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1da177e4 LT |
1 | /* |
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 | ||
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 | ||
65 | static 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 | |
78 | #define ADM1025_REG_CHIP_ID 0x3F | |
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 | ||
96 | static int in_scale[6] = { 2500, 2250, 3300, 5000, 12000, 3300 }; | |
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 | ||
112 | static int adm1025_attach_adapter(struct i2c_adapter *adapter); | |
113 | static int adm1025_detect(struct i2c_adapter *adapter, int address, int kind); | |
114 | static void adm1025_init_client(struct i2c_client *client); | |
115 | static int adm1025_detach_client(struct i2c_client *client); | |
116 | static struct adm1025_data *adm1025_update_device(struct device *dev); | |
117 | ||
118 | /* | |
119 | * Driver data (common to all clients) | |
120 | */ | |
121 | ||
122 | static struct i2c_driver adm1025_driver = { | |
cdaf7934 | 123 | .driver = { |
cdaf7934 LR |
124 | .name = "adm1025", |
125 | }, | |
1da177e4 | 126 | .id = I2C_DRIVERID_ADM1025, |
1da177e4 LT |
127 | .attach_adapter = adm1025_attach_adapter, |
128 | .detach_client = adm1025_detach_client, | |
129 | }; | |
130 | ||
131 | /* | |
132 | * Client data (each client gets its own) | |
133 | */ | |
134 | ||
135 | struct adm1025_data { | |
136 | struct i2c_client client; | |
1beeffe4 | 137 | struct device *hwmon_dev; |
9a61bf63 | 138 | struct mutex update_lock; |
1da177e4 LT |
139 | char valid; /* zero until following fields are valid */ |
140 | unsigned long last_updated; /* in jiffies */ | |
141 | ||
142 | u8 in[6]; /* register value */ | |
143 | u8 in_max[6]; /* register value */ | |
144 | u8 in_min[6]; /* register value */ | |
145 | s8 temp[2]; /* register value */ | |
146 | s8 temp_min[2]; /* register value */ | |
147 | s8 temp_max[2]; /* register value */ | |
148 | u16 alarms; /* register values, combined */ | |
149 | u8 vid; /* register values, combined */ | |
150 | u8 vrm; | |
151 | }; | |
152 | ||
153 | /* | |
154 | * Sysfs stuff | |
155 | */ | |
156 | ||
d8543e7f JD |
157 | static ssize_t |
158 | show_in(struct device *dev, struct device_attribute *attr, char *buf) | |
159 | { | |
160 | int index = to_sensor_dev_attr(attr)->index; | |
161 | struct adm1025_data *data = adm1025_update_device(dev); | |
162 | return sprintf(buf, "%u\n", IN_FROM_REG(data->in[index], | |
163 | in_scale[index])); | |
164 | } | |
165 | ||
166 | static ssize_t | |
167 | show_in_min(struct device *dev, struct device_attribute *attr, char *buf) | |
168 | { | |
169 | int index = to_sensor_dev_attr(attr)->index; | |
170 | struct adm1025_data *data = adm1025_update_device(dev); | |
171 | return sprintf(buf, "%u\n", IN_FROM_REG(data->in_min[index], | |
172 | in_scale[index])); | |
173 | } | |
174 | ||
175 | static ssize_t | |
176 | show_in_max(struct device *dev, struct device_attribute *attr, char *buf) | |
177 | { | |
178 | int index = to_sensor_dev_attr(attr)->index; | |
179 | struct adm1025_data *data = adm1025_update_device(dev); | |
