hda_codec.c

linux 内核源代码

		case 0x10:
			if (!(val & AC_SUPPCM_BITS_16))
				return 0;
			break;
		case 0x20:
			if (!(val & AC_SUPPCM_BITS_20))
				return 0;
			break;
		case 0x30:
			if (!(val & AC_SUPPCM_BITS_24))
				return 0;
			break;
		case 0x40:
			if (!(val & AC_SUPPCM_BITS_32))
				return 0;
			break;
		default:
			return 0;
		}
	} else {
		/* FIXME: check for float32 and AC3? */
	}

	return 1;
}

/*
 * PCM stuff
 */
static int hda_pcm_default_open_close(struct hda_pcm_stream *hinfo,
				      struct hda_codec *codec,
				      struct snd_pcm_substream *substream)
{
	return 0;
}

static int hda_pcm_default_prepare(struct hda_pcm_stream *hinfo,
				   struct hda_codec *codec,
				   unsigned int stream_tag,
				   unsigned int format,
				   struct snd_pcm_substream *substream)
{
	snd_hda_codec_setup_stream(codec, hinfo->nid, stream_tag, 0, format);
	return 0;
}

static int hda_pcm_default_cleanup(struct hda_pcm_stream *hinfo,
				   struct hda_codec *codec,
				   struct snd_pcm_substream *substream)
{
	snd_hda_codec_setup_stream(codec, hinfo->nid, 0, 0, 0);
	return 0;
}

static int __devinit set_pcm_default_values(struct hda_codec *codec,
					    struct hda_pcm_stream *info)
{
	/* query support PCM information from the given NID */
	if (info->nid && (!info->rates || !info->formats)) {
		snd_hda_query_supported_pcm(codec, info->nid,
				info->rates ? NULL : &info->rates,
				info->formats ? NULL : &info->formats,
				info->maxbps ? NULL : &info->maxbps);
	}
	if (info->ops.open == NULL)
		info->ops.open = hda_pcm_default_open_close;
	if (info->ops.close == NULL)
		info->ops.close = hda_pcm_default_open_close;
	if (info->ops.prepare == NULL) {
		snd_assert(info->nid, return -EINVAL);
		info->ops.prepare = hda_pcm_default_prepare;
	}
	if (info->ops.cleanup == NULL) {
		snd_assert(info->nid, return -EINVAL);
		info->ops.cleanup = hda_pcm_default_cleanup;
	}
	return 0;
}

/**
 * snd_hda_build_pcms - build PCM information
 * @bus: the BUS
 *
 * Create PCM information for each codec included in the bus.
 *
 * The build_pcms codec patch is requested to set up codec->num_pcms and
 * codec->pcm_info properly.  The array is referred by the top-level driver
 * to create its PCM instances.
 * The allocated codec->pcm_info should be released in codec->patch_ops.free
 * callback.
 *
 * At least, substreams, channels_min and channels_max must be filled for
 * each stream.  substreams = 0 indicates that the stream doesn't exist.
 * When rates and/or formats are zero, the supported values are queried
 * from the given nid.  The nid is used also by the default ops.prepare
 * and ops.cleanup callbacks.
 *
 * The driver needs to call ops.open in its open callback.  Similarly,
 * ops.close is supposed to be called in the close callback.
 * ops.prepare should be called in the prepare or hw_params callback
 * with the proper parameters for set up.
 * ops.cleanup should be called in hw_free for clean up of streams.
 *
 * This function returns 0 if successfull, or a negative error code.
 */
int __devinit snd_hda_build_pcms(struct hda_bus *bus)
{
	struct hda_codec *codec;

	list_for_each_entry(codec, &bus->codec_list, list) {
		unsigned int pcm, s;
		int err;
		if (!codec->patch_ops.build_pcms)
			continue;
		err = codec->patch_ops.build_pcms(codec);
		if (err < 0)
			return err;
		for (pcm = 0; pcm < codec->num_pcms; pcm++) {
			for (s = 0; s < 2; s++) {
				struct hda_pcm_stream *info;
				info = &codec->pcm_info[pcm].stream[s];
				if (!info->substreams)
					continue;
				err = set_pcm_default_values(codec, info);
				if (err < 0)
					return err;
			}
		}
	}
	return 0;
}

