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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/err.h>
26#include <linux/mutex.h>
27#include <linux/acpi.h>
28#include <linux/io.h>
29
30static int force_addr;
31module_param(force_addr, int, 0);
32MODULE_PARM_DESC(force_addr, "Initialize the base address of the sensors");
33
34static struct platform_device *pdev;
35
36#define VT8231_EXTENT 0x80
37#define VT8231_BASE_REG 0x70
38#define VT8231_ENABLE_REG 0x74
39
40#define DRIVER_NAME "vt8231"
41
42/*
43 * The VT8231 registers
44 *
45 * The reset value for the input channel configuration is used (Reg 0x4A=0x07)
46 * which sets the selected inputs marked with '*' below if multiple options are
47 * possible:
48 *
49 * Voltage Mode Temperature Mode
50 * Sensor Linux Id Linux Id VIA Id
51 * -------- -------- -------- ------
52 * CPU Diode N/A temp1 0
53 * UIC1 in0 temp2 * 1
54 * UIC2 in1 * temp3 2
55 * UIC3 in2 * temp4 3
56 * UIC4 in3 * temp5 4
57 * UIC5 in4 * temp6 5
58 * 3.3V in5 N/A
59 *
60 * Note that the BIOS may set the configuration register to a different value
61 * to match the motherboard configuration.
62 */
63
64/* fans numbered 0-1 */
65#define VT8231_REG_FAN_MIN(nr) (0x3b + (nr))
66#define VT8231_REG_FAN(nr) (0x29 + (nr))
67
68/* Voltage inputs numbered 0-5 */
69
70static const u8 regvolt[] = { 0x21, 0x22, 0x23, 0x24, 0x25, 0x26 };
71static const u8 regvoltmax[] = { 0x3d, 0x2b, 0x2d, 0x2f, 0x31, 0x33 };
72static const u8 regvoltmin[] = { 0x3e, 0x2c, 0x2e, 0x30, 0x32, 0x34 };
73
74/*
75 * Temperatures are numbered 1-6 according to the Linux kernel specification.
76 *
77 * In the VIA datasheet, however, the temperatures are numbered from zero.
78 * Since it is important that this driver can easily be compared to the VIA
79 * datasheet, we will use the VIA numbering within this driver and map the
80 * kernel sysfs device name to the VIA number in the sysfs callback.
81 */
82
83#define VT8231_REG_TEMP_LOW01 0x49
84#define VT8231_REG_TEMP_LOW25 0x4d
85
86static const u8 regtemp[] = { 0x1f, 0x21, 0x22, 0x23, 0x24, 0x25 };
87static const u8 regtempmax[] = { 0x39, 0x3d, 0x2b, 0x2d, 0x2f, 0x31 };
88static const u8 regtempmin[] = { 0x3a, 0x3e, 0x2c, 0x2e, 0x30, 0x32 };
89
90#define TEMP_FROM_REG(reg) (((253 * 4 - (reg)) * 550 + 105) / 210)
91#define TEMP_MAXMIN_FROM_REG(reg) (((253 - (reg)) * 2200 + 105) / 210)
92#define TEMP_MAXMIN_TO_REG(val) (253 - ((val) * 210 + 1100) / 2200)
93
94#define VT8231_REG_CONFIG 0x40
95#define VT8231_REG_ALARM1 0x41
96#define VT8231_REG_ALARM2 0x42
97#define VT8231_REG_FANDIV 0x47
98#define VT8231_REG_UCH_CONFIG 0x4a
99#define VT8231_REG_TEMP1_CONFIG 0x4b
100#define VT8231_REG_TEMP2_CONFIG 0x4c
101
102/*
103 * temps 0-5 as numbered in VIA datasheet - see later for mapping to Linux
104 * numbering
105 */
106#define ISTEMP(i, ch_config) ((i) == 0 ? 1 : \
107 ((ch_config) >> ((i)+1)) & 0x01)
108/* voltages 0-5 */
109#define ISVOLT(i, ch_config) ((i) == 5 ? 1 : \
110 !(((ch_config) >> ((i)+2)) & 0x01))
111
112#define DIV_FROM_REG(val) (1 << (val))
113
114/*
115 * NB The values returned here are NOT temperatures. The calibration curves
116 * for the thermistor curves are board-specific and must go in the
117 * sensors.conf file. Temperature sensors are actually ten bits, but the
118 * VIA datasheet only considers the 8 MSBs obtained from the regtemp[]
119 * register. The temperature value returned should have a magnitude of 3,
120 * so we use the VIA scaling as the "true" scaling and use the remaining 2
121 * LSBs as fractional precision.
122 *
123 * All the on-chip hardware temperature comparisons for the alarms are only
124 * 8-bits wide, and compare against the 8 MSBs of the temperature. The bits
125 * in the registers VT8231_REG_TEMP_LOW01 and VT8231_REG_TEMP_LOW25 are
126 * ignored.
127 */
128
129/*
130 ****** FAN RPM CONVERSIONS ********
131 * This chip saturates back at 0, not at 255 like many the other chips.
132 * So, 0 means 0 RPM
133 */
134static inline u8 FAN_TO_REG(long rpm, int div)
135{
136 if (rpm <= 0 || rpm > 1310720)
137 return 0;
138 return clamp_val(1310720 / (rpm * div), 1, 255);
139}
140
141#define FAN_FROM_REG(val, div) ((val) == 0 ? 0 : 1310720 / ((val) * (div)))
142
143struct vt8231_data {
144 unsigned short addr;
145 const char *name;
146
147 struct mutex update_lock;
148 struct device *hwmon_dev;
149 bool valid; /* true if following fields are valid */
150 unsigned long last_updated; /* In jiffies */
151
152 u8 in[6]; /* Register value */
153 u8 in_max[6]; /* Register value */
154 u8 in_min[6]; /* Register value */
155 u16 temp[6]; /* Register value 10 bit, right aligned */
156 u8 temp_max[6]; /* Register value */
157 u8 temp_min[6]; /* Register value */
158 u8 fan[2]; /* Register value */
159 u8 fan_min[2]; /* Register value */
160 u8 fan_div[2]; /* Register encoding, shifted right */
161 u16 alarms; /* Register encoding */
162 u8 uch_config;
163};
164
165static struct pci_dev *s_bridge;
166
167static inline int vt8231_read_value(struct vt8231_data *data, u8 reg)
168{
169 return inb_p(data->addr + reg);
170}
171
172static inline void vt8231_write_value(struct vt8231_data *data, u8 reg,
173 u8 value)
174{
175 outb_p(value, data->addr + reg);
176}
177
178static struct vt8231_data *vt8231_update_device(struct device *dev)
179{
180 struct vt8231_data *data = dev_get_drvdata(dev);
181 int i;
182 u16 low;
183
184 mutex_lock(&data->update_lock);
185
186 if (time_after(jiffies, data->last_updated + HZ + HZ / 2)
187 || !data->valid) {
188 for (i = 0; i < 6; i++) {
189 if (ISVOLT(i, data->uch_config)) {
190 data->in[i] = vt8231_read_value(data,
191 regvolt[i]);
192 data->in_min[i] = vt8231_read_value(data,
193 regvoltmin[i]);
194 data->in_max[i] = vt8231_read_value(data,
195 regvoltmax[i]);
196 }
197 }
198 for (i = 0; i < 2; i++) {
199 data->fan[i] = vt8231_read_value(data,
200 VT8231_REG_FAN(i));
201 data->fan_min[i] = vt8231_read_value(data,
202 VT8231_REG_FAN_MIN(i));
203 }
204
205 low = vt8231_read_value(data, VT8231_REG_TEMP_LOW01);
206 low = (low >> 6) | ((low & 0x30) >> 2)
207 | (vt8231_read_value(data, VT8231_REG_TEMP_LOW25) << 4);
208 for (i = 0; i < 6; i++) {
209 if (ISTEMP(i, data->uch_config)) {
210 data->temp[i] = (vt8231_read_value(data,
211 regtemp[i]) << 2)
212 | ((low >> (2 * i)) & 0x03);
213 data->temp_max[i] = vt8231_read_value(data,
