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1da177e4 LT |
1 | /* |
2 | * adm1025.c | |
3 | * | |
4 | * Copyright (C) 2000 Chen-Yuan Wu <gwu@esoft.com> | |
95606723 | 5 | * Copyright (C) 2003-2009 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: | |
2b22de51 | 15 | * http://www.onsemi.com/PowerSolutions/product.do?id=ADM1025 |
1da177e4 LT |
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 | 66 | |
e5e9f44c | 67 | enum chips { adm1025, ne1619 }; |
1da177e4 LT |
68 | |
69 | /* | |
70 | * The ADM1025 registers | |
71 | */ | |
72 | ||
73 | #define ADM1025_REG_MAN_ID 0x3E | |
4e952799 | 74 | #define ADM1025_REG_CHIP_ID 0x3F |
1da177e4 LT |
75 | #define ADM1025_REG_CONFIG 0x40 |
76 | #define ADM1025_REG_STATUS1 0x41 | |
77 | #define ADM1025_REG_STATUS2 0x42 | |
78 | #define ADM1025_REG_IN(nr) (0x20 + (nr)) | |
79 | #define ADM1025_REG_IN_MAX(nr) (0x2B + (nr) * 2) | |
80 | #define ADM1025_REG_IN_MIN(nr) (0x2C + (nr) * 2) | |
81 | #define ADM1025_REG_TEMP(nr) (0x26 + (nr)) | |
82 | #define ADM1025_REG_TEMP_HIGH(nr) (0x37 + (nr) * 2) | |
83 | #define ADM1025_REG_TEMP_LOW(nr) (0x38 + (nr) * 2) | |
84 | #define ADM1025_REG_VID 0x47 | |
85 | #define ADM1025_REG_VID4 0x49 | |
86 | ||
87 | /* | |
88 | * Conversions and various macros | |
89 | * The ADM1025 uses signed 8-bit values for temperatures. | |
90 | */ | |
91 | ||
4e952799 | 92 | static const int in_scale[6] = { 2500, 2250, 3300, 5000, 12000, 3300 }; |
1da177e4 | 93 | |
2b22de51 GR |
94 | #define IN_FROM_REG(reg, scale) (((reg) * (scale) + 96) / 192) |
95 | #define IN_TO_REG(val, scale) ((val) <= 0 ? 0 : \ | |
1da177e4 | 96 | (val) * 192 >= (scale) * 255 ? 255 : \ |
2b22de51 | 97 | ((val) * 192 + (scale) / 2) / (scale)) |
1da177e4 LT |
98 | |
99 | #define TEMP_FROM_REG(reg) ((reg) * 1000) | |
100 | #define TEMP_TO_REG(val) ((val) <= -127500 ? -128 : \ | |
101 | (val) >= 126500 ? 127 : \ | |
2b22de51 GR |
102 | (((val) < 0 ? (val) - 500 : \ |
103 | (val) + 500) / 1000)) | |
1da177e4 LT |
104 | |
105 | /* | |
106 | * Functions declaration | |
107 | */ | |
108 | ||
7dbafe02 JD |
109 | static int adm1025_probe(struct i2c_client *client, |
110 | const struct i2c_device_id *id); | |
310ec792 | 111 | static int adm1025_detect(struct i2c_client *client, |
7dbafe02 | 112 | struct i2c_board_info *info); |
1da177e4 | 113 | static void adm1025_init_client(struct i2c_client *client); |
7dbafe02 | 114 | static int adm1025_remove(struct i2c_client *client); |
1da177e4 LT |
115 | static struct adm1025_data *adm1025_update_device(struct device *dev); |
116 | ||
117 | /* | |
118 | * Driver data (common to all clients) | |
119 | */ | |
120 | ||
7dbafe02 JD |
121 | static const struct i2c_device_id adm1025_id[] = { |
122 | { "adm1025", adm1025 }, | |
123 | { "ne1619", ne1619 }, | |
124 | { } | |
125 | }; | |
126 | MODULE_DEVICE_TABLE(i2c, adm1025_id); | |
127 | ||
1da177e4 | 128 | static struct i2c_driver adm1025_driver = { |
7dbafe02 | 129 | .class = I2C_CLASS_HWMON, |
cdaf7934 | 130 | .driver = { |
cdaf7934 LR |
131 | .name = "adm1025", |
132 | }, | |
7dbafe02 JD |
133 | .probe = adm1025_probe, |
134 | .remove = adm1025_remove, | |
