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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/* Supports VIA VT8231 South Bridge embedded sensors
25*/
26
27#define pr_fmt(fmt) KBUILD_MODNAME ": " fmt
28
29#include <linux/module.h>
30#include <linux/init.h>
31#include <linux/slab.h>
32#include <linux/pci.h>
33#include <linux/jiffies.h>
34#include <linux/platform_device.h>
35#include <linux/hwmon.h>
36#include <linux/hwmon-sysfs.h>
37#include <linux/hwmon-vid.h>
38#include <linux/err.h>
39#include <linux/mutex.h>
40#include <linux/acpi.h>
41#include <linux/io.h>
42
43static int force_addr;
44module_param(force_addr, int, 0);
45MODULE_PARM_DESC(force_addr, "Initialize the base address of the sensors");
46
47static struct platform_device *pdev;
48
49#define VT8231_EXTENT 0x80
50#define VT8231_BASE_REG 0x70
51#define VT8231_ENABLE_REG 0x74
52
53/* The VT8231 registers
54
55 The reset value for the input channel configuration is used (Reg 0x4A=0x07)
56 which sets the selected inputs marked with '*' below if multiple options are
57 possible:
58
59 Voltage Mode Temperature Mode
60 Sensor Linux Id Linux Id VIA Id
61 -------- -------- -------- ------
62 CPU Diode N/A temp1 0
63 UIC1 in0 temp2 * 1
64 UIC2 in1 * temp3 2
65 UIC3 in2 * temp4 3
66 UIC4 in3 * temp5 4
67 UIC5 in4 * temp6 5
68 3.3V in5 N/A
69
70 Note that the BIOS may set the configuration register to a different value
71 to match the motherboard configuration.
72*/
73
74/* fans numbered 0-1 */
75#define VT8231_REG_FAN_MIN(nr) (0x3b + (nr))
76#define VT8231_REG_FAN(nr) (0x29 + (nr))
77
78/* Voltage inputs numbered 0-5 */
79
80static const u8 regvolt[] = { 0x21, 0x22, 0x23, 0x24, 0x25, 0x26 };
81static const u8 regvoltmax[] = { 0x3d, 0x2b, 0x2d, 0x2f, 0x31, 0x33 };
82static const u8 regvoltmin[] = { 0x3e, 0x2c, 0x2e, 0x30, 0x32, 0x34 };
83
84/* Temperatures are numbered 1-6 according to the Linux kernel specification.
85**
86** In the VIA datasheet, however, the temperatures are numbered from zero.
87** Since it is important that this driver can easily be compared to the VIA
88** datasheet, we will use the VIA numbering within this driver and map the
89** kernel sysfs device name to the VIA number in the sysfs callback.
90*/
91
92#define VT8231_REG_TEMP_LOW01 0x49
93#define VT8231_REG_TEMP_LOW25 0x4d
94
95static const u8 regtemp[] = { 0x1f, 0x21, 0x22, 0x23, 0x24, 0x25 };
96static const u8 regtempmax[] = { 0x39, 0x3d, 0x2b, 0x2d, 0x2f, 0x31 };
97static const u8 regtempmin[] = { 0x3a, 0x3e, 0x2c, 0x2e, 0x30, 0x32 };
98
99#define TEMP_FROM_REG(reg) (((253 * 4 - (reg)) * 550 + 105) / 210)
100#define TEMP_MAXMIN_FROM_REG(reg) (((253 - (reg)) * 2200 + 105) / 210)
101#define TEMP_MAXMIN_TO_REG(val) (253 - ((val) * 210 + 1100) / 2200)
102
103#define VT8231_REG_CONFIG 0x40
104#define VT8231_REG_ALARM1 0x41
105#define VT8231_REG_ALARM2 0x42
106#define VT8231_REG_FANDIV 0x47
107#define VT8231_REG_UCH_CONFIG 0x4a
108#define VT8231_REG_TEMP1_CONFIG 0x4b
109#define VT8231_REG_TEMP2_CONFIG 0x4c
110
111/* temps 0-5 as numbered in VIA datasheet - see later for mapping to Linux
112** numbering
113*/
114#define ISTEMP(i, ch_config) ((i) == 0 ? 1 : \
115 ((ch_config) >> ((i)+1)) & 0x01)
116/* voltages 0-5 */
117#define ISVOLT(i, ch_config) ((i) == 5 ? 1 : \
118 !(((ch_config) >> ((i)+2)) & 0x01))
119
120#define DIV_FROM_REG(val) (1 << (val))
121
122/* NB The values returned here are NOT temperatures. The calibration curves
123** for the thermistor curves are board-specific and must go in the
124** sensors.conf file. Temperature sensors are actually ten bits, but the
125** VIA datasheet only considers the 8 MSBs obtained from the regtemp[]
126** register. The temperature value returned should have a magnitude of 3,
127** so we use the VIA scaling as the "true" scaling and use the remaining 2
128** LSBs as fractional precision.
129**
130** All the on-chip hardware temperature comparisons for the alarms are only
131** 8-bits wide, and compare against the 8 MSBs of the temperature. The bits
132** in the registers VT8231_REG_TEMP_LOW01 and VT8231_REG_TEMP_LOW25 are
133** ignored.
134*/
135
136/******** FAN RPM CONVERSIONS ********
137** This chip saturates back at 0, not at 255 like many the other chips.
138** So, 0 means 0 RPM
139*/
140static inline u8 FAN_TO_REG(long rpm, int div)
141{
142 if (rpm == 0)
143 return 0;
144 return SENSORS_LIMIT(1310720 / (rpm * div), 1, 255);
145}
146
147#define FAN_FROM_REG(val, div) ((val) == 0 ? 0 : 1310720 / ((val) * (div)))
148
149struct vt8231_data {
150 unsigned short addr;
151 const char *name;
152
153 struct mutex update_lock;
154 struct device *hwmon_dev;
155 char valid; /* !=0 if following fields are valid */
156 unsigned long last_updated; /* In jiffies */
157
158 u8 in[6]; /* Register value */
159 u8 in_max[6]; /* Register value */
160 u8 in_min[6]; /* Register value */
161 u16 temp[6]; /* Register value 10 bit, right aligned */
162 u8 temp_max[6]; /* Register value */
163 u8 temp_min[6]; /* Register value */
164 u8 fan[2]; /* Register value */
165 u8 fan_min[2]; /* Register value */
166 u8 fan_div[2]; /* Register encoding, shifted right */
167 u16 alarms; /* Register encoding */
168 u8 uch_config;
169};
170
171static struct pci_dev *s_bridge;
172static int vt8231_probe(struct platform_device *pdev);
173static int __devexit vt8231_remove(struct platform_device *pdev);
174static struct vt8231_data *vt8231_update_device(struct device *dev);
175static void vt8231_init_device(struct vt8231_data *data);
176
177static inline int vt8231_read_value(struct vt8231_data *data, u8 reg)
178{
179 return inb_p(data->addr + reg);
180}
181
182static inline void vt8231_write_value(struct vt8231_data *data, u8 reg,
183 u8 value)
184{
185 outb_p(value, data->addr + reg);
186}
187
188/* following are the sysfs callback functions */
189static ssize_t show_in(struct device *dev, struct device_attribute *attr,
190 char *buf)
191{
192 struct sensor_device_attribute *sensor_attr = to_sensor_dev_attr(attr);
193 int nr = sensor_attr->index;
194 struct vt8231_data *data = vt8231_update_device(dev);
195
196 return sprintf(buf, "%d\n", ((data->in[nr] - 3) * 10000) / 958);
197}
198
199static ssize_t show_in_min(struct device *dev, struct device_attribute *attr,
200 char *buf)
201{
202 struct sensor_device_attribute *sensor_attr = to_sensor_dev_attr(attr);
203 int nr = sensor_attr->index;
204 struct vt8231_data *data = vt8231_update_device(dev);
205
206 return sprintf(buf, "%d\n", ((data->in_min[nr] - 3) * 10000) / 958);
207}
208
209static ssize_t show_in_max(struct device *dev, struct device_attribute *attr,
210 char *buf)
211{
212 struct sensor_device_attribute *sensor_attr = to_sensor_dev_attr(attr);
213 int nr = sensor_attr->index;
214 struct vt8231_data *data = vt8231_update_device(dev);
215
216 return sprintf(buf, "%d\n", (((data->in_max[nr] - 3) * 10000) / 958));
217}
218
219static ssize_t set_in_min(struct device *dev, struct device_attribute *attr,
220 const char *buf, size_t count)
221{
222 struct sensor_device_attribute *sensor_attr = to_sensor_dev_attr(attr);
223 int nr = sensor_attr->index;
224 struct vt8231_data *data = dev_get_drvdata(dev);
225 unsigned long val = simple_strtoul(buf, NULL, 10);
226
227 mutex_lock(&data->update_lock);
228 data->in_min[nr] = SENSORS_LIMIT(((val * 958) / 10000) + 3, 0, 255);
229 vt8231_write_value(data, regvoltmin[nr], data->in_min[nr]);
230 mutex_unlock(&data->update_lock);
231 return count;
232}
233
234static ssize_t set_in_max(struct device *dev, struct device_attribute *attr,
235 const char *buf, size_t count)
236{
237 struct sensor_device_attribute *sensor_attr = to_sensor_dev_attr(attr);
238 int nr = sensor_attr->index;
239 struct vt8231_data *data = dev_get_drvdata(dev);
240 unsigned long val = simple_strtoul(buf, NULL, 10);
241
242 mutex_lock(&data->update_lock);
243 data->in_max[nr] = SENSORS_LIMIT(((val * 958) / 10000) + 3, 0, 255);
244 vt8231_write_value(data, regvoltmax[nr], data->in_max[nr]);
245 mutex_unlock(&data->update_lock);
246 return count;
247}
248
249/* Special case for input 5 as this has 3.3V scaling built into the chip */
250static ssize_t show_in5(struct device *dev, struct device_attribute *attr,
251 char *buf)
252{
253 struct vt8231_data *data = vt8231_update_device(dev);
254
255 return sprintf(buf, "%d\n",
256 (((data->in[5] - 3) * 10000 * 54) / (958 * 34)));
257}
258
259static ssize_t show_in5_min(struct device *dev, struct device_attribute *attr,
260 char *buf)
261{
262 struct vt8231_data *data = vt8231_update_device(dev);
