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treewide: remove redundant IS_ERR() before error code check
[linux/fpc-iii.git] / drivers / hwmon / vt8231.c
blob2335d440f72d7b2e0d41c9633c1ff2cfc72534b4
1 // SPDX-License-Identifier: GPL-2.0-or-later
2 /*
3 * vt8231.c - Part of lm_sensors, Linux kernel modules
4 * for hardware monitoring
5 *
6 * Copyright (c) 2005 Roger Lucas <vt8231@hiddenengine.co.uk>
7 * Copyright (c) 2002 Mark D. Studebaker <mdsxyz123@yahoo.com>
8 * Aaron M. Marsh <amarsh@sdf.lonestar.org>
9 */
10
11 /*
12 * Supports VIA VT8231 South Bridge embedded sensors
13 */
14
15 #define pr_fmt(fmt) KBUILD_MODNAME ": " fmt
16
17 #include <linux/module.h>
18 #include <linux/init.h>
19 #include <linux/slab.h>
20 #include <linux/pci.h>
21 #include <linux/jiffies.h>
22 #include <linux/platform_device.h>
23 #include <linux/hwmon.h>
24 #include <linux/hwmon-sysfs.h>
25 #include <linux/hwmon-vid.h>
26 #include <linux/err.h>
27 #include <linux/mutex.h>
28 #include <linux/acpi.h>
29 #include <linux/io.h>
30
31 static int force_addr;
32 module_param(force_addr, int, 0);
33 MODULE_PARM_DESC(force_addr, "Initialize the base address of the sensors");
34
35 static struct platform_device *pdev;
36
37 #define VT8231_EXTENT 0x80
38 #define VT8231_BASE_REG 0x70
39 #define VT8231_ENABLE_REG 0x74
40
41 /*
42 * The VT8231 registers
43 *
44 * The reset value for the input channel configuration is used (Reg 0x4A=0x07)
45 * which sets the selected inputs marked with '*' below if multiple options are
46 * possible:
47 *
48 * Voltage Mode Temperature Mode
49 * Sensor Linux Id Linux Id VIA Id
50 * -------- -------- -------- ------
51 * CPU Diode N/A temp1 0
52 * UIC1 in0 temp2 * 1
53 * UIC2 in1 * temp3 2
54 * UIC3 in2 * temp4 3
55 * UIC4 in3 * temp5 4
56 * UIC5 in4 * temp6 5
57 * 3.3V in5 N/A
58 *
59 * Note that the BIOS may set the configuration register to a different value
60 * to match the motherboard configuration.
61 */
62
63 /* fans numbered 0-1 */
64 #define VT8231_REG_FAN_MIN(nr) (0x3b + (nr))
65 #define VT8231_REG_FAN(nr) (0x29 + (nr))
66
67 /* Voltage inputs numbered 0-5 */
68
69 static const u8 regvolt[] = { 0x21, 0x22, 0x23, 0x24, 0x25, 0x26 };
70 static const u8 regvoltmax[] = { 0x3d, 0x2b, 0x2d, 0x2f, 0x31, 0x33 };
71 static const u8 regvoltmin[] = { 0x3e, 0x2c, 0x2e, 0x30, 0x32, 0x34 };
72
73 /*
74 * Temperatures are numbered 1-6 according to the Linux kernel specification.
75 *
76 * In the VIA datasheet, however, the temperatures are numbered from zero.
77 * Since it is important that this driver can easily be compared to the VIA
78 * datasheet, we will use the VIA numbering within this driver and map the
79 * kernel sysfs device name to the VIA number in the sysfs callback.
80 */
81
82 #define VT8231_REG_TEMP_LOW01 0x49
83 #define VT8231_REG_TEMP_LOW25 0x4d
84
85 static const u8 regtemp[] = { 0x1f, 0x21, 0x22, 0x23, 0x24, 0x25 };
86 static const u8 regtempmax[] = { 0x39, 0x3d, 0x2b, 0x2d, 0x2f, 0x31 };
87 static const u8 regtempmin[] = { 0x3a, 0x3e, 0x2c, 0x2e, 0x30, 0x32 };
88
89 #define TEMP_FROM_REG(reg) (((253 * 4 - (reg)) * 550 + 105) / 210)
90 #define TEMP_MAXMIN_FROM_REG(reg) (((253 - (reg)) * 2200 + 105) / 210)
91 #define TEMP_MAXMIN_TO_REG(val) (253 - ((val) * 210 + 1100) / 2200)
92
93 #define VT8231_REG_CONFIG 0x40
94 #define VT8231_REG_ALARM1 0x41
95 #define VT8231_REG_ALARM2 0x42
96 #define VT8231_REG_FANDIV 0x47
97 #define VT8231_REG_UCH_CONFIG 0x4a
98 #define VT8231_REG_TEMP1_CONFIG 0x4b
99 #define VT8231_REG_TEMP2_CONFIG 0x4c
100
101 /*
102 * temps 0-5 as numbered in VIA datasheet - see later for mapping to Linux
103 * numbering
104 */
105 #define ISTEMP(i, ch_config) ((i) == 0 ? 1 : \
106 ((ch_config) >> ((i)+1)) & 0x01)
107 /* voltages 0-5 */
108 #define ISVOLT(i, ch_config) ((i) == 5 ? 1 : \
109 !(((ch_config) >> ((i)+2)) & 0x01))
110
111 #define DIV_FROM_REG(val) (1 << (val))
112
113 /*
114 * NB The values returned here are NOT temperatures. The calibration curves
115 * for the thermistor curves are board-specific and must go in the
116 * sensors.conf file. Temperature sensors are actually ten bits, but the
117 * VIA datasheet only considers the 8 MSBs obtained from the regtemp[]
118 * register. The temperature value returned should have a magnitude of 3,
119 * so we use the VIA scaling as the "true" scaling and use the remaining 2
120 * LSBs as fractional precision.
