2 amc6821.c - Part of lm_sensors, Linux kernel modules for hardware
4 Copyright (C) 2009 T. Mertelj <tomaz.mertelj@guest.arnes.si>
7 Copyright (C) 2007 Hans J. Koch <hjk@hansjkoch.de>
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.
25 #include <linux/kernel.h> /* Needed for KERN_INFO */
26 #include <linux/module.h>
27 #include <linux/init.h>
28 #include <linux/slab.h>
29 #include <linux/jiffies.h>
30 #include <linux/i2c.h>
31 #include <linux/hwmon.h>
32 #include <linux/hwmon-sysfs.h>
33 #include <linux/err.h>
34 #include <linux/mutex.h>
41 static const unsigned short normal_i2c[] = {0x18, 0x19, 0x1a, 0x2c, 0x2d, 0x2e,
42 0x4c, 0x4d, 0x4e, I2C_CLIENT_END};
50 static int pwminv = 0; /*Inverted PWM output. */
51 module_param(pwminv, int, S_IRUGO);
53 static int init = 1; /*Power-on initialization.*/
54 module_param(init, int, S_IRUGO);
57 enum chips { amc6821 };
59 #define AMC6821_REG_DEV_ID 0x3D
60 #define AMC6821_REG_COMP_ID 0x3E
61 #define AMC6821_REG_CONF1 0x00
62 #define AMC6821_REG_CONF2 0x01
63 #define AMC6821_REG_CONF3 0x3F
64 #define AMC6821_REG_CONF4 0x04
65 #define AMC6821_REG_STAT1 0x02
66 #define AMC6821_REG_STAT2 0x03
67 #define AMC6821_REG_TDATA_LOW 0x08
68 #define AMC6821_REG_TDATA_HI 0x09
69 #define AMC6821_REG_LTEMP_HI 0x0A
70 #define AMC6821_REG_RTEMP_HI 0x0B
71 #define AMC6821_REG_LTEMP_LIMIT_MIN 0x15
72 #define AMC6821_REG_LTEMP_LIMIT_MAX 0x14
73 #define AMC6821_REG_RTEMP_LIMIT_MIN 0x19
74 #define AMC6821_REG_RTEMP_LIMIT_MAX 0x18
75 #define AMC6821_REG_LTEMP_CRIT 0x1B
76 #define AMC6821_REG_RTEMP_CRIT 0x1D
77 #define AMC6821_REG_PSV_TEMP 0x1C
78 #define AMC6821_REG_DCY 0x22
79 #define AMC6821_REG_LTEMP_FAN_CTRL 0x24
80 #define AMC6821_REG_RTEMP_FAN_CTRL 0x25
81 #define AMC6821_REG_DCY_LOW_TEMP 0x21
83 #define AMC6821_REG_TACH_LLIMITL 0x10
84 #define AMC6821_REG_TACH_LLIMITH 0x11
85 #define AMC6821_REG_TACH_HLIMITL 0x12
86 #define AMC6821_REG_TACH_HLIMITH 0x13
88 #define AMC6821_CONF1_START 0x01
89 #define AMC6821_CONF1_FAN_INT_EN 0x02
90 #define AMC6821_CONF1_FANIE 0x04
91 #define AMC6821_CONF1_PWMINV 0x08
92 #define AMC6821_CONF1_FAN_FAULT_EN 0x10
93 #define AMC6821_CONF1_FDRC0 0x20
94 #define AMC6821_CONF1_FDRC1 0x40
95 #define AMC6821_CONF1_THERMOVIE 0x80
97 #define AMC6821_CONF2_PWM_EN 0x01
98 #define AMC6821_CONF2_TACH_MODE 0x02
99 #define AMC6821_CONF2_TACH_EN 0x04
100 #define AMC6821_CONF2_RTFIE 0x08
101 #define AMC6821_CONF2_LTOIE 0x10
102 #define AMC6821_CONF2_RTOIE 0x20
103 #define AMC6821_CONF2_PSVIE 0x40
104 #define AMC6821_CONF2_RST 0x80
106 #define AMC6821_CONF3_THERM_FAN_EN 0x80
107 #define AMC6821_CONF3_REV_MASK 0x0F
109 #define AMC6821_CONF4_OVREN 0x10
110 #define AMC6821_CONF4_TACH_FAST 0x20
111 #define AMC6821_CONF4_PSPR 0x40
112 #define AMC6821_CONF4_MODE 0x80
114 #define AMC6821_STAT1_RPM_ALARM 0x01
115 #define AMC6821_STAT1_FANS 0x02
116 #define AMC6821_STAT1_RTH 0x04
117 #define AMC6821_STAT1_RTL 0x08
118 #define AMC6821_STAT1_R_THERM 0x10
119 #define AMC6821_STAT1_RTF 0x20
120 #define AMC6821_STAT1_LTH 0x40
121 #define AMC6821_STAT1_LTL 0x80
123 #define AMC6821_STAT2_RTC 0x08
124 #define AMC6821_STAT2_LTC 0x10
125 #define AMC6821_STAT2_LPSV 0x20
126 #define AMC6821_STAT2_L_THERM 0x40
127 #define AMC6821_STAT2_THERM_IN 0x80
