blob: b1719f4097efbdaa6e8fead081353aa59c6aa5f5 [file] [log] [blame]
Linus Torvalds1da177e2005-04-16 15:20:36 -07001/*
2 it87.c - Part of lm_sensors, Linux kernel modules for hardware
3 monitoring.
4
5 Supports: IT8705F Super I/O chip w/LPC interface & SMBus
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
Linus Torvalds1da177e2005-04-16 15:20:36 -070034#include <linux/module.h>
35#include <linux/init.h>
36#include <linux/slab.h>
37#include <linux/jiffies.h>
38#include <linux/i2c.h>
Jean Delvarefde09502005-07-19 23:51:07 +020039#include <linux/i2c-isa.h>
Linus Torvalds1da177e2005-04-16 15:20:36 -070040#include <linux/i2c-sensor.h>
41#include <linux/i2c-vid.h>
Jean Delvare10c08f82005-06-06 19:34:45 +020042#include <linux/hwmon-sysfs.h>
Mark M. Hoffman943b0832005-07-15 21:39:18 -040043#include <linux/hwmon.h>
44#include <linux/err.h>
Linus Torvalds1da177e2005-04-16 15:20:36 -070045#include <asm/io.h>
46
47
48/* Addresses to scan */
49static unsigned short normal_i2c[] = { 0x28, 0x29, 0x2a, 0x2b, 0x2c, 0x2d,
50 0x2e, 0x2f, I2C_CLIENT_END };
Jean Delvare2d8672c2005-07-19 23:56:35 +020051static unsigned short isa_address = 0x290;
Linus Torvalds1da177e2005-04-16 15:20:36 -070052
53/* Insmod parameters */
54SENSORS_INSMOD_2(it87, it8712);
55
56#define REG 0x2e /* The register to read/write */
57#define DEV 0x07 /* Register: Logical device select */
58#define VAL 0x2f /* The value to read/write */
59#define PME 0x04 /* The device with the fan registers in it */
60#define DEVID 0x20 /* Register: Device ID */
61#define DEVREV 0x22 /* Register: Device Revision */
62
63static inline int
64superio_inb(int reg)
65{
66 outb(reg, REG);
67 return inb(VAL);
68}
69
70static int superio_inw(int reg)
71{
72 int val;
73 outb(reg++, REG);
74 val = inb(VAL) << 8;
75 outb(reg, REG);
76 val |= inb(VAL);
77 return val;
78}
79
80static inline void
81superio_select(void)
82{
83 outb(DEV, REG);
84 outb(PME, VAL);
85}
86
87static inline void
88superio_enter(void)
89{
90 outb(0x87, REG);
91 outb(0x01, REG);
92 outb(0x55, REG);
93 outb(0x55, REG);
94}
95
96static inline void
97superio_exit(void)
98{
99 outb(0x02, REG);
100 outb(0x02, VAL);
101}
102
103#define IT8712F_DEVID 0x8712
104#define IT8705F_DEVID 0x8705
105#define IT87_ACT_REG 0x30
106#define IT87_BASE_REG 0x60
107
108/* Update battery voltage after every reading if true */
109static int update_vbat;
110
111/* Not all BIOSes properly configure the PWM registers */
112static int fix_pwm_polarity;
113
114/* Chip Type */
115
116static u16 chip_type;
117
118/* Many IT87 constants specified below */
119
120/* Length of ISA address segment */
121#define IT87_EXTENT 8
122
123/* Where are the ISA address/data registers relative to the base address */
124#define IT87_ADDR_REG_OFFSET 5
125#define IT87_DATA_REG_OFFSET 6
126
127/*----- The IT87 registers -----*/
128
129#define IT87_REG_CONFIG 0x00
130
131#define IT87_REG_ALARM1 0x01
132#define IT87_REG_ALARM2 0x02
133#define IT87_REG_ALARM3 0x03
134
135#define IT87_REG_VID 0x0a
136#define IT87_REG_FAN_DIV 0x0b
137
138/* Monitors: 9 voltage (0 to 7, battery), 3 temp (1 to 3), 3 fan (1 to 3) */
139
140#define IT87_REG_FAN(nr) (0x0d + (nr))
141#define IT87_REG_FAN_MIN(nr) (0x10 + (nr))
142#define IT87_REG_FAN_MAIN_CTRL 0x13
143#define IT87_REG_FAN_CTL 0x14
144#define IT87_REG_PWM(nr) (0x15 + (nr))
145
146#define IT87_REG_VIN(nr) (0x20 + (nr))
147#define IT87_REG_TEMP(nr) (0x29 + (nr))
148
149#define IT87_REG_VIN_MAX(nr) (0x30 + (nr) * 2)
150#define IT87_REG_VIN_MIN(nr) (0x31 + (nr) * 2)
151#define IT87_REG_TEMP_HIGH(nr) (0x40 + (nr) * 2)
152#define IT87_REG_TEMP_LOW(nr) (0x41 + (nr) * 2)
153
154#define IT87_REG_I2C_ADDR 0x48
155
156#define IT87_REG_VIN_ENABLE 0x50
157#define IT87_REG_TEMP_ENABLE 0x51
158
159#define IT87_REG_CHIPID 0x58
160
161#define IN_TO_REG(val) (SENSORS_LIMIT((((val) + 8)/16),0,255))
162#define IN_FROM_REG(val) ((val) * 16)
163
164static inline u8 FAN_TO_REG(long rpm, int div)
165{
166 if (rpm == 0)
167 return 255;
168 rpm = SENSORS_LIMIT(rpm, 1, 1000000);
169 return SENSORS_LIMIT((1350000 + rpm * div / 2) / (rpm * div), 1,
170 254);
171}
172
173#define FAN_FROM_REG(val,div) ((val)==0?-1:(val)==255?0:1350000/((val)*(div)))
174
175#define TEMP_TO_REG(val) (SENSORS_LIMIT(((val)<0?(((val)-500)/1000):\
176 ((val)+500)/1000),-128,127))
177#define TEMP_FROM_REG(val) (((val)>0x80?(val)-0x100:(val))*1000)
178
Linus Torvalds1da177e2005-04-16 15:20:36 -0700179#define PWM_TO_REG(val) ((val) >> 1)
180#define PWM_FROM_REG(val) (((val)&0x7f) << 1)
181
182static int DIV_TO_REG(int val)
183{
184 int answer = 0;
185 while ((val >>= 1) != 0)
186 answer++;
187 return answer;
188}
189#define DIV_FROM_REG(val) (1 << (val))
190
191
192/* For each registered IT87, we need to keep some data in memory. That
193 data is pointed to by it87_list[NR]->data. The structure itself is
194 dynamically allocated, at the same time when a new it87 client is
195 allocated. */
196struct it87_data {
197 struct i2c_client client;
Mark M. Hoffman943b0832005-07-15 21:39:18 -0400198 struct class_device *class_dev;
Linus Torvalds1da177e2005-04-16 15:20:36 -0700199 struct semaphore lock;
200 enum chips type;
201
202 struct semaphore update_lock;
203 char valid; /* !=0 if following fields are valid */
204 unsigned long last_updated; /* In jiffies */
205
206 u8 in[9]; /* Register value */
207 u8 in_max[9]; /* Register value */
208 u8 in_min[9]; /* Register value */
209 u8 fan[3]; /* Register value */
210 u8 fan_min[3]; /* Register value */
211 u8 temp[3]; /* Register value */
212 u8 temp_high[3]; /* Register value */
213 u8 temp_low[3]; /* Register value */
214 u8 sensor; /* Register value */
215 u8 fan_div[3]; /* Register encoding, shifted right */
216 u8 vid; /* Register encoding, combined */
217 int vrm;
218 u32 alarms; /* Register encoding, combined */
219 u8 fan_main_ctrl; /* Register value */
220 u8 manual_pwm_ctl[3]; /* manual PWM value set by user */
221};
222
223
224static int it87_attach_adapter(struct i2c_adapter *adapter);
