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Subject[PATCH 2/2] ASoC: sunxi: add support for the on-chip codec on early Allwinner SoCs
Date
From: Emilio López <emilio@elopez.com.ar>

The sun4i, sun5i and sun7i SoC families have a built-in codec, capable
of both audio capture and playback.

While this is called a codec by Allwinner, it really is an in-SoC
combination of a codec and a DAI, with its own DAC/ADC and amplifiers
in a single memory-mapped controller.

The capture part has been left out for now, and will be added eventually.

Signed-off-by: Emilio López <emilio@elopez.com.ar>
Signed-off-by: Maxime Ripard <maxime.ripard@free-electrons.com>
---
sound/soc/Kconfig | 1 +
sound/soc/Makefile | 1 +
sound/soc/sunxi/Kconfig | 11 +
sound/soc/sunxi/Makefile | 2 +
sound/soc/sunxi/sun4i-codec.c | 720 ++++++++++++++++++++++++++++++++++++++++++
5 files changed, 735 insertions(+)
create mode 100644 sound/soc/sunxi/Kconfig
create mode 100644 sound/soc/sunxi/Makefile
create mode 100644 sound/soc/sunxi/sun4i-codec.c

diff --git a/sound/soc/Kconfig b/sound/soc/Kconfig
index 2ae9619443d1..79c12008c4f0 100644
--- a/sound/soc/Kconfig
+++ b/sound/soc/Kconfig
@@ -54,6 +54,7 @@ source "sound/soc/samsung/Kconfig"
source "sound/soc/sh/Kconfig"
source "sound/soc/sirf/Kconfig"
source "sound/soc/spear/Kconfig"
+source "sound/soc/sunxi/Kconfig"
source "sound/soc/tegra/Kconfig"
source "sound/soc/txx9/Kconfig"
source "sound/soc/ux500/Kconfig"
diff --git a/sound/soc/Makefile b/sound/soc/Makefile
index e189903fabf4..3bf920252435 100644
--- a/sound/soc/Makefile
+++ b/sound/soc/Makefile
@@ -36,6 +36,7 @@ obj-$(CONFIG_SND_SOC) += samsung/
obj-$(CONFIG_SND_SOC) += sh/
obj-$(CONFIG_SND_SOC) += sirf/
obj-$(CONFIG_SND_SOC) += spear/
+obj-$(CONFIG_SND_SOC) += sunxi/
obj-$(CONFIG_SND_SOC) += tegra/
obj-$(CONFIG_SND_SOC) += txx9/
obj-$(CONFIG_SND_SOC) += ux500/
diff --git a/sound/soc/sunxi/Kconfig b/sound/soc/sunxi/Kconfig
new file mode 100644
index 000000000000..84c72ec6ad73
--- /dev/null
+++ b/sound/soc/sunxi/Kconfig
@@ -0,0 +1,11 @@
+menu "Allwinner SoC Audio support"
+
+config SND_SUN4I_CODEC
+ tristate "Allwinner A10 Codec Support"
+ select SND_SOC_GENERIC_DMAENGINE_PCM
+ select REGMAP_MMIO
+ help
+ Select Y or M to add support for the Codec embedded in the Allwinner
+ A10 and affiliated SoCs.
+
+endmenu
diff --git a/sound/soc/sunxi/Makefile b/sound/soc/sunxi/Makefile
new file mode 100644
index 000000000000..ea8a08c881d6
--- /dev/null
+++ b/sound/soc/sunxi/Makefile
@@ -0,0 +1,2 @@
+obj-$(CONFIG_SND_SUN4I_CODEC) += sun4i-codec.o
+
diff --git a/sound/soc/sunxi/sun4i-codec.c b/sound/soc/sunxi/sun4i-codec.c
new file mode 100644
index 000000000000..6e83e62ef039
--- /dev/null
+++ b/sound/soc/sunxi/sun4i-codec.c
@@ -0,0 +1,720 @@
+/*
+ * Copyright 2014 Emilio López <emilio@elopez.com.ar>
+ * Copyright 2014 Jon Smirl <jonsmirl@gmail.com>
+ * Copyright 2015 Maxime Ripard <maxime.ripard@free-electrons.com>
+ *
+ * Based on the Allwinner SDK driver, released under the GPL.
+ *
+ * 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.
+ *
+ * This program is distributed in the hope that it will be useful,
+ * but WITHOUT ANY WARRANTY; without even the implied warranty of
+ * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
+ * GNU General Public License for more details.
