patch-2.3.17 linux/arch/m68k/sun3/prom/console.c

• Lines: 176
• Date: Sat Sep 4 13:06:41 1999
• Orig file: v2.3.16/linux/arch/m68k/sun3/prom/console.c
• Orig date: Wed Dec 31 16:00:00 1969

diff -u --recursive --new-file v2.3.16/linux/arch/m68k/sun3/prom/console.c linux/arch/m68k/sun3/prom/console.c
@@ -0,0 +1,175 @@
+/* $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/config.h>
+#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;
+
+	save_flags(flags); cli();
+		i = (*(romvec->pv_nbgetchar))();
+	restore_flags(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;
+
+	save_flags(flags); cli();
+		i = (*(romvec->pv_nbputchar))(c);
+	restore_flags(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:
+		save_flags(flags); cli();
+		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");
+		restore_flags(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:
+		save_flags(flags); cli();
+		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");
+		restore_flags(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