2 * vt8231.c - Part of lm_sensors, Linux kernel modules
3 * for hardware monitoring
5 * Copyright (c) 2005 Roger Lucas <vt8231@hiddenengine.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.
25 * Supports VIA VT8231 South Bridge embedded sensors
28 #define pr_fmt(fmt) KBUILD_MODNAME ": " fmt
30 #include <linux/module.h>
31 #include <linux/init.h>
32 #include <linux/slab.h>
33 #include <linux/pci.h>
34 #include <linux/jiffies.h>
35 #include <linux/platform_device.h>
36 #include <linux/hwmon.h>
37 #include <linux/hwmon-sysfs.h>
38 #include <linux/hwmon-vid.h>
39 #include <linux/err.h>
40 #include <linux/mutex.h>
41 #include <linux/acpi.h>
44 static int force_addr;
45 module_param(force_addr, int, 0);
46 MODULE_PARM_DESC(force_addr, "Initialize the base address of the sensors");
48 static struct platform_device *pdev;
50 #define VT8231_EXTENT 0x80
51 #define VT8231_BASE_REG 0x70
52 #define VT8231_ENABLE_REG 0x74
55 * The VT8231 registers
57 * The reset value for the input channel configuration is used (Reg 0x4A=0x07)
58 * which sets the selected inputs marked with '*' below if multiple options are
61 * Voltage Mode Temperature Mode
62 * Sensor Linux Id Linux Id VIA Id
63 * -------- -------- -------- ------
64 * CPU Diode N/A temp1 0
72 * Note that the BIOS may set the configuration register to a different value
73 * to match the motherboard configuration.
76 /* fans numbered 0-1 */
77 #define VT8231_REG_FAN_MIN(nr) (0x3b + (nr))
78 #define VT8231_REG_FAN(nr) (0x29 + (nr))
80 /* Voltage inputs numbered 0-5 */
82 static const u8 regvolt[] = { 0x21, 0x22, 0x23, 0x24, 0x25, 0x26 };
83 static const u8 regvoltmax[] = { 0x3d, 0x2b, 0x2d, 0x2f, 0x31, 0x33 };
84 static const u8 regvoltmin[] = { 0x3e, 0x2c, 0x2e, 0x30, 0x32, 0x34 };
87 * Temperatures are numbered 1-6 according to the Linux kernel specification.
89 * In the VIA datasheet, however, the temperatures are numbered from zero.
90 * Since it is important that this driver can easily be compared to the VIA
91 * datasheet, we will use the VIA numbering within this driver and map the
92 * kernel sysfs device name to the VIA number in the sysfs callback.
95 #define VT8231_REG_TEMP_LOW01 0x49
96 #define VT8231_REG_TEMP_LOW25 0x4d
98 static const u8 regtemp[] = { 0x1f, 0x21, 0x22, 0x23, 0x24, 0x25 };
99 static const u8 regtempmax[] = { 0x39, 0x3d, 0x2b, 0x2d, 0x2f, 0x31 };
100 static const u8 regtempmin[] = { 0x3a, 0x3e, 0x2c, 0x2e, 0x30, 0x32 };
102 #define TEMP_FROM_REG(reg) (((253 * 4 - (reg)) * 550 + 105) / 210)
103 #define TEMP_MAXMIN_FROM_REG(reg) (((253 - (reg)) * 2200 + 105) / 210)
104 #define TEMP_MAXMIN_TO_REG(val) (253 - ((val) * 210 + 1100) / 2200)
106 #define VT8231_REG_CONFIG 0x40
107 #define VT8231_REG_ALARM1 0x41
108 #define VT8231_REG_ALARM2 0x42
109 #define VT8231_REG_FANDIV 0x47
110 #define VT8231_REG_UCH_CONFIG 0x4a
111 #define VT8231_REG_TEMP1_CONFIG 0x4b
112 #define VT8231_REG_TEMP2_CONFIG 0x4c
115 * temps 0-5 as numbered in VIA datasheet - see later for mapping to Linux
118 #define ISTEMP(i, ch_config) ((i) == 0 ? 1 : \
119 ((ch_config) >> ((i)+1)) & 0x01)
121 #define ISVOLT(i, ch_config) ((i) == 5 ? 1 : \
122 !(((ch_config) >> ((i)+2)) & 0x01))
124 #define DIV_FROM_REG(val) (1 << (val))
127 * NB The values returned here are NOT temperatures. The calibration curves
128 * for the thermistor curves are board-specific and must go in the
129 * sensors.conf file. Temperature sensors are actually ten bits, but the
130 * VIA datasheet only considers the 8 MSBs obtained from the regtemp[]
131 * register. The temperature value returned should have a magnitude of 3,
132 * so we use the VIA scaling as the "true" scaling and use the remaining 2
133 * LSBs as fractional precision.
