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1da177e4 LT |
1 | /* |
2 | * adm1025.c | |
3 | * | |
4 | * Copyright (C) 2000 Chen-Yuan Wu <gwu@esoft.com> | |
7dbafe02 | 5 | * Copyright (C) 2003-2008 Jean Delvare <khali@linux-fr.org> |
1da177e4 LT |
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 | ||
1da177e4 LT |
48 | #include <linux/module.h> |
49 | #include <linux/init.h> | |
50 | #include <linux/slab.h> | |
51 | #include <linux/jiffies.h> | |
52 | #include <linux/i2c.h> | |
943b0830 | 53 | #include <linux/hwmon.h> |
d8543e7f | 54 | #include <linux/hwmon-sysfs.h> |
303760b4 | 55 | #include <linux/hwmon-vid.h> |
943b0830 | 56 | #include <linux/err.h> |
9a61bf63 | 57 | #include <linux/mutex.h> |
1da177e4 LT |
58 | |
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 | ||
25e9c86d | 65 | static const unsigned short normal_i2c[] = { 0x2c, 0x2d, 0x2e, I2C_CLIENT_END }; |
1da177e4 LT |
66 | |
67 | /* | |
68 | * Insmod parameters | |
69 | */ | |
70 | ||
f4b50261 | 71 | I2C_CLIENT_INSMOD_2(adm1025, ne1619); |
1da177e4 LT |
72 | |
73 | /* | |
74 | * The ADM1025 registers | |
75 | */ | |
76 | ||
77 | #define ADM1025_REG_MAN_ID 0x3E | |
4e952799 | 78 | #define ADM1025_REG_CHIP_ID 0x3F |
1da177e4 LT |
79 | #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 | ||
4e952799 | 96 | static const int in_scale[6] = { 2500, 2250, 3300, 5000, 12000, 3300 }; |
1da177e4 LT |
97 | |
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 | ||
7dbafe02 JD |
112 | static int adm1025_probe(struct i2c_client *client, |
113 | const struct i2c_device_id *id); | |
114 | static int adm1025_detect(struct i2c_client *client, int kind, | |
115 | struct i2c_board_info *info); | |
1da177e4 | 116 | static void adm1025_init_client(struct i2c_client *client); |
7dbafe02 | 117 | static int adm1025_remove(struct i2c_client *client); |
1da177e4 LT |
118 | static struct adm1025_data *adm1025_update_device(struct device *dev); |
119 | ||
120 | /* | |
121 | * Driver data (common to all clients) | |
122 | */ | |
123 | ||
7dbafe02 JD |
124 | static const struct i2c_device_id adm1025_id[] = { |
125 | { "adm1025", adm1025 }, | |
126 | { "ne1619", ne1619 }, | |
127 | { } | |
128 | }; | |
129 | MODULE_DEVICE_TABLE(i2c, adm1025_id); | |
130 | ||
1da177e4 | 131 | static struct i2c_driver adm1025_driver = { |
7dbafe02 | 132 | .class = I2C_CLASS_HWMON, |
cdaf7934 | 133 | .driver = { |
cdaf7934 LR |
134 | .name = "adm1025", |
135 | }, | |
7dbafe02 JD |
136 | .probe = adm1025_probe, |
137 | .remove = adm1025_remove, | |
138 | .id_table = adm1025_id, | |
139 | .detect = adm1025_detect, | |
140 | .address_data = &addr_data, | |
1da177e4 LT |
141 | }; |
142 | ||
143 | /* | |
144 | * Client data (each client gets its own) | |
145 | */ | |
146 | ||
147 | struct adm1025_data { | |
1beeffe4 | 148 | struct device *hwmon_dev; |
9a61bf63 | 149 | struct mutex update_lock; |
