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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 pr_fmt(fmt) KBUILD_MODNAME ": " fmt
41
42#include <linux/module.h>
43#include <linux/slab.h>
44#include <linux/ioport.h>
45#include <linux/pci.h>
46#include <linux/platform_device.h>
47#include <linux/hwmon.h>
48#include <linux/hwmon-sysfs.h>
49#include <linux/err.h>
50#include <linux/init.h>
51#include <linux/jiffies.h>
52#include <linux/mutex.h>
53#include <linux/sysfs.h>
54#include <linux/acpi.h>
55#include <linux/io.h>
56
57/*
58 * If force_addr is set to anything different from 0, we forcibly enable
59 * the device at the given address.
60 */
61static u16 force_addr;
62module_param(force_addr, ushort, 0);
63MODULE_PARM_DESC(force_addr,
64 "Initialize the base address of the sensors");
65
66static struct platform_device *pdev;
67
68/* Many SIS5595 constants specified below */
69
70/* Length of ISA address segment */
71#define SIS5595_EXTENT 8
72/* PCI Config Registers */
73#define SIS5595_BASE_REG 0x68
74#define SIS5595_PIN_REG 0x7A
75#define SIS5595_ENABLE_REG 0x7B
76
77/* Where are the ISA address/data registers relative to the base address */
78#define SIS5595_ADDR_REG_OFFSET 5
79#define SIS5595_DATA_REG_OFFSET 6
80
81/* The SIS5595 registers */
82#define SIS5595_REG_IN_MAX(nr) (0x2b + (nr) * 2)
83#define SIS5595_REG_IN_MIN(nr) (0x2c + (nr) * 2)
84#define SIS5595_REG_IN(nr) (0x20 + (nr))
85
86#define SIS5595_REG_FAN_MIN(nr) (0x3b + (nr))
87#define SIS5595_REG_FAN(nr) (0x28 + (nr))
88
89/*
90 * On the first version of the chip, the temp registers are separate.
91 * On the second version,
92 * TEMP pin is shared with IN4, configured in PCI register 0x7A.
93 * The registers are the same as well.
94 * OVER and HYST are really MAX and MIN.
95 */
96
97#define REV2MIN 0xb0
98#define SIS5595_REG_TEMP (((data->revision) >= REV2MIN) ? \
99 SIS5595_REG_IN(4) : 0x27)
100#define SIS5595_REG_TEMP_OVER (((data->revision) >= REV2MIN) ? \
101 SIS5595_REG_IN_MAX(4) : 0x39)
102#define SIS5595_REG_TEMP_HYST (((data->revision) >= REV2MIN) ? \
103 SIS5595_REG_IN_MIN(4) : 0x3a)
104
105#define SIS5595_REG_CONFIG 0x40
106#define SIS5595_REG_ALARM1 0x41
107#define SIS5595_REG_ALARM2 0x42
108#define SIS5595_REG_FANDIV 0x47
109
110/*
111 * Conversions. Limit checking is only done on the TO_REG
112 * variants.
113 */
114
115/*
116 * IN: mV, (0V to 4.08V)
117 * REG: 16mV/bit
118 */
119static inline u8 IN_TO_REG(unsigned long val)
120{
121 unsigned long nval = clamp_val(val, 0, 4080);
122 return (nval + 8) / 16;
123}
124#define IN_FROM_REG(val) ((val) * 16)
125
126static inline u8 FAN_TO_REG(long rpm, int div)
127{
128 if (rpm <= 0)
129 return 255;
130 if (rpm > 1350000)
131 return 1;
132 return clamp_val((1350000 + rpm * div / 2) / (rpm * div), 1, 254);
133}
134
135static inline int FAN_FROM_REG(u8 val, int div)
136{
137 return val == 0 ? -1 : val == 255 ? 0 : 1350000 / (val * div);
138}
139
140/*
141 * TEMP: mC (-54.12C to +157.53C)
142 * REG: 0.83C/bit + 52.12, two's complement
143 */
144static inline int TEMP_FROM_REG(s8 val)
145{
146 return val * 830 + 52120;
147}
148static inline s8 TEMP_TO_REG(long val)
149{
150 int nval = clamp_val(val, -54120, 157530) ;
151 return nval < 0 ? (nval - 5212 - 415) / 830 : (nval - 5212 + 415) / 830;
152}
153
154/*
155 * FAN DIV: 1, 2, 4, or 8 (defaults to 2)
156 * REG: 0, 1, 2, or 3 (respectively) (defaults to 1)
157 */
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/*
165 * For each registered chip, we need to keep some data in memory.
166 * The structure is dynamically allocated.
167 */
168struct sis5595_data {
169 unsigned short addr;
170 const char *name;
171 struct device *hwmon_dev;
172 struct mutex lock;
173
174 struct mutex update_lock;
175 char valid; /* !=0 if following fields are valid */
176 unsigned long last_updated; /* In jiffies */
177 char maxins; /* == 3 if temp enabled, otherwise == 4 */
178 u8 revision; /* Reg. value */
179
180 u8 in[5]; /* Register value */
181 u8 in_max[5]; /* Register value */
182 u8 in_min[5]; /* Register value */
183 u8 fan[2]; /* Register value */
184 u8 fan_min[2]; /* Register value */
185 s8 temp; /* Register value */
186 s8 temp_over; /* Register value */
187 s8 temp_hyst; /* Register value */
188 u8 fan_div[2]; /* Register encoding, shifted right */
189 u16 alarms; /* Register encoding, combined */
190};
191
192static struct pci_dev *s_bridge; /* pointer to the (only) sis5595 */
193
194static int sis5595_probe(struct platform_device *pdev);
195static int sis5595_remove(struct platform_device *pdev);
196
197static int sis5595_read_value(struct sis5595_data *data, u8 reg);
198static void sis5595_write_value(struct sis5595_data *data, u8 reg, u8 value);
199static struct sis5595_data *sis5595_update_device(struct device *dev);
200static void sis5595_init_device(struct sis5595_data *data);
201
202static struct platform_driver sis5595_driver = {
203 .driver = {
204 .name = "sis5595",
205 },
206 .probe = sis5595_probe,
207 .remove = sis5595_remove,
208};
209
210/* 4 Voltages */
211static ssize_t in_show(struct device *dev, struct device_attribute *da,
212 char *buf)
213{
214 struct sis5595_data *data = sis5595_update_device(dev);
215 struct sensor_device_attribute *attr = to_sensor_dev_attr(da);
216 int nr = attr->index;
217 return sprintf(buf, "%d\n", IN_FROM_REG(data->in[nr]));
218}
219
220static ssize_t in_min_show(struct device *dev, struct device_attribute *da,
221 char *buf)
222{
223 struct sis5595_data *data = sis5595_update_device(dev);
224 struct sensor_device_attribute *attr = to_sensor_dev_attr(da);
225 int nr = attr->index;
226 return sprintf(buf, "%d\n", IN_FROM_REG(data->in_min[nr]));
227}
228
229static ssize_t in_max_show(struct device *dev, struct device_attribute *da,
230 char *buf)
231{
232 struct sis5595_data *data = sis5595_update_device(dev);
233 struct sensor_device_attribute *attr = to_sensor_dev_attr(da);
234 int nr = attr->index;
235 return sprintf(buf, "%d\n", IN_FROM_REG(data->in_max[nr]));
236}
237
238static ssize_t in_min_store(struct device *dev, struct device_attribute *da,
239 const char *buf, size_t count)
240{
241 struct sis5595_data *data = dev_get_drvdata(dev);
242 struct sensor_device_attribute *attr = to_sensor_dev_attr(da);
243 int nr = attr->index;
244 unsigned long val;
245 int err;
246
247 err = kstrtoul(buf, 10, &val);
248 if (err)
249 return err;
250
251 mutex_lock(&data->update_lock);
252 data->in_min[nr] = IN_TO_REG(val);
253 sis5595_write_value(data, SIS5595_REG_IN_MIN(nr), data->in_min[nr]);
254 mutex_unlock(&data->update_lock);
255 return count;
256}
257
258static ssize_t in_max_store(struct device *dev, struct device_attribute *da,
259 const char *buf, size_t count)
260{
261 struct sis5595_data *data = dev_get_drvdata(dev);
