自学教程：C++ snd_soc_dapm_add_routes函数代码示例

static int max97236_add_widgets(struct snd_soc_codec *codec){#ifdef DAPM_ENABLE	struct snd_soc_dapm_context *dapm = &codec->dapm;#endif	snd_soc_add_codec_controls(codec, max97236_snd_controls,		ARRAY_SIZE(max97236_snd_controls));#ifdef DAPM_ENABLE	snd_soc_dapm_new_controls(dapm, max97236_dapm_widgets,		ARRAY_SIZE(max97236_dapm_widgets));	snd_soc_dapm_add_routes(dapm, max97236_dapm_routes,		ARRAY_SIZE(max97236_dapm_routes));#endif	return 0;}

static int nusmart_es8388_init(struct snd_soc_pcm_runtime *rtd){    struct snd_soc_codec *codec = rtd->codec;    struct snd_soc_dapm_context *dapm = &codec->dapm;    snd_soc_add_codec_controls(codec, nusmart_controls,            ARRAY_SIZE(nusmart_controls));    snd_soc_dapm_new_controls(dapm, es8388_dapm_widgets,            ARRAY_SIZE(es8388_dapm_widgets));    snd_soc_dapm_add_routes(dapm, audio_map, ARRAY_SIZE(audio_map));    snd_soc_dapm_enable_pin(dapm, "Ext Spk");    snd_soc_dapm_enable_pin(dapm, "Headphone Jack");    snd_soc_dapm_enable_pin(dapm, "Mic Jack");    snd_soc_dapm_enable_pin(dapm, "HeadSet Mic");    snd_soc_dapm_sync(dapm);    return 0;}

/** * simtec_tlv320aic23_init - initialise and add controls * @codec; The codec instance to attach to. * * Attach our controls and configure the necessary codec * mappings for our sound card instance.*/static int simtec_tlv320aic23_init(struct snd_soc_pcm_runtime *rtd){	struct snd_soc_codec *codec = rtd->codec;	snd_soc_dapm_new_controls(codec, dapm_widgets,				  ARRAY_SIZE(dapm_widgets));	snd_soc_dapm_add_routes(codec, base_map, ARRAY_SIZE(base_map));	snd_soc_dapm_enable_pin(codec, "Headphone Jack");	snd_soc_dapm_enable_pin(codec, "Line In");	snd_soc_dapm_enable_pin(codec, "Line Out");	snd_soc_dapm_enable_pin(codec, "Mic Jack");	simtec_audio_init(rtd);	snd_soc_dapm_sync(codec);	return 0;}

static int smdk6440_s5m8751_init(struct snd_soc_codec *codec){	int i;	/* Add smdk6440 specific widgets */	snd_soc_dapm_new_controls(codec, s5m8751_dapm_widgets,ARRAY_SIZE(s5m8751_dapm_widgets));	/* set up smdk6440 specific audio paths */	snd_soc_dapm_add_routes(codec, audio_map,ARRAY_SIZE(audio_map));	/* No jack detect - mark all jacks as enabled */	for (i = 0; i < ARRAY_SIZE(s5m8751_dapm_widgets); i++)		snd_soc_dapm_set_endpoint(codec,					  s5m8751_dapm_widgets[i].name, 1);	snd_soc_dapm_sync_endpoints(codec);	return 0;}

