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i2c: Get rid of struct i2c_client_address_data
[deliverable/linux.git] / drivers / hwmon / lm80.c
CommitLineData
1da177e4
LT		 1/*
2 * lm80.c - From lm_sensors, Linux kernel modules for hardware
3 * monitoring
4 * Copyright (C) 1998, 1999 Frodo Looijaard <frodol@dds.nl>
5 * and Philip Edelbrock <phil@netroedge.com>
6 *
7 * Ported to Linux 2.6 by Tiago Sousa <mirage@kaotik.org>
8 *
9 * This program is free software; you can redistribute it and/or modify
10 * it under the terms of the GNU General Public License as published by
11 * the Free Software Foundation; either version 2 of the License, or
12 * (at your option) any later version.
13 *
14 * This program is distributed in the hope that it will be useful,
15 * but WITHOUT ANY WARRANTY; without even the implied warranty of
16 * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
17 * GNU General Public License for more details.
18 *
19 * You should have received a copy of the GNU General Public License
20 * along with this program; if not, write to the Free Software
21 * Foundation, Inc., 675 Mass Ave, Cambridge, MA 02139, USA.
22 */
23
1da177e4
LT		 24#include <linux/module.h>
25#include <linux/init.h>
26#include <linux/slab.h>
27#include <linux/jiffies.h>
28#include <linux/i2c.h>
943b0830 29#include <linux/hwmon.h>
f8181762 30#include <linux/hwmon-sysfs.h>
943b0830 31#include <linux/err.h>
9a61bf63 32#include <linux/mutex.h>
1da177e4
LT		 33
34/* Addresses to scan */
25e9c86d
MH		 35static const unsigned short normal_i2c[] = { 0x28, 0x29, 0x2a, 0x2b, 0x2c, 0x2d,
36 0x2e, 0x2f, I2C_CLIENT_END };
1da177e4
LT		 37
38/* Insmod parameters */
f4b50261 39I2C_CLIENT_INSMOD_1(lm80);
1da177e4
LT		 40
41/* Many LM80 constants specified below */
42
43/* The LM80 registers */
44#define LM80_REG_IN_MAX(nr) (0x2a + (nr) * 2)
45#define LM80_REG_IN_MIN(nr) (0x2b + (nr) * 2)
46#define LM80_REG_IN(nr) (0x20 + (nr))
47
48#define LM80_REG_FAN1 0x28
49#define LM80_REG_FAN2 0x29
50#define LM80_REG_FAN_MIN(nr) (0x3b + (nr))
51
52#define LM80_REG_TEMP 0x27
53#define LM80_REG_TEMP_HOT_MAX 0x38
54#define LM80_REG_TEMP_HOT_HYST 0x39
55#define LM80_REG_TEMP_OS_MAX 0x3a
56#define LM80_REG_TEMP_OS_HYST 0x3b
57
58#define LM80_REG_CONFIG 0x00
59#define LM80_REG_ALARM1 0x01
60#define LM80_REG_ALARM2 0x02
61#define LM80_REG_MASK1 0x03
62#define LM80_REG_MASK2 0x04
63#define LM80_REG_FANDIV 0x05
64#define LM80_REG_RES 0x06
65
66
67/* Conversions. Rounding and limit checking is only done on the TO_REG
68 variants. Note that you should be a bit careful with which arguments
69 these macros are called: arguments may be evaluated more than once.
