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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> | |
8 | * Copyright (C) 2005 Grant Coady <gcoady@gmail.com> with valuable | |
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> |
40b5cda2 GC |
52 | |
53 | /* Addresses to scan */ | |
54 | static unsigned short normal_i2c[] = { 0x2c, 0x2d, 0x2e, 0x2f, | |
55 | I2C_CLIENT_END }; | |
56 | ||
40b5cda2 | 57 | /* Insmod parameters */ |
f4b50261 | 58 | I2C_CLIENT_INSMOD_3(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 | ||
132 | static int adm9240_attach_adapter(struct i2c_adapter *adapter); | |
133 | static int adm9240_detect(struct i2c_adapter *adapter, int address, int kind); | |
134 | static void adm9240_init_client(struct i2c_client *client); | |
135 | static int adm9240_detach_client(struct i2c_client *client); | |
136 | static struct adm9240_data *adm9240_update_device(struct device *dev); | |
137 | ||
138 | /* driver data */ | |
139 | static struct i2c_driver adm9240_driver = { | |
cdaf7934 LR |
140 | .driver = { |
141 | .owner = THIS_MODULE, | |
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; | |
943b0830 | 153 | struct class_device *class_dev; |
40b5cda2 GC |
154 | struct semaphore update_lock; |
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 | ||
199 | down(&data->update_lock); | |
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]); | |
203 | up(&data->update_lock); | |
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 | ||
250 | down(&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]); | |
40b5cda2 GC |
254 | up(&data->update_lock); |
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 | ||
267 | down(&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]); | |
40b5cda2 GC |
271 | up(&data->update_lock); |
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 | ||
354 | down(&data->update_lock); | |
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 | ||
394 | up(&data->update_lock); | |
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 | ||
443 | down(&data->update_lock); | |
444 | data->aout = AOUT_TO_REG(val); | |
205cf13e | 445 | i2c_smbus_write_byte_data(client, ADM9240_REG_ANALOG_OUT, data->aout); |
40b5cda2 GC |
446 | up(&data->update_lock); |
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 | ||
468 | ||
469 | /*** sensor chip detect and driver install ***/ | |
470 | ||
471 | static int adm9240_detect(struct i2c_adapter *adapter, int address, int kind) | |
472 | { | |
473 | struct i2c_client *new_client; | |
474 | struct adm9240_data *data; | |
475 | int err = 0; | |
476 | const char *name = ""; | |
477 | u8 man_id, die_rev; | |
478 | ||
479 | if (!i2c_check_functionality(adapter, I2C_FUNC_SMBUS_BYTE_DATA)) | |
480 | goto exit; | |
481 | ||
205cf13e | 482 | if (!(data = kzalloc(sizeof(*data), GFP_KERNEL))) { |
40b5cda2 GC |
483 | err = -ENOMEM; |
484 | goto exit; | |
485 | } | |
40b5cda2 GC |
486 | |
487 | new_client = &data->client; | |
488 | i2c_set_clientdata(new_client, data); | |
