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Unverified Commit 37ac30a4 authored by Nicolin Chen's avatar Nicolin Chen Committed by Mark Brown
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ASoC: fsl_ssi: Setup AC97 in fsl_ssi_hw_init() 



AC97 configures most of registers earlier to start a communication
with CODECs in order to successfully initialize CODEC. Currently,
_fsl_ssi_set_dai_fmt() and fsl_ssi_setup_ac97() are called to get
all SSI registers properly set.

Since now the driver has a fsl_ssi_hw_init() to handle all register
initial settings, this patch moves those register settings of AC97
to the fsl_ssi_hw_init() as well.

Meanwhile it applies _fsl_ssi_set_dai_fmt() call to AC97 only since
other formats would be configured via normal set_dai_fmt() directly.

This patch also adds fsl_ssi_hw_clean() to cleanup control bits for
AC97 in the platform remote() function.

Signed-off-by: default avatarNicolin Chen <nicoleotsuka@gmail.com>
Tested-by: default avatarCaleb Crome <caleb@crome.org>
Tested-by: default avatarMaciej S. Szmigiero <mail@maciej.szmigiero.name>
Reviewed-by: default avatarMaciej S. Szmigiero <mail@maciej.szmigiero.name>
Signed-off-by: default avatarMark Brown <broonie@kernel.org>
parent a1d154ac

sound/soc/fsl/fsl_ssi.c

+27 −6
Original line number Diff line number Diff line
@@ -987,9 +987,6 @@ static int _fsl_ssi_set_dai_fmt(struct device *dev, 
	regmap_write(regs, REG_SSI_SRCR, srcr);

	regmap_write(regs, REG_SSI_SCR, scr);



	if ((fmt & SND_SOC_DAIFMT_FORMAT_MASK) == SND_SOC_DAIFMT_AC97)

		fsl_ssi_setup_ac97(ssi);



	return 0;

}
@@ -1255,9 +1252,33 @@ static int fsl_ssi_hw_init(struct fsl_ssi *ssi) 
		regmap_update_bits(ssi->regs, REG_SSI_SCR,

				   SSI_SCR_TCH_EN, SSI_SCR_TCH_EN);



	/* AC97 should start earlier to communicate with CODECs */

	if (fsl_ssi_is_ac97(ssi)) {

		_fsl_ssi_set_dai_fmt(ssi->dev, ssi, ssi->dai_fmt);

		fsl_ssi_setup_ac97(ssi);

	}



	return 0;

}



/**

 * Clear SSI registers

 */

static void fsl_ssi_hw_clean(struct fsl_ssi *ssi)

{

	/* Disable registers for AC97 */

	if (fsl_ssi_is_ac97(ssi)) {

		/* Disable TE and RE bits first */

		regmap_update_bits(ssi->regs, REG_SSI_SCR,

				   SSI_SCR_TE | SSI_SCR_RE, 0);

		/* Disable AC97 mode */

		regmap_write(ssi->regs, REG_SSI_SACNT, 0);

		/* Unset WAIT bits */

		regmap_write(ssi->regs, REG_SSI_SOR, 0);

		/* Disable SSI -- software reset */

		regmap_update_bits(ssi->regs, REG_SSI_SCR, SSI_SCR_SSIEN, 0);

	}

}

/**

 * Make every character in a string lower-case

 */
@@ -1540,9 +1561,6 @@ static int fsl_ssi_probe(struct platform_device *pdev) 
	}



done:

	if (ssi->dai_fmt)

		_fsl_ssi_set_dai_fmt(dev, ssi, ssi->dai_fmt);



	/* Initially configures SSI registers */

	fsl_ssi_hw_init(ssi);
@@ -1592,6 +1610,9 @@ static int fsl_ssi_remove(struct platform_device *pdev) 
	if (ssi->pdev)

		platform_device_unregister(ssi->pdev);



	/* Clean up SSI registers */

	fsl_ssi_hw_clean(ssi);



	if (ssi->soc->imx)

		fsl_ssi_imx_clean(pdev, ssi);