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ipv6: reallocate addrconf router for ipv6 address when lo device up
[linux/fpc-iii.git] / drivers / hwmon / sis5595.c
blob098489cefc57f1033c9c8ae7a4c42a8287c937b9
1 /*
2 * sis5595.c - Part of lm_sensors, Linux kernel modules
3 * for hardware monitoring
4 *
5 * Copyright (C) 1998 - 2001 Frodo Looijaard <frodol@dds.nl>,
6 * Kyösti Mälkki <kmalkki@cc.hut.fi>, and
7 * Mark D. Studebaker <mdsxyz123@yahoo.com>
8 * Ported to Linux 2.6 by Aurelien Jarno <aurelien@aurel32.net> with
9 * the help of Jean Delvare <khali@linux-fr.org>
10 *
11 * This program is free software; you can redistribute it and/or modify
12 * it under the terms of the GNU General Public License as published by
13 * the Free Software Foundation; either version 2 of the License, or
14 * (at your option) any later version.
15 *
16 * This program is distributed in the hope that it will be useful,
17 * but WITHOUT ANY WARRANTY; without even the implied warranty of
18 * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
19 * GNU General Public License for more details.
20 *
21 * You should have received a copy of the GNU General Public License
22 * along with this program; if not, write to the Free Software
23 * Foundation, Inc., 675 Mass Ave, Cambridge, MA 02139, USA.
24 */
25
26 /*
27 * SiS southbridge has a LM78-like chip integrated on the same IC.
28 * This driver is a customized copy of lm78.c
29 *
30 * Supports following revisions:
31 * Version PCI ID PCI Revision
32 * 1 1039/0008 AF or less
33 * 2 1039/0008 B0 or greater
34 *
35 * Note: these chips contain a 0008 device which is incompatible with the
36 * 5595. We recognize these by the presence of the listed
37 * "blacklist" PCI ID and refuse to load.
38 *
39 * NOT SUPPORTED PCI ID BLACKLIST PCI ID
40 * 540 0008 0540
41 * 550 0008 0550
42 * 5513 0008 5511
43 * 5581 0008 5597
44 * 5582 0008 5597
45 * 5597 0008 5597
46 * 5598 0008 5597/5598
47 * 630 0008 0630
48 * 645 0008 0645
49 * 730 0008 0730
50 * 735 0008 0735
51 */
52
53 #define pr_fmt(fmt) KBUILD_MODNAME ": " fmt
54
55 #include <linux/module.h>
56 #include <linux/slab.h>
57 #include <linux/ioport.h>
58 #include <linux/pci.h>
59 #include <linux/platform_device.h>
60 #include <linux/hwmon.h>
61 #include <linux/hwmon-sysfs.h>
62 #include <linux/err.h>
63 #include <linux/init.h>
64 #include <linux/jiffies.h>
65 #include <linux/mutex.h>
66 #include <linux/sysfs.h>
67 #include <linux/acpi.h>
68 #include <linux/io.h>
69
70
71 /*
72 * If force_addr is set to anything different from 0, we forcibly enable
73 * the device at the given address.
74 */
75 static u16 force_addr;
76 module_param(force_addr, ushort, 0);
77 MODULE_PARM_DESC(force_addr,
78 "Initialize the base address of the sensors");
79
80 static struct platform_device *pdev;
81
82 /* Many SIS5595 constants specified below */
83
84 /* Length of ISA address segment */
85 #define SIS5595_EXTENT 8
86 /* PCI Config Registers */
87 #define SIS5595_BASE_REG 0x68
88 #define SIS5595_PIN_REG 0x7A
89 #define SIS5595_ENABLE_REG 0x7B
90
91 /* Where are the ISA address/data registers relative to the base address */
92 #define SIS5595_ADDR_REG_OFFSET 5
93 #define SIS5595_DATA_REG_OFFSET 6
94
95 /* The SIS5595 registers */
96 #define SIS5595_REG_IN_MAX(nr) (0x2b + (nr) * 2)
97 #define SIS5595_REG_IN_MIN(nr) (0x2c + (nr) * 2)
98 #define SIS5595_REG_IN(nr) (0x20 + (nr))
99
100 #define SIS5595_REG_FAN_MIN(nr) (0x3b + (nr))
101 #define SIS5595_REG_FAN(nr) (0x28 + (nr))
102
103 /*
104 * On the first version of the chip, the temp registers are separate.
105 * On the second version,
106 * TEMP pin is shared with IN4, configured in PCI register 0x7A.
107 * The registers are the same as well.
108 * OVER and HYST are really MAX and MIN.
