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3434f378 GR |
1 | /* |
2 | * nct7802 - Driver for Nuvoton NCT7802Y | |
3 | * | |
4 | * Copyright (C) 2014 Guenter Roeck <linux@roeck-us.net> | |
5 | * | |
6 | * This program is free software; you can redistribute it and/or modify | |
7 | * it under the terms of the GNU General Public License as published by | |
8 | * the Free Software Foundation; either version 2 of the License, or | |
9 | * (at your option) any later version. | |
10 | * | |
11 | * This program is distributed in the hope that it will be useful, | |
12 | * but WITHOUT ANY WARRANTY; without even the implied warranty of | |
13 | * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the | |
14 | * GNU General Public License for more details. | |
15 | */ | |
16 | ||
17 | #define pr_fmt(fmt) KBUILD_MODNAME ": " fmt | |
18 | ||
19 | #include <linux/err.h> | |
20 | #include <linux/i2c.h> | |
21 | #include <linux/init.h> | |
22 | #include <linux/hwmon.h> | |
23 | #include <linux/hwmon-sysfs.h> | |
24 | #include <linux/jiffies.h> | |
25 | #include <linux/module.h> | |
26 | #include <linux/mutex.h> | |
27 | #include <linux/regmap.h> | |
28 | #include <linux/slab.h> | |
29 | ||
30 | #define DRVNAME "nct7802" | |
31 | ||
32 | static const u8 REG_VOLTAGE[5] = { 0x09, 0x0a, 0x0c, 0x0d, 0x0e }; | |
33 | ||
34 | static const u8 REG_VOLTAGE_LIMIT_LSB[2][5] = { | |
35 | { 0x40, 0x00, 0x42, 0x44, 0x46 }, | |
36 | { 0x3f, 0x00, 0x41, 0x43, 0x45 }, | |
37 | }; | |
38 | ||
39 | static const u8 REG_VOLTAGE_LIMIT_MSB[5] = { 0x48, 0x00, 0x47, 0x47, 0x48 }; | |
40 | ||
41 | static const u8 REG_VOLTAGE_LIMIT_MSB_SHIFT[2][5] = { | |
42 | { 0, 0, 4, 0, 4 }, | |
43 | { 2, 0, 6, 2, 6 }, | |
44 | }; | |
45 | ||
46 | #define REG_BANK 0x00 | |
47 | #define REG_TEMP_LSB 0x05 | |
48 | #define REG_TEMP_PECI_LSB 0x08 | |
49 | #define REG_VOLTAGE_LOW 0x0f | |
50 | #define REG_FANCOUNT_LOW 0x13 | |
51 | #define REG_START 0x21 | |
52 | #define REG_MODE 0x22 | |
53 | #define REG_PECI_ENABLE 0x23 | |
54 | #define REG_FAN_ENABLE 0x24 | |
55 | #define REG_VMON_ENABLE 0x25 | |
56 | #define REG_VENDOR_ID 0xfd | |
57 | #define REG_CHIP_ID 0xfe | |
58 | #define REG_VERSION_ID 0xff | |
59 | ||
60 | /* | |
61 | * Data structures and manipulation thereof | |
62 | */ | |
63 | ||
64 | struct nct7802_data { | |
65 | struct regmap *regmap; | |
66 | struct mutex access_lock; /* for multi-byte read and write operations */ | |
67 | }; | |
68 | ||
69 | static int nct7802_read_temp(struct nct7802_data *data, | |
70 | u8 reg_temp, u8 reg_temp_low, int *temp) | |
71 | { | |
72 | unsigned int t1, t2 = 0; | |
73 | int err; | |
74 | ||
75 | *temp = 0; | |
76 | ||
77 | mutex_lock(&data->access_lock); | |
78 | err = regmap_read(data->regmap, reg_temp, &t1); | |
79 | if (err < 0) | |
80 | goto abort; | |
81 | t1 <<= 8; | |
82 | if (reg_temp_low) { /* 11 bit data */ | |
83 | err = regmap_read(data->regmap, reg_temp_low, &t2); | |
84 | if (err < 0) | |
85 | goto abort; | |
86 | } | |
87 | t1 |= t2 & 0xe0; | |
88 | *temp = (s16)t1 / 32 * 125; | |
89 | abort: | |
90 | mutex_unlock(&data->access_lock); | |
91 | return err; | |
92 | } | |
93 | ||
94 | static int nct7802_read_fan(struct nct7802_data *data, u8 reg_fan) | |
95 | { | |
96 | unsigned int f1, f2; | |
97 | int ret; | |
98 | ||
99 | mutex_lock(&data->access_lock); | |
100 | ret = regmap_read(data->regmap, reg_fan, &f1); | |
101 | if (ret < 0) | |
102 | goto abort; | |
103 | ret = regmap_read(data->regmap, REG_FANCOUNT_LOW, &f2); | |
104 | if (ret < 0) | |
105 | goto abort; | |
106 | ret = (f1 << 5) | (f2 >> 3); | |
107 | /* convert fan count to rpm */ | |
108 | if (ret == 0x1fff) /* maximum value, assume fan is stopped */ | |
109 | ret = 0; | |
110 | else if (ret) | |
111 | ret = DIV_ROUND_CLOSEST(1350000U, ret); | |
112 | abort: | |
113 | mutex_unlock(&data->access_lock); | |
114 | return ret; | |
115 | } | |
116 | ||
117 | static int nct7802_read_fan_min(struct nct7802_data *data, u8 reg_fan_low, | |
118 | u8 reg_fan_high) | |
119 | { | |
120 | unsigned int f1, f2; | |
121 | int ret; | |
122 | ||
123 | mutex_lock(&data->access_lock); | |
