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1 | /* |
2 | * adm9240.c Part of lm_sensors, Linux kernel modules for hardware |
3 | * monitoring |
4 | * |
5 | * Copyright (C) 1999 Frodo Looijaard <frodol@dds.nl> |
6 | * Philip Edelbrock <phil@netroedge.com> |
7 | * Copyright (C) 2003 Michiel Rook <michiel@grendelproject.nl> |
8 | * Copyright (C) 2005 Grant Coady <gcoady.lk@gmail.com> with valuable |
9 | * guidance from Jean Delvare |
10 | * |
11 | * Driver supports Analog Devices ADM9240 |
12 | * Dallas Semiconductor DS1780 |
13 | * National Semiconductor LM81 |
14 | * |
15 | * ADM9240 is the reference, DS1780 and LM81 are register compatibles |
16 | * |
17 | * Voltage Six inputs are scaled by chip, VID also reported |
18 | * Temperature Chip temperature to 0.5'C, maximum and max_hysteris |
19 | * Fans 2 fans, low speed alarm, automatic fan clock divider |
20 | * Alarms 16-bit map of active alarms |
21 | * Analog Out 0..1250 mV output |
22 | * |
23 | * Chassis Intrusion: clear CI latch with 'echo 0 > intrusion0_alarm' |
24 | * |
25 | * Test hardware: Intel SE440BX-2 desktop motherboard --Grant |
26 | * |
27 | * LM81 extended temp reading not implemented |
28 | * |
29 | * This program is free software; you can redistribute it and/or modify |
30 | * it under the terms of the GNU General Public License as published by |
31 | * the Free Software Foundation; either version 2 of the License, or |
32 | * (at your option) any later version. |
33 | * |
34 | * This program is distributed in the hope that it will be useful, |
35 | * but WITHOUT ANY WARRANTY; without even the implied warranty of |
36 | * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the |
37 | * GNU General Public License for more details. |
38 | * |
39 | * You should have received a copy of the GNU General Public License |
40 | * along with this program; if not, write to the Free Software |
41 | * Foundation, Inc., 675 Mass Ave, Cambridge, MA 02139, USA. |
42 | */ |
43 | |
44 | #include <linux/init.h> |
45 | #include <linux/module.h> |
46 | #include <linux/slab.h> |
47 | #include <linux/i2c.h> |
48 | #include <linux/hwmon-sysfs.h> |
49 | #include <linux/hwmon.h> |
50 | #include <linux/hwmon-vid.h> |
51 | #include <linux/err.h> |
52 | #include <linux/mutex.h> |
53 | |
54 | /* Addresses to scan */ |
55 | static const unsigned short normal_i2c[] = { 0x2c, 0x2d, 0x2e, 0x2f, |
56 | I2C_CLIENT_END }; |
57 | |
58 | enum chips { adm9240, ds1780, lm81 }; |
59 | |
60 | /* ADM9240 registers */ |
61 | #define ADM9240_REG_MAN_ID 0x3e |
62 | #define ADM9240_REG_DIE_REV 0x3f |
63 | #define ADM9240_REG_CONFIG 0x40 |
64 | |
65 | #define ADM9240_REG_IN(nr) (0x20 + (nr)) /* 0..5 */ |
66 | #define ADM9240_REG_IN_MAX(nr) (0x2b + (nr) * 2) |
67 | #define ADM9240_REG_IN_MIN(nr) (0x2c + (nr) * 2) |
68 | #define ADM9240_REG_FAN(nr) (0x28 + (nr)) /* 0..1 */ |
69 | #define ADM9240_REG_FAN_MIN(nr) (0x3b + (nr)) |
70 | #define ADM9240_REG_INT(nr) (0x41 + (nr)) |
71 | #define ADM9240_REG_INT_MASK(nr) (0x43 + (nr)) |
72 | #define ADM9240_REG_TEMP 0x27 |
73 | #define ADM9240_REG_TEMP_MAX(nr) (0x39 + (nr)) /* 0, 1 = high, hyst */ |
74 | #define ADM9240_REG_ANALOG_OUT 0x19 |
75 | #define ADM9240_REG_CHASSIS_CLEAR 0x46 |
76 | #define ADM9240_REG_VID_FAN_DIV 0x47 |
77 | #define ADM9240_REG_I2C_ADDR 0x48 |
78 | #define ADM9240_REG_VID4 0x49 |
79 | #define ADM9240_REG_TEMP_CONF 0x4b |
80 | |
81 | /* generalised scaling with integer rounding */ |
82 | static inline int SCALE(long val, int mul, int div) |
83 | { |
84 | if (val < 0) |
85 | return (val * mul - div / 2) / div; |
86 | else |
87 | return (val * mul + div / 2) / div; |
88 | } |
89 | |
90 | /* adm9240 internally scales voltage measurements */ |
91 | static const u16 nom_mv[] = { 2500, 2700, 3300, 5000, 12000, 2700 }; |
