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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 | ||
40b5cda2 | 58 | /* Insmod parameters */ |
f4b50261 | 59 | I2C_CLIENT_INSMOD_3(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 | { | |
101 | return SENSORS_LIMIT(SCALE(val, 192, nom_mv[n]), 0, 255); | |
102 | } | |
103 | ||
104 | /* temperature range: -40..125, 127 disables temperature alarm */ | |
105 | static inline s8 TEMP_TO_REG(long val) | |
106 | { | |
107 | return SENSORS_LIMIT(SCALE(val, 1, 1000), -40, 127); | |
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 | { | |
125 | return SENSORS_LIMIT(SCALE(val, 255, 1250), 0, 255); | |
126 | } | |
127 | ||
128 | static inline unsigned int AOUT_FROM_REG(u8 reg) | |
129 | { | |
130 | return SCALE(reg, 1250, 255); | |
131 | } | |
132 | ||
133 | static int adm9240_attach_adapter(struct i2c_adapter *adapter); | |
134 | static int adm9240_detect(struct i2c_adapter *adapter, int address, int kind); | |
135 | static void adm9240_init_client(struct i2c_client *client); | |
136 | static int adm9240_detach_client(struct i2c_client *client); | |
137 | static struct adm9240_data *adm9240_update_device(struct device *dev); | |
138 | ||
139 | /* driver data */ | |
140 | static struct i2c_driver adm9240_driver = { | |
cdaf7934 | 141 | .driver = { |
cdaf7934 LR |
142 | .name = "adm9240", |
143 | }, | |
40b5cda2 GC |
144 | .attach_adapter = adm9240_attach_adapter, |
145 | .detach_client = adm9240_detach_client, | |
146 | }; | |
147 | ||
148 | /* per client data */ | |
149 | struct adm9240_data { | |
150 | enum chips type; | |
151 | struct i2c_client client; | |
1beeffe4 | 152 | struct device *hwmon_dev; |
9a61bf63 | 153 | struct mutex update_lock; |
40b5cda2 GC |
154 | char valid; |
155 | unsigned long last_updated_measure; | |
156 | unsigned long last_updated_config; | |
157 | ||
158 | u8 in[6]; /* ro in0_input */ | |
159 | u8 in_max[6]; /* rw in0_max */ | |
160 | u8 in_min[6]; /* rw in0_min */ | |
161 | u8 fan[2]; /* ro fan1_input */ | |
162 | u8 fan_min[2]; /* rw fan1_min */ | |
163 | u8 fan_div[2]; /* rw fan1_div, read-only accessor */ | |
164 | s16 temp; /* ro temp1_input, 9-bit sign-extended */ | |
c7461a66 | 165 | s8 temp_max[2]; /* rw 0 -> temp_max, 1 -> temp_max_hyst */ |
40b5cda2 | 166 | u16 alarms; /* ro alarms */ |
8e8f9289 | 167 | u8 aout; /* rw aout_output */ |
40b5cda2 GC |
168 | u8 vid; /* ro vid */ |
169 | u8 vrm; /* -- vrm set on startup, no accessor */ | |
170 | }; | |
171 | ||
40b5cda2 GC |
172 | /*** sysfs accessors ***/ |
173 | ||
174 | /* temperature */ | |
c7461a66 GC |
175 | static ssize_t show_temp(struct device *dev, struct device_attribute *dummy, |
176 | char *buf) | |
177 | { | |
178 | struct adm9240_data *data = adm9240_update_device(dev); | |
179 | return sprintf(buf, "%d\n", data->temp * 500); /* 9-bit value */ | |
180 | } | |
181 | ||
182 | static ssize_t show_max(struct device *dev, struct device_attribute *devattr, | |
183 | char *buf) | |
184 | { | |
185 | struct sensor_device_attribute *attr = to_sensor_dev_attr(devattr); | |
186 | struct adm9240_data *data = adm9240_update_device(dev); | |
187 | return sprintf(buf, "%d\n", data->temp_max[attr->index] * 1000); | |
188 | } | |
189 | ||
190 | static ssize_t set_max(struct device *dev, struct device_attribute *devattr, | |
191 | const char *buf, size_t count) | |
192 | { | |
193 | struct sensor_device_attribute *attr = to_sensor_dev_attr(devattr); | |
194 | struct i2c_client *client = to_i2c_client(dev); | |
195 | struct adm9240_data *data = i2c_get_clientdata(client); | |