109 */
110
111 #define REV2MIN 0xb0
112 #define SIS5595_REG_TEMP (((data->revision) >= REV2MIN) ? \
113 SIS5595_REG_IN(4) : 0x27)
114 #define SIS5595_REG_TEMP_OVER (((data->revision) >= REV2MIN) ? \
115 SIS5595_REG_IN_MAX(4) : 0x39)
116 #define SIS5595_REG_TEMP_HYST (((data->revision) >= REV2MIN) ? \
117 SIS5595_REG_IN_MIN(4) : 0x3a)
118
119 #define SIS5595_REG_CONFIG 0x40
120 #define SIS5595_REG_ALARM1 0x41
121 #define SIS5595_REG_ALARM2 0x42
122 #define SIS5595_REG_FANDIV 0x47
123
124 /*
125 * Conversions. Limit checking is only done on the TO_REG
126 * variants.
127 */
128
129 /*
130 * IN: mV, (0V to 4.08V)
131 * REG: 16mV/bit
132 */
133 static inline u8 IN_TO_REG(unsigned long val)
134 {
135 unsigned long nval = SENSORS_LIMIT(val, 0, 4080);
136 return (nval + 8) / 16;
137 }
138 #define IN_FROM_REG(val) ((val) * 16)
139
140 static inline u8 FAN_TO_REG(long rpm, int div)
141 {
142 if (rpm <= 0)
143 return 255;
144 if (rpm > 1350000)
145 return 1;
146 return SENSORS_LIMIT((1350000 + rpm * div / 2) / (rpm * div), 1, 254);
147 }
148
149 static inline int FAN_FROM_REG(u8 val, int div)
150 {
151 return val == 0 ? -1 : val == 255 ? 0 : 1350000 / (val * div);
152 }
153
154 /*
155 * TEMP: mC (-54.12C to +157.53C)
156 * REG: 0.83C/bit + 52.12, two's complement
157 */
158 static inline int TEMP_FROM_REG(s8 val)
159 {
160 return val * 830 + 52120;
161 }
162 static inline s8 TEMP_TO_REG(int val)
163 {
164 int nval = SENSORS_LIMIT(val, -54120, 157530) ;
165 return nval < 0 ? (nval - 5212 - 415) / 830 : (nval - 5212 + 415) / 830;
166 }
167
168 /*
169 * FAN DIV: 1, 2, 4, or 8 (defaults to 2)
170 * REG: 0, 1, 2, or 3 (respectively) (defaults to 1)
171 */
172 static inline u8 DIV_TO_REG(int val)
173 {
174 return val == 8 ? 3 : val == 4 ? 2 : val == 1 ? 0 : 1;
175 }
176 #define DIV_FROM_REG(val) (1 << (val))
177
178 /*
179 * For each registered chip, we need to keep some data in memory.
180 * The structure is dynamically allocated.
181 */
182 struct sis5595_data {
183 unsigned short addr;
184 const char *name;
185 struct device *hwmon_dev;
186 struct mutex lock;
187
188 struct mutex update_lock;
189 char valid; /* !=0 if following fields are valid */
190 unsigned long last_updated; /* In jiffies */
191 char maxins; /* == 3 if temp enabled, otherwise == 4 */
192 u8 revision; /* Reg. value */
193
194 u8 in[5]; /* Register value */
195 u8 in_max[5]; /* Register value */
196 u8 in_min[5]; /* Register value */
197 u8 fan[2]; /* Register value */
198 u8 fan_min[2]; /* Register value */
199 s8 temp; /* Register value */
200 s8 temp_over; /* Register value */
201 s8 temp_hyst; /* Register value */
202 u8 fan_div[2]; /* Register encoding, shifted right */
203 u16 alarms; /* Register encoding, combined */
204 };
205
206 static struct pci_dev *s_bridge; /* pointer to the (only) sis5595 */
207
208 static int sis5595_probe(struct platform_device *pdev);
209 static int __devexit sis5595_remove(struct platform_device *pdev);
210
211 static int sis5595_read_value(struct sis5595_data *data, u8 reg);
212 static void sis5595_write_value(struct sis5595_data *data, u8 reg, u8 value);
213 static struct sis5595_data *sis5595_update_device(struct device *dev);
214 static void sis5595_init_device(struct sis5595_data *data);
215
216 static struct platform_driver sis5595_driver = {
217 .driver = {
218 .owner = THIS_MODULE,
219 .name = "sis5595",
220 },
221 .probe = sis5595_probe,
222 .remove = __devexit_p(sis5595_remove),
223 };
224
225 /* 4 Voltages */
226 static ssize_t show_in(struct device *dev, struct device_attribute *da,
227 char *buf)
228 {
