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-rw-r--r--drivers/hwmon/lm87.c828
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diff --git a/drivers/hwmon/lm87.c b/drivers/hwmon/lm87.c
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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 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/module.h>
56#include <linux/init.h>
57#include <linux/slab.h>
58#include <linux/jiffies.h>
59#include <linux/i2c.h>
60#include <linux/i2c-sensor.h>
61#include <linux/i2c-vid.h>
62
63/*
64 * Addresses to scan
65 * LM87 has three possible addresses: 0x2c, 0x2d and 0x2e.
66 */
67
68static unsigned short normal_i2c[] = { 0x2c, 0x2d, 0x2e, I2C_CLIENT_END };
69static unsigned int normal_isa[] = { I2C_CLIENT_ISA_END };
70
71/*
72 * Insmod parameters
73 */
74
75SENSORS_INSMOD_1(lm87);
76
77/*
78 * The LM87 registers
79 */
80
81/* nr in 0..5 */
82#define LM87_REG_IN(nr) (0x20 + (nr))
83#define LM87_REG_IN_MAX(nr) (0x2B + (nr) * 2)
84#define LM87_REG_IN_MIN(nr) (0x2C + (nr) * 2)
85/* nr in 0..1 */
86#define LM87_REG_AIN(nr) (0x28 + (nr))
87#define LM87_REG_AIN_MIN(nr) (0x1A + (nr))
88#define LM87_REG_AIN_MAX(nr) (0x3B + (nr))
89
90static u8 LM87_REG_TEMP[3] = { 0x27, 0x26, 0x20 };
91static u8 LM87_REG_TEMP_HIGH[3] = { 0x39, 0x37, 0x2B };
92static u8 LM87_REG_TEMP_LOW[3] = { 0x3A, 0x38, 0x2C };
93
94#define LM87_REG_TEMP_HW_INT_LOCK 0x13
95#define LM87_REG_TEMP_HW_EXT_LOCK 0x14
96#define LM87_REG_TEMP_HW_INT 0x17
97#define LM87_REG_TEMP_HW_EXT 0x18
98
99/* nr in 0..1 */
100#define LM87_REG_FAN(nr) (0x28 + (nr))
101#define LM87_REG_FAN_MIN(nr) (0x3B + (nr))
102#define LM87_REG_AOUT 0x19
103
104#define LM87_REG_CONFIG 0x40
105#define LM87_REG_CHANNEL_MODE 0x16
106#define LM87_REG_VID_FAN_DIV 0x47
107#define LM87_REG_VID4 0x49
108
109#define LM87_REG_ALARMS1 0x41
110#define LM87_REG_ALARMS2 0x42
111
112#define LM87_REG_COMPANY_ID 0x3E
113#define LM87_REG_REVISION 0x3F
114
115/*
116 * Conversions and various macros
117 * The LM87 uses signed 8-bit values for temperatures.
118 */
119
120#define IN_FROM_REG(reg,scale) (((reg) * (scale) + 96) / 192)
121#define IN_TO_REG(val,scale) ((val) <= 0 ? 0 : \
122 (val) * 192 >= (scale) * 255 ? 255 : \
123 ((val) * 192 + (scale)/2) / (scale))
124
125#define TEMP_FROM_REG(reg) ((reg) * 1000)
126#define TEMP_TO_REG(val) ((val) <= -127500 ? -128 : \
127 (val) >= 126500 ? 127 : \
128 (((val) < 0 ? (val)-500 : (val)+500) / 1000))
129
130#define FAN_FROM_REG(reg,div) ((reg) == 255 || (reg) == 0 ? 0 : \
131 1350000 + (reg)*(div) / 2) / ((reg)*(div))
132#define FAN_TO_REG(val,div) ((val)*(div) * 255 <= 1350000 ? 255 : \
133 (1350000 + (val)*(div) / 2) / ((val)*(div)))
134
135#define FAN_DIV_FROM_REG(reg) (1 << (reg))
136
137/* analog out is 9.80mV/LSB */
138#define AOUT_FROM_REG(reg) (((reg) * 98 + 5) / 10)
139#define AOUT_TO_REG(val) ((val) <= 0 ? 0 : \
140 (val) >= 2500 ? 255 : \
141 ((val) * 10 + 49) / 98)
142
143/* nr in 0..1 */
144#define CHAN_NO_FAN(nr) (1 << (nr))
145#define CHAN_TEMP3 (1 << 2)
146#define CHAN_VCC_5V (1 << 3)
147#define CHAN_NO_VID (1 << 8)
148
149/*
150 * Functions declaration
151 */
152
153static int lm87_attach_adapter(struct i2c_adapter *adapter);
154static int lm87_detect(struct i2c_adapter *adapter, int address, int kind);
155static void lm87_init_client(struct i2c_client *client);
