2 vt8231.c - Part of lm_sensors, Linux kernel modules
3 for hardware monitoring
5 Copyright (c) 2005 Roger Lucas <roger@planbit.co.uk>
6 Copyright (c) 2002 Mark D. Studebaker <mdsxyz123@yahoo.com>
7 Aaron M. Marsh <amarsh@sdf.lonestar.org>
9 This program is free software; you can redistribute it and/or modify
10 it under the terms of the GNU General Public License as published by
11 the Free Software Foundation; either version 2 of the License, or
12 (at your option) any later version.
14 This program is distributed in the hope that it will be useful,
15 but WITHOUT ANY WARRANTY; without even the implied warranty of
16 MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
17 GNU General Public License for more details.
19 You should have received a copy of the GNU General Public License
20 along with this program; if not, write to the Free Software
21 Foundation, Inc., 675 Mass Ave, Cambridge, MA 02139, USA.
24 /* Supports VIA VT8231 South Bridge embedded sensors
27 #include <linux/module.h>
28 #include <linux/init.h>
29 #include <linux/slab.h>
30 #include <linux/pci.h>
31 #include <linux/jiffies.h>
32 #include <linux/i2c.h>
33 #include <linux/i2c-isa.h>
34 #include <linux/hwmon.h>
35 #include <linux/hwmon-sysfs.h>
36 #include <linux/hwmon-vid.h>
37 #include <linux/err.h>
38 #include <linux/mutex.h>
41 static int force_addr
;
42 module_param(force_addr
, int, 0);
43 MODULE_PARM_DESC(force_addr
, "Initialize the base address of the sensors");
46 Note that we can't determine the ISA address until we have initialized
48 static unsigned short isa_address
;
50 #define VT8231_EXTENT 0x80
51 #define VT8231_BASE_REG 0x70
52 #define VT8231_ENABLE_REG 0x74
54 /* The VT8231 registers
56 The reset value for the input channel configuration is used (Reg 0x4A=0x07)
57 which sets the selected inputs marked with '*' below if multiple options are
60 Voltage Mode Temperature Mode
61 Sensor Linux Id Linux Id VIA Id
62 -------- -------- -------- ------
71 Note that the BIOS may set the configuration register to a different value
72 to match the motherboard configuration.
75 /* fans numbered 0-1 */
76 #define VT8231_REG_FAN_MIN(nr) (0x3b + (nr))
77 #define VT8231_REG_FAN(nr) (0x29 + (nr))
79 /* Voltage inputs numbered 0-5 */
81 static const u8 regvolt
[] = { 0x21, 0x22, 0x23, 0x24, 0x25, 0x26 };
82 static const u8 regvoltmax
[] = { 0x3d, 0x2b, 0x2d, 0x2f, 0x31, 0x33 };
83 static const u8 regvoltmin
[] = { 0x3e, 0x2c, 0x2e, 0x30, 0x32, 0x34 };
85 /* Temperatures are numbered 1-6 according to the Linux kernel specification.
87 ** In the VIA datasheet, however, the temperatures are numbered from zero.
88 ** Since it is important that this driver can easily be compared to the VIA
89 ** datasheet, we will use the VIA numbering within this driver and map the
90 ** kernel sysfs device name to the VIA number in the sysfs callback.
93 #define VT8231_REG_TEMP_LOW01 0x49
94 #define VT8231_REG_TEMP_LOW25 0x4d
96 static const u8 regtemp
[] = { 0x1f, 0x21, 0x22, 0x23, 0x24, 0x25 };
97 static const u8 regtempmax
[] = { 0x39, 0x3d, 0x2b, 0x2d, 0x2f, 0x31 };
98 static const u8 regtempmin
[] = { 0x3a, 0x3e, 0x2c, 0x2e, 0x30, 0x32 };
100 #define TEMP_FROM_REG(reg) (((253 * 4 - (reg)) * 550 + 105) / 210)
101 #define TEMP_MAXMIN_FROM_REG(reg) (((253 - (reg)) * 2200 + 105) / 210)
102 #define TEMP_MAXMIN_TO_REG(val) (253 - ((val) * 210 + 1100) / 2200)
104 #define VT8231_REG_CONFIG 0x40
105 #define VT8231_REG_ALARM1 0x41
106 #define VT8231_REG_ALARM2 0x42
107 #define VT8231_REG_FANDIV 0x47
108 #define VT8231_REG_UCH_CONFIG 0x4a
109 #define VT8231_REG_TEMP1_CONFIG 0x4b
110 #define VT8231_REG_TEMP2_CONFIG 0x4c
112 /* temps 0-5 as numbered in VIA datasheet - see later for mapping to Linux
115 #define ISTEMP(i, ch_config) ((i) == 0 ? 1 : \
116 ((ch_config) >> ((i)+1)) & 0x01)
118 #define ISVOLT(i, ch_config) ((i) == 5 ? 1 : \
119 !(((ch_config) >> ((i)+2)) & 0x01))
121 #define DIV_FROM_REG(val) (1 << (val))
123 /* NB The values returned here are NOT temperatures. The calibration curves
124 ** for the thermistor curves are board-specific and must go in the
125 ** sensors.conf file. Temperature sensors are actually ten bits, but the
126 ** VIA datasheet only considers the 8 MSBs obtained from the regtemp[]
127 ** register. The temperature value returned should have a magnitude of 3,
128 ** so we use the VIA scaling as the "true" scaling and use the remaining 2
129 ** LSBs as fractional precision.
