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ab2b79d5 HG |
1 | /* tmp401.c |
2 | * | |
3 | * Copyright (C) 2007,2008 Hans de Goede <hdegoede@redhat.com> | |
fce0758f AP |
4 | * Preliminary tmp411 support by: |
5 | * Gabriel Konat, Sander Leget, Wouter Willems | |
6 | * Copyright (C) 2009 Andre Prendel <andre.prendel@gmx.de> | |
ab2b79d5 HG |
7 | * |
8 | * This program is free software; you can redistribute it and/or modify | |
9 | * it under the terms of the GNU General Public License as published by | |
10 | * the Free Software Foundation; either version 2 of the License, or | |
11 | * (at your option) any later version. | |
12 | * | |
13 | * This program is distributed in the hope that it will be useful, | |
14 | * but WITHOUT ANY WARRANTY; without even the implied warranty of | |
15 | * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the | |
16 | * GNU General Public License for more details. | |
17 | * | |
18 | * You should have received a copy of the GNU General Public License | |
19 | * along with this program; if not, write to the Free Software | |
20 | * Foundation, Inc., 675 Mass Ave, Cambridge, MA 02139, USA. | |
21 | */ | |
22 | ||
23 | /* | |
24 | * Driver for the Texas Instruments TMP401 SMBUS temperature sensor IC. | |
25 | * | |
26 | * Note this IC is in some aspect similar to the LM90, but it has quite a | |
27 | * few differences too, for example the local temp has a higher resolution | |
28 | * and thus has 16 bits registers for its value and limit instead of 8 bits. | |
29 | */ | |
30 | ||
31 | #include <linux/module.h> | |
32 | #include <linux/init.h> | |
33 | #include <linux/slab.h> | |
34 | #include <linux/jiffies.h> | |
35 | #include <linux/i2c.h> | |
36 | #include <linux/hwmon.h> | |
37 | #include <linux/hwmon-sysfs.h> | |
38 | #include <linux/err.h> | |
39 | #include <linux/mutex.h> | |
40 | #include <linux/sysfs.h> | |
41 | ||
42 | /* Addresses to scan */ | |
43 | static const unsigned short normal_i2c[] = { 0x4c, I2C_CLIENT_END }; | |
44 | ||
e5e9f44c | 45 | enum chips { tmp401, tmp411 }; |
ab2b79d5 HG |
46 | |
47 | /* | |
48 | * The TMP401 registers, note some registers have different addresses for | |
49 | * reading and writing | |
50 | */ | |
51 | #define TMP401_STATUS 0x02 | |
52 | #define TMP401_CONFIG_READ 0x03 | |
53 | #define TMP401_CONFIG_WRITE 0x09 | |
54 | #define TMP401_CONVERSION_RATE_READ 0x04 | |
55 | #define TMP401_CONVERSION_RATE_WRITE 0x0A | |
56 | #define TMP401_TEMP_CRIT_HYST 0x21 | |
57 | #define TMP401_CONSECUTIVE_ALERT 0x22 | |
58 | #define TMP401_MANUFACTURER_ID_REG 0xFE | |
59 | #define TMP401_DEVICE_ID_REG 0xFF | |
fce0758f | 60 | #define TMP411_N_FACTOR_REG 0x18 |
ab2b79d5 HG |
61 | |
62 | static const u8 TMP401_TEMP_MSB[2] = { 0x00, 0x01 }; | |
63 | static const u8 TMP401_TEMP_LSB[2] = { 0x15, 0x10 }; | |
64 | static const u8 TMP401_TEMP_LOW_LIMIT_MSB_READ[2] = { 0x06, 0x08 }; | |
65 | static const u8 TMP401_TEMP_LOW_LIMIT_MSB_WRITE[2] = { 0x0C, 0x0E }; | |
66 | static const u8 TMP401_TEMP_LOW_LIMIT_LSB[2] = { 0x17, 0x14 }; | |
67 | static const u8 TMP401_TEMP_HIGH_LIMIT_MSB_READ[2] = { 0x05, 0x07 }; | |
