1// SPDX-License-Identifier: GPL-2.0-only
   2/*
   3 * w83793.c - Linux kernel driver for hardware monitoring
   4 * Copyright (C) 2006 Winbond Electronics Corp.
   5 *	      Yuan Mu
   6 *	      Rudolf Marek <r.marek@assembler.cz>
   7 * Copyright (C) 2009-2010 Sven Anders <anders@anduras.de>, ANDURAS AG.
   8 *		Watchdog driver part
   9 *		(Based partially on fschmd driver,
  10 *		 Copyright 2007-2008 by Hans de Goede)
  11 */
  12
  13/*
  14 * Supports following chips:
  15 *
  16 * Chip	#vin	#fanin	#pwm	#temp	wchipid	vendid	i2c	ISA
  17 * w83793	10	12	8	6	0x7b	0x5ca3	yes	no
  18 */
  19
  20#include <linux/module.h>
  21#include <linux/init.h>
  22#include <linux/slab.h>
  23#include <linux/i2c.h>
  24#include <linux/hwmon.h>
  25#include <linux/hwmon-vid.h>
  26#include <linux/hwmon-sysfs.h>
  27#include <linux/err.h>
  28#include <linux/mutex.h>
  29#include <linux/fs.h>
  30#include <linux/watchdog.h>
  31#include <linux/miscdevice.h>
  32#include <linux/uaccess.h>
  33#include <linux/kref.h>
  34#include <linux/notifier.h>
  35#include <linux/reboot.h>
  36#include <linux/jiffies.h>
  37
  38/* Default values */
  39#define WATCHDOG_TIMEOUT 2	/* 2 minute default timeout */
  40
  41/* Addresses to scan */
  42static const unsigned short normal_i2c[] = { 0x2c, 0x2d, 0x2e, 0x2f,
  43						I2C_CLIENT_END };
  44
  45/* Insmod parameters */
  46
  47static unsigned short force_subclients[4];
  48module_param_array(force_subclients, short, NULL, 0);
  49MODULE_PARM_DESC(force_subclients,
  50		 "List of subclient addresses: {bus, clientaddr, subclientaddr1, subclientaddr2}");
  51
  52static bool reset;
  53module_param(reset, bool, 0);
  54MODULE_PARM_DESC(reset, "Set to 1 to reset chip, not recommended");
  55
  56static int timeout = WATCHDOG_TIMEOUT;	/* default timeout in minutes */
  57module_param(timeout, int, 0);
  58MODULE_PARM_DESC(timeout,
  59	"Watchdog timeout in minutes. 2<= timeout <=255 (default="
  60				__MODULE_STRING(WATCHDOG_TIMEOUT) ")");
  61
  62static bool nowayout = WATCHDOG_NOWAYOUT;
  63module_param(nowayout, bool, 0);
  64MODULE_PARM_DESC(nowayout,
  65	"Watchdog cannot be stopped once started (default="
  66				__MODULE_STRING(WATCHDOG_NOWAYOUT) ")");
  67
  68/*
  69 * Address 0x00, 0x0d, 0x0e, 0x0f in all three banks are reserved
  70 * as ID, Bank Select registers
  71 */
  72#define W83793_REG_BANKSEL		0x00
  73#define W83793_REG_VENDORID		0x0d
  74#define W83793_REG_CHIPID		0x0e
  75#define W83793_REG_DEVICEID		0x0f
  76
  77#define W83793_REG_CONFIG		0x40
  78#define W83793_REG_MFC			0x58
  79#define W83793_REG_FANIN_CTRL		0x5c
  80#define W83793_REG_FANIN_SEL		0x5d
  81#define W83793_REG_I2C_ADDR		0x0b
  82#define W83793_REG_I2C_SUBADDR		0x0c
  83#define W83793_REG_VID_INA		0x05
  84#define W83793_REG_VID_INB		0x06
  85#define W83793_REG_VID_LATCHA		0x07
  86#define W83793_REG_VID_LATCHB		0x08
  87#define W83793_REG_VID_CTRL		0x59
  88
  89#define W83793_REG_WDT_LOCK		0x01
  90#define W83793_REG_WDT_ENABLE		0x02
  91#define W83793_REG_WDT_STATUS		0x03
  92#define W83793_REG_WDT_TIMEOUT		0x04
  93
  94static u16 W83793_REG_TEMP_MODE[2] = { 0x5e, 0x5f };
  95
  96#define TEMP_READ	0
  97#define TEMP_CRIT	1
  98#define TEMP_CRIT_HYST	2
  99#define TEMP_WARN	3
 100#define TEMP_WARN_HYST	4
 101/*
 102 * only crit and crit_hyst affect real-time alarm status
 103 * current crit crit_hyst warn warn_hyst
 104 */
 105static u16 W83793_REG_TEMP[][5] = {
 106	{0x1c, 0x78, 0x79, 0x7a, 0x7b},
 107	{0x1d, 0x7c, 0x7d, 0x7e, 0x7f},
 108	{0x1e, 0x80, 0x81, 0x82, 0x83},
 109	{0x1f, 0x84, 0x85, 0x86, 0x87},
 110	{0x20, 0x88, 0x89, 0x8a, 0x8b},
 111	{0x21, 0x8c, 0x8d, 0x8e, 0x8f},
 112};
 113
 114#define W83793_REG_TEMP_LOW_BITS	0x22
 115
 116#define W83793_REG_BEEP(index)		(0x53 + (index))
 117#define W83793_REG_ALARM(index)		(0x4b + (index))
 118
 119#define W83793_REG_CLR_CHASSIS		0x4a	/* SMI MASK4 */
 120#define W83793_REG_IRQ_CTRL		0x50
 121#define W83793_REG_OVT_CTRL		0x51
 122#define W83793_REG_OVT_BEEP		0x52
 123
 124#define IN_READ				0
 125#define IN_MAX				1
 126#define IN_LOW				2
 127static const u16 W83793_REG_IN[][3] = {
 128	/* Current, High, Low */
 129	{0x10, 0x60, 0x61},	/* Vcore A	*/
 130	{0x11, 0x62, 0x63},	/* Vcore B	*/
 131	{0x12, 0x64, 0x65},	/* Vtt		*/
 132	{0x14, 0x6a, 0x6b},	/* VSEN1	*/
 133	{0x15, 0x6c, 0x6d},	/* VSEN2	*/
 134	{0x16, 0x6e, 0x6f},	/* +3VSEN	*/
 135	{0x17, 0x70, 0x71},	/* +12VSEN	*/
 136	{0x18, 0x72, 0x73},	/* 5VDD		*/
 137	{0x19, 0x74, 0x75},	/* 5VSB		*/
 138	{0x1a, 0x76, 0x77},	/* VBAT		*/
 139};
 140
 141/* Low Bits of Vcore A/B Vtt Read/High/Low */
 142static const u16 W83793_REG_IN_LOW_BITS[] = { 0x1b, 0x68, 0x69 };
 143static u8 scale_in[] = { 2, 2, 2, 16, 16, 16, 8, 24, 24, 16 };
 144static u8 scale_in_add[] = { 0, 0, 0, 0, 0, 0, 0, 150, 150, 0 };
 145
 146#define W83793_REG_FAN(index)		(0x23 + 2 * (index))	/* High byte */
 147#define W83793_REG_FAN_MIN(index)	(0x90 + 2 * (index))	/* High byte */
 148
 149#define W83793_REG_PWM_DEFAULT		0xb2
 150#define W83793_REG_PWM_ENABLE		0x207
 151#define W83793_REG_PWM_UPTIME		0xc3	/* Unit in 0.1 second */
 152#define W83793_REG_PWM_DOWNTIME		0xc4	/* Unit in 0.1 second */
 153#define W83793_REG_TEMP_CRITICAL	0xc5
 154
 155#define PWM_DUTY			0
 156#define PWM_START			1
 157#define PWM_NONSTOP			2
 158#define PWM_STOP_TIME			3
 159#define W83793_REG_PWM(index, nr)	(((nr) == 0 ? 0xb3 : \
 160					 (nr) == 1 ? 0x220 : 0x218) + (index))
 161
 162/* bit field, fan1 is bit0, fan2 is bit1 ... */
 163#define W83793_REG_TEMP_FAN_MAP(index)	(0x201 + (index))
 164#define W83793_REG_TEMP_TOL(index)	(0x208 + (index))
 165#define W83793_REG_TEMP_CRUISE(index)	(0x210 + (index))
 166#define W83793_REG_PWM_STOP_TIME(index)	(0x228 + (index))
 167#define W83793_REG_SF2_TEMP(index, nr)	(0x230 + ((index) << 4) + (nr))
 168#define W83793_REG_SF2_PWM(index, nr)	(0x238 + ((index) << 4) + (nr))
 169
 170static inline unsigned long FAN_FROM_REG(u16 val)
 171{
 172	if ((val >= 0xfff) || (val == 0))
 173		return	0;
 174	return 1350000UL / val;
 175}
 176
 177static inline u16 FAN_TO_REG(long rpm)
 178{
 179	if (rpm <= 0)
 180		return 0x0fff;
 181	return clamp_val((1350000 + (rpm >> 1)) / rpm, 1, 0xffe);
 182}
 183
 184static inline unsigned long TIME_FROM_REG(u8 reg)
 185{
 186	return reg * 100;
 187}
 188
 189static inline u8 TIME_TO_REG(unsigned long val)
 190{
 191	return clamp_val((val + 50) / 100, 0, 0xff);
 192}
 193
 194static inline long TEMP_FROM_REG(s8 reg)
 195{
 196	return reg * 1000;
 197}
 198
 199static inline s8 TEMP_TO_REG(long val, s8 min, s8 max)
 200{
 201	return clamp_val((val + (val < 0 ? -500 : 500)) / 1000, min, max);
 202}
 203
 204struct w83793_data {
 205	struct i2c_client *lm75[2];
 206	struct device *hwmon_dev;
 207	struct mutex update_lock;
 208	char valid;			/* !=0 if following fields are valid */
 209	unsigned long last_updated;	/* In jiffies */
 210	unsigned long last_nonvolatile;	/* In jiffies, last time we update the
 211					 * nonvolatile registers
 212					 */
 213
 214	u8 bank;
 215	u8 vrm;
 216	u8 vid[2];
 217	u8 in[10][3];		/* Register value, read/high/low */
 218	u8 in_low_bits[3];	/* Additional resolution for VCore A/B Vtt */
 219
 220	u16 has_fan;		/* Only fan1- fan5 has own pins */
 221	u16 fan[12];		/* Register value combine */
 222	u16 fan_min[12];	/* Register value combine */
 223
 224	s8 temp[6][5];		/* current, crit, crit_hyst,warn, warn_hyst */
 225	u8 temp_low_bits;	/* Additional resolution TD1-TD4 */
 226	u8 temp_mode[2];	/* byte 0: Temp D1-D4 mode each has 2 bits
 227				 * byte 1: Temp R1,R2 mode, each has 1 bit
 228				 */
 229	u8 temp_critical;	/* If reached all fan will be at full speed */
 230	u8 temp_fan_map[6];	/* Temp controls which pwm fan, bit field */
 231
 232	u8 has_pwm;
 233	u8 has_temp;
 234	u8 has_vid;
 235	u8 pwm_enable;		/* Register value, each Temp has 1 bit */
 236	u8 pwm_uptime;		/* Register value */
 237	u8 pwm_downtime;	/* Register value */
 238	u8 pwm_default;		/* All fan default pwm, next poweron valid */
 239	u8 pwm[8][3];		/* Register value */
 240	u8 pwm_stop_time[8];
 241	u8 temp_cruise[6];
 242
 243	u8 alarms[5];		/* realtime status registers */
 244	u8 beeps[5];
 245	u8 beep_enable;
 246	u8 tolerance[3];	/* Temp tolerance(Smart Fan I/II) */
 247	u8 sf2_pwm[6][7];	/* Smart FanII: Fan duty cycle */
 248	u8 sf2_temp[6][7];	/* Smart FanII: Temp level point */
 249
 250	/* watchdog */
 251	struct i2c_client *client;
 252	struct mutex watchdog_lock;
 253	struct list_head list; /* member of the watchdog_data_list */
 254	struct kref kref;
 255	struct miscdevice watchdog_miscdev;
 256	unsigned long watchdog_is_open;
 257	char watchdog_expect_close;
 258	char watchdog_name[10]; /* must be unique to avoid sysfs conflict */
 259	unsigned int watchdog_caused_reboot;
 260	int watchdog_timeout; /* watchdog timeout in minutes */
 261};
 262
 263/*
 264 * Somewhat ugly :( global data pointer list with all devices, so that
 265 * we can find our device data as when using misc_register. There is no
 266 * other method to get to one's device data from the open file-op and
 267 * for usage in the reboot notifier callback.
