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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 */ | |
55 | static unsigned short normal_i2c[] = { 0x2c, 0x2d, 0x2e, 0x2f, | |
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 | 144 | .id = I2C_DRIVERID_ADM9240, |
40b5cda2 GC |
145 | .attach_adapter = adm9240_attach_adapter, |
146 | .detach_client = adm9240_detach_client, | |
147 | }; | |
148 | ||
149 | /* per client data */ | |
150 | struct adm9240_data { | |
151 | enum chips type; | |
152 | struct i2c_client client; | |
1beeffe4 | 153 | struct device *hwmon_dev; |
9a61bf63 | 154 | struct mutex update_lock; |
40b5cda2 GC |
155 | char valid; |
156 | unsigned long last_updated_measure; | |
157 | unsigned long last_updated_config; | |
158 | ||
159 | u8 in[6]; /* ro in0_input */ | |
160 | u8 in_max[6]; /* rw in0_max */ | |
161 | u8 in_min[6]; /* rw in0_min */ | |
162 | u8 fan[2]; /* ro fan1_input */ | |
163 | u8 fan_min[2]; /* rw fan1_min */ | |
164 | u8 fan_div[2]; /* rw fan1_div, read-only accessor */ | |
165 | s16 temp; /* ro temp1_input, 9-bit sign-extended */ | |
c7461a66 | 166 | s8 temp_max[2]; /* rw 0 -> temp_max, 1 -> temp_max_hyst */ |
40b5cda2 | 167 | u16 alarms; /* ro alarms */ |
8e8f9289 | 168 | u8 aout; /* rw aout_output */ |
40b5cda2 GC |
169 | u8 vid; /* ro vid */ |
170 | u8 vrm; /* -- vrm set on startup, no accessor */ | |
171 | }; | |
172 | ||
40b5cda2 GC |
173 | /*** sysfs accessors ***/ |
174 | ||
175 | /* temperature */ | |
c7461a66 GC |
176 | static ssize_t show_temp(struct device *dev, struct device_attribute *dummy, |
177 | char *buf) | |
178 | { | |
179 | struct adm9240_data *data = adm9240_update_device(dev); | |
180 | return sprintf(buf, "%d\n", data->temp * 500); /* 9-bit value */ | |
181 | } | |
182 | ||
183 | static ssize_t show_max(struct device *dev, struct device_attribute *devattr, | |
184 | char *buf) | |
185 | { | |
186 | struct sensor_device_attribute *attr = to_sensor_dev_attr(devattr); | |
187 | struct adm9240_data *data = adm9240_update_device(dev); | |
188 | return sprintf(buf, "%d\n", data->temp_max[attr->index] * 1000); | |
189 | } | |
190 | ||
191 | static ssize_t set_max(struct device *dev, struct device_attribute *devattr, | |
192 | const char *buf, size_t count) | |
193 | { | |
194 | struct sensor_device_attribute *attr = to_sensor_dev_attr(devattr); | |
195 | struct i2c_client *client = to_i2c_client(dev); | |
196 | struct adm9240_data *data = i2c_get_clientdata(client); | |
197 | long val = simple_strtol(buf, NULL, 10); | |
198 | ||
9a61bf63 | 199 | mutex_lock(&data->update_lock); |
c7461a66 GC |
200 | data->temp_max[attr->index] = TEMP_TO_REG(val); |
201 | i2c_smbus_write_byte_data(client, ADM9240_REG_TEMP_MAX(attr->index), | |
202 | data->temp_max[attr->index]); | |
9a61bf63 | 203 | mutex_unlock(&data->update_lock); |
c7461a66 GC |
204 | return count; |
205 | } | |
206 | ||
40b5cda2 | 207 | static DEVICE_ATTR(temp1_input, S_IRUGO, show_temp, NULL); |
c7461a66 GC |
208 | static SENSOR_DEVICE_ATTR(temp1_max, S_IWUSR | S_IRUGO, |
209 | show_max, set_max, 0); | |
210 | static SENSOR_DEVICE_ATTR(temp1_max_hyst, S_IWUSR | S_IRUGO, | |
211 | show_max, set_max, 1); | |
40b5cda2 GC |
212 | |
213 | /* voltage */ | |
c7461a66 GC |