229 struct sis5595_data *data = sis5595_update_device(dev);
230 struct sensor_device_attribute *attr = to_sensor_dev_attr(da);
231 int nr = attr->index;
232 return sprintf(buf, "%d\n", IN_FROM_REG(data->in[nr]));
233 }
234
235 static ssize_t show_in_min(struct device *dev, struct device_attribute *da,
236 char *buf)
237 {
238 struct sis5595_data *data = sis5595_update_device(dev);
239 struct sensor_device_attribute *attr = to_sensor_dev_attr(da);
240 int nr = attr->index;
241 return sprintf(buf, "%d\n", IN_FROM_REG(data->in_min[nr]));
242 }
243
244 static ssize_t show_in_max(struct device *dev, struct device_attribute *da,
245 char *buf)
246 {
247 struct sis5595_data *data = sis5595_update_device(dev);
248 struct sensor_device_attribute *attr = to_sensor_dev_attr(da);
249 int nr = attr->index;
250 return sprintf(buf, "%d\n", IN_FROM_REG(data->in_max[nr]));
251 }
252
253 static ssize_t set_in_min(struct device *dev, struct device_attribute *da,
254 const char *buf, size_t count)
255 {
256 struct sis5595_data *data = dev_get_drvdata(dev);
257 struct sensor_device_attribute *attr = to_sensor_dev_attr(da);
258 int nr = attr->index;
259 unsigned long val;
260 int err;
261
262 err = kstrtoul(buf, 10, &val);
263 if (err)
264 return err;
265
266 mutex_lock(&data->update_lock);
267 data->in_min[nr] = IN_TO_REG(val);
268 sis5595_write_value(data, SIS5595_REG_IN_MIN(nr), data->in_min[nr]);
269 mutex_unlock(&data->update_lock);
270 return count;
271 }
272
273 static ssize_t set_in_max(struct device *dev, struct device_attribute *da,
274 const char *buf, size_t count)
275 {
276 struct sis5595_data *data = dev_get_drvdata(dev);
277 struct sensor_device_attribute *attr = to_sensor_dev_attr(da);
278 int nr = attr->index;
279 unsigned long val;
280 int err;
281
282 err = kstrtoul(buf, 10, &val);
283 if (err)
284 return err;
285
286 mutex_lock(&data->update_lock);
287 data->in_max[nr] = IN_TO_REG(val);
288 sis5595_write_value(data, SIS5595_REG_IN_MAX(nr), data->in_max[nr]);
289 mutex_unlock(&data->update_lock);
290 return count;
291 }
292
293 #define show_in_offset(offset) \
294 static SENSOR_DEVICE_ATTR(in##offset##_input, S_IRUGO, \
295 show_in, NULL, offset); \
296 static SENSOR_DEVICE_ATTR(in##offset##_min, S_IRUGO | S_IWUSR, \
297 show_in_min, set_in_min, offset); \
298 static SENSOR_DEVICE_ATTR(in##offset##_max, S_IRUGO | S_IWUSR, \
299 show_in_max, set_in_max, offset);
300
301 show_in_offset(0);
302 show_in_offset(1);
303 show_in_offset(2);
304 show_in_offset(3);
305 show_in_offset(4);
306
307 /* Temperature */
308 static ssize_t show_temp(struct device *dev, struct device_attribute *attr,
309 char *buf)
310 {
311 struct sis5595_data *data = sis5595_update_device(dev);
312 return sprintf(buf, "%d\n", TEMP_FROM_REG(data->temp));
313 }
314
315 static ssize_t show_temp_over(struct device *dev, struct device_attribute *attr,
316 char *buf)
317 {
318 struct sis5595_data *data = sis5595_update_device(dev);
319 return sprintf(buf, "%d\n", TEMP_FROM_REG(data->temp_over));
320 }
321
322 static ssize_t set_temp_over(struct device *dev, struct device_attribute *attr,
323 const char *buf, size_t count)
324 {
325 struct sis5595_data *data = dev_get_drvdata(dev);
326 long val;
327 int err;
328
329 err = kstrtol(buf, 10, &val);
330 if (err)
331 return err;
332
333 mutex_lock(&data->update_lock);
334 data->temp_over = TEMP_TO_REG(val);
335 sis5595_write_value(data, SIS5595_REG_TEMP_OVER, data->temp_over);
336 mutex_unlock(&data->update_lock);
337 return count;
338 }
339
340 static ssize_t show_temp_hyst(struct device *dev, struct device_attribute *attr,
