60d34bc578cbaf98f98d6649cde8a57526f9e5bc
[linux-2.6.git] / drivers / hwmon / lm87.c
1 /*
2  * lm87.c
3  *
4  * Copyright (C) 2000       Frodo Looijaard <frodol@dds.nl>
5  *                          Philip Edelbrock <phil@netroedge.com>
6  *                          Stephen Rousset <stephen.rousset@rocketlogix.com>
7  *                          Dan Eaton <dan.eaton@rocketlogix.com>
8  * Copyright (C) 2004-2008  Jean Delvare <khali@linux-fr.org>
9  *
10  * Original port to Linux 2.6 by Jeff Oliver.
11  *
12  * The LM87 is a sensor chip made by National Semiconductor. It monitors up
13  * to 8 voltages (including its own power source), up to three temperatures
14  * (its own plus up to two external ones) and up to two fans. The default
15  * configuration is 6 voltages, two temperatures and two fans (see below).
16  * Voltages are scaled internally with ratios such that the nominal value of
17  * each voltage correspond to a register value of 192 (which means a
18  * resolution of about 0.5% of the nominal value). Temperature values are
19  * reported with a 1 deg resolution and a 3-4 deg accuracy. Complete
20  * datasheet can be obtained from National's website at:
21  *   http://www.national.com/pf/LM/LM87.html
22  *
23  * Some functions share pins, so not all functions are available at the same
24  * time. Which are depends on the hardware setup. This driver normally
25  * assumes that firmware configured the chip correctly. Where this is not
26  * the case, platform code must set the I2C client's platform_data to point
27  * to a u8 value to be written to the channel register.
28  * For reference, here is the list of exclusive functions:
29  *  - in0+in5 (default) or temp3
30  *  - fan1 (default) or in6
31  *  - fan2 (default) or in7
32  *  - VID lines (default) or IRQ lines (not handled by this driver)
33  *
34  * The LM87 additionally features an analog output, supposedly usable to
35  * control the speed of a fan. All new chips use pulse width modulation
36  * instead. The LM87 is the only hardware monitoring chipset I know of
37  * which uses amplitude modulation. Be careful when using this feature.
38  *
39  * This driver also supports the ADM1024, a sensor chip made by Analog
40  * Devices. That chip is fully compatible with the LM87. Complete
41  * datasheet can be obtained from Analog's website at:
42  *   http://www.analog.com/en/prod/0,2877,ADM1024,00.html
43  *
44  * This program is free software; you can redistribute it and/or modify
45  * it under the terms of the GNU General Public License as published by
46  * the Free Software Foundation; either version 2 of the License, or
47  * (at your option) any later version.
48  *
49  * This program is distributed in the hope that it will be useful,
50  * but WITHOUT ANY WARRANTY; without even the implied warranty of
51  * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
52  * GNU General Public License for more details.
53  *
54  * You should have received a copy of the GNU General Public License
55  * along with this program; if not, write to the Free Software
56  * Foundation, Inc., 675 Mass Ave, Cambridge, MA 02139, USA.
57  */
58
59 #include <linux/module.h>
60 #include <linux/init.h>
61 #include <linux/slab.h>
62 #include <linux/jiffies.h>
63 #include <linux/i2c.h>
64 #include <linux/hwmon.h>
65 #include <linux/hwmon-sysfs.h>
66 #include <linux/hwmon-vid.h>
67 #include <linux/err.h>
68 #include <linux/mutex.h>
69
70 /*
71  * Addresses to scan
72  * LM87 has three possible addresses: 0x2c, 0x2d and 0x2e.
73  */
74
75 static const unsigned short normal_i2c[] = { 0x2c, 0x2d, 0x2e, I2C_CLIENT_END };
76
77 /*
78  * Insmod parameters
79  */
80
81 I2C_CLIENT_INSMOD_2(lm87, adm1024);
82
83 /*
84  * The LM87 registers
85  */
86
87 /* nr in 0..5 */
88 #define LM87_REG_IN(nr)                 (0x20 + (nr))
89 #define LM87_REG_IN_MAX(nr)             (0x2B + (nr) * 2)
90 #define LM87_REG_IN_MIN(nr)             (0x2C + (nr) * 2)
91 /* nr in 0..1 */
92 #define LM87_REG_AIN(nr)                (0x28 + (nr))
93 #define LM87_REG_AIN_MIN(nr)            (0x1A + (nr))
94 #define LM87_REG_AIN_MAX(nr)            (0x3B + (nr))
95
96 static u8 LM87_REG_TEMP[3] = { 0x27, 0x26, 0x20 };
97 static u8 LM87_REG_TEMP_HIGH[3] = { 0x39, 0x37, 0x2B };
98 static u8 LM87_REG_TEMP_LOW[3] = { 0x3A, 0x38, 0x2C };
99
100 #define LM87_REG_TEMP_HW_INT_LOCK       0x13
101 #define LM87_REG_TEMP_HW_EXT_LOCK       0x14
102 #define LM87_REG_TEMP_HW_INT            0x17
103 #define LM87_REG_TEMP_HW_EXT            0x18
104
105 /* nr in 0..1 */
106 #define LM87_REG_FAN(nr)                (0x28 + (nr))
107 #define LM87_REG_FAN_MIN(nr)            (0x3B + (nr))
108 #define LM87_REG_AOUT                   0x19
109
110 #define LM87_REG_CONFIG                 0x40
111 #define LM87_REG_CHANNEL_MODE           0x16
112 #define LM87_REG_VID_FAN_DIV            0x47
113 #define LM87_REG_VID4                   0x49
114
115 #define LM87_REG_ALARMS1                0x41
116 #define LM87_REG_ALARMS2                0x42
117
118 #define LM87_REG_COMPANY_ID             0x3E
119 #define LM87_REG_REVISION               0x3F
120
121 /*
122  * Conversions and various macros
123  * The LM87 uses signed 8-bit values for temperatures.