92 | |
93 | static inline unsigned int IN_FROM_REG(u8 reg, int n) |
94 | { |
95 | return SCALE(reg, nom_mv[n], 192); |
96 | } |
97 | |
98 | static inline u8 IN_TO_REG(unsigned long val, int n) |
99 | { |
100 | return SENSORS_LIMIT(SCALE(val, 192, nom_mv[n]), 0, 255); |
101 | } |
102 | |
103 | /* temperature range: -40..125, 127 disables temperature alarm */ |
104 | static inline s8 TEMP_TO_REG(long val) |
105 | { |
106 | return SENSORS_LIMIT(SCALE(val, 1, 1000), -40, 127); |
107 | } |
108 | |
109 | /* two fans, each with low fan speed limit */ |
110 | static inline unsigned int FAN_FROM_REG(u8 reg, u8 div) |
111 | { |
112 | if (!reg) /* error */ |
113 | return -1; |
114 | |
115 | if (reg == 255) |
116 | return 0; |
117 | |
118 | return SCALE(1350000, 1, reg * div); |
119 | } |
120 | |
121 | /* analog out 0..1250mV */ |
122 | static inline u8 AOUT_TO_REG(unsigned long val) |
123 | { |
124 | return SENSORS_LIMIT(SCALE(val, 255, 1250), 0, 255); |
125 | } |
126 | |
127 | static inline unsigned int AOUT_FROM_REG(u8 reg) |
128 | { |
129 | return SCALE(reg, 1250, 255); |
130 | } |
131 | |
132 | static int adm9240_probe(struct i2c_client *client, |
133 | const struct i2c_device_id *id); |
134 | static int adm9240_detect(struct i2c_client *client, |
135 | struct i2c_board_info *info); |
136 | static void adm9240_init_client(struct i2c_client *client); |
137 | static int adm9240_remove(struct i2c_client *client); |
138 | static struct adm9240_data *adm9240_update_device(struct device *dev); |
139 | |
140 | /* driver data */ |
141 | static const struct i2c_device_id adm9240_id[] = { |
142 | { "adm9240", adm9240 }, |
143 | { "ds1780", ds1780 }, |
144 | { "lm81", lm81 }, |
145 | { } |
146 | }; |
147 | MODULE_DEVICE_TABLE(i2c, adm9240_id); |
148 | |
149 | static struct i2c_driver adm9240_driver = { |
150 | .class = I2C_CLASS_HWMON, |
151 | .driver = { |
152 | .name = "adm9240", |
153 | }, |
154 | .probe = adm9240_probe, |
155 | .remove = adm9240_remove, |
156 | .id_table = adm9240_id, |
157 | .detect = adm9240_detect, |
158 | .address_list = normal_i2c, |
159 | }; |
160 | |
161 | /* per client data */ |
162 | struct adm9240_data { |
163 | struct device *hwmon_dev; |
164 | struct mutex update_lock; |
165 | char valid; |
166 | unsigned long last_updated_measure; |
167 | unsigned long last_updated_config; |
168 | |
169 | u8 in[6]; /* ro in0_input */ |
170 | u8 in_max[6]; /* rw in0_max */ |
171 | u8 in_min[6]; /* rw in0_min */ |
172 | u8 fan[2]; /* ro fan1_input */ |
173 | u8 fan_min[2]; /* rw fan1_min */ |
174 | u8 fan_div[2]; /* rw fan1_div, read-only accessor */ |
175 | s16 temp; /* ro temp1_input, 9-bit sign-extended */ |
176 | s8 temp_max[2]; /* rw 0 -> temp_max, 1 -> temp_max_hyst */ |
177 | u16 alarms; /* ro alarms */ |
178 | u8 aout; /* rw aout_output */ |
179 | u8 vid; /* ro vid */ |
180 | u8 vrm; /* -- vrm set on startup, no accessor */ |
181 | }; |
182 | |
183 | /*** sysfs accessors ***/ |
184 | |
185 | /* temperature */ |
186 | static ssize_t show_temp(struct device *dev, struct device_attribute *dummy, |
187 | char *buf) |
188 | { |
189 | struct adm9240_data *data = adm9240_update_device(dev); |
190 | return sprintf(buf, "%d\n", data->temp * 500); /* 9-bit value */ |
191 | } |
192 | |
193 | static ssize_t show_max(struct device *dev, struct device_attribute *devattr, |
194 | char *buf) |
195 | { |
196 | struct sensor_device_attribute *attr = to_sensor_dev_attr(devattr); |
197 | struct adm9240_data *data = adm9240_update_device(dev); |
198 | return sprintf(buf, "%d\n", data->temp_max[attr->index] * 1000); |
199 | } |
200 | |
201 | static ssize_t set_max(struct device *dev, struct device_attribute *devattr, |
202 | const char *buf, size_t count) |
203 | { |
