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 || rpm > 1310720)
149 return 0;
150 return clamp_val(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 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] = 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);
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] = 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);
262 return count;
263}
264
265/* Special case for input 5 as this has 3.3V scaling built into the chip */
266static ssize_t in5_input_show(struct device *dev,
267 struct device_attribute *attr, 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 in5_min_show(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 in5_max_show(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 in5_min_store(struct device *dev,
294 struct device_attribute *attr, const char *buf,
295 size_t count)
296{
297 struct vt8231_data *data = dev_get_drvdata(dev);
298 unsigned long val;
299 int err;
300
301 err = kstrtoul(buf, 10, &val);
302 if (err)
303 return err;
304
305 mutex_lock(&data->update_lock);
306 data->in_min[5] = clamp_val(((val * 958 * 34) / (10000 * 54)) + 3,
307 0, 255);
308 vt8231_write_value(data, regvoltmin[5], data->in_min[5]);
309 mutex_unlock(&data->update_lock);
310 return count;
311}
312
313static ssize_t in5_max_store(struct device *dev,
314 struct device_attribute *attr, const char *buf,
315 size_t count)
316{
317 struct vt8231_data *data = dev_get_drvdata(dev);
318 unsigned long val;
319 int err;
320
321 err = kstrtoul(buf, 10, &val);
322 if (err)
323 return err;
324
325 mutex_lock(&data->update_lock);
326 data->in_max[5] = clamp_val(((val * 958 * 34) / (10000 * 54)) + 3,
327 0, 255);
328 vt8231_write_value(data, regvoltmax[5], data->in_max[5]);
329 mutex_unlock(&data->update_lock);
330 return count;
331}
332
333#define define_voltage_sysfs(offset) \
334static SENSOR_DEVICE_ATTR(in##offset##_input, S_IRUGO, \
335 show_in, NULL, offset); \
336static SENSOR_DEVICE_ATTR(in##offset##_min, S_IRUGO | S_IWUSR, \
337 show_in_min, set_in_min, offset); \
338static SENSOR_DEVICE_ATTR(in##offset##_max, S_IRUGO | S_IWUSR, \
339 show_in_max, set_in_max, offset)
340
341define_voltage_sysfs(0);
342define_voltage_sysfs(1);
343define_voltage_sysfs(2);
344define_voltage_sysfs(3);
345define_voltage_sysfs(4);
346
347static DEVICE_ATTR_RO(in5_input);
348static DEVICE_ATTR_RW(in5_min);
349static DEVICE_ATTR_RW(in5_max);
350
351/* Temperatures */
352static ssize_t temp1_input_show(struct device *dev,
353 struct device_attribute *attr, char *buf)
354{
355 struct vt8231_data *data = vt8231_update_device(dev);
356 return sprintf(buf, "%d\n", data->temp[0] * 250);
357}
358
359static ssize_t temp1_max_show(struct device *dev, struct device_attribute *attr,
360 char *buf)
361{
362 struct vt8231_data *data = vt8231_update_device(dev);
363 return sprintf(buf, "%d\n", data->temp_max[0] * 1000);
364}
365
366static ssize_t temp1_max_hyst_show(struct device *dev,
367 struct device_attribute *attr, char *buf)
368{
369 struct vt8231_data *data = vt8231_update_device(dev);
