Loading...
1// SPDX-License-Identifier: GPL-2.0-or-later
2/*
3 * vt8231.c - Part of lm_sensors, Linux kernel modules
4 * for hardware monitoring
5 *
6 * Copyright (c) 2005 Roger Lucas <vt8231@hiddenengine.co.uk>
7 * Copyright (c) 2002 Mark D. Studebaker <mdsxyz123@yahoo.com>
8 * Aaron M. Marsh <amarsh@sdf.lonestar.org>
9 */
10
11/*
12 * Supports VIA VT8231 South Bridge embedded sensors
13 */
14
15#define pr_fmt(fmt) KBUILD_MODNAME ": " fmt
16
17#include <linux/module.h>
18#include <linux/init.h>
19#include <linux/slab.h>
20#include <linux/pci.h>
21#include <linux/jiffies.h>
22#include <linux/platform_device.h>
23#include <linux/hwmon.h>
24#include <linux/hwmon-sysfs.h>
25#include <linux/hwmon-vid.h>
26#include <linux/err.h>
27#include <linux/mutex.h>
28#include <linux/acpi.h>
29#include <linux/io.h>
30
31static int force_addr;
32module_param(force_addr, int, 0);
33MODULE_PARM_DESC(force_addr, "Initialize the base address of the sensors");
34
35static struct platform_device *pdev;
36
37#define VT8231_EXTENT 0x80
38#define VT8231_BASE_REG 0x70
39#define VT8231_ENABLE_REG 0x74
40
41/*
42 * The VT8231 registers
43 *
44 * The reset value for the input channel configuration is used (Reg 0x4A=0x07)
45 * which sets the selected inputs marked with '*' below if multiple options are
46 * possible:
47 *
48 * Voltage Mode Temperature Mode
49 * Sensor Linux Id Linux Id VIA Id
50 * -------- -------- -------- ------
51 * CPU Diode N/A temp1 0
52 * UIC1 in0 temp2 * 1
53 * UIC2 in1 * temp3 2
54 * UIC3 in2 * temp4 3
55 * UIC4 in3 * temp5 4
56 * UIC5 in4 * temp6 5
57 * 3.3V in5 N/A
58 *
59 * Note that the BIOS may set the configuration register to a different value
60 * to match the motherboard configuration.
61 */
62
63/* fans numbered 0-1 */
64#define VT8231_REG_FAN_MIN(nr) (0x3b + (nr))
65#define VT8231_REG_FAN(nr) (0x29 + (nr))
66
67/* Voltage inputs numbered 0-5 */
68
69static const u8 regvolt[] = { 0x21, 0x22, 0x23, 0x24, 0x25, 0x26 };
70static const u8 regvoltmax[] = { 0x3d, 0x2b, 0x2d, 0x2f, 0x31, 0x33 };
71static const u8 regvoltmin[] = { 0x3e, 0x2c, 0x2e, 0x30, 0x32, 0x34 };
72
73/*
74 * Temperatures are numbered 1-6 according to the Linux kernel specification.
75 *
76 * In the VIA datasheet, however, the temperatures are numbered from zero.
77 * Since it is important that this driver can easily be compared to the VIA
78 * datasheet, we will use the VIA numbering within this driver and map the
79 * kernel sysfs device name to the VIA number in the sysfs callback.
80 */
81
82#define VT8231_REG_TEMP_LOW01 0x49
83#define VT8231_REG_TEMP_LOW25 0x4d
84
85static const u8 regtemp[] = { 0x1f, 0x21, 0x22, 0x23, 0x24, 0x25 };
86static const u8 regtempmax[] = { 0x39, 0x3d, 0x2b, 0x2d, 0x2f, 0x31 };
87static const u8 regtempmin[] = { 0x3a, 0x3e, 0x2c, 0x2e, 0x30, 0x32 };
88
89#define TEMP_FROM_REG(reg) (((253 * 4 - (reg)) * 550 + 105) / 210)
90#define TEMP_MAXMIN_FROM_REG(reg) (((253 - (reg)) * 2200 + 105) / 210)
91#define TEMP_MAXMIN_TO_REG(val) (253 - ((val) * 210 + 1100) / 2200)
92
93#define VT8231_REG_CONFIG 0x40
94#define VT8231_REG_ALARM1 0x41
95#define VT8231_REG_ALARM2 0x42
96#define VT8231_REG_FANDIV 0x47
97#define VT8231_REG_UCH_CONFIG 0x4a
98#define VT8231_REG_TEMP1_CONFIG 0x4b
99#define VT8231_REG_TEMP2_CONFIG 0x4c
100
101/*
102 * temps 0-5 as numbered in VIA datasheet - see later for mapping to Linux
103 * numbering
104 */
105#define ISTEMP(i, ch_config) ((i) == 0 ? 1 : \
106 ((ch_config) >> ((i)+1)) & 0x01)
107/* voltages 0-5 */
108#define ISVOLT(i, ch_config) ((i) == 5 ? 1 : \
109 !(((ch_config) >> ((i)+2)) & 0x01))
110
111#define DIV_FROM_REG(val) (1 << (val))
112
113/*
114 * NB The values returned here are NOT temperatures. The calibration curves
115 * for the thermistor curves are board-specific and must go in the
116 * sensors.conf file. Temperature sensors are actually ten bits, but the
117 * VIA datasheet only considers the 8 MSBs obtained from the regtemp[]
118 * register. The temperature value returned should have a magnitude of 3,
119 * so we use the VIA scaling as the "true" scaling and use the remaining 2
120 * LSBs as fractional precision.
121 *
122 * All the on-chip hardware temperature comparisons for the alarms are only
123 * 8-bits wide, and compare against the 8 MSBs of the temperature. The bits
124 * in the registers VT8231_REG_TEMP_LOW01 and VT8231_REG_TEMP_LOW25 are
125 * ignored.
126 */
127
128/*
129 ****** FAN RPM CONVERSIONS ********
130 * This chip saturates back at 0, not at 255 like many the other chips.
131 * So, 0 means 0 RPM
132 */
133static inline u8 FAN_TO_REG(long rpm, int div)
134{
135 if (rpm <= 0 || rpm > 1310720)
136 return 0;
137 return clamp_val(1310720 / (rpm * div), 1, 255);
138}
139
140#define FAN_FROM_REG(val, div) ((val) == 0 ? 0 : 1310720 / ((val) * (div)))
141
142struct vt8231_data {
143 unsigned short addr;
144 const char *name;
145
146 struct mutex update_lock;
147 struct device *hwmon_dev;
148 char valid; /* !=0 if following fields are valid */
149 unsigned long last_updated; /* In jiffies */
150
151 u8 in[6]; /* Register value */
152 u8 in_max[6]; /* Register value */
153 u8 in_min[6]; /* Register value */
154 u16 temp[6]; /* Register value 10 bit, right aligned */
155 u8 temp_max[6]; /* Register value */
156 u8 temp_min[6]; /* Register value */
157 u8 fan[2]; /* Register value */
158 u8 fan_min[2]; /* Register value */
159 u8 fan_div[2]; /* Register encoding, shifted right */
160 u16 alarms; /* Register encoding */
161 u8 uch_config;
162};
163
164static struct pci_dev *s_bridge;
165static int vt8231_probe(struct platform_device *pdev);
166static int vt8231_remove(struct platform_device *pdev);
167static struct vt8231_data *vt8231_update_device(struct device *dev);
168static void vt8231_init_device(struct vt8231_data *data);
169
170static inline int vt8231_read_value(struct vt8231_data *data, u8 reg)
171{
172 return inb_p(data->addr + reg);
173}
174
175static inline void vt8231_write_value(struct vt8231_data *data, u8 reg,
176 u8 value)
177{
178 outb_p(value, data->addr + reg);
179}
180
181/* following are the sysfs callback functions */
182static ssize_t in_show(struct device *dev, struct device_attribute *attr,
183 char *buf)
184{
185 struct sensor_device_attribute *sensor_attr = to_sensor_dev_attr(attr);
186 int nr = sensor_attr->index;
187 struct vt8231_data *data = vt8231_update_device(dev);
188
189 return sprintf(buf, "%d\n", ((data->in[nr] - 3) * 10000) / 958);
190}
191
192static ssize_t in_min_show(struct device *dev, struct device_attribute *attr,
193 char *buf)
194{
195 struct sensor_device_attribute *sensor_attr = to_sensor_dev_attr(attr);
196 int nr = sensor_attr->index;
197 struct vt8231_data *data = vt8231_update_device(dev);
198
199 return sprintf(buf, "%d\n", ((data->in_min[nr] - 3) * 10000) / 958);
200}
201
202static ssize_t in_max_show(struct device *dev, struct device_attribute *attr,
203 char *buf)
204{
205 struct sensor_device_attribute *sensor_attr = to_sensor_dev_attr(attr);
206 int nr = sensor_attr->index;
207 struct vt8231_data *data = vt8231_update_device(dev);
