| 1 | /* |
| 2 | * ar525w RDC321x platform devices |
| 3 | * |
| 4 | * Copyright (C) 2007-2009 OpenWrt.org |
| 5 | * Copyright (C) 2007 Florian Fainelli <florian@openwrt.org> |
| 6 | * Copyright (C) 2008-2009 Daniel Gimpelevich <daniel@gimpelevich.san-francisco.ca.us> |
| 7 | * |
| 8 | * This program is free software; you can redistribute it and/or |
| 9 | * modify it under the terms of the GNU General Public License |
| 10 | * as published by the Free Software Foundation; either version 2 |
| 11 | * of the License, or (at your option) any later version. |
| 12 | * |
| 13 | * This program is distributed in the hope that it will be useful, |
| 14 | * but WITHOUT ANY WARRANTY; without even the implied warranty of |
| 15 | * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the |
| 16 | * GNU General Public License for more details. |
| 17 | * |
| 18 | * You should have received a copy of the GNU General Public License |
| 19 | * along with this program; if not, write to the |
| 20 | * Free Software Foundation, Inc., 51 Franklin Street, Fifth Floor, |
| 21 | * Boston, MA 02110-1301, USA. |
| 22 | * |
| 23 | */ |
| 24 | |
| 25 | #include <linux/init.h> |
| 26 | #include <linux/mtd/physmap.h> |
| 27 | #include <linux/input.h> |
| 28 | #include <linux/vmalloc.h> |
| 29 | #include <linux/mtd/mtd.h> |
| 30 | |
| 31 | #include <asm/rdc_boards.h> |
| 32 | |
| 33 | struct image_header { |
| 34 | char magic[4]; /* ASICII: GMTK */ |
| 35 | u32 checksum; /* CRC32 */ |
| 36 | u32 version; /* x.x.x.x */ |
| 37 | u32 kernelsz; /* The size of the kernel image */ |
| 38 | u32 imagesz; /* The length of this image file ( kernel + romfs + this header) */ |
| 39 | u32 pid; /* Product ID */ |
| 40 | u32 fastcksum; /* Partial CRC32 on (First(256), medium(256), last(512)) */ |
| 41 | u32 reserved; |
| 42 | }; |
| 43 | |
| 44 | static struct gpio_led ar525w_leds[] = { |
| 45 | { .name = "rdc321x:dmz", .gpio = 1, .active_low = 1}, |
| 46 | }; |
| 47 | static struct gpio_button ar525w_btns[] = { |
| 48 | { |
| 49 | .gpio = 6, |
| 50 | .code = BTN_0, |
| 51 | .desc = "Reset", |
| 52 | .active_low = 1, |
| 53 | } |
| 54 | }; |
| 55 | |
| 56 | static u32 __initdata crctab[257] = { |
| 57 | 0x00000000, 0x77073096, 0xee0e612c, 0x990951ba, |
| 58 | 0x076dc419, 0x706af48f, 0xe963a535, 0x9e6495a3, |
| 59 | 0x0edb8832, 0x79dcb8a4, 0xe0d5e91e, 0x97d2d988, |
| 60 | 0x09b64c2b, 0x7eb17cbd, 0xe7b82d07, 0x90bf1d91, |
| 61 | 0x1db71064, 0x6ab020f2, 0xf3b97148, 0x84be41de, |
| 62 | 0x1adad47d, 0x6ddde4eb, 0xf4d4b551, 0x83d385c7, |
