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patch_nvhdmi.c

/*
 * 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;
};

#define Nv_VERB_SET_Channel_Allocation          0xF79
#define Nv_VERB_SET_Info_Frame_Checksum         0xF7A
#define Nv_VERB_SET_Audio_Protection_On         0xF98
#define Nv_VERB_SET_Audio_Protection_Off        0xF99

#define Nv_Master_Convert_nid   0x04
#define Nv_Master_Pin_nid       0x05

static hda_nid_t nvhdmi_convert_nids[4] = {
      /*front, rear, clfe, rear_surr */
      0x6, 0x8, 0xa, 0xc,
};

static struct hda_verb nvhdmi_basic_init[] = {
      /* set audio protect on */
      { 0x1, Nv_VERB_SET_Audio_Protection_On, 0x1},
      /* enable digital output on pin widget */
      { 0x5, AC_VERB_SET_PIN_WIDGET_CONTROL, PIN_OUT | 0x5 },
      { 0x7, AC_VERB_SET_PIN_WIDGET_CONTROL, PIN_OUT | 0x5 },
      { 0x9, AC_VERB_SET_PIN_WIDGET_CONTROL, PIN_OUT | 0x5 },
      { 0xb, AC_VERB_SET_PIN_WIDGET_CONTROL, PIN_OUT | 0x5 },
      { 0xd, AC_VERB_SET_PIN_WIDGET_CONTROL, PIN_OUT | 0x5 },
      {} /* 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_8ch(struct hda_pcm_stream *hinfo,
                              struct hda_codec *codec,
                              struct snd_pcm_substream *substream)
{
      struct nvhdmi_spec *spec = codec->spec;
      int i;

      snd_hda_codec_write(codec, Nv_Master_Convert_nid,
                  0, AC_VERB_SET_CHANNEL_STREAMID, 0);
      for (i = 0; i < 4; i++) {
            /* set the stream id */
            snd_hda_codec_write(codec, nvhdmi_convert_nids[i], 0,
                        AC_VERB_SET_CHANNEL_STREAMID, 0);
            /* set the stream format */
            snd_hda_codec_write(codec, nvhdmi_convert_nids[i], 0,
                        AC_VERB_SET_STREAM_FORMAT, 0);
      }

      return snd_hda_multi_out_dig_close(codec, &spec->multiout);
}

static int nvhdmi_dig_playback_pcm_close_2ch(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_8ch(struct hda_pcm_stream *hinfo,
                              struct hda_codec *codec,
                              unsigned int stream_tag,
                              unsigned int format,
                              struct snd_pcm_substream *substream)
{
      int chs;
      unsigned int dataDCC1, dataDCC2, chan, chanmask, channel_id;
      int i;

      mutex_lock(&codec->spdif_mutex);

      chs = substream->runtime->channels;
      chan = chs ? (chs - 1) : 1;

      switch (chs) {
      default:
      case 0:
      case 2:
            chanmask = 0x00;
            break;
      case 4:
            chanmask = 0x08;
            break;
      case 6:
            chanmask = 0x0b;
            break;
      case 8:
            chanmask = 0x13;
            break;
      }
      dataDCC1 = AC_DIG1_ENABLE | AC_DIG1_COPYRIGHT;
      dataDCC2 = 0x2;

      /* set the Audio InforFrame Channel Allocation */
      snd_hda_codec_write(codec, 0x1, 0,
                  Nv_VERB_SET_Channel_Allocation, chanmask);

      /* turn off SPDIF once; otherwise the IEC958 bits won't be updated */
      if (codec->spdif_status_reset && (codec->spdif_ctls & AC_DIG1_ENABLE))
            snd_hda_codec_write(codec,
                        Nv_Master_Convert_nid,
                        0,
                        AC_VERB_SET_DIGI_CONVERT_1,
                        codec->spdif_ctls & ~AC_DIG1_ENABLE & 0xff);

      /* set the stream id */
      snd_hda_codec_write(codec, Nv_Master_Convert_nid, 0,
                  AC_VERB_SET_CHANNEL_STREAMID, (stream_tag << 4) | 0x0);

      /* set the stream format */
      snd_hda_codec_write(codec, Nv_Master_Convert_nid, 0,
                  AC_VERB_SET_STREAM_FORMAT, format);

      /* turn on again (if needed) */
      /* enable and set the channel status audio/data flag */
      if (codec->spdif_status_reset && (codec->spdif_ctls & AC_DIG1_ENABLE)) {
            snd_hda_codec_write(codec,
                        Nv_Master_Convert_nid,
                        0,
                        AC_VERB_SET_DIGI_CONVERT_1,
                        codec->spdif_ctls & 0xff);
            snd_hda_codec_write(codec,
                        Nv_Master_Convert_nid,
                        0,
                        AC_VERB_SET_DIGI_CONVERT_2, dataDCC2);
      }

      for (i = 0; i < 4; i++) {
            if (chs == 2)
                  channel_id = 0;
            else
                  channel_id = i * 2;

