/* * ar525w RDC321x platform devices * * Copyright (C) 2007-2009 OpenWrt.org * Copyright (C) 2007 Florian Fainelli * Copyright (C) 2008-2009 Daniel Gimpelevich * * This program is free software; you can redistribute it and/or * modify it under the terms of the GNU General Public License * as published by the Free Software Foundation; either version 2 * of the License, or (at your option) any later version. * * This program is distributed in the hope that it will be useful, * but WITHOUT ANY WARRANTY; without even the implied warranty of * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the * GNU General Public License for more details. * * You should have received a copy of the GNU General Public License * along with this program; if not, write to the * Free Software Foundation, Inc., 51 Franklin Street, Fifth Floor, * Boston, MA 02110-1301, USA. * */ #include #include #include #include #include #include struct image_header { char magic[4]; /* ASICII: GMTK */ u32 checksum; /* CRC32 */ u32 version; /* x.x.x.x */ u32 kernelsz; /* The size of the kernel image */ u32 imagesz; /* The length of this image file ( kernel + romfs + this header) */ u32 pid; /* Product ID */ u32 fastcksum; /* Partial CRC32 on (First(256), medium(256), last(512)) */ u32 reserved; }; static struct gpio_led ar525w_leds[] = { { .name = "rdc321x:dmz", .gpio = 1, .active_low = 1}, }; static struct gpio_button ar525w_btns[] = { { .gpio = 6, .code = BTN_0, .desc = "Reset", .active_low = 1, } }; static u32 __initdata crctab[257] = { 0x00000000, 0x77073096, 0xee0e612c, 0x990951ba, 0x076dc419, 0x706af48f, 0xe963a535, 0x9e6495a3, 0x0edb8832, 0x79dcb8a4, 0xe0d5e91e, 0x97d2d988, 0x09b64c2b, 0x7eb17cbd, 0xe7b82d07, 0x90bf1d91, 0x1db71064, 0x6ab020f2, 0xf3b97148, 0x84be41de, 0x1adad47d, 0x6ddde4eb, 0xf4d4b551, 0x83d385c7, 0x136c9856, 0x646ba8c0, 0xfd62f97a, 0x8a65c9ec, 0x14015c4f, 0x63066cd9, 0xfa0f3d63, 0x8d080df5, 0x3b6e20c8, 0x4c69105e, 0xd56041e4, 0xa2677172, 0x3c03e4d1, 0x4b04d447, 0xd20d85fd, 0xa50ab56b, 0x35b5a8fa, 0x42b2986c, 0xdbbbc9d6, 0xacbcf940, 0x32d86ce3, 0x45df5c75, 0xdcd60dcf, 0xabd13d59, 0x26d930ac, 0x51de003a, 0xc8d75180, 0xbfd06116, 0x21b4f4b5, 0x56b3c423, 0xcfba9599, 0xb8bda50f, 0x2802b89e, 0x5f058808, 0xc60cd9b2, 0xb10be924, 0x2f6f7c87, 0x58684c11, 0xc1611dab, 0xb6662d3d, 0x76dc4190, 0x01db7106, 0x98d220bc, 0xefd5102a, 0x71b18589, 0x06b6b51f, 0x9fbfe4a5, 0xe8b8d433, 0x7807c9a2, 0x0f00f934, 0x9609a88e, 0xe10e9818, 0x7f6a0dbb, 0x086d3d2d, 0x91646c97, 0xe6635c01, 0x6b6b51f4, 0x1c6c6162, 0x856530d8, 0xf262004e, 0x6c0695ed, 0x1b01a57b, 0x8208f4c1, 0xf50fc457, 0x65b0d9c6, 0x12b7e950, 0x8bbeb8ea, 0xfcb9887c, 0x62dd1ddf, 0x15da2d49, 0x8cd37cf3, 0xfbd44c65, 0x4db26158, 0x3ab551ce, 0xa3bc0074, 0xd4bb30e2, 0x4adfa541, 0x3dd895d7, 0xa4d1c46d, 0xd3d6f4fb, 0x4369e96a, 0x346ed9fc, 0xad678846, 0xda60b8d0, 0x44042d73, 0x33031de5, 0xaa0a4c5f, 0xdd0d7cc9, 0x5005713c, 0x270241aa, 0xbe0b1010, 0xc90c2086, 0x5768b525, 0x206f85b3, 0xb966d409, 0xce61e49f, 0x5edef90e, 0x29d9c998, 0xb0d09822, 0xc7d7a8b4, 0x59b33d17, 0x2eb40d81, 0xb7bd5c3b, 0xc0ba6cad, 0xedb88320, 0x9abfb3b6, 0x03b6e20c, 0x74b1d29a, 0xead54739, 0x9dd277af, 0x04db2615, 0x73dc1683, 0xe3630b12, 0x94643b84, 0x0d6d6a3e, 0x7a6a5aa8, 0xe40ecf0b, 0x9309ff9d, 0x0a00ae27, 0x7d079eb1, 0xf00f9344, 0x8708a3d2, 0x1e01f268, 0x6906c2fe, 0xf762575d, 0x806567cb, 0x196c3671, 0x6e6b06e7, 0xfed41b76, 0x89d32be0, 0x10da7a5a, 0x67dd4acc, 0xf9b9df6f, 0x8ebeeff9, 0x17b7be43, 0x60b08ed5, 0xd6d6a3e8, 0xa1d1937e, 0x38d8c2c4, 0x4fdff252, 0xd1bb67f1, 0xa6bc5767, 0x3fb506dd, 0x48b2364b, 0xd80d2bda, 0xaf0a1b4c, 0x36034af6, 0x41047a60, 0xdf60efc3, 0xa867df55, 0x316e8eef, 0x4669be79, 0xcb61b38c, 0xbc66831a, 0x256fd2a0, 0x5268e236, 0xcc0c7795, 0xbb0b4703, 0x220216b9, 0x5505262f, 0xc5ba3bbe, 0xb2bd0b28, 0x2bb45a92, 0x5cb36a04, 0xc2d7ffa7, 0xb5d0cf31, 0x2cd99e8b, 0x5bdeae1d, 0x9b64c2b0, 0xec63f226, 0x756aa39c, 