soc/intel/common/block: Move i2c common functions into block/i2c

This patch cleans soc/intel/{apollolake/cannonlake/skylake} by moving
common soc code into common/block/i2c.

BUG=b:78109109
BRANCH=none
TEST=Build and boot KBL/CNL/APL platform.

Change-Id: I88f2f836eee4f80b79486dd8644d1bb3826c5af1
Signed-off-by: Maulik V Vaghela <maulik.v.vaghela@intel.com>
Signed-off-by: Subrata Banik <subrata.banik@intel.com>
Reviewed-on: https://review.coreboot.org/26056
Tested-by: build bot (Jenkins) <no-reply@coreboot.org>
Reviewed-by: Furquan Shaikh <furquan@google.com>

7 files changed, 112 insertions, 158 deletions

diff --git a/src/soc/intel/apollolake/i2c.c b/src/soc/intel/apollolake/i2c.c
index bb14df2a0e..bf378bce34 100644
--- a/src/soc/intel/apollolake/i2c.c
+++ b/src/soc/intel/apollolake/i2c.c
@@ -2,6 +2,7 @@
  * This file is part of the coreboot project.
  *
  * Copyright 2016 Google Inc.
+ * Copyright (C) 2018 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
@@ -13,27 +14,10 @@
  * GNU General Public License for more details.
  */
 
-#include <console/console.h>
 #include <device/device.h>
 #include <device/pci_def.h>
 #include <drivers/i2c/designware/dw_i2c.h>
-#include <intelblocks/chip.h>
-#include <soc/iomap.h>
 #include <soc/pci_devs.h>
-#include "chip.h"
-
-const struct dw_i2c_bus_config *dw_i2c_get_soc_cfg(unsigned int bus)
-{
-	const struct soc_intel_common_config *common_config;
-	common_config = chip_get_common_soc_structure();
-
-	return &common_config->i2c[bus];
-}
-
-uintptr_t dw_i2c_get_soc_early_base(unsigned int bus)
-{
-	return PRERAM_I2C_BASE_ADDRESS(bus);
-}
 
 /* Convert I2C bus number to PCI device and function */
 int dw_i2c_soc_bus_to_devfn(unsigned int bus)
diff --git a/src/soc/intel/apollolake/include/soc/iomap.h b/src/soc/intel/apollolake/include/soc/iomap.h
index 7e6a795c58..9a2500cd45 100644
--- a/src/soc/intel/apollolake/include/soc/iomap.h
+++ b/src/soc/intel/apollolake/include/soc/iomap.h
@@ -51,6 +51,7 @@
 #define EARLY_GSPI_BASE_ADDRESS		0xfe011000
 
 /* Temporary BAR for early I2C bus access */
-#define PRERAM_I2C_BASE_ADDRESS(x)	(0xfe020000 + (0x1000 * (x)))
+#define EARLY_I2C_BASE_ADDRESS		0xfe020000
+#define EARLY_I2C_BASE(x)	(EARLY_I2C_BASE_ADDRESS + (0x1000 * (x)))
 
 #endif /* _SOC_APOLLOLAKE_IOMAP_H_ */
diff --git a/src/soc/intel/cannonlake/i2c.c b/src/soc/intel/cannonlake/i2c.c
index b53d5a0c1c..6983be1c30 100644
--- a/src/soc/intel/cannonlake/i2c.c
+++ b/src/soc/intel/cannonlake/i2c.c
@@ -2,7 +2,7 @@
  * This file is part of the coreboot project.
  *
  * Copyright 2016 Google Inc.
- * Copyright (C) 2017 Intel Corporation.
+ * Copyright (C) 2017-2018 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
@@ -14,27 +14,9 @@
  * GNU General Public License for more details.
  */
 
-#include <console/console.h>
 #include <device/device.h>
-#include <device/pci_def.h>
 #include <drivers/i2c/designware/dw_i2c.h>
-#include <intelblocks/chip.h>
-#include <soc/iomap.h>
 #include <soc/pci_devs.h>
-#include "chip.h"
-
-const struct dw_i2c_bus_config *dw_i2c_get_soc_cfg(unsigned int bus)
-{
-	const struct soc_intel_common_config *common_config;
-	common_config = chip_get_common_soc_structure();
-
-	return &common_config->i2c[bus];
-}
-
-uintptr_t dw_i2c_get_soc_early_base(unsigned int bus)
-{
-	return EARLY_I2C_BASE(bus);
-}
 
 int dw_i2c_soc_devfn_to_bus(unsigned int devfn)
 {
diff --git a/src/soc/intel/common/block/i2c/Makefile.inc b/src/soc/intel/common/block/i2c/Makefile.inc
index 58feb5f781..9683210123 100644
--- a/src/soc/intel/common/block/i2c/Makefile.inc
+++ b/src/soc/intel/common/block/i2c/Makefile.inc
@@ -1,8 +1,8 @@
 ifeq ($(CONFIG_SOC_INTEL_COMMON_BLOCK_I2C),y)
 