            /* turn off SPDIF once;
             *otherwise the IEC958 bits won't be updated
             */
            if (codec->spdif_status_reset &&
            (codec->spdif_ctls & AC_DIG1_ENABLE))
                  snd_hda_codec_write(codec,
                        nvhdmi_convert_nids[i],
                        0,
                        AC_VERB_SET_DIGI_CONVERT_1,
                        codec->spdif_ctls & ~AC_DIG1_ENABLE & 0xff);
            /* set the stream id */
            snd_hda_codec_write(codec,
                        nvhdmi_convert_nids[i],
                        0,
                        AC_VERB_SET_CHANNEL_STREAMID,
                        (stream_tag << 4) | channel_id);
            /* set the stream format */
            snd_hda_codec_write(codec,
                        nvhdmi_convert_nids[i],
                        0,
                        AC_VERB_SET_STREAM_FORMAT,
                        format);
            /* turn on again (if needed) */
            /* enable and set the channel status audio/data flag */
            if (codec->spdif_status_reset &&
            (codec->spdif_ctls & AC_DIG1_ENABLE)) {
                  snd_hda_codec_write(codec,
                              nvhdmi_convert_nids[i],
                              0,
                              AC_VERB_SET_DIGI_CONVERT_1,
                              codec->spdif_ctls & 0xff);
                  snd_hda_codec_write(codec,
                              nvhdmi_convert_nids[i],
                              0,
                              AC_VERB_SET_DIGI_CONVERT_2, dataDCC2);
            }
      }

      /* set the Audio Info Frame Checksum */
      snd_hda_codec_write(codec, 0x1, 0,
                  Nv_VERB_SET_Info_Frame_Checksum,
                  (0x71 - chan - chanmask));

      mutex_unlock(&codec->spdif_mutex);
      return 0;
}

static int nvhdmi_dig_playback_pcm_prepare_2ch(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_8ch = {
      .substreams = 1,
      .channels_min = 2,
      .channels_max = 8,
      .nid = Nv_Master_Convert_nid,
      .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_8ch,
            .prepare = nvhdmi_dig_playback_pcm_prepare_8ch
      },
};

static struct hda_pcm_stream nvhdmi_pcm_digital_playback_2ch = {
      .substreams = 1,
      .channels_min = 2,
      .channels_max = 2,
      .nid = Nv_Master_Convert_nid,
      .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_2ch,
            .prepare = nvhdmi_dig_playback_pcm_prepare_2ch
      },
};

static int nvhdmi_build_pcms_8ch(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->pcm_type = HDA_PCM_TYPE_HDMI;
      info->stream[SNDRV_PCM_STREAM_PLAYBACK]
                              = nvhdmi_pcm_digital_playback_8ch;

      return 0;
}

static int nvhdmi_build_pcms_2ch(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->pcm_type = HDA_PCM_TYPE_HDMI;
      info->stream[SNDRV_PCM_STREAM_PLAYBACK]
                              = nvhdmi_pcm_digital_playback_2ch;

      return 0;
}

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

static struct hda_codec_ops nvhdmi_patch_ops_8ch = {
      .build_controls = nvhdmi_build_controls,
      .build_pcms = nvhdmi_build_pcms_8ch,
      .init = nvhdmi_init,
      .free = nvhdmi_free,
};

static struct hda_codec_ops nvhdmi_patch_ops_2ch = {
      .build_controls = nvhdmi_build_controls,
      .build_pcms = nvhdmi_build_pcms_2ch,
      .init = nvhdmi_init,
      .free = nvhdmi_free,
};

static int patch_nvhdmi_8ch(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 = 8;
      spec->multiout.dig_out_nid = Nv_Master_Convert_nid;

      codec->patch_ops = nvhdmi_patch_ops_8ch;

      return 0;
}

static int patch_nvhdmi_2ch(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 = Nv_Master_Convert_nid;

      codec->patch_ops = nvhdmi_patch_ops_2ch;

      return 0;
}

/*
 * patch entries
 */
static struct hda_codec_preset snd_hda_preset_nvhdmi[] = {
      { .id = 0x10de0002, .name = "MCP78 HDMI", .patch = patch_nvhdmi_8ch },
      { .id = 0x10de0006, .name = "MCP78 HDMI", .patch = patch_nvhdmi_8ch },
      { .id = 0x10de0007, .name = "MCP7A HDMI", .patch = patch_nvhdmi_8ch },
      { .id = 0x10de0067, .name = "MCP67 HDMI", .patch = patch_nvhdmi_2ch },
      { .id = 0x10de8001, .name = "MCP73 HDMI", .patch = patch_nvhdmi_2ch },
      {} /* terminator */
};

MODULE_ALIAS("snd-hda-codec-id:10de0002");
MODULE_ALIAS("snd-hda-codec-id:10de0006");
MODULE_ALIAS("snd-hda-codec-id:10de0007");
MODULE_ALIAS("snd-hda-codec-id:10de0067");
MODULE_ALIAS("snd-hda-codec-id:10de8001");

MODULE_LICENSE("GPL");
MODULE_DESCRIPTION("Nvidia HDMI HD-audio codec");

static struct hda_codec_preset_list nvhdmi_list = {
      .preset = snd_hda_preset_nvhdmi,
      .owner = THIS_MODULE,
};

static int __init patch_nvhdmi_init(void)
{
      return snd_hda_add_codec_preset(&nvhdmi_list);
}

static void __exit patch_nvhdmi_exit(void)
{
      snd_hda_delete_codec_preset(&nvhdmi_list);
}

module_init(patch_nvhdmi_init)
module_exit(patch_nvhdmi_exit)

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