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hwmon: (adm9240) Create functions for updating measure and config
[mirror_ubuntu-hirsute-kernel.git] / drivers / hwmon / adm9240.c
CommitLineData
74ba9207 1// SPDX-License-Identifier: GPL-2.0-or-later
40b5cda2
GC		 2/*
3 * adm9240.c Part of lm_sensors, Linux kernel modules for hardware
c387e4eb 4 * monitoring
40b5cda2
GC		 5 *
6 * Copyright (C) 1999 Frodo Looijaard <frodol@dds.nl>
7 * Philip Edelbrock <phil@netroedge.com>
8 * Copyright (C) 2003 Michiel Rook <michiel@grendelproject.nl>
2ca7b961 9 * Copyright (C) 2005 Grant Coady <gcoady.lk@gmail.com> with valuable
c387e4eb 10 * guidance from Jean Delvare
40b5cda2
GC		 11 *
12 * Driver supports Analog Devices ADM9240
13 * Dallas Semiconductor DS1780
14 * National Semiconductor LM81
15 *
16 * ADM9240 is the reference, DS1780 and LM81 are register compatibles
17 *
18 * Voltage Six inputs are scaled by chip, VID also reported
19 * Temperature Chip temperature to 0.5'C, maximum and max_hysteris
20 * Fans 2 fans, low speed alarm, automatic fan clock divider
21 * Alarms 16-bit map of active alarms
22 * Analog Out 0..1250 mV output
23 *
0de2b244 24 * Chassis Intrusion: clear CI latch with 'echo 0 > intrusion0_alarm'
40b5cda2
GC		 25 *
26 * Test hardware: Intel SE440BX-2 desktop motherboard --Grant
27 *
28 * LM81 extended temp reading not implemented
40b5cda2
GC		 29 */
30
31#include <linux/init.h>
32#include <linux/module.h>
33#include <linux/slab.h>
34#include <linux/i2c.h>
c7461a66 35#include <linux/hwmon-sysfs.h>
943b0830 36#include <linux/hwmon.h>
303760b4 37#include <linux/hwmon-vid.h>
943b0830 38#include <linux/err.h>
9a61bf63 39#include <linux/mutex.h>
dcd8f392 40#include <linux/jiffies.h>
40b5cda2
GC		 41
42/* Addresses to scan */
25e9c86d 43static const unsigned short normal_i2c[] = { 0x2c, 0x2d, 0x2e, 0x2f,
40b5cda2
GC		 44 I2C_CLIENT_END };
45
e5e9f44c 46enum chips { adm9240, ds1780, lm81 };
40b5cda2
GC		 47
48/* ADM9240 registers */
49#define ADM9240_REG_MAN_ID 0x3e
50#define ADM9240_REG_DIE_REV 0x3f
51#define ADM9240_REG_CONFIG 0x40
52
53#define ADM9240_REG_IN(nr) (0x20 + (nr)) /* 0..5 */
54#define ADM9240_REG_IN_MAX(nr) (0x2b + (nr) * 2)
55#define ADM9240_REG_IN_MIN(nr) (0x2c + (nr) * 2)
56#define ADM9240_REG_FAN(nr) (0x28 + (nr)) /* 0..1 */
57#define ADM9240_REG_FAN_MIN(nr) (0x3b + (nr))
58#define ADM9240_REG_INT(nr) (0x41 + (nr))
59#define ADM9240_REG_INT_MASK(nr) (0x43 + (nr))
60#define ADM9240_REG_TEMP 0x27
c7461a66 61#define ADM9240_REG_TEMP_MAX(nr) (0x39 + (nr)) /* 0, 1 = high, hyst */
40b5cda2
GC		 62#define ADM9240_REG_ANALOG_OUT 0x19
63#define ADM9240_REG_CHASSIS_CLEAR 0x46
64#define ADM9240_REG_VID_FAN_DIV 0x47
65#define ADM9240_REG_I2C_ADDR 0x48
66#define ADM9240_REG_VID4 0x49
67#define ADM9240_REG_TEMP_CONF 0x4b
68
69/* generalised scaling with integer rounding */
70static inline int SCALE(long val, int mul, int div)
71{
72 if (val < 0)
73 return (val * mul - div / 2) / div;
74 else
75 return (val * mul + div / 2) / div;
76}
77
78/* adm9240 internally scales voltage measurements */
79static const u16 nom_mv[] = { 2500, 2700, 3300, 5000, 12000, 2700 };
80
81static inline unsigned int IN_FROM_REG(u8 reg, int n)
82{
83 return SCALE(reg, nom_mv[n], 192);
84}
85
86static inline u8 IN_TO_REG(unsigned long val, int n)
87{
0fb620c4
GR		 88 val = clamp_val(val, 0, nom_mv[n] * 255 / 192);
89 return SCALE(val, 192, nom_mv[n]);
40b5cda2
GC		 90}
91
92/* temperature range: -40..125, 127 disables temperature alarm */
93static inline s8 TEMP_TO_REG(long val)
94{
0fb620c4
GR		 95 val = clamp_val(val, -40000, 127000);
96 return SCALE(val, 1, 1000);
40b5cda2
GC		 97}