Jean Delvare2d8672c2005-07-19 23:56:35 +0200225static int it87_isa_attach_adapter(struct i2c_adapter *adapter);
Linus Torvalds1da177e2005-04-16 15:20:36 -0700226static int it87_detect(struct i2c_adapter *adapter, int address, int kind);
227static int it87_detach_client(struct i2c_client *client);
228
229static int it87_read_value(struct i2c_client *client, u8 register);
230static int it87_write_value(struct i2c_client *client, u8 register,
231 u8 value);
232static struct it87_data *it87_update_device(struct device *dev);
233static int it87_check_pwm(struct i2c_client *client);
234static void it87_init_client(struct i2c_client *client, struct it87_data *data);
235
236
237static struct i2c_driver it87_driver = {
238 .owner = THIS_MODULE,
239 .name = "it87",
240 .id = I2C_DRIVERID_IT87,
241 .flags = I2C_DF_NOTIFY,
242 .attach_adapter = it87_attach_adapter,
243 .detach_client = it87_detach_client,
244};
245
Jean Delvarefde09502005-07-19 23:51:07 +0200246static struct i2c_driver it87_isa_driver = {
247 .owner = THIS_MODULE,
248 .name = "it87-isa",
Jean Delvare2d8672c2005-07-19 23:56:35 +0200249 .attach_adapter = it87_isa_attach_adapter,
Jean Delvarefde09502005-07-19 23:51:07 +0200250 .detach_client = it87_detach_client,
251};
252
253
Jean Delvare20ad93d2005-06-05 11:53:25 +0200254static ssize_t show_in(struct device *dev, struct device_attribute *attr,
255 char *buf)
Linus Torvalds1da177e2005-04-16 15:20:36 -0700256{
Jean Delvare20ad93d2005-06-05 11:53:25 +0200257 struct sensor_device_attribute *sensor_attr = to_sensor_dev_attr(attr);
258 int nr = sensor_attr->index;
259
Linus Torvalds1da177e2005-04-16 15:20:36 -0700260 struct it87_data *data = it87_update_device(dev);
261 return sprintf(buf, "%d\n", IN_FROM_REG(data->in[nr]));
262}
263
Jean Delvare20ad93d2005-06-05 11:53:25 +0200264static ssize_t show_in_min(struct device *dev, struct device_attribute *attr,
265 char *buf)
Linus Torvalds1da177e2005-04-16 15:20:36 -0700266{
Jean Delvare20ad93d2005-06-05 11:53:25 +0200267 struct sensor_device_attribute *sensor_attr = to_sensor_dev_attr(attr);
268 int nr = sensor_attr->index;
269
Linus Torvalds1da177e2005-04-16 15:20:36 -0700270 struct it87_data *data = it87_update_device(dev);
271 return sprintf(buf, "%d\n", IN_FROM_REG(data->in_min[nr]));
272}
273
Jean Delvare20ad93d2005-06-05 11:53:25 +0200274static ssize_t show_in_max(struct device *dev, struct device_attribute *attr,
275 char *buf)
Linus Torvalds1da177e2005-04-16 15:20:36 -0700276{
Jean Delvare20ad93d2005-06-05 11:53:25 +0200277 struct sensor_device_attribute *sensor_attr = to_sensor_dev_attr(attr);
278 int nr = sensor_attr->index;
279
Linus Torvalds1da177e2005-04-16 15:20:36 -0700280 struct it87_data *data = it87_update_device(dev);
281 return sprintf(buf, "%d\n", IN_FROM_REG(data->in_max[nr]));
282}
283
Jean Delvare20ad93d2005-06-05 11:53:25 +0200284static ssize_t set_in_min(struct device *dev, struct device_attribute *attr,
285 const char *buf, size_t count)
Linus Torvalds1da177e2005-04-16 15:20:36 -0700286{
Jean Delvare20ad93d2005-06-05 11:53:25 +0200287 struct sensor_device_attribute *sensor_attr = to_sensor_dev_attr(attr);
288 int nr = sensor_attr->index;
289
Linus Torvalds1da177e2005-04-16 15:20:36 -0700290 struct i2c_client *client = to_i2c_client(dev);
291 struct it87_data *data = i2c_get_clientdata(client);
292 unsigned long val = simple_strtoul(buf, NULL, 10);
293
294 down(&data->update_lock);
295 data->in_min[nr] = IN_TO_REG(val);
296 it87_write_value(client, IT87_REG_VIN_MIN(nr),
297 data->in_min[nr]);
298 up(&data->update_lock);
299 return count;
300}
Jean Delvare20ad93d2005-06-05 11:53:25 +0200301static ssize_t set_in_max(struct device *dev, struct device_attribute *attr,
302 const char *buf, size_t count)
Linus Torvalds1da177e2005-04-16 15:20:36 -0700303{
Jean Delvare20ad93d2005-06-05 11:53:25 +0200304 struct sensor_device_attribute *sensor_attr = to_sensor_dev_attr(attr);
305 int nr = sensor_attr->index;
306
Linus Torvalds1da177e2005-04-16 15:20:36 -0700307 struct i2c_client *client = to_i2c_client(dev);
308 struct it87_data *data = i2c_get_clientdata(client);
309 unsigned long val = simple_strtoul(buf, NULL, 10);
310
311 down(&data->update_lock);
312 data->in_max[nr] = IN_TO_REG(val);
313 it87_write_value(client, IT87_REG_VIN_MAX(nr),
314 data->in_max[nr]);
315 up(&data->update_lock);
316 return count;
317}
318
319#define show_in_offset(offset) \
Jean Delvare20ad93d2005-06-05 11:53:25 +0200320static SENSOR_DEVICE_ATTR(in##offset##_input, S_IRUGO, \
321 show_in, NULL, offset);
Linus Torvalds1da177e2005-04-16 15:20:36 -0700322
323#define limit_in_offset(offset) \
Jean Delvare20ad93d2005-06-05 11:53:25 +0200324static SENSOR_DEVICE_ATTR(in##offset##_min, S_IRUGO | S_IWUSR, \
325 show_in_min, set_in_min, offset); \
326static SENSOR_DEVICE_ATTR(in##offset##_max, S_IRUGO | S_IWUSR, \
327 show_in_max, set_in_max, offset);
Linus Torvalds1da177e2005-04-16 15:20:36 -0700328
329show_in_offset(0);
330limit_in_offset(0);
331show_in_offset(1);
332limit_in_offset(1);
333show_in_offset(2);
334limit_in_offset(2);
335show_in_offset(3);
336limit_in_offset(3);
337show_in_offset(4);
338limit_in_offset(4);
339show_in_offset(5);
340limit_in_offset(5);
341show_in_offset(6);
342limit_in_offset(6);
343show_in_offset(7);
344limit_in_offset(7);
345show_in_offset(8);
346
347/* 3 temperatures */
Jean Delvare20ad93d2005-06-05 11:53:25 +0200348static ssize_t show_temp(struct device *dev, struct device_attribute *attr,
349 char *buf)
Linus Torvalds1da177e2005-04-16 15:20:36 -0700350{
Jean Delvare20ad93d2005-06-05 11:53:25 +0200351 struct sensor_device_attribute *sensor_attr = to_sensor_dev_attr(attr);
352 int nr = sensor_attr->index;
353
Linus Torvalds1da177e2005-04-16 15:20:36 -0700354 struct it87_data *data = it87_update_device(dev);
355 return sprintf(buf, "%d\n", TEMP_FROM_REG(data->temp[nr]));
356}
Jean Delvare20ad93d2005-06-05 11:53:25 +0200357static ssize_t show_temp_max(struct device *dev, struct device_attribute *attr,
358 char *buf)
Linus Torvalds1da177e2005-04-16 15:20:36 -0700359{