370 return sprintf(buf, "%d\n", data->temp_min[0] * 1000);
371}
372
373static ssize_t temp1_max_store(struct device *dev,
374 struct device_attribute *attr, const char *buf,
375 size_t count)
376{
377 struct vt8231_data *data = dev_get_drvdata(dev);
378 long val;
379 int err;
380
381 err = kstrtol(buf, 10, &val);
382 if (err)
383 return err;
384
385 mutex_lock(&data->update_lock);
386 data->temp_max[0] = clamp_val((val + 500) / 1000, 0, 255);
387 vt8231_write_value(data, regtempmax[0], data->temp_max[0]);
388 mutex_unlock(&data->update_lock);
389 return count;
390}
391static ssize_t temp1_max_hyst_store(struct device *dev,
392 struct device_attribute *attr,
393 const char *buf, size_t count)
394{
395 struct vt8231_data *data = dev_get_drvdata(dev);
396 long val;
397 int err;
398
399 err = kstrtol(buf, 10, &val);
400 if (err)
401 return err;
402
403 mutex_lock(&data->update_lock);
404 data->temp_min[0] = clamp_val((val + 500) / 1000, 0, 255);
405 vt8231_write_value(data, regtempmin[0], data->temp_min[0]);
406 mutex_unlock(&data->update_lock);
407 return count;
408}
409
410static ssize_t show_temp(struct device *dev, struct device_attribute *attr,
411 char *buf)
412{
413 struct sensor_device_attribute *sensor_attr = to_sensor_dev_attr(attr);
414 int nr = sensor_attr->index;
415 struct vt8231_data *data = vt8231_update_device(dev);
416 return sprintf(buf, "%d\n", TEMP_FROM_REG(data->temp[nr]));
417}
418
419static ssize_t show_temp_max(struct device *dev, struct device_attribute *attr,
420 char *buf)
421{
422 struct sensor_device_attribute *sensor_attr = to_sensor_dev_attr(attr);
423 int nr = sensor_attr->index;
424 struct vt8231_data *data = vt8231_update_device(dev);
425 return sprintf(buf, "%d\n", TEMP_MAXMIN_FROM_REG(data->temp_max[nr]));
426}
427
428static ssize_t show_temp_min(struct device *dev, struct device_attribute *attr,
429 char *buf)
430{
431 struct sensor_device_attribute *sensor_attr = to_sensor_dev_attr(attr);
432 int nr = sensor_attr->index;
433 struct vt8231_data *data = vt8231_update_device(dev);
434 return sprintf(buf, "%d\n", TEMP_MAXMIN_FROM_REG(data->temp_min[nr]));
435}
436
437static ssize_t set_temp_max(struct device *dev, struct device_attribute *attr,
438 const char *buf, size_t count)
439{
440 struct sensor_device_attribute *sensor_attr = to_sensor_dev_attr(attr);
441 int nr = sensor_attr->index;
442 struct vt8231_data *data = dev_get_drvdata(dev);
443 long val;
444 int err;
445
446 err = kstrtol(buf, 10, &val);
447 if (err)
448 return err;
449
450 mutex_lock(&data->update_lock);
451 data->temp_max[nr] = clamp_val(TEMP_MAXMIN_TO_REG(val), 0, 255);
452 vt8231_write_value(data, regtempmax[nr], data->temp_max[nr]);
453 mutex_unlock(&data->update_lock);
454 return count;
455}
456static ssize_t set_temp_min(struct device *dev, struct device_attribute *attr,
457 const char *buf, size_t count)
458{
459 struct sensor_device_attribute *sensor_attr = to_sensor_dev_attr(attr);
460 int nr = sensor_attr->index;
461 struct vt8231_data *data = dev_get_drvdata(dev);
462 long val;
463 int err;
464
465 err = kstrtol(buf, 10, &val);
466 if (err)
467 return err;
468
