blob: b5e3b28516987d51a45f63bb45c3d59dceee090d [file] [log] [blame]
Linus Torvalds1da177e2005-04-16 15:20:36 -07001/*
2 lm78.c - Part of lm_sensors, Linux kernel modules for hardware
3 monitoring
4 Copyright (c) 1998, 1999 Frodo Looijaard <frodol@dds.nl>
Jean Delvarec40769f2007-05-08 17:22:00 +02005 Copyright (c) 2007 Jean Delvare <khali@linux-fr.org>
Linus Torvalds1da177e2005-04-16 15:20:36 -07006
7 This program is free software; you can redistribute it and/or modify
8 it under the terms of the GNU General Public License as published by
9 the Free Software Foundation; either version 2 of the License, or
10 (at your option) any later version.
11
12 This program is distributed in the hope that it will be useful,
13 but WITHOUT ANY WARRANTY; without even the implied warranty of
14 MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
15 GNU General Public License for more details.
16
17 You should have received a copy of the GNU General Public License
18 along with this program; if not, write to the Free Software
19 Foundation, Inc., 675 Mass Ave, Cambridge, MA 02139, USA.
20*/
21
Linus Torvalds1da177e2005-04-16 15:20:36 -070022#include <linux/module.h>
23#include <linux/init.h>
24#include <linux/slab.h>
25#include <linux/jiffies.h>
26#include <linux/i2c.h>
Jean Delvarec40769f2007-05-08 17:22:00 +020027#include <linux/platform_device.h>
28#include <linux/ioport.h>
Mark M. Hoffman943b0832005-07-15 21:39:18 -040029#include <linux/hwmon.h>
Jean Delvare19f673e2005-07-31 22:12:09 +020030#include <linux/hwmon-vid.h>
Jean Delvare247dde42007-05-08 17:22:01 +020031#include <linux/hwmon-sysfs.h>
Mark M. Hoffman943b0832005-07-15 21:39:18 -040032#include <linux/err.h>
Ingo Molnar9a61bf62006-01-18 23:19:26 +010033#include <linux/mutex.h>
Linus Torvalds1da177e2005-04-16 15:20:36 -070034#include <asm/io.h>
35
Jean Delvarec40769f2007-05-08 17:22:00 +020036/* ISA device, if found */
37static struct platform_device *pdev;
38
Linus Torvalds1da177e2005-04-16 15:20:36 -070039/* Addresses to scan */
Mark M. Hoffman25e9c862008-02-17 22:28:03 -050040static const unsigned short normal_i2c[] = { 0x28, 0x29, 0x2a, 0x2b, 0x2c, 0x2d,
41 0x2e, 0x2f, I2C_CLIENT_END };
Jean Delvare2d8672c2005-07-19 23:56:35 +020042static unsigned short isa_address = 0x290;
Linus Torvalds1da177e2005-04-16 15:20:36 -070043
44/* Insmod parameters */
Jean Delvaref4b50262005-07-31 21:49:03 +020045I2C_CLIENT_INSMOD_2(lm78, lm79);
Linus Torvalds1da177e2005-04-16 15:20:36 -070046
47/* Many LM78 constants specified below */
48
49/* Length of ISA address segment */
50#define LM78_EXTENT 8
51
52/* Where are the ISA address/data registers relative to the base address */
53#define LM78_ADDR_REG_OFFSET 5
54#define LM78_DATA_REG_OFFSET 6
55
56/* The LM78 registers */
57#define LM78_REG_IN_MAX(nr) (0x2b + (nr) * 2)
58#define LM78_REG_IN_MIN(nr) (0x2c + (nr) * 2)
59#define LM78_REG_IN(nr) (0x20 + (nr))
60
61#define LM78_REG_FAN_MIN(nr) (0x3b + (nr))
62#define LM78_REG_FAN(nr) (0x28 + (nr))
63
64#define LM78_REG_TEMP 0x27
65#define LM78_REG_TEMP_OVER 0x39
66#define LM78_REG_TEMP_HYST 0x3a
67
68#define LM78_REG_ALARM1 0x41
69#define LM78_REG_ALARM2 0x42
70
71#define LM78_REG_VID_FANDIV 0x47
72
73#define LM78_REG_CONFIG 0x40
74#define LM78_REG_CHIPID 0x49
75#define LM78_REG_I2C_ADDR 0x48
76
77
78/* Conversions. Rounding and limit checking is only done on the TO_REG
79 variants. */
80
81/* IN: mV, (0V to 4.08V)
82 REG: 16mV/bit */
83static inline u8 IN_TO_REG(unsigned long val)
84{
85 unsigned long nval = SENSORS_LIMIT(val, 0, 4080);
86 return (nval + 8) / 16;
87}
88#define IN_FROM_REG(val) ((val) * 16)
89
90static inline u8 FAN_TO_REG(long rpm, int div)
91{
92 if (rpm <= 0)
93 return 255;
94 return SENSORS_LIMIT((1350000 + rpm * div / 2) / (rpm * div), 1, 254);
95}
96
97static inline int FAN_FROM_REG(u8 val, int div)
98{
99 return val==0 ? -1 : val==255 ? 0 : 1350000/(val*div);
100}
101
102/* TEMP: mC (-128C to +127C)
103 REG: 1C/bit, two's complement */
104static inline s8 TEMP_TO_REG(int val)
105{
106 int nval = SENSORS_LIMIT(val, -128000, 127000) ;
107 return nval<0 ? (nval-500)/1000 : (nval+500)/1000;
108}
109
110static inline int TEMP_FROM_REG(s8 val)
111{
112 return val * 1000;
113}
114
Linus Torvalds1da177e2005-04-16 15:20:36 -0700115#define DIV_FROM_REG(val) (1 << (val))
116
Linus Torvalds1da177e2005-04-16 15:20:36 -0700117struct lm78_data {
Jean Delvare0c6e9732008-10-17 17:51:16 +0200118 struct i2c_client *client;
Tony Jones1beeffe2007-08-20 13:46:20 -0700119 struct device *hwmon_dev;
Ingo Molnar9a61bf62006-01-18 23:19:26 +0100120 struct mutex lock;
Linus Torvalds1da177e2005-04-16 15:20:36 -0700121 enum chips type;
122
Jean Delvare6e1b5022008-10-17 17:51:15 +0200123 /* For ISA device only */
124 const char *name;
125 int isa_addr;
126
Ingo Molnar9a61bf62006-01-18 23:19:26 +0100127 struct mutex update_lock;
Linus Torvalds1da177e2005-04-16 15:20:36 -0700128 char valid; /* !=0 if following fields are valid */
129 unsigned long last_updated; /* In jiffies */
130
131 u8 in[7]; /* Register value */
132 u8 in_max[7]; /* Register value */
133 u8 in_min[7]; /* Register value */
134 u8 fan[3]; /* Register value */
135 u8 fan_min[3]; /* Register value */
136 s8 temp; /* Register value */
137 s8 temp_over; /* Register value */
138 s8 temp_hyst; /* Register value */
139 u8 fan_div[3]; /* Register encoding, shifted right */
140 u8 vid; /* Register encoding, combined */
141 u16 alarms; /* Register encoding, combined */
142};
143
144
Jean Delvare0c6e9732008-10-17 17:51:16 +0200145static int lm78_i2c_detect(struct i2c_client *client, int kind,
146 struct i2c_board_info *info);
147static int lm78_i2c_probe(struct i2c_client *client,
148 const struct i2c_device_id *id);
149static int lm78_i2c_remove(struct i2c_client *client);
Linus Torvalds1da177e2005-04-16 15:20:36 -0700150
Jean Delvarec40769f2007-05-08 17:22:00 +0200151static int __devinit lm78_isa_probe(struct platform_device *pdev);
152static int __devexit lm78_isa_remove(struct platform_device *pdev);
153
Jean Delvarec59cc302007-05-08 17:22:01 +0200154static int lm78_read_value(struct lm78_data *data, u8 reg);
155static int lm78_write_value(struct lm78_data *data, u8 reg, u8 value);
