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40b5cda2 GC |
1 | /* |
2 | * adm9240.c Part of lm_sensors, Linux kernel modules for hardware | |
3 | * monitoring | |
4 | * | |
5 | * Copyright (C) 1999 Frodo Looijaard <frodol@dds.nl> | |
6 | * Philip Edelbrock <phil@netroedge.com> | |
7 | * Copyright (C) 2003 Michiel Rook <michiel@grendelproject.nl> | |
2ca7b961 | 8 | * Copyright (C) 2005 Grant Coady <gcoady.lk@gmail.com> with valuable |
40b5cda2 GC |
9 | * guidance from Jean Delvare |
10 | * | |
11 | * Driver supports Analog Devices ADM9240 | |
12 | * Dallas Semiconductor DS1780 | |
13 | * National Semiconductor LM81 | |
14 | * | |
15 | * ADM9240 is the reference, DS1780 and LM81 are register compatibles | |
16 | * | |
17 | * Voltage Six inputs are scaled by chip, VID also reported | |
18 | * Temperature Chip temperature to 0.5'C, maximum and max_hysteris | |
19 | * Fans 2 fans, low speed alarm, automatic fan clock divider | |
20 | * Alarms 16-bit map of active alarms | |
21 | * Analog Out 0..1250 mV output | |
22 | * | |
23 | * Chassis Intrusion: clear CI latch with 'echo 1 > chassis_clear' | |
24 | * | |
25 | * Test hardware: Intel SE440BX-2 desktop motherboard --Grant | |
26 | * | |
27 | * LM81 extended temp reading not implemented | |
28 | * | |
29 | * This program is free software; you can redistribute it and/or modify | |
30 | * it under the terms of the GNU General Public License as published by | |
31 | * the Free Software Foundation; either version 2 of the License, or | |
32 | * (at your option) any later version. | |
33 | * | |
34 | * This program is distributed in the hope that it will be useful, | |
35 | * but WITHOUT ANY WARRANTY; without even the implied warranty of | |
36 | * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the | |
37 | * GNU General Public License for more details. | |
38 | * | |
39 | * You should have received a copy of the GNU General Public License | |
40 | * along with this program; if not, write to the Free Software | |
41 | * Foundation, Inc., 675 Mass Ave, Cambridge, MA 02139, USA. | |
42 | */ | |
43 | ||
44 | #include <linux/init.h> | |
45 | #include <linux/module.h> | |
46 | #include <linux/slab.h> | |
47 | #include <linux/i2c.h> | |
c7461a66 | 48 | #include <linux/hwmon-sysfs.h> |
943b0830 | 49 | #include <linux/hwmon.h> |
303760b4 | 50 | #include <linux/hwmon-vid.h> |
943b0830 | 51 | #include <linux/err.h> |
9a61bf63 | 52 | #include <linux/mutex.h> |
40b5cda2 GC |
53 | |
54 | /* Addresses to scan */ | |
25e9c86d | 55 | static const unsigned short normal_i2c[] = { 0x2c, 0x2d, 0x2e, 0x2f, |
40b5cda2 GC |
56 | I2C_CLIENT_END }; |
57 | ||
e5e9f44c | 58 | enum chips { adm9240, ds1780, lm81 }; |
40b5cda2 GC |
59 | |
60 | /* ADM9240 registers */ | |
61 | #define ADM9240_REG_MAN_ID 0x3e | |
62 | #define ADM9240_REG_DIE_REV 0x3f | |
63 | #define ADM9240_REG_CONFIG 0x40 | |
64 | ||
65 | #define ADM9240_REG_IN(nr) (0x20 + (nr)) /* 0..5 */ | |
66 | #define ADM9240_REG_IN_MAX(nr) (0x2b + (nr) * 2) | |
67 | #define ADM9240_REG_IN_MIN(nr) (0x2c + (nr) * 2) | |
68 | #define ADM9240_REG_FAN(nr) (0x28 + (nr)) /* 0..1 */ | |
69 | #define ADM9240_REG_FAN_MIN(nr) (0x3b + (nr)) | |
70 | #define ADM9240_REG_INT(nr) (0x41 + (nr)) | |
71 | #define ADM9240_REG_INT_MASK(nr) (0x43 + (nr)) | |
72 | #define ADM9240_REG_TEMP 0x27 | |
c7461a66 | 73 | #define ADM9240_REG_TEMP_MAX(nr) (0x39 + (nr)) /* 0, 1 = high, hyst */ |
40b5cda2 GC |
74 | #define ADM9240_REG_ANALOG_OUT 0x19 |
75 | #define ADM9240_REG_CHASSIS_CLEAR 0x46 | |
76 | #define ADM9240_REG_VID_FAN_DIV 0x47 | |
77 | #define ADM9240_REG_I2C_ADDR 0x48 | |
78 | #define ADM9240_REG_VID4 0x49 | |
79 | #define ADM9240_REG_TEMP_CONF 0x4b | |
80 | ||
81 | /* generalised scaling with integer rounding */ | |
82 | static inline int SCALE(long val, int mul, int div) | |
83 | { | |
84 | if (val < 0) | |
85 | return (val * mul - div / 2) / div; | |
86 | else | |
87 | return (val * mul + div / 2) / div; | |
88 | } | |
89 | ||
90 | /* adm9240 internally scales voltage measurements */ | |
91 | static const u16 nom_mv[] = { 2500, 2700, 3300, 5000, 12000, 2700 }; | |
92 | ||
93 | static inline unsigned int IN_FROM_REG(u8 reg, int n) | |
