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1da177e4 LT |
1 | /* |
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 | ||
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> | |
39 | #include <linux/i2c-sensor.h> | |
40 | #include <linux/i2c-vid.h> | |
10c08f81 | 41 | #include <linux/hwmon-sysfs.h> |
943b0830 MH |
42 | #include <linux/hwmon.h> |
43 | #include <linux/err.h> | |
1da177e4 LT |
44 | #include <asm/io.h> |
45 | ||
46 | ||
47 | /* Addresses to scan */ | |
48 | static unsigned short normal_i2c[] = { 0x28, 0x29, 0x2a, 0x2b, 0x2c, 0x2d, | |
49 | 0x2e, 0x2f, I2C_CLIENT_END }; | |
50 | static unsigned int normal_isa[] = { 0x0290, I2C_CLIENT_ISA_END }; | |
51 | ||
52 | /* Insmod parameters */ | |
53 | SENSORS_INSMOD_2(it87, it8712); | |
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 | ||
62 | static inline int | |
63 | superio_inb(int reg) | |
64 | { | |
65 | outb(reg, REG); | |
66 | return inb(VAL); | |
67 | } | |
68 | ||
69 | static 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 | ||
79 | static inline void | |
80 | superio_select(void) | |
81 | { | |
82 | outb(DEV, REG); | |
83 | outb(PME, VAL); | |
84 | } | |
85 | ||
86 | static inline void | |
87 | superio_enter(void) | |
88 | { | |
89 | outb(0x87, REG); | |
90 | outb(0x01, REG); | |
91 | outb(0x55, REG); | |
92 | outb(0x55, REG); | |
93 | } | |
94 | ||
95 | static inline void | |
96 | superio_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 */ | |
108 | static int update_vbat; | |
109 | ||
110 | /* Not all BIOSes properly configure the PWM registers */ | |
111 | static int fix_pwm_polarity; | |
112 | ||
113 | /* Chip Type */ | |
114 | ||
115 | static 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 | ||
163 | static 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 | ||
181 | static 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. */ | |
195 | struct 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 | ||
223 | static int it87_attach_adapter(struct i2c_adapter *adapter); | |
224 | static int it87_find(int *address); | |
225 | static int it87_detect(struct i2c_adapter *adapter, int address, int kind); | |
226 | static int it87_detach_client(struct i2c_client *client); | |
227 | ||
228 | static int it87_read_value(struct i2c_client *client, u8 register); | |
229 | static int it87_write_value(struct i2c_client *client, u8 register, | |
230 | u8 value); | |
231 | static struct it87_data *it87_update_device(struct device *dev); | |
232 | static int it87_check_pwm(struct i2c_client *client); | |
233 | static void it87_init_client(struct i2c_client *client, struct it87_data *data); | |
234 | ||
235 | ||
236 | static 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 | ||
20ad93d4 JD |
245 | static ssize_t show_in(struct device *dev, struct device_attribute *attr, |
246 | char *buf) | |
1da177e4 | 247 | { |
20ad93d4 JD |
248 | struct sensor_device_attribute *sensor_attr = to_sensor_dev_attr(attr); |
249 | int nr = sensor_attr->index; | |
250 | ||
1da177e4 LT |
251 | struct it87_data *data = it87_update_device(dev); |
252 | return sprintf(buf, "%d\n", IN_FROM_REG(data->in[nr])); | |
253 | } | |
254 | ||
20ad93d4 JD |
255 | static ssize_t show_in_min(struct device *dev, struct device_attribute *attr, |
256 | char *buf) | |
1da177e4 | 257 | { |
20ad93d4 JD |
258 | struct sensor_device_attribute *sensor_attr = to_sensor_dev_attr(attr); |
259 | int nr = sensor_attr->index; | |
260 | ||
1da177e4 LT |
261 | struct it87_data *data = it87_update_device(dev); |
262 | return sprintf(buf, "%d\n", IN_FROM_REG(data->in_min[nr])); | |
263 | } | |
264 | ||
20ad93d4 JD |
265 | static ssize_t show_in_max(struct device *dev, struct device_attribute *attr, |
266 | char *buf) | |
1da177e4 | 267 | { |
20ad93d4 JD |
268 | struct sensor_device_attribute *sensor_attr = to_sensor_dev_attr(attr); |
269 | int nr = sensor_attr->index; | |
270 | ||
1da177e4 LT |
271 | struct it87_data *data = it87_update_device(dev); |
272 | return sprintf(buf, "%d\n", IN_FROM_REG(data->in_max[nr])); | |
273 | } | |
274 | ||
20ad93d4 JD |
275 | static ssize_t set_in_min(struct device *dev, struct device_attribute *attr, |
276 | const char *buf, size_t count) | |
1da177e4 | 277 | { |
20ad93d4 JD |
278 | struct sensor_device_attribute *sensor_attr = to_sensor_dev_attr(attr); |
279 | int nr = sensor_attr->index; | |
280 | ||
1da177e4 LT |
281 | struct i2c_client *client = to_i2c_client(dev); |
282 | struct it87_data *data = i2c_get_clientdata(client); | |
283 | unsigned long val = simple_strtoul(buf, NULL, 10); | |
284 | ||
285 | down(&data->update_lock); | |
286 | data->in_min[nr] = IN_TO_REG(val); | |
287 | it87_write_value(client, IT87_REG_VIN_MIN(nr), | |
288 | data->in_min[nr]); | |
289 | up(&data->update_lock); | |
290 | return count; | |
291 | } | |
20ad93d4 JD |
292 | static ssize_t set_in_max(struct device *dev, struct device_attribute *attr, |
293 | const char *buf, size_t count) | |
1da177e4 | 294 | { |
20ad93d4 JD |
295 | struct sensor_device_attribute *sensor_attr = to_sensor_dev_attr(attr); |
296 | int nr = sensor_attr->index; | |
297 | ||
1da177e4 LT |
298 | struct i2c_client *client = to_i2c_client(dev); |
299 | struct it87_data *data = i2c_get_clientdata(client); | |
300 | unsigned long val = simple_strtoul(buf, NULL, 10); | |
301 | ||
302 | down(&data->update_lock); | |
303 | data->in_max[nr] = IN_TO_REG(val); | |
