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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
157 * REG: 0, 1, 2, or 3 (respectively)
158 */
159#define DIV_FROM_REG(val) (1 << (val))
160
161/*
162 * For each registered chip, we need to keep some data in memory.
163 * The structure is dynamically allocated.
164 */
165struct sis5595_data {
166 unsigned short addr;
167 const char *name;
168 struct device *hwmon_dev;
169 struct mutex lock;
170
171 struct mutex update_lock;
172 bool valid; /* true if following fields are valid */
173 unsigned long last_updated; /* In jiffies */
174 char maxins; /* == 3 if temp enabled, otherwise == 4 */
175 u8 revision; /* Reg. value */
176
177 u8 in[5]; /* Register value */
178 u8 in_max[5]; /* Register value */
179 u8 in_min[5]; /* Register value */
180 u8 fan[2]; /* Register value */
181 u8 fan_min[2]; /* Register value */
182 s8 temp; /* Register value */
183 s8 temp_over; /* Register value */
184 s8 temp_hyst; /* Register value */
185 u8 fan_div[2]; /* Register encoding, shifted right */
186 u16 alarms; /* Register encoding, combined */
187};
188
189static struct pci_dev *s_bridge; /* pointer to the (only) sis5595 */
190
191/* ISA access must be locked explicitly. */
192static int sis5595_read_value(struct sis5595_data *data, u8 reg)
193{
194 int res;
195
196 mutex_lock(&data->lock);
197 outb_p(reg, data->addr + SIS5595_ADDR_REG_OFFSET);
198 res = inb_p(data->addr + SIS5595_DATA_REG_OFFSET);
199 mutex_unlock(&data->lock);
200 return res;
201}
202
203static void sis5595_write_value(struct sis5595_data *data, u8 reg, u8 value)
204{
205 mutex_lock(&data->lock);
206 outb_p(reg, data->addr + SIS5595_ADDR_REG_OFFSET);
207 outb_p(value, data->addr + SIS5595_DATA_REG_OFFSET);
208 mutex_unlock(&data->lock);
209}
210
211static struct sis5595_data *sis5595_update_device(struct device *dev)
212{
213 struct sis5595_data *data = dev_get_drvdata(dev);
214 int i;
215
216 mutex_lock(&data->update_lock);
217
218 if (time_after(jiffies, data->last_updated + HZ + HZ / 2)
219 || !data->valid) {
220
221 for (i = 0; i <= data->maxins; i++) {
222 data->in[i] =
223 sis5595_read_value(data, SIS5595_REG_IN(i));
224 data->in_min[i] =
225 sis5595_read_value(data,
226 SIS5595_REG_IN_MIN(i));
227 data->in_max[i] =
228 sis5595_read_value(data,
229 SIS5595_REG_IN_MAX(i));
230 }
231 for (i = 0; i < 2; i++) {
232 data->fan[i] =
233 sis5595_read_value(data, SIS5595_REG_FAN(i));
234 data->fan_min[i] =
235 sis5595_read_value(data,
236 SIS5595_REG_FAN_MIN(i));
237 }
238 if (data->maxins == 3) {
239 data->temp =
240 sis5595_read_value(data, SIS5595_REG_TEMP);
241 data->temp_over =
242 sis5595_read_value(data, SIS5595_REG_TEMP_OVER);
243 data->temp_hyst =
244 sis5595_read_value(data, SIS5595_REG_TEMP_HYST);
245 }
246 i = sis5595_read_value(data, SIS5595_REG_FANDIV);
247 data->fan_div[0] = (i >> 4) & 0x03;
248 data->fan_div[1] = i >> 6;
249 data->alarms =
250 sis5595_read_value(data, SIS5595_REG_ALARM1) |
251 (sis5595_read_value(data, SIS5595_REG_ALARM2) << 8);
252 data->last_updated = jiffies;
253 data->valid = true;
254 }
255
256 mutex_unlock(&data->update_lock);
257
258 return data;
259}
260
261/* 4 Voltages */
262static ssize_t in_show(struct device *dev, struct device_attribute *da,
