path: root/arch/arm/mach-tegra/board-cardhu-kbc.c

/*
 * arch/arm/mach-tegra/board-cardhu-kbc.c
 * Keys configuration for Nvidia tegra3 cardhu platform.
 *
 * Copyright (C) 2011 NVIDIA, Inc.
 *
 * This program is free software; you can redistribute it and/or modify
 * it under the terms of the GNU General Public License version 2 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., 59 Temple Place, Suite 330, Boston, MA
 * 02111-1307, USA
 */

#include <linux/kernel.h>
#include <linux/platform_device.h>
#include <linux/input.h>
#include <linux/device.h>
#include <linux/gpio.h>
#include <linux/gpio_keys.h>
#include <linux/gpio_scrollwheel.h>

#include <mach/irqs.h>
#include <mach/io.h>
#include <mach/iomap.h>
#include <mach/kbc.h>

#include "gpio-names.h"

#ifdef CONFIG_KEYBOARD_TEGRA
#ifdef CONFIG_INPUT_ALPS_GPIO_SCROLLWHEEL
#define CARDHU_ROW_COUNT	3
#define CARDHU_COL_COUNT	2
#else
#define CARDHU_ROW_COUNT	4
#define CARDHU_COL_COUNT	6
#endif

#ifdef CONFIG_INPUT_ALPS_GPIO_SCROLLWHEEL
static int plain_kbd_keycode[] = {
	KEY_POWER,	KEY_RESERVED,
	KEY_HOME,	KEY_BACK,
	KEY_RESERVED,	KEY_RESERVED,
};
#else
static int plain_kbd_keycode[] = {
	KEY_POWER,	KEY_RESERVED,	KEY_RESERVED,	KEY_RESERVED,
			KEY_RESERVED,	KEY_RESERVED,	KEY_RESERVED,
	KEY_HOME,	KEY_BACK,	KEY_RESERVED,	KEY_RESERVED,
			KEY_RESERVED,	KEY_RESERVED,	KEY_RESERVED,
	KEY_CAMERA,	KEY_CAMERA,	KEY_RESERVED,	KEY_RESERVED,
			KEY_RESERVED,	KEY_RESERVED,	KEY_RESERVED,
	KEY_VOLUMEDOWN,	KEY_VOLUMEUP,	KEY_RESERVED,	KEY_RESERVED,
			KEY_RESERVED,	KEY_RESERVED,	KEY_PAUSE,
	KEY_END,	KEY_BACK,	KEY_RESERVED,	KEY_RESERVED,
			KEY_RESERVED,	KEY_PLAY,	KEY_PHONE,
};
#endif
static struct tegra_kbc_wake_key cardhu_wake_cfg[] = {
	[0] = {
		.row = 0,
		.col = 0,
	},
};

static struct tegra_kbc_platform_data cardhu_kbc_platform_data = {
	.debounce_cnt = 20,
	.repeat_cnt = 50 * 32,
	.scan_timeout_cnt = 3000 * 32,
	.plain_keycode = plain_kbd_keycode,
	.fn_keycode = NULL,
	.is_filter_keys = false,
	.is_wake_on_any_key = false,
	.wake_key_cnt = 1,
	.wake_cfg = &cardhu_wake_cfg[0],
};

static struct resource cardhu_kbc_resources[] = {
	[0] = {
		.start = TEGRA_KBC_BASE,
		.end   = TEGRA_KBC_BASE + TEGRA_KBC_SIZE - 1,
		.flags = IORESOURCE_MEM,
	},
	[1] = {
		.start = INT_KBC,
		.end   = INT_KBC,
		.flags = IORESOURCE_IRQ,
	},
};


struct platform_device cardhu_kbc_device = {
	.name = "tegra-kbc",
	.id = -1,
	.dev = {
		.platform_data = &cardhu_kbc_platform_data,
	},
	.resource = cardhu_kbc_resources,
	.num_resources = ARRAY_SIZE(cardhu_kbc_resources),
};

int __init cardhu_kbc_init(void)
{
	struct tegra_kbc_platform_data *data = &cardhu_kbc_platform_data;
	int i;

	pr_info("KBC: cardhu_kbc_init\n");

	 /* Setup the pin configuration information. */
	for (i = 0; i < KBC_MAX_GPIO; i++) {
		data->pin_cfg[i].num = 0;
		data->pin_cfg[i].pin_type = kbc_pin_unused;
	}
	for (i = 0; i < CARDHU_ROW_COUNT; i++) {
		data->pin_cfg[i].num = i;
		data->pin_cfg[i].pin_type = kbc_pin_row;
	}

	for (i = 0; i < CARDHU_COL_COUNT; i++) {
		data->pin_cfg[i + CARDHU_ROW_COUNT].num = i;
		data->pin_cfg[i + CARDHU_ROW_COUNT].pin_type = kbc_pin_col;
	}
	platform_device_register(&cardhu_kbc_device);
	return 0;
}
#else
int __init cardhu_kbc_init(void)
{
}
#endif

