Merge branch 'sched-fixes-for-linus' of git://git.kernel.org/pub/scm/linux/kernel...
[linux-2.6] / 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) 2004,2007  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 assumes that
25  * the BIOS configured the chip correctly. In that respect, it  differs from
26  * the original driver (from lm_sensors for Linux 2.4), which would force the
27  * LM87 to an arbitrary, compile-time chosen mode, regardless of the actual
28  * chipset wiring.
29  * For reference, here is the list of exclusive functions:
30  *  - in0+in5 (default) or temp3
31  *  - fan1 (default) or in6
32  *  - fan2 (default) or in7
33  *  - VID lines (default) or IRQ lines (not handled by this driver)
34  *
35  * The LM87 additionally features an analog output, supposedly usable to
36  * control the speed of a fan. All new chips use pulse width modulation
37  * instead. The LM87 is the only hardware monitoring chipset I know of
38  * which uses amplitude modulation. Be careful when using this feature.
39  *
40  * This driver also supports the ADM1024, a sensor chip made by Analog
41  * Devices. That chip is fully compatible with the LM87. Complete
42  * datasheet can be obtained from Analog's website at:
43  *   http://www.analog.com/en/prod/0,2877,ADM1024,00.html
44  *
45  * This program is free software; you can redistribute it and/or modify
46  * it under the terms of the GNU General Public License as published by
47  * the Free Software Foundation; either version 2 of the License, or
48  * (at your option) any later version.
49  *
50  * This program is distributed in the hope that it will be useful,
51  * but WITHOUT ANY WARRANTY; without even the implied warranty of
52  * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
53  * GNU General Public License for more details.
54  *
55  * You should have received a copy of the GNU General Public License
56  * along with this program; if not, write to the Free Software
57  * Foundation, Inc., 675 Mass Ave, Cambridge, MA 02139, USA.
58  */
59
60 #include <linux/module.h>
61 #include <linux/init.h>
62 #include <linux/slab.h>
63 #include <linux/jiffies.h>
64 #include <linux/i2c.h>
65 #include <linux/hwmon.h>
66 #include <linux/hwmon-sysfs.h>
67 #include <linux/hwmon-vid.h>
68 #include <linux/err.h>
69 #include <linux/mutex.h>
70
71 /*
72  * Addresses to scan
73  * LM87 has three possible addresses: 0x2c, 0x2d and 0x2e.
74  */
75
76 static const unsigned short normal_i2c[] = { 0x2c, 0x2d, 0x2e, I2C_CLIENT_END };
77
78 /*
79  * Insmod parameters
80  */
81
82 I2C_CLIENT_INSMOD_2(lm87, adm1024);
83
84 /*
85  * The LM87 registers
86  */
87
88 /* nr in 0..5 */
89 #define LM87_REG_IN(nr)                 (0x20 + (nr))
90 #define LM87_REG_IN_MAX(nr)             (0x2B + (nr) * 2)
91 #define LM87_REG_IN_MIN(nr)             (0x2C + (nr) * 2)
92 /* nr in 0..1 */
93 #define LM87_REG_AIN(nr)                (0x28 + (nr))
94 #define LM87_REG_AIN_MIN(nr)            (0x1A + (nr))
95 #define LM87_REG_AIN_MAX(nr)            (0x3B + (nr))
96
97 static u8 LM87_REG_TEMP[3] = { 0x27, 0x26, 0x20 };
98 static u8 LM87_REG_TEMP_HIGH[3] = { 0x39, 0x37, 0x2B };
99 static u8 LM87_REG_TEMP_LOW[3] = { 0x3A, 0x38, 0x2C };
100
101 #define LM87_REG_TEMP_HW_INT_LOCK       0x13
102 #define LM87_REG_TEMP_HW_EXT_LOCK       0x14
103 #define LM87_REG_TEMP_HW_INT            0x17
104 #define LM87_REG_TEMP_HW_EXT            0x18
105
106 /* nr in 0..1 */
107 #define LM87_REG_FAN(nr)                (0x28 + (nr))
108 #define LM87_REG_FAN_MIN(nr)            (0x3B + (nr))
109 #define LM87_REG_AOUT                   0x19
110
111 #define LM87_REG_CONFIG                 0x40
112 #define LM87_REG_CHANNEL_MODE           0x16
113 #define LM87_REG_VID_FAN_DIV            0x47
114 #define LM87_REG_VID4                   0x49
115
116 #define LM87_REG_ALARMS1                0x41
117 #define LM87_REG_ALARMS2                0x42
118
119 #define LM87_REG_COMPANY_ID             0x3E
120 #define LM87_REG_REVISION               0x3F
121
122 /*
123  * Conversions and various macros
124  * The LM87 uses signed 8-bit values for temperatures.