| 63 | 0x136c9856, 0x646ba8c0, 0xfd62f97a, 0x8a65c9ec, |
| 64 | 0x14015c4f, 0x63066cd9, 0xfa0f3d63, 0x8d080df5, |
| 65 | 0x3b6e20c8, 0x4c69105e, 0xd56041e4, 0xa2677172, |
| 66 | 0x3c03e4d1, 0x4b04d447, 0xd20d85fd, 0xa50ab56b, |
| 67 | 0x35b5a8fa, 0x42b2986c, 0xdbbbc9d6, 0xacbcf940, |
| 68 | 0x32d86ce3, 0x45df5c75, 0xdcd60dcf, 0xabd13d59, |
| 69 | 0x26d930ac, 0x51de003a, 0xc8d75180, 0xbfd06116, |
| 70 | 0x21b4f4b5, 0x56b3c423, 0xcfba9599, 0xb8bda50f, |
| 71 | 0x2802b89e, 0x5f058808, 0xc60cd9b2, 0xb10be924, |
| 72 | 0x2f6f7c87, 0x58684c11, 0xc1611dab, 0xb6662d3d, |
| 73 | 0x76dc4190, 0x01db7106, 0x98d220bc, 0xefd5102a, |
| 74 | 0x71b18589, 0x06b6b51f, 0x9fbfe4a5, 0xe8b8d433, |
| 75 | 0x7807c9a2, 0x0f00f934, 0x9609a88e, 0xe10e9818, |
| 76 | 0x7f6a0dbb, 0x086d3d2d, 0x91646c97, 0xe6635c01, |
| 77 | 0x6b6b51f4, 0x1c6c6162, 0x856530d8, 0xf262004e, |
| 78 | 0x6c0695ed, 0x1b01a57b, 0x8208f4c1, 0xf50fc457, |
| 79 | 0x65b0d9c6, 0x12b7e950, 0x8bbeb8ea, 0xfcb9887c, |
| 80 | 0x62dd1ddf, 0x15da2d49, 0x8cd37cf3, 0xfbd44c65, |
| 81 | 0x4db26158, 0x3ab551ce, 0xa3bc0074, 0xd4bb30e2, |
| 82 | 0x4adfa541, 0x3dd895d7, 0xa4d1c46d, 0xd3d6f4fb, |
| 83 | 0x4369e96a, 0x346ed9fc, 0xad678846, 0xda60b8d0, |
| 84 | 0x44042d73, 0x33031de5, 0xaa0a4c5f, 0xdd0d7cc9, |
| 85 | 0x5005713c, 0x270241aa, 0xbe0b1010, 0xc90c2086, |
| 86 | 0x5768b525, 0x206f85b3, 0xb966d409, 0xce61e49f, |
| 87 | 0x5edef90e, 0x29d9c998, 0xb0d09822, 0xc7d7a8b4, |
| 88 | 0x59b33d17, 0x2eb40d81, 0xb7bd5c3b, 0xc0ba6cad, |
| 89 | 0xedb88320, 0x9abfb3b6, 0x03b6e20c, 0x74b1d29a, |
| 90 | 0xead54739, 0x9dd277af, 0x04db2615, 0x73dc1683, |
| 91 | 0xe3630b12, 0x94643b84, 0x0d6d6a3e, 0x7a6a5aa8, |
| 92 | 0xe40ecf0b, 0x9309ff9d, 0x0a00ae27, 0x7d079eb1, |
| 93 | 0xf00f9344, 0x8708a3d2, 0x1e01f268, 0x6906c2fe, |
| 94 | 0xf762575d, 0x806567cb, 0x196c3671, 0x6e6b06e7, |
| 95 | 0xfed41b76, 0x89d32be0, 0x10da7a5a, 0x67dd4acc, |
| 96 | 0xf9b9df6f, 0x8ebeeff9, 0x17b7be43, 0x60b08ed5, |
| 97 | 0xd6d6a3e8, 0xa1d1937e, 0x38d8c2c4, 0x4fdff252, |
| 98 | 0xd1bb67f1, 0xa6bc5767, 0x3fb506dd, 0x48b2364b, |
| 99 | 0xd80d2bda, 0xaf0a1b4c, 0x36034af6, 0x41047a60, |
| 100 | 0xdf60efc3, 0xa867df55, 0x316e8eef, 0x4669be79, |
| 101 | 0xcb61b38c, 0xbc66831a, 0x256fd2a0, 0x5268e236, |
| 102 | 0xcc0c7795, 0xbb0b4703, 0x220216b9, 0x5505262f, |
| 103 | 0xc5ba3bbe, 0xb2bd0b28, 0x2bb45a92, 0x5cb36a04, |
| 104 | 0xc2d7ffa7, 0xb5d0cf31, 0x2cd99e8b, 0x5bdeae1d, |
| 105 | 0x9b64c2b0, 0xec63f226, 0x756aa39c, 0x026d930a, |
| 106 | 0x9c0906a9, 0xeb0e363f, 0x72076785, 0x05005713, |
| 107 | 0x95bf4a82, 0xe2b87a14, 0x7bb12bae, 0x0cb61b38, |
