ASoC: add ak4613 support

Signed-off-by: Kuninori Morimoto <kuninori.morimoto.gx@renesas.com>
Signed-off-by: Mark Brown <broonie@kernel.org>

1 files changed, 469 insertions, 0 deletions

diff --git a/sound/soc/codecs/ak4613.c b/sound/soc/codecs/ak4613.c
new file mode 100644
index 000000000000..fd96a8f9e2d3
--- /dev/null
+++ b/sound/soc/codecs/ak4613.c
@@ -0,0 +1,469 @@
+/*
+ * ak4613.c  --  Asahi Kasei ALSA Soc Audio driver
+ *
+ * Copyright (C) 2015 Renesas Electronics Corporation
+ * Kuninori Morimoto <kuninori.morimoto.gx@renesas.com>
+ *
+ * Based on ak4642.c by Kuninori Morimoto
+ * Based on wm8731.c by Richard Purdie
+ * Based on ak4535.c by Richard Purdie
+ * Based on wm8753.c by Liam Girdwood
+ *
+ * This program is free software; you can redistribute it and/or modify
+ * it under the terms of the GNU General Public License version 2 as
+ * published by the Free Software Foundation.
+ */
+
+#include <linux/clk.h>
+#include <linux/i2c.h>
+#include <linux/slab.h>
+#include <linux/of_device.h>
+#include <linux/module.h>
+#include <linux/regmap.h>
+#include <sound/soc.h>
+#include <sound/pcm_params.h>
+
+#define PW_MGMT1        0x00 /* Power Management 1 */
+#define PW_MGMT2        0x01 /* Power Management 2 */
+#define PW_MGMT3        0x02 /* Power Management 3 */
+#define CTRL1           0x03 /* Control 1 */
+#define CTRL2           0x04 /* Control 2 */
+#define DEMP1           0x05 /* De-emphasis1 */
+#define DEMP2           0x06 /* De-emphasis2 */
+#define OFD             0x07 /* Overflow Detect */
+#define ZRD             0x08 /* Zero Detect */
+#define ICTRL           0x09 /* Input Control */
+#define OCTRL           0x0a /* Output Control */
+#define LOUT1           0x0b /* LOUT1 Volume Control */
+#define ROUT1           0x0c /* ROUT1 Volume Control */
+#define LOUT2           0x0d /* LOUT2 Volume Control */
+#define ROUT2           0x0e /* ROUT2 Volume Control */
+#define LOUT3           0x0f /* LOUT3 Volume Control */
+#define ROUT3           0x10 /* ROUT3 Volume Control */
+#define LOUT4           0x11 /* LOUT4 Volume Control */
+#define ROUT4           0x12 /* ROUT4 Volume Control */
+#define LOUT5           0x13 /* LOUT5 Volume Control */
+#define ROUT5           0x14 /* ROUT5 Volume Control */
+#define LOUT6           0x15 /* LOUT6 Volume Control */
+#define ROUT6           0x16 /* ROUT6 Volume Control */
+
+/* PW_MGMT1 */
+#define RSTN            BIT(0)
+#define PMDAC           BIT(1)
+#define PMADC           BIT(2)
+#define PMVR            BIT(3)
+
+/* PW_MGMT2 */
+#define PMAD_ALL        0x7
+
+/* PW_MGMT3 */
+#define PMDA_ALL        0x3f
+
+/* CTRL1 */
+#define DIF0            BIT(3)
+#define DIF1            BIT(4)
+#define DIF2            BIT(5)
+#define TDM0            BIT(6)
+#define TDM1            BIT(7)
+#define NO_FMT          (0xff)
+#define FMT_MASK        (0xf8)
+
+/* CTRL2 */
+#define DFS_NORMAL_SPEED        (0 << 2)
+#define DFS_DOUBLE_SPEED        (1 << 2)
+#define DFS_QUAD_SPEED          (2 << 2)
+
+struct ak4613_priv {
+        struct mutex lock;
+
+        unsigned int fmt;
+        u8 fmt_ctrl;
+        int cnt;
+};
+
