mirror of https://github.com/hak5/openwrt.git
244 lines
8.1 KiB
C
244 lines
8.1 KiB
C
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/*
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* ar525w RDC321x platform devices
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*
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* Copyright (C) 2007-2009 OpenWrt.org
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* Copyright (C) 2007 Florian Fainelli <florian@openwrt.org>
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* Copyright (C) 2008-2009 Daniel Gimpelevich <daniel@gimpelevich.san-francisco.ca.us>
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*
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* This program is free software; you can redistribute it and/or
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* modify it under the terms of the GNU General Public License
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* as published by the Free Software Foundation; either version 2
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* of the License, or (at your option) any later version.
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*
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* This program is distributed in the hope that it will be useful,
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* but WITHOUT ANY WARRANTY; without even the implied warranty of
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* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
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* GNU General Public License for more details.
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*
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* You should have received a copy of the GNU General Public License
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* along with this program; if not, write to the
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* Free Software Foundation, Inc., 51 Franklin Street, Fifth Floor,
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* Boston, MA 02110-1301, USA.
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*
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*/
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#include <linux/init.h>
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#include <linux/mtd/physmap.h>
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#include <linux/input.h>
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#include <linux/vmalloc.h>
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#include <linux/mtd/mtd.h>
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#include <asm/rdc_boards.h>
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struct image_header {
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char magic[4]; /* ASICII: GMTK */
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u32 checksum; /* CRC32 */
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u32 version; /* x.x.x.x */
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u32 kernelsz; /* The size of the kernel image */
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u32 imagesz; /* The length of this image file ( kernel + romfs + this header) */
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u32 pid; /* Product ID */
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u32 fastcksum; /* Partial CRC32 on (First(256), medium(256), last(512)) */
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u32 reserved;
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};
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static struct gpio_led ar525w_leds[] = {
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{ .name = "rdc321x:dmz", .gpio = 1, .active_low = 1},
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};
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static struct gpio_button ar525w_btns[] = {
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{
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.gpio = 6,
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.code = BTN_0,
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.desc = "Reset",
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.active_low = 1,
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}
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};
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static u32 __initdata crctab[257] = {
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0x00000000, 0x77073096, 0xee0e612c, 0x990951ba,
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0x076dc419, 0x706af48f, 0xe963a535, 0x9e6495a3,
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0x0edb8832, 0x79dcb8a4, 0xe0d5e91e, 0x97d2d988,
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0x09b64c2b, 0x7eb17cbd, 0xe7b82d07, 0x90bf1d91,
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0x1db71064, 0x6ab020f2, 0xf3b97148, 0x84be41de,
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0x1adad47d, 0x6ddde4eb, 0xf4d4b551, 0x83d385c7,
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0x136c9856, 0x646ba8c0, 0xfd62f97a, 0x8a65c9ec,
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0x14015c4f, 0x63066cd9, 0xfa0f3d63, 0x8d080df5,
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0x3b6e20c8, 0x4c69105e, 0xd56041e4, 0xa2677172,
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0x3c03e4d1, 0x4b04d447, 0xd20d85fd, 0xa50ab56b,
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0x35b5a8fa, 0x42b2986c, 0xdbbbc9d6, 0xacbcf940,
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0x32d86ce3, 0x45df5c75, 0xdcd60dcf, 0xabd13d59,
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0x26d930ac, 0x51de003a, 0xc8d75180, 0xbfd06116,
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0x21b4f4b5, 0x56b3c423, 0xcfba9599, 0xb8bda50f,
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0x2802b89e, 0x5f058808, 0xc60cd9b2, 0xb10be924,
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0x2f6f7c87, 0x58684c11, 0xc1611dab, 0xb6662d3d,
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0x76dc4190, 0x01db7106, 0x98d220bc, 0xefd5102a,
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0x71b18589, 0x06b6b51f, 0x9fbfe4a5, 0xe8b8d433,
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0x7807c9a2, 0x0f00f934, 0x9609a88e, 0xe10e9818,
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0x7f6a0dbb, 0x086d3d2d, 0x91646c97, 0xe6635c01,
