diff options
| -rw-r--r-- | target/linux/generic/config-5.10 | 1 | ||||
| -rw-r--r-- | target/linux/generic/config-5.4 | 1 | ||||
| -rw-r--r-- | target/linux/generic/files/drivers/mtd/mtdsplit/Kconfig | 5 | ||||
| -rw-r--r-- | target/linux/generic/files/drivers/mtd/mtdsplit/Makefile | 1 | ||||
| -rw-r--r-- | target/linux/generic/files/drivers/mtd/mtdsplit/mtdsplit_bcm63xx.c | 186 |
5 files changed, 194 insertions, 0 deletions
diff --git a/target/linux/generic/config-5.10 b/target/linux/generic/config-5.10 index 7148ce7912..395e1098b5 100644 --- a/target/linux/generic/config-5.10 +++ b/target/linux/generic/config-5.10 @@ -3525,6 +3525,7 @@ CONFIG_MTD_ROOTFS_ROOT_DEV=y # CONFIG_MTD_SPI_NOR_USE_4K_SECTORS is not set CONFIG_MTD_SPI_NOR_USE_4K_SECTORS_LIMIT=4096 CONFIG_MTD_SPLIT=y +# CONFIG_MTD_SPLIT_BCM63XX_FW is not set # CONFIG_MTD_SPLIT_BCM_WFI_FW is not set # CONFIG_MTD_SPLIT_BRNIMAGE_FW is not set # CONFIG_MTD_SPLIT_ELF_FW is not set diff --git a/target/linux/generic/config-5.4 b/target/linux/generic/config-5.4 index 02794847a4..9929688a61 100644 --- a/target/linux/generic/config-5.4 +++ b/target/linux/generic/config-5.4 @@ -3249,6 +3249,7 @@ CONFIG_MTD_ROOTFS_ROOT_DEV=y # CONFIG_MTD_SPI_NOR_USE_4K_SECTORS is not set CONFIG_MTD_SPI_NOR_USE_4K_SECTORS_LIMIT=4096 CONFIG_MTD_SPLIT=y +# CONFIG_MTD_SPLIT_BCM63XX_FW is not set # CONFIG_MTD_SPLIT_BCM_WFI_FW is not set # CONFIG_MTD_SPLIT_BRNIMAGE_FW is not set # CONFIG_MTD_SPLIT_ELF_FW is not set diff --git a/target/linux/generic/files/drivers/mtd/mtdsplit/Kconfig b/target/linux/generic/files/drivers/mtd/mtdsplit/Kconfig index 4832b8d9e4..794a39f2c3 100644 --- a/target/linux/generic/files/drivers/mtd/mtdsplit/Kconfig +++ b/target/linux/generic/files/drivers/mtd/mtdsplit/Kconfig @@ -20,6 +20,11 @@ config MTD_SPLIT_SQUASHFS_ROOT comment "Firmware partition parsers" +config MTD_SPLIT_BCM63XX_FW + bool "BCM63xx firmware parser" + depends on MTD_SPLIT_SUPPORT + select MTD_SPLIT + config MTD_SPLIT_BCM_WFI_FW bool "Broadcom Whole Flash Image parser" depends on MTD_SPLIT_SUPPORT diff --git a/target/linux/generic/files/drivers/mtd/mtdsplit/Makefile b/target/linux/generic/files/drivers/mtd/mtdsplit/Makefile index 9217d8f64f..1461099b7c 100644 --- a/target/linux/generic/files/drivers/mtd/mtdsplit/Makefile +++ b/target/linux/generic/files/drivers/mtd/mtdsplit/Makefile @@ -1,4 +1,5 @@ obj-$(CONFIG_MTD_SPLIT) += mtdsplit.o +obj-$(CONFIG_MTD_SPLIT_BCM63XX_FW) += mtdsplit_bcm63xx.o obj-$(CONFIG_MTD_SPLIT_BCM_WFI_FW) += mtdsplit_bcm_wfi.o obj-$(CONFIG_MTD_SPLIT_CFE_BOOTFS) += mtdsplit_cfe_bootfs.o obj-$(CONFIG_MTD_SPLIT_SEAMA_FW) += mtdsplit_seama.o diff --git a/target/linux/generic/files/drivers/mtd/mtdsplit/mtdsplit_bcm63xx.c b/target/linux/generic/files/drivers/mtd/mtdsplit/mtdsplit_bcm63xx.c new file mode 100644 index 0000000000..3a4b8a754f --- /dev/null +++ b/target/linux/generic/files/drivers/mtd/mtdsplit/mtdsplit_bcm63xx.c @@ -0,0 +1,186 @@ +/* + * Firmware MTD split for BCM63XX, based on bcm63xxpart.c + * + * Copyright (C) 2006-2008 Florian Fainelli <florian@openwrt.org> + * Copyright (C) 2006-2008 Mike Albon <malbon@openwrt.org> + * Copyright (C) 2009-2010 Daniel Dickinson <openwrt@cshore.neomailbox.net> + * Copyright (C) 2011-2013 Jonas Gorski <jonas.gorski@gmail.com> + * Copyright (C) 2015 Simon Arlott <simon@fire.lp0.eu> + * Copyright (C) 2017 Álvaro Fernández Rojas <noltari@gmail.com> + * + * This program is free software; you can redistribute it and/or modify it + * under the terms of the GNU General Public License version 2 as published + * by the Free Software Foundation. + * + */ + +#define pr_fmt(fmt) KBUILD_MODNAME ": " fmt + +#include <linux/bcm963xx_tag.h> +#include <linux/crc32.h> +#include <linux/init.h> +#include <linux/kernel.h> +#include <linux/module.h> +#include <linux/slab.h> +#include <linux/byteorder/generic.h> +#include <linux/mtd/mtd.h> +#include <linux/mtd/partitions.h> + +#include "mtdsplit.h" + +/* Ensure strings read from flash structs are null terminated */ +#define STR_NULL_TERMINATE(x) \ + do { char *_str = (x); _str[sizeof(x) - 1] = 0; } while (0) + +#define BCM63XX_NR_PARTS 