+ */
+
+#include <linux/init.h>
+#include <linux/kernel.h>
+#include <linux/module.h>
+#include <linux/platform_device.h>
+#include <linux/delay.h>
+#include <linux/slab.h>
+#include <linux/of.h>
+#include <linux/of_platform.h>
+#include <linux/of_address.h>
+#include <linux/clk.h>
+#include <linux/regmap.h>
+
+#include <sound/core.h>
+#include <sound/pcm.h>
+#include <sound/pcm_params.h>
+#include <sound/soc.h>
+#include <sound/tlv.h>
+#include <sound/initval.h>
+#include <sound/dmaengine_pcm.h>
+
+/* Codec DAC register offsets and bit fields */
+#define SUN4I_CODEC_DAC_DPC (0x00)
+#define SUN4I_CODEC_DAC_DPC_EN_DA (31)
+#define SUN4I_CODEC_DAC_DPC_DVOL (12)
+#define SUN4I_CODEC_DAC_FIFOC (0x04)
+#define SUN4I_CODEC_DAC_FIFOC_DAC_FS (29)
+#define SUN4I_CODEC_DAC_FIFOC_FIR_VERSION (28)
+#define SUN4I_CODEC_DAC_FIFOC_SEND_LASAT (26)
+#define SUN4I_CODEC_DAC_FIFOC_TX_FIFO_MODE (24)
+#define SUN4I_CODEC_DAC_FIFOC_DRQ_CLR_CNT (21)
+#define SUN4I_CODEC_DAC_FIFOC_TX_TRIG_LEVEL (8)
+#define SUN4I_CODEC_DAC_FIFOC_MONO_EN (6)
+#define SUN4I_CODEC_DAC_FIFOC_TX_SAMPLE_BITS (5)
+#define SUN4I_CODEC_DAC_FIFOC_DAC_DRQ_EN (4)
+#define SUN4I_CODEC_DAC_FIFOC_FIFO_FLUSH (0)
+#define SUN4I_CODEC_DAC_FIFOS (0x08)
+#define SUN4I_CODEC_DAC_TXDATA (0x0c)
+#define SUN4I_CODEC_DAC_ACTL (0x10)
+#define SUN4I_CODEC_DAC_ACTL_DACAENR (31)
+#define SUN4I_CODEC_DAC_ACTL_DACAENL (30)
+#define SUN4I_CODEC_DAC_ACTL_MIXEN (29)
+#define SUN4I_CODEC_DAC_ACTL_LDACLMIXS (15)
+#define SUN4I_CODEC_DAC_ACTL_RDACRMIXS (14)
+#define SUN4I_CODEC_DAC_ACTL_LDACRMIXS (13)
+#define SUN4I_CODEC_DAC_ACTL_DACPAS (8)
+#define SUN4I_CODEC_DAC_ACTL_MIXPAS (7)
+#define SUN4I_CODEC_DAC_ACTL_PA_MUTE (6)
+#define SUN4I_CODEC_DAC_ACTL_PA_VOL (0)
+#define SUN4I_CODEC_DAC_TUNE (0x14)
+#define SUN4I_CODEC_DAC_DEBUG (0x18)
+
+/* Codec ADC register offsets and bit fields */
+#define SUN4I_CODEC_ADC_FIFOC (0x1c)
+#define SUN4I_CODEC_ADC_FIFOC_EN_AD (28)
+#define SUN4I_CODEC_ADC_FIFOC_RX_FIFO_MODE (24)
+#define SUN4I_CODEC_ADC_FIFOC_RX_TRIG_LEVEL (8)
+#define SUN4I_CODEC_ADC_FIFOC_MONO_EN (7)
+#define SUN4I_CODEC_ADC_FIFOC_RX_SAMPLE_BITS (6)
+#define SUN4I_CODEC_ADC_FIFOC_ADC_DRQ_EN (4)
+#define SUN4I_CODEC_ADC_FIFOC_FIFO_FLUSH (0)
+#define SUN4I_CODEC_ADC_FIFOS (0x20)
+#define SUN4I_CODEC_ADC_RXDATA (0x24)
+#define SUN4I_CODEC_ADC_ACTL (0x28)
+#define SUN4I_CODEC_ADC_ACTL_ADC_R_EN (31)
+#define SUN4I_CODEC_ADC_ACTL_ADC_L_EN (30)
+#define SUN4I_CODEC_ADC_ACTL_PREG1EN (29)
+#define SUN4I_CODEC_ADC_ACTL_PREG2EN (28)
+#define SUN4I_CODEC_ADC_ACTL_VMICEN (27)
+#define SUN4I_CODEC_ADC_ACTL_VADCG (20)
+#define SUN4I_CODEC_ADC_ACTL_ADCIS (17)
+#define SUN4I_CODEC_ADC_ACTL_PA_EN (4)
+#define SUN4I_CODEC_ADC_ACTL_DDE (3)
+#define SUN4I_CODEC_ADC_DEBUG (0x2c)
+
+/* Other various ADC registers */
+#define SUN4I_CODEC_DAC_TXCNT (0x30)
