2 * gl520sm.c - Part of lm_sensors, Linux kernel modules for hardware
4 * Copyright (c) 1998, 1999 Frodo Looijaard <frodol@dds.nl>,
5 * Kyösti Mälkki <kmalkki@cc.hut.fi>
6 * Copyright (c) 2005 Maarten Deprez <maartendeprez@users.sourceforge.net>
8 * This program is free software; you can redistribute it and/or modify
9 * it under the terms of the GNU General Public License as published by
10 * the Free Software Foundation; either version 2 of the License, or
11 * (at your option) any later version.
13 * This program is distributed in the hope that it will be useful,
14 * but WITHOUT ANY WARRANTY; without even the implied warranty of
15 * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
16 * GNU General Public License for more details.
18 * You should have received a copy of the GNU General Public License
19 * along with this program; if not, write to the Free Software
20 * 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/hwmon-vid.h>
32 #include <linux/err.h>
33 #include <linux/mutex.h>
34 #include <linux/sysfs.h>
36 /* Type of the extra sensor */
37 static unsigned short extra_sensor_type;
38 module_param(extra_sensor_type, ushort, 0);
39 MODULE_PARM_DESC(extra_sensor_type, "Type of extra sensor (0=autodetect, 1=temperature, 2=voltage)");
41 /* Addresses to scan */
42 static const unsigned short normal_i2c[] = { 0x2c, 0x2d, I2C_CLIENT_END };
45 * Many GL520 constants specified below
46 * One of the inputs can be configured as either temp or voltage.
47 * That's why _TEMP2 and _IN4 access the same register
50 /* The GL520 registers */
51 #define GL520_REG_CHIP_ID 0x00
52 #define GL520_REG_REVISION 0x01
53 #define GL520_REG_CONF 0x03
54 #define GL520_REG_MASK 0x11
56 #define GL520_REG_VID_INPUT 0x02
58 static const u8 GL520_REG_IN_INPUT[] = { 0x15, 0x14, 0x13, 0x0d, 0x0e };
59 static const u8 GL520_REG_IN_LIMIT[] = { 0x0c, 0x09, 0x0a, 0x0b };
60 static const u8 GL520_REG_IN_MIN[] = { 0x0c, 0x09, 0x0a, 0x0b, 0x18 };
61 static const u8 GL520_REG_IN_MAX[] = { 0x0c, 0x09, 0x0a, 0x0b, 0x17 };
63 static const u8 GL520_REG_TEMP_INPUT[] = { 0x04, 0x0e };
64 static const u8 GL520_REG_TEMP_MAX[] = { 0x05, 0x17 };
65 static const u8 GL520_REG_TEMP_MAX_HYST[] = { 0x06, 0x18 };
67 #define GL520_REG_FAN_INPUT 0x07
68 #define GL520_REG_FAN_MIN 0x08
69 #define GL520_REG_FAN_DIV 0x0f
70 #define GL520_REG_FAN_OFF GL520_REG_FAN_DIV
72 #define GL520_REG_ALARMS 0x12
73 #define GL520_REG_BEEP_MASK 0x10
74 #define GL520_REG_BEEP_ENABLE GL520_REG_CONF
77 * Function declarations
80 static int gl520_probe(struct i2c_client *client,
81 const struct i2c_device_id *id);
82 static int gl520_detect(struct i2c_client *client, struct i2c_board_info *info);
83 static void gl520_init_client(struct i2c_client *client);
84 static int gl520_remove(struct i2c_client *client);
85 static int gl520_read_value(struct i2c_client *client, u8 reg);
86 static int gl520_write_value(struct i2c_client *client, u8 reg, u16 value);
87 static struct gl520_data *gl520_update_device(struct device *dev);
90 static const struct i2c_device_id gl520_id[] = {
94 MODULE_DEVICE_TABLE(i2c, gl520_id);
96 static struct i2c_driver gl520_driver = {
97 .class = I2C_CLASS_HWMON,
101 .probe = gl520_probe,
102 .remove = gl520_remove,
103 .id_table = gl520_id,
104 .detect = gl520_detect,
105 .address_list = normal_i2c,
