u-boot/drivers/mmc/fsl_esdhc_spl.c
Tom Rini 83d290c56f SPDX: Convert all of our single license tags to Linux Kernel style
When U-Boot started using SPDX tags we were among the early adopters and
there weren't a lot of other examples to borrow from.  So we picked the
area of the file that usually had a full license text and replaced it
with an appropriate SPDX-License-Identifier: entry.  Since then, the
Linux Kernel has adopted SPDX tags and they place it as the very first
line in a file (except where shebangs are used, then it's second line)
and with slightly different comment styles than us.

In part due to community overlap, in part due to better tag visibility
and in part for other minor reasons, switch over to that style.

This commit changes all instances where we have a single declared
license in the tag as both the before and after are identical in tag
contents.  There's also a few places where I found we did not have a tag
and have introduced one.

Signed-off-by: Tom Rini <trini@konsulko.com>
2018-05-07 09:34:12 -04:00

151 lines
3.4 KiB
C

// SPDX-License-Identifier: GPL-2.0+
/*
* Copyright 2013 Freescale Semiconductor, Inc.
*/
#include <common.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_IMAGE_SIZE 0x48
#define ESDHC_BOOT_IMAGE_ADDR 0x50
#define MBRDBR_BOOT_SIG_55 0x1fe
#define MBRDBR_BOOT_SIG_AA 0x1ff
#define CONFIG_CFG_DATA_SECTOR 0
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;
uchar val;
uint i, byte_num;
#endif
u32 offset, code_len;
struct mmc *mmc;
mmc = find_mmc_device(0);
if (!mmc) {
puts("spl: mmc device not found!!\n");
hang();
}
#ifdef CONFIG_FSL_CORENET
offset = CONFIG_SYS_MMC_U_BOOT_OFFS;
code_len = CONFIG_SYS_MMC_U_BOOT_SIZE;
#else
blklen = mmc->read_bl_len;
tmp_buf = malloc(blklen);
if (!tmp_buf) {
puts("spl: malloc memory failed!!\n");
hang();
}
memset(tmp_buf, 0, blklen);
/*
* Read source addr from sd card
*/
err = mmc->block_dev.block_read(&mmc->block_dev,
CONFIG_CFG_DATA_SECTOR, 1, tmp_buf);
if (err != 1) {
puts("spl: mmc read failed!!\n");
free(tmp_buf);
hang();
}
val = *(tmp_buf + MBRDBR_BOOT_SIG_55);
if (0x55 != val) {
puts("spl: mmc signature is not valid!!\n");
free(tmp_buf);
hang();
}
val = *(tmp_buf + MBRDBR_BOOT_SIG_AA);
if (0xAA != val) {
puts("spl: mmc signature is not valid!!\n");
free(tmp_buf);
hang();
}
byte_num = 4;
offset = 0;
for (i = 0; i < byte_num; i++) {
val = *(tmp_buf + ESDHC_BOOT_IMAGE_ADDR + i);
offset = (offset << 8) + val;
}
offset += CONFIG_SYS_MMC_U_BOOT_OFFS;
/* Get the code size from offset 0x48 */
byte_num = 4;
code_len = 0;
for (i = 0; i < byte_num; i++) {
val = *(tmp_buf + ESDHC_BOOT_IMAGE_SIZE + i);
code_len = (code_len << 8) + val;
}
code_len -= CONFIG_SYS_MMC_U_BOOT_OFFS;
/*
* Load U-Boot image from mmc into RAM
*/
#endif
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)();
}