304 | it87_write_value(client, IT87_REG_VIN_MAX(nr), | |
305 | data->in_max[nr]); | |
306 | up(&data->update_lock); | |
307 | return count; | |
308 | } | |
309 | ||
310 | #define show_in_offset(offset) \ | |
20ad93d4 JD |
311 | static SENSOR_DEVICE_ATTR(in##offset##_input, S_IRUGO, \ |
312 | show_in, NULL, offset); | |
1da177e4 LT |
313 | |
314 | #define limit_in_offset(offset) \ | |
20ad93d4 JD |
315 | static SENSOR_DEVICE_ATTR(in##offset##_min, S_IRUGO | S_IWUSR, \ |
316 | show_in_min, set_in_min, offset); \ | |
317 | static SENSOR_DEVICE_ATTR(in##offset##_max, S_IRUGO | S_IWUSR, \ | |
318 | show_in_max, set_in_max, offset); | |
1da177e4 LT |
319 | |
320 | show_in_offset(0); | |
321 | limit_in_offset(0); | |
322 | show_in_offset(1); | |
323 | limit_in_offset(1); | |
324 | show_in_offset(2); | |
325 | limit_in_offset(2); | |
326 | show_in_offset(3); | |
327 | limit_in_offset(3); | |
328 | show_in_offset(4); | |
329 | limit_in_offset(4); | |
330 | show_in_offset(5); | |
331 | limit_in_offset(5); | |
332 | show_in_offset(6); | |
333 | limit_in_offset(6); | |
334 | show_in_offset(7); | |
335 | limit_in_offset(7); | |
336 | show_in_offset(8); | |
337 | ||
338 | /* 3 temperatures */ | |
20ad93d4 JD |
339 | static ssize_t show_temp(struct device *dev, struct device_attribute *attr, |
340 | char *buf) | |
1da177e4 | 341 | { |
20ad93d4 JD |
342 | struct sensor_device_attribute *sensor_attr = to_sensor_dev_attr(attr); |
343 | int nr = sensor_attr->index; | |
344 | ||
1da177e4 LT |
345 | struct it87_data *data = it87_update_device(dev); |
346 | return sprintf(buf, "%d\n", TEMP_FROM_REG(data->temp[nr])); | |
347 | } | |
20ad93d4 JD |
348 | static ssize_t show_temp_max(struct device *dev, struct device_attribute *attr, |
349 | char *buf) | |
1da177e4 | 350 | { |
20ad93d4 JD |
351 | struct sensor_device_attribute *sensor_attr = to_sensor_dev_attr(attr); |
352 | int nr = sensor_attr->index; | |
353 | ||
1da177e4 LT |
354 | struct it87_data *data = it87_update_device(dev); |
355 | return sprintf(buf, "%d\n", TEMP_FROM_REG(data->temp_high[nr])); | |
356 | } | |
20ad93d4 JD |
357 | static ssize_t show_temp_min(struct device *dev, struct device_attribute *attr, |
358 | char *buf) | |
1da177e4 | 359 | { |
20ad93d4 JD |
360 | struct sensor_device_attribute *sensor_attr = to_sensor_dev_attr(attr); |
361 | int nr = sensor_attr->index; | |
362 | ||
1da177e4 LT |
363 | struct it87_data *data = it87_update_device(dev); |
364 | return sprintf(buf, "%d\n", TEMP_FROM_REG(data->temp_low[nr])); | |
365 | } | |
20ad93d4 JD |
366 | static ssize_t set_temp_max(struct device *dev, struct device_attribute *attr, |
367 | const char *buf, size_t count) | |
1da177e4 | 368 | { |
20ad93d4 JD |
369 | struct sensor_device_attribute *sensor_attr = to_sensor_dev_attr(attr); |
370 | int nr = sensor_attr->index; | |
371 | ||
1da177e4 LT |
372 | struct i2c_client *client = to_i2c_client(dev); |
373 | struct it87_data *data = i2c_get_clientdata(client); | |
374 | int val = simple_strtol(buf, NULL, 10); | |
375 | ||
376 | down(&data->update_lock); | |
377 | data->temp_high[nr] = TEMP_TO_REG(val); | |
378 | it87_write_value(client, IT87_REG_TEMP_HIGH(nr), data->temp_high[nr]); | |
379 | up(&data->update_lock); | |
380 | return count; | |
381 | } | |
20ad93d4 JD |
382 | static ssize_t set_temp_min(struct device *dev, struct device_attribute *attr, |
383 | const char *buf, size_t count) | |
1da177e4 | 384 | { |
20ad93d4 JD |
385 | struct sensor_device_attribute *sensor_attr = to_sensor_dev_attr(attr); |
386 | int nr = sensor_attr->index; | |
387 | ||
1da177e4 LT |
388 | struct i2c_client *client = to_i2c_client(dev); |
389 | struct it87_data *data = i2c_get_clientdata(client); | |
390 | int val = simple_strtol(buf, NULL, 10); | |
391 | ||
392 | down(&data->update_lock); | |
393 | data->temp_low[nr] = TEMP_TO_REG(val); | |
394 | it87_write_value(client, IT87_REG_TEMP_LOW(nr), data->temp_low[nr]); | |
395 | up(&data->update_lock); | |
396 | return count; | |
397 | } | |
398 | #define show_temp_offset(offset) \ | |
20ad93d4 JD |
399 | static SENSOR_DEVICE_ATTR(temp##offset##_input, S_IRUGO, \ |
400 | show_temp, NULL, offset - 1); \ | |
401 | static SENSOR_DEVICE_ATTR(temp##offset##_max, S_IRUGO | S_IWUSR, \ | |
402 | show_temp_max, set_temp_max, offset - 1); \ | |
403 | static SENSOR_DEVICE_ATTR(temp##offset##_min, S_IRUGO | S_IWUSR, \ | |
404 | show_temp_min, set_temp_min, offset - 1); | |
1da177e4 LT |
405 | |
406 | show_temp_offset(1); | |
407 | show_temp_offset(2); | |
408 | show_temp_offset(3); | |
409 | ||
20ad93d4 JD |
410 | static ssize_t show_sensor(struct device *dev, struct device_attribute *attr, |
411 | char *buf) | |
1da177e4 | 412 | { |
20ad93d4 JD |
413 | struct sensor_device_attribute *sensor_attr = to_sensor_dev_attr(attr); |
414 | int nr = sensor_attr->index; | |
415 | ||
1da177e4 LT |
416 | struct it87_data *data = it87_update_device(dev); |
417 | u8 reg = data->sensor; /* In case the value is updated while we use it */ | |
418 | ||
419 | if (reg & (1 << nr)) | |
420 | return sprintf(buf, "3\n"); /* thermal diode */ | |
421 | if (reg & (8 << nr)) | |
422 | return sprintf(buf, "2\n"); /* thermistor */ | |
423 | return sprintf(buf, "0\n"); /* disabled */ | |
424 | } | |
20ad93d4 JD |
425 | static ssize_t set_sensor(struct device *dev, struct device_attribute *attr, |
426 | const char *buf, size_t count) | |