110 struct device *hwmon_dev;
111 struct mutex update_lock;
112 char valid; /* zero until the following fields are valid */
113 unsigned long last_updated; /* in jiffies */
117 u8 in_input[5]; /* [0] = VVD */
118 u8 in_min[5]; /* [0] = VDD */
119 u8 in_max[5]; /* [0] = VDD */
138 static ssize_t get_cpu_vid(struct device *dev, struct device_attribute *attr,
141 struct gl520_data *data = gl520_update_device(dev);
142 return sprintf(buf, "%u\n", vid_from_reg(data->vid, data->vrm));
144 static DEVICE_ATTR(cpu0_vid, S_IRUGO, get_cpu_vid, NULL);
146 #define VDD_FROM_REG(val) (((val) * 95 + 2) / 4)
147 #define VDD_TO_REG(val) SENSORS_LIMIT((((val) * 4 + 47) / 95), 0, 255)
149 #define IN_FROM_REG(val) ((val) * 19)
150 #define IN_TO_REG(val) SENSORS_LIMIT((((val) + 9) / 19), 0, 255)
152 static ssize_t get_in_input(struct device *dev, struct device_attribute *attr,
155 int n = to_sensor_dev_attr(attr)->index;
156 struct gl520_data *data = gl520_update_device(dev);
157 u8 r = data->in_input[n];
160 return sprintf(buf, "%d\n", VDD_FROM_REG(r));
162 return sprintf(buf, "%d\n", IN_FROM_REG(r));
165 static ssize_t get_in_min(struct device *dev, struct device_attribute *attr,
168 int n = to_sensor_dev_attr(attr)->index;
169 struct gl520_data *data = gl520_update_device(dev);
170 u8 r = data->in_min[n];
173 return sprintf(buf, "%d\n", VDD_FROM_REG(r));
175 return sprintf(buf, "%d\n", IN_FROM_REG(r));
178 static ssize_t get_in_max(struct device *dev, struct device_attribute *attr,
181 int n = to_sensor_dev_attr(attr)->index;
182 struct gl520_data *data = gl520_update_device(dev);
183 u8 r = data->in_max[n];
186 return sprintf(buf, "%d\n", VDD_FROM_REG(r));
188 return sprintf(buf, "%d\n", IN_FROM_REG(r));
191 static ssize_t set_in_min(struct device *dev, struct device_attribute *attr,
192 const char *buf, size_t count)
194 struct i2c_client *client = to_i2c_client(dev);
195 struct gl520_data *data = i2c_get_clientdata(client);
196 int n = to_sensor_dev_attr(attr)->index;
201 err = kstrtol(buf, 10, &v);
205 mutex_lock(&data->update_lock);
215 gl520_write_value(client, GL520_REG_IN_MIN[n],
216 (gl520_read_value(client, GL520_REG_IN_MIN[n])
219 gl520_write_value(client, GL520_REG_IN_MIN[n], r);
221 mutex_unlock(&data->update_lock);
225 static ssize_t set_in_max(struct device *dev, struct device_attribute *attr,
226 const char *buf, size_t count)
228 struct i2c_client *client = to_i2c_client(dev);
229 struct gl520_data *data = i2c_get_clientdata(client);
230 int n = to_sensor_dev_attr(attr)->index;
235 err = kstrtol(buf, 10, &v);
244 mutex_lock(&data->update_lock);
249 gl520_write_value(client, GL520_REG_IN_MAX[n],
250 (gl520_read_value(client, GL520_REG_IN_MAX[n])
251 & ~0xff00) | (r << 8));
253 gl520_write_value(client, GL520_REG_IN_MAX[n], r);
255 mutex_unlock(&data->update_lock);
259 static SENSOR_DEVICE_ATTR(in0_input, S_IRUGO, get_in_input, NULL, 0);
260 static SENSOR_DEVICE_ATTR(in1_input, S_IRUGO, get_in_input, NULL, 1);
261 static SENSOR_DEVICE_ATTR(in2_input, S_IRUGO, get_in_input, NULL, 2);
262 static SENSOR_DEVICE_ATTR(in3_input, S_IRUGO, get_in_input, NULL, 3);
263 static SENSOR_DEVICE_ATTR(in4_input, S_IRUGO, get_in_input, NULL, 4);
264 static SENSOR_DEVICE_ATTR(in0_min, S_IRUGO | S_IWUSR,
265 get_in_min, set_in_min, 0);
266 static SENSOR_DEVICE_ATTR(in1_min, S_IRUGO | S_IWUSR,
