diff options
Diffstat (limited to 'pkgs/patches-linux-5.15/430-mtd-add-myloader-partition-parser.patch')
| -rw-r--r-- | pkgs/patches-linux-5.15/430-mtd-add-myloader-partition-parser.patch | 229 |
1 files changed, 229 insertions, 0 deletions
diff --git a/pkgs/patches-linux-5.15/430-mtd-add-myloader-partition-parser.patch b/pkgs/patches-linux-5.15/430-mtd-add-myloader-partition-parser.patch new file mode 100644 index 0000000..0889c9a --- /dev/null +++ b/pkgs/patches-linux-5.15/430-mtd-add-myloader-partition-parser.patch @@ -0,0 +1,229 @@ +From: Florian Fainelli <f.fainelli@gmail.com> +Subject: Add myloader partition table parser + +[john@phozen.org: shoud be upstreamable] + +lede-commit: d8bf22859b51faa09d22c056fe221a45d2f7a3b8 +Signed-off-by: Florian Fainelli <f.fainelli@gmail.com> +[adjust for kernel 5.4, add myloader.c to patch] +Signed-off-by: Adrian Schmutzler <freifunk@adrianschmutzler.de> + +--- a/drivers/mtd/parsers/Kconfig ++++ b/drivers/mtd/parsers/Kconfig +@@ -57,6 +57,22 @@ config MTD_CMDLINE_PARTS + + If unsure, say 'N'. + ++config MTD_MYLOADER_PARTS ++ tristate "MyLoader partition parsing" ++ depends on ADM5120 || ATH25 || ATH79 ++ help ++ MyLoader is a bootloader which allows the user to define partitions ++ in flash devices, by putting a table in the second erase block ++ on the device, similar to a partition table. This table gives the ++ offsets and lengths of the user defined partitions. ++ ++ 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. ++ + config MTD_OF_PARTS + tristate "OpenFirmware (device tree) partitioning parser" + default y +--- a/drivers/mtd/parsers/Makefile ++++ b/drivers/mtd/parsers/Makefile +@@ -3,6 +3,7 @@ obj-$(CONFIG_MTD_AR7_PARTS) += ar7part. + obj-$(CONFIG_MTD_BCM47XX_PARTS) += bcm47xxpart.o + obj-$(CONFIG_MTD_BCM63XX_PARTS) += bcm63xxpart.o + obj-$(CONFIG_MTD_CMDLINE_PARTS) += cmdlinepart.o ++obj-$(CONFIG_MTD_MYLOADER_PARTS) += myloader.o + obj-$(CONFIG_MTD_OF_PARTS) += ofpart.o + ofpart-y += ofpart_core.o + ofpart-$(CONFIG_MTD_OF_PARTS_BCM4908) += ofpart_bcm4908.o +--- /dev/null ++++ b/drivers/mtd/parsers/myloader.c +@@ -0,0 +1,181 @@ ++/* ++ * Parse MyLoader-style flash partition tables and produce a Linux partition ++ * array to match. ++ * ++ * Copyright (C) 2007-2009 Gabor Juhos <juhosg@openwrt.org> ++ * ++ * This file was based on drivers/mtd/redboot.c ++ * Author: Red Hat, Inc. - David Woodhouse <dwmw2@cambridge.redhat.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. ++ */ ++ ++#include <linux/kernel.h> ++#include <linux/module.h> ++#include <linux/version.h> ++#include <linux/slab.h> ++#include <linux/init.h> ++#include <linux/vmalloc.h> ++#include <linux/mtd/mtd.h> ++#include <linux/mtd/partitions.h> ++#include <linux/byteorder/generic.h> ++#include <linux/myloader.h> ++ ++#define BLOCK_LEN_MIN 0x10000 ++#define PART_NAME_LEN 32 ++ ++struct part_data { ++ struct mylo_partition_table tab; ++ char names[MYLO_MAX_PARTITIONS][PART_NAME_LEN]; ++}; ++ ++static int myloader_parse_partitions(struct mtd_info *master, ++ const struct mtd_partition **pparts, ++ struct mtd_part_parser_data *data) ++{ ++ struct part_data *buf; ++ struct mylo_partition_table *tab; ++ struct mylo_partition *part; ++ struct mtd_partition *mtd_parts; ++ struct mtd_partition *mtd_part; ++ int num_parts; ++ int ret, i; ++ size_t retlen; ++ char *names; ++ unsigned long offset; ++ unsigned long blocklen; ++ ++ buf = vmalloc(sizeof(*buf)); ++ if (!buf) { ++ return -ENOMEM; ++ goto out; ++ } ++ tab = &buf->tab; ++ ++ blocklen = master->erasesize; ++ if (blocklen < BLOCK_LEN_MIN) ++ blocklen = BLOCK_LEN_MIN; ++ ++ offset = blocklen; ++ ++ /* Find the partition table */ ++ for (i = 0; i < 4; i++, offset += blocklen) { ++ printk(KERN_DEBUG "%s: searching for MyLoader partition table" ++ " at offset 0x%lx\n", master->name, offset); ++ ++ ret = mtd_read(master, offset, sizeof(*buf), &retlen, ++ (void *)buf); ++ if (ret) ++ goto out_free_buf; ++ ++ if (retlen != sizeof(*buf)) { ++ ret = -EIO; ++ goto out_free_buf; ++ } ++ ++ /* Check for Partition Table magic number */ ++ if (tab->magic == le32_to_cpu(MYLO_MAGIC_PARTITIONS)) ++ break; ++ ++ } ++ ++ if (tab->magic != le32_to_cpu(MYLO_MAGIC_PARTITIONS)) { ++ printk(KERN_DEBUG "%s: no MyLoader partition table found\n", ++ master->name); ++ ret = 0; ++ goto out_free_buf; ++ } ++ ++ /* The MyLoader and the Partition Table is always present */ ++ num_parts = 2; ++ ++ /* Detect number of used partitions */ ++ for (i = 0; i < MYLO_MAX_PARTITIONS; i++) { ++ part = &tab->partitions[i]; ++ ++ if (le16_to_cpu(part->type) == PARTITION_TYPE_FREE) ++ continue; ++ ++ num_parts++; ++ } ++ ++ mtd_parts = kzalloc((num_parts * sizeof(*mtd_part) + ++ num_parts * PART_NAME_LEN), GFP_KERNEL); ++ ++ if (!mtd_parts) { ++ ret = -ENOMEM; ++ goto out_free_buf; ++ } ++ ++ mtd_part = mtd_parts; ++ names = (char *)&mtd_parts[num_parts]; ++ ++ strncpy(names, "myloader", PART_NAME_LEN); ++ mtd_part->name = names; ++ mtd_part->offset = 0; ++ mtd_part->size = offset; ++ mtd_part->mask_flags = MTD_WRITEABLE; ++ mtd_part++; ++ names += PART_NAME_LEN; ++ ++ strncpy(names, "partition_table", PART_NAME_LEN); ++ mtd_part->name = names; ++ mtd_part->offset = offset; ++ mtd_part->size = blocklen; ++ mtd_part->mask_flags = MTD_WRITEABLE; ++ mtd_part++; ++ names += PART_NAME_LEN; ++ ++ for (i = 0; i < MYLO_MAX_PARTITIONS; i++) { ++ part = &tab->partitions[i]; ++ ++ if (le16_to_cpu(part->type) == PARTITION_TYPE_FREE) ++ continue; ++ ++ if ((buf->names[i][0]) && (buf->names[i][0] != '\xff')) ++ strncpy(names, buf->names[i], PART_NAME_LEN); ++ else ++ snprintf(names, PART_NAME_LEN, "partition%d", i); ++ ++ mtd_part->offset = le32_to_cpu(part->addr); ++ mtd_part->size = le32_to_cpu(part->size); ++ mtd_part->name = names; ++ mtd_part++; ++ names += PART_NAME_LEN; ++ } ++ ++ *pparts = mtd_parts; ++ ret = num_parts; ++ ++ out_free_buf: ++ vfree(buf); ++ out: ++ return ret; ++} ++ ++static struct mtd_part_parser myloader_mtd_parser = { ++ .owner = THIS_MODULE, ++ .parse_fn = myloader_parse_partitions, ++ .name = "MyLoader", ++}; ++ ++static int __init myloader_mtd_parser_init(void) ++{ ++ register_mtd_parser(&myloader_mtd_parser); ++ ++ return 0; ++} ++ ++static void __exit myloader_mtd_parser_exit(void) ++{ ++ deregister_mtd_parser(&myloader_mtd_parser); ++} ++ ++module_init(myloader_mtd_parser_init); ++module_exit(myloader_mtd_parser_exit); ++ ++MODULE_AUTHOR("Gabor Juhos <juhosg@openwrt.org>"); ++MODULE_DESCRIPTION("Parsing code for MyLoader partition tables"); ++MODULE_LICENSE("GPL v2"); |