[PATCH v2 4/8] ASoC: mediatek: mt8195: support pcm in platform driver
Trevor Wu
trevor.wu at mediatek.com
Tue Jun 29 03:47:32 CEST 2021
This patch adds mt8195 pcm dai driver.
Signed-off-by: Trevor Wu <trevor.wu at mediatek.com>
---
sound/soc/mediatek/mt8195/mt8195-dai-pcm.c | 393 +++++++++++++++++++++
1 file changed, 393 insertions(+)
create mode 100644 sound/soc/mediatek/mt8195/mt8195-dai-pcm.c
diff --git a/sound/soc/mediatek/mt8195/mt8195-dai-pcm.c b/sound/soc/mediatek/mt8195/mt8195-dai-pcm.c
new file mode 100644
index 000000000000..bb0e2e4da14a
--- /dev/null
+++ b/sound/soc/mediatek/mt8195/mt8195-dai-pcm.c
@@ -0,0 +1,393 @@
+// SPDX-License-Identifier: GPL-2.0
+/*
+ * MediaTek ALSA SoC Audio DAI PCM I/F Control
+ *
+ * Copyright (c) 2020 MediaTek Inc.
+ * Author: Bicycle Tsai <bicycle.tsai at mediatek.com>
+ * Trevor Wu <trevor.wu at mediatek.com>
+ */
+
+#include <linux/regmap.h>
+#include <sound/pcm_params.h>
+#include "mt8195-afe-clk.h"
+#include "mt8195-afe-common.h"
+#include "mt8195-reg.h"
+
+enum {
+ MTK_DAI_PCM_FMT_I2S,
+ MTK_DAI_PCM_FMT_EIAJ,
+ MTK_DAI_PCM_FMT_MODEA,
+ MTK_DAI_PCM_FMT_MODEB,
+};
+
+enum {
+ MTK_DAI_PCM_CLK_A1SYS,
+ MTK_DAI_PCM_CLK_A2SYS,
+ MTK_DAI_PCM_CLK_26M_48K,
+ MTK_DAI_PCM_CLK_26M_441K,
+};
+
+struct mtk_dai_pcm_rate {
+ unsigned int rate;
+ unsigned int reg_value;
+};
+
+struct mtk_dai_pcmif_priv {
+ unsigned int slave_mode;
+ unsigned int lrck_inv;
+ unsigned int bck_inv;
+ unsigned int format;
+};
+
+static const struct mtk_dai_pcm_rate mtk_dai_pcm_rates[] = {
+ { .rate = 8000, .reg_value = 0, },
+ { .rate = 16000, .reg_value = 1, },
+ { .rate = 32000, .reg_value = 2, },
+ { .rate = 48000, .reg_value = 3, },
+ { .rate = 11025, .reg_value = 1, },
+ { .rate = 22050, .reg_value = 2, },
+ { .rate = 44100, .reg_value = 3, },
+};
+
+static int mtk_dai_pcm_mode(unsigned int rate)
+{
+ int i;
+
+ for (i = 0; i < ARRAY_SIZE(mtk_dai_pcm_rates); i++)
+ if (mtk_dai_pcm_rates[i].rate == rate)
+ return mtk_dai_pcm_rates[i].reg_value;
+
+ return -EINVAL;
+}
+
+static const struct snd_kcontrol_new mtk_dai_pcm_o000_mix[] = {
+ SOC_DAPM_SINGLE_AUTODISABLE("I000 Switch", AFE_CONN0, 0, 1, 0),
+ SOC_DAPM_SINGLE_AUTODISABLE("I070 Switch", AFE_CONN0_2, 6, 1, 0),
+};
+
+static const struct snd_kcontrol_new mtk_dai_pcm_o001_mix[] = {
+ SOC_DAPM_SINGLE_AUTODISABLE("I001 Switch", AFE_CONN1, 1, 1, 0),
+ SOC_DAPM_SINGLE_AUTODISABLE("I071 Switch", AFE_CONN1_2, 7, 1, 0),
+};
+
+static const struct snd_soc_dapm_widget mtk_dai_pcm_widgets[] = {
+ SND_SOC_DAPM_MIXER("I002", SND_SOC_NOPM, 0, 0, NULL, 0),
+ SND_SOC_DAPM_MIXER("I003", SND_SOC_NOPM, 0, 0, NULL, 0),
+ SND_SOC_DAPM_MIXER("O000", SND_SOC_NOPM, 0, 0,
+ mtk_dai_pcm_o000_mix,
+ ARRAY_SIZE(mtk_dai_pcm_o000_mix)),