125  */
126
127 #define IN_FROM_REG(reg,scale)  (((reg) * (scale) + 96) / 192)
128 #define IN_TO_REG(val,scale)    ((val) <= 0 ? 0 : \
129                                  (val) * 192 >= (scale) * 255 ? 255 : \
130                                  ((val) * 192 + (scale)/2) / (scale))
131
132 #define TEMP_FROM_REG(reg)      ((reg) * 1000)
133 #define TEMP_TO_REG(val)        ((val) <= -127500 ? -128 : \
134                                  (val) >= 126500 ? 127 : \
135                                  (((val) < 0 ? (val)-500 : (val)+500) / 1000))
136
137 #define FAN_FROM_REG(reg,div)   ((reg) == 255 || (reg) == 0 ? 0 : \
138                                  (1350000 + (reg)*(div) / 2) / ((reg)*(div)))
139 #define FAN_TO_REG(val,div)     ((val)*(div) * 255 <= 1350000 ? 255 : \
140                                  (1350000 + (val)*(div) / 2) / ((val)*(div)))
141
142 #define FAN_DIV_FROM_REG(reg)   (1 << (reg))
143
144 /* analog out is 9.80mV/LSB */
145 #define AOUT_FROM_REG(reg)      (((reg) * 98 + 5) / 10)
146 #define AOUT_TO_REG(val)        ((val) <= 0 ? 0 : \
147                                  (val) >= 2500 ? 255 : \
148                                  ((val) * 10 + 49) / 98)
149
150 /* nr in 0..1 */
151 #define CHAN_NO_FAN(nr)         (1 << (nr))
152 #define CHAN_TEMP3              (1 << 2)
153 #define CHAN_VCC_5V             (1 << 3)
154 #define CHAN_NO_VID             (1 << 7)
155
156 /*
157  * Functions declaration
158  */
159
160 static int lm87_attach_adapter(struct i2c_adapter *adapter);
161 static int lm87_detect(struct i2c_adapter *adapter, int address, int kind);
162 static void lm87_init_client(struct i2c_client *client);
163 static int lm87_detach_client(struct i2c_client *client);
164 static struct lm87_data *lm87_update_device(struct device *dev);
165
166 /*
167  * Driver data (common to all clients)
168  */
169
170 static struct i2c_driver lm87_driver = {
171         .driver = {
172                 .name   = "lm87",
173         },
174         .attach_adapter = lm87_attach_adapter,
175         .detach_client  = lm87_detach_client,
176 };
177
178 /*
179  * Client data (each client gets its own)
180  */
181
182 struct lm87_data {
183         struct i2c_client client;
184         struct device *hwmon_dev;
185         struct mutex update_lock;
186         char valid; /* zero until following fields are valid */
187         unsigned long last_updated; /* In jiffies */
188
189         u8 channel;             /* register value */
190
191         u8 in[8];               /* register value */
192         u8 in_max[8];           /* register value */
193         u8 in_min[8];           /* register value */
194         u16 in_scale[8];
195
196         s8 temp[3];             /* register value */
197         s8 temp_high[3];        /* register value */
198         s8 temp_low[3];         /* register value */
199         s8 temp_crit_int;       /* min of two register values */
200         s8 temp_crit_ext;       /* min of two register values */
201
202         u8 fan[2];              /* register value */
203         u8 fan_min[2];          /* register value */
204         u8 fan_div[2];          /* register value, shifted right */
205         u8 aout;                /* register value */
206
207         u16 alarms;             /* register values, combined */
208         u8 vid;                 /* register values, combined */
209         u8 vrm;
210 };
211
212 /*
213  * Sysfs stuff
214  */
215
216 static inline int lm87_read_value(struct i2c_client *client, u8 reg)
217 {
218         return i2c_smbus_read_byte_data(client, reg);
219 }
220
221 static inline int lm87_write_value(struct i2c_client *client, u8 reg, u8 value)
222 {
223         return i2c_smbus_write_byte_data(client, reg, value);
224 }
225
226 #define show_in(offset) \
227 static ssize_t show_in##offset##_input(struct device *dev, struct device_attribute *attr, char *buf) \
228 { \
229         struct lm87_data *data = lm87_update_device(dev); \
230         return sprintf(buf, "%u\n", IN_FROM_REG(data->in[offset], \
231                        data->in_scale[offset])); \
232 } \
233 static ssize_t show_in##offset##_min(struct device *dev, struct device_attribute *attr, char *buf) \
234 { \
235         struct lm87_data *data = lm87_update_device(dev); \
236         return sprintf(buf, "%u\n", IN_FROM_REG(data->in_min[offset], \
237                        data->in_scale[offset])); \
238 } \
239 static ssize_t show_in##offset##_max(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_max[offset], \
243                        data->in_scale[offset])); \
244 } \
245 static DEVICE_ATTR(in##offset##_input, S_IRUGO, \
246                 show_in##offset##_input, NULL);
247 show_in(0);
248 show_in(1);
249 show_in(2);
250 show_in(3);
251 show_in(4);
252 show_in(5);
253 show_in(6);
254 show_in(7);
255
256 static void set_in_min(struct device *dev, const char *buf, int nr)
257 {
258         struct i2c_client *client = to_i2c_client(dev);
259         struct lm87_data *data = i2c_get_clientdata(client);
260         long val = simple_strtol(buf, NULL, 10);
261
262         mutex_lock(&data->update_lock);
