diff options
Diffstat (limited to 'drivers/usb/host')
| -rw-r--r-- | drivers/usb/host/xhci-hub.c | 34 |
1 files changed, 34 insertions, 0 deletions
diff --git a/drivers/usb/host/xhci-hub.c b/drivers/usb/host/xhci-hub.c index 9f844d45c66..2f74eddbe3c 100644 --- a/drivers/usb/host/xhci-hub.c +++ b/drivers/usb/host/xhci-hub.c @@ -28,6 +28,25 @@ #define PORT_RWC_BITS (PORT_CSC | PORT_PEC | PORT_WRC | PORT_OCC | \ PORT_RC | PORT_PLC | PORT_PE) +/* usb 1.1 root hub device descriptor */ +static u8 usb_bos_descriptor [] = { + USB_DT_BOS_SIZE, /* __u8 bLength, 5 bytes */ + USB_DT_BOS, /* __u8 bDescriptorType */ + 0x0F, 0x00, /* __le16 wTotalLength, 15 bytes */ + 0x1, /* __u8 bNumDeviceCaps */ + /* First device capability */ + USB_DT_USB_SS_CAP_SIZE, /* __u8 bLength, 10 bytes */ + USB_DT_DEVICE_CAPABILITY, /* Device Capability */ + USB_SS_CAP_TYPE, /* bDevCapabilityType, SUPERSPEED_USB */ + 0x00, /* bmAttributes, LTM off by default */ + USB_5GBPS_OPERATION, 0x00, /* wSpeedsSupported, 5Gbps only */ + 0x03, /* bFunctionalitySupport, + USB 3.0 speed only */ + 0x00, /* bU1DevExitLat, set later. */ + 0x00, 0x00 /* __le16 bU2DevExitLat, set later. */ +}; + + static void xhci_common_hub_descriptor(struct xhci_hcd *xhci, struct usb_hub_descriptor *desc, int ports) { @@ -455,6 +474,21 @@ int xhci_hub_control(struct usb_hcd *hcd, u16 typeReq, u16 wValue, xhci_hub_descriptor(hcd, xhci, (struct usb_hub_descriptor *) buf); break; + case DeviceRequest | USB_REQ_GET_DESCRIPTOR: + if ((wValue & 0xff00) != (USB_DT_BOS << 8)) + goto error; + + if (hcd->speed != HCD_USB3) + goto error; + + memcpy(buf, &usb_bos_descriptor, + USB_DT_BOS_SIZE + USB_DT_USB_SS_CAP_SIZE); + temp = xhci_readl(xhci, &xhci->cap_regs->hcs_params3); + buf[12] = HCS_U1_LATENCY(temp); + put_unaligned_le16(HCS_U2_LATENCY(temp), &buf[13]); + + spin_unlock_irqrestore(&xhci->lock, flags); + return USB_DT_BOS_SIZE + USB_DT_USB_SS_CAP_SIZE; case GetPortStatus: if (!wIndex || wIndex > max_ports) goto error; |