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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/* If force_addr is set to anything different from 0, we forcibly enable
72 the device at the given address. */
73static u16 force_addr;
74module_param(force_addr, ushort, 0);
75MODULE_PARM_DESC(force_addr,
76 "Initialize the base address of the sensors");
77
78static struct platform_device *pdev;
79
80/* Many SIS5595 constants specified below */
81
82/* Length of ISA address segment */
83#define SIS5595_EXTENT 8
84/* PCI Config Registers */
85#define SIS5595_BASE_REG 0x68
86#define SIS5595_PIN_REG 0x7A
87#define SIS5595_ENABLE_REG 0x7B
88
89/* Where are the ISA address/data registers relative to the base address */
90#define SIS5595_ADDR_REG_OFFSET 5
91#define SIS5595_DATA_REG_OFFSET 6
92
93/* The SIS5595 registers */
94#define SIS5595_REG_IN_MAX(nr) (0x2b + (nr) * 2)
95#define SIS5595_REG_IN_MIN(nr) (0x2c + (nr) * 2)
96#define SIS5595_REG_IN(nr) (0x20 + (nr))
97
98#define SIS5595_REG_FAN_MIN(nr) (0x3b + (nr))
99#define SIS5595_REG_FAN(nr) (0x28 + (nr))
100
101/* On the first version of the chip, the temp registers are separate.
102 On the second version,
103 TEMP pin is shared with IN4, configured in PCI register 0x7A.
104 The registers are the same as well.
105 OVER and HYST are really MAX and MIN. */
106
107#define REV2MIN 0xb0
108#define SIS5595_REG_TEMP (( data->revision) >= REV2MIN) ? \
109 SIS5595_REG_IN(4) : 0x27
110#define SIS5595_REG_TEMP_OVER (( data->revision) >= REV2MIN) ? \
111 SIS5595_REG_IN_MAX(4) : 0x39
112#define SIS5595_REG_TEMP_HYST (( data->revision) >= REV2MIN) ? \
113 SIS5595_REG_IN_MIN(4) : 0x3a
114
115#define SIS5595_REG_CONFIG 0x40
116#define SIS5595_REG_ALARM1 0x41
117#define SIS5595_REG_ALARM2 0x42
118#define SIS5595_REG_FANDIV 0x47
119
120/* Conversions. Limit checking is only done on the TO_REG
121 variants. */
122
123/* IN: mV, (0V to 4.08V)
124 REG: 16mV/bit */
125static inline u8 IN_TO_REG(unsigned long val)
126{
127 unsigned long nval = SENSORS_LIMIT(val, 0, 4080);
128 return (nval + 8) / 16;
129}
130#define IN_FROM_REG(val) ((val) * 16)
131
132static inline u8 FAN_TO_REG(long rpm, int div)
133{
134 if (rpm <= 0)
135 return 255;
136 return SENSORS_LIMIT((1350000 + rpm * div / 2) / (rpm * div), 1, 254);
137}
138
139static inline int FAN_FROM_REG(u8 val, int div)
140{
141 return val==0 ? -1 : val==255 ? 0 : 1350000/(val*div);
142}
143
144/* TEMP: mC (-54.12C to +157.53C)
145 REG: 0.83C/bit + 52.12, two's complement */
146static inline int TEMP_FROM_REG(s8 val)
147{
148 return val * 830 + 52120;
149}
150static inline s8 TEMP_TO_REG(int val)
151{
152 int nval = SENSORS_LIMIT(val, -54120, 157530) ;
153 return nval<0 ? (nval-5212-415)/830 : (nval-5212+415)/830;
154}
155
156/* FAN DIV: 1, 2, 4, or 8 (defaults to 2)
157 REG: 0, 1, 2, or 3 (respectively) (defaults to 1) */
158static inline u8 DIV_TO_REG(int val)
159{
160 return val==8 ? 3 : val==4 ? 2 : val==1 ? 0 : 1;
161}
162#define DIV_FROM_REG(val) (1 << (val))
163
164/* For each registered chip, we need to keep some data in memory.
165 The structure is dynamically allocated. */
166struct sis5595_data {
167 unsigned short addr;
168 const char *name;
169 struct device *hwmon_dev;
170 struct mutex lock;
171
172 struct mutex update_lock;
173 char valid; /* !=0 if following fields are valid */
174 unsigned long last_updated; /* In jiffies */
175 char maxins; /* == 3 if temp enabled, otherwise == 4 */
176 u8 revision; /* Reg. value */
177
178 u8 in[5]; /* Register value */
179 u8 in_max[5]; /* Register value */
180 u8 in_min[5]; /* Register value */
181 u8 fan[2]; /* Register value */
182 u8 fan_min[2]; /* Register value */
183 s8 temp; /* Register value */
184 s8 temp_over; /* Register value */
185 s8 temp_hyst; /* Register value */
186 u8 fan_div[2]; /* Register encoding, shifted right */
187 u16 alarms; /* Register encoding, combined */
188};
189
190static struct pci_dev *s_bridge; /* pointer to the (only) sis5595 */
191
192static int sis5595_probe(struct platform_device *pdev);
193static int __devexit sis5595_remove(struct platform_device *pdev);
194
195static int sis5595_read_value(struct sis5595_data *data, u8 reg);
196static void sis5595_write_value(struct sis5595_data *data, u8 reg, u8 value);
197static struct sis5595_data *sis5595_update_device(struct device *dev);
198static void sis5595_init_device(struct sis5595_data *data);
199
200static struct platform_driver sis5595_driver = {
201 .driver = {
202 .owner = THIS_MODULE,
203 .name = "sis5595",
204 },
205 .probe = sis5595_probe,
206 .remove = __devexit_p(sis5595_remove),
207};
208
209/* 4 Voltages */
210static ssize_t show_in(struct device *dev, struct device_attribute *da,
211 char *buf)
212{
213 struct sis5595_data *data = sis5595_update_device(dev);
214 struct sensor_device_attribute *attr = to_sensor_dev_attr(da);
215 int nr = attr->index;
216 return sprintf(buf, "%d\n", IN_FROM_REG(data->in[nr]));
217}
218
219static ssize_t show_in_min(struct device *dev, struct device_attribute *da,
220 char *buf)
221{
222 struct sis5595_data *data = sis5595_update_device(dev);
223 struct sensor_device_attribute *attr = to_sensor_dev_attr(da);
224 int nr = attr->index;
225 return sprintf(buf, "%d\n", IN_FROM_REG(data->in_min[nr]));
226}
227
228static ssize_t show_in_max(struct device *dev, struct device_attribute *da,
229 char *buf)
230{
231 struct sis5595_data *data = sis5595_update_device(dev);
232 struct sensor_device_attribute *attr = to_sensor_dev_attr(da);
233 int nr = attr->index;
234 return sprintf(buf, "%d\n", IN_FROM_REG(data->in_max[nr]));
235}
236
237static ssize_t set_in_min(struct device *dev, struct device_attribute *da,
238 const char *buf, size_t count)
239{
240 struct sis5595_data *data = dev_get_drvdata(dev);
241 struct sensor_device_attribute *attr = to_sensor_dev_attr(da);
242 int nr = attr->index;
243 unsigned long val = simple_strtoul(buf, NULL, 10);
244
245 mutex_lock(&data->update_lock);
246 data->in_min[nr] = IN_TO_REG(val);
247 sis5595_write_value(data, SIS5595_REG_IN_MIN(nr), data->in_min[nr]);
248 mutex_unlock(&data->update_lock);
249 return count;
250}
251
252static ssize_t set_in_max(struct device *dev, struct device_attribute *da,
253 const char *buf, size_t count)
254{
255 struct sis5595_data *data = dev_get_drvdata(dev);
256 struct sensor_device_attribute *attr = to_sensor_dev_attr(da);
257 int nr = attr->index;
258 unsigned long val = simple_strtoul(buf, NULL, 10);
259
260 mutex_lock(&data->update_lock);
261 data->in_max[nr] = IN_TO_REG(val);
262 sis5595_write_value(data, SIS5595_REG_IN_MAX(nr), data->in_max[nr]);