469 mutex_lock(&data->update_lock);
470 data->temp_min[nr] = clamp_val(TEMP_MAXMIN_TO_REG(val), 0, 255);
471 vt8231_write_value(data, regtempmin[nr], data->temp_min[nr]);
472 mutex_unlock(&data->update_lock);
473 return count;
474}
475
476/*
477 * Note that these map the Linux temperature sensor numbering (1-6) to the VIA
478 * temperature sensor numbering (0-5)
479 */
480#define define_temperature_sysfs(offset) \
481static SENSOR_DEVICE_ATTR(temp##offset##_input, S_IRUGO, \
482 show_temp, NULL, offset - 1); \
483static SENSOR_DEVICE_ATTR(temp##offset##_max, S_IRUGO | S_IWUSR, \
484 show_temp_max, set_temp_max, offset - 1); \
485static SENSOR_DEVICE_ATTR(temp##offset##_max_hyst, S_IRUGO | S_IWUSR, \
486 show_temp_min, set_temp_min, offset - 1)
487
488static DEVICE_ATTR_RO(temp1_input);
489static DEVICE_ATTR_RW(temp1_max);
490static DEVICE_ATTR_RW(temp1_max_hyst);
491
492define_temperature_sysfs(2);
493define_temperature_sysfs(3);
494define_temperature_sysfs(4);
495define_temperature_sysfs(5);
496define_temperature_sysfs(6);
497
498/* Fans */
499static ssize_t show_fan(struct device *dev, struct device_attribute *attr,
500 char *buf)
501{
502 struct sensor_device_attribute *sensor_attr = to_sensor_dev_attr(attr);
503 int nr = sensor_attr->index;
504 struct vt8231_data *data = vt8231_update_device(dev);
505 return sprintf(buf, "%d\n", FAN_FROM_REG(data->fan[nr],
506 DIV_FROM_REG(data->fan_div[nr])));
507}
508
509static ssize_t show_fan_min(struct device *dev, struct device_attribute *attr,
510 char *buf)
511{
512 struct sensor_device_attribute *sensor_attr = to_sensor_dev_attr(attr);
513 int nr = sensor_attr->index;
514 struct vt8231_data *data = vt8231_update_device(dev);
515 return sprintf(buf, "%d\n", FAN_FROM_REG(data->fan_min[nr],
516 DIV_FROM_REG(data->fan_div[nr])));
517}
518
519static ssize_t show_fan_div(struct device *dev, struct device_attribute *attr,
520 char *buf)
521{
522 struct sensor_device_attribute *sensor_attr = to_sensor_dev_attr(attr);
523 int nr = sensor_attr->index;
524 struct vt8231_data *data = vt8231_update_device(dev);
525 return sprintf(buf, "%d\n", DIV_FROM_REG(data->fan_div[nr]));
526}
527
528static ssize_t set_fan_min(struct device *dev, struct device_attribute *attr,
529 const char *buf, size_t count)
530{
531 struct sensor_device_attribute *sensor_attr = to_sensor_dev_attr(attr);
532 int nr = sensor_attr->index;
533 struct vt8231_data *data = dev_get_drvdata(dev);
534 unsigned long val;
535 int err;
536
537 err = kstrtoul(buf, 10, &val);
538 if (err)
539 return err;
540
541 mutex_lock(&data->update_lock);
542 data->fan_min[nr] = FAN_TO_REG(val, DIV_FROM_REG(data->fan_div[nr]));
543 vt8231_write_value(data, VT8231_REG_FAN_MIN(nr), data->fan_min[nr]);
544 mutex_unlock(&data->update_lock);
545 return count;
546}
547
548static ssize_t set_fan_div(struct device *dev, struct device_attribute *attr,
549 const char *buf, size_t count)
550{
551 struct vt8231_data *data = dev_get_drvdata(dev);
552 struct sensor_device_attribute *sensor_attr = to_sensor_dev_attr(attr);
553 unsigned long val;
554 int nr = sensor_attr->index;