267 get_in_min, set_in_min, 1);
268 static SENSOR_DEVICE_ATTR(in2_min, S_IRUGO | S_IWUSR,
269 get_in_min, set_in_min, 2);
270 static SENSOR_DEVICE_ATTR(in3_min, S_IRUGO | S_IWUSR,
271 get_in_min, set_in_min, 3);
272 static SENSOR_DEVICE_ATTR(in4_min, S_IRUGO | S_IWUSR,
273 get_in_min, set_in_min, 4);
274 static SENSOR_DEVICE_ATTR(in0_max, S_IRUGO | S_IWUSR,
275 get_in_max, set_in_max, 0);
276 static SENSOR_DEVICE_ATTR(in1_max, S_IRUGO | S_IWUSR,
277 get_in_max, set_in_max, 1);
278 static SENSOR_DEVICE_ATTR(in2_max, S_IRUGO | S_IWUSR,
279 get_in_max, set_in_max, 2);
280 static SENSOR_DEVICE_ATTR(in3_max, S_IRUGO | S_IWUSR,
281 get_in_max, set_in_max, 3);
282 static SENSOR_DEVICE_ATTR(in4_max, S_IRUGO | S_IWUSR,
283 get_in_max, set_in_max, 4);
285 #define DIV_FROM_REG(val) (1 << (val))
286 #define FAN_FROM_REG(val, div) ((val) == 0 ? 0 : (480000 / ((val) << (div))))
287 #define FAN_TO_REG(val, div) ((val) <= 0 ? 0 : \
288 SENSORS_LIMIT((480000 + ((val) << ((div)-1))) / ((val) << (div)), 1, \
291 static ssize_t get_fan_input(struct device *dev, struct device_attribute *attr,
294 int n = to_sensor_dev_attr(attr)->index;
295 struct gl520_data *data = gl520_update_device(dev);
297 return sprintf(buf, "%d\n", FAN_FROM_REG(data->fan_input[n],
301 static ssize_t get_fan_min(struct device *dev, struct device_attribute *attr,
304 int n = to_sensor_dev_attr(attr)->index;
305 struct gl520_data *data = gl520_update_device(dev);
307 return sprintf(buf, "%d\n", FAN_FROM_REG(data->fan_min[n],
311 static ssize_t get_fan_div(struct device *dev, struct device_attribute *attr,
314 int n = to_sensor_dev_attr(attr)->index;
315 struct gl520_data *data = gl520_update_device(dev);
317 return sprintf(buf, "%d\n", DIV_FROM_REG(data->fan_div[n]));
320 static ssize_t get_fan_off(struct device *dev, struct device_attribute *attr,
323 struct gl520_data *data = gl520_update_device(dev);
324 return sprintf(buf, "%d\n", data->fan_off);
327 static ssize_t set_fan_min(struct device *dev, struct device_attribute *attr,
328 const char *buf, size_t count)
330 struct i2c_client *client = to_i2c_client(dev);
331 struct gl520_data *data = i2c_get_clientdata(client);
332 int n = to_sensor_dev_attr(attr)->index;
337 err = kstrtoul(buf, 10, &v);
341 mutex_lock(&data->update_lock);
342 r = FAN_TO_REG(v, data->fan_div[n]);
343 data->fan_min[n] = r;
346 gl520_write_value(client, GL520_REG_FAN_MIN,
347 (gl520_read_value(client, GL520_REG_FAN_MIN)
348 & ~0xff00) | (r << 8));
350 gl520_write_value(client, GL520_REG_FAN_MIN,
351 (gl520_read_value(client, GL520_REG_FAN_MIN)
354 data->beep_mask = gl520_read_value(client, GL520_REG_BEEP_MASK);
355 if (data->fan_min[n] == 0)
356 data->alarm_mask &= (n == 0) ? ~0x20 : ~0x40;
358 data->alarm_mask |= (n == 0) ? 0x20 : 0x40;
359 data->beep_mask &= data->alarm_mask;
360 gl520_write_value(client, GL520_REG_BEEP_MASK, data->beep_mask);
362 mutex_unlock(&data->update_lock);
366 static ssize_t set_fan_div(struct device *dev, struct device_attribute *attr,
367 const char *buf, size_t count)
369 struct i2c_client *client = to_i2c_client(dev);
370 struct gl520_data *data = i2c_get_clientdata(client);
371 int n = to_sensor_dev_attr(attr)->index;
376 err = kstrtoul(buf, 10, &v);
394 dev_err(&client->dev,
395 "fan_div value %ld not supported. Choose one of 1, 2, 4 or 8!\n", v);
