1 files changed, 107 insertions, 0 deletions
diff --git a/src/drivers/i2c/sx9310/sx9310.c b/src/drivers/i2c/sx9310/sx9310.c
new file mode 100644
index 0000000000..7da87c480a
--- /dev/null
+++ b/src/drivers/i2c/sx9310/sx9310.c
@@ -0,0 +1,107 @@
+/*
+ * This file is part of the coreboot project.
+ *
+ * Copyright 2018 Google LLC
+ *
+ * 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/i2c_simple.h>
+#include <device/device.h>
+#include <device/path.h>
+#include <stdint.h>
+#include <string.h>
+#include "chip.h"
+
+#define I2C_SX9310_ACPI_ID	"SX9310"
+#define I2C_SX9310_ACPI_NAME	"Semtech SX9310"
+
+#define REGISTER(NAME) acpi_dp_add_integer(dsd, \
+					I2C_SX9310_ACPI_ID "," #NAME, \
+					config->NAME)
+
+static void i2c_sx9310_fill_ssdt(struct device *dev)
+{
+	struct drivers_i2c_sx9310_config *config = dev->chip_info;
+	const char *scope = acpi_device_scope(dev);
+	struct acpi_i2c i2c = {
+		.address = dev->path.i2c.device,
+		.mode_10bit = dev->path.i2c.mode_10bit,
+		.speed = config->speed ? : I2C_SPEED_FAST,
+		.resource = scope,
+	};
+	struct acpi_dp *dsd;
+
+	if (!dev->enabled || !scope || !config)
+		return;
+
+	/* Device */
+	acpigen_write_scope(scope);
+	acpigen_write_device(acpi_device_name(dev));
+	acpigen_write_name_string("_HID", I2C_SX9310_ACPI_ID);
+	acpigen_write_name_integer("_UID", config->uid);
+	acpigen_write_name_string("_DDN", config->desc);
+	acpigen_write_STA(ACPI_STATUS_DEVICE_ALL_ON);
+
+	/* Resources */
+	acpigen_write_name("_CRS");
+	acpigen_write_resourcetemplate_header();
+	acpi_device_write_i2c(&i2c);
+	acpi_device_write_interrupt(&config->irq);
+	acpigen_write_resourcetemplate_footer();
+
+	/* DSD */
+	dsd = acpi_dp_new_table("_DSD");
+#include "registers.h"
+	acpi_dp_write(dsd);
+
+	acpigen_pop_len(); /* Device */
+	acpigen_pop_len(); /* Scope */
+}
+
+#undef REGISTER
+
+static const char *i2c_sx9310_acpi_name(const struct device *dev)
+{
+	static char name[5];
+
+	snprintf(name, sizeof(name), "D%03.3X", dev->path.i2c.device);
+	return name;
+}
+
+static struct device_operations i2c_sx9310_ops = {
+	.read_resources		  = DEVICE_NOOP,
+	.set_resources		  = DEVICE_NOOP,
+	.enable_resources	  = DEVICE_NOOP,
+	.acpi_name		  = &i2c_sx9310_acpi_name,
+	.acpi_fill_ssdt_generator = &i2c_sx9310_fill_ssdt,
+};
+
+static void i2c_sx9310_enable(struct device *dev)
+{
+	struct drivers_i2c_sx9310_config *config = dev->chip_info;
+
+	if (!config) {
+		dev->enabled = 0;
+		return;
+	}
+
+	dev->ops = &i2c_sx9310_ops;
+
+	if (config->desc)
+		dev->name = config->desc;
+}
+
+struct chip_operations drivers_i2c_sx9310_ops = {
+	CHIP_NAME(I2C_SX9310_ACPI_NAME)
+	.enable_dev = &i2c_sx9310_enable
+};