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Merge tag 'v3.10.90' into update
[GitHub/mt8127/android_kernel_alcatel_ttab.git] / drivers / hwmon / gl520sm.c
CommitLineData
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 146#define VDD_FROM_REG(val) (((val) * 95 + 2) / 4)
2a844c14 147#define VDD_TO_REG(val) clamp_val((((val) * 4 + 47) / 95), 0, 255)
1da177e4 148
43da3d12 149#define IN_FROM_REG(val) ((val) * 19)
2a844c14 150#define IN_TO_REG(val) clamp_val((((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 : \
2a844c14 288 clamp_val((480000 + ((val) << ((div)-1))) / ((val) << (div)), 1, 255))
1da177e4 289
86d47f12
JD		 290static ssize_t get_fan_input(struct device *dev, struct device_attribute *attr,
291 char *buf)
1da177e4 292{
86d47f12
JD		 293 int n = to_sensor_dev_attr(attr)->index;
294 struct gl520_data *data = gl520_update_device(dev);
295
296 return sprintf(buf, "%d\n", FAN_FROM_REG(data->fan_input[n],
297 data->fan_div[n]));
1da177e4
LT		 298}
299
86d47f12
JD		 300static ssize_t get_fan_min(struct device *dev, struct device_attribute *attr,
301 char *buf)
1da177e4 302{
86d47f12
JD		 303 int n = to_sensor_dev_attr(attr)->index;
304 struct gl520_data *data = gl520_update_device(dev);
305
306 return sprintf(buf, "%d\n", FAN_FROM_REG(data->fan_min[n],
307 data->fan_div[n]));
1da177e4
LT		 308}
309
86d47f12
JD		 310static ssize_t get_fan_div(struct device *dev, struct device_attribute *attr,
311 char *buf)
1da177e4 312{
86d47f12
JD		 313 int n = to_sensor_dev_attr(attr)->index;
314 struct gl520_data *data = gl520_update_device(dev);
315
316 return sprintf(buf, "%d\n", DIV_FROM_REG(data->fan_div[n]));
1da177e4
LT		 317}
318
86d47f12
JD		 319static ssize_t get_fan_off(struct device *dev, struct device_attribute *attr,
320 char *buf)
1da177e4 321{
86d47f12 322 struct gl520_data *data = gl520_update_device(dev);
1da177e4
LT		 323 return sprintf(buf, "%d\n", data->fan_off);
324}
325
86d47f12
JD		 326static ssize_t set_fan_min(struct device *dev, struct device_attribute *attr,
327 const char *buf, size_t count)
1da177e4 328{
86d47f12
JD		 329 struct i2c_client *client = to_i2c_client(dev);
330 struct gl520_data *data = i2c_get_clientdata(client);
331 int n = to_sensor_dev_attr(attr)->index;
1da177e4 332 u8 r;
43da3d12
GR		 333 unsigned long v;
334 int err;
335
336 err = kstrtoul(buf, 10, &v);
337 if (err)
338 return err;
1da177e4 339
9a61bf63 340 mutex_lock(&data->update_lock);
86d47f12
JD		 341 r = FAN_TO_REG(v, data->fan_div[n]);
342 data->fan_min[n] = r;
1da177e4 343
86d47f12
JD		 344 if (n == 0)
345 gl520_write_value(client, GL520_REG_FAN_MIN,
346 (gl520_read_value(client, GL520_REG_FAN_MIN)
347 & ~0xff00) | (r << 8));
1da177e4 348 else
86d47f12
JD		 349 gl520_write_value(client, GL520_REG_FAN_MIN,
350 (gl520_read_value(client, GL520_REG_FAN_MIN)
351 & ~0xff) | r);
1da177e4
LT		 352
353 data->beep_mask = gl520_read_value(client, GL520_REG_BEEP_MASK);
86d47f12
JD		 354 if (data->fan_min[n] == 0)
355 data->alarm_mask &= (n == 0) ? ~0x20 : ~0x40;
1da177e4 356 else
86d47f12 357 data->alarm_mask |= (n == 0) ? 0x20 : 0x40;
1da177e4
LT		 358 data->beep_mask &= data->alarm_mask;