0x026d930a, 0x9c0906a9, 0xeb0e363f, 0x72076785, 0x05005713, 0x95bf4a82, 0xe2b87a14, 0x7bb12bae, 0x0cb61b38, 0x92d28e9b, 0xe5d5be0d, 0x7cdcefb7, 0x0bdbdf21, 0x86d3d2d4, 0xf1d4e242, 0x68ddb3f8, 0x1fda836e, 0x81be16cd, 0xf6b9265b, 0x6fb077e1, 0x18b74777, 0x88085ae6, 0xff0f6a70, 0x66063bca, 0x11010b5c, 0x8f659eff, 0xf862ae69, 0x616bffd3, 0x166ccf45, 0xa00ae278, 0xd70dd2ee, 0x4e048354, 0x3903b3c2, 0xa7672661, 0xd06016f7, 0x4969474d, 0x3e6e77db, 0xaed16a4a, 0xd9d65adc, 0x40df0b66, 0x37d83bf0, 0xa9bcae53, 0xdebb9ec5, 0x47b2cf7f, 0x30b5ffe9, 0xbdbdf21c, 0xcabac28a, 0x53b39330, 0x24b4a3a6, 0xbad03605, 0xcdd70693, 0x54de5729, 0x23d967bf, 0xb3667a2e, 0xc4614ab8, 0x5d681b02, 0x2a6f2b94, 0xb40bbe37, 0xc30c8ea1, 0x5a05df1b, 0x2d02ef8d, 0 }; static u32 __init crc32(u8 * buf, u32 len) { register int i; u32 sum; register u32 s0; s0 = ~0; for (i = 0; i < len; i++) { s0 = (s0 >> 8) ^ crctab[(u8) (s0 & 0xFF) ^ buf[i]]; } sum = ~s0; return sum; } static int __init fixup_ar525w_header(struct mtd_info *master, struct image_header *header) { char *buffer; int res; u32 bufferlength = header->kernelsz + sizeof(struct image_header); u32 len; char crcbuf[0x400]; printk(KERN_INFO "Fixing up AR525W header, old image size: %u, new image size: %u\n", header->imagesz, bufferlength); buffer = vmalloc(bufferlength); if (!buffer) { printk(KERN_ERR "Can't allocate %u bytes\n", bufferlength); return -ENOMEM; } res = master->read(master, 0x0, bufferlength, &len, buffer); if (res || len != bufferlength) goto out; header = (struct image_header *) buffer; header->imagesz = bufferlength; header->checksum = 0; header->fastcksum = 0; memcpy(crcbuf, buffer, 0x100); memcpy(crcbuf + 0x100, buffer + (bufferlength >> 1) - ((bufferlength & 0x6) >> 1), 0x100); memcpy(crcbuf + 0x200, buffer + bufferlength - 0x200, 0x200); header->fastcksum = crc32(crcbuf, sizeof(crcbuf)); header->checksum = crc32(buffer, bufferlength); if (master->unlock) master->unlock(master, 0, master->erasesize); res = erase_write (master, 0, master->erasesize, buffer); if (res) printk(KERN_ERR "Can't rewrite image header\n"); out: vfree(buffer); return res; } static int __init parse_ar525w_partitions(struct mtd_info *master, struct mtd_partition **pparts, unsigned long plat_data) { struct image_header header; int res; size_t len; struct mtd_partition *rdc_flash_parts; struct rdc_platform_data *pdata = (struct rdc_platform_data *) plat_data; if (master->size != 0x400000) //4MB return -ENOSYS; res = master->read(master, 0x0, sizeof(header), &len, (char *)&header); if (res) return res; if (strncmp(header.magic, "GMTK", 4)) return -ENOSYS; if (header.kernelsz > 0x400000 || header.kernelsz < master->erasesize) { printk(KERN_ERR "AR525W image header found, but seems corrupt, kernel size %u\n", header.kernelsz); return -EINVAL; } if (header.kernelsz + sizeof(header) != header.imagesz) { res = fixup_ar525w_header(master, &header); if (res) return res; } rdc_flash_parts = kzalloc(sizeof(struct mtd_partition) * 3, GFP_KERNEL); rdc_flash_parts[0].name = "firmware"; rdc_flash_parts[0].offset = 0x0; rdc_flash_parts[0].size = 0x3E0000; rdc_flash_parts[1].name = "rootfs"; rdc_flash_parts[1].offset = header.kernelsz + sizeof(header); rdc_flash_parts[1].size = rdc_flash_parts[0].size - rdc_flash_parts[1].offset; rdc_flash_parts[2].name = "bootloader"; rdc_flash_parts[2].offset = 0x3E0000; rdc_flash_parts[2].size = 0x20000; *pparts = rdc_flash_parts; pdata->led_data.num_leds = ARRAY_SIZE(ar525w_leds); pdata->led_data.leds = ar525w_leds; pdata->button_data.nbuttons = ARRAY_SIZE(ar525w_btns); pdata->button_data.buttons = ar525w_btns; return 3; } static struct mtd_part_parser __initdata ar525w_parser = { .owner = THIS_MODULE, .parse_fn = parse_ar525w_partitions, .name = "AR525W", }; static int __init ar525w_setup(void) { return register_mtd_parser(&ar525w_parser); } arch_initcall(ar525w_setup);