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| author | Andiry Xu <andiry.xu@amd.com> | 2011-05-05 18:13:58 +0800 |
|---|---|---|
| committer | Sarah Sharp <sarah.a.sharp@linux.intel.com> | 2011-05-09 09:34:47 -0700 |
| commit | 51eb01a746089f2c3d9b87f870353772d2fb4c37 (patch) | |
| tree | e844a557ef8f1f841969dabe1b88ee9429786079 /drivers/usb | |
| parent | b83cdc8f4d94a127e9319bef37f384b01ecca72e (diff) | |
| download | linux-51eb01a746089f2c3d9b87f870353772d2fb4c37.tar.gz linux-51eb01a746089f2c3d9b87f870353772d2fb4c37.tar.bz2 linux-51eb01a746089f2c3d9b87f870353772d2fb4c37.zip | |
xHCI 1.0: Control endpoint average TRB length field set
xHCI 1.0 specification indicates that software should set Average TRB Length
to '8' for control endpoints.
Signed-off-by: Andiry Xu <andiry.xu@amd.com>
Signed-off-by: Sarah Sharp <sarah.a.sharp@linux.intel.com>
Diffstat (limited to 'drivers/usb')
| -rw-r--r-- | drivers/usb/host/xhci-mem.c | 9 |
1 files changed, 8 insertions, 1 deletions
diff --git a/drivers/usb/host/xhci-mem.c b/drivers/usb/host/xhci-mem.c index a4fc4d929385..543833b9dbad 100644 --- a/drivers/usb/host/xhci-mem.c +++ b/drivers/usb/host/xhci-mem.c @@ -1246,8 +1246,15 @@ int xhci_endpoint_init(struct xhci_hcd *xhci, * including link TRBs, No-op TRBs, and Event data TRBs. Since we don't * use Event Data TRBs, and we don't chain in a link TRB on short * transfers, we're basically dividing by 1. + * + * xHCI 1.0 specification indicates that the Average TRB Length should + * be set to 8 for control endpoints. */ - ep_ctx->tx_info |= cpu_to_le32(AVG_TRB_LENGTH_FOR_EP(max_esit_payload)); + if (usb_endpoint_xfer_control(&ep->desc) && xhci->hci_version == 0x100) + ep_ctx->tx_info |= cpu_to_le32(AVG_TRB_LENGTH_FOR_EP(8)); + else + ep_ctx->tx_info |= + cpu_to_le32(AVG_TRB_LENGTH_FOR_EP(max_esit_payload)); /* FIXME Debug endpoint context */ return 0; |