131 ** All the on-chip hardware temperature comparisons for the alarms are only
132 ** 8-bits wide, and compare against the 8 MSBs of the temperature. The bits
133 ** in the registers VT8231_REG_TEMP_LOW01 and VT8231_REG_TEMP_LOW25 are
137 /******** FAN RPM CONVERSIONS ********
138 ** This chip saturates back at 0, not at 255 like many the other chips.
141 static inline u8
FAN_TO_REG(long rpm
, int div
)
145 return SENSORS_LIMIT(1310720 / (rpm
* div
), 1, 255);
148 #define FAN_FROM_REG(val, div) ((val) == 0 ? 0 : 1310720 / ((val) * (div)))
151 struct i2c_client client
;
152 struct mutex update_lock
;
153 struct class_device
*class_dev
;
154 char valid
; /* !=0 if following fields are valid */
155 unsigned long last_updated
; /* In jiffies */
157 u8 in
[6]; /* Register value */
158 u8 in_max
[6]; /* Register value */
159 u8 in_min
[6]; /* Register value */
160 u16 temp
[6]; /* Register value 10 bit, right aligned */
161 u8 temp_max
[6]; /* Register value */
162 u8 temp_min
[6]; /* Register value */
163 u8 fan
[2]; /* Register value */
164 u8 fan_min
[2]; /* Register value */
165 u8 fan_div
[2]; /* Register encoding, shifted right */
166 u16 alarms
; /* Register encoding */
170 static struct pci_dev
*s_bridge
;
171 static int vt8231_detect(struct i2c_adapter
*adapter
);
172 static int vt8231_detach_client(struct i2c_client
*client
);
173 static struct vt8231_data
*vt8231_update_device(struct device
*dev
);
174 static void vt8231_init_client(struct i2c_client
*client
);
176 static inline int vt8231_read_value(struct i2c_client
*client
, u8 reg
)
178 return inb_p(client
->addr
+ reg
);
181 static inline void vt8231_write_value(struct i2c_client
*client
, u8 reg
,
184 outb_p(value
, client
->addr
+ reg
);
187 /* following are the sysfs callback functions */
188 static ssize_t
show_in(struct device
*dev
, struct device_attribute
*attr
,
191 struct sensor_device_attribute
*sensor_attr
= to_sensor_dev_attr(attr
);
192 int nr
= sensor_attr
->index
;
193 struct vt8231_data
*data
= vt8231_update_device(dev
);
195 return sprintf(buf
, "%d\n", ((data
->in
[nr
] - 3) * 10000) / 958);
198 static ssize_t
show_in_min(struct device
*dev
, struct device_attribute
*attr
,
201 struct sensor_device_attribute
*sensor_attr
= to_sensor_dev_attr(attr
);
202 int nr
= sensor_attr
->index
;
203 struct vt8231_data
*data
= vt8231_update_device(dev
);
205 return sprintf(buf
, "%d\n", ((data
->in_min
[nr
] - 3) * 10000) / 958);
208 static ssize_t
show_in_max(struct device
*dev
, struct device_attribute
*attr
,
211 struct sensor_device_attribute
*sensor_attr
= to_sensor_dev_attr(attr
);
212 int nr
= sensor_attr
->index
;
213 struct vt8231_data
*data
= vt8231_update_device(dev
);
215 return sprintf(buf
, "%d\n", (((data
->in_max
[nr
] - 3) * 10000) / 958));
218 static ssize_t
set_in_min(struct device
*dev
, struct device_attribute
*attr
,
219 const char *buf
, size_t count
)
221 struct sensor_device_attribute
*sensor_attr
= to_sensor_dev_attr(attr
);
222 int nr
= sensor_attr
->index
;
223 struct i2c_client
*client
= to_i2c_client(dev
);
224 struct vt8231_data
*data
= i2c_get_clientdata(client
);
225 unsigned long val
= simple_strtoul(buf
, NULL
, 10);
227 mutex_lock(&data
->update_lock
);
228 data
->in_min
