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memory hotplug: fix section info double registration bug
[mirror_ubuntu-bionic-kernel.git] / drivers / hwmon / gl520sm.c
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1da177e4 1/*
43da3d12
GR		 2 * gl520sm.c - Part of lm_sensors, Linux kernel modules for hardware
3 * monitoring
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>
7 *
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.
12 *
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.
17 *
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.
21 *
22 */
1da177e4
LT		 23
24#include <linux/module.h>
25#include <linux/init.h>
26#include <linux/slab.h>
0cacdf29 27#include <linux/jiffies.h>
1da177e4 28#include <linux/i2c.h>
943b0830 29#include <linux/hwmon.h>
86d47f12 30#include <linux/hwmon-sysfs.h>
303760b4 31#include <linux/hwmon-vid.h>
943b0830 32#include <linux/err.h>
9a61bf63 33#include <linux/mutex.h>
87808be4 34#include <linux/sysfs.h>
1da177e4
LT		 35
36/* Type of the extra sensor */
37static unsigned short extra_sensor_type;
38module_param(extra_sensor_type, ushort, 0);
39MODULE_PARM_DESC(extra_sensor_type, "Type of extra sensor (0=autodetect, 1=temperature, 2=voltage)");
40
41/* Addresses to scan */
25e9c86d 42static const unsigned short normal_i2c[] = { 0x2c, 0x2d, I2C_CLIENT_END };
1da177e4 43
43da3d12
GR		 44/*
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
48 */
1da177e4
LT		 49
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
55
56#define GL520_REG_VID_INPUT 0x02
57
8b4b0ab4
JD		 58static const u8 GL520_REG_IN_INPUT[] = { 0x15, 0x14, 0x13, 0x0d, 0x0e };
59static const u8 GL520_REG_IN_LIMIT[] = { 0x0c, 0x09, 0x0a, 0x0b };
60static const u8 GL520_REG_IN_MIN[] = { 0x0c, 0x09, 0x0a, 0x0b, 0x18 };
61static const u8 GL520_REG_IN_MAX[] = { 0x0c, 0x09, 0x0a, 0x0b, 0x17 };
62
63static const u8 GL520_REG_TEMP_INPUT[] = { 0x04, 0x0e };
64static const u8 GL520_REG_TEMP_MAX[] = { 0x05, 0x17 };
65static const u8 GL520_REG_TEMP_MAX_HYST[] = { 0x06, 0x18 };
1da177e4
LT		 66
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
71
72#define GL520_REG_ALARMS 0x12
73#define GL520_REG_BEEP_MASK 0x10
74#define GL520_REG_BEEP_ENABLE GL520_REG_CONF
75
76/*
77 * Function declarations
78 */
79
a23a9fe1
JD		 80static int gl520_probe(struct i2c_client *client,
81 const struct i2c_device_id *id);
310ec792 82static int gl520_detect(struct i2c_client *client, struct i2c_board_info *info);
1da177e4 83static void gl520_init_client(struct i2c_client *client);
a23a9fe1 84static int gl520_remove(struct i2c_client *client);
1da177e4
LT		 85static int gl520_read_value(struct i2c_client *client, u8 reg);
86static int gl520_write_value(struct i2c_client *client, u8 reg, u16 value);
87static struct gl520_data *gl520_update_device(struct device *dev);
88
89/* Driver data */
a23a9fe1 90static const struct i2c_device_id gl520_id[] = {
1f86df49 91 { "gl520sm", 0 },
a23a9fe1
JD		 92 { }
93};
94MODULE_DEVICE_TABLE(i2c, gl520_id);
95
1da177e4 96static struct i2c_driver gl520_driver = {
a23a9fe1 97 .class = I2C_CLASS_HWMON,
cdaf7934 98 .driver = {
cdaf7934
LR		 99 .name = "gl520sm",
100 },
a23a9fe1
JD		 101 .probe = gl520_probe,
102 .remove = gl520_remove,
103 .id_table = gl520_id,
104 .detect = gl520_detect,
c3813d6a 105 .address_list = normal_i2c,
1da177e4
LT		 106};
107
108/* Client data */
109struct gl520_data {
1beeffe4 110 struct device *hwmon_dev;
9a61bf63 111 struct mutex update_lock;
1da177e4
LT		 112 char valid; /* zero until the following fields are valid */
113 unsigned long last_updated; /* in jiffies */
114
115 u8 vid;
116 u8 vrm;
117 u8 in_input[5]; /* [0] = VVD */
118 u8 in_min[5]; /* [0] = VDD */
119 u8 in_max[5]; /* [0] = VDD */
120 u8 fan_input[2];
121 u8 fan_min[2];
122 u8 fan_div[2];
123 u8 fan_off;
124 u8 temp_input[2];
125 u8 temp_max[2];
126 u8 temp_max_hyst[2];
