1/*
   2 *  it87.c - Part of lm_sensors, Linux kernel modules for hardware
   3 *           monitoring.
   4 *
   5 *  The IT8705F is an LPC-based Super I/O part that contains UARTs, a
   6 *  parallel port, an IR port, a MIDI port, a floppy controller, etc., in
   7 *  addition to an Environment Controller (Enhanced Hardware Monitor and
   8 *  Fan Controller)
   9 *
  10 *  This driver supports only the Environment Controller in the IT8705F and
  11 *  similar parts.  The other devices are supported by different drivers.
  12 *
  13 *  Supports: IT8705F  Super I/O chip w/LPC interface
  14 *            IT8712F  Super I/O chip w/LPC interface
  15 *            IT8716F  Super I/O chip w/LPC interface
  16 *            IT8718F  Super I/O chip w/LPC interface
  17 *            IT8720F  Super I/O chip w/LPC interface
  18 *            IT8721F  Super I/O chip w/LPC interface
  19 *            IT8726F  Super I/O chip w/LPC interface
 
  20 *            IT8758E  Super I/O chip w/LPC interface
 
 
  21 *            Sis950   A clone of the IT8705F
  22 *
  23 *  Copyright (C) 2001 Chris Gauthron
  24 *  Copyright (C) 2005-2010 Jean Delvare <khali@linux-fr.org>
  25 *
  26 *  This program is free software; you can redistribute it and/or modify
  27 *  it under the terms of the GNU General Public License as published by
  28 *  the Free Software Foundation; either version 2 of the License, or
  29 *  (at your option) any later version.
  30 *
  31 *  This program is distributed in the hope that it will be useful,
  32 *  but WITHOUT ANY WARRANTY; without even the implied warranty of
  33 *  MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
  34 *  GNU General Public License for more details.
  35 *
  36 *  You should have received a copy of the GNU General Public License
  37 *  along with this program; if not, write to the Free Software
  38 *  Foundation, Inc., 675 Mass Ave, Cambridge, MA 02139, USA.
  39 */
  40
  41#define pr_fmt(fmt) KBUILD_MODNAME ": " fmt
  42
  43#include <linux/module.h>
  44#include <linux/init.h>
  45#include <linux/slab.h>
  46#include <linux/jiffies.h>
  47#include <linux/platform_device.h>
  48#include <linux/hwmon.h>
  49#include <linux/hwmon-sysfs.h>
  50#include <linux/hwmon-vid.h>
  51#include <linux/err.h>
  52#include <linux/mutex.h>
  53#include <linux/sysfs.h>
  54#include <linux/string.h>
  55#include <linux/dmi.h>
  56#include <linux/acpi.h>
  57#include <linux/io.h>
  58
  59#define DRVNAME "it87"
  60
  61enum chips { it87, it8712, it8716, it8718, it8720, it8721 };
 
  62
  63static unsigned short force_id;
  64module_param(force_id, ushort, 0);
  65MODULE_PARM_DESC(force_id, "Override the detected device ID");
  66
  67static struct platform_device *pdev;
  68
  69#define	REG	0x2e	/* The register to read/write */
  70#define	DEV	0x07	/* Register: Logical device select */
  71#define	VAL	0x2f	/* The value to read/write */
  72#define PME	0x04	/* The device with the fan registers in it */
  73
  74/* The device with the IT8718F/IT8720F VID value in it */
  75#define GPIO	0x07
  76
  77#define	DEVID	0x20	/* Register: Device ID */
  78#define	DEVREV	0x22	/* Register: Device Revision */
  79
  80static inline int superio_inb(int reg)
  81{
  82	outb(reg, REG);
  83	return inb(VAL);
  84}
  85
  86static inline void superio_outb(int reg, int val)
  87{
  88	outb(reg, REG);
  89	outb(val, VAL);
  90}
  91
  92static int superio_inw(int reg)
  93{
  94	int val;
  95	outb(reg++, REG);
  96	val = inb(VAL) << 8;
  97	outb(reg, REG);
  98	val |= inb(VAL);
  99	return val;
 100}
 101
 102static inline void superio_select(int ldn)
 103{
 104	outb(DEV, REG);
 105	outb(ldn, VAL);
 106}
 107
 108static inline int superio_enter(void)
 109{
 110	/*
 111	 * Try to reserve REG and REG + 1 for exclusive access.
 112	 */
 113	if (!request_muxed_region(REG, 2, DRVNAME))
 114		return -EBUSY;
 115
 116	outb(0x87, REG);
 117	outb(0x01, REG);
 118	outb(0x55, REG);
 119	outb(0x55, REG);
 120	return 0;
 121}
 122
 123static inline void superio_exit(void)
 124{
 125	outb(0x02, REG);
 126	outb(0x02, VAL);
 127	release_region(REG, 2);
 128}
 129
 130/* Logical device 4 registers */
 131#define IT8712F_DEVID 0x8712
 132#define IT8705F_DEVID 0x8705
 133#define IT8716F_DEVID 0x8716
 134#define IT8718F_DEVID 0x8718
 135#define IT8720F_DEVID 0x8720
 136#define IT8721F_DEVID 0x8721
 137#define IT8726F_DEVID 0x8726
 
 
 
 138#define IT87_ACT_REG  0x30
 139#define IT87_BASE_REG 0x60
 140
 141/* Logical device 7 registers (IT8712F and later) */
 
 142#define IT87_SIO_GPIO3_REG	0x27
 143#define IT87_SIO_GPIO5_REG	0x29
 
 144#define IT87_SIO_PINX2_REG	0x2c	/* Pin selection */
 
 145#define IT87_SIO_VID_REG	0xfc	/* VID value */
 146#define IT87_SIO_BEEP_PIN_REG	0xf6	/* Beep pin mapping */
 147
 148/* Update battery voltage after every reading if true */
 149static int update_vbat;
 150
 151/* Not all BIOSes properly configure the PWM registers */
 152static int fix_pwm_polarity;
 153
 154/* Many IT87 constants specified below */
 155
 156/* Length of ISA address segment */
 157#define IT87_EXTENT 8
 158
 159/* Length of ISA address segment for Environmental Controller */
 160#define IT87_EC_EXTENT 2
 161
 162/* Offset of EC registers from ISA base address */
 163#define IT87_EC_OFFSET 5
 164
 165/* Where are the ISA address/data registers relative to the EC base address */
 166#define IT87_ADDR_REG_OFFSET 0
 167#define IT87_DATA_REG_OFFSET 1
 168
 169/*----- The IT87 registers -----*/
 170
 171#define IT87_REG_CONFIG        0x00
 172
 173#define IT87_REG_ALARM1        0x01
 174#define IT87_REG_ALARM2        0x02
 175#define IT87_REG_ALARM3        0x03
 176
 177/* The IT8718F and IT8720F have the VID value in a different register, in
 178   Super-I/O configuration space. */
 
 
 179#define IT87_REG_VID           0x0a
 180/* The IT8705F and IT8712F earlier than revision 0x08 use register 0x0b
 181   for fan divisors. Later IT8712F revisions must use 16-bit tachometer
 182   mode. */
 
 
 183#define IT87_REG_FAN_DIV       0x0b
 184#define IT87_REG_FAN_16BIT     0x0c
 185
 186/* Monitors: 9 voltage (0 to 7, battery), 3 temp (1 to 3), 3 fan (1 to 3) */
 187
 188static const u8 IT87_REG_FAN[]		= { 0x0d, 0x0e, 0x0f, 0x80, 0x82 };
 189static const u8 IT87_REG_FAN_MIN[]	= { 0x10, 0x11, 0x12, 0x84, 0x86 };
 190static const u8 IT87_REG_FANX[]		= { 0x18, 0x19, 0x1a, 0x81, 0x83 };
 191static const u8 IT87_REG_FANX_MIN[]	= { 0x1b, 0x1c, 0x1d, 0x85, 0x87 };
 192#define IT87_REG_FAN_MAIN_CTRL 0x13
 193#define IT87_REG_FAN_CTL       0x14
 194#define IT87_REG_PWM(nr)       (0x15 + (nr))
 195#define IT87_REG_PWM_DUTY(nr)  (0x63 + (nr) * 8)
 196
 197#define IT87_REG_VIN(nr)       (0x20 + (nr))
 198#define IT87_REG_TEMP(nr)      (0x29 + (nr))
 199
 200#define IT87_REG_VIN_MAX(nr)   (0x30 + (nr) * 2)
 201#define IT87_REG_VIN_MIN(nr)   (0x31 + (nr) * 2)
 202#define IT87_REG_TEMP_HIGH(nr) (0x40 + (nr) * 2)
 203#define IT87_REG_TEMP_LOW(nr)  (0x41 + (nr) * 2)
 204
 205#define IT87_REG_VIN_ENABLE    0x50
 206#define IT87_REG_TEMP_ENABLE   0x51
 
 207#define IT87_REG_BEEP_ENABLE   0x5c
 208
 209#define IT87_REG_CHIPID        0x58
 210
 211#define IT87_REG_AUTO_TEMP(nr, i) (0x60 + (nr) * 8 + (i))
 212#define IT87_REG_AUTO_PWM(nr, i)  (0x65 + (nr) * 8 + (i))
 213
 214
 215struct it87_sio_data {
 216	enum chips type;
 217	/* Values read from Super-I/O config space */
 218	u8 revision;
 219	u8 vid_value;
 220	u8 beep_pin;
 221	u8 internal;	/* Internal sensors can be labeled */
 222	/* Features skipped based on config or DMI */
 
 223	u8 skip_vid;
 224	u8 skip_fan;
 225	u8 skip_pwm;
 
 226};
 227
 228/* For each registered chip, we need to keep some data in memory.
 229   The structure is dynamically allocated. */
 
 
 230struct it87_data {
 231	struct device *hwmon_dev;
 232	enum chips type;
 233	u8 revision;
 234
 235	unsigned short addr;
 236	const char *name;
 237	struct mutex update_lock;
 238	char valid;		/* !=0 if following fields are valid */
 239	unsigned long last_updated;	/* In jiffies */
 240
 241	u16 in_scaled;		/* Internal voltage sensors are scaled */
 242	u8 in[9];		/* Register value */
 243	u8 in_max[8];		/* Register value */
 244	u8 in_min[8];		/* Register value */
 245	u8 has_fan;		/* Bitfield, fans enabled */
 246	u16 fan[5];		/* Register values, possibly combined */
 247	u16 fan_min[5];		/* Register values, possibly combined */
 
 248	s8 temp[3];		/* Register value */
 249	s8 temp_high[3];	/* Register value */
 250	s8 temp_low[3];		/* Register value */
 251	u8 sensor;		/* Register value */
 252	u8 fan_div[3];		/* Register encoding, shifted right */
 253	u8 vid;			/* Register encoding, combined */
 254	u8 vrm;
 255	u32 alarms;		/* Register encoding, combined */
 256	u8 beeps;		/* Register encoding */
 257	u8 fan_main_ctrl;	/* Register value */
 258	u8 fan_ctl;		/* Register value */
 259
 260	/* The following 3 arrays correspond to the same registers up to
 
 261	 * the IT8720F. The meaning of bits 6-0 depends on the value of bit
 262	 * 7, and we want to preserve settings on mode changes, so we have
 263	 * to track all values separately.
 264	 * Starting with the IT8721F, the manual PWM duty cycles are stored
 265	 * in separate registers (8-bit values), so the separate tracking
 266	 * is no longer needed, but it is still done to keep the driver
 267	 * simple. */
 
 268	u8 pwm_ctrl[3];		/* Register value */
 269	u8 pwm_duty[3];		/* Manual PWM value set by user */
 270	u8 pwm_temp_map[3];	/* PWM to temp. chan. mapping (bits 1-0) */
 271
 272	/* Automatic fan speed control registers */
 273	u8 auto_pwm[3][4];	/* [nr][3] is hard-coded */
 274	s8 auto_temp[3][5];	/* [nr][0] is point1_temp_hyst */
 275};
 276
 277static u8 in_to_reg(const struct it87_data *data, int nr, long val)
 278{
 279	long lsb;
 
 
 
 
 
 
 280
 281	if (data->type == it8721) {
 282		if (data->in_scaled & (1 << nr))
 283			lsb = 24;
 284		else
 285			lsb = 12;
 286	} else
 287		lsb = 16;
 
 
 
 
 
 
 
 
 
 
 288
 289	val = DIV_ROUND_CLOSEST(val, lsb);
 
