blob: eba89aac3ecefbce3783329a546e5a66682bda94 [file] [log] [blame]
Linus Torvalds1da177e2005-04-16 15:20:36 -07001/*
2 * lm80.c - From lm_sensors, Linux kernel modules for hardware
Guenter Roeck11606312012-01-19 11:02:20 -08003 * monitoring
Linus Torvalds1da177e2005-04-16 15:20:36 -07004 * Copyright (C) 1998, 1999 Frodo Looijaard <frodol@dds.nl>
Guenter Roeck11606312012-01-19 11:02:20 -08005 * and Philip Edelbrock <phil@netroedge.com>
Linus Torvalds1da177e2005-04-16 15:20:36 -07006 *
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
Linus Torvalds1da177e2005-04-16 15:20:36 -070024#include <linux/module.h>
25#include <linux/init.h>
26#include <linux/slab.h>
27#include <linux/jiffies.h>
28#include <linux/i2c.h>
Mark M. Hoffman943b0832005-07-15 21:39:18 -040029#include <linux/hwmon.h>
Jean Delvaref8181762008-01-05 15:37:05 +010030#include <linux/hwmon-sysfs.h>
Mark M. Hoffman943b0832005-07-15 21:39:18 -040031#include <linux/err.h>
Ingo Molnar9a61bf62006-01-18 23:19:26 +010032#include <linux/mutex.h>
Linus Torvalds1da177e2005-04-16 15:20:36 -070033
34/* Addresses to scan */
Mark M. Hoffman25e9c862008-02-17 22:28:03 -050035static const unsigned short normal_i2c[] = { 0x28, 0x29, 0x2a, 0x2b, 0x2c, 0x2d,
36 0x2e, 0x2f, I2C_CLIENT_END };
Linus Torvalds1da177e2005-04-16 15:20:36 -070037
Linus Torvalds1da177e2005-04-16 15:20:36 -070038/* Many LM80 constants specified below */
39
40/* The LM80 registers */
41#define LM80_REG_IN_MAX(nr) (0x2a + (nr) * 2)
42#define LM80_REG_IN_MIN(nr) (0x2b + (nr) * 2)
43#define LM80_REG_IN(nr) (0x20 + (nr))
44
45#define LM80_REG_FAN1 0x28
46#define LM80_REG_FAN2 0x29
47#define LM80_REG_FAN_MIN(nr) (0x3b + (nr))
48
49#define LM80_REG_TEMP 0x27
50#define LM80_REG_TEMP_HOT_MAX 0x38
51#define LM80_REG_TEMP_HOT_HYST 0x39
52#define LM80_REG_TEMP_OS_MAX 0x3a
53#define LM80_REG_TEMP_OS_HYST 0x3b
54
55#define LM80_REG_CONFIG 0x00
56#define LM80_REG_ALARM1 0x01
57#define LM80_REG_ALARM2 0x02
58#define LM80_REG_MASK1 0x03
59#define LM80_REG_MASK2 0x04
60#define LM80_REG_FANDIV 0x05
61#define LM80_REG_RES 0x06
62
Jean Delvare9908ad42012-01-31 09:27:11 -050063#define LM96080_REG_CONV_RATE 0x07
64#define LM96080_REG_MAN_ID 0x3e
65#define LM96080_REG_DEV_ID 0x3f
66
Linus Torvalds1da177e2005-04-16 15:20:36 -070067
Guenter Roeck11606312012-01-19 11:02:20 -080068/*
69 * Conversions. Rounding and limit checking is only done on the TO_REG
70 * variants. Note that you should be a bit careful with which arguments
71 * these macros are called: arguments may be evaluated more than once.
72 * Fixing this is just not worth it.
73 */
Linus Torvalds1da177e2005-04-16 15:20:36 -070074
Guenter Roeck2a844c12013-01-09 08:09:34 -080075#define IN_TO_REG(val) (clamp_val(((val) + 5) / 10, 0, 255))
Frans Meulenbroeks66b3b1f2012-01-04 20:58:53 +010076#define IN_FROM_REG(val) ((val) * 10)
Linus Torvalds1da177e2005-04-16 15:20:36 -070077
78static inline unsigned char FAN_TO_REG(unsigned rpm, unsigned div)
79{
80 if (rpm == 0)
81 return 255;
Guenter Roeck2a844c12013-01-09 08:09:34 -080082 rpm = clamp_val(rpm, 1, 1000000);
83 return clamp_val((1350000 + rpm * div / 2) / (rpm * div), 1, 254);
Linus Torvalds1da177e2005-04-16 15:20:36 -070084}
85
Frans Meulenbroeks66b3b1f2012-01-04 20:58:53 +010086#define FAN_FROM_REG(val, div) ((val) == 0 ? -1 : \
87 (val) == 255 ? 0 : 1350000/((div) * (val)))
Linus Torvalds1da177e2005-04-16 15:20:36 -070088
89static inline long TEMP_FROM_REG(u16 temp)
90{
91 long res;
92
93 temp >>= 4;
94 if (temp < 0x0800)
95 res = 625 * (long) temp;
96 else
97 res = ((long) temp - 0x01000) * 625;
98
99 return res / 10;
100}
101
Frans Meulenbroeks66b3b1f2012-01-04 20:58:53 +0100102#define TEMP_LIMIT_FROM_REG(val) (((val) > 0x80 ? \
103 (val) - 0x100 : (val)) * 1000)
Linus Torvalds1da177e2005-04-16 15:20:36 -0700104
Guenter Roeck2a844c12013-01-09 08:09:34 -0800105#define TEMP_LIMIT_TO_REG(val) clamp_val((val) < 0 ? \