263
264 return sprintf(buf, "%d\n",
265 (((data->in_min[5] - 3) * 10000 * 54) / (958 * 34)));
266}
267
268static ssize_t show_in5_max(struct device *dev, struct device_attribute *attr,
269 char *buf)
270{
271 struct vt8231_data *data = vt8231_update_device(dev);
272
273 return sprintf(buf, "%d\n",
274 (((data->in_max[5] - 3) * 10000 * 54) / (958 * 34)));
275}
276
277static ssize_t set_in5_min(struct device *dev, struct device_attribute *attr,
278 const char *buf, size_t count)
279{
280 struct vt8231_data *data = dev_get_drvdata(dev);
281 unsigned long val = simple_strtoul(buf, NULL, 10);
282
283 mutex_lock(&data->update_lock);
284 data->in_min[5] = SENSORS_LIMIT(((val * 958 * 34) / (10000 * 54)) + 3,
285 0, 255);
286 vt8231_write_value(data, regvoltmin[5], data->in_min[5]);
287 mutex_unlock(&data->update_lock);
288 return count;
289}
290
291static ssize_t set_in5_max(struct device *dev, struct device_attribute *attr,
292 const char *buf, size_t count)
293{
294 struct vt8231_data *data = dev_get_drvdata(dev);
295 unsigned long val = simple_strtoul(buf, NULL, 10);
296
297 mutex_lock(&data->update_lock);
298 data->in_max[5] = SENSORS_LIMIT(((val * 958 * 34) / (10000 * 54)) + 3,
299 0, 255);
300 vt8231_write_value(data, regvoltmax[5], data->in_max[5]);
301 mutex_unlock(&data->update_lock);
302 return count;
303}
304
305#define define_voltage_sysfs(offset) \
306static SENSOR_DEVICE_ATTR(in##offset##_input, S_IRUGO, \
307 show_in, NULL, offset); \
308static SENSOR_DEVICE_ATTR(in##offset##_min, S_IRUGO | S_IWUSR, \
309 show_in_min, set_in_min, offset); \
310static SENSOR_DEVICE_ATTR(in##offset##_max, S_IRUGO | S_IWUSR, \
311 show_in_max, set_in_max, offset)
312
313define_voltage_sysfs(0);
314define_voltage_sysfs(1);
315define_voltage_sysfs(2);
316define_voltage_sysfs(3);
317define_voltage_sysfs(4);
318
319static DEVICE_ATTR(in5_input, S_IRUGO, show_in5, NULL);
320static DEVICE_ATTR(in5_min, S_IRUGO | S_IWUSR, show_in5_min, set_in5_min);
321static DEVICE_ATTR(in5_max, S_IRUGO | S_IWUSR, show_in5_max, set_in5_max);
322
323/* Temperatures */
324static ssize_t show_temp0(struct device *dev, struct device_attribute *attr,
325 char *buf)
326{
327 struct vt8231_data *data = vt8231_update_device(dev);
328 return sprintf(buf, "%d\n", data->temp[0] * 250);
329}
330
331static ssize_t show_temp0_max(struct device *dev, struct device_attribute *attr,
332 char *buf)
333{
334 struct vt8231_data *data = vt8231_update_device(dev);
335 return sprintf(buf, "%d\n", data->temp_max[0] * 1000);
336}
337
338static ssize_t show_temp0_min(struct device *dev, struct device_attribute *attr,
339 char *buf)
340{
341 struct vt8231_data *data = vt8231_update_device(dev);
342 return sprintf(buf, "%d\n", data->temp_min[0] * 1000);
343}
344
345static ssize_t set_temp0_max(struct device *dev, struct device_attribute *attr,
346 const char *buf, size_t count)
347{
348 struct vt8231_data *data = dev_get_drvdata(dev);
349 int val = simple_strtol(buf, NULL, 10);
350
351 mutex_lock(&data->update_lock);
352 data->temp_max[0] = SENSORS_LIMIT((val + 500) / 1000, 0, 255);
353 vt8231_write_value(data, regtempmax[0], data->temp_max[0]);
354 mutex_unlock(&data->update_lock);
355 return count;
356}
357static ssize_t set_temp0_min(struct device *dev, struct device_attribute *attr,
358 const char *buf, size_t count)
359{
360 struct vt8231_data *data = dev_get_drvdata(dev);
361 int val = simple_strtol(buf, NULL, 10);
362
363 mutex_lock(&data->update_lock);
364 data->temp_min[0] = SENSORS_LIMIT((val + 500) / 1000, 0, 255);
365 vt8231_write_value(data, regtempmin[0], data->temp_min[0]);
366 mutex_unlock(&data->update_lock);
367 return count;
368}
369
370static ssize_t show_temp(struct device *dev, struct device_attribute *attr,
371 char *buf)
372{
373 struct sensor_device_attribute *sensor_attr = to_sensor_dev_attr(attr);
374 int nr = sensor_attr->index;
375 struct vt8231_data *data = vt8231_update_device(dev);
376 return sprintf(buf, "%d\n", TEMP_FROM_REG(data->temp[nr]));
377}
378
379static ssize_t show_temp_max(struct device *dev, struct device_attribute *attr,
380 char *buf)
381{
382 struct sensor_device_attribute *sensor_attr = to_sensor_dev_attr(attr);
383 int nr = sensor_attr->index;
384 struct vt8231_data *data = vt8231_update_device(dev);
385 return sprintf(buf, "%d\n", TEMP_MAXMIN_FROM_REG(data->temp_max[nr]));
386}
387
388static ssize_t show_temp_min(struct device *dev, struct device_attribute *attr,
389 char *buf)
390{
391 struct sensor_device_attribute *sensor_attr = to_sensor_dev_attr(attr);
392 int nr = sensor_attr->index;
393 struct vt8231_data *data = vt8231_update_device(dev);
394 return sprintf(buf, "%d\n", TEMP_MAXMIN_FROM_REG(data->temp_min[nr]));
395}
396
397static ssize_t set_temp_max(struct device *dev, struct device_attribute *attr,
398 const char *buf, size_t count)
399{
400 struct sensor_device_attribute *sensor_attr = to_sensor_dev_attr(attr);
401 int nr = sensor_attr->index;
402 struct vt8231_data *data = dev_get_drvdata(dev);
403 int val = simple_strtol(buf, NULL, 10);
404
405 mutex_lock(&data->update_lock);
406 data->temp_max[nr] = SENSORS_LIMIT(TEMP_MAXMIN_TO_REG(val), 0, 255);
407 vt8231_write_value(data, regtempmax[nr], data->temp_max[nr]);
408 mutex_unlock(&data->update_lock);
409 return count;
410}
411static ssize_t set_temp_min(struct device *dev, struct device_attribute *attr,
412 const char *buf, size_t count)
413{
414 struct sensor_device_attribute *sensor_attr = to_sensor_dev_attr(attr);
415 int nr = sensor_attr->index;
416 struct vt8231_data *data = dev_get_drvdata(dev);
417 int val = simple_strtol(buf, NULL, 10);
418
419 mutex_lock(&data->update_lock);
420 data->temp_min[nr] = SENSORS_LIMIT(TEMP_MAXMIN_TO_REG(val), 0, 255);
421 vt8231_write_value(data, regtempmin[nr], data->temp_min[nr]);
422 mutex_unlock(&data->update_lock);
423 return count;
424}
425
426/* Note that these map the Linux temperature sensor numbering (1-6) to the VIA
427** temperature sensor numbering (0-5)
428*/
429#define define_temperature_sysfs(offset) \
430static SENSOR_DEVICE_ATTR(temp##offset##_input, S_IRUGO, \
431 show_temp, NULL, offset - 1); \
432static SENSOR_DEVICE_ATTR(temp##offset##_max, S_IRUGO | S_IWUSR, \
433 show_temp_max, set_temp_max, offset - 1); \
434static SENSOR_DEVICE_ATTR(temp##offset##_max_hyst, S_IRUGO | S_IWUSR, \
435 show_temp_min, set_temp_min, offset - 1)
436
437static DEVICE_ATTR(temp1_input, S_IRUGO, show_temp0, NULL);
438static DEVICE_ATTR(temp1_max, S_IRUGO | S_IWUSR, show_temp0_max, set_temp0_max);
439static DEVICE_ATTR(temp1_max_hyst, S_IRUGO | S_IWUSR, show_temp0_min, set_temp0_min);
440
441define_temperature_sysfs(2);
442define_temperature_sysfs(3);
443define_temperature_sysfs(4);
444define_temperature_sysfs(5);
445define_temperature_sysfs(6);
446
447/* Fans */
448static ssize_t show_fan(struct device *dev, struct device_attribute *attr,
449 char *buf)
450{
451 struct sensor_device_attribute *sensor_attr = to_sensor_dev_attr(attr);
452 int nr = sensor_attr->index;
453 struct vt8231_data *data = vt8231_update_device(dev);
454 return sprintf(buf, "%d\n", FAN_FROM_REG(data->fan[nr],
455 DIV_FROM_REG(data->fan_div[nr])));
456}
457
458static ssize_t show_fan_min(struct device *dev, struct device_attribute *attr,
459 char *buf)
460{
461 struct sensor_device_attribute *sensor_attr = to_sensor_dev_attr(attr);
462 int nr = sensor_attr->index;
463 struct vt8231_data *data = vt8231_update_device(dev);
464 return sprintf(buf, "%d\n", FAN_FROM_REG(data->fan_min[nr],
465 DIV_FROM_REG(data->fan_div[nr])));
466}
467
468static ssize_t show_fan_div(struct device *dev, struct device_attribute *attr,
469 char *buf)
470{
471 struct sensor_device_attribute *sensor_attr = to_sensor_dev_attr(attr);
472 int nr = sensor_attr->index;
473 struct vt8231_data *data = vt8231_update_device(dev);
474 return sprintf(buf, "%d\n", DIV_FROM_REG(data->fan_div[nr]));
475}
476
477static ssize_t set_fan_min(struct device *dev, struct device_attribute *attr,
478 const char *buf, size_t count)
479{
480 struct sensor_device_attribute *sensor_attr = to_sensor_dev_attr(attr);
481 int nr = sensor_attr->index;
482 struct vt8231_data *data = dev_get_drvdata(dev);
483 int val = simple_strtoul(buf, NULL, 10);
484
485 mutex_lock(&data->update_lock);
486 data->fan_min[nr] = FAN_TO_REG(val, DIV_FROM_REG(data->fan_div[nr]));
487 vt8231_write_value(data, VT8231_REG_FAN_MIN(nr), data->fan_min[nr]);
488 mutex_unlock(&data->update_lock);
489 return count;
490}
491