135 | .id_table = adm1025_id, | |
136 | .detect = adm1025_detect, | |
c3813d6a | 137 | .address_list = normal_i2c, |
1da177e4 LT |
138 | }; |
139 | ||
140 | /* | |
141 | * Client data (each client gets its own) | |
142 | */ | |
143 | ||
144 | struct adm1025_data { | |
1beeffe4 | 145 | struct device *hwmon_dev; |
9a61bf63 | 146 | struct mutex update_lock; |
1da177e4 LT |
147 | char valid; /* zero until following fields are valid */ |
148 | unsigned long last_updated; /* in jiffies */ | |
149 | ||
150 | u8 in[6]; /* register value */ | |
151 | u8 in_max[6]; /* register value */ | |
152 | u8 in_min[6]; /* register value */ | |
153 | s8 temp[2]; /* register value */ | |
154 | s8 temp_min[2]; /* register value */ | |
155 | s8 temp_max[2]; /* register value */ | |
156 | u16 alarms; /* register values, combined */ | |
157 | u8 vid; /* register values, combined */ | |
158 | u8 vrm; | |
159 | }; | |
160 | ||
161 | /* | |
162 | * Sysfs stuff | |
163 | */ | |
164 | ||
d8543e7f JD |
165 | static ssize_t |
166 | show_in(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[index], | |
171 | in_scale[index])); | |
172 | } | |
173 | ||
174 | static ssize_t | |
175 | show_in_min(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_min[index], | |
180 | in_scale[index])); | |
181 | } | |
182 | ||
183 | static ssize_t | |
184 | show_in_max(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, "%u\n", IN_FROM_REG(data->in_max[index], | |
189 | in_scale[index])); | |
190 | } | |
191 | ||
192 | static ssize_t | |
193 | show_temp(struct device *dev, struct device_attribute *attr, char *buf) | |
194 | { | |
195 | int index = to_sensor_dev_attr(attr)->index; | |
196 | struct adm1025_data *data = adm1025_update_device(dev); | |
197 | return sprintf(buf, "%d\n", TEMP_FROM_REG(data->temp[index])); | |
198 | } | |
199 | ||
200 | static ssize_t | |
201 | show_temp_min(struct device *dev, struct device_attribute *attr, char *buf) | |
202 | { | |
203 | int index = to_sensor_dev_attr(attr)->index; | |
204 | struct adm1025_data *data = adm1025_update_device(dev); | |
205 | return sprintf(buf, "%d\n", TEMP_FROM_REG(data->temp_min[index])); | |
206 | } | |
207 | ||
208 | static ssize_t | |
209 | show_temp_max(struct device *dev, struct device_attribute *attr, char *buf) | |
210 | { | |
211 | int index = to_sensor_dev_attr(attr)->index; | |
212 | struct adm1025_data *data = adm1025_update_device(dev); | |
213 | return sprintf(buf, "%d\n", TEMP_FROM_REG(data->temp_max[index])); | |
214 | } | |
215 | ||
216 | static ssize_t set_in_min(struct device *dev, struct device_attribute *attr, | |
217 | const char *buf, size_t count) | |
218 | { | |
219 | int index = to_sensor_dev_attr(attr)->index; | |
220 | struct i2c_client *client = to_i2c_client(dev); | |
221 | struct adm1025_data *data = i2c_get_clientdata(client); | |
2b22de51 GR |
222 | long val; |
223 | int err; | |
224 | ||
225 | err = kstrtol(buf, 10, &val); | |
226 | if (err) | |
227 | return err; | |
d8543e7f JD |
228 | |
229 | mutex_lock(&data->update_lock); | |
230 | data->in_min[index] = IN_TO_REG(val, in_scale[index]); | |
231 | i2c_smbus_write_byte_data(client, ADM1025_REG_IN_MIN(index), | |
