1// SPDX-License-Identifier: GPL-2.0-or-later
  2/*
  3 * sis5595.c - Part of lm_sensors, Linux kernel modules
  4 *	       for hardware monitoring
  5 *
  6 * Copyright (C) 1998 - 2001 Frodo Looijaard <frodol@dds.nl>,
  7 *			     Kyösti Mälkki <kmalkki@cc.hut.fi>, and
  8 *			     Mark D. Studebaker <mdsxyz123@yahoo.com>
  9 * Ported to Linux 2.6 by Aurelien Jarno <aurelien@aurel32.net> with
 10 * the help of Jean Delvare <jdelvare@suse.de>
 11 */
 12
 13/*
 14 * SiS southbridge has a LM78-like chip integrated on the same IC.
 15 * This driver is a customized copy of lm78.c
 16 *
 17 * Supports following revisions:
 18 *	Version		PCI ID		PCI Revision
 19 *	1		1039/0008	AF or less
 20 *	2		1039/0008	B0 or greater
 21 *
 22 *  Note: these chips contain a 0008 device which is incompatible with the
 23 *	 5595. We recognize these by the presence of the listed
 24 *	 "blacklist" PCI ID and refuse to load.
 25 *
 26 * NOT SUPPORTED	PCI ID		BLACKLIST PCI ID
 27 *	 540		0008		0540
 28 *	 550		0008		0550
 29 *	5513		0008		5511
 30 *	5581		0008		5597
 31 *	5582		0008		5597
 32 *	5597		0008		5597
 33 *	5598		0008		5597/5598
 34 *	 630		0008		0630
 35 *	 645		0008		0645
 36 *	 730		0008		0730
 37 *	 735		0008		0735
 38 */
 39
 40#define DRIVER_NAME "sis5595"
 41#define pr_fmt(fmt) KBUILD_MODNAME ": " fmt
 42
 43#include <linux/module.h>
 44#include <linux/slab.h>
 45#include <linux/ioport.h>
 46#include <linux/pci.h>
 47#include <linux/platform_device.h>
 48#include <linux/hwmon.h>
 49#include <linux/hwmon-sysfs.h>
 50#include <linux/err.h>
 51#include <linux/init.h>
 52#include <linux/jiffies.h>
 53#include <linux/mutex.h>
 54#include <linux/sysfs.h>
 55#include <linux/acpi.h>
 56#include <linux/io.h>
 57
 58/*
 59 * If force_addr is set to anything different from 0, we forcibly enable
 60 * the device at the given address.
 61 */
 62static u16 force_addr;
 63module_param(force_addr, ushort, 0);
 64MODULE_PARM_DESC(force_addr,
 65		 "Initialize the base address of the sensors");
 66
 67static struct platform_device *pdev;
 68
 69/* Many SIS5595 constants specified below */
 70
 71/* Length of ISA address segment */
 72#define SIS5595_EXTENT 8
 73/* PCI Config Registers */
 74#define SIS5595_BASE_REG 0x68
 75#define SIS5595_PIN_REG 0x7A
 76#define SIS5595_ENABLE_REG 0x7B
 77
 78/* Where are the ISA address/data registers relative to the base address */
 79#define SIS5595_ADDR_REG_OFFSET 5
 80#define SIS5595_DATA_REG_OFFSET 6
 81
 82/* The SIS5595 registers */
 83#define SIS5595_REG_IN_MAX(nr) (0x2b + (nr) * 2)
 84#define SIS5595_REG_IN_MIN(nr) (0x2c + (nr) * 2)
 85#define SIS5595_REG_IN(nr) (0x20 + (nr))
 86
 87#define SIS5595_REG_FAN_MIN(nr) (0x3b + (nr))
 88#define SIS5595_REG_FAN(nr) (0x28 + (nr))
 89
 90/*
 91 * On the first version of the chip, the temp registers are separate.
 92 * On the second version,
 93 * TEMP pin is shared with IN4, configured in PCI register 0x7A.
 94 * The registers are the same as well.
 95 * OVER and HYST are really MAX and MIN.
 96 */
 97
 98#define REV2MIN	0xb0
 99#define SIS5595_REG_TEMP	(((data->revision) >= REV2MIN) ? \
100					SIS5595_REG_IN(4) : 0x27)
101#define SIS5595_REG_TEMP_OVER	(((data->revision) >= REV2MIN) ? \
102					SIS5595_REG_IN_MAX(4) : 0x39)
103#define SIS5595_REG_TEMP_HYST	(((data->revision) >= REV2MIN) ? \
104					SIS5595_REG_IN_MIN(4) : 0x3a)
105
106#define SIS5595_REG_CONFIG 0x40
107#define SIS5595_REG_ALARM1 0x41
108#define SIS5595_REG_ALARM2 0x42
109#define SIS5595_REG_FANDIV 0x47
110
111/*
112 * Conversions. Limit checking is only done on the TO_REG
113 * variants.
