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1 | /* |
2 | * lm87.c |
3 | * |
4 | * Copyright (C) 2000 Frodo Looijaard <frodol@dds.nl> |
5 | * Philip Edelbrock <phil@netroedge.com> |
6 | * Stephen Rousset <stephen.rousset@rocketlogix.com> |
7 | * Dan Eaton <dan.eaton@rocketlogix.com> |
8 | * Copyright (C) 2004-2008 Jean Delvare <khali@linux-fr.org> |
9 | * |
10 | * Original port to Linux 2.6 by Jeff Oliver. |
11 | * |
12 | * The LM87 is a sensor chip made by National Semiconductor. It monitors up |
13 | * to 8 voltages (including its own power source), up to three temperatures |
14 | * (its own plus up to two external ones) and up to two fans. The default |
15 | * configuration is 6 voltages, two temperatures and two fans (see below). |
16 | * Voltages are scaled internally with ratios such that the nominal value of |
17 | * each voltage correspond to a register value of 192 (which means a |
18 | * resolution of about 0.5% of the nominal value). Temperature values are |
19 | * reported with a 1 deg resolution and a 3-4 deg accuracy. Complete |
20 | * datasheet can be obtained from National's website at: |
21 | * http://www.national.com/pf/LM/LM87.html |
22 | * |
23 | * Some functions share pins, so not all functions are available at the same |
24 | * time. Which are depends on the hardware setup. This driver normally |
25 | * assumes that firmware configured the chip correctly. Where this is not |
26 | * the case, platform code must set the I2C client's platform_data to point |
27 | * to a u8 value to be written to the channel register. |
28 | * For reference, here is the list of exclusive functions: |
29 | * - in0+in5 (default) or temp3 |
30 | * - fan1 (default) or in6 |
31 | * - fan2 (default) or in7 |
32 | * - VID lines (default) or IRQ lines (not handled by this driver) |
33 | * |
34 | * The LM87 additionally features an analog output, supposedly usable to |
35 | * control the speed of a fan. All new chips use pulse width modulation |
36 | * instead. The LM87 is the only hardware monitoring chipset I know of |
37 | * which uses amplitude modulation. Be careful when using this feature. |
38 | * |
39 | * This driver also supports the ADM1024, a sensor chip made by Analog |
40 | * Devices. That chip is fully compatible with the LM87. Complete |
41 | * datasheet can be obtained from Analog's website at: |
42 | * http://www.analog.com/en/prod/0,2877,ADM1024,00.html |
43 | * |
44 | * This program is free software; you can redistribute it and/or modify |
45 | * it under the terms of the GNU General Public License as published by |
46 | * the Free Software Foundation; either version 2 of the License, or |
47 | * (at your option) any later version. |
48 | * |
49 | * This program is distributed in the hope that it will be useful, |
50 | * but WITHOUT ANY WARRANTY; without even the implied warranty of |
51 | * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the |
52 | * GNU General Public License for more details. |
53 | * |
54 | * You should have received a copy of the GNU General Public License |
55 | * along with this program; if not, write to the Free Software |
56 | * Foundation, Inc., 675 Mass Ave, Cambridge, MA 02139, USA. |
57 | */ |
58 | |
59 | #include <linux/module.h> |
60 | #include <linux/init.h> |
61 | #include <linux/slab.h> |
62 | #include <linux/jiffies.h> |
63 | #include <linux/i2c.h> |
64 | #include <linux/hwmon.h> |
65 | #include <linux/hwmon-sysfs.h> |
66 | #include <linux/hwmon-vid.h> |
67 | #include <linux/err.h> |
68 | #include <linux/mutex.h> |
69 | |
70 | /* |
71 | * Addresses to scan |
72 | * LM87 has three possible addresses: 0x2c, 0x2d and 0x2e. |
73 | */ |
74 | |
75 | static const unsigned short normal_i2c[] = { 0x2c, 0x2d, 0x2e, I2C_CLIENT_END }; |
76 | |
77 | enum chips { lm87, adm1024 }; |
78 | |
79 | /* |
80 | * The LM87 registers |
81 | */ |
82 | |
83 | /* nr in 0..5 */ |
84 | #define LM87_REG_IN(nr) (0x20 + (nr)) |
85 | #define LM87_REG_IN_MAX(nr) (0x2B + (nr) * 2) |
86 | #define LM87_REG_IN_MIN(nr) (0x2C + (nr) * 2) |
87 | /* nr in 0..1 */ |
88 | #define LM87_REG_AIN(nr) (0x28 + (nr)) |
89 | #define LM87_REG_AIN_MIN(nr) (0x1A + (nr)) |
90 | #define LM87_REG_AIN_MAX(nr) (0x3B + (nr)) |
91 | |
92 | static u8 LM87_REG_TEMP[3] = { 0x27, 0x26, 0x20 }; |
93 | static u8 LM87_REG_TEMP_HIGH[3] = { 0x39, 0x37, 0x2B }; |
94 | static u8 LM87_REG_TEMP_LOW[3] = { 0x3A, 0x38, 0x2C }; |
95 | |
96 | #define LM87_REG_TEMP_HW_INT_LOCK 0x13 |
97 | #define LM87_REG_TEMP_HW_EXT_LOCK 0x14 |
98 | #define LM87_REG_TEMP_HW_INT 0x17 |
99 | #define LM87_REG_TEMP_HW_EXT 0x18 |
