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Merge branch 'master' of git://git.kernel.org/pub/scm/linux/kernel/git/linville/wirel...
[linux.git] / drivers / hwmon / vt8231.c
CommitLineData
1de9e371
RL		 1/*
2 vt8231.c - Part of lm_sensors, Linux kernel modules
3 for hardware monitoring
4
af865765 5 Copyright (c) 2005 Roger Lucas <[email protected]>
1de9e371
RL		 6 Copyright (c) 2002 Mark D. Studebaker <[email protected]>
7 Aaron M. Marsh <[email protected]>
8
9 This program is free software; you can redistribute it and/or modify
10 it under the terms of the GNU General Public License as published by
11 the Free Software Foundation; either version 2 of the License, or
12 (at your option) any later version.
13
14 This program is distributed in the hope that it will be useful,
15 but WITHOUT ANY WARRANTY; without even the implied warranty of
16 MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
17 GNU General Public License for more details.
18
19 You should have received a copy of the GNU General Public License
20 along with this program; if not, write to the Free Software
21 Foundation, Inc., 675 Mass Ave, Cambridge, MA 02139, USA.
22*/
23
24/* Supports VIA VT8231 South Bridge embedded sensors
25*/
26
27#include <linux/module.h>
28#include <linux/init.h>
29#include <linux/slab.h>
30#include <linux/pci.h>
31#include <linux/jiffies.h>
ec5e1a4b 32#include <linux/platform_device.h>
1de9e371
RL		 33#include <linux/hwmon.h>
34#include <linux/hwmon-sysfs.h>
35#include <linux/hwmon-vid.h>
36#include <linux/err.h>
9a61bf63 37#include <linux/mutex.h>
1de9e371
RL		 38#include <asm/io.h>
39
40static int force_addr;
41module_param(force_addr, int, 0);
42MODULE_PARM_DESC(force_addr, "Initialize the base address of the sensors");
43
ec5e1a4b 44static struct platform_device *pdev;
1de9e371
RL		 45
46#define VT8231_EXTENT 0x80
47#define VT8231_BASE_REG 0x70
48#define VT8231_ENABLE_REG 0x74
49
50/* The VT8231 registers
51
52 The reset value for the input channel configuration is used (Reg 0x4A=0x07)
53 which sets the selected inputs marked with '*' below if multiple options are
54 possible:
55
56 Voltage Mode Temperature Mode
57 Sensor Linux Id Linux Id VIA Id
58 -------- -------- -------- ------
59 CPU Diode N/A temp1 0
60 UIC1 in0 temp2 * 1
61 UIC2 in1 * temp3 2
62 UIC3 in2 * temp4 3
63 UIC4 in3 * temp5 4
64 UIC5 in4 * temp6 5
65 3.3V in5 N/A
66
67 Note that the BIOS may set the configuration register to a different value
68 to match the motherboard configuration.
69*/
70
71/* fans numbered 0-1 */
72#define VT8231_REG_FAN_MIN(nr) (0x3b + (nr))
73#define VT8231_REG_FAN(nr) (0x29 + (nr))
74
75/* Voltage inputs numbered 0-5 */
76
77static const u8 regvolt[] = { 0x21, 0x22, 0x23, 0x24, 0x25, 0x26 };
78static const u8 regvoltmax[] = { 0x3d, 0x2b, 0x2d, 0x2f, 0x31, 0x33 };
79static const u8 regvoltmin[] = { 0x3e, 0x2c, 0x2e, 0x30, 0x32, 0x34 };
80
81/* Temperatures are numbered 1-6 according to the Linux kernel specification.
82**
83** In the VIA datasheet, however, the temperatures are numbered from zero.
84** Since it is important that this driver can easily be compared to the VIA
85** datasheet, we will use the VIA numbering within this driver and map the
86** kernel sysfs device name to the VIA number in the sysfs callback.
87*/
88
89#define VT8231_REG_TEMP_LOW01 0x49
90#define VT8231_REG_TEMP_LOW25 0x4d
91
92static const u8 regtemp[] = { 0x1f, 0x21, 0x22, 0x23, 0x24, 0x25 };
93static const u8 regtempmax[] = { 0x39, 0x3d, 0x2b, 0x2d, 0x2f, 0x31 };
94static const u8 regtempmin[] = { 0x3a, 0x3e, 0x2c, 0x2e, 0x30, 0x32 };
95
96#define TEMP_FROM_REG(reg) (((253 * 4 - (reg)) * 550 + 105) / 210)
97#define TEMP_MAXMIN_FROM_REG(reg) (((253 - (reg)) * 2200 + 105) / 210)
98#define TEMP_MAXMIN_TO_REG(val) (253 - ((val) * 210 + 1100) / 2200)
99
100#define VT8231_REG_CONFIG 0x40
101#define VT8231_REG_ALARM1 0x41
102#define VT8231_REG_ALARM2 0x42
103#define VT8231_REG_FANDIV 0x47
104#define VT8231_REG_UCH_CONFIG 0x4a
105#define VT8231_REG_TEMP1_CONFIG 0x4b
106#define VT8231_REG_TEMP2_CONFIG 0x4c
107
108/* temps 0-5 as numbered in VIA datasheet - see later for mapping to Linux
109** numbering
110*/
111#define ISTEMP(i, ch_config) ((i) == 0 ? 1 : \
112 ((ch_config) >> ((i)+1)) & 0x01)
113/* voltages 0-5 */
114#define ISVOLT(i, ch_config) ((i) == 5 ? 1 : \
115 !(((ch_config) >> ((i)+2)) & 0x01))
116
117#define DIV_FROM_REG(val) (1 << (val))
118
119/* NB The values returned here are NOT temperatures. The calibration curves
120** for the thermistor curves are board-specific and must go in the
121** sensors.conf file. Temperature sensors are actually ten bits, but the
122** VIA datasheet only considers the 8 MSBs obtained from the regtemp[]
123** register. The temperature value returned should have a magnitude of 3,
124** so we use the VIA scaling as the "true" scaling and use the remaining 2
125** LSBs as fractional precision.
126**
127** All the on-chip hardware temperature comparisons for the alarms are only
128** 8-bits wide, and compare against the 8 MSBs of the temperature. The bits
129** in the registers VT8231_REG_TEMP_LOW01 and VT8231_REG_TEMP_LOW25 are
130** ignored.
