int
usb_set_altinterface(usb_dev_handle * dev, int alternate)
{
struct libusb20_device *pdev = (void *)dev;
int err;
uint8_t iface;
iface = pdev->claimed_interface;
err = libusb20_dev_set_alt_index((void *)dev, iface, alternate);
if (err)
return (-1);
return (0);
}
void
usb_set_alt_interface_test(uint16_t vid, uint16_t pid)
{
struct libusb20_device *pdev;
struct libusb20_config *config;
int iter;
int error;
int errcnt;
int n;
int m;
pdev = find_usb_device(vid, pid);
if (pdev == NULL) {
printf("USB device not found\n");
return;
}
printf("Starting set alternate setting test "
"for VID=0x%04x PID=0x%04x\n", vid, pid);
config = libusb20_dev_alloc_config(pdev,
libusb20_dev_get_config_index(pdev));
if (config == NULL) {
printf("Could not get configuration descriptor\n");
libusb20_dev_free(pdev);
return;
}
iter = 0;
errcnt = 0;
for (n = 0; n != config->num_interface; n++) {
/* detach kernel driver */
libusb20_dev_detach_kernel_driver(pdev, n);
error = libusb20_dev_open(pdev, 0);
if (error)
printf("ERROR could not open device\n");
/* Try the alternate settings */
for (m = 0; m != config->interface[n].num_altsetting; m++) {
iter++;
if (libusb20_dev_set_alt_index(pdev, n, m + 1)) {
printf("ERROR on interface %d alt %d\n", n, m + 1);
errcnt++;
}
}
/* Restore to default */
iter++;
if (libusb20_dev_set_alt_index(pdev, n, 0)) {
printf("ERROR on interface %d alt %d\n", n, 0);
errcnt++;
}
libusb20_dev_close(pdev);
}
libusb20_dev_free(pdev);
printf("\n"
"Test summary\n"
"============\n"
"Interfaces tested: %d\n"
"Errors: %d\n", iter, errcnt);
}
