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u-boot/common/spl/spl_mmc.c
Baruch Siach e42afd8416 spl: mmc: support uboot image offset on main partition 
On Armada 38x platforms the ROM code loads SPL from offset 0 of eMMC
hardware boot partitions. When there are no boot partitions (i.e. SD
card) the ROM skips the first sector that usually contains the (logical)
partition table. Since the generated .kwb image contains the main U-Boot
image in a fixed location (0x140 sectors by default), we end up with the
main U-Boot image in offset of 1 sector. The current workaround is to
manually set CONFIG_SYS_MMCSD_RAW_MODE_U_BOOT_SECTOR to 0x141 to
compensate for that.

This patch uses the run-time detected boot partition to determine the
right offset of the main U-Boot partition. The generated .kwb image is
now compatible with both eMMC boot partition, and SD card main data
partition.

Signed-off-by: Baruch Siach <baruch@tkos.co.il>
Reviewed-by: Stefan Roese <sr@denx.de>
Signed-off-by: Stefan Roese <sr@denx.de>
2020-01-16 10:58:52 +01:00

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// SPDX-License-Identifier: GPL-2.0+
/*
* (C) Copyright 2010
* Texas Instruments, <www.ti.com>
*
* Aneesh V <aneesh@ti.com>
*/
#include <common.h>
#include <dm.h>
#include <spl.h>
#include <linux/compiler.h>
#include <errno.h>
#include <asm/u-boot.h>
#include <errno.h>
#include <mmc.h>
#include <image.h>
static int mmc_load_legacy(struct spl_image_info *spl_image, struct mmc *mmc,
ulong sector, struct image_header *header)
{
u32 image_size_sectors;
unsigned long count;
int ret;
ret = spl_parse_image_header(spl_image, header);
if (ret)
return ret;
/* convert size to sectors - round up */
image_size_sectors = (spl_image->size + mmc->read_bl_len - 1) /
mmc->read_bl_len;
/* Read the header too to avoid extra memcpy */
count = blk_dread(mmc_get_blk_desc(mmc), sector, image_size_sectors,
(void *)(ulong)spl_image->load_addr);
debug("read %x sectors to %lx\n", image_size_sectors,
spl_image->load_addr);
if (count != image_size_sectors)
return -EIO;
return 0;
}
static ulong h_spl_load_read(struct spl_load_info *load, ulong sector,
ulong count, void *buf)
{
struct mmc *mmc = load->dev;
return blk_dread(mmc_get_blk_desc(mmc), sector, count, buf);
}
static __maybe_unused unsigned long spl_mmc_raw_uboot_offset(int part)
{
#if IS_ENABLED(CONFIG_SYS_MMCSD_RAW_MODE_U_BOOT_USE_SECTOR)
if (part == 0)
return CONFIG_SYS_MMCSD_RAW_MODE_U_BOOT_DATA_PART_OFFSET;
#endif
return 0;
}
static __maybe_unused
int mmc_load_image_raw_sector(struct spl_image_info *spl_image,
struct mmc *mmc, unsigned long sector)
{
unsigned long count;
struct image_header *header;
struct blk_desc *bd = mmc_get_blk_desc(mmc);
int ret = 0;
header = spl_get_load_buffer(-sizeof(*header), bd->blksz);
/* read image header to find the image size & load address */
count = blk_dread(bd, sector, 1, header);
debug("hdr read sector %lx, count=%lu\n", sector, count);
if (count == 0) {
ret = -EIO;
goto end;
}
if (IS_ENABLED(CONFIG_SPL_LOAD_FIT) &&
