1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
18
19
20
21
22
23
24
25
26
27
28
29
30
31
32
33
34
35
36
37
38
39
40
41
42
43
44
45
46
47
48
49
50
51
52
53
54
55
56
57
58
59
60
61
62
63
64
65
66
67
68
69
70
71
72
73
74
75
76
77
78
79
80
81
82
83
84
85
86
87
88
89
90
91
92
93
94
95
96
97
98
99
100
101
102
103
104
105
106
107
108
109
110
111
112
113
114
115
116
117
118
119
120
121
122
123
124
125
126
127
128
129
130
131
132
133
134
135
136
137
138
139
140
141
142
143
144
145
146
147
148
149
150
151
152
153
154
|
/* $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(const 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, "rsc", 3))
return PROMDEV_IRSC;
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, "rsc", 3))
return PROMDEV_ORSC;
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;
}
}
|
