projects / linux-2.6-block.git / blame
? search:
summary | shortlog | log | commit | commitdiff | tree
blob | blame (incremental) | history | HEAD
Merge tag 'dlm-3.6' of git://git.kernel.org/pub/scm/linux/kernel/git/teigland/linux-dlm
[linux-2.6-block.git] / drivers / hwmon / adm9240.c
CommitLineData
40b5cda2
GC		 1/*
2 * adm9240.c Part of lm_sensors, Linux kernel modules for hardware
c387e4eb 3 * monitoring
40b5cda2
GC		 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>
2ca7b961 8 * Copyright (C) 2005 Grant Coady <gcoady.lk@gmail.com> with valuable
c387e4eb 9 * guidance from Jean Delvare
40b5cda2
GC		 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 *
0de2b244 23 * Chassis Intrusion: clear CI latch with 'echo 0 > intrusion0_alarm'
40b5cda2
GC		 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>
c7461a66 48#include <linux/hwmon-sysfs.h>
943b0830 49#include <linux/hwmon.h>
303760b4 50#include <linux/hwmon-vid.h>
943b0830 51#include <linux/err.h>
9a61bf63 52#include <linux/mutex.h>
40b5cda2
GC		 53
54/* Addresses to scan */
25e9c86d 55static const unsigned short normal_i2c[] = { 0x2c, 0x2d, 0x2e, 0x2f,
40b5cda2
GC		 56 I2C_CLIENT_END };
57
e5e9f44c 58enum chips { adm9240, ds1780, lm81 };
40b5cda2
GC		 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
c7461a66 73#define ADM9240_REG_TEMP_MAX(nr) (0x39 + (nr)) /* 0, 1 = high, hyst */
40b5cda2
GC		 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 */
82static 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 */
91static const u16 nom_mv[] = { 2500, 2700, 3300, 5000, 12000, 2700 };
92
93static inline unsigned int IN_FROM_REG(u8 reg, int n)
94{
95 return SCALE(reg, nom_mv[n], 192);
96}
97
98static 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 */
104static 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 */
110static 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 */
122static inline u8 AOUT_TO_REG(unsigned long val)
123{
124 return SENSORS_LIMIT(SCALE(val, 255, 1250), 0, 255);
125}
126
127static inline unsigned int AOUT_FROM_REG(u8 reg)
128{
129 return SCALE(reg, 1250, 255);
130}
131
7fae8283
JD		 132static int adm9240_probe(struct i2c_client *client,
133 const struct i2c_device_id *id);
310ec792 134static int adm9240_detect(struct i2c_client *client,
7fae8283 135 struct i2c_board_info *info);
40b5cda2 136static void adm9240_init_client(struct i2c_client *client);
7fae8283 137static int adm9240_remove(struct i2c_client *client);
40b5cda2
GC		 138static struct adm9240_data *adm9240_update_device(struct device *dev);
139
140/* driver data */
7fae8283
JD		 141static const struct i2c_device_id adm9240_id[] = {
142 { "adm9240", adm9240 },
143 { "ds1780", ds1780 },
144 { "lm81", lm81 },
145 { }
146};
147MODULE_DEVICE_TABLE(i2c, adm9240_id);
148
40b5cda2 149static struct i2c_driver adm9240_driver = {
7fae8283 150 .class = I2C_CLASS_HWMON,
cdaf7934 151 .driver = {
cdaf7934
LR		 152 .name = "adm9240",
153 },
7fae8283
JD		 154 .probe = adm9240_probe,
155 .remove = adm9240_remove,
156 .id_table = adm9240_id,
157 .detect = adm9240_detect,
c3813d6a 158 .address_list = normal_i2c,
40b5cda2