Jean Delvare20ad93d2005-06-05 11:53:25 +0200360 struct sensor_device_attribute *sensor_attr = to_sensor_dev_attr(attr);
361 int nr = sensor_attr->index;
362
Linus Torvalds1da177e2005-04-16 15:20:36 -0700363 struct it87_data *data = it87_update_device(dev);
364 return sprintf(buf, "%d\n", TEMP_FROM_REG(data->temp_high[nr]));
365}
Jean Delvare20ad93d2005-06-05 11:53:25 +0200366static ssize_t show_temp_min(struct device *dev, struct device_attribute *attr,
367 char *buf)
Linus Torvalds1da177e2005-04-16 15:20:36 -0700368{
Jean Delvare20ad93d2005-06-05 11:53:25 +0200369 struct sensor_device_attribute *sensor_attr = to_sensor_dev_attr(attr);
370 int nr = sensor_attr->index;
371
Linus Torvalds1da177e2005-04-16 15:20:36 -0700372 struct it87_data *data = it87_update_device(dev);
373 return sprintf(buf, "%d\n", TEMP_FROM_REG(data->temp_low[nr]));
374}
Jean Delvare20ad93d2005-06-05 11:53:25 +0200375static ssize_t set_temp_max(struct device *dev, struct device_attribute *attr,
376 const char *buf, size_t count)
Linus Torvalds1da177e2005-04-16 15:20:36 -0700377{
Jean Delvare20ad93d2005-06-05 11:53:25 +0200378 struct sensor_device_attribute *sensor_attr = to_sensor_dev_attr(attr);
379 int nr = sensor_attr->index;
380
Linus Torvalds1da177e2005-04-16 15:20:36 -0700381 struct i2c_client *client = to_i2c_client(dev);
382 struct it87_data *data = i2c_get_clientdata(client);
383 int val = simple_strtol(buf, NULL, 10);
384
385 down(&data->update_lock);
386 data->temp_high[nr] = TEMP_TO_REG(val);
387 it87_write_value(client, IT87_REG_TEMP_HIGH(nr), data->temp_high[nr]);
388 up(&data->update_lock);
389 return count;
390}
Jean Delvare20ad93d2005-06-05 11:53:25 +0200391static ssize_t set_temp_min(struct device *dev, struct device_attribute *attr,
392 const char *buf, size_t count)
Linus Torvalds1da177e2005-04-16 15:20:36 -0700393{
Jean Delvare20ad93d2005-06-05 11:53:25 +0200394 struct sensor_device_attribute *sensor_attr = to_sensor_dev_attr(attr);
395 int nr = sensor_attr->index;
396
Linus Torvalds1da177e2005-04-16 15:20:36 -0700397 struct i2c_client *client = to_i2c_client(dev);
398 struct it87_data *data = i2c_get_clientdata(client);
399 int val = simple_strtol(buf, NULL, 10);
400
401 down(&data->update_lock);
402 data->temp_low[nr] = TEMP_TO_REG(val);
403 it87_write_value(client, IT87_REG_TEMP_LOW(nr), data->temp_low[nr]);
404 up(&data->update_lock);
405 return count;
406}
407#define show_temp_offset(offset) \
Jean Delvare20ad93d2005-06-05 11:53:25 +0200408static SENSOR_DEVICE_ATTR(temp##offset##_input, S_IRUGO, \
409 show_temp, NULL, offset - 1); \
410static SENSOR_DEVICE_ATTR(temp##offset##_max, S_IRUGO | S_IWUSR, \
411 show_temp_max, set_temp_max, offset - 1); \
412static SENSOR_DEVICE_ATTR(temp##offset##_min, S_IRUGO | S_IWUSR, \
413 show_temp_min, set_temp_min, offset - 1);
Linus Torvalds1da177e2005-04-16 15:20:36 -0700414
415show_temp_offset(1);
416show_temp_offset(2);
417show_temp_offset(3);
418
Jean Delvare20ad93d2005-06-05 11:53:25 +0200419static ssize_t show_sensor(struct device *dev, struct device_attribute *attr,
420 char *buf)
Linus Torvalds1da177e2005-04-16 15:20:36 -0700421{
Jean Delvare20ad93d2005-06-05 11:53:25 +0200422 struct sensor_device_attribute *sensor_attr = to_sensor_dev_attr(attr);
423 int nr = sensor_attr->index;
424
Linus Torvalds1da177e2005-04-16 15:20:36 -0700425 struct it87_data *data = it87_update_device(dev);
426 u8 reg = data->sensor; /* In case the value is updated while we use it */
427
428 if (reg & (1 << nr))
429 return sprintf(buf, "3\n"); /* thermal diode */
430 if (reg & (8 << nr))
431 return sprintf(buf, "2\n"); /* thermistor */
432 return sprintf(buf, "0\n"); /* disabled */
433}
Jean Delvare20ad93d2005-06-05 11:53:25 +0200434static ssize_t set_sensor(struct device *dev, struct device_attribute *attr,
435 const char *buf, size_t count)
Linus Torvalds1da177e2005-04-16 15:20:36 -0700436{
Jean Delvare20ad93d2005-06-05 11:53:25 +0200437 struct sensor_device_attribute *sensor_attr = to_sensor_dev_attr(attr);
438 int nr = sensor_attr->index;
439
Linus Torvalds1da177e2005-04-16 15:20:36 -0700440 struct i2c_client *client = to_i2c_client(dev);
441 struct it87_data *data = i2c_get_clientdata(client);
442 int val = simple_strtol(buf, NULL, 10);
443
444 down(&data->update_lock);
445
446 data->sensor &= ~(1 << nr);
447 data->sensor &= ~(8 << nr);
448 /* 3 = thermal diode; 2 = thermistor; 0 = disabled */
449 if (val == 3)
450 data->sensor |= 1 << nr;
451 else if (val == 2)
452 data->sensor |= 8 << nr;
453 else if (val != 0) {
454 up(&data->update_lock);
455 return -EINVAL;
456 }
457 it87_write_value(client, IT87_REG_TEMP_ENABLE, data->sensor);
458 up(&data->update_lock);
459 return count;
460}
461#define show_sensor_offset(offset) \
Jean Delvare20ad93d2005-06-05 11:53:25 +0200462static SENSOR_DEVICE_ATTR(temp##offset##_type, S_IRUGO | S_IWUSR, \
463 show_sensor, set_sensor, offset - 1);
Linus Torvalds1da177e2005-04-16 15:20:36 -0700464
465show_sensor_offset(1);
466show_sensor_offset(2);
467show_sensor_offset(3);
468
469/* 3 Fans */
Jean Delvare20ad93d2005-06-05 11:53:25 +0200470static ssize_t show_fan(struct device *dev, struct device_attribute *attr,
471 char *buf)
Linus Torvalds1da177e2005-04-16 15:20:36 -0700472{
Jean Delvare20ad93d2005-06-05 11:53:25 +0200473 struct sensor_device_attribute *sensor_attr = to_sensor_dev_attr(attr);
474 int nr = sensor_attr->index;
475
Linus Torvalds1da177e2005-04-16 15:20:36 -0700476 struct it87_data *data = it87_update_device(dev);
477 return sprintf(buf,"%d\n", FAN_FROM_REG(data->fan[nr],
478 DIV_FROM_REG(data->fan_div[nr])));
479}
Jean Delvare20ad93d2005-06-05 11:53:25 +0200480static ssize_t show_fan_min(struct device *dev, struct device_attribute *attr,
481 char *buf)
Linus Torvalds1da177e2005-04-16 15:20:36 -0700482{
Jean Delvare20ad93d2005-06-05 11:53:25 +0200483 struct sensor_device_attribute *sensor_attr = to_sensor_dev_attr(attr);
484 int nr = sensor_attr->index;
485
Linus Torvalds1da177e2005-04-16 15:20:36 -0700486 struct it87_data *data = it87_update_device(dev);
