add library support for EEPROM access and tool for modification

rtl_eeprom can be used to modify the USB descriptor
strings etc.

Signed-off-by: Steve Markgraf <steve@steve-m.de>
master
Steve Markgraf 12 years ago
parent aad68f3a21
commit b85ffcfea5
  1. 32
      include/rtl-sdr.h
  2. 9
      src/CMakeLists.txt
  3. 5
      src/Makefile.am
  4. 65
      src/librtlsdr.c
  5. 348
      src/rtl_eeprom.c

@ -99,6 +99,38 @@ RTLSDR_API int rtlsdr_get_xtal_freq(rtlsdr_dev_t *dev, uint32_t *rtl_freq,
RTLSDR_API int rtlsdr_get_usb_strings(rtlsdr_dev_t *dev, char *manufact,
char *product, char *serial);
/*!
* Write the device EEPROM
*
* \param dev the device handle given by rtlsdr_open()
* \param data buffer of data to be written
* \param offset address where the data should be written
* \param len length of the data
* \return 0 on success
* \return -1 if device handle is invalid
* \return -2 if EEPROM size is exceeded
* \return -3 if no EEPROM was found
*/
RTLSDR_API int rtlsdr_write_eeprom(rtlsdr_dev_t *dev, uint8_t *data,
uint8_t offset, uint16_t len);
/*!
* Read the device EEPROM
*
* \param dev the device handle given by rtlsdr_open()
* \param data buffer where the data should be written
* \param offset address where the data should be read from
* \param len length of the data
* \return 0 on success
* \return -1 if device handle is invalid
* \return -2 if EEPROM size is exceeded
* \return -3 if no EEPROM was found
*/
RTLSDR_API int rtlsdr_read_eeprom(rtlsdr_dev_t *dev, uint8_t *data,
uint8_t offset, uint16_t len);
RTLSDR_API int rtlsdr_set_center_freq(rtlsdr_dev_t *dev, uint32_t freq);
/*!

@ -70,7 +70,8 @@ add_executable(rtl_sdr rtl_sdr.c)
add_executable(rtl_tcp rtl_tcp.c)
add_executable(rtl_test rtl_test.c)
add_executable(rtl_fm rtl_fm.c)
set(INSTALL_TARGETS rtlsdr_shared rtlsdr_static rtl_sdr rtl_tcp rtl_test rtl_fm)
add_executable(rtl_eeprom rtl_eeprom.c)
set(INSTALL_TARGETS rtlsdr_shared rtlsdr_static rtl_sdr rtl_tcp rtl_test rtl_fm rtl_eeprom)
target_link_libraries(rtl_sdr rtlsdr_shared
${LIBUSB_LIBRARIES}
@ -88,6 +89,10 @@ target_link_libraries(rtl_fm rtlsdr_shared
${LIBUSB_LIBRARIES}
${CMAKE_THREAD_LIBS_INIT}
)
target_link_libraries(rtl_eeprom rtlsdr_shared
${LIBUSB_LIBRARIES}
${CMAKE_THREAD_LIBS_INIT}
)
if(UNIX)
target_link_libraries(rtl_fm m)
if(APPLE)
@ -102,10 +107,12 @@ target_link_libraries(rtl_sdr libgetopt_static)
target_link_libraries(rtl_tcp libgetopt_static)
target_link_libraries(rtl_test libgetopt_static)
target_link_libraries(rtl_fm libgetopt_static)
target_link_libraries(rtl_eeprom libgetopt_static)
set_property(TARGET rtl_sdr APPEND PROPERTY COMPILE_DEFINITIONS "rtlsdr_STATIC" )
set_property(TARGET rtl_tcp APPEND PROPERTY COMPILE_DEFINITIONS "rtlsdr_STATIC" )
set_property(TARGET rtl_test APPEND PROPERTY COMPILE_DEFINITIONS "rtlsdr_STATIC" )
set_property(TARGET rtl_fm APPEND PROPERTY COMPILE_DEFINITIONS "rtlsdr_STATIC" )
set_property(TARGET rtl_eeprom APPEND PROPERTY COMPILE_DEFINITIONS "rtlsdr_STATIC" )
endif()
########################################################################
# Install built library files & utilities

