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 unsigned short normal_i2c[] = { 0x2c, 0x2d, I2C_CLIENT_END };
44 /* Insmod parameters */
45 I2C_CLIENT_INSMOD_1(gl520sm);
47 /* Many GL520 constants specified below
48 One of the inputs can be configured as either temp or voltage.
49 That's why _TEMP2 and _IN4 access the same register
52 /* The GL520 registers */
53 #define GL520_REG_CHIP_ID 0x00
54 #define GL520_REG_REVISION 0x01
55 #define GL520_REG_CONF 0x03
56 #define GL520_REG_MASK 0x11
58 #define GL520_REG_VID_INPUT 0x02
60 static const u8 GL520_REG_IN_INPUT[] = { 0x15, 0x14, 0x13, 0x0d, 0x0e };
61 static const u8 GL520_REG_IN_LIMIT[] = { 0x0c, 0x09, 0x0a, 0x0b };
62 static const u8 GL520_REG_IN_MIN[] = { 0x0c, 0x09, 0x0a, 0x0b, 0x18 };
63 static const u8 GL520_REG_IN_MAX[] = { 0x0c, 0x09, 0x0a, 0x0b, 0x17 };
65 static const u8 GL520_REG_TEMP_INPUT[] = { 0x04, 0x0e };
66 static const u8 GL520_REG_TEMP_MAX[] = { 0x05, 0x17 };
67 static const u8 GL520_REG_TEMP_MAX_HYST[] = { 0x06, 0x18 };
69 #define GL520_REG_FAN_INPUT 0x07
70 #define GL520_REG_FAN_MIN 0x08
71 #define GL520_REG_FAN_DIV 0x0f
72 #define GL520_REG_FAN_OFF GL520_REG_FAN_DIV
74 #define GL520_REG_ALARMS 0x12
75 #define GL520_REG_BEEP_MASK 0x10
76 #define GL520_REG_BEEP_ENABLE GL520_REG_CONF
79 * Function declarations
82 static int gl520_attach_adapter(struct i2c_adapter *adapter);
83 static int gl520_detect(struct i2c_adapter *adapter, int address, int kind);
84 static void gl520_init_client(struct i2c_client *client);
85 static int gl520_detach_client(struct i2c_client *client);
86 static int gl520_read_value(struct i2c_client *client, u8 reg);
87 static int gl520_write_value(struct i2c_client *client, u8 reg, u16 value);
88 static struct gl520_data *gl520_update_device(struct device *dev);
91 static struct i2c_driver gl520_driver = {
95 .attach_adapter = gl520_attach_adapter,
96 .detach_client = gl520_detach_client,
101 struct i2c_client client;
102 struct device *hwmon_dev;
103 struct mutex update_lock;
104 char valid; /* zero until the following fields are valid */
105 unsigned long last_updated; /* in jiffies */
109 u8 in_input[5]; /* [0] = VVD */
110 u8 in_min[5]; /* [0] = VDD */
111 u8 in_max[5]; /* [0] = VDD */
130 static ssize_t get_cpu_vid(struct device *dev, struct device_attribute *attr,
133 struct gl520_data *data = gl520_update_device(dev);
134 return sprintf(buf, "%u\n", vid_from_reg(data->vid, data->vrm));
136 static DEVICE_ATTR(cpu0_vid, S_IRUGO, get_cpu_vid, NULL);
138 #define VDD_FROM_REG(val) (((val)*95+2)/4)
139 #define VDD_TO_REG(val) (SENSORS_LIMIT((((val)*4+47)/95),0,255))
141 #define IN_FROM_REG(val) ((val)*19)
142 #define IN_TO_REG(val) (SENSORS_LIMIT((((val)+9)/19),0,255))
144 static ssize_t get_in_input(struct device *dev, struct device_attribute *attr,
147 int n = to_sensor_dev_attr(attr)->index;
148 struct gl520_data *data = gl520_update_device(dev);
149 u8 r = data->in_input[n];
152 return sprintf(buf, "%d\n", VDD_FROM_REG(r));
154 return sprintf(buf, "%d\n", IN_FROM_REG(r));
157 static ssize_t get_in_min(struct device *dev, struct device_attribute *attr,
160 int n = to_sensor_dev_attr(attr)->index;
161 struct gl520_data *data = gl520_update_device(dev);
162 u8 r = data->in_min[n];
165 return sprintf(buf, "%d\n", VDD_FROM_REG(r));