GC		 159};
160
161/* per client data */
162struct adm9240_data {
1beeffe4 163 struct device *hwmon_dev;
9a61bf63 164 struct mutex update_lock;
40b5cda2
GC		 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 */
c7461a66 176 s8 temp_max[2]; /* rw 0 -> temp_max, 1 -> temp_max_hyst */
40b5cda2 177 u16 alarms; /* ro alarms */
8e8f9289 178 u8 aout; /* rw aout_output */
40b5cda2
GC		 179 u8 vid; /* ro vid */
180 u8 vrm; /* -- vrm set on startup, no accessor */
181};
182
40b5cda2
GC		 183/*** sysfs accessors ***/
184
185/* temperature */
c7461a66
GC		 186static 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
193static 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
201static 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);
c387e4eb
GR		 207 long val;
208 int err;
209
210 err = kstrtol(buf, 10, &val);
211 if (err)
212 return err;
c7461a66 213
9a61bf63 214 mutex_lock(&data->update_lock);
c7461a66
GC		 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]);
9a61bf63 218 mutex_unlock(&data->update_lock);
c7461a66
GC		 219 return count;
220}
221
40b5cda2 222static DEVICE_ATTR(temp1_input, S_IRUGO, show_temp, NULL);
c7461a66
GC		 223static SENSOR_DEVICE_ATTR(temp1_max, S_IWUSR | S_IRUGO,
224 show_max, set_max, 0);
225static SENSOR_DEVICE_ATTR(temp1_max_hyst, S_IWUSR | S_IRUGO,
226 show_max, set_max, 1);
40b5cda2
GC		 227
228/* voltage */
c7461a66
GC		 229static ssize_t show_in(struct device *dev, struct device_attribute *devattr,
230 char *buf)
40b5cda2 231{
c7461a66 232 struct sensor_device_attribute *attr = to_sensor_dev_attr(devattr);
40b5cda2 233 struct adm9240_data *data = adm9240_update_device(dev);
c7461a66
GC		 234 return sprintf(buf, "%d\n", IN_FROM_REG(data->in[attr->index],
235 attr->index));
40b5cda2
GC		 236}
237
e415e48b
JD		 238static ssize_t show_in_min(struct device *dev,
239 struct device_attribute *devattr, char *buf)
40b5cda2 240{
c7461a66 241 struct sensor_device_attribute *attr = to_sensor_dev_attr(devattr);
40b5cda2 242 struct adm9240_data *data = adm9240_update_device(dev);
c7461a66
GC		 243 return sprintf(buf, "%d\n", IN_FROM_REG(data->in_min[attr->index],
244 attr->index));
40b5cda2
GC		 245}
246
e415e48b
JD		 247static ssize_t show_in_max(struct device *dev,
248 struct device_attribute *devattr, char *buf)
40b5cda2 249{
c7461a66 250 struct sensor_device_attribute *attr = to_sensor_dev_attr(devattr);
40b5cda2 251 struct adm9240_data *data = adm9240_update_device(dev);
c7461a66
GC		 252 return sprintf(buf, "%d\n", IN_FROM_REG(data->in_max[attr->index],
253 attr->index));
40b5cda2
GC		 254}
255
e415e48b
JD		 256static ssize_t set_in_min(struct device *dev,
257 struct device_attribute *devattr,
c7461a66 258 const char *buf, size_t count)
40b5cda2 259{
c7461a66 260 struct sensor_device_attribute *attr = to_sensor_dev_attr(devattr);
40b5cda2
GC		 261 struct i2c_client *client = to_i2c_client(dev);
262 struct adm9240_data *data = i2c_get_clientdata(client);
c387e4eb
GR		 263 unsigned long val;
264 int err;
265
266 err = kstrtoul(buf, 10, &val);
267 if (err)
268 return err;
40b5cda2 269
9a61bf63 270 mutex_lock(&data->update_lock);
c7461a66
