mirror of
https://github.com/AuxXxilium/linux_dsm_epyc7002.git
synced 2024-12-24 17:37:09 +07:00
0be2abbcee
Remove old YAMON prom code and use common firmware library code. Signed-off-by: Steven J. Hill <Steven.Hill@imgtec.com>
47 lines
1.1 KiB
C
47 lines
1.1 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 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;
|
|
}
|