555 int old = vt8231_read_value(data, VT8231_REG_FANDIV);
556 long min = FAN_FROM_REG(data->fan_min[nr],
557 DIV_FROM_REG(data->fan_div[nr]));
558 int err;
559
560 err = kstrtoul(buf, 10, &val);
561 if (err)
562 return err;
563
564 mutex_lock(&data->update_lock);
565 switch (val) {
566 case 1:
567 data->fan_div[nr] = 0;
568 break;
569 case 2:
570 data->fan_div[nr] = 1;
571 break;
572 case 4:
573 data->fan_div[nr] = 2;
574 break;
575 case 8:
576 data->fan_div[nr] = 3;
577 break;
578 default:
579 dev_err(dev,
580 "fan_div value %ld not supported. Choose one of 1, 2, 4 or 8!\n",
581 val);
582 mutex_unlock(&data->update_lock);
583 return -EINVAL;
584 }
585
586 /* Correct the fan minimum speed */
587 data->fan_min[nr] = FAN_TO_REG(min, DIV_FROM_REG(data->fan_div[nr]));
588 vt8231_write_value(data, VT8231_REG_FAN_MIN(nr), data->fan_min[nr]);
589
590 old = (old & 0x0f) | (data->fan_div[1] << 6) | (data->fan_div[0] << 4);
591 vt8231_write_value(data, VT8231_REG_FANDIV, old);
592 mutex_unlock(&data->update_lock);
593 return count;
594}
595
596
597#define define_fan_sysfs(offset) \
598static SENSOR_DEVICE_ATTR(fan##offset##_input, S_IRUGO, \
599 show_fan, NULL, offset - 1); \
600static SENSOR_DEVICE_ATTR(fan##offset##_div, S_IRUGO | S_IWUSR, \
601 show_fan_div, set_fan_div, offset - 1); \
602static SENSOR_DEVICE_ATTR(fan##offset##_min, S_IRUGO | S_IWUSR, \
603 show_fan_min, set_fan_min, offset - 1)
604
605define_fan_sysfs(1);
606define_fan_sysfs(2);
607
608/* Alarms */
609static ssize_t alarms_show(struct device *dev, struct device_attribute *attr,
610 char *buf)
611{
612 struct vt8231_data *data = vt8231_update_device(dev);
613 return sprintf(buf, "%d\n", data->alarms);
614}
615static DEVICE_ATTR_RO(alarms);
616
617static ssize_t show_alarm(struct device *dev, struct device_attribute *attr,
618 char *buf)
619{
620 int bitnr = to_sensor_dev_attr(attr)->index;
621 struct vt8231_data *data = vt8231_update_device(dev);
622 return sprintf(buf, "%u\n", (data->alarms >> bitnr) & 1);
623}
624static SENSOR_DEVICE_ATTR(temp1_alarm, S_IRUGO, show_alarm, NULL, 4);
625static SENSOR_DEVICE_ATTR(temp2_alarm, S_IRUGO, show_alarm, NULL, 11);
626static SENSOR_DEVICE_ATTR(temp3_alarm, S_IRUGO, show_alarm, NULL, 0);
627static SENSOR_DEVICE_ATTR(temp4_alarm, S_IRUGO, show_alarm, NULL, 1);
628static SENSOR_DEVICE_ATTR(temp5_alarm, S_IRUGO, show_alarm, NULL, 3);
629static SENSOR_DEVICE_ATTR(temp6_alarm, S_IRUGO, show_alarm, NULL, 8);
630static SENSOR_DEVICE_ATTR(in0_alarm, S_IRUGO, show_alarm, NULL, 11);
631static SENSOR_DEVICE_ATTR(in1_alarm, S_IRUGO, show_alarm, NULL, 0);
632static SENSOR_DEVICE_ATTR(in2_alarm, S_IRUGO, show_alarm, NULL, 1);
633static SENSOR_DEVICE_ATTR(in3_alarm, S_IRUGO, show_alarm, NULL, 3);
634static SENSOR_DEVICE_ATTR(in4_alarm, S_IRUGO, show_alarm, NULL, 8);
635static SENSOR_DEVICE_ATTR(in5_alarm, S_IRUGO, show_alarm, NULL, 2);
636static SENSOR_DEVICE_ATTR(fan1_alarm, S_IRUGO, show_alarm, NULL, 6);
637static SENSOR_DEVICE_ATTR(fan2_alarm, S_IRUGO, show_alarm, NULL, 7);
638
639static ssize_t name_show(struct device *dev, struct device_attribute
