applesmc.c 47.8 KB
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/*
 * drivers/hwmon/applesmc.c - driver for Apple's SMC (accelerometer, temperature
 * sensors, fan control, keyboard backlight control) used in Intel-based Apple
 * computers.
 *
 * Copyright (C) 2007 Nicolas Boichat <nicolas@boichat.ch>
 *
 * Based on hdaps.c driver:
 * Copyright (C) 2005 Robert Love <rml@novell.com>
 * Copyright (C) 2005 Jesper Juhl <jesper.juhl@gmail.com>
 *
 * Fan control based on smcFanControl:
 * Copyright (C) 2006 Hendrik Holtmann <holtmann@mac.com>
 *
 * This program is free software; you can redistribute it and/or modify it
 * under the terms of the GNU General Public License v2 as published by the
 * Free Software Foundation.
 *
 * This program is distributed in the hope that it will be useful, but WITHOUT
 * ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or
 * FITNESS FOR A PARTICULAR PURPOSE.  See the GNU General Public License for
 * more details.
 *
 * You should have received a copy of the GNU General Public License along with
 * this program; if not, write to the Free Software Foundation, Inc.,
 * 51 Franklin Street, Fifth Floor, Boston, MA  02110-1301, USA
 */

#include <linux/delay.h>
#include <linux/platform_device.h>
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#include <linux/input-polldev.h>
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#include <linux/kernel.h>
#include <linux/module.h>
#include <linux/timer.h>
#include <linux/dmi.h>
#include <linux/mutex.h>
#include <linux/hwmon-sysfs.h>
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#include <linux/io.h>
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#include <linux/leds.h>
#include <linux/hwmon.h>
#include <linux/workqueue.h>

/* data port used by Apple SMC */
#define APPLESMC_DATA_PORT	0x300
/* command/status port used by Apple SMC */
#define APPLESMC_CMD_PORT	0x304

#define APPLESMC_NR_PORTS	32 /* 0x300-0x31f */

#define APPLESMC_MAX_DATA_LENGTH 32

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#define APPLESMC_MIN_WAIT	0x0040
#define APPLESMC_MAX_WAIT	0x8000

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#define APPLESMC_STATUS_MASK	0x0f
#define APPLESMC_READ_CMD	0x10
#define APPLESMC_WRITE_CMD	0x11
#define APPLESMC_GET_KEY_BY_INDEX_CMD	0x12
#define APPLESMC_GET_KEY_TYPE_CMD	0x13

#define KEY_COUNT_KEY		"#KEY" /* r-o ui32 */

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#define LIGHT_SENSOR_LEFT_KEY	"ALV0" /* r-o {alv (6-10 bytes) */
#define LIGHT_SENSOR_RIGHT_KEY	"ALV1" /* r-o {alv (6-10 bytes) */
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#define BACKLIGHT_KEY		"LKSB" /* w-o {lkb (2 bytes) */
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#define CLAMSHELL_KEY		"MSLD" /* r-o ui8 (unused) */
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#define MOTION_SENSOR_X_KEY	"MO_X" /* r-o sp78 (2 bytes) */
#define MOTION_SENSOR_Y_KEY	"MO_Y" /* r-o sp78 (2 bytes) */
#define MOTION_SENSOR_Z_KEY	"MO_Z" /* r-o sp78 (2 bytes) */
#define MOTION_SENSOR_KEY	"MOCN" /* r/w ui16 */

#define FANS_COUNT		"FNum" /* r-o ui8 */
#define FANS_MANUAL		"FS! " /* r-w ui16 */
#define FAN_ACTUAL_SPEED	"F0Ac" /* r-o fpe2 (2 bytes) */
#define FAN_MIN_SPEED		"F0Mn" /* r-o fpe2 (2 bytes) */
#define FAN_MAX_SPEED		"F0Mx" /* r-o fpe2 (2 bytes) */
#define FAN_SAFE_SPEED		"F0Sf" /* r-o fpe2 (2 bytes) */
#define FAN_TARGET_SPEED	"F0Tg" /* r-w fpe2 (2 bytes) */
#define FAN_POSITION		"F0ID" /* r-o char[16] */

/*
 * Temperature sensors keys (sp78 - 2 bytes).
 */
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static const char *temperature_sensors_sets[][41] = {
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/* Set 0: Macbook Pro */
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	{ "TA0P", "TB0T", "TC0D", "TC0P", "TG0H", "TG0P", "TG0T", "Th0H",
	  "Th1H", "Tm0P", "Ts0P", "Ts1P", NULL },
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/* Set 1: Macbook2 set */
	{ "TB0T", "TC0D", "TC0P", "TM0P", "TN0P", "TN1P", "TTF0", "Th0H",
	  "Th0S", "Th1H", NULL },
/* Set 2: Macbook set */
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	{ "TB0T", "TC0D", "TC0P", "TM0P", "TN0P", "TN1P", "Th0H", "Th0S",
	  "Th1H", "Ts0P", NULL },
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/* Set 3: Macmini set */
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	{ "TC0D", "TC0P", NULL },
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/* Set 4: Mac Pro (2 x Quad-Core) */
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	{ "TA0P", "TCAG", "TCAH", "TCBG", "TCBH", "TC0C", "TC0D", "TC0P",
	  "TC1C", "TC1D", "TC2C", "TC2D", "TC3C", "TC3D", "THTG", "TH0P",
	  "TH1P", "TH2P", "TH3P", "TMAP", "TMAS", "TMBS", "TM0P", "TM0S",
	  "TM1P", "TM1S", "TM2P", "TM2S", "TM3S", "TM8P", "TM8S", "TM9P",
	  "TM9S", "TN0H", "TS0C", NULL },
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/* Set 5: iMac */
	{ "TC0D", "TA0P", "TG0P", "TG0D", "TG0H", "TH0P", "Tm0P", "TO0P",
	  "Tp0C", NULL },
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/* Set 6: Macbook3 set */
	{ "TB0T", "TC0D", "TC0P", "TM0P", "TN0P", "TTF0", "TW0P", "Th0H",
	  "Th0S", "Th1H", NULL },
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/* Set 7: Macbook Air */
	{ "TB0T", "TB1S", "TB1T", "TB2S", "TB2T", "TC0D", "TC0P", "TCFP",
	  "TTF0", "TW0P", "Th0H", "Tp0P", "TpFP", "Ts0P", "Ts0S", NULL },
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/* Set 8: Macbook Pro 4,1 (Penryn) */
	{ "TB0T", "TC0D", "TC0P", "TG0D", "TG0H", "TTF0", "TW0P", "Th0H",
	  "Th1H", "Th2H", "Tm0P", "Ts0P", NULL },
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/* Set 9: Macbook Pro 3,1 (Santa Rosa) */
	{ "TALP", "TB0T", "TC0D", "TC0P", "TG0D", "TG0H", "TTF0", "TW0P",
	  "Th0H", "Th1H", "Th2H", "Tm0P", "Ts0P", NULL },
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/* Set 10: iMac 5,1 */
	{ "TA0P", "TC0D", "TC0P", "TG0D", "TH0P", "TO0P", "Tm0P", NULL },
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/* Set 11: Macbook 5,1 */
	{ "TB0T", "TB1T", "TB2T", "TB3T", "TC0D", "TC0P", "TN0D", "TN0P",
	  "TTF0", "Th0H", "Th1H", "ThFH", "Ts0P", "Ts0S", NULL },
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/* Set 12: Macbook Pro 5,1 */
	{ "TB0T", "TB1T", "TB2T", "TB3T", "TC0D", "TC0F", "TC0P", "TG0D",
	  "TG0F", "TG0H", "TG0P", "TG0T", "TG1H", "TN0D", "TN0P", "TTF0",
	  "Th2H", "Tm0P", "Ts0P", "Ts0S", NULL },
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/* Set 13: iMac 8,1 */
	{ "TA0P", "TC0D", "TC0H", "TC0P", "TG0D", "TG0H", "TG0P", "TH0P",
	  "TL0P", "TO0P", "TW0P", "Tm0P", "Tp0P", NULL },
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/* Set 14: iMac 6,1 */
	{ "TA0P", "TC0D", "TC0H", "TC0P", "TG0D", "TG0H", "TG0P", "TH0P",
	  "TO0P", "Tp0P", NULL },
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/* Set 15: MacBook Air 2,1 */
	{ "TB0T", "TB1S", "TB1T", "TB2S", "TB2T", "TC0D", "TN0D", "TTF0",
	  "TV0P", "TVFP", "TW0P", "Th0P", "Tp0P", "Tp1P", "TpFP", "Ts0P",
	  "Ts0S", NULL },
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/* Set 16: Mac Pro 3,1 (2 x Quad-Core) */
	{ "TA0P", "TCAG", "TCAH", "TCBG", "TCBH", "TC0C", "TC0D", "TC0P",
	  "TC1C", "TC1D", "TC2C", "TC2D", "TC3C", "TC3D", "TH0P", "TH1P",
	  "TH2P", "TH3P", "TMAP", "TMAS", "TMBS", "TM0P", "TM0S", "TM1P",
	  "TM1S", "TM2P", "TM2S", "TM3S", "TM8P", "TM8S", "TM9P", "TM9S",
	  "TN0C", "TN0D", "TN0H", "TS0C", "Tp0C", "Tp1C", "Tv0S", "Tv1S",
	  NULL },
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/* Set 17: iMac 9,1 */
	{ "TA0P", "TC0D", "TC0H", "TC0P", "TG0D", "TG0H", "TH0P", "TL0P",
	  "TN0D", "TN0H", "TN0P", "TO0P", "Tm0P", "Tp0P", NULL },
/* Set 18: MacBook Pro 2,2 */
	{ "TB0T", "TC0D", "TC0P", "TG0H", "TG0P", "TG0T", "TM0P", "TTF0",
	  "Th0H", "Th1H", "Tm0P", "Ts0P", NULL },
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/* Set 19: Macbook Pro 5,3 */
	{ "TB0T", "TB1T", "TB2T", "TB3T", "TC0D", "TC0F", "TC0P", "TG0D",
	  "TG0F", "TG0H", "TG0P", "TG0T", "TN0D", "TN0P", "TTF0", "Th2H",
	  "Tm0P", "Ts0P", "Ts0S", NULL },
/* Set 20: MacBook Pro 5,4 */
	{ "TB0T", "TB1T", "TB2T", "TB3T", "TC0D", "TC0F", "TC0P", "TN0D",
	  "TN0P", "TTF0", "Th2H", "Ts0P", "Ts0S", NULL },
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/* Set 21: MacBook Pro 6,2 */
	{ "TB0T", "TB1T", "TB2T", "TC0C", "TC0D", "TC0P", "TC1C", "TG0D",
	  "TG0P", "TG0T", "TMCD", "TP0P", "TPCD", "Th1H", "Th2H", "Tm0P",
	  "Ts0P", "Ts0S", NULL },
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/* Set 22: MacBook Pro 7,1 */
	{ "TB0T", "TB1T", "TB2T", "TC0D", "TC0P", "TN0D", "TN0P", "TN0S",
	  "TN1D", "TN1F", "TN1G", "TN1S", "Th1H", "Ts0P", "Ts0S", NULL },
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};

