xref: /OK3568_Linux_fs/kernel/arch/mips/loongson2ef/common/uart_base.c (revision 4882a59341e53eb6f0b4789bf948001014eff981) 
1*4882a593Smuzhiyun // SPDX-License-Identifier: GPL-2.0-or-later
2*4882a593Smuzhiyun /*
3*4882a593Smuzhiyun  * Copyright (C) 2009 Lemote Inc.
4*4882a593Smuzhiyun  * Author: Wu Zhangjin, wuzhangjin@gmail.com
5*4882a593Smuzhiyun  */
6*4882a593Smuzhiyun 
7*4882a593Smuzhiyun #include <linux/export.h>
8*4882a593Smuzhiyun #include <asm/bootinfo.h>
9*4882a593Smuzhiyun #include <asm/setup.h>
10*4882a593Smuzhiyun 
11*4882a593Smuzhiyun #include <loongson.h>
12*4882a593Smuzhiyun 
13*4882a593Smuzhiyun /* raw */
14*4882a593Smuzhiyun unsigned long loongson_uart_base;
15*4882a593Smuzhiyun /* ioremapped */
16*4882a593Smuzhiyun unsigned long _loongson_uart_base;
17*4882a593Smuzhiyun 
18*4882a593Smuzhiyun EXPORT_SYMBOL(loongson_uart_base);
19*4882a593Smuzhiyun EXPORT_SYMBOL(_loongson_uart_base);
20*4882a593Smuzhiyun 
prom_init_loongson_uart_base(void)21*4882a593Smuzhiyun void prom_init_loongson_uart_base(void)
22*4882a593Smuzhiyun {
23*4882a593Smuzhiyun 	switch (mips_machtype) {
24*4882a593Smuzhiyun 	case MACH_LEMOTE_FL2E:
25*4882a593Smuzhiyun 		loongson_uart_base = LOONGSON_PCIIO_BASE + 0x3f8;
26*4882a593Smuzhiyun 		break;
27*4882a593Smuzhiyun 	case MACH_LEMOTE_FL2F:
28*4882a593Smuzhiyun 	case MACH_LEMOTE_LL2F:
29*4882a593Smuzhiyun 		loongson_uart_base = LOONGSON_PCIIO_BASE + 0x2f8;
30*4882a593Smuzhiyun 		break;
31*4882a593Smuzhiyun 	case MACH_LEMOTE_ML2F7:
32*4882a593Smuzhiyun 	case MACH_LEMOTE_YL2F89:
33*4882a593Smuzhiyun 	case MACH_DEXXON_GDIUM2F10:
34*4882a593Smuzhiyun 	case MACH_LEMOTE_NAS:
35*4882a593Smuzhiyun 	default:
36*4882a593Smuzhiyun 		/* The CPU provided serial port (LPC) */
37*4882a593Smuzhiyun 		loongson_uart_base = LOONGSON_LIO1_BASE + 0x3f8;
38*4882a593Smuzhiyun 		break;
39*4882a593Smuzhiyun 	}
40*4882a593Smuzhiyun 
41*4882a593Smuzhiyun 	_loongson_uart_base = TO_UNCAC(loongson_uart_base);
42*4882a593Smuzhiyun 	setup_8250_early_printk_port(_loongson_uart_base, 0, 1024);
43*4882a593Smuzhiyun }
44