2 * adm1031.c - Part of lm_sensors, Linux kernel modules for hardware
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>
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.
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.
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.
24 #include <linux/module.h>
25 #include <linux/init.h>
26 #include <linux/slab.h>
27 #include <linux/jiffies.h>
28 #include <linux/i2c.h>
29 #include <linux/hwmon.h>
30 #include <linux/hwmon-sysfs.h>
31 #include <linux/err.h>
32 #include <linux/mutex.h>
34 /* Following macros takes channel parameter starting from 0 to 2 */
35 #define ADM1031_REG_FAN_SPEED(nr) (0x08 + (nr))
36 #define ADM1031_REG_FAN_DIV(nr) (0x20 + (nr))
37 #define ADM1031_REG_PWM (0x22)
38 #define ADM1031_REG_FAN_MIN(nr) (0x10 + (nr))
39 #define ADM1031_REG_FAN_FILTER (0x23)
41 #define ADM1031_REG_TEMP_OFFSET(nr) (0x0d + (nr))
42 #define ADM1031_REG_TEMP_MAX(nr) (0x14 + 4 * (nr))
43 #define ADM1031_REG_TEMP_MIN(nr) (0x15 + 4 * (nr))
44 #define ADM1031_REG_TEMP_CRIT(nr) (0x16 + 4 * (nr))
46 #define ADM1031_REG_TEMP(nr) (0x0a + (nr))
47 #define ADM1031_REG_AUTO_TEMP(nr) (0x24 + (nr))
49 #define ADM1031_REG_STATUS(nr) (0x2 + (nr))
51 #define ADM1031_REG_CONF1 0x00
52 #define ADM1031_REG_CONF2 0x01
53 #define ADM1031_REG_EXT_TEMP 0x06
55 #define ADM1031_CONF1_MONITOR_ENABLE 0x01 /* Monitoring enable */
56 #define ADM1031_CONF1_PWM_INVERT 0x08 /* PWM Invert */
57 #define ADM1031_CONF1_AUTO_MODE 0x80 /* Auto FAN */
59 #define ADM1031_CONF2_PWM1_ENABLE 0x01
60 #define ADM1031_CONF2_PWM2_ENABLE 0x02
61 #define ADM1031_CONF2_TACH1_ENABLE 0x04
62 #define ADM1031_CONF2_TACH2_ENABLE 0x08
63 #define ADM1031_CONF2_TEMP_ENABLE(chan) (0x10 << (chan))
65 #define ADM1031_UPDATE_RATE_MASK 0x1c
66 #define ADM1031_UPDATE_RATE_SHIFT 2
68 /* Addresses to scan */
69 static const unsigned short normal_i2c[] = { 0x2c, 0x2d, 0x2e, I2C_CLIENT_END };
71 enum chips { adm1030, adm1031 };
73 typedef u8 auto_chan_table_t[8][2];
75 /* Each client has this additional data */
77 struct device *hwmon_dev;
78 struct mutex update_lock;
80 char valid; /* !=0 if following fields are valid */
81 unsigned long last_updated; /* In jiffies */
82 unsigned int update_interval; /* In milliseconds */
84 * The chan_select_table contains the possible configurations for
87 const auto_chan_table_t *chan_select_table;
108 static int adm1031_probe(struct i2c_client *client,
109 const struct i2c_device_id *id);
110 static int adm1031_detect(struct i2c_client *client,
111 struct i2c_board_info *info);
112 static void adm1031_init_client(struct i2c_client *client);
113 static int adm1031_remove(struct i2c_client *client);
114 static struct adm1031_data *adm1031_update_device(struct device *dev);
116 static const struct i2c_device_id adm1031_id[] = {
117 { "adm1030", adm1030 },
118 { "adm1031", adm1031 },
121 MODULE_DEVICE_TABLE(i2c, adm1031_id);
123 /* This is the driver that will be inserted */
124 static struct i2c_driver adm1031_driver = {
125 .class = I2C_CLASS_HWMON,
129 .probe = adm1031_probe,
130 .remove = adm1031_remove,
131 .id_table = adm1031_id,
132 .detect = adm1031_detect,
133 .address_list = normal_i2c,
136 static inline u8 adm1031_read_value(struct i2c_client *client, u8 reg)
138 return i2c_smbus_read_byte_data(client, reg);
142 adm1031_write_value(struct i2c_client *client, u8 reg, unsigned int value)
144 return i2c_smbus_write_byte_data(client, reg, value);
148 #define TEMP_TO_REG(val) (((val) < 0 ? ((val - 500) / 1000) : \
149 ((val + 500) / 1000)))
151 #define TEMP_FROM_REG(val) ((val) * 1000)
153 #define TEMP_FROM_REG_EXT(val, ext) (TEMP_FROM_REG(val) + (ext) * 125)
155 #define TEMP_OFFSET_TO_REG(val) (TEMP_TO_REG(val) & 0x8f)
156 #define TEMP_OFFSET_FROM_REG(val) TEMP_FROM_REG((val) < 0 ? \
157 (val) | 0x70 : (val))
