adm5120: add experimental 3.14 kernel support

[openwrt/svn-archive/archive.git] / target / linux / adm5120 / files-3.14 / arch / mips / adm5120 / common / early-printk.c

diff --git a/target/linux/adm5120/files-3.14/arch/mips/adm5120/common/early-printk.c b/target/linux/adm5120/files-3.14/arch/mips/adm5120/common/early-printk.c
new file mode 100644 (file)
index 0000000..d900712
--- /dev/null
+++ b/target/linux/adm5120/files-3.14/arch/mips/adm5120/common/early-printk.c
@@ -0,0 +1,31 @@
+/*
+ *  ADM5120 specific early printk support
+ *
+ *  Copyright (C) 2007-2008 Gabor Juhos <juhosg@openwrt.org>
+ *
+ *  This program is free software; you can redistribute it and/or modify it
+ *  under the terms of the GNU General Public License version 2 as published
+ *  by the Free Software Foundation.
+ *
+ */
+
+#include <linux/init.h>
+#include <linux/io.h>
+
+#include <asm/addrspace.h>
+#include <asm/mach-adm5120/adm5120_defs.h>
+#include <asm/mach-adm5120/adm5120_uart.h>
+
+#define UART_READ(r) \
+       __raw_readl((void __iomem *)(KSEG1ADDR(ADM5120_UART0_BASE)+(r)))
+#define UART_WRITE(r, v) \
+       __raw_writel((v), (void __iomem *)(KSEG1ADDR(ADM5120_UART0_BASE)+(r)))
+
+void __init prom_putchar(char ch)
+{
+       while ((UART_READ(UART_REG_FLAG) & UART_FLAG_TXFE) == 0)
+               ;
+       UART_WRITE(UART_REG_DATA, ch);
+       while ((UART_READ(UART_REG_FLAG) & UART_FLAG_TXFE) == 0)
+               ;
+}