@ -10,7 +10,7 @@ lib_LTLIBRARIES = librtlsdr.la
librtlsdr_la_SOURCES = librtlsdr.c tuner_e4k.c tuner_fc0012.c tuner_fc0013.c tuner_fc2580.c tuner_r820t.c
librtlsdr_la_LDFLAGS = -version-info $(LIBVERSION)
bin_PROGRAMS = rtl_sdr rtl_tcp rtl_test rtl_fm
bin_PROGRAMS = rtl_sdr rtl_tcp rtl_test rtl_fm rtl_eeprom
rtl_sdr_SOURCES = rtl_sdr.c
rtl_sdr_LDADD = librtlsdr.la
@ -23,3 +23,6 @@ rtl_test_LDADD = librtlsdr.la $(LIBM)
rtl_fm_SOURCES = rtl_fm.c
rtl_fm_LDADD = librtlsdr.la $(LIBM)
rtl_eeprom_SOURCES = rtl_eeprom.c
rtl_eeprom_LDADD = librtlsdr.la $(LIBM)

@ -271,6 +271,8 @@ static rtlsdr_dongle_t known_devices[] = {
#define CTRL_TIMEOUT 300
#define BULK_TIMEOUT 0
#define EEPROM_ADDR 0xa0
enum usb_reg {
USB_SYSCTL = 0x2000,
USB_CTRL = 0x2010,
@ -709,6 +711,69 @@ int rtlsdr_get_usb_strings(rtlsdr_dev_t *dev, char *manufact, char *product,
return 0;
}
int rtlsdr_write_eeprom(rtlsdr_dev_t *dev, uint8_t *data, uint8_t offset, uint16_t len)
{
int r = 0;
int i;
uint8_t cmd[2];
if (!dev)
return -1;
if ((len + offset) > 256)
return -2;
for (i = 0; i < len; i++) {
cmd[0] = i + offset;
r = rtlsdr_write_array(dev, IICB, EEPROM_ADDR, cmd, 1);
r = rtlsdr_read_array(dev, IICB, EEPROM_ADDR, &cmd[1], 1);
/* only write the byte if it differs */
if (cmd[1] == data[i])
continue;
cmd[1] = data[i];
r = rtlsdr_write_array(dev, IICB, EEPROM_ADDR, cmd, 2);
if (r != sizeof(cmd))
return -3;
/* for some EEPROMs (e.g. ATC 240LC02) we need a delay
* between write operations, otherwise they will fail */
#ifdef _WIN32
Sleep(5);
#else
usleep(5000);
#endif
}
return 0;
}
int rtlsdr_read_eeprom(rtlsdr_dev_t *dev, uint8_t *data, uint8_t offset, uint16_t len)
{
int r = 0;
int i;
if (!dev)
return -1;
if ((len + offset) > 256)
return -2;
r = rtlsdr_write_array(dev, IICB, EEPROM_ADDR, &offset, 1);
if (r < 0)
return -3;
for (i = 0; i < len; i++) {
r = rtlsdr_read_array(dev, IICB, EEPROM_ADDR, data + i, 1);
if (r < 0)
return -3;
}
return r;
}
int rtlsdr_set_center_freq(rtlsdr_dev_t *dev, uint32_t freq)
{
int r = -1;