359 gl520_write_value(client, GL520_REG_BEEP_MASK, data->beep_mask);
360
9a61bf63 361 mutex_unlock(&data->update_lock);
1da177e4
LT		 362 return count;
363}
364
86d47f12
JD		 365static ssize_t set_fan_div(struct device *dev, struct device_attribute *attr,
366 const char *buf, size_t count)
1da177e4 367{
86d47f12
JD		 368 struct i2c_client *client = to_i2c_client(dev);
369 struct gl520_data *data = i2c_get_clientdata(client);
370 int n = to_sensor_dev_attr(attr)->index;
1da177e4 371 u8 r;
43da3d12
GR		 372 unsigned long v;
373 int err;
374
375 err = kstrtoul(buf, 10, &v);
376 if (err)
377 return err;
1da177e4
LT		 378
379 switch (v) {
43da3d12
GR		 380 case 1:
381 r = 0;
382 break;
383 case 2:
384 r = 1;
385 break;
386 case 4:
387 r = 2;
388 break;
389 case 8:
390 r = 3;
391 break;
1da177e4 392 default:
43da3d12
GR		 393 dev_err(&client->dev,
394 "fan_div value %ld not supported. Choose one of 1, 2, 4 or 8!\n", v);
1da177e4
LT		 395 return -EINVAL;
396 }
397
9a61bf63 398 mutex_lock(&data->update_lock);
86d47f12 399 data->fan_div[n] = r;
1da177e4 400
86d47f12
JD		 401 if (n == 0)
402 gl520_write_value(client, GL520_REG_FAN_DIV,
403 (gl520_read_value(client, GL520_REG_FAN_DIV)
404 & ~0xc0) | (r << 6));
1da177e4 405 else
86d47f12
JD		 406 gl520_write_value(client, GL520_REG_FAN_DIV,
407 (gl520_read_value(client, GL520_REG_FAN_DIV)
408 & ~0x30) | (r << 4));
1da177e4 409
9a61bf63 410 mutex_unlock(&data->update_lock);
1da177e4
LT		 411 return count;
412}
413
86d47f12
JD		 414static ssize_t set_fan_off(struct device *dev, struct device_attribute *attr,
415 const char *buf, size_t count)
1da177e4 416{
86d47f12
JD		 417 struct i2c_client *client = to_i2c_client(dev);
418 struct gl520_data *data = i2c_get_clientdata(client);
43da3d12
GR		 419 u8 r;
420 unsigned long v;
421 int err;
422
423 err = kstrtoul(buf, 10, &v);
424 if (err)
425 return err;
426
427 r = (v ? 1 : 0);
1da177e4 428
9a61bf63 429 mutex_lock(&data->update_lock);
1da177e4 430 data->fan_off = r;
86d47f12
JD		 431 gl520_write_value(client, GL520_REG_FAN_OFF,
432 (gl520_read_value(client, GL520_REG_FAN_OFF)
433 & ~0x0c) | (r << 2));
9a61bf63 434 mutex_unlock(&data->update_lock);
1da177e4
LT		 435 return count;
436}
437
86d47f12
JD		 438static SENSOR_DEVICE_ATTR(fan1_input, S_IRUGO, get_fan_input, NULL, 0);
439static SENSOR_DEVICE_ATTR(fan2_input, S_IRUGO, get_fan_input, NULL, 1);
440static SENSOR_DEVICE_ATTR(fan1_min, S_IRUGO | S_IWUSR,
441 get_fan_min, set_fan_min, 0);
442static SENSOR_DEVICE_ATTR(fan2_min, S_IRUGO | S_IWUSR,
443 get_fan_min, set_fan_min, 1);
444static SENSOR_DEVICE_ATTR(fan1_div, S_IRUGO | S_IWUSR,
445 get_fan_div, set_fan_div, 0);
446static SENSOR_DEVICE_ATTR(fan2_div, S_IRUGO | S_IWUSR,
447 get_fan_div, set_fan_div, 1);
448static DEVICE_ATTR(fan1_off, S_IRUGO | S_IWUSR,
449 get_fan_off, set_fan_off);
450
1da177e4 451#define TEMP_FROM_REG(val) (((val) - 130) * 1000)
2a844c14 452#define TEMP_TO_REG(val) clamp_val(((((val) < 0 ? \
43da3d12 453 (val) - 500 : (val) + 500) / 1000) + 130), 0, 255)
1da177e4 454
86d47f12
JD		 455static ssize_t get_temp_input(struct device *dev, struct device_attribute *attr,