68 | static const u8 TMP401_TEMP_HIGH_LIMIT_MSB_WRITE[2] = { 0x0B, 0x0D }; | |
69 | static const u8 TMP401_TEMP_HIGH_LIMIT_LSB[2] = { 0x16, 0x13 }; | |
70 | /* These are called the THERM limit / hysteresis / mask in the datasheet */ | |
71 | static const u8 TMP401_TEMP_CRIT_LIMIT[2] = { 0x20, 0x19 }; | |
72 | ||
fce0758f AP |
73 | static const u8 TMP411_TEMP_LOWEST_MSB[2] = { 0x30, 0x34 }; |
74 | static const u8 TMP411_TEMP_LOWEST_LSB[2] = { 0x31, 0x35 }; | |
75 | static const u8 TMP411_TEMP_HIGHEST_MSB[2] = { 0x32, 0x36 }; | |
76 | static const u8 TMP411_TEMP_HIGHEST_LSB[2] = { 0x33, 0x37 }; | |
77 | ||
ab2b79d5 HG |
78 | /* Flags */ |
79 | #define TMP401_CONFIG_RANGE 0x04 | |
80 | #define TMP401_CONFIG_SHUTDOWN 0x40 | |
81 | #define TMP401_STATUS_LOCAL_CRIT 0x01 | |
82 | #define TMP401_STATUS_REMOTE_CRIT 0x02 | |
83 | #define TMP401_STATUS_REMOTE_OPEN 0x04 | |
84 | #define TMP401_STATUS_REMOTE_LOW 0x08 | |
85 | #define TMP401_STATUS_REMOTE_HIGH 0x10 | |
86 | #define TMP401_STATUS_LOCAL_LOW 0x20 | |
87 | #define TMP401_STATUS_LOCAL_HIGH 0x40 | |
88 | ||
89 | /* Manufacturer / Device ID's */ | |
90 | #define TMP401_MANUFACTURER_ID 0x55 | |
91 | #define TMP401_DEVICE_ID 0x11 | |
fce0758f | 92 | #define TMP411_DEVICE_ID 0x12 |
ab2b79d5 | 93 | |
ab2b79d5 HG |
94 | /* |
95 | * Driver data (common to all clients) | |
96 | */ | |
97 | ||
98 | static const struct i2c_device_id tmp401_id[] = { | |
99 | { "tmp401", tmp401 }, | |
fce0758f | 100 | { "tmp411", tmp411 }, |
ab2b79d5 HG |
101 | { } |
102 | }; | |
103 | MODULE_DEVICE_TABLE(i2c, tmp401_id); | |
104 | ||
ab2b79d5 HG |
105 | /* |
106 | * Client data (each client gets its own) | |
107 | */ | |
108 | ||
109 | struct tmp401_data { | |
110 | struct device *hwmon_dev; | |
111 | struct mutex update_lock; | |
112 | char valid; /* zero until following fields are valid */ | |
113 | unsigned long last_updated; /* in jiffies */ | |
dc71afe5 | 114 | enum chips kind; |
ab2b79d5 HG |
115 | |
116 | /* register values */ | |
117 | u8 status; | |
118 | u8 config; | |
119 | u16 temp[2]; | |
120 | u16 temp_low[2]; | |
121 | u16 temp_high[2]; | |
122 | u8 temp_crit[2]; | |
123 | u8 temp_crit_hyst; | |
fce0758f AP |
124 | u16 temp_lowest[2]; |
125 | u16 temp_highest[2]; | |
ab2b79d5 HG |
126 | }; |
127 | ||
128 | /* | |
129 | * Sysfs attr show / store functions | |
130 | */ | |
131 | ||
132 | static int tmp401_register_to_temp(u16 reg, u8 config) | |
133 | { | |
134 | int temp = reg; | |
135 | ||
136 | if (config & TMP401_CONFIG_RANGE) | |
137 | temp -= 64 * 256; | |
138 | ||
139 | return (temp * 625 + 80) / 160; | |
140 | } | |
141 | ||
142 | static u16 tmp401_temp_to_register(long temp, u8 config) | |
143 | { | |
144 | if (config & TMP401_CONFIG_RANGE) { | |
145 | temp = SENSORS_LIMIT(temp, -64000, 191000); | |
146 | temp += 64000; | |
147 | } else | |
148 | temp = SENSORS_LIMIT(temp, 0, 127000); | |
149 | ||
150 | return (temp * 160 + 312) / 625; | |
151 | } | |
152 | ||
153 | static int tmp401_crit_register_to_temp(u8 reg, u8 config) | |
154 | { | |
155 | int temp = reg; | |
156 | ||
157 | if (config & TMP401_CONFIG_RANGE) | |
158 | temp -= 64; | |
159 | ||
160 | return temp * 1000; | |
161 | } | |
162 | ||