@ -0,0 +1,348 @@
/*
* rtl-sdr, turns your Realtek RTL2832 based DVB dongle into a SDR receiver
* rtl_eeprom, EEPROM modification tool
* Copyright (C) 2012 by Steve Markgraf <steve@steve-m.de>
*
* 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 of the License, 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. If not, see <http://www.gnu.org/licenses/>.
*/
#include <string.h>
#include <stdio.h>
#include <stdlib.h>
#ifndef _WIN32
#include <unistd.h>
#else
#include <Windows.h>
#include "getopt/getopt.h"
#endif
#include "rtl-sdr.h"
#define EEPROM_SIZE 256
#define MAX_STR_SIZE 256
#define STR_OFFSET 0x09
static rtlsdr_dev_t *dev = NULL;
typedef struct rtlsdr_config {
uint16_t vendor_id;
uint16_t product_id;
char manufacturer[MAX_STR_SIZE];
char product[MAX_STR_SIZE];
char serial[MAX_STR_SIZE];
int have_serial;
int enable_ir;
int remote_wakeup;
} rtlsdr_config_t;
void dump_config(rtlsdr_config_t *conf)
{
fprintf(stderr, "__________________________________________\n");
fprintf(stderr, "Vendor ID:\t\t0x%04x\n", conf->vendor_id);
fprintf(stderr, "Product ID:\t\t0x%04x\n", conf->product_id);
fprintf(stderr, "Manufacturer:\t\t%s\n", conf->manufacturer);
fprintf(stderr, "Product:\t\t%s\n", conf->product);
fprintf(stderr, "Serial number:\t\t%s\n", conf->serial);
fprintf(stderr, "Serial number enabled:\t");
fprintf(stderr, conf->have_serial ? "yes\n": "no\n");
fprintf(stderr, "IR endpoint enabled:\t");
fprintf(stderr, conf->enable_ir ? "yes\n": "no\n");
fprintf(stderr, "Remote wakeup enabled:\t");
fprintf(stderr, conf->remote_wakeup ? "yes\n": "no\n");
fprintf(stderr, "__________________________________________\n");
}
void usage(void)
{
fprintf(stderr,
"rtl_eeprom, an EEPROM programming tool for "
"RTL2832 based DVB-T receivers\n\n"
"Usage:\n"
"\t[-d device_index (default: 0)]\n"
"\t[-m <str> set manufacturer string\n"
"\t[-p <str> set product string\n"
"\t[-s <str> set serial number string\n"
"\t[-i <0,1> disable/enable IR-endpoint\n"
"\t[-g <str> generate default config and write to device\n"
"\t[-w <filename> write dumped file to device\n"
"\t[-r <filename> dump EEPROM to file\n"
"\t[-h display this help text\n"
"\nUse on your own risk, especially -w!\n");
exit(1);
}
int get_string_descriptor(int pos, uint8_t *data, char *str)
{
int len, i, j = 0;
len = data[pos];
if (data[pos + 1] != 0x03)
fprintf(stderr, "Error: invalid string descriptor!\n");
for(i = 0; i < (len - 2); i += 2)
str[j++] = data[pos + 2 + i];
str[j] = 0x00;
return pos + i + 2;
}
int set_string_descriptor(int pos, uint8_t *data, char *str)
{
int i = 0, j = 2;
if (pos < 0)
return -1;
data[pos + 1] = 0x03;
while (str[i] != 0x00) {
if ((pos + j) >= 78) {
fprintf(stderr, "Error: string too long, truncated!\n");
return -1;
}
data[pos + j++] = str[i++];
data[pos + j++] = 0x00;
}
data[pos] = j;
return pos + j;
}
int parse_eeprom_to_conf(rtlsdr_config_t *conf, uint8_t *dat)
{
int pos;
if ((dat[0] != 0x28) || (dat[1] != 0x32))
fprintf(stderr, "Error: invalid RTL2832 EEPROM header!\n");
conf->vendor_id = dat[2] | (dat[3] << 8);
conf->product_id = dat[4] | (dat[5] << 8);
conf->have_serial = (dat[6] == 0xa5) ? 1 : 0;
conf->remote_wakeup = (dat[7] & 0x01) ? 1 : 0;
conf->enable_ir = (dat[7] & 0x02) ? 1 : 0;
pos = get_string_descriptor(STR_OFFSET, dat, conf->manufacturer);
pos = get_string_descriptor(pos, dat, conf->product);
get_string_descriptor(pos, dat, conf->serial);
return 0;
}
int gen_eeprom_from_conf(rtlsdr_config_t *conf, uint8_t *dat)
{
int pos;
dat[0] = 0x28;
dat[1] = 0x32;
dat[2] = conf->vendor_id & 0xff;
dat[3] = (conf->vendor_id >> 8) & 0xff ;
dat[4] = conf->product_id & 0xff;
dat[5] = (conf->product_id >> 8) & 0xff;
dat[6] = conf->have_serial ? 0xa5 : 0x00;
dat[7] = 0x14;
dat[7] |= conf->remote_wakeup ? 0x01 : 0x00;
