summaryrefslogtreecommitdiffstats
path: root/drivers/mtd/maps/impa7.c
blob: ba7f40311a7e359352156b2d9e51738b6cd7e55c (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
155
156
157
158
159
160
161
/*
 * $Id: impa7.c,v 1.14 2005/11/07 11:14:27 gleixner Exp $
 *
 * Handle mapping of the NOR flash on implementa A7 boards
 *
 * Copyright 2002 SYSGO Real-Time Solutions GmbH
 *
 * This program is free software; you can redistribute it and/or modify
 * it under the terms of the GNU General Public License version 2 as
 * published by the Free Software Foundation.
 */

#include <linux/module.h>
#include <linux/types.h>
#include <linux/kernel.h>
#include <linux/init.h>
#include <asm/io.h>
#include <linux/mtd/mtd.h>
#include <linux/mtd/map.h>
#include <linux/config.h>

#ifdef CONFIG_MTD_PARTITIONS
#include <linux/mtd/partitions.h>
#endif

#define WINDOW_ADDR0 0x00000000      /* physical properties of flash */
#define WINDOW_SIZE0 0x00800000
#define WINDOW_ADDR1 0x10000000      /* physical properties of flash */
#define WINDOW_SIZE1 0x00800000
#define NUM_FLASHBANKS 2
#define BUSWIDTH     4

/* can be { "cfi_probe", "jedec_probe", "map_rom", NULL } */
#define PROBETYPES { "jedec_probe", NULL }

#define MSG_PREFIX "impA7:"   /* prefix for our printk()'s */
#define MTDID      "impa7-%d"  /* for mtdparts= partitioning */

static struct mtd_info *impa7_mtd[NUM_FLASHBANKS];


static struct map_info impa7_map[NUM_FLASHBANKS] = {
	{
		.name = "impA7 NOR Flash Bank #0",
		.size = WINDOW_SIZE0,
		.bankwidth = BUSWIDTH,
	},
	{
		.name = "impA7 NOR Flash Bank #1",
		.size = WINDOW_SIZE1,
		.bankwidth = BUSWIDTH,
	},
};

#ifdef CONFIG_MTD_PARTITIONS

/*
 * MTD partitioning stuff
 */
static struct mtd_partition static_partitions[] =
{
	{
		.name = "FileSystem",
		.size = 0x800000,
		.offset = 0x00000000
	},
};

static int mtd_parts_nb[NUM_FLASHBANKS];
static struct mtd_partition *mtd_parts[NUM_FLASHBANKS];

#endif

static const char *probes[] = { "cmdlinepart", NULL };

int __init init_impa7(void)
{
	static const char *rom_probe_types[] = PROBETYPES;
	const char **type;
	const char *part_type = 0;
	int i;
	static struct { u_long addr; u_long size; } pt[NUM_FLASHBANKS] = {
	  { WINDOW_ADDR0, WINDOW_SIZE0 },
	  { WINDOW_ADDR1, WINDOW_SIZE1 },
        };
	int devicesfound = 0;

	for(i=0; i<NUM_FLASHBANKS; i++)
	{
		printk(KERN_NOTICE MSG_PREFIX "probing 0x%08lx at 0x%08lx\n",
		       pt[i].size, pt[i].addr);

		impa7_map[i].phys = pt[i].addr;
		impa7_map[i].virt = ioremap(pt[i].addr, pt[i].size);
		if (!impa7_map[i].virt) {
			printk(MSG_PREFIX "failed to ioremap\n");
			return -EIO;
		}
		simple_map_init(&impa7_map[i]);

		impa7_mtd[i] = 0;
		type = rom_probe_types;
		for(; !impa7_mtd[i] && *type; type++) {
			impa7_mtd[i] = do_map_probe(*type, &impa7_map[i]);
		}

		if (impa7_mtd[i]) {
			impa7_mtd[i]->owner = THIS_MODULE;
			devicesfound++;
#ifdef CONFIG_MTD_PARTITIONS
			mtd_parts_nb[i] = parse_mtd_partitions(impa7_mtd[i],
							       probes,
							       &mtd_parts[i],
							       0);
			if (mtd_parts_nb[i] > 0) {
				part_type = "command line";
			} else {
				mtd_parts[i] = static_partitions;
				mtd_parts_nb[i] = ARRAY_SIZE(static_partitions);
				part_type = "static";
			}

			printk(KERN_NOTICE MSG_PREFIX
			       "using %s partition definition\n",
			       part_type);
			add_mtd_partitions(impa7_mtd[i],
					   mtd_parts[i], mtd_parts_nb[i]);
#else
			add_mtd_device(impa7_mtd[i]);

#endif
		}
		else
			iounmap((void *)impa7_map[i].virt);
	}
	return devicesfound == 0 ? -ENXIO : 0;
}

static void __exit cleanup_impa7(void)
{
	int i;
	for (i=0; i<NUM_FLASHBANKS; i++) {
		if (impa7_mtd[i]) {
#ifdef CONFIG_MTD_PARTITIONS
			del_mtd_partitions(impa7_mtd[i]);
#else
			del_mtd_device(impa7_mtd[i]);
#endif
			map_destroy(impa7_mtd[i]);
			iounmap((void *)impa7_map[i].virt);
			impa7_map[i].virt = 0;
		}
	}
}

module_init(init_impa7);
module_exit(cleanup_impa7);

MODULE_LICENSE("GPL");
MODULE_AUTHOR("Pavel Bartusek <pba@sysgo.de>");
MODULE_DESCRIPTION("MTD map driver for implementa impA7");
OpenPOWER on IntegriCloud