ar71xx: Add support for Teltonika RUT900

Teltonika RUT900 is a Router with LTE dual SIM, WiFi, 4x Ethernet
ports, I/O, RS232, RS485, GPS.

The device ist based on a Atheros AR9344 rev 3,

Specifications:
- 560/450/225 MHz (CPU/DDR/AHB)
- 128 MB of RAM
- 16 MB of FLASH
- Serial Console header on a Card Board edge connector
- 4x 10/100 Mbps Ethernet (3x LAN, 1x WAN)
- 2.4 GHz Wifi
- 2x external, detachable Wifi antennas
- LTE Modem Huawei ME909u-521 (Also other Modem seen)
- 2x LTE antennas
- 1x GPS antenna
- 7x LED, 1x button
- 1x USB Connector
- 1x Serial RS232
- 1x Serial RS485
- 1x MicroSD Card

The GPL sources of the device are available at www.teltonika.lt/gpl/
and are based on OpenWRT Barrier Breaker (14.07)

Running from tftp:

The Router starts into the uboot Webupdater if the Button ist pressed
more than 3 seconds, if no Network cable is attached it starts the
uboot serial console, from there the router loads the firmware image
via tftpboot from 192.168.1.2:firmware.bin (the router has the
192.168.1.1). With bootm the loaded image will be booted.

Signed-off-by: Steffen Weinreich <steve@weinreich.org>

1 files changed, 206 insertions, 0 deletions

diff --git a/target/linux/ar71xx/files/drivers/mtd/tltpart.c b/target/linux/ar71xx/files/drivers/mtd/tltpart.c
new file mode 100644
index 0000000000..92f558d778
--- /dev/null
+++ b/target/linux/ar71xx/files/drivers/mtd/tltpart.c
@@ -0,0 +1,206 @@
+/*
+ * 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/module.h>
+#include <linux/slab.h>
+#include <linux/vmalloc.h>
+#include <linux/magic.h>
+
+#include <linux/mtd/mtd.h>
+#include <linux/mtd/partitions.h>
+
+#define TLT_NUM_PARTS	7
+#define TLT_HEADER_V1	0x01000000
+#define MD5SUM_LEN		16
+
+#define TLT_UBOOT_LEN	0x20000
+#define TLT_CONFIG_LEN	0x10000
+#define TLT_ART_LEN		0x10000
+#define EVENTLOG_LEN		0x90000
+
+struct tlt_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 tlt_fw_header *
+tlt_read_header(struct mtd_info *mtd, size_t offset)
+{
+	struct tlt_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 tlt_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 != TLT_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 tlt_check_rootfs_magic(struct mtd_info *mtd, size_t offset)
+{
+	u32 magic;
+	size_t retlen;
+	int ret;
+
+	ret = mtd_read(mtd, offset, sizeof(magic), &retlen,
+		       (unsigned char *) &magic);
+	if (ret)
+		return ret;
+
+	if (retlen != sizeof(magic))
+		return -EIO;
+
+	if (le32_to_cpu(magic) != SQUASHFS_MAGIC &&
+	    magic != 0x19852003)
+		return -EINVAL;
+
+	return 0;
+}
+
+static int tlt_parse_partitions(struct mtd_info *master,
+				   struct mtd_partition **pparts,
+				   struct mtd_part_parser_data *data)
+{
+	struct mtd_partition *parts;
+	struct tlt_fw_header *header;
+	int nr_parts;
+	size_t kernel_offset;
+	size_t rootfs_offset;
+	size_t squashfs_offset;
+	int ret;
+
+	nr_parts = TLT_NUM_PARTS;
+	parts = kzalloc(nr_parts * sizeof(struct mtd_partition), GFP_KERNEL);
+	if (!parts) {
+		ret = -ENOMEM;
+		goto err;
+	}
+
+	kernel_offset = TLT_UBOOT_LEN + TLT_CONFIG_LEN + TLT_ART_LEN;
+
+	header = tlt_read_header(master, kernel_offset);
+	if (!header) {
+		pr_notice("%s: no TP-Link header found\n", master->name);
+		ret = -ENODEV;
+		goto err_free_parts;
+	}
+
+	squashfs_offset = kernel_offset + sizeof(struct tlt_fw_header) +
+			  be32_to_cpu(header->kernel_len);
+
+	ret = tlt_check_rootfs_magic(master, squashfs_offset);
+	if (ret == 0)
+		rootfs_offset = squashfs_offset;
+	else
+		rootfs_offset = kernel_offset + be32_to_cpu(header->rootfs_ofs);
+
+	vfree(header);
+
+	parts[0].name = "u-boot";
+	parts[0].offset = 0;
+	parts[0].size = TLT_UBOOT_LEN;
+	parts[0].mask_flags = MTD_WRITEABLE;
+	
+	parts[1].name = "config";
+	parts[1].offset = TLT_UBOOT_LEN;
+	parts[1].size = TLT_CONFIG_LEN;
+	
+	parts[2].name = "art";
+	parts[2].offset = TLT_UBOOT_LEN + TLT_CONFIG_LEN;
+	parts[2].size = TLT_ART_LEN;
+	parts[2].mask_flags = MTD_WRITEABLE;
+
+	parts[3].name = "kernel";
+	parts[3].offset = kernel_offset;
+	parts[3].size = rootfs_offset - kernel_offset;
+
+	parts[4].name = "rootfs";
+	parts[4].offset = rootfs_offset;
+	parts[4].size = master->size - rootfs_offset - EVENTLOG_LEN;
+
+	parts[5].name = "firmware";
+	parts[5].offset = kernel_offset;
+	parts[5].size = master->size - kernel_offset - EVENTLOG_LEN;
+
+	parts[6].name = "event-log";
+	parts[6].offset = master->size - EVENTLOG_LEN;
+	parts[6].size = EVENTLOG_LEN;
+
+	*pparts = parts;
+	return nr_parts;
+
+err_free_parts:
+	kfree(parts);
+err:
+	*pparts = NULL;
+	return ret;
+}
+
+static struct mtd_part_parser tlt_parser = {
+	.owner		= THIS_MODULE,
+	.parse_fn	= tlt_parse_partitions,
+	.name		= "tlt",
+};
+
+static int __init tlt_parser_init(void)
+{
+	register_mtd_parser(&tlt_parser);
+
+	return 0;
+}
+
+module_init(tlt_parser_init);
+
+MODULE_LICENSE("GPL v2");
+MODULE_AUTHOR("Gabor Juhos <juhosg@openwrt.org>");