208
209 return sprintf(buf, "%d\n", (((data->in_max[nr] - 3) * 10000) / 958));
210}
211
212static ssize_t in_min_store(struct device *dev, struct device_attribute *attr,
213 const char *buf, size_t count)
214{
215 struct sensor_device_attribute *sensor_attr = to_sensor_dev_attr(attr);
216 int nr = sensor_attr->index;
217 struct vt8231_data *data = dev_get_drvdata(dev);
218 unsigned long val;
219 int err;
220
221 err = kstrtoul(buf, 10, &val);
222 if (err)
223 return err;
224
225 mutex_lock(&data->update_lock);
226 data->in_min[nr] = clamp_val(((val * 958) / 10000) + 3, 0, 255);
227 vt8231_write_value(data, regvoltmin[nr], data->in_min[nr]);
228 mutex_unlock(&data->update_lock);
229 return count;
230}
231
232static ssize_t in_max_store(struct device *dev, struct device_attribute *attr,
233 const char *buf, size_t count)
234{
235 struct sensor_device_attribute *sensor_attr = to_sensor_dev_attr(attr);
236 int nr = sensor_attr->index;
237 struct vt8231_data *data = dev_get_drvdata(dev);
238 unsigned long val;
239 int err;
240
241 err = kstrtoul(buf, 10, &val);
242 if (err)
243 return err;
244
245 mutex_lock(&data->update_lock);
246 data->in_max[nr] = clamp_val(((val * 958) / 10000) + 3, 0, 255);
247 vt8231_write_value(data, regvoltmax[nr], data->in_max[nr]);
248 mutex_unlock(&data->update_lock);
249 return count;
250}
251
252/* Special case for input 5 as this has 3.3V scaling built into the chip */
253static ssize_t in5_input_show(struct device *dev,
254 struct device_attribute *attr, char *buf)
255{
256 struct vt8231_data *data = vt8231_update_device(dev);
257
258 return sprintf(buf, "%d\n",
259 (((data->in[5] - 3) * 10000 * 54) / (958 * 34)));
260}
261
262static ssize_t in5_min_show(struct device *dev, struct device_attribute *attr,
263 char *buf)
264{
265 struct vt8231_data *data = vt8231_update_device(dev);
266
267 return sprintf(buf, "%d\n",
268 (((data->in_min[5] - 3) * 10000 * 54) / (958 * 34)));
269}
270
271static ssize_t in5_max_show(struct device *dev, struct device_attribute *attr,
272 char *buf)
273{
274 struct vt8231_data *data = vt8231_update_device(dev);
275
276 return sprintf(buf, "%d\n",
277 (((data->in_max[5] - 3) * 10000 * 54) / (958 * 34)));
278}
279
280static ssize_t in5_min_store(struct device *dev,
281 struct device_attribute *attr, const char *buf,
282 size_t count)
283{
284 struct vt8231_data *data = dev_get_drvdata(dev);
285 unsigned long val;
286 int err;
287
288 err = kstrtoul(buf, 10, &val);
289 if (err)
290 return err;
291
292 mutex_lock(&data->update_lock);
293 data->in_min[5] = clamp_val(((val * 958 * 34) / (10000 * 54)) + 3,
294 0, 255);
295 vt8231_write_value(data, regvoltmin[5], data->in_min[5]);
296 mutex_unlock(&data->update_lock);
297 return count;
298}
299
300static ssize_t in5_max_store(struct device *dev,
301 struct device_attribute *attr, const char *buf,
302 size_t count)
303{
304 struct vt8231_data *data = dev_get_drvdata(dev);
305 unsigned long val;
306 int err;
307
308 err = kstrtoul(buf, 10, &val);
309 if (err)
310 return err;
311
312 mutex_lock(&data->update_lock);
313 data->in_max[5] = clamp_val(((val * 958 * 34) / (10000 * 54)) + 3,
314 0, 255);
315 vt8231_write_value(data, regvoltmax[5], data->in_max[5]);
316 mutex_unlock(&data->update_lock);
317 return count;
318}
319
320static SENSOR_DEVICE_ATTR_RO(in0_input, in, 0);
321static SENSOR_DEVICE_ATTR_RW(in0_min, in_min, 0);
322static SENSOR_DEVICE_ATTR_RW(in0_max, in_max, 0);
323static SENSOR_DEVICE_ATTR_RO(in1_input, in, 1);
324static SENSOR_DEVICE_ATTR_RW(in1_min, in_min, 1);
325static SENSOR_DEVICE_ATTR_RW(in1_max, in_max, 1);
326static SENSOR_DEVICE_ATTR_RO(in2_input, in, 2);
327static SENSOR_DEVICE_ATTR_RW(in2_min, in_min, 2);
328static SENSOR_DEVICE_ATTR_RW(in2_max, in_max, 2);
329static SENSOR_DEVICE_ATTR_RO(in3_input, in, 3);
330static SENSOR_DEVICE_ATTR_RW(in3_min, in_min, 3);
331static SENSOR_DEVICE_ATTR_RW(in3_max, in_max, 3);
332static SENSOR_DEVICE_ATTR_RO(in4_input, in, 4);
333static SENSOR_DEVICE_ATTR_RW(in4_min, in_min, 4);
334static SENSOR_DEVICE_ATTR_RW(in4_max, in_max, 4);
335
336static DEVICE_ATTR_RO(in5_input);
337static DEVICE_ATTR_RW(in5_min);
338static DEVICE_ATTR_RW(in5_max);
339
340/* Temperatures */
341static ssize_t temp1_input_show(struct device *dev,
342 struct device_attribute *attr, char *buf)
343{
344 struct vt8231_data *data = vt8231_update_device(dev);
345 return sprintf(buf, "%d\n", data->temp[0] * 250);
346}
347
348static ssize_t temp1_max_show(struct device *dev, struct device_attribute *attr,
349 char *buf)
350{
351 struct vt8231_data *data = vt8231_update_device(dev);
352 return sprintf(buf, "%d\n", data->temp_max[0] * 1000);
353}
354
355static ssize_t temp1_max_hyst_show(struct device *dev,
356 struct device_attribute *attr, char *buf)
357{
358 struct vt8231_data *data = vt8231_update_device(dev);
359 return sprintf(buf, "%d\n", data->temp_min[0] * 1000);
360}
361
362static ssize_t temp1_max_store(struct device *dev,
363 struct device_attribute *attr, const char *buf,
364 size_t count)
365{
366 struct vt8231_data *data = dev_get_drvdata(dev);
367 long val;
368 int err;
369
370 err = kstrtol(buf, 10, &val);
371 if (err)
372 return err;
373
374 mutex_lock(&data->update_lock);
375 data->temp_max[0] = clamp_val((val + 500) / 1000, 0, 255);
376 vt8231_write_value(data, regtempmax[0], data->temp_max[0]);
377 mutex_unlock(&data->update_lock);
378 return count;
379}
380static ssize_t temp1_max_hyst_store(struct device *dev,
381 struct device_attribute *attr,
382 const char *buf, size_t count)
383{
384 struct vt8231_data *data = dev_get_drvdata(dev);
385 long val;
386 int err;
387
388 err = kstrtol(buf, 10, &val);
389 if (err)
390 return err;
391
392 mutex_lock(&data->update_lock);
393 data->temp_min[0] = clamp_val((val + 500) / 1000, 0, 255);
394 vt8231_write_value(data, regtempmin[0], data->temp_min[0]);
395 mutex_unlock(&data->update_lock);
396 return count;
397}
398
399static ssize_t temp_show(struct device *dev, struct device_attribute *attr,
400 char *buf)
401{
402 struct sensor_device_attribute *sensor_attr = to_sensor_dev_attr(attr);
403 int nr = sensor_attr->index;
404 struct vt8231_data *data = vt8231_update_device(dev);
405 return sprintf(buf, "%d\n", TEMP_FROM_REG(data->temp[nr]));
406}
407
408static ssize_t temp_max_show(struct device *dev,
409 struct device_attribute *attr, char *buf)
410{
411 struct sensor_device_attribute *sensor_attr = to_sensor_dev_attr(attr);
412 int nr = sensor_attr->index;
413 struct vt8231_data *data = vt8231_update_device(dev);
414 return sprintf(buf, "%d\n", TEMP_MAXMIN_FROM_REG(data->temp_max[nr]));
415}
416
417static ssize_t temp_min_show(struct device *dev,
418 struct device_attribute *attr, char *buf)
419{
420 struct sensor_device_attribute *sensor_attr = to_sensor_dev_attr(attr);
421 int nr = sensor_attr->index;
422 struct vt8231_data *data = vt8231_update_device(dev);
423 return sprintf(buf, "%d\n", TEMP_MAXMIN_FROM_REG(data->temp_min[nr]));
424}
425
426static ssize_t temp_max_store(struct device *dev,