124 | ret = regmap_read(data->regmap, reg_fan_low, &f1); | |
125 | if (ret < 0) | |
126 | goto abort; | |
127 | ret = regmap_read(data->regmap, reg_fan_high, &f2); | |
128 | if (ret < 0) | |
129 | goto abort; | |
130 | ret = f1 | ((f2 & 0xf8) << 5); | |
131 | /* convert fan count to rpm */ | |
132 | if (ret == 0x1fff) /* maximum value, assume no limit */ | |
133 | ret = 0; | |
134 | else if (ret) | |
135 | ret = DIV_ROUND_CLOSEST(1350000U, ret); | |
136 | abort: | |
137 | mutex_unlock(&data->access_lock); | |
138 | return ret; | |
139 | } | |
140 | ||
141 | static int nct7802_write_fan_min(struct nct7802_data *data, u8 reg_fan_low, | |
142 | u8 reg_fan_high, unsigned int limit) | |
143 | { | |
144 | int err; | |
145 | ||
146 | if (limit) | |
147 | limit = DIV_ROUND_CLOSEST(1350000U, limit); | |
148 | else | |
149 | limit = 0x1fff; | |
150 | limit = clamp_val(limit, 0, 0x1fff); | |
151 | ||
152 | mutex_lock(&data->access_lock); | |
153 | err = regmap_write(data->regmap, reg_fan_low, limit & 0xff); | |
154 | if (err < 0) | |
155 | goto abort; | |
156 | ||
157 | err = regmap_write(data->regmap, reg_fan_high, (limit & 0x1f00) >> 5); | |
158 | abort: | |
159 | mutex_unlock(&data->access_lock); | |
160 | return err; | |
161 | } | |
162 | ||
163 | static u8 nct7802_vmul[] = { 4, 2, 2, 2, 2 }; | |
164 | ||
165 | static int nct7802_read_voltage(struct nct7802_data *data, int nr, int index) | |
166 | { | |
167 | unsigned int v1, v2; | |
168 | int ret; | |
169 | ||
170 | mutex_lock(&data->access_lock); | |
171 | if (index == 0) { /* voltage */ | |
172 | ret = regmap_read(data->regmap, REG_VOLTAGE[nr], &v1); | |
173 | if (ret < 0) | |
174 | goto abort; | |
175 | ret = regmap_read(data->regmap, REG_VOLTAGE_LOW, &v2); | |
176 | if (ret < 0) | |
177 | goto abort; | |
178 | ret = ((v1 << 2) | (v2 >> 6)) * nct7802_vmul[nr]; | |
179 | } else { /* limit */ | |
180 | int shift = 8 - REG_VOLTAGE_LIMIT_MSB_SHIFT[index - 1][nr]; | |
181 | ||
182 | ret = regmap_read(data->regmap, | |
183 | REG_VOLTAGE_LIMIT_LSB[index - 1][nr], &v1); | |
184 | if (ret < 0) | |
185 | goto abort; | |
186 | ret = regmap_read(data->regmap, REG_VOLTAGE_LIMIT_MSB[nr], | |
187 | &v2); | |
188 | if (ret < 0) | |
189 | goto abort; | |
190 | ret = (v1 | ((v2 << shift) & 0x300)) * nct7802_vmul[nr]; | |
191 | } | |
192 | abort: | |
193 | mutex_unlock(&data->access_lock); | |
194 | return ret; | |
195 | } | |
196 | ||
197 | static int nct7802_write_voltage(struct nct7802_data *data, int nr, int index, | |
9200bc4c | 198 | unsigned long voltage) |
3434f378 GR |
199 | { |
200 | int shift = 8 - REG_VOLTAGE_LIMIT_MSB_SHIFT[index - 1][nr]; | |
201 | int err; | |
202 | ||
203 | voltage = DIV_ROUND_CLOSEST(voltage, nct7802_vmul[nr]); | |
204 | voltage = clamp_val(voltage, 0, 0x3ff); | |
205 | ||
206 | mutex_lock(&data->access_lock); | |
207 | err = regmap_write(data->regmap, | |
208 | REG_VOLTAGE_LIMIT_LSB[index - 1][nr], | |
209 | voltage & 0xff); | |
210 | if (err < 0) | |
211 | goto abort; | |
212 | ||
213 | err = regmap_update_bits(data->regmap, REG_VOLTAGE_LIMIT_MSB[nr], | |
214 | 0x0300 >> shift, (voltage & 0x0300) >> shift); | |
215 | abort: | |
216 | mutex_unlock(&data->access_lock); | |
217 | return err; | |
218 | } | |
219 | ||
220 | static ssize_t show_in(struct device *dev, struct device_attribute *attr, | |
221 | char *buf) | |
222 | { | |
223 | struct sensor_device_attribute_2 *sattr = to_sensor_dev_attr_2(attr); | |
224 | struct nct7802_data *data = dev_get_drvdata(dev); | |
225 | int voltage; | |
226 | ||
227 | voltage = nct7802_read_voltage(data, sattr->nr, sattr->index); | |
228 | if (voltage < 0) | |
229 | return voltage; | |
230 | ||
231 | return sprintf(buf, "%d\n", voltage); | |
232 | } | |
233 | ||
234 | static ssize_t store_in(struct device *dev, struct device_attribute *attr, | |
235 | const char *buf, size_t count) | |
236 | { | |
237 | struct sensor_device_attribute_2 *sattr = to_sensor_dev_attr_2(attr); | |
238 | struct nct7802_data *data = dev_get_drvdata(dev); | |
239 | int index = sattr->index; | |
240 | int nr = sattr->nr; | |
241 | unsigned long val; | |
242 | int err; | |
243 | ||
244 | err = kstrtoul(buf, 10, &val); | |
