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| author | Okash Khawaja <okash.khawaja@gmail.com> | 2017-05-15 18:45:33 +0100 |
|---|---|---|
| committer | Greg Kroah-Hartman <gregkh@linuxfoundation.org> | 2017-05-16 14:05:42 +0200 |
| commit | 1ab92da32e37758c0e2e2a455f06d5f40609f14e (patch) | |
| tree | b18ad58e8088c5b731480c2155034f6edf590281 /include | |
| parent | 12e84c71b7d4ee38d51377fd494ac748ee4e6912 (diff) | |
| download | lwn-1ab92da32e37758c0e2e2a455f06d5f40609f14e.tar.gz lwn-1ab92da32e37758c0e2e2a455f06d5f40609f14e.zip | |
staging: speakup: add tty-based comms functions
This adds spk_ttyio.c file. It contains a set of functions which implement
those methods in spk_synth struct which relate to sending bytes out using
serial comms. Implementations in this file perform the same function but
using TTY subsystem instead. Currently synths access serial ports, directly
poking standard ISA ports by trying to steal them from serial driver. Some ISA
cards actually need this way of doing it, but most other synthesizers don't,
and can actually work by using the proper TTY subsystem through a new N_SPEAKUP
line discipline. So this adds the methods for drivers to switch to accessing
serial ports through the TTY subsystem, whenever appropriate.
Signed-off-by: Okash Khawaja <okash.khawaja@gmail.com>
Reviewed-by: Samuel Thibault <samuel.thibault@ens-lyon.org>
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
Diffstat (limited to 'include')
| -rw-r--r-- | include/uapi/linux/tty.h | 1 |
1 files changed, 1 insertions, 0 deletions
diff --git a/include/uapi/linux/tty.h b/include/uapi/linux/tty.h index 01c4410352ff..e7855dffd592 100644 --- a/include/uapi/linux/tty.h +++ b/include/uapi/linux/tty.h @@ -35,5 +35,6 @@ #define N_TRACESINK 23 /* Trace data routing for MIPI P1149.7 */ #define N_TRACEROUTER 24 /* Trace data routing for MIPI P1149.7 */ #define N_NCI 25 /* NFC NCI UART */ +#define N_SPEAKUP 26 /* Speakup communication with synths */ #endif /* _UAPI_LINUX_TTY_H */ |