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hwmon: (gl520sm) Avoid forward declaration
[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
1da177e4
LT		 76/* Client data */
77struct gl520_data {
1beeffe4 78 struct device *hwmon_dev;
9a61bf63 79 struct mutex update_lock;
1da177e4
LT		 80 char valid; /* zero until the following fields are valid */
81 unsigned long last_updated; /* in jiffies */
82
83 u8 vid;
84 u8 vrm;
85 u8 in_input[5]; /* [0] = VVD */
86 u8 in_min[5]; /* [0] = VDD */
87 u8 in_max[5]; /* [0] = VDD */
88 u8 fan_input[2];
89 u8 fan_min[2];
90 u8 fan_div[2];
91 u8 fan_off;
92 u8 temp_input[2];
93 u8 temp_max[2];
94 u8 temp_max_hyst[2];
95 u8 alarms;
96 u8 beep_enable;
97 u8 beep_mask;
98 u8 alarm_mask;
99 u8 two_temps;
100};
101
df51f2d7
AL		 102/*
103 * Registers 0x07 to 0x0c are word-sized, others are byte-sized
104 * GL520 uses a high-byte first convention
105 */
106static int gl520_read_value(struct i2c_client *client, u8 reg)
107{
108 if ((reg >= 0x07) && (reg <= 0x0c))
109 return i2c_smbus_read_word_swapped(client, reg);
110 else
111 return i2c_smbus_read_byte_data(client, reg);
112}
113
114static int gl520_write_value(struct i2c_client *client, u8 reg, u16 value)
115{
116 if ((reg >= 0x07) && (reg <= 0x0c))
117 return i2c_smbus_write_word_swapped(client, reg, value);
118 else
119 return i2c_smbus_write_byte_data(client, reg, value);
120}
121
122static struct gl520_data *gl520_update_device(struct device *dev)
123{
124 struct i2c_client *client = to_i2c_client(dev);
125 struct gl520_data *data = i2c_get_clientdata(client);
126 int val, i;
127
128 mutex_lock(&data->update_lock);
129
130 if (time_after(jiffies, data->last_updated + 2 * HZ) || !data->valid) {
131
132 dev_dbg(&client->dev, "Starting gl520sm update\n");
133
134 data->alarms = gl520_read_value(client, GL520_REG_ALARMS);
135 data->beep_mask = gl520_read_value(client, GL520_REG_BEEP_MASK);
136 data->vid = gl520_read_value(client,
137 GL520_REG_VID_INPUT) & 0x1f;
138
139 for (i = 0; i < 4; i++) {
140 data->in_input[i] = gl520_read_value(client,
141 GL520_REG_IN_INPUT[i]);
142 val = gl520_read_value(client, GL520_REG_IN_LIMIT[i]);
143 data->in_min[i] = val & 0xff;
144 data->in_max[i] = (val >> 8) & 0xff;
145 }
146
147 val = gl520_read_value(client, GL520_REG_FAN_INPUT);
148 data->fan_input[0] = (val >> 8) & 0xff;
149 data->fan_input[1] = val & 0xff;
150
151 val = gl520_read_value(client, GL520_REG_FAN_MIN);
152 data->fan_min[0] = (val >> 8) & 0xff;
153 data->fan_min[1] = val & 0xff;
154
155 data->temp_input[0] = gl520_read_value(client,
156 GL520_REG_TEMP_INPUT[0]);
157 data->temp_max[0] = gl520_read_value(client,
158 GL520_REG_TEMP_MAX[0]);
159 data->temp_max_hyst[0] = gl520_read_value(client,
160 GL520_REG_TEMP_MAX_HYST[0]);
161
162 val = gl520_read_value(client, GL520_REG_FAN_DIV);
163 data->fan_div[0] = (val >> 6) & 0x03;
164 data->fan_div[1] = (val >> 4) & 0x03;
165 data->fan_off = (val >> 2) & 0x01;
166
167 data->alarms &= data->alarm_mask;
168
169 val = gl520_read_value(client, GL520_REG_CONF);
170 data->beep_enable = !((val >> 2) & 1);
171
172 /* Temp1 and Vin4 are the same input */
173 if (data->two_temps) {
174 data->temp_input[1] = gl520_read_value(client,
175 GL520_REG_TEMP_INPUT[1]);
176 data->temp_max[1] = gl520_read_value(client,
177 GL520_REG_TEMP_MAX[1]);
178 data->temp_max_hyst[1] = gl520_read_value(client,
179 GL520_REG_TEMP_MAX_HYST[1]);
180 } else {
181 data->in_input[4] = gl520_read_value(client,
182 GL520_REG_IN_INPUT[4]);
183 data->in_min[4] = gl520_read_value(client,
184 GL520_REG_IN_MIN[4]);
185 data->in_max[4] = gl520_read_value(client,
186 GL520_REG_IN_MAX[4]);
187 }
188
189 data->last_updated = jiffies;
190 data->valid = 1;
191 }
192
193 mutex_unlock(&data->update_lock);
194
195 return data;
196}
197
1da177e4
LT		 198/*
199 * Sysfs stuff
200 */
201
86d47f12