Frans Meulenbroeks66b3b1f2012-01-04 20:58:53 +0100106 ((val) - 500) / 1000 : ((val) + 500) / 1000, 0, 255)
Linus Torvalds1da177e2005-04-16 15:20:36 -0700107
108#define DIV_FROM_REG(val) (1 << (val))
109
110/*
111 * Client data (each client gets its own)
112 */
113
114struct lm80_data {
Tony Jones1beeffe2007-08-20 13:46:20 -0700115 struct device *hwmon_dev;
Ingo Molnar9a61bf62006-01-18 23:19:26 +0100116 struct mutex update_lock;
Frans Meulenbroeks96585f12012-01-10 15:49:36 +0100117 char error; /* !=0 if error occurred during last update */
Linus Torvalds1da177e2005-04-16 15:20:36 -0700118 char valid; /* !=0 if following fields are valid */
119 unsigned long last_updated; /* In jiffies */
120
121 u8 in[7]; /* Register value */
122 u8 in_max[7]; /* Register value */
123 u8 in_min[7]; /* Register value */
124 u8 fan[2]; /* Register value */
125 u8 fan_min[2]; /* Register value */
126 u8 fan_div[2]; /* Register encoding, shifted right */
127 u16 temp; /* Register values, shifted right */
128 u8 temp_hot_max; /* Register value */
129 u8 temp_hot_hyst; /* Register value */
130 u8 temp_os_max; /* Register value */
131 u8 temp_os_hyst; /* Register value */
132 u16 alarms; /* Register encoding, combined */
133};
134
Jean Delvare6cc37ee2008-01-05 15:35:09 +0100135/*
Linus Torvalds1da177e2005-04-16 15:20:36 -0700136 * Functions declaration
137 */
138
Jean Delvare8c8bacc2008-07-16 19:30:14 +0200139static int lm80_probe(struct i2c_client *client,
140 const struct i2c_device_id *id);
Jean Delvare310ec792009-12-14 21:17:23 +0100141static int lm80_detect(struct i2c_client *client, struct i2c_board_info *info);
Linus Torvalds1da177e2005-04-16 15:20:36 -0700142static void lm80_init_client(struct i2c_client *client);
Jean Delvare8c8bacc2008-07-16 19:30:14 +0200143static int lm80_remove(struct i2c_client *client);
Linus Torvalds1da177e2005-04-16 15:20:36 -0700144static struct lm80_data *lm80_update_device(struct device *dev);
145static int lm80_read_value(struct i2c_client *client, u8 reg);
146static int lm80_write_value(struct i2c_client *client, u8 reg, u8 value);
147
148/*
149 * Driver data (common to all clients)
150 */
151
Jean Delvare8c8bacc2008-07-16 19:30:14 +0200152static const struct i2c_device_id lm80_id[] = {
Jean Delvare1f86df42009-12-14 21:17:26 +0100153 { "lm80", 0 },
Jean Delvare9908ad42012-01-31 09:27:11 -0500154 { "lm96080", 1 },
Jean Delvare8c8bacc2008-07-16 19:30:14 +0200155 { }
156};
157MODULE_DEVICE_TABLE(i2c, lm80_id);
158
Linus Torvalds1da177e2005-04-16 15:20:36 -0700159static struct i2c_driver lm80_driver = {
Jean Delvare8c8bacc2008-07-16 19:30:14 +0200160 .class = I2C_CLASS_HWMON,
Laurent Riffardcdaf7932005-11-26 20:37:41 +0100161 .driver = {
Laurent Riffardcdaf7932005-11-26 20:37:41 +0100162 .name = "lm80",
163 },
Jean Delvare8c8bacc2008-07-16 19:30:14 +0200164 .probe = lm80_probe,
165 .remove = lm80_remove,
166 .id_table = lm80_id,
167 .detect = lm80_detect,
Jean Delvarec3813d62009-12-14 21:17:25 +0100168 .address_list = normal_i2c,
Linus Torvalds1da177e2005-04-16 15:20:36 -0700169};
170
171/*
172 * Sysfs stuff
173 */
174
175#define show_in(suffix, value) \
Frans Meulenbroeks66b3b1f2012-01-04 20:58:53 +0100176static ssize_t show_in_##suffix(struct device *dev, \
177 struct device_attribute *attr, char *buf) \
Linus Torvalds1da177e2005-04-16 15:20:36 -0700178{ \
Jean Delvaref8181762008-01-05 15:37:05 +0100179 int nr = to_sensor_dev_attr(attr)->index; \
Linus Torvalds1da177e2005-04-16 15:20:36 -0700180 struct lm80_data *data = lm80_update_device(dev); \
Frans Meulenbroeks2faaa932012-01-05 14:41:53 +0100181 if (IS_ERR(data)) \
182 return PTR_ERR(data); \
Jean Delvaref8181762008-01-05 15:37:05 +0100183 return sprintf(buf, "%d\n", IN_FROM_REG(data->value[nr])); \
Linus Torvalds1da177e2005-04-16 15:20:36 -0700184}
Jean Delvaref8181762008-01-05 15:37:05 +0100185show_in(min, in_min)
186show_in(max, in_max)
187show_in(input, in)
Linus Torvalds1da177e2005-04-16 15:20:36 -0700188