204 | struct sensor_device_attribute *attr = to_sensor_dev_attr(devattr); |
205 | struct i2c_client *client = to_i2c_client(dev); |
206 | struct adm9240_data *data = i2c_get_clientdata(client); |
207 | long val; |
208 | int err; |
209 | |
210 | err = kstrtol(buf, 10, &val); |
211 | if (err) |
212 | return err; |
213 | |
214 | mutex_lock(&data->update_lock); |
215 | data->temp_max[attr->index] = TEMP_TO_REG(val); |
216 | i2c_smbus_write_byte_data(client, ADM9240_REG_TEMP_MAX(attr->index), |
217 | data->temp_max[attr->index]); |
218 | mutex_unlock(&data->update_lock); |
219 | return count; |
220 | } |
221 | |
222 | static DEVICE_ATTR(temp1_input, S_IRUGO, show_temp, NULL); |
223 | static SENSOR_DEVICE_ATTR(temp1_max, S_IWUSR | S_IRUGO, |
224 | show_max, set_max, 0); |
225 | static SENSOR_DEVICE_ATTR(temp1_max_hyst, S_IWUSR | S_IRUGO, |
226 | show_max, set_max, 1); |
227 | |
228 | /* voltage */ |
229 | static ssize_t show_in(struct device *dev, struct device_attribute *devattr, |
230 | char *buf) |
231 | { |
232 | struct sensor_device_attribute *attr = to_sensor_dev_attr(devattr); |
233 | struct adm9240_data *data = adm9240_update_device(dev); |
234 | return sprintf(buf, "%d\n", IN_FROM_REG(data->in[attr->index], |
235 | attr->index)); |
236 | } |
237 | |
238 | static ssize_t show_in_min(struct device *dev, |
239 | struct device_attribute *devattr, char *buf) |
240 | { |
241 | struct sensor_device_attribute *attr = to_sensor_dev_attr(devattr); |
242 | struct adm9240_data *data = adm9240_update_device(dev); |
243 | return sprintf(buf, "%d\n", IN_FROM_REG(data->in_min[attr->index], |
244 | attr->index)); |
245 | } |
246 | |
247 | static ssize_t show_in_max(struct device *dev, |
248 | struct device_attribute *devattr, char *buf) |
249 | { |
250 | struct sensor_device_attribute *attr = to_sensor_dev_attr(devattr); |
251 | struct adm9240_data *data = adm9240_update_device(dev); |
252 | return sprintf(buf, "%d\n", IN_FROM_REG(data->in_max[attr->index], |
253 | attr->index)); |
254 | } |
255 | |
256 | static ssize_t set_in_min(struct device *dev, |
257 | struct device_attribute *devattr, |
258 | const char *buf, size_t count) |
259 | { |
260 | struct sensor_device_attribute *attr = to_sensor_dev_attr(devattr); |
261 | struct i2c_client *client = to_i2c_client(dev); |
262 | struct adm9240_data *data = i2c_get_clientdata(client); |
263 | unsigned long val; |
264 | int err; |
265 | |
266 | err = kstrtoul(buf, 10, &val); |
267 | if (err) |
268 | return err; |
269 | |
270 | mutex_lock(&data->update_lock); |
271 | data->in_min[attr->index] = IN_TO_REG(val, attr->index); |
272 | i2c_smbus_write_byte_data(client, ADM9240_REG_IN_MIN(attr->index), |
273 | data->in_min[attr->index]); |
274 | mutex_unlock(&data->update_lock); |
275 | return count; |
276 | } |
277 | |
278 | static ssize_t set_in_max(struct device *dev, |
279 | struct device_attribute *devattr, |
280 | const char *buf, size_t count) |
281 | { |
282 | struct sensor_device_attribute *attr = to_sensor_dev_attr(devattr); |
283 | struct i2c_client *client = to_i2c_client(dev); |
284 | struct adm9240_data *data = i2c_get_clientdata(client); |
285 | unsigned long val; |
286 | int err; |
287 | |
288 | err = kstrtoul(buf, 10, &val); |
289 | if (err) |
290 | return err; |
291 | |
292 | mutex_lock(&data->update_lock); |
293 | data->in_max[attr->index] = IN_TO_REG(val, attr->index); |
294 | i2c_smbus_write_byte_data(client, ADM9240_REG_IN_MAX(attr->index), |
295 | data->in_max[attr->index]); |
296 | mutex_unlock(&data->update_lock); |
297 | return count; |
298 | } |
299 | |
300 | #define vin(nr) \ |
301 | static SENSOR_DEVICE_ATTR(in##nr##_input, S_IRUGO, \ |
302 | show_in, NULL, nr); \ |
303 | static SENSOR_DEVICE_ATTR(in##nr##_min, S_IRUGO | S_IWUSR, \ |
304 | show_in_min, set_in_min, nr); \ |
