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| author | Chunfeng Yun <chunfeng.yun@mediatek.com> | 2020-09-08 18:59:57 +0200 |
|---|---|---|
| committer | Marek Vasut <marex@denx.de> | 2020-10-01 19:43:05 +0200 |
| commit | 740820519c69d84b320199a8a4348e47c447ebfb (patch) | |
| tree | d4ff670cf458486494cfe083bd5c69d8225d8d1d /drivers/usb/host/xhci-ring.c | |
| parent | e3ea481bee1fbc8f090f46c38354838a64958af4 (diff) | |
| download | u-boot-740820519c69d84b320199a8a4348e47c447ebfb.zip u-boot-740820519c69d84b320199a8a4348e47c447ebfb.tar.gz u-boot-740820519c69d84b320199a8a4348e47c447ebfb.tar.bz2 | |
usb: xhci: add quirks flag to support MediaTek xHCI 0.96
There some vendor quirks for MTK xHCI 0.96 host controller:
1. It defines some extra SW scheduling parameters for HW
to minimize the scheduling effort for synchronous and
interrupt endpoints. The parameters are put into reserved
DWs of slot context and endpoint context.
2. Its TDS in Normal TRB defines a number of packets that
remains to be transferred for a TD after processing all
Max packets in all previous TRBs.
Signed-off-by: Chunfeng Yun <chunfeng.yun@mediatek.com>
Tested-by: Frank Wunderlich <frank-w@public-files.de>
Reviewed-by: Bin Meng <bmeng.cn@gmail.com>
Diffstat (limited to 'drivers/usb/host/xhci-ring.c')
| -rw-r--r-- | drivers/usb/host/xhci-ring.c | 9 |
1 files changed, 7 insertions, 2 deletions
diff --git a/drivers/usb/host/xhci-ring.c b/drivers/usb/host/xhci-ring.c index 603e0e5..3f915ae 100644 --- a/drivers/usb/host/xhci-ring.c +++ b/drivers/usb/host/xhci-ring.c @@ -332,7 +332,8 @@ static u32 xhci_td_remainder(struct xhci_ctrl *ctrl, int transferred, { u32 total_packet_count; - if (ctrl->hci_version < 0x100) + /* MTK xHCI 0.96 contains some features from 1.0 */ + if (ctrl->hci_version < 0x100 && !(ctrl->quirks & XHCI_MTK_HOST)) return ((td_total_len - transferred) >> 10); /* One TRB with a zero-length data packet. */ @@ -340,6 +341,10 @@ static u32 xhci_td_remainder(struct xhci_ctrl *ctrl, int transferred, trb_buff_len == td_total_len) return 0; + /* for MTK xHCI 0.96, TD size include this TRB, but not in 1.x */ + if ((ctrl->quirks & XHCI_MTK_HOST) && (ctrl->hci_version < 0x100)) + trb_buff_len = 0; + total_packet_count = DIV_ROUND_UP(td_total_len, maxp); /* Queueing functions don't count the current TRB into transferred */ @@ -823,7 +828,7 @@ int xhci_ctrl_tx(struct usb_device *udev, unsigned long pipe, field |= 0x1; /* xHCI 1.0 6.4.1.2.1: Transfer Type field */ - if (ctrl->hci_version >= 0x100) { + if (ctrl->hci_version >= 0x100 || ctrl->quirks & XHCI_MTK_HOST) { if (length > 0) { if (req->requesttype & USB_DIR_IN) field |= (TRB_DATA_IN << TRB_TX_TYPE_SHIFT); |