121 *
122 * All the on-chip hardware temperature comparisons for the alarms are only
123 * 8-bits wide, and compare against the 8 MSBs of the temperature. The bits
124 * in the registers VT8231_REG_TEMP_LOW01 and VT8231_REG_TEMP_LOW25 are
125 * ignored.
126 */
127
128 /*
129 ****** FAN RPM CONVERSIONS ********
130 * This chip saturates back at 0, not at 255 like many the other chips.
131 * So, 0 means 0 RPM
132 */
133 static inline u8 FAN_TO_REG(long rpm, int div)
134 {
135 if (rpm <= 0 || rpm > 1310720)
136 return 0;
137 return clamp_val(1310720 / (rpm * div), 1, 255);
138 }
139
140 #define FAN_FROM_REG(val, div) ((val) == 0 ? 0 : 1310720 / ((val) * (div)))
141
142 struct vt8231_data {
143 unsigned short addr;
144 const char *name;
145
146 struct mutex update_lock;
147 struct device *hwmon_dev;
148 char valid; /* !=0 if following fields are valid */
149 unsigned long last_updated; /* In jiffies */
150
151 u8 in[6]; /* Register value */
152 u8 in_max[6]; /* Register value */
153 u8 in_min[6]; /* Register value */
154 u16 temp[6]; /* Register value 10 bit, right aligned */
155 u8 temp_max[6]; /* Register value */
156 u8 temp_min[6]; /* Register value */
157 u8 fan[2]; /* Register value */
158 u8 fan_min[2]; /* Register value */
159 u8 fan_div[2]; /* Register encoding, shifted right */
160 u16 alarms; /* Register encoding */
161 u8 uch_config;
162 };
163
164 static struct pci_dev *s_bridge;
165 static int vt8231_probe(struct platform_device *pdev);
166 static int vt8231_remove(struct platform_device *pdev);
167 static struct vt8231_data *vt8231_update_device(struct device *dev);
168 static void vt8231_init_device(struct vt8231_data *data);
169
170 static inline int vt8231_read_value(struct vt8231_data *data, u8 reg)
171 {
172 return inb_p(data->addr + reg);
173 }
174
175 static inline void vt8231_write_value(struct vt8231_data *data, u8 reg,
176 u8 value)
177 {
178 outb_p(value, data->addr + reg);
179 }
180
181 /* following are the sysfs callback functions */
182 static ssize_t in_show(struct device *dev, struct device_attribute *attr,
183 char *buf)
184 {
185 struct sensor_device_attribute *sensor_attr = to_sensor_dev_attr(attr);
186 int nr = sensor_attr->index;
187 struct vt8231_data *data = vt8231_update_device(dev);
188
189 return sprintf(buf, "%d\n", ((data->in[nr] - 3) * 10000) / 958);
190 }
191
192 static ssize_t in_min_show(struct device *dev, struct device_attribute *attr,
193 char *buf)
194 {
195 struct sensor_device_attribute *sensor_attr = to_sensor_dev_attr(attr);
196 int nr = sensor_attr->index;
197 struct vt8231_data *data = vt8231_update_device(dev);
198
199 return sprintf(buf, "%d\n", ((data->in_min[nr] - 3) * 10000) / 958);
200 }
201
202 static ssize_t in_max_show(struct device *dev, struct device_attribute *attr,
203 char *buf)
204 {
205 struct sensor_device_attribute *sensor_attr = to_sensor_dev_attr(attr);
206 int nr = sensor_attr->index;
207 struct vt8231_data *data = vt8231_update_device(dev);
208
209 return sprintf(buf, "%d\n", (((data->in_max[nr] - 3) * 10000) / 958));
210 }
211
212 static ssize_t in_min_store(struct device *dev, struct device_attribute *attr,
213 const char *buf, size_t count)
214 {
215 struct sensor_device_attribute *sensor_attr = to_sensor_dev_attr(attr);
216 int nr = sensor_attr->index;
217 struct vt8231_data *data = dev_get_drvdata(dev);
218 unsigned long val;
219 int err;
220
221 err = kstrtoul(buf, 10, &val);
222 if (err)
223 return err;
224
225 mutex_lock(&data->update_lock);
226 data->in_min[nr] = clamp_val(((val * 958) / 10000) + 3, 0, 255);
227 vt8231_write_value(data, regvoltmin[nr], data->in_min[nr]);
228 mutex_unlock(&data->update_lock);
229 return count;
230 }
231
232 static ssize_t in_max_store(struct device *dev, struct device_attribute *attr,
233 const char *buf, size_t count)
234 {
235 struct sensor_device_attribute *sensor_attr = to_sensor_dev_attr(attr);
236 int nr = sensor_attr->index;
237 struct vt8231_data *data = dev_get_drvdata(dev);
238 unsigned long val;
239 int err;
240
241 err = kstrtoul(buf, 10, &val);
242 if (err)
243 return err;
244
245 mutex_lock(&data->update_lock);
246 data->in_max[nr] = clamp_val(((val * 958) / 10000) + 3, 0, 255);
247 vt8231_write_value(data, regvoltmax[nr], data->in_max[nr]);