214 | static ssize_t show_in(struct device *dev, struct device_attribute *devattr, |
215 | char *buf) | |
40b5cda2 | 216 | { |
c7461a66 | 217 | struct sensor_device_attribute *attr = to_sensor_dev_attr(devattr); |
40b5cda2 | 218 | struct adm9240_data *data = adm9240_update_device(dev); |
c7461a66 GC |
219 | return sprintf(buf, "%d\n", IN_FROM_REG(data->in[attr->index], |
220 | attr->index)); | |
40b5cda2 GC |
221 | } |
222 | ||
e415e48b JD |
223 | static ssize_t show_in_min(struct device *dev, |
224 | struct device_attribute *devattr, char *buf) | |
40b5cda2 | 225 | { |
c7461a66 | 226 | struct sensor_device_attribute *attr = to_sensor_dev_attr(devattr); |
40b5cda2 | 227 | struct adm9240_data *data = adm9240_update_device(dev); |
c7461a66 GC |
228 | return sprintf(buf, "%d\n", IN_FROM_REG(data->in_min[attr->index], |
229 | attr->index)); | |
40b5cda2 GC |
230 | } |
231 | ||
e415e48b JD |
232 | static ssize_t show_in_max(struct device *dev, |
233 | struct device_attribute *devattr, char *buf) | |
40b5cda2 | 234 | { |
c7461a66 | 235 | struct sensor_device_attribute *attr = to_sensor_dev_attr(devattr); |
40b5cda2 | 236 | struct adm9240_data *data = adm9240_update_device(dev); |
c7461a66 GC |
237 | return sprintf(buf, "%d\n", IN_FROM_REG(data->in_max[attr->index], |
238 | attr->index)); | |
40b5cda2 GC |
239 | } |
240 | ||
e415e48b JD |
241 | static ssize_t set_in_min(struct device *dev, |
242 | struct device_attribute *devattr, | |
c7461a66 | 243 | const char *buf, size_t count) |
40b5cda2 | 244 | { |
c7461a66 | 245 | struct sensor_device_attribute *attr = to_sensor_dev_attr(devattr); |
40b5cda2 GC |
246 | struct i2c_client *client = to_i2c_client(dev); |
247 | struct adm9240_data *data = i2c_get_clientdata(client); | |
248 | unsigned long val = simple_strtoul(buf, NULL, 10); | |
249 | ||
9a61bf63 | 250 | mutex_lock(&data->update_lock); |
c7461a66 GC |
251 | data->in_min[attr->index] = IN_TO_REG(val, attr->index); |
252 | i2c_smbus_write_byte_data(client, ADM9240_REG_IN_MIN(attr->index), | |
253 | data->in_min[attr->index]); | |
9a61bf63 | 254 | mutex_unlock(&data->update_lock); |
40b5cda2 GC |
255 | return count; |
256 | } | |
257 | ||
e415e48b JD |
258 | static ssize_t set_in_max(struct device *dev, |
259 | struct device_attribute *devattr, | |
c7461a66 | 260 | const char *buf, size_t count) |
40b5cda2 | 261 | { |
c7461a66 | 262 | struct sensor_device_attribute *attr = to_sensor_dev_attr(devattr); |
40b5cda2 GC |
263 | struct i2c_client *client = to_i2c_client(dev); |
264 | struct adm9240_data *data = i2c_get_clientdata(client); | |
265 | unsigned long val = simple_strtoul(buf, NULL, 10); | |
266 | ||
9a61bf63 | 267 | mutex_lock(&data->update_lock); |
c7461a66 GC |
268 | data->in_max[attr->index] = IN_TO_REG(val, attr->index); |
269 | i2c_smbus_write_byte_data(client, ADM9240_REG_IN_MAX(attr->index), | |
270 | data->in_max[attr->index]); | |
9a61bf63 | 271 | mutex_unlock(&data->update_lock); |
40b5cda2 GC |
272 | return count; |
273 | } | |
274 | ||
c7461a66 GC |
275 | #define vin(nr) \ |
276 | static SENSOR_DEVICE_ATTR(in##nr##_input, S_IRUGO, \ | |
277 | show_in, NULL, nr); \ | |
278 | static SENSOR_DEVICE_ATTR(in##nr##_min, S_IRUGO | S_IWUSR, \ | |
279 | show_in_min, set_in_min, nr); \ | |
280 | static SENSOR_DEVICE_ATTR(in##nr##_max, S_IRUGO | S_IWUSR, \ | |