189#define set_in(suffix, value, reg) \
Frans Meulenbroeks66b3b1f2012-01-04 20:58:53 +0100190static ssize_t set_in_##suffix(struct device *dev, \
191 struct device_attribute *attr, const char *buf, size_t count) \
Linus Torvalds1da177e2005-04-16 15:20:36 -0700192{ \
Jean Delvaref8181762008-01-05 15:37:05 +0100193 int nr = to_sensor_dev_attr(attr)->index; \
Linus Torvalds1da177e2005-04-16 15:20:36 -0700194 struct i2c_client *client = to_i2c_client(dev); \
195 struct lm80_data *data = i2c_get_clientdata(client); \
Frans Meulenbroeks6a9e7c4c2012-01-10 15:49:35 +0100196 long val; \
197 int err = kstrtol(buf, 10, &val); \
198 if (err < 0) \
199 return err; \
Frans Meulenbroeks66b3b1f2012-01-04 20:58:53 +0100200\
Ingo Molnar9a61bf62006-01-18 23:19:26 +0100201 mutex_lock(&data->update_lock);\
Jean Delvaref8181762008-01-05 15:37:05 +0100202 data->value[nr] = IN_TO_REG(val); \
203 lm80_write_value(client, reg(nr), data->value[nr]); \
Ingo Molnar9a61bf62006-01-18 23:19:26 +0100204 mutex_unlock(&data->update_lock);\
Linus Torvalds1da177e2005-04-16 15:20:36 -0700205 return count; \
206}
Jean Delvaref8181762008-01-05 15:37:05 +0100207set_in(min, in_min, LM80_REG_IN_MIN)
208set_in(max, in_max, LM80_REG_IN_MAX)
Linus Torvalds1da177e2005-04-16 15:20:36 -0700209
Jean Delvaref8181762008-01-05 15:37:05 +0100210#define show_fan(suffix, value) \
Frans Meulenbroeks66b3b1f2012-01-04 20:58:53 +0100211static ssize_t show_fan_##suffix(struct device *dev, \
212 struct device_attribute *attr, char *buf) \
Linus Torvalds1da177e2005-04-16 15:20:36 -0700213{ \
Jean Delvaref8181762008-01-05 15:37:05 +0100214 int nr = to_sensor_dev_attr(attr)->index; \
Linus Torvalds1da177e2005-04-16 15:20:36 -0700215 struct lm80_data *data = lm80_update_device(dev); \
Frans Meulenbroeks2faaa932012-01-05 14:41:53 +0100216 if (IS_ERR(data)) \
217 return PTR_ERR(data); \
Jean Delvaref8181762008-01-05 15:37:05 +0100218 return sprintf(buf, "%d\n", FAN_FROM_REG(data->value[nr], \
219 DIV_FROM_REG(data->fan_div[nr]))); \
Linus Torvalds1da177e2005-04-16 15:20:36 -0700220}
Jean Delvaref8181762008-01-05 15:37:05 +0100221show_fan(min, fan_min)
222show_fan(input, fan)
Linus Torvalds1da177e2005-04-16 15:20:36 -0700223
Jean Delvaref8181762008-01-05 15:37:05 +0100224static ssize_t show_fan_div(struct device *dev, struct device_attribute *attr,
225 char *buf)
226{
227 int nr = to_sensor_dev_attr(attr)->index;
228 struct lm80_data *data = lm80_update_device(dev);
Frans Meulenbroeks2faaa932012-01-05 14:41:53 +0100229 if (IS_ERR(data))
230 return PTR_ERR(data);
Jean Delvaref8181762008-01-05 15:37:05 +0100231 return sprintf(buf, "%d\n", DIV_FROM_REG(data->fan_div[nr]));
Linus Torvalds1da177e2005-04-16 15:20:36 -0700232}
Linus Torvalds1da177e2005-04-16 15:20:36 -0700233
Jean Delvaref8181762008-01-05 15:37:05 +0100234static ssize_t set_fan_min(struct device *dev, struct device_attribute *attr,
235 const char *buf, size_t count)
236{
237 int nr = to_sensor_dev_attr(attr)->index;
238 struct i2c_client *client = to_i2c_client(dev);
239 struct lm80_data *data = i2c_get_clientdata(client);
Frans Meulenbroeks6a9e7c4c2012-01-10 15:49:35 +0100240 unsigned long val;
241 int err = kstrtoul(buf, 10, &val);
242 if (err < 0)
243 return err;
Jean Delvaref8181762008-01-05 15:37:05 +0100244
245 mutex_lock(&data->update_lock);
246 data->fan_min[nr] = FAN_TO_REG(val, DIV_FROM_REG(data->fan_div[nr]));
247 lm80_write_value(client, LM80_REG_FAN_MIN(nr + 1), data->fan_min[nr]);
248 mutex_unlock(&data->update_lock);
249 return count;
Linus Torvalds1da177e2005-04-16 15:20:36 -0700250}
Linus Torvalds1da177e2005-04-16 15:20:36 -0700251
Guenter Roeck11606312012-01-19 11:02:20 -0800252/*
253 * Note: we save and restore the fan minimum here, because its value is
254 * determined in part by the fan divisor. This follows the principle of
255 * least surprise; the user doesn't expect the fan minimum to change just
256 * because the divisor changed.