 268 */
 269static LIST_HEAD(watchdog_data_list);
 270
 271/* Note this lock not only protect list access, but also data.kref access */
 272static DEFINE_MUTEX(watchdog_data_mutex);
 273
 274/*
 275 * Release our data struct when we're detached from the i2c client *and* all
 276 * references to our watchdog device are released
 277 */
 278static void w83793_release_resources(struct kref *ref)
 279{
 280	struct w83793_data *data = container_of(ref, struct w83793_data, kref);
 281	kfree(data);
 282}
 283
 284static u8 w83793_read_value(struct i2c_client *client, u16 reg);
 285static int w83793_write_value(struct i2c_client *client, u16 reg, u8 value);
 286static int w83793_probe(struct i2c_client *client,
 287			const struct i2c_device_id *id);
 288static int w83793_detect(struct i2c_client *client,
 289			 struct i2c_board_info *info);
 290static int w83793_remove(struct i2c_client *client);
 291static void w83793_init_client(struct i2c_client *client);
 292static void w83793_update_nonvolatile(struct device *dev);
 293static struct w83793_data *w83793_update_device(struct device *dev);
 294
 295static const struct i2c_device_id w83793_id[] = {
 296	{ "w83793", 0 },
 297	{ }
 298};
 299MODULE_DEVICE_TABLE(i2c, w83793_id);
 300
 301static struct i2c_driver w83793_driver = {
 302	.class		= I2C_CLASS_HWMON,
 303	.driver = {
 304		   .name = "w83793",
 305	},
 306	.probe		= w83793_probe,
 307	.remove		= w83793_remove,
 308	.id_table	= w83793_id,
 309	.detect		= w83793_detect,
 310	.address_list	= normal_i2c,
 311};
 312
 313static ssize_t
 314vrm_show(struct device *dev, struct device_attribute *attr, char *buf)
 315{
 316	struct w83793_data *data = dev_get_drvdata(dev);
 317	return sprintf(buf, "%d\n", data->vrm);
 318}
 319
 320static ssize_t
 321show_vid(struct device *dev, struct device_attribute *attr, char *buf)
 322{
 323	struct w83793_data *data = w83793_update_device(dev);
 324	struct sensor_device_attribute_2 *sensor_attr =
 325	    to_sensor_dev_attr_2(attr);
 326	int index = sensor_attr->index;
 327
 328	return sprintf(buf, "%d\n", vid_from_reg(data->vid[index], data->vrm));
 329}
 330
 331static ssize_t
 332vrm_store(struct device *dev, struct device_attribute *attr,
 333	  const char *buf, size_t count)
 334{
 335	struct w83793_data *data = dev_get_drvdata(dev);
 336	unsigned long val;
 337	int err;
 338
 339	err = kstrtoul(buf, 10, &val);
 340	if (err)
 341		return err;
 342
 343	if (val > 255)
 344		return -EINVAL;
 345
 346	data->vrm = val;
 347	return count;
 348}
 349
 350#define ALARM_STATUS			0
 351#define BEEP_ENABLE			1
 352static ssize_t
 353show_alarm_beep(struct device *dev, struct device_attribute *attr, char *buf)
 354{
 355	struct w83793_data *data = w83793_update_device(dev);
 356	struct sensor_device_attribute_2 *sensor_attr =
 357	    to_sensor_dev_attr_2(attr);
 358	int nr = sensor_attr->nr;
 359	int index = sensor_attr->index >> 3;
 360	int bit = sensor_attr->index & 0x07;
 361	u8 val;
 362
 363	if (nr == ALARM_STATUS) {
 364		val = (data->alarms[index] >> (bit)) & 1;
 365	} else {		/* BEEP_ENABLE */
 366		val = (data->beeps[index] >> (bit)) & 1;
 367	}
 368
 369	return sprintf(buf, "%u\n", val);
 370}
 371
 372static ssize_t
 373store_beep(struct device *dev, struct device_attribute *attr,
 374	   const char *buf, size_t count)
 375{
 376	struct i2c_client *client = to_i2c_client(dev);
 377	struct w83793_data *data = i2c_get_clientdata(client);
 378	struct sensor_device_attribute_2 *sensor_attr =
 379	    to_sensor_dev_attr_2(attr);
 380	int index = sensor_attr->index >> 3;
 381	int shift = sensor_attr->index & 0x07;
 382	u8 beep_bit = 1 << shift;
 383	unsigned long val;
 384	int err;
 385
 386	err = kstrtoul(buf, 10, &val);
 387	if (err)
 388		return err;
 389
 390	if (val > 1)
 391		return -EINVAL;
 392
 393	mutex_lock(&data->update_lock);
 394	data->beeps[index] = w83793_read_value(client, W83793_REG_BEEP(index));
 395	data->beeps[index] &= ~beep_bit;
 396	data->beeps[index] |= val << shift;
 397	w83793_write_value(client, W83793_REG_BEEP(index), data->beeps[index]);
 398	mutex_unlock(&data->update_lock);
 399
 400	return count;
 401}
 402
 403static ssize_t
 404show_beep_enable(struct device *dev, struct device_attribute *attr, char *buf)
 405{
 406	struct w83793_data *data = w83793_update_device(dev);
 407	return sprintf(buf, "%u\n", (data->beep_enable >> 1) & 0x01);
 408}
 409
 410static ssize_t
 411store_beep_enable(struct device *dev, struct device_attribute *attr,
 412		  const char *buf, size_t count)
 413{
 414	struct i2c_client *client = to_i2c_client(dev);
 415	struct w83793_data *data = i2c_get_clientdata(client);
 416	unsigned long val;
 417	int err;
 418
 419	err = kstrtoul(buf, 10, &val);
 420	if (err)
 421		return err;
 422
 423	if (val > 1)
 424		return -EINVAL;
 425
 426	mutex_lock(&data->update_lock);
 427	data->beep_enable = w83793_read_value(client, W83793_REG_OVT_BEEP)
 428			    & 0xfd;
 429	data->beep_enable |= val << 1;
 430	w83793_write_value(client, W83793_REG_OVT_BEEP, data->beep_enable);
 431	mutex_unlock(&data->update_lock);
 432
 433	return count;
 434}
 435
 436/* Write 0 to clear chassis alarm */
 437static ssize_t
 438store_chassis_clear(struct device *dev,
 439		    struct device_attribute *attr, const char *buf,
 440		    size_t count)
 441{
 442	struct i2c_client *client = to_i2c_client(dev);
 443	struct w83793_data *data = i2c_get_clientdata(client);
 444	unsigned long val;
 445	u8 reg;
 446	int err;
 447
 448	err = kstrtoul(buf, 10, &val);
 449	if (err)
 450		return err;
 451	if (val)
 452		return -EINVAL;
 453
 454	mutex_lock(&data->update_lock);
 455	reg = w83793_read_value(client, W83793_REG_CLR_CHASSIS);
 456	w83793_write_value(client, W83793_REG_CLR_CHASSIS, reg | 0x80);
 457	data->valid = 0;		/* Force cache refresh */
 458	mutex_unlock(&data->update_lock);
 459	return count;
 460}
 461
 462#define FAN_INPUT			0
 463#define FAN_MIN				1
 464static ssize_t
 465show_fan(struct device *dev, struct device_attribute *attr, char *buf)
 466{
 467	struct sensor_device_attribute_2 *sensor_attr =
 468	    to_sensor_dev_attr_2(attr);
 469	int nr = sensor_attr->nr;
 470	int index = sensor_attr->index;
 471	struct w83793_data *data = w83793_update_device(dev);
 472	u16 val;
 473
 474	if (nr == FAN_INPUT)
 475		val = data->fan[index] & 0x0fff;
 476	else
 477		val = data->fan_min[index] & 0x0fff;
 478
 479	return sprintf(buf, "%lu\n", FAN_FROM_REG(val));
 480}
 481
 482static ssize_t
 483store_fan_min(struct device *dev, struct device_attribute *attr,
 484	      const char *buf, size_t count)
 485{
 486	struct sensor_device_attribute_2 *sensor_attr =
 487	    to_sensor_dev_attr_2(attr);
 488	int index = sensor_attr->index;
 489	struct i2c_client *client = to_i2c_client(dev);
 490	struct w83793_data *data = i2c_get_clientdata(client);
 491	unsigned long val;
 492	int err;
 493
 494	err = kstrtoul(buf, 10, &val);
 495	if (err)
 496		return err;
 497	val = FAN_TO_REG(val);
 498
 499	mutex_lock(&data->update_lock);
 500	data->fan_min[index] = val;
 501	w83793_write_value(client, W83793_REG_FAN_MIN(index),
 502			   (val >> 8) & 0xff);
 503	w83793_write_value(client, W83793_REG_FAN_MIN(index) + 1, val & 0xff);
 504	mutex_unlock(&data->update_lock);
 505
 506	return count;
 507}
 508
 509static ssize_t
 510show_pwm(struct device *dev, struct device_attribute *attr, char *buf)
 511{
 512	struct sensor_device_attribute_2 *sensor_attr =
 513	    to_sensor_dev_attr_2(attr);
 514	struct w83793_data *data = w83793_update_device(dev);
 515	u16 val;
 516	int nr = sensor_attr->nr;
 517	int index = sensor_attr->index;
 518
 519	if (nr == PWM_STOP_TIME)
 520		val = TIME_FROM_REG(data->pwm_stop_time[index]);
 521	else
 522		val = (data->pwm[index][nr] & 0x3f) << 2;
 523
 524	return sprintf(buf, "%d\n", val);
 525}
 526
 527static ssize_t
 528store_pwm(struct device *dev, struct device_attribute *attr,
 529	  const char *buf, size_t count)
 530{
 531	struct i2c_client *client = to_i2c_client(dev);
 532	struct w83793_data *data = i2c_get_clientdata(client);
 533	struct sensor_device_attribute_2 *sensor_attr =
 534	    to_sensor_dev_attr_2(attr);
 535	int nr = sensor_attr->nr;