/* List of keys used to read/write fan speeds */
static const char* fan_speed_keys[] = {
	FAN_ACTUAL_SPEED,
	FAN_MIN_SPEED,
	FAN_MAX_SPEED,
	FAN_SAFE_SPEED,
	FAN_TARGET_SPEED
};

#define INIT_TIMEOUT_MSECS	5000	/* wait up to 5s for device init ... */
#define INIT_WAIT_MSECS		50	/* ... in 50ms increments */

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#define APPLESMC_POLL_INTERVAL	50	/* msecs */
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#define APPLESMC_INPUT_FUZZ	4	/* input event threshold */
#define APPLESMC_INPUT_FLAT	4

#define SENSOR_X 0
#define SENSOR_Y 1
#define SENSOR_Z 2

/* Structure to be passed to DMI_MATCH function */
struct dmi_match_data {
/* Indicates whether this computer has an accelerometer. */
	int accelerometer;
/* Indicates whether this computer has light sensors and keyboard backlight. */
	int light;
/* Indicates which temperature sensors set to use. */
	int temperature_set;
};

static const int debug;
static struct platform_device *pdev;
static s16 rest_x;
static s16 rest_y;
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static u8 backlight_state[2];

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static struct device *hwmon_dev;
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static struct input_polled_dev *applesmc_idev;
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/* Indicates whether this computer has an accelerometer. */
static unsigned int applesmc_accelerometer;

/* Indicates whether this computer has light sensors and keyboard backlight. */
static unsigned int applesmc_light;

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/* The number of fans handled by the driver */
static unsigned int fans_handled;

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/* Indicates which temperature sensors set to use. */
static unsigned int applesmc_temperature_set;

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static DEFINE_MUTEX(applesmc_lock);
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/*
 * Last index written to key_at_index sysfs file, and value to use for all other
 * key_at_index_* sysfs files.
 */
static unsigned int key_at_index;

static struct workqueue_struct *applesmc_led_wq;

/*
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 * __wait_status - Wait up to 32ms for the status port to get a certain value
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 * (masked with 0x0f), returning zero if the value is obtained.  Callers must
 * hold applesmc_lock.
 */
static int __wait_status(u8 val)
{
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	int us;
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	val = val & APPLESMC_STATUS_MASK;

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	for (us = APPLESMC_MIN_WAIT; us < APPLESMC_MAX_WAIT; us <<= 1) {
		udelay(us);
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		if ((inb(APPLESMC_CMD_PORT) & APPLESMC_STATUS_MASK) == val) {
			if (debug)
				printk(KERN_DEBUG
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					"Waited %d us for status %x\n",
					2 * us - APPLESMC_MIN_WAIT, val);
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			return 0;
		}
	}

	printk(KERN_WARNING "applesmc: wait status failed: %x != %x\n",
						val, inb(APPLESMC_CMD_PORT));

	return -EIO;
}

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/*
 * special treatment of command port - on newer macbooks, it seems necessary
 * to resend the command byte before polling the status again. Callers must
 * hold applesmc_lock.
 */
static int send_command(u8 cmd)
{
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	int us;
	for (us = APPLESMC_MIN_WAIT; us < APPLESMC_MAX_WAIT; us <<= 1) {
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		outb(cmd, APPLESMC_CMD_PORT);
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		udelay(us);
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		if ((inb(APPLESMC_CMD_PORT) & APPLESMC_STATUS_MASK) == 0x0c)
			return 0;
	}
	printk(KERN_WARNING "applesmc: command failed: %x -> %x\n",
		cmd, inb(APPLESMC_CMD_PORT));
	return -EIO;
}

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/*
 * applesmc_read_key - reads len bytes from a given key, and put them in buffer.
 * Returns zero on success or a negative error on failure. Callers must
 * hold applesmc_lock.
 */
static int applesmc_read_key(const char* key, u8* buffer, u8 len)
{
	int i;

	if (len > APPLESMC_MAX_DATA_LENGTH) {
		printk(KERN_ERR	"applesmc_read_key: cannot read more than "
					"%d bytes\n", APPLESMC_MAX_DATA_LENGTH);
		return -EINVAL;
	}

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	if (send_command(APPLESMC_READ_CMD))
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		return -EIO;

	for (i = 0; i < 4; i++) {
		outb(key[i], APPLESMC_DATA_PORT);
		if (__wait_status(0x04))
			return -EIO;
	}
	if (debug)
		printk(KERN_DEBUG "<%s", key);

	outb(len, APPLESMC_DATA_PORT);
	if (debug)
		printk(KERN_DEBUG ">%x", len);

	for (i = 0; i < len; i++) {
		if (__wait_status(0x05))
			return -EIO;
		buffer[i] = inb(APPLESMC_DATA_PORT);
		if (debug)
			printk(KERN_DEBUG "<%x", buffer[i]);
	}
	if (debug)
		printk(KERN_DEBUG "\n");

	return 0;
}

/*
 * applesmc_write_key - writes len bytes from buffer to a given key.
 * Returns zero on success or a negative error on failure. Callers must
 * hold applesmc_lock.
 */
static int applesmc_write_key(const char* key, u8* buffer, u8 len)
{
	int i;

	if (len > APPLESMC_MAX_DATA_LENGTH) {
		printk(KERN_ERR	"applesmc_write_key: cannot write more than "
					"%d bytes\n", APPLESMC_MAX_DATA_LENGTH);
		return -EINVAL;
	}

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	if (send_command(APPLESMC_WRITE_CMD))
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		return -EIO;

	for (i = 0; i < 4; i++) {
		outb(key[i], APPLESMC_DATA_PORT);
		if (__wait_status(0x04))
			return -EIO;
	}

	outb(len, APPLESMC_DATA_PORT);

	for (i = 0; i < len; i++) {
		if (__wait_status(0x04))
			return -EIO;
		outb(buffer[i], APPLESMC_DATA_PORT);
	}

	return 0;
}

/*
 * applesmc_get_key_at_index - get key at index, and put the result in key
 * (char[6]). Returns zero on success or a negative error on failure. Callers
 * must hold applesmc_lock.
 */
static int applesmc_get_key_at_index(int index, char* key)
{
	int i;
	u8 readkey[4];
	readkey[0] = index >> 24;
	readkey[1] = index >> 16;
	readkey[2] = index >> 8;
	readkey[3] = index;

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	if (send_command(APPLESMC_GET_KEY_BY_INDEX_CMD))
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		return -EIO;

	for (i = 0; i < 4; i++) {
		outb(readkey[i], APPLESMC_DATA_PORT);
		if (__wait_status(0x04))
			return -EIO;
	}

	outb(4, APPLESMC_DATA_PORT);

	for (i = 0; i < 4; i++) {
		if (__wait_status(0x05))
			return -EIO;
		key[i] = inb(APPLESMC_DATA_PORT);
	}
	key[4] = 0;

	return 0;
}

/*
 * applesmc_get_key_type - get key type, and put the result in type (char[6]).
 * Returns zero on success or a negative error on failure. Callers must
 * hold applesmc_lock.
 */
static int applesmc_get_key_type(char* key, char* type)
{
	int i;