248 mutex_unlock(&data->update_lock);
249 return count;
250 }
251
252 /* Special case for input 5 as this has 3.3V scaling built into the chip */
253 static ssize_t in5_input_show(struct device *dev,
254 struct device_attribute *attr, char *buf)
255 {
256 struct vt8231_data *data = vt8231_update_device(dev);
257
258 return sprintf(buf, "%d\n",
259 (((data->in[5] - 3) * 10000 * 54) / (958 * 34)));
260 }
261
262 static ssize_t in5_min_show(struct device *dev, struct device_attribute *attr,
263 char *buf)
264 {
265 struct vt8231_data *data = vt8231_update_device(dev);
266
267 return sprintf(buf, "%d\n",
268 (((data->in_min[5] - 3) * 10000 * 54) / (958 * 34)));
269 }
270
271 static ssize_t in5_max_show(struct device *dev, struct device_attribute *attr,
272 char *buf)
273 {
274 struct vt8231_data *data = vt8231_update_device(dev);
275
276 return sprintf(buf, "%d\n",
277 (((data->in_max[5] - 3) * 10000 * 54) / (958 * 34)));
278 }
279
280 static ssize_t in5_min_store(struct device *dev,
281 struct device_attribute *attr, const char *buf,
282 size_t count)
283 {
284 struct vt8231_data *data = dev_get_drvdata(dev);
285 unsigned long val;
286 int err;
287
288 err = kstrtoul(buf, 10, &val);
289 if (err)
290 return err;
291
292 mutex_lock(&data->update_lock);
293 data->in_min[5] = clamp_val(((val * 958 * 34) / (10000 * 54)) + 3,
294 0, 255);
295 vt8231_write_value(data, regvoltmin[5], data->in_min[5]);
296 mutex_unlock(&data->update_lock);
297 return count;
298 }
299
300 static ssize_t in5_max_store(struct device *dev,
301 struct device_attribute *attr, const char *buf,
302 size_t count)
303 {
304 struct vt8231_data *data = dev_get_drvdata(dev);
305 unsigned long val;
306 int err;
307
308 err = kstrtoul(buf, 10, &val);
309 if (err)
310 return err;
311
312 mutex_lock(&data->update_lock);
313 data->in_max[5] = clamp_val(((val * 958 * 34) / (10000 * 54)) + 3,
314 0, 255);
315 vt8231_write_value(data, regvoltmax[5], data->in_max[5]);
316 mutex_unlock(&data->update_lock);
317 return count;
318 }
319
320 static SENSOR_DEVICE_ATTR_RO(in0_input, in, 0);
321 static SENSOR_DEVICE_ATTR_RW(in0_min, in_min, 0);
322 static SENSOR_DEVICE_ATTR_RW(in0_max, in_max, 0);
323 static SENSOR_DEVICE_ATTR_RO(in1_input, in, 1);
324 static SENSOR_DEVICE_ATTR_RW(in1_min, in_min, 1);
325 static SENSOR_DEVICE_ATTR_RW(in1_max, in_max, 1);
326 static SENSOR_DEVICE_ATTR_RO(in2_input, in, 2);
327 static SENSOR_DEVICE_ATTR_RW(in2_min, in_min, 2);
328 static SENSOR_DEVICE_ATTR_RW(in2_max, in_max, 2);
329 static SENSOR_DEVICE_ATTR_RO(in3_input, in, 3);
330 static SENSOR_DEVICE_ATTR_RW(in3_min, in_min, 3);
331 static SENSOR_DEVICE_ATTR_RW(in3_max, in_max, 3);
332 static SENSOR_DEVICE_ATTR_RO(in4_input, in, 4);
333 static SENSOR_DEVICE_ATTR_RW(in4_min, in_min, 4);
334 static SENSOR_DEVICE_ATTR_RW(in4_max, in_max, 4);
335
336 static DEVICE_ATTR_RO(in5_input);
337 static DEVICE_ATTR_RW(in5_min);
338 static DEVICE_ATTR_RW(in5_max);
339
340 /* Temperatures */
341 static ssize_t temp1_input_show(struct device *dev,
342 struct device_attribute *attr, char *buf)
343 {
344 struct vt8231_data *data = vt8231_update_device(dev);
345 return sprintf(buf, "%d\n", data->temp[0] * 250);
346 }
347
348 static ssize_t temp1_max_show(struct device *dev, struct device_attribute *attr,
349 char *buf)
350 {
351 struct vt8231_data *data = vt8231_update_device(dev);
352 return sprintf(buf, "%d\n", data->temp_max[0] * 1000);
353 }
354
355 static ssize_t temp1_max_hyst_show(struct device *dev,
356 struct device_attribute *attr, char *buf)
357 {
358 struct vt8231_data *data = vt8231_update_device(dev);
359 return sprintf(buf, "%d\n", data->temp_min[0] * 1000);
360 }
361
362 static ssize_t temp1_max_store(struct device *dev,
363 struct device_attribute *attr, const char *buf,
364 size_t count)
365 {
366 struct vt8231_data *data = dev_get_drvdata(dev);
367 long val;
368 int err;
369
370 err = kstrtol(buf, 10, &val);
371 if (err)
372 return err;
373
374 mutex_lock(&data->update_lock);
375 data->temp_max[0] = clamp_val((val + 500) / 1000, 0, 255);
376 vt8231_write_value(data, regtempmax[0], data->temp_max[0]);
377 mutex_unlock(&data->update_lock);
378 return count;
379 }
380 static ssize_t temp1_max_hyst_store(struct device *dev,
381 struct device_attribute *attr,