159 #define FAN_FROM_REG(reg, div) ((reg) ? \
160 (11250 * 60) / ((reg) * (div)) : 0)
162 static int FAN_TO_REG(int reg, int div)
165 tmp = FAN_FROM_REG(SENSORS_LIMIT(reg, 0, 65535), div);
166 return tmp > 255 ? 255 : tmp;
169 #define FAN_DIV_FROM_REG(reg) (1<<(((reg)&0xc0)>>6))
171 #define PWM_TO_REG(val) (SENSORS_LIMIT((val), 0, 255) >> 4)
172 #define PWM_FROM_REG(val) ((val) << 4)
174 #define FAN_CHAN_FROM_REG(reg) (((reg) >> 5) & 7)
175 #define FAN_CHAN_TO_REG(val, reg) \
176 (((reg) & 0x1F) | (((val) << 5) & 0xe0))
178 #define AUTO_TEMP_MIN_TO_REG(val, reg) \
179 ((((val) / 500) & 0xf8) | ((reg) & 0x7))
180 #define AUTO_TEMP_RANGE_FROM_REG(reg) (5000 * (1 << ((reg) & 0x7)))
181 #define AUTO_TEMP_MIN_FROM_REG(reg) (1000 * ((((reg) >> 3) & 0x1f) << 2))
183 #define AUTO_TEMP_MIN_FROM_REG_DEG(reg) ((((reg) >> 3) & 0x1f) << 2)
185 #define AUTO_TEMP_OFF_FROM_REG(reg) \
186 (AUTO_TEMP_MIN_FROM_REG(reg) - 5000)
188 #define AUTO_TEMP_MAX_FROM_REG(reg) \
189 (AUTO_TEMP_RANGE_FROM_REG(reg) + \
190 AUTO_TEMP_MIN_FROM_REG(reg))
192 static int AUTO_TEMP_MAX_TO_REG(int val, int reg, int pwm)
195 int range = val - AUTO_TEMP_MIN_FROM_REG(reg);
197 range = ((val - AUTO_TEMP_MIN_FROM_REG(reg))*10)/(16 - pwm);
198 ret = ((reg & 0xf8) |
201 range < 40000 ? 2 : range < 80000 ? 3 : 4));
205 /* FAN auto control */
206 #define GET_FAN_AUTO_BITFIELD(data, idx) \
207 (*(data)->chan_select_table)[FAN_CHAN_FROM_REG((data)->conf1)][idx % 2]
210 * The tables below contains the possible values for the auto fan
211 * control bitfields. the index in the table is the register value.
212 * MSb is the auto fan control enable bit, so the four first entries
213 * in the table disables auto fan control when both bitfields are zero.
215 static const auto_chan_table_t auto_channel_select_table_adm1031 = {
216 { 0, 0 }, { 0, 0 }, { 0, 0 }, { 0, 0 },
217 { 2 /* 0b010 */ , 4 /* 0b100 */ },
218 { 2 /* 0b010 */ , 2 /* 0b010 */ },
219 { 4 /* 0b100 */ , 4 /* 0b100 */ },
220 { 7 /* 0b111 */ , 7 /* 0b111 */ },
223 static const auto_chan_table_t auto_channel_select_table_adm1030 = {
224 { 0, 0 }, { 0, 0 }, { 0, 0 }, { 0, 0 },
225 { 2 /* 0b10 */ , 0 },
226 { 0xff /* invalid */ , 0 },
227 { 0xff /* invalid */ , 0 },
228 { 3 /* 0b11 */ , 0 },
232 * That function checks if a bitfield is valid and returns the other bitfield
233 * nearest match if no exact match where found.
236 get_fan_auto_nearest(struct adm1031_data *data,
237 int chan, u8 val, u8 reg, u8 *new_reg)
240 int first_match = -1, exact_match = -1;
242 (*data->chan_select_table)[FAN_CHAN_FROM_REG(reg)][chan ? 0 : 1];
249 for (i = 0; i < 8; i++) {
250 if ((val == (*data->chan_select_table)[i][chan]) &&
251 ((*data->chan_select_table)[i][chan ? 0 : 1] ==
253 /* We found an exact match */
256 } else if (val == (*data->chan_select_table)[i][chan] &&
259 * Save the first match in case of an exact match has
266 if (exact_match >= 0)
267 *new_reg = exact_match;
268 else if (first_match >= 0)
269 *new_reg = first_match;
276 static ssize_t show_fan_auto_channel(struct device *dev,
277 struct device_attribute *attr, char *buf)
279 int nr = to_sensor_dev_attr(attr)->index;
280 struct adm1031_data *data = adm1031_update_device(dev);
281 return sprintf(buf, "%d\n", GET_FAN_AUTO_BITFIELD(data, nr));
285 set_fan_auto_channel(struct device *dev, struct device_attribute *attr,
286 const char *buf, size_t count)
288 struct i2c_client *client = to_i2c_client(dev);
289 struct adm1031_data *data = i2c_get_clientdata(client);
290 int nr = to_sensor_dev_attr(attr)->index;
296 ret = kstrtol(buf, 10, &val);
300 old_fan_mode = data->conf1;
302 mutex_lock(&data->update_lock);
304 ret = get_fan_auto_nearest(data, nr, val, data->conf1, ®);
306 mutex_unlock(&data->update_lock);
309 data->conf1 = FAN_CHAN_TO_REG(reg, data->conf1);
310 if ((data->conf1 & ADM1031_CONF1_AUTO_MODE) ^