JD		 202static ssize_t get_cpu_vid(struct device *dev, struct device_attribute *attr,
203 char *buf)
1da177e4 204{
86d47f12 205 struct gl520_data *data = gl520_update_device(dev);
1da177e4
LT		 206 return sprintf(buf, "%u\n", vid_from_reg(data->vid, data->vrm));
207}
86d47f12 208static DEVICE_ATTR(cpu0_vid, S_IRUGO, get_cpu_vid, NULL);
1da177e4 209
43da3d12 210#define VDD_FROM_REG(val) (((val) * 95 + 2) / 4)
2a844c14 211#define VDD_TO_REG(val) clamp_val((((val) * 4 + 47) / 95), 0, 255)
1da177e4 212
43da3d12 213#define IN_FROM_REG(val) ((val) * 19)
2a844c14 214#define IN_TO_REG(val) clamp_val((((val) + 9) / 19), 0, 255)
1da177e4 215
86d47f12
JD		 216static ssize_t get_in_input(struct device *dev, struct device_attribute *attr,
217 char *buf)
1da177e4 218{
86d47f12
JD		 219 int n = to_sensor_dev_attr(attr)->index;
220 struct gl520_data *data = gl520_update_device(dev);
1da177e4
LT		 221 u8 r = data->in_input[n];
222
223 if (n == 0)
224 return sprintf(buf, "%d\n", VDD_FROM_REG(r));
225 else
226 return sprintf(buf, "%d\n", IN_FROM_REG(r));
227}
228
86d47f12
JD		 229static ssize_t get_in_min(struct device *dev, struct device_attribute *attr,
230 char *buf)
1da177e4 231{
86d47f12
JD		 232 int n = to_sensor_dev_attr(attr)->index;
233 struct gl520_data *data = gl520_update_device(dev);
1da177e4
LT		 234 u8 r = data->in_min[n];
235
236 if (n == 0)
237 return sprintf(buf, "%d\n", VDD_FROM_REG(r));
238 else
239 return sprintf(buf, "%d\n", IN_FROM_REG(r));
240}
241
86d47f12
JD		 242static ssize_t get_in_max(struct device *dev, struct device_attribute *attr,
243 char *buf)
1da177e4 244{
86d47f12
JD		 245 int n = to_sensor_dev_attr(attr)->index;
246 struct gl520_data *data = gl520_update_device(dev);
1da177e4
LT		 247 u8 r = data->in_max[n];
248
249 if (n == 0)
250 return sprintf(buf, "%d\n", VDD_FROM_REG(r));
251 else
252 return sprintf(buf, "%d\n", IN_FROM_REG(r));
253}
254
86d47f12
JD		 255static ssize_t set_in_min(struct device *dev, struct device_attribute *attr,
256 const char *buf, size_t count)
1da177e4 257{
86d47f12
JD		 258 struct i2c_client *client = to_i2c_client(dev);
259 struct gl520_data *data = i2c_get_clientdata(client);
260 int n = to_sensor_dev_attr(attr)->index;
1da177e4 261 u8 r;
43da3d12
GR		 262 long v;
263 int err;
264
265 err = kstrtol(buf, 10, &v);
266 if (err)
267 return err;
1da177e4 268
9a61bf63 269 mutex_lock(&data->update_lock);
1da177e4
LT		 270
271 if (n == 0)
272 r = VDD_TO_REG(v);
273 else
274 r = IN_TO_REG(v);
275
276 data->in_min[n] = r;
277
278 if (n < 4)
86d47f12
JD		 279 gl520_write_value(client, GL520_REG_IN_MIN[n],
280 (gl520_read_value(client, GL520_REG_IN_MIN[n])
281 & ~0xff) | r);
1da177e4 282 else
86d47f12 283 gl520_write_value(client, GL520_REG_IN_MIN[n], r);
1da177e4 284
9a61bf63 285 mutex_unlock(&data->update_lock);
1da177e4
LT		 286 return count;
287}
288
86d47f12
JD		 289static ssize_t set_in_max(struct device *dev, struct device_attribute *attr,
290 const char *buf, size_t count)
1da177e4 291{
86d47f12
JD		 292 struct i2c_client *client = to_i2c_client(dev);
293 struct gl520_data *data = i2c_get_clientdata(client);
294 int n = to_sensor_dev_attr(attr)->index;
1da177e4 295 u8 r;
43da3d12
GR		 296 long v;
297 int err;
298
299 err = kstrtol(buf, 10, &v);
300 if (err)
301 return err;
1da177e4
LT		 302
303 if (n == 0)
304 r = VDD_TO_REG(v);
305 else
306 r = IN_TO_REG(v);
307
9a61bf63 308 mutex_lock(&data->update_lock);
1da177e4
LT		 309
310 data->in_max[n] = r;
311
312 if (n < 4)
86d47f12
JD		 313 gl520_write_value(client, GL520_REG_IN_MAX[n],
314 (gl520_read_value(client, GL520_REG_IN_MAX[n])
315 & ~0xff00) | (r << 8));
1da177e4 316 else
86d47f12 317 gl520_write_value(client, GL520_REG_IN_MAX[n], r);
1da177e4 318
9a61bf63 319 mutex_unlock(&data->update_lock);
1da177e4
LT		 320 return count;
321}
322
86d47f12