382 const char *buf, size_t count)
383 {
384 struct vt8231_data *data = dev_get_drvdata(dev);
385 long val;
386 int err;
387
388 err = kstrtol(buf, 10, &val);
389 if (err)
390 return err;
391
392 mutex_lock(&data->update_lock);
393 data->temp_min[0] = clamp_val((val + 500) / 1000, 0, 255);
394 vt8231_write_value(data, regtempmin[0], data->temp_min[0]);
395 mutex_unlock(&data->update_lock);
396 return count;
397 }
398
399 static ssize_t temp_show(struct device *dev, struct device_attribute *attr,
400 char *buf)
401 {
402 struct sensor_device_attribute *sensor_attr = to_sensor_dev_attr(attr);
403 int nr = sensor_attr->index;
404 struct vt8231_data *data = vt8231_update_device(dev);
405 return sprintf(buf, "%d\n", TEMP_FROM_REG(data->temp[nr]));
406 }
407
408 static ssize_t temp_max_show(struct device *dev,
409 struct device_attribute *attr, char *buf)
410 {
411 struct sensor_device_attribute *sensor_attr = to_sensor_dev_attr(attr);
412 int nr = sensor_attr->index;
413 struct vt8231_data *data = vt8231_update_device(dev);
414 return sprintf(buf, "%d\n", TEMP_MAXMIN_FROM_REG(data->temp_max[nr]));
415 }
416
417 static ssize_t temp_min_show(struct device *dev,
418 struct device_attribute *attr, char *buf)
419 {
420 struct sensor_device_attribute *sensor_attr = to_sensor_dev_attr(attr);
421 int nr = sensor_attr->index;
422 struct vt8231_data *data = vt8231_update_device(dev);
423 return sprintf(buf, "%d\n", TEMP_MAXMIN_FROM_REG(data->temp_min[nr]));
424 }
425
426 static ssize_t temp_max_store(struct device *dev,
427 struct device_attribute *attr, const char *buf,
428 size_t count)
429 {
430 struct sensor_device_attribute *sensor_attr = to_sensor_dev_attr(attr);
431 int nr = sensor_attr->index;
432 struct vt8231_data *data = dev_get_drvdata(dev);
433 long val;
434 int err;
435
436 err = kstrtol(buf, 10, &val);
437 if (err)
438 return err;
439
440 mutex_lock(&data->update_lock);
441 data->temp_max[nr] = clamp_val(TEMP_MAXMIN_TO_REG(val), 0, 255);
442 vt8231_write_value(data, regtempmax[nr], data->temp_max[nr]);
443 mutex_unlock(&data->update_lock);
444 return count;
445 }
446 static ssize_t temp_min_store(struct device *dev,
447 struct device_attribute *attr, const char *buf,
448 size_t count)
449 {
450 struct sensor_device_attribute *sensor_attr = to_sensor_dev_attr(attr);
451 int nr = sensor_attr->index;
452 struct vt8231_data *data = dev_get_drvdata(dev);
453 long val;
454 int err;
455
456 err = kstrtol(buf, 10, &val);
457 if (err)
458 return err;
459
460 mutex_lock(&data->update_lock);
461 data->temp_min[nr] = clamp_val(TEMP_MAXMIN_TO_REG(val), 0, 255);
462 vt8231_write_value(data, regtempmin[nr], data->temp_min[nr]);
463 mutex_unlock(&data->update_lock);
464 return count;
465 }
466
467 /*
468 * Note that these map the Linux temperature sensor numbering (1-6) to the VIA
469 * temperature sensor numbering (0-5)
470 */
471
472 static DEVICE_ATTR_RO(temp1_input);
473 static DEVICE_ATTR_RW(temp1_max);
474 static DEVICE_ATTR_RW(temp1_max_hyst);
475
476 static SENSOR_DEVICE_ATTR_RO(temp2_input, temp, 1);
477 static SENSOR_DEVICE_ATTR_RW(temp2_max, temp_max, 1);
478 static SENSOR_DEVICE_ATTR_RW(temp2_max_hyst, temp_min, 1);
479 static SENSOR_DEVICE_ATTR_RO(temp3_input, temp, 2);
480 static SENSOR_DEVICE_ATTR_RW(temp3_max, temp_max, 2);
481 static SENSOR_DEVICE_ATTR_RW(temp3_max_hyst, temp_min, 2);
482 static SENSOR_DEVICE_ATTR_RO(temp4_input, temp, 3);
483 static SENSOR_DEVICE_ATTR_RW(temp4_max, temp_max, 3);
484 static SENSOR_DEVICE_ATTR_RW(temp4_max_hyst, temp_min, 3);
485 static SENSOR_DEVICE_ATTR_RO(temp5_input, temp, 4);
486 static SENSOR_DEVICE_ATTR_RW(temp5_max, temp_max, 4);
487 static SENSOR_DEVICE_ATTR_RW(temp5_max_hyst, temp_min, 4);
488 static SENSOR_DEVICE_ATTR_RO(temp6_input, temp, 5);
489 static SENSOR_DEVICE_ATTR_RW(temp6_max, temp_max, 5);
490 static SENSOR_DEVICE_ATTR_RW(temp6_max_hyst, temp_min, 5);
491
492 /* Fans */
493 static ssize_t fan_show(struct device *dev, struct device_attribute *attr,
494 char *buf)
495 {
496 struct sensor_device_attribute *sensor_attr = to_sensor_dev_attr(attr);
497 int nr = sensor_attr->index;
498 struct vt8231_data *data = vt8231_update_device(dev);
499 return sprintf(buf, "%d\n", FAN_FROM_REG(data->fan[nr],