456 char *buf)
1da177e4 457{
86d47f12
JD		 458 int n = to_sensor_dev_attr(attr)->index;
459 struct gl520_data *data = gl520_update_device(dev);
460
461 return sprintf(buf, "%d\n", TEMP_FROM_REG(data->temp_input[n]));
1da177e4
LT		 462}
463
86d47f12
JD		 464static ssize_t get_temp_max(struct device *dev, struct device_attribute *attr,
465 char *buf)
1da177e4 466{
86d47f12
JD		 467 int n = to_sensor_dev_attr(attr)->index;
468 struct gl520_data *data = gl520_update_device(dev);
469
470 return sprintf(buf, "%d\n", TEMP_FROM_REG(data->temp_max[n]));
1da177e4
LT		 471}
472
43da3d12
GR		 473static ssize_t get_temp_max_hyst(struct device *dev,
474 struct device_attribute *attr, char *buf)
1da177e4 475{
86d47f12
JD		 476 int n = to_sensor_dev_attr(attr)->index;
477 struct gl520_data *data = gl520_update_device(dev);
478
479 return sprintf(buf, "%d\n", TEMP_FROM_REG(data->temp_max_hyst[n]));
1da177e4
LT		 480}
481
86d47f12
JD		 482static ssize_t set_temp_max(struct device *dev, struct device_attribute *attr,
483 const char *buf, size_t count)
1da177e4 484{
86d47f12
JD		 485 struct i2c_client *client = to_i2c_client(dev);
486 struct gl520_data *data = i2c_get_clientdata(client);
487 int n = to_sensor_dev_attr(attr)->index;
43da3d12
GR		 488 long v;
489 int err;
490
491 err = kstrtol(buf, 10, &v);
492 if (err)
493 return err;
1da177e4 494
9a61bf63 495 mutex_lock(&data->update_lock);
86d47f12
JD		 496 data->temp_max[n] = TEMP_TO_REG(v);
497 gl520_write_value(client, GL520_REG_TEMP_MAX[n], data->temp_max[n]);
9a61bf63 498 mutex_unlock(&data->update_lock);
1da177e4
LT		 499 return count;
500}
501
86d47f12
JD		 502static ssize_t set_temp_max_hyst(struct device *dev, struct device_attribute
503 *attr, const char *buf, size_t count)
1da177e4 504{
86d47f12
JD		 505 struct i2c_client *client = to_i2c_client(dev);
506 struct gl520_data *data = i2c_get_clientdata(client);
507 int n = to_sensor_dev_attr(attr)->index;
43da3d12
GR		 508 long v;
509 int err;
510
511 err = kstrtol(buf, 10, &v);
512 if (err)
513 return err;
1da177e4 514
9a61bf63 515 mutex_lock(&data->update_lock);
86d47f12
JD		 516 data->temp_max_hyst[n] = TEMP_TO_REG(v);
517 gl520_write_value(client, GL520_REG_TEMP_MAX_HYST[n],
518 data->temp_max_hyst[n]);
9a61bf63 519 mutex_unlock(&data->update_lock);
1da177e4
LT		 520 return count;
521}
522
86d47f12
JD		 523static SENSOR_DEVICE_ATTR(temp1_input, S_IRUGO, get_temp_input, NULL, 0);
524static SENSOR_DEVICE_ATTR(temp2_input, S_IRUGO, get_temp_input, NULL, 1);
525static SENSOR_DEVICE_ATTR(temp1_max, S_IRUGO | S_IWUSR,
526 get_temp_max, set_temp_max, 0);
527static SENSOR_DEVICE_ATTR(temp2_max, S_IRUGO | S_IWUSR,
528 get_temp_max, set_temp_max, 1);
529static SENSOR_DEVICE_ATTR(temp1_max_hyst, S_IRUGO | S_IWUSR,
530 get_temp_max_hyst, set_temp_max_hyst, 0);
531static SENSOR_DEVICE_ATTR(temp2_max_hyst, S_IRUGO | S_IWUSR,
532 get_temp_max_hyst, set_temp_max_hyst, 1);
533
534static ssize_t get_alarms(struct device *dev, struct device_attribute *attr,
535 char *buf)
1da177e4 536{
86d47f12 537 struct gl520_data *data = gl520_update_device(dev);
1da177e4
LT		 538 return sprintf(buf, "%d\n", data->alarms);
