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mm: use kcalloc() instead of kzalloc() to allocate array
[linux/fpc-iii.git] / drivers / hwmon / sis5595.c
blob6c4d8eb9b7ca5414a2d7a9f8af94e45b638e0f9d
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 return SENSORS_LIMIT((1350000 + rpm * div / 2) / (rpm * div), 1, 254);
145 }
146
147 static inline int FAN_FROM_REG(u8 val, int div)
148 {
149 return val == 0 ? -1 : val == 255 ? 0 : 1350000 / (val * div);
150 }
151
152 /*
153 * TEMP: mC (-54.12C to +157.53C)
154 * REG: 0.83C/bit + 52.12, two's complement
155 */
156 static inline int TEMP_FROM_REG(s8 val)
157 {
158 return val * 830 + 52120;
159 }
160 static inline s8 TEMP_TO_REG(int val)
161 {
162 int nval = SENSORS_LIMIT(val, -54120, 157530) ;
163 return nval < 0 ? (nval - 5212 - 415) / 830 : (nval - 5212 + 415) / 830;
164 }
165
166 /*
167 * FAN DIV: 1, 2, 4, or 8 (defaults to 2)
168 * REG: 0, 1, 2, or 3 (respectively) (defaults to 1)
169 */
170 static inline u8 DIV_TO_REG(int val)
171 {
172 return val == 8 ? 3 : val == 4 ? 2 : val == 1 ? 0 : 1;
173 }
174 #define DIV_FROM_REG(val) (1 << (val))
175
176 /*
177 * For each registered chip, we need to keep some data in memory.
178 * The structure is dynamically allocated.
179 */
180 struct sis5595_data {
181 unsigned short addr;
182 const char *name;
183 struct device *hwmon_dev;
184 struct mutex lock;
185
186 struct mutex update_lock;
187 char valid; /* !=0 if following fields are valid */
188 unsigned long last_updated; /* In jiffies */
189 char maxins; /* == 3 if temp enabled, otherwise == 4 */
190 u8 revision; /* Reg. value */
191
192 u8 in[5]; /* Register value */
193 u8 in_max[5]; /* Register value */
194 u8 in_min[5]; /* Register value */
195 u8 fan[2]; /* Register value */
196 u8 fan_min[2]; /* Register value */
197 s8 temp; /* Register value */
198 s8 temp_over; /* Register value */
199 s8 temp_hyst; /* Register value */
200 u8 fan_div[2]; /* Register encoding, shifted right */
201 u16 alarms; /* Register encoding, combined */
202 };
203
204 static struct pci_dev *s_bridge; /* pointer to the (only) sis5595 */
205
206 static int sis5595_probe(struct platform_device *pdev);
207 static int __devexit sis5595_remove(struct platform_device *pdev);
208
209 static int sis5595_read_value(struct sis5595_data *data, u8 reg);
210 static void sis5595_write_value(struct sis5595_data *data, u8 reg, u8 value);
211 static struct sis5595_data *sis5595_update_device(struct device *dev);
212 static void sis5595_init_device(struct sis5595_data *data);
213
214 static struct platform_driver sis5595_driver = {
215 .driver = {
216 .owner = THIS_MODULE,
217 .name = "sis5595",
218 },
219 .probe = sis5595_probe,
220 .remove = __devexit_p(sis5595_remove),
221 };
222
223 /* 4 Voltages */
224 static ssize_t show_in(struct device *dev, struct device_attribute *da,
225 char *buf)
226 {
227 struct sis5595_data *data = sis5595_update_device(dev);
228 struct sensor_device_attribute *attr = to_sensor_dev_attr(da);
229 int nr = attr->index;
230 return sprintf(buf, "%d\n", IN_FROM_REG(data->in[nr]));
231 }
232
233 static ssize_t show_in_min(struct device *dev, struct device_attribute *da,
234 char *buf)
235 {
236 struct sis5595_data *data = sis5595_update_device(dev);
