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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> | |
40b5cda2 | 48 | #include <linux/i2c-vid.h> |
943b0830 MH |
49 | #include <linux/hwmon.h> |
50 | #include <linux/err.h> | |
40b5cda2 GC |
51 | |
52 | /* Addresses to scan */ | |
53 | static unsigned short normal_i2c[] = { 0x2c, 0x2d, 0x2e, 0x2f, | |
54 | I2C_CLIENT_END }; | |
55 | ||
40b5cda2 | 56 | /* Insmod parameters */ |
f4b50261 | 57 | I2C_CLIENT_INSMOD_3(adm9240, ds1780, lm81); |
40b5cda2 GC |
58 | |
59 | /* ADM9240 registers */ | |
60 | #define ADM9240_REG_MAN_ID 0x3e | |
61 | #define ADM9240_REG_DIE_REV 0x3f | |
62 | #define ADM9240_REG_CONFIG 0x40 | |
63 | ||
64 | #define ADM9240_REG_IN(nr) (0x20 + (nr)) /* 0..5 */ | |
65 | #define ADM9240_REG_IN_MAX(nr) (0x2b + (nr) * 2) | |
66 | #define ADM9240_REG_IN_MIN(nr) (0x2c + (nr) * 2) | |
67 | #define ADM9240_REG_FAN(nr) (0x28 + (nr)) /* 0..1 */ | |
68 | #define ADM9240_REG_FAN_MIN(nr) (0x3b + (nr)) | |
69 | #define ADM9240_REG_INT(nr) (0x41 + (nr)) | |
70 | #define ADM9240_REG_INT_MASK(nr) (0x43 + (nr)) | |
71 | #define ADM9240_REG_TEMP 0x27 | |
72 | #define ADM9240_REG_TEMP_HIGH 0x39 | |
73 | #define ADM9240_REG_TEMP_HYST 0x3a | |
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 = { | |
140 | .owner = THIS_MODULE, | |
141 | .name = "adm9240", | |
142 | .id = I2C_DRIVERID_ADM9240, | |
143 | .flags = I2C_DF_NOTIFY, | |
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; | |
943b0830 | 152 | struct class_device *class_dev; |
40b5cda2 GC |
153 | struct semaphore update_lock; |
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 */ | |
165 | s8 temp_high; /* rw temp1_max */ | |
166 | s8 temp_hyst; /* rw temp1_max_hyst */ | |
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 | ||
173 | /* i2c byte read/write interface */ | |
174 | static int adm9240_read_value(struct i2c_client *client, u8 reg) | |
175 | { | |
176 | return i2c_smbus_read_byte_data(client, reg); | |
177 | } | |
178 | ||
179 | static int adm9240_write_value(struct i2c_client *client, u8 reg, u8 value) | |
180 | { | |
181 | return i2c_smbus_write_byte_data(client, reg, value); | |
182 | } | |
183 | ||
184 | /*** sysfs accessors ***/ | |
185 | ||
186 | /* temperature */ | |
187 | #define show_temp(value, scale) \ | |
6f637a64 GKH |
188 | static ssize_t show_##value(struct device *dev, \ |
189 | struct device_attribute *attr, \ | |
190 | char *buf) \ | |
40b5cda2 GC |
191 | { \ |
192 | struct adm9240_data *data = adm9240_update_device(dev); \ | |
193 | return sprintf(buf, "%d\n", data->value * scale); \ | |
194 | } | |
195 | show_temp(temp_high, 1000); | |
196 | show_temp(temp_hyst, 1000); | |
8e8f9289 | 197 | show_temp(temp, 500); /* 0.5'C per bit */ |
40b5cda2 GC |
198 | |
199 | #define set_temp(value, reg) \ | |
6f637a64 GKH |
200 | static ssize_t set_##value(struct device *dev, \ |
201 | struct device_attribute *attr, \ | |
202 | const char *buf, size_t count) \ | |
40b5cda2 GC |
203 | { \ |
204 | struct i2c_client *client = to_i2c_client(dev); \ | |
205 | struct adm9240_data *data = adm9240_update_device(dev); \ | |
206 | long temp = simple_strtoul(buf, NULL, 10); \ | |
207 | \ | |
208 | down(&data->update_lock); \ | |
209 | data->value = TEMP_TO_REG(temp); \ | |