427 struct device_attribute *attr, const char *buf,
428 size_t count)
429{
430 struct sensor_device_attribute *sensor_attr = to_sensor_dev_attr(attr);
431 int nr = sensor_attr->index;
432 struct vt8231_data *data = dev_get_drvdata(dev);
433 long val;
434 int err;
435
436 err = kstrtol(buf, 10, &val);
437 if (err)
438 return err;
439
440 mutex_lock(&data->update_lock);
441 data->temp_max[nr] = clamp_val(TEMP_MAXMIN_TO_REG(val), 0, 255);
442 vt8231_write_value(data, regtempmax[nr], data->temp_max[nr]);
443 mutex_unlock(&data->update_lock);
444 return count;
445}
446static ssize_t temp_min_store(struct device *dev,
447 struct device_attribute *attr, const char *buf,
448 size_t count)
449{
450 struct sensor_device_attribute *sensor_attr = to_sensor_dev_attr(attr);
451 int nr = sensor_attr->index;
452 struct vt8231_data *data = dev_get_drvdata(dev);
453 long val;
454 int err;
455
456 err = kstrtol(buf, 10, &val);
457 if (err)
458 return err;
459
460 mutex_lock(&data->update_lock);
461 data->temp_min[nr] = clamp_val(TEMP_MAXMIN_TO_REG(val), 0, 255);
462 vt8231_write_value(data, regtempmin[nr], data->temp_min[nr]);
463 mutex_unlock(&data->update_lock);
464 return count;
465}
466
467/*
468 * Note that these map the Linux temperature sensor numbering (1-6) to the VIA
469 * temperature sensor numbering (0-5)
470 */
471
472static DEVICE_ATTR_RO(temp1_input);
473static DEVICE_ATTR_RW(temp1_max);
474static DEVICE_ATTR_RW(temp1_max_hyst);
475
476static SENSOR_DEVICE_ATTR_RO(temp2_input, temp, 1);
477static SENSOR_DEVICE_ATTR_RW(temp2_max, temp_max, 1);
478static SENSOR_DEVICE_ATTR_RW(temp2_max_hyst, temp_min, 1);
479static SENSOR_DEVICE_ATTR_RO(temp3_input, temp, 2);
480static SENSOR_DEVICE_ATTR_RW(temp3_max, temp_max, 2);
481static SENSOR_DEVICE_ATTR_RW(temp3_max_hyst, temp_min, 2);
482static SENSOR_DEVICE_ATTR_RO(temp4_input, temp, 3);
483static SENSOR_DEVICE_ATTR_RW(temp4_max, temp_max, 3);
484static SENSOR_DEVICE_ATTR_RW(temp4_max_hyst, temp_min, 3);
485static SENSOR_DEVICE_ATTR_RO(temp5_input, temp, 4);
486static SENSOR_DEVICE_ATTR_RW(temp5_max, temp_max, 4);
487static SENSOR_DEVICE_ATTR_RW(temp5_max_hyst, temp_min, 4);
488static SENSOR_DEVICE_ATTR_RO(temp6_input, temp, 5);
489static SENSOR_DEVICE_ATTR_RW(temp6_max, temp_max, 5);
490static SENSOR_DEVICE_ATTR_RW(temp6_max_hyst, temp_min, 5);
491
492/* Fans */
493static ssize_t fan_show(struct device *dev, struct device_attribute *attr,
494 char *buf)
495{
496 struct sensor_device_attribute *sensor_attr = to_sensor_dev_attr(attr);
497 int nr = sensor_attr->index;
498 struct vt8231_data *data = vt8231_update_device(dev);
499 return sprintf(buf, "%d\n", FAN_FROM_REG(data->fan[nr],
500 DIV_FROM_REG(data->fan_div[nr])));
501}
502
503static ssize_t fan_min_show(struct device *dev, struct device_attribute *attr,
504 char *buf)
505{
506 struct sensor_device_attribute *sensor_attr = to_sensor_dev_attr(attr);
507 int nr = sensor_attr->index;
508 struct vt8231_data *data = vt8231_update_device(dev);
509 return sprintf(buf, "%d\n", FAN_FROM_REG(data->fan_min[nr],
510 DIV_FROM_REG(data->fan_div[nr])));
511}
512
513static ssize_t fan_div_show(struct device *dev, struct device_attribute *attr,
514 char *buf)
515{
516 struct sensor_device_attribute *sensor_attr = to_sensor_dev_attr(attr);
517 int nr = sensor_attr->index;
518 struct vt8231_data *data = vt8231_update_device(dev);
519 return sprintf(buf, "%d\n", DIV_FROM_REG(data->fan_div[nr]));
520}
521
522static ssize_t fan_min_store(struct device *dev,
523 struct device_attribute *attr, const char *buf,
524 size_t count)
525{
526 struct sensor_device_attribute *sensor_attr = to_sensor_dev_attr(attr);
527 int nr = sensor_attr->index;
528 struct vt8231_data *data = dev_get_drvdata(dev);
529 unsigned long val;
530 int err;
531
532 err = kstrtoul(buf, 10, &val);
533 if (err)
534 return err;
535
536 mutex_lock(&data->update_lock);
537 data->fan_min[nr] = FAN_TO_REG(val, DIV_FROM_REG(data->fan_div[nr]));
538 vt8231_write_value(data, VT8231_REG_FAN_MIN(nr), data->fan_min[nr]);
539 mutex_unlock(&data->update_lock);
540 return count;
541}
542
543static ssize_t fan_div_store(struct device *dev,
544 struct device_attribute *attr, const char *buf,
545 size_t count)
546{
547 struct vt8231_data *data = dev_get_drvdata(dev);
548 struct sensor_device_attribute *sensor_attr = to_sensor_dev_attr(attr);
549 unsigned long val;
550 int nr = sensor_attr->index;
551 int old = vt8231_read_value(data, VT8231_REG_FANDIV);
552 long min = FAN_FROM_REG(data->fan_min[nr],
553 DIV_FROM_REG(data->fan_div[nr]));
554 int err;
555
556 err = kstrtoul(buf, 10, &val);
557 if (err)
558 return err;
559
560 mutex_lock(&data->update_lock);
561 switch (val) {
562 case 1:
563 data->fan_div[nr] = 0;
564 break;
565 case 2:
566 data->fan_div[nr] = 1;
567 break;
568 case 4:
569 data->fan_div[nr] = 2;
570 break;
571 case 8:
572 data->fan_div[nr] = 3;
573 break;
574 default:
575 dev_err(dev,
576 "fan_div value %ld not supported. Choose one of 1, 2, 4 or 8!\n",
577 val);
578 mutex_unlock(&data->update_lock);
579 return -EINVAL;
580 }
581
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]);
585
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);
589 return count;
590}
591
592static SENSOR_DEVICE_ATTR_RO(fan1_input, fan, 0);
593static SENSOR_DEVICE_ATTR_RW(fan1_min, fan_min, 0);
594static SENSOR_DEVICE_ATTR_RW(fan1_div, fan_div, 0);
595static SENSOR_DEVICE_ATTR_RO(fan2_input, fan, 1);
596static SENSOR_DEVICE_ATTR_RW(fan2_min, fan_min, 1);
597static SENSOR_DEVICE_ATTR_RW(fan2_div, fan_div, 1);
598
599/* Alarms */
600static ssize_t alarms_show(struct device *dev, struct device_attribute *attr,
601 char *buf)
602{
603 struct vt8231_data *data = vt8231_update_device(dev);
604 return sprintf(buf, "%d\n", data->alarms);
605}
606static DEVICE_ATTR_RO(alarms);
607
608static ssize_t alarm_show(struct device *dev, struct device_attribute *attr,
609 char *buf)
610{
611 int bitnr = to_sensor_dev_attr(attr)->index;
612 struct vt8231_data *data = vt8231_update_device(dev);
613 return sprintf(buf, "%u\n", (data->alarms >> bitnr) & 1);
614}
615static SENSOR_DEVICE_ATTR_RO(temp1_alarm, alarm, 4);
616static SENSOR_DEVICE_ATTR_RO(temp2_alarm, alarm, 11);
617static SENSOR_DEVICE_ATTR_RO(temp3_alarm, alarm, 0);
618static SENSOR_DEVICE_ATTR_RO(temp4_alarm, alarm, 1);
619static SENSOR_DEVICE_ATTR_RO(temp5_alarm, alarm, 3);
620static SENSOR_DEVICE_ATTR_RO(temp6_alarm, alarm, 8);
621static SENSOR_DEVICE_ATTR_RO(in0_alarm, alarm, 11);
622static SENSOR_DEVICE_ATTR_RO(in1_alarm, alarm, 0);
623static SENSOR_DEVICE_ATTR_RO(in2_alarm, alarm, 1);
624static SENSOR_DEVICE_ATTR_RO(in3_alarm, alarm, 3);
625static SENSOR_DEVICE_ATTR_RO(in4_alarm, alarm, 8);
626static SENSOR_DEVICE_ATTR_RO(in5_alarm, alarm, 2);
627static SENSOR_DEVICE_ATTR_RO(fan1_alarm, alarm, 6);
628static SENSOR_DEVICE_ATTR_RO(fan2_alarm, alarm, 7);
629
630static ssize_t name_show(struct device *dev, struct device_attribute
631 *devattr, char *buf)
632{
633 struct vt8231_data *data = dev_get_drvdata(dev);
634 return sprintf(buf, "%s\n", data->name);
635}
636static DEVICE_ATTR_RO(name);
