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[PATCH] hwmon: Static function fixes, 2 of 4
[mirror_ubuntu-zesty-kernel.git] / drivers / hwmon / it87.c
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1da177e4
LT		 1/*
2 it87.c - Part of lm_sensors, Linux kernel modules for hardware
3 monitoring.
4
91749996 5 Supports: IT8705F Super I/O chip w/LPC interface
1da177e4
LT		 6 IT8712F Super I/O chip w/LPC interface & SMBus
7 Sis950 A clone of the IT8705F
8
9 Copyright (C) 2001 Chris Gauthron <chrisg@0-in.com>
10 Largely inspired by lm78.c of the same package
11
12 This program is free software; you can redistribute it and/or modify
13 it under the terms of the GNU General Public License as published by
14 the Free Software Foundation; either version 2 of the License, or
15 (at your option) any later version.
16
17 This program is distributed in the hope that it will be useful,
18 but WITHOUT ANY WARRANTY; without even the implied warranty of
19 MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
20 GNU General Public License for more details.
21
22 You should have received a copy of the GNU General Public License
23 along with this program; if not, write to the Free Software
24 Foundation, Inc., 675 Mass Ave, Cambridge, MA 02139, USA.
25*/
26
27/*
28 djg@pdp8.net David Gesswein 7/18/01
29 Modified to fix bug with not all alarms enabled.
30 Added ability to read battery voltage and select temperature sensor
31 type at module load time.
32*/
33
1da177e4
LT		 34#include <linux/module.h>
35#include <linux/init.h>
36#include <linux/slab.h>
37#include <linux/jiffies.h>
38#include <linux/i2c.h>
fde09509 39#include <linux/i2c-isa.h>
943b0830 40#include <linux/hwmon.h>
303760b4
JD		 41#include <linux/hwmon-sysfs.h>
42#include <linux/hwmon-vid.h>
943b0830 43#include <linux/err.h>
1da177e4
LT		 44#include <asm/io.h>
45
46
47/* Addresses to scan */
48static unsigned short normal_i2c[] = { 0x28, 0x29, 0x2a, 0x2b, 0x2c, 0x2d,
49 0x2e, 0x2f, I2C_CLIENT_END };
91749996 50static unsigned short isa_address;
1da177e4
LT		 51
52/* Insmod parameters */
f4b50261 53I2C_CLIENT_INSMOD_2(it87, it8712);
1da177e4
LT		 54
55#define REG 0x2e /* The register to read/write */
56#define DEV 0x07 /* Register: Logical device select */
57#define VAL 0x2f /* The value to read/write */
58#define PME 0x04 /* The device with the fan registers in it */
59#define DEVID 0x20 /* Register: Device ID */
60#define DEVREV 0x22 /* Register: Device Revision */
61
62static inline int
63superio_inb(int reg)
64{
65 outb(reg, REG);
66 return inb(VAL);
67}
68
69static int superio_inw(int reg)
70{
71 int val;
72 outb(reg++, REG);
73 val = inb(VAL) << 8;
74 outb(reg, REG);
75 val |= inb(VAL);
76 return val;
77}
78
79static inline void
80superio_select(void)
81{
82 outb(DEV, REG);
83 outb(PME, VAL);
84}
85
86static inline void
87superio_enter(void)
88{
89 outb(0x87, REG);
90 outb(0x01, REG);
91 outb(0x55, REG);
92 outb(0x55, REG);
93}
94
95static inline void
96superio_exit(void)
97{
98 outb(0x02, REG);
99 outb(0x02, VAL);
100}
101
102#define IT8712F_DEVID 0x8712
103#define IT8705F_DEVID 0x8705
104#define IT87_ACT_REG 0x30
105#define IT87_BASE_REG 0x60
106
107/* Update battery voltage after every reading if true */
108static int update_vbat;
109
110/* Not all BIOSes properly configure the PWM registers */
111static int fix_pwm_polarity;
112
113/* Chip Type */
114
115static u16 chip_type;
116
117/* Many IT87 constants specified below */
118
119/* Length of ISA address segment */
120#define IT87_EXTENT 8
121
122/* Where are the ISA address/data registers relative to the base address */
123#define IT87_ADDR_REG_OFFSET 5
124#define IT87_DATA_REG_OFFSET 6
125
126/*----- The IT87 registers -----*/
127
128#define IT87_REG_CONFIG 0x00
129
130#define IT87_REG_ALARM1 0x01
131#define IT87_REG_ALARM2 0x02
132#define IT87_REG_ALARM3 0x03
133
134#define IT87_REG_VID 0x0a
135#define IT87_REG_FAN_DIV 0x0b
136
137/* Monitors: 9 voltage (0 to 7, battery), 3 temp (1 to 3), 3 fan (1 to 3) */
138
139#define IT87_REG_FAN(nr) (0x0d + (nr))
140#define IT87_REG_FAN_MIN(nr) (0x10 + (nr))
141#define IT87_REG_FAN_MAIN_CTRL 0x13
142#define IT87_REG_FAN_CTL 0x14
143#define IT87_REG_PWM(nr) (0x15 + (nr))
144
145#define IT87_REG_VIN(nr) (0x20 + (nr))
146#define IT87_REG_TEMP(nr) (0x29 + (nr))
147
148#define IT87_REG_VIN_MAX(nr) (0x30 + (nr) * 2)
149#define IT87_REG_VIN_MIN(nr) (0x31 + (nr) * 2)
150#define IT87_REG_TEMP_HIGH(nr) (0x40 + (nr) * 2)
151#define IT87_REG_TEMP_LOW(nr) (0x41 + (nr) * 2)
152
153#define IT87_REG_I2C_ADDR 0x48
154
155#define IT87_REG_VIN_ENABLE 0x50
156#define IT87_REG_TEMP_ENABLE 0x51
157
158#define IT87_REG_CHIPID 0x58
159
160#define IN_TO_REG(val) (SENSORS_LIMIT((((val) + 8)/16),0,255))
161#define IN_FROM_REG(val) ((val) * 16)
162
163static inline u8 FAN_TO_REG(long rpm, int div)
164{
165 if (rpm == 0)
166 return 255;
167 rpm = SENSORS_LIMIT(rpm, 1, 1000000);
168 return SENSORS_LIMIT((1350000 + rpm * div / 2) / (rpm * div), 1,
169 254);
170}
171
172#define FAN_FROM_REG(val,div) ((val)==0?-1:(val)==255?0:1350000/((val)*(div)))
173
174#define TEMP_TO_REG(val) (SENSORS_LIMIT(((val)<0?(((val)-500)/1000):\
175 ((val)+500)/1000),-128,127))
176#define TEMP_FROM_REG(val) (((val)>0x80?(val)-0x100:(val))*1000)
177
1da177e4
LT		 178#define PWM_TO_REG(val) ((val) >> 1)