+#define SUN4I_CODEC_ADC_RXCNT (0x34)
+#define SUN4I_CODEC_AC_SYS_VERI (0x38)
+#define SUN4I_CODEC_AC_MIC_PHONE_CAL (0x3c)
+
+struct sun4i_codec {
+ struct device *dev;
+ struct regmap *regmap;
+ struct clk *clk_apb;
+ struct clk *clk_module;
+
+ struct snd_dmaengine_dai_dma_data playback_dma_data;
+};
+
+static void sun4i_codec_start_playback(struct sun4i_codec *scodec)
+{
+ /*
+ * FIXME: according to the BSP, we might need to drive a PA
+ * GPIO high here on some boards
+ */
+
+ /* Flush TX FIFO */
+ regmap_update_bits(scodec->regmap, SUN4I_CODEC_DAC_FIFOC,
+ BIT(SUN4I_CODEC_DAC_FIFOC_FIFO_FLUSH),
+ BIT(SUN4I_CODEC_DAC_FIFOC_FIFO_FLUSH));
+
+ /* Enable DAC DRQ */
+ regmap_update_bits(scodec->regmap, SUN4I_CODEC_DAC_FIFOC,
+ BIT(SUN4I_CODEC_DAC_FIFOC_DAC_DRQ_EN),
+ BIT(SUN4I_CODEC_DAC_FIFOC_DAC_DRQ_EN));
+}
+
+static void sun4i_codec_stop_playback(struct sun4i_codec *scodec)
+{
+ /*
+ * FIXME: according to the BSP, we might need to drive a PA
+ * GPIO low here on some boards
+ */
+
+ /* Disable DAC DRQ */
+ regmap_update_bits(scodec->regmap, SUN4I_CODEC_DAC_FIFOC,
+ BIT(SUN4I_CODEC_DAC_FIFOC_DAC_DRQ_EN),
+ 0);
+}
+
+static int sun4i_codec_trigger(struct snd_pcm_substream *substream, int cmd,
+ struct snd_soc_dai *dai)
+{
+ struct snd_soc_pcm_runtime *rtd = substream->private_data;
+ struct sun4i_codec *scodec = snd_soc_card_get_drvdata(rtd->card);
+
+ if (substream->stream != SNDRV_PCM_STREAM_PLAYBACK)
+ return -ENOTSUPP;
+
+ switch (cmd) {
+ case SNDRV_PCM_TRIGGER_START:
+ case SNDRV_PCM_TRIGGER_RESUME:
+ case SNDRV_PCM_TRIGGER_PAUSE_RELEASE:
+ sun4i_codec_start_playback(scodec);
+ break;
+
+ case SNDRV_PCM_TRIGGER_STOP:
+ case SNDRV_PCM_TRIGGER_SUSPEND:
+ case SNDRV_PCM_TRIGGER_PAUSE_PUSH:
+ sun4i_codec_stop_playback(scodec);
+ break;
+
+ default:
+ return -EINVAL;
+ }
+
+ return 0;
+}
+
+static int sun4i_codec_prepare(struct snd_pcm_substream *substream,
+ struct snd_soc_dai *dai)
+{
+ struct snd_soc_pcm_runtime *rtd = substream->private_data;
+ struct sun4i_codec *scodec = snd_soc_card_get_drvdata(rtd->card);
+ u32 val;
+
+ if (substream->stream != SNDRV_PCM_STREAM_PLAYBACK)
+ return -ENOTSUPP;
+
+ /* Flush the TX FIFO */
+ regmap_update_bits(scodec->regmap, SUN4I_CODEC_DAC_FIFOC,
+ BIT(SUN4I_CODEC_DAC_FIFOC_FIFO_FLUSH),
+ BIT(SUN4I_CODEC_DAC_FIFOC_FIFO_FLUSH));
+
+ /* Set TX FIFO Empty Trigger Level */
+ regmap_update_bits(scodec->regmap, SUN4I_CODEC_DAC_FIFOC,
+ 0x3f << SUN4I_CODEC_DAC_FIFOC_TX_TRIG_LEVEL,
+ 0xf << SUN4I_CODEC_DAC_FIFOC_TX_TRIG_LEVEL);
+
+ if (substream->runtime->rate > 32000)
+ /* Use 64 bits FIR filter */
+ val = 0;
+ else
+ /* Use 32 bits FIR filter */
+ val = BIT(SUN4I_CODEC_DAC_FIFOC_FIR_VERSION);
+
+ regmap_update_bits(scodec->regmap, SUN4I_CODEC_DAC_FIFOC,
+ BIT(SUN4I_CODEC_DAC_FIFOC_FIR_VERSION),
+ val);
+
+ /* Send zeros when we have an underrun */
