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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
1da177e4
LT		 76/* Client data */
77struct gl520_data {
d1b9c3f5
AL		 78 struct i2c_client *client;
79 const struct attribute_group *groups[3];
9a61bf63 80 struct mutex update_lock;
1da177e4
LT		 81 char valid; /* zero until the following fields are valid */
82 unsigned long last_updated; /* in jiffies */
83
84 u8 vid;
85 u8 vrm;
86 u8 in_input[5]; /* [0] = VVD */
87 u8 in_min[5]; /* [0] = VDD */
88 u8 in_max[5]; /* [0] = VDD */
89 u8 fan_input[2];
90 u8 fan_min[2];
91 u8 fan_div[2];
92 u8 fan_off;
93 u8 temp_input[2];
94 u8 temp_max[2];
95 u8 temp_max_hyst[2];
96 u8 alarms;
97 u8 beep_enable;
98 u8 beep_mask;
99 u8 alarm_mask;
100 u8 two_temps;
101};
102
df51f2d7
AL		 103/*
104 * Registers 0x07 to 0x0c are word-sized, others are byte-sized
105 * GL520 uses a high-byte first convention
106 */
107static int gl520_read_value(struct i2c_client *client, u8 reg)
108{
109 if ((reg >= 0x07) && (reg <= 0x0c))
110 return i2c_smbus_read_word_swapped(client, reg);
111 else
112 return i2c_smbus_read_byte_data(client, reg);
113}
114
115static int gl520_write_value(struct i2c_client *client, u8 reg, u16 value)
116{
117 if ((reg >= 0x07) && (reg <= 0x0c))
118 return i2c_smbus_write_word_swapped(client, reg, value);
119 else
120 return i2c_smbus_write_byte_data(client, reg, value);
121}
122
123static struct gl520_data *gl520_update_device(struct device *dev)
124{
d1b9c3f5
AL		 125 struct gl520_data *data = dev_get_drvdata(dev);
126 struct i2c_client *client = data->client;
df51f2d7
AL		 127 int val, i;
128
129 mutex_lock(&data->update_lock);
130
131 if (time_after(jiffies, data->last_updated + 2 * HZ) || !data->valid) {
132
133 dev_dbg(&client->dev, "Starting gl520sm update\n");
134
135 data->alarms = gl520_read_value(client, GL520_REG_ALARMS);
136 data->beep_mask = gl520_read_value(client, GL520_REG_BEEP_MASK);
137 data->vid = gl520_read_value(client,
138 GL520_REG_VID_INPUT) & 0x1f;
139
140 for (i = 0; i < 4; i++) {
141 data->in_input[i] = gl520_read_value(client,
142 GL520_REG_IN_INPUT[i]);
143 val = gl520_read_value(client, GL520_REG_IN_LIMIT[i]);
144 data->in_min[i] = val & 0xff;
145 data->in_max[i] = (val >> 8) & 0xff;
146 }
147
148 val = gl520_read_value(client, GL520_REG_FAN_INPUT);
149 data->fan_input[0] = (val >> 8) & 0xff;
150 data->fan_input[1] = val & 0xff;
151
152 val = gl520_read_value(client, GL520_REG_FAN_MIN);
153 data->fan_min[0] = (val >> 8) & 0xff;
154 data->fan_min[1] = val & 0xff;
155
156 data->temp_input[0] = gl520_read_value(client,
157 GL520_REG_TEMP_INPUT[0]);
158 data->temp_max[0] = gl520_read_value(client,
159 GL520_REG_TEMP_MAX[0]);
160 data->temp_max_hyst[0] = gl520_read_value(client,
161 GL520_REG_TEMP_MAX_HYST[0]);
162
163 val = gl520_read_value(client, GL520_REG_FAN_DIV);
164 data->fan_div[0] = (val >> 6) & 0x03;
165 data->fan_div[1] = (val >> 4) & 0x03;
166 data->fan_off = (val >> 2) & 0x01;
167
168 data->alarms &= data->alarm_mask;
169
170 val = gl520_read_value(client, GL520_REG_CONF);
171 data->beep_enable = !((val >> 2) & 1);
172
173 /* Temp1 and Vin4 are the same input */
174 if (data->two_temps) {
175 data->temp_input[1] = gl520_read_value(client,
176 GL520_REG_TEMP_INPUT[1]);
177 data->temp_max[1] = gl520_read_value(client,
178 GL520_REG_TEMP_MAX[1]);
179 data->temp_max_hyst[1] = gl520_read_value(client,
180 GL520_REG_TEMP_MAX_HYST[1]);
181 } else {
182 data->in_input[4] = gl520_read_value(client,
183 GL520_REG_IN_INPUT[4]);
184 data->in_min[4] = gl520_read_value(client,
185 GL520_REG_IN_MIN[4]);
186 data->in_max[4] = gl520_read_value(client,
187 GL520_REG_IN_MAX[4]);
188 }
189
190 data->last_updated = jiffies;
191 data->valid = 1;
192 }