JD		 323static SENSOR_DEVICE_ATTR(in0_input, S_IRUGO, get_in_input, NULL, 0);
324static SENSOR_DEVICE_ATTR(in1_input, S_IRUGO, get_in_input, NULL, 1);
325static SENSOR_DEVICE_ATTR(in2_input, S_IRUGO, get_in_input, NULL, 2);
326static SENSOR_DEVICE_ATTR(in3_input, S_IRUGO, get_in_input, NULL, 3);
327static SENSOR_DEVICE_ATTR(in4_input, S_IRUGO, get_in_input, NULL, 4);
328static SENSOR_DEVICE_ATTR(in0_min, S_IRUGO | S_IWUSR,
329 get_in_min, set_in_min, 0);
330static SENSOR_DEVICE_ATTR(in1_min, S_IRUGO | S_IWUSR,
331 get_in_min, set_in_min, 1);
332static SENSOR_DEVICE_ATTR(in2_min, S_IRUGO | S_IWUSR,
333 get_in_min, set_in_min, 2);
334static SENSOR_DEVICE_ATTR(in3_min, S_IRUGO | S_IWUSR,
335 get_in_min, set_in_min, 3);
336static SENSOR_DEVICE_ATTR(in4_min, S_IRUGO | S_IWUSR,
337 get_in_min, set_in_min, 4);
338static SENSOR_DEVICE_ATTR(in0_max, S_IRUGO | S_IWUSR,
339 get_in_max, set_in_max, 0);
340static SENSOR_DEVICE_ATTR(in1_max, S_IRUGO | S_IWUSR,
341 get_in_max, set_in_max, 1);
342static SENSOR_DEVICE_ATTR(in2_max, S_IRUGO | S_IWUSR,
343 get_in_max, set_in_max, 2);
344static SENSOR_DEVICE_ATTR(in3_max, S_IRUGO | S_IWUSR,
345 get_in_max, set_in_max, 3);
346static SENSOR_DEVICE_ATTR(in4_max, S_IRUGO | S_IWUSR,
347 get_in_max, set_in_max, 4);
348
1da177e4 349#define DIV_FROM_REG(val) (1 << (val))
43da3d12
GR		 350#define FAN_FROM_REG(val, div) ((val) == 0 ? 0 : (480000 / ((val) << (div))))
351#define FAN_TO_REG(val, div) ((val) <= 0 ? 0 : \
2a844c14 352 clamp_val((480000 + ((val) << ((div)-1))) / ((val) << (div)), 1, 255))
1da177e4 353
86d47f12
JD		 354static ssize_t get_fan_input(struct device *dev, struct device_attribute *attr,
355 char *buf)
1da177e4 356{
86d47f12
JD		 357 int n = to_sensor_dev_attr(attr)->index;
358 struct gl520_data *data = gl520_update_device(dev);
359
360 return sprintf(buf, "%d\n", FAN_FROM_REG(data->fan_input[n],
361 data->fan_div[n]));
1da177e4
LT		 362}
363
86d47f12
JD		 364static ssize_t get_fan_min(struct device *dev, struct device_attribute *attr,
365 char *buf)
1da177e4 366{
86d47f12
JD		 367 int n = to_sensor_dev_attr(attr)->index;
368 struct gl520_data *data = gl520_update_device(dev);
369
370 return sprintf(buf, "%d\n", FAN_FROM_REG(data->fan_min[n],
371 data->fan_div[n]));
1da177e4
LT		 372}
373
86d47f12
JD		 374static ssize_t get_fan_div(struct device *dev, struct device_attribute *attr,
375 char *buf)
1da177e4 376{
86d47f12
JD		 377 int n = to_sensor_dev_attr(attr)->index;
378 struct gl520_data *data = gl520_update_device(dev);
379
380 return sprintf(buf, "%d\n", DIV_FROM_REG(data->fan_div[n]));
1da177e4
LT		 381}
382
86d47f12
JD		 383static ssize_t get_fan_off(struct device *dev, struct device_attribute *attr,
384 char *buf)
1da177e4 385{
86d47f12 386 struct gl520_data *data = gl520_update_device(dev);
1da177e4
LT		 387 return sprintf(buf, "%d\n", data->fan_off);
388}
389
86d47f12
JD		 390static ssize_t set_fan_min(struct device *dev, struct device_attribute *attr,
391 const char *buf, size_t count)
1da177e4 392{
86d47f12
JD		 393 struct i2c_client *client = to_i2c_client(dev);
394 struct gl520_data *data = i2c_get_clientdata(client);
395 int n = to_sensor_dev_attr(attr)->index;
1da177e4 396 u8 r;
43da3d12
GR		 397 unsigned long v;
398 int err;
399
400 err = kstrtoul(buf, 10, &v);
401 if (err)
402 return err;
1da177e4 403
9a61bf63 404 mutex_lock(&data->update_lock);
86d47f12
JD		 405 r = FAN_TO_REG(v, data->fan_div[n]);
406 data->fan_min[n] = r;
1da177e4 407
86d47f12
JD		 408 if (n == 0)
409 gl520_write_value(client, GL520_REG_FAN_MIN,
410 (gl520_read_value(client, GL520_REG_FAN_MIN)
411 & ~0xff00) | (r << 8));
1da177e4 412 else
86d47f12
JD		 413 gl520_write_value(client, GL520_REG_FAN_MIN,
414 (gl520_read_value(client, GL520_REG_FAN_MIN)
415 & ~0xff) | r);
1da177e4
LT		 416
417 data->beep_mask = gl520_read_value(client, GL520_REG_BEEP_MASK);
86d47f12
JD		 418 if (data->fan_min[n] == 0)
