Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1 | /* |
Thomas Gleixner | 69f34c9 | 2005-11-07 11:15:40 +0000 | [diff] [blame] | 2 | * Flash memory access on Hynix GMS30C7201/HMS30C7202 based |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 3 | * evaluation boards |
Thomas Gleixner | 69f34c9 | 2005-11-07 11:15:40 +0000 | [diff] [blame] | 4 | * |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 5 | * (C) 2002 Jungjun Kim <jungjun.kim@hynix.com> |
Thomas Gleixner | 69f34c9 | 2005-11-07 11:15:40 +0000 | [diff] [blame] | 6 | * 2003 Thomas Gleixner <tglx@linutronix.de> |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 7 | */ |
| 8 | |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 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> |
Russell King | a09e64f | 2008-08-05 16:14:15 +0100 | [diff] [blame] | 19 | #include <mach/hardware.h> |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 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, |
| 27 | .size = FLASH_SIZE, |
| 28 | .phys = FLASH_PHYS, |
| 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 | |
Tobias Klauser | 87d10f3 | 2006-03-31 02:29:45 -0800 | [diff] [blame] | 59 | #define NUM_PARTITIONS ARRAY_SIZE(h720x_partitions) |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 60 | |
| 61 | static int nr_mtd_parts; |
| 62 | static struct mtd_partition *mtd_parts; |
| 63 | static const char *probes[] = { "cmdlinepart", NULL }; |
| 64 | |
| 65 | /* |
| 66 | * Initialize FLASH support |
| 67 | */ |
| 68 | int __init h720x_mtd_init(void) |
| 69 | { |
| 70 | |
| 71 | char *part_type = NULL; |
Thomas Gleixner | 69f34c9 | 2005-11-07 11:15:40 +0000 | [diff] [blame] | 72 | |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 73 | h720x_map.virt = ioremap(FLASH_PHYS, FLASH_SIZE); |
| 74 | |
| 75 | if (!h720x_map.virt) { |
| 76 | printk(KERN_ERR "H720x-MTD: ioremap failed\n"); |
| 77 | return -EIO; |
| 78 | } |
| 79 | |
| 80 | simple_map_init(&h720x_map); |
| 81 | |
| 82 | // Probe for flash bankwidth 4 |
| 83 | printk (KERN_INFO "H720x-MTD probing 32bit FLASH\n"); |
| 84 | mymtd = do_map_probe("cfi_probe", &h720x_map); |
| 85 | if (!mymtd) { |
| 86 | printk (KERN_INFO "H720x-MTD probing 16bit FLASH\n"); |
| 87 | // Probe for bankwidth 2 |
| 88 | h720x_map.bankwidth = 2; |
| 89 | mymtd = do_map_probe("cfi_probe", &h720x_map); |
| 90 | } |
Thomas Gleixner | 69f34c9 | 2005-11-07 11:15:40 +0000 | [diff] [blame] | 91 | |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 92 | if (mymtd) { |
| 93 | mymtd->owner = THIS_MODULE; |
| 94 | |
| 95 | #ifdef CONFIG_MTD_PARTITIONS |
| 96 | nr_mtd_parts = parse_mtd_partitions(mymtd, probes, &mtd_parts, 0); |
| 97 | if (nr_mtd_parts > 0) |
| 98 | part_type = "command line"; |
| 99 | #endif |
| 100 | if (nr_mtd_parts <= 0) { |
| 101 | mtd_parts = h720x_partitions; |
| 102 | nr_mtd_parts = NUM_PARTITIONS; |
| 103 | part_type = "builtin"; |
| 104 | } |
| 105 | printk(KERN_INFO "Using %s partition table\n", part_type); |
| 106 | add_mtd_partitions(mymtd, mtd_parts, nr_mtd_parts); |
| 107 | return 0; |
| 108 | } |
| 109 | |
| 110 | iounmap((void *)h720x_map.virt); |
| 111 | return -ENXIO; |
| 112 | } |
| 113 | |
| 114 | /* |
| 115 | * Cleanup |
| 116 | */ |
| 117 | static void __exit h720x_mtd_cleanup(void) |
| 118 | { |
| 119 | |
| 120 | if (mymtd) { |
| 121 | del_mtd_partitions(mymtd); |
| 122 | map_destroy(mymtd); |
| 123 | } |
Thomas Gleixner | 69f34c9 | 2005-11-07 11:15:40 +0000 | [diff] [blame] | 124 | |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 125 | /* Free partition info, if commandline partition was used */ |
| 126 | if (mtd_parts && (mtd_parts != h720x_partitions)) |
| 127 | kfree (mtd_parts); |
Thomas Gleixner | 69f34c9 | 2005-11-07 11:15:40 +0000 | [diff] [blame] | 128 | |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 129 | if (h720x_map.virt) { |
| 130 | iounmap((void *)h720x_map.virt); |
| 131 | h720x_map.virt = 0; |
| 132 | } |
| 133 | } |
| 134 | |
| 135 | |
| 136 | module_init(h720x_mtd_init); |
| 137 | module_exit(h720x_mtd_cleanup); |
| 138 | |
| 139 | MODULE_LICENSE("GPL"); |
| 140 | MODULE_AUTHOR("Thomas Gleixner <tglx@linutronix.de>"); |
| 141 | MODULE_DESCRIPTION("MTD map driver for Hynix evaluation boards"); |