167 return sprintf(buf, "%d\n", IN_FROM_REG(r));
170 static ssize_t get_in_max(struct device *dev, struct device_attribute *attr,
173 int n = to_sensor_dev_attr(attr)->index;
174 struct gl520_data *data = gl520_update_device(dev);
175 u8 r = data->in_max[n];
178 return sprintf(buf, "%d\n", VDD_FROM_REG(r));
180 return sprintf(buf, "%d\n", IN_FROM_REG(r));
183 static ssize_t set_in_min(struct device *dev, struct device_attribute *attr,
184 const char *buf, size_t count)
186 struct i2c_client *client = to_i2c_client(dev);
187 struct gl520_data *data = i2c_get_clientdata(client);
188 int n = to_sensor_dev_attr(attr)->index;
189 long v = simple_strtol(buf, NULL, 10);
192 mutex_lock(&data->update_lock);
202 gl520_write_value(client, GL520_REG_IN_MIN[n],
203 (gl520_read_value(client, GL520_REG_IN_MIN[n])
206 gl520_write_value(client, GL520_REG_IN_MIN[n], r);
208 mutex_unlock(&data->update_lock);
212 static ssize_t set_in_max(struct device *dev, struct device_attribute *attr,
213 const char *buf, size_t count)
215 struct i2c_client *client = to_i2c_client(dev);
216 struct gl520_data *data = i2c_get_clientdata(client);
217 int n = to_sensor_dev_attr(attr)->index;
218 long v = simple_strtol(buf, NULL, 10);
226 mutex_lock(&data->update_lock);
231 gl520_write_value(client, GL520_REG_IN_MAX[n],
232 (gl520_read_value(client, GL520_REG_IN_MAX[n])
233 & ~0xff00) | (r << 8));
235 gl520_write_value(client, GL520_REG_IN_MAX[n], r);
237 mutex_unlock(&data->update_lock);
241 static SENSOR_DEVICE_ATTR(in0_input, S_IRUGO, get_in_input, NULL, 0);
242 static SENSOR_DEVICE_ATTR(in1_input, S_IRUGO, get_in_input, NULL, 1);
243 static SENSOR_DEVICE_ATTR(in2_input, S_IRUGO, get_in_input, NULL, 2);
244 static SENSOR_DEVICE_ATTR(in3_input, S_IRUGO, get_in_input, NULL, 3);
245 static SENSOR_DEVICE_ATTR(in4_input, S_IRUGO, get_in_input, NULL, 4);
246 static SENSOR_DEVICE_ATTR(in0_min, S_IRUGO | S_IWUSR,
247 get_in_min, set_in_min, 0);
248 static SENSOR_DEVICE_ATTR(in1_min, S_IRUGO | S_IWUSR,
249 get_in_min, set_in_min, 1);
250 static SENSOR_DEVICE_ATTR(in2_min, S_IRUGO | S_IWUSR,
251 get_in_min, set_in_min, 2);
252 static SENSOR_DEVICE_ATTR(in3_min, S_IRUGO | S_IWUSR,
253 get_in_min, set_in_min, 3);
254 static SENSOR_DEVICE_ATTR(in4_min, S_IRUGO | S_IWUSR,
255 get_in_min, set_in_min, 4);
256 static SENSOR_DEVICE_ATTR(in0_max, S_IRUGO | S_IWUSR,
257 get_in_max, set_in_max, 0);
258 static SENSOR_DEVICE_ATTR(in1_max, S_IRUGO | S_IWUSR,
259 get_in_max, set_in_max, 1);
260 static SENSOR_DEVICE_ATTR(in2_max, S_IRUGO | S_IWUSR,
261 get_in_max, set_in_max, 2);
262 static SENSOR_DEVICE_ATTR(in3_max, S_IRUGO | S_IWUSR,
263 get_in_max, set_in_max, 3);
264 static SENSOR_DEVICE_ATTR(in4_max, S_IRUGO | S_IWUSR,
265 get_in_max, set_in_max, 4);
267 #define DIV_FROM_REG(val) (1 << (val))
268 #define FAN_FROM_REG(val,div) ((val)==0 ? 0 : (480000/((val) << (div))))
269 #define FAN_TO_REG(val,div) ((val)<=0?0:SENSORS_LIMIT((480000 + ((val) << ((div)-1))) / ((val) << (div)), 1, 255));
271 static ssize_t get_fan_input(struct device *dev, struct device_attribute *attr,
274 int n = to_sensor_dev_attr(attr)->index;
275 struct gl520_data *data = gl520_update_device(dev);
277 return sprintf(buf, "%d\n", FAN_FROM_REG(data->fan_input[n],
281 static ssize_t get_fan_min(struct device *dev, struct device_attribute *attr,