127 u8 alarms;
128 u8 beep_enable;
129 u8 beep_mask;
130 u8 alarm_mask;
131 u8 two_temps;
132};
133
134/*
135 * Sysfs stuff
136 */
137
86d47f12
JD		 138static ssize_t get_cpu_vid(struct device *dev, struct device_attribute *attr,
139 char *buf)
1da177e4 140{
86d47f12 141 struct gl520_data *data = gl520_update_device(dev);
1da177e4
LT		 142 return sprintf(buf, "%u\n", vid_from_reg(data->vid, data->vrm));
143}
86d47f12 144static DEVICE_ATTR(cpu0_vid, S_IRUGO, get_cpu_vid, NULL);
1da177e4 145
43da3d12
GR		 146#define VDD_FROM_REG(val) (((val) * 95 + 2) / 4)
147#define VDD_TO_REG(val) SENSORS_LIMIT((((val) * 4 + 47) / 95), 0, 255)
1da177e4 148
43da3d12
GR		 149#define IN_FROM_REG(val) ((val) * 19)
150#define IN_TO_REG(val) SENSORS_LIMIT((((val) + 9) / 19), 0, 255)
1da177e4 151
86d47f12
JD		 152static ssize_t get_in_input(struct device *dev, struct device_attribute *attr,
153 char *buf)
1da177e4 154{
86d47f12
JD		 155 int n = to_sensor_dev_attr(attr)->index;
156 struct gl520_data *data = gl520_update_device(dev);
1da177e4
LT		 157 u8 r = data->in_input[n];
158
159 if (n == 0)
160 return sprintf(buf, "%d\n", VDD_FROM_REG(r));
161 else
162 return sprintf(buf, "%d\n", IN_FROM_REG(r));
163}
164
86d47f12
JD		 165static ssize_t get_in_min(struct device *dev, struct device_attribute *attr,
166 char *buf)
1da177e4 167{
86d47f12
JD		 168 int n = to_sensor_dev_attr(attr)->index;
169 struct gl520_data *data = gl520_update_device(dev);
1da177e4
LT		 170 u8 r = data->in_min[n];
171
172 if (n == 0)
173 return sprintf(buf, "%d\n", VDD_FROM_REG(r));
174 else
175 return sprintf(buf, "%d\n", IN_FROM_REG(r));
176}
177
86d47f12
JD		 178static ssize_t get_in_max(struct device *dev, struct device_attribute *attr,
179 char *buf)
1da177e4 180{
86d47f12
JD		 181 int n = to_sensor_dev_attr(attr)->index;
182 struct gl520_data *data = gl520_update_device(dev);
1da177e4
LT		 183 u8 r = data->in_max[n];
184
185 if (n == 0)
186 return sprintf(buf, "%d\n", VDD_FROM_REG(r));
187 else
188 return sprintf(buf, "%d\n", IN_FROM_REG(r));
189}
190
86d47f12
JD		 191static ssize_t set_in_min(struct device *dev, struct device_attribute *attr,
192 const char *buf, size_t count)
1da177e4 193{
86d47f12
JD		 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;
1da177e4 197 u8 r;
43da3d12
GR		 198 long v;
199 int err;
200
201 err = kstrtol(buf, 10, &v);
202 if (err)
203 return err;
1da177e4 204
9a61bf63 205 mutex_lock(&data->update_lock);
1da177e4
LT		 206
207 if (n == 0)
208 r = VDD_TO_REG(v);
209 else
210 r = IN_TO_REG(v);
211
212 data->in_min[n] = r;
213
214 if (n < 4)
86d47f12
JD		 215 gl520_write_value(client, GL520_REG_IN_MIN[n],
216 (gl520_read_value(client, GL520_REG_IN_MIN[n])
217 & ~0xff) | r);
1da177e4 218 else
86d47f12 219 gl520_write_value(client, GL520_REG_IN_MIN[n], r);
1da177e4 220
9a61bf63 221 mutex_unlock(&data->update_lock);
1da177e4
LT		 222 return count;
223}
224
86d47f12
JD		 225static ssize_t set_in_max(struct device *dev, struct device_attribute *attr,
226 const char *buf, size_t count)
1da177e4 227{
86d47f12
JD		 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;
1da177e4 231 u8 r;
43da3d12
GR		 232 long v;
233 int err;
234
235 err = kstrtol(buf, 10, &v);
236 if (err)
237 return err;
1da177e4
LT		 238
239 if (n == 0)
240 r = VDD_TO_REG(v);
241 else
242 r = IN_TO_REG(v);
243
9a61bf63 244 mutex_lock(&data->update_lock);
1da177e4
LT		 245
246 data->in_max[n] = r;
247
248 if (n < 4)
86d47f12
JD		 249 gl520_write_value(client, GL520_REG_IN_MAX[n],
250 (gl520_read_value(client, GL520_REG_IN_MAX[n])
251 & ~0xff00) | (r << 8));
1da177e4 252 else
86d47f12 253 gl520_write_value(client, GL520_REG_IN_MAX[n], r);
1da177e4 254
9a61bf63 255 mutex_unlock(&data->update_lock);
1da177e4
LT		 256 return count;
257}
258
86d47f12
JD		 259static SENSOR_DEVICE_ATTR(in0_input, S_IRUGO, get_in_input, NULL, 0);