257 */
Jean Delvaref8181762008-01-05 15:37:05 +0100258static ssize_t set_fan_div(struct device *dev, struct device_attribute *attr,
259 const char *buf, size_t count)
Linus Torvalds1da177e2005-04-16 15:20:36 -0700260{
Jean Delvaref8181762008-01-05 15:37:05 +0100261 int nr = to_sensor_dev_attr(attr)->index;
Linus Torvalds1da177e2005-04-16 15:20:36 -0700262 struct i2c_client *client = to_i2c_client(dev);
263 struct lm80_data *data = i2c_get_clientdata(client);
Frans Meulenbroeks6a9e7c4c2012-01-10 15:49:35 +0100264 unsigned long min, val;
Linus Torvalds1da177e2005-04-16 15:20:36 -0700265 u8 reg;
Frans Meulenbroeks6a9e7c4c2012-01-10 15:49:35 +0100266 int err = kstrtoul(buf, 10, &val);
267 if (err < 0)
268 return err;
Linus Torvalds1da177e2005-04-16 15:20:36 -0700269
270 /* Save fan_min */
Ingo Molnar9a61bf62006-01-18 23:19:26 +0100271 mutex_lock(&data->update_lock);
Linus Torvalds1da177e2005-04-16 15:20:36 -0700272 min = FAN_FROM_REG(data->fan_min[nr],
273 DIV_FROM_REG(data->fan_div[nr]));
274
275 switch (val) {
Frans Meulenbroeks66b3b1f2012-01-04 20:58:53 +0100276 case 1:
277 data->fan_div[nr] = 0;
278 break;
279 case 2:
280 data->fan_div[nr] = 1;
281 break;
282 case 4:
283 data->fan_div[nr] = 2;
284 break;
285 case 8:
286 data->fan_div[nr] = 3;
287 break;
Linus Torvalds1da177e2005-04-16 15:20:36 -0700288 default:
Guenter Roeckb55f3752013-01-10 10:01:24 -0800289 dev_err(&client->dev,
290 "fan_div value %ld not supported. Choose one of 1, 2, 4 or 8!\n",
291 val);
Ingo Molnar9a61bf62006-01-18 23:19:26 +0100292 mutex_unlock(&data->update_lock);
Linus Torvalds1da177e2005-04-16 15:20:36 -0700293 return -EINVAL;
294 }
295
296 reg = (lm80_read_value(client, LM80_REG_FANDIV) & ~(3 << (2 * (nr + 1))))
297 | (data->fan_div[nr] << (2 * (nr + 1)));
298 lm80_write_value(client, LM80_REG_FANDIV, reg);
299
300 /* Restore fan_min */
301 data->fan_min[nr] = FAN_TO_REG(min, DIV_FROM_REG(data->fan_div[nr]));
302 lm80_write_value(client, LM80_REG_FAN_MIN(nr + 1), data->fan_min[nr]);
Ingo Molnar9a61bf62006-01-18 23:19:26 +0100303 mutex_unlock(&data->update_lock);
Linus Torvalds1da177e2005-04-16 15:20:36 -0700304
305 return count;
306}
307
Frans Meulenbroeks66b3b1f2012-01-04 20:58:53 +0100308static ssize_t show_temp_input1(struct device *dev,
309 struct device_attribute *attr, char *buf)
Linus Torvalds1da177e2005-04-16 15:20:36 -0700310{
311 struct lm80_data *data = lm80_update_device(dev);
Frans Meulenbroeks2faaa932012-01-05 14:41:53 +0100312 if (IS_ERR(data))
313 return PTR_ERR(data);
Linus Torvalds1da177e2005-04-16 15:20:36 -0700314 return sprintf(buf, "%ld\n", TEMP_FROM_REG(data->temp));
315}
316
317#define show_temp(suffix, value) \
Frans Meulenbroeks66b3b1f2012-01-04 20:58:53 +0100318static ssize_t show_temp_##suffix(struct device *dev, \
319 struct device_attribute *attr, char *buf) \
Linus Torvalds1da177e2005-04-16 15:20:36 -0700320{ \
321 struct lm80_data *data = lm80_update_device(dev); \
Frans Meulenbroeks2faaa932012-01-05 14:41:53 +0100322 if (IS_ERR(data)) \
323 return PTR_ERR(data); \
Linus Torvalds1da177e2005-04-16 15:20:36 -0700324 return sprintf(buf, "%d\n", TEMP_LIMIT_FROM_REG(data->value)); \
325}
326show_temp(hot_max, temp_hot_max);
327show_temp(hot_hyst, temp_hot_hyst);
328show_temp(os_max, temp_os_max);
329show_temp(os_hyst, temp_os_hyst);
330
331#define set_temp(suffix, value, reg) \
Frans Meulenbroeks66b3b1f2012-01-04 20:58:53 +0100332static ssize_t set_temp_##suffix(struct device *dev, \
333 struct device_attribute *attr, const char *buf, size_t count) \
Linus Torvalds1da177e2005-04-16 15:20:36 -0700334{ \
335 struct i2c_client *client = to_i2c_client(dev); \
336 struct lm80_data *data = i2c_get_clientdata(client); \
Frans Meulenbroeks6a9e7c4c2012-01-10 15:49:35 +0100337 long val; \
338 int err = kstrtol(buf, 10, &val); \
339 if (err < 0) \
340 return err; \
Frans Meulenbroeks66b3b1f2012-01-04 20:58:53 +0100341\
Ingo Molnar9a61bf62006-01-18 23:19:26 +0100342 mutex_lock(&data->update_lock); \
Linus Torvalds1da177e2005-04-16 15:20:36 -0700343 data->value = TEMP_LIMIT_TO_REG(val); \
344 lm80_write_value(client, reg, data->value); \
Ingo Molnar9a61bf62006-01-18 23:19:26 +0100345 mutex_unlock(&data->update_lock); \
Linus Torvalds1da177e2005-04-16 15:20:36 -0700346 return count; \
347}
348set_temp(hot_max, temp_hot_max, LM80_REG_TEMP_HOT_MAX);
349set_temp(hot_hyst, temp_hot_hyst, LM80_REG_TEMP_HOT_HYST);