179#define PWM_FROM_REG(val) (((val)&0x7f) << 1)
180
181static int DIV_TO_REG(int val)
182{
183 int answer = 0;
184 while ((val >>= 1) != 0)
185 answer++;
186 return answer;
187}
188#define DIV_FROM_REG(val) (1 << (val))
189
190
191/* For each registered IT87, we need to keep some data in memory. That
192 data is pointed to by it87_list[NR]->data. The structure itself is
193 dynamically allocated, at the same time when a new it87 client is
194 allocated. */
195struct it87_data {
196 struct i2c_client client;
943b0830 197 struct class_device *class_dev;
1da177e4
LT		 198 struct semaphore lock;
199 enum chips type;
200
201 struct semaphore update_lock;
202 char valid; /* !=0 if following fields are valid */
203 unsigned long last_updated; /* In jiffies */
204
205 u8 in[9]; /* Register value */
206 u8 in_max[9]; /* Register value */
207 u8 in_min[9]; /* Register value */
208 u8 fan[3]; /* Register value */
209 u8 fan_min[3]; /* Register value */
210 u8 temp[3]; /* Register value */
211 u8 temp_high[3]; /* Register value */
212 u8 temp_low[3]; /* Register value */
213 u8 sensor; /* Register value */
214 u8 fan_div[3]; /* Register encoding, shifted right */
215 u8 vid; /* Register encoding, combined */
216 int vrm;
217 u32 alarms; /* Register encoding, combined */
218 u8 fan_main_ctrl; /* Register value */
219 u8 manual_pwm_ctl[3]; /* manual PWM value set by user */
220};
221
222
223static int it87_attach_adapter(struct i2c_adapter *adapter);
2d8672c5 224static int it87_isa_attach_adapter(struct i2c_adapter *adapter);
1da177e4
LT		 225static int it87_detect(struct i2c_adapter *adapter, int address, int kind);
226static int it87_detach_client(struct i2c_client *client);
227
228static int it87_read_value(struct i2c_client *client, u8 register);
229static int it87_write_value(struct i2c_client *client, u8 register,
230 u8 value);
231static struct it87_data *it87_update_device(struct device *dev);
232static int it87_check_pwm(struct i2c_client *client);
233static void it87_init_client(struct i2c_client *client, struct it87_data *data);
234
235
236static struct i2c_driver it87_driver = {
237 .owner = THIS_MODULE,
238 .name = "it87",
239 .id = I2C_DRIVERID_IT87,
240 .flags = I2C_DF_NOTIFY,
241 .attach_adapter = it87_attach_adapter,
242 .detach_client = it87_detach_client,
243};
244
fde09509
JD		 245static struct i2c_driver it87_isa_driver = {
246 .owner = THIS_MODULE,
247 .name = "it87-isa",
2d8672c5 248 .attach_adapter = it87_isa_attach_adapter,
fde09509
JD		 249 .detach_client = it87_detach_client,
250};
251
252
20ad93d4
JD		 253static ssize_t show_in(struct device *dev, struct device_attribute *attr,
254 char *buf)
1da177e4 255{
20ad93d4
JD		 256 struct sensor_device_attribute *sensor_attr = to_sensor_dev_attr(attr);
257 int nr = sensor_attr->index;
258
1da177e4
LT		 259 struct it87_data *data = it87_update_device(dev);
260 return sprintf(buf, "%d\n", IN_FROM_REG(data->in[nr]));
261}
262
20ad93d4
JD		 263static ssize_t show_in_min(struct device *dev, struct device_attribute *attr,
264 char *buf)
1da177e4 265{
20ad93d4
JD		 266 struct sensor_device_attribute *sensor_attr = to_sensor_dev_attr(attr);
267 int nr = sensor_attr->index;
268
1da177e4
LT		 269 struct it87_data *data = it87_update_device(dev);
270 return sprintf(buf, "%d\n", IN_FROM_REG(data->in_min[nr]));
271}
272
20ad93d4
JD		 273static ssize_t show_in_max(struct device *dev, struct device_attribute *attr,
274 char *buf)
1da177e4 275{
20ad93d4
JD		 276 struct sensor_device_attribute *sensor_attr = to_sensor_dev_attr(attr);
277 int nr = sensor_attr->index;
278
1da177e4
LT		 279 struct it87_data *data = it87_update_device(dev);
280 return sprintf(buf, "%d\n", IN_FROM_REG(data->in_max[nr]));
281}
282
20ad93d4
JD		 283static ssize_t set_in_min(struct device *dev, struct device_attribute *attr,
284 const char *buf, size_t count)
1da177e4 285{
20ad93d4
JD		 286 struct sensor_device_attribute *sensor_attr = to_sensor_dev_attr(attr);
287 int nr = sensor_attr->index;
288
1da177e4
LT		 289 struct i2c_client *client = to_i2c_client(dev);
290 struct it87_data *data = i2c_get_clientdata(client);
291 unsigned long val = simple_strtoul(buf, NULL, 10);
292
293 down(&data->update_lock);
294 data->in_min[nr] = IN_TO_REG(val);
295 it87_write_value(client, IT87_REG_VIN_MIN(nr),
296 data->in_min[nr]);
297 up(&data->update_lock);
298 return count;
299}
20ad93d4
JD		 300static ssize_t set_in_max(struct device *dev, struct device_attribute *attr,
301 const char *buf, size_t count)
1da177e4 302{
20ad93d4
JD		 303 struct sensor_device_attribute *sensor_attr = to_sensor_dev_attr(attr);
304 int nr = sensor_attr->index;
305
1da177e4
LT		 306 struct i2c_client *client = to_i2c_client(dev);
307 struct it87_data *data = i2c_get_clientdata(client);
308 unsigned long val = simple_strtoul(buf, NULL, 10);
309
310 down(&data->update_lock);
311 data->in_max[nr] = IN_TO_REG(val);
312 it87_write_value(client, IT87_REG_VIN_MAX(nr),
313 data->in_max[nr]);
314 up(&data->update_lock);
315 return count;
316}
317
318#define show_in_offset(offset) \
20ad93d4
JD		 319static SENSOR_DEVICE_ATTR(in##offset##_input, S_IRUGO, \
320 show_in, NULL, offset);
1da177e4
LT		 321
322#define limit_in_offset(offset) \
20ad93d4
JD		 323static SENSOR_DEVICE_ATTR(in##offset##_min, S_IRUGO | S_IWUSR, \
