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)
148 if (rpm <= 0 || rpm > 1310720)
150 return clamp_val(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 in_show(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 in_min_show(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 in_max_show(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 in_min_store(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] = clamp_val(((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 in_max_store(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] = clamp_val(((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 in5_input_show(struct device *dev,
267 struct device_attribute *attr, char *buf)
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 in5_min_show(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 in5_max_show(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 in5_min_store(struct device *dev,
294 struct device_attribute *attr, const char *buf,
297 struct vt8231_data *data = dev_get_drvdata(dev);
301 err = kstrtoul(buf, 10, &val);
305 mutex_lock(&data->update_lock);
306 data->in_min[5] = clamp_val(((val * 958 * 34) / (10000 * 54)) + 3,
308 vt8231_write_value(data, regvoltmin[5], data->in_min[5]);
309 mutex_unlock(&data->update_lock);
313 static ssize_t in5_max_store(struct device *dev,
314 struct device_attribute *attr, const char *buf,
317 struct vt8231_data *data = dev_get_drvdata(dev);
321 err = kstrtoul(buf, 10, &val);
325 mutex_lock(&data->update_lock);
326 data->in_max[5] = clamp_val(((val * 958 * 34) / (10000 * 54)) + 3,
328 vt8231_write_value(data, regvoltmax[5], data->in_max[5]);
329 mutex_unlock(&data->update_lock);
333 static SENSOR_DEVICE_ATTR_RO(in0_input, in, 0);
334 static SENSOR_DEVICE_ATTR_RW(in0_min, in_min, 0);
335 static SENSOR_DEVICE_ATTR_RW(in0_max, in_max, 0);
336 static SENSOR_DEVICE_ATTR_RO(in1_input, in, 1);
337 static SENSOR_DEVICE_ATTR_RW(in1_min, in_min, 1);
338 static SENSOR_DEVICE_ATTR_RW(in1_max, in_max, 1);
339 static SENSOR_DEVICE_ATTR_RO(in2_input, in, 2);
340 static SENSOR_DEVICE_ATTR_RW(in2_min, in_min, 2);
341 static SENSOR_DEVICE_ATTR_RW(in2_max, in_max, 2);
342 static SENSOR_DEVICE_ATTR_RO(in3_input, in, 3);
343 static SENSOR_DEVICE_ATTR_RW(in3_min, in_min, 3);
344 static SENSOR_DEVICE_ATTR_RW(in3_max, in_max, 3);
345 static SENSOR_DEVICE_ATTR_RO(in4_input, in, 4);
346 static SENSOR_DEVICE_ATTR_RW(in4_min, in_min, 4);
347 static SENSOR_DEVICE_ATTR_RW(in4_max, in_max, 4);
349 static DEVICE_ATTR_RO(in5_input);
350 static DEVICE_ATTR_RW(in5_min);
351 static DEVICE_ATTR_RW(in5_max);
354 static ssize_t temp1_input_show(struct device *dev,
355 struct device_attribute *attr, char *buf)
357 struct vt8231_data *data = vt8231_update_device(dev);
358 return sprintf(buf, "%d\n", data->temp[0] * 250);
361 static ssize_t temp1_max_show(struct device *dev, struct device_attribute *attr,
364 struct vt8231_data *data = vt8231_update_device(dev);
365 return sprintf(buf, "%d\n", data->temp_max[0] * 1000);
368 static ssize_t temp1_max_hyst_show(struct device *dev,