156static int lm87_detach_client(struct i2c_client *client);
157static struct lm87_data *lm87_update_device(struct device *dev);
158
159/*
160 * Driver data (common to all clients)
161 */
162
163static struct i2c_driver lm87_driver = {
164 .owner = THIS_MODULE,
165 .name = "lm87",
166 .id = I2C_DRIVERID_LM87,
167 .flags = I2C_DF_NOTIFY,
168 .attach_adapter = lm87_attach_adapter,
169 .detach_client = lm87_detach_client,
170};
171
172/*
173 * Client data (each client gets its own)
174 */
175
176struct lm87_data {
177 struct i2c_client client;
178 struct semaphore update_lock;
179 char valid; /* zero until following fields are valid */
180 unsigned long last_updated; /* In jiffies */
181
182 u8 channel; /* register value */
183
184 u8 in[8]; /* register value */
185 u8 in_max[8]; /* register value */
186 u8 in_min[8]; /* register value */
187 u16 in_scale[8];
188
189 s8 temp[3]; /* register value */
190 s8 temp_high[3]; /* register value */
191 s8 temp_low[3]; /* register value */
192 s8 temp_crit_int; /* min of two register values */
193 s8 temp_crit_ext; /* min of two register values */
194
195 u8 fan[2]; /* register value */
196 u8 fan_min[2]; /* register value */
197 u8 fan_div[2]; /* register value, shifted right */
198 u8 aout; /* register value */
199
200 u16 alarms; /* register values, combined */
201 u8 vid; /* register values, combined */
202 u8 vrm;
203};
204
205/*
206 * Sysfs stuff
207 */
208
209static inline int lm87_read_value(struct i2c_client *client, u8 reg)
210{
211 return i2c_smbus_read_byte_data(client, reg);
212}
213
214static inline int lm87_write_value(struct i2c_client *client, u8 reg, u8 value)
215{
216 return i2c_smbus_write_byte_data(client, reg, value);
217}
218
219#define show_in(offset) \
220static ssize_t show_in##offset##_input(struct device *dev, struct device_attribute *attr, char *buf) \
221{ \
222 struct lm87_data *data = lm87_update_device(dev); \
223 return sprintf(buf, "%u\n", IN_FROM_REG(data->in[offset], \
224 data->in_scale[offset])); \
225} \
226static ssize_t show_in##offset##_min(struct device *dev, struct device_attribute *attr, char *buf) \
227{ \
228 struct lm87_data *data = lm87_update_device(dev); \
229 return sprintf(buf, "%u\n", IN_FROM_REG(data->in_min[offset], \
230 data->in_scale[offset])); \
231} \
232static ssize_t show_in##offset##_max(struct device *dev, struct device_attribute *attr, char *buf) \
233{ \
234 struct lm87_data *data = lm87_update_device(dev); \
235 return sprintf(buf, "%u\n", IN_FROM_REG(data->in_max[offset], \
236 data->in_scale[offset])); \
237} \
238static DEVICE_ATTR(in##offset##_input, S_IRUGO, \
239 show_in##offset##_input, NULL);
240show_in(0);
241show_in(1);
242show_in(2);
243show_in(3);
244show_in(4);
245show_in(5);
246show_in(6);
247show_in(7);
248
249static void set_in_min(struct device *dev, const char *buf, int nr)
250{
251 struct i2c_client *client = to_i2c_client(dev);
252 struct lm87_data *data = i2c_get_clientdata(client);
253 long val = simple_strtol(buf, NULL, 10);
254
255 down(&data->update_lock);
256 data->in_min[nr] = IN_TO_REG(val, data->in_scale[nr]);
257 lm87_write_value(client, nr<6 ? LM87_REG_IN_MIN(nr) :
258 LM87_REG_AIN_MIN(nr-6), data->in_min[nr]);
259 up(&data->update_lock);
260}
261
262static void set_in_max(struct device *dev, const char *buf, int nr)
263{
264 struct i2c_client *client = to_i2c_client(dev);