492static ssize_t set_fan_div(struct device *dev, struct device_attribute *attr,
493 const char *buf, size_t count)
494{
495 struct vt8231_data *data = dev_get_drvdata(dev);
496 struct sensor_device_attribute *sensor_attr = to_sensor_dev_attr(attr);
497 unsigned long val = simple_strtoul(buf, NULL, 10);
498 int nr = sensor_attr->index;
499 int old = vt8231_read_value(data, VT8231_REG_FANDIV);
500 long min = FAN_FROM_REG(data->fan_min[nr],
501 DIV_FROM_REG(data->fan_div[nr]));
502
503 mutex_lock(&data->update_lock);
504 switch (val) {
505 case 1: data->fan_div[nr] = 0; break;
506 case 2: data->fan_div[nr] = 1; break;
507 case 4: data->fan_div[nr] = 2; break;
508 case 8: data->fan_div[nr] = 3; break;
509 default:
510 dev_err(dev, "fan_div value %ld not supported. "
511 "Choose one of 1, 2, 4 or 8!\n", val);
512 mutex_unlock(&data->update_lock);
513 return -EINVAL;
514 }
515
516 /* Correct the fan minimum speed */
517 data->fan_min[nr] = FAN_TO_REG(min, DIV_FROM_REG(data->fan_div[nr]));
518 vt8231_write_value(data, VT8231_REG_FAN_MIN(nr), data->fan_min[nr]);
519
520 old = (old & 0x0f) | (data->fan_div[1] << 6) | (data->fan_div[0] << 4);
521 vt8231_write_value(data, VT8231_REG_FANDIV, old);
522 mutex_unlock(&data->update_lock);
523 return count;
524}
525
526
527#define define_fan_sysfs(offset) \
528static SENSOR_DEVICE_ATTR(fan##offset##_input, S_IRUGO, \
529 show_fan, NULL, offset - 1); \
530static SENSOR_DEVICE_ATTR(fan##offset##_div, S_IRUGO | S_IWUSR, \
531 show_fan_div, set_fan_div, offset - 1); \
532static SENSOR_DEVICE_ATTR(fan##offset##_min, S_IRUGO | S_IWUSR, \
533 show_fan_min, set_fan_min, offset - 1)
534
535define_fan_sysfs(1);
536define_fan_sysfs(2);
537
538/* Alarms */
539static ssize_t show_alarms(struct device *dev, struct device_attribute *attr,
540 char *buf)
541{
542 struct vt8231_data *data = vt8231_update_device(dev);
543 return sprintf(buf, "%d\n", data->alarms);
544}
545static DEVICE_ATTR(alarms, S_IRUGO, show_alarms, NULL);
546
547static ssize_t show_alarm(struct device *dev, struct device_attribute *attr,
548 char *buf)
549{
550 int bitnr = to_sensor_dev_attr(attr)->index;
551 struct vt8231_data *data = vt8231_update_device(dev);
552 return sprintf(buf, "%u\n", (data->alarms >> bitnr) & 1);
553}
554static SENSOR_DEVICE_ATTR(temp1_alarm, S_IRUGO, show_alarm, NULL, 4);
555static SENSOR_DEVICE_ATTR(temp2_alarm, S_IRUGO, show_alarm, NULL, 11);
556static SENSOR_DEVICE_ATTR(temp3_alarm, S_IRUGO, show_alarm, NULL, 0);
557static SENSOR_DEVICE_ATTR(temp4_alarm, S_IRUGO, show_alarm, NULL, 1);
558static SENSOR_DEVICE_ATTR(temp5_alarm, S_IRUGO, show_alarm, NULL, 3);
559static SENSOR_DEVICE_ATTR(temp6_alarm, S_IRUGO, show_alarm, NULL, 8);
560static SENSOR_DEVICE_ATTR(in0_alarm, S_IRUGO, show_alarm, NULL, 11);
561static SENSOR_DEVICE_ATTR(in1_alarm, S_IRUGO, show_alarm, NULL, 0);
562static SENSOR_DEVICE_ATTR(in2_alarm, S_IRUGO, show_alarm, NULL, 1);
563static SENSOR_DEVICE_ATTR(in3_alarm, S_IRUGO, show_alarm, NULL, 3);
564static SENSOR_DEVICE_ATTR(in4_alarm, S_IRUGO, show_alarm, NULL, 8);
565static SENSOR_DEVICE_ATTR(in5_alarm, S_IRUGO, show_alarm, NULL, 2);
566static SENSOR_DEVICE_ATTR(fan1_alarm, S_IRUGO, show_alarm, NULL, 6);
567static SENSOR_DEVICE_ATTR(fan2_alarm, S_IRUGO, show_alarm, NULL, 7);
568
569static ssize_t show_name(struct device *dev, struct device_attribute
570 *devattr, char *buf)
571{
572 struct vt8231_data *data = dev_get_drvdata(dev);
573 return sprintf(buf, "%s\n", data->name);
574}
575static DEVICE_ATTR(name, S_IRUGO, show_name, NULL);
576
577static struct attribute *vt8231_attributes_temps[6][5] = {
578 {
579 &dev_attr_temp1_input.attr,
580 &dev_attr_temp1_max_hyst.attr,
581 &dev_attr_temp1_max.attr,
582 &sensor_dev_attr_temp1_alarm.dev_attr.attr,
583 NULL
584 }, {
585 &sensor_dev_attr_temp2_input.dev_attr.attr,
586 &sensor_dev_attr_temp2_max_hyst.dev_attr.attr,
587 &sensor_dev_attr_temp2_max.dev_attr.attr,
588 &sensor_dev_attr_temp2_alarm.dev_attr.attr,
589 NULL
590 }, {
591 &sensor_dev_attr_temp3_input.dev_attr.attr,
592 &sensor_dev_attr_temp3_max_hyst.dev_attr.attr,
593 &sensor_dev_attr_temp3_max.dev_attr.attr,
594 &sensor_dev_attr_temp3_alarm.dev_attr.attr,
595 NULL
596 }, {
597 &sensor_dev_attr_temp4_input.dev_attr.attr,
598 &sensor_dev_attr_temp4_max_hyst.dev_attr.attr,
599 &sensor_dev_attr_temp4_max.dev_attr.attr,
600 &sensor_dev_attr_temp4_alarm.dev_attr.attr,
601 NULL
602 }, {
603 &sensor_dev_attr_temp5_input.dev_attr.attr,
604 &sensor_dev_attr_temp5_max_hyst.dev_attr.attr,
605 &sensor_dev_attr_temp5_max.dev_attr.attr,
606 &sensor_dev_attr_temp5_alarm.dev_attr.attr,
607 NULL
608 }, {
609 &sensor_dev_attr_temp6_input.dev_attr.attr,
610 &sensor_dev_attr_temp6_max_hyst.dev_attr.attr,
611 &sensor_dev_attr_temp6_max.dev_attr.attr,
612 &sensor_dev_attr_temp6_alarm.dev_attr.attr,
613 NULL
614 }
615};
616
617static const struct attribute_group vt8231_group_temps[6] = {
618 { .attrs = vt8231_attributes_temps[0] },
619 { .attrs = vt8231_attributes_temps[1] },
620 { .attrs = vt8231_attributes_temps[2] },
621 { .attrs = vt8231_attributes_temps[3] },
622 { .attrs = vt8231_attributes_temps[4] },
623 { .attrs = vt8231_attributes_temps[5] },
624};
625
626static struct attribute *vt8231_attributes_volts[6][5] = {
627 {
628 &sensor_dev_attr_in0_input.dev_attr.attr,
629 &sensor_dev_attr_in0_min.dev_attr.attr,
630 &sensor_dev_attr_in0_max.dev_attr.attr,
631 &sensor_dev_attr_in0_alarm.dev_attr.attr,
632 NULL
633 }, {
634 &sensor_dev_attr_in1_input.dev_attr.attr,
635 &sensor_dev_attr_in1_min.dev_attr.attr,
636 &sensor_dev_attr_in1_max.dev_attr.attr,
637 &sensor_dev_attr_in1_alarm.dev_attr.attr,
638 NULL
639 }, {
640 &sensor_dev_attr_in2_input.dev_attr.attr,
641 &sensor_dev_attr_in2_min.dev_attr.attr,
642 &sensor_dev_attr_in2_max.dev_attr.attr,
643 &sensor_dev_attr_in2_alarm.dev_attr.attr,
644 NULL
645 }, {
646 &sensor_dev_attr_in3_input.dev_attr.attr,
647 &sensor_dev_attr_in3_min.dev_attr.attr,
648 &sensor_dev_attr_in3_max.dev_attr.attr,
649 &sensor_dev_attr_in3_alarm.dev_attr.attr,
650 NULL
651 }, {
652 &sensor_dev_attr_in4_input.dev_attr.attr,
653 &sensor_dev_attr_in4_min.dev_attr.attr,
654 &sensor_dev_attr_in4_max.dev_attr.attr,
655 &sensor_dev_attr_in4_alarm.dev_attr.attr,
656 NULL
657 }, {
658 &dev_attr_in5_input.attr,
659 &dev_attr_in5_min.attr,
660 &dev_attr_in5_max.attr,
661 &sensor_dev_attr_in5_alarm.dev_attr.attr,
662 NULL
663 }
664};
665
666static const struct attribute_group vt8231_group_volts[6] = {
667 { .attrs = vt8231_attributes_volts[0] },
668 { .attrs = vt8231_attributes_volts[1] },
669 { .attrs = vt8231_attributes_volts[2] },
670 { .attrs = vt8231_attributes_volts[3] },
671 { .attrs = vt8231_attributes_volts[4] },
672 { .attrs = vt8231_attributes_volts[5] },
673};
674
675static struct attribute *vt8231_attributes[] = {
676 &sensor_dev_attr_fan1_input.dev_attr.attr,
677 &sensor_dev_attr_fan2_input.dev_attr.attr,
678 &sensor_dev_attr_fan1_min.dev_attr.attr,
679 &sensor_dev_attr_fan2_min.dev_attr.attr,
680 &sensor_dev_attr_fan1_div.dev_attr.attr,
681 &sensor_dev_attr_fan2_div.dev_attr.attr,
682 &sensor_dev_attr_fan1_alarm.dev_attr.attr,
683 &sensor_dev_attr_fan2_alarm.dev_attr.attr,
684 &dev_attr_alarms.attr,
685 &dev_attr_name.attr,
686 NULL
687};
688
689static const struct attribute_group vt8231_group = {
690 .attrs = vt8231_attributes,
691};
692
693static struct platform_driver vt8231_driver = {
694 .driver = {
695 .owner = THIS_MODULE,
696 .name = "vt8231",
697 },
698 .probe = vt8231_probe,
699 .remove = __devexit_p(vt8231_remove),
700};
701
702static const struct pci_device_id vt8231_pci_ids[] = {
703 { PCI_DEVICE(PCI_VENDOR_ID_VIA, PCI_DEVICE_ID_VIA_8231_4) },
704 { 0, }
705};
706
707MODULE_DEVICE_TABLE(pci, vt8231_pci_ids);
708
709static int __devinit vt8231_pci_probe(struct pci_dev *dev,
710 const struct pci_device_id *id);
711
712static struct pci_driver vt8231_pci_driver = {
713 .name = "vt8231",
714 .id_table = vt8231_pci_ids,
715 .probe = vt8231_pci_probe,
716};
717
718static int vt8231_probe(struct platform_device *pdev)
719{
720 struct resource *res;
721 struct vt8231_data *data;
722 int err = 0, i;
723
724 /* Reserve the ISA region */
725 res = platform_get_resource(pdev, IORESOURCE_IO, 0);
726 if (!request_region(res->start, VT8231_EXTENT,
727 vt8231_driver.driver.name)) {
728 dev_err(&pdev->dev, "Region 0x%lx-0x%lx already in use!\n",
729 (unsigned long)res->start, (unsigned long)res->end);
730 return -ENODEV;
731 }
732
733 if (!(data = kzalloc(sizeof(struct vt8231_data), GFP_KERNEL))) {
