| /* |
| * 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; |
| } |