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[PATCH] kdump: introduce "reset_devices" command line option
[usb.git] / drivers / hwmon / adm1031.c
blob3bf2da621aedb39f548f139c31f17ab8d88bac81
1 /*
2 adm1031.c - Part of lm_sensors, Linux kernel modules for hardware
3 monitoring
4 Based on lm75.c and lm85.c
5 Supports adm1030 / adm1031
6 Copyright (C) 2004 Alexandre d'Alton <alex@alexdalton.org>
7 Reworked by Jean Delvare <khali@linux-fr.org>
8
9 This program is free software; you can redistribute it and/or modify
10 it under the terms of the GNU General Public License as published by
11 the Free Software Foundation; either version 2 of the License, or
12 (at your option) any later version.
13
14 This program is distributed in the hope that it will be useful,
15 but WITHOUT ANY WARRANTY; without even the implied warranty of
16 MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
17 GNU General Public License for more details.
18
19 You should have received a copy of the GNU General Public License
20 along with this program; if not, write to the Free Software
21 Foundation, Inc., 675 Mass Ave, Cambridge, MA 02139, USA.
22 */
23
24 #include <linux/module.h>
25 #include <linux/init.h>
26 #include <linux/slab.h>
27 #include <linux/jiffies.h>
28 #include <linux/i2c.h>
29 #include <linux/hwmon.h>
30 #include <linux/err.h>
31 #include <linux/mutex.h>
32
33 /* Following macros takes channel parameter starting from 0 to 2 */
34 #define ADM1031_REG_FAN_SPEED(nr) (0x08 + (nr))
35 #define ADM1031_REG_FAN_DIV(nr) (0x20 + (nr))
36 #define ADM1031_REG_PWM (0x22)
37 #define ADM1031_REG_FAN_MIN(nr) (0x10 + (nr))
38
39 #define ADM1031_REG_TEMP_MAX(nr) (0x14 + 4*(nr))
40 #define ADM1031_REG_TEMP_MIN(nr) (0x15 + 4*(nr))
41 #define ADM1031_REG_TEMP_CRIT(nr) (0x16 + 4*(nr))
42
43 #define ADM1031_REG_TEMP(nr) (0xa + (nr))
44 #define ADM1031_REG_AUTO_TEMP(nr) (0x24 + (nr))
45
46 #define ADM1031_REG_STATUS(nr) (0x2 + (nr))
47
48 #define ADM1031_REG_CONF1 0x0
49 #define ADM1031_REG_CONF2 0x1
50 #define ADM1031_REG_EXT_TEMP 0x6
51
52 #define ADM1031_CONF1_MONITOR_ENABLE 0x01 /* Monitoring enable */
53 #define ADM1031_CONF1_PWM_INVERT 0x08 /* PWM Invert */
54 #define ADM1031_CONF1_AUTO_MODE 0x80 /* Auto FAN */
55
56 #define ADM1031_CONF2_PWM1_ENABLE 0x01
57 #define ADM1031_CONF2_PWM2_ENABLE 0x02
58 #define ADM1031_CONF2_TACH1_ENABLE 0x04
59 #define ADM1031_CONF2_TACH2_ENABLE 0x08
60 #define ADM1031_CONF2_TEMP_ENABLE(chan) (0x10 << (chan))
61
62 /* Addresses to scan */
63 static unsigned short normal_i2c[] = { 0x2c, 0x2d, 0x2e, I2C_CLIENT_END };
64
65 /* Insmod parameters */
66 I2C_CLIENT_INSMOD_2(adm1030, adm1031);
67
68 typedef u8 auto_chan_table_t[8][2];
69
70 /* Each client has this additional data */
71 struct adm1031_data {
72 struct i2c_client client;
73 struct class_device *class_dev;
74 struct mutex update_lock;
75 int chip_type;
76 char valid; /* !=0 if following fields are valid */
77 unsigned long last_updated; /* In jiffies */
78 /* The chan_select_table contains the possible configurations for
79 * auto fan control.