305 | static SENSOR_DEVICE_ATTR(in##nr##_max, S_IRUGO | S_IWUSR, \ |
306 | show_in_max, set_in_max, nr); |
307 | |
308 | vin(0); |
309 | vin(1); |
310 | vin(2); |
311 | vin(3); |
312 | vin(4); |
313 | vin(5); |
314 | |
315 | /* fans */ |
316 | static ssize_t show_fan(struct device *dev, |
317 | struct device_attribute *devattr, char *buf) |
318 | { |
319 | struct sensor_device_attribute *attr = to_sensor_dev_attr(devattr); |
320 | struct adm9240_data *data = adm9240_update_device(dev); |
321 | return sprintf(buf, "%d\n", FAN_FROM_REG(data->fan[attr->index], |
322 | 1 << data->fan_div[attr->index])); |
323 | } |
324 | |
325 | static ssize_t show_fan_min(struct device *dev, |
326 | struct device_attribute *devattr, char *buf) |
327 | { |
328 | struct sensor_device_attribute *attr = to_sensor_dev_attr(devattr); |
329 | struct adm9240_data *data = adm9240_update_device(dev); |
330 | return sprintf(buf, "%d\n", FAN_FROM_REG(data->fan_min[attr->index], |
331 | 1 << data->fan_div[attr->index])); |
332 | } |
333 | |
334 | static ssize_t show_fan_div(struct device *dev, |
335 | struct device_attribute *devattr, char *buf) |
336 | { |
337 | struct sensor_device_attribute *attr = to_sensor_dev_attr(devattr); |
338 | struct adm9240_data *data = adm9240_update_device(dev); |
339 | return sprintf(buf, "%d\n", 1 << data->fan_div[attr->index]); |
340 | } |
341 | |
342 | /* write new fan div, callers must hold data->update_lock */ |
343 | static void adm9240_write_fan_div(struct i2c_client *client, int nr, |
344 | u8 fan_div) |
345 | { |
346 | u8 reg, old, shift = (nr + 2) * 2; |
347 | |
348 | reg = i2c_smbus_read_byte_data(client, ADM9240_REG_VID_FAN_DIV); |
349 | old = (reg >> shift) & 3; |
350 | reg &= ~(3 << shift); |
351 | reg |= (fan_div << shift); |
352 | i2c_smbus_write_byte_data(client, ADM9240_REG_VID_FAN_DIV, reg); |
353 | dev_dbg(&client->dev, "fan%d clock divider changed from %u " |
354 | "to %u\n", nr + 1, 1 << old, 1 << fan_div); |
355 | } |
356 | |
357 | /* |
358 | * set fan speed low limit: |
359 | * |
360 | * - value is zero: disable fan speed low limit alarm |
361 | * |
362 | * - value is below fan speed measurement range: enable fan speed low |
363 | * limit alarm to be asserted while fan speed too slow to measure |
364 | * |
365 | * - otherwise: select fan clock divider to suit fan speed low limit, |
366 | * measurement code may adjust registers to ensure fan speed reading |
367 | */ |
368 | static ssize_t set_fan_min(struct device *dev, |
369 | struct device_attribute *devattr, |
370 | const char *buf, size_t count) |
371 | { |
372 | struct sensor_device_attribute *attr = to_sensor_dev_attr(devattr); |
373 | struct i2c_client *client = to_i2c_client(dev); |
374 | struct adm9240_data *data = i2c_get_clientdata(client); |
375 | int nr = attr->index; |
376 | u8 new_div; |
377 | unsigned long val; |
378 | int err; |
379 | |
380 | err = kstrtoul(buf, 10, &val); |
381 | if (err) |
382 | return err; |
383 | |
384 | mutex_lock(&data->update_lock); |
385 | |
386 | if (!val) { |
387 | data->fan_min[nr] = 255; |
388 | new_div = data->fan_div[nr]; |
389 | |
390 | dev_dbg(&client->dev, "fan%u low limit set disabled\n", |
391 | nr + 1); |
392 | |
393 | } else if (val < 1350000 / (8 * 254)) { |
394 | new_div = 3; |
395 | data->fan_min[nr] = 254; |
396 | |
397 | dev_dbg(&client->dev, "fan%u low limit set minimum %u\n", |
398 | nr + 1, FAN_FROM_REG(254, 1 << new_div)); |
399 | |
400 | } else { |
401 | unsigned int new_min = 1350000 / val; |
402 | |
403 | new_div = 0; |
404 | while (new_min > 192 && new_div < 3) { |
405 | new_div++; |
406 | new_min /= 2; |
407 | } |
408 | if (!new_min) /* keep > 0 */ |
409 | new_min++; |
410 | |
411 | data->fan_min[nr] = new_min; |
412 | |
413 | dev_dbg(&client->dev, "fan%u low limit set fan speed %u\n", |