dat[7] |= conf->enable_ir ? 0x02 : 0x00;
dat[8] = 0x02;
pos = set_string_descriptor(STR_OFFSET, dat, conf->manufacturer);
pos = set_string_descriptor(pos, dat, conf->product);
pos = set_string_descriptor(pos, dat, conf->serial);
dat[78] = 0x00; /* length of IR config */
return pos;
}
void gen_default_conf(rtlsdr_config_t *conf)
{
conf->vendor_id = 0x0bda;
conf->product_id = 0x2838;
strcpy(conf->manufacturer, "Realtek");
strcpy(conf->product, "RTL2838UHIDIR");
strcpy(conf->serial, "00000001");
conf->have_serial = 1;
conf->enable_ir = 1;
conf->remote_wakeup = 0;
}
int main(int argc, char **argv)
{
int i, r, opt, pos;
uint32_t dev_index = 0;
int device_count;
char *filename = NULL;
FILE *file = NULL;
uint16_t idVendor, idProduct;
char *manuf_str = NULL;
char *product_str = NULL;
char *serial_str = NULL;
uint8_t buf[EEPROM_SIZE];
rtlsdr_config_t conf;
int flash_file = 0;
int default_config = 0;
int change = 0;
int ir_endpoint = 0;
char ch;
while ((opt = getopt(argc, argv, "d:m:p:s:i:gw:r:h?")) != -1) {
switch (opt) {
case 'd':
dev_index = atoi(optarg);
break;
case 'm':
manuf_str = optarg;
change = 1;
break;
case 'p':
product_str = optarg;
change = 1;
break;
case 's':
serial_str = optarg;
change = 1;
break;
case 'i':
ir_endpoint = (atoi(optarg) > 0) ? 1 : -1;
change = 1;
break;
case 'g':
default_config = 1;
change = 1;
break;
case 'w':
flash_file = 1;
change = 1;
case 'r':
filename = optarg;
break;
default:
usage();
break;
}
}
device_count = rtlsdr_get_device_count();
if (!device_count) {
fprintf(stderr, "No supported devices found.\n");
exit(1);
}
fprintf(stderr, "Found %d device(s):\n", device_count);
for (i = 0; i < device_count; i++)
fprintf(stderr, " %d: %s\n", i, rtlsdr_get_device_name(i));
fprintf(stderr, "\n");
fprintf(stderr, "Using device %d: %s\n",
dev_index,
rtlsdr_get_device_name(dev_index));
r = rtlsdr_open(&dev, dev_index);
if (r < 0) {
fprintf(stderr, "Failed to open rtlsdr device #%d.\n", dev_index);
exit(1);
}
fprintf(stderr, "\n");
r = rtlsdr_read_eeprom(dev, buf, 0, EEPROM_SIZE);
if (r < 0) {
if (r == -3)
fprintf(stderr, "No EEPROM has been found.\n");
else
fprintf(stderr, "Failed to read EEPROM, err %i.\n", r);
goto exit;
}
if (r < 0)
return -1;
fprintf(stderr, "Current configuration:\n");
parse_eeprom_to_conf(&conf, buf);
dump_config(&conf);
if (filename) {
file = fopen(filename, flash_file ? "rb" : "wb");
if (!file) {
fprintf(stderr, "Error opening file!\n");
goto exit;
}
if (flash_file) {
if (fread(buf, 1, sizeof(buf), file) != sizeof(buf))
fprintf(stderr, "Error reading file!\n");
} else {
if (fwrite(buf, 1, sizeof(buf), file) != sizeof(buf))
fprintf(stderr, "Short write, exiting!\n");
else
fprintf(stderr, "\nDump to %s successful.\n", filename);
}
}
if (manuf_str)
strncpy((char*)&conf.manufacturer, manuf_str, MAX_STR_SIZE);
if (product_str)
strncpy((char*)&conf.product, product_str, MAX_STR_SIZE);
if (serial_str) {
conf.have_serial = 1;
strncpy((char*)&conf.serial, serial_str, MAX_STR_SIZE);
}
if (ir_endpoint != 0)
conf.enable_ir = (ir_endpoint > 0) ? 1 : 0;
if (!change)
goto exit;
fprintf(stderr, "\nNew configuration:\n");
if (default_config)
gen_default_conf(&conf);
if (!flash_file) {
if (gen_eeprom_from_conf(&conf, buf) < 0)
goto exit;
}
parse_eeprom_to_conf(&conf, buf);
dump_config(&conf);
fprintf(stderr, "Write new configuration to device [y/n]? ");
while ((ch = getchar())) {
if (ch != 'y')
goto exit;
else
break;
}
r = rtlsdr_write_eeprom(dev, buf, 0, flash_file ? EEPROM_SIZE : 128);
if (r < 0)
fprintf(stderr, "Error while writing EEPROM: %i\n", r);
else
fprintf(stderr, "Configuration successfully written.\n");
exit:
if (file)
fclose(file);
rtlsdr_close(dev);
out:
return r >= 0 ? r : -r;
}
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