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-rw-r--r--drivers/mtd/parsers/Kconfig27
-rw-r--r--drivers/mtd/parsers/Makefile2
-rw-r--r--drivers/mtd/parsers/afs.c410
-rw-r--r--drivers/mtd/parsers/parser_imagetag.c222
4 files changed, 661 insertions, 0 deletions
diff --git a/drivers/mtd/parsers/Kconfig b/drivers/mtd/parsers/Kconfig
index fccf1950e92d..bc201327dda0 100644
--- a/drivers/mtd/parsers/Kconfig
+++ b/drivers/mtd/parsers/Kconfig
@@ -1,3 +1,30 @@
+config MTD_PARSER_IMAGETAG
+ tristate "Parser for BCM963XX Image Tag format partitions"
+ depends on BCM63XX || BMIPS_GENERIC || COMPILE_TEST
+ select CRC32
+ help
+ Image Tag is the firmware header used by broadcom on their xDSL line
+ of devices. It is used to describe the offsets and lengths of kernel
+ and rootfs partitions.
+ This driver adds support for parsing a partition with an Image Tag
+ header and creates up to two partitions, kernel and rootfs.
+
+config MTD_AFS_PARTS
+ tristate "ARM Firmware Suite partition parsing"
+ depends on (ARM || ARM64)
+ help
+ The ARM Firmware Suite allows the user to divide flash devices into
+ multiple 'images'. Each such image has a header containing its name
+ and offset/size etc.
+
+ If you need code which can detect and parse these tables, and
+ register MTD 'partitions' corresponding to each image detected,
+ enable this option.
+
+ You will still need the parsing functions to be called by the driver
+ for your particular device. It won't happen automatically. The
+ 'physmap' map driver (CONFIG_MTD_PHYSMAP) does this, for example.
+
config MTD_PARSER_TRX
tristate "Parser for TRX format partitions"
depends on MTD && (BCM47XX || ARCH_BCM_5301X || COMPILE_TEST)
diff --git a/drivers/mtd/parsers/Makefile b/drivers/mtd/parsers/Makefile
index d8418bf6804a..cddc8f35a856 100644
--- a/drivers/mtd/parsers/Makefile
+++ b/drivers/mtd/parsers/Makefile
@@ -1,3 +1,5 @@
+obj-$(CONFIG_MTD_PARSER_IMAGETAG) += parser_imagetag.o
+obj-$(CONFIG_MTD_AFS_PARTS) += afs.o
obj-$(CONFIG_MTD_PARSER_TRX) += parser_trx.o
obj-$(CONFIG_MTD_SHARPSL_PARTS) += sharpslpart.o
obj-$(CONFIG_MTD_REDBOOT_PARTS) += redboot.o
diff --git a/drivers/mtd/parsers/afs.c b/drivers/mtd/parsers/afs.c
new file mode 100644
index 000000000000..0c730024f806
--- /dev/null
+++ b/drivers/mtd/parsers/afs.c
@@ -0,0 +1,410 @@
+/*======================================================================
+
+ drivers/mtd/afs.c: ARM Flash Layout/Partitioning
+
+ Copyright © 2000 ARM Limited
+ Copyright (C) 2019 Linus Walleij
+
+ 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., 59 Temple Place, Suite 330, Boston, MA 02111-1307 USA
+
+ This is access code for flashes using ARM's flash partitioning
+ standards.