263 char *buf)
264{
265 struct sis5595_data *data = sis5595_update_device(dev);
266 struct sensor_device_attribute *attr = to_sensor_dev_attr(da);
267 int nr = attr->index;
268 return sprintf(buf, "%d\n", IN_FROM_REG(data->in[nr]));
269}
270
271static ssize_t in_min_show(struct device *dev, struct device_attribute *da,
272 char *buf)
273{
274 struct sis5595_data *data = sis5595_update_device(dev);
275 struct sensor_device_attribute *attr = to_sensor_dev_attr(da);
276 int nr = attr->index;
277 return sprintf(buf, "%d\n", IN_FROM_REG(data->in_min[nr]));
278}
279
280static ssize_t in_max_show(struct device *dev, struct device_attribute *da,
281 char *buf)
282{
283 struct sis5595_data *data = sis5595_update_device(dev);
284 struct sensor_device_attribute *attr = to_sensor_dev_attr(da);
285 int nr = attr->index;
286 return sprintf(buf, "%d\n", IN_FROM_REG(data->in_max[nr]));
287}
288
289static ssize_t in_min_store(struct device *dev, struct device_attribute *da,
290 const char *buf, size_t count)
291{
292 struct sis5595_data *data = dev_get_drvdata(dev);
293 struct sensor_device_attribute *attr = to_sensor_dev_attr(da);
294 int nr = attr->index;
295 unsigned long val;
296 int err;
297
298 err = kstrtoul(buf, 10, &val);
299 if (err)
300 return err;
301
302 mutex_lock(&data->update_lock);
303 data->in_min[nr] = IN_TO_REG(val);
304 sis5595_write_value(data, SIS5595_REG_IN_MIN(nr), data->in_min[nr]);
305 mutex_unlock(&data->update_lock);
306 return count;
307}
308
309static ssize_t in_max_store(struct device *dev, struct device_attribute *da,
310 const char *buf, size_t count)
311{
312 struct sis5595_data *data = dev_get_drvdata(dev);
313 struct sensor_device_attribute *attr = to_sensor_dev_attr(da);
314 int nr = attr->index;
315 unsigned long val;
316 int err;
317
318 err = kstrtoul(buf, 10, &val);
319 if (err)
320 return err;
321
322 mutex_lock(&data->update_lock);
323 data->in_max[nr] = IN_TO_REG(val);
324 sis5595_write_value(data, SIS5595_REG_IN_MAX(nr), data->in_max[nr]);
325 mutex_unlock(&data->update_lock);
326 return count;
327}
328
329static SENSOR_DEVICE_ATTR_RO(in0_input, in, 0);
330static SENSOR_DEVICE_ATTR_RW(in0_min, in_min, 0);
331static SENSOR_DEVICE_ATTR_RW(in0_max, in_max, 0);
332static SENSOR_DEVICE_ATTR_RO(in1_input, in, 1);
333static SENSOR_DEVICE_ATTR_RW(in1_min, in_min, 1);
334static SENSOR_DEVICE_ATTR_RW(in1_max, in_max, 1);
335static SENSOR_DEVICE_ATTR_RO(in2_input, in, 2);
336static SENSOR_DEVICE_ATTR_RW(in2_min, in_min, 2);
337static SENSOR_DEVICE_ATTR_RW(in2_max, in_max, 2);
338static SENSOR_DEVICE_ATTR_RO(in3_input, in, 3);
339static SENSOR_DEVICE_ATTR_RW(in3_min, in_min, 3);
340static SENSOR_DEVICE_ATTR_RW(in3_max, in_max, 3);
341static SENSOR_DEVICE_ATTR_RO(in4_input, in, 4);
342static SENSOR_DEVICE_ATTR_RW(in4_min, in_min, 4);
343static SENSOR_DEVICE_ATTR_RW(in4_max, in_max, 4);
344
345/* Temperature */
346static ssize_t temp1_input_show(struct device *dev,
347 struct device_attribute *attr, char *buf)
348{
349 struct sis5595_data *data = sis5595_update_device(dev);
350 return sprintf(buf, "%d\n", TEMP_FROM_REG(data->temp));
351}
352
353static ssize_t temp1_max_show(struct device *dev, struct device_attribute *attr,
354 char *buf)
355{