70 Fixing this is just not worth it. */
71
72#define IN_TO_REG(val) (SENSORS_LIMIT(((val)+5)/10,0,255))
73#define IN_FROM_REG(val) ((val)*10)
74
75static inline unsigned char FAN_TO_REG(unsigned rpm, unsigned div)
76{
77 if (rpm == 0)
78 return 255;
79 rpm = SENSORS_LIMIT(rpm, 1, 1000000);
80 return SENSORS_LIMIT((1350000 + rpm*div / 2) / (rpm*div), 1, 254);
81}
82
83#define FAN_FROM_REG(val,div) ((val)==0?-1:\
84 (val)==255?0:1350000/((div)*(val)))
85
86static inline long TEMP_FROM_REG(u16 temp)
87{
88 long res;
89
90 temp >>= 4;
91 if (temp < 0x0800)
92 res = 625 * (long) temp;
93 else
94 res = ((long) temp - 0x01000) * 625;
95
96 return res / 10;
97}
98
99#define TEMP_LIMIT_FROM_REG(val) (((val)>0x80?(val)-0x100:(val))*1000)
100
101#define TEMP_LIMIT_TO_REG(val) SENSORS_LIMIT((val)<0?\
102 ((val)-500)/1000:((val)+500)/1000,0,255)
103
104#define DIV_FROM_REG(val) (1 << (val))
105
106/*
107 * Client data (each client gets its own)
108 */
109
110struct lm80_data {
1beeffe4 111 struct device *hwmon_dev;
9a61bf63 112 struct mutex update_lock;
1da177e4
LT		 113 char valid; /* !=0 if following fields are valid */
114 unsigned long last_updated; /* In jiffies */
115
116 u8 in[7]; /* Register value */
117 u8 in_max[7]; /* Register value */
118 u8 in_min[7]; /* Register value */
119 u8 fan[2]; /* Register value */
120 u8 fan_min[2]; /* Register value */
121 u8 fan_div[2]; /* Register encoding, shifted right */
122 u16 temp; /* Register values, shifted right */
123 u8 temp_hot_max; /* Register value */
124 u8 temp_hot_hyst; /* Register value */
125 u8 temp_os_max; /* Register value */
126 u8 temp_os_hyst; /* Register value */
127 u16 alarms; /* Register encoding, combined */
128};
129
6cc37ee5 130/*
1da177e4
LT		 131 * Functions declaration
132 */
133
8c8bacc8
JD		 134static int lm80_probe(struct i2c_client *client,
135 const struct i2c_device_id *id);
310ec792 136static int lm80_detect(struct i2c_client *client, struct i2c_board_info *info);
1da177e4 137static void lm80_init_client(struct i2c_client *client);
8c8bacc8 138static int lm80_remove(struct i2c_client *client);
1da177e4
LT		 139static struct lm80_data *lm80_update_device(struct device *dev);
140static int lm80_read_value(struct i2c_client *client, u8 reg);
141static int lm80_write_value(struct i2c_client *client, u8 reg, u8 value);
142
143/*
144 * Driver data (common to all clients)
145 */
146
8c8bacc8
JD		 147static const struct i2c_device_id lm80_id[] = {
148 { "lm80", lm80 },
149 { }
150};
151MODULE_DEVICE_TABLE(i2c, lm80_id);
152
1da177e4 153static struct i2c_driver lm80_driver = {
8c8bacc8 154 .class = I2C_CLASS_HWMON,
cdaf7934 155 .driver = {
cdaf7934
LR		 156 .name = "lm80",
157 },
8c8bacc8
JD		 158 .probe = lm80_probe,
159 .remove = lm80_remove,
160 .id_table = lm80_id,
161 .detect = lm80_detect,
c3813d6a 162 .address_list = normal_i2c,
1da177e4
LT		 163};
164
165/*
166 * Sysfs stuff
167 */
168
169#define show_in(suffix, value) \