94 | { | |
95 | return SCALE(reg, nom_mv[n], 192); | |
96 | } | |
97 | ||
98 | static inline u8 IN_TO_REG(unsigned long val, int n) | |
99 | { | |
100 | return SENSORS_LIMIT(SCALE(val, 192, nom_mv[n]), 0, 255); | |
101 | } | |
102 | ||
103 | /* temperature range: -40..125, 127 disables temperature alarm */ | |
104 | static inline s8 TEMP_TO_REG(long val) | |
105 | { | |
106 | return SENSORS_LIMIT(SCALE(val, 1, 1000), -40, 127); | |
107 | } | |
108 | ||
109 | /* two fans, each with low fan speed limit */ | |
110 | static inline unsigned int FAN_FROM_REG(u8 reg, u8 div) | |
111 | { | |
112 | if (!reg) /* error */ | |
113 | return -1; | |
114 | ||
115 | if (reg == 255) | |
116 | return 0; | |
117 | ||
118 | return SCALE(1350000, 1, reg * div); | |
119 | } | |
120 | ||
121 | /* analog out 0..1250mV */ | |
122 | static inline u8 AOUT_TO_REG(unsigned long val) | |
123 | { | |
124 | return SENSORS_LIMIT(SCALE(val, 255, 1250), 0, 255); | |
125 | } | |
126 | ||
127 | static inline unsigned int AOUT_FROM_REG(u8 reg) | |
128 | { | |
129 | return SCALE(reg, 1250, 255); | |
130 | } | |
131 | ||
7fae8283 JD |
132 | static int adm9240_probe(struct i2c_client *client, |
133 | const struct i2c_device_id *id); | |
310ec792 | 134 | static int adm9240_detect(struct i2c_client *client, |
7fae8283 | 135 | struct i2c_board_info *info); |
40b5cda2 | 136 | static void adm9240_init_client(struct i2c_client *client); |
7fae8283 | 137 | static int adm9240_remove(struct i2c_client *client); |
40b5cda2 GC |
138 | static struct adm9240_data *adm9240_update_device(struct device *dev); |
139 | ||
140 | /* driver data */ | |
7fae8283 JD |
141 | static const struct i2c_device_id adm9240_id[] = { |
142 | { "adm9240", adm9240 }, | |
143 | { "ds1780", ds1780 }, | |
144 | { "lm81", lm81 }, | |
145 | { } | |
146 | }; | |
147 | MODULE_DEVICE_TABLE(i2c, adm9240_id); | |
148 | ||
40b5cda2 | 149 | static struct i2c_driver adm9240_driver = { |
7fae8283 | 150 | .class = I2C_CLASS_HWMON, |
cdaf7934 | 151 | .driver = { |
cdaf7934 LR |
152 | .name = "adm9240", |
153 | }, | |
7fae8283 JD |
154 | .probe = adm9240_probe, |
155 | .remove = adm9240_remove, | |
156 | .id_table = adm9240_id, | |
157 | .detect = adm9240_detect, | |
c3813d6a | 158 | .address_list = normal_i2c, |
40b5cda2 GC |
159 | }; |
160 | ||
161 | /* per client data */ | |
162 | struct adm9240_data { | |
1beeffe4 | 163 | struct device *hwmon_dev; |
9a61bf63 | 164 | struct mutex update_lock; |
40b5cda2 GC |
165 | char valid; |
166 | unsigned long last_updated_measure; | |
167 | unsigned long last_updated_config; | |
168 | ||
169 | u8 in[6]; /* ro in0_input */ | |
170 | u8 in_max[6]; /* rw in0_max */ | |
171 | u8 in_min[6]; /* rw in0_min */ | |
172 | u8 fan[2]; /* ro fan1_input */ | |
173 | u8 fan_min[2]; /* rw fan1_min */ | |
174 | u8 fan_div[2]; /* rw fan1_div, read-only accessor */ | |
175 | s16 temp; /* ro temp1_input, 9-bit sign-extended */ | |
c7461a66 | 176 | s8 temp_max[2]; /* rw 0 -> temp_max, 1 -> temp_max_hyst */ |
40b5cda2 | 177 | u16 alarms; /* ro alarms */ |
8e8f9289 | 178 | u8 aout; /* rw aout_output */ |
40b5cda2 GC |
179 | u8 vid; /* ro vid */ |
180 | u8 vrm; /* -- vrm set on startup, no accessor */ | |
181 | }; | |
182 | ||
40b5cda2 GC |
183 | /*** sysfs accessors ***/ |
184 | ||
185 | /* temperature */ | |
c7461a66 GC |
186 | static ssize_t show_temp(struct device *dev, struct device_attribute *dummy, |
187 | char *buf) | |
188 | { | |
189 | struct adm9240_data *data = adm9240_update_device(dev); | |
190 | return sprintf(buf, "%d\n", data->temp * 500); /* 9-bit value */ | |
191 | } | |
192 | ||
193 | static ssize_t show_max(struct device *dev, struct device_attribute *devattr, | |
194 | char *buf) | |
195 | { | |
196 | struct sensor_device_attribute *attr = to_sensor_dev_attr(devattr); | |
197 | struct adm9240_data *data = adm9240_update_device(dev); | |
198 | return sprintf(buf, "%d\n", data->temp_max[attr->index] * 1000); | |
199 | } | |
200 | ||
201 | static ssize_t set_max(struct device *dev, struct device_attribute *devattr, | |
202 | const char *buf, size_t count) | |
203 | { | |