[nr
] = SENSORS_LIMIT(((val
* 958) / 10000) + 3, 0, 255);
229 vt8231_write_value(client
, regvoltmin
[nr
], data
->in_min
[nr
]);
230 mutex_unlock(&data
->update_lock
);
234 static ssize_t
set_in_max(struct device
*dev
, struct device_attribute
*attr
,
235 const char *buf
, size_t count
)
237 struct sensor_device_attribute
*sensor_attr
= to_sensor_dev_attr(attr
);
238 int nr
= sensor_attr
->index
;
239 struct i2c_client
*client
= to_i2c_client(dev
);
240 struct vt8231_data
*data
= i2c_get_clientdata(client
);
241 unsigned long val
= simple_strtoul(buf
, NULL
, 10);
243 mutex_lock(&data
->update_lock
);
244 data
->in_max
[nr
] = SENSORS_LIMIT(((val
* 958) / 10000) + 3, 0, 255);
245 vt8231_write_value(client
, regvoltmax
[nr
], data
->in_max
[nr
]);
246 mutex_unlock(&data
->update_lock
);
250 /* Special case for input 5 as this has 3.3V scaling built into the chip */
251 static ssize_t
show_in5(struct device
*dev
, struct device_attribute
*attr
,
254 struct vt8231_data
*data
= vt8231_update_device(dev
);
256 return sprintf(buf
, "%d\n",
257 (((data
->in
[5] - 3) * 10000 * 54) / (958 * 34)));
260 static ssize_t
show_in5_min(struct device
*dev
, struct device_attribute
*attr
,
263 struct vt8231_data
*data
= vt8231_update_device(dev
);
265 return sprintf(buf
, "%d\n",
266 (((data
->in_min
[5] - 3) * 10000 * 54) / (958 * 34)));
269 static ssize_t
show_in5_max(struct device
*dev
, struct device_attribute
*attr
,
272 struct vt8231_data
*data
= vt8231_update_device(dev
);
274 return sprintf(buf
, "%d\n",
275 (((data
->in_max
[5] - 3) * 10000 * 54) / (958 * 34)));
278 static ssize_t
set_in5_min(struct device
*dev
, struct device_attribute
*attr
,
279 const char *buf
, size_t count
)
281 struct i2c_client
*client
= to_i2c_client(dev
);
282 struct vt8231_data
*data
= i2c_get_clientdata(client
);
283 unsigned long val
= simple_strtoul(buf
, NULL
, 10);
285 mutex_lock(&data
->update_lock
);
286 data
->in_min
[5] = SENSORS_LIMIT(((val
* 958 * 34) / (10000 * 54)) + 3,
288 vt8231_write_value(client
, regvoltmin
[5], data
->in_min
[5]);
289 mutex_unlock(&data
->update_lock
);
293 static ssize_t
set_in5_max(struct device
*dev
, struct device_attribute
*attr
,
294 const char *buf
, size_t count
)
296 struct i2c_client
*client
= to_i2c_client(dev
);
297 struct vt8231_data
*data
= i2c_get_clientdata(client
);
298 unsigned long val
= simple_strtoul(buf
, NULL
, 10);
300 mutex_lock(&data
->update_lock
);
301 data
->in_max
[5] = SENSORS_LIMIT(((val
* 958 * 34) / (10000 * 54)) + 3,
303 vt8231_write_value(client
, regvoltmax
[5], data
->in_max
[5]);
304 mutex_unlock(&data
->update_lock
);
308 #define define_voltage_sysfs(offset) \
309 static SENSOR_DEVICE_ATTR(in##offset##_input, S_IRUGO, \
310 show_in, NULL, offset); \
311 static SENSOR_DEVICE_ATTR(in##offset##_min, S_IRUGO | S_IWUSR, \
312 show_in_min, set_in_min, offset); \
313 static SENSOR_DEVICE_ATTR(in##offset##_max, S_IRUGO | S_IWUSR, \
314 show_in_max, set_in_max, offset)
316 define_voltage_sysfs(0);
317 define_voltage_sysfs(1);
318 define_voltage_sysfs(2);
319 define_voltage_sysfs(3);
320 define_voltage_sysfs(4);
322 static DEVICE_ATTR(in5_input
, S_IRUGO
, show_in5
, NULL
);
323 static DEVICE_ATTR(in5_min
, S_IRUGO
| S_IWUSR