734 err = -ENOMEM;
735 goto exit_release;
736 }
737
738 platform_set_drvdata(pdev, data);
739 data->addr = res->start;
740 data->name = "vt8231";
741
742 mutex_init(&data->update_lock);
743 vt8231_init_device(data);
744
745 /* Register sysfs hooks */
746 if ((err = sysfs_create_group(&pdev->dev.kobj, &vt8231_group)))
747 goto exit_free;
748
749 /* Must update device information to find out the config field */
750 data->uch_config = vt8231_read_value(data, VT8231_REG_UCH_CONFIG);
751
752 for (i = 0; i < ARRAY_SIZE(vt8231_group_temps); i++) {
753 if (ISTEMP(i, data->uch_config)) {
754 if ((err = sysfs_create_group(&pdev->dev.kobj,
755 &vt8231_group_temps[i])))
756 goto exit_remove_files;
757 }
758 }
759
760 for (i = 0; i < ARRAY_SIZE(vt8231_group_volts); i++) {
761 if (ISVOLT(i, data->uch_config)) {
762 if ((err = sysfs_create_group(&pdev->dev.kobj,
763 &vt8231_group_volts[i])))
764 goto exit_remove_files;
765 }
766 }
767
768 data->hwmon_dev = hwmon_device_register(&pdev->dev);
769 if (IS_ERR(data->hwmon_dev)) {
770 err = PTR_ERR(data->hwmon_dev);
771 goto exit_remove_files;
772 }
773 return 0;
774
775exit_remove_files:
776 for (i = 0; i < ARRAY_SIZE(vt8231_group_volts); i++)
777 sysfs_remove_group(&pdev->dev.kobj, &vt8231_group_volts[i]);
778
779 for (i = 0; i < ARRAY_SIZE(vt8231_group_temps); i++)
780 sysfs_remove_group(&pdev->dev.kobj, &vt8231_group_temps[i]);
781
782 sysfs_remove_group(&pdev->dev.kobj, &vt8231_group);
783
784exit_free:
785 platform_set_drvdata(pdev, NULL);
786 kfree(data);
787
788exit_release:
789 release_region(res->start, VT8231_EXTENT);
790 return err;
791}
792
793static int __devexit vt8231_remove(struct platform_device *pdev)
794{
795 struct vt8231_data *data = platform_get_drvdata(pdev);
796 int i;
797
798 hwmon_device_unregister(data->hwmon_dev);
799
800 for (i = 0; i < ARRAY_SIZE(vt8231_group_volts); i++)
801 sysfs_remove_group(&pdev->dev.kobj, &vt8231_group_volts[i]);
802
803 for (i = 0; i < ARRAY_SIZE(vt8231_group_temps); i++)
804 sysfs_remove_group(&pdev->dev.kobj, &vt8231_group_temps[i]);
805
806 sysfs_remove_group(&pdev->dev.kobj, &vt8231_group);
807
808 release_region(data->addr, VT8231_EXTENT);
809 platform_set_drvdata(pdev, NULL);
810 kfree(data);
811 return 0;
812}
813
814static void vt8231_init_device(struct vt8231_data *data)
815{
816 vt8231_write_value(data, VT8231_REG_TEMP1_CONFIG, 0);
817 vt8231_write_value(data, VT8231_REG_TEMP2_CONFIG, 0);
818}
819
820static struct vt8231_data *vt8231_update_device(struct device *dev)
821{
822 struct vt8231_data *data = dev_get_drvdata(dev);
823 int i;
824 u16 low;
825
826 mutex_lock(&data->update_lock);
827
828 if (time_after(jiffies, data->last_updated + HZ + HZ / 2)
829 || !data->valid) {
830 for (i = 0; i < 6; i++) {
831 if (ISVOLT(i, data->uch_config)) {
832 data->in[i] = vt8231_read_value(data,
833 regvolt[i]);
834 data->in_min[i] = vt8231_read_value(data,
835 regvoltmin[i]);
836 data->in_max[i] = vt8231_read_value(data,
837 regvoltmax[i]);
838 }
839 }
840 for (i = 0; i < 2; i++) {
841 data->fan[i] = vt8231_read_value(data,
842 VT8231_REG_FAN(i));
843 data->fan_min[i] = vt8231_read_value(data,
844 VT8231_REG_FAN_MIN(i));
845 }
846
847 low = vt8231_read_value(data, VT8231_REG_TEMP_LOW01);
848 low = (low >> 6) | ((low & 0x30) >> 2)
849 | (vt8231_read_value(data, VT8231_REG_TEMP_LOW25) << 4);
850 for (i = 0; i < 6; i++) {
851 if (ISTEMP(i, data->uch_config)) {
852 data->temp[i] = (vt8231_read_value(data,
853 regtemp[i]) << 2)
854 | ((low >> (2 * i)) & 0x03);
855 data->temp_max[i] = vt8231_read_value(data,
856 regtempmax[i]);
857 data->temp_min[i] = vt8231_read_value(data,
858 regtempmin[i]);
859 }
860 }
861
862 i = vt8231_read_value(data, VT8231_REG_FANDIV);
863 data->fan_div[0] = (i >> 4) & 0x03;
864 data->fan_div[1] = i >> 6;
865 data->alarms = vt8231_read_value(data, VT8231_REG_ALARM1) |
866 (vt8231_read_value(data, VT8231_REG_ALARM2) << 8);
867
868 /* Set alarm flags correctly */
869 if (!data->fan[0] && data->fan_min[0]) {
870 data->alarms |= 0x40;
871 } else if (data->fan[0] && !data->fan_min[0]) {
872 data->alarms &= ~0x40;
873 }
874
875 if (!data->fan[1] && data->fan_min[1]) {
876 data->alarms |= 0x80;
877 } else if (data->fan[1] && !data->fan_min[1]) {
878 data->alarms &= ~0x80;
879 }
880
881 data->last_updated = jiffies;
882 data->valid = 1;
883 }
884
885 mutex_unlock(&data->update_lock);
886
887 return data;
888}
889
890static int __devinit vt8231_device_add(unsigned short address)
891{
892 struct resource res = {
893 .start = address,
894 .end = address + VT8231_EXTENT - 1,
895 .name = "vt8231",
896 .flags = IORESOURCE_IO,
897 };
898 int err;
899
900 err = acpi_check_resource_conflict(&res);
901 if (err)
902 goto exit;
903
904 pdev = platform_device_alloc("vt8231", address);
905 if (!pdev) {
906 err = -ENOMEM;
907 pr_err("Device allocation failed\n");
908 goto exit;
909 }
910
911 err = platform_device_add_resources(pdev, &res, 1);
912 if (err) {
913 pr_err("Device resource addition failed (%d)\n", err);
914 goto exit_device_put;
915 }
916
917 err = platform_device_add(pdev);
918 if (err) {
919 pr_err("Device addition failed (%d)\n", err);
920 goto exit_device_put;
921 }
922
923 return 0;
924
925exit_device_put:
926 platform_device_put(pdev);
927exit:
928 return err;
929}
930
931static int __devinit vt8231_pci_probe(struct pci_dev *dev,
932 const struct pci_device_id *id)
933{
934 u16 address, val;
935 if (force_addr) {
936 address = force_addr & 0xff00;
937 dev_warn(&dev->dev, "Forcing ISA address 0x%x\n",
938 address);
939
940 if (PCIBIOS_SUCCESSFUL !=
941 pci_write_config_word(dev, VT8231_BASE_REG, address | 1))
942 return -ENODEV;
943 }
944
945 if (PCIBIOS_SUCCESSFUL != pci_read_config_word(dev, VT8231_BASE_REG,
946 &val))
947 return -ENODEV;
948
949 address = val & ~(VT8231_EXTENT - 1);
950 if (address == 0) {
951 dev_err(&dev->dev, "base address not set - upgrade BIOS or use force_addr=0xaddr\n");
952 return -ENODEV;
953 }
954
955 if (PCIBIOS_SUCCESSFUL != pci_read_config_word(dev, VT8231_ENABLE_REG,
956 &val))
957 return -ENODEV;
958
959 if (!(val & 0x0001)) {
960 dev_warn(&dev->dev, "enabling sensors\n");
961 if (PCIBIOS_SUCCESSFUL !=
962 pci_write_config_word(dev, VT8231_ENABLE_REG,
963 val | 0x0001))
964 return -ENODEV;
965 }
966
967 if (platform_driver_register(&vt8231_driver))
968 goto exit;
969
970 /* Sets global pdev as a side effect */
971 if (vt8231_device_add(address))
972 goto exit_unregister;
973
974 /* Always return failure here. This is to allow other drivers to bind
975 * to this pci device. We don't really want to have control over the
976 * pci device, we only wanted to read as few register values from it.
977 */
978
979 /* We do, however, mark ourselves as using the PCI device to stop it
980 getting unloaded. */
981 s_bridge = pci_dev_get(dev);
982 return -ENODEV;
983
984exit_unregister:
985 platform_driver_unregister(&vt8231_driver);
986exit:
987 return -ENODEV;
988}
989
990static int __init sm_vt8231_init(void)
991{
992 return pci_register_driver(&vt8231_pci_driver);
993}
994
995static void __exit sm_vt8231_exit(void)
996{
997 pci_unregister_driver(&vt8231_pci_driver);
998 if (s_bridge != NULL) {
999 platform_device_unregister(pdev);
1000 platform_driver_unregister(&vt8231_driver);
1001 pci_dev_put(s_bridge);
1002 s_bridge = NULL;
1003 }
1004}
1005
1006MODULE_AUTHOR("Roger Lucas <vt8231@hiddenengine.co.uk>");
1007MODULE_DESCRIPTION("VT8231 sensors");
1008MODULE_LICENSE("GPL");
1009
1010module_init(sm_vt8231_init);
1011module_exit(sm_vt8231_exit);
1/*
2 * vt8231.c - Part of lm_sensors, Linux kernel modules
3 * for hardware monitoring
4 *
5 * Copyright (c) 2005 Roger Lucas <vt8231@hiddenengine.co.uk>
6 * Copyright (c) 2002 Mark D. Studebaker <mdsxyz123@yahoo.com>
7 * Aaron M. Marsh <amarsh@sdf.lonestar.org>
8 *
9 * This program is free software; you can redistribute it and/or modify
10 * it under the terms of the GNU General Public License as published by
11 * the Free Software Foundation; either version 2 of the License, or
12 * (at your option) any later version.
13 *
14 * This program is distributed in the hope that it will be useful,
15 * but WITHOUT ANY WARRANTY; without even the implied warranty of
16 * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
17 * GNU General Public License for more details.
18 *
19 * You should have received a copy of the GNU General Public License
20 * along with this program; if not, write to the Free Software
21 * Foundation, Inc., 675 Mass Ave, Cambridge, MA 02139, USA.