487 return sprintf(buf,"%d\n",
488 FAN_FROM_REG(data->fan_min[nr], DIV_FROM_REG(data->fan_div[nr])));
489}
Jean Delvare20ad93d2005-06-05 11:53:25 +0200490static ssize_t show_fan_div(struct device *dev, struct device_attribute *attr,
491 char *buf)
Linus Torvalds1da177e2005-04-16 15:20:36 -0700492{
Jean Delvare20ad93d2005-06-05 11:53:25 +0200493 struct sensor_device_attribute *sensor_attr = to_sensor_dev_attr(attr);
494 int nr = sensor_attr->index;
495
Linus Torvalds1da177e2005-04-16 15:20:36 -0700496 struct it87_data *data = it87_update_device(dev);
497 return sprintf(buf, "%d\n", DIV_FROM_REG(data->fan_div[nr]));
498}
Jean Delvare20ad93d2005-06-05 11:53:25 +0200499static ssize_t show_pwm_enable(struct device *dev, struct device_attribute *attr,
500 char *buf)
Linus Torvalds1da177e2005-04-16 15:20:36 -0700501{
Jean Delvare20ad93d2005-06-05 11:53:25 +0200502 struct sensor_device_attribute *sensor_attr = to_sensor_dev_attr(attr);
503 int nr = sensor_attr->index;
504
Linus Torvalds1da177e2005-04-16 15:20:36 -0700505 struct it87_data *data = it87_update_device(dev);
506 return sprintf(buf,"%d\n", (data->fan_main_ctrl & (1 << nr)) ? 1 : 0);
507}
Jean Delvare20ad93d2005-06-05 11:53:25 +0200508static ssize_t show_pwm(struct device *dev, struct device_attribute *attr,
509 char *buf)
Linus Torvalds1da177e2005-04-16 15:20:36 -0700510{
Jean Delvare20ad93d2005-06-05 11:53:25 +0200511 struct sensor_device_attribute *sensor_attr = to_sensor_dev_attr(attr);
512 int nr = sensor_attr->index;
513
Linus Torvalds1da177e2005-04-16 15:20:36 -0700514 struct it87_data *data = it87_update_device(dev);
515 return sprintf(buf,"%d\n", data->manual_pwm_ctl[nr]);
516}
Jean Delvare20ad93d2005-06-05 11:53:25 +0200517static ssize_t set_fan_min(struct device *dev, struct device_attribute *attr,
518 const char *buf, size_t count)
Linus Torvalds1da177e2005-04-16 15:20:36 -0700519{
Jean Delvare20ad93d2005-06-05 11:53:25 +0200520 struct sensor_device_attribute *sensor_attr = to_sensor_dev_attr(attr);
521 int nr = sensor_attr->index;
522
Linus Torvalds1da177e2005-04-16 15:20:36 -0700523 struct i2c_client *client = to_i2c_client(dev);
524 struct it87_data *data = i2c_get_clientdata(client);
525 int val = simple_strtol(buf, NULL, 10);
526
527 down(&data->update_lock);
528 data->fan_min[nr] = FAN_TO_REG(val, DIV_FROM_REG(data->fan_div[nr]));
529 it87_write_value(client, IT87_REG_FAN_MIN(nr), data->fan_min[nr]);
530 up(&data->update_lock);
531 return count;
532}
Jean Delvare20ad93d2005-06-05 11:53:25 +0200533static ssize_t set_fan_div(struct device *dev, struct device_attribute *attr,
534 const char *buf, size_t count)
Linus Torvalds1da177e2005-04-16 15:20:36 -0700535{
Jean Delvare20ad93d2005-06-05 11:53:25 +0200536 struct sensor_device_attribute *sensor_attr = to_sensor_dev_attr(attr);
537 int nr = sensor_attr->index;
538
Linus Torvalds1da177e2005-04-16 15:20:36 -0700539 struct i2c_client *client = to_i2c_client(dev);
540 struct it87_data *data = i2c_get_clientdata(client);
541 int val = simple_strtol(buf, NULL, 10);
542 int i, min[3];
543 u8 old;
544
545 down(&data->update_lock);
546 old = it87_read_value(client, IT87_REG_FAN_DIV);
547
548 for (i = 0; i < 3; i++)
549 min[i] = FAN_FROM_REG(data->fan_min[i], DIV_FROM_REG(data->fan_div[i]));
550
551 switch (nr) {
552 case 0:
553 case 1:
554 data->fan_div[nr] = DIV_TO_REG(val);
555 break;
556 case 2:
557 if (val < 8)
558 data->fan_div[nr] = 1;
559 else
560 data->fan_div[nr] = 3;
561 }
562 val = old & 0x80;
563 val |= (data->fan_div[0] & 0x07);
564 val |= (data->fan_div[1] & 0x07) << 3;
565 if (data->fan_div[2] == 3)
566 val |= 0x1 << 6;
567 it87_write_value(client, IT87_REG_FAN_DIV, val);
568
569 for (i = 0; i < 3; i++) {
570 data->fan_min[i]=FAN_TO_REG(min[i], DIV_FROM_REG(data->fan_div[i]));
571 it87_write_value(client, IT87_REG_FAN_MIN(i), data->fan_min[i]);
572 }
573 up(&data->update_lock);
574 return count;
575}
Jean Delvare20ad93d2005-06-05 11:53:25 +0200576static ssize_t set_pwm_enable(struct device *dev,
577 struct device_attribute *attr, const char *buf, size_t count)
Linus Torvalds1da177e2005-04-16 15:20:36 -0700578{
Jean Delvare20ad93d2005-06-05 11:53:25 +0200579 struct sensor_device_attribute *sensor_attr = to_sensor_dev_attr(attr);
580 int nr = sensor_attr->index;
581
Linus Torvalds1da177e2005-04-16 15:20:36 -0700582 struct i2c_client *client = to_i2c_client(dev);
583 struct it87_data *data = i2c_get_clientdata(client);
584 int val = simple_strtol(buf, NULL, 10);
585
586 down(&data->update_lock);
587
588 if (val == 0) {
589 int tmp;
590 /* make sure the fan is on when in on/off mode */
591 tmp = it87_read_value(client, IT87_REG_FAN_CTL);
592 it87_write_value(client, IT87_REG_FAN_CTL, tmp | (1 << nr));
593 /* set on/off mode */
594 data->fan_main_ctrl &= ~(1 << nr);
595 it87_write_value(client, IT87_REG_FAN_MAIN_CTRL, data->fan_main_ctrl);
596 } else if (val == 1) {
597 /* set SmartGuardian mode */
598 data->fan_main_ctrl |= (1 << nr);
599 it87_write_value(client, IT87_REG_FAN_MAIN_CTRL, data->fan_main_ctrl);
600 /* set saved pwm value, clear FAN_CTLX PWM mode bit */
601 it87_write_value(client, IT87_REG_PWM(nr), PWM_TO_REG(data->manual_pwm_ctl[nr]));
602 } else {
603 up(&data->update_lock);
604 return -EINVAL;
605 }
606
607 up(&data->update_lock);
608 return count;
609}
Jean Delvare20ad93d2005-06-05 11:53:25 +0200610static ssize_t set_pwm(struct device *dev, struct device_attribute *attr,
611 const char *buf, size_t count)
Linus Torvalds1da177e2005-04-16 15:20:36 -0700612{
Jean Delvare20ad93d2005-06-05 11:53:25 +0200613 struct sensor_device_attribute *sensor_attr = to_sensor_dev_attr(attr);
614 int nr = sensor_attr->index;
615
Linus Torvalds1da177e2005-04-16 15:20:36 -0700616 struct i2c_client *client = to_i2c_client(dev);
617 struct it87_data *data = i2c_get_clientdata(client);
618 int val = simple_strtol(buf, NULL, 10);
619
620 if (val < 0 || val > 255)
621 return -EINVAL;
622
623 down(&data->update_lock);
624 data->manual_pwm_ctl[nr] = val;
625 if (data->fan_main_ctrl & (1 << nr))
