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// SPDX-License-Identifier: GPL-2.0+
/*
* Copyright 2013 Freescale Semiconductor, Inc.
*/
#include <common.h>
#include <cpu_func.h>
#include <hang.h>
#include <mmc.h>
#include <malloc.h>
/*
* The environment variables are written to just after the u-boot image
* on SDCard, so we must read the MBR to get the start address and code
* length of the u-boot image, then calculate the address of the env.
*/
#define ESDHC_BOOT_SIGNATURE_OFF 0x40
#define ESDHC_BOOT_SIGNATURE 0x424f4f54
#define ESDHC_BOOT_IMAGE_SIZE 0x48
#define ESDHC_BOOT_IMAGE_ADDR 0x50
#define MBRDBR_BOOT_SIG_55 0x1fe
#define MBRDBR_BOOT_SIG_AA 0x1ff
void mmc_spl_load_image(uint32_t offs, unsigned int size, void *vdst)
{
uint blk_start, blk_cnt, err;
struct mmc *mmc = find_mmc_device(0);
if (!mmc) {
puts("spl: mmc device not found!!\n");
hang();
}
if (mmc_init(mmc)) {
puts("MMC init failed\n");
return;
}
blk_start = ALIGN(offs, mmc->read_bl_len) / mmc->read_bl_len;
blk_cnt = ALIGN(size, mmc->read_bl_len) / mmc->read_bl_len;
err = mmc->block_dev.block_read(&mmc->block_dev, blk_start, blk_cnt,
vdst);
if (err != blk_cnt) {
puts("spl: mmc read failed!!\n");
hang();
}
}
/*
* The main entry for mmc booting. It's necessary that SDRAM is already
* configured and available since this code loads the main U-Boot image
* from mmc into SDRAM and starts it from there.
*/
void __noreturn mmc_boot(void)
{
__attribute__((noreturn)) void (*uboot)(void);
uint blk_start, blk_cnt, err;
#ifndef CONFIG_FSL_CORENET
uchar *tmp_buf;
u32 blklen;
u32 blk_off;
uchar val;
#ifndef CONFIG_SPL_FSL_PBL
u32 val32;
#endif
uint i, byte_num;
u32 sector;
#endif
u32 offset, code_len;
struct mmc *mmc;
mmc = find_mmc_device(0);
if (!mmc) {
puts("spl: mmc device not found!!\n");
hang();
}
if (mmc_init(mmc)) {
puts("spl: mmc device init failed!\n");
hang();
}
#ifdef CONFIG_FSL_CORENET
offset = CONFIG_SYS_MMC_U_BOOT_OFFS;
#else
blklen = mmc->read_bl_len;
if (blklen < 512)
blklen = 512;
tmp_buf = malloc(blklen);
if (!tmp_buf) {
puts("spl: malloc memory failed!!\n");
hang();
}
sector = 0;
again:
memset(tmp_buf, 0, blklen);
/*
* Read source addr from sd card
*/
blk_start = (sector * 512) / mmc->read_bl_len;
blk_off = (sector * 512) % mmc->read_bl_len;
blk_cnt = DIV_ROUND_UP(512, mmc->read_bl_len);
err = mmc->block_dev.block_read(&mmc->block_dev, blk_start, blk_cnt, tmp_buf);
if (err != blk_cnt) {
puts("spl: mmc read failed!!\n");
hang();
}
#ifdef CONFIG_SPL_FSL_PBL
val = *(tmp_buf + blk_off + MBRDBR_BOOT_SIG_55);
if (0x55 != val) {
puts("spl: mmc MBR/DBR signature is not valid!!\n");
hang();
}
val = *(tmp_buf + blk_off + MBRDBR_BOOT_SIG_AA);
if (0xAA != val) {
puts("spl: mmc MBR/DBR signature is not valid!!\n");
hang();
}
#else
/*
* Booting from On-Chip ROM (eSDHC or eSPI), Document Number: AN3659, Rev. 2, 06/2012.
* Pre-PBL BootROMs (MPC8536E, MPC8569E, P2020, P1011, P1012, P1013, P1020, P1021, P1022)
* require custom BOOT signature on sector 0 and MBR/DBR signature is not required at all.
*/
byte_num = 4;
val32 = 0;
for (i = 0; i < byte_num; i++) {
val = *(tmp_buf + blk_off + ESDHC_BOOT_SIGNATURE_OFF + i);
val32 = (val32 << 8) + val;
}
if (val32 != ESDHC_BOOT_SIGNATURE) {
/* BOOT signature may be on the first 24 sectors (each being 512 bytes) */
if (++sector < 24)
goto again;
puts("spl: mmc BOOT signature is not valid!!\n");
hang();
}
#endif
byte_num = 4;
offset = 0;
for (i = 0; i < byte_num; i++) {
val = *(tmp_buf + blk_off + ESDHC_BOOT_IMAGE_ADDR + i);
offset = (offset << 8) + val;
}
offset += CONFIG_SYS_MMC_U_BOOT_OFFS;
#endif
/*
* Load U-Boot image from mmc into RAM
*/
code_len = CONFIG_SYS_MMC_U_BOOT_SIZE;
blk_start = ALIGN(offset, mmc->read_bl_len) / mmc->read_bl_len;
blk_cnt = ALIGN(code_len, mmc->read_bl_len) / mmc->read_bl_len;
err = mmc->block_dev.block_read(&mmc->block_dev, blk_start, blk_cnt,
(uchar *)CONFIG_SYS_MMC_U_BOOT_DST);
if (err != blk_cnt) {
puts("spl: mmc read failed!!\n");
#ifndef CONFIG_FSL_CORENET
free(tmp_buf);
#endif
hang();
}
/*
* Clean d-cache and invalidate i-cache, to
* make sure that no stale data is executed.
*/
flush_cache(CONFIG_SYS_MMC_U_BOOT_DST, CONFIG_SYS_MMC_U_BOOT_SIZE);
/*
* Jump to U-Boot image
*/
uboot = (void *)CONFIG_SYS_MMC_U_BOOT_START;
(*uboot)();
}
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