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0x6b6b51f4, 0x1c6c6162, 0x856530d8, 0xf262004e,
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0x6c0695ed, 0x1b01a57b, 0x8208f4c1, 0xf50fc457,
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0x65b0d9c6, 0x12b7e950, 0x8bbeb8ea, 0xfcb9887c,
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0x62dd1ddf, 0x15da2d49, 0x8cd37cf3, 0xfbd44c65,
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0x4db26158, 0x3ab551ce, 0xa3bc0074, 0xd4bb30e2,
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0x4adfa541, 0x3dd895d7, 0xa4d1c46d, 0xd3d6f4fb,
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0x4369e96a, 0x346ed9fc, 0xad678846, 0xda60b8d0,
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0x44042d73, 0x33031de5, 0xaa0a4c5f, 0xdd0d7cc9,
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0x5005713c, 0x270241aa, 0xbe0b1010, 0xc90c2086,
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0x5768b525, 0x206f85b3, 0xb966d409, 0xce61e49f,
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0x5edef90e, 0x29d9c998, 0xb0d09822, 0xc7d7a8b4,
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0x59b33d17, 0x2eb40d81, 0xb7bd5c3b, 0xc0ba6cad,
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0xedb88320, 0x9abfb3b6, 0x03b6e20c, 0x74b1d29a,
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0xead54739, 0x9dd277af, 0x04db2615, 0x73dc1683,
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0xe3630b12, 0x94643b84, 0x0d6d6a3e, 0x7a6a5aa8,
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0xe40ecf0b, 0x9309ff9d, 0x0a00ae27, 0x7d079eb1,
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0xf00f9344, 0x8708a3d2, 0x1e01f268, 0x6906c2fe,
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0xf762575d, 0x806567cb, 0x196c3671, 0x6e6b06e7,
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0xfed41b76, 0x89d32be0, 0x10da7a5a, 0x67dd4acc,
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0xf9b9df6f, 0x8ebeeff9, 0x17b7be43, 0x60b08ed5,
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0xd6d6a3e8, 0xa1d1937e, 0x38d8c2c4, 0x4fdff252,
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0xd1bb67f1, 0xa6bc5767, 0x3fb506dd, 0x48b2364b,
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0xd80d2bda, 0xaf0a1b4c, 0x36034af6, 0x41047a60,
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0xdf60efc3, 0xa867df55, 0x316e8eef, 0x4669be79,
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0xcb61b38c, 0xbc66831a, 0x256fd2a0, 0x5268e236,
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0xcc0c7795, 0xbb0b4703, 0x220216b9, 0x5505262f,
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0xc5ba3bbe, 0xb2bd0b28, 0x2bb45a92, 0x5cb36a04,
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0xc2d7ffa7, 0xb5d0cf31, 0x2cd99e8b, 0x5bdeae1d,
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0x9b64c2b0, 0xec63f226, 0x756aa39c, 0x026d930a,
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0x9c0906a9, 0xeb0e363f, 0x72076785, 0x05005713,
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0x95bf4a82, 0xe2b87a14, 0x7bb12bae, 0x0cb61b38,
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0x92d28e9b, 0xe5d5be0d, 0x7cdcefb7, 0x0bdbdf21,
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0x86d3d2d4, 0xf1d4e242, 0x68ddb3f8, 0x1fda836e,
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0x81be16cd, 0xf6b9265b, 0x6fb077e1, 0x18b74777,
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0x88085ae6, 0xff0f6a70, 0x66063bca, 0x11010b5c,
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0x8f659eff, 0xf862ae69, 0x616bffd3, 0x166ccf45,
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0xa00ae278, 0xd70dd2ee, 0x4e048354, 0x3903b3c2,
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0xa7672661, 0xd06016f7, 0x4969474d, 0x3e6e77db,
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0xaed16a4a, 0xd9d65adc, 0x40df0b66, 0x37d83bf0,
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0xa9bcae53, 0xdebb9ec5, 0x47b2cf7f, 0x30b5ffe9,
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0xbdbdf21c, 0xcabac28a, 0x53b39330, 0x24b4a3a6,
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0xbad03605, 0xcdd70693, 0x54de5729, 0x23d967bf,
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0xb3667a2e, 0xc4614ab8, 0x5d681b02, 0x2a6f2b94,
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0xb40bbe37, 0xc30c8ea1, 0x5a05df1b, 0x2d02ef8d,
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0
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};
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static u32 __init crc32(u8 * buf, u32 len)
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{
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register int i;
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u32 sum;
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register u32 s0;
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s0 = ~0;
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for (i = 0; i < len; i++) {
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s0 = (s0 >> 8) ^ crctab[(u8) (s0 & 0xFF) ^ buf[i]];
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}
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sum = ~s0;
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return sum;
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}
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static int __init fixup_ar525w_header(struct mtd_info *master, struct image_header *header)
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{
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char *buffer;
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int res;
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u32 bufferlength = header->kernelsz + sizeof(struct image_header);
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u32 len;
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char crcbuf[0x400];
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printk(KERN_INFO "Fixing up AR525W header, old image size: %u, new image size: %u\n",
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header->imagesz, bufferlength);
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buffer = vmalloc(bufferlength);
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if (!buffer) {
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printk(KERN_ERR "Can't allocate %u bytes\n", bufferlength);
