Add driver for the digital imput to PWM output stereo
class D amplifier. It comes with filter, digitally
controlled gain, an equalizer and a dmphase filter.
Signed-off-by: Songjun Wu <songjun.wu@xxxxxxxxx>
---
sound/soc/atmel/Kconfig | 9 +
sound/soc/atmel/Makefile | 2 +
sound/soc/atmel/atmel-classd.c | 801 ++++++++++++++++++++++++++++++++++++++++
sound/soc/atmel/atmel-classd.h | 120 ++++++
4 files changed, 932 insertions(+)
create mode 100644 sound/soc/atmel/atmel-classd.c
create mode 100644 sound/soc/atmel/atmel-classd.h
diff --git a/sound/soc/atmel/Kconfig b/sound/soc/atmel/Kconfig
index 1489cd4..2d30464 100644
--- a/sound/soc/atmel/Kconfig
+++ b/sound/soc/atmel/Kconfig
@@ -59,4 +59,13 @@ config SND_AT91_SOC_SAM9X5_WM8731
help
Say Y if you want to add support for audio SoC on an
at91sam9x5 based board that is using WM8731 codec.
+
+config SND_ATMEL_SOC_CLASSD
+ tristate "Atmel ASoC driver for boards using CLASSD"
+ depends on ARCH_AT91 || COMPILE_TEST
+ select SND_ATMEL_SOC_DMA
+ select REGMAP_MMIO
+ help
+ Say Y if you want to add support for Atmel ASoC driver for boards using
+ CLASSD.
endif
diff --git a/sound/soc/atmel/Makefile b/sound/soc/atmel/Makefile
index b327e5c..f6f7db4 100644
--- a/sound/soc/atmel/Makefile
+++ b/sound/soc/atmel/Makefile
@@ -11,7 +11,9 @@ obj-$(CONFIG_SND_ATMEL_SOC_SSC) += snd-soc-atmel_ssc_dai.o
snd-soc-sam9g20-wm8731-objs := sam9g20_wm8731.o
snd-atmel-soc-wm8904-objs := atmel_wm8904.o
snd-soc-sam9x5-wm8731-objs := sam9x5_wm8731.o
+snd-atmel-soc-classd-objs := atmel-classd.o
obj-$(CONFIG_SND_AT91_SOC_SAM9G20_WM8731) += snd-soc-sam9g20-wm8731.o
obj-$(CONFIG_SND_ATMEL_SOC_WM8904) += snd-atmel-soc-wm8904.o
obj-$(CONFIG_SND_AT91_SOC_SAM9X5_WM8731) += snd-soc-sam9x5-wm8731.o
+obj-$(CONFIG_SND_ATMEL_SOC_CLASSD) += snd-atmel-soc-classd.o
diff --git a/sound/soc/atmel/atmel-classd.c b/sound/soc/atmel/atmel-classd.c
new file mode 100644
index 0000000..5ceefa9
--- /dev/null
+++ b/sound/soc/atmel/atmel-classd.c
@@ -0,0 +1,801 @@
+/* Atmel ALSA SoC Audio Class D Amplifier (CLASSD) driver
+ *
+ * Copyright (C) 2015 Atmel
+ *
+ * Author: Songjun Wu <songjun.wu@xxxxxxxxx>
+ *
+ * This program is free software; you can redistribute it and/or modify
+ * it under the terms of the GNU General Public License version 2 or later
+ * as published by the Free Software Foundation.
+ */
+
+#include <linux/of.h>
+#include <linux/clk.h>
+#include <linux/module.h>
+#include <linux/platform_device.h>
+#include <linux/regmap.h>
+#include <sound/core.h>
+#include <sound/dmaengine_pcm.h>
+#include <sound/pcm_params.h>
+#include <sound/tlv.h>
+#include "atmel-classd.h"
+
+struct atmel_classd_pdata {
+ bool non_overlap_enable;
+ int non_overlap_time;
+ int pwm_type;
+};
+
+struct atmel_classd {
+ dma_addr_t phy_base;
+ struct regmap *regmap;
+ struct clk *pclk;
+ struct clk *gclk;
+ struct clk *aclk;
+ int irq;
+ const struct atmel_classd_pdata *pdata;
+};
+
+#ifdef CONFIG_OF
+static const struct of_device_id atmel_classd_of_match[] = {
+ {
+ .compatible = "atmel,sama5d2-classd",
+ }, {
+ /* sentinel */
+ }
+};
+MODULE_DEVICE_TABLE(of, atmel_classd_of_match);
+
+static struct atmel_classd_pdata *atmel_classd_dt_init(struct device *dev)
+{
+ struct device_node *np = dev->of_node;
+ struct atmel_classd_pdata *pdata;
+ const char *pwm_type;
+ int ret;
+
+ if (!np) {
+ dev_err(dev, "device node not found\n");
+ return ERR_PTR(-EINVAL);