210 | adm9240_write_value(client, reg, data->value); \ | |
211 | up(&data->update_lock); \ | |
212 | return count; \ | |
213 | } | |
214 | ||
215 | set_temp(temp_high, ADM9240_REG_TEMP_HIGH); | |
216 | set_temp(temp_hyst, ADM9240_REG_TEMP_HYST); | |
217 | ||
218 | static DEVICE_ATTR(temp1_max, S_IWUSR | S_IRUGO, | |
219 | show_temp_high, set_temp_high); | |
220 | static DEVICE_ATTR(temp1_max_hyst, S_IWUSR | S_IRUGO, | |
221 | show_temp_hyst, set_temp_hyst); | |
222 | static DEVICE_ATTR(temp1_input, S_IRUGO, show_temp, NULL); | |
223 | ||
224 | /* voltage */ | |
225 | static ssize_t show_in(struct device *dev, char *buf, int nr) | |
226 | { | |
227 | struct adm9240_data *data = adm9240_update_device(dev); | |
228 | return sprintf(buf, "%d\n", IN_FROM_REG(data->in[nr], nr)); | |
229 | } | |
230 | ||
231 | static ssize_t show_in_min(struct device *dev, char *buf, int nr) | |
232 | { | |
233 | struct adm9240_data *data = adm9240_update_device(dev); | |
234 | return sprintf(buf, "%d\n", IN_FROM_REG(data->in_min[nr], nr)); | |
235 | } | |
236 | ||
237 | static ssize_t show_in_max(struct device *dev, char *buf, int nr) | |
238 | { | |
239 | struct adm9240_data *data = adm9240_update_device(dev); | |
240 | return sprintf(buf, "%d\n", IN_FROM_REG(data->in_max[nr], nr)); | |
241 | } | |
242 | ||
243 | static ssize_t set_in_min(struct device *dev, const char *buf, | |
244 | size_t count, int nr) | |
245 | { | |
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); | |
251 | data->in_min[nr] = IN_TO_REG(val, nr); | |
252 | adm9240_write_value(client, ADM9240_REG_IN_MIN(nr), data->in_min[nr]); | |
253 | up(&data->update_lock); | |
254 | return count; | |
255 | } | |
256 | ||
257 | static ssize_t set_in_max(struct device *dev, const char *buf, | |
258 | size_t count, int nr) | |
259 | { | |
260 | struct i2c_client *client = to_i2c_client(dev); | |
261 | struct adm9240_data *data = i2c_get_clientdata(client); | |
262 | unsigned long val = simple_strtoul(buf, NULL, 10); | |
263 | ||
264 | down(&data->update_lock); | |
265 | data->in_max[nr] = IN_TO_REG(val, nr); | |
266 | adm9240_write_value(client, ADM9240_REG_IN_MAX(nr), data->in_max[nr]); | |
267 | up(&data->update_lock); | |
268 | return count; | |
269 | } | |
270 | ||
271 | #define show_in_offset(offset) \ | |
6f637a64 GKH |
272 | static ssize_t show_in##offset(struct device *dev, \ |
273 | struct device_attribute *attr, \ | |
274 | char *buf) \ | |
40b5cda2 GC |
275 | { \ |
276 | return show_in(dev, buf, offset); \ | |
277 | } \ | |
278 | static DEVICE_ATTR(in##offset##_input, S_IRUGO, show_in##offset, NULL); \ | |
6f637a64 GKH |
279 | static ssize_t show_in##offset##_min(struct device *dev, \ |
280 | struct device_attribute *attr, \ | |
281 | char *buf) \ | |
40b5cda2 GC |
282 | { \ |
283 | return show_in_min(dev, buf, offset); \ | |
284 | } \ | |
6f637a64 GKH |
285 | static ssize_t show_in##offset##_max(struct device *dev, \ |
286 | struct device_attribute *attr, \ | |
287 | char *buf) \ | |
40b5cda2 GC |
288 | { \ |
289 | return show_in_max(dev, buf, offset); \ | |
290 | } \ | |
291 | static ssize_t \ | |
6f637a64 GKH |
292 | set_in##offset##_min(struct device *dev, \ |
293 | struct device_attribute *attr, const char *buf, \ | |