98
99/* two fans, each with low fan speed limit */
100static inline unsigned int FAN_FROM_REG(u8 reg, u8 div)
101{
102 if (!reg) /* error */
103 return -1;
104
105 if (reg == 255)
106 return 0;
107
108 return SCALE(1350000, 1, reg * div);
109}
110
111/* analog out 0..1250mV */
112static inline u8 AOUT_TO_REG(unsigned long val)
113{
0fb620c4
GR		 114 val = clamp_val(val, 0, 1250);
115 return SCALE(val, 255, 1250);
40b5cda2
GC		 116}
117
118static inline unsigned int AOUT_FROM_REG(u8 reg)
119{
120 return SCALE(reg, 1250, 255);
121}
122
40b5cda2
GC		 123/* per client data */
124struct adm9240_data {
715f69be 125 struct i2c_client *client;
9a61bf63 126 struct mutex update_lock;
40b5cda2
GC		 127 char valid;
128 unsigned long last_updated_measure;
129 unsigned long last_updated_config;
130
131 u8 in[6]; /* ro in0_input */
132 u8 in_max[6]; /* rw in0_max */
133 u8 in_min[6]; /* rw in0_min */
134 u8 fan[2]; /* ro fan1_input */
135 u8 fan_min[2]; /* rw fan1_min */
136 u8 fan_div[2]; /* rw fan1_div, read-only accessor */
137 s16 temp; /* ro temp1_input, 9-bit sign-extended */
c7461a66 138 s8 temp_max[2]; /* rw 0 -> temp_max, 1 -> temp_max_hyst */
40b5cda2 139 u16 alarms; /* ro alarms */
8e8f9289 140 u8 aout; /* rw aout_output */
40b5cda2
GC		 141 u8 vid; /* ro vid */
142 u8 vrm; /* -- vrm set on startup, no accessor */
143};
144
4341fc3f
AL		 145/* write new fan div, callers must hold data->update_lock */
146static void adm9240_write_fan_div(struct i2c_client *client, int nr,
147 u8 fan_div)
148{
149 u8 reg, old, shift = (nr + 2) * 2;
150
151 reg = i2c_smbus_read_byte_data(client, ADM9240_REG_VID_FAN_DIV);
152 old = (reg >> shift) & 3;
153 reg &= ~(3 << shift);
154 reg |= (fan_div << shift);
155 i2c_smbus_write_byte_data(client, ADM9240_REG_VID_FAN_DIV, reg);
156 dev_dbg(&client->dev,
157 "fan%d clock divider changed from %u to %u\n",
158 nr + 1, 1 << old, 1 << fan_div);
159}
160
6a8cdd14
CP		 161static int adm9240_update_measure(struct adm9240_data *data)
162{
163 struct i2c_client *client = data->client;
164 int i;
165
166 for (i = 0; i < 6; i++) { /* read voltages */
167 data->in[i] = i2c_smbus_read_byte_data(client,
168 ADM9240_REG_IN(i));
169 }
170 data->alarms = i2c_smbus_read_byte_data(client,
171 ADM9240_REG_INT(0)) |
172 i2c_smbus_read_byte_data(client,
173 ADM9240_REG_INT(1)) << 8;
174
175 /*
176 * read temperature: assume temperature changes less than
177 * 0.5'C per two measurement cycles thus ignore possible
178 * but unlikely aliasing error on lsb reading. --Grant
179 */
180 data->temp = (i2c_smbus_read_byte_data(client,
181 ADM9240_REG_TEMP) << 8) |
182 i2c_smbus_read_byte_data(client,
183 ADM9240_REG_TEMP_CONF);
184
185 for (i = 0; i < 2; i++) { /* read fans */
186 data->fan[i] = i2c_smbus_read_byte_data(client,
187 ADM9240_REG_FAN(i));
188
189 /* adjust fan clock divider on overflow */
190 if (data->valid && data->fan[i] == 255 &&
191 data->fan_div[i] < 3) {
192
193 adm9240_write_fan_div(client, i,
194 ++data->fan_div[i]);
195
196 /* adjust fan_min if active, but not to 0 */
197 if (data->fan_min[i] < 255 &&
198 data->fan_min[i] >= 2)
199 data->fan_min[i] /= 2;
200 }
201 }
202
203 return 0;
204}
205
206static int adm9240_update_config(struct adm9240_data *data)
4341fc3f 207{
715f69be 208 struct i2c_client *client = data->client;
4341fc3f
AL		 209 int i;
210
6a8cdd14
CP		 211 for (i = 0; i < 6; i++) {
212 data->in_min[i] = i2c_smbus_read_byte_data(client,
213 ADM9240_REG_IN_MIN(i));
214 data->in_max[i] = i2c_smbus_read_byte_data(client,
215 ADM9240_REG_IN_MAX(i));
216 }
217 for (i = 0; i < 2; i++) {
218 data->fan_min[i] = i2c_smbus_read_byte_data(client,