399 mutex_lock(&data->update_lock);
400 data->fan_div[n] = r;
403 gl520_write_value(client, GL520_REG_FAN_DIV,
404 (gl520_read_value(client, GL520_REG_FAN_DIV)
405 & ~0xc0) | (r << 6));
407 gl520_write_value(client, GL520_REG_FAN_DIV,
408 (gl520_read_value(client, GL520_REG_FAN_DIV)
409 & ~0x30) | (r << 4));
411 mutex_unlock(&data->update_lock);
415 static ssize_t set_fan_off(struct device *dev, struct device_attribute *attr,
416 const char *buf, size_t count)
418 struct i2c_client *client = to_i2c_client(dev);
419 struct gl520_data *data = i2c_get_clientdata(client);
424 err = kstrtoul(buf, 10, &v);
430 mutex_lock(&data->update_lock);
432 gl520_write_value(client, GL520_REG_FAN_OFF,
433 (gl520_read_value(client, GL520_REG_FAN_OFF)
434 & ~0x0c) | (r << 2));
435 mutex_unlock(&data->update_lock);
439 static SENSOR_DEVICE_ATTR(fan1_input, S_IRUGO, get_fan_input, NULL, 0);
440 static SENSOR_DEVICE_ATTR(fan2_input, S_IRUGO, get_fan_input, NULL, 1);
441 static SENSOR_DEVICE_ATTR(fan1_min, S_IRUGO | S_IWUSR,
442 get_fan_min, set_fan_min, 0);
443 static SENSOR_DEVICE_ATTR(fan2_min, S_IRUGO | S_IWUSR,
444 get_fan_min, set_fan_min, 1);
445 static SENSOR_DEVICE_ATTR(fan1_div, S_IRUGO | S_IWUSR,
446 get_fan_div, set_fan_div, 0);
447 static SENSOR_DEVICE_ATTR(fan2_div, S_IRUGO | S_IWUSR,
448 get_fan_div, set_fan_div, 1);
449 static DEVICE_ATTR(fan1_off, S_IRUGO | S_IWUSR,
450 get_fan_off, set_fan_off);
452 #define TEMP_FROM_REG(val) (((val) - 130) * 1000)
453 #define TEMP_TO_REG(val) SENSORS_LIMIT(((((val) < 0 ? \
454 (val) - 500 : (val) + 500) / 1000) + 130), 0, 255)
456 static ssize_t get_temp_input(struct device *dev, struct device_attribute *attr,
459 int n = to_sensor_dev_attr(attr)->index;
460 struct gl520_data *data = gl520_update_device(dev);
462 return sprintf(buf, "%d\n", TEMP_FROM_REG(data->temp_input[n]));
465 static ssize_t get_temp_max(struct device *dev, struct device_attribute *attr,
468 int n = to_sensor_dev_attr(attr)->index;
469 struct gl520_data *data = gl520_update_device(dev);
471 return sprintf(buf, "%d\n", TEMP_FROM_REG(data->temp_max[n]));
474 static ssize_t get_temp_max_hyst(struct device *dev,
475 struct device_attribute *attr, char *buf)
477 int n = to_sensor_dev_attr(attr)->index;
478 struct gl520_data *data = gl520_update_device(dev);
480 return sprintf(buf, "%d\n", TEMP_FROM_REG(data->temp_max_hyst[n]));
483 static ssize_t set_temp_max(struct device *dev, struct device_attribute *attr,
484 const char *buf, size_t count)
486 struct i2c_client *client = to_i2c_client(dev);
487 struct gl520_data *data = i2c_get_clientdata(client);
488 int n = to_sensor_dev_attr(attr)->index;
492 err = kstrtol(buf, 10, &v);
496 mutex_lock(&data->update_lock);
497 data->temp_max[n] = TEMP_TO_REG(v);
498 gl520_write_value(client, GL520_REG_TEMP_MAX[n], data->temp_max[n]);
499 mutex_unlock(&data->update_lock);
503 static ssize_t set_temp_max_hyst(struct device *dev, struct device_attribute
504 *attr, const char *buf, size_t count)
506 struct i2c_client *client = to_i2c_client(dev);
507 struct gl520_data *data = i2c_get_clientdata(client);
508 int n = to_sensor_dev_attr(attr)->index;
512 err = kstrtol(buf, 10, &v);
516 mutex_lock(&data->update_lock);
517 data->temp_max_hyst[n] = TEMP_TO_REG(v);
518 gl520_write_value(client, GL520_REG_TEMP_MAX_HYST[n],
519 data->temp_max_hyst[n]);
