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1da177e4 LT |
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 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 assumes that | |
25 | * the BIOS configured the chip correctly. In that respect, it differs from | |
26 | * the original driver (from lm_sensors for Linux 2.4), which would force the | |
27 | * LM87 to an arbitrary, compile-time chosen mode, regardless of the actual | |
28 | * chipset wiring. | |
29 | * For reference, here is the list of exclusive functions: | |
30 | * - in0+in5 (default) or temp3 | |
31 | * - fan1 (default) or in6 | |
32 | * - fan2 (default) or in7 | |
33 | * - VID lines (default) or IRQ lines (not handled by this driver) | |
34 | * | |
35 | * The LM87 additionally features an analog output, supposedly usable to | |
36 | * control the speed of a fan. All new chips use pulse width modulation | |
37 | * instead. The LM87 is the only hardware monitoring chipset I know of | |
38 | * which uses amplitude modulation. Be careful when using this feature. | |
39 | * | |
40 | * This program is free software; you can redistribute it and/or modify | |
41 | * it under the terms of the GNU General Public License as published by | |
42 | * the Free Software Foundation; either version 2 of the License, or | |
43 | * (at your option) any later version. | |
44 | * | |
45 | * This program is distributed in the hope that it will be useful, | |
46 | * but WITHOUT ANY WARRANTY; without even the implied warranty of | |
47 | * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the | |
48 | * GNU General Public License for more details. | |
49 | * | |
50 | * You should have received a copy of the GNU General Public License | |
51 | * along with this program; if not, write to the Free Software | |
52 | * Foundation, Inc., 675 Mass Ave, Cambridge, MA 02139, USA. | |
53 | */ | |
54 | ||
55 | #include <linux/config.h> | |
56 | #include <linux/module.h> | |
57 | #include <linux/init.h> | |
58 | #include <linux/slab.h> | |
59 | #include <linux/jiffies.h> | |
60 | #include <linux/i2c.h> | |
61 | #include <linux/i2c-sensor.h> | |
62 | #include <linux/i2c-vid.h> | |
63 | ||
64 | /* | |
65 | * Addresses to scan | |
66 | * LM87 has three possible addresses: 0x2c, 0x2d and 0x2e. | |
67 | */ | |
68 | ||
69 | static unsigned short normal_i2c[] = { 0x2c, 0x2d, 0x2e, I2C_CLIENT_END }; | |
70 | static unsigned int normal_isa[] = { I2C_CLIENT_ISA_END }; | |
71 | ||
72 | /* | |
73 | * Insmod parameters | |
74 | */ | |
75 | ||
76 | SENSORS_INSMOD_1(lm87); | |
77 | ||
78 | /* | |
79 | * The LM87 registers | |
80 | */ | |
81 | ||
82 | /* nr in 0..5 */ | |
83 | #define LM87_REG_IN(nr) (0x20 + (nr)) | |
84 | #define LM87_REG_IN_MAX(nr) (0x2B + (nr) * 2) | |
85 | #define LM87_REG_IN_MIN(nr) (0x2C + (nr) * 2) | |
86 | /* nr in 0..1 */ | |
87 | #define LM87_REG_AIN(nr) (0x28 + (nr)) | |
88 | #define LM87_REG_AIN_MIN(nr) (0x1A + (nr)) | |
89 | #define LM87_REG_AIN_MAX(nr) (0x3B + (nr)) | |
90 | ||
91 | static u8 LM87_REG_TEMP[3] = { 0x27, 0x26, 0x20 }; | |
92 | static u8 LM87_REG_TEMP_HIGH[3] = { 0x39, 0x37, 0x2B }; | |
93 | static u8 LM87_REG_TEMP_LOW[3] = { 0x3A, 0x38, 0x2C }; | |
94 | ||
95 | #define LM87_REG_TEMP_HW_INT_LOCK 0x13 | |
96 | #define LM87_REG_TEMP_HW_EXT_LOCK 0x14 | |
97 | #define LM87_REG_TEMP_HW_INT 0x17 | |
98 | #define LM87_REG_TEMP_HW_EXT 0x18 | |
99 | ||
100 | /* nr in 0..1 */ | |
101 | #define LM87_REG_FAN(nr) (0x28 + (nr)) | |
102 | #define LM87_REG_FAN_MIN(nr) (0x3B + (nr)) | |
103 | #define LM87_REG_AOUT 0x19 | |
104 | ||
105 | #define LM87_REG_CONFIG 0x40 | |
106 | #define LM87_REG_CHANNEL_MODE 0x16 | |
107 | #define LM87_REG_VID_FAN_DIV 0x47 | |
108 | #define LM87_REG_VID4 0x49 | |
109 | ||
110 | #define LM87_REG_ALARMS1 0x41 | |
111 | #define LM87_REG_ALARMS2 0x42 | |
112 | ||
113 | #define LM87_REG_COMPANY_ID 0x3E | |
114 | #define LM87_REG_REVISION 0x3F | |
115 | ||
116 | /* | |
117 | * Conversions and various macros | |
