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PM / sleep: Asynchronous threads for suspend_noirq
[linux/fpc-iii.git] / drivers / hwmon / sis5595.c
blob3532026e25dafbf1006bff72559f6e0eba00070e
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 <jdelvare@suse.de>
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 = clamp_val(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 clamp_val((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 = clamp_val(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 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 = 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,
462 "fan_div value %ld not supported. Choose one of 1, 2, 4 or 8!\n",
463 val);
464 mutex_unlock(&data->update_lock);
465 return -EINVAL;
466 }
467
468 switch (nr) {
469 case 0:
470 reg = (reg & 0xcf) | (data->fan_div[nr] << 4);
471 break;
472 case 1:
473 reg = (reg & 0x3f) | (data->fan_div[nr] << 6);
474 break;
475 }
476 sis5595_write_value(data, SIS5595_REG_FANDIV, reg);
477 data->fan_min[nr] =
478 FAN_TO_REG(min, DIV_FROM_REG(data->fan_div[nr]));
479 sis5595_write_value(data, SIS5595_REG_FAN_MIN(nr), data->fan_min[nr]);
480 mutex_unlock(&data->update_lock);
481 return count;
482 }
483
484 #define show_fan_offset(offset) \
485 static SENSOR_DEVICE_ATTR(fan##offset##_input, S_IRUGO, \
486 show_fan, NULL, offset - 1); \
487 static SENSOR_DEVICE_ATTR(fan##offset##_min, S_IRUGO | S_IWUSR, \
488 show_fan_min, set_fan_min, offset - 1); \
489 static SENSOR_DEVICE_ATTR(fan##offset##_div, S_IRUGO | S_IWUSR, \
490 show_fan_div, set_fan_div, offset - 1);
491
492 show_fan_offset(1);
493 show_fan_offset(2);
494
495 /* Alarms */
496 static ssize_t show_alarms(struct device *dev, struct device_attribute *attr,
497 char *buf)
498 {
499 struct sis5595_data *data = sis5595_update_device(dev);
500 return sprintf(buf, "%d\n", data->alarms);
501 }
502 static DEVICE_ATTR(alarms, S_IRUGO, show_alarms, NULL);
503
504 static ssize_t show_alarm(struct device *dev, struct device_attribute *da,
505 char *buf)
506 {
507 struct sis5595_data *data = sis5595_update_device(dev);
508 int nr = to_sensor_dev_attr(da)->index;
509 return sprintf(buf, "%u\n", (data->alarms >> nr) & 1);
510 }
511 static SENSOR_DEVICE_ATTR(in0_alarm, S_IRUGO, show_alarm, NULL, 0);
512 static SENSOR_DEVICE_ATTR(in1_alarm, S_IRUGO, show_alarm, NULL, 1);
513 static SENSOR_DEVICE_ATTR(in2_alarm, S_IRUGO, show_alarm, NULL, 2);
514 static SENSOR_DEVICE_ATTR(in3_alarm, S_IRUGO, show_alarm, NULL, 3);
515 static SENSOR_DEVICE_ATTR(in4_alarm, S_IRUGO, show_alarm, NULL, 15);
516 static SENSOR_DEVICE_ATTR(fan1_alarm, S_IRUGO, show_alarm, NULL, 6);
517 static SENSOR_DEVICE_ATTR(fan2_alarm, S_IRUGO, show_alarm, NULL, 7);
518 static SENSOR_DEVICE_ATTR(temp1_alarm, S_IRUGO, show_alarm, NULL, 15);
519
520 static ssize_t show_name(struct device *dev, struct device_attribute *attr,
521 char *buf)
522 {