232 | data->in_min[index]); | |
233 | mutex_unlock(&data->update_lock); | |
234 | return count; | |
235 | } | |
236 | ||
237 | static ssize_t set_in_max(struct device *dev, struct device_attribute *attr, | |
238 | const char *buf, size_t count) | |
239 | { | |
240 | int index = to_sensor_dev_attr(attr)->index; | |
241 | struct i2c_client *client = to_i2c_client(dev); | |
242 | struct adm1025_data *data = i2c_get_clientdata(client); | |
2b22de51 GR |
243 | long val; |
244 | int err; | |
245 | ||
246 | err = kstrtol(buf, 10, &val); | |
247 | if (err) | |
248 | return err; | |
d8543e7f JD |
249 | |
250 | mutex_lock(&data->update_lock); | |
251 | data->in_max[index] = IN_TO_REG(val, in_scale[index]); | |
252 | i2c_smbus_write_byte_data(client, ADM1025_REG_IN_MAX(index), | |
253 | data->in_max[index]); | |
254 | mutex_unlock(&data->update_lock); | |
255 | return count; | |
256 | } | |
1da177e4 LT |
257 | |
258 | #define set_in(offset) \ | |
d8543e7f JD |
259 | static SENSOR_DEVICE_ATTR(in##offset##_input, S_IRUGO, \ |
260 | show_in, NULL, offset); \ | |
261 | static SENSOR_DEVICE_ATTR(in##offset##_min, S_IWUSR | S_IRUGO, \ | |
262 | show_in_min, set_in_min, offset); \ | |
263 | static SENSOR_DEVICE_ATTR(in##offset##_max, S_IWUSR | S_IRUGO, \ | |
264 | show_in_max, set_in_max, offset) | |
1da177e4 LT |
265 | set_in(0); |
266 | set_in(1); | |
267 | set_in(2); | |
268 | set_in(3); | |
269 | set_in(4); | |
270 | set_in(5); | |
271 | ||
d8543e7f JD |
272 | static ssize_t set_temp_min(struct device *dev, struct device_attribute *attr, |
273 | const char *buf, size_t count) | |
274 | { | |
275 | int index = to_sensor_dev_attr(attr)->index; | |
276 | struct i2c_client *client = to_i2c_client(dev); | |
277 | struct adm1025_data *data = i2c_get_clientdata(client); | |
2b22de51 GR |
278 | long val; |
279 | int err; | |
280 | ||
281 | err = kstrtol(buf, 10, &val); | |
282 | if (err) | |
283 | return err; | |
d8543e7f JD |
284 | |
285 | mutex_lock(&data->update_lock); | |
286 | data->temp_min[index] = TEMP_TO_REG(val); | |
287 | i2c_smbus_write_byte_data(client, ADM1025_REG_TEMP_LOW(index), | |
288 | data->temp_min[index]); | |
289 | mutex_unlock(&data->update_lock); | |
290 | return count; | |
291 | } | |
292 | ||
293 | static ssize_t set_temp_max(struct device *dev, struct device_attribute *attr, | |
294 | const char *buf, size_t count) | |
295 | { | |
296 | int index = to_sensor_dev_attr(attr)->index; | |
297 | struct i2c_client *client = to_i2c_client(dev); | |
298 | struct adm1025_data *data = i2c_get_clientdata(client); | |
2b22de51 GR |
299 | long val; |
300 | int err; | |
301 | ||
302 | err = kstrtol(buf, 10, &val); | |
303 | if (err) | |
304 | return err; | |
d8543e7f JD |
305 | |
306 | mutex_lock(&data->update_lock); | |
307 | data->temp_max[index] = TEMP_TO_REG(val); | |
308 | i2c_smbus_write_byte_data(client, ADM1025_REG_TEMP_HIGH(index), | |
309 | data->temp_max[index]); | |
310 | mutex_unlock(&data->update_lock); | |
311 | return count; | |
312 | } | |
313 | ||
1da177e4 | 314 | #define set_temp(offset) \ |
d8543e7f JD |
315 | static SENSOR_DEVICE_ATTR(temp##offset##_input, S_IRUGO, \ |
