Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1 | /* |
| 2 | * Flash memory access on Alchemy Pb1xxx boards |
| 3 | * |
| 4 | * (C) 2001 Pete Popov <ppopov@mvista.com> |
| 5 | * |
| 6 | * $Id: pb1xxx-flash.c,v 1.14 2004/11/04 13:24:15 gleixner Exp $ |
| 7 | */ |
| 8 | |
| 9 | #include <linux/config.h> |
| 10 | #include <linux/module.h> |
| 11 | #include <linux/types.h> |
| 12 | #include <linux/init.h> |
| 13 | #include <linux/kernel.h> |
| 14 | |
| 15 | #include <linux/mtd/mtd.h> |
| 16 | #include <linux/mtd/map.h> |
| 17 | #include <linux/mtd/partitions.h> |
| 18 | |
| 19 | #include <asm/io.h> |
| 20 | |
| 21 | #ifdef DEBUG_RW |
| 22 | #define DBG(x...) printk(x) |
| 23 | #else |
| 24 | #define DBG(x...) |
| 25 | #endif |
| 26 | |
| 27 | #ifdef CONFIG_MIPS_PB1000 |
| 28 | |
| 29 | #define WINDOW_ADDR 0x1F800000 |
| 30 | #define WINDOW_SIZE 0x800000 |
| 31 | |
| 32 | static struct mtd_partition pb1xxx_partitions[] = { |
| 33 | { |
| 34 | .name = "yamon env", |
| 35 | .size = 0x00020000, |
| 36 | .offset = 0, |
| 37 | .mask_flags = MTD_WRITEABLE}, |
| 38 | { |
| 39 | .name = "User FS", |
| 40 | .size = 0x003e0000, |
| 41 | .offset = 0x20000,}, |
| 42 | { |
| 43 | .name = "boot code", |
| 44 | .size = 0x100000, |
| 45 | .offset = 0x400000, |
| 46 | .mask_flags = MTD_WRITEABLE}, |
| 47 | { |
| 48 | .name = "raw/kernel", |
| 49 | .size = 0x300000, |
| 50 | .offset = 0x500000} |
| 51 | }; |
| 52 | |
| 53 | #elif defined(CONFIG_MIPS_PB1500) || defined(CONFIG_MIPS_PB1100) |
| 54 | |
| 55 | #if defined(CONFIG_MTD_PB1500_BOOT) && defined(CONFIG_MTD_PB1500_USER) |
| 56 | /* both 32MB banks will be used. Combine the first 32MB bank and the |
| 57 | * first 28MB of the second bank together into a single jffs/jffs2 |
| 58 | * partition. |
| 59 | */ |
| 60 | #define WINDOW_ADDR 0x1C000000 |
| 61 | #define WINDOW_SIZE 0x4000000 |
| 62 | static struct mtd_partition pb1xxx_partitions[] = { |
| 63 | { |
| 64 | .name = "User FS", |
| 65 | .size = 0x3c00000, |
| 66 | .offset = 0x0000000 |
| 67 | },{ |
| 68 | .name = "yamon", |
| 69 | .size = 0x0100000, |
| 70 | .offset = 0x3c00000, |
| 71 | .mask_flags = MTD_WRITEABLE |
| 72 | },{ |
| 73 | .name = "raw kernel", |
| 74 | .size = 0x02c0000, |
| 75 | .offset = 0x3d00000 |
| 76 | } |
| 77 | }; |
| 78 | #elif defined(CONFIG_MTD_PB1500_BOOT) && !defined(CONFIG_MTD_PB1500_USER) |
| 79 | #define WINDOW_ADDR 0x1E000000 |
| 80 | #define WINDOW_SIZE 0x2000000 |
| 81 | static struct mtd_partition pb1xxx_partitions[] = { |
| 82 | { |
| 83 | .name = "User FS", |
| 84 | .size = 0x1c00000, |
| 85 | .offset = 0x0000000 |
| 86 | },{ |
| 87 | .name = "yamon", |
| 88 | .size = 0x0100000, |
| 89 | .offset = 0x1c00000, |