131*/
132
133/******** FAN RPM CONVERSIONS ********
134** This chip saturates back at 0, not at 255 like many the other chips.
135** So, 0 means 0 RPM
136*/
137static inline u8 FAN_TO_REG(long rpm, int div)
138{
139 if (rpm == 0)
140 return 0;
141 return SENSORS_LIMIT(1310720 / (rpm * div), 1, 255);
142}
143
144#define FAN_FROM_REG(val, div) ((val) == 0 ? 0 : 1310720 / ((val) * (div)))
145
146struct vt8231_data {
ec5e1a4b
RL		 147 unsigned short addr;
148 const char *name;
149
9a61bf63 150 struct mutex update_lock;
1beeffe4 151 struct device *hwmon_dev;
1de9e371
RL		 152 char valid; /* !=0 if following fields are valid */
153 unsigned long last_updated; /* In jiffies */
154
155 u8 in[6]; /* Register value */
156 u8 in_max[6]; /* Register value */
157 u8 in_min[6]; /* Register value */
158 u16 temp[6]; /* Register value 10 bit, right aligned */
159 u8 temp_max[6]; /* Register value */
160 u8 temp_min[6]; /* Register value */
161 u8 fan[2]; /* Register value */
162 u8 fan_min[2]; /* Register value */
163 u8 fan_div[2]; /* Register encoding, shifted right */
164 u16 alarms; /* Register encoding */
165 u8 uch_config;
166};
167
168static struct pci_dev *s_bridge;
ec5e1a4b 169static int vt8231_probe(struct platform_device *pdev);
d0546128 170static int __devexit vt8231_remove(struct platform_device *pdev);
1de9e371 171static struct vt8231_data *vt8231_update_device(struct device *dev);
ec5e1a4b 172static void vt8231_init_device(struct vt8231_data *data);
1de9e371 173
ec5e1a4b 174static inline int vt8231_read_value(struct vt8231_data *data, u8 reg)
1de9e371 175{
ec5e1a4b 176 return inb_p(data->addr + reg);
1de9e371
RL		 177}
178
ec5e1a4b 179static inline void vt8231_write_value(struct vt8231_data *data, u8 reg,
1de9e371
RL		 180 u8 value)
181{
ec5e1a4b 182 outb_p(value, data->addr + reg);
1de9e371
RL		 183}
184
185/* following are the sysfs callback functions */
186static ssize_t show_in(struct device *dev, struct device_attribute *attr,
187 char *buf)
188{
189 struct sensor_device_attribute *sensor_attr = to_sensor_dev_attr(attr);
190 int nr = sensor_attr->index;
191 struct vt8231_data *data = vt8231_update_device(dev);
192
193 return sprintf(buf, "%d\n", ((data->in[nr] - 3) * 10000) / 958);
194}
195
196static ssize_t show_in_min(struct device *dev, struct device_attribute *attr,
197 char *buf)
198{
199 struct sensor_device_attribute *sensor_attr = to_sensor_dev_attr(attr);
200 int nr = sensor_attr->index;
201 struct vt8231_data *data = vt8231_update_device(dev);
202
203 return sprintf(buf, "%d\n", ((data->in_min[nr] - 3) * 10000) / 958);
204}
205
206static ssize_t show_in_max(struct device *dev, struct device_attribute *attr,
207 char *buf)
208{
209 struct sensor_device_attribute *sensor_attr = to_sensor_dev_attr(attr);
210 int nr = sensor_attr->index;
211 struct vt8231_data *data = vt8231_update_device(dev);
212
213 return sprintf(buf, "%d\n", (((data->in_max[nr] - 3) * 10000) / 958));
214}
215
216static ssize_t set_in_min(struct device *dev, struct device_attribute *attr,
217 const char *buf, size_t count)
218{
219 struct sensor_device_attribute *sensor_attr = to_sensor_dev_attr(attr);
220 int nr = sensor_attr->index;
ec5e1a4b 221 struct vt8231_data *data = dev_get_drvdata(dev);
1de9e371
RL		 222 unsigned long val = simple_strtoul(buf, NULL, 10);
223
9a61bf63 224 mutex_lock(&data->update_lock);
1de9e371 225 data->in_min[nr] = SENSORS_LIMIT(((val * 958) / 10000) + 3, 0, 255);
ec5e1a4b 226 vt8231_write_value(data, regvoltmin[nr], data->in_min[nr]);
9a61bf63 227 mutex_unlock(&data->update_lock);
1de9e371
RL		 228 return count;
229}
230
231static ssize_t set_in_max(struct device *dev, struct device_attribute *attr,
232 const char *buf, size_t count)
233{
234 struct sensor_device_attribute *sensor_attr = to_sensor_dev_attr(attr);
235 int nr = sensor_attr->index;
ec5e1a4b 236 struct vt8231_data *data = dev_get_drvdata(dev);
1de9e371
RL		 237 unsigned long val = simple_strtoul(buf, NULL, 10);
238
9a61bf63 239 mutex_lock(&data->update_lock);
1de9e371 240 data->in_max[nr] = SENSORS_LIMIT(((val * 958) / 10000) + 3, 0, 255);
ec5e1a4b 241 vt8231_write_value(data, regvoltmax[nr], data->in_max[nr]);
9a61bf63 242 mutex_unlock(&data->update_lock);
1de9e371
RL		 243 return count;
244}
245
246/* Special case for input 5 as this has 3.3V scaling built into the chip */
247static ssize_t show_in5(struct device *dev, struct device_attribute *attr,
248 char *buf)
249{
250 struct vt8231_data *data = vt8231_update_device(dev);
251
252 return sprintf(buf, "%d\n",