284 int n = to_sensor_dev_attr(attr)->index;
285 struct gl520_data *data = gl520_update_device(dev);
287 return sprintf(buf, "%d\n", FAN_FROM_REG(data->fan_min[n],
291 static ssize_t get_fan_div(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", DIV_FROM_REG(data->fan_div[n]));
300 static ssize_t get_fan_off(struct device *dev, struct device_attribute *attr,
303 struct gl520_data *data = gl520_update_device(dev);
304 return sprintf(buf, "%d\n", data->fan_off);
307 static ssize_t set_fan_min(struct device *dev, struct device_attribute *attr,
308 const char *buf, size_t count)
310 struct i2c_client *client = to_i2c_client(dev);
311 struct gl520_data *data = i2c_get_clientdata(client);
312 int n = to_sensor_dev_attr(attr)->index;
313 unsigned long v = simple_strtoul(buf, NULL, 10);
316 mutex_lock(&data->update_lock);
317 r = FAN_TO_REG(v, data->fan_div[n]);
318 data->fan_min[n] = r;
321 gl520_write_value(client, GL520_REG_FAN_MIN,
322 (gl520_read_value(client, GL520_REG_FAN_MIN)
323 & ~0xff00) | (r << 8));
325 gl520_write_value(client, GL520_REG_FAN_MIN,
326 (gl520_read_value(client, GL520_REG_FAN_MIN)
329 data->beep_mask = gl520_read_value(client, GL520_REG_BEEP_MASK);
330 if (data->fan_min[n] == 0)
331 data->alarm_mask &= (n == 0) ? ~0x20 : ~0x40;
333 data->alarm_mask |= (n == 0) ? 0x20 : 0x40;
334 data->beep_mask &= data->alarm_mask;
335 gl520_write_value(client, GL520_REG_BEEP_MASK, data->beep_mask);
337 mutex_unlock(&data->update_lock);
341 static ssize_t set_fan_div(struct device *dev, struct device_attribute *attr,
342 const char *buf, size_t count)
344 struct i2c_client *client = to_i2c_client(dev);
345 struct gl520_data *data = i2c_get_clientdata(client);
346 int n = to_sensor_dev_attr(attr)->index;
347 unsigned long v = simple_strtoul(buf, NULL, 10);
351 case 1: r = 0; break;
352 case 2: r = 1; break;
353 case 4: r = 2; break;
354 case 8: r = 3; break;
356 dev_err(&client->dev, "fan_div value %ld not supported. Choose one of 1, 2, 4 or 8!\n", v);
360 mutex_lock(&data->update_lock);
361 data->fan_div[n] = r;
364 gl520_write_value(client, GL520_REG_FAN_DIV,
365 (gl520_read_value(client, GL520_REG_FAN_DIV)
366 & ~0xc0) | (r << 6));
368 gl520_write_value(client, GL520_REG_FAN_DIV,
369 (gl520_read_value(client, GL520_REG_FAN_DIV)
370 & ~0x30) | (r << 4));
372 mutex_unlock(&data->update_lock);
376 static ssize_t set_fan_off(struct device *dev, struct device_attribute *attr,
377 const char *buf, size_t count)
379 struct i2c_client *client = to_i2c_client(dev);
380 struct gl520_data *data = i2c_get_clientdata(client);
381 u8 r = simple_strtoul(buf, NULL, 10)?1:0;
383 mutex_lock(&data->update_lock);
385 gl520_write_value(client, GL520_REG_FAN_OFF,
386 (gl520_read_value(client, GL520_REG_FAN_OFF)
387 & ~0x0c) | (r << 2));
388 mutex_unlock(&data->update_lock);
392 static SENSOR_DEVICE_ATTR(fan1_input, S_IRUGO, get_fan_input, NULL, 0);
393 static SENSOR_DEVICE_ATTR(fan2_input, S_IRUGO, get_fan_input, NULL, 1);
394 static SENSOR_DEVICE_ATTR(fan1_min, S_IRUGO | S_IWUSR,
395 get_fan_min, set_fan_min, 0);
396 static SENSOR_DEVICE_ATTR(fan2_min, S_IRUGO | S_IWUSR,
397 get_fan_min, set_fan_min, 1);
398 static SENSOR_DEVICE_ATTR(fan1_div, S_IRUGO | S_IWUSR,
399 get_fan_div, set_fan_div, 0);
400 static SENSOR_DEVICE_ATTR(fan2_div, S_IRUGO | S_IWUSR,
