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@@ -19,6 +19,8 @@ typedef ulong lbaint_t;
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#define LBAF "%" LBAFlength "x"
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#define LBAF "%" LBAFlength "x"
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#define LBAFU "%" LBAFlength "u"
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#define LBAFU "%" LBAFlength "u"
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+struct udevice;
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+
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/* Interface types: */
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/* Interface types: */
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enum if_type {
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enum if_type {
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IF_TYPE_UNKNOWN = 0,
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IF_TYPE_UNKNOWN = 0,
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@@ -683,4 +685,58 @@ const char *blk_get_if_type_name(enum if_type if_type);
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int blk_common_cmd(int argc, char *const argv[], enum if_type if_type,
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int blk_common_cmd(int argc, char *const argv[], enum if_type if_type,
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int *cur_devnump);
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int *cur_devnump);
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+enum blk_flag_t {
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+ BLKF_FIXED = 1 << 0,
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+ BLKF_REMOVABLE = 1 << 1,
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+ BLKF_BOTH = BLKF_FIXED | BLKF_REMOVABLE,
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+};
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+
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+/**
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+ * blk_first_device_err() - Get the first block device
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+ *
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+ * The device returned is probed if necessary, and ready for use
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+ *
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+ * @flags: Indicates type of device to return
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+ * @devp: Returns pointer to the first device in that uclass, or NULL if none
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+ * @return 0 if found, -ENODEV if not found, other -ve on error
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+ */
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+int blk_first_device_err(enum blk_flag_t flags, struct udevice **devp);
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+
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+/**
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+ * blk_next_device_err() - Get the next block device
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+ *
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+ * The device returned is probed if necessary, and ready for use
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+ *
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+ * @flags: Indicates type of device to return
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+ * @devp: On entry, pointer to device to lookup. On exit, returns pointer
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+ * to the next device in the uclass if no error occurred, or -ENODEV if
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+ * there is no next device.
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+ * @return 0 if found, -ENODEV if not found, other -ve on error
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+ */
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+int blk_next_device_err(enum blk_flag_t flags, struct udevice **devp);
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+
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+/**
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+ * blk_foreach_probe() - Helper function to iteration through block devices
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+ *
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+ * This creates a for() loop which works through the available devices in
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+ * a uclass in order from start to end. Devices are probed if necessary,
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+ * and ready for use.
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+ *
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+ * @flags: Indicates type of device to return
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+ * @dev: struct udevice * to hold the current device. Set to NULL when there
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+ * are no more devices.
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+ */
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+#define blk_foreach_probe(flags, pos) \
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+ for (int _ret = blk_first_device_err(flags, &(pos)); \
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+ !_ret && pos; \
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+ _ret = blk_next_device_err(flags, &(pos)))
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+
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+/**
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+ * blk_count_devices() - count the number of devices of a particular type
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+ *
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+ * @flags: Indicates type of device to find
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+ * @return number of devices matching those flags
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+ */
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+int blk_count_devices(enum blk_flag_t flag);
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+
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#endif
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#endif
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