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