281 | show_in_max, set_in_max, nr); | |
282 | ||
283 | vin(0); | |
284 | vin(1); | |
285 | vin(2); | |
286 | vin(3); | |
287 | vin(4); | |
288 | vin(5); | |
40b5cda2 GC |
289 | |
290 | /* fans */ | |
c7461a66 GC |
291 | static ssize_t show_fan(struct device *dev, |
292 | struct device_attribute *devattr, char *buf) | |
40b5cda2 | 293 | { |
c7461a66 | 294 | struct sensor_device_attribute *attr = to_sensor_dev_attr(devattr); |
40b5cda2 | 295 | struct adm9240_data *data = adm9240_update_device(dev); |
c7461a66 GC |
296 | return sprintf(buf, "%d\n", FAN_FROM_REG(data->fan[attr->index], |
297 | 1 << data->fan_div[attr->index])); | |
40b5cda2 GC |
298 | } |
299 | ||
c7461a66 GC |
300 | static ssize_t show_fan_min(struct device *dev, |
301 | struct device_attribute *devattr, char *buf) | |
40b5cda2 | 302 | { |
c7461a66 | 303 | struct sensor_device_attribute *attr = to_sensor_dev_attr(devattr); |
40b5cda2 | 304 | struct adm9240_data *data = adm9240_update_device(dev); |
c7461a66 GC |
305 | return sprintf(buf, "%d\n", FAN_FROM_REG(data->fan_min[attr->index], |
306 | 1 << data->fan_div[attr->index])); | |
40b5cda2 GC |
307 | } |
308 | ||
c7461a66 GC |
309 | static ssize_t show_fan_div(struct device *dev, |
310 | struct device_attribute *devattr, char *buf) | |
40b5cda2 | 311 | { |
c7461a66 | 312 | struct sensor_device_attribute *attr = to_sensor_dev_attr(devattr); |
40b5cda2 | 313 | struct adm9240_data *data = adm9240_update_device(dev); |
c7461a66 | 314 | return sprintf(buf, "%d\n", 1 << data->fan_div[attr->index]); |
40b5cda2 GC |
315 | } |
316 | ||
317 | /* write new fan div, callers must hold data->update_lock */ | |
318 | static void adm9240_write_fan_div(struct i2c_client *client, int nr, | |
319 | u8 fan_div) | |
320 | { | |
321 | u8 reg, old, shift = (nr + 2) * 2; | |
322 | ||
205cf13e | 323 | reg = i2c_smbus_read_byte_data(client, ADM9240_REG_VID_FAN_DIV); |
40b5cda2 GC |
324 | old = (reg >> shift) & 3; |
325 | reg &= ~(3 << shift); | |
326 | reg |= (fan_div << shift); | |
205cf13e | 327 | i2c_smbus_write_byte_data(client, ADM9240_REG_VID_FAN_DIV, reg); |
40b5cda2 GC |
328 | dev_dbg(&client->dev, "fan%d clock divider changed from %u " |
329 | "to %u\n", nr + 1, 1 << old, 1 << fan_div); | |
330 | } | |
331 | ||
e415e48b | 332 | /* |
40b5cda2 GC |
333 | * set fan speed low limit: |
334 | * | |
335 | * - value is zero: disable fan speed low limit alarm | |
336 | * | |
337 | * - value is below fan speed measurement range: enable fan speed low | |
338 | * limit alarm to be asserted while fan speed too slow to measure | |
339 | * | |
340 | * - otherwise: select fan clock divider to suit fan speed low limit, | |
341 | * measurement code may adjust registers to ensure fan speed reading | |
342 | */ | |
c7461a66 GC |
343 | static ssize_t set_fan_min(struct device *dev, |
344 | struct device_attribute *devattr, | |
345 | const char *buf, size_t count) | |
40b5cda2 | 346 | { |
c7461a66 | 347 | struct sensor_device_attribute *attr = to_sensor_dev_attr(devattr); |
40b5cda2 GC |
348 | struct i2c_client *client = to_i2c_client(dev); |
349 | struct adm9240_data *data = i2c_get_clientdata(client); | |
350 | unsigned long val = simple_strtoul(buf, NULL, 10); | |
c7461a66 | 351 | int nr = attr->index; |
40b5cda2 GC |
352 | u8 new_div; |