static int sdp4430_twl6040_init(struct snd_soc_pcm_runtime *rtd){	struct snd_soc_codec *codec = rtd->codec;	struct snd_soc_dapm_context *dapm = &codec->dapm;	int ret;	/* Add SDP4430 specific widgets */	ret = snd_soc_dapm_new_controls(dapm, sdp4430_twl6040_dapm_widgets,				ARRAY_SIZE(sdp4430_twl6040_dapm_widgets));	if (ret)		return ret;	/* Set up SDP4430 specific audio path audio_map */	snd_soc_dapm_add_routes(dapm, audio_map, ARRAY_SIZE(audio_map));	/* SDP4430 connected pins */	snd_soc_dapm_enable_pin(dapm, "Ext Mic");	snd_soc_dapm_enable_pin(dapm, "Ext Spk");	snd_soc_dapm_enable_pin(dapm, "AFML");	snd_soc_dapm_enable_pin(dapm, "AFMR");	snd_soc_dapm_enable_pin(dapm, "Headset Mic");	snd_soc_dapm_enable_pin(dapm, "Headset Stereophone");	ret = snd_soc_dapm_sync(dapm);	if (ret)		return ret;	/* Headset jack detection */	ret = snd_soc_jack_new(codec, "Headset Jack",				SND_JACK_HEADSET, &hs_jack);	if (ret)		return ret;	ret = snd_soc_jack_add_pins(&hs_jack, ARRAY_SIZE(hs_jack_pins),				hs_jack_pins);	if (machine_is_omap_4430sdp())		twl6040_hs_jack_detect(codec, &hs_jack, SND_JACK_HEADSET);	else		snd_soc_jack_report(&hs_jack, SND_JACK_HEADSET, SND_JACK_HEADSET);	return ret;}

static int ad1836_probe(struct platform_device *pdev){	struct snd_soc_device *socdev = platform_get_drvdata(pdev);	struct snd_soc_codec *codec;	int ret = 0;	if (ad1836_codec == NULL) {		dev_err(&pdev->dev, "Codec device not registered/n");		return -ENODEV;	}	socdev->card->codec = ad1836_codec;	codec = ad1836_codec;	/* register pcms */	ret = snd_soc_new_pcms(socdev, SNDRV_DEFAULT_IDX1, SNDRV_DEFAULT_STR1);	if (ret < 0) {		dev_err(codec->dev, "failed to create pcms: %d/n", ret);		goto pcm_err;	}	snd_soc_add_controls(codec, ad1836_snd_controls,			     ARRAY_SIZE(ad1836_snd_controls));	snd_soc_dapm_new_controls(codec, ad1836_dapm_widgets,				  ARRAY_SIZE(ad1836_dapm_widgets));	snd_soc_dapm_add_routes(codec, audio_paths, ARRAY_SIZE(audio_paths));	snd_soc_dapm_new_widgets(codec);	ret = snd_soc_init_card(socdev);	if (ret < 0) {		dev_err(codec->dev, "failed to register card: %d/n", ret);		goto card_err;	}	return ret;card_err:	snd_soc_free_pcms(socdev);	snd_soc_dapm_free(socdev);pcm_err:	return ret;}

static int imx_3stack_ak4647_init(struct snd_soc_codec *codec){	int i, ret;	for (i = 0; i < ARRAY_SIZE(ak4647_card_controls); i++) {		ret = snd_ctl_add(codec->card,				  snd_soc_cnew(&ak4647_card_controls[i],					       codec, NULL));		if (ret < 0)			return ret;	}	snd_soc_dapm_new_controls(codec, imx_3stack_dapm_widgets,				  ARRAY_SIZE(imx_3stack_dapm_widgets));	snd_soc_dapm_add_routes(codec, audio_map, ARRAY_SIZE(audio_map));	snd_soc_dapm_sync(codec);	return 0;}

static int neo1973_lm4857_init(struct snd_soc_dapm_context *dapm){	int ret;	ret = snd_soc_dapm_new_controls(dapm, neo1973_lm4857_dapm_widgets,			ARRAY_SIZE(neo1973_lm4857_dapm_widgets));	if (ret)		return ret;	ret = snd_soc_dapm_add_routes(dapm, neo1973_lm4857_routes,			ARRAY_SIZE(neo1973_lm4857_routes));	if (ret)		return ret;	snd_soc_dapm_ignore_suspend(dapm, "Stereo Out");	snd_soc_dapm_ignore_suspend(dapm, "Handset Spk");	snd_soc_dapm_ignore_suspend(dapm, "Headphone");	return 0;}