129 enum {IDX_TEMP1_INPUT = 0, IDX_TEMP1_MIN, IDX_TEMP1_MAX,
130 IDX_TEMP1_CRIT, IDX_TEMP2_INPUT, IDX_TEMP2_MIN,
131 IDX_TEMP2_MAX, IDX_TEMP2_CRIT,
134 static const u8 temp_reg[] = {AMC6821_REG_LTEMP_HI,
135 AMC6821_REG_LTEMP_LIMIT_MIN,
136 AMC6821_REG_LTEMP_LIMIT_MAX,
137 AMC6821_REG_LTEMP_CRIT,
138 AMC6821_REG_RTEMP_HI,
139 AMC6821_REG_RTEMP_LIMIT_MIN,
140 AMC6821_REG_RTEMP_LIMIT_MAX,
141 AMC6821_REG_RTEMP_CRIT, };
143 enum {IDX_FAN1_INPUT = 0, IDX_FAN1_MIN, IDX_FAN1_MAX,
146 static const u8 fan_reg_low[] = {AMC6821_REG_TDATA_LOW,
147 AMC6821_REG_TACH_LLIMITL,
148 AMC6821_REG_TACH_HLIMITL, };
151 static const u8 fan_reg_hi[] = {AMC6821_REG_TDATA_HI,
152 AMC6821_REG_TACH_LLIMITH,
153 AMC6821_REG_TACH_HLIMITH, };
155 static int amc6821_probe(
156 struct i2c_client *client,
157 const struct i2c_device_id *id);
158 static int amc6821_detect(
159 struct i2c_client *client,
160 struct i2c_board_info *info);
161 static int amc6821_init_client(struct i2c_client *client);
162 static int amc6821_remove(struct i2c_client *client);
163 static struct amc6821_data *amc6821_update_device(struct device *dev);
166 * Driver data (common to all clients)
169 static const struct i2c_device_id amc6821_id[] = {
170 { "amc6821", amc6821 },
174 MODULE_DEVICE_TABLE(i2c, amc6821_id);
176 static struct i2c_driver amc6821_driver = {
177 .class = I2C_CLASS_HWMON,
181 .probe = amc6821_probe,
182 .remove = amc6821_remove,
183 .id_table = amc6821_id,
184 .detect = amc6821_detect,
185 .address_list = normal_i2c,
190 * Client data (each client gets its own)
193 struct amc6821_data {
194 struct device *hwmon_dev;
195 struct mutex update_lock;
196 char valid; /* zero until following fields are valid */
197 unsigned long last_updated; /* in jiffies */
199 /* register values */
200 int temp[TEMP_IDX_LEN];
202 u16 fan[FAN1_IDX_LEN];
206 u8 temp1_auto_point_temp[3];
207 u8 temp2_auto_point_temp[3];
208 u8 pwm1_auto_point_pwm[3];
210 u8 pwm1_auto_channels_temp;
217 static ssize_t get_temp(
219 struct device_attribute *devattr,
222 struct amc6821_data *data = amc6821_update_device(dev);
223 int ix = to_sensor_dev_attr(devattr)->index;
225 return sprintf(buf, "%d\n", data->temp[ix] * 1000);
230 static ssize_t set_temp(
232 struct device_attribute *attr,
236 struct i2c_client *client = to_i2c_client(dev);
237 struct amc6821_data *data = i2c_get_clientdata(client);
238 int ix = to_sensor_dev_attr(attr)->index;
241 int ret = strict_strtol(buf, 10, &val);
244 val = SENSORS_LIMIT(val / 1000, -128, 127);
246 mutex_lock(&data->update_lock);
247 data->temp[ix] = val;
248 if (i2c_smbus_write_byte_data(client, temp_reg[ix], data->temp[ix])) {
249 dev_err(&client->dev, "Register write error, aborting.\n");
252 mutex_unlock(&data->update_lock);
259 static ssize_t get_temp_alarm(
261 struct device_attribute *devattr,
264 struct amc6821_data *data = amc6821_update_device(dev);
265 int ix = to_sensor_dev_attr(devattr)->index;
270 flag = data->stat1 & AMC6821_STAT1_LTL;
273 flag = data->stat1 & AMC6821_STAT1_LTH;
276 flag = data->stat2 & AMC6821_STAT2_LTC;
279 flag = data->stat1 & AMC6821_STAT1_RTL;
282 flag = data->stat1 & AMC6821_STAT1_RTH;
285 flag = data->stat2 & AMC6821_STAT2_RTC;