Linus Torvalds1da177e2005-04-16 15:20:36 -0700156static struct lm78_data *lm78_update_device(struct device *dev);
Jean Delvarec59cc302007-05-08 17:22:01 +0200157static void lm78_init_device(struct lm78_data *data);
Linus Torvalds1da177e2005-04-16 15:20:36 -0700158
159
Jean Delvare0c6e9732008-10-17 17:51:16 +0200160static const struct i2c_device_id lm78_i2c_id[] = {
161 { "lm78", lm78 },
162 { "lm79", lm79 },
163 { }
164};
165MODULE_DEVICE_TABLE(i2c, lm78_i2c_id);
166
Linus Torvalds1da177e2005-04-16 15:20:36 -0700167static struct i2c_driver lm78_driver = {
Jean Delvare0c6e9732008-10-17 17:51:16 +0200168 .class = I2C_CLASS_HWMON,
Laurent Riffardcdaf7932005-11-26 20:37:41 +0100169 .driver = {
Laurent Riffardcdaf7932005-11-26 20:37:41 +0100170 .name = "lm78",
171 },
Jean Delvare0c6e9732008-10-17 17:51:16 +0200172 .probe = lm78_i2c_probe,
173 .remove = lm78_i2c_remove,
174 .id_table = lm78_i2c_id,
175 .detect = lm78_i2c_detect,
176 .address_data = &addr_data,
Linus Torvalds1da177e2005-04-16 15:20:36 -0700177};
178
Jean Delvarec40769f2007-05-08 17:22:00 +0200179static struct platform_driver lm78_isa_driver = {
Laurent Riffardcdaf7932005-11-26 20:37:41 +0100180 .driver = {
Jean Delvare87218842006-09-03 22:36:14 +0200181 .owner = THIS_MODULE,
Jean Delvarec40769f2007-05-08 17:22:00 +0200182 .name = "lm78",
Laurent Riffardcdaf7932005-11-26 20:37:41 +0100183 },
Jean Delvarec40769f2007-05-08 17:22:00 +0200184 .probe = lm78_isa_probe,
185 .remove = lm78_isa_remove,
Jean Delvarefde09502005-07-19 23:51:07 +0200186};
187
188
Linus Torvalds1da177e2005-04-16 15:20:36 -0700189/* 7 Voltages */
Jean Delvare247dde42007-05-08 17:22:01 +0200190static ssize_t show_in(struct device *dev, struct device_attribute *da,
191 char *buf)
Linus Torvalds1da177e2005-04-16 15:20:36 -0700192{
Jean Delvare247dde42007-05-08 17:22:01 +0200193 struct sensor_device_attribute *attr = to_sensor_dev_attr(da);
Linus Torvalds1da177e2005-04-16 15:20:36 -0700194 struct lm78_data *data = lm78_update_device(dev);
Jean Delvare247dde42007-05-08 17:22:01 +0200195 return sprintf(buf, "%d\n", IN_FROM_REG(data->in[attr->index]));
Linus Torvalds1da177e2005-04-16 15:20:36 -0700196}
197
Jean Delvare247dde42007-05-08 17:22:01 +0200198static ssize_t show_in_min(struct device *dev, struct device_attribute *da,
199 char *buf)
Linus Torvalds1da177e2005-04-16 15:20:36 -0700200{
Jean Delvare247dde42007-05-08 17:22:01 +0200201 struct sensor_device_attribute *attr = to_sensor_dev_attr(da);
Linus Torvalds1da177e2005-04-16 15:20:36 -0700202 struct lm78_data *data = lm78_update_device(dev);
Jean Delvare247dde42007-05-08 17:22:01 +0200203 return sprintf(buf, "%d\n", IN_FROM_REG(data->in_min[attr->index]));
Linus Torvalds1da177e2005-04-16 15:20:36 -0700204}
205
Jean Delvare247dde42007-05-08 17:22:01 +0200206static ssize_t show_in_max(struct device *dev, struct device_attribute *da,
207 char *buf)
Linus Torvalds1da177e2005-04-16 15:20:36 -0700208{
Jean Delvare247dde42007-05-08 17:22:01 +0200209 struct sensor_device_attribute *attr = to_sensor_dev_attr(da);
Linus Torvalds1da177e2005-04-16 15:20:36 -0700210 struct lm78_data *data = lm78_update_device(dev);
Jean Delvare247dde42007-05-08 17:22:01 +0200211 return sprintf(buf, "%d\n", IN_FROM_REG(data->in_max[attr->index]));
Linus Torvalds1da177e2005-04-16 15:20:36 -0700212}
213
Jean Delvare247dde42007-05-08 17:22:01 +0200214static ssize_t set_in_min(struct device *dev, struct device_attribute *da,
215 const char *buf, size_t count)
Linus Torvalds1da177e2005-04-16 15:20:36 -0700216{
Jean Delvare247dde42007-05-08 17:22:01 +0200217 struct sensor_device_attribute *attr = to_sensor_dev_attr(da);
Jean Delvarec40769f2007-05-08 17:22:00 +0200218 struct lm78_data *data = dev_get_drvdata(dev);
Linus Torvalds1da177e2005-04-16 15:20:36 -0700219 unsigned long val = simple_strtoul(buf, NULL, 10);
Jean Delvare247dde42007-05-08 17:22:01 +0200220 int nr = attr->index;
Linus Torvalds1da177e2005-04-16 15:20:36 -0700221
Ingo Molnar9a61bf62006-01-18 23:19:26 +0100222 mutex_lock(&data->update_lock);
Linus Torvalds1da177e2005-04-16 15:20:36 -0700223 data->in_min[nr] = IN_TO_REG(val);
Jean Delvarec59cc302007-05-08 17:22:01 +0200224 lm78_write_value(data, LM78_REG_IN_MIN(nr), data->in_min[nr]);
Ingo Molnar9a61bf62006-01-18 23:19:26 +0100225 mutex_unlock(&data->update_lock);
Linus Torvalds1da177e2005-04-16 15:20:36 -0700226 return count;
227}
228
Jean Delvare247dde42007-05-08 17:22:01 +0200229static ssize_t set_in_max(struct device *dev, struct device_attribute *da,
230 const char *buf, size_t count)
Linus Torvalds1da177e2005-04-16 15:20:36 -0700231{
Jean Delvare247dde42007-05-08 17:22:01 +0200232 struct sensor_device_attribute *attr = to_sensor_dev_attr(da);
Jean Delvarec40769f2007-05-08 17:22:00 +0200233 struct lm78_data *data = dev_get_drvdata(dev);
Linus Torvalds1da177e2005-04-16 15:20:36 -0700234 unsigned long val = simple_strtoul(buf, NULL, 10);
Jean Delvare247dde42007-05-08 17:22:01 +0200235 int nr = attr->index;
Linus Torvalds1da177e2005-04-16 15:20:36 -0700236
Ingo Molnar9a61bf62006-01-18 23:19:26 +0100237 mutex_lock(&data->update_lock);
Linus Torvalds1da177e2005-04-16 15:20:36 -0700238 data->in_max[nr] = IN_TO_REG(val);
Jean Delvarec59cc302007-05-08 17:22:01 +0200239 lm78_write_value(data, LM78_REG_IN_MAX(nr), data->in_max[nr]);
Ingo Molnar9a61bf62006-01-18 23:19:26 +0100240 mutex_unlock(&data->update_lock);
Linus Torvalds1da177e2005-04-16 15:20:36 -0700241 return count;
242}
243
244#define show_in_offset(offset) \
Jean Delvare247dde42007-05-08 17:22:01 +0200245static SENSOR_DEVICE_ATTR(in##offset##_input, S_IRUGO, \
246 show_in, NULL, offset); \
247static SENSOR_DEVICE_ATTR(in##offset##_min, S_IRUGO | S_IWUSR, \
248 show_in_min, set_in_min, offset); \
249static SENSOR_DEVICE_ATTR(in##offset##_max, S_IRUGO | S_IWUSR, \
250 show_in_max, set_in_max, offset);
Linus Torvalds1da177e2005-04-16 15:20:36 -0700251
252show_in_offset(0);
253show_in_offset(1);
254show_in_offset(2);
255show_in_offset(3);
256show_in_offset(4);
257show_in_offset(5);
258show_in_offset(6);
259
260/* Temperature */
Jean Delvare247dde42007-05-08 17:22:01 +0200261static ssize_t show_temp(struct device *dev, struct device_attribute *da,
262 char *buf)
Linus Torvalds1da177e2005-04-16 15:20:36 -0700263{
264 struct lm78_data *data = lm78_update_device(dev);