+ regmap_update_bits(scodec->regmap, SUN4I_CODEC_DAC_FIFOC,
+ BIT(SUN4I_CODEC_DAC_FIFOC_SEND_LASAT),
+ 0);
+
+ return 0;
+}
+
+static unsigned long sun4i_codec_get_mod_freq(struct snd_pcm_hw_params *params)
+{
+ unsigned int rate = params_rate(params);
+
+ switch (rate) {
+ case 176400:
+ case 88200:
+ case 44100:
+ case 33075:
+ case 22050:
+ case 14700:
+ case 11025:
+ case 7350:
+ return 22579200;
+
+ case 192000:
+ case 96000:
+ case 48000:
+ case 32000:
+ case 24000:
+ case 16000:
+ case 12000:
+ case 8000:
+ return 24576000;
+
+ default:
+ return 0;
+ }
+}
+
+static int sun4i_codec_get_hw_rate(struct snd_pcm_hw_params *params)
+{
+ unsigned int rate = params_rate(params);
+
+ switch (rate) {
+ case 192000:
+ case 176400:
+ return 6;
+
+ case 96000:
+ case 88200:
+ return 7;
+
+ case 48000:
+ case 44100:
+ return 0;
+
+ case 32000:
+ case 33075:
+ return 1;
+
+ case 24000:
+ case 22050:
+ return 2;
+
+ case 16000:
+ case 14700:
+ return 3;
+
+ case 12000:
+ case 11025:
+ return 4;
+
+ case 8000:
+ case 7350:
+ return 5;
+
+ default:
+ return -EINVAL;
+ }
+}
+
+static int sun4i_codec_hw_params(struct snd_pcm_substream *substream,
+ struct snd_pcm_hw_params *params,
+ struct snd_soc_dai *dai)
+{
+ struct snd_soc_pcm_runtime *rtd = substream->private_data;
+ struct sun4i_codec *scodec = snd_soc_card_get_drvdata(rtd->card);
+ unsigned long clk_freq;
+ int hwrate;
+ u32 val;
+
+ if (substream->stream != SNDRV_PCM_STREAM_PLAYBACK)
+ return -ENOTSUPP;
+
+ clk_freq = sun4i_codec_get_mod_freq(params);
+ if (!clk_freq)
+ return -EINVAL;
+
+ if (clk_set_rate(scodec->clk_module, clk_freq))
+ return -EINVAL;
+
+ hwrate = sun4i_codec_get_hw_rate(params);
+ if (hwrate < 0)
+ return hwrate;
+
+ /* Set DAC sample rate */
+ regmap_update_bits(scodec->regmap, SUN4I_CODEC_DAC_FIFOC,
+ 7 << SUN4I_CODEC_DAC_FIFOC_DAC_FS,
+ hwrate << SUN4I_CODEC_DAC_FIFOC_DAC_FS);
+
+ /* Set the number of channels we want to use */
+ if (params_channels(params) == 1)
+ val = BIT(SUN4I_CODEC_DAC_FIFOC_MONO_EN);
+ else
+ val = 0;
+
+ regmap_update_bits(scodec->regmap, SUN4I_CODEC_DAC_FIFOC,
+ BIT(SUN4I_CODEC_DAC_FIFOC_MONO_EN),
+ val);
+
+ /* Set the number of sample bits to either 16 or 24 bits */
+ if (hw_param_interval(params, SNDRV_PCM_HW_PARAM_SAMPLE_BITS)->min == 32) {
+ regmap_update_bits(scodec->regmap, SUN4I_CODEC_DAC_FIFOC,
+ BIT(SUN4I_CODEC_DAC_FIFOC_TX_SAMPLE_BITS),
+ BIT(SUN4I_CODEC_DAC_FIFOC_TX_SAMPLE_BITS));
+
+ /* Set TX FIFO mode to padding the LSBs with 0 */
+ regmap_update_bits(scodec->regmap, SUN4I_CODEC_DAC_FIFOC,
+ BIT(SUN4I_CODEC_DAC_FIFOC_TX_FIFO_MODE),
+ 0);
+
+ scodec->playback_dma_data.addr_width = DMA_SLAVE_BUSWIDTH_4_BYTES;
+ } else {
+ regmap_update_bits(scodec->regmap, SUN4I_CODEC_DAC_FIFOC,
+ BIT(SUN4I_CODEC_DAC_FIFOC_TX_SAMPLE_BITS),
+ 0);
+
+ /* Set TX FIFO mode to repeat the MSB */