356 struct sis5595_data *data = sis5595_update_device(dev);
357 return sprintf(buf, "%d\n", TEMP_FROM_REG(data->temp_over));
358}
359
360static ssize_t temp1_max_store(struct device *dev,
361 struct device_attribute *attr, const char *buf,
362 size_t count)
363{
364 struct sis5595_data *data = dev_get_drvdata(dev);
365 long val;
366 int err;
367
368 err = kstrtol(buf, 10, &val);
369 if (err)
370 return err;
371
372 mutex_lock(&data->update_lock);
373 data->temp_over = TEMP_TO_REG(val);
374 sis5595_write_value(data, SIS5595_REG_TEMP_OVER, data->temp_over);
375 mutex_unlock(&data->update_lock);
376 return count;
377}
378
379static ssize_t temp1_max_hyst_show(struct device *dev,
380 struct device_attribute *attr, char *buf)
381{
382 struct sis5595_data *data = sis5595_update_device(dev);
383 return sprintf(buf, "%d\n", TEMP_FROM_REG(data->temp_hyst));
384}
385
386static ssize_t temp1_max_hyst_store(struct device *dev,
387 struct device_attribute *attr,
388 const char *buf, size_t count)
389{
390 struct sis5595_data *data = dev_get_drvdata(dev);
391 long val;
392 int err;
393
394 err = kstrtol(buf, 10, &val);
395 if (err)
396 return err;
397
398 mutex_lock(&data->update_lock);
399 data->temp_hyst = TEMP_TO_REG(val);
400 sis5595_write_value(data, SIS5595_REG_TEMP_HYST, data->temp_hyst);
401 mutex_unlock(&data->update_lock);
402 return count;
403}
404
405static DEVICE_ATTR_RO(temp1_input);
406static DEVICE_ATTR_RW(temp1_max);
407static DEVICE_ATTR_RW(temp1_max_hyst);
408
409/* 2 Fans */
410static ssize_t fan_show(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", FAN_FROM_REG(data->fan[nr],
417 DIV_FROM_REG(data->fan_div[nr])));
418}
419
420static ssize_t fan_min_show(struct device *dev, struct device_attribute *da,
421 char *buf)
422{
423 struct sis5595_data *data = sis5595_update_device(dev);
424 struct sensor_device_attribute *attr = to_sensor_dev_attr(da);
425 int nr = attr->index;
426 return sprintf(buf, "%d\n", FAN_FROM_REG(data->fan_min[nr],
427 DIV_FROM_REG(data->fan_div[nr])));
428}
429
430static ssize_t fan_min_store(struct device *dev, struct device_attribute *da,
431 const char *buf, size_t count)
432{
433 struct sis5595_data *data = dev_get_drvdata(dev);
434 struct sensor_device_attribute *attr = to_sensor_dev_attr(da);
435 int nr = attr->index;
436 unsigned long val;
437 int err;
438
439 err = kstrtoul(buf, 10, &val);
440 if (err)
441 return err;
442
443 mutex_lock(&data->update_lock);
444 data->fan_min[nr] = FAN_TO_REG(val, DIV_FROM_REG(data->fan_div[nr]));
445 sis5595_write_value(data, SIS5595_REG_FAN_MIN(nr), data->fan_min[nr]);
446 mutex_unlock(&data->update_lock);
447 return count;
448}
449
450static ssize_t fan_div_show(struct device *dev, struct device_attribute *da,
451 char *buf)
452{
453 struct sis5595_data *data = sis5595_update_device(dev);
454 struct sensor_device_attribute *attr = to_sensor_dev_attr(da);
455 int nr = attr->index;
456 return sprintf(buf, "%d\n", DIV_FROM_REG(data->fan_div[nr]));
457}
458
459/*
460 * Note: we save and restore the fan minimum here, because its value is
461 * determined in part by the fan divisor. This follows the principle of
462 * least surprise; the user doesn't expect the fan minimum to change just
463 * because the divisor changed.
