nb/intel/x4x: Add DMI/EP init

The values were obtained from vendor bios at runtime.
I am not 100% sure of the sequence required to initiate them,
but guessed from the gm45 code.  There may be some status bytes
needed to be polled during the sequence that is missing,
but as I don't have bios writer's datasheet it's very hard
for me to know.

Change-Id: Idd205e0bab5f75e01c6e3a5dc320c08639f52db8
Signed-off-by: Damien Zammit <damien@zamaudio.com>
Reviewed-on: https://review.coreboot.org/14925
Tested-by: build bot (Jenkins)
Reviewed-by: Martin Roth <martinroth@google.com>

3 files changed, 178 insertions, 0 deletions

diff --git a/src/northbridge/intel/x4x/Makefile.inc b/src/northbridge/intel/x4x/Makefile.inc
index 34d9b0fdd7..3520944ea2 100644
--- a/src/northbridge/intel/x4x/Makefile.inc
+++ b/src/northbridge/intel/x4x/Makefile.inc
@@ -20,6 +20,7 @@ romstage-y += early_init.c
 romstage-y += raminit.c
 romstage-y += raminit_ddr2.c
 romstage-y += ram_calc.c
+romstage-y += pcie.c
 
 ramstage-y += acpi.c
 ramstage-y += ram_calc.c
diff --git a/src/northbridge/intel/x4x/pcie.c b/src/northbridge/intel/x4x/pcie.c
new file mode 100644
index 0000000000..d432fea3c0
--- /dev/null
+++ b/src/northbridge/intel/x4x/pcie.c
@@ -0,0 +1,176 @@
+/*
+ * 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
+
+static void init_egress(void)
+{
+	/* VC0: TC0 only */
+	EPBAR8(0x14) = 1;
+	EPBAR8(0x4) = 1;
+
+	/* VC1: ID1, TC7 */
+	EPBAR32(0x20) = (EPBAR32(0x20) & ~(7 << 24)) | (1 << 24);
+	EPBAR8(0x20) = 1 << 7;
+
+	/* VC1: enable */
+	EPBAR32(0x20) |= 1 << 31;
+
+	while ((EPBAR8(0x26) & 2) != 0) ;
+
+	printk(BIOS_DEBUG, "Done EP loop\n");
+}
+
+static void init_dmi(void)
+{
+	/* VC0: TC0 only */
+	DMIBAR8(DMIVC0RCTL) = 1;
+	DMIBAR8(0x4) = 1;
+
+	/* VC1: ID1, TC7 */
+	DMIBAR32(DMIVC1RCTL) = (DMIBAR32(DMIVC1RCTL) & ~(7 << 24)) | (1 << 24);
+	DMIBAR8(DMIVC1RCTL) = 1 << 7;
+
+	/* VC1: enable */
+	DMIBAR32(DMIVC1RCTL) |= 1 << 31;
+
+	// Hangs
+	//while ((DMIBAR8(0x26) & 2) != 0) ;
+	//printk(BIOS_DEBUG, "Done DMI loop\n");
+
+	DMIBAR32(0x0028) = 0x00000001;
+	DMIBAR32(0x002c) = 0x86000000;
+	DMIBAR32(0x0040) = 0x08010005;
+	DMIBAR32(0x0044) = 0x01010202;
+	DMIBAR32(0x0050) = 0x00020001;
+	DMIBAR32(0x0058) = DEFAULT_RCBA;
+	DMIBAR32(0x0060) = 0x00010001;
+	DMIBAR32(0x0068) = DEFAULT_EPBAR;
+	DMIBAR32(0x0080) = 0x00010006;
+	DMIBAR32(0x0084) = 0x00012c41;
+	DMIBAR32(0x0088) = 0x00410000;
+	DMIBAR32(0x00f0) = 0x00012000;
+	DMIBAR32(0x00f4) = 0x33fe0037;
+	DMIBAR32(0x00fc) = 0xf000f004;
+
+	DMIBAR32(0x01b0) = 0x00400000;
+	DMIBAR32(0x01b4) = 0x00008000;
+	DMIBAR32(0x01b8) = 0x000018f2;
+	DMIBAR32(0x01bc) = 0x00000018;
+	DMIBAR32(0x01cc) = 0x00060010;
+	DMIBAR32(0x01d4) = 0x00002000;
+	DMIBAR32(0x0200) = 0x00400f26;
+	DMIBAR32(0x0204) = 0x0001313f;
+	DMIBAR32(0x0208) = 0x00007cb0;
+	DMIBAR32(0x0210) = 0x00000101;
+	DMIBAR32(0x0214) = 0x0007000f;
+	DMIBAR32(0x0224) = 0x00030005;