253 (((data->in[5] - 3) * 10000 * 54) / (958 * 34)));
254}
255
256static ssize_t show_in5_min(struct device *dev, struct device_attribute *attr,
257 char *buf)
258{
259 struct vt8231_data *data = vt8231_update_device(dev);
260
261 return sprintf(buf, "%d\n",
262 (((data->in_min[5] - 3) * 10000 * 54) / (958 * 34)));
263}
264
265static ssize_t show_in5_max(struct device *dev, struct device_attribute *attr,
266 char *buf)
267{
268 struct vt8231_data *data = vt8231_update_device(dev);
269
270 return sprintf(buf, "%d\n",
271 (((data->in_max[5] - 3) * 10000 * 54) / (958 * 34)));
272}
273
274static ssize_t set_in5_min(struct device *dev, struct device_attribute *attr,
275 const char *buf, size_t count)
276{
ec5e1a4b 277 struct vt8231_data *data = dev_get_drvdata(dev);
1de9e371
RL		 278 unsigned long val = simple_strtoul(buf, NULL, 10);
279
9a61bf63 280 mutex_lock(&data->update_lock);
1de9e371
RL		 281 data->in_min[5] = SENSORS_LIMIT(((val * 958 * 34) / (10000 * 54)) + 3,
282 0, 255);
ec5e1a4b 283 vt8231_write_value(data, regvoltmin[5], data->in_min[5]);
9a61bf63 284 mutex_unlock(&data->update_lock);
1de9e371
RL		 285 return count;
286}
287
288static ssize_t set_in5_max(struct device *dev, struct device_attribute *attr,
289 const char *buf, size_t count)
290{
ec5e1a4b 291 struct vt8231_data *data = dev_get_drvdata(dev);
1de9e371
RL		 292 unsigned long val = simple_strtoul(buf, NULL, 10);
293
9a61bf63 294 mutex_lock(&data->update_lock);
1de9e371
RL		 295 data->in_max[5] = SENSORS_LIMIT(((val * 958 * 34) / (10000 * 54)) + 3,
296 0, 255);
ec5e1a4b 297 vt8231_write_value(data, regvoltmax[5], data->in_max[5]);
9a61bf63 298 mutex_unlock(&data->update_lock);
1de9e371
RL		 299 return count;
300}
301
302#define define_voltage_sysfs(offset) \
303static SENSOR_DEVICE_ATTR(in##offset##_input, S_IRUGO, \
304 show_in, NULL, offset); \
305static SENSOR_DEVICE_ATTR(in##offset##_min, S_IRUGO | S_IWUSR, \
306 show_in_min, set_in_min, offset); \
307static SENSOR_DEVICE_ATTR(in##offset##_max, S_IRUGO | S_IWUSR, \
308 show_in_max, set_in_max, offset)
309
310define_voltage_sysfs(0);
311define_voltage_sysfs(1);
312define_voltage_sysfs(2);
313define_voltage_sysfs(3);
314define_voltage_sysfs(4);
315
316static DEVICE_ATTR(in5_input, S_IRUGO, show_in5, NULL);
317static DEVICE_ATTR(in5_min, S_IRUGO | S_IWUSR, show_in5_min, set_in5_min);
318static DEVICE_ATTR(in5_max, S_IRUGO | S_IWUSR, show_in5_max, set_in5_max);
319
320/* Temperatures */
321static ssize_t show_temp0(struct device *dev, struct device_attribute *attr,
322 char *buf)
323{
324 struct vt8231_data *data = vt8231_update_device(dev);
325 return sprintf(buf, "%d\n", data->temp[0] * 250);
326}
327
328static ssize_t show_temp0_max(struct device *dev, struct device_attribute *attr,
329 char *buf)
330{
331 struct vt8231_data *data = vt8231_update_device(dev);
332 return sprintf(buf, "%d\n", data->temp_max[0] * 1000);
333}
334
335static ssize_t show_temp0_min(struct device *dev, struct device_attribute *attr,
336 char *buf)
337{
338 struct vt8231_data *data = vt8231_update_device(dev);
339 return sprintf(buf, "%d\n", data->temp_min[0] * 1000);
340}
341
342static ssize_t set_temp0_max(struct device *dev, struct device_attribute *attr,
343 const char *buf, size_t count)
344{
ec5e1a4b 345 struct vt8231_data *data = dev_get_drvdata(dev);
1de9e371
RL		 346 int val = simple_strtol(buf, NULL, 10);
347
9a61bf63 348 mutex_lock(&data->update_lock);
1de9e371 349 data->temp_max[0] = SENSORS_LIMIT((val + 500) / 1000, 0, 255);
ec5e1a4b 350 vt8231_write_value(data, regtempmax[0], data->temp_max[0]);
9a61bf63 351 mutex_unlock(&data->update_lock);
1de9e371
RL		 352 return count;
353}
354static ssize_t set_temp0_min(struct device *dev, struct device_attribute *attr,
355 const char *buf, size_t count)
356{
ec5e1a4b 357 struct vt8231_data *data = dev_get_drvdata(dev);
1de9e371
RL		 358 int val = simple_strtol(buf, NULL, 10);
359
9a61bf63 360 mutex_lock(&data->update_lock);
1de9e371 361 data->temp_min[0] = SENSORS_LIMIT((val + 500) / 1000, 0, 255);
ec5e1a4b 362 vt8231_write_value(data, regtempmin[0], data->temp_min[0]);
9a61bf63 363 mutex_unlock(&data->update_lock);
1de9e371
RL		 364 return count;
365}
366
367static ssize_t show_temp(struct device *dev, struct device_attribute *attr,
368 char *buf)
369{
370 struct sensor_device_attribute *sensor_attr = to_sensor_dev_attr(attr);
371 int nr = sensor_attr->index;
372 struct vt8231_data *data = vt8231_update_device(dev);
373 return sprintf(buf, "%d\n", TEMP_FROM_REG(data->temp[nr]));
374}
375