1da177e4 LT |
150 | char valid; /* zero until following fields are valid */ |
151 | unsigned long last_updated; /* in jiffies */ | |
152 | ||
153 | u8 in[6]; /* register value */ | |
154 | u8 in_max[6]; /* register value */ | |
155 | u8 in_min[6]; /* register value */ | |
156 | s8 temp[2]; /* register value */ | |
157 | s8 temp_min[2]; /* register value */ | |
158 | s8 temp_max[2]; /* register value */ | |
159 | u16 alarms; /* register values, combined */ | |
160 | u8 vid; /* register values, combined */ | |
161 | u8 vrm; | |
162 | }; | |
163 | ||
164 | /* | |
165 | * Sysfs stuff | |
166 | */ | |
167 | ||
d8543e7f JD |
168 | static ssize_t |
169 | show_in(struct device *dev, struct device_attribute *attr, char *buf) | |
170 | { | |
171 | int index = to_sensor_dev_attr(attr)->index; | |
172 | struct adm1025_data *data = adm1025_update_device(dev); | |
173 | return sprintf(buf, "%u\n", IN_FROM_REG(data->in[index], | |
174 | in_scale[index])); | |
175 | } | |
176 | ||
177 | static ssize_t | |
178 | show_in_min(struct device *dev, struct device_attribute *attr, char *buf) | |
179 | { | |
180 | int index = to_sensor_dev_attr(attr)->index; | |
181 | struct adm1025_data *data = adm1025_update_device(dev); | |
182 | return sprintf(buf, "%u\n", IN_FROM_REG(data->in_min[index], | |
183 | in_scale[index])); | |
184 | } | |
185 | ||
186 | static ssize_t | |
187 | show_in_max(struct device *dev, struct device_attribute *attr, char *buf) | |
188 | { | |
189 | int index = to_sensor_dev_attr(attr)->index; | |
190 | struct adm1025_data *data = adm1025_update_device(dev); | |
191 | return sprintf(buf, "%u\n", IN_FROM_REG(data->in_max[index], | |
192 | in_scale[index])); | |
193 | } | |
194 | ||
195 | static ssize_t | |
196 | show_temp(struct device *dev, struct device_attribute *attr, char *buf) | |
197 | { | |
198 | int index = to_sensor_dev_attr(attr)->index; | |
199 | struct adm1025_data *data = adm1025_update_device(dev); | |
200 | return sprintf(buf, "%d\n", TEMP_FROM_REG(data->temp[index])); | |
201 | } | |
202 | ||
203 | static ssize_t | |
204 | show_temp_min(struct device *dev, struct device_attribute *attr, char *buf) | |
205 | { | |
206 | int index = to_sensor_dev_attr(attr)->index; | |
207 | struct adm1025_data *data = adm1025_update_device(dev); | |
208 | return sprintf(buf, "%d\n", TEMP_FROM_REG(data->temp_min[index])); | |
209 | } | |
210 | ||
211 | static ssize_t | |
212 | show_temp_max(struct device *dev, struct device_attribute *attr, char *buf) | |
213 | { | |
214 | int index = to_sensor_dev_attr(attr)->index; | |
215 | struct adm1025_data *data = adm1025_update_device(dev); | |
216 | return sprintf(buf, "%d\n", TEMP_FROM_REG(data->temp_max[index])); | |
217 | } | |
218 | ||
219 | static ssize_t set_in_min(struct device *dev, struct device_attribute *attr, | |
220 | const char *buf, size_t count) | |