637
638static struct attribute *vt8231_attributes_temps[6][5] = {
639 {
640 &dev_attr_temp1_input.attr,
641 &dev_attr_temp1_max_hyst.attr,
642 &dev_attr_temp1_max.attr,
643 &sensor_dev_attr_temp1_alarm.dev_attr.attr,
644 NULL
645 }, {
646 &sensor_dev_attr_temp2_input.dev_attr.attr,
647 &sensor_dev_attr_temp2_max_hyst.dev_attr.attr,
648 &sensor_dev_attr_temp2_max.dev_attr.attr,
649 &sensor_dev_attr_temp2_alarm.dev_attr.attr,
650 NULL
651 }, {
652 &sensor_dev_attr_temp3_input.dev_attr.attr,
653 &sensor_dev_attr_temp3_max_hyst.dev_attr.attr,
654 &sensor_dev_attr_temp3_max.dev_attr.attr,
655 &sensor_dev_attr_temp3_alarm.dev_attr.attr,
656 NULL
657 }, {
658 &sensor_dev_attr_temp4_input.dev_attr.attr,
659 &sensor_dev_attr_temp4_max_hyst.dev_attr.attr,
660 &sensor_dev_attr_temp4_max.dev_attr.attr,
661 &sensor_dev_attr_temp4_alarm.dev_attr.attr,
662 NULL
663 }, {
664 &sensor_dev_attr_temp5_input.dev_attr.attr,
665 &sensor_dev_attr_temp5_max_hyst.dev_attr.attr,
666 &sensor_dev_attr_temp5_max.dev_attr.attr,
667 &sensor_dev_attr_temp5_alarm.dev_attr.attr,
668 NULL
669 }, {
670 &sensor_dev_attr_temp6_input.dev_attr.attr,
671 &sensor_dev_attr_temp6_max_hyst.dev_attr.attr,
672 &sensor_dev_attr_temp6_max.dev_attr.attr,
673 &sensor_dev_attr_temp6_alarm.dev_attr.attr,
674 NULL
675 }
676};
677
678static const struct attribute_group vt8231_group_temps[6] = {
679 { .attrs = vt8231_attributes_temps[0] },
680 { .attrs = vt8231_attributes_temps[1] },
681 { .attrs = vt8231_attributes_temps[2] },
682 { .attrs = vt8231_attributes_temps[3] },
683 { .attrs = vt8231_attributes_temps[4] },
684 { .attrs = vt8231_attributes_temps[5] },
685};
686
687static struct attribute *vt8231_attributes_volts[6][5] = {
688 {
689 &sensor_dev_attr_in0_input.dev_attr.attr,
690 &sensor_dev_attr_in0_min.dev_attr.attr,
691 &sensor_dev_attr_in0_max.dev_attr.attr,
692 &sensor_dev_attr_in0_alarm.dev_attr.attr,
693 NULL
694 }, {
695 &sensor_dev_attr_in1_input.dev_attr.attr,
696 &sensor_dev_attr_in1_min.dev_attr.attr,
697 &sensor_dev_attr_in1_max.dev_attr.attr,
698 &sensor_dev_attr_in1_alarm.dev_attr.attr,
699 NULL
700 }, {
701 &sensor_dev_attr_in2_input.dev_attr.attr,
702 &sensor_dev_attr_in2_min.dev_attr.attr,
703 &sensor_dev_attr_in2_max.dev_attr.attr,
704 &sensor_dev_attr_in2_alarm.dev_attr.attr,
705 NULL
706 }, {
707 &sensor_dev_attr_in3_input.dev_attr.attr,
708 &sensor_dev_attr_in3_min.dev_attr.attr,
709 &sensor_dev_attr_in3_max.dev_attr.attr,
710 &sensor_dev_attr_in3_alarm.dev_attr.attr,
711 NULL
712 }, {
713 &sensor_dev_attr_in4_input.dev_attr.attr,
714 &sensor_dev_attr_in4_min.dev_attr.attr,
715 &sensor_dev_attr_in4_max.dev_attr.attr,
716 &sensor_dev_attr_in4_alarm.dev_attr.attr,
717 NULL
718 }, {
719 &dev_attr_in5_input.attr,
720 &dev_attr_in5_min.attr,
721 &dev_attr_in5_max.attr,
722 &sensor_dev_attr_in5_alarm.dev_attr.attr,
723 NULL
724 }
725};
726
727static const struct attribute_group vt8231_group_volts[6] = {
728 { .attrs = vt8231_attributes_volts[0] },
729 { .attrs = vt8231_attributes_volts[1] },
730 { .attrs = vt8231_attributes_volts[2] },
731 { .attrs = vt8231_attributes_volts[3] },
732 { .attrs = vt8231_attributes_volts[4] },
733 { .attrs = vt8231_attributes_volts[5] },
734};
735
736static struct attribute *vt8231_attributes[] = {
737 &sensor_dev_attr_fan1_input.dev_attr.attr,
738 &sensor_dev_attr_fan2_input.dev_attr.attr,
739 &sensor_dev_attr_fan1_min.dev_attr.attr,
740 &sensor_dev_attr_fan2_min.dev_attr.attr,
741 &sensor_dev_attr_fan1_div.dev_attr.attr,
742 &sensor_dev_attr_fan2_div.dev_attr.attr,
743 &sensor_dev_attr_fan1_alarm.dev_attr.attr,
744 &sensor_dev_attr_fan2_alarm.dev_attr.attr,
745 &dev_attr_alarms.attr,
746 &dev_attr_name.attr,
747 NULL
748};
749
750static const struct attribute_group vt8231_group = {
751 .attrs = vt8231_attributes,
752};
753
754static struct platform_driver vt8231_driver = {
755 .driver = {
756 .name = "vt8231",
757 },
758 .probe = vt8231_probe,
759 .remove = vt8231_remove,
760};
761
762static const struct pci_device_id vt8231_pci_ids[] = {
763 { PCI_DEVICE(PCI_VENDOR_ID_VIA, PCI_DEVICE_ID_VIA_8231_4) },
764 { 0, }
765};
766
767MODULE_DEVICE_TABLE(pci, vt8231_pci_ids);
768
769static int vt8231_pci_probe(struct pci_dev *dev,
770 const struct pci_device_id *id);
771
772static struct pci_driver vt8231_pci_driver = {
773 .name = "vt8231",
774 .id_table = vt8231_pci_ids,
775 .probe = vt8231_pci_probe,
776};
777
778static int vt8231_probe(struct platform_device *pdev)
779{
780 struct resource *res;
781 struct vt8231_data *data;
782 int err = 0, i;
783
784 /* Reserve the ISA region */
785 res = platform_get_resource(pdev, IORESOURCE_IO, 0);
786 if (!devm_request_region(&pdev->dev, res->start, VT8231_EXTENT,
787 vt8231_driver.driver.name)) {
788 dev_err(&pdev->dev, "Region 0x%lx-0x%lx already in use!\n",
789 (unsigned long)res->start, (unsigned long)res->end);
790 return -ENODEV;
791 }
792
793 data = devm_kzalloc(&pdev->dev, sizeof(struct vt8231_data), GFP_KERNEL);
794 if (!data)
795 return -ENOMEM;
796
797 platform_set_drvdata(pdev, data);
798 data->addr = res->start;
799 data->name = "vt8231";
800
801 mutex_init(&data->update_lock);
802 vt8231_init_device(data);
803
804 /* Register sysfs hooks */
805 err = sysfs_create_group(&pdev->dev.kobj, &vt8231_group);
806 if (err)
807 return err;
808
809 /* Must update device information to find out the config field */
810 data->uch_config = vt8231_read_value(data, VT8231_REG_UCH_CONFIG);
811
812 for (i = 0; i < ARRAY_SIZE(vt8231_group_temps); i++) {
813 if (ISTEMP(i, data->uch_config)) {
814 err = sysfs_create_group(&pdev->dev.kobj,
815 &vt8231_group_temps[i]);
816 if (err)
817 goto exit_remove_files;
818 }
819 }
820
821 for (i = 0; i < ARRAY_SIZE(vt8231_group_volts); i++) {
822 if (ISVOLT(i, data->uch_config)) {
823 err = sysfs_create_group(&pdev->dev.kobj,
824 &vt8231_group_volts[i]);
825 if (err)
826 goto exit_remove_files;
827 }
828 }
829
830 data->hwmon_dev = hwmon_device_register(&pdev->dev);
831 if (IS_ERR(data->hwmon_dev)) {
832 err = PTR_ERR(data->hwmon_dev);
833 goto exit_remove_files;
834 }
835 return 0;
836
837exit_remove_files:
838 for (i = 0; i < ARRAY_SIZE(vt8231_group_volts); i++)
839 sysfs_remove_group(&pdev->dev.kobj, &vt8231_group_volts[i]);
840
841 for (i = 0; i < ARRAY_SIZE(vt8231_group_temps); i++)
842 sysfs_remove_group(&pdev->dev.kobj, &vt8231_group_temps[i]);
843
844 sysfs_remove_group(&pdev->dev.kobj, &vt8231_group);
845 return err;
846}
847
848static int vt8231_remove(struct platform_device *pdev)
849{
850 struct vt8231_data *data = platform_get_drvdata(pdev);
851 int i;
852
853 hwmon_device_unregister(data->hwmon_dev);
854
855 for (i = 0; i < ARRAY_SIZE(vt8231_group_volts); i++)
856 sysfs_remove_group(&pdev->dev.kobj, &vt8231_group_volts[i]);
857
858 for (i = 0; i < ARRAY_SIZE(vt8231_group_temps); i++)
859 sysfs_remove_group(&pdev->dev.kobj, &vt8231_group_temps[i]);
860
861 sysfs_remove_group(&pdev->dev.kobj, &vt8231_group);
862
863 return 0;
864}
865
866static void vt8231_init_device(struct vt8231_data *data)
867{