 
 290	return SENSORS_LIMIT(val, 0, 255);
 291}
 292
 293static int in_from_reg(const struct it87_data *data, int nr, int val)
 294{
 295	if (data->type == it8721) {
 296		if (data->in_scaled & (1 << nr))
 297			return val * 24;
 298		else
 299			return val * 12;
 300	} else
 301		return val * 16;
 302}
 303
 304static inline u8 FAN_TO_REG(long rpm, int div)
 305{
 306	if (rpm == 0)
 307		return 255;
 308	rpm = SENSORS_LIMIT(rpm, 1, 1000000);
 309	return SENSORS_LIMIT((1350000 + rpm * div / 2) / (rpm * div), 1,
 310			     254);
 311}
 312
 313static inline u16 FAN16_TO_REG(long rpm)
 314{
 315	if (rpm == 0)
 316		return 0xffff;
 317	return SENSORS_LIMIT((1350000 + rpm) / (rpm * 2), 1, 0xfffe);
 318}
 319
 320#define FAN_FROM_REG(val, div) ((val) == 0 ? -1 : (val) == 255 ? 0 : \
 321				1350000 / ((val) * (div)))
 322/* The divider is fixed to 2 in 16-bit mode */
 323#define FAN16_FROM_REG(val) ((val) == 0 ? -1 : (val) == 0xffff ? 0 : \
 324			     1350000 / ((val) * 2))
 325
 326#define TEMP_TO_REG(val) (SENSORS_LIMIT(((val) < 0 ? (((val) - 500) / 1000) : \
 327					((val) + 500) / 1000), -128, 127))
 328#define TEMP_FROM_REG(val) ((val) * 1000)
 329
 330static u8 pwm_to_reg(const struct it87_data *data, long val)
 331{
 332	if (data->type == it8721)
 333		return val;
 334	else
 335		return val >> 1;
 336}
 337
 338static int pwm_from_reg(const struct it87_data *data, u8 reg)
 339{
 340	if (data->type == it8721)
 341		return reg;
 342	else
 343		return (reg & 0x7f) << 1;
 344}
 345
 346
 347static int DIV_TO_REG(int val)
 348{
 349	int answer = 0;
 350	while (answer < 7 && (val >>= 1))
 351		answer++;
 352	return answer;
 353}
 354#define DIV_FROM_REG(val) (1 << (val))
 355
 356static const unsigned int pwm_freq[8] = {
 357	48000000 / 128,
 358	24000000 / 128,
 359	12000000 / 128,
 360	8000000 / 128,
 361	6000000 / 128,
 362	3000000 / 128,
 363	1500000 / 128,
 364	750000 / 128,
 365};
 366
 367static inline int has_16bit_fans(const struct it87_data *data)
 368{
 369	/* IT8705F Datasheet 0.4.1, 3h == Version G.
 370	   IT8712F Datasheet 0.9.1, section 8.3.5 indicates 8h == Version J.
 371	   These are the first revisions with 16bit tachometer support. */
 
 
 372	return (data->type == it87 && data->revision >= 0x03)
 373	    || (data->type == it8712 && data->revision >= 0x08)
 374	    || data->type == it8716
 375	    || data->type == it8718
 376	    || data->type == it8720
 377	    || data->type == it8721;
 
 
 
 378}
 379
 380static inline int has_old_autopwm(const struct it87_data *data)
 381{
 382	/* The old automatic fan speed control interface is implemented
 383	   by IT8705F chips up to revision F and IT8712F chips up to
 384	   revision G. */
 