221 | { | |
222 | int index = to_sensor_dev_attr(attr)->index; | |
223 | struct i2c_client *client = to_i2c_client(dev); | |
224 | struct adm1025_data *data = i2c_get_clientdata(client); | |
225 | long val = simple_strtol(buf, NULL, 10); | |
226 | ||
227 | mutex_lock(&data->update_lock); | |
228 | data->in_min[index] = IN_TO_REG(val, in_scale[index]); | |
229 | i2c_smbus_write_byte_data(client, ADM1025_REG_IN_MIN(index), | |
230 | data->in_min[index]); | |
231 | mutex_unlock(&data->update_lock); | |
232 | return count; | |
233 | } | |
234 | ||
235 | static ssize_t set_in_max(struct device *dev, struct device_attribute *attr, | |
236 | const char *buf, size_t count) | |
237 | { | |
238 | int index = to_sensor_dev_attr(attr)->index; | |
239 | struct i2c_client *client = to_i2c_client(dev); | |
240 | struct adm1025_data *data = i2c_get_clientdata(client); | |
241 | long val = simple_strtol(buf, NULL, 10); | |
242 | ||
243 | mutex_lock(&data->update_lock); | |
244 | data->in_max[index] = IN_TO_REG(val, in_scale[index]); | |
245 | i2c_smbus_write_byte_data(client, ADM1025_REG_IN_MAX(index), | |
246 | data->in_max[index]); | |
247 | mutex_unlock(&data->update_lock); | |
248 | return count; | |
249 | } | |
1da177e4 LT |
250 | |
251 | #define set_in(offset) \ | |
d8543e7f JD |
252 | static SENSOR_DEVICE_ATTR(in##offset##_input, S_IRUGO, \ |
253 | show_in, NULL, offset); \ | |
254 | static SENSOR_DEVICE_ATTR(in##offset##_min, S_IWUSR | S_IRUGO, \ | |
255 | show_in_min, set_in_min, offset); \ | |
256 | static SENSOR_DEVICE_ATTR(in##offset##_max, S_IWUSR | S_IRUGO, \ | |
257 | show_in_max, set_in_max, offset) | |
1da177e4 LT |
258 | set_in(0); |
259 | set_in(1); | |
260 | set_in(2); | |
261 | set_in(3); | |
262 | set_in(4); | |
263 | set_in(5); | |
264 | ||
d8543e7f JD |
265 | static ssize_t set_temp_min(struct device *dev, struct device_attribute *attr, |
266 | const char *buf, size_t count) | |
267 | { | |
268 | int index = to_sensor_dev_attr(attr)->index; | |
269 | struct i2c_client *client = to_i2c_client(dev); | |
270 | struct adm1025_data *data = i2c_get_clientdata(client); | |
271 | long val = simple_strtol(buf, NULL, 10); | |
272 | ||
273 | mutex_lock(&data->update_lock); | |
274 | data->temp_min[index] = TEMP_TO_REG(val); | |
275 | i2c_smbus_write_byte_data(client, ADM1025_REG_TEMP_LOW(index), | |
276 | data->temp_min[index]); | |
277 | mutex_unlock(&data->update_lock); | |
278 | return count; | |
279 | } | |
280 | ||
281 | static ssize_t set_temp_max(struct device *dev, struct device_attribute *attr, | |
282 | const char *buf, size_t count) | |
283 | { | |
284 | int index = to_sensor_dev_attr(attr)->index; | |
285 | struct i2c_client *client = to_i2c_client(dev); | |
286 | struct adm1025_data *data = i2c_get_clientdata(client); | |
287 | long val = simple_strtol(buf, NULL, 10); | |
288 | ||
289 | mutex_lock(&data->update_lock); | |