163 | static u8 tmp401_crit_temp_to_register(long temp, u8 config) | |
164 | { | |
165 | if (config & TMP401_CONFIG_RANGE) { | |
166 | temp = SENSORS_LIMIT(temp, -64000, 191000); | |
167 | temp += 64000; | |
168 | } else | |
169 | temp = SENSORS_LIMIT(temp, 0, 127000); | |
170 | ||
171 | return (temp + 500) / 1000; | |
172 | } | |
173 | ||
ea63c2b9 AP |
174 | static struct tmp401_data *tmp401_update_device_reg16( |
175 | struct i2c_client *client, struct tmp401_data *data) | |
176 | { | |
177 | int i; | |
178 | ||
179 | for (i = 0; i < 2; i++) { | |
180 | /* | |
181 | * High byte must be read first immediately followed | |
182 | * by the low byte | |
183 | */ | |
184 | data->temp[i] = i2c_smbus_read_byte_data(client, | |
185 | TMP401_TEMP_MSB[i]) << 8; | |
186 | data->temp[i] |= i2c_smbus_read_byte_data(client, | |
187 | TMP401_TEMP_LSB[i]); | |
188 | data->temp_low[i] = i2c_smbus_read_byte_data(client, | |
189 | TMP401_TEMP_LOW_LIMIT_MSB_READ[i]) << 8; | |
190 | data->temp_low[i] |= i2c_smbus_read_byte_data(client, | |
191 | TMP401_TEMP_LOW_LIMIT_LSB[i]); | |
192 | data->temp_high[i] = i2c_smbus_read_byte_data(client, | |
193 | TMP401_TEMP_HIGH_LIMIT_MSB_READ[i]) << 8; | |
194 | data->temp_high[i] |= i2c_smbus_read_byte_data(client, | |
195 | TMP401_TEMP_HIGH_LIMIT_LSB[i]); | |
196 | data->temp_crit[i] = i2c_smbus_read_byte_data(client, | |
197 | TMP401_TEMP_CRIT_LIMIT[i]); | |
198 | ||
199 | if (data->kind == tmp411) { | |
200 | data->temp_lowest[i] = i2c_smbus_read_byte_data(client, | |
201 | TMP411_TEMP_LOWEST_MSB[i]) << 8; | |
202 | data->temp_lowest[i] |= i2c_smbus_read_byte_data( | |
203 | client, TMP411_TEMP_LOWEST_LSB[i]); | |
204 | ||
205 | data->temp_highest[i] = i2c_smbus_read_byte_data( | |
206 | client, TMP411_TEMP_HIGHEST_MSB[i]) << 8; | |
207 | data->temp_highest[i] |= i2c_smbus_read_byte_data( | |
208 | client, TMP411_TEMP_HIGHEST_LSB[i]); | |
209 | } | |
210 | } | |
211 | return data; | |
212 | } | |
213 | ||
214 | static struct tmp401_data *tmp401_update_device(struct device *dev) | |
215 | { | |
216 | struct i2c_client *client = to_i2c_client(dev); | |
217 | struct tmp401_data *data = i2c_get_clientdata(client); | |
218 | ||
219 | mutex_lock(&data->update_lock); | |
220 | ||
221 | if (time_after(jiffies, data->last_updated + HZ) || !data->valid) { | |
222 | data->status = i2c_smbus_read_byte_data(client, TMP401_STATUS); | |
223 | data->config = i2c_smbus_read_byte_data(client, | |
224 | TMP401_CONFIG_READ); | |
225 | tmp401_update_device_reg16(client, data); | |
226 | ||
227 | data->temp_crit_hyst = i2c_smbus_read_byte_data(client, | |
228 | TMP401_TEMP_CRIT_HYST); | |
229 | ||
230 | data->last_updated = jiffies; | |
231 | data->valid = 1; | |
232 | } | |
233 | ||
234 | mutex_unlock(&data->update_lock); | |
235 | ||
236 | return data; | |
237 | } | |
238 | ||
ab2b79d5 HG |
239 | static ssize_t show_temp_value(struct device *dev, |
240 | struct device_attribute *devattr, char *buf) | |
241 | { | |
242 | int index = to_sensor_dev_attr(devattr)->index; | |
243 | struct tmp401_data *data = tmp401_update_device(dev); | |
244 | ||
245 | return sprintf(buf, "%d\n", | |