214 regtempmax[i]);
215 data->temp_min[i] = vt8231_read_value(data,
216 regtempmin[i]);
217 }
218 }
219
220 i = vt8231_read_value(data, VT8231_REG_FANDIV);
221 data->fan_div[0] = (i >> 4) & 0x03;
222 data->fan_div[1] = i >> 6;
223 data->alarms = vt8231_read_value(data, VT8231_REG_ALARM1) |
224 (vt8231_read_value(data, VT8231_REG_ALARM2) << 8);
225
226 /* Set alarm flags correctly */
227 if (!data->fan[0] && data->fan_min[0])
228 data->alarms |= 0x40;
229 else if (data->fan[0] && !data->fan_min[0])
230 data->alarms &= ~0x40;
231
232 if (!data->fan[1] && data->fan_min[1])
233 data->alarms |= 0x80;
234 else if (data->fan[1] && !data->fan_min[1])
235 data->alarms &= ~0x80;
236
237 data->last_updated = jiffies;
238 data->valid = true;
239 }
240
241 mutex_unlock(&data->update_lock);
242
243 return data;
244}
245
246/* following are the sysfs callback functions */
247static ssize_t in_show(struct device *dev, struct device_attribute *attr,
248 char *buf)
249{
250 struct sensor_device_attribute *sensor_attr = to_sensor_dev_attr(attr);
251 int nr = sensor_attr->index;
252 struct vt8231_data *data = vt8231_update_device(dev);
253
254 return sprintf(buf, "%d\n", ((data->in[nr] - 3) * 10000) / 958);
255}
256
257static ssize_t in_min_show(struct device *dev, struct device_attribute *attr,
258 char *buf)
259{
260 struct sensor_device_attribute *sensor_attr = to_sensor_dev_attr(attr);
261 int nr = sensor_attr->index;
262 struct vt8231_data *data = vt8231_update_device(dev);
263
264 return sprintf(buf, "%d\n", ((data->in_min[nr] - 3) * 10000) / 958);
265}
266
267static ssize_t in_max_show(struct device *dev, struct device_attribute *attr,
268 char *buf)
269{
270 struct sensor_device_attribute *sensor_attr = to_sensor_dev_attr(attr);
271 int nr = sensor_attr->index;
272 struct vt8231_data *data = vt8231_update_device(dev);
273
274 return sprintf(buf, "%d\n", (((data->in_max[nr] - 3) * 10000) / 958));
275}
276
277static ssize_t in_min_store(struct device *dev, struct device_attribute *attr,
278 const char *buf, size_t count)
279{
280 struct sensor_device_attribute *sensor_attr = to_sensor_dev_attr(attr);
281 int nr = sensor_attr->index;
282 struct vt8231_data *data = dev_get_drvdata(dev);
283 unsigned long val;
284 int err;
285
286 err = kstrtoul(buf, 10, &val);
287 if (err)
288 return err;
289
290 mutex_lock(&data->update_lock);
291 data->in_min[nr] = clamp_val(((val * 958) / 10000) + 3, 0, 255);
292 vt8231_write_value(data, regvoltmin[nr], data->in_min[nr]);
293 mutex_unlock(&data->update_lock);
294 return count;
295}
296
297static ssize_t in_max_store(struct device *dev, struct device_attribute *attr,
298 const char *buf, size_t count)
299{
300 struct sensor_device_attribute *sensor_attr = to_sensor_dev_attr(attr);
301 int nr = sensor_attr->index;
302 struct vt8231_data *data = dev_get_drvdata(dev);
303 unsigned long val;
304 int err;
305
306 err = kstrtoul(buf, 10, &val);
307 if (err)
308 return err;
309
310 mutex_lock(&data->update_lock);
311 data->in_max[nr] = clamp_val(((val * 958) / 10000) + 3, 0, 255);
312 vt8231_write_value(data, regvoltmax[nr], data->in_max[nr]);
313 mutex_unlock(&data->update_lock);
314 return count;
315}
316
317/* Special case for input 5 as this has 3.3V scaling built into the chip */
318static ssize_t in5_input_show(struct device *dev,
319 struct device_attribute *attr, char *buf)
320{
321 struct vt8231_data *data = vt8231_update_device(dev);
322
323 return sprintf(buf, "%d\n",
324 (((data->in[5] - 3) * 10000 * 54) / (958 * 34)));
325}
326
327static ssize_t in5_min_show(struct device *dev, struct device_attribute *attr,
328 char *buf)
329{
330 struct vt8231_data *data = vt8231_update_device(dev);
331
332 return sprintf(buf, "%d\n",
333 (((data->in_min[5] - 3) * 10000 * 54) / (958 * 34)));
334}
335
336static ssize_t in5_max_show(struct device *dev, struct device_attribute *attr,
337 char *buf)
338{
339 struct vt8231_data *data = vt8231_update_device(dev);
340
341 return sprintf(buf, "%d\n",
342 (((data->in_max[5] - 3) * 10000 * 54) / (958 * 34)));
343}
344
345static ssize_t in5_min_store(struct device *dev,
346 struct device_attribute *attr, const char *buf,
347 size_t count)
348{
349 struct vt8231_data *data = dev_get_drvdata(dev);
350 unsigned long val;
351 int err;
352
353 err = kstrtoul(buf, 10, &val);
354 if (err)
355 return err;
356
357 mutex_lock(&data->update_lock);
358 data->in_min[5] = clamp_val(((val * 958 * 34) / (10000 * 54)) + 3,
359 0, 255);
360 vt8231_write_value(data, regvoltmin[5], data->in_min[5]);
361 mutex_unlock(&data->update_lock);
362 return count;
363}
364
365static ssize_t in5_max_store(struct device *dev,
366 struct device_attribute *attr, const char *buf,
367 size_t count)
368{
369 struct vt8231_data *data = dev_get_drvdata(dev);
370 unsigned long val;
371 int err;
372
373 err = kstrtoul(buf, 10, &val);
374 if (err)
375 return err;
376
377 mutex_lock(&data->update_lock);
378 data->in_max[5] = clamp_val(((val * 958 * 34) / (10000 * 54)) + 3,
379 0, 255);
380 vt8231_write_value(data, regvoltmax[5], data->in_max[5]);
381 mutex_unlock(&data->update_lock);
382 return count;
383}
384
385static SENSOR_DEVICE_ATTR_RO(in0_input, in, 0);
386static SENSOR_DEVICE_ATTR_RW(in0_min, in_min, 0);
387static SENSOR_DEVICE_ATTR_RW(in0_max, in_max, 0);
388static SENSOR_DEVICE_ATTR_RO(in1_input, in, 1);
389static SENSOR_DEVICE_ATTR_RW(in1_min, in_min, 1);
390static SENSOR_DEVICE_ATTR_RW(in1_max, in_max, 1);
391static SENSOR_DEVICE_ATTR_RO(in2_input, in, 2);
392static SENSOR_DEVICE_ATTR_RW(in2_min, in_min, 2);
393static SENSOR_DEVICE_ATTR_RW(in2_max, in_max, 2);
394static SENSOR_DEVICE_ATTR_RO(in3_input, in, 3);
395static SENSOR_DEVICE_ATTR_RW(in3_min, in_min, 3);
396static SENSOR_DEVICE_ATTR_RW(in3_max, in_max, 3);
397static SENSOR_DEVICE_ATTR_RO(in4_input, in, 4);
398static SENSOR_DEVICE_ATTR_RW(in4_min, in_min, 4);
399static SENSOR_DEVICE_ATTR_RW(in4_max, in_max, 4);
400
401static DEVICE_ATTR_RO(in5_input);
402static DEVICE_ATTR_RW(in5_min);
403static DEVICE_ATTR_RW(in5_max);
404
405/* Temperatures */
406static ssize_t temp1_input_show(struct device *dev,
407 struct device_attribute *attr, char *buf)
408{
409 struct vt8231_data *data = vt8231_update_device(dev);
410 return sprintf(buf, "%d\n", data->temp[0] * 250);
411}
412
413static ssize_t temp1_max_show(struct device *dev, struct device_attribute *attr,