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	if (send_command(APPLESMC_GET_KEY_TYPE_CMD))
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		return -EIO;

	for (i = 0; i < 4; i++) {
		outb(key[i], APPLESMC_DATA_PORT);
		if (__wait_status(0x04))
			return -EIO;
	}

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	outb(6, APPLESMC_DATA_PORT);
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	for (i = 0; i < 6; i++) {
		if (__wait_status(0x05))
			return -EIO;
		type[i] = inb(APPLESMC_DATA_PORT);
	}
	type[5] = 0;

	return 0;
}

/*
 * applesmc_read_motion_sensor - Read motion sensor (X, Y or Z). Callers must
 * hold applesmc_lock.
 */
static int applesmc_read_motion_sensor(int index, s16* value)
{
	u8 buffer[2];
	int ret;

	switch (index) {
	case SENSOR_X:
		ret = applesmc_read_key(MOTION_SENSOR_X_KEY, buffer, 2);
		break;
	case SENSOR_Y:
		ret = applesmc_read_key(MOTION_SENSOR_Y_KEY, buffer, 2);
		break;
	case SENSOR_Z:
		ret = applesmc_read_key(MOTION_SENSOR_Z_KEY, buffer, 2);
		break;
	default:
		ret = -EINVAL;
	}

	*value = ((s16)buffer[0] << 8) | buffer[1];

	return ret;
}

/*
 * applesmc_device_init - initialize the accelerometer.  Returns zero on success
 * and negative error code on failure.  Can sleep.
 */
static int applesmc_device_init(void)
{
	int total, ret = -ENXIO;
	u8 buffer[2];

	if (!applesmc_accelerometer)
		return 0;

	mutex_lock(&applesmc_lock);

	for (total = INIT_TIMEOUT_MSECS; total > 0; total -= INIT_WAIT_MSECS) {
		if (debug)
			printk(KERN_DEBUG "applesmc try %d\n", total);
		if (!applesmc_read_key(MOTION_SENSOR_KEY, buffer, 2) &&
				(buffer[0] != 0x00 || buffer[1] != 0x00)) {
			if (total == INIT_TIMEOUT_MSECS) {
				printk(KERN_DEBUG "applesmc: device has"
						" already been initialized"
						" (0x%02x, 0x%02x).\n",
						buffer[0], buffer[1]);
			} else {
				printk(KERN_DEBUG "applesmc: device"
						" successfully initialized"
						" (0x%02x, 0x%02x).\n",
						buffer[0], buffer[1]);
			}
			ret = 0;
			goto out;
		}
		buffer[0] = 0xe0;
		buffer[1] = 0x00;
		applesmc_write_key(MOTION_SENSOR_KEY, buffer, 2);
		msleep(INIT_WAIT_MSECS);
	}

	printk(KERN_WARNING "applesmc: failed to init the device\n");

out:
	mutex_unlock(&applesmc_lock);
	return ret;
}

/*
 * applesmc_get_fan_count - get the number of fans. Callers must NOT hold
 * applesmc_lock.
 */
static int applesmc_get_fan_count(void)
{
	int ret;
	u8 buffer[1];

	mutex_lock(&applesmc_lock);

	ret = applesmc_read_key(FANS_COUNT, buffer, 1);

	mutex_unlock(&applesmc_lock);
	if (ret)
		return ret;
	else
		return buffer[0];
}

/* Device model stuff */
static int applesmc_probe(struct platform_device *dev)
{
	int ret;

	ret = applesmc_device_init();
	if (ret)
		return ret;

	printk(KERN_INFO "applesmc: device successfully initialized.\n");
	return 0;
}

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/* Synchronize device with memorized backlight state */
static int applesmc_pm_resume(struct device *dev)
{
	mutex_lock(&applesmc_lock);
	if (applesmc_light)
		applesmc_write_key(BACKLIGHT_KEY, backlight_state, 2);
	mutex_unlock(&applesmc_lock);
	return 0;
}

/* Reinitialize device on resume from hibernation */
static int applesmc_pm_restore(struct device *dev)
537
{
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541
	int ret = applesmc_device_init();
	if (ret)
		return ret;
	return applesmc_pm_resume(dev);
542
543
}

544
static const struct dev_pm_ops applesmc_pm_ops = {
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	.resume = applesmc_pm_resume,
	.restore = applesmc_pm_restore,
};

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static struct platform_driver applesmc_driver = {
	.probe = applesmc_probe,
	.driver	= {
		.name = "applesmc",
		.owner = THIS_MODULE,
554
		.pm = &applesmc_pm_ops,
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	},
};

/*
 * applesmc_calibrate - Set our "resting" values.  Callers must
 * hold applesmc_lock.
 */
static void applesmc_calibrate(void)
{
	applesmc_read_motion_sensor(SENSOR_X, &rest_x);
	applesmc_read_motion_sensor(SENSOR_Y, &rest_y);
	rest_x = -rest_x;
}

569
static void applesmc_idev_poll(struct input_polled_dev *dev)
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{
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	struct input_dev *idev = dev->input;
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	s16 x, y;

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	mutex_lock(&applesmc_lock);
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	if (applesmc_read_motion_sensor(SENSOR_X, &x))
		goto out;
	if (applesmc_read_motion_sensor(SENSOR_Y, &y))
		goto out;

	x = -x;
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	input_report_abs(idev, ABS_X, x - rest_x);
	input_report_abs(idev, ABS_Y, y - rest_y);
	input_sync(idev);
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out:
	mutex_unlock(&applesmc_lock);
}

/* Sysfs Files */

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static ssize_t applesmc_name_show(struct device *dev,
				   struct device_attribute *attr, char *buf)
{
	return snprintf(buf, PAGE_SIZE, "applesmc\n");
}

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static ssize_t applesmc_position_show(struct device *dev,
				   struct device_attribute *attr, char *buf)
{
	int ret;
	s16 x, y, z;

	mutex_lock(&applesmc_lock);

	ret = applesmc_read_motion_sensor(SENSOR_X, &x);
	if (ret)
		goto out;
	ret = applesmc_read_motion_sensor(SENSOR_Y, &y);
	if (ret)
		goto out;
	ret = applesmc_read_motion_sensor(SENSOR_Z, &z);
	if (ret)
		goto out;

out:
	mutex_unlock(&applesmc_lock);
	if (ret)
		return ret;
	else
		return snprintf(buf, PAGE_SIZE, "(%d,%d,%d)\n", x, y, z);
}

static ssize_t applesmc_light_show(struct device *dev,
				struct device_attribute *attr, char *sysfsbuf)
{
627
	static int data_length;
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	int ret;
	u8 left = 0, right = 0;
630
	u8 buffer[10], query[6];
631
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	mutex_lock(&applesmc_lock);

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	if (!data_length) {
		ret = applesmc_get_key_type(LIGHT_SENSOR_LEFT_KEY, query);
		if (ret)
			goto out;
		data_length = clamp_val(query[0], 0, 10);
		printk(KERN_INFO "applesmc: light sensor data length set to "
			"%d\n", data_length);
	}

	ret = applesmc_read_key(LIGHT_SENSOR_LEFT_KEY, buffer, data_length);
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	/* newer macbooks report a single 10-bit bigendian value */
	if (data_length == 10) {
		left = be16_to_cpu(*(__be16 *)(buffer + 6)) >> 2;
		goto out;
	}
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	left = buffer[2];
	if (ret)
		goto out;
652
	ret = applesmc_read_key(LIGHT_SENSOR_RIGHT_KEY, buffer, data_length);
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	right = buffer[2];

out:
	mutex_unlock(&applesmc_lock);
	if (ret)
		return ret;
	else
		return snprintf(sysfsbuf, PAGE_SIZE, "(%d,%d)\n", left, right);
}

/* Displays degree Celsius * 1000 */
static ssize_t applesmc_show_temperature(struct device *dev,
			struct device_attribute *devattr, char *sysfsbuf)
{
	int ret;
	u8 buffer[2];
	unsigned int temp;
	struct sensor_device_attribute *attr = to_sensor_dev_attr(devattr);
	const char* key =
		temperature_sensors_sets[applesmc_temperature_set][attr->index];

	mutex_lock(&applesmc_lock);

	ret = applesmc_read_key(key, buffer, 2);
	temp = buffer[0]*1000;
	temp += (buffer[1] >> 6) * 250;

	mutex_unlock(&applesmc_lock);

	if (ret)
		return ret;
	else
		return snprintf(sysfsbuf, PAGE_SIZE, "%u\n", temp);
}

static ssize_t applesmc_show_fan_speed(struct device *dev,
				struct device_attribute *attr, char *sysfsbuf)
{
	int ret;
	unsigned int speed = 0;
	char newkey[5];
	u8 buffer[2];
	struct sensor_device_attribute_2 *sensor_attr =
						to_sensor_dev_attr_2(attr);

	newkey[0] = fan_speed_keys[sensor_attr->nr][0];
	newkey[1] = '0' + sensor_attr->index;
	newkey[2] = fan_speed_keys[sensor_attr->nr][2];
	newkey[3] = fan_speed_keys[sensor_attr->nr][3];
	newkey[4] = 0;