376static ssize_t show_temp_max(struct device *dev, struct device_attribute *attr,
377 char *buf)
378{
379 struct sensor_device_attribute *sensor_attr = to_sensor_dev_attr(attr);
380 int nr = sensor_attr->index;
381 struct vt8231_data *data = vt8231_update_device(dev);
382 return sprintf(buf, "%d\n", TEMP_MAXMIN_FROM_REG(data->temp_max[nr]));
383}
384
385static ssize_t show_temp_min(struct device *dev, struct device_attribute *attr,
386 char *buf)
387{
388 struct sensor_device_attribute *sensor_attr = to_sensor_dev_attr(attr);
389 int nr = sensor_attr->index;
390 struct vt8231_data *data = vt8231_update_device(dev);
391 return sprintf(buf, "%d\n", TEMP_MAXMIN_FROM_REG(data->temp_min[nr]));
392}
393
394static ssize_t set_temp_max(struct device *dev, struct device_attribute *attr,
395 const char *buf, size_t count)
396{
397 struct sensor_device_attribute *sensor_attr = to_sensor_dev_attr(attr);
398 int nr = sensor_attr->index;
ec5e1a4b 399 struct vt8231_data *data = dev_get_drvdata(dev);
1de9e371
RL		 400 int val = simple_strtol(buf, NULL, 10);
401
9a61bf63 402 mutex_lock(&data->update_lock);
1de9e371 403 data->temp_max[nr] = SENSORS_LIMIT(TEMP_MAXMIN_TO_REG(val), 0, 255);
ec5e1a4b 404 vt8231_write_value(data, regtempmax[nr], data->temp_max[nr]);
9a61bf63 405 mutex_unlock(&data->update_lock);
1de9e371
RL		 406 return count;
407}
408static ssize_t set_temp_min(struct device *dev, struct device_attribute *attr,
409 const char *buf, size_t count)
410{
411 struct sensor_device_attribute *sensor_attr = to_sensor_dev_attr(attr);
412 int nr = sensor_attr->index;
ec5e1a4b 413 struct vt8231_data *data = dev_get_drvdata(dev);
1de9e371
RL		 414 int val = simple_strtol(buf, NULL, 10);
415
9a61bf63 416 mutex_lock(&data->update_lock);
1de9e371 417 data->temp_min[nr] = SENSORS_LIMIT(TEMP_MAXMIN_TO_REG(val), 0, 255);
ec5e1a4b 418 vt8231_write_value(data, regtempmin[nr], data->temp_min[nr]);
9a61bf63 419 mutex_unlock(&data->update_lock);
1de9e371
RL		 420 return count;
421}
422
423/* Note that these map the Linux temperature sensor numbering (1-6) to the VIA
424** temperature sensor numbering (0-5)
425*/
426#define define_temperature_sysfs(offset) \
427static SENSOR_DEVICE_ATTR(temp##offset##_input, S_IRUGO, \
428 show_temp, NULL, offset - 1); \
429static SENSOR_DEVICE_ATTR(temp##offset##_max, S_IRUGO | S_IWUSR, \
430 show_temp_max, set_temp_max, offset - 1); \
e3efa5a7 431static SENSOR_DEVICE_ATTR(temp##offset##_max_hyst, S_IRUGO | S_IWUSR, \
1de9e371
RL		 432 show_temp_min, set_temp_min, offset - 1)
433
434static DEVICE_ATTR(temp1_input, S_IRUGO, show_temp0, NULL);
435static DEVICE_ATTR(temp1_max, S_IRUGO | S_IWUSR, show_temp0_max, set_temp0_max);
e3efa5a7 436static DEVICE_ATTR(temp1_max_hyst, S_IRUGO | S_IWUSR, show_temp0_min, set_temp0_min);
1de9e371
RL		 437
438define_temperature_sysfs(2);
439define_temperature_sysfs(3);
440define_temperature_sysfs(4);
441define_temperature_sysfs(5);
442define_temperature_sysfs(6);
443
1de9e371
RL		 444/* Fans */
445static ssize_t show_fan(struct device *dev, struct device_attribute *attr,
446 char *buf)
447{
448 struct sensor_device_attribute *sensor_attr = to_sensor_dev_attr(attr);
449 int nr = sensor_attr->index;
450 struct vt8231_data *data = vt8231_update_device(dev);
451 return sprintf(buf, "%d\n", FAN_FROM_REG(data->fan[nr],
452 DIV_FROM_REG(data->fan_div[nr])));
453}
454
455static ssize_t show_fan_min(struct device *dev, struct device_attribute *attr,
456 char *buf)
457{
458 struct sensor_device_attribute *sensor_attr = to_sensor_dev_attr(attr);
459 int nr = sensor_attr->index;
460 struct vt8231_data *data = vt8231_update_device(dev);
461 return sprintf(buf, "%d\n", FAN_FROM_REG(data->fan_min[nr],
462 DIV_FROM_REG(data->fan_div[nr])));
463}
464
465static ssize_t show_fan_div(struct device *dev, struct device_attribute *attr,
466 char *buf)
467{
468 struct sensor_device_attribute *sensor_attr = to_sensor_dev_attr(attr);
469 int nr = sensor_attr->index;
470 struct vt8231_data *data = vt8231_update_device(dev);
471 return sprintf(buf, "%d\n", DIV_FROM_REG(data->fan_div[nr]));
472}
473
474static ssize_t set_fan_min(struct device *dev, struct device_attribute *attr,
475 const char *buf, size_t count)
476{
477 struct sensor_device_attribute *sensor_attr = to_sensor_dev_attr(attr);
478 int nr = sensor_attr->index;
ec5e1a4b 479 struct vt8231_data *data = dev_get_drvdata(dev);
1de9e371
RL		 480 int val = simple_strtoul(buf, NULL, 10);
481
9a61bf63 482 mutex_lock(&data->update_lock);
1de9e371 483 data->fan_min[nr] = FAN_TO_REG(val, DIV_FROM_REG(data->fan_div[nr]));