290 | data->temp_max[index] = TEMP_TO_REG(val); | |
291 | i2c_smbus_write_byte_data(client, ADM1025_REG_TEMP_HIGH(index), | |
292 | data->temp_max[index]); | |
293 | mutex_unlock(&data->update_lock); | |
294 | return count; | |
295 | } | |
296 | ||
1da177e4 | 297 | #define set_temp(offset) \ |
d8543e7f JD |
298 | static SENSOR_DEVICE_ATTR(temp##offset##_input, S_IRUGO, \ |
299 | show_temp, NULL, offset - 1); \ | |
300 | static SENSOR_DEVICE_ATTR(temp##offset##_min, S_IWUSR | S_IRUGO, \ | |
301 | show_temp_min, set_temp_min, offset - 1); \ | |
302 | static SENSOR_DEVICE_ATTR(temp##offset##_max, S_IWUSR | S_IRUGO, \ | |
303 | show_temp_max, set_temp_max, offset - 1) | |
1da177e4 LT |
304 | set_temp(1); |
305 | set_temp(2); | |
306 | ||
4e952799 JD |
307 | static ssize_t |
308 | show_alarms(struct device *dev, struct device_attribute *attr, char *buf) | |
1da177e4 LT |
309 | { |
310 | struct adm1025_data *data = adm1025_update_device(dev); | |
311 | return sprintf(buf, "%u\n", data->alarms); | |
312 | } | |
313 | static DEVICE_ATTR(alarms, S_IRUGO, show_alarms, NULL); | |
314 | ||
bb081300 JD |
315 | static ssize_t |
316 | show_alarm(struct device *dev, struct device_attribute *attr, char *buf) | |
317 | { | |
318 | int bitnr = to_sensor_dev_attr(attr)->index; | |
319 | struct adm1025_data *data = adm1025_update_device(dev); | |
320 | return sprintf(buf, "%u\n", (data->alarms >> bitnr) & 1); | |
321 | } | |
322 | static SENSOR_DEVICE_ATTR(in0_alarm, S_IRUGO, show_alarm, NULL, 0); | |
323 | static SENSOR_DEVICE_ATTR(in1_alarm, S_IRUGO, show_alarm, NULL, 1); | |
324 | static SENSOR_DEVICE_ATTR(in2_alarm, S_IRUGO, show_alarm, NULL, 2); | |
325 | static SENSOR_DEVICE_ATTR(in3_alarm, S_IRUGO, show_alarm, NULL, 3); | |
326 | static SENSOR_DEVICE_ATTR(in4_alarm, S_IRUGO, show_alarm, NULL, 8); | |
327 | static SENSOR_DEVICE_ATTR(in5_alarm, S_IRUGO, show_alarm, NULL, 9); | |
328 | static SENSOR_DEVICE_ATTR(temp1_alarm, S_IRUGO, show_alarm, NULL, 5); | |
329 | static SENSOR_DEVICE_ATTR(temp2_alarm, S_IRUGO, show_alarm, NULL, 4); | |
330 | static SENSOR_DEVICE_ATTR(temp1_fault, S_IRUGO, show_alarm, NULL, 14); | |
331 | ||
4e952799 JD |
332 | static ssize_t |
333 | show_vid(struct device *dev, struct device_attribute *attr, char *buf) | |
1da177e4 LT |
334 | { |
335 | struct adm1025_data *data = adm1025_update_device(dev); | |
336 | return sprintf(buf, "%u\n", vid_from_reg(data->vid, data->vrm)); | |
337 | } | |
937df8df | 338 | static DEVICE_ATTR(cpu0_vid, S_IRUGO, show_vid, NULL); |
1da177e4 | 339 | |
4e952799 JD |
340 | static ssize_t |
341 | show_vrm(struct device *dev, struct device_attribute *attr, char *buf) | |
1da177e4 | 342 | { |
90d6619a | 343 | struct adm1025_data *data = dev_get_drvdata(dev); |
1da177e4 LT |
344 | return sprintf(buf, "%u\n", data->vrm); |
345 | } | |
4e952799 JD |