414 char *buf)
415{
416 struct vt8231_data *data = vt8231_update_device(dev);
417 return sprintf(buf, "%d\n", data->temp_max[0] * 1000);
418}
419
420static ssize_t temp1_max_hyst_show(struct device *dev,
421 struct device_attribute *attr, char *buf)
422{
423 struct vt8231_data *data = vt8231_update_device(dev);
424 return sprintf(buf, "%d\n", data->temp_min[0] * 1000);
425}
426
427static ssize_t temp1_max_store(struct device *dev,
428 struct device_attribute *attr, const char *buf,
429 size_t count)
430{
431 struct vt8231_data *data = dev_get_drvdata(dev);
432 long val;
433 int err;
434
435 err = kstrtol(buf, 10, &val);
436 if (err)
437 return err;
438
439 mutex_lock(&data->update_lock);
440 data->temp_max[0] = clamp_val((val + 500) / 1000, 0, 255);
441 vt8231_write_value(data, regtempmax[0], data->temp_max[0]);
442 mutex_unlock(&data->update_lock);
443 return count;
444}
445static ssize_t temp1_max_hyst_store(struct device *dev,
446 struct device_attribute *attr,
447 const char *buf, size_t count)
448{
449 struct vt8231_data *data = dev_get_drvdata(dev);
450 long val;
451 int err;
452
453 err = kstrtol(buf, 10, &val);
454 if (err)
455 return err;
456
457 mutex_lock(&data->update_lock);
458 data->temp_min[0] = clamp_val((val + 500) / 1000, 0, 255);
459 vt8231_write_value(data, regtempmin[0], data->temp_min[0]);
460 mutex_unlock(&data->update_lock);
461 return count;
462}
463
464static ssize_t temp_show(struct device *dev, struct device_attribute *attr,
465 char *buf)
466{
467 struct sensor_device_attribute *sensor_attr = to_sensor_dev_attr(attr);
468 int nr = sensor_attr->index;
469 struct vt8231_data *data = vt8231_update_device(dev);
470 return sprintf(buf, "%d\n", TEMP_FROM_REG(data->temp[nr]));
471}
472
473static ssize_t temp_max_show(struct device *dev,
474 struct device_attribute *attr, char *buf)
475{
476 struct sensor_device_attribute *sensor_attr = to_sensor_dev_attr(attr);
477 int nr = sensor_attr->index;
478 struct vt8231_data *data = vt8231_update_device(dev);
479 return sprintf(buf, "%d\n", TEMP_MAXMIN_FROM_REG(data->temp_max[nr]));
480}
481
482static ssize_t temp_min_show(struct device *dev,
483 struct device_attribute *attr, char *buf)
484{
485 struct sensor_device_attribute *sensor_attr = to_sensor_dev_attr(attr);
486 int nr = sensor_attr->index;
487 struct vt8231_data *data = vt8231_update_device(dev);
488 return sprintf(buf, "%d\n", TEMP_MAXMIN_FROM_REG(data->temp_min[nr]));
489}
490
491static ssize_t temp_max_store(struct device *dev,
492 struct device_attribute *attr, const char *buf,
493 size_t count)
494{
495 struct sensor_device_attribute *sensor_attr = to_sensor_dev_attr(attr);
496 int nr = sensor_attr->index;
497 struct vt8231_data *data = dev_get_drvdata(dev);
498 long val;
499 int err;
500
501 err = kstrtol(buf, 10, &val);
502 if (err)
503 return err;
504
505 mutex_lock(&data->update_lock);
506 data->temp_max[nr] = clamp_val(TEMP_MAXMIN_TO_REG(val), 0, 255);
507 vt8231_write_value(data, regtempmax[nr], data->temp_max[nr]);
508 mutex_unlock(&data->update_lock);
509 return count;
510}
511static ssize_t temp_min_store(struct device *dev,
512 struct device_attribute *attr, const char *buf,
513 size_t count)
514{
515 struct sensor_device_attribute *sensor_attr = to_sensor_dev_attr(attr);
516 int nr = sensor_attr->index;
517 struct vt8231_data *data = dev_get_drvdata(dev);
518 long val;
519 int err;
520
521 err = kstrtol(buf, 10, &val);
522 if (err)
523 return err;
524
525 mutex_lock(&data->update_lock);
526 data->temp_min[nr] = clamp_val(TEMP_MAXMIN_TO_REG(val), 0, 255);
527 vt8231_write_value(data, regtempmin[nr], data->temp_min[nr]);
528 mutex_unlock(&data->update_lock);
529 return count;
530}
531
532/*
533 * Note that these map the Linux temperature sensor numbering (1-6) to the VIA
534 * temperature sensor numbering (0-5)
535 */
536
537static DEVICE_ATTR_RO(temp1_input);
538static DEVICE_ATTR_RW(temp1_max);
539static DEVICE_ATTR_RW(temp1_max_hyst);
540
541static SENSOR_DEVICE_ATTR_RO(temp2_input, temp, 1);
542static SENSOR_DEVICE_ATTR_RW(temp2_max, temp_max, 1);
543static SENSOR_DEVICE_ATTR_RW(temp2_max_hyst, temp_min, 1);
544static SENSOR_DEVICE_ATTR_RO(temp3_input, temp, 2);
545static SENSOR_DEVICE_ATTR_RW(temp3_max, temp_max, 2);
546static SENSOR_DEVICE_ATTR_RW(temp3_max_hyst, temp_min, 2);
547static SENSOR_DEVICE_ATTR_RO(temp4_input, temp, 3);
548static SENSOR_DEVICE_ATTR_RW(temp4_max, temp_max, 3);
549static SENSOR_DEVICE_ATTR_RW(temp4_max_hyst, temp_min, 3);
550static SENSOR_DEVICE_ATTR_RO(temp5_input, temp, 4);
551static SENSOR_DEVICE_ATTR_RW(temp5_max, temp_max, 4);
552static SENSOR_DEVICE_ATTR_RW(temp5_max_hyst, temp_min, 4);
553static SENSOR_DEVICE_ATTR_RO(temp6_input, temp, 5);
554static SENSOR_DEVICE_ATTR_RW(temp6_max, temp_max, 5);
555static SENSOR_DEVICE_ATTR_RW(temp6_max_hyst, temp_min, 5);
556
557/* Fans */
558static ssize_t fan_show(struct device *dev, struct device_attribute *attr,
559 char *buf)
560{
561 struct sensor_device_attribute *sensor_attr = to_sensor_dev_attr(attr);
562 int nr = sensor_attr->index;
563 struct vt8231_data *data = vt8231_update_device(dev);
564 return sprintf(buf, "%d\n", FAN_FROM_REG(data->fan[nr],
565 DIV_FROM_REG(data->fan_div[nr])));
566}
567
568static ssize_t fan_min_show(struct device *dev, struct device_attribute *attr,
569 char *buf)
570{
571 struct sensor_device_attribute *sensor_attr = to_sensor_dev_attr(attr);
572 int nr = sensor_attr->index;
573 struct vt8231_data *data = vt8231_update_device(dev);
574 return sprintf(buf, "%d\n", FAN_FROM_REG(data->fan_min[nr],
575 DIV_FROM_REG(data->fan_div[nr])));
576}
577
578static ssize_t fan_div_show(struct device *dev, struct device_attribute *attr,
579 char *buf)
580{
581 struct sensor_device_attribute *sensor_attr = to_sensor_dev_attr(attr);
582 int nr = sensor_attr->index;
583 struct vt8231_data *data = vt8231_update_device(dev);
584 return sprintf(buf, "%d\n", DIV_FROM_REG(data->fan_div[nr]));
585}
586
587static ssize_t fan_min_store(struct device *dev,
588 struct device_attribute *attr, const char *buf,
589 size_t count)
590{
591 struct sensor_device_attribute *sensor_attr = to_sensor_dev_attr(attr);
592 int nr = sensor_attr->index;
593 struct vt8231_data *data = dev_get_drvdata(dev);
594 unsigned long val;
595 int err;
596
597 err = kstrtoul(buf, 10, &val);
598 if (err)
599 return err;