135 * All the on-chip hardware temperature comparisons for the alarms are only
136 * 8-bits wide, and compare against the 8 MSBs of the temperature. The bits
137 * in the registers VT8231_REG_TEMP_LOW01 and VT8231_REG_TEMP_LOW25 are
142 ****** FAN RPM CONVERSIONS ********
143 * This chip saturates back at 0, not at 255 like many the other chips.
146 static inline u8 FAN_TO_REG(long rpm, int div)
150 return SENSORS_LIMIT(1310720 / (rpm * div), 1, 255);
153 #define FAN_FROM_REG(val, div) ((val) == 0 ? 0 : 1310720 / ((val) * (div)))
159 struct mutex update_lock;
160 struct device *hwmon_dev;
161 char valid; /* !=0 if following fields are valid */
162 unsigned long last_updated; /* In jiffies */
164 u8 in[6]; /* Register value */
165 u8 in_max[6]; /* Register value */
166 u8 in_min[6]; /* Register value */
167 u16 temp[6]; /* Register value 10 bit, right aligned */
168 u8 temp_max[6]; /* Register value */
169 u8 temp_min[6]; /* Register value */
170 u8 fan[2]; /* Register value */
171 u8 fan_min[2]; /* Register value */
172 u8 fan_div[2]; /* Register encoding, shifted right */
173 u16 alarms; /* Register encoding */
177 static struct pci_dev *s_bridge;
178 static int vt8231_probe(struct platform_device *pdev);
179 static int vt8231_remove(struct platform_device *pdev);
180 static struct vt8231_data *vt8231_update_device(struct device *dev);
181 static void vt8231_init_device(struct vt8231_data *data);
183 static inline int vt8231_read_value(struct vt8231_data *data, u8 reg)
185 return inb_p(data->addr + reg);
188 static inline void vt8231_write_value(struct vt8231_data *data, u8 reg,
191 outb_p(value, data->addr + reg);
194 /* following are the sysfs callback functions */
195 static ssize_t show_in(struct device *dev, struct device_attribute *attr,
198 struct sensor_device_attribute *sensor_attr = to_sensor_dev_attr(attr);
199 int nr = sensor_attr->index;
200 struct vt8231_data *data = vt8231_update_device(dev);
202 return sprintf(buf, "%d\n", ((data->in[nr] - 3) * 10000) / 958);
205 static ssize_t show_in_min(struct device *dev, struct device_attribute *attr,
208 struct sensor_device_attribute *sensor_attr = to_sensor_dev_attr(attr);
209 int nr = sensor_attr->index;
210 struct vt8231_data *data = vt8231_update_device(dev);
212 return sprintf(buf, "%d\n", ((data->in_min[nr] - 3) * 10000) / 958);
215 static ssize_t show_in_max(struct device *dev, struct device_attribute *attr,
218 struct sensor_device_attribute *sensor_attr = to_sensor_dev_attr(attr);
219 int nr = sensor_attr->index;
220 struct vt8231_data *data = vt8231_update_device(dev);
222 return sprintf(buf, "%d\n", (((data->in_max[nr] - 3) * 10000) / 958));
225 static ssize_t set_in_min(struct device *dev, struct device_attribute *attr,
226 const char *buf, size_t count)
228 struct sensor_device_attribute *sensor_attr = to_sensor_dev_attr(attr);
229 int nr = sensor_attr->index;
230 struct vt8231_data *data = dev_get_drvdata(dev);
234 err = kstrtoul(buf, 10, &val);
238 mutex_lock(&data->update_lock);
239 data->in_min[nr] = SENSORS_LIMIT(((val * 958) / 10000) + 3, 0, 255);
240 vt8231_write_value(data, regvoltmin[nr], data->in_min[nr]);
241 mutex_unlock(&data->update_lock);
245 static ssize_t set_in_max(struct device *dev, struct device_attribute *attr,
246 const char *buf, size_t count)
248 struct sensor_device_attribute *sensor_attr = to_sensor_dev_attr(attr);
249 int nr = sensor_attr->index;
250 struct vt8231_data *data = dev_get_drvdata(dev);
254 err = kstrtoul(buf, 10, &val);
258 mutex_lock(&data->update_lock);
259 data->in_max[nr] = SENSORS_LIMIT(((val * 958) / 10000) + 3, 0, 255);