 536	int index = sensor_attr->index;
 537	unsigned long val;
 538	int err;
 539
 540	err = kstrtoul(buf, 10, &val);
 541	if (err)
 542		return err;
 543
 544	mutex_lock(&data->update_lock);
 545	if (nr == PWM_STOP_TIME) {
 546		val = TIME_TO_REG(val);
 547		data->pwm_stop_time[index] = val;
 548		w83793_write_value(client, W83793_REG_PWM_STOP_TIME(index),
 549				   val);
 550	} else {
 551		val = clamp_val(val, 0, 0xff) >> 2;
 552		data->pwm[index][nr] =
 553		    w83793_read_value(client, W83793_REG_PWM(index, nr)) & 0xc0;
 554		data->pwm[index][nr] |= val;
 555		w83793_write_value(client, W83793_REG_PWM(index, nr),
 556							data->pwm[index][nr]);
 557	}
 558
 559	mutex_unlock(&data->update_lock);
 560	return count;
 561}
 562
 563static ssize_t
 564show_temp(struct device *dev, struct device_attribute *attr, char *buf)
 565{
 566	struct sensor_device_attribute_2 *sensor_attr =
 567	    to_sensor_dev_attr_2(attr);
 568	int nr = sensor_attr->nr;
 569	int index = sensor_attr->index;
 570	struct w83793_data *data = w83793_update_device(dev);
 571	long temp = TEMP_FROM_REG(data->temp[index][nr]);
 572
 573	if (nr == TEMP_READ && index < 4) {	/* Only TD1-TD4 have low bits */
 574		int low = ((data->temp_low_bits >> (index * 2)) & 0x03) * 250;
 575		temp += temp > 0 ? low : -low;
 576	}
 577	return sprintf(buf, "%ld\n", temp);
 578}
 579
 580static ssize_t
 581store_temp(struct device *dev, struct device_attribute *attr,
 582	   const char *buf, size_t count)
 583{
 584	struct sensor_device_attribute_2 *sensor_attr =
 585	    to_sensor_dev_attr_2(attr);
 586	int nr = sensor_attr->nr;
 587	int index = sensor_attr->index;
 588	struct i2c_client *client = to_i2c_client(dev);
 589	struct w83793_data *data = i2c_get_clientdata(client);
 590	long tmp;
 591	int err;
 592
 593	err = kstrtol(buf, 10, &tmp);
 594	if (err)
 595		return err;
 596
 597	mutex_lock(&data->update_lock);
 598	data->temp[index][nr] = TEMP_TO_REG(tmp, -128, 127);
 599	w83793_write_value(client, W83793_REG_TEMP[index][nr],
 600			   data->temp[index][nr]);
 601	mutex_unlock(&data->update_lock);
 602	return count;
 603}
 604
 605/*
 606 * TD1-TD4
 607 * each has 4 mode:(2 bits)
 608 * 0:	Stop monitor
 609 * 1:	Use internal temp sensor(default)
 610 * 2:	Reserved
 611 * 3:	Use sensor in Intel CPU and get result by PECI
 612 *
 613 * TR1-TR2
 614 * each has 2 mode:(1 bit)
 615 * 0:	Disable temp sensor monitor
 616 * 1:	To enable temp sensors monitor
 617 */
 618
 619/* 0 disable, 6 PECI */
 620static u8 TO_TEMP_MODE[] = { 0, 0, 0, 6 };
 621
 622static ssize_t
 623show_temp_mode(struct device *dev, struct device_attribute *attr, char *buf)
 624{
 625	struct w83793_data *data = w83793_update_device(dev);
 626	struct sensor_device_attribute_2 *sensor_attr =
 627	    to_sensor_dev_attr_2(attr);
 628	int index = sensor_attr->index;
 629	u8 mask = (index < 4) ? 0x03 : 0x01;
 630	u8 shift = (index < 4) ? (2 * index) : (index - 4);
 631	u8 tmp;
 632	index = (index < 4) ? 0 : 1;
 633
 634	tmp = (data->temp_mode[index] >> shift) & mask;
 635
 636	/* for the internal sensor, found out if diode or thermistor */
 637	if (tmp == 1)
 638		tmp = index == 0 ? 3 : 4;
 639	else
 640		tmp = TO_TEMP_MODE[tmp];
 641
 642	return sprintf(buf, "%d\n", tmp);
 643}
 644
 645static ssize_t
 646store_temp_mode(struct device *dev, struct device_attribute *attr,
 647		const char *buf, size_t count)
 648{
 649	struct i2c_client *client = to_i2c_client(dev);
 650	struct w83793_data *data = i2c_get_clientdata(client);
 651	struct sensor_device_attribute_2 *sensor_attr =
 652	    to_sensor_dev_attr_2(attr);
 653	int index = sensor_attr->index;
 654	u8 mask = (index < 4) ? 0x03 : 0x01;
 655	u8 shift = (index < 4) ? (2 * index) : (index - 4);
 656	unsigned long val;
 657	int err;
 658
 659	err = kstrtoul(buf, 10, &val);
 660	if (err)
 661		return err;
 662
 663	/* transform the sysfs interface values into table above */
 664	if ((val == 6) && (index < 4)) {
 665		val -= 3;
 666	} else if ((val == 3 && index < 4)
 667		|| (val == 4 && index >= 4)) {
 668		/* transform diode or thermistor into internal enable */
 669		val = !!val;
 670	} else {
 671		return -EINVAL;
 672	}
 673
 674	index = (index < 4) ? 0 : 1;
 675	mutex_lock(&data->update_lock);
 676	data->temp_mode[index] =
 677	    w83793_read_value(client, W83793_REG_TEMP_MODE[index]);
 678	data->temp_mode[index] &= ~(mask << shift);
 679	data->temp_mode[index] |= val << shift;
 680	w83793_write_value(client, W83793_REG_TEMP_MODE[index],
 681							data->temp_mode[index]);
 682	mutex_unlock(&data->update_lock);
 683
 684	return count;
 685}
 686
 687#define SETUP_PWM_DEFAULT		0
 688#define SETUP_PWM_UPTIME		1	/* Unit in 0.1s */
 689#define SETUP_PWM_DOWNTIME		2	/* Unit in 0.1s */
 690#define SETUP_TEMP_CRITICAL		3
 691static ssize_t
 692show_sf_setup(struct device *dev, struct device_attribute *attr, char *buf)
 693{
 694	struct sensor_device_attribute_2 *sensor_attr =
 695	    to_sensor_dev_attr_2(attr);
 696	int nr = sensor_attr->nr;
 697	struct w83793_data *data = w83793_update_device(dev);
 698	u32 val = 0;
 699
 700	if (nr == SETUP_PWM_DEFAULT)
 701		val = (data->pwm_default & 0x3f) << 2;
 702	else if (nr == SETUP_PWM_UPTIME)
 703		val = TIME_FROM_REG(data->pwm_uptime);
 704	else if (nr == SETUP_PWM_DOWNTIME)
 705		val = TIME_FROM_REG(data->pwm_downtime);
 706	else if (nr == SETUP_TEMP_CRITICAL)
 707		val = TEMP_FROM_REG(data->temp_critical & 0x7f);
 708
 709	return sprintf(buf, "%d\n", val);
 710}
 711
 712static ssize_t
 713store_sf_setup(struct device *dev, struct device_attribute *attr,
 714	       const char *buf, size_t count)
 715{
 716	struct sensor_device_attribute_2 *sensor_attr =
 717	    to_sensor_dev_attr_2(attr);
 718	int nr = sensor_attr->nr;
 719	struct i2c_client *client = to_i2c_client(dev);
 720	struct w83793_data *data = i2c_get_clientdata(client);
 721	long val;
 722	int err;
 723
 724	err = kstrtol(buf, 10, &val);
 725	if (err)
 726		return err;
 727
 728	mutex_lock(&data->update_lock);
 729	if (nr == SETUP_PWM_DEFAULT) {
 730		data->pwm_default =
 731		    w83793_read_value(client, W83793_REG_PWM_DEFAULT) & 0xc0;
 732		data->pwm_default |= clamp_val(val, 0, 0xff) >> 2;
 733		w83793_write_value(client, W83793_REG_PWM_DEFAULT,
 734							data->pwm_default);
 735	} else if (nr == SETUP_PWM_UPTIME) {
 736		data->pwm_uptime = TIME_TO_REG(val);
 737		data->pwm_uptime += data->pwm_uptime == 0 ? 1 : 0;
 738		w83793_write_value(client, W83793_REG_PWM_UPTIME,
 739							data->pwm_uptime);
 740	} else if (nr == SETUP_PWM_DOWNTIME) {
 741		data->pwm_downtime = TIME_TO_REG(val);
 742		data->pwm_downtime += data->pwm_downtime == 0 ? 1 : 0;
 743		w83793_write_value(client, W83793_REG_PWM_DOWNTIME,
 744							data->pwm_downtime);
 745	} else {		/* SETUP_TEMP_CRITICAL */
 746		data->temp_critical =
 747		    w83793_read_value(client, W83793_REG_TEMP_CRITICAL) & 0x80;
 748		data->temp_critical |= TEMP_TO_REG(val, 0, 0x7f);
 749		w83793_write_value(client, W83793_REG_TEMP_CRITICAL,
 750							data->temp_critical);
 751	}
 752
 753	mutex_unlock(&data->update_lock);
 754	return count;
 755}
 756
 757/*
 758 * Temp SmartFan control
 759 * TEMP_FAN_MAP
 760 * Temp channel control which pwm fan, bitfield, bit 0 indicate pwm1...
 761 * It's possible two or more temp channels control the same fan, w83793
 762 * always prefers to pick the most critical request and applies it to
 763 * the related Fan.
 764 * It's possible one fan is not in any mapping of 6 temp channels, this
 765 * means the fan is manual mode
 766 *
 767 * TEMP_PWM_ENABLE
 768 * Each temp channel has its own SmartFan mode, and temp channel
 769 * control fans that are set by TEMP_FAN_MAP
 770 * 0:	SmartFanII mode
 771 * 1:	Thermal Cruise Mode
 772 *
 773 * TEMP_CRUISE
 774 * Target temperature in thermal cruise mode, w83793 will try to turn
 775 * fan speed to keep the temperature of target device around this
 776 * temperature.
 777 *
 778 * TEMP_TOLERANCE
 779 * If Temp higher or lower than target with this tolerance, w83793
 780 * will take actions to speed up or slow down the fan to keep the
 781 * temperature within the tolerance range.