GC		 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]);
9a61bf63 274 mutex_unlock(&data->update_lock);
40b5cda2
GC		 275 return count;
276}
277
e415e48b
JD		 278static ssize_t set_in_max(struct device *dev,
279 struct device_attribute *devattr,
c7461a66 280 const char *buf, size_t count)
40b5cda2 281{
c7461a66 282 struct sensor_device_attribute *attr = to_sensor_dev_attr(devattr);
40b5cda2
GC		 283 struct i2c_client *client = to_i2c_client(dev);
284 struct adm9240_data *data = i2c_get_clientdata(client);
c387e4eb
GR		 285 unsigned long val;
286 int err;
287
288 err = kstrtoul(buf, 10, &val);
289 if (err)
290 return err;
40b5cda2 291
9a61bf63 292 mutex_lock(&data->update_lock);
c7461a66
GC		 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]);
9a61bf63 296 mutex_unlock(&data->update_lock);
40b5cda2
GC		 297 return count;
298}
299
c7461a66 300#define vin(nr) \
c387e4eb 301static SENSOR_DEVICE_ATTR(in##nr##_input, S_IRUGO, \
c7461a66
GC		 302 show_in, NULL, nr); \
303static SENSOR_DEVICE_ATTR(in##nr##_min, S_IRUGO | S_IWUSR, \
304 show_in_min, set_in_min, nr); \
305static SENSOR_DEVICE_ATTR(in##nr##_max, S_IRUGO | S_IWUSR, \
306 show_in_max, set_in_max, nr);
307
308vin(0);
309vin(1);
310vin(2);
311vin(3);
312vin(4);
313vin(5);
40b5cda2
GC		 314
315/* fans */
c7461a66
GC		 316static ssize_t show_fan(struct device *dev,
317 struct device_attribute *devattr, char *buf)
40b5cda2 318{
c7461a66 319 struct sensor_device_attribute *attr = to_sensor_dev_attr(devattr);
40b5cda2 320 struct adm9240_data *data = adm9240_update_device(dev);
c7461a66
GC		 321 return sprintf(buf, "%d\n", FAN_FROM_REG(data->fan[attr->index],
322 1 << data->fan_div[attr->index]));
40b5cda2
GC		 323}
324
c7461a66
GC		 325static ssize_t show_fan_min(struct device *dev,
326 struct device_attribute *devattr, char *buf)
40b5cda2 327{
c7461a66 328 struct sensor_device_attribute *attr = to_sensor_dev_attr(devattr);
40b5cda2 329 struct adm9240_data *data = adm9240_update_device(dev);
c7461a66
GC		 330 return sprintf(buf, "%d\n", FAN_FROM_REG(data->fan_min[attr->index],
331 1 << data->fan_div[attr->index]));
40b5cda2
GC		 332}
333
c7461a66
GC		 334static ssize_t show_fan_div(struct device *dev,
335 struct device_attribute *devattr, char *buf)
40b5cda2 336{
c7461a66 337 struct sensor_device_attribute *attr = to_sensor_dev_attr(devattr);
40b5cda2 338 struct adm9240_data *data = adm9240_update_device(dev);
c7461a66 339 return sprintf(buf, "%d\n", 1 << data->fan_div[attr->index]);
40b5cda2
GC		 340}
341
342/* write new fan div, callers must hold data->update_lock */
343static 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
205cf13e 348 reg = i2c_smbus_read_byte_data(client, ADM9240_REG_VID_FAN_DIV);
40b5cda2
GC		 349 old = (reg >> shift) & 3;
350 reg &= ~(3 << shift);
351 reg |= (fan_div << shift);
205cf13e 352 i2c_smbus_write_byte_data(client, ADM9240_REG_VID_FAN_DIV, reg);
40b5cda2
GC		 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
e415e48b 357/*
40b5cda2
GC		 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 */
c7461a66
GC		 368static ssize_t set_fan_min(struct device *dev,