260 vt8231_write_value(data, regvoltmax[nr], data->in_max[nr]);
261 mutex_unlock(&data->update_lock);
265 /* Special case for input 5 as this has 3.3V scaling built into the chip */
266 static ssize_t show_in5(struct device *dev, struct device_attribute *attr,
269 struct vt8231_data *data = vt8231_update_device(dev);
271 return sprintf(buf, "%d\n",
272 (((data->in[5] - 3) * 10000 * 54) / (958 * 34)));
275 static ssize_t show_in5_min(struct device *dev, struct device_attribute *attr,
278 struct vt8231_data *data = vt8231_update_device(dev);
280 return sprintf(buf, "%d\n",
281 (((data->in_min[5] - 3) * 10000 * 54) / (958 * 34)));
284 static ssize_t show_in5_max(struct device *dev, struct device_attribute *attr,
287 struct vt8231_data *data = vt8231_update_device(dev);
289 return sprintf(buf, "%d\n",
290 (((data->in_max[5] - 3) * 10000 * 54) / (958 * 34)));
293 static ssize_t set_in5_min(struct device *dev, struct device_attribute *attr,
294 const char *buf, size_t count)
296 struct vt8231_data *data = dev_get_drvdata(dev);
300 err = kstrtoul(buf, 10, &val);
304 mutex_lock(&data->update_lock);
305 data->in_min[5] = SENSORS_LIMIT(((val * 958 * 34) / (10000 * 54)) + 3,
307 vt8231_write_value(data, regvoltmin[5], data->in_min[5]);
308 mutex_unlock(&data->update_lock);
312 static ssize_t set_in5_max(struct device *dev, struct device_attribute *attr,
313 const char *buf, size_t count)
315 struct vt8231_data *data = dev_get_drvdata(dev);
319 err = kstrtoul(buf, 10, &val);
323 mutex_lock(&data->update_lock);
324 data->in_max[5] = SENSORS_LIMIT(((val * 958 * 34) / (10000 * 54)) + 3,
326 vt8231_write_value(data, regvoltmax[5], data->in_max[5]);
327 mutex_unlock(&data->update_lock);
331 #define define_voltage_sysfs(offset) \
332 static SENSOR_DEVICE_ATTR(in##offset##_input, S_IRUGO, \
333 show_in, NULL, offset); \
334 static SENSOR_DEVICE_ATTR(in##offset##_min, S_IRUGO | S_IWUSR, \
335 show_in_min, set_in_min, offset); \
336 static SENSOR_DEVICE_ATTR(in##offset##_max, S_IRUGO | S_IWUSR, \
337 show_in_max, set_in_max, offset)
339 define_voltage_sysfs(0);
340 define_voltage_sysfs(1);
341 define_voltage_sysfs(2);
342 define_voltage_sysfs(3);
343 define_voltage_sysfs(4);
345 static DEVICE_ATTR(in5_input, S_IRUGO, show_in5, NULL);
346 static DEVICE_ATTR(in5_min, S_IRUGO | S_IWUSR, show_in5_min, set_in5_min);
347 static DEVICE_ATTR(in5_max, S_IRUGO | S_IWUSR, show_in5_max, set_in5_max);
350 static ssize_t show_temp0(struct device *dev, struct device_attribute *attr,
353 struct vt8231_data *data = vt8231_update_device(dev);
354 return sprintf(buf, "%d\n", data->temp[0] * 250);
357 static ssize_t show_temp0_max(struct device *dev, struct device_attribute *attr,
360 struct vt8231_data *data = vt8231_update_device(dev);
361 return sprintf(buf, "%d\n", data->temp_max[0] * 1000);
364 static ssize_t show_temp0_min(struct device *dev, struct device_attribute *attr,
367 struct vt8231_data *data = vt8231_update_device(dev);
368 return sprintf(buf, "%d\n", data->temp_min[0] * 1000);
371 static ssize_t set_temp0_max(struct device *dev, struct device_attribute *attr,
372 const char *buf, size_t count)
374 struct vt8231_data *data = dev_get_drvdata(dev);
378 err = kstrtol(buf, 10, &val);
382 mutex_lock(&data->update_lock);
383 data->temp_max[0] = SENSORS_LIMIT((val + 500) / 1000, 0, 255);
384 vt8231_write_value(data, regtempmax[0], data->temp_max[0]);
385 mutex_unlock(&data->update_lock);
388 static ssize_t set_temp0_min(struct device *dev, struct device_attribute *attr,
389 const char *buf, size_t count)