ec5e1a4b 484 vt8231_write_value(data, VT8231_REG_FAN_MIN(nr), data->fan_min[nr]);
9a61bf63 485 mutex_unlock(&data->update_lock);
1de9e371
RL		 486 return count;
487}
488
489static ssize_t set_fan_div(struct device *dev, struct device_attribute *attr,
490 const char *buf, size_t count)
491{
ec5e1a4b 492 struct vt8231_data *data = dev_get_drvdata(dev);
1de9e371
RL		 493 struct sensor_device_attribute *sensor_attr = to_sensor_dev_attr(attr);
494 unsigned long val = simple_strtoul(buf, NULL, 10);
495 int nr = sensor_attr->index;
ec5e1a4b 496 int old = vt8231_read_value(data, VT8231_REG_FANDIV);
1de9e371
RL		 497 long min = FAN_FROM_REG(data->fan_min[nr],
498 DIV_FROM_REG(data->fan_div[nr]));
499
9a61bf63 500 mutex_lock(&data->update_lock);
1de9e371
RL		 501 switch (val) {
502 case 1: data->fan_div[nr] = 0; break;
503 case 2: data->fan_div[nr] = 1; break;
504 case 4: data->fan_div[nr] = 2; break;
505 case 8: data->fan_div[nr] = 3; break;
506 default:
b20ff13a 507 dev_err(dev, "fan_div value %ld not supported. "
1de9e371 508 "Choose one of 1, 2, 4 or 8!\n", val);
9a61bf63 509 mutex_unlock(&data->update_lock);
1de9e371
RL		 510 return -EINVAL;
511 }
512
513 /* Correct the fan minimum speed */
514 data->fan_min[nr] = FAN_TO_REG(min, DIV_FROM_REG(data->fan_div[nr]));
ec5e1a4b 515 vt8231_write_value(data, VT8231_REG_FAN_MIN(nr), data->fan_min[nr]);
1de9e371
RL		 516
517 old = (old & 0x0f) | (data->fan_div[1] << 6) | (data->fan_div[0] << 4);
ec5e1a4b 518 vt8231_write_value(data, VT8231_REG_FANDIV, old);
9a61bf63 519 mutex_unlock(&data->update_lock);
1de9e371
RL		 520 return count;
521}
522
523
524#define define_fan_sysfs(offset) \
525static SENSOR_DEVICE_ATTR(fan##offset##_input, S_IRUGO, \
526 show_fan, NULL, offset - 1); \
527static SENSOR_DEVICE_ATTR(fan##offset##_div, S_IRUGO | S_IWUSR, \
528 show_fan_div, set_fan_div, offset - 1); \
529static SENSOR_DEVICE_ATTR(fan##offset##_min, S_IRUGO | S_IWUSR, \
530 show_fan_min, set_fan_min, offset - 1)
531
532define_fan_sysfs(1);
533define_fan_sysfs(2);
534
535/* Alarms */
536static ssize_t show_alarms(struct device *dev, struct device_attribute *attr,
537 char *buf)
538{
539 struct vt8231_data *data = vt8231_update_device(dev);
540 return sprintf(buf, "%d\n", data->alarms);
541}
1de9e371
RL		 542static DEVICE_ATTR(alarms, S_IRUGO, show_alarms, NULL);
543
2d1374ca
JD		 544static ssize_t show_alarm(struct device *dev, struct device_attribute *attr,
545 char *buf)
546{
547 int bitnr = to_sensor_dev_attr(attr)->index;
548 struct vt8231_data *data = vt8231_update_device(dev);
549 return sprintf(buf, "%u\n", (data->alarms >> bitnr) & 1);
550}
551static SENSOR_DEVICE_ATTR(temp1_alarm, S_IRUGO, show_alarm, NULL, 4);
552static SENSOR_DEVICE_ATTR(temp2_alarm, S_IRUGO, show_alarm, NULL, 11);
553static SENSOR_DEVICE_ATTR(temp3_alarm, S_IRUGO, show_alarm, NULL, 0);
554static SENSOR_DEVICE_ATTR(temp4_alarm, S_IRUGO, show_alarm, NULL, 1);
555static SENSOR_DEVICE_ATTR(temp5_alarm, S_IRUGO, show_alarm, NULL, 3);
556static SENSOR_DEVICE_ATTR(temp6_alarm, S_IRUGO, show_alarm, NULL, 8);
557static SENSOR_DEVICE_ATTR(in0_alarm, S_IRUGO, show_alarm, NULL, 11);
558static SENSOR_DEVICE_ATTR(in1_alarm, S_IRUGO, show_alarm, NULL, 0);
559static SENSOR_DEVICE_ATTR(in2_alarm, S_IRUGO, show_alarm, NULL, 1);
560static SENSOR_DEVICE_ATTR(in3_alarm, S_IRUGO, show_alarm, NULL, 3);
561static SENSOR_DEVICE_ATTR(in4_alarm, S_IRUGO, show_alarm, NULL, 8);
562static SENSOR_DEVICE_ATTR(in5_alarm, S_IRUGO, show_alarm, NULL, 2);
563static SENSOR_DEVICE_ATTR(fan1_alarm, S_IRUGO, show_alarm, NULL, 6);
564static SENSOR_DEVICE_ATTR(fan2_alarm, S_IRUGO, show_alarm, NULL, 7);
565
ec5e1a4b
RL		 566static ssize_t show_name(struct device *dev, struct device_attribute
567 *devattr, char *buf)
568{
569 struct vt8231_data *data = dev_get_drvdata(dev);
570 return sprintf(buf, "%s\n", data->name);
571}
572static DEVICE_ATTR(name, S_IRUGO, show_name, NULL);
573
2d1374ca 574static struct attribute *vt8231_attributes_temps[6][5] = {
cbeeb5b7
RL		 575 {
576 &dev_attr_temp1_input.attr,
577 &dev_attr_temp1_max_hyst.attr,
578 &dev_attr_temp1_max.attr,
2d1374ca 579 &sensor_dev_attr_temp1_alarm.dev_attr.attr,
cbeeb5b7
RL		 580 NULL
581 }, {
582 &sensor_dev_attr_temp2_input.dev_attr.attr,
583 &sensor_dev_attr_temp2_max_hyst.dev_attr.attr,
584 &sensor_dev_attr_temp2_max.dev_attr.attr,
2d1374ca 585 &sensor_dev_attr_temp2_alarm.dev_attr.attr,
cbeeb5b7
RL		 586 NULL
587 }, {
588 &sensor_dev_attr_temp3_input.dev_attr.attr,
589 &sensor_dev_attr_temp3_max_hyst.dev_attr.attr,