204 | struct sensor_device_attribute *attr = to_sensor_dev_attr(devattr); | |
205 | struct i2c_client *client = to_i2c_client(dev); | |
206 | struct adm9240_data *data = i2c_get_clientdata(client); | |
207 | long val = simple_strtol(buf, NULL, 10); | |
208 | ||
9a61bf63 | 209 | mutex_lock(&data->update_lock); |
c7461a66 GC |
210 | data->temp_max[attr->index] = TEMP_TO_REG(val); |
211 | i2c_smbus_write_byte_data(client, ADM9240_REG_TEMP_MAX(attr->index), | |
212 | data->temp_max[attr->index]); | |
9a61bf63 | 213 | mutex_unlock(&data->update_lock); |
c7461a66 GC |
214 | return count; |
215 | } | |
216 | ||
40b5cda2 | 217 | static DEVICE_ATTR(temp1_input, S_IRUGO, show_temp, NULL); |
c7461a66 GC |
218 | static SENSOR_DEVICE_ATTR(temp1_max, S_IWUSR | S_IRUGO, |
219 | show_max, set_max, 0); | |
220 | static SENSOR_DEVICE_ATTR(temp1_max_hyst, S_IWUSR | S_IRUGO, | |
221 | show_max, set_max, 1); | |
40b5cda2 GC |
222 | |
223 | /* voltage */ | |
c7461a66 GC |
224 | static ssize_t show_in(struct device *dev, struct device_attribute *devattr, |
225 | char *buf) | |
40b5cda2 | 226 | { |
c7461a66 | 227 | struct sensor_device_attribute *attr = to_sensor_dev_attr(devattr); |
40b5cda2 | 228 | struct adm9240_data *data = adm9240_update_device(dev); |
c7461a66 GC |
229 | return sprintf(buf, "%d\n", IN_FROM_REG(data->in[attr->index], |
230 | attr->index)); | |
40b5cda2 GC |
231 | } |
232 | ||
e415e48b JD |
233 | static ssize_t show_in_min(struct device *dev, |
234 | struct device_attribute *devattr, char *buf) | |
40b5cda2 | 235 | { |
c7461a66 | 236 | struct sensor_device_attribute *attr = to_sensor_dev_attr(devattr); |
40b5cda2 | 237 | struct adm9240_data *data = adm9240_update_device(dev); |
c7461a66 GC |
238 | return sprintf(buf, "%d\n", IN_FROM_REG(data->in_min[attr->index], |
239 | attr->index)); | |
40b5cda2 GC |
240 | } |
241 | ||
e415e48b JD |
242 | static ssize_t show_in_max(struct device *dev, |
243 | struct device_attribute *devattr, char *buf) | |
40b5cda2 | 244 | { |
c7461a66 | 245 | struct sensor_device_attribute *attr = to_sensor_dev_attr(devattr); |
40b5cda2 | 246 | struct adm9240_data *data = adm9240_update_device(dev); |
c7461a66 GC |
247 | return sprintf(buf, "%d\n", IN_FROM_REG(data->in_max[attr->index], |
248 | attr->index)); | |
40b5cda2 GC |
249 | } |
250 | ||
e415e48b JD |
251 | static ssize_t set_in_min(struct device *dev, |
252 | struct device_attribute *devattr, | |
c7461a66 | 253 | const char *buf, size_t count) |
40b5cda2 | 254 | { |
c7461a66 | 255 | struct sensor_device_attribute *attr = to_sensor_dev_attr(devattr); |
40b5cda2 GC |
256 | struct i2c_client *client = to_i2c_client(dev); |
257 | struct adm9240_data *data = i2c_get_clientdata(client); | |
258 | unsigned long val = simple_strtoul(buf, NULL, 10); | |
259 | ||
9a61bf63 | 260 | mutex_lock(&data->update_lock); |
c7461a66 GC |
261 | data->in_min[attr->index] = IN_TO_REG(val, attr->index); |
262 | i2c_smbus_write_byte_data(client, ADM9240_REG_IN_MIN(attr->index), | |
263 | data->in_min[attr->index]); | |
9a61bf63 | 264 | mutex_unlock(&data->update_lock); |
40b5cda2 GC |
265 | return count; |
266 | } | |
267 | ||
e415e48b JD |
268 | static ssize_t set_in_max(struct device *dev, |
269 | struct device_attribute *devattr, | |
c7461a66 | 270 | const char *buf, size_t count) |
40b5cda2 | 271 | { |
c7461a66 | 272 | struct sensor_device_attribute *attr = to_sensor_dev_attr(devattr); |
40b5cda2 GC |
273 | struct i2c_client *client = to_i2c_client(dev); |
274 | struct adm9240_data *data = i2c_get_clientdata(client); | |
275 | unsigned long val = simple_strtoul(buf, NULL, 10); | |
276 | ||
9a61bf63 | 277 | mutex_lock(&data->update_lock); |
c7461a66 GC |
278 | data->in_max[attr->index] = IN_TO_REG(val, attr->index); |
279 | i2c_smbus_write_byte_data(client, ADM9240_REG_IN_MAX(attr->index), | |
280 | data->in_max[attr->index]); | |
9a61bf63 | 281 | mutex_unlock(&data->update_lock); |
40b5cda2 GC |
282 | return count; |
283 | } | |
284 | ||
c7461a66 GC |
285 | #define vin(nr) \ |
286 | static SENSOR_DEVICE_ATTR(in##nr##_input, S_IRUGO, \ | |
287 | show_in, NULL, nr); \ | |
288 | static SENSOR_DEVICE_ATTR(in##nr##_min, S_IRUGO | S_IWUSR, \ | |