100 | |
101 | /* nr in 0..1 */ |
102 | #define LM87_REG_FAN(nr) (0x28 + (nr)) |
103 | #define LM87_REG_FAN_MIN(nr) (0x3B + (nr)) |
104 | #define LM87_REG_AOUT 0x19 |
105 | |
106 | #define LM87_REG_CONFIG 0x40 |
107 | #define LM87_REG_CHANNEL_MODE 0x16 |
108 | #define LM87_REG_VID_FAN_DIV 0x47 |
109 | #define LM87_REG_VID4 0x49 |
110 | |
111 | #define LM87_REG_ALARMS1 0x41 |
112 | #define LM87_REG_ALARMS2 0x42 |
113 | |
114 | #define LM87_REG_COMPANY_ID 0x3E |
115 | #define LM87_REG_REVISION 0x3F |
116 | |
117 | /* |
118 | * Conversions and various macros |
119 | * The LM87 uses signed 8-bit values for temperatures. |
120 | */ |
121 | |
122 | #define IN_FROM_REG(reg, scale) (((reg) * (scale) + 96) / 192) |
123 | #define IN_TO_REG(val, scale) ((val) <= 0 ? 0 : \ |
124 | (val) * 192 >= (scale) * 255 ? 255 : \ |
125 | ((val) * 192 + (scale) / 2) / (scale)) |
126 | |
127 | #define TEMP_FROM_REG(reg) ((reg) * 1000) |
128 | #define TEMP_TO_REG(val) ((val) <= -127500 ? -128 : \ |
129 | (val) >= 126500 ? 127 : \ |
130 | (((val) < 0 ? (val) - 500 : \ |
131 | (val) + 500) / 1000)) |
132 | |
133 | #define FAN_FROM_REG(reg, div) ((reg) == 255 || (reg) == 0 ? 0 : \ |
134 | (1350000 + (reg)*(div) / 2) / ((reg) * (div))) |
135 | #define FAN_TO_REG(val, div) ((val) * (div) * 255 <= 1350000 ? 255 : \ |
136 | (1350000 + (val)*(div) / 2) / ((val) * (div))) |
137 | |
138 | #define FAN_DIV_FROM_REG(reg) (1 << (reg)) |
139 | |
140 | /* analog out is 9.80mV/LSB */ |
141 | #define AOUT_FROM_REG(reg) (((reg) * 98 + 5) / 10) |
142 | #define AOUT_TO_REG(val) ((val) <= 0 ? 0 : \ |
143 | (val) >= 2500 ? 255 : \ |
144 | ((val) * 10 + 49) / 98) |
145 | |
146 | /* nr in 0..1 */ |
147 | #define CHAN_NO_FAN(nr) (1 << (nr)) |
148 | #define CHAN_TEMP3 (1 << 2) |
149 | #define CHAN_VCC_5V (1 << 3) |
150 | #define CHAN_NO_VID (1 << 7) |
151 | |
152 | /* |
153 | * Client data (each client gets its own) |
154 | */ |
155 | |
156 | struct lm87_data { |
157 | struct device *hwmon_dev; |
158 | struct mutex update_lock; |
159 | char valid; /* zero until following fields are valid */ |
160 | unsigned long last_updated; /* In jiffies */ |
161 | |
162 | u8 channel; /* register value */ |
163 | u8 config; /* original register value */ |
164 | |
165 | u8 in[8]; /* register value */ |
166 | u8 in_max[8]; /* register value */ |
167 | u8 in_min[8]; /* register value */ |
168 | u16 in_scale[8]; |
169 | |
170 | s8 temp[3]; /* register value */ |
171 | s8 temp_high[3]; /* register value */ |
172 | s8 temp_low[3]; /* register value */ |
173 | s8 temp_crit_int; /* min of two register values */ |
174 | s8 temp_crit_ext; /* min of two register values */ |
175 | |
176 | u8 fan[2]; /* register value */ |
177 | u8 fan_min[2]; /* register value */ |
178 | u8 fan_div[2]; /* register value, shifted right */ |
179 | u8 aout; /* register value */ |
180 | |
181 | u16 alarms; /* register values, combined */ |
182 | u8 vid; /* register values, combined */ |
183 | u8 vrm; |
184 | }; |
185 | |
186 | static inline int lm87_read_value(struct i2c_client *client, u8 reg) |
187 | { |
188 | return i2c_smbus_read_byte_data(client, reg); |
189 | } |
190 | |
191 | static inline int lm87_write_value(struct i2c_client *client, u8 reg, u8 value) |
192 | { |
193 | return i2c_smbus_write_byte_data(client, reg, value); |
194 | } |
195 | |
196 | static struct lm87_data *lm87_update_device(struct device *dev) |
197 | { |
198 | struct i2c_client *client = to_i2c_client(dev); |
199 | struct lm87_data *data = i2c_get_clientdata(client); |
200 | |
201 | mutex_lock(&data->update_lock); |
202 | |
203 | if (time_after(jiffies, data->last_updated + HZ) || !data->valid) { |
204 | int i, j; |
205 | |
206 | dev_dbg(&client->dev, "Updating data.\n"); |
207 | |
208 | i = (data->channel & CHAN_TEMP3) ? 1 : 0; |
209 | j = (data->channel & CHAN_TEMP3) ? 5 : 6; |
210 | for (; i < j; i++) { |
211 | data->in[i] = lm87_read_value(client, |
212 | LM87_REG_IN(i)); |
213 | data->in_min[i] = lm87_read_value(client, |
214 | LM87_REG_IN_MIN(i)); |
215 | data->in_max[i] = lm87_read_value(client, |
216 | LM87_REG_IN_MAX(i)); |
217 | } |
218 | |
219 | for (i = 0; i < 2; i++) { |
220 | if (data->channel & CHAN_NO_FAN(i)) { |
221 | data->in[6+i] = lm87_read_value(client, |
222 | LM87_REG_AIN(i)); |
223 | data->in_max[6+i] = lm87_read_value(client, |
224 | LM87_REG_AIN_MAX(i)); |
225 | data->in_min[6+i] = lm87_read_value(client, |
226 | LM87_REG_AIN_MIN(i)); |
227 | |
228 | } else { |
229 | data->fan[i] = lm87_read_value(client, |
230 | LM87_REG_FAN(i)); |
231 | data->fan_min[i] = lm87_read_value(client, |