590 &sensor_dev_attr_temp3_max.dev_attr.attr,
2d1374ca 591 &sensor_dev_attr_temp3_alarm.dev_attr.attr,
cbeeb5b7
RL		 592 NULL
593 }, {
594 &sensor_dev_attr_temp4_input.dev_attr.attr,
595 &sensor_dev_attr_temp4_max_hyst.dev_attr.attr,
596 &sensor_dev_attr_temp4_max.dev_attr.attr,
2d1374ca 597 &sensor_dev_attr_temp4_alarm.dev_attr.attr,
cbeeb5b7
RL		 598 NULL
599 }, {
600 &sensor_dev_attr_temp5_input.dev_attr.attr,
601 &sensor_dev_attr_temp5_max_hyst.dev_attr.attr,
602 &sensor_dev_attr_temp5_max.dev_attr.attr,
2d1374ca 603 &sensor_dev_attr_temp5_alarm.dev_attr.attr,
cbeeb5b7
RL		 604 NULL
605 }, {
606 &sensor_dev_attr_temp6_input.dev_attr.attr,
607 &sensor_dev_attr_temp6_max_hyst.dev_attr.attr,
608 &sensor_dev_attr_temp6_max.dev_attr.attr,
2d1374ca 609 &sensor_dev_attr_temp6_alarm.dev_attr.attr,
cbeeb5b7
RL		 610 NULL
611 }
612};
613
614static const struct attribute_group vt8231_group_temps[6] = {
615 { .attrs = vt8231_attributes_temps[0] },
616 { .attrs = vt8231_attributes_temps[1] },
617 { .attrs = vt8231_attributes_temps[2] },
618 { .attrs = vt8231_attributes_temps[3] },
619 { .attrs = vt8231_attributes_temps[4] },
620 { .attrs = vt8231_attributes_temps[5] },
621};
622
2d1374ca 623static struct attribute *vt8231_attributes_volts[6][5] = {
cbeeb5b7
RL		 624 {
625 &sensor_dev_attr_in0_input.dev_attr.attr,
626 &sensor_dev_attr_in0_min.dev_attr.attr,
627 &sensor_dev_attr_in0_max.dev_attr.attr,
2d1374ca 628 &sensor_dev_attr_in0_alarm.dev_attr.attr,
cbeeb5b7
RL		 629 NULL
630 }, {
631 &sensor_dev_attr_in1_input.dev_attr.attr,
632 &sensor_dev_attr_in1_min.dev_attr.attr,
633 &sensor_dev_attr_in1_max.dev_attr.attr,
2d1374ca 634 &sensor_dev_attr_in1_alarm.dev_attr.attr,
cbeeb5b7
RL		 635 NULL
636 }, {
637 &sensor_dev_attr_in2_input.dev_attr.attr,
638 &sensor_dev_attr_in2_min.dev_attr.attr,
639 &sensor_dev_attr_in2_max.dev_attr.attr,
2d1374ca 640 &sensor_dev_attr_in2_alarm.dev_attr.attr,
cbeeb5b7
RL		 641 NULL
642 }, {
643 &sensor_dev_attr_in3_input.dev_attr.attr,
644 &sensor_dev_attr_in3_min.dev_attr.attr,
645 &sensor_dev_attr_in3_max.dev_attr.attr,
2d1374ca 646 &sensor_dev_attr_in3_alarm.dev_attr.attr,
cbeeb5b7
RL		 647 NULL
648 }, {
649 &sensor_dev_attr_in4_input.dev_attr.attr,
650 &sensor_dev_attr_in4_min.dev_attr.attr,
651 &sensor_dev_attr_in4_max.dev_attr.attr,
2d1374ca 652 &sensor_dev_attr_in4_alarm.dev_attr.attr,
cbeeb5b7
RL		 653 NULL
654 }, {
655 &dev_attr_in5_input.attr,
656 &dev_attr_in5_min.attr,
657 &dev_attr_in5_max.attr,
2d1374ca 658 &sensor_dev_attr_in5_alarm.dev_attr.attr,
cbeeb5b7
RL		 659 NULL
660 }
661};
662
663static const struct attribute_group vt8231_group_volts[6] = {
664 { .attrs = vt8231_attributes_volts[0] },
665 { .attrs = vt8231_attributes_volts[1] },
666 { .attrs = vt8231_attributes_volts[2] },
667 { .attrs = vt8231_attributes_volts[3] },
668 { .attrs = vt8231_attributes_volts[4] },
669 { .attrs = vt8231_attributes_volts[5] },
670};
671
672static struct attribute *vt8231_attributes[] = {
673 &sensor_dev_attr_fan1_input.dev_attr.attr,
674 &sensor_dev_attr_fan2_input.dev_attr.attr,
675 &sensor_dev_attr_fan1_min.dev_attr.attr,
676 &sensor_dev_attr_fan2_min.dev_attr.attr,
677 &sensor_dev_attr_fan1_div.dev_attr.attr,
678 &sensor_dev_attr_fan2_div.dev_attr.attr,
2d1374ca
JD		 679 &sensor_dev_attr_fan1_alarm.dev_attr.attr,
680 &sensor_dev_attr_fan2_alarm.dev_attr.attr,
cbeeb5b7 681 &dev_attr_alarms.attr,
ec5e1a4b 682 &dev_attr_name.attr,
cbeeb5b7
RL		 683 NULL
684};
685
686static const struct attribute_group vt8231_group = {
687 .attrs = vt8231_attributes,
688};
689
ec5e1a4b 690static struct platform_driver vt8231_driver = {
cdaf7934 691 .driver = {
87218842 692 .owner = THIS_MODULE,
cdaf7934
LR		 693 .name = "vt8231",
694 },
ec5e1a4b
RL		 695 .probe = vt8231_probe,
696 .remove = __devexit_p(vt8231_remove),
1de9e371
RL		 697};
698
699static struct pci_device_id vt8231_pci_ids[] = {
700 { PCI_DEVICE(PCI_VENDOR_ID_VIA, PCI_DEVICE_ID_VIA_8231_4) },
701 { 0, }
702};
703
704MODULE_DEVICE_TABLE(pci, vt8231_pci_ids);
705
706static int __devinit vt8231_pci_probe(struct pci_dev *dev,
707 const struct pci_device_id *id);
708
709static struct pci_driver vt8231_pci_driver = {
710 .name = "vt8231",
711 .id_table = vt8231_pci_ids,
712 .probe = vt8231_pci_probe,
713};
714
a022fef5 715static int vt8231_probe(struct platform_device *pdev)
1de9e371 716{
ec5e1a4b 717 struct resource *res;
1de9e371
RL		 718 struct vt8231_data *data;
719 int err = 0, i;
1de9e371
RL		 720
721 /* Reserve the ISA region */
ec5e1a4b
RL		 722 res = platform_get_resource(pdev, IORESOURCE_IO, 0);
