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usb: pci: Add XHCI driver for PCI

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

Signed-off-by: Simon Glass <sjg@chromium.org>
Reviewed-by: Bin Meng <bmeng.cn@gmail.com>
This commit is contained in:
Simon Glass 2015-01-27 22:13:31 -07:00
parent 4fd46727e4
commit 316328f59d
2 changed files with 61 additions and 0 deletions
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1
drivers/usb/host/Makefile
View File

@ -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

60
drivers/usb/host/xhci-pci.c Normal file
View File

@ -0,0 +1,60 @@
/*
* Copyright (c) 2015, Google, Inc
* Written by Simon Glass <sjg@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)
{
}