linux-hardened/drivers/char/decserial.c
Maciej W. Rozycki 9399575dd3 [PATCH] dz: Fixes to make it work
This a set of fixes mostly to make the driver actually work:

1. Actually select the line for setting parameters and receiver
   disable/enable.
2. Select the line for receive and transmit interrupt handling correctly.
3. Report the transmitter empty state correctly.
4. Set the I/O type of ports correctly.
5. Perform polled transmission correctly.
6. Don't fix the console line at ttyS3.
7. Magic SysRq support.
8. Various small bits here and there.

Tested with a DECstation 2100 (thanks Flo for making this possible).

[akpm@osdl.org: fix typo]
Signed-off-by: Maciej W. Rozycki <macro@linux-mips.org>
Signed-off-by: Andrew Morton <akpm@osdl.org>
Signed-off-by: Linus Torvalds <torvalds@osdl.org>
2006-12-07 08:39:41 -08:00

67 lines
1.5 KiB
C

/*
* sercons.c
* choose the right serial device at boot time
*
* triemer 6-SEP-1998
* sercons.c is designed to allow the three different kinds
* of serial devices under the decstation world to co-exist
* in the same kernel. The idea here is to abstract
* the pieces of the drivers that are common to this file
* so that they do not clash at compile time and runtime.
*
* HK 16-SEP-1998 v0.002
* removed the PROM console as this is not a real serial
* device. Added support for PROM console in drivers/char/tty_io.c
* instead. Although it may work to enable more than one
* console device I strongly recommend to use only one.
*/
#include <linux/init.h>
#include <asm/dec/machtype.h>
#ifdef CONFIG_ZS
extern int zs_init(void);
#endif
#ifdef CONFIG_SERIAL_CONSOLE
#ifdef CONFIG_ZS
extern void zs_serial_console_init(void);
#endif
#endif
/* rs_init - starts up the serial interface -
handle normal case of starting up the serial interface */
#ifdef CONFIG_SERIAL
int __init rs_init(void)
{
#ifdef CONFIG_ZS
if (IOASIC)
return zs_init();
#endif
return -ENXIO;
}
__initcall(rs_init);
#endif
#ifdef CONFIG_SERIAL_CONSOLE
/* serial_console_init handles the special case of starting
* up the console on the serial port
*/
static int __init decserial_console_init(void)
{
#ifdef CONFIG_ZS
if (IOASIC)
zs_serial_console_init();
#endif
return 0;
}
console_initcall(decserial_console_init);
#endif