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Commit | Line | Data |
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1da177e4 | 1 | /* |
69f34c98 | 2 | * Flash memory access on Hynix GMS30C7201/HMS30C7202 based |
1da177e4 | 3 | * evaluation boards |
69f34c98 TG |
4 | * |
5 | * $Id: h720x-flash.c,v 1.12 2005/11/07 11:14:27 gleixner Exp $ | |
1da177e4 LT |
6 | * |
7 | * (C) 2002 Jungjun Kim <jungjun.kim@hynix.com> | |
69f34c98 | 8 | * 2003 Thomas Gleixner <tglx@linutronix.de> |
1da177e4 LT |
9 | */ |
10 | ||
1da177e4 LT |
11 | #include <linux/module.h> |
12 | #include <linux/types.h> | |
13 | #include <linux/kernel.h> | |
14 | #include <linux/init.h> | |
15 | #include <linux/errno.h> | |
16 | #include <linux/slab.h> | |
17 | ||
18 | #include <linux/mtd/mtd.h> | |
19 | #include <linux/mtd/map.h> | |
20 | #include <linux/mtd/partitions.h> | |
21 | #include <asm/hardware.h> | |
22 | #include <asm/io.h> | |
23 | ||
24 | static struct mtd_info *mymtd; | |
25 | ||
26 | static struct map_info h720x_map = { | |
27 | .name = "H720X", | |
28 | .bankwidth = 4, | |
29 | .size = FLASH_SIZE, | |
30 | .phys = FLASH_PHYS, | |
31 | }; | |
32 | ||
33 | static struct mtd_partition h720x_partitions[] = { | |
34 | { | |
35 | .name = "ArMon", | |
36 | .size = 0x00080000, | |
37 | .offset = 0, | |
38 | .mask_flags = MTD_WRITEABLE | |
39 | },{ | |
40 | .name = "Env", | |
41 | .size = 0x00040000, | |
42 | .offset = 0x00080000, | |
43 | .mask_flags = MTD_WRITEABLE | |
44 | },{ | |
45 | .name = "Kernel", | |
46 | .size = 0x00180000, | |
47 | .offset = 0x000c0000, | |
48 | .mask_flags = MTD_WRITEABLE | |
49 | },{ | |
50 | .name = "Ramdisk", | |
51 | .size = 0x00400000, | |
52 | .offset = 0x00240000, | |
53 | .mask_flags = MTD_WRITEABLE | |
54 | },{ | |
55 | .name = "jffs2", | |
56 | .size = MTDPART_SIZ_FULL, | |
57 | .offset = MTDPART_OFS_APPEND | |
58 | } | |
59 | }; | |
60 | ||
87d10f3c | 61 | #define NUM_PARTITIONS ARRAY_SIZE(h720x_partitions) |
1da177e4 LT |
62 | |
63 | static int nr_mtd_parts; | |
64 | static struct mtd_partition *mtd_parts; | |
65 | static const char *probes[] = { "cmdlinepart", NULL }; | |
66 | ||
67 | /* | |
68 | * Initialize FLASH support | |
69 | */ | |
70 | int __init h720x_mtd_init(void) | |
71 | { | |
72 | ||
73 | char *part_type = NULL; | |
69f34c98 | 74 | |
1da177e4 LT |
75 | h720x_map.virt = ioremap(FLASH_PHYS, FLASH_SIZE); |
76 | ||
77 | if (!h720x_map.virt) { | |
78 | printk(KERN_ERR "H720x-MTD: ioremap failed\n"); | |
79 | return -EIO; | |
80 | } | |
81 | ||
82 | simple_map_init(&h720x_map); | |
83 | ||
84 | // Probe for flash bankwidth 4 | |
85 | printk (KERN_INFO "H720x-MTD probing 32bit FLASH\n"); | |
86 | mymtd = do_map_probe("cfi_probe", &h720x_map); | |
87 | if (!mymtd) { | |
88 | printk (KERN_INFO "H720x-MTD probing 16bit FLASH\n"); | |
89 | // Probe for bankwidth 2 | |
90 | h720x_map.bankwidth = 2; | |
91 | mymtd = do_map_probe("cfi_probe", &h720x_map); | |
92 | } | |
69f34c98 | 93 | |
1da177e4 LT |
94 | if (mymtd) { |
95 | mymtd->owner = THIS_MODULE; | |
96 | ||
97 | #ifdef CONFIG_MTD_PARTITIONS | |
98 | nr_mtd_parts = parse_mtd_partitions(mymtd, probes, &mtd_parts, 0); | |
99 | if (nr_mtd_parts > 0) | |
100 | part_type = "command line"; | |
101 | #endif | |
102 | if (nr_mtd_parts <= 0) { | |
103 | mtd_parts = h720x_partitions; | |
104 | nr_mtd_parts = NUM_PARTITIONS; | |
105 | part_type = "builtin"; | |
106 | } | |
107 | printk(KERN_INFO "Using %s partition table\n", part_type); | |
108 | add_mtd_partitions(mymtd, mtd_parts, nr_mtd_parts); | |
109 | return 0; | |
110 | } | |
111 | ||
112 | iounmap((void *)h720x_map.virt); | |
113 | return -ENXIO; | |
114 | } | |
115 | ||
116 | /* | |
117 | * Cleanup | |
118 | */ | |
119 | static void __exit h720x_mtd_cleanup(void) | |
120 | { | |
121 | ||
122 | if (mymtd) { | |
123 | del_mtd_partitions(mymtd); | |
124 | map_destroy(mymtd); | |
125 | } | |
69f34c98 | 126 | |
1da177e4 LT |
127 | /* Free partition info, if commandline partition was used */ |
128 | if (mtd_parts && (mtd_parts != h720x_partitions)) | |
129 | kfree (mtd_parts); | |
69f34c98 | 130 | |
1da177e4 LT |
131 | if (h720x_map.virt) { |
132 | iounmap((void *)h720x_map.virt); | |
133 | h720x_map.virt = 0; | |
134 | } | |
135 | } | |
136 | ||
137 | ||
138 | module_init(h720x_mtd_init); | |
139 | module_exit(h720x_mtd_cleanup); | |
140 | ||
141 | MODULE_LICENSE("GPL"); | |
142 | MODULE_AUTHOR("Thomas Gleixner <tglx@linutronix.de>"); | |
143 | MODULE_DESCRIPTION("MTD map driver for Hynix evaluation boards"); |