626 it87_write_value(client, IT87_REG_PWM(nr), PWM_TO_REG(data->manual_pwm_ctl[nr]));
627 up(&data->update_lock);
628 return count;
629}
630
Jean Delvare20ad93d2005-06-05 11:53:25 +0200631#define show_fan_offset(offset) \
632static SENSOR_DEVICE_ATTR(fan##offset##_input, S_IRUGO, \
633 show_fan, NULL, offset - 1); \
634static SENSOR_DEVICE_ATTR(fan##offset##_min, S_IRUGO | S_IWUSR, \
635 show_fan_min, set_fan_min, offset - 1); \
636static SENSOR_DEVICE_ATTR(fan##offset##_div, S_IRUGO | S_IWUSR, \
637 show_fan_div, set_fan_div, offset - 1);
Linus Torvalds1da177e2005-04-16 15:20:36 -0700638
639show_fan_offset(1);
640show_fan_offset(2);
641show_fan_offset(3);
642
643#define show_pwm_offset(offset) \
Jean Delvare20ad93d2005-06-05 11:53:25 +0200644static SENSOR_DEVICE_ATTR(pwm##offset##_enable, S_IRUGO | S_IWUSR, \
645 show_pwm_enable, set_pwm_enable, offset - 1); \
646static SENSOR_DEVICE_ATTR(pwm##offset, S_IRUGO | S_IWUSR, \
647 show_pwm, set_pwm, offset - 1);
Linus Torvalds1da177e2005-04-16 15:20:36 -0700648
649show_pwm_offset(1);
650show_pwm_offset(2);
651show_pwm_offset(3);
652
653/* Alarms */
Yani Ioannou30f74292005-05-17 06:41:35 -0400654static ssize_t show_alarms(struct device *dev, struct device_attribute *attr, char *buf)
Linus Torvalds1da177e2005-04-16 15:20:36 -0700655{
656 struct it87_data *data = it87_update_device(dev);
Jean Delvare68188ba2005-05-16 18:52:38 +0200657 return sprintf(buf, "%u\n", data->alarms);
Linus Torvalds1da177e2005-04-16 15:20:36 -0700658}
Jean Delvare1d66c642005-04-18 21:16:59 -0700659static DEVICE_ATTR(alarms, S_IRUGO, show_alarms, NULL);
Linus Torvalds1da177e2005-04-16 15:20:36 -0700660
661static ssize_t
Yani Ioannou30f74292005-05-17 06:41:35 -0400662show_vrm_reg(struct device *dev, struct device_attribute *attr, char *buf)
Linus Torvalds1da177e2005-04-16 15:20:36 -0700663{
664 struct it87_data *data = it87_update_device(dev);
665 return sprintf(buf, "%ld\n", (long) data->vrm);
666}
667static ssize_t
Yani Ioannou30f74292005-05-17 06:41:35 -0400668store_vrm_reg(struct device *dev, struct device_attribute *attr, const char *buf, size_t count)
Linus Torvalds1da177e2005-04-16 15:20:36 -0700669{
670 struct i2c_client *client = to_i2c_client(dev);
671 struct it87_data *data = i2c_get_clientdata(client);
672 u32 val;
673
674 val = simple_strtoul(buf, NULL, 10);
675 data->vrm = val;
676
677 return count;
678}
679static DEVICE_ATTR(vrm, S_IRUGO | S_IWUSR, show_vrm_reg, store_vrm_reg);
680#define device_create_file_vrm(client) \
681device_create_file(&client->dev, &dev_attr_vrm)
682
683static ssize_t
Yani Ioannou30f74292005-05-17 06:41:35 -0400684show_vid_reg(struct device *dev, struct device_attribute *attr, char *buf)
Linus Torvalds1da177e2005-04-16 15:20:36 -0700685{
686 struct it87_data *data = it87_update_device(dev);
687 return sprintf(buf, "%ld\n", (long) vid_from_reg(data->vid, data->vrm));
688}
689static DEVICE_ATTR(cpu0_vid, S_IRUGO, show_vid_reg, NULL);
690#define device_create_file_vid(client) \
691device_create_file(&client->dev, &dev_attr_cpu0_vid)
692
693/* This function is called when:
694 * it87_driver is inserted (when this module is loaded), for each
695 available adapter
696 * when a new adapter is inserted (and it87_driver is still present) */
697static int it87_attach_adapter(struct i2c_adapter *adapter)
698{
699 if (!(adapter->class & I2C_CLASS_HWMON))
700 return 0;
701 return i2c_detect(adapter, &addr_data, it87_detect);
702}
703
Jean Delvare2d8672c2005-07-19 23:56:35 +0200704static int it87_isa_attach_adapter(struct i2c_adapter *adapter)
705{
706 return it87_detect(adapter, isa_address, -1);
707}
708
709/* SuperIO detection - will change isa_address if a chip is found */
Linus Torvalds1da177e2005-04-16 15:20:36 -0700710static int it87_find(int *address)
711{
712 int err = -ENODEV;
713
714 superio_enter();
715 chip_type = superio_inw(DEVID);
716 if (chip_type != IT8712F_DEVID
717 && chip_type != IT8705F_DEVID)
718 goto exit;
719
720 superio_select();
721 if (!(superio_inb(IT87_ACT_REG) & 0x01)) {
722 pr_info("it87: Device not activated, skipping\n");
723 goto exit;
724 }
725
726 *address = superio_inw(IT87_BASE_REG) & ~(IT87_EXTENT - 1);
727 if (*address == 0) {
728 pr_info("it87: Base address not set, skipping\n");
729 goto exit;
730 }
731
732 err = 0;
733 pr_info("it87: Found IT%04xF chip at 0x%x, revision %d\n",
734 chip_type, *address, superio_inb(DEVREV) & 0x0f);
735
736exit:
737 superio_exit();
738 return err;
739}
740
741/* This function is called by i2c_detect */
742int it87_detect(struct i2c_adapter *adapter, int address, int kind)
743{
744 int i;
745 struct i2c_client *new_client;
746 struct it87_data *data;
747 int err = 0;
748 const char *name = "";
749 int is_isa = i2c_is_isa_adapter(adapter);
750 int enable_pwm_interface;
751
752 if (!is_isa &&
753 !i2c_check_functionality(adapter, I2C_FUNC_SMBUS_BYTE_DATA))
754 goto ERROR0;
755
756 /* Reserve the ISA region */
757 if (is_isa)
Jean Delvarefde09502005-07-19 23:51:07 +0200758 if (!request_region(address, IT87_EXTENT, it87_isa_driver.name))
Linus Torvalds1da177e2005-04-16 15:20:36 -0700759 goto ERROR0;
760
761 /* Probe whether there is anything available on this address. Already
762 done for SMBus and Super-I/O clients */
763 if (kind < 0) {
764 if (is_isa && !chip_type) {
765#define REALLY_SLOW_IO
766 /* We need the timeouts for at least some IT87-like chips. But only
767 if we read 'undefined' registers. */
768 i = inb_p(address + 1);
769 if (inb_p(address + 2) != i
770 || inb_p(address + 3) != i
771 || inb_p(address + 7) != i) {
772 err = -ENODEV;
773 goto ERROR1;
774 }
775#undef REALLY_SLOW_IO
776
777 /* Let's just hope nothing breaks here */
778 i = inb_p(address + 5) & 0x7f;
779 outb_p(~i & 0x7f, address + 5);
780 if ((inb_p(address + 5) & 0x7f) != (~i & 0x7f)) {
781 outb_p(i, address + 5);
782 err = -ENODEV;
783 goto ERROR1;
784 }
785 }
786 }
787
788 /* OK. For now, we presume we have a valid client. We now create the
789 client structure, even though we cannot fill it completely yet.
