diff options
Diffstat (limited to 'drivers/usb/core/config.c')
| -rw-r--r-- | drivers/usb/core/config.c | 51 |
1 files changed, 46 insertions, 5 deletions
diff --git a/drivers/usb/core/config.c b/drivers/usb/core/config.c index f7bf8d1de3ad..13bd4ec4ea5f 100644 --- a/drivers/usb/core/config.c +++ b/drivers/usb/core/config.c @@ -64,6 +64,37 @@ static void usb_parse_ssp_isoc_endpoint_companion(struct device *ddev, memcpy(&ep->ssp_isoc_ep_comp, desc, USB_DT_SSP_ISOC_EP_COMP_SIZE); } +static void usb_parse_eusb2_isoc_endpoint_companion(struct device *ddev, + int cfgno, int inum, int asnum, struct usb_host_endpoint *ep, + unsigned char *buffer, int size) +{ + struct usb_eusb2_isoc_ep_comp_descriptor *desc; + struct usb_descriptor_header *h; + + /* + * eUSB2 isochronous endpoint companion descriptor for this endpoint + * shall be declared before the next endpoint or interface descriptor + */ + while (size >= USB_DT_EUSB2_ISOC_EP_COMP_SIZE) { + h = (struct usb_descriptor_header *)buffer; + + if (h->bDescriptorType == USB_DT_EUSB2_ISOC_ENDPOINT_COMP) { + desc = (struct usb_eusb2_isoc_ep_comp_descriptor *)buffer; + ep->eusb2_isoc_ep_comp = *desc; + return; + } + if (h->bDescriptorType == USB_DT_ENDPOINT || + h->bDescriptorType == USB_DT_INTERFACE) + break; + + buffer += h->bLength; + size -= h->bLength; + } + + dev_notice(ddev, "No eUSB2 isoc ep %d companion for config %d interface %d altsetting %d\n", + ep->desc.bEndpointAddress, cfgno, inum, asnum); +} + static void usb_parse_ss_endpoint_companion(struct device *ddev, int cfgno, int inum, int asnum, struct usb_host_endpoint *ep, unsigned char *buffer, int size) @@ -258,8 +289,10 @@ static int usb_parse_endpoint(struct device *ddev, int cfgno, int n, i, j, retval; unsigned int maxp; const unsigned short *maxpacket_maxes; + u16 bcdUSB; d = (struct usb_endpoint_descriptor *) buffer; + bcdUSB = le16_to_cpu(udev->descriptor.bcdUSB); buffer += d->bLength; size -= d->bLength; @@ -409,15 +442,17 @@ static int usb_parse_endpoint(struct device *ddev, int cfgno, /* * Validate the wMaxPacketSize field. - * Some devices have isochronous endpoints in altsetting 0; - * the USB-2 spec requires such endpoints to have wMaxPacketSize = 0 - * (see the end of section 5.6.3), so don't warn about them. + * eUSB2 devices (see USB 2.0 Double Isochronous IN ECN 9.6.6 Endpoint) + * and devices with isochronous endpoints in altsetting 0 (see USB 2.0 + * end of section 5.6.3) have wMaxPacketSize = 0. + * So don't warn about those. */ maxp = le16_to_cpu(endpoint->desc.wMaxPacketSize); - if (maxp == 0 && !(usb_endpoint_xfer_isoc(d) && asnum == 0)) { + + if (maxp == 0 && bcdUSB != 0x0220 && + !(usb_endpoint_xfer_isoc(d) && asnum == 0)) dev_notice(ddev, "config %d interface %d altsetting %d endpoint 0x%X has invalid wMaxPacketSize 0\n", cfgno, inum, asnum, d->bEndpointAddress); - } /* Find the highest legal maxpacket size for this endpoint */ i = 0; /* additional transactions per microframe */ @@ -465,6 +500,12 @@ static int usb_parse_endpoint(struct device *ddev, int cfgno, maxp); } + /* Parse a possible eUSB2 periodic endpoint companion descriptor */ + if (bcdUSB == 0x0220 && d->wMaxPacketSize == 0 && + (usb_endpoint_xfer_isoc(d) || usb_endpoint_xfer_int(d))) + usb_parse_eusb2_isoc_endpoint_companion(ddev, cfgno, inum, asnum, + endpoint, buffer, size); + /* Parse a possible SuperSpeed endpoint companion descriptor */ if (udev->speed >= USB_SPEED_SUPER) usb_parse_ss_endpoint_companion(ddev, cfgno, |