pb1x00.c

UBOOT 源码

/*
 * (C) Copyright 2003
 * [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 <command.h>
#include <asm/au1x00.h>
#include <asm/mipsregs.h>

long int initdram(int board_type)
{
	/* Sdram is setup by assembler code */
	/* If memory could be changed, we should return the true value here */
	return 64*1024*1024;
}

#define BCSR_PCMCIA_PC0DRVEN		0x0010
#define BCSR_PCMCIA_PC0RST		0x0080

/* In cpu/mips/cpu.c */
void write_one_tlb( int index, u32 pagemask, u32 hi, u32 low0, u32 low1 );

int checkboard (void)
{
	u16 status;
	/* volatile u32 *pcmcia_bcsr = (u32*)(DB1000_BCSR_ADDR+0x10); */
	volatile u32 *sys_counter = (volatile u32*)SYS_COUNTER_CNTRL;
	u32 proc_id;

	*sys_counter = 0x100; /* Enable 32 kHz oscillator for RTC/TOY */

	proc_id = read_32bit_cp0_register(CP0_PRID);

	switch (proc_id >> 24) {
	case 0:
		puts ("Board: Pb1000\n");
		printf ("CPU: Au1000 396 MHz, id: 0x%02x, rev: 0x%02x\n",
			(proc_id >> 8) & 0xFF, proc_id & 0xFF);
		break;
	case 1:
		puts ("Board: Pb1500\n");
		printf ("CPU: Au1500, id: 0x%02x, rev: 0x%02x\n",
			(proc_id >> 8) & 0xFF, proc_id & 0xFF);
		break;
	case 2:
		puts ("Board: Pb1100\n");
		printf ("CPU: Au1100, id: 0x%02x, rev: 0x%02x\n",
			(proc_id >> 8) & 0xFF, proc_id & 0xFF);
		break;
	default:
		printf ("Unsupported cpu %d, proc_id=0x%x\n", proc_id >> 24, proc_id);
	}
#if defined(CONFIG_IDE_PCMCIA) && 0
	/* Enable 3.3 V on slot 0 ( VCC )
	   No 5V */
	status = 4;
	*pcmcia_bcsr = status;

	status |= BCSR_PCMCIA_PC0DRVEN;
	*pcmcia_bcsr = status;
	au_sync();

	udelay(300*1000);

	status |= BCSR_PCMCIA_PC0RST;
	*pcmcia_bcsr = status;
	au_sync();

	udelay(100*1000);

	/* PCMCIA is on a 36 bit physical address.
	   We need to map it into a 32 bit addresses */

#if 0
	/* We dont need theese unless we run whole pcmcia package */
	write_one_tlb(20,                 /* index */
		      0x01ffe000,         /* Pagemask, 16 MB pages */
		      CFG_PCMCIA_IO_BASE, /* Hi */
		      0x3C000017,         /* Lo0 */
		      0x3C200017);        /* Lo1 */

	write_one_tlb(21,                   /* index */
		      0x01ffe000,           /* Pagemask, 16 MB pages */
		      CFG_PCMCIA_ATTR_BASE, /* Hi */
		      0x3D000017,           /* Lo0 */
		      0x3D200017);          /* Lo1 */
#endif	/* 0 */
	write_one_tlb(22,                   /* index */
		      0x01ffe000,           /* Pagemask, 16 MB pages */
		      CFG_PCMCIA_MEM_ADDR,  /* Hi */
		      0x3E000017,           /* Lo0 */
		      0x3E200017);          /* Lo1 */
#endif	/* CONFIG_IDE_PCMCIA */

	return 0;
}