22 */
23
24/*
25 * Supports VIA VT8231 South Bridge embedded sensors
26 */
27
28#define pr_fmt(fmt) KBUILD_MODNAME ": " fmt
29
30#include <linux/module.h>
31#include <linux/init.h>
32#include <linux/slab.h>
33#include <linux/pci.h>
34#include <linux/jiffies.h>
35#include <linux/platform_device.h>
36#include <linux/hwmon.h>
37#include <linux/hwmon-sysfs.h>
38#include <linux/hwmon-vid.h>
39#include <linux/err.h>
40#include <linux/mutex.h>
41#include <linux/acpi.h>
42#include <linux/io.h>
43
44static int force_addr;
45module_param(force_addr, int, 0);
46MODULE_PARM_DESC(force_addr, "Initialize the base address of the sensors");
47
48static struct platform_device *pdev;
49
50#define VT8231_EXTENT 0x80
51#define VT8231_BASE_REG 0x70
52#define VT8231_ENABLE_REG 0x74
53
54/*
55 * The VT8231 registers
56 *
57 * The reset value for the input channel configuration is used (Reg 0x4A=0x07)
58 * which sets the selected inputs marked with '*' below if multiple options are
59 * possible:
60 *
61 * Voltage Mode Temperature Mode
62 * Sensor Linux Id Linux Id VIA Id
63 * -------- -------- -------- ------
64 * CPU Diode N/A temp1 0
65 * UIC1 in0 temp2 * 1
66 * UIC2 in1 * temp3 2
67 * UIC3 in2 * temp4 3
68 * UIC4 in3 * temp5 4
69 * UIC5 in4 * temp6 5
70 * 3.3V in5 N/A
71 *
72 * Note that the BIOS may set the configuration register to a different value
73 * to match the motherboard configuration.
74 */
75
76/* fans numbered 0-1 */
77#define VT8231_REG_FAN_MIN(nr) (0x3b + (nr))
78#define VT8231_REG_FAN(nr) (0x29 + (nr))
79
80/* Voltage inputs numbered 0-5 */
81
82static const u8 regvolt[] = { 0x21, 0x22, 0x23, 0x24, 0x25, 0x26 };
83static const u8 regvoltmax[] = { 0x3d, 0x2b, 0x2d, 0x2f, 0x31, 0x33 };
84static const u8 regvoltmin[] = { 0x3e, 0x2c, 0x2e, 0x30, 0x32, 0x34 };
85
86/*
87 * Temperatures are numbered 1-6 according to the Linux kernel specification.
88 *
89 * In the VIA datasheet, however, the temperatures are numbered from zero.
90 * Since it is important that this driver can easily be compared to the VIA
91 * datasheet, we will use the VIA numbering within this driver and map the
92 * kernel sysfs device name to the VIA number in the sysfs callback.
93 */
94
95#define VT8231_REG_TEMP_LOW01 0x49
96#define VT8231_REG_TEMP_LOW25 0x4d
97
98static const u8 regtemp[] = { 0x1f, 0x21, 0x22, 0x23, 0x24, 0x25 };
99static const u8 regtempmax[] = { 0x39, 0x3d, 0x2b, 0x2d, 0x2f, 0x31 };
100static const u8 regtempmin[] = { 0x3a, 0x3e, 0x2c, 0x2e, 0x30, 0x32 };
101
102#define TEMP_FROM_REG(reg) (((253 * 4 - (reg)) * 550 + 105) / 210)
103#define TEMP_MAXMIN_FROM_REG(reg) (((253 - (reg)) * 2200 + 105) / 210)
104#define TEMP_MAXMIN_TO_REG(val) (253 - ((val) * 210 + 1100) / 2200)
105
106#define VT8231_REG_CONFIG 0x40
107#define VT8231_REG_ALARM1 0x41
108#define VT8231_REG_ALARM2 0x42
109#define VT8231_REG_FANDIV 0x47
110#define VT8231_REG_UCH_CONFIG 0x4a
111#define VT8231_REG_TEMP1_CONFIG 0x4b
112#define VT8231_REG_TEMP2_CONFIG 0x4c
113
114/*
115 * temps 0-5 as numbered in VIA datasheet - see later for mapping to Linux
116 * numbering
117 */
118#define ISTEMP(i, ch_config) ((i) == 0 ? 1 : \
119 ((ch_config) >> ((i)+1)) & 0x01)
120/* voltages 0-5 */
121#define ISVOLT(i, ch_config) ((i) == 5 ? 1 : \
122 !(((ch_config) >> ((i)+2)) & 0x01))
123
124#define DIV_FROM_REG(val) (1 << (val))
125
126/*
127 * NB The values returned here are NOT temperatures. The calibration curves
128 * for the thermistor curves are board-specific and must go in the
129 * sensors.conf file. Temperature sensors are actually ten bits, but the
130 * VIA datasheet only considers the 8 MSBs obtained from the regtemp[]
131 * register. The temperature value returned should have a magnitude of 3,
132 * so we use the VIA scaling as the "true" scaling and use the remaining 2
133 * LSBs as fractional precision.
134 *
135 * All the on-chip hardware temperature comparisons for the alarms are only
136 * 8-bits wide, and compare against the 8 MSBs of the temperature. The bits
137 * in the registers VT8231_REG_TEMP_LOW01 and VT8231_REG_TEMP_LOW25 are
138 * ignored.
139 */
140
141/*
142 ****** FAN RPM CONVERSIONS ********
143 * This chip saturates back at 0, not at 255 like many the other chips.
144 * So, 0 means 0 RPM
145 */
146static inline u8 FAN_TO_REG(long rpm, int div)
147{
148 if (rpm == 0)
149 return 0;
150 return SENSORS_LIMIT(1310720 / (rpm * div), 1, 255);
151}
152
153#define FAN_FROM_REG(val, div) ((val) == 0 ? 0 : 1310720 / ((val) * (div)))
154
155struct vt8231_data {
156 unsigned short addr;
157 const char *name;
158
159 struct mutex update_lock;
160 struct device *hwmon_dev;
161 char valid; /* !=0 if following fields are valid */
162 unsigned long last_updated; /* In jiffies */
163
164 u8 in[6]; /* Register value */
165 u8 in_max[6]; /* Register value */
166 u8 in_min[6]; /* Register value */
167 u16 temp[6]; /* Register value 10 bit, right aligned */
168 u8 temp_max[6]; /* Register value */
169 u8 temp_min[6]; /* Register value */
170 u8 fan[2]; /* Register value */
171 u8 fan_min[2]; /* Register value */
172 u8 fan_div[2]; /* Register encoding, shifted right */
173 u16 alarms; /* Register encoding */
174 u8 uch_config;
175};
176
177static struct pci_dev *s_bridge;
178static int vt8231_probe(struct platform_device *pdev);
179static int __devexit vt8231_remove(struct platform_device *pdev);
180static struct vt8231_data *vt8231_update_device(struct device *dev);
181static void vt8231_init_device(struct vt8231_data *data);
182
183static inline int vt8231_read_value(struct vt8231_data *data, u8 reg)
184{
185 return inb_p(data->addr + reg);
186}
187
188static inline void vt8231_write_value(struct vt8231_data *data, u8 reg,
189 u8 value)
190{
191 outb_p(value, data->addr + reg);
192}
193
194/* following are the sysfs callback functions */
195static ssize_t show_in(struct device *dev, struct device_attribute *attr,
196 char *buf)
197{
198 struct sensor_device_attribute *sensor_attr = to_sensor_dev_attr(attr);
199 int nr = sensor_attr->index;
200 struct vt8231_data *data = vt8231_update_device(dev);
201
202 return sprintf(buf, "%d\n", ((data->in[nr] - 3) * 10000) / 958);
203}
204
205static ssize_t show_in_min(struct device *dev, struct device_attribute *attr,
206 char *buf)
207{
208 struct sensor_device_attribute *sensor_attr = to_sensor_dev_attr(attr);
209 int nr = sensor_attr->index;
210 struct vt8231_data *data = vt8231_update_device(dev);
211
212 return sprintf(buf, "%d\n", ((data->in_min[nr] - 3) * 10000) / 958);
213}
214
215static ssize_t show_in_max(struct device *dev, struct device_attribute *attr,
216 char *buf)
217{
218 struct sensor_device_attribute *sensor_attr = to_sensor_dev_attr(attr);
219 int nr = sensor_attr->index;
220 struct vt8231_data *data = vt8231_update_device(dev);
221
222 return sprintf(buf, "%d\n", (((data->in_max[nr] - 3) * 10000) / 958));
223}
224
225static ssize_t set_in_min(struct device *dev, struct device_attribute *attr,
226 const char *buf, size_t count)
227{
228 struct sensor_device_attribute *sensor_attr = to_sensor_dev_attr(attr);
229 int nr = sensor_attr->index;
230 struct vt8231_data *data = dev_get_drvdata(dev);
231 unsigned long val;
232 int err;
233
234 err = kstrtoul(buf, 10, &val);
235 if (err)
236 return err;
237
238 mutex_lock(&data->update_lock);
239 data->in_min[nr] = SENSORS_LIMIT(((val * 958) / 10000) + 3, 0, 255);
240 vt8231_write_value(data, regvoltmin[nr], data->in_min[nr]);
241 mutex_unlock(&data->update_lock);
242 return count;
243}
244
245static ssize_t set_in_max(struct device *dev, struct device_attribute *attr,
246 const char *buf, size_t count)
247{
248 struct sensor_device_attribute *sensor_attr = to_sensor_dev_attr(attr);
249 int nr = sensor_attr->index;
250 struct vt8231_data *data = dev_get_drvdata(dev);
251 unsigned long val;
252 int err;
253
254 err = kstrtoul(buf, 10, &val);
255 if (err)
256 return err;
257
258 mutex_lock(&data->update_lock);
259 data->in_max[nr] = SENSORS_LIMIT(((val * 958) / 10000) + 3, 0, 255);
260 vt8231_write_value(data, regvoltmax[nr], data->in_max[nr]);
261 mutex_unlock(&data->update_lock);
262 return count;
263}
264
265/* Special case for input 5 as this has 3.3V scaling built into the chip */
266static ssize_t show_in5(struct device *dev, struct device_attribute *attr,
267 char *buf)
268{
269 struct vt8231_data *data = vt8231_update_device(dev);
270
271 return sprintf(buf, "%d\n",
272 (((data->in[5] - 3) * 10000 * 54) / (958 * 34)));