369 struct device_attribute *devattr,
370 const char *buf, size_t count)
40b5cda2 371{
c7461a66 372 struct sensor_device_attribute *attr = to_sensor_dev_attr(devattr);
40b5cda2
GC		 373 struct i2c_client *client = to_i2c_client(dev);
374 struct adm9240_data *data = i2c_get_clientdata(client);
c7461a66 375 int nr = attr->index;
40b5cda2 376 u8 new_div;
c387e4eb
GR		 377 unsigned long val;
378 int err;
379
380 err = kstrtoul(buf, 10, &val);
381 if (err)
382 return err;
40b5cda2 383
9a61bf63 384 mutex_lock(&data->update_lock);
40b5cda2
GC		 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 }
205cf13e 421 i2c_smbus_write_byte_data(client, ADM9240_REG_FAN_MIN(nr),
40b5cda2
GC		 422 data->fan_min[nr]);
423
9a61bf63 424 mutex_unlock(&data->update_lock);
40b5cda2
GC		 425 return count;
426}
427
c7461a66
GC		 428#define fan(nr) \
429static SENSOR_DEVICE_ATTR(fan##nr##_input, S_IRUGO, \
430 show_fan, NULL, nr - 1); \
431static SENSOR_DEVICE_ATTR(fan##nr##_div, S_IRUGO, \
432 show_fan_div, NULL, nr - 1); \
433static SENSOR_DEVICE_ATTR(fan##nr##_min, S_IRUGO | S_IWUSR, \
434 show_fan_min, set_fan_min, nr - 1);
435
436fan(1);
437fan(2);
40b5cda2
GC		 438
439/* alarms */
e415e48b
JD		 440static ssize_t show_alarms(struct device *dev,
441 struct device_attribute *attr, char *buf)
40b5cda2
GC		 442{
443 struct adm9240_data *data = adm9240_update_device(dev);
444 return sprintf(buf, "%u\n", data->alarms);
445}
446static DEVICE_ATTR(alarms, S_IRUGO, show_alarms, NULL);
447
360f9452
JD		 448static 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}
455static SENSOR_DEVICE_ATTR(in0_alarm, S_IRUGO, show_alarm, NULL, 0);
456static SENSOR_DEVICE_ATTR(in1_alarm, S_IRUGO, show_alarm, NULL, 1);
457static SENSOR_DEVICE_ATTR(in2_alarm, S_IRUGO, show_alarm, NULL, 2);
458static SENSOR_DEVICE_ATTR(in3_alarm, S_IRUGO, show_alarm, NULL, 3);
459static SENSOR_DEVICE_ATTR(in4_alarm, S_IRUGO, show_alarm, NULL, 8);
460static SENSOR_DEVICE_ATTR(in5_alarm, S_IRUGO, show_alarm, NULL, 9);
461static SENSOR_DEVICE_ATTR(temp1_alarm, S_IRUGO, show_alarm, NULL, 4);
462static SENSOR_DEVICE_ATTR(fan1_alarm, S_IRUGO, show_alarm, NULL, 6);
463static SENSOR_DEVICE_ATTR(fan2_alarm, S_IRUGO, show_alarm, NULL, 7);
464
40b5cda2 465/* vid */
e415e48b
JD		 466static ssize_t show_vid(struct device *dev,
467 struct device_attribute *attr, char *buf)
40b5cda2
GC		 468{
469 struct adm9240_data *data = adm9240_update_device(dev);
470 return sprintf(buf, "%d\n", vid_from_reg(data->vid, data->vrm));
471}
472static DEVICE_ATTR(cpu0_vid, S_IRUGO, show_vid, NULL);
473
474/* analog output */
e415e48b
JD		 475static ssize_t show_aout(struct device *dev,
476 struct device_attribute *attr, char *buf)
40b5cda2
GC		 477{
478 struct adm9240_data *data = adm9240_update_device(dev);
479 return sprintf(buf, "%d\n", AOUT_FROM_REG(data->aout));
480}
481
e415e48b
JD		 482static ssize_t set_aout(struct device *dev,
483 struct device_attribute *attr,
484 const char *buf, size_t count)
40b5cda2
GC		 485{
486 struct i2c_client *client = to_i2c_client(dev);
487 struct adm9240_data *data = i2c_get_clientdata(client);
c387e4eb
GR		 488 long val;
