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/irq.h>
29 #include <linux/mtd/partitions.h>
30 #include <linux/mtd/physmap.h>
31 #include <linux/platform_device.h>
32 #include <asm/mips-boards/maltaint.h>
33 #include <mtd/mtd-abi.h>
34 
35 #define SMC_PORT(base, int)						\
36 {									\
37 	.iobase		= base,						\
38 	.irq		= int,						\
39 	.uartclk	= 1843200,					\
40 	.iotype		= UPIO_PORT,					\
41 	.flags		= UPF_BOOT_AUTOCONF | UPF_SKIP_TEST,		\
42 	.regshift	= 0,						\
43 }
44 
45 #define CBUS_UART_FLAGS (UPF_BOOT_AUTOCONF | UPF_SKIP_TEST | UPF_IOREMAP)
46 
47 static struct plat_serial8250_port uart8250_data[] = {
48 	SMC_PORT(0x3F8, 4),
49 	SMC_PORT(0x2F8, 3),
50 	{
51 		.mapbase	= 0x1f000900,	/* The CBUS UART */
52 		.irq		= MIPS_CPU_IRQ_BASE + MIPSCPU_INT_MB2,
53 		.uartclk	= 3686400,	/* Twice the usual clk! */
54 		.iotype		= UPIO_MEM32,
55 		.flags		= CBUS_UART_FLAGS,
56 		.regshift	= 3,
57 	},
58 	{ },
59 };
60 
61 static struct platform_device malta_uart8250_device = {
62 	.name			= "serial8250",
63 	.id			= PLAT8250_DEV_PLATFORM,
64 	.dev			= {
65 		.platform_data	= uart8250_data,
66 	},
67 };
68 
69 struct resource malta_rtc_resources[] = {
70 	{
71 		.start	= RTC_PORT(0),
72 		.end	= RTC_PORT(7),
73 		.flags	= IORESOURCE_IO,
74 	}, {
75 		.start	= RTC_IRQ,
76 		.end	= RTC_IRQ,
77 		.flags	= IORESOURCE_IRQ,
78 	}
79 };
80 
81 static struct platform_device malta_rtc_device = {
82 	.name		= "rtc_cmos",
83 	.id		= -1,
84 	.resource	= malta_rtc_resources,
85 	.num_resources	= ARRAY_SIZE(malta_rtc_resources),
86 };
87 
88 static struct mtd_partition malta_mtd_partitions[] = {
89 	{
90 		.name =		"YAMON",
91 		.offset =	0x0,
92 		.size =		0x100000,
93 		.mask_flags =	MTD_WRITEABLE
94 	}, {
95 		.name =		"User FS",
96 		.offset =	0x100000,
97 		.size =		0x2e0000
98 	}, {
99 		.name =		"Board Config",
100 		.offset =	0x3e0000,
101 		.size =		0x020000,
102 		.mask_flags =	MTD_WRITEABLE
103 	}
104 };
105 
106 static struct physmap_flash_data malta_flash_data = {
107 	.width		= 4,
108 	.nr_parts	= ARRAY_SIZE(malta_mtd_partitions),
109 	.parts		= malta_mtd_partitions
110 };
111 
112 static struct resource malta_flash_resource = {
113 	.start		= 0x1e000000,
114 	.end		= 0x1e3fffff,
115 	.flags		= IORESOURCE_MEM
116 };
117 
118 static struct platform_device malta_flash_device = {
119 	.name		= "physmap-flash",
120 	.id		= 0,
121 	.dev		= {
122 		.platform_data	= &malta_flash_data,
123 	},
124 	.num_resources	= 1,
125 	.resource	= &malta_flash_resource,
126 };
127 
128 static struct platform_device *malta_devices[] __initdata = {
129 	&malta_uart8250_device,
130 	&malta_rtc_device,
131 	&malta_flash_device,
132 };
133 
134 static int __init malta_add_devices(void)
135 {
136 	int err;
137 
138 	err = platform_add_devices(malta_devices, ARRAY_SIZE(malta_devices));
139 	if (err)
140 		return err;
141 
142 	return 0;
143 }
144 
145 device_initcall(malta_add_devices);
146