464 */
465static ssize_t fan_div_store(struct device *dev, struct device_attribute *da,
466 const char *buf, size_t count)
467{
468 struct sis5595_data *data = dev_get_drvdata(dev);
469 struct sensor_device_attribute *attr = to_sensor_dev_attr(da);
470 int nr = attr->index;
471 unsigned long min;
472 int reg;
473 unsigned long val;
474 int err;
475
476 err = kstrtoul(buf, 10, &val);
477 if (err)
478 return err;
479
480 mutex_lock(&data->update_lock);
481 min = FAN_FROM_REG(data->fan_min[nr],
482 DIV_FROM_REG(data->fan_div[nr]));
483 reg = sis5595_read_value(data, SIS5595_REG_FANDIV);
484
485 switch (val) {
486 case 1:
487 data->fan_div[nr] = 0;
488 break;
489 case 2:
490 data->fan_div[nr] = 1;
491 break;
492 case 4:
493 data->fan_div[nr] = 2;
494 break;
495 case 8:
496 data->fan_div[nr] = 3;
497 break;
498 default:
499 dev_err(dev,
500 "fan_div value %ld not supported. Choose one of 1, 2, 4 or 8!\n",
501 val);
502 mutex_unlock(&data->update_lock);
503 return -EINVAL;
504 }
505
506 switch (nr) {
507 case 0:
508 reg = (reg & 0xcf) | (data->fan_div[nr] << 4);
509 break;
510 case 1:
511 reg = (reg & 0x3f) | (data->fan_div[nr] << 6);
512 break;
513 }
514 sis5595_write_value(data, SIS5595_REG_FANDIV, reg);
515 data->fan_min[nr] =
516 FAN_TO_REG(min, DIV_FROM_REG(data->fan_div[nr]));
517 sis5595_write_value(data, SIS5595_REG_FAN_MIN(nr), data->fan_min[nr]);
518 mutex_unlock(&data->update_lock);
519 return count;
520}
521
522static SENSOR_DEVICE_ATTR_RO(fan1_input, fan, 0);
523static SENSOR_DEVICE_ATTR_RW(fan1_min, fan_min, 0);
524static SENSOR_DEVICE_ATTR_RW(fan1_div, fan_div, 0);
525static SENSOR_DEVICE_ATTR_RO(fan2_input, fan, 1);
526static SENSOR_DEVICE_ATTR_RW(fan2_min, fan_min, 1);
527static SENSOR_DEVICE_ATTR_RW(fan2_div, fan_div, 1);
528
529/* Alarms */
530static ssize_t alarms_show(struct device *dev, struct device_attribute *attr,
531 char *buf)
532{
533 struct sis5595_data *data = sis5595_update_device(dev);
534 return sprintf(buf, "%d\n", data->alarms);
535}
536static DEVICE_ATTR_RO(alarms);
537
538static ssize_t alarm_show(struct device *dev, struct device_attribute *da,
539 char *buf)
540{
541 struct sis5595_data *data = sis5595_update_device(dev);
542 int nr = to_sensor_dev_attr(da)->index;
543 return sprintf(buf, "%u\n", (data->alarms >> nr) & 1);
544}
545static SENSOR_DEVICE_ATTR_RO(in0_alarm, alarm, 0);
546static SENSOR_DEVICE_ATTR_RO(in1_alarm, alarm, 1);
547static SENSOR_DEVICE_ATTR_RO(in2_alarm, alarm, 2);
548static SENSOR_DEVICE_ATTR_RO(in3_alarm, alarm, 3);
549static SENSOR_DEVICE_ATTR_RO(in4_alarm, alarm, 15);
550static SENSOR_DEVICE_ATTR_RO(fan1_alarm, alarm, 6);
551static SENSOR_DEVICE_ATTR_RO(fan2_alarm, alarm, 7);
552static SENSOR_DEVICE_ATTR_RO(temp1_alarm, alarm, 15);
553
554static ssize_t name_show(struct device *dev, struct device_attribute *attr,
555 char *buf)
556{
557 struct sis5595_data *data = dev_get_drvdata(dev);
558 return sprintf(buf, "%s\n", data->name);
559}
560static DEVICE_ATTR_RO(name);
561
562static struct attribute *sis5595_attributes[] = {
563 &sensor_dev_attr_in0_input.dev_attr.attr,
564 &sensor_dev_attr_in0_min.dev_attr.attr,
565 &sensor_dev_attr_in0_max.dev_attr.attr,