369 struct device_attribute *attr, char *buf)
371 struct vt8231_data *data = vt8231_update_device(dev);
372 return sprintf(buf, "%d\n", data->temp_min[0] * 1000);
375 static ssize_t temp1_max_store(struct device *dev,
376 struct device_attribute *attr, const char *buf,
379 struct vt8231_data *data = dev_get_drvdata(dev);
383 err = kstrtol(buf, 10, &val);
387 mutex_lock(&data->update_lock);
388 data->temp_max[0] = clamp_val((val + 500) / 1000, 0, 255);
389 vt8231_write_value(data, regtempmax[0], data->temp_max[0]);
390 mutex_unlock(&data->update_lock);
393 static ssize_t temp1_max_hyst_store(struct device *dev,
394 struct device_attribute *attr,
395 const char *buf, size_t count)
397 struct vt8231_data *data = dev_get_drvdata(dev);
401 err = kstrtol(buf, 10, &val);
405 mutex_lock(&data->update_lock);
406 data->temp_min[0] = clamp_val((val + 500) / 1000, 0, 255);
407 vt8231_write_value(data, regtempmin[0], data->temp_min[0]);
408 mutex_unlock(&data->update_lock);
412 static ssize_t temp_show(struct device *dev, struct device_attribute *attr,
415 struct sensor_device_attribute *sensor_attr = to_sensor_dev_attr(attr);
416 int nr = sensor_attr->index;
417 struct vt8231_data *data = vt8231_update_device(dev);
418 return sprintf(buf, "%d\n", TEMP_FROM_REG(data->temp[nr]));
421 static ssize_t temp_max_show(struct device *dev,
422 struct device_attribute *attr, char *buf)
424 struct sensor_device_attribute *sensor_attr = to_sensor_dev_attr(attr);
425 int nr = sensor_attr->index;
426 struct vt8231_data *data = vt8231_update_device(dev);
427 return sprintf(buf, "%d\n", TEMP_MAXMIN_FROM_REG(data->temp_max[nr]));
430 static ssize_t temp_min_show(struct device *dev,
431 struct device_attribute *attr, char *buf)
433 struct sensor_device_attribute *sensor_attr = to_sensor_dev_attr(attr);
434 int nr = sensor_attr->index;
435 struct vt8231_data *data = vt8231_update_device(dev);
436 return sprintf(buf, "%d\n", TEMP_MAXMIN_FROM_REG(data->temp_min[nr]));
439 static ssize_t temp_max_store(struct device *dev,
440 struct device_attribute *attr, const char *buf,
443 struct sensor_device_attribute *sensor_attr = to_sensor_dev_attr(attr);
444 int nr = sensor_attr->index;
445 struct vt8231_data *data = dev_get_drvdata(dev);
449 err = kstrtol(buf, 10, &val);
453 mutex_lock(&data->update_lock);
454 data->temp_max[nr] = clamp_val(TEMP_MAXMIN_TO_REG(val), 0, 255);
455 vt8231_write_value(data, regtempmax[nr], data->temp_max[nr]);
456 mutex_unlock(&data->update_lock);
459 static ssize_t temp_min_store(struct device *dev,
460 struct device_attribute *attr, const char *buf,
463 struct sensor_device_attribute *sensor_attr = to_sensor_dev_attr(attr);
464 int nr = sensor_attr->index;
465 struct vt8231_data *data = dev_get_drvdata(dev);
469 err = kstrtol(buf, 10, &val);
473 mutex_lock(&data->update_lock);
474 data->temp_min[nr] = clamp_val(TEMP_MAXMIN_TO_REG(val), 0, 255);
475 vt8231_write_value(data, regtempmin[nr], data->temp_min[nr]);
476 mutex_unlock(&data->update_lock);
481 * Note that these map the Linux temperature sensor numbering (1-6) to the VIA
