IR: add driver for Nuvoton w836x7hg integrated CIR

This is a new ir-core pnp driver for the Nuvoton w836x7hg integrated CIR function. The chip is found on at least the ASRock ION 330HT boxes and apparently, on a number of Intel DP55-series motherboards:

http://www.asrock.com/nettop/overview.asp?Model=ION%20330HT
http://downloadcenter.intel.com/Detail_Desc.aspx?agr=Y&DwnldID=17685&lang=eng

This driver was made possible by a hardware donation from Nuvoton, along with sample code (in the form of an lirc driver) and datasheet, so huge thanks to them for supporting this effort. Note that this driver constitutes a massive rewrite, porting from the lirc interfaces to the ir-core interfaces, and restructuring the driver to look more like Maxim Levitsky's ene_ir driver (as well as generally making it look more like kernel code).

There's some work left to be done on this driver, to fully support the range of functionality possible, but receive and IR power-on/wake are both functional (may require setting wake key under another OS atm). The hardware I've got (one of the ASRock boxes) only supports RX, so TX is completely untested as of yet. Certain RX parameters, like sample resolution and RX IRQ sample length trigger level could possibly stand to be made tweakable via modparams or sysfs nodes, but the current values work well enough for me w/an MCE RC6A remote.

The original lirc driver carried support for the Windows MCE IR keyboard/mouse device, which I plan to add back generically, in a way that should be usable by any raw IR receiver (or at least by this driver and the mceusb driver).

Suspend and resume have also been tested, the power button on my remote can be used to wake the machine, and CIR functionality resumes just fine. Module unload/reload has also been tested, though not extensively or repetitively. Also tested to work with the lirc bridge plugin for userspace decoding.

---
 drivers/media/IR/Kconfig       |   13 +
 drivers/media/IR/Makefile      |    1 +
 drivers/media/IR/nuvoton-cir.c | 1216 ++++++++++++++++++++++++++++++++++++++++
 drivers/media/IR/nuvoton-cir.h |  408 ++++++++++++++
 4 files changed, 1638 insertions(+), 0 deletions(-)
 create mode 100644 drivers/media/IR/nuvoton-cir.c
 create mode 100644 drivers/media/IR/nuvoton-cir.h

index 152000d..364514a 100644
@@ -113,6 +113,19 @@ config IR_IMON
 	   To compile this driver as a module, choose M here: the
 	   module will be called imon.
 
+config IR_NUVOTON
+	tristate "Nuvoton w836x7hg Consumer Infrared Transceiver"
+	depends on PNP
+	depends on IR_CORE
+	---help---
+	   Say Y here to enable support for integrated infrared receiver
+	   /transciever made by Nuvoton (formerly Winbond). This chip is
+	   found in the ASRock ION 330HT, as well as assorted Intel
+	   DP55-series motherboards (and of course, possibly others).
+
+	   To compile this driver as a module, choose M here: the
+	   module will be called nuvoton-cir.
+
 config IR_MCEUSB
 	tristate "Windows Media Center Ed. eHome Infrared Transceiver"
 	depends on USB_ARCH_HAS_HCD

index 953c6c4..f9574ad 100644
@@ -17,5 +17,6 @@ obj-$(CONFIG_IR_LIRC_CODEC) += ir-lirc-codec.o
 # stand-alone IR receivers/transmitters
 obj-$(CONFIG_IR_IMON) += imon.o
 obj-$(CONFIG_IR_MCEUSB) += mceusb.o
+obj-$(CONFIG_IR_NUVOTON) += nuvoton-cir.o
 obj-$(CONFIG_IR_ENE) += ene_ir.o
 obj-$(CONFIG_IR_STREAMZAP) += streamzap.o

1.7.1

-- 
Jarod Wilson
[email protected]