 
 385	return (data->type == it87 && data->revision < 0x03)
 386	    || (data->type == it8712 && data->revision < 0x08);
 387}
 388
 389static int it87_probe(struct platform_device *pdev);
 390static int __devexit it87_remove(struct platform_device *pdev);
 391
 392static int it87_read_value(struct it87_data *data, u8 reg);
 393static void it87_write_value(struct it87_data *data, u8 reg, u8 value);
 394static struct it87_data *it87_update_device(struct device *dev);
 395static int it87_check_pwm(struct device *dev);
 396static void it87_init_device(struct platform_device *pdev);
 397
 398
 399static struct platform_driver it87_driver = {
 400	.driver = {
 401		.owner	= THIS_MODULE,
 402		.name	= DRVNAME,
 403	},
 404	.probe	= it87_probe,
 405	.remove	= __devexit_p(it87_remove),
 406};
 407
 408static ssize_t show_in(struct device *dev, struct device_attribute *attr,
 409		char *buf)
 410{
 411	struct sensor_device_attribute *sensor_attr = to_sensor_dev_attr(attr);
 412	int nr = sensor_attr->index;
 413
 414	struct it87_data *data = it87_update_device(dev);
 415	return sprintf(buf, "%d\n", in_from_reg(data, nr, data->in[nr]));
 416}
 417
 418static ssize_t show_in_min(struct device *dev, struct device_attribute *attr,
 419		char *buf)
 420{
 421	struct sensor_device_attribute *sensor_attr = to_sensor_dev_attr(attr);
 422	int nr = sensor_attr->index;
 423
 424	struct it87_data *data = it87_update_device(dev);
 425	return sprintf(buf, "%d\n", in_from_reg(data, nr, data->in_min[nr]));
 426}
 427
 428static ssize_t show_in_max(struct device *dev, struct device_attribute *attr,
 429		char *buf)
 430{
 431	struct sensor_device_attribute *sensor_attr = to_sensor_dev_attr(attr);
 432	int nr = sensor_attr->index;
 433
 434	struct it87_data *data = it87_update_device(dev);
 435	return sprintf(buf, "%d\n", in_from_reg(data, nr, data->in_max[nr]));
 436}
 437
 438static ssize_t set_in_min(struct device *dev, struct device_attribute *attr,
 439		const char *buf, size_t count)
 440{
 441	struct sensor_device_attribute *sensor_attr = to_sensor_dev_attr(attr);
 442	int nr = sensor_attr->index;
 443
 444	struct it87_data *data = dev_get_drvdata(dev);
 445	unsigned long val;
 446
 447	if (strict_strtoul(buf, 10, &val) < 0)
 448		return -EINVAL;
 449
 450	mutex_lock(&data->update_lock);
 451	data->in_min[nr] = in_to_reg(data, nr, val);
 452	it87_write_value(data, IT87_REG_VIN_MIN(nr),
 453			data->in_min[nr]);
 454	mutex_unlock(&data->update_lock);
 455	return count;
 456}
 457static ssize_t set_in_max(struct device *dev, struct device_attribute *attr,
 458		const char *buf, size_t count)
 459{
 460	struct sensor_device_attribute *sensor_attr = to_sensor_dev_attr(attr);
 461	int nr = sensor_attr->index;
 462
 463	struct it87_data *data = dev_get_drvdata(dev);
 464	unsigned long val;
 465
 466	if (strict_strtoul(buf, 10, &val) < 0)
 467		return -EINVAL;
 468
 469	mutex_lock(&data->update_lock);
 470	data->in_max[nr] = in_to_reg(data, nr, val);
 471	it87_write_value(data, IT87_REG_VIN_MAX(nr),
 472			data->in_max[nr]);
 473	mutex_unlock(&data->update_lock);
 474	return count;
 475}
 476
 477#define show_in_offset(offset)					\
 478static SENSOR_DEVICE_ATTR(in##offset##_input, S_IRUGO,		\
 479		show_in, NULL, offset);
 480
 481#define limit_in_offset(offset)					\
 482static SENSOR_DEVICE_ATTR(in##offset##_min, S_IRUGO | S_IWUSR,	\
 483		show_in_min, set_in_min, offset);		\
 484static SENSOR_DEVICE_ATTR(in##offset##_max, S_IRUGO | S_IWUSR,	\
 485		show_in_max, set_in_max, offset);
 486
 487show_in_offset(0);
 488limit_in_offset(0);
 489show_in_offset(1);
 490limit_in_offset(1);
 491show_in_offset(2);
 492limit_in_offset(2);
 493show_in_offset(3);
 494limit_in_offset(3);
 495show_in_offset(4);
 496limit_in_offset(4);
 497show_in_offset(5);
 498limit_in_offset(5);
 499show_in_offset(6);
 500limit_in_offset(6);
 501show_in_offset(7);
 502limit_in_offset(7);
 503show_in_offset(8);
 504
 505/* 3 temperatures */
 506static ssize_t show_temp(struct device *dev, struct device_attribute *attr,
 507		char *buf)
 508{
 509	struct sensor_device_attribute *sensor_attr = to_sensor_dev_attr(attr);
 510	int nr = sensor_attr->index;
 511
 512	struct it87_data *data = it87_update_device(dev);
 513	return sprintf(buf, "%d\n", TEMP_FROM_REG(data->temp[nr]));
 514}
 515static ssize_t show_temp_max(struct device *dev, struct device_attribute *attr,
 516		char *buf)
 517{
 518	struct sensor_device_attribute *sensor_attr = to_sensor_dev_attr(attr);
 519	int nr = sensor_attr->index;
 520
 521	struct it87_data *data = it87_update_device(dev);
 522	return sprintf(buf, "%d\n", TEMP_FROM_REG(data->temp_high[nr]));
 523}
 524static ssize_t show_temp_min(struct device *dev, struct device_attribute *attr,
 525		char *buf)
 526{
 527	struct sensor_device_attribute *sensor_attr = to_sensor_dev_attr(attr);
 528	int nr = sensor_attr->index;
 529
 530	struct it87_data *data = it87_update_device(dev);
 531	return sprintf(buf, "%d\n", TEMP_FROM_REG(data->temp_low[nr]));
 532}
 533static ssize_t set_temp_max(struct device *dev, struct device_attribute *attr,
 534		const char *buf, size_t count)
 535{
 536	struct sensor_device_attribute *sensor_attr = to_sensor_dev_attr(attr);
 537	int nr = sensor_attr->index;
 538
 539	struct it87_data *data = dev_get_drvdata(dev);
 540	long val;
 541
 542	if (strict_strtol(buf, 10, &val) < 0)
 543		return -EINVAL;
 544
 545	mutex_lock(&data->update_lock);
 546	data->temp_high[nr] = TEMP_TO_REG(val);
 547	it87_write_value(data, IT87_REG_TEMP_HIGH(nr), data->temp_high[nr]);
 548	mutex_unlock(&data->update_lock);
 549	return count;
 550}
 551static ssize_t set_temp_min(struct device *dev, struct device_attribute *attr,
 552		const char *buf, size_t count)
 553{
 554	struct sensor_device_attribute *sensor_attr = to_sensor_dev_attr(attr);
 555	int nr = sensor_attr->index;
 556
 557	struct it87_data *data = dev_get_drvdata(dev);
 558	long val;
 559
 560	if (strict_strtol(buf, 10, &val) < 0)
 561		return -EINVAL;
 562
 563	mutex_lock(&data->update_lock);
 564	data->temp_low[nr] = TEMP_TO_REG(val);
 565	it87_write_value(data, IT87_REG_TEMP_LOW(nr), data->temp_low[nr]);
 566	mutex_unlock(&data->update_lock);
 567	return count;
 568}
 569#define show_temp_offset(offset)					\
 570static SENSOR_DEVICE_ATTR(temp##offset##_input, S_IRUGO,		\
 571		show_temp, NULL, offset - 1);				\
 572static SENSOR_DEVICE_ATTR(temp##offset##_max, S_IRUGO | S_IWUSR,	\
 573		show_temp_max, set_temp_max, offset - 1);		\
 574static SENSOR_DEVICE_ATTR(temp##offset##_min, S_IRUGO | S_IWUSR,	\
 575		show_temp_min, set_temp_min, offset - 1);
 576
 577show_temp_offset(1);
 578show_temp_offset(2);
 579show_temp_offset(3);
 580
 581static ssize_t show_sensor(struct device *dev, struct device_attribute *attr,
 582		char *buf)
 583{
 584	struct sensor_device_attribute *sensor_attr = to_sensor_dev_attr(attr);
 585	int nr = sensor_attr->index;
 586
 587	struct it87_data *data = it87_update_device(dev);
 588	u8 reg = data->sensor;		/* In case the value is updated while
 589					   we use it */
 590
 591	if (reg & (1 << nr))
 592		return sprintf(buf, "3\n");  /* thermal diode */
 593	if (reg & (8 << nr))
 594		return sprintf(buf, "4\n");  /* thermistor */
 595	return sprintf(buf, "0\n");      /* disabled */
 596}
 597static ssize_t set_sensor(struct device *dev, struct device_attribute *attr,
 598		const char *buf, size_t count)
 599{
 600	struct sensor_device_attribute *sensor_attr = to_sensor_dev_attr(attr);
 601	int nr = sensor_attr->index;
 602
 603	struct it87_data *data = dev_get_drvdata(dev);
 604	long val;
 605	u8 reg;
 606
 607	if (strict_strtol(buf, 10, &val) < 0)
 608		return -EINVAL;
 609
 610	reg = it87_read_value(data, IT87_REG_TEMP_ENABLE);
 611	reg &= ~(1 << nr);
 612	reg &= ~(8 << nr);
 613	if (val == 2) {	/* backwards compatibility */
 614		dev_warn(dev, "Sensor type 2 is deprecated, please use 4 "
 615			 "instead\n");
 616		val = 4;
 617	}
 618	/* 3 = thermal diode; 4 = thermistor; 0 = disabled */
 619	if (val == 3)
 620		reg |= 1 << nr;
 621	else if (val == 4)
 622		reg |= 8 << nr;
 623	else if (val != 0)
 624		return -EINVAL;
 625
 626	mutex_lock(&data->update_lock);
 627	data->sensor = reg;
 628	it87_write_value(data, IT87_REG_TEMP_ENABLE, data->sensor);
 629	data->valid = 0;	/* Force cache refresh */
 630	mutex_unlock(&data->update_lock);
 631	return count;
 632}
 633#define show_sensor_offset(offset)					\
 634static SENSOR_DEVICE_ATTR(temp##offset##_type, S_IRUGO | S_IWUSR,	\
 635		show_sensor, set_sensor, offset - 1);
 636
 637show_sensor_offset(1);
 638show_sensor_offset(2);
 639show_sensor_offset(3);
 640
 641/* 3 Fans */
 642
 643static int pwm_mode(const struct it87_data *data, int nr)
 644{
 645	int ctrl = data->fan_main_ctrl & (1 << nr);
 646
 647	if (ctrl == 0)					/* Full speed */
 648		return 0;
 649	if (data->pwm_ctrl[nr] & 0x80)			/* Automatic mode */
 650		return 2;
 651	else						/* Manual mode */
 652		return 1;
 653}
 654
 655static ssize_t show_fan(struct device *dev, struct device_attribute *attr,
 656		char *buf)
 657{
 658	struct sensor_device_attribute *sensor_attr = to_sensor_dev_attr(attr);
 659	int nr = sensor_attr->index;
 660
 661	struct it87_data *data = it87_update_device(dev);
 662	return sprintf(buf, "%d\n", FAN_FROM_REG(data->fan[nr],
 663				DIV_FROM_REG(data->fan_div[nr])));
 664}
 665static ssize_t show_fan_min(struct device *dev, struct device_attribute *attr,
 666		char *buf)
 667{
 668	struct sensor_device_attribute *sensor_attr = to_sensor_dev_attr(attr);
 669	int nr = sensor_attr->index;
 670
 671	struct it87_data *data = it87_update_device(dev);
 672	return sprintf(buf, "%d\n", FAN_FROM_REG(data->fan_min[nr],
 673				DIV_FROM_REG(data->fan_div[nr])));
 674}
 675static ssize_t show_fan_div(struct device *dev, struct device_attribute *attr,
 676		char *buf)
 677{
 678	struct sensor_device_attribute *sensor_attr = to_sensor_dev_attr(attr);
 679	int nr = sensor_attr->index;
 680
 681	struct it87_data *data = it87_update_device(dev);
 682	return sprintf(buf, "%d\n", DIV_FROM_REG(data->fan_div[nr]));
 683}
 684static ssize_t show_pwm_enable(struct device *dev,
 685		struct device_attribute *attr, char *buf)
 686{
 687	struct sensor_device_attribute *sensor_attr = to_sensor_dev_attr(attr);
 688	int nr = sensor_attr->index;
 689
 690	struct it87_data *data = it87_update_device(dev);
 691	return sprintf(buf, "%d\n", pwm_mode(data, nr));
 692}
 693static ssize_t show_pwm(struct device *dev, struct device_attribute *attr,
 694		char *buf)
 695{
 696	struct sensor_device_attribute *sensor_attr = to_sensor_dev_attr(attr);
 697	int nr = sensor_attr->index;
 698
 699	struct it87_data *data = it87_update_device(dev);
 700	return sprintf(buf, "%d\n",
 701		       pwm_from_reg(data, data->pwm_duty[nr]));
 702}
 703static ssize_t show_pwm_freq(struct device *dev, struct device_attribute *attr,
 704		char *buf)
 705{
 706	struct it87_data *data = it87_update_device(dev);
 707	int index = (data->fan_ctl >> 4) & 0x07;
 708
 709	return sprintf(buf, "%u\n", pwm_freq[index]);
 710}
 711static ssize_t set_fan_min(struct device *dev, struct device_attribute *attr,
 712		const char *buf, size_t count)
 713{
 714	struct sensor_device_attribute *sensor_attr = to_sensor_dev_attr(attr);
 715	int nr = sensor_attr->index;
 716
 717	struct it87_data *data = dev_get_drvdata(dev);
 718	long val;
 719	u8 reg;
 720
 721	if (strict_strtol(buf, 10, &val) < 0)
 722		return -EINVAL;
 723
 724	mutex_lock(&data->update_lock);
 725	reg = it87_read_value(data, IT87_REG_FAN_DIV);
 726	switch (nr) {
 727	case 0:
 728		data->fan_div[nr] = reg & 0x07;
 729		break;
 730	case 1:
 731		data->fan_div[nr] = (reg >> 3) & 0x07;
 732		break;
 733	case 2:
 734		data->fan_div[nr] = (reg & 0x40) ? 3 : 1;
 735		break;
 736	}
 737
 738	data->fan_min[nr] = FAN_TO_REG(val, DIV_FROM_REG(data->fan_div[nr]));
 739	it87_write_value(data, IT87_REG_FAN_MIN[nr], data->fan_min[nr]);
 740	mutex_unlock(&data->update_lock);
 741	return count;
 742}
 743static ssize_t set_fan_div(struct device *dev, struct device_attribute *attr,
 744		const char *buf, size_t count)
 745{
 746	struct sensor_device_attribute *sensor_attr = to_sensor_dev_attr(attr);
 747	int nr = sensor_attr->index;
 748
 749	struct it87_data *data = dev_get_drvdata(dev);
 750	unsigned long val;
 751	int min;
 752	u8 old;
 753
 754	if (strict_strtoul(buf, 10, &val) < 0)
 755		return -EINVAL;
 756
 757	mutex_lock(&data->update_lock);
 758	old = it87_read_value(data, IT87_REG_FAN_DIV);
 759
 760	/* Save fan min limit */
 761	min = FAN_FROM_REG(data->fan_min[nr], DIV_FROM_REG(data->fan_div[nr]));
 762
 763	switch (nr) {
 764	case 0:
 765	case 1:
 766		data->fan_div[nr] = DIV_TO_REG(val);
 767		break;
 768	case 2:
 769		if (val < 8)
 770			data->fan_div[nr] = 1;
 771		else
 772			data->fan_div[nr] = 3;
 773	}
 774	val = old & 0x80;
 775	val |= (data->fan_div[0] & 0x07);
 776	val |= (data->fan_div[1] & 0x07) << 3;
 777	if (data->fan_div[2] == 3)
 778		val |= 0x1 << 6;
 779	it87_write_value(data, IT87_REG_FAN_DIV, val);
 780
 781	/* Restore fan min limit */
 782	data->fan_min[nr] = FAN_TO_REG(min, DIV_FROM_REG(data->fan_div[nr]));
 783	it87_write_value(data, IT87_REG_FAN_MIN[nr], data->fan_min[nr]);
 784
 785	mutex_unlock(&data->update_lock);
 786	return count;
 787}
 788
 789/* Returns 0 if OK, -EINVAL otherwise */
 790static int check_trip_points(struct device *dev, int nr)
 791{
 792	const struct it87_data *data = dev_get_drvdata(dev);
 793	int i, err = 0;
 794
 795	if (has_old_autopwm(data)) {
 796		for (i = 0; i < 3; i++) {
 797			if (data->auto_temp[nr][i] > data->auto_temp[nr][i + 1])
 798				err = -EINVAL;
 799		}
 800		for (i = 0; i < 2; i++) {
 801			if (data->auto_pwm[nr][i] > data->auto_pwm[nr][i + 1])
 802				err = -EINVAL;
 803		}
 804	}
 805
 806	if (err) {
 807		dev_err(dev, "Inconsistent trip points, not switching to "
 808			"automatic mode\n");
 809		dev_err(dev, "Adjust the trip points and try again\n");
 810	}
 811	return err;
 812}
 813
 814static ssize_t set_pwm_enable(struct device *dev,
 815		struct device_attribute *attr, const char *buf, size_t count)
 816{
 817	struct sensor_device_attribute *sensor_attr = to_sensor_dev_attr(attr);
 818	int nr = sensor_attr->index;
 819
 820	struct it87_data *data = dev_get_drvdata(dev);
 821	long val;
 822
 823	if (strict_strtol(buf, 10, &val) < 0 || val < 0 || val > 2)
 824		return -EINVAL;
 825
 826	/* Check trip points before switching to automatic mode */
 827	if (val == 2) {
 828		if (check_trip_points(dev, nr) < 0)
 829			return -EINVAL;
 830	}
 831
 832	mutex_lock(&data->update_lock);
 833
 834	if (val == 0) {
 835		int tmp;
 836		/* make sure the fan is on when in on/off mode */
 837		tmp = it87_read_value(data, IT87_REG_FAN_CTL);
 838		it87_write_value(data, IT87_REG_FAN_CTL, tmp | (1 << nr));
 839		/* set on/off mode */
 840		data->fan_main_ctrl &= ~(1 << nr);
 841		it87_write_value(data, IT87_REG_FAN_MAIN_CTRL,
 842				 data->fan_main_ctrl);
 843	} else {
 844		if (val == 1)				/* Manual mode */
 845			data->pwm_ctrl[nr] = data->type == it8721 ?
 846					     data->pwm_temp_map[nr] :
 847					     data->pwm_duty[nr];
 848		else					/* Automatic mode */
 849			data->pwm_ctrl[nr] = 0x80 | data->pwm_temp_map[nr];
 850		it87_write_value(data, IT87_REG_PWM(nr), data->pwm_ctrl[nr]);
 851		/* set SmartGuardian mode */
 852		data->fan_main_ctrl |= (1 << nr);
 853		it87_write_value(data, IT87_REG_FAN_MAIN_CTRL,
 854				 data->fan_main_ctrl);
 855	}
 856
 857	mutex_unlock(&data->update_lock);
 858	return count;
 859}
 860static ssize_t set_pwm(struct device *dev, struct device_attribute *attr,
 861		const char *buf, size_t count)
 862{
 863	struct sensor_device_attribute *sensor_attr = to_sensor_dev_attr(attr);
 864	int nr = sensor_attr->index;
 865
 866	struct it87_data *data = dev_get_drvdata(dev);
 867	long val;
 868
 869	if (strict_strtol(buf, 10, &val) < 0 || val < 0 || val > 255)
 870		return -EINVAL;
 871
 872	mutex_lock(&data->update_lock);
 873	if (data->type == it8721) {
 874		/* If we are in automatic mode, the PWM duty cycle register
 875		 * is read-only so we can't write the value */
 
 
 876		if (data->pwm_ctrl[nr] & 0x80) {
 877			mutex_unlock(&data->update_lock);
 878			return -EBUSY;
 879		}
 880		data->pwm_duty[nr] = pwm_to_reg(data, val);
 881		it87_write_value(data, IT87_REG_PWM_DUTY(nr),
 882				 data->pwm_duty[nr]);
 883	} else {
 884		data->pwm_duty[nr] = pwm_to_reg(data, val);
 885		/* If we are in manual mode, write the duty cycle immediately;
 886		 * otherwise, just store it for later use. */
 
 
 887		if (!(data->pwm_ctrl[nr] & 0x80)) {
 888			data->pwm_ctrl[nr] = data->pwm_duty[nr];
 889			it87_write_value(data, IT87_REG_PWM(nr),
 890					 data->pwm_ctrl[nr]);
 891		}
 892	}
 893	mutex_unlock(&data->update_lock);
 894	return count;
 895}
 896static ssize_t set_pwm_freq(struct device *dev,
 897		struct device_attribute *attr, const char *buf, size_t count)
 898{
 899	struct it87_data *data = dev_get_drvdata(dev);
 900	unsigned long val;
 901	int i;
 902
 903	if (strict_strtoul(buf, 10, &val) < 0)
 904		return -EINVAL;
 905
 906	/* Search for the nearest available frequency */
 907	for (i = 0; i < 7; i++) {
 908		if (val > (pwm_freq[i] + pwm_freq[i+1]) / 2)
 909			break;
 910	}
 911
 912	mutex_lock(&data->update_lock);
 913	data->fan_ctl = it87_read_value(data, IT87_REG_FAN_CTL) & 0x8f;
 914	data->fan_ctl |= i << 4;
 915	it87_write_value(data, IT87_REG_FAN_CTL, data->fan_ctl);
 916	mutex_unlock(&data->update_lock);
 917
 918	return count;
 919}
 920static ssize_t show_pwm_temp_map(struct device *dev,
 921		struct device_attribute *attr, char *buf)
 922{
 923	struct sensor_device_attribute *sensor_attr = to_sensor_dev_attr(attr);
 924	int nr = sensor_attr->index;
 925
 926	struct it87_data *data = it87_update_device(dev);
 927	int map;
 928
 929	if (data->pwm_temp_map[nr] < 3)
 930		map = 1 << data->pwm_temp_map[nr];
 931	else
 932		map = 0;			/* Should never happen */
 933	return sprintf(buf, "%d\n", map);
 934}
 935static ssize_t set_pwm_temp_map(struct device *dev,
 936		struct device_attribute *attr, const char *buf, size_t count)
 937{
 938	struct sensor_device_attribute *sensor_attr = to_sensor_dev_attr(attr);
 939	int nr = sensor_attr->index;
 940
 941	struct it87_data *data = dev_get_drvdata(dev);
 942	long val;
 943	u8 reg;
 944
 945	/* This check can go away if we ever support automatic fan speed
 946	   control on newer chips. */
 