265 return sprintf(buf, "%d\n", TEMP_FROM_REG(data->temp));
266}
267
Jean Delvare247dde42007-05-08 17:22:01 +0200268static ssize_t show_temp_over(struct device *dev, struct device_attribute *da,
269 char *buf)
Linus Torvalds1da177e2005-04-16 15:20:36 -0700270{
271 struct lm78_data *data = lm78_update_device(dev);
272 return sprintf(buf, "%d\n", TEMP_FROM_REG(data->temp_over));
273}
274
Jean Delvare247dde42007-05-08 17:22:01 +0200275static ssize_t set_temp_over(struct device *dev, struct device_attribute *da,
276 const char *buf, size_t count)
Linus Torvalds1da177e2005-04-16 15:20:36 -0700277{
Jean Delvarec40769f2007-05-08 17:22:00 +0200278 struct lm78_data *data = dev_get_drvdata(dev);
Linus Torvalds1da177e2005-04-16 15:20:36 -0700279 long val = simple_strtol(buf, NULL, 10);
280
Ingo Molnar9a61bf62006-01-18 23:19:26 +0100281 mutex_lock(&data->update_lock);
Linus Torvalds1da177e2005-04-16 15:20:36 -0700282 data->temp_over = TEMP_TO_REG(val);
Jean Delvarec59cc302007-05-08 17:22:01 +0200283 lm78_write_value(data, LM78_REG_TEMP_OVER, data->temp_over);
Ingo Molnar9a61bf62006-01-18 23:19:26 +0100284 mutex_unlock(&data->update_lock);
Linus Torvalds1da177e2005-04-16 15:20:36 -0700285 return count;
286}
287
Jean Delvare247dde42007-05-08 17:22:01 +0200288static ssize_t show_temp_hyst(struct device *dev, struct device_attribute *da,
289 char *buf)
Linus Torvalds1da177e2005-04-16 15:20:36 -0700290{
291 struct lm78_data *data = lm78_update_device(dev);
292 return sprintf(buf, "%d\n", TEMP_FROM_REG(data->temp_hyst));
293}
294
Jean Delvare247dde42007-05-08 17:22:01 +0200295static ssize_t set_temp_hyst(struct device *dev, struct device_attribute *da,
296 const char *buf, size_t count)
Linus Torvalds1da177e2005-04-16 15:20:36 -0700297{
Jean Delvarec40769f2007-05-08 17:22:00 +0200298 struct lm78_data *data = dev_get_drvdata(dev);
Linus Torvalds1da177e2005-04-16 15:20:36 -0700299 long val = simple_strtol(buf, NULL, 10);
300
Ingo Molnar9a61bf62006-01-18 23:19:26 +0100301 mutex_lock(&data->update_lock);
Linus Torvalds1da177e2005-04-16 15:20:36 -0700302 data->temp_hyst = TEMP_TO_REG(val);
Jean Delvarec59cc302007-05-08 17:22:01 +0200303 lm78_write_value(data, LM78_REG_TEMP_HYST, data->temp_hyst);
Ingo Molnar9a61bf62006-01-18 23:19:26 +0100304 mutex_unlock(&data->update_lock);
Linus Torvalds1da177e2005-04-16 15:20:36 -0700305 return count;
306}
307
308static DEVICE_ATTR(temp1_input, S_IRUGO, show_temp, NULL);
309static DEVICE_ATTR(temp1_max, S_IRUGO | S_IWUSR,
310 show_temp_over, set_temp_over);
311static DEVICE_ATTR(temp1_max_hyst, S_IRUGO | S_IWUSR,
312 show_temp_hyst, set_temp_hyst);
313
314/* 3 Fans */
Jean Delvare247dde42007-05-08 17:22:01 +0200315static ssize_t show_fan(struct device *dev, struct device_attribute *da,
316 char *buf)
Linus Torvalds1da177e2005-04-16 15:20:36 -0700317{
Jean Delvare247dde42007-05-08 17:22:01 +0200318 struct sensor_device_attribute *attr = to_sensor_dev_attr(da);
Linus Torvalds1da177e2005-04-16 15:20:36 -0700319 struct lm78_data *data = lm78_update_device(dev);
Jean Delvare247dde42007-05-08 17:22:01 +0200320 int nr = attr->index;
Linus Torvalds1da177e2005-04-16 15:20:36 -0700321 return sprintf(buf, "%d\n", FAN_FROM_REG(data->fan[nr],
322 DIV_FROM_REG(data->fan_div[nr])) );
323}
324
Jean Delvare247dde42007-05-08 17:22:01 +0200325static ssize_t show_fan_min(struct device *dev, struct device_attribute *da,
326 char *buf)
Linus Torvalds1da177e2005-04-16 15:20:36 -0700327{
Jean Delvare247dde42007-05-08 17:22:01 +0200328 struct sensor_device_attribute *attr = to_sensor_dev_attr(da);
Linus Torvalds1da177e2005-04-16 15:20:36 -0700329 struct lm78_data *data = lm78_update_device(dev);
Jean Delvare247dde42007-05-08 17:22:01 +0200330 int nr = attr->index;
Linus Torvalds1da177e2005-04-16 15:20:36 -0700331 return sprintf(buf,"%d\n", FAN_FROM_REG(data->fan_min[nr],
332 DIV_FROM_REG(data->fan_div[nr])) );
333}
334
Jean Delvare247dde42007-05-08 17:22:01 +0200335static ssize_t set_fan_min(struct device *dev, struct device_attribute *da,
336 const char *buf, size_t count)
Linus Torvalds1da177e2005-04-16 15:20:36 -0700337{
Jean Delvare247dde42007-05-08 17:22:01 +0200338 struct sensor_device_attribute *attr = to_sensor_dev_attr(da);
Jean Delvarec40769f2007-05-08 17:22:00 +0200339 struct lm78_data *data = dev_get_drvdata(dev);
Jean Delvare247dde42007-05-08 17:22:01 +0200340 int nr = attr->index;
Linus Torvalds1da177e2005-04-16 15:20:36 -0700341 unsigned long val = simple_strtoul(buf, NULL, 10);
342
Ingo Molnar9a61bf62006-01-18 23:19:26 +0100343 mutex_lock(&data->update_lock);
Linus Torvalds1da177e2005-04-16 15:20:36 -0700344 data->fan_min[nr] = FAN_TO_REG(val, DIV_FROM_REG(data->fan_div[nr]));
Jean Delvarec59cc302007-05-08 17:22:01 +0200345 lm78_write_value(data, LM78_REG_FAN_MIN(nr), data->fan_min[nr]);
Ingo Molnar9a61bf62006-01-18 23:19:26 +0100346 mutex_unlock(&data->update_lock);
Linus Torvalds1da177e2005-04-16 15:20:36 -0700347 return count;
348}
349
Jean Delvare247dde42007-05-08 17:22:01 +0200350static ssize_t show_fan_div(struct device *dev, struct device_attribute *da,
351 char *buf)
Linus Torvalds1da177e2005-04-16 15:20:36 -0700352{
Jean Delvare247dde42007-05-08 17:22:01 +0200353 struct sensor_device_attribute *attr = to_sensor_dev_attr(da);
Linus Torvalds1da177e2005-04-16 15:20:36 -0700354 struct lm78_data *data = lm78_update_device(dev);
Jean Delvare247dde42007-05-08 17:22:01 +0200355 return sprintf(buf, "%d\n", DIV_FROM_REG(data->fan_div[attr->index]));
Linus Torvalds1da177e2005-04-16 15:20:36 -0700356}
357
358/* Note: we save and restore the fan minimum here, because its value is
359 determined in part by the fan divisor. This follows the principle of
Andreas Mohrd6e05ed2006-06-26 18:35:02 +0200360 least surprise; the user doesn't expect the fan minimum to change just
Linus Torvalds1da177e2005-04-16 15:20:36 -0700361 because the divisor changed. */
Jean Delvare247dde42007-05-08 17:22:01 +0200362static ssize_t set_fan_div(struct device *dev, struct device_attribute *da,
363 const char *buf, size_t count)
Linus Torvalds1da177e2005-04-16 15:20:36 -0700364{
Jean Delvare247dde42007-05-08 17:22:01 +0200365 struct sensor_device_attribute *attr = to_sensor_dev_attr(da);
Jean Delvarec40769f2007-05-08 17:22:00 +0200366 struct lm78_data *data = dev_get_drvdata(dev);