790 But it allows us to access it87_{read,write}_value. */
791
792 if (!(data = kmalloc(sizeof(struct it87_data), GFP_KERNEL))) {
793 err = -ENOMEM;
794 goto ERROR1;
795 }
796 memset(data, 0, sizeof(struct it87_data));
797
798 new_client = &data->client;
799 if (is_isa)
800 init_MUTEX(&data->lock);
801 i2c_set_clientdata(new_client, data);
802 new_client->addr = address;
803 new_client->adapter = adapter;
Jean Delvarefde09502005-07-19 23:51:07 +0200804 new_client->driver = is_isa ? &it87_isa_driver : &it87_driver;
Linus Torvalds1da177e2005-04-16 15:20:36 -0700805 new_client->flags = 0;
806
807 /* Now, we do the remaining detection. */
808
809 if (kind < 0) {
810 if ((it87_read_value(new_client, IT87_REG_CONFIG) & 0x80)
811 || (!is_isa
812 && it87_read_value(new_client, IT87_REG_I2C_ADDR) != address)) {
813 err = -ENODEV;
814 goto ERROR2;
815 }
816 }
817
818 /* Determine the chip type. */
819 if (kind <= 0) {
820 i = it87_read_value(new_client, IT87_REG_CHIPID);
821 if (i == 0x90) {
822 kind = it87;
823 if ((is_isa) && (chip_type == IT8712F_DEVID))
824 kind = it8712;
825 }
826 else {
827 if (kind == 0)
828 dev_info(&adapter->dev,
829 "Ignoring 'force' parameter for unknown chip at "
830 "adapter %d, address 0x%02x\n",
831 i2c_adapter_id(adapter), address);
832 err = -ENODEV;
833 goto ERROR2;
834 }
835 }
836
837 if (kind == it87) {
838 name = "it87";
839 } else if (kind == it8712) {
840 name = "it8712";
841 }
842
843 /* Fill in the remaining client fields and put it into the global list */
844 strlcpy(new_client->name, name, I2C_NAME_SIZE);
845 data->type = kind;
846 data->valid = 0;
847 init_MUTEX(&data->update_lock);
848
849 /* Tell the I2C layer a new client has arrived */
850 if ((err = i2c_attach_client(new_client)))
851 goto ERROR2;
852
853 /* Check PWM configuration */
854 enable_pwm_interface = it87_check_pwm(new_client);
855
856 /* Initialize the IT87 chip */
857 it87_init_client(new_client, data);
858
859 /* Register sysfs hooks */
Mark M. Hoffman943b0832005-07-15 21:39:18 -0400860 data->class_dev = hwmon_device_register(&new_client->dev);
861 if (IS_ERR(data->class_dev)) {
862 err = PTR_ERR(data->class_dev);
863 goto ERROR3;
864 }
865
Jean Delvare20ad93d2005-06-05 11:53:25 +0200866 device_create_file(&new_client->dev, &sensor_dev_attr_in0_input.dev_attr);
867 device_create_file(&new_client->dev, &sensor_dev_attr_in1_input.dev_attr);
868 device_create_file(&new_client->dev, &sensor_dev_attr_in2_input.dev_attr);
869 device_create_file(&new_client->dev, &sensor_dev_attr_in3_input.dev_attr);
870 device_create_file(&new_client->dev, &sensor_dev_attr_in4_input.dev_attr);
871 device_create_file(&new_client->dev, &sensor_dev_attr_in5_input.dev_attr);
872 device_create_file(&new_client->dev, &sensor_dev_attr_in6_input.dev_attr);
873 device_create_file(&new_client->dev, &sensor_dev_attr_in7_input.dev_attr);
874 device_create_file(&new_client->dev, &sensor_dev_attr_in8_input.dev_attr);
875 device_create_file(&new_client->dev, &sensor_dev_attr_in0_min.dev_attr);
876 device_create_file(&new_client->dev, &sensor_dev_attr_in1_min.dev_attr);
877 device_create_file(&new_client->dev, &sensor_dev_attr_in2_min.dev_attr);
878 device_create_file(&new_client->dev, &sensor_dev_attr_in3_min.dev_attr);
879 device_create_file(&new_client->dev, &sensor_dev_attr_in4_min.dev_attr);
880 device_create_file(&new_client->dev, &sensor_dev_attr_in5_min.dev_attr);
881 device_create_file(&new_client->dev, &sensor_dev_attr_in6_min.dev_attr);
882 device_create_file(&new_client->dev, &sensor_dev_attr_in7_min.dev_attr);
883 device_create_file(&new_client->dev, &sensor_dev_attr_in0_max.dev_attr);
884 device_create_file(&new_client->dev, &sensor_dev_attr_in1_max.dev_attr);
885 device_create_file(&new_client->dev, &sensor_dev_attr_in2_max.dev_attr);
886 device_create_file(&new_client->dev, &sensor_dev_attr_in3_max.dev_attr);
887 device_create_file(&new_client->dev, &sensor_dev_attr_in4_max.dev_attr);
888 device_create_file(&new_client->dev, &sensor_dev_attr_in5_max.dev_attr);
889 device_create_file(&new_client->dev, &sensor_dev_attr_in6_max.dev_attr);
890 device_create_file(&new_client->dev, &sensor_dev_attr_in7_max.dev_attr);
891 device_create_file(&new_client->dev, &sensor_dev_attr_temp1_input.dev_attr);
892 device_create_file(&new_client->dev, &sensor_dev_attr_temp2_input.dev_attr);
893 device_create_file(&new_client->dev, &sensor_dev_attr_temp3_input.dev_attr);
894 device_create_file(&new_client->dev, &sensor_dev_attr_temp1_max.dev_attr);
895 device_create_file(&new_client->dev, &sensor_dev_attr_temp2_max.dev_attr);
896 device_create_file(&new_client->dev, &sensor_dev_attr_temp3_max.dev_attr);
897 device_create_file(&new_client->dev, &sensor_dev_attr_temp1_min.dev_attr);
898 device_create_file(&new_client->dev, &sensor_dev_attr_temp2_min.dev_attr);
899 device_create_file(&new_client->dev, &sensor_dev_attr_temp3_min.dev_attr);
900 device_create_file(&new_client->dev, &sensor_dev_attr_temp1_type.dev_attr);