868 vt8231_write_value(data, VT8231_REG_TEMP1_CONFIG, 0);
869 vt8231_write_value(data, VT8231_REG_TEMP2_CONFIG, 0);
870}
871
872static struct vt8231_data *vt8231_update_device(struct device *dev)
873{
874 struct vt8231_data *data = dev_get_drvdata(dev);
875 int i;
876 u16 low;
877
878 mutex_lock(&data->update_lock);
879
880 if (time_after(jiffies, data->last_updated + HZ + HZ / 2)
881 || !data->valid) {
882 for (i = 0; i < 6; i++) {
883 if (ISVOLT(i, data->uch_config)) {
884 data->in[i] = vt8231_read_value(data,
885 regvolt[i]);
886 data->in_min[i] = vt8231_read_value(data,
887 regvoltmin[i]);
888 data->in_max[i] = vt8231_read_value(data,
889 regvoltmax[i]);
890 }
891 }
892 for (i = 0; i < 2; i++) {
893 data->fan[i] = vt8231_read_value(data,
894 VT8231_REG_FAN(i));
895 data->fan_min[i] = vt8231_read_value(data,
896 VT8231_REG_FAN_MIN(i));
897 }
898
899 low = vt8231_read_value(data, VT8231_REG_TEMP_LOW01);
900 low = (low >> 6) | ((low & 0x30) >> 2)
901 | (vt8231_read_value(data, VT8231_REG_TEMP_LOW25) << 4);
902 for (i = 0; i < 6; i++) {
903 if (ISTEMP(i, data->uch_config)) {
904 data->temp[i] = (vt8231_read_value(data,
905 regtemp[i]) << 2)
906 | ((low >> (2 * i)) & 0x03);
907 data->temp_max[i] = vt8231_read_value(data,
908 regtempmax[i]);
909 data->temp_min[i] = vt8231_read_value(data,
910 regtempmin[i]);
911 }
912 }
913
914 i = vt8231_read_value(data, VT8231_REG_FANDIV);
915 data->fan_div[0] = (i >> 4) & 0x03;
916 data->fan_div[1] = i >> 6;
917 data->alarms = vt8231_read_value(data, VT8231_REG_ALARM1) |
918 (vt8231_read_value(data, VT8231_REG_ALARM2) << 8);
919
920 /* Set alarm flags correctly */
921 if (!data->fan[0] && data->fan_min[0])
922 data->alarms |= 0x40;
923 else if (data->fan[0] && !data->fan_min[0])
924 data->alarms &= ~0x40;
925
926 if (!data->fan[1] && data->fan_min[1])
927 data->alarms |= 0x80;
928 else if (data->fan[1] && !data->fan_min[1])
929 data->alarms &= ~0x80;
930
931 data->last_updated = jiffies;
932 data->valid = 1;
933 }
934
935 mutex_unlock(&data->update_lock);
936
937 return data;
938}
939
940static int vt8231_device_add(unsigned short address)
941{
942 struct resource res = {
943 .start = address,
944 .end = address + VT8231_EXTENT - 1,
945 .name = "vt8231",
946 .flags = IORESOURCE_IO,
947 };
948 int err;
949
950 err = acpi_check_resource_conflict(&res);
951 if (err)
952 goto exit;
953
954 pdev = platform_device_alloc("vt8231", address);
955 if (!pdev) {
956 err = -ENOMEM;
957 pr_err("Device allocation failed\n");
958 goto exit;
959 }
960
961 err = platform_device_add_resources(pdev, &res, 1);
962 if (err) {
963 pr_err("Device resource addition failed (%d)\n", err);
964 goto exit_device_put;
965 }
966
967 err = platform_device_add(pdev);
968 if (err) {
969 pr_err("Device addition failed (%d)\n", err);
970 goto exit_device_put;
971 }
972
973 return 0;
974
975exit_device_put:
976 platform_device_put(pdev);
977exit:
978 return err;
979}
980
981static int vt8231_pci_probe(struct pci_dev *dev,
982 const struct pci_device_id *id)
983{
984 u16 address, val;
985 if (force_addr) {
986 address = force_addr & 0xff00;
987 dev_warn(&dev->dev, "Forcing ISA address 0x%x\n",
988 address);
989
990 if (PCIBIOS_SUCCESSFUL !=
991 pci_write_config_word(dev, VT8231_BASE_REG, address | 1))
992 return -ENODEV;
993 }
994
995 pci_read_config_word(dev, VT8231_BASE_REG, &val);
996 if (val == (u16)~0)
997 return -ENODEV;
998
999 address = val & ~(VT8231_EXTENT - 1);
1000 if (address == 0) {
1001 dev_err(&dev->dev, "base address not set - upgrade BIOS or use force_addr=0xaddr\n");
1002 return -ENODEV;
1003 }
1004
1005 pci_read_config_word(dev, VT8231_ENABLE_REG, &val);
1006 if (val == (u16)~0)
1007 return -ENODEV;
1008
1009 if (!(val & 0x0001)) {
1010 dev_warn(&dev->dev, "enabling sensors\n");
1011 if (PCIBIOS_SUCCESSFUL !=
1012 pci_write_config_word(dev, VT8231_ENABLE_REG,
1013 val | 0x0001))
1014 return -ENODEV;
1015 }
1016
1017 if (platform_driver_register(&vt8231_driver))
1018 goto exit;
1019
1020 /* Sets global pdev as a side effect */
1021 if (vt8231_device_add(address))
1022 goto exit_unregister;
1023
1024 /*
1025 * Always return failure here. This is to allow other drivers to bind
1026 * to this pci device. We don't really want to have control over the
1027 * pci device, we only wanted to read as few register values from it.
1028 */
1029
1030 /*
1031 * We do, however, mark ourselves as using the PCI device to stop it
1032 * getting unloaded.
1033 */
1034 s_bridge = pci_dev_get(dev);
1035 return -ENODEV;
1036
1037exit_unregister:
1038 platform_driver_unregister(&vt8231_driver);
1039exit:
1040 return -ENODEV;
1041}
1042
1043static int __init sm_vt8231_init(void)
1044{
1045 return pci_register_driver(&vt8231_pci_driver);
1046}
1047
1048static void __exit sm_vt8231_exit(void)
1049{
1050 pci_unregister_driver(&vt8231_pci_driver);
1051 if (s_bridge != NULL) {
1052 platform_device_unregister(pdev);
1053 platform_driver_unregister(&vt8231_driver);
1054 pci_dev_put(s_bridge);
1055 s_bridge = NULL;
1056 }
1057}
1058
1059MODULE_AUTHOR("Roger Lucas <vt8231@hiddenengine.co.uk>");
1060MODULE_DESCRIPTION("VT8231 sensors");
1061MODULE_LICENSE("GPL");
1062
1063module_init(sm_vt8231_init);
1064module_exit(sm_vt8231_exit);
1/*
2 * vt8231.c - Part of lm_sensors, Linux kernel modules
3 * for hardware monitoring
4 *
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>
8 *
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.
13 *
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.
18 *
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.
22 */
23
24/*
25 * Supports VIA VT8231 South Bridge embedded sensors
26 */
27
28#define pr_fmt(fmt) KBUILD_MODNAME ": " fmt
29
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>
42#include <linux/io.h>
43
44static int force_addr;
45module_param(force_addr, int, 0);
46MODULE_PARM_DESC(force_addr, "Initialize the base address of the sensors");
47
48static struct platform_device *pdev;
49
50#define VT8231_EXTENT 0x80
51#define VT8231_BASE_REG 0x70
52#define VT8231_ENABLE_REG 0x74
53
54/*
55 * The VT8231 registers
56 *
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
59 * possible:
60 *
61 * Voltage Mode Temperature Mode
62 * Sensor Linux Id Linux Id VIA Id
63 * -------- -------- -------- ------
64 * CPU Diode N/A temp1 0
65 * UIC1 in0 temp2 * 1
66 * UIC2 in1 * temp3 2
67 * UIC3 in2 * temp4 3
68 * UIC4 in3 * temp5 4
69 * UIC5 in4 * temp6 5
70 * 3.3V in5 N/A
71 *
72 * Note that the BIOS may set the configuration register to a different value
73 * to match the motherboard configuration.
74 */
75
76/* fans numbered 0-1 */
77#define VT8231_REG_FAN_MIN(nr) (0x3b + (nr))
78#define VT8231_REG_FAN(nr) (0x29 + (nr))
79
80/* Voltage inputs numbered 0-5 */
81
82static const u8 regvolt[] = { 0x21, 0x22, 0x23, 0x24, 0x25, 0x26 };
83static const u8 regvoltmax[] = { 0x3d, 0x2b, 0x2d, 0x2f, 0x31, 0x33 };
84static const u8 regvoltmin[] = { 0x3e, 0x2c, 0x2e, 0x30, 0x32, 0x34 };
85
86/*
87 * Temperatures are numbered 1-6 according to the Linux kernel specification.
88 *
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.
