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/*
* Copyright (C) 2013 Samsung Electronics
* Lukasz Majewski <l.majewski@samsung.com>
*
* SPDX-License-Identifier: GPL-2.0+
*/
#include <common.h>
#include <usb_mass_storage.h>
#include <part.h>
static int ums_read_sector(struct ums *ums_dev,
ulong start, lbaint_t blkcnt, void *buf)
{
block_dev_desc_t *block_dev = &ums_dev->mmc->block_dev;
lbaint_t blkstart = start + ums_dev->start_sector;
int dev_num = block_dev->dev;
return block_dev->block_read(dev_num, blkstart, blkcnt, buf);
}
static int ums_write_sector(struct ums *ums_dev,
ulong start, lbaint_t blkcnt, const void *buf)
{
block_dev_desc_t *block_dev = &ums_dev->mmc->block_dev;
lbaint_t blkstart = start + ums_dev->start_sector;
int dev_num = block_dev->dev;
return block_dev->block_write(dev_num, blkstart, blkcnt, buf);
}
static struct ums ums_dev = {
.read_sector = ums_read_sector,
.write_sector = ums_write_sector,
.name = "UMS disk",
};
static struct ums *ums_disk_init(struct mmc *mmc)
{
uint64_t mmc_end_sector = mmc->capacity / SECTOR_SIZE;
uint64_t ums_end_sector = UMS_NUM_SECTORS + UMS_START_SECTOR;
if (!mmc_end_sector) {
error("MMC capacity is not valid");
return NULL;
}
ums_dev.mmc = mmc;
if (ums_end_sector <= mmc_end_sector) {
ums_dev.start_sector = UMS_START_SECTOR;
if (UMS_NUM_SECTORS)
ums_dev.num_sectors = UMS_NUM_SECTORS;
else
ums_dev.num_sectors = mmc_end_sector - UMS_START_SECTOR;
} else {
ums_dev.num_sectors = mmc_end_sector;
puts("UMS: defined bad disk parameters. Using default.\n");
}
printf("UMS: disk start sector: %#x, count: %#x\n",
ums_dev.start_sector, ums_dev.num_sectors);
return &ums_dev;
}
struct ums *ums_init(unsigned int dev_num)
{
struct mmc *mmc = find_mmc_device(dev_num);
if (!mmc || mmc_init(mmc))
return NULL;
return ums_disk_init(mmc);
}
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