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Commit e1eaea46 authored by Alan Cox's avatar Alan Cox Committed by Greg Kroah-Hartman
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tty: n_gsm line discipline 



Add an implementation of GSM 0710 MUX. The implementation currently supports

- Basic and advanced framing (as either end of the link)
- UI or UIH data frames
- Adaption layer 1-4 (1 and 2 via tty, 3 and 4 as skbuff lists)
- Modem and control messages including the correct retry process
- Flow control

and exposes the MUX channels as a set of virtual tty devices including modem
signals. This is an experimental driver.

Signed-off-by: default avatarAlan Cox <alan@linux.intel.com>
Signed-off-by: default avatarGreg Kroah-Hartman <gregkh@suse.de>
parent 1ff454ef

drivers/char/Kconfig

+8 −1
Original line number Diff line number Diff line
@@ -276,11 +276,18 @@ config N_HDLC 
	  Allows synchronous HDLC communications with tty device drivers that

	  support synchronous HDLC such as the Microgate SyncLink adapter.



	  This driver can only be built as a module ( = code which can be

	  This driver can be built as a module ( = code which can be

	  inserted in and removed from the running kernel whenever you want).

	  The module will be called n_hdlc. If you want to do that, say M

	  here.



config N_GSM

	tristate "GSM MUX line discipline support (EXPERIMENTAL)"

	depends on EXPERIMENTAL

	help

	  This line discipline provides support for the GSM MUX protocol and

	  presents the mux as a set of 61 individual tty devices.



config RISCOM8

	tristate "SDL RISCom/8 card support"

	depends on SERIAL_NONSTANDARD

drivers/char/Makefile

+1 −0
Original line number Diff line number Diff line
@@ -40,6 +40,7 @@ obj-$(CONFIG_SYNCLINK) += synclink.o 
obj-$(CONFIG_SYNCLINKMP)	+= synclinkmp.o

obj-$(CONFIG_SYNCLINK_GT)	+= synclink_gt.o

obj-$(CONFIG_N_HDLC)		+= n_hdlc.o

obj-$(CONFIG_N_GSM)		+= n_gsm.o

obj-$(CONFIG_AMIGA_BUILTIN_SERIAL) += amiserial.o

obj-$(CONFIG_SX)		+= sx.o generic_serial.o

obj-$(CONFIG_RIO)		+= rio/ generic_serial.o

drivers/char/n_gsm.c

0 → 100644
+2763 −0

File added.

Preview size limit exceeded, changes collapsed.

include/linux/gsmmux.h

0 → 100644
+25 −0
Original line number Diff line number Diff line 
#ifndef _LINUX_GSMMUX_H

#define _LINUX_GSMMUX_H



struct gsm_config

{

	unsigned int adaption;

	unsigned int encapsulation;

	unsigned int initiator;

	unsigned int t1;

	unsigned int t2;

	unsigned int t3;

	unsigned int n2;

	unsigned int mru;

	unsigned int mtu;

	unsigned int k;

	unsigned int i;

	unsigned int unused[8];		/* Padding for expansion without

					   breaking stuff */

};



#define GSMIOC_GETCONF		_IOR('G', 0, struct gsm_config)

#define GSMIOC_SETCONF		_IOW('G', 1, struct gsm_config)





#endif

include/linux/tty.h

+1 −0
Original line number Diff line number Diff line
@@ -48,6 +48,7 @@ 
#define N_PPS		18	/* Pulse per Second */

#define N_V253		19	/* Codec control over voice modem */

#define N_CAIF		20      /* CAIF protocol for talking to modems */

#define N_GSM0710	21	/* GSM 0710 Mux */



/*

 * This character is the same as _POSIX_VDISABLE: it cannot be used as