262 struct sensor_device_attribute *attr = to_sensor_dev_attr(da);
263 int nr = attr->index;
264 unsigned long val;
265 int err;
266
267 err = kstrtoul(buf, 10, &val);
268 if (err)
269 return err;
270
271 mutex_lock(&data->update_lock);
272 data->in_max[nr] = IN_TO_REG(val);
273 sis5595_write_value(data, SIS5595_REG_IN_MAX(nr), data->in_max[nr]);
274 mutex_unlock(&data->update_lock);
275 return count;
276}
277
278static SENSOR_DEVICE_ATTR_RO(in0_input, in, 0);
279static SENSOR_DEVICE_ATTR_RW(in0_min, in_min, 0);
280static SENSOR_DEVICE_ATTR_RW(in0_max, in_max, 0);
281static SENSOR_DEVICE_ATTR_RO(in1_input, in, 1);
282static SENSOR_DEVICE_ATTR_RW(in1_min, in_min, 1);
283static SENSOR_DEVICE_ATTR_RW(in1_max, in_max, 1);
284static SENSOR_DEVICE_ATTR_RO(in2_input, in, 2);
285static SENSOR_DEVICE_ATTR_RW(in2_min, in_min, 2);
286static SENSOR_DEVICE_ATTR_RW(in2_max, in_max, 2);
287static SENSOR_DEVICE_ATTR_RO(in3_input, in, 3);
288static SENSOR_DEVICE_ATTR_RW(in3_min, in_min, 3);
289static SENSOR_DEVICE_ATTR_RW(in3_max, in_max, 3);
290static SENSOR_DEVICE_ATTR_RO(in4_input, in, 4);
291static SENSOR_DEVICE_ATTR_RW(in4_min, in_min, 4);
292static SENSOR_DEVICE_ATTR_RW(in4_max, in_max, 4);
293
294/* Temperature */
295static ssize_t temp1_input_show(struct device *dev,
296 struct device_attribute *attr, char *buf)
297{
298 struct sis5595_data *data = sis5595_update_device(dev);
299 return sprintf(buf, "%d\n", TEMP_FROM_REG(data->temp));
300}
301
302static ssize_t temp1_max_show(struct device *dev, struct device_attribute *attr,
303 char *buf)
304{
305 struct sis5595_data *data = sis5595_update_device(dev);
306 return sprintf(buf, "%d\n", TEMP_FROM_REG(data->temp_over));
307}
308
309static ssize_t temp1_max_store(struct device *dev,
310 struct device_attribute *attr, const char *buf,
311 size_t count)
312{
313 struct sis5595_data *data = dev_get_drvdata(dev);
314 long val;
315 int err;
316
317 err = kstrtol(buf, 10, &val);
318 if (err)
319 return err;
320
321 mutex_lock(&data->update_lock);
322 data->temp_over = TEMP_TO_REG(val);
323 sis5595_write_value(data, SIS5595_REG_TEMP_OVER, data->temp_over);
324 mutex_unlock(&data->update_lock);
325 return count;
326}
327
328static ssize_t temp1_max_hyst_show(struct device *dev,
329 struct device_attribute *attr, char *buf)
330{
331 struct sis5595_data *data = sis5595_update_device(dev);
332 return sprintf(buf, "%d\n", TEMP_FROM_REG(data->temp_hyst));
333}
334
335static ssize_t temp1_max_hyst_store(struct device *dev,
336 struct device_attribute *attr,
337 const char *buf, size_t count)
338{
339 struct sis5595_data *data = dev_get_drvdata(dev);
340 long val;
341 int err;
342
343 err = kstrtol(buf, 10, &val);
344 if (err)
345 return err;
346
347 mutex_lock(&data->update_lock);
348 data->temp_hyst = TEMP_TO_REG(val);
349 sis5595_write_value(data, SIS5595_REG_TEMP_HYST, data->temp_hyst);
350 mutex_unlock(&data->update_lock);
351 return count;
352}
353
354static DEVICE_ATTR_RO(temp1_input);
355static DEVICE_ATTR_RW(temp1_max);
356static DEVICE_ATTR_RW(temp1_max_hyst);
357
358/* 2 Fans */
359static ssize_t fan_show(struct device *dev, struct device_attribute *da,
360 char *buf)
361{
362 struct sis5595_data *data = sis5595_update_device(dev);
363 struct sensor_device_attribute *attr = to_sensor_dev_attr(da);
364 int nr = attr->index;
365 return sprintf(buf, "%d\n", FAN_FROM_REG(data->fan[nr],
366 DIV_FROM_REG(data->fan_div[nr])));
367}
368
369static ssize_t fan_min_show(struct device *dev, struct device_attribute *da,
370 char *buf)
371{
372 struct sis5595_data *data = sis5595_update_device(dev);
373 struct sensor_device_attribute *attr = to_sensor_dev_attr(da);
374 int nr = attr->index;
375 return sprintf(buf, "%d\n", FAN_FROM_REG(data->fan_min[nr],
376 DIV_FROM_REG(data->fan_div[nr])));
377}
378
379static ssize_t fan_min_store(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 val;
386 int err;
387
388 err = kstrtoul(buf, 10, &val);
389 if (err)
390 return err;
391
392 mutex_lock(&data->update_lock);
393 data->fan_min[nr] = FAN_TO_REG(val, DIV_FROM_REG(data->fan_div[nr]));
394 sis5595_write_value(data, SIS5595_REG_FAN_MIN(nr), data->fan_min[nr]);
395 mutex_unlock(&data->update_lock);
396 return count;
397}
398
399static ssize_t fan_div_show(struct device *dev, struct device_attribute *da,
400 char *buf)
401{
402 struct sis5595_data *data = sis5595_update_device(dev);
403 struct sensor_device_attribute *attr = to_sensor_dev_attr(da);
404 int nr = attr->index;
405 return sprintf(buf, "%d\n", DIV_FROM_REG(data->fan_div[nr]));
406}
407
408/*
409 * Note: we save and restore the fan minimum here, because its value is
410 * determined in part by the fan divisor. This follows the principle of
411 * least surprise; the user doesn't expect the fan minimum to change just
412 * because the divisor changed.
413 */
414static ssize_t fan_div_store(struct device *dev, struct device_attribute *da,
415 const char *buf, size_t count)
416{
417 struct sis5595_data *data = dev_get_drvdata(dev);
418 struct sensor_device_attribute *attr = to_sensor_dev_attr(da);
419 int nr = attr->index;
420 unsigned long min;
421 int reg;
422 unsigned long val;
423 int err;
424
425 err = kstrtoul(buf, 10, &val);
426 if (err)
427 return err;
428
429 mutex_lock(&data->update_lock);
430 min = FAN_FROM_REG(data->fan_min[nr],
431 DIV_FROM_REG(data->fan_div[nr]));
432 reg = sis5595_read_value(data, SIS5595_REG_FANDIV);
433
434 switch (val) {
435 case 1:
436 data->fan_div[nr] = 0;
437 break;
438 case 2:
439 data->fan_div[nr] = 1;
440 break;
441 case 4:
442 data->fan_div[nr] = 2;
443 break;
444 case 8:
445 data->fan_div[nr] = 3;
446 break;
447 default:
448 dev_err(dev,
449 "fan_div value %ld not supported. Choose one of 1, 2, 4 or 8!\n",
450 val);
451 mutex_unlock(&data->update_lock);
452 return -EINVAL;
453 }
454
455 switch (nr) {
456 case 0:
457 reg = (reg & 0xcf) | (data->fan_div[nr] << 4);
458 break;
459 case 1:
460 reg = (reg & 0x3f) | (data->fan_div[nr] << 6);
461 break;
462 }
463 sis5595_write_value(data, SIS5595_REG_FANDIV, reg);
464 data->fan_min[nr] =
465 FAN_TO_REG(min, DIV_FROM_REG(data->fan_div[nr]));
466 sis5595_write_value(data, SIS5595_REG_FAN_MIN(nr), data->fan_min[nr]);
467 mutex_unlock(&data->update_lock);
468 return count;
469}
470
471static SENSOR_DEVICE_ATTR_RO(fan1_input, fan, 0);
472static SENSOR_DEVICE_ATTR_RW(fan1_min, fan_min, 0);
473static SENSOR_DEVICE_ATTR_RW(fan1_div, fan_div, 0);
474static SENSOR_DEVICE_ATTR_RO(fan2_input, fan, 1);
475static SENSOR_DEVICE_ATTR_RW(fan2_min, fan_min, 1);
476static SENSOR_DEVICE_ATTR_RW(fan2_div, fan_div, 1);
477
478/* Alarms */
479static ssize_t alarms_show(struct device *dev, struct device_attribute *attr,
480 char *buf)
481{
482 struct sis5595_data *data = sis5595_update_device(dev);