114 */
115
116/*
117 * IN: mV, (0V to 4.08V)
118 * REG: 16mV/bit
119 */
120static inline u8 IN_TO_REG(unsigned long val)
121{
122	unsigned long nval = clamp_val(val, 0, 4080);
123	return (nval + 8) / 16;
124}
125#define IN_FROM_REG(val) ((val) *  16)
126
127static inline u8 FAN_TO_REG(long rpm, int div)
128{
129	if (rpm <= 0)
130		return 255;
131	if (rpm > 1350000)
132		return 1;
133	return clamp_val((1350000 + rpm * div / 2) / (rpm * div), 1, 254);
134}
135
136static inline int FAN_FROM_REG(u8 val, int div)
137{
138	return val == 0 ? -1 : val == 255 ? 0 : 1350000 / (val * div);
139}
140
141/*
142 * TEMP: mC (-54.12C to +157.53C)
143 * REG: 0.83C/bit + 52.12, two's complement
144 */
145static inline int TEMP_FROM_REG(s8 val)
146{
147	return val * 830 + 52120;
148}
149static inline s8 TEMP_TO_REG(long val)
150{
151	int nval = clamp_val(val, -54120, 157530) ;
152	return nval < 0 ? (nval - 5212 - 415) / 830 : (nval - 5212 + 415) / 830;
153}
154
155/*
156 * FAN DIV: 1, 2, 4, or 8 (defaults to 2)
157 * REG: 0, 1, 2, or 3 (respectively) (defaults to 1)
158 */
159static inline u8 DIV_TO_REG(int val)
160{
161	return val == 8 ? 3 : val == 4 ? 2 : val == 1 ? 0 : 1;
162}
163#define DIV_FROM_REG(val) (1 << (val))
164
165/*
166 * For each registered chip, we need to keep some data in memory.
167 * The structure is dynamically allocated.
168 */
169struct sis5595_data {
170	unsigned short addr;
171	const char *name;
172	struct device *hwmon_dev;
173	struct mutex lock;
174
175	struct mutex update_lock;
176	bool valid;		/* true if following fields are valid */
177	unsigned long last_updated;	/* In jiffies */
178	char maxins;		/* == 3 if temp enabled, otherwise == 4 */
179	u8 revision;		/* Reg. value */
180
181	u8 in[5];		/* Register value */
182	u8 in_max[5];		/* Register value */
183	u8 in_min[5];		/* Register value */
184	u8 fan[2];		/* Register value */
185	u8 fan_min[2];		/* Register value */
186	s8 temp;		/* Register value */
187	s8 temp_over;		/* Register value */
188	s8 temp_hyst;		/* Register value */
189	u8 fan_div[2];		/* Register encoding, shifted right */
190	u16 alarms;		/* Register encoding, combined */
191};
192
193static struct pci_dev *s_bridge;	/* pointer to the (only) sis5595 */
194
195/* ISA access must be locked explicitly. */
196static int sis5595_read_value(struct sis5595_data *data, u8 reg)
197{
198	int res;
199
200	mutex_lock(&data->lock);
201	outb_p(reg, data->addr + SIS5595_ADDR_REG_OFFSET);
202	res = inb_p(data->addr + SIS5595_DATA_REG_OFFSET);
203	mutex_unlock(&data->lock);
204	return res;
205}
206
207static void sis5595_write_value(struct sis5595_data *data, u8 reg, u8 value)
208{
209	mutex_lock(&data->lock);
210	outb_p(reg, data->addr + SIS5595_ADDR_REG_OFFSET);
211	outb_p(value, data->addr + SIS5595_DATA_REG_OFFSET);
212	mutex_unlock(&data->lock);
213}
214
215static struct sis5595_data *sis5595_update_device(struct device *dev)
216{
217	struct sis5595_data *data = dev_get_drvdata(dev);
218	int i;
219
220	mutex_lock(&data->update_lock);
221
222	if (time_after(jiffies, data->last_updated + HZ + HZ / 2)
223	    || !data->valid) {
224
225		for (i = 0; i <= data->maxins; i++) {
226			data->in[i] =
227			    sis5595_read_value(data, SIS5595_REG_IN(i));
228			data->in_min[i] =
229			    sis5595_read_value(data,
230					       SIS5595_REG_IN_MIN(i));
231			data->in_max[i] =
232			    sis5595_read_value(data,
233					       SIS5595_REG_IN_MAX(i));
234		}
235		for (i = 0; i < 2; i++) {
236			data->fan[i] =
237			    sis5595_read_value(data, SIS5595_REG_FAN(i));
238			data->fan_min[i] =
239			    sis5595_read_value(data,
240					       SIS5595_REG_FAN_MIN(i));
241		}
242		if (data->maxins == 3) {
243			data->temp =
244			    sis5595_read_value(data, SIS5595_REG_TEMP);