193
194 mutex_unlock(&data->update_lock);
195
196 return data;
197}
198
1da177e4
LT		 199/*
200 * Sysfs stuff
201 */
202
86d47f12
JD		 203static ssize_t get_cpu_vid(struct device *dev, struct device_attribute *attr,
204 char *buf)
1da177e4 205{
86d47f12 206 struct gl520_data *data = gl520_update_device(dev);
1da177e4
LT		 207 return sprintf(buf, "%u\n", vid_from_reg(data->vid, data->vrm));
208}
86d47f12 209static DEVICE_ATTR(cpu0_vid, S_IRUGO, get_cpu_vid, NULL);
1da177e4 210
43da3d12 211#define VDD_FROM_REG(val) (((val) * 95 + 2) / 4)
2a844c14 212#define VDD_TO_REG(val) clamp_val((((val) * 4 + 47) / 95), 0, 255)
1da177e4 213
43da3d12 214#define IN_FROM_REG(val) ((val) * 19)
2a844c14 215#define IN_TO_REG(val) clamp_val((((val) + 9) / 19), 0, 255)
1da177e4 216
86d47f12
JD		 217static ssize_t get_in_input(struct device *dev, struct device_attribute *attr,
218 char *buf)
1da177e4 219{
86d47f12
JD		 220 int n = to_sensor_dev_attr(attr)->index;
221 struct gl520_data *data = gl520_update_device(dev);
1da177e4
LT		 222 u8 r = data->in_input[n];
223
224 if (n == 0)
225 return sprintf(buf, "%d\n", VDD_FROM_REG(r));
226 else
227 return sprintf(buf, "%d\n", IN_FROM_REG(r));
228}
229
86d47f12
JD		 230static ssize_t get_in_min(struct device *dev, struct device_attribute *attr,
231 char *buf)
1da177e4 232{
86d47f12
JD		 233 int n = to_sensor_dev_attr(attr)->index;
234 struct gl520_data *data = gl520_update_device(dev);
1da177e4
LT		 235 u8 r = data->in_min[n];
236
237 if (n == 0)
238 return sprintf(buf, "%d\n", VDD_FROM_REG(r));
239 else
240 return sprintf(buf, "%d\n", IN_FROM_REG(r));
241}
242
86d47f12
JD		 243static ssize_t get_in_max(struct device *dev, struct device_attribute *attr,
244 char *buf)
1da177e4 245{
86d47f12
JD		 246 int n = to_sensor_dev_attr(attr)->index;
247 struct gl520_data *data = gl520_update_device(dev);
1da177e4
LT		 248 u8 r = data->in_max[n];
249
250 if (n == 0)
251 return sprintf(buf, "%d\n", VDD_FROM_REG(r));
252 else
253 return sprintf(buf, "%d\n", IN_FROM_REG(r));
254}
255
86d47f12
JD		 256static ssize_t set_in_min(struct device *dev, struct device_attribute *attr,
257 const char *buf, size_t count)
1da177e4 258{
d1b9c3f5
AL		 259 struct gl520_data *data = dev_get_drvdata(dev);
260 struct i2c_client *client = data->client;
86d47f12 261 int n = to_sensor_dev_attr(attr)->index;
1da177e4 262 u8 r;
43da3d12
GR		 263 long v;
264 int err;
265
266 err = kstrtol(buf, 10, &v);
267 if (err)
268 return err;
1da177e4 269
9a61bf63 270 mutex_lock(&data->update_lock);
1da177e4
LT		 271
272 if (n == 0)
273 r = VDD_TO_REG(v);
274 else
275 r = IN_TO_REG(v);
276
277 data->in_min[n] = r;
278
279 if (n < 4)
86d47f12
JD		 280 gl520_write_value(client, GL520_REG_IN_MIN[n],
281 (gl520_read_value(client, GL520_REG_IN_MIN[n])
282 & ~0xff) | r);
1da177e4 283 else
86d47f12 284 gl520_write_value(client, GL520_REG_IN_MIN[n], r);
1da177e4 285
9a61bf63 286 mutex_unlock(&data->update_lock);
1da177e4
LT		 287 return count;
288}
289
86d47f12
JD		 290static ssize_t set_in_max(struct device *dev, struct device_attribute *attr,
291 const char *buf, size_t count)
1da177e4 292{
d1b9c3f5
AL		 293 struct gl520_data *data = dev_get_drvdata(dev);
294 struct i2c_client *client = data->client;
86d47f12 295 int n = to_sensor_dev_attr(attr)->index;
1da177e4 296 u8 r;
43da3d12
GR		 297 long v;
298 int err;
299
300 err = kstrtol(buf, 10, &v);
301 if (err)
302 return err;
1da177e4
LT		 303
304 if (n == 0)
305 r = VDD_TO_REG(v);
306 else
307 r = IN_TO_REG(v);
308
9a61bf63 309 mutex_lock(&data->update_lock);
1da177e4
LT		 310
311 data->in_max[n] = r;
312
313 if (n < 4)
86d47f12
JD		 314 gl520_write_value(client, GL520_REG_IN_MAX[n],
315 (gl520_read_value(client, GL520_REG_IN_MAX[n])
316 & ~0xff00) | (r << 8));