232 | LM87_REG_FAN_MIN(i)); |
233 | } |
234 | } |
235 | |
236 | j = (data->channel & CHAN_TEMP3) ? 3 : 2; |
237 | for (i = 0 ; i < j; i++) { |
238 | data->temp[i] = lm87_read_value(client, |
239 | LM87_REG_TEMP[i]); |
240 | data->temp_high[i] = lm87_read_value(client, |
241 | LM87_REG_TEMP_HIGH[i]); |
242 | data->temp_low[i] = lm87_read_value(client, |
243 | LM87_REG_TEMP_LOW[i]); |
244 | } |
245 | |
246 | i = lm87_read_value(client, LM87_REG_TEMP_HW_INT_LOCK); |
247 | j = lm87_read_value(client, LM87_REG_TEMP_HW_INT); |
248 | data->temp_crit_int = min(i, j); |
249 | |
250 | i = lm87_read_value(client, LM87_REG_TEMP_HW_EXT_LOCK); |
251 | j = lm87_read_value(client, LM87_REG_TEMP_HW_EXT); |
252 | data->temp_crit_ext = min(i, j); |
253 | |
254 | i = lm87_read_value(client, LM87_REG_VID_FAN_DIV); |
255 | data->fan_div[0] = (i >> 4) & 0x03; |
256 | data->fan_div[1] = (i >> 6) & 0x03; |
257 | data->vid = (i & 0x0F) |
258 | | (lm87_read_value(client, LM87_REG_VID4) & 0x01) |
259 | << 4; |
260 | |
261 | data->alarms = lm87_read_value(client, LM87_REG_ALARMS1) |
262 | | (lm87_read_value(client, LM87_REG_ALARMS2) |
263 | << 8); |
264 | data->aout = lm87_read_value(client, LM87_REG_AOUT); |
265 | |
266 | data->last_updated = jiffies; |
267 | data->valid = 1; |
268 | } |
269 | |
270 | mutex_unlock(&data->update_lock); |
271 | |
272 | return data; |
273 | } |
274 | |
275 | /* |
276 | * Sysfs stuff |
277 | */ |
278 | |
279 | static ssize_t show_in_input(struct device *dev, struct device_attribute *attr, |
280 | char *buf) |
281 | { |
282 | struct lm87_data *data = lm87_update_device(dev); |
283 | int nr = to_sensor_dev_attr(attr)->index; |
284 | |
285 | return sprintf(buf, "%u\n", IN_FROM_REG(data->in[nr], |
286 | data->in_scale[nr])); |
287 | } |
288 | |
289 | static ssize_t show_in_min(struct device *dev, |
290 | struct device_attribute *attr, char *buf) |
291 | { |
292 | struct lm87_data *data = lm87_update_device(dev); |
293 | int nr = to_sensor_dev_attr(attr)->index; |
294 | |
295 | return sprintf(buf, "%u\n", IN_FROM_REG(data->in_min[nr], |
296 | data->in_scale[nr])); |
297 | } |
298 | |
299 | static ssize_t show_in_max(struct device *dev, |
300 | struct device_attribute *attr, char *buf) |
301 | { |
302 | struct lm87_data *data = lm87_update_device(dev); |
303 | int nr = to_sensor_dev_attr(attr)->index; |
304 | |
305 | return sprintf(buf, "%u\n", IN_FROM_REG(data->in_max[nr], |
306 | data->in_scale[nr])); |
307 | } |
308 | |
309 | static ssize_t set_in_min(struct device *dev, struct device_attribute *attr, |
310 | const char *buf, size_t count) |
311 | { |
312 | struct i2c_client *client = to_i2c_client(dev); |
313 | struct lm87_data *data = i2c_get_clientdata(client); |
314 | int nr = to_sensor_dev_attr(attr)->index; |
315 | long val; |
316 | int err; |
317 | |
318 | err = kstrtol(buf, 10, &val); |
319 | if (err) |
320 | return err; |
321 | |
322 | mutex_lock(&data->update_lock); |
323 | data->in_min[nr] = IN_TO_REG(val, data->in_scale[nr]); |
324 | lm87_write_value(client, nr < 6 ? LM87_REG_IN_MIN(nr) : |
325 | LM87_REG_AIN_MIN(nr - 6), data->in_min[nr]); |
326 | mutex_unlock(&data->update_lock); |
327 | return count; |
328 | } |
329 | |
330 | static ssize_t set_in_max(struct device *dev, struct device_attribute *attr, |
331 | const char *buf, size_t count) |
332 | { |
333 | struct i2c_client *client = to_i2c_client(dev); |
334 | struct lm87_data *data = i2c_get_clientdata(client); |
335 | int nr = to_sensor_dev_attr(attr)->index; |
336 | long val; |
337 | int err; |
338 | |
339 | err = kstrtol(buf, 10, &val); |
340 | if (err) |
341 | return err; |
342 | |
343 | mutex_lock(&data->update_lock); |
344 | data->in_max[nr] = IN_TO_REG(val, data->in_scale[nr]); |
345 | lm87_write_value(client, nr < 6 ? LM87_REG_IN_MAX(nr) : |
346 | LM87_REG_AIN_MAX(nr - 6), data->in_max[nr]); |
347 | mutex_unlock(&data->update_lock); |
348 | return count; |
349 | } |
350 | |
351 | #define set_in(offset) \ |
352 | static SENSOR_DEVICE_ATTR(in##offset##_input, S_IRUGO, \ |
353 | show_in_input, NULL, offset); \ |
354 | static SENSOR_DEVICE_ATTR(in##offset##_min, S_IRUGO | S_IWUSR, \ |
355 | show_in_min, set_in_min, offset); \ |
356 | static SENSOR_DEVICE_ATTR(in##offset##_max, S_IRUGO | S_IWUSR, \ |
357 | show_in_max, set_in_max, offset) |
358 | set_in(0); |
359 | set_in(1); |
360 | set_in(2); |
361 | set_in(3); |
362 | set_in(4); |
363 | set_in(5); |
364 | set_in(6); |
365 | set_in(7); |
366 | |
367 | static ssize_t show_temp_input(struct device *dev, |
368 | struct device_attribute *attr, char *buf) |
369 | { |