118 | * The LM87 uses signed 8-bit values for temperatures. | |
119 | */ | |
120 | ||
121 | #define IN_FROM_REG(reg,scale) (((reg) * (scale) + 96) / 192) | |
122 | #define IN_TO_REG(val,scale) ((val) <= 0 ? 0 : \ | |
123 | (val) * 192 >= (scale) * 255 ? 255 : \ | |
124 | ((val) * 192 + (scale)/2) / (scale)) | |
125 | ||
126 | #define TEMP_FROM_REG(reg) ((reg) * 1000) | |
127 | #define TEMP_TO_REG(val) ((val) <= -127500 ? -128 : \ | |
128 | (val) >= 126500 ? 127 : \ | |
129 | (((val) < 0 ? (val)-500 : (val)+500) / 1000)) | |
130 | ||
131 | #define FAN_FROM_REG(reg,div) ((reg) == 255 || (reg) == 0 ? 0 : \ | |
132 | 1350000 + (reg)*(div) / 2) / ((reg)*(div)) | |
133 | #define FAN_TO_REG(val,div) ((val)*(div) * 255 <= 1350000 ? 255 : \ | |
134 | (1350000 + (val)*(div) / 2) / ((val)*(div))) | |
135 | ||
136 | #define FAN_DIV_FROM_REG(reg) (1 << (reg)) | |
137 | ||
138 | /* analog out is 9.80mV/LSB */ | |
139 | #define AOUT_FROM_REG(reg) (((reg) * 98 + 5) / 10) | |
140 | #define AOUT_TO_REG(val) ((val) <= 0 ? 0 : \ | |
141 | (val) >= 2500 ? 255 : \ | |
142 | ((val) * 10 + 49) / 98) | |
143 | ||
144 | /* nr in 0..1 */ | |
145 | #define CHAN_NO_FAN(nr) (1 << (nr)) | |
146 | #define CHAN_TEMP3 (1 << 2) | |
147 | #define CHAN_VCC_5V (1 << 3) | |
148 | #define CHAN_NO_VID (1 << 8) | |
149 | ||
150 | /* | |
151 | * Functions declaration | |
152 | */ | |
153 | ||
154 | static int lm87_attach_adapter(struct i2c_adapter *adapter); | |
155 | static int lm87_detect(struct i2c_adapter *adapter, int address, int kind); | |
156 | static void lm87_init_client(struct i2c_client *client); | |
157 | static int lm87_detach_client(struct i2c_client *client); | |
158 | static struct lm87_data *lm87_update_device(struct device *dev); | |
159 | ||
160 | /* | |
161 | * Driver data (common to all clients) | |
162 | */ | |
163 | ||
164 | static struct i2c_driver lm87_driver = { | |
165 | .owner = THIS_MODULE, | |
166 | .name = "lm87", | |
167 | .id = I2C_DRIVERID_LM87, | |
168 | .flags = I2C_DF_NOTIFY, | |
169 | .attach_adapter = lm87_attach_adapter, | |
170 | .detach_client = lm87_detach_client, | |
171 | }; | |
172 | ||
173 | /* | |
174 | * Client data (each client gets its own) | |
175 | */ | |
176 | ||
177 | struct lm87_data { | |
178 | struct i2c_client client; | |
179 | struct semaphore update_lock; | |
180 | char valid; /* zero until following fields are valid */ | |
181 | unsigned long last_updated; /* In jiffies */ | |
182 | ||
183 | u8 channel; /* register value */ | |
184 | ||
185 | u8 in[8]; /* register value */ | |
186 | u8 in_max[8]; /* register value */ | |
187 | u8 in_min[8]; /* register value */ | |
188 | u16 in_scale[8]; | |
189 | ||
190 | s8 temp[3]; /* register value */ | |
191 | s8 temp_high[3]; /* register value */ | |
192 | s8 temp_low[3]; /* register value */ | |
193 | s8 temp_crit_int; /* min of two register values */ | |
194 | s8 temp_crit_ext; /* min of two register values */ | |
195 | ||
196 | u8 fan[2]; /* register value */ | |
197 | u8 fan_min[2]; /* register value */ | |
198 | u8 fan_div[2]; /* register value, shifted right */ | |
199 | u8 aout; /* register value */ | |
200 | ||
201 | u16 alarms; /* register values, combined */ | |
202 | u8 vid; /* register values, combined */ | |
203 | u8 vrm; | |
204 | }; | |
205 | ||
206 | /* | |
207 | * Sysfs stuff | |
208 | */ | |
209 | ||
210 | static inline int lm87_read_value(struct i2c_client *client, u8 reg) | |
211 | { | |
212 | return i2c_smbus_read_byte_data(client, reg); | |
213 | } | |
214 | ||
215 | static inline int lm87_write_value(struct i2c_client *client, u8 reg, u8 value) | |
216 | { | |
217 | return i2c_smbus_write_byte_data(client, reg, value); | |
218 | } | |
219 | ||
220 | #define show_in(offset) \ | |
221 | static ssize_t show_in##offset##_input(struct device *dev, char *buf) \ | |
222 | { \ | |
223 | struct lm87_data *data = lm87_update_device(dev); \ | |
224 | return sprintf(buf, "%u\n", IN_FROM_REG(data->in[offset], \ | |