401 get_fan_div, set_fan_div, 1);
402 static DEVICE_ATTR(fan1_off, S_IRUGO | S_IWUSR,
403 get_fan_off, set_fan_off);
405 #define TEMP_FROM_REG(val) (((val) - 130) * 1000)
406 #define TEMP_TO_REG(val) (SENSORS_LIMIT(((((val)<0?(val)-500:(val)+500) / 1000)+130),0,255))
408 static ssize_t get_temp_input(struct device *dev, struct device_attribute *attr,
411 int n = to_sensor_dev_attr(attr)->index;
412 struct gl520_data *data = gl520_update_device(dev);
414 return sprintf(buf, "%d\n", TEMP_FROM_REG(data->temp_input[n]));
417 static ssize_t get_temp_max(struct device *dev, struct device_attribute *attr,
420 int n = to_sensor_dev_attr(attr)->index;
421 struct gl520_data *data = gl520_update_device(dev);
423 return sprintf(buf, "%d\n", TEMP_FROM_REG(data->temp_max[n]));
426 static ssize_t get_temp_max_hyst(struct device *dev, struct device_attribute
429 int n = to_sensor_dev_attr(attr)->index;
430 struct gl520_data *data = gl520_update_device(dev);
432 return sprintf(buf, "%d\n", TEMP_FROM_REG(data->temp_max_hyst[n]));
435 static ssize_t set_temp_max(struct device *dev, struct device_attribute *attr,
436 const char *buf, size_t count)
438 struct i2c_client *client = to_i2c_client(dev);
439 struct gl520_data *data = i2c_get_clientdata(client);
440 int n = to_sensor_dev_attr(attr)->index;
441 long v = simple_strtol(buf, NULL, 10);
443 mutex_lock(&data->update_lock);
444 data->temp_max[n] = TEMP_TO_REG(v);
445 gl520_write_value(client, GL520_REG_TEMP_MAX[n], data->temp_max[n]);
446 mutex_unlock(&data->update_lock);
450 static ssize_t set_temp_max_hyst(struct device *dev, struct device_attribute
451 *attr, const char *buf, size_t count)
453 struct i2c_client *client = to_i2c_client(dev);
454 struct gl520_data *data = i2c_get_clientdata(client);
455 int n = to_sensor_dev_attr(attr)->index;
456 long v = simple_strtol(buf, NULL, 10);
458 mutex_lock(&data->update_lock);
459 data->temp_max_hyst[n] = TEMP_TO_REG(v);
460 gl520_write_value(client, GL520_REG_TEMP_MAX_HYST[n],
461 data->temp_max_hyst[n]);
462 mutex_unlock(&data->update_lock);
466 static SENSOR_DEVICE_ATTR(temp1_input, S_IRUGO, get_temp_input, NULL, 0);
467 static SENSOR_DEVICE_ATTR(temp2_input, S_IRUGO, get_temp_input, NULL, 1);
468 static SENSOR_DEVICE_ATTR(temp1_max, S_IRUGO | S_IWUSR,
469 get_temp_max, set_temp_max, 0);
470 static SENSOR_DEVICE_ATTR(temp2_max, S_IRUGO | S_IWUSR,
471 get_temp_max, set_temp_max, 1);
472 static SENSOR_DEVICE_ATTR(temp1_max_hyst, S_IRUGO | S_IWUSR,
473 get_temp_max_hyst, set_temp_max_hyst, 0);
474 static SENSOR_DEVICE_ATTR(temp2_max_hyst, S_IRUGO | S_IWUSR,
475 get_temp_max_hyst, set_temp_max_hyst, 1);
477 static ssize_t get_alarms(struct device *dev, struct device_attribute *attr,
480 struct gl520_data *data = gl520_update_device(dev);
481 return sprintf(buf, "%d\n", data->alarms);
484 static ssize_t get_beep_enable(struct device *dev, struct device_attribute
487 struct gl520_data *data = gl520_update_device(dev);
488 return sprintf(buf, "%d\n", data->beep_enable);
491 static ssize_t get_beep_mask(struct device *dev, struct device_attribute *attr,
494 struct gl520_data *data = gl520_update_device(dev);
495 return sprintf(buf, "%d\n", data->beep_mask);
498 static ssize_t set_beep_enable(struct device *dev, struct device_attribute