196 | long val = simple_strtol(buf, NULL, 10); | |
197 | ||
9a61bf63 | 198 | mutex_lock(&data->update_lock); |
c7461a66 GC |
199 | data->temp_max[attr->index] = TEMP_TO_REG(val); |
200 | i2c_smbus_write_byte_data(client, ADM9240_REG_TEMP_MAX(attr->index), | |
201 | data->temp_max[attr->index]); | |
9a61bf63 | 202 | mutex_unlock(&data->update_lock); |
c7461a66 GC |
203 | return count; |
204 | } | |
205 | ||
40b5cda2 | 206 | static DEVICE_ATTR(temp1_input, S_IRUGO, show_temp, NULL); |
c7461a66 GC |
207 | static SENSOR_DEVICE_ATTR(temp1_max, S_IWUSR | S_IRUGO, |
208 | show_max, set_max, 0); | |
209 | static SENSOR_DEVICE_ATTR(temp1_max_hyst, S_IWUSR | S_IRUGO, | |
210 | show_max, set_max, 1); | |
40b5cda2 GC |
211 | |
212 | /* voltage */ | |
c7461a66 GC |
213 | static ssize_t show_in(struct device *dev, struct device_attribute *devattr, |
214 | char *buf) | |
40b5cda2 | 215 | { |
c7461a66 | 216 | struct sensor_device_attribute *attr = to_sensor_dev_attr(devattr); |
40b5cda2 | 217 | struct adm9240_data *data = adm9240_update_device(dev); |
c7461a66 GC |
218 | return sprintf(buf, "%d\n", IN_FROM_REG(data->in[attr->index], |
219 | attr->index)); | |
40b5cda2 GC |
220 | } |
221 | ||
e415e48b JD |
222 | static ssize_t show_in_min(struct device *dev, |
223 | struct device_attribute *devattr, char *buf) | |
40b5cda2 | 224 | { |
c7461a66 | 225 | struct sensor_device_attribute *attr = to_sensor_dev_attr(devattr); |
40b5cda2 | 226 | struct adm9240_data *data = adm9240_update_device(dev); |
c7461a66 GC |
227 | return sprintf(buf, "%d\n", IN_FROM_REG(data->in_min[attr->index], |
228 | attr->index)); | |
40b5cda2 GC |
229 | } |
230 | ||
e415e48b JD |
231 | static ssize_t show_in_max(struct device *dev, |
232 | struct device_attribute *devattr, char *buf) | |
40b5cda2 | 233 | { |
c7461a66 | 234 | struct sensor_device_attribute *attr = to_sensor_dev_attr(devattr); |
40b5cda2 | 235 | struct adm9240_data *data = adm9240_update_device(dev); |
c7461a66 GC |
236 | return sprintf(buf, "%d\n", IN_FROM_REG(data->in_max[attr->index], |
237 | attr->index)); | |
40b5cda2 GC |
238 | } |
239 | ||
e415e48b JD |
240 | static ssize_t set_in_min(struct device *dev, |
241 | struct device_attribute *devattr, | |
c7461a66 | 242 | const char *buf, size_t count) |
40b5cda2 | 243 | { |
c7461a66 | 244 | struct sensor_device_attribute *attr = to_sensor_dev_attr(devattr); |
40b5cda2 GC |
245 | struct i2c_client *client = to_i2c_client(dev); |
246 | struct adm9240_data *data = i2c_get_clientdata(client); | |
247 | unsigned long val = simple_strtoul(buf, NULL, 10); | |
248 | ||
9a61bf63 | 249 | mutex_lock(&data->update_lock); |
c7461a66 GC |
250 | data->in_min[attr->index] = IN_TO_REG(val, attr->index); |
251 | i2c_smbus_write_byte_data(client, ADM9240_REG_IN_MIN(attr->index), | |
252 | data->in_min[attr->index]); | |
9a61bf63 | 253 | mutex_unlock(&data->update_lock); |
40b5cda2 GC |
254 | return count; |
255 | } | |
256 | ||
e415e48b JD |
257 | static ssize_t set_in_max(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); | |
264 | unsigned long val = simple_strtoul(buf, NULL, 10); | |
265 | ||
9a61bf63 | 266 | mutex_lock(&data->update_lock); |
c7461a66 GC |
267 | data->in_max[attr->index] = IN_TO_REG(val, attr->index); |
268 | i2c_smbus_write_byte_data(client, ADM9240_REG_IN_MAX(attr->index), | |
269 | data->in_max[attr->index]); | |
9a61bf63 | 270 | mutex_unlock(&data->update_lock); |
40b5cda2 GC |
271 | return count; |
272 | } | |
273 | ||
c7461a66 GC |
274 | #define vin(nr) \ |
275 | static SENSOR_DEVICE_ATTR(in##nr##_input, S_IRUGO, \ | |
276 | show_in, NULL, nr); \ | |
