diff options
Diffstat (limited to 'sound/soc/kirkwood/kirkwood-i2s.c')
| -rw-r--r-- | sound/soc/kirkwood/kirkwood-i2s.c | 70 |
1 files changed, 62 insertions, 8 deletions
diff --git a/sound/soc/kirkwood/kirkwood-i2s.c b/sound/soc/kirkwood/kirkwood-i2s.c index 823ef1e71d1..d3629d5927e 100644 --- a/sound/soc/kirkwood/kirkwood-i2s.c +++ b/sound/soc/kirkwood/kirkwood-i2s.c @@ -99,6 +99,29 @@ static inline void kirkwood_set_dco(void __iomem *io, unsigned long rate) } while (value == 0); } +static void kirkwood_set_rate(struct snd_soc_dai *dai, + struct kirkwood_dma_data *priv, unsigned long rate) +{ + uint32_t clks_ctrl; + + if (rate == 44100 || rate == 48000 || rate == 96000) { + /* use internal dco for supported rates */ + dev_dbg(dai->dev, "%s: dco set rate = %lu\n", + __func__, rate); + kirkwood_set_dco(priv->io, rate); + + clks_ctrl = KIRKWOOD_MCLK_SOURCE_DCO; + } else if (!IS_ERR(priv->extclk)) { + /* use optional external clk for other rates */ + dev_dbg(dai->dev, "%s: extclk set rate = %lu -> %lu\n", + __func__, rate, 256 * rate); + clk_set_rate(priv->extclk, 256 * rate); + + clks_ctrl = KIRKWOOD_MCLK_SOURCE_EXTCLK; + } + writel(clks_ctrl, priv->io + KIRKWOOD_CLOCKS_CTRL); +} + static int kirkwood_i2s_startup(struct snd_pcm_substream *substream, struct snd_soc_dai *dai) { @@ -123,8 +146,7 @@ static int kirkwood_i2s_hw_params(struct snd_pcm_substream *substream, i2s_reg = KIRKWOOD_I2S_RECCTL; } - /* set dco conf */ - kirkwood_set_dco(priv->io, params_rate(params)); + kirkwood_set_rate(dai, priv, params_rate(params)); i2s_value = readl(priv->io+i2s_reg); i2s_value &= ~KIRKWOOD_I2S_CTL_SIZE_MASK; @@ -396,21 +418,45 @@ static struct snd_soc_dai_driver kirkwood_i2s_dai = { .channels_min = 1, .channels_max = 2, .rates = KIRKWOOD_I2S_RATES, - .formats = KIRKWOOD_I2S_FORMATS,}, + .formats = KIRKWOOD_I2S_FORMATS, + }, .capture = { .channels_min = 1, .channels_max = 2, .rates = KIRKWOOD_I2S_RATES, - .formats = KIRKWOOD_I2S_FORMATS,}, + .formats = KIRKWOOD_I2S_FORMATS, + }, + .ops = &kirkwood_i2s_dai_ops, +}; + +static struct snd_soc_dai_driver kirkwood_i2s_dai_extclk = { + .probe = kirkwood_i2s_probe, + .remove = kirkwood_i2s_remove, + .playback = { + .channels_min = 1, + .channels_max = 2, + .rates = SNDRV_PCM_RATE_8000_192000 | + SNDRV_PCM_RATE_CONTINUOUS | + SNDRV_PCM_RATE_KNOT, + .formats = KIRKWOOD_I2S_FORMATS, + }, + .capture = { + .channels_min = 1, + .channels_max = 2, + .rates = SNDRV_PCM_RATE_8000_192000 | + SNDRV_PCM_RATE_CONTINUOUS | + SNDRV_PCM_RATE_KNOT, + .formats = KIRKWOOD_I2S_FORMATS, + }, .ops = &kirkwood_i2s_dai_ops, }; static __devinit int kirkwood_i2s_dev_probe(struct platform_device *pdev) { - struct resource *mem; - struct kirkwood_asoc_platform_data *data = - pdev->dev.platform_data; + struct kirkwood_asoc_platform_data *data = pdev->dev.platform_data; + struct snd_soc_dai_driver *soc_dai = &kirkwood_i2s_dai; struct kirkwood_dma_data *priv; + struct resource *mem; int err; priv = devm_kzalloc(&pdev->dev, sizeof(*priv), GFP_KERNEL); @@ -480,11 +526,15 @@ static __devinit int kirkwood_i2s_dev_probe(struct platform_device *pdev) priv->ctl_rec |= KIRKWOOD_RECCTL_BURST_128; } - err = snd_soc_register_dai(&pdev->dev, &kirkwood_i2s_dai); + err = snd_soc_register_dai(&pdev->dev, soc_dai); if (!err) return 0; dev_err(&pdev->dev, "snd_soc_register_dai failed\n"); + if (!IS_ERR(priv->extclk)) { + clk_disable_unprepare(priv->extclk); + clk_put(priv->extclk); + } clk_disable_unprepare(priv->clk); return err; @@ -496,6 +546,10 @@ static __devexit int kirkwood_i2s_dev_remove(struct platform_device *pdev) snd_soc_unregister_dai(&pdev->dev); + if (!IS_ERR(priv->extclk)) { + clk_disable_unprepare(priv->extclk); + clk_put(priv->extclk); + } clk_disable_unprepare(priv->clk); return 0; |