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/*
* This file is part of the coreboot project.
*
* Copyright (C) 2016 Damien Zammit <damien@zamaudio.com>
*
* 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 <stdint.h>
#include <stddef.h>
#include <string.h>
#include <arch/io.h>
#include <device/pci_def.h>
#include <device/pnp_def.h>
#include <console/console.h>
#include "iomap.h"
#include "x4x.h"
#define DEFAULT_RCBA 0xfed1c000
#define RCBA8(x) *((volatile u8 *)(DEFAULT_RCBA + x))
#define RCBA16(x) *((volatile u16 *)(DEFAULT_RCBA + x))
#define RCBA32(x) *((volatile u32 *)(DEFAULT_RCBA + x))
static void init_egress(void)
{
u32 reg32;
/* VC0: TC0 only */
EPBAR8(0x14) = 1;
EPBAR8(0x4) = 1;
switch (MCHBAR32(0xc00) & 0x7) {
case 0x0:
/* FSB 1066 */
EPBAR32(0x2c) = 0x0001a6db;
break;
case 0x2:
/* FSB 800 */
EPBAR32(0x2c) = 0x00014514;
break;
default:
case 0x4:
/* FSB 1333 */
EPBAR32(0x2c) = 0x00022861;
break;
}
EPBAR32(0x28) = 0x0a0a0a0a;
EPBAR8(0xc) = (EPBAR8(0xc) & ~0xe) | 2;
EPBAR32(0x1c) = (EPBAR32(0x1c) & ~0x7f0000) | 0x0a0000;
MCHBAR8(0x3c) = MCHBAR8(0x3c) | 0x7;
/* VC1: ID1, TC7 */
reg32 = (EPBAR32(0x20) & ~(7 << 24)) | (1 << 24);
reg32 = (reg32 & ~0xfe) | (1 << 7);
EPBAR32(0x20) = reg32;
/* Init VC1 port arbitration table */
EPBAR32(0x100) = 0x001000001;
EPBAR32(0x104) = 0x000040000;
EPBAR32(0x108) = 0x000001000;
EPBAR32(0x10c) = 0x000000040;
EPBAR32(0x110) = 0x001000001;
EPBAR32(0x114) = 0x000040000;
EPBAR32(0x118) = 0x000001000;
EPBAR32(0x11c) = 0x000000040;
/* Load table */
reg32 = EPBAR32(0x20) | (1 << 16);
EPBAR32(0x20) = reg32;
asm("nop");
EPBAR32(0x20) = reg32;
/* Wait for table load */
while ((EPBAR8(0x26) & (1 << 0)) != 0);
/* VC1: enable */
EPBAR32(0x20) |= 1 << 31;
/* Wait for VC1 */
while ((EPBAR8(0x26) & (1 << 1)) != 0);
printk(BIOS_DEBUG, "Done Egress Port\n");
}
static void init_dmi(void)
{
u32 reg32;
u16 reg16;
/* Assume IGD present */
/* Clear error status */
DMIBAR32(0x1c4) = 0xffffffff;
DMIBAR32(0x1d0) = 0xffffffff;
/* VC0: TC0 only */
DMIBAR8(DMIVC0RCTL) = 1;
DMIBAR8(0x4) = 1;
/* VC1: ID1, TC7 */
reg32 = (DMIBAR32(DMIVC1RCTL) & ~(7 << 24)) | (1 << 24);
reg32 = (reg32 & ~0xff) | 1 << 7;
/* VC1: enable */
reg32 |= 1 << 31;
reg32 = (reg32 & ~(0x7 << 17)) | (0x4 << 17);
DMIBAR32(DMIVC1RCTL) = reg32;
/* Set up VCs in southbridge RCBA */
RCBA8(0x3022) &= ~1;
reg32 = (0x5 << 28) | (1 << 6); /* PCIe x4 */
RCBA32(0x2020) = (RCBA32(0x2020) & ~((0xf << 28) | (0x7 << 6))) | reg32;
/* Assign VC1 id 1 */
RCBA32(0x20) = (RCBA32(0x20) & ~(0x7 << 24)) | (1 << 24);
/* Map TC7 to VC1 */
RCBA8(0x20) &= 1;
RCBA8(0x20) |= 1 << 7;
/* Map TC0 to VC0 */
RCBA8(0x14) &= 1;
/* Init DMI VC1 port arbitration table */
RCBA32(0x20) &= 0xfff1ffff;
RCBA32(0x20) |= 1 << 19;
RCBA32(0x30) = 0x0000000f;
RCBA32(0x34) = 0x000f0000;
RCBA32(0x38) = 0;
RCBA32(0x3c) = 0x000000f0;
RCBA32(0x40) = 0x0f000000;
RCBA32(0x44) = 0;
RCBA32(0x48) = 0x0000f000;
RCBA32(0x4c) = 0;
RCBA32(0x50) = 0x0000000f;
RCBA32(0x54) = 0x000f0000;
RCBA32(0x58) = 0;
RCBA32(0x5c) = 0x000000f0;
RCBA32(0x60) = 0x0f000000;
RCBA32(0x64) = 0;
RCBA32(0x68) = 0x0000f000;
RCBA32(0x6c) = 0;
RCBA32(0x20) |= 1 << 16;
/* Enable VC1 */
RCBA32(0x20) |= 1 << 31;
/* Wait for VC1 */
while ((RCBA8(0x26) & (1 << 1)) != 0);
/* Wait for table load */
while ((RCBA8(0x26) & (1 << 0)) != 0);
/* ASPM on DMI link */
RCBA16(0x1a8) &= ~0x3;
reg16 = RCBA16(0x1a8);
RCBA32(0x2010) = (RCBA32(0x2010) & ~(0x3 << 10)) | (1 << 10);
reg32 = RCBA32(0x2010);
/* Set up VC1 max time */
RCBA32(0x1c) = (RCBA32(0x1c) & ~0x7f0000) | 0x120000;
while ((DMIBAR32(0x26) & (1 << 1)) != 0);
printk(BIOS_DEBUG, "Done DMI setup\n");
/* ASPM on DMI */
DMIBAR32(0x200) &= ~(0x3 << 26);
DMIBAR16(0x210) = (DMIBAR16(0x210) & ~(0xff7)) | 0x101;
DMIBAR32(0x88) &= ~0x3;
DMIBAR32(0x88) |= 0x3;
reg16 = DMIBAR16(0x88);
}
void x4x_late_init(void)
{
init_egress();
init_dmi();
}
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