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 */
FAN_TO_REG(long rpm,int div)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
vt8231_read_value(struct vt8231_data * data,u8 reg)183 static inline int vt8231_read_value(struct vt8231_data *data, u8 reg)
184 {
185 return inb_p(data->addr + reg);
186 }
187
vt8231_write_value(struct vt8231_data * data,u8 reg,u8 value)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 */
show_in(struct device * dev,struct device_attribute * attr,char * buf)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
show_in_min(struct device * dev,struct device_attribute * attr,char * buf)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
show_in_max(struct device * dev,struct device_attribute * attr,char * buf)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
set_in_min(struct device * dev,struct device_attribute * attr,const char * buf,size_t count)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
set_in_max(struct device * dev,struct device_attribute * attr,const char * buf,size_t count)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 */
in5_input_show(struct device * dev,struct device_attribute * attr,char * buf)266 static ssize_t in5_input_show(struct device *dev,
267 struct device_attribute *attr, char *buf)
268 {
269 struct vt8231_data *data = vt8231_update_device(dev);
270
271 return sprintf(buf, "%d\n",
272 (((data->in[5] - 3) * 10000 * 54) / (958 * 34)));
273 }
274
in5_min_show(struct device * dev,struct device_attribute * attr,char * buf)275 static ssize_t in5_min_show(struct device *dev, struct device_attribute *attr,
276 char *buf)
277 {
278 struct vt8231_data *data = vt8231_update_device(dev);
279
280 return sprintf(buf, "%d\n",
281 (((data->in_min[5] - 3) * 10000 * 54) / (958 * 34)));
282 }
283
in5_max_show(struct device * dev,struct device_attribute * attr,char * buf)284 static ssize_t in5_max_show(struct device *dev, struct device_attribute *attr,
285 char *buf)
286 {
287 struct vt8231_data *data = vt8231_update_device(dev);
288
289 return sprintf(buf, "%d\n",
290 (((data->in_max[5] - 3) * 10000 * 54) / (958 * 34)));
291 }
292
in5_min_store(struct device * dev,struct device_attribute * attr,const char * buf,size_t count)293 static ssize_t in5_min_store(struct device *dev,
294 struct device_attribute *attr, const char *buf,
295 size_t count)
296 {
297 struct vt8231_data *data = dev_get_drvdata(dev);
298 unsigned long val;
299 int err;
300
301 err = kstrtoul(buf, 10, &val);
302 if (err)
303 return err;
304
305 mutex_lock(&data->update_lock);
306 data->in_min[5] = clamp_val(((val * 958 * 34) / (10000 * 54)) + 3,
307 0, 255);
308 vt8231_write_value(data, regvoltmin[5], data->in_min[5]);
309 mutex_unlock(&data->update_lock);
310 return count;
311 }
312
in5_max_store(struct device * dev,struct device_attribute * attr,const char * buf,size_t count)313 static ssize_t in5_max_store(struct device *dev,
314 struct device_attribute *attr, const char *buf,
315 size_t count)
316 {
317 struct vt8231_data *data = dev_get_drvdata(dev);
318 unsigned long val;
319 int err;
320
321 err = kstrtoul(buf, 10, &val);
322 if (err)
323 return err;
324
325 mutex_lock(&data->update_lock);
326 data->in_max[5] = clamp_val(((val * 958 * 34) / (10000 * 54)) + 3,
327 0, 255);
328 vt8231_write_value(data, regvoltmax[5], data->in_max[5]);
329 mutex_unlock(&data->update_lock);
330 return count;
331 }
332
333 #define define_voltage_sysfs(offset) \
334 static SENSOR_DEVICE_ATTR(in##offset##_input, S_IRUGO, \
335 show_in, NULL, offset); \
