sony-laptop.c

linux 内核源代码

/*
 * ACPI Sony Notebook Control Driver (SNC and SPIC)
 *
 * Copyright (C) 2004-2005 Stelian Pop <[e-mail]>
 * Copyright (C) 2007 Mattia Dongili <[e-mail]>
 *
 * Parts of this driver inspired from asus_acpi.c and ibm_acpi.c
 * which are copyrighted by their respective authors.
 *
 * The SNY6001 driver part is based on the sonypi driver which includes
 * material from:
 *
 * Copyright (C) 2001-2005 Stelian Pop <[e-mail]>
 *
 * Copyright (C) 2005 Narayanan R S <[e-mail]>
 *
 * Copyright (C) 2001-2002 Alcôve <www.alcove.com>
 *
 * Copyright (C) 2001 Michael Ashley <[e-mail]>
 *
 * Copyright (C) 2001 Junichi Morita <[e-mail]>
 *
 * Copyright (C) 2000 Takaya Kinjo <[e-mail]>
 *
 * Copyright (C) 2000 Andrew Tridgell <[e-mail]>
 *
 * Earlier work by Werner Almesberger, Paul `Rusty' Russell and Paul Mackerras.
 *
 * This program is free software; you can redistribute it and/or modify
 * it under the terms of the GNU General Public License as published by
 * the Free Software Foundation; either version 2 of the License, or
 * (at your option) any later version.
 *
 * 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., 675 Mass Ave, Cambridge, MA 02139, USA.
 *
 */

#include <linux/kernel.h>
#include <linux/module.h>
#include <linux/moduleparam.h>
#include <linux/init.h>
#include <linux/types.h>
#include <linux/backlight.h>
#include <linux/platform_device.h>
#include <linux/err.h>
#include <linux/dmi.h>
#include <linux/pci.h>
#include <linux/interrupt.h>
#include <linux/delay.h>
#include <linux/input.h>
#include <linux/kfifo.h>
#include <linux/workqueue.h>
#include <linux/acpi.h>
#include <acpi/acpi_drivers.h>
#include <acpi/acpi_bus.h>
#include <asm/uaccess.h>
#include <linux/sonypi.h>
#include <linux/sony-laptop.h>
#ifdef CONFIG_SONYPI_COMPAT
#include <linux/poll.h>
#include <linux/miscdevice.h>
#endif

#define DRV_PFX			"sony-laptop: "
#define dprintk(msg...)		do {			\
	if (debug) printk(KERN_WARNING DRV_PFX  msg);	\
} while (0)

#define SONY_LAPTOP_DRIVER_VERSION	"0.5"

#define SONY_NC_CLASS		"sony-nc"
#define SONY_NC_HID		"SNY5001"
#define SONY_NC_DRIVER_NAME	"Sony Notebook Control Driver"

#define SONY_PIC_CLASS		"sony-pic"
#define SONY_PIC_HID		"SNY6001"
#define SONY_PIC_DRIVER_NAME	"Sony Programmable IO Control Driver"

MODULE_AUTHOR("Stelian Pop, Mattia Dongili");
MODULE_DESCRIPTION("Sony laptop extras driver (SPIC and SNC ACPI device)");
MODULE_LICENSE("GPL");
MODULE_VERSION(SONY_LAPTOP_DRIVER_VERSION);

static int debug;
module_param(debug, int, 0);
MODULE_PARM_DESC(debug, "set this to 1 (and RTFM) if you want to help "
		 "the development of this driver");

static int no_spic;		/* = 0 */
module_param(no_spic, int, 0444);
MODULE_PARM_DESC(no_spic,
		 "set this if you don't want to enable the SPIC device");

static int compat;		/* = 0 */
module_param(compat, int, 0444);
MODULE_PARM_DESC(compat,
		 "set this if you want to enable backward compatibility mode");

static unsigned long mask = 0xffffffff;
module_param(mask, ulong, 0644);
MODULE_PARM_DESC(mask,
		 "set this to the mask of event you want to enable (see doc)");

static int camera;		/* = 0 */
module_param(camera, int, 0444);
MODULE_PARM_DESC(camera,
		 "set this to 1 to enable Motion Eye camera controls "
		 "(only use it if you have a C1VE or C1VN model)");

#ifdef CONFIG_SONYPI_COMPAT
static int minor = -1;
module_param(minor, int, 0);
MODULE_PARM_DESC(minor,
		 "minor number of the misc device for the SPIC compatibility code, "
		 "default is -1 (automatic)");
#endif