180 | return sprintf(buf, "%u\n", IN_FROM_REG(data->in_max[index], | |
181 | in_scale[index])); | |
182 | } | |
183 | ||
184 | static ssize_t | |
185 | show_temp(struct device *dev, struct device_attribute *attr, char *buf) | |
186 | { | |
187 | int index = to_sensor_dev_attr(attr)->index; | |
188 | struct adm1025_data *data = adm1025_update_device(dev); | |
189 | return sprintf(buf, "%d\n", TEMP_FROM_REG(data->temp[index])); | |
190 | } | |
191 | ||
192 | static ssize_t | |
193 | show_temp_min(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_min[index])); | |
198 | } | |
199 | ||
200 | static ssize_t | |
201 | show_temp_max(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_max[index])); | |
206 | } | |
207 | ||
208 | static ssize_t set_in_min(struct device *dev, struct device_attribute *attr, | |
209 | const char *buf, size_t count) | |
210 | { | |
211 | int index = to_sensor_dev_attr(attr)->index; | |
212 | struct i2c_client *client = to_i2c_client(dev); | |
213 | struct adm1025_data *data = i2c_get_clientdata(client); | |
214 | long val = simple_strtol(buf, NULL, 10); | |
215 | ||
216 | mutex_lock(&data->update_lock); | |
217 | data->in_min[index] = IN_TO_REG(val, in_scale[index]); | |
218 | i2c_smbus_write_byte_data(client, ADM1025_REG_IN_MIN(index), | |
219 | data->in_min[index]); | |
220 | mutex_unlock(&data->update_lock); | |
221 | return count; | |
222 | } | |
223 | ||
224 | static ssize_t set_in_max(struct device *dev, struct device_attribute *attr, | |
225 | const char *buf, size_t count) | |
226 | { | |
227 | int index = to_sensor_dev_attr(attr)->index; | |
228 | struct i2c_client *client = to_i2c_client(dev); | |
229 | struct adm1025_data *data = i2c_get_clientdata(client); | |
230 | long val = simple_strtol(buf, NULL, 10); | |
231 | ||
232 | mutex_lock(&data->update_lock); | |
233 | data->in_max[index] = IN_TO_REG(val, in_scale[index]); | |
234 | i2c_smbus_write_byte_data(client, ADM1025_REG_IN_MAX(index), | |
235 | data->in_max[index]); | |
236 | mutex_unlock(&data->update_lock); | |
237 | return count; | |
238 | } | |
1da177e4 LT |
239 | |
240 | #define set_in(offset) \ | |
d8543e7f JD |
241 | static SENSOR_DEVICE_ATTR(in##offset##_input, S_IRUGO, \ |
242 | show_in, NULL, offset); \ | |
243 | static SENSOR_DEVICE_ATTR(in##offset##_min, S_IWUSR | S_IRUGO, \ | |
244 | show_in_min, set_in_min, offset); \ | |
245 | static SENSOR_DEVICE_ATTR(in##offset##_max, S_IWUSR | S_IRUGO, \ | |
246 | show_in_max, set_in_max, offset) | |
1da177e4 LT |
247 | set_in(0); |
248 | set_in(1); | |
249 | set_in(2); | |
250 | set_in(3); | |
251 | set_in(4); | |
252 | set_in(5); | |
253 | ||
d8543e7f JD |
254 | static ssize_t set_temp_min(struct device *dev, struct device_attribute *attr, |
255 | const char *buf, size_t count) | |
256 | { | |
257 | int index = to_sensor_dev_attr(attr)->index; | |
258 | struct i2c_client *client = to_i2c_client(dev); | |
259 | struct adm1025_data *data = i2c_get_clientdata(client); | |
260 | long val = simple_strtol(buf, NULL, 10); | |
261 | ||
262 | mutex_lock(&data->update_lock); | |
263 | data->temp_min[index] = TEMP_TO_REG(val); | |
