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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> | |
48 | #include <linux/i2c-sensor.h> | |
49 | #include <linux/i2c-vid.h> | |
50 | ||
51 | /* Addresses to scan */ | |
52 | static unsigned short normal_i2c[] = { 0x2c, 0x2d, 0x2e, 0x2f, | |
53 | I2C_CLIENT_END }; | |
54 | ||
55 | static unsigned int normal_isa[] = { I2C_CLIENT_ISA_END }; | |
56 | ||
57 | /* Insmod parameters */ | |
58 | SENSORS_INSMOD_3(adm9240, ds1780, lm81); | |
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 | |
73 | #define ADM9240_REG_TEMP_HIGH 0x39 | |
74 | #define ADM9240_REG_TEMP_HYST 0x3a | |
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 = { | |
141 | .owner = THIS_MODULE, | |
142 | .name = "adm9240", | |
143 | .id = I2C_DRIVERID_ADM9240, | |
144 | .flags = I2C_DF_NOTIFY, | |
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; | |
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 */ | |
168 | u8 aout; /* rw analog_out */ | |
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) \ | |
188 | static ssize_t show_##value(struct device *dev, char *buf) \ | |
189 | { \ | |
190 | struct adm9240_data *data = adm9240_update_device(dev); \ | |
191 | return sprintf(buf, "%d\n", data->value * scale); \ | |
192 | } | |
193 | show_temp(temp_high, 1000); | |
194 | show_temp(temp_hyst, 1000); | |
195 | show_temp(temp, 500); | |
196 | ||
197 | #define set_temp(value, reg) \ | |
198 | static ssize_t set_##value(struct device *dev, const char *buf, \ | |
199 | size_t count) \ | |
200 | { \ | |
201 | struct i2c_client *client = to_i2c_client(dev); \ | |
202 | struct adm9240_data *data = adm9240_update_device(dev); \ | |
203 | long temp = simple_strtoul(buf, NULL, 10); \ | |
204 | \ | |
205 | down(&data->update_lock); \ | |
206 | data->value = TEMP_TO_REG(temp); \ | |
207 | adm9240_write_value(client, reg, data->value); \ | |
208 | up(&data->update_lock); \ | |
209 | return count; \ | |
210 | } | |
211 | ||
212 | set_temp(temp_high, ADM9240_REG_TEMP_HIGH); | |
213 | set_temp(temp_hyst, ADM9240_REG_TEMP_HYST); | |
214 | ||
215 | static DEVICE_ATTR(temp1_max, S_IWUSR | S_IRUGO, | |
216 | show_temp_high, set_temp_high); | |
217 | static DEVICE_ATTR(temp1_max_hyst, S_IWUSR | S_IRUGO, | |
218 | show_temp_hyst, set_temp_hyst); | |
219 | static DEVICE_ATTR(temp1_input, S_IRUGO, show_temp, NULL); | |
220 | ||
221 | /* voltage */ | |
222 | static ssize_t show_in(struct device *dev, char *buf, int nr) | |
223 | { | |
224 | struct adm9240_data *data = adm9240_update_device(dev); | |
225 | return sprintf(buf, "%d\n", IN_FROM_REG(data->in[nr], nr)); | |
226 | } | |
227 | ||
228 | static ssize_t show_in_min(struct device *dev, char *buf, int nr) | |
229 | { | |
230 | struct adm9240_data *data = adm9240_update_device(dev); | |
231 | return sprintf(buf, "%d\n", IN_FROM_REG(data->in_min[nr], nr)); | |
232 | } | |
233 | ||
234 | static ssize_t show_in_max(struct device *dev, char *buf, int nr) | |
235 | { | |
236 | struct adm9240_data *data = adm9240_update_device(dev); | |
237 | return sprintf(buf, "%d\n", IN_FROM_REG(data->in_max[nr], nr)); | |
238 | } | |
239 | ||
240 | static ssize_t set_in_min(struct device *dev, const char *buf, | |
241 | size_t count, int nr) | |
242 | { | |
243 | struct i2c_client *client = to_i2c_client(dev); | |