277 | static SENSOR_DEVICE_ATTR(in##nr##_min, S_IRUGO | S_IWUSR, \ | |
278 | show_in_min, set_in_min, nr); \ | |
279 | static SENSOR_DEVICE_ATTR(in##nr##_max, S_IRUGO | S_IWUSR, \ | |
280 | show_in_max, set_in_max, nr); | |
281 | ||
282 | vin(0); | |
283 | vin(1); | |
284 | vin(2); | |
285 | vin(3); | |
286 | vin(4); | |
287 | vin(5); | |
40b5cda2 GC |
288 | |
289 | /* fans */ | |
c7461a66 GC |
290 | static ssize_t show_fan(struct device *dev, |
291 | struct device_attribute *devattr, char *buf) | |
40b5cda2 | 292 | { |
c7461a66 | 293 | struct sensor_device_attribute *attr = to_sensor_dev_attr(devattr); |
40b5cda2 | 294 | struct adm9240_data *data = adm9240_update_device(dev); |
c7461a66 GC |
295 | return sprintf(buf, "%d\n", FAN_FROM_REG(data->fan[attr->index], |
296 | 1 << data->fan_div[attr->index])); | |
40b5cda2 GC |
297 | } |
298 | ||
c7461a66 GC |
299 | static ssize_t show_fan_min(struct device *dev, |
300 | struct device_attribute *devattr, char *buf) | |
40b5cda2 | 301 | { |
c7461a66 | 302 | struct sensor_device_attribute *attr = to_sensor_dev_attr(devattr); |
40b5cda2 | 303 | struct adm9240_data *data = adm9240_update_device(dev); |
c7461a66 GC |
304 | return sprintf(buf, "%d\n", FAN_FROM_REG(data->fan_min[attr->index], |
305 | 1 << data->fan_div[attr->index])); | |
40b5cda2 GC |
306 | } |
307 | ||
c7461a66 GC |
308 | static ssize_t show_fan_div(struct device *dev, |
309 | struct device_attribute *devattr, char *buf) | |
40b5cda2 | 310 | { |
c7461a66 | 311 | struct sensor_device_attribute *attr = to_sensor_dev_attr(devattr); |
40b5cda2 | 312 | struct adm9240_data *data = adm9240_update_device(dev); |
c7461a66 | 313 | return sprintf(buf, "%d\n", 1 << data->fan_div[attr->index]); |
40b5cda2 GC |
314 | } |
315 | ||
316 | /* write new fan div, callers must hold data->update_lock */ | |
317 | static void adm9240_write_fan_div(struct i2c_client *client, int nr, | |
318 | u8 fan_div) | |
319 | { | |
320 | u8 reg, old, shift = (nr + 2) * 2; | |
321 | ||
205cf13e | 322 | reg = i2c_smbus_read_byte_data(client, ADM9240_REG_VID_FAN_DIV); |
40b5cda2 GC |
323 | old = (reg >> shift) & 3; |
324 | reg &= ~(3 << shift); | |
325 | reg |= (fan_div << shift); | |
205cf13e | 326 | i2c_smbus_write_byte_data(client, ADM9240_REG_VID_FAN_DIV, reg); |
40b5cda2 GC |
327 | dev_dbg(&client->dev, "fan%d clock divider changed from %u " |
328 | "to %u\n", nr + 1, 1 << old, 1 << fan_div); | |
329 | } | |
330 | ||
e415e48b | 331 | /* |
40b5cda2 GC |
332 | * set fan speed low limit: |
333 | * | |
334 | * - value is zero: disable fan speed low limit alarm | |
335 | * | |
336 | * - value is below fan speed measurement range: enable fan speed low | |
337 | * limit alarm to be asserted while fan speed too slow to measure | |
338 | * | |
339 | * - otherwise: select fan clock divider to suit fan speed low limit, | |
340 | * measurement code may adjust registers to ensure fan speed reading | |
341 | */ | |
c7461a66 GC |
342 | static ssize_t set_fan_min(struct device *dev, |
343 | struct device_attribute *devattr, | |
344 | const char *buf, size_t count) | |
40b5cda2 | 345 | { |
c7461a66 | 346 | struct sensor_device_attribute *attr = to_sensor_dev_attr(devattr); |
40b5cda2 GC |
347 | struct i2c_client *client = to_i2c_client(dev); |
348 | struct adm9240_data *data = i2c_get_clientdata(client); | |
349 | unsigned long val = simple_strtoul(buf, NULL, 10); | |
c7461a66 | 350 | int nr = attr->index; |
40b5cda2 GC |
351 | u8 new_div; |
352 | ||
9a61bf63 | 353 | mutex_lock(&data->update_lock); |
40b5cda2 GC |
354 | |
355 | if (!val) { | |
356 | data->fan_min[nr] = 255; | |