346 | static ssize_t set_vrm(struct device *dev, struct device_attribute *attr, |
347 | const char *buf, size_t count) | |
1da177e4 | 348 | { |
8f74efe8 | 349 | struct adm1025_data *data = dev_get_drvdata(dev); |
1da177e4 LT |
350 | data->vrm = simple_strtoul(buf, NULL, 10); |
351 | return count; | |
352 | } | |
353 | static DEVICE_ATTR(vrm, S_IRUGO | S_IWUSR, show_vrm, set_vrm); | |
354 | ||
355 | /* | |
356 | * Real code | |
357 | */ | |
358 | ||
681c6f7a | 359 | static struct attribute *adm1025_attributes[] = { |
d8543e7f JD |
360 | &sensor_dev_attr_in0_input.dev_attr.attr, |
361 | &sensor_dev_attr_in1_input.dev_attr.attr, | |
362 | &sensor_dev_attr_in2_input.dev_attr.attr, | |
363 | &sensor_dev_attr_in3_input.dev_attr.attr, | |
364 | &sensor_dev_attr_in5_input.dev_attr.attr, | |
365 | &sensor_dev_attr_in0_min.dev_attr.attr, | |
366 | &sensor_dev_attr_in1_min.dev_attr.attr, | |
367 | &sensor_dev_attr_in2_min.dev_attr.attr, | |
368 | &sensor_dev_attr_in3_min.dev_attr.attr, | |
369 | &sensor_dev_attr_in5_min.dev_attr.attr, | |
370 | &sensor_dev_attr_in0_max.dev_attr.attr, | |
371 | &sensor_dev_attr_in1_max.dev_attr.attr, | |
372 | &sensor_dev_attr_in2_max.dev_attr.attr, | |
373 | &sensor_dev_attr_in3_max.dev_attr.attr, | |
374 | &sensor_dev_attr_in5_max.dev_attr.attr, | |
bb081300 JD |
375 | &sensor_dev_attr_in0_alarm.dev_attr.attr, |
376 | &sensor_dev_attr_in1_alarm.dev_attr.attr, | |
377 | &sensor_dev_attr_in2_alarm.dev_attr.attr, | |
378 | &sensor_dev_attr_in3_alarm.dev_attr.attr, | |
379 | &sensor_dev_attr_in5_alarm.dev_attr.attr, | |
d8543e7f JD |
380 | &sensor_dev_attr_temp1_input.dev_attr.attr, |
381 | &sensor_dev_attr_temp2_input.dev_attr.attr, | |
382 | &sensor_dev_attr_temp1_min.dev_attr.attr, | |
383 | &sensor_dev_attr_temp2_min.dev_attr.attr, | |
384 | &sensor_dev_attr_temp1_max.dev_attr.attr, | |
385 | &sensor_dev_attr_temp2_max.dev_attr.attr, | |
bb081300 JD |
386 | &sensor_dev_attr_temp1_alarm.dev_attr.attr, |
387 | &sensor_dev_attr_temp2_alarm.dev_attr.attr, | |
388 | &sensor_dev_attr_temp1_fault.dev_attr.attr, | |
681c6f7a MH |
389 | &dev_attr_alarms.attr, |
390 | &dev_attr_cpu0_vid.attr, | |
391 | &dev_attr_vrm.attr, | |
392 | NULL | |
393 | }; | |
394 | ||
395 | static const struct attribute_group adm1025_group = { | |
396 | .attrs = adm1025_attributes, | |
397 | }; | |
398 | ||
4e952799 | 399 | static struct attribute *adm1025_attributes_in4[] = { |
d8543e7f JD |
400 | &sensor_dev_attr_in4_input.dev_attr.attr, |
401 | &sensor_dev_attr_in4_min.dev_attr.attr, | |
402 | &sensor_dev_attr_in4_max.dev_attr.attr, | |
bb081300 | 403 | &sensor_dev_attr_in4_alarm.dev_attr.attr, |
681c6f7a MH |
404 | NULL |
405 | }; | |
406 | ||
4e952799 JD |
407 | static const struct attribute_group adm1025_group_in4 = { |
408 | .attrs = adm1025_attributes_in4, | |
681c6f7a MH |
409 | }; |
410 | ||
7dbafe02 JD |
411 | /* Return 0 if detection is successful, -ENODEV otherwise */ |