324 show_in_min, set_in_min, offset); \
325static SENSOR_DEVICE_ATTR(in##offset##_max, S_IRUGO | S_IWUSR, \
326 show_in_max, set_in_max, offset);
1da177e4
LT		 327
328show_in_offset(0);
329limit_in_offset(0);
330show_in_offset(1);
331limit_in_offset(1);
332show_in_offset(2);
333limit_in_offset(2);
334show_in_offset(3);
335limit_in_offset(3);
336show_in_offset(4);
337limit_in_offset(4);
338show_in_offset(5);
339limit_in_offset(5);
340show_in_offset(6);
341limit_in_offset(6);
342show_in_offset(7);
343limit_in_offset(7);
344show_in_offset(8);
345
346/* 3 temperatures */
20ad93d4
JD		 347static ssize_t show_temp(struct device *dev, struct device_attribute *attr,
348 char *buf)
1da177e4 349{
20ad93d4
JD		 350 struct sensor_device_attribute *sensor_attr = to_sensor_dev_attr(attr);
351 int nr = sensor_attr->index;
352
1da177e4
LT		 353 struct it87_data *data = it87_update_device(dev);
354 return sprintf(buf, "%d\n", TEMP_FROM_REG(data->temp[nr]));
355}
20ad93d4
JD		 356static ssize_t show_temp_max(struct device *dev, struct device_attribute *attr,
357 char *buf)
1da177e4 358{
20ad93d4
JD		 359 struct sensor_device_attribute *sensor_attr = to_sensor_dev_attr(attr);
360 int nr = sensor_attr->index;
361
1da177e4
LT		 362 struct it87_data *data = it87_update_device(dev);
363 return sprintf(buf, "%d\n", TEMP_FROM_REG(data->temp_high[nr]));
364}
20ad93d4
JD		 365static ssize_t show_temp_min(struct device *dev, struct device_attribute *attr,
366 char *buf)
1da177e4 367{
20ad93d4
JD		 368 struct sensor_device_attribute *sensor_attr = to_sensor_dev_attr(attr);
369 int nr = sensor_attr->index;
370
1da177e4
LT		 371 struct it87_data *data = it87_update_device(dev);
372 return sprintf(buf, "%d\n", TEMP_FROM_REG(data->temp_low[nr]));
373}
20ad93d4
JD		 374static ssize_t set_temp_max(struct device *dev, struct device_attribute *attr,
375 const char *buf, size_t count)
1da177e4 376{
20ad93d4
JD		 377 struct sensor_device_attribute *sensor_attr = to_sensor_dev_attr(attr);
378 int nr = sensor_attr->index;
379
1da177e4
LT		 380 struct i2c_client *client = to_i2c_client(dev);
381 struct it87_data *data = i2c_get_clientdata(client);
382 int val = simple_strtol(buf, NULL, 10);
383
384 down(&data->update_lock);
385 data->temp_high[nr] = TEMP_TO_REG(val);
386 it87_write_value(client, IT87_REG_TEMP_HIGH(nr), data->temp_high[nr]);
387 up(&data->update_lock);
388 return count;
389}
20ad93d4
JD		 390static ssize_t set_temp_min(struct device *dev, struct device_attribute *attr,
391 const char *buf, size_t count)
1da177e4 392{
20ad93d4
JD		 393 struct sensor_device_attribute *sensor_attr = to_sensor_dev_attr(attr);
394 int nr = sensor_attr->index;
395
1da177e4
LT		 396 struct i2c_client *client = to_i2c_client(dev);
397 struct it87_data *data = i2c_get_clientdata(client);
398 int val = simple_strtol(buf, NULL, 10);
399
400 down(&data->update_lock);
401 data->temp_low[nr] = TEMP_TO_REG(val);
402 it87_write_value(client, IT87_REG_TEMP_LOW(nr), data->temp_low[nr]);
403 up(&data->update_lock);
404 return count;
405}
406#define show_temp_offset(offset) \
20ad93d4
JD		 407static SENSOR_DEVICE_ATTR(temp##offset##_input, S_IRUGO, \
408 show_temp, NULL, offset - 1); \
409static SENSOR_DEVICE_ATTR(temp##offset##_max, S_IRUGO | S_IWUSR, \
410 show_temp_max, set_temp_max, offset - 1); \
411static SENSOR_DEVICE_ATTR(temp##offset##_min, S_IRUGO | S_IWUSR, \
412 show_temp_min, set_temp_min, offset - 1);
1da177e4
LT		 413
414show_temp_offset(1);
415show_temp_offset(2);
416show_temp_offset(3);
417
20ad93d4
JD		 418static ssize_t show_sensor(struct device *dev, struct device_attribute *attr,
419 char *buf)
1da177e4 420{
20ad93d4
JD		 421 struct sensor_device_attribute *sensor_attr = to_sensor_dev_attr(attr);
422 int nr = sensor_attr->index;
423
1da177e4
LT		 424 struct it87_data *data = it87_update_device(dev);
425 u8 reg = data->sensor; /* In case the value is updated while we use it */
426
427 if (reg & (1 << nr))
428 return sprintf(buf, "3\n"); /* thermal diode */
429 if (reg & (8 << nr))
430 return sprintf(buf, "2\n"); /* thermistor */
431 return sprintf(buf, "0\n"); /* disabled */
432}
20ad93d4
JD		 433static ssize_t set_sensor(struct device *dev, struct device_attribute *attr,
434 const char *buf, size_t count)
1da177e4 435{
20ad93d4
JD		 436 struct sensor_device_attribute *sensor_attr = to_sensor_dev_attr(attr);
437 int nr = sensor_attr->index;
438
1da177e4
LT		 439 struct i2c_client *client = to_i2c_client(dev);
440 struct it87_data *data = i2c_get_clientdata(client);
441 int val = simple_strtol(buf, NULL, 10);
442
443 down(&data->update_lock);
444
445 data->sensor &= ~(1 << nr);
446 data->sensor &= ~(8 << nr);
447 /* 3 = thermal diode; 2 = thermistor; 0 = disabled */
448 if (val == 3)
449 data->sensor |= 1 << nr;
450 else if (val == 2)
451 data->sensor |= 8 << nr;
452 else if (val != 0) {
453 up(&data->update_lock);
454 return -EINVAL;
455 }
456 it87_write_value(client, IT87_REG_TEMP_ENABLE, data->sensor);
457 up(&data->update_lock);
458 return count;
459}
460#define show_sensor_offset(offset) \
20ad93d4
JD		 461static SENSOR_DEVICE_ATTR(temp##offset##_type, S_IRUGO | S_IWUSR, \
462 show_sensor, set_sensor, offset - 1);
1da177e4
LT		 463
464show_sensor_offset(1);
465show_sensor_offset(2);