245			data->temp_over =
246			    sis5595_read_value(data, SIS5595_REG_TEMP_OVER);
247			data->temp_hyst =
248			    sis5595_read_value(data, SIS5595_REG_TEMP_HYST);
249		}
250		i = sis5595_read_value(data, SIS5595_REG_FANDIV);
251		data->fan_div[0] = (i >> 4) & 0x03;
252		data->fan_div[1] = i >> 6;
253		data->alarms =
254		    sis5595_read_value(data, SIS5595_REG_ALARM1) |
255		    (sis5595_read_value(data, SIS5595_REG_ALARM2) << 8);
256		data->last_updated = jiffies;
257		data->valid = true;
258	}
259
260	mutex_unlock(&data->update_lock);
261
262	return data;
263}
264
265/* 4 Voltages */
266static ssize_t in_show(struct device *dev, struct device_attribute *da,
267		       char *buf)
268{
269	struct sis5595_data *data = sis5595_update_device(dev);
270	struct sensor_device_attribute *attr = to_sensor_dev_attr(da);
271	int nr = attr->index;
272	return sprintf(buf, "%d\n", IN_FROM_REG(data->in[nr]));
273}
274
275static ssize_t in_min_show(struct device *dev, struct device_attribute *da,
276			   char *buf)
277{
278	struct sis5595_data *data = sis5595_update_device(dev);
279	struct sensor_device_attribute *attr = to_sensor_dev_attr(da);
280	int nr = attr->index;
281	return sprintf(buf, "%d\n", IN_FROM_REG(data->in_min[nr]));
282}
283
284static ssize_t in_max_show(struct device *dev, struct device_attribute *da,
285			   char *buf)
286{
287	struct sis5595_data *data = sis5595_update_device(dev);
288	struct sensor_device_attribute *attr = to_sensor_dev_attr(da);
289	int nr = attr->index;
290	return sprintf(buf, "%d\n", IN_FROM_REG(data->in_max[nr]));
291}
292
293static ssize_t in_min_store(struct device *dev, struct device_attribute *da,
294			    const char *buf, size_t count)
295{
296	struct sis5595_data *data = dev_get_drvdata(dev);
297	struct sensor_device_attribute *attr = to_sensor_dev_attr(da);
298	int nr = attr->index;
299	unsigned long val;
300	int err;
301
302	err = kstrtoul(buf, 10, &val);
303	if (err)
304		return err;
305
306	mutex_lock(&data->update_lock);
307	data->in_min[nr] = IN_TO_REG(val);
308	sis5595_write_value(data, SIS5595_REG_IN_MIN(nr), data->in_min[nr]);
309	mutex_unlock(&data->update_lock);
310	return count;
311}
312
313static ssize_t in_max_store(struct device *dev, struct device_attribute *da,
314			    const char *buf, size_t count)
315{
316	struct sis5595_data *data = dev_get_drvdata(dev);
317	struct sensor_device_attribute *attr = to_sensor_dev_attr(da);
318	int nr = attr->index;
319	unsigned long val;
320	int err;
321
322	err = kstrtoul(buf, 10, &val);
323	if (err)
324		return err;
325
326	mutex_lock(&data->update_lock);
327	data->in_max[nr] = IN_TO_REG(val);
328	sis5595_write_value(data, SIS5595_REG_IN_MAX(nr), data->in_max[nr]);
329	mutex_unlock(&data->update_lock);
330	return count;
331}
332
333static SENSOR_DEVICE_ATTR_RO(in0_input, in, 0);
334static SENSOR_DEVICE_ATTR_RW(in0_min, in_min, 0);
335static SENSOR_DEVICE_ATTR_RW(in0_max, in_max, 0);
336static SENSOR_DEVICE_ATTR_RO(in1_input, in, 1);
337static SENSOR_DEVICE_ATTR_RW(in1_min, in_min, 1);
338static SENSOR_DEVICE_ATTR_RW(in1_max, in_max, 1);
339static SENSOR_DEVICE_ATTR_RO(in2_input, in, 2);
340static SENSOR_DEVICE_ATTR_RW(in2_min, in_min, 2);
341static SENSOR_DEVICE_ATTR_RW(in2_max, in_max, 2);
342static SENSOR_DEVICE_ATTR_RO(in3_input, in, 3);
343static SENSOR_DEVICE_ATTR_RW(in3_min, in_min, 3);
344static SENSOR_DEVICE_ATTR_RW(in3_max, in_max, 3);
345static SENSOR_DEVICE_ATTR_RO(in4_input, in, 4);
346static SENSOR_DEVICE_ATTR_RW(in4_min, in_min, 4);
347static SENSOR_DEVICE_ATTR_RW(in4_max, in_max, 4);
348
349/* Temperature */
350static ssize_t temp1_input_show(struct device *dev,
351				struct device_attribute *attr, char *buf)
352{
