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https://github.com/AsahiLinux/u-boot
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7a5337732e
This patch enables SPI Booting for EXYNOS5 Signed-off-by: Rajeshwari Shinde <rajeshwari.s@samsung.com> Signed-off-by: Minkyu Kang <mk7.kang@samsung.com>
85 lines
2.2 KiB
C
85 lines
2.2 KiB
C
/*
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* Copyright (C) 2012 Samsung Electronics
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*
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* See file CREDITS for list of people who contributed to this
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* project.
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*
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* This program is free software; you can redistribute it and/or
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* modify it under the terms of the GNU General Public License as
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* published by the Free Software Foundation; either version 2 of
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* the License, or (at your option) any later version.
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*
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* This program is distributed in the hope that it will be useful,
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* but WITHOUT ANY WARRANTY; without even the implied warranty of
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* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
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* GNU General Public License for more details.
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*
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* You should have received a copy of the GNU General Public License
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* along with this program; if not, write to the Free Software
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* Foundation, Inc., 59 Temple Place, Suite 330, Boston,
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* MA 02111-1307 USA
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*/
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#include<common.h>
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#include<config.h>
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enum boot_mode {
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BOOT_MODE_MMC = 4,
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BOOT_MODE_SERIAL = 20,
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/* Boot based on Operating Mode pin settings */
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BOOT_MODE_OM = 32,
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BOOT_MODE_USB, /* Boot using USB download */
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};
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typedef u32 (*spi_copy_func_t)(u32 offset, u32 nblock, u32 dst);
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/*
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* Copy U-boot from mmc to RAM:
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* COPY_BL2_FNPTR_ADDR: Address in iRAM, which Contains
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* Pointer to API (Data transfer from mmc to ram)
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*/
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void copy_uboot_to_ram(void)
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{
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spi_copy_func_t spi_copy;
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enum boot_mode bootmode;
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u32 (*copy_bl2)(u32, u32, u32);
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bootmode = readl(EXYNOS5_POWER_BASE) & OM_STAT;
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switch (bootmode) {
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case BOOT_MODE_SERIAL:
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spi_copy = *(spi_copy_func_t *)EXYNOS_COPY_SPI_FNPTR_ADDR;
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spi_copy(SPI_FLASH_UBOOT_POS, CONFIG_BL2_SIZE,
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CONFIG_SYS_TEXT_BASE);
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break;
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case BOOT_MODE_MMC:
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copy_bl2 = (void *) *(u32 *)COPY_BL2_FNPTR_ADDR;
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copy_bl2(BL2_START_OFFSET, BL2_SIZE_BLOC_COUNT,
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CONFIG_SYS_TEXT_BASE);
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break;
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default:
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break;
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}
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}
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void board_init_f(unsigned long bootflag)
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{
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__attribute__((noreturn)) void (*uboot)(void);
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copy_uboot_to_ram();
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/* Jump to U-Boot image */
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uboot = (void *)CONFIG_SYS_TEXT_BASE;
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(*uboot)();
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/* Never returns Here */
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}
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/* Place Holders */
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void board_init_r(gd_t *id, ulong dest_addr)
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{
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/* Function attribute is no-return */
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/* This Function never executes */
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while (1)
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;
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}
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void save_boot_params(u32 r0, u32 r1, u32 r2, u32 r3) {}
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