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-rw-r--r--src/drivers/generic/generic/Kconfig1
-rw-r--r--src/drivers/generic/generic/Makefile.inc2
-rw-r--r--src/drivers/generic/generic/chip.h48
-rw-r--r--src/drivers/generic/generic/generic.c98
4 files changed, 148 insertions, 1 deletions
diff --git a/src/drivers/generic/generic/Kconfig b/src/drivers/generic/generic/Kconfig
index 864b878e9a..7b16b623df 100644
--- a/src/drivers/generic/generic/Kconfig
+++ b/src/drivers/generic/generic/Kconfig
@@ -1,2 +1,3 @@
config DRIVERS_GENERIC_GENERIC
bool
+ depends on HAVE_ACPI_TABLES
diff --git a/src/drivers/generic/generic/Makefile.inc b/src/drivers/generic/generic/Makefile.inc
index b7db25411d..37a873b117 100644
--- a/src/drivers/generic/generic/Makefile.inc
+++ b/src/drivers/generic/generic/Makefile.inc
@@ -1 +1 @@
-# Empty
+ramstage-$(CONFIG_DRIVERS_GENERIC_GENERIC) += generic.c
diff --git a/src/drivers/generic/generic/chip.h b/src/drivers/generic/generic/chip.h
new file mode 100644
index 0000000000..f3c54b687b
--- /dev/null
+++ b/src/drivers/generic/generic/chip.h
@@ -0,0 +1,48 @@
+/*
+ * 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.
+ */
+
+#ifndef __GENERIC_GENERIC_CHIP_H__
+#define __GENERIC_GENERIC_CHIP_H__
+
+#if IS_ENABLED(CONFIG_HAVE_ACPI_TABLES)
+
+#include <arch/acpi_device.h>
+
+#define MAX_GENERIC_PROPERTY_LIST 10
+
+struct drivers_generic_generic_config {
+ const char *hid; /* ACPI _HID (required) */
+ const char *cid; /* ACPI _CID */
+ const char *name; /* ACPI Device Name */
+ /*
+ * Autogenerated ACPI Device Name if name is not provided in
+ * devicetree.
+ */
+ char autogen_name[5];
+ const char *desc; /* ACPI _DDN */
+ unsigned int uid; /* ACPI _UID */
+
+ /* Generic properties for exporting device-specific data to the OS */
+ struct acpi_dp property_list[MAX_GENERIC_PROPERTY_LIST];
+ int property_count;
+};
+
+#else /* CONFIG_HAVE_ACPI_TABLES */
+
+struct drivers_generic_generic_config { };
+
+#endif /* !CONFIG_HAVE_ACPI_TABLES */
+
+#endif /* __GENERIC_GENERIC_CHIP_H__ */
diff --git a/src/drivers/generic/generic/generic.c b/src/drivers/generic/generic/generic.c
new file mode 100644
index 0000000000..37fbab5c61
--- /dev/null
+++ b/src/drivers/generic/generic/generic.c
@@ -0,0 +1,98 @@
+/*
+ * 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 <console/console.h>
+#include <device/device.h>
+#include <device/path.h>
+#include <stdint.h>
+#include <string.h>
+#include "chip.h"
+
+static void generic_dev_fill_ssdt_generator(struct device *dev)
+{
+ struct acpi_dp *dsd;
+ struct drivers_generic_generic_config *config = dev->chip_info;
+
+ if (!dev->enabled || !config)
+ return;
+
+ if (!config->hid) {
+ printk(BIOS_ERR, "%s: ERROR: _HID required\n", dev_path(dev));
+ return;
+ }
+
+ acpigen_write_scope(acpi_device_scope(dev));
+ acpigen_write_device(acpi_device_name(dev));
+ acpigen_write_name_string("_HID", config->hid);
+ if (config->cid)
+ acpigen_write_name_string("_CID", config->cid);
+ acpigen_write_name_integer("_UID", config->uid);
+ acpigen_write_name_string("_DDN", config->desc);
+ acpigen_write_STA(acpi_device_status(dev));
+
+ dsd = acpi_dp_new_table("_DSD");
+ acpi_dp_add_property_list(dsd, config->property_list,
+ config->property_count);
+ acpi_dp_write(dsd);
+
+ acpigen_pop_len(); /* Device */
+ acpigen_pop_len(); /* Scope */
+
+ printk(BIOS_INFO, "%s: %s at %s\n", acpi_device_path(dev),
+ config->desc ? : dev->chip_ops->name, dev_path(dev));
+}
+
+static char *generic_autogen_name(struct drivers_generic_generic_config *config)
+{
+ char *name = &config->autogen_name[0];
+ static unsigned int id;
+
+ if (name[0] != '\0')
+ return name;
+
+ snprintf(name, sizeof(name), "G%03.3X", id++);
+ name[4] = '\0';
+ return name;
+}
+
+static const char *generic_dev_acpi_name(const struct device *dev)
+{
+ struct drivers_generic_generic_config *config = dev->chip_info;
+
+ if (config->name)
+ return config->name;
+
+ return generic_autogen_name(config);
+}
+
+static struct device_operations generic_dev_ops = {
+ .read_resources = DEVICE_NOOP,
+ .set_resources = DEVICE_NOOP,
+ .enable_resources = DEVICE_NOOP,
+ .acpi_name = &generic_dev_acpi_name,
+ .acpi_fill_ssdt_generator = &generic_dev_fill_ssdt_generator,
+};
+
+static void generic_dev_enable(struct device *dev)
+{
+ dev->ops = &generic_dev_ops;
+}
+
+struct chip_operations drivers_generic_generic_ops = {
+ CHIP_NAME("Generic Device")
+ .enable_dev = &generic_dev_enable
+};