288 dev_dbg(dev, "Unknown attr->index (%d).\n", ix);
292 return sprintf(buf, "1");
294 return sprintf(buf, "0");
300 static ssize_t get_temp2_fault(
302 struct device_attribute *devattr,
305 struct amc6821_data *data = amc6821_update_device(dev);
306 if (data->stat1 & AMC6821_STAT1_RTF)
307 return sprintf(buf, "1");
309 return sprintf(buf, "0");
312 static ssize_t get_pwm1(
314 struct device_attribute *devattr,
317 struct amc6821_data *data = amc6821_update_device(dev);
318 return sprintf(buf, "%d\n", data->pwm1);
321 static ssize_t set_pwm1(
323 struct device_attribute *devattr,
327 struct i2c_client *client = to_i2c_client(dev);
328 struct amc6821_data *data = i2c_get_clientdata(client);
330 int ret = strict_strtol(buf, 10, &val);
334 mutex_lock(&data->update_lock);
335 data->pwm1 = SENSORS_LIMIT(val , 0, 255);
336 i2c_smbus_write_byte_data(client, AMC6821_REG_DCY, data->pwm1);
337 mutex_unlock(&data->update_lock);
341 static ssize_t get_pwm1_enable(
343 struct device_attribute *devattr,
346 struct amc6821_data *data = amc6821_update_device(dev);
347 return sprintf(buf, "%d\n", data->pwm1_enable);
350 static ssize_t set_pwm1_enable(
352 struct device_attribute *attr,
356 struct i2c_client *client = to_i2c_client(dev);
357 struct amc6821_data *data = i2c_get_clientdata(client);
359 int config = strict_strtol(buf, 10, &val);
363 config = i2c_smbus_read_byte_data(client, AMC6821_REG_CONF1);
365 dev_err(&client->dev,
366 "Error reading configuration register, aborting.\n");
372 config &= ~AMC6821_CONF1_FDRC0;
373 config &= ~AMC6821_CONF1_FDRC1;
376 config &= ~AMC6821_CONF1_FDRC0;
377 config |= AMC6821_CONF1_FDRC1;
380 config |= AMC6821_CONF1_FDRC0;
381 config |= AMC6821_CONF1_FDRC1;
386 mutex_lock(&data->update_lock);
387 if (i2c_smbus_write_byte_data(client, AMC6821_REG_CONF1, config)) {
388 dev_err(&client->dev,
389 "Configuration register write error, aborting.\n");
392 mutex_unlock(&data->update_lock);
397 static ssize_t get_pwm1_auto_channels_temp(
399 struct device_attribute *devattr,
402 struct amc6821_data *data = amc6821_update_device(dev);
403 return sprintf(buf, "%d\n", data->pwm1_auto_channels_temp);
407 static ssize_t get_temp_auto_point_temp(
409 struct device_attribute *devattr,
412 int ix = to_sensor_dev_attr_2(devattr)->index;
413 int nr = to_sensor_dev_attr_2(devattr)->nr;
414 struct amc6821_data *data = amc6821_update_device(dev);
417 return sprintf(buf, "%d\n",
418 data->temp1_auto_point_temp[ix] * 1000);
421 return sprintf(buf, "%d\n",
422 data->temp2_auto_point_temp[ix] * 1000);
425 dev_dbg(dev, "Unknown attr->nr (%d).\n", nr);
431 static ssize_t get_pwm1_auto_point_pwm(
433 struct device_attribute *devattr,
436 int ix = to_sensor_dev_attr(devattr)->index;
437 struct amc6821_data *data = amc6821_update_device(dev);
438 return sprintf(buf, "%d\n", data->pwm1_auto_point_pwm[ix]);
442 static inline ssize_t set_slope_register(struct i2c_client *client,
450 dt = ptemp[2]-ptemp[1];
451 for (tmp = 4; tmp > 0; tmp--) {
452 if (dt * (0x20 >> tmp) >= dpwm)
455 tmp |= (ptemp[1] & 0x7C) << 1;
456 if (i2c_smbus_write_byte_data(client,
458 dev_err(&client->dev, "Register write error, aborting.\n");
466 static ssize_t set_temp_auto_point_temp(
468 struct device_attribute *attr,
