board/stamp/stamp.c

/*
 * U-boot - stamp.c STAMP board specific routines
 *
 * Copyright (c) 2005 blackfin.uclinux.org
 *
 * (C) Copyright 2000-2004
 * Wolfgang Denk, DENX Software Engineering, wd@denx.de.
 *
 * 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 <asm/mem_init.h>
#include "stamp.h"

#define STATUS_LED_OFF 0
#define STATUS_LED_ON  1 	

#ifdef CONFIG_SHOW_BOOT_PROGRESS
# define SHOW_BOOT_PROGRESS(arg)	show_boot_progress(arg)
#else
# define SHOW_BOOT_PROGRESS(arg)	
#endif

int checkboard(void)
{
	printf("CPU:   ADSP BF533 Rev.: 0.%d\n", *pCHIPID >> 28);
	printf("Board: ADI BF533 Stamp board\n");
	printf("       Support: http://blackfin.uclinux.org/\n");
	printf("       Richard Klingler <richard@uclinux.net>\n");
	return 0;
}

long int initdram(int board_type)
{
	DECLARE_GLOBAL_DATA_PTR;
#ifdef DEBUG
	printf("SDRAM attributes:\n");
	printf("  tRCD:%d Cycles; tRP:%d Cycles; tRAS:%d Cycles; tWR:%d Cycles; "
		"CAS Latency:%d cycles\n", (SDRAM_tRCD >> 15), (SDRAM_tRP >> 11),
	(SDRAM_tRAS >> 6), ( SDRAM_tWR >> 19), (SDRAM_CL >> 2 ));
	printf("SDRAM Begin: 0x%x\n", CFG_SDRAM_BASE);
	printf("Bank size = %d MB\n", 128);
#endif
	gd->bd->bi_memstart = CFG_SDRAM_BASE;
	gd->bd->bi_memsize = CFG_MAX_RAM_SIZE;
	return (gd->bd->bi_memsize);
}

void swap_to(int device_id)
{

	if (device_id == ETHERNET)
	{
		*pFIO_DIR = PF0;
		asm("ssync;");
		*pFIO_FLAG_S = PF0;
		asm("ssync;");
	}
	else if (device_id == FLASH)
	{
		*pFIO_DIR = (PF4 | PF3 | PF2 | PF1 | PF0);
		*pFIO_FLAG_S = (PF4 | PF3 | PF2 );
		*pFIO_MASKA_D = (PF8 | PF6 | PF5);
		*pFIO_MASKB_D = (PF7);
		*pFIO_POLAR = (PF8 | PF6 | PF5 );
		*pFIO_EDGE = (PF8 | PF7 | PF6 | PF5);
		*pFIO_INEN = (PF8 | PF7 | PF6 | PF5);
		*pFIO_FLAG_D = (PF4 | PF3 | PF2 );
		asm("ssync;");
	}
	else {
		printf("Unknown bank to switch\n");
	}	
	
	return;
}

#if defined(CONFIG_MISC_INIT_R)
/* miscellaneous platform dependent initialisations */
int misc_init_r(void)
{
	int i;
	int cf_stat = 0;

	/* Check whether CF card is inserted */
	*pFIO_EDGE = FIO_EDGE_CF_BITS;
	*pFIO_POLAR = FIO_POLAR_CF_BITS;
	for (i=0; i < 0x300 ; i++) asm("nop;");
			
	if ( (*pFIO_FLAG_S) & CF_STAT_BITS)
	{
		cf_stat = 0;
	}
	else
	{
		cf_stat = 1;
	}

	*pFIO_EDGE  = FIO_EDGE_BITS;
	*pFIO_POLAR = FIO_POLAR_BITS;
	

	if (cf_stat)
	{
                printf ("Booting from COMPACT flash\n");