245 | if (err < 0) | |
246 | return err; | |
247 | ||
248 | err = nct7802_write_voltage(data, nr, index, val); | |
249 | return err ? : count; | |
250 | } | |
251 | ||
252 | static ssize_t show_temp(struct device *dev, struct device_attribute *attr, | |
253 | char *buf) | |
254 | { | |
255 | struct nct7802_data *data = dev_get_drvdata(dev); | |
256 | struct sensor_device_attribute_2 *sattr = to_sensor_dev_attr_2(attr); | |
257 | int err, temp; | |
258 | ||
259 | err = nct7802_read_temp(data, sattr->nr, sattr->index, &temp); | |
260 | if (err < 0) | |
261 | return err; | |
262 | ||
263 | return sprintf(buf, "%d\n", temp); | |
264 | } | |
265 | ||
266 | static ssize_t store_temp(struct device *dev, struct device_attribute *attr, | |
267 | const char *buf, size_t count) | |
268 | { | |
269 | struct sensor_device_attribute_2 *sattr = to_sensor_dev_attr_2(attr); | |
270 | struct nct7802_data *data = dev_get_drvdata(dev); | |
271 | int nr = sattr->nr; | |
272 | long val; | |
273 | int err; | |
274 | ||
275 | err = kstrtol(buf, 10, &val); | |
276 | if (err < 0) | |
277 | return err; | |
278 | ||
279 | val = clamp_val(DIV_ROUND_CLOSEST(val, 1000), -128, 127); | |
280 | ||
281 | err = regmap_write(data->regmap, nr, val & 0xff); | |
282 | return err ? : count; | |
283 | } | |
284 | ||
285 | static ssize_t show_fan(struct device *dev, struct device_attribute *attr, | |
286 | char *buf) | |
287 | { | |
288 | struct sensor_device_attribute *sattr = to_sensor_dev_attr(attr); | |
289 | struct nct7802_data *data = dev_get_drvdata(dev); | |
290 | int speed; | |
291 | ||
292 | speed = nct7802_read_fan(data, sattr->index); | |
293 | if (speed < 0) | |
294 | return speed; | |
295 | ||
296 | return sprintf(buf, "%d\n", speed); | |
297 | } | |
298 | ||
299 | static ssize_t show_fan_min(struct device *dev, struct device_attribute *attr, | |
300 | char *buf) | |
301 | { | |
302 | struct sensor_device_attribute_2 *sattr = to_sensor_dev_attr_2(attr); | |
303 | struct nct7802_data *data = dev_get_drvdata(dev); | |
304 | int speed; | |
305 | ||
306 | speed = nct7802_read_fan_min(data, sattr->nr, sattr->index); | |
307 | if (speed < 0) | |
308 | return speed; | |
309 | ||
310 | return sprintf(buf, "%d\n", speed); | |
311 | } | |
312 | ||
313 | static ssize_t store_fan_min(struct device *dev, struct device_attribute *attr, | |
314 | const char *buf, size_t count) | |
315 | { | |
316 | struct sensor_device_attribute_2 *sattr = to_sensor_dev_attr_2(attr); | |
317 | struct nct7802_data *data = dev_get_drvdata(dev); | |
318 | unsigned long val; | |
319 | int err; | |
320 | ||
321 | err = kstrtoul(buf, 10, &val); | |
322 | if (err < 0) | |
323 | return err; | |
324 | ||
325 | err = nct7802_write_fan_min(data, sattr->nr, sattr->index, val); | |
326 | return err ? : count; | |
327 | } | |
328 | ||
329 | static ssize_t show_alarm(struct device *dev, struct device_attribute *attr, | |
330 | char *buf) | |
331 | { | |
332 | struct nct7802_data *data = dev_get_drvdata(dev); | |
333 | struct sensor_device_attribute_2 *sattr = to_sensor_dev_attr_2(attr); | |
334 | int bit = sattr->index; | |
335 | unsigned int val; | |
336 | int ret; | |
337 | ||
338 | ret = regmap_read(data->regmap, sattr->nr, &val); | |
339 | if (ret < 0) | |
340 | return ret; | |
341 | ||
342 | return sprintf(buf, "%u\n", !!(val & (1 << bit))); | |
343 | } | |
344 | ||
345 | static ssize_t | |
346 | show_beep(struct device *dev, struct device_attribute *attr, char *buf) | |
347 | { | |
348 | struct sensor_device_attribute_2 *sattr = to_sensor_dev_attr_2(attr); | |
349 | struct nct7802_data *data = dev_get_drvdata(dev); | |
350 | unsigned int regval; | |
351 | int err; | |
352 | ||
353 | err = regmap_read(data->regmap, sattr->nr, ®val); | |
354 | if (err) | |
355 | return err; | |
356 | ||
357 | return sprintf(buf, "%u\n", !!(regval & (1 << sattr->index))); | |
358 | } | |
359 | ||
360 | static ssize_t | |
361 | store_beep(struct device *dev, struct device_attribute *attr, const char *buf, | |
362 | size_t count) | |
363 | { | |
364 | struct sensor_device_attribute_2 *sattr = to_sensor_dev_attr_2(attr); | |