336 static SENSOR_DEVICE_ATTR(in##offset##_min, S_IRUGO | S_IWUSR, \
337 show_in_min, set_in_min, offset); \
338 static SENSOR_DEVICE_ATTR(in##offset##_max, S_IRUGO | S_IWUSR, \
339 show_in_max, set_in_max, offset)
340
341 define_voltage_sysfs(0);
342 define_voltage_sysfs(1);
343 define_voltage_sysfs(2);
344 define_voltage_sysfs(3);
345 define_voltage_sysfs(4);
346
347 static DEVICE_ATTR_RO(in5_input);
348 static DEVICE_ATTR_RW(in5_min);
349 static DEVICE_ATTR_RW(in5_max);
350
351 /* Temperatures */
temp1_input_show(struct device * dev,struct device_attribute * attr,char * buf)352 static ssize_t temp1_input_show(struct device *dev,
353 struct device_attribute *attr, char *buf)
354 {
355 struct vt8231_data *data = vt8231_update_device(dev);
356 return sprintf(buf, "%d\n", data->temp[0] * 250);
357 }
358
temp1_max_show(struct device * dev,struct device_attribute * attr,char * buf)359 static ssize_t temp1_max_show(struct device *dev, struct device_attribute *attr,
360 char *buf)
361 {
362 struct vt8231_data *data = vt8231_update_device(dev);
363 return sprintf(buf, "%d\n", data->temp_max[0] * 1000);
364 }
365
temp1_max_hyst_show(struct device * dev,struct device_attribute * attr,char * buf)366 static ssize_t temp1_max_hyst_show(struct device *dev,
367 struct device_attribute *attr, char *buf)
368 {
369 struct vt8231_data *data = vt8231_update_device(dev);
370 return sprintf(buf, "%d\n", data->temp_min[0] * 1000);
371 }
372
temp1_max_store(struct device * dev,struct device_attribute * attr,const char * buf,size_t count)373 static ssize_t temp1_max_store(struct device *dev,
374 struct device_attribute *attr, const char *buf,
375 size_t count)
376 {
377 struct vt8231_data *data = dev_get_drvdata(dev);
378 long val;
379 int err;
380
381 err = kstrtol(buf, 10, &val);
382 if (err)
383 return err;
384
385 mutex_lock(&data->update_lock);
386 data->temp_max[0] = clamp_val((val + 500) / 1000, 0, 255);
387 vt8231_write_value(data, regtempmax[0], data->temp_max[0]);
388 mutex_unlock(&data->update_lock);
389 return count;
390 }
temp1_max_hyst_store(struct device * dev,struct device_attribute * attr,const char * buf,size_t count)391 static ssize_t temp1_max_hyst_store(struct device *dev,
392 struct device_attribute *attr,
393 const char *buf, size_t count)
394 {
395 struct vt8231_data *data = dev_get_drvdata(dev);
396 long val;
397 int err;
398
399 err = kstrtol(buf, 10, &val);
400 if (err)
401 return err;
402
403 mutex_lock(&data->update_lock);
404 data->temp_min[0] = clamp_val((val + 500) / 1000, 0, 255);
405 vt8231_write_value(data, regtempmin[0], data->temp_min[0]);
406 mutex_unlock(&data->update_lock);
407 return count;
408 }
409
show_temp(struct device * dev,struct device_attribute * attr,char * buf)410 static ssize_t show_temp(struct device *dev, struct device_attribute *attr,
411 char *buf)
412 {
413 struct sensor_device_attribute *sensor_attr = to_sensor_dev_attr(attr);
414 int nr = sensor_attr->index;
415 struct vt8231_data *data = vt8231_update_device(dev);
416 return sprintf(buf, "%d\n", TEMP_FROM_REG(data->temp[nr]));
417 }
418
show_temp_max(struct device * dev,struct device_attribute * attr,char * buf)419 static ssize_t show_temp_max(struct device *dev, struct device_attribute *attr,
420 char *buf)
421 {
422 struct sensor_device_attribute *sensor_attr = to_sensor_dev_attr(attr);
423 int nr = sensor_attr->index;
424 struct vt8231_data *data = vt8231_update_device(dev);
425 return sprintf(buf, "%d\n", TEMP_MAXMIN_FROM_REG(data->temp_max[nr]));
426 }
427