370 | struct lm87_data *data = lm87_update_device(dev); |
371 | int nr = to_sensor_dev_attr(attr)->index; |
372 | |
373 | return sprintf(buf, "%d\n", TEMP_FROM_REG(data->temp[nr])); |
374 | } |
375 | |
376 | static ssize_t show_temp_low(struct device *dev, |
377 | struct device_attribute *attr, char *buf) |
378 | { |
379 | struct lm87_data *data = lm87_update_device(dev); |
380 | int nr = to_sensor_dev_attr(attr)->index; |
381 | |
382 | return sprintf(buf, "%d\n", |
383 | TEMP_FROM_REG(data->temp_low[nr])); |
384 | } |
385 | |
386 | static ssize_t show_temp_high(struct device *dev, |
387 | struct device_attribute *attr, char *buf) |
388 | { |
389 | struct lm87_data *data = lm87_update_device(dev); |
390 | int nr = to_sensor_dev_attr(attr)->index; |
391 | |
392 | return sprintf(buf, "%d\n", |
393 | TEMP_FROM_REG(data->temp_high[nr])); |
394 | } |
395 | |
396 | static ssize_t set_temp_low(struct device *dev, struct device_attribute *attr, |
397 | const char *buf, size_t count) |
398 | { |
399 | struct i2c_client *client = to_i2c_client(dev); |
400 | struct lm87_data *data = i2c_get_clientdata(client); |
401 | int nr = to_sensor_dev_attr(attr)->index; |
402 | long val; |
403 | int err; |
404 | |
405 | err = kstrtol(buf, 10, &val); |
406 | if (err) |
407 | return err; |
408 | |
409 | mutex_lock(&data->update_lock); |
410 | data->temp_low[nr] = TEMP_TO_REG(val); |
411 | lm87_write_value(client, LM87_REG_TEMP_LOW[nr], data->temp_low[nr]); |
412 | mutex_unlock(&data->update_lock); |
413 | return count; |
414 | } |
415 | |
416 | static ssize_t set_temp_high(struct device *dev, struct device_attribute *attr, |
417 | const char *buf, size_t count) |
418 | { |
419 | struct i2c_client *client = to_i2c_client(dev); |
420 | struct lm87_data *data = i2c_get_clientdata(client); |
421 | int nr = to_sensor_dev_attr(attr)->index; |
422 | long val; |
423 | int err; |
424 | |
425 | err = kstrtol(buf, 10, &val); |
426 | if (err) |
427 | return err; |
428 | |
429 | mutex_lock(&data->update_lock); |
430 | data->temp_high[nr] = TEMP_TO_REG(val); |
431 | lm87_write_value(client, LM87_REG_TEMP_HIGH[nr], data->temp_high[nr]); |
432 | mutex_unlock(&data->update_lock); |
433 | return count; |
434 | } |
435 | |
436 | #define set_temp(offset) \ |
437 | static SENSOR_DEVICE_ATTR(temp##offset##_input, S_IRUGO, \ |
438 | show_temp_input, NULL, offset - 1); \ |
439 | static SENSOR_DEVICE_ATTR(temp##offset##_max, S_IRUGO | S_IWUSR, \ |
440 | show_temp_high, set_temp_high, offset - 1); \ |
441 | static SENSOR_DEVICE_ATTR(temp##offset##_min, S_IRUGO | S_IWUSR, \ |
442 | show_temp_low, set_temp_low, offset - 1) |
443 | set_temp(1); |
444 | set_temp(2); |
445 | set_temp(3); |
446 | |
447 | static ssize_t show_temp_crit_int(struct device *dev, |
448 | struct device_attribute *attr, char *buf) |
449 | { |
450 | struct lm87_data *data = lm87_update_device(dev); |
451 | return sprintf(buf, "%d\n", TEMP_FROM_REG(data->temp_crit_int)); |
452 | } |
453 | |
454 | static ssize_t show_temp_crit_ext(struct device *dev, |
455 | struct device_attribute *attr, char *buf) |
456 | { |
457 | struct lm87_data *data = lm87_update_device(dev); |
458 | return sprintf(buf, "%d\n", TEMP_FROM_REG(data->temp_crit_ext)); |
459 | } |
460 | |
461 | static DEVICE_ATTR(temp1_crit, S_IRUGO, show_temp_crit_int, NULL); |
462 | static DEVICE_ATTR(temp2_crit, S_IRUGO, show_temp_crit_ext, NULL); |
463 | static DEVICE_ATTR(temp3_crit, S_IRUGO, show_temp_crit_ext, NULL); |
464 | |
465 | static ssize_t show_fan_input(struct device *dev, |
466 | struct device_attribute *attr, char *buf) |
467 | { |
468 | struct lm87_data *data = lm87_update_device(dev); |
469 | int nr = to_sensor_dev_attr(attr)->index; |
470 | |
471 | return sprintf(buf, "%d\n", FAN_FROM_REG(data->fan[nr], |
472 | FAN_DIV_FROM_REG(data->fan_div[nr]))); |
473 | } |
474 | |
475 | static ssize_t show_fan_min(struct device *dev, |
476 | struct device_attribute *attr, char *buf) |
477 | { |
478 | struct lm87_data *data = lm87_update_device(dev); |
479 | int nr = to_sensor_dev_attr(attr)->index; |
480 | |
481 | return sprintf(buf, "%d\n", FAN_FROM_REG(data->fan_min[nr], |
482 | FAN_DIV_FROM_REG(data->fan_div[nr]))); |
483 | } |
484 | |
485 | static ssize_t show_fan_div(struct device *dev, |
486 | struct device_attribute *attr, char *buf) |
487 | { |
488 | struct lm87_data *data = lm87_update_device(dev); |
489 | int nr = to_sensor_dev_attr(attr)->index; |
490 | |
491 | return sprintf(buf, "%d\n", |
492 | FAN_DIV_FROM_REG(data->fan_div[nr])); |
493 | } |
494 | |
495 | static ssize_t set_fan_min(struct device *dev, struct device_attribute *attr, |