 
 947	if (!has_old_autopwm(data)) {
 948		dev_notice(dev, "Mapping change disabled for safety reasons\n");
 949		return -EINVAL;
 950	}
 951
 952	if (strict_strtol(buf, 10, &val) < 0)
 953		return -EINVAL;
 954
 955	switch (val) {
 956	case (1 << 0):
 957		reg = 0x00;
 958		break;
 959	case (1 << 1):
 960		reg = 0x01;
 961		break;
 962	case (1 << 2):
 963		reg = 0x02;
 964		break;
 965	default:
 966		return -EINVAL;
 967	}
 968
 969	mutex_lock(&data->update_lock);
 970	data->pwm_temp_map[nr] = reg;
 971	/* If we are in automatic mode, write the temp mapping immediately;
 972	 * otherwise, just store it for later use. */
 
 
 973	if (data->pwm_ctrl[nr] & 0x80) {
 974		data->pwm_ctrl[nr] = 0x80 | data->pwm_temp_map[nr];
 975		it87_write_value(data, IT87_REG_PWM(nr), data->pwm_ctrl[nr]);
 976	}
 977	mutex_unlock(&data->update_lock);
 978	return count;
 979}
 980
 981static ssize_t show_auto_pwm(struct device *dev,
 982		struct device_attribute *attr, char *buf)
 983{
 984	struct it87_data *data = it87_update_device(dev);
 985	struct sensor_device_attribute_2 *sensor_attr =
 986			to_sensor_dev_attr_2(attr);
 987	int nr = sensor_attr->nr;
 988	int point = sensor_attr->index;
 989
 990	return sprintf(buf, "%d\n",
 991		       pwm_from_reg(data, data->auto_pwm[nr][point]));
 992}
 993
 994static ssize_t set_auto_pwm(struct device *dev,
 995		struct device_attribute *attr, const char *buf, size_t count)
 996{
 997	struct it87_data *data = dev_get_drvdata(dev);
 998	struct sensor_device_attribute_2 *sensor_attr =
 999			to_sensor_dev_attr_2(attr);
1000	int nr = sensor_attr->nr;
1001	int point = sensor_attr->index;
1002	long val;
1003
1004	if (strict_strtol(buf, 10, &val) < 0 || val < 0 || val > 255)
1005		return -EINVAL;
1006
1007	mutex_lock(&data->update_lock);
1008	data->auto_pwm[nr][point] = pwm_to_reg(data, val);
1009	it87_write_value(data, IT87_REG_AUTO_PWM(nr, point),
1010			 data->auto_pwm[nr][point]);
1011	mutex_unlock(&data->update_lock);
1012	return count;
1013}
1014
1015static ssize_t show_auto_temp(struct device *dev,
1016		struct device_attribute *attr, char *buf)
1017{
1018	struct it87_data *data = it87_update_device(dev);
1019	struct sensor_device_attribute_2 *sensor_attr =
1020			to_sensor_dev_attr_2(attr);
1021	int nr = sensor_attr->nr;
1022	int point = sensor_attr->index;
1023
1024	return sprintf(buf, "%d\n", TEMP_FROM_REG(data->auto_temp[nr][point]));
1025}
1026
1027static ssize_t set_auto_temp(struct device *dev,
1028		struct device_attribute *attr, const char *buf, size_t count)
1029{
1030	struct it87_data *data = dev_get_drvdata(dev);
1031	struct sensor_device_attribute_2 *sensor_attr =
1032			to_sensor_dev_attr_2(attr);
1033	int nr = sensor_attr->nr;
1034	int point = sensor_attr->index;
1035	long val;
1036
1037	if (strict_strtol(buf, 10, &val) < 0 || val < -128000 || val > 127000)
1038		return -EINVAL;
1039
1040	mutex_lock(&data->update_lock);
1041	data->auto_temp[nr][point] = TEMP_TO_REG(val);
1042	it87_write_value(data, IT87_REG_AUTO_TEMP(nr, point),
1043			 data->auto_temp[nr][point]);
1044	mutex_unlock(&data->update_lock);
1045	return count;
1046}
1047
1048#define show_fan_offset(offset)					\
1049static SENSOR_DEVICE_ATTR(fan##offset##_input, S_IRUGO,		\
1050		show_fan, NULL, offset - 1);			\
1051static SENSOR_DEVICE_ATTR(fan##offset##_min, S_IRUGO | S_IWUSR, \
1052		show_fan_min, set_fan_min, offset - 1);		\
1053static SENSOR_DEVICE_ATTR(fan##offset##_div, S_IRUGO | S_IWUSR, \
1054		show_fan_div, set_fan_div, offset - 1);
1055
1056show_fan_offset(1);
1057show_fan_offset(2);
1058show_fan_offset(3);
1059
1060#define show_pwm_offset(offset)						\
1061static SENSOR_DEVICE_ATTR(pwm##offset##_enable, S_IRUGO | S_IWUSR,	\
1062		show_pwm_enable, set_pwm_enable, offset - 1);		\
1063static SENSOR_DEVICE_ATTR(pwm##offset, S_IRUGO | S_IWUSR,		\
1064		show_pwm, set_pwm, offset - 1);				\
1065static DEVICE_ATTR(pwm##offset##_freq,					\
1066		(offset == 1 ? S_IRUGO | S_IWUSR : S_IRUGO),		\
1067		show_pwm_freq, (offset == 1 ? set_pwm_freq : NULL));	\
1068static SENSOR_DEVICE_ATTR(pwm##offset##_auto_channels_temp,		\
1069		S_IRUGO | S_IWUSR, show_pwm_temp_map, set_pwm_temp_map,	\
1070		offset - 1);						\
1071static SENSOR_DEVICE_ATTR_2(pwm##offset##_auto_point1_pwm,		\
1072		S_IRUGO | S_IWUSR, show_auto_pwm, set_auto_pwm,		\
1073		offset - 1, 0);						\
1074static SENSOR_DEVICE_ATTR_2(pwm##offset##_auto_point2_pwm,		\
1075		S_IRUGO | S_IWUSR, show_auto_pwm, set_auto_pwm,		\
1076		offset - 1, 1);						\
1077static SENSOR_DEVICE_ATTR_2(pwm##offset##_auto_point3_pwm,		\
1078		S_IRUGO | S_IWUSR, show_auto_pwm, set_auto_pwm,		\
1079		offset - 1, 2);						\
1080static SENSOR_DEVICE_ATTR_2(pwm##offset##_auto_point4_pwm,		\
1081		S_IRUGO, show_auto_pwm, NULL, offset - 1, 3);		\
1082static SENSOR_DEVICE_ATTR_2(pwm##offset##_auto_point1_temp,		\
1083		S_IRUGO | S_IWUSR, show_auto_temp, set_auto_temp,	\
1084		offset - 1, 1);						\
1085static SENSOR_DEVICE_ATTR_2(pwm##offset##_auto_point1_temp_hyst,	\
1086		S_IRUGO | S_IWUSR, show_auto_temp, set_auto_temp,	\
1087		offset - 1, 0);						\
1088static SENSOR_DEVICE_ATTR_2(pwm##offset##_auto_point2_temp,		\
1089		S_IRUGO | S_IWUSR, show_auto_temp, set_auto_temp,	\
1090		offset - 1, 2);						\
1091static SENSOR_DEVICE_ATTR_2(pwm##offset##_auto_point3_temp,		\
1092		S_IRUGO | S_IWUSR, show_auto_temp, set_auto_temp,	\
1093		offset - 1, 3);						\
1094static SENSOR_DEVICE_ATTR_2(pwm##offset##_auto_point4_temp,		\
1095		S_IRUGO | S_IWUSR, show_auto_temp, set_auto_temp,	\
1096		offset - 1, 4);
1097
1098show_pwm_offset(1);
1099show_pwm_offset(2);
1100show_pwm_offset(3);
1101
1102/* A different set of callbacks for 16-bit fans */
1103static ssize_t show_fan16(struct device *dev, struct device_attribute *attr,
1104		char *buf)
1105{
1106	struct sensor_device_attribute *sensor_attr = to_sensor_dev_attr(attr);
1107	int nr = sensor_attr->index;
1108	struct it87_data *data = it87_update_device(dev);
1109	return sprintf(buf, "%d\n", FAN16_FROM_REG(data->fan[nr]));
1110}
1111
1112static ssize_t show_fan16_min(struct device *dev, struct device_attribute *attr,
1113		char *buf)
1114{
1115	struct sensor_device_attribute *sensor_attr = to_sensor_dev_attr(attr);
1116	int nr = sensor_attr->index;
1117	struct it87_data *data = it87_update_device(dev);
1118	return sprintf(buf, "%d\n", FAN16_FROM_REG(data->fan_min[nr]));
1119}
1120
1121static ssize_t set_fan16_min(struct device *dev, struct device_attribute *attr,
1122		const char *buf, size_t count)
1123{
1124	struct sensor_device_attribute *sensor_attr = to_sensor_dev_attr(attr);
1125	int nr = sensor_attr->index;
1126	struct it87_data *data = dev_get_drvdata(dev);
1127	long val;
1128
1129	if (strict_strtol(buf, 10, &val) < 0)
1130		return -EINVAL;
1131
1132	mutex_lock(&data->update_lock);
1133	data->fan_min[nr] = FAN16_TO_REG(val);
1134	it87_write_value(data, IT87_REG_FAN_MIN[nr],
1135			 data->fan_min[nr] & 0xff);
1136	it87_write_value(data, IT87_REG_FANX_MIN[nr],
1137			 data->fan_min[nr] >> 8);
1138	mutex_unlock(&data->update_lock);
1139	return count;
1140}
1141
1142/* We want to use the same sysfs file names as 8-bit fans, but we need
1143   different variable names, so we have to use SENSOR_ATTR instead of
1144   SENSOR_DEVICE_ATTR. */
 
