u-boot/arch/x86/cpu/ivybridge/usb_xhci.c
Simon Glass a6d4c45306 x86: ivybridge: Set up XHCI USB
Add init for XHCI so that high-speed USB can be used.

Signed-off-by: Simon Glass <sjg@chromium.org>
2014-11-25 06:34:02 -07:00

32 lines
679 B
C

/*
* From Coreboot
* Copyright (C) 2008-2009 coresystems GmbH
*
* SPDX-License-Identifier: GPL-2.0
*/
#include <common.h>
#include <asm/pci.h>
#include <asm/arch/pch.h>
void bd82x6x_usb_xhci_init(pci_dev_t dev)
{
u32 reg32;
debug("XHCI: Setting up controller.. ");
/* lock overcurrent map */
reg32 = pci_read_config32(dev, 0x44);
reg32 |= 1;
pci_write_config32(dev, 0x44, reg32);
/* Enable clock gating */
reg32 = pci_read_config32(dev, 0x40);
reg32 &= ~((1 << 20) | (1 << 21));
reg32 |= (1 << 19) | (1 << 18) | (1 << 17);
reg32 |= (1 << 10) | (1 << 9) | (1 << 8);
reg32 |= (1 << 31); /* lock */
pci_write_config32(dev, 0x40, reg32);
debug("done.\n");
}