294 | size_t count) \ | |
40b5cda2 GC |
295 | { \ |
296 | return set_in_min(dev, buf, count, offset); \ | |
297 | } \ | |
298 | static ssize_t \ | |
6f637a64 GKH |
299 | set_in##offset##_max(struct device *dev, \ |
300 | struct device_attribute *attr, const char *buf, \ | |
301 | size_t count) \ | |
40b5cda2 GC |
302 | { \ |
303 | return set_in_max(dev, buf, count, offset); \ | |
304 | } \ | |
305 | static DEVICE_ATTR(in##offset##_min, S_IRUGO | S_IWUSR, \ | |
306 | show_in##offset##_min, set_in##offset##_min); \ | |
307 | static DEVICE_ATTR(in##offset##_max, S_IRUGO | S_IWUSR, \ | |
308 | show_in##offset##_max, set_in##offset##_max); | |
309 | ||
310 | show_in_offset(0); | |
311 | show_in_offset(1); | |
312 | show_in_offset(2); | |
313 | show_in_offset(3); | |
314 | show_in_offset(4); | |
315 | show_in_offset(5); | |
316 | ||
317 | /* fans */ | |
318 | static ssize_t show_fan(struct device *dev, char *buf, int nr) | |
319 | { | |
320 | struct adm9240_data *data = adm9240_update_device(dev); | |
321 | return sprintf(buf, "%d\n", FAN_FROM_REG(data->fan[nr], | |
322 | 1 << data->fan_div[nr])); | |
323 | } | |
324 | ||
325 | static ssize_t show_fan_min(struct device *dev, char *buf, int nr) | |
326 | { | |
327 | struct adm9240_data *data = adm9240_update_device(dev); | |
328 | return sprintf(buf, "%d\n", FAN_FROM_REG(data->fan_min[nr], | |
329 | 1 << data->fan_div[nr])); | |
330 | } | |
331 | ||
332 | static ssize_t show_fan_div(struct device *dev, char *buf, int nr) | |
333 | { | |
334 | struct adm9240_data *data = adm9240_update_device(dev); | |
335 | return sprintf(buf, "%d\n", 1 << data->fan_div[nr]); | |
336 | } | |
337 | ||
338 | /* write new fan div, callers must hold data->update_lock */ | |
339 | static void adm9240_write_fan_div(struct i2c_client *client, int nr, | |
340 | u8 fan_div) | |
341 | { | |
342 | u8 reg, old, shift = (nr + 2) * 2; | |
343 | ||
344 | reg = adm9240_read_value(client, ADM9240_REG_VID_FAN_DIV); | |
345 | old = (reg >> shift) & 3; | |
346 | reg &= ~(3 << shift); | |
347 | reg |= (fan_div << shift); | |
348 | adm9240_write_value(client, ADM9240_REG_VID_FAN_DIV, reg); | |
349 | dev_dbg(&client->dev, "fan%d clock divider changed from %u " | |
350 | "to %u\n", nr + 1, 1 << old, 1 << fan_div); | |
351 | } | |
352 | ||
353 | /* | |
354 | * set fan speed low limit: | |
355 | * | |
356 | * - value is zero: disable fan speed low limit alarm | |
357 | * | |
358 | * - value is below fan speed measurement range: enable fan speed low | |
359 | * limit alarm to be asserted while fan speed too slow to measure | |
360 | * | |
361 | * - otherwise: select fan clock divider to suit fan speed low limit, | |
362 | * measurement code may adjust registers to ensure fan speed reading | |
363 | */ | |
364 | static ssize_t set_fan_min(struct device *dev, const char *buf, | |
365 | size_t count, int nr) | |
366 | { | |
367 | struct i2c_client *client = to_i2c_client(dev); | |
368 | struct adm9240_data *data = i2c_get_clientdata(client); | |
369 | unsigned long val = simple_strtoul(buf, NULL, 10); | |
370 | u8 new_div; | |
371 | ||
372 | down(&data->update_lock); | |
373 | ||
374 | if (!val) { | |
375 | data->fan_min[nr] = 255; | |
376 | new_div = data->fan_div[nr]; | |
377 | ||
