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Diffstat (limited to 'drivers/mtd/bcm63xxpart.c')
-rw-r--r--drivers/mtd/bcm63xxpart.c325
1 files changed, 0 insertions, 325 deletions
diff --git a/drivers/mtd/bcm63xxpart.c b/drivers/mtd/bcm63xxpart.c
deleted file mode 100644
index 41d1d3149c61..000000000000
--- a/drivers/mtd/bcm63xxpart.c
+++ /dev/null
@@ -1,325 +0,0 @@
-/*
- * BCM63XX CFE image tag parser
- *
- * Copyright © 2006-2008 Florian Fainelli <florian@openwrt.org>
- * Mike Albon <malbon@openwrt.org>
- * Copyright © 2009-2010 Daniel Dickinson <openwrt@cshore.neomailbox.net>
- * Copyright © 2011-2013 Jonas Gorski <jonas.gorski@gmail.com>
- *
- * 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
- *
- */
-
-#define pr_fmt(fmt) KBUILD_MODNAME ": " fmt
-
-#include <linux/bcm963xx_nvram.h>
-#include <linux/bcm963xx_tag.h>
-#include <linux/crc32.h>
-#include <linux/module.h>
-#include <linux/kernel.h>
-#include <linux/sizes.h>
-#include <linux/slab.h>
-#include <linux/vmalloc.h>
-#include <linux/mtd/mtd.h>
-#include <linux/mtd/partitions.h>
-
-#define BCM963XX_CFE_BLOCK_SIZE SZ_64K /* always at least 64KiB */
-
-#define BCM963XX_CFE_MAGIC_OFFSET 0x4e0
-#define BCM963XX_CFE_VERSION_OFFSET 0x570
-#define BCM963XX_NVRAM_OFFSET 0x580
-
-/* 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)
-
-static int bcm63xx_detect_cfe(struct mtd_info *master)
-{
- char buf[9];
- int ret;
- size_t retlen;
-
- ret = mtd_read(master, BCM963XX_CFE_VERSION_OFFSET, 5, &retlen,
- (void *)buf);
- buf[retlen] = 0;
-
- if (ret)
- return ret;
-
- if (strncmp("cfe-v", buf, 5) == 0)
- return 0;
-
- /* very old CFE's do not have the cfe-v string, so check for magic */
- ret = mtd_read(master, BCM963XX_CFE_MAGIC_OFFSET, 8, &retlen,
- (void *)buf);
- buf[retlen] = 0;
-
- return strncmp("CFE1CFE1", buf, 8);
-}
-
-static int bcm63xx_read_nvram(struct mtd_info *master,
- struct bcm963xx_nvram *nvram)
-{
- u32 actual_crc, expected_crc;
- size_t retlen;
- int ret;
-
- /* extract nvram data */
- ret = mtd_read(master, BCM963XX_NVRAM_OFFSET, BCM963XX_NVRAM_V5_SIZE,
- &retlen, (void *)nvram);
- if (ret)
- return ret;
-
- ret = bcm963xx_nvram_checksum(nvram, &expected_crc, &actual_crc);
- if (ret)
- pr_warn("nvram checksum failed, contents may be invalid (expected %08x, got %08x)\n",
- expected_crc, actual_crc);
-
- if (!nvram->psi_size)
- nvram->psi_size = BCM963XX_DEFAULT_PSI_SIZE;
-
- return 0;
-}
-
-static int bcm63xx_read_image_tag(struct mtd_info *master, const char *name,
- loff_t tag_offset, struct bcm_tag *buf)
-{
- int ret;
- size_t retlen;
- u32 computed_crc;
-
- ret = mtd_read(master, tag_offset, sizeof(*buf), &retlen, (void *)buf);
- if (ret)
- return ret;
-
- if (retlen != sizeof(*buf))
- return -EIO;
-
- computed_crc = crc32_le(IMAGETAG_CRC_START, (u8 *)buf,