723 if (!request_region(res->start, VT8231_EXTENT,
724 vt8231_driver.driver.name)) {
725 dev_err(&pdev->dev, "Region 0x%lx-0x%lx already in use!\n",
726 (unsigned long)res->start, (unsigned long)res->end);
1de9e371
RL		 727 return -ENODEV;
728 }
729
730 if (!(data = kzalloc(sizeof(struct vt8231_data), GFP_KERNEL))) {
731 err = -ENOMEM;
732 goto exit_release;
733 }
734
ec5e1a4b
RL		 735 platform_set_drvdata(pdev, data);
736 data->addr = res->start;
737 data->name = "vt8231";
1de9e371 738
9a61bf63 739 mutex_init(&data->update_lock);
ec5e1a4b 740 vt8231_init_device(data);
1de9e371
RL		 741
742 /* Register sysfs hooks */
ec5e1a4b
RL		 743 if ((err = sysfs_create_group(&pdev->dev.kobj, &vt8231_group)))
744 goto exit_free;
1de9e371
RL		 745
746 /* Must update device information to find out the config field */
ec5e1a4b 747 data->uch_config = vt8231_read_value(data, VT8231_REG_UCH_CONFIG);
1de9e371 748
cbeeb5b7 749 for (i = 0; i < ARRAY_SIZE(vt8231_group_temps); i++) {
1de9e371 750 if (ISTEMP(i, data->uch_config)) {
ec5e1a4b 751 if ((err = sysfs_create_group(&pdev->dev.kobj,
cbeeb5b7
RL		 752 &vt8231_group_temps[i])))
753 goto exit_remove_files;
1de9e371
RL		 754 }
755 }
756
cbeeb5b7 757 for (i = 0; i < ARRAY_SIZE(vt8231_group_volts); i++) {
1de9e371 758 if (ISVOLT(i, data->uch_config)) {
ec5e1a4b 759 if ((err = sysfs_create_group(&pdev->dev.kobj,
cbeeb5b7
RL		 760 &vt8231_group_volts[i])))
761 goto exit_remove_files;
1de9e371
RL		 762 }
763 }
764
1beeffe4
TJ		 765 data->hwmon_dev = hwmon_device_register(&pdev->dev);
766 if (IS_ERR(data->hwmon_dev)) {
767 err = PTR_ERR(data->hwmon_dev);
cbeeb5b7
RL		 768 goto exit_remove_files;
769 }
1de9e371
RL		 770 return 0;
771
cbeeb5b7
RL		 772exit_remove_files:
773 for (i = 0; i < ARRAY_SIZE(vt8231_group_volts); i++)
ec5e1a4b 774 sysfs_remove_group(&pdev->dev.kobj, &vt8231_group_volts[i]);
cbeeb5b7
RL		 775
776 for (i = 0; i < ARRAY_SIZE(vt8231_group_temps); i++)
ec5e1a4b
RL		 777 sysfs_remove_group(&pdev->dev.kobj, &vt8231_group_temps[i]);
778
779 sysfs_remove_group(&pdev->dev.kobj, &vt8231_group);
cbeeb5b7 780
1de9e371 781exit_free:
04a6217d 782 platform_set_drvdata(pdev, NULL);
1de9e371 783 kfree(data);
ec5e1a4b 784
1de9e371 785exit_release:
ec5e1a4b 786 release_region(res->start, VT8231_EXTENT);
1de9e371
RL		 787 return err;
788}
789
d0546128 790static int __devexit vt8231_remove(struct platform_device *pdev)
1de9e371 791{
ec5e1a4b
RL		 792 struct vt8231_data *data = platform_get_drvdata(pdev);
793 int i;
1de9e371 794
1beeffe4 795 hwmon_device_unregister(data->hwmon_dev);
1de9e371 796
cbeeb5b7 797 for (i = 0; i < ARRAY_SIZE(vt8231_group_volts); i++)
ec5e1a4b 798 sysfs_remove_group(&pdev->dev.kobj, &vt8231_group_volts[i]);
cbeeb5b7
RL		 799
800 for (i = 0; i < ARRAY_SIZE(vt8231_group_temps); i++)
ec5e1a4b 801 sysfs_remove_group(&pdev->dev.kobj, &vt8231_group_temps[i]);
cbeeb5b7 802
ec5e1a4b 803 sysfs_remove_group(&pdev->dev.kobj, &vt8231_group);
cbeeb5b7 804
ec5e1a4b
RL		 805 release_region(data->addr, VT8231_EXTENT);
806 platform_set_drvdata(pdev, NULL);
1de9e371 807 kfree(data);
1de9e371
RL		 808 return 0;
809}
810
ec5e1a4b 811static void vt8231_init_device(struct vt8231_data *data)
1de9e371 812{
ec5e1a4b
RL		 813 vt8231_write_value(data, VT8231_REG_TEMP1_CONFIG, 0);
814 vt8231_write_value(data, VT8231_REG_TEMP2_CONFIG, 0);
1de9e371
RL		 815}
816
817static struct vt8231_data *vt8231_update_device(struct device *dev)
818{
ec5e1a4b 819 struct vt8231_data *data = dev_get_drvdata(dev);
1de9e371
RL		 820 int i;
821 u16 low;
822
9a61bf63 823 mutex_lock(&data->update_lock);
1de9e371
RL		 824
825 if (time_after(jiffies, data->last_updated + HZ + HZ / 2)
826 || !data->valid) {
827 for (i = 0; i < 6; i++) {
828 if (ISVOLT(i, data->uch_config)) {
ec5e1a4b 829 data->in[i] = vt8231_read_value(data,
1de9e371 830 regvolt[i]);
ec5e1a4b 831 data->in_min[i] = vt8231_read_value(data,
1de9e371 832 regvoltmin[i]);
ec5e1a4b 833 data->in_max[i] = vt8231_read_value(data,
1de9e371
RL		 834 regvoltmax[i]);
835 }
836 }
837 for (i = 0; i < 2; i++) {
ec5e1a4b 838 data->fan[i] = vt8231_read_value(data,
1de9e371 839 VT8231_REG_FAN(i));
ec5e1a4b 840 data->fan_min[i] = vt8231_read_value(data,
1de9e371
RL		 841 VT8231_REG_FAN_MIN(i));
842 }
843
ec5e1a4b 844 low = vt8231_read_value(data, VT8231_REG_TEMP_LOW01);
1de9e371 845 low = (low >> 6) | ((low & 0x30) >> 2)
ec5e1a4b 846 | (vt8231_read_value(data, VT8231_REG_TEMP_LOW25) << 4);
1de9e371
RL		 847 for (i = 0; i < 6; i++) {
848 if (ISTEMP(i, data->uch_config)) {