 782 */
 783
 784#define TEMP_FAN_MAP			0
 785#define TEMP_PWM_ENABLE			1
 786#define TEMP_CRUISE			2
 787#define TEMP_TOLERANCE			3
 788static ssize_t
 789show_sf_ctrl(struct device *dev, struct device_attribute *attr, char *buf)
 790{
 791	struct sensor_device_attribute_2 *sensor_attr =
 792	    to_sensor_dev_attr_2(attr);
 793	int nr = sensor_attr->nr;
 794	int index = sensor_attr->index;
 795	struct w83793_data *data = w83793_update_device(dev);
 796	u32 val;
 797
 798	if (nr == TEMP_FAN_MAP) {
 799		val = data->temp_fan_map[index];
 800	} else if (nr == TEMP_PWM_ENABLE) {
 801		/* +2 to transform into 2 and 3 to conform with sysfs intf */
 802		val = ((data->pwm_enable >> index) & 0x01) + 2;
 803	} else if (nr == TEMP_CRUISE) {
 804		val = TEMP_FROM_REG(data->temp_cruise[index] & 0x7f);
 805	} else {		/* TEMP_TOLERANCE */
 806		val = data->tolerance[index >> 1] >> ((index & 0x01) ? 4 : 0);
 807		val = TEMP_FROM_REG(val & 0x0f);
 808	}
 809	return sprintf(buf, "%d\n", val);
 810}
 811
 812static ssize_t
 813store_sf_ctrl(struct device *dev, struct device_attribute *attr,
 814	      const char *buf, size_t count)
 815{
 816	struct sensor_device_attribute_2 *sensor_attr =
 817	    to_sensor_dev_attr_2(attr);
 818	int nr = sensor_attr->nr;
 819	int index = sensor_attr->index;
 820	struct i2c_client *client = to_i2c_client(dev);
 821	struct w83793_data *data = i2c_get_clientdata(client);
 822	long val;
 823	int err;
 824
 825	err = kstrtol(buf, 10, &val);
 826	if (err)
 827		return err;
 828
 829	mutex_lock(&data->update_lock);
 830	if (nr == TEMP_FAN_MAP) {
 831		val = clamp_val(val, 0, 255);
 832		w83793_write_value(client, W83793_REG_TEMP_FAN_MAP(index), val);
 833		data->temp_fan_map[index] = val;
 834	} else if (nr == TEMP_PWM_ENABLE) {
 835		if (val == 2 || val == 3) {
 836			data->pwm_enable =
 837			    w83793_read_value(client, W83793_REG_PWM_ENABLE);
 838			if (val - 2)
 839				data->pwm_enable |= 1 << index;
 840			else
 841				data->pwm_enable &= ~(1 << index);
 842			w83793_write_value(client, W83793_REG_PWM_ENABLE,
 843							data->pwm_enable);
 844		} else {
 845			mutex_unlock(&data->update_lock);
 846			return -EINVAL;
 847		}
 848	} else if (nr == TEMP_CRUISE) {
 849		data->temp_cruise[index] =
 850		    w83793_read_value(client, W83793_REG_TEMP_CRUISE(index));
 851		data->temp_cruise[index] &= 0x80;
 852		data->temp_cruise[index] |= TEMP_TO_REG(val, 0, 0x7f);
 853
 854		w83793_write_value(client, W83793_REG_TEMP_CRUISE(index),
 855						data->temp_cruise[index]);
 856	} else {		/* TEMP_TOLERANCE */
 857		int i = index >> 1;
 858		u8 shift = (index & 0x01) ? 4 : 0;
 859		data->tolerance[i] =
 860		    w83793_read_value(client, W83793_REG_TEMP_TOL(i));
 861
 862		data->tolerance[i] &= ~(0x0f << shift);
 863		data->tolerance[i] |= TEMP_TO_REG(val, 0, 0x0f) << shift;
 864		w83793_write_value(client, W83793_REG_TEMP_TOL(i),
 865							data->tolerance[i]);
 866	}
 867
 868	mutex_unlock(&data->update_lock);
 869	return count;
 870}
 871
 872static ssize_t
 873show_sf2_pwm(struct device *dev, struct device_attribute *attr, char *buf)
 874{
 875	struct sensor_device_attribute_2 *sensor_attr =
 876	    to_sensor_dev_attr_2(attr);
 877	int nr = sensor_attr->nr;
 878	int index = sensor_attr->index;
 879	struct w83793_data *data = w83793_update_device(dev);
 880
 881	return sprintf(buf, "%d\n", (data->sf2_pwm[index][nr] & 0x3f) << 2);
 882}
 883
 884static ssize_t
 885store_sf2_pwm(struct device *dev, struct device_attribute *attr,
 886	      const char *buf, size_t count)
 887{
 888	struct i2c_client *client = to_i2c_client(dev);
 889	struct w83793_data *data = i2c_get_clientdata(client);
 890	struct sensor_device_attribute_2 *sensor_attr =
 891	    to_sensor_dev_attr_2(attr);
 892	int nr = sensor_attr->nr;
 893	int index = sensor_attr->index;
 894	unsigned long val;
 895	int err;
 896
 897	err = kstrtoul(buf, 10, &val);
 898	if (err)
 899		return err;
 900	val = clamp_val(val, 0, 0xff) >> 2;
 901
 902	mutex_lock(&data->update_lock);
 903	data->sf2_pwm[index][nr] =
 904	    w83793_read_value(client, W83793_REG_SF2_PWM(index, nr)) & 0xc0;
 905	data->sf2_pwm[index][nr] |= val;
 906	w83793_write_value(client, W83793_REG_SF2_PWM(index, nr),
 907						data->sf2_pwm[index][nr]);
 908	mutex_unlock(&data->update_lock);
 909	return count;
 910}
 911
 912static ssize_t
 913show_sf2_temp(struct device *dev, struct device_attribute *attr, char *buf)
 914{
 915	struct sensor_device_attribute_2 *sensor_attr =
 916	    to_sensor_dev_attr_2(attr);
 917	int nr = sensor_attr->nr;
 918	int index = sensor_attr->index;
 919	struct w83793_data *data = w83793_update_device(dev);
 920
 921	return sprintf(buf, "%ld\n",
 922		       TEMP_FROM_REG(data->sf2_temp[index][nr] & 0x7f));
 923}
 924
 925static ssize_t
 926store_sf2_temp(struct device *dev, struct device_attribute *attr,
 927	       const char *buf, size_t count)
 928{
 929	struct i2c_client *client = to_i2c_client(dev);
 930	struct w83793_data *data = i2c_get_clientdata(client);
 931	struct sensor_device_attribute_2 *sensor_attr =
 932	    to_sensor_dev_attr_2(attr);
 933	int nr = sensor_attr->nr;
 934	int index = sensor_attr->index;
 935	long val;
 936	int err;
 937
 938	err = kstrtol(buf, 10, &val);
 939	if (err)
 940		return err;
 941	val = TEMP_TO_REG(val, 0, 0x7f);
 942
 943	mutex_lock(&data->update_lock);
 944	data->sf2_temp[index][nr] =
 945	    w83793_read_value(client, W83793_REG_SF2_TEMP(index, nr)) & 0x80;
 946	data->sf2_temp[index][nr] |= val;
 947	w83793_write_value(client, W83793_REG_SF2_TEMP(index, nr),
 948					     data->sf2_temp[index][nr]);
 949	mutex_unlock(&data->update_lock);
 950	return count;
 951}
 952
 953/* only Vcore A/B and Vtt have additional 2 bits precision */
 954static ssize_t
 955show_in(struct device *dev, struct device_attribute *attr, char *buf)
 956{
 957	struct sensor_device_attribute_2 *sensor_attr =
 958	    to_sensor_dev_attr_2(attr);
 959	int nr = sensor_attr->nr;
 960	int index = sensor_attr->index;
 961	struct w83793_data *data = w83793_update_device(dev);
 962	u16 val = data->in[index][nr];
 963
 964	if (index < 3) {
 965		val <<= 2;
 966		val += (data->in_low_bits[nr] >> (index * 2)) & 0x3;
 967	}
 968	/* voltage inputs 5VDD and 5VSB needs 150mV offset */
 969	val = val * scale_in[index] + scale_in_add[index];
 970	return sprintf(buf, "%d\n", val);
 971}
 972
 973static ssize_t
 974store_in(struct device *dev, struct device_attribute *attr,
 975	 const char *buf, size_t count)
 976{
 977	struct sensor_device_attribute_2 *sensor_attr =
 978	    to_sensor_dev_attr_2(attr);
 979	int nr = sensor_attr->nr;
 980	int index = sensor_attr->index;
 981	struct i2c_client *client = to_i2c_client(dev);
 982	struct w83793_data *data = i2c_get_clientdata(client);
 983	unsigned long val;
 984	int err;
 985
 986	err = kstrtoul(buf, 10, &val);
 987	if (err)
 988		return err;
 989	val = (val + scale_in[index] / 2) / scale_in[index];
 990
 991	mutex_lock(&data->update_lock);
 992	if (index > 2) {
 993		/* fix the limit values of 5VDD and 5VSB to ALARM mechanism */
 994		if (nr == 1 || nr == 2)
 995			val -= scale_in_add[index] / scale_in[index];
 996		val = clamp_val(val, 0, 255);
 997	} else {
 998		val = clamp_val(val, 0, 0x3FF);
 999		data->in_low_bits[nr] =
1000		    w83793_read_value(client, W83793_REG_IN_LOW_BITS[nr]);
1001		data->in_low_bits[nr] &= ~(0x03 << (2 * index));
1002		data->in_low_bits[nr] |= (val & 0x03) << (2 * index);
1003		w83793_write_value(client, W83793_REG_IN_LOW_BITS[nr],
1004						     data->in_low_bits[nr]);
1005		val >>= 2;
1006	}
1007	data->in[index][nr] = val;
1008	w83793_write_value(client, W83793_REG_IN[index][nr],
1009							data->in[index][nr]);
1010	mutex_unlock(&data->update_lock);
1011	return count;
1012}
1013
1014#define NOT_USED			-1
1015
1016#define SENSOR_ATTR_IN(index)						\
1017	SENSOR_ATTR_2(in##index##_input, S_IRUGO, show_in, NULL,	\
1018		IN_READ, index),					\
1019	SENSOR_ATTR_2(in##index##_max, S_IRUGO | S_IWUSR, show_in,	\
1020		store_in, IN_MAX, index),				\
1021	SENSOR_ATTR_2(in##index##_min, S_IRUGO | S_IWUSR, show_in,	\
1022		store_in, IN_LOW, index),				\
1023	SENSOR_ATTR_2(in##index##_alarm, S_IRUGO, show_alarm_beep,	\
1024		NULL, ALARM_STATUS, index + ((index > 2) ? 1 : 0)),	\
1025	SENSOR_ATTR_2(in##index##_beep, S_IWUSR | S_IRUGO,		\
1026		show_alarm_beep, store_beep, BEEP_ENABLE,		\
1027		index + ((index > 2) ? 1 : 0))
1028
1029#define SENSOR_ATTR_FAN(index)						\
1030	SENSOR_ATTR_2(fan##index##_alarm, S_IRUGO, show_alarm_beep,	\
1031		NULL, ALARM_STATUS, index + 17),			\
1032	SENSOR_ATTR_2(fan##index##_beep, S_IWUSR | S_IRUGO,		\
1033		show_alarm_beep, store_beep, BEEP_ENABLE, index + 17),	\
1034	SENSOR_ATTR_2(fan##index##_input, S_IRUGO, show_fan,		\
1035		NULL, FAN_INPUT, index - 1),				\
1036	SENSOR_ATTR_2(fan##index##_min, S_IWUSR | S_IRUGO,		\
1037		show_fan, store_fan_min, FAN_MIN, index - 1)
1038
1039#define SENSOR_ATTR_PWM(index)						\
1040	SENSOR_ATTR_2(pwm##index, S_IWUSR | S_IRUGO, show_pwm,		\