static int am3517evm_aic23_init(struct snd_soc_pcm_runtime *rtd){	struct snd_soc_codec *codec = rtd->codec;	/* Add am3517-evm specific widgets */	snd_soc_dapm_new_controls(codec, tlv320aic23_dapm_widgets,				  ARRAY_SIZE(tlv320aic23_dapm_widgets));	/* Set up davinci-evm specific audio path audio_map */	snd_soc_dapm_add_routes(codec, audio_map, ARRAY_SIZE(audio_map));	/* always connected */	snd_soc_dapm_enable_pin(codec, "Line Out");	snd_soc_dapm_enable_pin(codec, "Line In");	snd_soc_dapm_enable_pin(codec, "Mic In");	snd_soc_dapm_sync(codec);	return 0;}

static int mini6410_ac97_init(struct snd_soc_codec *codec) {	unsigned short val;	/* add board specific widgets */	snd_soc_dapm_new_controls(codec, mini6410_dapm_widgets,			ARRAY_SIZE(mini6410_dapm_widgets));	/* setup board specific audio path audio_map */	snd_soc_dapm_add_routes(codec, audio_map, ARRAY_SIZE(audio_map));	/* Prepare MIC input */	val = codec->read(codec, AC97_3D_CONTROL);	codec->write(codec, AC97_3D_CONTROL, val | 0xc000);	/* Static setup for now */	snd_soc_dapm_enable_pin(codec, "Mic (on-board)");	snd_soc_dapm_sync(codec);	return 0;}

/** * simtec_hermes_init - initialise and add controls * @codec; The codec instance to attach to. * * Attach our controls and configure the necessary codec * mappings for our sound card instance.*/static int simtec_hermes_init(struct snd_soc_pcm_runtime *rtd){	struct snd_soc_codec *codec = rtd->codec;	struct snd_soc_dapm_context *dapm = &codec->dapm;	snd_soc_dapm_new_controls(dapm, dapm_widgets,				  ARRAY_SIZE(dapm_widgets));	snd_soc_dapm_add_routes(dapm, base_map, ARRAY_SIZE(base_map));	snd_soc_dapm_enable_pin(dapm, "Headphone Jack");	snd_soc_dapm_enable_pin(dapm, "Line In");	snd_soc_dapm_enable_pin(dapm, "Line Out");	snd_soc_dapm_enable_pin(dapm, "Mic Jack");	simtec_audio_init(rtd);	snd_soc_dapm_sync(dapm);	return 0;}

static int jz4740_codec_dev_probe(struct snd_soc_codec *codec){	snd_soc_update_bits(codec, JZ4740_REG_CODEC_1,			JZ4740_CODEC_1_SW2_ENABLE, JZ4740_CODEC_1_SW2_ENABLE);	snd_soc_add_controls(codec, jz4740_codec_controls,		ARRAY_SIZE(jz4740_codec_controls));	snd_soc_dapm_new_controls(codec, jz4740_codec_dapm_widgets,		ARRAY_SIZE(jz4740_codec_dapm_widgets));	snd_soc_dapm_add_routes(codec, jz4740_codec_dapm_routes,		ARRAY_SIZE(jz4740_codec_dapm_routes));	snd_soc_dapm_new_widgets(codec);	jz4740_codec_set_bias_level(codec, SND_SOC_BIAS_STANDBY);	return 0;}

static int omap3pandora_in_init(struct snd_soc_codec *codec){	int ret;	/* Not comnnected */	snd_soc_dapm_nc_pin(codec, "HSMIC");	snd_soc_dapm_nc_pin(codec, "CARKITMIC");	snd_soc_dapm_nc_pin(codec, "DIGIMIC0");	snd_soc_dapm_nc_pin(codec, "DIGIMIC1");	ret = snd_soc_dapm_new_controls(codec, omap3pandora_in_dapm_widgets,				ARRAY_SIZE(omap3pandora_in_dapm_widgets));	if (ret < 0)		return ret;	snd_soc_dapm_add_routes(codec, omap3pandora_in_map,		ARRAY_SIZE(omap3pandora_in_map));	return snd_soc_dapm_sync(codec);}