8627f9ba 170static ssize_t show_in_##suffix(struct device *dev, struct device_attribute *attr, char *buf) \
1da177e4 171{ \
f8181762 172 int nr = to_sensor_dev_attr(attr)->index; \
1da177e4 173 struct lm80_data *data = lm80_update_device(dev); \
f8181762 174 return sprintf(buf, "%d\n", IN_FROM_REG(data->value[nr])); \
1da177e4 175}
f8181762
JD		 176show_in(min, in_min)
177show_in(max, in_max)
178show_in(input, in)
1da177e4
LT		 179
180#define set_in(suffix, value, reg) \
8627f9ba 181static ssize_t set_in_##suffix(struct device *dev, struct device_attribute *attr, const char *buf, \
1da177e4
LT		 182 size_t count) \
183{ \
f8181762 184 int nr = to_sensor_dev_attr(attr)->index; \
1da177e4
LT		 185 struct i2c_client *client = to_i2c_client(dev); \
186 struct lm80_data *data = i2c_get_clientdata(client); \
187 long val = simple_strtol(buf, NULL, 10); \
188 \
9a61bf63 189 mutex_lock(&data->update_lock);\
f8181762
JD		 190 data->value[nr] = IN_TO_REG(val); \
191 lm80_write_value(client, reg(nr), data->value[nr]); \
9a61bf63 192 mutex_unlock(&data->update_lock);\
1da177e4
LT		 193 return count; \
194}
f8181762
JD		 195set_in(min, in_min, LM80_REG_IN_MIN)
196set_in(max, in_max, LM80_REG_IN_MAX)
197
198#define show_fan(suffix, value) \
8627f9ba 199static ssize_t show_fan_##suffix(struct device *dev, struct device_attribute *attr, char *buf) \
1da177e4 200{ \
f8181762 201 int nr = to_sensor_dev_attr(attr)->index; \
1da177e4 202 struct lm80_data *data = lm80_update_device(dev); \
f8181762
JD		 203 return sprintf(buf, "%d\n", FAN_FROM_REG(data->value[nr], \
204 DIV_FROM_REG(data->fan_div[nr]))); \
1da177e4 205}
f8181762
JD		 206show_fan(min, fan_min)
207show_fan(input, fan)
1da177e4 208
f8181762
JD		 209static ssize_t show_fan_div(struct device *dev, struct device_attribute *attr,
210 char *buf)
211{
212 int nr = to_sensor_dev_attr(attr)->index;
213 struct lm80_data *data = lm80_update_device(dev);
214 return sprintf(buf, "%d\n", DIV_FROM_REG(data->fan_div[nr]));
1da177e4 215}
1da177e4 216
f8181762
JD		 217static ssize_t set_fan_min(struct device *dev, struct device_attribute *attr,
218 const char *buf, size_t count)
219{
220 int nr = to_sensor_dev_attr(attr)->index;
221 struct i2c_client *client = to_i2c_client(dev);
222 struct lm80_data *data = i2c_get_clientdata(client);
223 long val = simple_strtoul(buf, NULL, 10);
224
225 mutex_lock(&data->update_lock);
226 data->fan_min[nr] = FAN_TO_REG(val, DIV_FROM_REG(data->fan_div[nr]));
227 lm80_write_value(client, LM80_REG_FAN_MIN(nr + 1), data->fan_min[nr]);
228 mutex_unlock(&data->update_lock);
229 return count;
1da177e4 230}
1da177e4
LT		 231
232/* Note: we save and restore the fan minimum here, because its value is
233 determined in part by the fan divisor. This follows the principle of
d6e05edc 234 least surprise; the user doesn't expect the fan minimum to change just
1da177e4 235 because the divisor changed. */
f8181762
JD		 236static ssize_t set_fan_div(struct device *dev, struct device_attribute *attr,
