soc/intel/common: Add Intel SATA common code support

Add SATA code support in intel/common/block to initilalize
SATA controller, allocate resources and configure SATA port
status.

Change-Id: I42ec0059f7e311a232c38fef6a2e050a3e2c0ad3
Signed-off-by: Aamir Bohra <aamir.bohra@intel.com>
Reviewed-on: https://review.coreboot.org/19734
Tested-by: build bot (Jenkins) <no-reply@coreboot.org>
Reviewed-by: Aaron Durbin <adurbin@chromium.org>
Reviewed-by: Philippe Mathieu-Daudé <philippe.mathieu.daude@gmail.com>
diff --git a/src/soc/intel/common/block/sata/Kconfig b/src/soc/intel/common/block/sata/Kconfig
new file mode 100644
index 0000000..89ca12e
--- /dev/null
+++ b/src/soc/intel/common/block/sata/Kconfig
@@ -0,0 +1,5 @@
+config SOC_INTEL_COMMON_BLOCK_SATA
+	bool
+	help
+	  Intel Processor common SATA support
+
diff --git a/src/soc/intel/common/block/sata/Makefile.inc b/src/soc/intel/common/block/sata/Makefile.inc
new file mode 100644
index 0000000..623d151
--- /dev/null
+++ b/src/soc/intel/common/block/sata/Makefile.inc
@@ -0,0 +1 @@
+ramstage-$(CONFIG_SOC_INTEL_COMMON_BLOCK_SATA) += sata.c
diff --git a/src/soc/intel/common/block/sata/sata.c b/src/soc/intel/common/block/sata/sata.c
new file mode 100644
index 0000000..f027486
--- /dev/null
+++ b/src/soc/intel/common/block/sata/sata.c
@@ -0,0 +1,74 @@
+/*
+ * This file is part of the coreboot project.
+ *
+ * Copyright (C) 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 <device/device.h>
+#include <device/pci.h>
+#include <device/pci_def.h>
+#include <device/pci_ids.h>
+#include <soc/pci_devs.h>
+
+#define SATA_ABAR_PORT_IMPLEMENTED	0x0c
+#define SATA_PCI_CFG_PORT_CTL_STS	0x92
+
+static void *get_ahci_bar(void)
+{
+	uintptr_t bar;
+	device_t dev = PCH_DEV_SATA;
+
+	bar = pci_read_config32(dev, PCI_BASE_ADDRESS_5);
+	return (void *)(bar & ~PCI_BASE_ADDRESS_MEM_ATTR_MASK);
+}
+
+/*
+ * SATA Port control and Status. By default, the SATA ports are set (by HW)
+ * to the disabled state (e.g. bits[3:0] == '0') as a result of an initial
+ * power on reset. When enabled by software as per SATA port mapping,
+ * the ports can transition between the on, partial and slumber states
+ * and can detect devices. When disabled, the port is in the off state and
+ * can't detect any devices.
+ */
+static void sata_final(device_t dev)
+{
+	void *ahcibar = get_ahci_bar();
+	u32 port_impl, temp;
+
+	dev = PCH_DEV_SATA;
+	/* Read Ports Implemented (GHC_PI) */
+	port_impl = read32(ahcibar + SATA_ABAR_PORT_IMPLEMENTED) & 0x07;
+	/* Port enable */
+	temp = pci_read_config32(dev, SATA_PCI_CFG_PORT_CTL_STS);
+	temp |= port_impl;
+	pci_write_config32(dev, SATA_PCI_CFG_PORT_CTL_STS, temp);
+}
+
+static struct device_operations sata_ops = {
+	.read_resources		= &pci_dev_read_resources,
+	.set_resources		= &pci_dev_set_resources,
+	.enable_resources		= &pci_dev_enable_resources,
+	.final		= sata_final,
+};
+
+static const unsigned short pci_device_ids[] = {
+	PCI_DEVICE_ID_INTEL_SPT_U_SATA,
+	PCI_DEVICE_ID_INTEL_SPT_U_Y_PREMIUM_SATA,
+	PCI_DEVICE_ID_INTEL_SPT_KBL_SATA,
+	0
+};
+
+static const struct pci_driver pch_sata __pci_driver = {
+	.ops	= &sata_ops,
+	.vendor	= PCI_VENDOR_ID_INTEL,
+	.devices	= pci_device_ids,
+};