usbdcore_ep0.c

u-boot-1.1.6 源码包

								 bNumEndpoint);
							return -1;
						}
						/* copy descriptor for this endpoint */
						copy_config (urb, endpoint_descriptor,
							     sizeof (struct usb_endpoint_descriptor),
							     max);
					}
				}
			}
			dbg_ep0 (3, "lengths: %d %d",
				 le16_to_cpu (configuration_descriptor->wTotalLength),
				 urb->actual_length);
		}
		break;

	case USB_DESCRIPTOR_TYPE_STRING:
		{
			struct usb_string_descriptor *string_descriptor;

			if (!(string_descriptor = usbd_get_string (index))) {
				return -1;
			}
			/*dbg_ep0(3, "string_descriptor: %p", string_descriptor); */
			copy_config (urb, string_descriptor, string_descriptor->bLength, max);
		}
		break;
	case USB_DESCRIPTOR_TYPE_INTERFACE:
		return -1;
	case USB_DESCRIPTOR_TYPE_ENDPOINT:
		return -1;
	case USB_DESCRIPTOR_TYPE_HID:
		{
			return -1;	/* unsupported at this time */
#if 0
			int bNumInterface =
				le16_to_cpu (urb->device_request.wIndex);
			int bAlternateSetting = 0;
			int class = 0;
			struct usb_class_descriptor *class_descriptor;

			if (!(class_descriptor =
			      usbd_device_class_descriptor_index (device,
								  port, 0,
								  bNumInterface,
								  bAlternateSetting,
								  class))
			    || class_descriptor->descriptor.hid.bDescriptorType != USB_DT_HID) {
				dbg_ep0 (3, "[%d] interface is not HID",
					 bNumInterface);
				return -1;
			}
			/* copy descriptor for this class */
			copy_config (urb, class_descriptor,
				     class_descriptor->descriptor.hid.bLength,
				     max);
#endif
		}
		break;
	case USB_DESCRIPTOR_TYPE_REPORT:
		{
			return -1;	/* unsupported at this time */
#if 0
			int bNumInterface =
				le16_to_cpu (urb->device_request.wIndex);
			int bAlternateSetting = 0;
			int class = 0;
			struct usb_class_report_descriptor *report_descriptor;

			if (!(report_descriptor =
			      usbd_device_class_report_descriptor_index
			      (device, port, 0, bNumInterface,
			       bAlternateSetting, class))
			    || report_descriptor->bDescriptorType !=
			    USB_DT_REPORT) {
				dbg_ep0 (3, "[%d] descriptor is not REPORT",
					 bNumInterface);
				return -1;
			}
			/* copy report descriptor for this class */
			/*copy_config(urb, &report_descriptor->bData[0], report_descriptor->wLength, max); */
			if (max - urb->actual_length > 0) {
				int length =
					MIN (report_descriptor->wLength,
					     max - urb->actual_length);
				memcpy (urb->buffer + urb->actual_length,
					&report_descriptor->bData[0], length);
				urb->actual_length += length;
			}
#endif
		}
		break;
	default:
		return -1;
	}


	dbg_ep0 (1, "urb: buffer: %p buffer_length: %2d actual_length: %2d packet size: %2d",
		 urb->buffer, urb->buffer_length, urb->actual_length,
		 device->bus->endpoint_array[0].tx_packetSize);
/*
    if ((urb->actual_length < max) && !(urb->actual_length % device->bus->endpoint_array[0].tx_packetSize)) {
	dbg_ep0(0, "adding null byte");
	urb->buffer[urb->actual_length++] = 0;
	dbg_ep0(0, "urb: buffer_length: %2d actual_length: %2d packet size: %2d",
		urb->buffer_length, urb->actual_length device->bus->endpoint_array[0].tx_packetSize);
    }
*/
	return 0;

}

/**
 * ep0_recv_setup - called to indicate URB has been received
 * @urb: pointer to struct urb
 *
 * Check if this is a setup packet, process the device request, put results
 * back into the urb and return zero or non-zero to indicate success (DATA)
 * or failure (STALL).
 *
 */
int ep0_recv_setup (struct urb *urb)
{
	/*struct usb_device_request *request = urb->buffer; */
	/*struct usb_device_instance *device = urb->device; */

	struct usb_device_request *request;
	struct usb_device_instance *device;
	int address;

	dbg_ep0 (0, "entering ep0_recv_setup()");
	if (!urb || !urb->device) {
		dbg_ep0 (3, "invalid URB %p", urb);
		return -1;
	}

	request = &urb->device_request;
	device = urb->device;

	dbg_ep0 (3, "urb: %p device: %p", urb, urb->device);