419 data->alarm_mask &= (n == 0) ? ~0x20 : ~0x40;
1da177e4 420 else
86d47f12 421 data->alarm_mask |= (n == 0) ? 0x20 : 0x40;
1da177e4
LT		 422 data->beep_mask &= data->alarm_mask;
423 gl520_write_value(client, GL520_REG_BEEP_MASK, data->beep_mask);
424
9a61bf63 425 mutex_unlock(&data->update_lock);
1da177e4
LT		 426 return count;
427}
428
86d47f12
JD		 429static ssize_t set_fan_div(struct device *dev, struct device_attribute *attr,
430 const char *buf, size_t count)
1da177e4 431{
86d47f12
JD		 432 struct i2c_client *client = to_i2c_client(dev);
433 struct gl520_data *data = i2c_get_clientdata(client);
434 int n = to_sensor_dev_attr(attr)->index;
1da177e4 435 u8 r;
43da3d12
GR		 436 unsigned long v;
437 int err;
438
439 err = kstrtoul(buf, 10, &v);
440 if (err)
441 return err;
1da177e4
LT		 442
443 switch (v) {
43da3d12
GR		 444 case 1:
445 r = 0;
446 break;
447 case 2:
448 r = 1;
449 break;
450 case 4:
451 r = 2;
452 break;
453 case 8:
454 r = 3;
455 break;
1da177e4 456 default:
43da3d12
GR		 457 dev_err(&client->dev,
458 "fan_div value %ld not supported. Choose one of 1, 2, 4 or 8!\n", v);
1da177e4
LT		 459 return -EINVAL;
460 }
461
9a61bf63 462 mutex_lock(&data->update_lock);
86d47f12 463 data->fan_div[n] = r;
1da177e4 464
86d47f12
JD		 465 if (n == 0)
466 gl520_write_value(client, GL520_REG_FAN_DIV,
467 (gl520_read_value(client, GL520_REG_FAN_DIV)
468 & ~0xc0) | (r << 6));
1da177e4 469 else
86d47f12
JD		 470 gl520_write_value(client, GL520_REG_FAN_DIV,
471 (gl520_read_value(client, GL520_REG_FAN_DIV)
472 & ~0x30) | (r << 4));
1da177e4 473
9a61bf63 474 mutex_unlock(&data->update_lock);
1da177e4
LT		 475 return count;
476}
477
86d47f12
JD		 478static ssize_t set_fan_off(struct device *dev, struct device_attribute *attr,
479 const char *buf, size_t count)
1da177e4 480{
86d47f12
JD		 481 struct i2c_client *client = to_i2c_client(dev);
482 struct gl520_data *data = i2c_get_clientdata(client);
43da3d12
GR		 483 u8 r;
484 unsigned long v;
485 int err;
486
487 err = kstrtoul(buf, 10, &v);
488 if (err)
489 return err;
490
491 r = (v ? 1 : 0);
1da177e4 492
9a61bf63 493 mutex_lock(&data->update_lock);
1da177e4 494 data->fan_off = r;
86d47f12
JD		 495 gl520_write_value(client, GL520_REG_FAN_OFF,
496 (gl520_read_value(client, GL520_REG_FAN_OFF)
497 & ~0x0c) | (r << 2));
9a61bf63 498 mutex_unlock(&data->update_lock);
1da177e4
LT		 499 return count;
500}
501
86d47f12
JD		 502static SENSOR_DEVICE_ATTR(fan1_input, S_IRUGO, get_fan_input, NULL, 0);
503static SENSOR_DEVICE_ATTR(fan2_input, S_IRUGO, get_fan_input, NULL, 1);
504static SENSOR_DEVICE_ATTR(fan1_min, S_IRUGO | S_IWUSR,
505 get_fan_min, set_fan_min, 0);
506static SENSOR_DEVICE_ATTR(fan2_min, S_IRUGO | S_IWUSR,
507 get_fan_min, set_fan_min, 1);
508static SENSOR_DEVICE_ATTR(fan1_div, S_IRUGO | S_IWUSR,
509 get_fan_div, set_fan_div, 0);
510static SENSOR_DEVICE_ATTR(fan2_div, S_IRUGO | S_IWUSR,
511 get_fan_div, set_fan_div, 1);
512static DEVICE_ATTR(fan1_off, S_IRUGO | S_IWUSR,
513 get_fan_off, set_fan_off);
514
1da177e4 515#define TEMP_FROM_REG(val) (((val) - 130) * 1000)
2a844c14 516#define TEMP_TO_REG(val) clamp_val(((((val) < 0 ? \
43da3d12 517 (val) - 500 : (val) + 500) / 1000) + 130), 0, 255)
1da177e4 518
86d47f12
JD		 519static ssize_t get_temp_input(struct device *dev, struct device_attribute *attr,
520 char *buf)
1da177e4 521{
86d47f12
JD		 522 int n = to_sensor_dev_attr(attr)->index;
523 struct gl520_data *data = gl520_update_device(dev);
524
525 return sprintf(buf, "%d\n", TEMP_FROM_REG(data->temp_input[n]));
1da177e4
LT		 526}
527
86d47f12
JD		 528static ssize_t get_temp_max(struct device *dev, struct device_attribute *attr,
529 char *buf)
1da177e4 530{
86d47f12
JD		 531 int n = to_sensor_dev_attr(attr)->index;
532 struct gl520_data *data = gl520_update_device(dev);
533
534 return sprintf(buf, "%d\n", TEMP_FROM_REG(data->temp_max[n]));