391 struct vt8231_data *data = dev_get_drvdata(dev);
395 err = kstrtol(buf, 10, &val);
399 mutex_lock(&data->update_lock);
400 data->temp_min[0] = SENSORS_LIMIT((val + 500) / 1000, 0, 255);
401 vt8231_write_value(data, regtempmin[0], data->temp_min[0]);
402 mutex_unlock(&data->update_lock);
406 static ssize_t show_temp(struct device *dev, struct device_attribute *attr,
409 struct sensor_device_attribute *sensor_attr = to_sensor_dev_attr(attr);
410 int nr = sensor_attr->index;
411 struct vt8231_data *data = vt8231_update_device(dev);
412 return sprintf(buf, "%d\n", TEMP_FROM_REG(data->temp[nr]));
415 static ssize_t show_temp_max(struct device *dev, struct device_attribute *attr,
418 struct sensor_device_attribute *sensor_attr = to_sensor_dev_attr(attr);
419 int nr = sensor_attr->index;
420 struct vt8231_data *data = vt8231_update_device(dev);
421 return sprintf(buf, "%d\n", TEMP_MAXMIN_FROM_REG(data->temp_max[nr]));
424 static ssize_t show_temp_min(struct device *dev, struct device_attribute *attr,
427 struct sensor_device_attribute *sensor_attr = to_sensor_dev_attr(attr);
428 int nr = sensor_attr->index;
429 struct vt8231_data *data = vt8231_update_device(dev);
430 return sprintf(buf, "%d\n", TEMP_MAXMIN_FROM_REG(data->temp_min[nr]));
433 static ssize_t set_temp_max(struct device *dev, struct device_attribute *attr,
434 const char *buf, size_t count)
436 struct sensor_device_attribute *sensor_attr = to_sensor_dev_attr(attr);
437 int nr = sensor_attr->index;
438 struct vt8231_data *data = dev_get_drvdata(dev);
442 err = kstrtol(buf, 10, &val);
446 mutex_lock(&data->update_lock);
447 data->temp_max[nr] = SENSORS_LIMIT(TEMP_MAXMIN_TO_REG(val), 0, 255);
448 vt8231_write_value(data, regtempmax[nr], data->temp_max[nr]);
449 mutex_unlock(&data->update_lock);
452 static ssize_t set_temp_min(struct device *dev, struct device_attribute *attr,
453 const char *buf, size_t count)
455 struct sensor_device_attribute *sensor_attr = to_sensor_dev_attr(attr);
456 int nr = sensor_attr->index;
457 struct vt8231_data *data = dev_get_drvdata(dev);
461 err = kstrtol(buf, 10, &val);
465 mutex_lock(&data->update_lock);
466 data->temp_min[nr] = SENSORS_LIMIT(TEMP_MAXMIN_TO_REG(val), 0, 255);
467 vt8231_write_value(data, regtempmin[nr], data->temp_min[nr]);
468 mutex_unlock(&data->update_lock);
473 * Note that these map the Linux temperature sensor numbering (1-6) to the VIA
474 * temperature sensor numbering (0-5)
476 #define define_temperature_sysfs(offset) \
477 static SENSOR_DEVICE_ATTR(temp##offset##_input, S_IRUGO, \
478 show_temp, NULL, offset - 1); \
479 static SENSOR_DEVICE_ATTR(temp##offset##_max, S_IRUGO | S_IWUSR, \
480 show_temp_max, set_temp_max, offset - 1); \
481 static SENSOR_DEVICE_ATTR(temp##offset##_max_hyst, S_IRUGO | S_IWUSR, \
482 show_temp_min, set_temp_min, offset - 1)
484 static DEVICE_ATTR(temp1_input, S_IRUGO, show_temp0, NULL);
485 static DEVICE_ATTR(temp1_max, S_IRUGO | S_IWUSR, show_temp0_max, set_temp0_max);
486 static DEVICE_ATTR(temp1_max_hyst, S_IRUGO | S_IWUSR, show_temp0_min,
489 define_temperature_sysfs(2);
490 define_temperature_sysfs(3);
491 define_temperature_sysfs(4);
492 define_temperature_sysfs(5);
493 define_temperature_sysfs(6);
496 static ssize_t show_fan(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[nr],
503 DIV_FROM_REG(data->fan_div[nr])));
506 static ssize_t show_fan_min(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", FAN_FROM_REG(data->fan_min[nr],
513 DIV_FROM_REG(data->fan_div[nr])));
516 static ssize_t show_fan_div(struct device *dev, struct device_attribute *attr,
