soc/intel/skylake: Clean up bootblock/report_platform.c

This patch ensures that all required information for
pch/mch/igd deviceid and revision available in single
stage and make use of local references.

TEST=Build and boot soraka/eve

Change-Id: I6f7f219536831210750a486ee3b3308d6f285451
Signed-off-by: Subrata Banik <subrata.banik@intel.com>
Reviewed-on: https://review.coreboot.org/22756
Reviewed-by: Rizwan Qureshi <rizwan.qureshi@intel.com>
Tested-by: build bot (Jenkins) <no-reply@coreboot.org>
Reviewed-by: Furquan Shaikh <furquan@google.com>
Reviewed-by: Aaron Durbin <adurbin@chromium.org>

src/soc/intel/skylake/Makefile.inc

@@ -16,14 +16,12 @@ bootblock-y += bootblock/pch.c
 bootblock-y += bootblock/report_platform.c
 bootblock-y += gpio.c
 bootblock-y += gspi.c
-bootblock-y += pch.c
 bootblock-y += pmutil.c
 bootblock-y += spi.c
 bootblock-y += lpc.c
 bootblock-$(CONFIG_UART_DEBUG) += uart.c
 
 verstage-y += gspi.c
-verstage-y += pch.c
 verstage-y += pmutil.c
 verstage-y += i2c.c
 verstage-y += spi.c
@@ -34,7 +32,6 @@ romstage-y += gspi.c
 romstage-y += i2c.c
 romstage-y += memmap.c
 romstage-y += me.c
-romstage-y += pch.c
 romstage-y += pei_data.c
 romstage-y += pmc.c
 romstage-y += pmutil.c
@@ -57,7 +54,6 @@ ramstage-y += lockdown.c
 ramstage-y += lpc.c
 ramstage-y += me.c
 ramstage-y += memmap.c
-ramstage-y += pch.c
 ramstage-y += pei_data.c
 ramstage-y += pmc.c
 ramstage-y += pmutil.c
@@ -73,7 +69,6 @@ ramstage-y += vr_config.c
 
 smm-y += elog.c
 smm-y += gpio.c
-smm-y += pch.c
 smm-y += pmutil.c
 smm-y += smihandler.c
 smm-$(CONFIG_UART_DEBUG) += uart.c

src/soc/intel/skylake/bootblock/report_platform.c

@@ -96,6 +96,16 @@ static struct {
 	{ PCI_DEVICE_ID_INTEL_KBL_GT2_SHALM, "Kabylake HALO GT2" },
 };
 
+static uint8_t get_dev_revision(device_t dev)
+{
+	return pci_read_config8(dev, PCI_REVISION_ID);
+}
+
+static uint16_t get_dev_id(device_t dev)
+{
+	return pci_read_config16(dev, PCI_DEVICE_ID);
+}
+
 static void report_cpu_info(void)
 {
 	struct cpuid_result cpuidr;
@@ -153,8 +163,9 @@ static void report_cpu_info(void)
 static void report_mch_info(void)
 {
 	int i;
-	u16 mchid = pci_read_config16(SA_DEV_ROOT, PCI_DEVICE_ID);
-	u8 mch_revision = pci_read_config8(SA_DEV_ROOT, PCI_REVISION_ID);
+	device_t dev = SA_DEV_ROOT;
+	uint16_t mchid = get_dev_id(dev);
+	uint8_t mch_revision = get_dev_revision(dev);
 	const char *mch_type = "Unknown";
 
 	for (i = 0; i < ARRAY_SIZE(mch_table); i++) {
@@ -171,7 +182,8 @@ static void report_mch_info(void)
 static void report_pch_info(void)
 {
 	int i;
-	u16 lpcid = pch_type();
+	device_t dev = PCH_DEV_LPC;
+	uint16_t lpcid = get_dev_id(dev);
 	const char *pch_type = "Unknown";
 
 	for (i = 0; i < ARRAY_SIZE(pch_table); i++) {
@@ -181,13 +193,14 @@ static void report_pch_info(void)
 		}
 	}
 	printk(BIOS_DEBUG, "PCH: device id %04x (rev %02x) is %s\n",
-	       lpcid, pch_revision(), pch_type);
+	       lpcid, get_dev_revision(dev), pch_type);
 }
 
 static void report_igd_info(void)
 {
 	int i;
-	u16 igdid = pci_read_config16(SA_DEV_IGD, PCI_DEVICE_ID);
+	device_t dev = SA_DEV_IGD;
+	uint16_t igdid = get_dev_id(dev);
 	const char *igd_type = "Unknown";
 
 	for (i = 0; i < ARRAY_SIZE(igd_table); i++) {
@@ -197,7 +210,7 @@ static void report_igd_info(void)
 		}
 	}
 	printk(BIOS_DEBUG, "IGD: device id %04x (rev %02x) is %s\n",
-	       igdid, pci_read_config8(SA_DEV_IGD, PCI_REVISION_ID), igd_type);
+	       igdid, get_dev_revision(dev), igd_type);
 }
 
 void report_platform_info(void)

src/soc/intel/skylake/include/soc/pch.h

@@ -21,8 +21,6 @@
 #include <device/device.h>
 #include <rules.h>
 
-u8 pch_revision(void);
-u16 pch_type(void);
 void pch_log_state(void);
 #if ENV_RAMSTAGE
 void pch_disable_devfn(device_t dev);

src/soc/intel/skylake/pch.c

@@ -1,32 +0,0 @@
-/*
- * This file is part of the coreboot project.
- *
- * Copyright (C) 2008-2009 coresystems GmbH
- * Copyright (C) 2014 Google Inc.
- * Copyright (C) 2015 Intel Corporation.
- *
- * 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 <arch/io.h>
-#include <device/device.h>
-#include <device/pci.h>
-#include <soc/pch.h>
-#include <soc/pci_devs.h>
-
-u8 pch_revision(void)
-{
-	return pci_read_config8(PCH_DEV_LPC, PCI_REVISION_ID);
-}
-
-u16 pch_type(void)
-{
-	return pci_read_config16(PCH_DEV_LPC, PCI_DEVICE_ID);
-}