aboutsummaryrefslogtreecommitdiffstats
path: root/drivers/mtd/maps/h720x-flash.c
blob: 873ff1523bbef3dd20053afaf4050e6c4ee2deaa (plain) (blame)
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
/*
 * Flash memory access on Hynix GMS30C7201/HMS30C7202 based
 * evaluation boards
 *
 * (C) 2002 Jungjun Kim <jungjun.kim@hynix.com>
 *     2003 Thomas Gleixner <tglx@linutronix.de>
 */

#include <linux/module.h>
#include <linux/types.h>
#include <linux/kernel.h>
#include <linux/init.h>
#include <linux/errno.h>
#include <linux/slab.h>

#include <linux/mtd/mtd.h>
#include <linux/mtd/map.h>
#include <linux/mtd/partitions.h>
#include <asm/arch/hardware.h>
#include <asm/io.h>

static struct mtd_info *mymtd;

static struct map_info h720x_map = {
	.name =		"H720X",
	.bankwidth =	4,
	.size =		FLASH_SIZE,
	.phys =		FLASH_PHYS,
};

static struct mtd_partition h720x_partitions[] = {
        {
                .name = "ArMon",
                .size = 0x00080000,
                .offset = 0,
                .mask_flags = MTD_WRITEABLE
        },{
                .name = "Env",
                .size = 0x00040000,
                .offset = 0x00080000,
                .mask_flags = MTD_WRITEABLE
        },{
                .name = "Kernel",
                .size = 0x00180000,
                .offset = 0x000c0000,
                .mask_flags = MTD_WRITEABLE
        },{
                .name = "Ramdisk",
                .size = 0x00400000,
                .offset = 0x00240000,
                .mask_flags = MTD_WRITEABLE
        },{
                .name = "jffs2",
                .size = MTDPART_SIZ_FULL,
                .offset = MTDPART_OFS_APPEND
        }
};

#define NUM_PARTITIONS ARRAY_SIZE(h720x_partitions)

static int                   nr_mtd_parts;
static struct mtd_partition *mtd_parts;
static const char *probes[] = { "cmdlinepart", NULL };

/*
 * Initialize FLASH support
 */
int __init h720x_mtd_init(void)
{

	char	*part_type = NULL;

	h720x_map.virt = ioremap(FLASH_PHYS, FLASH_SIZE);

	if (!h720x_map.virt) {
		printk(KERN_ERR "H720x-MTD: ioremap failed\n");
		return -EIO;
	}

	simple_map_init(&h720x_map);

	// Probe for flash bankwidth 4
	printk (KERN_INFO "H720x-MTD probing 32bit FLASH\n");
	mymtd = do_map_probe("cfi_probe", &h720x_map);
	if (!mymtd) {
		printk (KERN_INFO "H720x-MTD probing 16bit FLASH\n");
	    // Probe for bankwidth 2
	    h720x_map.bankwidth = 2;
	    mymtd = do_map_probe("cfi_probe", &h720x_map);
	}

	if (mymtd) {
		mymtd->owner = THIS_MODULE;

#ifdef CONFIG_MTD_PARTITIONS
		nr_mtd_parts = parse_mtd_partitions(mymtd, probes, &mtd_parts, 0);
		if (nr_mtd_parts > 0)
			part_type = "command line";
#endif
		if (nr_mtd_parts <= 0) {
			mtd_parts = h720x_partitions;
			nr_mtd_parts = NUM_PARTITIONS;
			part_type = "builtin";
		}
		printk(KERN_INFO "Using %s partition table\n", part_type);
		add_mtd_partitions(mymtd, mtd_parts, nr_mtd_parts);
		return 0;
	}

	iounmap((void *)h720x_map.virt);
	return -ENXIO;
}

/*
 * Cleanup
 */
static void __exit h720x_mtd_cleanup(void)
{

	if (mymtd) {
		del_mtd_partitions(mymtd);
		map_destroy(mymtd);
	}

	/* Free partition info, if commandline partition was used */
	if (mtd_parts && (mtd_parts != h720x_partitions))
		kfree (mtd_parts);

	if (h720x_map.virt) {
		iounmap((void *)h720x_map.virt);
		h720x_map.virt = 0;
	}
}


module_init(h720x_mtd_init);
module_exit(h720x_mtd_cleanup);

MODULE_LICENSE("GPL");
MODULE_AUTHOR("Thomas Gleixner <tglx@linutronix.de>");
MODULE_DESCRIPTION("MTD map driver for Hynix evaluation boards");