263         data->in_min[nr] = IN_TO_REG(val, data->in_scale[nr]);
264         lm87_write_value(client, nr<6 ? LM87_REG_IN_MIN(nr) :
265                          LM87_REG_AIN_MIN(nr-6), data->in_min[nr]);
266         mutex_unlock(&data->update_lock);
267 }
268
269 static void set_in_max(struct device *dev, const char *buf, int nr)
270 {
271         struct i2c_client *client = to_i2c_client(dev);
272         struct lm87_data *data = i2c_get_clientdata(client);
273         long val = simple_strtol(buf, NULL, 10);
274
275         mutex_lock(&data->update_lock);
276         data->in_max[nr] = IN_TO_REG(val, data->in_scale[nr]);
277         lm87_write_value(client, nr<6 ? LM87_REG_IN_MAX(nr) :
278                          LM87_REG_AIN_MAX(nr-6), data->in_max[nr]);
279         mutex_unlock(&data->update_lock);
280 }
281
282 #define set_in(offset) \
283 static ssize_t set_in##offset##_min(struct device *dev, struct device_attribute *attr, \
284                 const char *buf, size_t count) \
285 { \
286         set_in_min(dev, buf, offset); \
287         return count; \
288 } \
289 static ssize_t set_in##offset##_max(struct device *dev, struct device_attribute *attr, \
290                 const char *buf, size_t count) \
291 { \
292         set_in_max(dev, buf, offset); \
293         return count; \
294 } \
295 static DEVICE_ATTR(in##offset##_min, S_IRUGO | S_IWUSR, \
296                 show_in##offset##_min, set_in##offset##_min); \
297 static DEVICE_ATTR(in##offset##_max, S_IRUGO | S_IWUSR, \
298                 show_in##offset##_max, set_in##offset##_max);
299 set_in(0);
300 set_in(1);
301 set_in(2);
302 set_in(3);
303 set_in(4);
304 set_in(5);
305 set_in(6);
306 set_in(7);
307
308 #define show_temp(offset) \
309 static ssize_t show_temp##offset##_input(struct device *dev, struct device_attribute *attr, char *buf) \
310 { \
311         struct lm87_data *data = lm87_update_device(dev); \
312         return sprintf(buf, "%d\n", TEMP_FROM_REG(data->temp[offset-1])); \
313 } \
314 static ssize_t show_temp##offset##_low(struct device *dev, struct device_attribute *attr, char *buf) \
315 { \
316         struct lm87_data *data = lm87_update_device(dev); \
317         return sprintf(buf, "%d\n", TEMP_FROM_REG(data->temp_low[offset-1])); \
318 } \
319 static ssize_t show_temp##offset##_high(struct device *dev, struct device_attribute *attr, char *buf) \
320 { \
321         struct lm87_data *data = lm87_update_device(dev); \
322         return sprintf(buf, "%d\n", TEMP_FROM_REG(data->temp_high[offset-1])); \
323 }\
324 static DEVICE_ATTR(temp##offset##_input, S_IRUGO, \
325                 show_temp##offset##_input, NULL);
326 show_temp(1);
327 show_temp(2);
328 show_temp(3);
329
330 static void set_temp_low(struct device *dev, const char *buf, int nr)
331 {
332         struct i2c_client *client = to_i2c_client(dev);
333         struct lm87_data *data = i2c_get_clientdata(client);
334         long val = simple_strtol(buf, NULL, 10);
335
336         mutex_lock(&data->update_lock);
337         data->temp_low[nr] = TEMP_TO_REG(val);
338         lm87_write_value(client, LM87_REG_TEMP_LOW[nr], data->temp_low[nr]);
339         mutex_unlock(&data->update_lock);
340 }
341
342 static void set_temp_high(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_high[nr] = TEMP_TO_REG(val);
350         lm87_write_value(client, LM87_REG_TEMP_HIGH[nr], data->temp_high[nr]);
351         mutex_unlock(&data->update_lock);
352 }
353
354 #define set_temp(offset) \
355 static ssize_t set_temp##offset##_low(struct device *dev, struct device_attribute *attr, \
356                 const char *buf, size_t count) \
357 { \
358         set_temp_low(dev, buf, offset-1); \
359         return count; \
360 } \
361 static ssize_t set_temp##offset##_high(struct device *dev, struct device_attribute *attr, \
362                 const char *buf, size_t count) \
363 { \
364         set_temp_high(dev, buf, offset-1); \
365         return count; \
366 } \
367 static DEVICE_ATTR(temp##offset##_max, S_IRUGO | S_IWUSR, \
368                 show_temp##offset##_high, set_temp##offset##_high); \
369 static DEVICE_ATTR(temp##offset##_min, S_IRUGO | S_IWUSR, \
370                 show_temp##offset##_low, set_temp##offset##_low);
371 set_temp(1);
372 set_temp(2);
373 set_temp(3);
374
375 static ssize_t show_temp_crit_int(struct device *dev, struct device_attribute *attr, char *buf)
376 {
377         struct lm87_data *data = lm87_update_device(dev);
378         return sprintf(buf, "%d\n", TEMP_FROM_REG(data->temp_crit_int));
379 }
380
381 static ssize_t show_temp_crit_ext(struct device *dev, struct device_attribute *attr, char *buf)
382 {
383         struct lm87_data *data = lm87_update_device(dev);
384         return sprintf(buf, "%d\n", TEMP_FROM_REG(data->temp_crit_ext));
385 }
386
387 static DEVICE_ATTR(temp1_crit, S_IRUGO, show_temp_crit_int, NULL);
388 static DEVICE_ATTR(temp2_crit, S_IRUGO, show_temp_crit_ext, NULL);
389 static DEVICE_ATTR(temp3_crit, S_IRUGO, show_temp_crit_ext, NULL);
390
391 #define show_fan(offset) \
392 static ssize_t show_fan##offset##_input(struct device *dev, struct device_attribute *attr, char *buf) \