520 mutex_unlock(&data->update_lock);
524 static SENSOR_DEVICE_ATTR(temp1_input, S_IRUGO, get_temp_input, NULL, 0);
525 static SENSOR_DEVICE_ATTR(temp2_input, S_IRUGO, get_temp_input, NULL, 1);
526 static SENSOR_DEVICE_ATTR(temp1_max, S_IRUGO | S_IWUSR,
527 get_temp_max, set_temp_max, 0);
528 static SENSOR_DEVICE_ATTR(temp2_max, S_IRUGO | S_IWUSR,
529 get_temp_max, set_temp_max, 1);
530 static SENSOR_DEVICE_ATTR(temp1_max_hyst, S_IRUGO | S_IWUSR,
531 get_temp_max_hyst, set_temp_max_hyst, 0);
532 static SENSOR_DEVICE_ATTR(temp2_max_hyst, S_IRUGO | S_IWUSR,
533 get_temp_max_hyst, set_temp_max_hyst, 1);
535 static ssize_t get_alarms(struct device *dev, struct device_attribute *attr,
538 struct gl520_data *data = gl520_update_device(dev);
539 return sprintf(buf, "%d\n", data->alarms);
542 static ssize_t get_beep_enable(struct device *dev, struct device_attribute
545 struct gl520_data *data = gl520_update_device(dev);
546 return sprintf(buf, "%d\n", data->beep_enable);
549 static ssize_t get_beep_mask(struct device *dev, struct device_attribute *attr,
552 struct gl520_data *data = gl520_update_device(dev);
553 return sprintf(buf, "%d\n", data->beep_mask);
556 static ssize_t set_beep_enable(struct device *dev, struct device_attribute
557 *attr, const char *buf, size_t count)
559 struct i2c_client *client = to_i2c_client(dev);
560 struct gl520_data *data = i2c_get_clientdata(client);
565 err = kstrtoul(buf, 10, &v);
571 mutex_lock(&data->update_lock);
572 data->beep_enable = !r;
573 gl520_write_value(client, GL520_REG_BEEP_ENABLE,
574 (gl520_read_value(client, GL520_REG_BEEP_ENABLE)
575 & ~0x04) | (r << 2));
576 mutex_unlock(&data->update_lock);
580 static ssize_t set_beep_mask(struct device *dev, struct device_attribute *attr,
581 const char *buf, size_t count)
583 struct i2c_client *client = to_i2c_client(dev);
584 struct gl520_data *data = i2c_get_clientdata(client);
588 err = kstrtoul(buf, 10, &r);
592 mutex_lock(&data->update_lock);
593 r &= data->alarm_mask;
595 gl520_write_value(client, GL520_REG_BEEP_MASK, r);
596 mutex_unlock(&data->update_lock);
600 static DEVICE_ATTR(alarms, S_IRUGO, get_alarms, NULL);
601 static DEVICE_ATTR(beep_enable, S_IRUGO | S_IWUSR,
602 get_beep_enable, set_beep_enable);
603 static DEVICE_ATTR(beep_mask, S_IRUGO | S_IWUSR,
604 get_beep_mask, set_beep_mask);
606 static ssize_t get_alarm(struct device *dev, struct device_attribute *attr,
609 int bit_nr = to_sensor_dev_attr(attr)->index;
610 struct gl520_data *data = gl520_update_device(dev);
612 return sprintf(buf, "%d\n", (data->alarms >> bit_nr) & 1);
615 static SENSOR_DEVICE_ATTR(in0_alarm, S_IRUGO, get_alarm, NULL, 0);
616 static SENSOR_DEVICE_ATTR(in1_alarm, S_IRUGO, get_alarm, NULL, 1);
617 static SENSOR_DEVICE_ATTR(in2_alarm, S_IRUGO, get_alarm, NULL, 2);
618 static SENSOR_DEVICE_ATTR(in3_alarm, S_IRUGO, get_alarm, NULL, 3);
619 static SENSOR_DEVICE_ATTR(temp1_alarm, S_IRUGO, get_alarm, NULL, 4);
620 static SENSOR_DEVICE_ATTR(fan1_alarm, S_IRUGO, get_alarm, NULL, 5);
621 static SENSOR_DEVICE_ATTR(fan2_alarm, S_IRUGO, get_alarm, NULL, 6);
622 static SENSOR_DEVICE_ATTR(temp2_alarm, S_IRUGO, get_alarm, NULL, 7);
623 static SENSOR_DEVICE_ATTR(in4_alarm, S_IRUGO, get_alarm, NULL, 7);
625 static ssize_t get_beep(struct device *dev, struct device_attribute *attr,
