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/mc146818rtc.h>
27 #include <linux/module.h>
28 #include <linux/mtd/partitions.h>
29 #include <linux/mtd/physmap.h>
30 #include <linux/platform_device.h>
31 #include <mtd/mtd-abi.h>
32 
33 #define SMC_PORT(base, int)						\
34 {									\
35 	.iobase		= base,						\
36 	.irq		= int,						\
37 	.uartclk	= 1843200,					\
38 	.iotype		= UPIO_PORT,					\
39 	.flags		= UPF_BOOT_AUTOCONF | UPF_SKIP_TEST,		\
40 	.regshift	= 0,						\
41 }
42 
43 #define CBUS_UART_FLAGS (UPF_BOOT_AUTOCONF | UPF_SKIP_TEST | UPF_IOREMAP)
44 
45 static struct plat_serial8250_port uart8250_data[] = {
46 	SMC_PORT(0x3F8, 4),
47 	SMC_PORT(0x2F8, 3),
48 	{
49 		.mapbase	= 0x1f000900,	/* The CBUS UART */
50 		.irq		= MIPS_CPU_IRQ_BASE + 2,
51 		.uartclk	= 3686400,	/* Twice the usual clk! */
52 		.iotype		= UPIO_MEM32,
53 		.flags		= CBUS_UART_FLAGS,
54 		.regshift	= 3,
55 	},
56 	{ },
57 };
58 
59 static struct platform_device malta_uart8250_device = {
60 	.name			= "serial8250",
61 	.id			= PLAT8250_DEV_PLATFORM,
62 	.dev			= {
63 		.platform_data	= uart8250_data,
64 	},
65 };
66 
67 struct resource malta_rtc_resources[] = {
68 	{
69 		.start	= RTC_PORT(0),
70 		.end	= RTC_PORT(7),
71 		.flags	= IORESOURCE_IO,
72 	}, {
73 		.start	= RTC_IRQ,
74 		.end	= RTC_IRQ,
75 		.flags	= IORESOURCE_IRQ,
76 	}
77 };
78 
79 static struct platform_device malta_rtc_device = {
80 	.name		= "rtc_cmos",
81 	.id		= -1,
82 	.resource	= malta_rtc_resources,
83 	.num_resources	= ARRAY_SIZE(malta_rtc_resources),
84 };
85 
86 static struct mtd_partition malta_mtd_partitions[] = {
87 	{
88 		.name =		"YAMON",
89 		.offset =	0x0,
90 		.size =		0x100000,
91 		.mask_flags =	MTD_WRITEABLE
92 	}, {
93 		.name =		"User FS",
94 		.offset = 	0x100000,
95 		.size =		0x2e0000
96 	}, {
97 		.name =		"Board Config",
98 		.offset =	0x3e0000,
99 		.size =		0x020000,
100 		.mask_flags =	MTD_WRITEABLE
101 	}
102 };
103 
104 static struct physmap_flash_data malta_flash_data = {
105 	.width		= 4,
106 	.nr_parts	= ARRAY_SIZE(malta_mtd_partitions),
107 	.parts		= malta_mtd_partitions
108 };
109 
110 static struct resource malta_flash_resource = {
111 	.start		= 0x1e000000,
112 	.end		= 0x1e3fffff,
113 	.flags		= IORESOURCE_MEM
114 };
115 
116 static struct platform_device malta_flash_device = {
117 	.name		= "physmap-flash",
118 	.id		= 0,
119 	.dev		= {
120 		.platform_data	= &malta_flash_data,
121 	},
122 	.num_resources	= 1,
123 	.resource	= &malta_flash_resource,
124 };
125 
126 static struct platform_device *malta_devices[] __initdata = {
127 	&malta_uart8250_device,
128 	&malta_rtc_device,
129 	&malta_flash_device,
130 };
131 
132 static int __init malta_add_devices(void)
133 {
134 	int err;
135 
136 	err = platform_add_devices(malta_devices, ARRAY_SIZE(malta_devices));
137 	if (err)
138 		return err;
139 
140 	/*
141 	 * Set RTC to BCD mode to support current alarm code.
142 	 */
143 	CMOS_WRITE(CMOS_READ(RTC_CONTROL) & ~RTC_DM_BINARY, RTC_CONTROL);
144 
145 	return 0;
146 }
147 
148 device_initcall(malta_add_devices);
149