ihex: add ihex2fw tool for converting HEX files into firmware images (8bd6b222) · Commits · e / devices / android_kernel_xiaomi_markw

firmware/Makefile

+14 −0

Original line number	Diff line number	Diff line
		@@ -32,6 +32,9 @@ quiet_cmd_mkdir = MKDIR $(patsubst $(objtree)/%,%,$@)
		quiet_cmd_ihex = IHEX $@
		cmd_ihex = $(OBJCOPY) -Iihex -Obinary $< $@

		quiet_cmd_ihex2fw = IHEX2FW $@
		cmd_ihex2fw = $(objtree)/$(obj)/ihex2fw $< $@

		quiet_cmd_fwbin = MK_FW $@
		cmd_fwbin = FWNAME="$(patsubst firmware/%.gen.S,%,$@)"; \
		FWSTR="$(subst /,_,$(subst .,_,$(subst -,_,$(patsubst \
		@@ -84,9 +87,18 @@ $(patsubst %,$(obj)/%.gen.S, $(fw-external-y)): %: $(wordsize_deps) \
		$(patsubst %,$(obj)/%.gen.o, $(fw-shipped-y)): %.gen.o: %
		$(patsubst %,$(obj)/%.gen.o, $(fw-external-y)): $(obj)/%.gen.o: $(fwdir)/%

		# .ihex is used just as a simple way to hold binary files in a source tree
		# where binaries are frowned upon. They are directly converted with objcopy.
		$(obj)/%: $(obj)/%.ihex \| $(objtree)/$(obj)/$$(dir %)
		$(call cmd,ihex)

		# .HEX is also Intel HEX, but where the offset and length in each record
		# is actually meaningful, because the firmware has to be loaded in a certain
		# order rather than as a single binary blob. Thus, we convert them into our
		# more compact binary representation of ihex records (<linux/ihex.h>)
		$(obj)/%.fw: $(obj)/%.HEX $(obj)/ihex2fw \| $(objtree)/$(obj)/$$(dir %)
		$(call cmd,ihex2fw)

		$(firmware-dirs):
		$(call cmd,mkdir)

		@@ -101,3 +113,5 @@ targets := $(fw-shipped-) $(patsubst $(obj)/%,%, \
		# Without this, built-in.o won't be created when it's empty, and the
		# final vmlinux link will fail.
		obj-n := dummy

		hostprogs-y := ihex2fw

firmware/ihex2fw.c

0 → 100644

+247 −0

Original line number	Diff line number	Diff line
		/*
		* Parser/loader for IHEX formatted data.
		*
		* Copyright © 2008 David Woodhouse <dwmw2@infradead.org>
		* Copyright © 2005 Jan Harkes <jaharkes@cs.cmu.edu>
		*
		* 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 <stdint.h>
		#include <arpa/inet.h>
		#include <stdio.h>
		#include <errno.h>
		#include <sys/types.h>
		#include <sys/stat.h>
		#include <sys/mman.h>
		#include <fcntl.h>
		#include <string.h>
		#include <unistd.h>
		#include <stdlib.h>

		struct ihex_binrec {
		struct ihex_binrec next; / not part of the real data structure */
		uint32_t addr;
		uint16_t len;
		uint8_t data[];
		};

		/**
		* nybble/hex are little helpers to parse hexadecimal numbers to a byte value
		**/
		static uint8_t nybble(const uint8_t n)
		{
		if (n >= '0' && n <= '9') return n - '0';
		else if (n >= 'A' && n <= 'F') return n - ('A' - 10);
		else if (n >= 'a' && n <= 'f') return n - ('a' - 10);
		return 0;
		}

		static uint8_t hex(const uint8_t data, uint8_t crc)
		{
		uint8_t val = (nybble(data[0]) << 4) \| nybble(data[1]);
		*crc += val;
		return val;
		}

		static int process_ihex(uint8_t *data, ssize_t size);
		static void file_record(struct ihex_binrec *record);
		static int output_records(int outfd);

		static int sort_records = 0;

		int main(int argc, char **argv)
		{
		int infd, outfd;
		struct stat st;
		uint8_t *data;

		if (argc == 4 && !strcmp(argv[1], "-s")) {
		sort_records = 1;
		argc--;
		argv++;
		}
		if (argc != 3) {
		usage:
		fprintf(stderr, "ihex2fw: Convert ihex files into binary "
		"representation for use by Linux kernel\n");
		fprintf(stderr, "usage: ihex2fw [-s] <src.HEX> <dst.fw>\n");
		fprintf(stderr, " -s: sort records by address\n");
		return 1;
		}
		if (!strcmp(argv[1], "-"))
		infd = 0;
		else
		infd = open(argv[1], O_RDONLY);
		if (infd == -1) {
		fprintf(stderr, "Failed to open source file: %s",
		strerror(errno));
		goto usage;
		}
		if (fstat(infd, &st)) {
		perror("stat");
		return 1;
		}
		data = mmap(NULL, st.st_size, PROT_READ, MAP_SHARED, infd, 0);
		if (data == MAP_FAILED) {
		perror("mmap");
		return 1;
		}