225 | data->in_scale[offset])); \ | |
226 | } \ | |
227 | static ssize_t show_in##offset##_min(struct device *dev, char *buf) \ | |
228 | { \ | |
229 | struct lm87_data *data = lm87_update_device(dev); \ | |
230 | return sprintf(buf, "%u\n", IN_FROM_REG(data->in_min[offset], \ | |
231 | data->in_scale[offset])); \ | |
232 | } \ | |
233 | static ssize_t show_in##offset##_max(struct device *dev, char *buf) \ | |
234 | { \ | |
235 | struct lm87_data *data = lm87_update_device(dev); \ | |
236 | return sprintf(buf, "%u\n", IN_FROM_REG(data->in_max[offset], \ | |
237 | data->in_scale[offset])); \ | |
238 | } \ | |
239 | static DEVICE_ATTR(in##offset##_input, S_IRUGO, \ | |
240 | show_in##offset##_input, NULL); | |
241 | show_in(0); | |
242 | show_in(1); | |
243 | show_in(2); | |
244 | show_in(3); | |
245 | show_in(4); | |
246 | show_in(5); | |
247 | show_in(6); | |
248 | show_in(7); | |
249 | ||
250 | static void set_in_min(struct device *dev, const char *buf, int nr) | |
251 | { | |
252 | struct i2c_client *client = to_i2c_client(dev); | |
253 | struct lm87_data *data = i2c_get_clientdata(client); | |
254 | long val = simple_strtol(buf, NULL, 10); | |
255 | ||
256 | down(&data->update_lock); | |
257 | data->in_min[nr] = IN_TO_REG(val, data->in_scale[nr]); | |
258 | lm87_write_value(client, nr<6 ? LM87_REG_IN_MIN(nr) : | |
259 | LM87_REG_AIN_MIN(nr-6), data->in_min[nr]); | |
260 | up(&data->update_lock); | |
261 | } | |
262 | ||
263 | static void set_in_max(struct device *dev, const char *buf, int nr) | |
264 | { | |
265 | struct i2c_client *client = to_i2c_client(dev); | |
266 | struct lm87_data *data = i2c_get_clientdata(client); | |
267 | long val = simple_strtol(buf, NULL, 10); | |
268 | ||
269 | down(&data->update_lock); | |
270 | data->in_max[nr] = IN_TO_REG(val, data->in_scale[nr]); | |
271 | lm87_write_value(client, nr<6 ? LM87_REG_IN_MAX(nr) : | |
272 | LM87_REG_AIN_MAX(nr-6), data->in_max[nr]); | |
273 | up(&data->update_lock); | |
274 | } | |
275 | ||
276 | #define set_in(offset) \ | |
277 | static ssize_t set_in##offset##_min(struct device *dev, \ | |
278 | const char *buf, size_t count) \ | |
279 | { \ | |
280 | set_in_min(dev, buf, offset); \ | |
281 | return count; \ | |
282 | } \ | |
283 | static ssize_t set_in##offset##_max(struct device *dev, \ | |
284 | const char *buf, size_t count) \ | |
285 | { \ | |
286 | set_in_max(dev, buf, offset); \ | |
287 | return count; \ | |
288 | } \ | |
289 | static DEVICE_ATTR(in##offset##_min, S_IRUGO | S_IWUSR, \ | |
290 | show_in##offset##_min, set_in##offset##_min); \ | |
291 | static DEVICE_ATTR(in##offset##_max, S_IRUGO | S_IWUSR, \ | |
292 | show_in##offset##_max, set_in##offset##_max); | |
293 | set_in(0); | |
294 | set_in(1); | |
295 | set_in(2); | |
296 | set_in(3); | |
297 | set_in(4); | |
298 | set_in(5); | |
299 | set_in(6); | |
300 | set_in(7); | |
301 | ||
302 | #define show_temp(offset) \ | |
303 | static ssize_t show_temp##offset##_input(struct device *dev, char *buf) \ | |
304 | { \ | |
305 | struct lm87_data *data = lm87_update_device(dev); \ | |
306 | return sprintf(buf, "%d\n", TEMP_FROM_REG(data->temp[offset-1])); \ | |
307 | } \ | |
308 | static ssize_t show_temp##offset##_low(struct device *dev, char *buf) \ | |
309 | { \ | |
310 | struct lm87_data *data = lm87_update_device(dev); \ | |
311 | return sprintf(buf, "%d\n", TEMP_FROM_REG(data->temp_low[offset-1])); \ | |
312 | } \ | |
313 | static ssize_t show_temp##offset##_high(struct device *dev, char *buf) \ | |
314 | { \ | |
315 | struct lm87_data *data = lm87_update_device(dev); \ | |
316 | return sprintf(buf, "%d\n", TEMP_FROM_REG(data->temp_high[offset-1])); \ | |
317 | }\ | |
318 | static DEVICE_ATTR(temp##offset##_input, S_IRUGO, \ | |
319 | show_temp##offset##_input, NULL); | |
320 | show_temp(1); | |
321 | show_temp(2); | |
322 | show_temp(3); | |
323 | ||
324 | static void set_temp_low(struct device *dev, const char *buf, int nr) | |
325 | { | |
326 | struct i2c_client *client = to_i2c_client(dev); | |