260static SENSOR_DEVICE_ATTR(in1_input, S_IRUGO, get_in_input, NULL, 1);
261static SENSOR_DEVICE_ATTR(in2_input, S_IRUGO, get_in_input, NULL, 2);
262static SENSOR_DEVICE_ATTR(in3_input, S_IRUGO, get_in_input, NULL, 3);
263static SENSOR_DEVICE_ATTR(in4_input, S_IRUGO, get_in_input, NULL, 4);
264static SENSOR_DEVICE_ATTR(in0_min, S_IRUGO | S_IWUSR,
265 get_in_min, set_in_min, 0);
266static SENSOR_DEVICE_ATTR(in1_min, S_IRUGO | S_IWUSR,
267 get_in_min, set_in_min, 1);
268static SENSOR_DEVICE_ATTR(in2_min, S_IRUGO | S_IWUSR,
269 get_in_min, set_in_min, 2);
270static SENSOR_DEVICE_ATTR(in3_min, S_IRUGO | S_IWUSR,
271 get_in_min, set_in_min, 3);
272static SENSOR_DEVICE_ATTR(in4_min, S_IRUGO | S_IWUSR,
273 get_in_min, set_in_min, 4);
274static SENSOR_DEVICE_ATTR(in0_max, S_IRUGO | S_IWUSR,
275 get_in_max, set_in_max, 0);
276static SENSOR_DEVICE_ATTR(in1_max, S_IRUGO | S_IWUSR,
277 get_in_max, set_in_max, 1);
278static SENSOR_DEVICE_ATTR(in2_max, S_IRUGO | S_IWUSR,
279 get_in_max, set_in_max, 2);
280static SENSOR_DEVICE_ATTR(in3_max, S_IRUGO | S_IWUSR,
281 get_in_max, set_in_max, 3);
282static SENSOR_DEVICE_ATTR(in4_max, S_IRUGO | S_IWUSR,
283 get_in_max, set_in_max, 4);
284
1da177e4 285#define DIV_FROM_REG(val) (1 << (val))
43da3d12
GR		 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, \
289 255))
1da177e4 290
86d47f12
JD		 291static ssize_t get_fan_input(struct device *dev, struct device_attribute *attr,
292 char *buf)
1da177e4 293{
86d47f12
JD		 294 int n = to_sensor_dev_attr(attr)->index;
295 struct gl520_data *data = gl520_update_device(dev);
296
297 return sprintf(buf, "%d\n", FAN_FROM_REG(data->fan_input[n],
298 data->fan_div[n]));
1da177e4
LT		 299}
300
86d47f12
JD		 301static ssize_t get_fan_min(struct device *dev, struct device_attribute *attr,
302 char *buf)
1da177e4 303{
86d47f12
JD		 304 int n = to_sensor_dev_attr(attr)->index;
305 struct gl520_data *data = gl520_update_device(dev);
306
307 return sprintf(buf, "%d\n", FAN_FROM_REG(data->fan_min[n],
308 data->fan_div[n]));
1da177e4
LT		 309}
310
86d47f12
JD		 311static ssize_t get_fan_div(struct device *dev, struct device_attribute *attr,
312 char *buf)
1da177e4 313{
86d47f12
JD		 314 int n = to_sensor_dev_attr(attr)->index;
315 struct gl520_data *data = gl520_update_device(dev);
316
317 return sprintf(buf, "%d\n", DIV_FROM_REG(data->fan_div[n]));
1da177e4
LT		 318}
319
86d47f12
JD		 320static ssize_t get_fan_off(struct device *dev, struct device_attribute *attr,
321 char *buf)
1da177e4 322{
86d47f12 323 struct gl520_data *data = gl520_update_device(dev);
1da177e4
LT		 324 return sprintf(buf, "%d\n", data->fan_off);
325}
326
86d47f12
JD		 327static ssize_t set_fan_min(struct device *dev, struct device_attribute *attr,
328 const char *buf, size_t count)
1da177e4 329{
86d47f12
JD		 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;
1da177e4 333 u8 r;
43da3d12
GR		 334 unsigned long v;
335 int err;
336
337 err = kstrtoul(buf, 10, &v);
338 if (err)
339 return err;
1da177e4 340
9a61bf63 341 mutex_lock(&data->update_lock);
86d47f12
JD		 342 r = FAN_TO_REG(v, data->fan_div[n]);
343 data->fan_min[n] = r;
1da177e4 344
86d47f12
JD		 345 if (n == 0)
346 gl520_write_value(client, GL520_REG_FAN_MIN,
347 (gl520_read_value(client, GL520_REG_FAN_MIN)
348 & ~0xff00) | (r << 8));
1da177e4 349 else
86d47f12
JD		 350 gl520_write_value(client, GL520_REG_FAN_MIN,
351 (gl520_read_value(client, GL520_REG_FAN_MIN)
352 & ~0xff) | r);
1da177e4
LT		 353
354 data->beep_mask = gl520_read_value(client, GL520_REG_BEEP_MASK);
86d47f12
JD		 355 if (data->fan_min[n] == 0)
356 data->alarm_mask &= (n == 0) ? ~0x20 : ~0x40;
1da177e4 357 else
86d47f12 358 data->alarm_mask |= (n == 0) ? 0x20 : 0x40;
1da177e4
LT		 359 data->beep_mask &= data->alarm_mask;
360 gl520_write_value(client, GL520_REG_BEEP_MASK, data->beep_mask);
361
9a61bf63 362 mutex_unlock(&data->update_lock);
1da177e4
LT		 363 return count;