265 struct lm87_data *data = i2c_get_clientdata(client);
266 long val = simple_strtol(buf, NULL, 10);
267
268 down(&data->update_lock);
269 data->in_max[nr] = IN_TO_REG(val, data->in_scale[nr]);
270 lm87_write_value(client, nr<6 ? LM87_REG_IN_MAX(nr) :
271 LM87_REG_AIN_MAX(nr-6), data->in_max[nr]);
272 up(&data->update_lock);
273}
274
275#define set_in(offset) \
276static ssize_t set_in##offset##_min(struct device *dev, struct device_attribute *attr, \
277 const char *buf, size_t count) \
278{ \
279 set_in_min(dev, buf, offset); \
280 return count; \
281} \
282static ssize_t set_in##offset##_max(struct device *dev, struct device_attribute *attr, \
283 const char *buf, size_t count) \
284{ \
285 set_in_max(dev, buf, offset); \
286 return count; \
287} \
288static DEVICE_ATTR(in##offset##_min, S_IRUGO | S_IWUSR, \
289 show_in##offset##_min, set_in##offset##_min); \
290static DEVICE_ATTR(in##offset##_max, S_IRUGO | S_IWUSR, \
291 show_in##offset##_max, set_in##offset##_max);
292set_in(0);
293set_in(1);
294set_in(2);
295set_in(3);
296set_in(4);
297set_in(5);
298set_in(6);
299set_in(7);
300
301#define show_temp(offset) \
302static ssize_t show_temp##offset##_input(struct device *dev, struct device_attribute *attr, char *buf) \
303{ \
304 struct lm87_data *data = lm87_update_device(dev); \
305 return sprintf(buf, "%d\n", TEMP_FROM_REG(data->temp[offset-1])); \
306} \
307static ssize_t show_temp##offset##_low(struct device *dev, struct device_attribute *attr, char *buf) \
308{ \
309 struct lm87_data *data = lm87_update_device(dev); \
310 return sprintf(buf, "%d\n", TEMP_FROM_REG(data->temp_low[offset-1])); \
311} \
312static ssize_t show_temp##offset##_high(struct device *dev, struct device_attribute *attr, char *buf) \
313{ \
314 struct lm87_data *data = lm87_update_device(dev); \
315 return sprintf(buf, "%d\n", TEMP_FROM_REG(data->temp_high[offset-1])); \
316}\
317static DEVICE_ATTR(temp##offset##_input, S_IRUGO, \
318 show_temp##offset##_input, NULL);
319show_temp(1);
320show_temp(2);
321show_temp(3);
322
323static void set_temp_low(struct device *dev, const char *buf, int nr)
324{
325 struct i2c_client *client = to_i2c_client(dev);
326 struct lm87_data *data = i2c_get_clientdata(client);
327 long val = simple_strtol(buf, NULL, 10);
328
329 down(&data->update_lock);
330 data->temp_low[nr] = TEMP_TO_REG(val);
331 lm87_write_value(client, LM87_REG_TEMP_LOW[nr], data->temp_low[nr]);
332 up(&data->update_lock);
333}
334
335static void set_temp_high(struct device *dev, const char *buf, int nr)
336{
337 struct i2c_client *client = to_i2c_client(dev);
338 struct lm87_data *data = i2c_get_clientdata(client);
339 long val = simple_strtol(buf, NULL, 10);
340
341 down(&data->update_lock);
342 data->temp_high[nr] = TEMP_TO_REG(val);
343 lm87_write_value(client, LM87_REG_TEMP_HIGH[nr], data->temp_high[nr]);
344 up(&data->update_lock);
345}
346
347#define set_temp(offset) \
348static ssize_t set_temp##offset##_low(struct device *dev, struct device_attribute *attr, \
349 const char *buf, size_t count) \
350{ \
351 set_temp_low(dev, buf, offset-1); \
352 return count; \
353} \
354static ssize_t set_temp##offset##_high(struct device *dev, struct device_attribute *attr, \
355 const char *buf, size_t count) \
356{ \
357 set_temp_high(dev, buf, offset-1); \
358 return count; \
359} \
