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authorDaniel Baumann <daniel.baumann@progress-linux.org>2024-04-07 18:49:45 +0000
committerDaniel Baumann <daniel.baumann@progress-linux.org>2024-04-07 18:49:45 +0000
commit2c3c1048746a4622d8c89a29670120dc8fab93c4 (patch)
tree848558de17fb3008cdf4d861b01ac7781903ce39 /sound/soc/atmel
parentInitial commit. (diff)
downloadlinux-2c3c1048746a4622d8c89a29670120dc8fab93c4.tar.xz
linux-2c3c1048746a4622d8c89a29670120dc8fab93c4.zip
Adding upstream version 6.1.76.upstream/6.1.76
Signed-off-by: Daniel Baumann <daniel.baumann@progress-linux.org>
Diffstat (limited to 'sound/soc/atmel')
-rw-r--r--sound/soc/atmel/Kconfig179
-rw-r--r--sound/soc/atmel/Makefile42
-rw-r--r--sound/soc/atmel/atmel-classd.c637
-rw-r--r--sound/soc/atmel/atmel-classd.h121
-rw-r--r--sound/soc/atmel/atmel-i2s.c744
-rw-r--r--sound/soc/atmel/atmel-pcm-dma.c120
-rw-r--r--sound/soc/atmel/atmel-pcm-pdc.c331
-rw-r--r--sound/soc/atmel/atmel-pcm.h91
-rw-r--r--sound/soc/atmel/atmel-pdmic.c713
-rw-r--r--sound/soc/atmel/atmel-pdmic.h81
-rw-r--r--sound/soc/atmel/atmel_ssc_dai.c920
-rw-r--r--sound/soc/atmel/atmel_ssc_dai.h111
-rw-r--r--sound/soc/atmel/atmel_wm8904.c201
-rw-r--r--sound/soc/atmel/mchp-i2s-mcc.c1112
-rw-r--r--sound/soc/atmel/mchp-pdmc.c1085
-rw-r--r--sound/soc/atmel/mchp-spdifrx.c1061
-rw-r--r--sound/soc/atmel/mchp-spdiftx.c859
-rw-r--r--sound/soc/atmel/mikroe-proto.c184
-rw-r--r--sound/soc/atmel/sam9g20_wm8731.c219
-rw-r--r--sound/soc/atmel/sam9x5_wm8731.c210
-rw-r--r--sound/soc/atmel/tse850-pcm5142.c446
21 files changed, 9467 insertions, 0 deletions
diff --git a/sound/soc/atmel/Kconfig b/sound/soc/atmel/Kconfig
new file mode 100644
index 000000000..5d59e00be
--- /dev/null
+++ b/sound/soc/atmel/Kconfig
@@ -0,0 +1,179 @@
+# SPDX-License-Identifier: GPL-2.0-only
+config SND_ATMEL_SOC
+ tristate "SoC Audio for the Atmel System-on-Chip"
+ depends on HAS_IOMEM
+ help
+ Say Y or M if you want to add support for codecs attached to
+ the ATMEL SSC interface. You will also need
+ to select the audio interfaces to support below.
+
+if SND_ATMEL_SOC
+
+config SND_ATMEL_SOC_PDC
+ bool
+
+config SND_ATMEL_SOC_DMA
+ bool
+ select SND_SOC_GENERIC_DMAENGINE_PCM
+
+config SND_ATMEL_SOC_SSC
+ tristate
+ select SND_ATMEL_SOC_DMA
+ select SND_ATMEL_SOC_PDC
+
+config SND_ATMEL_SOC_SSC_PDC
+ tristate "SoC PCM DAI support for AT91 SSC controller using PDC"
+ depends on ATMEL_SSC
+ select SND_ATMEL_SOC_PDC
+ select SND_ATMEL_SOC_SSC
+ help
+ Say Y or M if you want to add support for Atmel SSC interface
+ in PDC mode configured using audio-graph-card in device-tree.
+
+config SND_ATMEL_SOC_SSC_DMA
+ tristate "SoC PCM DAI support for AT91 SSC controller using DMA"
+ depends on ATMEL_SSC
+ select SND_ATMEL_SOC_DMA
+ select SND_ATMEL_SOC_SSC
+ help
+ Say Y or M if you want to add support for Atmel SSC interface
+ in DMA mode configured using audio-graph-card in device-tree.
+
+config SND_AT91_SOC_SAM9G20_WM8731
+ tristate "SoC Audio support for WM8731-based At91sam9g20 evaluation board"
+ depends on ARCH_AT91 || COMPILE_TEST
+ depends on ATMEL_SSC && I2C
+ select SND_ATMEL_SOC_SSC_PDC
+ select SND_SOC_WM8731_I2C
+ help
+ Say Y if you want to add support for SoC audio on WM8731-based
+ AT91sam9g20 evaluation board.
+
+config SND_ATMEL_SOC_WM8904
+ tristate "Atmel ASoC driver for boards using WM8904 codec"
+ depends on ARCH_AT91 || COMPILE_TEST
+ depends on ATMEL_SSC && I2C
+ select SND_ATMEL_SOC_SSC_DMA
+ select SND_SOC_WM8904
+ help
+ Say Y if you want to add support for Atmel ASoC driver for boards using
+ WM8904 codec.
+
+config SND_AT91_SOC_SAM9X5_WM8731
+ tristate "SoC Audio support for WM8731-based at91sam9x5 board"
+ depends on ARCH_AT91 || COMPILE_TEST
+ depends on ATMEL_SSC && SND_SOC_I2C_AND_SPI
+ select SND_ATMEL_SOC_SSC_DMA
+ select SND_SOC_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_SOC_GENERIC_DMAENGINE_PCM
+ select REGMAP_MMIO
+ help
+ Say Y if you want to add support for Atmel ASoC driver for boards using
+ CLASSD.
+
+config SND_ATMEL_SOC_PDMIC
+ tristate "Atmel ASoC driver for boards using PDMIC"
+ depends on OF && (ARCH_AT91 || COMPILE_TEST)
+ select SND_SOC_GENERIC_DMAENGINE_PCM
+ select REGMAP_MMIO
+ help
+ Say Y if you want to add support for Atmel ASoC driver for boards using
+ PDMIC.
+
+config SND_ATMEL_SOC_TSE850_PCM5142
+ tristate "ASoC driver for the Axentia TSE-850"
+ depends on ARCH_AT91 && OF
+ depends on ATMEL_SSC && I2C
+ select SND_ATMEL_SOC_SSC_DMA
+ select SND_SOC_PCM512x_I2C
+ help
+ Say Y if you want to add support for the ASoC driver for the
+ Axentia TSE-850 with a PCM5142 codec.
+
+config SND_ATMEL_SOC_I2S
+ tristate "Atmel ASoC driver for boards using I2S"
+ depends on OF && (ARCH_AT91 || COMPILE_TEST)
+ select SND_SOC_GENERIC_DMAENGINE_PCM
+ select REGMAP_MMIO
+ help
+ Say Y or M if you want to add support for Atmel ASoc driver for boards
+ using I2S.
+
+config SND_SOC_MIKROE_PROTO
+ tristate "Support for Mikroe-PROTO board"
+ depends on OF
+ depends on SND_SOC_I2C_AND_SPI
+ select SND_SOC_WM8731
+ help
+ Say Y or M if you want to add support for MikroElektronika PROTO Audio
+ Board. This board contains the WM8731 codec, which can be configured
+ using I2C over SDA (MPU Data Input) and SCL (MPU Clock Input) pins.
+ Both playback and capture are supported.
+
+config SND_MCHP_SOC_I2S_MCC
+ tristate "Microchip ASoC driver for boards using I2S MCC"
+ depends on OF && (ARCH_AT91 || COMPILE_TEST)
+ select SND_SOC_GENERIC_DMAENGINE_PCM
+ select REGMAP_MMIO
+ help
+ Say Y or M if you want to add support for I2S Multi-Channel ASoC
+ driver on the following Microchip platforms:
+ - sam9x60
+ - sama7g5
+
+ The I2SMCC complies with the Inter-IC Sound (I2S) bus specification
+ and supports a Time Division Multiplexed (TDM) interface with
+ external multi-channel audio codecs.
+ Starting with sama7g5, I2S and Left-Justified multi-channel is
+ supported by using multiple data pins, output and input, without TDM.
+
+config SND_MCHP_SOC_SPDIFTX
+ tristate "Microchip ASoC driver for boards using S/PDIF TX"
+ depends on OF && (ARCH_AT91 || COMPILE_TEST)
+ select SND_SOC_GENERIC_DMAENGINE_PCM
+ select REGMAP_MMIO
+ help
+ Say Y or M if you want to add support for Microchip S/PDIF TX ASoc
+ driver on the following Microchip platforms:
+ - sama7g5
+
+ This S/PDIF TX driver is compliant with IEC-60958 standard and
+ includes programmable User Data and Channel Status fields.
+
+config SND_MCHP_SOC_SPDIFRX
+ tristate "Microchip ASoC driver for boards using S/PDIF RX"
+ depends on OF && (ARCH_AT91 || COMPILE_TEST)
+ depends on COMMON_CLK
+ select SND_SOC_GENERIC_DMAENGINE_PCM
+ select REGMAP_MMIO
+ help
+ Say Y or M if you want to add support for Microchip S/PDIF RX ASoc
+ driver on the following Microchip platforms:
+ - sama7g5
+
+ This S/PDIF RX driver is compliant with IEC-60958 standard and
+ includes programmable User Data and Channel Status fields.
+
+config SND_MCHP_SOC_PDMC
+ tristate "Microchip ASoC driver for boards using PDMC"
+ depends on OF && (ARCH_AT91 || COMPILE_TEST)
+ select SND_SOC_GENERIC_DMAENGINE_PCM
+ select REGMAP_MMIO
+ help
+ Say Y or M if you want to add support for Microchip ASoC PDMC driver on the
+ following Microchip platforms:
+ - sama7g5
+
+ The Pulse Density Microphone Controller (PDMC) interfaces up to 4 digital
+ microphones PDM outputs. It generates a single clock line and samples 1 or
+ 2 data lines. The signal path includes an audio grade programmable
+ decimation filter and outputs 24-bit audio words.
+
+endif
diff --git a/sound/soc/atmel/Makefile b/sound/soc/atmel/Makefile
new file mode 100644
index 000000000..043097a08
--- /dev/null
+++ b/sound/soc/atmel/Makefile
@@ -0,0 +1,42 @@
+# SPDX-License-Identifier: GPL-2.0
+# AT91 Platform Support
+snd-soc-atmel-pcm-pdc-objs := atmel-pcm-pdc.o
+snd-soc-atmel-pcm-dma-objs := atmel-pcm-dma.o
+snd-soc-atmel_ssc_dai-objs := atmel_ssc_dai.o
+snd-soc-atmel-i2s-objs := atmel-i2s.o
+snd-soc-mchp-i2s-mcc-objs := mchp-i2s-mcc.o
+snd-soc-mchp-spdiftx-objs := mchp-spdiftx.o
+snd-soc-mchp-spdifrx-objs := mchp-spdifrx.o
+snd-soc-mchp-pdmc-objs := mchp-pdmc.o
+
+# pdc and dma need to both be built-in if any user of
+# ssc is built-in.
