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Grant Coady40b5cda2005-04-30 21:41:29 +10001/*
2 * adm9240.c Part of lm_sensors, Linux kernel modules for hardware
Guenter Roeckc387e4e2012-01-14 13:12:38 -08003 * monitoring
Grant Coady40b5cda2005-04-30 21:41:29 +10004 *
5 * Copyright (C) 1999 Frodo Looijaard <frodol@dds.nl>
6 * Philip Edelbrock <phil@netroedge.com>
7 * Copyright (C) 2003 Michiel Rook <michiel@grendelproject.nl>
Grant Coady2ca7b962006-10-08 21:57:41 +02008 * Copyright (C) 2005 Grant Coady <gcoady.lk@gmail.com> with valuable
Guenter Roeckc387e4e2012-01-14 13:12:38 -08009 * guidance from Jean Delvare
Grant Coady40b5cda2005-04-30 21:41:29 +100010 *
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 *
Jean Delvare0de2b242011-01-12 21:55:09 +010023 * Chassis Intrusion: clear CI latch with 'echo 0 > intrusion0_alarm'
Grant Coady40b5cda2005-04-30 21:41:29 +100024 *
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>
Grant Coadyc7461a62005-09-17 05:32:57 +100048#include <linux/hwmon-sysfs.h>
Mark M. Hoffman943b0832005-07-15 21:39:18 -040049#include <linux/hwmon.h>
Jean Delvare303760b2005-07-31 21:52:01 +020050#include <linux/hwmon-vid.h>
Mark M. Hoffman943b0832005-07-15 21:39:18 -040051#include <linux/err.h>
Ingo Molnar9a61bf62006-01-18 23:19:26 +010052#include <linux/mutex.h>
Jean Delvaredcd8f392012-10-10 15:25:56 +020053#include <linux/jiffies.h>
Grant Coady40b5cda2005-04-30 21:41:29 +100054
55/* Addresses to scan */
Mark M. Hoffman25e9c862008-02-17 22:28:03 -050056static const unsigned short normal_i2c[] = { 0x2c, 0x2d, 0x2e, 0x2f,
Grant Coady40b5cda2005-04-30 21:41:29 +100057 I2C_CLIENT_END };
58
Jean Delvaree5e9f442009-12-14 21:17:27 +010059enum chips { adm9240, ds1780, lm81 };
Grant Coady40b5cda2005-04-30 21:41:29 +100060
61/* ADM9240 registers */
62#define ADM9240_REG_MAN_ID 0x3e
63#define ADM9240_REG_DIE_REV 0x3f
64#define ADM9240_REG_CONFIG 0x40
65
66#define ADM9240_REG_IN(nr) (0x20 + (nr)) /* 0..5 */
67#define ADM9240_REG_IN_MAX(nr) (0x2b + (nr) * 2)
68#define ADM9240_REG_IN_MIN(nr) (0x2c + (nr) * 2)
69#define ADM9240_REG_FAN(nr) (0x28 + (nr)) /* 0..1 */
70#define ADM9240_REG_FAN_MIN(nr) (0x3b + (nr))
71#define ADM9240_REG_INT(nr) (0x41 + (nr))
72#define ADM9240_REG_INT_MASK(nr) (0x43 + (nr))
73#define ADM9240_REG_TEMP 0x27
Grant Coadyc7461a62005-09-17 05:32:57 +100074#define ADM9240_REG_TEMP_MAX(nr) (0x39 + (nr)) /* 0, 1 = high, hyst */
Grant Coady40b5cda2005-04-30 21:41:29 +100075#define ADM9240_REG_ANALOG_OUT 0x19
76#define ADM9240_REG_CHASSIS_CLEAR 0x46
77#define ADM9240_REG_VID_FAN_DIV 0x47
78#define ADM9240_REG_I2C_ADDR 0x48
79#define ADM9240_REG_VID4 0x49
80#define ADM9240_REG_TEMP_CONF 0x4b
81
82/* generalised scaling with integer rounding */
83static inline int SCALE(long val, int mul, int div)
84{
85 if (val < 0)
86 return (val * mul - div / 2) / div;
87 else
88 return (val * mul + div / 2) / div;
89}
90
91/* adm9240 internally scales voltage measurements */
92static const u16 nom_mv[] = { 2500, 2700, 3300, 5000, 12000, 2700 };
93
94static inline unsigned int IN_FROM_REG(u8 reg, int n)
95{
96 return SCALE(reg, nom_mv[n], 192);
97}
98
99static inline u8 IN_TO_REG(unsigned long val, int n)
100{
Guenter Roeck2a844c12013-01-09 08:09:34 -0800101 return clamp_val(SCALE(val, 192, nom_mv[n]), 0, 255);
Grant Coady40b5cda2005-04-30 21:41:29 +1000102}
103
104/* temperature range: -40..125, 127 disables temperature alarm */
105static inline s8 TEMP_TO_REG(long val)
106{
Guenter Roeck2a844c12013-01-09 08:09:34 -0800107 return clamp_val(SCALE(val, 1, 1000), -40, 127);
Grant Coady40b5cda2005-04-30 21:41:29 +1000108}
109
110/* two fans, each with low fan speed limit */
111static inline unsigned int FAN_FROM_REG(u8 reg, u8 div)
112{
113 if (!reg) /* error */
114 return -1;
115
116 if (reg == 255)
117 return 0;
118
119 return SCALE(1350000, 1, reg * div);
120}
121
122/* analog out 0..1250mV */
123static inline u8 AOUT_TO_REG(unsigned long val)
124{
Guenter Roeck2a844c12013-01-09 08:09:34 -0800125 return clamp_val(SCALE(val, 255, 1250), 0, 255);
Grant Coady40b5cda2005-04-30 21:41:29 +1000126}
127
128static inline unsigned int AOUT_FROM_REG(u8 reg)
129{
130 return SCALE(reg, 1250, 255);
131}
132