+ regmap_update_bits(scodec->regmap, SUN4I_CODEC_DAC_FIFOC,
+ BIT(SUN4I_CODEC_DAC_FIFOC_TX_FIFO_MODE),
+ BIT(SUN4I_CODEC_DAC_FIFOC_TX_FIFO_MODE));
+
+ scodec->playback_dma_data.addr_width = DMA_SLAVE_BUSWIDTH_2_BYTES;
+ }
+
+ return 0;
+}
+
+static int sun4i_codec_startup(struct snd_pcm_substream *substream,
+ struct snd_soc_dai *dai)
+{
+ struct snd_soc_pcm_runtime *rtd = substream->private_data;
+ struct sun4i_codec *scodec = snd_soc_card_get_drvdata(rtd->card);
+
+ /*
+ * Stop issuing DRQ when we have room for less than 16 samples
+ * in our TX FIFO
+ */
+ regmap_update_bits(scodec->regmap, SUN4I_CODEC_DAC_FIFOC,
+ 3 << SUN4I_CODEC_DAC_FIFOC_DRQ_CLR_CNT,
+ 3 << SUN4I_CODEC_DAC_FIFOC_DRQ_CLR_CNT);
+
+ return clk_prepare_enable(scodec->clk_module);
+}
+
+static void sun4i_codec_shutdown(struct snd_pcm_substream *substream,
+ struct snd_soc_dai *dai)
+{
+ struct snd_soc_pcm_runtime *rtd = substream->private_data;
+ struct sun4i_codec *scodec = snd_soc_card_get_drvdata(rtd->card);
+
+ clk_disable_unprepare(scodec->clk_module);
+}
+
+static const struct snd_soc_dai_ops sun4i_codec_dai_ops = {
+ .startup = sun4i_codec_startup,
+ .shutdown = sun4i_codec_shutdown,
+ .trigger = sun4i_codec_trigger,
+ .hw_params = sun4i_codec_hw_params,
+ .prepare = sun4i_codec_prepare,
+};
+
+static struct snd_soc_dai_driver sun4i_codec_dai = {
+ .name = "Codec",
+ .ops = &sun4i_codec_dai_ops,
+ .playback = {
+ .stream_name = "Codec Playback",
+ .channels_min = 1,
+ .channels_max = 2,
+ .rate_min = 8000,
+ .rate_max = 192000,
+ .rates = SNDRV_PCM_RATE_8000_48000 |
+ SNDRV_PCM_RATE_96000 |
+ SNDRV_PCM_RATE_192000 |
+ SNDRV_PCM_RATE_KNOT,
+ .formats = SNDRV_PCM_FMTBIT_S16_LE |
+ SNDRV_PCM_FMTBIT_S32_LE,
+ .sig_bits = 24,
+ },
+};
+
+/*** Codec ***/
+static const struct snd_kcontrol_new sun4i_codec_pa_mute =
+ SOC_DAPM_SINGLE("Switch", SUN4I_CODEC_DAC_ACTL,
+ SUN4I_CODEC_DAC_ACTL_PA_MUTE, 1, 0);
+
+static DECLARE_TLV_DB_SCALE(sun4i_codec_pa_volume_scale, -6300, 100, 1);
+
+static const struct snd_kcontrol_new sun4i_codec_widgets[] = {
+ SOC_SINGLE_TLV("PA Volume", SUN4I_CODEC_DAC_ACTL,
+ SUN4I_CODEC_DAC_ACTL_PA_VOL, 0x3F, 0,
+ sun4i_codec_pa_volume_scale),
+};
+
+static const struct snd_kcontrol_new sun4i_codec_left_mixer_controls[] = {
+ SOC_DAPM_SINGLE("Left DAC Playback Switch", SUN4I_CODEC_DAC_ACTL,
+ SUN4I_CODEC_DAC_ACTL_LDACLMIXS, 1, 0),
+};
+
+static const struct snd_kcontrol_new sun4i_codec_right_mixer_controls[] = {
+ SOC_DAPM_SINGLE("Right DAC Playback Switch", SUN4I_CODEC_DAC_ACTL,
+ SUN4I_CODEC_DAC_ACTL_RDACRMIXS, 1, 0),
+ SOC_DAPM_SINGLE("Left DAC Playback Switch", SUN4I_CODEC_DAC_ACTL,
+ SUN4I_CODEC_DAC_ACTL_LDACRMIXS, 1, 0),
+};
+
+static const struct snd_kcontrol_new sun4i_codec_pa_mixer_controls[] = {
+ SOC_DAPM_SINGLE("DAC Playback Switch", SUN4I_CODEC_DAC_ACTL,
