+++ /dev/null
-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>
-[add myloader.c to patch]
-Signed-off-by: Adrian Schmutzler <freifunk@adrianschmutzler.de>
-
---- a/drivers/mtd/Kconfig
-+++ b/drivers/mtd/Kconfig
-@@ -177,6 +177,22 @@ menu "Partition parsers"
- source "drivers/mtd/parsers/Kconfig"
- endmenu
-
-+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.
-+
- comment "User Modules And Translation Layers"
-
- #
---- a/drivers/mtd/Makefile
-+++ b/drivers/mtd/Makefile
-@@ -16,6 +16,7 @@ obj-$(CONFIG_MTD_AFS_PARTS) += afs.o
- obj-$(CONFIG_MTD_AR7_PARTS) += ar7part.o
- obj-$(CONFIG_MTD_BCM63XX_PARTS) += bcm63xxpart.o
- obj-$(CONFIG_MTD_BCM47XX_PARTS) += bcm47xxpart.o
-+obj-$(CONFIG_MTD_MYLOADER_PARTS) += myloader.o
- obj-y += parsers/
-
- # 'Users' - code which presents functionality to userspace.
---- /dev/null
-+++ b/drivers/mtd/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");
projects / openwrt / staging / dedeckeh.git / blobdiff