353 | ||
9a61bf63 | 354 | mutex_lock(&data->update_lock); |
40b5cda2 GC |
355 | |
356 | if (!val) { | |
357 | data->fan_min[nr] = 255; | |
358 | new_div = data->fan_div[nr]; | |
359 | ||
360 | dev_dbg(&client->dev, "fan%u low limit set disabled\n", | |
361 | nr + 1); | |
362 | ||
363 | } else if (val < 1350000 / (8 * 254)) { | |
364 | new_div = 3; | |
365 | data->fan_min[nr] = 254; | |
366 | ||
367 | dev_dbg(&client->dev, "fan%u low limit set minimum %u\n", | |
368 | nr + 1, FAN_FROM_REG(254, 1 << new_div)); | |
369 | ||
370 | } else { | |
371 | unsigned int new_min = 1350000 / val; | |
372 | ||
373 | new_div = 0; | |
374 | while (new_min > 192 && new_div < 3) { | |
375 | new_div++; | |
376 | new_min /= 2; | |
377 | } | |
378 | if (!new_min) /* keep > 0 */ | |
379 | new_min++; | |
380 | ||
381 | data->fan_min[nr] = new_min; | |
382 | ||
383 | dev_dbg(&client->dev, "fan%u low limit set fan speed %u\n", | |
384 | nr + 1, FAN_FROM_REG(new_min, 1 << new_div)); | |
385 | } | |
386 | ||
387 | if (new_div != data->fan_div[nr]) { | |
388 | data->fan_div[nr] = new_div; | |
389 | adm9240_write_fan_div(client, nr, new_div); | |
390 | } | |
205cf13e | 391 | i2c_smbus_write_byte_data(client, ADM9240_REG_FAN_MIN(nr), |
40b5cda2 GC |
392 | data->fan_min[nr]); |
393 | ||
9a61bf63 | 394 | mutex_unlock(&data->update_lock); |
40b5cda2 GC |
395 | return count; |
396 | } | |
397 | ||
c7461a66 GC |
398 | #define fan(nr) \ |
399 | static SENSOR_DEVICE_ATTR(fan##nr##_input, S_IRUGO, \ | |
400 | show_fan, NULL, nr - 1); \ | |
401 | static SENSOR_DEVICE_ATTR(fan##nr##_div, S_IRUGO, \ | |
402 | show_fan_div, NULL, nr - 1); \ | |
403 | static SENSOR_DEVICE_ATTR(fan##nr##_min, S_IRUGO | S_IWUSR, \ | |
404 | show_fan_min, set_fan_min, nr - 1); | |
405 | ||
406 | fan(1); | |
407 | fan(2); | |
40b5cda2 GC |
408 | |
409 | /* alarms */ | |
e415e48b JD |
410 | static ssize_t show_alarms(struct device *dev, |
411 | struct device_attribute *attr, char *buf) | |
40b5cda2 GC |
412 | { |
413 | struct adm9240_data *data = adm9240_update_device(dev); | |
414 | return sprintf(buf, "%u\n", data->alarms); | |
415 | } | |
416 | static DEVICE_ATTR(alarms, S_IRUGO, show_alarms, NULL); | |
417 | ||
418 | /* vid */ | |
e415e48b JD |
419 | static ssize_t show_vid(struct device *dev, |
420 | struct device_attribute *attr, char *buf) | |
40b5cda2 GC |
421 | { |
422 | struct adm9240_data *data = adm9240_update_device(dev); | |
423 | return sprintf(buf, "%d\n", vid_from_reg(data->vid, data->vrm)); | |
424 | } | |
425 | static DEVICE_ATTR(cpu0_vid, S_IRUGO, show_vid, NULL); | |
426 | ||
427 | /* analog output */ | |
e415e48b JD |
428 | static ssize_t show_aout(struct device *dev, |
429 | struct device_attribute *attr, char *buf) | |
40b5cda2 GC |
430 | { |
431 | struct adm9240_data *data = adm9240_update_device(dev); | |
432 | return sprintf(buf, "%d\n", AOUT_FROM_REG(data->aout)); | |
433 | } | |
434 | ||
e415e48b JD |
435 | static ssize_t set_aout(struct device *dev, |
436 | struct device_attribute *attr, | |
437 | const char *buf, size_t count) | |
40b5cda2 GC |
438 | { |
439 | struct i2c_client *client = to_i2c_client(dev); | |
440 | struct adm9240_data *data = i2c_get_clientdata(client); | |
441 | unsigned long val = simple_strtol(buf, NULL, 10); | |
442 | ||
