1 files changed, 82 insertions, 0 deletions
diff --git a/src/soc/intel/apollolake/sd.c b/src/soc/intel/apollolake/sd.c
new file mode 100644
index 0000000000..2f38061b27
--- /dev/null
+++ b/src/soc/intel/apollolake/sd.c
@@ -0,0 +1,82 @@
+/*
+ * This file is part of the coreboot project.
+ *
+ * Copyright 2016 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/acpi_device.h>
+#include <arch/acpigen.h>
+#include <device/device.h>
+#include <device/pci.h>
+#include <device/pci_ids.h>
+#include <gpio.h>
+#include "chip.h"
+
+#if IS_ENABLED(CONFIG_HAVE_ACPI_TABLES)
+static void sd_fill_ssdt(struct device *dev)
+{
+	config_t *config = dev->chip_info;
+	const char *path;
+	struct acpi_gpio default_gpio = {
+		.type = ACPI_GPIO_TYPE_INTERRUPT,
+		.pull = ACPI_GPIO_PULL_NONE,
+		.irq.mode = ACPI_IRQ_EDGE_TRIGGERED,
+		.irq.polarity = ACPI_IRQ_ACTIVE_BOTH,
+		.irq.shared = ACPI_IRQ_SHARED,
+		.irq.wake = ACPI_IRQ_WAKE,
+		.interrupt_debounce_timeout = 10000, /* 100ms */
+		.pin_count = 1,
+		.pins = { config->sdcard_cd_gpio }
+	};
+	struct acpi_dp *dp;
+
+	if (!dev->enabled)
+		return;
+
+	/* Use device path as the Scope for the SSDT */
+	path = acpi_device_path(dev);
+	if (!path)
+		return;
+	if (!config->sdcard_cd_gpio)
+		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");
+	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,
+	.ops_pci		  = &soc_pci_ops,
+#if IS_ENABLED(CONFIG_HAVE_ACPI_TABLES)
+	.acpi_fill_ssdt_generator = &sd_fill_ssdt,
+#endif
+};
+
+static const struct pci_driver pch_sd __pci_driver = {
+	.ops	= &dev_ops,
+	.vendor	= PCI_VENDOR_ID_INTEL,
+	.device	= 0x5aca
+};