519 struct sensor_device_attribute *sensor_attr = to_sensor_dev_attr(attr);
520 int nr = sensor_attr->index;
521 struct vt8231_data *data = vt8231_update_device(dev);
522 return sprintf(buf, "%d\n", DIV_FROM_REG(data->fan_div[nr]));
525 static ssize_t set_fan_min(struct device *dev, struct device_attribute *attr,
526 const char *buf, size_t count)
528 struct sensor_device_attribute *sensor_attr = to_sensor_dev_attr(attr);
529 int nr = sensor_attr->index;
530 struct vt8231_data *data = dev_get_drvdata(dev);
534 err = kstrtoul(buf, 10, &val);
538 mutex_lock(&data->update_lock);
539 data->fan_min[nr] = FAN_TO_REG(val, DIV_FROM_REG(data->fan_div[nr]));
540 vt8231_write_value(data, VT8231_REG_FAN_MIN(nr), data->fan_min[nr]);
541 mutex_unlock(&data->update_lock);
545 static ssize_t set_fan_div(struct device *dev, struct device_attribute *attr,
546 const char *buf, size_t count)
548 struct vt8231_data *data = dev_get_drvdata(dev);
549 struct sensor_device_attribute *sensor_attr = to_sensor_dev_attr(attr);
551 int nr = sensor_attr->index;
552 int old = vt8231_read_value(data, VT8231_REG_FANDIV);
553 long min = FAN_FROM_REG(data->fan_min[nr],
554 DIV_FROM_REG(data->fan_div[nr]));
557 err = kstrtoul(buf, 10, &val);
561 mutex_lock(&data->update_lock);
564 data->fan_div[nr] = 0;
567 data->fan_div[nr] = 1;
570 data->fan_div[nr] = 2;
573 data->fan_div[nr] = 3;
576 dev_err(dev, "fan_div value %ld not supported. "
577 "Choose one of 1, 2, 4 or 8!\n", val);
578 mutex_unlock(&data->update_lock);
582 /* Correct the fan minimum speed */
583 data->fan_min[nr] = FAN_TO_REG(min, DIV_FROM_REG(data->fan_div[nr]));
584 vt8231_write_value(data, VT8231_REG_FAN_MIN(nr), data->fan_min[nr]);
586 old = (old & 0x0f) | (data->fan_div[1] << 6) | (data->fan_div[0] << 4);
587 vt8231_write_value(data, VT8231_REG_FANDIV, old);
588 mutex_unlock(&data->update_lock);
593 #define define_fan_sysfs(offset) \
594 static SENSOR_DEVICE_ATTR(fan##offset##_input, S_IRUGO, \
595 show_fan, NULL, offset - 1); \
596 static SENSOR_DEVICE_ATTR(fan##offset##_div, S_IRUGO | S_IWUSR, \
597 show_fan_div, set_fan_div, offset - 1); \
598 static SENSOR_DEVICE_ATTR(fan##offset##_min, S_IRUGO | S_IWUSR, \
599 show_fan_min, set_fan_min, offset - 1)
605 static ssize_t show_alarms(struct device *dev, struct device_attribute *attr,
608 struct vt8231_data *data = vt8231_update_device(dev);
609 return sprintf(buf, "%d\n", data->alarms);
611 static DEVICE_ATTR(alarms, S_IRUGO, show_alarms, NULL);
613 static ssize_t show_alarm(struct device *dev, struct device_attribute *attr,
616 int bitnr = to_sensor_dev_attr(attr)->index;
617 struct vt8231_data *data = vt8231_update_device(dev);
618 return sprintf(buf, "%u\n", (data->alarms >> bitnr) & 1);
620 static SENSOR_DEVICE_ATTR(temp1_alarm, S_IRUGO, show_alarm, NULL, 4);
621 static SENSOR_DEVICE_ATTR(temp2_alarm, S_IRUGO, show_alarm, NULL, 11);
622 static SENSOR_DEVICE_ATTR(temp3_alarm, S_IRUGO, show_alarm, NULL, 0);
623 static SENSOR_DEVICE_ATTR(temp4_alarm, S_IRUGO, show_alarm, NULL, 1);
624 static SENSOR_DEVICE_ATTR(temp5_alarm, S_IRUGO, show_alarm, NULL, 3);
625 static SENSOR_DEVICE_ATTR(temp6_alarm, S_IRUGO, show_alarm, NULL, 8);
626 static SENSOR_DEVICE_ATTR(in0_alarm, S_IRUGO, show_alarm, NULL, 11);
627 static SENSOR_DEVICE_ATTR(in1_alarm, S_IRUGO, show_alarm, NULL, 0);
628 static SENSOR_DEVICE_ATTR(in2_alarm, S_IRUGO, show_alarm, NULL, 1);
629 static SENSOR_DEVICE_ATTR(in3_alarm, S_IRUGO, show_alarm, NULL, 3);
630 static SENSOR_DEVICE_ATTR(in4_alarm, S_IRUGO, show_alarm, NULL, 8);
631 static SENSOR_DEVICE_ATTR(in5_alarm, S_IRUGO, show_alarm, NULL, 2);