9a61bf63 | 443 | mutex_lock(&data->update_lock); |
40b5cda2 | 444 | data->aout = AOUT_TO_REG(val); |
205cf13e | 445 | i2c_smbus_write_byte_data(client, ADM9240_REG_ANALOG_OUT, data->aout); |
9a61bf63 | 446 | mutex_unlock(&data->update_lock); |
40b5cda2 GC |
447 | return count; |
448 | } | |
449 | static DEVICE_ATTR(aout_output, S_IRUGO | S_IWUSR, show_aout, set_aout); | |
450 | ||
451 | /* chassis_clear */ | |
e415e48b JD |
452 | static ssize_t chassis_clear(struct device *dev, |
453 | struct device_attribute *attr, | |
454 | const char *buf, size_t count) | |
40b5cda2 GC |
455 | { |
456 | struct i2c_client *client = to_i2c_client(dev); | |
457 | unsigned long val = simple_strtol(buf, NULL, 10); | |
458 | ||
459 | if (val == 1) { | |
205cf13e GC |
460 | i2c_smbus_write_byte_data(client, |
461 | ADM9240_REG_CHASSIS_CLEAR, 0x80); | |
40b5cda2 GC |
462 | dev_dbg(&client->dev, "chassis intrusion latch cleared\n"); |
463 | } | |
464 | return count; | |
465 | } | |
466 | static DEVICE_ATTR(chassis_clear, S_IWUSR, NULL, chassis_clear); | |
467 | ||
681c6f7a MH |
468 | static struct attribute *adm9240_attributes[] = { |
469 | &sensor_dev_attr_in0_input.dev_attr.attr, | |
470 | &sensor_dev_attr_in0_min.dev_attr.attr, | |
471 | &sensor_dev_attr_in0_max.dev_attr.attr, | |
472 | &sensor_dev_attr_in1_input.dev_attr.attr, | |
473 | &sensor_dev_attr_in1_min.dev_attr.attr, | |
474 | &sensor_dev_attr_in1_max.dev_attr.attr, | |
475 | &sensor_dev_attr_in2_input.dev_attr.attr, | |
476 | &sensor_dev_attr_in2_min.dev_attr.attr, | |
477 | &sensor_dev_attr_in2_max.dev_attr.attr, | |
478 | &sensor_dev_attr_in3_input.dev_attr.attr, | |
479 | &sensor_dev_attr_in3_min.dev_attr.attr, | |
480 | &sensor_dev_attr_in3_max.dev_attr.attr, | |
481 | &sensor_dev_attr_in4_input.dev_attr.attr, | |
482 | &sensor_dev_attr_in4_min.dev_attr.attr, | |
483 | &sensor_dev_attr_in4_max.dev_attr.attr, | |
484 | &sensor_dev_attr_in5_input.dev_attr.attr, | |
485 | &sensor_dev_attr_in5_min.dev_attr.attr, | |
486 | &sensor_dev_attr_in5_max.dev_attr.attr, | |
487 | &dev_attr_temp1_input.attr, | |
488 | &sensor_dev_attr_temp1_max.dev_attr.attr, | |
489 | &sensor_dev_attr_temp1_max_hyst.dev_attr.attr, | |
490 | &sensor_dev_attr_fan1_input.dev_attr.attr, | |
491 | &sensor_dev_attr_fan1_div.dev_attr.attr, | |
492 | &sensor_dev_attr_fan1_min.dev_attr.attr, | |
493 | &sensor_dev_attr_fan2_input.dev_attr.attr, | |
494 | &sensor_dev_attr_fan2_div.dev_attr.attr, | |
495 | &sensor_dev_attr_fan2_min.dev_attr.attr, | |
496 | &dev_attr_alarms.attr, | |
497 | &dev_attr_aout_output.attr, | |
498 | &dev_attr_chassis_clear.attr, | |
499 | &dev_attr_cpu0_vid.attr, | |
500 | NULL | |
501 | }; | |
502 | ||
503 | static const struct attribute_group adm9240_group = { | |
504 | .attrs = adm9240_attributes, | |
505 | }; | |
506 | ||
40b5cda2 GC |
507 | |
508 | /*** sensor chip detect and driver install ***/ | |
509 | ||
510 | static int adm9240_detect(struct i2c_adapter *adapter, int address, int kind) | |
511 | { | |
512 | struct i2c_client *new_client; | |
513 | struct adm9240_data *data; | |
514 | int err = 0; | |
515 | const char *name = ""; | |
516 | u8 man_id, die_rev; | |
517 | ||
518 | if (!i2c_check_functionality(adapter, I2C_FUNC_SMBUS_BYTE_DATA)) | |
519 | goto exit; | |
520 | ||