393 { \
394         struct lm87_data *data = lm87_update_device(dev); \
395         return sprintf(buf, "%d\n", FAN_FROM_REG(data->fan[offset-1], \
396                        FAN_DIV_FROM_REG(data->fan_div[offset-1]))); \
397 } \
398 static ssize_t show_fan##offset##_min(struct device *dev, struct device_attribute *attr, char *buf) \
399 { \
400         struct lm87_data *data = lm87_update_device(dev); \
401         return sprintf(buf, "%d\n", FAN_FROM_REG(data->fan_min[offset-1], \
402                        FAN_DIV_FROM_REG(data->fan_div[offset-1]))); \
403 } \
404 static ssize_t show_fan##offset##_div(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_DIV_FROM_REG(data->fan_div[offset-1])); \
408 } \
409 static DEVICE_ATTR(fan##offset##_input, S_IRUGO, \
410                 show_fan##offset##_input, NULL);
411 show_fan(1);
412 show_fan(2);
413
414 static void set_fan_min(struct device *dev, const char *buf, int nr)
415 {
416         struct i2c_client *client = to_i2c_client(dev);
417         struct lm87_data *data = i2c_get_clientdata(client);
418         long val = simple_strtol(buf, NULL, 10);
419
420         mutex_lock(&data->update_lock);
421         data->fan_min[nr] = FAN_TO_REG(val,
422                             FAN_DIV_FROM_REG(data->fan_div[nr]));
423         lm87_write_value(client, LM87_REG_FAN_MIN(nr), data->fan_min[nr]);
424         mutex_unlock(&data->update_lock);
425 }
426
427 /* Note: we save and restore the fan minimum here, because its value is
428    determined in part by the fan clock divider.  This follows the principle
429    of least surprise; the user doesn't expect the fan minimum to change just
430    because the divider changed. */
431 static ssize_t set_fan_div(struct device *dev, const char *buf,
432                 size_t count, int nr)
433 {
434         struct i2c_client *client = to_i2c_client(dev);
435         struct lm87_data *data = i2c_get_clientdata(client);
436         long val = simple_strtol(buf, NULL, 10);
437         unsigned long min;
438         u8 reg;
439
440         mutex_lock(&data->update_lock);
441         min = FAN_FROM_REG(data->fan_min[nr],
442                            FAN_DIV_FROM_REG(data->fan_div[nr]));
443
444         switch (val) {
445         case 1: data->fan_div[nr] = 0; break;
446         case 2: data->fan_div[nr] = 1; break;
447         case 4: data->fan_div[nr] = 2; break;
448         case 8: data->fan_div[nr] = 3; break;
449         default:
450                 mutex_unlock(&data->update_lock);
451                 return -EINVAL;
452         }
453
454         reg = lm87_read_value(client, LM87_REG_VID_FAN_DIV);
455         switch (nr) {
456         case 0:
457             reg = (reg & 0xCF) | (data->fan_div[0] << 4);
458             break;
459         case 1:
460             reg = (reg & 0x3F) | (data->fan_div[1] << 6);
461             break;
462         }
463         lm87_write_value(client, LM87_REG_VID_FAN_DIV, reg);
464
465         data->fan_min[nr] = FAN_TO_REG(min, val);
466         lm87_write_value(client, LM87_REG_FAN_MIN(nr),
467                          data->fan_min[nr]);
468         mutex_unlock(&data->update_lock);
469
470         return count;
471 }
472
473 #define set_fan(offset) \
474 static ssize_t set_fan##offset##_min(struct device *dev, struct device_attribute *attr, const char *buf, \
475                 size_t count) \
476 { \
477         set_fan_min(dev, buf, offset-1); \
478         return count; \
479 } \
480 static ssize_t set_fan##offset##_div(struct device *dev, struct device_attribute *attr, const char *buf, \
481                 size_t count) \
482 { \
483         return set_fan_div(dev, buf, count, offset-1); \
484 } \
485 static DEVICE_ATTR(fan##offset##_min, S_IRUGO | S_IWUSR, \
486                 show_fan##offset##_min, set_fan##offset##_min); \
487 static DEVICE_ATTR(fan##offset##_div, S_IRUGO | S_IWUSR, \
488                 show_fan##offset##_div, set_fan##offset##_div);
489 set_fan(1);
490 set_fan(2);
491
492 static ssize_t show_alarms(struct device *dev, struct device_attribute *attr, char *buf)
493 {
494         struct lm87_data *data = lm87_update_device(dev);
495         return sprintf(buf, "%d\n", data->alarms);
496 }
497 static DEVICE_ATTR(alarms, S_IRUGO, show_alarms, NULL);
498
499 static ssize_t show_vid(struct device *dev, struct device_attribute *attr, char *buf)
500 {
501         struct lm87_data *data = lm87_update_device(dev);
502         return sprintf(buf, "%d\n", vid_from_reg(data->vid, data->vrm));
503 }
504 static DEVICE_ATTR(cpu0_vid, S_IRUGO, show_vid, NULL);
505
506 static ssize_t show_vrm(struct device *dev, struct device_attribute *attr, char *buf)
507 {
508         struct lm87_data *data = dev_get_drvdata(dev);
509         return sprintf(buf, "%d\n", data->vrm);
510 }
511 static ssize_t set_vrm(struct device *dev, struct device_attribute *attr, const char *buf, size_t count)
512 {
513         struct lm87_data *data = dev_get_drvdata(dev);
514         data->vrm = simple_strtoul(buf, NULL, 10);
515         return count;
516 }
517 static DEVICE_ATTR(vrm, S_IRUGO | S_IWUSR, show_vrm, set_vrm);
518