219 ADM9240_REG_FAN_MIN(i));
220 }
221 for (i = 0; i < 2; i++) {
222 data->temp_max[i] = i2c_smbus_read_byte_data(client,
223 ADM9240_REG_TEMP_MAX(i));
224 }
225
226 /* read fan divs and 5-bit VID */
227 i = i2c_smbus_read_byte_data(client, ADM9240_REG_VID_FAN_DIV);
228 data->fan_div[0] = (i >> 4) & 3;
229 data->fan_div[1] = (i >> 6) & 3;
230 data->vid = i & 0x0f;
231 data->vid |= (i2c_smbus_read_byte_data(client,
232 ADM9240_REG_VID4) & 1) << 4;
233 /* read analog out */
234 data->aout = i2c_smbus_read_byte_data(client,
235 ADM9240_REG_ANALOG_OUT);
236
237 return 0;
238}
239
240static struct adm9240_data *adm9240_update_device(struct device *dev)
241{
242 struct adm9240_data *data = dev_get_drvdata(dev);
243 int err;
244
4341fc3f
AL		 245 mutex_lock(&data->update_lock);
246
247 /* minimum measurement cycle: 1.75 seconds */
248 if (time_after(jiffies, data->last_updated_measure + (HZ * 7 / 4))
249 || !data->valid) {
6a8cdd14
CP		 250 err = adm9240_update_measure(data);
251 if (err < 0) {
252 data->valid = 0;
253 mutex_unlock(&data->update_lock);
254 return ERR_PTR(err);
4341fc3f
AL		 255 }
256 data->last_updated_measure = jiffies;
257 }
258
259 /* minimum config reading cycle: 300 seconds */
260 if (time_after(jiffies, data->last_updated_config + (HZ * 300))
261 || !data->valid) {
6a8cdd14
CP		 262 err = adm9240_update_config(data);
263 if (err < 0) {
264 data->valid = 0;
265 mutex_unlock(&data->update_lock);
266 return ERR_PTR(err);
4341fc3f 267 }
4341fc3f
AL		 268 data->last_updated_config = jiffies;
269 data->valid = 1;
270 }
271 mutex_unlock(&data->update_lock);
272 return data;
273}
274
40b5cda2
GC		 275/*** sysfs accessors ***/
276
277/* temperature */
b5751116
JL		 278static ssize_t temp1_input_show(struct device *dev,
279 struct device_attribute *dummy, char *buf)
c7461a66
GC		 280{
281 struct adm9240_data *data = adm9240_update_device(dev);
6a8cdd14
CP		 282
283 if (IS_ERR(data))
284 return PTR_ERR(data);
285
667f4bab 286 return sprintf(buf, "%d\n", data->temp / 128 * 500); /* 9-bit value */
c7461a66
GC		 287}
288
7352ae8d
GR		 289static ssize_t max_show(struct device *dev, struct device_attribute *devattr,
290 char *buf)
c7461a66
GC		 291{
292 struct sensor_device_attribute *attr = to_sensor_dev_attr(devattr);
293 struct adm9240_data *data = adm9240_update_device(dev);
6a8cdd14
CP		 294
295 if (IS_ERR(data))
296 return PTR_ERR(data);
297
c7461a66
GC		 298 return sprintf(buf, "%d\n", data->temp_max[attr->index] * 1000);
299}
300
7352ae8d
GR		 301static ssize_t max_store(struct device *dev, struct device_attribute *devattr,
302 const char *buf, size_t count)
c7461a66
GC		 303{
304 struct sensor_device_attribute *attr = to_sensor_dev_attr(devattr);
715f69be
AL		 305 struct adm9240_data *data = dev_get_drvdata(dev);
306 struct i2c_client *client = data->client;
c387e4eb
GR		 307 long val;
308 int err;
309
310 err = kstrtol(buf, 10, &val);
311 if (err)
312 return err;
c7461a66 313
9a61bf63 314 mutex_lock(&data->update_lock);
c7461a66
GC		 315 data->temp_max[attr->index] = TEMP_TO_REG(val);
316 i2c_smbus_write_byte_data(client, ADM9240_REG_TEMP_MAX(attr->index),
317 data->temp_max[attr->index]);
9a61bf63 318 mutex_unlock(&data->update_lock);
c7461a66
GC		 319 return count;
320}
321
b5751116 322static DEVICE_ATTR_RO(temp1_input);
7352ae8d
GR		 323static SENSOR_DEVICE_ATTR_RW(temp1_max, max, 0);
324static SENSOR_DEVICE_ATTR_RW(temp1_max_hyst, max, 1);
40b5cda2
GC		 325
326/* voltage */
7352ae8d
GR		 327static ssize_t in_show(struct device *dev, struct device_attribute *devattr,
328 char *buf)
40b5cda2 329{
c7461a66 330 struct sensor_device_attribute *attr = to_sensor_dev_attr(devattr);