357 | new_div = data->fan_div[nr]; | |
358 | ||
359 | dev_dbg(&client->dev, "fan%u low limit set disabled\n", | |
360 | nr + 1); | |
361 | ||
362 | } else if (val < 1350000 / (8 * 254)) { | |
363 | new_div = 3; | |
364 | data->fan_min[nr] = 254; | |
365 | ||
366 | dev_dbg(&client->dev, "fan%u low limit set minimum %u\n", | |
367 | nr + 1, FAN_FROM_REG(254, 1 << new_div)); | |
368 | ||
369 | } else { | |
370 | unsigned int new_min = 1350000 / val; | |
371 | ||
372 | new_div = 0; | |
373 | while (new_min > 192 && new_div < 3) { | |
374 | new_div++; | |
375 | new_min /= 2; | |
376 | } | |
377 | if (!new_min) /* keep > 0 */ | |
378 | new_min++; | |
379 | ||
380 | data->fan_min[nr] = new_min; | |
381 | ||
382 | dev_dbg(&client->dev, "fan%u low limit set fan speed %u\n", | |
383 | nr + 1, FAN_FROM_REG(new_min, 1 << new_div)); | |
384 | } | |
385 | ||
386 | if (new_div != data->fan_div[nr]) { | |
387 | data->fan_div[nr] = new_div; | |
388 | adm9240_write_fan_div(client, nr, new_div); | |
389 | } | |
205cf13e | 390 | i2c_smbus_write_byte_data(client, ADM9240_REG_FAN_MIN(nr), |
40b5cda2 GC |
391 | data->fan_min[nr]); |
392 | ||
9a61bf63 | 393 | mutex_unlock(&data->update_lock); |
40b5cda2 GC |
394 | return count; |
395 | } | |
396 | ||
c7461a66 GC |
397 | #define fan(nr) \ |
398 | static SENSOR_DEVICE_ATTR(fan##nr##_input, S_IRUGO, \ | |
399 | show_fan, NULL, nr - 1); \ | |
400 | static SENSOR_DEVICE_ATTR(fan##nr##_div, S_IRUGO, \ | |
401 | show_fan_div, NULL, nr - 1); \ | |
402 | static SENSOR_DEVICE_ATTR(fan##nr##_min, S_IRUGO | S_IWUSR, \ | |
403 | show_fan_min, set_fan_min, nr - 1); | |
404 | ||
405 | fan(1); | |
406 | fan(2); | |
40b5cda2 GC |
407 | |
408 | /* alarms */ | |
e415e48b JD |
409 | static ssize_t show_alarms(struct device *dev, |
410 | struct device_attribute *attr, char *buf) | |
40b5cda2 GC |
411 | { |
412 | struct adm9240_data *data = adm9240_update_device(dev); | |
413 | return sprintf(buf, "%u\n", data->alarms); | |
414 | } | |
415 | static DEVICE_ATTR(alarms, S_IRUGO, show_alarms, NULL); | |
416 | ||
360f9452 JD |
417 | static ssize_t show_alarm(struct device *dev, |
418 | struct device_attribute *attr, char *buf) | |
419 | { | |
420 | int bitnr = to_sensor_dev_attr(attr)->index; | |
421 | struct adm9240_data *data = adm9240_update_device(dev); | |
422 | return sprintf(buf, "%u\n", (data->alarms >> bitnr) & 1); | |
423 | } | |
424 | static SENSOR_DEVICE_ATTR(in0_alarm, S_IRUGO, show_alarm, NULL, 0); | |
425 | static SENSOR_DEVICE_ATTR(in1_alarm, S_IRUGO, show_alarm, NULL, 1); | |
426 | static SENSOR_DEVICE_ATTR(in2_alarm, S_IRUGO, show_alarm, NULL, 2); | |
427 | static SENSOR_DEVICE_ATTR(in3_alarm, S_IRUGO, show_alarm, NULL, 3); | |
428 | static SENSOR_DEVICE_ATTR(in4_alarm, S_IRUGO, show_alarm, NULL, 8); | |
429 | static SENSOR_DEVICE_ATTR(in5_alarm, S_IRUGO, show_alarm, NULL, 9); | |
430 | static SENSOR_DEVICE_ATTR(temp1_alarm, S_IRUGO, show_alarm, NULL, 4); | |
431 | static SENSOR_DEVICE_ATTR(fan1_alarm, S_IRUGO, show_alarm, NULL, 6); | |
432 | static SENSOR_DEVICE_ATTR(fan2_alarm, S_IRUGO, show_alarm, NULL, 7); | |
433 | ||
40b5cda2 | 434 | /* vid */ |
e415e48b JD |
435 | static ssize_t show_vid(struct device *dev, |
436 | struct device_attribute *attr, char *buf) | |
40b5cda2 GC |
437 | { |
438 | struct adm9240_data *data = adm9240_update_device(dev); | |
439 | return sprintf(buf, "%d\n", vid_from_reg(data->vid, data->vrm)); | |
440 | } | |
441 | static DEVICE_ATTR(cpu0_vid, S_IRUGO, show_vid, NULL); | |
442 | ||
443 | /* analog output */ | |
e415e48b JD |
444 | static ssize_t show_aout(struct device *dev, |