640 *devattr, char *buf)
641{
642 struct vt8231_data *data = dev_get_drvdata(dev);
643 return sprintf(buf, "%s\n", data->name);
644}
645static DEVICE_ATTR_RO(name);
646
647static struct attribute *vt8231_attributes_temps[6][5] = {
648 {
649 &dev_attr_temp1_input.attr,
650 &dev_attr_temp1_max_hyst.attr,
651 &dev_attr_temp1_max.attr,
652 &sensor_dev_attr_temp1_alarm.dev_attr.attr,
653 NULL
654 }, {
655 &sensor_dev_attr_temp2_input.dev_attr.attr,
656 &sensor_dev_attr_temp2_max_hyst.dev_attr.attr,
657 &sensor_dev_attr_temp2_max.dev_attr.attr,
658 &sensor_dev_attr_temp2_alarm.dev_attr.attr,
659 NULL
660 }, {
661 &sensor_dev_attr_temp3_input.dev_attr.attr,
662 &sensor_dev_attr_temp3_max_hyst.dev_attr.attr,
663 &sensor_dev_attr_temp3_max.dev_attr.attr,
664 &sensor_dev_attr_temp3_alarm.dev_attr.attr,
665 NULL
666 }, {
667 &sensor_dev_attr_temp4_input.dev_attr.attr,
668 &sensor_dev_attr_temp4_max_hyst.dev_attr.attr,
669 &sensor_dev_attr_temp4_max.dev_attr.attr,
670 &sensor_dev_attr_temp4_alarm.dev_attr.attr,
671 NULL
672 }, {
673 &sensor_dev_attr_temp5_input.dev_attr.attr,
674 &sensor_dev_attr_temp5_max_hyst.dev_attr.attr,
675 &sensor_dev_attr_temp5_max.dev_attr.attr,
676 &sensor_dev_attr_temp5_alarm.dev_attr.attr,
677 NULL
678 }, {
679 &sensor_dev_attr_temp6_input.dev_attr.attr,
680 &sensor_dev_attr_temp6_max_hyst.dev_attr.attr,
681 &sensor_dev_attr_temp6_max.dev_attr.attr,
682 &sensor_dev_attr_temp6_alarm.dev_attr.attr,
683 NULL
684 }
685};
686
687static const struct attribute_group vt8231_group_temps[6] = {
688 { .attrs = vt8231_attributes_temps[0] },
689 { .attrs = vt8231_attributes_temps[1] },
690 { .attrs = vt8231_attributes_temps[2] },
691 { .attrs = vt8231_attributes_temps[3] },
692 { .attrs = vt8231_attributes_temps[4] },
693 { .attrs = vt8231_attributes_temps[5] },
694};
695
696static struct attribute *vt8231_attributes_volts[6][5] = {
697 {
698 &sensor_dev_attr_in0_input.dev_attr.attr,
699 &sensor_dev_attr_in0_min.dev_attr.attr,
700 &sensor_dev_attr_in0_max.dev_attr.attr,
701 &sensor_dev_attr_in0_alarm.dev_attr.attr,
702 NULL
703 }, {
704 &sensor_dev_attr_in1_input.dev_attr.attr,
705 &sensor_dev_attr_in1_min.dev_attr.attr,
706 &sensor_dev_attr_in1_max.dev_attr.attr,
707 &sensor_dev_attr_in1_alarm.dev_attr.attr,
708 NULL
709 }, {
710 &sensor_dev_attr_in2_input.dev_attr.attr,
711 &sensor_dev_attr_in2_min.dev_attr.attr,
712 &sensor_dev_attr_in2_max.dev_attr.attr,
713 &sensor_dev_attr_in2_alarm.dev_attr.attr,
714 NULL
715 }, {
716 &sensor_dev_attr_in3_input.dev_attr.attr,
717 &sensor_dev_attr_in3_min.dev_attr.attr,
718 &sensor_dev_attr_in3_max.dev_attr.attr,
719 &sensor_dev_attr_in3_alarm.dev_attr.attr,
720 NULL
721 }, {
722 &sensor_dev_attr_in4_input.dev_attr.attr,
723 &sensor_dev_attr_in4_min.dev_attr.attr,
724 &sensor_dev_attr_in4_max.dev_attr.attr,
725 &sensor_dev_attr_in4_alarm.dev_attr.attr,
726 NULL
727 }, {
728 &dev_attr_in5_input.attr,
729 &dev_attr_in5_min.attr,
730 &dev_attr_in5_max.attr,
731 &sensor_dev_attr_in5_alarm.dev_attr.attr,
732 NULL
733 }
734};
735
736static const struct attribute_group vt8231_group_volts[6] = {
