[MIPS] Add early console for Cobalt.

    
Signed-off-by: Peter Horton <pdh@colonel-panic.org>
Signed-off-by: Ralf Baechle <ralf@linux-mips.org>

1 files changed, 43 insertions, 0 deletions

diff --git a/arch/mips/cobalt/console.c b/arch/mips/cobalt/console.c
new file mode 100644
index 000000000000..45c2d27c7564
--- /dev/null
+++ b/arch/mips/cobalt/console.c
@@ -0,0 +1,43 @@
+/*
+ * (C) P. Horton 2006
+ */
+
+#include <linux/config.h>
+#include <linux/init.h>
+#include <linux/kernel.h>
+#include <linux/console.h>
+#include <linux/serial_reg.h>
+#include <asm/addrspace.h>
+#include <asm/mach-cobalt/cobalt.h>
+
+static void putchar(int c)
+{
+        if(c == '\n')
+                putchar('\r');
+
+        while(!(COBALT_UART[UART_LSR] & UART_LSR_THRE))
+                ;
+
+        COBALT_UART[UART_TX] = c;
+}
+
+static void cons_write(struct console *c, const char *s, unsigned n)
+{
+        while(n-- && *s)
+                putchar(*s++);
+}
+
+static struct console cons_info =
+{
+        .name   = "uart",
+        .write  = cons_write,
+        .flags  = CON_PRINTBUFFER | CON_BOOT,
+        .index  = -1,
+};
+
+void __init cobalt_early_console(void)
+{
+        register_console(&cons_info);
+
+        printk("Cobalt: early console registered\n");
+}