diff options
Diffstat (limited to 'include/linux/usb/storage.h')
| -rw-r--r-- | include/linux/usb/storage.h | 10 |
1 files changed, 9 insertions, 1 deletions
diff --git a/include/linux/usb/storage.h b/include/linux/usb/storage.h index 2827ce72e502..51be3bb8fccb 100644 --- a/include/linux/usb/storage.h +++ b/include/linux/usb/storage.h @@ -53,7 +53,7 @@ struct bulk_cb_wrap { __le32 Signature; /* contains 'USBC' */ __u32 Tag; /* unique per command id */ __le32 DataTransferLength; /* size of data */ - __u8 Flags; /* direction in bit 0 */ + __u8 Flags; /* direction in bit 7 */ __u8 Lun; /* LUN normally 0 */ __u8 Length; /* length of the CDB */ __u8 CDB[16]; /* max command */ @@ -82,4 +82,12 @@ struct bulk_cs_wrap { #define US_BULK_RESET_REQUEST 0xff #define US_BULK_GET_MAX_LUN 0xfe +/* + * If 4 LUNs are supported then the LUNs would be + * numbered from 0 to 3, and the return value for + * US_BULK_GET_MAX_LUN request would be 3. The valid + * LUN field is 4 bits wide, the upper limit is 0x0f. + */ +#define US_BULK_MAX_LUN_LIMIT 0x0f + #endif |