244 | struct adm9240_data *data = i2c_get_clientdata(client); | |
245 | unsigned long val = simple_strtoul(buf, NULL, 10); | |
246 | ||
247 | down(&data->update_lock); | |
248 | data->in_min[nr] = IN_TO_REG(val, nr); | |
249 | adm9240_write_value(client, ADM9240_REG_IN_MIN(nr), data->in_min[nr]); | |
250 | up(&data->update_lock); | |
251 | return count; | |
252 | } | |
253 | ||
254 | static ssize_t set_in_max(struct device *dev, const char *buf, | |
255 | size_t count, int nr) | |
256 | { | |
257 | struct i2c_client *client = to_i2c_client(dev); | |
258 | struct adm9240_data *data = i2c_get_clientdata(client); | |
259 | unsigned long val = simple_strtoul(buf, NULL, 10); | |
260 | ||
261 | down(&data->update_lock); | |
262 | data->in_max[nr] = IN_TO_REG(val, nr); | |
263 | adm9240_write_value(client, ADM9240_REG_IN_MAX(nr), data->in_max[nr]); | |
264 | up(&data->update_lock); | |
265 | return count; | |
266 | } | |
267 | ||
268 | #define show_in_offset(offset) \ | |
269 | static ssize_t show_in##offset(struct device *dev, char *buf) \ | |
270 | { \ | |
271 | return show_in(dev, buf, offset); \ | |
272 | } \ | |
273 | static DEVICE_ATTR(in##offset##_input, S_IRUGO, show_in##offset, NULL); \ | |
274 | static ssize_t show_in##offset##_min(struct device *dev, char *buf) \ | |
275 | { \ | |
276 | return show_in_min(dev, buf, offset); \ | |
277 | } \ | |
278 | static ssize_t show_in##offset##_max(struct device *dev, char *buf) \ | |
279 | { \ | |
280 | return show_in_max(dev, buf, offset); \ | |
281 | } \ | |
282 | static ssize_t \ | |
283 | set_in##offset##_min(struct device *dev, const char *buf, size_t count) \ | |
284 | { \ | |
285 | return set_in_min(dev, buf, count, offset); \ | |
286 | } \ | |
287 | static ssize_t \ | |
288 | set_in##offset##_max(struct device *dev, const char *buf, size_t count) \ | |
289 | { \ | |
290 | return set_in_max(dev, buf, count, offset); \ | |
291 | } \ | |
292 | static DEVICE_ATTR(in##offset##_min, S_IRUGO | S_IWUSR, \ | |
293 | show_in##offset##_min, set_in##offset##_min); \ | |
294 | static DEVICE_ATTR(in##offset##_max, S_IRUGO | S_IWUSR, \ | |
295 | show_in##offset##_max, set_in##offset##_max); | |
296 | ||
297 | show_in_offset(0); | |
298 | show_in_offset(1); | |
299 | show_in_offset(2); | |
300 | show_in_offset(3); | |
301 | show_in_offset(4); | |
302 | show_in_offset(5); | |
303 | ||
304 | /* fans */ | |
305 | static ssize_t show_fan(struct device *dev, char *buf, int nr) | |
306 | { | |
307 | struct adm9240_data *data = adm9240_update_device(dev); | |
308 | return sprintf(buf, "%d\n", FAN_FROM_REG(data->fan[nr], | |
309 | 1 << data->fan_div[nr])); | |
310 | } | |
311 | ||
312 | static ssize_t show_fan_min(struct device *dev, char *buf, int nr) | |
313 | { | |
314 | struct adm9240_data *data = adm9240_update_device(dev); | |
315 | return sprintf(buf, "%d\n", FAN_FROM_REG(data->fan_min[nr], | |
316 | 1 << data->fan_div[nr])); | |
317 | } | |
318 | ||
319 | static ssize_t show_fan_div(struct device *dev, char *buf, int nr) | |
320 | { | |
321 | struct adm9240_data *data = adm9240_update_device(dev); | |
322 | return sprintf(buf, "%d\n", 1 << data->fan_div[nr]); | |
323 | } | |
324 | ||
325 | /* write new fan div, callers must hold data->update_lock */ | |
326 | static void adm9240_write_fan_div(struct i2c_client *client, int nr, | |