414 | nr + 1, FAN_FROM_REG(new_min, 1 << new_div)); |
415 | } |
416 | |
417 | if (new_div != data->fan_div[nr]) { |
418 | data->fan_div[nr] = new_div; |
419 | adm9240_write_fan_div(client, nr, new_div); |
420 | } |
421 | i2c_smbus_write_byte_data(client, ADM9240_REG_FAN_MIN(nr), |
422 | data->fan_min[nr]); |
423 | |
424 | mutex_unlock(&data->update_lock); |
425 | return count; |
426 | } |
427 | |
428 | #define fan(nr) \ |
429 | static SENSOR_DEVICE_ATTR(fan##nr##_input, S_IRUGO, \ |
430 | show_fan, NULL, nr - 1); \ |
431 | static SENSOR_DEVICE_ATTR(fan##nr##_div, S_IRUGO, \ |
432 | show_fan_div, NULL, nr - 1); \ |
433 | static SENSOR_DEVICE_ATTR(fan##nr##_min, S_IRUGO | S_IWUSR, \ |
434 | show_fan_min, set_fan_min, nr - 1); |
435 | |
436 | fan(1); |
437 | fan(2); |
438 | |
439 | /* alarms */ |
440 | static ssize_t show_alarms(struct device *dev, |
441 | struct device_attribute *attr, char *buf) |
442 | { |
443 | struct adm9240_data *data = adm9240_update_device(dev); |
444 | return sprintf(buf, "%u\n", data->alarms); |
445 | } |
446 | static DEVICE_ATTR(alarms, S_IRUGO, show_alarms, NULL); |
447 | |
448 | static ssize_t show_alarm(struct device *dev, |
449 | struct device_attribute *attr, char *buf) |
450 | { |
451 | int bitnr = to_sensor_dev_attr(attr)->index; |
452 | struct adm9240_data *data = adm9240_update_device(dev); |
453 | return sprintf(buf, "%u\n", (data->alarms >> bitnr) & 1); |
454 | } |
455 | static SENSOR_DEVICE_ATTR(in0_alarm, S_IRUGO, show_alarm, NULL, 0); |
456 | static SENSOR_DEVICE_ATTR(in1_alarm, S_IRUGO, show_alarm, NULL, 1); |
457 | static SENSOR_DEVICE_ATTR(in2_alarm, S_IRUGO, show_alarm, NULL, 2); |
458 | static SENSOR_DEVICE_ATTR(in3_alarm, S_IRUGO, show_alarm, NULL, 3); |
459 | static SENSOR_DEVICE_ATTR(in4_alarm, S_IRUGO, show_alarm, NULL, 8); |
460 | static SENSOR_DEVICE_ATTR(in5_alarm, S_IRUGO, show_alarm, NULL, 9); |
461 | static SENSOR_DEVICE_ATTR(temp1_alarm, S_IRUGO, show_alarm, NULL, 4); |
462 | static SENSOR_DEVICE_ATTR(fan1_alarm, S_IRUGO, show_alarm, NULL, 6); |
463 | static SENSOR_DEVICE_ATTR(fan2_alarm, S_IRUGO, show_alarm, NULL, 7); |
464 | |
465 | /* vid */ |
466 | static ssize_t show_vid(struct device *dev, |
467 | struct device_attribute *attr, char *buf) |
468 | { |
469 | struct adm9240_data *data = adm9240_update_device(dev); |
470 | return sprintf(buf, "%d\n", vid_from_reg(data->vid, data->vrm)); |
471 | } |
472 | static DEVICE_ATTR(cpu0_vid, S_IRUGO, show_vid, NULL); |
473 | |
474 | /* analog output */ |
475 | static ssize_t show_aout(struct device *dev, |
476 | struct device_attribute *attr, char *buf) |
477 | { |
478 | struct adm9240_data *data = adm9240_update_device(dev); |
479 | return sprintf(buf, "%d\n", AOUT_FROM_REG(data->aout)); |
480 | } |
481 | |
482 | static ssize_t set_aout(struct device *dev, |
483 | struct device_attribute *attr, |
484 | const char *buf, size_t count) |
485 | { |
486 | struct i2c_client *client = to_i2c_client(dev); |
487 | struct adm9240_data *data = i2c_get_clientdata(client); |
488 | long val; |
489 | int err; |
490 | |
491 | err = kstrtol(buf, 10, &val); |
492 | if (err) |
493 | return err; |
494 | |
495 | mutex_lock(&data->update_lock); |
496 | data->aout = AOUT_TO_REG(val); |
497 | i2c_smbus_write_byte_data(client, ADM9240_REG_ANALOG_OUT, data->aout); |
498 | mutex_unlock(&data->update_lock); |
499 | return count; |
500 | } |
501 | static DEVICE_ATTR(aout_output, S_IRUGO | S_IWUSR, show_aout, set_aout); |
502 | |
503 | /* chassis_clear */ |
504 | static ssize_t chassis_clear_legacy(struct device *dev, |
505 | struct device_attribute *attr, |
506 | const char *buf, size_t count) |
507 | { |
508 | struct i2c_client *client = to_i2c_client(dev); |
509 | long val; |
510 | int err; |
