diff options
| author | Mike Lockwood <lockwood@android.com> | 2011-12-02 13:58:28 +0800 |
|---|---|---|
| committer | John Stultz <john.stultz@linaro.org> | 2012-02-14 14:27:21 -0800 |
| commit | 50a06d0cff576c7cdf99f5fcbc8fa659b0773a3c (patch) | |
| tree | bea5ace0a36fb20bf2abdcef1d4365ccfd35d787 /include | |
| parent | dc5181a7ffacc4c109dbd2b0e39e1b81c314cfeb (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')
| -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 fdf828c4925..7422b17c6eb 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 */ |