327 | struct lm87_data *data = i2c_get_clientdata(client); | |
328 | long val = simple_strtol(buf, NULL, 10); | |
329 | ||
330 | down(&data->update_lock); | |
331 | data->temp_low[nr] = TEMP_TO_REG(val); | |
332 | lm87_write_value(client, LM87_REG_TEMP_LOW[nr], data->temp_low[nr]); | |
333 | up(&data->update_lock); | |
334 | } | |
335 | ||
336 | static void set_temp_high(struct device *dev, const char *buf, int nr) | |
337 | { | |
338 | struct i2c_client *client = to_i2c_client(dev); | |
339 | struct lm87_data *data = i2c_get_clientdata(client); | |
340 | long val = simple_strtol(buf, NULL, 10); | |
341 | ||
342 | down(&data->update_lock); | |
343 | data->temp_high[nr] = TEMP_TO_REG(val); | |
344 | lm87_write_value(client, LM87_REG_TEMP_HIGH[nr], data->temp_high[nr]); | |
345 | up(&data->update_lock); | |
346 | } | |
347 | ||
348 | #define set_temp(offset) \ | |
349 | static ssize_t set_temp##offset##_low(struct device *dev, \ | |
350 | const char *buf, size_t count) \ | |
351 | { \ | |
352 | set_temp_low(dev, buf, offset-1); \ | |
353 | return count; \ | |
354 | } \ | |
355 | static ssize_t set_temp##offset##_high(struct device *dev, \ | |
356 | const char *buf, size_t count) \ | |
357 | { \ | |
358 | set_temp_high(dev, buf, offset-1); \ | |
359 | return count; \ | |
360 | } \ | |
361 | static DEVICE_ATTR(temp##offset##_max, S_IRUGO | S_IWUSR, \ | |
362 | show_temp##offset##_high, set_temp##offset##_high); \ | |
363 | static DEVICE_ATTR(temp##offset##_min, S_IRUGO | S_IWUSR, \ | |
364 | show_temp##offset##_low, set_temp##offset##_low); | |
365 | set_temp(1); | |
366 | set_temp(2); | |
367 | set_temp(3); | |
368 | ||
369 | static ssize_t show_temp_crit_int(struct device *dev, char *buf) | |
370 | { | |
371 | struct lm87_data *data = lm87_update_device(dev); | |
372 | return sprintf(buf, "%d\n", TEMP_FROM_REG(data->temp_crit_int)); | |
373 | } | |
374 | ||
375 | static ssize_t show_temp_crit_ext(struct device *dev, char *buf) | |
376 | { | |
377 | struct lm87_data *data = lm87_update_device(dev); | |
378 | return sprintf(buf, "%d\n", TEMP_FROM_REG(data->temp_crit_ext)); | |
379 | } | |
380 | ||
381 | static DEVICE_ATTR(temp1_crit, S_IRUGO, show_temp_crit_int, NULL); | |
382 | static DEVICE_ATTR(temp2_crit, S_IRUGO, show_temp_crit_ext, NULL); | |
383 | static DEVICE_ATTR(temp3_crit, S_IRUGO, show_temp_crit_ext, NULL); | |
384 | ||
385 | #define show_fan(offset) \ | |
386 | static ssize_t show_fan##offset##_input(struct device *dev, char *buf) \ | |
387 | { \ | |
388 | struct lm87_data *data = lm87_update_device(dev); \ | |
389 | return sprintf(buf, "%d\n", FAN_FROM_REG(data->fan[offset-1], \ | |
390 | FAN_DIV_FROM_REG(data->fan_div[offset-1]))); \ | |
391 | } \ | |
392 | static ssize_t show_fan##offset##_min(struct device *dev, char *buf) \ | |
393 | { \ | |
394 | struct lm87_data *data = lm87_update_device(dev); \ | |
395 | return sprintf(buf, "%d\n", FAN_FROM_REG(data->fan_min[offset-1], \ | |
396 | FAN_DIV_FROM_REG(data->fan_div[offset-1]))); \ | |
397 | } \ | |
398 | static ssize_t show_fan##offset##_div(struct device *dev, char *buf) \ | |
399 | { \ | |
400 | struct lm87_data *data = lm87_update_device(dev); \ | |
401 | return sprintf(buf, "%d\n", FAN_DIV_FROM_REG(data->fan_div[offset-1])); \ | |
402 | } \ | |
403 | static DEVICE_ATTR(fan##offset##_input, S_IRUGO, \ | |
404 | show_fan##offset##_input, NULL); | |
405 | show_fan(1); | |
406 | show_fan(2); | |
407 | ||
408 | static void set_fan_min(struct device *dev, const char *buf, int nr) | |
409 | { | |
410 | struct i2c_client *client = to_i2c_client(dev); | |
411 | struct lm87_data *data = i2c_get_clientdata(client); | |
412 | long val = simple_strtol(buf, NULL, 10); | |
413 | ||
414 | down(&data->update_lock); | |
415 | data->fan_min[nr] = FAN_TO_REG(val, | |
416 | FAN_DIV_FROM_REG(data->fan_div[nr])); | |
417 | lm87_write_value(client, LM87_REG_FAN_MIN(nr), data->fan_min[nr]); | |
418 | up(&data->update_lock); | |
