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 #ifndef CONFIG_MIPS_CMP
51 	{
52 		.mapbase	= 0x1f000900,	/* The CBUS UART */
53 		.irq		= MIPS_CPU_IRQ_BASE + MIPSCPU_INT_MB2,
54 		.uartclk	= 3686400,	/* Twice the usual clk! */
55 		.iotype		= UPIO_MEM32,
56 		.flags		= CBUS_UART_FLAGS,
57 		.regshift	= 3,
58 	},
59 #endif
60 	{ },
61 };
62 
63 static struct platform_device malta_uart8250_device = {
64 	.name			= "serial8250",
65 	.id			= PLAT8250_DEV_PLATFORM,
66 	.dev			= {
67 		.platform_data	= uart8250_data,
68 	},
69 };
70 
71 struct resource malta_rtc_resources[] = {
72 	{
73 		.start	= RTC_PORT(0),
74 		.end	= RTC_PORT(7),
75 		.flags	= IORESOURCE_IO,
76 	}, {
77 		.start	= RTC_IRQ,
78 		.end	= RTC_IRQ,
79 		.flags	= IORESOURCE_IRQ,
80 	}
81 };
82 
83 static struct platform_device malta_rtc_device = {
84 	.name		= "rtc_cmos",
85 	.id		= -1,
86 	.resource	= malta_rtc_resources,
87 	.num_resources	= ARRAY_SIZE(malta_rtc_resources),
88 };
89 
90 static struct mtd_partition malta_mtd_partitions[] = {
91 	{
92 		.name =		"YAMON",
93 		.offset =	0x0,
94 		.size =		0x100000,
95 		.mask_flags =	MTD_WRITEABLE
96 	}, {
97 		.name =		"User FS",
98 		.offset =	0x100000,
99 		.size =		0x2e0000
100 	}, {
101 		.name =		"Board Config",
102 		.offset =	0x3e0000,
103 		.size =		0x020000,
104 		.mask_flags =	MTD_WRITEABLE
105 	}
106 };
107 
108 static struct physmap_flash_data malta_flash_data = {
109 	.width		= 4,
110 	.nr_parts	= ARRAY_SIZE(malta_mtd_partitions),
111 	.parts		= malta_mtd_partitions
112 };
113 
114 static struct resource malta_flash_resource = {
115 	.start		= 0x1e000000,
116 	.end		= 0x1e3fffff,
117 	.flags		= IORESOURCE_MEM
118 };
119 
120 static struct platform_device malta_flash_device = {
121 	.name		= "physmap-flash",
122 	.id		= 0,
123 	.dev		= {
124 		.platform_data	= &malta_flash_data,
125 	},
126 	.num_resources	= 1,
127 	.resource	= &malta_flash_resource,
128 };
129 
130 static struct platform_device *malta_devices[] __initdata = {
131 	&malta_uart8250_device,
132 	&malta_rtc_device,
133 	&malta_flash_device,
134 };
135 
136 static int __init malta_add_devices(void)
137 {
138 	int err;
139 
140 	err = platform_add_devices(malta_devices, ARRAY_SIZE(malta_devices));
141 	if (err)
142 		return err;
143 
144 	return 0;
145 }
146 
147 device_initcall(malta_add_devices);
148