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Commit f20d77ce authored by Mark Brown's avatar Mark Brown
Browse files

ASoC: Refactor WM8958 DSP to support additional algorithms 



In preparation for the addition of additional WM8958 algorithms
reorganise the code to make it easier to add such support later.

Signed-off-by: default avatarMark Brown <broonie@opensource.wolfsonmicro.com>
Acked-by: default avatarLiam Girdwood <lrg@ti.com>
parent fbbf5920

sound/soc/codecs/wm8958-dsp2.c

+43 −53
Original line number Diff line number Diff line
@@ -189,7 +189,7 @@ static int wm8958_dsp2_fw(struct snd_soc_codec *codec, const char *name, 
	return ret;

}



static void wm8958_mbc_apply(struct snd_soc_codec *codec, int mbc, int start)

static void wm8958_dsp_start_mbc(struct snd_soc_codec *codec, int path)

{

	struct wm8994_priv *wm8994 = snd_soc_codec_get_drvdata(codec);

	struct wm8994_pdata *pdata = wm8994->pdata;
@@ -237,9 +237,9 @@ static void wm8958_dsp_apply(struct snd_soc_codec *codec, int path, int start) 
{

	struct wm8994_priv *wm8994 = snd_soc_codec_get_drvdata(codec);

	int pwr_reg = snd_soc_read(codec, WM8994_POWER_MANAGEMENT_5);

	int ena, reg, aif, i;

	int ena, reg, aif;



	switch (mbc) {

	switch (path) {

	case 0:

		pwr_reg &= (WM8994_AIF1DAC1L_ENA | WM8994_AIF1DAC1R_ENA);

		aif = 0;
@@ -257,64 +257,34 @@ static void wm8958_dsp_apply(struct snd_soc_codec *codec, int path, int start) 
		return;

	}



	/* We can only enable the MBC if the AIF is enabled and we

	 * want it to be enabled. */

	ena = pwr_reg && wm8994->mbc_ena[mbc];

	/* Do we have both an active AIF and an active algorithm? */

	ena = wm8994->mbc_ena[path];

	if (!pwr_reg)

		ena = 0;



	reg = snd_soc_read(codec, WM8958_DSP2_PROGRAM);



	dev_dbg(codec->dev, "MBC %d startup: %d, power: %x, DSP: %x\n",

		mbc, start, pwr_reg, reg);

	dev_dbg(codec->dev, "DSP path %d %d startup: %d, power: %x, DSP: %x\n",

		path, wm8994->dsp_active, start, pwr_reg, reg);



	if (start && ena) {

		/* If the DSP is already running then noop */

		if (reg & WM8958_DSP2_ENA)

			return;



		/* If neither AIFnCLK is not yet enabled postpone */

		/* If either AIFnCLK is not yet enabled postpone */

		if (!(snd_soc_read(codec, WM8994_AIF1_CLOCKING_1)

		      & WM8994_AIF1CLK_ENA_MASK) &&

		    !(snd_soc_read(codec, WM8994_AIF2_CLOCKING_1)

		      & WM8994_AIF2CLK_ENA_MASK))

			return;



		/* If we have MBC firmware download it */

		if (wm8994->mbc && wm8994->mbc_ena[mbc])

			wm8958_dsp2_fw(codec, "MBC", wm8994->mbc, false);



		/* Switch the clock over to the appropriate AIF */

		snd_soc_update_bits(codec, WM8994_CLOCKING_1,

				    WM8958_DSP2CLK_SRC | WM8958_DSP2CLK_ENA,

				    aif << WM8958_DSP2CLK_SRC_SHIFT |

				    WM8958_DSP2CLK_ENA);



		snd_soc_update_bits(codec, WM8958_DSP2_PROGRAM,

				    WM8958_DSP2_ENA, WM8958_DSP2_ENA);



		/* If we've got user supplied MBC settings use them */

		if (pdata && pdata->num_mbc_cfgs) {

			struct wm8958_mbc_cfg *cfg

				= &pdata->mbc_cfgs[wm8994->mbc_cfg];



			for (i = 0; i < ARRAY_SIZE(cfg->coeff_regs); i++)

				snd_soc_write(codec, i + WM8958_MBC_BAND_1_K_1,

					      cfg->coeff_regs[i]);



			for (i = 0; i < ARRAY_SIZE(cfg->cutoff_regs); i++)

				snd_soc_write(codec,

					      i + WM8958_MBC_BAND_2_LOWER_CUTOFF_C1_1,

					      cfg->cutoff_regs[i]);

		}



		/* Run the DSP */

		snd_soc_write(codec, WM8958_DSP2_EXECCONTROL,

			      WM8958_DSP2_RUNR);

		if (wm8994->mbc_ena[path])

			wm8958_dsp_start_mbc(codec, path);