	mutex_lock(&applesmc_lock);

	ret = applesmc_read_key(newkey, buffer, 2);
	speed = ((buffer[0] << 8 | buffer[1]) >> 2);

	mutex_unlock(&applesmc_lock);
	if (ret)
		return ret;
	else
		return snprintf(sysfsbuf, PAGE_SIZE, "%u\n", speed);
}

static ssize_t applesmc_store_fan_speed(struct device *dev,
					struct device_attribute *attr,
					const char *sysfsbuf, size_t count)
{
	int ret;
	u32 speed;
	char newkey[5];
	u8 buffer[2];
	struct sensor_device_attribute_2 *sensor_attr =
						to_sensor_dev_attr_2(attr);

	speed = simple_strtoul(sysfsbuf, NULL, 10);

	if (speed > 0x4000) /* Bigger than a 14-bit value */
		return -EINVAL;

	newkey[0] = fan_speed_keys[sensor_attr->nr][0];
	newkey[1] = '0' + sensor_attr->index;
	newkey[2] = fan_speed_keys[sensor_attr->nr][2];
	newkey[3] = fan_speed_keys[sensor_attr->nr][3];
	newkey[4] = 0;

	mutex_lock(&applesmc_lock);

	buffer[0] = (speed >> 6) & 0xff;
	buffer[1] = (speed << 2) & 0xff;
	ret = applesmc_write_key(newkey, buffer, 2);

	mutex_unlock(&applesmc_lock);
	if (ret)
		return ret;
	else
		return count;
}

static ssize_t applesmc_show_fan_manual(struct device *dev,
			struct device_attribute *devattr, char *sysfsbuf)
{
	int ret;
	u16 manual = 0;
	u8 buffer[2];
	struct sensor_device_attribute *attr = to_sensor_dev_attr(devattr);

	mutex_lock(&applesmc_lock);

	ret = applesmc_read_key(FANS_MANUAL, buffer, 2);
	manual = ((buffer[0] << 8 | buffer[1]) >> attr->index) & 0x01;

	mutex_unlock(&applesmc_lock);
	if (ret)
		return ret;
	else
		return snprintf(sysfsbuf, PAGE_SIZE, "%d\n", manual);
}

static ssize_t applesmc_store_fan_manual(struct device *dev,
					 struct device_attribute *devattr,
					 const char *sysfsbuf, size_t count)
{
	int ret;
	u8 buffer[2];
	u32 input;
	u16 val;
	struct sensor_device_attribute *attr = to_sensor_dev_attr(devattr);

	input = simple_strtoul(sysfsbuf, NULL, 10);

	mutex_lock(&applesmc_lock);

	ret = applesmc_read_key(FANS_MANUAL, buffer, 2);
	val = (buffer[0] << 8 | buffer[1]);
	if (ret)
		goto out;

	if (input)
		val = val | (0x01 << attr->index);
	else
		val = val & ~(0x01 << attr->index);

	buffer[0] = (val >> 8) & 0xFF;
	buffer[1] = val & 0xFF;

	ret = applesmc_write_key(FANS_MANUAL, buffer, 2);

out:
	mutex_unlock(&applesmc_lock);
	if (ret)
		return ret;
	else
		return count;
}

static ssize_t applesmc_show_fan_position(struct device *dev,
				struct device_attribute *attr, char *sysfsbuf)
{
	int ret;
	char newkey[5];
	u8 buffer[17];
	struct sensor_device_attribute_2 *sensor_attr =
						to_sensor_dev_attr_2(attr);

	newkey[0] = FAN_POSITION[0];
	newkey[1] = '0' + sensor_attr->index;
	newkey[2] = FAN_POSITION[2];
	newkey[3] = FAN_POSITION[3];
	newkey[4] = 0;

	mutex_lock(&applesmc_lock);

	ret = applesmc_read_key(newkey, buffer, 16);
	buffer[16] = 0;

	mutex_unlock(&applesmc_lock);
	if (ret)
		return ret;
	else
		return snprintf(sysfsbuf, PAGE_SIZE, "%s\n", buffer+4);
}

static ssize_t applesmc_calibrate_show(struct device *dev,
				struct device_attribute *attr, char *sysfsbuf)
{
	return snprintf(sysfsbuf, PAGE_SIZE, "(%d,%d)\n", rest_x, rest_y);
}

static ssize_t applesmc_calibrate_store(struct device *dev,
	struct device_attribute *attr, const char *sysfsbuf, size_t count)
{
	mutex_lock(&applesmc_lock);
	applesmc_calibrate();
	mutex_unlock(&applesmc_lock);

	return count;
}

static void applesmc_backlight_set(struct work_struct *work)
{
	mutex_lock(&applesmc_lock);
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	applesmc_write_key(BACKLIGHT_KEY, backlight_state, 2);
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	mutex_unlock(&applesmc_lock);
}
static DECLARE_WORK(backlight_work, &applesmc_backlight_set);

static void applesmc_brightness_set(struct led_classdev *led_cdev,
						enum led_brightness value)
{
	int ret;

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	backlight_state[0] = value;
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	ret = queue_work(applesmc_led_wq, &backlight_work);

	if (debug && (!ret))
		printk(KERN_DEBUG "applesmc: work was already on the queue.\n");
}

static ssize_t applesmc_key_count_show(struct device *dev,
				struct device_attribute *attr, char *sysfsbuf)
{
	int ret;
	u8 buffer[4];
	u32 count;

	mutex_lock(&applesmc_lock);

	ret = applesmc_read_key(KEY_COUNT_KEY, buffer, 4);
	count = ((u32)buffer[0]<<24) + ((u32)buffer[1]<<16) +
						((u32)buffer[2]<<8) + buffer[3];

	mutex_unlock(&applesmc_lock);
	if (ret)
		return ret;
	else
		return snprintf(sysfsbuf, PAGE_SIZE, "%d\n", count);
}

static ssize_t applesmc_key_at_index_read_show(struct device *dev,
				struct device_attribute *attr, char *sysfsbuf)
{
	char key[5];
	char info[6];
	int ret;

	mutex_lock(&applesmc_lock);

	ret = applesmc_get_key_at_index(key_at_index, key);

	if (ret || !key[0]) {
		mutex_unlock(&applesmc_lock);

		return -EINVAL;
	}

	ret = applesmc_get_key_type(key, info);

	if (ret) {
		mutex_unlock(&applesmc_lock);

		return ret;
	}

	/*
	 * info[0] maximum value (APPLESMC_MAX_DATA_LENGTH) is much lower than
	 * PAGE_SIZE, so we don't need any checks before writing to sysfsbuf.
	 */
	ret = applesmc_read_key(key, sysfsbuf, info[0]);

	mutex_unlock(&applesmc_lock);

	if (!ret) {
		return info[0];
926
	} else {
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		return ret;
	}
}

static ssize_t applesmc_key_at_index_data_length_show(struct device *dev,
				struct device_attribute *attr, char *sysfsbuf)
{
	char key[5];
	char info[6];
	int ret;

	mutex_lock(&applesmc_lock);

	ret = applesmc_get_key_at_index(key_at_index, key);

	if (ret || !key[0]) {
		mutex_unlock(&applesmc_lock);

		return -EINVAL;
	}

	ret = applesmc_get_key_type(key, info);

	mutex_unlock(&applesmc_lock);

	if (!ret)
		return snprintf(sysfsbuf, PAGE_SIZE, "%d\n", info[0]);
	else
		return ret;
}

static ssize_t applesmc_key_at_index_type_show(struct device *dev,
				struct device_attribute *attr, char *sysfsbuf)
{
	char key[5];
	char info[6];
	int ret;

	mutex_lock(&applesmc_lock);

	ret = applesmc_get_key_at_index(key_at_index, key);

	if (ret || !key[0]) {
		mutex_unlock(&applesmc_lock);

		return -EINVAL;
	}

	ret = applesmc_get_key_type(key, info);

	mutex_unlock(&applesmc_lock);

	if (!ret)
		return snprintf(sysfsbuf, PAGE_SIZE, "%s\n", info+1);
	else
		return ret;
}

static ssize_t applesmc_key_at_index_name_show(struct device *dev,
				struct device_attribute *attr, char *sysfsbuf)
{
	char key[5];
	int ret;

	mutex_lock(&applesmc_lock);

	ret = applesmc_get_key_at_index(key_at_index, key);

	mutex_unlock(&applesmc_lock);

	if (!ret && key[0])
		return snprintf(sysfsbuf, PAGE_SIZE, "%s\n", key);
	else
		return -EINVAL;
}

static ssize_t applesmc_key_at_index_show(struct device *dev,
				struct device_attribute *attr, char *sysfsbuf)
{
	return snprintf(sysfsbuf, PAGE_SIZE, "%d\n", key_at_index);
}

static ssize_t applesmc_key_at_index_store(struct device *dev,
	struct device_attribute *attr, const char *sysfsbuf, size_t count)
{
	mutex_lock(&applesmc_lock);

	key_at_index = simple_strtoul(sysfsbuf, NULL, 10);

	mutex_unlock(&applesmc_lock);

	return count;
}

static struct led_classdev applesmc_backlight = {
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	.name			= "smc::kbd_backlight",
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	.default_trigger	= "nand-disk",
	.brightness_set		= applesmc_brightness_set,
};