 
1145#define show_fan16_offset(offset) \
1146static struct sensor_device_attribute sensor_dev_attr_fan##offset##_input16 \
1147	= SENSOR_ATTR(fan##offset##_input, S_IRUGO,		\
1148		show_fan16, NULL, offset - 1);			\
1149static struct sensor_device_attribute sensor_dev_attr_fan##offset##_min16 \
1150	= SENSOR_ATTR(fan##offset##_min, S_IRUGO | S_IWUSR,	\
1151		show_fan16_min, set_fan16_min, offset - 1)
1152
1153show_fan16_offset(1);
1154show_fan16_offset(2);
1155show_fan16_offset(3);
1156show_fan16_offset(4);
1157show_fan16_offset(5);
1158
1159/* Alarms */
1160static ssize_t show_alarms(struct device *dev, struct device_attribute *attr,
1161		char *buf)
1162{
1163	struct it87_data *data = it87_update_device(dev);
1164	return sprintf(buf, "%u\n", data->alarms);
1165}
1166static DEVICE_ATTR(alarms, S_IRUGO, show_alarms, NULL);
1167
1168static ssize_t show_alarm(struct device *dev, struct device_attribute *attr,
1169		char *buf)
1170{
1171	int bitnr = to_sensor_dev_attr(attr)->index;
1172	struct it87_data *data = it87_update_device(dev);
1173	return sprintf(buf, "%u\n", (data->alarms >> bitnr) & 1);
1174}
1175
1176static ssize_t clear_intrusion(struct device *dev, struct device_attribute
1177		*attr, const char *buf, size_t count)
1178{
1179	struct it87_data *data = dev_get_drvdata(dev);
1180	long val;
1181	int config;
1182
1183	if (strict_strtol(buf, 10, &val) < 0 || val != 0)
1184		return -EINVAL;
1185
1186	mutex_lock(&data->update_lock);
1187	config = it87_read_value(data, IT87_REG_CONFIG);
1188	if (config < 0) {
1189		count = config;
1190	} else {
1191		config |= 1 << 5;
1192		it87_write_value(data, IT87_REG_CONFIG, config);
1193		/* Invalidate cache to force re-read */
1194		data->valid = 0;
1195	}
1196	mutex_unlock(&data->update_lock);
1197
1198	return count;
1199}
1200
1201static SENSOR_DEVICE_ATTR(in0_alarm, S_IRUGO, show_alarm, NULL, 8);
1202static SENSOR_DEVICE_ATTR(in1_alarm, S_IRUGO, show_alarm, NULL, 9);
1203static SENSOR_DEVICE_ATTR(in2_alarm, S_IRUGO, show_alarm, NULL, 10);
1204static SENSOR_DEVICE_ATTR(in3_alarm, S_IRUGO, show_alarm, NULL, 11);
1205static SENSOR_DEVICE_ATTR(in4_alarm, S_IRUGO, show_alarm, NULL, 12);
1206static SENSOR_DEVICE_ATTR(in5_alarm, S_IRUGO, show_alarm, NULL, 13);
1207static SENSOR_DEVICE_ATTR(in6_alarm, S_IRUGO, show_alarm, NULL, 14);
1208static SENSOR_DEVICE_ATTR(in7_alarm, S_IRUGO, show_alarm, NULL, 15);
1209static SENSOR_DEVICE_ATTR(fan1_alarm, S_IRUGO, show_alarm, NULL, 0);
1210static SENSOR_DEVICE_ATTR(fan2_alarm, S_IRUGO, show_alarm, NULL, 1);
1211static SENSOR_DEVICE_ATTR(fan3_alarm, S_IRUGO, show_alarm, NULL, 2);
1212static SENSOR_DEVICE_ATTR(fan4_alarm, S_IRUGO, show_alarm, NULL, 3);
1213static SENSOR_DEVICE_ATTR(fan5_alarm, S_IRUGO, show_alarm, NULL, 6);
1214static SENSOR_DEVICE_ATTR(temp1_alarm, S_IRUGO, show_alarm, NULL, 16);
1215static SENSOR_DEVICE_ATTR(temp2_alarm, S_IRUGO, show_alarm, NULL, 17);
1216static SENSOR_DEVICE_ATTR(temp3_alarm, S_IRUGO, show_alarm, NULL, 18);
1217static SENSOR_DEVICE_ATTR(intrusion0_alarm, S_IRUGO | S_IWUSR,
1218			  show_alarm, clear_intrusion, 4);
1219
1220static ssize_t show_beep(struct device *dev, struct device_attribute *attr,
1221		char *buf)
1222{
1223	int bitnr = to_sensor_dev_attr(attr)->index;
1224	struct it87_data *data = it87_update_device(dev);
1225	return sprintf(buf, "%u\n", (data->beeps >> bitnr) & 1);
1226}
1227static ssize_t set_beep(struct device *dev, struct device_attribute *attr,
1228		const char *buf, size_t count)
1229{
1230	int bitnr = to_sensor_dev_attr(attr)->index;
1231	struct it87_data *data = dev_get_drvdata(dev);
1232	long val;
1233
1234	if (strict_strtol(buf, 10, &val) < 0
1235	 || (val != 0 && val != 1))
1236		return -EINVAL;
1237
1238	mutex_lock(&data->update_lock);
1239	data->beeps = it87_read_value(data, IT87_REG_BEEP_ENABLE);
1240	if (val)
1241		data->beeps |= (1 << bitnr);
1242	else
1243		data->beeps &= ~(1 << bitnr);
1244	it87_write_value(data, IT87_REG_BEEP_ENABLE, data->beeps);
1245	mutex_unlock(&data->update_lock);
1246	return count;
1247}
1248
1249static SENSOR_DEVICE_ATTR(in0_beep, S_IRUGO | S_IWUSR,
1250			  show_beep, set_beep, 1);
1251static SENSOR_DEVICE_ATTR(in1_beep, S_IRUGO, show_beep, NULL, 1);
1252static SENSOR_DEVICE_ATTR(in2_beep, S_IRUGO, show_beep, NULL, 1);
1253static SENSOR_DEVICE_ATTR(in3_beep, S_IRUGO, show_beep, NULL, 1);
1254static SENSOR_DEVICE_ATTR(in4_beep, S_IRUGO, show_beep, NULL, 1);
1255static SENSOR_DEVICE_ATTR(in5_beep, S_IRUGO, show_beep, NULL, 1);
1256static SENSOR_DEVICE_ATTR(in6_beep, S_IRUGO, show_beep, NULL, 1);
1257static SENSOR_DEVICE_ATTR(in7_beep, S_IRUGO, show_beep, NULL, 1);
1258/* fanX_beep writability is set later */
1259static SENSOR_DEVICE_ATTR(fan1_beep, S_IRUGO, show_beep, set_beep, 0);
1260static SENSOR_DEVICE_ATTR(fan2_beep, S_IRUGO, show_beep, set_beep, 0);
1261static SENSOR_DEVICE_ATTR(fan3_beep, S_IRUGO, show_beep, set_beep, 0);
1262static SENSOR_DEVICE_ATTR(fan4_beep, S_IRUGO, show_beep, set_beep, 0);
1263static SENSOR_DEVICE_ATTR(fan5_beep, S_IRUGO, show_beep, set_beep, 0);
1264static SENSOR_DEVICE_ATTR(temp1_beep, S_IRUGO | S_IWUSR,
1265			  show_beep, set_beep, 2);
1266static SENSOR_DEVICE_ATTR(temp2_beep, S_IRUGO, show_beep, NULL, 2);
1267static SENSOR_DEVICE_ATTR(temp3_beep, S_IRUGO, show_beep, NULL, 2);
1268
1269static ssize_t show_vrm_reg(struct device *dev, struct device_attribute *attr,
1270		char *buf)
1271{
1272	struct it87_data *data = dev_get_drvdata(dev);
1273	return sprintf(buf, "%u\n", data->vrm);
1274}
1275static ssize_t store_vrm_reg(struct device *dev, struct device_attribute *attr,
1276		const char *buf, size_t count)
1277{
1278	struct it87_data *data = dev_get_drvdata(dev);
1279	unsigned long val;
1280
1281	if (strict_strtoul(buf, 10, &val) < 0)
1282		return -EINVAL;
1283
1284	data->vrm = val;
1285
1286	return count;
1287}
1288static DEVICE_ATTR(vrm, S_IRUGO | S_IWUSR, show_vrm_reg, store_vrm_reg);
1289
1290static ssize_t show_vid_reg(struct device *dev, struct device_attribute *attr,
1291		char *buf)
1292{
1293	struct it87_data *data = it87_update_device(dev);
1294	return sprintf(buf, "%ld\n", (long) vid_from_reg(data->vid, data->vrm));
1295}
1296static DEVICE_ATTR(cpu0_vid, S_IRUGO, show_vid_reg, NULL);
1297
1298static ssize_t show_label(struct device *dev, struct device_attribute *attr,
1299		char *buf)
1300{
1301	static const char *labels[] = {
1302		"+5V",
1303		"5VSB",
1304		"Vbat",
1305	};
1306	static const char *labels_it8721[] = {
1307		"+3.3V",
1308		"3VSB",
1309		"Vbat",
1310	};
1311	struct it87_data *data = dev_get_drvdata(dev);
1312	int nr = to_sensor_dev_attr(attr)->index;
1313
1314	return sprintf(buf, "%s\n", data->type == it8721 ? labels_it8721[nr]
1315							 : labels[nr]);
1316}
1317static SENSOR_DEVICE_ATTR(in3_label, S_IRUGO, show_label, NULL, 0);
1318static SENSOR_DEVICE_ATTR(in7_label, S_IRUGO, show_label, NULL, 1);
1319static SENSOR_DEVICE_ATTR(in8_label, S_IRUGO, show_label, NULL, 2);
1320
1321static ssize_t show_name(struct device *dev, struct device_attribute
1322			 *devattr, char *buf)
1323{
1324	struct it87_data *data = dev_get_drvdata(dev);
1325	return sprintf(buf, "%s\n", data->name);
1326}
1327static DEVICE_ATTR(name, S_IRUGO, show_name, NULL);
1328
1329static struct attribute *it87_attributes[] = {
 
1330	&sensor_dev_attr_in0_input.dev_attr.attr,
1331	&sensor_dev_attr_in1_input.dev_attr.attr,
1332	&sensor_dev_attr_in2_input.dev_attr.attr,
1333	&sensor_dev_attr_in3_input.dev_attr.attr,
1334	&sensor_dev_attr_in4_input.dev_attr.attr,
1335	&sensor_dev_attr_in5_input.dev_attr.attr,
1336	&sensor_dev_attr_in6_input.dev_attr.attr,
1337	&sensor_dev_attr_in7_input.dev_attr.attr,
1338	&sensor_dev_attr_in8_input.dev_attr.attr,
1339	&sensor_dev_attr_in0_min.dev_attr.attr,
1340	&sensor_dev_attr_in1_min.dev_attr.attr,
1341	&sensor_dev_attr_in2_min.dev_attr.attr,
1342	&sensor_dev_attr_in3_min.dev_attr.attr,
1343	&sensor_dev_attr_in4_min.dev_attr.attr,
1344	&sensor_dev_attr_in5_min.dev_attr.attr,
1345	&sensor_dev_attr_in6_min.dev_attr.attr,
1346	&sensor_dev_attr_in7_min.dev_attr.attr,
1347	&sensor_dev_attr_in0_max.dev_attr.attr,
1348	&sensor_dev_attr_in1_max.dev_attr.attr,
1349	&sensor_dev_attr_in2_max.dev_attr.attr,
1350	&sensor_dev_attr_in3_max.dev_attr.attr,
1351	&sensor_dev_attr_in4_max.dev_attr.attr,
1352	&sensor_dev_attr_in5_max.dev_attr.attr,
1353	&sensor_dev_attr_in6_max.dev_attr.attr,
1354	&sensor_dev_attr_in7_max.dev_attr.attr,
1355	&sensor_dev_attr_in0_alarm.dev_attr.attr,
 
 
 
 
 
1356	&sensor_dev_attr_in1_alarm.dev_attr.attr,
 
 
 
 
 
1357	&sensor_dev_attr_in2_alarm.dev_attr.attr,
 
 
 
 
 
1358	&sensor_dev_attr_in3_alarm.dev_attr.attr,
 
 
 
 
 
1359	&sensor_dev_attr_in4_alarm.dev_attr.attr,
 
 
 
 
 
1360	&sensor_dev_attr_in5_alarm.dev_attr.attr,
 
 
 
 
 
1361	&sensor_dev_attr_in6_alarm.dev_attr.attr,
 
 
 
 
 
1362	&sensor_dev_attr_in7_alarm.dev_attr.attr,
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
1363
 
 
1364	&sensor_dev_attr_temp1_input.dev_attr.attr,
1365	&sensor_dev_attr_temp2_input.dev_attr.attr,
1366	&sensor_dev_attr_temp3_input.dev_attr.attr,
1367	&sensor_dev_attr_temp1_max.dev_attr.attr,
1368	&sensor_dev_attr_temp2_max.dev_attr.attr,
1369	&sensor_dev_attr_temp3_max.dev_attr.attr,
1370	&sensor_dev_attr_temp1_min.dev_attr.attr,
1371	&sensor_dev_attr_temp2_min.dev_attr.attr,
1372	&sensor_dev_attr_temp3_min.dev_attr.attr,
1373	&sensor_dev_attr_temp1_type.dev_attr.attr,
1374	&sensor_dev_attr_temp2_type.dev_attr.attr,
1375	&sensor_dev_attr_temp3_type.dev_attr.attr,
1376	&sensor_dev_attr_temp1_alarm.dev_attr.attr,
 
 
 
 
 
 
1377	&sensor_dev_attr_temp2_alarm.dev_attr.attr,
 
 
 
 
 
 
1378	&sensor_dev_attr_temp3_alarm.dev_attr.attr,
 
 
 
 
 
 
 
 
1379
 
1380	&dev_attr_alarms.attr,
1381	&sensor_dev_attr_intrusion0_alarm.dev_attr.attr,
1382	&dev_attr_name.attr,
1383	NULL
1384};
1385
1386static const struct attribute_group it87_group = {
1387	.attrs = it87_attributes,
1388};
1389
1390static struct attribute *it87_attributes_beep[] = {
1391	&sensor_dev_attr_in0_beep.dev_attr.attr,
1392	&sensor_dev_attr_in1_beep.dev_attr.attr,
1393	&sensor_dev_attr_in2_beep.dev_attr.attr,
1394	&sensor_dev_attr_in3_beep.dev_attr.attr,
1395	&sensor_dev_attr_in4_beep.dev_attr.attr,
1396	&sensor_dev_attr_in5_beep.dev_attr.attr,
1397	&sensor_dev_attr_in6_beep.dev_attr.attr,
1398	&sensor_dev_attr_in7_beep.dev_attr.attr,
 