901 device_create_file(&new_client->dev, &sensor_dev_attr_temp2_type.dev_attr);
902 device_create_file(&new_client->dev, &sensor_dev_attr_temp3_type.dev_attr);
903 device_create_file(&new_client->dev, &sensor_dev_attr_fan1_input.dev_attr);
904 device_create_file(&new_client->dev, &sensor_dev_attr_fan2_input.dev_attr);
905 device_create_file(&new_client->dev, &sensor_dev_attr_fan3_input.dev_attr);
906 device_create_file(&new_client->dev, &sensor_dev_attr_fan1_min.dev_attr);
907 device_create_file(&new_client->dev, &sensor_dev_attr_fan2_min.dev_attr);
908 device_create_file(&new_client->dev, &sensor_dev_attr_fan3_min.dev_attr);
909 device_create_file(&new_client->dev, &sensor_dev_attr_fan1_div.dev_attr);
910 device_create_file(&new_client->dev, &sensor_dev_attr_fan2_div.dev_attr);
911 device_create_file(&new_client->dev, &sensor_dev_attr_fan3_div.dev_attr);
Linus Torvalds1da177e2005-04-16 15:20:36 -0700912 device_create_file(&new_client->dev, &dev_attr_alarms);
913 if (enable_pwm_interface) {
Jean Delvare20ad93d2005-06-05 11:53:25 +0200914 device_create_file(&new_client->dev, &sensor_dev_attr_pwm1_enable.dev_attr);
915 device_create_file(&new_client->dev, &sensor_dev_attr_pwm2_enable.dev_attr);
916 device_create_file(&new_client->dev, &sensor_dev_attr_pwm3_enable.dev_attr);
917 device_create_file(&new_client->dev, &sensor_dev_attr_pwm1.dev_attr);
918 device_create_file(&new_client->dev, &sensor_dev_attr_pwm2.dev_attr);
919 device_create_file(&new_client->dev, &sensor_dev_attr_pwm3.dev_attr);
Linus Torvalds1da177e2005-04-16 15:20:36 -0700920 }
921
922 if (data->type == it8712) {
923 data->vrm = i2c_which_vrm();
924 device_create_file_vrm(new_client);
925 device_create_file_vid(new_client);
926 }
927
928 return 0;
929
Mark M. Hoffman943b0832005-07-15 21:39:18 -0400930ERROR3:
931 i2c_detach_client(new_client);
Linus Torvalds1da177e2005-04-16 15:20:36 -0700932ERROR2:
933 kfree(data);
934ERROR1:
935 if (is_isa)
936 release_region(address, IT87_EXTENT);
937ERROR0:
938 return err;
939}
940
941static int it87_detach_client(struct i2c_client *client)
942{
Mark M. Hoffman943b0832005-07-15 21:39:18 -0400943 struct it87_data *data = i2c_get_clientdata(client);
Linus Torvalds1da177e2005-04-16 15:20:36 -0700944 int err;
945
Mark M. Hoffman943b0832005-07-15 21:39:18 -0400946 hwmon_device_unregister(data->class_dev);
947
Jean Delvare7bef5592005-07-27 22:14:49 +0200948 if ((err = i2c_detach_client(client)))
Linus Torvalds1da177e2005-04-16 15:20:36 -0700949 return err;
Linus Torvalds1da177e2005-04-16 15:20:36 -0700950
951 if(i2c_is_isa_client(client))
952 release_region(client->addr, IT87_EXTENT);
Mark M. Hoffman943b0832005-07-15 21:39:18 -0400953 kfree(data);
Linus Torvalds1da177e2005-04-16 15:20:36 -0700954
955 return 0;
956}
957
Steven Cole44bbe872005-05-03 18:21:25 -0600958/* The SMBus locks itself, but ISA access must be locked explicitly!
Linus Torvalds1da177e2005-04-16 15:20:36 -0700959 We don't want to lock the whole ISA bus, so we lock each client
960 separately.
961 We ignore the IT87 BUSY flag at this moment - it could lead to deadlocks,
962 would slow down the IT87 access and should not be necessary. */
963static int it87_read_value(struct i2c_client *client, u8 reg)
964{
965 struct it87_data *data = i2c_get_clientdata(client);
966
967 int res;
968 if (i2c_is_isa_client(client)) {
969 down(&data->lock);
970 outb_p(reg, client->addr + IT87_ADDR_REG_OFFSET);
971 res = inb_p(client->addr + IT87_DATA_REG_OFFSET);
972 up(&data->lock);
973 return res;
974 } else
975 return i2c_smbus_read_byte_data(client, reg);
976}
977
Steven Cole44bbe872005-05-03 18:21:25 -0600978/* The SMBus locks itself, but ISA access muse be locked explicitly!
Linus Torvalds1da177e2005-04-16 15:20:36 -0700979 We don't want to lock the whole ISA bus, so we lock each client
980 separately.
981 We ignore the IT87 BUSY flag at this moment - it could lead to deadlocks,
982 would slow down the IT87 access and should not be necessary. */
983static int it87_write_value(struct i2c_client *client, u8 reg, u8 value)
984{
985 struct it87_data *data = i2c_get_clientdata(client);
986
987 if (i2c_is_isa_client(client)) {
988 down(&data->lock);
989 outb_p(reg, client->addr + IT87_ADDR_REG_OFFSET);
990 outb_p(value, client->addr + IT87_DATA_REG_OFFSET);
991 up(&data->lock);
992 return 0;
993 } else
994 return i2c_smbus_write_byte_data(client, reg, value);
995}
996
997/* Return 1 if and only if the PWM interface is safe to use */
998static int it87_check_pwm(struct i2c_client *client)
999{
1000 /* Some BIOSes fail to correctly configure the IT87 fans. All fans off
1001 * and polarity set to active low is sign that this is the case so we
1002 * disable pwm control to protect the user. */
1003 int tmp = it87_read_value(client, IT87_REG_FAN_CTL);
1004 if ((tmp & 0x87) == 0) {
1005 if (fix_pwm_polarity) {
1006 /* The user asks us to attempt a chip reconfiguration.