237 struct sensor_device_attribute *attr = to_sensor_dev_attr(da);
238 int nr = attr->index;
239 return sprintf(buf, "%d\n", IN_FROM_REG(data->in_min[nr]));
240 }
241
242 static ssize_t show_in_max(struct device *dev, struct device_attribute *da,
243 char *buf)
244 {
245 struct sis5595_data *data = sis5595_update_device(dev);
246 struct sensor_device_attribute *attr = to_sensor_dev_attr(da);
247 int nr = attr->index;
248 return sprintf(buf, "%d\n", IN_FROM_REG(data->in_max[nr]));
249 }
250
251 static ssize_t set_in_min(struct device *dev, struct device_attribute *da,
252 const char *buf, size_t count)
253 {
254 struct sis5595_data *data = dev_get_drvdata(dev);
255 struct sensor_device_attribute *attr = to_sensor_dev_attr(da);
256 int nr = attr->index;
257 unsigned long val;
258 int err;
259
260 err = kstrtoul(buf, 10, &val);
261 if (err)
262 return err;
263
264 mutex_lock(&data->update_lock);
265 data->in_min[nr] = IN_TO_REG(val);
266 sis5595_write_value(data, SIS5595_REG_IN_MIN(nr), data->in_min[nr]);
267 mutex_unlock(&data->update_lock);
268 return count;
269 }
270
271 static ssize_t set_in_max(struct device *dev, struct device_attribute *da,
272 const char *buf, size_t count)
273 {
274 struct sis5595_data *data = dev_get_drvdata(dev);
275 struct sensor_device_attribute *attr = to_sensor_dev_attr(da);
276 int nr = attr->index;
277 unsigned long val;
278 int err;
279
280 err = kstrtoul(buf, 10, &val);
281 if (err)
282 return err;
283
284 mutex_lock(&data->update_lock);
285 data->in_max[nr] = IN_TO_REG(val);
286 sis5595_write_value(data, SIS5595_REG_IN_MAX(nr), data->in_max[nr]);
287 mutex_unlock(&data->update_lock);
288 return count;
289 }
290
291 #define show_in_offset(offset) \
292 static SENSOR_DEVICE_ATTR(in##offset##_input, S_IRUGO, \
293 show_in, NULL, offset); \
294 static SENSOR_DEVICE_ATTR(in##offset##_min, S_IRUGO | S_IWUSR, \
295 show_in_min, set_in_min, offset); \
296 static SENSOR_DEVICE_ATTR(in##offset##_max, S_IRUGO | S_IWUSR, \
297 show_in_max, set_in_max, offset);
298
299 show_in_offset(0);
300 show_in_offset(1);
301 show_in_offset(2);
302 show_in_offset(3);
303 show_in_offset(4);
304
305 /* Temperature */
306 static ssize_t show_temp(struct device *dev, struct device_attribute *attr,
307 char *buf)
308 {
309 struct sis5595_data *data = sis5595_update_device(dev);
310 return sprintf(buf, "%d\n", TEMP_FROM_REG(data->temp));
311 }
312
313 static ssize_t show_temp_over(struct device *dev, struct device_attribute *attr,
314 char *buf)
315 {
316 struct sis5595_data *data = sis5595_update_device(dev);
317 return sprintf(buf, "%d\n", TEMP_FROM_REG(data->temp_over));
318 }
319
320 static ssize_t set_temp_over(struct device *dev, struct device_attribute *attr,
321 const char *buf, size_t count)
322 {
323 struct sis5595_data *data = dev_get_drvdata(dev);
324 long val;
325 int err;
326
327 err = kstrtol(buf, 10, &val);
328 if (err)
329 return err;
330
331 mutex_lock(&data->update_lock);
332 data->temp_over = TEMP_TO_REG(val);
333 sis5595_write_value(data, SIS5595_REG_TEMP_OVER, data->temp_over);
334 mutex_unlock(&data->update_lock);
335 return count;
336 }
337
338 static ssize_t show_temp_hyst(struct device *dev, struct device_attribute *attr,
339 char *buf)
340 {
341 struct sis5595_data *data = sis5595_update_device(dev);