341 char *buf)
342 {
343 struct sis5595_data *data = sis5595_update_device(dev);
344 return sprintf(buf, "%d\n", TEMP_FROM_REG(data->temp_hyst));
345 }
346
347 static ssize_t set_temp_hyst(struct device *dev, struct device_attribute *attr,
348 const char *buf, size_t count)
349 {
350 struct sis5595_data *data = dev_get_drvdata(dev);
351 long val;
352 int err;
353
354 err = kstrtol(buf, 10, &val);
355 if (err)
356 return err;
357
358 mutex_lock(&data->update_lock);
359 data->temp_hyst = TEMP_TO_REG(val);
360 sis5595_write_value(data, SIS5595_REG_TEMP_HYST, data->temp_hyst);
361 mutex_unlock(&data->update_lock);
362 return count;
363 }
364
365 static DEVICE_ATTR(temp1_input, S_IRUGO, show_temp, NULL);
366 static DEVICE_ATTR(temp1_max, S_IRUGO | S_IWUSR,
367 show_temp_over, set_temp_over);
368 static DEVICE_ATTR(temp1_max_hyst, S_IRUGO | S_IWUSR,
369 show_temp_hyst, set_temp_hyst);
370
371 /* 2 Fans */
372 static ssize_t show_fan(struct device *dev, struct device_attribute *da,
373 char *buf)
374 {
375 struct sis5595_data *data = sis5595_update_device(dev);
376 struct sensor_device_attribute *attr = to_sensor_dev_attr(da);
377 int nr = attr->index;
378 return sprintf(buf, "%d\n", FAN_FROM_REG(data->fan[nr],
379 DIV_FROM_REG(data->fan_div[nr])));
380 }
381
382 static ssize_t show_fan_min(struct device *dev, struct device_attribute *da,
383 char *buf)
384 {
385 struct sis5595_data *data = sis5595_update_device(dev);
386 struct sensor_device_attribute *attr = to_sensor_dev_attr(da);
387 int nr = attr->index;
388 return sprintf(buf, "%d\n", FAN_FROM_REG(data->fan_min[nr],
389 DIV_FROM_REG(data->fan_div[nr])));
390 }
391
392 static ssize_t set_fan_min(struct device *dev, struct device_attribute *da,
393 const char *buf, size_t count)
394 {
395 struct sis5595_data *data = dev_get_drvdata(dev);
396 struct sensor_device_attribute *attr = to_sensor_dev_attr(da);
397 int nr = attr->index;
398 unsigned long val;
399 int err;
400
401 err = kstrtoul(buf, 10, &val);
402 if (err)
403 return err;
404
405 mutex_lock(&data->update_lock);
406 data->fan_min[nr] = FAN_TO_REG(val, DIV_FROM_REG(data->fan_div[nr]));
407 sis5595_write_value(data, SIS5595_REG_FAN_MIN(nr), data->fan_min[nr]);
408 mutex_unlock(&data->update_lock);
409 return count;
410 }
411
412 static ssize_t show_fan_div(struct device *dev, struct device_attribute *da,
413 char *buf)
414 {
415 struct sis5595_data *data = sis5595_update_device(dev);
416 struct sensor_device_attribute *attr = to_sensor_dev_attr(da);
417 int nr = attr->index;
418 return sprintf(buf, "%d\n", DIV_FROM_REG(data->fan_div[nr]));
419 }
420
421 /*
422 * Note: we save and restore the fan minimum here, because its value is
423 * determined in part by the fan divisor. This follows the principle of
424 * least surprise; the user doesn't expect the fan minimum to change just
425 * because the divisor changed.
426 */
427 static ssize_t set_fan_div(struct device *dev, struct device_attribute *da,
428 const char *buf, size_t count)
429 {
430 struct sis5595_data *data = dev_get_drvdata(dev);
431 struct sensor_device_attribute *attr = to_sensor_dev_attr(da);
432 int nr = attr->index;
433 unsigned long min;
434 int reg;
435 unsigned long val;
436 int err;
437
438 err = kstrtoul(buf, 10, &val);
439 if (err)
440 return err;
441
442 mutex_lock(&data->update_lock);
443 min = FAN_FROM_REG(data->fan_min[nr],
444 DIV_FROM_REG(data->fan_div[nr]));
445 reg = sis5595_read_value(data, SIS5595_REG_FANDIV);
446
447 switch (val) {
448 case 1:
449 data->fan_div[nr] = 0;
450 break;
451 case 2:
452 data->fan_div[nr] = 1;
453 break;