482 * temperature sensor numbering (0-5)
485 static DEVICE_ATTR_RO(temp1_input);
486 static DEVICE_ATTR_RW(temp1_max);
487 static DEVICE_ATTR_RW(temp1_max_hyst);
489 static SENSOR_DEVICE_ATTR_RO(temp2_input, temp, 1);
490 static SENSOR_DEVICE_ATTR_RW(temp2_max, temp_max, 1);
491 static SENSOR_DEVICE_ATTR_RW(temp2_max_hyst, temp_min, 1);
492 static SENSOR_DEVICE_ATTR_RO(temp3_input, temp, 2);
493 static SENSOR_DEVICE_ATTR_RW(temp3_max, temp_max, 2);
494 static SENSOR_DEVICE_ATTR_RW(temp3_max_hyst, temp_min, 2);
495 static SENSOR_DEVICE_ATTR_RO(temp4_input, temp, 3);
496 static SENSOR_DEVICE_ATTR_RW(temp4_max, temp_max, 3);
497 static SENSOR_DEVICE_ATTR_RW(temp4_max_hyst, temp_min, 3);
498 static SENSOR_DEVICE_ATTR_RO(temp5_input, temp, 4);
499 static SENSOR_DEVICE_ATTR_RW(temp5_max, temp_max, 4);
500 static SENSOR_DEVICE_ATTR_RW(temp5_max_hyst, temp_min, 4);
501 static SENSOR_DEVICE_ATTR_RO(temp6_input, temp, 5);
502 static SENSOR_DEVICE_ATTR_RW(temp6_max, temp_max, 5);
503 static SENSOR_DEVICE_ATTR_RW(temp6_max_hyst, temp_min, 5);
506 static ssize_t fan_show(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[nr],
513 DIV_FROM_REG(data->fan_div[nr])));
516 static ssize_t fan_min_show(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", FAN_FROM_REG(data->fan_min[nr],
523 DIV_FROM_REG(data->fan_div[nr])));
526 static ssize_t fan_div_show(struct device *dev, struct device_attribute *attr,
529 struct sensor_device_attribute *sensor_attr = to_sensor_dev_attr(attr);
530 int nr = sensor_attr->index;
531 struct vt8231_data *data = vt8231_update_device(dev);
532 return sprintf(buf, "%d\n", DIV_FROM_REG(data->fan_div[nr]));
535 static ssize_t fan_min_store(struct device *dev,
536 struct device_attribute *attr, const char *buf,
539 struct sensor_device_attribute *sensor_attr = to_sensor_dev_attr(attr);
540 int nr = sensor_attr->index;
541 struct vt8231_data *data = dev_get_drvdata(dev);
545 err = kstrtoul(buf, 10, &val);
549 mutex_lock(&data->update_lock);
550 data->fan_min[nr] = FAN_TO_REG(val, DIV_FROM_REG(data->fan_div[nr]));
551 vt8231_write_value(data, VT8231_REG_FAN_MIN(nr), data->fan_min[nr]);
552 mutex_unlock(&data->update_lock);
556 static ssize_t fan_div_store(struct device *dev,
557 struct device_attribute *attr, const char *buf,
560 struct vt8231_data *data = dev_get_drvdata(dev);
561 struct sensor_device_attribute *sensor_attr = to_sensor_dev_attr(attr);
563 int nr = sensor_attr->index;
564 int old = vt8231_read_value(data, VT8231_REG_FANDIV);
565 long min = FAN_FROM_REG(data->fan_min[nr],
566 DIV_FROM_REG(data->fan_div[nr]));
569 err = kstrtoul(buf, 10, &val);
573 mutex_lock(&data->update_lock);
576 data->fan_div[nr] = 0;
579 data->fan_div[nr] = 1;
582 data->fan_div[nr] = 2;
585 data->fan_div[nr] = 3;
589 "fan_div value %ld not supported. Choose one of 1, 2, 4 or 8!\n",
591 mutex_unlock(&data->update_lock);
595 /* Correct the fan minimum speed */
596 data->fan_min[nr] = FAN_TO_REG(min, DIV_FROM_REG(data->fan_div[nr]));
597 vt8231_write_value(data, VT8231_REG_FAN_MIN(nr), data->fan_min[nr]);
