V4L/DVB (7786): cx18: new driver for the Conexant CX23418 MPEG encode…

…r chip

Many thanks to Steve Toth from Hauppauge and Nattu Dakshinamurthy from
Conexant for their support. I am in particular thankful to Hauppauge
since without their help this driver would not exist. It should also
be noted that Steve did the work to get the DVB part up and running.
Thank you!

Signed-off-by: Hans Verkuil <[email protected]>
Signed-off-by: Steven Toth <[email protected]>
Signed-off-by: Michael Krufky <[email protected]>
Signed-off-by: G. Andrew Walls <[email protected]>
Signed-off-by: Mauro Carvalho Chehab <[email protected]>

Documentation/video4linux/cx18.txt

@@ -0,0 +1,34 @@
+Some notes regarding the cx18 driver for the Conexant CX23418 MPEG
+encoder chip:
+
+1) The only hardware currently supported is the Hauppauge HVR-1600.
+
+2) Some people have problems getting the i2c bus to work. Cause unknown.
+   The symptom is that the eeprom cannot be read and the card is
+   unusable.
+
+3) The audio from the analog tuner is mono only. Probably caused by
+   incorrect audio register information in the datasheet. We are
+   waiting for updated information from Conexant.
+
+4) VBI (raw or sliced) has not yet been implemented.
+
+5) MPEG indexing is not yet implemented.
+
+6) The driver is still a bit rough around the edges, this should
+   improve over time.
+
+
+Firmware:
+
+The firmware needs to be extracted from the Windows Hauppauge HVR-1600
+driver, available here:
+
+http://hauppauge.lightpath.net/software/install_cd/hauppauge_cd_3.4d1.zip
+
+Unzip, then copy the following files to the firmware directory
+and rename them as follows:
+
+Drivers/Driver18/hcw18apu.rom -> v4l-cx23418-apu.fw
+Drivers/Driver18/hcw18enc.rom -> v4l-cx23418-cpu.fw
+Drivers/Driver18/hcw18mlC.rom -> v4l-cx23418-dig.fw

drivers/media/video/Kconfig

@@ -748,6 +748,8 @@ source "drivers/media/video/au0828/Kconfig"
 
 source "drivers/media/video/ivtv/Kconfig"
 
+source "drivers/media/video/cx18/Kconfig"
+
 config VIDEO_M32R_AR
 	tristate "AR devices"
 	depends on M32R && VIDEO_V4L1

drivers/media/video/Makefile

@@ -124,6 +124,7 @@ obj-$(CONFIG_USB_VICAM)         += usbvideo/
 obj-$(CONFIG_USB_QUICKCAM_MESSENGER)	+= usbvideo/
 
 obj-$(CONFIG_VIDEO_IVTV) += ivtv/
+obj-$(CONFIG_VIDEO_CX18) += cx18/
 
 obj-$(CONFIG_VIDEO_VIVI) += vivi.o
 obj-$(CONFIG_VIDEO_CX23885) += cx23885/

drivers/media/video/cx18/Kconfig

@@ -0,0 +1,20 @@
+config VIDEO_CX18
+	tristate "Conexant cx23418 MPEG encoder support"
+	depends on VIDEO_V4L2 && DVB_CORE && PCI && I2C && EXPERIMENTAL
+	select I2C_ALGOBIT
+	select FW_LOADER
+	select VIDEO_IR
+	select VIDEO_TUNER
+	select VIDEO_TVEEPROM
+	select VIDEO_CX2341X
+	select VIDEO_CS5345
+	select DVB_S5H1409
+	---help---
+	  This is a video4linux driver for Conexant cx23418 based
+	  PCI combo video recorder devices.
+
+	  This is used in devices such as the Hauppauge HVR-1600
+	  cards.
+
+	  To compile this driver as a module, choose M here: the
+	  module will be called cx18.