+ifdef CONFIG_SND_ATMEL_SOC_PDC
+obj-$(CONFIG_SND_ATMEL_SOC_SSC) += snd-soc-atmel-pcm-pdc.o
+endif
+ifdef CONFIG_SND_ATMEL_SOC_DMA
+obj-$(CONFIG_SND_ATMEL_SOC_SSC) += snd-soc-atmel-pcm-dma.o
+endif
+obj-$(CONFIG_SND_ATMEL_SOC_SSC) += snd-soc-atmel_ssc_dai.o
+obj-$(CONFIG_SND_ATMEL_SOC_I2S) += snd-soc-atmel-i2s.o
+obj-$(CONFIG_SND_MCHP_SOC_I2S_MCC) += snd-soc-mchp-i2s-mcc.o
+obj-$(CONFIG_SND_MCHP_SOC_SPDIFTX) += snd-soc-mchp-spdiftx.o
+obj-$(CONFIG_SND_MCHP_SOC_SPDIFRX) += snd-soc-mchp-spdifrx.o
+obj-$(CONFIG_SND_MCHP_SOC_PDMC) += snd-soc-mchp-pdmc.o
+
+# AT91 Machine Support
+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
+snd-atmel-soc-pdmic-objs := atmel-pdmic.o
+snd-atmel-soc-tse850-pcm5142-objs := tse850-pcm5142.o
+snd-soc-mikroe-proto-objs := mikroe-proto.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
+obj-$(CONFIG_SND_ATMEL_SOC_PDMIC) += snd-atmel-soc-pdmic.o
+obj-$(CONFIG_SND_ATMEL_SOC_TSE850_PCM5142) += snd-atmel-soc-tse850-pcm5142.o
+obj-$(CONFIG_SND_SOC_MIKROE_PROTO) += snd-soc-mikroe-proto.o
diff --git a/sound/soc/atmel/atmel-classd.c b/sound/soc/atmel/atmel-classd.c
new file mode 100644
index 000000000..87d6d6ed0
--- /dev/null
+++ b/sound/soc/atmel/atmel-classd.c
@@ -0,0 +1,637 @@
+// SPDX-License-Identifier: GPL-2.0-or-later
+/* Atmel ALSA SoC Audio Class D Amplifier (CLASSD) driver
+ *
+ * Copyright (C) 2015 Atmel
+ *
+ * Author: Songjun Wu <songjun.wu@atmel.com>
+ */
+
+#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;
+ const char *card_name;
+};
+
+struct atmel_classd {
+ dma_addr_t phy_base;
+ struct regmap *regmap;
+ struct clk *pclk;
+ struct clk *gclk;
+ struct device *dev;
+ 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_s;
+ 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_s);
+ if ((ret == 0) && (strcmp(pwm_type_s, "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)
+ pdata->non_overlap_enable = false;
+ else
+ pdata->non_overlap_enable = true;
+
+ ret = of_property_read_string(np, "atmel,model", &pdata->card_name);
+ if (ret)
+ pdata->card_name = "CLASSD";
+
+ 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 = 1,
+ .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 snd_soc_pcm_runtime *rtd = asoc_substream_to_rtd(substream);
+ struct atmel_classd *dd = snd_soc_card_get_drvdata(rtd->card);
+ int err;
+
+ regmap_write(dd->regmap, CLASSD_THR, 0x0);
+
+ err = clk_prepare_enable(dd->pclk);
+ if (err)
+ return err;
+ err = clk_prepare_enable(dd->gclk);
+ if (err) {
+ clk_disable_unprepare(dd->pclk);
+ return err;
+ }
+ return 0;
+}
+
+/* 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 = asoc_substream_to_rtd(substream);
+ struct atmel_classd *dd = snd_soc_card_get_drvdata(rtd->card);
+
+ if (params_physical_width(params) != 16) {
+ dev_err(dd->dev,
+ "only supports 16-bit audio data\n");
+ return -EINVAL;
+ }
+
+ if (params_channels(params) == 1)
+ slave_config->dst_addr_width = DMA_SLAVE_BUSWIDTH_2_BYTES;
+ else
+ slave_config->dst_addr_width = DMA_SLAVE_BUSWIDTH_4_BYTES;
+
+ slave_config->direction = DMA_MEM_TO_DEV;
+ slave_config->dst_addr = dd->phy_base + CLASSD_THR;
+ 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 */
+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 eqcfg_text[] = {
+ "Treble-12dB", "Treble-6dB",
+ "Medium-8dB", "Medium-3dB",
+ "Bass-12dB", "Bass-6dB",
+ "0 dB",
+ "Bass+6dB", "Bass+12dB",
+ "Medium+3dB", "Medium+8dB",
+ "Treble+6dB", "Treble+12dB",
+};
+
+static const unsigned int eqcfg_value[] = {
+ CLASSD_INTPMR_EQCFG_T_CUT_12, CLASSD_INTPMR_EQCFG_T_CUT_6,
+ CLASSD_INTPMR_EQCFG_M_CUT_8, CLASSD_INTPMR_EQCFG_M_CUT_3,
+ 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,
+ CLASSD_INTPMR_EQCFG_M_BOOST_3, CLASSD_INTPMR_EQCFG_M_BOOST_8,
+ CLASSD_INTPMR_EQCFG_T_BOOST_6, CLASSD_INTPMR_EQCFG_T_BOOST_12,
+};
+
+static SOC_VALUE_ENUM_SINGLE_DECL(classd_eqcfg_enum,
+ CLASSD_INTPMR, CLASSD_INTPMR_EQCFG_SHIFT, 0xf,
+ eqcfg_text, eqcfg_value);
+
+static const DECLARE_TLV_DB_SCALE(classd_digital_tlv, -7800, 100, 1);
+
+static const struct snd_kcontrol_new atmel_classd_snd_controls[] = {
+SOC_DOUBLE_TLV("Playback Volume", CLASSD_INTPMR,
+ CLASSD_INTPMR_ATTL_SHIFT, CLASSD_INTPMR_ATTR_SHIFT,
+ 78, 1, classd_digital_tlv),
+
+SOC_SINGLE("Deemphasis Switch", CLASSD_INTPMR,
+ CLASSD_INTPMR_DEEMP_SHIFT, 1, 0),
+
+SOC_SINGLE("Mono Switch", CLASSD_INTPMR, CLASSD_INTPMR_MONO_SHIFT, 1, 0),
+
+SOC_SINGLE("Swap Switch", CLASSD_INTPMR, CLASSD_INTPMR_SWAP_SHIFT, 1, 0),
+
+SOC_ENUM("Mono Mode", classd_mono_mode_enum),
+
+SOC_ENUM("EQ", classd_eqcfg_enum),
+};
+
+static const char * const pwm_type[] = {
+ "Single ended", "Differential"
+};
+
+static int atmel_classd_component_probe(struct snd_soc_component *component)
+{
+ struct snd_soc_card *card = snd_soc_component_get_drvdata(component);
+ struct atmel_classd *dd = snd_soc_card_get_drvdata(card);
+ 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);
+ dev_warn(component->dev,
+ "non-overlapping value %d is invalid, the default value 10 is specified\n",
+ pdata->non_overlap_time);
+ break;
+ }
+ }
+
+ snd_soc_component_update_bits(component, CLASSD_MR, mask, val);
+
+ dev_info(component->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 int atmel_classd_component_resume(struct snd_soc_component *component)
+{
+ struct snd_soc_card *card = snd_soc_component_get_drvdata(component);
+ struct atmel_classd *dd = snd_soc_card_get_drvdata(card);
+
+ return regcache_sync(dd->regmap);
+}
+
+static int atmel_classd_cpu_dai_mute_stream(struct snd_soc_dai *cpu_dai,
+ int mute, int direction)
+{
+ struct snd_soc_component *component = cpu_dai->component;
+ u32 mask, val;
+
+ mask = CLASSD_MR_LMUTE_MASK | CLASSD_MR_RMUTE_MASK;
+
+ if (mute)
+ val = mask;
+ else
+ val = 0;
+
+ snd_soc_component_update_bits(component, CLASSD_MR, mask, val);
+
+ return 0;
+}
+
+#define CLASSD_GCLK_RATE_11M2896_MPY_8 (112896 * 100 * 8)
+#define CLASSD_GCLK_RATE_12M288_MPY_8 (12288 * 1000 * 8)
+
+static struct {
+ int rate;
+ int sample_rate;
+ int dsp_clk;
+ unsigned long gclk_rate;
+} const sample_rates[] = {
+ { 8000, CLASSD_INTPMR_FRAME_8K,
+ CLASSD_INTPMR_DSP_CLK_FREQ_12M288, CLASSD_GCLK_RATE_12M288_MPY_8 },
+ { 16000, CLASSD_INTPMR_FRAME_16K,
+ CLASSD_INTPMR_DSP_CLK_FREQ_12M288, CLASSD_GCLK_RATE_12M288_MPY_8 },
+ { 32000, CLASSD_INTPMR_FRAME_32K,
+ CLASSD_INTPMR_DSP_CLK_FREQ_12M288, CLASSD_GCLK_RATE_12M288_MPY_8 },
+ { 48000, CLASSD_INTPMR_FRAME_48K,
+ CLASSD_INTPMR_DSP_CLK_FREQ_12M288, CLASSD_GCLK_RATE_12M288_MPY_8 },
+ { 96000, CLASSD_INTPMR_FRAME_96K,
+ CLASSD_INTPMR_DSP_CLK_FREQ_12M288, CLASSD_GCLK_RATE_12M288_MPY_8 },
+ { 22050, CLASSD_INTPMR_FRAME_22K,
+ CLASSD_INTPMR_DSP_CLK_FREQ_11M2896, CLASSD_GCLK_RATE_11M2896_MPY_8 },
+ { 44100, CLASSD_INTPMR_FRAME_44K,
+ CLASSD_INTPMR_DSP_CLK_FREQ_11M2896, CLASSD_GCLK_RATE_11M2896_MPY_8 },
+ { 88200, CLASSD_INTPMR_FRAME_88K,
+ CLASSD_INTPMR_DSP_CLK_FREQ_11M2896, CLASSD_GCLK_RATE_11M2896_MPY_8 },
+};
+
+static int
+atmel_classd_cpu_dai_hw_params(struct snd_pcm_substream *substream,
+ struct snd_pcm_hw_params *params,
+ struct snd_soc_dai *cpu_dai)
+{
+ struct snd_soc_pcm_runtime *rtd = asoc_substream_to_rtd(substream);
+ struct atmel_classd *dd = snd_soc_card_get_drvdata(rtd->card);
+ struct snd_soc_component *component = cpu_dai->component;
+ 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(component->dev,
+ "Selected SAMPLE_RATE of %dHz, GCLK_RATE of %ldHz\n",
+ sample_rates[best].rate, sample_rates[best].gclk_rate);
+
+ clk_disable_unprepare(dd->gclk);
+