93 */
94
95#define VT8231_REG_TEMP_LOW01 0x49
96#define VT8231_REG_TEMP_LOW25 0x4d
97
98static const u8 regtemp[] = { 0x1f, 0x21, 0x22, 0x23, 0x24, 0x25 };
99static const u8 regtempmax[] = { 0x39, 0x3d, 0x2b, 0x2d, 0x2f, 0x31 };
100static const u8 regtempmin[] = { 0x3a, 0x3e, 0x2c, 0x2e, 0x30, 0x32 };
101
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)
105
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
113
114/*
115 * temps 0-5 as numbered in VIA datasheet - see later for mapping to Linux
116 * numbering
117 */
118#define ISTEMP(i, ch_config) ((i) == 0 ? 1 : \
119 ((ch_config) >> ((i)+1)) & 0x01)
120/* voltages 0-5 */
121#define ISVOLT(i, ch_config) ((i) == 5 ? 1 : \
122 !(((ch_config) >> ((i)+2)) & 0x01))
123
124#define DIV_FROM_REG(val) (1 << (val))
125
126/*
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.
134 *
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
138 * ignored.
139 */
140
141/*
142 ****** FAN RPM CONVERSIONS ********
143 * This chip saturates back at 0, not at 255 like many the other chips.
144 * So, 0 means 0 RPM
145 */
146static inline u8 FAN_TO_REG(long rpm, int div)
147{
148 if (rpm == 0)
149 return 0;
150 return SENSORS_LIMIT(1310720 / (rpm * div), 1, 255);
151}
152
153#define FAN_FROM_REG(val, div) ((val) == 0 ? 0 : 1310720 / ((val) * (div)))
154
155struct vt8231_data {
156 unsigned short addr;
157 const char *name;
158
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 */
163
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 */
174 u8 uch_config;
175};
176
177static struct pci_dev *s_bridge;
178static int vt8231_probe(struct platform_device *pdev);
179static int __devexit vt8231_remove(struct platform_device *pdev);
180static struct vt8231_data *vt8231_update_device(struct device *dev);
181static void vt8231_init_device(struct vt8231_data *data);
182
183static inline int vt8231_read_value(struct vt8231_data *data, u8 reg)
184{
185 return inb_p(data->addr + reg);
186}
187
188static inline void vt8231_write_value(struct vt8231_data *data, u8 reg,
189 u8 value)
190{
191 outb_p(value, data->addr + reg);
192}
193
194/* following are the sysfs callback functions */
195static ssize_t show_in(struct device *dev, struct device_attribute *attr,
196 char *buf)
197{
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);
201
202 return sprintf(buf, "%d\n", ((data->in[nr] - 3) * 10000) / 958);
203}
204
205static ssize_t show_in_min(struct device *dev, struct device_attribute *attr,
206 char *buf)
207{
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);
211
212 return sprintf(buf, "%d\n", ((data->in_min[nr] - 3) * 10000) / 958);
213}
214
215static ssize_t show_in_max(struct device *dev, struct device_attribute *attr,
216 char *buf)
217{
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);
221
222 return sprintf(buf, "%d\n", (((data->in_max[nr] - 3) * 10000) / 958));
223}
224
225static ssize_t set_in_min(struct device *dev, struct device_attribute *attr,
226 const char *buf, size_t count)
227{
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);
231 unsigned long val;
232 int err;
233
234 err = kstrtoul(buf, 10, &val);
235 if (err)
236 return err;
237
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);
242 return count;
243}
244
245static ssize_t set_in_max(struct device *dev, struct device_attribute *attr,
246 const char *buf, size_t count)
247{
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);
251 unsigned long val;
252 int err;
253
254 err = kstrtoul(buf, 10, &val);
255 if (err)
256 return err;
257
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);
262 return count;
263}
264
265/* Special case for input 5 as this has 3.3V scaling built into the chip */
266static ssize_t show_in5(struct device *dev, struct device_attribute *attr,
267 char *buf)
268{
269 struct vt8231_data *data = vt8231_update_device(dev);
270
271 return sprintf(buf, "%d\n",
272 (((data->in[5] - 3) * 10000 * 54) / (958 * 34)));
273}
274
275static ssize_t show_in5_min(struct device *dev, struct device_attribute *attr,
276 char *buf)
277{
278 struct vt8231_data *data = vt8231_update_device(dev);
279
280 return sprintf(buf, "%d\n",
281 (((data->in_min[5] - 3) * 10000 * 54) / (958 * 34)));
282}
283
284static ssize_t show_in5_max(struct device *dev, struct device_attribute *attr,
285 char *buf)
286{
287 struct vt8231_data *data = vt8231_update_device(dev);
288
289 return sprintf(buf, "%d\n",
290 (((data->in_max[5] - 3) * 10000 * 54) / (958 * 34)));
291}
292
293static ssize_t set_in5_min(struct device *dev, struct device_attribute *attr,
294 const char *buf, size_t count)
295{
296 struct vt8231_data *data = dev_get_drvdata(dev);
297 unsigned long val;
298 int err;
299
300 err = kstrtoul(buf, 10, &val);
301 if (err)
302 return err;
303
304 mutex_lock(&data->update_lock);
305 data->in_min[5] = SENSORS_LIMIT(((val * 958 * 34) / (10000 * 54)) + 3,
306 0, 255);
307 vt8231_write_value(data, regvoltmin[5], data->in_min[5]);
308 mutex_unlock(&data->update_lock);
309 return count;
310}
311
312static ssize_t set_in5_max(struct device *dev, struct device_attribute *attr,
313 const char *buf, size_t count)
314{
315 struct vt8231_data *data = dev_get_drvdata(dev);
316 unsigned long val;
317 int err;
318
319 err = kstrtoul(buf, 10, &val);
320 if (err)
321 return err;
322
323 mutex_lock(&data->update_lock);
324 data->in_max[5] = SENSORS_LIMIT(((val * 958 * 34) / (10000 * 54)) + 3,
325 0, 255);
326 vt8231_write_value(data, regvoltmax[5], data->in_max[5]);
327 mutex_unlock(&data->update_lock);
328 return count;
329}
330
331#define define_voltage_sysfs(offset) \
332static SENSOR_DEVICE_ATTR(in##offset##_input, S_IRUGO, \
333 show_in, NULL, offset); \
334static SENSOR_DEVICE_ATTR(in##offset##_min, S_IRUGO | S_IWUSR, \
335 show_in_min, set_in_min, offset); \
336static SENSOR_DEVICE_ATTR(in##offset##_max, S_IRUGO | S_IWUSR, \
337 show_in_max, set_in_max, offset)
338
339define_voltage_sysfs(0);
340define_voltage_sysfs(1);
341define_voltage_sysfs(2);
342define_voltage_sysfs(3);
343define_voltage_sysfs(4);
344
345static DEVICE_ATTR(in5_input, S_IRUGO, show_in5, NULL);
346static DEVICE_ATTR(in5_min, S_IRUGO | S_IWUSR, show_in5_min, set_in5_min);
347static DEVICE_ATTR(in5_max, S_IRUGO | S_IWUSR, show_in5_max, set_in5_max);
348
349/* Temperatures */
350static ssize_t show_temp0(struct device *dev, struct device_attribute *attr,
351 char *buf)
352{
353 struct vt8231_data *data = vt8231_update_device(dev);
354 return sprintf(buf, "%d\n", data->temp[0] * 250);
355}
356
357static ssize_t show_temp0_max(struct device *dev, struct device_attribute *attr,
358 char *buf)
359{
360 struct vt8231_data *data = vt8231_update_device(dev);
361 return sprintf(buf, "%d\n", data->temp_max[0] * 1000);
362}
363
364static ssize_t show_temp0_min(struct device *dev, struct device_attribute *attr,
365 char *buf)
366{
367 struct vt8231_data *data = vt8231_update_device(dev);
368 return sprintf(buf, "%d\n", data->temp_min[0] * 1000);
369}
370
371static ssize_t set_temp0_max(struct device *dev, struct device_attribute *attr,
372 const char *buf, size_t count)
373{
374 struct vt8231_data *data = dev_get_drvdata(dev);
375 long val;
376 int err;
377
378 err = kstrtol(buf, 10, &val);
379 if (err)
380 return err;
381
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);
386 return count;
387}
388static ssize_t set_temp0_min(struct device *dev, struct device_attribute *attr,
389 const char *buf, size_t count)
390{
391 struct vt8231_data *data = dev_get_drvdata(dev);
392 long val;
393 int err;
394
395 err = kstrtol(buf, 10, &val);
396 if (err)
397 return err;
398
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);
403 return count;
404}
405
406static ssize_t show_temp(struct device *dev, struct device_attribute *attr,
407 char *buf)
408{
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]));
413}
414
415static ssize_t show_temp_max(struct device *dev, struct device_attribute *attr,
416 char *buf)
417{