342 return sprintf(buf, "%d\n", TEMP_FROM_REG(data->temp_hyst));
343 }
344
345 static ssize_t set_temp_hyst(struct device *dev, struct device_attribute *attr,
346 const char *buf, size_t count)
347 {
348 struct sis5595_data *data = dev_get_drvdata(dev);
349 long val;
350 int err;
351
352 err = kstrtol(buf, 10, &val);
353 if (err)
354 return err;
355
356 mutex_lock(&data->update_lock);
357 data->temp_hyst = TEMP_TO_REG(val);
358 sis5595_write_value(data, SIS5595_REG_TEMP_HYST, data->temp_hyst);
359 mutex_unlock(&data->update_lock);
360 return count;
361 }
362
363 static DEVICE_ATTR(temp1_input, S_IRUGO, show_temp, NULL);
364 static DEVICE_ATTR(temp1_max, S_IRUGO | S_IWUSR,
365 show_temp_over, set_temp_over);
366 static DEVICE_ATTR(temp1_max_hyst, S_IRUGO | S_IWUSR,
367 show_temp_hyst, set_temp_hyst);
368
369 /* 2 Fans */
370 static ssize_t show_fan(struct device *dev, struct device_attribute *da,
371 char *buf)
372 {
373 struct sis5595_data *data = sis5595_update_device(dev);
374 struct sensor_device_attribute *attr = to_sensor_dev_attr(da);
375 int nr = attr->index;
376 return sprintf(buf, "%d\n", FAN_FROM_REG(data->fan[nr],
377 DIV_FROM_REG(data->fan_div[nr])));
378 }
379
380 static ssize_t show_fan_min(struct device *dev, struct device_attribute *da,
381 char *buf)
382 {
383 struct sis5595_data *data = sis5595_update_device(dev);
384 struct sensor_device_attribute *attr = to_sensor_dev_attr(da);
385 int nr = attr->index;
386 return sprintf(buf, "%d\n", FAN_FROM_REG(data->fan_min[nr],
387 DIV_FROM_REG(data->fan_div[nr])));
388 }
389
390 static ssize_t set_fan_min(struct device *dev, struct device_attribute *da,
391 const char *buf, size_t count)
392 {
393 struct sis5595_data *data = dev_get_drvdata(dev);
394 struct sensor_device_attribute *attr = to_sensor_dev_attr(da);
395 int nr = attr->index;
396 unsigned long val;
397 int err;
398
399 err = kstrtoul(buf, 10, &val);
400 if (err)
401 return err;
402
403 mutex_lock(&data->update_lock);
404 data->fan_min[nr] = FAN_TO_REG(val, DIV_FROM_REG(data->fan_div[nr]));
405 sis5595_write_value(data, SIS5595_REG_FAN_MIN(nr), data->fan_min[nr]);
406 mutex_unlock(&data->update_lock);
407 return count;
408 }
409
410 static ssize_t show_fan_div(struct device *dev, struct device_attribute *da,
411 char *buf)
412 {
413 struct sis5595_data *data = sis5595_update_device(dev);
414 struct sensor_device_attribute *attr = to_sensor_dev_attr(da);
415 int nr = attr->index;
416 return sprintf(buf, "%d\n", DIV_FROM_REG(data->fan_div[nr]));
417 }
418
419 /*
420 * Note: we save and restore the fan minimum here, because its value is
421 * determined in part by the fan divisor. This follows the principle of
422 * least surprise; the user doesn't expect the fan minimum to change just
423 * because the divisor changed.
424 */
425 static ssize_t set_fan_div(struct device *dev, struct device_attribute *da,
426 const char *buf, size_t count)
427 {
428 struct sis5595_data *data = dev_get_drvdata(dev);
429 struct sensor_device_attribute *attr = to_sensor_dev_attr(da);
430 int nr = attr->index;
431 unsigned long min;
432 int reg;
433 unsigned long val;
434 int err;
435
436 err = kstrtoul(buf, 10, &val);
437 if (err)
438 return err;
439
440 mutex_lock(&data->update_lock);
441 min = FAN_FROM_REG(data->fan_min[nr],