80 */
81 auto_chan_table_t *chan_select_table;
82 u16 alarm;
83 u8 conf1;
84 u8 conf2;
85 u8 fan[2];
86 u8 fan_div[2];
87 u8 fan_min[2];
88 u8 pwm[2];
89 u8 old_pwm[2];
90 s8 temp[3];
91 u8 ext_temp[3];
92 u8 auto_temp[3];
93 u8 auto_temp_min[3];
94 u8 auto_temp_off[3];
95 u8 auto_temp_max[3];
96 s8 temp_min[3];
97 s8 temp_max[3];
98 s8 temp_crit[3];
99 };
100
101 static int adm1031_attach_adapter(struct i2c_adapter *adapter);
102 static int adm1031_detect(struct i2c_adapter *adapter, int address, int kind);
103 static void adm1031_init_client(struct i2c_client *client);
104 static int adm1031_detach_client(struct i2c_client *client);
105 static struct adm1031_data *adm1031_update_device(struct device *dev);
106
107 /* This is the driver that will be inserted */
108 static struct i2c_driver adm1031_driver = {
109 .driver = {
110 .name = "adm1031",
111 },
112 .attach_adapter = adm1031_attach_adapter,
113 .detach_client = adm1031_detach_client,
114 };
115
116 static inline u8 adm1031_read_value(struct i2c_client *client, u8 reg)
117 {
118 return i2c_smbus_read_byte_data(client, reg);
119 }
120
121 static inline int
122 adm1031_write_value(struct i2c_client *client, u8 reg, unsigned int value)
123 {
124 return i2c_smbus_write_byte_data(client, reg, value);
125 }
126
127
128 #define TEMP_TO_REG(val) (((val) < 0 ? ((val - 500) / 1000) : \
129 ((val + 500) / 1000)))
130
131 #define TEMP_FROM_REG(val) ((val) * 1000)
132
133 #define TEMP_FROM_REG_EXT(val, ext) (TEMP_FROM_REG(val) + (ext) * 125)
134
135 #define FAN_FROM_REG(reg, div) ((reg) ? (11250 * 60) / ((reg) * (div)) : 0)
136
137 static int FAN_TO_REG(int reg, int div)
138 {
139 int tmp;
140 tmp = FAN_FROM_REG(SENSORS_LIMIT(reg, 0, 65535), div);
141 return tmp > 255 ? 255 : tmp;
142 }
143
144 #define FAN_DIV_FROM_REG(reg) (1<<(((reg)&0xc0)>>6))
145
146 #define PWM_TO_REG(val) (SENSORS_LIMIT((val), 0, 255) >> 4)
147 #define PWM_FROM_REG(val) ((val) << 4)
148
149 #define FAN_CHAN_FROM_REG(reg) (((reg) >> 5) & 7)
150 #define FAN_CHAN_TO_REG(val, reg) \
151 (((reg) & 0x1F) | (((val) << 5) & 0xe0))
152
153 #define AUTO_TEMP_MIN_TO_REG(val, reg) \
154 ((((val)/500) & 0xf8)|((reg) & 0x7))
155 #define AUTO_TEMP_RANGE_FROM_REG(reg) (5000 * (1<< ((reg)&0x7)))
156 #define AUTO_TEMP_MIN_FROM_REG(reg) (1000 * ((((reg) >> 3) & 0x1f) << 2))
157
158 #define AUTO_TEMP_MIN_FROM_REG_DEG(reg) ((((reg) >> 3) & 0x1f) << 2)
159
160 #define AUTO_TEMP_OFF_FROM_REG(reg) \
161 (AUTO_TEMP_MIN_FROM_REG(reg) - 5000)
162
163 #define AUTO_TEMP_MAX_FROM_REG(reg) \
164 (AUTO_TEMP_RANGE_FROM_REG(reg) + \
165 AUTO_TEMP_MIN_FROM_REG(reg))
166
167 static int AUTO_TEMP_MAX_TO_REG(int val, int reg, int pwm)
168 {
169 int ret;
170 int range = val - AUTO_TEMP_MIN_FROM_REG(reg);
171
172 range = ((val - AUTO_TEMP_MIN_FROM_REG(reg))*10)/(16 - pwm);
173 ret = ((reg & 0xf8) |
174 (range < 10000 ? 0 :
175 range < 20000 ? 1 :
176 range < 40000 ? 2 : range < 80000 ? 3 : 4));
177 return ret;
178 }
179
180 /* FAN auto control */
181 #define GET_FAN_AUTO_BITFIELD(data, idx) \
182 (*(data)->chan_select_table)[FAN_CHAN_FROM_REG((data)->conf1)][idx%2]
183
184 /* The tables below contains the possible values for the auto fan
185 * control bitfields. the index in the table is the register value.
186 * MSb is the auto fan control enable bit, so the four first entries
187 * in the table disables auto fan control when both bitfields are zero.
188 */
189 static auto_chan_table_t auto_channel_select_table_adm1031 = {
190 {0, 0}, {0, 0}, {0, 0}, {0, 0},
191 {2 /*0b010 */ , 4 /*0b100 */ },
192 {2 /*0b010 */ , 2 /*0b010 */ },
193 {4 /*0b100 */ , 4 /*0b100 */ },
194 {7 /*0b111 */ , 7 /*0b111 */ },
195 };
196
197 static auto_chan_table_t auto_channel_select_table_adm1030 = {
198 {0, 0}, {0, 0}, {0, 0}, {0, 0},
199 {2 /*0b10 */ , 0},
200 {0xff /*invalid */ , 0},
201 {0xff /*invalid */ , 0},
202 {3 /*0b11 */ , 0},
203 };
204
205 /* That function checks if a bitfield is valid and returns the other bitfield
206 * nearest match if no exact match where found.
