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-rw-r--r--sound/soc/pxa/zylonite.c275
1 files changed, 275 insertions, 0 deletions
diff --git a/sound/soc/pxa/zylonite.c b/sound/soc/pxa/zylonite.c
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+++ b/sound/soc/pxa/zylonite.c
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+/*
+ * zylonite.c -- SoC audio for Zylonite
+ *
+ * Copyright 2008 Wolfson Microelectronics PLC.
+ * Author: Mark Brown <broonie@opensource.wolfsonmicro.com>
+ *
+ * This program is free software; you can redistribute it and/or
+ * modify it under the terms of the GNU General Public License as
+ * published by the Free Software Foundation; either version 2 of the
+ * License, or (at your option) any later version.
+ *
+ */
+
+#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>
+#include <sound/pcm_params.h>
+#include <sound/soc.h>
+
+#include "../codecs/wm9713.h"
+#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[] = {
+ SND_SOC_DAPM_HP("Headphone", NULL),
+ SND_SOC_DAPM_MIC("Headset Microphone", NULL),
+ SND_SOC_DAPM_MIC("Handset Microphone", NULL),
+ SND_SOC_DAPM_SPK("Multiactor", NULL),
+ SND_SOC_DAPM_SPK("Headset Earpiece", NULL),
+};
+
+/* Currently supported audio map */
+static const struct snd_soc_dapm_route audio_map[] = {
+
+ /* Headphone output connected to HPL/HPR */
+ { "Headphone", NULL, "HPL" },
+ { "Headphone", NULL, "HPR" },
+
+ /* On-board earpiece */
+ { "Headset Earpiece", NULL, "OUT3" },
+
+ /* Headphone mic */
+ { "MIC2A", NULL, "Mic Bias" },
+ { "Mic Bias", NULL, "Headset Microphone" },
+
+ /* On-board mic */
+ { "MIC1", NULL, "Mic Bias" },
+ { "Mic Bias", NULL, "Handset Microphone" },
+
+ /* Multiactor differentially connected over SPKL/SPKR */
+ { "Multiactor", NULL, "SPKL" },
+ { "Multiactor", NULL, "SPKR" },
+};
+
+static int zylonite_wm9713_init(struct snd_soc_pcm_runtime *rtd)
+{
+ if (clk_pout)
+ snd_soc_dai_set_pll(rtd->codec_dai, 0, 0,
+ clk_get_rate(pout), 0);
+
+ return 0;
+}
+
+static int zylonite_voice_hw_params(struct snd_pcm_substream *substream,
+ struct snd_pcm_hw_params *params)
+{
+ struct snd_soc_pcm_runtime *rtd = substream->private_data;
+ struct snd_soc_dai *codec_dai = rtd->codec_dai;
+ struct snd_soc_dai *cpu_dai = rtd->cpu_dai;
+ unsigned int pll_out = 0;
+ unsigned int wm9713_div = 0;
+ int ret = 0;
+ int rate = params_rate(params);
+ int width = snd_pcm_format_physical_width(params_format(params));
+
+ /* Only support ratios that we can generate neatly from the AC97
+ * based master clock - in particular, this excludes 44.1kHz.
+ * In most applications the voice DAC will be used for telephony
+ * data so multiples of 8kHz will be the common case.
