root/sound/pci/hda/patch_nvhdmi.c

DEFINITIONS

1. nvhdmi_build_controls
2. nvhdmi_init
3. nvhdmi_dig_playback_pcm_open
4. nvhdmi_dig_playback_pcm_close
5. nvhdmi_dig_playback_pcm_prepare
6. nvhdmi_build_pcms
7. nvhdmi_free
8. patch_nvhdmi

/*
 * Universal Interface for Intel High Definition Audio Codec
 *
 * HD audio interface patch for NVIDIA HDMI codecs
 *
 * Copyright (c) 2008 NVIDIA Corp.  All rights reserved.
 * Copyright (c) 2008 Wei Ni <wni@nvidia.com>
 *
 *
 *  This driver 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 driver 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/delay.h>
#include <linux/slab.h>
#include <sound/core.h>
#include "hda_codec.h"
#include "hda_local.h"

struct nvhdmi_spec {
        struct hda_multi_out multiout;

        struct hda_pcm pcm_rec;
};

static struct hda_verb nvhdmi_basic_init[] = {
        /* enable digital output on pin widget */
        { 0x05, AC_VERB_SET_PIN_WIDGET_CONTROL, PIN_OUT },
        {} /* terminator */
};

/*
 * Controls
 */
static int nvhdmi_build_controls(struct hda_codec *codec)
{
        struct nvhdmi_spec *spec = codec->spec;
        int err;

        err = snd_hda_create_spdif_out_ctls(codec, spec->multiout.dig_out_nid);
        if (err < 0)
                return err;

        return 0;
}

static int nvhdmi_init(struct hda_codec *codec)
{
        snd_hda_sequence_write(codec, nvhdmi_basic_init);
        return 0;
}

/*
 * Digital out
 */
static int nvhdmi_dig_playback_pcm_open(struct hda_pcm_stream *hinfo,
                                     struct hda_codec *codec,
                                     struct snd_pcm_substream *substream)
{
        struct nvhdmi_spec *spec = codec->spec;
        return snd_hda_multi_out_dig_open(codec, &spec->multiout);
}

static int nvhdmi_dig_playback_pcm_close(struct hda_pcm_stream *hinfo,
                                      struct hda_codec *codec,
                                      struct snd_pcm_substream *substream)
{
        struct nvhdmi_spec *spec = codec->spec;
        return snd_hda_multi_out_dig_close(codec, &spec->multiout);
}

static int nvhdmi_dig_playback_pcm_prepare(struct hda_pcm_stream *hinfo,
                                            struct hda_codec *codec,
                                            unsigned int stream_tag,
                                            unsigned int format,
                                            struct snd_pcm_substream *substream)
{
        struct nvhdmi_spec *spec = codec->spec;
        return snd_hda_multi_out_dig_prepare(codec, &spec->multiout, stream_tag,
                                             format, substream);
}

static struct hda_pcm_stream nvhdmi_pcm_digital_playback = {
        .substreams = 1,
        .channels_min = 2,
        .channels_max = 2,
        .nid = 0x4, /* NID to query formats and rates and setup streams */
        .rates = SNDRV_PCM_RATE_48000,
        .maxbps = 16,
        .formats = SNDRV_PCM_FMTBIT_S16_LE,
        .ops = {
                .open = nvhdmi_dig_playback_pcm_open,
                .close = nvhdmi_dig_playback_pcm_close,
                .prepare = nvhdmi_dig_playback_pcm_prepare
        },
};

static int nvhdmi_build_pcms(struct hda_codec *codec)
{
        struct nvhdmi_spec *spec = codec->spec;
        struct hda_pcm *info = &spec->pcm_rec;

        codec->num_pcms = 1;
        codec->pcm_info = info;

        info->name = "NVIDIA HDMI";
        info->stream[SNDRV_PCM_STREAM_PLAYBACK] = nvhdmi_pcm_digital_playback;

        return 0;
}

static void nvhdmi_free(struct hda_codec *codec)
{
        kfree(codec->spec);
}

static struct hda_codec_ops nvhdmi_patch_ops = {
        .build_controls = nvhdmi_build_controls,
        .build_pcms = nvhdmi_build_pcms,
        .init = nvhdmi_init,
        .free = nvhdmi_free,
};

static int patch_nvhdmi(struct hda_codec *codec)
{
        struct nvhdmi_spec *spec;

        spec = kzalloc(sizeof(*spec), GFP_KERNEL);
        if (spec == NULL)
                return -ENOMEM;

        codec->spec = spec;

        spec->multiout.num_dacs = 0;      /* no analog */
        spec->multiout.max_channels = 2;
        spec->multiout.dig_out_nid = 0x4; /* NID for copying analog to digital,
                                           * seems to be unused in pure-digital
                                           * case. */

        codec->patch_ops = nvhdmi_patch_ops;

        return 0;
}

/*
 * patch entries
 */
struct hda_codec_preset snd_hda_preset_nvhdmi[] = {
        { .id = 0x10de0002, .name = "NVIDIA MCP78 HDMI", .patch = patch_nvhdmi },
        { .id = 0x10de0007, .name = "NVIDIA MCP7A HDMI", .patch = patch_nvhdmi },
        {} /* terminator */
};