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Linus Torvalds1da177e2005-04-16 15:20:36 -07001/*
2 * adm1025.c
3 *
4 * Copyright (C) 2000 Chen-Yuan Wu <gwu@esoft.com>
5 * Copyright (C) 2003-2004 Jean Delvare <khali@linux-fr.org>
6 *
7 * The ADM1025 is a sensor chip made by Analog Devices. It reports up to 6
8 * voltages (including its own power source) and up to two temperatures
9 * (its own plus up to one external one). Voltages are scaled internally
10 * (which is not the common way) with ratios such that the nominal value
11 * of each voltage correspond to a register value of 192 (which means a
12 * resolution of about 0.5% of the nominal value). Temperature values are
13 * reported with a 1 deg resolution and a 3 deg accuracy. Complete
14 * datasheet can be obtained from Analog's website at:
15 * http://www.analog.com/Analog_Root/productPage/productHome/0,2121,ADM1025,00.html
16 *
17 * This driver also supports the ADM1025A, which differs from the ADM1025
18 * only in that it has "open-drain VID inputs while the ADM1025 has
19 * on-chip 100k pull-ups on the VID inputs". It doesn't make any
20 * difference for us.
21 *
22 * This driver also supports the NE1619, a sensor chip made by Philips.
23 * That chip is similar to the ADM1025A, with a few differences. The only
24 * difference that matters to us is that the NE1619 has only two possible
25 * addresses while the ADM1025A has a third one. Complete datasheet can be
26 * obtained from Philips's website at:
27 * http://www.semiconductors.philips.com/pip/NE1619DS.html
28 *
29 * Since the ADM1025 was the first chipset supported by this driver, most
30 * comments will refer to this chipset, but are actually general and
31 * concern all supported chipsets, unless mentioned otherwise.
32 *
33 * This program is free software; you can redistribute it and/or modify
34 * it under the terms of the GNU General Public License as published by
35 * the Free Software Foundation; either version 2 of the License, or
36 * (at your option) any later version.
37 *
38 * This program is distributed in the hope that it will be useful,
39 * but WITHOUT ANY WARRANTY; without even the implied warranty of
40 * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
41 * GNU General Public License for more details.
42 *
43 * You should have received a copy of the GNU General Public License
44 * along with this program; if not, write to the Free Software
45 * Foundation, Inc., 675 Mass Ave, Cambridge, MA 02139, USA.
46 */
47
Linus Torvalds1da177e2005-04-16 15:20:36 -070048#include <linux/module.h>
49#include <linux/init.h>
50#include <linux/slab.h>
51#include <linux/jiffies.h>
52#include <linux/i2c.h>
Mark M. Hoffman943b0832005-07-15 21:39:18 -040053#include <linux/hwmon.h>
Jean Delvared8543e72007-10-10 21:11:01 +020054#include <linux/hwmon-sysfs.h>
Jean Delvare303760b2005-07-31 21:52:01 +020055#include <linux/hwmon-vid.h>
Mark M. Hoffman943b0832005-07-15 21:39:18 -040056#include <linux/err.h>
Ingo Molnar9a61bf62006-01-18 23:19:26 +010057#include <linux/mutex.h>
Linus Torvalds1da177e2005-04-16 15:20:36 -070058
59/*
60 * Addresses to scan
61 * ADM1025 and ADM1025A have three possible addresses: 0x2c, 0x2d and 0x2e.
62 * NE1619 has two possible addresses: 0x2c and 0x2d.
63 */
64
Mark M. Hoffman25e9c862008-02-17 22:28:03 -050065static const unsigned short normal_i2c[] = { 0x2c, 0x2d, 0x2e, I2C_CLIENT_END };
Linus Torvalds1da177e2005-04-16 15:20:36 -070066
67/*
68 * Insmod parameters
69 */
70
Jean Delvaref4b50262005-07-31 21:49:03 +020071I2C_CLIENT_INSMOD_2(adm1025, ne1619);
Linus Torvalds1da177e2005-04-16 15:20:36 -070072
73/*
74 * The ADM1025 registers
75 */
76
77#define ADM1025_REG_MAN_ID 0x3E
Jean Delvare4e952792007-10-10 21:14:11 +020078#define ADM1025_REG_CHIP_ID 0x3F
Linus Torvalds1da177e2005-04-16 15:20:36 -070079#define ADM1025_REG_CONFIG 0x40
80#define ADM1025_REG_STATUS1 0x41
81#define ADM1025_REG_STATUS2 0x42
82#define ADM1025_REG_IN(nr) (0x20 + (nr))
83#define ADM1025_REG_IN_MAX(nr) (0x2B + (nr) * 2)
84#define ADM1025_REG_IN_MIN(nr) (0x2C + (nr) * 2)
85#define ADM1025_REG_TEMP(nr) (0x26 + (nr))
86#define ADM1025_REG_TEMP_HIGH(nr) (0x37 + (nr) * 2)
87#define ADM1025_REG_TEMP_LOW(nr) (0x38 + (nr) * 2)
88#define ADM1025_REG_VID 0x47
89#define ADM1025_REG_VID4 0x49
90
91/*
92 * Conversions and various macros
93 * The ADM1025 uses signed 8-bit values for temperatures.
