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Initial KISS support

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Mark Qvist 2014-11-10 00:02:19 +01:00
parent 9addf50a33
commit 6e3d8d9987
18 changed files with 1521 additions and 164 deletions
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Documentation/FT232R/ft232r_prog-1.24/Changelog Normal file
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Version 1.24: (courtesy of Nils Eilers)
-- fixed exit code on success to be 0 instead of EINVAL
-- added --self-powered flag
Version 1.23:
-- added GPLv2 licensing.
Version 1.22:
-- try again to preserve USB version from eeprom.
Version 1.21:
-- preserve USB version from eeprom; libusb no longer does this correctly (sigh).
Version 1.10:
-- now able to invert _all_ the serial and handshake lines (not just DTR).
(courtesy of Jonas Meyer, thanks!)
Version 1.09:
Version 1.08:
-- fix compiler warning from newer gcc
-- Makefile fixes for latest Ubuntu & binutils
Version 1.06:
-- fix libftdi-0.19 API breakage by not using "BM_type_chip" from libftdi0-0.18.

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GNU GENERAL PUBLIC LICENSE
Version 2, June 1991
Copyright (C) 1989, 1991 Free Software Foundation, Inc.
51 Franklin St, Fifth Floor, Boston, MA 02110-1301 USA
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11
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CFLAGS = -Wall -O2 -s -Werror
LDFLAGS = -lusb -lftdi -s
PROG = ft232r_prog
all: $(PROG)
$(PROG): $(PROG).c
$(CC) $(CFLAGS) -o $@ $< $(LDFLAGS)
clean:
rm -f $(PROG)

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/*
* ft232r_prog.c by Mark Lord. Copyright 2010-2013.
*
* This is a Linux command-line alternative to the FTDI MProg/FTProg utilities.
* It is known to work only for FT232R chips at this time.
*
* This program is free software; you can redistribute it and/or modify
* it under the terms of the GNU General Public License as published by
* the Free Software Foundation; either version 2, or (at your option)
* any later version.
*
* 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.
*
* You should have received a copy of the GNU General Public License
* along with this program; see the file LICENSE.txt. If not, write to
* the Free Software Foundation, 675 Mass Ave, Cambridge, MA 02139, USA.
*/
#include <stdlib.h>
#include <stdio.h>
#include <string.h>
#include <errno.h>
#include <sys/types.h>
#include <sys/stat.h>
#include <fcntl.h>
#include <ftdi.h>
#define MYVERSION "1.24"
static struct ftdi_context ftdi;
static int verbose = 0;
static const char *save_path = NULL, *restore_path = NULL;
enum cbus_mode {
cbus_txden = 0,
cbus_pwren = 1,
cbus_rxled = 2,
cbus_txled = 3,
cbus_txrxled = 4,
cbus_sleep = 5,
cbus_clk48 = 6,
cbus_clk24 = 7,
cbus_clk12 = 8,
cbus_clk6 = 9,
cbus_io = 10,
cbus_wr = 11,
cbus_rd = 12,
cbus_rxf = 13,
};
static const char *cbus_mode_strings[] = {
"TxDEN",
"PwrEn",
"RxLED",
"TxLED",
"TxRxLED",
"Sleep",
"Clk48",
"Clk24",
"Clk12",
"Clk6",
"IO",
"WR",
"RD",
"RxF",
NULL
};
enum arg_type {
