Initial import

1 files changed, 328 insertions, 0 deletions

diff --git a/sound/soc/samsung/littlemill.c b/sound/soc/samsung/littlemill.c
new file mode 100644
index 000000000..31a820eb0
--- /dev/null
+++ b/sound/soc/samsung/littlemill.c
@@ -0,0 +1,328 @@
+/*
+ * Littlemill audio support
+ *
+ * Copyright 2011 Wolfson Microelectronics
+ *
+ * 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 <sound/soc.h>
+#include <sound/soc-dapm.h>
+#include <sound/jack.h>
+#include <linux/gpio.h>
+#include <linux/module.h>
+
+#include "../codecs/wm8994.h"
+
+static int sample_rate = 44100;
+
+static int littlemill_set_bias_level(struct snd_soc_card *card,
+					  struct snd_soc_dapm_context *dapm,
+					  enum snd_soc_bias_level level)
+{
+	struct snd_soc_dai *aif1_dai = card->rtd[0].codec_dai;
+	int ret;
+
+	if (dapm->dev != aif1_dai->dev)
+		return 0;
+
+	switch (level) {
+	case SND_SOC_BIAS_PREPARE:
+		/*
+		 * If we've not already clocked things via hw_params()
+		 * then do so now, otherwise these are noops.
+		 */
+		if (dapm->bias_level == SND_SOC_BIAS_STANDBY) {
+			ret = snd_soc_dai_set_pll(aif1_dai, WM8994_FLL1,
+						  WM8994_FLL_SRC_MCLK2, 32768,
+						  sample_rate * 512);
+			if (ret < 0) {
+				pr_err("Failed to start FLL: %d\n", ret);
+				return ret;
+			}
+
+			ret = snd_soc_dai_set_sysclk(aif1_dai,
+						     WM8994_SYSCLK_FLL1,
+						     sample_rate * 512,
+						     SND_SOC_CLOCK_IN);
+			if (ret < 0) {
+				pr_err("Failed to set SYSCLK: %d\n", ret);
+				return ret;
+			}
+		}
+		break;
+
+	default:
+		break;
+	}
+
+	return 0;
+}
+
+static int littlemill_set_bias_level_post(struct snd_soc_card *card,
+					       struct snd_soc_dapm_context *dapm,
+					       enum snd_soc_bias_level level)
+{
+	struct snd_soc_dai *aif1_dai = card->rtd[0].codec_dai;
+	int ret;
+
+	if (dapm->dev != aif1_dai->dev)
+		return 0;
+
+	switch (level) {
+	case SND_SOC_BIAS_STANDBY:
+		ret = snd_soc_dai_set_sysclk(aif1_dai, WM8994_SYSCLK_MCLK2,
+					     32768, SND_SOC_CLOCK_IN);
+		if (ret < 0) {
+			pr_err("Failed to switch away from FLL1: %d\n", ret);
+			return ret;
+		}
+
+		ret = snd_soc_dai_set_pll(aif1_dai, WM8994_FLL1,
+					  0, 0, 0);
+		if (ret < 0) {
+			pr_err("Failed to stop FLL1: %d\n", ret);
+			return ret;
+		}
+		break;
+
+	default:
+		break;
+	}
+
+	dapm->bias_level = level;
+
+	return 0;
+}
+
+static int littlemill_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;
+	int ret;
+
+	sample_rate = params_rate(params);
+
+	ret = snd_soc_dai_set_pll(codec_dai, WM8994_FLL1,
+				  WM8994_FLL_SRC_MCLK2, 32768,
+				  sample_rate * 512);
+	if (ret < 0) {
+		pr_err("Failed to start FLL: %d\n", ret);
+		return ret;
+	}
+
+	ret = snd_soc_dai_set_sysclk(codec_dai,