207 */
208 static int
209 get_fan_auto_nearest(struct adm1031_data *data,
210 int chan, u8 val, u8 reg, u8 * new_reg)
211 {
212 int i;
213 int first_match = -1, exact_match = -1;
214 u8 other_reg_val =
215 (*data->chan_select_table)[FAN_CHAN_FROM_REG(reg)][chan ? 0 : 1];
216
217 if (val == 0) {
218 *new_reg = 0;
219 return 0;
220 }
221
222 for (i = 0; i < 8; i++) {
223 if ((val == (*data->chan_select_table)[i][chan]) &&
224 ((*data->chan_select_table)[i][chan ? 0 : 1] ==
225 other_reg_val)) {
226 /* We found an exact match */
227 exact_match = i;
228 break;
229 } else if (val == (*data->chan_select_table)[i][chan] &&
230 first_match == -1) {
231 /* Save the first match in case of an exact match has not been
232 * found
233 */
234 first_match = i;
235 }
236 }
237
238 if (exact_match >= 0) {
239 *new_reg = exact_match;
240 } else if (first_match >= 0) {
241 *new_reg = first_match;
242 } else {
243 return -EINVAL;
244 }
245 return 0;
246 }
247
248 static ssize_t show_fan_auto_channel(struct device *dev, char *buf, int nr)
249 {
250 struct adm1031_data *data = adm1031_update_device(dev);
251 return sprintf(buf, "%d\n", GET_FAN_AUTO_BITFIELD(data, nr));
252 }
253
254 static ssize_t
255 set_fan_auto_channel(struct device *dev, const char *buf, size_t count, int nr)
256 {
257 struct i2c_client *client = to_i2c_client(dev);
258 struct adm1031_data *data = i2c_get_clientdata(client);
259 int val = simple_strtol(buf, NULL, 10);
260 u8 reg;
261 int ret;
262 u8 old_fan_mode;
263
264 old_fan_mode = data->conf1;
265
266 mutex_lock(&data->update_lock);
267
268 if ((ret = get_fan_auto_nearest(data, nr, val, data->conf1, &reg))) {
269 mutex_unlock(&data->update_lock);
270 return ret;
271 }
272 if (((data->conf1 = FAN_CHAN_TO_REG(reg, data->conf1)) & ADM1031_CONF1_AUTO_MODE) ^
273 (old_fan_mode & ADM1031_CONF1_AUTO_MODE)) {
274 if (data->conf1 & ADM1031_CONF1_AUTO_MODE){
275 /* Switch to Auto Fan Mode
276 * Save PWM registers
277 * Set PWM registers to 33% Both */
278 data->old_pwm[0] = data->pwm[0];
279 data->old_pwm[1] = data->pwm[1];
280 adm1031_write_value(client, ADM1031_REG_PWM, 0x55);
281 } else {
282 /* Switch to Manual Mode */
283 data->pwm[0] = data->old_pwm[0];
284 data->pwm[1] = data->old_pwm[1];
285 /* Restore PWM registers */
286 adm1031_write_value(client, ADM1031_REG_PWM,
287 data->pwm[0] | (data->pwm[1] << 4));
288 }
289 }
290 data->conf1 = FAN_CHAN_TO_REG(reg, data->conf1);
291 adm1031_write_value(client, ADM1031_REG_CONF1, data->conf1);
292 mutex_unlock(&data->update_lock);
293 return count;
294 }
295
296 #define fan_auto_channel_offset(offset) \
297 static ssize_t show_fan_auto_channel_##offset (struct device *dev, struct device_attribute *attr, char *buf) \
298 { \
299 return show_fan_auto_channel(dev, buf, offset - 1); \
300 } \
301 static ssize_t set_fan_auto_channel_##offset (struct device *dev, struct device_attribute *attr, \
302 const char *buf, size_t count) \
303 { \
304 return set_fan_auto_channel(dev, buf, count, offset - 1); \
305 } \
306 static DEVICE_ATTR(auto_fan##offset##_channel, S_IRUGO | S_IWUSR, \
307 show_fan_auto_channel_##offset, \
308 set_fan_auto_channel_##offset)
309
310 fan_auto_channel_offset(1);
311 fan_auto_channel_offset(2);
312
313 /* Auto Temps */
314 static ssize_t show_auto_temp_off(struct device *dev, char *buf, int nr)
315 {
316 struct adm1031_data *data = adm1031_update_device(dev);
317 return sprintf(buf, "%d\n",
318 AUTO_TEMP_OFF_FROM_REG(data->auto_temp[nr]));
319 }
320 static ssize_t show_auto_temp_min(struct device *dev, char *buf, int nr)
321 {
322 struct adm1031_data *data = adm1031_update_device(dev);
323 return sprintf(buf, "%d\n",
324 AUTO_TEMP_MIN_FROM_REG(data->auto_temp[nr]));
325 }
326 static ssize_t
327 set_auto_temp_min(struct device *dev, const char *buf, size_t count, int nr)
328 {
329 struct i2c_client *client = to_i2c_client(dev);
330 struct adm1031_data *data = i2c_get_clientdata(client);
331 int val = simple_strtol(buf, NULL, 10);
332
333 mutex_lock(&data->update_lock);
334 data->auto_temp[nr] = AUTO_TEMP_MIN_TO_REG(val, data->auto_temp[nr]);
335 adm1031_write_value(client, ADM1031_REG_AUTO_TEMP(nr),
336 data->auto_temp[nr]);
337 mutex_unlock(&data->update_lock);
338 return count;
339 }
340 static ssize_t show_auto_temp_max(struct device *dev, char *buf, int nr)
341 {
342 struct adm1031_data *data = adm1031_update_device(dev);
343 return sprintf(buf, "%d\n",
344 AUTO_TEMP_MAX_FROM_REG(data->auto_temp[nr]));