496 | const char *buf, size_t count) |
497 | { |
498 | struct i2c_client *client = to_i2c_client(dev); |
499 | struct lm87_data *data = i2c_get_clientdata(client); |
500 | int nr = to_sensor_dev_attr(attr)->index; |
501 | long val; |
502 | int err; |
503 | |
504 | err = kstrtol(buf, 10, &val); |
505 | if (err) |
506 | return err; |
507 | |
508 | mutex_lock(&data->update_lock); |
509 | data->fan_min[nr] = FAN_TO_REG(val, |
510 | FAN_DIV_FROM_REG(data->fan_div[nr])); |
511 | lm87_write_value(client, LM87_REG_FAN_MIN(nr), data->fan_min[nr]); |
512 | mutex_unlock(&data->update_lock); |
513 | return count; |
514 | } |
515 | |
516 | /* |
517 | * Note: we save and restore the fan minimum here, because its value is |
518 | * determined in part by the fan clock divider. This follows the principle |
519 | * of least surprise; the user doesn't expect the fan minimum to change just |
520 | * because the divider changed. |
521 | */ |
522 | static ssize_t set_fan_div(struct device *dev, struct device_attribute *attr, |
523 | const char *buf, size_t count) |
524 | { |
525 | struct i2c_client *client = to_i2c_client(dev); |
526 | struct lm87_data *data = i2c_get_clientdata(client); |
527 | int nr = to_sensor_dev_attr(attr)->index; |
528 | long val; |
529 | int err; |
530 | unsigned long min; |
531 | u8 reg; |
532 | |
533 | err = kstrtol(buf, 10, &val); |
534 | if (err) |
535 | return err; |
536 | |
537 | mutex_lock(&data->update_lock); |
538 | min = FAN_FROM_REG(data->fan_min[nr], |
539 | FAN_DIV_FROM_REG(data->fan_div[nr])); |
540 | |
541 | switch (val) { |
542 | case 1: |
543 | data->fan_div[nr] = 0; |
544 | break; |
545 | case 2: |
546 | data->fan_div[nr] = 1; |
547 | break; |
548 | case 4: |
549 | data->fan_div[nr] = 2; |
550 | break; |
551 | case 8: |
552 | data->fan_div[nr] = 3; |
553 | break; |
554 | default: |
555 | mutex_unlock(&data->update_lock); |
556 | return -EINVAL; |
557 | } |
558 | |
559 | reg = lm87_read_value(client, LM87_REG_VID_FAN_DIV); |
560 | switch (nr) { |
561 | case 0: |
562 | reg = (reg & 0xCF) | (data->fan_div[0] << 4); |
563 | break; |
564 | case 1: |
565 | reg = (reg & 0x3F) | (data->fan_div[1] << 6); |
566 | break; |
567 | } |
568 | lm87_write_value(client, LM87_REG_VID_FAN_DIV, reg); |
569 | |
570 | data->fan_min[nr] = FAN_TO_REG(min, val); |
571 | lm87_write_value(client, LM87_REG_FAN_MIN(nr), |
572 | data->fan_min[nr]); |
573 | mutex_unlock(&data->update_lock); |
574 | |
575 | return count; |
576 | } |
577 | |
578 | #define set_fan(offset) \ |
579 | static SENSOR_DEVICE_ATTR(fan##offset##_input, S_IRUGO, \ |
580 | show_fan_input, NULL, offset - 1); \ |
581 | static SENSOR_DEVICE_ATTR(fan##offset##_min, S_IRUGO | S_IWUSR, \ |
582 | show_fan_min, set_fan_min, offset - 1); \ |
583 | static SENSOR_DEVICE_ATTR(fan##offset##_div, S_IRUGO | S_IWUSR, \ |
584 | show_fan_div, set_fan_div, offset - 1) |
585 | set_fan(1); |
586 | set_fan(2); |
587 | |
588 | static ssize_t show_alarms(struct device *dev, struct device_attribute *attr, |
589 | char *buf) |
590 | { |
591 | struct lm87_data *data = lm87_update_device(dev); |
592 | return sprintf(buf, "%d\n", data->alarms); |
593 | } |
594 | static DEVICE_ATTR(alarms, S_IRUGO, show_alarms, NULL); |
595 | |
596 | static ssize_t show_vid(struct device *dev, struct device_attribute *attr, |
597 | char *buf) |
598 | { |
599 | struct lm87_data *data = lm87_update_device(dev); |
600 | return sprintf(buf, "%d\n", vid_from_reg(data->vid, data->vrm)); |
601 | } |
602 | static DEVICE_ATTR(cpu0_vid, S_IRUGO, show_vid, NULL); |
603 | |
604 | static ssize_t show_vrm(struct device *dev, struct device_attribute *attr, |
605 | char *buf) |
606 | { |
607 | struct lm87_data *data = dev_get_drvdata(dev); |
608 | return sprintf(buf, "%d\n", data->vrm); |
609 | } |
610 | static ssize_t set_vrm(struct device *dev, struct device_attribute *attr, |
611 | const char *buf, size_t count) |
612 | { |
613 | struct lm87_data *data = dev_get_drvdata(dev); |
614 | unsigned long val; |
615 | int err; |
616 | |
617 | err = kstrtoul(buf, 10, &val); |
618 | if (err) |
619 | return err; |
620 | data->vrm = val; |
621 | return count; |
622 | } |
623 | static DEVICE_ATTR(vrm, S_IRUGO | S_IWUSR, show_vrm, set_vrm); |
624 | |
625 | static ssize_t show_aout(struct device *dev, struct device_attribute *attr, |
626 | char *buf) |
627 | { |
628 | struct lm87_data *data = lm87_update_device(dev); |
629 | return sprintf(buf, "%d\n", AOUT_FROM_REG(data->aout)); |
630 | } |
631 | static ssize_t set_aout(struct device *dev, struct device_attribute *attr, |
