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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> |
dcd8f392 | 53 | #include <linux/jiffies.h> |
40b5cda2 GC |
54 | |
55 | /* Addresses to scan */ | |
25e9c86d | 56 | static const unsigned short normal_i2c[] = { 0x2c, 0x2d, 0x2e, 0x2f, |
40b5cda2 GC |
57 | I2C_CLIENT_END }; |
58 | ||
e5e9f44c | 59 | enum chips { adm9240, ds1780, lm81 }; |
40b5cda2 GC |
60 | |
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 | |
c7461a66 | 74 | #define ADM9240_REG_TEMP_MAX(nr) (0x39 + (nr)) /* 0, 1 = high, hyst */ |
40b5cda2 GC |
75 | #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 */ | |
83 | static 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 */ | |
92 | static const u16 nom_mv[] = { 2500, 2700, 3300, 5000, 12000, 2700 }; | |
93 | ||
94 | static inline unsigned int IN_FROM_REG(u8 reg, int n) | |
95 | { | |
96 | return SCALE(reg, nom_mv[n], 192); | |
97 | } | |
98 | ||
99 | static inline u8 IN_TO_REG(unsigned long val, int n) | |
100 | { | |
2a844c14 | 101 | return clamp_val(SCALE(val, 192, nom_mv[n]), 0, 255); |
40b5cda2 GC |
102 | } |
103 | ||
104 | /* temperature range: -40..125, 127 disables temperature alarm */ | |
105 | static inline s8 TEMP_TO_REG(long val) | |
106 | { | |
2a844c14 | 107 | return clamp_val(SCALE(val, 1, 1000), -40, 127); |
40b5cda2 GC |
108 | } |
109 | ||
110 | /* two fans, each with low fan speed limit */ | |
111 | static 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 */ | |
123 | static inline u8 AOUT_TO_REG(unsigned long val) | |
124 | { | |
2a844c14 | 125 | return clamp_val(SCALE(val, 255, 1250), 0, 255); |
40b5cda2 GC |
126 | } |
127 | ||
128 | static inline unsigned int AOUT_FROM_REG(u8 reg) | |
129 | { | |
130 | return SCALE(reg, 1250, 255); | |
131 | } | |
132 | ||
7fae8283 JD |
133 | static int adm9240_probe(struct i2c_client *client, |
134 | const struct i2c_device_id *id); | |
310ec792 | 135 | static int adm9240_detect(struct i2c_client *client, |
7fae8283 | 136 | struct i2c_board_info *info); |
40b5cda2 | 137 | static void adm9240_init_client(struct i2c_client *client); |
7fae8283 | 138 | static int adm9240_remove(struct i2c_client *client); |
40b5cda2 GC |
139 | static struct adm9240_data *adm9240_update_device(struct device *dev); |
140 | ||
141 | /* driver data */ | |
7fae8283 JD |
142 | static const struct i2c_device_id adm9240_id[] = { |
143 | { "adm9240", adm9240 }, | |
144 | { "ds1780", ds1780 }, | |
145 | { "lm81", lm81 }, | |
146 | { } | |
147 | }; | |
148 | MODULE_DEVICE_TABLE(i2c, adm9240_id); | |
149 | ||
40b5cda2 | 150 | static struct i2c_driver adm9240_driver = { |
7fae8283 | 151 | .class = I2C_CLASS_HWMON, |
cdaf7934 | 152 | .driver = { |
cdaf7934 LR |
153 | .name = "adm9240", |
154 | }, | |
7fae8283 JD |
155 | .probe = adm9240_probe, |
156 | .remove = adm9240_remove, | |
157 | .id_table = adm9240_id, | |
158 | .detect = adm9240_detect, | |
c3813d6a | 159 | .address_list = normal_i2c, |
40b5cda2 GC |
160 | }; |
161 | ||
162 | /* per client data */ | |
163 | struct adm9240_data { | |
1beeffe4 | 164 | struct device *hwmon_dev; |
9a61bf63 | 165 | struct mutex update_lock; |
40b5cda2 GC |
166 | char valid; |
167 | unsigned long last_updated_measure; | |
168 | unsigned long last_updated_config; | |
169 | ||
170 | u8 in[6]; /* ro in0_input */ | |
171 | u8 in_max[6]; /* rw in0_max */ | |
172 | u8 in_min[6]; /* rw in0_min */ | |
173 | u8 fan[2]; /* ro fan1_input */ | |
174 | u8 fan_min[2]; /* rw fan1_min */ | |
175 | u8 fan_div[2]; /* rw fan1_div, read-only accessor */ | |
176 | s16 temp; /* ro temp1_input, 9-bit sign-extended */ | |
c7461a66 | 177 | s8 temp_max[2]; /* rw 0 -> temp_max, 1 -> temp_max_hyst */ |
40b5cda2 | 178 | u16 alarms; /* ro alarms */ |
8e8f9289 | 179 | u8 aout; /* rw aout_output */ |