737 { .attrs = vt8231_attributes_volts[0] },
738 { .attrs = vt8231_attributes_volts[1] },
739 { .attrs = vt8231_attributes_volts[2] },
740 { .attrs = vt8231_attributes_volts[3] },
741 { .attrs = vt8231_attributes_volts[4] },
742 { .attrs = vt8231_attributes_volts[5] },
743};
744
745static struct attribute *vt8231_attributes[] = {
746 &sensor_dev_attr_fan1_input.dev_attr.attr,
747 &sensor_dev_attr_fan2_input.dev_attr.attr,
748 &sensor_dev_attr_fan1_min.dev_attr.attr,
749 &sensor_dev_attr_fan2_min.dev_attr.attr,
750 &sensor_dev_attr_fan1_div.dev_attr.attr,
751 &sensor_dev_attr_fan2_div.dev_attr.attr,
752 &sensor_dev_attr_fan1_alarm.dev_attr.attr,
753 &sensor_dev_attr_fan2_alarm.dev_attr.attr,
754 &dev_attr_alarms.attr,
755 &dev_attr_name.attr,
756 NULL
757};
758
759static const struct attribute_group vt8231_group = {
760 .attrs = vt8231_attributes,
761};
762
763static struct platform_driver vt8231_driver = {
764 .driver = {
765 .name = "vt8231",
766 },
767 .probe = vt8231_probe,
768 .remove = vt8231_remove,
769};
770
771static const struct pci_device_id vt8231_pci_ids[] = {
772 { PCI_DEVICE(PCI_VENDOR_ID_VIA, PCI_DEVICE_ID_VIA_8231_4) },
773 { 0, }
774};
775
776MODULE_DEVICE_TABLE(pci, vt8231_pci_ids);
777
778static int vt8231_pci_probe(struct pci_dev *dev,
779 const struct pci_device_id *id);
780
781static struct pci_driver vt8231_pci_driver = {
782 .name = "vt8231",
783 .id_table = vt8231_pci_ids,
784 .probe = vt8231_pci_probe,
785};
786
787static int vt8231_probe(struct platform_device *pdev)
788{
789 struct resource *res;
790 struct vt8231_data *data;
791 int err = 0, i;
792
793 /* Reserve the ISA region */
794 res = platform_get_resource(pdev, IORESOURCE_IO, 0);
795 if (!devm_request_region(&pdev->dev, res->start, VT8231_EXTENT,
796 vt8231_driver.driver.name)) {
797 dev_err(&pdev->dev, "Region 0x%lx-0x%lx already in use!\n",
798 (unsigned long)res->start, (unsigned long)res->end);
799 return -ENODEV;
800 }
801
802 data = devm_kzalloc(&pdev->dev, sizeof(struct vt8231_data), GFP_KERNEL);
803 if (!data)
804 return -ENOMEM;
805
806 platform_set_drvdata(pdev, data);
807 data->addr = res->start;
808 data->name = "vt8231";
809
810 mutex_init(&data->update_lock);
811 vt8231_init_device(data);
812
813 /* Register sysfs hooks */
814 err = sysfs_create_group(&pdev->dev.kobj, &vt8231_group);
815 if (err)
816 return err;
817
818 /* Must update device information to find out the config field */
819 data->uch_config = vt8231_read_value(data, VT8231_REG_UCH_CONFIG);
820
821 for (i = 0; i < ARRAY_SIZE(vt8231_group_temps); i++) {
822 if (ISTEMP(i, data->uch_config)) {
823 err = sysfs_create_group(&pdev->dev.kobj,
824 &vt8231_group_temps[i]);
825 if (err)
826 goto exit_remove_files;
827 }
828 }
829
830 for (i = 0; i < ARRAY_SIZE(vt8231_group_volts); i++) {
831 if (ISVOLT(i, data->uch_config)) {
832 err = sysfs_create_group(&pdev->dev.kobj,
833 &vt8231_group_volts[i]);
834 if (err)
835 goto exit_remove_files;
836 }
837 }
838
839 data->hwmon_dev = hwmon_device_register(&pdev->dev);
840 if (IS_ERR(data->hwmon_dev)) {
841 err = PTR_ERR(data->hwmon_dev);
842 goto exit_remove_files;