472 struct i2c_client *client = to_i2c_client(dev);
473 struct amc6821_data *data = amc6821_update_device(dev);
474 int ix = to_sensor_dev_attr_2(attr)->index;
475 int nr = to_sensor_dev_attr_2(attr)->nr;
480 int ret = strict_strtol(buf, 10, &val);
486 ptemp = data->temp1_auto_point_temp;
487 reg = AMC6821_REG_LTEMP_FAN_CTRL;
490 ptemp = data->temp2_auto_point_temp;
491 reg = AMC6821_REG_RTEMP_FAN_CTRL;
494 dev_dbg(dev, "Unknown attr->nr (%d).\n", nr);
499 mutex_lock(&data->update_lock);
502 ptemp[0] = SENSORS_LIMIT(val / 1000, 0,
503 data->temp1_auto_point_temp[1]);
504 ptemp[0] = SENSORS_LIMIT(ptemp[0], 0,
505 data->temp2_auto_point_temp[1]);
506 ptemp[0] = SENSORS_LIMIT(ptemp[0], 0, 63);
507 if (i2c_smbus_write_byte_data(
509 AMC6821_REG_PSV_TEMP,
511 dev_err(&client->dev,
512 "Register write error, aborting.\n");
518 ptemp[1] = SENSORS_LIMIT(
520 (ptemp[0] & 0x7C) + 4,
523 ptemp[2] = SENSORS_LIMIT(
524 ptemp[2], ptemp[1] + 1,
528 ptemp[2] = SENSORS_LIMIT(
534 dev_dbg(dev, "Unknown attr->index (%d).\n", ix);
538 dpwm = data->pwm1_auto_point_pwm[2] - data->pwm1_auto_point_pwm[1];
539 if (set_slope_register(client, reg, dpwm, ptemp))
543 mutex_unlock(&data->update_lock);
549 static ssize_t set_pwm1_auto_point_pwm(
551 struct device_attribute *attr,
555 struct i2c_client *client = to_i2c_client(dev);
556 struct amc6821_data *data = i2c_get_clientdata(client);
559 int ret = strict_strtol(buf, 10, &val);
563 mutex_lock(&data->update_lock);
564 data->pwm1_auto_point_pwm[1] = SENSORS_LIMIT(val, 0, 254);
565 if (i2c_smbus_write_byte_data(client, AMC6821_REG_DCY_LOW_TEMP,
566 data->pwm1_auto_point_pwm[1])) {
567 dev_err(&client->dev, "Register write error, aborting.\n");
571 dpwm = data->pwm1_auto_point_pwm[2] - data->pwm1_auto_point_pwm[1];
572 if (set_slope_register(client, AMC6821_REG_LTEMP_FAN_CTRL, dpwm,
573 data->temp1_auto_point_temp)) {
577 if (set_slope_register(client, AMC6821_REG_RTEMP_FAN_CTRL, dpwm,
578 data->temp2_auto_point_temp)) {
585 mutex_unlock(&data->update_lock);
589 static ssize_t get_fan(
591 struct device_attribute *devattr,
594 struct amc6821_data *data = amc6821_update_device(dev);
595 int ix = to_sensor_dev_attr(devattr)->index;
596 if (0 == data->fan[ix])
597 return sprintf(buf, "0");
598 return sprintf(buf, "%d\n", (int)(6000000 / data->fan[ix]));
603 static ssize_t get_fan1_fault(
605 struct device_attribute *devattr,
608 struct amc6821_data *data = amc6821_update_device(dev);
609 if (data->stat1 & AMC6821_STAT1_FANS)
610 return sprintf(buf, "1");
612 return sprintf(buf, "0");
617 static ssize_t set_fan(
619 struct device_attribute *attr,
620 const char *buf, size_t count)
622 struct i2c_client *client = to_i2c_client(dev);
623 struct amc6821_data *data = i2c_get_clientdata(client);
625 int ix = to_sensor_dev_attr(attr)->index;
626 int ret = strict_strtol(buf, 10, &val);
629 val = 1 > val ? 0xFFFF : 6000000/val;
631 mutex_lock(&data->update_lock);
632 data->fan[ix] = (u16) SENSORS_LIMIT(val, 1, 0xFFFF);
633 if (i2c_smbus_write_byte_data(client, fan_reg_low[ix],
634 data->fan[ix] & 0xFF)) {
635 dev_err(&client->dev, "Register write error, aborting.\n");
639 if (i2c_smbus_write_byte_data(client,
640 fan_reg_hi[ix], data->fan[ix] >> 8)) {