40b5cda2 GC |
180 | u8 vid; /* ro vid */ |
181 | u8 vrm; /* -- vrm set on startup, no accessor */ | |
182 | }; | |
183 | ||
40b5cda2 GC |
184 | /*** sysfs accessors ***/ |
185 | ||
186 | /* temperature */ | |
c7461a66 GC |
187 | static ssize_t show_temp(struct device *dev, struct device_attribute *dummy, |
188 | char *buf) | |
189 | { | |
190 | struct adm9240_data *data = adm9240_update_device(dev); | |
191 | return sprintf(buf, "%d\n", data->temp * 500); /* 9-bit value */ | |
192 | } | |
193 | ||
194 | static ssize_t show_max(struct device *dev, struct device_attribute *devattr, | |
195 | char *buf) | |
196 | { | |
197 | struct sensor_device_attribute *attr = to_sensor_dev_attr(devattr); | |
198 | struct adm9240_data *data = adm9240_update_device(dev); | |
199 | return sprintf(buf, "%d\n", data->temp_max[attr->index] * 1000); | |
200 | } | |
201 | ||
202 | static ssize_t set_max(struct device *dev, struct device_attribute *devattr, | |
203 | const char *buf, size_t count) | |
204 | { | |
205 | struct sensor_device_attribute *attr = to_sensor_dev_attr(devattr); | |
206 | struct i2c_client *client = to_i2c_client(dev); | |
207 | struct adm9240_data *data = i2c_get_clientdata(client); | |
c387e4eb GR |
208 | long val; |
209 | int err; | |
210 | ||
211 | err = kstrtol(buf, 10, &val); | |
212 | if (err) | |
213 | return err; | |
c7461a66 | 214 | |
9a61bf63 | 215 | mutex_lock(&data->update_lock); |
c7461a66 GC |
216 | data->temp_max[attr->index] = TEMP_TO_REG(val); |
217 | i2c_smbus_write_byte_data(client, ADM9240_REG_TEMP_MAX(attr->index), | |
218 | data->temp_max[attr->index]); | |
9a61bf63 | 219 | mutex_unlock(&data->update_lock); |
c7461a66 GC |
220 | return count; |
221 | } | |
222 | ||
40b5cda2 | 223 | static DEVICE_ATTR(temp1_input, S_IRUGO, show_temp, NULL); |
c7461a66 GC |
224 | static SENSOR_DEVICE_ATTR(temp1_max, S_IWUSR | S_IRUGO, |
225 | show_max, set_max, 0); | |
226 | static SENSOR_DEVICE_ATTR(temp1_max_hyst, S_IWUSR | S_IRUGO, | |
227 | show_max, set_max, 1); | |
40b5cda2 GC |
228 | |
229 | /* voltage */ | |
c7461a66 GC |
230 | static ssize_t show_in(struct device *dev, struct device_attribute *devattr, |
231 | char *buf) | |
40b5cda2 | 232 | { |
c7461a66 | 233 | struct sensor_device_attribute *attr = to_sensor_dev_attr(devattr); |
40b5cda2 | 234 | struct adm9240_data *data = adm9240_update_device(dev); |
c7461a66 GC |
235 | return sprintf(buf, "%d\n", IN_FROM_REG(data->in[attr->index], |
236 | attr->index)); | |
40b5cda2 GC |
237 | } |
238 | ||
e415e48b JD |
239 | static ssize_t show_in_min(struct device *dev, |
240 | struct device_attribute *devattr, char *buf) | |
40b5cda2 | 241 | { |
c7461a66 | 242 | struct sensor_device_attribute *attr = to_sensor_dev_attr(devattr); |
40b5cda2 | 243 | struct adm9240_data *data = adm9240_update_device(dev); |
c7461a66 GC |
244 | return sprintf(buf, "%d\n", IN_FROM_REG(data->in_min[attr->index], |
245 | attr->index)); | |
40b5cda2 GC |
246 | } |
247 | ||
e415e48b JD |
248 | static ssize_t show_in_max(struct device *dev, |
249 | struct device_attribute *devattr, char *buf) | |
40b5cda2 | 250 | { |
c7461a66 | 251 | struct sensor_device_attribute *attr = to_sensor_dev_attr(devattr); |
40b5cda2 | 252 | struct adm9240_data *data = adm9240_update_device(dev); |
c7461a66 GC |
253 | return sprintf(buf, "%d\n", IN_FROM_REG(data->in_max[attr->index], |
254 | attr->index)); | |
40b5cda2 GC |
255 | } |
256 | ||
e415e48b JD |
257 | static ssize_t set_in_min(struct device *dev, |
258 | struct device_attribute *devattr, | |
c7461a66 | 259 | const char *buf, size_t count) |
40b5cda2 | 260 | { |
c7461a66 | 261 | struct sensor_device_attribute *attr = to_sensor_dev_attr(devattr); |
40b5cda2 GC |
262 | struct i2c_client *client = to_i2c_client(dev); |