, show_in5_min
, set_in5_min
);
324 static DEVICE_ATTR(in5_max
, S_IRUGO
| S_IWUSR
, show_in5_max
, set_in5_max
);
327 static ssize_t
show_temp0(struct device
*dev
, struct device_attribute
*attr
,
330 struct vt8231_data
*data
= vt8231_update_device(dev
);
331 return sprintf(buf
, "%d\n", data
->temp
[0] * 250);
334 static ssize_t
show_temp0_max(struct device
*dev
, struct device_attribute
*attr
,
337 struct vt8231_data
*data
= vt8231_update_device(dev
);
338 return sprintf(buf
, "%d\n", data
->temp_max
[0] * 1000);
341 static ssize_t
show_temp0_min(struct device
*dev
, struct device_attribute
*attr
,
344 struct vt8231_data
*data
= vt8231_update_device(dev
);
345 return sprintf(buf
, "%d\n", data
->temp_min
[0] * 1000);
348 static ssize_t
set_temp0_max(struct device
*dev
, struct device_attribute
*attr
,
349 const char *buf
, size_t count
)
351 struct i2c_client
*client
= to_i2c_client(dev
);
352 struct vt8231_data
*data
= i2c_get_clientdata(client
);
353 int val
= simple_strtol(buf
, NULL
, 10);
355 mutex_lock(&data
->update_lock
);
356 data
->temp_max
[0] = SENSORS_LIMIT((val
+ 500) / 1000, 0, 255);
357 vt8231_write_value(client
, regtempmax
[0], data
->temp_max
[0]);
358 mutex_unlock(&data
->update_lock
);
361 static ssize_t
set_temp0_min(struct device
*dev
, struct device_attribute
*attr
,
362 const char *buf
, size_t count
)
364 struct i2c_client
*client
= to_i2c_client(dev
);
365 struct vt8231_data
*data
= i2c_get_clientdata(client
);
366 int val
= simple_strtol(buf
, NULL
, 10);
368 mutex_lock(&data
->update_lock
);
369 data
->temp_min
[0] = SENSORS_LIMIT((val
+ 500) / 1000, 0, 255);
370 vt8231_write_value(client
, regtempmin
[0], data
->temp_min
[0]);
371 mutex_unlock(&data
->update_lock
);
375 static ssize_t
show_temp(struct device
*dev
, struct device_attribute
*attr
,
378 struct sensor_device_attribute
*sensor_attr
= to_sensor_dev_attr(attr
);
379 int nr
= sensor_attr
->index
;
380 struct vt8231_data
*data
= vt8231_update_device(dev
);
381 return sprintf(buf
, "%d\n", TEMP_FROM_REG(data
->temp
[nr
]));
384 static ssize_t
show_temp_max(struct device
*dev
, struct device_attribute
*attr
,
387 struct sensor_device_attribute
*sensor_attr
= to_sensor_dev_attr(attr
);
388 int nr
= sensor_attr
->index
;
389 struct vt8231_data
*data
= vt8231_update_device(dev
);
390 return sprintf(buf
, "%d\n", TEMP_MAXMIN_FROM_REG(data
->temp_max
[nr
]));
393 static ssize_t
show_temp_min(struct device
*dev
, struct device_attribute
*attr
,
396 struct sensor_device_attribute
*sensor_attr
= to_sensor_dev_attr(attr
);
397 int nr
= sensor_attr
->index
;
398 struct vt8231_data
*data
= vt8231_update_device(dev
);
399 return sprintf(buf
, "%d\n", TEMP_MAXMIN_FROM_REG(data
->temp_min
[nr
]));
402 static ssize_t
set_temp_max(struct device
*dev
, struct device_attribute
*attr
,
403 const char *buf
, size_t count
)
405 struct sensor_device_attribute
*sensor_attr
= to_sensor_dev_attr(attr
);
406 int nr
= sensor_attr
->index
;
407 struct i2c_client
*client
= to_i2c_client(dev
);
408 struct vt8231_data
*data
= i2c_get_clientdata(client
);
409 int val
= simple_strtol(buf
, NULL
, 10);
411 mutex_lock(&data
->update_lock
);
412 data
->temp_max
[nr
] = SENSORS_LIMIT(TEMP_MAXMIN_TO_REG(val
), 0, 255);