445 | struct device_attribute *attr, char *buf) | |
40b5cda2 GC |
446 | { |
447 | struct adm9240_data *data = adm9240_update_device(dev); | |
448 | return sprintf(buf, "%d\n", AOUT_FROM_REG(data->aout)); | |
449 | } | |
450 | ||
e415e48b JD |
451 | static ssize_t set_aout(struct device *dev, |
452 | struct device_attribute *attr, | |
453 | const char *buf, size_t count) | |
40b5cda2 GC |
454 | { |
455 | struct i2c_client *client = to_i2c_client(dev); | |
456 | struct adm9240_data *data = i2c_get_clientdata(client); | |
457 | unsigned long val = simple_strtol(buf, NULL, 10); | |
458 | ||
9a61bf63 | 459 | mutex_lock(&data->update_lock); |
40b5cda2 | 460 | data->aout = AOUT_TO_REG(val); |
205cf13e | 461 | i2c_smbus_write_byte_data(client, ADM9240_REG_ANALOG_OUT, data->aout); |
9a61bf63 | 462 | mutex_unlock(&data->update_lock); |
40b5cda2 GC |
463 | return count; |
464 | } | |
465 | static DEVICE_ATTR(aout_output, S_IRUGO | S_IWUSR, show_aout, set_aout); | |
466 | ||
467 | /* chassis_clear */ | |
e415e48b JD |
468 | static ssize_t chassis_clear(struct device *dev, |
469 | struct device_attribute *attr, | |
470 | const char *buf, size_t count) | |
40b5cda2 GC |
471 | { |
472 | struct i2c_client *client = to_i2c_client(dev); | |
473 | unsigned long val = simple_strtol(buf, NULL, 10); | |
474 | ||
475 | if (val == 1) { | |
205cf13e GC |
476 | i2c_smbus_write_byte_data(client, |
477 | ADM9240_REG_CHASSIS_CLEAR, 0x80); | |
40b5cda2 GC |
478 | dev_dbg(&client->dev, "chassis intrusion latch cleared\n"); |
479 | } | |
480 | return count; | |
481 | } | |
482 | static DEVICE_ATTR(chassis_clear, S_IWUSR, NULL, chassis_clear); | |
483 | ||
681c6f7a MH |
484 | static struct attribute *adm9240_attributes[] = { |
485 | &sensor_dev_attr_in0_input.dev_attr.attr, | |
486 | &sensor_dev_attr_in0_min.dev_attr.attr, | |
487 | &sensor_dev_attr_in0_max.dev_attr.attr, | |
360f9452 | 488 | &sensor_dev_attr_in0_alarm.dev_attr.attr, |
681c6f7a MH |
489 | &sensor_dev_attr_in1_input.dev_attr.attr, |
490 | &sensor_dev_attr_in1_min.dev_attr.attr, | |
491 | &sensor_dev_attr_in1_max.dev_attr.attr, | |
360f9452 | 492 | &sensor_dev_attr_in1_alarm.dev_attr.attr, |
681c6f7a MH |
493 | &sensor_dev_attr_in2_input.dev_attr.attr, |
494 | &sensor_dev_attr_in2_min.dev_attr.attr, | |
495 | &sensor_dev_attr_in2_max.dev_attr.attr, | |
360f9452 | 496 | &sensor_dev_attr_in2_alarm.dev_attr.attr, |
681c6f7a MH |
497 | &sensor_dev_attr_in3_input.dev_attr.attr, |
498 | &sensor_dev_attr_in3_min.dev_attr.attr, | |
499 | &sensor_dev_attr_in3_max.dev_attr.attr, | |
360f9452 | 500 | &sensor_dev_attr_in3_alarm.dev_attr.attr, |
681c6f7a MH |
501 | &sensor_dev_attr_in4_input.dev_attr.attr, |
502 | &sensor_dev_attr_in4_min.dev_attr.attr, | |
503 | &sensor_dev_attr_in4_max.dev_attr.attr, | |
360f9452 | 504 | &sensor_dev_attr_in4_alarm.dev_attr.attr, |
681c6f7a MH |
505 | &sensor_dev_attr_in5_input.dev_attr.attr, |
506 | &sensor_dev_attr_in5_min.dev_attr.attr, | |
507 | &sensor_dev_attr_in5_max.dev_attr.attr, | |
360f9452 | 508 | &sensor_dev_attr_in5_alarm.dev_attr.attr, |
681c6f7a MH |
509 | &dev_attr_temp1_input.attr, |
510 | &sensor_dev_attr_temp1_max.dev_attr.attr, | |
511 | &sensor_dev_attr_temp1_max_hyst.dev_attr.attr, | |
360f9452 | 512 | &sensor_dev_attr_temp1_alarm.dev_attr.attr, |
681c6f7a MH |
513 | &sensor_dev_attr_fan1_input.dev_attr.attr, |
514 | &sensor_dev_attr_fan1_div.dev_attr.attr, | |
515 | &sensor_dev_attr_fan1_min.dev_attr.attr, | |
360f9452 | 516 | &sensor_dev_attr_fan1_alarm.dev_attr.attr, |
681c6f7a MH |
517 | &sensor_dev_attr_fan2_input.dev_attr.attr, |