show_temp_min(struct device * dev,struct device_attribute * attr,char * buf)428 static ssize_t show_temp_min(struct device *dev, struct device_attribute *attr,
429 char *buf)
430 {
431 struct sensor_device_attribute *sensor_attr = to_sensor_dev_attr(attr);
432 int nr = sensor_attr->index;
433 struct vt8231_data *data = vt8231_update_device(dev);
434 return sprintf(buf, "%d\n", TEMP_MAXMIN_FROM_REG(data->temp_min[nr]));
435 }
436
set_temp_max(struct device * dev,struct device_attribute * attr,const char * buf,size_t count)437 static ssize_t set_temp_max(struct device *dev, struct device_attribute *attr,
438 const char *buf, size_t count)
439 {
440 struct sensor_device_attribute *sensor_attr = to_sensor_dev_attr(attr);
441 int nr = sensor_attr->index;
442 struct vt8231_data *data = dev_get_drvdata(dev);
443 long val;
444 int err;
445
446 err = kstrtol(buf, 10, &val);
447 if (err)
448 return err;
449
450 mutex_lock(&data->update_lock);
451 data->temp_max[nr] = clamp_val(TEMP_MAXMIN_TO_REG(val), 0, 255);
452 vt8231_write_value(data, regtempmax[nr], data->temp_max[nr]);
453 mutex_unlock(&data->update_lock);
454 return count;
455 }
set_temp_min(struct device * dev,struct device_attribute * attr,const char * buf,size_t count)456 static ssize_t set_temp_min(struct device *dev, struct device_attribute *attr,
457 const char *buf, size_t count)
458 {
459 struct sensor_device_attribute *sensor_attr = to_sensor_dev_attr(attr);
460 int nr = sensor_attr->index;
461 struct vt8231_data *data = dev_get_drvdata(dev);
462 long val;
463 int err;
464
465 err = kstrtol(buf, 10, &val);
466 if (err)
467 return err;
468
469 mutex_lock(&data->update_lock);
470 data->temp_min[nr] = clamp_val(TEMP_MAXMIN_TO_REG(val), 0, 255);
471 vt8231_write_value(data, regtempmin[nr], data->temp_min[nr]);
472 mutex_unlock(&data->update_lock);
473 return count;
474 }
475
476 /*
477 * Note that these map the Linux temperature sensor numbering (1-6) to the VIA
478 * temperature sensor numbering (0-5)
479 */
480 #define define_temperature_sysfs(offset) \
481 static SENSOR_DEVICE_ATTR(temp##offset##_input, S_IRUGO, \
482 show_temp, NULL, offset - 1); \
483 static SENSOR_DEVICE_ATTR(temp##offset##_max, S_IRUGO | S_IWUSR, \
484 show_temp_max, set_temp_max, offset - 1); \
485 static SENSOR_DEVICE_ATTR(temp##offset##_max_hyst, S_IRUGO | S_IWUSR, \
486 show_temp_min, set_temp_min, offset - 1)
487
488 static DEVICE_ATTR_RO(temp1_input);
489 static DEVICE_ATTR_RW(temp1_max);
490 static DEVICE_ATTR_RW(temp1_max_hyst);
491
492 define_temperature_sysfs(2);
493 define_temperature_sysfs(3);
494 define_temperature_sysfs(4);
495 define_temperature_sysfs(5);
496 define_temperature_sysfs(6);
497
498 /* Fans */
show_fan(struct device * dev,struct device_attribute * attr,char * buf)499 static ssize_t show_fan(struct device *dev, struct device_attribute *attr,
500 char *buf)
501 {
502 struct sensor_device_attribute *sensor_attr = to_sensor_dev_attr(attr);
503 int nr = sensor_attr->index;
504 struct vt8231_data *data = vt8231_update_device(dev);
505 return sprintf(buf, "%d\n", FAN_FROM_REG(data->fan[nr],
506 DIV_FROM_REG(data->fan_div[nr])));
507 }
508
show_fan_min(struct device * dev,struct device_attribute * attr,char * buf)509 static ssize_t show_fan_min(struct device *dev, struct device_attribute *attr,
510 char *buf)
511 {
512 struct sensor_device_attribute *sensor_attr = to_sensor_dev_attr(attr);
513 int nr = sensor_attr->index;
514 struct vt8231_data *data = vt8231_update_device(dev);
515 return sprintf(buf, "%d\n", FAN_FROM_REG(data->fan_min[nr],
516 DIV_FROM_REG(data->fan_div[nr])));