- offsetof(struct bcm_tag, header_crc));
- if (computed_crc == buf->header_crc) {
- STR_NULL_TERMINATE(buf->board_id);
- STR_NULL_TERMINATE(buf->tag_version);
-
- pr_info("%s: CFE image tag found at 0x%llx with version %s, board type %s\n",
- name, tag_offset, buf->tag_version, buf->board_id);
-
- return 0;
- }
-
- pr_warn("%s: CFE image tag at 0x%llx CRC invalid (expected %08x, actual %08x)\n",
- name, tag_offset, buf->header_crc, computed_crc);
- return 1;
-}
-
-static int bcm63xx_parse_cfe_nor_partitions(struct mtd_info *master,
- const struct mtd_partition **pparts, struct bcm963xx_nvram *nvram)
-{
- /* CFE, NVRAM and global Linux are always present */
- int nrparts = 3, curpart = 0;
- struct bcm_tag *buf = NULL;
- struct mtd_partition *parts;
- int ret;
- unsigned int rootfsaddr, kerneladdr, spareaddr;
- unsigned int rootfslen, kernellen, sparelen, totallen;
- unsigned int cfelen, nvramlen;
- unsigned int cfe_erasesize;
- int i;
- bool rootfs_first = false;
-
- cfe_erasesize = max_t(uint32_t, master->erasesize,
- BCM963XX_CFE_BLOCK_SIZE);
-
- cfelen = cfe_erasesize;
- nvramlen = nvram->psi_size * SZ_1K;
- nvramlen = roundup(nvramlen, cfe_erasesize);
-
- buf = vmalloc(sizeof(struct bcm_tag));
- if (!buf)
- return -ENOMEM;
-
- /* Get the tag */
- ret = bcm63xx_read_image_tag(master, "rootfs", cfelen, buf);
- if (!ret) {
- STR_NULL_TERMINATE(buf->flash_image_start);
- if (kstrtouint(buf->flash_image_start, 10, &rootfsaddr) ||
- rootfsaddr < BCM963XX_EXTENDED_SIZE) {
- pr_err("invalid rootfs address: %*ph\n",
- (int)sizeof(buf->flash_image_start),
- buf->flash_image_start);
- goto invalid_tag;
- }
-
- STR_NULL_TERMINATE(buf->kernel_address);
- if (kstrtouint(buf->kernel_address, 10, &kerneladdr) ||
- kerneladdr < BCM963XX_EXTENDED_SIZE) {
- pr_err("invalid kernel address: %*ph\n",
- (int)sizeof(buf->kernel_address),
- buf->kernel_address);
- goto invalid_tag;
- }
-
- STR_NULL_TERMINATE(buf->kernel_length);
- if (kstrtouint(buf->kernel_length, 10, &kernellen)) {
- pr_err("invalid kernel length: %*ph\n",
- (int)sizeof(buf->kernel_length),
- buf->kernel_length);
- goto invalid_tag;
- }
-
- STR_NULL_TERMINATE(buf->total_length);
- if (kstrtouint(buf->total_length, 10, &totallen)) {
- pr_err("invalid total length: %*ph\n",
- (int)sizeof(buf->total_length),
- buf->total_length);
- goto invalid_tag;
- }
-
- kerneladdr = kerneladdr - BCM963XX_EXTENDED_SIZE;
- rootfsaddr = rootfsaddr - BCM963XX_EXTENDED_SIZE;
- spareaddr = roundup(totallen, master->erasesize) + cfelen;
-
- if (rootfsaddr < kerneladdr) {
- /* default Broadcom layout */
- rootfslen = kerneladdr - rootfsaddr;
- rootfs_first = true;
- } else {
- /* OpenWrt layout */
- rootfsaddr = kerneladdr + kernellen;
- rootfslen = spareaddr - rootfsaddr;
- }
- } else if (ret > 0) {
-invalid_tag:
- kernellen = 0;
- rootfslen = 0;
- rootfsaddr = 0;