311 (old_fan_mode & ADM1031_CONF1_AUTO_MODE)) {
312 if (data->conf1 & ADM1031_CONF1_AUTO_MODE) {
314 * Switch to Auto Fan Mode
316 * Set PWM registers to 33% Both
318 data->old_pwm[0] = data->pwm[0];
319 data->old_pwm[1] = data->pwm[1];
320 adm1031_write_value(client, ADM1031_REG_PWM, 0x55);
322 /* Switch to Manual Mode */
323 data->pwm[0] = data->old_pwm[0];
324 data->pwm[1] = data->old_pwm[1];
325 /* Restore PWM registers */
326 adm1031_write_value(client, ADM1031_REG_PWM,
327 data->pwm[0] | (data->pwm[1] << 4));
330 data->conf1 = FAN_CHAN_TO_REG(reg, data->conf1);
331 adm1031_write_value(client, ADM1031_REG_CONF1, data->conf1);
332 mutex_unlock(&data->update_lock);
336 static SENSOR_DEVICE_ATTR(auto_fan1_channel, S_IRUGO | S_IWUSR,
337 show_fan_auto_channel, set_fan_auto_channel, 0);
338 static SENSOR_DEVICE_ATTR(auto_fan2_channel, S_IRUGO | S_IWUSR,
339 show_fan_auto_channel, set_fan_auto_channel, 1);
342 static ssize_t show_auto_temp_off(struct device *dev,
343 struct device_attribute *attr, char *buf)
345 int nr = to_sensor_dev_attr(attr)->index;
346 struct adm1031_data *data = adm1031_update_device(dev);
347 return sprintf(buf, "%d\n",
348 AUTO_TEMP_OFF_FROM_REG(data->auto_temp[nr]));
350 static ssize_t show_auto_temp_min(struct device *dev,
351 struct device_attribute *attr, char *buf)
353 int nr = to_sensor_dev_attr(attr)->index;
354 struct adm1031_data *data = adm1031_update_device(dev);
355 return sprintf(buf, "%d\n",
356 AUTO_TEMP_MIN_FROM_REG(data->auto_temp[nr]));
359 set_auto_temp_min(struct device *dev, struct device_attribute *attr,
360 const char *buf, size_t count)
362 struct i2c_client *client = to_i2c_client(dev);
363 struct adm1031_data *data = i2c_get_clientdata(client);
364 int nr = to_sensor_dev_attr(attr)->index;
368 ret = kstrtol(buf, 10, &val);
372 mutex_lock(&data->update_lock);
373 data->auto_temp[nr] = AUTO_TEMP_MIN_TO_REG(val, data->auto_temp[nr]);
374 adm1031_write_value(client, ADM1031_REG_AUTO_TEMP(nr),
375 data->auto_temp[nr]);
376 mutex_unlock(&data->update_lock);
379 static ssize_t show_auto_temp_max(struct device *dev,
380 struct device_attribute *attr, char *buf)
382 int nr = to_sensor_dev_attr(attr)->index;
383 struct adm1031_data *data = adm1031_update_device(dev);
384 return sprintf(buf, "%d\n",
385 AUTO_TEMP_MAX_FROM_REG(data->auto_temp[nr]));
388 set_auto_temp_max(struct device *dev, struct device_attribute *attr,
389 const char *buf, size_t count)
391 struct i2c_client *client = to_i2c_client(dev);
392 struct adm1031_data *data = i2c_get_clientdata(client);
393 int nr = to_sensor_dev_attr(attr)->index;
397 ret = kstrtol(buf, 10, &val);
401 mutex_lock(&data->update_lock);
402 data->temp_max[nr] = AUTO_TEMP_MAX_TO_REG(val, data->auto_temp[nr],
404 adm1031_write_value(client, ADM1031_REG_AUTO_TEMP(nr),
406 mutex_unlock(&data->update_lock);
410 #define auto_temp_reg(offset) \
411 static SENSOR_DEVICE_ATTR(auto_temp##offset##_off, S_IRUGO, \
412 show_auto_temp_off, NULL, offset - 1); \
413 static SENSOR_DEVICE_ATTR(auto_temp##offset##_min, S_IRUGO | S_IWUSR, \
414 show_auto_temp_min, set_auto_temp_min, offset - 1); \
415 static SENSOR_DEVICE_ATTR(auto_temp##offset##_max, S_IRUGO | S_IWUSR, \
416 show_auto_temp_max, set_auto_temp_max, offset - 1)
423 static ssize_t show_pwm(struct device *dev,
424 struct device_attribute *attr, char *buf)
426 int nr = to_sensor_dev_attr(attr)->index;
427 struct adm1031_data *data = adm1031_update_device(dev);
428 return sprintf(buf, "%d\n", PWM_FROM_REG(data->pwm[nr]));
430 static ssize_t set_pwm(struct device *dev, struct device_attribute *attr,
431 const char *buf, size_t count)
433 struct i2c_client *client = to_i2c_client(dev);
434 struct adm1031_data *data = i2c_get_clientdata(client);
435 int nr = to_sensor_dev_attr(attr)->index;
439 ret = kstrtol(buf, 10, &val);