+ }
+
+ pdata = devm_kzalloc(dev, sizeof(*pdata), GFP_KERNEL);
+ if (!pdata)
+ return ERR_PTR(-ENOMEM);
+
+ ret = of_property_read_string(np, "atmel,pwm-type", &pwm_type);
+ if ((ret == 0) && (strcmp(pwm_type, "diff") == 0))
+ pdata->pwm_type = CLASSD_MR_PWMTYP_DIFF;
+ else
+ pdata->pwm_type = CLASSD_MR_PWMTYP_SINGLE;
+
+ ret = of_property_read_u32(np,
+ "atmel,non-overlap-time", &pdata->non_overlap_time);
+ if (ret != 0)
+ pdata->non_overlap_enable = false;
+ else
+ pdata->non_overlap_enable = true;
+
+ return pdata;
+}
+#else
+static inline struct atmel_classd_pdata *
+atmel_classd_dt_init(struct device *dev)
+{
+ return ERR_PTR(-EINVAL);
+}
+#endif
+
+#define ATMEL_CLASSD_RATES (SNDRV_PCM_RATE_8000 \
+ | SNDRV_PCM_RATE_16000 | SNDRV_PCM_RATE_22050 \
+ | SNDRV_PCM_RATE_32000 | SNDRV_PCM_RATE_44100 \
+ | SNDRV_PCM_RATE_48000 | SNDRV_PCM_RATE_88200 \
+ | SNDRV_PCM_RATE_96000)
+
+static const struct snd_pcm_hardware atmel_classd_hw = {
+ .info = SNDRV_PCM_INFO_MMAP
+ | SNDRV_PCM_INFO_MMAP_VALID
+ | SNDRV_PCM_INFO_INTERLEAVED
+ | SNDRV_PCM_INFO_RESUME
+ | SNDRV_PCM_INFO_PAUSE,
+ .formats = (SNDRV_PCM_FMTBIT_S16_LE),
+ .rates = ATMEL_CLASSD_RATES,
+ .rate_min = 8000,
+ .rate_max = 96000,
+ .channels_min = 2,
+ .channels_max = 2,
+ .buffer_bytes_max = 64 * 1024,
+ .period_bytes_min = 256,
+ .period_bytes_max = 32 * 1024,
+ .periods_min = 2,
+ .periods_max = 256,
+};
+
+#define ATMEL_CLASSD_PREALLOC_BUF_SIZE (64 * 1024)
+
+/* cpu dai component */
+static int atmel_classd_cpu_dai_startup(struct snd_pcm_substream *substream,
+ struct snd_soc_dai *cpu_dai)
+{
+ struct atmel_classd *dd = snd_soc_dai_get_drvdata(cpu_dai);
+
+ regmap_write(dd->regmap, CLASSD_THR, 0x0);
+
+ return clk_prepare_enable(dd->pclk);
+}
+
+static void atmel_classd_cpu_dai_shutdown(struct snd_pcm_substream *substream,
+ struct snd_soc_dai *cpu_dai)
+{
+ struct atmel_classd *dd = snd_soc_dai_get_drvdata(cpu_dai);
+
+ clk_disable_unprepare(dd->pclk);
+}
+
+static const struct snd_soc_dai_ops atmel_classd_cpu_dai_ops = {
+ .startup = atmel_classd_cpu_dai_startup,
+ .shutdown = atmel_classd_cpu_dai_shutdown,
+};
+
+static struct snd_soc_dai_driver atmel_classd_cpu_dai = {
+ .playback = {
+ .channels_min = 2,
+ .channels_max = 2,
+ .rates = ATMEL_CLASSD_RATES,
+ .formats = SNDRV_PCM_FMTBIT_S16_LE,},
+ .ops = &atmel_classd_cpu_dai_ops,
+};
+
+static const struct snd_soc_component_driver atmel_classd_cpu_dai_component = {
+ .name = "atmel-classd",
+};
+
+/* platform */
+static int
+atmel_classd_platform_configure_dma(struct snd_pcm_substream *substream,
+ struct snd_pcm_hw_params *params,
+ struct dma_slave_config *slave_config)
+{
+ struct snd_soc_pcm_runtime *rtd = substream->private_data;
+ struct atmel_classd *dd = snd_soc_dai_get_drvdata(rtd->cpu_dai);
+ int bits;
+
+ bits = params_physical_width(params);
+ if (bits != 16) {
+ dev_err(rtd->platform->dev,
+ "only supports 16-bit audio data\n");
+ return -EINVAL;
+ }
+
+ slave_config->direction = DMA_MEM_TO_DEV;
+ slave_config->dst_addr = dd->phy_base + CLASSD_THR;
+ slave_config->dst_addr_width = DMA_SLAVE_BUSWIDTH_4_BYTES;
+ slave_config->dst_maxburst = 1;
+ slave_config->src_maxburst = 1;
+ slave_config->device_fc = false;
+
+ return 0;
+}
+
+static const struct snd_dmaengine_pcm_config
+atmel_classd_dmaengine_pcm_config = {
+ .prepare_slave_config = atmel_classd_platform_configure_dma,