289 | show_in_min, set_in_min, nr); \ | |
290 | static SENSOR_DEVICE_ATTR(in##nr##_max, S_IRUGO | S_IWUSR, \ | |
291 | show_in_max, set_in_max, nr); | |
292 | ||
293 | vin(0); | |
294 | vin(1); | |
295 | vin(2); | |
296 | vin(3); | |
297 | vin(4); | |
298 | vin(5); | |
40b5cda2 GC |
299 | |
300 | /* fans */ | |
c7461a66 GC |
301 | static ssize_t show_fan(struct device *dev, |
302 | struct device_attribute *devattr, char *buf) | |
40b5cda2 | 303 | { |
c7461a66 | 304 | struct sensor_device_attribute *attr = to_sensor_dev_attr(devattr); |
40b5cda2 | 305 | struct adm9240_data *data = adm9240_update_device(dev); |
c7461a66 GC |
306 | return sprintf(buf, "%d\n", FAN_FROM_REG(data->fan[attr->index], |
307 | 1 << data->fan_div[attr->index])); | |
40b5cda2 GC |
308 | } |
309 | ||
c7461a66 GC |
310 | static ssize_t show_fan_min(struct device *dev, |
311 | struct device_attribute *devattr, char *buf) | |
40b5cda2 | 312 | { |
c7461a66 | 313 | struct sensor_device_attribute *attr = to_sensor_dev_attr(devattr); |
40b5cda2 | 314 | struct adm9240_data *data = adm9240_update_device(dev); |
c7461a66 GC |
315 | return sprintf(buf, "%d\n", FAN_FROM_REG(data->fan_min[attr->index], |
316 | 1 << data->fan_div[attr->index])); | |
40b5cda2 GC |
317 | } |
318 | ||
c7461a66 GC |
319 | static ssize_t show_fan_div(struct device *dev, |
320 | struct device_attribute *devattr, char *buf) | |
40b5cda2 | 321 | { |
c7461a66 | 322 | struct sensor_device_attribute *attr = to_sensor_dev_attr(devattr); |
40b5cda2 | 323 | struct adm9240_data *data = adm9240_update_device(dev); |
c7461a66 | 324 | return sprintf(buf, "%d\n", 1 << data->fan_div[attr->index]); |
40b5cda2 GC |
325 | } |
326 | ||
327 | /* write new fan div, callers must hold data->update_lock */ | |
328 | static void adm9240_write_fan_div(struct i2c_client *client, int nr, | |
329 | u8 fan_div) | |
330 | { | |
331 | u8 reg, old, shift = (nr + 2) * 2; | |
332 | ||
205cf13e | 333 | reg = i2c_smbus_read_byte_data(client, ADM9240_REG_VID_FAN_DIV); |
40b5cda2 GC |
334 | old = (reg >> shift) & 3; |
335 | reg &= ~(3 << shift); | |
336 | reg |= (fan_div << shift); | |
205cf13e | 337 | i2c_smbus_write_byte_data(client, ADM9240_REG_VID_FAN_DIV, reg); |
40b5cda2 GC |
338 | dev_dbg(&client->dev, "fan%d clock divider changed from %u " |
339 | "to %u\n", nr + 1, 1 << old, 1 << fan_div); | |
340 | } | |
341 | ||
e415e48b | 342 | /* |
40b5cda2 GC |
343 | * set fan speed low limit: |
344 | * | |
345 | * - value is zero: disable fan speed low limit alarm | |
346 | * | |
347 | * - value is below fan speed measurement range: enable fan speed low | |
348 | * limit alarm to be asserted while fan speed too slow to measure | |
349 | * | |
350 | * - otherwise: select fan clock divider to suit fan speed low limit, | |
351 | * measurement code may adjust registers to ensure fan speed reading | |
352 | */ | |
c7461a66 GC |
353 | static ssize_t set_fan_min(struct device *dev, |
354 | struct device_attribute *devattr, | |
355 | const char *buf, size_t count) | |
40b5cda2 | 356 | { |
c7461a66 | 357 | struct sensor_device_attribute *attr = to_sensor_dev_attr(devattr); |
40b5cda2 GC |
358 | struct i2c_client *client = to_i2c_client(dev); |
359 | struct adm9240_data *data = i2c_get_clientdata(client); | |
360 | unsigned long val = simple_strtoul(buf, NULL, 10); | |
c7461a66 | 361 | int nr = attr->index; |
40b5cda2 GC |
362 | u8 new_div; |
363 | ||
9a61bf63 | 364 | mutex_lock(&data->update_lock); |
40b5cda2 GC |
365 | |
366 | if (!val) { | |
367 | data->fan_min[nr] = 255; | |
368 | new_div = data->fan_div[nr]; | |
369 | ||
370 | dev_dbg(&client->dev, "fan%u low limit set disabled\n", | |
371 | nr + 1); | |
372 | ||
373 | } else if (val < 1350000 / (8 * 254)) { | |
374 | new_div = 3; | |
375 | data->fan_min[nr] = 254; | |
376 | ||
377 | dev_dbg(&client->dev, "fan%u low limit set minimum %u\n", | |
378 | nr + 1, FAN_FROM_REG(254, 1 << new_div)); | |
379 | ||
380 | } else { | |
381 | unsigned int new_min = 1350000 / val; | |
382 | ||
383 | new_div = 0; | |
384 | while (new_min > 192 && new_div < 3) { | |
385 | new_div++; | |
386 | new_min /= 2; | |
387 | } | |
388 | if (!new_min) /* keep > 0 */ | |