1da177e4
LT		 535}
536
43da3d12
GR		 537static ssize_t get_temp_max_hyst(struct device *dev,
538 struct device_attribute *attr, char *buf)
1da177e4 539{
86d47f12
JD		 540 int n = to_sensor_dev_attr(attr)->index;
541 struct gl520_data *data = gl520_update_device(dev);
542
543 return sprintf(buf, "%d\n", TEMP_FROM_REG(data->temp_max_hyst[n]));
1da177e4
LT		 544}
545
86d47f12
JD		 546static ssize_t set_temp_max(struct device *dev, struct device_attribute *attr,
547 const char *buf, size_t count)
1da177e4 548{
86d47f12
JD		 549 struct i2c_client *client = to_i2c_client(dev);
550 struct gl520_data *data = i2c_get_clientdata(client);
551 int n = to_sensor_dev_attr(attr)->index;
43da3d12
GR		 552 long v;
553 int err;
554
555 err = kstrtol(buf, 10, &v);
556 if (err)
557 return err;
1da177e4 558
9a61bf63 559 mutex_lock(&data->update_lock);
86d47f12
JD		 560 data->temp_max[n] = TEMP_TO_REG(v);
561 gl520_write_value(client, GL520_REG_TEMP_MAX[n], data->temp_max[n]);
9a61bf63 562 mutex_unlock(&data->update_lock);
1da177e4
LT		 563 return count;
564}
565
86d47f12
JD		 566static ssize_t set_temp_max_hyst(struct device *dev, struct device_attribute
567 *attr, const char *buf, size_t count)
1da177e4 568{
86d47f12
JD		 569 struct i2c_client *client = to_i2c_client(dev);
570 struct gl520_data *data = i2c_get_clientdata(client);
571 int n = to_sensor_dev_attr(attr)->index;
43da3d12
GR		 572 long v;
573 int err;
574
575 err = kstrtol(buf, 10, &v);
576 if (err)
577 return err;
1da177e4 578
9a61bf63 579 mutex_lock(&data->update_lock);
86d47f12
JD		 580 data->temp_max_hyst[n] = TEMP_TO_REG(v);
581 gl520_write_value(client, GL520_REG_TEMP_MAX_HYST[n],
582 data->temp_max_hyst[n]);
9a61bf63 583 mutex_unlock(&data->update_lock);
1da177e4
LT		 584 return count;
585}
586
86d47f12
JD		 587static SENSOR_DEVICE_ATTR(temp1_input, S_IRUGO, get_temp_input, NULL, 0);
588static SENSOR_DEVICE_ATTR(temp2_input, S_IRUGO, get_temp_input, NULL, 1);
589static SENSOR_DEVICE_ATTR(temp1_max, S_IRUGO | S_IWUSR,
590 get_temp_max, set_temp_max, 0);
591static SENSOR_DEVICE_ATTR(temp2_max, S_IRUGO | S_IWUSR,
592 get_temp_max, set_temp_max, 1);
593static SENSOR_DEVICE_ATTR(temp1_max_hyst, S_IRUGO | S_IWUSR,
594 get_temp_max_hyst, set_temp_max_hyst, 0);
595static SENSOR_DEVICE_ATTR(temp2_max_hyst, S_IRUGO | S_IWUSR,
596 get_temp_max_hyst, set_temp_max_hyst, 1);
597
598static ssize_t get_alarms(struct device *dev, struct device_attribute *attr,
599 char *buf)
1da177e4 600{
86d47f12 601 struct gl520_data *data = gl520_update_device(dev);
1da177e4
LT		 602 return sprintf(buf, "%d\n", data->alarms);
603}
604
86d47f12
JD		 605static ssize_t get_beep_enable(struct device *dev, struct device_attribute
606 *attr, char *buf)
1da177e4 607{
86d47f12 608 struct gl520_data *data = gl520_update_device(dev);
1da177e4
LT		 609 return sprintf(buf, "%d\n", data->beep_enable);
610}
611
86d47f12
JD		 612static ssize_t get_beep_mask(struct device *dev, struct device_attribute *attr,
613 char *buf)
1da177e4 614{
86d47f12 615 struct gl520_data *data = gl520_update_device(dev);
1da177e4
LT		 616 return sprintf(buf, "%d\n", data->beep_mask);
617}
618
86d47f12
JD		 619static ssize_t set_beep_enable(struct device *dev, struct device_attribute
620 *attr, const char *buf, size_t count)
1da177e4 621{
86d47f12
JD		 622 struct i2c_client *client = to_i2c_client(dev);
623 struct gl520_data *data = i2c_get_clientdata(client);
43da3d12
GR		 624 u8 r;
625 unsigned long v;
626 int err;
627
628 err = kstrtoul(buf, 10, &v);
629 if (err)
630 return err;
631
632 r = (v ? 0 : 1);
1da177e4 633
9a61bf63 634 mutex_lock(&data->update_lock);
1da177e4 635 data->beep_enable = !r;
86d47f12
JD		 636 gl520_write_value(client, GL520_REG_BEEP_ENABLE,
637 (gl520_read_value(client, GL520_REG_BEEP_ENABLE)
638 & ~0x04) | (r << 2));
9a61bf63 639 mutex_unlock(&data->update_lock);