+ SUN4I_CODEC_DAC_ACTL_DACPAS, 1, 0),
+ SOC_DAPM_SINGLE("Mixer Playback Switch", SUN4I_CODEC_DAC_ACTL,
+ SUN4I_CODEC_DAC_ACTL_MIXPAS, 1, 0),
+};
+
+static const struct snd_soc_dapm_widget sun4i_codec_dapm_widgets[] = {
+ /* Digital parts of the DACs */
+ SND_SOC_DAPM_SUPPLY("DAC", SUN4I_CODEC_DAC_DPC,
+ SUN4I_CODEC_DAC_DPC_EN_DA, 0,
+ NULL, 0),
+
+ /* Analog parts of the DACs */
+ SND_SOC_DAPM_DAC("Left DAC", "Codec Playback", SUN4I_CODEC_DAC_ACTL,
+ SUN4I_CODEC_DAC_ACTL_DACAENL, 0),
+ SND_SOC_DAPM_DAC("Right DAC", "Codec Playback", SUN4I_CODEC_DAC_ACTL,
+ SUN4I_CODEC_DAC_ACTL_DACAENR, 0),
+
+ /* Mixers */
+ SND_SOC_DAPM_MIXER("Left Mixer", SND_SOC_NOPM, 0, 0,
+ sun4i_codec_left_mixer_controls,
+ ARRAY_SIZE(sun4i_codec_left_mixer_controls)),
+ SND_SOC_DAPM_MIXER("Right Mixer", SND_SOC_NOPM, 0, 0,
+ sun4i_codec_right_mixer_controls,
+ ARRAY_SIZE(sun4i_codec_right_mixer_controls)),
+
+ /* Global Mixer Enable */
+ SND_SOC_DAPM_SUPPLY("Mixer Enable", SUN4I_CODEC_DAC_ACTL,
+ SUN4I_CODEC_DAC_ACTL_MIXEN, 0, NULL, 0),
+
+ /* Pre-Amplifier */
+ SND_SOC_DAPM_MIXER("Pre-Amplifier", SUN4I_CODEC_ADC_ACTL,
+ SUN4I_CODEC_ADC_ACTL_PA_EN, 0,
+ sun4i_codec_pa_mixer_controls,
+ ARRAY_SIZE(sun4i_codec_pa_mixer_controls)),
+ SND_SOC_DAPM_SWITCH("Pre-Amplifier Mute", SND_SOC_NOPM, 0, 0,
+ &sun4i_codec_pa_mute),
+
+ SND_SOC_DAPM_OUTPUT("HP Right"),
+ SND_SOC_DAPM_OUTPUT("HP Left"),
+};
+
+static const struct snd_soc_dapm_route sun4i_codec_dapm_routes[] = {
+ /* Left DAC Routes */
+ { "Left DAC", NULL, "DAC" },
+
+ /* Right DAC Routes */
+ { "Right DAC", NULL, "DAC" },
+
+ /* Right Mixer Routes */
+ { "Right Mixer", NULL, "Mixer Enable" },
+ { "Right Mixer", "Left DAC Playback Switch", "Left DAC" },
+ { "Right Mixer", "Right DAC Playback Switch", "Right DAC" },
+
+ /* Left Mixer Routes */
+ { "Left Mixer", NULL, "Mixer Enable" },
+ { "Left Mixer", "Left DAC Playback Switch", "Left DAC" },
+
+ /* Pre-Amplifier Mixer Routes */
+ { "Pre-Amplifier", "Mixer Playback Switch", "Left Mixer" },
+ { "Pre-Amplifier", "Mixer Playback Switch", "Right Mixer" },
+ { "Pre-Amplifier", "DAC Playback Switch", "Left DAC" },
+ { "Pre-Amplifier", "DAC Playback Switch", "Right DAC" },
+
+ /* PA -> HP path */
+ { "Pre-Amplifier Mute", "Switch", "Pre-Amplifier" },
+ { "HP Right", NULL, "Pre-Amplifier Mute" },
+ { "HP Left", NULL, "Pre-Amplifier Mute" },
+};
+
+static struct snd_soc_codec_driver sun4i_codec_codec = {
+ .controls = sun4i_codec_widgets,
+ .num_controls = ARRAY_SIZE(sun4i_codec_widgets),
+ .dapm_widgets = sun4i_codec_dapm_widgets,
+ .num_dapm_widgets = ARRAY_SIZE(sun4i_codec_dapm_widgets),
+ .dapm_routes = sun4i_codec_dapm_routes,
+ .num_dapm_routes = ARRAY_SIZE(sun4i_codec_dapm_routes),
+};
+
+static const struct snd_soc_component_driver sun4i_codec_component = {
+ .name = "sun4i-codec",
+};
+