360static DEVICE_ATTR(temp##offset##_max, S_IRUGO | S_IWUSR, \
361 show_temp##offset##_high, set_temp##offset##_high); \
362static DEVICE_ATTR(temp##offset##_min, S_IRUGO | S_IWUSR, \
363 show_temp##offset##_low, set_temp##offset##_low);
364set_temp(1);
365set_temp(2);
366set_temp(3);
367
368static ssize_t show_temp_crit_int(struct device *dev, struct device_attribute *attr, char *buf)
369{
370 struct lm87_data *data = lm87_update_device(dev);
371 return sprintf(buf, "%d\n", TEMP_FROM_REG(data->temp_crit_int));
372}
373
374static ssize_t show_temp_crit_ext(struct device *dev, struct device_attribute *attr, char *buf)
375{
376 struct lm87_data *data = lm87_update_device(dev);
377 return sprintf(buf, "%d\n", TEMP_FROM_REG(data->temp_crit_ext));
378}
379
380static DEVICE_ATTR(temp1_crit, S_IRUGO, show_temp_crit_int, NULL);
381static DEVICE_ATTR(temp2_crit, S_IRUGO, show_temp_crit_ext, NULL);
382static DEVICE_ATTR(temp3_crit, S_IRUGO, show_temp_crit_ext, NULL);
383
384#define show_fan(offset) \
385static ssize_t show_fan##offset##_input(struct device *dev, struct device_attribute *attr, char *buf) \
386{ \
387 struct lm87_data *data = lm87_update_device(dev); \
388 return sprintf(buf, "%d\n", FAN_FROM_REG(data->fan[offset-1], \
389 FAN_DIV_FROM_REG(data->fan_div[offset-1]))); \
390} \
391static ssize_t show_fan##offset##_min(struct device *dev, struct device_attribute *attr, char *buf) \
392{ \
393 struct lm87_data *data = lm87_update_device(dev); \
394 return sprintf(buf, "%d\n", FAN_FROM_REG(data->fan_min[offset-1], \
395 FAN_DIV_FROM_REG(data->fan_div[offset-1]))); \
396} \
397static ssize_t show_fan##offset##_div(struct device *dev, struct device_attribute *attr, char *buf) \
398{ \
399 struct lm87_data *data = lm87_update_device(dev); \
400 return sprintf(buf, "%d\n", FAN_DIV_FROM_REG(data->fan_div[offset-1])); \
401} \
402static DEVICE_ATTR(fan##offset##_input, S_IRUGO, \
403 show_fan##offset##_input, NULL);
404show_fan(1);
405show_fan(2);
406
407static void set_fan_min(struct device *dev, const char *buf, int nr)
408{
409 struct i2c_client *client = to_i2c_client(dev);
410 struct lm87_data *data = i2c_get_clientdata(client);
411 long val = simple_strtol(buf, NULL, 10);
412
413 down(&data->update_lock);
414 data->fan_min[nr] = FAN_TO_REG(val,
415 FAN_DIV_FROM_REG(data->fan_div[nr]));
416 lm87_write_value(client, LM87_REG_FAN_MIN(nr), data->fan_min[nr]);
417 up(&data->update_lock);
418}
419
420/* Note: we save and restore the fan minimum here, because its value is
421 determined in part by the fan clock divider. This follows the principle
422 of least suprise; the user doesn't expect the fan minimum to change just
423 because the divider changed. */
424static ssize_t set_fan_div(struct device *dev, const char *buf,
425 size_t count, int nr)
426{
427 struct i2c_client *client = to_i2c_client(dev);
428 struct lm87_data *data = i2c_get_clientdata(client);
429 long val = simple_strtol(buf, NULL, 10);
430 unsigned long min;
431 u8 reg;
432
433 down(&data->update_lock);
434 min = FAN_FROM_REG(data->fan_min[nr],
435 FAN_DIV_FROM_REG(data->fan_div[nr]));
436
437 switch (val) {
438 case 1: data->fan_div[nr] = 0; break;
439 case 2: data->fan_div[nr] = 1; break;
440 case 4: data->fan_div[nr] = 2; break;
441 case 8: data->fan_div[nr] = 3; break;
442 default:
443 up(&data->update_lock);
444 return -EINVAL;
445 }
446
