]>
Commit | Line | Data |
---|---|---|
1da177e4 LT |
1 | /* $Id: console.c,v 1.9 1997/10/29 07:41:43 ecd Exp $ |
2 | * console.c: Routines that deal with sending and receiving IO | |
3 | * to/from the current console device using the PROM. | |
4 | * | |
5 | * Copyright (C) 1995 David S. Miller (davem@caip.rutgers.edu) | |
6 | * Copyright (C) 1996,1997 Jakub Jelinek (jj@sunsite.mff.cuni.cz) | |
7 | */ | |
8 | ||
9 | #include <linux/types.h> | |
10 | #include <linux/kernel.h> | |
11 | #include <linux/sched.h> | |
12 | #include <asm/openprom.h> | |
13 | #include <asm/oplib.h> | |
14 | #include <asm/system.h> | |
15 | #include <linux/string.h> | |
16 | ||
17 | extern int prom_stdin, prom_stdout; | |
18 | ||
19 | /* Non blocking get character from console input device, returns -1 | |
20 | * if no input was taken. This can be used for polling. | |
21 | */ | |
22 | __inline__ int | |
23 | prom_nbgetchar(void) | |
24 | { | |
25 | char inc; | |
26 | ||
27 | if (p1275_cmd("read", P1275_ARG(1,P1275_ARG_OUT_BUF)| | |
28 | P1275_INOUT(3,1), | |
29 | prom_stdin, &inc, P1275_SIZE(1)) == 1) | |
30 | return inc; | |
31 | else | |
32 | return -1; | |
33 | } | |
34 | ||
35 | /* Non blocking put character to console device, returns -1 if | |
36 | * unsuccessful. | |
37 | */ | |
38 | __inline__ int | |
39 | prom_nbputchar(char c) | |
40 | { | |
41 | char outc; | |
42 | ||
43 | outc = c; | |
44 | if (p1275_cmd("write", P1275_ARG(1,P1275_ARG_IN_BUF)| | |
45 | P1275_INOUT(3,1), | |
46 | prom_stdout, &outc, P1275_SIZE(1)) == 1) | |
47 | return 0; | |
48 | else | |
49 | return -1; | |
50 | } | |
51 | ||
52 | /* Blocking version of get character routine above. */ | |
53 | char | |
54 | prom_getchar(void) | |
55 | { | |
56 | int character; | |
57 | while((character = prom_nbgetchar()) == -1) ; | |
58 | return (char) character; | |
59 | } | |
60 | ||
61 | /* Blocking version of put character routine above. */ | |
62 | void | |
63 | prom_putchar(char c) | |
64 | { | |
65 | prom_nbputchar(c); | |
66 | return; | |
67 | } | |
68 | ||
69 | void | |
70 | prom_puts(char *s, int len) | |
71 | { | |
72 | p1275_cmd("write", P1275_ARG(1,P1275_ARG_IN_BUF)| | |
73 | P1275_INOUT(3,1), | |
74 | prom_stdout, s, P1275_SIZE(len)); | |
75 | } | |
76 | ||
77 | /* Query for input device type */ | |
78 | enum prom_input_device | |
79 | prom_query_input_device(void) | |
80 | { | |
81 | int st_p; | |
82 | char propb[64]; | |
83 | ||
84 | st_p = prom_inst2pkg(prom_stdin); | |
85 | if(prom_node_has_property(st_p, "keyboard")) | |
86 | return PROMDEV_IKBD; | |
87 | prom_getproperty(st_p, "device_type", propb, sizeof(propb)); | |
88 | if(strncmp(propb, "serial", 6)) | |
89 | return PROMDEV_I_UNK; | |
90 | /* FIXME: Is there any better way how to find out? */ | |
91 | memset(propb, 0, sizeof(propb)); | |
92 | st_p = prom_finddevice ("/options"); | |
93 | prom_getproperty(st_p, "input-device", propb, sizeof(propb)); | |
94 | ||
95 | /* | |
96 | * If we get here with propb == 'keyboard', we are on ttya, as | |
97 | * the PROM defaulted to this due to 'no input device'. | |
98 | */ | |
99 | if (!strncmp(propb, "keyboard", 8)) | |
100 | return PROMDEV_ITTYA; | |
101 | ||
102 | if (strncmp (propb, "tty", 3) || !propb[3]) | |
103 | return PROMDEV_I_UNK; | |
104 | switch (propb[3]) { | |
105 | case 'a': return PROMDEV_ITTYA; | |
106 | case 'b': return PROMDEV_ITTYB; | |
107 | default: return PROMDEV_I_UNK; | |
108 | } | |
109 | } | |
110 | ||
111 | /* Query for output device type */ | |
112 | ||
113 | enum prom_output_device | |
114 | prom_query_output_device(void) | |
115 | { | |
116 | int st_p; | |
117 | char propb[64]; | |
118 | int propl; | |
119 | ||
120 | st_p = prom_inst2pkg(prom_stdout); | |
121 | propl = prom_getproperty(st_p, "device_type", propb, sizeof(propb)); | |
122 | if (propl >= 0 && propl == sizeof("display") && | |
123 | strncmp("display", propb, sizeof("display")) == 0) | |
124 | return PROMDEV_OSCREEN; | |
125 | if(strncmp("serial", propb, 6)) | |
126 | return PROMDEV_O_UNK; | |
127 | /* FIXME: Is there any better way how to find out? */ | |
128 | memset(propb, 0, sizeof(propb)); | |
129 | st_p = prom_finddevice ("/options"); | |
130 | prom_getproperty(st_p, "output-device", propb, sizeof(propb)); | |
131 | ||
132 | /* | |
133 | * If we get here with propb == 'screen', we are on ttya, as | |
134 | * the PROM defaulted to this due to 'no input device'. | |
135 | */ | |
136 | if (!strncmp(propb, "screen", 6)) | |
137 | return PROMDEV_OTTYA; | |
138 | ||
139 | if (strncmp (propb, "tty", 3) || !propb[3]) | |
140 | return PROMDEV_O_UNK; | |
141 | switch (propb[3]) { | |
142 | case 'a': return PROMDEV_OTTYA; | |
143 | case 'b': return PROMDEV_OTTYB; | |
144 | default: return PROMDEV_O_UNK; | |
145 | } | |
146 | } |