353	struct sis5595_data *data = sis5595_update_device(dev);
354	return sprintf(buf, "%d\n", TEMP_FROM_REG(data->temp));
355}
356
357static ssize_t temp1_max_show(struct device *dev, struct device_attribute *attr,
358			      char *buf)
359{
360	struct sis5595_data *data = sis5595_update_device(dev);
361	return sprintf(buf, "%d\n", TEMP_FROM_REG(data->temp_over));
362}
363
364static ssize_t temp1_max_store(struct device *dev,
365			       struct device_attribute *attr, const char *buf,
366			       size_t count)
367{
368	struct sis5595_data *data = dev_get_drvdata(dev);
369	long val;
370	int err;
371
372	err = kstrtol(buf, 10, &val);
373	if (err)
374		return err;
375
376	mutex_lock(&data->update_lock);
377	data->temp_over = TEMP_TO_REG(val);
378	sis5595_write_value(data, SIS5595_REG_TEMP_OVER, data->temp_over);
379	mutex_unlock(&data->update_lock);
380	return count;
381}
382
383static ssize_t temp1_max_hyst_show(struct device *dev,
384				   struct device_attribute *attr, char *buf)
385{
386	struct sis5595_data *data = sis5595_update_device(dev);
387	return sprintf(buf, "%d\n", TEMP_FROM_REG(data->temp_hyst));
388}
389
390static ssize_t temp1_max_hyst_store(struct device *dev,
391				    struct device_attribute *attr,
392				    const char *buf, size_t count)
393{
394	struct sis5595_data *data = dev_get_drvdata(dev);
395	long val;
396	int err;
397
398	err = kstrtol(buf, 10, &val);
399	if (err)
400		return err;
401
402	mutex_lock(&data->update_lock);
403	data->temp_hyst = TEMP_TO_REG(val);
404	sis5595_write_value(data, SIS5595_REG_TEMP_HYST, data->temp_hyst);
405	mutex_unlock(&data->update_lock);
406	return count;
407}
408
409static DEVICE_ATTR_RO(temp1_input);
410static DEVICE_ATTR_RW(temp1_max);
411static DEVICE_ATTR_RW(temp1_max_hyst);
412
413/* 2 Fans */
414static ssize_t fan_show(struct device *dev, struct device_attribute *da,
415			char *buf)
416{
417	struct sis5595_data *data = sis5595_update_device(dev);
418	struct sensor_device_attribute *attr = to_sensor_dev_attr(da);
419	int nr = attr->index;
420	return sprintf(buf, "%d\n", FAN_FROM_REG(data->fan[nr],
421		DIV_FROM_REG(data->fan_div[nr])));
422}
423
424static ssize_t fan_min_show(struct device *dev, struct device_attribute *da,
425			    char *buf)
426{
427	struct sis5595_data *data = sis5595_update_device(dev);
428	struct sensor_device_attribute *attr = to_sensor_dev_attr(da);
429	int nr = attr->index;
430	return sprintf(buf, "%d\n", FAN_FROM_REG(data->fan_min[nr],
431		DIV_FROM_REG(data->fan_div[nr])));
432}
433
434static ssize_t fan_min_store(struct device *dev, struct device_attribute *da,
435			     const char *buf, size_t count)
436{
437	struct sis5595_data *data = dev_get_drvdata(dev);
438	struct sensor_device_attribute *attr = to_sensor_dev_attr(da);
439	int nr = attr->index;
440	unsigned long val;
441	int err;
442
443	err = kstrtoul(buf, 10, &val);
444	if (err)
445		return err;
446
447	mutex_lock(&data->update_lock);
448	data->fan_min[nr] = FAN_TO_REG(val, DIV_FROM_REG(data->fan_div[nr]));
449	sis5595_write_value(data, SIS5595_REG_FAN_MIN(nr), data->fan_min[nr]);
450	mutex_unlock(&data->update_lock);
451	return count;
452}
453
454static ssize_t fan_div_show(struct device *dev, struct device_attribute *da,
455			    char *buf)
456{
457	struct sis5595_data *data = sis5595_update_device(dev);
458	struct sensor_device_attribute *attr = to_sensor_dev_attr(da);
459	int nr = attr->index;
460	return sprintf(buf, "%d\n", DIV_FROM_REG(data->fan_div[nr]));
461}
462
463/*
464 * Note: we save and restore the fan minimum here, because its value is
465 * determined in part by the fan divisor.  This follows the principle of
466 * least surprise; the user doesn't expect the fan minimum to change just
467 * because the divisor changed.