345 }
346 static ssize_t
347 set_auto_temp_max(struct device *dev, const char *buf, size_t count, int nr)
348 {
349 struct i2c_client *client = to_i2c_client(dev);
350 struct adm1031_data *data = i2c_get_clientdata(client);
351 int val = simple_strtol(buf, NULL, 10);
352
353 mutex_lock(&data->update_lock);
354 data->temp_max[nr] = AUTO_TEMP_MAX_TO_REG(val, data->auto_temp[nr], data->pwm[nr]);
355 adm1031_write_value(client, ADM1031_REG_AUTO_TEMP(nr),
356 data->temp_max[nr]);
357 mutex_unlock(&data->update_lock);
358 return count;
359 }
360
361 #define auto_temp_reg(offset) \
362 static ssize_t show_auto_temp_##offset##_off (struct device *dev, struct device_attribute *attr, char *buf) \
363 { \
364 return show_auto_temp_off(dev, buf, offset - 1); \
365 } \
366 static ssize_t show_auto_temp_##offset##_min (struct device *dev, struct device_attribute *attr, char *buf) \
367 { \
368 return show_auto_temp_min(dev, buf, offset - 1); \
369 } \
370 static ssize_t show_auto_temp_##offset##_max (struct device *dev, struct device_attribute *attr, char *buf) \
371 { \
372 return show_auto_temp_max(dev, buf, offset - 1); \
373 } \
374 static ssize_t set_auto_temp_##offset##_min (struct device *dev, struct device_attribute *attr, \
375 const char *buf, size_t count) \
376 { \
377 return set_auto_temp_min(dev, buf, count, offset - 1); \
378 } \
379 static ssize_t set_auto_temp_##offset##_max (struct device *dev, struct device_attribute *attr, \
380 const char *buf, size_t count) \
381 { \
382 return set_auto_temp_max(dev, buf, count, offset - 1); \
383 } \
384 static DEVICE_ATTR(auto_temp##offset##_off, S_IRUGO, \
385 show_auto_temp_##offset##_off, NULL); \
386 static DEVICE_ATTR(auto_temp##offset##_min, S_IRUGO | S_IWUSR, \
387 show_auto_temp_##offset##_min, set_auto_temp_##offset##_min);\
388 static DEVICE_ATTR(auto_temp##offset##_max, S_IRUGO | S_IWUSR, \
389 show_auto_temp_##offset##_max, set_auto_temp_##offset##_max)
390
391 auto_temp_reg(1);
392 auto_temp_reg(2);
393 auto_temp_reg(3);
394
395 /* pwm */
396 static ssize_t show_pwm(struct device *dev, char *buf, int nr)
397 {
398 struct adm1031_data *data = adm1031_update_device(dev);
399 return sprintf(buf, "%d\n", PWM_FROM_REG(data->pwm[nr]));
400 }
401 static ssize_t
402 set_pwm(struct device *dev, const char *buf, size_t count, int nr)
403 {
404 struct i2c_client *client = to_i2c_client(dev);
405 struct adm1031_data *data = i2c_get_clientdata(client);
406 int val = simple_strtol(buf, NULL, 10);
407 int reg;
408
409 mutex_lock(&data->update_lock);
410 if ((data->conf1 & ADM1031_CONF1_AUTO_MODE) &&
411 (((val>>4) & 0xf) != 5)) {
412 /* In automatic mode, the only PWM accepted is 33% */
413 mutex_unlock(&data->update_lock);
414 return -EINVAL;
415 }
416 data->pwm[nr] = PWM_TO_REG(val);
417 reg = adm1031_read_value(client, ADM1031_REG_PWM);
418 adm1031_write_value(client, ADM1031_REG_PWM,
419 nr ? ((data->pwm[nr] << 4) & 0xf0) | (reg & 0xf)
420 : (data->pwm[nr] & 0xf) | (reg & 0xf0));
421 mutex_unlock(&data->update_lock);
422 return count;
423 }
424
425 #define pwm_reg(offset) \
426 static ssize_t show_pwm_##offset (struct device *dev, struct device_attribute *attr, char *buf) \
427 { \
428 return show_pwm(dev, buf, offset - 1); \
429 } \
430 static ssize_t set_pwm_##offset (struct device *dev, struct device_attribute *attr, \
431 const char *buf, size_t count) \
432 { \
433 return set_pwm(dev, buf, count, offset - 1); \
434 } \
435 static DEVICE_ATTR(pwm##offset, S_IRUGO | S_IWUSR, \
436 show_pwm_##offset, set_pwm_##offset)
437
438 pwm_reg(1);
439 pwm_reg(2);
440
441 /* Fans */
442
443 /*
444 * That function checks the cases where the fan reading is not
445 * relevant. It is used to provide 0 as fan reading when the fan is
446 * not supposed to run
447 */
448 static int trust_fan_readings(struct adm1031_data *data, int chan)
449 {
450 int res = 0;
451
452 if (data->conf1 & ADM1031_CONF1_AUTO_MODE) {
453 switch (data->conf1 & 0x60) {
454 case 0x00: /* remote temp1 controls fan1 remote temp2 controls fan2 */
455 res = data->temp[chan+1] >=
456 AUTO_TEMP_MIN_FROM_REG_DEG(data->auto_temp[chan+1]);
457 break;
458 case 0x20: /* remote temp1 controls both fans */
459 res =
460 data->temp[1] >=
461 AUTO_TEMP_MIN_FROM_REG_DEG(data->auto_temp[1]);
462 break;
463 case 0x40: /* remote temp2 controls both fans */
464 res =
465 data->temp[2] >=
466 AUTO_TEMP_MIN_FROM_REG_DEG(data->auto_temp[2]);
467 break;
468 case 0x60: /* max controls both fans */