632 static SENSOR_DEVICE_ATTR(fan1_alarm, S_IRUGO, show_alarm, NULL, 6);
633 static SENSOR_DEVICE_ATTR(fan2_alarm, S_IRUGO, show_alarm, NULL, 7);
635 static ssize_t show_name(struct device *dev, struct device_attribute
638 struct vt8231_data *data = dev_get_drvdata(dev);
639 return sprintf(buf, "%s\n", data->name);
641 static DEVICE_ATTR(name, S_IRUGO, show_name, NULL);
643 static struct attribute *vt8231_attributes_temps[6][5] = {
645 &dev_attr_temp1_input.attr,
646 &dev_attr_temp1_max_hyst.attr,
647 &dev_attr_temp1_max.attr,
648 &sensor_dev_attr_temp1_alarm.dev_attr.attr,
651 &sensor_dev_attr_temp2_input.dev_attr.attr,
652 &sensor_dev_attr_temp2_max_hyst.dev_attr.attr,
653 &sensor_dev_attr_temp2_max.dev_attr.attr,
654 &sensor_dev_attr_temp2_alarm.dev_attr.attr,
657 &sensor_dev_attr_temp3_input.dev_attr.attr,
658 &sensor_dev_attr_temp3_max_hyst.dev_attr.attr,
659 &sensor_dev_attr_temp3_max.dev_attr.attr,
660 &sensor_dev_attr_temp3_alarm.dev_attr.attr,
663 &sensor_dev_attr_temp4_input.dev_attr.attr,
664 &sensor_dev_attr_temp4_max_hyst.dev_attr.attr,
665 &sensor_dev_attr_temp4_max.dev_attr.attr,
666 &sensor_dev_attr_temp4_alarm.dev_attr.attr,
669 &sensor_dev_attr_temp5_input.dev_attr.attr,
670 &sensor_dev_attr_temp5_max_hyst.dev_attr.attr,
671 &sensor_dev_attr_temp5_max.dev_attr.attr,
672 &sensor_dev_attr_temp5_alarm.dev_attr.attr,
675 &sensor_dev_attr_temp6_input.dev_attr.attr,
676 &sensor_dev_attr_temp6_max_hyst.dev_attr.attr,
677 &sensor_dev_attr_temp6_max.dev_attr.attr,
678 &sensor_dev_attr_temp6_alarm.dev_attr.attr,
683 static const struct attribute_group vt8231_group_temps[6] = {
684 { .attrs = vt8231_attributes_temps[0] },
685 { .attrs = vt8231_attributes_temps[1] },
686 { .attrs = vt8231_attributes_temps[2] },
687 { .attrs = vt8231_attributes_temps[3] },
688 { .attrs = vt8231_attributes_temps[4] },
689 { .attrs = vt8231_attributes_temps[5] },
692 static struct attribute *vt8231_attributes_volts[6][5] = {
694 &sensor_dev_attr_in0_input.dev_attr.attr,
695 &sensor_dev_attr_in0_min.dev_attr.attr,
696 &sensor_dev_attr_in0_max.dev_attr.attr,
697 &sensor_dev_attr_in0_alarm.dev_attr.attr,
700 &sensor_dev_attr_in1_input.dev_attr.attr,
701 &sensor_dev_attr_in1_min.dev_attr.attr,
702 &sensor_dev_attr_in1_max.dev_attr.attr,
703 &sensor_dev_attr_in1_alarm.dev_attr.attr,
706 &sensor_dev_attr_in2_input.dev_attr.attr,
707 &sensor_dev_attr_in2_min.dev_attr.attr,
708 &sensor_dev_attr_in2_max.dev_attr.attr,
709 &sensor_dev_attr_in2_alarm.dev_attr.attr,
712 &sensor_dev_attr_in3_input.dev_attr.attr,
713 &sensor_dev_attr_in3_min.dev_attr.attr,
714 &sensor_dev_attr_in3_max.dev_attr.attr,
715 &sensor_dev_attr_in3_alarm.dev_attr.attr,
718 &sensor_dev_attr_in4_input.dev_attr.attr,
719 &sensor_dev_attr_in4_min.dev_attr.attr,
720 &sensor_dev_attr_in4_max.dev_attr.attr,
721 &sensor_dev_attr_in4_alarm.dev_attr.attr,
724 &dev_attr_in5_input.attr,
725 &dev_attr_in5_min.attr,
726 &dev_attr_in5_max.attr,
727 &sensor_dev_attr_in5_alarm.dev_attr.attr,
732 static const struct attribute_group vt8231_group_volts[6] = {
733 { .attrs = vt8231_attributes_volts[0] },
734 { .attrs = vt8231_attributes_volts[1] },
735 { .attrs = vt8231_attributes_volts[2] },
736 { .attrs = vt8231_attributes_volts[3] },
737 { .attrs = vt8231_attributes_volts[4] },
738 { .attrs = vt8231_attributes_volts[5] },
741 static struct attribute *vt8231_attributes[] = {
742 &sensor_dev_attr_fan1_input.dev_attr.attr,
743 &sensor_dev_attr_fan2_input.dev_attr.attr,
744 &sensor_dev_attr_fan1_min.dev_attr.attr,
745 &sensor_dev_attr_fan2_min.dev_attr.attr,
746 &sensor_dev_attr_fan1_div.dev_attr.attr,