#ifdef CONFIG_INPUT_ALPS_GPIO_SCROLLWHEEL
#define GPIO_SCROLL(_pinaction, _gpio, _desc)		\
{							\
	.pinaction = GPIO_SCROLLWHEEL_PIN_##_pinaction,	\
	.gpio = TEGRA_GPIO_##_gpio,			\
	.desc = _desc,					\
	.active_low = 1,				\
	.debounce_interval = 2,				\
}

static struct gpio_scrollwheel_button scroll_keys[] = {
	[0] = GPIO_SCROLL(ONOFF, PR3, "sw_onoff"),
	[1] = GPIO_SCROLL(PRESS, PQ5, "sw_press"),
	[2] = GPIO_SCROLL(ROT1, PQ3, "sw_rot1"),
	[3] = GPIO_SCROLL(ROT2, PQ4, "sw_rot2"),
};

static struct gpio_scrollwheel_platform_data cardhu_scroll_platform_data = {
	.buttons = scroll_keys,
	.nbuttons = ARRAY_SIZE(scroll_keys),
};

static struct platform_device cardhu_scroll_device = {
	.name	= "alps-gpio-scrollwheel",
	.id	= 0,
	.dev	= {
		.platform_data = &cardhu_scroll_platform_data,
	},
};

int __init cardhu_scroll_init(void)
{
	int i;
	/* Setting pins to gpio mode */
	for (i = 0; i < ARRAY_SIZE(scroll_keys); i++)
		tegra_gpio_enable(scroll_keys[i].gpio);

	platform_device_register(&cardhu_scroll_device);
	return 0;
}
#else
int __init cardhu_scroll_init(void)
{
	return 0;
}
#endif

#ifdef CONFIG_KEYBOARD_GPIO
#define GPIO_KEY(_id, _gpio, _iswake)		\
	{					\
		.code = _id,			\
		.gpio = TEGRA_GPIO_##_gpio,	\
		.active_low = 1,		\
		.desc = #_id,			\
		.type = EV_KEY,			\
		.wakeup = _iswake,		\
		.debounce_interval = 10,	\
	}

static struct gpio_keys_button cardhu_keys[] = {
	[0] = GPIO_KEY(KEY_HOME, PQ0, 0),
	[1] = GPIO_KEY(KEY_MENU, PQ1, 0),
	[2] = GPIO_KEY(KEY_SEARCH, PQ2, 0),
	[3] = GPIO_KEY(KEY_BACK, PQ3, 0),
	[4] = GPIO_KEY(KEY_VOLUMEUP, PR0, 0),
	[5] = GPIO_KEY(KEY_VOLUMEDOWN, PR1, 0),
	[6] = GPIO_KEY(KEY_POWER, PV0, 1),
};

static struct gpio_keys_platform_data cardhu_keys_platform_data = {
	.buttons	= cardhu_keys,
	.nbuttons       = ARRAY_SIZE(cardhu_keys),
};

static struct platform_device cardhu_keys_device = {
	.name   = "gpio-keys",
	.id     = 0,
	.dev    = {
		.platform_data  = &cardhu_keys_platform_data,
	},
};

int __init cardhu_keys_init(void)
{
	int i;
	int ret;

	/* Set KB_ROW2 to 0 for capcitive switch to be in scan mode */
	ret = gpio_request(TEGRA_GPIO_PR2, "cap_sw_sl_scan");
	if (ret < 0) {
		pr_err("%s: gpio_request failed #%d\n",
					__func__, TEGRA_GPIO_PR2);
		return ret;
	}
	ret = gpio_direction_output(TEGRA_GPIO_PR2, 0);
	if (ret < 0) {
		pr_err("%s: gpio_direction_output failed #%d\n",
					__func__, TEGRA_GPIO_PR2);
		gpio_free(TEGRA_GPIO_PR2);
		return ret;
	}

	tegra_gpio_enable(TEGRA_GPIO_PR2);

	/* Enable gpio mode for other pins */
	for (i = 0; i < ARRAY_SIZE(cardhu_keys); i++)
		tegra_gpio_enable(cardhu_keys[i].gpio);

	platform_device_register(&cardhu_keys_device);
	return 0;
}
#else
int __init cardhu_keys_init(void)
{
	return 0;
}
#endif