469 res =
470 data->temp[0] >=
471 AUTO_TEMP_MIN_FROM_REG_DEG(data->auto_temp[0])
472 || data->temp[1] >=
473 AUTO_TEMP_MIN_FROM_REG_DEG(data->auto_temp[1])
474 || (data->chip_type == adm1031
475 && data->temp[2] >=
476 AUTO_TEMP_MIN_FROM_REG_DEG(data->auto_temp[2]));
477 break;
478 }
479 } else {
480 res = data->pwm[chan] > 0;
481 }
482 return res;
483 }
484
485
486 static ssize_t show_fan(struct device *dev, char *buf, int nr)
487 {
488 struct adm1031_data *data = adm1031_update_device(dev);
489 int value;
490
491 value = trust_fan_readings(data, nr) ? FAN_FROM_REG(data->fan[nr],
492 FAN_DIV_FROM_REG(data->fan_div[nr])) : 0;
493 return sprintf(buf, "%d\n", value);
494 }
495
496 static ssize_t show_fan_div(struct device *dev, char *buf, int nr)
497 {
498 struct adm1031_data *data = adm1031_update_device(dev);
499 return sprintf(buf, "%d\n", FAN_DIV_FROM_REG(data->fan_div[nr]));
500 }
501 static ssize_t show_fan_min(struct device *dev, char *buf, int nr)
502 {
503 struct adm1031_data *data = adm1031_update_device(dev);
504 return sprintf(buf, "%d\n",
505 FAN_FROM_REG(data->fan_min[nr],
506 FAN_DIV_FROM_REG(data->fan_div[nr])));
507 }
508 static ssize_t
509 set_fan_min(struct device *dev, const char *buf, size_t count, int nr)
510 {
511 struct i2c_client *client = to_i2c_client(dev);
512 struct adm1031_data *data = i2c_get_clientdata(client);
513 int val = simple_strtol(buf, NULL, 10);
514
515 mutex_lock(&data->update_lock);
516 if (val) {
517 data->fan_min[nr] =
518 FAN_TO_REG(val, FAN_DIV_FROM_REG(data->fan_div[nr]));
519 } else {
520 data->fan_min[nr] = 0xff;
521 }
522 adm1031_write_value(client, ADM1031_REG_FAN_MIN(nr), data->fan_min[nr]);
523 mutex_unlock(&data->update_lock);
524 return count;
525 }
526 static ssize_t
527 set_fan_div(struct device *dev, const char *buf, size_t count, int nr)
528 {
529 struct i2c_client *client = to_i2c_client(dev);
530 struct adm1031_data *data = i2c_get_clientdata(client);
531 int val = simple_strtol(buf, NULL, 10);
532 u8 tmp;
533 int old_div;
534 int new_min;
535
536 tmp = val == 8 ? 0xc0 :
537 val == 4 ? 0x80 :
538 val == 2 ? 0x40 :
539 val == 1 ? 0x00 :
540 0xff;
541 if (tmp == 0xff)
542 return -EINVAL;
543
544 mutex_lock(&data->update_lock);
545 old_div = FAN_DIV_FROM_REG(data->fan_div[nr]);
546 data->fan_div[nr] = (tmp & 0xC0) | (0x3f & data->fan_div[nr]);
547 new_min = data->fan_min[nr] * old_div /
548 FAN_DIV_FROM_REG(data->fan_div[nr]);
549 data->fan_min[nr] = new_min > 0xff ? 0xff : new_min;
550 data->fan[nr] = data->fan[nr] * old_div /
551 FAN_DIV_FROM_REG(data->fan_div[nr]);
552
553 adm1031_write_value(client, ADM1031_REG_FAN_DIV(nr),
554 data->fan_div[nr]);
555 adm1031_write_value(client, ADM1031_REG_FAN_MIN(nr),
556 data->fan_min[nr]);
557 mutex_unlock(&data->update_lock);
558 return count;
559 }
560
561 #define fan_offset(offset) \
562 static ssize_t show_fan_##offset (struct device *dev, struct device_attribute *attr, char *buf) \
563 { \
564 return show_fan(dev, buf, offset - 1); \
565 } \
566 static ssize_t show_fan_##offset##_min (struct device *dev, struct device_attribute *attr, char *buf) \
567 { \
568 return show_fan_min(dev, buf, offset - 1); \
569 } \
570 static ssize_t show_fan_##offset##_div (struct device *dev, struct device_attribute *attr, char *buf) \
571 { \
572 return show_fan_div(dev, buf, offset - 1); \
573 } \
574 static ssize_t set_fan_##offset##_min (struct device *dev, struct device_attribute *attr, \
575 const char *buf, size_t count) \
576 { \
577 return set_fan_min(dev, buf, count, offset - 1); \
578 } \
579 static ssize_t set_fan_##offset##_div (struct device *dev, struct device_attribute *attr, \
580 const char *buf, size_t count) \
581 { \
582 return set_fan_div(dev, buf, count, offset - 1); \
583 } \
584 static DEVICE_ATTR(fan##offset##_input, S_IRUGO, show_fan_##offset, \
585 NULL); \
586 static DEVICE_ATTR(fan##offset##_min, S_IRUGO | S_IWUSR, \
587 show_fan_##offset##_min, set_fan_##offset##_min); \
588 static DEVICE_ATTR(fan##offset##_div, S_IRUGO | S_IWUSR, \
589 show_fan_##offset##_div, set_fan_##offset##_div); \
590 static DEVICE_ATTR(auto_fan##offset##_min_pwm, S_IRUGO | S_IWUSR, \
591 show_pwm_##offset, set_pwm_##offset)
592
593 fan_offset(1);
594 fan_offset(2);
595
596
597 /* Temps */
598 static ssize_t show_temp(struct device *dev, char *buf, int nr)
599 {
600 struct adm1031_data *data = adm1031_update_device(dev);
601 int ext;
602 ext = nr == 0 ?
