static void reattach(void)
{
usb_dev_handle *ir;
ir = get_ir();
if (ir) {
usb_release_interface(ir, 0);
/* attach fails if we still have the file
descriptor open */
usb_close(ir);
usb_attach_kernel_driver_np(ir, 0, "usbhid");
}
}
int main(int argc, char **argv)
{
struct ftdi_context ftdic;
int force_status = -1;
int ret;
if (argc == 2) {
if (strcmp(argv[1], "on") == 0)
force_status = 1;
else if (strcmp(argv[1], "off") == 0)
force_status = 0;
else
usage();
}
ret = ftdi_init(&ftdic);
if (ret < 0) {
fprintf(stderr, "ftdi_init failed\n");
return EXIT_FAILURE;
}
ret = ftdi_usb_open(&ftdic, 0x0403, 0x6015);
if (ret < 0) {
fprintf(stderr, "Can't open ftdi device\n");
return EXIT_FAILURE;
}
ret = ftdi_set_bitmode(&ftdic, CBUS_3_OUT_HIGH, BITMODE_CBUS);
if (ret < 0) {
fprintf(stderr, "unable to set low: %s\n",
ftdi_get_error_string(&ftdic));
return EXIT_FAILURE;
}
ret = modem_is_on(&ftdic);
if (ret < 0) {
fprintf(stderr, "unable to read modem status: %s\n",
ftdi_get_error_string(&ftdic));
return EXIT_FAILURE;
}
if ((force_status >= 0) && (force_status ^ ret)) {
/* Force status changing! */
ret = ftdi_set_bitmode(&ftdic, CBUS_3_OUT_LOW, BITMODE_CBUS);
if (ret < 0) {
fprintf(stderr, "unable to set low: %s\n",
ftdi_get_error_string(&ftdic));
return EXIT_FAILURE;
}
usleep(2000000); /* 2s */
ret = ftdi_set_bitmode(&ftdic, CBUS_3_OUT_HIGH, BITMODE_CBUS);
if (ret < 0) {
fprintf(stderr, "unable to set high: %s\n",
ftdi_get_error_string(&ftdic));
return EXIT_FAILURE;
}
usleep(2000000); /* 2s */
ret = modem_is_on(&ftdic);
if (ret < 0) {
fprintf(stderr, "unable to read modem status: %s\n",
ftdi_get_error_string(&ftdic));
return EXIT_FAILURE;
}
}
printf("modem is %s\n", ret ? "on" : "off");
#ifdef LIBFTDI_LINUX_ASYNC_MODE
/* try to release some kernel resources */
ftdi_async_complete(ftdi, 1);
#endif
ret = usb_release_interface(ftdic.usb_dev, ftdic.interface);
if (ret < 0) {
fprintf(stderr, "unable to release interface (%s)\n",
strerror(errno));
return EXIT_FAILURE;
}
ret = usb_attach_kernel_driver_np(ftdic.usb_dev, ftdic.interface);
if (ret < 0) {
fprintf(stderr, "unable to reattach the driver (%s)\n",
strerror(errno));
return EXIT_FAILURE;
}
ftdi_usb_close(&ftdic);
ftdi_deinit(&ftdic);
return 0;
}