316 | show_temp, NULL, offset - 1); \ | |
317 | static SENSOR_DEVICE_ATTR(temp##offset##_min, S_IWUSR | S_IRUGO, \ | |
318 | show_temp_min, set_temp_min, offset - 1); \ | |
319 | static SENSOR_DEVICE_ATTR(temp##offset##_max, S_IWUSR | S_IRUGO, \ | |
320 | show_temp_max, set_temp_max, offset - 1) | |
1da177e4 LT |
321 | set_temp(1); |
322 | set_temp(2); | |
323 | ||
4e952799 JD |
324 | static ssize_t |
325 | show_alarms(struct device *dev, struct device_attribute *attr, char *buf) | |
1da177e4 LT |
326 | { |
327 | struct adm1025_data *data = adm1025_update_device(dev); | |
328 | return sprintf(buf, "%u\n", data->alarms); | |
329 | } | |
330 | static DEVICE_ATTR(alarms, S_IRUGO, show_alarms, NULL); | |
331 | ||
bb081300 JD |
332 | static ssize_t |
333 | show_alarm(struct device *dev, struct device_attribute *attr, char *buf) | |
334 | { | |
335 | int bitnr = to_sensor_dev_attr(attr)->index; | |
336 | struct adm1025_data *data = adm1025_update_device(dev); | |
337 | return sprintf(buf, "%u\n", (data->alarms >> bitnr) & 1); | |
338 | } | |
339 | static SENSOR_DEVICE_ATTR(in0_alarm, S_IRUGO, show_alarm, NULL, 0); | |
340 | static SENSOR_DEVICE_ATTR(in1_alarm, S_IRUGO, show_alarm, NULL, 1); | |
341 | static SENSOR_DEVICE_ATTR(in2_alarm, S_IRUGO, show_alarm, NULL, 2); | |
342 | static SENSOR_DEVICE_ATTR(in3_alarm, S_IRUGO, show_alarm, NULL, 3); | |
343 | static SENSOR_DEVICE_ATTR(in4_alarm, S_IRUGO, show_alarm, NULL, 8); | |
344 | static SENSOR_DEVICE_ATTR(in5_alarm, S_IRUGO, show_alarm, NULL, 9); | |
345 | static SENSOR_DEVICE_ATTR(temp1_alarm, S_IRUGO, show_alarm, NULL, 5); | |
346 | static SENSOR_DEVICE_ATTR(temp2_alarm, S_IRUGO, show_alarm, NULL, 4); | |
347 | static SENSOR_DEVICE_ATTR(temp1_fault, S_IRUGO, show_alarm, NULL, 14); | |
348 | ||
4e952799 JD |
349 | static ssize_t |
350 | show_vid(struct device *dev, struct device_attribute *attr, char *buf) | |
1da177e4 LT |
351 | { |
352 | struct adm1025_data *data = adm1025_update_device(dev); | |
353 | return sprintf(buf, "%u\n", vid_from_reg(data->vid, data->vrm)); | |
354 | } | |
937df8df | 355 | static DEVICE_ATTR(cpu0_vid, S_IRUGO, show_vid, NULL); |
1da177e4 | 356 | |
4e952799 JD |
357 | static ssize_t |
358 | show_vrm(struct device *dev, struct device_attribute *attr, char *buf) | |
1da177e4 | 359 | { |
90d6619a | 360 | struct adm1025_data *data = dev_get_drvdata(dev); |
1da177e4 LT |
361 | return sprintf(buf, "%u\n", data->vrm); |
362 | } | |
4e952799 JD |
363 | static ssize_t set_vrm(struct device *dev, struct device_attribute *attr, |
364 | const char *buf, size_t count) | |
1da177e4 | 365 | { |
8f74efe8 | 366 | struct adm1025_data *data = dev_get_drvdata(dev); |
2b22de51 GR |
367 | unsigned long val; |
368 | int err; | |
369 | ||
370 | err = kstrtoul(buf, 10, &val); | |
371 | if (err) | |
372 | return err; | |
373 | ||
374 | data->vrm = val; | |
1da177e4 LT |
375 | return count; |
376 | } | |
377 | static DEVICE_ATTR(vrm, S_IRUGO | S_IWUSR, show_vrm, set_vrm); | |
378 | ||
379 | /* | |
380 | * Real code | |
381 | */ | |
382 | ||
681c6f7a | 383 | static struct attribute *adm1025_attributes[] = { |
d8543e7f JD |