489 int err;
490
491 err = kstrtol(buf, 10, &val);
492 if (err)
493 return err;
40b5cda2 494
9a61bf63 495 mutex_lock(&data->update_lock);
40b5cda2 496 data->aout = AOUT_TO_REG(val);
205cf13e 497 i2c_smbus_write_byte_data(client, ADM9240_REG_ANALOG_OUT, data->aout);
9a61bf63 498 mutex_unlock(&data->update_lock);
40b5cda2
GC		 499 return count;
500}
501static DEVICE_ATTR(aout_output, S_IRUGO | S_IWUSR, show_aout, set_aout);
502
503/* chassis_clear */
0de2b244 504static ssize_t chassis_clear_legacy(struct device *dev,
e415e48b
JD		 505 struct device_attribute *attr,
506 const char *buf, size_t count)
40b5cda2
GC		 507{
508 struct i2c_client *client = to_i2c_client(dev);
c387e4eb
GR		 509 long val;
510 int err;
511
512 err = kstrtol(buf, 10, &val);
513 if (err)
514 return err;
40b5cda2 515
0de2b244
JD		 516 dev_warn(dev, "Attribute chassis_clear is deprecated, "
517 "use intrusion0_alarm instead\n");
518
40b5cda2 519 if (val == 1) {
205cf13e
GC		 520 i2c_smbus_write_byte_data(client,
521 ADM9240_REG_CHASSIS_CLEAR, 0x80);
40b5cda2
GC		 522 dev_dbg(&client->dev, "chassis intrusion latch cleared\n");
523 }
524 return count;
525}
0de2b244
JD		 526static DEVICE_ATTR(chassis_clear, S_IWUSR, NULL, chassis_clear_legacy);
527
528static 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
179c4fdb 536 if (kstrtoul(buf, 10, &val) || val != 0)
0de2b244
JD		 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}
547static SENSOR_DEVICE_ATTR(intrusion0_alarm, S_IRUGO | S_IWUSR, show_alarm,
548 chassis_clear, 12);
40b5cda2 549
681c6f7a
MH		 550static 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,
360f9452 554 &sensor_dev_attr_in0_alarm.dev_attr.attr,
681c6f7a
MH		 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,
360f9452 558 &sensor_dev_attr_in1_alarm.dev_attr.attr,
681c6f7a
MH		 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,
360f9452 562 &sensor_dev_attr_in2_alarm.dev_attr.attr,
681c6f7a
MH		 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,
360f9452 566 &sensor_dev_attr_in3_alarm.dev_attr.attr,
681c6f7a
MH		 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,
360f9452 570 &sensor_dev_attr_in4_alarm.dev_attr.attr,
681c6f7a
MH		 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,
360f9452 574 &sensor_dev_attr_in5_alarm.dev_attr.attr,
681c6f7a
MH		 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,
360f9452 578 &sensor_dev_attr_temp1_alarm.dev_attr.attr,
681c6f7a
MH		 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,
360f9452 582 &sensor_dev_attr_fan1_alarm.dev_attr.attr,
681c6f7a
MH		 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,
360f9452 586 &sensor_dev_attr_fan2_alarm.dev_attr.attr,
681c6f7a
MH		 587 &dev_attr_alarms.attr,
588 &dev_attr_aout_output.attr,
589 &dev_attr_chassis_clear.attr,
0de2b244 590 &sensor_dev_attr_intrusion0_alarm.dev_attr.attr,
681c6f7a
MH		 591 &dev_attr_cpu0_vid.attr,
592 NULL
593};
594
595static const struct attribute_group adm9240_group = {
596 .attrs = adm9240_attributes,
597};
598
40b5cda2
GC		 599
600/*** sensor chip detect and driver install ***/
601
7fae8283 602/* Return 0 if detection is successful, -ENODEV otherwise */