365 | struct nct7802_data *data = dev_get_drvdata(dev); | |
366 | unsigned long val; | |
367 | int err; | |
368 | ||
369 | err = kstrtoul(buf, 10, &val); | |
370 | if (err < 0) | |
371 | return err; | |
372 | if (val > 1) | |
373 | return -EINVAL; | |
374 | ||
375 | err = regmap_update_bits(data->regmap, sattr->nr, 1 << sattr->index, | |
376 | val ? 1 << sattr->index : 0); | |
377 | return err ? : count; | |
378 | } | |
379 | ||
380 | static SENSOR_DEVICE_ATTR_2(temp1_input, S_IRUGO, show_temp, NULL, 0x01, | |
381 | REG_TEMP_LSB); | |
382 | static SENSOR_DEVICE_ATTR_2(temp1_min, S_IRUGO | S_IWUSR, show_temp, | |
383 | store_temp, 0x31, 0); | |
384 | static SENSOR_DEVICE_ATTR_2(temp1_max, S_IRUGO | S_IWUSR, show_temp, | |
385 | store_temp, 0x30, 0); | |
386 | static SENSOR_DEVICE_ATTR_2(temp1_crit, S_IRUGO | S_IWUSR, show_temp, | |
387 | store_temp, 0x3a, 0); | |
388 | ||
389 | static SENSOR_DEVICE_ATTR_2(temp2_input, S_IRUGO, show_temp, NULL, 0x02, | |
390 | REG_TEMP_LSB); | |
391 | static SENSOR_DEVICE_ATTR_2(temp2_min, S_IRUGO | S_IWUSR, show_temp, | |
392 | store_temp, 0x33, 0); | |
393 | static SENSOR_DEVICE_ATTR_2(temp2_max, S_IRUGO | S_IWUSR, show_temp, | |
394 | store_temp, 0x32, 0); | |
395 | static SENSOR_DEVICE_ATTR_2(temp2_crit, S_IRUGO | S_IWUSR, show_temp, | |
396 | store_temp, 0x3b, 0); | |
397 | ||
398 | static SENSOR_DEVICE_ATTR_2(temp3_input, S_IRUGO, show_temp, NULL, 0x03, | |
399 | REG_TEMP_LSB); | |
400 | static SENSOR_DEVICE_ATTR_2(temp3_min, S_IRUGO | S_IWUSR, show_temp, | |
401 | store_temp, 0x35, 0); | |
402 | static SENSOR_DEVICE_ATTR_2(temp3_max, S_IRUGO | S_IWUSR, show_temp, | |
403 | store_temp, 0x34, 0); | |
404 | static SENSOR_DEVICE_ATTR_2(temp3_crit, S_IRUGO | S_IWUSR, show_temp, | |
405 | store_temp, 0x3c, 0); | |
406 | ||
407 | static SENSOR_DEVICE_ATTR_2(temp4_input, S_IRUGO, show_temp, NULL, 0x04, 0); | |
408 | static SENSOR_DEVICE_ATTR_2(temp4_min, S_IRUGO | S_IWUSR, show_temp, | |
409 | store_temp, 0x37, 0); | |
410 | static SENSOR_DEVICE_ATTR_2(temp4_max, S_IRUGO | S_IWUSR, show_temp, | |
411 | store_temp, 0x36, 0); | |
412 | static SENSOR_DEVICE_ATTR_2(temp4_crit, S_IRUGO | S_IWUSR, show_temp, | |
413 | store_temp, 0x3d, 0); | |
414 | ||
415 | static SENSOR_DEVICE_ATTR_2(temp5_input, S_IRUGO, show_temp, NULL, 0x06, | |
416 | REG_TEMP_PECI_LSB); | |
417 | static SENSOR_DEVICE_ATTR_2(temp5_min, S_IRUGO | S_IWUSR, show_temp, | |
418 | store_temp, 0x39, 0); | |
419 | static SENSOR_DEVICE_ATTR_2(temp5_max, S_IRUGO | S_IWUSR, show_temp, | |
420 | store_temp, 0x38, 0); | |
421 | static SENSOR_DEVICE_ATTR_2(temp5_crit, S_IRUGO | S_IWUSR, show_temp, | |
422 | store_temp, 0x3e, 0); | |
423 | ||
424 | static SENSOR_DEVICE_ATTR_2(temp6_input, S_IRUGO, show_temp, NULL, 0x07, | |
425 | REG_TEMP_PECI_LSB); | |
426 | ||
427 | static SENSOR_DEVICE_ATTR_2(temp1_min_alarm, S_IRUGO, show_alarm, NULL, | |
428 | 0x18, 0); | |
429 | static SENSOR_DEVICE_ATTR_2(temp2_min_alarm, S_IRUGO, show_alarm, NULL, | |
430 | 0x18, 1); | |
431 | static SENSOR_DEVICE_ATTR_2(temp3_min_alarm, S_IRUGO, show_alarm, NULL, | |
432 | 0x18, 2); | |
433 | static SENSOR_DEVICE_ATTR_2(temp4_min_alarm, S_IRUGO, show_alarm, NULL, | |
434 | 0x18, 3); | |
435 | static SENSOR_DEVICE_ATTR_2(temp5_min_alarm, S_IRUGO, show_alarm, NULL, | |
436 | 0x18, 4); | |
437 | ||
438 | static SENSOR_DEVICE_ATTR_2(temp1_max_alarm, S_IRUGO, show_alarm, NULL, | |
439 | 0x19, 0); | |
440 | static SENSOR_DEVICE_ATTR_2(temp2_max_alarm, S_IRUGO, show_alarm, NULL, | |
441 | 0x19, 1); | |
442 | static SENSOR_DEVICE_ATTR_2(temp3_max_alarm, S_IRUGO, show_alarm, NULL, | |
443 | 0x19, 2); | |
444 | static SENSOR_DEVICE_ATTR_2(temp4_max_alarm, S_IRUGO, show_alarm, NULL, | |
445 | 0x19, 3); | |
446 | static SENSOR_DEVICE_ATTR_2(temp5_max_alarm, S_IRUGO, show_alarm, NULL, | |
447 | 0x19, 4); | |
448 | ||
449 | static SENSOR_DEVICE_ATTR_2(temp1_crit_alarm, S_IRUGO, show_alarm, NULL, | |
450 | 0x1b, 0); | |
451 | static SENSOR_DEVICE_ATTR_2(temp2_crit_alarm, S_IRUGO, show_alarm, NULL, | |
452 | 0x1b, 1); | |
453 | static SENSOR_DEVICE_ATTR_2(temp3_crit_alarm, S_IRUGO, show_alarm, NULL, | |
454 | 0x1b, 2); | |