static int osk_tlv320aic23_init(struct snd_soc_pcm_runtime *rtd){	struct snd_soc_codec *codec = rtd->codec;	struct snd_soc_dapm_context *dapm = &codec->dapm;	/* Add osk5912 specific widgets */	snd_soc_dapm_new_controls(dapm, tlv320aic23_dapm_widgets,				  ARRAY_SIZE(tlv320aic23_dapm_widgets));	/* Set up osk5912 specific audio path audio_map */	snd_soc_dapm_add_routes(dapm, audio_map, ARRAY_SIZE(audio_map));	snd_soc_dapm_enable_pin(dapm, "Headphone Jack");	snd_soc_dapm_enable_pin(dapm, "Line In");	snd_soc_dapm_enable_pin(dapm, "Mic Jack");	snd_soc_dapm_sync(dapm);	return 0;}

static int omap3pandora_in_init(struct snd_soc_pcm_runtime *rtd){	struct snd_soc_codec *codec = rtd->codec;	struct snd_soc_dapm_context *dapm = &codec->dapm;	int ret;	/* Not comnnected */	snd_soc_dapm_nc_pin(dapm, "HSMIC");	snd_soc_dapm_nc_pin(dapm, "CARKITMIC");	snd_soc_dapm_nc_pin(dapm, "DIGIMIC0");	snd_soc_dapm_nc_pin(dapm, "DIGIMIC1");	ret = snd_soc_dapm_new_controls(dapm, omap3pandora_in_dapm_widgets,				ARRAY_SIZE(omap3pandora_in_dapm_widgets));	if (ret < 0)		return ret;	return snd_soc_dapm_add_routes(dapm, omap3pandora_in_map,		ARRAY_SIZE(omap3pandora_in_map));}

static int cs42l51_probe(struct snd_soc_codec *codec){	struct cs42l51_private *cs42l51 = snd_soc_codec_get_drvdata(codec);	int ret, reg;	codec->control_data = cs42l51->control_data;	ret = cs42l51_fill_cache(codec);	if (ret < 0) {		dev_err(codec->dev, "failed to fill register cache/n");		return ret;	}	ret = snd_soc_codec_set_cache_io(codec, 8, 8, cs42l51->control_type);	if (ret < 0) {		dev_err(codec->dev, "Failed to set cache I/O: %d/n", ret);		return ret;	}	/*	 * DAC configuration	 * - Use signal processor	 * - auto mute	 * - vol changes immediate	 * - no de-emphasize	 */	reg = CS42L51_DAC_CTL_DATA_SEL(1)		| CS42L51_DAC_CTL_AMUTE | CS42L51_DAC_CTL_DACSZ(0);	ret = snd_soc_write(codec, CS42L51_DAC_CTL, reg);	if (ret < 0)		return ret;	snd_soc_add_controls(codec, cs42l51_snd_controls,		ARRAY_SIZE(cs42l51_snd_controls));	snd_soc_dapm_new_controls(codec, cs42l51_dapm_widgets,		ARRAY_SIZE(cs42l51_dapm_widgets));	snd_soc_dapm_add_routes(codec, cs42l51_routes,		ARRAY_SIZE(cs42l51_routes));	return 0;}

static int arizona_dai_set_sysclk(struct snd_soc_dai *dai,				  int clk_id, unsigned int freq, int dir){	struct snd_soc_codec *codec = dai->codec;	struct arizona_priv *priv = snd_soc_codec_get_drvdata(codec);	struct arizona_dai_priv *dai_priv = &priv->dai[dai->id - 1];	struct snd_soc_dapm_route routes[2];	switch (clk_id) {	case ARIZONA_CLK_SYSCLK:	case ARIZONA_CLK_ASYNCCLK:		break;	default:		return -EINVAL;	}	if (clk_id == dai_priv->clk)		return 0;	if (dai->active) {		dev_err(codec->dev, "Can't change clock on active DAI %d/n",			dai->id);		return -EBUSY;	}	memset(&routes, 0, sizeof(routes));	routes[0].sink = dai->driver->capture.stream_name;	routes[1].sink = dai->driver->playback.stream_name;	routes[0].source = arizona_dai_clk_str(dai_priv->clk);	routes[1].source = arizona_dai_clk_str(dai_priv->clk);	snd_soc_dapm_del_routes(&codec->dapm, routes, ARRAY_SIZE(routes));	routes[0].source = arizona_dai_clk_str(clk_id);	routes[1].source = arizona_dai_clk_str(clk_id);	snd_soc_dapm_add_routes(&codec->dapm, routes, ARRAY_SIZE(routes));	dai_priv->clk = clk_id;	return snd_soc_dapm_sync(&codec->dapm);}