237 const char *buf, size_t count)
1da177e4 238{
f8181762 239 int nr = to_sensor_dev_attr(attr)->index;
1da177e4
LT		 240 struct i2c_client *client = to_i2c_client(dev);
241 struct lm80_data *data = i2c_get_clientdata(client);
242 unsigned long min, val = simple_strtoul(buf, NULL, 10);
243 u8 reg;
244
245 /* Save fan_min */
9a61bf63 246 mutex_lock(&data->update_lock);
1da177e4
LT		 247 min = FAN_FROM_REG(data->fan_min[nr],
248 DIV_FROM_REG(data->fan_div[nr]));
249
250 switch (val) {
251 case 1: data->fan_div[nr] = 0; break;
252 case 2: data->fan_div[nr] = 1; break;
253 case 4: data->fan_div[nr] = 2; break;
254 case 8: data->fan_div[nr] = 3; break;
255 default:
256 dev_err(&client->dev, "fan_div value %ld not "
257 "supported. Choose one of 1, 2, 4 or 8!\n", val);
9a61bf63 258 mutex_unlock(&data->update_lock);
1da177e4
LT		 259 return -EINVAL;
260 }
261
262 reg = (lm80_read_value(client, LM80_REG_FANDIV) & ~(3 << (2 * (nr + 1))))
263 | (data->fan_div[nr] << (2 * (nr + 1)));
264 lm80_write_value(client, LM80_REG_FANDIV, reg);
265
266 /* Restore fan_min */
267 data->fan_min[nr] = FAN_TO_REG(min, DIV_FROM_REG(data->fan_div[nr]));
268 lm80_write_value(client, LM80_REG_FAN_MIN(nr + 1), data->fan_min[nr]);
9a61bf63 269 mutex_unlock(&data->update_lock);
1da177e4
LT		 270
271 return count;
272}
273
8627f9ba 274static ssize_t show_temp_input1(struct device *dev, struct device_attribute *attr, char *buf)
1da177e4
LT		 275{
276 struct lm80_data *data = lm80_update_device(dev);
277 return sprintf(buf, "%ld\n", TEMP_FROM_REG(data->temp));
278}
279
280#define show_temp(suffix, value) \
8627f9ba 281static ssize_t show_temp_##suffix(struct device *dev, struct device_attribute *attr, char *buf) \
1da177e4
LT		 282{ \
283 struct lm80_data *data = lm80_update_device(dev); \
284 return sprintf(buf, "%d\n", TEMP_LIMIT_FROM_REG(data->value)); \
285}
286show_temp(hot_max, temp_hot_max);
287show_temp(hot_hyst, temp_hot_hyst);
288show_temp(os_max, temp_os_max);
289show_temp(os_hyst, temp_os_hyst);
290
291#define set_temp(suffix, value, reg) \
8627f9ba 292static ssize_t set_temp_##suffix(struct device *dev, struct device_attribute *attr, const char *buf, \
1da177e4
LT		 293 size_t count) \
294{ \
295 struct i2c_client *client = to_i2c_client(dev); \
296 struct lm80_data *data = i2c_get_clientdata(client); \
297 long val = simple_strtoul(buf, NULL, 10); \
298 \
9a61bf63 299 mutex_lock(&data->update_lock); \
1da177e4
LT		 300 data->value = TEMP_LIMIT_TO_REG(val); \
301 lm80_write_value(client, reg, data->value); \
9a61bf63 302 mutex_unlock(&data->update_lock); \
1da177e4
LT		 303 return count; \
304}
305set_temp(hot_max, temp_hot_max, LM80_REG_TEMP_HOT_MAX);
306set_temp(hot_hyst, temp_hot_hyst, LM80_REG_TEMP_HOT_HYST);
307set_temp(os_max, temp_os_max, LM80_REG_TEMP_OS_MAX);
308set_temp(os_hyst, temp_os_hyst, LM80_REG_TEMP_OS_HYST);
309
6cc37ee5
JD		 310static ssize_t show_alarms(struct device *dev, struct device_attribute *attr,
311 char *buf)
1da177e4
LT		 312{