517 }
518
show_fan_div(struct device * dev,struct device_attribute * attr,char * buf)519 static ssize_t show_fan_div(struct device *dev, struct device_attribute *attr,
520 char *buf)
521 {
522 struct sensor_device_attribute *sensor_attr = to_sensor_dev_attr(attr);
523 int nr = sensor_attr->index;
524 struct vt8231_data *data = vt8231_update_device(dev);
525 return sprintf(buf, "%d\n", DIV_FROM_REG(data->fan_div[nr]));
526 }
527
set_fan_min(struct device * dev,struct device_attribute * attr,const char * buf,size_t count)528 static ssize_t set_fan_min(struct device *dev, struct device_attribute *attr,
529 const char *buf, size_t count)
530 {
531 struct sensor_device_attribute *sensor_attr = to_sensor_dev_attr(attr);
532 int nr = sensor_attr->index;
533 struct vt8231_data *data = dev_get_drvdata(dev);
534 unsigned long val;
535 int err;
536
537 err = kstrtoul(buf, 10, &val);
538 if (err)
539 return err;
540
541 mutex_lock(&data->update_lock);
542 data->fan_min[nr] = FAN_TO_REG(val, DIV_FROM_REG(data->fan_div[nr]));
543 vt8231_write_value(data, VT8231_REG_FAN_MIN(nr), data->fan_min[nr]);
544 mutex_unlock(&data->update_lock);
545 return count;
546 }
547
set_fan_div(struct device * dev,struct device_attribute * attr,const char * buf,size_t count)548 static ssize_t set_fan_div(struct device *dev, struct device_attribute *attr,
549 const char *buf, size_t count)
550 {
551 struct vt8231_data *data = dev_get_drvdata(dev);
552 struct sensor_device_attribute *sensor_attr = to_sensor_dev_attr(attr);
553 unsigned long val;
554 int nr = sensor_attr->index;
555 int old = vt8231_read_value(data, VT8231_REG_FANDIV);
556 long min = FAN_FROM_REG(data->fan_min[nr],
557 DIV_FROM_REG(data->fan_div[nr]));
558 int err;
559
560 err = kstrtoul(buf, 10, &val);
561 if (err)
562 return err;
563
564 mutex_lock(&data->update_lock);
565 switch (val) {
566 case 1:
567 data->fan_div[nr] = 0;
568 break;
569 case 2:
570 data->fan_div[nr] = 1;
571 break;
572 case 4:
573 data->fan_div[nr] = 2;
574 break;
575 case 8:
576 data->fan_div[nr] = 3;
577 break;
578 default:
579 dev_err(dev,
580 "fan_div value %ld not supported. Choose one of 1, 2, 4 or 8!\n",
581 val);
582 mutex_unlock(&data->update_lock);
583 return -EINVAL;
584 }
585
586 /* Correct the fan minimum speed */
587 data->fan_min[nr] = FAN_TO_REG(min, DIV_FROM_REG(data->fan_div[nr]));
588 vt8231_write_value(data, VT8231_REG_FAN_MIN(nr), data->fan_min[nr]);
589
590 old = (old & 0x0f) | (data->fan_div[1] << 6) | (data->fan_div[0] << 4);
591 vt8231_write_value(data, VT8231_REG_FANDIV, old);
592 mutex_unlock(&data->update_lock);
593 return count;
594 }
595
596
597 #define define_fan_sysfs(offset) \
598 static SENSOR_DEVICE_ATTR(fan##offset##_input, S_IRUGO, \
599 show_fan, NULL, offset - 1); \
600 static SENSOR_DEVICE_ATTR(fan##offset##_div, S_IRUGO | S_IWUSR, \
601 show_fan_div, set_fan_div, offset - 1); \
602 static SENSOR_DEVICE_ATTR(fan##offset##_min, S_IRUGO | S_IWUSR, \
603 show_fan_min, set_fan_min, offset - 1)
604
605 define_fan_sysfs(1);
606 define_fan_sysfs(2);
607
608 /* Alarms */
alarms_show(struct device * dev,struct device_attribute * attr,char * buf)609 static ssize_t alarms_show(struct device *dev, struct device_attribute *attr,
610 char *buf)
611 {
612 struct vt8231_data *data = vt8231_update_device(dev);
613 return sprintf(buf, "%d\n", data->alarms);
614 }
615 static DEVICE_ATTR_RO(alarms);
616
show_alarm(struct device * dev,struct device_attribute * attr,char * buf)617 static ssize_t show_alarm(struct device *dev, struct device_attribute *attr,