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static DEVICE_ATTR(name, 0444, applesmc_name_show, NULL);

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static DEVICE_ATTR(position, 0444, applesmc_position_show, NULL);
static DEVICE_ATTR(calibrate, 0644,
			applesmc_calibrate_show, applesmc_calibrate_store);

static struct attribute *accelerometer_attributes[] = {
	&dev_attr_position.attr,
	&dev_attr_calibrate.attr,
	NULL
};

static const struct attribute_group accelerometer_attributes_group =
	{ .attrs = accelerometer_attributes };

static DEVICE_ATTR(light, 0444, applesmc_light_show, NULL);

static DEVICE_ATTR(key_count, 0444, applesmc_key_count_show, NULL);
static DEVICE_ATTR(key_at_index, 0644,
		applesmc_key_at_index_show, applesmc_key_at_index_store);
static DEVICE_ATTR(key_at_index_name, 0444,
					applesmc_key_at_index_name_show, NULL);
static DEVICE_ATTR(key_at_index_type, 0444,
					applesmc_key_at_index_type_show, NULL);
static DEVICE_ATTR(key_at_index_data_length, 0444,
				applesmc_key_at_index_data_length_show, NULL);
static DEVICE_ATTR(key_at_index_data, 0444,
				applesmc_key_at_index_read_show, NULL);

static struct attribute *key_enumeration_attributes[] = {
	&dev_attr_key_count.attr,
	&dev_attr_key_at_index.attr,
	&dev_attr_key_at_index_name.attr,
	&dev_attr_key_at_index_type.attr,
	&dev_attr_key_at_index_data_length.attr,
	&dev_attr_key_at_index_data.attr,
	NULL
};

static const struct attribute_group key_enumeration_group =
	{ .attrs = key_enumeration_attributes };

/*
 * Macro defining SENSOR_DEVICE_ATTR for a fan sysfs entries.
 *  - show actual speed
 *  - show/store minimum speed
 *  - show maximum speed
 *  - show safe speed
 *  - show/store target speed
 *  - show/store manual mode
 */
#define sysfs_fan_speeds_offset(offset) \
static SENSOR_DEVICE_ATTR_2(fan##offset##_input, S_IRUGO, \
			applesmc_show_fan_speed, NULL, 0, offset-1); \
\
static SENSOR_DEVICE_ATTR_2(fan##offset##_min, S_IRUGO | S_IWUSR, \
	applesmc_show_fan_speed, applesmc_store_fan_speed, 1, offset-1); \
\
static SENSOR_DEVICE_ATTR_2(fan##offset##_max, S_IRUGO, \
			applesmc_show_fan_speed, NULL, 2, offset-1); \
\
static SENSOR_DEVICE_ATTR_2(fan##offset##_safe, S_IRUGO, \
			applesmc_show_fan_speed, NULL, 3, offset-1); \
\
static SENSOR_DEVICE_ATTR_2(fan##offset##_output, S_IRUGO | S_IWUSR, \
	applesmc_show_fan_speed, applesmc_store_fan_speed, 4, offset-1); \
\
static SENSOR_DEVICE_ATTR(fan##offset##_manual, S_IRUGO | S_IWUSR, \
	applesmc_show_fan_manual, applesmc_store_fan_manual, offset-1); \
\
1097
static SENSOR_DEVICE_ATTR(fan##offset##_label, S_IRUGO, \
1098
1099
1100
1101
1102
1103
1104
1105
1106
	applesmc_show_fan_position, NULL, offset-1); \
\
static struct attribute *fan##offset##_attributes[] = { \
	&sensor_dev_attr_fan##offset##_input.dev_attr.attr, \
	&sensor_dev_attr_fan##offset##_min.dev_attr.attr, \
	&sensor_dev_attr_fan##offset##_max.dev_attr.attr, \
	&sensor_dev_attr_fan##offset##_safe.dev_attr.attr, \
	&sensor_dev_attr_fan##offset##_output.dev_attr.attr, \
	&sensor_dev_attr_fan##offset##_manual.dev_attr.attr, \
1107
	&sensor_dev_attr_fan##offset##_label.dev_attr.attr, \
1108
1109
1110
1111
1112
	NULL \
};

/*
 * Create the needed functions for each fan using the macro defined above
1113
 * (4 fans are supported)
1114
1115
1116
 */
sysfs_fan_speeds_offset(1);
sysfs_fan_speeds_offset(2);
1117
1118
sysfs_fan_speeds_offset(3);
sysfs_fan_speeds_offset(4);
1119
1120
1121

static const struct attribute_group fan_attribute_groups[] = {
	{ .attrs = fan1_attributes },
1122
1123
1124
	{ .attrs = fan2_attributes },
	{ .attrs = fan3_attributes },
	{ .attrs = fan4_attributes },
1125
1126
1127
1128
1129
1130
1131
1132
1133
1134
1135
1136
1137
1138
1139
1140
1141
1142
1143
1144
1145
1146
1147
1148
1149
1150
1151
1152
1153
};

/*
 * Temperature sensors sysfs entries.
 */
static SENSOR_DEVICE_ATTR(temp1_input, S_IRUGO,
					applesmc_show_temperature, NULL, 0);
static SENSOR_DEVICE_ATTR(temp2_input, S_IRUGO,
					applesmc_show_temperature, NULL, 1);
static SENSOR_DEVICE_ATTR(temp3_input, S_IRUGO,
					applesmc_show_temperature, NULL, 2);
static SENSOR_DEVICE_ATTR(temp4_input, S_IRUGO,
					applesmc_show_temperature, NULL, 3);
static SENSOR_DEVICE_ATTR(temp5_input, S_IRUGO,
					applesmc_show_temperature, NULL, 4);
static SENSOR_DEVICE_ATTR(temp6_input, S_IRUGO,
					applesmc_show_temperature, NULL, 5);
static SENSOR_DEVICE_ATTR(temp7_input, S_IRUGO,
					applesmc_show_temperature, NULL, 6);
static SENSOR_DEVICE_ATTR(temp8_input, S_IRUGO,
					applesmc_show_temperature, NULL, 7);
static SENSOR_DEVICE_ATTR(temp9_input, S_IRUGO,
					applesmc_show_temperature, NULL, 8);
static SENSOR_DEVICE_ATTR(temp10_input, S_IRUGO,
					applesmc_show_temperature, NULL, 9);
static SENSOR_DEVICE_ATTR(temp11_input, S_IRUGO,
					applesmc_show_temperature, NULL, 10);
static SENSOR_DEVICE_ATTR(temp12_input, S_IRUGO,
					applesmc_show_temperature, NULL, 11);
1154
1155
1156
1157
1158
1159
1160
1161
1162
1163
1164
1165
1166
1167
1168
1169
1170
1171
1172
1173
1174
1175
1176
1177
1178
1179
1180
1181
1182
1183
1184
1185
1186
1187
1188
1189
1190
1191
1192
1193
1194
1195
1196
1197
1198
1199
static SENSOR_DEVICE_ATTR(temp13_input, S_IRUGO,
					applesmc_show_temperature, NULL, 12);
static SENSOR_DEVICE_ATTR(temp14_input, S_IRUGO,
					applesmc_show_temperature, NULL, 13);
static SENSOR_DEVICE_ATTR(temp15_input, S_IRUGO,
					applesmc_show_temperature, NULL, 14);
static SENSOR_DEVICE_ATTR(temp16_input, S_IRUGO,
					applesmc_show_temperature, NULL, 15);
static SENSOR_DEVICE_ATTR(temp17_input, S_IRUGO,
					applesmc_show_temperature, NULL, 16);
static SENSOR_DEVICE_ATTR(temp18_input, S_IRUGO,
					applesmc_show_temperature, NULL, 17);
static SENSOR_DEVICE_ATTR(temp19_input, S_IRUGO,
					applesmc_show_temperature, NULL, 18);
static SENSOR_DEVICE_ATTR(temp20_input, S_IRUGO,
					applesmc_show_temperature, NULL, 19);
static SENSOR_DEVICE_ATTR(temp21_input, S_IRUGO,
					applesmc_show_temperature, NULL, 20);
static SENSOR_DEVICE_ATTR(temp22_input, S_IRUGO,
					applesmc_show_temperature, NULL, 21);
static SENSOR_DEVICE_ATTR(temp23_input, S_IRUGO,
					applesmc_show_temperature, NULL, 22);
static SENSOR_DEVICE_ATTR(temp24_input, S_IRUGO,
					applesmc_show_temperature, NULL, 23);
static SENSOR_DEVICE_ATTR(temp25_input, S_IRUGO,
					applesmc_show_temperature, NULL, 24);
static SENSOR_DEVICE_ATTR(temp26_input, S_IRUGO,
					applesmc_show_temperature, NULL, 25);
static SENSOR_DEVICE_ATTR(temp27_input, S_IRUGO,
					applesmc_show_temperature, NULL, 26);
static SENSOR_DEVICE_ATTR(temp28_input, S_IRUGO,
					applesmc_show_temperature, NULL, 27);
static SENSOR_DEVICE_ATTR(temp29_input, S_IRUGO,
					applesmc_show_temperature, NULL, 28);
static SENSOR_DEVICE_ATTR(temp30_input, S_IRUGO,
					applesmc_show_temperature, NULL, 29);
static SENSOR_DEVICE_ATTR(temp31_input, S_IRUGO,
					applesmc_show_temperature, NULL, 30);
static SENSOR_DEVICE_ATTR(temp32_input, S_IRUGO,
					applesmc_show_temperature, NULL, 31);
static SENSOR_DEVICE_ATTR(temp33_input, S_IRUGO,
					applesmc_show_temperature, NULL, 32);
static SENSOR_DEVICE_ATTR(temp34_input, S_IRUGO,
					applesmc_show_temperature, NULL, 33);
static SENSOR_DEVICE_ATTR(temp35_input, S_IRUGO,
					applesmc_show_temperature, NULL, 34);
1200
1201
1202
1203
1204
1205
1206
1207
1208
1209
static SENSOR_DEVICE_ATTR(temp36_input, S_IRUGO,
					applesmc_show_temperature, NULL, 35);
static SENSOR_DEVICE_ATTR(temp37_input, S_IRUGO,
					applesmc_show_temperature, NULL, 36);
static SENSOR_DEVICE_ATTR(temp38_input, S_IRUGO,
					applesmc_show_temperature, NULL, 37);
static SENSOR_DEVICE_ATTR(temp39_input, S_IRUGO,
					applesmc_show_temperature, NULL, 38);
static SENSOR_DEVICE_ATTR(temp40_input, S_IRUGO,
					applesmc_show_temperature, NULL, 39);
1210
1211
1212
1213
1214
1215
1216
1217
1218
1219
1220
1221
1222
1223