arg_help,
arg_dump,
arg_verbose,
arg_save,
arg_restore,
arg_cbus0,
arg_cbus1,
arg_cbus2,
arg_cbus3,
arg_cbus4,
arg_manufacturer,
arg_product,
arg_old_serno,
arg_new_serno,
arg_self_powered,
arg_max_bus_power,
arg_high_current_io,
arg_suspend_pull_down,
arg_old_vid,
arg_old_pid,
arg_new_vid,
arg_new_pid,
arg_invert_txd,
arg_invert_rxd,
arg_invert_rts,
arg_invert_cts,
arg_invert_dtr,
arg_invert_dsr,
arg_invert_dcd,
arg_invert_ri,
};
static const char *arg_type_strings[] = {
"--help",
"--dump",
"--verbose",
"--save",
"--restore",
"--cbus0",
"--cbus1",
"--cbus2",
"--cbus3",
"--cbus4",
"--manufacturer",
"--product",
"--old-serial-number",
"--new-serial-number",
"--self-powered",
"--max-bus-power",
"--high-current-io",
"--suspend-pull-down",
"--old-vid",
"--old-pid",
"--new-vid",
"--new-pid",
"--invert_txd",
"--invert_rxd",
"--invert_rts",
"--invert_cts",
"--invert_dtr",
"--invert_dsr",
"--invert_dcd",
"--invert_ri",
NULL
};
static const char *arg_type_help[] = {
" # (show this help text)",
" # (dump eeprom settings to stdout))",
"# (show debug info and raw eeprom contents)",
" # (save original eeprom contents to file)",
"# (restore initial eeprom contents from file)",
"",
"",
"",
"",
"",
" <string> # (new USB manufacturer string)",
" <string> # (new USB product name string)",
"<string> # (current serial number of device to be reprogrammed)",
"<string> # (new USB serial number string)",
" [on|off] # (self powered)",
" <number> # (max bus current in milli-amperes)",
" [on|off] # (enable high [6mA @ 5V] drive current on CBUS pins)",
"[on|off] # (force I/O pins into logic low state on suspend)",
" <number> # (current vendor id of device to be reprogrammed, eg. 0x0403)",
" <number> # (current product id of device to be reprogrammed, eg. 0x6001)",
" <number> # (new/custom vendor id to be programmed)",
" <number> # (new/custom product id be programmed)",
" Inverts the current value of TXD",
" Inverts the current value of RXD",
" Inverts the current value of RTS",
" Inverts the current value of CTS",
" Inverts the current value of DTR",
" Inverts the current value of DSR",
" Inverts the current value of DCD",
" Inverts the current value of RI",
};
static const char *bool_strings[] = {
"off",
"on",
"0",
"1",
"no",
"yes",
"disable",
"enable",
};
struct eeprom_fields {
unsigned char byte01;
unsigned char high_current_io; /* bool */
unsigned char load_d2xx_driver; /* bool */
unsigned char txd_inverted; /* bool */
unsigned char rxd_inverted; /* bool */
unsigned char rts_inverted; /* bool */
unsigned char cts_inverted; /* bool */
unsigned char dtr_inverted; /* bool */
unsigned char dsr_inverted; /* bool */
unsigned char dcd_inverted; /* bool */
unsigned char ri_inverted; /* bool */
unsigned char pnp_enabled; /* bool */
enum cbus_mode cbus[5];
unsigned char extras[112]; /* extra, undefined fields */
struct ftdi_eeprom libftdi; /* stuff known to libftdi */
unsigned char BM_type_chip; /* from libftdi-0.18, missing in 0.19 */
/* These are not actually eeprom values; here for convenience */
unsigned short old_vid;