205cf13e | 521 | if (!(data = kzalloc(sizeof(*data), GFP_KERNEL))) { |
40b5cda2 GC |
522 | err = -ENOMEM; |
523 | goto exit; | |
524 | } | |
40b5cda2 GC |
525 | |
526 | new_client = &data->client; | |
527 | i2c_set_clientdata(new_client, data); | |
528 | new_client->addr = address; | |
529 | new_client->adapter = adapter; | |
530 | new_client->driver = &adm9240_driver; | |
531 | new_client->flags = 0; | |
532 | ||
533 | if (kind == 0) { | |
534 | kind = adm9240; | |
535 | } | |
536 | ||
537 | if (kind < 0) { | |
538 | ||
539 | /* verify chip: reg address should match i2c address */ | |
205cf13e | 540 | if (i2c_smbus_read_byte_data(new_client, ADM9240_REG_I2C_ADDR) |
40b5cda2 GC |
541 | != address) { |
542 | dev_err(&adapter->dev, "detect fail: address match, " | |
543 | "0x%02x\n", address); | |
544 | goto exit_free; | |
545 | } | |
546 | ||
547 | /* check known chip manufacturer */ | |
205cf13e GC |
548 | man_id = i2c_smbus_read_byte_data(new_client, |
549 | ADM9240_REG_MAN_ID); | |
40b5cda2 GC |
550 | if (man_id == 0x23) { |
551 | kind = adm9240; | |
552 | } else if (man_id == 0xda) { | |
553 | kind = ds1780; | |
554 | } else if (man_id == 0x01) { | |
555 | kind = lm81; | |
556 | } else { | |
557 | dev_err(&adapter->dev, "detect fail: unknown manuf, " | |
558 | "0x%02x\n", man_id); | |
559 | goto exit_free; | |
560 | } | |
561 | ||
562 | /* successful detect, print chip info */ | |
205cf13e GC |
563 | die_rev = i2c_smbus_read_byte_data(new_client, |
564 | ADM9240_REG_DIE_REV); | |
40b5cda2 GC |
565 | dev_info(&adapter->dev, "found %s revision %u\n", |
566 | man_id == 0x23 ? "ADM9240" : | |
567 | man_id == 0xda ? "DS1780" : "LM81", die_rev); | |
568 | } | |
569 | ||
570 | /* either forced or detected chip kind */ | |
571 | if (kind == adm9240) { | |
572 | name = "adm9240"; | |
573 | } else if (kind == ds1780) { | |
574 | name = "ds1780"; | |
575 | } else if (kind == lm81) { | |
576 | name = "lm81"; | |
577 | } | |
578 | ||
579 | /* fill in the remaining client fields and attach */ | |
580 | strlcpy(new_client->name, name, I2C_NAME_SIZE); | |
581 | data->type = kind; | |
9a61bf63 | 582 | mutex_init(&data->update_lock); |
40b5cda2 GC |
583 | |
584 | if ((err = i2c_attach_client(new_client))) | |
585 | goto exit_free; | |
586 | ||
587 | adm9240_init_client(new_client); | |
588 | ||
589 | /* populate sysfs filesystem */ | |
681c6f7a MH |
590 | if ((err = sysfs_create_group(&new_client->dev.kobj, &adm9240_group))) |
591 | goto exit_detach; | |
592 | ||
1beeffe4 TJ |
593 | data->hwmon_dev = hwmon_device_register(&new_client->dev); |
594 | if (IS_ERR(data->hwmon_dev)) { | |
595 | err = PTR_ERR(data->hwmon_dev); | |
681c6f7a | 596 | goto exit_remove; |
943b0830 MH |
597 | } |
598 | ||
40b5cda2 | 599 | return 0; |
943b0830 | 600 | |
681c6f7a MH |
601 | exit_remove: |
602 | sysfs_remove_group(&new_client->dev.kobj, &adm9240_group); | |
943b0830 MH |
603 | exit_detach: |
604 | i2c_detach_client(new_client); | |
40b5cda2 | 605 | exit_free: |
1f57ff89 | 606 | kfree(data); |
40b5cda2 GC |
607 | exit: |
608 | return err; | |
609 | } | |
610 | ||
611 | static int adm9240_attach_adapter(struct i2c_adapter *adapter) | |
612 | { | |
613 | if (!(adapter->class & I2C_CLASS_HWMON)) | |
614 | return 0; | |
2ed2dc3c | 615 | return i2c_probe(adapter, &addr_data, adm9240_detect); |