124  */
125
126 #define IN_FROM_REG(reg,scale)  (((reg) * (scale) + 96) / 192)
127 #define IN_TO_REG(val,scale)    ((val) <= 0 ? 0 : \
128                                  (val) * 192 >= (scale) * 255 ? 255 : \
129                                  ((val) * 192 + (scale)/2) / (scale))
130
131 #define TEMP_FROM_REG(reg)      ((reg) * 1000)
132 #define TEMP_TO_REG(val)        ((val) <= -127500 ? -128 : \
133                                  (val) >= 126500 ? 127 : \
134                                  (((val) < 0 ? (val)-500 : (val)+500) / 1000))
135
136 #define FAN_FROM_REG(reg,div)   ((reg) == 255 || (reg) == 0 ? 0 : \
137                                  (1350000 + (reg)*(div) / 2) / ((reg)*(div)))
138 #define FAN_TO_REG(val,div)     ((val)*(div) * 255 <= 1350000 ? 255 : \
139                                  (1350000 + (val)*(div) / 2) / ((val)*(div)))
140
141 #define FAN_DIV_FROM_REG(reg)   (1 << (reg))
142
143 /* analog out is 9.80mV/LSB */
144 #define AOUT_FROM_REG(reg)      (((reg) * 98 + 5) / 10)
145 #define AOUT_TO_REG(val)        ((val) <= 0 ? 0 : \
146                                  (val) >= 2500 ? 255 : \
147                                  ((val) * 10 + 49) / 98)
148
149 /* nr in 0..1 */
150 #define CHAN_NO_FAN(nr)         (1 << (nr))
151 #define CHAN_TEMP3              (1 << 2)
152 #define CHAN_VCC_5V             (1 << 3)
153 #define CHAN_NO_VID             (1 << 7)
154
155 /*
156  * Functions declaration
157  */
158
159 static int lm87_probe(struct i2c_client *client,
160                       const struct i2c_device_id *id);
161 static int lm87_detect(struct i2c_client *new_client,
162                        struct i2c_board_info *info);
163 static void lm87_init_client(struct i2c_client *client);
164 static int lm87_remove(struct i2c_client *client);
165 static struct lm87_data *lm87_update_device(struct device *dev);
166
167 /*
168  * Driver data (common to all clients)
169  */
170
171 static const struct i2c_device_id lm87_id[] = {
172         { "lm87", lm87 },
173         { "adm1024", adm1024 },
174         { }
175 };
176 MODULE_DEVICE_TABLE(i2c, lm87_id);
177
178 static struct i2c_driver lm87_driver = {
179         .class          = I2C_CLASS_HWMON,
180         .driver = {
181                 .name   = "lm87",
182         },
183         .probe          = lm87_probe,
184         .remove         = lm87_remove,
185         .id_table       = lm87_id,
186         .detect         = lm87_detect,
187         .address_list   = normal_i2c,
188 };
189
190 /*
191  * Client data (each client gets its own)
192  */
193
194 struct lm87_data {
195         struct device *hwmon_dev;
196         struct mutex update_lock;
197         char valid; /* zero until following fields are valid */
198         unsigned long last_updated; /* In jiffies */
199
200         u8 channel;             /* register value */
201         u8 config;              /* original register value */
202
203         u8 in[8];               /* register value */
204         u8 in_max[8];           /* register value */
205         u8 in_min[8];           /* register value */
206         u16 in_scale[8];
207
208         s8 temp[3];             /* register value */
209         s8 temp_high[3];        /* register value */
210         s8 temp_low[3];         /* register value */
211         s8 temp_crit_int;       /* min of two register values */
212         s8 temp_crit_ext;       /* min of two register values */
213
214         u8 fan[2];              /* register value */
215         u8 fan_min[2];          /* register value */
216         u8 fan_div[2];          /* register value, shifted right */
217         u8 aout;                /* register value */
218
219         u16 alarms;             /* register values, combined */
220         u8 vid;                 /* register values, combined */
221         u8 vrm;
222 };
223
224 /*
225  * Sysfs stuff
226  */
227
228 static inline int lm87_read_value(struct i2c_client *client, u8 reg)
229 {
230         return i2c_smbus_read_byte_data(client, reg);
231 }
232
233 static inline int lm87_write_value(struct i2c_client *client, u8 reg, u8 value)
234 {
235         return i2c_smbus_write_byte_data(client, reg, value);
236 }
237
238 #define show_in(offset) \
239 static ssize_t show_in##offset##_input(struct device *dev, struct device_attribute *attr, char *buf) \
240 { \
241         struct lm87_data *data = lm87_update_device(dev); \
242         return sprintf(buf, "%u\n", IN_FROM_REG(data->in[offset], \
243                        data->in_scale[offset])); \
244 } \
245 static ssize_t show_in##offset##_min(struct device *dev, struct device_attribute *attr, char *buf) \
246 { \
247         struct lm87_data *data = lm87_update_device(dev); \
248         return sprintf(buf, "%u\n", IN_FROM_REG(data->in_min[offset], \
249                        data->in_scale[offset])); \
250 } \
251 static ssize_t show_in##offset##_max(struct device *dev, struct device_attribute *attr, char *buf) \
252 { \
253         struct lm87_data *data = lm87_update_device(dev); \
254         return sprintf(buf, "%u\n", IN_FROM_REG(data->in_max[offset], \
255                        data->in_scale[offset])); \
256 } \