454 case 4:
455 data->fan_div[nr] = 2;
456 break;
457 case 8:
458 data->fan_div[nr] = 3;
459 break;
460 default:
461 dev_err(dev, "fan_div value %ld not "
462 "supported. Choose one of 1, 2, 4 or 8!\n", val);
463 mutex_unlock(&data->update_lock);
464 return -EINVAL;
465 }
466
467 switch (nr) {
468 case 0:
469 reg = (reg & 0xcf) | (data->fan_div[nr] << 4);
470 break;
471 case 1:
472 reg = (reg & 0x3f) | (data->fan_div[nr] << 6);
473 break;
474 }
475 sis5595_write_value(data, SIS5595_REG_FANDIV, reg);
476 data->fan_min[nr] =
477 FAN_TO_REG(min, DIV_FROM_REG(data->fan_div[nr]));
478 sis5595_write_value(data, SIS5595_REG_FAN_MIN(nr), data->fan_min[nr]);
479 mutex_unlock(&data->update_lock);
480 return count;
481 }
482
483 #define show_fan_offset(offset) \
484 static SENSOR_DEVICE_ATTR(fan##offset##_input, S_IRUGO, \
485 show_fan, NULL, offset - 1); \
486 static SENSOR_DEVICE_ATTR(fan##offset##_min, S_IRUGO | S_IWUSR, \
487 show_fan_min, set_fan_min, offset - 1); \
488 static SENSOR_DEVICE_ATTR(fan##offset##_div, S_IRUGO | S_IWUSR, \
489 show_fan_div, set_fan_div, offset - 1);
490
491 show_fan_offset(1);
492 show_fan_offset(2);
493
494 /* Alarms */
495 static ssize_t show_alarms(struct device *dev, struct device_attribute *attr,
496 char *buf)
497 {
498 struct sis5595_data *data = sis5595_update_device(dev);
499 return sprintf(buf, "%d\n", data->alarms);
500 }
501 static DEVICE_ATTR(alarms, S_IRUGO, show_alarms, NULL);
502
503 static ssize_t show_alarm(struct device *dev, struct device_attribute *da,
504 char *buf)
505 {
506 struct sis5595_data *data = sis5595_update_device(dev);
507 int nr = to_sensor_dev_attr(da)->index;
508 return sprintf(buf, "%u\n", (data->alarms >> nr) & 1);
509 }
510 static SENSOR_DEVICE_ATTR(in0_alarm, S_IRUGO, show_alarm, NULL, 0);
511 static SENSOR_DEVICE_ATTR(in1_alarm, S_IRUGO, show_alarm, NULL, 1);
512 static SENSOR_DEVICE_ATTR(in2_alarm, S_IRUGO, show_alarm, NULL, 2);
513 static SENSOR_DEVICE_ATTR(in3_alarm, S_IRUGO, show_alarm, NULL, 3);
514 static SENSOR_DEVICE_ATTR(in4_alarm, S_IRUGO, show_alarm, NULL, 15);
515 static SENSOR_DEVICE_ATTR(fan1_alarm, S_IRUGO, show_alarm, NULL, 6);
516 static SENSOR_DEVICE_ATTR(fan2_alarm, S_IRUGO, show_alarm, NULL, 7);
517 static SENSOR_DEVICE_ATTR(temp1_alarm, S_IRUGO, show_alarm, NULL, 15);
518
519 static ssize_t show_name(struct device *dev, struct device_attribute *attr,
520 char *buf)
521 {
522 struct sis5595_data *data = dev_get_drvdata(dev);
523 return sprintf(buf, "%s\n", data->name);
524 }
525 static DEVICE_ATTR(name, S_IRUGO, show_name, NULL);
526
527 static struct attribute *sis5595_attributes[] = {
528 &sensor_dev_attr_in0_input.dev_attr.attr,
529 &sensor_dev_attr_in0_min.dev_attr.attr,
530 &sensor_dev_attr_in0_max.dev_attr.attr,
531 &sensor_dev_attr_in0_alarm.dev_attr.attr,
532 &sensor_dev_attr_in1_input.dev_attr.attr,
533 &sensor_dev_attr_in1_min.dev_attr.attr,
534 &sensor_dev_attr_in1_max.dev_attr.attr,
535 &sensor_dev_attr_in1_alarm.dev_attr.attr,
536 &sensor_dev_attr_in2_input.dev_attr.attr,
537 &sensor_dev_attr_in2_min.dev_attr.attr,
538 &sensor_dev_attr_in2_max.dev_attr.attr,
539 &sensor_dev_attr_in2_alarm.dev_attr.attr,
540 &sensor_dev_attr_in3_input.dev_attr.attr,
541 &sensor_dev_attr_in3_min.dev_attr.attr,
542 &sensor_dev_attr_in3_max.dev_attr.attr,
543 &sensor_dev_attr_in3_alarm.dev_attr.attr,
544
545 &sensor_dev_attr_fan1_input.dev_attr.attr,
546 &sensor_dev_attr_fan1_min.dev_attr.attr,
547 &sensor_dev_attr_fan1_div.dev_attr.attr,
548 &sensor_dev_attr_fan1_alarm.dev_attr.attr,
549 &sensor_dev_attr_fan2_input.dev_attr.attr,