94 */
95
Jean Delvare4e952792007-10-10 21:14:11 +020096static const int in_scale[6] = { 2500, 2250, 3300, 5000, 12000, 3300 };
Linus Torvalds1da177e2005-04-16 15:20:36 -070097
98#define IN_FROM_REG(reg,scale) (((reg) * (scale) + 96) / 192)
99#define IN_TO_REG(val,scale) ((val) <= 0 ? 0 : \
100 (val) * 192 >= (scale) * 255 ? 255 : \
101 ((val) * 192 + (scale)/2) / (scale))
102
103#define TEMP_FROM_REG(reg) ((reg) * 1000)
104#define TEMP_TO_REG(val) ((val) <= -127500 ? -128 : \
105 (val) >= 126500 ? 127 : \
106 (((val) < 0 ? (val)-500 : (val)+500) / 1000))
107
108/*
109 * Functions declaration
110 */
111
112static int adm1025_attach_adapter(struct i2c_adapter *adapter);
113static int adm1025_detect(struct i2c_adapter *adapter, int address, int kind);
114static void adm1025_init_client(struct i2c_client *client);
115static int adm1025_detach_client(struct i2c_client *client);
116static struct adm1025_data *adm1025_update_device(struct device *dev);
117
118/*
119 * Driver data (common to all clients)
120 */
121
122static struct i2c_driver adm1025_driver = {
Laurent Riffardcdaf7932005-11-26 20:37:41 +0100123 .driver = {
Laurent Riffardcdaf7932005-11-26 20:37:41 +0100124 .name = "adm1025",
125 },
Linus Torvalds1da177e2005-04-16 15:20:36 -0700126 .attach_adapter = adm1025_attach_adapter,
127 .detach_client = adm1025_detach_client,
128};
129
130/*
131 * Client data (each client gets its own)
132 */
133
134struct adm1025_data {
135 struct i2c_client client;
Tony Jones1beeffe2007-08-20 13:46:20 -0700136 struct device *hwmon_dev;
Ingo Molnar9a61bf62006-01-18 23:19:26 +0100137 struct mutex update_lock;
Linus Torvalds1da177e2005-04-16 15:20:36 -0700138 char valid; /* zero until following fields are valid */
139 unsigned long last_updated; /* in jiffies */
140
141 u8 in[6]; /* register value */
142 u8 in_max[6]; /* register value */
143 u8 in_min[6]; /* register value */
144 s8 temp[2]; /* register value */
145 s8 temp_min[2]; /* register value */
146 s8 temp_max[2]; /* register value */
147 u16 alarms; /* register values, combined */
148 u8 vid; /* register values, combined */
149 u8 vrm;
150};
151
152/*
153 * Sysfs stuff
154 */
155
Jean Delvared8543e72007-10-10 21:11:01 +0200156static ssize_t
157show_in(struct device *dev, struct device_attribute *attr, char *buf)
158{
159 int index = to_sensor_dev_attr(attr)->index;
160 struct adm1025_data *data = adm1025_update_device(dev);
161 return sprintf(buf, "%u\n", IN_FROM_REG(data->in[index],
162 in_scale[index]));
163}
Linus Torvalds1da177e2005-04-16 15:20:36 -0700164
Jean Delvared8543e72007-10-10 21:11:01 +0200165static ssize_t
166show_in_min(struct device *dev, struct device_attribute *attr, char *buf)
167{
168 int index = to_sensor_dev_attr(attr)->index;
169 struct adm1025_data *data = adm1025_update_device(dev);
170 return sprintf(buf, "%u\n", IN_FROM_REG(data->in_min[index],
171 in_scale[index]));
172}
173
174static ssize_t
175show_in_max(struct device *dev, struct device_attribute *attr, char *buf)
176{
177 int index = to_sensor_dev_attr(attr)->index;
178 struct adm1025_data *data = adm1025_update_device(dev);
179 return sprintf(buf, "%u\n", IN_FROM_REG(data->in_max[index],
180 in_scale[index]));
181}
182
183static ssize_t
184show_temp(struct device *dev, struct device_attribute *attr, char *buf)