263 mutex_unlock(&data->update_lock);
264 return count;
265}
266
267#define show_in_offset(offset) \
268static SENSOR_DEVICE_ATTR(in##offset##_input, S_IRUGO, \
269 show_in, NULL, offset); \
270static SENSOR_DEVICE_ATTR(in##offset##_min, S_IRUGO | S_IWUSR, \
271 show_in_min, set_in_min, offset); \
272static SENSOR_DEVICE_ATTR(in##offset##_max, S_IRUGO | S_IWUSR, \
273 show_in_max, set_in_max, offset);
274
275show_in_offset(0);
276show_in_offset(1);
277show_in_offset(2);
278show_in_offset(3);
279show_in_offset(4);
280
281/* Temperature */
282static ssize_t show_temp(struct device *dev, struct device_attribute *attr, char *buf)
283{
284 struct sis5595_data *data = sis5595_update_device(dev);
285 return sprintf(buf, "%d\n", TEMP_FROM_REG(data->temp));
286}
287
288static ssize_t show_temp_over(struct device *dev, struct device_attribute *attr, char *buf)
289{
290 struct sis5595_data *data = sis5595_update_device(dev);
291 return sprintf(buf, "%d\n", TEMP_FROM_REG(data->temp_over));
292}
293
294static ssize_t set_temp_over(struct device *dev, struct device_attribute *attr, const char *buf, size_t count)
295{
296 struct sis5595_data *data = dev_get_drvdata(dev);
297 long val = simple_strtol(buf, NULL, 10);
298
299 mutex_lock(&data->update_lock);
300 data->temp_over = TEMP_TO_REG(val);
301 sis5595_write_value(data, SIS5595_REG_TEMP_OVER, data->temp_over);
302 mutex_unlock(&data->update_lock);
303 return count;
304}
305
306static ssize_t show_temp_hyst(struct device *dev, struct device_attribute *attr, char *buf)
307{
308 struct sis5595_data *data = sis5595_update_device(dev);
309 return sprintf(buf, "%d\n", TEMP_FROM_REG(data->temp_hyst));
310}
311
312static ssize_t set_temp_hyst(struct device *dev, struct device_attribute *attr, const char *buf, size_t count)
313{
314 struct sis5595_data *data = dev_get_drvdata(dev);
315 long val = simple_strtol(buf, NULL, 10);
316
317 mutex_lock(&data->update_lock);
318 data->temp_hyst = TEMP_TO_REG(val);
319 sis5595_write_value(data, SIS5595_REG_TEMP_HYST, data->temp_hyst);
320 mutex_unlock(&data->update_lock);
321 return count;
322}
323
324static DEVICE_ATTR(temp1_input, S_IRUGO, show_temp, NULL);
325static DEVICE_ATTR(temp1_max, S_IRUGO | S_IWUSR,
326 show_temp_over, set_temp_over);
327static DEVICE_ATTR(temp1_max_hyst, S_IRUGO | S_IWUSR,
328 show_temp_hyst, set_temp_hyst);
329
330/* 2 Fans */
331static ssize_t show_fan(struct device *dev, struct device_attribute *da,
332 char *buf)
333{
334 struct sis5595_data *data = sis5595_update_device(dev);
335 struct sensor_device_attribute *attr = to_sensor_dev_attr(da);
336 int nr = attr->index;
337 return sprintf(buf, "%d\n", FAN_FROM_REG(data->fan[nr],
338 DIV_FROM_REG(data->fan_div[nr])) );
339}
340
341static ssize_t show_fan_min(struct device *dev, struct device_attribute *da,
342 char *buf)
343{
344 struct sis5595_data *data = sis5595_update_device(dev);
345 struct sensor_device_attribute *attr = to_sensor_dev_attr(da);
346 int nr = attr->index;
347 return sprintf(buf,"%d\n", FAN_FROM_REG(data->fan_min[nr],
348 DIV_FROM_REG(data->fan_div[nr])) );
349}
350
351static ssize_t set_fan_min(struct device *dev, struct device_attribute *da,
352 const char *buf, size_t count)
353{
354 struct sis5595_data *data = dev_get_drvdata(dev);
355 struct sensor_device_attribute *attr = to_sensor_dev_attr(da);
356 int nr = attr->index;
357 unsigned long val = simple_strtoul(buf, NULL, 10);
358
359 mutex_lock(&data->update_lock);
360 data->fan_min[nr] = FAN_TO_REG(val, DIV_FROM_REG(data->fan_div[nr]));
361 sis5595_write_value(data, SIS5595_REG_FAN_MIN(nr), data->fan_min[nr]);
362 mutex_unlock(&data->update_lock);
363 return count;
364}
365
366static ssize_t show_fan_div(struct device *dev, struct device_attribute *da,
367 char *buf)
368{
369 struct sis5595_data *data = sis5595_update_device(dev);
370 struct sensor_device_attribute *attr = to_sensor_dev_attr(da);
371 int nr = attr->index;
372 return sprintf(buf, "%d\n", DIV_FROM_REG(data->fan_div[nr]) );
373}
374
375/* Note: we save and restore the fan minimum here, because its value is
376 determined in part by the fan divisor. This follows the principle of
377 least surprise; the user doesn't expect the fan minimum to change just
378 because the divisor changed. */
379static ssize_t set_fan_div(struct device *dev, struct device_attribute *da,
380 const char *buf, size_t count)
381{
382 struct sis5595_data *data = dev_get_drvdata(dev);
383 struct sensor_device_attribute *attr = to_sensor_dev_attr(da);
384 int nr = attr->index;
385 unsigned long min;
386 unsigned long val = simple_strtoul(buf, NULL, 10);
387 int reg;
388
389 mutex_lock(&data->update_lock);
390 min = FAN_FROM_REG(data->fan_min[nr],
391 DIV_FROM_REG(data->fan_div[nr]));
392 reg = sis5595_read_value(data, SIS5595_REG_FANDIV);
393
394 switch (val) {
395 case 1: data->fan_div[nr] = 0; break;
396 case 2: data->fan_div[nr] = 1; break;
397 case 4: data->fan_div[nr] = 2; break;
398 case 8: data->fan_div[nr] = 3; break;
399 default:
400 dev_err(dev, "fan_div value %ld not "
401 "supported. Choose one of 1, 2, 4 or 8!\n", val);
402 mutex_unlock(&data->update_lock);
403 return -EINVAL;
404 }
405
406 switch (nr) {
407 case 0:
408 reg = (reg & 0xcf) | (data->fan_div[nr] << 4);
409 break;
410 case 1:
411 reg = (reg & 0x3f) | (data->fan_div[nr] << 6);
412 break;
413 }
414 sis5595_write_value(data, SIS5595_REG_FANDIV, reg);
415 data->fan_min[nr] =
416 FAN_TO_REG(min, DIV_FROM_REG(data->fan_div[nr]));
417 sis5595_write_value(data, SIS5595_REG_FAN_MIN(nr), data->fan_min[nr]);
418 mutex_unlock(&data->update_lock);
419 return count;
420}
421
422#define show_fan_offset(offset) \
423static SENSOR_DEVICE_ATTR(fan##offset##_input, S_IRUGO, \
424 show_fan, NULL, offset - 1); \
425static SENSOR_DEVICE_ATTR(fan##offset##_min, S_IRUGO | S_IWUSR, \
426 show_fan_min, set_fan_min, offset - 1); \
427static SENSOR_DEVICE_ATTR(fan##offset##_div, S_IRUGO | S_IWUSR, \
428 show_fan_div, set_fan_div, offset - 1);
429
430show_fan_offset(1);
431show_fan_offset(2);
432
433/* Alarms */
434static ssize_t show_alarms(struct device *dev, struct device_attribute *attr, char *buf)
435{
436 struct sis5595_data *data = sis5595_update_device(dev);
437 return sprintf(buf, "%d\n", data->alarms);
438}
439static DEVICE_ATTR(alarms, S_IRUGO, show_alarms, NULL);
440
441static ssize_t show_alarm(struct device *dev, struct device_attribute *da,
442 char *buf)
443{
444 struct sis5595_data *data = sis5595_update_device(dev);
445 int nr = to_sensor_dev_attr(da)->index;
446 return sprintf(buf, "%u\n", (data->alarms >> nr) & 1);
447}
448static SENSOR_DEVICE_ATTR(in0_alarm, S_IRUGO, show_alarm, NULL, 0);