1da177e4 317 else
86d47f12 318 gl520_write_value(client, GL520_REG_IN_MAX[n], r);
1da177e4 319
9a61bf63 320 mutex_unlock(&data->update_lock);
1da177e4
LT		 321 return count;
322}
323
86d47f12
JD		 324static SENSOR_DEVICE_ATTR(in0_input, S_IRUGO, get_in_input, NULL, 0);
325static SENSOR_DEVICE_ATTR(in1_input, S_IRUGO, get_in_input, NULL, 1);
326static SENSOR_DEVICE_ATTR(in2_input, S_IRUGO, get_in_input, NULL, 2);
327static SENSOR_DEVICE_ATTR(in3_input, S_IRUGO, get_in_input, NULL, 3);
328static SENSOR_DEVICE_ATTR(in4_input, S_IRUGO, get_in_input, NULL, 4);
329static SENSOR_DEVICE_ATTR(in0_min, S_IRUGO | S_IWUSR,
330 get_in_min, set_in_min, 0);
331static SENSOR_DEVICE_ATTR(in1_min, S_IRUGO | S_IWUSR,
332 get_in_min, set_in_min, 1);
333static SENSOR_DEVICE_ATTR(in2_min, S_IRUGO | S_IWUSR,
334 get_in_min, set_in_min, 2);
335static SENSOR_DEVICE_ATTR(in3_min, S_IRUGO | S_IWUSR,
336 get_in_min, set_in_min, 3);
337static SENSOR_DEVICE_ATTR(in4_min, S_IRUGO | S_IWUSR,
338 get_in_min, set_in_min, 4);
339static SENSOR_DEVICE_ATTR(in0_max, S_IRUGO | S_IWUSR,
340 get_in_max, set_in_max, 0);
341static SENSOR_DEVICE_ATTR(in1_max, S_IRUGO | S_IWUSR,
342 get_in_max, set_in_max, 1);
343static SENSOR_DEVICE_ATTR(in2_max, S_IRUGO | S_IWUSR,
344 get_in_max, set_in_max, 2);
345static SENSOR_DEVICE_ATTR(in3_max, S_IRUGO | S_IWUSR,
346 get_in_max, set_in_max, 3);
347static SENSOR_DEVICE_ATTR(in4_max, S_IRUGO | S_IWUSR,
348 get_in_max, set_in_max, 4);
349
1da177e4 350#define DIV_FROM_REG(val) (1 << (val))
43da3d12
GR		 351#define FAN_FROM_REG(val, div) ((val) == 0 ? 0 : (480000 / ((val) << (div))))
352#define FAN_TO_REG(val, div) ((val) <= 0 ? 0 : \
2a844c14 353 clamp_val((480000 + ((val) << ((div)-1))) / ((val) << (div)), 1, 255))
1da177e4 354
86d47f12
JD		 355static ssize_t get_fan_input(struct device *dev, struct device_attribute *attr,
356 char *buf)
1da177e4 357{
86d47f12
JD		 358 int n = to_sensor_dev_attr(attr)->index;
359 struct gl520_data *data = gl520_update_device(dev);
360
361 return sprintf(buf, "%d\n", FAN_FROM_REG(data->fan_input[n],
362 data->fan_div[n]));
1da177e4
LT		 363}
364
86d47f12
JD		 365static ssize_t get_fan_min(struct device *dev, struct device_attribute *attr,
366 char *buf)
1da177e4 367{
86d47f12
JD		 368 int n = to_sensor_dev_attr(attr)->index;
369 struct gl520_data *data = gl520_update_device(dev);
370
371 return sprintf(buf, "%d\n", FAN_FROM_REG(data->fan_min[n],
372 data->fan_div[n]));
1da177e4
LT		 373}
374
86d47f12
JD		 375static ssize_t get_fan_div(struct device *dev, struct device_attribute *attr,
376 char *buf)
1da177e4 377{
86d47f12
JD		 378 int n = to_sensor_dev_attr(attr)->index;
379 struct gl520_data *data = gl520_update_device(dev);
380
381 return sprintf(buf, "%d\n", DIV_FROM_REG(data->fan_div[n]));
1da177e4
LT		 382}
383
86d47f12
JD		 384static ssize_t get_fan_off(struct device *dev, struct device_attribute *attr,
385 char *buf)
1da177e4 386{
86d47f12 387 struct gl520_data *data = gl520_update_device(dev);
1da177e4
LT		 388 return sprintf(buf, "%d\n", data->fan_off);
389}
390
86d47f12
JD		 391static ssize_t set_fan_min(struct device *dev, struct device_attribute *attr,
392 const char *buf, size_t count)
1da177e4 393{
d1b9c3f5
AL		 394 struct gl520_data *data = dev_get_drvdata(dev);
395 struct i2c_client *client = data->client;
86d47f12 396 int n = to_sensor_dev_attr(attr)->index;
1da177e4 397 u8 r;
43da3d12
GR		 398 unsigned long v;
399 int err;
400
401 err = kstrtoul(buf, 10, &v);
402 if (err)
403 return err;
1da177e4 404
9a61bf63 405 mutex_lock(&data->update_lock);
86d47f12
JD		 406 r = FAN_TO_REG(v, data->fan_div[n]);
407 data->fan_min[n] = r;
1da177e4 408
86d47f12
JD		 409 if (n == 0)
410 gl520_write_value(client, GL520_REG_FAN_MIN,