1da177e4
LT		 640 return count;
641}
642
86d47f12
JD		 643static ssize_t set_beep_mask(struct device *dev, struct device_attribute *attr,
644 const char *buf, size_t count)
1da177e4 645{
86d47f12
JD		 646 struct i2c_client *client = to_i2c_client(dev);
647 struct gl520_data *data = i2c_get_clientdata(client);
43da3d12
GR		 648 unsigned long r;
649 int err;
650
651 err = kstrtoul(buf, 10, &r);
652 if (err)
653 return err;
f28dc2f7 654
9a61bf63 655 mutex_lock(&data->update_lock);
1da177e4
LT		 656 r &= data->alarm_mask;
657 data->beep_mask = r;
86d47f12 658 gl520_write_value(client, GL520_REG_BEEP_MASK, r);
9a61bf63 659 mutex_unlock(&data->update_lock);
1da177e4
LT		 660 return count;
661}
662
86d47f12
JD		 663static DEVICE_ATTR(alarms, S_IRUGO, get_alarms, NULL);
664static DEVICE_ATTR(beep_enable, S_IRUGO | S_IWUSR,
665 get_beep_enable, set_beep_enable);
666static DEVICE_ATTR(beep_mask, S_IRUGO | S_IWUSR,
667 get_beep_mask, set_beep_mask);
668
e86a7760
JD		 669static ssize_t get_alarm(struct device *dev, struct device_attribute *attr,
670 char *buf)
671{
672 int bit_nr = to_sensor_dev_attr(attr)->index;
673 struct gl520_data *data = gl520_update_device(dev);
674
675 return sprintf(buf, "%d\n", (data->alarms >> bit_nr) & 1);
676}
677
678static SENSOR_DEVICE_ATTR(in0_alarm, S_IRUGO, get_alarm, NULL, 0);
679static SENSOR_DEVICE_ATTR(in1_alarm, S_IRUGO, get_alarm, NULL, 1);
680static SENSOR_DEVICE_ATTR(in2_alarm, S_IRUGO, get_alarm, NULL, 2);
681static SENSOR_DEVICE_ATTR(in3_alarm, S_IRUGO, get_alarm, NULL, 3);
682static SENSOR_DEVICE_ATTR(temp1_alarm, S_IRUGO, get_alarm, NULL, 4);
683static SENSOR_DEVICE_ATTR(fan1_alarm, S_IRUGO, get_alarm, NULL, 5);
684static SENSOR_DEVICE_ATTR(fan2_alarm, S_IRUGO, get_alarm, NULL, 6);
685static SENSOR_DEVICE_ATTR(temp2_alarm, S_IRUGO, get_alarm, NULL, 7);
686static SENSOR_DEVICE_ATTR(in4_alarm, S_IRUGO, get_alarm, NULL, 7);
687
688static ssize_t get_beep(struct device *dev, struct device_attribute *attr,
689 char *buf)
690{
691 int bitnr = to_sensor_dev_attr(attr)->index;
692 struct gl520_data *data = gl520_update_device(dev);
693
694 return sprintf(buf, "%d\n", (data->beep_mask >> bitnr) & 1);
695}
696
697static ssize_t set_beep(struct device *dev, struct device_attribute *attr,
698 const char *buf, size_t count)
699{
700 struct i2c_client *client = to_i2c_client(dev);
701 struct gl520_data *data = i2c_get_clientdata(client);
702 int bitnr = to_sensor_dev_attr(attr)->index;
703 unsigned long bit;
704
43da3d12
GR		 705 int err;
706
707 err = kstrtoul(buf, 10, &bit);
708 if (err)
709 return err;
e86a7760
JD		 710 if (bit & ~1)
711 return -EINVAL;
712
713 mutex_lock(&data->update_lock);
714 data->beep_mask = gl520_read_value(client, GL520_REG_BEEP_MASK);
715 if (bit)
716 data->beep_mask |= (1 << bitnr);
717 else
718 data->beep_mask &= ~(1 << bitnr);
719 gl520_write_value(client, GL520_REG_BEEP_MASK, data->beep_mask);
720 mutex_unlock(&data->update_lock);
721 return count;
722}
723
724static SENSOR_DEVICE_ATTR(in0_beep, S_IRUGO | S_IWUSR, get_beep, set_beep, 0);
725static SENSOR_DEVICE_ATTR(in1_beep, S_IRUGO | S_IWUSR, get_beep, set_beep, 1);
726static SENSOR_DEVICE_ATTR(in2_beep, S_IRUGO | S_IWUSR, get_beep, set_beep, 2);
727static SENSOR_DEVICE_ATTR(in3_beep, S_IRUGO | S_IWUSR, get_beep, set_beep, 3);
728static SENSOR_DEVICE_ATTR(temp1_beep, S_IRUGO | S_IWUSR, get_beep, set_beep, 4);
729static SENSOR_DEVICE_ATTR(fan1_beep, S_IRUGO | S_IWUSR, get_beep, set_beep, 5);
730static SENSOR_DEVICE_ATTR(fan2_beep, S_IRUGO | S_IWUSR, get_beep, set_beep, 6);
731static SENSOR_DEVICE_ATTR(temp2_beep, S_IRUGO | S_IWUSR, get_beep, set_beep, 7);
732static SENSOR_DEVICE_ATTR(in4_beep, S_IRUGO | S_IWUSR, get_beep, set_beep, 7);
733
87808be4
JD		 734static struct attribute *gl520_attributes[] = {
735 &dev_attr_cpu0_vid.attr,
736
86d47f12