185{
186 int index = to_sensor_dev_attr(attr)->index;
187 struct adm1025_data *data = adm1025_update_device(dev);
188 return sprintf(buf, "%d\n", TEMP_FROM_REG(data->temp[index]));
189}
190
191static ssize_t
192show_temp_min(struct device *dev, struct device_attribute *attr, char *buf)
193{
194 int index = to_sensor_dev_attr(attr)->index;
195 struct adm1025_data *data = adm1025_update_device(dev);
196 return sprintf(buf, "%d\n", TEMP_FROM_REG(data->temp_min[index]));
197}
198
199static ssize_t
200show_temp_max(struct device *dev, struct device_attribute *attr, char *buf)
201{
202 int index = to_sensor_dev_attr(attr)->index;
203 struct adm1025_data *data = adm1025_update_device(dev);
204 return sprintf(buf, "%d\n", TEMP_FROM_REG(data->temp_max[index]));
205}
206
207static ssize_t set_in_min(struct device *dev, struct device_attribute *attr,
208 const char *buf, size_t count)
209{
210 int index = to_sensor_dev_attr(attr)->index;
211 struct i2c_client *client = to_i2c_client(dev);
212 struct adm1025_data *data = i2c_get_clientdata(client);
213 long val = simple_strtol(buf, NULL, 10);
214
215 mutex_lock(&data->update_lock);
216 data->in_min[index] = IN_TO_REG(val, in_scale[index]);
217 i2c_smbus_write_byte_data(client, ADM1025_REG_IN_MIN(index),
218 data->in_min[index]);
219 mutex_unlock(&data->update_lock);
220 return count;
221}
222
223static ssize_t set_in_max(struct device *dev, struct device_attribute *attr,
224 const char *buf, size_t count)
225{
226 int index = to_sensor_dev_attr(attr)->index;
227 struct i2c_client *client = to_i2c_client(dev);
228 struct adm1025_data *data = i2c_get_clientdata(client);
229 long val = simple_strtol(buf, NULL, 10);
230
231 mutex_lock(&data->update_lock);
232 data->in_max[index] = IN_TO_REG(val, in_scale[index]);
233 i2c_smbus_write_byte_data(client, ADM1025_REG_IN_MAX(index),
234 data->in_max[index]);
235 mutex_unlock(&data->update_lock);
236 return count;
237}
Linus Torvalds1da177e2005-04-16 15:20:36 -0700238
239#define set_in(offset) \
Jean Delvared8543e72007-10-10 21:11:01 +0200240static SENSOR_DEVICE_ATTR(in##offset##_input, S_IRUGO, \
241 show_in, NULL, offset); \
242static SENSOR_DEVICE_ATTR(in##offset##_min, S_IWUSR | S_IRUGO, \
243 show_in_min, set_in_min, offset); \
244static SENSOR_DEVICE_ATTR(in##offset##_max, S_IWUSR | S_IRUGO, \
245 show_in_max, set_in_max, offset)
Linus Torvalds1da177e2005-04-16 15:20:36 -0700246set_in(0);
247set_in(1);
248set_in(2);
249set_in(3);
250set_in(4);
251set_in(5);
252
Jean Delvared8543e72007-10-10 21:11:01 +0200253static ssize_t set_temp_min(struct device *dev, struct device_attribute *attr,
254 const char *buf, size_t count)
255{
256 int index = to_sensor_dev_attr(attr)->index;
257 struct i2c_client *client = to_i2c_client(dev);
258 struct adm1025_data *data = i2c_get_clientdata(client);
259 long val = simple_strtol(buf, NULL, 10);
260
261 mutex_lock(&data->update_lock);
262 data->temp_min[index] = TEMP_TO_REG(val);
263 i2c_smbus_write_byte_data(client, ADM1025_REG_TEMP_LOW(index),
264 data->temp_min[index]);
265 mutex_unlock(&data->update_lock);
266 return count;
267}
268
269static ssize_t set_temp_max(struct device *dev, struct device_attribute *attr,
270 const char *buf, size_t count)
271{
272 int index = to_sensor_dev_attr(attr)->index;