263 | struct adm9240_data *data = i2c_get_clientdata(client); | |
c387e4eb GR |
264 | unsigned long val; |
265 | int err; | |
266 | ||
267 | err = kstrtoul(buf, 10, &val); | |
268 | if (err) | |
269 | return err; | |
40b5cda2 | 270 | |
9a61bf63 | 271 | mutex_lock(&data->update_lock); |
c7461a66 GC |
272 | data->in_min[attr->index] = IN_TO_REG(val, attr->index); |
273 | i2c_smbus_write_byte_data(client, ADM9240_REG_IN_MIN(attr->index), | |
274 | data->in_min[attr->index]); | |
9a61bf63 | 275 | mutex_unlock(&data->update_lock); |
40b5cda2 GC |
276 | return count; |
277 | } | |
278 | ||
e415e48b JD |
279 | static ssize_t set_in_max(struct device *dev, |
280 | struct device_attribute *devattr, | |
c7461a66 | 281 | const char *buf, size_t count) |
40b5cda2 | 282 | { |
c7461a66 | 283 | struct sensor_device_attribute *attr = to_sensor_dev_attr(devattr); |
40b5cda2 GC |
284 | struct i2c_client *client = to_i2c_client(dev); |
285 | struct adm9240_data *data = i2c_get_clientdata(client); | |
c387e4eb GR |
286 | unsigned long val; |
287 | int err; | |
288 | ||
289 | err = kstrtoul(buf, 10, &val); | |
290 | if (err) | |
291 | return err; | |
40b5cda2 | 292 | |
9a61bf63 | 293 | mutex_lock(&data->update_lock); |
c7461a66 GC |
294 | data->in_max[attr->index] = IN_TO_REG(val, attr->index); |
295 | i2c_smbus_write_byte_data(client, ADM9240_REG_IN_MAX(attr->index), | |
296 | data->in_max[attr->index]); | |
9a61bf63 | 297 | mutex_unlock(&data->update_lock); |
40b5cda2 GC |
298 | return count; |
299 | } | |
300 | ||
c7461a66 | 301 | #define vin(nr) \ |
c387e4eb | 302 | static SENSOR_DEVICE_ATTR(in##nr##_input, S_IRUGO, \ |
c7461a66 GC |
303 | show_in, NULL, nr); \ |
304 | static SENSOR_DEVICE_ATTR(in##nr##_min, S_IRUGO | S_IWUSR, \ | |
305 | show_in_min, set_in_min, nr); \ | |
306 | static SENSOR_DEVICE_ATTR(in##nr##_max, S_IRUGO | S_IWUSR, \ | |
307 | show_in_max, set_in_max, nr); | |
308 | ||
309 | vin(0); | |
310 | vin(1); | |
311 | vin(2); | |
312 | vin(3); | |
313 | vin(4); | |
314 | vin(5); | |
40b5cda2 GC |
315 | |
316 | /* fans */ | |
c7461a66 GC |
317 | static ssize_t show_fan(struct device *dev, |
318 | struct device_attribute *devattr, char *buf) | |
40b5cda2 | 319 | { |
c7461a66 | 320 | struct sensor_device_attribute *attr = to_sensor_dev_attr(devattr); |
40b5cda2 | 321 | struct adm9240_data *data = adm9240_update_device(dev); |
c7461a66 GC |
322 | return sprintf(buf, "%d\n", FAN_FROM_REG(data->fan[attr->index], |
323 | 1 << data->fan_div[attr->index])); | |
40b5cda2 GC |
324 | } |
325 | ||
c7461a66 GC |
326 | static ssize_t show_fan_min(struct device *dev, |
327 | struct device_attribute *devattr, char *buf) | |
40b5cda2 | 328 | { |
c7461a66 | 329 | struct sensor_device_attribute *attr = to_sensor_dev_attr(devattr); |
40b5cda2 | 330 | struct adm9240_data *data = adm9240_update_device(dev); |
c7461a66 GC |
331 | return sprintf(buf, "%d\n", FAN_FROM_REG(data->fan_min[attr->index], |
332 | 1 << data->fan_div[attr->index])); | |
40b5cda2 GC |
333 | } |
334 | ||
c7461a66 GC |
335 | static ssize_t show_fan_div(struct device *dev, |
336 | struct device_attribute *devattr, char *buf) | |
40b5cda2 | 337 | { |
c7461a66 | 338 | struct sensor_device_attribute *attr = to_sensor_dev_attr(devattr); |
40b5cda2 | 339 | struct adm9240_data *data = adm9240_update_device(dev); |
c7461a66 | 340 | return sprintf(buf, "%d\n", 1 << data->fan_div[attr->index]); |
40b5cda2 GC |
341 | } |
342 | ||
343 | /* write new fan div, callers must hold data->update_lock */ | |
344 | static void adm9240_write_fan_div(struct i2c_client *client, int nr, | |
345 | u8 fan_div) | |
346 | { | |
347 | u8 reg, old, shift = (nr + 2) * 2; | |
348 | ||
205cf13e | 349 | reg = i2c_smbus_read_byte_data(client, ADM9240_REG_VID_FAN_DIV); |
40b5cda2 GC |
350 | old = (reg >> shift) & 3; |