ec5e1a4b 849 data->temp[i] = (vt8231_read_value(data,
1de9e371
RL		 850 regtemp[i]) << 2)
851 | ((low >> (2 * i)) & 0x03);
ec5e1a4b 852 data->temp_max[i] = vt8231_read_value(data,
1de9e371 853 regtempmax[i]);
ec5e1a4b 854 data->temp_min[i] = vt8231_read_value(data,
1de9e371
RL		 855 regtempmin[i]);
856 }
857 }
858
ec5e1a4b 859 i = vt8231_read_value(data, VT8231_REG_FANDIV);
1de9e371
RL		 860 data->fan_div[0] = (i >> 4) & 0x03;
861 data->fan_div[1] = i >> 6;
ec5e1a4b
RL		 862 data->alarms = vt8231_read_value(data, VT8231_REG_ALARM1) |
863 (vt8231_read_value(data, VT8231_REG_ALARM2) << 8);
1de9e371
RL		 864
865 /* Set alarm flags correctly */
866 if (!data->fan[0] && data->fan_min[0]) {
867 data->alarms |= 0x40;
868 } else if (data->fan[0] && !data->fan_min[0]) {
869 data->alarms &= ~0x40;
870 }
871
872 if (!data->fan[1] && data->fan_min[1]) {
873 data->alarms |= 0x80;
874 } else if (data->fan[1] && !data->fan_min[1]) {
875 data->alarms &= ~0x80;
876 }
877
878 data->last_updated = jiffies;
879 data->valid = 1;
880 }
881
9a61bf63 882 mutex_unlock(&data->update_lock);
1de9e371
RL		 883
884 return data;
885}
886
ec5e1a4b
RL		 887static int __devinit vt8231_device_add(unsigned short address)
888{
889 struct resource res = {
890 .start = address,
891 .end = address + VT8231_EXTENT - 1,
892 .name = "vt8231",
893 .flags = IORESOURCE_IO,
894 };
895 int err;
896
897 pdev = platform_device_alloc("vt8231", address);
898 if (!pdev) {
899 err = -ENOMEM;
900 printk(KERN_ERR "vt8231: Device allocation failed\n");
901 goto exit;
902 }
903
904 err = platform_device_add_resources(pdev, &res, 1);
905 if (err) {
906 printk(KERN_ERR "vt8231: Device resource addition failed "
907 "(%d)\n", err);
908 goto exit_device_put;
909 }
910
911 err = platform_device_add(pdev);
912 if (err) {
913 printk(KERN_ERR "vt8231: Device addition failed (%d)\n",
914 err);
915 goto exit_device_put;
916 }
917
918 return 0;
919
920exit_device_put:
921 platform_device_put(pdev);
922exit:
923 return err;
924}
925
1de9e371
RL		 926static int __devinit vt8231_pci_probe(struct pci_dev *dev,
927 const struct pci_device_id *id)
928{
ec5e1a4b
RL		 929 u16 address, val;
930 if (force_addr) {
931 address = force_addr & 0xff00;
932 dev_warn(&dev->dev, "Forcing ISA address 0x%x\n",
933 address);
934
935 if (PCIBIOS_SUCCESSFUL !=
936 pci_write_config_word(dev, VT8231_BASE_REG, address | 1))
937 return -ENODEV;
938 }
1de9e371
RL		 939
940 if (PCIBIOS_SUCCESSFUL != pci_read_config_word(dev, VT8231_BASE_REG,
941 &val))
942 return -ENODEV;
943
ec5e1a4b
RL		 944 address = val & ~(VT8231_EXTENT - 1);
945 if (address == 0) {
1de9e371
RL		 946 dev_err(&dev->dev, "base address not set -\
947 upgrade BIOS or use force_addr=0xaddr\n");
948 return -ENODEV;
949 }
950
ec5e1a4b
RL		 951 if (PCIBIOS_SUCCESSFUL != pci_read_config_word(dev, VT8231_ENABLE_REG,
952 &val))
953 return -ENODEV;
1de9e371 954
ec5e1a4b
RL		 955 if (!(val & 0x0001)) {
956 dev_warn(&dev->dev, "enabling sensors\n");
957 if (PCIBIOS_SUCCESSFUL !=
958 pci_write_config_word(dev, VT8231_ENABLE_REG,
959 val | 0x0001))
960 return -ENODEV;
1de9e371
RL		 961 }
962
ec5e1a4b
RL		 963 if (platform_driver_register(&vt8231_driver))
964 goto exit;
965
966 /* Sets global pdev as a side effect */
967 if (vt8231_device_add(address))
968 goto exit_unregister;
969
1de9e371
RL		 970 /* Always return failure here. This is to allow other drivers to bind
971 * to this pci device. We don't really want to have control over the
972 * pci device, we only wanted to read as few register values from it.
973 */
ec5e1a4b
RL		 974
975 /* We do, however, mark ourselves as using the PCI device to stop it
976 getting unloaded. */
977 s_bridge = pci_dev_get(dev);
978 return -ENODEV;
979
980exit_unregister:
981 platform_driver_unregister(&vt8231_driver);
982exit:
1de9e371
RL		 983 return -ENODEV;
984}
985
986static int __init sm_vt8231_init(void)
987{
93b47684 988 return pci_register_driver(&vt8231_pci_driver);
1de9e371
RL		 989}
990
991static void __exit sm_vt8231_exit(void)
992{
993 pci_unregister_driver(&vt8231_pci_driver);
994 if (s_bridge != NULL) {
ec5e1a4b
RL		 995 platform_device_unregister(pdev);
996 platform_driver_unregister(&vt8231_driver);
1de9e371
RL		 997 pci_dev_put(s_bridge);
998 s_bridge = NULL;
999 }
1000}
1001
af865765 1002MODULE_AUTHOR("Roger Lucas <[email protected]>");
1de9e371
RL		 1003MODULE_DESCRIPTION("VT8231 sensors");
1004MODULE_LICENSE("GPL");
1005
1006module_init(sm_vt8231_init);
1007module_exit(sm_vt8231_exit);
Empty description
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