Grant Coady40b5cda2005-04-30 21:41:29 +1000133/* per client data */
134struct adm9240_data {
Axel Lin715f69b2014-07-03 22:01:48 +0800135 struct i2c_client *client;
Ingo Molnar9a61bf62006-01-18 23:19:26 +0100136 struct mutex update_lock;
Grant Coady40b5cda2005-04-30 21:41:29 +1000137 char valid;
138 unsigned long last_updated_measure;
139 unsigned long last_updated_config;
140
141 u8 in[6]; /* ro in0_input */
142 u8 in_max[6]; /* rw in0_max */
143 u8 in_min[6]; /* rw in0_min */
144 u8 fan[2]; /* ro fan1_input */
145 u8 fan_min[2]; /* rw fan1_min */
146 u8 fan_div[2]; /* rw fan1_div, read-only accessor */
147 s16 temp; /* ro temp1_input, 9-bit sign-extended */
Grant Coadyc7461a62005-09-17 05:32:57 +1000148 s8 temp_max[2]; /* rw 0 -> temp_max, 1 -> temp_max_hyst */
Grant Coady40b5cda2005-04-30 21:41:29 +1000149 u16 alarms; /* ro alarms */
Grant Coady8e8f9282005-05-13 20:26:10 +1000150 u8 aout; /* rw aout_output */
Grant Coady40b5cda2005-04-30 21:41:29 +1000151 u8 vid; /* ro vid */
152 u8 vrm; /* -- vrm set on startup, no accessor */
153};
154
Axel Lin4341fc32014-07-03 21:59:49 +0800155/* write new fan div, callers must hold data->update_lock */
156static void adm9240_write_fan_div(struct i2c_client *client, int nr,
157 u8 fan_div)
158{
159 u8 reg, old, shift = (nr + 2) * 2;
160
161 reg = i2c_smbus_read_byte_data(client, ADM9240_REG_VID_FAN_DIV);
162 old = (reg >> shift) & 3;
163 reg &= ~(3 << shift);
164 reg |= (fan_div << shift);
165 i2c_smbus_write_byte_data(client, ADM9240_REG_VID_FAN_DIV, reg);
166 dev_dbg(&client->dev,
167 "fan%d clock divider changed from %u to %u\n",
168 nr + 1, 1 << old, 1 << fan_div);
169}
170
171static struct adm9240_data *adm9240_update_device(struct device *dev)
172{
Axel Lin715f69b2014-07-03 22:01:48 +0800173 struct adm9240_data *data = dev_get_drvdata(dev);
174 struct i2c_client *client = data->client;
Axel Lin4341fc32014-07-03 21:59:49 +0800175 int i;
176
177 mutex_lock(&data->update_lock);
178
179 /* minimum measurement cycle: 1.75 seconds */
180 if (time_after(jiffies, data->last_updated_measure + (HZ * 7 / 4))
181 || !data->valid) {
182
183 for (i = 0; i < 6; i++) { /* read voltages */
184 data->in[i] = i2c_smbus_read_byte_data(client,
185 ADM9240_REG_IN(i));
186 }
187 data->alarms = i2c_smbus_read_byte_data(client,
188 ADM9240_REG_INT(0)) |
189 i2c_smbus_read_byte_data(client,
190 ADM9240_REG_INT(1)) << 8;
191
192 /*
193 * read temperature: assume temperature changes less than
194 * 0.5'C per two measurement cycles thus ignore possible
195 * but unlikely aliasing error on lsb reading. --Grant
196 */
197 data->temp = ((i2c_smbus_read_byte_data(client,
198 ADM9240_REG_TEMP) << 8) |
199 i2c_smbus_read_byte_data(client,
200 ADM9240_REG_TEMP_CONF)) / 128;
201
202 for (i = 0; i < 2; i++) { /* read fans */
203 data->fan[i] = i2c_smbus_read_byte_data(client,
204 ADM9240_REG_FAN(i));
205
206 /* adjust fan clock divider on overflow */
207 if (data->valid && data->fan[i] == 255 &&
208 data->fan_div[i] < 3) {
209
210 adm9240_write_fan_div(client, i,
211 ++data->fan_div[i]);
212
213 /* adjust fan_min if active, but not to 0 */
214 if (data->fan_min[i] < 255 &&
215 data->fan_min[i] >= 2)
216 data->fan_min[i] /= 2;
217 }
218 }
219 data->last_updated_measure = jiffies;
220 }
221
222 /* minimum config reading cycle: 300 seconds */
223 if (time_after(jiffies, data->last_updated_config + (HZ * 300))
224 || !data->valid) {
225
226 for (i = 0; i < 6; i++) {
227 data->in_min[i] = i2c_smbus_read_byte_data(client,
228 ADM9240_REG_IN_MIN(i));
229 data->in_max[i] = i2c_smbus_read_byte_data(client,
230 ADM9240_REG_IN_MAX(i));
231 }
232 for (i = 0; i < 2; i++) {
233 data->fan_min[i] = i2c_smbus_read_byte_data(client,
234 ADM9240_REG_FAN_MIN(i));
235 }
236 data->temp_max[0] = i2c_smbus_read_byte_data(client,
237 ADM9240_REG_TEMP_MAX(0));
238 data->temp_max[1] = i2c_smbus_read_byte_data(client,
239 ADM9240_REG_TEMP_MAX(1));
240
241 /* read fan divs and 5-bit VID */
242 i = i2c_smbus_read_byte_data(client, ADM9240_REG_VID_FAN_DIV);
243 data->fan_div[0] = (i >> 4) & 3;
244 data->fan_div[1] = (i >> 6) & 3;
245 data->vid = i & 0x0f;
246 data->vid |= (i2c_smbus_read_byte_data(client,
247 ADM9240_REG_VID4) & 1) << 4;
248 /* read analog out */