unsigned short old_pid;
const char *old_serno;
unsigned short new_vid;
unsigned short new_pid;
};
static void dumpmem (const char *msg, void *addr, int len)
{
char *data = addr, hex[3 * 16 + 1], ascii[17];
unsigned int i, offset = 0;
if (msg)
printf("%s:\n", msg);
for (i = 0; i < len;) {
unsigned int i16 = i % 16;
unsigned char c = data[i];
sprintf(hex + (3 * i16), " %02x", c);
ascii[i16] = (c < ' ' || c > '~') ? '.' : c;
if (++i == len || i16 == 15) {
ascii[i16 + 1] = '\0';
for (; i16 != 15; ++i16)
strcat(hex, " ");
printf("%04x:%s %s\n", offset, hex, ascii);
offset = i;
}
}
}
static unsigned short calc_crc (void *addr, int len)
{
unsigned int i;
unsigned short crc = 0xaaaa;
unsigned char *d8 = addr;
for (i = 0; i < len - 2; i += 2) {
crc ^= d8[i] | (d8[i+1] << 8);
crc = (crc << 1) | (crc >> 15);
}
return crc;
}
static void do_deinit (void)
{
ftdi_deinit(&ftdi);
}
static void do_close (void)
{
ftdi_usb_close(&ftdi);
}
static unsigned short verify_crc (void *addr, int len)
{
unsigned short crc = calc_crc(addr, len);
unsigned char *d8 = addr;
unsigned short actual = d8[len-2] | (d8[len-1] << 8);
if (crc != actual) {
fprintf(stderr, "Bad CRC: crc=0x%04x, actual=0x%04x\n", crc, actual);
exit(EINVAL);
}
if (verbose) printf("CRC: Okay (0x%04x)\n", crc);
return crc;
}
static unsigned short update_crc (void *addr, int len)
{
unsigned short crc = calc_crc(addr, len);
unsigned char *d8 = addr;
d8[len-2] = crc;
d8[len-1] = crc >> 8;
return crc;
}
static int match_arg (const char *arg, const char **possibles)
{
int i;
for (i = 0; possibles[i]; ++i) {
if (0 == strcasecmp(possibles[i], arg))
return i;
}
fprintf(stderr, "unrecognized arg: \"%s\"\n", arg);
exit(EINVAL);
return -1; /* never reached */
}
static unsigned long unsigned_val (const char *arg, unsigned long max)
{
unsigned long val;
errno = 0;
val = strtoul(arg, NULL, 0);
if (errno || val > max) {
fprintf(stderr, "%s: bad value (max=0x%lx)\n", arg, max);
exit(EINVAL);
}
return val;
}
static void ee_dump (struct eeprom_fields *ee)
{
unsigned int c;
printf(" eeprom_size = %d\n", ee->libftdi.size);
printf(" vendor_id = 0x%04x\n", ee->libftdi.vendor_id);
printf(" product_id = 0x%04x\n", ee->libftdi.product_id);
printf(" self_powered = %d\n", ee->libftdi.self_powered);
printf(" remote_wakeup = %d\n", ee->libftdi.remote_wakeup);
printf("suspend_pull_downs = %d\n", ee->libftdi.suspend_pull_downs);
printf(" max_bus_power = %d mA\n", 2 * ee->libftdi.max_power);
printf(" manufacturer = %s\n", ee->libftdi.manufacturer);
printf(" product = %s\n", ee->libftdi.product);
printf(" serialnum = %s\n", ee->libftdi.serial);
printf(" high_current_io = %u\n", ee->high_current_io);
printf(" load_d2xx_driver = %u\n", ee->load_d2xx_driver);
printf(" txd_inverted = %u\n", ee->txd_inverted);
printf(" rxd_inverted = %u\n", ee->rxd_inverted);
printf(" rts_inverted = %u\n", ee->rts_inverted);
printf(" cts_inverted = %u\n", ee->cts_inverted);
printf(" dtr_inverted = %u\n", ee->dtr_inverted);
printf(" dsr_inverted = %u\n", ee->dsr_inverted);
printf(" dcd_inverted = %u\n", ee->dcd_inverted);