442 DIV_FROM_REG(data->fan_div[nr]));
443 reg = sis5595_read_value(data, SIS5595_REG_FANDIV);
444
445 switch (val) {
446 case 1:
447 data->fan_div[nr] = 0;
448 break;
449 case 2:
450 data->fan_div[nr] = 1;
451 break;
452 case 4:
453 data->fan_div[nr] = 2;
454 break;
455 case 8:
456 data->fan_div[nr] = 3;
457 break;
458 default:
459 dev_err(dev, "fan_div value %ld not "
460 "supported. Choose one of 1, 2, 4 or 8!\n", val);
461 mutex_unlock(&data->update_lock);
462 return -EINVAL;
463 }
464
465 switch (nr) {
466 case 0:
467 reg = (reg & 0xcf) | (data->fan_div[nr] << 4);
468 break;
469 case 1:
470 reg = (reg & 0x3f) | (data->fan_div[nr] << 6);
471 break;
472 }
473 sis5595_write_value(data, SIS5595_REG_FANDIV, reg);
474 data->fan_min[nr] =
475 FAN_TO_REG(min, DIV_FROM_REG(data->fan_div[nr]));
476 sis5595_write_value(data, SIS5595_REG_FAN_MIN(nr), data->fan_min[nr]);
477 mutex_unlock(&data->update_lock);
478 return count;
479 }
480
481 #define show_fan_offset(offset) \
482 static SENSOR_DEVICE_ATTR(fan##offset##_input, S_IRUGO, \
483 show_fan, NULL, offset - 1); \
484 static SENSOR_DEVICE_ATTR(fan##offset##_min, S_IRUGO | S_IWUSR, \
485 show_fan_min, set_fan_min, offset - 1); \
486 static SENSOR_DEVICE_ATTR(fan##offset##_div, S_IRUGO | S_IWUSR, \
487 show_fan_div, set_fan_div, offset - 1);
488
489 show_fan_offset(1);
490 show_fan_offset(2);
491
492 /* Alarms */
493 static ssize_t show_alarms(struct device *dev, struct device_attribute *attr,
494 char *buf)
495 {
496 struct sis5595_data *data = sis5595_update_device(dev);
497 return sprintf(buf, "%d\n", data->alarms);
498 }
499 static DEVICE_ATTR(alarms, S_IRUGO, show_alarms, NULL);
500
501 static ssize_t show_alarm(struct device *dev, struct device_attribute *da,
502 char *buf)
503 {
504 struct sis5595_data *data = sis5595_update_device(dev);
505 int nr = to_sensor_dev_attr(da)->index;
506 return sprintf(buf, "%u\n", (data->alarms >> nr) & 1);
507 }
508 static SENSOR_DEVICE_ATTR(in0_alarm, S_IRUGO, show_alarm, NULL, 0);
509 static SENSOR_DEVICE_ATTR(in1_alarm, S_IRUGO, show_alarm, NULL, 1);
510 static SENSOR_DEVICE_ATTR(in2_alarm, S_IRUGO, show_alarm, NULL, 2);
511 static SENSOR_DEVICE_ATTR(in3_alarm, S_IRUGO, show_alarm, NULL, 3);
512 static SENSOR_DEVICE_ATTR(in4_alarm, S_IRUGO, show_alarm, NULL, 15);
513 static SENSOR_DEVICE_ATTR(fan1_alarm, S_IRUGO, show_alarm, NULL, 6);
514 static SENSOR_DEVICE_ATTR(fan2_alarm, S_IRUGO, show_alarm, NULL, 7);
515 static SENSOR_DEVICE_ATTR(temp1_alarm, S_IRUGO, show_alarm, NULL, 15);
516
517 static ssize_t show_name(struct device *dev, struct device_attribute *attr,
518 char *buf)
519 {
520 struct sis5595_data *data = dev_get_drvdata(dev);
521 return sprintf(buf, "%s\n", data->name);
522 }
523 static DEVICE_ATTR(name, S_IRUGO, show_name, NULL);
524
525 static struct attribute *sis5595_attributes[] = {
526 &sensor_dev_attr_in0_input.dev_attr.attr,
527 &sensor_dev_attr_in0_min.dev_attr.attr,
528 &sensor_dev_attr_in0_max.dev_attr.attr,
529 &sensor_dev_attr_in0_alarm.dev_attr.attr,
530 &sensor_dev_attr_in1_input.dev_attr.attr,
531 &sensor_dev_attr_in1_min.dev_attr.attr,
532 &sensor_dev_attr_in1_max.dev_attr.attr,
533 &sensor_dev_attr_in1_alarm.dev_attr.attr,
534 &sensor_dev_attr_in2_input.dev_attr.attr,
535 &sensor_dev_attr_in2_min.dev_attr.attr,