+#define SUN4I_CODEC_RATES SNDRV_PCM_RATE_8000_192000
+#define SUN4I_CODEC_FORMATS (SNDRV_PCM_FMTBIT_S16_LE | \
+ SNDRV_PCM_FMTBIT_S32_LE)
+
+static int sun4i_codec_dai_probe(struct snd_soc_dai *dai)
+{
+ struct snd_soc_card *card = snd_soc_dai_get_drvdata(dai);
+ struct sun4i_codec *scodec = snd_soc_card_get_drvdata(card);
+
+ snd_soc_dai_init_dma_data(dai, &scodec->playback_dma_data,
+ NULL);
+
+ return 0;
+}
+
+static struct snd_soc_dai_driver dummy_cpu_dai = {
+ .name = "sun4i-codec-cpu-dai",
+ .probe = sun4i_codec_dai_probe,
+ .playback = {
+ .stream_name = "Playback",
+ .channels_min = 1,
+ .channels_max = 2,
+ .rates = SUN4I_CODEC_RATES,
+ .formats = SUN4I_CODEC_FORMATS,
+ .sig_bits = 24,
+ },
+};
+
+static const struct regmap_config sun4i_codec_regmap_config = {
+ .reg_bits = 32,
+ .reg_stride = 4,
+ .val_bits = 32,
+ .max_register = SUN4I_CODEC_AC_MIC_PHONE_CAL,
+};
+
+static const struct of_device_id sun4i_codec_of_match[] = {
+ { .compatible = "allwinner,sun4i-a10-codec" },
+ { .compatible = "allwinner,sun7i-a20-codec" },
+ {}
+};
+MODULE_DEVICE_TABLE(of, sun4i_codec_of_match);
+
+static struct snd_soc_dai_link *sun4i_codec_create_link(struct device *dev,
+ int *num_links)
+{
+ struct snd_soc_dai_link *link = devm_kzalloc(dev, sizeof(*link),
+ GFP_KERNEL);
+ if (!link)
+ return NULL;
+
+ link->name = "cdc";
+ link->stream_name = "CDC PCM";
+ link->codec_dai_name = "Codec";
+ link->cpu_dai_name = dev_name(dev);
+ link->codec_name = dev_name(dev);
+ link->platform_name = dev_name(dev);
+ link->dai_fmt = SND_SOC_DAIFMT_I2S;
+
+ *num_links = 1;
+
+ return link;
+};
+
+static struct snd_soc_card *sun4i_codec_create_card(struct device *dev)
+{
+ struct snd_soc_card *card;
+ int ret;
+
+ card = devm_kzalloc(dev, sizeof(*card), GFP_KERNEL);
+ if (!card)
+ return NULL;
+
+ card->dai_link = sun4i_codec_create_link(dev, &card->num_links);
+ if (!card->dai_link)
+ return NULL;
+
+ card->dev = dev;
+ card->name = "sun4i-codec";
+
+ ret = snd_soc_of_parse_audio_routing(card, "routing");
+ if (ret) {
+ dev_err(dev, "Failed to create our audio routing\n");
+ return NULL;
+ }
+
+ return card;
+};
+
+static int sun4i_codec_probe(struct platform_device *pdev)
+{
+ struct snd_soc_card *card;
+ struct sun4i_codec *scodec;
+ struct resource *res;
+ void __iomem *base;
+ int ret;
+
+ scodec = devm_kzalloc(&pdev->dev, sizeof(*scodec), GFP_KERNEL);
+ if (!scodec)
+ return -ENOMEM;
+
+ scodec->dev = &pdev->dev;
+
+ res = platform_get_resource(pdev, IORESOURCE_MEM, 0);
+ base = devm_ioremap_resource(&pdev->dev, res);
+ if (IS_ERR(base)) {
+ dev_err(&pdev->dev, "Failed to map the registers\n");
+ return PTR_ERR(base);
+ }
+
+ scodec->regmap = devm_regmap_init_mmio(&pdev->dev, base,
+ &sun4i_codec_regmap_config);
+ if (IS_ERR(scodec->regmap)) {
+ dev_err(&pdev->dev, "Failed to create our regmap\n");