264 | i2c_smbus_write_byte_data(client, ADM1025_REG_TEMP_LOW(index), | |
265 | data->temp_min[index]); | |
266 | mutex_unlock(&data->update_lock); | |
267 | return count; | |
268 | } | |
269 | ||
270 | static ssize_t set_temp_max(struct device *dev, struct device_attribute *attr, | |
271 | const char *buf, size_t count) | |
272 | { | |
273 | int index = to_sensor_dev_attr(attr)->index; | |
274 | struct i2c_client *client = to_i2c_client(dev); | |
275 | struct adm1025_data *data = i2c_get_clientdata(client); | |
276 | long val = simple_strtol(buf, NULL, 10); | |
277 | ||
278 | mutex_lock(&data->update_lock); | |
279 | data->temp_max[index] = TEMP_TO_REG(val); | |
280 | i2c_smbus_write_byte_data(client, ADM1025_REG_TEMP_HIGH(index), | |
281 | data->temp_max[index]); | |
282 | mutex_unlock(&data->update_lock); | |
283 | return count; | |
284 | } | |
285 | ||
1da177e4 | 286 | #define set_temp(offset) \ |
d8543e7f JD |
287 | static SENSOR_DEVICE_ATTR(temp##offset##_input, S_IRUGO, \ |
288 | show_temp, NULL, offset - 1); \ | |
289 | static SENSOR_DEVICE_ATTR(temp##offset##_min, S_IWUSR | S_IRUGO, \ | |
290 | show_temp_min, set_temp_min, offset - 1); \ | |
291 | static SENSOR_DEVICE_ATTR(temp##offset##_max, S_IWUSR | S_IRUGO, \ | |
292 | show_temp_max, set_temp_max, offset - 1) | |
1da177e4 LT |
293 | set_temp(1); |
294 | set_temp(2); | |
295 | ||
74880c06 | 296 | static ssize_t show_alarms(struct device *dev, struct device_attribute *attr, char *buf) |
1da177e4 LT |
297 | { |
298 | struct adm1025_data *data = adm1025_update_device(dev); | |
299 | return sprintf(buf, "%u\n", data->alarms); | |
300 | } | |
301 | static DEVICE_ATTR(alarms, S_IRUGO, show_alarms, NULL); | |
302 | ||
bb081300 JD |
303 | static ssize_t |
304 | show_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 | } | |
310 | static SENSOR_DEVICE_ATTR(in0_alarm, S_IRUGO, show_alarm, NULL, 0); | |
311 | static SENSOR_DEVICE_ATTR(in1_alarm, S_IRUGO, show_alarm, NULL, 1); | |
312 | static SENSOR_DEVICE_ATTR(in2_alarm, S_IRUGO, show_alarm, NULL, 2); | |
313 | static SENSOR_DEVICE_ATTR(in3_alarm, S_IRUGO, show_alarm, NULL, 3); | |
314 | static SENSOR_DEVICE_ATTR(in4_alarm, S_IRUGO, show_alarm, NULL, 8); | |
315 | static SENSOR_DEVICE_ATTR(in5_alarm, S_IRUGO, show_alarm, NULL, 9); | |
316 | static SENSOR_DEVICE_ATTR(temp1_alarm, S_IRUGO, show_alarm, NULL, 5); | |
317 | static SENSOR_DEVICE_ATTR(temp2_alarm, S_IRUGO, show_alarm, NULL, 4); | |
318 | static SENSOR_DEVICE_ATTR(temp1_fault, S_IRUGO, show_alarm, NULL, 14); | |
319 | ||
74880c06 | 320 | static ssize_t show_vid(struct device *dev, struct device_attribute *attr, char *buf) |
1da177e4 LT |
321 | { |
322 | struct adm1025_data *data = adm1025_update_device(dev); | |
323 | return sprintf(buf, "%u\n", vid_from_reg(data->vid, data->vrm)); | |
324 | } | |
937df8df | 325 | static DEVICE_ATTR(cpu0_vid, S_IRUGO, show_vid, NULL); |
1da177e4 | 326 | |
74880c06 | 327 | static ssize_t show_vrm(struct device *dev, struct device_attribute *attr, char *buf) |
1da177e4 | 328 | { |
90d6619a | 329 | struct adm1025_data *data = dev_get_drvdata(dev); |
1da177e4 LT |
