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authorGabor Juhos <juhosg@openwrt.org>2011-12-03 18:13:27 +0000
committerGabor Juhos <juhosg@openwrt.org>2011-12-03 18:13:27 +0000
commit514b1167c9157e9c96db40f95098b2b15558915a (patch)
treee5a4b2803929cc49887ac7c6ae19c37a5ea404bf /target/linux/ar71xx/files/drivers/mtd
parentfc7fb29bae314f0bb1a80fec1484c08b05dea50d (diff)
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ar71xx: add mtd partition parser for the TP-Link boards
SVN-Revision: 29415
Diffstat (limited to 'target/linux/ar71xx/files/drivers/mtd')
-rw-r--r--target/linux/ar71xx/files/drivers/mtd/tplinkpart.c165
1 files changed, 165 insertions, 0 deletions
diff --git a/target/linux/ar71xx/files/drivers/mtd/tplinkpart.c b/target/linux/ar71xx/files/drivers/mtd/tplinkpart.c
new file mode 100644
index 0000000000..7b2ac7e40d
--- /dev/null
+++ b/target/linux/ar71xx/files/drivers/mtd/tplinkpart.c
@@ -0,0 +1,165 @@
+/*
+ * Copyright (C) 2011 Gabor Juhos <juhosg@openwrt.org>
+ *
+ * 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/slab.h>
+#include <linux/vmalloc.h>
+
+#include <linux/mtd/mtd.h>
+#include <linux/mtd/partitions.h>
+
+#define TPLINK_NUM_PARTS 5
+#define TPLINK_HEADER_V1 0x01000000
+#define MD5SUM_LEN 16
+
+#define TPLINK_ART_LEN 0x10000
+#define TPLINK_KERNEL_OFFS 0x20000
+
+struct tplink_fw_header {
+ uint32_t version; /* header version */
+ char vendor_name[24];
+ char fw_version[36];
+ uint32_t hw_id; /* hardware id */
+ uint32_t hw_rev; /* hardware revision */
+ uint32_t unk1;
+ uint8_t md5sum1[MD5SUM_LEN];
+ uint32_t unk2;
+ uint8_t md5sum2[MD5SUM_LEN];
+ uint32_t unk3;
+ uint32_t kernel_la; /* kernel load address */
+ uint32_t kernel_ep; /* kernel entry point */
+ uint32_t fw_length; /* total length of the firmware */
+ uint32_t kernel_ofs; /* kernel data offset */
+ uint32_t kernel_len; /* kernel data length */
+ uint32_t rootfs_ofs; /* rootfs data offset */
+ uint32_t rootfs_len; /* rootfs data length */
+ uint32_t boot_ofs; /* bootloader data offset */
+ uint32_t boot_len; /* bootloader data length */
+ uint8_t pad[360];
+} __attribute__ ((packed));
+
+static struct tplink_fw_header *
+tplink_read_header(struct mtd_info *mtd, size_t offset)
+{
+ struct tplink_fw_header *header;
+ size_t header_len;
+ size_t retlen;
+ int ret;
+ u32 t;
+
+ header = vmalloc(sizeof(*header));
+ if (!header)
+ goto err;
+
+ header_len = sizeof(struct tplink_fw_header);
+ ret = mtd->read(mtd, offset, header_len, &retlen,
+ (unsigned char *) header);
+ if (ret)
+ goto err_free_header;
+
+ if (retlen != header_len)
+ goto err_free_header;
+
+ /* sanity checks */
+ t = be32_to_cpu(header->version);
+ if (t != TPLINK_HEADER_V1)
+ goto err_free_header;
+
+ t = be32_to_cpu(header->kernel_ofs);
+ if (t != header_len)
+ goto err_free_header;
+
+ return header;
+
+err_free_header:
+ vfree(header);
+err:
+ return NULL;
+}
+
+static int tplink_parse_partitions(struct mtd_info *master,
+ struct mtd_partition **pparts,
+ unsigned long origin)
+{
+ struct mtd_partition *parts;
+ struct tplink_fw_header *header;
+ int nr_parts;
+ size_t offset;
+ size_t art_offset;
+ size_t rootfs_offset;
+ int ret;
+
+ nr_parts = TPLINK_NUM_PARTS;
+ parts = kzalloc(nr_parts * sizeof(struct mtd_partition), GFP_KERNEL);
+ if (!parts) {
+ ret = -ENOMEM;
+ goto err;
+ }
+
+ offset = TPLINK_KERNEL_OFFS;
+
+ header = tplink_read_header(master, offset);
+ if (!header) {
+ pr_notice("%s: no TP-Link header found\n", master->name);
+ ret = -ENODEV;
+ goto err_free_parts;
+ }
+
+ rootfs_offset = offset + be32_to_cpu(header->rootfs_ofs);
+ art_offset = master->size - TPLINK_ART_LEN;
+
+ parts[0].name = "u-boot";
+ parts[0].offset = 0;
+ parts[0].size = offset;
+ parts[0].mask_flags = MTD_WRITEABLE;
+
+ parts[1].name = "kernel";
+ parts[1].offset = offset;
+ parts[1].size = rootfs_offset - offset;
+
+ parts[2].name = "rootfs";
+ parts[2].offset = rootfs_offset;
+ parts[2].size = art_offset - rootfs_offset;
+
+ parts[3].name = "art";
+ parts[3].offset = art_offset;
+ parts[3].size = TPLINK_ART_LEN;
+ parts[3].mask_flags = MTD_WRITEABLE;
+
+ parts[4].name = "firmware";
+ parts[4].offset = offset;
+ parts[4].size = art_offset - offset;
+
+ vfree(header);
+
+ *pparts = parts;
+ return nr_parts;
+
+err_free_parts:
+ kfree(parts);
+err:
+ *pparts = NULL;
+ return ret;
+}
+
+static struct mtd_part_parser tplink_parser = {
+ .owner = THIS_MODULE,
+ .parse_fn = tplink_parse_partitions,
+ .name = "tp-link",
+};
+
+static int __init tplink_parser_init(void)
+{
+ return register_mtd_parser(&tplink_parser);
+}
+
+module_init(tplink_parser_init);
+
+MODULE_LICENSE("GPL v2");
+MODULE_AUTHOR("Gabor Juhos <juhosg@openwrt.org>");