+ SND_SOC_DAPM_MIXER("O001", SND_SOC_NOPM, 0, 0,
+ mtk_dai_pcm_o001_mix,
+ ARRAY_SIZE(mtk_dai_pcm_o001_mix)),
+
+ SND_SOC_DAPM_INPUT("PCM1_INPUT"),
+ SND_SOC_DAPM_OUTPUT("PCM1_OUTPUT"),
+};
+
+static const struct snd_soc_dapm_route mtk_dai_pcm_routes[] = {
+ {"I002", NULL, "PCM1 Capture"},
+ {"I003", NULL, "PCM1 Capture"},
+
+ {"O000", "I000 Switch", "I000"},
+ {"O001", "I001 Switch", "I001"},
+
+ {"O000", "I070 Switch", "I070"},
+ {"O001", "I071 Switch", "I071"},
+
+ {"PCM1 Playback", NULL, "O000"},
+ {"PCM1 Playback", NULL, "O001"},
+
+ {"PCM1_OUTPUT", NULL, "PCM1 Playback"},
+ {"PCM1 Capture", NULL, "PCM1_INPUT"},
+};
+
+static void mtk_dai_pcm_enable(struct mtk_base_afe *afe)
+{
+ regmap_update_bits(afe->regmap, PCM_INTF_CON1,
+ PCM_INTF_CON1_PCM_EN, PCM_INTF_CON1_PCM_EN);
+}
+
+static void mtk_dai_pcm_disable(struct mtk_base_afe *afe)
+{
+ regmap_update_bits(afe->regmap, PCM_INTF_CON1,
+ PCM_INTF_CON1_PCM_EN, 0x0);
+}
+
+static int mtk_dai_pcm_configure(struct snd_pcm_substream *substream,
+ struct snd_soc_dai *dai)
+{
+ struct snd_pcm_runtime * const runtime = substream->runtime;
+ struct mtk_base_afe *afe = snd_soc_dai_get_drvdata(dai);
+ struct mt8195_afe_private *afe_priv = afe->platform_priv;
+ struct mtk_dai_pcmif_priv *pcmif_priv = afe_priv->dai_priv[dai->id];
+ unsigned int slave_mode = pcmif_priv->slave_mode;
+ unsigned int lrck_inv = pcmif_priv->lrck_inv;
+ unsigned int bck_inv = pcmif_priv->bck_inv;
+ unsigned int fmt = pcmif_priv->format;
+ unsigned int bit_width = dai->sample_bits;
+ unsigned int val = 0;
+ unsigned int mask = 0;
+ int fs = 0;
+ int mode = 0;
+
+ /* sync freq mode */
+ fs = mt8195_afe_fs_timing(runtime->rate);
+ if (fs < 0)
+ return -EINVAL;
+ val |= PCM_INTF_CON2_SYNC_FREQ_MODE(fs);
+ mask |= PCM_INTF_CON2_SYNC_FREQ_MODE_MASK;
+
+ /* clk domain sel */
+ if (runtime->rate % 8000)
+ val |= PCM_INTF_CON2_CLK_DOMAIN_SEL(MTK_DAI_PCM_CLK_26M_441K);
+ else
+ val |= PCM_INTF_CON2_CLK_DOMAIN_SEL(MTK_DAI_PCM_CLK_26M_48K);
+ mask |= PCM_INTF_CON2_CLK_DOMAIN_SEL_MASK;
+
+ regmap_update_bits(afe->regmap, PCM_INTF_CON2, mask, val);
+
+ val = 0;
+ mask = 0;
+
+ /* pcm mode */
+ mode = mtk_dai_pcm_mode(runtime->rate);
+ if (mode < 0)
+ return -EINVAL;
+ val |= PCM_INTF_CON1_PCM_MODE(mode);
+ mask |= PCM_INTF_CON1_PCM_MODE_MASK;
+
+ /* pcm format */
+ val |= PCM_INTF_CON1_PCM_FMT(fmt);
+ mask |= PCM_INTF_CON1_PCM_FMT_MASK;
+
+ /* pcm sync length */
+ if (fmt == MTK_DAI_PCM_FMT_MODEA ||
+ fmt == MTK_DAI_PCM_FMT_MODEB)
+ val |= PCM_INTF_CON1_SYNC_LENGTH(1);
+ else
+ val |= PCM_INTF_CON1_SYNC_LENGTH(bit_width);
+ mask |= PCM_INTF_CON1_SYNC_LENGTH_MASK;
+
+ /* pcm bits, word length */
+ if (bit_width > 16) {
+ val |= PCM_INTF_CON1_PCM_24BIT;
+ val |= PCM_INTF_CON1_PCM_WLEN_64BCK;
+ } else {