| 108 | 0x92d28e9b, 0xe5d5be0d, 0x7cdcefb7, 0x0bdbdf21, |
| 109 | 0x86d3d2d4, 0xf1d4e242, 0x68ddb3f8, 0x1fda836e, |
| 110 | 0x81be16cd, 0xf6b9265b, 0x6fb077e1, 0x18b74777, |
| 111 | 0x88085ae6, 0xff0f6a70, 0x66063bca, 0x11010b5c, |
| 112 | 0x8f659eff, 0xf862ae69, 0x616bffd3, 0x166ccf45, |
| 113 | 0xa00ae278, 0xd70dd2ee, 0x4e048354, 0x3903b3c2, |
| 114 | 0xa7672661, 0xd06016f7, 0x4969474d, 0x3e6e77db, |
| 115 | 0xaed16a4a, 0xd9d65adc, 0x40df0b66, 0x37d83bf0, |
| 116 | 0xa9bcae53, 0xdebb9ec5, 0x47b2cf7f, 0x30b5ffe9, |
| 117 | 0xbdbdf21c, 0xcabac28a, 0x53b39330, 0x24b4a3a6, |
| 118 | 0xbad03605, 0xcdd70693, 0x54de5729, 0x23d967bf, |
| 119 | 0xb3667a2e, 0xc4614ab8, 0x5d681b02, 0x2a6f2b94, |
| 120 | 0xb40bbe37, 0xc30c8ea1, 0x5a05df1b, 0x2d02ef8d, |
| 121 | 0 |
| 122 | }; |
| 123 | |
| 124 | static u32 __init crc32(u8 * buf, u32 len) |
| 125 | { |
| 126 | register int i; |
| 127 | u32 sum; |
| 128 | register u32 s0; |
| 129 | s0 = ~0; |
| 130 | for (i = 0; i < len; i++) { |
| 131 | s0 = (s0 >> 8) ^ crctab[(u8) (s0 & 0xFF) ^ buf[i]]; |
| 132 | } |
| 133 | sum = ~s0; |
| 134 | return sum; |
| 135 | } |
| 136 | |
| 137 | static int __init fixup_ar525w_header(struct mtd_info *master, struct image_header *header) |
| 138 | { |
| 139 | char *buffer; |
| 140 | int res; |
| 141 | u32 bufferlength = header->kernelsz + sizeof(struct image_header); |
| 142 | u32 len; |
| 143 | char crcbuf[0x400]; |
| 144 | |
| 145 | printk(KERN_INFO "Fixing up AR525W header, old image size: %u, new image size: %u\n", |
| 146 | header->imagesz, bufferlength); |
| 147 | |
| 148 | buffer = vmalloc(bufferlength); |
| 149 | if (!buffer) { |
| 150 | printk(KERN_ERR "Can't allocate %u bytes\n", bufferlength); |
| 151 | return -ENOMEM; |
| 152 | } |
| 153 | |
| 154 | res = master->read(master, 0x0, bufferlength, &len, buffer); |
| 155 | if (res || len != bufferlength) |
| 156 | goto out; |
| 157 | |
| 158 | header = (struct image_header *) buffer; |
| 159 | header->imagesz = bufferlength; |
| 160 | header->checksum = 0; |
| 161 | header->fastcksum = 0; |
| 162 | |
| 163 | memcpy(crcbuf, buffer, 0x100); |
| 164 | memcpy(crcbuf + 0x100, buffer + (bufferlength >> 1) - ((bufferlength & 0x6) >> 1), 0x100); |
| 165 | memcpy(crcbuf + 0x200, buffer + bufferlength - 0x200, 0x200); |
| 166 | |
| 167 | header->fastcksum = crc32(crcbuf, sizeof(crcbuf)); |
| 168 | header->checksum = crc32(buffer, bufferlength); |
| 169 | |
| 170 | if (master->unlock) |
| 171 | master->unlock(master, 0, master->erasesize); |
| 172 | res = erase_write (master, 0, master->erasesize, buffer); |
