V4L/DVB: cx18-alsa: Add non-working cx18-alsa-pcm.[ch] files to avoid data loss

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

drivers/media/video/cx18/cx18-alsa-pcm.c

+/*
+ *  ALSA PCM device for the
+ *  ALSA interface to cx18 PCM capture streams
+ *
+ *  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., 59 Temple Place, Suite 330, Boston, MA
+ *  02111-1307  USA
+ */
+
+#include <linux/init.h>
+#include <linux/kernel.h>
+
+#include <media/v4l2-device.h>
+
+#include <sound/core.h>
+#include <sound/pcm.h>
+
+#include "cx18-driver.h"
+#include "cx18-alsa.h"
+
+static int snd_cx18_pcm_capture_open(struct snd_pcm_substream *substream)
+{
+	struct snd_cx18_card *cxsc = snd_pcm_substream_chip(substream);
+	struct snd_pcm_runtime *runtime = substream->runtime;
+	struct v4l2_device *v4l2_dev = cxsc->v4l2_dev;
+	struct snd_card *sc = cxsc->sc;
+	struct cx18 *cx = to_cx18(v4l2_dev);
+	return 0;
+}
+
+static int snd_cx18_pcm_capture_close(struct snd_pcm_substream *substream)
+{
+	return 0;
+}
+
+static int snd_cx18_pcm_ioctl(struct snd_pcm_substream *substream,
+		     unsigned int cmd, void *arg)
+{
+	return snd_pcm_lib_ioctl(substream, cmd, arg);
+}
+
+static int snd_cx18_pcm_hw_params(struct snd_pcm_substream *substream,
+			 struct snd_pcm_hw_params *params)
+{
+	return 0;
+}
+
+static int snd_cx18_pcm_hw_free(struct snd_pcm_substream *substream)
+{
+	return 0;
+}
+
+static int snd_cx18_pcm_prepare(struct snd_pcm_substream *substream)
+{
+	return 0;
+}
+
+static int snd_cx18_pcm_trigger(struct snd_pcm_substream *substream, int cmd)
+{
+	return 0;
+}
+
+static
+snd_pcm_uframes_t snd_cx18_pcm_pointer(struct snd_pcm_substream *substream)
+{
+	return 0;
+}
+
+static struct snd_pcm_ops snd_cx18_pcm_capture_ops = {
+	.open		= snd_cx18_pcm_capture_open,
+	.close		= snd_cx18_pcm_capture_close,
+	.ioctl		= snd_cx18_pcm_ioctl,
+	.hw_params	= snd_cx18_pcm_hw_params,
+	.hw_free	= snd_cx18_pcm_hw_free,
+	.prepare	= snd_cx18_pcm_prepare,
+	.trigger	= snd_cx18_pcm_trigger,
+	.pointer	= snd_cx18_pcm_pointer,
+};
+
+int __init snd_cx18_pcm_create(struct snd_cx18_card *cxsc)
+{
+	struct snd_pcm *sp;
+	struct snd_card *sc = cxsc->sc;
+	struct v4l2_device *v4l2_dev = cxsc->v4l2_dev;
+	struct cx18 *cx = to_cx18(v4l2_dev);
+	int ret;
+
+	ret = snd_pcm_new(sc, "CX23418 PCM",
+			  0, /* PCM device 0, the only one for this card */
+			  0, /* 0 playback substreams */
+			  1, /* 1 capture substream */
+			  &sp);
+	if (ret) {
+		CX18_ALSA_ERR("%s: snd_cx18_pcm_create() failed with err %d\n",
+			      __func__, ret);
+		goto err_exit;
+	}
+	return 0;
+
+err_exit:
+	return ret;
+}

drivers/media/video/cx18/cx18-alsa-pcm.h

+/*
+ *  ALSA PCM device for the
+ *  ALSA interface to cx18 PCM capture streams
+ *
+ *  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., 59 Temple Place, Suite 330, Boston, MA
+ *  02111-1307  USA
+ */
+
+int __init snd_cx18_pcm_create(struct snd_cx18_card *cxsc);