500 DIV_FROM_REG(data->fan_div[nr])));
501 }
502
503 static ssize_t fan_min_show(struct device *dev, struct device_attribute *attr,
504 char *buf)
505 {
506 struct sensor_device_attribute *sensor_attr = to_sensor_dev_attr(attr);
507 int nr = sensor_attr->index;
508 struct vt8231_data *data = vt8231_update_device(dev);
509 return sprintf(buf, "%d\n", FAN_FROM_REG(data->fan_min[nr],
510 DIV_FROM_REG(data->fan_div[nr])));
511 }
512
513 static ssize_t fan_div_show(struct device *dev, struct device_attribute *attr,
514 char *buf)
515 {
516 struct sensor_device_attribute *sensor_attr = to_sensor_dev_attr(attr);
517 int nr = sensor_attr->index;
518 struct vt8231_data *data = vt8231_update_device(dev);
519 return sprintf(buf, "%d\n", DIV_FROM_REG(data->fan_div[nr]));
520 }
521
522 static ssize_t fan_min_store(struct device *dev,
523 struct device_attribute *attr, const char *buf,
524 size_t count)
525 {
526 struct sensor_device_attribute *sensor_attr = to_sensor_dev_attr(attr);
527 int nr = sensor_attr->index;
528 struct vt8231_data *data = dev_get_drvdata(dev);
529 unsigned long val;
530 int err;
531
532 err = kstrtoul(buf, 10, &val);
533 if (err)
534 return err;
535
536 mutex_lock(&data->update_lock);
537 data->fan_min[nr] = FAN_TO_REG(val, DIV_FROM_REG(data->fan_div[nr]));
538 vt8231_write_value(data, VT8231_REG_FAN_MIN(nr), data->fan_min[nr]);
539 mutex_unlock(&data->update_lock);
540 return count;
541 }
542
543 static ssize_t fan_div_store(struct device *dev,
544 struct device_attribute *attr, const char *buf,
545 size_t count)
546 {
547 struct vt8231_data *data = dev_get_drvdata(dev);
548 struct sensor_device_attribute *sensor_attr = to_sensor_dev_attr(attr);
549 unsigned long val;
550 int nr = sensor_attr->index;
551 int old = vt8231_read_value(data, VT8231_REG_FANDIV);
552 long min = FAN_FROM_REG(data->fan_min[nr],
553 DIV_FROM_REG(data->fan_div[nr]));
554 int err;
555
556 err = kstrtoul(buf, 10, &val);
557 if (err)
558 return err;
559
560 mutex_lock(&data->update_lock);
561 switch (val) {
562 case 1:
563 data->fan_div[nr] = 0;
564 break;
565 case 2:
566 data->fan_div[nr] = 1;
567 break;
568 case 4:
569 data->fan_div[nr] = 2;
570 break;
571 case 8:
572 data->fan_div[nr] = 3;
573 break;
574 default:
575 dev_err(dev,
576 "fan_div value %ld not supported. Choose one of 1, 2, 4 or 8!\n",
577 val);
578 mutex_unlock(&data->update_lock);
579 return -EINVAL;
580 }
581
582 /* Correct the fan minimum speed */
583 data->fan_min[nr] = FAN_TO_REG(min, DIV_FROM_REG(data->fan_div[nr]));
584 vt8231_write_value(data, VT8231_REG_FAN_MIN(nr), data->fan_min[nr]);
585
586 old = (old & 0x0f) | (data->fan_div[1] << 6) | (data->fan_div[0] << 4);
587 vt8231_write_value(data, VT8231_REG_FANDIV, old);
588 mutex_unlock(&data->update_lock);
589 return count;
590 }
591
592 static SENSOR_DEVICE_ATTR_RO(fan1_input, fan, 0);
593 static SENSOR_DEVICE_ATTR_RW(fan1_min, fan_min, 0);
594 static SENSOR_DEVICE_ATTR_RW(fan1_div, fan_div, 0);
595 static SENSOR_DEVICE_ATTR_RO(fan2_input, fan, 1);
596 static SENSOR_DEVICE_ATTR_RW(fan2_min, fan_min, 1);
597 static SENSOR_DEVICE_ATTR_RW(fan2_div, fan_div, 1);
598
599 /* Alarms */
600 static ssize_t alarms_show(struct device *dev, struct device_attribute *attr,
601 char *buf)
602 {
603 struct vt8231_data *data = vt8231_update_device(dev);
604 return sprintf(buf, "%d\n", data->alarms);
605 }
606 static DEVICE_ATTR_RO(alarms);
607
608 static ssize_t alarm_show(struct device *dev, struct device_attribute *attr,
609 char *buf)
610 {
611 int bitnr = to_sensor_dev_attr(attr)->index;
612 struct vt8231_data *data = vt8231_update_device(dev);
613 return sprintf(buf, "%u\n", (data->alarms >> bitnr) & 1);
614 }
615 static SENSOR_DEVICE_ATTR_RO(temp1_alarm, alarm, 4);
616 static SENSOR_DEVICE_ATTR_RO(temp2_alarm, alarm, 11);
617 static SENSOR_DEVICE_ATTR_RO(temp3_alarm, alarm, 0);
618 static SENSOR_DEVICE_ATTR_RO(temp4_alarm, alarm, 1);
619 static SENSOR_DEVICE_ATTR_RO(temp5_alarm, alarm, 3);
620 static SENSOR_DEVICE_ATTR_RO(temp6_alarm, alarm, 8);
621 static SENSOR_DEVICE_ATTR_RO(in0_alarm, alarm, 11);
622 static SENSOR_DEVICE_ATTR_RO(in1_alarm, alarm, 0);
623 static SENSOR_DEVICE_ATTR_RO(in2_alarm, alarm, 1);
624 static SENSOR_DEVICE_ATTR_RO(in3_alarm, alarm, 3);
625 static SENSOR_DEVICE_ATTR_RO(in4_alarm, alarm, 8);