1da177e4 | 427 | { |
20ad93d4 JD |
428 | struct sensor_device_attribute *sensor_attr = to_sensor_dev_attr(attr); |
429 | int nr = sensor_attr->index; | |
430 | ||
1da177e4 LT |
431 | struct i2c_client *client = to_i2c_client(dev); |
432 | struct it87_data *data = i2c_get_clientdata(client); | |
433 | int val = simple_strtol(buf, NULL, 10); | |
434 | ||
435 | down(&data->update_lock); | |
436 | ||
437 | data->sensor &= ~(1 << nr); | |
438 | data->sensor &= ~(8 << nr); | |
439 | /* 3 = thermal diode; 2 = thermistor; 0 = disabled */ | |
440 | if (val == 3) | |
441 | data->sensor |= 1 << nr; | |
442 | else if (val == 2) | |
443 | data->sensor |= 8 << nr; | |
444 | else if (val != 0) { | |
445 | up(&data->update_lock); | |
446 | return -EINVAL; | |
447 | } | |
448 | it87_write_value(client, IT87_REG_TEMP_ENABLE, data->sensor); | |
449 | up(&data->update_lock); | |
450 | return count; | |
451 | } | |
452 | #define show_sensor_offset(offset) \ | |
20ad93d4 JD |
453 | static SENSOR_DEVICE_ATTR(temp##offset##_type, S_IRUGO | S_IWUSR, \ |
454 | show_sensor, set_sensor, offset - 1); | |
1da177e4 LT |
455 | |
456 | show_sensor_offset(1); | |
457 | show_sensor_offset(2); | |
458 | show_sensor_offset(3); | |
459 | ||
460 | /* 3 Fans */ | |
20ad93d4 JD |
461 | static ssize_t show_fan(struct device *dev, struct device_attribute *attr, |
462 | char *buf) | |
1da177e4 | 463 | { |
20ad93d4 JD |
464 | struct sensor_device_attribute *sensor_attr = to_sensor_dev_attr(attr); |
465 | int nr = sensor_attr->index; | |
466 | ||
1da177e4 LT |
467 | struct it87_data *data = it87_update_device(dev); |
468 | return sprintf(buf,"%d\n", FAN_FROM_REG(data->fan[nr], | |
469 | DIV_FROM_REG(data->fan_div[nr]))); | |
470 | } | |
20ad93d4 JD |
471 | static ssize_t show_fan_min(struct device *dev, struct device_attribute *attr, |
472 | char *buf) | |
1da177e4 | 473 | { |
20ad93d4 JD |
474 | struct sensor_device_attribute *sensor_attr = to_sensor_dev_attr(attr); |
475 | int nr = sensor_attr->index; | |
476 | ||
1da177e4 LT |
477 | struct it87_data *data = it87_update_device(dev); |
478 | return sprintf(buf,"%d\n", | |
479 | FAN_FROM_REG(data->fan_min[nr], DIV_FROM_REG(data->fan_div[nr]))); | |
480 | } | |
20ad93d4 JD |
481 | static ssize_t show_fan_div(struct device *dev, struct device_attribute *attr, |
482 | char *buf) | |
1da177e4 | 483 | { |
20ad93d4 JD |
484 | struct sensor_device_attribute *sensor_attr = to_sensor_dev_attr(attr); |
485 | int nr = sensor_attr->index; | |
486 | ||
1da177e4 LT |
487 | struct it87_data *data = it87_update_device(dev); |
488 | return sprintf(buf, "%d\n", DIV_FROM_REG(data->fan_div[nr])); | |
489 | } | |
20ad93d4 JD |
490 | static ssize_t show_pwm_enable(struct device *dev, struct device_attribute *attr, |
491 | char *buf) | |
1da177e4 | 492 | { |
20ad93d4 JD |
493 | struct sensor_device_attribute *sensor_attr = to_sensor_dev_attr(attr); |
494 | int nr = sensor_attr->index; | |
495 | ||
1da177e4 LT |
496 | struct it87_data *data = it87_update_device(dev); |
497 | return sprintf(buf,"%d\n", (data->fan_main_ctrl & (1 << nr)) ? 1 : 0); | |
498 | } | |
20ad93d4 JD |
499 | static ssize_t show_pwm(struct device *dev, struct device_attribute *attr, |
500 | char *buf) | |
1da177e4 | 501 | { |
20ad93d4 JD |
502 | struct sensor_device_attribute *sensor_attr = to_sensor_dev_attr(attr); |
503 | int nr = sensor_attr->index; | |
504 | ||
1da177e4 LT |
505 | struct it87_data *data = it87_update_device(dev); |
506 | return sprintf(buf,"%d\n", data->manual_pwm_ctl[nr]); | |
507 | } | |
20ad93d4 JD |
508 | static ssize_t set_fan_min(struct device *dev, struct device_attribute *attr, |
509 | const char *buf, size_t count) | |
1da177e4 | 510 | { |
20ad93d4 JD |
511 | struct sensor_device_attribute *sensor_attr = to_sensor_dev_attr(attr); |
512 | int nr = sensor_attr->index; | |
513 | ||
1da177e4 LT |
514 | struct i2c_client *client = to_i2c_client(dev); |
515 | struct it87_data *data = i2c_get_clientdata(client); | |
516 | int val = simple_strtol(buf, NULL, 10); | |
517 | ||
518 | down(&data->update_lock); | |
519 | data->fan_min[nr] = FAN_TO_REG(val, DIV_FROM_REG(data->fan_div[nr])); | |
520 | it87_write_value(client, IT87_REG_FAN_MIN(nr), data->fan_min[nr]); | |
521 | up(&data->update_lock); | |
522 | return count; | |
523 | } | |
20ad93d4 JD |
524 | static ssize_t set_fan_div(struct device *dev, struct device_attribute *attr, |
525 | const char *buf, size_t count) | |
1da177e4 | 526 | { |
20ad93d4 JD |
527 | struct sensor_device_attribute *sensor_attr = to_sensor_dev_attr(attr); |
528 | int nr = sensor_attr->index; | |
529 | ||
1da177e4 LT |
530 | struct i2c_client *client = to_i2c_client(dev); |
531 | struct it87_data *data = i2c_get_clientdata(client); | |
532 | int val = simple_strtol(buf, NULL, 10); | |
533 | int i, min[3]; | |
534 | u8 old; | |
535 | ||
536 | down(&data->update_lock); | |
537 | old = it87_read_value(client, IT87_REG_FAN_DIV); | |
538 | ||
539 | for (i = 0; i < 3; i++) | |
540 | min[i] = FAN_FROM_REG(data->fan_min[i], DIV_FROM_REG(data->fan_div[i])); | |
541 | ||
542 | switch (nr) { | |
543 | case 0: | |
544 | case 1: | |
545 | data->fan_div[nr] = DIV_TO_REG(val); | |
546 | break; | |
547 | case 2: | |
548 | if (val < 8) | |
549 | data->fan_div[nr] = 1; | |
550 | else | |
551 | data->fan_div[nr] = 3; | |
552 | } | |
553 | val = old & 0x80; | |
554 | val |= (data->fan_div[0] & 0x07); | |
