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ASoC: arizona: Correct handling of FLL theta in synchroniser mode
[linux/fpc-iii.git] / drivers / hwmon / vt8231.c
blobcb69a8c2ed5b84ba77d0053355ab2a649837e5f7
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
44 static int force_addr;
45 module_param(force_addr, int, 0);
46 MODULE_PARM_DESC(force_addr, "Initialize the base address of the sensors");
47
48 static 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
82 static const u8 regvolt[] = { 0x21, 0x22, 0x23, 0x24, 0x25, 0x26 };
83 static const u8 regvoltmax[] = { 0x3d, 0x2b, 0x2d, 0x2f, 0x31, 0x33 };
84 static const u8 regvoltmin[] = { 0x3e, 0x2c, 0x2e, 0x30, 0x32, 0x34 };
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
98 static const u8 regtemp[] = { 0x1f, 0x21, 0x22, 0x23, 0x24, 0x25 };
99 static const u8 regtempmax[] = { 0x39, 0x3d, 0x2b, 0x2d, 0x2f, 0x31 };
100 static const u8 regtempmin[] = { 0x3a, 0x3e, 0x2c, 0x2e, 0x30, 0x32 };
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 */
146 static 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
155 struct 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
177 static struct pci_dev *s_bridge;
178 static int vt8231_probe(struct platform_device *pdev);
179 static int vt8231_remove(struct platform_device *pdev);
180 static struct vt8231_data *vt8231_update_device(struct device *dev);
181 static void vt8231_init_device(struct vt8231_data *data);
182
183 static inline int vt8231_read_value(struct vt8231_data *data, u8 reg)
184 {
185 return inb_p(data->addr + reg);
186 }
187
188 static 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 */
195 static 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
205 static 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
215 static 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
225 static 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
245 static 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 */
266 static 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
275 static 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
284 static 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
293 static 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
312 static 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) \
332 static SENSOR_DEVICE_ATTR(in##offset##_input, S_IRUGO, \
333 show_in, NULL, offset); \
334 static SENSOR_DEVICE_ATTR(in##offset##_min, S_IRUGO | S_IWUSR, \
335 show_in_min, set_in_min, offset); \
336 static SENSOR_DEVICE_ATTR(in##offset##_max, S_IRUGO | S_IWUSR, \
337 show_in_max, set_in_max, offset)
338
339 define_voltage_sysfs(0);
340 define_voltage_sysfs(1);
341 define_voltage_sysfs(2);
342 define_voltage_sysfs(3);
343 define_voltage_sysfs(4);
344
345 static DEVICE_ATTR(in5_input, S_IRUGO, show_in5, NULL);
346 static DEVICE_ATTR(in5_min, S_IRUGO | S_IWUSR, show_in5_min, set_in5_min);
347 static DEVICE_ATTR(in5_max, S_IRUGO | S_IWUSR, show_in5_max, set_in5_max);
348
349 /* Temperatures */
350 static 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
357 static 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
364 static 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
371 static 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 }
388 static 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
406 static 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
415 static 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
424 static 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
433 static 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 }
452 static 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) \
477 static SENSOR_DEVICE_ATTR(temp##offset##_input, S_IRUGO, \
478 show_temp, NULL, offset - 1); \
479 static SENSOR_DEVICE_ATTR(temp##offset##_max, S_IRUGO | S_IWUSR, \
480 show_temp_max, set_temp_max, offset - 1); \
481 static SENSOR_DEVICE_ATTR(temp##offset##_max_hyst, S_IRUGO | S_IWUSR, \
482 show_temp_min, set_temp_min, offset - 1)
483
484 static DEVICE_ATTR(temp1_input, S_IRUGO, show_temp0, NULL);
485 static DEVICE_ATTR(temp1_max, S_IRUGO | S_IWUSR, show_temp0_max, set_temp0_max);
486 static DEVICE_ATTR(temp1_max_hyst, S_IRUGO | S_IWUSR, show_temp0_min,
487 set_temp0_min);
488
489 define_temperature_sysfs(2);
