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xHCI 1.0: Setup Stage TRB Transfer Type flag

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Setup Stage Transfer Type field is added to indicate the presence and the
direction of the Data Stage TD, and determines the direction of the Status
Stage TD so the wLength length field should be ignored by the xHC.

Signed-off-by: Andiry Xu <andiry.xu@amd.com>
Signed-off-by: Sarah Sharp <sarah.a.sharp@linux.intel.com>
This commit is contained in:
Andiry Xu 2011-05-05 18:13:56 +08:00 committed by Sarah Sharp
parent 04aebcbb1b
commit b83cdc8f4d
2 changed files with 14 additions and 0 deletions
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11
drivers/usb/host/xhci-ring.c
View File

@ -3053,6 +3053,17 @@ int xhci_queue_ctrl_tx(struct xhci_hcd *xhci, gfp_t mem_flags,
field |= TRB_IDT | TRB_TYPE(TRB_SETUP);
if (start_cycle == 0)
field |= 0x1;
/* xHCI 1.0 6.4.1.2.1: Transfer Type field */
if (xhci->hci_version == 0x100) {
if (urb->transfer_buffer_length > 0) {
if (setup->bRequestType & USB_DIR_IN)
field |= TRB_TX_TYPE(TRB_DATA_IN);
else
field |= TRB_TX_TYPE(TRB_DATA_OUT);
}
}
queue_trb(xhci, ep_ring, false, true,
setup->bRequestType | setup->bRequest << 8 | le16_to_cpu(setup->wValue) << 16,
le16_to_cpu(setup->wIndex) | le16_to_cpu(setup->wLength) << 16,

3
drivers/usb/host/xhci.h
View File

@ -967,6 +967,9 @@ struct xhci_event_cmd {
/* Control transfer TRB specific fields */
#define TRB_DIR_IN (1<<16)
#define TRB_TX_TYPE(p) ((p) << 16)
#define TRB_DATA_OUT 2
#define TRB_DATA_IN 3
/* Isochronous TRB specific fields */
#define TRB_SIA (1<<31)