518 | &sensor_dev_attr_fan2_div.dev_attr.attr, | |
519 | &sensor_dev_attr_fan2_min.dev_attr.attr, | |
360f9452 | 520 | &sensor_dev_attr_fan2_alarm.dev_attr.attr, |
681c6f7a MH |
521 | &dev_attr_alarms.attr, |
522 | &dev_attr_aout_output.attr, | |
523 | &dev_attr_chassis_clear.attr, | |
524 | &dev_attr_cpu0_vid.attr, | |
525 | NULL | |
526 | }; | |
527 | ||
528 | static const struct attribute_group adm9240_group = { | |
529 | .attrs = adm9240_attributes, | |
530 | }; | |
531 | ||
40b5cda2 GC |
532 | |
533 | /*** sensor chip detect and driver install ***/ | |
534 | ||
535 | static int adm9240_detect(struct i2c_adapter *adapter, int address, int kind) | |
536 | { | |
537 | struct i2c_client *new_client; | |
538 | struct adm9240_data *data; | |
539 | int err = 0; | |
540 | const char *name = ""; | |
541 | u8 man_id, die_rev; | |
542 | ||
543 | if (!i2c_check_functionality(adapter, I2C_FUNC_SMBUS_BYTE_DATA)) | |
544 | goto exit; | |
545 | ||
205cf13e | 546 | if (!(data = kzalloc(sizeof(*data), GFP_KERNEL))) { |
40b5cda2 GC |
547 | err = -ENOMEM; |
548 | goto exit; | |
549 | } | |
40b5cda2 GC |
550 | |
551 | new_client = &data->client; | |
552 | i2c_set_clientdata(new_client, data); | |
553 | new_client->addr = address; | |
554 | new_client->adapter = adapter; | |
555 | new_client->driver = &adm9240_driver; | |
556 | new_client->flags = 0; | |
557 | ||
558 | if (kind == 0) { | |
559 | kind = adm9240; | |
560 | } | |
561 | ||
562 | if (kind < 0) { | |
563 | ||
564 | /* verify chip: reg address should match i2c address */ | |
205cf13e | 565 | if (i2c_smbus_read_byte_data(new_client, ADM9240_REG_I2C_ADDR) |
40b5cda2 GC |
566 | != address) { |
567 | dev_err(&adapter->dev, "detect fail: address match, " | |
568 | "0x%02x\n", address); | |
569 | goto exit_free; | |
570 | } | |
571 | ||
572 | /* check known chip manufacturer */ | |
205cf13e GC |
573 | man_id = i2c_smbus_read_byte_data(new_client, |
574 | ADM9240_REG_MAN_ID); | |
40b5cda2 GC |
575 | if (man_id == 0x23) { |
576 | kind = adm9240; | |
577 | } else if (man_id == 0xda) { | |
578 | kind = ds1780; | |
579 | } else if (man_id == 0x01) { | |
580 | kind = lm81; | |
581 | } else { | |
582 | dev_err(&adapter->dev, "detect fail: unknown manuf, " | |
583 | "0x%02x\n", man_id); | |
584 | goto exit_free; | |
585 | } | |
586 | ||
587 | /* successful detect, print chip info */ | |
205cf13e GC |
588 | die_rev = i2c_smbus_read_byte_data(new_client, |
589 | ADM9240_REG_DIE_REV); | |
40b5cda2 GC |
590 | dev_info(&adapter->dev, "found %s revision %u\n", |
591 | man_id == 0x23 ? "ADM9240" : | |
592 | man_id == 0xda ? "DS1780" : "LM81", die_rev); | |
593 | } | |
594 | ||
595 | /* either forced or detected chip kind */ | |
596 | if (kind == adm9240) { | |
597 | name = "adm9240"; | |
598 | } else if (kind == ds1780) { | |
599 | name = "ds1780"; | |
600 | } else if (kind == lm81) { | |
601 | name = "lm81"; | |
602 | } | |
603 | ||
604 | /* fill in the remaining client fields and attach */ | |
605 | strlcpy(new_client->name, name, I2C_NAME_SIZE); | |
606 | data->type = kind; | |
9a61bf63 | 607 | mutex_init(&data->update_lock); |
40b5cda2 GC |
608 | |
609 | if ((err = i2c_attach_client(new_client))) | |
610 | goto exit_free; | |
611 | ||
612 | adm9240_init_client(new_client); | |
613 | ||
614 | /* populate sysfs filesystem */ | |
681c6f7a MH |
615 | if ((err = sysfs_create_group(&new_client->dev.kobj, &adm9240_group))) |
616 | goto exit_detach; | |
617 | ||
1beeffe4 TJ |
618 | data->hwmon_dev = hwmon_device_register(&new_client->dev); |
619 | if (IS_ERR(data->hwmon_dev)) { | |
620 | err = PTR_ERR(data->hwmon_dev); | |