273}
274
275static ssize_t show_in5_min(struct device *dev, struct device_attribute *attr,
276 char *buf)
277{
278 struct vt8231_data *data = vt8231_update_device(dev);
279
280 return sprintf(buf, "%d\n",
281 (((data->in_min[5] - 3) * 10000 * 54) / (958 * 34)));
282}
283
284static ssize_t show_in5_max(struct device *dev, struct device_attribute *attr,
285 char *buf)
286{
287 struct vt8231_data *data = vt8231_update_device(dev);
288
289 return sprintf(buf, "%d\n",
290 (((data->in_max[5] - 3) * 10000 * 54) / (958 * 34)));
291}
292
293static ssize_t set_in5_min(struct device *dev, struct device_attribute *attr,
294 const char *buf, size_t count)
295{
296 struct vt8231_data *data = dev_get_drvdata(dev);
297 unsigned long val;
298 int err;
299
300 err = kstrtoul(buf, 10, &val);
301 if (err)
302 return err;
303
304 mutex_lock(&data->update_lock);
305 data->in_min[5] = SENSORS_LIMIT(((val * 958 * 34) / (10000 * 54)) + 3,
306 0, 255);
307 vt8231_write_value(data, regvoltmin[5], data->in_min[5]);
308 mutex_unlock(&data->update_lock);
309 return count;
310}
311
312static ssize_t set_in5_max(struct device *dev, struct device_attribute *attr,
313 const char *buf, size_t count)
314{
315 struct vt8231_data *data = dev_get_drvdata(dev);
316 unsigned long val;
317 int err;
318
319 err = kstrtoul(buf, 10, &val);
320 if (err)
321 return err;
322
323 mutex_lock(&data->update_lock);
324 data->in_max[5] = SENSORS_LIMIT(((val * 958 * 34) / (10000 * 54)) + 3,
325 0, 255);
326 vt8231_write_value(data, regvoltmax[5], data->in_max[5]);
327 mutex_unlock(&data->update_lock);
328 return count;
329}
330
331#define define_voltage_sysfs(offset) \
332static SENSOR_DEVICE_ATTR(in##offset##_input, S_IRUGO, \
333 show_in, NULL, offset); \
334static SENSOR_DEVICE_ATTR(in##offset##_min, S_IRUGO | S_IWUSR, \
335 show_in_min, set_in_min, offset); \
336static SENSOR_DEVICE_ATTR(in##offset##_max, S_IRUGO | S_IWUSR, \
337 show_in_max, set_in_max, offset)
338
339define_voltage_sysfs(0);
340define_voltage_sysfs(1);
341define_voltage_sysfs(2);
342define_voltage_sysfs(3);
343define_voltage_sysfs(4);
344
345static DEVICE_ATTR(in5_input, S_IRUGO, show_in5, NULL);
346static DEVICE_ATTR(in5_min, S_IRUGO | S_IWUSR, show_in5_min, set_in5_min);
347static DEVICE_ATTR(in5_max, S_IRUGO | S_IWUSR, show_in5_max, set_in5_max);
348
349/* Temperatures */
350static ssize_t show_temp0(struct device *dev, struct device_attribute *attr,
351 char *buf)
352{
353 struct vt8231_data *data = vt8231_update_device(dev);
354 return sprintf(buf, "%d\n", data->temp[0] * 250);
355}
356
357static ssize_t show_temp0_max(struct device *dev, struct device_attribute *attr,
358 char *buf)
359{
360 struct vt8231_data *data = vt8231_update_device(dev);
361 return sprintf(buf, "%d\n", data->temp_max[0] * 1000);
362}
363
364static ssize_t show_temp0_min(struct device *dev, struct device_attribute *attr,
365 char *buf)
366{
367 struct vt8231_data *data = vt8231_update_device(dev);
368 return sprintf(buf, "%d\n", data->temp_min[0] * 1000);
369}
370
371static ssize_t set_temp0_max(struct device *dev, struct device_attribute *attr,
372 const char *buf, size_t count)
373{
374 struct vt8231_data *data = dev_get_drvdata(dev);
375 long val;
376 int err;
377
378 err = kstrtol(buf, 10, &val);
379 if (err)
380 return err;
381
382 mutex_lock(&data->update_lock);
383 data->temp_max[0] = SENSORS_LIMIT((val + 500) / 1000, 0, 255);
384 vt8231_write_value(data, regtempmax[0], data->temp_max[0]);
385 mutex_unlock(&data->update_lock);
386 return count;
387}
388static ssize_t set_temp0_min(struct device *dev, struct device_attribute *attr,
389 const char *buf, size_t count)
390{
391 struct vt8231_data *data = dev_get_drvdata(dev);
392 long val;
393 int err;
394
395 err = kstrtol(buf, 10, &val);
396 if (err)
397 return err;
398
399 mutex_lock(&data->update_lock);
400 data->temp_min[0] = SENSORS_LIMIT((val + 500) / 1000, 0, 255);
401 vt8231_write_value(data, regtempmin[0], data->temp_min[0]);
402 mutex_unlock(&data->update_lock);
403 return count;
404}
405
406static ssize_t show_temp(struct device *dev, struct device_attribute *attr,
407 char *buf)
408{
409 struct sensor_device_attribute *sensor_attr = to_sensor_dev_attr(attr);
410 int nr = sensor_attr->index;
411 struct vt8231_data *data = vt8231_update_device(dev);
412 return sprintf(buf, "%d\n", TEMP_FROM_REG(data->temp[nr]));
413}
414
415static ssize_t show_temp_max(struct device *dev, struct device_attribute *attr,
416 char *buf)
417{
418 struct sensor_device_attribute *sensor_attr = to_sensor_dev_attr(attr);
419 int nr = sensor_attr->index;
420 struct vt8231_data *data = vt8231_update_device(dev);
421 return sprintf(buf, "%d\n", TEMP_MAXMIN_FROM_REG(data->temp_max[nr]));
422}
423
424static ssize_t show_temp_min(struct device *dev, struct device_attribute *attr,
425 char *buf)
426{
427 struct sensor_device_attribute *sensor_attr = to_sensor_dev_attr(attr);
428 int nr = sensor_attr->index;
429 struct vt8231_data *data = vt8231_update_device(dev);
430 return sprintf(buf, "%d\n", TEMP_MAXMIN_FROM_REG(data->temp_min[nr]));
431}
432
433static ssize_t set_temp_max(struct device *dev, struct device_attribute *attr,
434 const char *buf, size_t count)
435{
436 struct sensor_device_attribute *sensor_attr = to_sensor_dev_attr(attr);
437 int nr = sensor_attr->index;
438 struct vt8231_data *data = dev_get_drvdata(dev);
439 long val;
440 int err;
441
442 err = kstrtol(buf, 10, &val);
443 if (err)
444 return err;
445
446 mutex_lock(&data->update_lock);
447 data->temp_max[nr] = SENSORS_LIMIT(TEMP_MAXMIN_TO_REG(val), 0, 255);
448 vt8231_write_value(data, regtempmax[nr], data->temp_max[nr]);
449 mutex_unlock(&data->update_lock);
450 return count;
451}
452static ssize_t set_temp_min(struct device *dev, struct device_attribute *attr,
453 const char *buf, size_t count)
454{
455 struct sensor_device_attribute *sensor_attr = to_sensor_dev_attr(attr);
456 int nr = sensor_attr->index;
457 struct vt8231_data *data = dev_get_drvdata(dev);
458 long val;
459 int err;
460
461 err = kstrtol(buf, 10, &val);
462 if (err)
463 return err;
464
465 mutex_lock(&data->update_lock);
466 data->temp_min[nr] = SENSORS_LIMIT(TEMP_MAXMIN_TO_REG(val), 0, 255);
467 vt8231_write_value(data, regtempmin[nr], data->temp_min[nr]);
468 mutex_unlock(&data->update_lock);
469 return count;
470}
471
472/*
473 * Note that these map the Linux temperature sensor numbering (1-6) to the VIA
474 * temperature sensor numbering (0-5)
475 */
476#define define_temperature_sysfs(offset) \
477static SENSOR_DEVICE_ATTR(temp##offset##_input, S_IRUGO, \
478 show_temp, NULL, offset - 1); \
479static SENSOR_DEVICE_ATTR(temp##offset##_max, S_IRUGO | S_IWUSR, \
480 show_temp_max, set_temp_max, offset - 1); \
481static SENSOR_DEVICE_ATTR(temp##offset##_max_hyst, S_IRUGO | S_IWUSR, \
482 show_temp_min, set_temp_min, offset - 1)
483
484static DEVICE_ATTR(temp1_input, S_IRUGO, show_temp0, NULL);
485static DEVICE_ATTR(temp1_max, S_IRUGO | S_IWUSR, show_temp0_max, set_temp0_max);
486static DEVICE_ATTR(temp1_max_hyst, S_IRUGO | S_IWUSR, show_temp0_min,
487 set_temp0_min);
488
489define_temperature_sysfs(2);
490define_temperature_sysfs(3);
491define_temperature_sysfs(4);
492define_temperature_sysfs(5);
493define_temperature_sysfs(6);
494
495/* Fans */
496static ssize_t show_fan(struct device *dev, struct device_attribute *attr,
497 char *buf)
498{
499 struct sensor_device_attribute *sensor_attr = to_sensor_dev_attr(attr);
500 int nr = sensor_attr->index;
501 struct vt8231_data *data = vt8231_update_device(dev);
502 return sprintf(buf, "%d\n", FAN_FROM_REG(data->fan[nr],
503 DIV_FROM_REG(data->fan_div[nr])));
504}
505
506static ssize_t show_fan_min(struct device *dev, struct device_attribute *attr,
507 char *buf)
508{
509 struct sensor_device_attribute *sensor_attr = to_sensor_dev_attr(attr);
510 int nr = sensor_attr->index;
511 struct vt8231_data *data = vt8231_update_device(dev);
512 return sprintf(buf, "%d\n", FAN_FROM_REG(data->fan_min[nr],
513 DIV_FROM_REG(data->fan_div[nr])));
514}
515
516static ssize_t show_fan_div(struct device *dev, struct device_attribute *attr,
517 char *buf)
518{
519 struct sensor_device_attribute *sensor_attr = to_sensor_dev_attr(attr);
520 int nr = sensor_attr->index;
521 struct vt8231_data *data = vt8231_update_device(dev);
522 return sprintf(buf, "%d\n", DIV_FROM_REG(data->fan_div[nr]));
523}
524
