forked from luck/tmp_suning_uos_patched
3070033a16
More information about the SEAD-3 platform can be found at <http://www.mips.com/products/development-kits/mips-sead-3/> on MTI's site. Currently, the M14K family of cores is what the SEAD-3 is utilised with. Signed-off-by: Douglas Leung <douglas@mips.com> Signed-off-by: Chris Dearman <chris@mips.com> Signed-off-by: Steven J. Hill <sjhill@mips.com>
47 lines
1.2 KiB
C
47 lines
1.2 KiB
C
/*
|
|
* 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 <linux/init.h>
|
|
#include <linux/console.h>
|
|
#include <linux/serial_reg.h>
|
|
#include <linux/io.h>
|
|
|
|
#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 prom_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;
|
|
}
|