489 | new_client->addr = address; | |
490 | new_client->adapter = adapter; | |
491 | new_client->driver = &adm9240_driver; | |
492 | new_client->flags = 0; | |
493 | ||
494 | if (kind == 0) { | |
495 | kind = adm9240; | |
496 | } | |
497 | ||
498 | if (kind < 0) { | |
499 | ||
500 | /* verify chip: reg address should match i2c address */ | |
205cf13e | 501 | if (i2c_smbus_read_byte_data(new_client, ADM9240_REG_I2C_ADDR) |
40b5cda2 GC |
502 | != address) { |
503 | dev_err(&adapter->dev, "detect fail: address match, " | |
504 | "0x%02x\n", address); | |
505 | goto exit_free; | |
506 | } | |
507 | ||
508 | /* check known chip manufacturer */ | |
205cf13e GC |
509 | man_id = i2c_smbus_read_byte_data(new_client, |
510 | ADM9240_REG_MAN_ID); | |
40b5cda2 GC |
511 | if (man_id == 0x23) { |
512 | kind = adm9240; | |
513 | } else if (man_id == 0xda) { | |
514 | kind = ds1780; | |
515 | } else if (man_id == 0x01) { | |
516 | kind = lm81; | |
517 | } else { | |
518 | dev_err(&adapter->dev, "detect fail: unknown manuf, " | |
519 | "0x%02x\n", man_id); | |
520 | goto exit_free; | |
521 | } | |
522 | ||
523 | /* successful detect, print chip info */ | |
205cf13e GC |
524 | die_rev = i2c_smbus_read_byte_data(new_client, |
525 | ADM9240_REG_DIE_REV); | |
40b5cda2 GC |
526 | dev_info(&adapter->dev, "found %s revision %u\n", |
527 | man_id == 0x23 ? "ADM9240" : | |
528 | man_id == 0xda ? "DS1780" : "LM81", die_rev); | |
529 | } | |
530 | ||
531 | /* either forced or detected chip kind */ | |
532 | if (kind == adm9240) { | |
533 | name = "adm9240"; | |
534 | } else if (kind == ds1780) { | |
535 | name = "ds1780"; | |
536 | } else if (kind == lm81) { | |
537 | name = "lm81"; | |
538 | } | |
539 | ||
540 | /* fill in the remaining client fields and attach */ | |
541 | strlcpy(new_client->name, name, I2C_NAME_SIZE); | |
542 | data->type = kind; | |
543 | init_MUTEX(&data->update_lock); | |
544 | ||
545 | if ((err = i2c_attach_client(new_client))) | |
546 | goto exit_free; | |
547 | ||
548 | adm9240_init_client(new_client); | |
549 | ||
550 | /* populate sysfs filesystem */ | |
943b0830 MH |
551 | data->class_dev = hwmon_device_register(&new_client->dev); |
552 | if (IS_ERR(data->class_dev)) { | |
553 | err = PTR_ERR(data->class_dev); | |
554 | goto exit_detach; | |
555 | } | |
556 | ||
c7461a66 GC |
557 | device_create_file(&new_client->dev, |
558 | &sensor_dev_attr_in0_input.dev_attr); | |
559 | device_create_file(&new_client->dev, | |
560 | &sensor_dev_attr_in0_min.dev_attr); | |
561 | device_create_file(&new_client->dev, | |
562 | &sensor_dev_attr_in0_max.dev_attr); | |
563 | device_create_file(&new_client->dev, | |
564 | &sensor_dev_attr_in1_input.dev_attr); | |
565 | device_create_file(&new_client->dev, | |
566 | &sensor_dev_attr_in1_min.dev_attr); | |
567 | device_create_file(&new_client->dev, | |
568 | &sensor_dev_attr_in1_max.dev_attr); | |
569 | device_create_file(&new_client->dev, | |
570 | &sensor_dev_attr_in2_input.dev_attr); | |