drivers/media/video/cx18/Makefile

@@ -0,0 +1,11 @@
+cx18-objs    := cx18-driver.o cx18-cards.o cx18-i2c.o cx18-firmware.o cx18-gpio.o \
+	cx18-queue.o cx18-streams.o cx18-fileops.o cx18-ioctl.o cx18-controls.o \
+	cx18-mailbox.o cx18-vbi.o cx18-audio.o cx18-video.o cx18-irq.o \
+	cx18-av-core.o cx18-av-audio.o cx18-av-firmware.o cx18-av-vbi.o cx18-scb.o \
+	cx18-dvb.o
+
+obj-$(CONFIG_VIDEO_CX18) += cx18.o
+
+EXTRA_CFLAGS += -Idrivers/media/dvb/dvb-core
+EXTRA_CFLAGS += -Idrivers/media/dvb/frontends
+EXTRA_CFLAGS += -Idrivers/media/common/tuners

drivers/media/video/cx18/cx18-audio.c

@@ -0,0 +1,73 @@
+/*
+ *  cx18 audio-related functions
+ *
+ *  Derived from ivtv-audio.c
+ *
+ *  Copyright (C) 2007  Hans Verkuil <[email protected]>
+ *
+ *  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., 59 Temple Place, Suite 330, Boston, MA
+ *  02111-1307  USA
+ */
+
+#include "cx18-driver.h"
+#include "cx18-i2c.h"
+#include "cx18-cards.h"
+#include "cx18-audio.h"
+
+/* Selects the audio input and output according to the current
+   settings. */
+int cx18_audio_set_io(struct cx18 *cx)
+{
+	struct v4l2_routing route;
+	u32 audio_input;
+	int mux_input;
+
+	/* Determine which input to use */
+	if (test_bit(CX18_F_I_RADIO_USER, &cx->i_flags)) {
+		audio_input = cx->card->radio_input.audio_input;
+		mux_input = cx->card->radio_input.muxer_input;
+	} else {
+		audio_input =
+			cx->card->audio_inputs[cx->audio_input].audio_input;
+		mux_input =
+			cx->card->audio_inputs[cx->audio_input].muxer_input;
+	}
+
+	/* handle muxer chips */
+	route.input = mux_input;
+	route.output = 0;
+	cx18_i2c_hw(cx, cx->card->hw_muxer, VIDIOC_INT_S_AUDIO_ROUTING, &route);
+
+	route.input = audio_input;
+	return cx18_i2c_hw(cx, cx->card->hw_audio_ctrl,
+			VIDIOC_INT_S_AUDIO_ROUTING, &route);
+}
+
+void cx18_audio_set_route(struct cx18 *cx, struct v4l2_routing *route)
+{
+	cx18_i2c_hw(cx, cx->card->hw_audio_ctrl,
+			VIDIOC_INT_S_AUDIO_ROUTING, route);
+}
+
+void cx18_audio_set_audio_clock_freq(struct cx18 *cx, u8 freq)
+{
+	static u32 freqs[3] = { 44100, 48000, 32000 };
+
+	/* The audio clock of the digitizer must match the codec sample
+	   rate otherwise you get some very strange effects. */
+	if (freq > 2)
+		return;
+	cx18_call_i2c_clients(cx, VIDIOC_INT_AUDIO_CLOCK_FREQ, &freqs[freq]);
+}

drivers/media/video/cx18/cx18-audio.h

@@ -0,0 +1,26 @@
+/*
+ *  cx18 audio-related functions
+ *
+ *  Derived from ivtv-audio.c
+ *
+ *  Copyright (C) 2007  Hans Verkuil <[email protected]>
+ *
+ *  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., 59 Temple Place, Suite 330, Boston, MA
+ *  02111-1307  USA
+ */
+
+int cx18_audio_set_io(struct cx18 *cx);
+void cx18_audio_set_route(struct cx18 *cx, struct v4l2_routing *route);
+void cx18_audio_set_audio_clock_freq(struct cx18 *cx, u8 freq);