m5253demo.c
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/*
* (C) Copyright 2000-2003
* Wolfgang Denk, DENX Software Engineering, wd@denx.de.
*
* Copyright (C) 2004-2007, 2012 Freescale Semiconductor, Inc.
* Hayden Fraser (Hayden.Fraser@freescale.com)
*
* SPDX-License-Identifier: GPL-2.0+
*/
#include <common.h>
#include <asm/immap.h>
#include <netdev.h>
#include <asm/io.h>
DECLARE_GLOBAL_DATA_PTR;
int checkboard(void)
{
puts("Board: ");
puts("Freescale MCF5253 DEMO\n");
return 0;
};
int dram_init(void)
{
u32 dramsize = 0;
/*
* Check to see if the SDRAM has already been initialized
* by a run control tool
*/
if (!(mbar_readLong(MCFSIM_DCR) & 0x8000)) {
u32 RC, temp;
RC = (CONFIG_SYS_CLK / 1000000) >> 1;
RC = (RC * 15) >> 4;
/* Initialize DRAM Control Register: DCR */
mbar_writeShort(MCFSIM_DCR, (0x8400 | RC));
__asm__("nop");
mbar_writeLong(MCFSIM_DACR0, 0x00003224);
__asm__("nop");
/* Initialize DMR0 */
dramsize = (CONFIG_SYS_SDRAM_SIZE << 20);
temp = (dramsize - 1) & 0xFFFC0000;
mbar_writeLong(MCFSIM_DMR0, temp | 1);
__asm__("nop");
mbar_writeLong(MCFSIM_DACR0, 0x0000322c);
mb();
__asm__("nop");
/* Write to this block to initiate precharge */
*(u32 *) (CONFIG_SYS_SDRAM_BASE) = 0xa5a5a5a5;
mb();
__asm__("nop");
/* Set RE bit in DACR */
mbar_writeLong(MCFSIM_DACR0,
mbar_readLong(MCFSIM_DACR0) | 0x8000);
__asm__("nop");
/* Wait for at least 8 auto refresh cycles to occur */
udelay(500);
/* Finish the configuration by issuing the MRS */
mbar_writeLong(MCFSIM_DACR0,
mbar_readLong(MCFSIM_DACR0) | 0x0040);
__asm__("nop");
*(u32 *) (CONFIG_SYS_SDRAM_BASE + 0x800) = 0xa5a5a5a5;
mb();
}
gd->ram_size = dramsize;
return 0;
}
int testdram(void)
{
/* TODO: XXX XXX XXX */
printf("DRAM test not implemented!\n");
return (0);
}
#ifdef CONFIG_IDE
#include <ata.h>
int ide_preinit(void)
{
return (0);
}
void ide_set_reset(int idereset)
{
atac_t *ata = (atac_t *) CONFIG_SYS_ATA_BASE_ADDR;
long period;
/* t1, t2, t3, t4, t5, t6, t9, tRD, tA */
int piotms[5][9] = { {70, 165, 60, 30, 50, 5, 20, 0, 35}, /* PIO 0 */
{50, 125, 45, 20, 35, 5, 15, 0, 35}, /* PIO 1 */
{30, 100, 30, 15, 20, 5, 10, 0, 35}, /* PIO 2 */
{30, 80, 30, 10, 20, 5, 10, 0, 35}, /* PIO 3 */
{25, 70, 20, 10, 20, 5, 10, 0, 35} /* PIO 4 */
};
if (idereset) {
/* control reset */
out_8(&ata->cr, 0);
udelay(100);
} else {
mbar2_writeLong(CIM_MISCCR, CIM_MISCCR_CPUEND);
#define CALC_TIMING(t) (t + period - 1) / period
period = 1000000000 / (CONFIG_SYS_CLK / 2); /* period in ns */
/*ata->ton = CALC_TIMING (180); */
out_8(&ata->t1, CALC_TIMING(piotms[2][0]));
out_8(&ata->t2w, CALC_TIMING(piotms[2][1]));
out_8(&ata->t2r, CALC_TIMING(piotms[2][1]));
out_8(&ata->ta, CALC_TIMING(piotms[2][8]));
out_8(&ata->trd, CALC_TIMING(piotms[2][7]));
out_8(&ata->t4, CALC_TIMING(piotms[2][3]));
out_8(&ata->t9, CALC_TIMING(piotms[2][6]));
/* IORDY enable */
out_8(&ata->cr, 0x40);
udelay(2000);
/* IORDY enable */
setbits_8(&ata->cr, 0x01);
}
}
#endif /* CONFIG_IDE */
#ifdef CONFIG_DRIVER_DM9000
int board_eth_init(bd_t *bis)
{
return dm9000_initialize(bis);
}
#endif