413 vt8231_write_value(client
, regtempmax
[nr
], data
->temp_max
[nr
]);
414 mutex_unlock(&data
->update_lock
);
417 static ssize_t
set_temp_min(struct device
*dev
, struct device_attribute
*attr
,
418 const char *buf
, size_t count
)
420 struct sensor_device_attribute
*sensor_attr
= to_sensor_dev_attr(attr
);
421 int nr
= sensor_attr
->index
;
422 struct i2c_client
*client
= to_i2c_client(dev
);
423 struct vt8231_data
*data
= i2c_get_clientdata(client
);
424 int val
= simple_strtol(buf
, NULL
, 10);
426 mutex_lock(&data
->update_lock
);
427 data
->temp_min
[nr
] = SENSORS_LIMIT(TEMP_MAXMIN_TO_REG(val
), 0, 255);
428 vt8231_write_value(client
, regtempmin
[nr
], data
->temp_min
[nr
]);
429 mutex_unlock(&data
->update_lock
);
433 /* Note that these map the Linux temperature sensor numbering (1-6) to the VIA
434 ** temperature sensor numbering (0-5)
436 #define define_temperature_sysfs(offset) \
437 static SENSOR_DEVICE_ATTR(temp##offset##_input, S_IRUGO, \
438 show_temp, NULL, offset - 1); \
439 static SENSOR_DEVICE_ATTR(temp##offset##_max, S_IRUGO | S_IWUSR, \
440 show_temp_max, set_temp_max, offset - 1); \
441 static SENSOR_DEVICE_ATTR(temp##offset##_max_hyst, S_IRUGO | S_IWUSR, \
442 show_temp_min, set_temp_min, offset - 1)
444 static DEVICE_ATTR(temp1_input
, S_IRUGO
, show_temp0
, NULL
);
445 static DEVICE_ATTR(temp1_max
, S_IRUGO
| S_IWUSR
, show_temp0_max
, set_temp0_max
);
446 static DEVICE_ATTR(temp1_max_hyst
, S_IRUGO
| S_IWUSR
, show_temp0_min
, set_temp0_min
);
448 define_temperature_sysfs(2);
449 define_temperature_sysfs(3);
450 define_temperature_sysfs(4);
451 define_temperature_sysfs(5);
452 define_temperature_sysfs(6);
454 #define CFG_INFO_TEMP(id) { &sensor_dev_attr_temp##id##_input.dev_attr, \
455 &sensor_dev_attr_temp##id##_max_hyst.dev_attr, \
456 &sensor_dev_attr_temp##id##_max.dev_attr }
457 #define CFG_INFO_VOLT(id) { &sensor_dev_attr_in##id##_input.dev_attr, \
458 &sensor_dev_attr_in##id##_min.dev_attr, \
459 &sensor_dev_attr_in##id##_max.dev_attr }
461 struct str_device_attr_table
{
462 struct device_attribute
*input
;
463 struct device_attribute
*min
;
464 struct device_attribute
*max
;
467 static struct str_device_attr_table cfg_info_temp
[] = {
468 { &dev_attr_temp1_input
, &dev_attr_temp1_max_hyst
, &dev_attr_temp1_max
},
476 static struct str_device_attr_table cfg_info_volt
[] = {
482 { &dev_attr_in5_input
, &dev_attr_in5_min
, &dev_attr_in5_max
}
486 static ssize_t
show_fan(struct device
*dev
, struct device_attribute
*attr
,
489 struct sensor_device_attribute
*sensor_attr
= to_sensor_dev_attr(attr
);
490 int nr
= sensor_attr
->index
;
491 struct vt8231_data
*data
= vt8231_update_device(dev
);
492 return sprintf(buf
, "%d\n", FAN_FROM_REG(data
->fan
[nr
],
493 DIV_FROM_REG(data
->fan_div
[nr
])));
496 static ssize_t
show_fan_min(struct device
*dev
, struct device_attribute
*attr
,
499 struct sensor_device_attribute
*sensor_attr
= to_sensor_dev_attr(attr
);
500 int nr
= sensor_attr
->index
;
501 struct vt8231_data
*data
= vt8231_update_device(dev
);
502 return sprintf(buf
, "%d\n", FAN_FROM_REG(data
->fan_min
[nr
],
503 DIV_FROM_REG(data
->fan_div
[nr
])));
506 static ssize_t
show_fan_div(struct device
*dev
, struct device_attribute
*attr
,