-bootblock-y += i2c_early.c
-romstage-y += i2c_early.c
-verstage-y += i2c_early.c
+bootblock-y += i2c.c
+romstage-y += i2c.c
+verstage-y += i2c.c
 ramstage-y += i2c.c
 
 endif
diff --git a/src/soc/intel/common/block/i2c/i2c.c b/src/soc/intel/common/block/i2c/i2c.c
index 7dd40db146..11bd018c8b 100644
--- a/src/soc/intel/common/block/i2c/i2c.c
+++ b/src/soc/intel/common/block/i2c/i2c.c
@@ -13,10 +13,113 @@
  * GNU General Public License for more details.
  */
 
+#include <arch/io.h>
+#include <console/console.h>
+#include <device/device.h>
+#include <device/i2c_simple.h>
 #include <device/pci.h>
 #include <device/pci_def.h>
 #include <device/pci_ids.h>
 #include <drivers/i2c/designware/dw_i2c.h>
+#include <intelblocks/chip.h>
+#include <intelblocks/lpss.h>
+#include <soc/iomap.h>
+#include <soc/pci_devs.h>
+
+int dw_i2c_soc_dev_to_bus(struct device *dev)
+{
+	pci_devfn_t devfn = dev->path.pci.devfn;
+	return dw_i2c_soc_devfn_to_bus(devfn);
+}
+
+/* Getting I2C bus configuration from devicetree config */
+const struct dw_i2c_bus_config *dw_i2c_get_soc_cfg(unsigned int bus)
+{
+	const struct soc_intel_common_config *common_config;
+	common_config = chip_get_common_soc_structure();
+
+	return &common_config->i2c[bus];
+}
+
+/* Get base address for early init of I2C controllers. */
+uintptr_t dw_i2c_get_soc_early_base(unsigned int bus)
+{
+	return EARLY_I2C_BASE(bus);
+}
+
+#if !ENV_RAMSTAGE
+static int lpss_i2c_early_init_bus(unsigned int bus)
+{
+	const struct dw_i2c_bus_config *config;
+	const struct device *tree_dev;
+	pci_devfn_t dev;
+	int devfn;
+	uintptr_t base;
+
+	/* Find the PCI device for this bus controller */
+	devfn = dw_i2c_soc_bus_to_devfn(bus);
+	if (devfn < 0) {
+		printk(BIOS_ERR, "I2C%u device not found\n", bus);
+		return -1;
+	}
+
+	/* Look up the controller device in the devicetree */
+	dev = PCI_DEV(0, PCI_SLOT(devfn), PCI_FUNC(devfn));
+	tree_dev = dev_find_slot(0, devfn);
+	if (!tree_dev || !tree_dev->enabled) {
+		printk(BIOS_ERR, "I2C%u device not enabled\n", bus);
+		return -1;
+	}
+
+	/* Skip if not enabled for early init */
+	config = dw_i2c_get_soc_cfg(bus);
+	if (!config || !config->early_init) {
+		printk(BIOS_DEBUG, "I2C%u not enabled for early init\n", bus);
+		return -1;
+	}
+
+	/* Prepare early base address for access before memory */
+	base = dw_i2c_get_soc_early_base(bus);
+	pci_write_config32(dev, PCI_BASE_ADDRESS_0, base);
+	pci_write_config32(dev, PCI_COMMAND,
+			   PCI_COMMAND_MEMORY | PCI_COMMAND_MASTER);
+
+	/* Take device out of reset */
+	lpss_reset_release(base);
+
+	/* Initialize the controller */
+	if (dw_i2c_init(bus, config) < 0) {
+		printk(BIOS_ERR, "I2C%u failed to initialize\n", bus);
+		return -1;
+	}
+
+	return 0;
+}
+
+uintptr_t dw_i2c_base_address(unsigned int bus)
+{
+	int devfn;
+	pci_devfn_t dev;
+	uintptr_t base;
+
+	/* Find device+function for this controller */
+	devfn = dw_i2c_soc_bus_to_devfn(bus);
+	if (devfn < 0)
+		return (uintptr_t)NULL;
+
+	/* Form a PCI address for this device */
+	dev = PCI_DEV(0, PCI_SLOT(devfn), PCI_FUNC(devfn));
+
+	/* Read the first base address for this device */
+	base = ALIGN_DOWN(pci_read_config32(dev, PCI_BASE_ADDRESS_0), 16);
+
+	/* Attempt to initialize bus if base is not set yet */
+	if (!base && !lpss_i2c_early_init_bus(bus))
+		base = ALIGN_DOWN(pci_read_config32(dev, PCI_BASE_ADDRESS_0),
+				  16);
+	return base;
+}
+#else
 
 uintptr_t dw_i2c_base_address(unsigned int bus)
 {
@@ -43,12 +146,6 @@ uintptr_t dw_i2c_base_address(unsigned int bus)
 	return (uintptr_t)NULL;
 }
 