1041		store_pwm, PWM_DUTY, index - 1),			\
1042	SENSOR_ATTR_2(pwm##index##_nonstop, S_IWUSR | S_IRUGO,		\
1043		show_pwm, store_pwm, PWM_NONSTOP, index - 1),		\
1044	SENSOR_ATTR_2(pwm##index##_start, S_IWUSR | S_IRUGO,		\
1045		show_pwm, store_pwm, PWM_START, index - 1),		\
1046	SENSOR_ATTR_2(pwm##index##_stop_time, S_IWUSR | S_IRUGO,	\
1047		show_pwm, store_pwm, PWM_STOP_TIME, index - 1)
1048
1049#define SENSOR_ATTR_TEMP(index)						\
1050	SENSOR_ATTR_2(temp##index##_type, S_IRUGO | S_IWUSR,		\
1051		show_temp_mode, store_temp_mode, NOT_USED, index - 1),	\
1052	SENSOR_ATTR_2(temp##index##_input, S_IRUGO, show_temp,		\
1053		NULL, TEMP_READ, index - 1),				\
1054	SENSOR_ATTR_2(temp##index##_max, S_IRUGO | S_IWUSR, show_temp,	\
1055		store_temp, TEMP_CRIT, index - 1),			\
1056	SENSOR_ATTR_2(temp##index##_max_hyst, S_IRUGO | S_IWUSR,	\
1057		show_temp, store_temp, TEMP_CRIT_HYST, index - 1),	\
1058	SENSOR_ATTR_2(temp##index##_warn, S_IRUGO | S_IWUSR, show_temp,	\
1059		store_temp, TEMP_WARN, index - 1),			\
1060	SENSOR_ATTR_2(temp##index##_warn_hyst, S_IRUGO | S_IWUSR,	\
1061		show_temp, store_temp, TEMP_WARN_HYST, index - 1),	\
1062	SENSOR_ATTR_2(temp##index##_alarm, S_IRUGO,			\
1063		show_alarm_beep, NULL, ALARM_STATUS, index + 11),	\
1064	SENSOR_ATTR_2(temp##index##_beep, S_IWUSR | S_IRUGO,		\
1065		show_alarm_beep, store_beep, BEEP_ENABLE, index + 11),	\
1066	SENSOR_ATTR_2(temp##index##_auto_channels_pwm,			\
1067		S_IRUGO | S_IWUSR, show_sf_ctrl, store_sf_ctrl,		\
1068		TEMP_FAN_MAP, index - 1),				\
1069	SENSOR_ATTR_2(temp##index##_pwm_enable, S_IWUSR | S_IRUGO,	\
1070		show_sf_ctrl, store_sf_ctrl, TEMP_PWM_ENABLE,		\
1071		index - 1),						\
1072	SENSOR_ATTR_2(thermal_cruise##index, S_IRUGO | S_IWUSR,		\
1073		show_sf_ctrl, store_sf_ctrl, TEMP_CRUISE, index - 1),	\
1074	SENSOR_ATTR_2(tolerance##index, S_IRUGO | S_IWUSR, show_sf_ctrl,\
1075		store_sf_ctrl, TEMP_TOLERANCE, index - 1),		\
1076	SENSOR_ATTR_2(temp##index##_auto_point1_pwm, S_IRUGO | S_IWUSR, \
1077		show_sf2_pwm, store_sf2_pwm, 0, index - 1),		\
1078	SENSOR_ATTR_2(temp##index##_auto_point2_pwm, S_IRUGO | S_IWUSR, \
1079		show_sf2_pwm, store_sf2_pwm, 1, index - 1),		\
1080	SENSOR_ATTR_2(temp##index##_auto_point3_pwm, S_IRUGO | S_IWUSR, \
1081		show_sf2_pwm, store_sf2_pwm, 2, index - 1),		\
1082	SENSOR_ATTR_2(temp##index##_auto_point4_pwm, S_IRUGO | S_IWUSR, \
1083		show_sf2_pwm, store_sf2_pwm, 3, index - 1),		\
1084	SENSOR_ATTR_2(temp##index##_auto_point5_pwm, S_IRUGO | S_IWUSR, \
1085		show_sf2_pwm, store_sf2_pwm, 4, index - 1),		\
1086	SENSOR_ATTR_2(temp##index##_auto_point6_pwm, S_IRUGO | S_IWUSR, \
1087		show_sf2_pwm, store_sf2_pwm, 5, index - 1),		\
1088	SENSOR_ATTR_2(temp##index##_auto_point7_pwm, S_IRUGO | S_IWUSR, \
1089		show_sf2_pwm, store_sf2_pwm, 6, index - 1),		\
1090	SENSOR_ATTR_2(temp##index##_auto_point1_temp, S_IRUGO | S_IWUSR,\
1091		show_sf2_temp, store_sf2_temp, 0, index - 1),		\
1092	SENSOR_ATTR_2(temp##index##_auto_point2_temp, S_IRUGO | S_IWUSR,\
1093		show_sf2_temp, store_sf2_temp, 1, index - 1),		\
1094	SENSOR_ATTR_2(temp##index##_auto_point3_temp, S_IRUGO | S_IWUSR,\
1095		show_sf2_temp, store_sf2_temp, 2, index - 1),		\
1096	SENSOR_ATTR_2(temp##index##_auto_point4_temp, S_IRUGO | S_IWUSR,\
1097		show_sf2_temp, store_sf2_temp, 3, index - 1),		\
1098	SENSOR_ATTR_2(temp##index##_auto_point5_temp, S_IRUGO | S_IWUSR,\
1099		show_sf2_temp, store_sf2_temp, 4, index - 1),		\
1100	SENSOR_ATTR_2(temp##index##_auto_point6_temp, S_IRUGO | S_IWUSR,\
1101		show_sf2_temp, store_sf2_temp, 5, index - 1),		\
1102	SENSOR_ATTR_2(temp##index##_auto_point7_temp, S_IRUGO | S_IWUSR,\
1103		show_sf2_temp, store_sf2_temp, 6, index - 1)
1104
1105static struct sensor_device_attribute_2 w83793_sensor_attr_2[] = {
1106	SENSOR_ATTR_IN(0),
1107	SENSOR_ATTR_IN(1),
1108	SENSOR_ATTR_IN(2),
1109	SENSOR_ATTR_IN(3),
1110	SENSOR_ATTR_IN(4),
1111	SENSOR_ATTR_IN(5),
1112	SENSOR_ATTR_IN(6),
1113	SENSOR_ATTR_IN(7),
1114	SENSOR_ATTR_IN(8),
1115	SENSOR_ATTR_IN(9),
1116	SENSOR_ATTR_FAN(1),
1117	SENSOR_ATTR_FAN(2),
1118	SENSOR_ATTR_FAN(3),
1119	SENSOR_ATTR_FAN(4),
1120	SENSOR_ATTR_FAN(5),
1121	SENSOR_ATTR_PWM(1),
1122	SENSOR_ATTR_PWM(2),
1123	SENSOR_ATTR_PWM(3),
1124};
1125
1126static struct sensor_device_attribute_2 w83793_temp[] = {
1127	SENSOR_ATTR_TEMP(1),
1128	SENSOR_ATTR_TEMP(2),
1129	SENSOR_ATTR_TEMP(3),
1130	SENSOR_ATTR_TEMP(4),
1131	SENSOR_ATTR_TEMP(5),
1132	SENSOR_ATTR_TEMP(6),
1133};
1134
1135/* Fan6-Fan12 */
1136static struct sensor_device_attribute_2 w83793_left_fan[] = {
1137	SENSOR_ATTR_FAN(6),
1138	SENSOR_ATTR_FAN(7),
1139	SENSOR_ATTR_FAN(8),
1140	SENSOR_ATTR_FAN(9),
1141	SENSOR_ATTR_FAN(10),
1142	SENSOR_ATTR_FAN(11),
1143	SENSOR_ATTR_FAN(12),
1144};
1145
1146/* Pwm4-Pwm8 */
1147static struct sensor_device_attribute_2 w83793_left_pwm[] = {
1148	SENSOR_ATTR_PWM(4),
1149	SENSOR_ATTR_PWM(5),
1150	SENSOR_ATTR_PWM(6),
1151	SENSOR_ATTR_PWM(7),
1152	SENSOR_ATTR_PWM(8),
1153};
1154
1155static struct sensor_device_attribute_2 w83793_vid[] = {
1156	SENSOR_ATTR_2(cpu0_vid, S_IRUGO, show_vid, NULL, NOT_USED, 0),
1157	SENSOR_ATTR_2(cpu1_vid, S_IRUGO, show_vid, NULL, NOT_USED, 1),
1158};
1159static DEVICE_ATTR_RW(vrm);
1160
1161static struct sensor_device_attribute_2 sda_single_files[] = {
1162	SENSOR_ATTR_2(intrusion0_alarm, S_IWUSR | S_IRUGO, show_alarm_beep,
1163		      store_chassis_clear, ALARM_STATUS, 30),
1164	SENSOR_ATTR_2(beep_enable, S_IWUSR | S_IRUGO, show_beep_enable,
1165		      store_beep_enable, NOT_USED, NOT_USED),
1166	SENSOR_ATTR_2(pwm_default, S_IWUSR | S_IRUGO, show_sf_setup,
1167		      store_sf_setup, SETUP_PWM_DEFAULT, NOT_USED),
1168	SENSOR_ATTR_2(pwm_uptime, S_IWUSR | S_IRUGO, show_sf_setup,
1169		      store_sf_setup, SETUP_PWM_UPTIME, NOT_USED),
1170	SENSOR_ATTR_2(pwm_downtime, S_IWUSR | S_IRUGO, show_sf_setup,
1171		      store_sf_setup, SETUP_PWM_DOWNTIME, NOT_USED),
1172	SENSOR_ATTR_2(temp_critical, S_IWUSR | S_IRUGO, show_sf_setup,
1173		      store_sf_setup, SETUP_TEMP_CRITICAL, NOT_USED),
1174};
1175
1176static void w83793_init_client(struct i2c_client *client)
1177{
1178	if (reset)
1179		w83793_write_value(client, W83793_REG_CONFIG, 0x80);
1180
1181	/* Start monitoring */
1182	w83793_write_value(client, W83793_REG_CONFIG,
1183			   w83793_read_value(client, W83793_REG_CONFIG) | 0x01);
1184}
1185
1186/*
1187 * Watchdog routines
1188 */
1189
1190static int watchdog_set_timeout(struct w83793_data *data, int timeout)
1191{
1192	unsigned int mtimeout;
1193	int ret;
1194
1195	mtimeout = DIV_ROUND_UP(timeout, 60);
1196
1197	if (mtimeout > 255)
1198		return -EINVAL;
1199
1200	mutex_lock(&data->watchdog_lock);
1201	if (!data->client) {
1202		ret = -ENODEV;
1203		goto leave;
1204	}
1205
1206	data->watchdog_timeout = mtimeout;
1207
1208	/* Set Timeout value (in Minutes) */
1209	w83793_write_value(data->client, W83793_REG_WDT_TIMEOUT,
1210			   data->watchdog_timeout);
1211
1212	ret = mtimeout * 60;
1213
1214leave:
1215	mutex_unlock(&data->watchdog_lock);
1216	return ret;
1217}
1218
1219static int watchdog_get_timeout(struct w83793_data *data)
1220{
1221	int timeout;
1222
1223	mutex_lock(&data->watchdog_lock);
1224	timeout = data->watchdog_timeout * 60;
1225	mutex_unlock(&data->watchdog_lock);
1226
1227	return timeout;
1228}
1229
1230static int watchdog_trigger(struct w83793_data *data)
1231{
1232	int ret = 0;
1233
1234	mutex_lock(&data->watchdog_lock);
1235	if (!data->client) {
1236		ret = -ENODEV;
1237		goto leave;
1238	}
1239
1240	/* Set Timeout value (in Minutes) */
1241	w83793_write_value(data->client, W83793_REG_WDT_TIMEOUT,
1242			   data->watchdog_timeout);
1243
1244leave:
1245	mutex_unlock(&data->watchdog_lock);
1246	return ret;
1247}
1248
1249static int watchdog_enable(struct w83793_data *data)
1250{
1251	int ret = 0;
1252
1253	mutex_lock(&data->watchdog_lock);
1254	if (!data->client) {
1255		ret = -ENODEV;
1256		goto leave;
1257	}
1258
1259	/* Set initial timeout */
1260	w83793_write_value(data->client, W83793_REG_WDT_TIMEOUT,
1261			   data->watchdog_timeout);
1262
1263	/* Enable Soft Watchdog */
1264	w83793_write_value(data->client, W83793_REG_WDT_LOCK, 0x55);
1265
1266leave:
1267	mutex_unlock(&data->watchdog_lock);
1268	return ret;
1269}
1270
1271static int watchdog_disable(struct w83793_data *data)
1272{
1273	int ret = 0;
1274
1275	mutex_lock(&data->watchdog_lock);
1276	if (!data->client) {
1277		ret = -ENODEV;
1278		goto leave;
1279	}
1280
1281	/* Disable Soft Watchdog */
1282	w83793_write_value(data->client, W83793_REG_WDT_LOCK, 0xAA);
1283
1284leave:
1285	mutex_unlock(&data->watchdog_lock);
1286	return ret;
1287}
1288
1289static int watchdog_open(struct inode *inode, struct file *filp)
1290{
1291	struct w83793_data *pos, *data = NULL;
1292	int watchdog_is_open;
1293
1294	/*
1295	 * We get called from drivers/char/misc.c with misc_mtx hold, and we
1296	 * call misc_register() from  w83793_probe() with watchdog_data_mutex
1297	 * hold, as misc_register() takes the misc_mtx lock, this is a possible
1298	 * deadlock, so we use mutex_trylock here.