555 | val |= (data->fan_div[1] & 0x07) << 3; | |
556 | if (data->fan_div[2] == 3) | |
557 | val |= 0x1 << 6; | |
558 | it87_write_value(client, IT87_REG_FAN_DIV, val); | |
559 | ||
560 | for (i = 0; i < 3; i++) { | |
561 | data->fan_min[i]=FAN_TO_REG(min[i], DIV_FROM_REG(data->fan_div[i])); | |
562 | it87_write_value(client, IT87_REG_FAN_MIN(i), data->fan_min[i]); | |
563 | } | |
564 | up(&data->update_lock); | |
565 | return count; | |
566 | } | |
20ad93d4 JD |
567 | static ssize_t set_pwm_enable(struct device *dev, |
568 | struct device_attribute *attr, const char *buf, size_t count) | |
1da177e4 | 569 | { |
20ad93d4 JD |
570 | struct sensor_device_attribute *sensor_attr = to_sensor_dev_attr(attr); |
571 | int nr = sensor_attr->index; | |
572 | ||
1da177e4 LT |
573 | struct i2c_client *client = to_i2c_client(dev); |
574 | struct it87_data *data = i2c_get_clientdata(client); | |
575 | int val = simple_strtol(buf, NULL, 10); | |
576 | ||
577 | down(&data->update_lock); | |
578 | ||
579 | if (val == 0) { | |
580 | int tmp; | |
581 | /* make sure the fan is on when in on/off mode */ | |
582 | tmp = it87_read_value(client, IT87_REG_FAN_CTL); | |
583 | it87_write_value(client, IT87_REG_FAN_CTL, tmp | (1 << nr)); | |
584 | /* set on/off mode */ | |
585 | data->fan_main_ctrl &= ~(1 << nr); | |
586 | it87_write_value(client, IT87_REG_FAN_MAIN_CTRL, data->fan_main_ctrl); | |
587 | } else if (val == 1) { | |
588 | /* set SmartGuardian mode */ | |
589 | data->fan_main_ctrl |= (1 << nr); | |
590 | it87_write_value(client, IT87_REG_FAN_MAIN_CTRL, data->fan_main_ctrl); | |
591 | /* set saved pwm value, clear FAN_CTLX PWM mode bit */ | |
592 | it87_write_value(client, IT87_REG_PWM(nr), PWM_TO_REG(data->manual_pwm_ctl[nr])); | |
593 | } else { | |
594 | up(&data->update_lock); | |
595 | return -EINVAL; | |
596 | } | |
597 | ||
598 | up(&data->update_lock); | |
599 | return count; | |
600 | } | |
20ad93d4 JD |
601 | static ssize_t set_pwm(struct device *dev, struct device_attribute *attr, |
602 | const char *buf, size_t count) | |
1da177e4 | 603 | { |
20ad93d4 JD |
604 | struct sensor_device_attribute *sensor_attr = to_sensor_dev_attr(attr); |
605 | int nr = sensor_attr->index; | |
606 | ||
1da177e4 LT |
607 | struct i2c_client *client = to_i2c_client(dev); |
608 | struct it87_data *data = i2c_get_clientdata(client); | |
609 | int val = simple_strtol(buf, NULL, 10); | |
610 | ||
611 | if (val < 0 || val > 255) | |
612 | return -EINVAL; | |
613 | ||
614 | down(&data->update_lock); | |
615 | data->manual_pwm_ctl[nr] = val; | |
616 | if (data->fan_main_ctrl & (1 << nr)) | |
617 | it87_write_value(client, IT87_REG_PWM(nr), PWM_TO_REG(data->manual_pwm_ctl[nr])); | |
618 | up(&data->update_lock); | |
619 | return count; | |
620 | } | |
621 | ||
20ad93d4 JD |
622 | #define show_fan_offset(offset) \ |
623 | static SENSOR_DEVICE_ATTR(fan##offset##_input, S_IRUGO, \ | |
624 | show_fan, NULL, offset - 1); \ | |
625 | static SENSOR_DEVICE_ATTR(fan##offset##_min, S_IRUGO | S_IWUSR, \ | |
626 | show_fan_min, set_fan_min, offset - 1); \ | |
627 | static SENSOR_DEVICE_ATTR(fan##offset##_div, S_IRUGO | S_IWUSR, \ | |
628 | show_fan_div, set_fan_div, offset - 1); | |
1da177e4 LT |
629 | |
630 | show_fan_offset(1); | |
631 | show_fan_offset(2); | |
632 | show_fan_offset(3); | |
633 | ||
634 | #define show_pwm_offset(offset) \ | |
20ad93d4 JD |
635 | static SENSOR_DEVICE_ATTR(pwm##offset##_enable, S_IRUGO | S_IWUSR, \ |
636 | show_pwm_enable, set_pwm_enable, offset - 1); \ | |
637 | static SENSOR_DEVICE_ATTR(pwm##offset, S_IRUGO | S_IWUSR, \ | |
638 | show_pwm, set_pwm, offset - 1); | |
1da177e4 LT |
639 | |
640 | show_pwm_offset(1); | |
641 | show_pwm_offset(2); | |
642 | show_pwm_offset(3); | |
643 | ||
644 | /* Alarms */ | |
30f74292 | 645 | static ssize_t show_alarms(struct device *dev, struct device_attribute *attr, char *buf) |
1da177e4 LT |
646 | { |
647 | struct it87_data *data = it87_update_device(dev); | |
68188ba7 | 648 | return sprintf(buf, "%u\n", data->alarms); |
1da177e4 | 649 | } |
1d66c64c | 650 | static DEVICE_ATTR(alarms, S_IRUGO, show_alarms, NULL); |
1da177e4 LT |
651 | |
652 | static ssize_t | |
30f74292 | 653 | show_vrm_reg(struct device *dev, struct device_attribute *attr, char *buf) |
1da177e4 LT |
654 | { |
655 | struct it87_data *data = it87_update_device(dev); | |
656 | return sprintf(buf, "%ld\n", (long) data->vrm); | |
657 | } | |
658 | static ssize_t | |
30f74292 | 659 | store_vrm_reg(struct device *dev, struct device_attribute *attr, const char *buf, size_t count) |
1da177e4 LT |
660 | { |
661 | struct i2c_client *client = to_i2c_client(dev); | |
662 | struct it87_data *data = i2c_get_clientdata(client); | |
663 | u32 val; | |
664 | ||
665 | val = simple_strtoul(buf, NULL, 10); | |
666 | data->vrm = val; | |
667 | ||
668 | return count; | |
669 | } | |
670 | static DEVICE_ATTR(vrm, S_IRUGO | S_IWUSR, show_vrm_reg, store_vrm_reg); | |
671 | #define device_create_file_vrm(client) \ | |
672 | device_create_file(&client->dev, &dev_attr_vrm) | |
673 | ||
674 | static ssize_t | |
30f74292 | 675 | show_vid_reg(struct device *dev, struct device_attribute *attr, char *buf) |
1da177e4 LT |
676 | { |
677 | struct it87_data *data = it87_update_device(dev); | |
678 | return sprintf(buf, "%ld\n", (long) vid_from_reg(data->vid, data->vrm)); | |
679 | } | |
680 | static DEVICE_ATTR(cpu0_vid, S_IRUGO, show_vid_reg, NULL); | |