641 dev_err(&client->dev, "Register write error, aborting.\n");
645 mutex_unlock(&data->update_lock);
651 static ssize_t get_fan1_div(
653 struct device_attribute *devattr,
656 struct amc6821_data *data = amc6821_update_device(dev);
657 return sprintf(buf, "%d\n", data->fan1_div);
660 static ssize_t set_fan1_div(
662 struct device_attribute *attr,
663 const char *buf, size_t count)
665 struct i2c_client *client = to_i2c_client(dev);
666 struct amc6821_data *data = i2c_get_clientdata(client);
668 int config = strict_strtol(buf, 10, &val);
672 config = i2c_smbus_read_byte_data(client, AMC6821_REG_CONF4);
674 dev_err(&client->dev,
675 "Error reading configuration register, aborting.\n");
678 mutex_lock(&data->update_lock);
681 config &= ~AMC6821_CONF4_PSPR;
685 config |= AMC6821_CONF4_PSPR;
692 if (i2c_smbus_write_byte_data(client, AMC6821_REG_CONF4, config)) {
693 dev_err(&client->dev,
694 "Configuration register write error, aborting.\n");
698 mutex_unlock(&data->update_lock);
704 static SENSOR_DEVICE_ATTR(temp1_input, S_IRUGO,
705 get_temp, NULL, IDX_TEMP1_INPUT);
706 static SENSOR_DEVICE_ATTR(temp1_min, S_IRUGO | S_IWUSR, get_temp,
707 set_temp, IDX_TEMP1_MIN);
708 static SENSOR_DEVICE_ATTR(temp1_max, S_IRUGO | S_IWUSR, get_temp,
709 set_temp, IDX_TEMP1_MAX);
710 static SENSOR_DEVICE_ATTR(temp1_crit, S_IRUGO | S_IWUSR, get_temp,
711 set_temp, IDX_TEMP1_CRIT);
712 static SENSOR_DEVICE_ATTR(temp1_min_alarm, S_IRUGO,
713 get_temp_alarm, NULL, IDX_TEMP1_MIN);
714 static SENSOR_DEVICE_ATTR(temp1_max_alarm, S_IRUGO,
715 get_temp_alarm, NULL, IDX_TEMP1_MAX);
716 static SENSOR_DEVICE_ATTR(temp1_crit_alarm, S_IRUGO,
717 get_temp_alarm, NULL, IDX_TEMP1_CRIT);
718 static SENSOR_DEVICE_ATTR(temp2_input, S_IRUGO | S_IWUSR,
719 get_temp, NULL, IDX_TEMP2_INPUT);
720 static SENSOR_DEVICE_ATTR(temp2_min, S_IRUGO | S_IWUSR, get_temp,
721 set_temp, IDX_TEMP2_MIN);
722 static SENSOR_DEVICE_ATTR(temp2_max, S_IRUGO | S_IWUSR, get_temp,
723 set_temp, IDX_TEMP2_MAX);
724 static SENSOR_DEVICE_ATTR(temp2_crit, S_IRUGO | S_IWUSR, get_temp,
725 set_temp, IDX_TEMP2_CRIT);
726 static SENSOR_DEVICE_ATTR(temp2_fault, S_IRUGO,
727 get_temp2_fault, NULL, 0);
728 static SENSOR_DEVICE_ATTR(temp2_min_alarm, S_IRUGO,
729 get_temp_alarm, NULL, IDX_TEMP2_MIN);
730 static SENSOR_DEVICE_ATTR(temp2_max_alarm, S_IRUGO,
731 get_temp_alarm, NULL, IDX_TEMP2_MAX);
732 static SENSOR_DEVICE_ATTR(temp2_crit_alarm, S_IRUGO,
733 get_temp_alarm, NULL, IDX_TEMP2_CRIT);
734 static SENSOR_DEVICE_ATTR(fan1_input, S_IRUGO, get_fan, NULL, IDX_FAN1_INPUT);
735 static SENSOR_DEVICE_ATTR(fan1_min, S_IRUGO | S_IWUSR,
736 get_fan, set_fan, IDX_FAN1_MIN);
737 static SENSOR_DEVICE_ATTR(fan1_max, S_IRUGO | S_IWUSR,
738 get_fan, set_fan, IDX_FAN1_MAX);
739 static SENSOR_DEVICE_ATTR(fan1_fault, S_IRUGO, get_fan1_fault, NULL, 0);
740 static SENSOR_DEVICE_ATTR(fan1_div, S_IRUGO | S_IWUSR,
741 get_fan1_div, set_fan1_div, 0);
743 static SENSOR_DEVICE_ATTR(pwm1, S_IWUSR | S_IRUGO, get_pwm1, set_pwm1, 0);
744 static SENSOR_DEVICE_ATTR(pwm1_enable, S_IWUSR | S_IRUGO,
745 get_pwm1_enable, set_pwm1_enable, 0);
746 static SENSOR_DEVICE_ATTR(pwm1_auto_point1_pwm, S_IRUGO,
747 get_pwm1_auto_point_pwm, NULL, 0);