681c6f7a | 621 | goto exit_remove; |
943b0830 MH |
622 | } |
623 | ||
40b5cda2 | 624 | return 0; |
943b0830 | 625 | |
681c6f7a MH |
626 | exit_remove: |
627 | sysfs_remove_group(&new_client->dev.kobj, &adm9240_group); | |
943b0830 MH |
628 | exit_detach: |
629 | i2c_detach_client(new_client); | |
40b5cda2 | 630 | exit_free: |
1f57ff89 | 631 | kfree(data); |
40b5cda2 GC |
632 | exit: |
633 | return err; | |
634 | } | |
635 | ||
636 | static int adm9240_attach_adapter(struct i2c_adapter *adapter) | |
637 | { | |
638 | if (!(adapter->class & I2C_CLASS_HWMON)) | |
639 | return 0; | |
2ed2dc3c | 640 | return i2c_probe(adapter, &addr_data, adm9240_detect); |
40b5cda2 GC |
641 | } |
642 | ||
643 | static int adm9240_detach_client(struct i2c_client *client) | |
644 | { | |
943b0830 | 645 | struct adm9240_data *data = i2c_get_clientdata(client); |
40b5cda2 GC |
646 | int err; |
647 | ||
1beeffe4 | 648 | hwmon_device_unregister(data->hwmon_dev); |
681c6f7a | 649 | sysfs_remove_group(&client->dev.kobj, &adm9240_group); |
943b0830 | 650 | |
7bef5594 | 651 | if ((err = i2c_detach_client(client))) |
40b5cda2 | 652 | return err; |
40b5cda2 | 653 | |
943b0830 | 654 | kfree(data); |
40b5cda2 GC |
655 | return 0; |
656 | } | |
657 | ||
658 | static void adm9240_init_client(struct i2c_client *client) | |
659 | { | |
660 | struct adm9240_data *data = i2c_get_clientdata(client); | |
205cf13e GC |
661 | u8 conf = i2c_smbus_read_byte_data(client, ADM9240_REG_CONFIG); |
662 | u8 mode = i2c_smbus_read_byte_data(client, ADM9240_REG_TEMP_CONF) & 3; | |
40b5cda2 | 663 | |
303760b4 | 664 | data->vrm = vid_which_vrm(); /* need this to report vid as mV */ |
40b5cda2 | 665 | |
8e8f9289 GC |
666 | dev_info(&client->dev, "Using VRM: %d.%d\n", data->vrm / 10, |
667 | data->vrm % 10); | |
668 | ||
40b5cda2 GC |
669 | if (conf & 1) { /* measurement cycle running: report state */ |
670 | ||
671 | dev_info(&client->dev, "status: config 0x%02x mode %u\n", | |
672 | conf, mode); | |
673 | ||
674 | } else { /* cold start: open limits before starting chip */ | |
675 | int i; | |
676 | ||
677 | for (i = 0; i < 6; i++) | |
678 | { | |
205cf13e | 679 | i2c_smbus_write_byte_data(client, |
40b5cda2 | 680 | ADM9240_REG_IN_MIN(i), 0); |
205cf13e | 681 | i2c_smbus_write_byte_data(client, |
40b5cda2 GC |
682 | ADM9240_REG_IN_MAX(i), 255); |
683 | } | |
205cf13e GC |
684 | i2c_smbus_write_byte_data(client, |
685 | ADM9240_REG_FAN_MIN(0), 255); | |
686 | i2c_smbus_write_byte_data(client, | |
687 | ADM9240_REG_FAN_MIN(1), 255); | |
688 | i2c_smbus_write_byte_data(client, | |
c7461a66 | 689 | ADM9240_REG_TEMP_MAX(0), 127); |
205cf13e | 690 | i2c_smbus_write_byte_data(client, |
c7461a66 | 691 | ADM9240_REG_TEMP_MAX(1), 127); |
40b5cda2 GC |
692 | |
693 | /* start measurement cycle */ | |
205cf13e | 694 | i2c_smbus_write_byte_data(client, ADM9240_REG_CONFIG, 1); |
40b5cda2 GC |
695 | |
696 | dev_info(&client->dev, "cold start: config was 0x%02x " | |
697 | "mode %u\n", conf, mode); | |
698 | } | |
699 | } | |
700 | ||
701 | static struct adm9240_data *adm9240_update_device(struct device *dev) | |
702 | { | |
703 | struct i2c_client *client = to_i2c_client(dev); | |
704 | struct adm9240_data *data = i2c_get_clientdata(client); | |
705 | int i; | |
706 | ||
9a61bf63 | 707 | mutex_lock(&data->update_lock); |
40b5cda2 GC |
708 | |
709 | /* minimum measurement cycle: 1.75 seconds */ | |
710 | if (time_after(jiffies, data->last_updated_measure + (HZ * 7 / 4)) | |
711 | || !data->valid) { | |
712 | ||
713 | for (i = 0; i < 6; i++) /* read voltages */ | |
714 | { | |
205cf13e | 715 | data->in[i] = i2c_smbus_read_byte_data(client, |