350set_temp(os_max, temp_os_max, LM80_REG_TEMP_OS_MAX);
351set_temp(os_hyst, temp_os_hyst, LM80_REG_TEMP_OS_HYST);
352
Jean Delvare6cc37ee2008-01-05 15:35:09 +0100353static ssize_t show_alarms(struct device *dev, struct device_attribute *attr,
354 char *buf)
Linus Torvalds1da177e2005-04-16 15:20:36 -0700355{
356 struct lm80_data *data = lm80_update_device(dev);
Frans Meulenbroeks2faaa932012-01-05 14:41:53 +0100357 if (IS_ERR(data))
358 return PTR_ERR(data);
Linus Torvalds1da177e2005-04-16 15:20:36 -0700359 return sprintf(buf, "%u\n", data->alarms);
360}
361
Jean Delvaree84542f2008-01-05 15:40:38 +0100362static ssize_t show_alarm(struct device *dev, struct device_attribute *attr,
363 char *buf)
364{
365 int bitnr = to_sensor_dev_attr(attr)->index;
366 struct lm80_data *data = lm80_update_device(dev);
Frans Meulenbroeks2faaa932012-01-05 14:41:53 +0100367 if (IS_ERR(data))
368 return PTR_ERR(data);
Jean Delvaree84542f2008-01-05 15:40:38 +0100369 return sprintf(buf, "%u\n", (data->alarms >> bitnr) & 1);
370}
371
Jean Delvaref8181762008-01-05 15:37:05 +0100372static SENSOR_DEVICE_ATTR(in0_min, S_IWUSR | S_IRUGO,
373 show_in_min, set_in_min, 0);
374static SENSOR_DEVICE_ATTR(in1_min, S_IWUSR | S_IRUGO,
375 show_in_min, set_in_min, 1);
376static SENSOR_DEVICE_ATTR(in2_min, S_IWUSR | S_IRUGO,
377 show_in_min, set_in_min, 2);
378static SENSOR_DEVICE_ATTR(in3_min, S_IWUSR | S_IRUGO,
379 show_in_min, set_in_min, 3);
380static SENSOR_DEVICE_ATTR(in4_min, S_IWUSR | S_IRUGO,
381 show_in_min, set_in_min, 4);
382static SENSOR_DEVICE_ATTR(in5_min, S_IWUSR | S_IRUGO,
383 show_in_min, set_in_min, 5);
384static SENSOR_DEVICE_ATTR(in6_min, S_IWUSR | S_IRUGO,
385 show_in_min, set_in_min, 6);
386static SENSOR_DEVICE_ATTR(in0_max, S_IWUSR | S_IRUGO,
387 show_in_max, set_in_max, 0);
388static SENSOR_DEVICE_ATTR(in1_max, S_IWUSR | S_IRUGO,
389 show_in_max, set_in_max, 1);
390static SENSOR_DEVICE_ATTR(in2_max, S_IWUSR | S_IRUGO,
391 show_in_max, set_in_max, 2);
392static SENSOR_DEVICE_ATTR(in3_max, S_IWUSR | S_IRUGO,
393 show_in_max, set_in_max, 3);
394static SENSOR_DEVICE_ATTR(in4_max, S_IWUSR | S_IRUGO,
395 show_in_max, set_in_max, 4);
396static SENSOR_DEVICE_ATTR(in5_max, S_IWUSR | S_IRUGO,
397 show_in_max, set_in_max, 5);
398static SENSOR_DEVICE_ATTR(in6_max, S_IWUSR | S_IRUGO,
399 show_in_max, set_in_max, 6);
400static SENSOR_DEVICE_ATTR(in0_input, S_IRUGO, show_in_input, NULL, 0);
401static SENSOR_DEVICE_ATTR(in1_input, S_IRUGO, show_in_input, NULL, 1);
402static SENSOR_DEVICE_ATTR(in2_input, S_IRUGO, show_in_input, NULL, 2);
403static SENSOR_DEVICE_ATTR(in3_input, S_IRUGO, show_in_input, NULL, 3);
404static SENSOR_DEVICE_ATTR(in4_input, S_IRUGO, show_in_input, NULL, 4);
405static SENSOR_DEVICE_ATTR(in5_input, S_IRUGO, show_in_input, NULL, 5);
406static SENSOR_DEVICE_ATTR(in6_input, S_IRUGO, show_in_input, NULL, 6);
407static SENSOR_DEVICE_ATTR(fan1_min, S_IWUSR | S_IRUGO,
408 show_fan_min, set_fan_min, 0);
409static SENSOR_DEVICE_ATTR(fan2_min, S_IWUSR | S_IRUGO,
410 show_fan_min, set_fan_min, 1);
411static SENSOR_DEVICE_ATTR(fan1_input, S_IRUGO, show_fan_input, NULL, 0);
412static SENSOR_DEVICE_ATTR(fan2_input, S_IRUGO, show_fan_input, NULL, 1);
413static SENSOR_DEVICE_ATTR(fan1_div, S_IWUSR | S_IRUGO,
414 show_fan_div, set_fan_div, 0);
415static SENSOR_DEVICE_ATTR(fan2_div, S_IWUSR | S_IRUGO,
416 show_fan_div, set_fan_div, 1);
Linus Torvalds1da177e2005-04-16 15:20:36 -0700417static DEVICE_ATTR(temp1_input, S_IRUGO, show_temp_input1, NULL);
418static DEVICE_ATTR(temp1_max, S_IWUSR | S_IRUGO, show_temp_hot_max,
Frans Meulenbroeks66b3b1f2012-01-04 20:58:53 +0100419 set_temp_hot_max);
Linus Torvalds1da177e2005-04-16 15:20:36 -0700420static DEVICE_ATTR(temp1_max_hyst, S_IWUSR | S_IRUGO, show_temp_hot_hyst,
Frans Meulenbroeks66b3b1f2012-01-04 20:58:53 +0100421 set_temp_hot_hyst);
Linus Torvalds1da177e2005-04-16 15:20:36 -0700422static DEVICE_ATTR(temp1_crit, S_IWUSR | S_IRUGO, show_temp_os_max,
Frans Meulenbroeks66b3b1f2012-01-04 20:58:53 +0100423 set_temp_os_max);
Linus Torvalds1da177e2005-04-16 15:20:36 -0700424static DEVICE_ATTR(temp1_crit_hyst, S_IWUSR | S_IRUGO, show_temp_os_hyst,
Frans Meulenbroeks66b3b1f2012-01-04 20:58:53 +0100425 set_temp_os_hyst);
Linus Torvalds1da177e2005-04-16 15:20:36 -0700426static DEVICE_ATTR(alarms, S_IRUGO, show_alarms, NULL);
Jean Delvaree84542f2008-01-05 15:40:38 +0100427static SENSOR_DEVICE_ATTR(in0_alarm, S_IRUGO, show_alarm, NULL, 0);
