mirror of
https://github.com/brain-hackers/u-boot-brain
synced 2024-09-07 13:23:20 +09:00
69 lines
1.5 KiB
C
69 lines
1.5 KiB
C
![]() |
/*
|
||
|
* 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;
|
||
|
}
|