364}
365
86d47f12
JD		 366static ssize_t set_fan_div(struct device *dev, struct device_attribute *attr,
367 const char *buf, size_t count)
1da177e4 368{
86d47f12
JD		 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;
1da177e4 372 u8 r;
43da3d12
GR		 373 unsigned long v;
374 int err;
375
376 err = kstrtoul(buf, 10, &v);
377 if (err)
378 return err;
1da177e4
LT		 379
380 switch (v) {
43da3d12
GR		 381 case 1:
382 r = 0;
383 break;
384 case 2:
385 r = 1;
386 break;
387 case 4:
388 r = 2;
389 break;
390 case 8:
391 r = 3;
392 break;
1da177e4 393 default:
43da3d12
GR		 394 dev_err(&client->dev,
395 "fan_div value %ld not supported. Choose one of 1, 2, 4 or 8!\n", v);
1da177e4
LT		 396 return -EINVAL;
397 }
398
9a61bf63 399 mutex_lock(&data->update_lock);
86d47f12 400 data->fan_div[n] = r;
1da177e4 401
86d47f12
JD		 402 if (n == 0)
403 gl520_write_value(client, GL520_REG_FAN_DIV,
404 (gl520_read_value(client, GL520_REG_FAN_DIV)
405 & ~0xc0) | (r << 6));
1da177e4 406 else
86d47f12
JD		 407 gl520_write_value(client, GL520_REG_FAN_DIV,
408 (gl520_read_value(client, GL520_REG_FAN_DIV)
409 & ~0x30) | (r << 4));
1da177e4 410
9a61bf63 411 mutex_unlock(&data->update_lock);
1da177e4
LT		 412 return count;
413}
414
86d47f12
JD		 415static ssize_t set_fan_off(struct device *dev, struct device_attribute *attr,
416 const char *buf, size_t count)
1da177e4 417{
86d47f12
JD		 418 struct i2c_client *client = to_i2c_client(dev);
419 struct gl520_data *data = i2c_get_clientdata(client);
43da3d12
GR		 420 u8 r;
421 unsigned long v;
422 int err;
423
424 err = kstrtoul(buf, 10, &v);
425 if (err)
426 return err;
427
428 r = (v ? 1 : 0);
1da177e4 429
9a61bf63 430 mutex_lock(&data->update_lock);
1da177e4 431 data->fan_off = r;
86d47f12
JD		 432 gl520_write_value(client, GL520_REG_FAN_OFF,
433 (gl520_read_value(client, GL520_REG_FAN_OFF)
434 & ~0x0c) | (r << 2));
9a61bf63 435 mutex_unlock(&data->update_lock);
1da177e4
LT		 436 return count;
437}
438
86d47f12
JD		 439static SENSOR_DEVICE_ATTR(fan1_input, S_IRUGO, get_fan_input, NULL, 0);
440static SENSOR_DEVICE_ATTR(fan2_input, S_IRUGO, get_fan_input, NULL, 1);
441static SENSOR_DEVICE_ATTR(fan1_min, S_IRUGO | S_IWUSR,
442 get_fan_min, set_fan_min, 0);
443static SENSOR_DEVICE_ATTR(fan2_min, S_IRUGO | S_IWUSR,
444 get_fan_min, set_fan_min, 1);
445static SENSOR_DEVICE_ATTR(fan1_div, S_IRUGO | S_IWUSR,
446 get_fan_div, set_fan_div, 0);
447static SENSOR_DEVICE_ATTR(fan2_div, S_IRUGO | S_IWUSR,
448 get_fan_div, set_fan_div, 1);
449static DEVICE_ATTR(fan1_off, S_IRUGO | S_IWUSR,
450 get_fan_off, set_fan_off);
451
1da177e4 452#define TEMP_FROM_REG(val) (((val) - 130) * 1000)
43da3d12
GR		 453#define TEMP_TO_REG(val) SENSORS_LIMIT(((((val) < 0 ? \
454 (val) - 500 : (val) + 500) / 1000) + 130), 0, 255)
1da177e4 455
86d47f12
JD		 456static ssize_t get_temp_input(struct device *dev, struct device_attribute *attr,
457 char *buf)
1da177e4 458{
86d47f12
JD		 459 int n = to_sensor_dev_attr(attr)->index;
460 struct gl520_data *data = gl520_update_device(dev);
461
462 return sprintf(buf, "%d\n", TEMP_FROM_REG(data->temp_input[n]));
1da177e4
LT		 463}
464
86d47f12
JD		 465static ssize_t get_temp_max(struct device *dev, struct device_attribute *attr,
466 char *buf)
1da177e4 467{
86d47f12
JD		 468 int n = to_sensor_dev_attr(attr)->index;
469 struct gl520_data *data = gl520_update_device(dev);
470
471 return sprintf(buf, "%d\n", TEMP_FROM_REG(data->temp_max[n]));
1da177e4
LT		 472}
473
43da3d12
GR		 474static ssize_t get_temp_max_hyst(struct device *dev,
475 struct device_attribute *attr, char *buf)
1da177e4 476{
86d47f12
JD		 477 int n = to_sensor_dev_attr(attr)->index;
478 struct gl520_data *data = gl520_update_device(dev);
479
480 return sprintf(buf, "%d\n", TEMP_FROM_REG(data->temp_max_hyst[n]));
1da177e4
LT		 481}
482
86d47f12
JD		 483static ssize_t set_temp_max(struct device *dev, struct device_attribute *attr,
