[POWERPC] Add uartlite boot console driver for the zImage wrapper

Signed-off-by: Grant Likely <grant.likely@secretlab.ca>
Acked-by: Peter Korsgaard <jacmet@sunsite.dk>
Signed-off-by: Paul Mackerras <paulus@samba.org>

2 files changed, 38 insertions, 0 deletions

diff --git a/arch/ppc/boot/simple/Makefile b/arch/ppc/boot/simple/Makefile
index bcfb6cde70c4..5b877792d14f 100644
--- a/arch/ppc/boot/simple/Makefile
+++ b/arch/ppc/boot/simple/Makefile
@@ -201,6 +201,7 @@ boot-$(CONFIG_8260)		+= m8260_tty.o
 endif
 boot-$(CONFIG_SERIAL_MPC52xx_CONSOLE)   += mpc52xx_tty.o
 boot-$(CONFIG_SERIAL_MPSC_CONSOLE)      += mv64x60_tty.o
+boot-$(CONFIG_SERIAL_UARTLITE_CONSOLE)  += uartlite_tty.o
 
 LIBS                            := $(common)/lib.a $(bootlib)/lib.a
 ifeq ($(CONFIG_PPC_PREP),y)
diff --git a/arch/ppc/boot/simple/uartlite_tty.c b/arch/ppc/boot/simple/uartlite_tty.c
new file mode 100644
index 000000000000..0eae1eab38d4
--- /dev/null
+++ b/arch/ppc/boot/simple/uartlite_tty.c
@@ -0,0 +1,37 @@
+/*
+ * Xilinx UARTLITE bootloader driver
+ *
+ * Copyright (c) 2007 Secret Lab Technologies Ltd.
+ *
+ * This program is free software; you can redistribute  it and/or modify it
+ * under  the terms of  the GNU General  Public License as published by the
+ * Free Software Foundation;  either version 2 of the  License, or (at your
+ * option) any later version.
+ */
+
+#include <linux/types.h>
+#include <asm/serial.h>
+#include <asm/io.h>
+#include <platforms/4xx/xparameters/xparameters.h>
+
+#define UARTLITE_BASEADDR ((void*)(XPAR_UARTLITE_0_BASEADDR))
+
+void
+serial_putc(unsigned long com_port, unsigned char c)
+{
+        while ((in_be32(UARTLITE_BASEADDR + 0x8) & 0x08) != 0); /* spin */
+        out_be32(UARTLITE_BASEADDR + 0x4, c);
+}
+
+unsigned char
+serial_getc(unsigned long com_port)
+{
+        while ((in_be32(UARTLITE_BASEADDR + 0x8) & 0x01) == 0); /* spin */
+        return in_be32(UARTLITE_BASEADDR);
+}
+
+int
+serial_tstc(unsigned long com_port)
+{
+        return ((in_be32(UARTLITE_BASEADDR + 0x8) & 0x01) != 0);
+}