	/*dbg_ep0(2, "-       -       -       -       -       -       -       -       -       -"); */

	dbg_ep0 (2,
		 "bmRequestType:%02x bRequest:%02x wValue:%04x wIndex:%04x wLength:%04x %s",
		 request->bmRequestType, request->bRequest,
		 le16_to_cpu (request->wValue), le16_to_cpu (request->wIndex),
		 le16_to_cpu (request->wLength),
		 USBD_DEVICE_REQUESTS (request->bRequest));

	/* handle USB Standard Request (c.f. USB Spec table 9-2) */
	if ((request->bmRequestType & USB_REQ_TYPE_MASK) != 0) {
		dbg_ep0 (1, "non standard request: %x",
			 request->bmRequestType & USB_REQ_TYPE_MASK);
		return -1;	/* Stall here */
	}

	switch (device->device_state) {
	case STATE_CREATED:
	case STATE_ATTACHED:
	case STATE_POWERED:
		/* It actually is important to allow requests in these states,
		 * Windows will request descriptors before assigning an
		 * address to the client.
		 */

		/*dbg_ep0 (1, "request %s not allowed in this state: %s", */
		/*                USBD_DEVICE_REQUESTS(request->bRequest), */
		/*                usbd_device_states[device->device_state]); */
		/*return -1; */
		break;

	case STATE_INIT:
	case STATE_DEFAULT:
		switch (request->bRequest) {
		case USB_REQ_GET_STATUS:
		case USB_REQ_GET_INTERFACE:
		case USB_REQ_SYNCH_FRAME:	/* XXX should never see this (?) */
		case USB_REQ_CLEAR_FEATURE:
		case USB_REQ_SET_FEATURE:
		case USB_REQ_SET_DESCRIPTOR:
			/* case USB_REQ_SET_CONFIGURATION: */
		case USB_REQ_SET_INTERFACE:
			dbg_ep0 (1,
				 "request %s not allowed in DEFAULT state: %s",
				 USBD_DEVICE_REQUESTS (request->bRequest),
				 usbd_device_states[device->device_state]);
			return -1;

		case USB_REQ_SET_CONFIGURATION:
		case USB_REQ_SET_ADDRESS:
		case USB_REQ_GET_DESCRIPTOR:
		case USB_REQ_GET_CONFIGURATION:
			break;
		}
	case STATE_ADDRESSED:
	case STATE_CONFIGURED:
		break;
	case STATE_UNKNOWN:
		dbg_ep0 (1, "request %s not allowed in UNKNOWN state: %s",
			 USBD_DEVICE_REQUESTS (request->bRequest),
			 usbd_device_states[device->device_state]);
		return -1;
	}

	/* handle all requests that return data (direction bit set on bm RequestType) */
	if ((request->bmRequestType & USB_REQ_DIRECTION_MASK)) {

		dbg_ep0 (3, "Device-to-Host");

		switch (request->bRequest) {

		case USB_REQ_GET_STATUS:
			return ep0_get_status (device, urb, request->wIndex,
					       request->bmRequestType &
					       USB_REQ_RECIPIENT_MASK);

		case USB_REQ_GET_DESCRIPTOR:
			return ep0_get_descriptor (device, urb,
						   le16_to_cpu (request->wLength),
						   le16_to_cpu (request->wValue) >> 8,
						   le16_to_cpu (request->wValue) & 0xff);

		case USB_REQ_GET_CONFIGURATION:
			return ep0_get_one (device, urb,
					    device->configuration);

		case USB_REQ_GET_INTERFACE:
			return ep0_get_one (device, urb, device->alternate);

		case USB_REQ_SYNCH_FRAME:	/* XXX should never see this (?) */
			return -1;

		case USB_REQ_CLEAR_FEATURE:
		case USB_REQ_SET_FEATURE:
		case USB_REQ_SET_ADDRESS:
		case USB_REQ_SET_DESCRIPTOR:
		case USB_REQ_SET_CONFIGURATION:
		case USB_REQ_SET_INTERFACE:
			return -1;
		}
	}
	/* handle the requests that do not return data */
	else {