+ ret = clk_set_rate(dd->gclk, sample_rates[best].gclk_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_component_update_bits(component, CLASSD_INTPMR, mask, val);
+
+ return clk_prepare_enable(dd->gclk);
+}
+
+static void
+atmel_classd_cpu_dai_shutdown(struct snd_pcm_substream *substream,
+ struct snd_soc_dai *cpu_dai)
+{
+ struct snd_soc_pcm_runtime *rtd = asoc_substream_to_rtd(substream);
+ struct atmel_classd *dd = snd_soc_card_get_drvdata(rtd->card);
+
+ clk_disable_unprepare(dd->gclk);
+}
+
+static int atmel_classd_cpu_dai_prepare(struct snd_pcm_substream *substream,
+ struct snd_soc_dai *cpu_dai)
+{
+ struct snd_soc_component *component = cpu_dai->component;
+
+ snd_soc_component_update_bits(component, 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_cpu_dai_trigger(struct snd_pcm_substream *substream,
+ int cmd, struct snd_soc_dai *cpu_dai)
+{
+ struct snd_soc_component *component = cpu_dai->component;
+ 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_component_update_bits(component, CLASSD_MR, mask, val);
+
+ return 0;
+}
+
+static const struct snd_soc_dai_ops atmel_classd_cpu_dai_ops = {
+ .startup = atmel_classd_cpu_dai_startup,
+ .shutdown = atmel_classd_cpu_dai_shutdown,
+ .mute_stream = atmel_classd_cpu_dai_mute_stream,
+ .hw_params = atmel_classd_cpu_dai_hw_params,
+ .prepare = atmel_classd_cpu_dai_prepare,
+ .trigger = atmel_classd_cpu_dai_trigger,
+ .no_capture_mute = 1,
+};
+
+static struct snd_soc_dai_driver atmel_classd_cpu_dai = {
+ .playback = {
+ .stream_name = "Playback",
+ .channels_min = 1,
+ .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",
+ .probe = atmel_classd_component_probe,
+ .resume = atmel_classd_component_resume,
+ .controls = atmel_classd_snd_controls,
+ .num_controls = ARRAY_SIZE(atmel_classd_snd_controls),
+ .idle_bias_on = 1,
+ .use_pmdown_time = 1,
+ .legacy_dai_naming = 1,
+};
+
+/* ASoC sound card */
+static int atmel_classd_asoc_card_init(struct device *dev,
+ struct snd_soc_card *card)
+{
+ struct snd_soc_dai_link *dai_link;
+ struct atmel_classd *dd = snd_soc_card_get_drvdata(card);
+ struct snd_soc_dai_link_component *comp;
+
+ dai_link = devm_kzalloc(dev, sizeof(*dai_link), GFP_KERNEL);
+ if (!dai_link)
+ return -ENOMEM;
+
+ comp = devm_kzalloc(dev, 3 * sizeof(*comp), GFP_KERNEL);
+ if (!comp)
+ return -ENOMEM;
+
+ dai_link->cpus = &comp[0];
+ dai_link->codecs = &comp[1];
+ dai_link->platforms = &comp[2];
+
+ dai_link->num_cpus = 1;
+ dai_link->num_codecs = 1;
+ dai_link->num_platforms = 1;
+
+ dai_link->name = "CLASSD";
+ dai_link->stream_name = "CLASSD PCM";
+ dai_link->codecs->dai_name = "snd-soc-dummy-dai";
+ dai_link->cpus->dai_name = dev_name(dev);
+ dai_link->codecs->name = "snd-soc-dummy";
+ dai_link->platforms->name = dev_name(dev);
+
+ card->dai_link = dai_link;
+ card->num_links = 1;
+ card->name = dd->pdata->card_name;
+ card->dev = dev;
+
+ return 0;
+};
+
+/* regmap configuration */
+static const struct reg_default atmel_classd_reg_defaults[] = {
+ { CLASSD_INTPMR, 0x00301212 },
+};
+
+#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;
+ struct snd_soc_card *card;
+ 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(dev, sizeof(*dd), GFP_KERNEL);
+ if (!dd)
+ return -ENOMEM;
+
+ dd->pdata = pdata;
+
+ dd->irq = platform_get_irq(pdev, 0);
+ if (dd->irq < 0)
+ return dd->irq;
+
+ 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->gclk)) {
+ ret = PTR_ERR(dd->gclk);
+ dev_err(dev, "failed to get GCK clock: %d\n", ret);
+ return ret;
+ }
+
+ io_base = devm_platform_get_and_ioremap_resource(pdev, 0, &res);
+ if (IS_ERR(io_base))
+ return PTR_ERR(io_base);
+
+ dd->phy_base = res->start;
+ dd->dev = dev;
+
+ 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(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(dev,
+ &atmel_classd_dmaengine_pcm_config,
+ 0);
+ if (ret) {
+ dev_err(dev, "could not register platform: %d\n", ret);
+ return ret;
+ }
+
+ /* register sound card */
+ card = devm_kzalloc(dev, sizeof(*card), GFP_KERNEL);
+ if (!card) {
+ ret = -ENOMEM;
+ goto unregister_codec;
+ }
+
+ snd_soc_card_set_drvdata(card, dd);
+
+ ret = atmel_classd_asoc_card_init(dev, card);
+ if (ret) {
+ dev_err(dev, "failed to init sound card\n");
+ goto unregister_codec;
+ }
+
+ ret = devm_snd_soc_register_card(dev, card);
+ if (ret) {
+ dev_err(dev, "failed to register sound card: %d\n", ret);
+ goto unregister_codec;
+ }
+
+ return 0;
+
+unregister_codec:
+ return ret;
+}
+
+static int atmel_classd_remove(struct platform_device *pdev)
+{
+ return 0;
+}
+
+static struct platform_driver atmel_classd_driver = {
+ .driver = {
+ .name = "atmel-classd",
+ .of_match_table = of_match_ptr(atmel_classd_of_match),
+ .pm = &snd_soc_pm_ops,
+ },
+ .probe = atmel_classd_probe,
+ .remove = atmel_classd_remove,
+};
+module_platform_driver(atmel_classd_driver);
+
+MODULE_DESCRIPTION("Atmel ClassD driver under ALSA SoC architecture");
+MODULE_AUTHOR("Songjun Wu <songjun.wu@atmel.com>");
+MODULE_LICENSE("GPL");
diff --git a/sound/soc/atmel/atmel-classd.h b/sound/soc/atmel/atmel-classd.h
new file mode 100644
index 000000000..0f2e25aeb
--- /dev/null
+++ b/sound/soc/atmel/atmel-classd.h
@@ -0,0 +1,121 @@
+/* SPDX-License-Identifier: GPL-2.0 */
+#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
diff --git a/sound/soc/atmel/atmel-i2s.c b/sound/soc/atmel/atmel-i2s.c
new file mode 100644
index 000000000..5e43ff0b5
--- /dev/null
+++ b/sound/soc/atmel/atmel-i2s.c
@@ -0,0 +1,744 @@
+// SPDX-License-Identifier: GPL-2.0-only
+/*
+ * Driver for Atmel I2S controller
+ *
+ * Copyright (C) 2015 Atmel Corporation
+ *
+ * Author: Cyrille Pitchen <cyrille.pitchen@atmel.com>
+ */
+
+#include <linux/init.h>
+#include <linux/module.h>
+#include <linux/device.h>
+#include <linux/slab.h>
+#include <linux/delay.h>
+#include <linux/io.h>
+#include <linux/clk.h>
+#include <linux/mfd/syscon.h>
+
+#include <sound/core.h>
+#include <sound/pcm.h>
+#include <sound/pcm_params.h>
+#include <sound/initval.h>
+#include <sound/soc.h>
+#include <sound/dmaengine_pcm.h>
+
+#define ATMEL_I2SC_MAX_TDM_CHANNELS 8
+
+/*
+ * ---- I2S Controller Register map ----
+ */
+#define ATMEL_I2SC_CR 0x0000 /* Control Register */
+#define ATMEL_I2SC_MR 0x0004 /* Mode Register */
+#define ATMEL_I2SC_SR 0x0008 /* Status Register */
+#define ATMEL_I2SC_SCR 0x000c /* Status Clear Register */
+#define ATMEL_I2SC_SSR 0x0010 /* Status Set Register */
+#define ATMEL_I2SC_IER 0x0014 /* Interrupt Enable Register */
+#define ATMEL_I2SC_IDR 0x0018 /* Interrupt Disable Register */
+#define ATMEL_I2SC_IMR 0x001c /* Interrupt Mask Register */
+#define ATMEL_I2SC_RHR 0x0020 /* Receiver Holding Register */
+#define ATMEL_I2SC_THR 0x0024 /* Transmitter Holding Register */
+#define ATMEL_I2SC_VERSION 0x0028 /* Version Register */
+
+/*
+ * ---- Control Register (Write-only) ----
+ */
+#define ATMEL_I2SC_CR_RXEN BIT(0) /* Receiver Enable */
+#define ATMEL_I2SC_CR_RXDIS BIT(1) /* Receiver Disable */
+#define ATMEL_I2SC_CR_CKEN BIT(2) /* Clock Enable */
+#define ATMEL_I2SC_CR_CKDIS BIT(3) /* Clock Disable */
+#define ATMEL_I2SC_CR_TXEN BIT(4) /* Transmitter Enable */
+#define ATMEL_I2SC_CR_TXDIS BIT(5) /* Transmitter Disable */
+#define ATMEL_I2SC_CR_SWRST BIT(7) /* Software Reset */
+
+/*
+ * ---- Mode Register (Read/Write) ----
+ */
+#define ATMEL_I2SC_MR_MODE_MASK GENMASK(0, 0)
+#define ATMEL_I2SC_MR_MODE_SLAVE (0 << 0)
+#define ATMEL_I2SC_MR_MODE_MASTER (1 << 0)
+
+#define ATMEL_I2SC_MR_DATALENGTH_MASK GENMASK(4, 2)
+#define ATMEL_I2SC_MR_DATALENGTH_32_BITS (0 << 2)
+#define ATMEL_I2SC_MR_DATALENGTH_24_BITS (1 << 2)
