diff options
Diffstat (limited to 'sound/soc/samsung/s3c24xx_uda134x.c')
| -rw-r--r-- | sound/soc/samsung/s3c24xx_uda134x.c | 79 |
1 files changed, 43 insertions, 36 deletions
diff --git a/sound/soc/samsung/s3c24xx_uda134x.c b/sound/soc/samsung/s3c24xx_uda134x.c index 7853fbe6ccc9..81a78940967c 100644 --- a/sound/soc/samsung/s3c24xx_uda134x.c +++ b/sound/soc/samsung/s3c24xx_uda134x.c @@ -19,9 +19,15 @@ #include <sound/s3c24xx_uda134x.h> #include "regs-iis.h" - #include "s3c24xx-i2s.h" +struct s3c24xx_uda134x { + struct clk *xtal; + struct clk *pclk; + struct mutex clk_lock; + int clk_users; +}; + /* #define ENFORCE_RATES 1 */ /* Unfortunately the S3C24XX in master mode has a limited capacity of @@ -36,15 +42,6 @@ possible an error will be returned. */ -static struct clk *xtal; -static struct clk *pclk; -/* this is need because we don't have a place where to keep the - * pointers to the clocks in each substream. We get the clocks only - * when we are actually using them so we don't block stuff like - * frequency change or oscillator power-off */ -static int clk_users; -static DEFINE_MUTEX(clk_lock); - static unsigned int rates[33 * 2]; #ifdef ENFORCE_RATES static struct snd_pcm_hw_constraint_list hw_constraints_rates = { @@ -57,26 +54,24 @@ static struct snd_pcm_hw_constraint_list hw_constraints_rates = { static int s3c24xx_uda134x_startup(struct snd_pcm_substream *substream) { struct snd_soc_pcm_runtime *rtd = substream->private_data; + struct s3c24xx_uda134x *priv = snd_soc_card_get_drvdata(rtd->card); struct snd_soc_dai *cpu_dai = rtd->cpu_dai; -#ifdef ENFORCE_RATES - struct snd_pcm_runtime *runtime = substream->runtime; -#endif int ret = 0; - mutex_lock(&clk_lock); + mutex_lock(&priv->clk_lock); - if (clk_users == 0) { - xtal = clk_get(rtd->dev, "xtal"); - if (IS_ERR(xtal)) { + if (priv->clk_users == 0) { + priv->xtal = clk_get(rtd->dev, "xtal"); + if (IS_ERR(priv->xtal)) { dev_err(rtd->dev, "%s cannot get xtal\n", __func__); - ret = PTR_ERR(xtal); + ret = PTR_ERR(priv->xtal); } else { - pclk = clk_get(cpu_dai->dev, "iis"); - if (IS_ERR(pclk)) { + priv->pclk = clk_get(cpu_dai->dev, "iis"); + if (IS_ERR(priv->pclk)) { dev_err(rtd->dev, "%s cannot get pclk\n", __func__); - clk_put(xtal); - ret = PTR_ERR(pclk); + clk_put(priv->xtal); + ret = PTR_ERR(priv->pclk); } } if (!ret) { @@ -85,18 +80,19 @@ static int s3c24xx_uda134x_startup(struct snd_pcm_substream *substream) for (i = 0; i < 2; i++) { int fs = i ? 256 : 384; - rates[i*33] = clk_get_rate(xtal) / fs; + rates[i*33] = clk_get_rate(priv->xtal) / fs; for (j = 1; j < 33; j++) - rates[i*33 + j] = clk_get_rate(pclk) / + rates[i*33 + j] = clk_get_rate(priv->pclk) / (j * fs); } } } - clk_users += 1; - mutex_unlock(&clk_lock); + priv->clk_users += 1; + mutex_unlock(&priv->clk_lock); + if (!ret) { #ifdef ENFORCE_RATES - ret = snd_pcm_hw_constraint_list(runtime, 0, + ret = snd_pcm_hw_constraint_list(substream->runtime, 0, SNDRV_PCM_HW_PARAM_RATE, &hw_constraints_rates); if (ret < 0) @@ -109,15 +105,18 @@ static int s3c24xx_uda134x_startup(struct snd_pcm_substream *substream) static void s3c24xx_uda134x_shutdown(struct snd_pcm_substream *substream) { - mutex_lock(&clk_lock); - clk_users -= 1; - if (clk_users == 0) { - clk_put(xtal); - xtal = NULL; - clk_put(pclk); - pclk = NULL; + struct snd_soc_pcm_runtime *rtd = substream->private_data; + struct s3c24xx_uda134x *priv = snd_soc_card_get_drvdata(rtd->card); + + mutex_lock(&priv->clk_lock); + priv->clk_users -= 1; + if (priv->clk_users == 0) { + clk_put(priv->xtal); + priv->xtal = NULL; + clk_put(priv->pclk); + priv->pclk = NULL; } - mutex_unlock(&clk_lock); + mutex_unlock(&priv->clk_lock); } static int s3c24xx_uda134x_hw_params(struct snd_pcm_substream *substream, @@ -228,10 +227,18 @@ static struct snd_soc_card snd_soc_s3c24xx_uda134x = { static int s3c24xx_uda134x_probe(struct platform_device *pdev) { struct snd_soc_card *card = &snd_soc_s3c24xx_uda134x; + struct s3c24xx_uda134x *priv; int ret; - platform_set_drvdata(pdev, card); + priv = devm_kzalloc(&pdev->dev, sizeof(*priv), GFP_KERNEL); + if (!priv) + return -ENOMEM; + + mutex_init(&priv->clk_lock); + card->dev = &pdev->dev; + platform_set_drvdata(pdev, card); + snd_soc_card_set_drvdata(card, priv); ret = devm_snd_soc_register_card(&pdev->dev, card); if (ret) |