usb.c

		 *   maxpacket the device uses, the USB controller may only accept a
		 *   single packet. Consequently we are only guaranteed to receive 1
		 *   packet (at least 8 bytes) even in a non-error case.
		 *
		 * At least the DWC2 controller needs to be programmed with the number
		 * of packets in addition to the number of bytes. A request for 64
		 * bytes of data with the maxpacket guessed as 64 (above) yields a
		 * request for 1 packet.
		 */
		err = get_descriptor_len(dev, 64, 8);
		if (err)
			return err;
	}

	dev->epmaxpacketin[0] = dev->descriptor.bMaxPacketSize0;
	dev->epmaxpacketout[0] = dev->descriptor.bMaxPacketSize0;
	switch (dev->descriptor.bMaxPacketSize0) {
	case 8:
		dev->maxpacketsize  = PACKET_SIZE_8;
		break;
	case 16:
		dev->maxpacketsize = PACKET_SIZE_16;
		break;
	case 32:
		dev->maxpacketsize = PACKET_SIZE_32;
		break;
	case 64:
		dev->maxpacketsize = PACKET_SIZE_64;
		break;
	default:
		printf("usb_new_device: invalid max packet size\n");
		return -EIO;
	}

	return 0;
}

static int usb_prepare_device(struct usb_device *dev, int addr, bool do_read,
			      struct usb_device *parent)
{
	int err;

	/*
	 * Allocate usb 3.0 device context.
	 * USB 3.0 (xHCI) protocol tries to allocate device slot
	 * and related data structures first. This call does that.
	 * Refer to sec 4.3.2 in xHCI spec rev1.0
	 */
	err = usb_alloc_device(dev);
	if (err) {
		printf("Cannot allocate device context to get SLOT_ID\n");
		return err;
	}
	err = usb_setup_descriptor(dev, do_read);
	if (err)
		return err;
	err = usb_hub_port_reset(dev, parent);
	if (err)
		return err;

	dev->devnum = addr;

	err = usb_set_address(dev); /* set address */

	if (err < 0) {
		printf("\n      USB device not accepting new address " \
			"(error=%lX)\n", dev->status);
		return err;
	}

	mdelay(10);	/* Let the SET_ADDRESS settle */

	return 0;
}

int usb_select_config(struct usb_device *dev)
{
	unsigned char *tmpbuf = 0;
	int err;

	err = get_descriptor_len(dev, USB_DT_DEVICE_SIZE, USB_DT_DEVICE_SIZE);
	if (err)
		return err;

	/* correct le values */
	le16_to_cpus(&dev->descriptor.bcdUSB);
	le16_to_cpus(&dev->descriptor.idVendor);
	le16_to_cpus(&dev->descriptor.idProduct);
	le16_to_cpus(&dev->descriptor.bcdDevice);

	/* only support for one config for now */
	err = usb_get_configuration_len(dev, 0);
	if (err >= 0) {
		tmpbuf = (unsigned char *)malloc_cache_aligned(err);
		if (!tmpbuf)
			err = -ENOMEM;
		else
			err = usb_get_configuration_no(dev, 0, tmpbuf, err);
	}
	if (err < 0) {
		printf("usb_new_device: Cannot read configuration, " \
		       "skipping device %04x:%04x\n",
		       dev->descriptor.idVendor, dev->descriptor.idProduct);
		free(tmpbuf);
		return err;
	}
	usb_parse_config(dev, tmpbuf, 0);
	free(tmpbuf);
	usb_set_maxpacket(dev);
	/*
	 * we set the default configuration here
	 * This seems premature. If the driver wants a different configuration
	 * it will need to select itself.
	 */
	err = usb_set_configuration(dev, dev->config.desc.bConfigurationValue);
	if (err < 0) {
		printf("failed to set default configuration " \
			"len %d, status %lX\n", dev->act_len, dev->status);
		return err;
	}
	debug("new device strings: Mfr=%d, Product=%d, SerialNumber=%d\n",
	      dev->descriptor.iManufacturer, dev->descriptor.iProduct,
	      dev->descriptor.iSerialNumber);
	memset(dev->mf, 0, sizeof(dev->mf));
	memset(dev->prod, 0, sizeof(dev->prod));
	memset(dev->serial, 0, sizeof(dev->serial));
	if (dev->descriptor.iManufacturer)
		usb_string(dev, dev->descriptor.iManufacturer,
			   dev->mf, sizeof(dev->mf));
	if (dev->descriptor.iProduct)
		usb_string(dev, dev->descriptor.iProduct,
			   dev->prod, sizeof(dev->prod));
	if (dev->descriptor.iSerialNumber)
		usb_string(dev, dev->descriptor.iSerialNumber,
			   dev->serial, sizeof(dev->serial));
	debug("Manufacturer %s\n", dev->mf);
	debug("Product      %s\n", dev->prod);
	debug("SerialNumber %s\n", dev->serial);

	return 0;
}

int usb_setup_device(struct usb_device *dev, bool do_read,
		     struct usb_device *parent)
{
	int addr;
	int ret;

	/* We still haven't set the Address yet */
	addr = dev->devnum;
	dev->devnum = 0;

	ret = usb_prepare_device(dev, addr, do_read, parent);
	if (ret)
		return ret;
	ret = usb_select_config(dev);

	return ret;
}

#ifndef CONFIG_DM_USB
/*
 * By the time we get here, the device has gotten a new device ID
 * and is in the default state. We need to identify the thing and
 * get the ball rolling..
 *
 * Returns 0 for success, != 0 for error.
 */
int usb_new_device(struct usb_device *dev)
{
	bool do_read = true;
	int err;

	/*
	 * XHCI needs to issue a Address device command to setup
	 * proper device context structures, before it can interact
	 * with the device. So a get_descriptor will fail before any
	 * of that is done for XHCI unlike EHCI.
	 */
#ifdef CONFIG_USB_XHCI
	do_read = false;
#endif
	err = usb_setup_device(dev, do_read, dev->parent);
	if (err)
		return err;

	/* Now probe if the device is a hub */
	err = usb_hub_probe(dev, 0);
	if (err < 0)
		return err;

	return 0;
}
#endif

__weak
int board_usb_init(int index, enum usb_init_type init)
{
	return 0;
}

__weak
int board_usb_cleanup(int index, enum usb_init_type init)
{
	return 0;
}

bool usb_device_has_child_on_port(struct usb_device *parent, int port)
{
#ifdef CONFIG_DM_USB
	return false;
#else
	return parent->children[port] != NULL;
#endif
}

/* EOF */