image_get_magic(header) == FDT_MAGIC) {
struct spl_load_info load;
debug("Found FIT\n");
load.dev = mmc;
load.priv = NULL;
load.filename = NULL;
load.bl_len = mmc->read_bl_len;
load.read = h_spl_load_read;
ret = spl_load_simple_fit(spl_image, &load, sector, header);
} else if (IS_ENABLED(CONFIG_SPL_LOAD_IMX_CONTAINER)) {
struct spl_load_info load;
load.dev = mmc;
load.priv = NULL;
load.filename = NULL;
load.bl_len = mmc->read_bl_len;
load.read = h_spl_load_read;
ret = spl_load_imx_container(spl_image, &load, sector);
} else {
ret = mmc_load_legacy(spl_image, mmc, sector, header);
}
end:
if (ret) {
#ifdef CONFIG_SPL_LIBCOMMON_SUPPORT
puts("mmc_load_image_raw_sector: mmc block read error\n");
#endif
return -1;
}
return 0;
}
static int spl_mmc_get_device_index(u32 boot_device)
{
switch (boot_device) {
case BOOT_DEVICE_MMC1:
return 0;
case BOOT_DEVICE_MMC2:
case BOOT_DEVICE_MMC2_2:
return 1;
}
#ifdef CONFIG_SPL_LIBCOMMON_SUPPORT
printf("spl: unsupported mmc boot device.\n");
#endif
return -ENODEV;
}
static int spl_mmc_find_device(struct mmc **mmcp, u32 boot_device)
{
int err, mmc_dev;
mmc_dev = spl_mmc_get_device_index(boot_device);
if (mmc_dev < 0)
return mmc_dev;
#if CONFIG_IS_ENABLED(DM_MMC)
err = mmc_init_device(mmc_dev);
#else
err = mmc_initialize(NULL);
#endif /* DM_MMC */
if (err) {
#ifdef CONFIG_SPL_LIBCOMMON_SUPPORT
printf("spl: could not initialize mmc. error: %d\n", err);
#endif
return err;
}
*mmcp = find_mmc_device(mmc_dev);
err = *mmcp ? 0 : -ENODEV;
if (err) {
#ifdef CONFIG_SPL_LIBCOMMON_SUPPORT
printf("spl: could not find mmc device %d. error: %d\n",
mmc_dev, err);
#endif
return err;
}
return 0;
}
#ifdef CONFIG_SYS_MMCSD_RAW_MODE_U_BOOT_USE_PARTITION
static int mmc_load_image_raw_partition(struct spl_image_info *spl_image,
struct mmc *mmc, int partition,
unsigned long sector)
{
disk_partition_t info;
int err;
#ifdef CONFIG_SYS_MMCSD_RAW_MODE_U_BOOT_USE_PARTITION_TYPE
int type_part;
/* Only support MBR so DOS_ENTRY_NUMBERS */
for (type_part = 1; type_part <= DOS_ENTRY_NUMBERS; type_part++) {
err = part_get_info(mmc_get_blk_desc(mmc), type_part, &info);
if (err)
continue;
if (info.sys_ind ==
CONFIG_SYS_MMCSD_RAW_MODE_U_BOOT_PARTITION_TYPE) {
partition = type_part;
break;
}
}
#endif
err = part_get_info(mmc_get_blk_desc(mmc), partition, &info);
if (err) {
#ifdef CONFIG_SPL_LIBCOMMON_SUPPORT
puts("spl: partition error\n");
#endif
return -1;
}
#ifdef CONFIG_SYS_MMCSD_RAW_MODE_U_BOOT_USE_SECTOR
return mmc_load_image_raw_sector(spl_image, mmc, info.start + sector);
#else
return mmc_load_image_raw_sector(spl_image, mmc, info.start);
#endif
}
#endif
#ifdef CONFIG_SPL_OS_BOOT
static int mmc_load_image_raw_os(struct spl_image_info *spl_image,
struct mmc *mmc)
{
int ret;
#if defined(CONFIG_SYS_MMCSD_RAW_MODE_ARGS_SECTOR)
unsigned long count;
count = blk_dread(mmc_get_blk_desc(mmc),
CONFIG_SYS_MMCSD_RAW_MODE_ARGS_SECTOR,
CONFIG_SYS_MMCSD_RAW_MODE_ARGS_SECTORS,
(void *) CONFIG_SYS_SPL_ARGS_ADDR);
if (count != CONFIG_SYS_MMCSD_RAW_MODE_ARGS_SECTORS) {
#ifdef CONFIG_SPL_LIBCOMMON_SUPPORT
