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/*
* This file is part of the coreboot project.
*
* Copyright (C) 2008 Arastra, Inc.
*
* This program is free software; you can redistribute it and/or modify
* it under the terms of the GNU General Public License version 2 as
* published by the Free Software Foundation.
*
* This program is distributed in the hope that it will be useful,
* but WITHOUT ANY WARRANTY; without even the implied warranty of
* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
* GNU General Public License for more details.
*
* You should have received a copy of the GNU General Public License
* along with this program; if not, write to the Free Software
* Foundation, Inc.
*
*/
#include <console/console.h>
#include <device/device.h>
#include <device/pci.h>
#include "i3100.h"
void i3100_enable(device_t dev)
{
device_t lpc_dev;
u8 func;
volatile u32 *disable;
if (dev->enabled)
return;
/*
* To disable an integrated southbridge device, set the corresponding
* flag in the Function Disable register.
*/
/* Temporarily enable the root complex register block at 0xa0000000. */
lpc_dev = dev_find_slot(0x0, PCI_DEVFN(0x1f, 0x0));
pci_write_config32(lpc_dev, 0xf0, 0xa0000000 | (1 << 0));
disable = (volatile u32 *) 0xa0003418;
func = PCI_FUNC(dev->path.pci.devfn);
switch (PCI_SLOT(dev->path.pci.devfn)) {
case 0x1f: /* LPC (fn0), SATA (fn2), SMBus (fn3) */
*disable |= (1 << (func == 0x0 ? 14 : func));
break;
case 0x1d: /* UHCI (fn0, fn1), EHCI (fn7) */
*disable |= (1 << (func + 8));
break;
case 0x1c: /* PCIe ports B0-B3 (fn0-fn3) */
*disable |= (1 << (func + 16));
break;
}
/* Disable the root complex register block. */
pci_write_config32(lpc_dev, 0xf0, 0);
}
struct chip_operations southbridge_intel_i3100_ops = {
CHIP_NAME("Intel 3100 Southbridge")
};
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