--- /dev/null
+/*
+ * Copyright (C) 2009 Christian Daniel <cd@maintech.de>
+ * Copyright (C) 2009 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 as published by
+ * the Free Software Foundation; either version 2 of the License, or
+ * (at your option) any later version.
+ *
+ * This program is distributed in the hope that it will be useful,
+ * but WITHOUT ANY WARRANTY; without even the implied warranty of
+ * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
+ * GNU General Public License for more details.
+ *
+ * You should have received a copy of the GNU General Public License
+ * along with this program; if not, write to the Free Software
+ * Foundation, Inc., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301 USA
+ *
+ * TRX flash partition table.
+ * Based on ar7 map by Felix Fietkau <nbd@nbd.name>
+ *
+ */
+
+#include <linux/kernel.h>
+#include <linux/module.h>
+#include <linux/slab.h>
+#include <linux/vmalloc.h>
+
+#include <linux/mtd/mtd.h>
+#include <linux/mtd/partitions.h>
+#include <linux/version.h>
+
+struct cybertan_header {
+ char magic[4];
+ u8 res1[4];
+ char fw_date[3];
+ char fw_ver[3];
+ char id[4];
+ char hw_ver;
+ char unused;
+ u8 flags[2];
+ u8 res2[10];
+} __packed;
+
+#define TRX_PARTS 3
+#define TRX_MAGIC 0x30524448
+#define TRX_MAX_OFFSET 3
+
+struct trx_header {
+ __le32 magic; /* "HDR0" */
+ __le32 len; /* Length of file including header */
+ __le32 crc32; /* 32-bit CRC from flag_version to end of file */
+ __le32 flag_version; /* 0:15 flags, 16:31 version */
+ __le32 offsets[TRX_MAX_OFFSET]; /* Offsets of partitions from start of header */
+} __packed;
+
+#define IH_MAGIC 0x27051956 /* Image Magic Number */
+#define IH_NMLEN 32 /* Image Name Length */
+
+struct uimage_header {
+ __be32 ih_magic; /* Image Header Magic Number */
+ __be32 ih_hcrc; /* Image Header CRC Checksum */
+ __be32 ih_time; /* Image Creation Timestamp */
+ __be32 ih_size; /* Image Data Size */
+ __be32 ih_load; /* Data» Load Address */
+ __be32 ih_ep; /* Entry Point Address */
+ __be32 ih_dcrc; /* Image Data CRC Checksum */
+ uint8_t ih_os; /* Operating System */
+ uint8_t ih_arch; /* CPU architecture */
+ uint8_t ih_type; /* Image Type */
+ uint8_t ih_comp; /* Compression Type */
+ uint8_t ih_name[IH_NMLEN]; /* Image Name */
+} __packed;
+
+struct firmware_header {
+ struct cybertan_header cybertan;
+ struct trx_header trx;
+ struct uimage_header uimage;
+} __packed;
+
+static int cybertan_parse_partitions(struct mtd_info *master,
+ const struct mtd_partition **pparts,
+ struct mtd_part_parser_data *data)
+{
+ struct firmware_header header;
+ struct trx_header *theader;
+ struct uimage_header *uheader;
+ struct mtd_partition *trx_parts;
+ size_t retlen;
+ unsigned int kernel_len;
+ int ret;
+
+ trx_parts = kcalloc(TRX_PARTS, sizeof(struct mtd_partition),
+ GFP_KERNEL);
+ if (!trx_parts) {
+ ret = -ENOMEM;
+ goto out;
+ }
+
+ ret = mtd_read(master, 0, sizeof(header),
+ &retlen, (uint8_t *)&header);
+ if (ret)
+ goto free_parts;
+
+ if (retlen != sizeof(header)) {
+ ret = -EIO;
+ goto free_parts;
+ }
+
+ theader = &header.trx;
+ if (theader->magic != cpu_to_le32(TRX_MAGIC)) {
+ printk(KERN_NOTICE "%s: no TRX header found\n", master->name);
+ goto free_parts;
+ }
+
+ uheader = &header.uimage;
+ if (uheader->ih_magic != cpu_to_be32(IH_MAGIC)) {
+ printk(KERN_NOTICE "%s: no uImage found\n", master->name);
+ goto free_parts;
+ }
+
+ kernel_len = le32_to_cpu(theader->offsets[1]) +
+ sizeof(struct cybertan_header);
+
+ trx_parts[0].name = "header";
+ trx_parts[0].offset = 0;
+ trx_parts[0].size = offsetof(struct firmware_header, uimage);
+ trx_parts[0].mask_flags = 0;
+
+ trx_parts[1].name = "kernel";
+ trx_parts[1].offset = trx_parts[0].offset + trx_parts[0].size;
+ trx_parts[1].size = kernel_len - trx_parts[0].size;
+ trx_parts[1].mask_flags = 0;
+
+ trx_parts[2].name = "rootfs";
+ trx_parts[2].offset = trx_parts[1].offset + trx_parts[1].size;
+ trx_parts[2].size = master->size - trx_parts[1].size - trx_parts[0].size;
+ trx_parts[2].mask_flags = 0;
+
+ *pparts = trx_parts;
+ return TRX_PARTS;
+
+free_parts:
+ kfree(trx_parts);
+out:
+ return ret;
+}
+
+static const struct of_device_id mtd_parser_cybertan_of_match_table[] = {
+ { .compatible = "cybertan,trx" },
+ {},
+};
+MODULE_DEVICE_TABLE(of, mtd_parser_cybertan_of_match_table);
+
+static struct mtd_part_parser mtd_parser_cybertan = {
+ .parse_fn = cybertan_parse_partitions,
+ .name = "cybertan-trx",
+ .of_match_table = mtd_parser_cybertan_of_match_table,
+};
+module_mtd_part_parser(mtd_parser_cybertan);
+
+MODULE_LICENSE("GPL");
+MODULE_AUTHOR("Christian Daniel <cd@maintech.de>");
projects / openwrt / staging / hauke.git / commitdiff