273 struct i2c_client *client = to_i2c_client(dev);
274 struct adm1025_data *data = i2c_get_clientdata(client);
275 long val = simple_strtol(buf, NULL, 10);
276
277 mutex_lock(&data->update_lock);
278 data->temp_max[index] = TEMP_TO_REG(val);
279 i2c_smbus_write_byte_data(client, ADM1025_REG_TEMP_HIGH(index),
280 data->temp_max[index]);
281 mutex_unlock(&data->update_lock);
282 return count;
283}
284
Linus Torvalds1da177e2005-04-16 15:20:36 -0700285#define set_temp(offset) \
Jean Delvared8543e72007-10-10 21:11:01 +0200286static SENSOR_DEVICE_ATTR(temp##offset##_input, S_IRUGO, \
287 show_temp, NULL, offset - 1); \
288static SENSOR_DEVICE_ATTR(temp##offset##_min, S_IWUSR | S_IRUGO, \
289 show_temp_min, set_temp_min, offset - 1); \
290static SENSOR_DEVICE_ATTR(temp##offset##_max, S_IWUSR | S_IRUGO, \
291 show_temp_max, set_temp_max, offset - 1)
Linus Torvalds1da177e2005-04-16 15:20:36 -0700292set_temp(1);
293set_temp(2);
294
Jean Delvare4e952792007-10-10 21:14:11 +0200295static ssize_t
296show_alarms(struct device *dev, struct device_attribute *attr, char *buf)
Linus Torvalds1da177e2005-04-16 15:20:36 -0700297{
298 struct adm1025_data *data = adm1025_update_device(dev);
299 return sprintf(buf, "%u\n", data->alarms);
300}
301static DEVICE_ATTR(alarms, S_IRUGO, show_alarms, NULL);
302
Jean Delvarebb081302007-10-10 21:11:52 +0200303static ssize_t
304show_alarm(struct device *dev, struct device_attribute *attr, char *buf)
305{
306 int bitnr = to_sensor_dev_attr(attr)->index;
307 struct adm1025_data *data = adm1025_update_device(dev);
308 return sprintf(buf, "%u\n", (data->alarms >> bitnr) & 1);
309}
310static SENSOR_DEVICE_ATTR(in0_alarm, S_IRUGO, show_alarm, NULL, 0);
311static SENSOR_DEVICE_ATTR(in1_alarm, S_IRUGO, show_alarm, NULL, 1);
312static SENSOR_DEVICE_ATTR(in2_alarm, S_IRUGO, show_alarm, NULL, 2);
313static SENSOR_DEVICE_ATTR(in3_alarm, S_IRUGO, show_alarm, NULL, 3);
314static SENSOR_DEVICE_ATTR(in4_alarm, S_IRUGO, show_alarm, NULL, 8);
315static SENSOR_DEVICE_ATTR(in5_alarm, S_IRUGO, show_alarm, NULL, 9);
316static SENSOR_DEVICE_ATTR(temp1_alarm, S_IRUGO, show_alarm, NULL, 5);
317static SENSOR_DEVICE_ATTR(temp2_alarm, S_IRUGO, show_alarm, NULL, 4);
318static SENSOR_DEVICE_ATTR(temp1_fault, S_IRUGO, show_alarm, NULL, 14);
319
Jean Delvare4e952792007-10-10 21:14:11 +0200320static ssize_t
321show_vid(struct device *dev, struct device_attribute *attr, char *buf)
Linus Torvalds1da177e2005-04-16 15:20:36 -0700322{
323 struct adm1025_data *data = adm1025_update_device(dev);
324 return sprintf(buf, "%u\n", vid_from_reg(data->vid, data->vrm));
325}
Grant Coady937df8d2005-05-12 11:59:29 +1000326static DEVICE_ATTR(cpu0_vid, S_IRUGO, show_vid, NULL);
Linus Torvalds1da177e2005-04-16 15:20:36 -0700327
Jean Delvare4e952792007-10-10 21:14:11 +0200328static ssize_t
329show_vrm(struct device *dev, struct device_attribute *attr, char *buf)
Linus Torvalds1da177e2005-04-16 15:20:36 -0700330{
Jean Delvare90d66192007-10-08 18:24:35 +0200331 struct adm1025_data *data = dev_get_drvdata(dev);
Linus Torvalds1da177e2005-04-16 15:20:36 -0700332 return sprintf(buf, "%u\n", data->vrm);
333}
Jean Delvare4e952792007-10-10 21:14:11 +0200334static ssize_t set_vrm(struct device *dev, struct device_attribute *attr,
335 const char *buf, size_t count)