puts("mmc_load_image_raw_os: mmc block read error\n");
#endif
return -1;
}
#endif /* CONFIG_SYS_MMCSD_RAW_MODE_ARGS_SECTOR */
ret = mmc_load_image_raw_sector(spl_image, mmc,
CONFIG_SYS_MMCSD_RAW_MODE_KERNEL_SECTOR);
if (ret)
return ret;
if (spl_image->os != IH_OS_LINUX) {
puts("Expected Linux image is not found. Trying to start U-boot\n");
return -ENOENT;
}
return 0;
}
#else
int spl_start_uboot(void)
{
return 1;
}
static int mmc_load_image_raw_os(struct spl_image_info *spl_image,
struct mmc *mmc)
{
return -ENOSYS;
}
#endif
#ifdef CONFIG_SYS_MMCSD_FS_BOOT_PARTITION
static int spl_mmc_do_fs_boot(struct spl_image_info *spl_image, struct mmc *mmc,
const char *filename)
{
int err = -ENOSYS;
#ifdef CONFIG_SPL_FS_FAT
if (!spl_start_uboot()) {
err = spl_load_image_fat_os(spl_image, mmc_get_blk_desc(mmc),
CONFIG_SYS_MMCSD_FS_BOOT_PARTITION);
if (!err)
return err;
}
#ifdef CONFIG_SPL_FS_LOAD_PAYLOAD_NAME
err = spl_load_image_fat(spl_image, mmc_get_blk_desc(mmc),
CONFIG_SYS_MMCSD_FS_BOOT_PARTITION,
filename);
if (!err)
return err;
#endif
#endif
#ifdef CONFIG_SPL_FS_EXT4
if (!spl_start_uboot()) {
err = spl_load_image_ext_os(spl_image, mmc_get_blk_desc(mmc),
CONFIG_SYS_MMCSD_FS_BOOT_PARTITION);
if (!err)
return err;
}
#ifdef CONFIG_SPL_FS_LOAD_PAYLOAD_NAME
err = spl_load_image_ext(spl_image, mmc_get_blk_desc(mmc),
CONFIG_SYS_MMCSD_FS_BOOT_PARTITION,
filename);
if (!err)
return err;
#endif
#endif
#if defined(CONFIG_SPL_FS_FAT) || defined(CONFIG_SPL_FS_EXT4)
err = -ENOENT;
#endif
return err;
}
#else
static int spl_mmc_do_fs_boot(struct spl_image_info *spl_image, struct mmc *mmc,
const char *filename)
{
return -ENOSYS;
}
#endif
u32 __weak spl_boot_mode(const u32 boot_device)
{
#if defined(CONFIG_SPL_FS_FAT) || defined(CONFIG_SPL_FS_EXT4)
return MMCSD_MODE_FS;
#elif defined(CONFIG_SUPPORT_EMMC_BOOT)
return MMCSD_MODE_EMMCBOOT;
#else
return MMCSD_MODE_RAW;
#endif
}
#ifdef CONFIG_SYS_MMCSD_RAW_MODE_U_BOOT_USE_PARTITION
__weak
int spl_boot_partition(const u32 boot_device)
{
return CONFIG_SYS_MMCSD_RAW_MODE_U_BOOT_PARTITION;
}
#endif
unsigned long __weak spl_mmc_get_uboot_raw_sector(struct mmc *mmc)
{
#ifdef CONFIG_SYS_MMCSD_RAW_MODE_U_BOOT_SECTOR
return CONFIG_SYS_MMCSD_RAW_MODE_U_BOOT_SECTOR;
#else
return 0;
#endif
}
int spl_mmc_load(struct spl_image_info *spl_image,
struct spl_boot_device *bootdev,
const char *filename,
int raw_part,
unsigned long raw_sect)
{
static struct mmc *mmc;
u32 boot_mode;
int err = 0;
__maybe_unused int part = 0;
/* Perform peripheral init only once */
if (!mmc) {
err = spl_mmc_find_device(&mmc, bootdev->boot_device);
if (err)
return err;
err = mmc_init(mmc);
if (err) {
mmc = NULL;
#ifdef CONFIG_SPL_LIBCOMMON_SUPPORT
printf("spl: mmc init failed with error: %d\n", err);
#endif
return err;
}
}
boot_mode = spl_boot_mode(bootdev->boot_device);
err = -EINVAL;
switch (boot_mode) {
case MMCSD_MODE_EMMCBOOT:
#ifdef CONFIG_SYS_MMCSD_RAW_MODE_EMMC_BOOT_PARTITION
part = CONFIG_SYS_MMCSD_RAW_MODE_EMMC_BOOT_PARTITION;
#else
/*
* We need to check what the partition is configured to.