523 struct sis5595_data *data = dev_get_drvdata(dev);
524 return sprintf(buf, "%s\n", data->name);
525 }
526 static DEVICE_ATTR(name, S_IRUGO, show_name, NULL);
527
528 static struct attribute *sis5595_attributes[] = {
529 &sensor_dev_attr_in0_input.dev_attr.attr,
530 &sensor_dev_attr_in0_min.dev_attr.attr,
531 &sensor_dev_attr_in0_max.dev_attr.attr,
532 &sensor_dev_attr_in0_alarm.dev_attr.attr,
533 &sensor_dev_attr_in1_input.dev_attr.attr,
534 &sensor_dev_attr_in1_min.dev_attr.attr,
535 &sensor_dev_attr_in1_max.dev_attr.attr,
536 &sensor_dev_attr_in1_alarm.dev_attr.attr,
537 &sensor_dev_attr_in2_input.dev_attr.attr,
538 &sensor_dev_attr_in2_min.dev_attr.attr,
539 &sensor_dev_attr_in2_max.dev_attr.attr,
540 &sensor_dev_attr_in2_alarm.dev_attr.attr,
541 &sensor_dev_attr_in3_input.dev_attr.attr,
542 &sensor_dev_attr_in3_min.dev_attr.attr,
543 &sensor_dev_attr_in3_max.dev_attr.attr,
544 &sensor_dev_attr_in3_alarm.dev_attr.attr,
545
546 &sensor_dev_attr_fan1_input.dev_attr.attr,
547 &sensor_dev_attr_fan1_min.dev_attr.attr,
548 &sensor_dev_attr_fan1_div.dev_attr.attr,
549 &sensor_dev_attr_fan1_alarm.dev_attr.attr,
550 &sensor_dev_attr_fan2_input.dev_attr.attr,
551 &sensor_dev_attr_fan2_min.dev_attr.attr,
552 &sensor_dev_attr_fan2_div.dev_attr.attr,
553 &sensor_dev_attr_fan2_alarm.dev_attr.attr,
554
555 &dev_attr_alarms.attr,
556 &dev_attr_name.attr,
557 NULL
558 };
559
560 static const struct attribute_group sis5595_group = {
561 .attrs = sis5595_attributes,
562 };
563
564 static struct attribute *sis5595_attributes_in4[] = {
565 &sensor_dev_attr_in4_input.dev_attr.attr,
566 &sensor_dev_attr_in4_min.dev_attr.attr,
567 &sensor_dev_attr_in4_max.dev_attr.attr,
568 &sensor_dev_attr_in4_alarm.dev_attr.attr,
569 NULL
570 };
571
572 static const struct attribute_group sis5595_group_in4 = {
573 .attrs = sis5595_attributes_in4,
574 };
575
576 static struct attribute *sis5595_attributes_temp1[] = {
577 &dev_attr_temp1_input.attr,
578 &dev_attr_temp1_max.attr,
579 &dev_attr_temp1_max_hyst.attr,
580 &sensor_dev_attr_temp1_alarm.dev_attr.attr,
581 NULL
582 };
583
584 static const struct attribute_group sis5595_group_temp1 = {
585 .attrs = sis5595_attributes_temp1,
586 };
587
588 /* This is called when the module is loaded */
589 static int sis5595_probe(struct platform_device *pdev)
590 {
591 int err = 0;
592 int i;
593 struct sis5595_data *data;
594 struct resource *res;
595 char val;
596
597 /* Reserve the ISA region */
598 res = platform_get_resource(pdev, IORESOURCE_IO, 0);
599 if (!devm_request_region(&pdev->dev, res->start, SIS5595_EXTENT,
600 sis5595_driver.driver.name))
601 return -EBUSY;
602
603 data = devm_kzalloc(&pdev->dev, sizeof(struct sis5595_data),
604 GFP_KERNEL);
605 if (!data)
606 return -ENOMEM;
607
608 mutex_init(&data->lock);
609 mutex_init(&data->update_lock);
610 data->addr = res->start;
611 data->name = "sis5595";
612 platform_set_drvdata(pdev, data);
613
