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