628 int bitnr = to_sensor_dev_attr(attr)->index;
629 struct gl520_data *data = gl520_update_device(dev);
631 return sprintf(buf, "%d\n", (data->beep_mask >> bitnr) & 1);
634 static ssize_t set_beep(struct device *dev, struct device_attribute *attr,
635 const char *buf, size_t count)
637 struct i2c_client *client = to_i2c_client(dev);
638 struct gl520_data *data = i2c_get_clientdata(client);
639 int bitnr = to_sensor_dev_attr(attr)->index;
644 err = kstrtoul(buf, 10, &bit);
650 mutex_lock(&data->update_lock);
651 data->beep_mask = gl520_read_value(client, GL520_REG_BEEP_MASK);
653 data->beep_mask |= (1 << bitnr);
655 data->beep_mask &= ~(1 << bitnr);
656 gl520_write_value(client, GL520_REG_BEEP_MASK, data->beep_mask);
657 mutex_unlock(&data->update_lock);
661 static SENSOR_DEVICE_ATTR(in0_beep, S_IRUGO | S_IWUSR, get_beep, set_beep, 0);
662 static SENSOR_DEVICE_ATTR(in1_beep, S_IRUGO | S_IWUSR, get_beep, set_beep, 1);
663 static SENSOR_DEVICE_ATTR(in2_beep, S_IRUGO | S_IWUSR, get_beep, set_beep, 2);
664 static SENSOR_DEVICE_ATTR(in3_beep, S_IRUGO | S_IWUSR, get_beep, set_beep, 3);
665 static SENSOR_DEVICE_ATTR(temp1_beep, S_IRUGO | S_IWUSR, get_beep, set_beep, 4);
666 static SENSOR_DEVICE_ATTR(fan1_beep, S_IRUGO | S_IWUSR, get_beep, set_beep, 5);
667 static SENSOR_DEVICE_ATTR(fan2_beep, S_IRUGO | S_IWUSR, get_beep, set_beep, 6);
668 static SENSOR_DEVICE_ATTR(temp2_beep, S_IRUGO | S_IWUSR, get_beep, set_beep, 7);
669 static SENSOR_DEVICE_ATTR(in4_beep, S_IRUGO | S_IWUSR, get_beep, set_beep, 7);
671 static struct attribute *gl520_attributes[] = {
672 &dev_attr_cpu0_vid.attr,
674 &sensor_dev_attr_in0_input.dev_attr.attr,
675 &sensor_dev_attr_in0_min.dev_attr.attr,
676 &sensor_dev_attr_in0_max.dev_attr.attr,
677 &sensor_dev_attr_in0_alarm.dev_attr.attr,
678 &sensor_dev_attr_in0_beep.dev_attr.attr,
679 &sensor_dev_attr_in1_input.dev_attr.attr,
680 &sensor_dev_attr_in1_min.dev_attr.attr,
681 &sensor_dev_attr_in1_max.dev_attr.attr,
682 &sensor_dev_attr_in1_alarm.dev_attr.attr,
683 &sensor_dev_attr_in1_beep.dev_attr.attr,
684 &sensor_dev_attr_in2_input.dev_attr.attr,
685 &sensor_dev_attr_in2_min.dev_attr.attr,
686 &sensor_dev_attr_in2_max.dev_attr.attr,
687 &sensor_dev_attr_in2_alarm.dev_attr.attr,
688 &sensor_dev_attr_in2_beep.dev_attr.attr,
689 &sensor_dev_attr_in3_input.dev_attr.attr,
690 &sensor_dev_attr_in3_min.dev_attr.attr,
691 &sensor_dev_attr_in3_max.dev_attr.attr,
692 &sensor_dev_attr_in3_alarm.dev_attr.attr,
693 &sensor_dev_attr_in3_beep.dev_attr.attr,
695 &sensor_dev_attr_fan1_input.dev_attr.attr,
696 &sensor_dev_attr_fan1_min.dev_attr.attr,
697 &sensor_dev_attr_fan1_div.dev_attr.attr,
698 &sensor_dev_attr_fan1_alarm.dev_attr.attr,
699 &sensor_dev_attr_fan1_beep.dev_attr.attr,
700 &dev_attr_fan1_off.attr,
701 &sensor_dev_attr_fan2_input.dev_attr.attr,
702 &sensor_dev_attr_fan2_min.dev_attr.attr,
703 &sensor_dev_attr_fan2_div.dev_attr.attr,
704 &sensor_dev_attr_fan2_alarm.dev_attr.attr,
705 &sensor_dev_attr_fan2_beep.dev_attr.attr,
707 &sensor_dev_attr_temp1_input.dev_attr.attr,
708 &sensor_dev_attr_temp1_max.dev_attr.attr,
709 &sensor_dev_attr_temp1_max_hyst.dev_attr.attr,
710 &sensor_dev_attr_temp1_alarm.dev_attr.attr,
711 &sensor_dev_attr_temp1_beep.dev_attr.attr,
713 &dev_attr_alarms.attr,
714 &dev_attr_beep_enable.attr,
715 &dev_attr_beep_mask.attr,