310ec792 603static int adm9240_detect(struct i2c_client *new_client,
7fae8283 604 struct i2c_board_info *info)
40b5cda2 605{
7fae8283 606 struct i2c_adapter *adapter = new_client->adapter;
40b5cda2 607 const char *name = "";
7fae8283 608 int address = new_client->addr;
40b5cda2
GC		 609 u8 man_id, die_rev;
610
611 if (!i2c_check_functionality(adapter, I2C_FUNC_SMBUS_BYTE_DATA))
7fae8283 612 return -ENODEV;
40b5cda2 613
52df6440
JD		 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;
40b5cda2
GC		 620 }
621
52df6440
JD		 622 /* check known chip manufacturer */
623 man_id = i2c_smbus_read_byte_data(new_client, ADM9240_REG_MAN_ID);
624 if (man_id == 0x23) {
40b5cda2 625 name = "adm9240";
52df6440 626 } else if (man_id == 0xda) {
40b5cda2 627 name = "ds1780";
52df6440 628 } else if (man_id == 0x01) {
40b5cda2 629 name = "lm81";
52df6440
JD		 630 } else {
631 dev_err(&adapter->dev, "detect fail: unknown manuf, 0x%02x\n",
632 man_id);
633 return -ENODEV;
40b5cda2 634 }
52df6440
JD		 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
7fae8283 642 strlcpy(info->type, name, I2C_NAME_SIZE);
40b5cda2 643
7fae8283
JD		 644 return 0;
645}
40b5cda2 646
7fae8283
JD		 647static 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
e5ebb772
GR		 653 data = devm_kzalloc(&new_client->dev, sizeof(*data), GFP_KERNEL);
654 if (!data)
655 return -ENOMEM;
7fae8283
JD		 656
657 i2c_set_clientdata(new_client, data);
658 mutex_init(&data->update_lock);
40b5cda2
GC		 659
660 adm9240_init_client(new_client);
661
662 /* populate sysfs filesystem */
c387e4eb
GR		 663 err = sysfs_create_group(&new_client->dev.kobj, &adm9240_group);
664 if (err)
e5ebb772 665 return err;
681c6f7a 666
1beeffe4
TJ		 667 data->hwmon_dev = hwmon_device_register(&new_client->dev);
668 if (IS_ERR(data->hwmon_dev)) {
669 err = PTR_ERR(data->hwmon_dev);
681c6f7a 670 goto exit_remove;
943b0830
MH		 671 }
672
40b5cda2 673 return 0;
943b0830 674
681c6f7a
MH		 675exit_remove:
676 sysfs_remove_group(&new_client->dev.kobj, &adm9240_group);
40b5cda2
GC		 677 return err;
678}
679
7fae8283 680static int adm9240_remove(struct i2c_client *client)
40b5cda2 681{
943b0830 682 struct adm9240_data *data = i2c_get_clientdata(client);
40b5cda2 683
1beeffe4 684 hwmon_device_unregister(data->hwmon_dev);
681c6f7a 685 sysfs_remove_group(&client->dev.kobj, &adm9240_group);
943b0830 686
40b5cda2
GC		 687 return 0;
688}
689
690static void adm9240_init_client(struct i2c_client *client)
691{
692 struct adm9240_data *data = i2c_get_clientdata(client);
205cf13e
GC		 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;
40b5cda2 695
303760b4 696 data->vrm = vid_which_vrm(); /* need this to report vid as mV */
40b5cda2 697
8e8f9289
GC		 698 dev_info(&client->dev, "Using VRM: %d.%d\n", data->vrm / 10,
699 data->vrm % 10);
700
40b5cda2
GC		 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
c387e4eb 709 for (i = 0; i < 6; i++) {
205cf13e 710 i2c_smbus_write_byte_data(client,
40b5cda2 711 ADM9240_REG_IN_MIN(i), 0);
205cf13e 712 i2c_smbus_write_byte_data(client,
40b5cda2
GC		 713 ADM9240_REG_IN_MAX(i), 255);
714 }
205cf13e