 
1399
 
1400	&sensor_dev_attr_temp1_beep.dev_attr.attr,
1401	&sensor_dev_attr_temp2_beep.dev_attr.attr,
1402	&sensor_dev_attr_temp3_beep.dev_attr.attr,
1403	NULL
1404};
1405
1406static const struct attribute_group it87_group_beep = {
1407	.attrs = it87_attributes_beep,
1408};
1409
1410static struct attribute *it87_attributes_fan16[5][3+1] = { {
1411	&sensor_dev_attr_fan1_input16.dev_attr.attr,
1412	&sensor_dev_attr_fan1_min16.dev_attr.attr,
1413	&sensor_dev_attr_fan1_alarm.dev_attr.attr,
1414	NULL
1415}, {
1416	&sensor_dev_attr_fan2_input16.dev_attr.attr,
1417	&sensor_dev_attr_fan2_min16.dev_attr.attr,
1418	&sensor_dev_attr_fan2_alarm.dev_attr.attr,
1419	NULL
1420}, {
1421	&sensor_dev_attr_fan3_input16.dev_attr.attr,
1422	&sensor_dev_attr_fan3_min16.dev_attr.attr,
1423	&sensor_dev_attr_fan3_alarm.dev_attr.attr,
1424	NULL
1425}, {
1426	&sensor_dev_attr_fan4_input16.dev_attr.attr,
1427	&sensor_dev_attr_fan4_min16.dev_attr.attr,
1428	&sensor_dev_attr_fan4_alarm.dev_attr.attr,
1429	NULL
1430}, {
1431	&sensor_dev_attr_fan5_input16.dev_attr.attr,
1432	&sensor_dev_attr_fan5_min16.dev_attr.attr,
1433	&sensor_dev_attr_fan5_alarm.dev_attr.attr,
1434	NULL
1435} };
1436
1437static const struct attribute_group it87_group_fan16[5] = {
1438	{ .attrs = it87_attributes_fan16[0] },
1439	{ .attrs = it87_attributes_fan16[1] },
1440	{ .attrs = it87_attributes_fan16[2] },
1441	{ .attrs = it87_attributes_fan16[3] },
1442	{ .attrs = it87_attributes_fan16[4] },
1443};
1444
1445static struct attribute *it87_attributes_fan[3][4+1] = { {
1446	&sensor_dev_attr_fan1_input.dev_attr.attr,
1447	&sensor_dev_attr_fan1_min.dev_attr.attr,
1448	&sensor_dev_attr_fan1_div.dev_attr.attr,
1449	&sensor_dev_attr_fan1_alarm.dev_attr.attr,
1450	NULL
1451}, {
1452	&sensor_dev_attr_fan2_input.dev_attr.attr,
1453	&sensor_dev_attr_fan2_min.dev_attr.attr,
1454	&sensor_dev_attr_fan2_div.dev_attr.attr,
1455	&sensor_dev_attr_fan2_alarm.dev_attr.attr,
1456	NULL
1457}, {
1458	&sensor_dev_attr_fan3_input.dev_attr.attr,
1459	&sensor_dev_attr_fan3_min.dev_attr.attr,
1460	&sensor_dev_attr_fan3_div.dev_attr.attr,
1461	&sensor_dev_attr_fan3_alarm.dev_attr.attr,
1462	NULL
1463} };
1464
1465static const struct attribute_group it87_group_fan[3] = {
1466	{ .attrs = it87_attributes_fan[0] },
1467	{ .attrs = it87_attributes_fan[1] },
1468	{ .attrs = it87_attributes_fan[2] },
1469};
1470
1471static const struct attribute_group *
1472it87_get_fan_group(const struct it87_data *data)
1473{
1474	return has_16bit_fans(data) ? it87_group_fan16 : it87_group_fan;
1475}
1476
1477static struct attribute *it87_attributes_pwm[3][4+1] = { {
1478	&sensor_dev_attr_pwm1_enable.dev_attr.attr,
1479	&sensor_dev_attr_pwm1.dev_attr.attr,
1480	&dev_attr_pwm1_freq.attr,
1481	&sensor_dev_attr_pwm1_auto_channels_temp.dev_attr.attr,
1482	NULL
1483}, {
1484	&sensor_dev_attr_pwm2_enable.dev_attr.attr,
1485	&sensor_dev_attr_pwm2.dev_attr.attr,
1486	&dev_attr_pwm2_freq.attr,
1487	&sensor_dev_attr_pwm2_auto_channels_temp.dev_attr.attr,
1488	NULL
1489}, {
1490	&sensor_dev_attr_pwm3_enable.dev_attr.attr,
1491	&sensor_dev_attr_pwm3.dev_attr.attr,
1492	&dev_attr_pwm3_freq.attr,
1493	&sensor_dev_attr_pwm3_auto_channels_temp.dev_attr.attr,
1494	NULL
1495} };
1496
1497static const struct attribute_group it87_group_pwm[3] = {
1498	{ .attrs = it87_attributes_pwm[0] },
1499	{ .attrs = it87_attributes_pwm[1] },
1500	{ .attrs = it87_attributes_pwm[2] },
1501};
1502
1503static struct attribute *it87_attributes_autopwm[3][9+1] = { {
1504	&sensor_dev_attr_pwm1_auto_point1_pwm.dev_attr.attr,
1505	&sensor_dev_attr_pwm1_auto_point2_pwm.dev_attr.attr,
1506	&sensor_dev_attr_pwm1_auto_point3_pwm.dev_attr.attr,
1507	&sensor_dev_attr_pwm1_auto_point4_pwm.dev_attr.attr,
1508	&sensor_dev_attr_pwm1_auto_point1_temp.dev_attr.attr,
1509	&sensor_dev_attr_pwm1_auto_point1_temp_hyst.dev_attr.attr,
1510	&sensor_dev_attr_pwm1_auto_point2_temp.dev_attr.attr,
1511	&sensor_dev_attr_pwm1_auto_point3_temp.dev_attr.attr,
1512	&sensor_dev_attr_pwm1_auto_point4_temp.dev_attr.attr,
1513	NULL
1514}, {
1515	&sensor_dev_attr_pwm2_auto_point1_pwm.dev_attr.attr,
1516	&sensor_dev_attr_pwm2_auto_point2_pwm.dev_attr.attr,
1517	&sensor_dev_attr_pwm2_auto_point3_pwm.dev_attr.attr,
1518	&sensor_dev_attr_pwm2_auto_point4_pwm.dev_attr.attr,
1519	&sensor_dev_attr_pwm2_auto_point1_temp.dev_attr.attr,
1520	&sensor_dev_attr_pwm2_auto_point1_temp_hyst.dev_attr.attr,
1521	&sensor_dev_attr_pwm2_auto_point2_temp.dev_attr.attr,
1522	&sensor_dev_attr_pwm2_auto_point3_temp.dev_attr.attr,
1523	&sensor_dev_attr_pwm2_auto_point4_temp.dev_attr.attr,
1524	NULL
1525}, {
1526	&sensor_dev_attr_pwm3_auto_point1_pwm.dev_attr.attr,
1527	&sensor_dev_attr_pwm3_auto_point2_pwm.dev_attr.attr,
1528	&sensor_dev_attr_pwm3_auto_point3_pwm.dev_attr.attr,
1529	&sensor_dev_attr_pwm3_auto_point4_pwm.dev_attr.attr,
1530	&sensor_dev_attr_pwm3_auto_point1_temp.dev_attr.attr,
1531	&sensor_dev_attr_pwm3_auto_point1_temp_hyst.dev_attr.attr,
1532	&sensor_dev_attr_pwm3_auto_point2_temp.dev_attr.attr,
1533	&sensor_dev_attr_pwm3_auto_point3_temp.dev_attr.attr,
1534	&sensor_dev_attr_pwm3_auto_point4_temp.dev_attr.attr,
1535	NULL
1536} };
1537
1538static const struct attribute_group it87_group_autopwm[3] = {
1539	{ .attrs = it87_attributes_autopwm[0] },
1540	{ .attrs = it87_attributes_autopwm[1] },
1541	{ .attrs = it87_attributes_autopwm[2] },
1542};
1543
1544static struct attribute *it87_attributes_fan_beep[] = {
1545	&sensor_dev_attr_fan1_beep.dev_attr.attr,
1546	&sensor_dev_attr_fan2_beep.dev_attr.attr,
1547	&sensor_dev_attr_fan3_beep.dev_attr.attr,
1548	&sensor_dev_attr_fan4_beep.dev_attr.attr,
1549	&sensor_dev_attr_fan5_beep.dev_attr.attr,
1550};
1551
1552static struct attribute *it87_attributes_vid[] = {
1553	&dev_attr_vrm.attr,
1554	&dev_attr_cpu0_vid.attr,
1555	NULL
1556};
1557
1558static const struct attribute_group it87_group_vid = {
1559	.attrs = it87_attributes_vid,
1560};
1561
1562static struct attribute *it87_attributes_label[] = {
1563	&sensor_dev_attr_in3_label.dev_attr.attr,
1564	&sensor_dev_attr_in7_label.dev_attr.attr,
1565	&sensor_dev_attr_in8_label.dev_attr.attr,
1566	NULL
1567};
1568
1569static const struct attribute_group it87_group_label = {
1570	.attrs = it87_attributes_label,
1571};
1572
1573/* SuperIO detection - will change isa_address if a chip is found */
1574static int __init it87_find(unsigned short *address,
1575	struct it87_sio_data *sio_data)
1576{
1577	int err;
1578	u16 chip_type;
1579	const char *board_vendor, *board_name;
1580
1581	err = superio_enter();
1582	if (err)
1583		return err;
1584
1585	err = -ENODEV;
1586	chip_type = force_id ? force_id : superio_inw(DEVID);
1587
1588	switch (chip_type) {
1589	case IT8705F_DEVID:
1590		sio_data->type = it87;
1591		break;
1592	case IT8712F_DEVID:
1593		sio_data->type = it8712;
1594		break;
1595	case IT8716F_DEVID:
1596	case IT8726F_DEVID:
1597		sio_data->type = it8716;
1598		break;
1599	case IT8718F_DEVID:
1600		sio_data->type = it8718;
1601		break;
1602	case IT8720F_DEVID:
1603		sio_data->type = it8720;
1604		break;
1605	case IT8721F_DEVID:
1606		sio_data->type = it8721;
1607		break;
 
 
 
 
 
 
 
 
 
1608	case 0xffff:	/* No device at all */
1609		goto exit;
1610	default:
1611		pr_debug("Unsupported chip (DEVID=0x%x)\n", chip_type);
1612		goto exit;
1613	}
1614
1615	superio_select(PME);
1616	if (!(superio_inb(IT87_ACT_REG) & 0x01)) {
1617		pr_info("Device not activated, skipping\n");
1618		goto exit;
1619	}
1620
1621	*address = superio_inw(IT87_BASE_REG) & ~(IT87_EXTENT - 1);
1622	if (*address == 0) {
1623		pr_info("Base address not set, skipping\n");
1624		goto exit;
1625	}
1626
1627	err = 0;
1628	sio_data->revision = superio_inb(DEVREV) & 0x0f;
1629	pr_info("Found IT%04xF chip at 0x%x, revision %d\n",
1630		chip_type, *address, sio_data->revision);
1631
1632	/* in8 (Vbat) is always internal */
1633	sio_data->internal = (1 << 2);
1634
1635	/* Read GPIO config and VID value from LDN 7 (GPIO) */
1636	if (sio_data->type == it87) {
1637		/* The IT8705F doesn't have VID pins at all */
1638		sio_data->skip_vid = 1;
1639
1640		/* The IT8705F has a different LD number for GPIO */
1641		superio_select(5);
1642		sio_data->beep_pin = superio_inb(IT87_SIO_BEEP_PIN_REG) & 0x3f;
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
1643	} else {
1644		int reg;
 
1645
1646		superio_select(GPIO);
1647
1648		reg = superio_inb(IT87_SIO_GPIO3_REG);
1649		if (sio_data->type == it8721) {
1650			/* The IT8721F/IT8758E doesn't have VID pins at all */
 
 
 
 
1651			sio_data->skip_vid = 1;
1652		} else {
1653			/* We need at least 4 VID pins */
1654			if (reg & 0x0f) {
1655				pr_info("VID is disabled (pins used for GPIO)\n");
1656				sio_data->skip_vid = 1;
1657			}
1658		}
1659
1660		/* Check if fan3 is there or not */
1661		if (reg & (1 << 6))
1662			sio_data->skip_pwm |= (1 << 2);
1663		if (reg & (1 << 7))
1664			sio_data->skip_fan |= (1 << 2);
1665
1666		/* Check if fan2 is there or not */
1667		reg = superio_inb(IT87_SIO_GPIO5_REG);
1668		if (reg & (1 << 1))
1669			sio_data->skip_pwm |= (1 << 1);
1670		if (reg & (1 << 2))
1671			sio_data->skip_fan |= (1 << 1);
1672
1673		if ((sio_data->type == it8718 || sio_data->type == it8720)
1674		 && !(sio_data->skip_vid))
1675			sio_data->vid_value = superio_inb(IT87_SIO_VID_REG);
1676
1677		reg = superio_inb(IT87_SIO_PINX2_REG);
 
 
 
1678		/*
1679		 * The IT8720F has no VIN7 pin, so VCCH should always be
1680		 * routed internally to VIN7 with an internal divider.
1681		 * Curiously, there still is a configuration bit to control
1682		 * this, which means it can be set incorrectly. And even
1683		 * more curiously, many boards out there are improperly
1684		 * configured, even though the IT8720F datasheet claims
1685		 * that the internal routing of VCCH to VIN7 is the default
1686		 * setting. So we force the internal routing in this case.
 