static struct attribute *temperature_attributes[] = {
	&sensor_dev_attr_temp1_input.dev_attr.attr,
	&sensor_dev_attr_temp2_input.dev_attr.attr,
	&sensor_dev_attr_temp3_input.dev_attr.attr,
	&sensor_dev_attr_temp4_input.dev_attr.attr,
	&sensor_dev_attr_temp5_input.dev_attr.attr,
	&sensor_dev_attr_temp6_input.dev_attr.attr,
	&sensor_dev_attr_temp7_input.dev_attr.attr,
	&sensor_dev_attr_temp8_input.dev_attr.attr,
	&sensor_dev_attr_temp9_input.dev_attr.attr,
	&sensor_dev_attr_temp10_input.dev_attr.attr,
	&sensor_dev_attr_temp11_input.dev_attr.attr,
	&sensor_dev_attr_temp12_input.dev_attr.attr,
1224
1225
1226
1227
1228
1229
1230
1231
1232
1233
1234
1235
1236
1237
1238
1239
1240
1241
1242
1243
1244
1245
1246
	&sensor_dev_attr_temp13_input.dev_attr.attr,
	&sensor_dev_attr_temp14_input.dev_attr.attr,
	&sensor_dev_attr_temp15_input.dev_attr.attr,
	&sensor_dev_attr_temp16_input.dev_attr.attr,
	&sensor_dev_attr_temp17_input.dev_attr.attr,
	&sensor_dev_attr_temp18_input.dev_attr.attr,
	&sensor_dev_attr_temp19_input.dev_attr.attr,
	&sensor_dev_attr_temp20_input.dev_attr.attr,
	&sensor_dev_attr_temp21_input.dev_attr.attr,
	&sensor_dev_attr_temp22_input.dev_attr.attr,
	&sensor_dev_attr_temp23_input.dev_attr.attr,
	&sensor_dev_attr_temp24_input.dev_attr.attr,
	&sensor_dev_attr_temp25_input.dev_attr.attr,
	&sensor_dev_attr_temp26_input.dev_attr.attr,
	&sensor_dev_attr_temp27_input.dev_attr.attr,
	&sensor_dev_attr_temp28_input.dev_attr.attr,
	&sensor_dev_attr_temp29_input.dev_attr.attr,
	&sensor_dev_attr_temp30_input.dev_attr.attr,
	&sensor_dev_attr_temp31_input.dev_attr.attr,
	&sensor_dev_attr_temp32_input.dev_attr.attr,
	&sensor_dev_attr_temp33_input.dev_attr.attr,
	&sensor_dev_attr_temp34_input.dev_attr.attr,
	&sensor_dev_attr_temp35_input.dev_attr.attr,
1247
1248
1249
1250
1251
	&sensor_dev_attr_temp36_input.dev_attr.attr,
	&sensor_dev_attr_temp37_input.dev_attr.attr,
	&sensor_dev_attr_temp38_input.dev_attr.attr,
	&sensor_dev_attr_temp39_input.dev_attr.attr,
	&sensor_dev_attr_temp40_input.dev_attr.attr,
1252
1253
1254
1255
1256
1257
1258
1259
1260
1261
1262
	NULL
};

static const struct attribute_group temperature_attributes_group =
	{ .attrs = temperature_attributes };

/* Module stuff */

/*
 * applesmc_dmi_match - found a match.  return one, short-circuiting the hunt.
 */
1263
static int applesmc_dmi_match(const struct dmi_system_id *id)
1264
1265
1266
1267
1268
1269
1270
1271
1272
1273
1274
1275
1276
1277
1278
1279
1280
1281
1282
1283
1284
{
	int i = 0;
	struct dmi_match_data* dmi_data = id->driver_data;
	printk(KERN_INFO "applesmc: %s detected:\n", id->ident);
	applesmc_accelerometer = dmi_data->accelerometer;
	printk(KERN_INFO "applesmc:  - Model %s accelerometer\n",
				applesmc_accelerometer ? "with" : "without");
	applesmc_light = dmi_data->light;
	printk(KERN_INFO "applesmc:  - Model %s light sensors and backlight\n",
					applesmc_light ? "with" : "without");

	applesmc_temperature_set =  dmi_data->temperature_set;
	while (temperature_sensors_sets[applesmc_temperature_set][i] != NULL)
		i++;
	printk(KERN_INFO "applesmc:  - Model with %d temperature sensors\n", i);
	return 1;
}

/* Create accelerometer ressources */
static int applesmc_create_accelerometer(void)
{
1285
	struct input_dev *idev;
1286
1287
1288
1289
1290
1291
1292
	int ret;

	ret = sysfs_create_group(&pdev->dev.kobj,
					&accelerometer_attributes_group);
	if (ret)
		goto out;

1293
	applesmc_idev = input_allocate_polled_device();
1294
1295
1296
1297
1298
	if (!applesmc_idev) {
		ret = -ENOMEM;
		goto out_sysfs;
	}

1299
1300
1301
	applesmc_idev->poll = applesmc_idev_poll;
	applesmc_idev->poll_interval = APPLESMC_POLL_INTERVAL;

1302
1303
1304
	/* initial calibrate for the input device */
	applesmc_calibrate();

1305
1306
1307
1308
1309
	/* initialize the input device */
	idev = applesmc_idev->input;
	idev->name = "applesmc";
	idev->id.bustype = BUS_HOST;
	idev->dev.parent = &pdev->dev;
1310
	idev->evbit[0] = BIT_MASK(EV_ABS);
1311
	input_set_abs_params(idev, ABS_X,
1312
			-256, 256, APPLESMC_INPUT_FUZZ, APPLESMC_INPUT_FLAT);
1313
	input_set_abs_params(idev, ABS_Y,
1314
1315
			-256, 256, APPLESMC_INPUT_FUZZ, APPLESMC_INPUT_FLAT);

1316
	ret = input_register_polled_device(applesmc_idev);
1317
1318
1319
1320
1321
1322
	if (ret)
		goto out_idev;

	return 0;

out_idev:
1323
	input_free_polled_device(applesmc_idev);
1324
1325
1326
1327
1328
1329
1330
1331
1332
1333
1334
1335

out_sysfs:
	sysfs_remove_group(&pdev->dev.kobj, &accelerometer_attributes_group);

out:
	printk(KERN_WARNING "applesmc: driver init failed (ret=%d)!\n", ret);
	return ret;
}