/*********** Input Devices ***********/

#define SONY_LAPTOP_BUF_SIZE	128
struct sony_laptop_input_s {
	atomic_t		users;
	struct input_dev	*jog_dev;
	struct input_dev	*key_dev;
	struct kfifo		*fifo;
	spinlock_t		fifo_lock;
	struct workqueue_struct	*wq;
};
static struct sony_laptop_input_s sony_laptop_input = {
	.users = ATOMIC_INIT(0),
};

struct sony_laptop_keypress {
	struct input_dev *dev;
	int key;
};

/* Correspondance table between sonypi events
 * and input layer indexes in the keymap
 */
static int sony_laptop_input_index[] = {
	-1,	/* no event */
	-1,	/* SONYPI_EVENT_JOGDIAL_DOWN */
	-1,	/* SONYPI_EVENT_JOGDIAL_UP */
	-1,	/* SONYPI_EVENT_JOGDIAL_DOWN_PRESSED */
	-1,	/* SONYPI_EVENT_JOGDIAL_UP_PRESSED */
	-1,	/* SONYPI_EVENT_JOGDIAL_PRESSED */
	-1,	/* SONYPI_EVENT_JOGDIAL_RELEASED */
	 0,	/* SONYPI_EVENT_CAPTURE_PRESSED */
	 1,	/* SONYPI_EVENT_CAPTURE_RELEASED */
	 2,	/* SONYPI_EVENT_CAPTURE_PARTIALPRESSED */
	 3,	/* SONYPI_EVENT_CAPTURE_PARTIALRELEASED */
	 4,	/* SONYPI_EVENT_FNKEY_ESC */
	 5,	/* SONYPI_EVENT_FNKEY_F1 */
	 6,	/* SONYPI_EVENT_FNKEY_F2 */
	 7,	/* SONYPI_EVENT_FNKEY_F3 */
	 8,	/* SONYPI_EVENT_FNKEY_F4 */
	 9,	/* SONYPI_EVENT_FNKEY_F5 */
	10,	/* SONYPI_EVENT_FNKEY_F6 */
	11,	/* SONYPI_EVENT_FNKEY_F7 */
	12,	/* SONYPI_EVENT_FNKEY_F8 */
	13,	/* SONYPI_EVENT_FNKEY_F9 */
	14,	/* SONYPI_EVENT_FNKEY_F10 */
	15,	/* SONYPI_EVENT_FNKEY_F11 */
	16,	/* SONYPI_EVENT_FNKEY_F12 */
	17,	/* SONYPI_EVENT_FNKEY_1 */
	18,	/* SONYPI_EVENT_FNKEY_2 */
	19,	/* SONYPI_EVENT_FNKEY_D */
	20,	/* SONYPI_EVENT_FNKEY_E */
	21,	/* SONYPI_EVENT_FNKEY_F */
	22,	/* SONYPI_EVENT_FNKEY_S */
	23,	/* SONYPI_EVENT_FNKEY_B */
	24,	/* SONYPI_EVENT_BLUETOOTH_PRESSED */
	25,	/* SONYPI_EVENT_PKEY_P1 */
	26,	/* SONYPI_EVENT_PKEY_P2 */
	27,	/* SONYPI_EVENT_PKEY_P3 */
	28,	/* SONYPI_EVENT_BACK_PRESSED */
	-1,	/* SONYPI_EVENT_LID_CLOSED */
	-1,	/* SONYPI_EVENT_LID_OPENED */
	29,	/* SONYPI_EVENT_BLUETOOTH_ON */
	30,	/* SONYPI_EVENT_BLUETOOTH_OFF */
	31,	/* SONYPI_EVENT_HELP_PRESSED */
	32,	/* SONYPI_EVENT_FNKEY_ONLY */
	33,	/* SONYPI_EVENT_JOGDIAL_FAST_DOWN */
	34,	/* SONYPI_EVENT_JOGDIAL_FAST_UP */
	35,	/* SONYPI_EVENT_JOGDIAL_FAST_DOWN_PRESSED */
	36,	/* SONYPI_EVENT_JOGDIAL_FAST_UP_PRESSED */
	37,	/* SONYPI_EVENT_JOGDIAL_VFAST_DOWN */
	38,	/* SONYPI_EVENT_JOGDIAL_VFAST_UP */
	39,	/* SONYPI_EVENT_JOGDIAL_VFAST_DOWN_PRESSED */
	40,	/* SONYPI_EVENT_JOGDIAL_VFAST_UP_PRESSED */
	41,	/* SONYPI_EVENT_ZOOM_PRESSED */
	42,	/* SONYPI_EVENT_THUMBPHRASE_PRESSED */
	43,	/* SONYPI_EVENT_MEYE_FACE */
	44,	/* SONYPI_EVENT_MEYE_OPPOSITE */
	45,	/* SONYPI_EVENT_MEMORYSTICK_INSERT */
	46,	/* SONYPI_EVENT_MEMORYSTICK_EJECT */
	-1,	/* SONYPI_EVENT_ANYBUTTON_RELEASED */
	-1,	/* SONYPI_EVENT_BATTERY_INSERT */
	-1,	/* SONYPI_EVENT_BATTERY_REMOVE */
	-1,	/* SONYPI_EVENT_FNKEY_RELEASED */
	47,	/* SONYPI_EVENT_WIRELESS_ON */
	48,	/* SONYPI_EVENT_WIRELESS_OFF */
};