JD		 737 &sensor_dev_attr_in0_input.dev_attr.attr,
738 &sensor_dev_attr_in0_min.dev_attr.attr,
739 &sensor_dev_attr_in0_max.dev_attr.attr,
e86a7760
JD		 740 &sensor_dev_attr_in0_alarm.dev_attr.attr,
741 &sensor_dev_attr_in0_beep.dev_attr.attr,
86d47f12
JD		 742 &sensor_dev_attr_in1_input.dev_attr.attr,
743 &sensor_dev_attr_in1_min.dev_attr.attr,
744 &sensor_dev_attr_in1_max.dev_attr.attr,
e86a7760
JD		 745 &sensor_dev_attr_in1_alarm.dev_attr.attr,
746 &sensor_dev_attr_in1_beep.dev_attr.attr,
86d47f12
JD		 747 &sensor_dev_attr_in2_input.dev_attr.attr,
748 &sensor_dev_attr_in2_min.dev_attr.attr,
749 &sensor_dev_attr_in2_max.dev_attr.attr,
e86a7760
JD		 750 &sensor_dev_attr_in2_alarm.dev_attr.attr,
751 &sensor_dev_attr_in2_beep.dev_attr.attr,
86d47f12
JD		 752 &sensor_dev_attr_in3_input.dev_attr.attr,
753 &sensor_dev_attr_in3_min.dev_attr.attr,
754 &sensor_dev_attr_in3_max.dev_attr.attr,
e86a7760
JD		 755 &sensor_dev_attr_in3_alarm.dev_attr.attr,
756 &sensor_dev_attr_in3_beep.dev_attr.attr,
86d47f12
JD		 757
758 &sensor_dev_attr_fan1_input.dev_attr.attr,
759 &sensor_dev_attr_fan1_min.dev_attr.attr,
760 &sensor_dev_attr_fan1_div.dev_attr.attr,
e86a7760
JD		 761 &sensor_dev_attr_fan1_alarm.dev_attr.attr,
762 &sensor_dev_attr_fan1_beep.dev_attr.attr,
87808be4 763 &dev_attr_fan1_off.attr,
86d47f12
JD		 764 &sensor_dev_attr_fan2_input.dev_attr.attr,
765 &sensor_dev_attr_fan2_min.dev_attr.attr,
766 &sensor_dev_attr_fan2_div.dev_attr.attr,
e86a7760
JD		 767 &sensor_dev_attr_fan2_alarm.dev_attr.attr,
768 &sensor_dev_attr_fan2_beep.dev_attr.attr,
87808be4 769
86d47f12
JD		 770 &sensor_dev_attr_temp1_input.dev_attr.attr,
771 &sensor_dev_attr_temp1_max.dev_attr.attr,
772 &sensor_dev_attr_temp1_max_hyst.dev_attr.attr,
e86a7760
JD		 773 &sensor_dev_attr_temp1_alarm.dev_attr.attr,
774 &sensor_dev_attr_temp1_beep.dev_attr.attr,
87808be4
JD		 775
776 &dev_attr_alarms.attr,
777 &dev_attr_beep_enable.attr,
778 &dev_attr_beep_mask.attr,
779 NULL
780};
781
782static const struct attribute_group gl520_group = {
783 .attrs = gl520_attributes,
784};
785
f445a9af 786static struct attribute *gl520_attributes_in4[] = {
86d47f12
JD		 787 &sensor_dev_attr_in4_input.dev_attr.attr,
788 &sensor_dev_attr_in4_min.dev_attr.attr,
789 &sensor_dev_attr_in4_max.dev_attr.attr,
e86a7760
JD		 790 &sensor_dev_attr_in4_alarm.dev_attr.attr,
791 &sensor_dev_attr_in4_beep.dev_attr.attr,
f445a9af
GR		 792 NULL
793};
87808be4 794
f445a9af 795static struct attribute *gl520_attributes_temp2[] = {
86d47f12
JD		 796 &sensor_dev_attr_temp2_input.dev_attr.attr,
797 &sensor_dev_attr_temp2_max.dev_attr.attr,
798 &sensor_dev_attr_temp2_max_hyst.dev_attr.attr,
e86a7760
JD		 799 &sensor_dev_attr_temp2_alarm.dev_attr.attr,
800 &sensor_dev_attr_temp2_beep.dev_attr.attr,
87808be4
JD		 801 NULL
802};
803
f445a9af
GR		 804static const struct attribute_group gl520_group_in4 = {
805 .attrs = gl520_attributes_in4,
806};
807
808static const struct attribute_group gl520_group_temp2 = {
809 .attrs = gl520_attributes_temp2,
87808be4
JD		 810};
811
1da177e4
LT		 812
813/*
814 * Real code
815 */
816
a23a9fe1 817/* Return 0 if detection is successful, -ENODEV otherwise */
310ec792 818static int gl520_detect(struct i2c_client *client, struct i2c_board_info *info)
1da177e4 819{
a23a9fe1 820 struct i2c_adapter *adapter = client->adapter;
1da177e4
LT		 821
822 if (!i2c_check_functionality(adapter, I2C_FUNC_SMBUS_BYTE_DATA |
823 I2C_FUNC_SMBUS_WORD_DATA))
a23a9fe1 824 return -ENODEV;
1da177e4
LT		 825
826 /* Determine the chip type. */
52df6440
JD		 827 if ((gl520_read_value(client, GL520_REG_CHIP_ID) != 0x20) ||
828 ((gl520_read_value(client, GL520_REG_REVISION) & 0x7f) != 0x00) ||
829 ((gl520_read_value(client, GL520_REG_CONF) & 0x80) != 0x00)) {
830 dev_dbg(&client->dev, "Unknown chip type, skipping\n");
831 return -ENODEV;
1da177e4
LT		 832 }
833
