diff options
Diffstat (limited to 'target/linux/ath79/files/drivers/mtd/parsers/parser_cybertan.c')
| -rw-r--r-- | target/linux/ath79/files/drivers/mtd/parsers/parser_cybertan.c | 163 |
1 files changed, 163 insertions, 0 deletions
diff --git a/target/linux/ath79/files/drivers/mtd/parsers/parser_cybertan.c b/target/linux/ath79/files/drivers/mtd/parsers/parser_cybertan.c new file mode 100644 index 0000000000..7b67e31b05 --- /dev/null +++ b/target/linux/ath79/files/drivers/mtd/parsers/parser_cybertan.c @@ -0,0 +1,163 @@ +/* + * Copyright (C) 2009 Christian Daniel <cd@maintech.de> + * Copyright (C) 2009 Gabor Juhos <juhosg@openwrt.org> + * + * 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@nbd.name> + * + */ + +#include <linux/kernel.h> +#include <linux/module.h> +#include <linux/slab.h> +#include <linux/vmalloc.h> + +#include <linux/mtd/mtd.h> +#include <linux/mtd/partitions.h> +#include <linux/version.h> + +struct cybertan_header { + char magic[4]; + u8 res1[4]; + char fw_date[3]; + char fw_ver[3]; + char id[4]; + char hw_ver; + char unused; + u8 flags[2]; + u8 res2[10]; +} __packed; + +#define TRX_PARTS 3 +#define TRX_MAGIC 0x30524448 +#define TRX_MAX_OFFSET 3 + +struct trx_header { + __le32 magic; /* "HDR0" */ + __le32 len; /* Length of file including header */ + __le32 crc32; /* 32-bit CRC from flag_version to end of file */ + __le32 flag_version; /* 0:15 flags, 16:31 version */ + __le32 offsets[TRX_MAX_OFFSET]; /* Offsets of partitions from start of header */ +} __packed; + +#define IH_MAGIC 0x27051956 /* Image Magic Number */ +#define IH_NMLEN 32 /* Image Name Length */ + +struct uimage_header { + __be32 ih_magic; /* Image Header Magic Number */ + __be32 ih_hcrc; /* Image Header CRC Checksum */ + __be32 ih_time; /* Image Creation Timestamp */ + __be32 ih_size; /* Image Data Size */ + __be32 ih_load; /* Data» Load Address */ + __be32 ih_ep; /* Entry Point Address */ + __be32 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 */ +} __packed; + +struct firmware_header { + struct cybertan_header cybertan; + struct trx_header trx; + struct uimage_header uimage; +} __packed; + +static int cybertan_parse_partitions(struct mtd_info *master, + const struct mtd_partition **pparts, + struct mtd_part_parser_data *data) +{ + struct firmware_header header; + struct trx_header *theader; + struct uimage_header *uheader; + struct mtd_partition *trx_parts; + size_t retlen; + unsigned int kernel_len; + int ret; + + trx_parts = kcalloc(TRX_PARTS, sizeof(struct mtd_partition), + GFP_KERNEL); + if (!trx_parts) { + ret = -ENOMEM; + goto out; + } + + ret = mtd_read(master, 0, sizeof(header), + &retlen, (uint8_t *)&header); + if (ret) + goto free_parts; + + if (retlen != sizeof(header)) { + ret = -EIO; + goto free_parts; + } + + theader = &header.trx; + if (theader->magic != cpu_to_le32(TRX_MAGIC)) { + printk(KERN_NOTICE "%s: no TRX header found\n", master->name); + goto free_parts; + } + + uheader = &header.uimage; + if (uheader->ih_magic != cpu_to_be32(IH_MAGIC)) { + printk(KERN_NOTICE "%s: no uImage found\n", master->name); + goto free_parts; + } + + kernel_len = le32_to_cpu(theader->offsets[1]) + + sizeof(struct cybertan_header); + + trx_parts[0].name = "header"; + trx_parts[0].offset = 0; + trx_parts[0].size = offsetof(struct firmware_header, uimage); + trx_parts[0].mask_flags = 0; + + 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[0].size; + 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 - trx_parts[1].size - trx_parts[0].size; + trx_parts[2].mask_flags = 0; + + *pparts = trx_parts; + return TRX_PARTS; + +free_parts: + kfree(trx_parts); +out: + return ret; +} + +static const struct of_device_id mtd_parser_cybertan_of_match_table[] = { + { .compatible = "cybertan,trx" }, + {}, +}; +MODULE_DEVICE_TABLE(of, mtd_parser_cybertan_of_match_table); + +static struct mtd_part_parser mtd_parser_cybertan = { + .parse_fn = cybertan_parse_partitions, + .name = "cybertan-trx", + .of_match_table = mtd_parser_cybertan_of_match_table, +}; +module_mtd_part_parser(mtd_parser_cybertan); + +MODULE_LICENSE("GPL"); +MODULE_AUTHOR("Christian Daniel <cd@maintech.de>"); |