linux-stable-rt/arch/arm/mach-omap/board-voiceblue.c

/*
 * linux/arch/arm/mach-omap/board-voiceblue.c
 *
 * Modified from board-generic.c
 *
 * Copyright (C) 2004 2N Telekomunikace, Ladislav Michl <michl@2n.cz>
 *
 * Code for OMAP5910 based VoiceBlue board (VoIP to GSM gateway).
 *
 * 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/delay.h>
#include <linux/device.h>
#include <linux/interrupt.h>
#include <linux/init.h>
#include <linux/kernel.h>
#include <linux/notifier.h>
#include <linux/reboot.h>
#include <linux/serial_8250.h>
#include <linux/serial_reg.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/tc.h>
#include <asm/arch/mux.h>
#include <asm/arch/usb.h>

#include "common.h"

extern void omap_init_time(void);
extern int omap_gpio_init(void);

static struct plat_serial8250_port voiceblue_ports[] = {
	{
		.mapbase	= (unsigned long)(OMAP_CS1_PHYS + 0x40000),
		.irq		= OMAP_GPIO_IRQ(12),
		.flags		= UPF_BOOT_AUTOCONF | UPF_IOREMAP,
		.iotype		= UPIO_MEM,
		.regshift	= 1,
		.uartclk	= 3686400,
	},
	{
		.mapbase	= (unsigned long)(OMAP_CS1_PHYS + 0x50000),
		.irq		= OMAP_GPIO_IRQ(13),
		.flags		= UPF_BOOT_AUTOCONF | UPF_IOREMAP,
		.iotype		= UPIO_MEM,
		.regshift	= 1,
		.uartclk	= 3686400,
	},
	{
		.mapbase	= (unsigned long)(OMAP_CS1_PHYS + 0x60000),
		.irq		= OMAP_GPIO_IRQ(14),
		.flags		= UPF_BOOT_AUTOCONF | UPF_IOREMAP,
		.iotype		= UPIO_MEM,
		.regshift	= 1,
		.uartclk	= 3686400,
	},
	{
		.mapbase	= (unsigned long)(OMAP_CS1_PHYS + 0x70000),
		.irq		= OMAP_GPIO_IRQ(15),
		.flags		= UPF_BOOT_AUTOCONF | UPF_IOREMAP,
		.iotype		= UPIO_MEM,
		.regshift	= 1,
		.uartclk	= 3686400,
	},
	{ },
};

static struct platform_device serial_device = {
	.name			= "serial8250",
	.id			= 1,
	.dev			= {
		.platform_data	= voiceblue_ports,
	},
};

static int __init ext_uart_init(void)
{
	return platform_device_register(&serial_device);
}
arch_initcall(ext_uart_init);

static struct resource voiceblue_smc91x_resources[] = {
	[0] = {
		.start	= OMAP_CS2_PHYS + 0x300,
		.end	= OMAP_CS2_PHYS + 0x300 + 16,
		.flags	= IORESOURCE_MEM,
	},
	[1] = {
		.start	= OMAP_GPIO_IRQ(8),
		.end	= OMAP_GPIO_IRQ(8),
		.flags	= IORESOURCE_IRQ,
	},
};

static struct platform_device voiceblue_smc91x_device = {
	.name		= "smc91x",
	.id		= 0,
	.num_resources	= ARRAY_SIZE(voiceblue_smc91x_resources),
	.resource	= voiceblue_smc91x_resources,
};

static struct platform_device *voiceblue_devices[] __initdata = {
	&voiceblue_smc91x_device,
};

static struct omap_usb_config voiceblue_usb_config __initdata = {
	.hmc_mode	= 3,
	.register_host	= 1,
	.register_dev   = 1,
	.pins[0]	= 2,
	.pins[1]	= 6,
	.pins[2]	= 6,
};

static struct omap_board_config_kernel voiceblue_config[] = {
	{ OMAP_TAG_USB, &voiceblue_usb_config },
};

static void __init voiceblue_init_irq(void)
{
	omap_init_irq();
	omap_gpio_init();
}

