projects / deliverable / linux.git / blame
| Commit | Line | Data |
|---|---|---|
| 1da177e4 | 1 | /* |
| 69f34c98 | 2 | * Flash memory access on Hynix GMS30C7201/HMS30C7202 based |
| 1da177e4 | 3 | * evaluation boards |
| 69f34c98 | 4 | * |
| 1da177e4 | 5 | * (C) 2002 Jungjun Kim <jungjun.kim@hynix.com> |
| 69f34c98 | 6 | * 2003 Thomas Gleixner <tglx@linutronix.de> |
| 1da177e4 LT |
7 | */ |
| 8 | ||
| 1da177e4 LT |
9 | #include <linux/module.h> |
| 10 | #include <linux/types.h> | |
| 11 | #include <linux/kernel.h> | |
| 12 | #include <linux/init.h> | |
| 13 | #include <linux/errno.h> | |
| 14 | #include <linux/slab.h> | |
| 15 | ||
| 16 | #include <linux/mtd/mtd.h> | |
| 17 | #include <linux/mtd/map.h> | |
| 18 | #include <linux/mtd/partitions.h> | |
| a09e64fb | 19 | #include <mach/hardware.h> |
| 1da177e4 LT |
20 | #include <asm/io.h> |
| 21 | ||
| 22 | static struct mtd_info *mymtd; | |
| 23 | ||
| 24 | static struct map_info h720x_map = { | |
| 25 | .name = "H720X", | |
| 26 | .bankwidth = 4, | |
| d9a682a5 RK |
27 | .size = H720X_FLASH_SIZE, |
| 28 | .phys = H720X_FLASH_PHYS, | |
| 1da177e4 LT |
29 | }; |
| 30 | ||
| 31 | static struct mtd_partition h720x_partitions[] = { | |
| 32 | { | |
| 33 | .name = "ArMon", | |
| 34 | .size = 0x00080000, | |
| 35 | .offset = 0, | |
| 36 | .mask_flags = MTD_WRITEABLE | |
| 37 | },{ | |
| 38 | .name = "Env", | |
| 39 | .size = 0x00040000, | |
| 40 | .offset = 0x00080000, | |
| 41 | .mask_flags = MTD_WRITEABLE | |
| 42 | },{ | |
| 43 | .name = "Kernel", | |
| 44 | .size = 0x00180000, | |
| 45 | .offset = 0x000c0000, | |
| 46 | .mask_flags = MTD_WRITEABLE | |
| 47 | },{ | |
| 48 | .name = "Ramdisk", | |
| 49 | .size = 0x00400000, | |
| 50 | .offset = 0x00240000, | |
| 51 | .mask_flags = MTD_WRITEABLE | |
| 52 | },{ | |
| 53 | .name = "jffs2", | |
| 54 | .size = MTDPART_SIZ_FULL, | |
| 55 | .offset = MTDPART_OFS_APPEND | |
| 56 | } | |
| 57 | }; | |
| 58 | ||
| 87d10f3c | 59 | #define NUM_PARTITIONS ARRAY_SIZE(h720x_partitions) |
| 1da177e4 LT |
60 | |
| 61 | static int nr_mtd_parts; | |
| 62 | static struct mtd_partition *mtd_parts; | |
| 1da177e4 LT |
63 | /* |
| 64 | * Initialize FLASH support | |
| 65 | */ | |
| 2257594f | 66 | static int __init h720x_mtd_init(void) |
| 1da177e4 LT |
67 | { |
| 68 | ||
| 69 | char *part_type = NULL; | |
| 69f34c98 | 70 | |
| d9a682a5 | 71 | h720x_map.virt = ioremap(h720x_map.phys, h720x_map.size); |
| 1da177e4 LT |
72 | |
| 73 | if (!h720x_map.virt) { | |
| 74 | printk(KERN_ERR "H720x-MTD: ioremap failed\n"); | |
| 75 | return -EIO; | |
| 76 | } | |
| 77 | ||
| 78 | simple_map_init(&h720x_map); | |
| 79 | ||
| 80 | // Probe for flash bankwidth 4 | |
| 81 | printk (KERN_INFO "H720x-MTD probing 32bit FLASH\n"); | |
| 82 | mymtd = do_map_probe("cfi_probe", &h720x_map); | |
| 83 | if (!mymtd) { | |
| 84 | printk (KERN_INFO "H720x-MTD probing 16bit FLASH\n"); | |
| 85 | // Probe for bankwidth 2 | |
| 86 | h720x_map.bankwidth = 2; | |
| 87 | mymtd = do_map_probe("cfi_probe", &h720x_map); | |
| 88 | } | |
| 69f34c98 | 89 | |
| 1da177e4 LT |
90 | if (mymtd) { |
| 91 | mymtd->owner = THIS_MODULE; | |
| 92 | ||
| 3af035c9 | 93 | nr_mtd_parts = parse_mtd_partitions(mymtd, NULL, &mtd_parts, 0); |
| 1da177e4 LT |
94 | if (nr_mtd_parts > 0) |
| 95 | part_type = "command line"; | |
| 1da177e4 LT |
96 | if (nr_mtd_parts <= 0) { |
| 97 | mtd_parts = h720x_partitions; | |
| 98 | nr_mtd_parts = NUM_PARTITIONS; | |
| 99 | part_type = "builtin"; | |
| 100 | } | |
| 101 | printk(KERN_INFO "Using %s partition table\n", part_type); | |
| 360e40ae | 102 | mtd_device_register(mymtd, mtd_parts, nr_mtd_parts); |
| 1da177e4 LT |
103 | return 0; |
| 104 | } | |
| 105 | ||
| 106 | iounmap((void *)h720x_map.virt); | |
| 107 | return -ENXIO; | |
| 108 | } | |
| 109 | ||
| 110 | /* | |
| 111 | * Cleanup | |
| 112 | */ | |
| 113 | static void __exit h720x_mtd_cleanup(void) | |
| 114 | { | |
| 115 | ||
| 116 | if (mymtd) { | |
| 360e40ae | 117 | mtd_device_unregister(mymtd); |
| 1da177e4 LT |
118 | map_destroy(mymtd); |
| 119 | } | |
| 69f34c98 | 120 | |
| 1da177e4 LT |
121 | /* Free partition info, if commandline partition was used */ |
| 122 | if (mtd_parts && (mtd_parts != h720x_partitions)) | |
| 123 | kfree (mtd_parts); | |
| 69f34c98 | 124 | |
| 1da177e4 LT |
125 | if (h720x_map.virt) { |
| 126 | iounmap((void *)h720x_map.virt); | |
| 127 | h720x_map.virt = 0; | |
| 128 | } | |
| 129 | } | |
| 130 | ||
| 131 | ||
| 132 | module_init(h720x_mtd_init); | |
| 133 | module_exit(h720x_mtd_cleanup); | |
| 134 | ||
| 135 | MODULE_LICENSE("GPL"); | |
| 136 | MODULE_AUTHOR("Thomas Gleixner <tglx@linutronix.de>"); | |
| 137 | MODULE_DESCRIPTION("MTD map driver for Hynix evaluation boards"); |