+#define ATMEL_I2SC_MR_DATALENGTH_20_BITS (2 << 2)
+#define ATMEL_I2SC_MR_DATALENGTH_18_BITS (3 << 2)
+#define ATMEL_I2SC_MR_DATALENGTH_16_BITS (4 << 2)
+#define ATMEL_I2SC_MR_DATALENGTH_16_BITS_COMPACT (5 << 2)
+#define ATMEL_I2SC_MR_DATALENGTH_8_BITS (6 << 2)
+#define ATMEL_I2SC_MR_DATALENGTH_8_BITS_COMPACT (7 << 2)
+
+#define ATMEL_I2SC_MR_FORMAT_MASK GENMASK(7, 6)
+#define ATMEL_I2SC_MR_FORMAT_I2S (0 << 6)
+#define ATMEL_I2SC_MR_FORMAT_LJ (1 << 6) /* Left Justified */
+#define ATMEL_I2SC_MR_FORMAT_TDM (2 << 6)
+#define ATMEL_I2SC_MR_FORMAT_TDMLJ (3 << 6)
+
+/* Left audio samples duplicated to right audio channel */
+#define ATMEL_I2SC_MR_RXMONO BIT(8)
+
+/* Receiver uses one DMA channel ... */
+#define ATMEL_I2SC_MR_RXDMA_MASK GENMASK(9, 9)
+#define ATMEL_I2SC_MR_RXDMA_SINGLE (0 << 9) /* for all audio channels */
+#define ATMEL_I2SC_MR_RXDMA_MULTIPLE (1 << 9) /* per audio channel */
+
+/* I2SDO output of I2SC is internally connected to I2SDI input */
+#define ATMEL_I2SC_MR_RXLOOP BIT(10)
+
+/* Left audio samples duplicated to right audio channel */
+#define ATMEL_I2SC_MR_TXMONO BIT(12)
+
+/* Transmitter uses one DMA channel ... */
+#define ATMEL_I2SC_MR_TXDMA_MASK GENMASK(13, 13)
+#define ATMEL_I2SC_MR_TXDMA_SINGLE (0 << 13) /* for all audio channels */
+#define ATMEL_I2SC_MR_TXDME_MULTIPLE (1 << 13) /* per audio channel */
+
+/* x sample transmitted when underrun */
+#define ATMEL_I2SC_MR_TXSAME_MASK GENMASK(14, 14)
+#define ATMEL_I2SC_MR_TXSAME_ZERO (0 << 14) /* Zero sample */
+#define ATMEL_I2SC_MR_TXSAME_PREVIOUS (1 << 14) /* Previous sample */
+
+/* Audio Clock to I2SC Master Clock ratio */
+#define ATMEL_I2SC_MR_IMCKDIV_MASK GENMASK(21, 16)
+#define ATMEL_I2SC_MR_IMCKDIV(div) \
+ (((div) << 16) & ATMEL_I2SC_MR_IMCKDIV_MASK)
+
+/* Master Clock to fs ratio */
+#define ATMEL_I2SC_MR_IMCKFS_MASK GENMASK(29, 24)
+#define ATMEL_I2SC_MR_IMCKFS(fs) \
+ (((fs) << 24) & ATMEL_I2SC_MR_IMCKFS_MASK)
+
+/* Master Clock mode */
+#define ATMEL_I2SC_MR_IMCKMODE_MASK GENMASK(30, 30)
+/* 0: No master clock generated (selected clock drives I2SCK pin) */
+#define ATMEL_I2SC_MR_IMCKMODE_I2SCK (0 << 30)
+/* 1: master clock generated (internally generated clock drives I2SMCK pin) */
+#define ATMEL_I2SC_MR_IMCKMODE_I2SMCK (1 << 30)
+
+/* Slot Width */
+/* 0: slot is 32 bits wide for DATALENGTH = 18/20/24 bits. */
+/* 1: slot is 24 bits wide for DATALENGTH = 18/20/24 bits. */
+#define ATMEL_I2SC_MR_IWS BIT(31)
+
+/*
+ * ---- Status Registers ----
+ */
+#define ATMEL_I2SC_SR_RXEN BIT(0) /* Receiver Enabled */
+#define ATMEL_I2SC_SR_RXRDY BIT(1) /* Receive Ready */
+#define ATMEL_I2SC_SR_RXOR BIT(2) /* Receive Overrun */
+
+#define ATMEL_I2SC_SR_TXEN BIT(4) /* Transmitter Enabled */
+#define ATMEL_I2SC_SR_TXRDY BIT(5) /* Transmit Ready */
+#define ATMEL_I2SC_SR_TXUR BIT(6) /* Transmit Underrun */
+
+/* Receive Overrun Channel */
+#define ATMEL_I2SC_SR_RXORCH_MASK GENMASK(15, 8)
+#define ATMEL_I2SC_SR_RXORCH(ch) (1 << (((ch) & 0x7) + 8))
+
+/* Transmit Underrun Channel */
+#define ATMEL_I2SC_SR_TXURCH_MASK GENMASK(27, 20)
+#define ATMEL_I2SC_SR_TXURCH(ch) (1 << (((ch) & 0x7) + 20))
+
+/*
+ * ---- Interrupt Enable/Disable/Mask Registers ----
+ */
+#define ATMEL_I2SC_INT_RXRDY ATMEL_I2SC_SR_RXRDY
+#define ATMEL_I2SC_INT_RXOR ATMEL_I2SC_SR_RXOR
+#define ATMEL_I2SC_INT_TXRDY ATMEL_I2SC_SR_TXRDY
+#define ATMEL_I2SC_INT_TXUR ATMEL_I2SC_SR_TXUR
+
+static const struct regmap_config atmel_i2s_regmap_config = {
+ .reg_bits = 32,
+ .reg_stride = 4,
+ .val_bits = 32,
+ .max_register = ATMEL_I2SC_VERSION,
+};
+
+struct atmel_i2s_gck_param {
+ int fs;
+ unsigned long mck;
+ int imckdiv;
+ int imckfs;
+};
+
+#define I2S_MCK_12M288 12288000UL
+#define I2S_MCK_11M2896 11289600UL
+#define I2S_MCK_6M144 6144000UL
+
+/* mck = (32 * (imckfs+1) / (imckdiv+1)) * fs */
+static const struct atmel_i2s_gck_param gck_params[] = {
+ /* mck = 6.144Mhz */
+ { 8000, I2S_MCK_6M144, 1, 47}, /* mck = 768 fs */
+
+ /* mck = 12.288MHz */
+ { 16000, I2S_MCK_12M288, 1, 47}, /* mck = 768 fs */
+ { 24000, I2S_MCK_12M288, 3, 63}, /* mck = 512 fs */
+ { 32000, I2S_MCK_12M288, 3, 47}, /* mck = 384 fs */
+ { 48000, I2S_MCK_12M288, 7, 63}, /* mck = 256 fs */
+ { 64000, I2S_MCK_12M288, 7, 47}, /* mck = 192 fs */
+ { 96000, I2S_MCK_12M288, 7, 31}, /* mck = 128 fs */
+ {192000, I2S_MCK_12M288, 7, 15}, /* mck = 64 fs */
+
+ /* mck = 11.2896MHz */
+ { 11025, I2S_MCK_11M2896, 1, 63}, /* mck = 1024 fs */
+ { 22050, I2S_MCK_11M2896, 3, 63}, /* mck = 512 fs */
+ { 44100, I2S_MCK_11M2896, 7, 63}, /* mck = 256 fs */
+ { 88200, I2S_MCK_11M2896, 7, 31}, /* mck = 128 fs */
+ {176400, I2S_MCK_11M2896, 7, 15}, /* mck = 64 fs */
+};
+
+struct atmel_i2s_dev;
+
+struct atmel_i2s_caps {
+ int (*mck_init)(struct atmel_i2s_dev *, struct device_node *np);
+};
+
+struct atmel_i2s_dev {
+ struct device *dev;
+ struct regmap *regmap;
+ struct clk *pclk;
+ struct clk *gclk;
+ struct snd_dmaengine_dai_dma_data playback;
+ struct snd_dmaengine_dai_dma_data capture;
+ unsigned int fmt;
+ const struct atmel_i2s_gck_param *gck_param;
+ const struct atmel_i2s_caps *caps;
+ int clk_use_no;
+};
+
+static irqreturn_t atmel_i2s_interrupt(int irq, void *dev_id)
+{
+ struct atmel_i2s_dev *dev = dev_id;
+ unsigned int sr, imr, pending, ch, mask;
+ irqreturn_t ret = IRQ_NONE;
+
+ regmap_read(dev->regmap, ATMEL_I2SC_SR, &sr);
+ regmap_read(dev->regmap, ATMEL_I2SC_IMR, &imr);
+ pending = sr & imr;
+
+ if (!pending)
+ return IRQ_NONE;
+
+ if (pending & ATMEL_I2SC_INT_RXOR) {
+ mask = ATMEL_I2SC_SR_RXOR;
+
+ for (ch = 0; ch < ATMEL_I2SC_MAX_TDM_CHANNELS; ++ch) {
+ if (sr & ATMEL_I2SC_SR_RXORCH(ch)) {
+ mask |= ATMEL_I2SC_SR_RXORCH(ch);
+ dev_err(dev->dev,
+ "RX overrun on channel %d\n", ch);
+ }
+ }
+ regmap_write(dev->regmap, ATMEL_I2SC_SCR, mask);
+ ret = IRQ_HANDLED;
+ }
+
+ if (pending & ATMEL_I2SC_INT_TXUR) {
+ mask = ATMEL_I2SC_SR_TXUR;
+
+ for (ch = 0; ch < ATMEL_I2SC_MAX_TDM_CHANNELS; ++ch) {
+ if (sr & ATMEL_I2SC_SR_TXURCH(ch)) {
+ mask |= ATMEL_I2SC_SR_TXURCH(ch);
+ dev_err(dev->dev,
+ "TX underrun on channel %d\n", ch);
+ }
+ }
+ regmap_write(dev->regmap, ATMEL_I2SC_SCR, mask);
+ ret = IRQ_HANDLED;
+ }
+
+ return ret;
+}
+
+#define ATMEL_I2S_RATES SNDRV_PCM_RATE_8000_192000
+
+#define ATMEL_I2S_FORMATS (SNDRV_PCM_FMTBIT_S8 | \
+ SNDRV_PCM_FMTBIT_S16_LE | \
+ SNDRV_PCM_FMTBIT_S18_3LE | \
+ SNDRV_PCM_FMTBIT_S20_3LE | \
+ SNDRV_PCM_FMTBIT_S24_3LE | \
+ SNDRV_PCM_FMTBIT_S24_LE | \
+ SNDRV_PCM_FMTBIT_S32_LE)
+
+static int atmel_i2s_set_dai_fmt(struct snd_soc_dai *dai, unsigned int fmt)
+{
+ struct atmel_i2s_dev *dev = snd_soc_dai_get_drvdata(dai);
+
+ dev->fmt = fmt;
+ return 0;
+}
+
+static int atmel_i2s_prepare(struct snd_pcm_substream *substream,
+ struct snd_soc_dai *dai)
+{
+ struct atmel_i2s_dev *dev = snd_soc_dai_get_drvdata(dai);
+ bool is_playback = (substream->stream == SNDRV_PCM_STREAM_PLAYBACK);
+ unsigned int rhr, sr = 0;
+
+ if (is_playback) {
+ regmap_read(dev->regmap, ATMEL_I2SC_SR, &sr);
+ if (sr & ATMEL_I2SC_SR_RXRDY) {
+ /*
+ * The RX Ready flag should not be set. However if here,
+ * we flush (read) the Receive Holding Register to start
+ * from a clean state.
+ */
+ dev_dbg(dev->dev, "RXRDY is set\n");
+ regmap_read(dev->regmap, ATMEL_I2SC_RHR, &rhr);
+ }
+ }
+
+ return 0;
+}
+
+static int atmel_i2s_get_gck_param(struct atmel_i2s_dev *dev, int fs)
+{
+ int i, best;
+
+ if (!dev->gclk) {
+ dev_err(dev->dev, "cannot generate the I2S Master Clock\n");
+ return -EINVAL;
+ }
+
+ /*
+ * Find the best possible settings to generate the I2S Master Clock
+ * from the PLL Audio.