519 static ssize_t show_aout(struct device *dev, struct device_attribute *attr, char *buf)
520 {
521         struct lm87_data *data = lm87_update_device(dev);
522         return sprintf(buf, "%d\n", AOUT_FROM_REG(data->aout));
523 }
524 static ssize_t set_aout(struct device *dev, struct device_attribute *attr, const char *buf, size_t count)
525 {
526         struct i2c_client *client = to_i2c_client(dev);
527         struct lm87_data *data = i2c_get_clientdata(client);
528         long val = simple_strtol(buf, NULL, 10);
529
530         mutex_lock(&data->update_lock);
531         data->aout = AOUT_TO_REG(val);
532         lm87_write_value(client, LM87_REG_AOUT, data->aout);
533         mutex_unlock(&data->update_lock);
534         return count;
535 }
536 static DEVICE_ATTR(aout_output, S_IRUGO | S_IWUSR, show_aout, set_aout);
537
538 static ssize_t show_alarm(struct device *dev, struct device_attribute *attr,
539                           char *buf)
540 {
541         struct lm87_data *data = lm87_update_device(dev);
542         int bitnr = to_sensor_dev_attr(attr)->index;
543         return sprintf(buf, "%u\n", (data->alarms >> bitnr) & 1);
544 }
545 static SENSOR_DEVICE_ATTR(in0_alarm, S_IRUGO, show_alarm, NULL, 0);
546 static SENSOR_DEVICE_ATTR(in1_alarm, S_IRUGO, show_alarm, NULL, 1);
547 static SENSOR_DEVICE_ATTR(in2_alarm, S_IRUGO, show_alarm, NULL, 2);
548 static SENSOR_DEVICE_ATTR(in3_alarm, S_IRUGO, show_alarm, NULL, 3);
549 static SENSOR_DEVICE_ATTR(in4_alarm, S_IRUGO, show_alarm, NULL, 8);
550 static SENSOR_DEVICE_ATTR(in5_alarm, S_IRUGO, show_alarm, NULL, 9);
551 static SENSOR_DEVICE_ATTR(in6_alarm, S_IRUGO, show_alarm, NULL, 6);
552 static SENSOR_DEVICE_ATTR(in7_alarm, S_IRUGO, show_alarm, NULL, 7);
553 static SENSOR_DEVICE_ATTR(temp1_alarm, S_IRUGO, show_alarm, NULL, 4);
554 static SENSOR_DEVICE_ATTR(temp2_alarm, S_IRUGO, show_alarm, NULL, 5);
555 static SENSOR_DEVICE_ATTR(temp3_alarm, S_IRUGO, show_alarm, NULL, 5);
556 static SENSOR_DEVICE_ATTR(fan1_alarm, S_IRUGO, show_alarm, NULL, 6);
557 static SENSOR_DEVICE_ATTR(fan2_alarm, S_IRUGO, show_alarm, NULL, 7);
558 static SENSOR_DEVICE_ATTR(temp2_fault, S_IRUGO, show_alarm, NULL, 14);
559 static SENSOR_DEVICE_ATTR(temp3_fault, S_IRUGO, show_alarm, NULL, 15);
560
561 /*
562  * Real code
563  */
564
565 static int lm87_attach_adapter(struct i2c_adapter *adapter)
566 {
567         if (!(adapter->class & I2C_CLASS_HWMON))
568                 return 0;
569         return i2c_probe(adapter, &addr_data, lm87_detect);
570 }
571
572 static struct attribute *lm87_attributes[] = {
573         &dev_attr_in1_input.attr,
574         &dev_attr_in1_min.attr,
575         &dev_attr_in1_max.attr,
576         &sensor_dev_attr_in1_alarm.dev_attr.attr,
577         &dev_attr_in2_input.attr,
578         &dev_attr_in2_min.attr,
579         &dev_attr_in2_max.attr,
580         &sensor_dev_attr_in2_alarm.dev_attr.attr,
581         &dev_attr_in3_input.attr,
582         &dev_attr_in3_min.attr,
583         &dev_attr_in3_max.attr,
584         &sensor_dev_attr_in3_alarm.dev_attr.attr,
585         &dev_attr_in4_input.attr,
586         &dev_attr_in4_min.attr,
587         &dev_attr_in4_max.attr,
588         &sensor_dev_attr_in4_alarm.dev_attr.attr,
589
590         &dev_attr_temp1_input.attr,
591         &dev_attr_temp1_max.attr,
592         &dev_attr_temp1_min.attr,
593         &dev_attr_temp1_crit.attr,
594         &sensor_dev_attr_temp1_alarm.dev_attr.attr,
595         &dev_attr_temp2_input.attr,
596         &dev_attr_temp2_max.attr,
597         &dev_attr_temp2_min.attr,
598         &dev_attr_temp2_crit.attr,
599         &sensor_dev_attr_temp2_alarm.dev_attr.attr,
600         &sensor_dev_attr_temp2_fault.dev_attr.attr,
601
602         &dev_attr_alarms.attr,
603         &dev_attr_aout_output.attr,
604
605         NULL
606 };
607
608 static const struct attribute_group lm87_group = {
609         .attrs = lm87_attributes,
610 };
611
612 static struct attribute *lm87_attributes_opt[] = {
613         &dev_attr_in6_input.attr,
614         &dev_attr_in6_min.attr,
615         &dev_attr_in6_max.attr,
616         &sensor_dev_attr_in6_alarm.dev_attr.attr,
617
618         &dev_attr_fan1_input.attr,
619         &dev_attr_fan1_min.attr,
620         &dev_attr_fan1_div.attr,
621         &sensor_dev_attr_fan1_alarm.dev_attr.attr,
622
623         &dev_attr_in7_input.attr,
624         &dev_attr_in7_min.attr,
625         &dev_attr_in7_max.attr,
626         &sensor_dev_attr_in7_alarm.dev_attr.attr,
627
628         &dev_attr_fan2_input.attr,
629         &dev_attr_fan2_min.attr,
630         &dev_attr_fan2_div.attr,
631         &sensor_dev_attr_fan2_alarm.dev_attr.attr,
632
633         &dev_attr_temp3_input.attr,
634         &dev_attr_temp3_max.attr,
635         &dev_attr_temp3_min.attr,
636         &dev_attr_temp3_crit.attr,
637         &sensor_dev_attr_temp3_alarm.dev_attr.attr,
638         &sensor_dev_attr_temp3_fault.dev_attr.attr,
639
640         &dev_attr_in0_input.attr,
641         &dev_attr_in0_min.attr,
642         &dev_attr_in0_max.attr,
643         &sensor_dev_attr_in0_alarm.dev_attr.attr,
644         &dev_attr_in5_input.attr,
645         &dev_attr_in5_min.attr,