747 &sensor_dev_attr_fan2_div.dev_attr.attr,
748 &sensor_dev_attr_fan1_alarm.dev_attr.attr,
749 &sensor_dev_attr_fan2_alarm.dev_attr.attr,
750 &dev_attr_alarms.attr,
755 static const struct attribute_group vt8231_group = {
756 .attrs = vt8231_attributes,
759 static struct platform_driver vt8231_driver = {
761 .owner = THIS_MODULE,
764 .probe = vt8231_probe,
765 .remove = vt8231_remove,
768 static DEFINE_PCI_DEVICE_TABLE(vt8231_pci_ids) = {
769 { PCI_DEVICE(PCI_VENDOR_ID_VIA, PCI_DEVICE_ID_VIA_8231_4) },
773 MODULE_DEVICE_TABLE(pci, vt8231_pci_ids);
775 static int vt8231_pci_probe(struct pci_dev *dev,
776 const struct pci_device_id *id);
778 static struct pci_driver vt8231_pci_driver = {
780 .id_table = vt8231_pci_ids,
781 .probe = vt8231_pci_probe,
784 static int vt8231_probe(struct platform_device *pdev)
786 struct resource *res;
787 struct vt8231_data *data;
790 /* Reserve the ISA region */
791 res = platform_get_resource(pdev, IORESOURCE_IO, 0);
792 if (!devm_request_region(&pdev->dev, res->start, VT8231_EXTENT,
793 vt8231_driver.driver.name)) {
794 dev_err(&pdev->dev, "Region 0x%lx-0x%lx already in use!\n",
795 (unsigned long)res->start, (unsigned long)res->end);
799 data = devm_kzalloc(&pdev->dev, sizeof(struct vt8231_data), GFP_KERNEL);
803 platform_set_drvdata(pdev, data);
804 data->addr = res->start;
805 data->name = "vt8231";
807 mutex_init(&data->update_lock);
808 vt8231_init_device(data);
810 /* Register sysfs hooks */
811 err = sysfs_create_group(&pdev->dev.kobj, &vt8231_group);
815 /* Must update device information to find out the config field */
816 data->uch_config = vt8231_read_value(data, VT8231_REG_UCH_CONFIG);
818 for (i = 0; i < ARRAY_SIZE(vt8231_group_temps); i++) {
819 if (ISTEMP(i, data->uch_config)) {
820 err = sysfs_create_group(&pdev->dev.kobj,
821 &vt8231_group_temps[i]);
823 goto exit_remove_files;
827 for (i = 0; i < ARRAY_SIZE(vt8231_group_volts); i++) {
828 if (ISVOLT(i, data->uch_config)) {
829 err = sysfs_create_group(&pdev->dev.kobj,
830 &vt8231_group_volts[i]);
832 goto exit_remove_files;
836 data->hwmon_dev = hwmon_device_register(&pdev->dev);
837 if (IS_ERR(data->hwmon_dev)) {
838 err = PTR_ERR(data->hwmon_dev);
839 goto exit_remove_files;
844 for (i = 0; i < ARRAY_SIZE(vt8231_group_volts); i++)
845 sysfs_remove_group(&pdev->dev.kobj, &vt8231_group_volts[i]);
847 for (i = 0; i < ARRAY_SIZE(vt8231_group_temps); i++)
848 sysfs_remove_group(&pdev->dev.kobj, &vt8231_group_temps[i]);
850 sysfs_remove_group(&pdev->dev.kobj, &vt8231_group);
854 static int vt8231_remove(struct platform_device *pdev)
856 struct vt8231_data *data = platform_get_drvdata(pdev);
859 hwmon_device_unregister(data->hwmon_dev);
861 for (i = 0; i < ARRAY_SIZE(vt8231_group_volts); i++)
862 sysfs_remove_group(&pdev->dev.kobj, &vt8231_group_volts[i]);
864 for (i = 0; i < ARRAY_SIZE(vt8231_group_temps); i++)
865 sysfs_remove_group(&pdev->dev.kobj, &vt8231_group_temps[i]);
867 sysfs_remove_group(&pdev->dev.kobj, &vt8231_group);
872 static void vt8231_init_device(struct vt8231_data *data)
874 vt8231_write_value(data, VT8231_REG_TEMP1_CONFIG, 0);
875 vt8231_write_value(data, VT8231_REG_TEMP2_CONFIG, 0);
878 static struct vt8231_data *vt8231_update_device(struct device *dev)
880 struct vt8231_data *data = dev_get_drvdata(dev);
884 mutex_lock(&data->update_lock);
886 if (time_after(jiffies, data->last_updated + HZ + HZ / 2)
888 for (i = 0; i < 6; i++) {
889 if (ISVOLT(i, data->uch_config)) {
890 data->in[i] = vt8231_read_value(data,
892 data->in_min[i] = vt8231_read_value(data,
894 data->in_max[i] = vt8231_read_value(data,