313 struct lm80_data *data = lm80_update_device(dev);
314 return sprintf(buf, "%u\n", data->alarms);
315}
316
e84542f5
JD		 317static ssize_t show_alarm(struct device *dev, struct device_attribute *attr,
318 char *buf)
319{
320 int bitnr = to_sensor_dev_attr(attr)->index;
321 struct lm80_data *data = lm80_update_device(dev);
322 return sprintf(buf, "%u\n", (data->alarms >> bitnr) & 1);
323}
324
f8181762
JD		 325static SENSOR_DEVICE_ATTR(in0_min, S_IWUSR | S_IRUGO,
326 show_in_min, set_in_min, 0);
327static SENSOR_DEVICE_ATTR(in1_min, S_IWUSR | S_IRUGO,
328 show_in_min, set_in_min, 1);
329static SENSOR_DEVICE_ATTR(in2_min, S_IWUSR | S_IRUGO,
330 show_in_min, set_in_min, 2);
331static SENSOR_DEVICE_ATTR(in3_min, S_IWUSR | S_IRUGO,
332 show_in_min, set_in_min, 3);
333static SENSOR_DEVICE_ATTR(in4_min, S_IWUSR | S_IRUGO,
334 show_in_min, set_in_min, 4);
335static SENSOR_DEVICE_ATTR(in5_min, S_IWUSR | S_IRUGO,
336 show_in_min, set_in_min, 5);
337static SENSOR_DEVICE_ATTR(in6_min, S_IWUSR | S_IRUGO,
338 show_in_min, set_in_min, 6);
339static SENSOR_DEVICE_ATTR(in0_max, S_IWUSR | S_IRUGO,
340 show_in_max, set_in_max, 0);
341static SENSOR_DEVICE_ATTR(in1_max, S_IWUSR | S_IRUGO,
342 show_in_max, set_in_max, 1);
343static SENSOR_DEVICE_ATTR(in2_max, S_IWUSR | S_IRUGO,
344 show_in_max, set_in_max, 2);
345static SENSOR_DEVICE_ATTR(in3_max, S_IWUSR | S_IRUGO,
346 show_in_max, set_in_max, 3);
347static SENSOR_DEVICE_ATTR(in4_max, S_IWUSR | S_IRUGO,
348 show_in_max, set_in_max, 4);
349static SENSOR_DEVICE_ATTR(in5_max, S_IWUSR | S_IRUGO,
350 show_in_max, set_in_max, 5);
351static SENSOR_DEVICE_ATTR(in6_max, S_IWUSR | S_IRUGO,
352 show_in_max, set_in_max, 6);
353static SENSOR_DEVICE_ATTR(in0_input, S_IRUGO, show_in_input, NULL, 0);
354static SENSOR_DEVICE_ATTR(in1_input, S_IRUGO, show_in_input, NULL, 1);
355static SENSOR_DEVICE_ATTR(in2_input, S_IRUGO, show_in_input, NULL, 2);
356static SENSOR_DEVICE_ATTR(in3_input, S_IRUGO, show_in_input, NULL, 3);
357static SENSOR_DEVICE_ATTR(in4_input, S_IRUGO, show_in_input, NULL, 4);
358static SENSOR_DEVICE_ATTR(in5_input, S_IRUGO, show_in_input, NULL, 5);
359static SENSOR_DEVICE_ATTR(in6_input, S_IRUGO, show_in_input, NULL, 6);
360static SENSOR_DEVICE_ATTR(fan1_min, S_IWUSR | S_IRUGO,
361 show_fan_min, set_fan_min, 0);
362static SENSOR_DEVICE_ATTR(fan2_min, S_IWUSR | S_IRUGO,
363 show_fan_min, set_fan_min, 1);
364static SENSOR_DEVICE_ATTR(fan1_input, S_IRUGO, show_fan_input, NULL, 0);
365static SENSOR_DEVICE_ATTR(fan2_input, S_IRUGO, show_fan_input, NULL, 1);
366static SENSOR_DEVICE_ATTR(fan1_div, S_IWUSR | S_IRUGO,
367 show_fan_div, set_fan_div, 0);
368static SENSOR_DEVICE_ATTR(fan2_div, S_IWUSR | S_IRUGO,
369 show_fan_div, set_fan_div, 1);
1da177e4
LT		 370static DEVICE_ATTR(temp1_input, S_IRUGO, show_temp_input1, NULL);
371static DEVICE_ATTR(temp1_max, S_IWUSR | S_IRUGO, show_temp_hot_max,
372 set_temp_hot_max);
373static DEVICE_ATTR(temp1_max_hyst, S_IWUSR | S_IRUGO, show_temp_hot_hyst,