449static SENSOR_DEVICE_ATTR(in1_alarm, S_IRUGO, show_alarm, NULL, 1);
450static SENSOR_DEVICE_ATTR(in2_alarm, S_IRUGO, show_alarm, NULL, 2);
451static SENSOR_DEVICE_ATTR(in3_alarm, S_IRUGO, show_alarm, NULL, 3);
452static SENSOR_DEVICE_ATTR(in4_alarm, S_IRUGO, show_alarm, NULL, 15);
453static SENSOR_DEVICE_ATTR(fan1_alarm, S_IRUGO, show_alarm, NULL, 6);
454static SENSOR_DEVICE_ATTR(fan2_alarm, S_IRUGO, show_alarm, NULL, 7);
455static SENSOR_DEVICE_ATTR(temp1_alarm, S_IRUGO, show_alarm, NULL, 15);
456
457static ssize_t show_name(struct device *dev, struct device_attribute *attr,
458 char *buf)
459{
460 struct sis5595_data *data = dev_get_drvdata(dev);
461 return sprintf(buf, "%s\n", data->name);
462}
463static DEVICE_ATTR(name, S_IRUGO, show_name, NULL);
464
465static struct attribute *sis5595_attributes[] = {
466 &sensor_dev_attr_in0_input.dev_attr.attr,
467 &sensor_dev_attr_in0_min.dev_attr.attr,
468 &sensor_dev_attr_in0_max.dev_attr.attr,
469 &sensor_dev_attr_in0_alarm.dev_attr.attr,
470 &sensor_dev_attr_in1_input.dev_attr.attr,
471 &sensor_dev_attr_in1_min.dev_attr.attr,
472 &sensor_dev_attr_in1_max.dev_attr.attr,
473 &sensor_dev_attr_in1_alarm.dev_attr.attr,
474 &sensor_dev_attr_in2_input.dev_attr.attr,
475 &sensor_dev_attr_in2_min.dev_attr.attr,
476 &sensor_dev_attr_in2_max.dev_attr.attr,
477 &sensor_dev_attr_in2_alarm.dev_attr.attr,
478 &sensor_dev_attr_in3_input.dev_attr.attr,
479 &sensor_dev_attr_in3_min.dev_attr.attr,
480 &sensor_dev_attr_in3_max.dev_attr.attr,
481 &sensor_dev_attr_in3_alarm.dev_attr.attr,
482
483 &sensor_dev_attr_fan1_input.dev_attr.attr,
484 &sensor_dev_attr_fan1_min.dev_attr.attr,
485 &sensor_dev_attr_fan1_div.dev_attr.attr,
486 &sensor_dev_attr_fan1_alarm.dev_attr.attr,
487 &sensor_dev_attr_fan2_input.dev_attr.attr,
488 &sensor_dev_attr_fan2_min.dev_attr.attr,
489 &sensor_dev_attr_fan2_div.dev_attr.attr,
490 &sensor_dev_attr_fan2_alarm.dev_attr.attr,
491
492 &dev_attr_alarms.attr,
493 &dev_attr_name.attr,
494 NULL
495};
496
497static const struct attribute_group sis5595_group = {
498 .attrs = sis5595_attributes,
499};
500
501static struct attribute *sis5595_attributes_in4[] = {
502 &sensor_dev_attr_in4_input.dev_attr.attr,
503 &sensor_dev_attr_in4_min.dev_attr.attr,
504 &sensor_dev_attr_in4_max.dev_attr.attr,
505 &sensor_dev_attr_in4_alarm.dev_attr.attr,
506 NULL
507};
508
509static const struct attribute_group sis5595_group_in4 = {
510 .attrs = sis5595_attributes_in4,
511};
512
513static struct attribute *sis5595_attributes_temp1[] = {
514 &dev_attr_temp1_input.attr,
515 &dev_attr_temp1_max.attr,
516 &dev_attr_temp1_max_hyst.attr,
517 &sensor_dev_attr_temp1_alarm.dev_attr.attr,
518 NULL
519};
520
521static const struct attribute_group sis5595_group_temp1 = {
522 .attrs = sis5595_attributes_temp1,
523};
524
525/* This is called when the module is loaded */
526static int __devinit sis5595_probe(struct platform_device *pdev)
527{
528 int err = 0;
529 int i;
530 struct sis5595_data *data;
531 struct resource *res;
532 char val;
533
534 /* Reserve the ISA region */
535 res = platform_get_resource(pdev, IORESOURCE_IO, 0);
536 if (!request_region(res->start, SIS5595_EXTENT,
537 sis5595_driver.driver.name)) {
538 err = -EBUSY;
539 goto exit;
540 }
541
542 if (!(data = kzalloc(sizeof(struct sis5595_data), GFP_KERNEL))) {
543 err = -ENOMEM;
544 goto exit_release;
545 }
546
547 mutex_init(&data->lock);
548 mutex_init(&data->update_lock);
549 data->addr = res->start;
550 data->name = "sis5595";
551 platform_set_drvdata(pdev, data);
552
553 /* Check revision and pin registers to determine whether 4 or 5 voltages */
554 data->revision = s_bridge->revision;
555 /* 4 voltages, 1 temp */
556 data->maxins = 3;
557 if (data->revision >= REV2MIN) {
558 pci_read_config_byte(s_bridge, SIS5595_PIN_REG, &val);
559 if (!(val & 0x80))
560 /* 5 voltages, no temps */
561 data->maxins = 4;
562 }
563
564 /* Initialize the SIS5595 chip */
565 sis5595_init_device(data);
566
567 /* A few vars need to be filled upon startup */
568 for (i = 0; i < 2; i++) {
569 data->fan_min[i] = sis5595_read_value(data,
570 SIS5595_REG_FAN_MIN(i));
571 }
572
573 /* Register sysfs hooks */
574 if ((err = sysfs_create_group(&pdev->dev.kobj, &sis5595_group)))
575 goto exit_free;
576 if (data->maxins == 4) {
577 if ((err = sysfs_create_group(&pdev->dev.kobj,
578 &sis5595_group_in4)))
579 goto exit_remove_files;
580 } else {
581 if ((err = sysfs_create_group(&pdev->dev.kobj,
582 &sis5595_group_temp1)))
583 goto exit_remove_files;
584 }
585
586 data->hwmon_dev = hwmon_device_register(&pdev->dev);
587 if (IS_ERR(data->hwmon_dev)) {
588 err = PTR_ERR(data->hwmon_dev);
589 goto exit_remove_files;
590 }
591
592 return 0;
593
594exit_remove_files:
595 sysfs_remove_group(&pdev->dev.kobj, &sis5595_group);
596 sysfs_remove_group(&pdev->dev.kobj, &sis5595_group_in4);
597 sysfs_remove_group(&pdev->dev.kobj, &sis5595_group_temp1);
598exit_free:
599 kfree(data);
600exit_release:
601 release_region(res->start, SIS5595_EXTENT);
602exit:
603 return err;
604}
605
606static int __devexit sis5595_remove(struct platform_device *pdev)
607{
608 struct sis5595_data *data = platform_get_drvdata(pdev);
609
610 hwmon_device_unregister(data->hwmon_dev);
611 sysfs_remove_group(&pdev->dev.kobj, &sis5595_group);
612 sysfs_remove_group(&pdev->dev.kobj, &sis5595_group_in4);
613 sysfs_remove_group(&pdev->dev.kobj, &sis5595_group_temp1);
614
615 release_region(data->addr, SIS5595_EXTENT);
616 platform_set_drvdata(pdev, NULL);
617 kfree(data);
618
619 return 0;
620}
621
622
623/* ISA access must be locked explicitly. */
624static int sis5595_read_value(struct sis5595_data *data, u8 reg)
625{
626 int res;
627
628 mutex_lock(&data->lock);
629 outb_p(reg, data->addr + SIS5595_ADDR_REG_OFFSET);
630 res = inb_p(data->addr + SIS5595_DATA_REG_OFFSET);
631 mutex_unlock(&data->lock);
632 return res;
633}
634
635static void sis5595_write_value(struct sis5595_data *data, u8 reg, u8 value)
636{
637 mutex_lock(&data->lock);
638 outb_p(reg, data->addr + SIS5595_ADDR_REG_OFFSET);
639 outb_p(value, data->addr + SIS5595_DATA_REG_OFFSET);
640 mutex_unlock(&data->lock);
641}
642
643/* Called when we have found a new SIS5595. */
644static void __devinit sis5595_init_device(struct sis5595_data *data)
645{
646 u8 config = sis5595_read_value(data, SIS5595_REG_CONFIG);
647 if (!(config & 0x01))
648 sis5595_write_value(data, SIS5595_REG_CONFIG,
649 (config & 0xf7) | 0x01);
650}
651
652static struct sis5595_data *sis5595_update_device(struct device *dev)
653{
654 struct sis5595_data *data = dev_get_drvdata(dev);
655 int i;
656
657 mutex_lock(&data->update_lock);
658