599 old = (old & 0x0f) | (data->fan_div[1] << 6) | (data->fan_div[0] << 4);
600 vt8231_write_value(data, VT8231_REG_FANDIV, old);
601 mutex_unlock(&data->update_lock);
605 static SENSOR_DEVICE_ATTR_RO(fan1_input, fan, 0);
606 static SENSOR_DEVICE_ATTR_RW(fan1_min, fan_min, 0);
607 static SENSOR_DEVICE_ATTR_RW(fan1_div, fan_div, 0);
608 static SENSOR_DEVICE_ATTR_RO(fan2_input, fan, 1);
609 static SENSOR_DEVICE_ATTR_RW(fan2_min, fan_min, 1);
610 static SENSOR_DEVICE_ATTR_RW(fan2_div, fan_div, 1);
613 static ssize_t alarms_show(struct device *dev, struct device_attribute *attr,
616 struct vt8231_data *data = vt8231_update_device(dev);
617 return sprintf(buf, "%d\n", data->alarms);
619 static DEVICE_ATTR_RO(alarms);
621 static ssize_t alarm_show(struct device *dev, struct device_attribute *attr,
624 int bitnr = to_sensor_dev_attr(attr)->index;
625 struct vt8231_data *data = vt8231_update_device(dev);
626 return sprintf(buf, "%u\n", (data->alarms >> bitnr) & 1);
628 static SENSOR_DEVICE_ATTR_RO(temp1_alarm, alarm, 4);
629 static SENSOR_DEVICE_ATTR_RO(temp2_alarm, alarm, 11);
630 static SENSOR_DEVICE_ATTR_RO(temp3_alarm, alarm, 0);
631 static SENSOR_DEVICE_ATTR_RO(temp4_alarm, alarm, 1);
632 static SENSOR_DEVICE_ATTR_RO(temp5_alarm, alarm, 3);
633 static SENSOR_DEVICE_ATTR_RO(temp6_alarm, alarm, 8);
634 static SENSOR_DEVICE_ATTR_RO(in0_alarm, alarm, 11);
635 static SENSOR_DEVICE_ATTR_RO(in1_alarm, alarm, 0);
636 static SENSOR_DEVICE_ATTR_RO(in2_alarm, alarm, 1);
637 static SENSOR_DEVICE_ATTR_RO(in3_alarm, alarm, 3);
638 static SENSOR_DEVICE_ATTR_RO(in4_alarm, alarm, 8);
639 static SENSOR_DEVICE_ATTR_RO(in5_alarm, alarm, 2);
640 static SENSOR_DEVICE_ATTR_RO(fan1_alarm, alarm, 6);
641 static SENSOR_DEVICE_ATTR_RO(fan2_alarm, alarm, 7);
643 static ssize_t name_show(struct device *dev, struct device_attribute
646 struct vt8231_data *data = dev_get_drvdata(dev);
647 return sprintf(buf, "%s\n", data->name);
649 static DEVICE_ATTR_RO(name);
651 static struct attribute *vt8231_attributes_temps[6][5] = {
653 &dev_attr_temp1_input.attr,
654 &dev_attr_temp1_max_hyst.attr,
655 &dev_attr_temp1_max.attr,
656 &sensor_dev_attr_temp1_alarm.dev_attr.attr,
659 &sensor_dev_attr_temp2_input.dev_attr.attr,
660 &sensor_dev_attr_temp2_max_hyst.dev_attr.attr,
661 &sensor_dev_attr_temp2_max.dev_attr.attr,
662 &sensor_dev_attr_temp2_alarm.dev_attr.attr,
665 &sensor_dev_attr_temp3_input.dev_attr.attr,
666 &sensor_dev_attr_temp3_max_hyst.dev_attr.attr,
667 &sensor_dev_attr_temp3_max.dev_attr.attr,
668 &sensor_dev_attr_temp3_alarm.dev_attr.attr,
671 &sensor_dev_attr_temp4_input.dev_attr.attr,
672 &sensor_dev_attr_temp4_max_hyst.dev_attr.attr,
673 &sensor_dev_attr_temp4_max.dev_attr.attr,
674 &sensor_dev_attr_temp4_alarm.dev_attr.attr,
677 &sensor_dev_attr_temp5_input.dev_attr.attr,
678 &sensor_dev_attr_temp5_max_hyst.dev_attr.attr,
679 &sensor_dev_attr_temp5_max.dev_attr.attr,
680 &sensor_dev_attr_temp5_alarm.dev_attr.attr,
683 &sensor_dev_attr_temp6_input.dev_attr.attr,
684 &sensor_dev_attr_temp6_max_hyst.dev_attr.attr,
685 &sensor_dev_attr_temp6_max.dev_attr.attr,