384 | &sensor_dev_attr_in0_input.dev_attr.attr, |
385 | &sensor_dev_attr_in1_input.dev_attr.attr, | |
386 | &sensor_dev_attr_in2_input.dev_attr.attr, | |
387 | &sensor_dev_attr_in3_input.dev_attr.attr, | |
388 | &sensor_dev_attr_in5_input.dev_attr.attr, | |
389 | &sensor_dev_attr_in0_min.dev_attr.attr, | |
390 | &sensor_dev_attr_in1_min.dev_attr.attr, | |
391 | &sensor_dev_attr_in2_min.dev_attr.attr, | |
392 | &sensor_dev_attr_in3_min.dev_attr.attr, | |
393 | &sensor_dev_attr_in5_min.dev_attr.attr, | |
394 | &sensor_dev_attr_in0_max.dev_attr.attr, | |
395 | &sensor_dev_attr_in1_max.dev_attr.attr, | |
396 | &sensor_dev_attr_in2_max.dev_attr.attr, | |
397 | &sensor_dev_attr_in3_max.dev_attr.attr, | |
398 | &sensor_dev_attr_in5_max.dev_attr.attr, | |
bb081300 JD |
399 | &sensor_dev_attr_in0_alarm.dev_attr.attr, |
400 | &sensor_dev_attr_in1_alarm.dev_attr.attr, | |
401 | &sensor_dev_attr_in2_alarm.dev_attr.attr, | |
402 | &sensor_dev_attr_in3_alarm.dev_attr.attr, | |
403 | &sensor_dev_attr_in5_alarm.dev_attr.attr, | |
d8543e7f JD |
404 | &sensor_dev_attr_temp1_input.dev_attr.attr, |
405 | &sensor_dev_attr_temp2_input.dev_attr.attr, | |
406 | &sensor_dev_attr_temp1_min.dev_attr.attr, | |
407 | &sensor_dev_attr_temp2_min.dev_attr.attr, | |
408 | &sensor_dev_attr_temp1_max.dev_attr.attr, | |
409 | &sensor_dev_attr_temp2_max.dev_attr.attr, | |
bb081300 JD |
410 | &sensor_dev_attr_temp1_alarm.dev_attr.attr, |
411 | &sensor_dev_attr_temp2_alarm.dev_attr.attr, | |
412 | &sensor_dev_attr_temp1_fault.dev_attr.attr, | |
681c6f7a MH |
413 | &dev_attr_alarms.attr, |
414 | &dev_attr_cpu0_vid.attr, | |
415 | &dev_attr_vrm.attr, | |
416 | NULL | |
417 | }; | |
418 | ||
419 | static const struct attribute_group adm1025_group = { | |
420 | .attrs = adm1025_attributes, | |
421 | }; | |
422 | ||
4e952799 | 423 | static struct attribute *adm1025_attributes_in4[] = { |
d8543e7f JD |
424 | &sensor_dev_attr_in4_input.dev_attr.attr, |
425 | &sensor_dev_attr_in4_min.dev_attr.attr, | |
426 | &sensor_dev_attr_in4_max.dev_attr.attr, | |
bb081300 | 427 | &sensor_dev_attr_in4_alarm.dev_attr.attr, |
681c6f7a MH |
428 | NULL |
429 | }; | |
430 | ||
4e952799 JD |
431 | static const struct attribute_group adm1025_group_in4 = { |
432 | .attrs = adm1025_attributes_in4, | |
681c6f7a MH |
433 | }; |
434 | ||
7dbafe02 | 435 | /* Return 0 if detection is successful, -ENODEV otherwise */ |
310ec792 | 436 | static int adm1025_detect(struct i2c_client *client, |
7dbafe02 | 437 | struct i2c_board_info *info) |
1da177e4 | 438 | { |
7dbafe02 | 439 | struct i2c_adapter *adapter = client->adapter; |
95606723 JD |
440 | const char *name; |
441 | u8 man_id, chip_id; | |
1da177e4 LT |
442 | |
443 | if (!i2c_check_functionality(adapter, I2C_FUNC_SMBUS_BYTE_DATA)) | |
7dbafe02 | 444 | return -ENODEV; |
1da177e4 | 445 | |
95606723 JD |
446 | /* Check for unused bits */ |
447 | if ((i2c_smbus_read_byte_data(client, ADM1025_REG_CONFIG) & 0x80) | |
448 | || (i2c_smbus_read_byte_data(client, ADM1025_REG_STATUS1) & 0xC0) | |
449 | || (i2c_smbus_read_byte_data(client, ADM1025_REG_STATUS2) & 0xBC)) { | |
450 | dev_dbg(&adapter->dev, "ADM1025 detection failed at 0x%02x\n", | |