1299	 */
1300	if (!mutex_trylock(&watchdog_data_mutex))
1301		return -ERESTARTSYS;
1302	list_for_each_entry(pos, &watchdog_data_list, list) {
1303		if (pos->watchdog_miscdev.minor == iminor(inode)) {
1304			data = pos;
1305			break;
1306		}
1307	}
1308
1309	/* Check, if device is already open */
1310	watchdog_is_open = test_and_set_bit(0, &data->watchdog_is_open);
1311
1312	/*
1313	 * Increase data reference counter (if not already done).
1314	 * Note we can never not have found data, so we don't check for this
1315	 */
1316	if (!watchdog_is_open)
1317		kref_get(&data->kref);
1318
1319	mutex_unlock(&watchdog_data_mutex);
1320
1321	/* Check, if device is already open and possibly issue error */
1322	if (watchdog_is_open)
1323		return -EBUSY;
1324
1325	/* Enable Soft Watchdog */
1326	watchdog_enable(data);
1327
1328	/* Store pointer to data into filp's private data */
1329	filp->private_data = data;
1330
1331	return stream_open(inode, filp);
1332}
1333
1334static int watchdog_close(struct inode *inode, struct file *filp)
1335{
1336	struct w83793_data *data = filp->private_data;
1337
1338	if (data->watchdog_expect_close) {
1339		watchdog_disable(data);
1340		data->watchdog_expect_close = 0;
1341	} else {
1342		watchdog_trigger(data);
1343		dev_crit(&data->client->dev,
1344			"unexpected close, not stopping watchdog!\n");
1345	}
1346
1347	clear_bit(0, &data->watchdog_is_open);
1348
1349	/* Decrease data reference counter */
1350	mutex_lock(&watchdog_data_mutex);
1351	kref_put(&data->kref, w83793_release_resources);
1352	mutex_unlock(&watchdog_data_mutex);
1353
1354	return 0;
1355}
1356
1357static ssize_t watchdog_write(struct file *filp, const char __user *buf,
1358	size_t count, loff_t *offset)
1359{
1360	ssize_t ret;
1361	struct w83793_data *data = filp->private_data;
1362
1363	if (count) {
1364		if (!nowayout) {
1365			size_t i;
1366
1367			/* Clear it in case it was set with a previous write */
1368			data->watchdog_expect_close = 0;
1369
1370			for (i = 0; i != count; i++) {
1371				char c;
1372				if (get_user(c, buf + i))
1373					return -EFAULT;
1374				if (c == 'V')
1375					data->watchdog_expect_close = 1;
1376			}
1377		}
1378		ret = watchdog_trigger(data);
1379		if (ret < 0)
1380			return ret;
1381	}
1382	return count;
1383}
1384
1385static long watchdog_ioctl(struct file *filp, unsigned int cmd,
1386			   unsigned long arg)
1387{
1388	struct watchdog_info ident = {
1389		.options = WDIOF_KEEPALIVEPING |
1390			   WDIOF_SETTIMEOUT |
1391			   WDIOF_CARDRESET,
1392		.identity = "w83793 watchdog"
1393	};
1394
1395	int val, ret = 0;
1396	struct w83793_data *data = filp->private_data;
1397
1398	switch (cmd) {
1399	case WDIOC_GETSUPPORT:
1400		if (!nowayout)
1401			ident.options |= WDIOF_MAGICCLOSE;
1402		if (copy_to_user((void __user *)arg, &ident, sizeof(ident)))
1403			ret = -EFAULT;
1404		break;
1405
1406	case WDIOC_GETSTATUS:
1407		val = data->watchdog_caused_reboot ? WDIOF_CARDRESET : 0;
1408		ret = put_user(val, (int __user *)arg);
1409		break;
1410
1411	case WDIOC_GETBOOTSTATUS:
1412		ret = put_user(0, (int __user *)arg);
1413		break;
1414
1415	case WDIOC_KEEPALIVE:
1416		ret = watchdog_trigger(data);
1417		break;
1418
1419	case WDIOC_GETTIMEOUT:
1420		val = watchdog_get_timeout(data);
1421		ret = put_user(val, (int __user *)arg);
1422		break;
1423
1424	case WDIOC_SETTIMEOUT:
1425		if (get_user(val, (int __user *)arg)) {
1426			ret = -EFAULT;
1427			break;
1428		}
1429		ret = watchdog_set_timeout(data, val);
1430		if (ret > 0)
1431			ret = put_user(ret, (int __user *)arg);
1432		break;
1433
1434	case WDIOC_SETOPTIONS:
1435		if (get_user(val, (int __user *)arg)) {
1436			ret = -EFAULT;
1437			break;
1438		}
1439
1440		if (val & WDIOS_DISABLECARD)
1441			ret = watchdog_disable(data);
1442		else if (val & WDIOS_ENABLECARD)
1443			ret = watchdog_enable(data);
1444		else
1445			ret = -EINVAL;
1446
1447		break;
1448	default:
1449		ret = -ENOTTY;
1450	}
1451	return ret;
1452}
1453
1454static const struct file_operations watchdog_fops = {
1455	.owner = THIS_MODULE,
1456	.llseek = no_llseek,
1457	.open = watchdog_open,
1458	.release = watchdog_close,
1459	.write = watchdog_write,
1460	.unlocked_ioctl = watchdog_ioctl,
1461	.compat_ioctl = compat_ptr_ioctl,
1462};
1463
1464/*
1465 *	Notifier for system down
1466 */
1467
1468static int watchdog_notify_sys(struct notifier_block *this, unsigned long code,
1469			       void *unused)
1470{
1471	struct w83793_data *data = NULL;
1472
1473	if (code == SYS_DOWN || code == SYS_HALT) {
1474
1475		/* Disable each registered watchdog */
1476		mutex_lock(&watchdog_data_mutex);
1477		list_for_each_entry(data, &watchdog_data_list, list) {
1478			if (data->watchdog_miscdev.minor)
1479				watchdog_disable(data);
1480		}
1481		mutex_unlock(&watchdog_data_mutex);
1482	}
1483
1484	return NOTIFY_DONE;
1485}
1486
1487/*
1488 *	The WDT needs to learn about soft shutdowns in order to
1489 *	turn the timebomb registers off.
1490 */
1491
1492static struct notifier_block watchdog_notifier = {
1493	.notifier_call = watchdog_notify_sys,
1494};
1495
1496/*
1497 * Init / remove routines
1498 */
1499
1500static int w83793_remove(struct i2c_client *client)
1501{
1502	struct w83793_data *data = i2c_get_clientdata(client);
1503	struct device *dev = &client->dev;
1504	int i, tmp;
1505
1506	/* Unregister the watchdog (if registered) */
1507	if (data->watchdog_miscdev.minor) {
1508		misc_deregister(&data->watchdog_miscdev);
1509
1510		if (data->watchdog_is_open) {
1511			dev_warn(&client->dev,
1512				"i2c client detached with watchdog open! "
1513				"Stopping watchdog.\n");
1514			watchdog_disable(data);
1515		}
1516
1517		mutex_lock(&watchdog_data_mutex);
1518		list_del(&data->list);
1519		mutex_unlock(&watchdog_data_mutex);
1520
1521		/* Tell the watchdog code the client is gone */
1522		mutex_lock(&data->watchdog_lock);
1523		data->client = NULL;
1524		mutex_unlock(&data->watchdog_lock);
1525	}
1526
1527	/* Reset Configuration Register to Disable Watch Dog Registers */
1528	tmp = w83793_read_value(client, W83793_REG_CONFIG);
1529	w83793_write_value(client, W83793_REG_CONFIG, tmp & ~0x04);
1530
1531	unregister_reboot_notifier(&watchdog_notifier);
1532
1533	hwmon_device_unregister(data->hwmon_dev);
1534
1535	for (i = 0; i < ARRAY_SIZE(w83793_sensor_attr_2); i++)
1536		device_remove_file(dev,
1537				   &w83793_sensor_attr_2[i].dev_attr);
1538
1539	for (i = 0; i < ARRAY_SIZE(sda_single_files); i++)
1540		device_remove_file(dev, &sda_single_files[i].dev_attr);
1541
1542	for (i = 0; i < ARRAY_SIZE(w83793_vid); i++)
1543		device_remove_file(dev, &w83793_vid[i].dev_attr);
1544	device_remove_file(dev, &dev_attr_vrm);
1545
1546	for (i = 0; i < ARRAY_SIZE(w83793_left_fan); i++)
1547		device_remove_file(dev, &w83793_left_fan[i].dev_attr);
1548
1549	for (i = 0; i < ARRAY_SIZE(w83793_left_pwm); i++)
1550		device_remove_file(dev, &w83793_left_pwm[i].dev_attr);
1551
1552	for (i = 0; i < ARRAY_SIZE(w83793_temp); i++)
1553		device_remove_file(dev, &w83793_temp[i].dev_attr);
1554
1555	/* Decrease data reference counter */
1556	mutex_lock(&watchdog_data_mutex);
1557	kref_put(&data->kref, w83793_release_resources);
1558	mutex_unlock(&watchdog_data_mutex);
1559
1560	return 0;
1561}
1562
1563static int
1564w83793_detect_subclients(struct i2c_client *client)
1565{
1566	int i, id;
1567	int address = client->addr;
1568	u8 tmp;
1569	struct i2c_adapter *adapter = client->adapter;
1570	struct w83793_data *data = i2c_get_clientdata(client);
1571
1572	id = i2c_adapter_id(adapter);
1573	if (force_subclients[0] == id && force_subclients[1] == address) {
1574		for (i = 2; i <= 3; i++) {
1575			if (force_subclients[i] < 0x48
1576			    || force_subclients[i] > 0x4f) {
1577				dev_err(&client->dev,
1578					"invalid subclient "
1579					"address %d; must be 0x48-0x4f\n",
1580					force_subclients[i]);
1581				return -EINVAL;
1582			}
1583		}
1584		w83793_write_value(client, W83793_REG_I2C_SUBADDR,