330 | return sprintf(buf, "%u\n", data->vrm); |
331 | } | |
74880c06 | 332 | static ssize_t set_vrm(struct device *dev, struct device_attribute *attr, const char *buf, size_t count) |
1da177e4 LT |
333 | { |
334 | struct i2c_client *client = to_i2c_client(dev); | |
335 | struct adm1025_data *data = i2c_get_clientdata(client); | |
336 | data->vrm = simple_strtoul(buf, NULL, 10); | |
337 | return count; | |
338 | } | |
339 | static DEVICE_ATTR(vrm, S_IRUGO | S_IWUSR, show_vrm, set_vrm); | |
340 | ||
341 | /* | |
342 | * Real code | |
343 | */ | |
344 | ||
345 | static int adm1025_attach_adapter(struct i2c_adapter *adapter) | |
346 | { | |
347 | if (!(adapter->class & I2C_CLASS_HWMON)) | |
348 | return 0; | |
2ed2dc3c | 349 | return i2c_probe(adapter, &addr_data, adm1025_detect); |
1da177e4 LT |
350 | } |
351 | ||
681c6f7a | 352 | static struct attribute *adm1025_attributes[] = { |
d8543e7f JD |
353 | &sensor_dev_attr_in0_input.dev_attr.attr, |
354 | &sensor_dev_attr_in1_input.dev_attr.attr, | |
355 | &sensor_dev_attr_in2_input.dev_attr.attr, | |
356 | &sensor_dev_attr_in3_input.dev_attr.attr, | |
357 | &sensor_dev_attr_in5_input.dev_attr.attr, | |
358 | &sensor_dev_attr_in0_min.dev_attr.attr, | |
359 | &sensor_dev_attr_in1_min.dev_attr.attr, | |
360 | &sensor_dev_attr_in2_min.dev_attr.attr, | |
361 | &sensor_dev_attr_in3_min.dev_attr.attr, | |
362 | &sensor_dev_attr_in5_min.dev_attr.attr, | |
363 | &sensor_dev_attr_in0_max.dev_attr.attr, | |
364 | &sensor_dev_attr_in1_max.dev_attr.attr, | |
365 | &sensor_dev_attr_in2_max.dev_attr.attr, | |
366 | &sensor_dev_attr_in3_max.dev_attr.attr, | |
367 | &sensor_dev_attr_in5_max.dev_attr.attr, | |
bb081300 JD |
368 | &sensor_dev_attr_in0_alarm.dev_attr.attr, |
369 | &sensor_dev_attr_in1_alarm.dev_attr.attr, | |
370 | &sensor_dev_attr_in2_alarm.dev_attr.attr, | |
371 | &sensor_dev_attr_in3_alarm.dev_attr.attr, | |
372 | &sensor_dev_attr_in5_alarm.dev_attr.attr, | |
d8543e7f JD |
373 | &sensor_dev_attr_temp1_input.dev_attr.attr, |
374 | &sensor_dev_attr_temp2_input.dev_attr.attr, | |
375 | &sensor_dev_attr_temp1_min.dev_attr.attr, | |
376 | &sensor_dev_attr_temp2_min.dev_attr.attr, | |
377 | &sensor_dev_attr_temp1_max.dev_attr.attr, | |
378 | &sensor_dev_attr_temp2_max.dev_attr.attr, | |
bb081300 JD |
379 | &sensor_dev_attr_temp1_alarm.dev_attr.attr, |
380 | &sensor_dev_attr_temp2_alarm.dev_attr.attr, | |
381 | &sensor_dev_attr_temp1_fault.dev_attr.attr, | |
681c6f7a MH |
382 | &dev_attr_alarms.attr, |
383 | &dev_attr_cpu0_vid.attr, | |
384 | &dev_attr_vrm.attr, | |
385 | NULL | |
386 | }; | |
387 | ||
388 | static const struct attribute_group adm1025_group = { | |
389 | .attrs = adm1025_attributes, | |
390 | }; | |
391 | ||
392 | static struct attribute *adm1025_attributes_opt[] = { | |
d8543e7f JD |
393 | &sensor_dev_attr_in4_input.dev_attr.attr, |
394 | &sensor_dev_attr_in4_min.dev_attr.attr, | |
395 | &sensor_dev_attr_in4_max.dev_attr.attr, | |
bb081300 | 396 | &sensor_dev_attr_in4_alarm.dev_attr.attr, |
681c6f7a MH |
397 | NULL |
398 | }; | |
399 | ||
400 | static const struct attribute_group adm1025_group_opt = { | |