686 &sensor_dev_attr_temp6_alarm.dev_attr.attr,
691 static const struct attribute_group vt8231_group_temps[6] = {
692 { .attrs = vt8231_attributes_temps[0] },
693 { .attrs = vt8231_attributes_temps[1] },
694 { .attrs = vt8231_attributes_temps[2] },
695 { .attrs = vt8231_attributes_temps[3] },
696 { .attrs = vt8231_attributes_temps[4] },
697 { .attrs = vt8231_attributes_temps[5] },
700 static struct attribute *vt8231_attributes_volts[6][5] = {
702 &sensor_dev_attr_in0_input.dev_attr.attr,
703 &sensor_dev_attr_in0_min.dev_attr.attr,
704 &sensor_dev_attr_in0_max.dev_attr.attr,
705 &sensor_dev_attr_in0_alarm.dev_attr.attr,
708 &sensor_dev_attr_in1_input.dev_attr.attr,
709 &sensor_dev_attr_in1_min.dev_attr.attr,
710 &sensor_dev_attr_in1_max.dev_attr.attr,
711 &sensor_dev_attr_in1_alarm.dev_attr.attr,
714 &sensor_dev_attr_in2_input.dev_attr.attr,
715 &sensor_dev_attr_in2_min.dev_attr.attr,
716 &sensor_dev_attr_in2_max.dev_attr.attr,
717 &sensor_dev_attr_in2_alarm.dev_attr.attr,
720 &sensor_dev_attr_in3_input.dev_attr.attr,
721 &sensor_dev_attr_in3_min.dev_attr.attr,
722 &sensor_dev_attr_in3_max.dev_attr.attr,
723 &sensor_dev_attr_in3_alarm.dev_attr.attr,
726 &sensor_dev_attr_in4_input.dev_attr.attr,
727 &sensor_dev_attr_in4_min.dev_attr.attr,
728 &sensor_dev_attr_in4_max.dev_attr.attr,
729 &sensor_dev_attr_in4_alarm.dev_attr.attr,
732 &dev_attr_in5_input.attr,
733 &dev_attr_in5_min.attr,
734 &dev_attr_in5_max.attr,
735 &sensor_dev_attr_in5_alarm.dev_attr.attr,
740 static const struct attribute_group vt8231_group_volts[6] = {
741 { .attrs = vt8231_attributes_volts[0] },
742 { .attrs = vt8231_attributes_volts[1] },
743 { .attrs = vt8231_attributes_volts[2] },
744 { .attrs = vt8231_attributes_volts[3] },
745 { .attrs = vt8231_attributes_volts[4] },
746 { .attrs = vt8231_attributes_volts[5] },
749 static struct attribute *vt8231_attributes[] = {
750 &sensor_dev_attr_fan1_input.dev_attr.attr,
751 &sensor_dev_attr_fan2_input.dev_attr.attr,
752 &sensor_dev_attr_fan1_min.dev_attr.attr,
753 &sensor_dev_attr_fan2_min.dev_attr.attr,
754 &sensor_dev_attr_fan1_div.dev_attr.attr,
755 &sensor_dev_attr_fan2_div.dev_attr.attr,
756 &sensor_dev_attr_fan1_alarm.dev_attr.attr,
757 &sensor_dev_attr_fan2_alarm.dev_attr.attr,
758 &dev_attr_alarms.attr,
763 static const struct attribute_group vt8231_group = {
764 .attrs = vt8231_attributes,
767 static struct platform_driver vt8231_driver = {
771 .probe = vt8231_probe,
772 .remove = vt8231_remove,
775 static const struct pci_device_id vt8231_pci_ids[] = {
776 { PCI_DEVICE(PCI_VENDOR_ID_VIA, PCI_DEVICE_ID_VIA_8231_4) },
780 MODULE_DEVICE_TABLE(pci, vt8231_pci_ids);
782 static int vt8231_pci_probe(struct pci_dev *dev,
783 const struct pci_device_id *id);
785 static struct pci_driver vt8231_pci_driver = {
787 .id_table = vt8231_pci_ids,
788 .probe = vt8231_pci_probe,
791 static int vt8231_probe(struct platform_device *pdev)
793 struct resource *res;
794 struct vt8231_data *data;
797 /* Reserve the ISA region */
798 res = platform_get_resource(pdev, IORESOURCE_IO, 0);
799 if (!devm_request_region(&pdev->dev, res->start, VT8231_EXTENT,