246 | tmp401_register_to_temp(data->temp[index], data->config)); | |
247 | } | |
248 | ||
249 | static ssize_t show_temp_min(struct device *dev, | |
250 | struct device_attribute *devattr, char *buf) | |
251 | { | |
252 | int index = to_sensor_dev_attr(devattr)->index; | |
253 | struct tmp401_data *data = tmp401_update_device(dev); | |
254 | ||
255 | return sprintf(buf, "%d\n", | |
256 | tmp401_register_to_temp(data->temp_low[index], data->config)); | |
257 | } | |
258 | ||
259 | static ssize_t show_temp_max(struct device *dev, | |
260 | struct device_attribute *devattr, char *buf) | |
261 | { | |
262 | int index = to_sensor_dev_attr(devattr)->index; | |
263 | struct tmp401_data *data = tmp401_update_device(dev); | |
264 | ||
265 | return sprintf(buf, "%d\n", | |
266 | tmp401_register_to_temp(data->temp_high[index], data->config)); | |
267 | } | |
268 | ||
269 | static ssize_t show_temp_crit(struct device *dev, | |
270 | struct device_attribute *devattr, char *buf) | |
271 | { | |
272 | int index = to_sensor_dev_attr(devattr)->index; | |
273 | struct tmp401_data *data = tmp401_update_device(dev); | |
274 | ||
275 | return sprintf(buf, "%d\n", | |
276 | tmp401_crit_register_to_temp(data->temp_crit[index], | |
277 | data->config)); | |
278 | } | |
279 | ||
280 | static ssize_t show_temp_crit_hyst(struct device *dev, | |
281 | struct device_attribute *devattr, char *buf) | |
282 | { | |
283 | int temp, index = to_sensor_dev_attr(devattr)->index; | |
284 | struct tmp401_data *data = tmp401_update_device(dev); | |
285 | ||
286 | mutex_lock(&data->update_lock); | |
287 | temp = tmp401_crit_register_to_temp(data->temp_crit[index], | |
288 | data->config); | |
289 | temp -= data->temp_crit_hyst * 1000; | |
290 | mutex_unlock(&data->update_lock); | |
291 | ||
292 | return sprintf(buf, "%d\n", temp); | |
293 | } | |
294 | ||
fce0758f AP |
295 | static ssize_t show_temp_lowest(struct device *dev, |
296 | struct device_attribute *devattr, char *buf) | |
297 | { | |
298 | int index = to_sensor_dev_attr(devattr)->index; | |
299 | struct tmp401_data *data = tmp401_update_device(dev); | |
300 | ||
301 | return sprintf(buf, "%d\n", | |
302 | tmp401_register_to_temp(data->temp_lowest[index], | |
303 | data->config)); | |
304 | } | |
305 | ||
306 | static ssize_t show_temp_highest(struct device *dev, | |
307 | struct device_attribute *devattr, char *buf) | |
308 | { | |
309 | int index = to_sensor_dev_attr(devattr)->index; | |
310 | struct tmp401_data *data = tmp401_update_device(dev); | |
311 | ||
312 | return sprintf(buf, "%d\n", | |
313 | tmp401_register_to_temp(data->temp_highest[index], | |
314 | data->config)); | |
315 | } | |
316 | ||
ab2b79d5 HG |
317 | static ssize_t show_status(struct device *dev, |
318 | struct device_attribute *devattr, char *buf) | |
319 | { | |
320 | int mask = to_sensor_dev_attr(devattr)->index; | |
321 | struct tmp401_data *data = tmp401_update_device(dev); | |
322 | ||
323 | if (data->status & mask) | |
324 | return sprintf(buf, "1\n"); | |
325 | else | |
326 | return sprintf(buf, "0\n"); | |
327 | } | |
328 | ||
329 | static ssize_t store_temp_min(struct device *dev, struct device_attribute | |