681 | #define device_create_file_vid(client) \ | |
682 | device_create_file(&client->dev, &dev_attr_cpu0_vid) | |
683 | ||
684 | /* This function is called when: | |
685 | * it87_driver is inserted (when this module is loaded), for each | |
686 | available adapter | |
687 | * when a new adapter is inserted (and it87_driver is still present) */ | |
688 | static int it87_attach_adapter(struct i2c_adapter *adapter) | |
689 | { | |
690 | if (!(adapter->class & I2C_CLASS_HWMON)) | |
691 | return 0; | |
692 | return i2c_detect(adapter, &addr_data, it87_detect); | |
693 | } | |
694 | ||
695 | /* SuperIO detection - will change normal_isa[0] if a chip is found */ | |
696 | static int it87_find(int *address) | |
697 | { | |
698 | int err = -ENODEV; | |
699 | ||
700 | superio_enter(); | |
701 | chip_type = superio_inw(DEVID); | |
702 | if (chip_type != IT8712F_DEVID | |
703 | && chip_type != IT8705F_DEVID) | |
704 | goto exit; | |
705 | ||
706 | superio_select(); | |
707 | if (!(superio_inb(IT87_ACT_REG) & 0x01)) { | |
708 | pr_info("it87: Device not activated, skipping\n"); | |
709 | goto exit; | |
710 | } | |
711 | ||
712 | *address = superio_inw(IT87_BASE_REG) & ~(IT87_EXTENT - 1); | |
713 | if (*address == 0) { | |
714 | pr_info("it87: Base address not set, skipping\n"); | |
715 | goto exit; | |
716 | } | |
717 | ||
718 | err = 0; | |
719 | pr_info("it87: Found IT%04xF chip at 0x%x, revision %d\n", | |
720 | chip_type, *address, superio_inb(DEVREV) & 0x0f); | |
721 | ||
722 | exit: | |
723 | superio_exit(); | |
724 | return err; | |
725 | } | |
726 | ||
727 | /* This function is called by i2c_detect */ | |
728 | int it87_detect(struct i2c_adapter *adapter, int address, int kind) | |
729 | { | |
730 | int i; | |
731 | struct i2c_client *new_client; | |
732 | struct it87_data *data; | |
733 | int err = 0; | |
734 | const char *name = ""; | |
735 | int is_isa = i2c_is_isa_adapter(adapter); | |
736 | int enable_pwm_interface; | |
737 | ||
738 | if (!is_isa && | |
739 | !i2c_check_functionality(adapter, I2C_FUNC_SMBUS_BYTE_DATA)) | |
740 | goto ERROR0; | |
741 | ||
742 | /* Reserve the ISA region */ | |
743 | if (is_isa) | |
744 | if (!request_region(address, IT87_EXTENT, it87_driver.name)) | |
745 | goto ERROR0; | |
746 | ||
747 | /* Probe whether there is anything available on this address. Already | |
748 | done for SMBus and Super-I/O clients */ | |
749 | if (kind < 0) { | |
750 | if (is_isa && !chip_type) { | |
751 | #define REALLY_SLOW_IO | |
752 | /* We need the timeouts for at least some IT87-like chips. But only | |
753 | if we read 'undefined' registers. */ | |
754 | i = inb_p(address + 1); | |
755 | if (inb_p(address + 2) != i | |
756 | || inb_p(address + 3) != i | |
757 | || inb_p(address + 7) != i) { | |
758 | err = -ENODEV; | |
759 | goto ERROR1; | |
760 | } | |
761 | #undef REALLY_SLOW_IO | |
762 | ||
763 | /* Let's just hope nothing breaks here */ | |
764 | i = inb_p(address + 5) & 0x7f; | |
765 | outb_p(~i & 0x7f, address + 5); | |
766 | if ((inb_p(address + 5) & 0x7f) != (~i & 0x7f)) { | |
767 | outb_p(i, address + 5); | |
768 | err = -ENODEV; | |
769 | goto ERROR1; | |
770 | } | |
771 | } | |
772 | } | |
773 | ||
774 | /* OK. For now, we presume we have a valid client. We now create the | |
775 | client structure, even though we cannot fill it completely yet. | |
776 | But it allows us to access it87_{read,write}_value. */ | |
777 | ||
778 | if (!(data = kmalloc(sizeof(struct it87_data), GFP_KERNEL))) { | |
779 | err = -ENOMEM; | |
780 | goto ERROR1; | |
781 | } | |
782 | memset(data, 0, sizeof(struct it87_data)); | |
783 | ||
784 | new_client = &data->client; | |
785 | if (is_isa) | |
786 | init_MUTEX(&data->lock); | |
787 | i2c_set_clientdata(new_client, data); | |
788 | new_client->addr = address; | |
789 | new_client->adapter = adapter; | |
790 | new_client->driver = &it87_driver; | |
791 | new_client->flags = 0; | |
792 | ||
793 | /* Now, we do the remaining detection. */ | |
794 | ||
795 | if (kind < 0) { | |
796 | if ((it87_read_value(new_client, IT87_REG_CONFIG) & 0x80) | |
797 | || (!is_isa | |
798 | && it87_read_value(new_client, IT87_REG_I2C_ADDR) != address)) { | |
799 | err = -ENODEV; | |
800 | goto ERROR2; | |
801 | } | |
802 | } | |
803 | ||
804 | /* Determine the chip type. */ | |
805 | if (kind <= 0) { | |
806 | i = it87_read_value(new_client, IT87_REG_CHIPID); | |
807 | if (i == 0x90) { | |
808 | kind = it87; | |
809 | if ((is_isa) && (chip_type == IT8712F_DEVID)) | |
810 | kind = it8712; | |
811 | } | |
812 | else { | |
813 | if (kind == 0) | |
814 | dev_info(&adapter->dev, | |
815 | "Ignoring 'force' parameter for unknown chip at " | |
816 | "adapter %d, address 0x%02x\n", | |
817 | i2c_adapter_id(adapter), address); | |
818 | err = -ENODEV; | |
819 | goto ERROR2; | |
820 | } | |
821 | } | |
822 | ||
823 | if (kind == it87) { | |
824 | name = "it87"; | |
825 | } else if (kind == it8712) { | |
826 | name = "it8712"; | |
827 | } | |
828 | ||
829 | /* Fill in the remaining client fields and put it into the global list */ | |
830 | strlcpy(new_client->name, name, I2C_NAME_SIZE); | |
831 | data->type = kind; | |
832 | data->valid = 0; | |
833 | init_MUTEX(&data->update_lock); | |
834 | ||
835 | /* Tell the I2C layer a new client has arrived */ | |
836 | if ((err = i2c_attach_client(new_client))) | |
837 | goto ERROR2; | |
838 | ||