447 reg = lm87_read_value(client, LM87_REG_VID_FAN_DIV);
448 switch (nr) {
449 case 0:
450 reg = (reg & 0xCF) | (data->fan_div[0] << 4);
451 break;
452 case 1:
453 reg = (reg & 0x3F) | (data->fan_div[1] << 6);
454 break;
455 }
456 lm87_write_value(client, LM87_REG_VID_FAN_DIV, reg);
457
458 data->fan_min[nr] = FAN_TO_REG(min, val);
459 lm87_write_value(client, LM87_REG_FAN_MIN(nr),
460 data->fan_min[nr]);
461 up(&data->update_lock);
462
463 return count;
464}
465
466#define set_fan(offset) \
467static ssize_t set_fan##offset##_min(struct device *dev, struct device_attribute *attr, const char *buf, \
468 size_t count) \
469{ \
470 set_fan_min(dev, buf, offset-1); \
471 return count; \
472} \
473static ssize_t set_fan##offset##_div(struct device *dev, struct device_attribute *attr, const char *buf, \
474 size_t count) \
475{ \
476 return set_fan_div(dev, buf, count, offset-1); \
477} \
478static DEVICE_ATTR(fan##offset##_min, S_IRUGO | S_IWUSR, \
479 show_fan##offset##_min, set_fan##offset##_min); \
480static DEVICE_ATTR(fan##offset##_div, S_IRUGO | S_IWUSR, \
481 show_fan##offset##_div, set_fan##offset##_div);
482set_fan(1);
483set_fan(2);
484
485static ssize_t show_alarms(struct device *dev, struct device_attribute *attr, char *buf)
486{
487 struct lm87_data *data = lm87_update_device(dev);
488 return sprintf(buf, "%d\n", data->alarms);
489}
490static DEVICE_ATTR(alarms, S_IRUGO, show_alarms, NULL);
491
492static ssize_t show_vid(struct device *dev, struct device_attribute *attr, char *buf)
493{
494 struct lm87_data *data = lm87_update_device(dev);
495 return sprintf(buf, "%d\n", vid_from_reg(data->vid, data->vrm));
496}
497static DEVICE_ATTR(cpu0_vid, S_IRUGO, show_vid, NULL);
498
499static ssize_t show_vrm(struct device *dev, struct device_attribute *attr, char *buf)
500{
501 struct lm87_data *data = lm87_update_device(dev);
502 return sprintf(buf, "%d\n", data->vrm);
503}
504static ssize_t set_vrm(struct device *dev, struct device_attribute *attr, const char *buf, size_t count)
505{
506 struct i2c_client *client = to_i2c_client(dev);
507 struct lm87_data *data = i2c_get_clientdata(client);
508 data->vrm = simple_strtoul(buf, NULL, 10);
509 return count;
510}
511static DEVICE_ATTR(vrm, S_IRUGO | S_IWUSR, show_vrm, set_vrm);
512
513static ssize_t show_aout(struct device *dev, struct device_attribute *attr, char *buf)
514{
515 struct lm87_data *data = lm87_update_device(dev);
516 return sprintf(buf, "%d\n", AOUT_FROM_REG(data->aout));
517}
518static ssize_t set_aout(struct device *dev, struct device_attribute *attr, const char *buf, size_t count)
519{
520 struct i2c_client *client = to_i2c_client(dev);
521 struct lm87_data *data = i2c_get_clientdata(client);
522 long val = simple_strtol(buf, NULL, 10);
523
524 down(&data->update_lock);
525 data->aout = AOUT_TO_REG(val);
526 lm87_write_value(client, LM87_REG_AOUT, data->aout);
527 up(&data->update_lock);
528 return count;
529}
530static DEVICE_ATTR(aout_output, S_IRUGO | S_IWUSR, show_aout, set_aout);
531
532/*
533 * Real code
534 */
535
536static int lm87_attach_adapter(struct i2c_adapter *adapter)
537{
538 if (!(adapter->class & I2C_CLASS_HWMON))
539 return 0;
540 return i2c_detect(adapter, &addr_data, lm87_detect);
541}
542
543/*
544 * The following function does more than just detection. If detection
545 * succeeds, it also registers the new chip.
