V4L/DVB (13100): cx23885: Add IR input keypress handling and enable for the HVR-1850

This changes adds IR Rx keypress input event handling to the CX23885 module.
This change specifically only adds input handling for IR devices implemented as
v4l2_subdevices, using only the pulse width mode (for now), and only with
RC-5 remotes.  The V4L-DVB infrastructure is missing too much to support RC-6
mode 6A as used in many media center remotes.   The grey Hauppauge RC-5 remote
and HVR-1850 IR receiver work now.
Signed-off-by: Andy Walls <awalls@radix.net>
Signed-off-by: Mauro Carvalho Chehab <mchehab@redhat.com>

drivers/media/video/cx23885/Makefile

 cx23885-objs	:= cx23885-cards.o cx23885-video.o cx23885-vbi.o \
 		    cx23885-core.o cx23885-i2c.o cx23885-dvb.o cx23885-417.o \
-		    cx23885-ioctl.o cx23885-ir.o cx23888-ir.o \
+		    cx23885-ioctl.o cx23885-ir.o cx23885-input.o cx23888-ir.o \
 		    netup-init.o cimax2.o netup-eeprom.o
 
 obj-$(CONFIG_VIDEO_CX23885) += cx23885.o

drivers/media/video/cx23885/cx23885-core.c

@@ -34,6 +34,7 @@
 #include "cimax2.h"
 #include "cx23888-ir.h"
 #include "cx23885-ir.h"
+#include "cx23885-input.h"
 
 MODULE_DESCRIPTION("Driver for cx23885 based TV cards");
 MODULE_AUTHOR("Steven Toth <stoth@linuxtv.org>");
@@ -1959,6 +1960,7 @@ static int __devinit cx23885_initdev(struct pci_dev *pci_dev,
 	 * is hooked up by the call to request_irq() above.
 	 */
 	cx23885_ir_pci_int_enable(dev);
+	cx23885_input_init(dev);
 
 	return 0;
 
@@ -1976,6 +1978,7 @@ static void __devexit cx23885_finidev(struct pci_dev *pci_dev)
 	struct v4l2_device *v4l2_dev = pci_get_drvdata(pci_dev);
 	struct cx23885_dev *dev = to_cx23885(v4l2_dev);
 
+	cx23885_input_fini(dev);
 	cx23885_ir_fini(dev);
 
 	cx23885_shutdown(dev);

drivers/media/video/cx23885/cx23885-input.h

+/*
+ *  Driver for the Conexant CX23885/7/8 PCIe bridge
+ *
+ *  Infrared remote control input device
+ *
+ *  Copyright (C) 2009  Andy Walls <awalls@radix.net>
+ *
+ *  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.
+ *
+ *  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 Street, Fifth Floor, Boston, MA
+ *  02110-1301, USA.
+ */
+
+#ifndef _CX23885_INPUT_H_
+#define _CX23885_INPUT_H_
+int cx23885_input_rx_work_handler(struct cx23885_dev *dev, u32 events);
+
+int cx23885_input_init(struct cx23885_dev *dev);
+void cx23885_input_fini(struct cx23885_dev *dev);
+#endif

drivers/media/video/cx23885/cx23885-ir.c

@@ -24,6 +24,7 @@
 #include <media/v4l2-device.h>
 
 #include "cx23885.h"
+#include "cx23885-input.h"
 
 #define CX23885_IR_RX_FIFO_SERVICE_REQ		0
 #define CX23885_IR_RX_END_OF_RX_DETECTED	1
@@ -51,6 +52,9 @@ void cx23885_ir_rx_work_handler(struct work_struct *work)
 
 	if (events == 0)
 		return;
+
+	if (dev->ir_input)
+		cx23885_input_rx_work_handler(dev, events);
 }
 
 void cx23885_ir_tx_work_handler(struct work_struct *work)

drivers/media/video/cx23885/cx23885.h

@@ -363,6 +363,9 @@ struct cx23885_dev {
 	struct work_struct	   ir_tx_work;
 	unsigned long		   ir_tx_notifications;
 
+	struct card_ir		   *ir_input;
+	atomic_t		   ir_input_stopping;
+
 	/* V4l */
 	u32                        freq;
 	struct video_device        *video_dev;