412 | static int adm1025_detect(struct i2c_client *client, int kind, | |
413 | struct i2c_board_info *info) | |
1da177e4 | 414 | { |
7dbafe02 | 415 | struct i2c_adapter *adapter = client->adapter; |
1da177e4 LT |
416 | const char *name = ""; |
417 | u8 config; | |
418 | ||
419 | if (!i2c_check_functionality(adapter, I2C_FUNC_SMBUS_BYTE_DATA)) | |
7dbafe02 | 420 | return -ENODEV; |
1da177e4 LT |
421 | |
422 | /* | |
423 | * Now we do the remaining detection. A negative kind means that | |
424 | * the driver was loaded with no force parameter (default), so we | |
425 | * must both detect and identify the chip. A zero kind means that | |
426 | * the driver was loaded with the force parameter, the detection | |
427 | * step shall be skipped. A positive kind means that the driver | |
428 | * was loaded with the force parameter and a given kind of chip is | |
429 | * requested, so both the detection and the identification steps | |
430 | * are skipped. | |
431 | */ | |
4e952799 | 432 | config = i2c_smbus_read_byte_data(client, ADM1025_REG_CONFIG); |
1da177e4 LT |
433 | if (kind < 0) { /* detection */ |
434 | if ((config & 0x80) != 0x00 | |
4e952799 | 435 | || (i2c_smbus_read_byte_data(client, |
1da177e4 | 436 | ADM1025_REG_STATUS1) & 0xC0) != 0x00 |
4e952799 | 437 | || (i2c_smbus_read_byte_data(client, |
1da177e4 LT |
438 | ADM1025_REG_STATUS2) & 0xBC) != 0x00) { |
439 | dev_dbg(&adapter->dev, | |
440 | "ADM1025 detection failed at 0x%02x.\n", | |
7dbafe02 JD |
441 | client->addr); |
442 | return -ENODEV; | |
1da177e4 LT |
443 | } |
444 | } | |
445 | ||
446 | if (kind <= 0) { /* identification */ | |
447 | u8 man_id, chip_id; | |
448 | ||
4e952799 JD |
449 | man_id = i2c_smbus_read_byte_data(client, ADM1025_REG_MAN_ID); |
450 | chip_id = i2c_smbus_read_byte_data(client, ADM1025_REG_CHIP_ID); | |
451 | ||
1da177e4 LT |
452 | if (man_id == 0x41) { /* Analog Devices */ |
453 | if ((chip_id & 0xF0) == 0x20) { /* ADM1025/ADM1025A */ | |
454 | kind = adm1025; | |
455 | } | |
456 | } else | |
457 | if (man_id == 0xA1) { /* Philips */ | |
7dbafe02 | 458 | if (client->addr != 0x2E |
1da177e4 LT |
459 | && (chip_id & 0xF0) == 0x20) { /* NE1619 */ |
460 | kind = ne1619; | |
461 | } | |
462 | } | |
463 | ||
464 | if (kind <= 0) { /* identification failed */ | |
465 | dev_info(&adapter->dev, | |
466 | "Unsupported chip (man_id=0x%02X, " | |
467 | "chip_id=0x%02X).\n", man_id, chip_id); | |
7dbafe02 | 468 | return -ENODEV; |
1da177e4 LT |
469 | } |
470 | } | |
471 | ||
472 | if (kind == adm1025) { | |
473 | name = "adm1025"; | |
474 | } else if (kind == ne1619) { | |
475 | name = "ne1619"; | |
476 | } | |
7dbafe02 | 477 | strlcpy(info->type, name, I2C_NAME_SIZE); |
1da177e4 | 478 | |
7dbafe02 JD |
479 | return 0; |
480 | } | |
1da177e4 | 481 | |
7dbafe02 JD |
482 | static int adm1025_probe(struct i2c_client *client, |