2 + +static int bcm63xx_read_image_tag(struct mtd_info *master, loff_t offset, + struct bcm_tag *hdr) +{ + int ret; + size_t retlen; + u32 computed_crc; + + ret = mtd_read(master, offset, sizeof(*hdr), &retlen, (void *) hdr); + if (ret) + return ret; + + if (retlen != sizeof(*hdr)) + return -EIO; + + computed_crc = crc32_le(IMAGETAG_CRC_START, (u8 *)hdr, + offsetof(struct bcm_tag, header_crc)); + if (computed_crc == hdr->header_crc) { + STR_NULL_TERMINATE(hdr->board_id); + STR_NULL_TERMINATE(hdr->tag_version); + + pr_info("CFE image tag found at 0x%llx with version %s, " + "board type %s\n", offset, hdr->tag_version, + hdr->board_id); + + return 0; + } else { + pr_err("CFE image tag at 0x%llx CRC invalid " + "(expected %08x, actual %08x)\n", + offset, hdr->header_crc, computed_crc); + + return 1; + } +} + +static int bcm63xx_parse_partitions(struct mtd_info *master, + const struct mtd_partition **pparts, + struct bcm_tag *hdr) +{ + struct mtd_partition *parts; + unsigned int flash_image_start; + unsigned int kernel_address; + unsigned int kernel_length; + size_t kernel_offset = 0, kernel_size = 0; + size_t rootfs_offset = 0, rootfs_size = 0; + int kernel_part, rootfs_part; + + STR_NULL_TERMINATE(hdr->flash_image_start); + if (kstrtouint(hdr->flash_image_start, 10, &flash_image_start) || + flash_image_start < BCM963XX_EXTENDED_SIZE) { + pr_err("invalid rootfs address: %*ph\n", + (int) sizeof(hdr->flash_image_start), + hdr->flash_image_start); + return -EINVAL; + } + + STR_NULL_TERMINATE(hdr->kernel_address); + if (kstrtouint(hdr->kernel_address, 10, &kernel_address) || + kernel_address < BCM963XX_EXTENDED_SIZE) { + pr_err("invalid kernel address: %*ph\n", + (int) sizeof(hdr->kernel_address), hdr->kernel_address); + return -EINVAL; + } + + STR_NULL_TERMINATE(hdr->kernel_length); + if (kstrtouint(hdr->kernel_length, 10, &kernel_length) || + !kernel_length) { + pr_err("invalid kernel length: %*ph\n", + (int) sizeof(hdr->kernel_length), hdr->kernel_length); + return -EINVAL; + } + + kernel_offset = kernel_address - BCM963XX_EXTENDED_SIZE - + mtdpart_get_offset(master); + kernel_size = kernel_length; + + if (flash_image_start < kernel_address) { + /* rootfs first */ + rootfs_part = 0; + kernel_part = 1; + rootfs_offset = flash_image_start - BCM963XX_EXTENDED_SIZE - + mtdpart_get_offset(master); + rootfs_size = kernel_offset - rootfs_offset; + } else { + /* kernel first */ + kernel_part = 0; + rootfs_part = 1; + rootfs_offset = kernel_offset + kernel_size; + rootfs_size = master->size - rootfs_offset; + } + + if (mtd_check_rootfs_magic(master, rootfs_offset, NULL)) + pr_warn("rootfs magic not found\n"); + + parts = kzalloc(BCM63XX_NR_PARTS * sizeof(*parts), GFP_KERNEL); + if (!parts) + return -ENOMEM; + + parts[kernel_part].name = KERNEL_PART_NAME; + parts[kernel_part].offset = kernel_offset; + parts[kernel_part].size = kernel_size; + + parts[rootfs_part].name = ROOTFS_PART_NAME; + parts[rootfs_part].offset = rootfs_offset; + parts[rootfs_part].size = rootfs_size; + + *pparts = parts; + return BCM63XX_NR_PARTS; +} + +static int mtdsplit_parse_bcm63xx(struct mtd_info *master, + const struct mtd_partition **pparts, + struct mtd_part_parser_data *data) +{ + struct bcm_tag hdr; + loff_t offset; + + if (mtd_type_is_nand(master)) + return -EINVAL; + + /* find bcm63xx_cfe image on erase block boundaries */ + for (offset = 0; offset < master->size; offset += master->erasesize) { + if (!bcm63xx_read_image_tag(master, offset, (void *) &hdr)) + return bcm63xx_parse_partitions(master, pparts, + (void *) &hdr); + } + + return -EINVAL; +} + +static const struct of_device_id mtdsplit_fit_of_match_table[] = { + { .compatible = "brcm,bcm963xx-imagetag" }, + { }, +}; + +static struct mtd_part_parser mtdsplit_bcm63xx_parser = { + .owner = THIS_MODULE, + .name = "bcm63xx-fw", + .of_match_table = mtdsplit_fit_of_match_table, + .parse_fn = mtdsplit_parse_bcm63xx, + .type = MTD_PARSER_TYPE_FIRMWARE, +}; + +static int __init mtdsplit_bcm63xx_init(void) +{ + register_mtd_parser(&mtdsplit_bcm63xx_parser); + + return 0; +} + +module_init(mtdsplit_bcm63xx_init); |