+ val |= PCM_INTF_CON1_PCM_16BIT;
+ val |= PCM_INTF_CON1_PCM_WLEN_32BCK;
+ }
+ mask |= PCM_INTF_CON1_PCM_BIT_MASK;
+ mask |= PCM_INTF_CON1_PCM_WLEN_MASK;
+
+ /* master/slave */
+ if (!slave_mode) {
+ val |= PCM_INTF_CON1_PCM_MASTER;
+
+ if (lrck_inv)
+ val |= PCM_INTF_CON1_SYNC_OUT_INV;
+ if (bck_inv)
+ val |= PCM_INTF_CON1_BCLK_OUT_INV;
+ mask |= PCM_INTF_CON1_CLK_OUT_INV_MASK;
+ } else {
+ val |= PCM_INTF_CON1_PCM_SLAVE;
+
+ if (lrck_inv)
+ val |= PCM_INTF_CON1_SYNC_IN_INV;
+ if (bck_inv)
+ val |= PCM_INTF_CON1_BCLK_IN_INV;
+ mask |= PCM_INTF_CON1_CLK_IN_INV_MASK;
+
+ /* TODO: add asrc setting for slave mode */
+ }
+ mask |= PCM_INTF_CON1_PCM_M_S_MASK;
+
+ regmap_update_bits(afe->regmap, PCM_INTF_CON1, mask, val);
+
+ return 0;
+}
+
+/* dai ops */
+static int mtk_dai_pcm_startup(struct snd_pcm_substream *substream,
+ struct snd_soc_dai *dai)
+{
+ struct mtk_base_afe *afe = snd_soc_dai_get_drvdata(dai);
+ struct mt8195_afe_private *afe_priv = afe->platform_priv;
+
+ if (dai->component->active)
+ return 0;
+
+ mt8195_afe_enable_main_clock(afe);
+
+ mt8195_afe_enable_clk(afe, afe_priv->clk[MT8195_CLK_AUD_ASRC11]);
+ mt8195_afe_enable_clk(afe, afe_priv->clk[MT8195_CLK_AUD_ASRC12]);
+ mt8195_afe_enable_clk(afe, afe_priv->clk[MT8195_CLK_AUD_PCMIF]);
+
+ return 0;
+}
+
+static void mtk_dai_pcm_shutdown(struct snd_pcm_substream *substream,
+ struct snd_soc_dai *dai)
+{
+ struct mtk_base_afe *afe = snd_soc_dai_get_drvdata(dai);
+ struct mt8195_afe_private *afe_priv = afe->platform_priv;
+
+ if (dai->component->active)
+ return;
+
+ mtk_dai_pcm_disable(afe);
+
+ mt8195_afe_disable_clk(afe, afe_priv->clk[MT8195_CLK_AUD_PCMIF]);
+ mt8195_afe_disable_clk(afe, afe_priv->clk[MT8195_CLK_AUD_ASRC12]);
+ mt8195_afe_disable_clk(afe, afe_priv->clk[MT8195_CLK_AUD_ASRC11]);
+
+ mt8195_afe_disable_main_clock(afe);
+}
+
+static int mtk_dai_pcm_prepare(struct snd_pcm_substream *substream,
+ struct snd_soc_dai *dai)
+{
+ struct mtk_base_afe *afe = snd_soc_dai_get_drvdata(dai);
+ int ret = 0;
+
+ if (snd_soc_dai_stream_active(dai, SNDRV_PCM_STREAM_PLAYBACK) &&
+ snd_soc_dai_stream_active(dai, SNDRV_PCM_STREAM_CAPTURE))
+ return 0;
+
+ ret = mtk_dai_pcm_configure(substream, dai);
+ if (ret)
+ return ret;
+
+ mtk_dai_pcm_enable(afe);
+
+ return 0;
+}
+
+static int mtk_dai_pcm_set_fmt(struct snd_soc_dai *dai, unsigned int fmt)
+{
+ struct mtk_base_afe *afe = snd_soc_dai_get_drvdata(dai);
+ struct mt8195_afe_private *afe_priv = afe->platform_priv;
+ struct mtk_dai_pcmif_priv *pcmif_priv = afe_priv->dai_priv[dai->id];
+
+ dev_dbg(dai->dev, "%s fmt 0x%x\n", __func__, fmt);
+
+ switch (fmt & SND_SOC_DAIFMT_FORMAT_MASK) {
+ case SND_SOC_DAIFMT_I2S:
+ pcmif_priv->format = MTK_DAI_PCM_FMT_I2S;
+ break;
+ case SND_SOC_DAIFMT_DSP_A:
