diff options
Diffstat (limited to 'arch/sparc/prom/console.c')
| -rw-r--r-- | arch/sparc/prom/console.c | 220 |
1 files changed, 220 insertions, 0 deletions
diff --git a/arch/sparc/prom/console.c b/arch/sparc/prom/console.c new file mode 100644 index 000000000000..4e6e41d3291d --- /dev/null +++ b/arch/sparc/prom/console.c @@ -0,0 +1,220 @@ +/* $Id: console.c,v 1.25 2001/10/30 04:54:22 davem 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) 1998 Pete Zaitcev <zaitcev@yahoo.com> + */ + +#include <linux/types.h> +#include <linux/kernel.h> +#include <linux/sched.h> +#include <asm/openprom.h> +#include <asm/sun4prom.h> +#include <asm/oplib.h> +#include <asm/system.h> +#include <linux/string.h> + +extern void restore_current(void); + +static char con_name_jmc[] = "/obio/su@"; /* "/obio/su@0,3002f8"; */ +#define CON_SIZE_JMC (sizeof(con_name_jmc)) + +/* 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: + case PROM_SUN4: + 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: + case PROM_SUN4: + 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; +} + +/* Query for input device type */ +enum prom_input_device +prom_query_input_device(void) +{ + unsigned long flags; + int st_p; + char propb[64]; + char *p; + int propl; + + switch(prom_vers) { + case PROM_V0: + case PROM_V2: + case PROM_SUN4: + default: + switch(*romvec->pv_stdin) { + case PROMDEV_KBD: return PROMDEV_IKBD; + case PROMDEV_TTYA: return PROMDEV_ITTYA; + case PROMDEV_TTYB: return PROMDEV_ITTYB; + default: + return PROMDEV_I_UNK; + }; + case PROM_V3: + spin_lock_irqsave(&prom_lock, flags); + st_p = (*romvec->pv_v2devops.v2_inst2pkg)(*romvec->pv_v2bootargs.fd_stdin); + restore_current(); + spin_unlock_irqrestore(&prom_lock, flags); + if(prom_node_has_property(st_p, "keyboard")) + return PROMDEV_IKBD; + if (prom_getproperty(st_p, "name", propb, sizeof(propb)) != -1) { + if(strncmp(propb, "keyboard", sizeof("serial")) == 0) + return PROMDEV_IKBD; + } + if (prom_getproperty(st_p, "device_type", propb, sizeof(propb)) != -1) { + if(strncmp(propb, "serial", sizeof("serial"))) + return PROMDEV_I_UNK; + } + propl = prom_getproperty(prom_root_node, "stdin-path", propb, sizeof(propb)); + if(propl > 2) { + p = propb; + while(*p) p++; p -= 2; + if(p[0] == ':') { + if(p[1] == 'a') + return PROMDEV_ITTYA; + else if(p[1] == 'b') + return PROMDEV_ITTYB; + } + } + return PROMDEV_I_UNK; + } +} + +/* Query for output device type */ + +enum prom_output_device +prom_query_output_device(void) +{ + unsigned long flags; + int st_p; + char propb[64]; + char *p; + int propl; + + switch(prom_vers) { + case PROM_V0: + case PROM_SUN4: + switch(*romvec->pv_stdin) { + case PROMDEV_SCREEN: return PROMDEV_OSCREEN; + case PROMDEV_TTYA: return PROMDEV_OTTYA; + case PROMDEV_TTYB: return PROMDEV_OTTYB; + }; + break; + case PROM_V2: + case PROM_V3: + spin_lock_irqsave(&prom_lock, flags); + st_p = (*romvec->pv_v2devops.v2_inst2pkg)(*romvec->pv_v2bootargs.fd_stdout); + restore_current(); + spin_unlock_irqrestore(&prom_lock, flags); + propl = prom_getproperty(st_p, "device_type", propb, sizeof(propb)); + if (propl == sizeof("display") && + strncmp("display", propb, sizeof("display")) == 0) + { + return PROMDEV_OSCREEN; + } + if(prom_vers == PROM_V3) { + if(propl >= 0 && + strncmp("serial", propb, sizeof("serial")) != 0) + return PROMDEV_O_UNK; + propl = prom_getproperty(prom_root_node, "stdout-path", + propb, sizeof(propb)); + if(propl == CON_SIZE_JMC && + strncmp(propb, con_name_jmc, CON_SIZE_JMC) == 0) + return PROMDEV_OTTYA; + if(propl > 2) { + p = propb; + while(*p) p++; p-= 2; + if(p[0]==':') { + if(p[1] == 'a') + return PROMDEV_OTTYA; + else if(p[1] == 'b') + return PROMDEV_OTTYB; + } + } + } else { + switch(*romvec->pv_stdin) { + case PROMDEV_TTYA: return PROMDEV_OTTYA; + case PROMDEV_TTYB: return PROMDEV_OTTYB; + }; + } + break; + default: + ; + }; + return PROMDEV_O_UNK; +} |