alistair23-linux/arch/arm/mach-omap2/board-am3517evm.c

/*
 * linux/arch/arm/mach-omap2/board-am3517evm.c
 *
 * Copyright (C) 2009 Texas Instruments Incorporated
 * Author: Ranjith Lohithakshan <ranjithl@ti.com>
 *
 * Based on mach-omap2/board-omap3evm.c
 *
 * 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 version 2.
 *
 * This program is distributed "as is" WITHOUT ANY WARRANTY of any kind,
 * whether express or implied; without even the implied warranty of
 * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the GNU
 * General Public License for more details.
 */

#include <linux/kernel.h>
#include <linux/init.h>
#include <linux/platform_device.h>
#include <linux/gpio.h>

#include <mach/hardware.h>
#include <mach/am35xx.h>
#include <asm/mach-types.h>
#include <asm/mach/arch.h>
#include <asm/mach/map.h>

#include <plat/board.h>
#include <plat/common.h>
#include <plat/usb.h>
#include <plat/display.h>

#include "mux.h"

#define LCD_PANEL_PWR		176
#define LCD_PANEL_BKLIGHT_PWR	182
#define LCD_PANEL_PWM		181

static int lcd_enabled;
static int dvi_enabled;

static void __init am3517_evm_display_init(void)
{
	int r;

	omap_mux_init_gpio(LCD_PANEL_PWR, OMAP_PIN_INPUT_PULLUP);
	omap_mux_init_gpio(LCD_PANEL_BKLIGHT_PWR, OMAP_PIN_INPUT_PULLDOWN);
	omap_mux_init_gpio(LCD_PANEL_PWM, OMAP_PIN_INPUT_PULLDOWN);
	/*
	 * Enable GPIO 182 = LCD Backlight Power
	 */
	r = gpio_request(LCD_PANEL_BKLIGHT_PWR, "lcd_backlight_pwr");
	if (r) {
		printk(KERN_ERR "failed to get lcd_backlight_pwr\n");
		return;
	}
	gpio_direction_output(LCD_PANEL_BKLIGHT_PWR, 1);
	/*
	 * Enable GPIO 181 = LCD Panel PWM
	 */
	r = gpio_request(LCD_PANEL_PWM, "lcd_pwm");
	if (r) {
		printk(KERN_ERR "failed to get lcd_pwm\n");
		goto err_1;
	}
	gpio_direction_output(LCD_PANEL_PWM, 1);
	/*
	 * Enable GPIO 176 = LCD Panel Power enable pin
	 */
	r = gpio_request(LCD_PANEL_PWR, "lcd_panel_pwr");
	if (r) {
		printk(KERN_ERR "failed to get lcd_panel_pwr\n");
		goto err_2;
	}
	gpio_direction_output(LCD_PANEL_PWR, 1);

	printk(KERN_INFO "Display initialized successfully\n");
	return;

err_2:
	gpio_free(LCD_PANEL_PWM);
err_1:
	gpio_free(LCD_PANEL_BKLIGHT_PWR);
}

static int am3517_evm_panel_enable_lcd(struct omap_dss_device *dssdev)
{
	if (dvi_enabled) {
		printk(KERN_ERR "cannot enable LCD, DVI is enabled\n");
		return -EINVAL;
	}
	gpio_set_value(LCD_PANEL_PWR, 1);
	lcd_enabled = 1;

	return 0;
}

static void am3517_evm_panel_disable_lcd(struct omap_dss_device *dssdev)
{
	gpio_set_value(LCD_PANEL_PWR, 0);
	lcd_enabled = 0;
}

static struct omap_dss_device am3517_evm_lcd_device = {
	.type			= OMAP_DISPLAY_TYPE_DPI,
	.name			= "lcd",
	.driver_name		= "sharp_lq_panel",
	.phy.dpi.data_lines 	= 16,
	.platform_enable	= am3517_evm_panel_enable_lcd,
	.platform_disable	= am3517_evm_panel_disable_lcd,
};

static int am3517_evm_panel_enable_tv(struct omap_dss_device *dssdev)
{
	return 0;
}