484 const char *buf, size_t count)
1da177e4 485{
86d47f12
JD		 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;
43da3d12
GR		 489 long v;
490 int err;
491
492 err = kstrtol(buf, 10, &v);
493 if (err)
494 return err;
1da177e4 495
9a61bf63 496 mutex_lock(&data->update_lock);
86d47f12
JD		 497 data->temp_max[n] = TEMP_TO_REG(v);
498 gl520_write_value(client, GL520_REG_TEMP_MAX[n], data->temp_max[n]);
9a61bf63 499 mutex_unlock(&data->update_lock);
1da177e4
LT		 500 return count;
501}
502
86d47f12
JD		 503static ssize_t set_temp_max_hyst(struct device *dev, struct device_attribute
504 *attr, const char *buf, size_t count)
1da177e4 505{
86d47f12
JD		 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;
43da3d12
GR		 509 long v;
510 int err;
511
512 err = kstrtol(buf, 10, &v);
513 if (err)
514 return err;
1da177e4 515
9a61bf63 516 mutex_lock(&data->update_lock);
86d47f12
JD		 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]);
9a61bf63 520 mutex_unlock(&data->update_lock);
1da177e4
LT		 521 return count;
522}
523
86d47f12
JD		 524static SENSOR_DEVICE_ATTR(temp1_input, S_IRUGO, get_temp_input, NULL, 0);
525static SENSOR_DEVICE_ATTR(temp2_input, S_IRUGO, get_temp_input, NULL, 1);
526static SENSOR_DEVICE_ATTR(temp1_max, S_IRUGO | S_IWUSR,
527 get_temp_max, set_temp_max, 0);
528static SENSOR_DEVICE_ATTR(temp2_max, S_IRUGO | S_IWUSR,
529 get_temp_max, set_temp_max, 1);
530static SENSOR_DEVICE_ATTR(temp1_max_hyst, S_IRUGO | S_IWUSR,
531 get_temp_max_hyst, set_temp_max_hyst, 0);
532static SENSOR_DEVICE_ATTR(temp2_max_hyst, S_IRUGO | S_IWUSR,
533 get_temp_max_hyst, set_temp_max_hyst, 1);
534
535static ssize_t get_alarms(struct device *dev, struct device_attribute *attr,
536 char *buf)
1da177e4 537{
86d47f12 538 struct gl520_data *data = gl520_update_device(dev);
1da177e4
LT		 539 return sprintf(buf, "%d\n", data->alarms);
540}
541
86d47f12
JD		 542static ssize_t get_beep_enable(struct device *dev, struct device_attribute
543 *attr, char *buf)
1da177e4 544{
86d47f12 545 struct gl520_data *data = gl520_update_device(dev);
1da177e4
LT		 546 return sprintf(buf, "%d\n", data->beep_enable);
547}
548
86d47f12
JD		 549static ssize_t get_beep_mask(struct device *dev, struct device_attribute *attr,
550 char *buf)
1da177e4 551{
86d47f12 552 struct gl520_data *data = gl520_update_device(dev);
1da177e4
LT		 553 return sprintf(buf, "%d\n", data->beep_mask);
554}
555
86d47f12
JD		 556static ssize_t set_beep_enable(struct device *dev, struct device_attribute
557 *attr, const char *buf, size_t count)
1da177e4 558{
86d47f12
JD		 559 struct i2c_client *client = to_i2c_client(dev);
560 struct gl520_data *data = i2c_get_clientdata(client);
43da3d12
GR		 561 u8 r;
562 unsigned long v;
563 int err;
564
565 err = kstrtoul(buf, 10, &v);
566 if (err)
567 return err;
568
569 r = (v ? 0 : 1);
1da177e4 570
9a61bf63 571 mutex_lock(&data->update_lock);
1da177e4 572 data->beep_enable = !r;
86d47f12
JD		 573 gl520_write_value(client, GL520_REG_BEEP_ENABLE,
574 (gl520_read_value(client, GL520_REG_BEEP_ENABLE)
575 & ~0x04) | (r << 2));
9a61bf63 576 mutex_unlock(&data->update_lock);
1da177e4
LT		 577 return count;
578}
579
86d47f12
JD		 580static ssize_t set_beep_mask(struct device *dev, struct device_attribute *attr,
581 const char *buf, size_t count)
1da177e4 582{
86d47f12
JD		 583 struct i2c_client *client = to_i2c_client(dev);
584 struct gl520_data *data = i2c_get_clientdata(client);
43da3d12
GR		 585 unsigned long r;
586 int err;
587
588 err = kstrtoul(buf, 10, &r);
589 if (err)
590 return err;
f28dc2f7 591
9a61bf63 592 mutex_lock(&data->update_lock);
1da177e4
LT		 593 r &= data->alarm_mask;
594 data->beep_mask = r;
86d47f12 595 gl520_write_value(client, GL520_REG_BEEP_MASK, r);
9a61bf63 596 mutex_unlock(&data->update_lock);
1da177e4
LT		 597 return count;
598}
599
86d47f12