843 }
844 return 0;
845
846exit_remove_files:
847 for (i = 0; i < ARRAY_SIZE(vt8231_group_volts); i++)
848 sysfs_remove_group(&pdev->dev.kobj, &vt8231_group_volts[i]);
849
850 for (i = 0; i < ARRAY_SIZE(vt8231_group_temps); i++)
851 sysfs_remove_group(&pdev->dev.kobj, &vt8231_group_temps[i]);
852
853 sysfs_remove_group(&pdev->dev.kobj, &vt8231_group);
854 return err;
855}
856
857static int vt8231_remove(struct platform_device *pdev)
858{
859 struct vt8231_data *data = platform_get_drvdata(pdev);
860 int i;
861
862 hwmon_device_unregister(data->hwmon_dev);
863
864 for (i = 0; i < ARRAY_SIZE(vt8231_group_volts); i++)
865 sysfs_remove_group(&pdev->dev.kobj, &vt8231_group_volts[i]);
866
867 for (i = 0; i < ARRAY_SIZE(vt8231_group_temps); i++)
868 sysfs_remove_group(&pdev->dev.kobj, &vt8231_group_temps[i]);
869
870 sysfs_remove_group(&pdev->dev.kobj, &vt8231_group);
871
872 return 0;
873}
874
875static void vt8231_init_device(struct vt8231_data *data)
876{
877 vt8231_write_value(data, VT8231_REG_TEMP1_CONFIG, 0);
878 vt8231_write_value(data, VT8231_REG_TEMP2_CONFIG, 0);
879}
880
881static struct vt8231_data *vt8231_update_device(struct device *dev)
882{
883 struct vt8231_data *data = dev_get_drvdata(dev);
884 int i;
885 u16 low;
886
887 mutex_lock(&data->update_lock);
888
889 if (time_after(jiffies, data->last_updated + HZ + HZ / 2)
890 || !data->valid) {
891 for (i = 0; i < 6; i++) {
892 if (ISVOLT(i, data->uch_config)) {
893 data->in[i] = vt8231_read_value(data,
894 regvolt[i]);
895 data->in_min[i] = vt8231_read_value(data,
896 regvoltmin[i]);
897 data->in_max[i] = vt8231_read_value(data,
898 regvoltmax[i]);
899 }
900 }
901 for (i = 0; i < 2; i++) {
902 data->fan[i] = vt8231_read_value(data,
903 VT8231_REG_FAN(i));
904 data->fan_min[i] = vt8231_read_value(data,
905 VT8231_REG_FAN_MIN(i));
906 }
907
908 low = vt8231_read_value(data, VT8231_REG_TEMP_LOW01);
909 low = (low >> 6) | ((low & 0x30) >> 2)
910 | (vt8231_read_value(data, VT8231_REG_TEMP_LOW25) << 4);
911 for (i = 0; i < 6; i++) {
912 if (ISTEMP(i, data->uch_config)) {
913 data->temp[i] = (vt8231_read_value(data,
914 regtemp[i]) << 2)
915 | ((low >> (2 * i)) & 0x03);
916 data->temp_max[i] = vt8231_read_value(data,
917 regtempmax[i]);
918 data->temp_min[i] = vt8231_read_value(data,
919 regtempmin[i]);
920 }
921 }
922
923 i = vt8231_read_value(data, VT8231_REG_FANDIV);
924 data->fan_div[0] = (i >> 4) & 0x03;
925 data->fan_div[1] = i >> 6;
926 data->alarms = vt8231_read_value(data, VT8231_REG_ALARM1) |
927 (vt8231_read_value(data, VT8231_REG_ALARM2) << 8);
928
929 /* Set alarm flags correctly */
930 if (!data->fan[0] && data->fan_min[0])
931 data->alarms |= 0x40;
932 else if (data->fan[0] && !data->fan_min[0])
933 data->alarms &= ~0x40;
934
935 if (!data->fan[1] && data->fan_min[1])
936 data->alarms |= 0x80;
937 else if (data->fan[1] && !data->fan_min[1])
938 data->alarms &= ~0x80;
939
940 data->last_updated = jiffies;
941 data->valid = 1;
942 }
943
944 mutex_unlock(&data->update_lock);
945
946 return data;
947}
948
949static int vt8231_device_add(unsigned short address)
950{
951 struct resource res = {
