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XHCI: Minor tweaks and other changes.

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* Cap fSlotCount at the hardware level, not just at the software
   level.
 * Clear interrupts in init routine.
 * Write high DMA address of DCBAAP.

Found by cross-comparing with DragonFlyBSD and OpenBSD.
This commit is contained in:
Augustin Cavalier 2019-02-18 10:05:04 -05:00
parent 6554cc220f
commit a881209f38
1 changed files with 5 additions and 1 deletions
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6
src/add-ons/kernel/busses/usb/xhci.cpp
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@ -403,6 +403,8 @@ XHCI::Start()
}
fSlotCount = HCS_MAX_SLOTS(capabilities);
if (fSlotCount > XHCI_MAX_DEVICES)
fSlotCount = XHCI_MAX_DEVICES;
WriteOpReg(XHCI_CONFIG, fSlotCount);
// find out which protocol is used for each port
@ -446,6 +448,8 @@ XHCI::Start()
fExitLatMax = HCS_U1_DEVICE_LATENCY(params3)
+ HCS_U2_DEVICE_LATENCY(params3);
// clear interrupts & disable device notifications
WriteOpReg(XHCI_STS, ReadOpReg(XHCI_STS));
WriteOpReg(XHCI_DNCTRL, 0);
// allocate Device Context Base Address array
@ -478,7 +482,7 @@ XHCI::Start()
TRACE("setting DCBAAP %" B_PRIxPHYSADDR "\n", dmaAddress);
WriteOpReg(XHCI_DCBAAP_LO, (uint32)dmaAddress);
WriteOpReg(XHCI_DCBAAP_HI, /*(uint32)(dmaAddress >> 32)*/0);
WriteOpReg(XHCI_DCBAAP_HI, (uint32)(dmaAddress >> 32));
// allocate Event Ring Segment Table
uint8 *addr;