600
601 mutex_lock(&data->update_lock);
602 data->fan_min[nr] = FAN_TO_REG(val, DIV_FROM_REG(data->fan_div[nr]));
603 vt8231_write_value(data, VT8231_REG_FAN_MIN(nr), data->fan_min[nr]);
604 mutex_unlock(&data->update_lock);
605 return count;
606}
607
608static ssize_t fan_div_store(struct device *dev,
609 struct device_attribute *attr, const char *buf,
610 size_t count)
611{
612 struct vt8231_data *data = dev_get_drvdata(dev);
613 struct sensor_device_attribute *sensor_attr = to_sensor_dev_attr(attr);
614 unsigned long val;
615 int nr = sensor_attr->index;
616 int old = vt8231_read_value(data, VT8231_REG_FANDIV);
617 long min = FAN_FROM_REG(data->fan_min[nr],
618 DIV_FROM_REG(data->fan_div[nr]));
619 int err;
620
621 err = kstrtoul(buf, 10, &val);
622 if (err)
623 return err;
624
625 mutex_lock(&data->update_lock);
626 switch (val) {
627 case 1:
628 data->fan_div[nr] = 0;
629 break;
630 case 2:
631 data->fan_div[nr] = 1;
632 break;
633 case 4:
634 data->fan_div[nr] = 2;
635 break;
636 case 8:
637 data->fan_div[nr] = 3;
638 break;
639 default:
640 dev_err(dev,
641 "fan_div value %ld not supported. Choose one of 1, 2, 4 or 8!\n",
642 val);
643 mutex_unlock(&data->update_lock);
644 return -EINVAL;
645 }
646
647 /* Correct the fan minimum speed */
648 data->fan_min[nr] = FAN_TO_REG(min, DIV_FROM_REG(data->fan_div[nr]));
649 vt8231_write_value(data, VT8231_REG_FAN_MIN(nr), data->fan_min[nr]);
650
651 old = (old & 0x0f) | (data->fan_div[1] << 6) | (data->fan_div[0] << 4);
652 vt8231_write_value(data, VT8231_REG_FANDIV, old);
653 mutex_unlock(&data->update_lock);
654 return count;
655}
656
657static SENSOR_DEVICE_ATTR_RO(fan1_input, fan, 0);
658static SENSOR_DEVICE_ATTR_RW(fan1_min, fan_min, 0);
659static SENSOR_DEVICE_ATTR_RW(fan1_div, fan_div, 0);
660static SENSOR_DEVICE_ATTR_RO(fan2_input, fan, 1);
661static SENSOR_DEVICE_ATTR_RW(fan2_min, fan_min, 1);
662static SENSOR_DEVICE_ATTR_RW(fan2_div, fan_div, 1);
663
664/* Alarms */
665static ssize_t alarms_show(struct device *dev, struct device_attribute *attr,
666 char *buf)
667{
668 struct vt8231_data *data = vt8231_update_device(dev);
669 return sprintf(buf, "%d\n", data->alarms);
670}
671static DEVICE_ATTR_RO(alarms);
672
673static ssize_t alarm_show(struct device *dev, struct device_attribute *attr,
674 char *buf)
675{
676 int bitnr = to_sensor_dev_attr(attr)->index;
677 struct vt8231_data *data = vt8231_update_device(dev);
678 return sprintf(buf, "%u\n", (data->alarms >> bitnr) & 1);
679}
680static SENSOR_DEVICE_ATTR_RO(temp1_alarm, alarm, 4);
681static SENSOR_DEVICE_ATTR_RO(temp2_alarm, alarm, 11);
682static SENSOR_DEVICE_ATTR_RO(temp3_alarm, alarm, 0);
683static SENSOR_DEVICE_ATTR_RO(temp4_alarm, alarm, 1);
684static SENSOR_DEVICE_ATTR_RO(temp5_alarm, alarm, 3);
685static SENSOR_DEVICE_ATTR_RO(temp6_alarm, alarm, 8);
686static SENSOR_DEVICE_ATTR_RO(in0_alarm, alarm, 11);
687static SENSOR_DEVICE_ATTR_RO(in1_alarm, alarm, 0);
688static SENSOR_DEVICE_ATTR_RO(in2_alarm, alarm, 1);
689static SENSOR_DEVICE_ATTR_RO(in3_alarm, alarm, 3);
690static SENSOR_DEVICE_ATTR_RO(in4_alarm, alarm, 8);
691static SENSOR_DEVICE_ATTR_RO(in5_alarm, alarm, 2);
692static SENSOR_DEVICE_ATTR_RO(fan1_alarm, alarm, 6);
693static SENSOR_DEVICE_ATTR_RO(fan2_alarm, alarm, 7);
694
695static ssize_t name_show(struct device *dev, struct device_attribute
696 *devattr, char *buf)
697{
698 struct vt8231_data *data = dev_get_drvdata(dev);
699 return sprintf(buf, "%s\n", data->name);
700}
701static DEVICE_ATTR_RO(name);
702
703static struct attribute *vt8231_attributes_temps[6][5] = {
704 {
705 &dev_attr_temp1_input.attr,
706 &dev_attr_temp1_max_hyst.attr,
707 &dev_attr_temp1_max.attr,
708 &sensor_dev_attr_temp1_alarm.dev_attr.attr,
709 NULL
710 }, {
711 &sensor_dev_attr_temp2_input.dev_attr.attr,
712 &sensor_dev_attr_temp2_max_hyst.dev_attr.attr,
713 &sensor_dev_attr_temp2_max.dev_attr.attr,
714 &sensor_dev_attr_temp2_alarm.dev_attr.attr,
715 NULL
716 }, {
717 &sensor_dev_attr_temp3_input.dev_attr.attr,
718 &sensor_dev_attr_temp3_max_hyst.dev_attr.attr,
719 &sensor_dev_attr_temp3_max.dev_attr.attr,
720 &sensor_dev_attr_temp3_alarm.dev_attr.attr,
721 NULL
722 }, {
723 &sensor_dev_attr_temp4_input.dev_attr.attr,
724 &sensor_dev_attr_temp4_max_hyst.dev_attr.attr,
725 &sensor_dev_attr_temp4_max.dev_attr.attr,
726 &sensor_dev_attr_temp4_alarm.dev_attr.attr,
727 NULL
728 }, {
729 &sensor_dev_attr_temp5_input.dev_attr.attr,
730 &sensor_dev_attr_temp5_max_hyst.dev_attr.attr,
731 &sensor_dev_attr_temp5_max.dev_attr.attr,
732 &sensor_dev_attr_temp5_alarm.dev_attr.attr,
733 NULL
734 }, {
735 &sensor_dev_attr_temp6_input.dev_attr.attr,
736 &sensor_dev_attr_temp6_max_hyst.dev_attr.attr,
737 &sensor_dev_attr_temp6_max.dev_attr.attr,
738 &sensor_dev_attr_temp6_alarm.dev_attr.attr,
739 NULL
740 }
741};
742
743static const struct attribute_group vt8231_group_temps[6] = {
744 { .attrs = vt8231_attributes_temps[0] },
745 { .attrs = vt8231_attributes_temps[1] },
746 { .attrs = vt8231_attributes_temps[2] },
747 { .attrs = vt8231_attributes_temps[3] },
748 { .attrs = vt8231_attributes_temps[4] },
749 { .attrs = vt8231_attributes_temps[5] },
750};
751
752static struct attribute *vt8231_attributes_volts[6][5] = {
753 {
754 &sensor_dev_attr_in0_input.dev_attr.attr,
755 &sensor_dev_attr_in0_min.dev_attr.attr,
756 &sensor_dev_attr_in0_max.dev_attr.attr,
757 &sensor_dev_attr_in0_alarm.dev_attr.attr,
758 NULL
759 }, {
760 &sensor_dev_attr_in1_input.dev_attr.attr,
761 &sensor_dev_attr_in1_min.dev_attr.attr,
762 &sensor_dev_attr_in1_max.dev_attr.attr,
763 &sensor_dev_attr_in1_alarm.dev_attr.attr,
764 NULL
765 }, {
766 &sensor_dev_attr_in2_input.dev_attr.attr,
767 &sensor_dev_attr_in2_min.dev_attr.attr,
768 &sensor_dev_attr_in2_max.dev_attr.attr,
769 &sensor_dev_attr_in2_alarm.dev_attr.attr,
770 NULL
771 }, {
772 &sensor_dev_attr_in3_input.dev_attr.attr,
773 &sensor_dev_attr_in3_min.dev_attr.attr,
774 &sensor_dev_attr_in3_max.dev_attr.attr,
775 &sensor_dev_attr_in3_alarm.dev_attr.attr,
776 NULL
777 }, {
778 &sensor_dev_attr_in4_input.dev_attr.attr,
779 &sensor_dev_attr_in4_min.dev_attr.attr,
780 &sensor_dev_attr_in4_max.dev_attr.attr,
781 &sensor_dev_attr_in4_alarm.dev_attr.attr,
782 NULL
783 }, {
784 &dev_attr_in5_input.attr,
785 &dev_attr_in5_min.attr,
786 &dev_attr_in5_max.attr,
787 &sensor_dev_attr_in5_alarm.dev_attr.attr,
