In Test 9 of usbtest module, it is used for performing chapter 9 tests N
times.
USB2.0 Extension descriptor is one of the generic device-level capbility
descriptors which added in section 9.6.2.1 of USB 3.0 spec.
This patch adds to support getting usb2.0 extension descriptor test
scenario for USB 3.0.
Signed-off-by: Huang Rui <ray.huang@xxxxxxx>
---
drivers/usb/misc/usbtest.c | 77 ++++++++++++++++++++++++++++++++++++++++++++++
1 file changed, 77 insertions(+)
diff --git a/drivers/usb/misc/usbtest.c b/drivers/usb/misc/usbtest.c
index 38ebe1d..d9ac215 100644
--- a/drivers/usb/misc/usbtest.c
+++ b/drivers/usb/misc/usbtest.c
@@ -606,6 +606,28 @@ static int is_good_config(struct usbtest_dev *tdev, int len)
return 0;
}
+static int is_good_ext(struct usbtest_dev *tdev, char *buf)
+{
+ struct usb_ext_cap_descriptor *ext;
+ u32 attr;
+
+ ext = (struct usb_ext_cap_descriptor *) buf;
+
+ if (ext->bLength != USB_DT_USB_EXT_CAP_SIZE) {
+ ERROR(tdev, "bogus usb 2.0 extension descriptor length\n");
+ return 0;
+ }
+
+ attr = le32_to_cpu(ext->bmAttributes);
+ /* bits[1:4] is used and others are reserved */
+ if (attr & ~0x1e) { /* reserved == 0 */
+ ERROR(tdev, "reserved bits set\n");
+ return 0;
+ }
+
+ return 1;
+}
+
/* sanity test for standard requests working with usb_control_mesg() and some
* of the utility functions which use it.
*
@@ -694,12 +716,67 @@ static int ch9_postconfig(struct usbtest_dev *dev)
* 3.0 spec
*/
if (le16_to_cpu(udev->descriptor.bcdUSB) >= 0x0300) {
+ struct usb_bos_descriptor *bos = NULL;
+ struct usb_dev_cap_header *header = NULL;
+ unsigned total, num, length;
+ char *buf;
+
retval = usb_get_descriptor(udev, USB_DT_BOS, 0, dev->buf,
sizeof(*udev->bos->desc));
if (retval != sizeof(*udev->bos->desc)) {
dev_err(&iface->dev, "bos descriptor --> %d\n", retval);
return (retval < 0) ? retval : -EDOM;
}
+
+ bos = (struct usb_bos_descriptor *)dev->buf;
+ total = le16_to_cpu(bos->wTotalLength);
+ num = bos->bNumDeviceCaps;
+
+ if (total > TBUF_SIZE)
+ total = TBUF_SIZE;
+
+ /*
+ * get generic device-level capability descriptors [9.6.2]
+ * in USB 3.0 spec
+ */
+ retval = usb_get_descriptor(udev, USB_DT_BOS, 0, dev->buf,
+ total);
+ if (retval != total) {
+ dev_err(&iface->dev, "bos descriptor set --> %d\n",
+ retval);
+ return (retval < 0) ? retval : -EDOM;
+ }
+
+ length = sizeof(*udev->bos->desc);
+ buf = (char *)dev->buf;
+ for (i = 0; i < num; i++) {
+ buf += length;
+ if (buf + sizeof(struct usb_dev_cap_header) >
+ dev->buf + total)
+ break;
+
+ header = (struct usb_dev_cap_header *)buf;
+ length = header->bLength;
+
+ if (header->bDescriptorType !=
+ USB_DT_DEVICE_CAPABILITY) {
+ dev_warn(&udev->dev, "not device capability descriptor, skip\n");
+ continue;
+ }
+
+ switch (header->bDevCapabilityType) {
+ case USB_CAP_TYPE_EXT:
+ if (buf + USB_DT_USB_EXT_CAP_SIZE >
+ dev->buf + total ||
+ !is_good_ext(dev, buf)) {
+ dev_err(&iface->dev, "bogus usb 2.0 extension descriptor\n");
+ return -EDOM;
+ }
+ break;
+ default:
+ break;
+ }
+ }
}
/* there's always [9.4.3] at least one config descriptor [9.6.3] */
--
1.7.11.7
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