249 data->aout = i2c_smbus_read_byte_data(client,
250 ADM9240_REG_ANALOG_OUT);
251
252 data->last_updated_config = jiffies;
253 data->valid = 1;
254 }
255 mutex_unlock(&data->update_lock);
256 return data;
257}
258
Grant Coady40b5cda2005-04-30 21:41:29 +1000259/*** sysfs accessors ***/
260
261/* temperature */
Grant Coadyc7461a62005-09-17 05:32:57 +1000262static ssize_t show_temp(struct device *dev, struct device_attribute *dummy,
263 char *buf)
264{
265 struct adm9240_data *data = adm9240_update_device(dev);
266 return sprintf(buf, "%d\n", data->temp * 500); /* 9-bit value */
Grant Coady40b5cda2005-04-30 21:41:29 +1000267}
268
Grant Coadyc7461a62005-09-17 05:32:57 +1000269static ssize_t show_max(struct device *dev, struct device_attribute *devattr,
270 char *buf)
271{
272 struct sensor_device_attribute *attr = to_sensor_dev_attr(devattr);
273 struct adm9240_data *data = adm9240_update_device(dev);
274 return sprintf(buf, "%d\n", data->temp_max[attr->index] * 1000);
275}
Grant Coady40b5cda2005-04-30 21:41:29 +1000276
Grant Coadyc7461a62005-09-17 05:32:57 +1000277static ssize_t set_max(struct device *dev, struct device_attribute *devattr,
278 const char *buf, size_t count)
279{
280 struct sensor_device_attribute *attr = to_sensor_dev_attr(devattr);
Axel Lin715f69b2014-07-03 22:01:48 +0800281 struct adm9240_data *data = dev_get_drvdata(dev);
282 struct i2c_client *client = data->client;
Guenter Roeckc387e4e2012-01-14 13:12:38 -0800283 long val;
284 int err;
285
286 err = kstrtol(buf, 10, &val);
287 if (err)
288 return err;
Grant Coadyc7461a62005-09-17 05:32:57 +1000289
Ingo Molnar9a61bf62006-01-18 23:19:26 +0100290 mutex_lock(&data->update_lock);
Grant Coadyc7461a62005-09-17 05:32:57 +1000291 data->temp_max[attr->index] = TEMP_TO_REG(val);
292 i2c_smbus_write_byte_data(client, ADM9240_REG_TEMP_MAX(attr->index),
293 data->temp_max[attr->index]);
Ingo Molnar9a61bf62006-01-18 23:19:26 +0100294 mutex_unlock(&data->update_lock);
Grant Coadyc7461a62005-09-17 05:32:57 +1000295 return count;
296}
297
Grant Coady40b5cda2005-04-30 21:41:29 +1000298static DEVICE_ATTR(temp1_input, S_IRUGO, show_temp, NULL);
Grant Coadyc7461a62005-09-17 05:32:57 +1000299static SENSOR_DEVICE_ATTR(temp1_max, S_IWUSR | S_IRUGO,
300 show_max, set_max, 0);
301static SENSOR_DEVICE_ATTR(temp1_max_hyst, S_IWUSR | S_IRUGO,
302 show_max, set_max, 1);
Grant Coady40b5cda2005-04-30 21:41:29 +1000303
304/* voltage */
Grant Coadyc7461a62005-09-17 05:32:57 +1000305static ssize_t show_in(struct device *dev, struct device_attribute *devattr,
306 char *buf)
Grant Coady40b5cda2005-04-30 21:41:29 +1000307{
Grant Coadyc7461a62005-09-17 05:32:57 +1000308 struct sensor_device_attribute *attr = to_sensor_dev_attr(devattr);
Grant Coady40b5cda2005-04-30 21:41:29 +1000309 struct adm9240_data *data = adm9240_update_device(dev);
Grant Coadyc7461a62005-09-17 05:32:57 +1000310 return sprintf(buf, "%d\n", IN_FROM_REG(data->in[attr->index],
311 attr->index));
Grant Coady40b5cda2005-04-30 21:41:29 +1000312}
313
Jean Delvaree415e482005-09-25 16:14:18 +0200314static ssize_t show_in_min(struct device *dev,
315 struct device_attribute *devattr, char *buf)
Grant Coady40b5cda2005-04-30 21:41:29 +1000316{
Grant Coadyc7461a62005-09-17 05:32:57 +1000317 struct sensor_device_attribute *attr = to_sensor_dev_attr(devattr);
Grant Coady40b5cda2005-04-30 21:41:29 +1000318 struct adm9240_data *data = adm9240_update_device(dev);
Grant Coadyc7461a62005-09-17 05:32:57 +1000319 return sprintf(buf, "%d\n", IN_FROM_REG(data->in_min[attr->index],
320 attr->index));
Grant Coady40b5cda2005-04-30 21:41:29 +1000321}
322
Jean Delvaree415e482005-09-25 16:14:18 +0200323static ssize_t show_in_max(struct device *dev,
324 struct device_attribute *devattr, char *buf)
Grant Coady40b5cda2005-04-30 21:41:29 +1000325{
Grant Coadyc7461a62005-09-17 05:32:57 +1000326 struct sensor_device_attribute *attr = to_sensor_dev_attr(devattr);
Grant Coady40b5cda2005-04-30 21:41:29 +1000327 struct adm9240_data *data = adm9240_update_device(dev);
Grant Coadyc7461a62005-09-17 05:32:57 +1000328 return sprintf(buf, "%d\n", IN_FROM_REG(data->in_max[attr->index],
329 attr->index));
Grant Coady40b5cda2005-04-30 21:41:29 +1000330}
331