+
+======================================================================*/
+
+#include <linux/module.h>
+#include <linux/types.h>
+#include <linux/kernel.h>
+#include <linux/slab.h>
+#include <linux/string.h>
+#include <linux/init.h>
+
+#include <linux/mtd/mtd.h>
+#include <linux/mtd/map.h>
+#include <linux/mtd/partitions.h>
+
+#define AFSV1_FOOTER_MAGIC 0xA0FFFF9F
+#define AFSV2_FOOTER_MAGIC1 0x464C5348 /* "FLSH" */
+#define AFSV2_FOOTER_MAGIC2 0x464F4F54 /* "FOOT" */
+
+struct footer_v1 {
+ u32 image_info_base; /* Address of first word of ImageFooter */
+ u32 image_start; /* Start of area reserved by this footer */
+ u32 signature; /* 'Magic' number proves it's a footer */
+ u32 type; /* Area type: ARM Image, SIB, customer */
+ u32 checksum; /* Just this structure */
+};
+
+struct image_info_v1 {
+ u32 bootFlags; /* Boot flags, compression etc. */
+ u32 imageNumber; /* Unique number, selects for boot etc. */
+ u32 loadAddress; /* Address program should be loaded to */
+ u32 length; /* Actual size of image */
+ u32 address; /* Image is executed from here */
+ char name[16]; /* Null terminated */
+ u32 headerBase; /* Flash Address of any stripped header */
+ u32 header_length; /* Length of header in memory */
+ u32 headerType; /* AIF, RLF, s-record etc. */
+ u32 checksum; /* Image checksum (inc. this struct) */
+};
+
+static u32 word_sum(void *words, int num)
+{
+ u32 *p = words;
+ u32 sum = 0;
+
+ while (num--)
+ sum += *p++;
+
+ return sum;
+}
+
+static u32 word_sum_v2(u32 *p, u32 num)
+{
+ u32 sum = 0;
+ int i;
+
+ for (i = 0; i < num; i++) {
+ u32 val;
+
+ val = p[i];
+ if (val > ~sum)
+ sum++;
+ sum += val;
+ }
+ return ~sum;
+}
+
+static bool afs_is_v1(struct mtd_info *mtd, u_int off)
+{
+ /* The magic is 12 bytes from the end of the erase block */
+ u_int ptr = off + mtd->erasesize - 12;
+ u32 magic;
+ size_t sz;
+ int ret;
+
+ ret = mtd_read(mtd, ptr, 4, &sz, (u_char *)&magic);
+ if (ret < 0) {
+ printk(KERN_ERR "AFS: mtd read failed at 0x%x: %d\n",
+ ptr, ret);
+ return false;
+ }
+ if (ret >= 0 && sz != 4)
+ return false;
+
+ return (magic == AFSV1_FOOTER_MAGIC);
+}
+
+static bool afs_is_v2(struct mtd_info *mtd, u_int off)
+{
+ /* The magic is the 8 last bytes of the erase block */
+ u_int ptr = off + mtd->erasesize - 8;
+ u32 foot[2];
+ size_t sz;
+ int ret;
+
+ ret = mtd_read(mtd, ptr, 8, &sz, (u_char *)foot);
+ if (ret < 0) {
+ printk(KERN_ERR "AFS: mtd read failed at 0x%x: %d\n",
+ ptr, ret);
+ return false;
+ }
+ if (ret >= 0 && sz != 8)
+ return false;
+
+ return (foot[0] == AFSV2_FOOTER_MAGIC1 &&
+ foot[1] == AFSV2_FOOTER_MAGIC2);
+}
+
+static int afs_parse_v1_partition(struct mtd_info *mtd,
+ u_int off, struct mtd_partition *part)
+{
+ struct footer_v1 fs;
+ struct image_info_v1 iis;
+ u_int mask;
+ /*
+ * Static checks cannot see that we bail out if we have an error
+ * reading the footer.
+ */
+ u_int uninitialized_var(iis_ptr);
+ u_int uninitialized_var(img_ptr);
+ u_int ptr;
+ size_t sz;
+ int ret;
+ int i;
+
+ /*
+ * This is the address mask; we use this to mask off out of
+ * range address bits.
+ */
+ mask = mtd->size - 1;
+
+ ptr = off + mtd->erasesize - sizeof(fs);
+ ret = mtd_read(mtd, ptr, sizeof(fs), &sz, (u_char *)&fs);
+ if (ret >= 0 && sz != sizeof(fs))
+ ret = -EINVAL;
+ if (ret < 0) {
+ printk(KERN_ERR "AFS: mtd read failed at 0x%x: %d\n",
+ ptr, ret);
+ return ret;
+ }
+ /*
+ * Check the checksum.