490 define_temperature_sysfs(3);
491 define_temperature_sysfs(4);
492 define_temperature_sysfs(5);
493 define_temperature_sysfs(6);
494
495 /* Fans */
496 static 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
506 static 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
516 static 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
525 static 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
545 static 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) \
595 static SENSOR_DEVICE_ATTR(fan##offset##_input, S_IRUGO, \
596 show_fan, NULL, offset - 1); \
597 static SENSOR_DEVICE_ATTR(fan##offset##_div, S_IRUGO | S_IWUSR, \
598 show_fan_div, set_fan_div, offset - 1); \
599 static SENSOR_DEVICE_ATTR(fan##offset##_min, S_IRUGO | S_IWUSR, \
600 show_fan_min, set_fan_min, offset - 1)
601
602 define_fan_sysfs(1);
603 define_fan_sysfs(2);
604
605 /* Alarms */
606 static 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 }
612 static DEVICE_ATTR(alarms, S_IRUGO, show_alarms, NULL);
613
614 static 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 }
621 static SENSOR_DEVICE_ATTR(temp1_alarm, S_IRUGO, show_alarm, NULL, 4);
622 static SENSOR_DEVICE_ATTR(temp2_alarm, S_IRUGO, show_alarm, NULL, 11);
623 static SENSOR_DEVICE_ATTR(temp3_alarm, S_IRUGO, show_alarm, NULL, 0);
624 static SENSOR_DEVICE_ATTR(temp4_alarm, S_IRUGO, show_alarm, NULL, 1);
625 static SENSOR_DEVICE_ATTR(temp5_alarm, S_IRUGO, show_alarm, NULL, 3);
626 static SENSOR_DEVICE_ATTR(temp6_alarm, S_IRUGO, show_alarm, NULL, 8);
627 static SENSOR_DEVICE_ATTR(in0_alarm, S_IRUGO, show_alarm, NULL, 11);
628 static SENSOR_DEVICE_ATTR(in1_alarm, S_IRUGO, show_alarm, NULL, 0);
629 static SENSOR_DEVICE_ATTR(in2_alarm, S_IRUGO, show_alarm, NULL, 1);
630 static SENSOR_DEVICE_ATTR(in3_alarm, S_IRUGO, show_alarm, NULL, 3);
631 static SENSOR_DEVICE_ATTR(in4_alarm, S_IRUGO, show_alarm, NULL, 8);
632 static SENSOR_DEVICE_ATTR(in5_alarm, S_IRUGO, show_alarm, NULL, 2);
633 static SENSOR_DEVICE_ATTR(fan1_alarm, S_IRUGO, show_alarm, NULL, 6);
634 static SENSOR_DEVICE_ATTR(fan2_alarm, S_IRUGO, show_alarm, NULL, 7);
635
636 static 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 }
642 static DEVICE_ATTR(name, S_IRUGO, show_name, NULL);
643
644 static 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
684 static 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
693 static 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
733 static 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
742 static 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
756 static const struct attribute_group vt8231_group = {
757 .attrs = vt8231_attributes,
758 };
759
760 static struct platform_driver vt8231_driver = {
761 .driver = {
762 .name = "vt8231",
763 },
764 .probe = vt8231_probe,
765 .remove = vt8231_remove,
766 };
767
768 static 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
773 MODULE_DEVICE_TABLE(pci, vt8231_pci_ids);
774
775 static int vt8231_pci_probe(struct pci_dev *dev,
776 const struct pci_device_id *id);
777
778 static struct pci_driver vt8231_pci_driver = {
779 .name = "vt8231",
780 .id_table = vt8231_pci_ids,
781 .probe = vt8231_pci_probe,
782 };
783
784 static 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
843 exit_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
854 static 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
872 static 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
878 static 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
946 static 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
981 exit_device_put:
982 platform_device_put(pdev);
983 exit:
984 return err;
985 }
986
987 static 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
1043 exit_unregister:
1044 platform_driver_unregister(&vt8231_driver);
1045 exit:
1046 return -ENODEV;
1047 }
1048
1049 static int __init sm_vt8231_init(void)
1050 {
1051 return pci_register_driver(&vt8231_pci_driver);
1052 }
1053
1054 static 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
1065 MODULE_AUTHOR("Roger Lucas <vt8231@hiddenengine.co.uk>");
1066 MODULE_DESCRIPTION("VT8231 sensors");
1067 MODULE_LICENSE("GPL");
1068
1069 module_init(sm_vt8231_init);
1070 module_exit(sm_vt8231_exit);
Linux with added FPC-III support