483 return sprintf(buf, "%d\n", data->alarms);
484}
485static DEVICE_ATTR_RO(alarms);
486
487static ssize_t alarm_show(struct device *dev, struct device_attribute *da,
488 char *buf)
489{
490 struct sis5595_data *data = sis5595_update_device(dev);
491 int nr = to_sensor_dev_attr(da)->index;
492 return sprintf(buf, "%u\n", (data->alarms >> nr) & 1);
493}
494static SENSOR_DEVICE_ATTR_RO(in0_alarm, alarm, 0);
495static SENSOR_DEVICE_ATTR_RO(in1_alarm, alarm, 1);
496static SENSOR_DEVICE_ATTR_RO(in2_alarm, alarm, 2);
497static SENSOR_DEVICE_ATTR_RO(in3_alarm, alarm, 3);
498static SENSOR_DEVICE_ATTR_RO(in4_alarm, alarm, 15);
499static SENSOR_DEVICE_ATTR_RO(fan1_alarm, alarm, 6);
500static SENSOR_DEVICE_ATTR_RO(fan2_alarm, alarm, 7);
501static SENSOR_DEVICE_ATTR_RO(temp1_alarm, alarm, 15);
502
503static ssize_t name_show(struct device *dev, struct device_attribute *attr,
504 char *buf)
505{
506 struct sis5595_data *data = dev_get_drvdata(dev);
507 return sprintf(buf, "%s\n", data->name);
508}
509static DEVICE_ATTR_RO(name);
510
511static struct attribute *sis5595_attributes[] = {
512 &sensor_dev_attr_in0_input.dev_attr.attr,
513 &sensor_dev_attr_in0_min.dev_attr.attr,
514 &sensor_dev_attr_in0_max.dev_attr.attr,
515 &sensor_dev_attr_in0_alarm.dev_attr.attr,
516 &sensor_dev_attr_in1_input.dev_attr.attr,
517 &sensor_dev_attr_in1_min.dev_attr.attr,
518 &sensor_dev_attr_in1_max.dev_attr.attr,
519 &sensor_dev_attr_in1_alarm.dev_attr.attr,
520 &sensor_dev_attr_in2_input.dev_attr.attr,
521 &sensor_dev_attr_in2_min.dev_attr.attr,
522 &sensor_dev_attr_in2_max.dev_attr.attr,
523 &sensor_dev_attr_in2_alarm.dev_attr.attr,
524 &sensor_dev_attr_in3_input.dev_attr.attr,
525 &sensor_dev_attr_in3_min.dev_attr.attr,
526 &sensor_dev_attr_in3_max.dev_attr.attr,
527 &sensor_dev_attr_in3_alarm.dev_attr.attr,
528
529 &sensor_dev_attr_fan1_input.dev_attr.attr,
530 &sensor_dev_attr_fan1_min.dev_attr.attr,
531 &sensor_dev_attr_fan1_div.dev_attr.attr,
532 &sensor_dev_attr_fan1_alarm.dev_attr.attr,
533 &sensor_dev_attr_fan2_input.dev_attr.attr,
534 &sensor_dev_attr_fan2_min.dev_attr.attr,
535 &sensor_dev_attr_fan2_div.dev_attr.attr,
536 &sensor_dev_attr_fan2_alarm.dev_attr.attr,
537
538 &dev_attr_alarms.attr,
539 &dev_attr_name.attr,
540 NULL
541};
542
543static const struct attribute_group sis5595_group = {
544 .attrs = sis5595_attributes,
545};
546
547static struct attribute *sis5595_attributes_in4[] = {
548 &sensor_dev_attr_in4_input.dev_attr.attr,
549 &sensor_dev_attr_in4_min.dev_attr.attr,
550 &sensor_dev_attr_in4_max.dev_attr.attr,
551 &sensor_dev_attr_in4_alarm.dev_attr.attr,
552 NULL
553};
554
555static const struct attribute_group sis5595_group_in4 = {
556 .attrs = sis5595_attributes_in4,
557};
558
559static struct attribute *sis5595_attributes_temp1[] = {
560 &dev_attr_temp1_input.attr,
561 &dev_attr_temp1_max.attr,
562 &dev_attr_temp1_max_hyst.attr,
563 &sensor_dev_attr_temp1_alarm.dev_attr.attr,
564 NULL
565};
566
567static const struct attribute_group sis5595_group_temp1 = {
568 .attrs = sis5595_attributes_temp1,
569};
570
571/* This is called when the module is loaded */
572static int sis5595_probe(struct platform_device *pdev)
573{
574 int err = 0;
575 int i;
576 struct sis5595_data *data;
577 struct resource *res;
578 char val;
579
580 /* Reserve the ISA region */
581 res = platform_get_resource(pdev, IORESOURCE_IO, 0);
582 if (!devm_request_region(&pdev->dev, res->start, SIS5595_EXTENT,
583 sis5595_driver.driver.name))
584 return -EBUSY;
585
586 data = devm_kzalloc(&pdev->dev, sizeof(struct sis5595_data),
587 GFP_KERNEL);
588 if (!data)
589 return -ENOMEM;
590
591 mutex_init(&data->lock);
592 mutex_init(&data->update_lock);
593 data->addr = res->start;
594 data->name = "sis5595";
595 platform_set_drvdata(pdev, data);
596
597 /*
598 * Check revision and pin registers to determine whether 4 or 5 voltages
599 */
600 data->revision = s_bridge->revision;
601 /* 4 voltages, 1 temp */
602 data->maxins = 3;
603 if (data->revision >= REV2MIN) {
604 pci_read_config_byte(s_bridge, SIS5595_PIN_REG, &val);
605 if (!(val & 0x80))
606 /* 5 voltages, no temps */
607 data->maxins = 4;
608 }
609
610 /* Initialize the SIS5595 chip */
611 sis5595_init_device(data);
612
613 /* A few vars need to be filled upon startup */
614 for (i = 0; i < 2; i++) {
615 data->fan_min[i] = sis5595_read_value(data,
616 SIS5595_REG_FAN_MIN(i));
617 }
618
619 /* Register sysfs hooks */
620 err = sysfs_create_group(&pdev->dev.kobj, &sis5595_group);
621 if (err)
622 return err;
623 if (data->maxins == 4) {
624 err = sysfs_create_group(&pdev->dev.kobj, &sis5595_group_in4);
625 if (err)
626 goto exit_remove_files;
627 } else {
628 err = sysfs_create_group(&pdev->dev.kobj, &sis5595_group_temp1);
629 if (err)
630 goto exit_remove_files;
631 }
632
633 data->hwmon_dev = hwmon_device_register(&pdev->dev);
634 if (IS_ERR(data->hwmon_dev)) {
635 err = PTR_ERR(data->hwmon_dev);
636 goto exit_remove_files;
637 }
638
639 return 0;
640
641exit_remove_files:
642 sysfs_remove_group(&pdev->dev.kobj, &sis5595_group);
643 sysfs_remove_group(&pdev->dev.kobj, &sis5595_group_in4);
644 sysfs_remove_group(&pdev->dev.kobj, &sis5595_group_temp1);
645 return err;
646}
647
648static int sis5595_remove(struct platform_device *pdev)
649{
650 struct sis5595_data *data = platform_get_drvdata(pdev);
651
652 hwmon_device_unregister(data->hwmon_dev);
653 sysfs_remove_group(&pdev->dev.kobj, &sis5595_group);
654 sysfs_remove_group(&pdev->dev.kobj, &sis5595_group_in4);
655 sysfs_remove_group(&pdev->dev.kobj, &sis5595_group_temp1);
656
657 return 0;
658}
659
660/* ISA access must be locked explicitly. */
661static int sis5595_read_value(struct sis5595_data *data, u8 reg)
662{
663 int res;
664
665 mutex_lock(&data->lock);
666 outb_p(reg, data->addr + SIS5595_ADDR_REG_OFFSET);
667 res = inb_p(data->addr + SIS5595_DATA_REG_OFFSET);
668 mutex_unlock(&data->lock);
669 return res;
670}
671
672static void sis5595_write_value(struct sis5595_data *data, u8 reg, u8 value)
673{
674 mutex_lock(&data->lock);
675 outb_p(reg, data->addr + SIS5595_ADDR_REG_OFFSET);
676 outb_p(value, data->addr + SIS5595_DATA_REG_OFFSET);
677 mutex_unlock(&data->lock);
678}
679
680/* Called when we have found a new SIS5595. */
681static void sis5595_init_device(struct sis5595_data *data)
682{
683 u8 config = sis5595_read_value(data, SIS5595_REG_CONFIG);
684 if (!(config & 0x01))
685 sis5595_write_value(data, SIS5595_REG_CONFIG,
686 (config & 0xf7) | 0x01);
687}
688
689static struct sis5595_data *sis5595_update_device(struct device *dev)
690{
691 struct sis5595_data *data = dev_get_drvdata(dev);
692 int i;
693
694 mutex_lock(&data->update_lock);
695
696 if (time_after(jiffies, data->last_updated + HZ + HZ / 2)
697 || !data->valid) {
698
