                                                 GL520_REG_TEMP_MAX_HYST[0]);
888
889                 val = gl520_read_value(client, GL520_REG_FAN_DIV);
890                 data->fan_div[0] = (val >> 6) & 0x03;
891                 data->fan_div[1] = (val >> 4) & 0x03;
892                 data->fan_off = (val >> 2) & 0x01;
893
894                 data->alarms &= data->alarm_mask;
895
896                 val = gl520_read_value(client, GL520_REG_CONF);
897                 data->beep_enable = !((val >> 2) & 1);
898
899                 /* Temp1 and Vin4 are the same input */
900                 if (data->two_temps) {
901                         data->temp_input[1] = gl520_read_value(client,
902                                                 GL520_REG_TEMP_INPUT[1]);
903                         data->temp_max[1] = gl520_read_value(client,
904                                                 GL520_REG_TEMP_MAX[1]);
905                         data->temp_max_hyst[1] = gl520_read_value(client,
906                                                 GL520_REG_TEMP_MAX_HYST[1]);
907                 } else {
908                         data->in_input[4] = gl520_read_value(client,
909                                                 GL520_REG_IN_INPUT[4]);
910                         data->in_min[4] = gl520_read_value(client,
911                                                 GL520_REG_IN_MIN[4]);
912                         data->in_max[4] = gl520_read_value(client,
913                                                 GL520_REG_IN_MAX[4]);
914                 }
915
916                 data->last_updated = jiffies;
917                 data->valid = 1;
918         }
919
920         mutex_unlock(&data->update_lock);
921
922         return data;
923 }
924
925
926 static int __init sensors_gl520sm_init(void)
927 {
928         return i2c_add_driver(&gl520_driver);
929 }
930
931 static void __exit sensors_gl520sm_exit(void)
932 {
933         i2c_del_driver(&gl520_driver);
934 }
935
936
937 MODULE_AUTHOR("Frodo Looijaard <frodol@dds.nl>, "
938         "Kyösti Mälkki <kmalkki@cc.hut.fi>, "
939         "Maarten Deprez <maartendeprez@users.sourceforge.net>");
940 MODULE_DESCRIPTION("GL520SM driver");
941 MODULE_LICENSE("GPL");
942
943 module_init(sensors_gl520sm_init);
944 module_exit(sensors_gl520sm_exit);