509 struct sensor_device_attribute
*sensor_attr
= to_sensor_dev_attr(attr
);
510 int nr
= sensor_attr
->index
;
511 struct vt8231_data
*data
= vt8231_update_device(dev
);
512 return sprintf(buf
, "%d\n", DIV_FROM_REG(data
->fan_div
[nr
]));
515 static ssize_t
set_fan_min(struct device
*dev
, struct device_attribute
*attr
,
516 const char *buf
, size_t count
)
518 struct sensor_device_attribute
*sensor_attr
= to_sensor_dev_attr(attr
);
519 int nr
= sensor_attr
->index
;
520 struct i2c_client
*client
= to_i2c_client(dev
);
521 struct vt8231_data
*data
= i2c_get_clientdata(client
);
522 int val
= simple_strtoul(buf
, NULL
, 10);
524 mutex_lock(&data
->update_lock
);
525 data
->fan_min
[nr
] = FAN_TO_REG(val
, DIV_FROM_REG(data
->fan_div
[nr
]));
526 vt8231_write_value(client
, VT8231_REG_FAN_MIN(nr
), data
->fan_min
[nr
]);
527 mutex_unlock(&data
->update_lock
);
531 static ssize_t
set_fan_div(struct device
*dev
, struct device_attribute
*attr
,
532 const char *buf
, size_t count
)
534 struct i2c_client
*client
= to_i2c_client(dev
);
535 struct vt8231_data
*data
= i2c_get_clientdata(client
);
536 struct sensor_device_attribute
*sensor_attr
= to_sensor_dev_attr(attr
);
537 unsigned long val
= simple_strtoul(buf
, NULL
, 10);
538 int nr
= sensor_attr
->index
;
539 int old
= vt8231_read_value(client
, VT8231_REG_FANDIV
);
540 long min
= FAN_FROM_REG(data
->fan_min
[nr
],
541 DIV_FROM_REG(data
->fan_div
[nr
]));
543 mutex_lock(&data
->update_lock
);
545 case 1: data
->fan_div
[nr
] = 0; break;
546 case 2: data
->fan_div
[nr
] = 1; break;
547 case 4: data
->fan_div
[nr
] = 2; break;
548 case 8: data
->fan_div
[nr
] = 3; break;
550 dev_err(&client
->dev
, "fan_div value %ld not supported."
551 "Choose one of 1, 2, 4 or 8!\n", val
);
552 mutex_unlock(&data
->update_lock
);
556 /* Correct the fan minimum speed */
557 data
->fan_min
[nr
] = FAN_TO_REG(min
, DIV_FROM_REG(data
->fan_div
[nr
]));
558 vt8231_write_value(client
, VT8231_REG_FAN_MIN(nr
), data
->fan_min
[nr
]);
560 old
= (old
& 0x0f) | (data
->fan_div
[1] << 6) | (data
->fan_div
[0] << 4);
561 vt8231_write_value(client
, VT8231_REG_FANDIV
, old
);
562 mutex_unlock(&data
->update_lock
);
567 #define define_fan_sysfs(offset) \
568 static SENSOR_DEVICE_ATTR(fan##offset##_input, S_IRUGO, \
569 show_fan, NULL, offset - 1); \
570 static SENSOR_DEVICE_ATTR(fan##offset##_div, S_IRUGO | S_IWUSR, \
571 show_fan_div, set_fan_div, offset - 1); \
572 static SENSOR_DEVICE_ATTR(fan##offset##_min, S_IRUGO | S_IWUSR, \
573 show_fan_min, set_fan_min, offset - 1)
579 static ssize_t
show_alarms(struct device
*dev
, struct device_attribute
*attr
,
582 struct vt8231_data
*data
= vt8231_update_device(dev
);
583 return sprintf(buf
, "%d\n", data
->alarms
);
586 static DEVICE_ATTR(alarms
, S_IRUGO
, show_alarms
, NULL
);
588 static struct i2c_driver vt8231_driver
= {
590 .owner
= THIS_MODULE
,
593 .attach_adapter
= vt8231_detect
,
594 .detach_client
= vt8231_detach_client
,
597 static struct pci_device_id vt8231_pci_ids
[] = {
598 { PCI_DEVICE(PCI_VENDOR_ID_VIA
, PCI_DEVICE_ID_VIA_8231_4
) },
602 MODULE_DEVICE_TABLE(pci
, vt8231_pci_ids
);
604 static int __devinit
vt8231_pci_probe(struct pci_dev
*dev
,
605 const struct pci_device_id
*id
);