952 .start = address,
953 .end = address + VT8231_EXTENT - 1,
954 .name = "vt8231",
955 .flags = IORESOURCE_IO,
956 };
957 int err;
958
959 err = acpi_check_resource_conflict(&res);
960 if (err)
961 goto exit;
962
963 pdev = platform_device_alloc("vt8231", address);
964 if (!pdev) {
965 err = -ENOMEM;
966 pr_err("Device allocation failed\n");
967 goto exit;
968 }
969
970 err = platform_device_add_resources(pdev, &res, 1);
971 if (err) {
972 pr_err("Device resource addition failed (%d)\n", err);
973 goto exit_device_put;
974 }
975
976 err = platform_device_add(pdev);
977 if (err) {
978 pr_err("Device addition failed (%d)\n", err);
979 goto exit_device_put;
980 }
981
982 return 0;
983
984exit_device_put:
985 platform_device_put(pdev);
986exit:
987 return err;
988}
989
990static int vt8231_pci_probe(struct pci_dev *dev,
991 const struct pci_device_id *id)
992{
993 u16 address, val;
994 if (force_addr) {
995 address = force_addr & 0xff00;
996 dev_warn(&dev->dev, "Forcing ISA address 0x%x\n",
997 address);
998
999 if (PCIBIOS_SUCCESSFUL !=
1000 pci_write_config_word(dev, VT8231_BASE_REG, address | 1))
1001 return -ENODEV;
1002 }
1003
1004 if (PCIBIOS_SUCCESSFUL != pci_read_config_word(dev, VT8231_BASE_REG,
1005 &val))
1006 return -ENODEV;
1007
1008 address = val & ~(VT8231_EXTENT - 1);
1009 if (address == 0) {
1010 dev_err(&dev->dev, "base address not set - upgrade BIOS or use force_addr=0xaddr\n");
1011 return -ENODEV;
1012 }
1013
1014 if (PCIBIOS_SUCCESSFUL != pci_read_config_word(dev, VT8231_ENABLE_REG,
1015 &val))
1016 return -ENODEV;
1017
1018 if (!(val & 0x0001)) {
1019 dev_warn(&dev->dev, "enabling sensors\n");
1020 if (PCIBIOS_SUCCESSFUL !=
1021 pci_write_config_word(dev, VT8231_ENABLE_REG,
1022 val | 0x0001))
1023 return -ENODEV;
1024 }
1025
1026 if (platform_driver_register(&vt8231_driver))
1027 goto exit;
1028
1029 /* Sets global pdev as a side effect */
1030 if (vt8231_device_add(address))
1031 goto exit_unregister;
1032
1033 /*
1034 * Always return failure here. This is to allow other drivers to bind
1035 * to this pci device. We don't really want to have control over the
1036 * pci device, we only wanted to read as few register values from it.
1037 */
1038
1039 /*
1040 * We do, however, mark ourselves as using the PCI device to stop it
1041 * getting unloaded.
1042 */
1043 s_bridge = pci_dev_get(dev);
1044 return -ENODEV;
1045
1046exit_unregister:
1047 platform_driver_unregister(&vt8231_driver);
1048exit:
1049 return -ENODEV;
1050}
1051
1052static int __init sm_vt8231_init(void)
1053{
1054 return pci_register_driver(&vt8231_pci_driver);
1055}
1056
1057static void __exit sm_vt8231_exit(void)
1058{
1059 pci_unregister_driver(&vt8231_pci_driver);
1060 if (s_bridge != NULL) {
1061 platform_device_unregister(pdev);
1062 platform_driver_unregister(&vt8231_driver);
1063 pci_dev_put(s_bridge);
1064 s_bridge = NULL;
1065 }
1066}
1067
1068MODULE_AUTHOR("Roger Lucas <vt8231@hiddenengine.co.uk>");
1069MODULE_DESCRIPTION("VT8231 sensors");
1070MODULE_LICENSE("GPL");
1071
1072module_init(sm_vt8231_init);
1073module_exit(sm_vt8231_exit);