536 &sensor_dev_attr_in2_max.dev_attr.attr,
537 &sensor_dev_attr_in2_alarm.dev_attr.attr,
538 &sensor_dev_attr_in3_input.dev_attr.attr,
539 &sensor_dev_attr_in3_min.dev_attr.attr,
540 &sensor_dev_attr_in3_max.dev_attr.attr,
541 &sensor_dev_attr_in3_alarm.dev_attr.attr,
542
543 &sensor_dev_attr_fan1_input.dev_attr.attr,
544 &sensor_dev_attr_fan1_min.dev_attr.attr,
545 &sensor_dev_attr_fan1_div.dev_attr.attr,
546 &sensor_dev_attr_fan1_alarm.dev_attr.attr,
547 &sensor_dev_attr_fan2_input.dev_attr.attr,
548 &sensor_dev_attr_fan2_min.dev_attr.attr,
549 &sensor_dev_attr_fan2_div.dev_attr.attr,
550 &sensor_dev_attr_fan2_alarm.dev_attr.attr,
551
552 &dev_attr_alarms.attr,
553 &dev_attr_name.attr,
554 NULL
555 };
556
557 static const struct attribute_group sis5595_group = {
558 .attrs = sis5595_attributes,
559 };
560
561 static struct attribute *sis5595_attributes_in4[] = {
562 &sensor_dev_attr_in4_input.dev_attr.attr,
563 &sensor_dev_attr_in4_min.dev_attr.attr,
564 &sensor_dev_attr_in4_max.dev_attr.attr,
565 &sensor_dev_attr_in4_alarm.dev_attr.attr,
566 NULL
567 };
568
569 static const struct attribute_group sis5595_group_in4 = {
570 .attrs = sis5595_attributes_in4,
571 };
572
573 static struct attribute *sis5595_attributes_temp1[] = {
574 &dev_attr_temp1_input.attr,
575 &dev_attr_temp1_max.attr,
576 &dev_attr_temp1_max_hyst.attr,
577 &sensor_dev_attr_temp1_alarm.dev_attr.attr,
578 NULL
579 };
580
581 static const struct attribute_group sis5595_group_temp1 = {
582 .attrs = sis5595_attributes_temp1,
583 };
584
585 /* This is called when the module is loaded */
586 static int __devinit sis5595_probe(struct platform_device *pdev)
587 {
588 int err = 0;
589 int i;
590 struct sis5595_data *data;
591 struct resource *res;
592 char val;
593
594 /* Reserve the ISA region */
595 res = platform_get_resource(pdev, IORESOURCE_IO, 0);
596 if (!request_region(res->start, SIS5595_EXTENT,
597 sis5595_driver.driver.name)) {
598 err = -EBUSY;
599 goto exit;
600 }
601
602 data = kzalloc(sizeof(struct sis5595_data), GFP_KERNEL);
603 if (!data) {
604 err = -ENOMEM;
605 goto exit_release;
606 }
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 goto exit_free;
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 exit_free:
663 kfree(data);
664 exit_release:
665 release_region(res->start, SIS5595_EXTENT);
666 exit:
667 return err;
668 }
669
670 static int __devexit sis5595_remove(struct platform_device *pdev)
671 {
672 struct sis5595_data *data = platform_get_drvdata(pdev);
673
674 hwmon_device_unregister(data->hwmon_dev);
675 sysfs_remove_group(&pdev->dev.kobj, &sis5595_group);
676 sysfs_remove_group(&pdev->dev.kobj, &sis5595_group_in4);
677 sysfs_remove_group(&pdev->dev.kobj, &sis5595_group_temp1);
678
679 release_region(data->addr, SIS5595_EXTENT);
680 platform_set_drvdata(pdev, NULL);
681 kfree(data);
682
683 return 0;
684 }
685
686
687 /* ISA access must be locked explicitly. */
688 static int sis5595_read_value(struct sis5595_data *data, u8 reg)
689 {
690 int res;
691
692 mutex_lock(&data->lock);
693 outb_p(reg, data->addr + SIS5595_ADDR_REG_OFFSET);
694 res = inb_p(data->addr + SIS5595_DATA_REG_OFFSET);
695 mutex_unlock(&data->lock);
696 return res;
697 }
698
699 static void sis5595_write_value(struct sis5595_data *data, u8 reg, u8 value)