468 */
469static ssize_t fan_div_store(struct device *dev, struct device_attribute *da,
470			     const char *buf, size_t count)
471{
472	struct sis5595_data *data = dev_get_drvdata(dev);
473	struct sensor_device_attribute *attr = to_sensor_dev_attr(da);
474	int nr = attr->index;
475	unsigned long min;
476	int reg;
477	unsigned long val;
478	int err;
479
480	err = kstrtoul(buf, 10, &val);
481	if (err)
482		return err;
483
484	mutex_lock(&data->update_lock);
485	min = FAN_FROM_REG(data->fan_min[nr],
486			DIV_FROM_REG(data->fan_div[nr]));
487	reg = sis5595_read_value(data, SIS5595_REG_FANDIV);
488
489	switch (val) {
490	case 1:
491		data->fan_div[nr] = 0;
492		break;
493	case 2:
494		data->fan_div[nr] = 1;
495		break;
496	case 4:
497		data->fan_div[nr] = 2;
498		break;
499	case 8:
500		data->fan_div[nr] = 3;
501		break;
502	default:
503		dev_err(dev,
504			"fan_div value %ld not supported. Choose one of 1, 2, 4 or 8!\n",
505			val);
506		mutex_unlock(&data->update_lock);
507		return -EINVAL;
508	}
509
510	switch (nr) {
511	case 0:
512		reg = (reg & 0xcf) | (data->fan_div[nr] << 4);
513		break;
514	case 1:
515		reg = (reg & 0x3f) | (data->fan_div[nr] << 6);
516		break;
517	}
518	sis5595_write_value(data, SIS5595_REG_FANDIV, reg);
519	data->fan_min[nr] =
520		FAN_TO_REG(min, DIV_FROM_REG(data->fan_div[nr]));
521	sis5595_write_value(data, SIS5595_REG_FAN_MIN(nr), data->fan_min[nr]);
522	mutex_unlock(&data->update_lock);
523	return count;
524}
525
526static SENSOR_DEVICE_ATTR_RO(fan1_input, fan, 0);
527static SENSOR_DEVICE_ATTR_RW(fan1_min, fan_min, 0);
528static SENSOR_DEVICE_ATTR_RW(fan1_div, fan_div, 0);
529static SENSOR_DEVICE_ATTR_RO(fan2_input, fan, 1);
530static SENSOR_DEVICE_ATTR_RW(fan2_min, fan_min, 1);
531static SENSOR_DEVICE_ATTR_RW(fan2_div, fan_div, 1);
532
533/* Alarms */
534static ssize_t alarms_show(struct device *dev, struct device_attribute *attr,
535			   char *buf)
536{
537	struct sis5595_data *data = sis5595_update_device(dev);
538	return sprintf(buf, "%d\n", data->alarms);
539}
540static DEVICE_ATTR_RO(alarms);
541
542static ssize_t alarm_show(struct device *dev, struct device_attribute *da,
543			  char *buf)
544{
545	struct sis5595_data *data = sis5595_update_device(dev);
546	int nr = to_sensor_dev_attr(da)->index;
547	return sprintf(buf, "%u\n", (data->alarms >> nr) & 1);
548}
549static SENSOR_DEVICE_ATTR_RO(in0_alarm, alarm, 0);
550static SENSOR_DEVICE_ATTR_RO(in1_alarm, alarm, 1);
551static SENSOR_DEVICE_ATTR_RO(in2_alarm, alarm, 2);
552static SENSOR_DEVICE_ATTR_RO(in3_alarm, alarm, 3);
553static SENSOR_DEVICE_ATTR_RO(in4_alarm, alarm, 15);
554static SENSOR_DEVICE_ATTR_RO(fan1_alarm, alarm, 6);
555static SENSOR_DEVICE_ATTR_RO(fan2_alarm, alarm, 7);
556static SENSOR_DEVICE_ATTR_RO(temp1_alarm, alarm, 15);
557
558static ssize_t name_show(struct device *dev, struct device_attribute *attr,
559			 char *buf)
560{
561	struct sis5595_data *data = dev_get_drvdata(dev);
562	return sprintf(buf, "%s\n", data->name);
563}
564static DEVICE_ATTR_RO(name);
565
566static struct attribute *sis5595_attributes[] = {
567	&sensor_dev_attr_in0_input.dev_attr.attr,
568	&sensor_dev_attr_in0_min.dev_attr.attr,
569	&sensor_dev_attr_in0_max.dev_attr.attr,