539}
540
86d47f12
JD		 541static ssize_t get_beep_enable(struct device *dev, struct device_attribute
542 *attr, char *buf)
1da177e4 543{
86d47f12 544 struct gl520_data *data = gl520_update_device(dev);
1da177e4
LT		 545 return sprintf(buf, "%d\n", data->beep_enable);
546}
547
86d47f12
JD		 548static ssize_t get_beep_mask(struct device *dev, struct device_attribute *attr,
549 char *buf)
1da177e4 550{
86d47f12 551 struct gl520_data *data = gl520_update_device(dev);
1da177e4
LT		 552 return sprintf(buf, "%d\n", data->beep_mask);
553}
554
86d47f12
JD		 555static ssize_t set_beep_enable(struct device *dev, struct device_attribute
556 *attr, const char *buf, size_t count)
1da177e4 557{
86d47f12
JD		 558 struct i2c_client *client = to_i2c_client(dev);
559 struct gl520_data *data = i2c_get_clientdata(client);
43da3d12
GR		 560 u8 r;
561 unsigned long v;
562 int err;
563
564 err = kstrtoul(buf, 10, &v);
565 if (err)
566 return err;
567
568 r = (v ? 0 : 1);
1da177e4 569
9a61bf63 570 mutex_lock(&data->update_lock);
1da177e4 571 data->beep_enable = !r;
86d47f12
JD		 572 gl520_write_value(client, GL520_REG_BEEP_ENABLE,
573 (gl520_read_value(client, GL520_REG_BEEP_ENABLE)
574 & ~0x04) | (r << 2));
9a61bf63 575 mutex_unlock(&data->update_lock);
1da177e4
LT		 576 return count;
577}
578
86d47f12
JD		 579static ssize_t set_beep_mask(struct device *dev, struct device_attribute *attr,
580 const char *buf, size_t count)
1da177e4 581{
86d47f12
JD		 582 struct i2c_client *client = to_i2c_client(dev);
583 struct gl520_data *data = i2c_get_clientdata(client);
43da3d12
GR		 584 unsigned long r;
585 int err;
586
587 err = kstrtoul(buf, 10, &r);
588 if (err)
589 return err;
f28dc2f7 590
9a61bf63 591 mutex_lock(&data->update_lock);
1da177e4
LT		 592 r &= data->alarm_mask;
593 data->beep_mask = r;
86d47f12 594 gl520_write_value(client, GL520_REG_BEEP_MASK, r);
9a61bf63 595 mutex_unlock(&data->update_lock);
1da177e4
LT		 596 return count;
597}
598
86d47f12
JD		 599static DEVICE_ATTR(alarms, S_IRUGO, get_alarms, NULL);
600static DEVICE_ATTR(beep_enable, S_IRUGO | S_IWUSR,
601 get_beep_enable, set_beep_enable);
602static DEVICE_ATTR(beep_mask, S_IRUGO | S_IWUSR,
603 get_beep_mask, set_beep_mask);
604
e86a7760
JD		 605static ssize_t get_alarm(struct device *dev, struct device_attribute *attr,
606 char *buf)
607{
608 int bit_nr = to_sensor_dev_attr(attr)->index;
609 struct gl520_data *data = gl520_update_device(dev);
610
611 return sprintf(buf, "%d\n", (data->alarms >> bit_nr) & 1);
612}
613
614static SENSOR_DEVICE_ATTR(in0_alarm, S_IRUGO, get_alarm, NULL, 0);
615static SENSOR_DEVICE_ATTR(in1_alarm, S_IRUGO, get_alarm, NULL, 1);
616static SENSOR_DEVICE_ATTR(in2_alarm, S_IRUGO, get_alarm, NULL, 2);
617static SENSOR_DEVICE_ATTR(in3_alarm, S_IRUGO, get_alarm, NULL, 3);
618static SENSOR_DEVICE_ATTR(temp1_alarm, S_IRUGO, get_alarm, NULL, 4);
619static SENSOR_DEVICE_ATTR(fan1_alarm, S_IRUGO, get_alarm, NULL, 5);
620static SENSOR_DEVICE_ATTR(fan2_alarm, S_IRUGO, get_alarm, NULL, 6);
621static SENSOR_DEVICE_ATTR(temp2_alarm, S_IRUGO, get_alarm, NULL, 7);
622static SENSOR_DEVICE_ATTR(in4_alarm, S_IRUGO, get_alarm, NULL, 7);
