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https://github.com/brain-hackers/u-boot-brain
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dc1e746c42
There's no reason to believe that an MMC device will incorrectly report its capacity. Remove error checking of this value from ums_disk_init() to simplify it. Cc: Lukasz Majewski <l.majewski@samsung.com> Signed-off-by: Stephen Warren <swarren@nvidia.com> Acked-by: Przemyslaw Marczak <p.marczak@samsung.com>
59 lines
1.4 KiB
C
59 lines
1.4 KiB
C
/*
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* Copyright (C) 2013 Samsung Electronics
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* Lukasz Majewski <l.majewski@samsung.com>
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*
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* SPDX-License-Identifier: GPL-2.0+
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*/
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#include <common.h>
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#include <usb_mass_storage.h>
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#include <mmc.h>
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#include <part.h>
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static int ums_read_sector(struct ums *ums_dev,
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ulong start, lbaint_t blkcnt, void *buf)
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{
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block_dev_desc_t *block_dev = ums_dev->block_dev;
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lbaint_t blkstart = start + ums_dev->start_sector;
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int dev_num = block_dev->dev;
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return block_dev->block_read(dev_num, blkstart, blkcnt, buf);
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}
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static int ums_write_sector(struct ums *ums_dev,
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ulong start, lbaint_t blkcnt, const void *buf)
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{
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block_dev_desc_t *block_dev = ums_dev->block_dev;
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lbaint_t blkstart = start + ums_dev->start_sector;
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int dev_num = block_dev->dev;
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return block_dev->block_write(dev_num, blkstart, blkcnt, buf);
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}
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static struct ums ums_dev = {
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.read_sector = ums_read_sector,
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.write_sector = ums_write_sector,
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.name = "UMS disk",
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};
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static struct ums *ums_disk_init(struct mmc *mmc)
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{
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ums_dev.block_dev = &mmc->block_dev;
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ums_dev.start_sector = 0;
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ums_dev.num_sectors = mmc->capacity / SECTOR_SIZE;
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printf("UMS: disk start sector: %#x, count: %#x\n",
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ums_dev.start_sector, ums_dev.num_sectors);
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return &ums_dev;
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}
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struct ums *ums_init(unsigned int dev_num)
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{
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struct mmc *mmc = find_mmc_device(dev_num);
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if (!mmc || mmc_init(mmc))
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return NULL;
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return ums_disk_init(mmc);
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}
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