+ .pcm_hardware = &atmel_classd_hw,
+ .prealloc_buffer_size = ATMEL_CLASSD_PREALLOC_BUF_SIZE,
+};
+
+/* codec component */
+static const char * const swap_text[] = {
+ "No Swap", "Swap"
+};
+
+static SOC_ENUM_SINGLE_DECL(classd_swap_enum,
+ CLASSD_INTPMR, CLASSD_INTPMR_SWAP_SHIFT,
+ swap_text);
+
+static const char * const mono_text[] = {
+ "stereo", "mono"
+};
+
+static SOC_ENUM_SINGLE_DECL(classd_mono_enum,
+ CLASSD_INTPMR, CLASSD_INTPMR_MONO_SHIFT,
+ mono_text);
+
+static const char * const mono_mode_text[] = {
+ "mix", "sat", "left", "right"
+};
+
+static SOC_ENUM_SINGLE_DECL(classd_mono_mode_enum,
+ CLASSD_INTPMR, CLASSD_INTPMR_MONO_MODE_SHIFT,
+ mono_mode_text);
+
+static const char * const deemp_text[] = {
+ "disabled", "enabled"
+};
+
+static SOC_ENUM_SINGLE_DECL(classd_deemp_enum,
+ CLASSD_INTPMR, CLASSD_INTPMR_DEEMP_SHIFT,
+ deemp_text);
+
+static const char * const eqcfg_bass_text[] = {
+ "-12 dB", "-6 dB", "0 dB", "+6 dB", "+12 dB"
+};
+
+static const unsigned int eqcfg_bass_value[] = {
+ CLASSD_INTPMR_EQCFG_B_CUT_12,
+ CLASSD_INTPMR_EQCFG_B_CUT_6, CLASSD_INTPMR_EQCFG_FLAT,
+ CLASSD_INTPMR_EQCFG_B_BOOST_6, CLASSD_INTPMR_EQCFG_B_BOOST_12
+};
+
+static SOC_VALUE_ENUM_SINGLE_DECL(classd_eqcfg_bass_enum,
+ CLASSD_INTPMR, CLASSD_INTPMR_EQCFG_SHIFT, 0xf,
+ eqcfg_bass_text, eqcfg_bass_value);
+
+static const char * const eqcfg_medium_text[] = {
+ "-8 dB", "-3 dB", "0 dB", "+3 dB", "+8 dB"
+};
+
+static const unsigned int eqcfg_medium_value[] = {
+ CLASSD_INTPMR_EQCFG_M_CUT_8,
+ CLASSD_INTPMR_EQCFG_M_CUT_3, CLASSD_INTPMR_EQCFG_FLAT,
+ CLASSD_INTPMR_EQCFG_M_BOOST_3, CLASSD_INTPMR_EQCFG_M_BOOST_8
+};
+
+static SOC_VALUE_ENUM_SINGLE_DECL(classd_eqcfg_medium_enum,
+ CLASSD_INTPMR, CLASSD_INTPMR_EQCFG_SHIFT, 0xf,
+ eqcfg_medium_text, eqcfg_medium_value);
+
+static const char * const eqcfg_treble_text[] = {
+ "-12 dB", "-6 dB", "0 dB", "+6 dB", "+12 dB",
+};
+
+static const unsigned int eqcfg_treble_value[] = {
+ CLASSD_INTPMR_EQCFG_T_CUT_12,
+ CLASSD_INTPMR_EQCFG_T_CUT_6, CLASSD_INTPMR_EQCFG_FLAT,
+ CLASSD_INTPMR_EQCFG_T_BOOST_6, CLASSD_INTPMR_EQCFG_T_BOOST_12
+};
+
+static SOC_VALUE_ENUM_SINGLE_DECL(classd_eqcfg_treble_enum,
+ CLASSD_INTPMR, CLASSD_INTPMR_EQCFG_SHIFT, 0xf,
+ eqcfg_treble_text, eqcfg_treble_value);
+
+static int classd_get_eq_enum(struct snd_kcontrol *kcontrol,
+ struct snd_ctl_elem_value *ucontrol)
+{
+ struct snd_soc_component *component = snd_kcontrol_chip(kcontrol);
+ struct soc_enum *e = (struct soc_enum *)kcontrol->private_value;
+ unsigned int val, item;
+ unsigned int reg_val;
+ int ret;
+
+ ret = snd_soc_component_read(component, e->reg, ®_val);
+ if (ret)
+ return ret;
+ val = (reg_val >> e->shift_l) & e->mask;
+
+ if (strcmp(kcontrol->id.name, "EQ Bass") == 0) {
+ if (val > 4)
+ val = 0;
+ } else if (strcmp(kcontrol->id.name, "EQ Medium") == 0) {
+ if ((val > 8) || (val < 5))
+ val = 0;
+ } else if (strcmp(kcontrol->id.name, "EQ Treble") == 0) {
+ if ((val > 12) || (val < 9))
+ val = 0;
+ } else
+ return -EINVAL;
+
+ item = snd_soc_enum_val_to_item(e, val);
+ ucontrol->value.enumerated.item[0] = item;
+
+ return 0;
+}
+
+static const DECLARE_TLV_DB_SCALE(classd_digital_tlv, -7800, 100, 1);
+
+static const struct snd_kcontrol_new atmel_classd_snd_controls[] = {
+SOC_SINGLE_TLV("Left Volume", CLASSD_INTPMR,
+ CLASSD_INTPMR_ATTL_SHIFT, 78, 1, classd_digital_tlv),
+
+SOC_SINGLE_TLV("Right Volume", CLASSD_INTPMR,
