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Commit b8fef795 authored by Huang Rui's avatar Huang Rui Committed by Greg Kroah-Hartman
Browse files

usb: usbtest: support superspeed device capbility descriptor test 



In Test 9 of usbtest module, it is used for performing chapter 9 tests N
times.

SuperSpeed USB Device Capability descriptor is one of the generic
device-level capbility descriptors which added in section 9.6.2.2 of USB
3.0 spec.

This patch adds to support getting SuperSpeed USB Device Capability
descriptor test scenario for USB 3.0.

Signed-off-by: default avatarHuang Rui <ray.huang@amd.com>
Acked-by: default avatarAlan Stern <stern@rowland.harvard.edu>
Signed-off-by: default avatarGreg Kroah-Hartman <gregkh@linuxfoundation.org>
parent 82f92672

drivers/usb/misc/usbtest.c

+37 −0
Original line number Diff line number Diff line
@@ -628,6 +628,35 @@ static int is_good_ext(struct usbtest_dev *tdev, u8 *buf) 
	return 1;

}



static int is_good_ss_cap(struct usbtest_dev *tdev, u8 *buf)

{

	struct usb_ss_cap_descriptor *ss;



	ss = (struct usb_ss_cap_descriptor *) buf;



	if (ss->bLength != USB_DT_USB_SS_CAP_SIZE) {

		ERROR(tdev, "bogus superspeed device capability descriptor length\n");

		return 0;

	}



	/*

	 * only bit[1] of bmAttributes is used for LTM and others are

	 * reserved

	 */

	if (ss->bmAttributes & ~0x02) {	/* reserved == 0 */

		ERROR(tdev, "reserved bits set in bmAttributes\n");

		return 0;

	}



	/* bits[0:3] of wSpeedSupported is used and others are reserved */

	if (le16_to_cpu(ss->wSpeedSupported) & ~0x0f) {	/* reserved == 0 */

		ERROR(tdev, "reserved bits set in wSpeedSupported\n");

		return 0;

	}



	return 1;

}



/* sanity test for standard requests working with usb_control_mesg() and some

 * of the utility functions which use it.

 *
@@ -773,6 +802,14 @@ static int ch9_postconfig(struct usbtest_dev *dev) 
					return -EDOM;

				}

				break;

			case USB_SS_CAP_TYPE:

				if (buf + USB_DT_USB_SS_CAP_SIZE >

						dev->buf + total ||

						!is_good_ss_cap(dev, buf)) {

					dev_err(&iface->dev, "bogus superspeed device capability descriptor\n");

					return -EDOM;

				}

				break;

			default:

				break;

			}