788 NULL
789 }
790};
791
792static const struct attribute_group vt8231_group_volts[6] = {
793 { .attrs = vt8231_attributes_volts[0] },
794 { .attrs = vt8231_attributes_volts[1] },
795 { .attrs = vt8231_attributes_volts[2] },
796 { .attrs = vt8231_attributes_volts[3] },
797 { .attrs = vt8231_attributes_volts[4] },
798 { .attrs = vt8231_attributes_volts[5] },
799};
800
801static struct attribute *vt8231_attributes[] = {
802 &sensor_dev_attr_fan1_input.dev_attr.attr,
803 &sensor_dev_attr_fan2_input.dev_attr.attr,
804 &sensor_dev_attr_fan1_min.dev_attr.attr,
805 &sensor_dev_attr_fan2_min.dev_attr.attr,
806 &sensor_dev_attr_fan1_div.dev_attr.attr,
807 &sensor_dev_attr_fan2_div.dev_attr.attr,
808 &sensor_dev_attr_fan1_alarm.dev_attr.attr,
809 &sensor_dev_attr_fan2_alarm.dev_attr.attr,
810 &dev_attr_alarms.attr,
811 &dev_attr_name.attr,
812 NULL
813};
814
815static const struct attribute_group vt8231_group = {
816 .attrs = vt8231_attributes,
817};
818
819static void vt8231_init_device(struct vt8231_data *data)
820{
821 vt8231_write_value(data, VT8231_REG_TEMP1_CONFIG, 0);
822 vt8231_write_value(data, VT8231_REG_TEMP2_CONFIG, 0);
823}
824
825static int vt8231_probe(struct platform_device *pdev)
826{
827 struct resource *res;
828 struct vt8231_data *data;
829 int err = 0, i;
830
831 /* Reserve the ISA region */
832 res = platform_get_resource(pdev, IORESOURCE_IO, 0);
833 if (!devm_request_region(&pdev->dev, res->start, VT8231_EXTENT,
834 DRIVER_NAME)) {
835 dev_err(&pdev->dev, "Region 0x%lx-0x%lx already in use!\n",
836 (unsigned long)res->start, (unsigned long)res->end);
837 return -ENODEV;
838 }
839
840 data = devm_kzalloc(&pdev->dev, sizeof(struct vt8231_data), GFP_KERNEL);
841 if (!data)
842 return -ENOMEM;
843
844 platform_set_drvdata(pdev, data);
845 data->addr = res->start;
846 data->name = DRIVER_NAME;
847
848 mutex_init(&data->update_lock);
849 vt8231_init_device(data);
850
851 /* Register sysfs hooks */
852 err = sysfs_create_group(&pdev->dev.kobj, &vt8231_group);
853 if (err)
854 return err;
855
856 /* Must update device information to find out the config field */
857 data->uch_config = vt8231_read_value(data, VT8231_REG_UCH_CONFIG);
858
859 for (i = 0; i < ARRAY_SIZE(vt8231_group_temps); i++) {
860 if (ISTEMP(i, data->uch_config)) {
861 err = sysfs_create_group(&pdev->dev.kobj,
862 &vt8231_group_temps[i]);
863 if (err)
864 goto exit_remove_files;
865 }
866 }
867
868 for (i = 0; i < ARRAY_SIZE(vt8231_group_volts); i++) {
869 if (ISVOLT(i, data->uch_config)) {
870 err = sysfs_create_group(&pdev->dev.kobj,
871 &vt8231_group_volts[i]);
872 if (err)
873 goto exit_remove_files;
874 }
875 }
876
877 data->hwmon_dev = hwmon_device_register(&pdev->dev);
878 if (IS_ERR(data->hwmon_dev)) {
879 err = PTR_ERR(data->hwmon_dev);
880 goto exit_remove_files;
881 }
882 return 0;
883
884exit_remove_files:
885 for (i = 0; i < ARRAY_SIZE(vt8231_group_volts); i++)
886 sysfs_remove_group(&pdev->dev.kobj, &vt8231_group_volts[i]);
887
888 for (i = 0; i < ARRAY_SIZE(vt8231_group_temps); i++)
889 sysfs_remove_group(&pdev->dev.kobj, &vt8231_group_temps[i]);
890
891 sysfs_remove_group(&pdev->dev.kobj, &vt8231_group);
892 return err;
893}
894
895static void vt8231_remove(struct platform_device *pdev)
896{
897 struct vt8231_data *data = platform_get_drvdata(pdev);
898 int i;
899
900 hwmon_device_unregister(data->hwmon_dev);
901
902 for (i = 0; i < ARRAY_SIZE(vt8231_group_volts); i++)
903 sysfs_remove_group(&pdev->dev.kobj, &vt8231_group_volts[i]);
904
905 for (i = 0; i < ARRAY_SIZE(vt8231_group_temps); i++)
906 sysfs_remove_group(&pdev->dev.kobj, &vt8231_group_temps[i]);
907
908 sysfs_remove_group(&pdev->dev.kobj, &vt8231_group);
909}
910
911
912static struct platform_driver vt8231_driver = {
913 .driver = {
914 .name = DRIVER_NAME,
915 },
916 .probe = vt8231_probe,
917 .remove_new = vt8231_remove,
918};
919
920static const struct pci_device_id vt8231_pci_ids[] = {
921 { PCI_DEVICE(PCI_VENDOR_ID_VIA, PCI_DEVICE_ID_VIA_8231_4) },
922 { 0, }
923};
924
925MODULE_DEVICE_TABLE(pci, vt8231_pci_ids);
926
927static int vt8231_device_add(unsigned short address)
928{
929 struct resource res = {
930 .start = address,
931 .end = address + VT8231_EXTENT - 1,
932 .name = DRIVER_NAME,
933 .flags = IORESOURCE_IO,
934 };
935 int err;
936
937 err = acpi_check_resource_conflict(&res);
938 if (err)
939 goto exit;
940
941 pdev = platform_device_alloc(DRIVER_NAME, address);
942 if (!pdev) {
943 err = -ENOMEM;
944 pr_err("Device allocation failed\n");
945 goto exit;
946 }
947
948 err = platform_device_add_resources(pdev, &res, 1);
949 if (err) {
950 pr_err("Device resource addition failed (%d)\n", err);
951 goto exit_device_put;
952 }
953
954 err = platform_device_add(pdev);
955 if (err) {
956 pr_err("Device addition failed (%d)\n", err);
957 goto exit_device_put;
958 }
959
960 return 0;
961
962exit_device_put:
963 platform_device_put(pdev);
964exit:
965 return err;
966}
967
968static int vt8231_pci_probe(struct pci_dev *dev,
969 const struct pci_device_id *id)
970{
971 u16 address, val;
972 int ret;
973
974 if (force_addr) {
975 address = force_addr & 0xff00;
976 dev_warn(&dev->dev, "Forcing ISA address 0x%x\n",
977 address);
978
979 ret = pci_write_config_word(dev, VT8231_BASE_REG, address | 1);
980 if (ret != PCIBIOS_SUCCESSFUL)
981 return -ENODEV;
982 }
983
984 pci_read_config_word(dev, VT8231_BASE_REG, &val);
985 if (val == (u16)~0)
986 return -ENODEV;
987
988 address = val & ~(VT8231_EXTENT - 1);
989 if (address == 0) {
990 dev_err(&dev->dev, "base address not set - upgrade BIOS or use force_addr=0xaddr\n");
991 return -ENODEV;
992 }
993
994 pci_read_config_word(dev, VT8231_ENABLE_REG, &val);
995 if (val == (u16)~0)
996 return -ENODEV;
997
998 if (!(val & 0x0001)) {
999 dev_warn(&dev->dev, "enabling sensors\n");
1000 ret = pci_write_config_word(dev, VT8231_ENABLE_REG, val | 0x1);
1001 if (ret != PCIBIOS_SUCCESSFUL)
1002 return -ENODEV;
1003 }
1004
1005 if (platform_driver_register(&vt8231_driver))
1006 goto exit;
1007
1008 /* Sets global pdev as a side effect */
1009 if (vt8231_device_add(address))
1010 goto exit_unregister;
1011
1012 /*
1013 * Always return failure here. This is to allow other drivers to bind
1014 * to this pci device. We don't really want to have control over the
1015 * pci device, we only wanted to read as few register values from it.