618 char *buf)
619 {
620 int bitnr = to_sensor_dev_attr(attr)->index;
621 struct vt8231_data *data = vt8231_update_device(dev);
622 return sprintf(buf, "%u\n", (data->alarms >> bitnr) & 1);
623 }
624 static SENSOR_DEVICE_ATTR(temp1_alarm, S_IRUGO, show_alarm, NULL, 4);
625 static SENSOR_DEVICE_ATTR(temp2_alarm, S_IRUGO, show_alarm, NULL, 11);
626 static SENSOR_DEVICE_ATTR(temp3_alarm, S_IRUGO, show_alarm, NULL, 0);
627 static SENSOR_DEVICE_ATTR(temp4_alarm, S_IRUGO, show_alarm, NULL, 1);
628 static SENSOR_DEVICE_ATTR(temp5_alarm, S_IRUGO, show_alarm, NULL, 3);
629 static SENSOR_DEVICE_ATTR(temp6_alarm, S_IRUGO, show_alarm, NULL, 8);
630 static SENSOR_DEVICE_ATTR(in0_alarm, S_IRUGO, show_alarm, NULL, 11);
631 static SENSOR_DEVICE_ATTR(in1_alarm, S_IRUGO, show_alarm, NULL, 0);
632 static SENSOR_DEVICE_ATTR(in2_alarm, S_IRUGO, show_alarm, NULL, 1);
633 static SENSOR_DEVICE_ATTR(in3_alarm, S_IRUGO, show_alarm, NULL, 3);
634 static SENSOR_DEVICE_ATTR(in4_alarm, S_IRUGO, show_alarm, NULL, 8);
635 static SENSOR_DEVICE_ATTR(in5_alarm, S_IRUGO, show_alarm, NULL, 2);
636 static SENSOR_DEVICE_ATTR(fan1_alarm, S_IRUGO, show_alarm, NULL, 6);
637 static SENSOR_DEVICE_ATTR(fan2_alarm, S_IRUGO, show_alarm, NULL, 7);
638
name_show(struct device * dev,struct device_attribute * devattr,char * buf)639 static ssize_t name_show(struct device *dev, struct device_attribute
640 *devattr, char *buf)
641 {
642 struct vt8231_data *data = dev_get_drvdata(dev);
643 return sprintf(buf, "%s\n", data->name);
644 }
645 static DEVICE_ATTR_RO(name);
646
647 static struct attribute *vt8231_attributes_temps[6][5] = {
648 {
649 &dev_attr_temp1_input.attr,
650 &dev_attr_temp1_max_hyst.attr,
651 &dev_attr_temp1_max.attr,
652 &sensor_dev_attr_temp1_alarm.dev_attr.attr,
653 NULL
654 }, {
655 &sensor_dev_attr_temp2_input.dev_attr.attr,
656 &sensor_dev_attr_temp2_max_hyst.dev_attr.attr,
657 &sensor_dev_attr_temp2_max.dev_attr.attr,
658 &sensor_dev_attr_temp2_alarm.dev_attr.attr,
659 NULL
660 }, {
661 &sensor_dev_attr_temp3_input.dev_attr.attr,
662 &sensor_dev_attr_temp3_max_hyst.dev_attr.attr,
663 &sensor_dev_attr_temp3_max.dev_attr.attr,
664 &sensor_dev_attr_temp3_alarm.dev_attr.attr,
665 NULL
666 }, {
667 &sensor_dev_attr_temp4_input.dev_attr.attr,
668 &sensor_dev_attr_temp4_max_hyst.dev_attr.attr,
669 &sensor_dev_attr_temp4_max.dev_attr.attr,
670 &sensor_dev_attr_temp4_alarm.dev_attr.attr,
671 NULL
672 }, {
673 &sensor_dev_attr_temp5_input.dev_attr.attr,
674 &sensor_dev_attr_temp5_max_hyst.dev_attr.attr,
675 &sensor_dev_attr_temp5_max.dev_attr.attr,
676 &sensor_dev_attr_temp5_alarm.dev_attr.attr,
677 NULL
678 }, {
679 &sensor_dev_attr_temp6_input.dev_attr.attr,
680 &sensor_dev_attr_temp6_max_hyst.dev_attr.attr,
681 &sensor_dev_attr_temp6_max.dev_attr.attr,
682 &sensor_dev_attr_temp6_alarm.dev_attr.attr,
683 NULL
684 }
685 };
686
687 static const struct attribute_group vt8231_group_temps[6] = {
688 { .attrs = vt8231_attributes_temps[0] },
689 { .attrs = vt8231_attributes_temps[1] },
690 { .attrs = vt8231_attributes_temps[2] },
691 { .attrs = vt8231_attributes_temps[3] },
692 { .attrs = vt8231_attributes_temps[4] },
693 { .attrs = vt8231_attributes_temps[5] },
694 };
695
696 static struct attribute *vt8231_attributes_volts[6][5] = {
697 {
698 &sensor_dev_attr_in0_input.dev_attr.attr,
699 &sensor_dev_attr_in0_min.dev_attr.attr,
700 &sensor_dev_attr_in0_max.dev_attr.attr,
701 &sensor_dev_attr_in0_alarm.dev_attr.attr,
702 NULL
703 }, {
704 &sensor_dev_attr_in1_input.dev_attr.attr,
705 &sensor_dev_attr_in1_min.dev_attr.attr,
