work_92105_spl.c
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/*
* WORK Microwave work_92105 board support
*
* (C) Copyright 2014 DENX Software Engineering GmbH
* Written-by: Albert ARIBAUD <albert.aribaud@3adev.fr>
*
* SPDX-License-Identifier: GPL-2.0+
*/
#include <common.h>
#include <asm/io.h>
#include <asm/arch/sys_proto.h>
#include <asm/arch/cpu.h>
#include <asm/arch/emc.h>
#include <asm/gpio.h>
#include <spl.h>
#include "work_92105_display.h"
struct emc_dram_settings dram_64mb = {
.cmddelay = 0x0001C000,
.config0 = 0x00005682,
.rascas0 = 0x00000302,
.rdconfig = 0x00000011,
.trp = 52631578,
.tras = 20833333,
.tsrex = 12500000,
.twr = 66666666,
.trc = 13888888,
.trfc = 10256410,
.txsr = 12500000,
.trrd = 1,
.tmrd = 1,
.tcdlr = 0,
.refresh = 128000,
.mode = 0x00018000,
.emode = 0x02000000
};
const struct emc_dram_settings dram_128mb = {
.cmddelay = 0x0001C000,
.config0 = 0x00005882,
.rascas0 = 0x00000302,
.rdconfig = 0x00000011,
.trp = 52631578,
.tras = 22222222,
.tsrex = 8333333,
.twr = 66666666,
.trc = 14814814,
.trfc = 10256410,
.txsr = 8333333,
.trrd = 1,
.tmrd = 1,
.tcdlr = 0,
.refresh = 128000,
.mode = 0x00030000,
.emode = 0x02000000
};
void spl_board_init(void)
{
/* initialize serial port for console */
lpc32xx_uart_init(CONFIG_SYS_LPC32XX_UART);
/* initialize console */
preloader_console_init();
/* init DDR and NAND to chainload U-Boot */
ddr_init(&dram_128mb);
/*
* If this is actually a 64MB module, then the highest column
* bit in any address will be ignored, and thus address 0x80000000
* should be mirrored at address 0x80000800. Test this.
*/
writel(0x31415926, 0x80000000); /* write Pi at 0x80000000 */
writel(0x16180339, 0x80000800); /* write Phi at 0x80000800 */
if (readl(0x80000000) == 0x16180339) /* check 0x80000000 */ {
/* actually 64MB mirrored: reconfigure controller */
ddr_init(&dram_64mb);
}
/* initialize NAND controller to load U-Boot from NAND */
lpc32xx_mlc_nand_init();
}
u32 spl_boot_device(void)
{
return BOOT_DEVICE_NAND;
}