1016 */
1017
1018 /*
1019 * We do, however, mark ourselves as using the PCI device to stop it
1020 * getting unloaded.
1021 */
1022 s_bridge = pci_dev_get(dev);
1023 return -ENODEV;
1024
1025exit_unregister:
1026 platform_driver_unregister(&vt8231_driver);
1027exit:
1028 return -ENODEV;
1029}
1030
1031static struct pci_driver vt8231_pci_driver = {
1032 .name = DRIVER_NAME,
1033 .id_table = vt8231_pci_ids,
1034 .probe = vt8231_pci_probe,
1035};
1036
1037static int __init sm_vt8231_init(void)
1038{
1039 return pci_register_driver(&vt8231_pci_driver);
1040}
1041
1042static void __exit sm_vt8231_exit(void)
1043{
1044 pci_unregister_driver(&vt8231_pci_driver);
1045 if (s_bridge != NULL) {
1046 platform_device_unregister(pdev);
1047 platform_driver_unregister(&vt8231_driver);
1048 pci_dev_put(s_bridge);
1049 s_bridge = NULL;
1050 }
1051}
1052
1053MODULE_AUTHOR("Roger Lucas <vt8231@hiddenengine.co.uk>");
1054MODULE_DESCRIPTION("VT8231 sensors");
1055MODULE_LICENSE("GPL");
1056
1057module_init(sm_vt8231_init);
1058module_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 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] = clamp_val(((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] = clamp_val(((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] = clamp_val((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] = clamp_val((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] = clamp_val(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] = clamp_val(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,
577 "fan_div value %ld not supported. Choose one of 1, 2, 4 or 8!\n",
578 val);
579 mutex_unlock(&data->update_lock);
580 return -EINVAL;
581 }
582
583 /* Correct the fan minimum speed */
584 data->fan_min[nr] = FAN_TO_REG(min, DIV_FROM_REG(data->fan_div[nr]));
585 vt8231_write_value(data, VT8231_REG_FAN_MIN(nr), data->fan_min[nr]);
586
587 old = (old & 0x0f) | (data->fan_div[1] << 6) | (data->fan_div[0] << 4);
588 vt8231_write_value(data, VT8231_REG_FANDIV, old);
589 mutex_unlock(&data->update_lock);
590 return count;
591}
592
593
594#define define_fan_sysfs(offset) \
595static SENSOR_DEVICE_ATTR(fan##offset##_input, S_IRUGO, \
596 show_fan, NULL, offset - 1); \
597static SENSOR_DEVICE_ATTR(fan##offset##_div, S_IRUGO | S_IWUSR, \
598 show_fan_div, set_fan_div, offset - 1); \
599static SENSOR_DEVICE_ATTR(fan##offset##_min, S_IRUGO | S_IWUSR, \
600 show_fan_min, set_fan_min, offset - 1)
601
602define_fan_sysfs(1);
603define_fan_sysfs(2);
604
605/* Alarms */
606static ssize_t show_alarms(struct device *dev, struct device_attribute *attr,
607 char *buf)
608{
609 struct vt8231_data *data = vt8231_update_device(dev);
610 return sprintf(buf, "%d\n", data->alarms);
611}
612static DEVICE_ATTR(alarms, S_IRUGO, show_alarms, NULL);
613
614static ssize_t show_alarm(struct device *dev, struct device_attribute *attr,
615 char *buf)
616{
617 int bitnr = to_sensor_dev_attr(attr)->index;
618 struct vt8231_data *data = vt8231_update_device(dev);
619 return sprintf(buf, "%u\n", (data->alarms >> bitnr) & 1);
620}
621static SENSOR_DEVICE_ATTR(temp1_alarm, S_IRUGO, show_alarm, NULL, 4);
622static SENSOR_DEVICE_ATTR(temp2_alarm, S_IRUGO, show_alarm, NULL, 11);
623static SENSOR_DEVICE_ATTR(temp3_alarm, S_IRUGO, show_alarm, NULL, 0);
624static SENSOR_DEVICE_ATTR(temp4_alarm, S_IRUGO, show_alarm, NULL, 1);
625static SENSOR_DEVICE_ATTR(temp5_alarm, S_IRUGO, show_alarm, NULL, 3);
626static SENSOR_DEVICE_ATTR(temp6_alarm, S_IRUGO, show_alarm, NULL, 8);
627static SENSOR_DEVICE_ATTR(in0_alarm, S_IRUGO, show_alarm, NULL, 11);
628static SENSOR_DEVICE_ATTR(in1_alarm, S_IRUGO, show_alarm, NULL, 0);
629static SENSOR_DEVICE_ATTR(in2_alarm, S_IRUGO, show_alarm, NULL, 1);
630static SENSOR_DEVICE_ATTR(in3_alarm, S_IRUGO, show_alarm, NULL, 3);
631static SENSOR_DEVICE_ATTR(in4_alarm, S_IRUGO, show_alarm, NULL, 8);
632static SENSOR_DEVICE_ATTR(in5_alarm, S_IRUGO, show_alarm, NULL, 2);
633static SENSOR_DEVICE_ATTR(fan1_alarm, S_IRUGO, show_alarm, NULL, 6);
634static SENSOR_DEVICE_ATTR(fan2_alarm, S_IRUGO, show_alarm, NULL, 7);
635
636static ssize_t show_name(struct device *dev, struct device_attribute
637 *devattr, char *buf)
638{
639 struct vt8231_data *data = dev_get_drvdata(dev);
640 return sprintf(buf, "%s\n", data->name);
641}
642static DEVICE_ATTR(name, S_IRUGO, show_name, NULL);
643
644static struct attribute *vt8231_attributes_temps[6][5] = {
645 {
646 &dev_attr_temp1_input.attr,
647 &dev_attr_temp1_max_hyst.attr,
648 &dev_attr_temp1_max.attr,
649 &sensor_dev_attr_temp1_alarm.dev_attr.attr,
650 NULL
651 }, {
652 &sensor_dev_attr_temp2_input.dev_attr.attr,
653 &sensor_dev_attr_temp2_max_hyst.dev_attr.attr,
654 &sensor_dev_attr_temp2_max.dev_attr.attr,
655 &sensor_dev_attr_temp2_alarm.dev_attr.attr,
656 NULL
657 }, {
658 &sensor_dev_attr_temp3_input.dev_attr.attr,
659 &sensor_dev_attr_temp3_max_hyst.dev_attr.attr,
660 &sensor_dev_attr_temp3_max.dev_attr.attr,
661 &sensor_dev_attr_temp3_alarm.dev_attr.attr,
662 NULL
663 }, {
664 &sensor_dev_attr_temp4_input.dev_attr.attr,
665 &sensor_dev_attr_temp4_max_hyst.dev_attr.attr,
666 &sensor_dev_attr_temp4_max.dev_attr.attr,
667 &sensor_dev_attr_temp4_alarm.dev_attr.attr,
668 NULL
669 }, {
670 &sensor_dev_attr_temp5_input.dev_attr.attr,
671 &sensor_dev_attr_temp5_max_hyst.dev_attr.attr,
672 &sensor_dev_attr_temp5_max.dev_attr.attr,