706 &sensor_dev_attr_in1_max.dev_attr.attr,
707 &sensor_dev_attr_in1_alarm.dev_attr.attr,
708 NULL
709 }, {
710 &sensor_dev_attr_in2_input.dev_attr.attr,
711 &sensor_dev_attr_in2_min.dev_attr.attr,
712 &sensor_dev_attr_in2_max.dev_attr.attr,
713 &sensor_dev_attr_in2_alarm.dev_attr.attr,
714 NULL
715 }, {
716 &sensor_dev_attr_in3_input.dev_attr.attr,
717 &sensor_dev_attr_in3_min.dev_attr.attr,
718 &sensor_dev_attr_in3_max.dev_attr.attr,
719 &sensor_dev_attr_in3_alarm.dev_attr.attr,
720 NULL
721 }, {
722 &sensor_dev_attr_in4_input.dev_attr.attr,
723 &sensor_dev_attr_in4_min.dev_attr.attr,
724 &sensor_dev_attr_in4_max.dev_attr.attr,
725 &sensor_dev_attr_in4_alarm.dev_attr.attr,
726 NULL
727 }, {
728 &dev_attr_in5_input.attr,
729 &dev_attr_in5_min.attr,
730 &dev_attr_in5_max.attr,
731 &sensor_dev_attr_in5_alarm.dev_attr.attr,
732 NULL
733 }
734 };
735
736 static const struct attribute_group vt8231_group_volts[6] = {
737 { .attrs = vt8231_attributes_volts[0] },
738 { .attrs = vt8231_attributes_volts[1] },
739 { .attrs = vt8231_attributes_volts[2] },
740 { .attrs = vt8231_attributes_volts[3] },
741 { .attrs = vt8231_attributes_volts[4] },
742 { .attrs = vt8231_attributes_volts[5] },
743 };
744
745 static struct attribute *vt8231_attributes[] = {
746 &sensor_dev_attr_fan1_input.dev_attr.attr,
747 &sensor_dev_attr_fan2_input.dev_attr.attr,
748 &sensor_dev_attr_fan1_min.dev_attr.attr,
749 &sensor_dev_attr_fan2_min.dev_attr.attr,
750 &sensor_dev_attr_fan1_div.dev_attr.attr,
751 &sensor_dev_attr_fan2_div.dev_attr.attr,
752 &sensor_dev_attr_fan1_alarm.dev_attr.attr,
753 &sensor_dev_attr_fan2_alarm.dev_attr.attr,
754 &dev_attr_alarms.attr,
755 &dev_attr_name.attr,
756 NULL
757 };
758
759 static const struct attribute_group vt8231_group = {
760 .attrs = vt8231_attributes,
761 };
762
763 static struct platform_driver vt8231_driver = {
764 .driver = {
765 .name = "vt8231",
766 },
767 .probe = vt8231_probe,
768 .remove = vt8231_remove,
769 };
770
771 static const struct pci_device_id vt8231_pci_ids[] = {
772 { PCI_DEVICE(PCI_VENDOR_ID_VIA, PCI_DEVICE_ID_VIA_8231_4) },
773 { 0, }
774 };
775
776 MODULE_DEVICE_TABLE(pci, vt8231_pci_ids);
777
778 static int vt8231_pci_probe(struct pci_dev *dev,
779 const struct pci_device_id *id);
780
781 static struct pci_driver vt8231_pci_driver = {
782 .name = "vt8231",
783 .id_table = vt8231_pci_ids,
784 .probe = vt8231_pci_probe,
785 };
786
vt8231_probe(struct platform_device * pdev)787 static int vt8231_probe(struct platform_device *pdev)
788 {
789 struct resource *res;
790 struct vt8231_data *data;
791 int err = 0, i;
792
793 /* Reserve the ISA region */
794 res = platform_get_resource(pdev, IORESOURCE_IO, 0);
795 if (!devm_request_region(&pdev->dev, res->start, VT8231_EXTENT,
796 vt8231_driver.driver.name)) {
797 dev_err(&pdev->dev, "Region 0x%lx-0x%lx already in use!\n",
798 (unsigned long)res->start, (unsigned long)res->end);
799 return -ENODEV;
800 }
801
802 data = devm_kzalloc(&pdev->dev, sizeof(struct vt8231_data), GFP_KERNEL);
803 if (!data)
804 return -ENOMEM;
805
806 platform_set_drvdata(pdev, data);
807 data->addr = res->start;
808 data->name = "vt8231";
809
810 mutex_init(&data->update_lock);
811 vt8231_init_device(data);
812
813 /* Register sysfs hooks */
814 err = sysfs_create_group(&pdev->dev.kobj, &vt8231_group);
815 if (err)
816 return err;
817
818 /* Must update device information to find out the config field */
819 data->uch_config = vt8231_read_value(data, VT8231_REG_UCH_CONFIG);
820
821 for (i = 0; i < ARRAY_SIZE(vt8231_group_temps); i++) {