546 */
547static int lm87_detect(struct i2c_adapter *adapter, int address, int kind)
548{
549 struct i2c_client *new_client;
550 struct lm87_data *data;
551 int err = 0;
552
553 if (!i2c_check_functionality(adapter, I2C_FUNC_SMBUS_BYTE_DATA))
554 goto exit;
555
556 if (!(data = kmalloc(sizeof(struct lm87_data), GFP_KERNEL))) {
557 err = -ENOMEM;
558 goto exit;
559 }
560 memset(data, 0, sizeof(struct lm87_data));
561
562 /* The common I2C client data is placed right before the
563 LM87-specific data. */
564 new_client = &data->client;
565 i2c_set_clientdata(new_client, data);
566 new_client->addr = address;
567 new_client->adapter = adapter;
568 new_client->driver = &lm87_driver;
569 new_client->flags = 0;
570
571 /* Default to an LM87 if forced */
572 if (kind == 0)
573 kind = lm87;
574
575 /* Now, we do the remaining detection. */
576 if (kind < 0) {
577 u8 rev = lm87_read_value(new_client, LM87_REG_REVISION);
578
579 if (rev < 0x01 || rev > 0x08
580 || (lm87_read_value(new_client, LM87_REG_CONFIG) & 0x80)
581 || lm87_read_value(new_client, LM87_REG_COMPANY_ID) != 0x02) {
582 dev_dbg(&adapter->dev,
583 "LM87 detection failed at 0x%02x.\n",
584 address);
585 goto exit_free;
586 }
587 }
588
589 /* We can fill in the remaining client fields */
590 strlcpy(new_client->name, "lm87", I2C_NAME_SIZE);
591 data->valid = 0;
592 init_MUTEX(&data->update_lock);
593
594 /* Tell the I2C layer a new client has arrived */
595 if ((err = i2c_attach_client(new_client)))
596 goto exit_free;
597
598 /* Initialize the LM87 chip */
599 lm87_init_client(new_client);
600
601 data->in_scale[0] = 2500;
602 data->in_scale[1] = 2700;
603 data->in_scale[2] = (data->channel & CHAN_VCC_5V) ? 5000 : 3300;
604 data->in_scale[3] = 5000;
605 data->in_scale[4] = 12000;
606 data->in_scale[5] = 2700;
607 data->in_scale[6] = 1875;
608 data->in_scale[7] = 1875;
609
610 /* Register sysfs hooks */
611 device_create_file(&new_client->dev, &dev_attr_in1_input);
612 device_create_file(&new_client->dev, &dev_attr_in1_min);
613 device_create_file(&new_client->dev, &dev_attr_in1_max);
614 device_create_file(&new_client->dev, &dev_attr_in2_input);
615 device_create_file(&new_client->dev, &dev_attr_in2_min);
616 device_create_file(&new_client->dev, &dev_attr_in2_max);
617 device_create_file(&new_client->dev, &dev_attr_in3_input);
618 device_create_file(&new_client->dev, &dev_attr_in3_min);
619 device_create_file(&new_client->dev, &dev_attr_in3_max);
620 device_create_file(&new_client->dev, &dev_attr_in4_input);
621 device_create_file(&new_client->dev, &dev_attr_in4_min);
622 device_create_file(&new_client->dev, &dev_attr_in4_max);
623
624 if (data->channel & CHAN_NO_FAN(0)) {
625 device_create_file(&new_client->dev, &dev_attr_in6_input);
626 device_create_file(&new_client->dev, &dev_attr_in6_min);
627 device_create_file(&new_client->dev, &dev_attr_in6_max);
628 } else {
629 device_create_file(&new_client->dev, &dev_attr_fan1_input);
630 device_create_file(&new_client->dev, &dev_attr_fan1_min);
631 device_create_file(&new_client->dev, &dev_attr_fan1_div);
632 }
633 if (data->channel & CHAN_NO_FAN(1)) {