+ */
+ switch (rate) {
+ case 8000:
+ wm9713_div = 12;
+ break;
+ case 16000:
+ wm9713_div = 6;
+ break;
+ case 48000:
+ wm9713_div = 2;
+ break;
+ default:
+ /* Don't support OSS emulation */
+ return -EINVAL;
+ }
+
+ /* Add 1 to the width for the leading clock cycle */
+ pll_out = rate * (width + 1) * 8;
+
+ ret = snd_soc_dai_set_sysclk(cpu_dai, PXA_SSP_CLK_AUDIO, 0, 1);
+ if (ret < 0)
+ return ret;
+
+ ret = snd_soc_dai_set_pll(cpu_dai, 0, 0, 0, pll_out);
+ if (ret < 0)
+ return ret;
+
+ 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;
+
+ return 0;
+}
+
+static struct snd_soc_ops zylonite_voice_ops = {
+ .hw_params = zylonite_voice_hw_params,
+};
+
+static struct snd_soc_dai_link zylonite_dai[] = {
+{
+ .name = "AC97",
+ .stream_name = "AC97 HiFi",
+ .codec_name = "wm9713-codec",
+ .platform_name = "pxa-pcm-audio",
+ .cpu_dai_name = "pxa2xx-ac97",
+ .codec_dai_name = "wm9713-hifi",
+ .init = zylonite_wm9713_init,
+},
+{
+ .name = "AC97 Aux",
+ .stream_name = "AC97 Aux",
+ .codec_name = "wm9713-codec",
+ .platform_name = "pxa-pcm-audio",
+ .cpu_dai_name = "pxa2xx-ac97-aux",
+ .codec_dai_name = "wm9713-aux",
+},
+{
+ .name = "WM9713 Voice",
+ .stream_name = "WM9713 Voice",
+ .codec_name = "wm9713-codec",
+ .platform_name = "pxa-pcm-audio",
+ .cpu_dai_name = "pxa-ssp-dai.2",
+ .codec_dai_name = "wm9713-voice",
+ .dai_fmt = SND_SOC_DAIFMT_I2S | SND_SOC_DAIFMT_NB_NF |
+ SND_SOC_DAIFMT_CBS_CFS,
+ .ops = &zylonite_voice_ops,
+},
+};
+
+static int zylonite_probe(struct snd_soc_card *card)
+{
+ int ret;
+
+ if (clk_pout) {
+ pout = clk_get(NULL, "CLK_POUT");
+ if (IS_ERR(pout)) {
+ dev_err(card->dev, "Unable to obtain CLK_POUT: %ld\n",
+ PTR_ERR(pout));
+ return PTR_ERR(pout);
+ }
+
+ ret = clk_enable(pout);
+ if (ret != 0) {
+ dev_err(card->dev, "Unable to enable CLK_POUT: %d\n",
+ ret);
+ clk_put(pout);
+ return ret;
+ }
+
+ dev_dbg(card->dev, "MCLK enabled at %luHz\n",
+ clk_get_rate(pout));
+ }
+
+ return 0;
+}
+
+static int zylonite_remove(struct snd_soc_card *card)
+{
+ if (clk_pout) {
+ clk_disable(pout);
+ clk_put(pout);
+ }
+
+ return 0;
+}
+
+static int zylonite_suspend_post(struct snd_soc_card *card)
+{
+ if (clk_pout)
+ clk_disable(pout);
+
+ return 0;
+}
+
+static int zylonite_resume_pre(struct snd_soc_card *card)
+{
+ int ret = 0;
+
+ if (clk_pout) {
+ ret = clk_enable(pout);
+ if (ret != 0)
+ dev_err(card->dev, "Unable to enable CLK_POUT: %d\n",
+ ret);
+ }
+
+ return ret;
+}
+
+static struct snd_soc_card zylonite = {
+ .name = "Zylonite",
+ .owner = THIS_MODULE,
+ .probe = &zylonite_probe,
+ .remove = &zylonite_remove,
+ .suspend_post = &zylonite_suspend_post,
+ .resume_pre = &zylonite_resume_pre,
+ .dai_link = zylonite_dai,
+ .num_links = ARRAY_SIZE(zylonite_dai),
+
+ .dapm_widgets = zylonite_dapm_widgets,
+ .num_dapm_widgets = ARRAY_SIZE(zylonite_dapm_widgets),
+ .dapm_routes = audio_map,
+ .num_dapm_routes = ARRAY_SIZE(audio_map),
+};
+
+static struct platform_device *zylonite_snd_ac97_device;
+
+static int __init zylonite_init(void)
+{
+ int ret;
+
+ zylonite_snd_ac97_device = platform_device_alloc("soc-audio", -1);
+ if (!zylonite_snd_ac97_device)
+ return -ENOMEM;
+
+ platform_set_drvdata(zylonite_snd_ac97_device, &zylonite);
+
+ ret = platform_device_add(zylonite_snd_ac97_device);
+ if (ret != 0)
+ platform_device_put(zylonite_snd_ac97_device);
+
+ return ret;
+}
+
+static void __exit zylonite_exit(void)
+{
+ platform_device_unregister(zylonite_snd_ac97_device);
+}
+
+module_init(zylonite_init);
+module_exit(zylonite_exit);
+
+MODULE_AUTHOR("Mark Brown <broonie@opensource.wolfsonmicro.com>");
+MODULE_DESCRIPTION("ALSA SoC WM9713 Zylonite");
+MODULE_LICENSE("GPL");
generated by cgit v1.2.3-54-g00ecf (git 2.45.2) at 2024-11-05 06:31:00 +0000