Jean Delvaree415e482005-09-25 16:14:18 +0200332static ssize_t set_in_min(struct device *dev,
333 struct device_attribute *devattr,
Grant Coadyc7461a62005-09-17 05:32:57 +1000334 const char *buf, size_t count)
Grant Coady40b5cda2005-04-30 21:41:29 +1000335{
Grant Coadyc7461a62005-09-17 05:32:57 +1000336 struct sensor_device_attribute *attr = to_sensor_dev_attr(devattr);
Axel Lin715f69b2014-07-03 22:01:48 +0800337 struct adm9240_data *data = dev_get_drvdata(dev);
338 struct i2c_client *client = data->client;
Guenter Roeckc387e4e2012-01-14 13:12:38 -0800339 unsigned long val;
340 int err;
341
342 err = kstrtoul(buf, 10, &val);
343 if (err)
344 return err;
Grant Coady40b5cda2005-04-30 21:41:29 +1000345
Ingo Molnar9a61bf62006-01-18 23:19:26 +0100346 mutex_lock(&data->update_lock);
Grant Coadyc7461a62005-09-17 05:32:57 +1000347 data->in_min[attr->index] = IN_TO_REG(val, attr->index);
348 i2c_smbus_write_byte_data(client, ADM9240_REG_IN_MIN(attr->index),
349 data->in_min[attr->index]);
Ingo Molnar9a61bf62006-01-18 23:19:26 +0100350 mutex_unlock(&data->update_lock);
Grant Coady40b5cda2005-04-30 21:41:29 +1000351 return count;
352}
353
Jean Delvaree415e482005-09-25 16:14:18 +0200354static ssize_t set_in_max(struct device *dev,
355 struct device_attribute *devattr,
Grant Coadyc7461a62005-09-17 05:32:57 +1000356 const char *buf, size_t count)
Grant Coady40b5cda2005-04-30 21:41:29 +1000357{
Grant Coadyc7461a62005-09-17 05:32:57 +1000358 struct sensor_device_attribute *attr = to_sensor_dev_attr(devattr);
Axel Lin715f69b2014-07-03 22:01:48 +0800359 struct adm9240_data *data = dev_get_drvdata(dev);
360 struct i2c_client *client = data->client;
Guenter Roeckc387e4e2012-01-14 13:12:38 -0800361 unsigned long val;
362 int err;
363
364 err = kstrtoul(buf, 10, &val);
365 if (err)
366 return err;
Grant Coady40b5cda2005-04-30 21:41:29 +1000367
Ingo Molnar9a61bf62006-01-18 23:19:26 +0100368 mutex_lock(&data->update_lock);
Grant Coadyc7461a62005-09-17 05:32:57 +1000369 data->in_max[attr->index] = IN_TO_REG(val, attr->index);
370 i2c_smbus_write_byte_data(client, ADM9240_REG_IN_MAX(attr->index),
371 data->in_max[attr->index]);
Ingo Molnar9a61bf62006-01-18 23:19:26 +0100372 mutex_unlock(&data->update_lock);
Grant Coady40b5cda2005-04-30 21:41:29 +1000373 return count;
374}
375
Grant Coadyc7461a62005-09-17 05:32:57 +1000376#define vin(nr) \
Guenter Roeckc387e4e2012-01-14 13:12:38 -0800377static SENSOR_DEVICE_ATTR(in##nr##_input, S_IRUGO, \
Grant Coadyc7461a62005-09-17 05:32:57 +1000378 show_in, NULL, nr); \
379static SENSOR_DEVICE_ATTR(in##nr##_min, S_IRUGO | S_IWUSR, \
380 show_in_min, set_in_min, nr); \
381static SENSOR_DEVICE_ATTR(in##nr##_max, S_IRUGO | S_IWUSR, \
382 show_in_max, set_in_max, nr);
Grant Coady40b5cda2005-04-30 21:41:29 +1000383
Grant Coadyc7461a62005-09-17 05:32:57 +1000384vin(0);
385vin(1);
386vin(2);
387vin(3);
388vin(4);
389vin(5);
Grant Coady40b5cda2005-04-30 21:41:29 +1000390
391/* fans */
Grant Coadyc7461a62005-09-17 05:32:57 +1000392static ssize_t show_fan(struct device *dev,
393 struct device_attribute *devattr, char *buf)
Grant Coady40b5cda2005-04-30 21:41:29 +1000394{
Grant Coadyc7461a62005-09-17 05:32:57 +1000395 struct sensor_device_attribute *attr = to_sensor_dev_attr(devattr);
Grant Coady40b5cda2005-04-30 21:41:29 +1000396 struct adm9240_data *data = adm9240_update_device(dev);
Grant Coadyc7461a62005-09-17 05:32:57 +1000397 return sprintf(buf, "%d\n", FAN_FROM_REG(data->fan[attr->index],
398 1 << data->fan_div[attr->index]));
Grant Coady40b5cda2005-04-30 21:41:29 +1000399}
400
Grant Coadyc7461a62005-09-17 05:32:57 +1000401static ssize_t show_fan_min(struct device *dev,
402 struct device_attribute *devattr, char *buf)
Grant Coady40b5cda2005-04-30 21:41:29 +1000403{
Grant Coadyc7461a62005-09-17 05:32:57 +1000404 struct sensor_device_attribute *attr = to_sensor_dev_attr(devattr);
Grant Coady40b5cda2005-04-30 21:41:29 +1000405 struct adm9240_data *data = adm9240_update_device(dev);
Grant Coadyc7461a62005-09-17 05:32:57 +1000406 return sprintf(buf, "%d\n", FAN_FROM_REG(data->fan_min[attr->index],
407 1 << data->fan_div[attr->index]));
Grant Coady40b5cda2005-04-30 21:41:29 +1000408}
409
Grant Coadyc7461a62005-09-17 05:32:57 +1000410static ssize_t show_fan_div(struct device *dev,