511 | |
512 | err = kstrtol(buf, 10, &val); |
513 | if (err) |
514 | return err; |
515 | |
516 | dev_warn(dev, "Attribute chassis_clear is deprecated, " |
517 | "use intrusion0_alarm instead\n"); |
518 | |
519 | if (val == 1) { |
520 | i2c_smbus_write_byte_data(client, |
521 | ADM9240_REG_CHASSIS_CLEAR, 0x80); |
522 | dev_dbg(&client->dev, "chassis intrusion latch cleared\n"); |
523 | } |
524 | return count; |
525 | } |
526 | static DEVICE_ATTR(chassis_clear, S_IWUSR, NULL, chassis_clear_legacy); |
527 | |
528 | static ssize_t chassis_clear(struct device *dev, |
529 | struct device_attribute *attr, |
530 | const char *buf, size_t count) |
531 | { |
532 | struct i2c_client *client = to_i2c_client(dev); |
533 | struct adm9240_data *data = i2c_get_clientdata(client); |
534 | unsigned long val; |
535 | |
536 | if (kstrtoul(buf, 10, &val) || val != 0) |
537 | return -EINVAL; |
538 | |
539 | mutex_lock(&data->update_lock); |
540 | i2c_smbus_write_byte_data(client, ADM9240_REG_CHASSIS_CLEAR, 0x80); |
541 | data->valid = 0; /* Force cache refresh */ |
542 | mutex_unlock(&data->update_lock); |
543 | dev_dbg(&client->dev, "chassis intrusion latch cleared\n"); |
544 | |
545 | return count; |
546 | } |
547 | static SENSOR_DEVICE_ATTR(intrusion0_alarm, S_IRUGO | S_IWUSR, show_alarm, |
548 | chassis_clear, 12); |
549 | |
550 | static struct attribute *adm9240_attributes[] = { |
551 | &sensor_dev_attr_in0_input.dev_attr.attr, |
552 | &sensor_dev_attr_in0_min.dev_attr.attr, |
553 | &sensor_dev_attr_in0_max.dev_attr.attr, |
554 | &sensor_dev_attr_in0_alarm.dev_attr.attr, |
555 | &sensor_dev_attr_in1_input.dev_attr.attr, |
556 | &sensor_dev_attr_in1_min.dev_attr.attr, |
557 | &sensor_dev_attr_in1_max.dev_attr.attr, |
558 | &sensor_dev_attr_in1_alarm.dev_attr.attr, |
559 | &sensor_dev_attr_in2_input.dev_attr.attr, |
560 | &sensor_dev_attr_in2_min.dev_attr.attr, |
561 | &sensor_dev_attr_in2_max.dev_attr.attr, |
562 | &sensor_dev_attr_in2_alarm.dev_attr.attr, |
563 | &sensor_dev_attr_in3_input.dev_attr.attr, |
564 | &sensor_dev_attr_in3_min.dev_attr.attr, |
565 | &sensor_dev_attr_in3_max.dev_attr.attr, |
566 | &sensor_dev_attr_in3_alarm.dev_attr.attr, |
567 | &sensor_dev_attr_in4_input.dev_attr.attr, |
568 | &sensor_dev_attr_in4_min.dev_attr.attr, |
569 | &sensor_dev_attr_in4_max.dev_attr.attr, |
570 | &sensor_dev_attr_in4_alarm.dev_attr.attr, |
571 | &sensor_dev_attr_in5_input.dev_attr.attr, |
572 | &sensor_dev_attr_in5_min.dev_attr.attr, |
573 | &sensor_dev_attr_in5_max.dev_attr.attr, |
574 | &sensor_dev_attr_in5_alarm.dev_attr.attr, |
575 | &dev_attr_temp1_input.attr, |
576 | &sensor_dev_attr_temp1_max.dev_attr.attr, |
577 | &sensor_dev_attr_temp1_max_hyst.dev_attr.attr, |
578 | &sensor_dev_attr_temp1_alarm.dev_attr.attr, |
579 | &sensor_dev_attr_fan1_input.dev_attr.attr, |
580 | &sensor_dev_attr_fan1_div.dev_attr.attr, |
581 | &sensor_dev_attr_fan1_min.dev_attr.attr, |
582 | &sensor_dev_attr_fan1_alarm.dev_attr.attr, |
583 | &sensor_dev_attr_fan2_input.dev_attr.attr, |
584 | &sensor_dev_attr_fan2_div.dev_attr.attr, |
585 | &sensor_dev_attr_fan2_min.dev_attr.attr, |
586 | &sensor_dev_attr_fan2_alarm.dev_attr.attr, |
587 | &dev_attr_alarms.attr, |
588 | &dev_attr_aout_output.attr, |
589 | &dev_attr_chassis_clear.attr, |
590 | &sensor_dev_attr_intrusion0_alarm.dev_attr.attr, |
591 | &dev_attr_cpu0_vid.attr, |
592 | NULL |
593 | }; |
594 | |
595 | static const struct attribute_group adm9240_group = { |
596 | .attrs = adm9240_attributes, |
597 | }; |
598 | |
599 | |
600 | /*** sensor chip detect and driver install ***/ |
601 | |
602 | /* Return 0 if detection is successful, -ENODEV otherwise */ |
603 | static int adm9240_detect(struct i2c_client *new_client, |
604 | struct i2c_board_info *info) |
605 | { |