+ CLASSD_INTPMR_ATTR_SHIFT, 78, 1, classd_digital_tlv),
+
+SOC_ENUM("De-emphasis", classd_deemp_enum),
+
+SOC_ENUM("Stereo", classd_mono_enum),
+
+SOC_ENUM("Swap", classd_swap_enum),
+
+SOC_ENUM("Mono Mode", classd_mono_mode_enum),
+
+SOC_ENUM_EXT("EQ Bass", classd_eqcfg_bass_enum,
+ classd_get_eq_enum, snd_soc_put_enum_double),
+
+SOC_ENUM_EXT("EQ Medium", classd_eqcfg_medium_enum,
+ classd_get_eq_enum, snd_soc_put_enum_double),
+
+SOC_ENUM_EXT("EQ Treble", classd_eqcfg_treble_enum,
+ classd_get_eq_enum, snd_soc_put_enum_double),
+};
+
+static const char * const pwm_type[] = {
+ "single-ended", "differential"
+};
+
+static int atmel_classd_codec_probe(struct snd_soc_codec *codec)
+{
+ struct atmel_classd *dd = snd_soc_codec_get_drvdata(codec);
+ const struct atmel_classd_pdata *pdata = dd->pdata;
+ u32 mask, val;
+
+ mask = CLASSD_MR_PWMTYP_MASK;
+ val = pdata->pwm_type << CLASSD_MR_PWMTYP_SHIFT;
+
+ mask |= CLASSD_MR_NON_OVERLAP_MASK;
+ if (pdata->non_overlap_enable) {
+ val |= (CLASSD_MR_NON_OVERLAP_EN
+ << CLASSD_MR_NON_OVERLAP_SHIFT);
+
+ mask |= CLASSD_MR_NOVR_VAL_MASK;
+ switch (pdata->non_overlap_time) {
+ case 5:
+ val |= (CLASSD_MR_NOVR_VAL_5NS
+ << CLASSD_MR_NOVR_VAL_SHIFT);
+ break;
+ case 10:
+ val |= (CLASSD_MR_NOVR_VAL_10NS
+ << CLASSD_MR_NOVR_VAL_SHIFT);
+ break;
+ case 15:
+ val |= (CLASSD_MR_NOVR_VAL_15NS
+ << CLASSD_MR_NOVR_VAL_SHIFT);
+ break;
+ case 20:
+ val |= (CLASSD_MR_NOVR_VAL_20NS
+ << CLASSD_MR_NOVR_VAL_SHIFT);
+ break;
+ default:
+ val |= (CLASSD_MR_NOVR_VAL_10NS
+ << CLASSD_MR_NOVR_VAL_SHIFT);
+ break;
+ }
+ }
+
+ snd_soc_update_bits(codec, CLASSD_MR, mask, val);
+
+ dev_info(codec->dev,
+ "PWM modulation type is %s, non-overlapping is %s\n",
+ pwm_type[pdata->pwm_type],
+ pdata->non_overlap_enable?"enabled":"disabled");
+
+ return 0;
+}
+
+static struct regmap *atmel_classd_codec_get_remap(struct device *dev)
+{
+ struct atmel_classd *dd = dev_get_drvdata(dev);
+
+ return dd->regmap;
+}
+
+static struct snd_soc_codec_driver soc_codec_dev_classd = {
+ .probe = atmel_classd_codec_probe,
+ .controls = atmel_classd_snd_controls,
+ .num_controls = ARRAY_SIZE(atmel_classd_snd_controls),
+ .get_regmap = atmel_classd_codec_get_remap,
+};
+
+static int atmel_classd_codec_dai_startup(struct snd_pcm_substream *substream,
+ struct snd_soc_dai *codec_dai)
+{
+ struct atmel_classd *dd = snd_soc_dai_get_drvdata(codec_dai);
+
+ clk_prepare_enable(dd->aclk);
+ clk_prepare_enable(dd->gclk);
+
+ return 0;
+}
+
+static int atmel_classd_codec_dai_digital_mute(struct snd_soc_dai *codec_dai,
+ int mute)
+{
+ struct snd_soc_codec *codec = codec_dai->codec;
+ u32 mask, val;
+
+ mask = CLASSD_MR_LMUTE_MASK | CLASSD_MR_RMUTE_MASK;
+
+ if (mute)
+ val = mask;
+ else
+ val = 0;
+
+ snd_soc_update_bits(codec, CLASSD_MR, mask, val);
+
+ return 0;
+}
+
+#define CLASSD_ACLK_RATE_11M2896_MPY_8 (112896 * 100 * 8)
+#define CLASSD_ACLK_RATE_12M288_MPY_8 (12228 * 1000 * 8)
+
+static struct {
+ int rate;
+ int sample_rate;
+ int dsp_clk;
+ unsigned long aclk_rate;
+} const sample_rates[] = {
+ { 8000, CLASSD_INTPMR_FRAME_8K,
+ CLASSD_INTPMR_DSP_CLK_FREQ_12M288, CLASSD_ACLK_RATE_12M288_MPY_8 },
+ { 16000, CLASSD_INTPMR_FRAME_16K,
+ CLASSD_INTPMR_DSP_CLK_FREQ_12M288, CLASSD_ACLK_RATE_12M288_MPY_8 },
+ { 32000, CLASSD_INTPMR_FRAME_32K,
+ CLASSD_INTPMR_DSP_CLK_FREQ_12M288, CLASSD_ACLK_RATE_12M288_MPY_8 },
+ { 48000, CLASSD_INTPMR_FRAME_48K,