632 | const char *buf, size_t count) |
633 | { |
634 | struct i2c_client *client = to_i2c_client(dev); |
635 | struct lm87_data *data = i2c_get_clientdata(client); |
636 | long val; |
637 | int err; |
638 | |
639 | err = kstrtol(buf, 10, &val); |
640 | if (err) |
641 | return err; |
642 | |
643 | mutex_lock(&data->update_lock); |
644 | data->aout = AOUT_TO_REG(val); |
645 | lm87_write_value(client, LM87_REG_AOUT, data->aout); |
646 | mutex_unlock(&data->update_lock); |
647 | return count; |
648 | } |
649 | static DEVICE_ATTR(aout_output, S_IRUGO | S_IWUSR, show_aout, set_aout); |
650 | |
651 | static ssize_t show_alarm(struct device *dev, struct device_attribute *attr, |
652 | char *buf) |
653 | { |
654 | struct lm87_data *data = lm87_update_device(dev); |
655 | int bitnr = to_sensor_dev_attr(attr)->index; |
656 | return sprintf(buf, "%u\n", (data->alarms >> bitnr) & 1); |
657 | } |
658 | static SENSOR_DEVICE_ATTR(in0_alarm, S_IRUGO, show_alarm, NULL, 0); |
659 | static SENSOR_DEVICE_ATTR(in1_alarm, S_IRUGO, show_alarm, NULL, 1); |
660 | static SENSOR_DEVICE_ATTR(in2_alarm, S_IRUGO, show_alarm, NULL, 2); |
661 | static SENSOR_DEVICE_ATTR(in3_alarm, S_IRUGO, show_alarm, NULL, 3); |
662 | static SENSOR_DEVICE_ATTR(in4_alarm, S_IRUGO, show_alarm, NULL, 8); |
663 | static SENSOR_DEVICE_ATTR(in5_alarm, S_IRUGO, show_alarm, NULL, 9); |
664 | static SENSOR_DEVICE_ATTR(in6_alarm, S_IRUGO, show_alarm, NULL, 6); |
665 | static SENSOR_DEVICE_ATTR(in7_alarm, S_IRUGO, show_alarm, NULL, 7); |
666 | static SENSOR_DEVICE_ATTR(temp1_alarm, S_IRUGO, show_alarm, NULL, 4); |
667 | static SENSOR_DEVICE_ATTR(temp2_alarm, S_IRUGO, show_alarm, NULL, 5); |
668 | static SENSOR_DEVICE_ATTR(temp3_alarm, S_IRUGO, show_alarm, NULL, 5); |
669 | static SENSOR_DEVICE_ATTR(fan1_alarm, S_IRUGO, show_alarm, NULL, 6); |
670 | static SENSOR_DEVICE_ATTR(fan2_alarm, S_IRUGO, show_alarm, NULL, 7); |
671 | static SENSOR_DEVICE_ATTR(temp2_fault, S_IRUGO, show_alarm, NULL, 14); |
672 | static SENSOR_DEVICE_ATTR(temp3_fault, S_IRUGO, show_alarm, NULL, 15); |
673 | |
674 | /* |
675 | * Real code |
676 | */ |
677 | |
678 | static struct attribute *lm87_attributes[] = { |
679 | &sensor_dev_attr_in1_input.dev_attr.attr, |
680 | &sensor_dev_attr_in1_min.dev_attr.attr, |
681 | &sensor_dev_attr_in1_max.dev_attr.attr, |
682 | &sensor_dev_attr_in1_alarm.dev_attr.attr, |
683 | &sensor_dev_attr_in2_input.dev_attr.attr, |
684 | &sensor_dev_attr_in2_min.dev_attr.attr, |
685 | &sensor_dev_attr_in2_max.dev_attr.attr, |
686 | &sensor_dev_attr_in2_alarm.dev_attr.attr, |
687 | &sensor_dev_attr_in3_input.dev_attr.attr, |
688 | &sensor_dev_attr_in3_min.dev_attr.attr, |
689 | &sensor_dev_attr_in3_max.dev_attr.attr, |
690 | &sensor_dev_attr_in3_alarm.dev_attr.attr, |
691 | &sensor_dev_attr_in4_input.dev_attr.attr, |
692 | &sensor_dev_attr_in4_min.dev_attr.attr, |
693 | &sensor_dev_attr_in4_max.dev_attr.attr, |
694 | &sensor_dev_attr_in4_alarm.dev_attr.attr, |
695 | |
696 | &sensor_dev_attr_temp1_input.dev_attr.attr, |
697 | &sensor_dev_attr_temp1_max.dev_attr.attr, |
698 | &sensor_dev_attr_temp1_min.dev_attr.attr, |
699 | &dev_attr_temp1_crit.attr, |
700 | &sensor_dev_attr_temp1_alarm.dev_attr.attr, |
701 | &sensor_dev_attr_temp2_input.dev_attr.attr, |
702 | &sensor_dev_attr_temp2_max.dev_attr.attr, |
703 | &sensor_dev_attr_temp2_min.dev_attr.attr, |
704 | &dev_attr_temp2_crit.attr, |
705 | &sensor_dev_attr_temp2_alarm.dev_attr.attr, |
706 | &sensor_dev_attr_temp2_fault.dev_attr.attr, |
707 | |
708 | &dev_attr_alarms.attr, |
709 | &dev_attr_aout_output.attr, |
710 | |
711 | NULL |
712 | }; |
713 | |
714 | static const struct attribute_group lm87_group = { |
715 | .attrs = lm87_attributes, |
716 | }; |
717 | |
718 | static struct attribute *lm87_attributes_in6[] = { |
719 | &sensor_dev_attr_in6_input.dev_attr.attr, |
720 | &sensor_dev_attr_in6_min.dev_attr.attr, |
721 | &sensor_dev_attr_in6_max.dev_attr.attr, |
722 | &sensor_dev_attr_in6_alarm.dev_attr.attr, |
723 | NULL |
724 | }; |
725 | |
726 | static const struct attribute_group lm87_group_in6 = { |
727 | .attrs = lm87_attributes_in6, |
728 | }; |
729 | |
730 | static struct attribute *lm87_attributes_fan1[] = { |
731 | &sensor_dev_attr_fan1_input.dev_attr.attr, |
732 | &sensor_dev_attr_fan1_min.dev_attr.attr, |
733 | &sensor_dev_attr_fan1_div.dev_attr.attr, |
734 | &sensor_dev_attr_fan1_alarm.dev_attr.attr, |
735 | NULL |
736 | }; |
737 | |
738 | static const struct attribute_group lm87_group_fan1 = { |
739 | .attrs = lm87_attributes_fan1, |
740 | }; |
741 | |
742 | static struct attribute *lm87_attributes_in7[] = { |