static int ad1836_probe(struct snd_soc_codec *codec){	struct ad1836_priv *ad1836 = snd_soc_codec_get_drvdata(codec);	struct snd_soc_dapm_context *dapm = &codec->dapm;	int ret = 0;	codec->control_data = ad1836->control_data;	ret = snd_soc_codec_set_cache_io(codec, 4, 12, SND_SOC_SPI);	if (ret < 0) {		dev_err(codec->dev, "failed to set cache I/O: %d/n",				ret);		return ret;	}	/* default setting for ad1836 */	/* de-emphasis: 48kHz, power-on dac */	snd_soc_write(codec, AD1836_DAC_CTRL1, 0x300);	/* unmute dac channels */	snd_soc_write(codec, AD1836_DAC_CTRL2, 0x0);	/* high-pass filter enable, power-on adc */	snd_soc_write(codec, AD1836_ADC_CTRL1, 0x100);	/* unmute adc channles, adc aux mode */	snd_soc_write(codec, AD1836_ADC_CTRL2, 0x180);	/* left/right diff:PGA/MUX */	snd_soc_write(codec, AD1836_ADC_CTRL3, 0x3A);	/* volume */	snd_soc_write(codec, AD1836_DAC_L1_VOL, 0x3FF);	snd_soc_write(codec, AD1836_DAC_R1_VOL, 0x3FF);	snd_soc_write(codec, AD1836_DAC_L2_VOL, 0x3FF);	snd_soc_write(codec, AD1836_DAC_R2_VOL, 0x3FF);	snd_soc_write(codec, AD1836_DAC_L3_VOL, 0x3FF);	snd_soc_write(codec, AD1836_DAC_R3_VOL, 0x3FF);	snd_soc_add_controls(codec, ad1836_snd_controls,			     ARRAY_SIZE(ad1836_snd_controls));	snd_soc_dapm_new_controls(dapm, ad1836_dapm_widgets,				  ARRAY_SIZE(ad1836_dapm_widgets));	snd_soc_dapm_add_routes(dapm, audio_paths, ARRAY_SIZE(audio_paths));	return ret;}

static int mango210_wm8960_init_paifrx(struct snd_soc_codec *codec){	int ret;	/* Add mango210 specific Playback widgets */	snd_soc_dapm_new_controls(codec, wm8960_dapm_widgets_pbk,				  ARRAY_SIZE(wm8960_dapm_widgets_pbk));	/* add iDMA controls */	ret = snd_soc_add_controls(codec, &s5p_idma_control, 1);	if (ret < 0)		return ret;	/* Set up PAIFRX audio path */	snd_soc_dapm_add_routes(codec, audio_map_rx, ARRAY_SIZE(audio_map_rx));	/* signal a DAPM event */	snd_soc_dapm_sync(codec);	/* Set the Codec DAI configuration */	ret = snd_soc_dai_set_fmt(&wm8960_dai, SND_SOC_DAIFMT_I2S					 | SND_SOC_DAIFMT_NB_NF					 | SND_SOC_DAIFMT_CBS_CFS);	if (ret < 0)		return ret;	/* Set the AP DAI configuration */	ret = snd_soc_dai_set_fmt(&s3c64xx_i2s_dai[I2S_NUM], SND_SOC_DAIFMT_I2S					 | SND_SOC_DAIFMT_NB_NF					 | SND_SOC_DAIFMT_CBS_CFS);	if (ret < 0)		return ret;	/* Set WM8960 to drive MCLK from its MCLK-pin */	ret = snd_soc_dai_set_clkdiv(&wm8960_dai, WM8960_SYSCLKSEL,					WM8960_SYSCLK_MCLK);	if (ret < 0)		return ret;	return 0;}

