From 57f0f512b273f60d52568b8c6b77e17f5636edc0 Mon Sep 17 00:00:00 2001 From: André Fabian Silva Delgado Date: Wed, 5 Aug 2015 17:04:01 -0300 Subject: Initial import --- arch/mips/mti-sead3/sead3-console.c | 46 +++++++++++++++++++++++++++++++++++++ 1 file changed, 46 insertions(+) create mode 100644 arch/mips/mti-sead3/sead3-console.c (limited to 'arch/mips/mti-sead3/sead3-console.c') diff --git a/arch/mips/mti-sead3/sead3-console.c b/arch/mips/mti-sead3/sead3-console.c new file mode 100644 index 000000000..031f47d69 --- /dev/null +++ b/arch/mips/mti-sead3/sead3-console.c @@ -0,0 +1,46 @@ +/* + * 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) 2012 MIPS Technologies, Inc. All rights reserved. + */ +#include +#include +#include +#include + +#define SEAD_UART1_REGS_BASE 0xbf000800 /* ttyS1 = DB9 port */ +#define SEAD_UART0_REGS_BASE 0xbf000900 /* ttyS0 = USB port */ +#define PORT(base_addr, offset) ((unsigned int __iomem *)(base_addr+(offset)*4)) + +static char console_port = 1; + +static inline unsigned int serial_in(int offset, unsigned int base_addr) +{ + return __raw_readl(PORT(base_addr, offset)) & 0xff; +} + +static inline void serial_out(int offset, int value, unsigned int base_addr) +{ + __raw_writel(value, PORT(base_addr, offset)); +} + +void __init fw_init_early_console(char port) +{ + console_port = port; +} + +int prom_putchar(char c) +{ + unsigned int base_addr; + + base_addr = console_port ? SEAD_UART1_REGS_BASE : SEAD_UART0_REGS_BASE; + + while ((serial_in(UART_LSR, base_addr) & UART_LSR_THRE) == 0) + ; + + serial_out(UART_TX, c, base_addr); + + return 1; +} -- cgit v1.2.3-54-g00ecf