606 | struct i2c_adapter *adapter = new_client->adapter; |
607 | const char *name = ""; |
608 | int address = new_client->addr; |
609 | u8 man_id, die_rev; |
610 | |
611 | if (!i2c_check_functionality(adapter, I2C_FUNC_SMBUS_BYTE_DATA)) |
612 | return -ENODEV; |
613 | |
614 | /* verify chip: reg address should match i2c address */ |
615 | if (i2c_smbus_read_byte_data(new_client, ADM9240_REG_I2C_ADDR) |
616 | != address) { |
617 | dev_err(&adapter->dev, "detect fail: address match, 0x%02x\n", |
618 | address); |
619 | return -ENODEV; |
620 | } |
621 | |
622 | /* check known chip manufacturer */ |
623 | man_id = i2c_smbus_read_byte_data(new_client, ADM9240_REG_MAN_ID); |
624 | if (man_id == 0x23) { |
625 | name = "adm9240"; |
626 | } else if (man_id == 0xda) { |
627 | name = "ds1780"; |
628 | } else if (man_id == 0x01) { |
629 | name = "lm81"; |
630 | } else { |
631 | dev_err(&adapter->dev, "detect fail: unknown manuf, 0x%02x\n", |
632 | man_id); |
633 | return -ENODEV; |
634 | } |
635 | |
636 | /* successful detect, print chip info */ |
637 | die_rev = i2c_smbus_read_byte_data(new_client, ADM9240_REG_DIE_REV); |
638 | dev_info(&adapter->dev, "found %s revision %u\n", |
639 | man_id == 0x23 ? "ADM9240" : |
640 | man_id == 0xda ? "DS1780" : "LM81", die_rev); |
641 | |
642 | strlcpy(info->type, name, I2C_NAME_SIZE); |
643 | |
644 | return 0; |
645 | } |
646 | |
647 | static int adm9240_probe(struct i2c_client *new_client, |
648 | const struct i2c_device_id *id) |
649 | { |
650 | struct adm9240_data *data; |
651 | int err; |
652 | |
653 | data = devm_kzalloc(&new_client->dev, sizeof(*data), GFP_KERNEL); |
654 | if (!data) |
655 | return -ENOMEM; |
656 | |
657 | i2c_set_clientdata(new_client, data); |
658 | mutex_init(&data->update_lock); |
659 | |
660 | adm9240_init_client(new_client); |
661 | |
662 | /* populate sysfs filesystem */ |
663 | err = sysfs_create_group(&new_client->dev.kobj, &adm9240_group); |
664 | if (err) |
665 | return err; |
666 | |
667 | data->hwmon_dev = hwmon_device_register(&new_client->dev); |
668 | if (IS_ERR(data->hwmon_dev)) { |
669 | err = PTR_ERR(data->hwmon_dev); |
670 | goto exit_remove; |
671 | } |
672 | |
673 | return 0; |
674 | |
675 | exit_remove: |
676 | sysfs_remove_group(&new_client->dev.kobj, &adm9240_group); |
677 | return err; |
678 | } |
679 | |
680 | static int adm9240_remove(struct i2c_client *client) |
681 | { |
682 | struct adm9240_data *data = i2c_get_clientdata(client); |
683 | |
684 | hwmon_device_unregister(data->hwmon_dev); |
685 | sysfs_remove_group(&client->dev.kobj, &adm9240_group); |
686 | |
687 | return 0; |
688 | } |
689 | |
690 | static void adm9240_init_client(struct i2c_client *client) |
691 | { |
692 | struct adm9240_data *data = i2c_get_clientdata(client); |
693 | u8 conf = i2c_smbus_read_byte_data(client, ADM9240_REG_CONFIG); |
694 | u8 mode = i2c_smbus_read_byte_data(client, ADM9240_REG_TEMP_CONF) & 3; |
695 | |
696 | data->vrm = vid_which_vrm(); /* need this to report vid as mV */ |
697 | |
698 | dev_info(&client->dev, "Using VRM: %d.%d\n", data->vrm / 10, |
699 | data->vrm % 10); |
700 | |
701 | if (conf & 1) { /* measurement cycle running: report state */ |
702 | |
703 | dev_info(&client->dev, "status: config 0x%02x mode %u\n", |
704 | conf, mode); |
705 | |
706 | } else { /* cold start: open limits before starting chip */ |
707 | int i; |
708 | |
709 | for (i = 0; i < 6; i++) { |
710 | i2c_smbus_write_byte_data(client, |
711 | ADM9240_REG_IN_MIN(i), 0); |
712 | i2c_smbus_write_byte_data(client, |
713 | ADM9240_REG_IN_MAX(i), 255); |
714 | } |
715 | i2c_smbus_write_byte_data(client, |
716 | ADM9240_REG_FAN_MIN(0), 255); |
717 | i2c_smbus_write_byte_data(client, |
718 | ADM9240_REG_FAN_MIN(1), 255); |
719 | i2c_smbus_write_byte_data(client, |