+struct ak4613_formats {
+        unsigned int width;
+        unsigned int fmt;
+};
+
+struct ak4613_interface {
+        struct ak4613_formats capture;
+        struct ak4613_formats playback;
+};
+
+static const struct reg_default ak4613_reg[] = {
+        { 0x0,  0x0f }, { 0x1,  0x07 }, { 0x2,  0x3f }, { 0x3,  0x20 },
+        { 0x4,  0x20 }, { 0x5,  0x55 }, { 0x6,  0x05 }, { 0x7,  0x07 },
+        { 0x8,  0x0f }, { 0x9,  0x07 }, { 0xa,  0x3f }, { 0xb,  0x00 },
+        { 0xc,  0x00 }, { 0xd,  0x00 }, { 0xe,  0x00 }, { 0xf,  0x00 },
+        { 0x10, 0x00 }, { 0x11, 0x00 }, { 0x12, 0x00 }, { 0x13, 0x00 },
+        { 0x14, 0x00 }, { 0x15, 0x00 }, { 0x16, 0x00 },
+};
+
+#define AUDIO_IFACE_IDX_TO_VAL(i) (i << 3)
+#define AUDIO_IFACE(b, fmt) { b, SND_SOC_DAIFMT_##fmt }
+static const struct ak4613_interface ak4613_iface[] = {
+        /* capture */                           /* playback */
+        [0] = { AUDIO_IFACE(24, LEFT_J),        AUDIO_IFACE(16, RIGHT_J) },
+        [1] = { AUDIO_IFACE(24, LEFT_J),        AUDIO_IFACE(20, RIGHT_J) },
+        [2] = { AUDIO_IFACE(24, LEFT_J),        AUDIO_IFACE(24, RIGHT_J) },
+        [3] = { AUDIO_IFACE(24, LEFT_J),        AUDIO_IFACE(24, LEFT_J) },
+        [4] = { AUDIO_IFACE(24, I2S),           AUDIO_IFACE(24, I2S) },
+};
+
+static const struct regmap_config ak4613_regmap_cfg = {
+        .reg_bits               = 8,
+        .val_bits               = 8,
+        .max_register           = 0x16,
+        .reg_defaults           = ak4613_reg,
+        .num_reg_defaults       = ARRAY_SIZE(ak4613_reg),
+};
+
+static const struct of_device_id ak4613_of_match[] = {
+        { .compatible = "asahi-kasei,ak4613",   .data = &ak4613_regmap_cfg },
+        {},
+};
+MODULE_DEVICE_TABLE(of, ak4613_of_match);
+
+static const struct i2c_device_id ak4613_i2c_id[] = {
+        { "ak4613", (kernel_ulong_t)&ak4613_regmap_cfg },
+        { }
+};
+MODULE_DEVICE_TABLE(i2c, ak4613_i2c_id);
+
+static const struct snd_soc_dapm_widget ak4613_dapm_widgets[] = {
+
+        /* Outputs */
+        SND_SOC_DAPM_OUTPUT("LOUT1"),
+        SND_SOC_DAPM_OUTPUT("LOUT2"),
+        SND_SOC_DAPM_OUTPUT("LOUT3"),
+        SND_SOC_DAPM_OUTPUT("LOUT4"),
+        SND_SOC_DAPM_OUTPUT("LOUT5"),
+        SND_SOC_DAPM_OUTPUT("LOUT6"),
+
+        SND_SOC_DAPM_OUTPUT("ROUT1"),
+        SND_SOC_DAPM_OUTPUT("ROUT2"),
+        SND_SOC_DAPM_OUTPUT("ROUT3"),
+        SND_SOC_DAPM_OUTPUT("ROUT4"),
+        SND_SOC_DAPM_OUTPUT("ROUT5"),
+        SND_SOC_DAPM_OUTPUT("ROUT6"),
+
+        /* Inputs */
+        SND_SOC_DAPM_INPUT("LIN1"),
+        SND_SOC_DAPM_INPUT("LIN2"),
+
+        SND_SOC_DAPM_INPUT("RIN1"),
+        SND_SOC_DAPM_INPUT("RIN2"),
+
+        /* DAC */
+        SND_SOC_DAPM_DAC("DAC1", NULL, PW_MGMT3, 0, 0),
+        SND_SOC_DAPM_DAC("DAC2", NULL, PW_MGMT3, 1, 0),
+        SND_SOC_DAPM_DAC("DAC3", NULL, PW_MGMT3, 2, 0),
+        SND_SOC_DAPM_DAC("DAC4", NULL, PW_MGMT3, 3, 0),
+        SND_SOC_DAPM_DAC("DAC5", NULL, PW_MGMT3, 4, 0),
+        SND_SOC_DAPM_DAC("DAC6", NULL, PW_MGMT3, 5, 0),
+
+        /* ADC */
+        SND_SOC_DAPM_ADC("ADC1", NULL, PW_MGMT2, 0, 0),