839 | /* Check PWM configuration */ | |
840 | enable_pwm_interface = it87_check_pwm(new_client); | |
841 | ||
842 | /* Initialize the IT87 chip */ | |
843 | it87_init_client(new_client, data); | |
844 | ||
845 | /* Register sysfs hooks */ | |
943b0830 MH |
846 | data->class_dev = hwmon_device_register(&new_client->dev); |
847 | if (IS_ERR(data->class_dev)) { | |
848 | err = PTR_ERR(data->class_dev); | |
849 | goto ERROR3; | |
850 | } | |
851 | ||
20ad93d4 JD |
852 | device_create_file(&new_client->dev, &sensor_dev_attr_in0_input.dev_attr); |
853 | device_create_file(&new_client->dev, &sensor_dev_attr_in1_input.dev_attr); | |
854 | device_create_file(&new_client->dev, &sensor_dev_attr_in2_input.dev_attr); | |
855 | device_create_file(&new_client->dev, &sensor_dev_attr_in3_input.dev_attr); | |
856 | device_create_file(&new_client->dev, &sensor_dev_attr_in4_input.dev_attr); | |
857 | device_create_file(&new_client->dev, &sensor_dev_attr_in5_input.dev_attr); | |
858 | device_create_file(&new_client->dev, &sensor_dev_attr_in6_input.dev_attr); | |
859 | device_create_file(&new_client->dev, &sensor_dev_attr_in7_input.dev_attr); | |
860 | device_create_file(&new_client->dev, &sensor_dev_attr_in8_input.dev_attr); | |
861 | device_create_file(&new_client->dev, &sensor_dev_attr_in0_min.dev_attr); | |
862 | device_create_file(&new_client->dev, &sensor_dev_attr_in1_min.dev_attr); | |
863 | device_create_file(&new_client->dev, &sensor_dev_attr_in2_min.dev_attr); | |
864 | device_create_file(&new_client->dev, &sensor_dev_attr_in3_min.dev_attr); | |
865 | device_create_file(&new_client->dev, &sensor_dev_attr_in4_min.dev_attr); | |
866 | device_create_file(&new_client->dev, &sensor_dev_attr_in5_min.dev_attr); | |
867 | device_create_file(&new_client->dev, &sensor_dev_attr_in6_min.dev_attr); | |
868 | device_create_file(&new_client->dev, &sensor_dev_attr_in7_min.dev_attr); | |
869 | device_create_file(&new_client->dev, &sensor_dev_attr_in0_max.dev_attr); | |
870 | device_create_file(&new_client->dev, &sensor_dev_attr_in1_max.dev_attr); | |
871 | device_create_file(&new_client->dev, &sensor_dev_attr_in2_max.dev_attr); | |
872 | device_create_file(&new_client->dev, &sensor_dev_attr_in3_max.dev_attr); | |
873 | device_create_file(&new_client->dev, &sensor_dev_attr_in4_max.dev_attr); | |
874 | device_create_file(&new_client->dev, &sensor_dev_attr_in5_max.dev_attr); | |
875 | device_create_file(&new_client->dev, &sensor_dev_attr_in6_max.dev_attr); | |
876 | device_create_file(&new_client->dev, &sensor_dev_attr_in7_max.dev_attr); | |
877 | device_create_file(&new_client->dev, &sensor_dev_attr_temp1_input.dev_attr); | |
878 | device_create_file(&new_client->dev, &sensor_dev_attr_temp2_input.dev_attr); | |
879 | device_create_file(&new_client->dev, &sensor_dev_attr_temp3_input.dev_attr); | |
880 | device_create_file(&new_client->dev, &sensor_dev_attr_temp1_max.dev_attr); | |
881 | device_create_file(&new_client->dev, &sensor_dev_attr_temp2_max.dev_attr); | |
882 | device_create_file(&new_client->dev, &sensor_dev_attr_temp3_max.dev_attr); | |
883 | device_create_file(&new_client->dev, &sensor_dev_attr_temp1_min.dev_attr); | |
884 | device_create_file(&new_client->dev, &sensor_dev_attr_temp2_min.dev_attr); | |
885 | device_create_file(&new_client->dev, &sensor_dev_attr_temp3_min.dev_attr); | |
886 | device_create_file(&new_client->dev, &sensor_dev_attr_temp1_type.dev_attr); | |
887 | device_create_file(&new_client->dev, &sensor_dev_attr_temp2_type.dev_attr); | |
888 | device_create_file(&new_client->dev, &sensor_dev_attr_temp3_type.dev_attr); | |
889 | device_create_file(&new_client->dev, &sensor_dev_attr_fan1_input.dev_attr); | |
890 | device_create_file(&new_client->dev, &sensor_dev_attr_fan2_input.dev_attr); | |
891 | device_create_file(&new_client->dev, &sensor_dev_attr_fan3_input.dev_attr); | |
892 | device_create_file(&new_client->dev, &sensor_dev_attr_fan1_min.dev_attr); | |
893 | device_create_file(&new_client->dev, &sensor_dev_attr_fan2_min.dev_attr); | |
894 | device_create_file(&new_client->dev, &sensor_dev_attr_fan3_min.dev_attr); | |
895 | device_create_file(&new_client->dev, &sensor_dev_attr_fan1_div.dev_attr); | |
896 | device_create_file(&new_client->dev, &sensor_dev_attr_fan2_div.dev_attr); | |
897 | device_create_file(&new_client->dev, &sensor_dev_attr_fan3_div.dev_attr); | |
1da177e4 LT |
898 | device_create_file(&new_client->dev, &dev_attr_alarms); |
899 | if (enable_pwm_interface) { | |
20ad93d4 JD |
900 | device_create_file(&new_client->dev, &sensor_dev_attr_pwm1_enable.dev_attr); |
901 | device_create_file(&new_client->dev, &sensor_dev_attr_pwm2_enable.dev_attr); | |
902 | device_create_file(&new_client->dev, &sensor_dev_attr_pwm3_enable.dev_attr); | |
903 | device_create_file(&new_client->dev, &sensor_dev_attr_pwm1.dev_attr); | |
904 | device_create_file(&new_client->dev, &sensor_dev_attr_pwm2.dev_attr); | |
905 | device_create_file(&new_client->dev, &sensor_dev_attr_pwm3.dev_attr); | |
1da177e4 LT |
906 | } |
907 | ||
908 | if (data->type == it8712) { | |
909 | data->vrm = i2c_which_vrm(); | |
910 | device_create_file_vrm(new_client); | |
911 | device_create_file_vid(new_client); | |
912 | } | |
913 | ||
914 | return 0; | |
915 | ||
943b0830 MH |
916 | ERROR3: |
917 | i2c_detach_client(new_client); | |
1da177e4 LT |
918 | ERROR2: |
919 | kfree(data); | |
920 | ERROR1: | |
921 | if (is_isa) | |