570	&sensor_dev_attr_in0_alarm.dev_attr.attr,
571	&sensor_dev_attr_in1_input.dev_attr.attr,
572	&sensor_dev_attr_in1_min.dev_attr.attr,
573	&sensor_dev_attr_in1_max.dev_attr.attr,
574	&sensor_dev_attr_in1_alarm.dev_attr.attr,
575	&sensor_dev_attr_in2_input.dev_attr.attr,
576	&sensor_dev_attr_in2_min.dev_attr.attr,
577	&sensor_dev_attr_in2_max.dev_attr.attr,
578	&sensor_dev_attr_in2_alarm.dev_attr.attr,
579	&sensor_dev_attr_in3_input.dev_attr.attr,
580	&sensor_dev_attr_in3_min.dev_attr.attr,
581	&sensor_dev_attr_in3_max.dev_attr.attr,
582	&sensor_dev_attr_in3_alarm.dev_attr.attr,
583
584	&sensor_dev_attr_fan1_input.dev_attr.attr,
585	&sensor_dev_attr_fan1_min.dev_attr.attr,
586	&sensor_dev_attr_fan1_div.dev_attr.attr,
587	&sensor_dev_attr_fan1_alarm.dev_attr.attr,
588	&sensor_dev_attr_fan2_input.dev_attr.attr,
589	&sensor_dev_attr_fan2_min.dev_attr.attr,
590	&sensor_dev_attr_fan2_div.dev_attr.attr,
591	&sensor_dev_attr_fan2_alarm.dev_attr.attr,
592
593	&dev_attr_alarms.attr,
594	&dev_attr_name.attr,
595	NULL
596};
597
598static const struct attribute_group sis5595_group = {
599	.attrs = sis5595_attributes,
600};
601
602static struct attribute *sis5595_attributes_in4[] = {
603	&sensor_dev_attr_in4_input.dev_attr.attr,
604	&sensor_dev_attr_in4_min.dev_attr.attr,
605	&sensor_dev_attr_in4_max.dev_attr.attr,
606	&sensor_dev_attr_in4_alarm.dev_attr.attr,
607	NULL
608};
609
610static const struct attribute_group sis5595_group_in4 = {
611	.attrs = sis5595_attributes_in4,
612};
613
614static struct attribute *sis5595_attributes_temp1[] = {
615	&dev_attr_temp1_input.attr,
616	&dev_attr_temp1_max.attr,
617	&dev_attr_temp1_max_hyst.attr,
618	&sensor_dev_attr_temp1_alarm.dev_attr.attr,
619	NULL
620};
621
622static const struct attribute_group sis5595_group_temp1 = {
623	.attrs = sis5595_attributes_temp1,
624};
625
626/* Called when we have found a new SIS5595. */
627static void sis5595_init_device(struct sis5595_data *data)
628{
629	u8 config = sis5595_read_value(data, SIS5595_REG_CONFIG);
630	if (!(config & 0x01))
631		sis5595_write_value(data, SIS5595_REG_CONFIG,
632				(config & 0xf7) | 0x01);
633}
634
635/* This is called when the module is loaded */
636static int sis5595_probe(struct platform_device *pdev)
637{
638	int err = 0;
639	int i;
640	struct sis5595_data *data;
641	struct resource *res;
642	char val;
643
644	/* Reserve the ISA region */
645	res = platform_get_resource(pdev, IORESOURCE_IO, 0);
646	if (!devm_request_region(&pdev->dev, res->start, SIS5595_EXTENT,
647				 DRIVER_NAME))
648		return -EBUSY;
649
650	data = devm_kzalloc(&pdev->dev, sizeof(struct sis5595_data),
651			    GFP_KERNEL);
652	if (!data)
653		return -ENOMEM;
654
655	mutex_init(&data->lock);
656	mutex_init(&data->update_lock);
657	data->addr = res->start;
658	data->name = DRIVER_NAME;
659	platform_set_drvdata(pdev, data);
660
661	/*
662	 * Check revision and pin registers to determine whether 4 or 5 voltages
663	 */
664	data->revision = s_bridge->revision;
665	/* 4 voltages, 1 temp */
666	data->maxins = 3;
667	if (data->revision >= REV2MIN) {
668		pci_read_config_byte(s_bridge, SIS5595_PIN_REG, &val);
669		if (!(val & 0x80))
670			/* 5 voltages, no temps */
671			data->maxins = 4;
672	}
673