411 (gl520_read_value(client, GL520_REG_FAN_MIN)
412 & ~0xff00) | (r << 8));
1da177e4 413 else
86d47f12
JD		 414 gl520_write_value(client, GL520_REG_FAN_MIN,
415 (gl520_read_value(client, GL520_REG_FAN_MIN)
416 & ~0xff) | r);
1da177e4
LT		 417
418 data->beep_mask = gl520_read_value(client, GL520_REG_BEEP_MASK);
86d47f12
JD		 419 if (data->fan_min[n] == 0)
420 data->alarm_mask &= (n == 0) ? ~0x20 : ~0x40;
1da177e4 421 else
86d47f12 422 data->alarm_mask |= (n == 0) ? 0x20 : 0x40;
1da177e4
LT		 423 data->beep_mask &= data->alarm_mask;
424 gl520_write_value(client, GL520_REG_BEEP_MASK, data->beep_mask);
425
9a61bf63 426 mutex_unlock(&data->update_lock);
1da177e4
LT		 427 return count;
428}
429
86d47f12
JD		 430static ssize_t set_fan_div(struct device *dev, struct device_attribute *attr,
431 const char *buf, size_t count)
1da177e4 432{
d1b9c3f5
AL		 433 struct gl520_data *data = dev_get_drvdata(dev);
434 struct i2c_client *client = data->client;
86d47f12 435 int n = to_sensor_dev_attr(attr)->index;
1da177e4 436 u8 r;
43da3d12
GR		 437 unsigned long v;
438 int err;
439
440 err = kstrtoul(buf, 10, &v);
441 if (err)
442 return err;
1da177e4
LT		 443
444 switch (v) {
43da3d12
GR		 445 case 1:
446 r = 0;
447 break;
448 case 2:
449 r = 1;
450 break;
451 case 4:
452 r = 2;
453 break;
454 case 8:
455 r = 3;
456 break;
1da177e4 457 default:
43da3d12
GR		 458 dev_err(&client->dev,
459 "fan_div value %ld not supported. Choose one of 1, 2, 4 or 8!\n", v);
1da177e4
LT		 460 return -EINVAL;
461 }
462
9a61bf63 463 mutex_lock(&data->update_lock);
86d47f12 464 data->fan_div[n] = r;
1da177e4 465
86d47f12
JD		 466 if (n == 0)
467 gl520_write_value(client, GL520_REG_FAN_DIV,
468 (gl520_read_value(client, GL520_REG_FAN_DIV)
469 & ~0xc0) | (r << 6));
1da177e4 470 else
86d47f12
JD		 471 gl520_write_value(client, GL520_REG_FAN_DIV,
472 (gl520_read_value(client, GL520_REG_FAN_DIV)
473 & ~0x30) | (r << 4));
1da177e4 474
9a61bf63 475 mutex_unlock(&data->update_lock);
1da177e4
LT		 476 return count;
477}
478
86d47f12
JD		 479static ssize_t set_fan_off(struct device *dev, struct device_attribute *attr,
480 const char *buf, size_t count)
1da177e4 481{
d1b9c3f5
AL		 482 struct gl520_data *data = dev_get_drvdata(dev);
483 struct i2c_client *client = data->client;
43da3d12
GR		 484 u8 r;
485 unsigned long v;
486 int err;
487
488 err = kstrtoul(buf, 10, &v);
489 if (err)
490 return err;
491
492 r = (v ? 1 : 0);
1da177e4 493
9a61bf63 494 mutex_lock(&data->update_lock);
1da177e4 495 data->fan_off = r;
86d47f12
JD		 496 gl520_write_value(client, GL520_REG_FAN_OFF,
497 (gl520_read_value(client, GL520_REG_FAN_OFF)
498 & ~0x0c) | (r << 2));
9a61bf63 499 mutex_unlock(&data->update_lock);
1da177e4
LT		 500 return count;
501}
502
86d47f12
JD		 503static SENSOR_DEVICE_ATTR(fan1_input, S_IRUGO, get_fan_input, NULL, 0);
504static SENSOR_DEVICE_ATTR(fan2_input, S_IRUGO, get_fan_input, NULL, 1);
505static SENSOR_DEVICE_ATTR(fan1_min, S_IRUGO | S_IWUSR,
506 get_fan_min, set_fan_min, 0);
507static SENSOR_DEVICE_ATTR(fan2_min, S_IRUGO | S_IWUSR,
508 get_fan_min, set_fan_min, 1);
509static SENSOR_DEVICE_ATTR(fan1_div, S_IRUGO | S_IWUSR,
510 get_fan_div, set_fan_div, 0);
511static SENSOR_DEVICE_ATTR(fan2_div, S_IRUGO | S_IWUSR,
512 get_fan_div, set_fan_div, 1);
513static DEVICE_ATTR(fan1_off, S_IRUGO | S_IWUSR,
514 get_fan_off, set_fan_off);
515
1da177e4 516#define TEMP_FROM_REG(val) (((val) - 130) * 1000)
2a844c14 517#define TEMP_TO_REG(val) clamp_val(((((val) < 0 ? \
43da3d12 518 (val) - 500 : (val) + 500) / 1000) + 130), 0, 255)
1da177e4 519
86d47f12
JD		 520static ssize_t get_temp_input(struct device *dev, struct device_attribute *attr,
521 char *buf)
1da177e4 522{
86d47f12
JD		 523 int n = to_sensor_dev_attr(attr)->index;