699 for (i = 0; i <= data->maxins; i++) {
700 data->in[i] =
701 sis5595_read_value(data, SIS5595_REG_IN(i));
702 data->in_min[i] =
703 sis5595_read_value(data,
704 SIS5595_REG_IN_MIN(i));
705 data->in_max[i] =
706 sis5595_read_value(data,
707 SIS5595_REG_IN_MAX(i));
708 }
709 for (i = 0; i < 2; i++) {
710 data->fan[i] =
711 sis5595_read_value(data, SIS5595_REG_FAN(i));
712 data->fan_min[i] =
713 sis5595_read_value(data,
714 SIS5595_REG_FAN_MIN(i));
715 }
716 if (data->maxins == 3) {
717 data->temp =
718 sis5595_read_value(data, SIS5595_REG_TEMP);
719 data->temp_over =
720 sis5595_read_value(data, SIS5595_REG_TEMP_OVER);
721 data->temp_hyst =
722 sis5595_read_value(data, SIS5595_REG_TEMP_HYST);
723 }
724 i = sis5595_read_value(data, SIS5595_REG_FANDIV);
725 data->fan_div[0] = (i >> 4) & 0x03;
726 data->fan_div[1] = i >> 6;
727 data->alarms =
728 sis5595_read_value(data, SIS5595_REG_ALARM1) |
729 (sis5595_read_value(data, SIS5595_REG_ALARM2) << 8);
730 data->last_updated = jiffies;
731 data->valid = 1;
732 }
733
734 mutex_unlock(&data->update_lock);
735
736 return data;
737}
738
739static const struct pci_device_id sis5595_pci_ids[] = {
740 { PCI_DEVICE(PCI_VENDOR_ID_SI, PCI_DEVICE_ID_SI_503) },
741 { 0, }
742};
743
744MODULE_DEVICE_TABLE(pci, sis5595_pci_ids);
745
746static int blacklist[] = {
747 PCI_DEVICE_ID_SI_540,
748 PCI_DEVICE_ID_SI_550,
749 PCI_DEVICE_ID_SI_630,
750 PCI_DEVICE_ID_SI_645,
751 PCI_DEVICE_ID_SI_730,
752 PCI_DEVICE_ID_SI_735,
753 PCI_DEVICE_ID_SI_5511, /*
754 * 5513 chip has the 0008 device but
755 * that ID shows up in other chips so we
756 * use the 5511 ID for recognition
757 */
758 PCI_DEVICE_ID_SI_5597,
759 PCI_DEVICE_ID_SI_5598,
760 0 };
761
762static int sis5595_device_add(unsigned short address)
763{
764 struct resource res = {
765 .start = address,
766 .end = address + SIS5595_EXTENT - 1,
767 .name = "sis5595",
768 .flags = IORESOURCE_IO,
769 };
770 int err;
771
772 err = acpi_check_resource_conflict(&res);
773 if (err)
774 goto exit;
775
776 pdev = platform_device_alloc("sis5595", address);
777 if (!pdev) {
778 err = -ENOMEM;
779 pr_err("Device allocation failed\n");
780 goto exit;
781 }
782
783 err = platform_device_add_resources(pdev, &res, 1);
784 if (err) {
785 pr_err("Device resource addition failed (%d)\n", err);
786 goto exit_device_put;
787 }
788
789 err = platform_device_add(pdev);
790 if (err) {
791 pr_err("Device addition failed (%d)\n", err);
792 goto exit_device_put;
793 }
794
795 return 0;
796
797exit_device_put:
798 platform_device_put(pdev);
799exit:
800 return err;
801}
802
803static int sis5595_pci_probe(struct pci_dev *dev,
804 const struct pci_device_id *id)
805{
806 u16 address;
807 u8 enable;
808 int *i;
809
810 for (i = blacklist; *i != 0; i++) {
811 struct pci_dev *d;
812 d = pci_get_device(PCI_VENDOR_ID_SI, *i, NULL);
813 if (d) {
814 dev_err(&d->dev,
815 "Looked for SIS5595 but found unsupported device %.4x\n",
816 *i);
817 pci_dev_put(d);
818 return -ENODEV;
819 }
820 }
821
822 force_addr &= ~(SIS5595_EXTENT - 1);
823 if (force_addr) {
824 dev_warn(&dev->dev, "Forcing ISA address 0x%x\n", force_addr);
825 pci_write_config_word(dev, SIS5595_BASE_REG, force_addr);
826 }
827
828 if (PCIBIOS_SUCCESSFUL !=
829 pci_read_config_word(dev, SIS5595_BASE_REG, &address)) {
830 dev_err(&dev->dev, "Failed to read ISA address\n");
831 return -ENODEV;
832 }
833
834 address &= ~(SIS5595_EXTENT - 1);
835 if (!address) {
836 dev_err(&dev->dev,
837 "Base address not set - upgrade BIOS or use force_addr=0xaddr\n");
838 return -ENODEV;
839 }
840 if (force_addr && address != force_addr) {
841 /* doesn't work for some chips? */
842 dev_err(&dev->dev, "Failed to force ISA address\n");
843 return -ENODEV;
844 }
845
846 if (PCIBIOS_SUCCESSFUL !=
847 pci_read_config_byte(dev, SIS5595_ENABLE_REG, &enable)) {
848 dev_err(&dev->dev, "Failed to read enable register\n");
849 return -ENODEV;
850 }
851 if (!(enable & 0x80)) {
852 if ((PCIBIOS_SUCCESSFUL !=
853 pci_write_config_byte(dev, SIS5595_ENABLE_REG,
854 enable | 0x80))
855 || (PCIBIOS_SUCCESSFUL !=
856 pci_read_config_byte(dev, SIS5595_ENABLE_REG, &enable))
857 || (!(enable & 0x80))) {
858 /* doesn't work for some chips! */
859 dev_err(&dev->dev, "Failed to enable HWM device\n");
860 return -ENODEV;
861 }
862 }
863
864 if (platform_driver_register(&sis5595_driver)) {
865 dev_dbg(&dev->dev, "Failed to register sis5595 driver\n");
866 goto exit;
867 }
868
869 s_bridge = pci_dev_get(dev);
870 /* Sets global pdev as a side effect */
871 if (sis5595_device_add(address))
872 goto exit_unregister;
873
874 /*
875 * Always return failure here. This is to allow other drivers to bind
876 * to this pci device. We don't really want to have control over the
877 * pci device, we only wanted to read as few register values from it.
878 */
879 return -ENODEV;
880
881exit_unregister:
882 pci_dev_put(dev);
883 platform_driver_unregister(&sis5595_driver);
884exit:
885 return -ENODEV;
886}
887
888static struct pci_driver sis5595_pci_driver = {
889 .name = "sis5595",
890 .id_table = sis5595_pci_ids,
891 .probe = sis5595_pci_probe,
892};
893
894static int __init sm_sis5595_init(void)
895{
896 return pci_register_driver(&sis5595_pci_driver);
897}
898
899static void __exit sm_sis5595_exit(void)
900{
901 pci_unregister_driver(&sis5595_pci_driver);
902 if (s_bridge != NULL) {
903 platform_device_unregister(pdev);
904 platform_driver_unregister(&sis5595_driver);
905 pci_dev_put(s_bridge);
906 s_bridge = NULL;
907 }
908}
909
910MODULE_AUTHOR("Aurelien Jarno <aurelien@aurel32.net>");
911MODULE_DESCRIPTION("SiS 5595 Sensor device");
912MODULE_LICENSE("GPL");
913
914module_init(sm_sis5595_init);
915module_exit(sm_sis5595_exit);
1/*
2 * sis5595.c - Part of lm_sensors, Linux kernel modules
3 * for hardware monitoring
4 *
5 * Copyright (C) 1998 - 2001 Frodo Looijaard <frodol@dds.nl>,
6 * Kyösti Mälkki <kmalkki@cc.hut.fi>, and
7 * Mark D. Studebaker <mdsxyz123@yahoo.com>
8 * Ported to Linux 2.6 by Aurelien Jarno <aurelien@aurel32.net> with
9 * the help of Jean Delvare <jdelvare@suse.de>
10 *
11 * This program is free software; you can redistribute it and/or modify
12 * it under the terms of the GNU General Public License as published by
13 * the Free Software Foundation; either version 2 of the License, or
14 * (at your option) any later version.
15 *
16 * This program is distributed in the hope that it will be useful,
17 * but WITHOUT ANY WARRANTY; without even the implied warranty of
18 * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
19 * GNU General Public License for more details.
20 *
21 * You should have received a copy of the GNU General Public License
22 * along with this program; if not, write to the Free Software
23 * Foundation, Inc., 675 Mass Ave, Cambridge, MA 02139, USA.