499 *attr, const char *buf, size_t count)
501 struct i2c_client *client = to_i2c_client(dev);
502 struct gl520_data *data = i2c_get_clientdata(client);
503 u8 r = simple_strtoul(buf, NULL, 10)?0:1;
505 mutex_lock(&data->update_lock);
506 data->beep_enable = !r;
507 gl520_write_value(client, GL520_REG_BEEP_ENABLE,
508 (gl520_read_value(client, GL520_REG_BEEP_ENABLE)
509 & ~0x04) | (r << 2));
510 mutex_unlock(&data->update_lock);
514 static ssize_t set_beep_mask(struct device *dev, struct device_attribute *attr,
515 const char *buf, size_t count)
517 struct i2c_client *client = to_i2c_client(dev);
518 struct gl520_data *data = i2c_get_clientdata(client);
519 u8 r = simple_strtoul(buf, NULL, 10);
521 mutex_lock(&data->update_lock);
522 r &= data->alarm_mask;
524 gl520_write_value(client, GL520_REG_BEEP_MASK, r);
525 mutex_unlock(&data->update_lock);
529 static DEVICE_ATTR(alarms, S_IRUGO, get_alarms, NULL);
530 static DEVICE_ATTR(beep_enable, S_IRUGO | S_IWUSR,
531 get_beep_enable, set_beep_enable);
532 static DEVICE_ATTR(beep_mask, S_IRUGO | S_IWUSR,
533 get_beep_mask, set_beep_mask);
535 static struct attribute *gl520_attributes[] = {
536 &dev_attr_cpu0_vid.attr,
538 &sensor_dev_attr_in0_input.dev_attr.attr,
539 &sensor_dev_attr_in0_min.dev_attr.attr,
540 &sensor_dev_attr_in0_max.dev_attr.attr,
541 &sensor_dev_attr_in1_input.dev_attr.attr,
542 &sensor_dev_attr_in1_min.dev_attr.attr,
543 &sensor_dev_attr_in1_max.dev_attr.attr,
544 &sensor_dev_attr_in2_input.dev_attr.attr,
545 &sensor_dev_attr_in2_min.dev_attr.attr,
546 &sensor_dev_attr_in2_max.dev_attr.attr,
547 &sensor_dev_attr_in3_input.dev_attr.attr,
548 &sensor_dev_attr_in3_min.dev_attr.attr,
549 &sensor_dev_attr_in3_max.dev_attr.attr,
551 &sensor_dev_attr_fan1_input.dev_attr.attr,
552 &sensor_dev_attr_fan1_min.dev_attr.attr,
553 &sensor_dev_attr_fan1_div.dev_attr.attr,
554 &dev_attr_fan1_off.attr,
555 &sensor_dev_attr_fan2_input.dev_attr.attr,
556 &sensor_dev_attr_fan2_min.dev_attr.attr,
557 &sensor_dev_attr_fan2_div.dev_attr.attr,
559 &sensor_dev_attr_temp1_input.dev_attr.attr,
560 &sensor_dev_attr_temp1_max.dev_attr.attr,
561 &sensor_dev_attr_temp1_max_hyst.dev_attr.attr,
563 &dev_attr_alarms.attr,
564 &dev_attr_beep_enable.attr,
565 &dev_attr_beep_mask.attr,
569 static const struct attribute_group gl520_group = {
570 .attrs = gl520_attributes,
573 static struct attribute *gl520_attributes_opt[] = {
574 &sensor_dev_attr_in4_input.dev_attr.attr,
575 &sensor_dev_attr_in4_min.dev_attr.attr,
576 &sensor_dev_attr_in4_max.dev_attr.attr,
578 &sensor_dev_attr_temp2_input.dev_attr.attr,
579 &sensor_dev_attr_temp2_max.dev_attr.attr,
580 &sensor_dev_attr_temp2_max_hyst.dev_attr.attr,
584 static const struct attribute_group gl520_group_opt = {
585 .attrs = gl520_attributes_opt,
593 static int gl520_attach_adapter(struct i2c_adapter *adapter)
595 if (!(adapter->class & I2C_CLASS_HWMON))
597 return i2c_probe(adapter, &addr_data, gl520_detect);
600 static int gl520_detect(struct i2c_adapter *adapter, int address, int kind)
602 struct i2c_client *client;
603 struct gl520_data *data;
606 if (!i2c_check_functionality(adapter, I2C_FUNC_SMBUS_BYTE_DATA |
607 I2C_FUNC_SMBUS_WORD_DATA))
610 /* OK. For now, we presume we have a valid client. We now create the
611 client structure, even though we cannot fill it completely yet.