524 struct gl520_data *data = gl520_update_device(dev);
525
526 return sprintf(buf, "%d\n", TEMP_FROM_REG(data->temp_input[n]));
1da177e4
LT		 527}
528
86d47f12
JD		 529static ssize_t get_temp_max(struct device *dev, struct device_attribute *attr,
530 char *buf)
1da177e4 531{
86d47f12
JD		 532 int n = to_sensor_dev_attr(attr)->index;
533 struct gl520_data *data = gl520_update_device(dev);
534
535 return sprintf(buf, "%d\n", TEMP_FROM_REG(data->temp_max[n]));
1da177e4
LT		 536}
537
43da3d12
GR		 538static ssize_t get_temp_max_hyst(struct device *dev,
539 struct device_attribute *attr, char *buf)
1da177e4 540{
86d47f12
JD		 541 int n = to_sensor_dev_attr(attr)->index;
542 struct gl520_data *data = gl520_update_device(dev);
543
544 return sprintf(buf, "%d\n", TEMP_FROM_REG(data->temp_max_hyst[n]));
1da177e4
LT		 545}
546
86d47f12
JD		 547static ssize_t set_temp_max(struct device *dev, struct device_attribute *attr,
548 const char *buf, size_t count)
1da177e4 549{
d1b9c3f5
AL		 550 struct gl520_data *data = dev_get_drvdata(dev);
551 struct i2c_client *client = data->client;
86d47f12 552 int n = to_sensor_dev_attr(attr)->index;
43da3d12
GR		 553 long v;
554 int err;
555
556 err = kstrtol(buf, 10, &v);
557 if (err)
558 return err;
1da177e4 559
9a61bf63 560 mutex_lock(&data->update_lock);
86d47f12
JD		 561 data->temp_max[n] = TEMP_TO_REG(v);
562 gl520_write_value(client, GL520_REG_TEMP_MAX[n], data->temp_max[n]);
9a61bf63 563 mutex_unlock(&data->update_lock);
1da177e4
LT		 564 return count;
565}
566
86d47f12
JD		 567static ssize_t set_temp_max_hyst(struct device *dev, struct device_attribute
568 *attr, const char *buf, size_t count)
1da177e4 569{
d1b9c3f5
AL		 570 struct gl520_data *data = dev_get_drvdata(dev);
571 struct i2c_client *client = data->client;
86d47f12 572 int n = to_sensor_dev_attr(attr)->index;
43da3d12
GR		 573 long v;
574 int err;
575
576 err = kstrtol(buf, 10, &v);
577 if (err)
578 return err;
1da177e4 579
9a61bf63 580 mutex_lock(&data->update_lock);
86d47f12
JD		 581 data->temp_max_hyst[n] = TEMP_TO_REG(v);
582 gl520_write_value(client, GL520_REG_TEMP_MAX_HYST[n],
583 data->temp_max_hyst[n]);
9a61bf63 584 mutex_unlock(&data->update_lock);
1da177e4
LT		 585 return count;
586}
587
86d47f12
JD		 588static SENSOR_DEVICE_ATTR(temp1_input, S_IRUGO, get_temp_input, NULL, 0);
589static SENSOR_DEVICE_ATTR(temp2_input, S_IRUGO, get_temp_input, NULL, 1);
590static SENSOR_DEVICE_ATTR(temp1_max, S_IRUGO | S_IWUSR,
591 get_temp_max, set_temp_max, 0);
592static SENSOR_DEVICE_ATTR(temp2_max, S_IRUGO | S_IWUSR,
593 get_temp_max, set_temp_max, 1);
594static SENSOR_DEVICE_ATTR(temp1_max_hyst, S_IRUGO | S_IWUSR,
595 get_temp_max_hyst, set_temp_max_hyst, 0);
596static SENSOR_DEVICE_ATTR(temp2_max_hyst, S_IRUGO | S_IWUSR,
597 get_temp_max_hyst, set_temp_max_hyst, 1);
598
599static ssize_t get_alarms(struct device *dev, struct device_attribute *attr,
600 char *buf)
1da177e4 601{
86d47f12 602 struct gl520_data *data = gl520_update_device(dev);
1da177e4
LT		 603 return sprintf(buf, "%d\n", data->alarms);
604}
605
86d47f12
JD		 606static ssize_t get_beep_enable(struct device *dev, struct device_attribute
607 *attr, char *buf)
1da177e4 608{
86d47f12 609 struct gl520_data *data = gl520_update_device(dev);
1da177e4
LT		 610 return sprintf(buf, "%d\n", data->beep_enable);
611}
612
86d47f12
JD		 613static ssize_t get_beep_mask(struct device *dev, struct device_attribute *attr,
614 char *buf)
1da177e4 615{
86d47f12 616 struct gl520_data *data = gl520_update_device(dev);
1da177e4
LT		 617 return sprintf(buf, "%d\n", data->beep_mask);
618}
619
86d47f12
JD		 620static ssize_t set_beep_enable(struct device *dev, struct device_attribute
621 *attr, const char *buf, size_t count)
