Start ACPI framework for PnP (super i/o) devices

I'm trying to make writing ACPI code for super i/o devices more
comfortable.

pnp.asl hosts some general cpp macros.

The other four files are to be included in dsdt trees. They are
controlled by cpp macros which should be defined/undefined before
inclusion.

Work was inspired by Christoph Grenz' ACPI code for the W83627HF.

Change-Id: Idb55332ba9bc788c98964d30a450e0d734cf28ec
Signed-off-by: Nico Huber <nico.huber@secunet.com>
Reviewed-on: http://review.coreboot.org/3286
Tested-by: build bot (Jenkins)
Reviewed-by: Paul Menzel <paulepanter@users.sourceforge.net>
Reviewed-by: Stefan Reinauer <stefan.reinauer@coreboot.org>

1 files changed, 134 insertions, 0 deletions

diff --git a/src/superio/acpi/pnp_uart.asl b/src/superio/acpi/pnp_uart.asl
new file mode 100644
index 0000000000..c826106ea8
--- /dev/null
+++ b/src/superio/acpi/pnp_uart.asl
@@ -0,0 +1,134 @@
+/*
+ * This file is part of the coreboot project.
+ *
+ * Copyright (C) 2011 Christoph Grenz <christophg+cb@grenz-bonn.de>
+ * Copyright (C) 2013 secunet Security Networks AG
+ *
+ * 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.
+ *
+ * You should have received a copy of the GNU General Public License
+ * along with this program; if not, write to the Free Software
+ * Foundation, Inc., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301 USA
+ */
+
+/* ========================== UART ========================== */
+
+/*
+ * Generic setup for 16550A compatible UARTs.
+ *
+ * Controlled by the following preprocessor defines:
+ *
+ * SUPERIO_CHIP_NAME	The name of the super i/o chip (unique, required)
+ * SUPERIO_UART_LDN	The logical device number on the super i/o
+ *			chip for this UART (required)
+ * SUPERIO_UART_DDN	A string literal that identifies the dos device
+ *                      name (DDN) of this uart (e.g. "COM1", optional)
+ * SUPERIO_UART_PM_REG	Identifier of a 1-bit register to power down
+ *			the UART (optional)
+ * SUPERIO_UART_PM_LDN  The logical device number to access the PM_REG
+ *			bit (required if SUPERIO_UART_PM_REG is defined)
+ */
+
+#include "pnp.asl"
+
+#ifndef SUPERIO_CHIP_NAME
+# error "SUPERIO_CHIP_NAME is not defined."
+#endif
+
+#ifndef SUPERIO_UART_LDN
+# error "SUPERIO_UART_LDN is not defined."
+#endif
+
+Device (SUPERIO_ID(SER, SUPERIO_UART_LDN)) {
+	Name (_HID, EisaId ("PNP0501"))
+	Name (_UID, SUPERIO_UID(SER, SUPERIO_UART_LDN))
+	#ifdef SUPERIO_UART_DDN
+	Name (_DDN, SUPERIO_UART_DDN)
+	#endif
+
+	Method (_STA)
+	{
+		PNP_GENERIC_STA(SUPERIO_UART_LDN)
+	}
+
+	Method (_DIS)
+	{
+		PNP_GENERIC_DIS(SUPERIO_UART_LDN)
+	}
+
+#ifdef SUPERIO_UART_PM_REG
+	Method (_PSC) {
+		PNP_GENERIC_PSC(SUPERIO_UART_PM_REG, SUPERIO_UART_PM_LDN)
+	}
+
+	Method (_PS0) {
+		PNP_GENERIC_PS0(SUPERIO_UART_PM_REG, SUPERIO_UART_PM_LDN)
+	}
+
+	Method (_PS1) {
+		PNP_GENERIC_PS1(SUPERIO_UART_PM_REG, SUPERIO_UART_PM_LDN)
+	}
+#else
+	Method (_PSC) {
+		PNP_DEFAULT_PSC
+	}
+#endif
+
+	Method (_CRS)
+	{
+		Name (CRS, ResourceTemplate () {
+			IO (Decode16, 0x0000, 0x0000, 0x08, 0x08, IO0)
+			IRQNoFlags (IR0) {}
+		})
+		ENTER_CONFIG_MODE (SUPERIO_UART_LDN)
+		  PNP_READ_IO(PNP_IO0, CRS, IO0)
+		  PNP_READ_IRQ(PNP_IRQ0, CRS, IR0)
+		EXIT_CONFIG_MODE ()
+		Return (CRS)
+	}
+
+	Name (_PRS, ResourceTemplate ()
+	{
+		StartDependentFn (0,0) {
+			IO (Decode16, 0x03f8, 0x03f8, 0x08, 0x08)
+			IRQNoFlags () {3,4,5,7,9,10,11,12}
+		}
+		StartDependentFn (0,0) {
+			IO (Decode16, 0x02f8, 0x02f8, 0x08, 0x08)
+			IRQNoFlags () {3,4,5,7,9,10,11,12}
+		}
+		StartDependentFn (1,0) {
+			IO (Decode16, 0x03e8, 0x03e8, 0x08, 0x08)
+			IRQNoFlags () {3,4,5,7,9,10,11,12}
+		}
+		StartDependentFn (1,0) {
+			IO (Decode16, 0x02e8, 0x02e8, 0x08, 0x08)
+			IRQNoFlags () {3,4,5,7,9,10,11,12}
+		}
+		StartDependentFn (2,0) {
+			IO (Decode16, 0x0100, 0x0ff8, 0x08, 0x08)
+			IRQNoFlags () {3,4,5,7,9,10,11,12}
+		}
+		EndDependentFn()
+	})
+
+	Method (_SRS, 1, Serialized)
+	{
+		Name (TMPL, ResourceTemplate () {
+			IO (Decode16, 0x0000, 0x0000, 0x00, 0x00, IO0)
+			IRQNoFlags (IR0) {}
+		})
+		ENTER_CONFIG_MODE (SUPERIO_UART_LDN)
+		  PNP_WRITE_IO(PNP_IO0, Arg0, IO0)
+		  PNP_WRITE_IRQ(PNP_IRQ0, Arg0, IR0)
+		  Store (One, PNP_DEVICE_ACTIVE)
+		EXIT_CONFIG_MODE ()
+	}
+}