Linus Torvalds1da177e2005-04-16 15:20:36 -0700336{
Jean Delvare8f74efe2007-12-01 11:25:33 +0100337 struct adm1025_data *data = dev_get_drvdata(dev);
Linus Torvalds1da177e2005-04-16 15:20:36 -0700338 data->vrm = simple_strtoul(buf, NULL, 10);
339 return count;
340}
341static DEVICE_ATTR(vrm, S_IRUGO | S_IWUSR, show_vrm, set_vrm);
342
343/*
344 * Real code
345 */
346
347static int adm1025_attach_adapter(struct i2c_adapter *adapter)
348{
349 if (!(adapter->class & I2C_CLASS_HWMON))
350 return 0;
Jean Delvare2ed2dc32005-07-31 21:42:02 +0200351 return i2c_probe(adapter, &addr_data, adm1025_detect);
Linus Torvalds1da177e2005-04-16 15:20:36 -0700352}
353
Mark M. Hoffman681c6f72006-09-24 21:15:35 +0200354static struct attribute *adm1025_attributes[] = {
Jean Delvared8543e72007-10-10 21:11:01 +0200355 &sensor_dev_attr_in0_input.dev_attr.attr,
356 &sensor_dev_attr_in1_input.dev_attr.attr,
357 &sensor_dev_attr_in2_input.dev_attr.attr,
358 &sensor_dev_attr_in3_input.dev_attr.attr,
359 &sensor_dev_attr_in5_input.dev_attr.attr,
360 &sensor_dev_attr_in0_min.dev_attr.attr,
361 &sensor_dev_attr_in1_min.dev_attr.attr,
362 &sensor_dev_attr_in2_min.dev_attr.attr,
363 &sensor_dev_attr_in3_min.dev_attr.attr,
364 &sensor_dev_attr_in5_min.dev_attr.attr,
365 &sensor_dev_attr_in0_max.dev_attr.attr,
366 &sensor_dev_attr_in1_max.dev_attr.attr,
367 &sensor_dev_attr_in2_max.dev_attr.attr,
368 &sensor_dev_attr_in3_max.dev_attr.attr,
369 &sensor_dev_attr_in5_max.dev_attr.attr,
Jean Delvarebb081302007-10-10 21:11:52 +0200370 &sensor_dev_attr_in0_alarm.dev_attr.attr,
371 &sensor_dev_attr_in1_alarm.dev_attr.attr,
372 &sensor_dev_attr_in2_alarm.dev_attr.attr,
373 &sensor_dev_attr_in3_alarm.dev_attr.attr,
374 &sensor_dev_attr_in5_alarm.dev_attr.attr,
Jean Delvared8543e72007-10-10 21:11:01 +0200375 &sensor_dev_attr_temp1_input.dev_attr.attr,
376 &sensor_dev_attr_temp2_input.dev_attr.attr,
377 &sensor_dev_attr_temp1_min.dev_attr.attr,
378 &sensor_dev_attr_temp2_min.dev_attr.attr,
379 &sensor_dev_attr_temp1_max.dev_attr.attr,
380 &sensor_dev_attr_temp2_max.dev_attr.attr,
Jean Delvarebb081302007-10-10 21:11:52 +0200381 &sensor_dev_attr_temp1_alarm.dev_attr.attr,
382 &sensor_dev_attr_temp2_alarm.dev_attr.attr,
383 &sensor_dev_attr_temp1_fault.dev_attr.attr,
Mark M. Hoffman681c6f72006-09-24 21:15:35 +0200384 &dev_attr_alarms.attr,
385 &dev_attr_cpu0_vid.attr,
386 &dev_attr_vrm.attr,
387 NULL
388};
389
390static const struct attribute_group adm1025_group = {
391 .attrs = adm1025_attributes,
392};
393
Jean Delvare4e952792007-10-10 21:14:11 +0200394static struct attribute *adm1025_attributes_in4[] = {
Jean Delvared8543e72007-10-10 21:11:01 +0200395 &sensor_dev_attr_in4_input.dev_attr.attr,
396 &sensor_dev_attr_in4_min.dev_attr.attr,
397 &sensor_dev_attr_in4_max.dev_attr.attr,
Jean Delvarebb081302007-10-10 21:11:52 +0200398 &sensor_dev_attr_in4_alarm.dev_attr.attr,
Mark M. Hoffman681c6f72006-09-24 21:15:35 +0200399 NULL
400};
401
Jean Delvare4e952792007-10-10 21:14:11 +0200402static const struct attribute_group adm1025_group_in4 = {
403 .attrs = adm1025_attributes_in4,
Mark M. Hoffman681c6f72006-09-24 21:15:35 +0200404};
405
Linus Torvalds1da177e2005-04-16 15:20:36 -0700406/*
407 * The following function does more than just detection. If detection
408 * succeeds, it also registers the new chip.