389 | new_min++; | |
390 | ||
391 | data->fan_min[nr] = new_min; | |
392 | ||
393 | dev_dbg(&client->dev, "fan%u low limit set fan speed %u\n", | |
394 | nr + 1, FAN_FROM_REG(new_min, 1 << new_div)); | |
395 | } | |
396 | ||
397 | if (new_div != data->fan_div[nr]) { | |
398 | data->fan_div[nr] = new_div; | |
399 | adm9240_write_fan_div(client, nr, new_div); | |
400 | } | |
205cf13e | 401 | i2c_smbus_write_byte_data(client, ADM9240_REG_FAN_MIN(nr), |
40b5cda2 GC |
402 | data->fan_min[nr]); |
403 | ||
9a61bf63 | 404 | mutex_unlock(&data->update_lock); |
40b5cda2 GC |
405 | return count; |
406 | } | |
407 | ||
c7461a66 GC |
408 | #define fan(nr) \ |
409 | static SENSOR_DEVICE_ATTR(fan##nr##_input, S_IRUGO, \ | |
410 | show_fan, NULL, nr - 1); \ | |
411 | static SENSOR_DEVICE_ATTR(fan##nr##_div, S_IRUGO, \ | |
412 | show_fan_div, NULL, nr - 1); \ | |
413 | static SENSOR_DEVICE_ATTR(fan##nr##_min, S_IRUGO | S_IWUSR, \ | |
414 | show_fan_min, set_fan_min, nr - 1); | |
415 | ||
416 | fan(1); | |
417 | fan(2); | |
40b5cda2 GC |
418 | |
419 | /* alarms */ | |
e415e48b JD |
420 | static ssize_t show_alarms(struct device *dev, |
421 | struct device_attribute *attr, char *buf) | |
40b5cda2 GC |
422 | { |
423 | struct adm9240_data *data = adm9240_update_device(dev); | |
424 | return sprintf(buf, "%u\n", data->alarms); | |
425 | } | |
426 | static DEVICE_ATTR(alarms, S_IRUGO, show_alarms, NULL); | |
427 | ||
360f9452 JD |
428 | static ssize_t show_alarm(struct device *dev, |
429 | struct device_attribute *attr, char *buf) | |
430 | { | |
431 | int bitnr = to_sensor_dev_attr(attr)->index; | |
432 | struct adm9240_data *data = adm9240_update_device(dev); | |
433 | return sprintf(buf, "%u\n", (data->alarms >> bitnr) & 1); | |
434 | } | |
435 | static SENSOR_DEVICE_ATTR(in0_alarm, S_IRUGO, show_alarm, NULL, 0); | |
436 | static SENSOR_DEVICE_ATTR(in1_alarm, S_IRUGO, show_alarm, NULL, 1); | |
437 | static SENSOR_DEVICE_ATTR(in2_alarm, S_IRUGO, show_alarm, NULL, 2); | |
438 | static SENSOR_DEVICE_ATTR(in3_alarm, S_IRUGO, show_alarm, NULL, 3); | |
439 | static SENSOR_DEVICE_ATTR(in4_alarm, S_IRUGO, show_alarm, NULL, 8); | |
440 | static SENSOR_DEVICE_ATTR(in5_alarm, S_IRUGO, show_alarm, NULL, 9); | |
441 | static SENSOR_DEVICE_ATTR(temp1_alarm, S_IRUGO, show_alarm, NULL, 4); | |
442 | static SENSOR_DEVICE_ATTR(fan1_alarm, S_IRUGO, show_alarm, NULL, 6); | |
443 | static SENSOR_DEVICE_ATTR(fan2_alarm, S_IRUGO, show_alarm, NULL, 7); | |
444 | ||
40b5cda2 | 445 | /* vid */ |
e415e48b JD |
446 | static ssize_t show_vid(struct device *dev, |
447 | struct device_attribute *attr, char *buf) | |
40b5cda2 GC |
448 | { |
449 | struct adm9240_data *data = adm9240_update_device(dev); | |
450 | return sprintf(buf, "%d\n", vid_from_reg(data->vid, data->vrm)); | |
451 | } | |
452 | static DEVICE_ATTR(cpu0_vid, S_IRUGO, show_vid, NULL); | |
453 | ||
454 | /* analog output */ | |
e415e48b JD |
455 | static ssize_t show_aout(struct device *dev, |
456 | struct device_attribute *attr, char *buf) | |
40b5cda2 GC |
457 | { |
458 | struct adm9240_data *data = adm9240_update_device(dev); | |
459 | return sprintf(buf, "%d\n", AOUT_FROM_REG(data->aout)); | |
460 | } | |
461 | ||
e415e48b JD |
462 | static ssize_t set_aout(struct device *dev, |
463 | struct device_attribute *attr, | |
464 | const char *buf, size_t count) | |
40b5cda2 GC |
465 | { |
466 | struct i2c_client *client = to_i2c_client(dev); | |
467 | struct adm9240_data *data = i2c_get_clientdata(client); | |
468 | unsigned long val = simple_strtol(buf, NULL, 10); | |
469 | ||
9a61bf63 | 470 | mutex_lock(&data->update_lock); |
40b5cda2 | 471 | data->aout = AOUT_TO_REG(val); |
205cf13e | 472 | i2c_smbus_write_byte_data(client, ADM9240_REG_ANALOG_OUT, data->aout); |
9a61bf63 | 473 | mutex_unlock(&data->update_lock); |
40b5cda2 GC |
474 | return count; |
475 | } | |
476 | static DEVICE_ATTR(aout_output, S_IRUGO | S_IWUSR, show_aout, set_aout); | |
477 | ||
478 | /* chassis_clear */ | |
e415e48b JD |
479 | static ssize_t chassis_clear(struct device *dev, |
480 | struct device_attribute *attr, | |
481 | const char *buf, size_t count) | |
40b5cda2 GC |
482 | { |