257 static DEVICE_ATTR(in##offset##_input, S_IRUGO, \
258                 show_in##offset##_input, NULL);
259 show_in(0);
260 show_in(1);
261 show_in(2);
262 show_in(3);
263 show_in(4);
264 show_in(5);
265 show_in(6);
266 show_in(7);
267
268 static void set_in_min(struct device *dev, const char *buf, int nr)
269 {
270         struct i2c_client *client = to_i2c_client(dev);
271         struct lm87_data *data = i2c_get_clientdata(client);
272         long val = simple_strtol(buf, NULL, 10);
273
274         mutex_lock(&data->update_lock);
275         data->in_min[nr] = IN_TO_REG(val, data->in_scale[nr]);
276         lm87_write_value(client, nr<6 ? LM87_REG_IN_MIN(nr) :
277                          LM87_REG_AIN_MIN(nr-6), data->in_min[nr]);
278         mutex_unlock(&data->update_lock);
279 }
280
281 static void set_in_max(struct device *dev, const char *buf, int nr)
282 {
283         struct i2c_client *client = to_i2c_client(dev);
284         struct lm87_data *data = i2c_get_clientdata(client);
285         long val = simple_strtol(buf, NULL, 10);
286
287         mutex_lock(&data->update_lock);
288         data->in_max[nr] = IN_TO_REG(val, data->in_scale[nr]);
289         lm87_write_value(client, nr<6 ? LM87_REG_IN_MAX(nr) :
290                          LM87_REG_AIN_MAX(nr-6), data->in_max[nr]);
291         mutex_unlock(&data->update_lock);
292 }
293
294 #define set_in(offset) \
295 static ssize_t set_in##offset##_min(struct device *dev, struct device_attribute *attr, \
296                 const char *buf, size_t count) \
297 { \
298         set_in_min(dev, buf, offset); \
299         return count; \
300 } \
301 static ssize_t set_in##offset##_max(struct device *dev, struct device_attribute *attr, \
302                 const char *buf, size_t count) \
303 { \
304         set_in_max(dev, buf, offset); \
305         return count; \
306 } \
307 static DEVICE_ATTR(in##offset##_min, S_IRUGO | S_IWUSR, \
308                 show_in##offset##_min, set_in##offset##_min); \
309 static DEVICE_ATTR(in##offset##_max, S_IRUGO | S_IWUSR, \
310                 show_in##offset##_max, set_in##offset##_max);
311 set_in(0);
312 set_in(1);
313 set_in(2);
314 set_in(3);
315 set_in(4);
316 set_in(5);
317 set_in(6);
318 set_in(7);
319
320 #define show_temp(offset) \
321 static ssize_t show_temp##offset##_input(struct device *dev, struct device_attribute *attr, char *buf) \
322 { \
323         struct lm87_data *data = lm87_update_device(dev); \
324         return sprintf(buf, "%d\n", TEMP_FROM_REG(data->temp[offset-1])); \
325 } \
326 static ssize_t show_temp##offset##_low(struct device *dev, struct device_attribute *attr, char *buf) \
327 { \
328         struct lm87_data *data = lm87_update_device(dev); \
329         return sprintf(buf, "%d\n", TEMP_FROM_REG(data->temp_low[offset-1])); \
330 } \
331 static ssize_t show_temp##offset##_high(struct device *dev, struct device_attribute *attr, char *buf) \
332 { \
333         struct lm87_data *data = lm87_update_device(dev); \
334         return sprintf(buf, "%d\n", TEMP_FROM_REG(data->temp_high[offset-1])); \
335 }\
336 static DEVICE_ATTR(temp##offset##_input, S_IRUGO, \
337                 show_temp##offset##_input, NULL);
338 show_temp(1);
339 show_temp(2);
340 show_temp(3);
341
342 static void set_temp_low(struct device *dev, const char *buf, int nr)
343 {
344         struct i2c_client *client = to_i2c_client(dev);
345         struct lm87_data *data = i2c_get_clientdata(client);
346         long val = simple_strtol(buf, NULL, 10);
347
348         mutex_lock(&data->update_lock);
349         data->temp_low[nr] = TEMP_TO_REG(val);
350         lm87_write_value(client, LM87_REG_TEMP_LOW[nr], data->temp_low[nr]);
351         mutex_unlock(&data->update_lock);
352 }
353
354 static void set_temp_high(struct device *dev, const char *buf, int nr)
355 {
356         struct i2c_client *client = to_i2c_client(dev);
357         struct lm87_data *data = i2c_get_clientdata(client);
358         long val = simple_strtol(buf, NULL, 10);
359
360         mutex_lock(&data->update_lock);
361         data->temp_high[nr] = TEMP_TO_REG(val);
362         lm87_write_value(client, LM87_REG_TEMP_HIGH[nr], data->temp_high[nr]);
363         mutex_unlock(&data->update_lock);
364 }
365
366 #define set_temp(offset) \
367 static ssize_t set_temp##offset##_low(struct device *dev, struct device_attribute *attr, \
368                 const char *buf, size_t count) \
369 { \
370         set_temp_low(dev, buf, offset-1); \
371         return count; \
372 } \
373 static ssize_t set_temp##offset##_high(struct device *dev, struct device_attribute *attr, \
374                 const char *buf, size_t count) \
375 { \
376         set_temp_high(dev, buf, offset-1); \
377         return count; \
378 } \
379 static DEVICE_ATTR(temp##offset##_max, S_IRUGO | S_IWUSR, \
380                 show_temp##offset##_high, set_temp##offset##_high); \
381 static DEVICE_ATTR(temp##offset##_min, S_IRUGO | S_IWUSR, \
382                 show_temp##offset##_low, set_temp##offset##_low);
383 set_temp(1);
384 set_temp(2);
385 set_temp(3);
386
387 static ssize_t show_temp_crit_int(struct device *dev, struct device_attribute *attr, char *buf)
388 {
