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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 | /* $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() { 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() { 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; } } |