superio/common: Add ssdtgen for generic SuperIOs

Add a generic SuperIO ACPI generator, dropping the need to include
additional code in DSDT for SuperIO.

It generates a device HID based on the decoded I/O range.

Tested on Supermicro X11SSH-TF using AST2400.
The SSDT contains no errors and all devices are present.

Possible TODOs:
* Add "enter config" and "exit config" bytes
* Generate support methods to enter and exit config mode
* Generate support methods to query, change or disable current
  resource settings on specific LDNs

Change-Id: I2716ae0580d68e5d4fcc484cb1648a2cdc1f4ca0
Signed-off-by: Patrick Rudolph <patrick.rudolph@9elements.com>
Reviewed-on: https://review.coreboot.org/c/coreboot/+/33033
Tested-by: build bot (Jenkins) <no-reply@coreboot.org>
Reviewed-by: Felix Held <felix-coreboot@felixheld.de>

1 files changed, 23 insertions, 0 deletions

diff --git a/src/superio/common/ssdt.h b/src/superio/common/ssdt.h
new file mode 100644
index 0000000000..8c63742798
--- /dev/null
+++ b/src/superio/common/ssdt.h
@@ -0,0 +1,23 @@
+/*
+ * This file is part of the coreboot project.
+ *
+ * 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; either version 2 of the License, or
+ * (at your option) any later version.
+ *
+ * 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 __SUPERIO_COMMON_SSDT_H__
+#define __SUPERIO_COMMON_SSDT_H__
+
+#include <device/device.h>
+
+const char *superio_common_ldn_acpi_name(const struct device *dev);
+void superio_common_fill_ssdt_generator(struct device *dev);
+
+#endif /* __SUPERIO_COMMON_SSDT_H__ */