diff options
Diffstat (limited to 'payloads/libpayload/drivers/usb/xhci.c')
| -rw-r--r-- | payloads/libpayload/drivers/usb/xhci.c | 17 |
1 files changed, 16 insertions, 1 deletions
diff --git a/payloads/libpayload/drivers/usb/xhci.c b/payloads/libpayload/drivers/usb/xhci.c index 26dcdbe4de..89930e06df 100644 --- a/payloads/libpayload/drivers/usb/xhci.c +++ b/payloads/libpayload/drivers/usb/xhci.c @@ -370,6 +370,8 @@ xhci_reinit (hci_t *controller) xhci->ev_ring_table[0].seg_base_hi = 0; xhci->ev_ring_table[0].seg_size = EVENT_RING_SIZE; + /* pass event ring table to hardware */ + wmb(); /* Initialize primary interrupter */ xhci->hcrreg->intrrs[0].erstsz = 1; xhci_update_event_dq(xhci); @@ -510,6 +512,7 @@ xhci_enqueue_trb(transfer_ring_t *const tr) xhci_spew("Handling LINK pointer\n"); const int tc = TRB_GET(TC, tr->cur); TRB_SET(CH, tr->cur, chain); + wmb(); TRB_SET(C, tr->cur, tr->pcs); tr->cur = phys_to_virt(tr->cur->ptr_low); if (tc) @@ -535,7 +538,7 @@ xhci_enqueue_td(transfer_ring_t *const tr, const int ep, const size_t mps, cur_length = length; packets = 0; length = 0; - } else { + } else if (!IS_ENABLED(CONFIG_LP_XHCI_MTK_QUIRK)) { packets -= (residue + cur_length) / mps; residue = (residue + cur_length) % mps; length -= cur_length; @@ -548,6 +551,18 @@ xhci_enqueue_td(transfer_ring_t *const tr, const int ep, const size_t mps, TRB_SET(TDS, trb, MIN(TRB_MAX_TD_SIZE, packets)); TRB_SET(CH, trb, 1); + if (length && IS_ENABLED(CONFIG_LP_XHCI_MTK_QUIRK)) { + /* + * For MTK's xHCI controller, TDS defines a number of + * packets that remain to be transferred for a TD after + * processing all Max packets in all previous TRBs, that + * means don't include the current TRB's. + */ + packets -= (residue + cur_length) / mps; + residue = (residue + cur_length) % mps; + length -= cur_length; + } + /* Check for first, data stage TRB */ if (!trb_count && ep == 1) { TRB_SET(DIR, trb, dir); |