1007 * This means switching to active high polarity and
1008 * inverting all fan speed values. */
1009 int i;
1010 u8 pwm[3];
1011
1012 for (i = 0; i < 3; i++)
1013 pwm[i] = it87_read_value(client,
1014 IT87_REG_PWM(i));
1015
1016 /* If any fan is in automatic pwm mode, the polarity
1017 * might be correct, as suspicious as it seems, so we
1018 * better don't change anything (but still disable the
1019 * PWM interface). */
1020 if (!((pwm[0] | pwm[1] | pwm[2]) & 0x80)) {
1021 dev_info(&client->dev, "Reconfiguring PWM to "
1022 "active high polarity\n");
1023 it87_write_value(client, IT87_REG_FAN_CTL,
1024 tmp | 0x87);
1025 for (i = 0; i < 3; i++)
1026 it87_write_value(client,
1027 IT87_REG_PWM(i),
1028 0x7f & ~pwm[i]);
1029 return 1;
1030 }
1031
1032 dev_info(&client->dev, "PWM configuration is "
1033 "too broken to be fixed\n");
1034 }
1035
1036 dev_info(&client->dev, "Detected broken BIOS "
1037 "defaults, disabling PWM interface\n");
1038 return 0;
1039 } else if (fix_pwm_polarity) {
1040 dev_info(&client->dev, "PWM configuration looks "
1041 "sane, won't touch\n");
1042 }
1043
1044 return 1;
1045}
1046
1047/* Called when we have found a new IT87. */
1048static void it87_init_client(struct i2c_client *client, struct it87_data *data)
1049{
1050 int tmp, i;
1051
1052 /* initialize to sane defaults:
1053 * - if the chip is in manual pwm mode, this will be overwritten with
1054 * the actual settings on the chip (so in this case, initialization
1055 * is not needed)
1056 * - if in automatic or on/off mode, we could switch to manual mode,
1057 * read the registers and set manual_pwm_ctl accordingly, but currently
1058 * this is not implemented, so we initialize to something sane */
1059 for (i = 0; i < 3; i++) {
1060 data->manual_pwm_ctl[i] = 0xff;
1061 }
1062
1063 /* Check if temperature channnels are reset manually or by some reason */
1064 tmp = it87_read_value(client, IT87_REG_TEMP_ENABLE);
1065 if ((tmp & 0x3f) == 0) {
1066 /* Temp1,Temp3=thermistor; Temp2=thermal diode */
1067 tmp = (tmp & 0xc0) | 0x2a;
1068 it87_write_value(client, IT87_REG_TEMP_ENABLE, tmp);
1069 }
1070 data->sensor = tmp;
1071
1072 /* Check if voltage monitors are reset manually or by some reason */
1073 tmp = it87_read_value(client, IT87_REG_VIN_ENABLE);
1074 if ((tmp & 0xff) == 0) {
1075 /* Enable all voltage monitors */
1076 it87_write_value(client, IT87_REG_VIN_ENABLE, 0xff);
1077 }
1078
1079 /* Check if tachometers are reset manually or by some reason */
1080 data->fan_main_ctrl = it87_read_value(client, IT87_REG_FAN_MAIN_CTRL);
1081 if ((data->fan_main_ctrl & 0x70) == 0) {
1082 /* Enable all fan tachometers */
1083 data->fan_main_ctrl |= 0x70;
1084 it87_write_value(client, IT87_REG_FAN_MAIN_CTRL, data->fan_main_ctrl);
1085 }
1086
1087 /* Set current fan mode registers and the default settings for the
1088 * other mode registers */
1089 for (i = 0; i < 3; i++) {
1090 if (data->fan_main_ctrl & (1 << i)) {
1091 /* pwm mode */
1092 tmp = it87_read_value(client, IT87_REG_PWM(i));
1093 if (tmp & 0x80) {
1094 /* automatic pwm - not yet implemented, but
1095 * leave the settings made by the BIOS alone
1096 * until a change is requested via the sysfs
1097 * interface */
1098 } else {
1099 /* manual pwm */
1100 data->manual_pwm_ctl[i] = PWM_FROM_REG(tmp);
1101 }
1102 }
1103 }
1104
1105 /* Start monitoring */
1106 it87_write_value(client, IT87_REG_CONFIG,
1107 (it87_read_value(client, IT87_REG_CONFIG) & 0x36)
1108 | (update_vbat ? 0x41 : 0x01));
1109}
1110
1111static struct it87_data *it87_update_device(struct device *dev)
1112{
1113 struct i2c_client *client = to_i2c_client(dev);
1114 struct it87_data *data = i2c_get_clientdata(client);
1115 int i;
1116
1117 down(&data->update_lock);
1118
1119 if (time_after(jiffies, data->last_updated + HZ + HZ / 2)
1120 || !data->valid) {
1121
1122 if (update_vbat) {
1123 /* Cleared after each update, so reenable. Value
1124 returned by this read will be previous value */
1125 it87_write_value(client, IT87_REG_CONFIG,
1126 it87_read_value(client, IT87_REG_CONFIG) | 0x40);
1127 }
1128 for (i = 0; i <= 7; i++) {
1129 data->in[i] =
1130 it87_read_value(client, IT87_REG_VIN(i));
1131 data->in_min[i] =
1132 it87_read_value(client, IT87_REG_VIN_MIN(i));
1133 data->in_max[i] =
1134 it87_read_value(client, IT87_REG_VIN_MAX(i));
1135 }
1136 data->in[8] =
1137 it87_read_value(client, IT87_REG_VIN(8));
1138 /* Temperature sensor doesn't have limit registers, set
1139 to min and max value */
1140 data->in_min[8] = 0;
1141 data->in_max[8] = 255;
1142
1143 for (i = 0; i < 3; i++) {
1144 data->fan[i] =
1145 it87_read_value(client, IT87_REG_FAN(i));
1146 data->fan_min[i] =
1147 it87_read_value(client, IT87_REG_FAN_MIN(i));
1148 }
1149 for (i = 0; i < 3; i++) {
1150 data->temp[i] =
1151 it87_read_value(client, IT87_REG_TEMP(i));
1152 data->temp_high[i] =
1153 it87_read_value(client, IT87_REG_TEMP_HIGH(i));
1154 data->temp_low[i] =
1155 it87_read_value(client, IT87_REG_TEMP_LOW(i));
1156 }
1157
1158 i = it87_read_value(client, IT87_REG_FAN_DIV);
1159 data->fan_div[0] = i & 0x07;
1160 data->fan_div[1] = (i >> 3) & 0x07;
1161 data->fan_div[2] = (i & 0x40) ? 3 : 1;
1162
1163 data->alarms =
1164 it87_read_value(client, IT87_REG_ALARM1) |
1165 (it87_read_value(client, IT87_REG_ALARM2) << 8) |
1166 (it87_read_value(client, IT87_REG_ALARM3) << 16);
1167 data->fan_main_ctrl = it87_read_value(client, IT87_REG_FAN_MAIN_CTRL);
1168
1169 data->sensor = it87_read_value(client, IT87_REG_TEMP_ENABLE);
1170 /* The 8705 does not have VID capability */
1171 if (data->type == it8712) {
1172 data->vid = it87_read_value(client, IT87_REG_VID);
1173 data->vid &= 0x1f;
1174 }
1175 data->last_updated = jiffies;
1176 data->valid = 1;
1177 }
1178
1179 up(&data->update_lock);
1180
1181 return data;
1182}
1183
1184static int __init sm_it87_init(void)
1185{
Jean Delvarefde09502005-07-19 23:51:07 +02001186 int addr, res;
Linus Torvalds1da177e2005-04-16 15:20:36 -07001187
1188 if (!it87_find(&addr)) {
Jean Delvare2d8672c2005-07-19 23:56:35 +02001189 isa_address = addr;
Linus Torvalds1da177e2005-04-16 15:20:36 -07001190 }
Jean Delvarefde09502005-07-19 23:51:07 +02001191
1192 res = i2c_add_driver(&it87_driver);
1193 if (res)
1194 return res;
1195
1196 res = i2c_isa_add_driver(&it87_isa_driver);
1197 if (res) {
1198 i2c_del_driver(&it87_driver);
1199 return res;
1200 }
1201
1202 return 0;
Linus Torvalds1da177e2005-04-16 15:20:36 -07001203}
1204
1205static void __exit sm_it87_exit(void)
1206{
Jean Delvarefde09502005-07-19 23:51:07 +02001207 i2c_isa_del_driver(&it87_isa_driver);
Linus Torvalds1da177e2005-04-16 15:20:36 -07001208 i2c_del_driver(&it87_driver);
1209}
1210
1211
1212MODULE_AUTHOR("Chris Gauthron <chrisg@0-in.com>");
1213MODULE_DESCRIPTION("IT8705F, IT8712F, Sis950 driver");
1214module_param(update_vbat, bool, 0);
1215MODULE_PARM_DESC(update_vbat, "Update vbat if set else return powerup value");
1216module_param(fix_pwm_polarity, bool, 0);
1217MODULE_PARM_DESC(fix_pwm_polarity, "Force PWM polarity to active high (DANGEROUS)");
1218MODULE_LICENSE("GPL");
1219
1220module_init(sm_it87_init);
1221module_exit(sm_it87_exit);