351 | reg &= ~(3 << shift); | |
352 | reg |= (fan_div << shift); | |
205cf13e | 353 | i2c_smbus_write_byte_data(client, ADM9240_REG_VID_FAN_DIV, reg); |
b55f3757 GR |
354 | dev_dbg(&client->dev, |
355 | "fan%d clock divider changed from %u to %u\n", | |
356 | nr + 1, 1 << old, 1 << fan_div); | |
40b5cda2 GC |
357 | } |
358 | ||
e415e48b | 359 | /* |
40b5cda2 GC |
360 | * set fan speed low limit: |
361 | * | |
362 | * - value is zero: disable fan speed low limit alarm | |
363 | * | |
364 | * - value is below fan speed measurement range: enable fan speed low | |
365 | * limit alarm to be asserted while fan speed too slow to measure | |
366 | * | |
367 | * - otherwise: select fan clock divider to suit fan speed low limit, | |
368 | * measurement code may adjust registers to ensure fan speed reading | |
369 | */ | |
c7461a66 GC |
370 | static ssize_t set_fan_min(struct device *dev, |
371 | struct device_attribute *devattr, | |
372 | const char *buf, size_t count) | |
40b5cda2 | 373 | { |
c7461a66 | 374 | struct sensor_device_attribute *attr = to_sensor_dev_attr(devattr); |
40b5cda2 GC |
375 | struct i2c_client *client = to_i2c_client(dev); |
376 | struct adm9240_data *data = i2c_get_clientdata(client); | |
c7461a66 | 377 | int nr = attr->index; |
40b5cda2 | 378 | u8 new_div; |
c387e4eb GR |
379 | unsigned long val; |
380 | int err; | |
381 | ||
382 | err = kstrtoul(buf, 10, &val); | |
383 | if (err) | |
384 | return err; | |
40b5cda2 | 385 | |
9a61bf63 | 386 | mutex_lock(&data->update_lock); |
40b5cda2 GC |
387 | |
388 | if (!val) { | |
389 | data->fan_min[nr] = 255; | |
390 | new_div = data->fan_div[nr]; | |
391 | ||
392 | dev_dbg(&client->dev, "fan%u low limit set disabled\n", | |
393 | nr + 1); | |
394 | ||
395 | } else if (val < 1350000 / (8 * 254)) { | |
396 | new_div = 3; | |
397 | data->fan_min[nr] = 254; | |
398 | ||
399 | dev_dbg(&client->dev, "fan%u low limit set minimum %u\n", | |
400 | nr + 1, FAN_FROM_REG(254, 1 << new_div)); | |
401 | ||
402 | } else { | |
403 | unsigned int new_min = 1350000 / val; | |
404 | ||
405 | new_div = 0; | |
406 | while (new_min > 192 && new_div < 3) { | |
407 | new_div++; | |
408 | new_min /= 2; | |
409 | } | |
410 | if (!new_min) /* keep > 0 */ | |
411 | new_min++; | |
412 | ||
413 | data->fan_min[nr] = new_min; | |
414 | ||
415 | dev_dbg(&client->dev, "fan%u low limit set fan speed %u\n", | |
416 | nr + 1, FAN_FROM_REG(new_min, 1 << new_div)); | |
417 | } | |
418 | ||
419 | if (new_div != data->fan_div[nr]) { | |
420 | data->fan_div[nr] = new_div; | |
421 | adm9240_write_fan_div(client, nr, new_div); | |
422 | } | |
205cf13e | 423 | i2c_smbus_write_byte_data(client, ADM9240_REG_FAN_MIN(nr), |
40b5cda2 GC |
424 | data->fan_min[nr]); |
425 | ||
9a61bf63 | 426 | mutex_unlock(&data->update_lock); |
40b5cda2 GC |
427 | return count; |
428 | } | |
429 | ||
c7461a66 GC |
430 | #define fan(nr) \ |
431 | static SENSOR_DEVICE_ATTR(fan##nr##_input, S_IRUGO, \ | |
432 | show_fan, NULL, nr - 1); \ | |
433 | static SENSOR_DEVICE_ATTR(fan##nr##_div, S_IRUGO, \ | |
434 | show_fan_div, NULL, nr - 1); \ | |
435 | static SENSOR_DEVICE_ATTR(fan##nr##_min, S_IRUGO | S_IWUSR, \ | |
436 | show_fan_min, set_fan_min, nr - 1); | |
437 | ||
438 | fan(1); | |
439 | fan(2); | |
40b5cda2 GC |
440 | |
441 | /* alarms */ | |
e415e48b JD |
442 | static ssize_t show_alarms(struct device *dev, |
443 | struct device_attribute *attr, char *buf) | |
40b5cda2 GC |
444 | { |
445 | struct adm9240_data *data = adm9240_update_device(dev); | |
446 | return sprintf(buf, "%u\n", data->alarms); | |
447 | } | |
448 | static DEVICE_ATTR(alarms, S_IRUGO, show_alarms, NULL); | |
449 | ||
360f9452 JD |
450 | static ssize_t show_alarm(struct device *dev, |
451 | struct device_attribute *attr, char *buf) | |