419 | } | |
420 | ||
421 | /* Note: we save and restore the fan minimum here, because its value is | |
422 | determined in part by the fan clock divider. This follows the principle | |
423 | of least suprise; the user doesn't expect the fan minimum to change just | |
424 | because the divider changed. */ | |
425 | static ssize_t set_fan_div(struct device *dev, const char *buf, | |
426 | size_t count, int nr) | |
427 | { | |
428 | struct i2c_client *client = to_i2c_client(dev); | |
429 | struct lm87_data *data = i2c_get_clientdata(client); | |
430 | long val = simple_strtol(buf, NULL, 10); | |
431 | unsigned long min; | |
432 | u8 reg; | |
433 | ||
434 | down(&data->update_lock); | |
435 | min = FAN_FROM_REG(data->fan_min[nr], | |
436 | FAN_DIV_FROM_REG(data->fan_div[nr])); | |
437 | ||
438 | switch (val) { | |
439 | case 1: data->fan_div[nr] = 0; break; | |
440 | case 2: data->fan_div[nr] = 1; break; | |
441 | case 4: data->fan_div[nr] = 2; break; | |
442 | case 8: data->fan_div[nr] = 3; break; | |
443 | default: | |
444 | up(&data->update_lock); | |
445 | return -EINVAL; | |
446 | } | |
447 | ||
448 | reg = lm87_read_value(client, LM87_REG_VID_FAN_DIV); | |
449 | switch (nr) { | |
450 | case 0: | |
451 | reg = (reg & 0xCF) | (data->fan_div[0] << 4); | |
452 | break; | |
453 | case 1: | |
454 | reg = (reg & 0x3F) | (data->fan_div[1] << 6); | |
455 | break; | |
456 | } | |
457 | lm87_write_value(client, LM87_REG_VID_FAN_DIV, reg); | |
458 | ||
459 | data->fan_min[nr] = FAN_TO_REG(min, val); | |
460 | lm87_write_value(client, LM87_REG_FAN_MIN(nr), | |
461 | data->fan_min[nr]); | |
462 | up(&data->update_lock); | |
463 | ||
464 | return count; | |
465 | } | |
466 | ||
467 | #define set_fan(offset) \ | |
468 | static ssize_t set_fan##offset##_min(struct device *dev, const char *buf, \ | |
469 | size_t count) \ | |
470 | { \ | |
471 | set_fan_min(dev, buf, offset-1); \ | |
472 | return count; \ | |
473 | } \ | |
474 | static ssize_t set_fan##offset##_div(struct device *dev, const char *buf, \ | |
475 | size_t count) \ | |
476 | { \ | |
477 | return set_fan_div(dev, buf, count, offset-1); \ | |
478 | } \ | |
479 | static DEVICE_ATTR(fan##offset##_min, S_IRUGO | S_IWUSR, \ | |
480 | show_fan##offset##_min, set_fan##offset##_min); \ | |
481 | static DEVICE_ATTR(fan##offset##_div, S_IRUGO | S_IWUSR, \ | |
482 | show_fan##offset##_div, set_fan##offset##_div); | |
483 | set_fan(1); | |
484 | set_fan(2); | |
485 | ||
486 | static ssize_t show_alarms(struct device *dev, char *buf) | |
487 | { | |
488 | struct lm87_data *data = lm87_update_device(dev); | |
489 | return sprintf(buf, "%d\n", data->alarms); | |
490 | } | |
491 | static DEVICE_ATTR(alarms, S_IRUGO, show_alarms, NULL); | |
492 | ||
493 | static ssize_t show_vid(struct device *dev, char *buf) | |
494 | { | |
495 | struct lm87_data *data = lm87_update_device(dev); | |
496 | return sprintf(buf, "%d\n", vid_from_reg(data->vid, data->vrm)); | |
497 | } | |
498 | static DEVICE_ATTR(cpu0_vid, S_IRUGO, show_vid, NULL); | |
499 | ||
500 | static ssize_t show_vrm(struct device *dev, char *buf) | |
501 | { | |
502 | struct lm87_data *data = lm87_update_device(dev); | |
503 | return sprintf(buf, "%d\n", data->vrm); | |
504 | } | |
505 | static ssize_t set_vrm(struct device *dev, const char *buf, size_t count) | |
506 | { | |
507 | struct i2c_client *client = to_i2c_client(dev); | |
508 | struct lm87_data *data = i2c_get_clientdata(client); | |
509 | data->vrm = simple_strtoul(buf, NULL, 10); | |
510 | return count; | |
511 | } | |
512 | static DEVICE_ATTR(vrm, S_IRUGO | S_IWUSR, show_vrm, set_vrm); | |
513 | ||
514 | static ssize_t show_aout(struct device *dev, char *buf) | |
515 | { | |
516 | struct lm87_data *data = lm87_update_device(dev); | |
517 | return sprintf(buf, "%d\n", AOUT_FROM_REG(data->aout)); | |
518 | } | |
519 | static ssize_t set_aout(struct device *dev, const char *buf, size_t count) | |
520 | { | |
521 | struct i2c_client *client = to_i2c_client(dev); | |