800 vt8231_driver.driver.name)) {
801 dev_err(&pdev->dev, "Region 0x%lx-0x%lx already in use!\n",
802 (unsigned long)res->start, (unsigned long)res->end);
806 data = devm_kzalloc(&pdev->dev, sizeof(struct vt8231_data), GFP_KERNEL);
810 platform_set_drvdata(pdev, data);
811 data->addr = res->start;
812 data->name = "vt8231";
814 mutex_init(&data->update_lock);
815 vt8231_init_device(data);
817 /* Register sysfs hooks */
818 err = sysfs_create_group(&pdev->dev.kobj, &vt8231_group);
822 /* Must update device information to find out the config field */
823 data->uch_config = vt8231_read_value(data, VT8231_REG_UCH_CONFIG);
825 for (i = 0; i < ARRAY_SIZE(vt8231_group_temps); i++) {
826 if (ISTEMP(i, data->uch_config)) {
827 err = sysfs_create_group(&pdev->dev.kobj,
828 &vt8231_group_temps[i]);
830 goto exit_remove_files;
834 for (i = 0; i < ARRAY_SIZE(vt8231_group_volts); i++) {
835 if (ISVOLT(i, data->uch_config)) {
836 err = sysfs_create_group(&pdev->dev.kobj,
837 &vt8231_group_volts[i]);
839 goto exit_remove_files;
843 data->hwmon_dev = hwmon_device_register(&pdev->dev);
844 if (IS_ERR(data->hwmon_dev)) {
845 err = PTR_ERR(data->hwmon_dev);
846 goto exit_remove_files;
851 for (i = 0; i < ARRAY_SIZE(vt8231_group_volts); i++)
852 sysfs_remove_group(&pdev->dev.kobj, &vt8231_group_volts[i]);
854 for (i = 0; i < ARRAY_SIZE(vt8231_group_temps); i++)
855 sysfs_remove_group(&pdev->dev.kobj, &vt8231_group_temps[i]);
857 sysfs_remove_group(&pdev->dev.kobj, &vt8231_group);
861 static int vt8231_remove(struct platform_device *pdev)
863 struct vt8231_data *data = platform_get_drvdata(pdev);
866 hwmon_device_unregister(data->hwmon_dev);
868 for (i = 0; i < ARRAY_SIZE(vt8231_group_volts); i++)
869 sysfs_remove_group(&pdev->dev.kobj, &vt8231_group_volts[i]);
871 for (i = 0; i < ARRAY_SIZE(vt8231_group_temps); i++)
872 sysfs_remove_group(&pdev->dev.kobj, &vt8231_group_temps[i]);
874 sysfs_remove_group(&pdev->dev.kobj, &vt8231_group);
879 static void vt8231_init_device(struct vt8231_data *data)
881 vt8231_write_value(data, VT8231_REG_TEMP1_CONFIG, 0);
882 vt8231_write_value(data, VT8231_REG_TEMP2_CONFIG, 0);
885 static struct vt8231_data *vt8231_update_device(struct device *dev)
887 struct vt8231_data *data = dev_get_drvdata(dev);
891 mutex_lock(&data->update_lock);
893 if (time_after(jiffies, data->last_updated + HZ + HZ / 2)
895 for (i = 0; i < 6; i++) {
896 if (ISVOLT(i, data->uch_config)) {
897 data->in[i] = vt8231_read_value(data,
899 data->in_min[i] = vt8231_read_value(data,
901 data->in_max[i] = vt8231_read_value(data,
905 for (i = 0; i < 2; i++) {
906 data->fan[i] = vt8231_read_value(data,
908 data->fan_min[i] = vt8231_read_value(data,
909 VT8231_REG_FAN_MIN(i));
912 low = vt8231_read_value(data, VT8231_REG_TEMP_LOW01);
913 low = (low >> 6) | ((low & 0x30) >> 2)
914 | (vt8231_read_value(data, VT8231_REG_TEMP_LOW25) << 4);
915 for (i = 0; i < 6; i++) {
916 if (ISTEMP(i, data->uch_config)) {
917 data->temp[i] = (vt8231_read_value(data,
919 | ((low >> (2 * i)) & 0x03);
920 data->temp_max[i] = vt8231_read_value(data,