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return -ENOMEM;
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}
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res = master->read(master, 0x0, bufferlength, &len, buffer);
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if (res || len != bufferlength)
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goto out;
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header = (struct image_header *) buffer;
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header->imagesz = bufferlength;
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header->checksum = 0;
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header->fastcksum = 0;
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memcpy(crcbuf, buffer, 0x100);
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memcpy(crcbuf + 0x100, buffer + (bufferlength >> 1) - ((bufferlength & 0x6) >> 1), 0x100);
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memcpy(crcbuf + 0x200, buffer + bufferlength - 0x200, 0x200);
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header->fastcksum = crc32(crcbuf, sizeof(crcbuf));
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header->checksum = crc32(buffer, bufferlength);
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if (master->unlock)
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master->unlock(master, 0, master->erasesize);
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res = erase_write (master, 0, master->erasesize, buffer);
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if (res)
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printk(KERN_ERR "Can't rewrite image header\n");
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out:
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vfree(buffer);
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return res;
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}
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static int __init parse_ar525w_partitions(struct mtd_info *master, struct mtd_partition **pparts, unsigned long plat_data)
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{
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struct image_header header;
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int res;
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size_t len;
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struct mtd_partition *rdc_flash_parts;
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struct rdc_platform_data *pdata = (struct rdc_platform_data *) plat_data;
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if (master->size != 0x400000) //4MB
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return -ENOSYS;
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res = master->read(master, 0x0, sizeof(header), &len, (char *)&header);
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if (res)
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return res;
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if (strncmp(header.magic, "GMTK", 4))
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return -ENOSYS;
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if (header.kernelsz > 0x400000 || header.kernelsz < master->erasesize) {
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printk(KERN_ERR "AR525W image header found, but seems corrupt, kernel size %u\n", header.kernelsz);
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return -EINVAL;
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}
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if (header.kernelsz + sizeof(header) != header.imagesz) {
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res = fixup_ar525w_header(master, &header);
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if (res)
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return res;
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}
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rdc_flash_parts = kzalloc(sizeof(struct mtd_partition) * 3, GFP_KERNEL);
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rdc_flash_parts[0].name = "firmware";
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rdc_flash_parts[0].offset = 0x0;
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rdc_flash_parts[0].size = 0x3E0000;
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rdc_flash_parts[1].name = "rootfs";
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rdc_flash_parts[1].offset = header.kernelsz + sizeof(header);
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rdc_flash_parts[1].size = rdc_flash_parts[0].size - rdc_flash_parts[1].offset;
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rdc_flash_parts[2].name = "bootloader";
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rdc_flash_parts[2].offset = 0x3E0000;
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rdc_flash_parts[2].size = 0x20000;
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*pparts = rdc_flash_parts;
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pdata->led_data.num_leds = ARRAY_SIZE(ar525w_leds);
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pdata->led_data.leds = ar525w_leds;
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pdata->button_data.nbuttons = ARRAY_SIZE(ar525w_btns);
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pdata->button_data.buttons = ar525w_btns;
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return 3;
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}
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static struct mtd_part_parser __initdata ar525w_parser = {
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.owner = THIS_MODULE,
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.parse_fn = parse_ar525w_partitions,
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.name = "AR525W",
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};
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static int __init ar525w_setup(void)
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{
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return register_mtd_parser(&ar525w_parser);
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}
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arch_initcall(ar525w_setup);
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