 
 
 
1687		 */
1688		if (sio_data->type == it8720 && !(reg & (1 << 1))) {
1689			reg |= (1 << 1);
1690			superio_outb(IT87_SIO_PINX2_REG, reg);
1691			pr_notice("Routing internal VCCH to in7\n");
1692		}
1693		if (reg & (1 << 0))
1694			sio_data->internal |= (1 << 0);
1695		if ((reg & (1 << 1)) || sio_data->type == it8721)
 
1696			sio_data->internal |= (1 << 1);
1697
 
 
 
 
 
 
 
 
 
 
 
 
 
 
1698		sio_data->beep_pin = superio_inb(IT87_SIO_BEEP_PIN_REG) & 0x3f;
1699	}
1700	if (sio_data->beep_pin)
1701		pr_info("Beeping is supported\n");
1702
1703	/* Disable specific features based on DMI strings */
1704	board_vendor = dmi_get_system_info(DMI_BOARD_VENDOR);
1705	board_name = dmi_get_system_info(DMI_BOARD_NAME);
1706	if (board_vendor && board_name) {
1707		if (strcmp(board_vendor, "nVIDIA") == 0
1708		 && strcmp(board_name, "FN68PT") == 0) {
1709			/* On the Shuttle SN68PT, FAN_CTL2 is apparently not
1710			   connected to a fan, but to something else. One user
1711			   has reported instant system power-off when changing
1712			   the PWM2 duty cycle, so we disable it.
1713			   I use the board name string as the trigger in case
1714			   the same board is ever used in other systems. */
 
 
1715			pr_info("Disabling pwm2 due to hardware constraints\n");
1716			sio_data->skip_pwm = (1 << 1);
1717		}
1718	}
1719
1720exit:
1721	superio_exit();
1722	return err;
1723}
1724
1725static void it87_remove_files(struct device *dev)
1726{
1727	struct it87_data *data = platform_get_drvdata(pdev);
1728	struct it87_sio_data *sio_data = dev->platform_data;
1729	const struct attribute_group *fan_group = it87_get_fan_group(data);
1730	int i;
1731
1732	sysfs_remove_group(&dev->kobj, &it87_group);
1733	if (sio_data->beep_pin)
1734		sysfs_remove_group(&dev->kobj, &it87_group_beep);
 
 
 
 
 
 
 
 
 
 
 
 
 
 
1735	for (i = 0; i < 5; i++) {
1736		if (!(data->has_fan & (1 << i)))
1737			continue;
1738		sysfs_remove_group(&dev->kobj, &fan_group[i]);
1739		if (sio_data->beep_pin)
1740			sysfs_remove_file(&dev->kobj,
1741					  it87_attributes_fan_beep[i]);
1742	}
1743	for (i = 0; i < 3; i++) {
1744		if (sio_data->skip_pwm & (1 << 0))
1745			continue;
1746		sysfs_remove_group(&dev->kobj, &it87_group_pwm[i]);
1747		if (has_old_autopwm(data))
1748			sysfs_remove_group(&dev->kobj,
1749					   &it87_group_autopwm[i]);
1750	}
1751	if (!sio_data->skip_vid)
1752		sysfs_remove_group(&dev->kobj, &it87_group_vid);
1753	sysfs_remove_group(&dev->kobj, &it87_group_label);
1754}
1755
1756static int __devinit it87_probe(struct platform_device *pdev)
1757{
1758	struct it87_data *data;
1759	struct resource *res;
1760	struct device *dev = &pdev->dev;
1761	struct it87_sio_data *sio_data = dev->platform_data;
1762	const struct attribute_group *fan_group;
1763	int err = 0, i;
1764	int enable_pwm_interface;
1765	int fan_beep_need_rw;
1766	static const char *names[] = {
1767		"it87",
1768		"it8712",
1769		"it8716",
1770		"it8718",
1771		"it8720",
1772		"it8721",
 
 
 
1773	};
1774
1775	res = platform_get_resource(pdev, IORESOURCE_IO, 0);
1776	if (!request_region(res->start, IT87_EC_EXTENT, DRVNAME)) {
 
1777		dev_err(dev, "Failed to request region 0x%lx-0x%lx\n",
1778			(unsigned long)res->start,
1779			(unsigned long)(res->start + IT87_EC_EXTENT - 1));
1780		err = -EBUSY;
1781		goto ERROR0;
1782	}
1783
1784	data = kzalloc(sizeof(struct it87_data), GFP_KERNEL);
1785	if (!data) {
1786		err = -ENOMEM;
1787		goto ERROR1;
1788	}
1789
1790	data->addr = res->start;
1791	data->type = sio_data->type;
1792	data->revision = sio_data->revision;
1793	data->name = names[sio_data->type];
1794
1795	/* Now, we do the remaining detection. */
1796	if ((it87_read_value(data, IT87_REG_CONFIG) & 0x80)
1797	 || it87_read_value(data, IT87_REG_CHIPID) != 0x90) {
1798		err = -ENODEV;
1799		goto ERROR2;
1800	}
1801
1802	platform_set_drvdata(pdev, data);
1803
1804	mutex_init(&data->update_lock);
1805
1806	/* Check PWM configuration */
1807	enable_pwm_interface = it87_check_pwm(dev);
1808
1809	/* Starting with IT8721F, we handle scaling of internal voltages */
1810	if (data->type == it8721) {
1811		if (sio_data->internal & (1 << 0))
1812			data->in_scaled |= (1 << 3);	/* in3 is AVCC */
1813		if (sio_data->internal & (1 << 1))
1814			data->in_scaled |= (1 << 7);	/* in7 is VSB */
1815		if (sio_data->internal & (1 << 2))
1816			data->in_scaled |= (1 << 8);	/* in8 is Vbat */
 
 
 
 
 
 
 
 
 
 
 
 
1817	}
1818
1819	/* Initialize the IT87 chip */
1820	it87_init_device(pdev);
1821
1822	/* Register sysfs hooks */
1823	err = sysfs_create_group(&dev->kobj, &it87_group);
1824	if (err)
1825		goto ERROR2;
1826
1827	if (sio_data->beep_pin) {
1828		err = sysfs_create_group(&dev->kobj, &it87_group_beep);
 
 
1829		if (err)
1830			goto ERROR4;
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
1831	}
1832
1833	/* Do not create fan files for disabled fans */
1834	fan_group = it87_get_fan_group(data);
1835	fan_beep_need_rw = 1;
1836	for (i = 0; i < 5; i++) {
1837		if (!(data->has_fan & (1 << i)))
1838			continue;
1839		err = sysfs_create_group(&dev->kobj, &fan_group[i]);
1840		if (err)
1841			goto ERROR4;
1842
1843		if (sio_data->beep_pin) {
1844			err = sysfs_create_file(&dev->kobj,
1845						it87_attributes_fan_beep[i]);
1846			if (err)
1847				goto ERROR4;
1848			if (!fan_beep_need_rw)
1849				continue;
1850
1851			/* As we have a single beep enable bit for all fans,
 
1852			 * only the first enabled fan has a writable attribute
1853			 * for it. */
 
1854			if (sysfs_chmod_file(&dev->kobj,
1855					     it87_attributes_fan_beep[i],
1856					     S_IRUGO | S_IWUSR))
1857				dev_dbg(dev, "chmod +w fan%d_beep failed\n",
1858					i + 1);
1859			fan_beep_need_rw = 0;
1860		}
1861	}
1862
1863	if (enable_pwm_interface) {
1864		for (i = 0; i < 3; i++) {
1865			if (sio_data->skip_pwm & (1 << i))
1866				continue;
1867			err = sysfs_create_group(&dev->kobj,
1868						 &it87_group_pwm[i]);
1869			if (err)
1870				goto ERROR4;
1871
1872			if (!has_old_autopwm(data))
1873				continue;
1874			err = sysfs_create_group(&dev->kobj,
1875						 &it87_group_autopwm[i]);
1876			if (err)
1877				goto ERROR4;
1878		}
1879	}
1880
1881	if (!sio_data->skip_vid) {
1882		data->vrm = vid_which_vrm();
1883		/* VID reading from Super-I/O config space if available */
1884		data->vid = sio_data->vid_value;
1885		err = sysfs_create_group(&dev->kobj, &it87_group_vid);
1886		if (err)
1887			goto ERROR4;
1888	}
1889
1890	/* Export labels for internal sensors */
1891	for (i = 0; i < 3; i++) {
1892		if (!(sio_data->internal & (1 << i)))
1893			continue;
1894		err = sysfs_create_file(&dev->kobj,
1895					it87_attributes_label[i]);
1896		if (err)
1897			goto ERROR4;
1898	}
1899
1900	data->hwmon_dev = hwmon_device_register(dev);
1901	if (IS_ERR(data->hwmon_dev)) {
1902		err = PTR_ERR(data->hwmon_dev);
1903		goto ERROR4;
1904	}
1905
1906	return 0;
1907
1908ERROR4:
1909	it87_remove_files(dev);
1910ERROR2:
1911	platform_set_drvdata(pdev, NULL);
1912	kfree(data);
1913ERROR1:
1914	release_region(res->start, IT87_EC_EXTENT);
1915ERROR0:
1916	return err;
1917}
1918
1919static int __devexit it87_remove(struct platform_device *pdev)
1920{
1921	struct it87_data *data = platform_get_drvdata(pdev);
1922
1923	hwmon_device_unregister(data->hwmon_dev);
1924	it87_remove_files(&pdev->dev);
1925
1926	release_region(data->addr, IT87_EC_EXTENT);
1927	platform_set_drvdata(pdev, NULL);
1928	kfree(data);
1929
1930	return 0;
1931}
1932
1933/* Must be called with data->update_lock held, except during initialization.
1934   We ignore the IT87 BUSY flag at this moment - it could lead to deadlocks,
1935   would slow down the IT87 access and should not be necessary. */
 
 
1936static int it87_read_value(struct it87_data *data, u8 reg)
1937{
1938	outb_p(reg, data->addr + IT87_ADDR_REG_OFFSET);
1939	return inb_p(data->addr + IT87_DATA_REG_OFFSET);
1940}
1941
1942/* Must be called with data->update_lock held, except during initialization.
1943   We ignore the IT87 BUSY flag at this moment - it could lead to deadlocks,
1944   would slow down the IT87 access and should not be necessary. */
 
 
1945static void it87_write_value(struct it87_data *data, u8 reg, u8 value)
1946{
1947	outb_p(reg, data->addr + IT87_ADDR_REG_OFFSET);
1948	outb_p(value, data->addr + IT87_DATA_REG_OFFSET);
1949}
1950
1951/* Return 1 if and only if the PWM interface is safe to use */
1952static int __devinit it87_check_pwm(struct device *dev)
1953{
1954	struct it87_data *data = dev_get_drvdata(dev);
1955	/* Some BIOSes fail to correctly configure the IT87 fans. All fans off
 
1956	 * and polarity set to active low is sign that this is the case so we
1957	 * disable pwm control to protect the user. */
 
1958	int tmp = it87_read_value(data, IT87_REG_FAN_CTL);
1959	if ((tmp & 0x87) == 0) {
1960		if (fix_pwm_polarity) {
1961			/* The user asks us to attempt a chip reconfiguration.
 
