board-nokia770.c

LINUX 2.6.17.4的源码

/*
 * linux/arch/arm/mach-omap1/board-nokia770.c
 *
 * Modified from board-generic.c
 *
 * 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.
 */

#include <linux/kernel.h>
#include <linux/init.h>
#include <linux/platform_device.h>
#include <linux/input.h>
#include <linux/clk.h>

#include <linux/spi/spi.h>
#include <linux/spi/ads7846.h>

#include <asm/hardware.h>
#include <asm/mach-types.h>
#include <asm/mach/arch.h>
#include <asm/mach/map.h>

#include <asm/arch/gpio.h>
#include <asm/arch/mux.h>
#include <asm/arch/usb.h>
#include <asm/arch/board.h>
#include <asm/arch/keypad.h>
#include <asm/arch/common.h>
#include <asm/arch/dsp_common.h>
#include <asm/arch/aic23.h>
#include <asm/arch/gpio.h>

static void __init omap_nokia770_init_irq(void)
{
	/* On Nokia 770, the SleepX signal is masked with an
	 * MPUIO line by default.  It has to be unmasked for it
	 * to become functional */

	/* SleepX mask direction */
	omap_writew((omap_readw(0xfffb5008) & ~2), 0xfffb5008);
	/* Unmask SleepX signal */
	omap_writew((omap_readw(0xfffb5004) & ~2), 0xfffb5004);

	omap1_init_common_hw();
	omap_init_irq();
}

static int nokia770_keymap[] = {
	KEY(0, 1, GROUP_0 | KEY_UP),
	KEY(0, 2, GROUP_1 | KEY_F5),
	KEY(1, 0, GROUP_0 | KEY_LEFT),
	KEY(1, 1, GROUP_0 | KEY_ENTER),
	KEY(1, 2, GROUP_0 | KEY_RIGHT),
	KEY(2, 0, GROUP_1 | KEY_ESC),
	KEY(2, 1, GROUP_0 | KEY_DOWN),
	KEY(2, 2, GROUP_1 | KEY_F4),
	KEY(3, 0, GROUP_2 | KEY_F7),
	KEY(3, 1, GROUP_2 | KEY_F8),
	KEY(3, 2, GROUP_2 | KEY_F6),
	0
};

static struct resource nokia770_kp_resources[] = {
	[0] = {
		.start	= INT_KEYBOARD,
		.end	= INT_KEYBOARD,
		.flags	= IORESOURCE_IRQ,
	},
};

static struct omap_kp_platform_data nokia770_kp_data = {
	.rows   = 8,
	.cols   = 8,
	.keymap = nokia770_keymap
};

static struct platform_device nokia770_kp_device = {
	.name		= "omap-keypad",
	.id		= -1,
	.dev		= {
		.platform_data = &nokia770_kp_data,
	},
	.num_resources	= ARRAY_SIZE(nokia770_kp_resources),
	.resource	= nokia770_kp_resources,
};

static struct platform_device *nokia770_devices[] __initdata = {
        &nokia770_kp_device,
};

static struct ads7846_platform_data nokia770_ads7846_platform_data __initdata = {
	.x_max		= 0x0fff,
	.y_max		= 0x0fff,
	.x_plate_ohms	= 180,
	.pressure_max	= 255,
	.debounce_max	= 10,
	.debounce_tol	= 3,
};

static struct spi_board_info nokia770_spi_board_info[] __initdata = {
	[0] = {
		.modalias       = "lcd_lph8923",
		.bus_num        = 2,
		.chip_select    = 3,
		.max_speed_hz   = 12000000,
	},
	[1] = {
		.modalias       = "ads7846",
		.bus_num        = 2,
		.chip_select    = 0,
		.max_speed_hz   = 2500000,
		.irq		= OMAP_GPIO_IRQ(15),
		.platform_data	= &nokia770_ads7846_platform_data,
	},
};


/* assume no Mini-AB port */

static struct omap_usb_config nokia770_usb_config __initdata = {
	.otg		= 1,
	.register_host	= 1,
	.register_dev	= 1,
	.hmc_mode	= 16,
	.pins[0]	= 6,
};

static struct omap_mmc_config nokia770_mmc_config __initdata = {
	.mmc[0] = {
		.enabled	= 0,
		.wire4		= 0,
		.wp_pin		= -1,
		.power_pin	= -1,
		.switch_pin	= -1,
	},
	.mmc[1] = {
		.enabled	= 0,
		.wire4		= 0,
		.wp_pin		= -1,
		.power_pin	= -1,
		.switch_pin	= -1,
	},
};

static struct omap_board_config_kernel nokia770_config[] = {
	{ OMAP_TAG_USB,		NULL },
	{ OMAP_TAG_MMC,		&nokia770_mmc_config },
};