626 static SENSOR_DEVICE_ATTR_RO(in5_alarm, alarm, 2);
627 static SENSOR_DEVICE_ATTR_RO(fan1_alarm, alarm, 6);
628 static SENSOR_DEVICE_ATTR_RO(fan2_alarm, alarm, 7);
629
630 static ssize_t name_show(struct device *dev, struct device_attribute
631 *devattr, char *buf)
632 {
633 struct vt8231_data *data = dev_get_drvdata(dev);
634 return sprintf(buf, "%s\n", data->name);
635 }
636 static DEVICE_ATTR_RO(name);
637
638 static struct attribute *vt8231_attributes_temps[6][5] = {
639 {
640 &dev_attr_temp1_input.attr,
641 &dev_attr_temp1_max_hyst.attr,
642 &dev_attr_temp1_max.attr,
643 &sensor_dev_attr_temp1_alarm.dev_attr.attr,
644 NULL
645 }, {
646 &sensor_dev_attr_temp2_input.dev_attr.attr,
647 &sensor_dev_attr_temp2_max_hyst.dev_attr.attr,
648 &sensor_dev_attr_temp2_max.dev_attr.attr,
649 &sensor_dev_attr_temp2_alarm.dev_attr.attr,
650 NULL
651 }, {
652 &sensor_dev_attr_temp3_input.dev_attr.attr,
653 &sensor_dev_attr_temp3_max_hyst.dev_attr.attr,
654 &sensor_dev_attr_temp3_max.dev_attr.attr,
655 &sensor_dev_attr_temp3_alarm.dev_attr.attr,
656 NULL
657 }, {
658 &sensor_dev_attr_temp4_input.dev_attr.attr,
659 &sensor_dev_attr_temp4_max_hyst.dev_attr.attr,
660 &sensor_dev_attr_temp4_max.dev_attr.attr,
661 &sensor_dev_attr_temp4_alarm.dev_attr.attr,
662 NULL
663 }, {
664 &sensor_dev_attr_temp5_input.dev_attr.attr,
665 &sensor_dev_attr_temp5_max_hyst.dev_attr.attr,
666 &sensor_dev_attr_temp5_max.dev_attr.attr,
667 &sensor_dev_attr_temp5_alarm.dev_attr.attr,
668 NULL
669 }, {
670 &sensor_dev_attr_temp6_input.dev_attr.attr,
671 &sensor_dev_attr_temp6_max_hyst.dev_attr.attr,
672 &sensor_dev_attr_temp6_max.dev_attr.attr,
673 &sensor_dev_attr_temp6_alarm.dev_attr.attr,
674 NULL
675 }
676 };
677
678 static const struct attribute_group vt8231_group_temps[6] = {
679 { .attrs = vt8231_attributes_temps[0] },
680 { .attrs = vt8231_attributes_temps[1] },
681 { .attrs = vt8231_attributes_temps[2] },
682 { .attrs = vt8231_attributes_temps[3] },
683 { .attrs = vt8231_attributes_temps[4] },
684 { .attrs = vt8231_attributes_temps[5] },
685 };
686
687 static struct attribute *vt8231_attributes_volts[6][5] = {
688 {
689 &sensor_dev_attr_in0_input.dev_attr.attr,
690 &sensor_dev_attr_in0_min.dev_attr.attr,
691 &sensor_dev_attr_in0_max.dev_attr.attr,
692 &sensor_dev_attr_in0_alarm.dev_attr.attr,
693 NULL
694 }, {
695 &sensor_dev_attr_in1_input.dev_attr.attr,
696 &sensor_dev_attr_in1_min.dev_attr.attr,
697 &sensor_dev_attr_in1_max.dev_attr.attr,
698 &sensor_dev_attr_in1_alarm.dev_attr.attr,
699 NULL
700 }, {
701 &sensor_dev_attr_in2_input.dev_attr.attr,
702 &sensor_dev_attr_in2_min.dev_attr.attr,
703 &sensor_dev_attr_in2_max.dev_attr.attr,
704 &sensor_dev_attr_in2_alarm.dev_attr.attr,
705 NULL
706 }, {
707 &sensor_dev_attr_in3_input.dev_attr.attr,
708 &sensor_dev_attr_in3_min.dev_attr.attr,
709 &sensor_dev_attr_in3_max.dev_attr.attr,
710 &sensor_dev_attr_in3_alarm.dev_attr.attr,
711 NULL
712 }, {
713 &sensor_dev_attr_in4_input.dev_attr.attr,
714 &sensor_dev_attr_in4_min.dev_attr.attr,
715 &sensor_dev_attr_in4_max.dev_attr.attr,
716 &sensor_dev_attr_in4_alarm.dev_attr.attr,
717 NULL
718 }, {
719 &dev_attr_in5_input.attr,
720 &dev_attr_in5_min.attr,
721 &dev_attr_in5_max.attr,
722 &sensor_dev_attr_in5_alarm.dev_attr.attr,
723 NULL
724 }
725 };
726
727 static const struct attribute_group vt8231_group_volts[6] = {
728 { .attrs = vt8231_attributes_volts[0] },
729 { .attrs = vt8231_attributes_volts[1] },
730 { .attrs = vt8231_attributes_volts[2] },
731 { .attrs = vt8231_attributes_volts[3] },
732 { .attrs = vt8231_attributes_volts[4] },
733 { .attrs = vt8231_attributes_volts[5] },
734 };
735
736 static struct attribute *vt8231_attributes[] = {
737 &sensor_dev_attr_fan1_input.dev_attr.attr,
738 &sensor_dev_attr_fan2_input.dev_attr.attr,
739 &sensor_dev_attr_fan1_min.dev_attr.attr,
740 &sensor_dev_attr_fan2_min.dev_attr.attr,
741 &sensor_dev_attr_fan1_div.dev_attr.attr,
742 &sensor_dev_attr_fan2_div.dev_attr.attr,
743 &sensor_dev_attr_fan1_alarm.dev_attr.attr,
744 &sensor_dev_attr_fan2_alarm.dev_attr.attr,
745 &dev_attr_alarms.attr,
746 &dev_attr_name.attr,
747 NULL
748 };
749
750 static const struct attribute_group vt8231_group = {
751 .attrs = vt8231_attributes,
752 };
753
