diff options
| -rw-r--r-- | target/linux/generic/files/drivers/mtd/mtdsplit/mtdsplit_bcm_wfi.c | 148 |
1 files changed, 148 insertions, 0 deletions
diff --git a/target/linux/generic/files/drivers/mtd/mtdsplit/mtdsplit_bcm_wfi.c b/target/linux/generic/files/drivers/mtd/mtdsplit/mtdsplit_bcm_wfi.c index f99685c8e6..7eb6526f9e 100644 --- a/target/linux/generic/files/drivers/mtd/mtdsplit/mtdsplit_bcm_wfi.c +++ b/target/linux/generic/files/drivers/mtd/mtdsplit/mtdsplit_bcm_wfi.c @@ -24,6 +24,8 @@ #include "mtdsplit.h" +#define char_to_num(c) ((c >= '0' && c <= '9') ? (c - '0') : (0)) + #define BCM_WFI_PARTS 3 #define CFERAM_NAME "cferam" @@ -35,6 +37,11 @@ #define UBI_MAGIC 0x55424923 +#define SERCOMM_MAGIC_PFX "eRcOmM." +#define SERCOMM_MAGIC_PFX_LEN (sizeof(SERCOMM_MAGIC_PFX) - 1) +#define SERCOMM_MAGIC "eRcOmM.000" +#define SERCOMM_MAGIC_LEN (sizeof(SERCOMM_MAGIC) - 1) + static u32 jffs2_dirent_crc(struct jffs2_raw_dirent *node) { return crc32(0, node, sizeof(struct jffs2_raw_dirent) - 8); @@ -220,9 +227,150 @@ static struct mtd_part_parser mtdsplit_bcm_wfi_parser = { .type = MTD_PARSER_TYPE_FIRMWARE, }; +static int sercomm_bootflag_value(struct mtd_info *mtd, uint8_t *buf) +{ + size_t retlen; + loff_t offs; + int rc; + + for (offs = 0; offs < mtd->size; offs += mtd->erasesize) { + rc = mtd_read(mtd, offs, SERCOMM_MAGIC_LEN, &retlen, buf); + if (rc || retlen != SERCOMM_MAGIC_LEN) + continue; + + if (memcmp(buf, SERCOMM_MAGIC_PFX, SERCOMM_MAGIC_PFX_LEN)) + continue; + + rc = char_to_num(buf[SERCOMM_MAGIC_PFX_LEN + 0]) * 100; + rc += char_to_num(buf[SERCOMM_MAGIC_PFX_LEN + 1]) * 10; + rc += char_to_num(buf[SERCOMM_MAGIC_PFX_LEN + 2]) * 1; + + return rc; + } + + return -ENOENT; +} + +static int mtdsplit_parse_ser_wfi(struct mtd_info *master, + const struct mtd_partition **pparts, + struct mtd_part_parser_data *data) +{ + struct mtd_info *mtd_bf1, *mtd_bf2; + struct erase_info bf_erase; + struct mtd_partition *parts; + loff_t kernel_off, rootfs_off, img_size; + loff_t img2_off, img2_size = 0; + unsigned int num_parts = BCM_WFI_PARTS, cur_part = 0; + uint8_t *buf; + int bf1, bf2; + int ret; + + mtd_bf1 = get_mtd_device_nm("bootflag1"); + if (IS_ERR(mtd_bf1)) + return -ENOENT; + + mtd_bf2 = get_mtd_device_nm("bootflag2"); + if (IS_ERR(mtd_bf2)) + return -ENOENT; + + buf = kzalloc(master->erasesize, GFP_KERNEL); + if (!buf) + return -ENOMEM; + + bf1 = sercomm_bootflag_value(mtd_bf1, buf); + if (bf1 >= 0) + printk("sercomm: bootflag1=%d\n", bf1); + + bf2 = sercomm_bootflag_value(mtd_bf2, buf); + if (bf2 >= 0) + printk("sercomm: bootflag2=%d\n", bf2); + + if (bf1 == bf2 && bf2 >= 0) { + bf2 = -ENOENT; + bf_erase.addr = 0; + bf_erase.len = mtd_bf2->size; + mtd_erase(mtd_bf2, &bf_erase); + } + + if (bf1 >= bf2) { + kernel_off = 0; + if (bf2 >= 0) { + img_size = master->size / 2; + + img2_off = img_size; + img2_size = master->size - img2_off; + num_parts++; + } else { + img_size = master->size; + } + } else { + kernel_off = master->size / 2; + img_size = master->size; + + img2_off = 0; + img2_size = kernel_off; + num_parts++; + } + + ret = jffs2_find_file(master, buf, KERNEL_NAME, KERNEL_NAME_LEN, + &kernel_off, img_size); + kfree(buf); + if (ret) + return ret; + + rootfs_off = kernel_off + master->erasesize; + ret = ubifs_find(master, &rootfs_off, img_size); + if (ret) + return ret; + + parts = kzalloc(num_parts * sizeof(*parts), GFP_KERNEL); + if (!parts) + return -ENOMEM; + + parts[cur_part].name = "firmware"; + parts[cur_part].offset = kernel_off; + parts[cur_part].size = img_size - kernel_off; + cur_part++; + + parts[cur_part].name = KERNEL_PART_NAME; + parts[cur_part].offset = kernel_off; + parts[cur_part].size = rootfs_off - kernel_off; + cur_part++; + + parts[cur_part].name = UBI_PART_NAME; + parts[cur_part].offset = rootfs_off; + parts[cur_part].size = img_size - rootfs_off; + cur_part++; + + if (img2_size) { + parts[cur_part].name = "img2"; + parts[cur_part].offset = img2_off; + parts[cur_part].size = img2_size; + cur_part++; + } + + *pparts = parts; + + return num_parts; +} + +static const struct of_device_id mtdsplit_ser_wfi_of_match[] = { + { .compatible = "sercomm,wfi" }, + { }, +}; + +static struct mtd_part_parser mtdsplit_ser_wfi_parser = { + .owner = THIS_MODULE, + .name = "ser-wfi-fw", + .of_match_table = mtdsplit_ser_wfi_of_match, + .parse_fn = mtdsplit_parse_ser_wfi, + .type = MTD_PARSER_TYPE_FIRMWARE, +}; + static int __init mtdsplit_bcm_wfi_init(void) { register_mtd_parser(&mtdsplit_bcm_wfi_parser); + register_mtd_parser(&mtdsplit_ser_wfi_parser); return 0; } |