428static SENSOR_DEVICE_ATTR(in1_alarm, S_IRUGO, show_alarm, NULL, 1);
429static SENSOR_DEVICE_ATTR(in2_alarm, S_IRUGO, show_alarm, NULL, 2);
430static SENSOR_DEVICE_ATTR(in3_alarm, S_IRUGO, show_alarm, NULL, 3);
431static SENSOR_DEVICE_ATTR(in4_alarm, S_IRUGO, show_alarm, NULL, 4);
432static SENSOR_DEVICE_ATTR(in5_alarm, S_IRUGO, show_alarm, NULL, 5);
433static SENSOR_DEVICE_ATTR(in6_alarm, S_IRUGO, show_alarm, NULL, 6);
434static SENSOR_DEVICE_ATTR(fan1_alarm, S_IRUGO, show_alarm, NULL, 10);
435static SENSOR_DEVICE_ATTR(fan2_alarm, S_IRUGO, show_alarm, NULL, 11);
436static SENSOR_DEVICE_ATTR(temp1_max_alarm, S_IRUGO, show_alarm, NULL, 8);
437static SENSOR_DEVICE_ATTR(temp1_crit_alarm, S_IRUGO, show_alarm, NULL, 13);
Linus Torvalds1da177e2005-04-16 15:20:36 -0700438
439/*
440 * Real code
441 */
442
Mark M. Hoffman0501a382006-09-24 21:14:35 +0200443static struct attribute *lm80_attributes[] = {
Jean Delvaref8181762008-01-05 15:37:05 +0100444 &sensor_dev_attr_in0_min.dev_attr.attr,
445 &sensor_dev_attr_in1_min.dev_attr.attr,
446 &sensor_dev_attr_in2_min.dev_attr.attr,
447 &sensor_dev_attr_in3_min.dev_attr.attr,
448 &sensor_dev_attr_in4_min.dev_attr.attr,
449 &sensor_dev_attr_in5_min.dev_attr.attr,
450 &sensor_dev_attr_in6_min.dev_attr.attr,
451 &sensor_dev_attr_in0_max.dev_attr.attr,
452 &sensor_dev_attr_in1_max.dev_attr.attr,
453 &sensor_dev_attr_in2_max.dev_attr.attr,
454 &sensor_dev_attr_in3_max.dev_attr.attr,
455 &sensor_dev_attr_in4_max.dev_attr.attr,
456 &sensor_dev_attr_in5_max.dev_attr.attr,
457 &sensor_dev_attr_in6_max.dev_attr.attr,
458 &sensor_dev_attr_in0_input.dev_attr.attr,
459 &sensor_dev_attr_in1_input.dev_attr.attr,
460 &sensor_dev_attr_in2_input.dev_attr.attr,
461 &sensor_dev_attr_in3_input.dev_attr.attr,
462 &sensor_dev_attr_in4_input.dev_attr.attr,
463 &sensor_dev_attr_in5_input.dev_attr.attr,
464 &sensor_dev_attr_in6_input.dev_attr.attr,
465 &sensor_dev_attr_fan1_min.dev_attr.attr,
466 &sensor_dev_attr_fan2_min.dev_attr.attr,
467 &sensor_dev_attr_fan1_input.dev_attr.attr,
468 &sensor_dev_attr_fan2_input.dev_attr.attr,
469 &sensor_dev_attr_fan1_div.dev_attr.attr,
470 &sensor_dev_attr_fan2_div.dev_attr.attr,
Mark M. Hoffman0501a382006-09-24 21:14:35 +0200471 &dev_attr_temp1_input.attr,
472 &dev_attr_temp1_max.attr,
473 &dev_attr_temp1_max_hyst.attr,
474 &dev_attr_temp1_crit.attr,
475 &dev_attr_temp1_crit_hyst.attr,
476 &dev_attr_alarms.attr,
Jean Delvaree84542f2008-01-05 15:40:38 +0100477 &sensor_dev_attr_in0_alarm.dev_attr.attr,
478 &sensor_dev_attr_in1_alarm.dev_attr.attr,
479 &sensor_dev_attr_in2_alarm.dev_attr.attr,
480 &sensor_dev_attr_in3_alarm.dev_attr.attr,
481 &sensor_dev_attr_in4_alarm.dev_attr.attr,
482 &sensor_dev_attr_in5_alarm.dev_attr.attr,
483 &sensor_dev_attr_in6_alarm.dev_attr.attr,
484 &sensor_dev_attr_fan1_alarm.dev_attr.attr,
485 &sensor_dev_attr_fan2_alarm.dev_attr.attr,
486 &sensor_dev_attr_temp1_max_alarm.dev_attr.attr,
487 &sensor_dev_attr_temp1_crit_alarm.dev_attr.attr,
Mark M. Hoffman0501a382006-09-24 21:14:35 +0200488 NULL
489};
490
491static const struct attribute_group lm80_group = {
492 .attrs = lm80_attributes,
493};
494
Jean Delvare8c8bacc2008-07-16 19:30:14 +0200495/* Return 0 if detection is successful, -ENODEV otherwise */
Jean Delvare310ec792009-12-14 21:17:23 +0100496static int lm80_detect(struct i2c_client *client, struct i2c_board_info *info)
Linus Torvalds1da177e2005-04-16 15:20:36 -0700497{
Jean Delvare8c8bacc2008-07-16 19:30:14 +0200498 struct i2c_adapter *adapter = client->adapter;
Jean Delvare9908ad42012-01-31 09:27:11 -0500499 int i, cur, man_id, dev_id;
500 const char *name = NULL;
Linus Torvalds1da177e2005-04-16 15:20:36 -0700501
502 if (!i2c_check_functionality(adapter, I2C_FUNC_SMBUS_BYTE_DATA))
Jean Delvare8c8bacc2008-07-16 19:30:14 +0200503 return -ENODEV;
Linus Torvalds1da177e2005-04-16 15:20:36 -0700504
Jean Delvare9908ad42012-01-31 09:27:11 -0500505 /* First check for unused bits, common to both chip types */
506 if ((lm80_read_value(client, LM80_REG_ALARM2) & 0xc0)
507 || (lm80_read_value(client, LM80_REG_CONFIG) & 0x80))
Jean Delvare8c8bacc2008-07-16 19:30:14 +0200508 return -ENODEV;
Jean Delvare9908ad42012-01-31 09:27:11 -0500509
510 /*
511 * The LM96080 has manufacturer and stepping/die rev registers so we
512 * can just check that. The LM80 does not have such registers so we
513 * have to use a more expensive trick.