700 {
701 mutex_lock(&data->lock);
702 outb_p(reg, data->addr + SIS5595_ADDR_REG_OFFSET);
703 outb_p(value, data->addr + SIS5595_DATA_REG_OFFSET);
704 mutex_unlock(&data->lock);
705 }
706
707 /* Called when we have found a new SIS5595. */
708 static void __devinit sis5595_init_device(struct sis5595_data *data)
709 {
710 u8 config = sis5595_read_value(data, SIS5595_REG_CONFIG);
711 if (!(config & 0x01))
712 sis5595_write_value(data, SIS5595_REG_CONFIG,
713 (config & 0xf7) | 0x01);
714 }
715
716 static struct sis5595_data *sis5595_update_device(struct device *dev)
717 {
718 struct sis5595_data *data = dev_get_drvdata(dev);
719 int i;
720
721 mutex_lock(&data->update_lock);
722
723 if (time_after(jiffies, data->last_updated + HZ + HZ / 2)
724 || !data->valid) {
725
726 for (i = 0; i <= data->maxins; i++) {
727 data->in[i] =
728 sis5595_read_value(data, SIS5595_REG_IN(i));
729 data->in_min[i] =
730 sis5595_read_value(data,
731 SIS5595_REG_IN_MIN(i));
732 data->in_max[i] =
733 sis5595_read_value(data,
734 SIS5595_REG_IN_MAX(i));
735 }
736 for (i = 0; i < 2; i++) {
737 data->fan[i] =
738 sis5595_read_value(data, SIS5595_REG_FAN(i));
739 data->fan_min[i] =
740 sis5595_read_value(data,
741 SIS5595_REG_FAN_MIN(i));
742 }
743 if (data->maxins == 3) {
744 data->temp =
745 sis5595_read_value(data, SIS5595_REG_TEMP);
746 data->temp_over =
747 sis5595_read_value(data, SIS5595_REG_TEMP_OVER);
748 data->temp_hyst =
749 sis5595_read_value(data, SIS5595_REG_TEMP_HYST);
750 }
751 i = sis5595_read_value(data, SIS5595_REG_FANDIV);
752 data->fan_div[0] = (i >> 4) & 0x03;
753 data->fan_div[1] = i >> 6;
754 data->alarms =
755 sis5595_read_value(data, SIS5595_REG_ALARM1) |
756 (sis5595_read_value(data, SIS5595_REG_ALARM2) << 8);
757 data->last_updated = jiffies;
758 data->valid = 1;
759 }
760
761 mutex_unlock(&data->update_lock);
762
763 return data;
764 }
765
766 static DEFINE_PCI_DEVICE_TABLE(sis5595_pci_ids) = {
767 { PCI_DEVICE(PCI_VENDOR_ID_SI, PCI_DEVICE_ID_SI_503) },
768 { 0, }
769 };
770
771 MODULE_DEVICE_TABLE(pci, sis5595_pci_ids);
772
773 static int blacklist[] __devinitdata = {
774 PCI_DEVICE_ID_SI_540,
775 PCI_DEVICE_ID_SI_550,
776 PCI_DEVICE_ID_SI_630,
777 PCI_DEVICE_ID_SI_645,
778 PCI_DEVICE_ID_SI_730,
779 PCI_DEVICE_ID_SI_735,
780 PCI_DEVICE_ID_SI_5511, /*
781 * 5513 chip has the 0008 device but
782 * that ID shows up in other chips so we
783 * use the 5511 ID for recognition
784 */
785 PCI_DEVICE_ID_SI_5597,
786 PCI_DEVICE_ID_SI_5598,
787 0 };
788
789 static int __devinit sis5595_device_add(unsigned short address)
790 {
791 struct resource res = {
792 .start = address,
793 .end = address + SIS5595_EXTENT - 1,
794 .name = "sis5595",
795 .flags = IORESOURCE_IO,
796 };
797 int err;
798
799 err = acpi_check_resource_conflict(&res);
800 if (err)
801 goto exit;
802
803 pdev = platform_device_alloc("sis5595", address);
804 if (!pdev) {
805 err = -ENOMEM;
806 pr_err("Device allocation failed\n");
807 goto exit;
808 }
809
810 err = platform_device_add_resources(pdev, &res, 1);
811 if (err) {
812 pr_err("Device resource addition failed (%d)\n", err);
813 goto exit_device_put;
814 }
815
816 err = platform_device_add(pdev);
817 if (err) {
818 pr_err("Device addition failed (%d)\n", err);
819 goto exit_device_put;
820 }
821