+ CLASSD_INTPMR_DSP_CLK_FREQ_12M288, CLASSD_ACLK_RATE_12M288_MPY_8 },
+ { 96000, CLASSD_INTPMR_FRAME_96K,
+ CLASSD_INTPMR_DSP_CLK_FREQ_12M288, CLASSD_ACLK_RATE_12M288_MPY_8 },
+ { 22050, CLASSD_INTPMR_FRAME_22K,
+ CLASSD_INTPMR_DSP_CLK_FREQ_11M2896, CLASSD_ACLK_RATE_11M2896_MPY_8 },
+ { 44100, CLASSD_INTPMR_FRAME_44K,
+ CLASSD_INTPMR_DSP_CLK_FREQ_11M2896, CLASSD_ACLK_RATE_11M2896_MPY_8 },
+ { 88200, CLASSD_INTPMR_FRAME_88K,
+ CLASSD_INTPMR_DSP_CLK_FREQ_11M2896, CLASSD_ACLK_RATE_11M2896_MPY_8 },
+};
+
+static int
+atmel_classd_codec_dai_hw_params(struct snd_pcm_substream *substream,
+ struct snd_pcm_hw_params *params,
+ struct snd_soc_dai *codec_dai)
+{
+ struct snd_soc_codec *codec = codec_dai->codec;
+ struct atmel_classd *dd = snd_soc_dai_get_drvdata(codec_dai);
+ int fs;
+ int i, best, best_val, cur_val, ret;
+ u32 mask, val;
+
+ fs = params_rate(params);
+
+ best = 0;
+ best_val = abs(fs - sample_rates[0].rate);
+ for (i = 1; i < ARRAY_SIZE(sample_rates); i++) {
+ /* Closest match */
+ cur_val = abs(fs - sample_rates[i].rate);
+ if (cur_val < best_val) {
+ best = i;
+ best_val = cur_val;
+ }
+ }
+
+ dev_dbg(codec->dev,
+ "Selected SAMPLE_RATE of %dHz, ACLK_RATE of %ldHz\n",
+ sample_rates[best].rate, sample_rates[best].aclk_rate);
+
+ clk_disable_unprepare(dd->gclk);
+ clk_disable_unprepare(dd->aclk);
+
+ ret = clk_set_rate(dd->aclk, sample_rates[best].aclk_rate);
+ if (ret)
+ return ret;
+
+ mask = CLASSD_INTPMR_DSP_CLK_FREQ_MASK | CLASSD_INTPMR_FRAME_MASK;
+ val = (sample_rates[best].dsp_clk << CLASSD_INTPMR_DSP_CLK_FREQ_SHIFT)
+ | (sample_rates[best].sample_rate << CLASSD_INTPMR_FRAME_SHIFT);
+
+ snd_soc_update_bits(codec, CLASSD_INTPMR, mask, val);
+
+ clk_prepare_enable(dd->aclk);
+ clk_prepare_enable(dd->gclk);
+
+ return 0;
+}
+
+static void
+atmel_classd_codec_dai_shutdown(struct snd_pcm_substream *substream,
+ struct snd_soc_dai *codec_dai)
+{
+ struct atmel_classd *dd = snd_soc_dai_get_drvdata(codec_dai);
+
+ clk_disable_unprepare(dd->gclk);
+ clk_disable_unprepare(dd->aclk);
+}
+
+static int atmel_classd_codec_dai_prepare(struct snd_pcm_substream *substream,
+ struct snd_soc_dai *codec_dai)
+{
+ struct snd_soc_codec *codec = codec_dai->codec;
+
+ snd_soc_update_bits(codec, CLASSD_MR,
+ CLASSD_MR_LEN_MASK | CLASSD_MR_REN_MASK,
+ (CLASSD_MR_LEN_DIS << CLASSD_MR_LEN_SHIFT)
+ |(CLASSD_MR_REN_DIS << CLASSD_MR_REN_SHIFT));
+
+ return 0;
+}
+
+static int atmel_classd_codec_dai_trigger(struct snd_pcm_substream *substream,
+ int cmd, struct snd_soc_dai *codec_dai)
+{
+ struct snd_soc_codec *codec = codec_dai->codec;
+ u32 mask, val;
+
+ mask = CLASSD_MR_LEN_MASK | CLASSD_MR_REN_MASK;
+
+ switch (cmd) {
+ case SNDRV_PCM_TRIGGER_START:
+ case SNDRV_PCM_TRIGGER_RESUME:
+ case SNDRV_PCM_TRIGGER_PAUSE_RELEASE:
+ val = mask;
+ break;
+ case SNDRV_PCM_TRIGGER_STOP:
+ case SNDRV_PCM_TRIGGER_SUSPEND:
+ case SNDRV_PCM_TRIGGER_PAUSE_PUSH:
+ val = (CLASSD_MR_LEN_DIS << CLASSD_MR_LEN_SHIFT)
+ | (CLASSD_MR_REN_DIS << CLASSD_MR_REN_SHIFT);
+ break;
+ default:
+ return -EINVAL;
+ }
+
+ snd_soc_update_bits(codec, CLASSD_MR, mask, val);
+
+ return 0;
+}
+
+static const struct snd_soc_dai_ops atmel_classd_codec_dai_ops = {
+ .digital_mute = atmel_classd_codec_dai_digital_mute,
+ .startup = atmel_classd_codec_dai_startup,
+ .shutdown = atmel_classd_codec_dai_shutdown,
+ .hw_params = atmel_classd_codec_dai_hw_params,