466show_sensor_offset(3);
467
468/* 3 Fans */
20ad93d4
JD		 469static ssize_t show_fan(struct device *dev, struct device_attribute *attr,
470 char *buf)
1da177e4 471{
20ad93d4
JD		 472 struct sensor_device_attribute *sensor_attr = to_sensor_dev_attr(attr);
473 int nr = sensor_attr->index;
474
1da177e4
LT		 475 struct it87_data *data = it87_update_device(dev);
476 return sprintf(buf,"%d\n", FAN_FROM_REG(data->fan[nr],
477 DIV_FROM_REG(data->fan_div[nr])));
478}
20ad93d4
JD		 479static ssize_t show_fan_min(struct device *dev, struct device_attribute *attr,
480 char *buf)
1da177e4 481{
20ad93d4
JD		 482 struct sensor_device_attribute *sensor_attr = to_sensor_dev_attr(attr);
483 int nr = sensor_attr->index;
484
1da177e4
LT		 485 struct it87_data *data = it87_update_device(dev);
486 return sprintf(buf,"%d\n",
487 FAN_FROM_REG(data->fan_min[nr], DIV_FROM_REG(data->fan_div[nr])));
488}
20ad93d4
JD		 489static ssize_t show_fan_div(struct device *dev, struct device_attribute *attr,
490 char *buf)
1da177e4 491{
20ad93d4
JD		 492 struct sensor_device_attribute *sensor_attr = to_sensor_dev_attr(attr);
493 int nr = sensor_attr->index;
494
1da177e4
LT		 495 struct it87_data *data = it87_update_device(dev);
496 return sprintf(buf, "%d\n", DIV_FROM_REG(data->fan_div[nr]));
497}
20ad93d4
JD		 498static ssize_t show_pwm_enable(struct device *dev, struct device_attribute *attr,
499 char *buf)
1da177e4 500{
20ad93d4
JD		 501 struct sensor_device_attribute *sensor_attr = to_sensor_dev_attr(attr);
502 int nr = sensor_attr->index;
503
1da177e4
LT		 504 struct it87_data *data = it87_update_device(dev);
505 return sprintf(buf,"%d\n", (data->fan_main_ctrl & (1 << nr)) ? 1 : 0);
506}
20ad93d4
JD		 507static ssize_t show_pwm(struct device *dev, struct device_attribute *attr,
508 char *buf)
1da177e4 509{
20ad93d4
JD		 510 struct sensor_device_attribute *sensor_attr = to_sensor_dev_attr(attr);
511 int nr = sensor_attr->index;
512
1da177e4
LT		 513 struct it87_data *data = it87_update_device(dev);
514 return sprintf(buf,"%d\n", data->manual_pwm_ctl[nr]);
515}
20ad93d4
JD		 516static ssize_t set_fan_min(struct device *dev, struct device_attribute *attr,
517 const char *buf, size_t count)
1da177e4 518{
20ad93d4
JD		 519 struct sensor_device_attribute *sensor_attr = to_sensor_dev_attr(attr);
520 int nr = sensor_attr->index;
521
1da177e4
LT		 522 struct i2c_client *client = to_i2c_client(dev);
523 struct it87_data *data = i2c_get_clientdata(client);
524 int val = simple_strtol(buf, NULL, 10);
525
526 down(&data->update_lock);
527 data->fan_min[nr] = FAN_TO_REG(val, DIV_FROM_REG(data->fan_div[nr]));
528 it87_write_value(client, IT87_REG_FAN_MIN(nr), data->fan_min[nr]);
529 up(&data->update_lock);
530 return count;
531}
20ad93d4
JD		 532static ssize_t set_fan_div(struct device *dev, struct device_attribute *attr,
533 const char *buf, size_t count)
1da177e4 534{
20ad93d4
JD		 535 struct sensor_device_attribute *sensor_attr = to_sensor_dev_attr(attr);
536 int nr = sensor_attr->index;
537
1da177e4
LT		 538 struct i2c_client *client = to_i2c_client(dev);
539 struct it87_data *data = i2c_get_clientdata(client);
540 int val = simple_strtol(buf, NULL, 10);
541 int i, min[3];
542 u8 old;
543
544 down(&data->update_lock);
545 old = it87_read_value(client, IT87_REG_FAN_DIV);
546
547 for (i = 0; i < 3; i++)
548 min[i] = FAN_FROM_REG(data->fan_min[i], DIV_FROM_REG(data->fan_div[i]));
549
550 switch (nr) {
551 case 0:
552 case 1:
553 data->fan_div[nr] = DIV_TO_REG(val);
554 break;
555 case 2:
556 if (val < 8)
557 data->fan_div[nr] = 1;
558 else
559 data->fan_div[nr] = 3;
560 }
561 val = old & 0x80;
562 val |= (data->fan_div[0] & 0x07);
563 val |= (data->fan_div[1] & 0x07) << 3;
564 if (data->fan_div[2] == 3)
565 val |= 0x1 << 6;
566 it87_write_value(client, IT87_REG_FAN_DIV, val);
567
568 for (i = 0; i < 3; i++) {
569 data->fan_min[i]=FAN_TO_REG(min[i], DIV_FROM_REG(data->fan_div[i]));
570 it87_write_value(client, IT87_REG_FAN_MIN(i), data->fan_min[i]);
571 }
572 up(&data->update_lock);
573 return count;
574}
20ad93d4
JD		 575static ssize_t set_pwm_enable(struct device *dev,
576 struct device_attribute *attr, const char *buf, size_t count)
1da177e4 577{
20ad93d4
JD		 578 struct sensor_device_attribute *sensor_attr = to_sensor_dev_attr(attr);
579 int nr = sensor_attr->index;
580
1da177e4
LT		 581 struct i2c_client *client = to_i2c_client(dev);
582 struct it87_data *data = i2c_get_clientdata(client);
583 int val = simple_strtol(buf, NULL, 10);
584
585 down(&data->update_lock);
586
587 if (val == 0) {
588 int tmp;
589 /* make sure the fan is on when in on/off mode */
590 tmp = it87_read_value(client, IT87_REG_FAN_CTL);
591 it87_write_value(client, IT87_REG_FAN_CTL, tmp | (1 << nr));
592 /* set on/off mode */
593 data->fan_main_ctrl &= ~(1 << nr);
594 it87_write_value(client, IT87_REG_FAN_MAIN_CTRL, data->fan_main_ctrl);
595 } else if (val == 1) {
596 /* set SmartGuardian mode */
597 data->fan_main_ctrl |= (1 << nr);
598 it87_write_value(client, IT87_REG_FAN_MAIN_CTRL, data->fan_main_ctrl);
599 /* set saved pwm value, clear FAN_CTLX PWM mode bit */
600 it87_write_value(client, IT87_REG_PWM(nr), PWM_TO_REG(data->manual_pwm_ctl[nr]));
601 } else {
602 up(&data->update_lock);
603 return -EINVAL;
604 }
605
606 up(&data->update_lock);
607 return count;