646         &dev_attr_in5_max.attr,
647         &sensor_dev_attr_in5_alarm.dev_attr.attr,
648
649         &dev_attr_cpu0_vid.attr,
650         &dev_attr_vrm.attr,
651
652         NULL
653 };
654
655 static const struct attribute_group lm87_group_opt = {
656         .attrs = lm87_attributes_opt,
657 };
658
659 /*
660  * The following function does more than just detection. If detection
661  * succeeds, it also registers the new chip.
662  */
663 static int lm87_detect(struct i2c_adapter *adapter, int address, int kind)
664 {
665         struct i2c_client *new_client;
666         struct lm87_data *data;
667         int err = 0;
668         static const char *names[] = { "lm87", "adm1024" };
669
670         if (!i2c_check_functionality(adapter, I2C_FUNC_SMBUS_BYTE_DATA))
671                 goto exit;
672
673         if (!(data = kzalloc(sizeof(struct lm87_data), GFP_KERNEL))) {
674                 err = -ENOMEM;
675                 goto exit;
676         }
677
678         /* The common I2C client data is placed right before the
679            LM87-specific data. */
680         new_client = &data->client;
681         i2c_set_clientdata(new_client, data);
682         new_client->addr = address;
683         new_client->adapter = adapter;
684         new_client->driver = &lm87_driver;
685         new_client->flags = 0;
686
687         /* Default to an LM87 if forced */
688         if (kind == 0)
689                 kind = lm87;
690
691         /* Now, we do the remaining detection. */
692         if (kind < 0) {
693                 u8 cid = lm87_read_value(new_client, LM87_REG_COMPANY_ID);
694                 u8 rev = lm87_read_value(new_client, LM87_REG_REVISION);
695
696                 if (cid == 0x02                 /* National Semiconductor */
697                  && (rev >= 0x01 && rev <= 0x08))
698                         kind = lm87;
699                 else if (cid == 0x41            /* Analog Devices */
700                       && (rev & 0xf0) == 0x10)
701                         kind = adm1024;
702
703                 if (kind < 0
704                  || (lm87_read_value(new_client, LM87_REG_CONFIG) & 0x80)) {
705                         dev_dbg(&adapter->dev,
706                                 "LM87 detection failed at 0x%02x.\n",
707                                 address);
708                         goto exit_free;
709                 }
710         }
711
712         /* We can fill in the remaining client fields */
713         strlcpy(new_client->name, names[kind - 1], I2C_NAME_SIZE);
714         data->valid = 0;
715         mutex_init(&data->update_lock);
716
717         /* Tell the I2C layer a new client has arrived */
718         if ((err = i2c_attach_client(new_client)))
719                 goto exit_free;
720
721         /* Initialize the LM87 chip */
722         lm87_init_client(new_client);
723
724         data->in_scale[0] = 2500;
725         data->in_scale[1] = 2700;
726         data->in_scale[2] = (data->channel & CHAN_VCC_5V) ? 5000 : 3300;
727         data->in_scale[3] = 5000;
728         data->in_scale[4] = 12000;
729         data->in_scale[5] = 2700;
730         data->in_scale[6] = 1875;
731         data->in_scale[7] = 1875;
732
733         /* Register sysfs hooks */
734         if ((err = sysfs_create_group(&new_client->dev.kobj, &lm87_group)))
735                 goto exit_detach;
736
737         if (data->channel & CHAN_NO_FAN(0)) {
738                 if ((err = device_create_file(&new_client->dev,
739                                         &dev_attr_in6_input))
740                  || (err = device_create_file(&new_client->dev,
741                                         &dev_attr_in6_min))
742                  || (err = device_create_file(&new_client->dev,
743                                         &dev_attr_in6_max))
744                  || (err = device_create_file(&new_client->dev,
745                                         &sensor_dev_attr_in6_alarm.dev_attr)))
746                         goto exit_remove;
747         } else {
748                 if ((err = device_create_file(&new_client->dev,
749                                         &dev_attr_fan1_input))
750                  || (err = device_create_file(&new_client->dev,
751                                         &dev_attr_fan1_min))
752                  || (err = device_create_file(&new_client->dev,
753                                         &dev_attr_fan1_div))
754                  || (err = device_create_file(&new_client->dev,
755                                         &sensor_dev_attr_fan1_alarm.dev_attr)))
756                         goto exit_remove;
757         }
758
759         if (data->channel & CHAN_NO_FAN(1)) {
760                 if ((err = device_create_file(&new_client->dev,
761                                         &dev_attr_in7_input))
762                  || (err = device_create_file(&new_client->dev,
763                                         &dev_attr_in7_min))
764                  || (err = device_create_file(&new_client->dev,
765                                         &dev_attr_in7_max))
766                  || (err = device_create_file(&new_client->dev,
