xtensa: Add xt2000 support files.

#

# Makefile for the Tensilica XT2000 Emulation Board

#

obj-y 			= setup.o

/*

 * platform/hardware.h

 *

 * This file is subject to the terms and conditions of the GNU General Public

 * License.  See the file "COPYING" in the main directory of this archive

 * for more details.

 *

 * Copyright (C) 2001 Tensilica Inc.

 */

/*

 * This file contains the hardware configuration of the XT2000 board.

 */

#ifndef _XTENSA_XT2000_HARDWARE_H

#define _XTENSA_XT2000_HARDWARE_H

#include <variant/core.h>

#include <asm/io.h>

/* 

 * Memory configuration.

 */

#define PLATFORM_DEFAULT_MEM_START 0x00000000

#define PLATFORM_DEFAULT_MEM_SIZE 0x08000000

/*

 * Number of platform IRQs

 */

#define PLATFORM_NR_IRQS 3

/*

 * On-board components.

 */

#define SONIC83934_INTNUM	XCHAL_EXTINT3_NUM

#define SONIC83934_ADDR		IOADDR(0x0d030000)

/*

 * V3-PCI

 */

/* The XT2000 uses the V3 as a cascaded interrupt controller for the PCI bus */

#define IRQ_PCI_A		(XCHAL_NUM_INTERRUPTS + 0)

#define IRQ_PCI_B		(XCHAL_NUM_INTERRUPTS + 1)

#define IRQ_PCI_C		(XCHAL_NUM_INTERRUPTS + 2)

/*

 * Various other components.

 */

#define XT2000_LED_ADDR		IOADDR(0x0d040000)

#endif /* _XTENSA_XT2000_HARDWARE_H */

/*

 * platform/serial.h

 *

 * This file is subject to the terms and conditions of the GNU General Public

 * License.  See the file "COPYING" in the main directory of this archive

 * for more details.

 *

 * Copyright (C) 2001 Tensilica Inc.

 */

#ifndef _XTENSA_XT2000_SERIAL_H

#define _XTENSA_XT2000_SERIAL_H

#include <variant/core.h>

#include <asm/io.h>

/*  National-Semi PC16552D DUART:  */

#define DUART16552_1_INTNUM	XCHAL_EXTINT4_NUM

#define DUART16552_2_INTNUM	XCHAL_EXTINT5_NUM

#define DUART16552_1_ADDR	IOADDR(0x0d050020)	/* channel 1 */

#define DUART16552_2_ADDR	IOADDR(0x0d050000)	/* channel 2 */

#define DUART16552_XTAL_FREQ	18432000	/* crystal frequency in Hz */

#define BASE_BAUD ( DUART16552_XTAL_FREQ / 16 )

#endif /* _XTENSA_XT2000_SERIAL_H */

/*

 * arch/xtensa/platforms/xt2000/setup.c

 *

 * Platform specific functions for the XT2000 board.

 *

 * Authors:	Chris Zankel <chris@zankel.net>

 *		Joe Taylor <joe@tensilica.com>

 *

 * Copyright 2001 - 2004 Tensilica Inc.

 *

 * 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.

 *

 */

#include <linux/stddef.h>

#include <linux/kernel.h>

#include <linux/init.h>

#include <linux/errno.h>

#include <linux/reboot.h>

#include <linux/kdev_t.h>

#include <linux/types.h>

#include <linux/major.h>

#include <linux/console.h>

#include <linux/delay.h>

#include <linux/stringify.h>

#include <linux/platform_device.h>

#include <linux/serial.h>

#include <linux/serial_8250.h>

#include <asm/processor.h>

#include <asm/platform.h>

#include <asm/bootparam.h>

#include <platform/hardware.h>

#include <platform/serial.h>

/* Assumes s points to an 8-chr string.  No checking for NULL. */

static void led_print (int f, char *s)

{

	unsigned long* led_addr = (unsigned long*) (XT2000_LED_ADDR + 0xE0) + f;

	int i;

	for (i = f; i < 8; i++)

		if ((*led_addr++ = *s++) == 0)

		    break;

}

void platform_halt(void)