614 /*
615 * Check revision and pin registers to determine whether 4 or 5 voltages
616 */
617 data->revision = s_bridge->revision;
618 /* 4 voltages, 1 temp */
619 data->maxins = 3;
620 if (data->revision >= REV2MIN) {
621 pci_read_config_byte(s_bridge, SIS5595_PIN_REG, &val);
622 if (!(val & 0x80))
623 /* 5 voltages, no temps */
624 data->maxins = 4;
625 }
626
627 /* Initialize the SIS5595 chip */
628 sis5595_init_device(data);
629
630 /* A few vars need to be filled upon startup */
631 for (i = 0; i < 2; i++) {
632 data->fan_min[i] = sis5595_read_value(data,
633 SIS5595_REG_FAN_MIN(i));
634 }
635
636 /* Register sysfs hooks */
637 err = sysfs_create_group(&pdev->dev.kobj, &sis5595_group);
638 if (err)
639 return err;
640 if (data->maxins == 4) {
641 err = sysfs_create_group(&pdev->dev.kobj, &sis5595_group_in4);
642 if (err)
643 goto exit_remove_files;
644 } else {
645 err = sysfs_create_group(&pdev->dev.kobj, &sis5595_group_temp1);
646 if (err)
647 goto exit_remove_files;
648 }
649
650 data->hwmon_dev = hwmon_device_register(&pdev->dev);
651 if (IS_ERR(data->hwmon_dev)) {
652 err = PTR_ERR(data->hwmon_dev);
653 goto exit_remove_files;
654 }
655
656 return 0;
657
658 exit_remove_files:
659 sysfs_remove_group(&pdev->dev.kobj, &sis5595_group);
660 sysfs_remove_group(&pdev->dev.kobj, &sis5595_group_in4);
661 sysfs_remove_group(&pdev->dev.kobj, &sis5595_group_temp1);
662 return err;
663 }
664
665 static int sis5595_remove(struct platform_device *pdev)
666 {
667 struct sis5595_data *data = platform_get_drvdata(pdev);
668
669 hwmon_device_unregister(data->hwmon_dev);
670 sysfs_remove_group(&pdev->dev.kobj, &sis5595_group);
671 sysfs_remove_group(&pdev->dev.kobj, &sis5595_group_in4);
672 sysfs_remove_group(&pdev->dev.kobj, &sis5595_group_temp1);
673
674 return 0;
675 }
676
677
678 /* ISA access must be locked explicitly. */
679 static int sis5595_read_value(struct sis5595_data *data, u8 reg)
680 {
681 int res;
682
683 mutex_lock(&data->lock);
684 outb_p(reg, data->addr + SIS5595_ADDR_REG_OFFSET);
685 res = inb_p(data->addr + SIS5595_DATA_REG_OFFSET);
686 mutex_unlock(&data->lock);
687 return res;
688 }
689
690 static void sis5595_write_value(struct sis5595_data *data, u8 reg, u8 value)
691 {
692 mutex_lock(&data->lock);
693 outb_p(reg, data->addr + SIS5595_ADDR_REG_OFFSET);
694 outb_p(value, data->addr + SIS5595_DATA_REG_OFFSET);
695 mutex_unlock(&data->lock);
696 }
697
698 /* Called when we have found a new SIS5595. */
699 static void sis5595_init_device(struct sis5595_data *data)
700 {
701 u8 config = sis5595_read_value(data, SIS5595_REG_CONFIG);
702 if (!(config & 0x01))
703 sis5595_write_value(data, SIS5595_REG_CONFIG,
704 (config & 0xf7) | 0x01);
705 }
706
707 static struct sis5595_data *sis5595_update_device(struct device *dev)
708 {
709 struct sis5595_data *data = dev_get_drvdata(dev);
710 int i;
711
712 mutex_lock(&data->update_lock);
713
