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) 2006, 07 MIPS Technologies, Inc.
7 *   written by Ralf Baechle (ralf@linux-mips.org)
8 *     written by Ralf Baechle <ralf@linux-mips.org>
9 *
10 * Copyright (C) 2008 Wind River Systems, Inc.
11 *   updated by Tiejun Chen <tiejun.chen@windriver.com>
12 *
13 * 1. Probe driver for the Malta's UART ports:
14 *
15 *   o 2 ports in the SMC SuperIO
16 *   o 1 port in the CBUS UART, a discrete 16550 which normally is only used
17 *     for bringups.
18 *
19 * We don't use 8250_platform.c on Malta as it would result in the CBUS
20 * UART becoming ttyS0.
21 *
22 * 2. Register RTC-CMOS platform device on Malta.
23 */
24#include <linux/init.h>
25#include <linux/serial_8250.h>
26#include <linux/irq.h>
27#include <linux/platform_device.h>
28#include <asm/mips-boards/maltaint.h>
29
30#define SMC_PORT(base, int)						\
31{									\
32	.iobase		= base,						\
33	.irq		= int,						\
34	.uartclk	= 1843200,					\
35	.iotype		= UPIO_PORT,					\
36	.flags		= UPF_BOOT_AUTOCONF | UPF_SKIP_TEST |		\
37			  UPF_MAGIC_MULTIPLIER,				\
38	.regshift	= 0,						\
39}
40
41#define CBUS_UART_FLAGS (UPF_BOOT_AUTOCONF | UPF_SKIP_TEST | UPF_IOREMAP)
42
43static struct plat_serial8250_port uart8250_data[] = {
44	SMC_PORT(0x3F8, 4),
45	SMC_PORT(0x2F8, 3),
46	{
47		.mapbase	= 0x1f000900,	/* The CBUS UART */
48		.irq		= MIPS_CPU_IRQ_BASE + MIPSCPU_INT_MB2,
49		.uartclk	= 3686400,	/* Twice the usual clk! */
50		.iotype		= IS_ENABLED(CONFIG_CPU_BIG_ENDIAN) ?
51				  UPIO_MEM32BE : UPIO_MEM32,
52		.flags		= CBUS_UART_FLAGS,
53		.regshift	= 3,
54	},
55	{ },
56};
57
58static struct platform_device malta_uart8250_device = {
59	.name			= "serial8250",
60	.id			= PLAT8250_DEV_PLATFORM,
61	.dev			= {
62		.platform_data	= uart8250_data,
63	},
64};
65
66static struct platform_device *malta_devices[] __initdata = {
67	&malta_uart8250_device,
68};
69
70static int __init malta_add_devices(void)
71{
72	return platform_add_devices(malta_devices, ARRAY_SIZE(malta_devices));
73}
74
75device_initcall(malta_add_devices);
76