+ .prepare = atmel_classd_codec_dai_prepare,
+ .trigger = atmel_classd_codec_dai_trigger,
+};
+
+#define ATMEL_CLASSD_CODEC_DAI_NAME "atmel-classd-hifi"
+
+static struct snd_soc_dai_driver atmel_classd_codec_dai = {
+ .name = ATMEL_CLASSD_CODEC_DAI_NAME,
+ .playback = {
+ .stream_name = "Playback",
+ .channels_min = 2,
+ .channels_max = 2,
+ .rates = ATMEL_CLASSD_RATES,
+ .formats = SNDRV_PCM_FMTBIT_S16_LE,
+ },
+ .ops = &atmel_classd_codec_dai_ops,
+};
+
+/* regmap configuration */
+static const struct reg_default atmel_classd_reg_defaults[] = {
+ { CLASSD_INTPMR, 0x00302727 },
+};
+
+#define ATMEL_CLASSD_REG_MAX 0xE4
+static const struct regmap_config atmel_classd_regmap_config = {
+ .reg_bits = 32,
+ .reg_stride = 4,
+ .val_bits = 32,
+ .max_register = ATMEL_CLASSD_REG_MAX,
+
+ .cache_type = REGCACHE_FLAT,
+ .reg_defaults = atmel_classd_reg_defaults,
+ .num_reg_defaults = ARRAY_SIZE(atmel_classd_reg_defaults),
+};
+
+static int atmel_classd_probe(struct platform_device *pdev)
+{
+ struct device *dev = &pdev->dev;
+ struct atmel_classd *dd;
+ struct resource *res;
+ void __iomem *io_base;
+ const struct atmel_classd_pdata *pdata;
+ int ret;
+
+ pdata = dev_get_platdata(dev);
+ if (!pdata) {
+ pdata = atmel_classd_dt_init(dev);
+ if (IS_ERR(pdata))
+ return PTR_ERR(pdata);
+ }
+
+ dd = devm_kzalloc(&pdev->dev, sizeof(*dd), GFP_KERNEL);
+ if (!dd)
+ return -ENOMEM;
+
+ dd->pdata = pdata;
+
+ platform_set_drvdata(pdev, dd);
+
+ dd->irq = platform_get_irq(pdev, 0);
+ if (dd->irq < 0) {
+ ret = dd->irq;
+ dev_err(&pdev->dev, "failed to could not get irq: %d\n", ret);
+ return ret;
+ }
+
+ dd->pclk = devm_clk_get(dev, "pclk");
+ if (IS_ERR(dd->pclk)) {
+ ret = PTR_ERR(dd->pclk);
+ dev_err(dev, "failed to get peripheral clock: %d\n", ret);
+ return ret;
+ }
+
+ dd->gclk = devm_clk_get(dev, "gclk");
+ if (IS_ERR(dd->aclk)) {
+ ret = PTR_ERR(dd->gclk);
+ dev_err(dev, "failed to get GCK clock: %d\n", ret);
+ return ret;
+ }
+
+ dd->aclk = devm_clk_get(dev, "aclk");
+ if (IS_ERR(dd->aclk)) {
+ ret = PTR_ERR(dd->aclk);
+ dev_err(dev, "failed to get audio clock: %d\n", ret);
+ return ret;
+ }
+
+ res = platform_get_resource(pdev, IORESOURCE_MEM, 0);
+ if (!res) {
+ dev_err(&pdev->dev, "no memory resource\n");
+ return -ENXIO;
+ }
+
+ io_base = devm_ioremap_resource(dev, res);
+ if (IS_ERR(io_base)) {
+ ret = PTR_ERR(io_base);
+ dev_err(dev, "failed to remap register memory: %d\n", ret);
+ return ret;
+ }
+
+ dd->phy_base = res->start;
+
+ dd->regmap = devm_regmap_init_mmio(dev, io_base,
+ &atmel_classd_regmap_config);
+ if (IS_ERR(dd->regmap)) {
+ ret = PTR_ERR(dd->regmap);
+ dev_err(dev, "failed to init register map: %d\n", ret);
+ return ret;
+ }
+
+ ret = devm_snd_soc_register_component(&pdev->dev,
+ &atmel_classd_cpu_dai_component,
+ &atmel_classd_cpu_dai, 1);
+ if (ret) {
+ dev_err(dev, "Could not register CPU DAI: %d\n", ret);
+ return ret;
+ }
+
+ ret = devm_snd_dmaengine_pcm_register(&pdev->dev,
+ &atmel_classd_dmaengine_pcm_config,
+ 0);
+ if (ret) {
+ dev_err(dev, "Could not register platform: %d\n", ret);
+ return ret;
+ }
+
+ ret = snd_soc_register_codec(dev, &soc_codec_dev_classd,
+ &atmel_classd_codec_dai, 1);
+ if (ret) {
+ dev_err(dev, "Could not register codec: %d\n", ret);
+ return ret;
+ }
+
+ dev_info(dev,
+ "Atmel Class D Amplifier (CLASSD) device at 0x%p (irq %d)\n",
+ io_base, dd->irq);
+
+ return 0;
+}
+