+ */
+ if (word_sum(&fs, sizeof(fs) / sizeof(u32)) != 0xffffffff)
+ return -EINVAL;
+
+ /*
+ * Hide the SIB (System Information Block)
+ */
+ if (fs.type == 2)
+ return 0;
+
+ iis_ptr = fs.image_info_base & mask;
+ img_ptr = fs.image_start & mask;
+
+ /*
+ * Check the image info base. This can not
+ * be located after the footer structure.
+ */
+ if (iis_ptr >= ptr)
+ return 0;
+
+ /*
+ * Check the start of this image. The image
+ * data can not be located after this block.
+ */
+ if (img_ptr > off)
+ return 0;
+
+ /* Read the image info block */
+ memset(&iis, 0, sizeof(iis));
+ ret = mtd_read(mtd, iis_ptr, sizeof(iis), &sz, (u_char *)&iis);
+ if (ret < 0) {
+ printk(KERN_ERR "AFS: mtd read failed at 0x%x: %d\n",
+ iis_ptr, ret);
+ return -EINVAL;
+ }
+
+ if (sz != sizeof(iis))
+ return -EINVAL;
+
+ /*
+ * Validate the name - it must be NUL terminated.
+ */
+ for (i = 0; i < sizeof(iis.name); i++)
+ if (iis.name[i] == '\0')
+ break;
+ if (i > sizeof(iis.name))
+ return -EINVAL;
+
+ part->name = kstrdup(iis.name, GFP_KERNEL);
+ if (!part->name)
+ return -ENOMEM;
+
+ part->size = (iis.length + mtd->erasesize - 1) & ~(mtd->erasesize - 1);
+ part->offset = img_ptr;
+ part->mask_flags = 0;
+
+ printk(" mtd: at 0x%08x, %5lluKiB, %8u, %s\n",
+ img_ptr, part->size / 1024,
+ iis.imageNumber, part->name);
+
+ return 0;
+}
+
+static int afs_parse_v2_partition(struct mtd_info *mtd,
+ u_int off, struct mtd_partition *part)
+{
+ u_int ptr;
+ u32 footer[12];
+ u32 imginfo[36];
+ char *name;
+ u32 version;
+ u32 entrypoint;
+ u32 attributes;
+ u32 region_count;
+ u32 block_start;
+ u32 block_end;
+ u32 crc;
+ size_t sz;
+ int ret;
+ int i;
+ int pad = 0;
+
+ pr_debug("Parsing v2 partition @%08x-%08x\n",
+ off, off + mtd->erasesize);
+
+ /* First read the footer */
+ ptr = off + mtd->erasesize - sizeof(footer);
+ ret = mtd_read(mtd, ptr, sizeof(footer), &sz, (u_char *)footer);
+ if ((ret < 0) || (ret >= 0 && sz != sizeof(footer))) {
+ pr_err("AFS: mtd read failed at 0x%x: %d\n",
+ ptr, ret);
+ return -EIO;
+ }
+ name = (char *) &footer[0];
+ version = footer[9];
+ ptr = off + mtd->erasesize - sizeof(footer) - footer[8];
+
+ pr_debug("found image \"%s\", version %08x, info @%08x\n",
+ name, version, ptr);
+
+ /* Then read the image information */
+ ret = mtd_read(mtd, ptr, sizeof(imginfo), &sz, (u_char *)imginfo);
+ if ((ret < 0) || (ret >= 0 && sz != sizeof(imginfo))) {
+ pr_err("AFS: mtd read failed at 0x%x: %d\n",
+ ptr, ret);
+ return -EIO;
+ }
+
+ /* 32bit platforms have 4 bytes padding */
+ crc = word_sum_v2(&imginfo[1], 34);
+ if (!crc) {
+ pr_debug("Padding 1 word (4 bytes)\n");
+ pad = 1;
+ } else {
+ /* 64bit platforms have 8 bytes padding */
+ crc = word_sum_v2(&imginfo[2], 34);
+ if (!crc) {
+ pr_debug("Padding 2 words (8 bytes)\n");
+ pad = 2;
+ }
+ }
+ if (crc) {
+ pr_err("AFS: bad checksum on v2 image info: %08x\n", crc);
+ return -EINVAL;
+ }
+ entrypoint = imginfo[pad];
+ attributes = imginfo[pad+1];
+ region_count = imginfo[pad+2];