673 &sensor_dev_attr_temp5_alarm.dev_attr.attr,
674 NULL
675 }, {
676 &sensor_dev_attr_temp6_input.dev_attr.attr,
677 &sensor_dev_attr_temp6_max_hyst.dev_attr.attr,
678 &sensor_dev_attr_temp6_max.dev_attr.attr,
679 &sensor_dev_attr_temp6_alarm.dev_attr.attr,
680 NULL
681 }
682};
683
684static const struct attribute_group vt8231_group_temps[6] = {
685 { .attrs = vt8231_attributes_temps[0] },
686 { .attrs = vt8231_attributes_temps[1] },
687 { .attrs = vt8231_attributes_temps[2] },
688 { .attrs = vt8231_attributes_temps[3] },
689 { .attrs = vt8231_attributes_temps[4] },
690 { .attrs = vt8231_attributes_temps[5] },
691};
692
693static struct attribute *vt8231_attributes_volts[6][5] = {
694 {
695 &sensor_dev_attr_in0_input.dev_attr.attr,
696 &sensor_dev_attr_in0_min.dev_attr.attr,
697 &sensor_dev_attr_in0_max.dev_attr.attr,
698 &sensor_dev_attr_in0_alarm.dev_attr.attr,
699 NULL
700 }, {
701 &sensor_dev_attr_in1_input.dev_attr.attr,
702 &sensor_dev_attr_in1_min.dev_attr.attr,
703 &sensor_dev_attr_in1_max.dev_attr.attr,
704 &sensor_dev_attr_in1_alarm.dev_attr.attr,
705 NULL
706 }, {
707 &sensor_dev_attr_in2_input.dev_attr.attr,
708 &sensor_dev_attr_in2_min.dev_attr.attr,
709 &sensor_dev_attr_in2_max.dev_attr.attr,
710 &sensor_dev_attr_in2_alarm.dev_attr.attr,
711 NULL
712 }, {
713 &sensor_dev_attr_in3_input.dev_attr.attr,
714 &sensor_dev_attr_in3_min.dev_attr.attr,
715 &sensor_dev_attr_in3_max.dev_attr.attr,
716 &sensor_dev_attr_in3_alarm.dev_attr.attr,
717 NULL
718 }, {
719 &sensor_dev_attr_in4_input.dev_attr.attr,
720 &sensor_dev_attr_in4_min.dev_attr.attr,
721 &sensor_dev_attr_in4_max.dev_attr.attr,
722 &sensor_dev_attr_in4_alarm.dev_attr.attr,
723 NULL
724 }, {
725 &dev_attr_in5_input.attr,
726 &dev_attr_in5_min.attr,
727 &dev_attr_in5_max.attr,
728 &sensor_dev_attr_in5_alarm.dev_attr.attr,
729 NULL
730 }
731};
732
733static const struct attribute_group vt8231_group_volts[6] = {
734 { .attrs = vt8231_attributes_volts[0] },
735 { .attrs = vt8231_attributes_volts[1] },
736 { .attrs = vt8231_attributes_volts[2] },
737 { .attrs = vt8231_attributes_volts[3] },
738 { .attrs = vt8231_attributes_volts[4] },
739 { .attrs = vt8231_attributes_volts[5] },
740};
741
742static struct attribute *vt8231_attributes[] = {
743 &sensor_dev_attr_fan1_input.dev_attr.attr,
744 &sensor_dev_attr_fan2_input.dev_attr.attr,
745 &sensor_dev_attr_fan1_min.dev_attr.attr,
746 &sensor_dev_attr_fan2_min.dev_attr.attr,
747 &sensor_dev_attr_fan1_div.dev_attr.attr,
748 &sensor_dev_attr_fan2_div.dev_attr.attr,
749 &sensor_dev_attr_fan1_alarm.dev_attr.attr,
750 &sensor_dev_attr_fan2_alarm.dev_attr.attr,
751 &dev_attr_alarms.attr,
752 &dev_attr_name.attr,
753 NULL
754};
755
756static const struct attribute_group vt8231_group = {
757 .attrs = vt8231_attributes,
758};
759
760static struct platform_driver vt8231_driver = {
761 .driver = {
762 .name = "vt8231",
763 },
764 .probe = vt8231_probe,
765 .remove = vt8231_remove,
766};
767
768static const struct pci_device_id 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 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 (!devm_request_region(&pdev->dev, res->start, VT8231_EXTENT,
793 vt8231_driver.driver.name)) {
794 dev_err(&pdev->dev, "Region 0x%lx-0x%lx already in use!\n",
795 (unsigned long)res->start, (unsigned long)res->end);
796 return -ENODEV;
797 }
798
799 data = devm_kzalloc(&pdev->dev, sizeof(struct vt8231_data), GFP_KERNEL);
800 if (!data)
801 return -ENOMEM;
802
803 platform_set_drvdata(pdev, data);
804 data->addr = res->start;
805 data->name = "vt8231";
806
807 mutex_init(&data->update_lock);
808 vt8231_init_device(data);
809
810 /* Register sysfs hooks */
811 err = sysfs_create_group(&pdev->dev.kobj, &vt8231_group);
812 if (err)
813 return err;
814
815 /* Must update device information to find out the config field */
816 data->uch_config = vt8231_read_value(data, VT8231_REG_UCH_CONFIG);
817
818 for (i = 0; i < ARRAY_SIZE(vt8231_group_temps); i++) {
819 if (ISTEMP(i, data->uch_config)) {
820 err = sysfs_create_group(&pdev->dev.kobj,
821 &vt8231_group_temps[i]);
822 if (err)
823 goto exit_remove_files;
824 }
825 }
826
827 for (i = 0; i < ARRAY_SIZE(vt8231_group_volts); i++) {
828 if (ISVOLT(i, data->uch_config)) {
829 err = sysfs_create_group(&pdev->dev.kobj,
830 &vt8231_group_volts[i]);
831 if (err)
832 goto exit_remove_files;
833 }
834 }
835
836 data->hwmon_dev = hwmon_device_register(&pdev->dev);
837 if (IS_ERR(data->hwmon_dev)) {
838 err = PTR_ERR(data->hwmon_dev);
839 goto exit_remove_files;
840 }
841 return 0;
842
843exit_remove_files:
844 for (i = 0; i < ARRAY_SIZE(vt8231_group_volts); i++)
845 sysfs_remove_group(&pdev->dev.kobj, &vt8231_group_volts[i]);
846
847 for (i = 0; i < ARRAY_SIZE(vt8231_group_temps); i++)
848 sysfs_remove_group(&pdev->dev.kobj, &vt8231_group_temps[i]);
849
850 sysfs_remove_group(&pdev->dev.kobj, &vt8231_group);
851 return err;
852}
853
854static int vt8231_remove(struct platform_device *pdev)
855{
856 struct vt8231_data *data = platform_get_drvdata(pdev);
857 int i;
858
859 hwmon_device_unregister(data->hwmon_dev);
860
861 for (i = 0; i < ARRAY_SIZE(vt8231_group_volts); i++)
862 sysfs_remove_group(&pdev->dev.kobj, &vt8231_group_volts[i]);
863
864 for (i = 0; i < ARRAY_SIZE(vt8231_group_temps); i++)
865 sysfs_remove_group(&pdev->dev.kobj, &vt8231_group_temps[i]);
866