603 ((data->ext_temp[nr] >> 6) & 0x3) * 2 :
604 (((data->ext_temp[nr] >> ((nr - 1) * 3)) & 7));
605 return sprintf(buf, "%d\n", TEMP_FROM_REG_EXT(data->temp[nr], ext));
606 }
607 static ssize_t show_temp_min(struct device *dev, char *buf, int nr)
608 {
609 struct adm1031_data *data = adm1031_update_device(dev);
610 return sprintf(buf, "%d\n", TEMP_FROM_REG(data->temp_min[nr]));
611 }
612 static ssize_t show_temp_max(struct device *dev, char *buf, int nr)
613 {
614 struct adm1031_data *data = adm1031_update_device(dev);
615 return sprintf(buf, "%d\n", TEMP_FROM_REG(data->temp_max[nr]));
616 }
617 static ssize_t show_temp_crit(struct device *dev, char *buf, int nr)
618 {
619 struct adm1031_data *data = adm1031_update_device(dev);
620 return sprintf(buf, "%d\n", TEMP_FROM_REG(data->temp_crit[nr]));
621 }
622 static ssize_t
623 set_temp_min(struct device *dev, const char *buf, size_t count, int nr)
624 {
625 struct i2c_client *client = to_i2c_client(dev);
626 struct adm1031_data *data = i2c_get_clientdata(client);
627 int val;
628
629 val = simple_strtol(buf, NULL, 10);
630 val = SENSORS_LIMIT(val, -55000, nr == 0 ? 127750 : 127875);
631 mutex_lock(&data->update_lock);
632 data->temp_min[nr] = TEMP_TO_REG(val);
633 adm1031_write_value(client, ADM1031_REG_TEMP_MIN(nr),
634 data->temp_min[nr]);
635 mutex_unlock(&data->update_lock);
636 return count;
637 }
638 static ssize_t
639 set_temp_max(struct device *dev, const char *buf, size_t count, int nr)
640 {
641 struct i2c_client *client = to_i2c_client(dev);
642 struct adm1031_data *data = i2c_get_clientdata(client);
643 int val;
644
645 val = simple_strtol(buf, NULL, 10);
646 val = SENSORS_LIMIT(val, -55000, nr == 0 ? 127750 : 127875);
647 mutex_lock(&data->update_lock);
648 data->temp_max[nr] = TEMP_TO_REG(val);
649 adm1031_write_value(client, ADM1031_REG_TEMP_MAX(nr),
650 data->temp_max[nr]);
651 mutex_unlock(&data->update_lock);
652 return count;
653 }
654 static ssize_t
655 set_temp_crit(struct device *dev, const char *buf, size_t count, int nr)
656 {
657 struct i2c_client *client = to_i2c_client(dev);
658 struct adm1031_data *data = i2c_get_clientdata(client);
659 int val;
660
661 val = simple_strtol(buf, NULL, 10);
662 val = SENSORS_LIMIT(val, -55000, nr == 0 ? 127750 : 127875);
663 mutex_lock(&data->update_lock);
664 data->temp_crit[nr] = TEMP_TO_REG(val);
665 adm1031_write_value(client, ADM1031_REG_TEMP_CRIT(nr),
666 data->temp_crit[nr]);
667 mutex_unlock(&data->update_lock);
668 return count;
669 }
670
671 #define temp_reg(offset) \
672 static ssize_t show_temp_##offset (struct device *dev, struct device_attribute *attr, char *buf) \
673 { \
674 return show_temp(dev, buf, offset - 1); \
675 } \
676 static ssize_t show_temp_##offset##_min (struct device *dev, struct device_attribute *attr, char *buf) \
677 { \
678 return show_temp_min(dev, buf, offset - 1); \
679 } \
680 static ssize_t show_temp_##offset##_max (struct device *dev, struct device_attribute *attr, char *buf) \
681 { \
682 return show_temp_max(dev, buf, offset - 1); \
683 } \
684 static ssize_t show_temp_##offset##_crit (struct device *dev, struct device_attribute *attr, char *buf) \
685 { \
686 return show_temp_crit(dev, buf, offset - 1); \
687 } \
688 static ssize_t set_temp_##offset##_min (struct device *dev, struct device_attribute *attr, \
689 const char *buf, size_t count) \
690 { \
691 return set_temp_min(dev, buf, count, offset - 1); \
692 } \
693 static ssize_t set_temp_##offset##_max (struct device *dev, struct device_attribute *attr, \
694 const char *buf, size_t count) \
695 { \
696 return set_temp_max(dev, buf, count, offset - 1); \
697 } \
698 static ssize_t set_temp_##offset##_crit (struct device *dev, struct device_attribute *attr, \
699 const char *buf, size_t count) \
700 { \
701 return set_temp_crit(dev, buf, count, offset - 1); \
702 } \
703 static DEVICE_ATTR(temp##offset##_input, S_IRUGO, show_temp_##offset, \
704 NULL); \
705 static DEVICE_ATTR(temp##offset##_min, S_IRUGO | S_IWUSR, \
706 show_temp_##offset##_min, set_temp_##offset##_min); \
707 static DEVICE_ATTR(temp##offset##_max, S_IRUGO | S_IWUSR, \
708 show_temp_##offset##_max, set_temp_##offset##_max); \
709 static DEVICE_ATTR(temp##offset##_crit, S_IRUGO | S_IWUSR, \
710 show_temp_##offset##_crit, set_temp_##offset##_crit)
711
712 temp_reg(1);
713 temp_reg(2);
714 temp_reg(3);
715
716 /* Alarms */