Jean Delvare247dde42007-05-08 17:22:01 +0200367 int nr = attr->index;
Linus Torvalds1da177e2005-04-16 15:20:36 -0700368 unsigned long val = simple_strtoul(buf, NULL, 10);
369 unsigned long min;
370 u8 reg;
371
Ingo Molnar9a61bf62006-01-18 23:19:26 +0100372 mutex_lock(&data->update_lock);
Linus Torvalds1da177e2005-04-16 15:20:36 -0700373 min = FAN_FROM_REG(data->fan_min[nr],
374 DIV_FROM_REG(data->fan_div[nr]));
375
376 switch (val) {
377 case 1: data->fan_div[nr] = 0; break;
378 case 2: data->fan_div[nr] = 1; break;
379 case 4: data->fan_div[nr] = 2; break;
380 case 8: data->fan_div[nr] = 3; break;
381 default:
Jean Delvarec40769f2007-05-08 17:22:00 +0200382 dev_err(dev, "fan_div value %ld not "
Linus Torvalds1da177e2005-04-16 15:20:36 -0700383 "supported. Choose one of 1, 2, 4 or 8!\n", val);
Ingo Molnar9a61bf62006-01-18 23:19:26 +0100384 mutex_unlock(&data->update_lock);
Linus Torvalds1da177e2005-04-16 15:20:36 -0700385 return -EINVAL;
386 }
387
Jean Delvarec59cc302007-05-08 17:22:01 +0200388 reg = lm78_read_value(data, LM78_REG_VID_FANDIV);
Linus Torvalds1da177e2005-04-16 15:20:36 -0700389 switch (nr) {
390 case 0:
391 reg = (reg & 0xcf) | (data->fan_div[nr] << 4);
392 break;
393 case 1:
394 reg = (reg & 0x3f) | (data->fan_div[nr] << 6);
395 break;
396 }
Jean Delvarec59cc302007-05-08 17:22:01 +0200397 lm78_write_value(data, LM78_REG_VID_FANDIV, reg);
Linus Torvalds1da177e2005-04-16 15:20:36 -0700398
399 data->fan_min[nr] =
400 FAN_TO_REG(min, DIV_FROM_REG(data->fan_div[nr]));
Jean Delvarec59cc302007-05-08 17:22:01 +0200401 lm78_write_value(data, LM78_REG_FAN_MIN(nr), data->fan_min[nr]);
Ingo Molnar9a61bf62006-01-18 23:19:26 +0100402 mutex_unlock(&data->update_lock);
Linus Torvalds1da177e2005-04-16 15:20:36 -0700403
404 return count;
405}
406
Jean Delvare247dde42007-05-08 17:22:01 +0200407#define show_fan_offset(offset) \
408static SENSOR_DEVICE_ATTR(fan##offset##_input, S_IRUGO, \
409 show_fan, NULL, offset - 1); \
410static SENSOR_DEVICE_ATTR(fan##offset##_min, S_IRUGO | S_IWUSR, \
411 show_fan_min, set_fan_min, offset - 1);
Linus Torvalds1da177e2005-04-16 15:20:36 -0700412
413show_fan_offset(1);
414show_fan_offset(2);
415show_fan_offset(3);
416
417/* Fan 3 divisor is locked in H/W */
Jean Delvare247dde42007-05-08 17:22:01 +0200418static SENSOR_DEVICE_ATTR(fan1_div, S_IRUGO | S_IWUSR,
419 show_fan_div, set_fan_div, 0);
420static SENSOR_DEVICE_ATTR(fan2_div, S_IRUGO | S_IWUSR,
421 show_fan_div, set_fan_div, 1);
422static SENSOR_DEVICE_ATTR(fan3_div, S_IRUGO, show_fan_div, NULL, 2);
Linus Torvalds1da177e2005-04-16 15:20:36 -0700423
424/* VID */
Jean Delvare247dde42007-05-08 17:22:01 +0200425static ssize_t show_vid(struct device *dev, struct device_attribute *da,
426 char *buf)
Linus Torvalds1da177e2005-04-16 15:20:36 -0700427{
428 struct lm78_data *data = lm78_update_device(dev);
Jean Delvared0d3cd62005-11-23 15:44:26 -0800429 return sprintf(buf, "%d\n", vid_from_reg(data->vid, 82));
Linus Torvalds1da177e2005-04-16 15:20:36 -0700430}
431static DEVICE_ATTR(cpu0_vid, S_IRUGO, show_vid, NULL);
432
433/* Alarms */
Jean Delvare247dde42007-05-08 17:22:01 +0200434static ssize_t show_alarms(struct device *dev, struct device_attribute *da,
435 char *buf)
Linus Torvalds1da177e2005-04-16 15:20:36 -0700436{
437 struct lm78_data *data = lm78_update_device(dev);
438 return sprintf(buf, "%u\n", data->alarms);
439}
440static DEVICE_ATTR(alarms, S_IRUGO, show_alarms, NULL);
441
Jean Delvare428a7032007-09-04 23:25:33 +0200442static ssize_t show_alarm(struct device *dev, struct device_attribute *da,
443 char *buf)
444{
445 struct lm78_data *data = lm78_update_device(dev);
446 int nr = to_sensor_dev_attr(da)->index;
447 return sprintf(buf, "%u\n", (data->alarms >> nr) & 1);
448}
449static SENSOR_DEVICE_ATTR(in0_alarm, S_IRUGO, show_alarm, NULL, 0);
450static SENSOR_DEVICE_ATTR(in1_alarm, S_IRUGO, show_alarm, NULL, 1);
451static SENSOR_DEVICE_ATTR(in2_alarm, S_IRUGO, show_alarm, NULL, 2);
452static SENSOR_DEVICE_ATTR(in3_alarm, S_IRUGO, show_alarm, NULL, 3);
453static SENSOR_DEVICE_ATTR(in4_alarm, S_IRUGO, show_alarm, NULL, 8);
454static SENSOR_DEVICE_ATTR(in5_alarm, S_IRUGO, show_alarm, NULL, 9);
455static SENSOR_DEVICE_ATTR(in6_alarm, S_IRUGO, show_alarm, NULL, 10);
456static SENSOR_DEVICE_ATTR(fan1_alarm, S_IRUGO, show_alarm, NULL, 6);
457static SENSOR_DEVICE_ATTR(fan2_alarm, S_IRUGO, show_alarm, NULL, 7);
458static SENSOR_DEVICE_ATTR(fan3_alarm, S_IRUGO, show_alarm, NULL, 11);
459static SENSOR_DEVICE_ATTR(temp1_alarm, S_IRUGO, show_alarm, NULL, 4);
460
Mark M. Hoffmanc1685f62006-09-24 20:59:49 +0200461static struct attribute *lm78_attributes[] = {
Jean Delvare247dde42007-05-08 17:22:01 +0200462 &sensor_dev_attr_in0_input.dev_attr.attr,
463 &sensor_dev_attr_in0_min.dev_attr.attr,
464 &sensor_dev_attr_in0_max.dev_attr.attr,
Jean Delvare428a7032007-09-04 23:25:33 +0200465 &sensor_dev_attr_in0_alarm.dev_attr.attr,
Jean Delvare247dde42007-05-08 17:22:01 +0200466 &sensor_dev_attr_in1_input.dev_attr.attr,
467 &sensor_dev_attr_in1_min.dev_attr.attr,
468 &sensor_dev_attr_in1_max.dev_attr.attr,
Jean Delvare428a7032007-09-04 23:25:33 +0200469 &sensor_dev_attr_in1_alarm.dev_attr.attr,
Jean Delvare247dde42007-05-08 17:22:01 +0200470 &sensor_dev_attr_in2_input.dev_attr.attr,
471 &sensor_dev_attr_in2_min.dev_attr.attr,
472 &sensor_dev_attr_in2_max.dev_attr.attr,
Jean Delvare428a7032007-09-04 23:25:33 +0200473 &sensor_dev_attr_in2_alarm.dev_attr.attr,
Jean Delvare247dde42007-05-08 17:22:01 +0200474 &sensor_dev_attr_in3_input.dev_attr.attr,
475 &sensor_dev_attr_in3_min.dev_attr.attr,
476 &sensor_dev_attr_in3_max.dev_attr.attr,
Jean Delvare428a7032007-09-04 23:25:33 +0200477 &sensor_dev_attr_in3_alarm.dev_attr.attr,
Jean Delvare247dde42007-05-08 17:22:01 +0200478 &sensor_dev_attr_in4_input.dev_attr.attr,
479 &sensor_dev_attr_in4_min.dev_attr.attr,
480 &sensor_dev_attr_in4_max.dev_attr.attr,
Jean Delvare428a7032007-09-04 23:25:33 +0200481 &sensor_dev_attr_in4_alarm.dev_attr.attr,
Jean Delvare247dde42007-05-08 17:22:01 +0200482 &sensor_dev_attr_in5_input.dev_attr.attr,
483 &sensor_dev_attr_in5_min.dev_attr.attr,
484 &sensor_dev_attr_in5_max.dev_attr.attr,
Jean Delvare428a7032007-09-04 23:25:33 +0200485 &sensor_dev_attr_in5_alarm.dev_attr.attr,
