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/*
* This file is part of the coreboot project.
*
* Copyright (C) 2010 Advanced Micro Devices, Inc.
*
* This program is free software; you can redistribute it and/or modify
* it under the terms of the GNU General Public License as published by
* the Free Software Foundation; version 2 of the License.
*
* 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.
*/
#include <console/console.h>
#include <device/device.h>
#include <device/pci.h>
#include <device/pci_ids.h>
#include <device/pci_ops.h>
#include "rs780.h"
/* for UMA internal graphics */
void avoid_lpc_dma_deadlock(device_t nb_dev, device_t sb_dev)
{
device_t cpu_f0;
u8 reg;
cpu_f0 = dev_find_slot(0, PCI_DEVFN(0x18, 0));
set_nbcfg_enable_bits(cpu_f0, 0x68, 3 << 21, 1 << 21);
reg = nbpcie_p_read_index(sb_dev, 0x10);
reg |= 0x100; /* bit9=1 */
nbpcie_p_write_index(sb_dev, 0x10, reg);
reg = nbpcie_p_read_index(nb_dev, 0x10);
reg |= 0x100; /* bit9=1 */
nbpcie_p_write_index(nb_dev, 0x10, reg);
/* Enable NP protocol over PCIE for memory-mapped writes targeting LPC
* Set this bit to avoid a deadlock condition. */
reg = htiu_read_index(nb_dev, 0x6);
reg |= 0x1000000; /* bit26 */
htiu_write_index(nb_dev, 0x6, reg);
}
static void pcie_init(struct device *dev)
{
/* Enable pci error detecting */
u32 dword;
printk(BIOS_INFO, "pcie_init in rs780_ht.c\n");
/* System error enable */
dword = pci_read_config32(dev, 0x04);
dword |= (1 << 8); /* System error enable */
dword |= (1 << 30); /* Clear possible errors */
pci_write_config32(dev, 0x04, dword);
/*
* 1 is APIC enable
* 18 is enable nb to accept A4 interrupt request from SB.
*/
dword = pci_read_config32(dev, 0x4C);
dword |= 1 << 1 | 1 << 18; /* Clear possible errors */
pci_write_config32(dev, 0x4C, dword);
}
static struct pci_operations lops_pci = {
.set_subsystem = pci_dev_set_subsystem,
};
static struct device_operations ht_ops = {
.read_resources = pci_dev_read_resources,
.set_resources = pci_dev_set_resources,
.enable_resources = pci_dev_enable_resources,
.init = pcie_init,
.scan_bus = 0,
.ops_pci = &lops_pci,
};
static const struct pci_driver ht_driver __pci_driver = {
.ops = &ht_ops,
.vendor = PCI_VENDOR_ID_AMD,
.device = PCI_DEVICE_ID_AMD_RS780_HT,
};
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