754 static struct platform_driver vt8231_driver = {
755 .driver = {
756 .name = "vt8231",
757 },
758 .probe = vt8231_probe,
759 .remove = vt8231_remove,
760 };
761
762 static const struct pci_device_id vt8231_pci_ids[] = {
763 { PCI_DEVICE(PCI_VENDOR_ID_VIA, PCI_DEVICE_ID_VIA_8231_4) },
764 { 0, }
765 };
766
767 MODULE_DEVICE_TABLE(pci, vt8231_pci_ids);
768
769 static int vt8231_pci_probe(struct pci_dev *dev,
770 const struct pci_device_id *id);
771
772 static struct pci_driver vt8231_pci_driver = {
773 .name = "vt8231",
774 .id_table = vt8231_pci_ids,
775 .probe = vt8231_pci_probe,
776 };
777
778 static int vt8231_probe(struct platform_device *pdev)
779 {
780 struct resource *res;
781 struct vt8231_data *data;
782 int err = 0, i;
783
784 /* Reserve the ISA region */
785 res = platform_get_resource(pdev, IORESOURCE_IO, 0);
786 if (!devm_request_region(&pdev->dev, res->start, VT8231_EXTENT,
787 vt8231_driver.driver.name)) {
788 dev_err(&pdev->dev, "Region 0x%lx-0x%lx already in use!\n",
789 (unsigned long)res->start, (unsigned long)res->end);
790 return -ENODEV;
791 }
792
793 data = devm_kzalloc(&pdev->dev, sizeof(struct vt8231_data), GFP_KERNEL);
794 if (!data)
795 return -ENOMEM;
796
797 platform_set_drvdata(pdev, data);
798 data->addr = res->start;
799 data->name = "vt8231";
800
801 mutex_init(&data->update_lock);
802 vt8231_init_device(data);
803
804 /* Register sysfs hooks */
805 err = sysfs_create_group(&pdev->dev.kobj, &vt8231_group);
806 if (err)
807 return err;
808
809 /* Must update device information to find out the config field */
810 data->uch_config = vt8231_read_value(data, VT8231_REG_UCH_CONFIG);
811
812 for (i = 0; i < ARRAY_SIZE(vt8231_group_temps); i++) {
813 if (ISTEMP(i, data->uch_config)) {
814 err = sysfs_create_group(&pdev->dev.kobj,
815 &vt8231_group_temps[i]);
816 if (err)
817 goto exit_remove_files;
818 }
819 }
820
821 for (i = 0; i < ARRAY_SIZE(vt8231_group_volts); i++) {
822 if (ISVOLT(i, data->uch_config)) {
823 err = sysfs_create_group(&pdev->dev.kobj,
824 &vt8231_group_volts[i]);
825 if (err)
826 goto exit_remove_files;
827 }
828 }
829
830 data->hwmon_dev = hwmon_device_register(&pdev->dev);
831 if (IS_ERR(data->hwmon_dev)) {
832 err = PTR_ERR(data->hwmon_dev);
833 goto exit_remove_files;
834 }
835 return 0;
836
837 exit_remove_files:
838 for (i = 0; i < ARRAY_SIZE(vt8231_group_volts); i++)
839 sysfs_remove_group(&pdev->dev.kobj, &vt8231_group_volts[i]);
840
841 for (i = 0; i < ARRAY_SIZE(vt8231_group_temps); i++)
842 sysfs_remove_group(&pdev->dev.kobj, &vt8231_group_temps[i]);
843
844 sysfs_remove_group(&pdev->dev.kobj, &vt8231_group);
845 return err;
846 }
847
848 static int vt8231_remove(struct platform_device *pdev)
849 {
850 struct vt8231_data *data = platform_get_drvdata(pdev);
851 int i;
852
853 hwmon_device_unregister(data->hwmon_dev);
854
855 for (i = 0; i < ARRAY_SIZE(vt8231_group_volts); i++)
856 sysfs_remove_group(&pdev->dev.kobj, &vt8231_group_volts[i]);
857
858 for (i = 0; i < ARRAY_SIZE(vt8231_group_temps); i++)
859 sysfs_remove_group(&pdev->dev.kobj, &vt8231_group_temps[i]);
860
861 sysfs_remove_group(&pdev->dev.kobj, &vt8231_group);
862
863 return 0;
864 }
865
866 static void vt8231_init_device(struct vt8231_data *data)
867 {
868 vt8231_write_value(data, VT8231_REG_TEMP1_CONFIG, 0);
869 vt8231_write_value(data, VT8231_REG_TEMP2_CONFIG, 0);
870 }
871
872 static struct vt8231_data *vt8231_update_device(struct device *dev)
873 {
874 struct vt8231_data *data = dev_get_drvdata(dev);
875 int i;
876 u16 low;
877
878 mutex_lock(&data->update_lock);
879
880 if (time_after(jiffies, data->last_updated + HZ + HZ / 2)
881 || !data->valid) {
882 for (i = 0; i < 6; i++) {
883 if (ISVOLT(i, data->uch_config)) {
884 data->in[i] = vt8231_read_value(data,
885 regvolt[i]);
886 data->in_min[i] = vt8231_read_value(data,
887 regvoltmin[i]);
888 data->in_max[i] = vt8231_read_value(data,
889 regvoltmax[i]);
890 }
891 }
892 for (i = 0; i < 2; i++) {
893 data->fan[i] = vt8231_read_value(data,
894 VT8231_REG_FAN(i));
895 data->fan_min[i] = vt8231_read_value(data,
896 VT8231_REG_FAN_MIN(i));
897 }
898
899 low = vt8231_read_value(data, VT8231_REG_TEMP_LOW01);
900 low = (low >> 6) | ((low & 0x30) >> 2)
901 | (vt8231_read_value(data, VT8231_REG_TEMP_LOW25) << 4);
