diff options
author | Sam Ravnborg <sam@ravnborg.org> | 2008-11-30 06:15:38 (GMT) |
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committer | David S. Miller <davem@davemloft.net> | 2008-12-04 17:17:16 (GMT) |
commit | 708d4f09647106d549c646dc459c7ccf2c237cc8 (patch) | |
tree | 23657862535d88fcb71bc416c51c27cd480a93c4 /arch/sparc/prom/console_32.c | |
parent | 5e53879008b9acefe9f43498fd36db7376e08739 (diff) | |
download | linux-708d4f09647106d549c646dc459c7ccf2c237cc8.tar.xz |
sparc: prepare prom/ for unification
- rename files where sparc64 uses identical names to *_32.c
- refactor Makefile (but keep linking order)
Signed-off-by: Sam Ravnborg <sam@ravnborg.org>
Signed-off-by: David S. Miller <davem@davemloft.net>
Diffstat (limited to 'arch/sparc/prom/console_32.c')
-rw-r--r-- | arch/sparc/prom/console_32.c | 98 |
1 files changed, 98 insertions, 0 deletions
diff --git a/arch/sparc/prom/console_32.c b/arch/sparc/prom/console_32.c new file mode 100644 index 0000000..b3075d7 --- /dev/null +++ b/arch/sparc/prom/console_32.c @@ -0,0 +1,98 @@ +/* + * 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) 1998 Pete Zaitcev <zaitcev@yahoo.com> + */ + +#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 void restore_current(void); + +/* Non blocking get character from console input device, returns -1 + * if no input was taken. This can be used for polling. + */ +int +prom_nbgetchar(void) +{ + static char inc; + int i = -1; + unsigned long flags; + + spin_lock_irqsave(&prom_lock, flags); + switch(prom_vers) { + case PROM_V0: + i = (*(romvec->pv_nbgetchar))(); + break; + case PROM_V2: + case PROM_V3: + if( (*(romvec->pv_v2devops).v2_dev_read)(*romvec->pv_v2bootargs.fd_stdin , &inc, 0x1) == 1) { + i = inc; + } else { + i = -1; + } + break; + default: + i = -1; + break; + }; + restore_current(); + spin_unlock_irqrestore(&prom_lock, flags); + return i; /* Ugh, we could spin forever on unsupported proms ;( */ +} + +/* Non blocking put character to console device, returns -1 if + * unsuccessful. + */ +int +prom_nbputchar(char c) +{ + static char outc; + unsigned long flags; + int i = -1; + + spin_lock_irqsave(&prom_lock, flags); + switch(prom_vers) { + case PROM_V0: + i = (*(romvec->pv_nbputchar))(c); + break; + case PROM_V2: + case PROM_V3: + outc = c; + if( (*(romvec->pv_v2devops).v2_dev_write)(*romvec->pv_v2bootargs.fd_stdout, &outc, 0x1) == 1) + i = 0; + else + i = -1; + break; + default: + i = -1; + break; + }; + restore_current(); + spin_unlock_irqrestore(&prom_lock, flags); + return i; /* Ugh, we could spin forever on unsupported proms ;( */ +} + +/* 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) +{ + while(prom_nbputchar(c) == -1) ; + return; +} |