483 | const struct i2c_device_id *id) | |
484 | { | |
485 | struct adm1025_data *data; | |
486 | int err; | |
487 | u8 config; | |
488 | ||
489 | data = kzalloc(sizeof(struct adm1025_data), GFP_KERNEL); | |
490 | if (!data) { | |
491 | err = -ENOMEM; | |
492 | goto exit; | |
493 | } | |
494 | ||
495 | i2c_set_clientdata(client, data); | |
496 | mutex_init(&data->update_lock); | |
1da177e4 LT |
497 | |
498 | /* Initialize the ADM1025 chip */ | |
4e952799 | 499 | adm1025_init_client(client); |
1da177e4 LT |
500 | |
501 | /* Register sysfs hooks */ | |
4e952799 | 502 | if ((err = sysfs_create_group(&client->dev.kobj, &adm1025_group))) |
7dbafe02 | 503 | goto exit_free; |
1da177e4 LT |
504 | |
505 | /* Pin 11 is either in4 (+12V) or VID4 */ | |
7dbafe02 | 506 | config = i2c_smbus_read_byte_data(client, ADM1025_REG_CONFIG); |
1da177e4 | 507 | if (!(config & 0x20)) { |
4e952799 JD |
508 | if ((err = sysfs_create_group(&client->dev.kobj, |
509 | &adm1025_group_in4))) | |
681c6f7a MH |
510 | goto exit_remove; |
511 | } | |
512 | ||
4e952799 | 513 | data->hwmon_dev = hwmon_device_register(&client->dev); |
1beeffe4 TJ |
514 | if (IS_ERR(data->hwmon_dev)) { |
515 | err = PTR_ERR(data->hwmon_dev); | |
681c6f7a | 516 | goto exit_remove; |
1da177e4 LT |
517 | } |
518 | ||
519 | return 0; | |
520 | ||
681c6f7a | 521 | exit_remove: |
4e952799 JD |
522 | sysfs_remove_group(&client->dev.kobj, &adm1025_group); |
523 | sysfs_remove_group(&client->dev.kobj, &adm1025_group_in4); | |
1da177e4 LT |
524 | exit_free: |
525 | kfree(data); | |
526 | exit: | |
527 | return err; | |
528 | } | |
529 | ||
530 | static void adm1025_init_client(struct i2c_client *client) | |
531 | { | |
532 | u8 reg; | |
533 | struct adm1025_data *data = i2c_get_clientdata(client); | |
534 | int i; | |
535 | ||
303760b4 | 536 | data->vrm = vid_which_vrm(); |
1da177e4 LT |
537 | |
538 | /* | |
539 | * Set high limits | |
540 | * Usually we avoid setting limits on driver init, but it happens | |
541 | * that the ADM1025 comes with stupid default limits (all registers | |
542 | * set to 0). In case the chip has not gone through any limit | |
543 | * setting yet, we better set the high limits to the max so that | |
544 | * no alarm triggers. | |
545 | */ | |
546 | for (i=0; i<6; i++) { | |
547 | reg = i2c_smbus_read_byte_data(client, | |
548 | ADM1025_REG_IN_MAX(i)); | |
549 | if (reg == 0) | |
550 | i2c_smbus_write_byte_data(client, | |
551 | ADM1025_REG_IN_MAX(i), | |
552 | 0xFF); | |
553 | } | |
554 | for (i=0; i<2; i++) { | |
555 | reg = i2c_smbus_read_byte_data(client, | |
556 | ADM1025_REG_TEMP_HIGH(i)); | |
557 | if (reg == 0) | |
558 | i2c_smbus_write_byte_data(client, | |
559 | ADM1025_REG_TEMP_HIGH(i), | |
560 | 0x7F); | |
561 | } | |
562 | ||
563 | /* | |
564 | * Start the conversions | |
565 | */ | |
566 | reg = i2c_smbus_read_byte_data(client, ADM1025_REG_CONFIG); | |