822 return 0;
823
824 exit_device_put:
825 platform_device_put(pdev);
826 exit:
827 return err;
828 }
829
830 static int __devinit sis5595_pci_probe(struct pci_dev *dev,
831 const struct pci_device_id *id)
832 {
833 u16 address;
834 u8 enable;
835 int *i;
836
837 for (i = blacklist; *i != 0; i++) {
838 struct pci_dev *d;
839 d = pci_get_device(PCI_VENDOR_ID_SI, *i, NULL);
840 if (d) {
841 dev_err(&d->dev,
842 "Looked for SIS5595 but found unsupported device %.4x\n",
843 *i);
844 pci_dev_put(d);
845 return -ENODEV;
846 }
847 }
848
849 force_addr &= ~(SIS5595_EXTENT - 1);
850 if (force_addr) {
851 dev_warn(&dev->dev, "Forcing ISA address 0x%x\n", force_addr);
852 pci_write_config_word(dev, SIS5595_BASE_REG, force_addr);
853 }
854
855 if (PCIBIOS_SUCCESSFUL !=
856 pci_read_config_word(dev, SIS5595_BASE_REG, &address)) {
857 dev_err(&dev->dev, "Failed to read ISA address\n");
858 return -ENODEV;
859 }
860
861 address &= ~(SIS5595_EXTENT - 1);
862 if (!address) {
863 dev_err(&dev->dev,
864 "Base address not set - upgrade BIOS or use force_addr=0xaddr\n");
865 return -ENODEV;
866 }
867 if (force_addr && address != force_addr) {
868 /* doesn't work for some chips? */
869 dev_err(&dev->dev, "Failed to force ISA address\n");
870 return -ENODEV;
871 }
872
873 if (PCIBIOS_SUCCESSFUL !=
874 pci_read_config_byte(dev, SIS5595_ENABLE_REG, &enable)) {
875 dev_err(&dev->dev, "Failed to read enable register\n");
876 return -ENODEV;
877 }
878 if (!(enable & 0x80)) {
879 if ((PCIBIOS_SUCCESSFUL !=
880 pci_write_config_byte(dev, SIS5595_ENABLE_REG,
881 enable | 0x80))
882 || (PCIBIOS_SUCCESSFUL !=
883 pci_read_config_byte(dev, SIS5595_ENABLE_REG, &enable))
884 || (!(enable & 0x80))) {
885 /* doesn't work for some chips! */
886 dev_err(&dev->dev, "Failed to enable HWM device\n");
887 return -ENODEV;
888 }
889 }
890
891 if (platform_driver_register(&sis5595_driver)) {
892 dev_dbg(&dev->dev, "Failed to register sis5595 driver\n");
893 goto exit;
894 }
895
896 s_bridge = pci_dev_get(dev);
897 /* Sets global pdev as a side effect */
898 if (sis5595_device_add(address))
899 goto exit_unregister;
900
901 /*
902 * Always return failure here. This is to allow other drivers to bind
903 * to this pci device. We don't really want to have control over the
904 * pci device, we only wanted to read as few register values from it.
905 */
906 return -ENODEV;
907
908 exit_unregister:
909 pci_dev_put(dev);
910 platform_driver_unregister(&sis5595_driver);
911 exit:
912 return -ENODEV;
913 }
914
915 static struct pci_driver sis5595_pci_driver = {
916 .name = "sis5595",
917 .id_table = sis5595_pci_ids,
918 .probe = sis5595_pci_probe,
919 };
920
921 static int __init sm_sis5595_init(void)
922 {
923 return pci_register_driver(&sis5595_pci_driver);
924 }
925
926 static void __exit sm_sis5595_exit(void)
927 {
928 pci_unregister_driver(&sis5595_pci_driver);
929 if (s_bridge != NULL) {
930 platform_device_unregister(pdev);
931 platform_driver_unregister(&sis5595_driver);
932 pci_dev_put(s_bridge);
933 s_bridge = NULL;
934 }
935 }
936
937 MODULE_AUTHOR("Aurelien Jarno <aurelien@aurel32.net>");
938 MODULE_DESCRIPTION("SiS 5595 Sensor device");
939 MODULE_LICENSE("GPL");
940
941 module_init(sm_sis5595_init);
942 module_exit(sm_sis5595_exit);
Linux with added FPC-III support