1585				   (force_subclients[2] & 0x07) |
1586				   ((force_subclients[3] & 0x07) << 4));
1587	}
1588
1589	tmp = w83793_read_value(client, W83793_REG_I2C_SUBADDR);
1590	if (!(tmp & 0x08))
1591		data->lm75[0] = devm_i2c_new_dummy_device(&client->dev, adapter,
1592							  0x48 + (tmp & 0x7));
1593	if (!(tmp & 0x80)) {
1594		if (!IS_ERR(data->lm75[0])
1595		    && ((tmp & 0x7) == ((tmp >> 4) & 0x7))) {
1596			dev_err(&client->dev,
1597				"duplicate addresses 0x%x, "
1598				"use force_subclients\n", data->lm75[0]->addr);
1599			return -ENODEV;
1600		}
1601		data->lm75[1] = devm_i2c_new_dummy_device(&client->dev, adapter,
1602							  0x48 + ((tmp >> 4) & 0x7));
1603	}
1604
 
 
 
 
 
 
1605	return 0;
1606}
1607
1608/* Return 0 if detection is successful, -ENODEV otherwise */
1609static int w83793_detect(struct i2c_client *client,
1610			 struct i2c_board_info *info)
1611{
1612	u8 tmp, bank, chip_id;
1613	struct i2c_adapter *adapter = client->adapter;
1614	unsigned short address = client->addr;
1615
1616	if (!i2c_check_functionality(adapter, I2C_FUNC_SMBUS_BYTE_DATA))
1617		return -ENODEV;
1618
1619	bank = i2c_smbus_read_byte_data(client, W83793_REG_BANKSEL);
1620
1621	tmp = bank & 0x80 ? 0x5c : 0xa3;
1622	/* Check Winbond vendor ID */
1623	if (tmp != i2c_smbus_read_byte_data(client, W83793_REG_VENDORID)) {
1624		pr_debug("w83793: Detection failed at check vendor id\n");
1625		return -ENODEV;
1626	}
1627
1628	/*
1629	 * If Winbond chip, address of chip and W83793_REG_I2C_ADDR
1630	 * should match
1631	 */
1632	if ((bank & 0x07) == 0
1633	 && i2c_smbus_read_byte_data(client, W83793_REG_I2C_ADDR) !=
1634	    (address << 1)) {
1635		pr_debug("w83793: Detection failed at check i2c addr\n");
1636		return -ENODEV;
1637	}
1638
1639	/* Determine the chip type now */
1640	chip_id = i2c_smbus_read_byte_data(client, W83793_REG_CHIPID);
1641	if (chip_id != 0x7b)
1642		return -ENODEV;
1643
1644	strlcpy(info->type, "w83793", I2C_NAME_SIZE);
1645
1646	return 0;
1647}
1648
1649static int w83793_probe(struct i2c_client *client,
1650			const struct i2c_device_id *id)
1651{
1652	struct device *dev = &client->dev;
1653	static const int watchdog_minors[] = {
1654		WATCHDOG_MINOR, 212, 213, 214, 215
1655	};
1656	struct w83793_data *data;
1657	int i, tmp, val, err;
1658	int files_fan = ARRAY_SIZE(w83793_left_fan) / 7;
1659	int files_pwm = ARRAY_SIZE(w83793_left_pwm) / 5;
1660	int files_temp = ARRAY_SIZE(w83793_temp) / 6;
1661
1662	data = kzalloc(sizeof(struct w83793_data), GFP_KERNEL);
1663	if (!data) {
1664		err = -ENOMEM;
1665		goto exit;
1666	}
1667
1668	i2c_set_clientdata(client, data);
1669	data->bank = i2c_smbus_read_byte_data(client, W83793_REG_BANKSEL);
1670	mutex_init(&data->update_lock);
1671	mutex_init(&data->watchdog_lock);
1672	INIT_LIST_HEAD(&data->list);
1673	kref_init(&data->kref);
1674
1675	/*
1676	 * Store client pointer in our data struct for watchdog usage
1677	 * (where the client is found through a data ptr instead of the
1678	 * otherway around)
1679	 */
1680	data->client = client;
1681
1682	err = w83793_detect_subclients(client);
1683	if (err)
1684		goto free_mem;
1685
1686	/* Initialize the chip */
1687	w83793_init_client(client);
1688
1689	/*
1690	 * Only fan 1-5 has their own input pins,
1691	 * Pwm 1-3 has their own pins
1692	 */
1693	data->has_fan = 0x1f;
1694	data->has_pwm = 0x07;
1695	tmp = w83793_read_value(client, W83793_REG_MFC);
1696	val = w83793_read_value(client, W83793_REG_FANIN_CTRL);
1697
1698	/* check the function of pins 49-56 */
1699	if (tmp & 0x80) {
1700		data->has_vid |= 0x2;	/* has VIDB */
1701	} else {
1702		data->has_pwm |= 0x18;	/* pwm 4,5 */
1703		if (val & 0x01) {	/* fan 6 */
1704			data->has_fan |= 0x20;
1705			data->has_pwm |= 0x20;
1706		}
1707		if (val & 0x02) {	/* fan 7 */
1708			data->has_fan |= 0x40;
1709			data->has_pwm |= 0x40;
1710		}
1711		if (!(tmp & 0x40) && (val & 0x04)) {	/* fan 8 */
1712			data->has_fan |= 0x80;
1713			data->has_pwm |= 0x80;
1714		}
1715	}
1716
1717	/* check the function of pins 37-40 */
1718	if (!(tmp & 0x29))
1719		data->has_vid |= 0x1;	/* has VIDA */
1720	if (0x08 == (tmp & 0x0c)) {
1721		if (val & 0x08)	/* fan 9 */
1722			data->has_fan |= 0x100;
1723		if (val & 0x10)	/* fan 10 */
1724			data->has_fan |= 0x200;
1725	}
1726	if (0x20 == (tmp & 0x30)) {
1727		if (val & 0x20)	/* fan 11 */
1728			data->has_fan |= 0x400;
1729		if (val & 0x40)	/* fan 12 */
1730			data->has_fan |= 0x800;
1731	}
1732
1733	if ((tmp & 0x01) && (val & 0x04)) {	/* fan 8, second location */
1734		data->has_fan |= 0x80;
1735		data->has_pwm |= 0x80;
1736	}
1737
1738	tmp = w83793_read_value(client, W83793_REG_FANIN_SEL);
1739	if ((tmp & 0x01) && (val & 0x08)) {	/* fan 9, second location */
1740		data->has_fan |= 0x100;
1741	}
1742	if ((tmp & 0x02) && (val & 0x10)) {	/* fan 10, second location */
1743		data->has_fan |= 0x200;
1744	}
1745	if ((tmp & 0x04) && (val & 0x20)) {	/* fan 11, second location */
1746		data->has_fan |= 0x400;
1747	}
1748	if ((tmp & 0x08) && (val & 0x40)) {	/* fan 12, second location */
1749		data->has_fan |= 0x800;
1750	}
1751
1752	/* check the temp1-6 mode, ignore former AMDSI selected inputs */
1753	tmp = w83793_read_value(client, W83793_REG_TEMP_MODE[0]);
1754	if (tmp & 0x01)
1755		data->has_temp |= 0x01;
1756	if (tmp & 0x04)
1757		data->has_temp |= 0x02;
1758	if (tmp & 0x10)
1759		data->has_temp |= 0x04;
1760	if (tmp & 0x40)
1761		data->has_temp |= 0x08;
1762
1763	tmp = w83793_read_value(client, W83793_REG_TEMP_MODE[1]);
1764	if (tmp & 0x01)
1765		data->has_temp |= 0x10;
1766	if (tmp & 0x02)
1767		data->has_temp |= 0x20;
1768
1769	/* Register sysfs hooks */
1770	for (i = 0; i < ARRAY_SIZE(w83793_sensor_attr_2); i++) {
1771		err = device_create_file(dev,
1772					 &w83793_sensor_attr_2[i].dev_attr);
1773		if (err)
1774			goto exit_remove;
1775	}
1776
1777	for (i = 0; i < ARRAY_SIZE(w83793_vid); i++) {
1778		if (!(data->has_vid & (1 << i)))
1779			continue;
1780		err = device_create_file(dev, &w83793_vid[i].dev_attr);
1781		if (err)
1782			goto exit_remove;
1783	}
1784	if (data->has_vid) {
1785		data->vrm = vid_which_vrm();
1786		err = device_create_file(dev, &dev_attr_vrm);
1787		if (err)
1788			goto exit_remove;
1789	}
1790
1791	for (i = 0; i < ARRAY_SIZE(sda_single_files); i++) {
1792		err = device_create_file(dev, &sda_single_files[i].dev_attr);
1793		if (err)
1794			goto exit_remove;
1795
1796	}
1797
1798	for (i = 0; i < 6; i++) {
1799		int j;
1800		if (!(data->has_temp & (1 << i)))
1801			continue;
1802		for (j = 0; j < files_temp; j++) {
1803			err = device_create_file(dev,
1804						&w83793_temp[(i) * files_temp
1805								+ j].dev_attr);
1806			if (err)
1807				goto exit_remove;
1808		}
1809	}
1810
1811	for (i = 5; i < 12; i++) {
1812		int j;
1813		if (!(data->has_fan & (1 << i)))
1814			continue;
1815		for (j = 0; j < files_fan; j++) {
1816			err = device_create_file(dev,
1817					   &w83793_left_fan[(i - 5) * files_fan
1818								+ j].dev_attr);
1819			if (err)
1820				goto exit_remove;
1821		}
1822	}
1823
1824	for (i = 3; i < 8; i++) {
1825		int j;
1826		if (!(data->has_pwm & (1 << i)))
1827			continue;
1828		for (j = 0; j < files_pwm; j++) {
1829			err = device_create_file(dev,
1830					   &w83793_left_pwm[(i - 3) * files_pwm
1831								+ j].dev_attr);
1832			if (err)
1833				goto exit_remove;
1834		}
1835	}
1836
1837	data->hwmon_dev = hwmon_device_register(dev);
1838	if (IS_ERR(data->hwmon_dev)) {
1839		err = PTR_ERR(data->hwmon_dev);
1840		goto exit_remove;
1841	}
1842
1843	/* Watchdog initialization */
1844
1845	/* Register boot notifier */
1846	err = register_reboot_notifier(&watchdog_notifier);
1847	if (err != 0) {
1848		dev_err(&client->dev,
1849			"cannot register reboot notifier (err=%d)\n", err);
1850		goto exit_devunreg;
1851	}
1852
1853	/*
1854	 * Enable Watchdog registers.
1855	 * Set Configuration Register to Enable Watch Dog Registers
1856	 * (Bit 2) = XXXX, X1XX.