330 | *devattr, const char *buf, size_t count) | |
331 | { | |
332 | int index = to_sensor_dev_attr(devattr)->index; | |
333 | struct tmp401_data *data = tmp401_update_device(dev); | |
334 | long val; | |
335 | u16 reg; | |
336 | ||
337 | if (strict_strtol(buf, 10, &val)) | |
338 | return -EINVAL; | |
339 | ||
340 | reg = tmp401_temp_to_register(val, data->config); | |
341 | ||
342 | mutex_lock(&data->update_lock); | |
343 | ||
344 | i2c_smbus_write_byte_data(to_i2c_client(dev), | |
345 | TMP401_TEMP_LOW_LIMIT_MSB_WRITE[index], reg >> 8); | |
346 | i2c_smbus_write_byte_data(to_i2c_client(dev), | |
347 | TMP401_TEMP_LOW_LIMIT_LSB[index], reg & 0xFF); | |
348 | ||
349 | data->temp_low[index] = reg; | |
350 | ||
351 | mutex_unlock(&data->update_lock); | |
352 | ||
353 | return count; | |
354 | } | |
355 | ||
356 | static ssize_t store_temp_max(struct device *dev, struct device_attribute | |
357 | *devattr, const char *buf, size_t count) | |
358 | { | |
359 | int index = to_sensor_dev_attr(devattr)->index; | |
360 | struct tmp401_data *data = tmp401_update_device(dev); | |
361 | long val; | |
362 | u16 reg; | |
363 | ||
364 | if (strict_strtol(buf, 10, &val)) | |
365 | return -EINVAL; | |
366 | ||
367 | reg = tmp401_temp_to_register(val, data->config); | |
368 | ||
369 | mutex_lock(&data->update_lock); | |
370 | ||
371 | i2c_smbus_write_byte_data(to_i2c_client(dev), | |
372 | TMP401_TEMP_HIGH_LIMIT_MSB_WRITE[index], reg >> 8); | |
373 | i2c_smbus_write_byte_data(to_i2c_client(dev), | |
374 | TMP401_TEMP_HIGH_LIMIT_LSB[index], reg & 0xFF); | |
375 | ||
376 | data->temp_high[index] = reg; | |
377 | ||
378 | mutex_unlock(&data->update_lock); | |
379 | ||
380 | return count; | |
381 | } | |
382 | ||
383 | static ssize_t store_temp_crit(struct device *dev, struct device_attribute | |
384 | *devattr, const char *buf, size_t count) | |
385 | { | |
386 | int index = to_sensor_dev_attr(devattr)->index; | |
387 | struct tmp401_data *data = tmp401_update_device(dev); | |
388 | long val; | |
389 | u8 reg; | |
390 | ||
391 | if (strict_strtol(buf, 10, &val)) | |
392 | return -EINVAL; | |
393 | ||
394 | reg = tmp401_crit_temp_to_register(val, data->config); | |
395 | ||
396 | mutex_lock(&data->update_lock); | |
397 | ||
398 | i2c_smbus_write_byte_data(to_i2c_client(dev), | |
399 | TMP401_TEMP_CRIT_LIMIT[index], reg); | |
400 | ||
401 | data->temp_crit[index] = reg; | |
402 | ||
403 | mutex_unlock(&data->update_lock); | |
404 | ||
405 | return count; | |
406 | } | |
407 | ||
408 | static ssize_t store_temp_crit_hyst(struct device *dev, struct device_attribute | |
409 | *devattr, const char *buf, size_t count) | |
410 | { | |
411 | int temp, index = to_sensor_dev_attr(devattr)->index; | |
412 | struct tmp401_data *data = tmp401_update_device(dev); | |
413 | long val; | |
414 | u8 reg; | |
415 | ||
416 | if (strict_strtol(buf, 10, &val)) | |
417 | return -EINVAL; | |
418 | ||
419 | if (data->config & TMP401_CONFIG_RANGE) | |
420 | val = SENSORS_LIMIT(val, -64000, 191000); | |
421 | else | |
422 | val = SENSORS_LIMIT(val, 0, 127000); | |
423 | ||
424 | mutex_lock(&data->update_lock); | |
425 | temp = tmp401_crit_register_to_temp(data->temp_crit[index], | |
