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 */
14 unsigned long loongson_uart_base;
15 /* ioremapped */
16 unsigned long _loongson_uart_base;
17
18 EXPORT_SYMBOL(loongson_uart_base);
19 EXPORT_SYMBOL(_loongson_uart_base);
20
21 void 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
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