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]));
422}
423
424static ssize_t show_temp_min(struct device *dev, struct device_attribute *attr,
425 char *buf)
426{
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]));
431}
432
433static ssize_t set_temp_max(struct device *dev, struct device_attribute *attr,
434 const char *buf, size_t count)
435{
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);
439 long val;
440 int err;
441
442 err = kstrtol(buf, 10, &val);
443 if (err)
444 return err;
445
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);
450 return count;
451}
452static ssize_t set_temp_min(struct device *dev, struct device_attribute *attr,
453 const char *buf, size_t count)
454{
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);
458 long val;
459 int err;
460
461 err = kstrtol(buf, 10, &val);
462 if (err)
463 return err;
464
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);
469 return count;
470}
471
472/*
473 * Note that these map the Linux temperature sensor numbering (1-6) to the VIA
474 * temperature sensor numbering (0-5)
475 */
476#define define_temperature_sysfs(offset) \
477static SENSOR_DEVICE_ATTR(temp##offset##_input, S_IRUGO, \
478 show_temp, NULL, offset - 1); \
479static SENSOR_DEVICE_ATTR(temp##offset##_max, S_IRUGO | S_IWUSR, \
480 show_temp_max, set_temp_max, offset - 1); \
481static SENSOR_DEVICE_ATTR(temp##offset##_max_hyst, S_IRUGO | S_IWUSR, \
482 show_temp_min, set_temp_min, offset - 1)
483
484static DEVICE_ATTR(temp1_input, S_IRUGO, show_temp0, NULL);
485static DEVICE_ATTR(temp1_max, S_IRUGO | S_IWUSR, show_temp0_max, set_temp0_max);
486static DEVICE_ATTR(temp1_max_hyst, S_IRUGO | S_IWUSR, show_temp0_min,
487 set_temp0_min);
488
489define_temperature_sysfs(2);
490define_temperature_sysfs(3);
491define_temperature_sysfs(4);
492define_temperature_sysfs(5);
493define_temperature_sysfs(6);
494
495/* Fans */
496static ssize_t show_fan(struct device *dev, struct device_attribute *attr,
497 char *buf)
498{
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])));
504}
505
506static ssize_t show_fan_min(struct device *dev, struct device_attribute *attr,
507 char *buf)
508{
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])));
514}
515
516static ssize_t show_fan_div(struct device *dev, struct device_attribute *attr,
517 char *buf)
518{
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]));
523}
524
525static ssize_t set_fan_min(struct device *dev, struct device_attribute *attr,
526 const char *buf, size_t count)
527{
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);
531 unsigned long val;
532 int err;
533
534 err = kstrtoul(buf, 10, &val);
535 if (err)
536 return err;
537
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);
542 return count;
543}
544
545static ssize_t set_fan_div(struct device *dev, struct device_attribute *attr,
546 const char *buf, size_t count)
547{
548 struct vt8231_data *data = dev_get_drvdata(dev);
549 struct sensor_device_attribute *sensor_attr = to_sensor_dev_attr(attr);
550 unsigned long val;
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]));
555 int err;
556
557 err = kstrtoul(buf, 10, &val);
558 if (err)
559 return err;
560
561 mutex_lock(&data->update_lock);
562 switch (val) {
563 case 1:
564 data->fan_div[nr] = 0;
565 break;
566 case 2:
567 data->fan_div[nr] = 1;
568 break;
569 case 4:
570 data->fan_div[nr] = 2;
571 break;
572 case 8:
573 data->fan_div[nr] = 3;
574 break;
575 default:
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);
579 return -EINVAL;
580 }
581
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]);
585
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);
589 return count;
590}
591
592
593#define define_fan_sysfs(offset) \
594static SENSOR_DEVICE_ATTR(fan##offset##_input, S_IRUGO, \
595 show_fan, NULL, offset - 1); \
596static SENSOR_DEVICE_ATTR(fan##offset##_div, S_IRUGO | S_IWUSR, \
597 show_fan_div, set_fan_div, offset - 1); \
598static SENSOR_DEVICE_ATTR(fan##offset##_min, S_IRUGO | S_IWUSR, \
599 show_fan_min, set_fan_min, offset - 1)
600
601define_fan_sysfs(1);
602define_fan_sysfs(2);
603
604/* Alarms */
605static ssize_t show_alarms(struct device *dev, struct device_attribute *attr,
606 char *buf)
607{
608 struct vt8231_data *data = vt8231_update_device(dev);
609 return sprintf(buf, "%d\n", data->alarms);
610}
611static DEVICE_ATTR(alarms, S_IRUGO, show_alarms, NULL);
612
613static ssize_t show_alarm(struct device *dev, struct device_attribute *attr,
614 char *buf)
615{
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);
619}
620static SENSOR_DEVICE_ATTR(temp1_alarm, S_IRUGO, show_alarm, NULL, 4);
621static SENSOR_DEVICE_ATTR(temp2_alarm, S_IRUGO, show_alarm, NULL, 11);
622static SENSOR_DEVICE_ATTR(temp3_alarm, S_IRUGO, show_alarm, NULL, 0);
623static SENSOR_DEVICE_ATTR(temp4_alarm, S_IRUGO, show_alarm, NULL, 1);
624static SENSOR_DEVICE_ATTR(temp5_alarm, S_IRUGO, show_alarm, NULL, 3);
625static SENSOR_DEVICE_ATTR(temp6_alarm, S_IRUGO, show_alarm, NULL, 8);
626static SENSOR_DEVICE_ATTR(in0_alarm, S_IRUGO, show_alarm, NULL, 11);
627static SENSOR_DEVICE_ATTR(in1_alarm, S_IRUGO, show_alarm, NULL, 0);
628static SENSOR_DEVICE_ATTR(in2_alarm, S_IRUGO, show_alarm, NULL, 1);
629static SENSOR_DEVICE_ATTR(in3_alarm, S_IRUGO, show_alarm, NULL, 3);
630static SENSOR_DEVICE_ATTR(in4_alarm, S_IRUGO, show_alarm, NULL, 8);
631static SENSOR_DEVICE_ATTR(in5_alarm, S_IRUGO, show_alarm, NULL, 2);
632static SENSOR_DEVICE_ATTR(fan1_alarm, S_IRUGO, show_alarm, NULL, 6);
633static SENSOR_DEVICE_ATTR(fan2_alarm, S_IRUGO, show_alarm, NULL, 7);
634
635static ssize_t show_name(struct device *dev, struct device_attribute
636 *devattr, char *buf)
637{
638 struct vt8231_data *data = dev_get_drvdata(dev);
639 return sprintf(buf, "%s\n", data->name);
640}
641static DEVICE_ATTR(name, S_IRUGO, show_name, NULL);
642
643static struct attribute *vt8231_attributes_temps[6][5] = {
644 {
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,
649 NULL
650 }, {
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,
655 NULL
656 }, {
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,
661 NULL
662 }, {
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,
667 NULL
668 }, {
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,
673 NULL
674 }, {
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,
679 NULL
680 }
681};
682
683static 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] },
690};
691
692static struct attribute *vt8231_attributes_volts[6][5] = {
693 {
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,
698 NULL
699 }, {
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,
704 NULL
705 }, {
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,
710 NULL
711 }, {
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,
716 NULL
717 }, {
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,
722 NULL
723 }, {
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,
728 NULL
729 }
730};
731
732static 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] },
739};
740
741static 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,
751 &dev_attr_name.attr,
752 NULL
753};
754
755static const struct attribute_group vt8231_group = {
756 .attrs = vt8231_attributes,
757};
758
759static struct platform_driver vt8231_driver = {
760 .driver = {
761 .owner = THIS_MODULE,
762 .name = "vt8231",
763 },
764 .probe = vt8231_probe,
765 .remove = __devexit_p(vt8231_remove),
766};
767
768static DEFINE_PCI_DEVICE_TABLE(vt8231_pci_ids) = {
769 { PCI_DEVICE(PCI_VENDOR_ID_VIA, PCI_DEVICE_ID_VIA_8231_4) },
770 { 0, }
771};
772
773MODULE_DEVICE_TABLE(pci, vt8231_pci_ids);
774
775static int __devinit vt8231_pci_probe(struct pci_dev *dev,
776 const struct pci_device_id *id);
777
778static struct pci_driver vt8231_pci_driver = {
779 .name = "vt8231",
780 .id_table = vt8231_pci_ids,
781 .probe = vt8231_pci_probe,
782};
783
784static int vt8231_probe(struct platform_device *pdev)
785{
786 struct resource *res;
