soc/intel/common/block: Add Intel common SCS code support

Create Intel Common SCS code. This code currently only contains
the code for SD card SSDT generation. More code will get added up
in the subsequent phases.

Change-Id: I82f034ced64e1eaef41a7806133361d73b5009d3
Signed-off-by: Bora Guvendik <bora.guvendik@intel.com>
Reviewed-on: https://review.coreboot.org/19631
Reviewed-by: Aaron Durbin <adurbin@chromium.org>
Tested-by: build bot (Jenkins) <no-reply@coreboot.org>
Reviewed-by: Philippe Mathieu-Daudé <philippe.mathieu.daude@gmail.com>

3 files changed, 82 insertions, 0 deletions

diff --git a/src/soc/intel/common/block/scs/Kconfig b/src/soc/intel/common/block/scs/Kconfig
new file mode 100644
index 0000000000..0a402137bc
--- /dev/null
+++ b/src/soc/intel/common/block/scs/Kconfig
@@ -0,0 +1,4 @@
+config SOC_INTEL_COMMON_BLOCK_SCS
+	bool
+	help
+	  Intel Processor common storage and communication subsystem support
diff --git a/src/soc/intel/common/block/scs/Makefile.inc b/src/soc/intel/common/block/scs/Makefile.inc
new file mode 100644
index 0000000000..1c2a6c6692
--- /dev/null
+++ b/src/soc/intel/common/block/scs/Makefile.inc
@@ -0,0 +1 @@
+ramstage-$(CONFIG_SOC_INTEL_COMMON_BLOCK_SCS) += sd.c
diff --git a/src/soc/intel/common/block/scs/sd.c b/src/soc/intel/common/block/scs/sd.c
new file mode 100644
index 0000000000..ec5f6e8cac
--- /dev/null
+++ b/src/soc/intel/common/block/scs/sd.c
@@ -0,0 +1,77 @@
+/*
+ * This file is part of the coreboot project.
+ *
+ * Copyright 2017 Google Inc.
+ *
+ * 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/acpigen.h>
+#include <device/pci.h>
+#include <device/pci_ids.h>
+#include <intelblocks/sd.h>
+
+#if IS_ENABLED(CONFIG_HAVE_ACPI_TABLES)
+static void sd_fill_ssdt(struct device *dev)
+{
+	const char *path;
+	struct acpi_gpio default_gpio = { 0 };
+	struct acpi_dp *dp;
+
+	if (!dev->enabled)
+		return;
+
+	if (sd_fill_soc_gpio_info(&default_gpio, dev) != 0)
+		return;
+
+	/* Use device path as the Scope for the SSDT */
+	path = acpi_device_path(dev);
+	if (!path)
+		return;
+	acpigen_write_scope(path);
+	acpigen_write_name("_CRS");
+
+	/* Write GpioInt() as default (if set) or custom from devicetree */
+	acpigen_write_resourcetemplate_header();
+	acpi_device_write_gpio(&default_gpio);
+	acpigen_write_resourcetemplate_footer();
+
+	/* Bind the cd-gpio name to the GpioInt() resource */
+	dp = acpi_dp_new_table("_DSD");
+	if (!dp)
+		return;
+	acpi_dp_add_gpio(dp, "cd-gpio", path, 0, 0, 1);
+	acpi_dp_write(dp);
+
+	acpigen_pop_len();
+}
+#endif
+
+static struct device_operations dev_ops = {
+	.read_resources		  = &pci_dev_read_resources,
+	.set_resources		  = &pci_dev_set_resources,
+	.enable_resources	  = &pci_dev_enable_resources,
+#if IS_ENABLED(CONFIG_HAVE_ACPI_TABLES)
+	.acpi_fill_ssdt_generator	= &sd_fill_ssdt,
+#endif
+};
+
+static const unsigned short pci_device_ids[] = {
+	PCI_DEVICE_ID_INTEL_APL_SD,
+	PCI_DEVICE_ID_INTEL_GLK_SD,
+	PCI_DEVICE_ID_INTEL_SKL_SD,
+	0
+};
+
+static const struct pci_driver pch_sd __pci_driver = {
+	.ops	= &dev_ops,
+	.vendor	= PCI_VENDOR_ID_INTEL,
+	.devices	= pci_device_ids
+};