JD		 600static DEVICE_ATTR(alarms, S_IRUGO, get_alarms, NULL);
601static DEVICE_ATTR(beep_enable, S_IRUGO | S_IWUSR,
602 get_beep_enable, set_beep_enable);
603static DEVICE_ATTR(beep_mask, S_IRUGO | S_IWUSR,
604 get_beep_mask, set_beep_mask);
605
e86a7760
JD		 606static ssize_t get_alarm(struct device *dev, struct device_attribute *attr,
607 char *buf)
608{
609 int bit_nr = to_sensor_dev_attr(attr)->index;
610 struct gl520_data *data = gl520_update_device(dev);
611
612 return sprintf(buf, "%d\n", (data->alarms >> bit_nr) & 1);
613}
614
615static SENSOR_DEVICE_ATTR(in0_alarm, S_IRUGO, get_alarm, NULL, 0);
616static SENSOR_DEVICE_ATTR(in1_alarm, S_IRUGO, get_alarm, NULL, 1);
617static SENSOR_DEVICE_ATTR(in2_alarm, S_IRUGO, get_alarm, NULL, 2);
618static SENSOR_DEVICE_ATTR(in3_alarm, S_IRUGO, get_alarm, NULL, 3);
619static SENSOR_DEVICE_ATTR(temp1_alarm, S_IRUGO, get_alarm, NULL, 4);
620static SENSOR_DEVICE_ATTR(fan1_alarm, S_IRUGO, get_alarm, NULL, 5);
621static SENSOR_DEVICE_ATTR(fan2_alarm, S_IRUGO, get_alarm, NULL, 6);
622static SENSOR_DEVICE_ATTR(temp2_alarm, S_IRUGO, get_alarm, NULL, 7);
623static SENSOR_DEVICE_ATTR(in4_alarm, S_IRUGO, get_alarm, NULL, 7);
624
625static ssize_t get_beep(struct device *dev, struct device_attribute *attr,
626 char *buf)
627{
628 int bitnr = to_sensor_dev_attr(attr)->index;
629 struct gl520_data *data = gl520_update_device(dev);
630
631 return sprintf(buf, "%d\n", (data->beep_mask >> bitnr) & 1);
632}
633
634static ssize_t set_beep(struct device *dev, struct device_attribute *attr,
635 const char *buf, size_t count)
636{
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;
640 unsigned long bit;
641
43da3d12
GR		 642 int err;
643
644 err = kstrtoul(buf, 10, &bit);
645 if (err)
646 return err;
e86a7760
JD		 647 if (bit & ~1)
648 return -EINVAL;
649
650 mutex_lock(&data->update_lock);
651 data->beep_mask = gl520_read_value(client, GL520_REG_BEEP_MASK);
652 if (bit)
653 data->beep_mask |= (1 << bitnr);
654 else
655 data->beep_mask &= ~(1 << bitnr);
656 gl520_write_value(client, GL520_REG_BEEP_MASK, data->beep_mask);
657 mutex_unlock(&data->update_lock);
658 return count;
659}
660
661static SENSOR_DEVICE_ATTR(in0_beep, S_IRUGO | S_IWUSR, get_beep, set_beep, 0);
662static SENSOR_DEVICE_ATTR(in1_beep, S_IRUGO | S_IWUSR, get_beep, set_beep, 1);
663static SENSOR_DEVICE_ATTR(in2_beep, S_IRUGO | S_IWUSR, get_beep, set_beep, 2);
664static SENSOR_DEVICE_ATTR(in3_beep, S_IRUGO | S_IWUSR, get_beep, set_beep, 3);
665static SENSOR_DEVICE_ATTR(temp1_beep, S_IRUGO | S_IWUSR, get_beep, set_beep, 4);
666static SENSOR_DEVICE_ATTR(fan1_beep, S_IRUGO | S_IWUSR, get_beep, set_beep, 5);
667static SENSOR_DEVICE_ATTR(fan2_beep, S_IRUGO | S_IWUSR, get_beep, set_beep, 6);
668static SENSOR_DEVICE_ATTR(temp2_beep, S_IRUGO | S_IWUSR, get_beep, set_beep, 7);
669static SENSOR_DEVICE_ATTR(in4_beep, S_IRUGO | S_IWUSR, get_beep, set_beep, 7);
670
87808be4
JD		 671static struct attribute *gl520_attributes[] = {
672 &dev_attr_cpu0_vid.attr,
673
86d47f12
JD		 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,
e86a7760
JD		 677 &sensor_dev_attr_in0_alarm.dev_attr.attr,
678 &sensor_dev_attr_in0_beep.dev_attr.attr,
86d47f12
JD		 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,
e86a7760
JD		 682 &sensor_dev_attr_in1_alarm.dev_attr.attr,
683 &sensor_dev_attr_in1_beep.dev_attr.attr,
86d47f12
JD		 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,
e86a7760
JD		 687 &sensor_dev_attr_in2_alarm.dev_attr.attr,
688 &sensor_dev_attr_in2_beep.dev_attr.attr,
86d47f12
JD		 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,
e86a7760
JD		 692 &sensor_dev_attr_in3_alarm.dev_attr.attr,
693 &sensor_dev_attr_in3_beep.dev_attr.attr,
86d47f12
JD		 694
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,
e86a7760
JD		 698 &sensor_dev_attr_fan1_alarm.dev_attr.attr,
699 &sensor_dev_attr_fan1_beep.dev_attr.attr,