374 set_temp_hot_hyst);
375static DEVICE_ATTR(temp1_crit, S_IWUSR | S_IRUGO, show_temp_os_max,
376 set_temp_os_max);
377static DEVICE_ATTR(temp1_crit_hyst, S_IWUSR | S_IRUGO, show_temp_os_hyst,
378 set_temp_os_hyst);
379static DEVICE_ATTR(alarms, S_IRUGO, show_alarms, NULL);
e84542f5
JD		 380static SENSOR_DEVICE_ATTR(in0_alarm, S_IRUGO, show_alarm, NULL, 0);
381static SENSOR_DEVICE_ATTR(in1_alarm, S_IRUGO, show_alarm, NULL, 1);
382static SENSOR_DEVICE_ATTR(in2_alarm, S_IRUGO, show_alarm, NULL, 2);
383static SENSOR_DEVICE_ATTR(in3_alarm, S_IRUGO, show_alarm, NULL, 3);
384static SENSOR_DEVICE_ATTR(in4_alarm, S_IRUGO, show_alarm, NULL, 4);
385static SENSOR_DEVICE_ATTR(in5_alarm, S_IRUGO, show_alarm, NULL, 5);
386static SENSOR_DEVICE_ATTR(in6_alarm, S_IRUGO, show_alarm, NULL, 6);
387static SENSOR_DEVICE_ATTR(fan1_alarm, S_IRUGO, show_alarm, NULL, 10);
388static SENSOR_DEVICE_ATTR(fan2_alarm, S_IRUGO, show_alarm, NULL, 11);
389static SENSOR_DEVICE_ATTR(temp1_max_alarm, S_IRUGO, show_alarm, NULL, 8);
390static SENSOR_DEVICE_ATTR(temp1_crit_alarm, S_IRUGO, show_alarm, NULL, 13);
1da177e4
LT		 391
392/*
393 * Real code
394 */
395
0501a381 396static struct attribute *lm80_attributes[] = {
f8181762
JD		 397 &sensor_dev_attr_in0_min.dev_attr.attr,
398 &sensor_dev_attr_in1_min.dev_attr.attr,
399 &sensor_dev_attr_in2_min.dev_attr.attr,
400 &sensor_dev_attr_in3_min.dev_attr.attr,
401 &sensor_dev_attr_in4_min.dev_attr.attr,
402 &sensor_dev_attr_in5_min.dev_attr.attr,
403 &sensor_dev_attr_in6_min.dev_attr.attr,
404 &sensor_dev_attr_in0_max.dev_attr.attr,
405 &sensor_dev_attr_in1_max.dev_attr.attr,
406 &sensor_dev_attr_in2_max.dev_attr.attr,
407 &sensor_dev_attr_in3_max.dev_attr.attr,
408 &sensor_dev_attr_in4_max.dev_attr.attr,
409 &sensor_dev_attr_in5_max.dev_attr.attr,
410 &sensor_dev_attr_in6_max.dev_attr.attr,
411 &sensor_dev_attr_in0_input.dev_attr.attr,
412 &sensor_dev_attr_in1_input.dev_attr.attr,
413 &sensor_dev_attr_in2_input.dev_attr.attr,
414 &sensor_dev_attr_in3_input.dev_attr.attr,
415 &sensor_dev_attr_in4_input.dev_attr.attr,
416 &sensor_dev_attr_in5_input.dev_attr.attr,
417 &sensor_dev_attr_in6_input.dev_attr.attr,
418 &sensor_dev_attr_fan1_min.dev_attr.attr,
419 &sensor_dev_attr_fan2_min.dev_attr.attr,
420 &sensor_dev_attr_fan1_input.dev_attr.attr,
421 &sensor_dev_attr_fan2_input.dev_attr.attr,
422 &sensor_dev_attr_fan1_div.dev_attr.attr,
423 &sensor_dev_attr_fan2_div.dev_attr.attr,
0501a381
MH		 424 &dev_attr_temp1_input.attr,
425 &dev_attr_temp1_max.attr,
426 &dev_attr_temp1_max_hyst.attr,
427 &dev_attr_temp1_crit.attr,
428 &dev_attr_temp1_crit_hyst.attr,
429 &dev_attr_alarms.attr,
e84542f5
JD		 430 &sensor_dev_attr_in0_alarm.dev_attr.attr,
431 &sensor_dev_attr_in1_alarm.dev_attr.attr,
432 &sensor_dev_attr_in2_alarm.dev_attr.attr,
433 &sensor_dev_attr_in3_alarm.dev_attr.attr,
434 &sensor_dev_attr_in4_alarm.dev_attr.attr,
435 &sensor_dev_attr_in5_alarm.dev_attr.attr,
436 &sensor_dev_attr_in6_alarm.dev_attr.attr,
