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authorLinus Walleij <linus.walleij@linaro.org>2019-08-13 09:25:29 +0200
committerRichard Weinberger <richard@nod.at>2019-09-15 23:50:49 +0200
commitac37d352bac5104f86e5bae38481eef902076c15 (patch)
tree5bdbf14610b6178928cb26d2f751fd4964b191fd /drivers/mtd/parsers
parent11f74023888f4e50fd33d3428ce473a10e1f1969 (diff)
mtd: parsers: Move BCM63xx parser
This moves the BCM63xx partition parser down into the parser subdirectory. No functional change. Signed-off-by: Linus Walleij <linus.walleij@linaro.org> Signed-off-by: Richard Weinberger <richard@nod.at>
Diffstat (limited to 'drivers/mtd/parsers')
-rw-r--r--drivers/mtd/parsers/Kconfig9
-rw-r--r--drivers/mtd/parsers/Makefile1
-rw-r--r--drivers/mtd/parsers/bcm63xxpart.c180
3 files changed, 190 insertions, 0 deletions
diff --git a/drivers/mtd/parsers/Kconfig b/drivers/mtd/parsers/Kconfig
index e5288b9bb8c5..e356b4311d4d 100644
--- a/drivers/mtd/parsers/Kconfig
+++ b/drivers/mtd/parsers/Kconfig
@@ -11,6 +11,15 @@ config MTD_BCM47XX_PARTS
This provides partitions parser for devices based on BCM47xx
boards.
+config MTD_BCM63XX_PARTS
+ tristate "BCM63XX CFE partitioning parser"
+ depends on BCM63XX || BMIPS_GENERIC || COMPILE_TEST
+ select CRC32
+ select MTD_PARSER_IMAGETAG
+ help
+ This provides partition parsing for BCM63xx devices with CFE
+ bootloaders.
+
config MTD_PARSER_IMAGETAG
tristate "Parser for BCM963XX Image Tag format partitions"
depends on BCM63XX || BMIPS_GENERIC || COMPILE_TEST
diff --git a/drivers/mtd/parsers/Makefile b/drivers/mtd/parsers/Makefile
index 3e020c66af64..582def540880 100644
--- a/drivers/mtd/parsers/Makefile
+++ b/drivers/mtd/parsers/Makefile
@@ -1,6 +1,7 @@
# SPDX-License-Identifier: GPL-2.0-only
obj-$(CONFIG_MTD_AR7_PARTS) += ar7part.o
obj-$(CONFIG_MTD_BCM47XX_PARTS) += bcm47xxpart.o
+obj-$(CONFIG_MTD_BCM63XX_PARTS) += bcm63xxpart.o
obj-$(CONFIG_MTD_PARSER_IMAGETAG) += parser_imagetag.o
obj-$(CONFIG_MTD_AFS_PARTS) += afs.o
obj-$(CONFIG_MTD_PARSER_TRX) += parser_trx.o
diff --git a/drivers/mtd/parsers/bcm63xxpart.c b/drivers/mtd/parsers/bcm63xxpart.c
new file mode 100644
index 000000000000..78f90c6c18fd
--- /dev/null
+++ b/drivers/mtd/parsers/bcm63xxpart.c
@@ -0,0 +1,180 @@
+// SPDX-License-Identifier: GPL-2.0-or-later
+/*
+ * 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>
+ */
+
+#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>
+#include <linux/of.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 const char * const bcm63xx_cfe_part_types[] = {
+ "bcm963xx-imagetag",
+ NULL,
+};
+
+static int bcm63xx_parse_cfe_nor_partitions(struct mtd_info *master,
+ const struct mtd_partition **pparts, struct bcm963xx_nvram *nvram)
+{
+ struct mtd_partition *parts;
+ int nrparts = 3, curpart = 0;
+ unsigned int cfelen, nvramlen;
+ unsigned int cfe_erasesize;
+ int i;
+
+ 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);
+
+ parts = kzalloc(sizeof(*parts) * nrparts + 10 * nrparts, GFP_KERNEL);
+ if (!parts)
+ return -ENOMEM;
+
+ /* Start building partition list */
+ parts[curpart].name = "CFE";
+ parts[curpart].offset = 0;
+ parts[curpart].size = cfelen;
+ 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;
+ parts[curpart].types = bcm63xx_cfe_part_types;
+
+ 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);
+
+ *pparts = parts;
+
+ 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 const struct of_device_id parse_bcm63xx_cfe_match_table[] = {
+ { .compatible = "brcm,bcm963xx-cfe-nor-partitions" },
+ {},
+};
+MODULE_DEVICE_TABLE(of, parse_bcm63xx_cfe_match_table);
+
+static struct mtd_part_parser bcm63xx_cfe_parser = {
+ .parse_fn = bcm63xx_parse_cfe_partitions,
+ .name = "bcm63xxpart",
+ .of_match_table = parse_bcm63xx_cfe_match_table,
+};
+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");