743 | &sensor_dev_attr_in7_input.dev_attr.attr, |
744 | &sensor_dev_attr_in7_min.dev_attr.attr, |
745 | &sensor_dev_attr_in7_max.dev_attr.attr, |
746 | &sensor_dev_attr_in7_alarm.dev_attr.attr, |
747 | NULL |
748 | }; |
749 | |
750 | static const struct attribute_group lm87_group_in7 = { |
751 | .attrs = lm87_attributes_in7, |
752 | }; |
753 | |
754 | static struct attribute *lm87_attributes_fan2[] = { |
755 | &sensor_dev_attr_fan2_input.dev_attr.attr, |
756 | &sensor_dev_attr_fan2_min.dev_attr.attr, |
757 | &sensor_dev_attr_fan2_div.dev_attr.attr, |
758 | &sensor_dev_attr_fan2_alarm.dev_attr.attr, |
759 | NULL |
760 | }; |
761 | |
762 | static const struct attribute_group lm87_group_fan2 = { |
763 | .attrs = lm87_attributes_fan2, |
764 | }; |
765 | |
766 | static struct attribute *lm87_attributes_temp3[] = { |
767 | &sensor_dev_attr_temp3_input.dev_attr.attr, |
768 | &sensor_dev_attr_temp3_max.dev_attr.attr, |
769 | &sensor_dev_attr_temp3_min.dev_attr.attr, |
770 | &dev_attr_temp3_crit.attr, |
771 | &sensor_dev_attr_temp3_alarm.dev_attr.attr, |
772 | &sensor_dev_attr_temp3_fault.dev_attr.attr, |
773 | NULL |
774 | }; |
775 | |
776 | static const struct attribute_group lm87_group_temp3 = { |
777 | .attrs = lm87_attributes_temp3, |
778 | }; |
779 | |
780 | static struct attribute *lm87_attributes_in0_5[] = { |
781 | &sensor_dev_attr_in0_input.dev_attr.attr, |
782 | &sensor_dev_attr_in0_min.dev_attr.attr, |
783 | &sensor_dev_attr_in0_max.dev_attr.attr, |
784 | &sensor_dev_attr_in0_alarm.dev_attr.attr, |
785 | &sensor_dev_attr_in5_input.dev_attr.attr, |
786 | &sensor_dev_attr_in5_min.dev_attr.attr, |
787 | &sensor_dev_attr_in5_max.dev_attr.attr, |
788 | &sensor_dev_attr_in5_alarm.dev_attr.attr, |
789 | NULL |
790 | }; |
791 | |
792 | static const struct attribute_group lm87_group_in0_5 = { |
793 | .attrs = lm87_attributes_in0_5, |
794 | }; |
795 | |
796 | static struct attribute *lm87_attributes_vid[] = { |
797 | &dev_attr_cpu0_vid.attr, |
798 | &dev_attr_vrm.attr, |
799 | NULL |
800 | }; |
801 | |
802 | static const struct attribute_group lm87_group_vid = { |
803 | .attrs = lm87_attributes_vid, |
804 | }; |
805 | |
806 | /* Return 0 if detection is successful, -ENODEV otherwise */ |
807 | static int lm87_detect(struct i2c_client *client, struct i2c_board_info *info) |
808 | { |
809 | struct i2c_adapter *adapter = client->adapter; |
810 | const char *name; |
811 | u8 cid, rev; |
812 | |
813 | if (!i2c_check_functionality(adapter, I2C_FUNC_SMBUS_BYTE_DATA)) |
814 | return -ENODEV; |
815 | |
816 | if (lm87_read_value(client, LM87_REG_CONFIG) & 0x80) |
817 | return -ENODEV; |
818 | |
819 | /* Now, we do the remaining detection. */ |
820 | cid = lm87_read_value(client, LM87_REG_COMPANY_ID); |
821 | rev = lm87_read_value(client, LM87_REG_REVISION); |
822 | |
823 | if (cid == 0x02 /* National Semiconductor */ |
824 | && (rev >= 0x01 && rev <= 0x08)) |
825 | name = "lm87"; |
826 | else if (cid == 0x41 /* Analog Devices */ |
827 | && (rev & 0xf0) == 0x10) |
828 | name = "adm1024"; |
829 | else { |
830 | dev_dbg(&adapter->dev, "LM87 detection failed at 0x%02x\n", |
831 | client->addr); |
832 | return -ENODEV; |
833 | } |
834 | |
835 | strlcpy(info->type, name, I2C_NAME_SIZE); |
836 | |
837 | return 0; |
838 | } |
839 | |
840 | static void lm87_remove_files(struct i2c_client *client) |
841 | { |
842 | struct device *dev = &client->dev; |
843 | |
844 | sysfs_remove_group(&dev->kobj, &lm87_group); |
845 | sysfs_remove_group(&dev->kobj, &lm87_group_in6); |
846 | sysfs_remove_group(&dev->kobj, &lm87_group_fan1); |
847 | sysfs_remove_group(&dev->kobj, &lm87_group_in7); |
848 | sysfs_remove_group(&dev->kobj, &lm87_group_fan2); |
849 | sysfs_remove_group(&dev->kobj, &lm87_group_temp3); |
850 | sysfs_remove_group(&dev->kobj, &lm87_group_in0_5); |
851 | sysfs_remove_group(&dev->kobj, &lm87_group_vid); |
852 | } |
853 | |
854 | static void lm87_init_client(struct i2c_client *client) |
855 | { |
856 | struct lm87_data *data = i2c_get_clientdata(client); |
857 | |
858 | if (dev_get_platdata(&client->dev)) { |
859 | data->channel = *(u8 *)dev_get_platdata(&client->dev); |
860 | lm87_write_value(client, |
861 | LM87_REG_CHANNEL_MODE, data->channel); |
862 | } else { |
863 | data->channel = lm87_read_value(client, LM87_REG_CHANNEL_MODE); |
864 | } |
865 | data->config = lm87_read_value(client, LM87_REG_CONFIG) & 0x6F; |
866 | |
867 | if (!(data->config & 0x01)) { |
868 | int i; |
869 | |
870 | /* Limits are left uninitialized after power-up */ |
871 | for (i = 1; i < 6; i++) { |
872 | lm87_write_value(client, LM87_REG_IN_MIN(i), 0x00); |