/**
 * snd_hda_check_board_config - compare the current codec with the config table
 * @codec: the HDA codec
 * @num_configs: number of config enums
 * @models: array of model name strings
 * @tbl: configuration table, terminated by null entries
 *
 * Compares the modelname or PCI subsystem id of the current codec with the
 * given configuration table.  If a matching entry is found, returns its
 * config value (supposed to be 0 or positive).
 *
 * If no entries are matching, the function returns a negative value.
 */
int snd_hda_check_board_config(struct hda_codec *codec,
			       int num_configs, const char **models,
			       const struct snd_pci_quirk *tbl)
{
	if (codec->bus->modelname && models) {
		int i;
		for (i = 0; i < num_configs; i++) {
			if (models[i] &&
			    !strcmp(codec->bus->modelname, models[i])) {
				snd_printd(KERN_INFO "hda_codec: model '%s' is "
					   "selected\n", models[i]);
				return i;
			}
		}
	}

	if (!codec->bus->pci || !tbl)
		return -1;

	tbl = snd_pci_quirk_lookup(codec->bus->pci, tbl);
	if (!tbl)
		return -1;
	if (tbl->value >= 0 && tbl->value < num_configs) {
#ifdef CONFIG_SND_DEBUG_DETECT
		char tmp[10];
		const char *model = NULL;
		if (models)
			model = models[tbl->value];
		if (!model) {
			sprintf(tmp, "#%d", tbl->value);
			model = tmp;
		}
		snd_printdd(KERN_INFO "hda_codec: model '%s' is selected "
			    "for config %x:%x (%s)\n",
			    model, tbl->subvendor, tbl->subdevice,
			    (tbl->name ? tbl->name : "Unknown device"));
#endif
		return tbl->value;
	}
	return -1;
}

/**
 * snd_hda_add_new_ctls - create controls from the array
 * @codec: the HDA codec
 * @knew: the array of struct snd_kcontrol_new
 *
 * This helper function creates and add new controls in the given array.
 * The array must be terminated with an empty entry as terminator.
 *
 * Returns 0 if successful, or a negative error code.
 */
int snd_hda_add_new_ctls(struct hda_codec *codec, struct snd_kcontrol_new *knew)
{
 	int err;

	for (; knew->name; knew++) {
		struct snd_kcontrol *kctl;
		kctl = snd_ctl_new1(knew, codec);
		if (!kctl)
			return -ENOMEM;
		err = snd_ctl_add(codec->bus->card, kctl);
		if (err < 0) {
			if (!codec->addr)
				return err;
			kctl = snd_ctl_new1(knew, codec);
			if (!kctl)
				return -ENOMEM;
			kctl->id.device = codec->addr;
			err = snd_ctl_add(codec->bus->card, kctl);
			if (err < 0)
				return err;
		}
	}
	return 0;
}

#ifdef CONFIG_SND_HDA_POWER_SAVE
static void hda_set_power_state(struct hda_codec *codec, hda_nid_t fg,
				unsigned int power_state);

static void hda_power_work(struct work_struct *work)
{
	struct hda_codec *codec =
		container_of(work, struct hda_codec, power_work.work);

	if (!codec->power_on || codec->power_count) {
		codec->power_transition = 0;
		return;
	}

	hda_call_codec_suspend(codec);
	if (codec->bus->ops.pm_notify)
		codec->bus->ops.pm_notify(codec);
}

static void hda_keep_power_on(struct hda_codec *codec)
{
	codec->power_count++;
	codec->power_on = 1;
}

void snd_hda_power_up(struct hda_codec *codec)
{
	codec->power_count++;
	if (codec->power_on || codec->power_transition)
		return;

	codec->power_on = 1;
	if (codec->bus->ops.pm_notify)
		codec->bus->ops.pm_notify(codec);
	hda_call_codec_resume(codec);
	cancel_delayed_work(&codec->power_work);
	codec->power_transition = 0;
}