401 | .attrs = adm1025_attributes_opt, | |
402 | }; | |
403 | ||
1da177e4 LT |
404 | /* |
405 | * The following function does more than just detection. If detection | |
406 | * succeeds, it also registers the new chip. | |
407 | */ | |
408 | static int adm1025_detect(struct i2c_adapter *adapter, int address, int kind) | |
409 | { | |
410 | struct i2c_client *new_client; | |
411 | struct adm1025_data *data; | |
412 | int err = 0; | |
413 | const char *name = ""; | |
414 | u8 config; | |
415 | ||
416 | if (!i2c_check_functionality(adapter, I2C_FUNC_SMBUS_BYTE_DATA)) | |
417 | goto exit; | |
418 | ||
ba9c2e8d | 419 | if (!(data = kzalloc(sizeof(struct adm1025_data), GFP_KERNEL))) { |
1da177e4 LT |
420 | err = -ENOMEM; |
421 | goto exit; | |
422 | } | |
1da177e4 LT |
423 | |
424 | /* The common I2C client data is placed right before the | |
425 | ADM1025-specific data. */ | |
426 | new_client = &data->client; | |
427 | i2c_set_clientdata(new_client, data); | |
428 | new_client->addr = address; | |
429 | new_client->adapter = adapter; | |
430 | new_client->driver = &adm1025_driver; | |
431 | new_client->flags = 0; | |
432 | ||
433 | /* | |
434 | * Now we do the remaining detection. A negative kind means that | |
435 | * the driver was loaded with no force parameter (default), so we | |
436 | * must both detect and identify the chip. A zero kind means that | |
437 | * the driver was loaded with the force parameter, the detection | |
438 | * step shall be skipped. A positive kind means that the driver | |
439 | * was loaded with the force parameter and a given kind of chip is | |
440 | * requested, so both the detection and the identification steps | |
441 | * are skipped. | |
442 | */ | |
443 | config = i2c_smbus_read_byte_data(new_client, ADM1025_REG_CONFIG); | |
444 | if (kind < 0) { /* detection */ | |
445 | if ((config & 0x80) != 0x00 | |
446 | || (i2c_smbus_read_byte_data(new_client, | |
447 | ADM1025_REG_STATUS1) & 0xC0) != 0x00 | |
448 | || (i2c_smbus_read_byte_data(new_client, | |
449 | ADM1025_REG_STATUS2) & 0xBC) != 0x00) { | |
450 | dev_dbg(&adapter->dev, | |
451 | "ADM1025 detection failed at 0x%02x.\n", | |
452 | address); | |
453 | goto exit_free; | |
454 | } | |
455 | } | |
456 | ||
457 | if (kind <= 0) { /* identification */ | |
458 | u8 man_id, chip_id; | |
459 | ||
460 | man_id = i2c_smbus_read_byte_data(new_client, | |
461 | ADM1025_REG_MAN_ID); | |
462 | chip_id = i2c_smbus_read_byte_data(new_client, | |
463 | ADM1025_REG_CHIP_ID); | |
464 | ||
465 | if (man_id == 0x41) { /* Analog Devices */ | |
466 | if ((chip_id & 0xF0) == 0x20) { /* ADM1025/ADM1025A */ | |
467 | kind = adm1025; | |
468 | } | |
469 | } else | |
470 | if (man_id == 0xA1) { /* Philips */ | |
471 | if (address != 0x2E | |
472 | && (chip_id & 0xF0) == 0x20) { /* NE1619 */ | |
473 | kind = ne1619; | |
474 | } | |
475 | } | |
476 | ||
477 | if (kind <= 0) { /* identification failed */ | |
478 | dev_info(&adapter->dev, | |
479 | "Unsupported chip (man_id=0x%02X, " | |
480 | "chip_id=0x%02X).\n", man_id, chip_id); | |
481 | goto exit_free; | |
482 | } | |
483 | } | |
484 | ||
485 | if (kind == adm1025) { | |