+				     WM8994_SYSCLK_FLL1,
+				     sample_rate * 512,
+				     SND_SOC_CLOCK_IN);
+	if (ret < 0) {
+		pr_err("Failed to set SYSCLK: %d\n", ret);
+		return ret;
+	}
+
+	return 0;
+}
+
+static struct snd_soc_ops littlemill_ops = {
+	.hw_params = littlemill_hw_params,
+};
+
+static const struct snd_soc_pcm_stream baseband_params = {
+	.formats = SNDRV_PCM_FMTBIT_S32_LE,
+	.rate_min = 8000,
+	.rate_max = 8000,
+	.channels_min = 2,
+	.channels_max = 2,
+};
+
+static struct snd_soc_dai_link littlemill_dai[] = {
+	{
+		.name = "CPU",
+		.stream_name = "CPU",
+		.cpu_dai_name = "samsung-i2s.0",
+		.codec_dai_name = "wm8994-aif1",
+		.platform_name = "samsung-i2s.0",
+		.codec_name = "wm8994-codec",
+		.dai_fmt = SND_SOC_DAIFMT_I2S | SND_SOC_DAIFMT_NB_NF
+				| SND_SOC_DAIFMT_CBM_CFM,
+		.ops = &littlemill_ops,
+	},
+	{
+		.name = "Baseband",
+		.stream_name = "Baseband",
+		.cpu_dai_name = "wm8994-aif2",
+		.codec_dai_name = "wm1250-ev1",
+		.codec_name = "wm1250-ev1.1-0027",
+		.dai_fmt = SND_SOC_DAIFMT_I2S | SND_SOC_DAIFMT_NB_NF
+				| SND_SOC_DAIFMT_CBM_CFM,
+		.ignore_suspend = 1,
+		.params = &baseband_params,
+	},
+};
+
+static int bbclk_ev(struct snd_soc_dapm_widget *w,
+		    struct snd_kcontrol *kcontrol, int event)
+{
+	struct snd_soc_card *card = w->dapm->card;
+	struct snd_soc_dai *aif2_dai = card->rtd[1].cpu_dai;
+	int ret;
+
+	switch (event) {
+	case SND_SOC_DAPM_PRE_PMU:
+		ret = snd_soc_dai_set_pll(aif2_dai, WM8994_FLL2,
+					  WM8994_FLL_SRC_BCLK, 64 * 8000,
+					  8000 * 256);
+		if (ret < 0) {
+			pr_err("Failed to start FLL: %d\n", ret);
+			return ret;
+		}
+
+		ret = snd_soc_dai_set_sysclk(aif2_dai, WM8994_SYSCLK_FLL2,
+					     8000 * 256,
+					     SND_SOC_CLOCK_IN);
+		if (ret < 0) {
+			pr_err("Failed to set SYSCLK: %d\n", ret);
+			return ret;
+		}
+		break;
+	case SND_SOC_DAPM_POST_PMD:
+		ret = snd_soc_dai_set_sysclk(aif2_dai, WM8994_SYSCLK_MCLK2,
+					     32768, SND_SOC_CLOCK_IN);
+		if (ret < 0) {
+			pr_err("Failed to switch away from FLL2: %d\n", ret);
+			return ret;
+		}
+
+		ret = snd_soc_dai_set_pll(aif2_dai, WM8994_FLL2,
+					  0, 0, 0);
+		if (ret < 0) {
+			pr_err("Failed to stop FLL2: %d\n", ret);
+			return ret;
+		}
+		break;
+	default:
+		return -EINVAL;
+	}
+
+	return 0;
+}
+
+static const struct snd_kcontrol_new controls[] = {
+	SOC_DAPM_PIN_SWITCH("WM1250 Input"),
+	SOC_DAPM_PIN_SWITCH("WM1250 Output"),
+};
+
+static struct snd_soc_dapm_widget widgets[] = {
+	SND_SOC_DAPM_HP("Headphone", NULL),
+
+	SND_SOC_DAPM_MIC("AMIC", NULL),
+	SND_SOC_DAPM_MIC("DMIC", NULL),
+
+	SND_SOC_DAPM_SUPPLY_S("Baseband Clock", -1, SND_SOC_NOPM, 0, 0,
+			      bbclk_ev,
+			      SND_SOC_DAPM_PRE_PMU | SND_SOC_DAPM_POST_PMD),