898 for (i = 0; i < 2; i++) {
899 data->fan[i] = vt8231_read_value(data,
901 data->fan_min[i] = vt8231_read_value(data,
902 VT8231_REG_FAN_MIN(i));
905 low = vt8231_read_value(data, VT8231_REG_TEMP_LOW01);
906 low = (low >> 6) | ((low & 0x30) >> 2)
907 | (vt8231_read_value(data, VT8231_REG_TEMP_LOW25) << 4);
908 for (i = 0; i < 6; i++) {
909 if (ISTEMP(i, data->uch_config)) {
910 data->temp[i] = (vt8231_read_value(data,
912 | ((low >> (2 * i)) & 0x03);
913 data->temp_max[i] = vt8231_read_value(data,
915 data->temp_min[i] = vt8231_read_value(data,
920 i = vt8231_read_value(data, VT8231_REG_FANDIV);
921 data->fan_div[0] = (i >> 4) & 0x03;
922 data->fan_div[1] = i >> 6;
923 data->alarms = vt8231_read_value(data, VT8231_REG_ALARM1) |
924 (vt8231_read_value(data, VT8231_REG_ALARM2) << 8);
926 /* Set alarm flags correctly */
927 if (!data->fan[0] && data->fan_min[0])
928 data->alarms |= 0x40;
929 else if (data->fan[0] && !data->fan_min[0])
930 data->alarms &= ~0x40;
932 if (!data->fan[1] && data->fan_min[1])
933 data->alarms |= 0x80;
934 else if (data->fan[1] && !data->fan_min[1])
935 data->alarms &= ~0x80;
937 data->last_updated = jiffies;
941 mutex_unlock(&data->update_lock);
946 static int vt8231_device_add(unsigned short address)
948 struct resource res = {
950 .end = address + VT8231_EXTENT - 1,
952 .flags = IORESOURCE_IO,
956 err = acpi_check_resource_conflict(&res);
960 pdev = platform_device_alloc("vt8231", address);
963 pr_err("Device allocation failed\n");
967 err = platform_device_add_resources(pdev, &res, 1);
969 pr_err("Device resource addition failed (%d)\n", err);
970 goto exit_device_put;
973 err = platform_device_add(pdev);
975 pr_err("Device addition failed (%d)\n", err);
976 goto exit_device_put;
982 platform_device_put(pdev);
987 static int vt8231_pci_probe(struct pci_dev *dev,
988 const struct pci_device_id *id)
992 address = force_addr & 0xff00;
993 dev_warn(&dev->dev, "Forcing ISA address 0x%x\n",
996 if (PCIBIOS_SUCCESSFUL !=
997 pci_write_config_word(dev, VT8231_BASE_REG, address | 1))
1001 if (PCIBIOS_SUCCESSFUL != pci_read_config_word(dev, VT8231_BASE_REG,
1005 address = val & ~(VT8231_EXTENT - 1);
1007 dev_err(&dev->dev, "base address not set - upgrade BIOS or use force_addr=0xaddr\n");
1011 if (PCIBIOS_SUCCESSFUL != pci_read_config_word(dev, VT8231_ENABLE_REG,
1015 if (!(val & 0x0001)) {
1016 dev_warn(&dev->dev, "enabling sensors\n");
1017 if (PCIBIOS_SUCCESSFUL !=
1018 pci_write_config_word(dev, VT8231_ENABLE_REG,
1023 if (platform_driver_register(&vt8231_driver))
1026 /* Sets global pdev as a side effect */
1027 if (vt8231_device_add(address))
1028 goto exit_unregister;
1031 * Always return failure here. This is to allow other drivers to bind
1032 * to this pci device. We don't really want to have control over the
1033 * pci device, we only wanted to read as few register values from it.
1037 * We do, however, mark ourselves as using the PCI device to stop it
1040 s_bridge = pci_dev_get(dev);
1044 platform_driver_unregister(&vt8231_driver);
1049 static int __init sm_vt8231_init(void)
1051 return pci_register_driver(&vt8231_pci_driver);
1054 static void __exit sm_vt8231_exit(void)
1056 pci_unregister_driver(&vt8231_pci_driver);
1057 if (s_bridge != NULL) {
1058 platform_device_unregister(pdev);
1059 platform_driver_unregister(&vt8231_driver);
1060 pci_dev_put(s_bridge);
1065 MODULE_AUTHOR("Roger Lucas <vt8231@hiddenengine.co.uk>");
1066 MODULE_DESCRIPTION("VT8231 sensors");
1067 MODULE_LICENSE("GPL");
1069 module_init(sm_vt8231_init);
1070 module_exit(sm_vt8231_exit);