nb/intel/common: Create a common init_igd_opregion method

Copy Haswell's init_igd_opregion to common folder.
Remove platform specific code.
Will replace all Intel NB implementations.

Change-Id: I14dfb5986df264ffd71183a159f98b79e8e3230e
Signed-off-by: Patrick Rudolph <siro@das-labor.org>
Reviewed-on: https://review.coreboot.org/19905
Tested-by: build bot (Jenkins) <no-reply@coreboot.org>
Reviewed-by: Matt DeVillier <matt.devillier@gmail.com>
Reviewed-by: Stefan Reinauer <stefan.reinauer@coreboot.org>

src/northbridge/intel/common/Kconfig

@@ -1,2 +1,5 @@
 config NORTHBRIDGE_INTEL_COMMON_MRC_CACHE
 	def_bool n
+
+config NORTHBRIDGE_INTEL_COMMON_GMA_OPREGION
+	def_bool n

src/northbridge/intel/common/Makefile.inc

@@ -15,3 +15,4 @@
 
 romstage-$(CONFIG_NORTHBRIDGE_INTEL_COMMON_MRC_CACHE) += mrc_cache.c
 ramstage-$(CONFIG_NORTHBRIDGE_INTEL_COMMON_MRC_CACHE) += mrc_cache.c
+ramstage-$(CONFIG_NORTHBRIDGE_INTEL_COMMON_GMA_OPREGION) += gma_opregion.c