24 */
25
26/*
27 * SiS southbridge has a LM78-like chip integrated on the same IC.
28 * This driver is a customized copy of lm78.c
29 *
30 * Supports following revisions:
31 * Version PCI ID PCI Revision
32 * 1 1039/0008 AF or less
33 * 2 1039/0008 B0 or greater
34 *
35 * Note: these chips contain a 0008 device which is incompatible with the
36 * 5595. We recognize these by the presence of the listed
37 * "blacklist" PCI ID and refuse to load.
38 *
39 * NOT SUPPORTED PCI ID BLACKLIST PCI ID
40 * 540 0008 0540
41 * 550 0008 0550
42 * 5513 0008 5511
43 * 5581 0008 5597
44 * 5582 0008 5597
45 * 5597 0008 5597
46 * 5598 0008 5597/5598
47 * 630 0008 0630
48 * 645 0008 0645
49 * 730 0008 0730
50 * 735 0008 0735
51 */
52
53#define pr_fmt(fmt) KBUILD_MODNAME ": " fmt
54
55#include <linux/module.h>
56#include <linux/slab.h>
57#include <linux/ioport.h>
58#include <linux/pci.h>
59#include <linux/platform_device.h>
60#include <linux/hwmon.h>
61#include <linux/hwmon-sysfs.h>
62#include <linux/err.h>
63#include <linux/init.h>
64#include <linux/jiffies.h>
65#include <linux/mutex.h>
66#include <linux/sysfs.h>
67#include <linux/acpi.h>
68#include <linux/io.h>
69
70
71/*
72 * If force_addr is set to anything different from 0, we forcibly enable
73 * the device at the given address.
74 */
75static u16 force_addr;
76module_param(force_addr, ushort, 0);
77MODULE_PARM_DESC(force_addr,
78 "Initialize the base address of the sensors");
79
80static struct platform_device *pdev;
81
82/* Many SIS5595 constants specified below */
83
84/* Length of ISA address segment */
85#define SIS5595_EXTENT 8
86/* PCI Config Registers */
87#define SIS5595_BASE_REG 0x68
88#define SIS5595_PIN_REG 0x7A
89#define SIS5595_ENABLE_REG 0x7B
90
91/* Where are the ISA address/data registers relative to the base address */
92#define SIS5595_ADDR_REG_OFFSET 5
93#define SIS5595_DATA_REG_OFFSET 6
94
95/* The SIS5595 registers */
96#define SIS5595_REG_IN_MAX(nr) (0x2b + (nr) * 2)
97#define SIS5595_REG_IN_MIN(nr) (0x2c + (nr) * 2)
98#define SIS5595_REG_IN(nr) (0x20 + (nr))
99
100#define SIS5595_REG_FAN_MIN(nr) (0x3b + (nr))
101#define SIS5595_REG_FAN(nr) (0x28 + (nr))
102
103/*
104 * On the first version of the chip, the temp registers are separate.
105 * On the second version,
106 * TEMP pin is shared with IN4, configured in PCI register 0x7A.
107 * The registers are the same as well.
108 * OVER and HYST are really MAX and MIN.
109 */
110
111#define REV2MIN 0xb0
112#define SIS5595_REG_TEMP (((data->revision) >= REV2MIN) ? \
113 SIS5595_REG_IN(4) : 0x27)
114#define SIS5595_REG_TEMP_OVER (((data->revision) >= REV2MIN) ? \
115 SIS5595_REG_IN_MAX(4) : 0x39)
116#define SIS5595_REG_TEMP_HYST (((data->revision) >= REV2MIN) ? \
117 SIS5595_REG_IN_MIN(4) : 0x3a)
118
119#define SIS5595_REG_CONFIG 0x40
120#define SIS5595_REG_ALARM1 0x41
121#define SIS5595_REG_ALARM2 0x42
122#define SIS5595_REG_FANDIV 0x47
123
124/*
125 * Conversions. Limit checking is only done on the TO_REG
126 * variants.
127 */
128
129/*
130 * IN: mV, (0V to 4.08V)
131 * REG: 16mV/bit
132 */
133static inline u8 IN_TO_REG(unsigned long val)
134{
135 unsigned long nval = clamp_val(val, 0, 4080);
136 return (nval + 8) / 16;
137}
138#define IN_FROM_REG(val) ((val) * 16)
139
140static inline u8 FAN_TO_REG(long rpm, int div)
141{
142 if (rpm <= 0)
143 return 255;
144 if (rpm > 1350000)
145 return 1;
146 return clamp_val((1350000 + rpm * div / 2) / (rpm * div), 1, 254);
147}
148
149static inline int FAN_FROM_REG(u8 val, int div)
150{
151 return val == 0 ? -1 : val == 255 ? 0 : 1350000 / (val * div);
152}
153
154/*
155 * TEMP: mC (-54.12C to +157.53C)
156 * REG: 0.83C/bit + 52.12, two's complement
157 */
158static inline int TEMP_FROM_REG(s8 val)
159{
160 return val * 830 + 52120;
161}
162static inline s8 TEMP_TO_REG(long val)
163{
164 int nval = clamp_val(val, -54120, 157530) ;
165 return nval < 0 ? (nval - 5212 - 415) / 830 : (nval - 5212 + 415) / 830;
166}
167
168/*
169 * FAN DIV: 1, 2, 4, or 8 (defaults to 2)
170 * REG: 0, 1, 2, or 3 (respectively) (defaults to 1)
171 */
172static inline u8 DIV_TO_REG(int val)
173{
174 return val == 8 ? 3 : val == 4 ? 2 : val == 1 ? 0 : 1;
175}
176#define DIV_FROM_REG(val) (1 << (val))
177
178/*
179 * For each registered chip, we need to keep some data in memory.
180 * The structure is dynamically allocated.
181 */
182struct sis5595_data {
183 unsigned short addr;
184 const char *name;
185 struct device *hwmon_dev;
186 struct mutex lock;
187
188 struct mutex update_lock;
189 char valid; /* !=0 if following fields are valid */
190 unsigned long last_updated; /* In jiffies */
191 char maxins; /* == 3 if temp enabled, otherwise == 4 */
192 u8 revision; /* Reg. value */
193
194 u8 in[5]; /* Register value */
195 u8 in_max[5]; /* Register value */
196 u8 in_min[5]; /* Register value */
197 u8 fan[2]; /* Register value */
198 u8 fan_min[2]; /* Register value */
199 s8 temp; /* Register value */
200 s8 temp_over; /* Register value */
201 s8 temp_hyst; /* Register value */
202 u8 fan_div[2]; /* Register encoding, shifted right */
203 u16 alarms; /* Register encoding, combined */
204};
205
206static struct pci_dev *s_bridge; /* pointer to the (only) sis5595 */
207
208static int sis5595_probe(struct platform_device *pdev);
209static int sis5595_remove(struct platform_device *pdev);
210
211static int sis5595_read_value(struct sis5595_data *data, u8 reg);
212static void sis5595_write_value(struct sis5595_data *data, u8 reg, u8 value);
213static struct sis5595_data *sis5595_update_device(struct device *dev);
214static void sis5595_init_device(struct sis5595_data *data);
215
216static struct platform_driver sis5595_driver = {
217 .driver = {
218 .name = "sis5595",
219 },
220 .probe = sis5595_probe,
221 .remove = sis5595_remove,
222};
223
224/* 4 Voltages */
225static ssize_t show_in(struct device *dev, struct device_attribute *da,
226 char *buf)
227{
228 struct sis5595_data *data = sis5595_update_device(dev);
229 struct sensor_device_attribute *attr = to_sensor_dev_attr(da);
230 int nr = attr->index;