GC		 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,
c7461a66 720 ADM9240_REG_TEMP_MAX(0), 127);
205cf13e 721 i2c_smbus_write_byte_data(client,
c7461a66 722 ADM9240_REG_TEMP_MAX(1), 127);
40b5cda2
GC		 723
724 /* start measurement cycle */
205cf13e 725 i2c_smbus_write_byte_data(client, ADM9240_REG_CONFIG, 1);
40b5cda2
GC		 726
727 dev_info(&client->dev, "cold start: config was 0x%02x "
728 "mode %u\n", conf, mode);
729 }
730}
731
732static 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
9a61bf63 738 mutex_lock(&data->update_lock);
40b5cda2
GC		 739
740 /* minimum measurement cycle: 1.75 seconds */
741 if (time_after(jiffies, data->last_updated_measure + (HZ * 7 / 4))
742 || !data->valid) {
743
c387e4eb 744 for (i = 0; i < 6; i++) { /* read voltages */
205cf13e 745 data->in[i] = i2c_smbus_read_byte_data(client,
40b5cda2
GC		 746 ADM9240_REG_IN(i));
747 }
205cf13e 748 data->alarms = i2c_smbus_read_byte_data(client,
40b5cda2 749 ADM9240_REG_INT(0)) |
205cf13e 750 i2c_smbus_read_byte_data(client,
40b5cda2
GC		 751 ADM9240_REG_INT(1)) << 8;
752
c387e4eb
GR		 753 /*
754 * read temperature: assume temperature changes less than
40b5cda2 755 * 0.5'C per two measurement cycles thus ignore possible
c387e4eb
GR		 756 * but unlikely aliasing error on lsb reading. --Grant
757 */
205cf13e 758 data->temp = ((i2c_smbus_read_byte_data(client,
40b5cda2 759 ADM9240_REG_TEMP) << 8) |
205cf13e 760 i2c_smbus_read_byte_data(client,
40b5cda2
GC		 761 ADM9240_REG_TEMP_CONF)) / 128;
762
c387e4eb 763 for (i = 0; i < 2; i++) { /* read fans */
205cf13e 764 data->fan[i] = i2c_smbus_read_byte_data(client,
40b5cda2
GC		 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
c387e4eb 787 for (i = 0; i < 6; i++) {
205cf13e 788 data->in_min[i] = i2c_smbus_read_byte_data(client,
40b5cda2 789 ADM9240_REG_IN_MIN(i));
205cf13e 790 data->in_max[i] = i2c_smbus_read_byte_data(client,
40b5cda2
GC		 791 ADM9240_REG_IN_MAX(i));
792 }
c387e4eb 793 for (i = 0; i < 2; i++) {
205cf13e 794 data->fan_min[i] = i2c_smbus_read_byte_data(client,
40b5cda2
GC		 795 ADM9240_REG_FAN_MIN(i));
796 }
c7461a66
GC		 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));
40b5cda2
GC		 801
802 /* read fan divs and 5-bit VID */
205cf13e 803 i = i2c_smbus_read_byte_data(client, ADM9240_REG_VID_FAN_DIV);
40b5cda2
GC		 804 data->fan_div[0] = (i >> 4) & 3;
805 data->fan_div[1] = (i >> 6) & 3;
806 data->vid = i & 0x0f;
205cf13e 807 data->vid |= (i2c_smbus_read_byte_data(client,
40b5cda2
GC		 808 ADM9240_REG_VID4) & 1) << 4;
809 /* read analog out */
205cf13e 810 data->aout = i2c_smbus_read_byte_data(client,
40b5cda2
GC		 811 ADM9240_REG_ANALOG_OUT);
812
813 data->last_updated_config = jiffies;
814 data->valid = 1;
815 }
9a61bf63 816 mutex_unlock(&data->update_lock);
40b5cda2
GC		 817 return data;
818}
819
f0967eea 820module_i2c_driver(adm9240_driver);
40b5cda2
GC		 821
822MODULE_AUTHOR("Michiel Rook <michiel@grendelproject.nl>, "
2ca7b961 823 "Grant Coady <gcoady.lk@gmail.com> and others");
40b5cda2
GC		 824MODULE_DESCRIPTION("ADM9240/DS1780/LM81 driver");
825MODULE_LICENSE("GPL");
Linux 6.x block layer and io_uring tree(s)