		/*dbg_ep0(3, "Host-to-Device"); */
		switch (request->bRequest) {

		case USB_REQ_CLEAR_FEATURE:
		case USB_REQ_SET_FEATURE:
			dbg_ep0 (0, "Host-to-Device");
			switch (request->
				bmRequestType & USB_REQ_RECIPIENT_MASK) {
			case USB_REQ_RECIPIENT_DEVICE:
				/* XXX DEVICE_REMOTE_WAKEUP or TEST_MODE would be added here */
				/* XXX fall through for now as we do not support either */
			case USB_REQ_RECIPIENT_INTERFACE:
			case USB_REQ_RECIPIENT_OTHER:
				dbg_ep0 (0, "request %s not",
					 USBD_DEVICE_REQUESTS (request->bRequest));
			default:
				return -1;

			case USB_REQ_RECIPIENT_ENDPOINT:
				dbg_ep0 (0, "ENDPOINT: %x", le16_to_cpu (request->wValue));
				if (le16_to_cpu (request->wValue) == USB_ENDPOINT_HALT) {
					/*return usbd_device_feature (device, le16_to_cpu (request->wIndex), */
					/*                    request->bRequest == USB_REQ_SET_FEATURE); */
					/* NEED TO IMPLEMENT THIS!!! */
					return -1;
				} else {
					dbg_ep0 (1, "request %s bad wValue: %04x",
						 USBD_DEVICE_REQUESTS
						 (request->bRequest),
						 le16_to_cpu (request->wValue));
					return -1;
				}
			}

		case USB_REQ_SET_ADDRESS:
			/* check if this is a re-address, reset first if it is (this shouldn't be possible) */
			if (device->device_state != STATE_DEFAULT) {
				dbg_ep0 (1, "set_address: %02x state: %s",
					 le16_to_cpu (request->wValue),
					 usbd_device_states[device->device_state]);
				return -1;
			}
			address = le16_to_cpu (request->wValue);
			if ((address & 0x7f) != address) {
				dbg_ep0 (1, "invalid address %04x %04x",
					 address, address & 0x7f);
				return -1;
			}
			device->address = address;

			/*dbg_ep0(2, "address: %d %d %d", */
			/*        request->wValue, le16_to_cpu(request->wValue), device->address); */

			serial_printf ("DEVICE_ADDRESS_ASSIGNED.. event?\n");
			return 0;

		case USB_REQ_SET_DESCRIPTOR:	/* XXX should we support this? */
			dbg_ep0 (0, "set descriptor: NOT SUPPORTED");
			return -1;

		case USB_REQ_SET_CONFIGURATION:
			/* c.f. 9.4.7 - the top half of wValue is reserved */
			/* */
			if ((device->configuration =
			     le16_to_cpu (request->wValue) & 0x7f) != 0) {
				/* c.f. 9.4.7 - zero is the default or addressed state, in our case this */
				/* is the same is configuration zero */
				device->configuration = 0;	/* TBR - ?????? */
			}
			/* reset interface and alternate settings */
			device->interface = device->alternate = 0;

			/*dbg_ep0(2, "set configuration: %d", device->configuration); */
			/*serial_printf("DEVICE_CONFIGURED.. event?\n"); */
			return 0;

		case USB_REQ_SET_INTERFACE:
			device->interface = le16_to_cpu (request->wIndex);
			device->alternate = le16_to_cpu (request->wValue);
			/*dbg_ep0(2, "set interface: %d alternate: %d", device->interface, device->alternate); */
			serial_printf ("DEVICE_SET_INTERFACE.. event?\n");
			return 0;

		case USB_REQ_GET_STATUS:
		case USB_REQ_GET_DESCRIPTOR:
		case USB_REQ_GET_CONFIGURATION:
		case USB_REQ_GET_INTERFACE:
		case USB_REQ_SYNCH_FRAME:	/* XXX should never see this (?) */
			return -1;
		}
	}
	return -1;
}

#endif