40b5cda2 331 struct adm9240_data *data = adm9240_update_device(dev);
6a8cdd14
CP		 332
333 if (IS_ERR(data))
334 return PTR_ERR(data);
335
c7461a66
GC		 336 return sprintf(buf, "%d\n", IN_FROM_REG(data->in[attr->index],
337 attr->index));
40b5cda2
GC		 338}
339
7352ae8d
GR		 340static ssize_t in_min_show(struct device *dev,
341 struct device_attribute *devattr, char *buf)
40b5cda2 342{
c7461a66 343 struct sensor_device_attribute *attr = to_sensor_dev_attr(devattr);
40b5cda2 344 struct adm9240_data *data = adm9240_update_device(dev);
6a8cdd14
CP		 345
346 if (IS_ERR(data))
347 return PTR_ERR(data);
348
c7461a66
GC		 349 return sprintf(buf, "%d\n", IN_FROM_REG(data->in_min[attr->index],
350 attr->index));
40b5cda2
GC		 351}
352
7352ae8d
GR		 353static ssize_t in_max_show(struct device *dev,
354 struct device_attribute *devattr, char *buf)
40b5cda2 355{
c7461a66 356 struct sensor_device_attribute *attr = to_sensor_dev_attr(devattr);
40b5cda2 357 struct adm9240_data *data = adm9240_update_device(dev);
6a8cdd14
CP		 358
359 if (IS_ERR(data))
360 return PTR_ERR(data);
361
c7461a66
GC		 362 return sprintf(buf, "%d\n", IN_FROM_REG(data->in_max[attr->index],
363 attr->index));
40b5cda2
GC		 364}
365
7352ae8d
GR		 366static ssize_t in_min_store(struct device *dev,
367 struct device_attribute *devattr, const char *buf,
368 size_t count)
40b5cda2 369{
c7461a66 370 struct sensor_device_attribute *attr = to_sensor_dev_attr(devattr);
715f69be
AL		 371 struct adm9240_data *data = dev_get_drvdata(dev);
372 struct i2c_client *client = data->client;
c387e4eb
GR		 373 unsigned long val;
374 int err;
375
376 err = kstrtoul(buf, 10, &val);
377 if (err)
378 return err;
40b5cda2 379
9a61bf63 380 mutex_lock(&data->update_lock);
c7461a66
GC		 381 data->in_min[attr->index] = IN_TO_REG(val, attr->index);
382 i2c_smbus_write_byte_data(client, ADM9240_REG_IN_MIN(attr->index),
383 data->in_min[attr->index]);
9a61bf63 384 mutex_unlock(&data->update_lock);
40b5cda2
GC		 385 return count;
386}
387
7352ae8d
GR		 388static ssize_t in_max_store(struct device *dev,
389 struct device_attribute *devattr, const char *buf,
390 size_t count)
40b5cda2 391{
c7461a66 392 struct sensor_device_attribute *attr = to_sensor_dev_attr(devattr);
715f69be
AL		 393 struct adm9240_data *data = dev_get_drvdata(dev);
394 struct i2c_client *client = data->client;
c387e4eb
GR		 395 unsigned long val;
396 int err;
397
398 err = kstrtoul(buf, 10, &val);
399 if (err)
400 return err;
40b5cda2 401
9a61bf63 402 mutex_lock(&data->update_lock);
c7461a66
GC		 403 data->in_max[attr->index] = IN_TO_REG(val, attr->index);
404 i2c_smbus_write_byte_data(client, ADM9240_REG_IN_MAX(attr->index),
405 data->in_max[attr->index]);
9a61bf63 406 mutex_unlock(&data->update_lock);
40b5cda2
GC		 407 return count;
408}
409
7352ae8d
GR		 410static SENSOR_DEVICE_ATTR_RO(in0_input, in, 0);
411static SENSOR_DEVICE_ATTR_RW(in0_min, in_min, 0);
412static SENSOR_DEVICE_ATTR_RW(in0_max, in_max, 0);
413static SENSOR_DEVICE_ATTR_RO(in1_input, in, 1);
414static SENSOR_DEVICE_ATTR_RW(in1_min, in_min, 1);
415static SENSOR_DEVICE_ATTR_RW(in1_max, in_max, 1);
416static SENSOR_DEVICE_ATTR_RO(in2_input, in, 2);
417static SENSOR_DEVICE_ATTR_RW(in2_min, in_min, 2);
418static SENSOR_DEVICE_ATTR_RW(in2_max, in_max, 2);
419static SENSOR_DEVICE_ATTR_RO(in3_input, in, 3);
420static SENSOR_DEVICE_ATTR_RW(in3_min, in_min, 3);
421static SENSOR_DEVICE_ATTR_RW(in3_max, in_max, 3);
422static SENSOR_DEVICE_ATTR_RO(in4_input, in, 4);
423static SENSOR_DEVICE_ATTR_RW(in4_min, in_min, 4);
424static SENSOR_DEVICE_ATTR_RW(in4_max, in_max, 4);
425static SENSOR_DEVICE_ATTR_RO(in5_input, in, 5);