389         struct lm87_data *data = lm87_update_device(dev);
390         return sprintf(buf, "%d\n", TEMP_FROM_REG(data->temp_crit_int));
391 }
392
393 static ssize_t show_temp_crit_ext(struct device *dev, struct device_attribute *attr, char *buf)
394 {
395         struct lm87_data *data = lm87_update_device(dev);
396         return sprintf(buf, "%d\n", TEMP_FROM_REG(data->temp_crit_ext));
397 }
398
399 static DEVICE_ATTR(temp1_crit, S_IRUGO, show_temp_crit_int, NULL);
400 static DEVICE_ATTR(temp2_crit, S_IRUGO, show_temp_crit_ext, NULL);
401 static DEVICE_ATTR(temp3_crit, S_IRUGO, show_temp_crit_ext, NULL);
402
403 #define show_fan(offset) \
404 static ssize_t show_fan##offset##_input(struct device *dev, struct device_attribute *attr, char *buf) \
405 { \
406         struct lm87_data *data = lm87_update_device(dev); \
407         return sprintf(buf, "%d\n", FAN_FROM_REG(data->fan[offset-1], \
408                        FAN_DIV_FROM_REG(data->fan_div[offset-1]))); \
409 } \
410 static ssize_t show_fan##offset##_min(struct device *dev, struct device_attribute *attr, char *buf) \
411 { \
412         struct lm87_data *data = lm87_update_device(dev); \
413         return sprintf(buf, "%d\n", FAN_FROM_REG(data->fan_min[offset-1], \
414                        FAN_DIV_FROM_REG(data->fan_div[offset-1]))); \
415 } \
416 static ssize_t show_fan##offset##_div(struct device *dev, struct device_attribute *attr, char *buf) \
417 { \
418         struct lm87_data *data = lm87_update_device(dev); \
419         return sprintf(buf, "%d\n", FAN_DIV_FROM_REG(data->fan_div[offset-1])); \
420 } \
421 static DEVICE_ATTR(fan##offset##_input, S_IRUGO, \
422                 show_fan##offset##_input, NULL);
423 show_fan(1);
424 show_fan(2);
425
426 static void set_fan_min(struct device *dev, const char *buf, int nr)
427 {
428         struct i2c_client *client = to_i2c_client(dev);
429         struct lm87_data *data = i2c_get_clientdata(client);
430         long val = simple_strtol(buf, NULL, 10);
431
432         mutex_lock(&data->update_lock);
433         data->fan_min[nr] = FAN_TO_REG(val,
434                             FAN_DIV_FROM_REG(data->fan_div[nr]));
435         lm87_write_value(client, LM87_REG_FAN_MIN(nr), data->fan_min[nr]);
436         mutex_unlock(&data->update_lock);
437 }
438
439 /* Note: we save and restore the fan minimum here, because its value is
440    determined in part by the fan clock divider.  This follows the principle
441    of least surprise; the user doesn't expect the fan minimum to change just
442    because the divider changed. */
443 static ssize_t set_fan_div(struct device *dev, const char *buf,
444                 size_t count, int nr)
445 {
446         struct i2c_client *client = to_i2c_client(dev);
447         struct lm87_data *data = i2c_get_clientdata(client);
448         long val = simple_strtol(buf, NULL, 10);
449         unsigned long min;
450         u8 reg;
451
452         mutex_lock(&data->update_lock);
453         min = FAN_FROM_REG(data->fan_min[nr],
454                            FAN_DIV_FROM_REG(data->fan_div[nr]));
455
456         switch (val) {
457         case 1: data->fan_div[nr] = 0; break;
458         case 2: data->fan_div[nr] = 1; break;
459         case 4: data->fan_div[nr] = 2; break;
460         case 8: data->fan_div[nr] = 3; break;
461         default:
462                 mutex_unlock(&data->update_lock);
463                 return -EINVAL;
464         }
465
466         reg = lm87_read_value(client, LM87_REG_VID_FAN_DIV);
467         switch (nr) {
468         case 0:
469             reg = (reg & 0xCF) | (data->fan_div[0] << 4);
470             break;
471         case 1:
472             reg = (reg & 0x3F) | (data->fan_div[1] << 6);
473             break;
474         }
475         lm87_write_value(client, LM87_REG_VID_FAN_DIV, reg);
476
477         data->fan_min[nr] = FAN_TO_REG(min, val);
478         lm87_write_value(client, LM87_REG_FAN_MIN(nr),
479                          data->fan_min[nr]);
480         mutex_unlock(&data->update_lock);
481
482         return count;
483 }
484
485 #define set_fan(offset) \
486 static ssize_t set_fan##offset##_min(struct device *dev, struct device_attribute *attr, const char *buf, \
487                 size_t count) \
488 { \
489         set_fan_min(dev, buf, offset-1); \
490         return count; \
491 } \
492 static ssize_t set_fan##offset##_div(struct device *dev, struct device_attribute *attr, const char *buf, \
493                 size_t count) \
494 { \
495         return set_fan_div(dev, buf, count, offset-1); \
496 } \
497 static DEVICE_ATTR(fan##offset##_min, S_IRUGO | S_IWUSR, \
498                 show_fan##offset##_min, set_fan##offset##_min); \
499 static DEVICE_ATTR(fan##offset##_div, S_IRUGO | S_IWUSR, \
500                 show_fan##offset##_div, set_fan##offset##_div);
501 set_fan(1);
502 set_fan(2);
503
504 static ssize_t show_alarms(struct device *dev, struct device_attribute *attr, char *buf)
505 {
506         struct lm87_data *data = lm87_update_device(dev);
507         return sprintf(buf, "%d\n", data->alarms);
508 }
509 static DEVICE_ATTR(alarms, S_IRUGO, show_alarms, NULL);
510
511 static ssize_t show_vid(struct device *dev, struct device_attribute *attr, char *buf)