867 sysfs_remove_group(&pdev->dev.kobj, &vt8231_group);
868
869 return 0;
870}
871
872static void vt8231_init_device(struct vt8231_data *data)
873{
874 vt8231_write_value(data, VT8231_REG_TEMP1_CONFIG, 0);
875 vt8231_write_value(data, VT8231_REG_TEMP2_CONFIG, 0);
876}
877
878static struct vt8231_data *vt8231_update_device(struct device *dev)
879{
880 struct vt8231_data *data = dev_get_drvdata(dev);
881 int i;
882 u16 low;
883
884 mutex_lock(&data->update_lock);
885
886 if (time_after(jiffies, data->last_updated + HZ + HZ / 2)
887 || !data->valid) {
888 for (i = 0; i < 6; i++) {
889 if (ISVOLT(i, data->uch_config)) {
890 data->in[i] = vt8231_read_value(data,
891 regvolt[i]);
892 data->in_min[i] = vt8231_read_value(data,
893 regvoltmin[i]);
894 data->in_max[i] = vt8231_read_value(data,
895 regvoltmax[i]);
896 }
897 }
898 for (i = 0; i < 2; i++) {
899 data->fan[i] = vt8231_read_value(data,
900 VT8231_REG_FAN(i));
901 data->fan_min[i] = vt8231_read_value(data,
902 VT8231_REG_FAN_MIN(i));
903 }
904
905 low = vt8231_read_value(data, VT8231_REG_TEMP_LOW01);
906 low = (low >> 6) | ((low & 0x30) >> 2)
907 | (vt8231_read_value(data, VT8231_REG_TEMP_LOW25) << 4);
908 for (i = 0; i < 6; i++) {
909 if (ISTEMP(i, data->uch_config)) {
910 data->temp[i] = (vt8231_read_value(data,
911 regtemp[i]) << 2)
912 | ((low >> (2 * i)) & 0x03);
913 data->temp_max[i] = vt8231_read_value(data,
914 regtempmax[i]);
915 data->temp_min[i] = vt8231_read_value(data,
916 regtempmin[i]);
917 }
918 }
919
920 i = vt8231_read_value(data, VT8231_REG_FANDIV);
921 data->fan_div[0] = (i >> 4) & 0x03;
922 data->fan_div[1] = i >> 6;
923 data->alarms = vt8231_read_value(data, VT8231_REG_ALARM1) |
924 (vt8231_read_value(data, VT8231_REG_ALARM2) << 8);
925
926 /* Set alarm flags correctly */
927 if (!data->fan[0] && data->fan_min[0])
928 data->alarms |= 0x40;
929 else if (data->fan[0] && !data->fan_min[0])
930 data->alarms &= ~0x40;
931
932 if (!data->fan[1] && data->fan_min[1])
933 data->alarms |= 0x80;
934 else if (data->fan[1] && !data->fan_min[1])
935 data->alarms &= ~0x80;
936
937 data->last_updated = jiffies;
938 data->valid = 1;
939 }
940
941 mutex_unlock(&data->update_lock);
942
943 return data;
944}
945
946static int vt8231_device_add(unsigned short address)
947{
948 struct resource res = {
949 .start = address,
950 .end = address + VT8231_EXTENT - 1,
951 .name = "vt8231",
952 .flags = IORESOURCE_IO,
953 };
954 int err;
955
956 err = acpi_check_resource_conflict(&res);
957 if (err)
958 goto exit;
959
960 pdev = platform_device_alloc("vt8231", address);
961 if (!pdev) {
962 err = -ENOMEM;
963 pr_err("Device allocation failed\n");
964 goto exit;
965 }
966
967 err = platform_device_add_resources(pdev, &res, 1);
968 if (err) {
969 pr_err("Device resource addition failed (%d)\n", err);
970 goto exit_device_put;
971 }
972
973 err = platform_device_add(pdev);
974 if (err) {
975 pr_err("Device addition failed (%d)\n", err);
976 goto exit_device_put;
977 }
978
979 return 0;
980
981exit_device_put:
982 platform_device_put(pdev);
983exit:
984 return err;
985}
986
987static int vt8231_pci_probe(struct pci_dev *dev,
988 const struct pci_device_id *id)
989{
990 u16 address, val;
991 if (force_addr) {
992 address = force_addr & 0xff00;
993 dev_warn(&dev->dev, "Forcing ISA address 0x%x\n",
994 address);
995
996 if (PCIBIOS_SUCCESSFUL !=
997 pci_write_config_word(dev, VT8231_BASE_REG, address | 1))
998 return -ENODEV;
999 }
1000
1001 if (PCIBIOS_SUCCESSFUL != pci_read_config_word(dev, VT8231_BASE_REG,
1002 &val))
1003 return -ENODEV;
1004
1005 address = val & ~(VT8231_EXTENT - 1);
1006 if (address == 0) {
1007 dev_err(&dev->dev, "base address not set - upgrade BIOS or use force_addr=0xaddr\n");
1008 return -ENODEV;
1009 }
1010
1011 if (PCIBIOS_SUCCESSFUL != pci_read_config_word(dev, VT8231_ENABLE_REG,
1012 &val))
1013 return -ENODEV;
1014
1015 if (!(val & 0x0001)) {
1016 dev_warn(&dev->dev, "enabling sensors\n");
1017 if (PCIBIOS_SUCCESSFUL !=
1018 pci_write_config_word(dev, VT8231_ENABLE_REG,
1019 val | 0x0001))
1020 return -ENODEV;
1021 }
1022
1023 if (platform_driver_register(&vt8231_driver))
1024 goto exit;
1025
1026 /* Sets global pdev as a side effect */
1027 if (vt8231_device_add(address))
1028 goto exit_unregister;
1029
1030 /*
1031 * Always return failure here. This is to allow other drivers to bind
1032 * to this pci device. We don't really want to have control over the
1033 * pci device, we only wanted to read as few register values from it.
1034 */
1035
1036 /*
1037 * We do, however, mark ourselves as using the PCI device to stop it
1038 * getting unloaded.
1039 */
1040 s_bridge = pci_dev_get(dev);
1041 return -ENODEV;
1042
1043exit_unregister:
1044 platform_driver_unregister(&vt8231_driver);
1045exit:
1046 return -ENODEV;
1047}
1048
1049static int __init sm_vt8231_init(void)
1050{
1051 return pci_register_driver(&vt8231_pci_driver);
1052}
1053
1054static void __exit sm_vt8231_exit(void)
1055{
1056 pci_unregister_driver(&vt8231_pci_driver);
1057 if (s_bridge != NULL) {
1058 platform_device_unregister(pdev);
1059 platform_driver_unregister(&vt8231_driver);
1060 pci_dev_put(s_bridge);
1061 s_bridge = NULL;
1062 }
1063}
1064
1065MODULE_AUTHOR("Roger Lucas <vt8231@hiddenengine.co.uk>");
1066MODULE_DESCRIPTION("VT8231 sensors");
1067MODULE_LICENSE("GPL");
1068
1069module_init(sm_vt8231_init);
1070module_exit(sm_vt8231_exit);