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/*
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* Copyright © 2009 Christian Daniel <cd@maintech.de> |
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* |
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* This program is free software; you can redistribute it and/or modify |
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* it under the terms of the GNU General Public License as published by |
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* the Free Software Foundation; either version 2 of the License, or |
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* (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 Free Software |
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* Foundation, Inc., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301 USA |
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* |
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* TRX flash partition table. |
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* Based on ar7 map by Felix Fietkau <nbd@openwrt.org> |
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* |
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*/ |
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#include <linux/kernel.h> |
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#include <linux/slab.h> |
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#include <linux/mtd/mtd.h> |
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#include <linux/mtd/partitions.h> |
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#include <linux/bootmem.h> |
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#include <linux/magic.h> |
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#define TRX_PARTS 6 |
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#define TRX_MAGIC 0x30524448 |
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#define TRX_MAX_OFFSET 3 |
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struct trx_header { |
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uint32_t magic; /* "HDR0" */ |
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uint32_t len; /* Length of file including header */ |
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uint32_t crc32; /* 32-bit CRC from flag_version to end of file */ |
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uint32_t flag_version; /* 0:15 flags, 16:31 version */ |
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uint32_t offsets[TRX_MAX_OFFSET]; /* Offsets of partitions from start of header */ |
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}; |
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#define IH_MAGIC 0x27051956 /* Image Magic Number */ |
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#define IH_NMLEN 32 /* Image Name Length */ |
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struct uimage_header { |
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uint32_t ih_magic; /* Image Header Magic Number */ |
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uint32_t ih_hcrc; /* Image Header CRC Checksum */ |
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uint32_t ih_time; /* Image Creation Timestamp */ |
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uint32_t ih_size; /* Image Data Size */ |
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uint32_t ih_load; /* Data» Load Address */ |
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uint32_t ih_ep; /* Entry Point Address */ |
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uint32_t ih_dcrc; /* Image Data CRC Checksum */ |
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uint8_t ih_os; /* Operating System */ |
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uint8_t ih_arch; /* CPU architecture */ |
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uint8_t ih_type; /* Image Type */ |
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uint8_t ih_comp; /* Compression Type */ |
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uint8_t ih_name[IH_NMLEN]; /* Image Name */ |
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}; |
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static struct mtd_partition trx_parts[TRX_PARTS]; |
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static int create_mtd_partitions(struct mtd_info *master, |
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struct mtd_partition **pparts, |
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unsigned long origin) |
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{ |
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uint8_t buf[512]; |
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int len; |
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struct trx_header* header; |
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struct uimage_header* uheader; |
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unsigned int kernel_len; |
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master->read(master, 4 * master->erasesize, sizeof(buf), &len, buf); |
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if(strncmp(buf, "NL16", 4) == 0) { |
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printk(KERN_INFO "TRX on WRT160NL detected\n"); |
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header = (struct trx_header*)(buf + 32); |
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if(le32_to_cpu(header->magic) != TRX_MAGIC) { |
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printk(KERN_WARNING "TRX messed up\n"); |
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return 0; |
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} |
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uheader = (struct uimage_header*)(buf + 60); |
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if(uheader->ih_magic != IH_MAGIC) { |
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printk(KERN_WARNING "uImage messed up\n"); |
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return 0; |
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} |
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kernel_len = uheader->ih_size / master->erasesize; |
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if(uheader->ih_size % master->erasesize) |
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kernel_len++; |
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kernel_len++; |
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kernel_len *= master->erasesize; |
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trx_parts[0].name = "u-boot"; |
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trx_parts[0].offset = 0; |
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trx_parts[0].size = 4 * master->erasesize; |
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trx_parts[0].mask_flags = MTD_WRITEABLE; |
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trx_parts[1].name = "kernel"; |
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trx_parts[1].offset = trx_parts[0].offset + trx_parts[0].size; |
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trx_parts[1].size = kernel_len; |
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trx_parts[1].mask_flags = 0; |
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trx_parts[2].name = "rootfs"; |
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trx_parts[2].offset = trx_parts[1].offset + trx_parts[1].size; |
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trx_parts[2].size = master->size - 6 * master->erasesize - trx_parts[1].size; |
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trx_parts[2].mask_flags = 0; |
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trx_parts[3].name = "nvram"; |
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trx_parts[3].offset = master->size - 2 * master->erasesize; |
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trx_parts[3].size = master->erasesize; |
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trx_parts[3].mask_flags = 0; |
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trx_parts[4].name = "ART"; |
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trx_parts[4].offset = master->size - master->erasesize; |
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trx_parts[4].size = master->erasesize; |
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trx_parts[4].mask_flags = MTD_WRITEABLE; |
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trx_parts[5].name = "firmware"; |
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trx_parts[5].offset = 4 * master->erasesize; |
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trx_parts[5].size = master->size - 6 * master->erasesize; |
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trx_parts[5].mask_flags = 0; |
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*pparts = trx_parts; |
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return TRX_PARTS; |
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} else { |
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return 0; |
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} |
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} |
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static struct mtd_part_parser trx_parser = { |
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.owner = THIS_MODULE, |
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.parse_fn = create_mtd_partitions, |
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.name = "wrt160nl", |
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}; |
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static int __init trx_parser_init(void) |
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{ |
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return register_mtd_parser(&trx_parser); |
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} |
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module_init(trx_parser_init); |
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MODULE_LICENSE("GPL"); |
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MODULE_AUTHOR("Christian Daniel <cd@maintech.de>"); |
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