1da177e4 622{
d1b9c3f5
AL		 623 struct gl520_data *data = dev_get_drvdata(dev);
624 struct i2c_client *client = data->client;
43da3d12
GR		 625 u8 r;
626 unsigned long v;
627 int err;
628
629 err = kstrtoul(buf, 10, &v);
630 if (err)
631 return err;
632
633 r = (v ? 0 : 1);
1da177e4 634
9a61bf63 635 mutex_lock(&data->update_lock);
1da177e4 636 data->beep_enable = !r;
86d47f12
JD		 637 gl520_write_value(client, GL520_REG_BEEP_ENABLE,
638 (gl520_read_value(client, GL520_REG_BEEP_ENABLE)
639 & ~0x04) | (r << 2));
9a61bf63 640 mutex_unlock(&data->update_lock);
1da177e4
LT		 641 return count;
642}
643
86d47f12
JD		 644static ssize_t set_beep_mask(struct device *dev, struct device_attribute *attr,
645 const char *buf, size_t count)
1da177e4 646{
d1b9c3f5
AL		 647 struct gl520_data *data = dev_get_drvdata(dev);
648 struct i2c_client *client = data->client;
43da3d12
GR		 649 unsigned long r;
650 int err;
651
652 err = kstrtoul(buf, 10, &r);
653 if (err)
654 return err;
f28dc2f7 655
9a61bf63 656 mutex_lock(&data->update_lock);
1da177e4
LT		 657 r &= data->alarm_mask;
658 data->beep_mask = r;
86d47f12 659 gl520_write_value(client, GL520_REG_BEEP_MASK, r);
9a61bf63 660 mutex_unlock(&data->update_lock);
1da177e4
LT		 661 return count;
662}
663
86d47f12
JD		 664static DEVICE_ATTR(alarms, S_IRUGO, get_alarms, NULL);
665static DEVICE_ATTR(beep_enable, S_IRUGO | S_IWUSR,
666 get_beep_enable, set_beep_enable);
667static DEVICE_ATTR(beep_mask, S_IRUGO | S_IWUSR,
668 get_beep_mask, set_beep_mask);
669
e86a7760
JD		 670static ssize_t get_alarm(struct device *dev, struct device_attribute *attr,
671 char *buf)
672{
673 int bit_nr = to_sensor_dev_attr(attr)->index;
674 struct gl520_data *data = gl520_update_device(dev);
675
676 return sprintf(buf, "%d\n", (data->alarms >> bit_nr) & 1);
677}
678
679static SENSOR_DEVICE_ATTR(in0_alarm, S_IRUGO, get_alarm, NULL, 0);
680static SENSOR_DEVICE_ATTR(in1_alarm, S_IRUGO, get_alarm, NULL, 1);
681static SENSOR_DEVICE_ATTR(in2_alarm, S_IRUGO, get_alarm, NULL, 2);
682static SENSOR_DEVICE_ATTR(in3_alarm, S_IRUGO, get_alarm, NULL, 3);
683static SENSOR_DEVICE_ATTR(temp1_alarm, S_IRUGO, get_alarm, NULL, 4);
684static SENSOR_DEVICE_ATTR(fan1_alarm, S_IRUGO, get_alarm, NULL, 5);
685static SENSOR_DEVICE_ATTR(fan2_alarm, S_IRUGO, get_alarm, NULL, 6);
686static SENSOR_DEVICE_ATTR(temp2_alarm, S_IRUGO, get_alarm, NULL, 7);
687static SENSOR_DEVICE_ATTR(in4_alarm, S_IRUGO, get_alarm, NULL, 7);
688
689static ssize_t get_beep(struct device *dev, struct device_attribute *attr,
690 char *buf)
691{
692 int bitnr = to_sensor_dev_attr(attr)->index;
693 struct gl520_data *data = gl520_update_device(dev);
694
695 return sprintf(buf, "%d\n", (data->beep_mask >> bitnr) & 1);
696}
697
698static ssize_t set_beep(struct device *dev, struct device_attribute *attr,
699 const char *buf, size_t count)
700{
d1b9c3f5
AL		 701 struct gl520_data *data = dev_get_drvdata(dev);
702 struct i2c_client *client = data->client;
e86a7760
JD		 703 int bitnr = to_sensor_dev_attr(attr)->index;
704 unsigned long bit;
705
43da3d12
GR		 706 int err;
707
708 err = kstrtoul(buf, 10, &bit);
709 if (err)
710 return err;
e86a7760
JD		 711 if (bit & ~1)
712 return -EINVAL;
713
714 mutex_lock(&data->update_lock);
715 data->beep_mask = gl520_read_value(client, GL520_REG_BEEP_MASK);
716 if (bit)
717 data->beep_mask |= (1 << bitnr);
718 else
719 data->beep_mask &= ~(1 << bitnr);
720 gl520_write_value(client, GL520_REG_BEEP_MASK, data->beep_mask);
721 mutex_unlock(&data->update_lock);
722 return count;
723}
724
725static SENSOR_DEVICE_ATTR(in0_beep, S_IRUGO | S_IWUSR, get_beep, set_beep, 0);
726static SENSOR_DEVICE_ATTR(in1_beep, S_IRUGO | S_IWUSR, get_beep, set_beep, 1);
727static SENSOR_DEVICE_ATTR(in2_beep, S_IRUGO | S_IWUSR, get_beep, set_beep, 2);
