Change in coreboot[master]: superio/nuvoton/nct6776/acpi: Add parallel port support

[Tristan Corrick (Code Review)]

Tristan Corrick has uploaded this change for review. ( https://review.coreboot.org/27795

Change subject: superio/nuvoton/nct6776/acpi: Add parallel port support
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superio/nuvoton/nct6776/acpi: Add parallel port support

Exposing the parallel port via ACPI causes Linux to automatically detect
the parallel port and load the appropriate modules. Tested on an ASUS
P8H61-M LX with Linux 4.9.110 and 4.17.8.

However, no parallel port device has been tested.

Change-Id: I2529a074e24433d093ad0650a45c7b29238620f3
Signed-off-by: Tristan Corrick 
---
M src/superio/nuvoton/nct6776/acpi/superio.asl
1 file changed, 30 insertions(+), 0 deletions(-)

git pull ssh://review.coreboot.org:29418/coreboot refs/changes/95/27795/1

diff --git a/src/superio/nuvoton/nct6776/acpi/superio.asl b/src/superio/nuvoton/nct6776/acpi/superio.asl
index b985115..980eab9 100644
--- a/src/superio/nuvoton/nct6776/acpi/superio.asl
+++ b/src/superio/nuvoton/nct6776/acpi/superio.asl
@@ -23,6 +23,7 @@
  * devices, disabling and reenabling logical devices.
  *
  *   LDN		State
+ * 0x1 PP		Implemented, untested
  * 0x2 SP1		Implemented, untested
  * 0x5 KBC		Implemented, untested
  * 0x8 GPIO		Implemented, untested
@@ -31,6 +32,7 @@
  * Controllable through preprocessor defines:
  * SUPERIO_DEV		Device identifier for this SIO (e.g. SIO0)
  * SUPERIO_PNP_BASE	I/O address of the first PnP configuration register
+ * NCT6776_SHOW_PP	If defined, the parallel port will be exposed.
  * NCT6776_SHOW_SP1	If defined, Serial Port 1 will be exposed.
  * NCT6776_SHOW_KBC	If defined, the Keyboard Controller will be exposed.
  * NCT6776_SHOW_GPIO	If defined, GPIO support will be exposed.
@@ -85,6 +87,8 @@
    	PNP_IRQ0,		8, /* First IRQ */
    	Offset (0x72),
    	PNP_IRQ1,		8, /* Second IRQ */
+		Offset (0x74),
+		PNP_DMA0,		8, /* DRQ */
    }

Method (_CRS)
@@ -107,6 +111,32 @@
    #define PNP_EXIT_MAGIC_1ST	0xaa
    #include <superio/acpi/pnp_config.asl>

+#ifdef NCT6776_SHOW_PP
+	#undef SUPERIO_PNP_HID
+	#undef SUPERIO_PNP_LDN
+	#undef SUPERIO_PNP_DDN
+	#undef SUPERIO_PNP_PM_REG
+	#undef SUPERIO_PNP_PM_VAL
+	#undef SUPERIO_PNP_PM_LDN
+	#undef SUPERIO_PNP_IO0
+	#undef SUPERIO_PNP_IO1
+	#undef SUPERIO_PNP_IO2
+	#undef SUPERIO_PNP_IRQ0
+	#undef SUPERIO_PNP_IRQ1
+	#undef SUPERIO_PNP_DMA
+	/*
+	 * The extra code required to dynamically reflect ECP in the HID
+	 * isn't currently justified, so the HID is hardcoded as not
+	 * using ECP. "PNP0401" would indicate ECP.
+	 */
+	#define SUPERIO_PNP_HID "PNP0400"
+	#define SUPERIO_PNP_LDN 1
+	#define SUPERIO_PNP_IO0 0x08, 0x08
+	#define SUPERIO_PNP_IRQ0
+	#define SUPERIO_PNP_DMA
+	#include <superio/acpi/pnp_generic.asl>
+#endif
+
 #ifdef NCT6776_SHOW_SP1
    #undef SUPERIO_UART_LDN
    #undef SUPERIO_UART_DDN