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Commit 3b9c1c5b authored by Sebastian Andrzej Siewior's avatar Sebastian Andrzej Siewior Committed by Felipe Balbi
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usb: gadget: dummy_hcd: add support for USB_DT_BOS on rh 



Without a reply for USB_DT_BOS the USB3 mode does not work since
448b6eb1 ("USB: Make sure to fetch the BOS desc for roothubs.).

Cc: stable@vger.kernel.org #v3.5
Signed-off-by: default avatarSebastian Andrzej Siewior <sebastian@breakpoint.cc>
Signed-off-by: default avatarFelipe Balbi <balbi@ti.com>
parent 1b68a4ca

drivers/usb/gadget/dummy_hcd.c

+33 −0
Original line number Diff line number Diff line
@@ -1916,6 +1916,27 @@ done: 
	return retval;

}



/* usb 3.0 root hub device descriptor */

struct {

	struct usb_bos_descriptor bos;

	struct usb_ss_cap_descriptor ss_cap;

} __packed usb3_bos_desc = {



	.bos = {

		.bLength		= USB_DT_BOS_SIZE,

		.bDescriptorType	= USB_DT_BOS,

		.wTotalLength		= cpu_to_le16(sizeof(usb3_bos_desc)),

		.bNumDeviceCaps		= 1,

	},

	.ss_cap = {

		.bLength		= USB_DT_USB_SS_CAP_SIZE,

		.bDescriptorType	= USB_DT_DEVICE_CAPABILITY,

		.bDevCapabilityType	= USB_SS_CAP_TYPE,

		.wSpeedSupported	= cpu_to_le16(USB_5GBPS_OPERATION),

		.bFunctionalitySupport	= ilog2(USB_5GBPS_OPERATION),

	},

};



static inline void

ss_hub_descriptor(struct usb_hub_descriptor *desc)

{
@@ -2006,6 +2027,18 @@ static int dummy_hub_control( 
		else

			hub_descriptor((struct usb_hub_descriptor *) buf);

		break;



	case DeviceRequest | USB_REQ_GET_DESCRIPTOR:

		if (hcd->speed != HCD_USB3)

			goto error;



		if ((wValue >> 8) != USB_DT_BOS)

			goto error;



		memcpy(buf, &usb3_bos_desc, sizeof(usb3_bos_desc));

		retval = sizeof(usb3_bos_desc);

		break;



	case GetHubStatus:

		*(__le32 *) buf = cpu_to_le32(0);

		break;