623
624static ssize_t get_beep(struct device *dev, struct device_attribute *attr,
625 char *buf)
626{
627 int bitnr = to_sensor_dev_attr(attr)->index;
628 struct gl520_data *data = gl520_update_device(dev);
629
630 return sprintf(buf, "%d\n", (data->beep_mask >> bitnr) & 1);
631}
632
633static ssize_t set_beep(struct device *dev, struct device_attribute *attr,
634 const char *buf, size_t count)
635{
636 struct i2c_client *client = to_i2c_client(dev);
637 struct gl520_data *data = i2c_get_clientdata(client);
638 int bitnr = to_sensor_dev_attr(attr)->index;
639 unsigned long bit;
640
43da3d12
GR		 641 int err;
642
643 err = kstrtoul(buf, 10, &bit);
644 if (err)
645 return err;
e86a7760
JD		 646 if (bit & ~1)
647 return -EINVAL;
648
649 mutex_lock(&data->update_lock);
650 data->beep_mask = gl520_read_value(client, GL520_REG_BEEP_MASK);
651 if (bit)
652 data->beep_mask |= (1 << bitnr);
653 else
654 data->beep_mask &= ~(1 << bitnr);
655 gl520_write_value(client, GL520_REG_BEEP_MASK, data->beep_mask);
656 mutex_unlock(&data->update_lock);
657 return count;
658}
659
660static SENSOR_DEVICE_ATTR(in0_beep, S_IRUGO | S_IWUSR, get_beep, set_beep, 0);
661static SENSOR_DEVICE_ATTR(in1_beep, S_IRUGO | S_IWUSR, get_beep, set_beep, 1);
662static SENSOR_DEVICE_ATTR(in2_beep, S_IRUGO | S_IWUSR, get_beep, set_beep, 2);
663static SENSOR_DEVICE_ATTR(in3_beep, S_IRUGO | S_IWUSR, get_beep, set_beep, 3);
664static SENSOR_DEVICE_ATTR(temp1_beep, S_IRUGO | S_IWUSR, get_beep, set_beep, 4);
665static SENSOR_DEVICE_ATTR(fan1_beep, S_IRUGO | S_IWUSR, get_beep, set_beep, 5);
666static SENSOR_DEVICE_ATTR(fan2_beep, S_IRUGO | S_IWUSR, get_beep, set_beep, 6);
667static SENSOR_DEVICE_ATTR(temp2_beep, S_IRUGO | S_IWUSR, get_beep, set_beep, 7);
668static SENSOR_DEVICE_ATTR(in4_beep, S_IRUGO | S_IWUSR, get_beep, set_beep, 7);
669
87808be4
JD		 670static struct attribute *gl520_attributes[] = {
671 &dev_attr_cpu0_vid.attr,
672
86d47f12
JD		 673 &sensor_dev_attr_in0_input.dev_attr.attr,
674 &sensor_dev_attr_in0_min.dev_attr.attr,
675 &sensor_dev_attr_in0_max.dev_attr.attr,
e86a7760
JD		 676 &sensor_dev_attr_in0_alarm.dev_attr.attr,
677 &sensor_dev_attr_in0_beep.dev_attr.attr,
86d47f12
JD		 678 &sensor_dev_attr_in1_input.dev_attr.attr,
679 &sensor_dev_attr_in1_min.dev_attr.attr,
680 &sensor_dev_attr_in1_max.dev_attr.attr,
e86a7760
JD		 681 &sensor_dev_attr_in1_alarm.dev_attr.attr,
682 &sensor_dev_attr_in1_beep.dev_attr.attr,
86d47f12
JD		 683 &sensor_dev_attr_in2_input.dev_attr.attr,
684 &sensor_dev_attr_in2_min.dev_attr.attr,
685 &sensor_dev_attr_in2_max.dev_attr.attr,
e86a7760
JD		 686 &sensor_dev_attr_in2_alarm.dev_attr.attr,
687 &sensor_dev_attr_in2_beep.dev_attr.attr,
86d47f12
JD		 688 &sensor_dev_attr_in3_input.dev_attr.attr,
689 &sensor_dev_attr_in3_min.dev_attr.attr,
690 &sensor_dev_attr_in3_max.dev_attr.attr,
e86a7760
JD		 691 &sensor_dev_attr_in3_alarm.dev_attr.attr,
692 &sensor_dev_attr_in3_beep.dev_attr.attr,
86d47f12
JD		 693
694 &sensor_dev_attr_fan1_input.dev_attr.attr,
695 &sensor_dev_attr_fan1_min.dev_attr.attr,
696 &sensor_dev_attr_fan1_div.dev_attr.attr,
e86a7760