+ block_start = imginfo[20];
+ block_end = imginfo[21];
+
+ pr_debug("image entry=%08x, attr=%08x, regions=%08x, "
+ "bs=%08x, be=%08x\n",
+ entrypoint, attributes, region_count,
+ block_start, block_end);
+
+ for (i = 0; i < region_count; i++) {
+ u32 region_load_addr = imginfo[pad + 3 + i*4];
+ u32 region_size = imginfo[pad + 4 + i*4];
+ u32 region_offset = imginfo[pad + 5 + i*4];
+ u32 region_start;
+ u32 region_end;
+
+ pr_debug(" region %d: address: %08x, size: %08x, "
+ "offset: %08x\n",
+ i,
+ region_load_addr,
+ region_size,
+ region_offset);
+
+ region_start = off + region_offset;
+ region_end = region_start + region_size;
+ /* Align partition to end of erase block */
+ region_end += (mtd->erasesize - 1);
+ region_end &= ~(mtd->erasesize -1);
+ pr_debug(" partition start = %08x, partition end = %08x\n",
+ region_start, region_end);
+
+ /* Create one partition per region */
+ part->name = kstrdup(name, GFP_KERNEL);
+ if (!part->name)
+ return -ENOMEM;
+ part->offset = region_start;
+ part->size = region_end - region_start;
+ part->mask_flags = 0;
+ }
+
+ return 0;
+}
+
+static int parse_afs_partitions(struct mtd_info *mtd,
+ const struct mtd_partition **pparts,
+ struct mtd_part_parser_data *data)
+{
+ struct mtd_partition *parts;
+ u_int off, sz;
+ int ret = 0;
+ int i;
+
+ /* Count the partitions by looping over all erase blocks */
+ for (i = off = sz = 0; off < mtd->size; off += mtd->erasesize) {
+ if (afs_is_v1(mtd, off)) {
+ sz += sizeof(struct mtd_partition);
+ i += 1;
+ }
+ if (afs_is_v2(mtd, off)) {
+ sz += sizeof(struct mtd_partition);
+ i += 1;
+ }
+ }
+
+ if (!i)
+ return 0;
+
+ parts = kzalloc(sz, GFP_KERNEL);
+ if (!parts)
+ return -ENOMEM;
+
+ /*
+ * Identify the partitions
+ */
+ for (i = off = 0; off < mtd->size; off += mtd->erasesize) {
+ if (afs_is_v1(mtd, off)) {
+ ret = afs_parse_v1_partition(mtd, off, &parts[i]);
+ if (ret)
+ goto out_free_parts;
+ i++;
+ }
+ if (afs_is_v2(mtd, off)) {
+ ret = afs_parse_v2_partition(mtd, off, &parts[i]);
+ if (ret)
+ goto out_free_parts;
+ i++;
+ }
+ }
+
+ *pparts = parts;
+ return i;
+
+out_free_parts:
+ while (i >= 0) {
+ if (parts[i].name)
+ kfree(parts[i].name);
+ i--;
+ }
+ kfree(parts);
+ *pparts = NULL;
+ return ret;
+}
+
+static const struct of_device_id mtd_parser_afs_of_match_table[] = {
+ { .compatible = "arm,arm-firmware-suite" },
+ {},
+};
+MODULE_DEVICE_TABLE(of, mtd_parser_afs_of_match_table);
+
+static struct mtd_part_parser afs_parser = {
+ .parse_fn = parse_afs_partitions,
+ .name = "afs",
+ .of_match_table = mtd_parser_afs_of_match_table,
+};
+module_mtd_part_parser(afs_parser);
+
+MODULE_AUTHOR("ARM Ltd");
+MODULE_DESCRIPTION("ARM Firmware Suite partition parser");
+MODULE_LICENSE("GPL");
diff --git a/drivers/mtd/parsers/parser_imagetag.c b/drivers/mtd/parsers/parser_imagetag.c
new file mode 100644
index 000000000000..9537c183a3be
--- /dev/null
+++ b/drivers/mtd/parsers/parser_imagetag.c
@@ -0,0 +1,222 @@
+/*
+ * 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.