static int qi_lb60_codec_init(struct snd_soc_pcm_runtime *rtd){    struct snd_soc_codec *codec = rtd->codec;    struct snd_soc_dai *cpu_dai = rtd->cpu_dai;    int ret;    snd_soc_dapm_nc_pin(codec, "LIN");    snd_soc_dapm_nc_pin(codec, "RIN");    ret = snd_soc_dai_set_fmt(cpu_dai, QI_LB60_DAIFMT);    if (ret < 0) {        dev_err(codec->dev, "Failed to set cpu dai format: %d/n", ret);        return ret;    }    snd_soc_dapm_new_controls(codec, qi_lb60_widgets, ARRAY_SIZE(qi_lb60_widgets));    snd_soc_dapm_add_routes(codec, qi_lb60_routes, ARRAY_SIZE(qi_lb60_routes));    snd_soc_dapm_sync(codec);    return 0;}

static int wm8350_add_widgets(struct snd_soc_codec *codec){	int ret;	ret = snd_soc_dapm_new_controls(codec,					wm8350_dapm_widgets,					ARRAY_SIZE(wm8350_dapm_widgets));	if (ret != 0) {		dev_err(codec->dev, "dapm control register failed/n");		return ret;	}	/* set up audio paths */	ret = snd_soc_dapm_add_routes(codec, audio_map, ARRAY_SIZE(audio_map));	if (ret != 0) {		dev_err(codec->dev, "DAPM route register failed/n");		return ret;	}	return 0;}

static int smdk6410_ac97_init(struct snd_soc_pcm_runtime *rtd) {	struct snd_soc_codec *codec = rtd->codec;    struct snd_soc_dapm_context *dapm = &codec->dapm;	unsigned short val;	/* add board specific widgets */	snd_soc_dapm_new_controls(dapm, ARRAY_AND_SIZE(smdk6410_dapm_widgets));	/* setup board specific audio path audio_map */	snd_soc_dapm_add_routes(dapm, ARRAY_AND_SIZE(audio_map));	/* Prepare MIC input */	val = codec->driver->read(codec, AC97_3D_CONTROL);	codec->driver->write(codec, AC97_3D_CONTROL, val | 0xc000);	/* Static setup for now */	snd_soc_dapm_enable_pin(dapm, "Mic (on-board)");	snd_soc_dapm_sync(dapm);	return 0;}

static int mango210_wm8960_init_paiftx(struct snd_soc_codec *codec){	int ret;	/* Add mango210 specific Capture widgets */	snd_soc_dapm_new_controls(codec, wm8960_dapm_widgets_cpt,				  ARRAY_SIZE(wm8960_dapm_widgets_cpt));	/* Set up PAIFTX audio path */	snd_soc_dapm_add_routes(codec, audio_map_tx, ARRAY_SIZE(audio_map_tx));	/* Enabling the microphone requires the fitting of a 0R	 * resistor to connect the line from the microphone jack.	 *///	snd_soc_dapm_disable_pin(codec, "MicIn");	/* signal a DAPM event */	snd_soc_dapm_sync(codec);	/* Set the Codec DAI configuration */	ret = snd_soc_dai_set_fmt(&wm8960_dai, SND_SOC_DAIFMT_I2S					 | SND_SOC_DAIFMT_NB_NF					 | SND_SOC_DAIFMT_CBS_CFS);	if (ret < 0)		return ret;	/* Set the AP DAI configuration */	ret = snd_soc_dai_set_fmt(&s3c64xx_i2s_dai[I2S_NUM], SND_SOC_DAIFMT_I2S					 | SND_SOC_DAIFMT_NB_NF					 | SND_SOC_DAIFMT_CBS_CFS);	if (ret < 0)		return ret;	/* Set WM8960 to drive MCLK from its MCLK-pin */	ret = snd_soc_dai_set_clkdiv(&wm8960_dai, WM8960_SYSCLKSEL,					WM8960_SYSCLK_MCLK);	if (ret < 0)		return ret;	return 0;}