diff options
Diffstat (limited to 'arch/sparc64/prom/console.c')
| -rw-r--r-- | arch/sparc64/prom/console.c | 146 |
1 files changed, 146 insertions, 0 deletions
diff --git a/arch/sparc64/prom/console.c b/arch/sparc64/prom/console.c new file mode 100644 index 00000000000..028a53fcb1e --- /dev/null +++ b/arch/sparc64/prom/console.c @@ -0,0 +1,146 @@ +/* $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(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; + } +} |