/* Release all ressources used by the accelerometer */
static void applesmc_release_accelerometer(void)
{
1336
1337
	input_unregister_polled_device(applesmc_idev);
	input_free_polled_device(applesmc_idev);
1338
1339
1340
1341
1342
1343
	sysfs_remove_group(&pdev->dev.kobj, &accelerometer_attributes_group);
}

static __initdata struct dmi_match_data applesmc_dmi_data[] = {
/* MacBook Pro: accelerometer, backlight and temperature set 0 */
	{ .accelerometer = 1, .light = 1, .temperature_set = 0 },
1344
/* MacBook2: accelerometer and temperature set 1 */
1345
	{ .accelerometer = 1, .light = 0, .temperature_set = 1 },
1346
1347
1348
/* MacBook: accelerometer and temperature set 2 */
	{ .accelerometer = 1, .light = 0, .temperature_set = 2 },
/* MacMini: temperature set 3 */
1349
	{ .accelerometer = 0, .light = 0, .temperature_set = 3 },
1350
1351
/* MacPro: temperature set 4 */
	{ .accelerometer = 0, .light = 0, .temperature_set = 4 },
1352
1353
/* iMac: temperature set 5 */
	{ .accelerometer = 0, .light = 0, .temperature_set = 5 },
1354
/* MacBook3, MacBook4: accelerometer and temperature set 6 */
1355
	{ .accelerometer = 1, .light = 0, .temperature_set = 6 },
1356
1357
/* MacBook Air: accelerometer, backlight and temperature set 7 */
	{ .accelerometer = 1, .light = 1, .temperature_set = 7 },
1358
1359
/* MacBook Pro 4: accelerometer, backlight and temperature set 8 */
	{ .accelerometer = 1, .light = 1, .temperature_set = 8 },
1360
1361
/* MacBook Pro 3: accelerometer, backlight and temperature set 9 */
	{ .accelerometer = 1, .light = 1, .temperature_set = 9 },
1362
1363
/* iMac 5: light sensor only, temperature set 10 */
	{ .accelerometer = 0, .light = 0, .temperature_set = 10 },
1364
1365
/* MacBook 5: accelerometer, backlight and temperature set 11 */
	{ .accelerometer = 1, .light = 1, .temperature_set = 11 },
1366
1367
/* MacBook Pro 5: accelerometer, backlight and temperature set 12 */
	{ .accelerometer = 1, .light = 1, .temperature_set = 12 },
1368
1369
/* iMac 8: light sensor only, temperature set 13 */
	{ .accelerometer = 0, .light = 0, .temperature_set = 13 },
1370
1371
/* iMac 6: light sensor only, temperature set 14 */
	{ .accelerometer = 0, .light = 0, .temperature_set = 14 },
1372
1373
/* MacBook Air 2,1: accelerometer, backlight and temperature set 15 */
	{ .accelerometer = 1, .light = 1, .temperature_set = 15 },
1374
1375
/* MacPro3,1: temperature set 16 */
	{ .accelerometer = 0, .light = 0, .temperature_set = 16 },
1376
1377
1378
1379
/* iMac 9,1: light sensor only, temperature set 17 */
	{ .accelerometer = 0, .light = 0, .temperature_set = 17 },
/* MacBook Pro 2,2: accelerometer, backlight and temperature set 18 */
	{ .accelerometer = 1, .light = 1, .temperature_set = 18 },
1380
1381
1382
1383
/* MacBook Pro 5,3: accelerometer, backlight and temperature set 19 */
	{ .accelerometer = 1, .light = 1, .temperature_set = 19 },
/* MacBook Pro 5,4: accelerometer, backlight and temperature set 20 */
	{ .accelerometer = 1, .light = 1, .temperature_set = 20 },
1384
1385
/* MacBook Pro 6,2: accelerometer, backlight and temperature set 21 */
	{ .accelerometer = 1, .light = 1, .temperature_set = 21 },
1386
1387
/* MacBook Pro 7,1: accelerometer, backlight and temperature set 22 */
	{ .accelerometer = 1, .light = 1, .temperature_set = 22 },
1388
1389
1390
1391
1392
};

/* Note that DMI_MATCH(...,"MacBook") will match "MacBookPro1,1".
 * So we need to put "Apple MacBook Pro" before "Apple MacBook". */
static __initdata struct dmi_system_id applesmc_whitelist[] = {
1393
1394
1395
1396
	{ applesmc_dmi_match, "Apple MacBook Air 2", {
	  DMI_MATCH(DMI_BOARD_VENDOR, "Apple"),
	  DMI_MATCH(DMI_PRODUCT_NAME, "MacBookAir2") },
		&applesmc_dmi_data[15]},
1397
1398
1399
	{ applesmc_dmi_match, "Apple MacBook Air", {
	  DMI_MATCH(DMI_BOARD_VENDOR, "Apple"),
	  DMI_MATCH(DMI_PRODUCT_NAME, "MacBookAir") },
1400
		&applesmc_dmi_data[7]},
1401
1402
1403
1404
	{ applesmc_dmi_match, "Apple MacBook Pro 7", {
	  DMI_MATCH(DMI_BOARD_VENDOR, "Apple"),
	  DMI_MATCH(DMI_PRODUCT_NAME, "MacBookPro7") },
		&applesmc_dmi_data[22]},
1405
1406
1407
1408
1409
1410
1411
1412
	{ applesmc_dmi_match, "Apple MacBook Pro 5,4", {
	  DMI_MATCH(DMI_BOARD_VENDOR, "Apple"),
	  DMI_MATCH(DMI_PRODUCT_NAME, "MacBookPro5,4") },
		&applesmc_dmi_data[20]},
	{ applesmc_dmi_match, "Apple MacBook Pro 5,3", {
	  DMI_MATCH(DMI_BOARD_VENDOR, "Apple"),
	  DMI_MATCH(DMI_PRODUCT_NAME, "MacBookPro5,3") },
		&applesmc_dmi_data[19]},
1413
1414
1415
1416
	{ applesmc_dmi_match, "Apple MacBook Pro 6", {
	  DMI_MATCH(DMI_BOARD_VENDOR, "Apple"),
	  DMI_MATCH(DMI_PRODUCT_NAME, "MacBookPro6") },
		&applesmc_dmi_data[21]},
1417
1418
1419
1420
	{ applesmc_dmi_match, "Apple MacBook Pro 5", {
	  DMI_MATCH(DMI_BOARD_VENDOR, "Apple"),
	  DMI_MATCH(DMI_PRODUCT_NAME, "MacBookPro5") },
		&applesmc_dmi_data[12]},
1421
1422
1423
1424
	{ applesmc_dmi_match, "Apple MacBook Pro 4", {
	  DMI_MATCH(DMI_BOARD_VENDOR, "Apple"),
	  DMI_MATCH(DMI_PRODUCT_NAME, "MacBookPro4") },
		&applesmc_dmi_data[8]},
1425
1426
1427
1428
	{ applesmc_dmi_match, "Apple MacBook Pro 3", {
	  DMI_MATCH(DMI_BOARD_VENDOR, "Apple"),
	  DMI_MATCH(DMI_PRODUCT_NAME, "MacBookPro3") },
		&applesmc_dmi_data[9]},
1429
1430
1431
1432
	{ applesmc_dmi_match, "Apple MacBook Pro 2,2", {
	  DMI_MATCH(DMI_BOARD_VENDOR, "Apple Computer, Inc."),
	  DMI_MATCH(DMI_PRODUCT_NAME, "MacBookPro2,2") },
		&applesmc_dmi_data[18]},
1433
1434
1435
	{ applesmc_dmi_match, "Apple MacBook Pro", {
	  DMI_MATCH(DMI_BOARD_VENDOR,"Apple"),
	  DMI_MATCH(DMI_PRODUCT_NAME,"MacBookPro") },
1436
		&applesmc_dmi_data[0]},
1437
	{ applesmc_dmi_match, "Apple MacBook (v2)", {
1438
	  DMI_MATCH(DMI_BOARD_VENDOR,"Apple"),
1439
	  DMI_MATCH(DMI_PRODUCT_NAME,"MacBook2") },
1440
		&applesmc_dmi_data[1]},
1441
1442
1443
	{ applesmc_dmi_match, "Apple MacBook (v3)", {
	  DMI_MATCH(DMI_BOARD_VENDOR,"Apple"),
	  DMI_MATCH(DMI_PRODUCT_NAME,"MacBook3") },
1444
		&applesmc_dmi_data[6]},
1445
1446
1447
1448
	{ applesmc_dmi_match, "Apple MacBook 4", {
	  DMI_MATCH(DMI_BOARD_VENDOR, "Apple"),
	  DMI_MATCH(DMI_PRODUCT_NAME, "MacBook4") },
		&applesmc_dmi_data[6]},
1449
1450
1451
1452
	{ applesmc_dmi_match, "Apple MacBook 5", {
	  DMI_MATCH(DMI_BOARD_VENDOR, "Apple"),
	  DMI_MATCH(DMI_PRODUCT_NAME, "MacBook5") },
		&applesmc_dmi_data[11]},
1453
1454
1455
	{ applesmc_dmi_match, "Apple MacBook", {
	  DMI_MATCH(DMI_BOARD_VENDOR,"Apple"),
	  DMI_MATCH(DMI_PRODUCT_NAME,"MacBook") },
1456
		&applesmc_dmi_data[2]},
1457
1458
1459
	{ applesmc_dmi_match, "Apple Macmini", {
	  DMI_MATCH(DMI_BOARD_VENDOR,"Apple"),
	  DMI_MATCH(DMI_PRODUCT_NAME,"Macmini") },
1460
		&applesmc_dmi_data[3]},
1461
1462
1463
	{ applesmc_dmi_match, "Apple MacPro2", {
	  DMI_MATCH(DMI_BOARD_VENDOR,"Apple"),
	  DMI_MATCH(DMI_PRODUCT_NAME,"MacPro2") },
1464
		&applesmc_dmi_data[4]},
1465
1466
1467
1468
	{ applesmc_dmi_match, "Apple MacPro3", {
	  DMI_MATCH(DMI_BOARD_VENDOR, "Apple"),
	  DMI_MATCH(DMI_PRODUCT_NAME, "MacPro3") },
		&applesmc_dmi_data[16]},
1469
1470
1471
1472
	{ applesmc_dmi_match, "Apple MacPro", {
	  DMI_MATCH(DMI_BOARD_VENDOR, "Apple"),
	  DMI_MATCH(DMI_PRODUCT_NAME, "MacPro") },
		&applesmc_dmi_data[4]},
1473
1474
1475
1476
	{ applesmc_dmi_match, "Apple iMac 9,1", {
	  DMI_MATCH(DMI_BOARD_VENDOR, "Apple Inc."),
	  DMI_MATCH(DMI_PRODUCT_NAME, "iMac9,1") },
		&applesmc_dmi_data[17]},
1477
1478
1479
1480
	{ applesmc_dmi_match, "Apple iMac 8", {
	  DMI_MATCH(DMI_BOARD_VENDOR, "Apple"),
	  DMI_MATCH(DMI_PRODUCT_NAME, "iMac8") },
		&applesmc_dmi_data[13]},
1481
1482
1483
1484
	{ applesmc_dmi_match, "Apple iMac 6", {
	  DMI_MATCH(DMI_BOARD_VENDOR, "Apple"),
	  DMI_MATCH(DMI_PRODUCT_NAME, "iMac6") },
		&applesmc_dmi_data[14]},
1485
1486
1487
1488
	{ applesmc_dmi_match, "Apple iMac 5", {
	  DMI_MATCH(DMI_BOARD_VENDOR, "Apple"),
	  DMI_MATCH(DMI_PRODUCT_NAME, "iMac5") },
		&applesmc_dmi_data[10]},
1489
1490
1491
	{ applesmc_dmi_match, "Apple iMac", {
	  DMI_MATCH(DMI_BOARD_VENDOR,"Apple"),
	  DMI_MATCH(DMI_PRODUCT_NAME,"iMac") },
1492
		&applesmc_dmi_data[5]},
1493
1494
1495
1496
1497
1498
1499
1500
1501
1502
1503
1504
1505
1506
1507
1508
1509
1510
1511
1512
1513
1514
1515
1516
1517
	{ .ident = NULL }
};

