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authorSimon Glass <sjg@chromium.org>2016-02-29 15:25:39 -0700
committerSimon Glass <sjg@chromium.org>2016-03-14 15:34:50 -0600
commit1a73661bc7a7ad2d741f7d7519872ca18231598c (patch)
treeba8fe6e6310397ec39c523220a6095d6ebba8033 /include/blk.h
parent481922f14a4801bd5abfb90705ebcaf76bd90df8 (diff)
dm: Add a new header for block devices
At present block devices are tied up with partitions. But not all block devices have partitions within them. They are in fact separate concepts. Create a separate blk.h header file for block devices. Signed-off-by: Simon Glass <sjg@chromium.org> Reviewed-by: Bin Meng <bmeng.cn@gmail.com> Tested-by: Stephen Warren <swarren@nvidia.com>
Diffstat (limited to 'include/blk.h')
-rw-r--r--include/blk.h71
1 files changed, 71 insertions, 0 deletions
diff --git a/include/blk.h b/include/blk.h
new file mode 100644
index 00000000000..1e8334c23a4
--- /dev/null
+++ b/include/blk.h
@@ -0,0 +1,71 @@
+/*
+ * (C) Copyright 2000-2004
+ * Wolfgang Denk, DENX Software Engineering, wd@denx.de.
+ *
+ * SPDX-License-Identifier: GPL-2.0+
+ */
+
+#ifndef BLK_H
+#define BLK_H
+
+#ifdef CONFIG_SYS_64BIT_LBA
+typedef uint64_t lbaint_t;
+#define LBAFlength "ll"
+#else
+typedef ulong lbaint_t;
+#define LBAFlength "l"
+#endif
+#define LBAF "%" LBAFlength "x"
+#define LBAFU "%" LBAFlength "u"
+
+/* Interface types: */
+#define IF_TYPE_UNKNOWN 0
+#define IF_TYPE_IDE 1
+#define IF_TYPE_SCSI 2
+#define IF_TYPE_ATAPI 3
+#define IF_TYPE_USB 4
+#define IF_TYPE_DOC 5
+#define IF_TYPE_MMC 6
+#define IF_TYPE_SD 7
+#define IF_TYPE_SATA 8
+#define IF_TYPE_HOST 9
+#define IF_TYPE_MAX 10 /* Max number of IF_TYPE_* supported */
+
+struct blk_desc {
+ int if_type; /* type of the interface */
+ int dev; /* device number */
+ unsigned char part_type; /* partition type */
+ unsigned char target; /* target SCSI ID */
+ unsigned char lun; /* target LUN */
+ unsigned char hwpart; /* HW partition, e.g. for eMMC */
+ unsigned char type; /* device type */
+ unsigned char removable; /* removable device */
+#ifdef CONFIG_LBA48
+ /* device can use 48bit addr (ATA/ATAPI v7) */
+ unsigned char lba48;
+#endif
+ lbaint_t lba; /* number of blocks */
+ unsigned long blksz; /* block size */
+ int log2blksz; /* for convenience: log2(blksz) */
+ char vendor[40+1]; /* IDE model, SCSI Vendor */
+ char product[20+1]; /* IDE Serial no, SCSI product */
+ char revision[8+1]; /* firmware revision */
+ unsigned long (*block_read)(struct blk_desc *block_dev,
+ lbaint_t start,
+ lbaint_t blkcnt,
+ void *buffer);
+ unsigned long (*block_write)(struct blk_desc *block_dev,
+ lbaint_t start,
+ lbaint_t blkcnt,
+ const void *buffer);
+ unsigned long (*block_erase)(struct blk_desc *block_dev,
+ lbaint_t start,
+ lbaint_t blkcnt);
+ void *priv; /* driver private struct pointer */
+};
+
+#define BLOCK_CNT(size, blk_desc) (PAD_COUNT(size, blk_desc->blksz))
+#define PAD_TO_BLOCKSIZE(size, blk_desc) \
+ (PAD_SIZE(size, blk_desc->blksz))
+
+#endif