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/*
gcc -Wall ttpci-firmware.c -o ttpci-firmware
*/
#include <stdio.h>
#include <stdlib.h>
#include <stdint.h>
#include <netinet/in.h>
#include <string.h>
/* crc stuff shamelessly stolen from linux-2.6.0/lib/crc32.c */
/*
* There are multiple 16-bit CRC polynomials in common use, but this is
* *the* standard CRC-32 polynomial, first popularized by Ethernet.
* x^32+x^26+x^23+x^22+x^16+x^12+x^11+x^10+x^8+x^7+x^5+x^4+x^2+x^1+x^0
*/
#define CRCPOLY_LE 0xedb88320
#define CRCPOLY_BE 0x04c11db7
uint32_t crc32_le(uint32_t crc, unsigned char const *p, size_t len)
{
int i;
while (len--) {
crc ^= *p++;
for (i = 0; i < 8; i++)
crc = (crc >> 1) ^ ((crc & 1) ? CRCPOLY_LE : 0);
}
return crc;
}
uint32_t crc32_be(uint32_t crc, unsigned char const *p, size_t len)
{
int i;
while (len--) {
crc ^= *p++ << 24;
for (i = 0; i < 8; i++)
crc = (crc << 1) ^ ((crc & 0x80000000) ? CRCPOLY_BE : 0);
}
return crc;
}
int convert(const char *filename, FILE * out)
{
uint32_t crc = 0, len = 0;
long size = 0;
unsigned char *mem = NULL;
FILE *f = NULL;
int ret = 0;
f = fopen(filename, "rb");
if (NULL == f) {
fprintf(stderr, "cannot open input file '%s'\n", filename);
ret = -1;
goto out;
}
fseek(f, 0, SEEK_END);
size = ftell(f);
fseek(f, 0, SEEK_SET);
if (0 == size) {
fprintf(stderr, "file size is 0\n");
ret = -1;
goto out;
}
mem = (unsigned char *) malloc(size);
if (NULL == mem) {
fprintf(stderr, "out of memory.\n");
ret = -1;
goto out;
}
if (1 != fread(mem, size, 1, f)) {
fprintf(stderr, "cannot read from input file.\n");
ret = -1;
goto out;
}
crc = crc32_le(0, mem, size);
crc = htonl(crc);
if (4 != fwrite((unsigned char *) &crc, 1, 4, out)) {
fprintf(stderr, "cannot write to output file #1.\n");
ret = -1;
goto out;
}
len = htonl(size);
if (4 != fwrite((unsigned char *) &len, 1, 4, out)) {
fprintf(stderr, "cannot write to output file #2.\n");
ret = -1;
goto out;
}
if (1 != fwrite(mem, size, 1, out)) {
fprintf(stderr, "cannot write to output file #3.\n");
ret = -1;
goto out;
}
fprintf(stderr, "file: '%s', crc32: 0x%08x, size:%ld\n", filename, ntohl(crc), size);
ret = 0;
out:
if (NULL != mem)
free(mem);
if (NULL != f)
fclose(f);
return ret;
}
int main(int argc, char *argv[])
{
char fn[256];
FILE *f = NULL;
const char *magic = "AVFW";
if (argc < 4) {
fprintf(stderr, "usage: %s dpram root version [output]\n", argv[0]);
return 1;
}
if (argc >= 4) {
snprintf(fn, 255, "dvb-ttpci-%s.fw",argv[3]);
} else {
snprintf(fn, 255, "dvb-ttpci-unknown.fw");
}
f = fopen(fn, "wb+");
if (NULL == f) {
fprintf(stderr, "cannot open output file '%s'\n", fn);
return -1;
}
if (4 != fwrite(magic, 1, 4, f)) {
fprintf(stderr, "cannot write magic bytes to output file.\n");
fclose(f);
return -1;
}
if (0 != convert(argv[1], f)) {
fprintf(stderr, "cannot write dpram stuff output file.\n");
fclose(f);
return -1;
}
if (0 != convert(argv[2], f)) {
fprintf(stderr, "cannot write root stuff output file.\n");
fclose(f);
return -1;
}
fclose(f);
fprintf(stderr, "ok, firmware written to '%s'\n",fn);
return 0;
}
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