452 | { | |
453 | int bitnr = to_sensor_dev_attr(attr)->index; | |
454 | struct adm9240_data *data = adm9240_update_device(dev); | |
455 | return sprintf(buf, "%u\n", (data->alarms >> bitnr) & 1); | |
456 | } | |
457 | static SENSOR_DEVICE_ATTR(in0_alarm, S_IRUGO, show_alarm, NULL, 0); | |
458 | static SENSOR_DEVICE_ATTR(in1_alarm, S_IRUGO, show_alarm, NULL, 1); | |
459 | static SENSOR_DEVICE_ATTR(in2_alarm, S_IRUGO, show_alarm, NULL, 2); | |
460 | static SENSOR_DEVICE_ATTR(in3_alarm, S_IRUGO, show_alarm, NULL, 3); | |
461 | static SENSOR_DEVICE_ATTR(in4_alarm, S_IRUGO, show_alarm, NULL, 8); | |
462 | static SENSOR_DEVICE_ATTR(in5_alarm, S_IRUGO, show_alarm, NULL, 9); | |
463 | static SENSOR_DEVICE_ATTR(temp1_alarm, S_IRUGO, show_alarm, NULL, 4); | |
464 | static SENSOR_DEVICE_ATTR(fan1_alarm, S_IRUGO, show_alarm, NULL, 6); | |
465 | static SENSOR_DEVICE_ATTR(fan2_alarm, S_IRUGO, show_alarm, NULL, 7); | |
466 | ||
40b5cda2 | 467 | /* vid */ |
e415e48b JD |
468 | static ssize_t show_vid(struct device *dev, |
469 | struct device_attribute *attr, char *buf) | |
40b5cda2 GC |
470 | { |
471 | struct adm9240_data *data = adm9240_update_device(dev); | |
472 | return sprintf(buf, "%d\n", vid_from_reg(data->vid, data->vrm)); | |
473 | } | |
474 | static DEVICE_ATTR(cpu0_vid, S_IRUGO, show_vid, NULL); | |
475 | ||
476 | /* analog output */ | |
e415e48b JD |
477 | static ssize_t show_aout(struct device *dev, |
478 | struct device_attribute *attr, char *buf) | |
40b5cda2 GC |
479 | { |
480 | struct adm9240_data *data = adm9240_update_device(dev); | |
481 | return sprintf(buf, "%d\n", AOUT_FROM_REG(data->aout)); | |
482 | } | |
483 | ||
e415e48b JD |
484 | static ssize_t set_aout(struct device *dev, |
485 | struct device_attribute *attr, | |
486 | const char *buf, size_t count) | |
40b5cda2 GC |
487 | { |
488 | struct i2c_client *client = to_i2c_client(dev); | |
489 | struct adm9240_data *data = i2c_get_clientdata(client); | |
c387e4eb GR |
490 | long val; |
491 | int err; | |
492 | ||
493 | err = kstrtol(buf, 10, &val); | |
494 | if (err) | |
495 | return err; | |
40b5cda2 | 496 | |
9a61bf63 | 497 | mutex_lock(&data->update_lock); |
40b5cda2 | 498 | data->aout = AOUT_TO_REG(val); |
205cf13e | 499 | i2c_smbus_write_byte_data(client, ADM9240_REG_ANALOG_OUT, data->aout); |
9a61bf63 | 500 | mutex_unlock(&data->update_lock); |
40b5cda2 GC |
501 | return count; |
502 | } | |
503 | static DEVICE_ATTR(aout_output, S_IRUGO | S_IWUSR, show_aout, set_aout); | |
504 | ||
0de2b244 JD |
505 | static ssize_t chassis_clear(struct device *dev, |
506 | struct device_attribute *attr, | |
507 | const char *buf, size_t count) | |
508 | { | |
509 | struct i2c_client *client = to_i2c_client(dev); | |
510 | struct adm9240_data *data = i2c_get_clientdata(client); | |
511 | unsigned long val; | |
512 | ||
179c4fdb | 513 | if (kstrtoul(buf, 10, &val) || val != 0) |
0de2b244 JD |
514 | return -EINVAL; |
515 | ||
516 | mutex_lock(&data->update_lock); | |
517 | i2c_smbus_write_byte_data(client, ADM9240_REG_CHASSIS_CLEAR, 0x80); | |
518 | data->valid = 0; /* Force cache refresh */ | |
519 | mutex_unlock(&data->update_lock); | |
520 | dev_dbg(&client->dev, "chassis intrusion latch cleared\n"); | |
521 | ||
522 | return count; | |
523 | } | |
524 | static SENSOR_DEVICE_ATTR(intrusion0_alarm, S_IRUGO | S_IWUSR, show_alarm, | |
525 | chassis_clear, 12); | |
40b5cda2 | 526 | |
681c6f7a MH |
527 | static struct attribute *adm9240_attributes[] = { |
528 | &sensor_dev_attr_in0_input.dev_attr.attr, | |
529 | &sensor_dev_attr_in0_min.dev_attr.attr, | |
530 | &sensor_dev_attr_in0_max.dev_attr.attr, | |
360f9452 | 531 | &sensor_dev_attr_in0_alarm.dev_attr.attr, |
681c6f7a MH |
532 | &sensor_dev_attr_in1_input.dev_attr.attr, |
533 | &sensor_dev_attr_in1_min.dev_attr.attr, | |