717 static ssize_t show_alarms(struct device *dev, struct device_attribute *attr, char *buf)
718 {
719 struct adm1031_data *data = adm1031_update_device(dev);
720 return sprintf(buf, "%d\n", data->alarm);
721 }
722
723 static DEVICE_ATTR(alarms, S_IRUGO, show_alarms, NULL);
724
725
726 static int adm1031_attach_adapter(struct i2c_adapter *adapter)
727 {
728 if (!(adapter->class & I2C_CLASS_HWMON))
729 return 0;
730 return i2c_probe(adapter, &addr_data, adm1031_detect);
731 }
732
733 /* This function is called by i2c_probe */
734 static int adm1031_detect(struct i2c_adapter *adapter, int address, int kind)
735 {
736 struct i2c_client *new_client;
737 struct adm1031_data *data;
738 int err = 0;
739 const char *name = "";
740
741 if (!i2c_check_functionality(adapter, I2C_FUNC_SMBUS_BYTE_DATA))
742 goto exit;
743
744 if (!(data = kzalloc(sizeof(struct adm1031_data), GFP_KERNEL))) {
745 err = -ENOMEM;
746 goto exit;
747 }
748
749 new_client = &data->client;
750 i2c_set_clientdata(new_client, data);
751 new_client->addr = address;
752 new_client->adapter = adapter;
753 new_client->driver = &adm1031_driver;
754 new_client->flags = 0;
755
756 if (kind < 0) {
757 int id, co;
758 id = i2c_smbus_read_byte_data(new_client, 0x3d);
759 co = i2c_smbus_read_byte_data(new_client, 0x3e);
760
761 if (!((id == 0x31 || id == 0x30) && co == 0x41))
762 goto exit_free;
763 kind = (id == 0x30) ? adm1030 : adm1031;
764 }
765
766 if (kind <= 0)
767 kind = adm1031;
768
769 /* Given the detected chip type, set the chip name and the
770 * auto fan control helper table. */
771 if (kind == adm1030) {
772 name = "adm1030";
773 data->chan_select_table = &auto_channel_select_table_adm1030;
774 } else if (kind == adm1031) {
775 name = "adm1031";
776 data->chan_select_table = &auto_channel_select_table_adm1031;
777 }
778 data->chip_type = kind;
779
780 strlcpy(new_client->name, name, I2C_NAME_SIZE);
781 data->valid = 0;
782 mutex_init(&data->update_lock);
783
784 /* Tell the I2C layer a new client has arrived */
785 if ((err = i2c_attach_client(new_client)))
786 goto exit_free;
787
788 /* Initialize the ADM1031 chip */
789 adm1031_init_client(new_client);
790
791 /* Register sysfs hooks */
792 data->class_dev = hwmon_device_register(&new_client->dev);
793 if (IS_ERR(data->class_dev)) {
794 err = PTR_ERR(data->class_dev);
795 goto exit_detach;
796 }
797
798 device_create_file(&new_client->dev, &dev_attr_fan1_input);
799 device_create_file(&new_client->dev, &dev_attr_fan1_div);
800 device_create_file(&new_client->dev, &dev_attr_fan1_min);
801 device_create_file(&new_client->dev, &dev_attr_pwm1);
802 device_create_file(&new_client->dev, &dev_attr_auto_fan1_channel);
803 device_create_file(&new_client->dev, &dev_attr_temp1_input);
804 device_create_file(&new_client->dev, &dev_attr_temp1_min);
805 device_create_file(&new_client->dev, &dev_attr_temp1_max);
806 device_create_file(&new_client->dev, &dev_attr_temp1_crit);
807 device_create_file(&new_client->dev, &dev_attr_temp2_input);
808 device_create_file(&new_client->dev, &dev_attr_temp2_min);
809 device_create_file(&new_client->dev, &dev_attr_temp2_max);
810 device_create_file(&new_client->dev, &dev_attr_temp2_crit);
811
812 device_create_file(&new_client->dev, &dev_attr_auto_temp1_off);
813 device_create_file(&new_client->dev, &dev_attr_auto_temp1_min);
814 device_create_file(&new_client->dev, &dev_attr_auto_temp1_max);
815
816 device_create_file(&new_client->dev, &dev_attr_auto_temp2_off);
817 device_create_file(&new_client->dev, &dev_attr_auto_temp2_min);
818 device_create_file(&new_client->dev, &dev_attr_auto_temp2_max);
819
820 device_create_file(&new_client->dev, &dev_attr_auto_fan1_min_pwm);
821
822 device_create_file(&new_client->dev, &dev_attr_alarms);
823
824 if (kind == adm1031) {
825 device_create_file(&new_client->dev, &dev_attr_fan2_input);
826 device_create_file(&new_client->dev, &dev_attr_fan2_div);
827 device_create_file(&new_client->dev, &dev_attr_fan2_min);
828 device_create_file(&new_client->dev, &dev_attr_pwm2);
829 device_create_file(&new_client->dev,
830 &dev_attr_auto_fan2_channel);
831 device_create_file(&new_client->dev, &dev_attr_temp3_input);
832 device_create_file(&new_client->dev, &dev_attr_temp3_min);
833 device_create_file(&new_client->dev, &dev_attr_temp3_max);
834 device_create_file(&new_client->dev, &dev_attr_temp3_crit);
835 device_create_file(&new_client->dev, &dev_attr_auto_temp3_off);