411 struct device_attribute *devattr, char *buf)
Grant Coady40b5cda2005-04-30 21:41:29 +1000412{
Grant Coadyc7461a62005-09-17 05:32:57 +1000413 struct sensor_device_attribute *attr = to_sensor_dev_attr(devattr);
Grant Coady40b5cda2005-04-30 21:41:29 +1000414 struct adm9240_data *data = adm9240_update_device(dev);
Grant Coadyc7461a62005-09-17 05:32:57 +1000415 return sprintf(buf, "%d\n", 1 << data->fan_div[attr->index]);
Grant Coady40b5cda2005-04-30 21:41:29 +1000416}
417
Jean Delvaree415e482005-09-25 16:14:18 +0200418/*
Grant Coady40b5cda2005-04-30 21:41:29 +1000419 * set fan speed low limit:
420 *
421 * - value is zero: disable fan speed low limit alarm
422 *
423 * - value is below fan speed measurement range: enable fan speed low
424 * limit alarm to be asserted while fan speed too slow to measure
425 *
426 * - otherwise: select fan clock divider to suit fan speed low limit,
427 * measurement code may adjust registers to ensure fan speed reading
428 */
Grant Coadyc7461a62005-09-17 05:32:57 +1000429static ssize_t set_fan_min(struct device *dev,
430 struct device_attribute *devattr,
431 const char *buf, size_t count)
Grant Coady40b5cda2005-04-30 21:41:29 +1000432{
Grant Coadyc7461a62005-09-17 05:32:57 +1000433 struct sensor_device_attribute *attr = to_sensor_dev_attr(devattr);
Axel Lin715f69b2014-07-03 22:01:48 +0800434 struct adm9240_data *data = dev_get_drvdata(dev);
435 struct i2c_client *client = data->client;
Grant Coadyc7461a62005-09-17 05:32:57 +1000436 int nr = attr->index;
Grant Coady40b5cda2005-04-30 21:41:29 +1000437 u8 new_div;
Guenter Roeckc387e4e2012-01-14 13:12:38 -0800438 unsigned long val;
439 int err;
440
441 err = kstrtoul(buf, 10, &val);
442 if (err)
443 return err;
Grant Coady40b5cda2005-04-30 21:41:29 +1000444
Ingo Molnar9a61bf62006-01-18 23:19:26 +0100445 mutex_lock(&data->update_lock);
Grant Coady40b5cda2005-04-30 21:41:29 +1000446
447 if (!val) {
448 data->fan_min[nr] = 255;
449 new_div = data->fan_div[nr];
450
451 dev_dbg(&client->dev, "fan%u low limit set disabled\n",
452 nr + 1);
453
454 } else if (val < 1350000 / (8 * 254)) {
455 new_div = 3;
456 data->fan_min[nr] = 254;
457
458 dev_dbg(&client->dev, "fan%u low limit set minimum %u\n",
459 nr + 1, FAN_FROM_REG(254, 1 << new_div));
460
461 } else {
462 unsigned int new_min = 1350000 / val;
463
464 new_div = 0;
465 while (new_min > 192 && new_div < 3) {
466 new_div++;
467 new_min /= 2;
468 }
469 if (!new_min) /* keep > 0 */
470 new_min++;
471
472 data->fan_min[nr] = new_min;
473
474 dev_dbg(&client->dev, "fan%u low limit set fan speed %u\n",
475 nr + 1, FAN_FROM_REG(new_min, 1 << new_div));
476 }
477
478 if (new_div != data->fan_div[nr]) {
479 data->fan_div[nr] = new_div;
480 adm9240_write_fan_div(client, nr, new_div);
481 }
Grant Coady205cf132005-09-17 05:32:55 +1000482 i2c_smbus_write_byte_data(client, ADM9240_REG_FAN_MIN(nr),
Grant Coady40b5cda2005-04-30 21:41:29 +1000483 data->fan_min[nr]);
484
Ingo Molnar9a61bf62006-01-18 23:19:26 +0100485 mutex_unlock(&data->update_lock);
Grant Coady40b5cda2005-04-30 21:41:29 +1000486 return count;
487}
488
Grant Coadyc7461a62005-09-17 05:32:57 +1000489#define fan(nr) \
490static SENSOR_DEVICE_ATTR(fan##nr##_input, S_IRUGO, \
491 show_fan, NULL, nr - 1); \
492static SENSOR_DEVICE_ATTR(fan##nr##_div, S_IRUGO, \
493 show_fan_div, NULL, nr - 1); \
494static SENSOR_DEVICE_ATTR(fan##nr##_min, S_IRUGO | S_IWUSR, \
495 show_fan_min, set_fan_min, nr - 1);
Grant Coady40b5cda2005-04-30 21:41:29 +1000496
Grant Coadyc7461a62005-09-17 05:32:57 +1000497fan(1);
498fan(2);
Grant Coady40b5cda2005-04-30 21:41:29 +1000499
500/* alarms */
Jean Delvaree415e482005-09-25 16:14:18 +0200501static ssize_t show_alarms(struct device *dev,
502 struct device_attribute *attr, char *buf)
Grant Coady40b5cda2005-04-30 21:41:29 +1000503{
504 struct adm9240_data *data = adm9240_update_device(dev);
505 return sprintf(buf, "%u\n", data->alarms);
506}
507static DEVICE_ATTR(alarms, S_IRUGO, show_alarms, NULL);
508
Jean Delvare360f9452008-01-06 15:49:19 +0100509static ssize_t show_alarm(struct device *dev,
510 struct device_attribute *attr, char *buf)
511{
512 int bitnr = to_sensor_dev_attr(attr)->index;