		/* Set cycle time for CF */
		*(volatile unsigned long *) ambctl1 = CF_AMBCTL1VAL;

		for (i=0; i < 0x1000 ; i++) asm("nop;");
		for (i=0; i < 0x1000 ; i++) asm("nop;");
		for (i=0; i < 0x1000 ; i++) asm("nop;");

		serial_setbrg();
		ide_init();

		setenv ("bootargs", "");
		setenv ("bootcmd", "fatload ide 0:1 0x1000000 uImage-stamp;bootm 0x1000000;bootm 0x20100000" );
	}
	else
        {
		printf ("Booting from FLASH\n");
	}

	return 1;
}
#endif

#ifdef CONFIG_STAMP_CF

void cf_outb(unsigned char val, volatile unsigned char* addr)
{
	/* 
	 * Set PF1 PF0 respectively to 0 1 to divert address
	 * to the expansion memory banks  
	 */
	*pFIO_FLAG_S = CF_PF0;
	*pFIO_FLAG_C = CF_PF1;
	asm("ssync;");

	*(addr) = val;
	asm("ssync;");

	/* Setback PF1 PF0 to 0 0 to address external 
	 * memory banks  */
	*(volatile unsigned short *) pFIO_FLAG_C = CF_PF1_PF0;
	asm("ssync;");
}

unsigned char cf_inb(volatile unsigned char *addr)
{
	volatile unsigned char c;

	*pFIO_FLAG_S = CF_PF0;
	*pFIO_FLAG_C = CF_PF1;
	asm("ssync;");

	c = *(addr);
	asm("ssync;");

	*pFIO_FLAG_C = CF_PF1_PF0;
	asm("ssync;");

	return c;
}

void cf_insw(unsigned short *sect_buf, unsigned short *addr, int words)
{
	int i;

	*pFIO_FLAG_S = CF_PF0;
	*pFIO_FLAG_C = CF_PF1;
	asm("ssync;");

	for (i = 0;i < words; i++)
	{
		*(sect_buf + i) = *(addr);
		asm("ssync;");
	}

	*pFIO_FLAG_C = CF_PF1_PF0;
	asm("ssync;");
}

void cf_outsw(unsigned short *addr, unsigned short *sect_buf, int words)
{
	int i;

	*pFIO_FLAG_S = CF_PF0;
	*pFIO_FLAG_C = CF_PF1;
	asm("ssync;");

	for (i = 0;i < words; i++)
	{
		*(addr) = *(sect_buf + i);
		asm("ssync;");
	}

	*pFIO_FLAG_C = CF_PF1_PF0;
	asm("ssync;");
}
#endif

void stamp_led_set(int LED1, int LED2, int LED3)
{
	*pFIO_INEN  &= ~( PF2 | PF3 | PF4);
	*pFIO_DIR   |=  ( PF2 | PF3 | PF4);
	
	if(LED1 == STATUS_LED_OFF)
		*pFIO_FLAG_S = PF2;
	else
		*pFIO_FLAG_C = PF2;
	if(LED2 == STATUS_LED_OFF)
		*pFIO_FLAG_S = PF3;
	else
		*pFIO_FLAG_C = PF3;
	if(LED3 == STATUS_LED_OFF)
		*pFIO_FLAG_S = PF4;
	else
		*pFIO_FLAG_C = PF4;
	asm("ssync;");
}

void show_boot_progress(int status)
{
	switch(status){
		case 1:	
			stamp_led_set(STATUS_LED_OFF,STATUS_LED_OFF,STATUS_LED_ON);
			break;
		case 2:
			stamp_led_set(STATUS_LED_OFF,STATUS_LED_ON,STATUS_LED_OFF);
			break;
		case 3:
			stamp_led_set(STATUS_LED_OFF,STATUS_LED_ON,STATUS_LED_ON);
			break;	
		case 4:
			stamp_led_set(STATUS_LED_ON,STATUS_LED_OFF,STATUS_LED_OFF);			
			break;
		case 5:
		case 6:
			stamp_led_set(STATUS_LED_ON,STATUS_LED_OFF,STATUS_LED_ON);			
			break;
		case 7:
		case 8:
			stamp_led_set(STATUS_LED_ON,STATUS_LED_ON,STATUS_LED_OFF);			
			break;
		case 9:
		case 10:
		case 11:
		case 12:
		case 13:
		case 14:
		case 15:
			stamp_led_set(STATUS_LED_OFF,STATUS_LED_OFF,STATUS_LED_OFF);			
			break;
		default:
			stamp_led_set(STATUS_LED_ON,STATUS_LED_ON,STATUS_LED_ON);			
			break;
	}
}