summaryrefslogtreecommitdiffstats
path: root/arch/mips/loongson/common/serial.c
blob: 7580873143c84df81f5e6d372de0db9d5ce23364 (plain)
1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
18
19
20
21
22
23
24
25
26
27
28
29
30
31
32
33
34
35
36
37
38
39
40
41
42
43
44
45
46
47
48
49
50
51
52
53
54
55
56
57
58
59
60
61
62
63
64
65
66
67
68
69
70
71
72
73
74
75
76
/*
 * 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) 2007 Ralf Baechle (ralf@linux-mips.org)
 *
 * Copyright (C) 2009 Lemote, Inc.
 * Author: Yan hua (yanhua@lemote.com)
 * Author: Wu Zhangjin (wuzhangjin@gmail.com)
 */

#include <linux/io.h>
#include <linux/init.h>
#include <linux/serial_8250.h>

#include <asm/bootinfo.h>

#include <loongson.h>
#include <machine.h>

#define PORT(int)			\
{								\
	.irq		= int,					\
	.uartclk	= 1843200,				\
	.iotype		= UPIO_PORT,				\
	.flags		= UPF_BOOT_AUTOCONF | UPF_SKIP_TEST,	\
	.regshift	= 0,					\
}

#define PORT_M(int)				\
{								\
	.irq		= MIPS_CPU_IRQ_BASE + (int),		\
	.uartclk	= 3686400,				\
	.iotype		= UPIO_MEM,				\
	.membase	= (void __iomem *)NULL,			\
	.flags		= UPF_BOOT_AUTOCONF | UPF_SKIP_TEST,	\
	.regshift	= 0,					\
}

static struct plat_serial8250_port uart8250_data[][2] = {
	[MACH_LOONGSON_UNKNOWN]         {},
	[MACH_LEMOTE_FL2E]              {PORT(4), {} },
	[MACH_LEMOTE_FL2F]              {PORT(3), {} },
	[MACH_LEMOTE_ML2F7]             {PORT_M(3), {} },
	[MACH_LEMOTE_YL2F89]            {PORT_M(3), {} },
	[MACH_DEXXON_GDIUM2F10]         {PORT_M(3), {} },
	[MACH_LEMOTE_NAS]               {PORT_M(3), {} },
	[MACH_LEMOTE_LL2F]              {PORT(3), {} },
	[MACH_LOONGSON_END]             {},
};

static struct platform_device uart8250_device = {
	.name = "serial8250",
	.id = PLAT8250_DEV_PLATFORM,
};

static int __init serial_init(void)
{
	unsigned char iotype;

	iotype = uart8250_data[mips_machtype][0].iotype;

	if (UPIO_MEM == iotype)
		uart8250_data[mips_machtype][0].membase =
			(void __iomem *)_loongson_uart_base;
	else if (UPIO_PORT == iotype)
		uart8250_data[mips_machtype][0].iobase =
		    loongson_uart_base - LOONGSON_PCIIO_BASE;

	uart8250_device.dev.platform_data = uart8250_data[mips_machtype];

	return platform_device_register(&uart8250_device);
}

device_initcall(serial_init);
OpenPOWER on IntegriCloud