231 return sprintf(buf, "%d\n", IN_FROM_REG(data->in[nr]));
232}
233
234static ssize_t show_in_min(struct device *dev, struct device_attribute *da,
235 char *buf)
236{
237 struct sis5595_data *data = sis5595_update_device(dev);
238 struct sensor_device_attribute *attr = to_sensor_dev_attr(da);
239 int nr = attr->index;
240 return sprintf(buf, "%d\n", IN_FROM_REG(data->in_min[nr]));
241}
242
243static ssize_t show_in_max(struct device *dev, struct device_attribute *da,
244 char *buf)
245{
246 struct sis5595_data *data = sis5595_update_device(dev);
247 struct sensor_device_attribute *attr = to_sensor_dev_attr(da);
248 int nr = attr->index;
249 return sprintf(buf, "%d\n", IN_FROM_REG(data->in_max[nr]));
250}
251
252static ssize_t set_in_min(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;
259 int err;
260
261 err = kstrtoul(buf, 10, &val);
262 if (err)
263 return err;
264
265 mutex_lock(&data->update_lock);
266 data->in_min[nr] = IN_TO_REG(val);
267 sis5595_write_value(data, SIS5595_REG_IN_MIN(nr), data->in_min[nr]);
268 mutex_unlock(&data->update_lock);
269 return count;
270}
271
272static ssize_t set_in_max(struct device *dev, struct device_attribute *da,
273 const char *buf, size_t count)
274{
275 struct sis5595_data *data = dev_get_drvdata(dev);
276 struct sensor_device_attribute *attr = to_sensor_dev_attr(da);
277 int nr = attr->index;
278 unsigned long val;
279 int err;
280
281 err = kstrtoul(buf, 10, &val);
282 if (err)
283 return err;
284
285 mutex_lock(&data->update_lock);
286 data->in_max[nr] = IN_TO_REG(val);
287 sis5595_write_value(data, SIS5595_REG_IN_MAX(nr), data->in_max[nr]);
288 mutex_unlock(&data->update_lock);
289 return count;
290}
291
292#define show_in_offset(offset) \
293static SENSOR_DEVICE_ATTR(in##offset##_input, S_IRUGO, \
294 show_in, NULL, offset); \
295static SENSOR_DEVICE_ATTR(in##offset##_min, S_IRUGO | S_IWUSR, \
296 show_in_min, set_in_min, offset); \
297static SENSOR_DEVICE_ATTR(in##offset##_max, S_IRUGO | S_IWUSR, \
298 show_in_max, set_in_max, offset);
299
300show_in_offset(0);
301show_in_offset(1);
302show_in_offset(2);
303show_in_offset(3);
304show_in_offset(4);
305
306/* Temperature */
307static ssize_t show_temp(struct device *dev, struct device_attribute *attr,
308 char *buf)
309{
310 struct sis5595_data *data = sis5595_update_device(dev);
311 return sprintf(buf, "%d\n", TEMP_FROM_REG(data->temp));
312}
313
314static ssize_t show_temp_over(struct device *dev, struct device_attribute *attr,
315 char *buf)
316{
317 struct sis5595_data *data = sis5595_update_device(dev);
318 return sprintf(buf, "%d\n", TEMP_FROM_REG(data->temp_over));
319}
320
321static ssize_t set_temp_over(struct device *dev, struct device_attribute *attr,
322 const char *buf, size_t count)
323{
324 struct sis5595_data *data = dev_get_drvdata(dev);
325 long val;
326 int err;
327
328 err = kstrtol(buf, 10, &val);
329 if (err)
330 return err;
331
332 mutex_lock(&data->update_lock);
333 data->temp_over = TEMP_TO_REG(val);
334 sis5595_write_value(data, SIS5595_REG_TEMP_OVER, data->temp_over);
335 mutex_unlock(&data->update_lock);
336 return count;
337}
338
339static ssize_t show_temp_hyst(struct device *dev, struct device_attribute *attr,
340 char *buf)
341{
342 struct sis5595_data *data = sis5595_update_device(dev);
343 return sprintf(buf, "%d\n", TEMP_FROM_REG(data->temp_hyst));
344}
345
346static ssize_t set_temp_hyst(struct device *dev, struct device_attribute *attr,
347 const char *buf, size_t count)
348{
349 struct sis5595_data *data = dev_get_drvdata(dev);
350 long val;
351 int err;
352
353 err = kstrtol(buf, 10, &val);
354 if (err)
355 return err;
356
357 mutex_lock(&data->update_lock);
358 data->temp_hyst = TEMP_TO_REG(val);
359 sis5595_write_value(data, SIS5595_REG_TEMP_HYST, data->temp_hyst);
360 mutex_unlock(&data->update_lock);
361 return count;
362}
363
364static DEVICE_ATTR(temp1_input, S_IRUGO, show_temp, NULL);
365static DEVICE_ATTR(temp1_max, S_IRUGO | S_IWUSR,
366 show_temp_over, set_temp_over);
367static DEVICE_ATTR(temp1_max_hyst, S_IRUGO | S_IWUSR,
368 show_temp_hyst, set_temp_hyst);
369
370/* 2 Fans */
371static ssize_t show_fan(struct device *dev, struct device_attribute *da,
372 char *buf)
373{
374 struct sis5595_data *data = sis5595_update_device(dev);
375 struct sensor_device_attribute *attr = to_sensor_dev_attr(da);
376 int nr = attr->index;
377 return sprintf(buf, "%d\n", FAN_FROM_REG(data->fan[nr],
378 DIV_FROM_REG(data->fan_div[nr])));
379}
380
381static ssize_t show_fan_min(struct device *dev, struct device_attribute *da,
382 char *buf)
383{
384 struct sis5595_data *data = sis5595_update_device(dev);
385 struct sensor_device_attribute *attr = to_sensor_dev_attr(da);
386 int nr = attr->index;
387 return sprintf(buf, "%d\n", FAN_FROM_REG(data->fan_min[nr],
388 DIV_FROM_REG(data->fan_div[nr])));
389}
390
391static ssize_t set_fan_min(struct device *dev, struct device_attribute *da,
392 const char *buf, size_t count)
393{
394 struct sis5595_data *data = dev_get_drvdata(dev);
395 struct sensor_device_attribute *attr = to_sensor_dev_attr(da);
396 int nr = attr->index;
397 unsigned long val;
398 int err;
399
400 err = kstrtoul(buf, 10, &val);
401 if (err)
402 return err;
403
404 mutex_lock(&data->update_lock);
405 data->fan_min[nr] = FAN_TO_REG(val, DIV_FROM_REG(data->fan_div[nr]));
406 sis5595_write_value(data, SIS5595_REG_FAN_MIN(nr), data->fan_min[nr]);
407 mutex_unlock(&data->update_lock);
408 return count;
409}
410
411static ssize_t show_fan_div(struct device *dev, struct device_attribute *da,
412 char *buf)
413{
414 struct sis5595_data *data = sis5595_update_device(dev);
415 struct sensor_device_attribute *attr = to_sensor_dev_attr(da);
416 int nr = attr->index;
417 return sprintf(buf, "%d\n", DIV_FROM_REG(data->fan_div[nr]));
418}
419
420/*
421 * Note: we save and restore the fan minimum here, because its value is
422 * determined in part by the fan divisor. This follows the principle of
423 * least surprise; the user doesn't expect the fan minimum to change just
424 * because the divisor changed.
