1 files changed, 253 insertions, 0 deletions

diff --git a/sound/soc/samsung/littlemill.c b/sound/soc/samsung/littlemill.c
new file mode 100644
index 000000000000..9dd818bde06f
--- /dev/null
+++ b/sound/soc/samsung/littlemill.c
@@ -0,0 +1,253 @@
+/*
+ * 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 *codec_dai = card->rtd[0].codec_dai;
+        int ret;
+
+        if (dapm->dev != codec_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(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;
+                        }
+                }
+                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 *codec_dai = card->rtd[0].codec_dai;
+        int ret;
+
+        if (dapm->dev != codec_dai->dev)
+                return 0;
+
+        switch (level) {
+        case SND_SOC_BIAS_STANDBY:
+                ret = snd_soc_dai_set_sysclk(codec_dai, WM8994_SYSCLK_MCLK2,
+                                             32768, SND_SOC_CLOCK_IN);
+                if (ret < 0) {
+                        pr_err("Failed to switch away from FLL: %d\n", ret);
+                        return ret;
+                }
+
+                ret = snd_soc_dai_set_pll(codec_dai, WM8994_FLL1,
+                                          0, 0, 0);
+                if (ret < 0) {
+                        pr_err("Failed to stop FLL: %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 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-audio",
+                .codec_name = "wm8994-codec",
+                .dai_fmt = SND_SOC_DAIFMT_I2S | SND_SOC_DAIFMT_NB_NF
+                                | SND_SOC_DAIFMT_CBM_CFM,
+                .ops = &littlemill_ops,
+        },
+};
+
+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),
+};
+
+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" },
+};
+
+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 *codec_dai = card->rtd[0].codec_dai;
+        int ret;
+
+        ret = snd_soc_dai_set_sysclk(codec_dai, WM8994_SYSCLK_MCLK2,
+                                     32768, SND_SOC_CLOCK_IN);
+        if (ret < 0)
+                return ret;
+
+        ret = snd_soc_jack_new(codec, "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);
+        if (ret)
+                return ret;
+
+        /* This will check device compatibility itself */
+        wm8958_mic_detect(codec, &littlemill_headset, NULL, NULL);
+
+        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,
+
+        .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 __devinit int littlemill_probe(struct platform_device *pdev)
+{
+        struct snd_soc_card *card = &littlemill;
+        int ret;
+
+        card->dev = &pdev->dev;
+
+        ret = snd_soc_register_card(card);
+        if (ret) {
+                dev_err(&pdev->dev, "snd_soc_register_card() failed: %d\n",
+                        ret);
+                return ret;
+        }
+
+        return 0;
+}
+
+static int __devexit littlemill_remove(struct platform_device *pdev)
+{
+        struct snd_soc_card *card = platform_get_drvdata(pdev);
+
+        snd_soc_unregister_card(card);
+
+        return 0;
+}
+
+static struct platform_driver littlemill_driver = {
+        .driver = {
+                .name = "littlemill",
+                .owner = THIS_MODULE,
+                .pm = &snd_soc_pm_ops,
+        },
+        .probe = littlemill_probe,
+        .remove = __devexit_p(littlemill_remove),
+};
+
+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");