1962			 * This means switching to active high polarity and
1963			 * inverting all fan speed values. */
 
1964			int i;
1965			u8 pwm[3];
1966
1967			for (i = 0; i < 3; i++)
1968				pwm[i] = it87_read_value(data,
1969							 IT87_REG_PWM(i));
1970
1971			/* If any fan is in automatic pwm mode, the polarity
 
1972			 * might be correct, as suspicious as it seems, so we
1973			 * better don't change anything (but still disable the
1974			 * PWM interface). */
 
1975			if (!((pwm[0] | pwm[1] | pwm[2]) & 0x80)) {
1976				dev_info(dev, "Reconfiguring PWM to "
1977					 "active high polarity\n");
1978				it87_write_value(data, IT87_REG_FAN_CTL,
1979						 tmp | 0x87);
1980				for (i = 0; i < 3; i++)
1981					it87_write_value(data,
1982							 IT87_REG_PWM(i),
1983							 0x7f & ~pwm[i]);
1984				return 1;
1985			}
1986
1987			dev_info(dev, "PWM configuration is "
1988				 "too broken to be fixed\n");
1989		}
1990
1991		dev_info(dev, "Detected broken BIOS "
1992			 "defaults, disabling PWM interface\n");
1993		return 0;
1994	} else if (fix_pwm_polarity) {
1995		dev_info(dev, "PWM configuration looks "
1996			 "sane, won't touch\n");
1997	}
1998
1999	return 1;
2000}
2001
2002/* Called when we have found a new IT87. */
2003static void __devinit it87_init_device(struct platform_device *pdev)
2004{
2005	struct it87_sio_data *sio_data = pdev->dev.platform_data;
2006	struct it87_data *data = platform_get_drvdata(pdev);
2007	int tmp, i;
2008	u8 mask;
2009
2010	/* For each PWM channel:
 
2011	 * - If it is in automatic mode, setting to manual mode should set
2012	 *   the fan to full speed by default.
2013	 * - If it is in manual mode, we need a mapping to temperature
2014	 *   channels to use when later setting to automatic mode later.
2015	 *   Use a 1:1 mapping by default (we are clueless.)
2016	 * In both cases, the value can (and should) be changed by the user
2017	 * prior to switching to a different mode.
2018	 * Note that this is no longer needed for the IT8721F and later, as
2019	 * these have separate registers for the temperature mapping and the
2020	 * manual duty cycle. */
 
2021	for (i = 0; i < 3; i++) {
2022		data->pwm_temp_map[i] = i;
2023		data->pwm_duty[i] = 0x7f;	/* Full speed */
2024		data->auto_pwm[i][3] = 0x7f;	/* Full speed, hard-coded */
2025	}
2026
2027	/* Some chips seem to have default value 0xff for all limit
 
2028	 * registers. For low voltage limits it makes no sense and triggers
2029	 * alarms, so change to 0 instead. For high temperature limits, it
2030	 * means -1 degree C, which surprisingly doesn't trigger an alarm,
2031	 * but is still confusing, so change to 127 degrees C. */
 
2032	for (i = 0; i < 8; i++) {
2033		tmp = it87_read_value(data, IT87_REG_VIN_MIN(i));
2034		if (tmp == 0xff)
2035			it87_write_value(data, IT87_REG_VIN_MIN(i), 0);
2036	}
2037	for (i = 0; i < 3; i++) {
2038		tmp = it87_read_value(data, IT87_REG_TEMP_HIGH(i));
2039		if (tmp == 0xff)
2040			it87_write_value(data, IT87_REG_TEMP_HIGH(i), 127);
2041	}
2042
2043	/* Temperature channels are not forcibly enabled, as they can be
 
2044	 * set to two different sensor types and we can't guess which one
2045	 * is correct for a given system. These channels can be enabled at
2046	 * run-time through the temp{1-3}_type sysfs accessors if needed. */
 
2047
2048	/* Check if voltage monitors are reset manually or by some reason */
2049	tmp = it87_read_value(data, IT87_REG_VIN_ENABLE);
2050	if ((tmp & 0xff) == 0) {
2051		/* Enable all voltage monitors */
2052		it87_write_value(data, IT87_REG_VIN_ENABLE, 0xff);
2053	}
2054
2055	/* Check if tachometers are reset manually or by some reason */
2056	mask = 0x70 & ~(sio_data->skip_fan << 4);
2057	data->fan_main_ctrl = it87_read_value(data, IT87_REG_FAN_MAIN_CTRL);
2058	if ((data->fan_main_ctrl & mask) == 0) {
2059		/* Enable all fan tachometers */
2060		data->fan_main_ctrl |= mask;
2061		it87_write_value(data, IT87_REG_FAN_MAIN_CTRL,
2062				 data->fan_main_ctrl);
2063	}
2064	data->has_fan = (data->fan_main_ctrl >> 4) & 0x07;
2065
2066	/* Set tachometers to 16-bit mode if needed */
2067	if (has_16bit_fans(data)) {
2068		tmp = it87_read_value(data, IT87_REG_FAN_16BIT);
2069		if (~tmp & 0x07 & data->has_fan) {
2070			dev_dbg(&pdev->dev,
2071				"Setting fan1-3 to 16-bit mode\n");
2072			it87_write_value(data, IT87_REG_FAN_16BIT,
2073					 tmp | 0x07);
2074		}
2075		/* IT8705F only supports three fans. */
2076		if (data->type != it87) {
 
2077			if (tmp & (1 << 4))
2078				data->has_fan |= (1 << 3); /* fan4 enabled */
2079			if (tmp & (1 << 5))
2080				data->has_fan |= (1 << 4); /* fan5 enabled */
2081		}
2082	}
2083
2084	/* Fan input pins may be used for alternative functions */
2085	data->has_fan &= ~sio_data->skip_fan;
2086
2087	/* Start monitoring */
2088	it87_write_value(data, IT87_REG_CONFIG,
2089			 (it87_read_value(data, IT87_REG_CONFIG) & 0x36)
2090			 | (update_vbat ? 0x41 : 0x01));
2091}
2092
2093static void it87_update_pwm_ctrl(struct it87_data *data, int nr)
2094{
2095	data->pwm_ctrl[nr] = it87_read_value(data, IT87_REG_PWM(nr));
2096	if (data->type == it8721) {
2097		data->pwm_temp_map[nr] = data->pwm_ctrl[nr] & 0x03;
2098		data->pwm_duty[nr] = it87_read_value(data,
2099						     IT87_REG_PWM_DUTY(nr));
2100	} else {
2101		if (data->pwm_ctrl[nr] & 0x80)	/* Automatic mode */
2102			data->pwm_temp_map[nr] = data->pwm_ctrl[nr] & 0x03;
2103		else				/* Manual mode */
2104			data->pwm_duty[nr] = data->pwm_ctrl[nr] & 0x7f;
2105	}
2106
2107	if (has_old_autopwm(data)) {
2108		int i;
2109
2110		for (i = 0; i < 5 ; i++)
2111			data->auto_temp[nr][i] = it87_read_value(data,
2112						IT87_REG_AUTO_TEMP(nr, i));
2113		for (i = 0; i < 3 ; i++)
2114			data->auto_pwm[nr][i] = it87_read_value(data,
2115						IT87_REG_AUTO_PWM(nr, i));
2116	}
2117}
2118
2119static struct it87_data *it87_update_device(struct device *dev)
2120{
2121	struct it87_data *data = dev_get_drvdata(dev);
2122	int i;
2123
2124	mutex_lock(&data->update_lock);
2125
2126	if (time_after(jiffies, data->last_updated + HZ + HZ / 2)
2127	    || !data->valid) {
2128		if (update_vbat) {
2129			/* Cleared after each update, so reenable.  Value
2130			   returned by this read will be previous value */
 
 
2131			it87_write_value(data, IT87_REG_CONFIG,
2132				it87_read_value(data, IT87_REG_CONFIG) | 0x40);
2133		}
2134		for (i = 0; i <= 7; i++) {
2135			data->in[i] =
2136				it87_read_value(data, IT87_REG_VIN(i));
2137			data->in_min[i] =
2138				it87_read_value(data, IT87_REG_VIN_MIN(i));
2139			data->in_max[i] =
2140				it87_read_value(data, IT87_REG_VIN_MAX(i));
2141		}
2142		/* in8 (battery) has no limit registers */
2143		data->in[8] = it87_read_value(data, IT87_REG_VIN(8));
2144
2145		for (i = 0; i < 5; i++) {
2146			/* Skip disabled fans */
2147			if (!(data->has_fan & (1 << i)))
2148				continue;
2149
2150			data->fan_min[i] =
2151				it87_read_value(data, IT87_REG_FAN_MIN[i]);
2152			data->fan[i] = it87_read_value(data,
2153				       IT87_REG_FAN[i]);
2154			/* Add high byte if in 16-bit mode */
2155			if (has_16bit_fans(data)) {
2156				data->fan[i] |= it87_read_value(data,
2157						IT87_REG_FANX[i]) << 8;
2158				data->fan_min[i] |= it87_read_value(data,
2159						IT87_REG_FANX_MIN[i]) << 8;
2160			}
2161		}
2162		for (i = 0; i < 3; i++) {
 
 
2163			data->temp[i] =
2164				it87_read_value(data, IT87_REG_TEMP(i));
2165			data->temp_high[i] =
2166				it87_read_value(data, IT87_REG_TEMP_HIGH(i));
2167			data->temp_low[i] =
2168				it87_read_value(data, IT87_REG_TEMP_LOW(i));
2169		}
2170
2171		/* Newer chips don't have clock dividers */
2172		if ((data->has_fan & 0x07) && !has_16bit_fans(data)) {
2173			i = it87_read_value(data, IT87_REG_FAN_DIV);
2174			data->fan_div[0] = i & 0x07;
2175			data->fan_div[1] = (i >> 3) & 0x07;
2176			data->fan_div[2] = (i & 0x40) ? 3 : 1;
2177		}
2178
2179		data->alarms =
2180			it87_read_value(data, IT87_REG_ALARM1) |
2181			(it87_read_value(data, IT87_REG_ALARM2) << 8) |
2182			(it87_read_value(data, IT87_REG_ALARM3) << 16);
2183		data->beeps = it87_read_value(data, IT87_REG_BEEP_ENABLE);
2184
2185		data->fan_main_ctrl = it87_read_value(data,
2186				IT87_REG_FAN_MAIN_CTRL);
2187		data->fan_ctl = it87_read_value(data, IT87_REG_FAN_CTL);
2188		for (i = 0; i < 3; i++)
2189			it87_update_pwm_ctrl(data, i);
2190
2191		data->sensor = it87_read_value(data, IT87_REG_TEMP_ENABLE);
2192		/* The 8705 does not have VID capability.
2193		   The 8718 and later don't use IT87_REG_VID for the
2194		   same purpose. */
 
 
2195		if (data->type == it8712 || data->type == it8716) {
2196			data->vid = it87_read_value(data, IT87_REG_VID);
2197			/* The older IT8712F revisions had only 5 VID pins,
2198			   but we assume it is always safe to read 6 bits. */
 
 
2199			data->vid &= 0x3f;
2200		}
2201		data->last_updated = jiffies;
2202		data->valid = 1;
2203	}
2204
2205	mutex_unlock(&data->update_lock);
2206
2207	return data;
2208}
2209
2210static int __init it87_device_add(unsigned short address,
2211				  const struct it87_sio_data *sio_data)
2212{
2213	struct resource res = {
2214		.start	= address + IT87_EC_OFFSET,
2215		.end	= address + IT87_EC_OFFSET + IT87_EC_EXTENT - 1,
2216		.name	= DRVNAME,
2217		.flags	= IORESOURCE_IO,
2218	};
2219	int err;
2220
2221	err = acpi_check_resource_conflict(&res);
2222	if (err)
2223		goto exit;
2224
2225	pdev = platform_device_alloc(DRVNAME, address);
2226	if (!pdev) {
2227		err = -ENOMEM;
2228		pr_err("Device allocation failed\n");
2229		goto exit;
2230	}
2231
2232	err = platform_device_add_resources(pdev, &res, 1);
2233	if (err) {
2234		pr_err("Device resource addition failed (%d)\n", err);
2235		goto exit_device_put;
2236	}
2237
2238	err = platform_device_add_data(pdev, sio_data,
2239				       sizeof(struct it87_sio_data));
2240	if (err) {
2241		pr_err("Platform data allocation failed\n");
2242		goto exit_device_put;
2243	}
2244
2245	err = platform_device_add(pdev);
2246	if (err) {
2247		pr_err("Device addition failed (%d)\n", err);
2248		goto exit_device_put;
2249	}
2250
2251	return 0;
2252
2253exit_device_put:
2254	platform_device_put(pdev);
2255exit:
2256	return err;
2257}
2258
2259static int __init sm_it87_init(void)
2260{
2261	int err;
2262	unsigned short isa_address = 0;
2263	struct it87_sio_data sio_data;
2264
2265	memset(&sio_data, 0, sizeof(struct it87_sio_data));
2266	err = it87_find(&isa_address, &sio_data);
2267	if (err)
2268		return err;
2269	err = platform_driver_register(&it87_driver);
2270	if (err)
2271		return err;
2272
2273	err = it87_device_add(isa_address, &sio_data);
2274	if (err) {
2275		platform_driver_unregister(&it87_driver);
2276		return err;
2277	}
2278
2279	return 0;
2280}
2281
2282static void __exit sm_it87_exit(void)
2283{
2284	platform_device_unregister(pdev);
2285	platform_driver_unregister(&it87_driver);
2286}
2287
2288
2289MODULE_AUTHOR("Chris Gauthron, "
2290	      "Jean Delvare <khali@linux-fr.org>");
2291MODULE_DESCRIPTION("IT8705F/IT871xF/IT872xF hardware monitoring driver");
2292module_param(update_vbat, bool, 0);
2293MODULE_PARM_DESC(update_vbat, "Update vbat if set else return powerup value");
2294module_param(fix_pwm_polarity, bool, 0);
2295MODULE_PARM_DESC(fix_pwm_polarity,
2296		 "Force PWM polarity to active high (DANGEROUS)");
2297MODULE_LICENSE("GPL");
2298
2299module_init(sm_it87_init);
2300module_exit(sm_it87_exit);