455 | static SENSOR_DEVICE_ATTR_2(temp4_crit_alarm, S_IRUGO, show_alarm, NULL, | |
456 | 0x1b, 3); | |
457 | static SENSOR_DEVICE_ATTR_2(temp5_crit_alarm, S_IRUGO, show_alarm, NULL, | |
458 | 0x1b, 4); | |
459 | ||
460 | static SENSOR_DEVICE_ATTR_2(temp1_fault, S_IRUGO, show_alarm, NULL, 0x17, 0); | |
461 | static SENSOR_DEVICE_ATTR_2(temp2_fault, S_IRUGO, show_alarm, NULL, 0x17, 1); | |
462 | static SENSOR_DEVICE_ATTR_2(temp3_fault, S_IRUGO, show_alarm, NULL, 0x17, 2); | |
463 | ||
464 | static SENSOR_DEVICE_ATTR_2(temp1_beep, S_IRUGO | S_IWUSR, show_beep, | |
465 | store_beep, 0x5c, 0); | |
466 | static SENSOR_DEVICE_ATTR_2(temp2_beep, S_IRUGO | S_IWUSR, show_beep, | |
467 | store_beep, 0x5c, 1); | |
468 | static SENSOR_DEVICE_ATTR_2(temp3_beep, S_IRUGO | S_IWUSR, show_beep, | |
469 | store_beep, 0x5c, 2); | |
470 | static SENSOR_DEVICE_ATTR_2(temp4_beep, S_IRUGO | S_IWUSR, show_beep, | |
471 | store_beep, 0x5c, 3); | |
472 | static SENSOR_DEVICE_ATTR_2(temp5_beep, S_IRUGO | S_IWUSR, show_beep, | |
473 | store_beep, 0x5c, 4); | |
474 | static SENSOR_DEVICE_ATTR_2(temp6_beep, S_IRUGO | S_IWUSR, show_beep, | |
475 | store_beep, 0x5c, 5); | |
476 | ||
477 | static struct attribute *nct7802_temp_attrs[] = { | |
478 | &sensor_dev_attr_temp1_input.dev_attr.attr, | |
479 | &sensor_dev_attr_temp1_min.dev_attr.attr, | |
480 | &sensor_dev_attr_temp1_max.dev_attr.attr, | |
481 | &sensor_dev_attr_temp1_crit.dev_attr.attr, | |
482 | &sensor_dev_attr_temp1_min_alarm.dev_attr.attr, | |
483 | &sensor_dev_attr_temp1_max_alarm.dev_attr.attr, | |
484 | &sensor_dev_attr_temp1_crit_alarm.dev_attr.attr, | |
485 | &sensor_dev_attr_temp1_fault.dev_attr.attr, | |
486 | &sensor_dev_attr_temp1_beep.dev_attr.attr, | |
487 | ||
488 | &sensor_dev_attr_temp2_input.dev_attr.attr, /* 9 */ | |
489 | &sensor_dev_attr_temp2_min.dev_attr.attr, | |
490 | &sensor_dev_attr_temp2_max.dev_attr.attr, | |
491 | &sensor_dev_attr_temp2_crit.dev_attr.attr, | |
492 | &sensor_dev_attr_temp2_min_alarm.dev_attr.attr, | |
493 | &sensor_dev_attr_temp2_max_alarm.dev_attr.attr, | |
494 | &sensor_dev_attr_temp2_crit_alarm.dev_attr.attr, | |
495 | &sensor_dev_attr_temp2_fault.dev_attr.attr, | |
496 | &sensor_dev_attr_temp2_beep.dev_attr.attr, | |
497 | ||
498 | &sensor_dev_attr_temp3_input.dev_attr.attr, /* 18 */ | |
499 | &sensor_dev_attr_temp3_min.dev_attr.attr, | |
500 | &sensor_dev_attr_temp3_max.dev_attr.attr, | |
501 | &sensor_dev_attr_temp3_crit.dev_attr.attr, | |
502 | &sensor_dev_attr_temp3_min_alarm.dev_attr.attr, | |
503 | &sensor_dev_attr_temp3_max_alarm.dev_attr.attr, | |
504 | &sensor_dev_attr_temp3_crit_alarm.dev_attr.attr, | |
505 | &sensor_dev_attr_temp3_fault.dev_attr.attr, | |
506 | &sensor_dev_attr_temp3_beep.dev_attr.attr, | |
507 | ||
508 | &sensor_dev_attr_temp4_input.dev_attr.attr, /* 27 */ | |
509 | &sensor_dev_attr_temp4_min.dev_attr.attr, | |
510 | &sensor_dev_attr_temp4_max.dev_attr.attr, | |
511 | &sensor_dev_attr_temp4_crit.dev_attr.attr, | |
512 | &sensor_dev_attr_temp4_min_alarm.dev_attr.attr, | |
513 | &sensor_dev_attr_temp4_max_alarm.dev_attr.attr, | |
514 | &sensor_dev_attr_temp4_crit_alarm.dev_attr.attr, | |
515 | &sensor_dev_attr_temp4_beep.dev_attr.attr, | |
516 | ||
517 | &sensor_dev_attr_temp5_input.dev_attr.attr, /* 35 */ | |
518 | &sensor_dev_attr_temp5_min.dev_attr.attr, | |
519 | &sensor_dev_attr_temp5_max.dev_attr.attr, | |
520 | &sensor_dev_attr_temp5_crit.dev_attr.attr, | |
521 | &sensor_dev_attr_temp5_min_alarm.dev_attr.attr, | |
522 | &sensor_dev_attr_temp5_max_alarm.dev_attr.attr, | |
523 | &sensor_dev_attr_temp5_crit_alarm.dev_attr.attr, | |
524 | &sensor_dev_attr_temp5_beep.dev_attr.attr, | |
525 | ||
526 | &sensor_dev_attr_temp6_input.dev_attr.attr, /* 43 */ | |
527 | &sensor_dev_attr_temp6_beep.dev_attr.attr, | |
528 | ||
529 | NULL | |
530 | }; | |
531 | ||
532 | static umode_t nct7802_temp_is_visible(struct kobject *kobj, | |
533 | struct attribute *attr, int index) | |
534 | { | |
535 | struct device *dev = container_of(kobj, struct device, kobj); | |
536 | struct nct7802_data *data = dev_get_drvdata(dev); | |
537 | unsigned int reg; | |
538 | int err; | |
539 | ||