+ */
+ dev->gck_param = NULL;
+ best = INT_MAX;
+ for (i = 0; i < ARRAY_SIZE(gck_params); ++i) {
+ const struct atmel_i2s_gck_param *gck_param = &gck_params[i];
+ int val = abs(fs - gck_param->fs);
+
+ if (val < best) {
+ best = val;
+ dev->gck_param = gck_param;
+ }
+ }
+
+ return 0;
+}
+
+static int atmel_i2s_hw_params(struct snd_pcm_substream *substream,
+ struct snd_pcm_hw_params *params,
+ struct snd_soc_dai *dai)
+{
+ struct atmel_i2s_dev *dev = snd_soc_dai_get_drvdata(dai);
+ bool is_playback = (substream->stream == SNDRV_PCM_STREAM_PLAYBACK);
+ unsigned int mr = 0, mr_mask;
+ int ret;
+
+ mr_mask = ATMEL_I2SC_MR_FORMAT_MASK | ATMEL_I2SC_MR_MODE_MASK |
+ ATMEL_I2SC_MR_DATALENGTH_MASK;
+ if (is_playback)
+ mr_mask |= ATMEL_I2SC_MR_TXMONO;
+ else
+ mr_mask |= ATMEL_I2SC_MR_RXMONO;
+
+ switch (dev->fmt & SND_SOC_DAIFMT_FORMAT_MASK) {
+ case SND_SOC_DAIFMT_I2S:
+ mr |= ATMEL_I2SC_MR_FORMAT_I2S;
+ break;
+
+ default:
+ dev_err(dev->dev, "unsupported bus format\n");
+ return -EINVAL;
+ }
+
+ switch (dev->fmt & SND_SOC_DAIFMT_CLOCK_PROVIDER_MASK) {
+ case SND_SOC_DAIFMT_BP_FP:
+ /* codec is slave, so cpu is master */
+ mr |= ATMEL_I2SC_MR_MODE_MASTER;
+ ret = atmel_i2s_get_gck_param(dev, params_rate(params));
+ if (ret)
+ return ret;
+ break;
+
+ case SND_SOC_DAIFMT_BC_FC:
+ /* codec is master, so cpu is slave */
+ mr |= ATMEL_I2SC_MR_MODE_SLAVE;
+ dev->gck_param = NULL;
+ break;
+
+ default:
+ dev_err(dev->dev, "unsupported master/slave mode\n");
+ return -EINVAL;
+ }
+
+ switch (params_channels(params)) {
+ case 1:
+ if (is_playback)
+ mr |= ATMEL_I2SC_MR_TXMONO;
+ else
+ mr |= ATMEL_I2SC_MR_RXMONO;
+ break;
+ case 2:
+ break;
+ default:
+ dev_err(dev->dev, "unsupported number of audio channels\n");
+ return -EINVAL;
+ }
+
+ switch (params_format(params)) {
+ case SNDRV_PCM_FORMAT_S8:
+ mr |= ATMEL_I2SC_MR_DATALENGTH_8_BITS;
+ break;
+
+ case SNDRV_PCM_FORMAT_S16_LE:
+ mr |= ATMEL_I2SC_MR_DATALENGTH_16_BITS;
+ break;
+
+ case SNDRV_PCM_FORMAT_S18_3LE:
+ mr |= ATMEL_I2SC_MR_DATALENGTH_18_BITS | ATMEL_I2SC_MR_IWS;
+ break;
+
+ case SNDRV_PCM_FORMAT_S20_3LE:
+ mr |= ATMEL_I2SC_MR_DATALENGTH_20_BITS | ATMEL_I2SC_MR_IWS;
+ break;
+
+ case SNDRV_PCM_FORMAT_S24_3LE:
+ mr |= ATMEL_I2SC_MR_DATALENGTH_24_BITS | ATMEL_I2SC_MR_IWS;
+ break;
+
+ case SNDRV_PCM_FORMAT_S24_LE:
+ mr |= ATMEL_I2SC_MR_DATALENGTH_24_BITS;
+ break;
+
+ case SNDRV_PCM_FORMAT_S32_LE:
+ mr |= ATMEL_I2SC_MR_DATALENGTH_32_BITS;
+ break;
+
+ default:
+ dev_err(dev->dev, "unsupported size/endianness for audio samples\n");
+ return -EINVAL;
+ }
+
+ return regmap_update_bits(dev->regmap, ATMEL_I2SC_MR, mr_mask, mr);
+}
+
+static int atmel_i2s_switch_mck_generator(struct atmel_i2s_dev *dev,
+ bool enabled)
+{
+ unsigned int mr, mr_mask;
+ unsigned long gclk_rate;
+ int ret;
+
+ mr = 0;
+ mr_mask = (ATMEL_I2SC_MR_IMCKDIV_MASK |
+ ATMEL_I2SC_MR_IMCKFS_MASK |
+ ATMEL_I2SC_MR_IMCKMODE_MASK);
+
+ if (!enabled) {
+ /* Disable the I2S Master Clock generator. */
+ ret = regmap_write(dev->regmap, ATMEL_I2SC_CR,
+ ATMEL_I2SC_CR_CKDIS);
+ if (ret)
+ return ret;
+
+ /* Reset the I2S Master Clock generator settings. */
+ ret = regmap_update_bits(dev->regmap, ATMEL_I2SC_MR,
+ mr_mask, mr);
+ if (ret)
+ return ret;
+
+ /* Disable/unprepare the PMC generated clock. */
+ clk_disable_unprepare(dev->gclk);
+
+ return 0;
+ }
+
+ if (!dev->gck_param)
+ return -EINVAL;
+
+ gclk_rate = dev->gck_param->mck * (dev->gck_param->imckdiv + 1);
+
+ ret = clk_set_rate(dev->gclk, gclk_rate);
+ if (ret)
+ return ret;
+
+ ret = clk_prepare_enable(dev->gclk);
+ if (ret)
+ return ret;
+
+ /* Update the Mode Register to generate the I2S Master Clock. */
+ mr |= ATMEL_I2SC_MR_IMCKDIV(dev->gck_param->imckdiv);
+ mr |= ATMEL_I2SC_MR_IMCKFS(dev->gck_param->imckfs);
+ mr |= ATMEL_I2SC_MR_IMCKMODE_I2SMCK;
+ ret = regmap_update_bits(dev->regmap, ATMEL_I2SC_MR, mr_mask, mr);
+ if (ret)
+ return ret;
+
+ /* Finally enable the I2S Master Clock generator. */
+ return regmap_write(dev->regmap, ATMEL_I2SC_CR,
+ ATMEL_I2SC_CR_CKEN);
+}
+
+static int atmel_i2s_trigger(struct snd_pcm_substream *substream, int cmd,
+ struct snd_soc_dai *dai)
+{
+ struct atmel_i2s_dev *dev = snd_soc_dai_get_drvdata(dai);
+ bool is_playback = (substream->stream == SNDRV_PCM_STREAM_PLAYBACK);
+ bool is_master, mck_enabled;
+ unsigned int cr, mr;
+ int err;
+
+ switch (cmd) {
+ case SNDRV_PCM_TRIGGER_START:
+ case SNDRV_PCM_TRIGGER_RESUME:
+ case SNDRV_PCM_TRIGGER_PAUSE_RELEASE:
+ cr = is_playback ? ATMEL_I2SC_CR_TXEN : ATMEL_I2SC_CR_RXEN;
+ mck_enabled = true;
+ break;
+ case SNDRV_PCM_TRIGGER_STOP:
+ case SNDRV_PCM_TRIGGER_SUSPEND:
+ case SNDRV_PCM_TRIGGER_PAUSE_PUSH:
+ cr = is_playback ? ATMEL_I2SC_CR_TXDIS : ATMEL_I2SC_CR_RXDIS;
+ mck_enabled = false;
+ break;
+ default:
+ return -EINVAL;
+ }
+
+ /* Read the Mode Register to retrieve the master/slave state. */
+ err = regmap_read(dev->regmap, ATMEL_I2SC_MR, &mr);
+ if (err)
+ return err;
+ is_master = (mr & ATMEL_I2SC_MR_MODE_MASK) == ATMEL_I2SC_MR_MODE_MASTER;
+
+ /* If master starts, enable the audio clock. */
+ if (is_master && mck_enabled) {
+ if (!dev->clk_use_no) {
+ err = atmel_i2s_switch_mck_generator(dev, true);
+ if (err)
+ return err;
+ }
+ dev->clk_use_no++;
+ }
+
+ err = regmap_write(dev->regmap, ATMEL_I2SC_CR, cr);
+ if (err)
+ return err;
+
+ /* If master stops, disable the audio clock. */
+ if (is_master && !mck_enabled) {
+ if (dev->clk_use_no == 1) {
+ err = atmel_i2s_switch_mck_generator(dev, false);
+ if (err)
+ return err;
+ }
+ dev->clk_use_no--;
+ }
+
+ return err;
+}
+
+static const struct snd_soc_dai_ops atmel_i2s_dai_ops = {
+ .prepare = atmel_i2s_prepare,
+ .trigger = atmel_i2s_trigger,
+ .hw_params = atmel_i2s_hw_params,
+ .set_fmt = atmel_i2s_set_dai_fmt,
+};
+
+static int atmel_i2s_dai_probe(struct snd_soc_dai *dai)
+{
+ struct atmel_i2s_dev *dev = snd_soc_dai_get_drvdata(dai);
+
+ snd_soc_dai_init_dma_data(dai, &dev->playback, &dev->capture);
+ return 0;
+}
+
+static struct snd_soc_dai_driver atmel_i2s_dai = {
+ .probe = atmel_i2s_dai_probe,
+ .playback = {
+ .channels_min = 1,
+ .channels_max = 2,
+ .rates = ATMEL_I2S_RATES,
+ .formats = ATMEL_I2S_FORMATS,
+ },
+ .capture = {
+ .channels_min = 1,
+ .channels_max = 2,
+ .rates = ATMEL_I2S_RATES,
+ .formats = ATMEL_I2S_FORMATS,
+ },
+ .ops = &atmel_i2s_dai_ops,
+ .symmetric_rate = 1,
+ .symmetric_sample_bits = 1,
+};
+
+static const struct snd_soc_component_driver atmel_i2s_component = {
+ .name = "atmel-i2s",
+ .legacy_dai_naming = 1,
+};
+
+static int atmel_i2s_sama5d2_mck_init(struct atmel_i2s_dev *dev,
+ struct device_node *np)
+{
+ struct clk *muxclk;
+ int err;
+
+ if (!dev->gclk)
+ return 0;
+
+ /* muxclk is optional, so we return error for probe defer only */
+ muxclk = devm_clk_get(dev->dev, "muxclk");
+ if (IS_ERR(muxclk)) {
+ err = PTR_ERR(muxclk);
+ if (err == -EPROBE_DEFER)
+ return -EPROBE_DEFER;
+ dev_dbg(dev->dev,
+ "failed to get the I2S clock control: %d\n", err);
+ return 0;
+ }
+
+ return clk_set_parent(muxclk, dev->gclk);
+}
+
+static const struct atmel_i2s_caps atmel_i2s_sama5d2_caps = {
+ .mck_init = atmel_i2s_sama5d2_mck_init,
+};
+
+static const struct of_device_id atmel_i2s_dt_ids[] = {
+ {
+ .compatible = "atmel,sama5d2-i2s",
+ .data = (void *)&atmel_i2s_sama5d2_caps,
+ },
+
+ { /* sentinel */ }
+};
+
+MODULE_DEVICE_TABLE(of, atmel_i2s_dt_ids);
+
+static int atmel_i2s_probe(struct platform_device *pdev)
+{
+ struct device_node *np = pdev->dev.of_node;