567 | if (!(reg & 0x01)) | |
568 | i2c_smbus_write_byte_data(client, ADM1025_REG_CONFIG, | |
569 | (reg&0x7E)|0x01); | |
570 | } | |
571 | ||
7dbafe02 | 572 | static int adm1025_remove(struct i2c_client *client) |
1da177e4 | 573 | { |
943b0830 | 574 | struct adm1025_data *data = i2c_get_clientdata(client); |
1da177e4 | 575 | |
1beeffe4 | 576 | hwmon_device_unregister(data->hwmon_dev); |
681c6f7a | 577 | sysfs_remove_group(&client->dev.kobj, &adm1025_group); |
4e952799 | 578 | sysfs_remove_group(&client->dev.kobj, &adm1025_group_in4); |
943b0830 | 579 | |
943b0830 | 580 | kfree(data); |
1da177e4 LT |
581 | return 0; |
582 | } | |
583 | ||
584 | static struct adm1025_data *adm1025_update_device(struct device *dev) | |
585 | { | |
586 | struct i2c_client *client = to_i2c_client(dev); | |
587 | struct adm1025_data *data = i2c_get_clientdata(client); | |
588 | ||
9a61bf63 | 589 | mutex_lock(&data->update_lock); |
1da177e4 LT |
590 | |
591 | if (time_after(jiffies, data->last_updated + HZ * 2) || !data->valid) { | |
592 | int i; | |
593 | ||
594 | dev_dbg(&client->dev, "Updating data.\n"); | |
595 | for (i=0; i<6; i++) { | |
596 | data->in[i] = i2c_smbus_read_byte_data(client, | |
597 | ADM1025_REG_IN(i)); | |
598 | data->in_min[i] = i2c_smbus_read_byte_data(client, | |
599 | ADM1025_REG_IN_MIN(i)); | |
600 | data->in_max[i] = i2c_smbus_read_byte_data(client, | |
601 | ADM1025_REG_IN_MAX(i)); | |
602 | } | |
603 | for (i=0; i<2; i++) { | |
604 | data->temp[i] = i2c_smbus_read_byte_data(client, | |
605 | ADM1025_REG_TEMP(i)); | |
606 | data->temp_min[i] = i2c_smbus_read_byte_data(client, | |
607 | ADM1025_REG_TEMP_LOW(i)); | |
608 | data->temp_max[i] = i2c_smbus_read_byte_data(client, | |
609 | ADM1025_REG_TEMP_HIGH(i)); | |
610 | } | |
611 | data->alarms = i2c_smbus_read_byte_data(client, | |
612 | ADM1025_REG_STATUS1) | |
613 | | (i2c_smbus_read_byte_data(client, | |
614 | ADM1025_REG_STATUS2) << 8); | |
615 | data->vid = (i2c_smbus_read_byte_data(client, | |
616 | ADM1025_REG_VID) & 0x0f) | |
617 | | ((i2c_smbus_read_byte_data(client, | |
618 | ADM1025_REG_VID4) & 0x01) << 4); | |
619 | ||
620 | data->last_updated = jiffies; | |
621 | data->valid = 1; | |
622 | } | |
623 | ||
9a61bf63 | 624 | mutex_unlock(&data->update_lock); |
1da177e4 LT |
625 | |
626 | return data; | |
627 | } | |
628 | ||
629 | static int __init sensors_adm1025_init(void) | |
630 | { | |
631 | return i2c_add_driver(&adm1025_driver); | |
632 | } | |
633 | ||
634 | static void __exit sensors_adm1025_exit(void) | |
635 | { | |
636 | i2c_del_driver(&adm1025_driver); | |
637 | } | |
638 | ||
639 | MODULE_AUTHOR("Jean Delvare <khali@linux-fr.org>"); | |
640 | MODULE_DESCRIPTION("ADM1025 driver"); | |
641 | MODULE_LICENSE("GPL"); | |
642 | ||
643 | module_init(sensors_adm1025_init); | |
644 | module_exit(sensors_adm1025_exit); |