1/*
2 * Favr-32 board-specific flash initialization
3 *
4 * Copyright (C) 2008 Atmel Corporation
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		= 40,
21	.ncs_write_setup	= 0,
22	.nwe_setup		= 10,
23
24	.ncs_read_pulse		= 80,
25	.nrd_pulse		= 40,
26	.ncs_write_pulse	= 65,
27	.nwe_pulse		= 55,
28
29	.read_cycle		= 120,
30	.write_cycle		= 120,
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
40static struct mtd_partition flash_parts[] = {
41	{
42		.name           = "u-boot",
43		.offset         = 0x00000000,
44		.size           = 0x00020000,           /* 128 KiB */
45		.mask_flags     = MTD_WRITEABLE,
46	},
47	{
48		.name           = "root",
49		.offset         = 0x00020000,
50		.size           = 0x007d0000,
51	},
52	{
53		.name           = "env",
54		.offset         = 0x007f0000,
55		.size           = 0x00010000,
56		.mask_flags     = MTD_WRITEABLE,
57	},
58};
59
60static struct physmap_flash_data flash_data = {
61	.width		= 2,
62	.nr_parts	= ARRAY_SIZE(flash_parts),
63	.parts		= flash_parts,
64};
65
66static struct resource flash_resource = {
67	.start		= 0x00000000,
68	.end		= 0x007fffff,
69	.flags		= IORESOURCE_MEM,
70};
71
72static struct platform_device flash_device = {
73	.name		= "physmap-flash",
74	.id		= 0,
75	.resource	= &flash_resource,
76	.num_resources	= 1,
77	.dev		= {
78		.platform_data = &flash_data,
79	},
80};
81
82/* This needs to be called after the SMC has been initialized */
83static int __init favr32_flash_init(void)
84{
85	int ret;
86
87	smc_set_timing(&flash_config, &flash_timing);
88	ret = smc_set_configuration(0, &flash_config);
89	if (ret < 0) {
90		printk(KERN_ERR "Favr-32: failed to set NOR flash timing\n");
91		return ret;
92	}
93
94	platform_device_register(&flash_device);
95
96	return 0;
97}
98device_initcall(favr32_flash_init);
99