426static SENSOR_DEVICE_ATTR_RW(in5_min, in_min, 5);
427static SENSOR_DEVICE_ATTR_RW(in5_max, in_max, 5);
40b5cda2
GC		 428
429/* fans */
7352ae8d
GR		 430static ssize_t fan_show(struct device *dev, struct device_attribute *devattr,
431 char *buf)
40b5cda2 432{
c7461a66 433 struct sensor_device_attribute *attr = to_sensor_dev_attr(devattr);
40b5cda2 434 struct adm9240_data *data = adm9240_update_device(dev);
6a8cdd14
CP		 435
436 if (IS_ERR(data))
437 return PTR_ERR(data);
438
c7461a66
GC		 439 return sprintf(buf, "%d\n", FAN_FROM_REG(data->fan[attr->index],
440 1 << data->fan_div[attr->index]));
40b5cda2
GC		 441}
442
7352ae8d
GR		 443static ssize_t fan_min_show(struct device *dev,
444 struct device_attribute *devattr, char *buf)
40b5cda2 445{
c7461a66 446 struct sensor_device_attribute *attr = to_sensor_dev_attr(devattr);
40b5cda2 447 struct adm9240_data *data = adm9240_update_device(dev);
6a8cdd14
CP		 448
449 if (IS_ERR(data))
450 return PTR_ERR(data);
451
c7461a66
GC		 452 return sprintf(buf, "%d\n", FAN_FROM_REG(data->fan_min[attr->index],
453 1 << data->fan_div[attr->index]));
40b5cda2
GC		 454}
455
7352ae8d
GR		 456static ssize_t fan_div_show(struct device *dev,
457 struct device_attribute *devattr, char *buf)
40b5cda2 458{
c7461a66 459 struct sensor_device_attribute *attr = to_sensor_dev_attr(devattr);
40b5cda2 460 struct adm9240_data *data = adm9240_update_device(dev);
6a8cdd14
CP		 461
462 if (IS_ERR(data))
463 return PTR_ERR(data);
464
c7461a66 465 return sprintf(buf, "%d\n", 1 << data->fan_div[attr->index]);
40b5cda2
GC		 466}
467
e415e48b 468/*
40b5cda2
GC		 469 * set fan speed low limit:
470 *
471 * - value is zero: disable fan speed low limit alarm
472 *
473 * - value is below fan speed measurement range: enable fan speed low
474 * limit alarm to be asserted while fan speed too slow to measure
475 *
476 * - otherwise: select fan clock divider to suit fan speed low limit,
477 * measurement code may adjust registers to ensure fan speed reading
478 */
7352ae8d
GR		 479static ssize_t fan_min_store(struct device *dev,
480 struct device_attribute *devattr,
481 const char *buf, size_t count)
40b5cda2 482{
c7461a66 483 struct sensor_device_attribute *attr = to_sensor_dev_attr(devattr);
715f69be
AL		 484 struct adm9240_data *data = dev_get_drvdata(dev);
485 struct i2c_client *client = data->client;
c7461a66 486 int nr = attr->index;
40b5cda2 487 u8 new_div;
c387e4eb
GR		 488 unsigned long val;
489 int err;
490
491 err = kstrtoul(buf, 10, &val);
492 if (err)
493 return err;
40b5cda2 494
9a61bf63 495 mutex_lock(&data->update_lock);
40b5cda2
GC		 496
497 if (!val) {
498 data->fan_min[nr] = 255;
499 new_div = data->fan_div[nr];
500
501 dev_dbg(&client->dev, "fan%u low limit set disabled\n",
502 nr + 1);
503
504 } else if (val < 1350000 / (8 * 254)) {
505 new_div = 3;
506 data->fan_min[nr] = 254;
507
508 dev_dbg(&client->dev, "fan%u low limit set minimum %u\n",
509 nr + 1, FAN_FROM_REG(254, 1 << new_div));
510
511 } else {
512 unsigned int new_min = 1350000 / val;
513
514 new_div = 0;
515 while (new_min > 192 && new_div < 3) {
516 new_div++;
517 new_min /= 2;
518 }
519 if (!new_min) /* keep > 0 */
520 new_min++;
521
522 data->fan_min[nr] = new_min;
523
524 dev_dbg(&client->dev, "fan%u low limit set fan speed %u\n",
525 nr + 1, FAN_FROM_REG(new_min, 1 << new_div));
526 }
527
528 if (new_div != data->fan_div[nr]) {
529 data->fan_div[nr] = new_div;
530 adm9240_write_fan_div(client, nr, new_div);
531 }
205cf13e 532 i2c_smbus_write_byte_data(client, ADM9240_REG_FAN_MIN(nr),
40b5cda2
GC		 533 data->fan_min[nr]);
534
9a61bf63 535 mutex_unlock(&data->update_lock);