728static SENSOR_DEVICE_ATTR(in3_beep, S_IRUGO | S_IWUSR, get_beep, set_beep, 3);
729static SENSOR_DEVICE_ATTR(temp1_beep, S_IRUGO | S_IWUSR, get_beep, set_beep, 4);
730static SENSOR_DEVICE_ATTR(fan1_beep, S_IRUGO | S_IWUSR, get_beep, set_beep, 5);
731static SENSOR_DEVICE_ATTR(fan2_beep, S_IRUGO | S_IWUSR, get_beep, set_beep, 6);
732static SENSOR_DEVICE_ATTR(temp2_beep, S_IRUGO | S_IWUSR, get_beep, set_beep, 7);
733static SENSOR_DEVICE_ATTR(in4_beep, S_IRUGO | S_IWUSR, get_beep, set_beep, 7);
734
87808be4
JD		 735static struct attribute *gl520_attributes[] = {
736 &dev_attr_cpu0_vid.attr,
737
86d47f12
JD		 738 &sensor_dev_attr_in0_input.dev_attr.attr,
739 &sensor_dev_attr_in0_min.dev_attr.attr,
740 &sensor_dev_attr_in0_max.dev_attr.attr,
e86a7760
JD		 741 &sensor_dev_attr_in0_alarm.dev_attr.attr,
742 &sensor_dev_attr_in0_beep.dev_attr.attr,
86d47f12
JD		 743 &sensor_dev_attr_in1_input.dev_attr.attr,
744 &sensor_dev_attr_in1_min.dev_attr.attr,
745 &sensor_dev_attr_in1_max.dev_attr.attr,
e86a7760
JD		 746 &sensor_dev_attr_in1_alarm.dev_attr.attr,
747 &sensor_dev_attr_in1_beep.dev_attr.attr,
86d47f12
JD		 748 &sensor_dev_attr_in2_input.dev_attr.attr,
749 &sensor_dev_attr_in2_min.dev_attr.attr,
750 &sensor_dev_attr_in2_max.dev_attr.attr,
e86a7760
JD		 751 &sensor_dev_attr_in2_alarm.dev_attr.attr,
752 &sensor_dev_attr_in2_beep.dev_attr.attr,
86d47f12
JD		 753 &sensor_dev_attr_in3_input.dev_attr.attr,
754 &sensor_dev_attr_in3_min.dev_attr.attr,
755 &sensor_dev_attr_in3_max.dev_attr.attr,
e86a7760
JD		 756 &sensor_dev_attr_in3_alarm.dev_attr.attr,
757 &sensor_dev_attr_in3_beep.dev_attr.attr,
86d47f12
JD		 758
759 &sensor_dev_attr_fan1_input.dev_attr.attr,
760 &sensor_dev_attr_fan1_min.dev_attr.attr,
761 &sensor_dev_attr_fan1_div.dev_attr.attr,
e86a7760
JD		 762 &sensor_dev_attr_fan1_alarm.dev_attr.attr,
763 &sensor_dev_attr_fan1_beep.dev_attr.attr,
87808be4 764 &dev_attr_fan1_off.attr,
86d47f12
JD		 765 &sensor_dev_attr_fan2_input.dev_attr.attr,
766 &sensor_dev_attr_fan2_min.dev_attr.attr,
767 &sensor_dev_attr_fan2_div.dev_attr.attr,
e86a7760
JD		 768 &sensor_dev_attr_fan2_alarm.dev_attr.attr,
769 &sensor_dev_attr_fan2_beep.dev_attr.attr,
87808be4 770
86d47f12
JD		 771 &sensor_dev_attr_temp1_input.dev_attr.attr,
772 &sensor_dev_attr_temp1_max.dev_attr.attr,
773 &sensor_dev_attr_temp1_max_hyst.dev_attr.attr,
e86a7760
JD		 774 &sensor_dev_attr_temp1_alarm.dev_attr.attr,
775 &sensor_dev_attr_temp1_beep.dev_attr.attr,
87808be4
JD		 776
777 &dev_attr_alarms.attr,
778 &dev_attr_beep_enable.attr,
779 &dev_attr_beep_mask.attr,
780 NULL
781};
782
783static const struct attribute_group gl520_group = {
784 .attrs = gl520_attributes,
785};
786
f445a9af 787static struct attribute *gl520_attributes_in4[] = {
86d47f12
JD		 788 &sensor_dev_attr_in4_input.dev_attr.attr,
789 &sensor_dev_attr_in4_min.dev_attr.attr,
790 &sensor_dev_attr_in4_max.dev_attr.attr,
e86a7760
JD		 791 &sensor_dev_attr_in4_alarm.dev_attr.attr,
792 &sensor_dev_attr_in4_beep.dev_attr.attr,
f445a9af
GR		 793 NULL
794};
87808be4 795
f445a9af 796static struct attribute *gl520_attributes_temp2[] = {
86d47f12
JD		 797 &sensor_dev_attr_temp2_input.dev_attr.attr,
798 &sensor_dev_attr_temp2_max.dev_attr.attr,
799 &sensor_dev_attr_temp2_max_hyst.dev_attr.attr,
e86a7760
JD		 800 &sensor_dev_attr_temp2_alarm.dev_attr.attr,
801 &sensor_dev_attr_temp2_beep.dev_attr.attr,
87808be4
JD		 802 NULL
803};
804
f445a9af
GR		 805static const struct attribute_group gl520_group_in4 = {
806 .attrs = gl520_attributes_in4,
807};
808
809static const struct attribute_group gl520_group_temp2 = {
810 .attrs = gl520_attributes_temp2,
87808be4
JD		 811};
812
1da177e4
LT		 813
814/*
815 * Real code
816 */
817