612 But it allows us to access gl520_{read,write}_value. */
614 if (!(data = kzalloc(sizeof(struct gl520_data), GFP_KERNEL))) {
619 client = &data->client;
620 i2c_set_clientdata(client, data);
621 client->addr = address;
622 client->adapter = adapter;
623 client->driver = &gl520_driver;
625 /* Determine the chip type. */
627 if ((gl520_read_value(client, GL520_REG_CHIP_ID) != 0x20) ||
628 ((gl520_read_value(client, GL520_REG_REVISION) & 0x7f) != 0x00) ||
629 ((gl520_read_value(client, GL520_REG_CONF) & 0x80) != 0x00)) {
630 dev_dbg(&client->dev, "Unknown chip type, skipping\n");
635 /* Fill in the remaining client fields */
636 strlcpy(client->name, "gl520sm", I2C_NAME_SIZE);
637 mutex_init(&data->update_lock);
639 /* Tell the I2C layer a new client has arrived */
640 if ((err = i2c_attach_client(client)))
643 /* Initialize the GL520SM chip */
644 gl520_init_client(client);
646 /* Register sysfs hooks */
647 if ((err = sysfs_create_group(&client->dev.kobj, &gl520_group)))
650 if (data->two_temps) {
651 if ((err = device_create_file(&client->dev,
652 &sensor_dev_attr_temp2_input.dev_attr))
653 || (err = device_create_file(&client->dev,
654 &sensor_dev_attr_temp2_max.dev_attr))
655 || (err = device_create_file(&client->dev,
656 &sensor_dev_attr_temp2_max_hyst.dev_attr)))
657 goto exit_remove_files;
659 if ((err = device_create_file(&client->dev,
660 &sensor_dev_attr_in4_input.dev_attr))
661 || (err = device_create_file(&client->dev,
662 &sensor_dev_attr_in4_min.dev_attr))
663 || (err = device_create_file(&client->dev,
664 &sensor_dev_attr_in4_max.dev_attr)))
665 goto exit_remove_files;
669 data->hwmon_dev = hwmon_device_register(&client->dev);
670 if (IS_ERR(data->hwmon_dev)) {
671 err = PTR_ERR(data->hwmon_dev);
672 goto exit_remove_files;
678 sysfs_remove_group(&client->dev.kobj, &gl520_group);
679 sysfs_remove_group(&client->dev.kobj, &gl520_group_opt);
681 i2c_detach_client(client);
689 /* Called when we have found a new GL520SM. */
690 static void gl520_init_client(struct i2c_client *client)
692 struct gl520_data *data = i2c_get_clientdata(client);
695 conf = oldconf = gl520_read_value(client, GL520_REG_CONF);
697 data->alarm_mask = 0xff;
698 data->vrm = vid_which_vrm();
700 if (extra_sensor_type == 1)
702 else if (extra_sensor_type == 2)
704 data->two_temps = !(conf & 0x10);
706 /* If IRQ# is disabled, we can safely force comparator mode */
710 /* Enable monitoring if needed */
714 gl520_write_value(client, GL520_REG_CONF, conf);
716 gl520_update_device(&(client->dev));
718 if (data->fan_min[0] == 0)
719 data->alarm_mask &= ~0x20;
720 if (data->fan_min[1] == 0)
721 data->alarm_mask &= ~0x40;
723 data->beep_mask &= data->alarm_mask;
724 gl520_write_value(client, GL520_REG_BEEP_MASK, data->beep_mask);
727 static int gl520_detach_client(struct i2c_client *client)
729 struct gl520_data *data = i2c_get_clientdata(client);
732 hwmon_device_unregister(data->hwmon_dev);
733 sysfs_remove_group(&client->dev.kobj, &gl520_group);
734 sysfs_remove_group(&client->dev.kobj, &gl520_group_opt);
736 if ((err = i2c_detach_client(client)))
744 /* Registers 0x07 to 0x0c are word-sized, others are byte-sized
745 GL520 uses a high-byte first convention */