static int sony_laptop_input_keycode_map[] = {
	KEY_CAMERA,	/*  0 SONYPI_EVENT_CAPTURE_PRESSED */
	KEY_RESERVED,	/*  1 SONYPI_EVENT_CAPTURE_RELEASED */
	KEY_RESERVED,	/*  2 SONYPI_EVENT_CAPTURE_PARTIALPRESSED */
	KEY_RESERVED,	/*  3 SONYPI_EVENT_CAPTURE_PARTIALRELEASED */
	KEY_FN_ESC,	/*  4 SONYPI_EVENT_FNKEY_ESC */
	KEY_FN_F1,	/*  5 SONYPI_EVENT_FNKEY_F1 */
	KEY_FN_F2,	/*  6 SONYPI_EVENT_FNKEY_F2 */
	KEY_FN_F3,	/*  7 SONYPI_EVENT_FNKEY_F3 */
	KEY_FN_F4,	/*  8 SONYPI_EVENT_FNKEY_F4 */
	KEY_FN_F5,	/*  9 SONYPI_EVENT_FNKEY_F5 */
	KEY_FN_F6,	/* 10 SONYPI_EVENT_FNKEY_F6 */
	KEY_FN_F7,	/* 11 SONYPI_EVENT_FNKEY_F7 */
	KEY_FN_F8,	/* 12 SONYPI_EVENT_FNKEY_F8 */
	KEY_FN_F9,	/* 13 SONYPI_EVENT_FNKEY_F9 */
	KEY_FN_F10,	/* 14 SONYPI_EVENT_FNKEY_F10 */
	KEY_FN_F11,	/* 15 SONYPI_EVENT_FNKEY_F11 */
	KEY_FN_F12,	/* 16 SONYPI_EVENT_FNKEY_F12 */
	KEY_FN_F1,	/* 17 SONYPI_EVENT_FNKEY_1 */
	KEY_FN_F2,	/* 18 SONYPI_EVENT_FNKEY_2 */
	KEY_FN_D,	/* 19 SONYPI_EVENT_FNKEY_D */
	KEY_FN_E,	/* 20 SONYPI_EVENT_FNKEY_E */
	KEY_FN_F,	/* 21 SONYPI_EVENT_FNKEY_F */
	KEY_FN_S,	/* 22 SONYPI_EVENT_FNKEY_S */
	KEY_FN_B,	/* 23 SONYPI_EVENT_FNKEY_B */
	KEY_BLUETOOTH,	/* 24 SONYPI_EVENT_BLUETOOTH_PRESSED */
	KEY_PROG1,	/* 25 SONYPI_EVENT_PKEY_P1 */
	KEY_PROG2,	/* 26 SONYPI_EVENT_PKEY_P2 */
	KEY_PROG3,	/* 27 SONYPI_EVENT_PKEY_P3 */
	KEY_BACK,	/* 28 SONYPI_EVENT_BACK_PRESSED */
	KEY_BLUETOOTH,	/* 29 SONYPI_EVENT_BLUETOOTH_ON */
	KEY_BLUETOOTH,	/* 30 SONYPI_EVENT_BLUETOOTH_OFF */
	KEY_HELP,	/* 31 SONYPI_EVENT_HELP_PRESSED */
	KEY_FN,		/* 32 SONYPI_EVENT_FNKEY_ONLY */
	KEY_RESERVED,	/* 33 SONYPI_EVENT_JOGDIAL_FAST_DOWN */
	KEY_RESERVED,	/* 34 SONYPI_EVENT_JOGDIAL_FAST_UP */
	KEY_RESERVED,	/* 35 SONYPI_EVENT_JOGDIAL_FAST_DOWN_PRESSED */
	KEY_RESERVED,	/* 36 SONYPI_EVENT_JOGDIAL_FAST_UP_PRESSED */
	KEY_RESERVED,	/* 37 SONYPI_EVENT_JOGDIAL_VFAST_DOWN */
	KEY_RESERVED,	/* 38 SONYPI_EVENT_JOGDIAL_VFAST_UP */
	KEY_RESERVED,	/* 39 SONYPI_EVENT_JOGDIAL_VFAST_DOWN_PRESSED */
	KEY_RESERVED,	/* 40 SONYPI_EVENT_JOGDIAL_VFAST_UP_PRESSED */
	KEY_ZOOM,	/* 41 SONYPI_EVENT_ZOOM_PRESSED */
	BTN_THUMB,	/* 42 SONYPI_EVENT_THUMBPHRASE_PRESSED */
	KEY_RESERVED,	/* 43 SONYPI_EVENT_MEYE_FACE */
	KEY_RESERVED,	/* 44 SONYPI_EVENT_MEYE_OPPOSITE */
	KEY_RESERVED,	/* 45 SONYPI_EVENT_MEMORYSTICK_INSERT */
	KEY_RESERVED,	/* 46 SONYPI_EVENT_MEMORYSTICK_EJECT */
	KEY_WLAN,	/* 47 SONYPI_EVENT_WIRELESS_ON */
	KEY_WLAN,	/* 48 SONYPI_EVENT_WIRELESS_OFF */
};