787 struct vt8231_data *data;
788 int err = 0, i;
789
790 /* Reserve the ISA region */
791 res = platform_get_resource(pdev, IORESOURCE_IO, 0);
792 if (!request_region(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);
796 return -ENODEV;
797 }
798
799 data = kzalloc(sizeof(struct vt8231_data), GFP_KERNEL);
800 if (!data) {
801 err = -ENOMEM;
802 goto exit_release;
803 }
804
805 platform_set_drvdata(pdev, data);
806 data->addr = res->start;
807 data->name = "vt8231";
808
809 mutex_init(&data->update_lock);
810 vt8231_init_device(data);
811
812 /* Register sysfs hooks */
813 err = sysfs_create_group(&pdev->dev.kobj, &vt8231_group);
814 if (err)
815 goto exit_free;
816
817 /* Must update device information to find out the config field */
818 data->uch_config = vt8231_read_value(data, VT8231_REG_UCH_CONFIG);
819
820 for (i = 0; i < ARRAY_SIZE(vt8231_group_temps); i++) {
821 if (ISTEMP(i, data->uch_config)) {
822 err = sysfs_create_group(&pdev->dev.kobj,
823 &vt8231_group_temps[i]);
824 if (err)
825 goto exit_remove_files;
826 }
827 }
828
829 for (i = 0; i < ARRAY_SIZE(vt8231_group_volts); i++) {
830 if (ISVOLT(i, data->uch_config)) {
831 err = sysfs_create_group(&pdev->dev.kobj,
832 &vt8231_group_volts[i]);
833 if (err)
834 goto exit_remove_files;
835 }
836 }
837
838 data->hwmon_dev = hwmon_device_register(&pdev->dev);
839 if (IS_ERR(data->hwmon_dev)) {
840 err = PTR_ERR(data->hwmon_dev);
841 goto exit_remove_files;
842 }
843 return 0;
844
845exit_remove_files:
846 for (i = 0; i < ARRAY_SIZE(vt8231_group_volts); i++)
847 sysfs_remove_group(&pdev->dev.kobj, &vt8231_group_volts[i]);
848
849 for (i = 0; i < ARRAY_SIZE(vt8231_group_temps); i++)
850 sysfs_remove_group(&pdev->dev.kobj, &vt8231_group_temps[i]);
851
852 sysfs_remove_group(&pdev->dev.kobj, &vt8231_group);
853
854exit_free:
855 platform_set_drvdata(pdev, NULL);
856 kfree(data);
857
858exit_release:
859 release_region(res->start, VT8231_EXTENT);
860 return err;
861}
862
863static int __devexit vt8231_remove(struct platform_device *pdev)
864{
865 struct vt8231_data *data = platform_get_drvdata(pdev);
866 int i;
867
868 hwmon_device_unregister(data->hwmon_dev);
869
870 for (i = 0; i < ARRAY_SIZE(vt8231_group_volts); i++)
871 sysfs_remove_group(&pdev->dev.kobj, &vt8231_group_volts[i]);
872
873 for (i = 0; i < ARRAY_SIZE(vt8231_group_temps); i++)
874 sysfs_remove_group(&pdev->dev.kobj, &vt8231_group_temps[i]);
875
876 sysfs_remove_group(&pdev->dev.kobj, &vt8231_group);
877
878 release_region(data->addr, VT8231_EXTENT);
879 platform_set_drvdata(pdev, NULL);
880 kfree(data);
881 return 0;
882}
883
884static void vt8231_init_device(struct vt8231_data *data)
885{
886 vt8231_write_value(data, VT8231_REG_TEMP1_CONFIG, 0);
887 vt8231_write_value(data, VT8231_REG_TEMP2_CONFIG, 0);
888}
889
890static struct vt8231_data *vt8231_update_device(struct device *dev)
891{
892 struct vt8231_data *data = dev_get_drvdata(dev);
893 int i;
894 u16 low;
895
896 mutex_lock(&data->update_lock);
897
898 if (time_after(jiffies, data->last_updated + HZ + HZ / 2)
899 || !data->valid) {
900 for (i = 0; i < 6; i++) {
901 if (ISVOLT(i, data->uch_config)) {
902 data->in[i] = vt8231_read_value(data,
903 regvolt[i]);
904 data->in_min[i] = vt8231_read_value(data,
905 regvoltmin[i]);
906 data->in_max[i] = vt8231_read_value(data,
907 regvoltmax[i]);
908 }
909 }
910 for (i = 0; i < 2; i++) {
911 data->fan[i] = vt8231_read_value(data,
912 VT8231_REG_FAN(i));
913 data->fan_min[i] = vt8231_read_value(data,
914 VT8231_REG_FAN_MIN(i));
915 }
916
917 low = vt8231_read_value(data, VT8231_REG_TEMP_LOW01);
918 low = (low >> 6) | ((low & 0x30) >> 2)
919 | (vt8231_read_value(data, VT8231_REG_TEMP_LOW25) << 4);
920 for (i = 0; i < 6; i++) {
921 if (ISTEMP(i, data->uch_config)) {
922 data->temp[i] = (vt8231_read_value(data,
923 regtemp[i]) << 2)
924 | ((low >> (2 * i)) & 0x03);
925 data->temp_max[i] = vt8231_read_value(data,
926 regtempmax[i]);
927 data->temp_min[i] = vt8231_read_value(data,
928 regtempmin[i]);
929 }
930 }
931
932 i = vt8231_read_value(data, VT8231_REG_FANDIV);
933 data->fan_div[0] = (i >> 4) & 0x03;
934 data->fan_div[1] = i >> 6;
935 data->alarms = vt8231_read_value(data, VT8231_REG_ALARM1) |
936 (vt8231_read_value(data, VT8231_REG_ALARM2) << 8);
937
938 /* Set alarm flags correctly */
939 if (!data->fan[0] && data->fan_min[0])
940 data->alarms |= 0x40;
941 else if (data->fan[0] && !data->fan_min[0])
942 data->alarms &= ~0x40;
943
944 if (!data->fan[1] && data->fan_min[1])
945 data->alarms |= 0x80;
946 else if (data->fan[1] && !data->fan_min[1])
947 data->alarms &= ~0x80;
948
949 data->last_updated = jiffies;
950 data->valid = 1;
951 }
952
953 mutex_unlock(&data->update_lock);
954
955 return data;
956}
957
958static int __devinit vt8231_device_add(unsigned short address)
959{
960 struct resource res = {
961 .start = address,
962 .end = address + VT8231_EXTENT - 1,
963 .name = "vt8231",
964 .flags = IORESOURCE_IO,
965 };
966 int err;
967
968 err = acpi_check_resource_conflict(&res);
969 if (err)
970 goto exit;
971
972 pdev = platform_device_alloc("vt8231", address);
973 if (!pdev) {
974 err = -ENOMEM;
975 pr_err("Device allocation failed\n");
976 goto exit;
977 }
978
979 err = platform_device_add_resources(pdev, &res, 1);
980 if (err) {
981 pr_err("Device resource addition failed (%d)\n", err);
982 goto exit_device_put;
983 }
984
985 err = platform_device_add(pdev);
986 if (err) {
987 pr_err("Device addition failed (%d)\n", err);
988 goto exit_device_put;
989 }
990
991 return 0;
992
993exit_device_put:
994 platform_device_put(pdev);
995exit:
996 return err;
997}
998
999static int __devinit vt8231_pci_probe(struct pci_dev *dev,
1000 const struct pci_device_id *id)
1001{
1002 u16 address, val;
1003 if (force_addr) {
1004 address = force_addr & 0xff00;
1005 dev_warn(&dev->dev, "Forcing ISA address 0x%x\n",
1006 address);
1007
1008 if (PCIBIOS_SUCCESSFUL !=
1009 pci_write_config_word(dev, VT8231_BASE_REG, address | 1))
1010 return -ENODEV;
1011 }
1012
1013 if (PCIBIOS_SUCCESSFUL != pci_read_config_word(dev, VT8231_BASE_REG,
1014 &val))
1015 return -ENODEV;
1016
1017 address = val & ~(VT8231_EXTENT - 1);
1018 if (address == 0) {
1019 dev_err(&dev->dev, "base address not set - upgrade BIOS or use force_addr=0xaddr\n");
1020 return -ENODEV;
1021 }
1022
1023 if (PCIBIOS_SUCCESSFUL != pci_read_config_word(dev, VT8231_ENABLE_REG,
1024 &val))
1025 return -ENODEV;
1026
1027 if (!(val & 0x0001)) {
1028 dev_warn(&dev->dev, "enabling sensors\n");
1029 if (PCIBIOS_SUCCESSFUL !=
1030 pci_write_config_word(dev, VT8231_ENABLE_REG,
1031 val | 0x0001))
1032 return -ENODEV;
1033 }
1034
1035 if (platform_driver_register(&vt8231_driver))
1036 goto exit;
1037
1038 /* Sets global pdev as a side effect */
1039 if (vt8231_device_add(address))
1040 goto exit_unregister;
1041
1042 /*
1043 * Always return failure here. This is to allow other drivers to bind
1044 * to this pci device. We don't really want to have control over the
1045 * pci device, we only wanted to read as few register values from it.
1046 */
1047
1048 /*
1049 * We do, however, mark ourselves as using the PCI device to stop it
1050 * getting unloaded.
1051 */
1052 s_bridge = pci_dev_get(dev);
1053 return -ENODEV;
1054
1055exit_unregister:
1056 platform_driver_unregister(&vt8231_driver);
1057exit:
1058 return -ENODEV;
1059}
1060
1061static int __init sm_vt8231_init(void)
1062{
1063 return pci_register_driver(&vt8231_pci_driver);
1064}
1065
1066static void __exit sm_vt8231_exit(void)
1067{
1068 pci_unregister_driver(&vt8231_pci_driver);
1069 if (s_bridge != NULL) {
1070 platform_device_unregister(pdev);
1071 platform_driver_unregister(&vt8231_driver);
1072 pci_dev_put(s_bridge);
1073 s_bridge = NULL;
1074 }
1075}
1076
1077MODULE_AUTHOR("Roger Lucas <vt8231@hiddenengine.co.uk>");
1078MODULE_DESCRIPTION("VT8231 sensors");
1079MODULE_LICENSE("GPL");
1080
1081module_init(sm_vt8231_init);
1082module_exit(sm_vt8231_exit);