483 | struct i2c_client *client = to_i2c_client(dev); | |
484 | unsigned long val = simple_strtol(buf, NULL, 10); | |
485 | ||
486 | if (val == 1) { | |
205cf13e GC |
487 | i2c_smbus_write_byte_data(client, |
488 | ADM9240_REG_CHASSIS_CLEAR, 0x80); | |
40b5cda2 GC |
489 | dev_dbg(&client->dev, "chassis intrusion latch cleared\n"); |
490 | } | |
491 | return count; | |
492 | } | |
493 | static DEVICE_ATTR(chassis_clear, S_IWUSR, NULL, chassis_clear); | |
494 | ||
681c6f7a MH |
495 | static struct attribute *adm9240_attributes[] = { |
496 | &sensor_dev_attr_in0_input.dev_attr.attr, | |
497 | &sensor_dev_attr_in0_min.dev_attr.attr, | |
498 | &sensor_dev_attr_in0_max.dev_attr.attr, | |
360f9452 | 499 | &sensor_dev_attr_in0_alarm.dev_attr.attr, |
681c6f7a MH |
500 | &sensor_dev_attr_in1_input.dev_attr.attr, |
501 | &sensor_dev_attr_in1_min.dev_attr.attr, | |
502 | &sensor_dev_attr_in1_max.dev_attr.attr, | |
360f9452 | 503 | &sensor_dev_attr_in1_alarm.dev_attr.attr, |
681c6f7a MH |
504 | &sensor_dev_attr_in2_input.dev_attr.attr, |
505 | &sensor_dev_attr_in2_min.dev_attr.attr, | |
506 | &sensor_dev_attr_in2_max.dev_attr.attr, | |
360f9452 | 507 | &sensor_dev_attr_in2_alarm.dev_attr.attr, |
681c6f7a MH |
508 | &sensor_dev_attr_in3_input.dev_attr.attr, |
509 | &sensor_dev_attr_in3_min.dev_attr.attr, | |
510 | &sensor_dev_attr_in3_max.dev_attr.attr, | |
360f9452 | 511 | &sensor_dev_attr_in3_alarm.dev_attr.attr, |
681c6f7a MH |
512 | &sensor_dev_attr_in4_input.dev_attr.attr, |
513 | &sensor_dev_attr_in4_min.dev_attr.attr, | |
514 | &sensor_dev_attr_in4_max.dev_attr.attr, | |
360f9452 | 515 | &sensor_dev_attr_in4_alarm.dev_attr.attr, |
681c6f7a MH |
516 | &sensor_dev_attr_in5_input.dev_attr.attr, |
517 | &sensor_dev_attr_in5_min.dev_attr.attr, | |
518 | &sensor_dev_attr_in5_max.dev_attr.attr, | |
360f9452 | 519 | &sensor_dev_attr_in5_alarm.dev_attr.attr, |
681c6f7a MH |
520 | &dev_attr_temp1_input.attr, |
521 | &sensor_dev_attr_temp1_max.dev_attr.attr, | |
522 | &sensor_dev_attr_temp1_max_hyst.dev_attr.attr, | |
360f9452 | 523 | &sensor_dev_attr_temp1_alarm.dev_attr.attr, |
681c6f7a MH |
524 | &sensor_dev_attr_fan1_input.dev_attr.attr, |
525 | &sensor_dev_attr_fan1_div.dev_attr.attr, | |
526 | &sensor_dev_attr_fan1_min.dev_attr.attr, | |
360f9452 | 527 | &sensor_dev_attr_fan1_alarm.dev_attr.attr, |
681c6f7a MH |
528 | &sensor_dev_attr_fan2_input.dev_attr.attr, |
529 | &sensor_dev_attr_fan2_div.dev_attr.attr, | |
530 | &sensor_dev_attr_fan2_min.dev_attr.attr, | |
360f9452 | 531 | &sensor_dev_attr_fan2_alarm.dev_attr.attr, |
681c6f7a MH |
532 | &dev_attr_alarms.attr, |
533 | &dev_attr_aout_output.attr, | |
534 | &dev_attr_chassis_clear.attr, | |
535 | &dev_attr_cpu0_vid.attr, | |
536 | NULL | |
537 | }; | |
538 | ||
539 | static const struct attribute_group adm9240_group = { | |
540 | .attrs = adm9240_attributes, | |
541 | }; | |
542 | ||
40b5cda2 GC |
543 | |
544 | /*** sensor chip detect and driver install ***/ | |
545 | ||
7fae8283 | 546 | /* Return 0 if detection is successful, -ENODEV otherwise */ |
310ec792 | 547 | static int adm9240_detect(struct i2c_client *new_client, |
7fae8283 | 548 | struct i2c_board_info *info) |
40b5cda2 | 549 | { |
7fae8283 | 550 | struct i2c_adapter *adapter = new_client->adapter; |
40b5cda2 | 551 | const char *name = ""; |
7fae8283 | 552 | int address = new_client->addr; |
40b5cda2 GC |
553 | u8 man_id, die_rev; |
554 | ||
555 | if (!i2c_check_functionality(adapter, I2C_FUNC_SMBUS_BYTE_DATA)) | |
7fae8283 | 556 | return -ENODEV; |
40b5cda2 | 557 | |
52df6440 JD |
558 | /* verify chip: reg address should match i2c address */ |
559 | if (i2c_smbus_read_byte_data(new_client, ADM9240_REG_I2C_ADDR) | |
560 | != address) { | |
561 | dev_err(&adapter->dev, "detect fail: address match, 0x%02x\n", | |
562 | address); | |
563 | return -ENODEV; | |
40b5cda2 GC |
564 | } |
565 | ||
52df6440 JD |
566 | /* check known chip manufacturer */ |
567 | man_id = i2c_smbus_read_byte_data(new_client, ADM9240_REG_MAN_ID); | |
568 | if (man_id == 0x23) { | |
40b5cda2 | 569 | name = "adm9240"; |
52df6440 | 570 | } else if (man_id == 0xda) { |
40b5cda2 | 571 | name = "ds1780"; |
