Commit | Line | Data |
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3070033a SH |
1 | /* |
2 | * This file is subject to the terms and conditions of the GNU General Public | |
3 | * License. See the file "COPYING" in the main directory of this archive | |
4 | * for more details. | |
5 | * | |
6 | * Copyright (C) 2012 MIPS Technologies, Inc. All rights reserved. | |
7 | */ | |
8 | #include <linux/init.h> | |
9 | #include <linux/console.h> | |
10 | #include <linux/serial_reg.h> | |
11 | #include <linux/io.h> | |
12 | ||
13 | #define SEAD_UART1_REGS_BASE 0xbf000800 /* ttyS1 = DB9 port */ | |
14 | #define SEAD_UART0_REGS_BASE 0xbf000900 /* ttyS0 = USB port */ | |
15 | #define PORT(base_addr, offset) ((unsigned int __iomem *)(base_addr+(offset)*4)) | |
16 | ||
17 | static char console_port = 1; | |
18 | ||
19 | static inline unsigned int serial_in(int offset, unsigned int base_addr) | |
20 | { | |
21 | return __raw_readl(PORT(base_addr, offset)) & 0xff; | |
22 | } | |
23 | ||
24 | static inline void serial_out(int offset, int value, unsigned int base_addr) | |
25 | { | |
26 | __raw_writel(value, PORT(base_addr, offset)); | |
27 | } | |
28 | ||
29 | void __init prom_init_early_console(char port) | |
30 | { | |
31 | console_port = port; | |
32 | } | |
33 | ||
34 | int prom_putchar(char c) | |
35 | { | |
36 | unsigned int base_addr; | |
37 | ||
38 | base_addr = console_port ? SEAD_UART1_REGS_BASE : SEAD_UART0_REGS_BASE; | |
39 | ||
40 | while ((serial_in(UART_LSR, base_addr) & UART_LSR_THRE) == 0) | |
41 | ; | |
42 | ||
43 | serial_out(UART_TX, c, base_addr); | |
44 | ||
45 | return 1; | |
46 | } |