767                                         &sensor_dev_attr_in7_alarm.dev_attr)))
768                         goto exit_remove;
769         } else {
770                 if ((err = device_create_file(&new_client->dev,
771                                         &dev_attr_fan2_input))
772                  || (err = device_create_file(&new_client->dev,
773                                         &dev_attr_fan2_min))
774                  || (err = device_create_file(&new_client->dev,
775                                         &dev_attr_fan2_div))
776                  || (err = device_create_file(&new_client->dev,
777                                         &sensor_dev_attr_fan2_alarm.dev_attr)))
778                         goto exit_remove;
779         }
780
781         if (data->channel & CHAN_TEMP3) {
782                 if ((err = device_create_file(&new_client->dev,
783                                         &dev_attr_temp3_input))
784                  || (err = device_create_file(&new_client->dev,
785                                         &dev_attr_temp3_max))
786                  || (err = device_create_file(&new_client->dev,
787                                         &dev_attr_temp3_min))
788                  || (err = device_create_file(&new_client->dev,
789                                         &dev_attr_temp3_crit))
790                  || (err = device_create_file(&new_client->dev,
791                                         &sensor_dev_attr_temp3_alarm.dev_attr))
792                  || (err = device_create_file(&new_client->dev,
793                                         &sensor_dev_attr_temp3_fault.dev_attr)))
794                         goto exit_remove;
795         } else {
796                 if ((err = device_create_file(&new_client->dev,
797                                         &dev_attr_in0_input))
798                  || (err = device_create_file(&new_client->dev,
799                                         &dev_attr_in0_min))
800                  || (err = device_create_file(&new_client->dev,
801                                         &dev_attr_in0_max))
802                  || (err = device_create_file(&new_client->dev,
803                                         &sensor_dev_attr_in0_alarm.dev_attr))
804                  || (err = device_create_file(&new_client->dev,
805                                         &dev_attr_in5_input))
806                  || (err = device_create_file(&new_client->dev,
807                                         &dev_attr_in5_min))
808                  || (err = device_create_file(&new_client->dev,
809                                         &dev_attr_in5_max))
810                  || (err = device_create_file(&new_client->dev,
811                                         &sensor_dev_attr_in5_alarm.dev_attr)))
812                         goto exit_remove;
813         }
814
815         if (!(data->channel & CHAN_NO_VID)) {
816                 data->vrm = vid_which_vrm();
817                 if ((err = device_create_file(&new_client->dev,
818                                         &dev_attr_cpu0_vid))
819                  || (err = device_create_file(&new_client->dev,
820                                         &dev_attr_vrm)))
821                         goto exit_remove;
822         }
823
824         data->hwmon_dev = hwmon_device_register(&new_client->dev);
825         if (IS_ERR(data->hwmon_dev)) {
826                 err = PTR_ERR(data->hwmon_dev);
827                 goto exit_remove;
828         }
829
830         return 0;
831
832 exit_remove:
833         sysfs_remove_group(&new_client->dev.kobj, &lm87_group);
834         sysfs_remove_group(&new_client->dev.kobj, &lm87_group_opt);
835 exit_detach:
836         i2c_detach_client(new_client);
837 exit_free:
838         kfree(data);
839 exit:
840         return err;
841 }
842
843 static void lm87_init_client(struct i2c_client *client)
844 {
845         struct lm87_data *data = i2c_get_clientdata(client);
846         u8 config;
847
848         data->channel = lm87_read_value(client, LM87_REG_CHANNEL_MODE);
849
850         config = lm87_read_value(client, LM87_REG_CONFIG);
851         if (!(config & 0x01)) {
852                 int i;
853
854                 /* Limits are left uninitialized after power-up */
855                 for (i = 1; i < 6; i++) {
856                         lm87_write_value(client, LM87_REG_IN_MIN(i), 0x00);
857                         lm87_write_value(client, LM87_REG_IN_MAX(i), 0xFF);
858                 }
859                 for (i = 0; i < 2; i++) {
860                         lm87_write_value(client, LM87_REG_TEMP_HIGH[i], 0x7F);
861                         lm87_write_value(client, LM87_REG_TEMP_LOW[i], 0x00);
862                         lm87_write_value(client, LM87_REG_AIN_MIN(i), 0x00);
863                         lm87_write_value(client, LM87_REG_AIN_MAX(i), 0xFF);
864                 }
865                 if (data->channel & CHAN_TEMP3) {
866                         lm87_write_value(client, LM87_REG_TEMP_HIGH[2], 0x7F);
867                         lm87_write_value(client, LM87_REG_TEMP_LOW[2], 0x00);