659 if (time_after(jiffies, data->last_updated + HZ + HZ / 2)
660 || !data->valid) {
661
662 for (i = 0; i <= data->maxins; i++) {
663 data->in[i] =
664 sis5595_read_value(data, SIS5595_REG_IN(i));
665 data->in_min[i] =
666 sis5595_read_value(data,
667 SIS5595_REG_IN_MIN(i));
668 data->in_max[i] =
669 sis5595_read_value(data,
670 SIS5595_REG_IN_MAX(i));
671 }
672 for (i = 0; i < 2; i++) {
673 data->fan[i] =
674 sis5595_read_value(data, SIS5595_REG_FAN(i));
675 data->fan_min[i] =
676 sis5595_read_value(data,
677 SIS5595_REG_FAN_MIN(i));
678 }
679 if (data->maxins == 3) {
680 data->temp =
681 sis5595_read_value(data, SIS5595_REG_TEMP);
682 data->temp_over =
683 sis5595_read_value(data, SIS5595_REG_TEMP_OVER);
684 data->temp_hyst =
685 sis5595_read_value(data, SIS5595_REG_TEMP_HYST);
686 }
687 i = sis5595_read_value(data, SIS5595_REG_FANDIV);
688 data->fan_div[0] = (i >> 4) & 0x03;
689 data->fan_div[1] = i >> 6;
690 data->alarms =
691 sis5595_read_value(data, SIS5595_REG_ALARM1) |
692 (sis5595_read_value(data, SIS5595_REG_ALARM2) << 8);
693 data->last_updated = jiffies;
694 data->valid = 1;
695 }
696
697 mutex_unlock(&data->update_lock);
698
699 return data;
700}
701
702static const struct pci_device_id sis5595_pci_ids[] = {
703 { PCI_DEVICE(PCI_VENDOR_ID_SI, PCI_DEVICE_ID_SI_503) },
704 { 0, }
705};
706
707MODULE_DEVICE_TABLE(pci, sis5595_pci_ids);
708
709static int blacklist[] __devinitdata = {
710 PCI_DEVICE_ID_SI_540,
711 PCI_DEVICE_ID_SI_550,
712 PCI_DEVICE_ID_SI_630,
713 PCI_DEVICE_ID_SI_645,
714 PCI_DEVICE_ID_SI_730,
715 PCI_DEVICE_ID_SI_735,
716 PCI_DEVICE_ID_SI_5511, /* 5513 chip has the 0008 device but
717 that ID shows up in other chips so we
718 use the 5511 ID for recognition */
719 PCI_DEVICE_ID_SI_5597,
720 PCI_DEVICE_ID_SI_5598,
721 0 };
722
723static int __devinit sis5595_device_add(unsigned short address)
724{
725 struct resource res = {
726 .start = address,
727 .end = address + SIS5595_EXTENT - 1,
728 .name = "sis5595",
729 .flags = IORESOURCE_IO,
730 };
731 int err;
732
733 err = acpi_check_resource_conflict(&res);
734 if (err)
735 goto exit;
736
737 pdev = platform_device_alloc("sis5595", address);
738 if (!pdev) {
739 err = -ENOMEM;
740 pr_err("Device allocation failed\n");
741 goto exit;
742 }
743
744 err = platform_device_add_resources(pdev, &res, 1);
745 if (err) {
746 pr_err("Device resource addition failed (%d)\n", err);
747 goto exit_device_put;
748 }
749
750 err = platform_device_add(pdev);
751 if (err) {
752 pr_err("Device addition failed (%d)\n", err);
753 goto exit_device_put;
754 }
755
756 return 0;
757
758exit_device_put:
759 platform_device_put(pdev);
760exit:
761 return err;
762}
763
764static int __devinit sis5595_pci_probe(struct pci_dev *dev,
765 const struct pci_device_id *id)
766{
767 u16 address;
768 u8 enable;
769 int *i;
770
771 for (i = blacklist; *i != 0; i++) {
772 struct pci_dev *d;
773 if ((d = pci_get_device(PCI_VENDOR_ID_SI, *i, NULL))) {
774 dev_err(&d->dev, "Looked for SIS5595 but found unsupported device %.4x\n", *i);
775 pci_dev_put(d);
776 return -ENODEV;
777 }
778 }
779
780 force_addr &= ~(SIS5595_EXTENT - 1);
781 if (force_addr) {
782 dev_warn(&dev->dev, "Forcing ISA address 0x%x\n", force_addr);
783 pci_write_config_word(dev, SIS5595_BASE_REG, force_addr);
784 }
785
786 if (PCIBIOS_SUCCESSFUL !=
787 pci_read_config_word(dev, SIS5595_BASE_REG, &address)) {
788 dev_err(&dev->dev, "Failed to read ISA address\n");
789 return -ENODEV;
790 }
791
792 address &= ~(SIS5595_EXTENT - 1);
793 if (!address) {
794 dev_err(&dev->dev, "Base address not set - upgrade BIOS or use force_addr=0xaddr\n");
795 return -ENODEV;
796 }
797 if (force_addr && address != force_addr) {
798 /* doesn't work for some chips? */
799 dev_err(&dev->dev, "Failed to force ISA address\n");
800 return -ENODEV;
801 }
802
803 if (PCIBIOS_SUCCESSFUL !=
804 pci_read_config_byte(dev, SIS5595_ENABLE_REG, &enable)) {
805 dev_err(&dev->dev, "Failed to read enable register\n");
806 return -ENODEV;
807 }
808 if (!(enable & 0x80)) {
809 if ((PCIBIOS_SUCCESSFUL !=
810 pci_write_config_byte(dev, SIS5595_ENABLE_REG,
811 enable | 0x80))
812 || (PCIBIOS_SUCCESSFUL !=
813 pci_read_config_byte(dev, SIS5595_ENABLE_REG, &enable))
814 || (!(enable & 0x80))) {
815 /* doesn't work for some chips! */
816 dev_err(&dev->dev, "Failed to enable HWM device\n");
817 return -ENODEV;
818 }
819 }
820
821 if (platform_driver_register(&sis5595_driver)) {
822 dev_dbg(&dev->dev, "Failed to register sis5595 driver\n");
823 goto exit;
824 }
825
826 s_bridge = pci_dev_get(dev);
827 /* Sets global pdev as a side effect */
828 if (sis5595_device_add(address))
829 goto exit_unregister;
830
831 /* Always return failure here. This is to allow other drivers to bind
832 * to this pci device. We don't really want to have control over the
833 * pci device, we only wanted to read as few register values from it.
834 */
835 return -ENODEV;
836
837exit_unregister:
838 pci_dev_put(dev);
839 platform_driver_unregister(&sis5595_driver);
840exit:
841 return -ENODEV;
842}
843
844static struct pci_driver sis5595_pci_driver = {
845 .name = "sis5595",
846 .id_table = sis5595_pci_ids,
847 .probe = sis5595_pci_probe,
848};
849
850static int __init sm_sis5595_init(void)
851{
852 return pci_register_driver(&sis5595_pci_driver);
853}
854
855static void __exit sm_sis5595_exit(void)
856{
857 pci_unregister_driver(&sis5595_pci_driver);
858 if (s_bridge != NULL) {
859 platform_device_unregister(pdev);
860 platform_driver_unregister(&sis5595_driver);
861 pci_dev_put(s_bridge);
862 s_bridge = NULL;
863 }
864}
865
866MODULE_AUTHOR("Aurelien Jarno <aurelien@aurel32.net>");
867MODULE_DESCRIPTION("SiS 5595 Sensor device");
868MODULE_LICENSE("GPL");
869
870module_init(sm_sis5595_init);
871module_exit(sm_sis5595_exit);
1// SPDX-License-Identifier: GPL-2.0-or-later
2/*
3 * sis5595.c - Part of lm_sensors, Linux kernel modules
4 * for hardware monitoring
5 *
6 * Copyright (C) 1998 - 2001 Frodo Looijaard <frodol@dds.nl>,
7 * Kyösti Mälkki <kmalkki@cc.hut.fi>, and
8 * Mark D. Studebaker <mdsxyz123@yahoo.com>
9 * Ported to Linux 2.6 by Aurelien Jarno <aurelien@aurel32.net> with
10 * the help of Jean Delvare <jdelvare@suse.de>
11 */
12
13/*
14 * SiS southbridge has a LM78-like chip integrated on the same IC.
15 * This driver is a customized copy of lm78.c
16 *
17 * Supports following revisions:
18 * Version PCI ID PCI Revision
19 * 1 1039/0008 AF or less
20 * 2 1039/0008 B0 or greater
21 *
22 * Note: these chips contain a 0008 device which is incompatible with the
23 * 5595. We recognize these by the presence of the listed
24 * "blacklist" PCI ID and refuse to load.