| 173 | if (res) |
| 174 | printk(KERN_ERR "Can't rewrite image header\n"); |
| 175 | |
| 176 | out: |
| 177 | vfree(buffer); |
| 178 | return res; |
| 179 | } |
| 180 | |
| 181 | static int __init parse_ar525w_partitions(struct mtd_info *master, struct mtd_partition **pparts, unsigned long plat_data) |
| 182 | { |
| 183 | struct image_header header; |
| 184 | int res; |
| 185 | size_t len; |
| 186 | struct mtd_partition *rdc_flash_parts; |
| 187 | struct rdc_platform_data *pdata = (struct rdc_platform_data *) plat_data; |
| 188 | |
| 189 | if (master->size != 0x400000) //4MB |
| 190 | return -ENOSYS; |
| 191 | |
| 192 | res = master->read(master, 0x0, sizeof(header), &len, (char *)&header); |
| 193 | if (res) |
| 194 | return res; |
| 195 | |
| 196 | if (strncmp(header.magic, "GMTK", 4)) |
| 197 | return -ENOSYS; |
| 198 | |
| 199 | if (header.kernelsz > 0x400000 || header.kernelsz < master->erasesize) { |
| 200 | printk(KERN_ERR "AR525W image header found, but seems corrupt, kernel size %u\n", header.kernelsz); |
| 201 | return -EINVAL; |
| 202 | } |
| 203 | |
| 204 | if (header.kernelsz + sizeof(header) != header.imagesz) { |
| 205 | res = fixup_ar525w_header(master, &header); |
| 206 | if (res) |
| 207 | return res; |
| 208 | } |
| 209 | |
| 210 | rdc_flash_parts = kzalloc(sizeof(struct mtd_partition) * 3, GFP_KERNEL); |
| 211 | |
| 212 | rdc_flash_parts[0].name = "firmware"; |
| 213 | rdc_flash_parts[0].offset = 0x0; |
| 214 | rdc_flash_parts[0].size = 0x3E0000; |
| 215 | rdc_flash_parts[1].name = "rootfs"; |
| 216 | rdc_flash_parts[1].offset = header.kernelsz + sizeof(header); |
| 217 | rdc_flash_parts[1].size = rdc_flash_parts[0].size - rdc_flash_parts[1].offset; |
| 218 | rdc_flash_parts[2].name = "bootloader"; |
| 219 | rdc_flash_parts[2].offset = 0x3E0000; |
| 220 | rdc_flash_parts[2].size = 0x20000; |
| 221 | |
| 222 | *pparts = rdc_flash_parts; |
| 223 | |
| 224 | pdata->led_data.num_leds = ARRAY_SIZE(ar525w_leds); |
| 225 | pdata->led_data.leds = ar525w_leds; |
| 226 | pdata->button_data.nbuttons = ARRAY_SIZE(ar525w_btns); |
| 227 | pdata->button_data.buttons = ar525w_btns; |
| 228 | |
| 229 | return 3; |
| 230 | } |
| 231 | |
| 232 | static struct mtd_part_parser __initdata ar525w_parser = { |
| 233 | .owner = THIS_MODULE, |
| 234 | .parse_fn = parse_ar525w_partitions, |
| 235 | .name = "AR525W", |
| 236 | }; |
| 237 | |
| 238 | static int __init ar525w_setup(void) |
| 239 | { |
| 240 | return register_mtd_parser(&ar525w_parser); |
| 241 | } |
| 242 | |
| 243 | arch_initcall(ar525w_setup); |
| 244 | |