513 struct adm9240_data *data = adm9240_update_device(dev);
514 return sprintf(buf, "%u\n", (data->alarms >> bitnr) & 1);
515}
516static SENSOR_DEVICE_ATTR(in0_alarm, S_IRUGO, show_alarm, NULL, 0);
517static SENSOR_DEVICE_ATTR(in1_alarm, S_IRUGO, show_alarm, NULL, 1);
518static SENSOR_DEVICE_ATTR(in2_alarm, S_IRUGO, show_alarm, NULL, 2);
519static SENSOR_DEVICE_ATTR(in3_alarm, S_IRUGO, show_alarm, NULL, 3);
520static SENSOR_DEVICE_ATTR(in4_alarm, S_IRUGO, show_alarm, NULL, 8);
521static SENSOR_DEVICE_ATTR(in5_alarm, S_IRUGO, show_alarm, NULL, 9);
522static SENSOR_DEVICE_ATTR(temp1_alarm, S_IRUGO, show_alarm, NULL, 4);
523static SENSOR_DEVICE_ATTR(fan1_alarm, S_IRUGO, show_alarm, NULL, 6);
524static SENSOR_DEVICE_ATTR(fan2_alarm, S_IRUGO, show_alarm, NULL, 7);
525
Grant Coady40b5cda2005-04-30 21:41:29 +1000526/* vid */
Jean Delvaree415e482005-09-25 16:14:18 +0200527static ssize_t show_vid(struct device *dev,
528 struct device_attribute *attr, char *buf)
Grant Coady40b5cda2005-04-30 21:41:29 +1000529{
530 struct adm9240_data *data = adm9240_update_device(dev);
531 return sprintf(buf, "%d\n", vid_from_reg(data->vid, data->vrm));
532}
533static DEVICE_ATTR(cpu0_vid, S_IRUGO, show_vid, NULL);
534
535/* analog output */
Jean Delvaree415e482005-09-25 16:14:18 +0200536static ssize_t show_aout(struct device *dev,
537 struct device_attribute *attr, char *buf)
Grant Coady40b5cda2005-04-30 21:41:29 +1000538{
539 struct adm9240_data *data = adm9240_update_device(dev);
540 return sprintf(buf, "%d\n", AOUT_FROM_REG(data->aout));
541}
542
Jean Delvaree415e482005-09-25 16:14:18 +0200543static ssize_t set_aout(struct device *dev,
544 struct device_attribute *attr,
545 const char *buf, size_t count)
Grant Coady40b5cda2005-04-30 21:41:29 +1000546{
Axel Lin715f69b2014-07-03 22:01:48 +0800547 struct adm9240_data *data = dev_get_drvdata(dev);
548 struct i2c_client *client = data->client;
Guenter Roeckc387e4e2012-01-14 13:12:38 -0800549 long val;
550 int err;
551
552 err = kstrtol(buf, 10, &val);
553 if (err)
554 return err;
Grant Coady40b5cda2005-04-30 21:41:29 +1000555
Ingo Molnar9a61bf62006-01-18 23:19:26 +0100556 mutex_lock(&data->update_lock);
Grant Coady40b5cda2005-04-30 21:41:29 +1000557 data->aout = AOUT_TO_REG(val);
Grant Coady205cf132005-09-17 05:32:55 +1000558 i2c_smbus_write_byte_data(client, ADM9240_REG_ANALOG_OUT, data->aout);
Ingo Molnar9a61bf62006-01-18 23:19:26 +0100559 mutex_unlock(&data->update_lock);
Grant Coady40b5cda2005-04-30 21:41:29 +1000560 return count;
561}
562static DEVICE_ATTR(aout_output, S_IRUGO | S_IWUSR, show_aout, set_aout);
563
Jean Delvare0de2b242011-01-12 21:55:09 +0100564static ssize_t chassis_clear(struct device *dev,
565 struct device_attribute *attr,
566 const char *buf, size_t count)
567{
Axel Lin715f69b2014-07-03 22:01:48 +0800568 struct adm9240_data *data = dev_get_drvdata(dev);
569 struct i2c_client *client = data->client;
Jean Delvare0de2b242011-01-12 21:55:09 +0100570 unsigned long val;
571
Frans Meulenbroeks179c4fd2012-01-04 20:58:52 +0100572 if (kstrtoul(buf, 10, &val) || val != 0)
Jean Delvare0de2b242011-01-12 21:55:09 +0100573 return -EINVAL;
574
575 mutex_lock(&data->update_lock);
576 i2c_smbus_write_byte_data(client, ADM9240_REG_CHASSIS_CLEAR, 0x80);
577 data->valid = 0; /* Force cache refresh */
578 mutex_unlock(&data->update_lock);
579 dev_dbg(&client->dev, "chassis intrusion latch cleared\n");
580
581 return count;
582}
583static SENSOR_DEVICE_ATTR(intrusion0_alarm, S_IRUGO | S_IWUSR, show_alarm,
584 chassis_clear, 12);
Grant Coady40b5cda2005-04-30 21:41:29 +1000585
Axel Lin715f69b2014-07-03 22:01:48 +0800586static struct attribute *adm9240_attrs[] = {
Mark M. Hoffman681c6f72006-09-24 21:15:35 +0200587 &sensor_dev_attr_in0_input.dev_attr.attr,
588 &sensor_dev_attr_in0_min.dev_attr.attr,
589 &sensor_dev_attr_in0_max.dev_attr.attr,
Jean Delvare360f9452008-01-06 15:49:19 +0100590 &sensor_dev_attr_in0_alarm.dev_attr.attr,
Mark M. Hoffman681c6f72006-09-24 21:15:35 +0200591 &sensor_dev_attr_in1_input.dev_attr.attr,
592 &sensor_dev_attr_in1_min.dev_attr.attr,
593 &sensor_dev_attr_in1_max.dev_attr.attr,
Jean Delvare360f9452008-01-06 15:49:19 +0100594 &sensor_dev_attr_in1_alarm.dev_attr.attr,