451 | client->addr); | |
452 | return -ENODEV; | |
1da177e4 LT |
453 | } |
454 | ||
95606723 JD |
455 | /* Identification */ |
456 | chip_id = i2c_smbus_read_byte_data(client, ADM1025_REG_CHIP_ID); | |
457 | if ((chip_id & 0xF0) != 0x20) | |
458 | return -ENODEV; | |
1da177e4 | 459 | |
95606723 JD |
460 | man_id = i2c_smbus_read_byte_data(client, ADM1025_REG_MAN_ID); |
461 | if (man_id == 0x41) | |
1da177e4 | 462 | name = "adm1025"; |
95606723 | 463 | else if (man_id == 0xA1 && client->addr != 0x2E) |
1da177e4 | 464 | name = "ne1619"; |
95606723 JD |
465 | else |
466 | return -ENODEV; | |
467 | ||
7dbafe02 | 468 | strlcpy(info->type, name, I2C_NAME_SIZE); |
1da177e4 | 469 | |
7dbafe02 JD |
470 | return 0; |
471 | } | |
1da177e4 | 472 | |
7dbafe02 JD |
473 | static int adm1025_probe(struct i2c_client *client, |
474 | const struct i2c_device_id *id) | |
475 | { | |
476 | struct adm1025_data *data; | |
477 | int err; | |
478 | u8 config; | |
479 | ||
6702c998 GR |
480 | data = devm_kzalloc(&client->dev, sizeof(struct adm1025_data), |
481 | GFP_KERNEL); | |
482 | if (!data) | |
483 | return -ENOMEM; | |
7dbafe02 JD |
484 | |
485 | i2c_set_clientdata(client, data); | |
486 | mutex_init(&data->update_lock); | |
1da177e4 LT |
487 | |
488 | /* Initialize the ADM1025 chip */ | |
4e952799 | 489 | adm1025_init_client(client); |
1da177e4 LT |
490 | |
491 | /* Register sysfs hooks */ | |
2b22de51 GR |
492 | err = sysfs_create_group(&client->dev.kobj, &adm1025_group); |
493 | if (err) | |
6702c998 | 494 | return err; |
1da177e4 LT |
495 | |
496 | /* Pin 11 is either in4 (+12V) or VID4 */ | |
7dbafe02 | 497 | config = i2c_smbus_read_byte_data(client, ADM1025_REG_CONFIG); |
1da177e4 | 498 | if (!(config & 0x20)) { |
2b22de51 GR |
499 | err = sysfs_create_group(&client->dev.kobj, &adm1025_group_in4); |
500 | if (err) | |
681c6f7a MH |
501 | goto exit_remove; |
502 | } | |
503 | ||
4e952799 | 504 | data->hwmon_dev = hwmon_device_register(&client->dev); |
1beeffe4 TJ |
505 | if (IS_ERR(data->hwmon_dev)) { |
506 | err = PTR_ERR(data->hwmon_dev); | |
681c6f7a | 507 | goto exit_remove; |
1da177e4 LT |
508 | } |
509 | ||
510 | return 0; | |
511 | ||
681c6f7a | 512 | exit_remove: |
4e952799 JD |
513 | sysfs_remove_group(&client->dev.kobj, &adm1025_group); |
514 | sysfs_remove_group(&client->dev.kobj, &adm1025_group_in4); | |
1da177e4 LT |
515 | return err; |
516 | } | |
517 | ||
518 | static void adm1025_init_client(struct i2c_client *client) | |
519 | { | |
520 | u8 reg; | |
521 | struct adm1025_data *data = i2c_get_clientdata(client); | |
522 | int i; | |
523 | ||
303760b4 | 524 | data->vrm = vid_which_vrm(); |
1da177e4 LT |
525 | |
526 | /* | |
527 | * Set high limits | |
528 | * Usually we avoid setting limits on driver init, but it happens | |
529 | * that the ADM1025 comes with stupid default limits (all registers | |
530 | * set to 0). In case the chip has not gone through any limit | |
531 | * setting yet, we better set the high limits to the max so that | |
532 | * no alarm triggers. | |
533 | */ | |
2b22de51 | 534 | for (i = 0; i < 6; i++) { |
1da177e4 LT |
535 | reg = i2c_smbus_read_byte_data(client, |
