aboutsummaryrefslogtreecommitdiffstats
path: root/drivers/mtd/maps/ocotea.c
blob: 6e559bc146363e2abedbb17e83fd9a1017197118 (plain)
1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
18
19
20
21
22
23
24
25
26
27
28
29
30
31
32
33
34
35
36
37
38
39
40
41
42
43
44
45
46
47
48
49
50
51
52
53
54
55
56
57
58
59
60
61
62
63
64
65
66
67
68
69
70
71
72
73
74
75
76
77
78
79
80
81
82
83
84
85
86
87
88
89
90
91
92
93
94
95
96
97
98
99
100
101
102
103
104
105
106
107
108
109
110
111
112
113
114
115
116
117
118
119
120
121
122
123
124
125
126
127
128
129
130
131
132
133
134
135
136
137
138
139
140
141
142
143
144
145
146
147
148
149
150
151
152
153
154
/*
 * Mapping for Ocotea user flash
 *
 * Matt Porter <mporter@kernel.crashing.org>
 *
 * Copyright 2002-2004 MontaVista Software Inc.
 *
 * This program is free software; you can redistribute  it and/or modify it
 * under  the terms of  the GNU General  Public License as published by the
 * Free Software Foundation;  either version 2 of the  License, or (at your
 * option) any later version.
 */

#include <linux/module.h>
#include <linux/types.h>
#include <linux/kernel.h>
#include <linux/init.h>
#include <linux/mtd/mtd.h>
#include <linux/mtd/map.h>
#include <linux/mtd/partitions.h>
#include <linux/config.h>
#include <linux/version.h>
#include <asm/io.h>
#include <asm/ibm44x.h>
#include <platforms/4xx/ocotea.h>

static struct mtd_info *flash;

static struct map_info ocotea_small_map = {
	.name =		"Ocotea small flash",
	.size =		OCOTEA_SMALL_FLASH_SIZE,
	.buswidth =	1,
};

static struct map_info ocotea_large_map = {
	.name =		"Ocotea large flash",
	.size =		OCOTEA_LARGE_FLASH_SIZE,
	.buswidth =	1,
};

static struct mtd_partition ocotea_small_partitions[] = {
	{
		.name =   "pibs",
		.offset = 0x0,
		.size =   0x100000,
	}
};

static struct mtd_partition ocotea_large_partitions[] = {
	{
		.name =   "fs",
		.offset = 0,
		.size =   0x300000,
	},
	{
		.name =   "firmware",
		.offset = 0x300000,
		.size =   0x100000,
	}
};

#define NB_OF(x)  (sizeof(x)/sizeof(x[0]))

int __init init_ocotea(void)
{
	u8 fpga0_reg;
	u8 *fpga0_adr;
	unsigned long long small_flash_base, large_flash_base;

	fpga0_adr = ioremap64(OCOTEA_FPGA_ADDR, 16);
	if (!fpga0_adr)
		return -ENOMEM;

	fpga0_reg = readb((unsigned long)fpga0_adr);
	iounmap(fpga0_adr);

	if (OCOTEA_BOOT_LARGE_FLASH(fpga0_reg)) {
		small_flash_base = OCOTEA_SMALL_FLASH_HIGH;
		large_flash_base = OCOTEA_LARGE_FLASH_LOW;
	}
	else {
		small_flash_base = OCOTEA_SMALL_FLASH_LOW;
		large_flash_base = OCOTEA_LARGE_FLASH_HIGH;
	}

	ocotea_small_map.phys = small_flash_base;
	ocotea_small_map.virt = ioremap64(small_flash_base,
					 ocotea_small_map.size);

	if (!ocotea_small_map.virt) {
		printk("Failed to ioremap flash\n");
		return -EIO;
	}

	simple_map_init(&ocotea_small_map);

	flash = do_map_probe("map_rom", &ocotea_small_map);
	if (flash) {
		flash->owner = THIS_MODULE;
		add_mtd_partitions(flash, ocotea_small_partitions,
					NB_OF(ocotea_small_partitions));
	} else {
		printk("map probe failed for flash\n");
		return -ENXIO;
	}

	ocotea_large_map.phys = large_flash_base;
	ocotea_large_map.virt = ioremap64(large_flash_base,
					 ocotea_large_map.size);

	if (!ocotea_large_map.virt) {
		printk("Failed to ioremap flash\n");
		return -EIO;
	}

	simple_map_init(&ocotea_large_map);

	flash = do_map_probe("cfi_probe", &ocotea_large_map);
	if (flash) {
		flash->owner = THIS_MODULE;
		add_mtd_partitions(flash, ocotea_large_partitions,
					NB_OF(ocotea_large_partitions));
	} else {
		printk("map probe failed for flash\n");
		return -ENXIO;
	}

	return 0;
}

static void __exit cleanup_ocotea(void)
{
	if (flash) {
		del_mtd_partitions(flash);
		map_destroy(flash);
	}

	if (ocotea_small_map.virt) {
		iounmap((void *)ocotea_small_map.virt);
		ocotea_small_map.virt = 0;
	}

	if (ocotea_large_map.virt) {
		iounmap((void *)ocotea_large_map.virt);
		ocotea_large_map.virt = 0;
	}
}

module_init(init_ocotea);
module_exit(cleanup_ocotea);

MODULE_LICENSE("GPL");
MODULE_AUTHOR("Matt Porter <mporter@kernel.crashing.org>");
MODULE_DESCRIPTION("MTD map and partitions for IBM 440GX Ocotea boards");