src/northbridge/intel/common/gma_opregion.c

@@ -0,0 +1,135 @@
+/*
+ * This file is part of the coreboot project.
+ *
+ * Copyright (C) 2017 Patrick Rudolph <siro@das-labor.org>
+ *
+ * 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 <types.h>
+#include <string.h>
+#include <console/console.h>
+#include <arch/acpi.h>
+#include <device/pci.h>
+#include <device/pci_ids.h>
+#include <drivers/intel/gma/intel_bios.h>
+#include "gma_opregion.h"
+
+static void *get_intel_vbios(void)
+{
+	/* This should probably be looking at CBFS or we should always
+	 * deploy the VBIOS on Intel systems, even if we don't run it
+	 * in coreboot (e.g. SeaBIOS only scenarios).
+	 */
+	u8 *vbios = (u8 *)0xc0000;
+
+	optionrom_header_t *oprom = (optionrom_header_t *)vbios;
+	optionrom_pcir_t *pcir = (optionrom_pcir_t *)(vbios +
+						oprom->pcir_offset);
+
+	printk(BIOS_DEBUG, "GET_VBIOS: %x %x %x %x %x\n",
+		oprom->signature, pcir->vendor, pcir->classcode[0],
+		pcir->classcode[1], pcir->classcode[2]);
+
+
+	if ((oprom->signature == OPROM_SIGNATURE) &&
+		(pcir->vendor == PCI_VENDOR_ID_INTEL) &&
+		(pcir->classcode[0] == 0x00) &&
+		(pcir->classcode[1] == 0x00) &&
+		(pcir->classcode[2] == 0x03))
+		return (void *)vbios;
+
+	return NULL;
+}
+
+static enum cb_err init_opregion_vbt(igd_opregion_t *opregion)
+{
+	void *vbios;
+	vbios = get_intel_vbios();
+	if (!vbios) {
+		printk(BIOS_DEBUG, "VBIOS not found.\n");
+		return CB_ERR;
+	}
+
+	printk(BIOS_DEBUG, " ... VBIOS found at %p\n", vbios);
+	optionrom_header_t *oprom = (optionrom_header_t *)vbios;
+	optionrom_vbt_t *vbt = (optionrom_vbt_t *)(vbios +
+						oprom->vbt_offset);
+
+	if (read32(vbt->hdr_signature) != VBT_SIGNATURE) {
+		printk(BIOS_DEBUG, "VBT not found!\n");
+		return CB_ERR;
+	}
+
+	memcpy(opregion->header.vbios_version, vbt->coreblock_biosbuild, 4);
+	memcpy(opregion->vbt.gvd1, vbt, vbt->hdr_vbt_size < 7168 ?
+						vbt->hdr_vbt_size : 7168);
+
+	return CB_SUCCESS;
+}
+
+/* Initialize IGD OpRegion, called from ACPI code and OS drivers */
+enum cb_err init_igd_opregion(igd_opregion_t *opregion)
+{
+	enum cb_err ret;
+	device_t igd;
+	u16 reg16;
+
+	memset((void *)opregion, 0, sizeof(igd_opregion_t));
+
+	// FIXME if IGD is disabled, we should exit here.
+
+	memcpy(&opregion->header.signature, IGD_OPREGION_SIGNATURE,
+		sizeof(opregion->header.signature));
+
+	/* 8kb */
+	opregion->header.size = sizeof(igd_opregion_t) / 1024;
+	opregion->header.version = IGD_OPREGION_VERSION;
+
+	// FIXME We just assume we're mobile for now
+	opregion->header.mailboxes = MAILBOXES_MOBILE;
+
+	// TODO Initialize Mailbox 1
+
+	// TODO Initialize Mailbox 3
+	opregion->mailbox3.bclp = IGD_BACKLIGHT_BRIGHTNESS;
+	opregion->mailbox3.pfit = IGD_FIELD_VALID | IGD_PFIT_STRETCH;
+	opregion->mailbox3.pcft = 0; // should be (IMON << 1) & 0x3e
+	opregion->mailbox3.cblv = IGD_FIELD_VALID | IGD_INITIAL_BRIGHTNESS;
+	opregion->mailbox3.bclm[0] = IGD_WORD_FIELD_VALID + 0x0000;
+	opregion->mailbox3.bclm[1] = IGD_WORD_FIELD_VALID + 0x0a19;
+	opregion->mailbox3.bclm[2] = IGD_WORD_FIELD_VALID + 0x1433;
+	opregion->mailbox3.bclm[3] = IGD_WORD_FIELD_VALID + 0x1e4c;
+	opregion->mailbox3.bclm[4] = IGD_WORD_FIELD_VALID + 0x2866;
+	opregion->mailbox3.bclm[5] = IGD_WORD_FIELD_VALID + 0x327f;
+	opregion->mailbox3.bclm[6] = IGD_WORD_FIELD_VALID + 0x3c99;
+	opregion->mailbox3.bclm[7] = IGD_WORD_FIELD_VALID + 0x46b2;
+	opregion->mailbox3.bclm[8] = IGD_WORD_FIELD_VALID + 0x50cc;
+	opregion->mailbox3.bclm[9] = IGD_WORD_FIELD_VALID + 0x5ae5;
+	opregion->mailbox3.bclm[10] = IGD_WORD_FIELD_VALID + 0x64ff;
+
+	ret = init_opregion_vbt(opregion);
+	if (ret != CB_SUCCESS)
+		return ret;
+
+	/* TODO This needs to happen in S3 resume, too.
+	 * Maybe it should move to the finalize handler
+	 */
+	igd = dev_find_slot(0, PCI_DEVFN(0x2, 0));
+	pci_write_config32(igd, ASLS, (u32)opregion);
+
+	/* Intel's Windows driver relies on this: */
+	reg16 = pci_read_config16(igd, SWSCI);
+	reg16 &= ~GSSCIE;
+	reg16 |= SMISCISEL;
+	pci_write_config16(igd, SWSCI, reg16);
+
+	return CB_SUCCESS;
+}

src/northbridge/intel/common/gma_opregion.h

@@ -0,0 +1,24 @@
+/*
+ * This file is part of the coreboot project.
+ *
+ * Copyright (C) 2017 Patrick Rudolph <siro@das-labor.org>
+ *
+ * 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.
+ */
+
+#ifndef NORTHBRIDGE_INTEL_COMMON_GMA_OPREGION_H_
+#define NORTHBRIDGE_INTEL_COMMON_GMA_OPREGION_H_
+
+#include <types.h>
+#include <drivers/intel/gma/opregion.h>
+
+enum cb_err init_igd_opregion(igd_opregion_t *opregion);
+
+#endif /* NORTHBRIDGE_INTEL_COMMON_GMA_OPREGION_H_ */