608}
20ad93d4
JD		 609static ssize_t set_pwm(struct device *dev, struct device_attribute *attr,
610 const char *buf, size_t count)
1da177e4 611{
20ad93d4
JD		 612 struct sensor_device_attribute *sensor_attr = to_sensor_dev_attr(attr);
613 int nr = sensor_attr->index;
614
1da177e4
LT		 615 struct i2c_client *client = to_i2c_client(dev);
616 struct it87_data *data = i2c_get_clientdata(client);
617 int val = simple_strtol(buf, NULL, 10);
618
619 if (val < 0 || val > 255)
620 return -EINVAL;
621
622 down(&data->update_lock);
623 data->manual_pwm_ctl[nr] = val;
624 if (data->fan_main_ctrl & (1 << nr))
625 it87_write_value(client, IT87_REG_PWM(nr), PWM_TO_REG(data->manual_pwm_ctl[nr]));
626 up(&data->update_lock);
627 return count;
628}
629
20ad93d4
JD		 630#define show_fan_offset(offset) \
631static SENSOR_DEVICE_ATTR(fan##offset##_input, S_IRUGO, \
632 show_fan, NULL, offset - 1); \
633static SENSOR_DEVICE_ATTR(fan##offset##_min, S_IRUGO | S_IWUSR, \
634 show_fan_min, set_fan_min, offset - 1); \
635static SENSOR_DEVICE_ATTR(fan##offset##_div, S_IRUGO | S_IWUSR, \
636 show_fan_div, set_fan_div, offset - 1);
1da177e4
LT		 637
638show_fan_offset(1);
639show_fan_offset(2);
640show_fan_offset(3);
641
642#define show_pwm_offset(offset) \
20ad93d4
JD		 643static SENSOR_DEVICE_ATTR(pwm##offset##_enable, S_IRUGO | S_IWUSR, \
644 show_pwm_enable, set_pwm_enable, offset - 1); \
645static SENSOR_DEVICE_ATTR(pwm##offset, S_IRUGO | S_IWUSR, \
646 show_pwm, set_pwm, offset - 1);
1da177e4
LT		 647
648show_pwm_offset(1);
649show_pwm_offset(2);
650show_pwm_offset(3);
651
652/* Alarms */
30f74292 653static ssize_t show_alarms(struct device *dev, struct device_attribute *attr, char *buf)
1da177e4
LT		 654{
655 struct it87_data *data = it87_update_device(dev);
68188ba7 656 return sprintf(buf, "%u\n", data->alarms);
1da177e4 657}
1d66c64c 658static DEVICE_ATTR(alarms, S_IRUGO, show_alarms, NULL);
1da177e4
LT		 659
660static ssize_t
30f74292 661show_vrm_reg(struct device *dev, struct device_attribute *attr, char *buf)
1da177e4
LT		 662{
663 struct it87_data *data = it87_update_device(dev);
664 return sprintf(buf, "%ld\n", (long) data->vrm);
665}
666static ssize_t
30f74292 667store_vrm_reg(struct device *dev, struct device_attribute *attr, const char *buf, size_t count)
1da177e4
LT		 668{
669 struct i2c_client *client = to_i2c_client(dev);
670 struct it87_data *data = i2c_get_clientdata(client);
671 u32 val;
672
673 val = simple_strtoul(buf, NULL, 10);
674 data->vrm = val;
675
676 return count;
677}
678static DEVICE_ATTR(vrm, S_IRUGO | S_IWUSR, show_vrm_reg, store_vrm_reg);
679#define device_create_file_vrm(client) \
680device_create_file(&client->dev, &dev_attr_vrm)
681
682static ssize_t
30f74292 683show_vid_reg(struct device *dev, struct device_attribute *attr, char *buf)
1da177e4
LT		 684{
685 struct it87_data *data = it87_update_device(dev);
686 return sprintf(buf, "%ld\n", (long) vid_from_reg(data->vid, data->vrm));
687}
688static DEVICE_ATTR(cpu0_vid, S_IRUGO, show_vid_reg, NULL);
689#define device_create_file_vid(client) \
690device_create_file(&client->dev, &dev_attr_cpu0_vid)
691
692/* This function is called when:
693 * it87_driver is inserted (when this module is loaded), for each
694 available adapter
695 * when a new adapter is inserted (and it87_driver is still present) */
696static int it87_attach_adapter(struct i2c_adapter *adapter)
697{
698 if (!(adapter->class & I2C_CLASS_HWMON))
699 return 0;
2ed2dc3c 700 return i2c_probe(adapter, &addr_data, it87_detect);
1da177e4
LT		 701}
702
2d8672c5
JD		 703static int it87_isa_attach_adapter(struct i2c_adapter *adapter)
704{
705 return it87_detect(adapter, isa_address, -1);
706}
707
708/* SuperIO detection - will change isa_address if a chip is found */
91749996 709static int __init it87_find(unsigned short *address)
1da177e4
LT		 710{
711 int err = -ENODEV;
712
713 superio_enter();
714 chip_type = superio_inw(DEVID);
715 if (chip_type != IT8712F_DEVID
716 && chip_type != IT8705F_DEVID)
717 goto exit;
718
719 superio_select();
720 if (!(superio_inb(IT87_ACT_REG) & 0x01)) {
721 pr_info("it87: Device not activated, skipping\n");
722 goto exit;
723 }
724
725 *address = superio_inw(IT87_BASE_REG) & ~(IT87_EXTENT - 1);
726 if (*address == 0) {
727 pr_info("it87: Base address not set, skipping\n");
728 goto exit;
729 }
730
731 err = 0;
732 pr_info("it87: Found IT%04xF chip at 0x%x, revision %d\n",
733 chip_type, *address, superio_inb(DEVREV) & 0x0f);
734
735exit:
736 superio_exit();
737 return err;
738}
739
2ed2dc3c 740/* This function is called by i2c_probe */
1da177e4
LT		 741int it87_detect(struct i2c_adapter *adapter, int address, int kind)
742{
743 int i;
744 struct i2c_client *new_client;
745 struct it87_data *data;
746 int err = 0;
747 const char *name = "";
748 int is_isa = i2c_is_isa_adapter(adapter);
749 int enable_pwm_interface;
750
751 if (!is_isa &&
752 !i2c_check_functionality(adapter, I2C_FUNC_SMBUS_BYTE_DATA))
753 goto ERROR0;
754
755 /* Reserve the ISA region */
756 if (is_isa)
fde09509 757 if (!request_region(address, IT87_EXTENT, it87_isa_driver.name))
1da177e4
LT		 758 goto ERROR0;
759
91749996 760 /* For now, we presume we have a valid client. We create the
1da177e4
LT		 761 client structure, even though we cannot fill it completely yet.