425 */
426static ssize_t set_fan_div(struct device *dev, struct device_attribute *da,
427 const char *buf, size_t count)
428{
429 struct sis5595_data *data = dev_get_drvdata(dev);
430 struct sensor_device_attribute *attr = to_sensor_dev_attr(da);
431 int nr = attr->index;
432 unsigned long min;
433 int reg;
434 unsigned long val;
435 int err;
436
437 err = kstrtoul(buf, 10, &val);
438 if (err)
439 return err;
440
441 mutex_lock(&data->update_lock);
442 min = FAN_FROM_REG(data->fan_min[nr],
443 DIV_FROM_REG(data->fan_div[nr]));
444 reg = sis5595_read_value(data, SIS5595_REG_FANDIV);
445
446 switch (val) {
447 case 1:
448 data->fan_div[nr] = 0;
449 break;
450 case 2:
451 data->fan_div[nr] = 1;
452 break;
453 case 4:
454 data->fan_div[nr] = 2;
455 break;
456 case 8:
457 data->fan_div[nr] = 3;
458 break;
459 default:
460 dev_err(dev,
461 "fan_div value %ld not supported. Choose one of 1, 2, 4 or 8!\n",
462 val);
463 mutex_unlock(&data->update_lock);
464 return -EINVAL;
465 }
466
467 switch (nr) {
468 case 0:
469 reg = (reg & 0xcf) | (data->fan_div[nr] << 4);
470 break;
471 case 1:
472 reg = (reg & 0x3f) | (data->fan_div[nr] << 6);
473 break;
474 }
475 sis5595_write_value(data, SIS5595_REG_FANDIV, reg);
476 data->fan_min[nr] =
477 FAN_TO_REG(min, DIV_FROM_REG(data->fan_div[nr]));
478 sis5595_write_value(data, SIS5595_REG_FAN_MIN(nr), data->fan_min[nr]);
479 mutex_unlock(&data->update_lock);
480 return count;
481}
482
483#define show_fan_offset(offset) \
484static SENSOR_DEVICE_ATTR(fan##offset##_input, S_IRUGO, \
485 show_fan, NULL, offset - 1); \
486static SENSOR_DEVICE_ATTR(fan##offset##_min, S_IRUGO | S_IWUSR, \
487 show_fan_min, set_fan_min, offset - 1); \
488static SENSOR_DEVICE_ATTR(fan##offset##_div, S_IRUGO | S_IWUSR, \
489 show_fan_div, set_fan_div, offset - 1);
490
491show_fan_offset(1);
492show_fan_offset(2);
493
494/* Alarms */
495static ssize_t show_alarms(struct device *dev, struct device_attribute *attr,
496 char *buf)
497{
498 struct sis5595_data *data = sis5595_update_device(dev);
499 return sprintf(buf, "%d\n", data->alarms);
500}
501static DEVICE_ATTR(alarms, S_IRUGO, show_alarms, NULL);
502
503static ssize_t show_alarm(struct device *dev, struct device_attribute *da,
504 char *buf)
505{
506 struct sis5595_data *data = sis5595_update_device(dev);
507 int nr = to_sensor_dev_attr(da)->index;
508 return sprintf(buf, "%u\n", (data->alarms >> nr) & 1);
509}
510static SENSOR_DEVICE_ATTR(in0_alarm, S_IRUGO, show_alarm, NULL, 0);
511static SENSOR_DEVICE_ATTR(in1_alarm, S_IRUGO, show_alarm, NULL, 1);
512static SENSOR_DEVICE_ATTR(in2_alarm, S_IRUGO, show_alarm, NULL, 2);
513static SENSOR_DEVICE_ATTR(in3_alarm, S_IRUGO, show_alarm, NULL, 3);
514static SENSOR_DEVICE_ATTR(in4_alarm, S_IRUGO, show_alarm, NULL, 15);
515static SENSOR_DEVICE_ATTR(fan1_alarm, S_IRUGO, show_alarm, NULL, 6);
516static SENSOR_DEVICE_ATTR(fan2_alarm, S_IRUGO, show_alarm, NULL, 7);
517static SENSOR_DEVICE_ATTR(temp1_alarm, S_IRUGO, show_alarm, NULL, 15);
518
519static ssize_t show_name(struct device *dev, struct device_attribute *attr,
520 char *buf)
521{
522 struct sis5595_data *data = dev_get_drvdata(dev);
523 return sprintf(buf, "%s\n", data->name);
524}
525static DEVICE_ATTR(name, S_IRUGO, show_name, NULL);
526
527static struct attribute *sis5595_attributes[] = {
528 &sensor_dev_attr_in0_input.dev_attr.attr,
529 &sensor_dev_attr_in0_min.dev_attr.attr,
530 &sensor_dev_attr_in0_max.dev_attr.attr,
531 &sensor_dev_attr_in0_alarm.dev_attr.attr,
532 &sensor_dev_attr_in1_input.dev_attr.attr,
533 &sensor_dev_attr_in1_min.dev_attr.attr,
534 &sensor_dev_attr_in1_max.dev_attr.attr,
535 &sensor_dev_attr_in1_alarm.dev_attr.attr,
536 &sensor_dev_attr_in2_input.dev_attr.attr,
537 &sensor_dev_attr_in2_min.dev_attr.attr,
538 &sensor_dev_attr_in2_max.dev_attr.attr,
539 &sensor_dev_attr_in2_alarm.dev_attr.attr,
540 &sensor_dev_attr_in3_input.dev_attr.attr,
541 &sensor_dev_attr_in3_min.dev_attr.attr,
542 &sensor_dev_attr_in3_max.dev_attr.attr,
543 &sensor_dev_attr_in3_alarm.dev_attr.attr,
544
545 &sensor_dev_attr_fan1_input.dev_attr.attr,
546 &sensor_dev_attr_fan1_min.dev_attr.attr,
547 &sensor_dev_attr_fan1_div.dev_attr.attr,
548 &sensor_dev_attr_fan1_alarm.dev_attr.attr,
549 &sensor_dev_attr_fan2_input.dev_attr.attr,
550 &sensor_dev_attr_fan2_min.dev_attr.attr,
551 &sensor_dev_attr_fan2_div.dev_attr.attr,
552 &sensor_dev_attr_fan2_alarm.dev_attr.attr,
553
554 &dev_attr_alarms.attr,
555 &dev_attr_name.attr,
556 NULL
557};
558
559static const struct attribute_group sis5595_group = {
560 .attrs = sis5595_attributes,
561};
562
563static struct attribute *sis5595_attributes_in4[] = {
564 &sensor_dev_attr_in4_input.dev_attr.attr,
565 &sensor_dev_attr_in4_min.dev_attr.attr,
566 &sensor_dev_attr_in4_max.dev_attr.attr,
567 &sensor_dev_attr_in4_alarm.dev_attr.attr,
568 NULL
569};
570
571static const struct attribute_group sis5595_group_in4 = {
572 .attrs = sis5595_attributes_in4,
573};
574
575static struct attribute *sis5595_attributes_temp1[] = {
576 &dev_attr_temp1_input.attr,
577 &dev_attr_temp1_max.attr,
578 &dev_attr_temp1_max_hyst.attr,
579 &sensor_dev_attr_temp1_alarm.dev_attr.attr,
580 NULL
581};
582
583static const struct attribute_group sis5595_group_temp1 = {
584 .attrs = sis5595_attributes_temp1,
585};
586
587/* This is called when the module is loaded */
588static int sis5595_probe(struct platform_device *pdev)
589{
590 int err = 0;
591 int i;
592 struct sis5595_data *data;
593 struct resource *res;
594 char val;
595
596 /* Reserve the ISA region */
597 res = platform_get_resource(pdev, IORESOURCE_IO, 0);
598 if (!devm_request_region(&pdev->dev, res->start, SIS5595_EXTENT,
599 sis5595_driver.driver.name))
600 return -EBUSY;
601
602 data = devm_kzalloc(&pdev->dev, sizeof(struct sis5595_data),
603 GFP_KERNEL);
604 if (!data)
605 return -ENOMEM;
606
607 mutex_init(&data->lock);
608 mutex_init(&data->update_lock);
609 data->addr = res->start;
610 data->name = "sis5595";
611 platform_set_drvdata(pdev, data);
612
613 /*
614 * Check revision and pin registers to determine whether 4 or 5 voltages
615 */
616 data->revision = s_bridge->revision;
617 /* 4 voltages, 1 temp */
618 data->maxins = 3;
619 if (data->revision >= REV2MIN) {
620 pci_read_config_byte(s_bridge, SIS5595_PIN_REG, &val);
621 if (!(val & 0x80))
622 /* 5 voltages, no temps */
623 data->maxins = 4;
624 }
625
626 /* Initialize the SIS5595 chip */
627 sis5595_init_device(data);
628
629 /* A few vars need to be filled upon startup */
630 for (i = 0; i < 2; i++) {
631 data->fan_min[i] = sis5595_read_value(data,
632 SIS5595_REG_FAN_MIN(i));
633 }
634
635 /* Register sysfs hooks */
636 err = sysfs_create_group(&pdev->dev.kobj, &sis5595_group);
637 if (err)
638 return err;
639 if (data->maxins == 4) {
640 err = sysfs_create_group(&pdev->dev.kobj, &sis5595_group_in4);
641 if (err)
642 goto exit_remove_files;
643 } else {
644 err = sysfs_create_group(&pdev->dev.kobj, &sis5595_group_temp1);
645 if (err)
646 goto exit_remove_files;
647 }
648
649 data->hwmon_dev = hwmon_device_register(&pdev->dev);
650 if (IS_ERR(data->hwmon_dev)) {
651 err = PTR_ERR(data->hwmon_dev);
652 goto exit_remove_files;
653 }
654
655 return 0;
656
657exit_remove_files:
658 sysfs_remove_group(&pdev->dev.kobj, &sis5595_group);
659 sysfs_remove_group(&pdev->dev.kobj, &sis5595_group_in4);