327 | u8 fan_div) | |
328 | { | |
329 | u8 reg, old, shift = (nr + 2) * 2; | |
330 | ||
331 | reg = adm9240_read_value(client, ADM9240_REG_VID_FAN_DIV); | |
332 | old = (reg >> shift) & 3; | |
333 | reg &= ~(3 << shift); | |
334 | reg |= (fan_div << shift); | |
335 | adm9240_write_value(client, ADM9240_REG_VID_FAN_DIV, reg); | |
336 | dev_dbg(&client->dev, "fan%d clock divider changed from %u " | |
337 | "to %u\n", nr + 1, 1 << old, 1 << fan_div); | |
338 | } | |
339 | ||
340 | /* | |
341 | * set fan speed low limit: | |
342 | * | |
343 | * - value is zero: disable fan speed low limit alarm | |
344 | * | |
345 | * - value is below fan speed measurement range: enable fan speed low | |
346 | * limit alarm to be asserted while fan speed too slow to measure | |
347 | * | |
348 | * - otherwise: select fan clock divider to suit fan speed low limit, | |
349 | * measurement code may adjust registers to ensure fan speed reading | |
350 | */ | |
351 | static ssize_t set_fan_min(struct device *dev, const char *buf, | |
352 | size_t count, int nr) | |
353 | { | |
354 | struct i2c_client *client = to_i2c_client(dev); | |
355 | struct adm9240_data *data = i2c_get_clientdata(client); | |
356 | unsigned long val = simple_strtoul(buf, NULL, 10); | |
357 | u8 new_div; | |
358 | ||
359 | down(&data->update_lock); | |
360 | ||
361 | if (!val) { | |
362 | data->fan_min[nr] = 255; | |
363 | new_div = data->fan_div[nr]; | |
364 | ||
365 | dev_dbg(&client->dev, "fan%u low limit set disabled\n", | |
366 | nr + 1); | |
367 | ||
368 | } else if (val < 1350000 / (8 * 254)) { | |
369 | new_div = 3; | |
370 | data->fan_min[nr] = 254; | |
371 | ||
372 | dev_dbg(&client->dev, "fan%u low limit set minimum %u\n", | |
373 | nr + 1, FAN_FROM_REG(254, 1 << new_div)); | |
374 | ||
375 | } else { | |
376 | unsigned int new_min = 1350000 / val; | |
377 | ||
378 | new_div = 0; | |
379 | while (new_min > 192 && new_div < 3) { | |
380 | new_div++; | |
381 | new_min /= 2; | |
382 | } | |
383 | if (!new_min) /* keep > 0 */ | |
384 | new_min++; | |
385 | ||
386 | data->fan_min[nr] = new_min; | |
387 | ||
388 | dev_dbg(&client->dev, "fan%u low limit set fan speed %u\n", | |
389 | nr + 1, FAN_FROM_REG(new_min, 1 << new_div)); | |
390 | } | |
391 | ||
392 | if (new_div != data->fan_div[nr]) { | |
393 | data->fan_div[nr] = new_div; | |
394 | adm9240_write_fan_div(client, nr, new_div); | |
395 | } | |
396 | adm9240_write_value(client, ADM9240_REG_FAN_MIN(nr), | |
397 | data->fan_min[nr]); | |
398 | ||
399 | up(&data->update_lock); | |
400 | return count; | |
401 | } | |
402 | ||
403 | #define show_fan_offset(offset) \ | |
404 | static ssize_t show_fan_##offset (struct device *dev, char *buf) \ | |
405 | { \ | |
406 | return show_fan(dev, buf, offset - 1); \ | |
407 | } \ | |
408 | static ssize_t show_fan_##offset##_div (struct device *dev, char *buf) \ | |
409 | { \ | |
410 | return show_fan_div(dev, buf, offset - 1); \ | |
411 | } \ | |
412 | static ssize_t show_fan_##offset##_min (struct device *dev, char *buf) \ | |
413 | { \ | |
414 | return show_fan_min(dev, buf, offset - 1); \ | |
415 | } \ | |
416 | static ssize_t set_fan_##offset##_min (struct device *dev, \ | |
417 | const char *buf, size_t count) \ | |
418 | { \ | |
419 | return set_fan_min(dev, buf, count, offset - 1); \ | |