printf(" ri_inverted = %u\n", ee->ri_inverted);
for (c = 0; c < 5; ++c)
printf(" cbus[%u] = %s\n", c, cbus_mode_strings[ee->cbus[c]]);
if (verbose) {
/* These fields are non-applicable for FT232R devices */
printf(" usb_version = %d\n", ee->libftdi.usb_version);
printf(" use_serialnum = %d (n/a)\n", ee->libftdi.use_serial);
printf("change_usb_version = %d (n/a)\n", ee->libftdi.change_usb_version);
printf(" pnp_enabled = %u (n/a)\n", ee->pnp_enabled);
printf(" BM_type_chip = 0x%02x (n/a)\n", ee->BM_type_chip);
printf(" in_is_isochronous = %d (n/a)\n", ee->libftdi.in_is_isochronous);
printf("out_is_isochronous = %d (n/a)\n", ee->libftdi.out_is_isochronous);
}
};
static unsigned int calc_extras_offset (unsigned char *eeprom)
{
unsigned int str1 = (eeprom[0x0e] & 0x7f) + eeprom[0x0f];
unsigned int str2 = (eeprom[0x10] & 0x7f) + eeprom[0x11];
unsigned int str3 = (eeprom[0x12] & 0x7f) + eeprom[0x13];
unsigned int offset;
if (str3 > str2)
offset = (str3 > str1) ? str3 : str1;
else
offset = (str2 > str1) ? str2 : str1;
return offset;
}
static unsigned int encode_string (void *eeprom, int desc, int offset, char *s)
{
unsigned char c, *u8 = eeprom, slen = (strlen(s) + 1) * 2;
if (!s || !*s)
return offset;
u8[desc + 0] = offset | 0x80; /* offset of string */
u8[desc + 1] = slen; /* length */
u8[offset++] = slen; /* length */
u8[offset++] = 0x03; /* "type" == string */
while ((c = *s++)) {
u8[offset++] = c;
u8[offset++] = 0;
}
return offset;
}
static void ft232r_eprom_build (struct eeprom_fields *ee, unsigned char *eeprom)
{
unsigned int len = ee->libftdi.size;
int offset = 0x18;
memset(eeprom, 0, len);
if (strlen(ee->libftdi.serial) > 16) {
fprintf(stderr, "Serial number string exceeds limit of 16 chars, aborting.\n");
exit(EINVAL);
}
if ((strlen(ee->libftdi.manufacturer) + strlen(ee->libftdi.product) + strlen(ee->libftdi.serial)) > 46) {
fprintf(stderr, "Total string sizes exceed limit of 46 chars, aborting.\n");
exit(EINVAL);
}
offset = encode_string(eeprom, 0x0e, offset, ee->libftdi.manufacturer);
offset = encode_string(eeprom, 0x10, offset, ee->libftdi.product);
offset = encode_string(eeprom, 0x12, offset, ee->libftdi.serial);
eeprom[0x02] = ee->libftdi.vendor_id;
eeprom[0x03] = ee->libftdi.vendor_id >> 8;
eeprom[0x04] = ee->libftdi.product_id;
eeprom[0x05] = ee->libftdi.product_id >> 8;
eeprom[0x07] = ee->BM_type_chip;
eeprom[0x08] = 0x80;
if (ee->libftdi.remote_wakeup)
eeprom[0x08] |= 0x20;
if (ee->libftdi.self_powered)
eeprom[0x08] |= 0x40;
eeprom[0x09] = ee->libftdi.max_power;
if (ee->libftdi.in_is_isochronous)
eeprom[0x0a] |= 0x01;
if (ee->libftdi.out_is_isochronous)
eeprom[0x0a] |= 0x02;
if (ee->libftdi.suspend_pull_downs)
eeprom[0x0a] |= 0x04;
if (ee->libftdi.use_serial)
eeprom[0x0a] |= 0x08;
if (ee->libftdi.change_usb_version)
eeprom[0x0a] |= 0x10;
eeprom[0x0c] = ee->libftdi.usb_version;
eeprom[0x0d] = ee->libftdi.usb_version >> 8;
}
/*
* There are some undefined "extra features" bytes after the strings.
* So blindly preserve them from the original eeprom image.
