Convert CONFIG_SYS_LOAD_ADDR to Kconfig

[platform/kernel/u-boot.git] / include / blk.h

diff --git a/include/blk.h b/include/blk.h
index c4401b0..19bab08 100644 (file)
--- a/include/blk.h
+++ b/include/blk.h
@@ -19,6 +19,8 @@ typedef ulong lbaint_t;
 #define LBAF "%" LBAFlength "x"
 #define LBAFU "%" LBAFlength "u"
 
+struct udevice;
+
 /* Interface types: */
 enum if_type {
        IF_TYPE_UNKNOWN = 0,
@@ -683,4 +685,58 @@ const char *blk_get_if_type_name(enum if_type if_type);
 int blk_common_cmd(int argc, char *const argv[], enum if_type if_type,
                   int *cur_devnump);
 
+enum blk_flag_t {
+       BLKF_FIXED      = 1 << 0,
+       BLKF_REMOVABLE  = 1 << 1,
+       BLKF_BOTH       = BLKF_FIXED | BLKF_REMOVABLE,
+};
+
+/**
+ * blk_first_device_err() - Get the first block device
+ *
+ * The device returned is probed if necessary, and ready for use
+ *
+ * @flags: Indicates type of device to return
+ * @devp: Returns pointer to the first device in that uclass, or NULL if none
+ * @return 0 if found, -ENODEV if not found, other -ve on error
+ */
+int blk_first_device_err(enum blk_flag_t flags, struct udevice **devp);
+
+/**
+ * blk_next_device_err() - Get the next block device
+ *
+ * The device returned is probed if necessary, and ready for use
+ *
+ * @flags: Indicates type of device to return
+ * @devp: On entry, pointer to device to lookup. On exit, returns pointer
+ * to the next device in the uclass if no error occurred, or -ENODEV if
+ * there is no next device.
+ * @return 0 if found, -ENODEV if not found, other -ve on error
+ */
+int blk_next_device_err(enum blk_flag_t flags, struct udevice **devp);
+
+/**
+ * blk_foreach_probe() - Helper function to iteration through block devices
+ *
+ * This creates a for() loop which works through the available devices in
+ * a uclass in order from start to end. Devices are probed if necessary,
+ * and ready for use.
+ *
+ * @flags: Indicates type of device to return
+ * @dev: struct udevice * to hold the current device. Set to NULL when there
+ * are no more devices.
+ */
+#define blk_foreach_probe(flags, pos)  \
+       for (int _ret = blk_first_device_err(flags, &(pos)); \
+            !_ret && pos; \
+            _ret = blk_next_device_err(flags, &(pos)))
+
+/**
+ * blk_count_devices() - count the number of devices of a particular type
+ *
+ * @flags: Indicates type of device to find
+ * @return number of devices matching those flags
+ */
+int blk_count_devices(enum blk_flag_t flag);
+
 #endif