409 */
410static int adm1025_detect(struct i2c_adapter *adapter, int address, int kind)
411{
Jean Delvare4e952792007-10-10 21:14:11 +0200412 struct i2c_client *client;
Linus Torvalds1da177e2005-04-16 15:20:36 -0700413 struct adm1025_data *data;
414 int err = 0;
415 const char *name = "";
416 u8 config;
417
418 if (!i2c_check_functionality(adapter, I2C_FUNC_SMBUS_BYTE_DATA))
419 goto exit;
420
Deepak Saxenaba9c2e82005-10-17 23:08:32 +0200421 if (!(data = kzalloc(sizeof(struct adm1025_data), GFP_KERNEL))) {
Linus Torvalds1da177e2005-04-16 15:20:36 -0700422 err = -ENOMEM;
423 goto exit;
424 }
Linus Torvalds1da177e2005-04-16 15:20:36 -0700425
Jean Delvare4e952792007-10-10 21:14:11 +0200426 client = &data->client;
427 i2c_set_clientdata(client, data);
428 client->addr = address;
429 client->adapter = adapter;
430 client->driver = &adm1025_driver;
Linus Torvalds1da177e2005-04-16 15:20:36 -0700431
432 /*
433 * Now we do the remaining detection. A negative kind means that
434 * the driver was loaded with no force parameter (default), so we
435 * must both detect and identify the chip. A zero kind means that
436 * the driver was loaded with the force parameter, the detection
437 * step shall be skipped. A positive kind means that the driver
438 * was loaded with the force parameter and a given kind of chip is
439 * requested, so both the detection and the identification steps
440 * are skipped.
441 */
Jean Delvare4e952792007-10-10 21:14:11 +0200442 config = i2c_smbus_read_byte_data(client, ADM1025_REG_CONFIG);
Linus Torvalds1da177e2005-04-16 15:20:36 -0700443 if (kind < 0) { /* detection */
444 if ((config & 0x80) != 0x00
Jean Delvare4e952792007-10-10 21:14:11 +0200445 || (i2c_smbus_read_byte_data(client,
Linus Torvalds1da177e2005-04-16 15:20:36 -0700446 ADM1025_REG_STATUS1) & 0xC0) != 0x00
Jean Delvare4e952792007-10-10 21:14:11 +0200447 || (i2c_smbus_read_byte_data(client,
Linus Torvalds1da177e2005-04-16 15:20:36 -0700448 ADM1025_REG_STATUS2) & 0xBC) != 0x00) {
449 dev_dbg(&adapter->dev,
450 "ADM1025 detection failed at 0x%02x.\n",
451 address);
452 goto exit_free;
453 }
454 }
455
456 if (kind <= 0) { /* identification */
457 u8 man_id, chip_id;
458
Jean Delvare4e952792007-10-10 21:14:11 +0200459 man_id = i2c_smbus_read_byte_data(client, ADM1025_REG_MAN_ID);
460 chip_id = i2c_smbus_read_byte_data(client, ADM1025_REG_CHIP_ID);
461
Linus Torvalds1da177e2005-04-16 15:20:36 -0700462 if (man_id == 0x41) { /* Analog Devices */
463 if ((chip_id & 0xF0) == 0x20) { /* ADM1025/ADM1025A */
464 kind = adm1025;
465 }
466 } else
467 if (man_id == 0xA1) { /* Philips */
468 if (address != 0x2E
469 && (chip_id & 0xF0) == 0x20) { /* NE1619 */
470 kind = ne1619;
471 }
472 }
473
474 if (kind <= 0) { /* identification failed */
475 dev_info(&adapter->dev,
476 "Unsupported chip (man_id=0x%02X, "