748 static SENSOR_DEVICE_ATTR(pwm1_auto_point2_pwm, S_IWUSR | S_IRUGO,
749 get_pwm1_auto_point_pwm, set_pwm1_auto_point_pwm, 1);
750 static SENSOR_DEVICE_ATTR(pwm1_auto_point3_pwm, S_IRUGO,
751 get_pwm1_auto_point_pwm, NULL, 2);
752 static SENSOR_DEVICE_ATTR(pwm1_auto_channels_temp, S_IRUGO,
753 get_pwm1_auto_channels_temp, NULL, 0);
754 static SENSOR_DEVICE_ATTR_2(temp1_auto_point1_temp, S_IRUGO,
755 get_temp_auto_point_temp, NULL, 1, 0);
756 static SENSOR_DEVICE_ATTR_2(temp1_auto_point2_temp, S_IWUSR | S_IRUGO,
757 get_temp_auto_point_temp, set_temp_auto_point_temp, 1, 1);
758 static SENSOR_DEVICE_ATTR_2(temp1_auto_point3_temp, S_IWUSR | S_IRUGO,
759 get_temp_auto_point_temp, set_temp_auto_point_temp, 1, 2);
761 static SENSOR_DEVICE_ATTR_2(temp2_auto_point1_temp, S_IWUSR | S_IRUGO,
762 get_temp_auto_point_temp, set_temp_auto_point_temp, 2, 0);
763 static SENSOR_DEVICE_ATTR_2(temp2_auto_point2_temp, S_IWUSR | S_IRUGO,
764 get_temp_auto_point_temp, set_temp_auto_point_temp, 2, 1);
765 static SENSOR_DEVICE_ATTR_2(temp2_auto_point3_temp, S_IWUSR | S_IRUGO,
766 get_temp_auto_point_temp, set_temp_auto_point_temp, 2, 2);
770 static struct attribute *amc6821_attrs[] = {
771 &sensor_dev_attr_temp1_input.dev_attr.attr,
772 &sensor_dev_attr_temp1_min.dev_attr.attr,
773 &sensor_dev_attr_temp1_max.dev_attr.attr,
774 &sensor_dev_attr_temp1_crit.dev_attr.attr,
775 &sensor_dev_attr_temp1_min_alarm.dev_attr.attr,
776 &sensor_dev_attr_temp1_max_alarm.dev_attr.attr,
777 &sensor_dev_attr_temp1_crit_alarm.dev_attr.attr,
778 &sensor_dev_attr_temp2_input.dev_attr.attr,
779 &sensor_dev_attr_temp2_min.dev_attr.attr,
780 &sensor_dev_attr_temp2_max.dev_attr.attr,
781 &sensor_dev_attr_temp2_crit.dev_attr.attr,
782 &sensor_dev_attr_temp2_min_alarm.dev_attr.attr,
783 &sensor_dev_attr_temp2_max_alarm.dev_attr.attr,
784 &sensor_dev_attr_temp2_crit_alarm.dev_attr.attr,
785 &sensor_dev_attr_temp2_fault.dev_attr.attr,
786 &sensor_dev_attr_fan1_input.dev_attr.attr,
787 &sensor_dev_attr_fan1_min.dev_attr.attr,
788 &sensor_dev_attr_fan1_max.dev_attr.attr,
789 &sensor_dev_attr_fan1_fault.dev_attr.attr,
790 &sensor_dev_attr_fan1_div.dev_attr.attr,
791 &sensor_dev_attr_pwm1.dev_attr.attr,
792 &sensor_dev_attr_pwm1_enable.dev_attr.attr,
793 &sensor_dev_attr_pwm1_auto_channels_temp.dev_attr.attr,
794 &sensor_dev_attr_pwm1_auto_point1_pwm.dev_attr.attr,
795 &sensor_dev_attr_pwm1_auto_point2_pwm.dev_attr.attr,
796 &sensor_dev_attr_pwm1_auto_point3_pwm.dev_attr.attr,
797 &sensor_dev_attr_temp1_auto_point1_temp.dev_attr.attr,
798 &sensor_dev_attr_temp1_auto_point2_temp.dev_attr.attr,
799 &sensor_dev_attr_temp1_auto_point3_temp.dev_attr.attr,
800 &sensor_dev_attr_temp2_auto_point1_temp.dev_attr.attr,
801 &sensor_dev_attr_temp2_auto_point2_temp.dev_attr.attr,
802 &sensor_dev_attr_temp2_auto_point3_temp.dev_attr.attr,
806 static struct attribute_group amc6821_attr_grp = {
807 .attrs = amc6821_attrs,
812 /* Return 0 if detection is successful, -ENODEV otherwise */
813 static int amc6821_detect(
814 struct i2c_client *client,
815 struct i2c_board_info *info)
817 struct i2c_adapter *adapter = client->adapter;
818 int address = client->addr;
821 dev_dbg(&adapter->dev, "amc6821_detect called.\n");
