1 files changed, 87 insertions, 0 deletions
diff --git a/arch/mips/cobalt/promcon.c b/arch/mips/cobalt/promcon.c
new file mode 100644
index 000000000000..f03df761e9f1
--- /dev/null
+++ b/arch/mips/cobalt/promcon.c
@@ -0,0 +1,87 @@
+/*
+ * PROM console for Cobalt Raq2
+ *
+ * This file is subject to the terms and conditions of the GNU General Public
+ * License.  See the file "COPYING" in the main directory of this archive
+ * for more details.
+ *
+ * Copyright (C) 1995, 1996, 1997 by Ralf Baechle
+ * Copyright (C) 2001 by Liam Davies (ldavies@agile.tv)
+ *
+ */
+
+#include <linux/init.h>
+#include <linux/console.h>
+#include <linux/kdev_t.h>
+#include <linux/serial_reg.h>
+
+#include <asm/delay.h>
+#include <asm/serial.h>
+#include <asm/io.h>
+
+static unsigned long port = 0xc800000;
+
+static __inline__ void ns16550_cons_put_char(char ch, unsigned long ioaddr)
+{
+	char lsr;
+
+	do {
+		lsr = inb(ioaddr + UART_LSR);
+	} while ((lsr & (UART_LSR_TEMT | UART_LSR_THRE)) != (UART_LSR_TEMT | UART_LSR_THRE));
+	outb(ch, ioaddr + UART_TX);
+}
+
+static __inline__ char ns16550_cons_get_char(unsigned long ioaddr)
+{
+	while ((inb(ioaddr + UART_LSR) & UART_LSR_DR) == 0)
+		udelay(1);
+	return inb(ioaddr + UART_RX);
+}
+
+void ns16550_console_write(struct console *co, const char *s, unsigned count)
+{
+	char lsr, ier;
+	unsigned i;
+
+	ier = inb(port + UART_IER);
+	outb(0x00, port + UART_IER);
+	for (i=0; i < count; i++, s++) {
+
+		if(*s == '\n')
+			ns16550_cons_put_char('\r', port);
+		ns16550_cons_put_char(*s, port);
+	}
+
+	do {
+		lsr = inb(port + UART_LSR);
+   	} while ((lsr & (UART_LSR_TEMT | UART_LSR_THRE)) != (UART_LSR_TEMT | UART_LSR_THRE));
+
+	outb(ier, port + UART_IER);
+}
+
+char getDebugChar(void)
+{
+	return ns16550_cons_get_char(port);
+}
+
+void putDebugChar(char kgdb_char)
+{
+	ns16550_cons_put_char(kgdb_char, port);
+}
+
+static struct console ns16550_console = {
+    .name	= "prom",
+    .setup	= NULL,
+    .write	= ns16550_console_write,
+    .flags	= CON_PRINTBUFFER,
+    .index	= -1,
+};
+
+static int __init ns16550_setup_console(void)
+{
+	register_console(&ns16550_console);
+
+	return 0;
+}
+
+console_initcall(ns16550_setup_console);