714 if (time_after(jiffies, data->last_updated + HZ + HZ / 2)
715 || !data->valid) {
716
717 for (i = 0; i <= data->maxins; i++) {
718 data->in[i] =
719 sis5595_read_value(data, SIS5595_REG_IN(i));
720 data->in_min[i] =
721 sis5595_read_value(data,
722 SIS5595_REG_IN_MIN(i));
723 data->in_max[i] =
724 sis5595_read_value(data,
725 SIS5595_REG_IN_MAX(i));
726 }
727 for (i = 0; i < 2; i++) {
728 data->fan[i] =
729 sis5595_read_value(data, SIS5595_REG_FAN(i));
730 data->fan_min[i] =
731 sis5595_read_value(data,
732 SIS5595_REG_FAN_MIN(i));
733 }
734 if (data->maxins == 3) {
735 data->temp =
736 sis5595_read_value(data, SIS5595_REG_TEMP);
737 data->temp_over =
738 sis5595_read_value(data, SIS5595_REG_TEMP_OVER);
739 data->temp_hyst =
740 sis5595_read_value(data, SIS5595_REG_TEMP_HYST);
741 }
742 i = sis5595_read_value(data, SIS5595_REG_FANDIV);
743 data->fan_div[0] = (i >> 4) & 0x03;
744 data->fan_div[1] = i >> 6;
745 data->alarms =
746 sis5595_read_value(data, SIS5595_REG_ALARM1) |
747 (sis5595_read_value(data, SIS5595_REG_ALARM2) << 8);
748 data->last_updated = jiffies;
749 data->valid = 1;
750 }
751
752 mutex_unlock(&data->update_lock);
753
754 return data;
755 }
756
757 static const struct pci_device_id sis5595_pci_ids[] = {
758 { PCI_DEVICE(PCI_VENDOR_ID_SI, PCI_DEVICE_ID_SI_503) },
759 { 0, }
760 };
761
762 MODULE_DEVICE_TABLE(pci, sis5595_pci_ids);
763
764 static int blacklist[] = {
765 PCI_DEVICE_ID_SI_540,
766 PCI_DEVICE_ID_SI_550,
767 PCI_DEVICE_ID_SI_630,
768 PCI_DEVICE_ID_SI_645,
769 PCI_DEVICE_ID_SI_730,
770 PCI_DEVICE_ID_SI_735,
771 PCI_DEVICE_ID_SI_5511, /*
772 * 5513 chip has the 0008 device but
773 * that ID shows up in other chips so we
774 * use the 5511 ID for recognition
775 */
776 PCI_DEVICE_ID_SI_5597,
777 PCI_DEVICE_ID_SI_5598,
778 0 };
779
780 static int sis5595_device_add(unsigned short address)
781 {
782 struct resource res = {
783 .start = address,
784 .end = address + SIS5595_EXTENT - 1,
785 .name = "sis5595",
786 .flags = IORESOURCE_IO,
787 };
788 int err;
789
790 err = acpi_check_resource_conflict(&res);
791 if (err)
792 goto exit;
793
794 pdev = platform_device_alloc("sis5595", address);
795 if (!pdev) {
796 err = -ENOMEM;
797 pr_err("Device allocation failed\n");
798 goto exit;
799 }
800
801 err = platform_device_add_resources(pdev, &res, 1);
802 if (err) {
803 pr_err("Device resource addition failed (%d)\n", err);
804 goto exit_device_put;
805 }
806
807 err = platform_device_add(pdev);
808 if (err) {
809 pr_err("Device addition failed (%d)\n", err);
810 goto exit_device_put;
811 }
812
813 return 0;
814
815 exit_device_put:
816 platform_device_put(pdev);
817 exit:
818 return err;
819 }
820
821 static int sis5595_pci_probe(struct pci_dev *dev,
822 const struct pci_device_id *id)
823 {
824 u16 address;
825 u8 enable;
826 int *i;
827
828 for (i = blacklist; *i != 0; i++) {
829 struct pci_dev *d;
830 d = pci_get_device(PCI_VENDOR_ID_SI, *i, NULL);