87808be4 700 &dev_attr_fan1_off.attr,
86d47f12
JD		 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,
e86a7760
JD		 704 &sensor_dev_attr_fan2_alarm.dev_attr.attr,
705 &sensor_dev_attr_fan2_beep.dev_attr.attr,
87808be4 706
86d47f12
JD		 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,
e86a7760
JD		 710 &sensor_dev_attr_temp1_alarm.dev_attr.attr,
711 &sensor_dev_attr_temp1_beep.dev_attr.attr,
87808be4
JD		 712
713 &dev_attr_alarms.attr,
714 &dev_attr_beep_enable.attr,
715 &dev_attr_beep_mask.attr,
716 NULL
717};
718
719static const struct attribute_group gl520_group = {
720 .attrs = gl520_attributes,
721};
722
f445a9af 723static struct attribute *gl520_attributes_in4[] = {
86d47f12
JD		 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,
e86a7760
JD		 727 &sensor_dev_attr_in4_alarm.dev_attr.attr,
728 &sensor_dev_attr_in4_beep.dev_attr.attr,
f445a9af
GR		 729 NULL
730};
87808be4 731
f445a9af 732static struct attribute *gl520_attributes_temp2[] = {
86d47f12
JD		 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,
e86a7760
JD		 736 &sensor_dev_attr_temp2_alarm.dev_attr.attr,
737 &sensor_dev_attr_temp2_beep.dev_attr.attr,
87808be4
JD		 738 NULL
739};
740
f445a9af
GR		 741static const struct attribute_group gl520_group_in4 = {
742 .attrs = gl520_attributes_in4,
743};
744
745static const struct attribute_group gl520_group_temp2 = {
746 .attrs = gl520_attributes_temp2,
87808be4
JD		 747};
748
1da177e4
LT		 749
750/*
751 * Real code
752 */
753
a23a9fe1 754/* Return 0 if detection is successful, -ENODEV otherwise */
310ec792 755static int gl520_detect(struct i2c_client *client, struct i2c_board_info *info)
1da177e4 756{
a23a9fe1 757 struct i2c_adapter *adapter = client->adapter;
1da177e4
LT		 758
759 if (!i2c_check_functionality(adapter, I2C_FUNC_SMBUS_BYTE_DATA |
760 I2C_FUNC_SMBUS_WORD_DATA))
a23a9fe1 761 return -ENODEV;
1da177e4
LT		 762
763 /* Determine the chip type. */
52df6440
JD		 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");
768 return -ENODEV;
1da177e4
LT		 769 }
770
a23a9fe1 771 strlcpy(info->type, "gl520sm", I2C_NAME_SIZE);
1da177e4 772
a23a9fe1
JD		 773 return 0;
774}
775
776static int gl520_probe(struct i2c_client *client,
777 const struct i2c_device_id *id)
778{
779 struct gl520_data *data;
780 int err;
781
647ff514
GR		 782 data = devm_kzalloc(&client->dev, sizeof(struct gl520_data),
783 GFP_KERNEL);
784 if (!data)
785 return -ENOMEM;
a23a9fe1
JD		 786
787 i2c_set_clientdata(client, data);
788 mutex_init(&data->update_lock);
1da177e4
LT		 789
790 /* Initialize the GL520SM chip */
f28dc2f7 791 gl520_init_client(client);
1da177e4
LT		 792
793 /* Register sysfs hooks */
43da3d12
GR		 794 err = sysfs_create_group(&client->dev.kobj, &gl520_group);
795 if (err)
647ff514 796 return err;
1da177e4 797
f445a9af
GR		 798 if (data->two_temps)
799 err = sysfs_create_group(&client->dev.kobj, &gl520_group_temp2);
800 else
801 err = sysfs_create_group(&client->dev.kobj, &gl520_group_in4);
1da177e4 802
f445a9af
GR		 803 if (err)
804 goto exit_remove_files;
1da177e4 805
f28dc2f7 806 data->hwmon_dev = hwmon_device_register(&client->dev);
1beeffe4
TJ		 807 if (IS_ERR(data->hwmon_dev)) {
808 err = PTR_ERR(data->hwmon_dev);
87808be4
JD		 809 goto exit_remove_files;
810 }
1da177e4
LT		 811
812 return 0;
813
87808be4 814exit_remove_files:
f28dc2f7 815 sysfs_remove_group(&client->dev.kobj, &gl520_group);
f445a9af
GR		 816 sysfs_remove_group(&client->dev.kobj, &gl520_group_in4);
817 sysfs_remove_group(&client->dev.kobj, &gl520_group_temp2);
1da177e4
LT		 818 return err;
819}
820
821
822/* Called when we have found a new GL520SM. */
823static void gl520_init_client(struct i2c_client *client)
824{
825 struct gl520_data *data = i2c_get_clientdata(client);
826 u8 oldconf, conf;
827
828 conf = oldconf = gl520_read_value(client, GL520_REG_CONF);
829
830 data->alarm_mask = 0xff;
303760b4 831 data->vrm = vid_which_vrm();