JD		 697 &sensor_dev_attr_fan1_alarm.dev_attr.attr,
698 &sensor_dev_attr_fan1_beep.dev_attr.attr,
87808be4 699 &dev_attr_fan1_off.attr,
86d47f12
JD		 700 &sensor_dev_attr_fan2_input.dev_attr.attr,
701 &sensor_dev_attr_fan2_min.dev_attr.attr,
702 &sensor_dev_attr_fan2_div.dev_attr.attr,
e86a7760
JD		 703 &sensor_dev_attr_fan2_alarm.dev_attr.attr,
704 &sensor_dev_attr_fan2_beep.dev_attr.attr,
87808be4 705
86d47f12
JD		 706 &sensor_dev_attr_temp1_input.dev_attr.attr,
707 &sensor_dev_attr_temp1_max.dev_attr.attr,
708 &sensor_dev_attr_temp1_max_hyst.dev_attr.attr,
e86a7760
JD		 709 &sensor_dev_attr_temp1_alarm.dev_attr.attr,
710 &sensor_dev_attr_temp1_beep.dev_attr.attr,
87808be4
JD		 711
712 &dev_attr_alarms.attr,
713 &dev_attr_beep_enable.attr,
714 &dev_attr_beep_mask.attr,
715 NULL
716};
717
718static const struct attribute_group gl520_group = {
719 .attrs = gl520_attributes,
720};
721
f445a9af 722static struct attribute *gl520_attributes_in4[] = {
86d47f12
JD		 723 &sensor_dev_attr_in4_input.dev_attr.attr,
724 &sensor_dev_attr_in4_min.dev_attr.attr,
725 &sensor_dev_attr_in4_max.dev_attr.attr,
e86a7760
JD		 726 &sensor_dev_attr_in4_alarm.dev_attr.attr,
727 &sensor_dev_attr_in4_beep.dev_attr.attr,
f445a9af
GR		 728 NULL
729};
87808be4 730
f445a9af 731static struct attribute *gl520_attributes_temp2[] = {
86d47f12
JD		 732 &sensor_dev_attr_temp2_input.dev_attr.attr,
733 &sensor_dev_attr_temp2_max.dev_attr.attr,
734 &sensor_dev_attr_temp2_max_hyst.dev_attr.attr,
e86a7760
JD		 735 &sensor_dev_attr_temp2_alarm.dev_attr.attr,
736 &sensor_dev_attr_temp2_beep.dev_attr.attr,
87808be4
JD		 737 NULL
738};
739
f445a9af
GR		 740static const struct attribute_group gl520_group_in4 = {
741 .attrs = gl520_attributes_in4,
742};
743
744static const struct attribute_group gl520_group_temp2 = {
745 .attrs = gl520_attributes_temp2,
87808be4
JD		 746};
747
1da177e4
LT		 748
749/*
750 * Real code
751 */
752
a23a9fe1 753/* Return 0 if detection is successful, -ENODEV otherwise */
310ec792 754static int gl520_detect(struct i2c_client *client, struct i2c_board_info *info)
1da177e4 755{
a23a9fe1 756 struct i2c_adapter *adapter = client->adapter;
1da177e4
LT		 757
758 if (!i2c_check_functionality(adapter, I2C_FUNC_SMBUS_BYTE_DATA |
759 I2C_FUNC_SMBUS_WORD_DATA))
a23a9fe1 760 return -ENODEV;
1da177e4
LT		 761
762 /* Determine the chip type. */
52df6440
JD		 763 if ((gl520_read_value(client, GL520_REG_CHIP_ID) != 0x20) ||
764 ((gl520_read_value(client, GL520_REG_REVISION) & 0x7f) != 0x00) ||
765 ((gl520_read_value(client, GL520_REG_CONF) & 0x80) != 0x00)) {
766 dev_dbg(&client->dev, "Unknown chip type, skipping\n");
767 return -ENODEV;
1da177e4
LT		 768 }
769
a23a9fe1 770 strlcpy(info->type, "gl520sm", I2C_NAME_SIZE);
1da177e4 771
a23a9fe1
JD		 772 return 0;
773}
774
775static int gl520_probe(struct i2c_client *client,
776 const struct i2c_device_id *id)
777{
778 struct gl520_data *data;
779 int err;
780
647ff514
GR		 781 data = devm_kzalloc(&client->dev, sizeof(struct gl520_data),
782 GFP_KERNEL);
783 if (!data)
784 return -ENOMEM;
a23a9fe1
JD		 785
786 i2c_set_clientdata(client, data);
787 mutex_init(&data->update_lock);