443 mutex_lock(&data->update_lock);
444 if ((data->conf1 & ADM1031_CONF1_AUTO_MODE) &&
445 (((val>>4) & 0xf) != 5)) {
446 /* In automatic mode, the only PWM accepted is 33% */
447 mutex_unlock(&data->update_lock);
450 data->pwm[nr] = PWM_TO_REG(val);
451 reg = adm1031_read_value(client, ADM1031_REG_PWM);
452 adm1031_write_value(client, ADM1031_REG_PWM,
453 nr ? ((data->pwm[nr] << 4) & 0xf0) | (reg & 0xf)
454 : (data->pwm[nr] & 0xf) | (reg & 0xf0));
455 mutex_unlock(&data->update_lock);
459 static SENSOR_DEVICE_ATTR(pwm1, S_IRUGO | S_IWUSR, show_pwm, set_pwm, 0);
460 static SENSOR_DEVICE_ATTR(pwm2, S_IRUGO | S_IWUSR, show_pwm, set_pwm, 1);
461 static SENSOR_DEVICE_ATTR(auto_fan1_min_pwm, S_IRUGO | S_IWUSR,
462 show_pwm, set_pwm, 0);
463 static SENSOR_DEVICE_ATTR(auto_fan2_min_pwm, S_IRUGO | S_IWUSR,
464 show_pwm, set_pwm, 1);
469 * That function checks the cases where the fan reading is not
470 * relevant. It is used to provide 0 as fan reading when the fan is
471 * not supposed to run
473 static int trust_fan_readings(struct adm1031_data *data, int chan)
477 if (data->conf1 & ADM1031_CONF1_AUTO_MODE) {
478 switch (data->conf1 & 0x60) {
481 * remote temp1 controls fan1,
482 * remote temp2 controls fan2
484 res = data->temp[chan+1] >=
485 AUTO_TEMP_MIN_FROM_REG_DEG(data->auto_temp[chan+1]);
487 case 0x20: /* remote temp1 controls both fans */
490 AUTO_TEMP_MIN_FROM_REG_DEG(data->auto_temp[1]);
492 case 0x40: /* remote temp2 controls both fans */
495 AUTO_TEMP_MIN_FROM_REG_DEG(data->auto_temp[2]);
497 case 0x60: /* max controls both fans */
500 AUTO_TEMP_MIN_FROM_REG_DEG(data->auto_temp[0])
502 AUTO_TEMP_MIN_FROM_REG_DEG(data->auto_temp[1])
503 || (data->chip_type == adm1031
505 AUTO_TEMP_MIN_FROM_REG_DEG(data->auto_temp[2]));
509 res = data->pwm[chan] > 0;
515 static ssize_t show_fan(struct device *dev,
516 struct device_attribute *attr, char *buf)
518 int nr = to_sensor_dev_attr(attr)->index;
519 struct adm1031_data *data = adm1031_update_device(dev);
522 value = trust_fan_readings(data, nr) ? FAN_FROM_REG(data->fan[nr],
523 FAN_DIV_FROM_REG(data->fan_div[nr])) : 0;
524 return sprintf(buf, "%d\n", value);
527 static ssize_t show_fan_div(struct device *dev,
528 struct device_attribute *attr, char *buf)
530 int nr = to_sensor_dev_attr(attr)->index;
531 struct adm1031_data *data = adm1031_update_device(dev);
532 return sprintf(buf, "%d\n", FAN_DIV_FROM_REG(data->fan_div[nr]));
534 static ssize_t show_fan_min(struct device *dev,
535 struct device_attribute *attr, char *buf)
537 int nr = to_sensor_dev_attr(attr)->index;
538 struct adm1031_data *data = adm1031_update_device(dev);
539 return sprintf(buf, "%d\n",
540 FAN_FROM_REG(data->fan_min[nr],
541 FAN_DIV_FROM_REG(data->fan_div[nr])));
543 static ssize_t set_fan_min(struct device *dev, struct device_attribute *attr,
544 const char *buf, size_t count)
546 struct i2c_client *client = to_i2c_client(dev);
547 struct adm1031_data *data = i2c_get_clientdata(client);
548 int nr = to_sensor_dev_attr(attr)->index;
552 ret = kstrtol(buf, 10, &val);
556 mutex_lock(&data->update_lock);
559 FAN_TO_REG(val, FAN_DIV_FROM_REG(data->fan_div[nr]));
561 data->fan_min[nr] = 0xff;
563 adm1031_write_value(client, ADM1031_REG_FAN_MIN(nr), data->fan_min[nr]);
564 mutex_unlock(&data->update_lock);
567 static ssize_t set_fan_div(struct device *dev, struct device_attribute *attr,
568 const char *buf, size_t count)
570 struct i2c_client *client = to_i2c_client(dev);
571 struct adm1031_data *data = i2c_get_clientdata(client);
572 int nr = to_sensor_dev_attr(attr)->index;
579 ret = kstrtol(buf, 10, &val);
583 tmp = val == 8 ? 0xc0 :
591 mutex_lock(&data->update_lock);
592 /* Get fresh readings */
593 data->fan_div[nr] = adm1031_read_value(client,
594 ADM1031_REG_FAN_DIV(nr));
595 data->fan_min[nr] = adm1031_read_value(client,
