devkit3250_spl.c
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/*
* Timll DevKit3250 board support, SPL board configuration
*
* (C) Copyright 2015 Vladimir Zapolskiy <vz@mleia.com>
*
* 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/arch-lpc32xx/gpio.h>
#include <spl.h>
static struct gpio_regs *gpio = (struct gpio_regs *)GPIO_BASE;
/*
* SDRAM K4S561632N-LC60 settings are selected in assumption that
* SDRAM clock may be set up to 166 MHz, however at the moment
* it is 104 MHz. Most delay values are converted to be a multiple of
* base clock, and precise pinned values are not needed here.
*/
struct emc_dram_settings dram_64mb = {
.cmddelay = 0x0001C000,
.config0 = 0x00005682,
.rascas0 = 0x00000302,
.rdconfig = 0x00000011, /* undocumented but crucial value */
.trp = 83333333,
.tras = 23809524,
.tsrex = 12500000,
.twr = 83000000, /* tWR = tRDL = 2 CLK */
.trc = 15384616,
.trfc = 15384616,
.txsr = 12500000,
.trrd = 1,
.tmrd = 1,
.tcdlr = 0,
.refresh = 130000, /* 800 clock cycles */
.mode = 0x00018000,
.emode = 0x02000000,
};
void spl_board_init(void)
{
/* First of all silence buzzer controlled by GPO_20 */
writel((1 << 20), &gpio->p3_outp_clr);
lpc32xx_uart_init(CONFIG_SYS_LPC32XX_UART);
preloader_console_init();
ddr_init(&dram_64mb);
/*
* NAND initialization is done by nand_init(),
* here just enable NAND SLC clocks
*/
lpc32xx_slc_nand_init();
}
u32 spl_boot_device(void)
{
return BOOT_DEVICE_NAND;
}