Add a driver which locates the available XHCI controllers on the PCI bus
and makes them available.

Signed-off-by: Simon Glass <s...@chromium.org>
---

 drivers/usb/host/Makefile   |  1 +
 drivers/usb/host/xhci-pci.c | 60 +++++++++++++++++++++++++++++++++++++++++++++
 2 files changed, 61 insertions(+)
 create mode 100644 drivers/usb/host/xhci-pci.c

diff --git a/drivers/usb/host/Makefile b/drivers/usb/host/Makefile
index c11b551..66d6e9a 100644
--- a/drivers/usb/host/Makefile
+++ b/drivers/usb/host/Makefile
@@ -47,6 +47,7 @@ obj-$(CONFIG_USB_XHCI) += xhci.o xhci-mem.o xhci-ring.o
 obj-$(CONFIG_USB_XHCI_KEYSTONE) += xhci-keystone.o
 obj-$(CONFIG_USB_XHCI_EXYNOS) += xhci-exynos5.o
 obj-$(CONFIG_USB_XHCI_OMAP) += xhci-omap.o
+obj-$(CONFIG_USB_XHCI_PCI) += xhci-pci.o
 
 # designware
 obj-$(CONFIG_USB_DWC2) += dwc2.o
diff --git a/drivers/usb/host/xhci-pci.c b/drivers/usb/host/xhci-pci.c
new file mode 100644
index 0000000..361fcce
--- /dev/null
+++ b/drivers/usb/host/xhci-pci.c
@@ -0,0 +1,60 @@
+/*
+ * Copyright (c) 2015, Google, Inc
+ * Written by Simon Glass <s...@chromium.org>
+ * All rights reserved.
+ *
+ * SPDX-License-Identifier:    GPL-2.0
+ */
+
+#include <common.h>
+#include <errno.h>
+#include <pci.h>
+#include <usb.h>
+
+#include "xhci.h"
+
+/*
+ * Create the appropriate control structures to manage a new XHCI host
+ * controller.
+ */
+int xhci_hcd_init(int index, struct xhci_hccr **ret_hccr,
+                 struct xhci_hcor **ret_hcor)
+{
+       struct xhci_hccr *hccr;
+       struct xhci_hcor *hcor;
+       pci_dev_t pdev;
+       uint32_t cmd;
+       int len;
+
+       pdev = pci_find_class(PCI_CLASS_SERIAL_USB_XHCI, index);
+       if (pdev < 0) {
+               printf("XHCI host controller not found\n");
+               return -1;
+       }
+
+       hccr = (struct xhci_hccr *)pci_map_bar(pdev,
+                       PCI_BASE_ADDRESS_0, PCI_REGION_MEM);
+       len = HC_LENGTH(xhci_readl(&hccr->cr_capbase));
+       hcor = (struct xhci_hcor *)((uint32_t)hccr + len);
+
+       debug("XHCI-PCI init hccr 0x%x and hcor 0x%x hc_length %d\n",
+             (uint32_t)hccr, (uint32_t)hcor, len);
+
+       *ret_hccr = hccr;
+       *ret_hcor = hcor;
+
+       /* enable busmaster */
+       pci_read_config_dword(pdev, PCI_COMMAND, &cmd);
+       cmd |= PCI_COMMAND_MASTER;
+       pci_write_config_dword(pdev, PCI_COMMAND, cmd);
+
+       return 0;
+}
+
+/*
+ * Destroy the appropriate control structures corresponding * to the XHCI host
+ * controller
+ */
+void xhci_hcd_stop(int index)
+{
+}
-- 
2.2.0.rc0.207.ga3a616c

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