1/*
2 * MIMC200 board-specific flash initialization
3 *
4 * Copyright (C) 2008 Mercury IMC Ltd
5 *
6 * This program is free software; you can redistribute it and/or modify
7 * it under the terms of the GNU General Public License version 2 as
8 * published by the Free Software Foundation.
9 */
10#include <linux/init.h>
11#include <linux/platform_device.h>
12#include <linux/mtd/mtd.h>
13#include <linux/mtd/partitions.h>
14#include <linux/mtd/physmap.h>
15
16#include <mach/smc.h>
17
18static struct smc_timing flash_timing __initdata = {
19	.ncs_read_setup		= 0,
20	.nrd_setup		= 15,
21	.ncs_write_setup	= 0,
22	.nwe_setup		= 0,
23
24	.ncs_read_pulse		= 115,
25	.nrd_pulse		= 110,
26	.ncs_write_pulse	= 60,
27	.nwe_pulse		= 60,
28
29	.read_cycle		= 115,
30	.write_cycle		= 100,
31};
32
33static struct smc_config flash_config __initdata = {
34	.bus_width		= 2,
35	.nrd_controlled		= 1,
36	.nwe_controlled		= 1,
37	.byte_write		= 1,
38};
39
40/* system flash definition */
41
42static struct mtd_partition flash_parts_system[] = {
43	{
44		.name           = "u-boot",
45		.offset         = 0x00000000,
46		.size           = 0x00020000,           /* 128 KiB */
47		.mask_flags     = MTD_WRITEABLE,
48	},
49	{
50		.name           = "root",
51		.offset         = 0x00020000,
52		.size           = 0x007c0000,
53	},
54	{
55		.name		= "splash",
56		.offset		= 0x007e0000,
57		.size		= 0x00010000,		/* 64KiB */
58	},
59	{
60		.name           = "env",
61		.offset         = 0x007f0000,
62		.size           = 0x00010000,
63		.mask_flags     = MTD_WRITEABLE,
64	},
65};
66
67static struct physmap_flash_data flash_system = {
68	.width		= 2,
69	.nr_parts	= ARRAY_SIZE(flash_parts_system),
70	.parts		= flash_parts_system,
71};
72
73static struct resource flash_resource_system = {
74	.start		= 0x00000000,
75	.end		= 0x007fffff,
76	.flags		= IORESOURCE_MEM,
77};
78
79static struct platform_device flash_device_system = {
80	.name		= "physmap-flash",
81	.id		= 0,
82	.resource	= &flash_resource_system,
83	.num_resources	= 1,
84	.dev		= {
85		.platform_data = &flash_system,
86	},
87};
88
89/* data flash definition */
90
91static struct mtd_partition flash_parts_data[] = {
92	{
93		.name		= "data",
94		.offset		= 0x00000000,
95		.size		= 0x00800000,
96	},
97};
98
99static struct physmap_flash_data flash_data = {
100	.width		= 2,
101	.nr_parts	= ARRAY_SIZE(flash_parts_data),
102	.parts		= flash_parts_data,
103};
104
105static struct resource flash_resource_data = {
106	.start		= 0x08000000,
107	.end		= 0x087fffff,
108	.flags		= IORESOURCE_MEM,
109};
110
111static struct platform_device flash_device_data = {
112	.name		= "physmap-flash",
113	.id		= 1,
114	.resource	= &flash_resource_data,
115	.num_resources	= 1,
116	.dev		= {
117		.platform_data = &flash_data,
118	},
119};
120
121/* This needs to be called after the SMC has been initialized */
122static int __init mimc200_flash_init(void)
123{
124	int ret;
125
126	smc_set_timing(&flash_config, &flash_timing);
127	ret = smc_set_configuration(0, &flash_config);
128	if (ret < 0) {
129		printk(KERN_ERR "mimc200: failed to set 'System' NOR flash timing\n");
130		return ret;
131	}
132	ret = smc_set_configuration(1, &flash_config);
133	if (ret < 0) {
134		printk(KERN_ERR "mimc200: failed to set 'Data' NOR flash timing\n");
135		return ret;
136	}
137
138	platform_device_register(&flash_device_system);
139	platform_device_register(&flash_device_data);
140
141	return 0;
142}
143device_initcall(mimc200_flash_init);
144