536 | ADM1025_REG_IN_MAX(i)); | |
537 | if (reg == 0) | |
538 | i2c_smbus_write_byte_data(client, | |
539 | ADM1025_REG_IN_MAX(i), | |
540 | 0xFF); | |
541 | } | |
2b22de51 | 542 | for (i = 0; i < 2; i++) { |
1da177e4 LT |
543 | reg = i2c_smbus_read_byte_data(client, |
544 | ADM1025_REG_TEMP_HIGH(i)); | |
545 | if (reg == 0) | |
546 | i2c_smbus_write_byte_data(client, | |
547 | ADM1025_REG_TEMP_HIGH(i), | |
548 | 0x7F); | |
549 | } | |
550 | ||
551 | /* | |
552 | * Start the conversions | |
553 | */ | |
554 | reg = i2c_smbus_read_byte_data(client, ADM1025_REG_CONFIG); | |
555 | if (!(reg & 0x01)) | |
556 | i2c_smbus_write_byte_data(client, ADM1025_REG_CONFIG, | |
557 | (reg&0x7E)|0x01); | |
558 | } | |
559 | ||
7dbafe02 | 560 | static int adm1025_remove(struct i2c_client *client) |
1da177e4 | 561 | { |
943b0830 | 562 | struct adm1025_data *data = i2c_get_clientdata(client); |
1da177e4 | 563 | |
1beeffe4 | 564 | hwmon_device_unregister(data->hwmon_dev); |
681c6f7a | 565 | sysfs_remove_group(&client->dev.kobj, &adm1025_group); |
4e952799 | 566 | sysfs_remove_group(&client->dev.kobj, &adm1025_group_in4); |
943b0830 | 567 | |
1da177e4 LT |
568 | return 0; |
569 | } | |
570 | ||
571 | static struct adm1025_data *adm1025_update_device(struct device *dev) | |
572 | { | |
573 | struct i2c_client *client = to_i2c_client(dev); | |
574 | struct adm1025_data *data = i2c_get_clientdata(client); | |
575 | ||
9a61bf63 | 576 | mutex_lock(&data->update_lock); |
1da177e4 LT |
577 | |
578 | if (time_after(jiffies, data->last_updated + HZ * 2) || !data->valid) { | |
579 | int i; | |
580 | ||
581 | dev_dbg(&client->dev, "Updating data.\n"); | |
2b22de51 | 582 | for (i = 0; i < 6; i++) { |
1da177e4 LT |
583 | data->in[i] = i2c_smbus_read_byte_data(client, |
584 | ADM1025_REG_IN(i)); | |
585 | data->in_min[i] = i2c_smbus_read_byte_data(client, | |
586 | ADM1025_REG_IN_MIN(i)); | |
587 | data->in_max[i] = i2c_smbus_read_byte_data(client, | |
588 | ADM1025_REG_IN_MAX(i)); | |
589 | } | |
2b22de51 | 590 | for (i = 0; i < 2; i++) { |
1da177e4 LT |
591 | data->temp[i] = i2c_smbus_read_byte_data(client, |
592 | ADM1025_REG_TEMP(i)); | |
593 | data->temp_min[i] = i2c_smbus_read_byte_data(client, | |
594 | ADM1025_REG_TEMP_LOW(i)); | |
595 | data->temp_max[i] = i2c_smbus_read_byte_data(client, | |
596 | ADM1025_REG_TEMP_HIGH(i)); | |
597 | } | |
598 | data->alarms = i2c_smbus_read_byte_data(client, | |
599 | ADM1025_REG_STATUS1) | |
600 | | (i2c_smbus_read_byte_data(client, | |
601 | ADM1025_REG_STATUS2) << 8); | |
602 | data->vid = (i2c_smbus_read_byte_data(client, | |
603 | ADM1025_REG_VID) & 0x0f) | |
604 | | ((i2c_smbus_read_byte_data(client, | |
605 | ADM1025_REG_VID4) & 0x01) << 4); | |
606 | ||
607 | data->last_updated = jiffies; | |
608 | data->valid = 1; | |
609 | } | |
610 | ||
9a61bf63 | 611 | mutex_unlock(&data->update_lock); |
1da177e4 LT |
612 | |
613 | return data; | |
614 | } | |
615 | ||
f0967eea | 616 | module_i2c_driver(adm1025_driver); |
1da177e4 LT |
617 | |
618 | MODULE_AUTHOR("Jean Delvare <khali@linux-fr.org>"); | |
619 | MODULE_DESCRIPTION("ADM1025 driver"); | |
620 | MODULE_LICENSE("GPL"); |