-int dw_i2c_soc_dev_to_bus(struct device *dev)
-{
-	pci_devfn_t devfn = dev->path.pci.devfn;
-	return dw_i2c_soc_devfn_to_bus(devfn);
-}
-
 static struct device_operations i2c_dev_ops = {
 	.read_resources			= &pci_dev_read_resources,
 	.set_resources			= &pci_dev_set_resources,
@@ -101,3 +198,4 @@ static const struct pci_driver pch_i2c __pci_driver = {
 	.vendor	 = PCI_VENDOR_ID_INTEL,
 	.devices = pci_device_ids,
 };
+#endif
diff --git a/src/soc/intel/common/block/i2c/i2c_early.c b/src/soc/intel/common/block/i2c/i2c_early.c
deleted file mode 100644
index c4af55967a..0000000000
--- a/src/soc/intel/common/block/i2c/i2c_early.c
+++ /dev/null
@@ -1,96 +0,0 @@
-/*
- * This file is part of the coreboot project.
- *
- * Copyright 2016 Google Inc.
- * Copyright 2017 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 <console/console.h>
-#include <device/device.h>
-#include <device/i2c_simple.h>
-#include <device/pci.h>
-#include <device/pci_def.h>
-#include <drivers/i2c/designware/dw_i2c.h>
-#include <intelblocks/lpss.h>
-
-static int lpss_i2c_early_init_bus(unsigned int bus)
-{
-	const struct dw_i2c_bus_config *config;
-	const struct device *tree_dev;
-	pci_devfn_t dev;
-	int devfn;
-	uintptr_t base;
-
-	/* Find the PCI device for this bus controller */
-	devfn = dw_i2c_soc_bus_to_devfn(bus);
-	if (devfn < 0) {
-		printk(BIOS_ERR, "I2C%u device not found\n", bus);
-		return -1;
-	}
-
-	/* Look up the controller device in the devicetree */
-	dev = PCI_DEV(0, PCI_SLOT(devfn), PCI_FUNC(devfn));
-	tree_dev = dev_find_slot(0, devfn);
-	if (!tree_dev || !tree_dev->enabled) {
-		printk(BIOS_ERR, "I2C%u device not enabled\n", bus);
-		return -1;
-	}
-
-	/* Skip if not enabled for early init */
-	config = dw_i2c_get_soc_cfg(bus);
-	if (!config || !config->early_init) {
-		printk(BIOS_DEBUG, "I2C%u not enabled for early init\n", bus);
-		return -1;
-	}
-
-	/* Prepare early base address for access before memory */
-	base = dw_i2c_get_soc_early_base(bus);
-	pci_write_config32(dev, PCI_BASE_ADDRESS_0, base);
-	pci_write_config32(dev, PCI_COMMAND,
-			   PCI_COMMAND_MEMORY | PCI_COMMAND_MASTER);
-
-	/* Take device out of reset */
-	lpss_reset_release(base);
-
-	/* Initialize the controller */
-	if (dw_i2c_init(bus, config) < 0) {
-		printk(BIOS_ERR, "I2C%u failed to initialize\n", bus);
-		return -1;
-	}
-
-	return 0;
-}
-
-uintptr_t dw_i2c_base_address(unsigned int bus)
-{
-	int devfn;
-	pci_devfn_t dev;
-	uintptr_t base;
-
-	/* Find device+function for this controller */
-	devfn = dw_i2c_soc_bus_to_devfn(bus);
-	if (devfn < 0)
-		return (uintptr_t)NULL;
-
-	/* Form a PCI address for this device */
-	dev = PCI_DEV(0, PCI_SLOT(devfn), PCI_FUNC(devfn));
-
-	/* Read the first base address for this device */
-	base = ALIGN_DOWN(pci_read_config32(dev, PCI_BASE_ADDRESS_0), 16);
-
-	/* Attempt to initialize bus if base is not set yet */
-	if (!base && !lpss_i2c_early_init_bus(bus))
-		base = ALIGN_DOWN(pci_read_config32(dev, PCI_BASE_ADDRESS_0),
-				  16);
-	return base;
-}
diff --git a/src/soc/intel/skylake/i2c.c b/src/soc/intel/skylake/i2c.c
index c9070fe5a0..9fd9bf39e6 100644
--- a/src/soc/intel/skylake/i2c.c
+++ b/src/soc/intel/skylake/i2c.c
@@ -2,6 +2,7 @@
  * This file is part of the coreboot project.
  *
  * Copyright 2016 Google Inc.
+ * Copyright (C) 2018 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
@@ -13,26 +14,10 @@
  * GNU General Public License for more details.
  */
 
-#include <console/console.h>
 #include <device/device.h>
 #include <intelblocks/chip.h>
 #include <drivers/i2c/designware/dw_i2c.h>
-#include <soc/iomap.h>
 #include <soc/pci_devs.h>
-#include "chip.h"
-
-const struct dw_i2c_bus_config *dw_i2c_get_soc_cfg(unsigned int bus)
-{
-	const struct soc_intel_common_config *common_config;
-	common_config = chip_get_common_soc_structure();
-
-	return &common_config->i2c[bus];
-}
-
-uintptr_t dw_i2c_get_soc_early_base(unsigned int bus)
-{
-	return EARLY_I2C_BASE(bus);
-}
 
 int dw_i2c_soc_devfn_to_bus(unsigned int devfn)
 {