25 *
26 * NOT SUPPORTED PCI ID BLACKLIST PCI ID
27 * 540 0008 0540
28 * 550 0008 0550
29 * 5513 0008 5511
30 * 5581 0008 5597
31 * 5582 0008 5597
32 * 5597 0008 5597
33 * 5598 0008 5597/5598
34 * 630 0008 0630
35 * 645 0008 0645
36 * 730 0008 0730
37 * 735 0008 0735
38 */
39
40#define DRIVER_NAME "sis5595"
41#define pr_fmt(fmt) KBUILD_MODNAME ": " fmt
42
43#include <linux/module.h>
44#include <linux/slab.h>
45#include <linux/ioport.h>
46#include <linux/pci.h>
47#include <linux/platform_device.h>
48#include <linux/hwmon.h>
49#include <linux/hwmon-sysfs.h>
50#include <linux/err.h>
51#include <linux/init.h>
52#include <linux/jiffies.h>
53#include <linux/mutex.h>
54#include <linux/sysfs.h>
55#include <linux/acpi.h>
56#include <linux/io.h>
57
58/*
59 * If force_addr is set to anything different from 0, we forcibly enable
60 * the device at the given address.
61 */
62static u16 force_addr;
63module_param(force_addr, ushort, 0);
64MODULE_PARM_DESC(force_addr,
65 "Initialize the base address of the sensors");
66
67static struct platform_device *pdev;
68
69/* Many SIS5595 constants specified below */
70
71/* Length of ISA address segment */
72#define SIS5595_EXTENT 8
73/* PCI Config Registers */
74#define SIS5595_BASE_REG 0x68
75#define SIS5595_PIN_REG 0x7A
76#define SIS5595_ENABLE_REG 0x7B
77
78/* Where are the ISA address/data registers relative to the base address */
79#define SIS5595_ADDR_REG_OFFSET 5
80#define SIS5595_DATA_REG_OFFSET 6
81
82/* The SIS5595 registers */
83#define SIS5595_REG_IN_MAX(nr) (0x2b + (nr) * 2)
84#define SIS5595_REG_IN_MIN(nr) (0x2c + (nr) * 2)
85#define SIS5595_REG_IN(nr) (0x20 + (nr))
86
87#define SIS5595_REG_FAN_MIN(nr) (0x3b + (nr))
88#define SIS5595_REG_FAN(nr) (0x28 + (nr))
89
90/*
91 * On the first version of the chip, the temp registers are separate.
92 * On the second version,
93 * TEMP pin is shared with IN4, configured in PCI register 0x7A.
94 * The registers are the same as well.
95 * OVER and HYST are really MAX and MIN.
96 */
97
98#define REV2MIN 0xb0
99#define SIS5595_REG_TEMP (((data->revision) >= REV2MIN) ? \
100 SIS5595_REG_IN(4) : 0x27)
101#define SIS5595_REG_TEMP_OVER (((data->revision) >= REV2MIN) ? \
102 SIS5595_REG_IN_MAX(4) : 0x39)
103#define SIS5595_REG_TEMP_HYST (((data->revision) >= REV2MIN) ? \
104 SIS5595_REG_IN_MIN(4) : 0x3a)
105
106#define SIS5595_REG_CONFIG 0x40
107#define SIS5595_REG_ALARM1 0x41
108#define SIS5595_REG_ALARM2 0x42
109#define SIS5595_REG_FANDIV 0x47
110
111/*
112 * Conversions. Limit checking is only done on the TO_REG
113 * variants.
114 */
115
116/*
117 * IN: mV, (0V to 4.08V)
118 * REG: 16mV/bit
119 */
120static inline u8 IN_TO_REG(unsigned long val)
121{
122 unsigned long nval = clamp_val(val, 0, 4080);
123 return (nval + 8) / 16;
124}
125#define IN_FROM_REG(val) ((val) * 16)
126
127static inline u8 FAN_TO_REG(long rpm, int div)
128{
129 if (rpm <= 0)
130 return 255;
131 if (rpm > 1350000)
132 return 1;
133 return clamp_val((1350000 + rpm * div / 2) / (rpm * div), 1, 254);
134}
135
136static inline int FAN_FROM_REG(u8 val, int div)
137{
138 return val == 0 ? -1 : val == 255 ? 0 : 1350000 / (val * div);
139}
140
141/*
142 * TEMP: mC (-54.12C to +157.53C)
143 * REG: 0.83C/bit + 52.12, two's complement
144 */
145static inline int TEMP_FROM_REG(s8 val)
146{
147 return val * 830 + 52120;
148}
149static inline s8 TEMP_TO_REG(long val)
150{
151 int nval = clamp_val(val, -54120, 157530) ;
152 return nval < 0 ? (nval - 5212 - 415) / 830 : (nval - 5212 + 415) / 830;
153}
154
155/*
156 * FAN DIV: 1, 2, 4, or 8 (defaults to 2)
157 * REG: 0, 1, 2, or 3 (respectively) (defaults to 1)
158 */
159static inline u8 DIV_TO_REG(int val)
160{
161 return val == 8 ? 3 : val == 4 ? 2 : val == 1 ? 0 : 1;
162}
163#define DIV_FROM_REG(val) (1 << (val))
164
165/*
166 * For each registered chip, we need to keep some data in memory.
167 * The structure is dynamically allocated.
168 */
169struct sis5595_data {
170 unsigned short addr;
171 const char *name;
172 struct device *hwmon_dev;
173 struct mutex lock;
174
175 struct mutex update_lock;
176 bool valid; /* true if following fields are valid */
177 unsigned long last_updated; /* In jiffies */
178 char maxins; /* == 3 if temp enabled, otherwise == 4 */
179 u8 revision; /* Reg. value */
180
181 u8 in[5]; /* Register value */
182 u8 in_max[5]; /* Register value */
183 u8 in_min[5]; /* Register value */
184 u8 fan[2]; /* Register value */
185 u8 fan_min[2]; /* Register value */
186 s8 temp; /* Register value */
187 s8 temp_over; /* Register value */
188 s8 temp_hyst; /* Register value */
189 u8 fan_div[2]; /* Register encoding, shifted right */
190 u16 alarms; /* Register encoding, combined */
191};
192
193static struct pci_dev *s_bridge; /* pointer to the (only) sis5595 */
194
195/* ISA access must be locked explicitly. */
196static int sis5595_read_value(struct sis5595_data *data, u8 reg)
197{
198 int res;
199
200 mutex_lock(&data->lock);
201 outb_p(reg, data->addr + SIS5595_ADDR_REG_OFFSET);
202 res = inb_p(data->addr + SIS5595_DATA_REG_OFFSET);
203 mutex_unlock(&data->lock);
204 return res;
205}
206
207static void sis5595_write_value(struct sis5595_data *data, u8 reg, u8 value)
208{
209 mutex_lock(&data->lock);
210 outb_p(reg, data->addr + SIS5595_ADDR_REG_OFFSET);
211 outb_p(value, data->addr + SIS5595_DATA_REG_OFFSET);
212 mutex_unlock(&data->lock);
213}
214
215static struct sis5595_data *sis5595_update_device(struct device *dev)
216{
217 struct sis5595_data *data = dev_get_drvdata(dev);
218 int i;
219
220 mutex_lock(&data->update_lock);
221
222 if (time_after(jiffies, data->last_updated + HZ + HZ / 2)
223 || !data->valid) {
224
225 for (i = 0; i <= data->maxins; i++) {
226 data->in[i] =
227 sis5595_read_value(data, SIS5595_REG_IN(i));
228 data->in_min[i] =
229 sis5595_read_value(data,
230 SIS5595_REG_IN_MIN(i));
231 data->in_max[i] =
232 sis5595_read_value(data,
233 SIS5595_REG_IN_MAX(i));
234 }
235 for (i = 0; i < 2; i++) {
236 data->fan[i] =
237 sis5595_read_value(data, SIS5595_REG_FAN(i));
238 data->fan_min[i] =
239 sis5595_read_value(data,
240 SIS5595_REG_FAN_MIN(i));
241 }
242 if (data->maxins == 3) {
243 data->temp =
244 sis5595_read_value(data, SIS5595_REG_TEMP);
245 data->temp_over =
246 sis5595_read_value(data, SIS5595_REG_TEMP_OVER);
247 data->temp_hyst =
248 sis5595_read_value(data, SIS5595_REG_TEMP_HYST);
249 }
250 i = sis5595_read_value(data, SIS5595_REG_FANDIV);
251 data->fan_div[0] = (i >> 4) & 0x03;
252 data->fan_div[1] = i >> 6;
253 data->alarms =
254 sis5595_read_value(data, SIS5595_REG_ALARM1) |
255 (sis5595_read_value(data, SIS5595_REG_ALARM2) << 8);
256 data->last_updated = jiffies;
257 data->valid = true;
258 }
259
260 mutex_unlock(&data->update_lock);
261
262 return data;
263}
264
265/* 4 Voltages */