762 But it allows us to access it87_{read,write}_value. */
763
ba9c2e8d 764 if (!(data = kzalloc(sizeof(struct it87_data), GFP_KERNEL))) {
1da177e4
LT		 765 err = -ENOMEM;
766 goto ERROR1;
767 }
1da177e4
LT		 768
769 new_client = &data->client;
770 if (is_isa)
771 init_MUTEX(&data->lock);
772 i2c_set_clientdata(new_client, data);
773 new_client->addr = address;
774 new_client->adapter = adapter;
fde09509 775 new_client->driver = is_isa ? &it87_isa_driver : &it87_driver;
1da177e4
LT		 776 new_client->flags = 0;
777
778 /* Now, we do the remaining detection. */
779
780 if (kind < 0) {
781 if ((it87_read_value(new_client, IT87_REG_CONFIG) & 0x80)
782 || (!is_isa
783 && it87_read_value(new_client, IT87_REG_I2C_ADDR) != address)) {
784 err = -ENODEV;
785 goto ERROR2;
786 }
787 }
788
789 /* Determine the chip type. */
790 if (kind <= 0) {
791 i = it87_read_value(new_client, IT87_REG_CHIPID);
792 if (i == 0x90) {
793 kind = it87;
794 if ((is_isa) && (chip_type == IT8712F_DEVID))
795 kind = it8712;
796 }
797 else {
798 if (kind == 0)
799 dev_info(&adapter->dev,
800 "Ignoring 'force' parameter for unknown chip at "
801 "adapter %d, address 0x%02x\n",
802 i2c_adapter_id(adapter), address);
803 err = -ENODEV;
804 goto ERROR2;
805 }
806 }
807
808 if (kind == it87) {
809 name = "it87";
810 } else if (kind == it8712) {
811 name = "it8712";
812 }
813
814 /* Fill in the remaining client fields and put it into the global list */
815 strlcpy(new_client->name, name, I2C_NAME_SIZE);
816 data->type = kind;
817 data->valid = 0;
818 init_MUTEX(&data->update_lock);
819
820 /* Tell the I2C layer a new client has arrived */
821 if ((err = i2c_attach_client(new_client)))
822 goto ERROR2;
823
824 /* Check PWM configuration */
825 enable_pwm_interface = it87_check_pwm(new_client);
826
827 /* Initialize the IT87 chip */
828 it87_init_client(new_client, data);
829
830 /* Register sysfs hooks */
943b0830
MH		 831 data->class_dev = hwmon_device_register(&new_client->dev);
832 if (IS_ERR(data->class_dev)) {
833 err = PTR_ERR(data->class_dev);
834 goto ERROR3;
835 }
836
20ad93d4
JD		 837 device_create_file(&new_client->dev, &sensor_dev_attr_in0_input.dev_attr);
838 device_create_file(&new_client->dev, &sensor_dev_attr_in1_input.dev_attr);
839 device_create_file(&new_client->dev, &sensor_dev_attr_in2_input.dev_attr);
840 device_create_file(&new_client->dev, &sensor_dev_attr_in3_input.dev_attr);
841 device_create_file(&new_client->dev, &sensor_dev_attr_in4_input.dev_attr);
842 device_create_file(&new_client->dev, &sensor_dev_attr_in5_input.dev_attr);
843 device_create_file(&new_client->dev, &sensor_dev_attr_in6_input.dev_attr);
844 device_create_file(&new_client->dev, &sensor_dev_attr_in7_input.dev_attr);
845 device_create_file(&new_client->dev, &sensor_dev_attr_in8_input.dev_attr);
846 device_create_file(&new_client->dev, &sensor_dev_attr_in0_min.dev_attr);
847 device_create_file(&new_client->dev, &sensor_dev_attr_in1_min.dev_attr);
848 device_create_file(&new_client->dev, &sensor_dev_attr_in2_min.dev_attr);
849 device_create_file(&new_client->dev, &sensor_dev_attr_in3_min.dev_attr);
850 device_create_file(&new_client->dev, &sensor_dev_attr_in4_min.dev_attr);
851 device_create_file(&new_client->dev, &sensor_dev_attr_in5_min.dev_attr);
852 device_create_file(&new_client->dev, &sensor_dev_attr_in6_min.dev_attr);
853 device_create_file(&new_client->dev, &sensor_dev_attr_in7_min.dev_attr);
854 device_create_file(&new_client->dev, &sensor_dev_attr_in0_max.dev_attr);
855 device_create_file(&new_client->dev, &sensor_dev_attr_in1_max.dev_attr);
856 device_create_file(&new_client->dev, &sensor_dev_attr_in2_max.dev_attr);
857 device_create_file(&new_client->dev, &sensor_dev_attr_in3_max.dev_attr);
858 device_create_file(&new_client->dev, &sensor_dev_attr_in4_max.dev_attr);
859 device_create_file(&new_client->dev, &sensor_dev_attr_in5_max.dev_attr);
860 device_create_file(&new_client->dev, &sensor_dev_attr_in6_max.dev_attr);
861 device_create_file(&new_client->dev, &sensor_dev_attr_in7_max.dev_attr);
862 device_create_file(&new_client->dev, &sensor_dev_attr_temp1_input.dev_attr);
863 device_create_file(&new_client->dev, &sensor_dev_attr_temp2_input.dev_attr);
864 device_create_file(&new_client->dev, &sensor_dev_attr_temp3_input.dev_attr);
865 device_create_file(&new_client->dev, &sensor_dev_attr_temp1_max.dev_attr);
866 device_create_file(&new_client->dev, &sensor_dev_attr_temp2_max.dev_attr);
867 device_create_file(&new_client->dev, &sensor_dev_attr_temp3_max.dev_attr);
868 device_create_file(&new_client->dev, &sensor_dev_attr_temp1_min.dev_attr);
869 device_create_file(&new_client->dev, &sensor_dev_attr_temp2_min.dev_attr);
870 device_create_file(&new_client->dev, &sensor_dev_attr_temp3_min.dev_attr);
871 device_create_file(&new_client->dev, &sensor_dev_attr_temp1_type.dev_attr);
872 device_create_file(&new_client->dev, &sensor_dev_attr_temp2_type.dev_attr);
873 device_create_file(&new_client->dev, &sensor_dev_attr_temp3_type.dev_attr);
874 device_create_file(&new_client->dev, &sensor_dev_attr_fan1_input.dev_attr);
875 device_create_file(&new_client->dev, &sensor_dev_attr_fan2_input.dev_attr);
876 device_create_file(&new_client->dev, &sensor_dev_attr_fan3_input.dev_attr);
877 device_create_file(&new_client->dev, &sensor_dev_attr_fan1_min.dev_attr);
