diff options
Diffstat (limited to 'sound/soc/pxa')
| -rw-r--r-- | sound/soc/pxa/zylonite.c | 101 |
1 files changed, 84 insertions, 17 deletions
diff --git a/sound/soc/pxa/zylonite.c b/sound/soc/pxa/zylonite.c index f8e9ecd589d..8541b679f6e 100644 --- a/sound/soc/pxa/zylonite.c +++ b/sound/soc/pxa/zylonite.c @@ -14,6 +14,7 @@ #include <linux/module.h> #include <linux/moduleparam.h> #include <linux/device.h> +#include <linux/clk.h> #include <linux/i2c.h> #include <sound/core.h> #include <sound/pcm.h> @@ -26,6 +27,17 @@ #include "pxa2xx-ac97.h" #include "pxa-ssp.h" +/* + * There is a physical switch SW15 on the board which changes the MCLK + * for the WM9713 between the standard AC97 master clock and the + * output of the CLK_POUT signal from the PXA. + */ +static int clk_pout; +module_param(clk_pout, int, 0); +MODULE_PARM_DESC(clk_pout, "Use CLK_POUT as WM9713 MCLK (SW15 on board)."); + +static struct clk *pout; + static struct snd_soc_card zylonite; static const struct snd_soc_dapm_widget zylonite_dapm_widgets[] = { @@ -61,10 +73,8 @@ static const struct snd_soc_dapm_route audio_map[] = { static int zylonite_wm9713_init(struct snd_soc_codec *codec) { - /* Currently we only support use of the AC97 clock here. If - * CLK_POUT is selected by SW15 then the clock API will need - * to be used to request and enable it here. - */ + if (clk_pout) + snd_soc_dai_set_pll(&codec->dai[0], 0, clk_get_rate(pout), 0); snd_soc_dapm_new_controls(codec, zylonite_dapm_widgets, ARRAY_SIZE(zylonite_dapm_widgets)); @@ -85,7 +95,6 @@ static int zylonite_voice_hw_params(struct snd_pcm_substream *substream, struct snd_soc_pcm_runtime *rtd = substream->private_data; struct snd_soc_dai *codec_dai = rtd->dai->codec_dai; struct snd_soc_dai *cpu_dai = rtd->dai->cpu_dai; - unsigned int pll_out = 0; unsigned int acds = 0; unsigned int wm9713_div = 0; int ret = 0; @@ -93,16 +102,13 @@ static int zylonite_voice_hw_params(struct snd_pcm_substream *substream, switch (params_rate(params)) { case 8000: wm9713_div = 12; - pll_out = 2048000; break; case 16000: wm9713_div = 6; - pll_out = 4096000; break; case 48000: default: wm9713_div = 2; - pll_out = 12288000; acds = 1; break; } @@ -123,10 +129,6 @@ static int zylonite_voice_hw_params(struct snd_pcm_substream *substream, if (ret < 0) return ret; - ret = snd_soc_dai_set_pll(cpu_dai, 0, 0, pll_out); - if (ret < 0) - return ret; - ret = snd_soc_dai_set_clkdiv(cpu_dai, PXA_SSP_AUDIO_DIV_ACDS, acds); if (ret < 0) return ret; @@ -135,11 +137,12 @@ static int zylonite_voice_hw_params(struct snd_pcm_substream *substream, if (ret < 0) return ret; - /* Note that if the PLL is in use the WM9713_PCMCLK_PLL_DIV needs - * to be set instead. - */ - ret = snd_soc_dai_set_clkdiv(codec_dai, WM9713_PCMCLK_DIV, - WM9713_PCMDIV(wm9713_div)); + if (clk_pout) + ret = snd_soc_dai_set_clkdiv(codec_dai, WM9713_PCMCLK_PLL_DIV, + WM9713_PCMDIV(wm9713_div)); + else + ret = snd_soc_dai_set_clkdiv(codec_dai, WM9713_PCMCLK_DIV, + WM9713_PCMDIV(wm9713_div)); if (ret < 0) return ret; @@ -173,8 +176,72 @@ static struct snd_soc_dai_link zylonite_dai[] = { }, }; +static int zylonite_probe(struct platform_device *pdev) +{ + int ret; + + if (clk_pout) { + pout = clk_get(NULL, "CLK_POUT"); + if (IS_ERR(pout)) { + dev_err(&pdev->dev, "Unable to obtain CLK_POUT: %ld\n", + PTR_ERR(pout)); + return PTR_ERR(pout); + } + + ret = clk_enable(pout); + if (ret != 0) { + dev_err(&pdev->dev, "Unable to enable CLK_POUT: %d\n", + ret); + clk_put(pout); + return ret; + } + + dev_dbg(&pdev->dev, "MCLK enabled at %luHz\n", + clk_get_rate(pout)); + } + + return 0; +} + +static int zylonite_remove(struct platform_device *pdev) +{ + if (clk_pout) { + clk_disable(pout); + clk_put(pout); + } + + return 0; +} + +static int zylonite_suspend_post(struct platform_device *pdev, + pm_message_t state) +{ + if (clk_pout) + clk_disable(pout); + + return 0; +} + +static int zylonite_resume_pre(struct platform_device *pdev) +{ + int ret = 0; + + if (clk_pout) { + ret = clk_enable(pout); + if (ret != 0) + dev_err(&pdev->dev, "Unable to enable CLK_POUT: %d\n", + ret); + } + + return ret; +} + static struct snd_soc_card zylonite = { .name = "Zylonite", + .probe = &zylonite_probe, + .remove = &zylonite_remove, + .suspend_post = &zylonite_suspend_post, + .resume_pre = &zylonite_resume_pre, .platform = &pxa2xx_soc_platform, .dai_link = zylonite_dai, .num_links = ARRAY_SIZE(zylonite_dai), |