*/
static void ee_encode_extras (unsigned char *eeprom, int len, struct eeprom_fields *ee)
{
unsigned int extras_offset = calc_extras_offset(eeprom);
memcpy(eeprom + extras_offset, ee->extras, len - extras_offset - 2);
if (ee->pnp_enabled)
eeprom[extras_offset + 2] |= 1;
else
eeprom[extras_offset + 2] &= ~1;
}
static unsigned short ee_encode (unsigned char *eeprom, int len, struct eeprom_fields *ee)
{
int ret;
memset(eeprom, 0, len);
ee->libftdi.size = len;
if (ee->new_vid)
ee->libftdi.vendor_id = ee->new_vid;
if (ee->new_pid)
ee->libftdi.product_id = ee->new_pid;
/* Unfortunately, ftdi_eeprom_build() is buggy and puts things in the wrong places */
if (0) {
ret = ftdi_eeprom_build(&ee->libftdi, eeprom);
if (ret < 0) {
fprintf(stderr, "ftdi_eeprom_build() failed, ret=%d\n", ret);
exit(EINVAL);
}
printf("ftdi_eeprom_build() ret=%d\n", ret);
} else {
ft232r_eprom_build(ee, eeprom);
}
eeprom[1] = ee->byte01;
if (ee->high_current_io)
eeprom[0x00] |= 0x04;
if (ee->load_d2xx_driver)
eeprom[0x00] |= 0x08;
if (ee->txd_inverted)
eeprom[0x0b] |= 0x01;
if (ee->rxd_inverted)
eeprom[0x0b] |= 0x02;
if (ee->rts_inverted)
eeprom[0x0b] |= 0x04;
if (ee->cts_inverted)
eeprom[0x0b] |= 0x08;
if (ee->dtr_inverted)
eeprom[0x0b] |= 0x10;
if (ee->dsr_inverted)
eeprom[0x0b] |= 0x20;
if (ee->dcd_inverted)
eeprom[0x0b] |= 0x40;
if (ee->ri_inverted)
eeprom[0x0b] |= 0x80;
eeprom[0x14] = (ee->cbus[1] << 4) | ee->cbus[0];
eeprom[0x15] = (ee->cbus[3] << 4) | ee->cbus[2];
eeprom[0x16] = ee->cbus[4];
ee_encode_extras(eeprom, len, ee);
return update_crc(eeprom, len);
}
/*
* There are some undefined "extra features" bytes after the strings.
* So blindly preserve them from the original eeprom image.
*/
static void ee_decode_extras (unsigned char *eeprom, int len, struct eeprom_fields *ee)
{
unsigned int extras_offset = calc_extras_offset(eeprom);
memcpy(ee->extras, eeprom + extras_offset, len - extras_offset - 2);
ee->pnp_enabled = eeprom[extras_offset + 2] & 0x01;
}
static void ee_decode (unsigned char *eeprom, int len, struct eeprom_fields *ee)
{
memset(ee, 0, sizeof(*ee));
if (eeprom[0] & 0x04)
ee->high_current_io = 1;
if (eeprom[0x00] & 0x08)
ee->load_d2xx_driver = 1;
ee->byte01 = eeprom[0x01];
if (eeprom[0x0b] & 0x01)
ee->txd_inverted = 1;
if (eeprom[0x0b] & 0x02)
ee->rxd_inverted = 1;
if (eeprom[0x0b] & 0x04)
ee->rts_inverted = 1;
if (eeprom[0x0b] & 0x08)
ee->cts_inverted = 1;
if (eeprom[0x0b] & 0x10)
ee->dtr_inverted = 1;
if (eeprom[0x0b] & 0x20)
ee->dsr_inverted = 1;
if (eeprom[0x0b] & 0x40)
ee->dcd_inverted = 1;
if (eeprom[0x0b] & 0x80)
ee->ri_inverted = 1;
ee->cbus[0] = eeprom[0x14] & 0xf;
ee->cbus[1] = eeprom[0x14] >> 4;
ee->cbus[2] = eeprom[0x15] & 0xf;
ee->cbus[3] = eeprom[0x15] >> 4;
ee->cbus[4] = eeprom[0x16] & 0xf;
ee_decode_extras(eeprom, len, ee);
/* Use libftdi to decode the remaining fields, which it knows about */
if (ftdi_eeprom_decode(&ee->libftdi, eeprom, len)) {
fprintf(stderr, "ftdi_eeprom_decode() failed\n");
exit(EINVAL);
}
ee->BM_type_chip = eeprom[0x07]; /* buggy ftdi_eeprom_decode() */
if (eeprom[0x0a] & 0x10) /* more buggy ftdi_eeprom_decode() */
ee->libftdi.change_usb_version = 1;
else
ee->libftdi.change_usb_version = 0;
ee->libftdi.usb_version = (eeprom[0x0d] << 8) | eeprom[0x0c];;
}
static const char *myname;
static void show_help (FILE *fp)
