From 07c8d27309c0b6a734a012f7b6913a8e815f49eb Mon Sep 17 00:00:00 2001 From: juhosg Date: Mon, 13 Feb 2012 15:17:59 +0000 Subject: ramips: add preliminary support for the RT3662/RT3883 SoCs git-svn-id: svn://svn.openwrt.org/openwrt/trunk@30495 3c298f89-4303-0410-b956-a3cf2f4a3e73 --- .../files/arch/mips/ralink/rt3883/early_printk.c | 29 ++++++++++++++++++++++ 1 file changed, 29 insertions(+) create mode 100644 target/linux/ramips/files/arch/mips/ralink/rt3883/early_printk.c (limited to 'target/linux/ramips/files/arch/mips/ralink/rt3883/early_printk.c') diff --git a/target/linux/ramips/files/arch/mips/ralink/rt3883/early_printk.c b/target/linux/ramips/files/arch/mips/ralink/rt3883/early_printk.c new file mode 100644 index 000000000..e3bf7ba33 --- /dev/null +++ b/target/linux/ramips/files/arch/mips/ralink/rt3883/early_printk.c @@ -0,0 +1,29 @@ +/* + * Ralink RT3662/RT3883 SoC early printk support + * + * Copyright (C) 2011-2012 Gabor Juhos + * + * 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 +#include + +#include + +#include + +#define UART_READ(r) \ + __raw_readl((void __iomem *)(KSEG1ADDR(RT3883_UART1_BASE) + 4 * (r))) + +#define UART_WRITE(r, v) \ + __raw_writel((v), (void __iomem *)(KSEG1ADDR(RT3883_UART1_BASE) + 4 * (r))) + +void prom_putchar(unsigned char ch) +{ + while (((UART_READ(RT3883_UART_REG_LSR)) & UART_LSR_THRE) == 0); + UART_WRITE(RT3883_UART_REG_TX, ch); + while (((UART_READ(RT3883_UART_REG_LSR)) & UART_LSR_THRE) == 0); +} -- cgit v1.2.3