- spareaddr = cfelen;
- } else {
- goto out;
- }
- sparelen = master->size - spareaddr - nvramlen;
-
- /* Determine number of partitions */
- if (rootfslen > 0)
- nrparts++;
-
- if (kernellen > 0)
- nrparts++;
-
- parts = kzalloc(sizeof(*parts) * nrparts + 10 * nrparts, GFP_KERNEL);
- if (!parts) {
- ret = -ENOMEM;
- goto out;
- }
-
- /* Start building partition list */
- parts[curpart].name = "CFE";
- parts[curpart].offset = 0;
- parts[curpart].size = cfelen;
- curpart++;
-
- if (kernellen > 0) {
- int kernelpart = curpart;
-
- if (rootfslen > 0 && rootfs_first)
- kernelpart++;
- parts[kernelpart].name = "kernel";
- parts[kernelpart].offset = kerneladdr;
- parts[kernelpart].size = kernellen;
- curpart++;
- }
-
- if (rootfslen > 0) {
- int rootfspart = curpart;
-
- if (kernellen > 0 && rootfs_first)
- rootfspart--;
- parts[rootfspart].name = "rootfs";
- parts[rootfspart].offset = rootfsaddr;
- parts[rootfspart].size = rootfslen;
- if (sparelen > 0 && !rootfs_first)
- parts[rootfspart].size += sparelen;
- curpart++;
- }
-
- parts[curpart].name = "nvram";
- parts[curpart].offset = master->size - nvramlen;
- parts[curpart].size = nvramlen;
- curpart++;
-
- /* Global partition "linux" to make easy firmware upgrade */
- parts[curpart].name = "linux";
- parts[curpart].offset = cfelen;
- parts[curpart].size = master->size - cfelen - nvramlen;
-
- for (i = 0; i < nrparts; i++)
- pr_info("Partition %d is %s offset %llx and length %llx\n", i,
- parts[i].name, parts[i].offset, parts[i].size);
-
- pr_info("Spare partition is offset %x and length %x\n", spareaddr,
- sparelen);
-
- *pparts = parts;
- ret = 0;
-
-out:
- vfree(buf);
-
- if (ret)
- return ret;
-
- return nrparts;
-}
-
-static int bcm63xx_parse_cfe_partitions(struct mtd_info *master,
- const struct mtd_partition **pparts,
- struct mtd_part_parser_data *data)
-{
- struct bcm963xx_nvram *nvram = NULL;
- int ret;
-
- if (bcm63xx_detect_cfe(master))
- return -EINVAL;
-
- nvram = vzalloc(sizeof(*nvram));
- if (!nvram)
- return -ENOMEM;
-
- ret = bcm63xx_read_nvram(master, nvram);
- if (ret)
- goto out;
-
- if (!mtd_type_is_nand(master))
- ret = bcm63xx_parse_cfe_nor_partitions(master, pparts, nvram);
- else
- ret = -EINVAL;
-
-out:
- vfree(nvram);
- return ret;
-};
-
-static struct mtd_part_parser bcm63xx_cfe_parser = {
- .parse_fn = bcm63xx_parse_cfe_partitions,
- .name = "bcm63xxpart",
-};
-module_mtd_part_parser(bcm63xx_cfe_parser);
-
-MODULE_LICENSE("GPL");
-MODULE_AUTHOR("Daniel Dickinson <openwrt@cshore.neomailbox.net>");
-MODULE_AUTHOR("Florian Fainelli <florian@openwrt.org>");
-MODULE_AUTHOR("Mike Albon <malbon@openwrt.org>");
-MODULE_AUTHOR("Jonas Gorski <jonas.gorski@gmail.com");
-MODULE_DESCRIPTION("MTD partitioning for BCM63XX CFE bootloaders");
generated by cgit (git 2.34.1) at 2025-12-25 09:48:06 +0000