+static int atmel_classd_remove(struct platform_device *pdev)
+{
+ snd_soc_unregister_codec(&pdev->dev);
+ return 0;
+}
+
+static struct platform_driver classd_driver = {
+ .driver = {
+ .name = "atmel-classd",
+ .owner = THIS_MODULE,
+ .of_match_table = of_match_ptr(atmel_classd_of_match),
+ },
+ .probe = atmel_classd_probe,
+ .remove = atmel_classd_remove,
+};
+module_platform_driver(classd_driver);
+
+static struct snd_soc_dai_link atmel_asoc_classd_dailink = {
+ .name = "CLASSD",
+ .stream_name = "CLASSD PCM",
+ .codec_dai_name = ATMEL_CLASSD_CODEC_DAI_NAME,
+};
+
+static struct snd_soc_card atmel_asoc_classd_card = {
+ .owner = THIS_MODULE,
+ .dai_link = &atmel_asoc_classd_dailink,
+ .num_links = 1,
+};
+
+#ifdef CONFIG_OF
+static const struct of_device_id atmel_asoc_dt_ids[] = {
+ { .compatible = "atmel,asoc-classd", },
+ { }
+};
+#endif
+
+static int atmel_asoc_classd_dt_init(struct platform_device *pdev,
+ struct snd_soc_card *card)
+{
+ struct device_node *np = pdev->dev.of_node;
+ struct device_node *codec_np, *platform_np;
+ const char *cpu_dai_name;
+ struct snd_soc_dai_link *dailink = card->dai_link;
+ int ret;
+
+ if (!np) {
+ dev_err(&pdev->dev, "only device tree supported\n");
+ return -EINVAL;
+ }
+
+ ret = snd_soc_of_parse_card_name(card, "atmel,model");
+ if (ret) {
+ dev_err(&pdev->dev, "failed to parse card name\n");
+ return ret;
+ }
+
+ of_property_read_string(np, "atmel,audio-cpu-dai-name", &cpu_dai_name);
+ dailink->cpu_dai_name = cpu_dai_name;
+
+ platform_np = of_parse_phandle(np, "atmel,audio-platform", 0);
+ if (!platform_np) {
+ dev_err(&pdev->dev, "failed to get platform info\n");
+ ret = -EINVAL;
+ return ret;
+ }
+ dailink->platform_of_node = platform_np;
+ of_node_put(platform_np);
+
+ codec_np = of_parse_phandle(np, "atmel,audio-codec", 0);
+ if (!codec_np) {
+ dev_err(&pdev->dev, "failed to get codec info\n");
+ ret = -EINVAL;
+ return ret;
+ }
+ dailink->codec_of_node = codec_np;
+ of_node_put(codec_np);
+
+ return 0;
+}
+
+static int atmel_asoc_classd_probe(struct platform_device *pdev)
+{
+ struct snd_soc_card *card = &atmel_asoc_classd_card;
+ int ret;
+
+ card->dev = &pdev->dev;
+ ret = atmel_asoc_classd_dt_init(pdev, card);
+ if (ret) {
+ dev_err(&pdev->dev, "failed to init dt info\n");
+ return ret;
+ }
+
+ ret = devm_snd_soc_register_card(&pdev->dev, card);
+ if (ret) {
+ dev_err(&pdev->dev, "failed to register asoc card\n");
+ return ret;
+ }
+
+ return 0;
+}
+
+static struct platform_driver atmel_asoc_classd_driver = {
+ .driver = {
+ .name = "atmel-asoc-audio",
+ .of_match_table = of_match_ptr(atmel_asoc_dt_ids),
+ .pm = &snd_soc_pm_ops,
+ },
+ .probe = atmel_asoc_classd_probe,
+};
+
+module_platform_driver(atmel_asoc_classd_driver);
+
+MODULE_DESCRIPTION("Atmel ClassD driver under ALSA SoC architecture");
+MODULE_AUTHOR("Songjun Wu <songjun.wu@xxxxxxxxx>");
+MODULE_LICENSE("GPL");
diff --git a/sound/soc/atmel/atmel-classd.h b/sound/soc/atmel/atmel-classd.h
new file mode 100644
index 0000000..8b4e018
--- /dev/null
+++ b/sound/soc/atmel/atmel-classd.h
@@ -0,0 +1,120 @@
+#ifndef __ATMEL_CLASSD_H_
+#define __ATMEL_CLASSD_H_
+
+#define CLASSD_CR 0x00000000
+#define CLASSD_CR_RESET 0x1
+
+#define CLASSD_MR 0x00000004
+
+#define CLASSD_MR_LEN_DIS 0x0
+#define CLASSD_MR_LEN_EN 0x1
+#define CLASSD_MR_LEN_MASK (0x1 << 0)
+#define CLASSD_MR_LEN_SHIFT (0)
+
+#define CLASSD_MR_LMUTE_DIS 0x0