void snd_hda_power_down(struct hda_codec *codec)
{
	--codec->power_count;
	if (!codec->power_on || codec->power_count || codec->power_transition)
		return;
	if (power_save) {
		codec->power_transition = 1; /* avoid reentrance */
		schedule_delayed_work(&codec->power_work,
				      msecs_to_jiffies(power_save * 1000));
	}
}

int snd_hda_check_amp_list_power(struct hda_codec *codec,
				 struct hda_loopback_check *check,
				 hda_nid_t nid)
{
	struct hda_amp_list *p;
	int ch, v;

	if (!check->amplist)
		return 0;
	for (p = check->amplist; p->nid; p++) {
		if (p->nid == nid)
			break;
	}
	if (!p->nid)
		return 0; /* nothing changed */

	for (p = check->amplist; p->nid; p++) {
		for (ch = 0; ch < 2; ch++) {
			v = snd_hda_codec_amp_read(codec, p->nid, ch, p->dir,
						   p->idx);
			if (!(v & HDA_AMP_MUTE) && v > 0) {
				if (!check->power_on) {
					check->power_on = 1;
					snd_hda_power_up(codec);
				}
				return 1;
			}
		}
	}
	if (check->power_on) {
		check->power_on = 0;
		snd_hda_power_down(codec);
	}
	return 0;
}
#endif

/*
 * Channel mode helper
 */
int snd_hda_ch_mode_info(struct hda_codec *codec,
			 struct snd_ctl_elem_info *uinfo,
			 const struct hda_channel_mode *chmode,
			 int num_chmodes)
{
	uinfo->type = SNDRV_CTL_ELEM_TYPE_ENUMERATED;
	uinfo->count = 1;
	uinfo->value.enumerated.items = num_chmodes;
	if (uinfo->value.enumerated.item >= num_chmodes)
		uinfo->value.enumerated.item = num_chmodes - 1;
	sprintf(uinfo->value.enumerated.name, "%dch",
		chmode[uinfo->value.enumerated.item].channels);
	return 0;
}

int snd_hda_ch_mode_get(struct hda_codec *codec,
			struct snd_ctl_elem_value *ucontrol,
			const struct hda_channel_mode *chmode,
			int num_chmodes,
			int max_channels)
{
	int i;

	for (i = 0; i < num_chmodes; i++) {
		if (max_channels == chmode[i].channels) {
			ucontrol->value.enumerated.item[0] = i;
			break;
		}
	}
	return 0;
}

int snd_hda_ch_mode_put(struct hda_codec *codec,
			struct snd_ctl_elem_value *ucontrol,
			const struct hda_channel_mode *chmode,
			int num_chmodes,
			int *max_channelsp)
{
	unsigned int mode;

	mode = ucontrol->value.enumerated.item[0];
	snd_assert(mode < num_chmodes, return -EINVAL);
	if (*max_channelsp == chmode[mode].channels)
		return 0;
	/* change the current channel setting */
	*max_channelsp = chmode[mode].channels;
	if (chmode[mode].sequence)
		snd_hda_sequence_write_cache(codec, chmode[mode].sequence);
	return 1;
}

/*
 * input MUX helper
 */
int snd_hda_input_mux_info(const struct hda_input_mux *imux,
			   struct snd_ctl_elem_info *uinfo)
{
	unsigned int index;

	uinfo->type = SNDRV_CTL_ELEM_TYPE_ENUMERATED;
	uinfo->count = 1;
	uinfo->value.enumerated.items = imux->num_items;
	if (!imux->num_items)
		return 0;
	index = uinfo->value.enumerated.item;
	if (index >= imux->num_items)
		index = imux->num_items - 1;
	strcpy(uinfo->value.enumerated.name, imux->items[index].label);
	return 0;
}

int snd_hda_input_mux_put(struct hda_codec *codec,
			  const struct hda_input_mux *imux,
			  struct snd_ctl_elem_value *ucontrol,
			  hda_nid_t nid,
			  unsigned int *cur_val)
{
	unsigned int idx;

	if (!imux->num_items)
		return 0;
	idx = ucontrol->value.enumerated.item[0];
	if (idx >= imux->num_items)
		idx = imux->num_items - 1;
	if (*cur_val == idx)
		return 0;
	snd_hda_codec_write_cache(codec, nid, 0, AC_VERB_SET_CONNECT_SEL,
				  imux->items[idx].index);
	*cur_val = idx;
	return 1;
}