378 | dev_dbg(&client->dev, "fan%u low limit set disabled\n", | |
379 | nr + 1); | |
380 | ||
381 | } else if (val < 1350000 / (8 * 254)) { | |
382 | new_div = 3; | |
383 | data->fan_min[nr] = 254; | |
384 | ||
385 | dev_dbg(&client->dev, "fan%u low limit set minimum %u\n", | |
386 | nr + 1, FAN_FROM_REG(254, 1 << new_div)); | |
387 | ||
388 | } else { | |
389 | unsigned int new_min = 1350000 / val; | |
390 | ||
391 | new_div = 0; | |
392 | while (new_min > 192 && new_div < 3) { | |
393 | new_div++; | |
394 | new_min /= 2; | |
395 | } | |
396 | if (!new_min) /* keep > 0 */ | |
397 | new_min++; | |
398 | ||
399 | data->fan_min[nr] = new_min; | |
400 | ||
401 | dev_dbg(&client->dev, "fan%u low limit set fan speed %u\n", | |
402 | nr + 1, FAN_FROM_REG(new_min, 1 << new_div)); | |
403 | } | |
404 | ||
405 | if (new_div != data->fan_div[nr]) { | |
406 | data->fan_div[nr] = new_div; | |
407 | adm9240_write_fan_div(client, nr, new_div); | |
408 | } | |
409 | adm9240_write_value(client, ADM9240_REG_FAN_MIN(nr), | |
410 | data->fan_min[nr]); | |
411 | ||
412 | up(&data->update_lock); | |
413 | return count; | |
414 | } | |
415 | ||
416 | #define show_fan_offset(offset) \ | |
6f637a64 GKH |
417 | static ssize_t show_fan_##offset (struct device *dev, \ |
418 | struct device_attribute *attr, \ | |
419 | char *buf) \ | |
40b5cda2 GC |
420 | { \ |
421 | return show_fan(dev, buf, offset - 1); \ | |
422 | } \ | |
6f637a64 GKH |
423 | static ssize_t show_fan_##offset##_div (struct device *dev, \ |
424 | struct device_attribute *attr, \ | |
425 | char *buf) \ | |
40b5cda2 GC |
426 | { \ |
427 | return show_fan_div(dev, buf, offset - 1); \ | |
428 | } \ | |
6f637a64 GKH |
429 | static ssize_t show_fan_##offset##_min (struct device *dev, \ |
430 | struct device_attribute *attr, \ | |
431 | char *buf) \ | |
40b5cda2 GC |
432 | { \ |
433 | return show_fan_min(dev, buf, offset - 1); \ | |
434 | } \ | |
435 | static ssize_t set_fan_##offset##_min (struct device *dev, \ | |
6f637a64 GKH |
436 | struct device_attribute *attr, \ |
437 | const char *buf, size_t count) \ | |
40b5cda2 GC |
438 | { \ |
439 | return set_fan_min(dev, buf, count, offset - 1); \ | |
440 | } \ | |
441 | static DEVICE_ATTR(fan##offset##_input, S_IRUGO, \ | |
442 | show_fan_##offset, NULL); \ | |
443 | static DEVICE_ATTR(fan##offset##_div, S_IRUGO, \ | |
444 | show_fan_##offset##_div, NULL); \ | |
445 | static DEVICE_ATTR(fan##offset##_min, S_IRUGO | S_IWUSR, \ | |
446 | show_fan_##offset##_min, set_fan_##offset##_min); | |
447 | ||
448 | show_fan_offset(1); | |
449 | show_fan_offset(2); | |
450 | ||
451 | /* alarms */ | |
6f637a64 | 452 | static ssize_t show_alarms(struct device *dev, struct device_attribute *attr, char *buf) |
40b5cda2 GC |
453 | { |
454 | struct adm9240_data *data = adm9240_update_device(dev); | |
455 | return sprintf(buf, "%u\n", data->alarms); | |
456 | } | |
457 | static DEVICE_ATTR(alarms, S_IRUGO, show_alarms, NULL); | |
458 | ||
459 | /* vid */ | |
6f637a64 | 460 | static ssize_t show_vid(struct device *dev, struct device_attribute *attr, char *buf) |
40b5cda2 GC |
461 | { |
462 | struct adm9240_data *data = adm9240_update_device(dev); | |
463 | return sprintf(buf, "%d\n", vid_from_reg(data->vid, data->vrm)); | |