525static ssize_t set_fan_min(struct device *dev, struct device_attribute *attr,
526 const char *buf, size_t count)
527{
528 struct sensor_device_attribute *sensor_attr = to_sensor_dev_attr(attr);
529 int nr = sensor_attr->index;
530 struct vt8231_data *data = dev_get_drvdata(dev);
531 unsigned long val;
532 int err;
533
534 err = kstrtoul(buf, 10, &val);
535 if (err)
536 return err;
537
538 mutex_lock(&data->update_lock);
539 data->fan_min[nr] = FAN_TO_REG(val, DIV_FROM_REG(data->fan_div[nr]));
540 vt8231_write_value(data, VT8231_REG_FAN_MIN(nr), data->fan_min[nr]);
541 mutex_unlock(&data->update_lock);
542 return count;
543}
544
545static ssize_t set_fan_div(struct device *dev, struct device_attribute *attr,
546 const char *buf, size_t count)
547{
548 struct vt8231_data *data = dev_get_drvdata(dev);
549 struct sensor_device_attribute *sensor_attr = to_sensor_dev_attr(attr);
550 unsigned long val;
551 int nr = sensor_attr->index;
552 int old = vt8231_read_value(data, VT8231_REG_FANDIV);
553 long min = FAN_FROM_REG(data->fan_min[nr],
554 DIV_FROM_REG(data->fan_div[nr]));
555 int err;
556
557 err = kstrtoul(buf, 10, &val);
558 if (err)
559 return err;
560
561 mutex_lock(&data->update_lock);
562 switch (val) {
563 case 1:
564 data->fan_div[nr] = 0;
565 break;
566 case 2:
567 data->fan_div[nr] = 1;
568 break;
569 case 4:
570 data->fan_div[nr] = 2;
571 break;
572 case 8:
573 data->fan_div[nr] = 3;
574 break;
575 default:
576 dev_err(dev, "fan_div value %ld not supported. "
577 "Choose one of 1, 2, 4 or 8!\n", val);
578 mutex_unlock(&data->update_lock);
579 return -EINVAL;
580 }
581
582 /* Correct the fan minimum speed */
583 data->fan_min[nr] = FAN_TO_REG(min, DIV_FROM_REG(data->fan_div[nr]));
584 vt8231_write_value(data, VT8231_REG_FAN_MIN(nr), data->fan_min[nr]);
585
586 old = (old & 0x0f) | (data->fan_div[1] << 6) | (data->fan_div[0] << 4);
587 vt8231_write_value(data, VT8231_REG_FANDIV, old);
588 mutex_unlock(&data->update_lock);
589 return count;
590}
591
592
593#define define_fan_sysfs(offset) \
594static SENSOR_DEVICE_ATTR(fan##offset##_input, S_IRUGO, \
595 show_fan, NULL, offset - 1); \
596static SENSOR_DEVICE_ATTR(fan##offset##_div, S_IRUGO | S_IWUSR, \
597 show_fan_div, set_fan_div, offset - 1); \
598static SENSOR_DEVICE_ATTR(fan##offset##_min, S_IRUGO | S_IWUSR, \
599 show_fan_min, set_fan_min, offset - 1)
600
601define_fan_sysfs(1);
602define_fan_sysfs(2);
603
604/* Alarms */
605static ssize_t show_alarms(struct device *dev, struct device_attribute *attr,
606 char *buf)
607{
608 struct vt8231_data *data = vt8231_update_device(dev);
609 return sprintf(buf, "%d\n", data->alarms);
610}
611static DEVICE_ATTR(alarms, S_IRUGO, show_alarms, NULL);
612
613static ssize_t show_alarm(struct device *dev, struct device_attribute *attr,
614 char *buf)
615{
616 int bitnr = to_sensor_dev_attr(attr)->index;
617 struct vt8231_data *data = vt8231_update_device(dev);
618 return sprintf(buf, "%u\n", (data->alarms >> bitnr) & 1);
619}
620static SENSOR_DEVICE_ATTR(temp1_alarm, S_IRUGO, show_alarm, NULL, 4);
621static SENSOR_DEVICE_ATTR(temp2_alarm, S_IRUGO, show_alarm, NULL, 11);
622static SENSOR_DEVICE_ATTR(temp3_alarm, S_IRUGO, show_alarm, NULL, 0);
623static SENSOR_DEVICE_ATTR(temp4_alarm, S_IRUGO, show_alarm, NULL, 1);
624static SENSOR_DEVICE_ATTR(temp5_alarm, S_IRUGO, show_alarm, NULL, 3);
625static SENSOR_DEVICE_ATTR(temp6_alarm, S_IRUGO, show_alarm, NULL, 8);
626static SENSOR_DEVICE_ATTR(in0_alarm, S_IRUGO, show_alarm, NULL, 11);
627static SENSOR_DEVICE_ATTR(in1_alarm, S_IRUGO, show_alarm, NULL, 0);
628static SENSOR_DEVICE_ATTR(in2_alarm, S_IRUGO, show_alarm, NULL, 1);
629static SENSOR_DEVICE_ATTR(in3_alarm, S_IRUGO, show_alarm, NULL, 3);
630static SENSOR_DEVICE_ATTR(in4_alarm, S_IRUGO, show_alarm, NULL, 8);
631static SENSOR_DEVICE_ATTR(in5_alarm, S_IRUGO, show_alarm, NULL, 2);
632static SENSOR_DEVICE_ATTR(fan1_alarm, S_IRUGO, show_alarm, NULL, 6);
633static SENSOR_DEVICE_ATTR(fan2_alarm, S_IRUGO, show_alarm, NULL, 7);
634
635static ssize_t show_name(struct device *dev, struct device_attribute
636 *devattr, char *buf)
637{
638 struct vt8231_data *data = dev_get_drvdata(dev);
639 return sprintf(buf, "%s\n", data->name);
640}
641static DEVICE_ATTR(name, S_IRUGO, show_name, NULL);
642
643static struct attribute *vt8231_attributes_temps[6][5] = {
644 {
645 &dev_attr_temp1_input.attr,
646 &dev_attr_temp1_max_hyst.attr,
647 &dev_attr_temp1_max.attr,
648 &sensor_dev_attr_temp1_alarm.dev_attr.attr,
649 NULL
650 }, {
651 &sensor_dev_attr_temp2_input.dev_attr.attr,
652 &sensor_dev_attr_temp2_max_hyst.dev_attr.attr,
653 &sensor_dev_attr_temp2_max.dev_attr.attr,
654 &sensor_dev_attr_temp2_alarm.dev_attr.attr,
655 NULL
656 }, {
657 &sensor_dev_attr_temp3_input.dev_attr.attr,
658 &sensor_dev_attr_temp3_max_hyst.dev_attr.attr,
659 &sensor_dev_attr_temp3_max.dev_attr.attr,
660 &sensor_dev_attr_temp3_alarm.dev_attr.attr,
661 NULL
662 }, {
663 &sensor_dev_attr_temp4_input.dev_attr.attr,
664 &sensor_dev_attr_temp4_max_hyst.dev_attr.attr,
665 &sensor_dev_attr_temp4_max.dev_attr.attr,
666 &sensor_dev_attr_temp4_alarm.dev_attr.attr,
667 NULL
668 }, {
669 &sensor_dev_attr_temp5_input.dev_attr.attr,
670 &sensor_dev_attr_temp5_max_hyst.dev_attr.attr,
671 &sensor_dev_attr_temp5_max.dev_attr.attr,
672 &sensor_dev_attr_temp5_alarm.dev_attr.attr,
673 NULL
674 }, {
675 &sensor_dev_attr_temp6_input.dev_attr.attr,
676 &sensor_dev_attr_temp6_max_hyst.dev_attr.attr,
677 &sensor_dev_attr_temp6_max.dev_attr.attr,
678 &sensor_dev_attr_temp6_alarm.dev_attr.attr,
679 NULL
680 }
681};
682
683static const struct attribute_group vt8231_group_temps[6] = {
684 { .attrs = vt8231_attributes_temps[0] },
685 { .attrs = vt8231_attributes_temps[1] },
686 { .attrs = vt8231_attributes_temps[2] },
687 { .attrs = vt8231_attributes_temps[3] },
688 { .attrs = vt8231_attributes_temps[4] },
689 { .attrs = vt8231_attributes_temps[5] },
690};
691
692static struct attribute *vt8231_attributes_volts[6][5] = {
693 {
694 &sensor_dev_attr_in0_input.dev_attr.attr,
695 &sensor_dev_attr_in0_min.dev_attr.attr,
696 &sensor_dev_attr_in0_max.dev_attr.attr,
697 &sensor_dev_attr_in0_alarm.dev_attr.attr,
698 NULL
699 }, {
700 &sensor_dev_attr_in1_input.dev_attr.attr,
701 &sensor_dev_attr_in1_min.dev_attr.attr,
702 &sensor_dev_attr_in1_max.dev_attr.attr,
703 &sensor_dev_attr_in1_alarm.dev_attr.attr,
704 NULL
705 }, {
706 &sensor_dev_attr_in2_input.dev_attr.attr,
707 &sensor_dev_attr_in2_min.dev_attr.attr,
708 &sensor_dev_attr_in2_max.dev_attr.attr,
709 &sensor_dev_attr_in2_alarm.dev_attr.attr,
710 NULL
711 }, {
712 &sensor_dev_attr_in3_input.dev_attr.attr,
713 &sensor_dev_attr_in3_min.dev_attr.attr,
714 &sensor_dev_attr_in3_max.dev_attr.attr,
715 &sensor_dev_attr_in3_alarm.dev_attr.attr,
716 NULL
717 }, {
718 &sensor_dev_attr_in4_input.dev_attr.attr,
719 &sensor_dev_attr_in4_min.dev_attr.attr,
720 &sensor_dev_attr_in4_max.dev_attr.attr,
721 &sensor_dev_attr_in4_alarm.dev_attr.attr,
722 NULL
723 }, {
724 &dev_attr_in5_input.attr,
725 &dev_attr_in5_min.attr,
726 &dev_attr_in5_max.attr,
727 &sensor_dev_attr_in5_alarm.dev_attr.attr,
728 NULL
729 }
730};
731
732static const struct attribute_group vt8231_group_volts[6] = {
733 { .attrs = vt8231_attributes_volts[0] },
734 { .attrs = vt8231_attributes_volts[1] },
735 { .attrs = vt8231_attributes_volts[2] },
736 { .attrs = vt8231_attributes_volts[3] },
737 { .attrs = vt8231_attributes_volts[4] },
738 { .attrs = vt8231_attributes_volts[5] },
739};
740
741static struct attribute *vt8231_attributes[] = {
742 &sensor_dev_attr_fan1_input.dev_attr.attr,
743 &sensor_dev_attr_fan2_input.dev_attr.attr,
744 &sensor_dev_attr_fan1_min.dev_attr.attr,
745 &sensor_dev_attr_fan2_min.dev_attr.attr,
746 &sensor_dev_attr_fan1_div.dev_attr.attr,
747 &sensor_dev_attr_fan2_div.dev_attr.attr,
748 &sensor_dev_attr_fan1_alarm.dev_attr.attr,
749 &sensor_dev_attr_fan2_alarm.dev_attr.attr,
750 &dev_attr_alarms.attr,
751 &dev_attr_name.attr,
752 NULL
753};
754
755static const struct attribute_group vt8231_group = {
756 .attrs = vt8231_attributes,
757};
758
759static struct platform_driver vt8231_driver = {
760 .driver = {
761 .owner = THIS_MODULE,
762 .name = "vt8231",
763 },
764 .probe = vt8231_probe,
765 .remove = __devexit_p(vt8231_remove),
766};
767
768static DEFINE_PCI_DEVICE_TABLE(vt8231_pci_ids) = {
769 { PCI_DEVICE(PCI_VENDOR_ID_VIA, PCI_DEVICE_ID_VIA_8231_4) },
770 { 0, }
771};
772
773MODULE_DEVICE_TABLE(pci, vt8231_pci_ids);