831 if (d) {
832 dev_err(&d->dev,
833 "Looked for SIS5595 but found unsupported device %.4x\n",
834 *i);
835 pci_dev_put(d);
836 return -ENODEV;
837 }
838 }
839
840 force_addr &= ~(SIS5595_EXTENT - 1);
841 if (force_addr) {
842 dev_warn(&dev->dev, "Forcing ISA address 0x%x\n", force_addr);
843 pci_write_config_word(dev, SIS5595_BASE_REG, force_addr);
844 }
845
846 if (PCIBIOS_SUCCESSFUL !=
847 pci_read_config_word(dev, SIS5595_BASE_REG, &address)) {
848 dev_err(&dev->dev, "Failed to read ISA address\n");
849 return -ENODEV;
850 }
851
852 address &= ~(SIS5595_EXTENT - 1);
853 if (!address) {
854 dev_err(&dev->dev,
855 "Base address not set - upgrade BIOS or use force_addr=0xaddr\n");
856 return -ENODEV;
857 }
858 if (force_addr && address != force_addr) {
859 /* doesn't work for some chips? */
860 dev_err(&dev->dev, "Failed to force ISA address\n");
861 return -ENODEV;
862 }
863
864 if (PCIBIOS_SUCCESSFUL !=
865 pci_read_config_byte(dev, SIS5595_ENABLE_REG, &enable)) {
866 dev_err(&dev->dev, "Failed to read enable register\n");
867 return -ENODEV;
868 }
869 if (!(enable & 0x80)) {
870 if ((PCIBIOS_SUCCESSFUL !=
871 pci_write_config_byte(dev, SIS5595_ENABLE_REG,
872 enable | 0x80))
873 || (PCIBIOS_SUCCESSFUL !=
874 pci_read_config_byte(dev, SIS5595_ENABLE_REG, &enable))
875 || (!(enable & 0x80))) {
876 /* doesn't work for some chips! */
877 dev_err(&dev->dev, "Failed to enable HWM device\n");
878 return -ENODEV;
879 }
880 }
881
882 if (platform_driver_register(&sis5595_driver)) {
883 dev_dbg(&dev->dev, "Failed to register sis5595 driver\n");
884 goto exit;
885 }
886
887 s_bridge = pci_dev_get(dev);
888 /* Sets global pdev as a side effect */
889 if (sis5595_device_add(address))
890 goto exit_unregister;
891
892 /*
893 * Always return failure here. This is to allow other drivers to bind
894 * to this pci device. We don't really want to have control over the
895 * pci device, we only wanted to read as few register values from it.
896 */
897 return -ENODEV;
898
899 exit_unregister:
900 pci_dev_put(dev);
901 platform_driver_unregister(&sis5595_driver);
902 exit:
903 return -ENODEV;
904 }
905
906 static struct pci_driver sis5595_pci_driver = {
907 .name = "sis5595",
908 .id_table = sis5595_pci_ids,
909 .probe = sis5595_pci_probe,
910 };
911
912 static int __init sm_sis5595_init(void)
913 {
914 return pci_register_driver(&sis5595_pci_driver);
915 }
916
917 static void __exit sm_sis5595_exit(void)
918 {
919 pci_unregister_driver(&sis5595_pci_driver);
920 if (s_bridge != NULL) {
921 platform_device_unregister(pdev);
922 platform_driver_unregister(&sis5595_driver);
923 pci_dev_put(s_bridge);
924 s_bridge = NULL;
925 }
926 }
927
928 MODULE_AUTHOR("Aurelien Jarno <aurelien@aurel32.net>");
929 MODULE_DESCRIPTION("SiS 5595 Sensor device");
930 MODULE_LICENSE("GPL");
931
932 module_init(sm_sis5595_init);
933 module_exit(sm_sis5595_exit);
Linux with added FPC-III support