40b5cda2 GC |
616 | } |
617 | ||
618 | static int adm9240_detach_client(struct i2c_client *client) | |
619 | { | |
943b0830 | 620 | struct adm9240_data *data = i2c_get_clientdata(client); |
40b5cda2 GC |
621 | int err; |
622 | ||
1beeffe4 | 623 | hwmon_device_unregister(data->hwmon_dev); |
681c6f7a | 624 | sysfs_remove_group(&client->dev.kobj, &adm9240_group); |
943b0830 | 625 | |
7bef5594 | 626 | if ((err = i2c_detach_client(client))) |
40b5cda2 | 627 | return err; |
40b5cda2 | 628 | |
943b0830 | 629 | kfree(data); |
40b5cda2 GC |
630 | return 0; |
631 | } | |
632 | ||
633 | static void adm9240_init_client(struct i2c_client *client) | |
634 | { | |
635 | struct adm9240_data *data = i2c_get_clientdata(client); | |
205cf13e GC |
636 | u8 conf = i2c_smbus_read_byte_data(client, ADM9240_REG_CONFIG); |
637 | u8 mode = i2c_smbus_read_byte_data(client, ADM9240_REG_TEMP_CONF) & 3; | |
40b5cda2 | 638 | |
303760b4 | 639 | data->vrm = vid_which_vrm(); /* need this to report vid as mV */ |
40b5cda2 | 640 | |
8e8f9289 GC |
641 | dev_info(&client->dev, "Using VRM: %d.%d\n", data->vrm / 10, |
642 | data->vrm % 10); | |
643 | ||
40b5cda2 GC |
644 | if (conf & 1) { /* measurement cycle running: report state */ |
645 | ||
646 | dev_info(&client->dev, "status: config 0x%02x mode %u\n", | |
647 | conf, mode); | |
648 | ||
649 | } else { /* cold start: open limits before starting chip */ | |
650 | int i; | |
651 | ||
652 | for (i = 0; i < 6; i++) | |
653 | { | |
205cf13e | 654 | i2c_smbus_write_byte_data(client, |
40b5cda2 | 655 | ADM9240_REG_IN_MIN(i), 0); |
205cf13e | 656 | i2c_smbus_write_byte_data(client, |
40b5cda2 GC |
657 | ADM9240_REG_IN_MAX(i), 255); |
658 | } | |
205cf13e GC |
659 | i2c_smbus_write_byte_data(client, |
660 | ADM9240_REG_FAN_MIN(0), 255); | |
661 | i2c_smbus_write_byte_data(client, | |
662 | ADM9240_REG_FAN_MIN(1), 255); | |
663 | i2c_smbus_write_byte_data(client, | |
c7461a66 | 664 | ADM9240_REG_TEMP_MAX(0), 127); |
205cf13e | 665 | i2c_smbus_write_byte_data(client, |
c7461a66 | 666 | ADM9240_REG_TEMP_MAX(1), 127); |
40b5cda2 GC |
667 | |
668 | /* start measurement cycle */ | |
205cf13e | 669 | i2c_smbus_write_byte_data(client, ADM9240_REG_CONFIG, 1); |
40b5cda2 GC |
670 | |
671 | dev_info(&client->dev, "cold start: config was 0x%02x " | |
672 | "mode %u\n", conf, mode); | |
673 | } | |
674 | } | |
675 | ||
676 | static struct adm9240_data *adm9240_update_device(struct device *dev) | |
677 | { | |
678 | struct i2c_client *client = to_i2c_client(dev); | |
679 | struct adm9240_data *data = i2c_get_clientdata(client); | |
680 | int i; | |
681 | ||
9a61bf63 | 682 | mutex_lock(&data->update_lock); |
40b5cda2 GC |
683 | |
684 | /* minimum measurement cycle: 1.75 seconds */ | |
685 | if (time_after(jiffies, data->last_updated_measure + (HZ * 7 / 4)) | |
686 | || !data->valid) { | |
687 | ||
688 | for (i = 0; i < 6; i++) /* read voltages */ | |
689 | { | |
205cf13e | 690 | data->in[i] = i2c_smbus_read_byte_data(client, |
40b5cda2 GC |
691 | ADM9240_REG_IN(i)); |
692 | } | |
205cf13e | 693 | data->alarms = i2c_smbus_read_byte_data(client, |
40b5cda2 | 694 | ADM9240_REG_INT(0)) | |
205cf13e | 695 | i2c_smbus_read_byte_data(client, |
40b5cda2 GC |
696 | ADM9240_REG_INT(1)) << 8; |
697 | ||