464 | } | |
465 | static DEVICE_ATTR(cpu0_vid, S_IRUGO, show_vid, NULL); | |
466 | ||
467 | /* analog output */ | |
6f637a64 | 468 | static ssize_t show_aout(struct device *dev, struct device_attribute *attr, char *buf) |
40b5cda2 GC |
469 | { |
470 | struct adm9240_data *data = adm9240_update_device(dev); | |
471 | return sprintf(buf, "%d\n", AOUT_FROM_REG(data->aout)); | |
472 | } | |
473 | ||
6f637a64 | 474 | static ssize_t set_aout(struct device *dev, struct device_attribute *attr, const char *buf, size_t count) |
40b5cda2 GC |
475 | { |
476 | struct i2c_client *client = to_i2c_client(dev); | |
477 | struct adm9240_data *data = i2c_get_clientdata(client); | |
478 | unsigned long val = simple_strtol(buf, NULL, 10); | |
479 | ||
480 | down(&data->update_lock); | |
481 | data->aout = AOUT_TO_REG(val); | |
482 | adm9240_write_value(client, ADM9240_REG_ANALOG_OUT, data->aout); | |
483 | up(&data->update_lock); | |
484 | return count; | |
485 | } | |
486 | static DEVICE_ATTR(aout_output, S_IRUGO | S_IWUSR, show_aout, set_aout); | |
487 | ||
488 | /* chassis_clear */ | |
6f637a64 | 489 | static ssize_t chassis_clear(struct device *dev, struct device_attribute *attr, const char *buf, size_t count) |
40b5cda2 GC |
490 | { |
491 | struct i2c_client *client = to_i2c_client(dev); | |
492 | unsigned long val = simple_strtol(buf, NULL, 10); | |
493 | ||
494 | if (val == 1) { | |
495 | adm9240_write_value(client, ADM9240_REG_CHASSIS_CLEAR, 0x80); | |
496 | dev_dbg(&client->dev, "chassis intrusion latch cleared\n"); | |
497 | } | |
498 | return count; | |
499 | } | |
500 | static DEVICE_ATTR(chassis_clear, S_IWUSR, NULL, chassis_clear); | |
501 | ||
502 | ||
503 | /*** sensor chip detect and driver install ***/ | |
504 | ||
505 | static int adm9240_detect(struct i2c_adapter *adapter, int address, int kind) | |
506 | { | |
507 | struct i2c_client *new_client; | |
508 | struct adm9240_data *data; | |
509 | int err = 0; | |
510 | const char *name = ""; | |
511 | u8 man_id, die_rev; | |
512 | ||
513 | if (!i2c_check_functionality(adapter, I2C_FUNC_SMBUS_BYTE_DATA)) | |
514 | goto exit; | |
515 | ||
516 | if (!(data = kmalloc(sizeof(struct adm9240_data), GFP_KERNEL))) { | |
517 | err = -ENOMEM; | |
518 | goto exit; | |
519 | } | |
520 | memset(data, 0, sizeof(struct adm9240_data)); | |
521 | ||
522 | new_client = &data->client; | |
523 | i2c_set_clientdata(new_client, data); | |
524 | new_client->addr = address; | |
525 | new_client->adapter = adapter; | |
526 | new_client->driver = &adm9240_driver; | |
527 | new_client->flags = 0; | |
528 | ||
529 | if (kind == 0) { | |
530 | kind = adm9240; | |
531 | } | |
532 | ||
533 | if (kind < 0) { | |
534 | ||
535 | /* verify chip: reg address should match i2c address */ | |
536 | if (adm9240_read_value(new_client, ADM9240_REG_I2C_ADDR) | |
537 | != address) { | |
538 | dev_err(&adapter->dev, "detect fail: address match, " | |
539 | "0x%02x\n", address); | |
540 | goto exit_free; | |
541 | } | |
542 | ||
543 | /* check known chip manufacturer */ | |
544 | man_id = adm9240_read_value(new_client, ADM9240_REG_MAN_ID); | |
545 | ||
546 | if (man_id == 0x23) { | |
547 | kind = adm9240; | |
548 | } else if (man_id == 0xda) { | |
549 | kind = ds1780; | |