514 */
515 man_id = lm80_read_value(client, LM96080_REG_MAN_ID);
516 dev_id = lm80_read_value(client, LM96080_REG_DEV_ID);
517 if (man_id == 0x01 && dev_id == 0x08) {
518 /* Check more unused bits for confirmation */
519 if (lm80_read_value(client, LM96080_REG_CONV_RATE) & 0xfe)
Frans Meulenbroeks66b3b1f2012-01-04 20:58:53 +0100520 return -ENODEV;
Jean Delvare9908ad42012-01-31 09:27:11 -0500521
522 name = "lm96080";
523 } else {
524 /* Check 6-bit addressing */
525 for (i = 0x2a; i <= 0x3d; i++) {
526 cur = i2c_smbus_read_byte_data(client, i);
527 if ((i2c_smbus_read_byte_data(client, i + 0x40) != cur)
528 || (i2c_smbus_read_byte_data(client, i + 0x80) != cur)
529 || (i2c_smbus_read_byte_data(client, i + 0xc0) != cur))
530 return -ENODEV;
531 }
532
533 name = "lm80";
Linus Torvalds1da177e2005-04-16 15:20:36 -0700534 }
535
Jean Delvare9908ad42012-01-31 09:27:11 -0500536 strlcpy(info->type, name, I2C_NAME_SIZE);
Linus Torvalds1da177e2005-04-16 15:20:36 -0700537
Jean Delvare8c8bacc2008-07-16 19:30:14 +0200538 return 0;
539}
540
541static int lm80_probe(struct i2c_client *client,
542 const struct i2c_device_id *id)
543{
544 struct lm80_data *data;
545 int err;
546
Guenter Roeckc38b2822012-06-02 09:58:09 -0700547 data = devm_kzalloc(&client->dev, sizeof(struct lm80_data), GFP_KERNEL);
548 if (!data)
549 return -ENOMEM;
Jean Delvare8c8bacc2008-07-16 19:30:14 +0200550
551 i2c_set_clientdata(client, data);
Ingo Molnar9a61bf62006-01-18 23:19:26 +0100552 mutex_init(&data->update_lock);
Linus Torvalds1da177e2005-04-16 15:20:36 -0700553
Linus Torvalds1da177e2005-04-16 15:20:36 -0700554 /* Initialize the LM80 chip */
Jean Delvare6cc37ee2008-01-05 15:35:09 +0100555 lm80_init_client(client);
Linus Torvalds1da177e2005-04-16 15:20:36 -0700556
557 /* A few vars need to be filled upon startup */
Jean Delvare6cc37ee2008-01-05 15:35:09 +0100558 data->fan_min[0] = lm80_read_value(client, LM80_REG_FAN_MIN(1));
559 data->fan_min[1] = lm80_read_value(client, LM80_REG_FAN_MIN(2));
Linus Torvalds1da177e2005-04-16 15:20:36 -0700560
561 /* Register sysfs hooks */
Frans Meulenbroeks66b3b1f2012-01-04 20:58:53 +0100562 err = sysfs_create_group(&client->dev.kobj, &lm80_group);
563 if (err)
Guenter Roeckc38b2822012-06-02 09:58:09 -0700564 return err;
Mark M. Hoffman0501a382006-09-24 21:14:35 +0200565
Jean Delvare6cc37ee2008-01-05 15:35:09 +0100566 data->hwmon_dev = hwmon_device_register(&client->dev);
Tony Jones1beeffe2007-08-20 13:46:20 -0700567 if (IS_ERR(data->hwmon_dev)) {
568 err = PTR_ERR(data->hwmon_dev);
Mark M. Hoffman0501a382006-09-24 21:14:35 +0200569 goto error_remove;
Mark M. Hoffman943b0832005-07-15 21:39:18 -0400570 }
571
Linus Torvalds1da177e2005-04-16 15:20:36 -0700572 return 0;
573
Mark M. Hoffman0501a382006-09-24 21:14:35 +0200574error_remove:
Jean Delvare6cc37ee2008-01-05 15:35:09 +0100575 sysfs_remove_group(&client->dev.kobj, &lm80_group);
Linus Torvalds1da177e2005-04-16 15:20:36 -0700576 return err;
577}
578
Jean Delvare8c8bacc2008-07-16 19:30:14 +0200579static int lm80_remove(struct i2c_client *client)
Linus Torvalds1da177e2005-04-16 15:20:36 -0700580{
Mark M. Hoffman943b0832005-07-15 21:39:18 -0400581 struct lm80_data *data = i2c_get_clientdata(client);
Linus Torvalds1da177e2005-04-16 15:20:36 -0700582
Tony Jones1beeffe2007-08-20 13:46:20 -0700583 hwmon_device_unregister(data->hwmon_dev);
Mark M. Hoffman0501a382006-09-24 21:14:35 +0200584 sysfs_remove_group(&client->dev.kobj, &lm80_group);
Linus Torvalds1da177e2005-04-16 15:20:36 -0700585
Linus Torvalds1da177e2005-04-16 15:20:36 -0700586 return 0;
587}
588
589static int lm80_read_value(struct i2c_client *client, u8 reg)
590{
591 return i2c_smbus_read_byte_data(client, reg);
592}
593
594static int lm80_write_value(struct i2c_client *client, u8 reg, u8 value)
595{
596 return i2c_smbus_write_byte_data(client, reg, value);
597}
598
599/* Called when we have found a new LM80. */
600static void lm80_init_client(struct i2c_client *client)
601{
Guenter Roeck11606312012-01-19 11:02:20 -0800602 /*
603 * Reset all except Watchdog values and last conversion values
604 * This sets fan-divs to 2, among others. This makes most other
605 * initializations unnecessary
606 */
Linus Torvalds1da177e2005-04-16 15:20:36 -0700607 lm80_write_value(client, LM80_REG_CONFIG, 0x80);