static void __init voiceblue_init(void)
{
	/* There is a good chance board is going up, so enable Power LED
	 * (it is connected through invertor) */
	omap_writeb(0x00, OMAP_LPG1_LCR);
	/* Watchdog */
	omap_request_gpio(0);
	/* smc91x reset */
	omap_request_gpio(7);
	omap_set_gpio_direction(7, 0);
	omap_set_gpio_dataout(7, 1);
	udelay(2);	/* wait at least 100ns */
	omap_set_gpio_dataout(7, 0);
	mdelay(50);	/* 50ms until PHY ready */
	/* smc91x interrupt pin */
	omap_request_gpio(8);
	omap_set_gpio_edge_ctrl(8, OMAP_GPIO_RISING_EDGE);
	/* 16C554 reset*/
	omap_request_gpio(6);
	omap_set_gpio_direction(6, 0);
	omap_set_gpio_dataout(6, 0);
	/* 16C554 interrupt pins */
	omap_request_gpio(12);
	omap_request_gpio(13);
	omap_request_gpio(14);
	omap_request_gpio(15);
	omap_set_gpio_edge_ctrl(12, OMAP_GPIO_RISING_EDGE);
	omap_set_gpio_edge_ctrl(13, OMAP_GPIO_RISING_EDGE);
	omap_set_gpio_edge_ctrl(14, OMAP_GPIO_RISING_EDGE);
	omap_set_gpio_edge_ctrl(15, OMAP_GPIO_RISING_EDGE);

	platform_add_devices(voiceblue_devices, ARRAY_SIZE(voiceblue_devices));
	omap_board_config = voiceblue_config;
	omap_board_config_size = ARRAY_SIZE(voiceblue_config);
}

static int __initdata omap_serial_ports[OMAP_MAX_NR_PORTS] = {1, 1, 1};

static void __init voiceblue_map_io(void)
{
	omap_map_io();
	omap_serial_init(omap_serial_ports);
}

#define MACHINE_PANICED		1
#define MACHINE_REBOOTING	2
#define MACHINE_REBOOT		4
static unsigned long machine_state;

static int panic_event(struct notifier_block *this, unsigned long event,
	 void *ptr)
{
	if (test_and_set_bit(MACHINE_PANICED, &machine_state))
		return NOTIFY_DONE;

	/* Flash Power LED
	 * (TODO: Enable clock right way (enabled in bootloader already)) */
	omap_writeb(0x78, OMAP_LPG1_LCR);

	return NOTIFY_DONE;
}

static struct notifier_block panic_block = {
	.notifier_call	= panic_event,
};

static int __init setup_notifier(void)
{
	/* Setup panic notifier */
	notifier_chain_register(&panic_notifier_list, &panic_block);

	return 0;
}

postcore_initcall(setup_notifier);

static int wdt_gpio_state;

void voiceblue_wdt_enable(void)
{
	omap_set_gpio_direction(0, 0);
	omap_set_gpio_dataout(0, 0);
	omap_set_gpio_dataout(0, 1);
	omap_set_gpio_dataout(0, 0);
	wdt_gpio_state = 0;
}

void voiceblue_wdt_disable(void)
{
	omap_set_gpio_dataout(0, 0);
	omap_set_gpio_dataout(0, 1);
	omap_set_gpio_dataout(0, 0);
	omap_set_gpio_direction(0, 1);
}

void voiceblue_wdt_ping(void)
{
	if (test_bit(MACHINE_REBOOT, &machine_state))
		return;

	wdt_gpio_state = !wdt_gpio_state;
	omap_set_gpio_dataout(0, wdt_gpio_state);
}

void voiceblue_reset(void)
{
	set_bit(MACHINE_REBOOT, &machine_state);
	voiceblue_wdt_enable();
	while (1) ;
}

EXPORT_SYMBOL(voiceblue_wdt_enable);
EXPORT_SYMBOL(voiceblue_wdt_disable);
EXPORT_SYMBOL(voiceblue_wdt_ping);

MACHINE_START(VOICEBLUE, "VoiceBlue OMAP5910")
	MAINTAINER("Ladislav Michl <michl@2n.cz>")
	BOOT_MEM(0x10000000, 0xfff00000, 0xfef00000)
	BOOT_PARAMS(0x10000100)
	MAPIO(voiceblue_map_io)
	INITIRQ(voiceblue_init_irq)
	INIT_MACHINE(voiceblue_init)
	.timer = &omap_timer,
MACHINE_END