/* release buttons after a short delay if pressed */
static void do_sony_laptop_release_key(struct work_struct *work)
{
	struct sony_laptop_keypress kp;

	while (kfifo_get(sony_laptop_input.fifo, (unsigned char *)&kp,
			 sizeof(kp)) == sizeof(kp)) {
		msleep(10);
		input_report_key(kp.dev, kp.key, 0);
		input_sync(kp.dev);
	}
}
static DECLARE_WORK(sony_laptop_release_key_work,
		do_sony_laptop_release_key);

/* forward event to the input subsystem */
static void sony_laptop_report_input_event(u8 event)
{
	struct input_dev *jog_dev = sony_laptop_input.jog_dev;
	struct input_dev *key_dev = sony_laptop_input.key_dev;
	struct sony_laptop_keypress kp = { NULL };

	if (event == SONYPI_EVENT_FNKEY_RELEASED) {
		/* Nothing, not all VAIOs generate this event */
		return;
	}

	/* report events */
	switch (event) {
	/* jog_dev events */
	case SONYPI_EVENT_JOGDIAL_UP:
	case SONYPI_EVENT_JOGDIAL_UP_PRESSED:
		input_report_rel(jog_dev, REL_WHEEL, 1);
		input_sync(jog_dev);
		return;

	case SONYPI_EVENT_JOGDIAL_DOWN:
	case SONYPI_EVENT_JOGDIAL_DOWN_PRESSED:
		input_report_rel(jog_dev, REL_WHEEL, -1);
		input_sync(jog_dev);
		return;

	/* key_dev events */
	case SONYPI_EVENT_JOGDIAL_PRESSED:
		kp.key = BTN_MIDDLE;
		kp.dev = jog_dev;
		break;

	default:
		if (event > ARRAY_SIZE (sony_laptop_input_keycode_map)) {
			dprintk("sony_laptop_report_input_event, event not known: %d\n", event);
			break;
		}
		if (sony_laptop_input_index[event] != -1) {
			kp.key = sony_laptop_input_keycode_map[sony_laptop_input_index[event]];
			if (kp.key != KEY_UNKNOWN)
				kp.dev = key_dev;
		}
		break;
	}

	if (kp.dev) {
		input_report_key(kp.dev, kp.key, 1);
		/* we emit the scancode so we can always remap the key */
		input_event(kp.dev, EV_MSC, MSC_SCAN, event);
		input_sync(kp.dev);
		kfifo_put(sony_laptop_input.fifo,
			  (unsigned char *)&kp, sizeof(kp));

		if (!work_pending(&sony_laptop_release_key_work))
			queue_work(sony_laptop_input.wq,
					&sony_laptop_release_key_work);
	} else
		dprintk("unknown input event %.2x\n", event);
}

static int sony_laptop_setup_input(struct acpi_device *acpi_device)
{
	struct input_dev *jog_dev;
	struct input_dev *key_dev;
	int i;
	int error;

	/* don't run again if already initialized */
	if (atomic_add_return(1, &sony_laptop_input.users) > 1)
		return 0;