+ pcmif_priv->format = MTK_DAI_PCM_FMT_MODEA;
+ break;
+ case SND_SOC_DAIFMT_DSP_B:
+ pcmif_priv->format = MTK_DAI_PCM_FMT_MODEB;
+ break;
+ default:
+ return -EINVAL;
+ }
+
+ switch (fmt & SND_SOC_DAIFMT_INV_MASK) {
+ case SND_SOC_DAIFMT_NB_NF:
+ pcmif_priv->bck_inv = 0;
+ pcmif_priv->lrck_inv = 0;
+ break;
+ case SND_SOC_DAIFMT_NB_IF:
+ pcmif_priv->bck_inv = 0;
+ pcmif_priv->lrck_inv = 1;
+ break;
+ case SND_SOC_DAIFMT_IB_NF:
+ pcmif_priv->bck_inv = 1;
+ pcmif_priv->lrck_inv = 0;
+ break;
+ case SND_SOC_DAIFMT_IB_IF:
+ pcmif_priv->bck_inv = 1;
+ pcmif_priv->lrck_inv = 1;
+ break;
+ default:
+ return -EINVAL;
+ }
+
+ switch (fmt & SND_SOC_DAIFMT_MASTER_MASK) {
+ case SND_SOC_DAIFMT_CBM_CFM:
+ pcmif_priv->slave_mode = 1;
+ break;
+ case SND_SOC_DAIFMT_CBS_CFS:
+ pcmif_priv->slave_mode = 0;
+ break;
+ default:
+ return -EINVAL;
+ }
+
+ return 0;
+}
+
+static const struct snd_soc_dai_ops mtk_dai_pcm_ops = {
+ .startup = mtk_dai_pcm_startup,
+ .shutdown = mtk_dai_pcm_shutdown,
+ .prepare = mtk_dai_pcm_prepare,
+ .set_fmt = mtk_dai_pcm_set_fmt,
+};
+
+/* dai driver */
+#define MTK_PCM_RATES (SNDRV_PCM_RATE_8000_48000)
+
+#define MTK_PCM_FORMATS (SNDRV_PCM_FMTBIT_S16_LE |\
+ SNDRV_PCM_FMTBIT_S24_LE |\
+ SNDRV_PCM_FMTBIT_S32_LE)
+
+static struct snd_soc_dai_driver mtk_dai_pcm_driver[] = {
+ {
+ .name = "PCM1",
+ .id = MT8195_AFE_IO_PCM,
+ .playback = {
+ .stream_name = "PCM1 Playback",
+ .channels_min = 1,
+ .channels_max = 2,
+ .rates = MTK_PCM_RATES,
+ .formats = MTK_PCM_FORMATS,
+ },
+ .capture = {
+ .stream_name = "PCM1 Capture",
+ .channels_min = 1,
+ .channels_max = 2,
+ .rates = MTK_PCM_RATES,
+ .formats = MTK_PCM_FORMATS,
+ },
+ .ops = &mtk_dai_pcm_ops,
+ .symmetric_rate = 1,
+ .symmetric_sample_bits = 1,
+ },
+};
+
+static int init_pcmif_priv_data(struct mtk_base_afe *afe)
+{
+ struct mt8195_afe_private *afe_priv = afe->platform_priv;
+ struct mtk_dai_pcmif_priv *pcmif_priv;
+
+ pcmif_priv = devm_kzalloc(afe->dev, sizeof(struct mtk_dai_pcmif_priv),
+ GFP_KERNEL);
+ if (!pcmif_priv)
+ return -ENOMEM;
+
+ afe_priv->dai_priv[MT8195_AFE_IO_PCM] = pcmif_priv;
+ return 0;
+}
+
+int mt8195_dai_pcm_register(struct mtk_base_afe *afe)
+{
+ struct mtk_base_afe_dai *dai;
+
+ dai = devm_kzalloc(afe->dev, sizeof(*dai), GFP_KERNEL);
+ if (!dai)
+ return -ENOMEM;
+
+ list_add(&dai->list, &afe->sub_dais);
+
+ dai->dai_drivers = mtk_dai_pcm_driver;
+ dai->num_dai_drivers = ARRAY_SIZE(mtk_dai_pcm_driver);
+
+ dai->dapm_widgets = mtk_dai_pcm_widgets;
+ dai->num_dapm_widgets = ARRAY_SIZE(mtk_dai_pcm_widgets);
+ dai->dapm_routes = mtk_dai_pcm_routes;
+ dai->num_dapm_routes = ARRAY_SIZE(mtk_dai_pcm_routes);
+
+ return init_pcmif_priv_data(afe);
+}
--
2.18.0
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