diff options
| author | Mathias Nyman <mathias.nyman@linux.intel.com> | 2016-02-12 16:40:16 +0200 |
|---|---|---|
| committer | Greg Kroah-Hartman <gregkh@linuxfoundation.org> | 2016-02-14 17:03:23 -0800 |
| commit | 8ef8a9f5c148ae1dbeae926e5b6129e396faded2 (patch) | |
| tree | b4ef5dbf8f0d7736c584e3c9f32ddfe0e3ee4963 /drivers/usb/host/xhci-mem.c | |
| parent | def4e6f7b419c4092c82222d0896d6c409692326 (diff) | |
| download | linux-8ef8a9f5c148ae1dbeae926e5b6129e396faded2.tar.bz2 | |
xhci: Add SuperSpeedPlus high bandwidth isoc support to xhci endpoints
SuperSpeedPlus doubled the number of transactions per service interval
the isoc endpoints supports.
To support this, xhci 1.1 added Large ESIT Capability (LEC), which
takes into use new bits in the endpoint context to fit the parameters.
If xhci supports LEC, and the device has a SuperSpeedPlus Isoc companion
descriptor then take into use the high bits of max esit payload, and
skip calculating the Mult field as it wouldn't fit. LEC capable
host will calculate the Mult based on other paramenters.
Signed-off-by: Mathias Nyman <mathias.nyman@linux.intel.com>
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
Diffstat (limited to 'drivers/usb/host/xhci-mem.c')
| -rw-r--r-- | drivers/usb/host/xhci-mem.c | 13 |
1 files changed, 11 insertions, 2 deletions
diff --git a/drivers/usb/host/xhci-mem.c b/drivers/usb/host/xhci-mem.c index 4e3abdd0ec36..80c1de239e9a 100644 --- a/drivers/usb/host/xhci-mem.c +++ b/drivers/usb/host/xhci-mem.c @@ -1390,7 +1390,12 @@ static u32 xhci_get_max_esit_payload(struct usb_device *udev, usb_endpoint_xfer_bulk(&ep->desc)) return 0; - if (udev->speed >= USB_SPEED_SUPER) + /* SuperSpeedPlus Isoc ep sending over 48k per esit */ + if ((udev->speed >= USB_SPEED_SUPER_PLUS) && + USB_SS_SSP_ISOC_COMP(ep->ss_ep_comp.bmAttributes)) + return le32_to_cpu(ep->ssp_isoc_ep_comp.dwBytesPerInterval); + /* SuperSpeed or SuperSpeedPlus Isoc ep with less than 48k per esit */ + else if (udev->speed >= USB_SPEED_SUPER) return le16_to_cpu(ep->ss_ep_comp.wBytesPerInterval); max_packet = GET_MAX_PACKET(usb_endpoint_maxp(&ep->desc)); @@ -1470,9 +1475,13 @@ int xhci_endpoint_init(struct xhci_hcd *xhci, /* xHCI 1.0 and 1.1 indicates that ctrl ep avg TRB Length should be 8 */ if (usb_endpoint_xfer_control(&ep->desc) && xhci->hci_version >= 0x100) avg_trb_len = 8; + /* xhci 1.1 with LEC support doesn't use mult field, use RsvdZ */ + if ((xhci->hci_version > 0x100) && HCC2_LEC(xhci->hcc_params2)) + mult = 0; /* Fill the endpoint context */ - ep_ctx->ep_info = cpu_to_le32(EP_INTERVAL(interval) | + ep_ctx->ep_info = cpu_to_le32(EP_MAX_ESIT_PAYLOAD_HI(max_esit_payload) | + EP_INTERVAL(interval) | EP_MULT(mult)); ep_ctx->ep_info2 = cpu_to_le32(EP_TYPE(endpoint_type) | MAX_PACKET(max_packet) | |