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Merge git://git.kernel.org/pub/scm/linux/kernel/git/mason/btrfs-unstable
[linux-2.6/mini2440.git] / drivers / hwmon / lm87.c
blob2e4a3cea95f7e957024d97af9f103551661bdcff
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, int kind,
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_data = &addr_data,
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, int kind,
666 struct i2c_board_info *info)
667 {
668 struct i2c_adapter *adapter = new_client->adapter;
669 static const char *names[] = { "lm87", "adm1024" };
670
671 if (!i2c_check_functionality(adapter, I2C_FUNC_SMBUS_BYTE_DATA))
672 return -ENODEV;
673
674 /* Default to an LM87 if forced */
675 if (kind == 0)
676 kind = lm87;
677
678 /* Now, we do the remaining detection. */
679 if (kind < 0) {
680 u8 cid = lm87_read_value(new_client, LM87_REG_COMPANY_ID);
681 u8 rev = lm87_read_value(new_client, LM87_REG_REVISION);
682
683 if (cid == 0x02 /* National Semiconductor */
684 && (rev >= 0x01 && rev <= 0x08))
685 kind = lm87;
686 else if (cid == 0x41 /* Analog Devices */
687 && (rev & 0xf0) == 0x10)
688 kind = adm1024;
689
690 if (kind < 0
691 || (lm87_read_value(new_client, LM87_REG_CONFIG) & 0x80)) {
692 dev_dbg(&adapter->dev,
693 "LM87 detection failed at 0x%02x.\n",
694 new_client->addr);
695 return -ENODEV;
696 }
697 }
698
699 strlcpy(info->type, names[kind - 1], I2C_NAME_SIZE);
700
701 return 0;
702 }
703
704 static int lm87_probe(struct i2c_client *new_client,
705 const struct i2c_device_id *id)
706 {
707 struct lm87_data *data;
708 int err;
709
710 data = kzalloc(sizeof(struct lm87_data), GFP_KERNEL);
711 if (!data) {
712 err = -ENOMEM;
713 goto exit;
714 }
715
716 i2c_set_clientdata(new_client, data);
717 data->valid = 0;
718 mutex_init(&data->update_lock);
719
720 /* Initialize the LM87 chip */
721 lm87_init_client(new_client);
722
723 data->in_scale[0] = 2500;
724 data->in_scale[1] = 2700;
725 data->in_scale[2] = (data->channel & CHAN_VCC_5V) ? 5000 : 3300;
726 data->in_scale[3] = 5000;
727 data->in_scale[4] = 12000;
728 data->in_scale[5] = 2700;
729 data->in_scale[6] = 1875;
730 data->in_scale[7] = 1875;
731
732 /* Register sysfs hooks */
733 if ((err = sysfs_create_group(&new_client->dev.kobj, &lm87_group)))
734 goto exit_free;
735
736 if (data->channel & CHAN_NO_FAN(0)) {
737 if ((err = device_create_file(&new_client->dev,
738 &dev_attr_in6_input))
739 || (err = device_create_file(&new_client->dev,
740 &dev_attr_in6_min))
741 || (err = device_create_file(&new_client->dev,
742 &dev_attr_in6_max))
743 || (err = device_create_file(&new_client->dev,
744 &sensor_dev_attr_in6_alarm.dev_attr)))
745 goto exit_remove;
746 } else {
747 if ((err = device_create_file(&new_client->dev,
748 &dev_attr_fan1_input))
749 || (err = device_create_file(&new_client->dev,
750 &dev_attr_fan1_min))
751 || (err = device_create_file(&new_client->dev,
752 &dev_attr_fan1_div))
753 || (err = device_create_file(&new_client->dev,
754 &sensor_dev_attr_fan1_alarm.dev_attr)))
755 goto exit_remove;
756 }
757
758 if (data->channel & CHAN_NO_FAN(1)) {
759 if ((err = device_create_file(&new_client->dev,
760 &dev_attr_in7_input))
761 || (err = device_create_file(&new_client->dev,
762 &dev_attr_in7_min))
763 || (err = device_create_file(&new_client->dev,
764 &dev_attr_in7_max))
765 || (err = device_create_file(&new_client->dev,
766 &sensor_dev_attr_in7_alarm.dev_attr)))
767 goto exit_remove;
768 } else {
769 if ((err = device_create_file(&new_client->dev,
770 &dev_attr_fan2_input))
771 || (err = device_create_file(&new_client->dev,
772 &dev_attr_fan2_min))
773 || (err = device_create_file(&new_client->dev,
774 &dev_attr_fan2_div))
775 || (err = device_create_file(&new_client->dev,
776 &sensor_dev_attr_fan2_alarm.dev_attr)))
777 goto exit_remove;
778 }
779
780 if (data->channel & CHAN_TEMP3) {