550 &sensor_dev_attr_fan2_min.dev_attr.attr,
551 &sensor_dev_attr_fan2_div.dev_attr.attr,
552 &sensor_dev_attr_fan2_alarm.dev_attr.attr,
553
554 &dev_attr_alarms.attr,
555 &dev_attr_name.attr,
556 NULL
557 };
558
559 static const struct attribute_group sis5595_group = {
560 .attrs = sis5595_attributes,
561 };
562
563 static struct attribute *sis5595_attributes_in4[] = {
564 &sensor_dev_attr_in4_input.dev_attr.attr,
565 &sensor_dev_attr_in4_min.dev_attr.attr,
566 &sensor_dev_attr_in4_max.dev_attr.attr,
567 &sensor_dev_attr_in4_alarm.dev_attr.attr,
568 NULL
569 };
570
571 static const struct attribute_group sis5595_group_in4 = {
572 .attrs = sis5595_attributes_in4,
573 };
574
575 static struct attribute *sis5595_attributes_temp1[] = {
576 &dev_attr_temp1_input.attr,
577 &dev_attr_temp1_max.attr,
578 &dev_attr_temp1_max_hyst.attr,
579 &sensor_dev_attr_temp1_alarm.dev_attr.attr,
580 NULL
581 };
582
583 static const struct attribute_group sis5595_group_temp1 = {
584 .attrs = sis5595_attributes_temp1,
585 };
586
587 /* This is called when the module is loaded */
588 static int __devinit sis5595_probe(struct platform_device *pdev)
589 {
590 int err = 0;
591 int i;
592 struct sis5595_data *data;
593 struct resource *res;
594 char val;
595
596 /* Reserve the ISA region */
597 res = platform_get_resource(pdev, IORESOURCE_IO, 0);
598 if (!request_region(res->start, SIS5595_EXTENT,
599 sis5595_driver.driver.name)) {
600 err = -EBUSY;
601 goto exit;
602 }
603
604 data = kzalloc(sizeof(struct sis5595_data), GFP_KERNEL);
605 if (!data) {
606 err = -ENOMEM;
607 goto exit_release;
608 }
609
610 mutex_init(&data->lock);
611 mutex_init(&data->update_lock);
612 data->addr = res->start;
613 data->name = "sis5595";
614 platform_set_drvdata(pdev, data);
615
616 /*
617 * Check revision and pin registers to determine whether 4 or 5 voltages
618 */
619 data->revision = s_bridge->revision;
620 /* 4 voltages, 1 temp */
621 data->maxins = 3;
622 if (data->revision >= REV2MIN) {
623 pci_read_config_byte(s_bridge, SIS5595_PIN_REG, &val);
624 if (!(val & 0x80))
625 /* 5 voltages, no temps */
626 data->maxins = 4;
627 }
628
629 /* Initialize the SIS5595 chip */
630 sis5595_init_device(data);
631
632 /* A few vars need to be filled upon startup */
633 for (i = 0; i < 2; i++) {
634 data->fan_min[i] = sis5595_read_value(data,
635 SIS5595_REG_FAN_MIN(i));
636 }
637
638 /* Register sysfs hooks */
639 err = sysfs_create_group(&pdev->dev.kobj, &sis5595_group);
640 if (err)
641 goto exit_free;
642 if (data->maxins == 4) {
643 err = sysfs_create_group(&pdev->dev.kobj, &sis5595_group_in4);
644 if (err)
645 goto exit_remove_files;
646 } else {
647 err = sysfs_create_group(&pdev->dev.kobj, &sis5595_group_temp1);
648 if (err)
649 goto exit_remove_files;
650 }
651
652 data->hwmon_dev = hwmon_device_register(&pdev->dev);
653 if (IS_ERR(data->hwmon_dev)) {
654 err = PTR_ERR(data->hwmon_dev);
655 goto exit_remove_files;
656 }
657
658 return 0;
659
660 exit_remove_files:
661 sysfs_remove_group(&pdev->dev.kobj, &sis5595_group);
662 sysfs_remove_group(&pdev->dev.kobj, &sis5595_group_in4);
663 sysfs_remove_group(&pdev->dev.kobj, &sis5595_group_temp1);
664 exit_free:
665 kfree(data);
666 exit_release:
667 release_region(res->start, SIS5595_EXTENT);
668 exit:
669 return err;
670 }
671
672 static int __devexit sis5595_remove(struct platform_device *pdev)
673 {
674 struct sis5595_data *data = platform_get_drvdata(pdev);
675
676 hwmon_device_unregister(data->hwmon_dev);
677 sysfs_remove_group(&pdev->dev.kobj, &sis5595_group);
678 sysfs_remove_group(&pdev->dev.kobj, &sis5595_group_in4);