426 | data->config); | |
427 | val = SENSORS_LIMIT(val, temp - 255000, temp); | |
428 | reg = ((temp - val) + 500) / 1000; | |
429 | ||
430 | i2c_smbus_write_byte_data(to_i2c_client(dev), | |
431 | TMP401_TEMP_CRIT_HYST, reg); | |
432 | ||
433 | data->temp_crit_hyst = reg; | |
434 | ||
435 | mutex_unlock(&data->update_lock); | |
436 | ||
437 | return count; | |
438 | } | |
439 | ||
fce0758f AP |
440 | /* |
441 | * Resets the historical measurements of minimum and maximum temperatures. | |
442 | * This is done by writing any value to any of the minimum/maximum registers | |
443 | * (0x30-0x37). | |
444 | */ | |
445 | static ssize_t reset_temp_history(struct device *dev, | |
446 | struct device_attribute *devattr, const char *buf, size_t count) | |
447 | { | |
448 | long val; | |
449 | ||
450 | if (strict_strtol(buf, 10, &val)) | |
451 | return -EINVAL; | |
452 | ||
453 | if (val != 1) { | |
454 | dev_err(dev, "temp_reset_history value %ld not" | |
455 | " supported. Use 1 to reset the history!\n", val); | |
456 | return -EINVAL; | |
457 | } | |
458 | i2c_smbus_write_byte_data(to_i2c_client(dev), | |
459 | TMP411_TEMP_LOWEST_MSB[0], val); | |
460 | ||
461 | return count; | |
462 | } | |
463 | ||
ab2b79d5 | 464 | static struct sensor_device_attribute tmp401_attr[] = { |
2b76d80a AP |
465 | SENSOR_ATTR(temp1_input, S_IRUGO, show_temp_value, NULL, 0), |
466 | SENSOR_ATTR(temp1_min, S_IWUSR | S_IRUGO, show_temp_min, | |
467 | store_temp_min, 0), | |
468 | SENSOR_ATTR(temp1_max, S_IWUSR | S_IRUGO, show_temp_max, | |
469 | store_temp_max, 0), | |
470 | SENSOR_ATTR(temp1_crit, S_IWUSR | S_IRUGO, show_temp_crit, | |
471 | store_temp_crit, 0), | |
472 | SENSOR_ATTR(temp1_crit_hyst, S_IWUSR | S_IRUGO, show_temp_crit_hyst, | |
ab2b79d5 | 473 | store_temp_crit_hyst, 0), |
2b76d80a | 474 | SENSOR_ATTR(temp1_min_alarm, S_IRUGO, show_status, NULL, |
ab2b79d5 | 475 | TMP401_STATUS_LOCAL_LOW), |
2b76d80a | 476 | SENSOR_ATTR(temp1_max_alarm, S_IRUGO, show_status, NULL, |
ab2b79d5 | 477 | TMP401_STATUS_LOCAL_HIGH), |
2b76d80a | 478 | SENSOR_ATTR(temp1_crit_alarm, S_IRUGO, show_status, NULL, |
ab2b79d5 | 479 | TMP401_STATUS_LOCAL_CRIT), |
2b76d80a AP |
480 | SENSOR_ATTR(temp2_input, S_IRUGO, show_temp_value, NULL, 1), |
481 | SENSOR_ATTR(temp2_min, S_IWUSR | S_IRUGO, show_temp_min, | |
482 | store_temp_min, 1), | |
483 | SENSOR_ATTR(temp2_max, S_IWUSR | S_IRUGO, show_temp_max, | |
484 | store_temp_max, 1), | |
485 | SENSOR_ATTR(temp2_crit, S_IWUSR | S_IRUGO, show_temp_crit, | |
486 | store_temp_crit, 1), | |
487 | SENSOR_ATTR(temp2_crit_hyst, S_IRUGO, show_temp_crit_hyst, NULL, 1), | |
488 | SENSOR_ATTR(temp2_fault, S_IRUGO, show_status, NULL, | |
ab2b79d5 | 489 | TMP401_STATUS_REMOTE_OPEN), |
2b76d80a | 490 | SENSOR_ATTR(temp2_min_alarm, S_IRUGO, show_status, NULL, |
ab2b79d5 | 491 | TMP401_STATUS_REMOTE_LOW), |
2b76d80a | 492 | SENSOR_ATTR(temp2_max_alarm, S_IRUGO, show_status, NULL, |
ab2b79d5 | 493 | TMP401_STATUS_REMOTE_HIGH), |
2b76d80a | 494 | SENSOR_ATTR(temp2_crit_alarm, S_IRUGO, show_status, NULL, |
ab2b79d5 HG |
495 | TMP401_STATUS_REMOTE_CRIT), |
496 | }; | |
497 | ||
fce0758f AP |
498 | /* |