550 | } else if (man_id == 0x01) { | |
551 | kind = lm81; | |
552 | } else { | |
553 | dev_err(&adapter->dev, "detect fail: unknown manuf, " | |
554 | "0x%02x\n", man_id); | |
555 | goto exit_free; | |
556 | } | |
557 | ||
558 | /* successful detect, print chip info */ | |
559 | die_rev = adm9240_read_value(new_client, ADM9240_REG_DIE_REV); | |
560 | dev_info(&adapter->dev, "found %s revision %u\n", | |
561 | man_id == 0x23 ? "ADM9240" : | |
562 | man_id == 0xda ? "DS1780" : "LM81", die_rev); | |
563 | } | |
564 | ||
565 | /* either forced or detected chip kind */ | |
566 | if (kind == adm9240) { | |
567 | name = "adm9240"; | |
568 | } else if (kind == ds1780) { | |
569 | name = "ds1780"; | |
570 | } else if (kind == lm81) { | |
571 | name = "lm81"; | |
572 | } | |
573 | ||
574 | /* fill in the remaining client fields and attach */ | |
575 | strlcpy(new_client->name, name, I2C_NAME_SIZE); | |
576 | data->type = kind; | |
577 | init_MUTEX(&data->update_lock); | |
578 | ||
579 | if ((err = i2c_attach_client(new_client))) | |
580 | goto exit_free; | |
581 | ||
582 | adm9240_init_client(new_client); | |
583 | ||
584 | /* populate sysfs filesystem */ | |
943b0830 MH |
585 | data->class_dev = hwmon_device_register(&new_client->dev); |
586 | if (IS_ERR(data->class_dev)) { | |
587 | err = PTR_ERR(data->class_dev); | |
588 | goto exit_detach; | |
589 | } | |
590 | ||
40b5cda2 GC |
591 | device_create_file(&new_client->dev, &dev_attr_in0_input); |
592 | device_create_file(&new_client->dev, &dev_attr_in0_min); | |
593 | device_create_file(&new_client->dev, &dev_attr_in0_max); | |
594 | device_create_file(&new_client->dev, &dev_attr_in1_input); | |
595 | device_create_file(&new_client->dev, &dev_attr_in1_min); | |
596 | device_create_file(&new_client->dev, &dev_attr_in1_max); | |
597 | device_create_file(&new_client->dev, &dev_attr_in2_input); | |
598 | device_create_file(&new_client->dev, &dev_attr_in2_min); | |
599 | device_create_file(&new_client->dev, &dev_attr_in2_max); | |
600 | device_create_file(&new_client->dev, &dev_attr_in3_input); | |
601 | device_create_file(&new_client->dev, &dev_attr_in3_min); | |
602 | device_create_file(&new_client->dev, &dev_attr_in3_max); | |
603 | device_create_file(&new_client->dev, &dev_attr_in4_input); | |
604 | device_create_file(&new_client->dev, &dev_attr_in4_min); | |
605 | device_create_file(&new_client->dev, &dev_attr_in4_max); | |
606 | device_create_file(&new_client->dev, &dev_attr_in5_input); | |
607 | device_create_file(&new_client->dev, &dev_attr_in5_min); | |
608 | device_create_file(&new_client->dev, &dev_attr_in5_max); | |
609 | device_create_file(&new_client->dev, &dev_attr_temp1_max); | |
610 | device_create_file(&new_client->dev, &dev_attr_temp1_max_hyst); | |
611 | device_create_file(&new_client->dev, &dev_attr_temp1_input); | |
612 | device_create_file(&new_client->dev, &dev_attr_fan1_input); | |
613 | device_create_file(&new_client->dev, &dev_attr_fan1_div); | |
614 | device_create_file(&new_client->dev, &dev_attr_fan1_min); | |
615 | device_create_file(&new_client->dev, &dev_attr_fan2_input); | |
616 | device_create_file(&new_client->dev, &dev_attr_fan2_div); | |
617 | device_create_file(&new_client->dev, &dev_attr_fan2_min); | |