266static ssize_t in_show(struct device *dev, struct device_attribute *da,
267 char *buf)
268{
269 struct sis5595_data *data = sis5595_update_device(dev);
270 struct sensor_device_attribute *attr = to_sensor_dev_attr(da);
271 int nr = attr->index;
272 return sprintf(buf, "%d\n", IN_FROM_REG(data->in[nr]));
273}
274
275static ssize_t in_min_show(struct device *dev, struct device_attribute *da,
276 char *buf)
277{
278 struct sis5595_data *data = sis5595_update_device(dev);
279 struct sensor_device_attribute *attr = to_sensor_dev_attr(da);
280 int nr = attr->index;
281 return sprintf(buf, "%d\n", IN_FROM_REG(data->in_min[nr]));
282}
283
284static ssize_t in_max_show(struct device *dev, struct device_attribute *da,
285 char *buf)
286{
287 struct sis5595_data *data = sis5595_update_device(dev);
288 struct sensor_device_attribute *attr = to_sensor_dev_attr(da);
289 int nr = attr->index;
290 return sprintf(buf, "%d\n", IN_FROM_REG(data->in_max[nr]));
291}
292
293static ssize_t in_min_store(struct device *dev, struct device_attribute *da,
294 const char *buf, size_t count)
295{
296 struct sis5595_data *data = dev_get_drvdata(dev);
297 struct sensor_device_attribute *attr = to_sensor_dev_attr(da);
298 int nr = attr->index;
299 unsigned long val;
300 int err;
301
302 err = kstrtoul(buf, 10, &val);
303 if (err)
304 return err;
305
306 mutex_lock(&data->update_lock);
307 data->in_min[nr] = IN_TO_REG(val);
308 sis5595_write_value(data, SIS5595_REG_IN_MIN(nr), data->in_min[nr]);
309 mutex_unlock(&data->update_lock);
310 return count;
311}
312
313static ssize_t in_max_store(struct device *dev, struct device_attribute *da,
314 const char *buf, size_t count)
315{
316 struct sis5595_data *data = dev_get_drvdata(dev);
317 struct sensor_device_attribute *attr = to_sensor_dev_attr(da);
318 int nr = attr->index;
319 unsigned long val;
320 int err;
321
322 err = kstrtoul(buf, 10, &val);
323 if (err)
324 return err;
325
326 mutex_lock(&data->update_lock);
327 data->in_max[nr] = IN_TO_REG(val);
328 sis5595_write_value(data, SIS5595_REG_IN_MAX(nr), data->in_max[nr]);
329 mutex_unlock(&data->update_lock);
330 return count;
331}
332
333static SENSOR_DEVICE_ATTR_RO(in0_input, in, 0);
334static SENSOR_DEVICE_ATTR_RW(in0_min, in_min, 0);
335static SENSOR_DEVICE_ATTR_RW(in0_max, in_max, 0);
336static SENSOR_DEVICE_ATTR_RO(in1_input, in, 1);
337static SENSOR_DEVICE_ATTR_RW(in1_min, in_min, 1);
338static SENSOR_DEVICE_ATTR_RW(in1_max, in_max, 1);
339static SENSOR_DEVICE_ATTR_RO(in2_input, in, 2);
340static SENSOR_DEVICE_ATTR_RW(in2_min, in_min, 2);
341static SENSOR_DEVICE_ATTR_RW(in2_max, in_max, 2);
342static SENSOR_DEVICE_ATTR_RO(in3_input, in, 3);
343static SENSOR_DEVICE_ATTR_RW(in3_min, in_min, 3);
344static SENSOR_DEVICE_ATTR_RW(in3_max, in_max, 3);
345static SENSOR_DEVICE_ATTR_RO(in4_input, in, 4);
346static SENSOR_DEVICE_ATTR_RW(in4_min, in_min, 4);
347static SENSOR_DEVICE_ATTR_RW(in4_max, in_max, 4);
348
349/* Temperature */
350static ssize_t temp1_input_show(struct device *dev,
351 struct device_attribute *attr, char *buf)
352{
353 struct sis5595_data *data = sis5595_update_device(dev);
354 return sprintf(buf, "%d\n", TEMP_FROM_REG(data->temp));
355}
356
357static ssize_t temp1_max_show(struct device *dev, struct device_attribute *attr,
358 char *buf)
359{
360 struct sis5595_data *data = sis5595_update_device(dev);
361 return sprintf(buf, "%d\n", TEMP_FROM_REG(data->temp_over));
362}
363
364static ssize_t temp1_max_store(struct device *dev,
365 struct device_attribute *attr, const char *buf,
366 size_t count)
367{
368 struct sis5595_data *data = dev_get_drvdata(dev);
369 long val;
370 int err;
371
372 err = kstrtol(buf, 10, &val);
373 if (err)
374 return err;
375
376 mutex_lock(&data->update_lock);
377 data->temp_over = TEMP_TO_REG(val);
378 sis5595_write_value(data, SIS5595_REG_TEMP_OVER, data->temp_over);
379 mutex_unlock(&data->update_lock);
380 return count;
381}
382
383static ssize_t temp1_max_hyst_show(struct device *dev,
384 struct device_attribute *attr, char *buf)
385{
386 struct sis5595_data *data = sis5595_update_device(dev);
387 return sprintf(buf, "%d\n", TEMP_FROM_REG(data->temp_hyst));
388}
389
390static ssize_t temp1_max_hyst_store(struct device *dev,
391 struct device_attribute *attr,
392 const char *buf, size_t count)
393{
394 struct sis5595_data *data = dev_get_drvdata(dev);
395 long val;
396 int err;
397
398 err = kstrtol(buf, 10, &val);
399 if (err)
400 return err;
401
402 mutex_lock(&data->update_lock);
403 data->temp_hyst = TEMP_TO_REG(val);
404 sis5595_write_value(data, SIS5595_REG_TEMP_HYST, data->temp_hyst);
405 mutex_unlock(&data->update_lock);
406 return count;
407}
408
409static DEVICE_ATTR_RO(temp1_input);
410static DEVICE_ATTR_RW(temp1_max);
411static DEVICE_ATTR_RW(temp1_max_hyst);
412
413/* 2 Fans */
414static ssize_t fan_show(struct device *dev, struct device_attribute *da,
415 char *buf)
416{
417 struct sis5595_data *data = sis5595_update_device(dev);
418 struct sensor_device_attribute *attr = to_sensor_dev_attr(da);
419 int nr = attr->index;
420 return sprintf(buf, "%d\n", FAN_FROM_REG(data->fan[nr],
421 DIV_FROM_REG(data->fan_div[nr])));
422}
423
424static ssize_t fan_min_show(struct device *dev, struct device_attribute *da,
425 char *buf)
426{
427 struct sis5595_data *data = sis5595_update_device(dev);
428 struct sensor_device_attribute *attr = to_sensor_dev_attr(da);
429 int nr = attr->index;
430 return sprintf(buf, "%d\n", FAN_FROM_REG(data->fan_min[nr],
431 DIV_FROM_REG(data->fan_div[nr])));
432}
433
434static ssize_t fan_min_store(struct device *dev, struct device_attribute *da,
435 const char *buf, size_t count)
436{
437 struct sis5595_data *data = dev_get_drvdata(dev);
438 struct sensor_device_attribute *attr = to_sensor_dev_attr(da);
439 int nr = attr->index;
440 unsigned long val;
441 int err;
442
443 err = kstrtoul(buf, 10, &val);
444 if (err)
445 return err;
446
447 mutex_lock(&data->update_lock);
448 data->fan_min[nr] = FAN_TO_REG(val, DIV_FROM_REG(data->fan_div[nr]));
449 sis5595_write_value(data, SIS5595_REG_FAN_MIN(nr), data->fan_min[nr]);
450 mutex_unlock(&data->update_lock);
451 return count;
452}
453
454static ssize_t fan_div_show(struct device *dev, struct device_attribute *da,
455 char *buf)
456{
457 struct sis5595_data *data = sis5595_update_device(dev);
458 struct sensor_device_attribute *attr = to_sensor_dev_attr(da);
459 int nr = attr->index;
460 return sprintf(buf, "%d\n", DIV_FROM_REG(data->fan_div[nr]));
461}
462
463/*
464 * Note: we save and restore the fan minimum here, because its value is
465 * determined in part by the fan divisor. This follows the principle of
466 * least surprise; the user doesn't expect the fan minimum to change just
467 * because the divisor changed.
