/** Retrieve basic descriptors from the device.
*
* @param[in] ctrl_pipe Control endpoint pipe.
* @param[out] descriptors Where to store the descriptors.
* @return Error code.
*/
static int usb_device_retrieve_descriptors(usb_device_t *usb_dev)
{
assert(usb_dev);
assert(usb_dev->descriptors.full_config == NULL);
/* Get the device descriptor. */
int rc = usb_request_get_device_descriptor(&usb_dev->ctrl_pipe,
&usb_dev->descriptors.device);
if (rc != EOK) {
return rc;
}
/* Get the full configuration descriptor. */
rc = usb_request_get_full_configuration_descriptor_alloc(
&usb_dev->ctrl_pipe, 0,
&usb_dev->descriptors.full_config,
&usb_dev->descriptors.full_config_size);
return rc;
}
/** Create match ids describing attached device.
*
* @warning The list of match ids @p matches may change even when
* function exits with error.
*
* @param ctrl_pipe Control pipe to given device (session must be already
* started).
* @param matches Initialized list of match ids.
* @return Error code.
*/
int usb_device_create_match_ids(usb_pipe_t *ctrl_pipe,
match_id_list_t *matches)
{
assert(ctrl_pipe);
int rc;
/*
* Retrieve device descriptor and add matches from it.
*/
usb_standard_device_descriptor_t device_descriptor;
rc = usb_request_get_device_descriptor(ctrl_pipe, &device_descriptor);
if (rc != EOK) {
return rc;
}
rc = usb_device_create_match_ids_from_device_descriptor(
&device_descriptor, matches);
if (rc != EOK) {
return rc;
}
return EOK;
}
usbinfo_device_t *prepare_device(const char *name,
devman_handle_t hc_handle, usb_address_t dev_addr)
{
usbinfo_device_t *dev = malloc(sizeof(usbinfo_device_t));
if (dev == NULL) {
fprintf(stderr, NAME ": memory allocation failed.\n");
return NULL;
}
int rc;
bool transfer_started = false;
usb_hc_connection_initialize(&dev->hc_conn, hc_handle);
rc = usb_device_connection_initialize(
&dev->wire, &dev->hc_conn, dev_addr);
if (rc != EOK) {
fprintf(stderr,
NAME ": failed to create connection to device %s: %s.\n",
name, str_error(rc));
goto leave;
}
rc = usb_pipe_initialize_default_control(&dev->ctrl_pipe,
&dev->wire);
if (rc != EOK) {
fprintf(stderr,
NAME ": failed to create default control pipe to %s: %s.\n",
name, str_error(rc));
goto leave;
}
rc = usb_pipe_probe_default_control(&dev->ctrl_pipe);
if (rc != EOK) {
if (rc == ENOENT) {
fprintf(stderr, NAME ": " \
"device %s not present or malfunctioning.\n",
name);
} else {
fprintf(stderr, NAME ": " \
"probing default control pipe of %s failed: %s.\n",
name, str_error(rc));
}
goto leave;
}
usb_pipe_start_long_transfer(&dev->ctrl_pipe);
transfer_started = true;
rc = usb_request_get_device_descriptor(&dev->ctrl_pipe,
&dev->device_descriptor);
if (rc != EOK) {
fprintf(stderr,
NAME ": failed to retrieve device descriptor of %s: %s.\n",
name, str_error(rc));
goto leave;
}
rc = usb_request_get_full_configuration_descriptor_alloc(
&dev->ctrl_pipe, 0, (void **)&dev->full_configuration_descriptor,
&dev->full_configuration_descriptor_size);
if (rc != EOK) {
fprintf(stderr, NAME ": " \
"failed to retrieve configuration descriptor of %s: %s.\n",
name, str_error(rc));
goto leave;
}
return dev;
leave:
if (transfer_started) {
usb_pipe_end_long_transfer(&dev->ctrl_pipe);
}
free(dev);
return NULL;
}