486 | name = "adm1025"; | |
487 | } else if (kind == ne1619) { | |
488 | name = "ne1619"; | |
489 | } | |
490 | ||
491 | /* We can fill in the remaining client fields */ | |
492 | strlcpy(new_client->name, name, I2C_NAME_SIZE); | |
493 | data->valid = 0; | |
9a61bf63 | 494 | mutex_init(&data->update_lock); |
1da177e4 LT |
495 | |
496 | /* Tell the I2C layer a new client has arrived */ | |
497 | if ((err = i2c_attach_client(new_client))) | |
498 | goto exit_free; | |
499 | ||
500 | /* Initialize the ADM1025 chip */ | |
501 | adm1025_init_client(new_client); | |
502 | ||
503 | /* Register sysfs hooks */ | |
681c6f7a | 504 | if ((err = sysfs_create_group(&new_client->dev.kobj, &adm1025_group))) |
943b0830 | 505 | goto exit_detach; |
1da177e4 LT |
506 | |
507 | /* Pin 11 is either in4 (+12V) or VID4 */ | |
508 | if (!(config & 0x20)) { | |
681c6f7a | 509 | if ((err = device_create_file(&new_client->dev, |
d8543e7f | 510 | &sensor_dev_attr_in4_input.dev_attr)) |
681c6f7a | 511 | || (err = device_create_file(&new_client->dev, |
d8543e7f | 512 | &sensor_dev_attr_in4_min.dev_attr)) |
681c6f7a | 513 | || (err = device_create_file(&new_client->dev, |
bb081300 JD |
514 | &sensor_dev_attr_in4_max.dev_attr)) |
515 | || (err = device_create_file(&new_client->dev, | |
516 | &sensor_dev_attr_in4_alarm.dev_attr))) | |
681c6f7a MH |
517 | goto exit_remove; |
518 | } | |
519 | ||
1beeffe4 TJ |
520 | data->hwmon_dev = hwmon_device_register(&new_client->dev); |
521 | if (IS_ERR(data->hwmon_dev)) { | |
522 | err = PTR_ERR(data->hwmon_dev); | |
681c6f7a | 523 | goto exit_remove; |
1da177e4 LT |
524 | } |
525 | ||
526 | return 0; | |
527 | ||
681c6f7a MH |
528 | exit_remove: |
529 | sysfs_remove_group(&new_client->dev.kobj, &adm1025_group); | |
530 | sysfs_remove_group(&new_client->dev.kobj, &adm1025_group_opt); | |
943b0830 MH |
531 | exit_detach: |
532 | i2c_detach_client(new_client); | |
1da177e4 LT |
533 | exit_free: |
534 | kfree(data); | |
535 | exit: | |
536 | return err; | |
537 | } | |
538 | ||
539 | static void adm1025_init_client(struct i2c_client *client) | |
540 | { | |
541 | u8 reg; | |
542 | struct adm1025_data *data = i2c_get_clientdata(client); | |
543 | int i; | |
544 | ||
303760b4 | 545 | data->vrm = vid_which_vrm(); |
1da177e4 LT |
546 | |
547 | /* | |
548 | * Set high limits | |
549 | * Usually we avoid setting limits on driver init, but it happens | |
550 | * that the ADM1025 comes with stupid default limits (all registers | |
551 | * set to 0). In case the chip has not gone through any limit | |
552 | * setting yet, we better set the high limits to the max so that | |
553 | * no alarm triggers. | |
554 | */ | |
555 | for (i=0; i<6; i++) { | |
556 | reg = i2c_smbus_read_byte_data(client, | |
557 | ADM1025_REG_IN_MAX(i)); | |
558 | if (reg == 0) | |
559 | i2c_smbus_write_byte_data(client, | |
560 | ADM1025_REG_IN_MAX(i), | |
561 | 0xFF); | |
562 | } | |
563 | for (i=0; i<2; i++) { | |
564 | reg = i2c_smbus_read_byte_data(client, | |
565 | ADM1025_REG_TEMP_HIGH(i)); | |
566 | if (reg == 0) | |
567 | i2c_smbus_write_byte_data(client, | |
568 | ADM1025_REG_TEMP_HIGH(i), | |