+ const struct of_device_id *match;
+ struct atmel_i2s_dev *dev;
+ struct resource *mem;
+ struct regmap *regmap;
+ void __iomem *base;
+ int irq;
+ int err;
+ unsigned int pcm_flags = 0;
+ unsigned int version;
+
+ /* Get memory for driver data. */
+ dev = devm_kzalloc(&pdev->dev, sizeof(*dev), GFP_KERNEL);
+ if (!dev)
+ return -ENOMEM;
+
+ /* Get hardware capabilities. */
+ match = of_match_node(atmel_i2s_dt_ids, np);
+ if (match)
+ dev->caps = match->data;
+
+ /* Map I/O registers. */
+ base = devm_platform_get_and_ioremap_resource(pdev, 0, &mem);
+ if (IS_ERR(base))
+ return PTR_ERR(base);
+
+ regmap = devm_regmap_init_mmio(&pdev->dev, base,
+ &atmel_i2s_regmap_config);
+ if (IS_ERR(regmap))
+ return PTR_ERR(regmap);
+
+ /* Request IRQ. */
+ irq = platform_get_irq(pdev, 0);
+ if (irq < 0)
+ return irq;
+
+ err = devm_request_irq(&pdev->dev, irq, atmel_i2s_interrupt, 0,
+ dev_name(&pdev->dev), dev);
+ if (err)
+ return err;
+
+ /* Get the peripheral clock. */
+ dev->pclk = devm_clk_get(&pdev->dev, "pclk");
+ if (IS_ERR(dev->pclk)) {
+ err = PTR_ERR(dev->pclk);
+ dev_err(&pdev->dev,
+ "failed to get the peripheral clock: %d\n", err);
+ return err;
+ }
+
+ /* Get audio clock to generate the I2S Master Clock (I2S_MCK) */
+ dev->gclk = devm_clk_get(&pdev->dev, "gclk");
+ if (IS_ERR(dev->gclk)) {
+ if (PTR_ERR(dev->gclk) == -EPROBE_DEFER)
+ return -EPROBE_DEFER;
+ /* Master Mode not supported */
+ dev->gclk = NULL;
+ }
+ dev->dev = &pdev->dev;
+ dev->regmap = regmap;
+ platform_set_drvdata(pdev, dev);
+
+ /* Do hardware specific settings to initialize I2S_MCK generator */
+ if (dev->caps && dev->caps->mck_init) {
+ err = dev->caps->mck_init(dev, np);
+ if (err)
+ return err;
+ }
+
+ /* Enable the peripheral clock. */
+ err = clk_prepare_enable(dev->pclk);
+ if (err)
+ return err;
+
+ /* Get IP version. */
+ regmap_read(dev->regmap, ATMEL_I2SC_VERSION, &version);
+ dev_info(&pdev->dev, "hw version: %#x\n", version);
+
+ /* Enable error interrupts. */
+ regmap_write(dev->regmap, ATMEL_I2SC_IER,
+ ATMEL_I2SC_INT_RXOR | ATMEL_I2SC_INT_TXUR);
+
+ err = devm_snd_soc_register_component(&pdev->dev,
+ &atmel_i2s_component,
+ &atmel_i2s_dai, 1);
+ if (err) {
+ dev_err(&pdev->dev, "failed to register DAI: %d\n", err);
+ clk_disable_unprepare(dev->pclk);
+ return err;
+ }
+
+ /* Prepare DMA config. */
+ dev->playback.addr = (dma_addr_t)mem->start + ATMEL_I2SC_THR;
+ dev->playback.maxburst = 1;
+ dev->capture.addr = (dma_addr_t)mem->start + ATMEL_I2SC_RHR;
+ dev->capture.maxburst = 1;
+
+ if (of_property_match_string(np, "dma-names", "rx-tx") == 0)
+ pcm_flags |= SND_DMAENGINE_PCM_FLAG_HALF_DUPLEX;
+ err = devm_snd_dmaengine_pcm_register(&pdev->dev, NULL, pcm_flags);
+ if (err) {
+ dev_err(&pdev->dev, "failed to register PCM: %d\n", err);
+ clk_disable_unprepare(dev->pclk);
+ return err;
+ }
+
+ return 0;
+}
+
+static int atmel_i2s_remove(struct platform_device *pdev)
+{
+ struct atmel_i2s_dev *dev = platform_get_drvdata(pdev);
+
+ clk_disable_unprepare(dev->pclk);
+
+ return 0;
+}
+
+static struct platform_driver atmel_i2s_driver = {
+ .driver = {
+ .name = "atmel_i2s",
+ .of_match_table = of_match_ptr(atmel_i2s_dt_ids),
+ },
+ .probe = atmel_i2s_probe,
+ .remove = atmel_i2s_remove,
+};
+module_platform_driver(atmel_i2s_driver);
+
+MODULE_DESCRIPTION("Atmel I2S Controller driver");
+MODULE_AUTHOR("Cyrille Pitchen <cyrille.pitchen@atmel.com>");
+MODULE_LICENSE("GPL v2");
diff --git a/sound/soc/atmel/atmel-pcm-dma.c b/sound/soc/atmel/atmel-pcm-dma.c
new file mode 100644
index 000000000..96a8c7dba
--- /dev/null
+++ b/sound/soc/atmel/atmel-pcm-dma.c
@@ -0,0 +1,120 @@
+// SPDX-License-Identifier: GPL-2.0-or-later
+/*
+ * atmel-pcm-dma.c -- ALSA PCM DMA support for the Atmel SoC.
+ *
+ * Copyright (C) 2012 Atmel
+ *
+ * Author: Bo Shen <voice.shen@atmel.com>
+ *
+ * Based on atmel-pcm by:
+ * Sedji Gaouaou <sedji.gaouaou@atmel.com>
+ * Copyright 2008 Atmel
+ */
+
+#include <linux/module.h>
+#include <linux/init.h>
+#include <linux/platform_device.h>
+#include <linux/slab.h>
+#include <linux/dma-mapping.h>
+#include <linux/dmaengine.h>
+#include <linux/atmel-ssc.h>
+
+#include <sound/core.h>
+#include <sound/pcm.h>
+#include <sound/pcm_params.h>
+#include <sound/soc.h>
+#include <sound/dmaengine_pcm.h>
+
+#include "atmel-pcm.h"
+
+/*--------------------------------------------------------------------------*\
+ * Hardware definition
+\*--------------------------------------------------------------------------*/
+static const struct snd_pcm_hardware atmel_pcm_dma_hardware = {
+ .info = SNDRV_PCM_INFO_MMAP |
+ SNDRV_PCM_INFO_MMAP_VALID |
+ SNDRV_PCM_INFO_INTERLEAVED |
+ SNDRV_PCM_INFO_RESUME |
+ SNDRV_PCM_INFO_PAUSE,
+ .period_bytes_min = 256, /* lighting DMA overhead */
+ .period_bytes_max = 2 * 0xffff, /* if 2 bytes format */
+ .periods_min = 8,
+ .periods_max = 1024, /* no limit */
+ .buffer_bytes_max = 512 * 1024,
+};
+
+/*
+ * atmel_pcm_dma_irq: SSC interrupt handler for DMAENGINE enabled SSC
+ *
+ * We use DMAENGINE to send/receive data to/from SSC so this ISR is only to
+ * check if any overrun occured.
+ */
+static void atmel_pcm_dma_irq(u32 ssc_sr,
+ struct snd_pcm_substream *substream)
+{
+ struct snd_soc_pcm_runtime *rtd = asoc_substream_to_rtd(substream);
+ struct atmel_pcm_dma_params *prtd;
+
+ prtd = snd_soc_dai_get_dma_data(asoc_rtd_to_cpu(rtd, 0), substream);
+
+ if (ssc_sr & prtd->mask->ssc_error) {
+ if (snd_pcm_running(substream))
+ pr_warn("atmel-pcm: buffer %s on %s (SSC_SR=%#x)\n",
+ substream->stream == SNDRV_PCM_STREAM_PLAYBACK
+ ? "underrun" : "overrun", prtd->name,
+ ssc_sr);
+
+ /* stop RX and capture: will be enabled again at restart */
+ ssc_writex(prtd->ssc->regs, SSC_CR, prtd->mask->ssc_disable);
+ snd_pcm_stop_xrun(substream);
+
+ /* now drain RHR and read status to remove xrun condition */
+ ssc_readx(prtd->ssc->regs, SSC_RHR);
+ ssc_readx(prtd->ssc->regs, SSC_SR);
+ }
+}
+
+static int atmel_pcm_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 = asoc_substream_to_rtd(substream);
+ struct atmel_pcm_dma_params *prtd;
+ struct ssc_device *ssc;
+ int ret;
+
+ prtd = snd_soc_dai_get_dma_data(asoc_rtd_to_cpu(rtd, 0), substream);
+ ssc = prtd->ssc;
+
+ ret = snd_hwparams_to_dma_slave_config(substream, params, slave_config);
+ if (ret) {
+ pr_err("atmel-pcm: hwparams to dma slave configure failed\n");
+ return ret;
+ }
+
+ slave_config->dst_addr = ssc->phybase + SSC_THR;
+ slave_config->dst_maxburst = 1;
+
+ slave_config->src_addr = ssc->phybase + SSC_RHR;
+ slave_config->src_maxburst = 1;
+
+ prtd->dma_intr_handler = atmel_pcm_dma_irq;
+
+ return 0;
+}
+
+static const struct snd_dmaengine_pcm_config atmel_dmaengine_pcm_config = {
+ .prepare_slave_config = atmel_pcm_configure_dma,
+ .pcm_hardware = &atmel_pcm_dma_hardware,
+ .prealloc_buffer_size = 64 * 1024,
+};
+
+int atmel_pcm_dma_platform_register(struct device *dev)
+{
+ return devm_snd_dmaengine_pcm_register(dev,
+ &atmel_dmaengine_pcm_config, 0);
+}
+EXPORT_SYMBOL(atmel_pcm_dma_platform_register);
+
+MODULE_AUTHOR("Bo Shen <voice.shen@atmel.com>");
+MODULE_DESCRIPTION("Atmel DMA based PCM module");
+MODULE_LICENSE("GPL");
diff --git a/sound/soc/atmel/atmel-pcm-pdc.c b/sound/soc/atmel/atmel-pcm-pdc.c
new file mode 100644
index 000000000..3e7ea2021
--- /dev/null
+++ b/sound/soc/atmel/atmel-pcm-pdc.c
@@ -0,0 +1,331 @@
+// SPDX-License-Identifier: GPL-2.0-or-later
+/*
+ * atmel-pcm.c -- ALSA PCM interface for the Atmel atmel SoC.