static int __init applesmc_init(void)
{
	int ret;
	int count;
	int i;

	if (!dmi_check_system(applesmc_whitelist)) {
		printk(KERN_WARNING "applesmc: supported laptop not found!\n");
		ret = -ENODEV;
		goto out;
	}

	if (!request_region(APPLESMC_DATA_PORT, APPLESMC_NR_PORTS,
								"applesmc")) {
		ret = -ENXIO;
		goto out;
	}

	ret = platform_driver_register(&applesmc_driver);
	if (ret)
		goto out_region;

1518
1519
	pdev = platform_device_register_simple("applesmc", APPLESMC_DATA_PORT,
					       NULL, 0);
1520
1521
1522
1523
1524
	if (IS_ERR(pdev)) {
		ret = PTR_ERR(pdev);
		goto out_driver;
	}

1525
	ret = sysfs_create_file(&pdev->dev.kobj, &dev_attr_name.attr);
1526
1527
	if (ret)
		goto out_device;
1528

1529
1530
1531
	/* Create key enumeration sysfs files */
	ret = sysfs_create_group(&pdev->dev.kobj, &key_enumeration_group);
	if (ret)
1532
		goto out_name;
1533
1534
1535

	/* create fan files */
	count = applesmc_get_fan_count();
1536
	if (count < 0)
1537
		printk(KERN_ERR "applesmc: Cannot get the number of fans.\n");
1538
	else
1539
1540
		printk(KERN_INFO "applesmc: %d fans found.\n", count);

1541
1542
1543
1544
1545
1546
1547
1548
1549
1550
1551
1552
1553
	if (count > 4) {
		count = 4;
		printk(KERN_WARNING "applesmc: More than 4 fans found,"
		       " but at most 4 fans are supported"
		       " by the driver.\n");
	}

	while (fans_handled < count) {
		ret = sysfs_create_group(&pdev->dev.kobj,
					 &fan_attribute_groups[fans_handled]);
		if (ret)
			goto out_fans;
		fans_handled++;
1554
1555
1556
1557
1558
1559
1560
1561
1562
1563
1564
1565
1566
1567
1568
1569
1570
1571
1572
1573
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1575
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1579
1580
1581
1582
1583
1584
1585
1586
1587
1588
1589
1590
1591
1592
1593
1594
1595
1596
1597
	}

	for (i = 0;
	     temperature_sensors_sets[applesmc_temperature_set][i] != NULL;
	     i++) {
		if (temperature_attributes[i] == NULL) {
			printk(KERN_ERR "applesmc: More temperature sensors "
				"in temperature_sensors_sets (at least %i)"
				"than available sysfs files in "
				"temperature_attributes (%i), please report "
				"this bug.\n", i, i-1);
			goto out_temperature;
		}
		ret = sysfs_create_file(&pdev->dev.kobj,
						temperature_attributes[i]);
		if (ret)
			goto out_temperature;
	}

	if (applesmc_accelerometer) {
		ret = applesmc_create_accelerometer();
		if (ret)
			goto out_temperature;
	}

	if (applesmc_light) {
		/* Add light sensor file */
		ret = sysfs_create_file(&pdev->dev.kobj, &dev_attr_light.attr);
		if (ret)
			goto out_accelerometer;

		/* Create the workqueue */
		applesmc_led_wq = create_singlethread_workqueue("applesmc-led");
		if (!applesmc_led_wq) {
			ret = -ENOMEM;
			goto out_light_sysfs;
		}

		/* register as a led device */
		ret = led_classdev_register(&pdev->dev, &applesmc_backlight);
		if (ret < 0)
			goto out_light_wq;
	}

1598
1599
1600
	hwmon_dev = hwmon_device_register(&pdev->dev);
	if (IS_ERR(hwmon_dev)) {
		ret = PTR_ERR(hwmon_dev);
1601
1602
1603
1604
1605
1606
1607
1608
1609
1610
1611
1612
1613
1614
1615
1616
1617
1618
1619
1620
1621
		goto out_light_ledclass;
	}

	printk(KERN_INFO "applesmc: driver successfully loaded.\n");

	return 0;

out_light_ledclass:
	if (applesmc_light)
		led_classdev_unregister(&applesmc_backlight);
out_light_wq:
	if (applesmc_light)
		destroy_workqueue(applesmc_led_wq);
out_light_sysfs:
	if (applesmc_light)
		sysfs_remove_file(&pdev->dev.kobj, &dev_attr_light.attr);
out_accelerometer:
	if (applesmc_accelerometer)
		applesmc_release_accelerometer();
out_temperature:
	sysfs_remove_group(&pdev->dev.kobj, &temperature_attributes_group);
1622
1623
1624
1625
out_fans:
	while (fans_handled)
		sysfs_remove_group(&pdev->dev.kobj,
				   &fan_attribute_groups[--fans_handled]);
1626
	sysfs_remove_group(&pdev->dev.kobj, &key_enumeration_group);
1627
1628
out_name:
	sysfs_remove_file(&pdev->dev.kobj, &dev_attr_name.attr);
1629
1630
1631
1632
1633
1634
1635
1636
1637
1638
1639
1640
1641
out_device:
	platform_device_unregister(pdev);
out_driver:
	platform_driver_unregister(&applesmc_driver);
out_region:
	release_region(APPLESMC_DATA_PORT, APPLESMC_NR_PORTS);
out:
	printk(KERN_WARNING "applesmc: driver init failed (ret=%d)!\n", ret);
	return ret;
}

static void __exit applesmc_exit(void)
{
1642
	hwmon_device_unregister(hwmon_dev);
1643
1644
1645
1646
1647
1648
1649
1650
	if (applesmc_light) {
		led_classdev_unregister(&applesmc_backlight);
		destroy_workqueue(applesmc_led_wq);
		sysfs_remove_file(&pdev->dev.kobj, &dev_attr_light.attr);
	}
	if (applesmc_accelerometer)
		applesmc_release_accelerometer();
	sysfs_remove_group(&pdev->dev.kobj, &temperature_attributes_group);
1651
1652
1653
	while (fans_handled)
		sysfs_remove_group(&pdev->dev.kobj,
				   &fan_attribute_groups[--fans_handled]);
1654
	sysfs_remove_group(&pdev->dev.kobj, &key_enumeration_group);
1655
	sysfs_remove_file(&pdev->dev.kobj, &dev_attr_name.attr);
1656
1657
1658
1659
1660
1661
1662
1663
1664
1665
1666
1667
1668
	platform_device_unregister(pdev);
	platform_driver_unregister(&applesmc_driver);
	release_region(APPLESMC_DATA_PORT, APPLESMC_NR_PORTS);

	printk(KERN_INFO "applesmc: driver unloaded.\n");
}

module_init(applesmc_init);
module_exit(applesmc_exit);

MODULE_AUTHOR("Nicolas Boichat");
MODULE_DESCRIPTION("Apple SMC");
MODULE_LICENSE("GPL v2");
1669
MODULE_DEVICE_TABLE(dmi, applesmc_whitelist);