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/* Copyright 2018 The ChromiumOS Authors
* Use of this source code is governed by a BSD-style license that can be
* found in the LICENSE file.
*
* Generate transferring data from a file. The transferring data emulates the
* eMMC protocol.
*/
#include <errno.h>
#include <stdint.h>
#include <stdio.h>
#include <string.h>
#include <compile_time_macros.h>
#include <err.h>
#include <getopt.h>
/* eMMC transfer block size */
#define BLOCK_SIZE 512
#define BLOCK_RAW_DATA "bootblock_raw_data"
uint16_t crc16_arg(uint8_t data, uint16_t previous_crc)
{
unsigned int crc = previous_crc << 8;
int i;
crc ^= (data << 16);
for (i = 8; i; i--) {
if (crc & 0x800000)
crc ^= (0x11021 << 7);
crc <<= 1;
}
return (uint16_t)(crc >> 8);
}
void header_format(FILE *fin, FILE *fout)
{
uint8_t data[BLOCK_SIZE];
int blk, j;
uint16_t crc16;
size_t cnt = 0;
fprintf(fout, "/* This file is auto-generated. Do not modify. */\n"
"#ifndef __CROS_EC_BOOTBLOCK_DATA_H\n"
"#define __CROS_EC_BOOTBLOCK_DATA_H\n"
"\n"
"#include <stdint.h>\n"
"\n");
fprintf(fout,
"static const uint8_t %s[] __attribute__((aligned(4))) =\n"
"{\n"
"\t0xff, 0x97, /* Acknowledge boot mode: 1 S=0 010 E=1 11 */\n"
"\t0xff, 0xff, 0xff, 0xff, 0xff, 0xff, 0xff, 0xff,\n",
BLOCK_RAW_DATA);
for (blk = 0;; blk++) {
crc16 = 0;
if (fin)
cnt = fread(data, 1, BLOCK_SIZE, fin);
if (cnt == 0)
break;
else if (cnt < BLOCK_SIZE)
memset(&data[cnt], 0xff, BLOCK_SIZE - cnt);
fprintf(fout, "\t/* Block %d (%ld) */\n", blk, cnt);
fprintf(fout, "\t0xff, 0xfe, /* idle, start bit. */");
for (j = 0; j < sizeof(data); j++) {
fprintf(fout, "%s0x%02x,", (j % 8) == 0 ? "\n\t" : " ",
data[j]);
crc16 = crc16_arg(data[j], crc16);
}
fprintf(fout, "\n");
fprintf(fout,
"\t0x%02x, 0x%02x, 0xff,"
" /* CRC, end bit, idle */\n",
crc16 >> 8, crc16 & 0xff);
}
fprintf(fout, "\t/* Last block: idle */\n");
fprintf(fout, "\t0xff, 0xff, 0xff, 0xff\n");
fprintf(fout, "};\n");
fprintf(fout, "#endif /* __CROS_EC_BOOTBLOCK_DATA_H */\n");
}
int main(int argc, char **argv)
{
int nopt;
int ret = 0;
const char *output_name = NULL;
char *input_name = NULL;
FILE *fin = NULL;
FILE *fout = NULL;
const char short_opts[] = "i:ho:";
const struct option long_opts[] = { { "input", 1, NULL, 'i' },
{ "help", 0, NULL, 'h' },
{ "out", 1, NULL, 'o' },
{ NULL } };
const char usage[] = "USAGE: %s [-i <input>] -o <output>\n";
while ((nopt = getopt_long(argc, argv, short_opts, long_opts, NULL)) !=
-1) {
switch (nopt) {
case 'i': /* -i or --input*/
input_name = optarg;
break;
case 'h': /* -h or --help */
fprintf(stdout, usage, argv[0]);
return 0;
case 'o': /* -o or --out */
output_name = optarg;
break;
default: /* Invalid parameter. */
fprintf(stderr, usage, argv[0]);
return 1;
}
}
if (output_name == NULL) {
fprintf(stderr, usage, argv[0]);
return 1;
}
if (input_name == NULL) {
printf("No bootblock provided, outputting default file.\n");
} else {
fin = fopen(input_name, "r");
if (!fin) {
printf("Cannot open input file: %s\n", input_name);
ret = 1;
goto out;
}
}
fout = fopen(output_name, "w");
if (!fout) {
printf("Cannot open output file: %s\n", output_name);
ret = 1;
goto out;
}
header_format(fin, fout);
fclose(fout);
out:
if (fin)
fclose(fin);
return ret;
}
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