512 {
513         struct lm87_data *data = lm87_update_device(dev);
514         return sprintf(buf, "%d\n", vid_from_reg(data->vid, data->vrm));
515 }
516 static DEVICE_ATTR(cpu0_vid, S_IRUGO, show_vid, NULL);
517
518 static ssize_t show_vrm(struct device *dev, struct device_attribute *attr, char *buf)
519 {
520         struct lm87_data *data = dev_get_drvdata(dev);
521         return sprintf(buf, "%d\n", data->vrm);
522 }
523 static ssize_t set_vrm(struct device *dev, struct device_attribute *attr, const char *buf, size_t count)
524 {
525         struct lm87_data *data = dev_get_drvdata(dev);
526         data->vrm = simple_strtoul(buf, NULL, 10);
527         return count;
528 }
529 static DEVICE_ATTR(vrm, S_IRUGO | S_IWUSR, show_vrm, set_vrm);
530
531 static ssize_t show_aout(struct device *dev, struct device_attribute *attr, char *buf)
532 {
533         struct lm87_data *data = lm87_update_device(dev);
534         return sprintf(buf, "%d\n", AOUT_FROM_REG(data->aout));
535 }
536 static ssize_t set_aout(struct device *dev, struct device_attribute *attr, const char *buf, size_t count)
537 {
538         struct i2c_client *client = to_i2c_client(dev);
539         struct lm87_data *data = i2c_get_clientdata(client);
540         long val = simple_strtol(buf, NULL, 10);
541
542         mutex_lock(&data->update_lock);
543         data->aout = AOUT_TO_REG(val);
544         lm87_write_value(client, LM87_REG_AOUT, data->aout);
545         mutex_unlock(&data->update_lock);
546         return count;
547 }
548 static DEVICE_ATTR(aout_output, S_IRUGO | S_IWUSR, show_aout, set_aout);
549
550 static ssize_t show_alarm(struct device *dev, struct device_attribute *attr,
551                           char *buf)
552 {
553         struct lm87_data *data = lm87_update_device(dev);
554         int bitnr = to_sensor_dev_attr(attr)->index;
555         return sprintf(buf, "%u\n", (data->alarms >> bitnr) & 1);
556 }
557 static SENSOR_DEVICE_ATTR(in0_alarm, S_IRUGO, show_alarm, NULL, 0);
558 static SENSOR_DEVICE_ATTR(in1_alarm, S_IRUGO, show_alarm, NULL, 1);
559 static SENSOR_DEVICE_ATTR(in2_alarm, S_IRUGO, show_alarm, NULL, 2);
560 static SENSOR_DEVICE_ATTR(in3_alarm, S_IRUGO, show_alarm, NULL, 3);
561 static SENSOR_DEVICE_ATTR(in4_alarm, S_IRUGO, show_alarm, NULL, 8);
562 static SENSOR_DEVICE_ATTR(in5_alarm, S_IRUGO, show_alarm, NULL, 9);
563 static SENSOR_DEVICE_ATTR(in6_alarm, S_IRUGO, show_alarm, NULL, 6);
564 static SENSOR_DEVICE_ATTR(in7_alarm, S_IRUGO, show_alarm, NULL, 7);
565 static SENSOR_DEVICE_ATTR(temp1_alarm, S_IRUGO, show_alarm, NULL, 4);
566 static SENSOR_DEVICE_ATTR(temp2_alarm, S_IRUGO, show_alarm, NULL, 5);
567 static SENSOR_DEVICE_ATTR(temp3_alarm, S_IRUGO, show_alarm, NULL, 5);
568 static SENSOR_DEVICE_ATTR(fan1_alarm, S_IRUGO, show_alarm, NULL, 6);
569 static SENSOR_DEVICE_ATTR(fan2_alarm, S_IRUGO, show_alarm, NULL, 7);
570 static SENSOR_DEVICE_ATTR(temp2_fault, S_IRUGO, show_alarm, NULL, 14);
571 static SENSOR_DEVICE_ATTR(temp3_fault, S_IRUGO, show_alarm, NULL, 15);
572
573 /*
574  * Real code
575  */
576
577 static struct attribute *lm87_attributes[] = {
578         &dev_attr_in1_input.attr,
579         &dev_attr_in1_min.attr,
580         &dev_attr_in1_max.attr,
581         &sensor_dev_attr_in1_alarm.dev_attr.attr,
582         &dev_attr_in2_input.attr,
583         &dev_attr_in2_min.attr,
584         &dev_attr_in2_max.attr,
585         &sensor_dev_attr_in2_alarm.dev_attr.attr,
586         &dev_attr_in3_input.attr,
587         &dev_attr_in3_min.attr,
588         &dev_attr_in3_max.attr,
589         &sensor_dev_attr_in3_alarm.dev_attr.attr,
590         &dev_attr_in4_input.attr,
591         &dev_attr_in4_min.attr,
592         &dev_attr_in4_max.attr,
593         &sensor_dev_attr_in4_alarm.dev_attr.attr,
594
595         &dev_attr_temp1_input.attr,
596         &dev_attr_temp1_max.attr,
597         &dev_attr_temp1_min.attr,
598         &dev_attr_temp1_crit.attr,
599         &sensor_dev_attr_temp1_alarm.dev_attr.attr,
600         &dev_attr_temp2_input.attr,
601         &dev_attr_temp2_max.attr,
602         &dev_attr_temp2_min.attr,
603         &dev_attr_temp2_crit.attr,
604         &sensor_dev_attr_temp2_alarm.dev_attr.attr,
605         &sensor_dev_attr_temp2_fault.dev_attr.attr,
606
607         &dev_attr_alarms.attr,
608         &dev_attr_aout_output.attr,
609
610         NULL
611 };
612
613 static const struct attribute_group lm87_group = {
614         .attrs = lm87_attributes,
615 };
616
617 static struct attribute *lm87_attributes_opt[] = {
618         &dev_attr_in6_input.attr,
619         &dev_attr_in6_min.attr,
620         &dev_attr_in6_max.attr,
621         &sensor_dev_attr_in6_alarm.dev_attr.attr,
622
623         &dev_attr_fan1_input.attr,
624         &dev_attr_fan1_min.attr,
625         &dev_attr_fan1_div.attr,
626         &sensor_dev_attr_fan1_alarm.dev_attr.attr,
627
628         &dev_attr_in7_input.attr,
629         &dev_attr_in7_min.attr,
630         &dev_attr_in7_max.attr,
631         &sensor_dev_attr_in7_alarm.dev_attr.attr,
632
633         &dev_attr_fan2_input.attr,
634         &dev_attr_fan2_min.attr,
635         &dev_attr_fan2_div.attr,