679 sysfs_remove_group(&pdev->dev.kobj, &sis5595_group_temp1);
680
681 release_region(data->addr, SIS5595_EXTENT);
682 platform_set_drvdata(pdev, NULL);
683 kfree(data);
684
685 return 0;
686 }
687
688
689 /* ISA access must be locked explicitly. */
690 static int sis5595_read_value(struct sis5595_data *data, u8 reg)
691 {
692 int res;
693
694 mutex_lock(&data->lock);
695 outb_p(reg, data->addr + SIS5595_ADDR_REG_OFFSET);
696 res = inb_p(data->addr + SIS5595_DATA_REG_OFFSET);
697 mutex_unlock(&data->lock);
698 return res;
699 }
700
701 static void sis5595_write_value(struct sis5595_data *data, u8 reg, u8 value)
702 {
703 mutex_lock(&data->lock);
704 outb_p(reg, data->addr + SIS5595_ADDR_REG_OFFSET);
705 outb_p(value, data->addr + SIS5595_DATA_REG_OFFSET);
706 mutex_unlock(&data->lock);
707 }
708
709 /* Called when we have found a new SIS5595. */
710 static void __devinit sis5595_init_device(struct sis5595_data *data)
711 {
712 u8 config = sis5595_read_value(data, SIS5595_REG_CONFIG);
713 if (!(config & 0x01))
714 sis5595_write_value(data, SIS5595_REG_CONFIG,
715 (config & 0xf7) | 0x01);
716 }
717
718 static struct sis5595_data *sis5595_update_device(struct device *dev)
719 {
720 struct sis5595_data *data = dev_get_drvdata(dev);
721 int i;
722
723 mutex_lock(&data->update_lock);
724
725 if (time_after(jiffies, data->last_updated + HZ + HZ / 2)
726 || !data->valid) {
727
728 for (i = 0; i <= data->maxins; i++) {
729 data->in[i] =
730 sis5595_read_value(data, SIS5595_REG_IN(i));
731 data->in_min[i] =
732 sis5595_read_value(data,
733 SIS5595_REG_IN_MIN(i));
734 data->in_max[i] =
735 sis5595_read_value(data,
736 SIS5595_REG_IN_MAX(i));
737 }
738 for (i = 0; i < 2; i++) {
739 data->fan[i] =
740 sis5595_read_value(data, SIS5595_REG_FAN(i));
741 data->fan_min[i] =
742 sis5595_read_value(data,
743 SIS5595_REG_FAN_MIN(i));
744 }
745 if (data->maxins == 3) {
746 data->temp =
747 sis5595_read_value(data, SIS5595_REG_TEMP);
748 data->temp_over =
749 sis5595_read_value(data, SIS5595_REG_TEMP_OVER);
750 data->temp_hyst =
751 sis5595_read_value(data, SIS5595_REG_TEMP_HYST);
752 }
753 i = sis5595_read_value(data, SIS5595_REG_FANDIV);
754 data->fan_div[0] = (i >> 4) & 0x03;
755 data->fan_div[1] = i >> 6;
756 data->alarms =
757 sis5595_read_value(data, SIS5595_REG_ALARM1) |
758 (sis5595_read_value(data, SIS5595_REG_ALARM2) << 8);
759 data->last_updated = jiffies;
760 data->valid = 1;
761 }
762
763 mutex_unlock(&data->update_lock);
764
765 return data;
766 }
767
768 static DEFINE_PCI_DEVICE_TABLE(sis5595_pci_ids) = {
769 { PCI_DEVICE(PCI_VENDOR_ID_SI, PCI_DEVICE_ID_SI_503) },
770 { 0, }
771 };
772
773 MODULE_DEVICE_TABLE(pci, sis5595_pci_ids);
774
775 static int blacklist[] __devinitdata = {
776 PCI_DEVICE_ID_SI_540,
777 PCI_DEVICE_ID_SI_550,
778 PCI_DEVICE_ID_SI_630,
779 PCI_DEVICE_ID_SI_645,
780 PCI_DEVICE_ID_SI_730,
781 PCI_DEVICE_ID_SI_735,
782 PCI_DEVICE_ID_SI_5511, /*
783 * 5513 chip has the 0008 device but
784 * that ID shows up in other chips so we
785 * use the 5511 ID for recognition
786 */
787 PCI_DEVICE_ID_SI_5597,
788 PCI_DEVICE_ID_SI_5598,
789 0 };
790
791 static int __devinit sis5595_device_add(unsigned short address)
792 {
793 struct resource res = {
794 .start = address,
795 .end = address + SIS5595_EXTENT - 1,
796 .name = "sis5595",
797 .flags = IORESOURCE_IO,
798 };
799 int err;
800
801 err = acpi_check_resource_conflict(&res);
802 if (err)
803 goto exit;
804
805 pdev = platform_device_alloc("sis5595", address);
806 if (!pdev) {
807 err = -ENOMEM;
808 pr_err("Device allocation failed\n");
809 goto exit;
810 }
811