1da177e4
LT		 788
789 /* Initialize the GL520SM chip */
f28dc2f7 790 gl520_init_client(client);
1da177e4
LT		 791
792 /* Register sysfs hooks */
43da3d12
GR		 793 err = sysfs_create_group(&client->dev.kobj, &gl520_group);
794 if (err)
647ff514 795 return err;
1da177e4 796
f445a9af
GR		 797 if (data->two_temps)
798 err = sysfs_create_group(&client->dev.kobj, &gl520_group_temp2);
799 else
800 err = sysfs_create_group(&client->dev.kobj, &gl520_group_in4);
1da177e4 801
f445a9af
GR		 802 if (err)
803 goto exit_remove_files;
1da177e4 804
f28dc2f7 805 data->hwmon_dev = hwmon_device_register(&client->dev);
1beeffe4
TJ		 806 if (IS_ERR(data->hwmon_dev)) {
807 err = PTR_ERR(data->hwmon_dev);
87808be4
JD		 808 goto exit_remove_files;
809 }
1da177e4
LT		 810
811 return 0;
812
87808be4 813exit_remove_files:
f28dc2f7 814 sysfs_remove_group(&client->dev.kobj, &gl520_group);
f445a9af
GR		 815 sysfs_remove_group(&client->dev.kobj, &gl520_group_in4);
816 sysfs_remove_group(&client->dev.kobj, &gl520_group_temp2);
1da177e4
LT		 817 return err;
818}
819
820
821/* Called when we have found a new GL520SM. */
822static void gl520_init_client(struct i2c_client *client)
823{
824 struct gl520_data *data = i2c_get_clientdata(client);
825 u8 oldconf, conf;
826
827 conf = oldconf = gl520_read_value(client, GL520_REG_CONF);
828
829 data->alarm_mask = 0xff;
303760b4 830 data->vrm = vid_which_vrm();
1da177e4
LT		 831
832 if (extra_sensor_type == 1)
833 conf &= ~0x10;
834 else if (extra_sensor_type == 2)
835 conf |= 0x10;
836 data->two_temps = !(conf & 0x10);
837
838 /* If IRQ# is disabled, we can safely force comparator mode */
839 if (!(conf & 0x20))
840 conf &= 0xf7;
841
842 /* Enable monitoring if needed */
843 conf |= 0x40;
844
845 if (conf != oldconf)
846 gl520_write_value(client, GL520_REG_CONF, conf);
847
848 gl520_update_device(&(client->dev));
849
850 if (data->fan_min[0] == 0)
851 data->alarm_mask &= ~0x20;
852 if (data->fan_min[1] == 0)
853 data->alarm_mask &= ~0x40;
854
855 data->beep_mask &= data->alarm_mask;
856 gl520_write_value(client, GL520_REG_BEEP_MASK, data->beep_mask);
857}
858
a23a9fe1 859static int gl520_remove(struct i2c_client *client)
1da177e4 860{
943b0830 861 struct gl520_data *data = i2c_get_clientdata(client);
1da177e4 862
1beeffe4 863 hwmon_device_unregister(data->hwmon_dev);
87808be4 864 sysfs_remove_group(&client->dev.kobj, &gl520_group);
f445a9af
GR		 865 sysfs_remove_group(&client->dev.kobj, &gl520_group_in4);
866 sysfs_remove_group(&client->dev.kobj, &gl520_group_temp2);
943b0830 867
1da177e4
LT		 868 return 0;
869}
870
871
43da3d12
GR		 872/*
873 * Registers 0x07 to 0x0c are word-sized, others are byte-sized
874 * GL520 uses a high-byte first convention
875 */
1da177e4
LT		 876static int gl520_read_value(struct i2c_client *client, u8 reg)
877{
878 if ((reg >= 0x07) && (reg <= 0x0c))
90f4102c 879 return i2c_smbus_read_word_swapped(client, reg);
1da177e4
LT		 880 else
881 return i2c_smbus_read_byte_data(client, reg);
882}
883
884static int gl520_write_value(struct i2c_client *client, u8 reg, u16 value)
885{
886 if ((reg >= 0x07) && (reg <= 0x0c))