878 device_create_file(&new_client->dev, &sensor_dev_attr_fan2_min.dev_attr);
879 device_create_file(&new_client->dev, &sensor_dev_attr_fan3_min.dev_attr);
880 device_create_file(&new_client->dev, &sensor_dev_attr_fan1_div.dev_attr);
881 device_create_file(&new_client->dev, &sensor_dev_attr_fan2_div.dev_attr);
882 device_create_file(&new_client->dev, &sensor_dev_attr_fan3_div.dev_attr);
1da177e4
LT		 883 device_create_file(&new_client->dev, &dev_attr_alarms);
884 if (enable_pwm_interface) {
20ad93d4
JD		 885 device_create_file(&new_client->dev, &sensor_dev_attr_pwm1_enable.dev_attr);
886 device_create_file(&new_client->dev, &sensor_dev_attr_pwm2_enable.dev_attr);
887 device_create_file(&new_client->dev, &sensor_dev_attr_pwm3_enable.dev_attr);
888 device_create_file(&new_client->dev, &sensor_dev_attr_pwm1.dev_attr);
889 device_create_file(&new_client->dev, &sensor_dev_attr_pwm2.dev_attr);
890 device_create_file(&new_client->dev, &sensor_dev_attr_pwm3.dev_attr);
1da177e4
LT		 891 }
892
893 if (data->type == it8712) {
303760b4 894 data->vrm = vid_which_vrm();
1da177e4
LT		 895 device_create_file_vrm(new_client);
896 device_create_file_vid(new_client);
897 }
898
899 return 0;
900
943b0830
MH		 901ERROR3:
902 i2c_detach_client(new_client);
1da177e4
LT		 903ERROR2:
904 kfree(data);
905ERROR1:
906 if (is_isa)
907 release_region(address, IT87_EXTENT);
908ERROR0:
909 return err;
910}
911
912static int it87_detach_client(struct i2c_client *client)
913{
943b0830 914 struct it87_data *data = i2c_get_clientdata(client);
1da177e4
LT		 915 int err;
916
943b0830
MH		 917 hwmon_device_unregister(data->class_dev);
918
7bef5594 919 if ((err = i2c_detach_client(client)))
1da177e4 920 return err;
1da177e4
LT		 921
922 if(i2c_is_isa_client(client))
923 release_region(client->addr, IT87_EXTENT);
943b0830 924 kfree(data);
1da177e4
LT		 925
926 return 0;
927}
928
44bbe87e 929/* The SMBus locks itself, but ISA access must be locked explicitly!
1da177e4
LT		 930 We don't want to lock the whole ISA bus, so we lock each client
931 separately.
932 We ignore the IT87 BUSY flag at this moment - it could lead to deadlocks,
933 would slow down the IT87 access and should not be necessary. */
934static int it87_read_value(struct i2c_client *client, u8 reg)
935{
936 struct it87_data *data = i2c_get_clientdata(client);
937
938 int res;
939 if (i2c_is_isa_client(client)) {
940 down(&data->lock);
941 outb_p(reg, client->addr + IT87_ADDR_REG_OFFSET);
942 res = inb_p(client->addr + IT87_DATA_REG_OFFSET);
943 up(&data->lock);
944 return res;
945 } else
946 return i2c_smbus_read_byte_data(client, reg);
947}
948
44bbe87e 949/* The SMBus locks itself, but ISA access muse be locked explicitly!
1da177e4
LT		 950 We don't want to lock the whole ISA bus, so we lock each client
951 separately.
952 We ignore the IT87 BUSY flag at this moment - it could lead to deadlocks,
953 would slow down the IT87 access and should not be necessary. */
954static int it87_write_value(struct i2c_client *client, u8 reg, u8 value)
955{
956 struct it87_data *data = i2c_get_clientdata(client);
957
958 if (i2c_is_isa_client(client)) {
959 down(&data->lock);
960 outb_p(reg, client->addr + IT87_ADDR_REG_OFFSET);
961 outb_p(value, client->addr + IT87_DATA_REG_OFFSET);
962 up(&data->lock);
963 return 0;
964 } else
965 return i2c_smbus_write_byte_data(client, reg, value);
966}
967
968/* Return 1 if and only if the PWM interface is safe to use */
969static int it87_check_pwm(struct i2c_client *client)
970{
971 /* Some BIOSes fail to correctly configure the IT87 fans. All fans off
972 * and polarity set to active low is sign that this is the case so we
973 * disable pwm control to protect the user. */
974 int tmp = it87_read_value(client, IT87_REG_FAN_CTL);
975 if ((tmp & 0x87) == 0) {
976 if (fix_pwm_polarity) {
977 /* The user asks us to attempt a chip reconfiguration.
978 * This means switching to active high polarity and
979 * inverting all fan speed values. */
980 int i;
981 u8 pwm[3];
982
983 for (i = 0; i < 3; i++)
984 pwm[i] = it87_read_value(client,
985 IT87_REG_PWM(i));
986
987 /* If any fan is in automatic pwm mode, the polarity
988 * might be correct, as suspicious as it seems, so we
989 * better don't change anything (but still disable the
990 * PWM interface). */
991 if (!((pwm[0] | pwm[1] | pwm[2]) & 0x80)) {
992 dev_info(&client->dev, "Reconfiguring PWM to "
993 "active high polarity\n");
994 it87_write_value(client, IT87_REG_FAN_CTL,
995 tmp | 0x87);
996 for (i = 0; i < 3; i++)
997 it87_write_value(client,
998 IT87_REG_PWM(i),
999 0x7f & ~pwm[i]);
1000 return 1;
1001 }
1002
1003 dev_info(&client->dev, "PWM configuration is "
1004 "too broken to be fixed\n");
1005 }
1006
1007 dev_info(&client->dev, "Detected broken BIOS "
1008 "defaults, disabling PWM interface\n");
1009 return 0;
1010 } else if (fix_pwm_polarity) {
1011 dev_info(&client->dev, "PWM configuration looks "
1012 "sane, won't touch\n");
1013 }
1014
1015 return 1;
1016}
1017
1018/* Called when we have found a new IT87. */
1019static void it87_init_client(struct i2c_client *client, struct it87_data *data)
1020{
1021 int tmp, i;
1022
1023 /* initialize to sane defaults:
1024 * - if the chip is in manual pwm mode, this will be overwritten with
1025 * the actual settings on the chip (so in this case, initialization
1026 * is not needed)
1027 * - if in automatic or on/off mode, we could switch to manual mode,