571 | device_create_file(&new_client->dev, | |
572 | &sensor_dev_attr_in2_min.dev_attr); | |
573 | device_create_file(&new_client->dev, | |
574 | &sensor_dev_attr_in2_max.dev_attr); | |
575 | device_create_file(&new_client->dev, | |
576 | &sensor_dev_attr_in3_input.dev_attr); | |
577 | device_create_file(&new_client->dev, | |
578 | &sensor_dev_attr_in3_min.dev_attr); | |
579 | device_create_file(&new_client->dev, | |
580 | &sensor_dev_attr_in3_max.dev_attr); | |
581 | device_create_file(&new_client->dev, | |
582 | &sensor_dev_attr_in4_input.dev_attr); | |
583 | device_create_file(&new_client->dev, | |
584 | &sensor_dev_attr_in4_min.dev_attr); | |
585 | device_create_file(&new_client->dev, | |
586 | &sensor_dev_attr_in4_max.dev_attr); | |
587 | device_create_file(&new_client->dev, | |
588 | &sensor_dev_attr_in5_input.dev_attr); | |
589 | device_create_file(&new_client->dev, | |
590 | &sensor_dev_attr_in5_min.dev_attr); | |
591 | device_create_file(&new_client->dev, | |
592 | &sensor_dev_attr_in5_max.dev_attr); | |
40b5cda2 | 593 | device_create_file(&new_client->dev, &dev_attr_temp1_input); |
c7461a66 GC |
594 | device_create_file(&new_client->dev, |
595 | &sensor_dev_attr_temp1_max.dev_attr); | |
596 | device_create_file(&new_client->dev, | |
597 | &sensor_dev_attr_temp1_max_hyst.dev_attr); | |
598 | device_create_file(&new_client->dev, | |
599 | &sensor_dev_attr_fan1_input.dev_attr); | |
600 | device_create_file(&new_client->dev, | |
601 | &sensor_dev_attr_fan1_div.dev_attr); | |
602 | device_create_file(&new_client->dev, | |
603 | &sensor_dev_attr_fan1_min.dev_attr); | |
604 | device_create_file(&new_client->dev, | |
605 | &sensor_dev_attr_fan2_input.dev_attr); | |
606 | device_create_file(&new_client->dev, | |
607 | &sensor_dev_attr_fan2_div.dev_attr); | |
608 | device_create_file(&new_client->dev, | |
609 | &sensor_dev_attr_fan2_min.dev_attr); | |
40b5cda2 GC |
610 | device_create_file(&new_client->dev, &dev_attr_alarms); |
611 | device_create_file(&new_client->dev, &dev_attr_aout_output); | |
612 | device_create_file(&new_client->dev, &dev_attr_chassis_clear); | |
613 | device_create_file(&new_client->dev, &dev_attr_cpu0_vid); | |
614 | ||
615 | return 0; | |
943b0830 MH |
616 | |
617 | exit_detach: | |
618 | i2c_detach_client(new_client); | |
40b5cda2 | 619 | exit_free: |
1f57ff89 | 620 | kfree(data); |
40b5cda2 GC |
621 | exit: |
622 | return err; | |
623 | } | |
624 | ||
625 | static int adm9240_attach_adapter(struct i2c_adapter *adapter) | |
626 | { | |
627 | if (!(adapter->class & I2C_CLASS_HWMON)) | |
628 | return 0; | |
2ed2dc3c | 629 | return i2c_probe(adapter, &addr_data, adm9240_detect); |
40b5cda2 GC |
630 | } |
631 | ||
632 | static int adm9240_detach_client(struct i2c_client *client) | |
633 | { | |
943b0830 | 634 | struct adm9240_data *data = i2c_get_clientdata(client); |
40b5cda2 GC |
635 | int err; |
636 | ||
943b0830 MH |
637 | hwmon_device_unregister(data->class_dev); |
638 | ||
7bef5594 | 639 | if ((err = i2c_detach_client(client))) |