90f4102c 887 return i2c_smbus_write_word_swapped(client, reg, value);
1da177e4
LT		 888 else
889 return i2c_smbus_write_byte_data(client, reg, value);
890}
891
892
893static struct gl520_data *gl520_update_device(struct device *dev)
894{
895 struct i2c_client *client = to_i2c_client(dev);
896 struct gl520_data *data = i2c_get_clientdata(client);
8b4b0ab4 897 int val, i;
1da177e4 898
9a61bf63 899 mutex_lock(&data->update_lock);
1da177e4 900
0cacdf29 901 if (time_after(jiffies, data->last_updated + 2 * HZ) || !data->valid) {
1da177e4
LT		 902
903 dev_dbg(&client->dev, "Starting gl520sm update\n");
904
905 data->alarms = gl520_read_value(client, GL520_REG_ALARMS);
906 data->beep_mask = gl520_read_value(client, GL520_REG_BEEP_MASK);
43da3d12
GR		 907 data->vid = gl520_read_value(client,
908 GL520_REG_VID_INPUT) & 0x1f;
1da177e4 909
8b4b0ab4
JD		 910 for (i = 0; i < 4; i++) {
911 data->in_input[i] = gl520_read_value(client,
912 GL520_REG_IN_INPUT[i]);
913 val = gl520_read_value(client, GL520_REG_IN_LIMIT[i]);
914 data->in_min[i] = val & 0xff;
915 data->in_max[i] = (val >> 8) & 0xff;
916 }
1da177e4
LT		 917
918 val = gl520_read_value(client, GL520_REG_FAN_INPUT);
919 data->fan_input[0] = (val >> 8) & 0xff;
920 data->fan_input[1] = val & 0xff;
921
922 val = gl520_read_value(client, GL520_REG_FAN_MIN);
923 data->fan_min[0] = (val >> 8) & 0xff;
924 data->fan_min[1] = val & 0xff;
925
8b4b0ab4
JD		 926 data->temp_input[0] = gl520_read_value(client,
927 GL520_REG_TEMP_INPUT[0]);
928 data->temp_max[0] = gl520_read_value(client,
929 GL520_REG_TEMP_MAX[0]);
930 data->temp_max_hyst[0] = gl520_read_value(client,
931 GL520_REG_TEMP_MAX_HYST[0]);
1da177e4
LT		 932
933 val = gl520_read_value(client, GL520_REG_FAN_DIV);
934 data->fan_div[0] = (val >> 6) & 0x03;
935 data->fan_div[1] = (val >> 4) & 0x03;
936 data->fan_off = (val >> 2) & 0x01;
937
938 data->alarms &= data->alarm_mask;
939
940 val = gl520_read_value(client, GL520_REG_CONF);
941 data->beep_enable = !((val >> 2) & 1);
942
1da177e4
LT		 943 /* Temp1 and Vin4 are the same input */
944 if (data->two_temps) {
8b4b0ab4
JD		 945 data->temp_input[1] = gl520_read_value(client,
946 GL520_REG_TEMP_INPUT[1]);
947 data->temp_max[1] = gl520_read_value(client,
948 GL520_REG_TEMP_MAX[1]);
949 data->temp_max_hyst[1] = gl520_read_value(client,
950 GL520_REG_TEMP_MAX_HYST[1]);
1da177e4 951 } else {
8b4b0ab4
JD		 952 data->in_input[4] = gl520_read_value(client,
953 GL520_REG_IN_INPUT[4]);
954 data->in_min[4] = gl520_read_value(client,
955 GL520_REG_IN_MIN[4]);
956 data->in_max[4] = gl520_read_value(client,
957 GL520_REG_IN_MAX[4]);
1da177e4
LT		 958 }
959
960 data->last_updated = jiffies;
961 data->valid = 1;
962 }
963
9a61bf63 964 mutex_unlock(&data->update_lock);
1da177e4
LT		 965
966 return data;
967}
968
f0967eea 969module_i2c_driver(gl520_driver);
1da177e4
LT		 970
971MODULE_AUTHOR("Frodo Looijaard <frodol@dds.nl>, "
96de0e25 972 "Kyösti Mälkki <kmalkki@cc.hut.fi>, "
1da177e4
LT		 973 "Maarten Deprez <maartendeprez@users.sourceforge.net>");
974MODULE_DESCRIPTION("GL520SM driver");
975MODULE_LICENSE("GPL");
kernel source for telekom puls (alcatel/mediatek)