40b5cda2
GC		 536 return count;
537}
538
7352ae8d
GR		 539static SENSOR_DEVICE_ATTR_RO(fan1_input, fan, 0);
540static SENSOR_DEVICE_ATTR_RW(fan1_min, fan_min, 0);
541static SENSOR_DEVICE_ATTR_RO(fan1_div, fan_div, 0);
542static SENSOR_DEVICE_ATTR_RO(fan2_input, fan, 1);
543static SENSOR_DEVICE_ATTR_RW(fan2_min, fan_min, 1);
544static SENSOR_DEVICE_ATTR_RO(fan2_div, fan_div, 1);
40b5cda2
GC		 545
546/* alarms */
b5751116 547static ssize_t alarms_show(struct device *dev,
e415e48b 548 struct device_attribute *attr, char *buf)
40b5cda2
GC		 549{
550 struct adm9240_data *data = adm9240_update_device(dev);
6a8cdd14
CP		 551
552 if (IS_ERR(data))
553 return PTR_ERR(data);
554
40b5cda2
GC		 555 return sprintf(buf, "%u\n", data->alarms);
556}
b5751116 557static DEVICE_ATTR_RO(alarms);
40b5cda2 558
7352ae8d
GR		 559static ssize_t alarm_show(struct device *dev, struct device_attribute *attr,
560 char *buf)
360f9452
JD		 561{
562 int bitnr = to_sensor_dev_attr(attr)->index;
563 struct adm9240_data *data = adm9240_update_device(dev);
6a8cdd14
CP		 564
565 if (IS_ERR(data))
566 return PTR_ERR(data);
567
360f9452
JD		 568 return sprintf(buf, "%u\n", (data->alarms >> bitnr) & 1);
569}
7352ae8d
GR		 570static SENSOR_DEVICE_ATTR_RO(in0_alarm, alarm, 0);
571static SENSOR_DEVICE_ATTR_RO(in1_alarm, alarm, 1);
572static SENSOR_DEVICE_ATTR_RO(in2_alarm, alarm, 2);
573static SENSOR_DEVICE_ATTR_RO(in3_alarm, alarm, 3);
574static SENSOR_DEVICE_ATTR_RO(in4_alarm, alarm, 8);
575static SENSOR_DEVICE_ATTR_RO(in5_alarm, alarm, 9);
576static SENSOR_DEVICE_ATTR_RO(temp1_alarm, alarm, 4);
577static SENSOR_DEVICE_ATTR_RO(fan1_alarm, alarm, 6);
578static SENSOR_DEVICE_ATTR_RO(fan2_alarm, alarm, 7);
360f9452 579
40b5cda2 580/* vid */
b5751116
JL		 581static ssize_t cpu0_vid_show(struct device *dev,
582 struct device_attribute *attr, char *buf)
40b5cda2
GC		 583{
584 struct adm9240_data *data = adm9240_update_device(dev);
6a8cdd14
CP		 585
586 if (IS_ERR(data))
587 return PTR_ERR(data);
588
40b5cda2
GC		 589 return sprintf(buf, "%d\n", vid_from_reg(data->vid, data->vrm));
590}
b5751116 591static DEVICE_ATTR_RO(cpu0_vid);
40b5cda2
GC		 592
593/* analog output */
b5751116
JL		 594static ssize_t aout_output_show(struct device *dev,
595 struct device_attribute *attr, char *buf)
40b5cda2
GC		 596{
597 struct adm9240_data *data = adm9240_update_device(dev);
6a8cdd14
CP		 598
599 if (IS_ERR(data))
600 return PTR_ERR(data);
601
40b5cda2
GC		 602 return sprintf(buf, "%d\n", AOUT_FROM_REG(data->aout));
603}
604
b5751116
JL		 605static ssize_t aout_output_store(struct device *dev,
606 struct device_attribute *attr,
607 const char *buf, size_t count)
40b5cda2 608{
715f69be
AL		 609 struct adm9240_data *data = dev_get_drvdata(dev);
610 struct i2c_client *client = data->client;
c387e4eb
GR		 611 long val;
612 int err;
613
614 err = kstrtol(buf, 10, &val);
615 if (err)
616 return err;
40b5cda2 617
9a61bf63 618 mutex_lock(&data->update_lock);
40b5cda2 619 data->aout = AOUT_TO_REG(val);
205cf13e 620 i2c_smbus_write_byte_data(client, ADM9240_REG_ANALOG_OUT, data->aout);
9a61bf63 621 mutex_unlock(&data->update_lock);
40b5cda2
GC		 622 return count;
623}
b5751116 624static DEVICE_ATTR_RW(aout_output);
40b5cda2 625
7352ae8d
GR		 626static ssize_t alarm_store(struct device *dev, struct device_attribute *attr,
627 const char *buf, size_t count)
0de2b244 628{
715f69be
AL		 629 struct adm9240_data *data = dev_get_drvdata(dev);
630 struct i2c_client *client = data->client;
0de2b244
JD		 631 unsigned long val;
632
179c4fdb 633 if (kstrtoul(buf, 10, &val) || val != 0)
0de2b244
JD		 634 return -EINVAL;
635
