1/*
2 * Merisc board-specific flash initialization
3 *
4 * Copyright (C) 2008 Martinsson Elektronik AB
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#include <mach/smc.h>
16
17/* Will be translated to units of 14.3 ns, rounded up */
18static struct smc_timing flash_timing __initdata = {
19	.ncs_read_setup		= 1 * 14,
20	.nrd_setup		= 5 * 14,
21	.ncs_write_setup	= 1 * 14,
22	.nwe_setup		= 2 * 14,
23
24	.ncs_read_pulse		= 12 * 14,
25	.nrd_pulse		= 7 * 14,
26	.ncs_write_pulse	= 8 * 14,
27	.nwe_pulse		= 4 * 14,
28
29	.read_cycle		= 14 * 14,
30	.write_cycle		= 10 * 14,
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	.tdf_cycles	= 3,
39};
40
41static struct mtd_partition flash_0_parts[] = {
42	{
43		.name		= "boot",
44		.offset		= 0x00000000,
45		.size		= 0x00060000,
46		.mask_flags	= 0,
47	},
48	{
49		.name		= "kernel",
50		.offset		= 0x00060000,
51		.size		= 0x00200000,
52		.mask_flags	= 0,
53	},
54	{
55		.name		= "root",
56		.offset		= 0x00260000,
57		.size		= MTDPART_SIZ_FULL,
58		.mask_flags	= 0,
59	},
60};
61
62static struct mtd_partition flash_1_parts[] = {
63	{
64		.name		= "2ndflash",
65		.offset		= 0x00000000,
66		.size		= MTDPART_SIZ_FULL,
67		.mask_flags	= 0,
68	},
69};
70
71static struct physmap_flash_data flash_data[] = {
72	{
73		.width		= 2,
74		.nr_parts	= ARRAY_SIZE(flash_0_parts),
75		.parts		= flash_0_parts,
76	},
77	{
78		.width		= 2,
79		.nr_parts	= ARRAY_SIZE(flash_1_parts),
80		.parts		= flash_1_parts,
81	}
82};
83
84static struct resource flash_resource[] = {
85	{
86		.start		= 0x00000000,
87		.end		= 0x03ffffff,
88		.flags		= IORESOURCE_MEM,
89	},
90	{
91		.start		= 0x04000000,
92		.end		= 0x07ffffff,
93		.flags		= IORESOURCE_MEM,
94	},
95};
96
97static struct platform_device flash_device[] = {
98	{
99		.name		= "physmap-flash",
100		.id		= 0,
101		.resource	= &flash_resource[0],
102		.num_resources	= 1,
103		.dev		= {
104			.platform_data	= &flash_data[0],
105		},
106	},
107	{
108		.name		= "physmap-flash",
109		.id		= 1,
110		.resource	= &flash_resource[1],
111		.num_resources	= 1,
112		.dev		= {
113			.platform_data	= &flash_data[1],
114		},
115	},
116};
117
118static int __init merisc_flash_init(void)
119{
120	int ret;
121	smc_set_timing(&flash_config, &flash_timing);
122
123	ret = smc_set_configuration(0, &flash_config);
124	if (ret < 0) {
125		printk(KERN_ERR "Merisc: failed to set NOR flash timing #0\n");
126		return ret;
127	}
128
129	ret = smc_set_configuration(4, &flash_config);
130	if (ret < 0) {
131		printk(KERN_ERR "Merisc: failed to set NOR flash timing #1\n");
132		return ret;
133	}
134
135	platform_device_register(&flash_device[0]);
136	platform_device_register(&flash_device[1]);
137	return 0;
138}
139device_initcall(merisc_flash_init);
140