540 | err = regmap_read(data->regmap, REG_MODE, ®); | |
541 | if (err < 0) | |
542 | return 0; | |
543 | ||
544 | if (index < 9 && | |
545 | (reg & 03) != 0x01 && (reg & 0x03) != 0x02) /* RD1 */ | |
546 | return 0; | |
547 | if (index >= 9 && index < 18 && | |
548 | (reg & 0x0c) != 0x04 && (reg & 0x0c) != 0x08) /* RD2 */ | |
549 | return 0; | |
56172d81 | 550 | if (index >= 18 && index < 27 && (reg & 0x30) != 0x20) /* RD3 */ |
3434f378 GR |
551 | return 0; |
552 | if (index >= 27 && index < 35) /* local */ | |
553 | return attr->mode; | |
554 | ||
555 | err = regmap_read(data->regmap, REG_PECI_ENABLE, ®); | |
556 | if (err < 0) | |
557 | return 0; | |
558 | ||
559 | if (index >= 35 && index < 43 && !(reg & 0x01)) /* PECI 0 */ | |
560 | return 0; | |
561 | ||
562 | if (index >= 0x43 && (!(reg & 0x02))) /* PECI 1 */ | |
563 | return 0; | |
564 | ||
565 | return attr->mode; | |
566 | } | |
567 | ||
568 | static struct attribute_group nct7802_temp_group = { | |
569 | .attrs = nct7802_temp_attrs, | |
570 | .is_visible = nct7802_temp_is_visible, | |
571 | }; | |
572 | ||
573 | static SENSOR_DEVICE_ATTR_2(in0_input, S_IRUGO, show_in, NULL, 0, 0); | |
574 | static SENSOR_DEVICE_ATTR_2(in0_min, S_IRUGO | S_IWUSR, show_in, store_in, | |
575 | 0, 1); | |
576 | static SENSOR_DEVICE_ATTR_2(in0_max, S_IRUGO | S_IWUSR, show_in, store_in, | |
577 | 0, 2); | |
578 | static SENSOR_DEVICE_ATTR_2(in0_alarm, S_IRUGO, show_alarm, NULL, 0x1e, 3); | |
579 | static SENSOR_DEVICE_ATTR_2(in0_beep, S_IRUGO | S_IWUSR, show_beep, store_beep, | |
580 | 0x5a, 3); | |
581 | ||
582 | static SENSOR_DEVICE_ATTR_2(in1_input, S_IRUGO, show_in, NULL, 1, 0); | |
583 | ||
584 | static SENSOR_DEVICE_ATTR_2(in2_input, S_IRUGO, show_in, NULL, 2, 0); | |
585 | static SENSOR_DEVICE_ATTR_2(in2_min, S_IRUGO | S_IWUSR, show_in, store_in, | |
586 | 2, 1); | |
587 | static SENSOR_DEVICE_ATTR_2(in2_max, S_IRUGO | S_IWUSR, show_in, store_in, | |
588 | 2, 2); | |
589 | static SENSOR_DEVICE_ATTR_2(in2_alarm, S_IRUGO, show_alarm, NULL, 0x1e, 0); | |
590 | static SENSOR_DEVICE_ATTR_2(in2_beep, S_IRUGO | S_IWUSR, show_beep, store_beep, | |
591 | 0x5a, 0); | |
592 | ||
593 | static SENSOR_DEVICE_ATTR_2(in3_input, S_IRUGO, show_in, NULL, 3, 0); | |
594 | static SENSOR_DEVICE_ATTR_2(in3_min, S_IRUGO | S_IWUSR, show_in, store_in, | |
595 | 3, 1); | |
596 | static SENSOR_DEVICE_ATTR_2(in3_max, S_IRUGO | S_IWUSR, show_in, store_in, | |
597 | 3, 2); | |
598 | static SENSOR_DEVICE_ATTR_2(in3_alarm, S_IRUGO, show_alarm, NULL, 0x1e, 1); | |
599 | static SENSOR_DEVICE_ATTR_2(in3_beep, S_IRUGO | S_IWUSR, show_beep, store_beep, | |
600 | 0x5a, 1); | |
601 | ||
602 | static SENSOR_DEVICE_ATTR_2(in4_input, S_IRUGO, show_in, NULL, 4, 0); | |
603 | static SENSOR_DEVICE_ATTR_2(in4_min, S_IRUGO | S_IWUSR, show_in, store_in, | |
604 | 4, 1); | |
605 | static SENSOR_DEVICE_ATTR_2(in4_max, S_IRUGO | S_IWUSR, show_in, store_in, | |
606 | 4, 2); | |
607 | static SENSOR_DEVICE_ATTR_2(in4_alarm, S_IRUGO, show_alarm, NULL, 0x1e, 2); | |
608 | static SENSOR_DEVICE_ATTR_2(in4_beep, S_IRUGO | S_IWUSR, show_beep, store_beep, | |
609 | 0x5a, 2); | |
610 | ||
611 | static struct attribute *nct7802_in_attrs[] = { | |
612 | &sensor_dev_attr_in0_input.dev_attr.attr, | |
613 | &sensor_dev_attr_in0_min.dev_attr.attr, | |
614 | &sensor_dev_attr_in0_max.dev_attr.attr, | |
615 | &sensor_dev_attr_in0_alarm.dev_attr.attr, | |
616 | &sensor_dev_attr_in0_beep.dev_attr.attr, | |
617 | ||
618 | &sensor_dev_attr_in1_input.dev_attr.attr, /* 5 */ | |
619 | ||
620 | &sensor_dev_attr_in2_input.dev_attr.attr, /* 6 */ | |
621 | &sensor_dev_attr_in2_min.dev_attr.attr, | |
622 | &sensor_dev_attr_in2_max.dev_attr.attr, | |
623 | &sensor_dev_attr_in2_alarm.dev_attr.attr, | |
624 | &sensor_dev_attr_in2_beep.dev_attr.attr, | |
625 | ||
626 | &sensor_dev_attr_in3_input.dev_attr.attr, /* 11 */ | |
627 | &sensor_dev_attr_in3_min.dev_attr.attr, | |
628 | &sensor_dev_attr_in3_max.dev_attr.attr, | |
629 | &sensor_dev_attr_in3_alarm.dev_attr.attr, | |
630 | &sensor_dev_attr_in3_beep.dev_attr.attr, | |
631 | ||
632 | &sensor_dev_attr_in4_input.dev_attr.attr, /* 17 */ | |
633 | &sensor_dev_attr_in4_min.dev_attr.attr, | |