{

	led_print (0, "  HALT  ");

	local_irq_disable();

	while (1);

}

void platform_power_off(void)

{

	led_print (0, "POWEROFF");

	local_irq_disable();

	while (1);

}

void platform_restart(void)

{

	/* Flush and reset the mmu, simulate a processor reset, and

	 * jump to the reset vector. */

	__asm__ __volatile__ ("movi	a2, 15\n\t"

			      "wsr	a2, " __stringify(ICOUNTLEVEL) "\n\t"

			      "movi	a2, 0\n\t"

			      "wsr	a2, " __stringify(ICOUNT) "\n\t"

			      "wsr	a2, " __stringify(IBREAKENABLE) "\n\t"

			      "wsr	a2, " __stringify(LCOUNT) "\n\t"

			      "movi	a2, 0x1f\n\t"

			      "wsr	a2, " __stringify(PS) "\n\t"

			      "isync\n\t"

			      "jx	%0\n\t"

			      :

			      : "a" (XCHAL_RESET_VECTOR_VADDR)

			      : "a2"

			      );

	/* control never gets here */

}

void __init platform_setup(char** cmdline)

{

	led_print (0, "LINUX   ");

}

/* early initialization */

extern sysmem_info_t __initdata sysmem;

void platform_init(bp_tag_t* first)

{

	/* Set default memory block if not provided by the bootloader. */

	if (sysmem.nr_banks == 0) {

		sysmem.nr_banks = 1;

		sysmem.bank[0].start = PLATFORM_DEFAULT_MEM_START;

		sysmem.bank[0].end = PLATFORM_DEFAULT_MEM_START

				     + PLATFORM_DEFAULT_MEM_SIZE;

	}

}

/* Heartbeat. Let the LED blink. */

void platform_heartbeat(void)

{

	static int i=0, t = 0;

	if (--t < 0)

	{

		t = 59;

		led_print(7, i ? ".": " ");

		i ^= 1;

	}

}

//#define RS_TABLE_SIZE 2

//#define STD_COM_FLAGS (ASYNC_BOOT_AUTOCONF|ASYNC_SKIP_TEST)

#define _SERIAL_PORT(_base,_irq)					\

{									\

	.mapbase	= (_base),					\

	.membase	= (void*)(_base),				\

	.irq		= (_irq),					\

	.uartclk	= DUART16552_XTAL_FREQ,				\

	.iotype		= UPIO_MEM,					\

	.flags		= UPF_BOOT_AUTOCONF,				\

	.regshift	= 2,						\

}

static struct plat_serial8250_port xt2000_serial_data[] = {

#if XCHAL_HAVE_BE

	_SERIAL_PORT(DUART16552_1_ADDR + 3, DUART16552_1_INTNUM),

	_SERIAL_PORT(DUART16552_2_ADDR + 3, DUART16552_2_INTNUM),

#else

	_SERIAL_PORT(DUART16552_1_ADDR, DUART16552_1_INTNUM),

	_SERIAL_PORT(DUART16552_2_ADDR, DUART16552_2_INTNUM),

#endif

	{ }

};

static struct platform_device xt2000_serial8250_device = {

	.name		= "serial8250",

	.id		= PLAT8250_DEV_PLATFORM,

	.dev		= {

	    .platform_data = xt2000_serial_data,

	},

};

static struct resource xt2000_sonic_res[] = {

	{

		.start = SONIC83934_ADDR,

		.end   = SONIC83934_ADDR + 0xff,

		.flags = IORESOURCE_MEM,

	},

	{

		.start = SONIC83934_INTNUM,

		.end = SONIC83934_INTNUM,

		.flags = IORESOURCE_IRQ,

	},

};

static struct platform_device xt2000_sonic_device = {

	.name		= "xtsonic",

	.num_resources	= ARRAY_SIZE(xt2000_sonic_res),

	.resource		= xt2000_sonic_res,

};

static int __init xt2000_setup_devinit(void)

{

	platform_device_register(&xt2000_serial8250_device);

	platform_device_register(&xt2000_sonic_device);

	return 0;

}

device_initcall(xt2000_setup_devinit);