Mark M. Hoffman681c6f72006-09-24 21:15:35 +0200595 &sensor_dev_attr_in2_input.dev_attr.attr,
596 &sensor_dev_attr_in2_min.dev_attr.attr,
597 &sensor_dev_attr_in2_max.dev_attr.attr,
Jean Delvare360f9452008-01-06 15:49:19 +0100598 &sensor_dev_attr_in2_alarm.dev_attr.attr,
Mark M. Hoffman681c6f72006-09-24 21:15:35 +0200599 &sensor_dev_attr_in3_input.dev_attr.attr,
600 &sensor_dev_attr_in3_min.dev_attr.attr,
601 &sensor_dev_attr_in3_max.dev_attr.attr,
Jean Delvare360f9452008-01-06 15:49:19 +0100602 &sensor_dev_attr_in3_alarm.dev_attr.attr,
Mark M. Hoffman681c6f72006-09-24 21:15:35 +0200603 &sensor_dev_attr_in4_input.dev_attr.attr,
604 &sensor_dev_attr_in4_min.dev_attr.attr,
605 &sensor_dev_attr_in4_max.dev_attr.attr,
Jean Delvare360f9452008-01-06 15:49:19 +0100606 &sensor_dev_attr_in4_alarm.dev_attr.attr,
Mark M. Hoffman681c6f72006-09-24 21:15:35 +0200607 &sensor_dev_attr_in5_input.dev_attr.attr,
608 &sensor_dev_attr_in5_min.dev_attr.attr,
609 &sensor_dev_attr_in5_max.dev_attr.attr,
Jean Delvare360f9452008-01-06 15:49:19 +0100610 &sensor_dev_attr_in5_alarm.dev_attr.attr,
Mark M. Hoffman681c6f72006-09-24 21:15:35 +0200611 &dev_attr_temp1_input.attr,
612 &sensor_dev_attr_temp1_max.dev_attr.attr,
613 &sensor_dev_attr_temp1_max_hyst.dev_attr.attr,
Jean Delvare360f9452008-01-06 15:49:19 +0100614 &sensor_dev_attr_temp1_alarm.dev_attr.attr,
Mark M. Hoffman681c6f72006-09-24 21:15:35 +0200615 &sensor_dev_attr_fan1_input.dev_attr.attr,
616 &sensor_dev_attr_fan1_div.dev_attr.attr,
617 &sensor_dev_attr_fan1_min.dev_attr.attr,
Jean Delvare360f9452008-01-06 15:49:19 +0100618 &sensor_dev_attr_fan1_alarm.dev_attr.attr,
Mark M. Hoffman681c6f72006-09-24 21:15:35 +0200619 &sensor_dev_attr_fan2_input.dev_attr.attr,
620 &sensor_dev_attr_fan2_div.dev_attr.attr,
621 &sensor_dev_attr_fan2_min.dev_attr.attr,
Jean Delvare360f9452008-01-06 15:49:19 +0100622 &sensor_dev_attr_fan2_alarm.dev_attr.attr,
Mark M. Hoffman681c6f72006-09-24 21:15:35 +0200623 &dev_attr_alarms.attr,
624 &dev_attr_aout_output.attr,
Jean Delvare0de2b242011-01-12 21:55:09 +0100625 &sensor_dev_attr_intrusion0_alarm.dev_attr.attr,
Mark M. Hoffman681c6f72006-09-24 21:15:35 +0200626 &dev_attr_cpu0_vid.attr,
627 NULL
628};
629
Axel Lin715f69b2014-07-03 22:01:48 +0800630ATTRIBUTE_GROUPS(adm9240);
Mark M. Hoffman681c6f72006-09-24 21:15:35 +0200631
Grant Coady40b5cda2005-04-30 21:41:29 +1000632
633/*** sensor chip detect and driver install ***/
634
Jean Delvare7fae8282008-07-16 19:30:09 +0200635/* Return 0 if detection is successful, -ENODEV otherwise */
Jean Delvare310ec792009-12-14 21:17:23 +0100636static int adm9240_detect(struct i2c_client *new_client,
Jean Delvare7fae8282008-07-16 19:30:09 +0200637 struct i2c_board_info *info)
Grant Coady40b5cda2005-04-30 21:41:29 +1000638{
Jean Delvare7fae8282008-07-16 19:30:09 +0200639 struct i2c_adapter *adapter = new_client->adapter;
Grant Coady40b5cda2005-04-30 21:41:29 +1000640 const char *name = "";
Jean Delvare7fae8282008-07-16 19:30:09 +0200641 int address = new_client->addr;
Grant Coady40b5cda2005-04-30 21:41:29 +1000642 u8 man_id, die_rev;
643
644 if (!i2c_check_functionality(adapter, I2C_FUNC_SMBUS_BYTE_DATA))
Jean Delvare7fae8282008-07-16 19:30:09 +0200645 return -ENODEV;
Grant Coady40b5cda2005-04-30 21:41:29 +1000646
Jean Delvare52df6442009-12-09 20:35:57 +0100647 /* verify chip: reg address should match i2c address */
648 if (i2c_smbus_read_byte_data(new_client, ADM9240_REG_I2C_ADDR)
649 != address) {
650 dev_err(&adapter->dev, "detect fail: address match, 0x%02x\n",
651 address);
652 return -ENODEV;
Grant Coady40b5cda2005-04-30 21:41:29 +1000653 }
654
Jean Delvare52df6442009-12-09 20:35:57 +0100655 /* check known chip manufacturer */
656 man_id = i2c_smbus_read_byte_data(new_client, ADM9240_REG_MAN_ID);
657 if (man_id == 0x23) {
Grant Coady40b5cda2005-04-30 21:41:29 +1000658 name = "adm9240";
Jean Delvare52df6442009-12-09 20:35:57 +0100659 } else if (man_id == 0xda) {
Grant Coady40b5cda2005-04-30 21:41:29 +1000660 name = "ds1780";
Jean Delvare52df6442009-12-09 20:35:57 +0100661 } else if (man_id == 0x01) {
Grant Coady40b5cda2005-04-30 21:41:29 +1000662 name = "lm81";
Jean Delvare52df6442009-12-09 20:35:57 +0100663 } else {
664 dev_err(&adapter->dev, "detect fail: unknown manuf, 0x%02x\n",