720 | ADM9240_REG_TEMP_MAX(0), 127); |
721 | i2c_smbus_write_byte_data(client, |
722 | ADM9240_REG_TEMP_MAX(1), 127); |
723 | |
724 | /* start measurement cycle */ |
725 | i2c_smbus_write_byte_data(client, ADM9240_REG_CONFIG, 1); |
726 | |
727 | dev_info(&client->dev, "cold start: config was 0x%02x " |
728 | "mode %u\n", conf, mode); |
729 | } |
730 | } |
731 | |
732 | static struct adm9240_data *adm9240_update_device(struct device *dev) |
733 | { |
734 | struct i2c_client *client = to_i2c_client(dev); |
735 | struct adm9240_data *data = i2c_get_clientdata(client); |
736 | int i; |
737 | |
738 | mutex_lock(&data->update_lock); |
739 | |
740 | /* minimum measurement cycle: 1.75 seconds */ |
741 | if (time_after(jiffies, data->last_updated_measure + (HZ * 7 / 4)) |
742 | || !data->valid) { |
743 | |
744 | for (i = 0; i < 6; i++) { /* read voltages */ |
745 | data->in[i] = i2c_smbus_read_byte_data(client, |
746 | ADM9240_REG_IN(i)); |
747 | } |
748 | data->alarms = i2c_smbus_read_byte_data(client, |
749 | ADM9240_REG_INT(0)) | |
750 | i2c_smbus_read_byte_data(client, |
751 | ADM9240_REG_INT(1)) << 8; |
752 | |
753 | /* |
754 | * read temperature: assume temperature changes less than |
755 | * 0.5'C per two measurement cycles thus ignore possible |
756 | * but unlikely aliasing error on lsb reading. --Grant |
757 | */ |
758 | data->temp = ((i2c_smbus_read_byte_data(client, |
759 | ADM9240_REG_TEMP) << 8) | |
760 | i2c_smbus_read_byte_data(client, |
761 | ADM9240_REG_TEMP_CONF)) / 128; |
762 | |
763 | for (i = 0; i < 2; i++) { /* read fans */ |
764 | data->fan[i] = i2c_smbus_read_byte_data(client, |
765 | ADM9240_REG_FAN(i)); |
766 | |
767 | /* adjust fan clock divider on overflow */ |
768 | if (data->valid && data->fan[i] == 255 && |
769 | data->fan_div[i] < 3) { |
770 | |
771 | adm9240_write_fan_div(client, i, |
772 | ++data->fan_div[i]); |
773 | |
774 | /* adjust fan_min if active, but not to 0 */ |
775 | if (data->fan_min[i] < 255 && |
776 | data->fan_min[i] >= 2) |
777 | data->fan_min[i] /= 2; |
778 | } |
779 | } |
780 | data->last_updated_measure = jiffies; |
781 | } |
782 | |
783 | /* minimum config reading cycle: 300 seconds */ |
784 | if (time_after(jiffies, data->last_updated_config + (HZ * 300)) |
785 | || !data->valid) { |
786 | |
787 | for (i = 0; i < 6; i++) { |
788 | data->in_min[i] = i2c_smbus_read_byte_data(client, |
789 | ADM9240_REG_IN_MIN(i)); |
790 | data->in_max[i] = i2c_smbus_read_byte_data(client, |
791 | ADM9240_REG_IN_MAX(i)); |
792 | } |
793 | for (i = 0; i < 2; i++) { |
794 | data->fan_min[i] = i2c_smbus_read_byte_data(client, |
795 | ADM9240_REG_FAN_MIN(i)); |
796 | } |
797 | data->temp_max[0] = i2c_smbus_read_byte_data(client, |
798 | ADM9240_REG_TEMP_MAX(0)); |
799 | data->temp_max[1] = i2c_smbus_read_byte_data(client, |
800 | ADM9240_REG_TEMP_MAX(1)); |
801 | |
802 | /* read fan divs and 5-bit VID */ |
803 | i = i2c_smbus_read_byte_data(client, ADM9240_REG_VID_FAN_DIV); |
804 | data->fan_div[0] = (i >> 4) & 3; |
805 | data->fan_div[1] = (i >> 6) & 3; |
806 | data->vid = i & 0x0f; |
807 | data->vid |= (i2c_smbus_read_byte_data(client, |
808 | ADM9240_REG_VID4) & 1) << 4; |
809 | /* read analog out */ |
810 | data->aout = i2c_smbus_read_byte_data(client, |
811 | ADM9240_REG_ANALOG_OUT); |
812 | |
813 | data->last_updated_config = jiffies; |
814 | data->valid = 1; |
815 | } |
816 | mutex_unlock(&data->update_lock); |
817 | return data; |
818 | } |
819 | |
820 | module_i2c_driver(adm9240_driver); |
821 | |
822 | MODULE_AUTHOR("Michiel Rook <michiel@grendelproject.nl>, " |
823 | "Grant Coady <gcoady.lk@gmail.com> and others"); |
824 | MODULE_DESCRIPTION("ADM9240/DS1780/LM81 driver"); |
825 | MODULE_LICENSE("GPL"); |
826 |
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