868                 } else {
869                         lm87_write_value(client, LM87_REG_IN_MIN(0), 0x00);
870                         lm87_write_value(client, LM87_REG_IN_MAX(0), 0xFF);
871                 }
872         }
873         if ((config & 0x81) != 0x01) {
874                 /* Start monitoring */
875                 lm87_write_value(client, LM87_REG_CONFIG,
876                                  (config & 0xF7) | 0x01);
877         }
878 }
879
880 static int lm87_detach_client(struct i2c_client *client)
881 {
882         struct lm87_data *data = i2c_get_clientdata(client);
883         int err;
884
885         hwmon_device_unregister(data->hwmon_dev);
886         sysfs_remove_group(&client->dev.kobj, &lm87_group);
887         sysfs_remove_group(&client->dev.kobj, &lm87_group_opt);
888
889         if ((err = i2c_detach_client(client)))
890                 return err;
891
892         kfree(data);
893         return 0;
894 }
895
896 static struct lm87_data *lm87_update_device(struct device *dev)
897 {
898         struct i2c_client *client = to_i2c_client(dev);
899         struct lm87_data *data = i2c_get_clientdata(client);
900
901         mutex_lock(&data->update_lock);
902
903         if (time_after(jiffies, data->last_updated + HZ) || !data->valid) {
904                 int i, j;
905
906                 dev_dbg(&client->dev, "Updating data.\n");
907
908                 i = (data->channel & CHAN_TEMP3) ? 1 : 0;
909                 j = (data->channel & CHAN_TEMP3) ? 5 : 6;
910                 for (; i < j; i++) {
911                         data->in[i] = lm87_read_value(client,
912                                       LM87_REG_IN(i));
913                         data->in_min[i] = lm87_read_value(client,
914                                           LM87_REG_IN_MIN(i));
915                         data->in_max[i] = lm87_read_value(client,
916                                           LM87_REG_IN_MAX(i));
917                 }
918
919                 for (i = 0; i < 2; i++) {
920                         if (data->channel & CHAN_NO_FAN(i)) {
921                                 data->in[6+i] = lm87_read_value(client,
922                                                 LM87_REG_AIN(i));
923                                 data->in_max[6+i] = lm87_read_value(client,
924                                                     LM87_REG_AIN_MAX(i));
925                                 data->in_min[6+i] = lm87_read_value(client,
926                                                     LM87_REG_AIN_MIN(i));
927
928                         } else {
929                                 data->fan[i] = lm87_read_value(client,
930                                                LM87_REG_FAN(i));
931                                 data->fan_min[i] = lm87_read_value(client,
932                                                    LM87_REG_FAN_MIN(i));
933                         }
934                 }
935
936                 j = (data->channel & CHAN_TEMP3) ? 3 : 2;
937                 for (i = 0 ; i < j; i++) {
938                         data->temp[i] = lm87_read_value(client,
939                                         LM87_REG_TEMP[i]);
940                         data->temp_high[i] = lm87_read_value(client,
941                                              LM87_REG_TEMP_HIGH[i]);
942                         data->temp_low[i] = lm87_read_value(client,
943                                             LM87_REG_TEMP_LOW[i]);
944                 }
945
946                 i = lm87_read_value(client, LM87_REG_TEMP_HW_INT_LOCK);
947                 j = lm87_read_value(client, LM87_REG_TEMP_HW_INT);
948                 data->temp_crit_int = min(i, j);
949
950                 i = lm87_read_value(client, LM87_REG_TEMP_HW_EXT_LOCK);
951                 j = lm87_read_value(client, LM87_REG_TEMP_HW_EXT);
952                 data->temp_crit_ext = min(i, j);
953
954                 i = lm87_read_value(client, LM87_REG_VID_FAN_DIV);
955                 data->fan_div[0] = (i >> 4) & 0x03;
956                 data->fan_div[1] = (i >> 6) & 0x03;
957                 data->vid = (i & 0x0F)
958                           | (lm87_read_value(client, LM87_REG_VID4) & 0x01)
959                              << 4;
960
961                 data->alarms = lm87_read_value(client, LM87_REG_ALARMS1)
962                              | (lm87_read_value(client, LM87_REG_ALARMS2)
963                                 << 8);
964                 data->aout = lm87_read_value(client, LM87_REG_AOUT);
965
966                 data->last_updated = jiffies;
967                 data->valid = 1;
968         }
969
970         mutex_unlock(&data->update_lock);
971
972         return data;
973 }
974
975 static int __init sensors_lm87_init(void)
976 {
977         return i2c_add_driver(&lm87_driver);
978 }
979
980 static void __exit sensors_lm87_exit(void)
981 {
982         i2c_del_driver(&lm87_driver);
983 }
984
985 MODULE_AUTHOR("Jean Delvare <khali@linux-fr.org> and others");
986 MODULE_DESCRIPTION("LM87 driver");
987 MODULE_LICENSE("GPL");
988
989 module_init(sensors_lm87_init);
990 module_exit(sensors_lm87_exit);