52df6440 | 572 | } else if (man_id == 0x01) { |
40b5cda2 | 573 | name = "lm81"; |
52df6440 JD |
574 | } else { |
575 | dev_err(&adapter->dev, "detect fail: unknown manuf, 0x%02x\n", | |
576 | man_id); | |
577 | return -ENODEV; | |
40b5cda2 | 578 | } |
52df6440 JD |
579 | |
580 | /* successful detect, print chip info */ | |
581 | die_rev = i2c_smbus_read_byte_data(new_client, ADM9240_REG_DIE_REV); | |
582 | dev_info(&adapter->dev, "found %s revision %u\n", | |
583 | man_id == 0x23 ? "ADM9240" : | |
584 | man_id == 0xda ? "DS1780" : "LM81", die_rev); | |
585 | ||
7fae8283 | 586 | strlcpy(info->type, name, I2C_NAME_SIZE); |
40b5cda2 | 587 | |
7fae8283 JD |
588 | return 0; |
589 | } | |
40b5cda2 | 590 | |
7fae8283 JD |
591 | static int adm9240_probe(struct i2c_client *new_client, |
592 | const struct i2c_device_id *id) | |
593 | { | |
594 | struct adm9240_data *data; | |
595 | int err; | |
596 | ||
597 | data = kzalloc(sizeof(*data), GFP_KERNEL); | |
598 | if (!data) { | |
599 | err = -ENOMEM; | |
600 | goto exit; | |
601 | } | |
602 | ||
603 | i2c_set_clientdata(new_client, data); | |
604 | mutex_init(&data->update_lock); | |
40b5cda2 GC |
605 | |
606 | adm9240_init_client(new_client); | |
607 | ||
608 | /* populate sysfs filesystem */ | |
681c6f7a | 609 | if ((err = sysfs_create_group(&new_client->dev.kobj, &adm9240_group))) |
7fae8283 | 610 | goto exit_free; |
681c6f7a | 611 | |
1beeffe4 TJ |
612 | data->hwmon_dev = hwmon_device_register(&new_client->dev); |
613 | if (IS_ERR(data->hwmon_dev)) { | |
614 | err = PTR_ERR(data->hwmon_dev); | |
681c6f7a | 615 | goto exit_remove; |
943b0830 MH |
616 | } |
617 | ||
40b5cda2 | 618 | return 0; |
943b0830 | 619 | |
681c6f7a MH |
620 | exit_remove: |
621 | sysfs_remove_group(&new_client->dev.kobj, &adm9240_group); | |
40b5cda2 | 622 | exit_free: |
1f57ff89 | 623 | kfree(data); |
40b5cda2 GC |
624 | exit: |
625 | return err; | |
626 | } | |
627 | ||
7fae8283 | 628 | static int adm9240_remove(struct i2c_client *client) |
40b5cda2 | 629 | { |
943b0830 | 630 | struct adm9240_data *data = i2c_get_clientdata(client); |
40b5cda2 | 631 | |
1beeffe4 | 632 | hwmon_device_unregister(data->hwmon_dev); |
681c6f7a | 633 | sysfs_remove_group(&client->dev.kobj, &adm9240_group); |
943b0830 | 634 | |
943b0830 | 635 | kfree(data); |
40b5cda2 GC |
636 | return 0; |
637 | } | |
638 | ||
639 | static void adm9240_init_client(struct i2c_client *client) | |
640 | { | |
641 | struct adm9240_data *data = i2c_get_clientdata(client); | |
205cf13e GC |
642 | u8 conf = i2c_smbus_read_byte_data(client, ADM9240_REG_CONFIG); |
643 | u8 mode = i2c_smbus_read_byte_data(client, ADM9240_REG_TEMP_CONF) & 3; | |
40b5cda2 | 644 | |
303760b4 | 645 | data->vrm = vid_which_vrm(); /* need this to report vid as mV */ |
40b5cda2 | 646 | |
8e8f9289 GC |
647 | dev_info(&client->dev, "Using VRM: %d.%d\n", data->vrm / 10, |
648 | data->vrm % 10); | |
649 | ||
40b5cda2 GC |
650 | if (conf & 1) { /* measurement cycle running: report state */ |
651 | ||
652 | dev_info(&client->dev, "status: config 0x%02x mode %u\n", | |
653 | conf, mode); | |
654 | ||
655 | } else { /* cold start: open limits before starting chip */ | |
656 | int i; | |
657 | ||
658 | for (i = 0; i < 6; i++) | |
659 | { | |
205cf13e | 660 | i2c_smbus_write_byte_data(client, |
40b5cda2 | 661 | ADM9240_REG_IN_MIN(i), 0); |
205cf13e | 662 | i2c_smbus_write_byte_data(client, |
40b5cda2 GC |
663 | ADM9240_REG_IN_MAX(i), 255); |
664 | } | |
205cf13e GC |
665 | i2c_smbus_write_byte_data(client, |
666 | ADM9240_REG_FAN_MIN(0), 255); | |
667 | i2c_smbus_write_byte_data(client, | |
668 | ADM9240_REG_FAN_MIN(1), 255); | |
669 | i2c_smbus_write_byte_data(client, | |
c7461a66 | 670 | ADM9240_REG_TEMP_MAX(0), 127); |
205cf13e | 671 | i2c_smbus_write_byte_data(client, |
c7461a66 | 672 | ADM9240_REG_TEMP_MAX(1), 127); |
40b5cda2 GC |
673 | |
674 | /* start measurement cycle */ | |
205cf13e | 675 | i2c_smbus_write_byte_data(client, ADM9240_REG_CONFIG, 1); |
40b5cda2 GC |
676 | |
677 | dev_info(&client->dev, "cold start: config was 0x%02x " | |
678 | "mode %u\n", conf, mode); | |
679 | } | |
680 | } | |
681 | ||