420 | } \ | |
421 | static DEVICE_ATTR(fan##offset##_input, S_IRUGO, \ | |
422 | show_fan_##offset, NULL); \ | |
423 | static DEVICE_ATTR(fan##offset##_div, S_IRUGO, \ | |
424 | show_fan_##offset##_div, NULL); \ | |
425 | static DEVICE_ATTR(fan##offset##_min, S_IRUGO | S_IWUSR, \ | |
426 | show_fan_##offset##_min, set_fan_##offset##_min); | |
427 | ||
428 | show_fan_offset(1); | |
429 | show_fan_offset(2); | |
430 | ||
431 | /* alarms */ | |
432 | static ssize_t show_alarms(struct device *dev, char *buf) | |
433 | { | |
434 | struct adm9240_data *data = adm9240_update_device(dev); | |
435 | return sprintf(buf, "%u\n", data->alarms); | |
436 | } | |
437 | static DEVICE_ATTR(alarms, S_IRUGO, show_alarms, NULL); | |
438 | ||
439 | /* vid */ | |
440 | static ssize_t show_vid(struct device *dev, char *buf) | |
441 | { | |
442 | struct adm9240_data *data = adm9240_update_device(dev); | |
443 | return sprintf(buf, "%d\n", vid_from_reg(data->vid, data->vrm)); | |
444 | } | |
445 | static DEVICE_ATTR(cpu0_vid, S_IRUGO, show_vid, NULL); | |
446 | ||
447 | /* analog output */ | |
448 | static ssize_t show_aout(struct device *dev, char *buf) | |
449 | { | |
450 | struct adm9240_data *data = adm9240_update_device(dev); | |
451 | return sprintf(buf, "%d\n", AOUT_FROM_REG(data->aout)); | |
452 | } | |
453 | ||
454 | static ssize_t set_aout(struct device *dev, const char *buf, size_t count) | |
455 | { | |
456 | struct i2c_client *client = to_i2c_client(dev); | |
457 | struct adm9240_data *data = i2c_get_clientdata(client); | |
458 | unsigned long val = simple_strtol(buf, NULL, 10); | |
459 | ||
460 | down(&data->update_lock); | |
461 | data->aout = AOUT_TO_REG(val); | |
462 | adm9240_write_value(client, ADM9240_REG_ANALOG_OUT, data->aout); | |
463 | up(&data->update_lock); | |
464 | return count; | |
465 | } | |
466 | static DEVICE_ATTR(aout_output, S_IRUGO | S_IWUSR, show_aout, set_aout); | |
467 | ||
468 | /* chassis_clear */ | |
469 | static ssize_t chassis_clear(struct device *dev, const char *buf, size_t count) | |
470 | { | |
471 | struct i2c_client *client = to_i2c_client(dev); | |
472 | unsigned long val = simple_strtol(buf, NULL, 10); | |
473 | ||
474 | if (val == 1) { | |
475 | adm9240_write_value(client, ADM9240_REG_CHASSIS_CLEAR, 0x80); | |
476 | dev_dbg(&client->dev, "chassis intrusion latch cleared\n"); | |
477 | } | |
478 | return count; | |
479 | } | |
480 | static DEVICE_ATTR(chassis_clear, S_IWUSR, NULL, chassis_clear); | |
481 | ||
482 | ||
483 | /*** sensor chip detect and driver install ***/ | |
484 | ||
485 | static int adm9240_detect(struct i2c_adapter *adapter, int address, int kind) | |
486 | { | |
487 | struct i2c_client *new_client; | |
488 | struct adm9240_data *data; | |
489 | int err = 0; | |
490 | const char *name = ""; | |
491 | u8 man_id, die_rev; | |
492 | ||
493 | if (!i2c_check_functionality(adapter, I2C_FUNC_SMBUS_BYTE_DATA)) | |
494 | goto exit; | |
495 | ||
496 | if (!(data = kmalloc(sizeof(struct adm9240_data), GFP_KERNEL))) { | |
497 | err = -ENOMEM; | |
498 | goto exit; | |
499 | } | |
500 | memset(data, 0, sizeof(struct adm9240_data)); | |
501 | ||
502 | new_client = &data->client; | |
503 | i2c_set_clientdata(new_client, data); | |
504 | new_client->addr = address; | |
505 | new_client->adapter = adapter; | |