569 | 0x7F); | |
570 | } | |
571 | ||
572 | /* | |
573 | * Start the conversions | |
574 | */ | |
575 | reg = i2c_smbus_read_byte_data(client, ADM1025_REG_CONFIG); | |
576 | if (!(reg & 0x01)) | |
577 | i2c_smbus_write_byte_data(client, ADM1025_REG_CONFIG, | |
578 | (reg&0x7E)|0x01); | |
579 | } | |
580 | ||
581 | static int adm1025_detach_client(struct i2c_client *client) | |
582 | { | |
943b0830 | 583 | struct adm1025_data *data = i2c_get_clientdata(client); |
1da177e4 LT |
584 | int err; |
585 | ||
1beeffe4 | 586 | hwmon_device_unregister(data->hwmon_dev); |
681c6f7a MH |
587 | sysfs_remove_group(&client->dev.kobj, &adm1025_group); |
588 | sysfs_remove_group(&client->dev.kobj, &adm1025_group_opt); | |
943b0830 | 589 | |
7bef5594 | 590 | if ((err = i2c_detach_client(client))) |
1da177e4 | 591 | return err; |
1da177e4 | 592 | |
943b0830 | 593 | kfree(data); |
1da177e4 LT |
594 | return 0; |
595 | } | |
596 | ||
597 | static struct adm1025_data *adm1025_update_device(struct device *dev) | |
598 | { | |
599 | struct i2c_client *client = to_i2c_client(dev); | |
600 | struct adm1025_data *data = i2c_get_clientdata(client); | |
601 | ||
9a61bf63 | 602 | mutex_lock(&data->update_lock); |
1da177e4 LT |
603 | |
604 | if (time_after(jiffies, data->last_updated + HZ * 2) || !data->valid) { | |
605 | int i; | |
606 | ||
607 | dev_dbg(&client->dev, "Updating data.\n"); | |
608 | for (i=0; i<6; i++) { | |
609 | data->in[i] = i2c_smbus_read_byte_data(client, | |
610 | ADM1025_REG_IN(i)); | |
611 | data->in_min[i] = i2c_smbus_read_byte_data(client, | |
612 | ADM1025_REG_IN_MIN(i)); | |
613 | data->in_max[i] = i2c_smbus_read_byte_data(client, | |
614 | ADM1025_REG_IN_MAX(i)); | |
615 | } | |
616 | for (i=0; i<2; i++) { | |
617 | data->temp[i] = i2c_smbus_read_byte_data(client, | |
618 | ADM1025_REG_TEMP(i)); | |
619 | data->temp_min[i] = i2c_smbus_read_byte_data(client, | |
620 | ADM1025_REG_TEMP_LOW(i)); | |
621 | data->temp_max[i] = i2c_smbus_read_byte_data(client, | |
622 | ADM1025_REG_TEMP_HIGH(i)); | |
623 | } | |
624 | data->alarms = i2c_smbus_read_byte_data(client, | |
625 | ADM1025_REG_STATUS1) | |
626 | | (i2c_smbus_read_byte_data(client, | |
627 | ADM1025_REG_STATUS2) << 8); | |
628 | data->vid = (i2c_smbus_read_byte_data(client, | |
629 | ADM1025_REG_VID) & 0x0f) | |
630 | | ((i2c_smbus_read_byte_data(client, | |
631 | ADM1025_REG_VID4) & 0x01) << 4); | |
632 | ||
633 | data->last_updated = jiffies; | |
634 | data->valid = 1; | |
635 | } | |
636 | ||
9a61bf63 | 637 | mutex_unlock(&data->update_lock); |
1da177e4 LT |
638 | |
639 | return data; | |
640 | } | |
641 | ||
642 | static int __init sensors_adm1025_init(void) | |
643 | { | |
644 | return i2c_add_driver(&adm1025_driver); | |
645 | } | |
646 | ||
647 | static void __exit sensors_adm1025_exit(void) | |
648 | { | |
649 | i2c_del_driver(&adm1025_driver); | |
650 | } | |
651 | ||
652 | MODULE_AUTHOR("Jean Delvare <khali@linux-fr.org>"); | |
653 | MODULE_DESCRIPTION("ADM1025 driver"); | |
654 | MODULE_LICENSE("GPL"); | |
655 | ||
656 | module_init(sensors_adm1025_init); | |
657 | module_exit(sensors_adm1025_exit); |