+	DMIBAR32(0x0230) = 0x2800000e;
+	DMIBAR32(0x0234) = 0x4abcb5bc;
+	DMIBAR32(0x0250) = 0x00000007;
+
+	DMIBAR32(0x0c00) = 0x0000003c;
+	DMIBAR32(0x0c04) = 0x16000000;
+	DMIBAR32(0x0c0c) = 0x00001fff;
+	DMIBAR32(0x0c10) = 0x0000b100;
+	DMIBAR32(0x0c24) = 0xffff0038;
+	DMIBAR32(0x0c28) = 0x0000000e;
+	DMIBAR32(0x0c2c) = 0x003c0008;
+	DMIBAR32(0x0c30) = 0x02000180;
+	DMIBAR32(0x0c34) = 0x10040071;
+	DMIBAR32(0x0d60) = 0x00000001;
+	DMIBAR32(0x0d6c) = 0x00000300;
+	DMIBAR32(0x0d74) = 0x00000020;
+	DMIBAR32(0x0d78) = 0x00220000;
+	DMIBAR32(0x0d7c) = 0x111f727c;
+	DMIBAR32(0x0d80) = 0x00001409;
+	DMIBAR32(0x0d88) = 0x000f1867;
+	DMIBAR32(0x0d8c) = 0x013000fc;
+	DMIBAR32(0x0da4) = 0x00009757;
+	DMIBAR32(0x0da8) = 0x00000078;
+	DMIBAR32(0x0e00) = 0x000d034e;
+	DMIBAR32(0x0e04) = 0x01880880;
+	DMIBAR32(0x0e08) = 0x01000060;
+	DMIBAR32(0x0e0c) = 0x00000080;
+	DMIBAR32(0x0e10) = 0xbe000000;
+	DMIBAR32(0x0e18) = 0x000000e3;
+	DMIBAR32(0x0e20) = 0x000d034e;
+	DMIBAR32(0x0e24) = 0x01880880;
+	DMIBAR32(0x0e28) = 0x01000060;
+	DMIBAR32(0x0e2c) = 0x00000080;
+	DMIBAR32(0x0e30) = 0xbe000000;
+	DMIBAR32(0x0e38) = 0x000000e3;
+	DMIBAR32(0x0e40) = 0x000d034e;
+	DMIBAR32(0x0e44) = 0x01880880;
+	DMIBAR32(0x0e48) = 0x01000060;
+	DMIBAR32(0x0e4c) = 0x00000080;
+	DMIBAR32(0x0e50) = 0xbe000000;
+	DMIBAR32(0x0e58) = 0x000000e3;
+	DMIBAR32(0x0e60) = 0x000d034e;
+	DMIBAR32(0x0e64) = 0x01880880;
+	DMIBAR32(0x0e68) = 0x01000060;
+	DMIBAR32(0x0e6c) = 0x00000080;
+	DMIBAR32(0x0e70) = 0xbe000000;
+	DMIBAR32(0x0e78) = 0x000000e3;
+
+	DMIBAR32(0x0e14) = 0xce00381b;
+	DMIBAR32(0x0e34) = 0x4000781b;
+	DMIBAR32(0x0e54) = 0x5c00781b;
+	DMIBAR32(0x0e74) = 0x5400381b;
+
+	DMIBAR32(0x0218) = 0x0b6202c1;
+	DMIBAR32(0x021c) = 0x02c202c2;
+
+	DMIBAR32(0x0334) = 0x00b904b3;
+	DMIBAR32(0x0338) = 0x004e0000;
+
+	DMIBAR32(0x0300) = 0x00a70f4c;
+	DMIBAR32(0x0304) = 0x00a90f54;
+	DMIBAR32(0x0308) = 0x00d103c4;
+	DMIBAR32(0x030c) = 0x003c0e10;
+	DMIBAR32(0x0310) = 0x003d0e11;
+	DMIBAR32(0x0314) = 0x00640000;
+	DMIBAR32(0x0318) = 0x00320c86;
+	DMIBAR32(0x031c) = 0x003a0ca6;
+	DMIBAR32(0x0324) = 0x00040010;
+	DMIBAR32(0x0328) = 0x00040000;
+
+	EPBAR32(0x40) = 0x00010005;
+	EPBAR32(0x44) = 0x00010301;
+	EPBAR32(0x50) = 0x01010001;
+	EPBAR32(0x58) = DEFAULT_DMIBAR;
+	EPBAR32(0x60) = 0x02010003;
+	EPBAR32(0x68) = 0x00008000;
+	EPBAR32(0x70) = 0x03000002;
+	EPBAR32(0x78) = 0x00030000;
+}
+
+void x4x_late_init(void)
+{
+	init_egress();
+	init_dmi();
+}
diff --git a/src/northbridge/intel/x4x/x4x.h b/src/northbridge/intel/x4x/x4x.h
index e1ef745867..17810aa3cb 100644
--- a/src/northbridge/intel/x4x/x4x.h
+++ b/src/northbridge/intel/x4x/x4x.h
@@ -315,6 +315,7 @@ enum ddr2_signals {
 
 #ifndef __BOOTBLOCK__
 void x4x_early_init(void);
+void x4x_late_init(void);
 u32 decode_igd_memory_size(u32 gms);
 u32 decode_igd_gtt_size(u32 gsm);
 u8 decode_pciebar(u32 *const base, u32 *const len);