{
int i;
fprintf(fp, "\nUsage: %s [<arg> <val>]..\n", myname);
fprintf(fp, "\nwhere <arg> must be any of:\n");
for (i = 0; arg_type_strings[i]; ++i) {
const char *val = arg_type_help[i];
fprintf(fp, " %s", arg_type_strings[i]);
if (val) {
if (*val) {
fprintf(fp, " %s", val);
} else { /* cbus args */
int j;
fprintf(fp, " [");
for (j = 0; cbus_mode_strings[j];) {
fprintf(fp, "%s", cbus_mode_strings[j]);
if (cbus_mode_strings[++j])
fprintf(fp, "|");
}
fprintf(fp, "]");
}
}
fputc('\n', fp);
}
fputc('\n', fp);
}
static unsigned short ee_read_and_verify (void *eeprom, int len)
{
if (ftdi_read_eeprom(&ftdi, eeprom)) {
fprintf(stderr, "ftdi_read_eeprom() failed: %s\n", ftdi_get_error_string(&ftdi));
exit(EIO);
}
return verify_crc(eeprom, len);
}
static void process_args (int argc, char *argv[], struct eeprom_fields *ee)
{
int i;
for (i = 1; i < argc;) {
int arg;
arg = match_arg(argv[i++], arg_type_strings);
switch (arg) {
case arg_help:
show_help(stdout);
exit(1);
case arg_dump:
continue;
case arg_verbose:
verbose = 1;
continue;
case arg_invert_txd:
ee->txd_inverted = !ee->txd_inverted;
continue;
case arg_invert_rxd:
ee->rxd_inverted = !ee->rxd_inverted;
continue;
case arg_invert_rts:
ee->rts_inverted = !ee->rts_inverted;
continue;
case arg_invert_cts:
ee->cts_inverted = !ee->cts_inverted;
continue;
case arg_invert_dtr:
ee->dtr_inverted = !ee->dtr_inverted;
continue;
case arg_invert_dsr:
ee->dsr_inverted = !ee->dsr_inverted;
continue;
case arg_invert_dcd:
ee->dcd_inverted = !ee->dcd_inverted;
continue;
case arg_invert_ri:
ee->ri_inverted = !ee->ri_inverted;
continue;
}
if (i == argc) {
fprintf(stderr, "%s: missing %s value\n", argv[i-2], argv[i-1]);
exit(EINVAL);
}
switch (arg) {
case arg_save:
save_path = argv[i++];
break;
case arg_restore:
restore_path = argv[i++];
break;
case arg_cbus0:
case arg_cbus1:
case arg_cbus2:
case arg_cbus3:
case arg_cbus4:
ee->cbus[arg - arg_cbus0] = match_arg(argv[i++], cbus_mode_strings);
break;
case arg_manufacturer:
ee->libftdi.manufacturer = argv[i++];
break;
case arg_product:
ee->libftdi.product = argv[i++];
break;
case arg_new_serno:
ee->libftdi.serial = argv[i++];
break;
case arg_high_current_io:
ee->high_current_io = match_arg(argv[i++], bool_strings) & 1;
break;
case arg_self_powered:
ee->libftdi.self_powered = match_arg(argv[i++], bool_strings) & 1;
break;
case arg_max_bus_power:
ee->libftdi.max_power = unsigned_val(argv[i++], 0x1ff) / 2;
break;
case arg_suspend_pull_down:
ee->libftdi.suspend_pull_downs = unsigned_val(argv[i++], 0xff);
break;
case arg_old_vid:
ee->old_vid = unsigned_val(argv[i++], 0xffff);
break;
case arg_old_pid:
ee->old_pid = unsigned_val(argv[i++], 0xffff);
break;
case arg_old_serno:
ee->old_serno = argv[i++];
break;
case arg_new_vid:
ee->new_vid = unsigned_val(argv[i++], 0xffff);
break;
case arg_new_pid:
ee->new_pid = unsigned_val(argv[i++], 0xffff);
break;
default:
fprintf(stderr, "bad args\n");
exit(EINVAL);
}
}
}
static void save_eeprom_to_file (const char *path, void *eeprom, int len)
{
int count, fd = open(path, O_CREAT|O_WRONLY|O_TRUNC, 0644);
if (fd == -1) {
int err = errno;
perror(path);
exit(err);
}
count = write(fd, eeprom, len);
if (count < 0) {
int err = errno;
perror(path);
exit(err);
}
close(fd);
if (count != len) {