719 static const struct attribute_group gl520_group = {
720 .attrs = gl520_attributes,
723 static struct attribute *gl520_attributes_in4[] = {
724 &sensor_dev_attr_in4_input.dev_attr.attr,
725 &sensor_dev_attr_in4_min.dev_attr.attr,
726 &sensor_dev_attr_in4_max.dev_attr.attr,
727 &sensor_dev_attr_in4_alarm.dev_attr.attr,
728 &sensor_dev_attr_in4_beep.dev_attr.attr,
732 static struct attribute *gl520_attributes_temp2[] = {
733 &sensor_dev_attr_temp2_input.dev_attr.attr,
734 &sensor_dev_attr_temp2_max.dev_attr.attr,
735 &sensor_dev_attr_temp2_max_hyst.dev_attr.attr,
736 &sensor_dev_attr_temp2_alarm.dev_attr.attr,
737 &sensor_dev_attr_temp2_beep.dev_attr.attr,
741 static const struct attribute_group gl520_group_in4 = {
742 .attrs = gl520_attributes_in4,
745 static const struct attribute_group gl520_group_temp2 = {
746 .attrs = gl520_attributes_temp2,
754 /* Return 0 if detection is successful, -ENODEV otherwise */
755 static int gl520_detect(struct i2c_client *client, struct i2c_board_info *info)
757 struct i2c_adapter *adapter = client->adapter;
759 if (!i2c_check_functionality(adapter, I2C_FUNC_SMBUS_BYTE_DATA |
760 I2C_FUNC_SMBUS_WORD_DATA))
763 /* Determine the chip type. */
764 if ((gl520_read_value(client, GL520_REG_CHIP_ID) != 0x20) ||
765 ((gl520_read_value(client, GL520_REG_REVISION) & 0x7f) != 0x00) ||
766 ((gl520_read_value(client, GL520_REG_CONF) & 0x80) != 0x00)) {
767 dev_dbg(&client->dev, "Unknown chip type, skipping\n");
771 strlcpy(info->type, "gl520sm", I2C_NAME_SIZE);
776 static int gl520_probe(struct i2c_client *client,
777 const struct i2c_device_id *id)
779 struct gl520_data *data;
782 data = devm_kzalloc(&client->dev, sizeof(struct gl520_data),
787 i2c_set_clientdata(client, data);
788 mutex_init(&data->update_lock);
790 /* Initialize the GL520SM chip */
791 gl520_init_client(client);
793 /* Register sysfs hooks */
794 err = sysfs_create_group(&client->dev.kobj, &gl520_group);
799 err = sysfs_create_group(&client->dev.kobj, &gl520_group_temp2);
801 err = sysfs_create_group(&client->dev.kobj, &gl520_group_in4);
804 goto exit_remove_files;
806 data->hwmon_dev = hwmon_device_register(&client->dev);
807 if (IS_ERR(data->hwmon_dev)) {
808 err = PTR_ERR(data->hwmon_dev);
809 goto exit_remove_files;
815 sysfs_remove_group(&client->dev.kobj, &gl520_group);
816 sysfs_remove_group(&client->dev.kobj, &gl520_group_in4);
817 sysfs_remove_group(&client->dev.kobj, &gl520_group_temp2);
822 /* Called when we have found a new GL520SM. */
823 static void gl520_init_client(struct i2c_client *client)
825 struct gl520_data *data = i2c_get_clientdata(client);
828 conf = oldconf = gl520_read_value(client, GL520_REG_CONF);
830 data->alarm_mask = 0xff;
831 data->vrm = vid_which_vrm();
833 if (extra_sensor_type == 1)
835 else if (extra_sensor_type == 2)
837 data->two_temps = !(conf & 0x10);
839 /* If IRQ# is disabled, we can safely force comparator mode */
843 /* Enable monitoring if needed */
847 gl520_write_value(client, GL520_REG_CONF, conf);
849 gl520_update_device(&(client->dev));
851 if (data->fan_min[0] == 0)
852 data->alarm_mask &= ~0x20;
853 if (data->fan_min[1] == 0)
854 data->alarm_mask &= ~0x40;
856 data->beep_mask &= data->alarm_mask;
857 gl520_write_value(client, GL520_REG_BEEP_MASK, data->beep_mask);
860 static int gl520_remove(struct i2c_client *client)
862 struct gl520_data *data = i2c_get_clientdata(client);
864 hwmon_device_unregister(data->hwmon_dev);
865 sysfs_remove_group(&client->dev.kobj, &gl520_group);
866 sysfs_remove_group(&client->dev.kobj, &gl520_group_in4);
867 sysfs_remove_group(&client->dev.kobj, &gl520_group_temp2);
874 * Registers 0x07 to 0x0c are word-sized, others are byte-sized
875 * GL520 uses a high-byte first convention
877 static int gl520_read_value(struct i2c_client *client, u8 reg)
879 if ((reg >= 0x07) && (reg <= 0x0c))
880 return i2c_smbus_read_word_swapped(client, reg);
882 return i2c_smbus_read_byte_data(client, reg);
885 static int gl520_write_value(struct i2c_client *client, u8 reg, u16 value)
887 if ((reg >= 0x07) && (reg <= 0x0c))
888 return i2c_smbus_write_word_swapped(client, reg, value);
890 return i2c_smbus_write_byte_data(client, reg, value);
894 static struct gl520_data *gl520_update_device(struct device *dev)
896 struct i2c_client *client = to_i2c_client(dev);
897 struct gl520_data *data = i2c_get_clientdata(client);
900 mutex_lock(&data->update_lock);
902 if (time_after(jiffies, data->last_updated + 2 * HZ) || !data->valid) {
904 dev_dbg(&client->dev, "Starting gl520sm update\n");
906 data->alarms = gl520_read_value(client, GL520_REG_ALARMS);
907 data->beep_mask = gl520_read_value(client, GL520_REG_BEEP_MASK);
908 data->vid = gl520_read_value(client,
909 GL520_REG_VID_INPUT) & 0x1f;
911 for (i = 0; i < 4; i++) {
912 data->in_input[i] = gl520_read_value(client,
913 GL520_REG_IN_INPUT[i]);
914 val = gl520_read_value(client, GL520_REG_IN_LIMIT[i]);
915 data->in_min[i] = val & 0xff;
916 data->in_max[i] = (val >> 8) & 0xff;
919 val = gl520_read_value(client, GL520_REG_FAN_INPUT);
920 data->fan_input[0] = (val >> 8) & 0xff;
921 data->fan_input[1] = val & 0xff;
923 val = gl520_read_value(client, GL520_REG_FAN_MIN);
924 data->fan_min[0] = (val >> 8) & 0xff;
925 data->fan_min[1] = val & 0xff;
927 data->temp_input[0] = gl520_read_value(client,
928 GL520_REG_TEMP_INPUT[0]);
929 data->temp_max[0] = gl520_read_value(client,
930 GL520_REG_TEMP_MAX[0]);
931 data->temp_max_hyst[0] = gl520_read_value(client,
932 GL520_REG_TEMP_MAX_HYST[0]);
934 val = gl520_read_value(client, GL520_REG_FAN_DIV);
935 data->fan_div[0] = (val >> 6) & 0x03;
936 data->fan_div[1] = (val >> 4) & 0x03;
937 data->fan_off = (val >> 2) & 0x01;
939 data->alarms &= data->alarm_mask;
941 val = gl520_read_value(client, GL520_REG_CONF);
942 data->beep_enable = !((val >> 2) & 1);
944 /* Temp1 and Vin4 are the same input */
945 if (data->two_temps) {
946 data->temp_input[1] = gl520_read_value(client,
947 GL520_REG_TEMP_INPUT[1]);
948 data->temp_max[1] = gl520_read_value(client,
949 GL520_REG_TEMP_MAX[1]);
950 data->temp_max_hyst[1] = gl520_read_value(client,
951 GL520_REG_TEMP_MAX_HYST[1]);
953 data->in_input[4] = gl520_read_value(client,
954 GL520_REG_IN_INPUT[4]);
955 data->in_min[4] = gl520_read_value(client,
956 GL520_REG_IN_MIN[4]);
957 data->in_max[4] = gl520_read_value(client,
958 GL520_REG_IN_MAX[4]);
961 data->last_updated = jiffies;
965 mutex_unlock(&data->update_lock);
970 module_i2c_driver(gl520_driver);
972 MODULE_AUTHOR("Frodo Looijaard <frodol@dds.nl>, "
973 "Kyösti Mälkki <kmalkki@cc.hut.fi>, "
974 "Maarten Deprez <maartendeprez@users.sourceforge.net>");
975 MODULE_DESCRIPTION("GL520SM driver");
976 MODULE_LICENSE("GPL");