596 ADM1031_REG_FAN_MIN(nr));
598 /* Write the new clock divider and fan min */
599 old_div = FAN_DIV_FROM_REG(data->fan_div[nr]);
600 data->fan_div[nr] = tmp | (0x3f & data->fan_div[nr]);
601 new_min = data->fan_min[nr] * old_div / val;
602 data->fan_min[nr] = new_min > 0xff ? 0xff : new_min;
604 adm1031_write_value(client, ADM1031_REG_FAN_DIV(nr),
606 adm1031_write_value(client, ADM1031_REG_FAN_MIN(nr),
609 /* Invalidate the cache: fan speed is no longer valid */
611 mutex_unlock(&data->update_lock);
615 #define fan_offset(offset) \
616 static SENSOR_DEVICE_ATTR(fan##offset##_input, S_IRUGO, \
617 show_fan, NULL, offset - 1); \
618 static SENSOR_DEVICE_ATTR(fan##offset##_min, S_IRUGO | S_IWUSR, \
619 show_fan_min, set_fan_min, offset - 1); \
620 static SENSOR_DEVICE_ATTR(fan##offset##_div, S_IRUGO | S_IWUSR, \
621 show_fan_div, set_fan_div, offset - 1)
628 static ssize_t show_temp(struct device *dev,
629 struct device_attribute *attr, char *buf)
631 int nr = to_sensor_dev_attr(attr)->index;
632 struct adm1031_data *data = adm1031_update_device(dev);
635 ((data->ext_temp[nr] >> 6) & 0x3) * 2 :
636 (((data->ext_temp[nr] >> ((nr - 1) * 3)) & 7));
637 return sprintf(buf, "%d\n", TEMP_FROM_REG_EXT(data->temp[nr], ext));
639 static ssize_t show_temp_offset(struct device *dev,
640 struct device_attribute *attr, char *buf)
642 int nr = to_sensor_dev_attr(attr)->index;
643 struct adm1031_data *data = adm1031_update_device(dev);
644 return sprintf(buf, "%d\n",
645 TEMP_OFFSET_FROM_REG(data->temp_offset[nr]));
647 static ssize_t show_temp_min(struct device *dev,
648 struct device_attribute *attr, char *buf)
650 int nr = to_sensor_dev_attr(attr)->index;
651 struct adm1031_data *data = adm1031_update_device(dev);
652 return sprintf(buf, "%d\n", TEMP_FROM_REG(data->temp_min[nr]));
654 static ssize_t show_temp_max(struct device *dev,
655 struct device_attribute *attr, char *buf)
657 int nr = to_sensor_dev_attr(attr)->index;
658 struct adm1031_data *data = adm1031_update_device(dev);
659 return sprintf(buf, "%d\n", TEMP_FROM_REG(data->temp_max[nr]));
661 static ssize_t show_temp_crit(struct device *dev,
662 struct device_attribute *attr, char *buf)
664 int nr = to_sensor_dev_attr(attr)->index;
665 struct adm1031_data *data = adm1031_update_device(dev);
666 return sprintf(buf, "%d\n", TEMP_FROM_REG(data->temp_crit[nr]));
668 static ssize_t set_temp_offset(struct device *dev,
669 struct device_attribute *attr, const char *buf,
672 struct i2c_client *client = to_i2c_client(dev);
673 struct adm1031_data *data = i2c_get_clientdata(client);
674 int nr = to_sensor_dev_attr(attr)->index;
678 ret = kstrtol(buf, 10, &val);
682 val = SENSORS_LIMIT(val, -15000, 15000);
683 mutex_lock(&data->update_lock);
684 data->temp_offset[nr] = TEMP_OFFSET_TO_REG(val);
685 adm1031_write_value(client, ADM1031_REG_TEMP_OFFSET(nr),
686 data->temp_offset[nr]);
687 mutex_unlock(&data->update_lock);
690 static ssize_t set_temp_min(struct device *dev, struct device_attribute *attr,
691 const char *buf, size_t count)
693 struct i2c_client *client = to_i2c_client(dev);
694 struct adm1031_data *data = i2c_get_clientdata(client);
695 int nr = to_sensor_dev_attr(attr)->index;
699 ret = kstrtol(buf, 10, &val);
703 val = SENSORS_LIMIT(val, -55000, nr == 0 ? 127750 : 127875);
704 mutex_lock(&data->update_lock);
705 data->temp_min[nr] = TEMP_TO_REG(val);
706 adm1031_write_value(client, ADM1031_REG_TEMP_MIN(nr),
708 mutex_unlock(&data->update_lock);
711 static ssize_t set_temp_max(struct device *dev, struct device_attribute *attr,
712 const char *buf, size_t count)
714 struct i2c_client *client = to_i2c_client(dev);
715 struct adm1031_data *data = i2c_get_clientdata(client);
716 int nr = to_sensor_dev_attr(attr)->index;
720 ret = kstrtol(buf, 10, &val);
724 val = SENSORS_LIMIT(val, -55000, nr == 0 ? 127750 : 127875);
