xiaomi-sm8450/android_kernel_xiaomi_sm8450
1
0
Fork 0
Code Issues Pull Requests Actions Packages Projects Releases Wiki Activity

xhci: mediatek: support MTK xHCI host controller

Browse Source 
There some vendor quirks for MTK xhci 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 reseved
  DWs of slot context and endpoint context.
2. Its IMODI unit for Interrupter Moderation register is
  8 times as much as that defined in xHCI spec.
3. 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: Daniel Thompson <daniel.thompson@linaro.org>
Reviewed-by: Daniel Thompson <daniel.thompson@linaro.org>
Signed-off-by: Mathias Nyman <mathias.nyman@linux.intel.com>
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
This commit is contained in:
Chunfeng Yun
2015-11-24 13:09:55 +02:00
committed by Greg Kroah-Hartman
parent c74732e3c5
commit 0cbd4b34cd
8 changed files with 1383 additions and 6 deletions
Download Patch File Download Diff File Expand all files Collapse all files

16
drivers/usb/host/xhci-ring.c
View File

@@ -68,6 +68,7 @@
#include <linux/slab.h>
#include "xhci.h"
#include "xhci-trace.h"
#include "xhci-mtk.h"
/*
* Returns zero if the TRB isn't in this segment, otherwise it returns the DMA
@@ -3074,17 +3075,22 @@ static u32 xhci_td_remainder(struct xhci_hcd *xhci, int transferred,
{
u32 maxp, total_packet_count;
if (xhci->hci_version < 0x100)
/* MTK xHCI is mostly 0.97 but contains some features from 1.0 */
if (xhci->hci_version < 0x100 && !(xhci->quirks & XHCI_MTK_HOST))
return ((td_total_len - transferred) >> 10);
maxp = GET_MAX_PACKET(usb_endpoint_maxp(&urb->ep->desc));
total_packet_count = DIV_ROUND_UP(td_total_len, maxp);
/* One TRB with a zero-length data packet. */
if (num_trbs_left == 0 || (transferred == 0 && trb_buff_len == 0) ||
trb_buff_len == td_total_len)
return 0;
/* for MTK xHCI, TD size doesn't include this TRB */
if (xhci->quirks & XHCI_MTK_HOST)
trb_buff_len = 0;
maxp = GET_MAX_PACKET(usb_endpoint_maxp(&urb->ep->desc));
total_packet_count = DIV_ROUND_UP(td_total_len, maxp);
/* Queueing functions don't count the current TRB into transferred */
return (total_packet_count - ((transferred + trb_buff_len) / maxp));
}
@@ -3472,7 +3478,7 @@ int xhci_queue_ctrl_tx(struct xhci_hcd *xhci, gfp_t mem_flags,
field |= 0x1;
/* xHCI 1.0/1.1 6.4.1.2.1: Transfer Type field */
if (xhci->hci_version >= 0x100) {
if ((xhci->hci_version >= 0x100) || (xhci->quirks & XHCI_MTK_HOST)) {
if (urb->transfer_buffer_length > 0) {
if (setup->bRequestType & USB_DIR_IN)
field |= TRB_TX_TYPE(TRB_DATA_IN);