822 if (ISTEMP(i, data->uch_config)) {
823 err = sysfs_create_group(&pdev->dev.kobj,
824 &vt8231_group_temps[i]);
825 if (err)
826 goto exit_remove_files;
827 }
828 }
829
830 for (i = 0; i < ARRAY_SIZE(vt8231_group_volts); i++) {
831 if (ISVOLT(i, data->uch_config)) {
832 err = sysfs_create_group(&pdev->dev.kobj,
833 &vt8231_group_volts[i]);
834 if (err)
835 goto exit_remove_files;
836 }
837 }
838
839 data->hwmon_dev = hwmon_device_register(&pdev->dev);
840 if (IS_ERR(data->hwmon_dev)) {
841 err = PTR_ERR(data->hwmon_dev);
842 goto exit_remove_files;
843 }
844 return 0;
845
846 exit_remove_files:
847 for (i = 0; i < ARRAY_SIZE(vt8231_group_volts); i++)
848 sysfs_remove_group(&pdev->dev.kobj, &vt8231_group_volts[i]);
849
850 for (i = 0; i < ARRAY_SIZE(vt8231_group_temps); i++)
851 sysfs_remove_group(&pdev->dev.kobj, &vt8231_group_temps[i]);
852
853 sysfs_remove_group(&pdev->dev.kobj, &vt8231_group);
854 return err;
855 }
856
vt8231_remove(struct platform_device * pdev)857 static int vt8231_remove(struct platform_device *pdev)
858 {
859 struct vt8231_data *data = platform_get_drvdata(pdev);
860 int i;
861
862 hwmon_device_unregister(data->hwmon_dev);
863
864 for (i = 0; i < ARRAY_SIZE(vt8231_group_volts); i++)
865 sysfs_remove_group(&pdev->dev.kobj, &vt8231_group_volts[i]);
866
867 for (i = 0; i < ARRAY_SIZE(vt8231_group_temps); i++)
868 sysfs_remove_group(&pdev->dev.kobj, &vt8231_group_temps[i]);
869
870 sysfs_remove_group(&pdev->dev.kobj, &vt8231_group);
871
872 return 0;
873 }
874
vt8231_init_device(struct vt8231_data * data)875 static void vt8231_init_device(struct vt8231_data *data)
876 {
877 vt8231_write_value(data, VT8231_REG_TEMP1_CONFIG, 0);
878 vt8231_write_value(data, VT8231_REG_TEMP2_CONFIG, 0);
879 }
880
vt8231_update_device(struct device * dev)881 static struct vt8231_data *vt8231_update_device(struct device *dev)
882 {
883 struct vt8231_data *data = dev_get_drvdata(dev);
884 int i;
885 u16 low;
886
887 mutex_lock(&data->update_lock);
888
889 if (time_after(jiffies, data->last_updated + HZ + HZ / 2)
890 || !data->valid) {
891 for (i = 0; i < 6; i++) {
892 if (ISVOLT(i, data->uch_config)) {
893 data->in[i] = vt8231_read_value(data,
894 regvolt[i]);
895 data->in_min[i] = vt8231_read_value(data,
896 regvoltmin[i]);
897 data->in_max[i] = vt8231_read_value(data,
898 regvoltmax[i]);
899 }
900 }
901 for (i = 0; i < 2; i++) {
902 data->fan[i] = vt8231_read_value(data,
903 VT8231_REG_FAN(i));
904 data->fan_min[i] = vt8231_read_value(data,
905 VT8231_REG_FAN_MIN(i));
906 }
907
908 low = vt8231_read_value(data, VT8231_REG_TEMP_LOW01);
909 low = (low >> 6) | ((low & 0x30) >> 2)
910 | (vt8231_read_value(data, VT8231_REG_TEMP_LOW25) << 4);
911 for (i = 0; i < 6; i++) {
912 if (ISTEMP(i, data->uch_config)) {
913 data->temp[i] = (vt8231_read_value(data,
914 regtemp[i]) << 2)
915 | ((low >> (2 * i)) & 0x03);
916 data->temp_max[i] = vt8231_read_value(data,
917 regtempmax[i]);
918 data->temp_min[i] = vt8231_read_value(data,
919 regtempmin[i]);
920 }
921 }
922
923 i = vt8231_read_value(data, VT8231_REG_FANDIV);
924 data->fan_div[0] = (i >> 4) & 0x03;
925 data->fan_div[1] = i >> 6;
926 data->alarms = vt8231_read_value(data, VT8231_REG_ALARM1) |
927 (vt8231_read_value(data, VT8231_REG_ALARM2) << 8);
928
929 /* Set alarm flags correctly */
930 if (!data->fan[0] && data->fan_min[0])
931 data->alarms |= 0x40;
932 else if (data->fan[0] && !data->fan_min[0])
933 data->alarms &= ~0x40;
934
935 if (!data->fan[1] && data->fan_min[1])
936 data->alarms |= 0x80;
937 else if (data->fan[1] && !data->fan_min[1])