	/* kfifo */
	spin_lock_init(&sony_laptop_input.fifo_lock);
	sony_laptop_input.fifo =
		kfifo_alloc(SONY_LAPTOP_BUF_SIZE, GFP_KERNEL,
			    &sony_laptop_input.fifo_lock);
	if (IS_ERR(sony_laptop_input.fifo)) {
		printk(KERN_ERR DRV_PFX "kfifo_alloc failed\n");
		error = PTR_ERR(sony_laptop_input.fifo);
		goto err_dec_users;
	}

	/* init workqueue */
	sony_laptop_input.wq = create_singlethread_workqueue("sony-laptop");
	if (!sony_laptop_input.wq) {
		printk(KERN_ERR DRV_PFX
				"Unabe to create workqueue.\n");
		error = -ENXIO;
		goto err_free_kfifo;
	}

	/* input keys */
	key_dev = input_allocate_device();
	if (!key_dev) {
		error = -ENOMEM;
		goto err_destroy_wq;
	}

	key_dev->name = "Sony Vaio Keys";
	key_dev->id.bustype = BUS_ISA;
	key_dev->id.vendor = PCI_VENDOR_ID_SONY;
	key_dev->dev.parent = &acpi_device->dev;

	/* Initialize the Input Drivers: special keys */
	set_bit(EV_KEY, key_dev->evbit);
	set_bit(EV_MSC, key_dev->evbit);
	set_bit(MSC_SCAN, key_dev->mscbit);
	key_dev->keycodesize = sizeof(sony_laptop_input_keycode_map[0]);
	key_dev->keycodemax = ARRAY_SIZE(sony_laptop_input_keycode_map);
	key_dev->keycode = &sony_laptop_input_keycode_map;
	for (i = 0; i < ARRAY_SIZE(sony_laptop_input_keycode_map); i++) {
		if (sony_laptop_input_keycode_map[i] != KEY_RESERVED) {
			set_bit(sony_laptop_input_keycode_map[i],
				key_dev->keybit);
		}
	}

	error = input_register_device(key_dev);
	if (error)
		goto err_free_keydev;

	sony_laptop_input.key_dev = key_dev;

	/* jogdial */
	jog_dev = input_allocate_device();
	if (!jog_dev) {
		error = -ENOMEM;
		goto err_unregister_keydev;
	}

	jog_dev->name = "Sony Vaio Jogdial";
	jog_dev->id.bustype = BUS_ISA;
	jog_dev->id.vendor = PCI_VENDOR_ID_SONY;
	key_dev->dev.parent = &acpi_device->dev;

	jog_dev->evbit[0] = BIT_MASK(EV_KEY) | BIT_MASK(EV_REL);
	jog_dev->keybit[BIT_WORD(BTN_MOUSE)] = BIT_MASK(BTN_MIDDLE);
	jog_dev->relbit[0] = BIT_MASK(REL_WHEEL);

	error = input_register_device(jog_dev);
	if (error)
		goto err_free_jogdev;

	sony_laptop_input.jog_dev = jog_dev;

	return 0;

err_free_jogdev:
	input_free_device(jog_dev);

err_unregister_keydev:
	input_unregister_device(key_dev);
	/* to avoid kref underflow below at input_free_device */
	key_dev = NULL;

err_free_keydev:
	input_free_device(key_dev);

err_destroy_wq:
	destroy_workqueue(sony_laptop_input.wq);

err_free_kfifo:
	kfifo_free(sony_laptop_input.fifo);

err_dec_users:
	atomic_dec(&sony_laptop_input.users);
	return error;
}

static void sony_laptop_remove_input(void)
{
	/* cleanup only after the last user has gone */
	if (!atomic_dec_and_test(&sony_laptop_input.users))
		return;

	/* flush workqueue first */
	flush_workqueue(sony_laptop_input.wq);

	/* destroy input devs */
	input_unregister_device(sony_laptop_input.key_dev);
	sony_laptop_input.key_dev = NULL;

	if (sony_laptop_input.jog_dev) {
		input_unregister_device(sony_laptop_input.jog_dev);
		sony_laptop_input.jog_dev = NULL;
	}

	destroy_workqueue(sony_laptop_input.wq);
	kfifo_free(sony_laptop_input.fifo);
}

/*********** Platform Device ***********/

static atomic_t sony_pf_users = ATOMIC_INIT(0);
static struct platform_driver sony_pf_driver = {
	.driver = {
		   .name = "sony-laptop",
		   .owner = THIS_MODULE,
		   }
};
static struct platform_device *sony_pf_device;

static int sony_pf_add(void)
{
	int ret = 0;

	/* don't run again if already initialized */
	if (atomic_add_return(1, &sony_pf_users) > 1)