674	/* Initialize the SIS5595 chip */
675	sis5595_init_device(data);
676
677	/* A few vars need to be filled upon startup */
678	for (i = 0; i < 2; i++) {
679		data->fan_min[i] = sis5595_read_value(data,
680					SIS5595_REG_FAN_MIN(i));
681	}
682
683	/* Register sysfs hooks */
684	err = sysfs_create_group(&pdev->dev.kobj, &sis5595_group);
685	if (err)
686		return err;
687	if (data->maxins == 4) {
688		err = sysfs_create_group(&pdev->dev.kobj, &sis5595_group_in4);
689		if (err)
690			goto exit_remove_files;
691	} else {
692		err = sysfs_create_group(&pdev->dev.kobj, &sis5595_group_temp1);
693		if (err)
694			goto exit_remove_files;
695	}
696
697	data->hwmon_dev = hwmon_device_register(&pdev->dev);
698	if (IS_ERR(data->hwmon_dev)) {
699		err = PTR_ERR(data->hwmon_dev);
700		goto exit_remove_files;
701	}
702
703	return 0;
704
705exit_remove_files:
706	sysfs_remove_group(&pdev->dev.kobj, &sis5595_group);
707	sysfs_remove_group(&pdev->dev.kobj, &sis5595_group_in4);
708	sysfs_remove_group(&pdev->dev.kobj, &sis5595_group_temp1);
709	return err;
710}
711
712static void sis5595_remove(struct platform_device *pdev)
713{
714	struct sis5595_data *data = platform_get_drvdata(pdev);
715
716	hwmon_device_unregister(data->hwmon_dev);
717	sysfs_remove_group(&pdev->dev.kobj, &sis5595_group);
718	sysfs_remove_group(&pdev->dev.kobj, &sis5595_group_in4);
719	sysfs_remove_group(&pdev->dev.kobj, &sis5595_group_temp1);
 
 
720}
721
722static const struct pci_device_id sis5595_pci_ids[] = {
723	{ PCI_DEVICE(PCI_VENDOR_ID_SI, PCI_DEVICE_ID_SI_503) },
724	{ 0, }
725};
726
727MODULE_DEVICE_TABLE(pci, sis5595_pci_ids);
728
729static int blacklist[] = {
730	PCI_DEVICE_ID_SI_540,
731	PCI_DEVICE_ID_SI_550,
732	PCI_DEVICE_ID_SI_630,
733	PCI_DEVICE_ID_SI_645,
734	PCI_DEVICE_ID_SI_730,
735	PCI_DEVICE_ID_SI_735,
736	PCI_DEVICE_ID_SI_5511, /*
737				* 5513 chip has the 0008 device but
738				* that ID shows up in other chips so we
739				* use the 5511 ID for recognition
740				*/
741	PCI_DEVICE_ID_SI_5597,
742	PCI_DEVICE_ID_SI_5598,
743	0 };
744
745static int sis5595_device_add(unsigned short address)
746{
747	struct resource res = {
748		.start	= address,
749		.end	= address + SIS5595_EXTENT - 1,
750		.name	= DRIVER_NAME,
751		.flags	= IORESOURCE_IO,
752	};
753	int err;
754
755	err = acpi_check_resource_conflict(&res);
756	if (err)
757		goto exit;
758
759	pdev = platform_device_alloc(DRIVER_NAME, address);
760	if (!pdev) {
761		err = -ENOMEM;
762		pr_err("Device allocation failed\n");
763		goto exit;
764	}
765
766	err = platform_device_add_resources(pdev, &res, 1);
767	if (err) {
768		pr_err("Device resource addition failed (%d)\n", err);
769		goto exit_device_put;
770	}
771
772	err = platform_device_add(pdev);
773	if (err) {
774		pr_err("Device addition failed (%d)\n", err);
775		goto exit_device_put;
776	}
777
778	return 0;
779
780exit_device_put:
781	platform_device_put(pdev);
782exit:
783	return err;
784}
785
786static struct platform_driver sis5595_driver = {
787	.driver = {
788		.name	= DRIVER_NAME,
789	},
790	.probe		= sis5595_probe,
791	.remove_new	= sis5595_remove,
792};
793
794static int sis5595_pci_probe(struct pci_dev *dev,
795				       const struct pci_device_id *id)
796{
797	u16 address;