40b5cda2 GC |
716 | ADM9240_REG_IN(i)); |
717 | } | |
205cf13e | 718 | data->alarms = i2c_smbus_read_byte_data(client, |
40b5cda2 | 719 | ADM9240_REG_INT(0)) | |
205cf13e | 720 | i2c_smbus_read_byte_data(client, |
40b5cda2 GC |
721 | ADM9240_REG_INT(1)) << 8; |
722 | ||
723 | /* read temperature: assume temperature changes less than | |
724 | * 0.5'C per two measurement cycles thus ignore possible | |
725 | * but unlikely aliasing error on lsb reading. --Grant */ | |
205cf13e | 726 | data->temp = ((i2c_smbus_read_byte_data(client, |
40b5cda2 | 727 | ADM9240_REG_TEMP) << 8) | |
205cf13e | 728 | i2c_smbus_read_byte_data(client, |
40b5cda2 GC |
729 | ADM9240_REG_TEMP_CONF)) / 128; |
730 | ||
731 | for (i = 0; i < 2; i++) /* read fans */ | |
732 | { | |
205cf13e | 733 | data->fan[i] = i2c_smbus_read_byte_data(client, |
40b5cda2 GC |
734 | ADM9240_REG_FAN(i)); |
735 | ||
736 | /* adjust fan clock divider on overflow */ | |
737 | if (data->valid && data->fan[i] == 255 && | |
738 | data->fan_div[i] < 3) { | |
739 | ||
740 | adm9240_write_fan_div(client, i, | |
741 | ++data->fan_div[i]); | |
742 | ||
743 | /* adjust fan_min if active, but not to 0 */ | |
744 | if (data->fan_min[i] < 255 && | |
745 | data->fan_min[i] >= 2) | |
746 | data->fan_min[i] /= 2; | |
747 | } | |
748 | } | |
749 | data->last_updated_measure = jiffies; | |
750 | } | |
751 | ||
752 | /* minimum config reading cycle: 300 seconds */ | |
753 | if (time_after(jiffies, data->last_updated_config + (HZ * 300)) | |
754 | || !data->valid) { | |
755 | ||
756 | for (i = 0; i < 6; i++) | |
757 | { | |
205cf13e | 758 | data->in_min[i] = i2c_smbus_read_byte_data(client, |
40b5cda2 | 759 | ADM9240_REG_IN_MIN(i)); |
205cf13e | 760 | data->in_max[i] = i2c_smbus_read_byte_data(client, |
40b5cda2 GC |
761 | ADM9240_REG_IN_MAX(i)); |
762 | } | |
763 | for (i = 0; i < 2; i++) | |
764 | { | |
205cf13e | 765 | data->fan_min[i] = i2c_smbus_read_byte_data(client, |
40b5cda2 GC |
766 | ADM9240_REG_FAN_MIN(i)); |
767 | } | |
c7461a66 GC |
768 | data->temp_max[0] = i2c_smbus_read_byte_data(client, |
769 | ADM9240_REG_TEMP_MAX(0)); | |
770 | data->temp_max[1] = i2c_smbus_read_byte_data(client, | |
771 | ADM9240_REG_TEMP_MAX(1)); | |
40b5cda2 GC |
772 | |
773 | /* read fan divs and 5-bit VID */ | |
205cf13e | 774 | i = i2c_smbus_read_byte_data(client, ADM9240_REG_VID_FAN_DIV); |
40b5cda2 GC |
775 | data->fan_div[0] = (i >> 4) & 3; |
776 | data->fan_div[1] = (i >> 6) & 3; | |
777 | data->vid = i & 0x0f; | |
205cf13e | 778 | data->vid |= (i2c_smbus_read_byte_data(client, |
40b5cda2 GC |
779 | ADM9240_REG_VID4) & 1) << 4; |
780 | /* read analog out */ | |
205cf13e | 781 | data->aout = i2c_smbus_read_byte_data(client, |
40b5cda2 GC |
782 | ADM9240_REG_ANALOG_OUT); |
783 | ||
784 | data->last_updated_config = jiffies; | |
785 | data->valid = 1; | |
786 | } | |
9a61bf63 | 787 | mutex_unlock(&data->update_lock); |
40b5cda2 GC |
788 | return data; |
789 | } | |
790 | ||
791 | static int __init sensors_adm9240_init(void) | |
792 | { | |
793 | return i2c_add_driver(&adm9240_driver); | |
794 | } | |
795 | ||
796 | static void __exit sensors_adm9240_exit(void) | |
797 | { | |
798 | i2c_del_driver(&adm9240_driver); | |
799 | } | |
800 | ||
801 | MODULE_AUTHOR("Michiel Rook <michiel@grendelproject.nl>, " | |
2ca7b961 | 802 | "Grant Coady <gcoady.lk@gmail.com> and others"); |
40b5cda2 GC |
803 | MODULE_DESCRIPTION("ADM9240/DS1780/LM81 driver"); |
804 | MODULE_LICENSE("GPL"); | |
805 | ||
806 | module_init(sensors_adm9240_init); | |
807 | module_exit(sensors_adm9240_exit); | |
808 |