836 device_create_file(&new_client->dev, &dev_attr_auto_temp3_min);
837 device_create_file(&new_client->dev, &dev_attr_auto_temp3_max);
838 device_create_file(&new_client->dev, &dev_attr_auto_fan2_min_pwm);
839 }
840
841 return 0;
842
843 exit_detach:
844 i2c_detach_client(new_client);
845 exit_free:
846 kfree(data);
847 exit:
848 return err;
849 }
850
851 static int adm1031_detach_client(struct i2c_client *client)
852 {
853 struct adm1031_data *data = i2c_get_clientdata(client);
854 int ret;
855
856 hwmon_device_unregister(data->class_dev);
857 if ((ret = i2c_detach_client(client)) != 0) {
858 return ret;
859 }
860 kfree(data);
861 return 0;
862 }
863
864 static void adm1031_init_client(struct i2c_client *client)
865 {
866 unsigned int read_val;
867 unsigned int mask;
868 struct adm1031_data *data = i2c_get_clientdata(client);
869
870 mask = (ADM1031_CONF2_PWM1_ENABLE | ADM1031_CONF2_TACH1_ENABLE);
871 if (data->chip_type == adm1031) {
872 mask |= (ADM1031_CONF2_PWM2_ENABLE |
873 ADM1031_CONF2_TACH2_ENABLE);
874 }
875 /* Initialize the ADM1031 chip (enables fan speed reading ) */
876 read_val = adm1031_read_value(client, ADM1031_REG_CONF2);
877 if ((read_val | mask) != read_val) {
878 adm1031_write_value(client, ADM1031_REG_CONF2, read_val | mask);
879 }
880
881 read_val = adm1031_read_value(client, ADM1031_REG_CONF1);
882 if ((read_val | ADM1031_CONF1_MONITOR_ENABLE) != read_val) {
883 adm1031_write_value(client, ADM1031_REG_CONF1, read_val |
884 ADM1031_CONF1_MONITOR_ENABLE);
885 }
886
887 }
888
889 static struct adm1031_data *adm1031_update_device(struct device *dev)
890 {
891 struct i2c_client *client = to_i2c_client(dev);
892 struct adm1031_data *data = i2c_get_clientdata(client);
893 int chan;
894
895 mutex_lock(&data->update_lock);
896
897 if (time_after(jiffies, data->last_updated + HZ + HZ / 2)
898 || !data->valid) {
899
900 dev_dbg(&client->dev, "Starting adm1031 update\n");
901 for (chan = 0;
902 chan < ((data->chip_type == adm1031) ? 3 : 2); chan++) {
903 u8 oldh, newh;
904
905 oldh =
906 adm1031_read_value(client, ADM1031_REG_TEMP(chan));
907 data->ext_temp[chan] =
908 adm1031_read_value(client, ADM1031_REG_EXT_TEMP);
909 newh =
910 adm1031_read_value(client, ADM1031_REG_TEMP(chan));
911 if (newh != oldh) {
912 data->ext_temp[chan] =
913 adm1031_read_value(client,
914 ADM1031_REG_EXT_TEMP);
915 #ifdef DEBUG
916 oldh =
917 adm1031_read_value(client,
918 ADM1031_REG_TEMP(chan));
919
920 /* oldh is actually newer */
921 if (newh != oldh)
922 dev_warn(&client->dev,
923 "Remote temperature may be "
924 "wrong.\n");
925 #endif
926 }
927 data->temp[chan] = newh;
928
929 data->temp_min[chan] =
930 adm1031_read_value(client,
931 ADM1031_REG_TEMP_MIN(chan));
932 data->temp_max[chan] =
933 adm1031_read_value(client,
934 ADM1031_REG_TEMP_MAX(chan));
935 data->temp_crit[chan] =
936 adm1031_read_value(client,
937 ADM1031_REG_TEMP_CRIT(chan));
938 data->auto_temp[chan] =
939 adm1031_read_value(client,
940 ADM1031_REG_AUTO_TEMP(chan));
941
942 }
943
944 data->conf1 = adm1031_read_value(client, ADM1031_REG_CONF1);
945 data->conf2 = adm1031_read_value(client, ADM1031_REG_CONF2);
946
947 data->alarm = adm1031_read_value(client, ADM1031_REG_STATUS(0))
948 | (adm1031_read_value(client, ADM1031_REG_STATUS(1))
949 << 8);
950 if (data->chip_type == adm1030) {
951 data->alarm &= 0xc0ff;
952 }
953
954 for (chan=0; chan<(data->chip_type == adm1030 ? 1 : 2); chan++) {
955 data->fan_div[chan] =
956 adm1031_read_value(client, ADM1031_REG_FAN_DIV(chan));
957 data->fan_min[chan] =
958 adm1031_read_value(client, ADM1031_REG_FAN_MIN(chan));
959 data->fan[chan] =
960 adm1031_read_value(client, ADM1031_REG_FAN_SPEED(chan));
961 data->pwm[chan] =
962 0xf & (adm1031_read_value(client, ADM1031_REG_PWM) >>
963 (4*chan));
964 }
965 data->last_updated = jiffies;
966 data->valid = 1;
967 }
968
969 mutex_unlock(&data->update_lock);
970
971 return data;
972 }
973
974 static int __init sensors_adm1031_init(void)
975 {
976 return i2c_add_driver(&adm1031_driver);
977 }
978
979 static void __exit sensors_adm1031_exit(void)
980 {
981 i2c_del_driver(&adm1031_driver);
982 }
983
984 MODULE_AUTHOR("Alexandre d'Alton <alex@alexdalton.org>");
985 MODULE_DESCRIPTION("ADM1031/ADM1030 driver");
986 MODULE_LICENSE("GPL");
987
988 module_init(sensors_adm1031_init);
989 module_exit(sensors_adm1031_exit);
USB Experimental Work