a23a9fe1 818/* Return 0 if detection is successful, -ENODEV otherwise */
310ec792 819static int gl520_detect(struct i2c_client *client, struct i2c_board_info *info)
1da177e4 820{
a23a9fe1 821 struct i2c_adapter *adapter = client->adapter;
1da177e4
LT		 822
823 if (!i2c_check_functionality(adapter, I2C_FUNC_SMBUS_BYTE_DATA |
824 I2C_FUNC_SMBUS_WORD_DATA))
a23a9fe1 825 return -ENODEV;
1da177e4
LT		 826
827 /* Determine the chip type. */
52df6440
JD		 828 if ((gl520_read_value(client, GL520_REG_CHIP_ID) != 0x20) ||
829 ((gl520_read_value(client, GL520_REG_REVISION) & 0x7f) != 0x00) ||
830 ((gl520_read_value(client, GL520_REG_CONF) & 0x80) != 0x00)) {
831 dev_dbg(&client->dev, "Unknown chip type, skipping\n");
832 return -ENODEV;
1da177e4
LT		 833 }
834
a23a9fe1 835 strlcpy(info->type, "gl520sm", I2C_NAME_SIZE);
1da177e4 836
a23a9fe1
JD		 837 return 0;
838}
839
df51f2d7
AL		 840/* Called when we have found a new GL520SM. */
841static void gl520_init_client(struct i2c_client *client)
842{
843 struct gl520_data *data = i2c_get_clientdata(client);
844 u8 oldconf, conf;
845
846 conf = oldconf = gl520_read_value(client, GL520_REG_CONF);
847
848 data->alarm_mask = 0xff;
849 data->vrm = vid_which_vrm();
850
851 if (extra_sensor_type == 1)
852 conf &= ~0x10;
853 else if (extra_sensor_type == 2)
854 conf |= 0x10;
855 data->two_temps = !(conf & 0x10);
856
857 /* If IRQ# is disabled, we can safely force comparator mode */
858 if (!(conf & 0x20))
859 conf &= 0xf7;
860
861 /* Enable monitoring if needed */
862 conf |= 0x40;
863
864 if (conf != oldconf)
865 gl520_write_value(client, GL520_REG_CONF, conf);
866
867 gl520_update_device(&(client->dev));
868
869 if (data->fan_min[0] == 0)
870 data->alarm_mask &= ~0x20;
871 if (data->fan_min[1] == 0)
872 data->alarm_mask &= ~0x40;
873
874 data->beep_mask &= data->alarm_mask;
875 gl520_write_value(client, GL520_REG_BEEP_MASK, data->beep_mask);
876}
877
a23a9fe1
JD		 878static int gl520_probe(struct i2c_client *client,
879 const struct i2c_device_id *id)
880{
d1b9c3f5
AL		 881 struct device *dev = &client->dev;
882 struct device *hwmon_dev;
a23a9fe1 883 struct gl520_data *data;
a23a9fe1 884
d1b9c3f5 885 data = devm_kzalloc(dev, sizeof(struct gl520_data), GFP_KERNEL);
647ff514
GR		 886 if (!data)
887 return -ENOMEM;
a23a9fe1
JD		 888
889 i2c_set_clientdata(client, data);
890 mutex_init(&data->update_lock);
d1b9c3f5 891 data->client = client;
1da177e4
LT		 892
893 /* Initialize the GL520SM chip */
f28dc2f7 894 gl520_init_client(client);
1da177e4 895
d1b9c3f5
AL		 896 /* sysfs hooks */
897 data->groups[0] = &gl520_group;
1da177e4 898
f445a9af 899 if (data->two_temps)
d1b9c3f5 900 data->groups[1] = &gl520_group_temp2;
f445a9af 901 else
d1b9c3f5 902 data->groups[1] = &gl520_group_in4;
1da177e4 903
d1b9c3f5
AL		 904 hwmon_dev = devm_hwmon_device_register_with_groups(dev, client->name,
905 data, data->groups);
906 return PTR_ERR_OR_ZERO(hwmon_dev);
1da177e4
LT		 907}
908
df51f2d7
AL		 909static const struct i2c_device_id gl520_id[] = {
910 { "gl520sm", 0 },
911 { }
912};
913MODULE_DEVICE_TABLE(i2c, gl520_id);
1da177e4 914
df51f2d7
AL		 915static struct i2c_driver gl520_driver = {
916 .class = I2C_CLASS_HWMON,
917 .driver = {
918 .name = "gl520sm",
919 },
920 .probe = gl520_probe,
df51f2d7
AL		 921 .id_table = gl520_id,
922 .detect = gl520_detect,
923 .address_list = normal_i2c,
924};
1da177e4 925
f0967eea 926module_i2c_driver(gl520_driver);
1da177e4
LT		 927
928MODULE_AUTHOR("Frodo Looijaard <frodol@dds.nl>, "
96de0e25 929 "Kyösti Mälkki <kmalkki@cc.hut.fi>, "
1da177e4
LT		 930 "Maarten Deprez <maartendeprez@users.sourceforge.net>");
931MODULE_DESCRIPTION("GL520SM driver");
932MODULE_LICENSE("GPL");
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