746 static int gl520_read_value(struct i2c_client *client, u8 reg)
748 if ((reg >= 0x07) && (reg <= 0x0c))
749 return swab16(i2c_smbus_read_word_data(client, reg));
751 return i2c_smbus_read_byte_data(client, reg);
754 static int gl520_write_value(struct i2c_client *client, u8 reg, u16 value)
756 if ((reg >= 0x07) && (reg <= 0x0c))
757 return i2c_smbus_write_word_data(client, reg, swab16(value));
759 return i2c_smbus_write_byte_data(client, reg, value);
763 static struct gl520_data *gl520_update_device(struct device *dev)
765 struct i2c_client *client = to_i2c_client(dev);
766 struct gl520_data *data = i2c_get_clientdata(client);
769 mutex_lock(&data->update_lock);
771 if (time_after(jiffies, data->last_updated + 2 * HZ) || !data->valid) {
773 dev_dbg(&client->dev, "Starting gl520sm update\n");
775 data->alarms = gl520_read_value(client, GL520_REG_ALARMS);
776 data->beep_mask = gl520_read_value(client, GL520_REG_BEEP_MASK);
777 data->vid = gl520_read_value(client, GL520_REG_VID_INPUT) & 0x1f;
779 for (i = 0; i < 4; i++) {
780 data->in_input[i] = gl520_read_value(client,
781 GL520_REG_IN_INPUT[i]);
782 val = gl520_read_value(client, GL520_REG_IN_LIMIT[i]);
783 data->in_min[i] = val & 0xff;
784 data->in_max[i] = (val >> 8) & 0xff;
787 val = gl520_read_value(client, GL520_REG_FAN_INPUT);
788 data->fan_input[0] = (val >> 8) & 0xff;
789 data->fan_input[1] = val & 0xff;
791 val = gl520_read_value(client, GL520_REG_FAN_MIN);
792 data->fan_min[0] = (val >> 8) & 0xff;
793 data->fan_min[1] = val & 0xff;
795 data->temp_input[0] = gl520_read_value(client,
796 GL520_REG_TEMP_INPUT[0]);
797 data->temp_max[0] = gl520_read_value(client,
798 GL520_REG_TEMP_MAX[0]);
799 data->temp_max_hyst[0] = gl520_read_value(client,
800 GL520_REG_TEMP_MAX_HYST[0]);
802 val = gl520_read_value(client, GL520_REG_FAN_DIV);
803 data->fan_div[0] = (val >> 6) & 0x03;
804 data->fan_div[1] = (val >> 4) & 0x03;
805 data->fan_off = (val >> 2) & 0x01;
807 data->alarms &= data->alarm_mask;
809 val = gl520_read_value(client, GL520_REG_CONF);
810 data->beep_enable = !((val >> 2) & 1);
812 /* Temp1 and Vin4 are the same input */
813 if (data->two_temps) {
814 data->temp_input[1] = gl520_read_value(client,
815 GL520_REG_TEMP_INPUT[1]);
816 data->temp_max[1] = gl520_read_value(client,
817 GL520_REG_TEMP_MAX[1]);
818 data->temp_max_hyst[1] = gl520_read_value(client,
819 GL520_REG_TEMP_MAX_HYST[1]);
821 data->in_input[4] = gl520_read_value(client,
822 GL520_REG_IN_INPUT[4]);
823 data->in_min[4] = gl520_read_value(client,
824 GL520_REG_IN_MIN[4]);
825 data->in_max[4] = gl520_read_value(client,
826 GL520_REG_IN_MAX[4]);
829 data->last_updated = jiffies;
833 mutex_unlock(&data->update_lock);
839 static int __init sensors_gl520sm_init(void)
841 return i2c_add_driver(&gl520_driver);
844 static void __exit sensors_gl520sm_exit(void)
846 i2c_del_driver(&gl520_driver);
850 MODULE_AUTHOR("Frodo Looijaard <frodol@dds.nl>, "
851 "Kyösti Mälkki <kmalkki@cc.hut.fi>, "
852 "Maarten Deprez <maartendeprez@users.sourceforge.net>");
853 MODULE_DESCRIPTION("GL520SM driver");
854 MODULE_LICENSE("GPL");
856 module_init(sensors_gl520sm_init);
857 module_exit(sensors_gl520sm_exit);