534 | &sensor_dev_attr_in1_max.dev_attr.attr, | |
360f9452 | 535 | &sensor_dev_attr_in1_alarm.dev_attr.attr, |
681c6f7a MH |
536 | &sensor_dev_attr_in2_input.dev_attr.attr, |
537 | &sensor_dev_attr_in2_min.dev_attr.attr, | |
538 | &sensor_dev_attr_in2_max.dev_attr.attr, | |
360f9452 | 539 | &sensor_dev_attr_in2_alarm.dev_attr.attr, |
681c6f7a MH |
540 | &sensor_dev_attr_in3_input.dev_attr.attr, |
541 | &sensor_dev_attr_in3_min.dev_attr.attr, | |
542 | &sensor_dev_attr_in3_max.dev_attr.attr, | |
360f9452 | 543 | &sensor_dev_attr_in3_alarm.dev_attr.attr, |
681c6f7a MH |
544 | &sensor_dev_attr_in4_input.dev_attr.attr, |
545 | &sensor_dev_attr_in4_min.dev_attr.attr, | |
546 | &sensor_dev_attr_in4_max.dev_attr.attr, | |
360f9452 | 547 | &sensor_dev_attr_in4_alarm.dev_attr.attr, |
681c6f7a MH |
548 | &sensor_dev_attr_in5_input.dev_attr.attr, |
549 | &sensor_dev_attr_in5_min.dev_attr.attr, | |
550 | &sensor_dev_attr_in5_max.dev_attr.attr, | |
360f9452 | 551 | &sensor_dev_attr_in5_alarm.dev_attr.attr, |
681c6f7a MH |
552 | &dev_attr_temp1_input.attr, |
553 | &sensor_dev_attr_temp1_max.dev_attr.attr, | |
554 | &sensor_dev_attr_temp1_max_hyst.dev_attr.attr, | |
360f9452 | 555 | &sensor_dev_attr_temp1_alarm.dev_attr.attr, |
681c6f7a MH |
556 | &sensor_dev_attr_fan1_input.dev_attr.attr, |
557 | &sensor_dev_attr_fan1_div.dev_attr.attr, | |
558 | &sensor_dev_attr_fan1_min.dev_attr.attr, | |
360f9452 | 559 | &sensor_dev_attr_fan1_alarm.dev_attr.attr, |
681c6f7a MH |
560 | &sensor_dev_attr_fan2_input.dev_attr.attr, |
561 | &sensor_dev_attr_fan2_div.dev_attr.attr, | |
562 | &sensor_dev_attr_fan2_min.dev_attr.attr, | |
360f9452 | 563 | &sensor_dev_attr_fan2_alarm.dev_attr.attr, |
681c6f7a MH |
564 | &dev_attr_alarms.attr, |
565 | &dev_attr_aout_output.attr, | |
0de2b244 | 566 | &sensor_dev_attr_intrusion0_alarm.dev_attr.attr, |
681c6f7a MH |
567 | &dev_attr_cpu0_vid.attr, |
568 | NULL | |
569 | }; | |
570 | ||
571 | static const struct attribute_group adm9240_group = { | |
572 | .attrs = adm9240_attributes, | |
573 | }; | |
574 | ||
40b5cda2 GC |
575 | |
576 | /*** sensor chip detect and driver install ***/ | |
577 | ||
7fae8283 | 578 | /* Return 0 if detection is successful, -ENODEV otherwise */ |
310ec792 | 579 | static int adm9240_detect(struct i2c_client *new_client, |
7fae8283 | 580 | struct i2c_board_info *info) |
40b5cda2 | 581 | { |
7fae8283 | 582 | struct i2c_adapter *adapter = new_client->adapter; |
40b5cda2 | 583 | const char *name = ""; |
7fae8283 | 584 | int address = new_client->addr; |
40b5cda2 GC |
585 | u8 man_id, die_rev; |
586 | ||
587 | if (!i2c_check_functionality(adapter, I2C_FUNC_SMBUS_BYTE_DATA)) | |
7fae8283 | 588 | return -ENODEV; |
40b5cda2 | 589 | |
52df6440 JD |
590 | /* verify chip: reg address should match i2c address */ |
591 | if (i2c_smbus_read_byte_data(new_client, ADM9240_REG_I2C_ADDR) | |
592 | != address) { | |
593 | dev_err(&adapter->dev, "detect fail: address match, 0x%02x\n", | |
594 | address); | |
595 | return -ENODEV; | |
40b5cda2 GC |
596 | } |
597 | ||
52df6440 JD |
598 | /* check known chip manufacturer */ |
599 | man_id = i2c_smbus_read_byte_data(new_client, ADM9240_REG_MAN_ID); | |
600 | if (man_id == 0x23) { | |
40b5cda2 | 601 | name = "adm9240"; |
52df6440 | 602 | } else if (man_id == 0xda) { |
40b5cda2 | 603 | name = "ds1780"; |
52df6440 | 604 | } else if (man_id == 0x01) { |
40b5cda2 | 605 | name = "lm81"; |
52df6440 JD |
606 | } else { |
607 | dev_err(&adapter->dev, "detect fail: unknown manuf, 0x%02x\n", | |
608 | man_id); | |
609 | return -ENODEV; | |
40b5cda2 | 610 | } |
52df6440 JD |
611 | |
612 | /* successful detect, print chip info */ | |
613 | die_rev = i2c_smbus_read_byte_data(new_client, ADM9240_REG_DIE_REV); | |
614 | dev_info(&adapter->dev, "found %s revision %u\n", | |
