summaryrefslogtreecommitdiffstats
path: root/drivers/mtd/maps/redwood.c
blob: d2c9db00db0c43444f4c9ab4f841dd314a020d77 (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
/*
 * drivers/mtd/maps/redwood.c
 *
 * FLASH map for the IBM Redwood 4/5/6 boards.
 *
 * Author: MontaVista Software, Inc. <source@mvista.com>
 *
 * 2001-2003 (c) MontaVista, Software, Inc. This file is licensed under
 * the terms of the GNU General Public License version 2. This program
 * is licensed "as is" without any warranty of any kind, whether express
 * or implied.
 */

#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 <asm/io.h>

#define WINDOW_ADDR 0xffc00000
#define WINDOW_SIZE 0x00400000

#define RW_PART0_OF	0
#define RW_PART0_SZ	0x10000
#define RW_PART1_OF	RW_PART0_SZ
#define RW_PART1_SZ	0x200000 - 0x10000
#define RW_PART2_OF	0x200000
#define RW_PART2_SZ	0x10000
#define RW_PART3_OF	0x210000
#define RW_PART3_SZ	0x200000 - (0x10000 + 0x20000)
#define RW_PART4_OF	0x3e0000
#define RW_PART4_SZ	0x20000

static struct mtd_partition redwood_flash_partitions[] = {
	{
		.name = "Redwood OpenBIOS Vital Product Data",
		.offset = RW_PART0_OF,
		.size = RW_PART0_SZ,
		.mask_flags = MTD_WRITEABLE	/* force read-only */
	},
	{
		.name = "Redwood kernel",
		.offset = RW_PART1_OF,
		.size = RW_PART1_SZ
	},
	{
		.name = "Redwood OpenBIOS non-volatile storage",
		.offset = RW_PART2_OF,
		.size = RW_PART2_SZ,
		.mask_flags = MTD_WRITEABLE	/* force read-only */
	},
	{
		.name = "Redwood filesystem",
		.offset = RW_PART3_OF,
		.size = RW_PART3_SZ
	},
	{
		.name = "Redwood OpenBIOS",
		.offset = RW_PART4_OF,
		.size = RW_PART4_SZ,
		.mask_flags = MTD_WRITEABLE	/* force read-only */
	}
};

struct map_info redwood_flash_map = {
	.name = "IBM Redwood",
	.size = WINDOW_SIZE,
	.bankwidth = 2,
	.phys = WINDOW_ADDR,
};


#define NUM_REDWOOD_FLASH_PARTITIONS ARRAY_SIZE(redwood_flash_partitions)

static struct mtd_info *redwood_mtd;

static int __init init_redwood_flash(void)
{
	int err;

	printk(KERN_NOTICE "redwood: flash mapping: %x at %x\n",
			WINDOW_SIZE, WINDOW_ADDR);

	redwood_flash_map.virt = ioremap(WINDOW_ADDR, WINDOW_SIZE);

	if (!redwood_flash_map.virt) {
		printk("init_redwood_flash: failed to ioremap\n");
		return -EIO;
	}
	simple_map_init(&redwood_flash_map);

	redwood_mtd = do_map_probe("cfi_probe",&redwood_flash_map);

	if (redwood_mtd) {
		redwood_mtd->owner = THIS_MODULE;
		err = add_mtd_partitions(redwood_mtd,
				redwood_flash_partitions,
				NUM_REDWOOD_FLASH_PARTITIONS);
		if (err) {
			printk("init_redwood_flash: add_mtd_partitions failed\n");
			iounmap(redwood_flash_map.virt);
		}
		return err;

	}

	iounmap(redwood_flash_map.virt);
	return -ENXIO;
}

static void __exit cleanup_redwood_flash(void)
{
	if (redwood_mtd) {
		del_mtd_partitions(redwood_mtd);
		/* moved iounmap after map_destroy - armin */
		map_destroy(redwood_mtd);
		iounmap((void *)redwood_flash_map.virt);
	}
}

module_init(init_redwood_flash);
module_exit(cleanup_redwood_flash);

MODULE_LICENSE("GPL");
MODULE_AUTHOR("MontaVista Software <source@mvista.com>");
MODULE_DESCRIPTION("MTD map driver for the IBM Redwood reference boards");
OpenPOWER on IntegriCloud