+ return PTR_ERR(scodec->regmap);
+ }
+
+ /* Get the clocks from the DT */
+ scodec->clk_apb = devm_clk_get(&pdev->dev, "apb");
+ if (IS_ERR(scodec->clk_apb)) {
+ dev_err(&pdev->dev, "Failed to get the APB clock\n");
+ return PTR_ERR(scodec->clk_apb);
+ }
+
+ scodec->clk_module = devm_clk_get(&pdev->dev, "codec");
+ if (IS_ERR(scodec->clk_module)) {
+ dev_err(&pdev->dev, "Failed to get the module clock\n");
+ return PTR_ERR(scodec->clk_module);
+ }
+
+ /* Enable the bus clock */
+ if (clk_prepare_enable(scodec->clk_apb)) {
+ dev_err(&pdev->dev, "Failed to enable the APB clock\n");
+ return -EINVAL;
+ }
+
+ /* DMA configuration for TX FIFO */
+ scodec->playback_dma_data.addr = res->start + SUN4I_CODEC_DAC_TXDATA;
+ scodec->playback_dma_data.maxburst = 4;
+ scodec->playback_dma_data.addr_width = DMA_SLAVE_BUSWIDTH_2_BYTES;
+
+ ret = snd_soc_register_codec(&pdev->dev, &sun4i_codec_codec,
+ &sun4i_codec_dai, 1);
+ if (ret) {
+ dev_err(&pdev->dev, "Failed to register our codec\n");
+ goto err_clk_disable;
+ }
+
+ ret = devm_snd_soc_register_component(&pdev->dev,
+ &sun4i_codec_component,
+ &dummy_cpu_dai, 1);
+ if (ret) {
+ dev_err(&pdev->dev, "Failed to register our DAI\n");
+ goto err_unregister_codec;
+ }
+
+ ret = devm_snd_dmaengine_pcm_register(&pdev->dev, NULL, 0);
+ if (ret) {
+ dev_err(&pdev->dev, "Failed to register against DMAEngine\n");
+ goto err_unregister_codec;
+ }
+
+ card = sun4i_codec_create_card(&pdev->dev);
+ if (!card) {
+ dev_err(&pdev->dev, "Failed to create our card\n");
+ goto err_unregister_codec;
+ }
+
+ platform_set_drvdata(pdev, card);
+ snd_soc_card_set_drvdata(card, scodec);
+
+ ret = snd_soc_register_card(card);
+ if (ret) {
+ dev_err(&pdev->dev, "Failed to register our card\n");
+ goto err_unregister_codec;
+ }
+
+ return 0;
+
+err_unregister_codec:
+ snd_soc_unregister_codec(&pdev->dev);
+err_clk_disable:
+ clk_disable_unprepare(scodec->clk_apb);
+ return ret;
+}
+
+static int sun4i_codec_remove(struct platform_device *pdev)
+{
+ struct snd_soc_card *card = platform_get_drvdata(pdev);
+ struct sun4i_codec *scodec = snd_soc_card_get_drvdata(card);
+
+ snd_soc_unregister_card(card);
+ snd_soc_unregister_codec(&pdev->dev);
+ clk_disable_unprepare(scodec->clk_apb);
+
+ return 0;
+}
+
+static struct platform_driver sun4i_codec_driver = {
+ .driver = {
+ .name = "sun4i-codec",
+ .owner = THIS_MODULE,
+ .of_match_table = sun4i_codec_of_match,
+ },
+ .probe = sun4i_codec_probe,
+ .remove = sun4i_codec_remove,
+};
+module_platform_driver(sun4i_codec_driver);
+
+MODULE_DESCRIPTION("Allwinner A10 codec driver");
+MODULE_AUTHOR("Emilio López <emilio@elopez.com.ar>");
+MODULE_AUTHOR("Jon Smirl <jonsmirl@gmail.com>");
+MODULE_AUTHOR("Maxime Ripard <maxime.ripard@free-electrons.com>");
+MODULE_LICENSE("GPL");
--
2.5.1


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