615 | man_id == 0x23 ? "ADM9240" : | |
616 | man_id == 0xda ? "DS1780" : "LM81", die_rev); | |
617 | ||
7fae8283 | 618 | strlcpy(info->type, name, I2C_NAME_SIZE); |
40b5cda2 | 619 | |
7fae8283 JD |
620 | return 0; |
621 | } | |
40b5cda2 | 622 | |
7fae8283 JD |
623 | static int adm9240_probe(struct i2c_client *new_client, |
624 | const struct i2c_device_id *id) | |
625 | { | |
626 | struct adm9240_data *data; | |
627 | int err; | |
628 | ||
e5ebb772 GR |
629 | data = devm_kzalloc(&new_client->dev, sizeof(*data), GFP_KERNEL); |
630 | if (!data) | |
631 | return -ENOMEM; | |
7fae8283 JD |
632 | |
633 | i2c_set_clientdata(new_client, data); | |
634 | mutex_init(&data->update_lock); | |
40b5cda2 GC |
635 | |
636 | adm9240_init_client(new_client); | |
637 | ||
638 | /* populate sysfs filesystem */ | |
c387e4eb GR |
639 | err = sysfs_create_group(&new_client->dev.kobj, &adm9240_group); |
640 | if (err) | |
e5ebb772 | 641 | return err; |
681c6f7a | 642 | |
1beeffe4 TJ |
643 | data->hwmon_dev = hwmon_device_register(&new_client->dev); |
644 | if (IS_ERR(data->hwmon_dev)) { | |
645 | err = PTR_ERR(data->hwmon_dev); | |
681c6f7a | 646 | goto exit_remove; |
943b0830 MH |
647 | } |
648 | ||
40b5cda2 | 649 | return 0; |
943b0830 | 650 | |
681c6f7a MH |
651 | exit_remove: |
652 | sysfs_remove_group(&new_client->dev.kobj, &adm9240_group); | |
40b5cda2 GC |
653 | return err; |
654 | } | |
655 | ||
7fae8283 | 656 | static int adm9240_remove(struct i2c_client *client) |
40b5cda2 | 657 | { |
943b0830 | 658 | struct adm9240_data *data = i2c_get_clientdata(client); |
40b5cda2 | 659 | |
1beeffe4 | 660 | hwmon_device_unregister(data->hwmon_dev); |
681c6f7a | 661 | sysfs_remove_group(&client->dev.kobj, &adm9240_group); |
943b0830 | 662 | |
40b5cda2 GC |
663 | return 0; |
664 | } | |
665 | ||
666 | static void adm9240_init_client(struct i2c_client *client) | |
667 | { | |
668 | struct adm9240_data *data = i2c_get_clientdata(client); | |
205cf13e GC |
669 | u8 conf = i2c_smbus_read_byte_data(client, ADM9240_REG_CONFIG); |
670 | u8 mode = i2c_smbus_read_byte_data(client, ADM9240_REG_TEMP_CONF) & 3; | |
40b5cda2 | 671 | |
303760b4 | 672 | data->vrm = vid_which_vrm(); /* need this to report vid as mV */ |
40b5cda2 | 673 | |
8e8f9289 GC |
674 | dev_info(&client->dev, "Using VRM: %d.%d\n", data->vrm / 10, |
675 | data->vrm % 10); | |
676 | ||
40b5cda2 GC |
677 | if (conf & 1) { /* measurement cycle running: report state */ |
678 | ||
679 | dev_info(&client->dev, "status: config 0x%02x mode %u\n", | |
680 | conf, mode); | |
681 | ||
682 | } else { /* cold start: open limits before starting chip */ | |
683 | int i; | |
684 | ||
c387e4eb | 685 | for (i = 0; i < 6; i++) { |
205cf13e | 686 | i2c_smbus_write_byte_data(client, |
40b5cda2 | 687 | ADM9240_REG_IN_MIN(i), 0); |
205cf13e | 688 | i2c_smbus_write_byte_data(client, |
40b5cda2 GC |
689 | ADM9240_REG_IN_MAX(i), 255); |
690 | } | |
205cf13e GC |
691 | i2c_smbus_write_byte_data(client, |
692 | ADM9240_REG_FAN_MIN(0), 255); | |
693 | i2c_smbus_write_byte_data(client, | |
694 | ADM9240_REG_FAN_MIN(1), 255); | |
695 | i2c_smbus_write_byte_data(client, | |
c7461a66 | 696 | ADM9240_REG_TEMP_MAX(0), 127); |
205cf13e | 697 | i2c_smbus_write_byte_data(client, |
c7461a66 | 698 | ADM9240_REG_TEMP_MAX(1), 127); |
40b5cda2 GC |
699 | |
700 | /* start measurement cycle */ | |
205cf13e | 701 | i2c_smbus_write_byte_data(client, ADM9240_REG_CONFIG, 1); |
40b5cda2 | 702 | |
b55f3757 GR |
703 | dev_info(&client->dev, |
704 | "cold start: config was 0x%02x mode %u\n", conf, mode); | |
40b5cda2 GC |
705 | } |
706 | } | |
707 | ||
708 | static struct adm9240_data *adm9240_update_device(struct device *dev) | |
709 | { | |
710 | struct i2c_client *client = to_i2c_client(dev); | |