/*
 * Multi-channel / digital-out PCM helper functions
 */

/* setup SPDIF output stream */
static void setup_dig_out_stream(struct hda_codec *codec, hda_nid_t nid,
				 unsigned int stream_tag, unsigned int format)
{
	/* turn off SPDIF once; otherwise the IEC958 bits won't be updated */
	if (codec->spdif_ctls & AC_DIG1_ENABLE)
		snd_hda_codec_write(codec, nid, 0, AC_VERB_SET_DIGI_CONVERT_1,
				    codec->spdif_ctls & ~AC_DIG1_ENABLE & 0xff);
	snd_hda_codec_setup_stream(codec, nid, stream_tag, 0, format);
	/* turn on again (if needed) */
	if (codec->spdif_ctls & AC_DIG1_ENABLE)
		snd_hda_codec_write(codec, nid, 0, AC_VERB_SET_DIGI_CONVERT_1,
				    codec->spdif_ctls & 0xff);
}

/*
 * open the digital out in the exclusive mode
 */
int snd_hda_multi_out_dig_open(struct hda_codec *codec,
			       struct hda_multi_out *mout)
{
	mutex_lock(&codec->spdif_mutex);
	if (mout->dig_out_used == HDA_DIG_ANALOG_DUP)
		/* already opened as analog dup; reset it once */
		snd_hda_codec_setup_stream(codec, mout->dig_out_nid, 0, 0, 0);
	mout->dig_out_used = HDA_DIG_EXCLUSIVE;
	mutex_unlock(&codec->spdif_mutex);
	return 0;
}

int snd_hda_multi_out_dig_prepare(struct hda_codec *codec,
				  struct hda_multi_out *mout,
				  unsigned int stream_tag,
				  unsigned int format,
				  struct snd_pcm_substream *substream)
{
	mutex_lock(&codec->spdif_mutex);
	setup_dig_out_stream(codec, mout->dig_out_nid, stream_tag, format);
	mutex_unlock(&codec->spdif_mutex);
	return 0;
}

/*
 * release the digital out
 */
int snd_hda_multi_out_dig_close(struct hda_codec *codec,
				struct hda_multi_out *mout)
{
	mutex_lock(&codec->spdif_mutex);
	mout->dig_out_used = 0;
	mutex_unlock(&codec->spdif_mutex);
	return 0;
}

/*
 * set up more restrictions for analog out
 */
int snd_hda_multi_out_analog_open(struct hda_codec *codec,
				  struct hda_multi_out *mout,
				  struct snd_pcm_substream *substream)
{
	substream->runtime->hw.channels_max = mout->max_channels;
	return snd_pcm_hw_constraint_step(substream->runtime, 0,
					  SNDRV_PCM_HW_PARAM_CHANNELS, 2);
}

/*
 * set up the i/o for analog out
 * when the digital out is available, copy the front out to digital out, too.
 */
int snd_hda_multi_out_analog_prepare(struct hda_codec *codec,
				     struct hda_multi_out *mout,
				     unsigned int stream_tag,
				     unsigned int format,
				     struct snd_pcm_substream *substream)
{
	hda_nid_t *nids = mout->dac_nids;
	int chs = substream->runtime->channels;
	int i;

	mutex_lock(&codec->spdif_mutex);
	if (mout->dig_out_nid && mout->dig_out_used != HDA_DIG_EXCLUSIVE) {
		if (chs == 2 &&
		    snd_hda_is_supported_format(codec, mout->dig_out_nid,
						format) &&
		    !(codec->spdif_status & IEC958