+        SND_SOC_DAPM_ADC("ADC2", NULL, PW_MGMT2, 1, 0),
+};
+
+static const struct snd_soc_dapm_route ak4613_intercon[] = {
+        {"LOUT1", NULL, "DAC1"},
+        {"LOUT2", NULL, "DAC2"},
+        {"LOUT3", NULL, "DAC3"},
+        {"LOUT4", NULL, "DAC4"},
+        {"LOUT5", NULL, "DAC5"},
+        {"LOUT6", NULL, "DAC6"},
+
+        {"ROUT1", NULL, "DAC1"},
+        {"ROUT2", NULL, "DAC2"},
+        {"ROUT3", NULL, "DAC3"},
+        {"ROUT4", NULL, "DAC4"},
+        {"ROUT5", NULL, "DAC5"},
+        {"ROUT6", NULL, "DAC6"},
+
+        {"DAC1", NULL, "Playback"},
+        {"DAC2", NULL, "Playback"},
+        {"DAC3", NULL, "Playback"},
+        {"DAC4", NULL, "Playback"},
+        {"DAC5", NULL, "Playback"},
+        {"DAC6", NULL, "Playback"},
+
+        {"Capture", NULL, "ADC1"},
+        {"Capture", NULL, "ADC2"},
+
+        {"ADC1", NULL, "LIN1"},
+        {"ADC2", NULL, "LIN2"},
+
+        {"ADC1", NULL, "RIN1"},
+        {"ADC2", NULL, "RIN2"},
+};
+
+static void ak4613_dai_shutdown(struct snd_pcm_substream *substream,
+                               struct snd_soc_dai *dai)
+{
+        struct snd_soc_codec *codec = dai->codec;
+        struct ak4613_priv *priv = snd_soc_codec_get_drvdata(codec);
+        struct device *dev = codec->dev;
+
+        mutex_lock(&priv->lock);
+        priv->cnt--;
+        if (priv->cnt < 0) {
+                dev_err(dev, "unexpected counter error\n");
+                priv->cnt = 0;
+        }
+        if (!priv->cnt)
+                priv->fmt_ctrl = NO_FMT;
+        mutex_unlock(&priv->lock);
+}
+
+static int ak4613_dai_set_fmt(struct snd_soc_dai *dai, unsigned int fmt)
+{
+        struct snd_soc_codec *codec = dai->codec;
+        struct ak4613_priv *priv = snd_soc_codec_get_drvdata(codec);
+
+        fmt &= SND_SOC_DAIFMT_FORMAT_MASK;
+
+        switch (fmt) {
+        case SND_SOC_DAIFMT_RIGHT_J:
+        case SND_SOC_DAIFMT_LEFT_J:
+        case SND_SOC_DAIFMT_I2S:
+                priv->fmt = fmt;
+
+                break;
+        default:
+                return -EINVAL;
+        }
+
+        return 0;
+}
+
+static int ak4613_dai_hw_params(struct snd_pcm_substream *substream,
+                                struct snd_pcm_hw_params *params,
+                                struct snd_soc_dai *dai)
+{
+        struct snd_soc_codec *codec = dai->codec;
+        struct ak4613_priv *priv = snd_soc_codec_get_drvdata(codec);
+        const struct ak4613_formats *fmts;
+        struct device *dev = codec->dev;
+        unsigned int width = params_width(params);
+        unsigned int fmt = priv->fmt;
+        unsigned int rate;
+        int is_play = substream->stream == SNDRV_PCM_STREAM_PLAYBACK;
+        int i, ret;
+        u8 fmt_ctrl, ctrl2;
+
+        rate = params_rate(params);
+        switch (rate) {
+        case 32000:
+        case 44100:
+        case 48000:
+                ctrl2 = DFS_NORMAL_SPEED;
+                break;
+        case 88200:
+        case 96000:
+                ctrl2 = DFS_DOUBLE_SPEED;
+                break;
+        case 176400:
+        case 192000:
+                ctrl2 = DFS_QUAD_SPEED;