522 | struct lm87_data *data = i2c_get_clientdata(client); | |
523 | long val = simple_strtol(buf, NULL, 10); | |
524 | ||
525 | down(&data->update_lock); | |
526 | data->aout = AOUT_TO_REG(val); | |
527 | lm87_write_value(client, LM87_REG_AOUT, data->aout); | |
528 | up(&data->update_lock); | |
529 | return count; | |
530 | } | |
531 | static DEVICE_ATTR(aout_output, S_IRUGO | S_IWUSR, show_aout, set_aout); | |
532 | ||
533 | /* | |
534 | * Real code | |
535 | */ | |
536 | ||
537 | static int lm87_attach_adapter(struct i2c_adapter *adapter) | |
538 | { | |
539 | if (!(adapter->class & I2C_CLASS_HWMON)) | |
540 | return 0; | |
541 | return i2c_detect(adapter, &addr_data, lm87_detect); | |
542 | } | |
543 | ||
544 | /* | |
545 | * The following function does more than just detection. If detection | |
546 | * succeeds, it also registers the new chip. | |
547 | */ | |
548 | static int lm87_detect(struct i2c_adapter *adapter, int address, int kind) | |
549 | { | |
550 | struct i2c_client *new_client; | |
551 | struct lm87_data *data; | |
552 | int err = 0; | |
553 | ||
554 | if (!i2c_check_functionality(adapter, I2C_FUNC_SMBUS_BYTE_DATA)) | |
555 | goto exit; | |
556 | ||
557 | if (!(data = kmalloc(sizeof(struct lm87_data), GFP_KERNEL))) { | |
558 | err = -ENOMEM; | |
559 | goto exit; | |
560 | } | |
561 | memset(data, 0, sizeof(struct lm87_data)); | |
562 | ||
563 | /* The common I2C client data is placed right before the | |
564 | LM87-specific data. */ | |
565 | new_client = &data->client; | |
566 | i2c_set_clientdata(new_client, data); | |
567 | new_client->addr = address; | |
568 | new_client->adapter = adapter; | |
569 | new_client->driver = &lm87_driver; | |
570 | new_client->flags = 0; | |
571 | ||
572 | /* Default to an LM87 if forced */ | |
573 | if (kind == 0) | |
574 | kind = lm87; | |
575 | ||
576 | /* Now, we do the remaining detection. */ | |
577 | if (kind < 0) { | |
578 | u8 rev = lm87_read_value(new_client, LM87_REG_REVISION); | |
579 | ||
580 | if (rev < 0x01 || rev > 0x08 | |
581 | || (lm87_read_value(new_client, LM87_REG_CONFIG) & 0x80) | |
582 | || lm87_read_value(new_client, LM87_REG_COMPANY_ID) != 0x02) { | |
583 | dev_dbg(&adapter->dev, | |
584 | "LM87 detection failed at 0x%02x.\n", | |
585 | address); | |
586 | goto exit_free; | |
587 | } | |
588 | } | |
589 | ||
590 | /* We can fill in the remaining client fields */ | |
591 | strlcpy(new_client->name, "lm87", I2C_NAME_SIZE); | |
592 | data->valid = 0; | |
593 | init_MUTEX(&data->update_lock); | |
594 | ||
595 | /* Tell the I2C layer a new client has arrived */ | |
596 | if ((err = i2c_attach_client(new_client))) | |
597 | goto exit_free; | |
598 | ||
599 | /* Initialize the LM87 chip */ | |
600 | lm87_init_client(new_client); | |
601 | ||
602 | data->in_scale[0] = 2500; | |
603 | data->in_scale[1] = 2700; | |
604 | data->in_scale[2] = (data->channel & CHAN_VCC_5V) ? 5000 : 3300; | |
605 | data->in_scale[3] = 5000; | |
606 | data->in_scale[4] = 12000; | |
607 | data->in_scale[5] = 2700; | |
608 | data->in_scale[6] = 1875; | |
609 | data->in_scale[7] = 1875; | |
610 | ||
611 | /* Register sysfs hooks */ | |
612 | device_create_file(&new_client->dev, &dev_attr_in1_input); | |
613 | device_create_file(&new_client->dev, &dev_attr_in1_min); | |
614 | device_create_file(&new_client->dev, &dev_attr_in1_max); | |
615 | device_create_file(&new_client->dev, &dev_attr_in2_input); | |
616 | device_create_file(&new_client->dev, &dev_attr_in2_min); | |
617 | device_create_file(&new_client->dev, &dev_attr_in2_max); | |
618 | device_create_file(&new_client->dev, &dev_attr_in3_input); | |
619 | device_create_file(&new_client->dev, &dev_attr_in3_min); | |
620 | device_create_file(&new_client->dev, &dev_attr_in3_max); | |
621 | device_create_file(&new_client->dev, &dev_attr_in4_input); | |
622 | device_create_file(&new_client->dev, &dev_attr_in4_min); | |
623 | device_create_file(&new_client->dev, &dev_attr_in4_max); | |
624 | ||