40b5cda2 | 640 | return err; |
40b5cda2 | 641 | |
943b0830 | 642 | kfree(data); |
40b5cda2 GC |
643 | return 0; |
644 | } | |
645 | ||
646 | static void adm9240_init_client(struct i2c_client *client) | |
647 | { | |
648 | struct adm9240_data *data = i2c_get_clientdata(client); | |
205cf13e GC |
649 | u8 conf = i2c_smbus_read_byte_data(client, ADM9240_REG_CONFIG); |
650 | u8 mode = i2c_smbus_read_byte_data(client, ADM9240_REG_TEMP_CONF) & 3; | |
40b5cda2 | 651 | |
303760b4 | 652 | data->vrm = vid_which_vrm(); /* need this to report vid as mV */ |
40b5cda2 | 653 | |
8e8f9289 GC |
654 | dev_info(&client->dev, "Using VRM: %d.%d\n", data->vrm / 10, |
655 | data->vrm % 10); | |
656 | ||
40b5cda2 GC |
657 | if (conf & 1) { /* measurement cycle running: report state */ |
658 | ||
659 | dev_info(&client->dev, "status: config 0x%02x mode %u\n", | |
660 | conf, mode); | |
661 | ||
662 | } else { /* cold start: open limits before starting chip */ | |
663 | int i; | |
664 | ||
665 | for (i = 0; i < 6; i++) | |
666 | { | |
205cf13e | 667 | i2c_smbus_write_byte_data(client, |
40b5cda2 | 668 | ADM9240_REG_IN_MIN(i), 0); |
205cf13e | 669 | i2c_smbus_write_byte_data(client, |
40b5cda2 GC |
670 | ADM9240_REG_IN_MAX(i), 255); |
671 | } | |
205cf13e GC |
672 | i2c_smbus_write_byte_data(client, |
673 | ADM9240_REG_FAN_MIN(0), 255); | |
674 | i2c_smbus_write_byte_data(client, | |
675 | ADM9240_REG_FAN_MIN(1), 255); | |
676 | i2c_smbus_write_byte_data(client, | |
c7461a66 | 677 | ADM9240_REG_TEMP_MAX(0), 127); |
205cf13e | 678 | i2c_smbus_write_byte_data(client, |
c7461a66 | 679 | ADM9240_REG_TEMP_MAX(1), 127); |
40b5cda2 GC |
680 | |
681 | /* start measurement cycle */ | |
205cf13e | 682 | i2c_smbus_write_byte_data(client, ADM9240_REG_CONFIG, 1); |
40b5cda2 GC |
683 | |
684 | dev_info(&client->dev, "cold start: config was 0x%02x " | |
685 | "mode %u\n", conf, mode); | |
686 | } | |
687 | } | |
688 | ||
689 | static struct adm9240_data *adm9240_update_device(struct device *dev) | |
690 | { | |
691 | struct i2c_client *client = to_i2c_client(dev); | |
692 | struct adm9240_data *data = i2c_get_clientdata(client); | |
693 | int i; | |
694 | ||
695 | down(&data->update_lock); | |
696 | ||
697 | /* minimum measurement cycle: 1.75 seconds */ | |
698 | if (time_after(jiffies, data->last_updated_measure + (HZ * 7 / 4)) | |
699 | || !data->valid) { | |
700 | ||
701 | for (i = 0; i < 6; i++) /* read voltages */ | |
702 | { | |
205cf13e | 703 | data->in[i] = i2c_smbus_read_byte_data(client, |
40b5cda2 GC |
704 | ADM9240_REG_IN(i)); |
705 | } | |
205cf13e | 706 | data->alarms = i2c_smbus_read_byte_data(client, |
40b5cda2 | 707 | ADM9240_REG_INT(0)) | |
205cf13e | 708 | i2c_smbus_read_byte_data(client, |
40b5cda2 GC |
709 | ADM9240_REG_INT(1)) << 8; |
710 | ||
711 | /* read temperature: assume temperature changes less than | |
712 | * 0.5'C per two measurement cycles thus ignore possible | |
713 | * but unlikely aliasing error on lsb reading. --Grant */ | |
205cf13e | 714 | data->temp = ((i2c_smbus_read_byte_data(client, |