636         &sensor_dev_attr_fan2_alarm.dev_attr.attr,
637
638         &dev_attr_temp3_input.attr,
639         &dev_attr_temp3_max.attr,
640         &dev_attr_temp3_min.attr,
641         &dev_attr_temp3_crit.attr,
642         &sensor_dev_attr_temp3_alarm.dev_attr.attr,
643         &sensor_dev_attr_temp3_fault.dev_attr.attr,
644
645         &dev_attr_in0_input.attr,
646         &dev_attr_in0_min.attr,
647         &dev_attr_in0_max.attr,
648         &sensor_dev_attr_in0_alarm.dev_attr.attr,
649         &dev_attr_in5_input.attr,
650         &dev_attr_in5_min.attr,
651         &dev_attr_in5_max.attr,
652         &sensor_dev_attr_in5_alarm.dev_attr.attr,
653
654         &dev_attr_cpu0_vid.attr,
655         &dev_attr_vrm.attr,
656
657         NULL
658 };
659
660 static const struct attribute_group lm87_group_opt = {
661         .attrs = lm87_attributes_opt,
662 };
663
664 /* Return 0 if detection is successful, -ENODEV otherwise */
665 static int lm87_detect(struct i2c_client *new_client,
666                        struct i2c_board_info *info)
667 {
668         struct i2c_adapter *adapter = new_client->adapter;
669         const char *name;
670         u8 cid, rev;
671
672         if (!i2c_check_functionality(adapter, I2C_FUNC_SMBUS_BYTE_DATA))
673                 return -ENODEV;
674
675         if (lm87_read_value(new_client, LM87_REG_CONFIG) & 0x80)
676                 return -ENODEV;
677
678         /* Now, we do the remaining detection. */
679         cid = lm87_read_value(new_client, LM87_REG_COMPANY_ID);
680         rev = lm87_read_value(new_client, LM87_REG_REVISION);
681
682         if (cid == 0x02                 /* National Semiconductor */
683          && (rev >= 0x01 && rev <= 0x08))
684                 name = "lm87";
685         else if (cid == 0x41            /* Analog Devices */
686               && (rev & 0xf0) == 0x10)
687                 name = "adm1024";
688         else {
689                 dev_dbg(&adapter->dev, "LM87 detection failed at 0x%02x\n",
690                         new_client->addr);
691                 return -ENODEV;
692         }
693
694         strlcpy(info->type, name, I2C_NAME_SIZE);
695
696         return 0;
697 }
698
699 static int lm87_probe(struct i2c_client *new_client,
700                       const struct i2c_device_id *id)
701 {
702         struct lm87_data *data;
703         int err;
704
705         data = kzalloc(sizeof(struct lm87_data), GFP_KERNEL);
706         if (!data) {
707                 err = -ENOMEM;
708                 goto exit;
709         }
710
711         i2c_set_clientdata(new_client, data);
712         data->valid = 0;
713         mutex_init(&data->update_lock);
714
715         /* Initialize the LM87 chip */
716         lm87_init_client(new_client);
717
718         data->in_scale[0] = 2500;
719         data->in_scale[1] = 2700;
720         data->in_scale[2] = (data->channel & CHAN_VCC_5V) ? 5000 : 3300;
721         data->in_scale[3] = 5000;
722         data->in_scale[4] = 12000;
723         data->in_scale[5] = 2700;
724         data->in_scale[6] = 1875;
725         data->in_scale[7] = 1875;
726
727         /* Register sysfs hooks */
728         if ((err = sysfs_create_group(&new_client->dev.kobj, &lm87_group)))
729                 goto exit_free;
730
731         if (data->channel & CHAN_NO_FAN(0)) {
732                 if ((err = device_create_file(&new_client->dev,
733                                         &dev_attr_in6_input))
734                  || (err = device_create_file(&new_client->dev,
735                                         &dev_attr_in6_min))
736                  || (err = device_create_file(&new_client->dev,
737                                         &dev_attr_in6_max))
738                  || (err = device_create_file(&new_client->dev,
739                                         &sensor_dev_attr_in6_alarm.dev_attr)))
740                         goto exit_remove;
741         } else {
742                 if ((err = device_create_file(&new_client->dev,
743                                         &dev_attr_fan1_input))
744                  || (err = device_create_file(&new_client->dev,
745                                         &dev_attr_fan1_min))
746                  || (err = device_create_file(&new_client->dev,
747                                         &dev_attr_fan1_div))
748                  || (err = device_create_file(&new_client->dev,
749                                         &sensor_dev_attr_fan1_alarm.dev_attr)))
750                         goto exit_remove;
751         }
752
753         if (data->channel & CHAN_NO_FAN(1)) {
754                 if ((err = device_create_file(&new_client->dev,
755                                         &dev_attr_in7_input))
756                  || (err = device_create_file(&new_client->dev,
757                                         &dev_attr_in7_min))
758                  || (err = device_create_file(&new_client->dev,
759                                         &dev_attr_in7_max))
760                  || (err = device_create_file(&new_client->dev,
761                                         &sensor_dev_attr_in7_alarm.dev_attr)))
762                         goto exit_remove;
763         } else {
