diff options
Diffstat (limited to 'drivers/usb/host/xhci-mem.c')
| -rw-r--r-- | drivers/usb/host/xhci-mem.c | 21 |
1 files changed, 21 insertions, 0 deletions
diff --git a/drivers/usb/host/xhci-mem.c b/drivers/usb/host/xhci-mem.c index 7cf15ca854b..be5a05b2021 100644 --- a/drivers/usb/host/xhci-mem.c +++ b/drivers/usb/host/xhci-mem.c @@ -220,6 +220,12 @@ void xhci_mem_cleanup(struct xhci_hcd *xhci) dma_pool_destroy(xhci->segment_pool); xhci->segment_pool = NULL; xhci_dbg(xhci, "Freed segment pool\n"); + xhci_writel(xhci, 0, &xhci->op_regs->dcbaa_ptr[1]); + xhci_writel(xhci, 0, &xhci->op_regs->dcbaa_ptr[0]); + if (xhci->dcbaa) + pci_free_consistent(pdev, sizeof(*xhci->dcbaa), + xhci->dcbaa, xhci->dcbaa->dma); + xhci->dcbaa = NULL; xhci->page_size = 0; xhci->page_shift = 0; } @@ -263,6 +269,21 @@ int xhci_mem_init(struct xhci_hcd *xhci, gfp_t flags) xhci_writel(xhci, val, &xhci->op_regs->config_reg); /* + * Section 5.4.8 - doorbell array must be + * "physically contiguous and 64-byte (cache line) aligned". + */ + xhci->dcbaa = pci_alloc_consistent(to_pci_dev(dev), + sizeof(*xhci->dcbaa), &dma); + if (!xhci->dcbaa) + goto fail; + memset(xhci->dcbaa, 0, sizeof *(xhci->dcbaa)); + xhci->dcbaa->dma = dma; + xhci_dbg(xhci, "// Setting device context base array address to 0x%x\n", + xhci->dcbaa->dma); + xhci_writel(xhci, (u32) 0, &xhci->op_regs->dcbaa_ptr[1]); + xhci_writel(xhci, dma, &xhci->op_regs->dcbaa_ptr[0]); + + /* * Initialize the ring segment pool. The ring must be a contiguous * structure comprised of TRBs. The TRBs must be 16 byte aligned, * however, the command ring segment needs 64-byte aligned segments, |