938 data->alarms &= ~0x80;
939
940 data->last_updated = jiffies;
941 data->valid = 1;
942 }
943
944 mutex_unlock(&data->update_lock);
945
946 return data;
947 }
948
vt8231_device_add(unsigned short address)949 static int vt8231_device_add(unsigned short address)
950 {
951 struct resource res = {
952 .start = address,
953 .end = address + VT8231_EXTENT - 1,
954 .name = "vt8231",
955 .flags = IORESOURCE_IO,
956 };
957 int err;
958
959 err = acpi_check_resource_conflict(&res);
960 if (err)
961 goto exit;
962
963 pdev = platform_device_alloc("vt8231", address);
964 if (!pdev) {
965 err = -ENOMEM;
966 pr_err("Device allocation failed\n");
967 goto exit;
968 }
969
970 err = platform_device_add_resources(pdev, &res, 1);
971 if (err) {
972 pr_err("Device resource addition failed (%d)\n", err);
973 goto exit_device_put;
974 }
975
976 err = platform_device_add(pdev);
977 if (err) {
978 pr_err("Device addition failed (%d)\n", err);
979 goto exit_device_put;
980 }
981
982 return 0;
983
984 exit_device_put:
985 platform_device_put(pdev);
986 exit:
987 return err;
988 }
989
vt8231_pci_probe(struct pci_dev * dev,const struct pci_device_id * id)990 static int vt8231_pci_probe(struct pci_dev *dev,
991 const struct pci_device_id *id)
992 {
993 u16 address, val;
994 if (force_addr) {
995 address = force_addr & 0xff00;
996 dev_warn(&dev->dev, "Forcing ISA address 0x%x\n",
997 address);
998
999 if (PCIBIOS_SUCCESSFUL !=
1000 pci_write_config_word(dev, VT8231_BASE_REG, address | 1))
1001 return -ENODEV;
1002 }
1003
1004 if (PCIBIOS_SUCCESSFUL != pci_read_config_word(dev, VT8231_BASE_REG,
1005 &val))
1006 return -ENODEV;
1007
1008 address = val & ~(VT8231_EXTENT - 1);
1009 if (address == 0) {
1010 dev_err(&dev->dev, "base address not set - upgrade BIOS or use force_addr=0xaddr\n");
1011 return -ENODEV;
1012 }
1013
1014 if (PCIBIOS_SUCCESSFUL != pci_read_config_word(dev, VT8231_ENABLE_REG,
1015 &val))
1016 return -ENODEV;
1017
1018 if (!(val & 0x0001)) {
1019 dev_warn(&dev->dev, "enabling sensors\n");
1020 if (PCIBIOS_SUCCESSFUL !=
1021 pci_write_config_word(dev, VT8231_ENABLE_REG,
1022 val | 0x0001))
1023 return -ENODEV;
1024 }
1025
1026 if (platform_driver_register(&vt8231_driver))
1027 goto exit;
1028
1029 /* Sets global pdev as a side effect */
1030 if (vt8231_device_add(address))
1031 goto exit_unregister;
1032
1033 /*
1034 * Always return failure here. This is to allow other drivers to bind
1035 * to this pci device. We don't really want to have control over the
1036 * pci device, we only wanted to read as few register values from it.
1037 */
1038
1039 /*
1040 * We do, however, mark ourselves as using the PCI device to stop it
1041 * getting unloaded.
1042 */
1043 s_bridge = pci_dev_get(dev);
1044 return -ENODEV;
1045
1046 exit_unregister:
1047 platform_driver_unregister(&vt8231_driver);
1048 exit:
1049 return -ENODEV;
1050 }
1051
sm_vt8231_init(void)1052 static int __init sm_vt8231_init(void)
1053 {
1054 return pci_register_driver(&vt8231_pci_driver);
1055 }
1056
sm_vt8231_exit(void)1057 static void __exit sm_vt8231_exit(void)
1058 {
1059 pci_unregister_driver(&vt8231_pci_driver);
1060 if (s_bridge != NULL) {
1061 platform_device_unregister(pdev);
1062 platform_driver_unregister(&vt8231_driver);
1063 pci_dev_put(s_bridge);
1064 s_bridge = NULL;
1065 }
1066 }
1067
1068 MODULE_AUTHOR("Roger Lucas <vt8231@hiddenengine.co.uk>");
1069 MODULE_DESCRIPTION("VT8231 sensors");
1070 MODULE_LICENSE("GPL");
1071
1072 module_init(sm_vt8231_init);
1073 module_exit(sm_vt8231_exit);
1074