506 | new_client->driver = &adm9240_driver; | |
507 | new_client->flags = 0; | |
508 | ||
509 | if (kind == 0) { | |
510 | kind = adm9240; | |
511 | } | |
512 | ||
513 | if (kind < 0) { | |
514 | ||
515 | /* verify chip: reg address should match i2c address */ | |
516 | if (adm9240_read_value(new_client, ADM9240_REG_I2C_ADDR) | |
517 | != address) { | |
518 | dev_err(&adapter->dev, "detect fail: address match, " | |
519 | "0x%02x\n", address); | |
520 | goto exit_free; | |
521 | } | |
522 | ||
523 | /* check known chip manufacturer */ | |
524 | man_id = adm9240_read_value(new_client, ADM9240_REG_MAN_ID); | |
525 | ||
526 | if (man_id == 0x23) { | |
527 | kind = adm9240; | |
528 | } else if (man_id == 0xda) { | |
529 | kind = ds1780; | |
530 | } else if (man_id == 0x01) { | |
531 | kind = lm81; | |
532 | } else { | |
533 | dev_err(&adapter->dev, "detect fail: unknown manuf, " | |
534 | "0x%02x\n", man_id); | |
535 | goto exit_free; | |
536 | } | |
537 | ||
538 | /* successful detect, print chip info */ | |
539 | die_rev = adm9240_read_value(new_client, ADM9240_REG_DIE_REV); | |
540 | dev_info(&adapter->dev, "found %s revision %u\n", | |
541 | man_id == 0x23 ? "ADM9240" : | |
542 | man_id == 0xda ? "DS1780" : "LM81", die_rev); | |
543 | } | |
544 | ||
545 | /* either forced or detected chip kind */ | |
546 | if (kind == adm9240) { | |
547 | name = "adm9240"; | |
548 | } else if (kind == ds1780) { | |
549 | name = "ds1780"; | |
550 | } else if (kind == lm81) { | |
551 | name = "lm81"; | |
552 | } | |
553 | ||
554 | /* fill in the remaining client fields and attach */ | |
555 | strlcpy(new_client->name, name, I2C_NAME_SIZE); | |
556 | data->type = kind; | |
557 | init_MUTEX(&data->update_lock); | |
558 | ||
559 | if ((err = i2c_attach_client(new_client))) | |
560 | goto exit_free; | |
561 | ||
562 | adm9240_init_client(new_client); | |
563 | ||
564 | /* populate sysfs filesystem */ | |
565 | device_create_file(&new_client->dev, &dev_attr_in0_input); | |
566 | device_create_file(&new_client->dev, &dev_attr_in0_min); | |
567 | device_create_file(&new_client->dev, &dev_attr_in0_max); | |
568 | device_create_file(&new_client->dev, &dev_attr_in1_input); | |
569 | device_create_file(&new_client->dev, &dev_attr_in1_min); | |
570 | device_create_file(&new_client->dev, &dev_attr_in1_max); | |
571 | device_create_file(&new_client->dev, &dev_attr_in2_input); | |
572 | device_create_file(&new_client->dev, &dev_attr_in2_min); | |
573 | device_create_file(&new_client->dev, &dev_attr_in2_max); | |
574 | device_create_file(&new_client->dev, &dev_attr_in3_input); | |
575 | device_create_file(&new_client->dev, &dev_attr_in3_min); | |
576 | device_create_file(&new_client->dev, &dev_attr_in3_max); | |
577 | device_create_file(&new_client->dev, &dev_attr_in4_input); | |
578 | device_create_file(&new_client->dev, &dev_attr_in4_min); | |
579 | device_create_file(&new_client->dev, &dev_attr_in4_max); | |
580 | device_create_file(&new_client->dev, &dev_attr_in5_input); | |
581 | device_create_file(&new_client->dev, &dev_attr_in5_min); | |
582 | device_create_file(&new_client->dev, &dev_attr_in5_max); | |
583 | device_create_file(&new_client->dev, &dev_attr_temp1_max); | |
584 | device_create_file(&new_client->dev, &dev_attr_temp1_max_hyst); | |
585 | device_create_file(&new_client->dev, &dev_attr_temp1_input); | |