922 | release_region(address, IT87_EXTENT); | |
923 | ERROR0: | |
924 | return err; | |
925 | } | |
926 | ||
927 | static int it87_detach_client(struct i2c_client *client) | |
928 | { | |
943b0830 | 929 | struct it87_data *data = i2c_get_clientdata(client); |
1da177e4 LT |
930 | int err; |
931 | ||
943b0830 MH |
932 | hwmon_device_unregister(data->class_dev); |
933 | ||
1da177e4 LT |
934 | if ((err = i2c_detach_client(client))) { |
935 | dev_err(&client->dev, | |
936 | "Client deregistration failed, client not detached.\n"); | |
937 | return err; | |
938 | } | |
939 | ||
940 | if(i2c_is_isa_client(client)) | |
941 | release_region(client->addr, IT87_EXTENT); | |
943b0830 | 942 | kfree(data); |
1da177e4 LT |
943 | |
944 | return 0; | |
945 | } | |
946 | ||
44bbe87e | 947 | /* The SMBus locks itself, but ISA access must be locked explicitly! |
1da177e4 LT |
948 | We don't want to lock the whole ISA bus, so we lock each client |
949 | separately. | |
950 | We ignore the IT87 BUSY flag at this moment - it could lead to deadlocks, | |
951 | would slow down the IT87 access and should not be necessary. */ | |
952 | static int it87_read_value(struct i2c_client *client, u8 reg) | |
953 | { | |
954 | struct it87_data *data = i2c_get_clientdata(client); | |
955 | ||
956 | int res; | |
957 | if (i2c_is_isa_client(client)) { | |
958 | down(&data->lock); | |
959 | outb_p(reg, client->addr + IT87_ADDR_REG_OFFSET); | |
960 | res = inb_p(client->addr + IT87_DATA_REG_OFFSET); | |
961 | up(&data->lock); | |
962 | return res; | |
963 | } else | |
964 | return i2c_smbus_read_byte_data(client, reg); | |
965 | } | |
966 | ||
44bbe87e | 967 | /* The SMBus locks itself, but ISA access muse be locked explicitly! |
1da177e4 LT |
968 | We don't want to lock the whole ISA bus, so we lock each client |
969 | separately. | |
970 | We ignore the IT87 BUSY flag at this moment - it could lead to deadlocks, | |
971 | would slow down the IT87 access and should not be necessary. */ | |
972 | static int it87_write_value(struct i2c_client *client, u8 reg, u8 value) | |
973 | { | |
974 | struct it87_data *data = i2c_get_clientdata(client); | |
975 | ||
976 | if (i2c_is_isa_client(client)) { | |
977 | down(&data->lock); | |
978 | outb_p(reg, client->addr + IT87_ADDR_REG_OFFSET); | |
979 | outb_p(value, client->addr + IT87_DATA_REG_OFFSET); | |
980 | up(&data->lock); | |
981 | return 0; | |
982 | } else | |
983 | return i2c_smbus_write_byte_data(client, reg, value); | |
984 | } | |
985 | ||
986 | /* Return 1 if and only if the PWM interface is safe to use */ | |
987 | static int it87_check_pwm(struct i2c_client *client) | |
988 | { | |
989 | /* Some BIOSes fail to correctly configure the IT87 fans. All fans off | |
990 | * and polarity set to active low is sign that this is the case so we | |
991 | * disable pwm control to protect the user. */ | |
992 | int tmp = it87_read_value(client, IT87_REG_FAN_CTL); | |
993 | if ((tmp & 0x87) == 0) { | |
994 | if (fix_pwm_polarity) { | |
995 | /* The user asks us to attempt a chip reconfiguration. | |
996 | * This means switching to active high polarity and | |
997 | * inverting all fan speed values. */ | |
998 | int i; | |
999 | u8 pwm[3]; | |
1000 | ||
1001 | for (i = 0; i < 3; i++) | |
1002 | pwm[i] = it87_read_value(client, | |
1003 | IT87_REG_PWM(i)); | |
1004 | ||
1005 | /* If any fan is in automatic pwm mode, the polarity | |
1006 | * might be correct, as suspicious as it seems, so we | |
1007 | * better don't change anything (but still disable the | |
1008 | * PWM interface). */ | |
1009 | if (!((pwm[0] | pwm[1] | pwm[2]) & 0x80)) { | |
1010 | dev_info(&client->dev, "Reconfiguring PWM to " | |
1011 | "active high polarity\n"); | |
1012 | it87_write_value(client, IT87_REG_FAN_CTL, | |
1013 | tmp | 0x87); | |
1014 | for (i = 0; i < 3; i++) | |
1015 | it87_write_value(client, | |
1016 | IT87_REG_PWM(i), | |
1017 | 0x7f & ~pwm[i]); | |
1018 | return 1; | |
1019 | } | |
1020 | ||
1021 | dev_info(&client->dev, "PWM configuration is " | |
1022 | "too broken to be fixed\n"); | |
1023 | } | |
1024 | ||
1025 | dev_info(&client->dev, "Detected broken BIOS " | |
1026 | "defaults, disabling PWM interface\n"); | |
1027 | return 0; | |
1028 | } else if (fix_pwm_polarity) { | |
1029 | dev_info(&client->dev, "PWM configuration looks " | |
1030 | "sane, won't touch\n"); | |
1031 | } | |
1032 | ||
1033 | return 1; | |
1034 | } | |
1035 | ||
1036 | /* Called when we have found a new IT87. */ | |
1037 | static void it87_init_client(struct i2c_client *client, struct it87_data *data) | |
1038 | { | |
1039 | int tmp, i; | |
1040 | ||
1041 | /* initialize to sane defaults: | |
1042 | * - if the chip is in manual pwm mode, this will be overwritten with | |
1043 | * the actual settings on the chip (so in this case, initialization | |
1044 | * is not needed) | |
1045 | * - if in automatic or on/off mode, we could switch to manual mode, | |
1046 | * read the registers and set manual_pwm_ctl accordingly, but currently | |
1047 | * this is not implemented, so we initialize to something sane */ | |
1048 | for (i = 0; i < 3; i++) { | |
1049 | data->manual_pwm_ctl[i] = 0xff; | |
1050 | } | |
1051 | ||
1052 | /* Check if temperature channnels are reset manually or by some reason */ | |
1053 | tmp = it87_read_value(client, IT87_REG_TEMP_ENABLE); | |
1054 | if ((tmp & 0x3f) == 0) { | |
1055 | /* Temp1,Temp3=thermistor; Temp2=thermal diode */ | |