437 &sensor_dev_attr_fan1_alarm.dev_attr.attr,
438 &sensor_dev_attr_fan2_alarm.dev_attr.attr,
439 &sensor_dev_attr_temp1_max_alarm.dev_attr.attr,
440 &sensor_dev_attr_temp1_crit_alarm.dev_attr.attr,
0501a381
MH		 441 NULL
442};
443
444static const struct attribute_group lm80_group = {
445 .attrs = lm80_attributes,
446};
447
8c8bacc8 448/* Return 0 if detection is successful, -ENODEV otherwise */
310ec792 449static int lm80_detect(struct i2c_client *client, struct i2c_board_info *info)
1da177e4 450{
8c8bacc8 451 struct i2c_adapter *adapter = client->adapter;
1da177e4 452 int i, cur;
1da177e4
LT		 453
454 if (!i2c_check_functionality(adapter, I2C_FUNC_SMBUS_BYTE_DATA))
8c8bacc8 455 return -ENODEV;
1da177e4
LT		 456
457 /* Now, we do the remaining detection. It is lousy. */
6cc37ee5 458 if (lm80_read_value(client, LM80_REG_ALARM2) & 0xc0)
8c8bacc8 459 return -ENODEV;
1da177e4 460 for (i = 0x2a; i <= 0x3d; i++) {
6cc37ee5
JD		 461 cur = i2c_smbus_read_byte_data(client, i);
462 if ((i2c_smbus_read_byte_data(client, i + 0x40) != cur)
463 || (i2c_smbus_read_byte_data(client, i + 0x80) != cur)
464 || (i2c_smbus_read_byte_data(client, i + 0xc0) != cur))
8c8bacc8 465 return -ENODEV;
1da177e4
LT		 466 }
467
8c8bacc8 468 strlcpy(info->type, "lm80", I2C_NAME_SIZE);
1da177e4 469
8c8bacc8
JD		 470 return 0;
471}
1da177e4 472
8c8bacc8
JD		 473static int lm80_probe(struct i2c_client *client,
474 const struct i2c_device_id *id)
475{
476 struct lm80_data *data;
477 int err;
478
479 data = kzalloc(sizeof(struct lm80_data), GFP_KERNEL);
480 if (!data) {
481 err = -ENOMEM;
482 goto exit;
483 }
484
485 i2c_set_clientdata(client, data);
486 mutex_init(&data->update_lock);
1da177e4
LT		 487
488 /* Initialize the LM80 chip */
6cc37ee5 489 lm80_init_client(client);
1da177e4
LT		 490
491 /* A few vars need to be filled upon startup */
6cc37ee5
JD		 492 data->fan_min[0] = lm80_read_value(client, LM80_REG_FAN_MIN(1));
493 data->fan_min[1] = lm80_read_value(client, LM80_REG_FAN_MIN(2));
1da177e4
LT		 494
495 /* Register sysfs hooks */
6cc37ee5 496 if ((err = sysfs_create_group(&client->dev.kobj, &lm80_group)))
8c8bacc8 497 goto error_free;
0501a381 498
6cc37ee5 499 data->hwmon_dev = hwmon_device_register(&client->dev);
1beeffe4
TJ		 500 if (IS_ERR(data->hwmon_dev)) {
501 err = PTR_ERR(data->hwmon_dev);
0501a381 502 goto error_remove;
943b0830
MH		 503 }
504
1da177e4
LT		 505 return 0;
506
0501a381 507error_remove:
6cc37ee5 508 sysfs_remove_group(&client->dev.kobj, &lm80_group);
1da177e4
LT		 509error_free:
510 kfree(data);
511exit:
512 return err;
513}
514
8c8bacc8 515static int lm80_remove(struct i2c_client *client)
1da177e4 516{
943b0830 517 struct lm80_data *data = i2c_get_clientdata(client);
1da177e4 518
1beeffe4 519 hwmon_device_unregister(data->hwmon_dev);
0501a381 520 sysfs_remove_group(&client->dev.kobj, &lm80_group);
1da177e4 521
943b0830 522 kfree(data);
1da177e4
LT		 523 return 0;
524}
525
526static int lm80_read_value(struct i2c_client *client, u8 reg)