586 | device_create_file(&new_client->dev, &dev_attr_fan1_input); | |
587 | device_create_file(&new_client->dev, &dev_attr_fan1_div); | |
588 | device_create_file(&new_client->dev, &dev_attr_fan1_min); | |
589 | device_create_file(&new_client->dev, &dev_attr_fan2_input); | |
590 | device_create_file(&new_client->dev, &dev_attr_fan2_div); | |
591 | device_create_file(&new_client->dev, &dev_attr_fan2_min); | |
592 | device_create_file(&new_client->dev, &dev_attr_alarms); | |
593 | device_create_file(&new_client->dev, &dev_attr_aout_output); | |
594 | device_create_file(&new_client->dev, &dev_attr_chassis_clear); | |
595 | device_create_file(&new_client->dev, &dev_attr_cpu0_vid); | |
596 | ||
597 | return 0; | |
598 | exit_free: | |
599 | kfree(new_client); | |
600 | exit: | |
601 | return err; | |
602 | } | |
603 | ||
604 | static int adm9240_attach_adapter(struct i2c_adapter *adapter) | |
605 | { | |
606 | if (!(adapter->class & I2C_CLASS_HWMON)) | |
607 | return 0; | |
608 | return i2c_detect(adapter, &addr_data, adm9240_detect); | |
609 | } | |
610 | ||
611 | static int adm9240_detach_client(struct i2c_client *client) | |
612 | { | |
613 | int err; | |
614 | ||
615 | if ((err = i2c_detach_client(client))) { | |
616 | dev_err(&client->dev, "Client deregistration failed, " | |
617 | "client not detached.\n"); | |
618 | return err; | |
619 | } | |
620 | ||
621 | kfree(i2c_get_clientdata(client)); | |
622 | return 0; | |
623 | } | |
624 | ||
625 | static void adm9240_init_client(struct i2c_client *client) | |
626 | { | |
627 | struct adm9240_data *data = i2c_get_clientdata(client); | |
628 | u8 conf = adm9240_read_value(client, ADM9240_REG_CONFIG); | |
629 | u8 mode = adm9240_read_value(client, ADM9240_REG_TEMP_CONF) & 3; | |
630 | ||
631 | data->vrm = i2c_which_vrm(); /* need this to report vid as mV */ | |
632 | ||
633 | if (conf & 1) { /* measurement cycle running: report state */ | |
634 | ||
635 | dev_info(&client->dev, "status: config 0x%02x mode %u\n", | |
636 | conf, mode); | |
637 | ||
638 | } else { /* cold start: open limits before starting chip */ | |
639 | int i; | |
640 | ||
641 | for (i = 0; i < 6; i++) | |
642 | { | |
643 | adm9240_write_value(client, | |
644 | ADM9240_REG_IN_MIN(i), 0); | |
645 | adm9240_write_value(client, | |
646 | ADM9240_REG_IN_MAX(i), 255); | |
647 | } | |
648 | adm9240_write_value(client, ADM9240_REG_FAN_MIN(0), 255); | |
649 | adm9240_write_value(client, ADM9240_REG_FAN_MIN(1), 255); | |
650 | adm9240_write_value(client, ADM9240_REG_TEMP_HIGH, 127); | |
651 | adm9240_write_value(client, ADM9240_REG_TEMP_HYST, 127); | |
652 | ||
653 | /* start measurement cycle */ | |
654 | adm9240_write_value(client, ADM9240_REG_CONFIG, 1); | |
655 | ||
656 | dev_info(&client->dev, "cold start: config was 0x%02x " | |
657 | "mode %u\n", conf, mode); | |
658 | } | |
659 | } | |
660 | ||
661 | static struct adm9240_data *adm9240_update_device(struct device *dev) | |
662 | { | |
663 | struct i2c_client *client = to_i2c_client(dev); | |
664 | struct adm9240_data *data = i2c_get_clientdata(client); | |
665 | int i; | |
666 | ||
667 | down(&data->update_lock); | |
668 | ||
669 | /* minimum measurement cycle: 1.75 seconds */ | |
670 | if (time_after(jiffies, data->last_updated_measure + (HZ * 7 / 4)) | |