| 90 | .mask_flags = MTD_WRITEABLE |
| 91 | },{ |
| 92 | .name = "raw kernel", |
| 93 | .size = 0x02c0000, |
| 94 | .offset = 0x1d00000 |
| 95 | } |
| 96 | }; |
| 97 | #elif !defined(CONFIG_MTD_PB1500_BOOT) && defined(CONFIG_MTD_PB1500_USER) |
| 98 | #define WINDOW_ADDR 0x1C000000 |
| 99 | #define WINDOW_SIZE 0x2000000 |
| 100 | static struct mtd_partition pb1xxx_partitions[] = { |
| 101 | { |
| 102 | .name = "User FS", |
| 103 | .size = 0x1e00000, |
| 104 | .offset = 0x0000000 |
| 105 | },{ |
| 106 | .name = "raw kernel", |
| 107 | .size = 0x0200000, |
| 108 | .offset = 0x1e00000, |
| 109 | } |
| 110 | }; |
| 111 | #else |
| 112 | #error MTD_PB1500 define combo error /* should never happen */ |
| 113 | #endif |
| 114 | #else |
| 115 | #error Unsupported board |
| 116 | #endif |
| 117 | |
| 118 | #define NAME "Pb1x00 Linux Flash" |
| 119 | #define PADDR WINDOW_ADDR |
| 120 | #define BUSWIDTH 4 |
| 121 | #define SIZE WINDOW_SIZE |
| 122 | #define PARTITIONS 4 |
| 123 | |
| 124 | static struct map_info pb1xxx_mtd_map = { |
| 125 | .name = NAME, |
| 126 | .size = SIZE, |
| 127 | .bankwidth = BUSWIDTH, |
| 128 | .phys = PADDR, |
| 129 | }; |
| 130 | |
| 131 | static struct mtd_info *pb1xxx_mtd; |
| 132 | |
| 133 | int __init pb1xxx_mtd_init(void) |
| 134 | { |
| 135 | struct mtd_partition *parts; |
| 136 | int nb_parts = 0; |
| 137 | char *part_type; |
| 138 | |
| 139 | /* |
| 140 | * Static partition definition selection |
| 141 | */ |
| 142 | part_type = "static"; |
| 143 | parts = pb1xxx_partitions; |
| 144 | nb_parts = ARRAY_SIZE(pb1xxx_partitions); |
| 145 | |
| 146 | /* |
| 147 | * Now let's probe for the actual flash. Do it here since |
| 148 | * specific machine settings might have been set above. |
| 149 | */ |
| 150 | printk(KERN_NOTICE "Pb1xxx flash: probing %d-bit flash bus\n", |
| 151 | BUSWIDTH*8); |
| 152 | pb1xxx_mtd_map.virt = ioremap(WINDOW_ADDR, WINDOW_SIZE); |
| 153 | |
| 154 | simple_map_init(&pb1xxx_mtd_map); |
| 155 | |
| 156 | pb1xxx_mtd = do_map_probe("cfi_probe", &pb1xxx_mtd_map); |
| 157 | if (!pb1xxx_mtd) return -ENXIO; |
| 158 | pb1xxx_mtd->owner = THIS_MODULE; |
| 159 | |
| 160 | add_mtd_partitions(pb1xxx_mtd, parts, nb_parts); |
| 161 | return 0; |
| 162 | } |
| 163 | |
| 164 | static void __exit pb1xxx_mtd_cleanup(void) |
| 165 | { |
| 166 | if (pb1xxx_mtd) { |
| 167 | del_mtd_partitions(pb1xxx_mtd); |
| 168 | map_destroy(pb1xxx_mtd); |
| 169 | iounmap((void *) pb1xxx_mtd_map.virt); |
| 170 | } |
| 171 | } |
| 172 | |
| 173 | module_init(pb1xxx_mtd_init); |
| 174 | module_exit(pb1xxx_mtd_cleanup); |
| 175 | |
| 176 | MODULE_AUTHOR("Pete Popov"); |
| 177 | MODULE_DESCRIPTION("Pb1xxx CFI map driver"); |
| 178 | MODULE_LICENSE("GPL"); |