608 /* Set 11-bit temperature resolution */
609 lm80_write_value(client, LM80_REG_RES, 0x08);
610
611 /* Start monitoring */
612 lm80_write_value(client, LM80_REG_CONFIG, 0x01);
613}
614
615static struct lm80_data *lm80_update_device(struct device *dev)
616{
617 struct i2c_client *client = to_i2c_client(dev);
618 struct lm80_data *data = i2c_get_clientdata(client);
619 int i;
Frans Meulenbroeks2faaa932012-01-05 14:41:53 +0100620 int rv;
621 int prev_rv;
622 struct lm80_data *ret = data;
Linus Torvalds1da177e2005-04-16 15:20:36 -0700623
Ingo Molnar9a61bf62006-01-18 23:19:26 +0100624 mutex_lock(&data->update_lock);
Linus Torvalds1da177e2005-04-16 15:20:36 -0700625
Frans Meulenbroeks96585f12012-01-10 15:49:36 +0100626 if (data->error)
627 lm80_init_client(client);
628
Linus Torvalds1da177e2005-04-16 15:20:36 -0700629 if (time_after(jiffies, data->last_updated + 2 * HZ) || !data->valid) {
630 dev_dbg(&client->dev, "Starting lm80 update\n");
631 for (i = 0; i <= 6; i++) {
Frans Meulenbroeks2faaa932012-01-05 14:41:53 +0100632 rv = lm80_read_value(client, LM80_REG_IN(i));
633 if (rv < 0)
634 goto abort;
635 data->in[i] = rv;
636
637 rv = lm80_read_value(client, LM80_REG_IN_MIN(i));
638 if (rv < 0)
639 goto abort;
640 data->in_min[i] = rv;
641
642 rv = lm80_read_value(client, LM80_REG_IN_MAX(i));
643 if (rv < 0)
644 goto abort;
645 data->in_max[i] = rv;
Linus Torvalds1da177e2005-04-16 15:20:36 -0700646 }
Linus Torvalds1da177e2005-04-16 15:20:36 -0700647
Frans Meulenbroeks2faaa932012-01-05 14:41:53 +0100648 rv = lm80_read_value(client, LM80_REG_FAN1);
649 if (rv < 0)
650 goto abort;
651 data->fan[0] = rv;
Linus Torvalds1da177e2005-04-16 15:20:36 -0700652
Frans Meulenbroeks2faaa932012-01-05 14:41:53 +0100653 rv = lm80_read_value(client, LM80_REG_FAN_MIN(1));
654 if (rv < 0)
655 goto abort;
656 data->fan_min[0] = rv;
657
658 rv = lm80_read_value(client, LM80_REG_FAN2);
659 if (rv < 0)
660 goto abort;
661 data->fan[1] = rv;
662
663 rv = lm80_read_value(client, LM80_REG_FAN_MIN(2));
664 if (rv < 0)
665 goto abort;
666 data->fan_min[1] = rv;
667
668 prev_rv = rv = lm80_read_value(client, LM80_REG_TEMP);
669 if (rv < 0)
670 goto abort;
671 rv = lm80_read_value(client, LM80_REG_RES);
672 if (rv < 0)
673 goto abort;
674 data->temp = (prev_rv << 8) | (rv & 0xf0);
675
676 rv = lm80_read_value(client, LM80_REG_TEMP_OS_MAX);
677 if (rv < 0)
678 goto abort;
679 data->temp_os_max = rv;
680
681 rv = lm80_read_value(client, LM80_REG_TEMP_OS_HYST);
682 if (rv < 0)
683 goto abort;
684 data->temp_os_hyst = rv;
685
686 rv = lm80_read_value(client, LM80_REG_TEMP_HOT_MAX);
687 if (rv < 0)
688 goto abort;
689 data->temp_hot_max = rv;
690
691 rv = lm80_read_value(client, LM80_REG_TEMP_HOT_HYST);
692 if (rv < 0)
693 goto abort;
694 data->temp_hot_hyst = rv;
695
696 rv = lm80_read_value(client, LM80_REG_FANDIV);
697 if (rv < 0)
698 goto abort;
699 data->fan_div[0] = (rv >> 2) & 0x03;
700 data->fan_div[1] = (rv >> 4) & 0x03;
701
702 prev_rv = rv = lm80_read_value(client, LM80_REG_ALARM1);
703 if (rv < 0)
704 goto abort;
705 rv = lm80_read_value(client, LM80_REG_ALARM2);
706 if (rv < 0)
707 goto abort;
708 data->alarms = prev_rv + (rv << 8);
709
Linus Torvalds1da177e2005-04-16 15:20:36 -0700710 data->last_updated = jiffies;
711 data->valid = 1;
Frans Meulenbroeks96585f12012-01-10 15:49:36 +0100712 data->error = 0;
Linus Torvalds1da177e2005-04-16 15:20:36 -0700713 }
Frans Meulenbroeks2faaa932012-01-05 14:41:53 +0100714 goto done;
Linus Torvalds1da177e2005-04-16 15:20:36 -0700715
Frans Meulenbroeks2faaa932012-01-05 14:41:53 +0100716abort:
717 ret = ERR_PTR(rv);
718 data->valid = 0;
Frans Meulenbroeks96585f12012-01-10 15:49:36 +0100719 data->error = 1;
Frans Meulenbroeks2faaa932012-01-05 14:41:53 +0100720
721done:
Ingo Molnar9a61bf62006-01-18 23:19:26 +0100722 mutex_unlock(&data->update_lock);
Linus Torvalds1da177e2005-04-16 15:20:36 -0700723
Frans Meulenbroeks2faaa932012-01-05 14:41:53 +0100724 return ret;
Linus Torvalds1da177e2005-04-16 15:20:36 -0700725}
726
Axel Linf0967ee2012-01-20 15:38:18 +0800727module_i2c_driver(lm80_driver);
Linus Torvalds1da177e2005-04-16 15:20:36 -0700728
729MODULE_AUTHOR("Frodo Looijaard <frodol@dds.nl> and "
730 "Philip Edelbrock <phil@netroedge.com>");
731MODULE_DESCRIPTION("LM80 driver");
732MODULE_LICENSE("GPL");