diff options
| author | Guido Kiener <guido@kiener-muenchen.de> | 2018-09-12 10:50:59 +0200 |
|---|---|---|
| committer | Greg Kroah-Hartman <gregkh@linuxfoundation.org> | 2018-09-20 13:04:02 +0200 |
| commit | 8409e96f012a777ad9ca2050d567d766e43ec343 (patch) | |
| tree | 345d6495d0d6b359efbda43f7821cd501cdf57a9 /include/uapi/linux/usb/tmc.h | |
| parent | 739240a9f6ac4d4c841081029874b3521744e490 (diff) | |
usb: usbtmc: add ioctl USBTMC_IOCTL_MSG_IN_ATTR
add ioctl USBTMC_IOCTL_MSG_IN_ATTR that returns the specific
bmTransferAttributes field of the last DEV_DEP_MSG_IN Bulk-IN
header. This header is received by the read() function. The
meaning of the (u8) bitmap bmTransferAttributes is:
Bit 0 = EOM flag is set when the last transfer of a USBTMC
message is received.
Bit 1 = is set when the last byte is a termchar (e.g. '\n').
Note that this bit is always zero when the device does not support
the termchar feature or when termchar detection is not enabled
(see ioctl USBTMC_IOCTL_CONFIG_TERMCHAR).
Signed-off-by: Guido Kiener <guido.kiener@rohde-schwarz.com>
Reviewed-by: Steve Bayless <steve_bayless@keysight.com>
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
Diffstat (limited to 'include/uapi/linux/usb/tmc.h')
| -rw-r--r-- | include/uapi/linux/usb/tmc.h | 2 |
1 files changed, 2 insertions, 0 deletions
diff --git a/include/uapi/linux/usb/tmc.h b/include/uapi/linux/usb/tmc.h index e228ad7fc141..55ca365b66d4 100644 --- a/include/uapi/linux/usb/tmc.h +++ b/include/uapi/linux/usb/tmc.h @@ -98,6 +98,8 @@ struct usbtmc_message { #define USBTMC488_IOCTL_TRIGGER _IO(USBTMC_IOC_NR, 22) #define USBTMC488_IOCTL_WAIT_SRQ _IOW(USBTMC_IOC_NR, 23, __u32) +#define USBTMC_IOCTL_MSG_IN_ATTR _IOR(USBTMC_IOC_NR, 24, __u8) + /* Cancel and cleanup asynchronous calls */ #define USBTMC_IOCTL_CANCEL_IO _IO(USBTMC_IOC_NR, 35) #define USBTMC_IOCTL_CLEANUP_IO _IO(USBTMC_IOC_NR, 36) |