diff options
Diffstat (limited to 'target/linux/ar71xx/files/drivers/mtd')
| -rw-r--r-- | target/linux/ar71xx/files/drivers/mtd/wrt160nl_part.c | 149 |
1 files changed, 149 insertions, 0 deletions
diff --git a/target/linux/ar71xx/files/drivers/mtd/wrt160nl_part.c b/target/linux/ar71xx/files/drivers/mtd/wrt160nl_part.c new file mode 100644 index 000000000..f31d56ce2 --- /dev/null +++ b/target/linux/ar71xx/files/drivers/mtd/wrt160nl_part.c @@ -0,0 +1,149 @@ +/* + * Copyright © 2009 Christian Daniel <cd@maintech.de> + * + * 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 St, Fifth Floor, Boston, MA 02110-1301 USA + * + * TRX flash partition table. + * Based on ar7 map by Felix Fietkau <nbd@openwrt.org> + * + */ + +#include <linux/kernel.h> +#include <linux/slab.h> + +#include <linux/mtd/mtd.h> +#include <linux/mtd/partitions.h> +#include <linux/bootmem.h> +#include <linux/magic.h> + +#define TRX_PARTS 6 +#define TRX_MAGIC 0x30524448 +#define TRX_MAX_OFFSET 3 + +struct trx_header { + uint32_t magic; /* "HDR0" */ + uint32_t len; /* Length of file including header */ + uint32_t crc32; /* 32-bit CRC from flag_version to end of file */ + uint32_t flag_version; /* 0:15 flags, 16:31 version */ + uint32_t offsets[TRX_MAX_OFFSET]; /* Offsets of partitions from start of header */ +}; + +#define IH_MAGIC 0x27051956 /* Image Magic Number */ +#define IH_NMLEN 32 /* Image Name Length */ + +struct uimage_header { + uint32_t ih_magic; /* Image Header Magic Number */ + uint32_t ih_hcrc; /* Image Header CRC Checksum */ + uint32_t ih_time; /* Image Creation Timestamp */ + uint32_t ih_size; /* Image Data Size */ + uint32_t ih_load; /* Data» Load Address */ + uint32_t ih_ep; /* Entry Point Address */ + uint32_t ih_dcrc; /* Image Data CRC Checksum */ + uint8_t ih_os; /* Operating System */ + uint8_t ih_arch; /* CPU architecture */ + uint8_t ih_type; /* Image Type */ + uint8_t ih_comp; /* Compression Type */ + uint8_t ih_name[IH_NMLEN]; /* Image Name */ +}; + +static struct mtd_partition trx_parts[TRX_PARTS]; + +static int create_mtd_partitions(struct mtd_info *master, + struct mtd_partition **pparts, + unsigned long origin) +{ + uint8_t buf[512]; + int len; + struct trx_header* header; + struct uimage_header* uheader; + unsigned int kernel_len; + + master->read(master, 4 * master->erasesize, sizeof(buf), &len, buf); + if(strncmp(buf, "NL16", 4) == 0) { + printk(KERN_INFO "TRX on WRT160NL detected\n"); + + header = (struct trx_header*)(buf + 32); + + if(le32_to_cpu(header->magic) != TRX_MAGIC) { + printk(KERN_WARNING "TRX messed up\n"); + return 0; + } + + uheader = (struct uimage_header*)(buf + 60); + + if(uheader->ih_magic != IH_MAGIC) { + printk(KERN_WARNING "uImage messed up\n"); + return 0; + } + + kernel_len = uheader->ih_size / master->erasesize; + if(uheader->ih_size % master->erasesize) + kernel_len++; + kernel_len++; + kernel_len *= master->erasesize; + + trx_parts[0].name = "u-boot"; + trx_parts[0].offset = 0; + trx_parts[0].size = 4 * master->erasesize; + trx_parts[0].mask_flags = MTD_WRITEABLE; + + trx_parts[1].name = "kernel"; + trx_parts[1].offset = trx_parts[0].offset + trx_parts[0].size; + trx_parts[1].size = kernel_len; + trx_parts[1].mask_flags = 0; + + trx_parts[2].name = "rootfs"; + trx_parts[2].offset = trx_parts[1].offset + trx_parts[1].size; + trx_parts[2].size = master->size - 6 * master->erasesize - trx_parts[1].size; + trx_parts[2].mask_flags = 0; + + trx_parts[3].name = "nvram"; + trx_parts[3].offset = master->size - 2 * master->erasesize; + trx_parts[3].size = master->erasesize; + trx_parts[3].mask_flags = 0; + + trx_parts[4].name = "ART"; + trx_parts[4].offset = master->size - master->erasesize; + trx_parts[4].size = master->erasesize; + trx_parts[4].mask_flags = MTD_WRITEABLE; + + trx_parts[5].name = "firmware"; + trx_parts[5].offset = 4 * master->erasesize; + trx_parts[5].size = master->size - 6 * master->erasesize; + trx_parts[5].mask_flags = 0; + + *pparts = trx_parts; + + return TRX_PARTS; + } else { + return 0; + } +} + +static struct mtd_part_parser trx_parser = { + .owner = THIS_MODULE, + .parse_fn = create_mtd_partitions, + .name = "wrt160nl", +}; + +static int __init trx_parser_init(void) +{ + return register_mtd_parser(&trx_parser); +} + +module_init(trx_parser_init); + +MODULE_LICENSE("GPL"); +MODULE_AUTHOR("Christian Daniel <cd@maintech.de>"); |