618 | device_create_file(&new_client->dev, &dev_attr_alarms); | |
619 | device_create_file(&new_client->dev, &dev_attr_aout_output); | |
620 | device_create_file(&new_client->dev, &dev_attr_chassis_clear); | |
621 | device_create_file(&new_client->dev, &dev_attr_cpu0_vid); | |
622 | ||
623 | return 0; | |
943b0830 MH |
624 | |
625 | exit_detach: | |
626 | i2c_detach_client(new_client); | |
40b5cda2 | 627 | exit_free: |
1f57ff89 | 628 | kfree(data); |
40b5cda2 GC |
629 | exit: |
630 | return err; | |
631 | } | |
632 | ||
633 | static int adm9240_attach_adapter(struct i2c_adapter *adapter) | |
634 | { | |
635 | if (!(adapter->class & I2C_CLASS_HWMON)) | |
636 | return 0; | |
2ed2dc3c | 637 | return i2c_probe(adapter, &addr_data, adm9240_detect); |
40b5cda2 GC |
638 | } |
639 | ||
640 | static int adm9240_detach_client(struct i2c_client *client) | |
641 | { | |
943b0830 | 642 | struct adm9240_data *data = i2c_get_clientdata(client); |
40b5cda2 GC |
643 | int err; |
644 | ||
943b0830 MH |
645 | hwmon_device_unregister(data->class_dev); |
646 | ||
7bef5594 | 647 | if ((err = i2c_detach_client(client))) |
40b5cda2 | 648 | return err; |
40b5cda2 | 649 | |
943b0830 | 650 | kfree(data); |
40b5cda2 GC |
651 | return 0; |
652 | } | |
653 | ||
654 | static void adm9240_init_client(struct i2c_client *client) | |
655 | { | |
656 | struct adm9240_data *data = i2c_get_clientdata(client); | |
657 | u8 conf = adm9240_read_value(client, ADM9240_REG_CONFIG); | |
658 | u8 mode = adm9240_read_value(client, ADM9240_REG_TEMP_CONF) & 3; | |
659 | ||
660 | data->vrm = i2c_which_vrm(); /* need this to report vid as mV */ | |
661 | ||
8e8f9289 GC |
662 | dev_info(&client->dev, "Using VRM: %d.%d\n", data->vrm / 10, |
663 | data->vrm % 10); | |
664 | ||
40b5cda2 GC |
665 | if (conf & 1) { /* measurement cycle running: report state */ |
666 | ||
667 | dev_info(&client->dev, "status: config 0x%02x mode %u\n", | |
668 | conf, mode); | |
669 | ||
670 | } else { /* cold start: open limits before starting chip */ | |
671 | int i; | |
672 | ||
673 | for (i = 0; i < 6; i++) | |
674 | { | |
675 | adm9240_write_value(client, | |
676 | ADM9240_REG_IN_MIN(i), 0); | |
677 | adm9240_write_value(client, | |
678 | ADM9240_REG_IN_MAX(i), 255); | |
679 | } | |
680 | adm9240_write_value(client, ADM9240_REG_FAN_MIN(0), 255); | |
681 | adm9240_write_value(client, ADM9240_REG_FAN_MIN(1), 255); | |
682 | adm9240_write_value(client, ADM9240_REG_TEMP_HIGH, 127); | |
683 | adm9240_write_value(client, ADM9240_REG_TEMP_HYST, 127); | |
684 | ||
685 | /* start measurement cycle */ | |
686 | adm9240_write_value(client, ADM9240_REG_CONFIG, 1); | |
687 | ||
688 | dev_info(&client->dev, "cold start: config was 0x%02x " | |
689 | "mode %u\n", conf, mode); | |
690 | } | |
691 | } | |
692 | ||
693 | static struct adm9240_data *adm9240_update_device(struct device *dev) | |
694 | { | |
695 | struct i2c_client *client = to_i2c_client(dev); | |
696 | struct adm9240_data *data = i2c_get_clientdata(client); | |
697 | int i; | |
698 | ||
699 | down(&data->update_lock); | |
700 | ||
701 | /* minimum measurement cycle: 1.75 seconds */ | |
702 | if (time_after(jiffies, data->last_updated_measure + (HZ * 7 / 4)) | |
703 | || !data->valid) { | |
704 | ||
705 | for (i = 0; i < 6; i++) /* read voltages */ | |
