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@@ -0,0 +1,163 @@
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+/*
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+ * Copyright (C) 2009 Christian Daniel <[email protected]>
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+ * Copyright (C) 2009 Gabor Juhos <[email protected]>
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+ *
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+ * This program is free software; you can redistribute it and/or modify
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+ * it under the terms of the GNU General Public License as published by
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+ * the Free Software Foundation; either version 2 of the License, or
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+ * (at your option) any later version.
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+ *
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+ * This program is distributed in the hope that it will be useful,
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+ * but WITHOUT ANY WARRANTY; without even the implied warranty of
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+ * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
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+ * GNU General Public License for more details.
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+ *
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+ * You should have received a copy of the GNU General Public License
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+ * along with this program; if not, write to the Free Software
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+ * Foundation, Inc., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301 USA
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+ *
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+ * TRX flash partition table.
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+ * Based on ar7 map by Felix Fietkau <[email protected]>
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+ *
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+ */
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+
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+#include <linux/kernel.h>
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+#include <linux/module.h>
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+#include <linux/slab.h>
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+#include <linux/vmalloc.h>
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+
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+#include <linux/mtd/mtd.h>
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+#include <linux/mtd/partitions.h>
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+#include <linux/version.h>
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+
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+struct cybertan_header {
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+ char magic[4];
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+ u8 res1[4];
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+ char fw_date[3];
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+ char fw_ver[3];
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+ char id[4];
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+ char hw_ver;
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+ char unused;
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+ u8 flags[2];
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+ u8 res2[10];
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+} __packed;
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+
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+#define TRX_PARTS 3
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+#define TRX_MAGIC 0x30524448
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+#define TRX_MAX_OFFSET 3
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+
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+struct trx_header {
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+ __le32 magic; /* "HDR0" */
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+ __le32 len; /* Length of file including header */
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+ __le32 crc32; /* 32-bit CRC from flag_version to end of file */
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+ __le32 flag_version; /* 0:15 flags, 16:31 version */
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+ __le32 offsets[TRX_MAX_OFFSET]; /* Offsets of partitions from start of header */
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+} __packed;
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+
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+#define IH_MAGIC 0x27051956 /* Image Magic Number */
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+#define IH_NMLEN 32 /* Image Name Length */
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+
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+struct uimage_header {
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+ __be32 ih_magic; /* Image Header Magic Number */
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+ __be32 ih_hcrc; /* Image Header CRC Checksum */
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+ __be32 ih_time; /* Image Creation Timestamp */
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+ __be32 ih_size; /* Image Data Size */
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+ __be32 ih_load; /* Data» Load Address */
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+ __be32 ih_ep; /* Entry Point Address */
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+ __be32 ih_dcrc; /* Image Data CRC Checksum */
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+ uint8_t ih_os; /* Operating System */
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+ uint8_t ih_arch; /* CPU architecture */
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+ uint8_t ih_type; /* Image Type */
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+ uint8_t ih_comp; /* Compression Type */
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+ uint8_t ih_name[IH_NMLEN]; /* Image Name */
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+} __packed;
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+
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+struct firmware_header {
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+ struct cybertan_header cybertan;
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+ struct trx_header trx;
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+ struct uimage_header uimage;
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+} __packed;
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+
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+static int cybertan_parse_partitions(struct mtd_info *master,
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+ const struct mtd_partition **pparts,
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+ struct mtd_part_parser_data *data)
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+{
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+ struct firmware_header header;
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+ struct trx_header *theader;
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+ struct uimage_header *uheader;
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+ struct mtd_partition *trx_parts;
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+ size_t retlen;
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+ unsigned int kernel_len;
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+ int ret;
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+
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+ trx_parts = kcalloc(TRX_PARTS, sizeof(struct mtd_partition),
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+ GFP_KERNEL);
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+ if (!trx_parts) {
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+ ret = -ENOMEM;
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+ goto out;
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+ }
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+
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+ ret = mtd_read(master, 0, sizeof(header),
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+ &retlen, (uint8_t *)&header);
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+ if (ret)
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+ goto free_parts;
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+
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+ if (retlen != sizeof(header)) {
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+ ret = -EIO;
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+ goto free_parts;
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+ }
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+
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+ theader = &header.trx;
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+ if (theader->magic != cpu_to_le32(TRX_MAGIC)) {
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+ printk(KERN_NOTICE "%s: no TRX header found\n", master->name);
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+ goto free_parts;
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+ }
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+
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+ uheader = &header.uimage;
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+ if (uheader->ih_magic != cpu_to_be32(IH_MAGIC)) {
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+ printk(KERN_NOTICE "%s: no uImage found\n", master->name);
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+ goto free_parts;
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+ }
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+
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+ kernel_len = le32_to_cpu(theader->offsets[1]) +
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+ sizeof(struct cybertan_header);
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+
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+ trx_parts[0].name = "header";
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+ trx_parts[0].offset = 0;
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+ trx_parts[0].size = offsetof(struct firmware_header, uimage);
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+ trx_parts[0].mask_flags = 0;
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+
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+ trx_parts[1].name = "kernel";
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+ trx_parts[1].offset = trx_parts[0].offset + trx_parts[0].size;
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+ trx_parts[1].size = kernel_len - trx_parts[0].size;
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+ trx_parts[1].mask_flags = 0;
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+
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+ trx_parts[2].name = "rootfs";
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+ trx_parts[2].offset = trx_parts[1].offset + trx_parts[1].size;
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+ trx_parts[2].size = master->size - trx_parts[1].size - trx_parts[0].size;
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+ trx_parts[2].mask_flags = 0;
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+
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+ *pparts = trx_parts;
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+ return TRX_PARTS;
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+
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+free_parts:
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+ kfree(trx_parts);
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+out:
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+ return ret;
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+}
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+
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+static const struct of_device_id mtd_parser_cybertan_of_match_table[] = {
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+ { .compatible = "cybertan,trx" },
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+ {},
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+};
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+MODULE_DEVICE_TABLE(of, mtd_parser_cybertan_of_match_table);
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+
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+static struct mtd_part_parser mtd_parser_cybertan = {
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+ .parse_fn = cybertan_parse_partitions,
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+ .name = "cybertan-trx",
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+ .of_match_table = mtd_parser_cybertan_of_match_table,
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+};
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+module_mtd_part_parser(mtd_parser_cybertan);
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+
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+MODULE_LICENSE("GPL");
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+MODULE_AUTHOR("Christian Daniel <[email protected]>");
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Christian Lamparter