+ *
+ * Copyright (C) 2005 SAN People
+ * Copyright (C) 2008 Atmel
+ *
+ * Authors: Sedji Gaouaou <sedji.gaouaou@atmel.com>
+ *
+ * Based on at91-pcm. by:
+ * Frank Mandarino <fmandarino@endrelia.com>
+ * Copyright 2006 Endrelia Technologies Inc.
+ *
+ * Based on pxa2xx-pcm.c by:
+ *
+ * Author: Nicolas Pitre
+ * Created: Nov 30, 2004
+ * Copyright: (C) 2004 MontaVista Software, Inc.
+ */
+
+#include <linux/module.h>
+#include <linux/init.h>
+#include <linux/platform_device.h>
+#include <linux/slab.h>
+#include <linux/dma-mapping.h>
+#include <linux/atmel_pdc.h>
+#include <linux/atmel-ssc.h>
+
+#include <sound/core.h>
+#include <sound/pcm.h>
+#include <sound/pcm_params.h>
+#include <sound/soc.h>
+
+#include "atmel-pcm.h"
+
+
+static int atmel_pcm_new(struct snd_soc_component *component,
+ struct snd_soc_pcm_runtime *rtd)
+{
+ struct snd_card *card = rtd->card->snd_card;
+ int ret;
+
+ ret = dma_coerce_mask_and_coherent(card->dev, DMA_BIT_MASK(32));
+ if (ret)
+ return ret;
+
+ snd_pcm_set_managed_buffer_all(rtd->pcm, SNDRV_DMA_TYPE_DEV,
+ card->dev, ATMEL_SSC_DMABUF_SIZE,
+ ATMEL_SSC_DMABUF_SIZE);
+
+ return 0;
+}
+
+/*--------------------------------------------------------------------------*\
+ * Hardware definition
+\*--------------------------------------------------------------------------*/
+/* TODO: These values were taken from the AT91 platform driver, check
+ * them against real values for AT32
+ */
+static const struct snd_pcm_hardware atmel_pcm_hardware = {
+ .info = SNDRV_PCM_INFO_MMAP |
+ SNDRV_PCM_INFO_MMAP_VALID |
+ SNDRV_PCM_INFO_INTERLEAVED |
+ SNDRV_PCM_INFO_PAUSE,
+ .period_bytes_min = 32,
+ .period_bytes_max = 8192,
+ .periods_min = 2,
+ .periods_max = 1024,
+ .buffer_bytes_max = ATMEL_SSC_DMABUF_SIZE,
+};
+
+
+/*--------------------------------------------------------------------------*\
+ * Data types
+\*--------------------------------------------------------------------------*/
+struct atmel_runtime_data {
+ struct atmel_pcm_dma_params *params;
+ dma_addr_t dma_buffer; /* physical address of dma buffer */
+ dma_addr_t dma_buffer_end; /* first address beyond DMA buffer */
+ size_t period_size;
+
+ dma_addr_t period_ptr; /* physical address of next period */
+};
+
+/*--------------------------------------------------------------------------*\
+ * ISR
+\*--------------------------------------------------------------------------*/
+static void atmel_pcm_dma_irq(u32 ssc_sr,
+ struct snd_pcm_substream *substream)
+{
+ struct atmel_runtime_data *prtd = substream->runtime->private_data;
+ struct atmel_pcm_dma_params *params = prtd->params;
+ static int count;
+
+ count++;
+
+ if (ssc_sr & params->mask->ssc_endbuf) {
+ pr_warn("atmel-pcm: buffer %s on %s (SSC_SR=%#x, count=%d)\n",
+ substream->stream == SNDRV_PCM_STREAM_PLAYBACK
+ ? "underrun" : "overrun",
+ params->name, ssc_sr, count);
+
+ /* re-start the PDC */
+ ssc_writex(params->ssc->regs, ATMEL_PDC_PTCR,
+ params->mask->pdc_disable);
+ prtd->period_ptr += prtd->period_size;
+ if (prtd->period_ptr >= prtd->dma_buffer_end)
+ prtd->period_ptr = prtd->dma_buffer;
+
+ ssc_writex(params->ssc->regs, params->pdc->xpr,
+ prtd->period_ptr);
+ ssc_writex(params->ssc->regs, params->pdc->xcr,
+ prtd->period_size / params->pdc_xfer_size);
+ ssc_writex(params->ssc->regs, ATMEL_PDC_PTCR,
+ params->mask->pdc_enable);
+ }
+
+ if (ssc_sr & params->mask->ssc_endx) {
+ /* Load the PDC next pointer and counter registers */
+ prtd->period_ptr += prtd->period_size;
+ if (prtd->period_ptr >= prtd->dma_buffer_end)
+ prtd->period_ptr = prtd->dma_buffer;
+
+ ssc_writex(params->ssc->regs, params->pdc->xnpr,
+ prtd->period_ptr);
+ ssc_writex(params->ssc->regs, params->pdc->xncr,
+ prtd->period_size / params->pdc_xfer_size);
+ }
+
+ snd_pcm_period_elapsed(substream);
+}
+
+
+/*--------------------------------------------------------------------------*\
+ * PCM operations
+\*--------------------------------------------------------------------------*/
+static int atmel_pcm_hw_params(struct snd_soc_component *component,
+ struct snd_pcm_substream *substream,
+ struct snd_pcm_hw_params *params)
+{
+ struct snd_pcm_runtime *runtime = substream->runtime;
+ struct atmel_runtime_data *prtd = runtime->private_data;
+ struct snd_soc_pcm_runtime *rtd = asoc_substream_to_rtd(substream);
+
+ /* this may get called several times by oss emulation
+ * with different params */
+
+ prtd->params = snd_soc_dai_get_dma_data(asoc_rtd_to_cpu(rtd, 0), substream);
+ prtd->params->dma_intr_handler = atmel_pcm_dma_irq;
+
+ prtd->dma_buffer = runtime->dma_addr;
+ prtd->dma_buffer_end = runtime->dma_addr + runtime->dma_bytes;
+ prtd->period_size = params_period_bytes(params);
+
+ pr_debug("atmel-pcm: "
+ "hw_params: DMA for %s initialized "
+ "(dma_bytes=%zu, period_size=%zu)\n",
+ prtd->params->name,
+ runtime->dma_bytes,
+ prtd->period_size);
+ return 0;
+}
+
+static int atmel_pcm_hw_free(struct snd_soc_component *component,
+ struct snd_pcm_substream *substream)
+{
+ struct atmel_runtime_data *prtd = substream->runtime->private_data;
+ struct atmel_pcm_dma_params *params = prtd->params;
+
+ if (params != NULL) {
+ ssc_writex(params->ssc->regs, SSC_PDC_PTCR,
+ params->mask->pdc_disable);
+ prtd->params->dma_intr_handler = NULL;
+ }
+
+ return 0;
+}
+
+static int atmel_pcm_prepare(struct snd_soc_component *component,
+ struct snd_pcm_substream *substream)
+{
+ struct atmel_runtime_data *prtd = substream->runtime->private_data;
+ struct atmel_pcm_dma_params *params = prtd->params;
+
+ ssc_writex(params->ssc->regs, SSC_IDR,
+ params->mask->ssc_endx | params->mask->ssc_endbuf);
+ ssc_writex(params->ssc->regs, ATMEL_PDC_PTCR,
+ params->mask->pdc_disable);
+ return 0;
+}
+
+static int atmel_pcm_trigger(struct snd_soc_component *component,
+ struct snd_pcm_substream *substream, int cmd)
+{
+ struct snd_pcm_runtime *rtd = substream->runtime;
+ struct atmel_runtime_data *prtd = rtd->private_data;
+ struct atmel_pcm_dma_params *params = prtd->params;
+ int ret = 0;
+
+ pr_debug("atmel-pcm:buffer_size = %ld,"
+ "dma_area = %p, dma_bytes = %zu\n",
+ rtd->buffer_size, rtd->dma_area, rtd->dma_bytes);
+
+ switch (cmd) {
+ case SNDRV_PCM_TRIGGER_START:
+ prtd->period_ptr = prtd->dma_buffer;
+
+ ssc_writex(params->ssc->regs, params->pdc->xpr,
+ prtd->period_ptr);
+ ssc_writex(params->ssc->regs, params->pdc->xcr,
+ prtd->period_size / params->pdc_xfer_size);
+
+ prtd->period_ptr += prtd->period_size;
+ ssc_writex(params->ssc->regs, params->pdc->xnpr,
+ prtd->period_ptr);
+ ssc_writex(params->ssc->regs, params->pdc->xncr,
+ prtd->period_size / params->pdc_xfer_size);
+
+ pr_debug("atmel-pcm: trigger: "
+ "period_ptr=%lx, xpr=%u, "
+ "xcr=%u, xnpr=%u, xncr=%u\n",
+ (unsigned long)prtd->period_ptr,
+ ssc_readx(params->ssc->regs, params->pdc->xpr),
+ ssc_readx(params->ssc->regs, params->pdc->xcr),
+ ssc_readx(params->ssc->regs, params->pdc->xnpr),
+ ssc_readx(params->ssc->regs, params->pdc->xncr));
+
+ ssc_writex(params->ssc->regs, SSC_IER,
+ params->mask->ssc_endx | params->mask->ssc_endbuf);
+ ssc_writex(params->ssc->regs, SSC_PDC_PTCR,
+ params->mask->pdc_enable);
+
+ pr_debug("sr=%u imr=%u\n",
+ ssc_readx(params->ssc->regs, SSC_SR),
+ ssc_readx(params->ssc->regs, SSC_IER));
+ break; /* SNDRV_PCM_TRIGGER_START */
+
+ case SNDRV_PCM_TRIGGER_STOP:
+ case SNDRV_PCM_TRIGGER_SUSPEND:
+ case SNDRV_PCM_TRIGGER_PAUSE_PUSH:
+ ssc_writex(params->ssc->regs, ATMEL_PDC_PTCR,
+ params->mask->pdc_disable);
+ break;
+
+ case SNDRV_PCM_TRIGGER_RESUME:
+ case SNDRV_PCM_TRIGGER_PAUSE_RELEASE:
+ ssc_writex(params->ssc->regs, ATMEL_PDC_PTCR,
+ params->mask->pdc_enable);
+ break;
+
+ default:
+ ret = -EINVAL;
+ }
+
+ return ret;
+}
+
+static snd_pcm_uframes_t atmel_pcm_pointer(struct snd_soc_component *component,
+ struct snd_pcm_substream *substream)
+{
+ struct snd_pcm_runtime *runtime = substream->runtime;
+ struct atmel_runtime_data *prtd = runtime->private_data;
+ struct atmel_pcm_dma_params *params = prtd->params;
+ dma_addr_t ptr;
+ snd_pcm_uframes_t x;
+
+ ptr = (dma_addr_t) ssc_readx(params->ssc->regs, params->pdc->xpr);
+ x = bytes_to_frames(runtime, ptr - prtd->dma_buffer);
+
+ if (x == runtime->buffer_size)
+ x = 0;
+
+ return x;
+}
+
+static int atmel_pcm_open(struct snd_soc_component *component,
+ struct snd_pcm_substream *substream)
+{
+ struct snd_pcm_runtime *runtime = substream->runtime;
+ struct atmel_runtime_data *prtd;
+ int ret = 0;
+
+ snd_soc_set_runtime_hwparams(substream, &atmel_pcm_hardware);
+
+ /* ensure that buffer size is a multiple of period size */
+ ret = snd_pcm_hw_constraint_integer(runtime,
+ SNDRV_PCM_HW_PARAM_PERIODS);
+ if (ret < 0)
+ goto out;
+
+ prtd = kzalloc(sizeof(struct atmel_runtime_data), GFP_KERNEL);
+ if (prtd == NULL) {
+ ret = -ENOMEM;
+ goto out;
+ }
+ runtime->private_data = prtd;
+
+ out:
+ return ret;
+}
+
+static int atmel_pcm_close(struct snd_soc_component *component,
+ struct snd_pcm_substream *substream)
+{
+ struct atmel_runtime_data *prtd = substream->runtime->private_data;
+
+ kfree(prtd);
+ return 0;
+}
+
+static const struct snd_soc_component_driver atmel_soc_platform = {
+ .open = atmel_pcm_open,
+ .close = atmel_pcm_close,
+ .hw_params = atmel_pcm_hw_params,
+ .hw_free = atmel_pcm_hw_free,
+ .prepare = atmel_pcm_prepare,
+ .trigger = atmel_pcm_trigger,
+ .pointer = atmel_pcm_pointer,
+ .pcm_construct = atmel_pcm_new,
+};
+
+int atmel_pcm_pdc_platform_register(struct device *dev)
+{
+ return devm_snd_soc_register_component(dev, &atmel_soc_platform,
+ NULL, 0);
+}
+EXPORT_SYMBOL(atmel_pcm_pdc_platform_register);
+
+MODULE_AUTHOR("Sedji Gaouaou <sedji.gaouaou@atmel.com>");
+MODULE_DESCRIPTION("Atmel PCM module");
+MODULE_LICENSE("GPL");
diff --git a/sound/soc/atmel/atmel-pcm.h b/sound/soc/atmel/atmel-pcm.h
new file mode 100644
index 000000000..2e648748e
--- /dev/null
+++ b/sound/soc/atmel/atmel-pcm.h
@@ -0,0 +1,91 @@
+/* SPDX-License-Identifier: GPL-2.0-or-later */
+/*
+ * at91-pcm.h - ALSA PCM interface for the Atmel AT91 SoC.