468 */
469static ssize_t fan_div_store(struct device *dev, struct device_attribute *da,
470 const char *buf, size_t count)
471{
472 struct sis5595_data *data = dev_get_drvdata(dev);
473 struct sensor_device_attribute *attr = to_sensor_dev_attr(da);
474 int nr = attr->index;
475 unsigned long min;
476 int reg;
477 unsigned long val;
478 int err;
479
480 err = kstrtoul(buf, 10, &val);
481 if (err)
482 return err;
483
484 mutex_lock(&data->update_lock);
485 min = FAN_FROM_REG(data->fan_min[nr],
486 DIV_FROM_REG(data->fan_div[nr]));
487 reg = sis5595_read_value(data, SIS5595_REG_FANDIV);
488
489 switch (val) {
490 case 1:
491 data->fan_div[nr] = 0;
492 break;
493 case 2:
494 data->fan_div[nr] = 1;
495 break;
496 case 4:
497 data->fan_div[nr] = 2;
498 break;
499 case 8:
500 data->fan_div[nr] = 3;
501 break;
502 default:
503 dev_err(dev,
504 "fan_div value %ld not supported. Choose one of 1, 2, 4 or 8!\n",
505 val);
506 mutex_unlock(&data->update_lock);
507 return -EINVAL;
508 }
509
510 switch (nr) {
511 case 0:
512 reg = (reg & 0xcf) | (data->fan_div[nr] << 4);
513 break;
514 case 1:
515 reg = (reg & 0x3f) | (data->fan_div[nr] << 6);
516 break;
517 }
518 sis5595_write_value(data, SIS5595_REG_FANDIV, reg);
519 data->fan_min[nr] =
520 FAN_TO_REG(min, DIV_FROM_REG(data->fan_div[nr]));
521 sis5595_write_value(data, SIS5595_REG_FAN_MIN(nr), data->fan_min[nr]);
522 mutex_unlock(&data->update_lock);
523 return count;
524}
525
526static SENSOR_DEVICE_ATTR_RO(fan1_input, fan, 0);
527static SENSOR_DEVICE_ATTR_RW(fan1_min, fan_min, 0);
528static SENSOR_DEVICE_ATTR_RW(fan1_div, fan_div, 0);
529static SENSOR_DEVICE_ATTR_RO(fan2_input, fan, 1);
530static SENSOR_DEVICE_ATTR_RW(fan2_min, fan_min, 1);
531static SENSOR_DEVICE_ATTR_RW(fan2_div, fan_div, 1);
532
533/* Alarms */
534static ssize_t alarms_show(struct device *dev, struct device_attribute *attr,
535 char *buf)
536{
537 struct sis5595_data *data = sis5595_update_device(dev);
538 return sprintf(buf, "%d\n", data->alarms);
539}
540static DEVICE_ATTR_RO(alarms);
541
542static ssize_t alarm_show(struct device *dev, struct device_attribute *da,
543 char *buf)
544{
545 struct sis5595_data *data = sis5595_update_device(dev);
546 int nr = to_sensor_dev_attr(da)->index;
547 return sprintf(buf, "%u\n", (data->alarms >> nr) & 1);
548}
549static SENSOR_DEVICE_ATTR_RO(in0_alarm, alarm, 0);
550static SENSOR_DEVICE_ATTR_RO(in1_alarm, alarm, 1);
551static SENSOR_DEVICE_ATTR_RO(in2_alarm, alarm, 2);
552static SENSOR_DEVICE_ATTR_RO(in3_alarm, alarm, 3);
553static SENSOR_DEVICE_ATTR_RO(in4_alarm, alarm, 15);
554static SENSOR_DEVICE_ATTR_RO(fan1_alarm, alarm, 6);
555static SENSOR_DEVICE_ATTR_RO(fan2_alarm, alarm, 7);
556static SENSOR_DEVICE_ATTR_RO(temp1_alarm, alarm, 15);
557
558static ssize_t name_show(struct device *dev, struct device_attribute *attr,
559 char *buf)
560{
561 struct sis5595_data *data = dev_get_drvdata(dev);
562 return sprintf(buf, "%s\n", data->name);
563}
564static DEVICE_ATTR_RO(name);
565
566static struct attribute *sis5595_attributes[] = {
567 &sensor_dev_attr_in0_input.dev_attr.attr,
568 &sensor_dev_attr_in0_min.dev_attr.attr,
569 &sensor_dev_attr_in0_max.dev_attr.attr,
570 &sensor_dev_attr_in0_alarm.dev_attr.attr,
571 &sensor_dev_attr_in1_input.dev_attr.attr,
572 &sensor_dev_attr_in1_min.dev_attr.attr,
573 &sensor_dev_attr_in1_max.dev_attr.attr,
574 &sensor_dev_attr_in1_alarm.dev_attr.attr,
575 &sensor_dev_attr_in2_input.dev_attr.attr,
576 &sensor_dev_attr_in2_min.dev_attr.attr,
577 &sensor_dev_attr_in2_max.dev_attr.attr,
578 &sensor_dev_attr_in2_alarm.dev_attr.attr,
579 &sensor_dev_attr_in3_input.dev_attr.attr,
580 &sensor_dev_attr_in3_min.dev_attr.attr,
581 &sensor_dev_attr_in3_max.dev_attr.attr,
582 &sensor_dev_attr_in3_alarm.dev_attr.attr,
583
584 &sensor_dev_attr_fan1_input.dev_attr.attr,
585 &sensor_dev_attr_fan1_min.dev_attr.attr,
586 &sensor_dev_attr_fan1_div.dev_attr.attr,
587 &sensor_dev_attr_fan1_alarm.dev_attr.attr,
588 &sensor_dev_attr_fan2_input.dev_attr.attr,
589 &sensor_dev_attr_fan2_min.dev_attr.attr,
590 &sensor_dev_attr_fan2_div.dev_attr.attr,
591 &sensor_dev_attr_fan2_alarm.dev_attr.attr,
592
593 &dev_attr_alarms.attr,
594 &dev_attr_name.attr,
595 NULL
596};
597
598static const struct attribute_group sis5595_group = {
599 .attrs = sis5595_attributes,
600};
601
602static struct attribute *sis5595_attributes_in4[] = {
603 &sensor_dev_attr_in4_input.dev_attr.attr,
604 &sensor_dev_attr_in4_min.dev_attr.attr,
605 &sensor_dev_attr_in4_max.dev_attr.attr,
606 &sensor_dev_attr_in4_alarm.dev_attr.attr,
607 NULL
608};
609
610static const struct attribute_group sis5595_group_in4 = {
611 .attrs = sis5595_attributes_in4,
612};
613
614static struct attribute *sis5595_attributes_temp1[] = {
615 &dev_attr_temp1_input.attr,
616 &dev_attr_temp1_max.attr,
617 &dev_attr_temp1_max_hyst.attr,
618 &sensor_dev_attr_temp1_alarm.dev_attr.attr,
619 NULL
620};
621
622static const struct attribute_group sis5595_group_temp1 = {
623 .attrs = sis5595_attributes_temp1,
624};
625
626/* Called when we have found a new SIS5595. */
627static void sis5595_init_device(struct sis5595_data *data)
628{
629 u8 config = sis5595_read_value(data, SIS5595_REG_CONFIG);
630 if (!(config & 0x01))
631 sis5595_write_value(data, SIS5595_REG_CONFIG,
632 (config & 0xf7) | 0x01);
633}
634
635/* This is called when the module is loaded */
636static int sis5595_probe(struct platform_device *pdev)
637{
638 int err = 0;
639 int i;
640 struct sis5595_data *data;
641 struct resource *res;
642 char val;
643
644 /* Reserve the ISA region */
645 res = platform_get_resource(pdev, IORESOURCE_IO, 0);
646 if (!devm_request_region(&pdev->dev, res->start, SIS5595_EXTENT,
647 DRIVER_NAME))
648 return -EBUSY;
649
650 data = devm_kzalloc(&pdev->dev, sizeof(struct sis5595_data),
651 GFP_KERNEL);
652 if (!data)
653 return -ENOMEM;
654
655 mutex_init(&data->lock);
656 mutex_init(&data->update_lock);
657 data->addr = res->start;
658 data->name = DRIVER_NAME;
659 platform_set_drvdata(pdev, data);
660
661 /*
662 * Check revision and pin registers to determine whether 4 or 5 voltages
663 */
664 data->revision = s_bridge->revision;
665 /* 4 voltages, 1 temp */
666 data->maxins = 3;
667 if (data->revision >= REV2MIN) {
668 pci_read_config_byte(s_bridge, SIS5595_PIN_REG, &val);