+};
+
+static struct snd_soc_dapm_route audio_paths[] = {
+	{ "Headphone", NULL, "HPOUT1L" },
+	{ "Headphone", NULL, "HPOUT1R" },
+
+	{ "AMIC", NULL, "MICBIAS1" },   /* Default for AMICBIAS jumper */
+	{ "IN1LN", NULL, "AMIC" },
+
+	{ "DMIC", NULL, "MICBIAS2" },   /* Default for DMICBIAS jumper */
+	{ "DMIC1DAT", NULL, "DMIC" },
+	{ "DMIC2DAT", NULL, "DMIC" },
+
+	{ "AIF2CLK", NULL, "Baseband Clock" },
+};
+
+static struct snd_soc_jack littlemill_headset;
+
+static int littlemill_late_probe(struct snd_soc_card *card)
+{
+	struct snd_soc_codec *codec = card->rtd[0].codec;
+	struct snd_soc_dai *aif1_dai = card->rtd[0].codec_dai;
+	struct snd_soc_dai *aif2_dai = card->rtd[1].cpu_dai;
+	int ret;
+
+	ret = snd_soc_dai_set_sysclk(aif1_dai, WM8994_SYSCLK_MCLK2,
+				     32768, SND_SOC_CLOCK_IN);
+	if (ret < 0)
+		return ret;
+
+	ret = snd_soc_dai_set_sysclk(aif2_dai, WM8994_SYSCLK_MCLK2,
+				     32768, SND_SOC_CLOCK_IN);
+	if (ret < 0)
+		return ret;
+
+	ret = snd_soc_card_jack_new(card, "Headset",
+				    SND_JACK_HEADSET | SND_JACK_MECHANICAL |
+				    SND_JACK_BTN_0 | SND_JACK_BTN_1 |
+				    SND_JACK_BTN_2 | SND_JACK_BTN_3 |
+				    SND_JACK_BTN_4 | SND_JACK_BTN_5,
+				    &littlemill_headset, NULL, 0);
+	if (ret)
+		return ret;
+
+	/* This will check device compatibility itself */
+	wm8958_mic_detect(codec, &littlemill_headset, NULL, NULL, NULL, NULL);
+
+	/* As will this */
+	wm8994_mic_detect(codec, &littlemill_headset, 1);
+
+	return 0;
+}
+
+static struct snd_soc_card littlemill = {
+	.name = "Littlemill",
+	.owner = THIS_MODULE,
+	.dai_link = littlemill_dai,
+	.num_links = ARRAY_SIZE(littlemill_dai),
+
+	.set_bias_level = littlemill_set_bias_level,
+	.set_bias_level_post = littlemill_set_bias_level_post,
+
+	.controls = controls,
+	.num_controls = ARRAY_SIZE(controls),
+	.dapm_widgets = widgets,
+	.num_dapm_widgets = ARRAY_SIZE(widgets),
+	.dapm_routes = audio_paths,
+	.num_dapm_routes = ARRAY_SIZE(audio_paths),
+
+	.late_probe = littlemill_late_probe,
+};
+
+static int littlemill_probe(struct platform_device *pdev)
+{
+	struct snd_soc_card *card = &littlemill;
+	int ret;
+
+	card->dev = &pdev->dev;
+
+	ret = devm_snd_soc_register_card(&pdev->dev, card);
+	if (ret)
+		dev_err(&pdev->dev, "snd_soc_register_card() failed: %d\n",
+			ret);
+
+	return ret;
+}
+
+static struct platform_driver littlemill_driver = {
+	.driver = {
+		.name = "littlemill",
+		.pm = &snd_soc_pm_ops,
+	},
+	.probe = littlemill_probe,
+};
+
+module_platform_driver(littlemill_driver);
+
+MODULE_DESCRIPTION("Littlemill audio support");
+MODULE_AUTHOR("Mark Brown <broonie@opensource.wolfsonmicro.com>");
+MODULE_LICENSE("GPL");
+MODULE_ALIAS("platform:littlemill");