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2a981dc2c6
To ease conversion to driver model, add helper functions which deal with calling each block device method. With driver model we can reimplement these functions with the same arguments. Use inline functions to avoid increasing code size on some boards. Signed-off-by: Simon Glass <sjg@chromium.org> Reviewed-by: Bin Meng <bmeng.cn@gmail.com> Tested-by: Stephen Warren <swarren@nvidia.com>
103 lines
2.9 KiB
C
103 lines
2.9 KiB
C
/*
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* (C) Copyright 2000-2004
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* Wolfgang Denk, DENX Software Engineering, wd@denx.de.
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*
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* SPDX-License-Identifier: GPL-2.0+
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*/
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#ifndef BLK_H
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#define BLK_H
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#ifdef CONFIG_SYS_64BIT_LBA
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typedef uint64_t lbaint_t;
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#define LBAFlength "ll"
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#else
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typedef ulong lbaint_t;
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#define LBAFlength "l"
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#endif
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#define LBAF "%" LBAFlength "x"
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#define LBAFU "%" LBAFlength "u"
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/* Interface types: */
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enum if_type {
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IF_TYPE_UNKNOWN = 0,
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IF_TYPE_IDE,
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IF_TYPE_SCSI,
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IF_TYPE_ATAPI,
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IF_TYPE_USB,
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IF_TYPE_DOC,
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IF_TYPE_MMC,
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IF_TYPE_SD,
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IF_TYPE_SATA,
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IF_TYPE_HOST,
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IF_TYPE_COUNT, /* Number of interface types */
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};
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struct blk_desc {
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enum if_type if_type; /* type of the interface */
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int devnum; /* device number */
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unsigned char part_type; /* partition type */
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unsigned char target; /* target SCSI ID */
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unsigned char lun; /* target LUN */
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unsigned char hwpart; /* HW partition, e.g. for eMMC */
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unsigned char type; /* device type */
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unsigned char removable; /* removable device */
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#ifdef CONFIG_LBA48
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/* device can use 48bit addr (ATA/ATAPI v7) */
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unsigned char lba48;
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#endif
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lbaint_t lba; /* number of blocks */
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unsigned long blksz; /* block size */
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int log2blksz; /* for convenience: log2(blksz) */
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char vendor[40+1]; /* IDE model, SCSI Vendor */
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char product[20+1]; /* IDE Serial no, SCSI product */
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char revision[8+1]; /* firmware revision */
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unsigned long (*block_read)(struct blk_desc *block_dev,
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lbaint_t start,
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lbaint_t blkcnt,
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void *buffer);
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unsigned long (*block_write)(struct blk_desc *block_dev,
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lbaint_t start,
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lbaint_t blkcnt,
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const void *buffer);
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unsigned long (*block_erase)(struct blk_desc *block_dev,
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lbaint_t start,
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lbaint_t blkcnt);
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void *priv; /* driver private struct pointer */
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};
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#define BLOCK_CNT(size, blk_desc) (PAD_COUNT(size, blk_desc->blksz))
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#define PAD_TO_BLOCKSIZE(size, blk_desc) \
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(PAD_SIZE(size, blk_desc->blksz))
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/*
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* These functions should take struct udevice instead of struct blk_desc,
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* but this is convenient for migration to driver model. Add a 'd' prefix
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* to the function operations, so that blk_read(), etc. can be reserved for
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* functions with the correct arguments.
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*/
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static inline ulong blk_dread(struct blk_desc *block_dev, lbaint_t start,
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lbaint_t blkcnt, void *buffer)
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{
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/*
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* We could check if block_read is NULL and return -ENOSYS. But this
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* bloats the code slightly (cause some board to fail to build), and
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* it would be an error to try an operation that does not exist.
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*/
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return block_dev->block_read(block_dev, start, blkcnt, buffer);
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}
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static inline ulong blk_dwrite(struct blk_desc *block_dev, lbaint_t start,
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lbaint_t blkcnt, const void *buffer)
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{
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return block_dev->block_write(block_dev, start, blkcnt, buffer);
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}
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static inline ulong blk_derase(struct blk_desc *block_dev, lbaint_t start,
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lbaint_t blkcnt)
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{
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return block_dev->block_erase(block_dev, start, blkcnt);
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}
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#endif
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