636 mutex_lock(&data->update_lock);
637 i2c_smbus_write_byte_data(client, ADM9240_REG_CHASSIS_CLEAR, 0x80);
638 data->valid = 0; /* Force cache refresh */
639 mutex_unlock(&data->update_lock);
640 dev_dbg(&client->dev, "chassis intrusion latch cleared\n");
641
642 return count;
643}
7352ae8d 644static SENSOR_DEVICE_ATTR_RW(intrusion0_alarm, alarm, 12);
40b5cda2 645
715f69be 646static struct attribute *adm9240_attrs[] = {
681c6f7a
MH		 647 &sensor_dev_attr_in0_input.dev_attr.attr,
648 &sensor_dev_attr_in0_min.dev_attr.attr,
649 &sensor_dev_attr_in0_max.dev_attr.attr,
360f9452 650 &sensor_dev_attr_in0_alarm.dev_attr.attr,
681c6f7a
MH		 651 &sensor_dev_attr_in1_input.dev_attr.attr,
652 &sensor_dev_attr_in1_min.dev_attr.attr,
653 &sensor_dev_attr_in1_max.dev_attr.attr,
360f9452 654 &sensor_dev_attr_in1_alarm.dev_attr.attr,
681c6f7a
MH		 655 &sensor_dev_attr_in2_input.dev_attr.attr,
656 &sensor_dev_attr_in2_min.dev_attr.attr,
657 &sensor_dev_attr_in2_max.dev_attr.attr,
360f9452 658 &sensor_dev_attr_in2_alarm.dev_attr.attr,
681c6f7a
MH		 659 &sensor_dev_attr_in3_input.dev_attr.attr,
660 &sensor_dev_attr_in3_min.dev_attr.attr,
661 &sensor_dev_attr_in3_max.dev_attr.attr,
360f9452 662 &sensor_dev_attr_in3_alarm.dev_attr.attr,
681c6f7a
MH		 663 &sensor_dev_attr_in4_input.dev_attr.attr,
664 &sensor_dev_attr_in4_min.dev_attr.attr,
665 &sensor_dev_attr_in4_max.dev_attr.attr,
360f9452 666 &sensor_dev_attr_in4_alarm.dev_attr.attr,
681c6f7a
MH		 667 &sensor_dev_attr_in5_input.dev_attr.attr,
668 &sensor_dev_attr_in5_min.dev_attr.attr,
669 &sensor_dev_attr_in5_max.dev_attr.attr,
360f9452 670 &sensor_dev_attr_in5_alarm.dev_attr.attr,
681c6f7a
MH		 671 &dev_attr_temp1_input.attr,
672 &sensor_dev_attr_temp1_max.dev_attr.attr,
673 &sensor_dev_attr_temp1_max_hyst.dev_attr.attr,
360f9452 674 &sensor_dev_attr_temp1_alarm.dev_attr.attr,
681c6f7a
MH		 675 &sensor_dev_attr_fan1_input.dev_attr.attr,
676 &sensor_dev_attr_fan1_div.dev_attr.attr,
677 &sensor_dev_attr_fan1_min.dev_attr.attr,
360f9452 678 &sensor_dev_attr_fan1_alarm.dev_attr.attr,
681c6f7a
MH		 679 &sensor_dev_attr_fan2_input.dev_attr.attr,
680 &sensor_dev_attr_fan2_div.dev_attr.attr,
681 &sensor_dev_attr_fan2_min.dev_attr.attr,
360f9452 682 &sensor_dev_attr_fan2_alarm.dev_attr.attr,
681c6f7a
MH		 683 &dev_attr_alarms.attr,
684 &dev_attr_aout_output.attr,
0de2b244 685 &sensor_dev_attr_intrusion0_alarm.dev_attr.attr,
681c6f7a
MH		 686 &dev_attr_cpu0_vid.attr,
687 NULL
688};
689
715f69be 690ATTRIBUTE_GROUPS(adm9240);
681c6f7a 691
40b5cda2
GC		 692/*** sensor chip detect and driver install ***/
693
7fae8283 694/* Return 0 if detection is successful, -ENODEV otherwise */
310ec792 695static int adm9240_detect(struct i2c_client *new_client,
7fae8283 696 struct i2c_board_info *info)
40b5cda2 697{
7fae8283 698 struct i2c_adapter *adapter = new_client->adapter;
40b5cda2 699 const char *name = "";
7fae8283 700 int address = new_client->addr;
40b5cda2
GC		 701 u8 man_id, die_rev;
702
703 if (!i2c_check_functionality(adapter, I2C_FUNC_SMBUS_BYTE_DATA))
7fae8283 704 return -ENODEV;
40b5cda2 705
52df6440
JD		 706 /* verify chip: reg address should match i2c address */
707 if (i2c_smbus_read_byte_data(new_client, ADM9240_REG_I2C_ADDR)
708 != address) {
709 dev_err(&adapter->dev, "detect fail: address match, 0x%02x\n",
710 address);
711 return -ENODEV;
40b5cda2
GC		 712 }
713
52df6440
JD		 714 /* check known chip manufacturer */
715 man_id = i2c_smbus_read_byte_data(new_client, ADM9240_REG_MAN_ID);
716 if (man_id == 0x23) {
40b5cda2 717 name = "adm9240";
52df6440 718 } else if (man_id == 0xda) {
40b5cda2 719 name = "ds1780";
52df6440 720 } else if (man_id == 0x01) {