823 if (!i2c_check_functionality(adapter, I2C_FUNC_SMBUS_BYTE_DATA)) {
824 dev_dbg(&adapter->dev,
825 "amc6821: I2C bus doesn't support byte mode, "
830 dev_id = i2c_smbus_read_byte_data(client, AMC6821_REG_DEV_ID);
831 comp_id = i2c_smbus_read_byte_data(client, AMC6821_REG_COMP_ID);
832 if (dev_id != 0x21 || comp_id != 0x49) {
833 dev_dbg(&adapter->dev,
834 "amc6821: detection failed at 0x%02x.\n",
839 /* Bit 7 of the address register is ignored, so we can check the
840 ID registers again */
841 dev_id = i2c_smbus_read_byte_data(client, 0x80 | AMC6821_REG_DEV_ID);
842 comp_id = i2c_smbus_read_byte_data(client, 0x80 | AMC6821_REG_COMP_ID);
843 if (dev_id != 0x21 || comp_id != 0x49) {
844 dev_dbg(&adapter->dev,
845 "amc6821: detection failed at 0x%02x.\n",
850 dev_info(&adapter->dev, "amc6821: chip found at 0x%02x.\n", address);
851 strlcpy(info->type, "amc6821", I2C_NAME_SIZE);
856 static int amc6821_probe(
857 struct i2c_client *client,
858 const struct i2c_device_id *id)
860 struct amc6821_data *data;
863 data = kzalloc(sizeof(struct amc6821_data), GFP_KERNEL);
865 dev_err(&client->dev, "out of memory.\n");
870 i2c_set_clientdata(client, data);
871 mutex_init(&data->update_lock);
874 * Initialize the amc6821 chip
876 err = amc6821_init_client(client);
880 err = sysfs_create_group(&client->dev.kobj, &amc6821_attr_grp);
884 data->hwmon_dev = hwmon_device_register(&client->dev);
885 if (!IS_ERR(data->hwmon_dev))
888 err = PTR_ERR(data->hwmon_dev);
889 dev_err(&client->dev, "error registering hwmon device.\n");
890 sysfs_remove_group(&client->dev.kobj, &amc6821_attr_grp);
896 static int amc6821_remove(struct i2c_client *client)
898 struct amc6821_data *data = i2c_get_clientdata(client);
900 hwmon_device_unregister(data->hwmon_dev);
901 sysfs_remove_group(&client->dev.kobj, &amc6821_attr_grp);
909 static int amc6821_init_client(struct i2c_client *client)
915 config = i2c_smbus_read_byte_data(client, AMC6821_REG_CONF4);
918 dev_err(&client->dev,
919 "Error reading configuration register, aborting.\n");
923 config |= AMC6821_CONF4_MODE;
925 if (i2c_smbus_write_byte_data(client, AMC6821_REG_CONF4,
927 dev_err(&client->dev,
928 "Configuration register write error, aborting.\n");
932 config = i2c_smbus_read_byte_data(client, AMC6821_REG_CONF3);
935 dev_err(&client->dev,
936 "Error reading configuration register, aborting.\n");
940 dev_info(&client->dev, "Revision %d\n", config & 0x0f);
942 config &= ~AMC6821_CONF3_THERM_FAN_EN;
944 if (i2c_smbus_write_byte_data(client, AMC6821_REG_CONF3,
946 dev_err(&client->dev,
947 "Configuration register write error, aborting.\n");
951 config = i2c_smbus_read_byte_data(client, AMC6821_REG_CONF2);
954 dev_err(&client->dev,
955 "Error reading configuration register, aborting.\n");
959 config &= ~AMC6821_CONF2_RTFIE;
960 config &= ~AMC6821_CONF2_LTOIE;
961 config &= ~AMC6821_CONF2_RTOIE;
962 if (i2c_smbus_write_byte_data(client,
963 AMC6821_REG_CONF2, config)) {
964 dev_err(&client->dev,
965 "Configuration register write error, aborting.\n");
969 config = i2c_smbus_read_byte_data(client, AMC6821_REG_CONF1);
972 dev_err(&client->dev,
973 "Error reading configuration register, aborting.\n");
977 config &= ~AMC6821_CONF1_THERMOVIE;
