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Diffstat (limited to 'arch/m68k/sun3/prom/console.c')
-rw-r--r--arch/m68k/sun3/prom/console.c174
1 files changed, 174 insertions, 0 deletions
diff --git a/arch/m68k/sun3/prom/console.c b/arch/m68k/sun3/prom/console.c
new file mode 100644
index 00000000000..52c1427863d
--- /dev/null
+++ b/arch/m68k/sun3/prom/console.c
@@ -0,0 +1,174 @@
+/* $Id: console.c,v 1.10 1996/12/18 06:46:54 tridge 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)
+ */
+
+#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>
+
+/* 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)
+{
+ int i = -1;
+ unsigned long flags;
+
+ local_irq_save(flags);
+ i = (*(romvec->pv_nbgetchar))();
+ local_irq_restore(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)
+{
+ unsigned long flags;
+ int i = -1;
+
+ local_irq_save(flags);
+ i = (*(romvec->pv_nbputchar))(c);
+ local_irq_restore(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 */
+#if 0
+enum prom_input_device
+prom_query_input_device()
+{
+ unsigned long flags;
+ int st_p;
+ char propb[64];
+ char *p;
+
+ switch(prom_vers) {
+ case PROM_V0:
+ case PROM_V2:
+ 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:
+ case PROM_P1275:
+ local_irq_save(flags);
+ st_p = (*romvec->pv_v2devops.v2_inst2pkg)(*romvec->pv_v2bootargs.fd_stdin);
+ __asm__ __volatile__("ld [%0], %%g6\n\t" : :
+ "r" (&current_set[smp_processor_id()]) :
+ "memory");
+ local_irq_restore(flags);
+ if(prom_node_has_property(st_p, "keyboard"))
+ return PROMDEV_IKBD;
+ prom_getproperty(st_p, "device_type", propb, sizeof(propb));
+ if(strncmp(propb, "serial", sizeof("serial")))
+ return PROMDEV_I_UNK;
+ prom_getproperty(prom_root_node, "stdin-path", propb, sizeof(propb));
+ 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;
+ case PROM_AP1000:
+ return PROMDEV_I_UNK;
+ };
+}
+#endif
+
+/* Query for output device type */
+
+#if 0
+enum prom_output_device
+prom_query_output_device()
+{
+ unsigned long flags;
+ int st_p;
+ char propb[64];
+ char *p;
+ int propl;
+
+ switch(prom_vers) {
+ case PROM_V0:
+ 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:
+ case PROM_P1275:
+ local_irq_save(flags);
+ st_p = (*romvec->pv_v2devops.v2_inst2pkg)(*romvec->pv_v2bootargs.fd_stdout);
+ __asm__ __volatile__("ld [%0], %%g6\n\t" : :
+ "r" (&current_set[smp_processor_id()]) :
+ "memory");
+ local_irq_restore(flags);
+ 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(prom_vers == PROM_V3) {
+ if(strncmp("serial", propb, sizeof("serial")))
+ return PROMDEV_O_UNK;
+ prom_getproperty(prom_root_node, "stdout-path", propb, sizeof(propb));
+ 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;
+ }
+ return PROMDEV_O_UNK;
+ } else {
+ /* This works on SS-2 (an early OpenFirmware) still. */
+ switch(*romvec->pv_stdin) {
+ case PROMDEV_TTYA: return PROMDEV_OTTYA;
+ case PROMDEV_TTYB: return PROMDEV_OTTYB;
+ };
+ }
+ break;
+ case PROM_AP1000:
+ return PROMDEV_I_UNK;
+ };
+ return PROMDEV_O_UNK;
+}
+#endif