566 &sensor_dev_attr_in0_alarm.dev_attr.attr,
567 &sensor_dev_attr_in1_input.dev_attr.attr,
568 &sensor_dev_attr_in1_min.dev_attr.attr,
569 &sensor_dev_attr_in1_max.dev_attr.attr,
570 &sensor_dev_attr_in1_alarm.dev_attr.attr,
571 &sensor_dev_attr_in2_input.dev_attr.attr,
572 &sensor_dev_attr_in2_min.dev_attr.attr,
573 &sensor_dev_attr_in2_max.dev_attr.attr,
574 &sensor_dev_attr_in2_alarm.dev_attr.attr,
575 &sensor_dev_attr_in3_input.dev_attr.attr,
576 &sensor_dev_attr_in3_min.dev_attr.attr,
577 &sensor_dev_attr_in3_max.dev_attr.attr,
578 &sensor_dev_attr_in3_alarm.dev_attr.attr,
579
580 &sensor_dev_attr_fan1_input.dev_attr.attr,
581 &sensor_dev_attr_fan1_min.dev_attr.attr,
582 &sensor_dev_attr_fan1_div.dev_attr.attr,
583 &sensor_dev_attr_fan1_alarm.dev_attr.attr,
584 &sensor_dev_attr_fan2_input.dev_attr.attr,
585 &sensor_dev_attr_fan2_min.dev_attr.attr,
586 &sensor_dev_attr_fan2_div.dev_attr.attr,
587 &sensor_dev_attr_fan2_alarm.dev_attr.attr,
588
589 &dev_attr_alarms.attr,
590 &dev_attr_name.attr,
591 NULL
592};
593
594static const struct attribute_group sis5595_group = {
595 .attrs = sis5595_attributes,
596};
597
598static struct attribute *sis5595_attributes_in4[] = {
599 &sensor_dev_attr_in4_input.dev_attr.attr,
600 &sensor_dev_attr_in4_min.dev_attr.attr,
601 &sensor_dev_attr_in4_max.dev_attr.attr,
602 &sensor_dev_attr_in4_alarm.dev_attr.attr,
603 NULL
604};
605
606static const struct attribute_group sis5595_group_in4 = {
607 .attrs = sis5595_attributes_in4,
608};
609
610static struct attribute *sis5595_attributes_temp1[] = {
611 &dev_attr_temp1_input.attr,
612 &dev_attr_temp1_max.attr,
613 &dev_attr_temp1_max_hyst.attr,
614 &sensor_dev_attr_temp1_alarm.dev_attr.attr,
615 NULL
616};
617
618static const struct attribute_group sis5595_group_temp1 = {
619 .attrs = sis5595_attributes_temp1,
620};
621
622/* Called when we have found a new SIS5595. */
623static void sis5595_init_device(struct sis5595_data *data)
624{
625 u8 config = sis5595_read_value(data, SIS5595_REG_CONFIG);
626 if (!(config & 0x01))
627 sis5595_write_value(data, SIS5595_REG_CONFIG,
628 (config & 0xf7) | 0x01);
629}
630
631/* This is called when the module is loaded */
632static int sis5595_probe(struct platform_device *pdev)
633{
634 int err = 0;
635 int i;
636 struct sis5595_data *data;
637 struct resource *res;
638 char val;
639
640 /* Reserve the ISA region */
641 res = platform_get_resource(pdev, IORESOURCE_IO, 0);
642 if (!devm_request_region(&pdev->dev, res->start, SIS5595_EXTENT,
643 DRIVER_NAME))
644 return -EBUSY;
645
646 data = devm_kzalloc(&pdev->dev, sizeof(struct sis5595_data),
647 GFP_KERNEL);
648 if (!data)
649 return -ENOMEM;
650
651 mutex_init(&data->lock);
652 mutex_init(&data->update_lock);
653 data->addr = res->start;
654 data->name = DRIVER_NAME;
655 platform_set_drvdata(pdev, data);
656
657 /*
658 * Check revision and pin registers to determine whether 4 or 5 voltages
659 */
660 data->revision = s_bridge->revision;
661 /* 4 voltages, 1 temp */
662 data->maxins = 3;
663 if (data->revision >= REV2MIN) {
664 pci_read_config_byte(s_bridge, SIS5595_PIN_REG, &val);
665 if (!(val & 0x80))
666 /* 5 voltages, no temps */