781 if ((err = device_create_file(&new_client->dev,
782 &dev_attr_temp3_input))
783 || (err = device_create_file(&new_client->dev,
784 &dev_attr_temp3_max))
785 || (err = device_create_file(&new_client->dev,
786 &dev_attr_temp3_min))
787 || (err = device_create_file(&new_client->dev,
788 &dev_attr_temp3_crit))
789 || (err = device_create_file(&new_client->dev,
790 &sensor_dev_attr_temp3_alarm.dev_attr))
791 || (err = device_create_file(&new_client->dev,
792 &sensor_dev_attr_temp3_fault.dev_attr)))
793 goto exit_remove;
794 } else {
795 if ((err = device_create_file(&new_client->dev,
796 &dev_attr_in0_input))
797 || (err = device_create_file(&new_client->dev,
798 &dev_attr_in0_min))
799 || (err = device_create_file(&new_client->dev,
800 &dev_attr_in0_max))
801 || (err = device_create_file(&new_client->dev,
802 &sensor_dev_attr_in0_alarm.dev_attr))
803 || (err = device_create_file(&new_client->dev,
804 &dev_attr_in5_input))
805 || (err = device_create_file(&new_client->dev,
806 &dev_attr_in5_min))
807 || (err = device_create_file(&new_client->dev,
808 &dev_attr_in5_max))
809 || (err = device_create_file(&new_client->dev,
810 &sensor_dev_attr_in5_alarm.dev_attr)))
811 goto exit_remove;
812 }
813
814 if (!(data->channel & CHAN_NO_VID)) {
815 data->vrm = vid_which_vrm();
816 if ((err = device_create_file(&new_client->dev,
817 &dev_attr_cpu0_vid))
818 || (err = device_create_file(&new_client->dev,
819 &dev_attr_vrm)))
820 goto exit_remove;
821 }
822
823 data->hwmon_dev = hwmon_device_register(&new_client->dev);
824 if (IS_ERR(data->hwmon_dev)) {
825 err = PTR_ERR(data->hwmon_dev);
826 goto exit_remove;
827 }
828
829 return 0;
830
831 exit_remove:
832 sysfs_remove_group(&new_client->dev.kobj, &lm87_group);
833 sysfs_remove_group(&new_client->dev.kobj, &lm87_group_opt);
834 exit_free:
835 lm87_write_value(new_client, LM87_REG_CONFIG, data->config);
836 kfree(data);
837 exit:
838 return err;
839 }
840
841 static void lm87_init_client(struct i2c_client *client)
842 {
843 struct lm87_data *data = i2c_get_clientdata(client);
844
845 if (client->dev.platform_data) {
846 data->channel = *(u8 *)client->dev.platform_data;
847 lm87_write_value(client,
848 LM87_REG_CHANNEL_MODE, data->channel);
849 } else {
850 data->channel = lm87_read_value(client, LM87_REG_CHANNEL_MODE);
851 }
852 data->config = lm87_read_value(client, LM87_REG_CONFIG) & 0x6F;
853
854 if (!(data->config & 0x01)) {
855 int i;
856
857 /* Limits are left uninitialized after power-up */
858 for (i = 1; i < 6; i++) {
859 lm87_write_value(client, LM87_REG_IN_MIN(i), 0x00);
860 lm87_write_value(client, LM87_REG_IN_MAX(i), 0xFF);
861 }
862 for (i = 0; i < 2; i++) {
863 lm87_write_value(client, LM87_REG_TEMP_HIGH[i], 0x7F);
864 lm87_write_value(client, LM87_REG_TEMP_LOW[i], 0x00);
865 lm87_write_value(client, LM87_REG_AIN_MIN(i), 0x00);
866 lm87_write_value(client, LM87_REG_AIN_MAX(i), 0xFF);
867 }
868 if (data->channel & CHAN_TEMP3) {
869 lm87_write_value(client, LM87_REG_TEMP_HIGH[2], 0x7F);
870 lm87_write_value(client, LM87_REG_TEMP_LOW[2], 0x00);
871 } else {
872 lm87_write_value(client, LM87_REG_IN_MIN(0), 0x00);
873 lm87_write_value(client, LM87_REG_IN_MAX(0), 0xFF);
874 }
875 }
876
877 /* Make sure Start is set and INT#_Clear is clear */
878 if ((data->config & 0x09) != 0x01)
879 lm87_write_value(client, LM87_REG_CONFIG,
880 (data->config & 0x77) | 0x01);
881 }
882
883 static int lm87_remove(struct i2c_client *client)
884 {
885 struct lm87_data *data = i2c_get_clientdata(client);
886
887 hwmon_device_unregister(data->hwmon_dev);
888 sysfs_remove_group(&client->dev.kobj, &lm87_group);
889 sysfs_remove_group(&client->dev.kobj, &lm87_group_opt);
890
891 lm87_write_value(client, LM87_REG_CONFIG, data->config);
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);
Support for the Chinese Samsung S3C2440 based development boards