634 | &sensor_dev_attr_in4_max.dev_attr.attr, | |
635 | &sensor_dev_attr_in4_alarm.dev_attr.attr, | |
636 | &sensor_dev_attr_in4_beep.dev_attr.attr, | |
637 | ||
638 | NULL, | |
639 | }; | |
640 | ||
641 | static umode_t nct7802_in_is_visible(struct kobject *kobj, | |
642 | struct attribute *attr, int index) | |
643 | { | |
644 | struct device *dev = container_of(kobj, struct device, kobj); | |
645 | struct nct7802_data *data = dev_get_drvdata(dev); | |
646 | unsigned int reg; | |
647 | int err; | |
648 | ||
649 | if (index < 6) /* VCC, VCORE */ | |
650 | return attr->mode; | |
651 | ||
652 | err = regmap_read(data->regmap, REG_MODE, ®); | |
653 | if (err < 0) | |
654 | return 0; | |
655 | ||
656 | if (index >= 6 && index < 11 && (reg & 0x03) != 0x03) /* VSEN1 */ | |
657 | return 0; | |
658 | if (index >= 11 && index < 17 && (reg & 0x0c) != 0x0c) /* VSEN2 */ | |
659 | return 0; | |
660 | if (index >= 17 && (reg & 0x30) != 0x30) /* VSEN3 */ | |
661 | return 0; | |
662 | ||
663 | return attr->mode; | |
664 | } | |
665 | ||
666 | static struct attribute_group nct7802_in_group = { | |
667 | .attrs = nct7802_in_attrs, | |
668 | .is_visible = nct7802_in_is_visible, | |
669 | }; | |
670 | ||
671 | static SENSOR_DEVICE_ATTR(fan1_input, S_IRUGO, show_fan, NULL, 0x10); | |
672 | static SENSOR_DEVICE_ATTR_2(fan1_min, S_IRUGO | S_IWUSR, show_fan_min, | |
673 | store_fan_min, 0x49, 0x4c); | |
674 | static SENSOR_DEVICE_ATTR_2(fan1_alarm, S_IRUGO, show_alarm, NULL, 0x1a, 0); | |
675 | static SENSOR_DEVICE_ATTR_2(fan1_beep, S_IRUGO | S_IWUSR, show_beep, store_beep, | |
676 | 0x5b, 0); | |
677 | static SENSOR_DEVICE_ATTR(fan2_input, S_IRUGO, show_fan, NULL, 0x11); | |
678 | static SENSOR_DEVICE_ATTR_2(fan2_min, S_IRUGO | S_IWUSR, show_fan_min, | |
679 | store_fan_min, 0x4a, 0x4d); | |
680 | static SENSOR_DEVICE_ATTR_2(fan2_alarm, S_IRUGO, show_alarm, NULL, 0x1a, 1); | |
681 | static SENSOR_DEVICE_ATTR_2(fan2_beep, S_IRUGO | S_IWUSR, show_beep, store_beep, | |
682 | 0x5b, 1); | |
683 | static SENSOR_DEVICE_ATTR(fan3_input, S_IRUGO, show_fan, NULL, 0x12); | |
684 | static SENSOR_DEVICE_ATTR_2(fan3_min, S_IRUGO | S_IWUSR, show_fan_min, | |
685 | store_fan_min, 0x4b, 0x4e); | |
686 | static SENSOR_DEVICE_ATTR_2(fan3_alarm, S_IRUGO, show_alarm, NULL, 0x1a, 2); | |
687 | static SENSOR_DEVICE_ATTR_2(fan3_beep, S_IRUGO | S_IWUSR, show_beep, store_beep, | |
688 | 0x5b, 2); | |
689 | ||
690 | static struct attribute *nct7802_fan_attrs[] = { | |
691 | &sensor_dev_attr_fan1_input.dev_attr.attr, | |
692 | &sensor_dev_attr_fan1_min.dev_attr.attr, | |
693 | &sensor_dev_attr_fan1_alarm.dev_attr.attr, | |
694 | &sensor_dev_attr_fan1_beep.dev_attr.attr, | |
695 | &sensor_dev_attr_fan2_input.dev_attr.attr, | |
696 | &sensor_dev_attr_fan2_min.dev_attr.attr, | |
697 | &sensor_dev_attr_fan2_alarm.dev_attr.attr, | |
698 | &sensor_dev_attr_fan2_beep.dev_attr.attr, | |
699 | &sensor_dev_attr_fan3_input.dev_attr.attr, | |
700 | &sensor_dev_attr_fan3_min.dev_attr.attr, | |
701 | &sensor_dev_attr_fan3_alarm.dev_attr.attr, | |
702 | &sensor_dev_attr_fan3_beep.dev_attr.attr, | |
703 | ||
704 | NULL | |
705 | }; | |
706 | ||
707 | static umode_t nct7802_fan_is_visible(struct kobject *kobj, | |
708 | struct attribute *attr, int index) | |
709 | { | |
710 | struct device *dev = container_of(kobj, struct device, kobj); | |
711 | struct nct7802_data *data = dev_get_drvdata(dev); | |
712 | int fan = index / 4; /* 4 attributes per fan */ | |
713 | unsigned int reg; | |
714 | int err; | |
715 | ||
716 | err = regmap_read(data->regmap, REG_FAN_ENABLE, ®); | |
717 | if (err < 0 || !(reg & (1 << fan))) | |
718 | return 0; | |
719 | ||
720 | return attr->mode; | |
721 | } | |
722 | ||
723 | static struct attribute_group nct7802_fan_group = { | |
724 | .attrs = nct7802_fan_attrs, | |
725 | .is_visible = nct7802_fan_is_visible, | |
726 | }; | |
727 | ||
728 | static const struct attribute_group *nct7802_groups[] = { | |
729 | &nct7802_temp_group, | |
730 | &nct7802_in_group, | |
731 | &nct7802_fan_group, | |
732 | NULL | |
733 | }; | |
734 | ||
735 | static int nct7802_detect(struct i2c_client *client, | |