667 data->maxins = 4;
668 }
669
670 /* Initialize the SIS5595 chip */
671 sis5595_init_device(data);
672
673 /* A few vars need to be filled upon startup */
674 for (i = 0; i < 2; i++) {
675 data->fan_min[i] = sis5595_read_value(data,
676 SIS5595_REG_FAN_MIN(i));
677 }
678
679 /* Register sysfs hooks */
680 err = sysfs_create_group(&pdev->dev.kobj, &sis5595_group);
681 if (err)
682 return err;
683 if (data->maxins == 4) {
684 err = sysfs_create_group(&pdev->dev.kobj, &sis5595_group_in4);
685 if (err)
686 goto exit_remove_files;
687 } else {
688 err = sysfs_create_group(&pdev->dev.kobj, &sis5595_group_temp1);
689 if (err)
690 goto exit_remove_files;
691 }
692
693 data->hwmon_dev = hwmon_device_register(&pdev->dev);
694 if (IS_ERR(data->hwmon_dev)) {
695 err = PTR_ERR(data->hwmon_dev);
696 goto exit_remove_files;
697 }
698
699 return 0;
700
701exit_remove_files:
702 sysfs_remove_group(&pdev->dev.kobj, &sis5595_group);
703 sysfs_remove_group(&pdev->dev.kobj, &sis5595_group_in4);
704 sysfs_remove_group(&pdev->dev.kobj, &sis5595_group_temp1);
705 return err;
706}
707
708static void sis5595_remove(struct platform_device *pdev)
709{
710 struct sis5595_data *data = platform_get_drvdata(pdev);
711
712 hwmon_device_unregister(data->hwmon_dev);
713 sysfs_remove_group(&pdev->dev.kobj, &sis5595_group);
714 sysfs_remove_group(&pdev->dev.kobj, &sis5595_group_in4);
715 sysfs_remove_group(&pdev->dev.kobj, &sis5595_group_temp1);
716}
717
718static const struct pci_device_id sis5595_pci_ids[] = {
719 { PCI_DEVICE(PCI_VENDOR_ID_SI, PCI_DEVICE_ID_SI_503) },
720 { 0, }
721};
722
723MODULE_DEVICE_TABLE(pci, sis5595_pci_ids);
724
725static int blacklist[] = {
726 PCI_DEVICE_ID_SI_540,
727 PCI_DEVICE_ID_SI_550,
728 PCI_DEVICE_ID_SI_630,
729 PCI_DEVICE_ID_SI_645,
730 PCI_DEVICE_ID_SI_730,
731 PCI_DEVICE_ID_SI_735,
732 PCI_DEVICE_ID_SI_5511, /*
733 * 5513 chip has the 0008 device but
734 * that ID shows up in other chips so we
735 * use the 5511 ID for recognition
736 */
737 PCI_DEVICE_ID_SI_5597,
738 PCI_DEVICE_ID_SI_5598,
739 0 };
740
741static int sis5595_device_add(unsigned short address)
742{
743 struct resource res = {
744 .start = address,
745 .end = address + SIS5595_EXTENT - 1,
746 .name = DRIVER_NAME,
747 .flags = IORESOURCE_IO,
748 };
749 int err;
750
751 err = acpi_check_resource_conflict(&res);
752 if (err)
753 goto exit;
754
755 pdev = platform_device_alloc(DRIVER_NAME, address);
756 if (!pdev) {
757 err = -ENOMEM;
758 pr_err("Device allocation failed\n");
759 goto exit;
760 }
761
762 err = platform_device_add_resources(pdev, &res, 1);
763 if (err) {
764 pr_err("Device resource addition failed (%d)\n", err);
765 goto exit_device_put;
766 }
767
768 err = platform_device_add(pdev);
769 if (err) {
770 pr_err("Device addition failed (%d)\n", err);
771 goto exit_device_put;
772 }
773
774 return 0;
775
776exit_device_put:
777 platform_device_put(pdev);
778exit:
779 return err;
780}
781
782static struct platform_driver sis5595_driver = {
783 .driver = {
784 .name = DRIVER_NAME,
785 },
786 .probe = sis5595_probe,
787 .remove_new = sis5595_remove,
788};
789
790static int sis5595_pci_probe(struct pci_dev *dev,
791 const struct pci_device_id *id)