660 sysfs_remove_group(&pdev->dev.kobj, &sis5595_group_temp1);
661 return err;
662}
663
664static int sis5595_remove(struct platform_device *pdev)
665{
666 struct sis5595_data *data = platform_get_drvdata(pdev);
667
668 hwmon_device_unregister(data->hwmon_dev);
669 sysfs_remove_group(&pdev->dev.kobj, &sis5595_group);
670 sysfs_remove_group(&pdev->dev.kobj, &sis5595_group_in4);
671 sysfs_remove_group(&pdev->dev.kobj, &sis5595_group_temp1);
672
673 return 0;
674}
675
676
677/* ISA access must be locked explicitly. */
678static int sis5595_read_value(struct sis5595_data *data, u8 reg)
679{
680 int res;
681
682 mutex_lock(&data->lock);
683 outb_p(reg, data->addr + SIS5595_ADDR_REG_OFFSET);
684 res = inb_p(data->addr + SIS5595_DATA_REG_OFFSET);
685 mutex_unlock(&data->lock);
686 return res;
687}
688
689static void sis5595_write_value(struct sis5595_data *data, u8 reg, u8 value)
690{
691 mutex_lock(&data->lock);
692 outb_p(reg, data->addr + SIS5595_ADDR_REG_OFFSET);
693 outb_p(value, data->addr + SIS5595_DATA_REG_OFFSET);
694 mutex_unlock(&data->lock);
695}
696
697/* Called when we have found a new SIS5595. */
698static void sis5595_init_device(struct sis5595_data *data)
699{
700 u8 config = sis5595_read_value(data, SIS5595_REG_CONFIG);
701 if (!(config & 0x01))
702 sis5595_write_value(data, SIS5595_REG_CONFIG,
703 (config & 0xf7) | 0x01);
704}
705
706static struct sis5595_data *sis5595_update_device(struct device *dev)
707{
708 struct sis5595_data *data = dev_get_drvdata(dev);
709 int i;
710
711 mutex_lock(&data->update_lock);
712
713 if (time_after(jiffies, data->last_updated + HZ + HZ / 2)
714 || !data->valid) {
715
716 for (i = 0; i <= data->maxins; i++) {
717 data->in[i] =
718 sis5595_read_value(data, SIS5595_REG_IN(i));
719 data->in_min[i] =
720 sis5595_read_value(data,
721 SIS5595_REG_IN_MIN(i));
722 data->in_max[i] =
723 sis5595_read_value(data,
724 SIS5595_REG_IN_MAX(i));
725 }
726 for (i = 0; i < 2; i++) {
727 data->fan[i] =
728 sis5595_read_value(data, SIS5595_REG_FAN(i));
729 data->fan_min[i] =
730 sis5595_read_value(data,
731 SIS5595_REG_FAN_MIN(i));
732 }
733 if (data->maxins == 3) {
734 data->temp =
735 sis5595_read_value(data, SIS5595_REG_TEMP);
736 data->temp_over =
737 sis5595_read_value(data, SIS5595_REG_TEMP_OVER);
738 data->temp_hyst =
739 sis5595_read_value(data, SIS5595_REG_TEMP_HYST);
740 }
741 i = sis5595_read_value(data, SIS5595_REG_FANDIV);
742 data->fan_div[0] = (i >> 4) & 0x03;
743 data->fan_div[1] = i >> 6;
744 data->alarms =
745 sis5595_read_value(data, SIS5595_REG_ALARM1) |
746 (sis5595_read_value(data, SIS5595_REG_ALARM2) << 8);
747 data->last_updated = jiffies;
748 data->valid = 1;
749 }
750
751 mutex_unlock(&data->update_lock);
752
753 return data;
754}
755
756static const struct pci_device_id sis5595_pci_ids[] = {
757 { PCI_DEVICE(PCI_VENDOR_ID_SI, PCI_DEVICE_ID_SI_503) },
758 { 0, }
759};
760
761MODULE_DEVICE_TABLE(pci, sis5595_pci_ids);
762
763static int blacklist[] = {
764 PCI_DEVICE_ID_SI_540,
765 PCI_DEVICE_ID_SI_550,
766 PCI_DEVICE_ID_SI_630,
767 PCI_DEVICE_ID_SI_645,
768 PCI_DEVICE_ID_SI_730,
769 PCI_DEVICE_ID_SI_735,
770 PCI_DEVICE_ID_SI_5511, /*
771 * 5513 chip has the 0008 device but
772 * that ID shows up in other chips so we
773 * use the 5511 ID for recognition
774 */
775 PCI_DEVICE_ID_SI_5597,
776 PCI_DEVICE_ID_SI_5598,
777 0 };
778
779static int sis5595_device_add(unsigned short address)
780{
781 struct resource res = {
782 .start = address,
783 .end = address + SIS5595_EXTENT - 1,
784 .name = "sis5595",
785 .flags = IORESOURCE_IO,
786 };
787 int err;
788
789 err = acpi_check_resource_conflict(&res);
790 if (err)
791 goto exit;
792
793 pdev = platform_device_alloc("sis5595", address);
794 if (!pdev) {
795 err = -ENOMEM;
796 pr_err("Device allocation failed\n");
797 goto exit;
798 }
799
800 err = platform_device_add_resources(pdev, &res, 1);
801 if (err) {
802 pr_err("Device resource addition failed (%d)\n", err);
803 goto exit_device_put;
804 }
805
806 err = platform_device_add(pdev);
807 if (err) {
808 pr_err("Device addition failed (%d)\n", err);
809 goto exit_device_put;
810 }
811
812 return 0;
813
814exit_device_put:
815 platform_device_put(pdev);
816exit:
817 return err;
818}
819
820static int sis5595_pci_probe(struct pci_dev *dev,
821 const struct pci_device_id *id)
822{
823 u16 address;
824 u8 enable;
825 int *i;
826
827 for (i = blacklist; *i != 0; i++) {
828 struct pci_dev *d;
829 d = pci_get_device(PCI_VENDOR_ID_SI, *i, NULL);
830 if (d) {
831 dev_err(&d->dev,
832 "Looked for SIS5595 but found unsupported device %.4x\n",
833 *i);
834 pci_dev_put(d);
835 return -ENODEV;
836 }
837 }
838
839 force_addr &= ~(SIS5595_EXTENT - 1);
840 if (force_addr) {
841 dev_warn(&dev->dev, "Forcing ISA address 0x%x\n", force_addr);
842 pci_write_config_word(dev, SIS5595_BASE_REG, force_addr);
843 }
844
845 if (PCIBIOS_SUCCESSFUL !=
846 pci_read_config_word(dev, SIS5595_BASE_REG, &address)) {
847 dev_err(&dev->dev, "Failed to read ISA address\n");
848 return -ENODEV;
849 }
850
851 address &= ~(SIS5595_EXTENT - 1);
852 if (!address) {
853 dev_err(&dev->dev,
854 "Base address not set - upgrade BIOS or use force_addr=0xaddr\n");
855 return -ENODEV;
856 }
857 if (force_addr && address != force_addr) {
858 /* doesn't work for some chips? */
859 dev_err(&dev->dev, "Failed to force ISA address\n");
860 return -ENODEV;
861 }
862
863 if (PCIBIOS_SUCCESSFUL !=
864 pci_read_config_byte(dev, SIS5595_ENABLE_REG, &enable)) {
865 dev_err(&dev->dev, "Failed to read enable register\n");
866 return -ENODEV;
867 }
868 if (!(enable & 0x80)) {
869 if ((PCIBIOS_SUCCESSFUL !=
870 pci_write_config_byte(dev, SIS5595_ENABLE_REG,
871 enable | 0x80))
872 || (PCIBIOS_SUCCESSFUL !=
873 pci_read_config_byte(dev, SIS5595_ENABLE_REG, &enable))
874 || (!(enable & 0x80))) {
875 /* doesn't work for some chips! */
876 dev_err(&dev->dev, "Failed to enable HWM device\n");
877 return -ENODEV;
878 }
879 }
880
881 if (platform_driver_register(&sis5595_driver)) {
882 dev_dbg(&dev->dev, "Failed to register sis5595 driver\n");
883 goto exit;
884 }
885
886 s_bridge = pci_dev_get(dev);
887 /* Sets global pdev as a side effect */
888 if (sis5595_device_add(address))
889 goto exit_unregister;
890
891 /*
892 * Always return failure here. This is to allow other drivers to bind
893 * to this pci device. We don't really want to have control over the
894 * pci device, we only wanted to read as few register values from it.
895 */
896 return -ENODEV;
897
898exit_unregister:
899 pci_dev_put(dev);
900 platform_driver_unregister(&sis5595_driver);
901exit:
902 return -ENODEV;
903}
904
905static struct pci_driver sis5595_pci_driver = {
906 .name = "sis5595",
907 .id_table = sis5595_pci_ids,
908 .probe = sis5595_pci_probe,
909};
910
911static int __init sm_sis5595_init(void)
912{
913 return pci_register_driver(&sis5595_pci_driver);
914}
915
916static void __exit sm_sis5595_exit(void)
917{
918 pci_unregister_driver(&sis5595_pci_driver);
919 if (s_bridge != NULL) {
920 platform_device_unregister(pdev);
921 platform_driver_unregister(&sis5595_driver);
922 pci_dev_put(s_bridge);
923 s_bridge = NULL;
924 }
925}
926
927MODULE_AUTHOR("Aurelien Jarno <aurelien@aurel32.net>");
928MODULE_DESCRIPTION("SiS 5595 Sensor device");
929MODULE_LICENSE("GPL");
930
931module_init(sm_sis5595_init);
932module_exit(sm_sis5595_exit);