725 mutex_lock(&data->update_lock);
726 data->temp_max[nr] = TEMP_TO_REG(val);
727 adm1031_write_value(client, ADM1031_REG_TEMP_MAX(nr),
729 mutex_unlock(&data->update_lock);
732 static ssize_t set_temp_crit(struct device *dev, struct device_attribute *attr,
733 const char *buf, size_t count)
735 struct i2c_client *client = to_i2c_client(dev);
736 struct adm1031_data *data = i2c_get_clientdata(client);
737 int nr = to_sensor_dev_attr(attr)->index;
741 ret = kstrtol(buf, 10, &val);
745 val = SENSORS_LIMIT(val, -55000, nr == 0 ? 127750 : 127875);
746 mutex_lock(&data->update_lock);
747 data->temp_crit[nr] = TEMP_TO_REG(val);
748 adm1031_write_value(client, ADM1031_REG_TEMP_CRIT(nr),
749 data->temp_crit[nr]);
750 mutex_unlock(&data->update_lock);
754 #define temp_reg(offset) \
755 static SENSOR_DEVICE_ATTR(temp##offset##_input, S_IRUGO, \
756 show_temp, NULL, offset - 1); \
757 static SENSOR_DEVICE_ATTR(temp##offset##_offset, S_IRUGO | S_IWUSR, \
758 show_temp_offset, set_temp_offset, offset - 1); \
759 static SENSOR_DEVICE_ATTR(temp##offset##_min, S_IRUGO | S_IWUSR, \
760 show_temp_min, set_temp_min, offset - 1); \
761 static SENSOR_DEVICE_ATTR(temp##offset##_max, S_IRUGO | S_IWUSR, \
762 show_temp_max, set_temp_max, offset - 1); \
763 static SENSOR_DEVICE_ATTR(temp##offset##_crit, S_IRUGO | S_IWUSR, \
764 show_temp_crit, set_temp_crit, offset - 1)
771 static ssize_t show_alarms(struct device *dev, struct device_attribute *attr,
774 struct adm1031_data *data = adm1031_update_device(dev);
775 return sprintf(buf, "%d\n", data->alarm);
778 static DEVICE_ATTR(alarms, S_IRUGO, show_alarms, NULL);
780 static ssize_t show_alarm(struct device *dev,
781 struct device_attribute *attr, char *buf)
783 int bitnr = to_sensor_dev_attr(attr)->index;
784 struct adm1031_data *data = adm1031_update_device(dev);
785 return sprintf(buf, "%d\n", (data->alarm >> bitnr) & 1);
788 static SENSOR_DEVICE_ATTR(fan1_alarm, S_IRUGO, show_alarm, NULL, 0);
789 static SENSOR_DEVICE_ATTR(fan1_fault, S_IRUGO, show_alarm, NULL, 1);
790 static SENSOR_DEVICE_ATTR(temp2_max_alarm, S_IRUGO, show_alarm, NULL, 2);
791 static SENSOR_DEVICE_ATTR(temp2_min_alarm, S_IRUGO, show_alarm, NULL, 3);
792 static SENSOR_DEVICE_ATTR(temp2_crit_alarm, S_IRUGO, show_alarm, NULL, 4);
793 static SENSOR_DEVICE_ATTR(temp2_fault, S_IRUGO, show_alarm, NULL, 5);
794 static SENSOR_DEVICE_ATTR(temp1_max_alarm, S_IRUGO, show_alarm, NULL, 6);
795 static SENSOR_DEVICE_ATTR(temp1_min_alarm, S_IRUGO, show_alarm, NULL, 7);
796 static SENSOR_DEVICE_ATTR(fan2_alarm, S_IRUGO, show_alarm, NULL, 8);
797 static SENSOR_DEVICE_ATTR(fan2_fault, S_IRUGO, show_alarm, NULL, 9);
798 static SENSOR_DEVICE_ATTR(temp3_max_alarm, S_IRUGO, show_alarm, NULL, 10);
799 static SENSOR_DEVICE_ATTR(temp3_min_alarm, S_IRUGO, show_alarm, NULL, 11);
800 static SENSOR_DEVICE_ATTR(temp3_crit_alarm, S_IRUGO, show_alarm, NULL, 12);
801 static SENSOR_DEVICE_ATTR(temp3_fault, S_IRUGO, show_alarm, NULL, 13);
802 static SENSOR_DEVICE_ATTR(temp1_crit_alarm, S_IRUGO, show_alarm, NULL, 14);
804 /* Update Interval */
805 static const unsigned int update_intervals[] = {
806 16000, 8000, 4000, 2000, 1000, 500, 250, 125,
809 static ssize_t show_update_interval(struct device *dev,
810 struct device_attribute *attr, char *buf)
812 struct i2c_client *client = to_i2c_client(dev);
813 struct adm1031_data *data = i2c_get_clientdata(client);
815 return sprintf(buf, "%u\n", data->update_interval);
818 static ssize_t set_update_interval(struct device *dev,
819 struct device_attribute *attr,
820 const char *buf, size_t count)
822 struct i2c_client *client = to_i2c_client(dev);
823 struct adm1031_data *data = i2c_get_clientdata(client);
828 err = kstrtoul(buf, 10, &val);
833 * Find the nearest update interval from the table.
834 * Use it to determine the matching update rate.