477 "chip_id=0x%02X).\n", man_id, chip_id);
478 goto exit_free;
479 }
480 }
481
482 if (kind == adm1025) {
483 name = "adm1025";
484 } else if (kind == ne1619) {
485 name = "ne1619";
486 }
487
488 /* We can fill in the remaining client fields */
Jean Delvare4e952792007-10-10 21:14:11 +0200489 strlcpy(client->name, name, I2C_NAME_SIZE);
Ingo Molnar9a61bf62006-01-18 23:19:26 +0100490 mutex_init(&data->update_lock);
Linus Torvalds1da177e2005-04-16 15:20:36 -0700491
492 /* Tell the I2C layer a new client has arrived */
Jean Delvare4e952792007-10-10 21:14:11 +0200493 if ((err = i2c_attach_client(client)))
Linus Torvalds1da177e2005-04-16 15:20:36 -0700494 goto exit_free;
495
496 /* Initialize the ADM1025 chip */
Jean Delvare4e952792007-10-10 21:14:11 +0200497 adm1025_init_client(client);
Linus Torvalds1da177e2005-04-16 15:20:36 -0700498
499 /* Register sysfs hooks */
Jean Delvare4e952792007-10-10 21:14:11 +0200500 if ((err = sysfs_create_group(&client->dev.kobj, &adm1025_group)))
Mark M. Hoffman943b0832005-07-15 21:39:18 -0400501 goto exit_detach;
Linus Torvalds1da177e2005-04-16 15:20:36 -0700502
503 /* Pin 11 is either in4 (+12V) or VID4 */
504 if (!(config & 0x20)) {
Jean Delvare4e952792007-10-10 21:14:11 +0200505 if ((err = sysfs_create_group(&client->dev.kobj,
506 &adm1025_group_in4)))
Mark M. Hoffman681c6f72006-09-24 21:15:35 +0200507 goto exit_remove;
508 }
509
Jean Delvare4e952792007-10-10 21:14:11 +0200510 data->hwmon_dev = hwmon_device_register(&client->dev);
Tony Jones1beeffe2007-08-20 13:46:20 -0700511 if (IS_ERR(data->hwmon_dev)) {
512 err = PTR_ERR(data->hwmon_dev);
Mark M. Hoffman681c6f72006-09-24 21:15:35 +0200513 goto exit_remove;
Linus Torvalds1da177e2005-04-16 15:20:36 -0700514 }
515
516 return 0;
517
Mark M. Hoffman681c6f72006-09-24 21:15:35 +0200518exit_remove:
Jean Delvare4e952792007-10-10 21:14:11 +0200519 sysfs_remove_group(&client->dev.kobj, &adm1025_group);
520 sysfs_remove_group(&client->dev.kobj, &adm1025_group_in4);
Mark M. Hoffman943b0832005-07-15 21:39:18 -0400521exit_detach:
Jean Delvare4e952792007-10-10 21:14:11 +0200522 i2c_detach_client(client);
Linus Torvalds1da177e2005-04-16 15:20:36 -0700523exit_free:
524 kfree(data);
525exit:
526 return err;
527}
528
529static void adm1025_init_client(struct i2c_client *client)
530{
531 u8 reg;
532 struct adm1025_data *data = i2c_get_clientdata(client);
533 int i;
534
Jean Delvare303760b2005-07-31 21:52:01 +0200535 data->vrm = vid_which_vrm();
Linus Torvalds1da177e2005-04-16 15:20:36 -0700536
537 /*
538 * Set high limits
539 * Usually we avoid setting limits on driver init, but it happens
540 * that the ADM1025 comes with stupid default limits (all registers
541 * set to 0). In case the chip has not gone through any limit
542 * setting yet, we better set the high limits to the max so that
543 * no alarm triggers.