+ *
+ */
+
+#define pr_fmt(fmt) KBUILD_MODNAME ": " fmt
+
+#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>
+#include <linux/of.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)
+
+static int bcm963xx_read_imagetag(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 -EINVAL;
+}
+
+static int bcm963xx_parse_imagetag_partitions(struct mtd_info *master,
+ const struct mtd_partition **pparts,
+ struct mtd_part_parser_data *data)
+{
+ /* CFE, NVRAM and global Linux are always present */
+ int nrparts = 0, curpart = 0;
+ struct bcm_tag *buf = NULL;
+ struct mtd_partition *parts;
+ int ret;
+ unsigned int rootfsaddr, kerneladdr, spareaddr, offset;
+ unsigned int rootfslen, kernellen, sparelen, totallen;
+ int i;
+ bool rootfs_first = false;
+
+ buf = vmalloc(sizeof(struct bcm_tag));
+ if (!buf)
+ return -ENOMEM;
+
+ /* Get the tag */
+ ret = bcm963xx_read_imagetag(master, "rootfs", 0, 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 out;
+ }
+
+ 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 out;
+ }
+
+ 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 out;
+ }
+
+ 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 out;
+ }
+
+ /*
+ * Addresses are flash absolute, so convert to partition
+ * relative addresses. Assume either kernel or rootfs will
+ * directly follow the image tag.
+ */
+ if (rootfsaddr < kerneladdr)
+ offset = rootfsaddr - sizeof(struct bcm_tag);
+ else
+ offset = kerneladdr - sizeof(struct bcm_tag);
+
+ kerneladdr = kerneladdr - offset;
+ rootfsaddr = rootfsaddr - offset;
+ spareaddr = roundup(totallen, master->erasesize);
+
+ if (rootfsaddr < kerneladdr) {
+ /* default Broadcom layout */
+ rootfslen = kerneladdr - rootfsaddr;
+ rootfs_first = true;
+ } else {
+ /* OpenWrt layout */
+ rootfsaddr = kerneladdr + kernellen;
+ rootfslen = spareaddr - rootfsaddr;
+ }
+ } else {
+ goto out;
+ }
+ sparelen = master->size - spareaddr;
+
+ /* 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 */
+ 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++;
+ }
+
+ 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 const struct of_device_id parse_bcm963xx_imagetag_match_table[] = {
+ { .compatible = "brcm,bcm963xx-imagetag" },
+ {},
+};
+MODULE_DEVICE_TABLE(of, parse_bcm963xx_imagetag_match_table);
+
+static struct mtd_part_parser bcm963xx_imagetag_parser = {
+ .parse_fn = bcm963xx_parse_imagetag_partitions,
+ .name = "bcm963xx-imagetag",
+ .of_match_table = parse_bcm963xx_imagetag_match_table,
+};
+module_mtd_part_parser(bcm963xx_imagetag_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 parser for BCM963XX CFE Image Tag partitions");
generated by cgit (git 2.34.1) at 2025-04-03 16:40:38 +0000