706 | { | |
707 | data->in[i] = adm9240_read_value(client, | |
708 | ADM9240_REG_IN(i)); | |
709 | } | |
710 | data->alarms = adm9240_read_value(client, | |
711 | ADM9240_REG_INT(0)) | | |
712 | adm9240_read_value(client, | |
713 | ADM9240_REG_INT(1)) << 8; | |
714 | ||
715 | /* read temperature: assume temperature changes less than | |
716 | * 0.5'C per two measurement cycles thus ignore possible | |
717 | * but unlikely aliasing error on lsb reading. --Grant */ | |
718 | data->temp = ((adm9240_read_value(client, | |
719 | ADM9240_REG_TEMP) << 8) | | |
720 | adm9240_read_value(client, | |
721 | ADM9240_REG_TEMP_CONF)) / 128; | |
722 | ||
723 | for (i = 0; i < 2; i++) /* read fans */ | |
724 | { | |
725 | data->fan[i] = adm9240_read_value(client, | |
726 | ADM9240_REG_FAN(i)); | |
727 | ||
728 | /* adjust fan clock divider on overflow */ | |
729 | if (data->valid && data->fan[i] == 255 && | |
730 | data->fan_div[i] < 3) { | |
731 | ||
732 | adm9240_write_fan_div(client, i, | |
733 | ++data->fan_div[i]); | |
734 | ||
735 | /* adjust fan_min if active, but not to 0 */ | |
736 | if (data->fan_min[i] < 255 && | |
737 | data->fan_min[i] >= 2) | |
738 | data->fan_min[i] /= 2; | |
739 | } | |
740 | } | |
741 | data->last_updated_measure = jiffies; | |
742 | } | |
743 | ||
744 | /* minimum config reading cycle: 300 seconds */ | |
745 | if (time_after(jiffies, data->last_updated_config + (HZ * 300)) | |
746 | || !data->valid) { | |
747 | ||
748 | for (i = 0; i < 6; i++) | |
749 | { | |
750 | data->in_min[i] = adm9240_read_value(client, | |
751 | ADM9240_REG_IN_MIN(i)); | |
752 | data->in_max[i] = adm9240_read_value(client, | |
753 | ADM9240_REG_IN_MAX(i)); | |
754 | } | |
755 | for (i = 0; i < 2; i++) | |
756 | { | |
757 | data->fan_min[i] = adm9240_read_value(client, | |
758 | ADM9240_REG_FAN_MIN(i)); | |
759 | } | |
760 | data->temp_high = adm9240_read_value(client, | |
761 | ADM9240_REG_TEMP_HIGH); | |
762 | data->temp_hyst = adm9240_read_value(client, | |
763 | ADM9240_REG_TEMP_HYST); | |
764 | ||
765 | /* read fan divs and 5-bit VID */ | |
766 | i = adm9240_read_value(client, ADM9240_REG_VID_FAN_DIV); | |
767 | data->fan_div[0] = (i >> 4) & 3; | |
768 | data->fan_div[1] = (i >> 6) & 3; | |
769 | data->vid = i & 0x0f; | |
770 | data->vid |= (adm9240_read_value(client, | |
771 | ADM9240_REG_VID4) & 1) << 4; | |
772 | /* read analog out */ | |
773 | data->aout = adm9240_read_value(client, | |
774 | ADM9240_REG_ANALOG_OUT); | |
775 | ||
776 | data->last_updated_config = jiffies; | |
777 | data->valid = 1; | |
778 | } | |
779 | up(&data->update_lock); | |
780 | return data; | |
781 | } | |
782 | ||
783 | static int __init sensors_adm9240_init(void) | |
784 | { | |
785 | return i2c_add_driver(&adm9240_driver); | |
786 | } | |
787 | ||
788 | static void __exit sensors_adm9240_exit(void) | |
789 | { | |
790 | i2c_del_driver(&adm9240_driver); | |
791 | } | |
792 | ||
793 | MODULE_AUTHOR("Michiel Rook <michiel@grendelproject.nl>, " | |
794 | "Grant Coady <gcoady@gmail.com> and others"); | |
795 | MODULE_DESCRIPTION("ADM9240/DS1780/LM81 driver"); | |
796 | MODULE_LICENSE("GPL"); | |
797 | ||
798 | module_init(sensors_adm9240_init); | |
799 | module_exit(sensors_adm9240_exit); | |
800 |