698 | /* read temperature: assume temperature changes less than | |
699 | * 0.5'C per two measurement cycles thus ignore possible | |
700 | * but unlikely aliasing error on lsb reading. --Grant */ | |
205cf13e | 701 | data->temp = ((i2c_smbus_read_byte_data(client, |
40b5cda2 | 702 | ADM9240_REG_TEMP) << 8) | |
205cf13e | 703 | i2c_smbus_read_byte_data(client, |
40b5cda2 GC |
704 | ADM9240_REG_TEMP_CONF)) / 128; |
705 | ||
706 | for (i = 0; i < 2; i++) /* read fans */ | |
707 | { | |
205cf13e | 708 | data->fan[i] = i2c_smbus_read_byte_data(client, |
40b5cda2 GC |
709 | ADM9240_REG_FAN(i)); |
710 | ||
711 | /* adjust fan clock divider on overflow */ | |
712 | if (data->valid && data->fan[i] == 255 && | |
713 | data->fan_div[i] < 3) { | |
714 | ||
715 | adm9240_write_fan_div(client, i, | |
716 | ++data->fan_div[i]); | |
717 | ||
718 | /* adjust fan_min if active, but not to 0 */ | |
719 | if (data->fan_min[i] < 255 && | |
720 | data->fan_min[i] >= 2) | |
721 | data->fan_min[i] /= 2; | |
722 | } | |
723 | } | |
724 | data->last_updated_measure = jiffies; | |
725 | } | |
726 | ||
727 | /* minimum config reading cycle: 300 seconds */ | |
728 | if (time_after(jiffies, data->last_updated_config + (HZ * 300)) | |
729 | || !data->valid) { | |
730 | ||
731 | for (i = 0; i < 6; i++) | |
732 | { | |
205cf13e | 733 | data->in_min[i] = i2c_smbus_read_byte_data(client, |
40b5cda2 | 734 | ADM9240_REG_IN_MIN(i)); |
205cf13e | 735 | data->in_max[i] = i2c_smbus_read_byte_data(client, |
40b5cda2 GC |
736 | ADM9240_REG_IN_MAX(i)); |
737 | } | |
738 | for (i = 0; i < 2; i++) | |
739 | { | |
205cf13e | 740 | data->fan_min[i] = i2c_smbus_read_byte_data(client, |
40b5cda2 GC |
741 | ADM9240_REG_FAN_MIN(i)); |
742 | } | |
c7461a66 GC |
743 | data->temp_max[0] = i2c_smbus_read_byte_data(client, |
744 | ADM9240_REG_TEMP_MAX(0)); | |
745 | data->temp_max[1] = i2c_smbus_read_byte_data(client, | |
746 | ADM9240_REG_TEMP_MAX(1)); | |
40b5cda2 GC |
747 | |
748 | /* read fan divs and 5-bit VID */ | |
205cf13e | 749 | i = i2c_smbus_read_byte_data(client, ADM9240_REG_VID_FAN_DIV); |
40b5cda2 GC |
750 | data->fan_div[0] = (i >> 4) & 3; |
751 | data->fan_div[1] = (i >> 6) & 3; | |
752 | data->vid = i & 0x0f; | |
205cf13e | 753 | data->vid |= (i2c_smbus_read_byte_data(client, |
40b5cda2 GC |
754 | ADM9240_REG_VID4) & 1) << 4; |
755 | /* read analog out */ | |
205cf13e | 756 | data->aout = i2c_smbus_read_byte_data(client, |
40b5cda2 GC |
757 | ADM9240_REG_ANALOG_OUT); |
758 | ||
759 | data->last_updated_config = jiffies; | |
760 | data->valid = 1; | |
761 | } | |
9a61bf63 | 762 | mutex_unlock(&data->update_lock); |
40b5cda2 GC |
763 | return data; |
764 | } | |
765 | ||
766 | static int __init sensors_adm9240_init(void) | |
767 | { | |
768 | return i2c_add_driver(&adm9240_driver); | |
769 | } | |
770 | ||
771 | static void __exit sensors_adm9240_exit(void) | |
772 | { | |
773 | i2c_del_driver(&adm9240_driver); | |
774 | } | |
775 | ||
776 | MODULE_AUTHOR("Michiel Rook <michiel@grendelproject.nl>, " | |
2ca7b961 | 777 | "Grant Coady <gcoady.lk@gmail.com> and others"); |
40b5cda2 GC |
778 | MODULE_DESCRIPTION("ADM9240/DS1780/LM81 driver"); |
779 | MODULE_LICENSE("GPL"); | |
780 | ||
781 | module_init(sensors_adm9240_init); | |
782 | module_exit(sensors_adm9240_exit); | |
783 |