1857	 */
1858	tmp = w83793_read_value(client, W83793_REG_CONFIG);
1859	w83793_write_value(client, W83793_REG_CONFIG, tmp | 0x04);
1860
1861	/* Set the default watchdog timeout */
1862	data->watchdog_timeout = timeout;
1863
1864	/* Check, if last reboot was caused by watchdog */
1865	data->watchdog_caused_reboot =
1866	  w83793_read_value(data->client, W83793_REG_WDT_STATUS) & 0x01;
1867
1868	/* Disable Soft Watchdog during initialiation */
1869	watchdog_disable(data);
1870
1871	/*
1872	 * We take the data_mutex lock early so that watchdog_open() cannot
1873	 * run when misc_register() has completed, but we've not yet added
1874	 * our data to the watchdog_data_list (and set the default timeout)
1875	 */
1876	mutex_lock(&watchdog_data_mutex);
1877	for (i = 0; i < ARRAY_SIZE(watchdog_minors); i++) {
1878		/* Register our watchdog part */
1879		snprintf(data->watchdog_name, sizeof(data->watchdog_name),
1880			"watchdog%c", (i == 0) ? '\0' : ('0' + i));
1881		data->watchdog_miscdev.name = data->watchdog_name;
1882		data->watchdog_miscdev.fops = &watchdog_fops;
1883		data->watchdog_miscdev.minor = watchdog_minors[i];
1884
1885		err = misc_register(&data->watchdog_miscdev);
1886		if (err == -EBUSY)
1887			continue;
1888		if (err) {
1889			data->watchdog_miscdev.minor = 0;
1890			dev_err(&client->dev,
1891				"Registering watchdog chardev: %d\n", err);
1892			break;
1893		}
1894
1895		list_add(&data->list, &watchdog_data_list);
1896
1897		dev_info(&client->dev,
1898			"Registered watchdog chardev major 10, minor: %d\n",
1899			watchdog_minors[i]);
1900		break;
1901	}
1902	if (i == ARRAY_SIZE(watchdog_minors)) {
1903		data->watchdog_miscdev.minor = 0;
1904		dev_warn(&client->dev,
1905			 "Couldn't register watchdog chardev (due to no free minor)\n");
1906	}
1907
1908	mutex_unlock(&watchdog_data_mutex);
1909
1910	return 0;
1911
1912	/* Unregister hwmon device */
1913
1914exit_devunreg:
1915
1916	hwmon_device_unregister(data->hwmon_dev);
1917
1918	/* Unregister sysfs hooks */
1919
1920exit_remove:
1921	for (i = 0; i < ARRAY_SIZE(w83793_sensor_attr_2); i++)
1922		device_remove_file(dev, &w83793_sensor_attr_2[i].dev_attr);
1923
1924	for (i = 0; i < ARRAY_SIZE(sda_single_files); i++)
1925		device_remove_file(dev, &sda_single_files[i].dev_attr);
1926
1927	for (i = 0; i < ARRAY_SIZE(w83793_vid); i++)
1928		device_remove_file(dev, &w83793_vid[i].dev_attr);
1929
1930	for (i = 0; i < ARRAY_SIZE(w83793_left_fan); i++)
1931		device_remove_file(dev, &w83793_left_fan[i].dev_attr);
1932
1933	for (i = 0; i < ARRAY_SIZE(w83793_left_pwm); i++)
1934		device_remove_file(dev, &w83793_left_pwm[i].dev_attr);
1935
1936	for (i = 0; i < ARRAY_SIZE(w83793_temp); i++)
1937		device_remove_file(dev, &w83793_temp[i].dev_attr);
1938free_mem:
1939	kfree(data);
1940exit:
1941	return err;
1942}
1943
1944static void w83793_update_nonvolatile(struct device *dev)
1945{
1946	struct i2c_client *client = to_i2c_client(dev);
1947	struct w83793_data *data = i2c_get_clientdata(client);
1948	int i, j;
1949	/*
1950	 * They are somewhat "stable" registers, and to update them every time
1951	 * takes so much time, it's just not worthy. Update them in a long
1952	 * interval to avoid exception.
1953	 */
1954	if (!(time_after(jiffies, data->last_nonvolatile + HZ * 300)
1955	      || !data->valid))
1956		return;
1957	/* update voltage limits */
1958	for (i = 1; i < 3; i++) {
1959		for (j = 0; j < ARRAY_SIZE(data->in); j++) {
1960			data->in[j][i] =
1961			    w83793_read_value(client, W83793_REG_IN[j][i]);
1962		}
1963		data->in_low_bits[i] =
1964		    w83793_read_value(client, W83793_REG_IN_LOW_BITS[i]);
1965	}
1966
1967	for (i = 0; i < ARRAY_SIZE(data->fan_min); i++) {
1968		/* Update the Fan measured value and limits */
1969		if (!(data->has_fan & (1 << i)))
1970			continue;
1971		data->fan_min[i] =
1972		    w83793_read_value(client, W83793_REG_FAN_MIN(i)) << 8;
1973		data->fan_min[i] |=
1974		    w83793_read_value(client, W83793_REG_FAN_MIN(i) + 1);
1975	}
1976
1977	for (i = 0; i < ARRAY_SIZE(data->temp_fan_map); i++) {
1978		if (!(data->has_temp & (1 << i)))
1979			continue;
1980		data->temp_fan_map[i] =
1981		    w83793_read_value(client, W83793_REG_TEMP_FAN_MAP(i));
1982		for (j = 1; j < 5; j++) {
1983			data->temp[i][j] =
1984			    w83793_read_value(client, W83793_REG_TEMP[i][j]);
1985		}
1986		data->temp_cruise[i] =
1987		    w83793_read_value(client, W83793_REG_TEMP_CRUISE(i));
1988		for (j = 0; j < 7; j++) {
1989			data->sf2_pwm[i][j] =
1990			    w83793_read_value(client, W83793_REG_SF2_PWM(i, j));
1991			data->sf2_temp[i][j] =
1992			    w83793_read_value(client,
1993					      W83793_REG_SF2_TEMP(i, j));
1994		}
1995	}
1996
1997	for (i = 0; i < ARRAY_SIZE(data->temp_mode); i++)
1998		data->temp_mode[i] =
1999		    w83793_read_value(client, W83793_REG_TEMP_MODE[i]);
2000
2001	for (i = 0; i < ARRAY_SIZE(data->tolerance); i++) {
2002		data->tolerance[i] =
2003		    w83793_read_value(client, W83793_REG_TEMP_TOL(i));
2004	}
2005
2006	for (i = 0; i < ARRAY_SIZE(data->pwm); i++) {
2007		if (!(data->has_pwm & (1 << i)))
2008			continue;
2009		data->pwm[i][PWM_NONSTOP] =
2010		    w83793_read_value(client, W83793_REG_PWM(i, PWM_NONSTOP));
2011		data->pwm[i][PWM_START] =
2012		    w83793_read_value(client, W83793_REG_PWM(i, PWM_START));
2013		data->pwm_stop_time[i] =
2014		    w83793_read_value(client, W83793_REG_PWM_STOP_TIME(i));
2015	}
2016
2017	data->pwm_default = w83793_read_value(client, W83793_REG_PWM_DEFAULT);
2018	data->pwm_enable = w83793_read_value(client, W83793_REG_PWM_ENABLE);
2019	data->pwm_uptime = w83793_read_value(client, W83793_REG_PWM_UPTIME);
2020	data->pwm_downtime = w83793_read_value(client, W83793_REG_PWM_DOWNTIME);
2021	data->temp_critical =
2022	    w83793_read_value(client, W83793_REG_TEMP_CRITICAL);
2023	data->beep_enable = w83793_read_value(client, W83793_REG_OVT_BEEP);
2024
2025	for (i = 0; i < ARRAY_SIZE(data->beeps); i++)
2026		data->beeps[i] = w83793_read_value(client, W83793_REG_BEEP(i));
2027
2028	data->last_nonvolatile = jiffies;
2029}
2030
2031static struct w83793_data *w83793_update_device(struct device *dev)
2032{
2033	struct i2c_client *client = to_i2c_client(dev);
2034	struct w83793_data *data = i2c_get_clientdata(client);
2035	int i;
2036
2037	mutex_lock(&data->update_lock);
2038
2039	if (!(time_after(jiffies, data->last_updated + HZ * 2)
2040	      || !data->valid))
2041		goto END;
2042
2043	/* Update the voltages measured value and limits */
2044	for (i = 0; i < ARRAY_SIZE(data->in); i++)
2045		data->in[i][IN_READ] =
2046		    w83793_read_value(client, W83793_REG_IN[i][IN_READ]);
2047
2048	data->in_low_bits[IN_READ] =
2049	    w83793_read_value(client, W83793_REG_IN_LOW_BITS[IN_READ]);
2050
2051	for (i = 0; i < ARRAY_SIZE(data->fan); i++) {
2052		if (!(data->has_fan & (1 << i)))
2053			continue;
2054		data->fan[i] =
2055		    w83793_read_value(client, W83793_REG_FAN(i)) << 8;
2056		data->fan[i] |=
2057		    w83793_read_value(client, W83793_REG_FAN(i) + 1);
2058	}
2059
2060	for (i = 0; i < ARRAY_SIZE(data->temp); i++) {
2061		if (!(data->has_temp & (1 << i)))
2062			continue;
2063		data->temp[i][TEMP_READ] =
2064		    w83793_read_value(client, W83793_REG_TEMP[i][TEMP_READ]);
2065	}
2066
2067	data->temp_low_bits =
2068	    w83793_read_value(client, W83793_REG_TEMP_LOW_BITS);
2069
2070	for (i = 0; i < ARRAY_SIZE(data->pwm); i++) {
2071		if (data->has_pwm & (1 << i))
2072			data->pwm[i][PWM_DUTY] =
2073			    w83793_read_value(client,
2074					      W83793_REG_PWM(i, PWM_DUTY));
2075	}
2076
2077	for (i = 0; i < ARRAY_SIZE(data->alarms); i++)
2078		data->alarms[i] =
2079		    w83793_read_value(client, W83793_REG_ALARM(i));
2080	if (data->has_vid & 0x01)
2081		data->vid[0] = w83793_read_value(client, W83793_REG_VID_INA);
2082	if (data->has_vid & 0x02)
2083		data->vid[1] = w83793_read_value(client, W83793_REG_VID_INB);
2084	w83793_update_nonvolatile(dev);
2085	data->last_updated = jiffies;
2086	data->valid = 1;
2087
2088END:
2089	mutex_unlock(&data->update_lock);
2090	return data;
2091}
2092
2093/*
2094 * Ignore the possibility that somebody change bank outside the driver
2095 * Must be called with data->update_lock held, except during initialization
2096 */
2097static u8 w83793_read_value(struct i2c_client *client, u16 reg)
2098{
2099	struct w83793_data *data = i2c_get_clientdata(client);
2100	u8 res;
2101	u8 new_bank = reg >> 8;
2102
2103	new_bank |= data->bank & 0xfc;
2104	if (data->bank != new_bank) {
2105		if (i2c_smbus_write_byte_data
2106		    (client, W83793_REG_BANKSEL, new_bank) >= 0)
2107			data->bank = new_bank;
2108		else {
2109			dev_err(&client->dev,
2110				"set bank to %d failed, fall back "
2111				"to bank %d, read reg 0x%x error\n",
2112				new_bank, data->bank, reg);
2113			res = 0x0;	/* read 0x0 from the chip */
2114			goto END;
2115		}
2116	}
2117	res = i2c_smbus_read_byte_data(client, reg & 0xff);
2118END:
2119	return res;
2120}
2121
2122/* Must be called with data->update_lock held, except during initialization */
2123static int w83793_write_value(struct i2c_client *client, u16 reg, u8 value)
2124{
2125	struct w83793_data *data = i2c_get_clientdata(client);
2126	int res;
2127	u8 new_bank = reg >> 8;
2128
2129	new_bank |= data->bank & 0xfc;
2130	if (data->bank != new_bank) {
2131		res = i2c_smbus_write_byte_data(client, W83793_REG_BANKSEL,
2132						new_bank);
2133		if (res < 0) {
2134			dev_err(&client->dev,
2135				"set bank to %d failed, fall back "
2136				"to bank %d, write reg 0x%x error\n",
2137				new_bank, data->bank, reg);
2138			goto END;
2139		}
2140		data->bank = new_bank;
2141	}
2142
2143	res = i2c_smbus_write_byte_data(client, reg & 0xff, value);
2144END:
2145	return res;
2146}
2147
2148module_i2c_driver(w83793_driver);
2149
2150MODULE_AUTHOR("Yuan Mu, Sven Anders");
2151MODULE_DESCRIPTION("w83793 driver");
2152MODULE_LICENSE("GPL");