1056 | tmp = (tmp & 0xc0) | 0x2a; | |
1057 | it87_write_value(client, IT87_REG_TEMP_ENABLE, tmp); | |
1058 | } | |
1059 | data->sensor = tmp; | |
1060 | ||
1061 | /* Check if voltage monitors are reset manually or by some reason */ | |
1062 | tmp = it87_read_value(client, IT87_REG_VIN_ENABLE); | |
1063 | if ((tmp & 0xff) == 0) { | |
1064 | /* Enable all voltage monitors */ | |
1065 | it87_write_value(client, IT87_REG_VIN_ENABLE, 0xff); | |
1066 | } | |
1067 | ||
1068 | /* Check if tachometers are reset manually or by some reason */ | |
1069 | data->fan_main_ctrl = it87_read_value(client, IT87_REG_FAN_MAIN_CTRL); | |
1070 | if ((data->fan_main_ctrl & 0x70) == 0) { | |
1071 | /* Enable all fan tachometers */ | |
1072 | data->fan_main_ctrl |= 0x70; | |
1073 | it87_write_value(client, IT87_REG_FAN_MAIN_CTRL, data->fan_main_ctrl); | |
1074 | } | |
1075 | ||
1076 | /* Set current fan mode registers and the default settings for the | |
1077 | * other mode registers */ | |
1078 | for (i = 0; i < 3; i++) { | |
1079 | if (data->fan_main_ctrl & (1 << i)) { | |
1080 | /* pwm mode */ | |
1081 | tmp = it87_read_value(client, IT87_REG_PWM(i)); | |
1082 | if (tmp & 0x80) { | |
1083 | /* automatic pwm - not yet implemented, but | |
1084 | * leave the settings made by the BIOS alone | |
1085 | * until a change is requested via the sysfs | |
1086 | * interface */ | |
1087 | } else { | |
1088 | /* manual pwm */ | |
1089 | data->manual_pwm_ctl[i] = PWM_FROM_REG(tmp); | |
1090 | } | |
1091 | } | |
1092 | } | |
1093 | ||
1094 | /* Start monitoring */ | |
1095 | it87_write_value(client, IT87_REG_CONFIG, | |
1096 | (it87_read_value(client, IT87_REG_CONFIG) & 0x36) | |
1097 | | (update_vbat ? 0x41 : 0x01)); | |
1098 | } | |
1099 | ||
1100 | static struct it87_data *it87_update_device(struct device *dev) | |
1101 | { | |
1102 | struct i2c_client *client = to_i2c_client(dev); | |
1103 | struct it87_data *data = i2c_get_clientdata(client); | |
1104 | int i; | |
1105 | ||
1106 | down(&data->update_lock); | |
1107 | ||
1108 | if (time_after(jiffies, data->last_updated + HZ + HZ / 2) | |
1109 | || !data->valid) { | |
1110 | ||
1111 | if (update_vbat) { | |
1112 | /* Cleared after each update, so reenable. Value | |
1113 | returned by this read will be previous value */ | |
1114 | it87_write_value(client, IT87_REG_CONFIG, | |
1115 | it87_read_value(client, IT87_REG_CONFIG) | 0x40); | |
1116 | } | |
1117 | for (i = 0; i <= 7; i++) { | |
1118 | data->in[i] = | |
1119 | it87_read_value(client, IT87_REG_VIN(i)); | |
1120 | data->in_min[i] = | |
1121 | it87_read_value(client, IT87_REG_VIN_MIN(i)); | |
1122 | data->in_max[i] = | |
1123 | it87_read_value(client, IT87_REG_VIN_MAX(i)); | |
1124 | } | |
1125 | data->in[8] = | |
1126 | it87_read_value(client, IT87_REG_VIN(8)); | |
1127 | /* Temperature sensor doesn't have limit registers, set | |
1128 | to min and max value */ | |
1129 | data->in_min[8] = 0; | |
1130 | data->in_max[8] = 255; | |
1131 | ||
1132 | for (i = 0; i < 3; i++) { | |
1133 | data->fan[i] = | |
1134 | it87_read_value(client, IT87_REG_FAN(i)); | |
1135 | data->fan_min[i] = | |
1136 | it87_read_value(client, IT87_REG_FAN_MIN(i)); | |
1137 | } | |
1138 | for (i = 0; i < 3; i++) { | |
1139 | data->temp[i] = | |
1140 | it87_read_value(client, IT87_REG_TEMP(i)); | |
1141 | data->temp_high[i] = | |
1142 | it87_read_value(client, IT87_REG_TEMP_HIGH(i)); | |
1143 | data->temp_low[i] = | |
1144 | it87_read_value(client, IT87_REG_TEMP_LOW(i)); | |
1145 | } | |
1146 | ||
1147 | i = it87_read_value(client, IT87_REG_FAN_DIV); | |
1148 | data->fan_div[0] = i & 0x07; | |
1149 | data->fan_div[1] = (i >> 3) & 0x07; | |
1150 | data->fan_div[2] = (i & 0x40) ? 3 : 1; | |
1151 | ||
1152 | data->alarms = | |
1153 | it87_read_value(client, IT87_REG_ALARM1) | | |
1154 | (it87_read_value(client, IT87_REG_ALARM2) << 8) | | |
1155 | (it87_read_value(client, IT87_REG_ALARM3) << 16); | |
1156 | data->fan_main_ctrl = it87_read_value(client, IT87_REG_FAN_MAIN_CTRL); | |
1157 | ||
1158 | data->sensor = it87_read_value(client, IT87_REG_TEMP_ENABLE); | |
1159 | /* The 8705 does not have VID capability */ | |
1160 | if (data->type == it8712) { | |
1161 | data->vid = it87_read_value(client, IT87_REG_VID); | |
1162 | data->vid &= 0x1f; | |
1163 | } | |
1164 | data->last_updated = jiffies; | |
1165 | data->valid = 1; | |
1166 | } | |
1167 | ||
1168 | up(&data->update_lock); | |
1169 | ||
1170 | return data; | |
1171 | } | |
1172 | ||
1173 | static int __init sm_it87_init(void) | |
1174 | { | |
1175 | int addr; | |
1176 | ||
1177 | if (!it87_find(&addr)) { | |
1178 | normal_isa[0] = addr; | |
1179 | } | |
1180 | return i2c_add_driver(&it87_driver); | |
1181 | } | |
1182 | ||
1183 | static void __exit sm_it87_exit(void) | |
1184 | { | |
1185 | i2c_del_driver(&it87_driver); | |
1186 | } | |
1187 | ||
1188 | ||
1189 | MODULE_AUTHOR("Chris Gauthron <chrisg@0-in.com>"); | |
1190 | MODULE_DESCRIPTION("IT8705F, IT8712F, Sis950 driver"); | |
1191 | module_param(update_vbat, bool, 0); | |
1192 | MODULE_PARM_DESC(update_vbat, "Update vbat if set else return powerup value"); | |
1193 | module_param(fix_pwm_polarity, bool, 0); | |
1194 | MODULE_PARM_DESC(fix_pwm_polarity, "Force PWM polarity to active high (DANGEROUS)"); | |
1195 | MODULE_LICENSE("GPL"); | |
1196 | ||
1197 | module_init(sm_it87_init); | |
1198 | module_exit(sm_it87_exit); |