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: Huang Rui <ray.huang@xxxxxxx>
Acked-by: Alan Stern <stern@xxxxxxxxxxxxxxxxxxx>
---
drivers/usb/misc/usbtest.c | 37 +++++++++++++++++++++++++++++++++++++
1 file changed, 37 insertions(+)
diff --git a/drivers/usb/misc/usbtest.c b/drivers/usb/misc/usbtest.c
index 84d491d..d589d3c 100644
--- a/drivers/usb/misc/usbtest.c
+++ b/drivers/usb/misc/usbtest.c
@@ -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;
}
--
1.7.11.7
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