978 config &= ~AMC6821_CONF1_FANIE;
979 config |= AMC6821_CONF1_START;
981 config |= AMC6821_CONF1_PWMINV;
983 config &= ~AMC6821_CONF1_PWMINV;
985 if (i2c_smbus_write_byte_data(
986 client, AMC6821_REG_CONF1, config)) {
987 dev_err(&client->dev,
988 "Configuration register write error, aborting.\n");
996 static struct amc6821_data *amc6821_update_device(struct device *dev)
998 struct i2c_client *client = to_i2c_client(dev);
999 struct amc6821_data *data = i2c_get_clientdata(client);
1004 mutex_lock(&data->update_lock);
1006 if (time_after(jiffies, data->last_updated + timeout) ||
1009 for (i = 0; i < TEMP_IDX_LEN; i++)
1010 data->temp[i] = i2c_smbus_read_byte_data(client,
1013 data->stat1 = i2c_smbus_read_byte_data(client,
1015 data->stat2 = i2c_smbus_read_byte_data(client,
1018 data->pwm1 = i2c_smbus_read_byte_data(client,
1020 for (i = 0; i < FAN1_IDX_LEN; i++) {
1021 data->fan[i] = i2c_smbus_read_byte_data(
1024 data->fan[i] += i2c_smbus_read_byte_data(
1026 fan_reg_hi[i]) << 8;
1028 data->fan1_div = i2c_smbus_read_byte_data(client,
1030 data->fan1_div = data->fan1_div & AMC6821_CONF4_PSPR ? 4 : 2;
1032 data->pwm1_auto_point_pwm[0] = 0;
1033 data->pwm1_auto_point_pwm[2] = 255;
1034 data->pwm1_auto_point_pwm[1] = i2c_smbus_read_byte_data(client,
1035 AMC6821_REG_DCY_LOW_TEMP);
1037 data->temp1_auto_point_temp[0] =
1038 i2c_smbus_read_byte_data(client,
1039 AMC6821_REG_PSV_TEMP);
1040 data->temp2_auto_point_temp[0] =
1041 data->temp1_auto_point_temp[0];
1042 reg = i2c_smbus_read_byte_data(client,
1043 AMC6821_REG_LTEMP_FAN_CTRL);
1044 data->temp1_auto_point_temp[1] = (reg & 0xF8) >> 1;
1048 data->temp1_auto_point_temp[2] =
1049 data->temp1_auto_point_temp[1] +
1050 (data->pwm1_auto_point_pwm[2] -
1051 data->pwm1_auto_point_pwm[1]) / reg;
1053 data->temp1_auto_point_temp[2] = 255;
1055 reg = i2c_smbus_read_byte_data(client,
1056 AMC6821_REG_RTEMP_FAN_CTRL);
1057 data->temp2_auto_point_temp[1] = (reg & 0xF8) >> 1;
1061 data->temp2_auto_point_temp[2] =
1062 data->temp2_auto_point_temp[1] +
1063 (data->pwm1_auto_point_pwm[2] -
1064 data->pwm1_auto_point_pwm[1]) / reg;
1066 data->temp2_auto_point_temp[2] = 255;
1068 reg = i2c_smbus_read_byte_data(client, AMC6821_REG_CONF1);
1069 reg = (reg >> 5) & 0x3;
1071 case 0: /*open loop: software sets pwm1*/
1072 data->pwm1_auto_channels_temp = 0;
1073 data->pwm1_enable = 1;
1075 case 2: /*closed loop: remote T (temp2)*/
1076 data->pwm1_auto_channels_temp = 2;
1077 data->pwm1_enable = 2;
1079 case 3: /*closed loop: local and remote T (temp2)*/
1080 data->pwm1_auto_channels_temp = 3;
1081 data->pwm1_enable = 3;
1083 case 1: /*semi-open loop: software sets rpm, chip controls pwm1,
1084 *currently not implemented
1086 data->pwm1_auto_channels_temp = 0;
1087 data->pwm1_enable = 0;
1091 data->last_updated = jiffies;
1094 mutex_unlock(&data->update_lock);
1099 static int __init amc6821_init(void)
1101 return i2c_add_driver(&amc6821_driver);
1104 static void __exit amc6821_exit(void)
1106 i2c_del_driver(&amc6821_driver);
1109 module_init(amc6821_init);
1110 module_exit(amc6821_exit);
1113 MODULE_LICENSE("GPL");
1114 MODULE_AUTHOR("T. Mertelj <tomaz.mertelj@guest.arnes.si>");
1115 MODULE_DESCRIPTION("Texas Instruments amc6821 hwmon driver");