634 device_create_file(&new_client->dev, &dev_attr_in7_input);
635 device_create_file(&new_client->dev, &dev_attr_in7_min);
636 device_create_file(&new_client->dev, &dev_attr_in7_max);
637 } else {
638 device_create_file(&new_client->dev, &dev_attr_fan2_input);
639 device_create_file(&new_client->dev, &dev_attr_fan2_min);
640 device_create_file(&new_client->dev, &dev_attr_fan2_div);
641 }
642
643 device_create_file(&new_client->dev, &dev_attr_temp1_input);
644 device_create_file(&new_client->dev, &dev_attr_temp1_max);
645 device_create_file(&new_client->dev, &dev_attr_temp1_min);
646 device_create_file(&new_client->dev, &dev_attr_temp1_crit);
647 device_create_file(&new_client->dev, &dev_attr_temp2_input);
648 device_create_file(&new_client->dev, &dev_attr_temp2_max);
649 device_create_file(&new_client->dev, &dev_attr_temp2_min);
650 device_create_file(&new_client->dev, &dev_attr_temp2_crit);
651
652 if (data->channel & CHAN_TEMP3) {
653 device_create_file(&new_client->dev, &dev_attr_temp3_input);
654 device_create_file(&new_client->dev, &dev_attr_temp3_max);
655 device_create_file(&new_client->dev, &dev_attr_temp3_min);
656 device_create_file(&new_client->dev, &dev_attr_temp3_crit);
657 } else {
658 device_create_file(&new_client->dev, &dev_attr_in0_input);
659 device_create_file(&new_client->dev, &dev_attr_in0_min);
660 device_create_file(&new_client->dev, &dev_attr_in0_max);
661 device_create_file(&new_client->dev, &dev_attr_in5_input);
662 device_create_file(&new_client->dev, &dev_attr_in5_min);
663 device_create_file(&new_client->dev, &dev_attr_in5_max);
664 }
665
666 if (!(data->channel & CHAN_NO_VID)) {
667 device_create_file(&new_client->dev, &dev_attr_cpu0_vid);
668 device_create_file(&new_client->dev, &dev_attr_vrm);
669 }
670
671 device_create_file(&new_client->dev, &dev_attr_alarms);
672 device_create_file(&new_client->dev, &dev_attr_aout_output);
673
674 return 0;
675
676exit_free:
677 kfree(data);
678exit:
679 return err;
680}
681
682static void lm87_init_client(struct i2c_client *client)
683{
684 struct lm87_data *data = i2c_get_clientdata(client);
685 u8 config;
686
687 data->channel = lm87_read_value(client, LM87_REG_CHANNEL_MODE);
688 data->vrm = i2c_which_vrm();
689
690 config = lm87_read_value(client, LM87_REG_CONFIG);
691 if (!(config & 0x01)) {
692 int i;
693
694 /* Limits are left uninitialized after power-up */
695 for (i = 1; i < 6; i++) {
696 lm87_write_value(client, LM87_REG_IN_MIN(i), 0x00);
697 lm87_write_value(client, LM87_REG_IN_MAX(i), 0xFF);
698 }
699 for (i = 0; i < 2; i++) {
700 lm87_write_value(client, LM87_REG_TEMP_HIGH[i], 0x7F);
701 lm87_write_value(client, LM87_REG_TEMP_LOW[i], 0x00);
702 lm87_write_value(client, LM87_REG_AIN_MIN(i), 0x00);
703 lm87_write_value(client, LM87_REG_AIN_MAX(i), 0xFF);
704 }
705 if (data->channel & CHAN_TEMP3) {
706 lm87_write_value(client, LM87_REG_TEMP_HIGH[2], 0x7F);
707 lm87_write_value(client, LM87_REG_TEMP_LOW[2], 0x00);
708 } else {
709 lm87_write_value(client, LM87_REG_IN_MIN(0), 0x00);
710 lm87_write_value(client, LM87_REG_IN_MAX(0), 0xFF);
711 }
712 }
713 if ((config & 0x81) != 0x01) {
714 /* Start monitoring */