1da177e4
LT		 832
833 if (extra_sensor_type == 1)
834 conf &= ~0x10;
835 else if (extra_sensor_type == 2)
836 conf |= 0x10;
837 data->two_temps = !(conf & 0x10);
838
839 /* If IRQ# is disabled, we can safely force comparator mode */
840 if (!(conf & 0x20))
841 conf &= 0xf7;
842
843 /* Enable monitoring if needed */
844 conf |= 0x40;
845
846 if (conf != oldconf)
847 gl520_write_value(client, GL520_REG_CONF, conf);
848
849 gl520_update_device(&(client->dev));
850
851 if (data->fan_min[0] == 0)
852 data->alarm_mask &= ~0x20;
853 if (data->fan_min[1] == 0)
854 data->alarm_mask &= ~0x40;
855
856 data->beep_mask &= data->alarm_mask;
857 gl520_write_value(client, GL520_REG_BEEP_MASK, data->beep_mask);
858}
859
a23a9fe1 860static int gl520_remove(struct i2c_client *client)
1da177e4 861{
943b0830 862 struct gl520_data *data = i2c_get_clientdata(client);
1da177e4 863
1beeffe4 864 hwmon_device_unregister(data->hwmon_dev);
87808be4 865 sysfs_remove_group(&client->dev.kobj, &gl520_group);
f445a9af
GR		 866 sysfs_remove_group(&client->dev.kobj, &gl520_group_in4);
867 sysfs_remove_group(&client->dev.kobj, &gl520_group_temp2);
943b0830 868
1da177e4
LT		 869 return 0;
870}
871
872
43da3d12
GR		 873/*
874 * Registers 0x07 to 0x0c are word-sized, others are byte-sized
875 * GL520 uses a high-byte first convention
876 */
1da177e4
LT		 877static int gl520_read_value(struct i2c_client *client, u8 reg)
878{
879 if ((reg >= 0x07) && (reg <= 0x0c))
90f4102c 880 return i2c_smbus_read_word_swapped(client, reg);
1da177e4
LT		 881 else
882 return i2c_smbus_read_byte_data(client, reg);
883}
884
885static int gl520_write_value(struct i2c_client *client, u8 reg, u16 value)
886{
887 if ((reg >= 0x07) && (reg <= 0x0c))
90f4102c 888 return i2c_smbus_write_word_swapped(client, reg, value);
1da177e4
LT		 889 else
890 return i2c_smbus_write_byte_data(client, reg, value);
891}
892
893
894static struct gl520_data *gl520_update_device(struct device *dev)
895{
896 struct i2c_client *client = to_i2c_client(dev);
897 struct gl520_data *data = i2c_get_clientdata(client);
8b4b0ab4 898 int val, i;
1da177e4 899
9a61bf63 900 mutex_lock(&data->update_lock);
1da177e4 901
0cacdf29 902 if (time_after(jiffies, data->last_updated + 2 * HZ) || !data->valid) {
1da177e4
LT		 903
904 dev_dbg(&client->dev, "Starting gl520sm update\n");
905
906 data->alarms = gl520_read_value(client, GL520_REG_ALARMS);
907 data->beep_mask = gl520_read_value(client, GL520_REG_BEEP_MASK);
43da3d12
GR		 908 data->vid = gl520_read_value(client,
909 GL520_REG_VID_INPUT) & 0x1f;
1da177e4 910
8b4b0ab4
JD		 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;
917 }
1da177e4
LT		 918
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;
922
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;
926
8b4b0ab4
JD		 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]);
1da177e4
LT		 933
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;
938
939 data->alarms &= data->alarm_mask;
940
941 val = gl520_read_value(client, GL520_REG_CONF);
942 data->beep_enable = !((val >> 2) & 1);
943
1da177e4
LT		 944 /* Temp1 and Vin4 are the same input */
945 if (data->two_temps) {
8b4b0ab4
JD		 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]);
1da177e4 952 } else {
8b4b0ab4
JD		 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]);
1da177e4
LT		 959 }
960
961 data->last_updated = jiffies;
962 data->valid = 1;
963 }
964
9a61bf63 965 mutex_unlock(&data->update_lock);
1da177e4
LT		 966
967 return data;
968}
969
f0967eea 970module_i2c_driver(gl520_driver);
1da177e4
LT		 971
972MODULE_AUTHOR("Frodo Looijaard <frodol@dds.nl>, "
96de0e25 973 "Kyösti Mälkki <kmalkki@cc.hut.fi>, "
1da177e4
LT		 974 "Maarten Deprez <maartendeprez@users.sourceforge.net>");
975MODULE_DESCRIPTION("GL520SM driver");
976MODULE_LICENSE("GPL");
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