fprintf(stderr, "%s: wrong size, wrote %d/%d bytes\n", path, count, len);
exit(EINVAL);
}
printf("%s: wrote %d bytes\n", path, count);
}
static void restore_eeprom_from_file (const char *path, void *eeprom, int len, int max)
{
int count, fd = open(path, O_RDONLY);
if (fd == -1) {
int err = errno;
perror(path);
exit(err);
}
count = read(fd, eeprom, max);
if (count < 0) {
int err = errno;
perror(path);
exit(err);
}
close(fd);
if (count != len ) {
fprintf(stderr, "%s: wrong size, read %d/%d bytes\n", path, count, len);
exit(EINVAL);
}
printf("%s: read %d bytes\n", path, count);
verify_crc(eeprom, len);
}
int main (int argc, char *argv[])
{
const char *slash;
unsigned char old[256] = {0,}, new[256] = {0,};
unsigned short new_crc;
struct eeprom_fields ee;
unsigned int len = 128;
myname = argv[0];
slash = strrchr(myname, '/');
if (slash)
myname = slash + 1;
printf("\n%s: version %s, by Mark Lord.\n", myname, MYVERSION);
if (argc < 2) {
show_help(stdout);
exit(0);
}
ftdi_init(&ftdi);
atexit(&do_deinit);
memset(&ee, 0, sizeof(ee));
ee.old_vid = 0x0403;; /* default; override with --old_vid arg */
ee.old_pid = 0x6001; /* default; override with --old_pid arg */
process_args(argc, argv, &ee); /* handle --help and --old-* args */
if (ftdi_usb_open_desc(&ftdi, ee.old_vid, ee.old_pid, NULL, ee.old_serno)) {
fprintf(stderr, "ftdi_usb_open() failed for %04x:%04x:%s %s\n",
ee.old_vid, ee.old_pid, ee.old_serno ? ee.old_serno : "", ftdi_get_error_string(&ftdi));
exit(ENODEV);
}
atexit(&do_close);
/* First, read the original eeprom from the device */
(void) ee_read_and_verify(old, len);
if (verbose) dumpmem("existing eeprom", old, len);
/* Save old contents to a file, if requested (--save) */
if (save_path)
save_eeprom_to_file(save_path, old, len);
/* Restore contents from a file, if requested (--restore) */
if (restore_path) {
restore_eeprom_from_file(restore_path, new, len, sizeof(new));
if (verbose) dumpmem(restore_path, new, len);
/* Decode file contents into ee struct */
ee_decode(new, len, &ee);
} else {
/* Decode eeprom contents into ee struct */
ee_decode(old, len, &ee);
/* Reencode without any changes, to ensure we can reconstruct the original eeprom from ee */
new_crc = ee_encode(new, len, &ee);
if (memcmp(old, new, len)) {
if (verbose) dumpmem("reconstructed eeprom", new, len);
fprintf(stderr, "eeprom reconstruction self-test failed, aborting.\n");
exit(EINVAL);
}
}
/* process args, and dump new settings */
process_args(argc, argv, &ee); /* Handle value-change args */
ee_dump(&ee);
/* Build new eeprom image */
new_crc = ee_encode(new, len, &ee);
/* If different from original, then write it back to the device */
if (0 == memcmp(old, new, len)) {
printf("No change from existing eeprom contents.\n");
} else {
if (verbose) dumpmem("new eeprom", new, len);
printf("Rewriting eeprom with new contents.\n");
if (ftdi_write_eeprom(&ftdi, new)) {
fprintf(stderr, "ftdi_write_eeprom() failed: %s\n", ftdi_get_error_string(&ftdi));
exit(EIO);
}
/* Read it back again, and check for differences */
if (ee_read_and_verify(new, len) != new_crc) {
fprintf(stderr, "Readback test failed, results may be botched\n");
exit(EINVAL);
}
ftdi_usb_reset(&ftdi); /* reset the device to force it to load the new settings */
}
return 0;
}

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