diff options
Diffstat (limited to 'target/linux/bcm4908/patches-5.10/040-v6.1-mtd-parsers-add-Broadcom-s-U-Boot-parser.patch')
| -rw-r--r-- | target/linux/bcm4908/patches-5.10/040-v6.1-mtd-parsers-add-Broadcom-s-U-Boot-parser.patch | 137 |
1 files changed, 0 insertions, 137 deletions
diff --git a/target/linux/bcm4908/patches-5.10/040-v6.1-mtd-parsers-add-Broadcom-s-U-Boot-parser.patch b/target/linux/bcm4908/patches-5.10/040-v6.1-mtd-parsers-add-Broadcom-s-U-Boot-parser.patch deleted file mode 100644 index 4d4059b17f..0000000000 --- a/target/linux/bcm4908/patches-5.10/040-v6.1-mtd-parsers-add-Broadcom-s-U-Boot-parser.patch +++ /dev/null @@ -1,137 +0,0 @@ -From 002181f5b150e60c77f21de7ad4dd10e4614cd91 Mon Sep 17 00:00:00 2001 -From: =?UTF-8?q?Rafa=C5=82=20Mi=C5=82ecki?= <rafal@milecki.pl> -Date: Mon, 11 Jul 2022 17:30:41 +0200 -Subject: [PATCH] mtd: parsers: add Broadcom's U-Boot parser -MIME-Version: 1.0 -Content-Type: text/plain; charset=UTF-8 -Content-Transfer-Encoding: 8bit - -Broadcom stores environment variables blocks inside U-Boot partition -itself. This driver finds & registers them. - -Signed-off-by: Rafał Miłecki <rafal@milecki.pl> -Signed-off-by: Miquel Raynal <miquel.raynal@bootlin.com> -Link: https://lore.kernel.org/linux-mtd/20220711153041.6036-2-zajec5@gmail.com ---- - drivers/mtd/parsers/Kconfig | 10 ++++ - drivers/mtd/parsers/Makefile | 1 + - drivers/mtd/parsers/brcm_u-boot.c | 84 +++++++++++++++++++++++++++++++ - 3 files changed, 95 insertions(+) - create mode 100644 drivers/mtd/parsers/brcm_u-boot.c - ---- a/drivers/mtd/parsers/Kconfig -+++ b/drivers/mtd/parsers/Kconfig -@@ -20,6 +20,16 @@ config MTD_BCM63XX_PARTS - This provides partition parsing for BCM63xx devices with CFE - bootloaders. - -+config MTD_BRCM_U_BOOT -+ tristate "Broadcom's U-Boot partition parser" -+ depends on ARCH_BCM4908 || COMPILE_TEST -+ help -+ Broadcom uses a custom way of storing U-Boot environment variables. -+ They are placed inside U-Boot partition itself at unspecified offset. -+ It's possible to locate them by looking for a custom header with a -+ magic value. This driver does that and creates subpartitions for -+ each found environment variables block. -+ - config MTD_CMDLINE_PARTS - tristate "Command line partition table parsing" - depends on MTD ---- a/drivers/mtd/parsers/Makefile -+++ b/drivers/mtd/parsers/Makefile -@@ -2,6 +2,7 @@ - obj-$(CONFIG_MTD_AR7_PARTS) += ar7part.o - obj-$(CONFIG_MTD_BCM47XX_PARTS) += bcm47xxpart.o - obj-$(CONFIG_MTD_BCM63XX_PARTS) += bcm63xxpart.o -+obj-$(CONFIG_MTD_BRCM_U_BOOT) += brcm_u-boot.o - obj-$(CONFIG_MTD_CMDLINE_PARTS) += cmdlinepart.o - obj-$(CONFIG_MTD_MYLOADER_PARTS) += myloader.o - obj-$(CONFIG_MTD_OF_PARTS) += ofpart.o ---- /dev/null -+++ b/drivers/mtd/parsers/brcm_u-boot.c -@@ -0,0 +1,84 @@ -+// SPDX-License-Identifier: GPL-2.0-only -+/* -+ * Copyright © 2022 Rafał Miłecki <rafal@milecki.pl> -+ */ -+ -+#include <linux/module.h> -+#include <linux/kernel.h> -+#include <linux/slab.h> -+#include <linux/mtd/mtd.h> -+#include <linux/mtd/partitions.h> -+ -+#define BRCM_U_BOOT_MAX_OFFSET 0x200000 -+#define BRCM_U_BOOT_STEP 0x1000 -+ -+#define BRCM_U_BOOT_MAX_PARTS 2 -+ -+#define BRCM_U_BOOT_MAGIC 0x75456e76 /* uEnv */ -+ -+struct brcm_u_boot_header { -+ __le32 magic; -+ __le32 length; -+} __packed; -+ -+static const char *names[BRCM_U_BOOT_MAX_PARTS] = { -+ "u-boot-env", -+ "u-boot-env-backup", -+}; -+ -+static int brcm_u_boot_parse(struct mtd_info *mtd, -+ const struct mtd_partition **pparts, -+ struct mtd_part_parser_data *data) -+{ -+ struct brcm_u_boot_header header; -+ struct mtd_partition *parts; -+ size_t bytes_read; -+ size_t offset; -+ int err; -+ int i = 0; -+ -+ parts = kcalloc(BRCM_U_BOOT_MAX_PARTS, sizeof(*parts), GFP_KERNEL); -+ if (!parts) -+ return -ENOMEM; -+ -+ for (offset = 0; -+ offset < min_t(size_t, mtd->size, BRCM_U_BOOT_MAX_OFFSET); -+ offset += BRCM_U_BOOT_STEP) { -+ err = mtd_read(mtd, offset, sizeof(header), &bytes_read, (uint8_t *)&header); -+ if (err && !mtd_is_bitflip(err)) { -+ pr_err("Failed to read from %s at 0x%zx: %d\n", mtd->name, offset, err); -+ continue; -+ } -+ -+ if (le32_to_cpu(header.magic) != BRCM_U_BOOT_MAGIC) -+ continue; -+ -+ parts[i].name = names[i]; -+ parts[i].offset = offset; -+ parts[i].size = sizeof(header) + le32_to_cpu(header.length); -+ i++; -+ pr_info("offset:0x%zx magic:0x%08x BINGO\n", offset, header.magic); -+ -+ if (i == BRCM_U_BOOT_MAX_PARTS) -+ break; -+ } -+ -+ *pparts = parts; -+ -+ return i; -+}; -+ -+static const struct of_device_id brcm_u_boot_of_match_table[] = { -+ { .compatible = "brcm,u-boot" }, -+ {}, -+}; -+MODULE_DEVICE_TABLE(of, brcm_u_boot_of_match_table); -+ -+static struct mtd_part_parser brcm_u_boot_mtd_parser = { -+ .parse_fn = brcm_u_boot_parse, -+ .name = "brcm_u-boot", -+ .of_match_table = brcm_u_boot_of_match_table, -+}; -+module_mtd_part_parser(brcm_u_boot_mtd_parser); -+ -+MODULE_LICENSE("GPL"); |