527{
528 return i2c_smbus_read_byte_data(client, reg);
529}
530
531static int lm80_write_value(struct i2c_client *client, u8 reg, u8 value)
532{
533 return i2c_smbus_write_byte_data(client, reg, value);
534}
535
536/* Called when we have found a new LM80. */
537static void lm80_init_client(struct i2c_client *client)
538{
539 /* Reset all except Watchdog values and last conversion values
540 This sets fan-divs to 2, among others. This makes most other
541 initializations unnecessary */
542 lm80_write_value(client, LM80_REG_CONFIG, 0x80);
543 /* Set 11-bit temperature resolution */
544 lm80_write_value(client, LM80_REG_RES, 0x08);
545
546 /* Start monitoring */
547 lm80_write_value(client, LM80_REG_CONFIG, 0x01);
548}
549
550static struct lm80_data *lm80_update_device(struct device *dev)
551{
552 struct i2c_client *client = to_i2c_client(dev);
553 struct lm80_data *data = i2c_get_clientdata(client);
554 int i;
555
9a61bf63 556 mutex_lock(&data->update_lock);
1da177e4
LT		 557
558 if (time_after(jiffies, data->last_updated + 2 * HZ) || !data->valid) {
559 dev_dbg(&client->dev, "Starting lm80 update\n");
560 for (i = 0; i <= 6; i++) {
561 data->in[i] =
562 lm80_read_value(client, LM80_REG_IN(i));
563 data->in_min[i] =
564 lm80_read_value(client, LM80_REG_IN_MIN(i));
565 data->in_max[i] =
566 lm80_read_value(client, LM80_REG_IN_MAX(i));
567 }
568 data->fan[0] = lm80_read_value(client, LM80_REG_FAN1);
569 data->fan_min[0] =
570 lm80_read_value(client, LM80_REG_FAN_MIN(1));
571 data->fan[1] = lm80_read_value(client, LM80_REG_FAN2);
572 data->fan_min[1] =
573 lm80_read_value(client, LM80_REG_FAN_MIN(2));
574
575 data->temp =
576 (lm80_read_value(client, LM80_REG_TEMP) << 8) |
577 (lm80_read_value(client, LM80_REG_RES) & 0xf0);
578 data->temp_os_max =
579 lm80_read_value(client, LM80_REG_TEMP_OS_MAX);
580 data->temp_os_hyst =
581 lm80_read_value(client, LM80_REG_TEMP_OS_HYST);
582 data->temp_hot_max =
583 lm80_read_value(client, LM80_REG_TEMP_HOT_MAX);
584 data->temp_hot_hyst =
585 lm80_read_value(client, LM80_REG_TEMP_HOT_HYST);
586
587 i = lm80_read_value(client, LM80_REG_FANDIV);
588 data->fan_div[0] = (i >> 2) & 0x03;
589 data->fan_div[1] = (i >> 4) & 0x03;
590 data->alarms = lm80_read_value(client, LM80_REG_ALARM1) +
591 (lm80_read_value(client, LM80_REG_ALARM2) << 8);
592 data->last_updated = jiffies;
593 data->valid = 1;
594 }
595
9a61bf63 596 mutex_unlock(&data->update_lock);
1da177e4
LT		 597
598 return data;
599}
600
601static int __init sensors_lm80_init(void)
602{
603 return i2c_add_driver(&lm80_driver);
604}
605
606static void __exit sensors_lm80_exit(void)
607{
608 i2c_del_driver(&lm80_driver);
609}
610
611MODULE_AUTHOR("Frodo Looijaard <frodol@dds.nl> and "
612 "Philip Edelbrock <phil@netroedge.com>");
613MODULE_DESCRIPTION("LM80 driver");
614MODULE_LICENSE("GPL");
615
616module_init(sensors_lm80_init);
617module_exit(sensors_lm80_exit);
Linux kernel - Deliverables
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