671 | || !data->valid) { | |
672 | ||
673 | for (i = 0; i < 6; i++) /* read voltages */ | |
674 | { | |
675 | data->in[i] = adm9240_read_value(client, | |
676 | ADM9240_REG_IN(i)); | |
677 | } | |
678 | data->alarms = adm9240_read_value(client, | |
679 | ADM9240_REG_INT(0)) | | |
680 | adm9240_read_value(client, | |
681 | ADM9240_REG_INT(1)) << 8; | |
682 | ||
683 | /* read temperature: assume temperature changes less than | |
684 | * 0.5'C per two measurement cycles thus ignore possible | |
685 | * but unlikely aliasing error on lsb reading. --Grant */ | |
686 | data->temp = ((adm9240_read_value(client, | |
687 | ADM9240_REG_TEMP) << 8) | | |
688 | adm9240_read_value(client, | |
689 | ADM9240_REG_TEMP_CONF)) / 128; | |
690 | ||
691 | for (i = 0; i < 2; i++) /* read fans */ | |
692 | { | |
693 | data->fan[i] = adm9240_read_value(client, | |
694 | ADM9240_REG_FAN(i)); | |
695 | ||
696 | /* adjust fan clock divider on overflow */ | |
697 | if (data->valid && data->fan[i] == 255 && | |
698 | data->fan_div[i] < 3) { | |
699 | ||
700 | adm9240_write_fan_div(client, i, | |
701 | ++data->fan_div[i]); | |
702 | ||
703 | /* adjust fan_min if active, but not to 0 */ | |
704 | if (data->fan_min[i] < 255 && | |
705 | data->fan_min[i] >= 2) | |
706 | data->fan_min[i] /= 2; | |
707 | } | |
708 | } | |
709 | data->last_updated_measure = jiffies; | |
710 | } | |
711 | ||
712 | /* minimum config reading cycle: 300 seconds */ | |
713 | if (time_after(jiffies, data->last_updated_config + (HZ * 300)) | |
714 | || !data->valid) { | |
715 | ||
716 | for (i = 0; i < 6; i++) | |
717 | { | |
718 | data->in_min[i] = adm9240_read_value(client, | |
719 | ADM9240_REG_IN_MIN(i)); | |
720 | data->in_max[i] = adm9240_read_value(client, | |
721 | ADM9240_REG_IN_MAX(i)); | |
722 | } | |
723 | for (i = 0; i < 2; i++) | |
724 | { | |
725 | data->fan_min[i] = adm9240_read_value(client, | |
726 | ADM9240_REG_FAN_MIN(i)); | |
727 | } | |
728 | data->temp_high = adm9240_read_value(client, | |
729 | ADM9240_REG_TEMP_HIGH); | |
730 | data->temp_hyst = adm9240_read_value(client, | |
731 | ADM9240_REG_TEMP_HYST); | |
732 | ||
733 | /* read fan divs and 5-bit VID */ | |
734 | i = adm9240_read_value(client, ADM9240_REG_VID_FAN_DIV); | |
735 | data->fan_div[0] = (i >> 4) & 3; | |
736 | data->fan_div[1] = (i >> 6) & 3; | |
737 | data->vid = i & 0x0f; | |
738 | data->vid |= (adm9240_read_value(client, | |
739 | ADM9240_REG_VID4) & 1) << 4; | |
740 | /* read analog out */ | |
741 | data->aout = adm9240_read_value(client, | |
742 | ADM9240_REG_ANALOG_OUT); | |
743 | ||
744 | data->last_updated_config = jiffies; | |
745 | data->valid = 1; | |
746 | } | |
747 | up(&data->update_lock); | |
748 | return data; | |
749 | } | |
750 | ||
751 | static int __init sensors_adm9240_init(void) | |
752 | { | |
753 | return i2c_add_driver(&adm9240_driver); | |
754 | } | |
755 | ||
756 | static void __exit sensors_adm9240_exit(void) | |
757 | { | |
758 | i2c_del_driver(&adm9240_driver); | |
759 | } | |
760 | ||
761 | MODULE_AUTHOR("Michiel Rook <michiel@grendelproject.nl>, " | |
762 | "Grant Coady <gcoady@gmail.com> and others"); | |
763 | MODULE_DESCRIPTION("ADM9240/DS1780/LM81 driver"); | |
764 | MODULE_LICENSE("GPL"); | |
765 | ||
766 | module_init(sensors_adm9240_init); | |
767 | module_exit(sensors_adm9240_exit); | |
768 |