902 for (i = 0; i < 6; i++) {
903 if (ISTEMP(i, data->uch_config)) {
904 data->temp[i] = (vt8231_read_value(data,
905 regtemp[i]) << 2)
906 | ((low >> (2 * i)) & 0x03);
907 data->temp_max[i] = vt8231_read_value(data,
908 regtempmax[i]);
909 data->temp_min[i] = vt8231_read_value(data,
910 regtempmin[i]);
911 }
912 }
913
914 i = vt8231_read_value(data, VT8231_REG_FANDIV);
915 data->fan_div[0] = (i >> 4) & 0x03;
916 data->fan_div[1] = i >> 6;
917 data->alarms = vt8231_read_value(data, VT8231_REG_ALARM1) |
918 (vt8231_read_value(data, VT8231_REG_ALARM2) << 8);
919
920 /* Set alarm flags correctly */
921 if (!data->fan[0] && data->fan_min[0])
922 data->alarms |= 0x40;
923 else if (data->fan[0] && !data->fan_min[0])
924 data->alarms &= ~0x40;
925
926 if (!data->fan[1] && data->fan_min[1])
927 data->alarms |= 0x80;
928 else if (data->fan[1] && !data->fan_min[1])
929 data->alarms &= ~0x80;
930
931 data->last_updated = jiffies;
932 data->valid = 1;
933 }
934
935 mutex_unlock(&data->update_lock);
936
937 return data;
938 }
939
940 static int vt8231_device_add(unsigned short address)
941 {
942 struct resource res = {
943 .start = address,
944 .end = address + VT8231_EXTENT - 1,
945 .name = "vt8231",
946 .flags = IORESOURCE_IO,
947 };
948 int err;
949
950 err = acpi_check_resource_conflict(&res);
951 if (err)
952 goto exit;
953
954 pdev = platform_device_alloc("vt8231", address);
955 if (!pdev) {
956 err = -ENOMEM;
957 pr_err("Device allocation failed\n");
958 goto exit;
959 }
960
961 err = platform_device_add_resources(pdev, &res, 1);
962 if (err) {
963 pr_err("Device resource addition failed (%d)\n", err);
964 goto exit_device_put;
965 }
966
967 err = platform_device_add(pdev);
968 if (err) {
969 pr_err("Device addition failed (%d)\n", err);
970 goto exit_device_put;
971 }
972
973 return 0;
974
975 exit_device_put:
976 platform_device_put(pdev);
977 exit:
978 return err;
979 }
980
981 static int vt8231_pci_probe(struct pci_dev *dev,
982 const struct pci_device_id *id)
983 {
984 u16 address, val;
985 if (force_addr) {
986 address = force_addr & 0xff00;
987 dev_warn(&dev->dev, "Forcing ISA address 0x%x\n",
988 address);
989
990 if (PCIBIOS_SUCCESSFUL !=
991 pci_write_config_word(dev, VT8231_BASE_REG, address | 1))
992 return -ENODEV;
993 }
994
995 if (PCIBIOS_SUCCESSFUL != pci_read_config_word(dev, VT8231_BASE_REG,
996 &val))
997 return -ENODEV;
998
999 address = val & ~(VT8231_EXTENT - 1);
1000 if (address == 0) {
1001 dev_err(&dev->dev, "base address not set - upgrade BIOS or use force_addr=0xaddr\n");
1002 return -ENODEV;
1003 }
1004
1005 if (PCIBIOS_SUCCESSFUL != pci_read_config_word(dev, VT8231_ENABLE_REG,
1006 &val))
1007 return -ENODEV;
1008
1009 if (!(val & 0x0001)) {
1010 dev_warn(&dev->dev, "enabling sensors\n");
1011 if (PCIBIOS_SUCCESSFUL !=
1012 pci_write_config_word(dev, VT8231_ENABLE_REG,
1013 val | 0x0001))
1014 return -ENODEV;
1015 }
1016
1017 if (platform_driver_register(&vt8231_driver))
1018 goto exit;
1019
1020 /* Sets global pdev as a side effect */
1021 if (vt8231_device_add(address))
1022 goto exit_unregister;
1023
1024 /*
1025 * Always return failure here. This is to allow other drivers to bind
1026 * to this pci device. We don't really want to have control over the
1027 * pci device, we only wanted to read as few register values from it.
1028 */
1029
1030 /*
1031 * We do, however, mark ourselves as using the PCI device to stop it
1032 * getting unloaded.
1033 */
1034 s_bridge = pci_dev_get(dev);
1035 return -ENODEV;
1036
1037 exit_unregister:
1038 platform_driver_unregister(&vt8231_driver);
1039 exit:
1040 return -ENODEV;
1041 }
1042
1043 static int __init sm_vt8231_init(void)
1044 {
1045 return pci_register_driver(&vt8231_pci_driver);
1046 }
1047
1048 static void __exit sm_vt8231_exit(void)
1049 {
1050 pci_unregister_driver(&vt8231_pci_driver);
1051 if (s_bridge != NULL) {
1052 platform_device_unregister(pdev);
1053 platform_driver_unregister(&vt8231_driver);
1054 pci_dev_put(s_bridge);
1055 s_bridge = NULL;
1056 }
1057 }
1058
1059 MODULE_AUTHOR("Roger Lucas <vt8231@hiddenengine.co.uk>");
1060 MODULE_DESCRIPTION("VT8231 sensors");
1061 MODULE_LICENSE("GPL");
1062
1063 module_init(sm_vt8231_init);
1064 module_exit(sm_vt8231_exit);
Linux with added FPC-III support