499 | * Additional features of the TMP411 chip. | |
500 | * The TMP411 stores the minimum and maximum | |
501 | * temperature measured since power-on, chip-reset, or | |
502 | * minimum and maximum register reset for both the local | |
503 | * and remote channels. | |
504 | */ | |
505 | static struct sensor_device_attribute tmp411_attr[] = { | |
2b76d80a AP |
506 | SENSOR_ATTR(temp1_highest, S_IRUGO, show_temp_highest, NULL, 0), |
507 | SENSOR_ATTR(temp1_lowest, S_IRUGO, show_temp_lowest, NULL, 0), | |
508 | SENSOR_ATTR(temp2_highest, S_IRUGO, show_temp_highest, NULL, 1), | |
509 | SENSOR_ATTR(temp2_lowest, S_IRUGO, show_temp_lowest, NULL, 1), | |
510 | SENSOR_ATTR(temp_reset_history, S_IWUSR, NULL, reset_temp_history, 0), | |
fce0758f AP |
511 | }; |
512 | ||
ab2b79d5 HG |
513 | /* |
514 | * Begin non sysfs callback code (aka Real code) | |
515 | */ | |
516 | ||
517 | static void tmp401_init_client(struct i2c_client *client) | |
518 | { | |
519 | int config, config_orig; | |
520 | ||
521 | /* Set the conversion rate to 2 Hz */ | |
522 | i2c_smbus_write_byte_data(client, TMP401_CONVERSION_RATE_WRITE, 5); | |
523 | ||
524 | /* Start conversions (disable shutdown if necessary) */ | |
525 | config = i2c_smbus_read_byte_data(client, TMP401_CONFIG_READ); | |
526 | if (config < 0) { | |
527 | dev_warn(&client->dev, "Initialization failed!\n"); | |
528 | return; | |
529 | } | |
530 | ||
531 | config_orig = config; | |
532 | config &= ~TMP401_CONFIG_SHUTDOWN; | |
533 | ||
534 | if (config != config_orig) | |
535 | i2c_smbus_write_byte_data(client, TMP401_CONFIG_WRITE, config); | |
536 | } | |
537 | ||
310ec792 | 538 | static int tmp401_detect(struct i2c_client *client, |
ab2b79d5 HG |
539 | struct i2c_board_info *info) |
540 | { | |
dbe73c8f | 541 | enum chips kind; |
ab2b79d5 | 542 | struct i2c_adapter *adapter = client->adapter; |
dbe73c8f | 543 | u8 reg; |
ab2b79d5 HG |
544 | |
545 | if (!i2c_check_functionality(adapter, I2C_FUNC_SMBUS_BYTE_DATA)) | |
546 | return -ENODEV; | |
547 | ||
548 | /* Detect and identify the chip */ | |
dbe73c8f JD |
549 | reg = i2c_smbus_read_byte_data(client, TMP401_MANUFACTURER_ID_REG); |
550 | if (reg != TMP401_MANUFACTURER_ID) | |
551 | return -ENODEV; | |
ab2b79d5 | 552 | |
dbe73c8f | 553 | reg = i2c_smbus_read_byte_data(client, TMP401_DEVICE_ID_REG); |
ab2b79d5 | 554 | |
dbe73c8f JD |
555 | switch (reg) { |
556 | case TMP401_DEVICE_ID: | |
557 | kind = tmp401; | |
558 | break; | |
559 | case TMP411_DEVICE_ID: | |
560 | kind = tmp411; | |
561 | break; | |
562 | default: | |
563 | return -ENODEV; | |
ab2b79d5 | 564 | } |
dbe73c8f JD |
565 | |
566 | reg = i2c_smbus_read_byte_data(client, TMP401_CONFIG_READ); | |
567 | if (reg & 0x1b) | |
568 | return -ENODEV; | |
569 | ||
570 | reg = i2c_smbus_read_byte_data(client, TMP401_CONVERSION_RATE_READ); | |
571 | /* Datasheet says: 0x1-0x6 */ | |
572 | if (reg > 15) | |
573 | return -ENODEV; | |
574 | ||
dc71afe5 | 575 | strlcpy(info->type, tmp401_id[kind].name, I2C_NAME_SIZE); |
ab2b79d5 HG |
576 | |
577 | return 0; | |
578 | } | |
579 | ||
ea63c2b9 AP |
580 | static int tmp401_remove(struct i2c_client *client) |
581 | { | |