798	u8 enable;
799	int *i, err;
800
801	for (i = blacklist; *i != 0; i++) {
802		struct pci_dev *d;
803		d = pci_get_device(PCI_VENDOR_ID_SI, *i, NULL);
804		if (d) {
805			dev_err(&d->dev,
806				"Looked for SIS5595 but found unsupported device %.4x\n",
807				*i);
808			pci_dev_put(d);
809			return -ENODEV;
810		}
811	}
812
813	force_addr &= ~(SIS5595_EXTENT - 1);
814	if (force_addr) {
815		dev_warn(&dev->dev, "Forcing ISA address 0x%x\n", force_addr);
816		pci_write_config_word(dev, SIS5595_BASE_REG, force_addr);
817	}
818
819	err = pci_read_config_word(dev, SIS5595_BASE_REG, &address);
820	if (err != PCIBIOS_SUCCESSFUL) {
821		dev_err(&dev->dev, "Failed to read ISA address\n");
822		return -ENODEV;
823	}
824
825	address &= ~(SIS5595_EXTENT - 1);
826	if (!address) {
827		dev_err(&dev->dev,
828			"Base address not set - upgrade BIOS or use force_addr=0xaddr\n");
829		return -ENODEV;
830	}
831	if (force_addr && address != force_addr) {
832		/* doesn't work for some chips? */
833		dev_err(&dev->dev, "Failed to force ISA address\n");
834		return -ENODEV;
835	}
836
837	err = pci_read_config_byte(dev, SIS5595_ENABLE_REG, &enable);
838	if (err != PCIBIOS_SUCCESSFUL) {
839		dev_err(&dev->dev, "Failed to read enable register\n");
840		return -ENODEV;
841	}
842	if (!(enable & 0x80)) {
843		err = pci_write_config_byte(dev, SIS5595_ENABLE_REG, enable | 0x80);
844		if (err != PCIBIOS_SUCCESSFUL)
845			goto enable_fail;
846
847		err = pci_read_config_byte(dev, SIS5595_ENABLE_REG, &enable);
848		if (err != PCIBIOS_SUCCESSFUL)
849			goto enable_fail;
850
851		/* doesn't work for some chips! */
852		if (!(enable & 0x80))
853			goto enable_fail;
854	}
855
856	if (platform_driver_register(&sis5595_driver)) {
857		dev_dbg(&dev->dev, "Failed to register sis5595 driver\n");
858		goto exit;
859	}
860
861	s_bridge = pci_dev_get(dev);
862	/* Sets global pdev as a side effect */
863	if (sis5595_device_add(address))
864		goto exit_unregister;
865
866	/*
867	 * Always return failure here.  This is to allow other drivers to bind
868	 * to this pci device.  We don't really want to have control over the
869	 * pci device, we only wanted to read as few register values from it.
870	 */
871	return -ENODEV;
872
873enable_fail:
874	dev_err(&dev->dev, "Failed to enable HWM device\n");
875	goto exit;
876
877exit_unregister:
878	pci_dev_put(dev);
879	platform_driver_unregister(&sis5595_driver);
880exit:
881	return -ENODEV;
882}
883
884static struct pci_driver sis5595_pci_driver = {
885	.name            = DRIVER_NAME,
886	.id_table        = sis5595_pci_ids,
887	.probe           = sis5595_pci_probe,
888};
889
890static int __init sm_sis5595_init(void)
891{
892	return pci_register_driver(&sis5595_pci_driver);
893}
894
895static void __exit sm_sis5595_exit(void)
896{
897	pci_unregister_driver(&sis5595_pci_driver);
898	if (s_bridge != NULL) {
899		platform_device_unregister(pdev);
900		platform_driver_unregister(&sis5595_driver);
901		pci_dev_put(s_bridge);
902		s_bridge = NULL;
903	}
904}
905
906MODULE_AUTHOR("Aurelien Jarno <aurelien@aurel32.net>");
907MODULE_DESCRIPTION("SiS 5595 Sensor device");
908MODULE_LICENSE("GPL");
909
910module_init(sm_sis5595_init);
911module_exit(sm_sis5595_exit);