764                 if ((err = device_create_file(&new_client->dev,
765                                         &dev_attr_fan2_input))
766                  || (err = device_create_file(&new_client->dev,
767                                         &dev_attr_fan2_min))
768                  || (err = device_create_file(&new_client->dev,
769                                         &dev_attr_fan2_div))
770                  || (err = device_create_file(&new_client->dev,
771                                         &sensor_dev_attr_fan2_alarm.dev_attr)))
772                         goto exit_remove;
773         }
774
775         if (data->channel & CHAN_TEMP3) {
776                 if ((err = device_create_file(&new_client->dev,
777                                         &dev_attr_temp3_input))
778                  || (err = device_create_file(&new_client->dev,
779                                         &dev_attr_temp3_max))
780                  || (err = device_create_file(&new_client->dev,
781                                         &dev_attr_temp3_min))
782                  || (err = device_create_file(&new_client->dev,
783                                         &dev_attr_temp3_crit))
784                  || (err = device_create_file(&new_client->dev,
785                                         &sensor_dev_attr_temp3_alarm.dev_attr))
786                  || (err = device_create_file(&new_client->dev,
787                                         &sensor_dev_attr_temp3_fault.dev_attr)))
788                         goto exit_remove;
789         } else {
790                 if ((err = device_create_file(&new_client->dev,
791                                         &dev_attr_in0_input))
792                  || (err = device_create_file(&new_client->dev,
793                                         &dev_attr_in0_min))
794                  || (err = device_create_file(&new_client->dev,
795                                         &dev_attr_in0_max))
796                  || (err = device_create_file(&new_client->dev,
797                                         &sensor_dev_attr_in0_alarm.dev_attr))
798                  || (err = device_create_file(&new_client->dev,
799                                         &dev_attr_in5_input))
800                  || (err = device_create_file(&new_client->dev,
801                                         &dev_attr_in5_min))
802                  || (err = device_create_file(&new_client->dev,
803                                         &dev_attr_in5_max))
804                  || (err = device_create_file(&new_client->dev,
805                                         &sensor_dev_attr_in5_alarm.dev_attr)))
806                         goto exit_remove;
807         }
808
809         if (!(data->channel & CHAN_NO_VID)) {
810                 data->vrm = vid_which_vrm();
811                 if ((err = device_create_file(&new_client->dev,
812                                         &dev_attr_cpu0_vid))
813                  || (err = device_create_file(&new_client->dev,
814                                         &dev_attr_vrm)))
815                         goto exit_remove;
816         }
817
818         data->hwmon_dev = hwmon_device_register(&new_client->dev);
819         if (IS_ERR(data->hwmon_dev)) {
820                 err = PTR_ERR(data->hwmon_dev);
821                 goto exit_remove;
822         }
823
824         return 0;
825
826 exit_remove:
827         sysfs_remove_group(&new_client->dev.kobj, &lm87_group);
828         sysfs_remove_group(&new_client->dev.kobj, &lm87_group_opt);
829 exit_free:
830         lm87_write_value(new_client, LM87_REG_CONFIG, data->config);
831         kfree(data);
832 exit:
833         return err;
834 }
835
836 static void lm87_init_client(struct i2c_client *client)
837 {
838         struct lm87_data *data = i2c_get_clientdata(client);
839
840         if (client->dev.platform_data) {
841                 data->channel = *(u8 *)client->dev.platform_data;
842                 lm87_write_value(client,
843                                  LM87_REG_CHANNEL_MODE, data->channel);
844         } else {
845                 data->channel = lm87_read_value(client, LM87_REG_CHANNEL_MODE);
846         }
847         data->config = lm87_read_value(client, LM87_REG_CONFIG) & 0x6F;
848
849         if (!(data->config & 0x01)) {
850                 int i;
851
852                 /* Limits are left uninitialized after power-up */
853                 for (i = 1; i < 6; i++) {
854                         lm87_write_value(client, LM87_REG_IN_MIN(i), 0x00);
855                         lm87_write_value(client, LM87_REG_IN_MAX(i), 0xFF);
856                 }
857                 for (i = 0; i < 2; i++) {
858                         lm87_write_value(client, LM87_REG_TEMP_HIGH[i], 0x7F);
859                         lm87_write_value(client, LM87_REG_TEMP_LOW[i], 0x00);
860                         lm87_write_value(client, LM87_REG_AIN_MIN(i), 0x00);
861                         lm87_write_value(client, LM87_REG_AIN_MAX(i), 0xFF);
862                 }
863                 if (data->channel & CHAN_TEMP3) {
864                         lm87_write_value(client, LM87_REG_TEMP_HIGH[2], 0x7F);
