[media] ivtv, ivtv-alsa: Add initial ivtv-alsa interface driver for ivtv

This is a cut-and-paste port of the cx18-alsa driver to
create an ivtv-alsa interface module for the ivtv driver.
It is not actually hooked-up to the PCM stream DMA buffers
from the ivtv driver yet.  That will be done in a coming change,
since that portion is so very different from the cx18 driver.
This code has all or more of the bugs and shortcomings of the
cx18-alsa interface driver: inconsistent use of itvsc->slock,
ivtv-alsa-mixer.c is dead code, assumes 48 ksps regardless
of the actual setting of the audio capture, problems with
proper struct ivtv and struct ivtv_stream housekeeping,
struct ivtv_open_id.v4l2_fh abuse, and $DIETY knows what else.

Signed-off-by: Andy Walls <awalls@md.metrocast.net>
Signed-off-by: Mauro Carvalho Chehab <mchehab@redhat.com>

1 files changed, 11 insertions, 0 deletions

diff --git a/drivers/media/pci/ivtv/Kconfig b/drivers/media/pci/ivtv/Kconfig
index 89f65914cc8e..3906b883e2bc 100644
--- a/drivers/media/pci/ivtv/Kconfig
+++ b/drivers/media/pci/ivtv/Kconfig
@@ -28,6 +28,17 @@ config VIDEO_IVTV
 	  To compile this driver as a module, choose M here: the
 	  module will be called ivtv.
 
+config VIDEO_IVTV_ALSA
+	tristate "Conexant cx23415/cx23416 PCM audio capture support"
+	depends on VIDEO_IVTV && SND && EXPERIMENTAL
+	select SND_PCM
+	---help---
+	  This is an ALSA interface driver for direct PCM audio capture from
+	  Conexant cx23415/cx23416 based PCI TV cards using the ivtv driver.
+
+	  To compile this driver as a module, choose M here: the
+	  module will be called ivtv-alsa.
+
 config VIDEO_FB_IVTV
 	tristate "Conexant cx23415 framebuffer support"
 	depends on VIDEO_IVTV && FB