922 data->temp_min[i] = vt8231_read_value(data,
927 i = vt8231_read_value(data, VT8231_REG_FANDIV);
928 data->fan_div[0] = (i >> 4) & 0x03;
929 data->fan_div[1] = i >> 6;
930 data->alarms = vt8231_read_value(data, VT8231_REG_ALARM1) |
931 (vt8231_read_value(data, VT8231_REG_ALARM2) << 8);
933 /* Set alarm flags correctly */
934 if (!data->fan[0] && data->fan_min[0])
935 data->alarms |= 0x40;
936 else if (data->fan[0] && !data->fan_min[0])
937 data->alarms &= ~0x40;
939 if (!data->fan[1] && data->fan_min[1])
940 data->alarms |= 0x80;
941 else if (data->fan[1] && !data->fan_min[1])
942 data->alarms &= ~0x80;
944 data->last_updated = jiffies;
948 mutex_unlock(&data->update_lock);
953 static int vt8231_device_add(unsigned short address)
955 struct resource res = {
957 .end = address + VT8231_EXTENT - 1,
959 .flags = IORESOURCE_IO,
963 err = acpi_check_resource_conflict(&res);
967 pdev = platform_device_alloc("vt8231", address);
970 pr_err("Device allocation failed\n");
974 err = platform_device_add_resources(pdev, &res, 1);
976 pr_err("Device resource addition failed (%d)\n", err);
977 goto exit_device_put;
980 err = platform_device_add(pdev);
982 pr_err("Device addition failed (%d)\n", err);
983 goto exit_device_put;
989 platform_device_put(pdev);
994 static int vt8231_pci_probe(struct pci_dev *dev,
995 const struct pci_device_id *id)
999 address = force_addr & 0xff00;
1000 dev_warn(&dev->dev, "Forcing ISA address 0x%x\n",
1003 if (PCIBIOS_SUCCESSFUL !=
1004 pci_write_config_word(dev, VT8231_BASE_REG, address | 1))
1008 if (PCIBIOS_SUCCESSFUL != pci_read_config_word(dev, VT8231_BASE_REG,
1012 address = val & ~(VT8231_EXTENT - 1);
1014 dev_err(&dev->dev, "base address not set - upgrade BIOS or use force_addr=0xaddr\n");
1018 if (PCIBIOS_SUCCESSFUL != pci_read_config_word(dev, VT8231_ENABLE_REG,
1022 if (!(val & 0x0001)) {
1023 dev_warn(&dev->dev, "enabling sensors\n");
1024 if (PCIBIOS_SUCCESSFUL !=
1025 pci_write_config_word(dev, VT8231_ENABLE_REG,
1030 if (platform_driver_register(&vt8231_driver))
1033 /* Sets global pdev as a side effect */
1034 if (vt8231_device_add(address))
1035 goto exit_unregister;
1038 * Always return failure here. This is to allow other drivers to bind
1039 * to this pci device. We don't really want to have control over the
1040 * pci device, we only wanted to read as few register values from it.
1044 * We do, however, mark ourselves as using the PCI device to stop it
1047 s_bridge = pci_dev_get(dev);
1051 platform_driver_unregister(&vt8231_driver);
1056 static int __init sm_vt8231_init(void)
1058 return pci_register_driver(&vt8231_pci_driver);
1061 static void __exit sm_vt8231_exit(void)
1063 pci_unregister_driver(&vt8231_pci_driver);
1064 if (s_bridge != NULL) {
1065 platform_device_unregister(pdev);
1066 platform_driver_unregister(&vt8231_driver);
1067 pci_dev_put(s_bridge);
1072 MODULE_AUTHOR("Roger Lucas <vt8231@hiddenengine.co.uk>");
1073 MODULE_DESCRIPTION("VT8231 sensors");
1074 MODULE_LICENSE("GPL");
1076 module_init(sm_vt8231_init);
1077 module_exit(sm_vt8231_exit);