		if (!strcmp(argv[2], "-"))
		outfd = 1;
		else
		outfd = open(argv[2], O_TRUNC\|O_CREAT\|O_WRONLY, 0644);
		if (outfd == -1) {
		fprintf(stderr, "Failed to open destination file: %s",
		strerror(errno));
		goto usage;
		}
		if (process_ihex(data, st.st_size))
		return 1;

		output_records(outfd);
		return 0;
		}

		static int process_ihex(uint8_t *data, ssize_t size)
		{
		struct ihex_binrec *record;
		uint32_t offset = 0;
		uint8_t type, crc = 0, crcbyte = 0;
		int i, j;
		int line = 1;
		int len;

		i = 0;
		next_record:
		/* search for the start of record character */
		while (i < size) {
		if (data[i] == '\n') line++;
		if (data[i++] == ':') break;
		}

		/* Minimum record length would be about 10 characters */
		if (i + 10 > size) {
		fprintf(stderr, "Can't find valid record at line %d\n", line);
		return -EINVAL;
		}

		len = hex(data + i, &crc); i += 2;

		record = malloc((sizeof (*record) + len + 3) & ~3);
		if (!record) {
		fprintf(stderr, "out of memory for records\n");
		return -ENOMEM;
		}
		memset(record, 0, (sizeof(*record) + len + 3) & ~3);
		record->len = len;

		/* now check if we have enough data to read everything */
		if (i + 8 + (record->len * 2) > size) {
		fprintf(stderr, "Not enough data to read complete record at line %d\n",
		line);
		return -EINVAL;
		}

		record->addr = hex(data + i, &crc) << 8; i += 2;
		record->addr \|= hex(data + i, &crc); i += 2;
		type = hex(data + i, &crc); i += 2;

		for (j = 0; j < record->len; j++, i += 2)
		record->data[j] = hex(data + i, &crc);

		/* check CRC */
		crcbyte = hex(data + i, &crc); i += 2;
		if (crc != 0) {
		fprintf(stderr, "CRC failure at line %d: got 0x%X, expected 0x%X\n",
		line, crcbyte, (unsigned char)(crcbyte-crc));
		return -EINVAL;
		}

		/* Done reading the record */
		switch (type) {
		case 0:
		/* old style EOF record? */
		if (!record->len)
		break;

		record->addr += offset;
		file_record(record);
		goto next_record;

		case 1: /* End-Of-File Record */
		if (record->addr \|\| record->len) {
		fprintf(stderr, "Bad EOF record (type 01) format at line %d",
		line);
		return -EINVAL;
		}
		break;

		case 2: /* Extended Segment Address Record (HEX86) */
		case 4: /* Extended Linear Address Record (HEX386) */
		if (record->addr \|\| record->len != 2) {
		fprintf(stderr, "Bad HEX86/HEX386 record (type %02X) at line %d\n",
		type, line);
		return -EINVAL;
		}

		/* We shouldn't really be using the offset for HEX86 because
		* the wraparound case is specified quite differently. */
		offset = record->data[0] << 8 \| record->data[1];
		offset <<= (type == 2 ? 4 : 16);
		goto next_record;

		case 3: /* Start Segment Address Record */
		case 5: /* Start Linear Address Record */
		if (record->addr \|\| record->len != 4) {
		fprintf(stderr, "Bad Start Address record (type %02X) at line %d\n",
		type, line);
		return -EINVAL;
		}

		/* These records contain the CS/IP or EIP where execution
		* starts. Don't really know what to do with them. */
		goto next_record;

		default:
		fprintf(stderr, "Unknown record (type %02X)\n", type);
		return -EINVAL;
		}

		return 0;
		}

		static struct ihex_binrec *records;

		static void file_record(struct ihex_binrec *record)
		{
		struct ihex_binrec **p = &records;

		while ((p) && (!sort_records \|\| (p)->addr < record->addr))
		p = &((*p)->next);

		record->next = *p;
		*p = record;
		}

		static int output_records(int outfd)
		{
		unsigned char zeroes[5] = {0, 0, 0, 0, 0};
		struct ihex_binrec *p = records;

		while (p) {
		uint16_t writelen = (p->len + 9) & ~3;

		p->addr = htonl(p->addr);
		p->len = htonl(p->len);
		write(outfd, &p->addr, writelen);
		p = p->next;
		}
		/* EOF record is zero length, since we don't bother to represent
		the type field in the binary version */
		write(outfd, zeroes, 5);
		return 0;
		}

scripts/Makefile.fwinst

+1 −1

Original line number	Diff line number	Diff line
		@@ -6,6 +6,7 @@
		# ==========================================================================

		INSTALL := install
		src := $(obj)

		# For modules_install installing firmware, we want to see .config
		# But for firmware_install, we don't care, but don't want to require it.
		@@ -41,5 +42,4 @@ $(installed-fw): $(INSTALL_FW_PATH)/%: $(obj)/% \| $(INSTALL_FW_PATH)/$$(dir %)/
		__fw_install: $(installed-fw)
		__fw_modinst: $(mod-fw)


		FORCE: