ramips: add support for Fon FON2601

FON2601 is a wireless router.

Specification:
- SoC: Mediatek MT7620A (580MHz)
- RAM: 128 MiB
- ROM: 16 MiB SPI Flash
- Wireless:
   for 11b/g/n (upto 300 Mbps):  MT7620A built-in WMAC
   for 11a/n/ac (upto 867 Mbps): MT7662E
- Ethernet LAN: 1 port, upto 100 Mbps
- Ethernet WAN: 1 port, upto 1000 Mbps
- USB: 1 port (USB 2.0 host)
- LEDs: 4 (all can be controlled by SoC's GPIO)
- buttons: 1 (Displayed as "WPS" on enclosure)
- serial port: 57600n8
 pins: Vcc(3.3V), Rx, Tx, GND
(left to right, viewed from outside of board)

Installation (only available via UART):
  1. download sysupgrade binary image by wget command
  2. write sysupgrade binary image to Flash
     command is:
       mtd write sysupgrade.bin firmware
  3. reboot

Important Notice:
  Only one button is displayed as "WPS" on enclosure.
  However, it is configured as "reset" (factory resetting feature).

Signed-off-by: NOGUCHI Hiroshi <drvlabo@gmail.com>
[removed unrelated openwrt-keyring revert, missing -Wall for uimage_padhdr]
Signed-off-by: Petr Štetiar <ynezz@true.cz>

2 files changed, 158 insertions, 0 deletions

diff --git a/tools/firmware-utils/Makefile b/tools/firmware-utils/Makefile
index d318788ac5..2d2c96ce0a 100644
--- a/tools/firmware-utils/Makefile
+++ b/tools/firmware-utils/Makefile
@@ -92,6 +92,7 @@ define Host/Compile
 	$(call cc,dns313-header, -Wall)
 	$(call cc,mksercommfw, -Wall)
 	$(call cc,nec-enc, -Wall --std=gnu99)
+	$(call cc,uimage_padhdr, -Wall -lz)
 endef
 
 define Host/Install
diff --git a/tools/firmware-utils/src/uimage_padhdr.c b/tools/firmware-utils/src/uimage_padhdr.c
new file mode 100644
index 0000000000..b5fb97d21f
--- /dev/null
+++ b/tools/firmware-utils/src/uimage_padhdr.c
@@ -0,0 +1,157 @@
+/*
+ * uimage_padhdr.c : add zero paddings after the tail of uimage header
+ *
+ * Copyright (C) 2019 NOGUCHI Hiroshi <drvlabo@gmail.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.
+ *
+ * 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.
+ */
+
+#include <stdio.h>
+#include <errno.h>
+#include <unistd.h>
+#include <stdlib.h>
+#include <string.h>
+#include <fcntl.h>
+#include <sys/stat.h>
+#include <arpa/inet.h>
+#include <zlib.h>
+
+
+/* from u-boot/include/image.h */
+#define IH_MAGIC	0x27051956	/* Image Magic Number		*/
+#define IH_NMLEN		32	/* Image Name Length		*/
+
+/*
+ * Legacy format image header,
+ * all data in network byte order (aka natural aka bigendian).
+ */
+typedef struct image_header {
+	uint32_t	ih_magic;	/* Image Header Magic Number	*/
+	uint32_t	ih_hcrc;	/* Image Header CRC Checksum	*/
+	uint32_t	ih_time;	/* Image Creation Timestamp	*/
+	uint32_t	ih_size;	/* Image Data Size		*/
+	uint32_t	ih_load;	/* Data	 Load  Address		*/
+	uint32_t	ih_ep;		/* Entry Point Address		*/
+	uint32_t	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		*/
+} image_header_t;
+
+
+/* default padding size */
+#define	IH_PAD_BYTES		(32)
+
+
+static void usage(char *prog)
+{
+	fprintf(stderr,
+		"%s -i <input_uimage_file> -o <output_file> [-l <padding bytes>]\n",
+		prog);
+}
+
+int main(int argc, char *argv[])
+{
+	struct stat statbuf;
+	u_int8_t *filebuf;
+	int ifd;
+	int ofd;
+	ssize_t rsz;
+	u_int32_t crc_recalc;
+	image_header_t *imgh;
+	int opt;
+	char *infname = NULL;
+	char *outfname = NULL;
+	int padsz = IH_PAD_BYTES;
+	int ltmp;
+
+	while ((opt = getopt(argc, argv, "i:o:l:")) != -1) {
+		switch (opt) {
+		case 'i':
+			infname = optarg;
+			break;
+		case 'o':
+			outfname = optarg;
+			break;
+		case 'l':
+			ltmp = strtol(optarg, NULL, 0);
+			if (ltmp > 0)
+				padsz = ltmp;
+			break;
+		default:
+			break;
+		}
+	}
+
+	if (!infname || !outfname) {
+		usage(argv[0]);
+		exit(1);
+	}
+
+	if (stat(infname, &statbuf) < 0) {
+		fprintf(stderr,
+			"could not find input file. (errno = %d)\n", errno);
+		exit(1);
+	}
+
+	filebuf = malloc(statbuf.st_size + padsz);
+	if (!filebuf) {
+		fprintf(stderr, "buffer allocation failed\n");
+		exit(1);
+	}
+
+	ifd = open(infname, O_RDONLY);
+	if (ifd < 0) {
+		fprintf(stderr,
+			"could not open input file. (errno = %d)\n", errno);
+		exit(1);
+	}
+
+	ofd = open(outfname, O_WRONLY | O_CREAT, 0644);
+	if (ofd < 0) {
+		fprintf(stderr,
+			"could not open output file. (errno = %d)\n", errno);
+		exit(1);
+	}
+
+	rsz = read(ifd, filebuf, sizeof(*imgh));
+	if (rsz != sizeof(*imgh)) {
+		fprintf(stderr,
+			"could not read input file (errno = %d).\n", errno);
+		exit(1);
+	}
+
+	memset(&(filebuf[sizeof(*imgh)]), 0, padsz);
+
+	rsz = read(ifd, &(filebuf[sizeof(*imgh) + padsz]),
+				statbuf.st_size - sizeof(*imgh));
+	if (rsz != (int32_t)(statbuf.st_size - sizeof(*imgh))) {
+		fprintf(stderr,
+			"could not read input file (errno = %d).\n", errno);
+		exit(1);
+	}
+
+	imgh = (image_header_t *)filebuf;
+
+	imgh->ih_hcrc = 0;
+	crc_recalc = crc32(0, filebuf, sizeof(*imgh) + padsz);
+	imgh->ih_hcrc = htonl(crc_recalc);
+
+	rsz = write(ofd, filebuf, statbuf.st_size + padsz);
+	if (rsz != (int32_t)statbuf.st_size + padsz) {
+		fprintf(stderr,
+			"could not write output file (errnor = %d).\n", errno);
+		exit(1);
+	}
+
+	return 0;
+}