812 err = platform_device_add_resources(pdev, &res, 1);
813 if (err) {
814 pr_err("Device resource addition failed (%d)\n", err);
815 goto exit_device_put;
816 }
817
818 err = platform_device_add(pdev);
819 if (err) {
820 pr_err("Device addition failed (%d)\n", err);
821 goto exit_device_put;
822 }
823
824 return 0;
825
826 exit_device_put:
827 platform_device_put(pdev);
828 exit:
829 return err;
830 }
831
832 static int __devinit sis5595_pci_probe(struct pci_dev *dev,
833 const struct pci_device_id *id)
834 {
835 u16 address;
836 u8 enable;
837 int *i;
838
839 for (i = blacklist; *i != 0; i++) {
840 struct pci_dev *d;
841 d = pci_get_device(PCI_VENDOR_ID_SI, *i, NULL);
842 if (d) {
843 dev_err(&d->dev,
844 "Looked for SIS5595 but found unsupported device %.4x\n",
845 *i);
846 pci_dev_put(d);
847 return -ENODEV;
848 }
849 }
850
851 force_addr &= ~(SIS5595_EXTENT - 1);
852 if (force_addr) {
853 dev_warn(&dev->dev, "Forcing ISA address 0x%x\n", force_addr);
854 pci_write_config_word(dev, SIS5595_BASE_REG, force_addr);
855 }
856
857 if (PCIBIOS_SUCCESSFUL !=
858 pci_read_config_word(dev, SIS5595_BASE_REG, &address)) {
859 dev_err(&dev->dev, "Failed to read ISA address\n");
860 return -ENODEV;
861 }
862
863 address &= ~(SIS5595_EXTENT - 1);
864 if (!address) {
865 dev_err(&dev->dev,
866 "Base address not set - upgrade BIOS or use force_addr=0xaddr\n");
867 return -ENODEV;
868 }
869 if (force_addr && address != force_addr) {
870 /* doesn't work for some chips? */
871 dev_err(&dev->dev, "Failed to force ISA address\n");
872 return -ENODEV;
873 }
874
875 if (PCIBIOS_SUCCESSFUL !=
876 pci_read_config_byte(dev, SIS5595_ENABLE_REG, &enable)) {
877 dev_err(&dev->dev, "Failed to read enable register\n");
878 return -ENODEV;
879 }
880 if (!(enable & 0x80)) {
881 if ((PCIBIOS_SUCCESSFUL !=
882 pci_write_config_byte(dev, SIS5595_ENABLE_REG,
883 enable | 0x80))
884 || (PCIBIOS_SUCCESSFUL !=
885 pci_read_config_byte(dev, SIS5595_ENABLE_REG, &enable))
886 || (!(enable & 0x80))) {
887 /* doesn't work for some chips! */
888 dev_err(&dev->dev, "Failed to enable HWM device\n");
889 return -ENODEV;
890 }
891 }
892
893 if (platform_driver_register(&sis5595_driver)) {
894 dev_dbg(&dev->dev, "Failed to register sis5595 driver\n");
895 goto exit;
896 }
897
898 s_bridge = pci_dev_get(dev);
899 /* Sets global pdev as a side effect */
900 if (sis5595_device_add(address))
901 goto exit_unregister;
902
903 /*
904 * Always return failure here. This is to allow other drivers to bind
905 * to this pci device. We don't really want to have control over the
906 * pci device, we only wanted to read as few register values from it.
907 */
908 return -ENODEV;
909
910 exit_unregister:
911 pci_dev_put(dev);
912 platform_driver_unregister(&sis5595_driver);
913 exit:
914 return -ENODEV;
915 }
916
917 static struct pci_driver sis5595_pci_driver = {
918 .name = "sis5595",
919 .id_table = sis5595_pci_ids,
920 .probe = sis5595_pci_probe,
921 };
922
923 static int __init sm_sis5595_init(void)
924 {
925 return pci_register_driver(&sis5595_pci_driver);
926 }
927
928 static void __exit sm_sis5595_exit(void)
929 {
930 pci_unregister_driver(&sis5595_pci_driver);
931 if (s_bridge != NULL) {
932 platform_device_unregister(pdev);
933 platform_driver_unregister(&sis5595_driver);
934 pci_dev_put(s_bridge);
935 s_bridge = NULL;
936 }
937 }
938
939 MODULE_AUTHOR("Aurelien Jarno <aurelien@aurel32.net>");
940 MODULE_DESCRIPTION("SiS 5595 Sensor device");
941 MODULE_LICENSE("GPL");
942
943 module_init(sm_sis5595_init);
944 module_exit(sm_sis5595_exit);
Linux with added FPC-III support