736 | struct i2c_board_info *info) | |
737 | { | |
738 | int reg; | |
739 | ||
740 | /* | |
741 | * Chip identification registers are only available in bank 0, | |
742 | * so only attempt chip detection if bank 0 is selected | |
743 | */ | |
744 | reg = i2c_smbus_read_byte_data(client, REG_BANK); | |
745 | if (reg != 0x00) | |
746 | return -ENODEV; | |
747 | ||
748 | reg = i2c_smbus_read_byte_data(client, REG_VENDOR_ID); | |
749 | if (reg != 0x50) | |
750 | return -ENODEV; | |
751 | ||
752 | reg = i2c_smbus_read_byte_data(client, REG_CHIP_ID); | |
753 | if (reg != 0xc3) | |
754 | return -ENODEV; | |
755 | ||
756 | reg = i2c_smbus_read_byte_data(client, REG_VERSION_ID); | |
757 | if (reg < 0 || (reg & 0xf0) != 0x20) | |
758 | return -ENODEV; | |
759 | ||
760 | /* Also validate lower bits of voltage and temperature registers */ | |
761 | reg = i2c_smbus_read_byte_data(client, REG_TEMP_LSB); | |
762 | if (reg < 0 || (reg & 0x1f)) | |
763 | return -ENODEV; | |
764 | ||
765 | reg = i2c_smbus_read_byte_data(client, REG_TEMP_PECI_LSB); | |
766 | if (reg < 0 || (reg & 0x3f)) | |
767 | return -ENODEV; | |
768 | ||
769 | reg = i2c_smbus_read_byte_data(client, REG_VOLTAGE_LOW); | |
770 | if (reg < 0 || (reg & 0x3f)) | |
771 | return -ENODEV; | |
772 | ||
773 | strlcpy(info->type, "nct7802", I2C_NAME_SIZE); | |
774 | return 0; | |
775 | } | |
776 | ||
777 | static bool nct7802_regmap_is_volatile(struct device *dev, unsigned int reg) | |
778 | { | |
779 | return reg != REG_BANK && reg <= 0x20; | |
780 | } | |
781 | ||
3c535bca | 782 | static const struct regmap_config nct7802_regmap_config = { |
3434f378 GR |
783 | .reg_bits = 8, |
784 | .val_bits = 8, | |
785 | .cache_type = REGCACHE_RBTREE, | |
786 | .volatile_reg = nct7802_regmap_is_volatile, | |
787 | }; | |
788 | ||
789 | static int nct7802_init_chip(struct nct7802_data *data) | |
790 | { | |
791 | int err; | |
792 | ||
793 | /* Enable ADC */ | |
794 | err = regmap_update_bits(data->regmap, REG_START, 0x01, 0x01); | |
795 | if (err) | |
796 | return err; | |
797 | ||
798 | /* Enable local temperature sensor */ | |
799 | err = regmap_update_bits(data->regmap, REG_MODE, 0x40, 0x40); | |
800 | if (err) | |
801 | return err; | |
802 | ||
803 | /* Enable Vcore and VCC voltage monitoring */ | |
804 | return regmap_update_bits(data->regmap, REG_VMON_ENABLE, 0x03, 0x03); | |
805 | } | |
806 | ||
807 | static int nct7802_probe(struct i2c_client *client, | |
808 | const struct i2c_device_id *id) | |
809 | { | |
810 | struct device *dev = &client->dev; | |
811 | struct nct7802_data *data; | |
812 | struct device *hwmon_dev; | |
813 | int ret; | |
814 | ||
815 | data = devm_kzalloc(dev, sizeof(*data), GFP_KERNEL); | |
816 | if (data == NULL) | |
817 | return -ENOMEM; | |
818 | ||
819 | data->regmap = devm_regmap_init_i2c(client, &nct7802_regmap_config); | |
820 | if (IS_ERR(data->regmap)) | |
821 | return PTR_ERR(data->regmap); | |
822 | ||
823 | mutex_init(&data->access_lock); | |
824 | ||
825 | ret = nct7802_init_chip(data); | |
826 | if (ret < 0) | |
827 | return ret; | |
828 | ||
829 | hwmon_dev = devm_hwmon_device_register_with_groups(dev, client->name, | |
830 | data, | |
831 | nct7802_groups); | |
832 | return PTR_ERR_OR_ZERO(hwmon_dev); | |
833 | } | |
834 | ||
835 | static const unsigned short nct7802_address_list[] = { | |
836 | 0x28, 0x29, 0x2a, 0x2b, 0x2c, 0x2d, 0x2e, 0x2f, I2C_CLIENT_END | |
837 | }; | |
838 | ||
839 | static const struct i2c_device_id nct7802_idtable[] = { | |
840 | { "nct7802", 0 }, | |
841 | { } | |
842 | }; | |
843 | MODULE_DEVICE_TABLE(i2c, nct7802_idtable); | |
844 | ||
845 | static struct i2c_driver nct7802_driver = { | |
846 | .class = I2C_CLASS_HWMON, | |
847 | .driver = { | |
848 | .name = DRVNAME, | |
849 | }, | |
850 | .detect = nct7802_detect, | |
851 | .probe = nct7802_probe, | |
852 | .id_table = nct7802_idtable, | |
853 | .address_list = nct7802_address_list, | |
854 | }; | |
855 | ||
856 | module_i2c_driver(nct7802_driver); | |
857 | ||
858 | MODULE_AUTHOR("Guenter Roeck <linux@roeck-us.net>"); | |
859 | MODULE_DESCRIPTION("NCT7802Y Hardware Monitoring Driver"); | |
860 | MODULE_LICENSE("GPL v2"); |