Jean Delvare247dde42007-05-08 17:22:01 +0200486 &sensor_dev_attr_in6_input.dev_attr.attr,
487 &sensor_dev_attr_in6_min.dev_attr.attr,
488 &sensor_dev_attr_in6_max.dev_attr.attr,
Jean Delvare428a7032007-09-04 23:25:33 +0200489 &sensor_dev_attr_in6_alarm.dev_attr.attr,
Mark M. Hoffmanc1685f62006-09-24 20:59:49 +0200490 &dev_attr_temp1_input.attr,
491 &dev_attr_temp1_max.attr,
492 &dev_attr_temp1_max_hyst.attr,
Jean Delvare428a7032007-09-04 23:25:33 +0200493 &sensor_dev_attr_temp1_alarm.dev_attr.attr,
Jean Delvare247dde42007-05-08 17:22:01 +0200494 &sensor_dev_attr_fan1_input.dev_attr.attr,
495 &sensor_dev_attr_fan1_min.dev_attr.attr,
496 &sensor_dev_attr_fan1_div.dev_attr.attr,
Jean Delvare428a7032007-09-04 23:25:33 +0200497 &sensor_dev_attr_fan1_alarm.dev_attr.attr,
Jean Delvare247dde42007-05-08 17:22:01 +0200498 &sensor_dev_attr_fan2_input.dev_attr.attr,
499 &sensor_dev_attr_fan2_min.dev_attr.attr,
500 &sensor_dev_attr_fan2_div.dev_attr.attr,
Jean Delvare428a7032007-09-04 23:25:33 +0200501 &sensor_dev_attr_fan2_alarm.dev_attr.attr,
Jean Delvare247dde42007-05-08 17:22:01 +0200502 &sensor_dev_attr_fan3_input.dev_attr.attr,
503 &sensor_dev_attr_fan3_min.dev_attr.attr,
504 &sensor_dev_attr_fan3_div.dev_attr.attr,
Jean Delvare428a7032007-09-04 23:25:33 +0200505 &sensor_dev_attr_fan3_alarm.dev_attr.attr,
Mark M. Hoffmanc1685f62006-09-24 20:59:49 +0200506 &dev_attr_alarms.attr,
507 &dev_attr_cpu0_vid.attr,
508
509 NULL
510};
511
512static const struct attribute_group lm78_group = {
513 .attrs = lm78_attributes,
514};
515
Jean Delvarec40769f2007-05-08 17:22:00 +0200516/* I2C devices get this name attribute automatically, but for ISA devices
517 we must create it by ourselves. */
518static ssize_t show_name(struct device *dev, struct device_attribute
519 *devattr, char *buf)
520{
521 struct lm78_data *data = dev_get_drvdata(dev);
522
Jean Delvare6e1b5022008-10-17 17:51:15 +0200523 return sprintf(buf, "%s\n", data->name);
Jean Delvarec40769f2007-05-08 17:22:00 +0200524}
525static DEVICE_ATTR(name, S_IRUGO, show_name, NULL);
526
Jean Delvare18c73f92008-10-17 17:51:15 +0200527/* Returns 1 if the I2C chip appears to be an alias of the ISA chip */
528static int lm78_alias_detect(struct i2c_client *client, u8 chipid)
529{
Jean Delvare0c6e9732008-10-17 17:51:16 +0200530 struct lm78_data *isa;
Jean Delvare18c73f92008-10-17 17:51:15 +0200531 int i;
532
533 if (!pdev) /* No ISA chip */
534 return 0;
Jean Delvare18c73f92008-10-17 17:51:15 +0200535 isa = platform_get_drvdata(pdev);
536
537 if (lm78_read_value(isa, LM78_REG_I2C_ADDR) != client->addr)
538 return 0; /* Address doesn't match */
539 if ((lm78_read_value(isa, LM78_REG_CHIPID) & 0xfe) != (chipid & 0xfe))
540 return 0; /* Chip type doesn't match */
541
542 /* We compare all the limit registers, the config register and the
543 * interrupt mask registers */
544 for (i = 0x2b; i <= 0x3d; i++) {
Jean Delvare0c6e9732008-10-17 17:51:16 +0200545 if (lm78_read_value(isa, i) !=
546 i2c_smbus_read_byte_data(client, i))
Jean Delvare18c73f92008-10-17 17:51:15 +0200547 return 0;
548 }
549 if (lm78_read_value(isa, LM78_REG_CONFIG) !=
Jean Delvare0c6e9732008-10-17 17:51:16 +0200550 i2c_smbus_read_byte_data(client, LM78_REG_CONFIG))
Jean Delvare18c73f92008-10-17 17:51:15 +0200551 return 0;
552 for (i = 0x43; i <= 0x46; i++) {
Jean Delvare0c6e9732008-10-17 17:51:16 +0200553 if (lm78_read_value(isa, i) !=
554 i2c_smbus_read_byte_data(client, i))
Jean Delvare18c73f92008-10-17 17:51:15 +0200555 return 0;
556 }
557
558 return 1;
559}
560
Jean Delvare0c6e9732008-10-17 17:51:16 +0200561static int lm78_i2c_detect(struct i2c_client *client, int kind,
562 struct i2c_board_info *info)
Linus Torvalds1da177e2005-04-16 15:20:36 -0700563{
Jean Delvare0c6e9732008-10-17 17:51:16 +0200564 int i;
565 struct lm78_data *isa = pdev ? platform_get_drvdata(pdev) : NULL;
566 const char *client_name;
567 struct i2c_adapter *adapter = client->adapter;
568 int address = client->addr;
Linus Torvalds1da177e2005-04-16 15:20:36 -0700569
Jean Delvare0c6e9732008-10-17 17:51:16 +0200570 if (!i2c_check_functionality(adapter, I2C_FUNC_SMBUS_BYTE_DATA))
571 return -ENODEV;
Linus Torvalds1da177e2005-04-16 15:20:36 -0700572
Jean Delvare0c6e9732008-10-17 17:51:16 +0200573 /* We block updates of the ISA device to minimize the risk of
574 concurrent access to the same LM78 chip through different
575 interfaces. */
576 if (isa)
577 mutex_lock(&isa->update_lock);
Linus Torvalds1da177e2005-04-16 15:20:36 -0700578
Linus Torvalds1da177e2005-04-16 15:20:36 -0700579 if (kind < 0) {
Jean Delvare0c6e9732008-10-17 17:51:16 +0200580 if ((i2c_smbus_read_byte_data(client, LM78_REG_CONFIG) & 0x80)
581 || i2c_smbus_read_byte_data(client, LM78_REG_I2C_ADDR)
582 != address)
583 goto err_nodev;
584
Jean Delvaread3273b2008-10-17 17:51:15 +0200585 /* Explicitly prevent the misdetection of Winbond chips */
Jean Delvare0c6e9732008-10-17 17:51:16 +0200586 i = i2c_smbus_read_byte_data(client, 0x4f);
587 if (i == 0xa3 || i == 0x5c)
588 goto err_nodev;
Linus Torvalds1da177e2005-04-16 15:20:36 -0700589 }
590
591 /* Determine the chip type. */
592 if (kind <= 0) {
Jean Delvare0c6e9732008-10-17 17:51:16 +0200593 i = i2c_smbus_read_byte_data(client, LM78_REG_CHIPID);
Jean Delvare27fe0482005-07-27 21:30:16 +0200594 if (i == 0x00 || i == 0x20 /* LM78 */
595 || i == 0x40) /* LM78-J */
Linus Torvalds1da177e2005-04-16 15:20:36 -0700596 kind = lm78;
Linus Torvalds1da177e2005-04-16 15:20:36 -0700597 else if ((i & 0xfe) == 0xc0)
598 kind = lm79;
599 else {
600 if (kind == 0)
601 dev_warn(&adapter->dev, "Ignoring 'force' "
602 "parameter for unknown chip at "
603 "adapter %d, address 0x%02x\n",
604 i2c_adapter_id(adapter), address);
Jean Delvare0c6e9732008-10-17 17:51:16 +0200605 goto err_nodev;
Linus Torvalds1da177e2005-04-16 15:20:36 -0700606 }
Jean Delvare18c73f92008-10-17 17:51:15 +0200607
Jean Delvare0c6e9732008-10-17 17:51:16 +0200608 if (lm78_alias_detect(client, i)) {
Jean Delvare18c73f92008-10-17 17:51:15 +0200609 dev_dbg(&adapter->dev, "Device at 0x%02x appears to "
610 "be the same as ISA device\n", address);
Jean Delvare0c6e9732008-10-17 17:51:16 +0200611 goto err_nodev;
Jean Delvare18c73f92008-10-17 17:51:15 +0200612 }