40b5cda2 721 name = "lm81";
52df6440
JD		 722 } else {
723 dev_err(&adapter->dev, "detect fail: unknown manuf, 0x%02x\n",
724 man_id);
725 return -ENODEV;
40b5cda2 726 }
52df6440
JD		 727
728 /* successful detect, print chip info */
729 die_rev = i2c_smbus_read_byte_data(new_client, ADM9240_REG_DIE_REV);
730 dev_info(&adapter->dev, "found %s revision %u\n",
731 man_id == 0x23 ? "ADM9240" :
732 man_id == 0xda ? "DS1780" : "LM81", die_rev);
733
7fae8283 734 strlcpy(info->type, name, I2C_NAME_SIZE);
40b5cda2 735
7fae8283
JD		 736 return 0;
737}
40b5cda2 738
40b5cda2
GC		 739static void adm9240_init_client(struct i2c_client *client)
740{
741 struct adm9240_data *data = i2c_get_clientdata(client);
205cf13e
GC		 742 u8 conf = i2c_smbus_read_byte_data(client, ADM9240_REG_CONFIG);
743 u8 mode = i2c_smbus_read_byte_data(client, ADM9240_REG_TEMP_CONF) & 3;
40b5cda2 744
303760b4 745 data->vrm = vid_which_vrm(); /* need this to report vid as mV */
40b5cda2 746
8e8f9289
GC		 747 dev_info(&client->dev, "Using VRM: %d.%d\n", data->vrm / 10,
748 data->vrm % 10);
749
40b5cda2
GC		 750 if (conf & 1) { /* measurement cycle running: report state */
751
752 dev_info(&client->dev, "status: config 0x%02x mode %u\n",
753 conf, mode);
754
755 } else { /* cold start: open limits before starting chip */
756 int i;
757
c387e4eb 758 for (i = 0; i < 6; i++) {
205cf13e 759 i2c_smbus_write_byte_data(client,
40b5cda2 760 ADM9240_REG_IN_MIN(i), 0);
205cf13e 761 i2c_smbus_write_byte_data(client,
40b5cda2
GC		 762 ADM9240_REG_IN_MAX(i), 255);
763 }
10d09773
CP		 764 for (i = 0; i < 2; i++) {
765 i2c_smbus_write_byte_data(client,
766 ADM9240_REG_FAN_MIN(i), 255);
767 }
768 for (i = 0; i < 2; i++) {
769 i2c_smbus_write_byte_data(client,
770 ADM9240_REG_TEMP_MAX(i), 127);
771 }
40b5cda2
GC		 772
773 /* start measurement cycle */
205cf13e 774 i2c_smbus_write_byte_data(client, ADM9240_REG_CONFIG, 1);
40b5cda2 775
b55f3757
GR		 776 dev_info(&client->dev,
777 "cold start: config was 0x%02x mode %u\n", conf, mode);
40b5cda2
GC		 778 }
779}
780
67487038 781static int adm9240_probe(struct i2c_client *new_client)
40b5cda2 782{
715f69be
AL		 783 struct device *dev = &new_client->dev;
784 struct device *hwmon_dev;
4341fc3f 785 struct adm9240_data *data;
40b5cda2 786
715f69be 787 data = devm_kzalloc(dev, sizeof(*data), GFP_KERNEL);
4341fc3f
AL		 788 if (!data)
789 return -ENOMEM;
40b5cda2 790
4341fc3f 791 i2c_set_clientdata(new_client, data);
715f69be 792 data->client = new_client;
4341fc3f 793 mutex_init(&data->update_lock);
40b5cda2 794
4341fc3f 795 adm9240_init_client(new_client);
40b5cda2 796
715f69be
AL		 797 hwmon_dev = devm_hwmon_device_register_with_groups(dev,
798 new_client->name,
799 data,
800 adm9240_groups);
801 return PTR_ERR_OR_ZERO(hwmon_dev);
4341fc3f 802}
40b5cda2 803
4341fc3f
AL		 804static const struct i2c_device_id adm9240_id[] = {
805 { "adm9240", adm9240 },
806 { "ds1780", ds1780 },
807 { "lm81", lm81 },
808 { }
809};
810MODULE_DEVICE_TABLE(i2c, adm9240_id);
40b5cda2 811
4341fc3f
AL		 812static struct i2c_driver adm9240_driver = {
813 .class = I2C_CLASS_HWMON,
814 .driver = {
815 .name = "adm9240",
816 },
67487038 817 .probe_new = adm9240_probe,
4341fc3f
AL		 818 .id_table = adm9240_id,
819 .detect = adm9240_detect,
820 .address_list = normal_i2c,
821};
40b5cda2 822
f0967eea 823module_i2c_driver(adm9240_driver);
40b5cda2
GC		 824
825MODULE_AUTHOR("Michiel Rook <michiel@grendelproject.nl>, "
2ca7b961 826 "Grant Coady <gcoady.lk@gmail.com> and others");
40b5cda2
GC		 827MODULE_DESCRIPTION("ADM9240/DS1780/LM81 driver");
828MODULE_LICENSE("GPL");
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