836 for (i = 0; i < ARRAY_SIZE(update_intervals) - 1; i++) {
837 if (val >= update_intervals[i])
840 /* if not found, we point to the last entry (lowest update interval) */
842 /* set the new update rate while preserving other settings */
843 reg = adm1031_read_value(client, ADM1031_REG_FAN_FILTER);
844 reg &= ~ADM1031_UPDATE_RATE_MASK;
845 reg |= i << ADM1031_UPDATE_RATE_SHIFT;
846 adm1031_write_value(client, ADM1031_REG_FAN_FILTER, reg);
848 mutex_lock(&data->update_lock);
849 data->update_interval = update_intervals[i];
850 mutex_unlock(&data->update_lock);
855 static DEVICE_ATTR(update_interval, S_IRUGO | S_IWUSR, show_update_interval,
856 set_update_interval);
858 static struct attribute *adm1031_attributes[] = {
859 &sensor_dev_attr_fan1_input.dev_attr.attr,
860 &sensor_dev_attr_fan1_div.dev_attr.attr,
861 &sensor_dev_attr_fan1_min.dev_attr.attr,
862 &sensor_dev_attr_fan1_alarm.dev_attr.attr,
863 &sensor_dev_attr_fan1_fault.dev_attr.attr,
864 &sensor_dev_attr_pwm1.dev_attr.attr,
865 &sensor_dev_attr_auto_fan1_channel.dev_attr.attr,
866 &sensor_dev_attr_temp1_input.dev_attr.attr,
867 &sensor_dev_attr_temp1_offset.dev_attr.attr,
868 &sensor_dev_attr_temp1_min.dev_attr.attr,
869 &sensor_dev_attr_temp1_min_alarm.dev_attr.attr,
870 &sensor_dev_attr_temp1_max.dev_attr.attr,
871 &sensor_dev_attr_temp1_max_alarm.dev_attr.attr,
872 &sensor_dev_attr_temp1_crit.dev_attr.attr,
873 &sensor_dev_attr_temp1_crit_alarm.dev_attr.attr,
874 &sensor_dev_attr_temp2_input.dev_attr.attr,
875 &sensor_dev_attr_temp2_offset.dev_attr.attr,
876 &sensor_dev_attr_temp2_min.dev_attr.attr,
877 &sensor_dev_attr_temp2_min_alarm.dev_attr.attr,
878 &sensor_dev_attr_temp2_max.dev_attr.attr,
879 &sensor_dev_attr_temp2_max_alarm.dev_attr.attr,
880 &sensor_dev_attr_temp2_crit.dev_attr.attr,
881 &sensor_dev_attr_temp2_crit_alarm.dev_attr.attr,
882 &sensor_dev_attr_temp2_fault.dev_attr.attr,
884 &sensor_dev_attr_auto_temp1_off.dev_attr.attr,
885 &sensor_dev_attr_auto_temp1_min.dev_attr.attr,
886 &sensor_dev_attr_auto_temp1_max.dev_attr.attr,
888 &sensor_dev_attr_auto_temp2_off.dev_attr.attr,
889 &sensor_dev_attr_auto_temp2_min.dev_attr.attr,
890 &sensor_dev_attr_auto_temp2_max.dev_attr.attr,
892 &sensor_dev_attr_auto_fan1_min_pwm.dev_attr.attr,
894 &dev_attr_update_interval.attr,
895 &dev_attr_alarms.attr,
900 static const struct attribute_group adm1031_group = {
901 .attrs = adm1031_attributes,
904 static struct attribute *adm1031_attributes_opt[] = {
905 &sensor_dev_attr_fan2_input.dev_attr.attr,
906 &sensor_dev_attr_fan2_div.dev_attr.attr,
907 &sensor_dev_attr_fan2_min.dev_attr.attr,
908 &sensor_dev_attr_fan2_alarm.dev_attr.attr,
909 &sensor_dev_attr_fan2_fault.dev_attr.attr,
910 &sensor_dev_attr_pwm2.dev_attr.attr,
911 &sensor_dev_attr_auto_fan2_channel.dev_attr.attr,
912 &sensor_dev_attr_temp3_input.dev_attr.attr,
913 &sensor_dev_attr_temp3_offset.dev_attr.attr,
914 &sensor_dev_attr_temp3_min.dev_attr.attr,
915 &sensor_dev_attr_temp3_min_alarm.dev_attr.attr,
916 &sensor_dev_attr_temp3_max.dev_attr.attr,
917 &sensor_dev_attr_temp3_max_alarm.dev_attr.attr,
918 &sensor_dev_attr_temp3_crit.dev_attr.attr,
919 &sensor_dev_attr_temp3_crit_alarm.dev_attr.attr,
920 &sensor_dev_attr_temp3_fault.dev_attr.attr,
921 &sensor_dev_attr_auto_temp3_off.dev_attr.attr,
922 &sensor_dev_attr_auto_temp3_min.dev_attr.attr,
923 &sensor_dev_attr_auto_temp3_max.dev_attr.attr,
924 &sensor_dev_attr_auto_fan2_min_pwm.dev_attr.attr,
928 static const struct attribute_group adm1031_group_opt = {
929 .attrs = adm1031_attributes_opt,
932 /* Return 0 if detection is successful, -ENODEV otherwise */
933 static int adm1031_detect(struct i2c_client *client,
934 struct i2c_board_info *info)
936 struct i2c_adapter *adapter = client->adapter;
940 if (!i2c_check_functionality(adapter, I2C_FUNC_SMBUS_BYTE_DATA))
943 id = i2c_smbus_read_byte_data(client, 0x3d);
944 co = i2c_smbus_read_byte_data(client, 0x3e);
946 if (!((id == 0x31 || id == 0x30) && co == 0x41))
948 name = (id == 0x30) ? "adm1030" : "adm1031";
950 strlcpy(info->type, name, I2C_NAME_SIZE);
955 static int adm1031_probe(struct i2c_client *client,
956 const struct i2c_device_id *id)
958 struct adm1031_data *data;
961 data = kzalloc(sizeof(struct adm1031_data), GFP_KERNEL);
967 i2c_set_clientdata(client, data);
968 data->chip_type = id->driver_data;
969 mutex_init(&data->update_lock);
971 if (data->chip_type == adm1030)
972 data->chan_select_table = &auto_channel_select_table_adm1030;