607 static struct pci_driver vt8231_pci_driver
= {
609 .id_table
= vt8231_pci_ids
,
610 .probe
= vt8231_pci_probe
,
613 int vt8231_detect(struct i2c_adapter
*adapter
)
615 struct i2c_client
*client
;
616 struct vt8231_data
*data
;
620 /* 8231 requires multiple of 256 */
622 isa_address
= force_addr
& 0xFF00;
623 dev_warn(&adapter
->dev
, "forcing ISA address 0x%04X\n",
625 if (PCIBIOS_SUCCESSFUL
!= pci_write_config_word(s_bridge
,
626 VT8231_BASE_REG
, isa_address
))
630 if (PCIBIOS_SUCCESSFUL
!=
631 pci_read_config_word(s_bridge
, VT8231_ENABLE_REG
, &val
))
634 if (!(val
& 0x0001)) {
635 dev_warn(&adapter
->dev
, "enabling sensors\n");
636 if (PCIBIOS_SUCCESSFUL
!=
637 pci_write_config_word(s_bridge
, VT8231_ENABLE_REG
,
642 /* Reserve the ISA region */
643 if (!request_region(isa_address
, VT8231_EXTENT
,
644 vt8231_pci_driver
.name
)) {
645 dev_err(&adapter
->dev
, "region 0x%x already in use!\n",
650 if (!(data
= kzalloc(sizeof(struct vt8231_data
), GFP_KERNEL
))) {
655 client
= &data
->client
;
656 i2c_set_clientdata(client
, data
);
657 client
->addr
= isa_address
;
658 client
->adapter
= adapter
;
659 client
->driver
= &vt8231_driver
;
660 client
->dev
.parent
= &adapter
->dev
;
662 /* Fill in the remaining client fields and put into the global list */
663 strlcpy(client
->name
, "vt8231", I2C_NAME_SIZE
);
665 mutex_init(&data
->update_lock
);
667 /* Tell the I2C layer a new client has arrived */
668 if ((err
= i2c_attach_client(client
)))
671 vt8231_init_client(client
);
673 /* Register sysfs hooks */
674 data
->class_dev
= hwmon_device_register(&client
->dev
);
675 if (IS_ERR(data
->class_dev
)) {
676 err
= PTR_ERR(data
->class_dev
);
680 /* Must update device information to find out the config field */
681 data
->uch_config
= vt8231_read_value(client
, VT8231_REG_UCH_CONFIG
);
683 for (i
= 0; i
< ARRAY_SIZE(cfg_info_temp
); i
++) {
684 if (ISTEMP(i
, data
->uch_config
)) {
685 device_create_file(&client
->dev
,
686 cfg_info_temp
[i
].input
);
687 device_create_file(&client
->dev
, cfg_info_temp
[i
].max
);
688 device_create_file(&client
->dev
, cfg_info_temp
[i
].min
);
692 for (i
= 0; i
< ARRAY_SIZE(cfg_info_volt
); i
++) {
693 if (ISVOLT(i
, data
->uch_config
)) {
694 device_create_file(&client
->dev
,
695 cfg_info_volt
[i
].input
);
696 device_create_file(&client
->dev
, cfg_info_volt
[i
].max
);
697 device_create_file(&client
->dev
, cfg_info_volt
[i
].min
);
701 device_create_file(&client
->dev
, &sensor_dev_attr_fan1_input
.dev_attr
);
702 device_create_file(&client
->dev
, &sensor_dev_attr_fan2_input
.dev_attr
);
703 device_create_file(&client
->dev
, &sensor_dev_attr_fan1_min
.dev_attr
);
704 device_create_file(&client
->dev
, &sensor_dev_attr_fan2_min
.dev_attr
);
705 device_create_file(&client
->dev
, &sensor_dev_attr_fan1_div
.dev_attr
);
706 device_create_file(&client
->dev
, &sensor_dev_attr_fan2_div
.dev_attr
);
708 device_create_file(&client
->dev
, &dev_attr_alarms
);
712 i2c_detach_client(client
);
716 release_region(isa_address
, VT8231_EXTENT
);
720 static int vt8231_detach_client(struct i2c_client
*client
)
722 struct vt8231_data
*data
= i2c_get_clientdata(client
);
725 hwmon_device_unregister(data
->class_dev
);
727 if ((err
= i2c_detach_client(client