1028 * read the registers and set manual_pwm_ctl accordingly, but currently
1029 * this is not implemented, so we initialize to something sane */
1030 for (i = 0; i < 3; i++) {
1031 data->manual_pwm_ctl[i] = 0xff;
1032 }
1033
1034 /* Check if temperature channnels are reset manually or by some reason */
1035 tmp = it87_read_value(client, IT87_REG_TEMP_ENABLE);
1036 if ((tmp & 0x3f) == 0) {
1037 /* Temp1,Temp3=thermistor; Temp2=thermal diode */
1038 tmp = (tmp & 0xc0) | 0x2a;
1039 it87_write_value(client, IT87_REG_TEMP_ENABLE, tmp);
1040 }
1041 data->sensor = tmp;
1042
1043 /* Check if voltage monitors are reset manually or by some reason */
1044 tmp = it87_read_value(client, IT87_REG_VIN_ENABLE);
1045 if ((tmp & 0xff) == 0) {
1046 /* Enable all voltage monitors */
1047 it87_write_value(client, IT87_REG_VIN_ENABLE, 0xff);
1048 }
1049
1050 /* Check if tachometers are reset manually or by some reason */
1051 data->fan_main_ctrl = it87_read_value(client, IT87_REG_FAN_MAIN_CTRL);
1052 if ((data->fan_main_ctrl & 0x70) == 0) {
1053 /* Enable all fan tachometers */
1054 data->fan_main_ctrl |= 0x70;
1055 it87_write_value(client, IT87_REG_FAN_MAIN_CTRL, data->fan_main_ctrl);
1056 }
1057
1058 /* Set current fan mode registers and the default settings for the
1059 * other mode registers */
1060 for (i = 0; i < 3; i++) {
1061 if (data->fan_main_ctrl & (1 << i)) {
1062 /* pwm mode */
1063 tmp = it87_read_value(client, IT87_REG_PWM(i));
1064 if (tmp & 0x80) {
1065 /* automatic pwm - not yet implemented, but
1066 * leave the settings made by the BIOS alone
1067 * until a change is requested via the sysfs
1068 * interface */
1069 } else {
1070 /* manual pwm */
1071 data->manual_pwm_ctl[i] = PWM_FROM_REG(tmp);
1072 }
1073 }
1074 }
1075
1076 /* Start monitoring */
1077 it87_write_value(client, IT87_REG_CONFIG,
1078 (it87_read_value(client, IT87_REG_CONFIG) & 0x36)
1079 | (update_vbat ? 0x41 : 0x01));
1080}
1081
1082static struct it87_data *it87_update_device(struct device *dev)
1083{
1084 struct i2c_client *client = to_i2c_client(dev);
1085 struct it87_data *data = i2c_get_clientdata(client);
1086 int i;
1087
1088 down(&data->update_lock);
1089
1090 if (time_after(jiffies, data->last_updated + HZ + HZ / 2)
1091 || !data->valid) {
1092
1093 if (update_vbat) {
1094 /* Cleared after each update, so reenable. Value
1095 returned by this read will be previous value */
1096 it87_write_value(client, IT87_REG_CONFIG,
1097 it87_read_value(client, IT87_REG_CONFIG) | 0x40);
1098 }
1099 for (i = 0; i <= 7; i++) {
1100 data->in[i] =
1101 it87_read_value(client, IT87_REG_VIN(i));
1102 data->in_min[i] =
1103 it87_read_value(client, IT87_REG_VIN_MIN(i));
1104 data->in_max[i] =
1105 it87_read_value(client, IT87_REG_VIN_MAX(i));
1106 }
1107 data->in[8] =
1108 it87_read_value(client, IT87_REG_VIN(8));
1109 /* Temperature sensor doesn't have limit registers, set
1110 to min and max value */
1111 data->in_min[8] = 0;
1112 data->in_max[8] = 255;
1113
1114 for (i = 0; i < 3; i++) {
1115 data->fan[i] =
1116 it87_read_value(client, IT87_REG_FAN(i));
1117 data->fan_min[i] =
1118 it87_read_value(client, IT87_REG_FAN_MIN(i));
1119 }
1120 for (i = 0; i < 3; i++) {
1121 data->temp[i] =
1122 it87_read_value(client, IT87_REG_TEMP(i));
1123 data->temp_high[i] =
1124 it87_read_value(client, IT87_REG_TEMP_HIGH(i));
1125 data->temp_low[i] =
1126 it87_read_value(client, IT87_REG_TEMP_LOW(i));
1127 }
1128
1129 i = it87_read_value(client, IT87_REG_FAN_DIV);
1130 data->fan_div[0] = i & 0x07;
1131 data->fan_div[1] = (i >> 3) & 0x07;
1132 data->fan_div[2] = (i & 0x40) ? 3 : 1;
1133
1134 data->alarms =
1135 it87_read_value(client, IT87_REG_ALARM1) |
1136 (it87_read_value(client, IT87_REG_ALARM2) << 8) |
1137 (it87_read_value(client, IT87_REG_ALARM3) << 16);
1138 data->fan_main_ctrl = it87_read_value(client, IT87_REG_FAN_MAIN_CTRL);
1139
1140 data->sensor = it87_read_value(client, IT87_REG_TEMP_ENABLE);
1141 /* The 8705 does not have VID capability */
1142 if (data->type == it8712) {
1143 data->vid = it87_read_value(client, IT87_REG_VID);
1144 data->vid &= 0x1f;
1145 }
1146 data->last_updated = jiffies;
1147 data->valid = 1;
1148 }
1149
1150 up(&data->update_lock);
1151
1152 return data;
1153}
1154
1155static int __init sm_it87_init(void)
1156{
91749996 1157 int res;
fde09509
JD		 1158
1159 res = i2c_add_driver(&it87_driver);
1160 if (res)
1161 return res;
1162
91749996
JD		 1163 if (!it87_find(&isa_address)) {
1164 res = i2c_isa_add_driver(&it87_isa_driver);
1165 if (res) {
1166 i2c_del_driver(&it87_driver);
1167 return res;
1168 }
fde09509
JD		 1169 }
1170
1171 return 0;
1da177e4
LT		 1172}
1173
1174static void __exit sm_it87_exit(void)
1175{
fde09509 1176 i2c_isa_del_driver(&it87_isa_driver);
1da177e4
LT		 1177 i2c_del_driver(&it87_driver);
1178}
1179
1180
1181MODULE_AUTHOR("Chris Gauthron <chrisg@0-in.com>");
1182MODULE_DESCRIPTION("IT8705F, IT8712F, Sis950 driver");
1183module_param(update_vbat, bool, 0);
1184MODULE_PARM_DESC(update_vbat, "Update vbat if set else return powerup value");
1185module_param(fix_pwm_polarity, bool, 0);
1186MODULE_PARM_DESC(fix_pwm_polarity, "Force PWM polarity to active high (DANGEROUS)");
1187MODULE_LICENSE("GPL");
1188
1189module_init(sm_it87_init);
1190module_exit(sm_it87_exit);
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