40b5cda2 | 715 | ADM9240_REG_TEMP) << 8) | |
205cf13e | 716 | i2c_smbus_read_byte_data(client, |
40b5cda2 GC |
717 | ADM9240_REG_TEMP_CONF)) / 128; |
718 | ||
719 | for (i = 0; i < 2; i++) /* read fans */ | |
720 | { | |
205cf13e | 721 | data->fan[i] = i2c_smbus_read_byte_data(client, |
40b5cda2 GC |
722 | ADM9240_REG_FAN(i)); |
723 | ||
724 | /* adjust fan clock divider on overflow */ | |
725 | if (data->valid && data->fan[i] == 255 && | |
726 | data->fan_div[i] < 3) { | |
727 | ||
728 | adm9240_write_fan_div(client, i, | |
729 | ++data->fan_div[i]); | |
730 | ||
731 | /* adjust fan_min if active, but not to 0 */ | |
732 | if (data->fan_min[i] < 255 && | |
733 | data->fan_min[i] >= 2) | |
734 | data->fan_min[i] /= 2; | |
735 | } | |
736 | } | |
737 | data->last_updated_measure = jiffies; | |
738 | } | |
739 | ||
740 | /* minimum config reading cycle: 300 seconds */ | |
741 | if (time_after(jiffies, data->last_updated_config + (HZ * 300)) | |
742 | || !data->valid) { | |
743 | ||
744 | for (i = 0; i < 6; i++) | |
745 | { | |
205cf13e | 746 | data->in_min[i] = i2c_smbus_read_byte_data(client, |
40b5cda2 | 747 | ADM9240_REG_IN_MIN(i)); |
205cf13e | 748 | data->in_max[i] = i2c_smbus_read_byte_data(client, |
40b5cda2 GC |
749 | ADM9240_REG_IN_MAX(i)); |
750 | } | |
751 | for (i = 0; i < 2; i++) | |
752 | { | |
205cf13e | 753 | data->fan_min[i] = i2c_smbus_read_byte_data(client, |
40b5cda2 GC |
754 | ADM9240_REG_FAN_MIN(i)); |
755 | } | |
c7461a66 GC |
756 | data->temp_max[0] = i2c_smbus_read_byte_data(client, |
757 | ADM9240_REG_TEMP_MAX(0)); | |
758 | data->temp_max[1] = i2c_smbus_read_byte_data(client, | |
759 | ADM9240_REG_TEMP_MAX(1)); | |
40b5cda2 GC |
760 | |
761 | /* read fan divs and 5-bit VID */ | |
205cf13e | 762 | i = i2c_smbus_read_byte_data(client, ADM9240_REG_VID_FAN_DIV); |
40b5cda2 GC |
763 | data->fan_div[0] = (i >> 4) & 3; |
764 | data->fan_div[1] = (i >> 6) & 3; | |
765 | data->vid = i & 0x0f; | |
205cf13e | 766 | data->vid |= (i2c_smbus_read_byte_data(client, |
40b5cda2 GC |
767 | ADM9240_REG_VID4) & 1) << 4; |
768 | /* read analog out */ | |
205cf13e | 769 | data->aout = i2c_smbus_read_byte_data(client, |
40b5cda2 GC |
770 | ADM9240_REG_ANALOG_OUT); |
771 | ||
772 | data->last_updated_config = jiffies; | |
773 | data->valid = 1; | |
774 | } | |
775 | up(&data->update_lock); | |
776 | return data; | |
777 | } | |
778 | ||
779 | static int __init sensors_adm9240_init(void) | |
780 | { | |
781 | return i2c_add_driver(&adm9240_driver); | |
782 | } | |
783 | ||
784 | static void __exit sensors_adm9240_exit(void) | |
785 | { | |
786 | i2c_del_driver(&adm9240_driver); | |
787 | } | |
788 | ||
789 | MODULE_AUTHOR("Michiel Rook <michiel@grendelproject.nl>, " | |
790 | "Grant Coady <gcoady@gmail.com> and others"); | |
791 | MODULE_DESCRIPTION("ADM9240/DS1780/LM81 driver"); | |
792 | MODULE_LICENSE("GPL"); | |
793 | ||
794 | module_init(sensors_adm9240_init); | |
795 | module_exit(sensors_adm9240_exit); | |
796 |