582 | struct tmp401_data *data = i2c_get_clientdata(client); | |
583 | int i; | |
584 | ||
585 | if (data->hwmon_dev) | |
586 | hwmon_device_unregister(data->hwmon_dev); | |
587 | ||
588 | for (i = 0; i < ARRAY_SIZE(tmp401_attr); i++) | |
589 | device_remove_file(&client->dev, &tmp401_attr[i].dev_attr); | |
590 | ||
591 | if (data->kind == tmp411) { | |
592 | for (i = 0; i < ARRAY_SIZE(tmp411_attr); i++) | |
593 | device_remove_file(&client->dev, | |
594 | &tmp411_attr[i].dev_attr); | |
595 | } | |
596 | ||
597 | kfree(data); | |
598 | return 0; | |
599 | } | |
600 | ||
ab2b79d5 HG |
601 | static int tmp401_probe(struct i2c_client *client, |
602 | const struct i2c_device_id *id) | |
603 | { | |
604 | int i, err = 0; | |
605 | struct tmp401_data *data; | |
fce0758f | 606 | const char *names[] = { "TMP401", "TMP411" }; |
ab2b79d5 HG |
607 | |
608 | data = kzalloc(sizeof(struct tmp401_data), GFP_KERNEL); | |
609 | if (!data) | |
610 | return -ENOMEM; | |
611 | ||
612 | i2c_set_clientdata(client, data); | |
613 | mutex_init(&data->update_lock); | |
fce0758f | 614 | data->kind = id->driver_data; |
ab2b79d5 HG |
615 | |
616 | /* Initialize the TMP401 chip */ | |
617 | tmp401_init_client(client); | |
618 | ||
619 | /* Register sysfs hooks */ | |
620 | for (i = 0; i < ARRAY_SIZE(tmp401_attr); i++) { | |
621 | err = device_create_file(&client->dev, | |
622 | &tmp401_attr[i].dev_attr); | |
623 | if (err) | |
624 | goto exit_remove; | |
625 | } | |
626 | ||
fce0758f AP |
627 | /* Register aditional tmp411 sysfs hooks */ |
628 | if (data->kind == tmp411) { | |
629 | for (i = 0; i < ARRAY_SIZE(tmp411_attr); i++) { | |
630 | err = device_create_file(&client->dev, | |
631 | &tmp411_attr[i].dev_attr); | |
632 | if (err) | |
633 | goto exit_remove; | |
634 | } | |
635 | } | |
636 | ||
ab2b79d5 HG |
637 | data->hwmon_dev = hwmon_device_register(&client->dev); |
638 | if (IS_ERR(data->hwmon_dev)) { | |
639 | err = PTR_ERR(data->hwmon_dev); | |
640 | data->hwmon_dev = NULL; | |
641 | goto exit_remove; | |
642 | } | |
643 | ||
dc71afe5 | 644 | dev_info(&client->dev, "Detected TI %s chip\n", names[data->kind]); |
ab2b79d5 HG |
645 | |
646 | return 0; | |
647 | ||
648 | exit_remove: | |
649 | tmp401_remove(client); /* will also free data for us */ | |
650 | return err; | |
651 | } | |
652 | ||
ea63c2b9 AP |
653 | static struct i2c_driver tmp401_driver = { |
654 | .class = I2C_CLASS_HWMON, | |
655 | .driver = { | |
656 | .name = "tmp401", | |
657 | }, | |
658 | .probe = tmp401_probe, | |
659 | .remove = tmp401_remove, | |
660 | .id_table = tmp401_id, | |
661 | .detect = tmp401_detect, | |
662 | .address_list = normal_i2c, | |
663 | }; | |
ab2b79d5 HG |
664 | |
665 | static int __init tmp401_init(void) | |
666 | { | |
667 | return i2c_add_driver(&tmp401_driver); | |
668 | } | |
669 | ||
670 | static void __exit tmp401_exit(void) | |
671 | { | |
672 | i2c_del_driver(&tmp401_driver); | |
673 | } | |
674 | ||
675 | MODULE_AUTHOR("Hans de Goede <hdegoede@redhat.com>"); | |
676 | MODULE_DESCRIPTION("Texas Instruments TMP401 temperature sensor driver"); | |
677 | MODULE_LICENSE("GPL"); | |
678 | ||
679 | module_init(tmp401_init); | |
680 | module_exit(tmp401_exit); |