873 | lm87_write_value(client, LM87_REG_IN_MAX(i), 0xFF); |
874 | } |
875 | for (i = 0; i < 2; i++) { |
876 | lm87_write_value(client, LM87_REG_TEMP_HIGH[i], 0x7F); |
877 | lm87_write_value(client, LM87_REG_TEMP_LOW[i], 0x00); |
878 | lm87_write_value(client, LM87_REG_AIN_MIN(i), 0x00); |
879 | lm87_write_value(client, LM87_REG_AIN_MAX(i), 0xFF); |
880 | } |
881 | if (data->channel & CHAN_TEMP3) { |
882 | lm87_write_value(client, LM87_REG_TEMP_HIGH[2], 0x7F); |
883 | lm87_write_value(client, LM87_REG_TEMP_LOW[2], 0x00); |
884 | } else { |
885 | lm87_write_value(client, LM87_REG_IN_MIN(0), 0x00); |
886 | lm87_write_value(client, LM87_REG_IN_MAX(0), 0xFF); |
887 | } |
888 | } |
889 | |
890 | /* Make sure Start is set and INT#_Clear is clear */ |
891 | if ((data->config & 0x09) != 0x01) |
892 | lm87_write_value(client, LM87_REG_CONFIG, |
893 | (data->config & 0x77) | 0x01); |
894 | } |
895 | |
896 | static int lm87_probe(struct i2c_client *client, const struct i2c_device_id *id) |
897 | { |
898 | struct lm87_data *data; |
899 | int err; |
900 | |
901 | data = devm_kzalloc(&client->dev, sizeof(struct lm87_data), GFP_KERNEL); |
902 | if (!data) |
903 | return -ENOMEM; |
904 | |
905 | i2c_set_clientdata(client, data); |
906 | data->valid = 0; |
907 | mutex_init(&data->update_lock); |
908 | |
909 | /* Initialize the LM87 chip */ |
910 | lm87_init_client(client); |
911 | |
912 | data->in_scale[0] = 2500; |
913 | data->in_scale[1] = 2700; |
914 | data->in_scale[2] = (data->channel & CHAN_VCC_5V) ? 5000 : 3300; |
915 | data->in_scale[3] = 5000; |
916 | data->in_scale[4] = 12000; |
917 | data->in_scale[5] = 2700; |
918 | data->in_scale[6] = 1875; |
919 | data->in_scale[7] = 1875; |
920 | |
921 | /* Register sysfs hooks */ |
922 | err = sysfs_create_group(&client->dev.kobj, &lm87_group); |
923 | if (err) |
924 | goto exit_stop; |
925 | |
926 | if (data->channel & CHAN_NO_FAN(0)) { |
927 | err = sysfs_create_group(&client->dev.kobj, &lm87_group_in6); |
928 | if (err) |
929 | goto exit_remove; |
930 | } else { |
931 | err = sysfs_create_group(&client->dev.kobj, &lm87_group_fan1); |
932 | if (err) |
933 | goto exit_remove; |
934 | } |
935 | |
936 | if (data->channel & CHAN_NO_FAN(1)) { |
937 | err = sysfs_create_group(&client->dev.kobj, &lm87_group_in7); |
938 | if (err) |
939 | goto exit_remove; |
940 | } else { |
941 | err = sysfs_create_group(&client->dev.kobj, &lm87_group_fan2); |
942 | if (err) |
943 | goto exit_remove; |
944 | } |
945 | |
946 | if (data->channel & CHAN_TEMP3) { |
947 | err = sysfs_create_group(&client->dev.kobj, &lm87_group_temp3); |
948 | if (err) |
949 | goto exit_remove; |
950 | } else { |
951 | err = sysfs_create_group(&client->dev.kobj, &lm87_group_in0_5); |
952 | if (err) |
953 | goto exit_remove; |
954 | } |
955 | |
956 | if (!(data->channel & CHAN_NO_VID)) { |
957 | data->vrm = vid_which_vrm(); |
958 | err = sysfs_create_group(&client->dev.kobj, &lm87_group_vid); |
959 | if (err) |
960 | goto exit_remove; |
961 | } |
962 | |
963 | data->hwmon_dev = hwmon_device_register(&client->dev); |
964 | if (IS_ERR(data->hwmon_dev)) { |
965 | err = PTR_ERR(data->hwmon_dev); |
966 | goto exit_remove; |
967 | } |
968 | |
969 | return 0; |
970 | |
971 | exit_remove: |
972 | lm87_remove_files(client); |
973 | exit_stop: |
974 | lm87_write_value(client, LM87_REG_CONFIG, data->config); |
975 | return err; |
976 | } |
977 | |
978 | static int lm87_remove(struct i2c_client *client) |
979 | { |
980 | struct lm87_data *data = i2c_get_clientdata(client); |
981 | |
982 | hwmon_device_unregister(data->hwmon_dev); |
983 | lm87_remove_files(client); |
984 | |
985 | lm87_write_value(client, LM87_REG_CONFIG, data->config); |
986 | return 0; |
987 | } |
988 | |
989 | /* |
990 | * Driver data (common to all clients) |
991 | */ |
992 | |
993 | static const struct i2c_device_id lm87_id[] = { |
994 | { "lm87", lm87 }, |
995 | { "adm1024", adm1024 }, |
996 | { } |
997 | }; |
998 | MODULE_DEVICE_TABLE(i2c, lm87_id); |
999 | |
1000 | static struct i2c_driver lm87_driver = { |
1001 | .class = I2C_CLASS_HWMON, |
1002 | .driver = { |
1003 | .name = "lm87", |
1004 | }, |
1005 | .probe = lm87_probe, |
1006 | .remove = lm87_remove, |
1007 | .id_table = lm87_id, |
1008 | .detect = lm87_detect, |
1009 | .address_list = normal_i2c, |
1010 | }; |
1011 | |
1012 | module_i2c_driver(lm87_driver); |
1013 | |
1014 | MODULE_AUTHOR("Jean Delvare <khali@linux-fr.org> and others"); |
1015 | MODULE_DESCRIPTION("LM87 driver"); |
1016 | MODULE_LICENSE("GPL"); |
1017 |
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