))) {
731 release_region(client
->addr
, VT8231_EXTENT
);
737 static void vt8231_init_client(struct i2c_client
*client
)
739 vt8231_write_value(client
, VT8231_REG_TEMP1_CONFIG
, 0);
740 vt8231_write_value(client
, VT8231_REG_TEMP2_CONFIG
, 0);
743 static struct vt8231_data
*vt8231_update_device(struct device
*dev
)
745 struct i2c_client
*client
= to_i2c_client(dev
);
746 struct vt8231_data
*data
= i2c_get_clientdata(client
);
750 mutex_lock(&data
->update_lock
);
752 if (time_after(jiffies
, data
->last_updated
+ HZ
+ HZ
/ 2)
754 for (i
= 0; i
< 6; i
++) {
755 if (ISVOLT(i
, data
->uch_config
)) {
756 data
->in
[i
] = vt8231_read_value(client
,
758 data
->in_min
[i
] = vt8231_read_value(client
,
760 data
->in_max
[i
] = vt8231_read_value(client
,
764 for (i
= 0; i
< 2; i
++) {
765 data
->fan
[i
] = vt8231_read_value(client
,
767 data
->fan_min
[i
] = vt8231_read_value(client
,
768 VT8231_REG_FAN_MIN(i
));
771 low
= vt8231_read_value(client
, VT8231_REG_TEMP_LOW01
);
772 low
= (low
>> 6) | ((low
& 0x30) >> 2)
773 | (vt8231_read_value(client
, VT8231_REG_TEMP_LOW25
) << 4);
774 for (i
= 0; i
< 6; i
++) {
775 if (ISTEMP(i
, data
->uch_config
)) {
776 data
->temp
[i
] = (vt8231_read_value(client
,
778 | ((low
>> (2 * i
)) & 0x03);
779 data
->temp_max
[i
] = vt8231_read_value(client
,
781 data
->temp_min
[i
] = vt8231_read_value(client
,
786 i
= vt8231_read_value(client
, VT8231_REG_FANDIV
);
787 data
->fan_div
[0] = (i
>> 4) & 0x03;
788 data
->fan_div
[1] = i
>> 6;
789 data
->alarms
= vt8231_read_value(client
, VT8231_REG_ALARM1
) |
790 (vt8231_read_value(client
, VT8231_REG_ALARM2
) << 8);
792 /* Set alarm flags correctly */
793 if (!data
->fan
[0] && data
->fan_min
[0]) {
794 data
->alarms
|= 0x40;
795 } else if (data
->fan
[0] && !data
->fan_min
[0]) {
796 data
->alarms
&= ~0x40;
799 if (!data
->fan
[1] && data
->fan_min
[1]) {
800 data
->alarms
|= 0x80;
801 } else if (data
->fan
[1] && !data
->fan_min
[1]) {
802 data
->alarms
&= ~0x80;
805 data
->last_updated
= jiffies
;
809 mutex_unlock(&data
->update_lock
);
814 static int __devinit
vt8231_pci_probe(struct pci_dev
*dev
,
815 const struct pci_device_id
*id
)
819 if (PCIBIOS_SUCCESSFUL
!= pci_read_config_word(dev
, VT8231_BASE_REG
,
823 isa_address
= val
& ~(VT8231_EXTENT
- 1);
824 if (isa_address
== 0 && force_addr
== 0) {
825 dev_err(&dev
->dev
, "base address not set -\
826 upgrade BIOS or use force_addr=0xaddr\n");
830 s_bridge
= pci_dev_get(dev
);
832 if (i2c_isa_add_driver(&vt8231_driver
)) {
833 pci_dev_put(s_bridge
);
837 /* Always return failure here. This is to allow other drivers to bind
838 * to this pci device. We don't really want to have control over the
839 * pci device, we only wanted to read as few register values from it.
844 static int __init
sm_vt8231_init(void)
846 return pci_register_driver(&vt8231_pci_driver
);
849 static void __exit
sm_vt8231_exit(void)
851 pci_unregister_driver(&vt8231_pci_driver
);
852 if (s_bridge
!= NULL
) {
853 i2c_isa_del_driver(&vt8231_driver
);
854 pci_dev_put(s_bridge
);
859 MODULE_AUTHOR("Roger Lucas <roger@planbit.co.uk>");
860 MODULE_DESCRIPTION("VT8231 sensors");
861 MODULE_LICENSE("GPL");
863 module_init(sm_vt8231_init
);
864 module_exit(sm_vt8231_exit
);