/*
 * audio power control
 */
#define	HEADPHONE_GPIO		14
#define	AMPLIFIER_CTRL_GPIO	58

static struct clk *dspxor_ck;
static DECLARE_MUTEX(audio_pwr_sem);
/*
 * audio_pwr_state
 * +--+-------------------------+---------------------------------------+
 * |-1|down			|power-up request -> 0			|
 * +--+-------------------------+---------------------------------------+
 * | 0|up			|power-down(1) request -> 1		|
 * |  |				|power-down(2) request -> (ignore)	|
 * +--+-------------------------+---------------------------------------+
 * | 1|up,			|power-up request -> 0			|
 * |  |received down(1) request	|power-down(2) request -> -1		|
 * +--+-------------------------+---------------------------------------+
 */
static int audio_pwr_state = -1;

/*
 * audio_pwr_up / down should be called under audio_pwr_sem
 */
static void nokia770_audio_pwr_up(void)
{
	clk_enable(dspxor_ck);

	/* Turn on codec */
	tlv320aic23_power_up();

	if (omap_get_gpio_datain(HEADPHONE_GPIO))
		/* HP not connected, turn on amplifier */
		omap_set_gpio_dataout(AMPLIFIER_CTRL_GPIO, 1);
	else
		/* HP connected, do not turn on amplifier */
		printk("HP connected\n");
}

static void codec_delayed_power_down(void *arg)
{
	down(&audio_pwr_sem);
	if (audio_pwr_state == -1)
		tlv320aic23_power_down();
	clk_disable(dspxor_ck);
	up(&audio_pwr_sem);
}

static DECLARE_WORK(codec_power_down_work, codec_delayed_power_down, NULL);

static void nokia770_audio_pwr_down(void)
{
	/* Turn off amplifier */
	omap_set_gpio_dataout(AMPLIFIER_CTRL_GPIO, 0);

	/* Turn off codec: schedule delayed work */
	schedule_delayed_work(&codec_power_down_work, HZ / 20);	/* 50ms */
}

void nokia770_audio_pwr_up_request(int stage)
{
	down(&audio_pwr_sem);
	if (audio_pwr_state == -1)
		nokia770_audio_pwr_up();
	/* force audio_pwr_state = 0, even if it was 1. */
	audio_pwr_state = 0;
	up(&audio_pwr_sem);
}

void nokia770_audio_pwr_down_request(int stage)
{
	down(&audio_pwr_sem);
	switch (stage) {
	case 1:
		if (audio_pwr_state == 0)
			audio_pwr_state = 1;
		break;
	case 2:
		if (audio_pwr_state == 1) {
			nokia770_audio_pwr_down();
			audio_pwr_state = -1;
		}
		break;
	}
	up(&audio_pwr_sem);
}

static void __init omap_nokia770_init(void)
{
	nokia770_config[0].data = &nokia770_usb_config;

	platform_add_devices(nokia770_devices, ARRAY_SIZE(nokia770_devices));
	spi_register_board_info(nokia770_spi_board_info,
				ARRAY_SIZE(nokia770_spi_board_info));
	omap_board_config = nokia770_config;
	omap_board_config_size = ARRAY_SIZE(nokia770_config);
	omap_serial_init();
	omap_dsp_audio_pwr_up_request = nokia770_audio_pwr_up_request;
	omap_dsp_audio_pwr_down_request = nokia770_audio_pwr_down_request;
	dspxor_ck = clk_get(0, "dspxor_ck");
}

static void __init omap_nokia770_map_io(void)
{
	omap1_map_common_io();
}

MACHINE_START(NOKIA770, "Nokia 770")
	.phys_io	= 0xfff00000,
	.io_pg_offst	= ((0xfef00000) >> 18) & 0xfffc,
	.boot_params	= 0x10000100,
	.map_io		= omap_nokia770_map_io,
	.init_irq	= omap_nokia770_init_irq,
	.init_machine	= omap_nokia770_init,
	.timer		= &omap_timer,
MACHINE_END