diff options
| author | Mike Lockwood <lockwood@android.com> | 2011-07-14 19:42:42 -0400 |
|---|---|---|
| committer | Dan Willemsen <dwillemsen@nvidia.com> | 2011-11-30 21:38:50 -0800 |
| commit | 761f7c709ed7c3afad269613e06df03d023d8d1c (patch) | |
| tree | a53e60173ea1a964f2adb93c91935471ed5e5b7f /include/linux/usb | |
| parent | 0a6e4edfda61241634e810b8319a0879ed651f25 (diff) | |
USB: gadget: f_mtp: Add support for sending MTP header during file transfer
MTP_SEND_FILE_WITH_HEADER ioctl allows sending a file with the 12 byte header
prepended at the beginning.
This is to allow MTP to use a single packet for the data phase instead of two.
Signed-off-by: Mike Lockwood <lockwood@android.com>
Diffstat (limited to 'include/linux/usb')
| -rw-r--r-- | include/linux/usb/f_mtp.h | 28 |
1 files changed, 28 insertions, 0 deletions
diff --git a/include/linux/usb/f_mtp.h b/include/linux/usb/f_mtp.h index fdf828c49250..7422b17c6eb1 100644 --- a/include/linux/usb/f_mtp.h +++ b/include/linux/usb/f_mtp.h @@ -18,6 +18,22 @@ #ifndef __LINUX_USB_F_MTP_H #define __LINUX_USB_F_MTP_H +#include <linux/ioctl.h> + +#ifdef __KERNEL__ + +struct mtp_data_header { + /* length of packet, including this header */ + uint32_t length; + /* container type (2 for data packet) */ + uint16_t type; + /* MTP command code */ + uint16_t command; + /* MTP transaction ID */ + uint32_t transaction_id; +}; + +#endif /* __KERNEL__ */ struct mtp_file_range { /* file descriptor for file to transfer */ @@ -26,6 +42,14 @@ struct mtp_file_range { loff_t offset; /* number of bytes to transfer */ int64_t length; + /* MTP command ID for data header, + * used only for MTP_SEND_FILE_WITH_HEADER + */ + uint16_t command; + /* MTP transaction ID for data header, + * used only for MTP_SEND_FILE_WITH_HEADER + */ + uint32_t transaction_id; }; struct mtp_event { @@ -43,5 +67,9 @@ struct mtp_event { #define MTP_RECEIVE_FILE _IOW('M', 1, struct mtp_file_range) /* Sends an event to the host via the interrupt endpoint */ #define MTP_SEND_EVENT _IOW('M', 3, struct mtp_event) +/* Sends the specified file range to the host, + * with a 12 byte MTP data packet header at the beginning. + */ +#define MTP_SEND_FILE_WITH_HEADER _IOW('M', 4, struct mtp_file_range) #endif /* __LINUX_USB_F_MTP_H */ |