711 | struct adm9240_data *data = i2c_get_clientdata(client); | |
712 | int i; | |
713 | ||
9a61bf63 | 714 | mutex_lock(&data->update_lock); |
40b5cda2 GC |
715 | |
716 | /* minimum measurement cycle: 1.75 seconds */ | |
717 | if (time_after(jiffies, data->last_updated_measure + (HZ * 7 / 4)) | |
718 | || !data->valid) { | |
719 | ||
c387e4eb | 720 | for (i = 0; i < 6; i++) { /* read voltages */ |
205cf13e | 721 | data->in[i] = i2c_smbus_read_byte_data(client, |
40b5cda2 GC |
722 | ADM9240_REG_IN(i)); |
723 | } | |
205cf13e | 724 | data->alarms = i2c_smbus_read_byte_data(client, |
40b5cda2 | 725 | ADM9240_REG_INT(0)) | |
205cf13e | 726 | i2c_smbus_read_byte_data(client, |
40b5cda2 GC |
727 | ADM9240_REG_INT(1)) << 8; |
728 | ||
c387e4eb GR |
729 | /* |
730 | * read temperature: assume temperature changes less than | |
40b5cda2 | 731 | * 0.5'C per two measurement cycles thus ignore possible |
c387e4eb GR |
732 | * but unlikely aliasing error on lsb reading. --Grant |
733 | */ | |
205cf13e | 734 | data->temp = ((i2c_smbus_read_byte_data(client, |
40b5cda2 | 735 | ADM9240_REG_TEMP) << 8) | |
205cf13e | 736 | i2c_smbus_read_byte_data(client, |
40b5cda2 GC |
737 | ADM9240_REG_TEMP_CONF)) / 128; |
738 | ||
c387e4eb | 739 | for (i = 0; i < 2; i++) { /* read fans */ |
205cf13e | 740 | data->fan[i] = i2c_smbus_read_byte_data(client, |
40b5cda2 GC |
741 | ADM9240_REG_FAN(i)); |
742 | ||
743 | /* adjust fan clock divider on overflow */ | |
744 | if (data->valid && data->fan[i] == 255 && | |
745 | data->fan_div[i] < 3) { | |
746 | ||
747 | adm9240_write_fan_div(client, i, | |
748 | ++data->fan_div[i]); | |
749 | ||
750 | /* adjust fan_min if active, but not to 0 */ | |
751 | if (data->fan_min[i] < 255 && | |
752 | data->fan_min[i] >= 2) | |
753 | data->fan_min[i] /= 2; | |
754 | } | |
755 | } | |
756 | data->last_updated_measure = jiffies; | |
757 | } | |
758 | ||
759 | /* minimum config reading cycle: 300 seconds */ | |
760 | if (time_after(jiffies, data->last_updated_config + (HZ * 300)) | |
761 | || !data->valid) { | |
762 | ||
c387e4eb | 763 | for (i = 0; i < 6; i++) { |
205cf13e | 764 | data->in_min[i] = i2c_smbus_read_byte_data(client, |
40b5cda2 | 765 | ADM9240_REG_IN_MIN(i)); |
205cf13e | 766 | data->in_max[i] = i2c_smbus_read_byte_data(client, |
40b5cda2 GC |
767 | ADM9240_REG_IN_MAX(i)); |
768 | } | |
c387e4eb | 769 | for (i = 0; i < 2; i++) { |
205cf13e | 770 | data->fan_min[i] = i2c_smbus_read_byte_data(client, |
40b5cda2 GC |
771 | ADM9240_REG_FAN_MIN(i)); |
772 | } | |
c7461a66 GC |
773 | data->temp_max[0] = i2c_smbus_read_byte_data(client, |
774 | ADM9240_REG_TEMP_MAX(0)); | |
775 | data->temp_max[1] = i2c_smbus_read_byte_data(client, | |
776 | ADM9240_REG_TEMP_MAX(1)); | |
40b5cda2 GC |
777 | |
778 | /* read fan divs and 5-bit VID */ | |
205cf13e | 779 | i = i2c_smbus_read_byte_data(client, ADM9240_REG_VID_FAN_DIV); |
40b5cda2 GC |
780 | data->fan_div[0] = (i >> 4) & 3; |
781 | data->fan_div[1] = (i >> 6) & 3; | |
782 | data->vid = i & 0x0f; | |
205cf13e | 783 | data->vid |= (i2c_smbus_read_byte_data(client, |
40b5cda2 GC |
784 | ADM9240_REG_VID4) & 1) << 4; |
785 | /* read analog out */ | |
205cf13e | 786 | data->aout = i2c_smbus_read_byte_data(client, |
40b5cda2 GC |
787 | ADM9240_REG_ANALOG_OUT); |
788 | ||
789 | data->last_updated_config = jiffies; | |
790 | data->valid = 1; | |
791 | } | |
9a61bf63 | 792 | mutex_unlock(&data->update_lock); |
40b5cda2 GC |
793 | return data; |
794 | } | |
795 | ||
f0967eea | 796 | module_i2c_driver(adm9240_driver); |
40b5cda2 GC |
797 | |
798 | MODULE_AUTHOR("Michiel Rook <michiel@grendelproject.nl>, " | |
2ca7b961 | 799 | "Grant Coady <gcoady.lk@gmail.com> and others"); |
40b5cda2 GC |
800 | MODULE_DESCRIPTION("ADM9240/DS1780/LM81 driver"); |
801 | MODULE_LICENSE("GPL"); |