792{
793 u16 address;
794 u8 enable;
795 int *i, err;
796
797 for (i = blacklist; *i != 0; i++) {
798 struct pci_dev *d;
799 d = pci_get_device(PCI_VENDOR_ID_SI, *i, NULL);
800 if (d) {
801 dev_err(&d->dev,
802 "Looked for SIS5595 but found unsupported device %.4x\n",
803 *i);
804 pci_dev_put(d);
805 return -ENODEV;
806 }
807 }
808
809 force_addr &= ~(SIS5595_EXTENT - 1);
810 if (force_addr) {
811 dev_warn(&dev->dev, "Forcing ISA address 0x%x\n", force_addr);
812 pci_write_config_word(dev, SIS5595_BASE_REG, force_addr);
813 }
814
815 err = pci_read_config_word(dev, SIS5595_BASE_REG, &address);
816 if (err != PCIBIOS_SUCCESSFUL) {
817 dev_err(&dev->dev, "Failed to read ISA address\n");
818 return -ENODEV;
819 }
820
821 address &= ~(SIS5595_EXTENT - 1);
822 if (!address) {
823 dev_err(&dev->dev,
824 "Base address not set - upgrade BIOS or use force_addr=0xaddr\n");
825 return -ENODEV;
826 }
827 if (force_addr && address != force_addr) {
828 /* doesn't work for some chips? */
829 dev_err(&dev->dev, "Failed to force ISA address\n");
830 return -ENODEV;
831 }
832
833 err = pci_read_config_byte(dev, SIS5595_ENABLE_REG, &enable);
834 if (err != PCIBIOS_SUCCESSFUL) {
835 dev_err(&dev->dev, "Failed to read enable register\n");
836 return -ENODEV;
837 }
838 if (!(enable & 0x80)) {
839 err = pci_write_config_byte(dev, SIS5595_ENABLE_REG, enable | 0x80);
840 if (err != PCIBIOS_SUCCESSFUL)
841 goto enable_fail;
842
843 err = pci_read_config_byte(dev, SIS5595_ENABLE_REG, &enable);
844 if (err != PCIBIOS_SUCCESSFUL)
845 goto enable_fail;
846
847 /* doesn't work for some chips! */
848 if (!(enable & 0x80))
849 goto enable_fail;
850 }
851
852 if (platform_driver_register(&sis5595_driver)) {
853 dev_dbg(&dev->dev, "Failed to register sis5595 driver\n");
854 goto exit;
855 }
856
857 s_bridge = pci_dev_get(dev);
858 /* Sets global pdev as a side effect */
859 if (sis5595_device_add(address))
860 goto exit_unregister;
861
862 /*
863 * Always return failure here. This is to allow other drivers to bind
864 * to this pci device. We don't really want to have control over the
865 * pci device, we only wanted to read as few register values from it.
866 */
867 return -ENODEV;
868
869enable_fail:
870 dev_err(&dev->dev, "Failed to enable HWM device\n");
871 goto exit;
872
873exit_unregister:
874 pci_dev_put(dev);
875 platform_driver_unregister(&sis5595_driver);
876exit:
877 return -ENODEV;
878}
879
880static struct pci_driver sis5595_pci_driver = {
881 .name = DRIVER_NAME,
882 .id_table = sis5595_pci_ids,
883 .probe = sis5595_pci_probe,
884};
885
886static int __init sm_sis5595_init(void)
887{
888 return pci_register_driver(&sis5595_pci_driver);
889}
890
891static void __exit sm_sis5595_exit(void)
892{
893 pci_unregister_driver(&sis5595_pci_driver);
894 if (s_bridge != NULL) {
895 platform_device_unregister(pdev);
896 platform_driver_unregister(&sis5595_driver);
897 pci_dev_put(s_bridge);
898 s_bridge = NULL;
899 }
900}
901
902MODULE_AUTHOR("Aurelien Jarno <aurelien@aurel32.net>");
903MODULE_DESCRIPTION("SiS 5595 Sensor device");
904MODULE_LICENSE("GPL");
905
906module_init(sm_sis5595_init);
907module_exit(sm_sis5595_exit);