625 | if (data->channel & CHAN_NO_FAN(0)) { | |
626 | device_create_file(&new_client->dev, &dev_attr_in6_input); | |
627 | device_create_file(&new_client->dev, &dev_attr_in6_min); | |
628 | device_create_file(&new_client->dev, &dev_attr_in6_max); | |
629 | } else { | |
630 | device_create_file(&new_client->dev, &dev_attr_fan1_input); | |
631 | device_create_file(&new_client->dev, &dev_attr_fan1_min); | |
632 | device_create_file(&new_client->dev, &dev_attr_fan1_div); | |
633 | } | |
634 | if (data->channel & CHAN_NO_FAN(1)) { | |
635 | device_create_file(&new_client->dev, &dev_attr_in7_input); | |
636 | device_create_file(&new_client->dev, &dev_attr_in7_min); | |
637 | device_create_file(&new_client->dev, &dev_attr_in7_max); | |
638 | } else { | |
639 | device_create_file(&new_client->dev, &dev_attr_fan2_input); | |
640 | device_create_file(&new_client->dev, &dev_attr_fan2_min); | |
641 | device_create_file(&new_client->dev, &dev_attr_fan2_div); | |
642 | } | |
643 | ||
644 | device_create_file(&new_client->dev, &dev_attr_temp1_input); | |
645 | device_create_file(&new_client->dev, &dev_attr_temp1_max); | |
646 | device_create_file(&new_client->dev, &dev_attr_temp1_min); | |
647 | device_create_file(&new_client->dev, &dev_attr_temp1_crit); | |
648 | device_create_file(&new_client->dev, &dev_attr_temp2_input); | |
649 | device_create_file(&new_client->dev, &dev_attr_temp2_max); | |
650 | device_create_file(&new_client->dev, &dev_attr_temp2_min); | |
651 | device_create_file(&new_client->dev, &dev_attr_temp2_crit); | |
652 | ||
653 | if (data->channel & CHAN_TEMP3) { | |
654 | device_create_file(&new_client->dev, &dev_attr_temp3_input); | |
655 | device_create_file(&new_client->dev, &dev_attr_temp3_max); | |
656 | device_create_file(&new_client->dev, &dev_attr_temp3_min); | |
657 | device_create_file(&new_client->dev, &dev_attr_temp3_crit); | |
658 | } else { | |
659 | device_create_file(&new_client->dev, &dev_attr_in0_input); | |
660 | device_create_file(&new_client->dev, &dev_attr_in0_min); | |
661 | device_create_file(&new_client->dev, &dev_attr_in0_max); | |
662 | device_create_file(&new_client->dev, &dev_attr_in5_input); | |
663 | device_create_file(&new_client->dev, &dev_attr_in5_min); | |
664 | device_create_file(&new_client->dev, &dev_attr_in5_max); | |
665 | } | |
666 | ||
667 | if (!(data->channel & CHAN_NO_VID)) { | |
668 | device_create_file(&new_client->dev, &dev_attr_cpu0_vid); | |
669 | device_create_file(&new_client->dev, &dev_attr_vrm); | |
670 | } | |
671 | ||
672 | device_create_file(&new_client->dev, &dev_attr_alarms); | |
673 | device_create_file(&new_client->dev, &dev_attr_aout_output); | |
674 | ||
675 | return 0; | |
676 | ||
677 | exit_free: | |
678 | kfree(data); | |
679 | exit: | |
680 | return err; | |
681 | } | |
682 | ||
683 | static void lm87_init_client(struct i2c_client *client) | |
684 | { | |
685 | struct lm87_data *data = i2c_get_clientdata(client); | |
686 | u8 config; | |
687 | ||
688 | data->channel = lm87_read_value(client, LM87_REG_CHANNEL_MODE); | |
689 | data->vrm = i2c_which_vrm(); | |
690 | ||
691 | config = lm87_read_value(client, LM87_REG_CONFIG); | |
692 | if (!(config & 0x01)) { | |
693 | int i; | |
694 | ||
695 | /* Limits are left uninitialized after power-up */ | |
696 | for (i = 1; i < 6; i++) { | |
697 | lm87_write_value(client, LM87_REG_IN_MIN(i), 0x00); | |
698 | lm87_write_value(client, LM87_REG_IN_MAX(i), 0xFF); | |
699 | } | |
700 | for (i = 0; i < 2; i++) { | |
701 | lm87_write_value(client, LM87_REG_TEMP_HIGH[i], 0x7F); | |
702 | lm87_write_value(client, LM87_REG_TEMP_LOW[i], 0x00); | |
703 | lm87_write_value(client, LM87_REG_AIN_MIN(i), 0x00); | |
704 | lm87_write_value(client, LM87_REG_AIN_MAX(i), 0xFF); | |
705 | } | |
706 | if (data->channel & CHAN_TEMP3) { | |
707 | lm87_write_value(client, LM87_REG_TEMP_HIGH[2], 0x7F); | |
708 | lm87_write_value(client, LM87_REG_TEMP_LOW[2], 0x00); | |
709 | } else { | |
