[U-Boot] [PATCH 06/23] usb: pci: Add XHCI driver for PCI

[Bin Meng]

On Tue, Jan 27, 2015 at 9:23 AM, Simon Glass <sjg at chromium.org> wrote:
> Add a driver which locates the available XHCI controllers on the PCI bus
> and makes them available.
>
> Signed-off-by: Simon Glass <sjg at 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 <sjg at 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)
> +{
> +}
> --

Reviewed-by: Bin Meng <bmeng.cn at gmail.com>