974 data->chan_select_table = &auto_channel_select_table_adm1031;
976 /* Initialize the ADM1031 chip */
977 adm1031_init_client(client);
979 /* Register sysfs hooks */
980 err = sysfs_create_group(&client->dev.kobj, &adm1031_group);
984 if (data->chip_type == adm1031) {
985 err = sysfs_create_group(&client->dev.kobj, &adm1031_group_opt);
990 data->hwmon_dev = hwmon_device_register(&client->dev);
991 if (IS_ERR(data->hwmon_dev)) {
992 err = PTR_ERR(data->hwmon_dev);
999 sysfs_remove_group(&client->dev.kobj, &adm1031_group);
1000 sysfs_remove_group(&client->dev.kobj, &adm1031_group_opt);
1007 static int adm1031_remove(struct i2c_client *client)
1009 struct adm1031_data *data = i2c_get_clientdata(client);
1011 hwmon_device_unregister(data->hwmon_dev);
1012 sysfs_remove_group(&client->dev.kobj, &adm1031_group);
1013 sysfs_remove_group(&client->dev.kobj, &adm1031_group_opt);
1018 static void adm1031_init_client(struct i2c_client *client)
1020 unsigned int read_val;
1023 struct adm1031_data *data = i2c_get_clientdata(client);
1025 mask = (ADM1031_CONF2_PWM1_ENABLE | ADM1031_CONF2_TACH1_ENABLE);
1026 if (data->chip_type == adm1031) {
1027 mask |= (ADM1031_CONF2_PWM2_ENABLE |
1028 ADM1031_CONF2_TACH2_ENABLE);
1030 /* Initialize the ADM1031 chip (enables fan speed reading ) */
1031 read_val = adm1031_read_value(client, ADM1031_REG_CONF2);
1032 if ((read_val | mask) != read_val)
1033 adm1031_write_value(client, ADM1031_REG_CONF2, read_val | mask);
1035 read_val = adm1031_read_value(client, ADM1031_REG_CONF1);
1036 if ((read_val | ADM1031_CONF1_MONITOR_ENABLE) != read_val) {
1037 adm1031_write_value(client, ADM1031_REG_CONF1,
1038 read_val | ADM1031_CONF1_MONITOR_ENABLE);
1041 /* Read the chip's update rate */
1042 mask = ADM1031_UPDATE_RATE_MASK;
1043 read_val = adm1031_read_value(client, ADM1031_REG_FAN_FILTER);
1044 i = (read_val & mask) >> ADM1031_UPDATE_RATE_SHIFT;
1045 /* Save it as update interval */
1046 data->update_interval = update_intervals[i];
1049 static struct adm1031_data *adm1031_update_device(struct device *dev)
1051 struct i2c_client *client = to_i2c_client(dev);
1052 struct adm1031_data *data = i2c_get_clientdata(client);
1053 unsigned long next_update;
1056 mutex_lock(&data->update_lock);
1058 next_update = data->last_updated
1059 + msecs_to_jiffies(data->update_interval);
1060 if (time_after(jiffies, next_update) || !data->valid) {
1062 dev_dbg(&client->dev, "Starting adm1031 update\n");
1064 chan < ((data->chip_type == adm1031) ? 3 : 2); chan++) {
1068 adm1031_read_value(client, ADM1031_REG_TEMP(chan));
1069 data->ext_temp[chan] =
1070 adm1031_read_value(client, ADM1031_REG_EXT_TEMP);
1072 adm1031_read_value(client, ADM1031_REG_TEMP(chan));
1074 data->ext_temp[chan] =
1075 adm1031_read_value(client,
1076 ADM1031_REG_EXT_TEMP);
1079 adm1031_read_value(client,
1080 ADM1031_REG_TEMP(chan));
1082 /* oldh is actually newer */
1084 dev_warn(&client->dev,
1085 "Remote temperature may be wrong.\n");
1088 data->temp[chan] = newh;
1090 data->temp_offset[chan] =
1091 adm1031_read_value(client,
1092 ADM1031_REG_TEMP_OFFSET(chan));
1093 data->temp_min[chan] =
1094 adm1031_read_value(client,
1095 ADM1031_REG_TEMP_MIN(chan));
1096 data->temp_max[chan] =
1097 adm1031_read_value(client,
1098 ADM1031_REG_TEMP_MAX(chan));
1099 data->temp_crit[chan] =
1100 adm1031_read_value(client,
1101 ADM1031_REG_TEMP_CRIT(chan));
1102 data->auto_temp[chan] =
1103 adm1031_read_value(client,
1104 ADM1031_REG_AUTO_TEMP(chan));
1108 data->conf1 = adm1031_read_value(client, ADM1031_REG_CONF1);
1109 data->conf2 = adm1031_read_value(client, ADM1031_REG_CONF2);
1111 data->alarm = adm1031_read_value(client, ADM1031_REG_STATUS(0))
1112 | (adm1031_read_value(client, ADM1031_REG_STATUS(1)) << 8);
1113 if (data->chip_type == adm1030)
1114 data->alarm &= 0xc0ff;
1116 for (chan = 0; chan < (data->chip_type == adm1030 ? 1 : 2);
1118 data->fan_div[chan] =
1119 adm1031_read_value(client,
1120 ADM1031_REG_FAN_DIV(chan));
1121 data->fan_min[chan] =
1122 adm1031_read_value(client,
1123 ADM1031_REG_FAN_MIN(chan));
1125 adm1031_read_value(client,
1126 ADM1031_REG_FAN_SPEED(chan));
1128 (adm1031_read_value(client,
1129 ADM1031_REG_PWM) >> (4 * chan)) & 0x0f;
1131 data->last_updated = jiffies;
1135 mutex_unlock(&data->update_lock);
1140 module_i2c_driver(adm1031_driver);
1142 MODULE_AUTHOR("Alexandre d'Alton <alex@alexdalton.org>");
1143 MODULE_DESCRIPTION("ADM1031/ADM1030 driver");
1144 MODULE_LICENSE("GPL");