+                break;
+        default:
+                return -EINVAL;
+        }
+
+        /*
+         * FIXME
+         *
+         * It doesn't support TDM at this point
+         */
+        fmt_ctrl = NO_FMT;
+        for (i = 0; i < ARRAY_SIZE(ak4613_iface); i++) {
+                fmts = (is_play) ?      &ak4613_iface[i].playback :
+                                        &ak4613_iface[i].capture;
+
+                if (fmts->fmt != fmt)
+                        continue;
+
+                if (fmt == SND_SOC_DAIFMT_RIGHT_J) {
+                        if (fmts->width != width)
+                                continue;
+                } else {
+                        if (fmts->width < width)
+                                continue;
+                }
+
+                fmt_ctrl = AUDIO_IFACE_IDX_TO_VAL(i);
+                break;
+        }
+
+        ret = -EINVAL;
+        if (fmt_ctrl == NO_FMT)
+                goto hw_params_end;
+
+        mutex_lock(&priv->lock);
+        if ((priv->fmt_ctrl == NO_FMT) ||
+            (priv->fmt_ctrl == fmt_ctrl)) {
+                priv->fmt_ctrl = fmt_ctrl;
+                priv->cnt++;
+                ret = 0;
+        }
+        mutex_unlock(&priv->lock);
+
+        if (ret < 0)
+                goto hw_params_end;
+
+        snd_soc_update_bits(codec, CTRL1, FMT_MASK, fmt_ctrl);
+        snd_soc_write(codec, CTRL2, ctrl2);
+
+hw_params_end:
+        if (ret < 0)
+                dev_warn(dev, "unsupported data width/format combination\n");
+
+        return ret;
+}
+
+static int ak4613_set_bias_level(struct snd_soc_codec *codec,
+                                 enum snd_soc_bias_level level)
+{
+        u8 mgmt1 = 0;
+
+        switch (level) {
+        case SND_SOC_BIAS_ON:
+                mgmt1 |= RSTN;
+                /* fall through */
+        case SND_SOC_BIAS_PREPARE:
+                mgmt1 |= PMADC | PMDAC;
+                /* fall through */
+        case SND_SOC_BIAS_STANDBY:
+                mgmt1 |= PMVR;
+                /* fall through */
+        case SND_SOC_BIAS_OFF:
+        default:
+                break;
+        }
+
+        snd_soc_write(codec, PW_MGMT1, mgmt1);
+
+        return 0;
+}
+
+static const struct snd_soc_dai_ops ak4613_dai_ops = {
+        .shutdown       = ak4613_dai_shutdown,
+        .set_fmt        = ak4613_dai_set_fmt,
+        .hw_params      = ak4613_dai_hw_params,
+};
+
+#define AK4613_PCM_RATE         (SNDRV_PCM_RATE_32000  |\
+                                 SNDRV_PCM_RATE_44100  |\
+                                 SNDRV_PCM_RATE_48000  |\
+                                 SNDRV_PCM_RATE_64000  |\
+                                 SNDRV_PCM_RATE_88200  |\
+                                 SNDRV_PCM_RATE_96000  |\
+                                 SNDRV_PCM_RATE_176400 |\
+                                 SNDRV_PCM_RATE_192000)
+#define AK4613_PCM_FMTBIT       (SNDRV_PCM_FMTBIT_S16_LE |\
+                                 SNDRV_PCM_FMTBIT_S24_LE)
+
+static struct snd_soc_dai_driver ak4613_dai = {
+        .name = "ak4613-hifi",
+        .playback = {