715 lm87_write_value(client, LM87_REG_CONFIG,
716 (config & 0xF7) | 0x01);
717 }
718}
719
720static int lm87_detach_client(struct i2c_client *client)
721{
722 int err;
723
724 if ((err = i2c_detach_client(client))) {
725 dev_err(&client->dev, "Client deregistration failed, "
726 "client not detached.\n");
727 return err;
728 }
729
730 kfree(i2c_get_clientdata(client));
731 return 0;
732}
733
734static struct lm87_data *lm87_update_device(struct device *dev)
735{
736 struct i2c_client *client = to_i2c_client(dev);
737 struct lm87_data *data = i2c_get_clientdata(client);
738
739 down(&data->update_lock);
740
741 if (time_after(jiffies, data->last_updated + HZ) || !data->valid) {
742 int i, j;
743
744 dev_dbg(&client->dev, "Updating data.\n");
745
746 i = (data->channel & CHAN_TEMP3) ? 1 : 0;
747 j = (data->channel & CHAN_TEMP3) ? 5 : 6;
748 for (; i < j; i++) {
749 data->in[i] = lm87_read_value(client,
750 LM87_REG_IN(i));
751 data->in_min[i] = lm87_read_value(client,
752 LM87_REG_IN_MIN(i));
753 data->in_max[i] = lm87_read_value(client,
754 LM87_REG_IN_MAX(i));
755 }
756
757 for (i = 0; i < 2; i++) {
758 if (data->channel & CHAN_NO_FAN(i)) {
759 data->in[6+i] = lm87_read_value(client,
760 LM87_REG_AIN(i));
761 data->in_max[6+i] = lm87_read_value(client,
762 LM87_REG_AIN_MAX(i));
763 data->in_min[6+i] = lm87_read_value(client,
764 LM87_REG_AIN_MIN(i));
765
766 } else {
767 data->fan[i] = lm87_read_value(client,
768 LM87_REG_FAN(i));
769 data->fan_min[i] = lm87_read_value(client,
770 LM87_REG_FAN_MIN(i));
771 }
772 }
773
774 j = (data->channel & CHAN_TEMP3) ? 3 : 2;
775 for (i = 0 ; i < j; i++) {
776 data->temp[i] = lm87_read_value(client,
777 LM87_REG_TEMP[i]);
778 data->temp_high[i] = lm87_read_value(client,
779 LM87_REG_TEMP_HIGH[i]);
780 data->temp_low[i] = lm87_read_value(client,
781 LM87_REG_TEMP_LOW[i]);
782 }
783
784 i = lm87_read_value(client, LM87_REG_TEMP_HW_INT_LOCK);
785 j = lm87_read_value(client, LM87_REG_TEMP_HW_INT);
786 data->temp_crit_int = min(i, j);
787
788 i = lm87_read_value(client, LM87_REG_TEMP_HW_EXT_LOCK);
789 j = lm87_read_value(client, LM87_REG_TEMP_HW_EXT);
790 data->temp_crit_ext = min(i, j);
791
792 i = lm87_read_value(client, LM87_REG_VID_FAN_DIV);
793 data->fan_div[0] = (i >> 4) & 0x03;
794 data->fan_div[1] = (i >> 6) & 0x03;
795 data->vid = (i & 0x0F)
796 | (lm87_read_value(client, LM87_REG_VID4) & 0x01)
797 << 4;
798
799 data->alarms = lm87_read_value(client, LM87_REG_ALARMS1)
800 | (lm87_read_value(client, LM87_REG_ALARMS2)
801 << 8);
802 data->aout = lm87_read_value(client, LM87_REG_AOUT);
803
804 data->last_updated = jiffies;
805 data->valid = 1;
806 }
807
808 up(&data->update_lock);
809
810 return data;
811}
812
813static int __init sensors_lm87_init(void)
814{
815 return i2c_add_driver(&lm87_driver);
816}
817
818static void __exit sensors_lm87_exit(void)
819{
820 i2c_del_driver(&lm87_driver);
821}
822
823MODULE_AUTHOR("Jean Delvare <khali@linux-fr.org> and others");
824MODULE_DESCRIPTION("LM87 driver");
825MODULE_LICENSE("GPL");
826
827module_init(sensors_lm87_init);
828module_exit(sensors_lm87_exit);
generated by cgit v1.2.2 (git 2.25.0) at 2024-11-12 06:15:02 -0500