		/* And we're off! */

		snd_soc_update_bits(codec, WM8958_DSP2_CONFIG,

				    WM8958_MBC_ENA | WM8958_MBC_SEL_MASK,

				    mbc << WM8958_MBC_SEL_SHIFT |

				    WM8958_MBC_ENA);

		dev_dbg(codec->dev, "DSP running\n");

	} else {

		/* If the DSP is already stopped then noop */

		if (!(reg & WM8958_DSP2_ENA))
@@ -322,10 +292,16 @@ static void wm8958_dsp_apply(struct snd_soc_codec *codec, int path, int start) 


		snd_soc_update_bits(codec, WM8958_DSP2_CONFIG,

				    WM8958_MBC_ENA, 0);	

		snd_soc_write(codec, WM8958_DSP2_EXECCONTROL,

			      WM8958_DSP2_STOP);

		snd_soc_update_bits(codec, WM8958_DSP2_PROGRAM,

				    WM8958_DSP2_ENA, 0);

		snd_soc_update_bits(codec, WM8994_CLOCKING_1,

				    WM8958_DSP2CLK_ENA, 0);



		wm8994->dsp_active = -1;



		dev_dbg(codec->dev, "DSP stopped\n");

	}

}
@@ -339,18 +315,33 @@ int wm8958_aif_ev(struct snd_soc_dapm_widget *w, 
	case SND_SOC_DAPM_POST_PMU:

	case SND_SOC_DAPM_PRE_PMU:

		for (i = 0; i < 3; i++)

			wm8958_mbc_apply(codec, i, 1);

			wm8958_dsp_apply(codec, i, 1);

		break;

	case SND_SOC_DAPM_POST_PMD:

	case SND_SOC_DAPM_PRE_PMD:

		for (i = 0; i < 3; i++)

			wm8958_mbc_apply(codec, i, 0);

			wm8958_dsp_apply(codec, i, 0);

		break;

	}



	return 0;

}



/* Check if DSP2 is in use on another AIF */

static int wm8958_dsp2_busy(struct wm8994_priv *wm8994, int aif)

{

	int i;



	for (i = 0; i < ARRAY_SIZE(wm8994->mbc_ena); i++) {

		if (i == aif)

			continue;

		if (wm8994->mbc_ena[i])

			return 1;

	}



	return 0;

}



static int wm8958_put_mbc_enum(struct snd_kcontrol *kcontrol,

			       struct snd_ctl_elem_value *ucontrol)

{
@@ -410,23 +401,20 @@ static int wm8958_mbc_put(struct snd_kcontrol *kcontrol, 
			  struct snd_ctl_elem_value *ucontrol)

{

	int mbc = kcontrol->private_value;

	int i;

	struct snd_soc_codec *codec = snd_kcontrol_chip(kcontrol);

	struct wm8994_priv *wm8994 = snd_soc_codec_get_drvdata(codec);



	if (ucontrol->value.integer.value[0] > 1)

		return -EINVAL;



	for (i = 0; i < ARRAY_SIZE(wm8994->mbc_ena); i++) {

		if (mbc != i && wm8994->mbc_ena[i]) {

			dev_dbg(codec->dev, "MBC %d active already\n", mbc);

	if (wm8958_dsp2_busy(wm8994, mbc)) {

		dev_dbg(codec->dev, "DSP2 active on %d already\n", mbc);

		return -EBUSY;

	}

	}



	wm8994->mbc_ena[mbc] = ucontrol->value.integer.value[0];



	wm8958_mbc_apply(codec, mbc, wm8994->mbc_ena[mbc]);

	wm8958_dsp_apply(codec, mbc, wm8994->mbc_ena[mbc]);



	return 0;

}
@@ -462,10 +450,12 @@ void wm8958_dsp2_init(struct snd_soc_codec *codec) 
	struct wm8994_pdata *pdata = wm8994->pdata;

	int ret, i;



	wm8994->dsp_active = -1;



	snd_soc_add_controls(codec, wm8958_mbc_snd_controls,

			     ARRAY_SIZE(wm8958_mbc_snd_controls));



	/* We don't require firmware and don't want to delay boot */

	/* We don't *require* firmware and don't want to delay boot */

	request_firmware_nowait(THIS_MODULE, FW_ACTION_HOTPLUG,

				"wm8958_mbc.wfw", codec->dev, GFP_KERNEL,

				codec, wm8958_mbc_loaded);

sound/soc/codecs/wm8994.h

+1 −0
Original line number Diff line number Diff line
@@ -116,6 +116,7 @@ struct wm8994_priv { 
	unsigned int aif1clk_disable:1;

	unsigned int aif2clk_disable:1;



	int dsp_active;

	const struct firmware *cur_fw;

	const struct firmware *mbc;

};