865                         lm87_write_value(client, LM87_REG_TEMP_LOW[2], 0x00);
866                 } else {
867                         lm87_write_value(client, LM87_REG_IN_MIN(0), 0x00);
868                         lm87_write_value(client, LM87_REG_IN_MAX(0), 0xFF);
869                 }
870         }
871
872         /* Make sure Start is set and INT#_Clear is clear */
873         if ((data->config & 0x09) != 0x01)
874                 lm87_write_value(client, LM87_REG_CONFIG,
875                                  (data->config & 0x77) | 0x01);
876 }
877
878 static int lm87_remove(struct i2c_client *client)
879 {
880         struct lm87_data *data = i2c_get_clientdata(client);
881
882         hwmon_device_unregister(data->hwmon_dev);
883         sysfs_remove_group(&client->dev.kobj, &lm87_group);
884         sysfs_remove_group(&client->dev.kobj, &lm87_group_opt);
885
886         lm87_write_value(client, LM87_REG_CONFIG, data->config);
887         kfree(data);
888         return 0;
889 }
890
891 static struct lm87_data *lm87_update_device(struct device *dev)
892 {
893         struct i2c_client *client = to_i2c_client(dev);
894         struct lm87_data *data = i2c_get_clientdata(client);
895
896         mutex_lock(&data->update_lock);
897
898         if (time_after(jiffies, data->last_updated + HZ) || !data->valid) {
899                 int i, j;
900
901                 dev_dbg(&client->dev, "Updating data.\n");
902
903                 i = (data->channel & CHAN_TEMP3) ? 1 : 0;
904                 j = (data->channel & CHAN_TEMP3) ? 5 : 6;
905                 for (; i < j; i++) {
906                         data->in[i] = lm87_read_value(client,
907                                       LM87_REG_IN(i));
908                         data->in_min[i] = lm87_read_value(client,
909                                           LM87_REG_IN_MIN(i));
910                         data->in_max[i] = lm87_read_value(client,
911                                           LM87_REG_IN_MAX(i));
912                 }
913
914                 for (i = 0; i < 2; i++) {
915                         if (data->channel & CHAN_NO_FAN(i)) {
916                                 data->in[6+i] = lm87_read_value(client,
917                                                 LM87_REG_AIN(i));
918                                 data->in_max[6+i] = lm87_read_value(client,
919                                                     LM87_REG_AIN_MAX(i));
920                                 data->in_min[6+i] = lm87_read_value(client,
921                                                     LM87_REG_AIN_MIN(i));
922
923                         } else {
924                                 data->fan[i] = lm87_read_value(client,
925                                                LM87_REG_FAN(i));
926                                 data->fan_min[i] = lm87_read_value(client,
927                                                    LM87_REG_FAN_MIN(i));
928                         }
929                 }
930
931                 j = (data->channel & CHAN_TEMP3) ? 3 : 2;
932                 for (i = 0 ; i < j; i++) {
933                         data->temp[i] = lm87_read_value(client,
934                                         LM87_REG_TEMP[i]);
935                         data->temp_high[i] = lm87_read_value(client,
936                                              LM87_REG_TEMP_HIGH[i]);
937                         data->temp_low[i] = lm87_read_value(client,
938                                             LM87_REG_TEMP_LOW[i]);
939                 }
940
941                 i = lm87_read_value(client, LM87_REG_TEMP_HW_INT_LOCK);
942                 j = lm87_read_value(client, LM87_REG_TEMP_HW_INT);
943                 data->temp_crit_int = min(i, j);
944
945                 i = lm87_read_value(client, LM87_REG_TEMP_HW_EXT_LOCK);
946                 j = lm87_read_value(client, LM87_REG_TEMP_HW_EXT);
947                 data->temp_crit_ext = min(i, j);
948
949                 i = lm87_read_value(client, LM87_REG_VID_FAN_DIV);
950                 data->fan_div[0] = (i >> 4) & 0x03;
951                 data->fan_div[1] = (i >> 6) & 0x03;
952                 data->vid = (i & 0x0F)
953                           | (lm87_read_value(client, LM87_REG_VID4) & 0x01)
954                              << 4;
955
956                 data->alarms = lm87_read_value(client, LM87_REG_ALARMS1)
957                              | (lm87_read_value(client, LM87_REG_ALARMS2)
958                                 << 8);
959                 data->aout = lm87_read_value(client, LM87_REG_AOUT);
960
961                 data->last_updated = jiffies;
962                 data->valid = 1;
963         }
964
965         mutex_unlock(&data->update_lock);
966
967         return data;
968 }
969
970 static int __init sensors_lm87_init(void)
971 {
972         return i2c_add_driver(&lm87_driver);
973 }
974
975 static void __exit sensors_lm87_exit(void)
976 {
977         i2c_del_driver(&lm87_driver);
978 }
979
980 MODULE_AUTHOR("Jean Delvare <khali@linux-fr.org> and others");
981 MODULE_DESCRIPTION("LM87 driver");
982 MODULE_LICENSE("GPL");
983
984 module_init(sensors_lm87_init);
985 module_exit(sensors_lm87_exit);