1da177e4c3
Initial git repository build. I'm not bothering with the full history, even though we have it. We can create a separate "historical" git archive of that later if we want to, and in the meantime it's about 3.2GB when imported into git - space that would just make the early git days unnecessarily complicated, when we don't have a lot of good infrastructure for it. Let it rip!
147 lines
3.5 KiB
C
147 lines
3.5 KiB
C
/* $Id: console.c,v 1.9 1997/10/29 07:41:43 ecd Exp $
|
|
* console.c: Routines that deal with sending and receiving IO
|
|
* to/from the current console device using the PROM.
|
|
*
|
|
* Copyright (C) 1995 David S. Miller (davem@caip.rutgers.edu)
|
|
* Copyright (C) 1996,1997 Jakub Jelinek (jj@sunsite.mff.cuni.cz)
|
|
*/
|
|
|
|
#include <linux/types.h>
|
|
#include <linux/kernel.h>
|
|
#include <linux/sched.h>
|
|
#include <asm/openprom.h>
|
|
#include <asm/oplib.h>
|
|
#include <asm/system.h>
|
|
#include <linux/string.h>
|
|
|
|
extern int prom_stdin, prom_stdout;
|
|
|
|
/* Non blocking get character from console input device, returns -1
|
|
* if no input was taken. This can be used for polling.
|
|
*/
|
|
__inline__ int
|
|
prom_nbgetchar(void)
|
|
{
|
|
char inc;
|
|
|
|
if (p1275_cmd("read", P1275_ARG(1,P1275_ARG_OUT_BUF)|
|
|
P1275_INOUT(3,1),
|
|
prom_stdin, &inc, P1275_SIZE(1)) == 1)
|
|
return inc;
|
|
else
|
|
return -1;
|
|
}
|
|
|
|
/* Non blocking put character to console device, returns -1 if
|
|
* unsuccessful.
|
|
*/
|
|
__inline__ int
|
|
prom_nbputchar(char c)
|
|
{
|
|
char outc;
|
|
|
|
outc = c;
|
|
if (p1275_cmd("write", P1275_ARG(1,P1275_ARG_IN_BUF)|
|
|
P1275_INOUT(3,1),
|
|
prom_stdout, &outc, P1275_SIZE(1)) == 1)
|
|
return 0;
|
|
else
|
|
return -1;
|
|
}
|
|
|
|
/* Blocking version of get character routine above. */
|
|
char
|
|
prom_getchar(void)
|
|
{
|
|
int character;
|
|
while((character = prom_nbgetchar()) == -1) ;
|
|
return (char) character;
|
|
}
|
|
|
|
/* Blocking version of put character routine above. */
|
|
void
|
|
prom_putchar(char c)
|
|
{
|
|
prom_nbputchar(c);
|
|
return;
|
|
}
|
|
|
|
void
|
|
prom_puts(char *s, int len)
|
|
{
|
|
p1275_cmd("write", P1275_ARG(1,P1275_ARG_IN_BUF)|
|
|
P1275_INOUT(3,1),
|
|
prom_stdout, s, P1275_SIZE(len));
|
|
}
|
|
|
|
/* Query for input device type */
|
|
enum prom_input_device
|
|
prom_query_input_device(void)
|
|
{
|
|
int st_p;
|
|
char propb[64];
|
|
|
|
st_p = prom_inst2pkg(prom_stdin);
|
|
if(prom_node_has_property(st_p, "keyboard"))
|
|
return PROMDEV_IKBD;
|
|
prom_getproperty(st_p, "device_type", propb, sizeof(propb));
|
|
if(strncmp(propb, "serial", 6))
|
|
return PROMDEV_I_UNK;
|
|
/* FIXME: Is there any better way how to find out? */
|
|
memset(propb, 0, sizeof(propb));
|
|
st_p = prom_finddevice ("/options");
|
|
prom_getproperty(st_p, "input-device", propb, sizeof(propb));
|
|
|
|
/*
|
|
* If we get here with propb == 'keyboard', we are on ttya, as
|
|
* the PROM defaulted to this due to 'no input device'.
|
|
*/
|
|
if (!strncmp(propb, "keyboard", 8))
|
|
return PROMDEV_ITTYA;
|
|
|
|
if (strncmp (propb, "tty", 3) || !propb[3])
|
|
return PROMDEV_I_UNK;
|
|
switch (propb[3]) {
|
|
case 'a': return PROMDEV_ITTYA;
|
|
case 'b': return PROMDEV_ITTYB;
|
|
default: return PROMDEV_I_UNK;
|
|
}
|
|
}
|
|
|
|
/* Query for output device type */
|
|
|
|
enum prom_output_device
|
|
prom_query_output_device(void)
|
|
{
|
|
int st_p;
|
|
char propb[64];
|
|
int propl;
|
|
|
|
st_p = prom_inst2pkg(prom_stdout);
|
|
propl = prom_getproperty(st_p, "device_type", propb, sizeof(propb));
|
|
if (propl >= 0 && propl == sizeof("display") &&
|
|
strncmp("display", propb, sizeof("display")) == 0)
|
|
return PROMDEV_OSCREEN;
|
|
if(strncmp("serial", propb, 6))
|
|
return PROMDEV_O_UNK;
|
|
/* FIXME: Is there any better way how to find out? */
|
|
memset(propb, 0, sizeof(propb));
|
|
st_p = prom_finddevice ("/options");
|
|
prom_getproperty(st_p, "output-device", propb, sizeof(propb));
|
|
|
|
/*
|
|
* If we get here with propb == 'screen', we are on ttya, as
|
|
* the PROM defaulted to this due to 'no input device'.
|
|
*/
|
|
if (!strncmp(propb, "screen", 6))
|
|
return PROMDEV_OTTYA;
|
|
|
|
if (strncmp (propb, "tty", 3) || !propb[3])
|
|
return PROMDEV_O_UNK;
|
|
switch (propb[3]) {
|
|
case 'a': return PROMDEV_OTTYA;
|
|
case 'b': return PROMDEV_OTTYB;
|
|
default: return PROMDEV_O_UNK;
|
|
}
|
|
}
|