544 */
545 for (i=0; i<6; i++) {
546 reg = i2c_smbus_read_byte_data(client,
547 ADM1025_REG_IN_MAX(i));
548 if (reg == 0)
549 i2c_smbus_write_byte_data(client,
550 ADM1025_REG_IN_MAX(i),
551 0xFF);
552 }
553 for (i=0; i<2; i++) {
554 reg = i2c_smbus_read_byte_data(client,
555 ADM1025_REG_TEMP_HIGH(i));
556 if (reg == 0)
557 i2c_smbus_write_byte_data(client,
558 ADM1025_REG_TEMP_HIGH(i),
559 0x7F);
560 }
561
562 /*
563 * Start the conversions
564 */
565 reg = i2c_smbus_read_byte_data(client, ADM1025_REG_CONFIG);
566 if (!(reg & 0x01))
567 i2c_smbus_write_byte_data(client, ADM1025_REG_CONFIG,
568 (reg&0x7E)|0x01);
569}
570
571static int adm1025_detach_client(struct i2c_client *client)
572{
Mark M. Hoffman943b0832005-07-15 21:39:18 -0400573 struct adm1025_data *data = i2c_get_clientdata(client);
Linus Torvalds1da177e2005-04-16 15:20:36 -0700574 int err;
575
Tony Jones1beeffe2007-08-20 13:46:20 -0700576 hwmon_device_unregister(data->hwmon_dev);
Mark M. Hoffman681c6f72006-09-24 21:15:35 +0200577 sysfs_remove_group(&client->dev.kobj, &adm1025_group);
Jean Delvare4e952792007-10-10 21:14:11 +0200578 sysfs_remove_group(&client->dev.kobj, &adm1025_group_in4);
Mark M. Hoffman943b0832005-07-15 21:39:18 -0400579
Jean Delvare7bef5592005-07-27 22:14:49 +0200580 if ((err = i2c_detach_client(client)))
Linus Torvalds1da177e2005-04-16 15:20:36 -0700581 return err;
Linus Torvalds1da177e2005-04-16 15:20:36 -0700582
Mark M. Hoffman943b0832005-07-15 21:39:18 -0400583 kfree(data);
Linus Torvalds1da177e2005-04-16 15:20:36 -0700584 return 0;
585}
586
587static struct adm1025_data *adm1025_update_device(struct device *dev)
588{
589 struct i2c_client *client = to_i2c_client(dev);
590 struct adm1025_data *data = i2c_get_clientdata(client);
591
Ingo Molnar9a61bf62006-01-18 23:19:26 +0100592 mutex_lock(&data->update_lock);
Linus Torvalds1da177e2005-04-16 15:20:36 -0700593
594 if (time_after(jiffies, data->last_updated + HZ * 2) || !data->valid) {
595 int i;
596
597 dev_dbg(&client->dev, "Updating data.\n");
598 for (i=0; i<6; i++) {
599 data->in[i] = i2c_smbus_read_byte_data(client,
600 ADM1025_REG_IN(i));
601 data->in_min[i] = i2c_smbus_read_byte_data(client,
602 ADM1025_REG_IN_MIN(i));
603 data->in_max[i] = i2c_smbus_read_byte_data(client,
604 ADM1025_REG_IN_MAX(i));
605 }
606 for (i=0; i<2; i++) {
607 data->temp[i] = i2c_smbus_read_byte_data(client,
608 ADM1025_REG_TEMP(i));
609 data->temp_min[i] = i2c_smbus_read_byte_data(client,
610 ADM1025_REG_TEMP_LOW(i));
611 data->temp_max[i] = i2c_smbus_read_byte_data(client,
612 ADM1025_REG_TEMP_HIGH(i));
613 }
614 data->alarms = i2c_smbus_read_byte_data(client,
615 ADM1025_REG_STATUS1)
616 | (i2c_smbus_read_byte_data(client,
617 ADM1025_REG_STATUS2) << 8);
618 data->vid = (i2c_smbus_read_byte_data(client,
619 ADM1025_REG_VID) & 0x0f)
620 | ((i2c_smbus_read_byte_data(client,
621 ADM1025_REG_VID4) & 0x01) << 4);
622
623 data->last_updated = jiffies;
624 data->valid = 1;
625 }
626
Ingo Molnar9a61bf62006-01-18 23:19:26 +0100627 mutex_unlock(&data->update_lock);
Linus Torvalds1da177e2005-04-16 15:20:36 -0700628
629 return data;
630}
631
632static int __init sensors_adm1025_init(void)
633{
634 return i2c_add_driver(&adm1025_driver);
635}
636
637static void __exit sensors_adm1025_exit(void)
638{
639 i2c_del_driver(&adm1025_driver);
640}
641
642MODULE_AUTHOR("Jean Delvare <khali@linux-fr.org>");
643MODULE_DESCRIPTION("ADM1025 driver");
644MODULE_LICENSE("GPL");
645
646module_init(sensors_adm1025_init);
647module_exit(sensors_adm1025_exit);