+#define CLASSD_MR_LMUTE_EN 0x1
+#define CLASSD_MR_LMUTE_SHIFT (0x1)
+#define CLASSD_MR_LMUTE_MASK (0x1 << 1)
+
+#define CLASSD_MR_REN_DIS 0x0
+#define CLASSD_MR_REN_EN 0x1
+#define CLASSD_MR_REN_MASK (0x1 << 4)
+#define CLASSD_MR_REN_SHIFT (4)
+
+#define CLASSD_MR_RMUTE_DIS 0x0
+#define CLASSD_MR_RMUTE_EN 0x1
+#define CLASSD_MR_RMUTE_SHIFT (0x5)
+#define CLASSD_MR_RMUTE_MASK (0x1 << 5)
+
+#define CLASSD_MR_PWMTYP_SINGLE 0x0
+#define CLASSD_MR_PWMTYP_DIFF 0x1
+#define CLASSD_MR_PWMTYP_MASK (0x1 << 8)
+#define CLASSD_MR_PWMTYP_SHIFT (8)
+
+#define CLASSD_MR_NON_OVERLAP_DIS 0x0
+#define CLASSD_MR_NON_OVERLAP_EN 0x1
+#define CLASSD_MR_NON_OVERLAP_MASK (0x1 << 16)
+#define CLASSD_MR_NON_OVERLAP_SHIFT (16)
+
+#define CLASSD_MR_NOVR_VAL_5NS 0x0
+#define CLASSD_MR_NOVR_VAL_10NS 0x1
+#define CLASSD_MR_NOVR_VAL_15NS 0x2
+#define CLASSD_MR_NOVR_VAL_20NS 0x3
+#define CLASSD_MR_NOVR_VAL_MASK (0x3 << 20)
+#define CLASSD_MR_NOVR_VAL_SHIFT (20)
+
+#define CLASSD_INTPMR 0x00000008
+
+#define CLASSD_INTPMR_ATTL_MASK (0x3f << 0)
+#define CLASSD_INTPMR_ATTL_SHIFT 0
+#define CLASSD_INTPMR_ATTR_MASK (0x3f << 8)
+#define CLASSD_INTPMR_ATTR_SHIFT 8
+
+#define CLASSD_INTPMR_DSP_CLK_FREQ_12M288 0x0
+#define CLASSD_INTPMR_DSP_CLK_FREQ_11M2896 0x1
+#define CLASSD_INTPMR_DSP_CLK_FREQ_MASK (0x1 << 16)
+#define CLASSD_INTPMR_DSP_CLK_FREQ_SHIFT (16)
+
+#define CLASSD_INTPMR_DEEMP_DIS 0x0
+#define CLASSD_INTPMR_DEEMP_EN 0x1
+#define CLASSD_INTPMR_DEEMP_MASK (0x1 << 18)
+#define CLASSD_INTPMR_DEEMP_SHIFT (18)
+
+#define CLASSD_INTPMR_SWAP_LEFT_ON_LSB 0x0
+#define CLASSD_INTPMR_SWAP_RIGHT_ON_LSB 0x1
+#define CLASSD_INTPMR_SWAP_MASK (0x1 << 19)
+#define CLASSD_INTPMR_SWAP_SHIFT (19)
+
+#define CLASSD_INTPMR_FRAME_8K 0x0
+#define CLASSD_INTPMR_FRAME_16K 0x1
+#define CLASSD_INTPMR_FRAME_32K 0x2
+#define CLASSD_INTPMR_FRAME_48K 0x3
+#define CLASSD_INTPMR_FRAME_96K 0x4
+#define CLASSD_INTPMR_FRAME_22K 0x5
+#define CLASSD_INTPMR_FRAME_44K 0x6
+#define CLASSD_INTPMR_FRAME_88K 0x7
+#define CLASSD_INTPMR_FRAME_MASK (0x7 << 20)
+#define CLASSD_INTPMR_FRAME_SHIFT (20)
+
+#define CLASSD_INTPMR_EQCFG_FLAT 0x0
+#define CLASSD_INTPMR_EQCFG_B_BOOST_12 0x1
+#define CLASSD_INTPMR_EQCFG_B_BOOST_6 0x2
+#define CLASSD_INTPMR_EQCFG_B_CUT_12 0x3
+#define CLASSD_INTPMR_EQCFG_B_CUT_6 0x4
+#define CLASSD_INTPMR_EQCFG_M_BOOST_3 0x5
+#define CLASSD_INTPMR_EQCFG_M_BOOST_8 0x6
+#define CLASSD_INTPMR_EQCFG_M_CUT_3 0x7
+#define CLASSD_INTPMR_EQCFG_M_CUT_8 0x8
+#define CLASSD_INTPMR_EQCFG_T_BOOST_12 0x9
+#define CLASSD_INTPMR_EQCFG_T_BOOST_6 0xa
+#define CLASSD_INTPMR_EQCFG_T_CUT_12 0xb
+#define CLASSD_INTPMR_EQCFG_T_CUT_6 0xc
+#define CLASSD_INTPMR_EQCFG_SHIFT (24)
+
+#define CLASSD_INTPMR_MONO_DIS 0x0
+#define CLASSD_INTPMR_MONO_EN 0x1
+#define CLASSD_INTPMR_MONO_MASK (0x1 << 28)
+#define CLASSD_INTPMR_MONO_SHIFT (28)
+
+#define CLASSD_INTPMR_MONO_MODE_MIX 0x0
+#define CLASSD_INTPMR_MONO_MODE_SAT 0x1
+#define CLASSD_INTPMR_MONO_MODE_LEFT 0x2
+#define CLASSD_INTPMR_MONO_MODE_RIGHT 0x3
+#define CLASSD_INTPMR_MONO_MODE_MASK (0x3 << 29)
+#define CLASSD_INTPMR_MONO_MODE_SHIFT (29)
+
+#define CLASSD_INTSR 0x0000000c
+
+#define CLASSD_THR 0x00000010
+
+#define CLASSD_IER 0x00000014
+
+#define CLASSD_IDR 0x00000018
+
+#define CLASSD_IMR 0x0000001c
+
+#define CLASSD_ISR 0x00000020
+
+#define CLASSD_WPMR 0x000000e4
+
+#endif
--
1.7.9.5
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