Linus Torvalds1da177e2005-04-16 15:20:36 -0700613 }
614
Jean Delvare0c6e9732008-10-17 17:51:16 +0200615 if (isa)
616 mutex_unlock(&isa->update_lock);
617
618 switch (kind) {
619 case lm79:
Linus Torvalds1da177e2005-04-16 15:20:36 -0700620 client_name = "lm79";
Jean Delvare0c6e9732008-10-17 17:51:16 +0200621 break;
622 default:
623 client_name = "lm78";
Linus Torvalds1da177e2005-04-16 15:20:36 -0700624 }
Jean Delvare0c6e9732008-10-17 17:51:16 +0200625 strlcpy(info->type, client_name, I2C_NAME_SIZE);
Linus Torvalds1da177e2005-04-16 15:20:36 -0700626
Jean Delvare0c6e9732008-10-17 17:51:16 +0200627 return 0;
Linus Torvalds1da177e2005-04-16 15:20:36 -0700628
Jean Delvare0c6e9732008-10-17 17:51:16 +0200629 err_nodev:
630 if (isa)
631 mutex_unlock(&isa->update_lock);
632 return -ENODEV;
633}
634
635static int lm78_i2c_probe(struct i2c_client *client,
636 const struct i2c_device_id *id)
637{
638 struct lm78_data *data;
639 int err;
640
641 data = kzalloc(sizeof(struct lm78_data), GFP_KERNEL);
642 if (!data)
643 return -ENOMEM;
644
645 i2c_set_clientdata(client, data);
646 data->client = client;
647 data->type = id->driver_data;
Linus Torvalds1da177e2005-04-16 15:20:36 -0700648
649 /* Initialize the LM78 chip */
Jean Delvarec59cc302007-05-08 17:22:01 +0200650 lm78_init_device(data);
Linus Torvalds1da177e2005-04-16 15:20:36 -0700651
Linus Torvalds1da177e2005-04-16 15:20:36 -0700652 /* Register sysfs hooks */
Jean Delvare0c6e9732008-10-17 17:51:16 +0200653 err = sysfs_create_group(&client->dev.kobj, &lm78_group);
654 if (err)
Mark M. Hoffmanc1685f62006-09-24 20:59:49 +0200655 goto ERROR3;
656
Jean Delvare0c6e9732008-10-17 17:51:16 +0200657 data->hwmon_dev = hwmon_device_register(&client->dev);
Tony Jones1beeffe2007-08-20 13:46:20 -0700658 if (IS_ERR(data->hwmon_dev)) {
659 err = PTR_ERR(data->hwmon_dev);
Mark M. Hoffmanc1685f62006-09-24 20:59:49 +0200660 goto ERROR4;
Mark M. Hoffman943b0832005-07-15 21:39:18 -0400661 }
662
Linus Torvalds1da177e2005-04-16 15:20:36 -0700663 return 0;
664
Mark M. Hoffmanc1685f62006-09-24 20:59:49 +0200665ERROR4:
Jean Delvare0c6e9732008-10-17 17:51:16 +0200666 sysfs_remove_group(&client->dev.kobj, &lm78_group);
Mark M. Hoffman943b0832005-07-15 21:39:18 -0400667ERROR3:
Linus Torvalds1da177e2005-04-16 15:20:36 -0700668 kfree(data);
Linus Torvalds1da177e2005-04-16 15:20:36 -0700669 return err;
670}
671
Jean Delvare0c6e9732008-10-17 17:51:16 +0200672static int lm78_i2c_remove(struct i2c_client *client)
Linus Torvalds1da177e2005-04-16 15:20:36 -0700673{
Mark M. Hoffman943b0832005-07-15 21:39:18 -0400674 struct lm78_data *data = i2c_get_clientdata(client);
Linus Torvalds1da177e2005-04-16 15:20:36 -0700675
Tony Jones1beeffe2007-08-20 13:46:20 -0700676 hwmon_device_unregister(data->hwmon_dev);
Mark M. Hoffmanc1685f62006-09-24 20:59:49 +0200677 sysfs_remove_group(&client->dev.kobj, &lm78_group);
Jean Delvarec40769f2007-05-08 17:22:00 +0200678 kfree(data);
Linus Torvalds1da177e2005-04-16 15:20:36 -0700679
Jean Delvarec40769f2007-05-08 17:22:00 +0200680 return 0;
681}
682
683static int __devinit lm78_isa_probe(struct platform_device *pdev)
684{
685 int err;
686 struct lm78_data *data;
687 struct resource *res;
Jean Delvarec40769f2007-05-08 17:22:00 +0200688
689 /* Reserve the ISA region */
690 res = platform_get_resource(pdev, IORESOURCE_IO, 0);
Jean Delvare47c15532008-10-17 17:51:15 +0200691 if (!request_region(res->start + LM78_ADDR_REG_OFFSET, 2, "lm78")) {
Jean Delvarec40769f2007-05-08 17:22:00 +0200692 err = -EBUSY;
693 goto exit;
694 }
695
696 if (!(data = kzalloc(sizeof(struct lm78_data), GFP_KERNEL))) {
697 err = -ENOMEM;
698 goto exit_release_region;
699 }
700 mutex_init(&data->lock);
Jean Delvare6e1b5022008-10-17 17:51:15 +0200701 data->isa_addr = res->start;
Jean Delvarec40769f2007-05-08 17:22:00 +0200702 platform_set_drvdata(pdev, data);
703
Jean Delvarec59cc302007-05-08 17:22:01 +0200704 if (lm78_read_value(data, LM78_REG_CHIPID) & 0x80) {
Jean Delvarec40769f2007-05-08 17:22:00 +0200705 data->type = lm79;
Jean Delvare6e1b5022008-10-17 17:51:15 +0200706 data->name = "lm79";
Jean Delvarec40769f2007-05-08 17:22:00 +0200707 } else {
708 data->type = lm78;
Jean Delvare6e1b5022008-10-17 17:51:15 +0200709 data->name = "lm78";
Jean Delvarec40769f2007-05-08 17:22:00 +0200710 }
Jean Delvarec40769f2007-05-08 17:22:00 +0200711
712 /* Initialize the LM78 chip */
Jean Delvarec59cc302007-05-08 17:22:01 +0200713 lm78_init_device(data);
Jean Delvarec40769f2007-05-08 17:22:00 +0200714
715 /* Register sysfs hooks */
716 if ((err = sysfs_create_group(&pdev->dev.kobj, &lm78_group))
717 || (err = device_create_file(&pdev->dev, &dev_attr_name)))
718 goto exit_remove_files;
719
Tony Jones1beeffe2007-08-20 13:46:20 -0700720 data->hwmon_dev = hwmon_device_register(&pdev->dev);
721 if (IS_ERR(data->hwmon_dev)) {
722 err = PTR_ERR(data->hwmon_dev);
Jean Delvarec40769f2007-05-08 17:22:00 +0200723 goto exit_remove_files;
724 }
725
726 return 0;
727
728 exit_remove_files:
729 sysfs_remove_group(&pdev->dev.kobj, &lm78_group);
730 device_remove_file(&pdev->dev, &dev_attr_name);
731 kfree(data);
732 exit_release_region:
Jean Delvare47c15532008-10-17 17:51:15 +0200733 release_region(res->start + LM78_ADDR_REG_OFFSET, 2);
Jean Delvarec40769f2007-05-08 17:22:00 +0200734 exit:
735 return err;
736}
737
738static int __devexit lm78_isa_remove(struct platform_device *pdev)
739{
740 struct lm78_data *data = platform_get_drvdata(pdev);
Jean Delvare6e1b5022008-10-17 17:51:15 +0200741 struct resource *res;
Jean Delvarec40769f2007-05-08 17:22:00 +0200742
Tony Jones1beeffe2007-08-20 13:46:20 -0700743 hwmon_device_unregister(data->hwmon_dev);
Jean Delvarec40769f2007-05-08 17:22:00 +0200744 sysfs_remove_group(&pdev->dev.kobj, &lm78_group);
745 device_remove_file(&pdev->dev, &dev_attr_name);
Mark M. Hoffman943b0832005-07-15 21:39:18 -0400746 kfree(data);
Linus Torvalds1da177e2005-04-16 15:20:36 -0700747
Jean Delvare6e1b5022008-10-17 17:51:15 +0200748 res = platform_get_resource(pdev, IORESOURCE_IO, 0);
749 release_region(res->start + LM78_ADDR_REG_OFFSET, 2);
750
Linus Torvalds1da177e2005-04-16 15:20:36 -0700751 return 0;
752}
753
Steven Cole44bbe872005-05-03 18:21:25 -0600754/* The SMBus locks itself, but ISA access must be locked explicitly!
Linus Torvalds1da177e2005-04-16 15:20:36 -0700755 We don't want to lock the whole ISA bus, so we lock each client
756 separately.
757 We ignore the LM78 BUSY flag at this moment - it could lead to deadlocks,
758 would slow down the LM78 access and should not be necessary. */
Jean Delvarec59cc302007-05-08 17:22:01 +0200759static int lm78_read_value(struct lm78_data *data, u8 reg)
Linus Torvalds1da177e2005-04-16 15:20:36 -0700760{
Jean Delvare0c6e9732008-10-17 17:51:16 +0200761 struct i2c_client *client = data->client;
Jean Delvarec59cc302007-05-08 17:22:01 +0200762
Jean Delvare0c6e9732008-10-17 17:51:16 +0200763 if (!client) { /* ISA device */
Jean Delvarec59cc302007-05-08 17:22:01 +0200764 int res;
Ingo Molnar9a61bf62006-01-18 23:19:26 +0100765 mutex_lock(&data->lock);
Jean Delvare6e1b5022008-10-17 17:51:15 +0200766 outb_p(reg, data->isa_addr + LM78_ADDR_REG_OFFSET);
767 res = inb_p(data->isa_addr + LM78_DATA_REG_OFFSET);
Ingo Molnar9a61bf62006-01-18 23:19:26 +0100768 mutex_unlock(&data->lock);
Linus Torvalds1da177e2005-04-16 15:20:36 -0700769 return res;
770 } else
771 return i2c_smbus_read_byte_data(client, reg);
772}
773
Steven Cole44bbe872005-05-03 18:21:25 -0600774/* The SMBus locks itself, but ISA access muse be locked explicitly!
Linus Torvalds1da177e2005-04-16 15:20:36 -0700775 We don't want to lock the whole ISA bus, so we lock each client
776 separately.
777 We ignore the LM78 BUSY flag at this moment - it could lead to deadlocks,
778 would slow down the LM78 access and should not be necessary.
779 There are some ugly typecasts here, but the good new is - they should
780 nowhere else be necessary! */
Jean Delvarec59cc302007-05-08 17:22:01 +0200781static int lm78_write_value(struct lm78_data *data, u8 reg, u8 value)
Linus Torvalds1da177e2005-04-16 15:20:36 -0700782{
Jean Delvare0c6e9732008-10-17 17:51:16 +0200783 struct i2c_client *client = data->client;
Jean Delvarec59cc302007-05-08 17:22:01 +0200784
Jean Delvare0c6e9732008-10-17 17:51:16 +0200785 if (!client) { /* ISA device */
Ingo Molnar9a61bf62006-01-18 23:19:26 +0100786 mutex_lock(&data->lock);
Jean Delvare6e1b5022008-10-17 17:51:15 +0200787 outb_p(reg, data->isa_addr + LM78_ADDR_REG_OFFSET);
788 outb_p(value, data->isa_addr + LM78_DATA_REG_OFFSET);
Ingo Molnar9a61bf62006-01-18 23:19:26 +0100789 mutex_unlock(&data->lock);
Linus Torvalds1da177e2005-04-16 15:20:36 -0700790 return 0;
791 } else
792 return i2c_smbus_write_byte_data(client, reg, value);
793}
794
Jean Delvarec59cc302007-05-08 17:22:01 +0200795static void lm78_init_device(struct lm78_data *data)
Linus Torvalds1da177e2005-04-16 15:20:36 -0700796{
Jean Delvarec40769f2007-05-08 17:22:00 +0200797 u8 config;
798 int i;
Linus Torvalds1da177e2005-04-16 15:20:36 -0700799
800 /* Start monitoring */
Jean Delvarec59cc302007-05-08 17:22:01 +0200801 config = lm78_read_value(data, LM78_REG_CONFIG);
Jean Delvarec40769f2007-05-08 17:22:00 +0200802 if ((config & 0x09) != 0x01)
Jean Delvarec59cc302007-05-08 17:22:01 +0200803 lm78_write_value(data, LM78_REG_CONFIG,
Linus Torvalds1da177e2005-04-16 15:20:36 -0700804 (config & 0xf7) | 0x01);
Jean Delvarec40769f2007-05-08 17:22:00 +0200805
806 /* A few vars need to be filled upon startup */
807 for (i = 0; i < 3; i++) {
Jean Delvarec59cc302007-05-08 17:22:01 +0200808 data->fan_min[i] = lm78_read_value(data,
Jean Delvarec40769f2007-05-08 17:22:00 +0200809 LM78_REG_FAN_MIN(i));
810 }
811
812 mutex_init(&data->update_lock);
Linus Torvalds1da177e2005-04-16 15:20:36 -0700813}
814
815static struct lm78_data *lm78_update_device(struct device *dev)
816{
Jean Delvarec40769f2007-05-08 17:22:00 +0200817 struct lm78_data *data = dev_get_drvdata(dev);
Linus Torvalds1da177e2005-04-16 15:20:36 -0700818 int i;
819
Ingo Molnar9a61bf62006-01-18 23:19:26 +0100820 mutex_lock(&data->update_lock);
Linus Torvalds1da177e2005-04-16 15:20:36 -0700821
822 if (time_after(jiffies, data->last_updated + HZ + HZ / 2)
823 || !data->valid) {
824
Jean Delvarec40769f2007-05-08 17:22:00 +0200825 dev_dbg(dev, "Starting lm78 update\n");
Linus Torvalds1da177e2005-04-16 15:20:36 -0700826
827 for (i = 0; i <= 6; i++) {
828 data->in[i] =
Jean Delvarec59cc302007-05-08 17:22:01 +0200829 lm78_read_value(data, LM78_REG_IN(i));
Linus Torvalds1da177e2005-04-16 15:20:36 -0700830 data->in_min[i] =
Jean Delvarec59cc302007-05-08 17:22:01 +0200831 lm78_read_value(data, LM78_REG_IN_MIN(i));
Linus Torvalds1da177e2005-04-16 15:20:36 -0700832 data->in_max[i] =
Jean Delvarec59cc302007-05-08 17:22:01 +0200833 lm78_read_value(data, LM78_REG_IN_MAX(i));
Linus Torvalds1da177e2005-04-16 15:20:36 -0700834 }
835 for (i = 0; i < 3; i++) {
836 data->fan[i] =
Jean Delvarec59cc302007-05-08 17:22:01 +0200837 lm78_read_value(data, LM78_REG_FAN(i));
Linus Torvalds1da177e2005-04-16 15:20:36 -0700838 data->fan_min[i] =
Jean Delvarec59cc302007-05-08 17:22:01 +0200839 lm78_read_value(data, LM78_REG_FAN_MIN(i));
Linus Torvalds1da177e2005-04-16 15:20:36 -0700840 }
Jean Delvarec59cc302007-05-08 17:22:01 +0200841 data->temp = lm78_read_value(data, LM78_REG_TEMP);
Linus Torvalds1da177e2005-04-16 15:20:36 -0700842 data->temp_over =
Jean Delvarec59cc302007-05-08 17:22:01 +0200843 lm78_read_value(data, LM78_REG_TEMP_OVER);
Linus Torvalds1da177e2005-04-16 15:20:36 -0700844 data->temp_hyst =
Jean Delvarec59cc302007-05-08 17:22:01 +0200845 lm78_read_value(data, LM78_REG_TEMP_HYST);
846 i = lm78_read_value(data, LM78_REG_VID_FANDIV);
Linus Torvalds1da177e2005-04-16 15:20:36 -0700847 data->vid = i & 0x0f;
848 if (data->type == lm79)
849 data->vid |=
Jean Delvarec59cc302007-05-08 17:22:01 +0200850 (lm78_read_value(data, LM78_REG_CHIPID) &
Linus Torvalds1da177e2005-04-16 15:20:36 -0700851 0x01) << 4;
852 else
853 data->vid |= 0x10;
854 data->fan_div[0] = (i >> 4) & 0x03;
855 data->fan_div[1] = i >> 6;
Jean Delvarec59cc302007-05-08 17:22:01 +0200856 data->alarms = lm78_read_value(data, LM78_REG_ALARM1) +
857 (lm78_read_value(data, LM78_REG_ALARM2) << 8);
Linus Torvalds1da177e2005-04-16 15:20:36 -0700858 data->last_updated = jiffies;
859 data->valid = 1;
860
861 data->fan_div[2] = 1;
862 }
863
Ingo Molnar9a61bf62006-01-18 23:19:26 +0100864 mutex_unlock(&data->update_lock);
Linus Torvalds1da177e2005-04-16 15:20:36 -0700865
866 return data;
867}
868
Jean Delvarec40769f2007-05-08 17:22:00 +0200869/* return 1 if a supported chip is found, 0 otherwise */
870static int __init lm78_isa_found(unsigned short address)
871{
872 int val, save, found = 0;
873
Jean Delvare47c15532008-10-17 17:51:15 +0200874 /* We have to request the region in two parts because some
875 boards declare base+4 to base+7 as a PNP device */
876 if (!request_region(address, 4, "lm78")) {
877 pr_debug("lm78: Failed to request low part of region\n");
Jean Delvarec40769f2007-05-08 17:22:00 +0200878 return 0;
Jean Delvare47c15532008-10-17 17:51:15 +0200879 }
880 if (!request_region(address + 4, 4, "lm78")) {
881 pr_debug("lm78: Failed to request high part of region\n");
882 release_region(address, 4);
883 return 0;
884 }
Jean Delvarec40769f2007-05-08 17:22:00 +0200885
886#define REALLY_SLOW_IO
887 /* We need the timeouts for at least some LM78-like
888 chips. But only if we read 'undefined' registers. */
889 val = inb_p(address + 1);
890 if (inb_p(address + 2) != val
891 || inb_p(address + 3) != val
892 || inb_p(address + 7) != val)
893 goto release;
894#undef REALLY_SLOW_IO
895
896 /* We should be able to change the 7 LSB of the address port. The
897 MSB (busy flag) should be clear initially, set after the write. */
898 save = inb_p(address + LM78_ADDR_REG_OFFSET);
899 if (save & 0x80)
900 goto release;
901 val = ~save & 0x7f;
902 outb_p(val, address + LM78_ADDR_REG_OFFSET);
903 if (inb_p(address + LM78_ADDR_REG_OFFSET) != (val | 0x80)) {
904 outb_p(save, address + LM78_ADDR_REG_OFFSET);
905 goto release;
906 }
907
908 /* We found a device, now see if it could be an LM78 */
909 outb_p(LM78_REG_CONFIG, address + LM78_ADDR_REG_OFFSET);
910 val = inb_p(address + LM78_DATA_REG_OFFSET);
911 if (val & 0x80)
912 goto release;
913 outb_p(LM78_REG_I2C_ADDR, address + LM78_ADDR_REG_OFFSET);
914 val = inb_p(address + LM78_DATA_REG_OFFSET);
915 if (val < 0x03 || val > 0x77) /* Not a valid I2C address */
916 goto release;
917
918 /* The busy flag should be clear again */
919 if (inb_p(address + LM78_ADDR_REG_OFFSET) & 0x80)
920 goto release;
921
922 /* Explicitly prevent the misdetection of Winbond chips */
923 outb_p(0x4f, address + LM78_ADDR_REG_OFFSET);
924 val = inb_p(address + LM78_DATA_REG_OFFSET);
925 if (val == 0xa3 || val == 0x5c)
926 goto release;
927
928 /* Explicitly prevent the misdetection of ITE chips */
929 outb_p(0x58, address + LM78_ADDR_REG_OFFSET);
930 val = inb_p(address + LM78_DATA_REG_OFFSET);
931 if (val == 0x90)
932 goto release;
933
934 /* Determine the chip type */
935 outb_p(LM78_REG_CHIPID, address + LM78_ADDR_REG_OFFSET);
936 val = inb_p(address + LM78_DATA_REG_OFFSET);
Hans de Goedeacf346a2007-07-24 23:36:00 +0200937 if (val == 0x00 || val == 0x20 /* LM78 */
Jean Delvarec40769f2007-05-08 17:22:00 +0200938 || val == 0x40 /* LM78-J */
939 || (val & 0xfe) == 0xc0) /* LM79 */
940 found = 1;
941
942 if (found)
943 pr_info("lm78: Found an %s chip at %#x\n",
944 val & 0x80 ? "LM79" : "LM78", (int)address);
945
946 release:
Jean Delvare47c15532008-10-17 17:51:15 +0200947 release_region(address + 4, 4);
948 release_region(address, 4);
Jean Delvarec40769f2007-05-08 17:22:00 +0200949 return found;
950}
951
952static int __init lm78_isa_device_add(unsigned short address)
953{
954 struct resource res = {
955 .start = address,
Jean Delvare15bde2f2007-08-29 10:39:57 +0200956 .end = address + LM78_EXTENT - 1,
Jean Delvarec40769f2007-05-08 17:22:00 +0200957 .name = "lm78",
958 .flags = IORESOURCE_IO,
959 };
960 int err;
961
962 pdev = platform_device_alloc("lm78", address);
963 if (!pdev) {
964 err = -ENOMEM;
965 printk(KERN_ERR "lm78: Device allocation failed\n");
966 goto exit;
967 }
968
969 err = platform_device_add_resources(pdev, &res, 1);
970 if (err) {
971 printk(KERN_ERR "lm78: Device resource addition failed "
972 "(%d)\n", err);
973 goto exit_device_put;
974 }
975
976 err = platform_device_add(pdev);
977 if (err) {
978 printk(KERN_ERR "lm78: Device addition failed (%d)\n",
979 err);
980 goto exit_device_put;
981 }
982
983 return 0;
984
985 exit_device_put:
986 platform_device_put(pdev);
987 exit:
988 pdev = NULL;
989 return err;
990}
991
Linus Torvalds1da177e2005-04-16 15:20:36 -0700992static int __init sm_lm78_init(void)
993{
Jean Delvarefde09502005-07-19 23:51:07 +0200994 int res;
995
Jean Delvare18c73f92008-10-17 17:51:15 +0200996 /* We register the ISA device first, so that we can skip the
997 * registration of an I2C interface to the same device. */
Jean Delvarec40769f2007-05-08 17:22:00 +0200998 if (lm78_isa_found(isa_address)) {
999 res = platform_driver_register(&lm78_isa_driver);
1000 if (res)
Jean Delvare18c73f92008-10-17 17:51:15 +02001001 goto exit;
Jean Delvarec40769f2007-05-08 17:22:00 +02001002
1003 /* Sets global pdev as a side effect */
1004 res = lm78_isa_device_add(isa_address);
1005 if (res)
1006 goto exit_unreg_isa_driver;
1007 }
Jean Delvarefde09502005-07-19 23:51:07 +02001008
Jean Delvare18c73f92008-10-17 17:51:15 +02001009 res = i2c_add_driver(&lm78_driver);
1010 if (res)
1011 goto exit_unreg_isa_device;
1012
Jean Delvarefde09502005-07-19 23:51:07 +02001013 return 0;
Jean Delvarec40769f2007-05-08 17:22:00 +02001014
Jean Delvare18c73f92008-10-17 17:51:15 +02001015 exit_unreg_isa_device:
1016 platform_device_unregister(pdev);
Jean Delvarec40769f2007-05-08 17:22:00 +02001017 exit_unreg_isa_driver:
1018 platform_driver_unregister(&lm78_isa_driver);
Jean Delvarec40769f2007-05-08 17:22:00 +02001019 exit:
1020 return res;
Linus Torvalds1da177e2005-04-16 15:20:36 -07001021}
1022
1023static void __exit sm_lm78_exit(void)
1024{
Jean Delvarec40769f2007-05-08 17:22:00 +02001025 if (pdev) {
1026 platform_device_unregister(pdev);
1027 platform_driver_unregister(&lm78_isa_driver);
1028 }
Linus Torvalds1da177e2005-04-16 15:20:36 -07001029 i2c_del_driver(&lm78_driver);
1030}
1031
1032
1033
1034MODULE_AUTHOR("Frodo Looijaard <frodol@dds.nl>");
Jean Delvare27fe0482005-07-27 21:30:16 +02001035MODULE_DESCRIPTION("LM78/LM79 driver");
Linus Torvalds1da177e2005-04-16 15:20:36 -07001036MODULE_LICENSE("GPL");
1037
1038module_init(sm_lm78_init);
1039module_exit(sm_lm78_exit);