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ihex: Add support for long records to ihex2fw.c

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Some drivers could do with using records like Intel HEX, but with each
record being larger than 256 bytes. This has been possible in the binary
representation (struct ihex_binrec) in the kernel since the beginning --
at least of the the current version of history. But we haven't been able
to represent that in the .HEX files which get converted to .fw files.

This adds a '-w' option to ihex2fw to make it interpret the first _two_
bytes of each line as the record length, instead of only one byte. And
adds makefile rules for %.H16->%.fw which use that.

Signed-off-by: David Woodhouse <dwmw2@infradead.org>
This commit is contained in:
David Woodhouse 2008-06-26 13:55:30 +01:00 committed by David Woodhouse
parent 8bd6b2229b
commit 59890f74e5
2 changed files with 47 additions and 19 deletions
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7
firmware/Makefile
View file

@ -35,6 +35,9 @@ quiet_cmd_ihex = IHEX $@
quiet_cmd_ihex2fw = IHEX2FW $@
cmd_ihex2fw = $(objtree)/$(obj)/ihex2fw $< $@
quiet_cmd_h16tofw = H16TOFW $@
cmd_h16tofw = $(objtree)/$(obj)/ihex2fw -w $< $@
quiet_cmd_fwbin = MK_FW $@
cmd_fwbin = FWNAME="$(patsubst firmware/%.gen.S,%,$@)"; \
FWSTR="$(subst /,_,$(subst .,_,$(subst -,_,$(patsubst \
@ -99,6 +102,10 @@ $(obj)/%: $(obj)/%.ihex | $(objtree)/$(obj)/$$(dir %)
$(obj)/%.fw: $(obj)/%.HEX $(obj)/ihex2fw | $(objtree)/$(obj)/$$(dir %)
$(call cmd,ihex2fw)
# .H16 is our own modified form of Intel HEX, with 16-bit length for records.
$(obj)/%.fw: $(obj)/%.H16 $(obj)/ihex2fw | $(objtree)/$(obj)/$$(dir %)
$(call cmd,h16tofw)
$(firmware-dirs):
$(call cmd,mkdir)

59
firmware/ihex2fw.c
View file

@ -20,6 +20,9 @@
#include <string.h>
#include <unistd.h>
#include <stdlib.h>
#define _GNU_SOURCE
#include <getopt.h>
struct ihex_binrec {
struct ihex_binrec *next; /* not part of the real data structure */
@ -51,34 +54,49 @@ static void file_record(struct ihex_binrec *record);
static int output_records(int outfd);
static int sort_records = 0;
static int wide_records = 0;
int usage(void)
{
fprintf(stderr, "ihex2fw: Convert ihex files into binary "
"representation for use by Linux kernel\n");
fprintf(stderr, "usage: ihex2fw [<options>] <src.HEX> <dst.fw>\n");
fprintf(stderr, " -w: wide records (16-bit length)\n");
fprintf(stderr, " -s: sort records by address\n");
return 1;
}
int main(int argc, char **argv)
{
int infd, outfd;
struct stat st;
uint8_t *data;
int opt;
if (argc == 4 && !strcmp(argv[1], "-s")) {
sort_records = 1;
argc--;
argv++;
while ((opt = getopt(argc, argv, "ws")) != -1) {
switch (opt) {
case 'w':
wide_records = 1;
break;
case 's':
sort_records = 1;
break;
default:
return usage();
}
}
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], "-"))
if (optind + 2 != argc)
return usage();
if (!strcmp(argv[optind], "-"))
infd = 0;
else
infd = open(argv[1], O_RDONLY);
infd = open(argv[optind], O_RDONLY);
if (infd == -1) {
fprintf(stderr, "Failed to open source file: %s",
strerror(errno));
goto usage;
return usage();
}
if (fstat(infd, &st)) {
perror("stat");
@ -90,14 +108,14 @@ int main(int argc, char **argv)
return 1;
}
if (!strcmp(argv[2], "-"))
if (!strcmp(argv[optind+1], "-"))
outfd = 1;
else
outfd = open(argv[2], O_TRUNC|O_CREAT|O_WRONLY, 0644);
outfd = open(argv[optind+1], O_TRUNC|O_CREAT|O_WRONLY, 0644);
if (outfd == -1) {
fprintf(stderr, "Failed to open destination file: %s",
strerror(errno));
goto usage;
return usage();
}
if (process_ihex(data, st.st_size))
return 1;
@ -130,7 +148,10 @@ next_record:
}
len = hex(data + i, &crc); i += 2;
if (wide_records) {
len <<= 8;
len += hex(data + i, &crc); i += 2;
}
record = malloc((sizeof (*record) + len + 3) & ~3);
if (!record) {
fprintf(stderr, "out of memory for records\n");