* 1 and 2 match up to boot0 / boot1 and 7 is user data
* which is the first physical partition (0).
*/
part = (mmc->part_config >> 3) & PART_ACCESS_MASK;
if (part == 7)
part = 0;
#endif
if (CONFIG_IS_ENABLED(MMC_TINY))
err = mmc_switch_part(mmc, part);
else
err = blk_dselect_hwpart(mmc_get_blk_desc(mmc), part);
if (err) {
#ifdef CONFIG_SPL_LIBCOMMON_SUPPORT
puts("spl: mmc partition switch failed\n");
#endif
return err;
}
/* Fall through */
case MMCSD_MODE_RAW:
debug("spl: mmc boot mode: raw\n");
if (!spl_start_uboot()) {
err = mmc_load_image_raw_os(spl_image, mmc);
if (!err)
return err;
}
raw_sect = spl_mmc_get_uboot_raw_sector(mmc);
#ifdef CONFIG_SYS_MMCSD_RAW_MODE_U_BOOT_USE_PARTITION
err = mmc_load_image_raw_partition(spl_image, mmc, raw_part,
raw_sect);
if (!err)
return err;
#endif
#ifdef CONFIG_SYS_MMCSD_RAW_MODE_U_BOOT_USE_SECTOR
err = mmc_load_image_raw_sector(spl_image, mmc,
raw_sect + spl_mmc_raw_uboot_offset(part));
if (!err)
return err;
#endif
/* If RAW mode fails, try FS mode. */
case MMCSD_MODE_FS:
debug("spl: mmc boot mode: fs\n");
err = spl_mmc_do_fs_boot(spl_image, mmc, filename);
if (!err)
return err;
break;
#ifdef CONFIG_SPL_LIBCOMMON_SUPPORT
default:
puts("spl: mmc: wrong boot mode\n");
#endif
}
return err;
}
int spl_mmc_load_image(struct spl_image_info *spl_image,
struct spl_boot_device *bootdev)
{
return spl_mmc_load(spl_image, bootdev,
#ifdef CONFIG_SPL_FS_LOAD_PAYLOAD_NAME
CONFIG_SPL_FS_LOAD_PAYLOAD_NAME,
#else
NULL,
#endif
#ifdef CONFIG_SYS_MMCSD_RAW_MODE_U_BOOT_PARTITION
spl_boot_partition(bootdev->boot_device),
#else
0,
#endif
#ifdef CONFIG_SYS_MMCSD_RAW_MODE_U_BOOT_SECTOR
CONFIG_SYS_MMCSD_RAW_MODE_U_BOOT_SECTOR);
#else
0);
#endif
}
SPL_LOAD_IMAGE_METHOD("MMC1", 0, BOOT_DEVICE_MMC1, spl_mmc_load_image);
SPL_LOAD_IMAGE_METHOD("MMC2", 0, BOOT_DEVICE_MMC2, spl_mmc_load_image);
SPL_LOAD_IMAGE_METHOD("MMC2_2", 0, BOOT_DEVICE_MMC2_2, spl_mmc_load_image);
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