665 man_id);
666 return -ENODEV;
Grant Coady40b5cda2005-04-30 21:41:29 +1000667 }
Jean Delvare52df6442009-12-09 20:35:57 +0100668
669 /* successful detect, print chip info */
670 die_rev = i2c_smbus_read_byte_data(new_client, ADM9240_REG_DIE_REV);
671 dev_info(&adapter->dev, "found %s revision %u\n",
672 man_id == 0x23 ? "ADM9240" :
673 man_id == 0xda ? "DS1780" : "LM81", die_rev);
674
Jean Delvare7fae8282008-07-16 19:30:09 +0200675 strlcpy(info->type, name, I2C_NAME_SIZE);
Grant Coady40b5cda2005-04-30 21:41:29 +1000676
Jean Delvare7fae8282008-07-16 19:30:09 +0200677 return 0;
678}
679
Axel Lin4341fc32014-07-03 21:59:49 +0800680static void adm9240_init_client(struct i2c_client *client)
681{
682 struct adm9240_data *data = i2c_get_clientdata(client);
683 u8 conf = i2c_smbus_read_byte_data(client, ADM9240_REG_CONFIG);
684 u8 mode = i2c_smbus_read_byte_data(client, ADM9240_REG_TEMP_CONF) & 3;
685
686 data->vrm = vid_which_vrm(); /* need this to report vid as mV */
687
688 dev_info(&client->dev, "Using VRM: %d.%d\n", data->vrm / 10,
689 data->vrm % 10);
690
691 if (conf & 1) { /* measurement cycle running: report state */
692
693 dev_info(&client->dev, "status: config 0x%02x mode %u\n",
694 conf, mode);
695
696 } else { /* cold start: open limits before starting chip */
697 int i;
698
699 for (i = 0; i < 6; i++) {
700 i2c_smbus_write_byte_data(client,
701 ADM9240_REG_IN_MIN(i), 0);
702 i2c_smbus_write_byte_data(client,
703 ADM9240_REG_IN_MAX(i), 255);
704 }
705 i2c_smbus_write_byte_data(client,
706 ADM9240_REG_FAN_MIN(0), 255);
707 i2c_smbus_write_byte_data(client,
708 ADM9240_REG_FAN_MIN(1), 255);
709 i2c_smbus_write_byte_data(client,
710 ADM9240_REG_TEMP_MAX(0), 127);
711 i2c_smbus_write_byte_data(client,
712 ADM9240_REG_TEMP_MAX(1), 127);
713
714 /* start measurement cycle */
715 i2c_smbus_write_byte_data(client, ADM9240_REG_CONFIG, 1);
716
717 dev_info(&client->dev,
718 "cold start: config was 0x%02x mode %u\n", conf, mode);
719 }
720}
721
Jean Delvare7fae8282008-07-16 19:30:09 +0200722static int adm9240_probe(struct i2c_client *new_client,
723 const struct i2c_device_id *id)
724{
Axel Lin715f69b2014-07-03 22:01:48 +0800725 struct device *dev = &new_client->dev;
726 struct device *hwmon_dev;
Jean Delvare7fae8282008-07-16 19:30:09 +0200727 struct adm9240_data *data;
Jean Delvare7fae8282008-07-16 19:30:09 +0200728
Axel Lin715f69b2014-07-03 22:01:48 +0800729 data = devm_kzalloc(dev, sizeof(*data), GFP_KERNEL);
Guenter Roecke5ebb772012-06-02 09:58:00 -0700730 if (!data)
731 return -ENOMEM;
Jean Delvare7fae8282008-07-16 19:30:09 +0200732
733 i2c_set_clientdata(new_client, data);
Axel Lin715f69b2014-07-03 22:01:48 +0800734 data->client = new_client;
Ingo Molnar9a61bf62006-01-18 23:19:26 +0100735 mutex_init(&data->update_lock);
Grant Coady40b5cda2005-04-30 21:41:29 +1000736
Grant Coady40b5cda2005-04-30 21:41:29 +1000737 adm9240_init_client(new_client);
738
Axel Lin715f69b2014-07-03 22:01:48 +0800739 hwmon_dev = devm_hwmon_device_register_with_groups(dev,
740 new_client->name,
741 data,
742 adm9240_groups);
743 return PTR_ERR_OR_ZERO(hwmon_dev);
Grant Coady40b5cda2005-04-30 21:41:29 +1000744}
745
Axel Lin4341fc32014-07-03 21:59:49 +0800746static const struct i2c_device_id adm9240_id[] = {
747 { "adm9240", adm9240 },
748 { "ds1780", ds1780 },
749 { "lm81", lm81 },
750 { }
751};
752MODULE_DEVICE_TABLE(i2c, adm9240_id);
Grant Coady40b5cda2005-04-30 21:41:29 +1000753
Axel Lin4341fc32014-07-03 21:59:49 +0800754static struct i2c_driver adm9240_driver = {
755 .class = I2C_CLASS_HWMON,
756 .driver = {
757 .name = "adm9240",
758 },
759 .probe = adm9240_probe,
Axel Lin4341fc32014-07-03 21:59:49 +0800760 .id_table = adm9240_id,
761 .detect = adm9240_detect,
762 .address_list = normal_i2c,
763};
Grant Coady40b5cda2005-04-30 21:41:29 +1000764
Axel Linf0967ee2012-01-20 15:38:18 +0800765module_i2c_driver(adm9240_driver);
Grant Coady40b5cda2005-04-30 21:41:29 +1000766
767MODULE_AUTHOR("Michiel Rook <michiel@grendelproject.nl>, "
Grant Coady2ca7b962006-10-08 21:57:41 +0200768 "Grant Coady <gcoady.lk@gmail.com> and others");
Grant Coady40b5cda2005-04-30 21:41:29 +1000769MODULE_DESCRIPTION("ADM9240/DS1780/LM81 driver");
770MODULE_LICENSE("GPL");