682 | static struct adm9240_data *adm9240_update_device(struct device *dev) | |
683 | { | |
684 | struct i2c_client *client = to_i2c_client(dev); | |
685 | struct adm9240_data *data = i2c_get_clientdata(client); | |
686 | int i; | |
687 | ||
9a61bf63 | 688 | mutex_lock(&data->update_lock); |
40b5cda2 GC |
689 | |
690 | /* minimum measurement cycle: 1.75 seconds */ | |
691 | if (time_after(jiffies, data->last_updated_measure + (HZ * 7 / 4)) | |
692 | || !data->valid) { | |
693 | ||
694 | for (i = 0; i < 6; i++) /* read voltages */ | |
695 | { | |
205cf13e | 696 | data->in[i] = i2c_smbus_read_byte_data(client, |
40b5cda2 GC |
697 | ADM9240_REG_IN(i)); |
698 | } | |
205cf13e | 699 | data->alarms = i2c_smbus_read_byte_data(client, |
40b5cda2 | 700 | ADM9240_REG_INT(0)) | |
205cf13e | 701 | i2c_smbus_read_byte_data(client, |
40b5cda2 GC |
702 | ADM9240_REG_INT(1)) << 8; |
703 | ||
704 | /* read temperature: assume temperature changes less than | |
705 | * 0.5'C per two measurement cycles thus ignore possible | |
706 | * but unlikely aliasing error on lsb reading. --Grant */ | |
205cf13e | 707 | data->temp = ((i2c_smbus_read_byte_data(client, |
40b5cda2 | 708 | ADM9240_REG_TEMP) << 8) | |
205cf13e | 709 | i2c_smbus_read_byte_data(client, |
40b5cda2 GC |
710 | ADM9240_REG_TEMP_CONF)) / 128; |
711 | ||
712 | for (i = 0; i < 2; i++) /* read fans */ | |
713 | { | |
205cf13e | 714 | data->fan[i] = i2c_smbus_read_byte_data(client, |
40b5cda2 GC |
715 | ADM9240_REG_FAN(i)); |
716 | ||
717 | /* adjust fan clock divider on overflow */ | |
718 | if (data->valid && data->fan[i] == 255 && | |
719 | data->fan_div[i] < 3) { | |
720 | ||
721 | adm9240_write_fan_div(client, i, | |
722 | ++data->fan_div[i]); | |
723 | ||
724 | /* adjust fan_min if active, but not to 0 */ | |
725 | if (data->fan_min[i] < 255 && | |
726 | data->fan_min[i] >= 2) | |
727 | data->fan_min[i] /= 2; | |
728 | } | |
729 | } | |
730 | data->last_updated_measure = jiffies; | |
731 | } | |
732 | ||
733 | /* minimum config reading cycle: 300 seconds */ | |
734 | if (time_after(jiffies, data->last_updated_config + (HZ * 300)) | |
735 | || !data->valid) { | |
736 | ||
737 | for (i = 0; i < 6; i++) | |
738 | { | |
205cf13e | 739 | data->in_min[i] = i2c_smbus_read_byte_data(client, |
40b5cda2 | 740 | ADM9240_REG_IN_MIN(i)); |
205cf13e | 741 | data->in_max[i] = i2c_smbus_read_byte_data(client, |
40b5cda2 GC |
742 | ADM9240_REG_IN_MAX(i)); |
743 | } | |
744 | for (i = 0; i < 2; i++) | |
745 | { | |
205cf13e | 746 | data->fan_min[i] = i2c_smbus_read_byte_data(client, |
40b5cda2 GC |
747 | ADM9240_REG_FAN_MIN(i)); |
748 | } | |
c7461a66 GC |
749 | data->temp_max[0] = i2c_smbus_read_byte_data(client, |
750 | ADM9240_REG_TEMP_MAX(0)); | |
751 | data->temp_max[1] = i2c_smbus_read_byte_data(client, | |
752 | ADM9240_REG_TEMP_MAX(1)); | |
40b5cda2 GC |
753 | |
754 | /* read fan divs and 5-bit VID */ | |
205cf13e | 755 | i = i2c_smbus_read_byte_data(client, ADM9240_REG_VID_FAN_DIV); |
40b5cda2 GC |
756 | data->fan_div[0] = (i >> 4) & 3; |
757 | data->fan_div[1] = (i >> 6) & 3; | |
758 | data->vid = i & 0x0f; | |
205cf13e | 759 | data->vid |= (i2c_smbus_read_byte_data(client, |
40b5cda2 GC |
760 | ADM9240_REG_VID4) & 1) << 4; |
761 | /* read analog out */ | |
205cf13e | 762 | data->aout = i2c_smbus_read_byte_data(client, |
40b5cda2 GC |
763 | ADM9240_REG_ANALOG_OUT); |
764 | ||
765 | data->last_updated_config = jiffies; | |
766 | data->valid = 1; | |
767 | } | |
9a61bf63 | 768 | mutex_unlock(&data->update_lock); |
40b5cda2 GC |
769 | return data; |
770 | } | |
771 | ||
772 | static int __init sensors_adm9240_init(void) | |
773 | { | |
774 | return i2c_add_driver(&adm9240_driver); | |
775 | } | |
776 | ||
777 | static void __exit sensors_adm9240_exit(void) | |
778 | { | |
779 | i2c_del_driver(&adm9240_driver); | |
780 | } | |
781 | ||
782 | MODULE_AUTHOR("Michiel Rook <michiel@grendelproject.nl>, " | |
2ca7b961 | 783 | "Grant Coady <gcoady.lk@gmail.com> and others"); |
40b5cda2 GC |
784 | MODULE_DESCRIPTION("ADM9240/DS1780/LM81 driver"); |
785 | MODULE_LICENSE("GPL"); | |
786 | ||
787 | module_init(sensors_adm9240_init); | |
788 | module_exit(sensors_adm9240_exit); | |
789 |