710 | lm87_write_value(client, LM87_REG_IN_MIN(0), 0x00); | |
711 | lm87_write_value(client, LM87_REG_IN_MAX(0), 0xFF); | |
712 | } | |
713 | } | |
714 | if ((config & 0x81) != 0x01) { | |
715 | /* Start monitoring */ | |
716 | lm87_write_value(client, LM87_REG_CONFIG, | |
717 | (config & 0xF7) | 0x01); | |
718 | } | |
719 | } | |
720 | ||
721 | static int lm87_detach_client(struct i2c_client *client) | |
722 | { | |
723 | int err; | |
724 | ||
725 | if ((err = i2c_detach_client(client))) { | |
726 | dev_err(&client->dev, "Client deregistration failed, " | |
727 | "client not detached.\n"); | |
728 | return err; | |
729 | } | |
730 | ||
731 | kfree(i2c_get_clientdata(client)); | |
732 | return 0; | |
733 | } | |
734 | ||
735 | static struct lm87_data *lm87_update_device(struct device *dev) | |
736 | { | |
737 | struct i2c_client *client = to_i2c_client(dev); | |
738 | struct lm87_data *data = i2c_get_clientdata(client); | |
739 | ||
740 | down(&data->update_lock); | |
741 | ||
742 | if (time_after(jiffies, data->last_updated + HZ) || !data->valid) { | |
743 | int i, j; | |
744 | ||
745 | dev_dbg(&client->dev, "Updating data.\n"); | |
746 | ||
747 | i = (data->channel & CHAN_TEMP3) ? 1 : 0; | |
748 | j = (data->channel & CHAN_TEMP3) ? 5 : 6; | |
749 | for (; i < j; i++) { | |
750 | data->in[i] = lm87_read_value(client, | |
751 | LM87_REG_IN(i)); | |
752 | data->in_min[i] = lm87_read_value(client, | |
753 | LM87_REG_IN_MIN(i)); | |
754 | data->in_max[i] = lm87_read_value(client, | |
755 | LM87_REG_IN_MAX(i)); | |
756 | } | |
757 | ||
758 | for (i = 0; i < 2; i++) { | |
759 | if (data->channel & CHAN_NO_FAN(i)) { | |
760 | data->in[6+i] = lm87_read_value(client, | |
761 | LM87_REG_AIN(i)); | |
762 | data->in_max[6+i] = lm87_read_value(client, | |
763 | LM87_REG_AIN_MAX(i)); | |
764 | data->in_min[6+i] = lm87_read_value(client, | |
765 | LM87_REG_AIN_MIN(i)); | |
766 | ||
767 | } else { | |
768 | data->fan[i] = lm87_read_value(client, | |
769 | LM87_REG_FAN(i)); | |
770 | data->fan_min[i] = lm87_read_value(client, | |
771 | LM87_REG_FAN_MIN(i)); | |
772 | } | |
773 | } | |
774 | ||
775 | j = (data->channel & CHAN_TEMP3) ? 3 : 2; | |
776 | for (i = 0 ; i < j; i++) { | |
777 | data->temp[i] = lm87_read_value(client, | |
778 | LM87_REG_TEMP[i]); | |
779 | data->temp_high[i] = lm87_read_value(client, | |
780 | LM87_REG_TEMP_HIGH[i]); | |
781 | data->temp_low[i] = lm87_read_value(client, | |
782 | LM87_REG_TEMP_LOW[i]); | |
783 | } | |
784 | ||
785 | i = lm87_read_value(client, LM87_REG_TEMP_HW_INT_LOCK); | |
786 | j = lm87_read_value(client, LM87_REG_TEMP_HW_INT); | |
787 | data->temp_crit_int = min(i, j); | |
788 | ||
789 | i = lm87_read_value(client, LM87_REG_TEMP_HW_EXT_LOCK); | |
790 | j = lm87_read_value(client, LM87_REG_TEMP_HW_EXT); | |
791 | data->temp_crit_ext = min(i, j); | |
792 | ||
793 | i = lm87_read_value(client, LM87_REG_VID_FAN_DIV); | |
794 | data->fan_div[0] = (i >> 4) & 0x03; | |
795 | data->fan_div[1] = (i >> 6) & 0x03; | |
796 | data->vid = (i & 0x0F) | |
797 | | (lm87_read_value(client, LM87_REG_VID4) & 0x01) | |
798 | << 4; | |
799 | ||
800 | data->alarms = lm87_read_value(client, LM87_REG_ALARMS1) | |
801 | | (lm87_read_value(client, LM87_REG_ALARMS2) | |
802 | << 8); | |
803 | data->aout = lm87_read_value(client, LM87_REG_AOUT); | |
804 | ||
805 | data->last_updated = jiffies; | |
806 | data->valid = 1; | |
807 | } | |
808 | ||
809 | up(&data->update_lock); | |
810 | ||
811 | return data; | |
812 | } | |
813 | ||
814 | static int __init sensors_lm87_init(void) | |
815 | { | |
816 | return i2c_add_driver(&lm87_driver); | |
817 | } | |
818 | ||
819 | static void __exit sensors_lm87_exit(void) | |
820 | { | |
821 | i2c_del_driver(&lm87_driver); | |
822 | } | |
823 | ||
824 | MODULE_AUTHOR("Jean Delvare <khali@linux-fr.org> and others"); | |
825 | MODULE_DESCRIPTION("LM87 driver"); | |
826 | MODULE_LICENSE("GPL"); | |
827 | ||
828 | module_init(sensors_lm87_init); | |
829 | module_exit(sensors_lm87_exit); |