669 if (!(val & 0x80))
670 /* 5 voltages, no temps */
671 data->maxins = 4;
672 }
673
674 /* Initialize the SIS5595 chip */
675 sis5595_init_device(data);
676
677 /* A few vars need to be filled upon startup */
678 for (i = 0; i < 2; i++) {
679 data->fan_min[i] = sis5595_read_value(data,
680 SIS5595_REG_FAN_MIN(i));
681 }
682
683 /* Register sysfs hooks */
684 err = sysfs_create_group(&pdev->dev.kobj, &sis5595_group);
685 if (err)
686 return err;
687 if (data->maxins == 4) {
688 err = sysfs_create_group(&pdev->dev.kobj, &sis5595_group_in4);
689 if (err)
690 goto exit_remove_files;
691 } else {
692 err = sysfs_create_group(&pdev->dev.kobj, &sis5595_group_temp1);
693 if (err)
694 goto exit_remove_files;
695 }
696
697 data->hwmon_dev = hwmon_device_register(&pdev->dev);
698 if (IS_ERR(data->hwmon_dev)) {
699 err = PTR_ERR(data->hwmon_dev);
700 goto exit_remove_files;
701 }
702
703 return 0;
704
705exit_remove_files:
706 sysfs_remove_group(&pdev->dev.kobj, &sis5595_group);
707 sysfs_remove_group(&pdev->dev.kobj, &sis5595_group_in4);
708 sysfs_remove_group(&pdev->dev.kobj, &sis5595_group_temp1);
709 return err;
710}
711
712static int sis5595_remove(struct platform_device *pdev)
713{
714 struct sis5595_data *data = platform_get_drvdata(pdev);
715
716 hwmon_device_unregister(data->hwmon_dev);
717 sysfs_remove_group(&pdev->dev.kobj, &sis5595_group);
718 sysfs_remove_group(&pdev->dev.kobj, &sis5595_group_in4);
719 sysfs_remove_group(&pdev->dev.kobj, &sis5595_group_temp1);
720
721 return 0;
722}
723
724static const struct pci_device_id sis5595_pci_ids[] = {
725 { PCI_DEVICE(PCI_VENDOR_ID_SI, PCI_DEVICE_ID_SI_503) },
726 { 0, }
727};
728
729MODULE_DEVICE_TABLE(pci, sis5595_pci_ids);
730
731static int blacklist[] = {
732 PCI_DEVICE_ID_SI_540,
733 PCI_DEVICE_ID_SI_550,
734 PCI_DEVICE_ID_SI_630,
735 PCI_DEVICE_ID_SI_645,
736 PCI_DEVICE_ID_SI_730,
737 PCI_DEVICE_ID_SI_735,
738 PCI_DEVICE_ID_SI_5511, /*
739 * 5513 chip has the 0008 device but
740 * that ID shows up in other chips so we
741 * use the 5511 ID for recognition
742 */
743 PCI_DEVICE_ID_SI_5597,
744 PCI_DEVICE_ID_SI_5598,
745 0 };
746
747static int sis5595_device_add(unsigned short address)
748{
749 struct resource res = {
750 .start = address,
751 .end = address + SIS5595_EXTENT - 1,
752 .name = DRIVER_NAME,
753 .flags = IORESOURCE_IO,
754 };
755 int err;
756
757 err = acpi_check_resource_conflict(&res);
758 if (err)
759 goto exit;
760
761 pdev = platform_device_alloc(DRIVER_NAME, address);
762 if (!pdev) {
763 err = -ENOMEM;
764 pr_err("Device allocation failed\n");
765 goto exit;
766 }
767
768 err = platform_device_add_resources(pdev, &res, 1);
769 if (err) {
770 pr_err("Device resource addition failed (%d)\n", err);
771 goto exit_device_put;
772 }
773
774 err = platform_device_add(pdev);
775 if (err) {
776 pr_err("Device addition failed (%d)\n", err);
777 goto exit_device_put;
778 }
779
780 return 0;
781
782exit_device_put:
783 platform_device_put(pdev);
784exit:
785 return err;
786}
787
788static struct platform_driver sis5595_driver = {
789 .driver = {
790 .name = DRIVER_NAME,
791 },
792 .probe = sis5595_probe,
793 .remove = sis5595_remove,
794};
795
796static int sis5595_pci_probe(struct pci_dev *dev,
797 const struct pci_device_id *id)
798{
799 u16 address;
800 u8 enable;
801 int *i;
802
803 for (i = blacklist; *i != 0; i++) {
804 struct pci_dev *d;
805 d = pci_get_device(PCI_VENDOR_ID_SI, *i, NULL);
806 if (d) {
807 dev_err(&d->dev,
808 "Looked for SIS5595 but found unsupported device %.4x\n",
809 *i);
810 pci_dev_put(d);
811 return -ENODEV;
812 }
813 }
814
815 force_addr &= ~(SIS5595_EXTENT - 1);
816 if (force_addr) {
817 dev_warn(&dev->dev, "Forcing ISA address 0x%x\n", force_addr);
818 pci_write_config_word(dev, SIS5595_BASE_REG, force_addr);
819 }
820
821 if (PCIBIOS_SUCCESSFUL !=
822 pci_read_config_word(dev, SIS5595_BASE_REG, &address)) {
823 dev_err(&dev->dev, "Failed to read ISA address\n");
824 return -ENODEV;
825 }
826
827 address &= ~(SIS5595_EXTENT - 1);
828 if (!address) {
829 dev_err(&dev->dev,
830 "Base address not set - upgrade BIOS or use force_addr=0xaddr\n");
831 return -ENODEV;
832 }
833 if (force_addr && address != force_addr) {
834 /* doesn't work for some chips? */
835 dev_err(&dev->dev, "Failed to force ISA address\n");
836 return -ENODEV;
837 }
838
839 if (PCIBIOS_SUCCESSFUL !=
840 pci_read_config_byte(dev, SIS5595_ENABLE_REG, &enable)) {
841 dev_err(&dev->dev, "Failed to read enable register\n");
842 return -ENODEV;
843 }
844 if (!(enable & 0x80)) {
845 if ((PCIBIOS_SUCCESSFUL !=
846 pci_write_config_byte(dev, SIS5595_ENABLE_REG,
847 enable | 0x80))
848 || (PCIBIOS_SUCCESSFUL !=
849 pci_read_config_byte(dev, SIS5595_ENABLE_REG, &enable))
850 || (!(enable & 0x80))) {
851 /* doesn't work for some chips! */
852 dev_err(&dev->dev, "Failed to enable HWM device\n");
853 return -ENODEV;
854 }
855 }
856
857 if (platform_driver_register(&sis5595_driver)) {
858 dev_dbg(&dev->dev, "Failed to register sis5595 driver\n");
859 goto exit;
860 }
861
862 s_bridge = pci_dev_get(dev);
863 /* Sets global pdev as a side effect */
864 if (sis5595_device_add(address))
865 goto exit_unregister;
866
867 /*
868 * Always return failure here. This is to allow other drivers to bind
869 * to this pci device. We don't really want to have control over the
870 * pci device, we only wanted to read as few register values from it.
871 */
872 return -ENODEV;
873
874exit_unregister:
875 pci_dev_put(dev);
876 platform_driver_unregister(&sis5595_driver);
877exit:
878 return -ENODEV;
879}
880
881static struct pci_driver sis5595_pci_driver = {
882 .name = DRIVER_NAME,
883 .id_table = sis5595_pci_ids,
884 .probe = sis5595_pci_probe,
885};
886
887static int __init sm_sis5595_init(void)
888{
889 return pci_register_driver(&sis5595_pci_driver);
890}
891
892static void __exit sm_sis5595_exit(void)
893{
894 pci_unregister_driver(&sis5595_pci_driver);
895 if (s_bridge != NULL) {
896 platform_device_unregister(pdev);
897 platform_driver_unregister(&sis5595_driver);
898 pci_dev_put(s_bridge);
899 s_bridge = NULL;
900 }
901}
902
903MODULE_AUTHOR("Aurelien Jarno <aurelien@aurel32.net>");
904MODULE_DESCRIPTION("SiS 5595 Sensor device");
905MODULE_LICENSE("GPL");
906
907module_init(sm_sis5595_init);
908module_exit(sm_sis5595_exit);