774
775static int __devinit vt8231_pci_probe(struct pci_dev *dev,
776 const struct pci_device_id *id);
777
778static struct pci_driver vt8231_pci_driver = {
779 .name = "vt8231",
780 .id_table = vt8231_pci_ids,
781 .probe = vt8231_pci_probe,
782};
783
784static int vt8231_probe(struct platform_device *pdev)
785{
786 struct resource *res;
787 struct vt8231_data *data;
788 int err = 0, i;
789
790 /* Reserve the ISA region */
791 res = platform_get_resource(pdev, IORESOURCE_IO, 0);
792 if (!request_region(res->start, VT8231_EXTENT,
793 vt8231_driver.driver.name)) {
794 dev_err(&pdev->dev, "Region 0x%lx-0x%lx already in use!\n",
795 (unsigned long)res->start, (unsigned long)res->end);
796 return -ENODEV;
797 }
798
799 data = kzalloc(sizeof(struct vt8231_data), GFP_KERNEL);
800 if (!data) {
801 err = -ENOMEM;
802 goto exit_release;
803 }
804
805 platform_set_drvdata(pdev, data);
806 data->addr = res->start;
807 data->name = "vt8231";
808
809 mutex_init(&data->update_lock);
810 vt8231_init_device(data);
811
812 /* Register sysfs hooks */
813 err = sysfs_create_group(&pdev->dev.kobj, &vt8231_group);
814 if (err)
815 goto exit_free;
816
817 /* Must update device information to find out the config field */
818 data->uch_config = vt8231_read_value(data, VT8231_REG_UCH_CONFIG);
819
820 for (i = 0; i < ARRAY_SIZE(vt8231_group_temps); i++) {
821 if (ISTEMP(i, data->uch_config)) {
822 err = sysfs_create_group(&pdev->dev.kobj,
823 &vt8231_group_temps[i]);
824 if (err)
825 goto exit_remove_files;
826 }
827 }
828
829 for (i = 0; i < ARRAY_SIZE(vt8231_group_volts); i++) {
830 if (ISVOLT(i, data->uch_config)) {
831 err = sysfs_create_group(&pdev->dev.kobj,
832 &vt8231_group_volts[i]);
833 if (err)
834 goto exit_remove_files;
835 }
836 }
837
838 data->hwmon_dev = hwmon_device_register(&pdev->dev);
839 if (IS_ERR(data->hwmon_dev)) {
840 err = PTR_ERR(data->hwmon_dev);
841 goto exit_remove_files;
842 }
843 return 0;
844
845exit_remove_files:
846 for (i = 0; i < ARRAY_SIZE(vt8231_group_volts); i++)
847 sysfs_remove_group(&pdev->dev.kobj, &vt8231_group_volts[i]);
848
849 for (i = 0; i < ARRAY_SIZE(vt8231_group_temps); i++)
850 sysfs_remove_group(&pdev->dev.kobj, &vt8231_group_temps[i]);
851
852 sysfs_remove_group(&pdev->dev.kobj, &vt8231_group);
853
854exit_free:
855 platform_set_drvdata(pdev, NULL);
856 kfree(data);
857
858exit_release:
859 release_region(res->start, VT8231_EXTENT);
860 return err;
861}
862
863static int __devexit vt8231_remove(struct platform_device *pdev)
864{
865 struct vt8231_data *data = platform_get_drvdata(pdev);
866 int i;
867
868 hwmon_device_unregister(data->hwmon_dev);
869
870 for (i = 0; i < ARRAY_SIZE(vt8231_group_volts); i++)
871 sysfs_remove_group(&pdev->dev.kobj, &vt8231_group_volts[i]);
872
873 for (i = 0; i < ARRAY_SIZE(vt8231_group_temps); i++)
874 sysfs_remove_group(&pdev->dev.kobj, &vt8231_group_temps[i]);
875
876 sysfs_remove_group(&pdev->dev.kobj, &vt8231_group);
877
878 release_region(data->addr, VT8231_EXTENT);
879 platform_set_drvdata(pdev, NULL);
880 kfree(data);
881 return 0;
882}
883
884static void vt8231_init_device(struct vt8231_data *data)
885{
886 vt8231_write_value(data, VT8231_REG_TEMP1_CONFIG, 0);
887 vt8231_write_value(data, VT8231_REG_TEMP2_CONFIG, 0);
888}
889
890static struct vt8231_data *vt8231_update_device(struct device *dev)
891{
892 struct vt8231_data *data = dev_get_drvdata(dev);
893 int i;
894 u16 low;
895
896 mutex_lock(&data->update_lock);
897
898 if (time_after(jiffies, data->last_updated + HZ + HZ / 2)
899 || !data->valid) {
900 for (i = 0; i < 6; i++) {
901 if (ISVOLT(i, data->uch_config)) {
902 data->in[i] = vt8231_read_value(data,
903 regvolt[i]);
904 data->in_min[i] = vt8231_read_value(data,
905 regvoltmin[i]);
906 data->in_max[i] = vt8231_read_value(data,
907 regvoltmax[i]);
908 }
909 }
910 for (i = 0; i < 2; i++) {
911 data->fan[i] = vt8231_read_value(data,
912 VT8231_REG_FAN(i));
913 data->fan_min[i] = vt8231_read_value(data,
914 VT8231_REG_FAN_MIN(i));
915 }
916
917 low = vt8231_read_value(data, VT8231_REG_TEMP_LOW01);
918 low = (low >> 6) | ((low & 0x30) >> 2)
919 | (vt8231_read_value(data, VT8231_REG_TEMP_LOW25) << 4);
920 for (i = 0; i < 6; i++) {
921 if (ISTEMP(i, data->uch_config)) {
922 data->temp[i] = (vt8231_read_value(data,
923 regtemp[i]) << 2)
924 | ((low >> (2 * i)) & 0x03);
925 data->temp_max[i] = vt8231_read_value(data,
926 regtempmax[i]);
927 data->temp_min[i] = vt8231_read_value(data,
928 regtempmin[i]);
929 }
930 }
931
932 i = vt8231_read_value(data, VT8231_REG_FANDIV);
933 data->fan_div[0] = (i >> 4) & 0x03;
934 data->fan_div[1] = i >> 6;
935 data->alarms = vt8231_read_value(data, VT8231_REG_ALARM1) |
936 (vt8231_read_value(data, VT8231_REG_ALARM2) << 8);
937
938 /* Set alarm flags correctly */
939 if (!data->fan[0] && data->fan_min[0])
940 data->alarms |= 0x40;
941 else if (data->fan[0] && !data->fan_min[0])
942 data->alarms &= ~0x40;
943
944 if (!data->fan[1] && data->fan_min[1])
945 data->alarms |= 0x80;
946 else if (data->fan[1] && !data->fan_min[1])
947 data->alarms &= ~0x80;
948
949 data->last_updated = jiffies;
950 data->valid = 1;
951 }
952
953 mutex_unlock(&data->update_lock);
954
955 return data;
956}
957
958static int __devinit vt8231_device_add(unsigned short address)
959{
960 struct resource res = {
961 .start = address,
962 .end = address + VT8231_EXTENT - 1,
963 .name = "vt8231",
964 .flags = IORESOURCE_IO,
965 };
966 int err;
967
968 err = acpi_check_resource_conflict(&res);
969 if (err)
970 goto exit;
971
972 pdev = platform_device_alloc("vt8231", address);
973 if (!pdev) {
974 err = -ENOMEM;
975 pr_err("Device allocation failed\n");
976 goto exit;
977 }
978
979 err = platform_device_add_resources(pdev, &res, 1);
980 if (err) {
981 pr_err("Device resource addition failed (%d)\n", err);
982 goto exit_device_put;
983 }
984
985 err = platform_device_add(pdev);
986 if (err) {
987 pr_err("Device addition failed (%d)\n", err);
988 goto exit_device_put;
989 }
990
991 return 0;
992
993exit_device_put:
994 platform_device_put(pdev);
995exit:
996 return err;
997}
998
999static int __devinit vt8231_pci_probe(struct pci_dev *dev,
1000 const struct pci_device_id *id)
1001{
1002 u16 address, val;
1003 if (force_addr) {
1004 address = force_addr & 0xff00;
1005 dev_warn(&dev->dev, "Forcing ISA address 0x%x\n",
1006 address);
1007
1008 if (PCIBIOS_SUCCESSFUL !=
1009 pci_write_config_word(dev, VT8231_BASE_REG, address | 1))
1010 return -ENODEV;
1011 }
1012
1013 if (PCIBIOS_SUCCESSFUL != pci_read_config_word(dev, VT8231_BASE_REG,
1014 &val))
1015 return -ENODEV;
1016
1017 address = val & ~(VT8231_EXTENT - 1);
1018 if (address == 0) {
1019 dev_err(&dev->dev, "base address not set - upgrade BIOS or use force_addr=0xaddr\n");
1020 return -ENODEV;
1021 }
1022
1023 if (PCIBIOS_SUCCESSFUL != pci_read_config_word(dev, VT8231_ENABLE_REG,
1024 &val))
1025 return -ENODEV;
1026
1027 if (!(val & 0x0001)) {
1028 dev_warn(&dev->dev, "enabling sensors\n");
1029 if (PCIBIOS_SUCCESSFUL !=
1030 pci_write_config_word(dev, VT8231_ENABLE_REG,
1031 val | 0x0001))
1032 return -ENODEV;
1033 }
1034
1035 if (platform_driver_register(&vt8231_driver))
1036 goto exit;
1037
1038 /* Sets global pdev as a side effect */
1039 if (vt8231_device_add(address))
1040 goto exit_unregister;
1041
1042 /*
1043 * Always return failure here. This is to allow other drivers to bind
1044 * to this pci device. We don't really want to have control over the
1045 * pci device, we only wanted to read as few register values from it.
1046 */
1047
1048 /*
1049 * We do, however, mark ourselves as using the PCI device to stop it
1050 * getting unloaded.
1051 */
1052 s_bridge = pci_dev_get(dev);
1053 return -ENODEV;
1054
1055exit_unregister:
1056 platform_driver_unregister(&vt8231_driver);
1057exit:
1058 return -ENODEV;
1059}
1060
1061static int __init sm_vt8231_init(void)
1062{
1063 return pci_register_driver(&vt8231_pci_driver);
1064}
1065
1066static void __exit sm_vt8231_exit(void)
1067{
1068 pci_unregister_driver(&vt8231_pci_driver);
1069 if (s_bridge != NULL) {
1070 platform_device_unregister(pdev);
1071 platform_driver_unregister(&vt8231_driver);
1072 pci_dev_put(s_bridge);
1073 s_bridge = NULL;
1074 }
1075}
1076
1077MODULE_AUTHOR("Roger Lucas <vt8231@hiddenengine.co.uk>");
1078MODULE_DESCRIPTION("VT8231 sensors");
1079MODULE_LICENSE("GPL");
1080
1081module_init(sm_vt8231_init);
1082module_exit(sm_vt8231_exit);