static void am3517_evm_panel_disable_tv(struct omap_dss_device *dssdev)
{
}

static struct omap_dss_device am3517_evm_tv_device = {
	.type 			= OMAP_DISPLAY_TYPE_VENC,
	.name 			= "tv",
	.driver_name		= "venc",
	.phy.venc.type		= OMAP_DSS_VENC_TYPE_SVIDEO,
	.platform_enable	= am3517_evm_panel_enable_tv,
	.platform_disable	= am3517_evm_panel_disable_tv,
};

static int am3517_evm_panel_enable_dvi(struct omap_dss_device *dssdev)
{
	if (lcd_enabled) {
		printk(KERN_ERR "cannot enable DVI, LCD is enabled\n");
		return -EINVAL;
	}
	dvi_enabled = 1;

	return 0;
}

static void am3517_evm_panel_disable_dvi(struct omap_dss_device *dssdev)
{
	dvi_enabled = 0;
}

static struct omap_dss_device am3517_evm_dvi_device = {
	.type			= OMAP_DISPLAY_TYPE_DPI,
	.name			= "dvi",
	.driver_name		= "generic_panel",
	.phy.dpi.data_lines	= 24,
	.platform_enable	= am3517_evm_panel_enable_dvi,
	.platform_disable	= am3517_evm_panel_disable_dvi,
};

static struct omap_dss_device *am3517_evm_dss_devices[] = {
	&am3517_evm_lcd_device,
	&am3517_evm_tv_device,
	&am3517_evm_dvi_device,
};

static struct omap_dss_board_info am3517_evm_dss_data = {
	.num_devices	= ARRAY_SIZE(am3517_evm_dss_devices),
	.devices	= am3517_evm_dss_devices,
	.default_device	= &am3517_evm_lcd_device,
};

struct platform_device am3517_evm_dss_device = {
	.name		= "omapdss",
	.id		= -1,
	.dev		= {
		.platform_data	= &am3517_evm_dss_data,
	},
};

/*
 * Board initialization
 */
static struct omap_board_config_kernel am3517_evm_config[] __initdata = {
};

static struct platform_device *am3517_evm_devices[] __initdata = {
	&am3517_evm_dss_device,
};

static void __init am3517_evm_init_irq(void)
{
	omap_board_config = am3517_evm_config;
	omap_board_config_size = ARRAY_SIZE(am3517_evm_config);

	omap2_init_common_hw(NULL, NULL);
	omap_init_irq();
	omap_gpio_init();
}

static struct ehci_hcd_omap_platform_data ehci_pdata __initdata = {
	.port_mode[0] = EHCI_HCD_OMAP_MODE_PHY,
	.port_mode[1] = EHCI_HCD_OMAP_MODE_PHY,
	.port_mode[2] = EHCI_HCD_OMAP_MODE_UNKNOWN,

	.phy_reset  = true,
	.reset_gpio_port[0]  = 57,
	.reset_gpio_port[1]  = -EINVAL,
	.reset_gpio_port[2]  = -EINVAL
};

#ifdef CONFIG_OMAP_MUX
static struct omap_board_mux board_mux[] __initdata = {
	{ .reg_offset = OMAP_MUX_TERMINATOR },
};
#else
#define board_mux	NULL
#endif

static void __init am3517_evm_init(void)
{
	omap3_mux_init(board_mux, OMAP_PACKAGE_CBB);
	platform_add_devices(am3517_evm_devices,
				ARRAY_SIZE(am3517_evm_devices));

	omap_serial_init();
	usb_ehci_init(&ehci_pdata);
	/* DSS */
	am3517_evm_display_init();
}

static void __init am3517_evm_map_io(void)
{
	omap2_set_globals_343x();
	omap34xx_map_common_io();
}

MACHINE_START(OMAP3517EVM, "OMAP3517/AM3517 EVM")
	.phys_io	= 0x48000000,
	.io_pg_offst	= ((0xd8000000) >> 18) & 0xfffc,
	.boot_params	= 0x80000100,
	.map_io		= am3517_evm_map_io,
	.init_irq	= am3517_evm_init_irq,
	.init_machine	= am3517_evm_init,
	.timer		= &omap_timer,
MACHINE_END