a23a9fe1 834 strlcpy(info->type, "gl520sm", I2C_NAME_SIZE);
1da177e4 835
a23a9fe1
JD		 836 return 0;
837}
838
df51f2d7
AL		 839/* Called when we have found a new GL520SM. */
840static void gl520_init_client(struct i2c_client *client)
841{
842 struct gl520_data *data = i2c_get_clientdata(client);
843 u8 oldconf, conf;
844
845 conf = oldconf = gl520_read_value(client, GL520_REG_CONF);
846
847 data->alarm_mask = 0xff;
848 data->vrm = vid_which_vrm();
849
850 if (extra_sensor_type == 1)
851 conf &= ~0x10;
852 else if (extra_sensor_type == 2)
853 conf |= 0x10;
854 data->two_temps = !(conf & 0x10);
855
856 /* If IRQ# is disabled, we can safely force comparator mode */
857 if (!(conf & 0x20))
858 conf &= 0xf7;
859
860 /* Enable monitoring if needed */
861 conf |= 0x40;
862
863 if (conf != oldconf)
864 gl520_write_value(client, GL520_REG_CONF, conf);
865
866 gl520_update_device(&(client->dev));
867
868 if (data->fan_min[0] == 0)
869 data->alarm_mask &= ~0x20;
870 if (data->fan_min[1] == 0)
871 data->alarm_mask &= ~0x40;
872
873 data->beep_mask &= data->alarm_mask;
874 gl520_write_value(client, GL520_REG_BEEP_MASK, data->beep_mask);
875}
876
a23a9fe1
JD		 877static int gl520_probe(struct i2c_client *client,
878 const struct i2c_device_id *id)
879{
880 struct gl520_data *data;
881 int err;
882
647ff514
GR		 883 data = devm_kzalloc(&client->dev, sizeof(struct gl520_data),
884 GFP_KERNEL);
885 if (!data)
886 return -ENOMEM;
a23a9fe1
JD		 887
888 i2c_set_clientdata(client, data);
889 mutex_init(&data->update_lock);
1da177e4
LT		 890
891 /* Initialize the GL520SM chip */
f28dc2f7 892 gl520_init_client(client);
1da177e4
LT		 893
894 /* Register sysfs hooks */
43da3d12
GR		 895 err = sysfs_create_group(&client->dev.kobj, &gl520_group);
896 if (err)
647ff514 897 return err;
1da177e4 898
f445a9af
GR		 899 if (data->two_temps)
900 err = sysfs_create_group(&client->dev.kobj, &gl520_group_temp2);
901 else
902 err = sysfs_create_group(&client->dev.kobj, &gl520_group_in4);
1da177e4 903
f445a9af
GR		 904 if (err)
905 goto exit_remove_files;
1da177e4 906
f28dc2f7 907 data->hwmon_dev = hwmon_device_register(&client->dev);
1beeffe4
TJ		 908 if (IS_ERR(data->hwmon_dev)) {
909 err = PTR_ERR(data->hwmon_dev);
87808be4
JD		 910 goto exit_remove_files;
911 }
1da177e4
LT		 912
913 return 0;
914
87808be4 915exit_remove_files:
f28dc2f7 916 sysfs_remove_group(&client->dev.kobj, &gl520_group);
f445a9af
GR		 917 sysfs_remove_group(&client->dev.kobj, &gl520_group_in4);
918 sysfs_remove_group(&client->dev.kobj, &gl520_group_temp2);
1da177e4
LT		 919 return err;
920}
921
a23a9fe1 922static int gl520_remove(struct i2c_client *client)
1da177e4 923{
943b0830 924 struct gl520_data *data = i2c_get_clientdata(client);
1da177e4 925
1beeffe4 926 hwmon_device_unregister(data->hwmon_dev);
87808be4 927 sysfs_remove_group(&client->dev.kobj, &gl520_group);
f445a9af
GR		 928 sysfs_remove_group(&client->dev.kobj, &gl520_group_in4);
929 sysfs_remove_group(&client->dev.kobj, &gl520_group_temp2);
943b0830 930
1da177e4
LT		 931 return 0;
932}
933
df51f2d7
AL		 934static const struct i2c_device_id gl520_id[] = {
935 { "gl520sm", 0 },
936 { }
937};
938MODULE_DEVICE_TABLE(i2c, gl520_id);
1da177e4 939
df51f2d7
AL		 940static struct i2c_driver gl520_driver = {
941 .class = I2C_CLASS_HWMON,
942 .driver = {
943 .name = "gl520sm",
944 },
945 .probe = gl520_probe,
946 .remove = gl520_remove,
947 .id_table = gl520_id,
948 .detect = gl520_detect,
949 .address_list = normal_i2c,
950};
1da177e4 951
f0967eea 952module_i2c_driver(gl520_driver);
1da177e4
LT		 953
954MODULE_AUTHOR("Frodo Looijaard <frodol@dds.nl>, "
96de0e25 955 "Kyösti Mälkki <kmalkki@cc.hut.fi>, "
1da177e4
LT		 956 "Maarten Deprez <maartendeprez@users.sourceforge.net>");
957MODULE_DESCRIPTION("GL520SM driver");
958MODULE_LICENSE("GPL");
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