+                .stream_name    = "Playback",
+                .channels_min   = 2,
+                .channels_max   = 2,
+                .rates          = AK4613_PCM_RATE,
+                .formats        = AK4613_PCM_FMTBIT,
+        },
+        .capture = {
+                .stream_name    = "Capture",
+                .channels_min   = 2,
+                .channels_max   = 2,
+                .rates          = AK4613_PCM_RATE,
+                .formats        = AK4613_PCM_FMTBIT,
+        },
+        .ops = &ak4613_dai_ops,
+        .symmetric_rates = 1,
+};
+
+static int ak4613_resume(struct snd_soc_codec *codec)
+{
+        struct regmap *regmap = dev_get_regmap(codec->dev, NULL);
+
+        regcache_mark_dirty(regmap);
+        return regcache_sync(regmap);
+}
+
+static struct snd_soc_codec_driver soc_codec_dev_ak4613 = {
+        .resume                 = ak4613_resume,
+        .set_bias_level         = ak4613_set_bias_level,
+        .dapm_widgets           = ak4613_dapm_widgets,
+        .num_dapm_widgets       = ARRAY_SIZE(ak4613_dapm_widgets),
+        .dapm_routes            = ak4613_intercon,
+        .num_dapm_routes        = ARRAY_SIZE(ak4613_intercon),
+};
+
+static int ak4613_i2c_probe(struct i2c_client *i2c,
+                            const struct i2c_device_id *id)
+{
+        struct device *dev = &i2c->dev;
+        struct device_node *np = dev->of_node;
+        const struct regmap_config *regmap_cfg;
+        struct regmap *regmap;
+        struct ak4613_priv *priv;
+
+        regmap_cfg = NULL;
+        if (np) {
+                const struct of_device_id *of_id;
+
+                of_id = of_match_device(ak4613_of_match, dev);
+                if (of_id)
+                        regmap_cfg = of_id->data;
+        } else {
+                regmap_cfg = (const struct regmap_config *)id->driver_data;
+        }
+
+        if (!regmap_cfg)
+                return -EINVAL;
+
+        priv = devm_kzalloc(dev, sizeof(*priv), GFP_KERNEL);
+        if (!priv)
+                return -ENOMEM;
+
+        priv->fmt_ctrl          = NO_FMT;
+        priv->cnt               = 0;
+
+        mutex_init(&priv->lock);
+
+        i2c_set_clientdata(i2c, priv);
+
+        regmap = devm_regmap_init_i2c(i2c, regmap_cfg);
+        if (IS_ERR(regmap))
+                return PTR_ERR(regmap);
+
+        return snd_soc_register_codec(dev, &soc_codec_dev_ak4613,
+                                      &ak4613_dai, 1);
+}
+
+static int ak4613_i2c_remove(struct i2c_client *client)
+{
+        snd_soc_unregister_codec(&client->dev);
+        return 0;
+}
+
+static struct i2c_driver ak4613_i2c_driver = {
+        .driver = {
+                .name = "ak4613-codec",
+                .owner = THIS_MODULE,
+                .of_match_table = ak4613_of_match,
+        },
+        .probe          = ak4613_i2c_probe,
+        .remove         = ak4613_i2c_remove,
+        .id_table       = ak4613_i2c_id,
+};
+
+module_i2c_driver(ak4613_i2c_driver);
+
+MODULE_DESCRIPTION("Soc AK4613 driver");
+MODULE_AUTHOR("Kuninori Morimoto <kuninori.morimoto.gx@renesas.com>");
+MODULE_LICENSE("GPL v2");