bmw.c

ATMEL公司的AT91RM9200芯片在嵌入式系统中应用非常多

/*
 * (C) Copyright 2002
 * James F. Dougherty, Broadcom Corporation, [e-mail]
 *
 * See file CREDITS for list of people who contributed to this
 * project.
 *
 * 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.
 *
 * 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 <common.h>
#include <common.h>
#include <watchdog.h>
#include <command.h>
#include <malloc.h>
#include <devices.h>
#include <syscall.h>
#include <net.h>
#include <version.h>
#include <dtt.h>
#include <mpc824x.h>
#include <asm/processor.h>
#include <linux/mtd/doc2000.h>

#include "bmw.h"
#include "m48t59y.h"
#include <pci.h>


int checkboard(void)
{
    ulong busfreq  = get_bus_freq(0);
    char  buf[32];

    puts ("Board: BMW MPC8245/KAHLUA2 - CHRP (MAP B)\n");
    printf("Built: %s at %s\n", __DATE__ , __TIME__ );
    /* printf("MPLD:  Revision %d\n", SYS_REVID_GET()); */
    printf("Local Bus at %s MHz\n", strmhz(buf, busfreq));
    return 0;
}

long int initdram(int board_type)
{
    return 64*1024*1024;
}


void
get_tod(void)
{
    int year, month, day, hour, minute, second;

    m48_tod_get(&year,
		&month,
		&day,
		&hour,
		&minute,
		&second);

    printf("  Current date/time: %d/%d/%d %d:%d:%d \n",
	   month, day, year, hour, minute, second);

}

/*
 * EPIC, PCI, and I/O devices.
 * Initialize Mousse Platform, probe for PCI devices,
 * Query configuration parameters if not set.
 */
int misc_init_f (void)
{
#if 0
    m48_tod_init(); /* Init SGS M48T59Y TOD/NVRAM */
    printf("RTC:   M48T589 TOD/NVRAM (%d) bytes\n",
	   TOD_NVRAM_SIZE);
    get_tod();
#endif

    sys_led_msg("BOOT");
    return 0;
}





/*
 * Initialize PCI Devices, report devices found.
 */
struct pci_controller hose;

void pci_init_board (void)
{
    pci_mpc824x_init(&hose);
    /* pci_dev_init(0); */
}

/*
 * Write characters to LCD display.
 * Note that the bytes for the first character is the last address.
 */
void
sys_led_msg(char* msg)
{
    LED_REG(0) = msg[3];
    LED_REG(1) = msg[2];
    LED_REG(2) = msg[1];
    LED_REG(3) = msg[0];
}

/*
 * Map onboard TSOP-16MB DOC FLASH chip.
 */
void doc_init (void)
{
    doc_probe(DOC_BASE_ADDR);
}

#define NV_ADDR	((volatile unsigned char *) CFG_ENV_ADDR)

/* Read from NVRAM */
void*
nvram_read(void *dest, const long src, size_t count)
{
    int i;
    volatile unsigned char* d = (unsigned char*)dest;
    volatile unsigned char* s = (unsigned char*)src;

    for( i = 0; i < count;i++)
	d[i] = s[i];

    return dest;
}

/* Write to NVRAM */
void
nvram_write(long dest, const void *src, size_t count)
{
    int i;
    volatile unsigned char* d = (unsigned char*)dest;
    volatile unsigned char* s = (unsigned char*)src;

    SYS_TOD_UNPROTECT();

    for( i = 0; i < count;i++)
	d[i] = s[i];

    SYS_TOD_PROTECT();
}