+ *
+ * Copyright (C) 2005 SAN People
+ * Copyright (C) 2008 Atmel
+ *
+ * Authors: Sedji Gaouaou <sedji.gaouaou@atmel.com>
+ *
+ * Based on at91-pcm. by:
+ * Frank Mandarino <fmandarino@endrelia.com>
+ * Copyright 2006 Endrelia Technologies Inc.
+ *
+ * Based on pxa2xx-pcm.c by:
+ *
+ * Author: Nicolas Pitre
+ * Created: Nov 30, 2004
+ * Copyright: (C) 2004 MontaVista Software, Inc.
+ */
+
+#ifndef _ATMEL_PCM_H
+#define _ATMEL_PCM_H
+
+#include <linux/atmel-ssc.h>
+
+#define ATMEL_SSC_DMABUF_SIZE (64 * 1024)
+
+/*
+ * Registers and status bits that are required by the PCM driver.
+ */
+struct atmel_pdc_regs {
+ unsigned int xpr; /* PDC recv/trans pointer */
+ unsigned int xcr; /* PDC recv/trans counter */
+ unsigned int xnpr; /* PDC next recv/trans pointer */
+ unsigned int xncr; /* PDC next recv/trans counter */
+ unsigned int ptcr; /* PDC transfer control */
+};
+
+struct atmel_ssc_mask {
+ u32 ssc_enable; /* SSC recv/trans enable */
+ u32 ssc_disable; /* SSC recv/trans disable */
+ u32 ssc_error; /* SSC error conditions */
+ u32 ssc_endx; /* SSC ENDTX or ENDRX */
+ u32 ssc_endbuf; /* SSC TXBUFE or RXBUFF */
+ u32 pdc_enable; /* PDC recv/trans enable */
+ u32 pdc_disable; /* PDC recv/trans disable */
+};
+
+/*
+ * This structure, shared between the PCM driver and the interface,
+ * contains all information required by the PCM driver to perform the
+ * PDC DMA operation. All fields except dma_intr_handler() are initialized
+ * by the interface. The dma_intr_handler() pointer is set by the PCM
+ * driver and called by the interface SSC interrupt handler if it is
+ * non-NULL.
+ */
+struct atmel_pcm_dma_params {
+ char *name; /* stream identifier */
+ int pdc_xfer_size; /* PDC counter increment in bytes */
+ struct ssc_device *ssc; /* SSC device for stream */
+ struct atmel_pdc_regs *pdc; /* PDC receive or transmit registers */
+ struct atmel_ssc_mask *mask; /* SSC & PDC status bits */
+ struct snd_pcm_substream *substream;
+ void (*dma_intr_handler)(u32, struct snd_pcm_substream *);
+};
+
+/*
+ * SSC register access (since ssc_writel() / ssc_readl() require literal name)
+ */
+#define ssc_readx(base, reg) (__raw_readl((base) + (reg)))
+#define ssc_writex(base, reg, value) __raw_writel((value), (base) + (reg))
+
+#if IS_ENABLED(CONFIG_SND_ATMEL_SOC_PDC)
+int atmel_pcm_pdc_platform_register(struct device *dev);
+#else
+static inline int atmel_pcm_pdc_platform_register(struct device *dev)
+{
+ return 0;
+}
+#endif
+
+#if IS_ENABLED(CONFIG_SND_ATMEL_SOC_DMA)
+int atmel_pcm_dma_platform_register(struct device *dev);
+#else
+static inline int atmel_pcm_dma_platform_register(struct device *dev)
+{
+ return 0;
+}
+#endif
+
+#endif /* _ATMEL_PCM_H */
diff --git a/sound/soc/atmel/atmel-pdmic.c b/sound/soc/atmel/atmel-pdmic.c
new file mode 100644
index 000000000..77ff12bae
--- /dev/null
+++ b/sound/soc/atmel/atmel-pdmic.c
@@ -0,0 +1,713 @@
+// SPDX-License-Identifier: GPL-2.0-or-later
+/* Atmel PDMIC driver
+ *
+ * Copyright (C) 2015 Atmel
+ *
+ * Author: Songjun Wu <songjun.wu@atmel.com>
+ */
+
+#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-pdmic.h"
+
+struct atmel_pdmic_pdata {
+ u32 mic_min_freq;
+ u32 mic_max_freq;
+ s32 mic_offset;
+ const char *card_name;
+};
+
+struct atmel_pdmic {
+ dma_addr_t phy_base;
+ struct regmap *regmap;
+ struct clk *pclk;
+ struct clk *gclk;
+ struct device *dev;
+ int irq;
+ struct snd_pcm_substream *substream;
+ const struct atmel_pdmic_pdata *pdata;
+};
+
+static const struct of_device_id atmel_pdmic_of_match[] = {
+ {
+ .compatible = "atmel,sama5d2-pdmic",
+ }, {
+ /* sentinel */
+ }
+};
+MODULE_DEVICE_TABLE(of, atmel_pdmic_of_match);
+
+#define PDMIC_OFFSET_MAX_VAL S16_MAX
+#define PDMIC_OFFSET_MIN_VAL S16_MIN
+
+static struct atmel_pdmic_pdata *atmel_pdmic_dt_init(struct device *dev)
+{
+ struct device_node *np = dev->of_node;
+ struct atmel_pdmic_pdata *pdata;
+
+ 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);
+
+ if (of_property_read_string(np, "atmel,model", &pdata->card_name))
+ pdata->card_name = "PDMIC";
+
+ if (of_property_read_u32(np, "atmel,mic-min-freq",
+ &pdata->mic_min_freq)) {
+ dev_err(dev, "failed to get mic-min-freq\n");
+ return ERR_PTR(-EINVAL);
+ }
+
+ if (of_property_read_u32(np, "atmel,mic-max-freq",
+ &pdata->mic_max_freq)) {
+ dev_err(dev, "failed to get mic-max-freq\n");
+ return ERR_PTR(-EINVAL);
+ }
+
+ if (pdata->mic_max_freq < pdata->mic_min_freq) {
+ dev_err(dev,
+ "mic-max-freq should not be less than mic-min-freq\n");
+ return ERR_PTR(-EINVAL);
+ }
+
+ if (of_property_read_s32(np, "atmel,mic-offset", &pdata->mic_offset))
+ pdata->mic_offset = 0;
+
+ if (pdata->mic_offset > PDMIC_OFFSET_MAX_VAL) {
+ dev_warn(dev,
+ "mic-offset value %d is larger than the max value %d, the max value is specified\n",
+ pdata->mic_offset, PDMIC_OFFSET_MAX_VAL);
+ pdata->mic_offset = PDMIC_OFFSET_MAX_VAL;
+ } else if (pdata->mic_offset < PDMIC_OFFSET_MIN_VAL) {
+ dev_warn(dev,
+ "mic-offset value %d is less than the min value %d, the min value is specified\n",
+ pdata->mic_offset, PDMIC_OFFSET_MIN_VAL);
+ pdata->mic_offset = PDMIC_OFFSET_MIN_VAL;
+ }
+
+ return pdata;
+}
+
+/* cpu dai component */
+static int atmel_pdmic_cpu_dai_startup(struct snd_pcm_substream *substream,
+ struct snd_soc_dai *cpu_dai)
+{
+ struct snd_soc_pcm_runtime *rtd = asoc_substream_to_rtd(substream);
+ struct atmel_pdmic *dd = snd_soc_card_get_drvdata(rtd->card);
+ int ret;
+
+ ret = clk_prepare_enable(dd->gclk);
+ if (ret)
+ return ret;
+
+ ret = clk_prepare_enable(dd->pclk);
+ if (ret) {
+ clk_disable_unprepare(dd->gclk);
+ return ret;
+ }
+
+ /* Clear all bits in the Control Register(PDMIC_CR) */
+ regmap_write(dd->regmap, PDMIC_CR, 0);
+
+ dd->substream = substream;
+
+ /* Enable the overrun error interrupt */
+ regmap_write(dd->regmap, PDMIC_IER, PDMIC_IER_OVRE);
+
+ return 0;
+}
+
+static void atmel_pdmic_cpu_dai_shutdown(struct snd_pcm_substream *substream,
+ struct snd_soc_dai *cpu_dai)
+{
+ struct snd_soc_pcm_runtime *rtd = asoc_substream_to_rtd(substream);
+ struct atmel_pdmic *dd = snd_soc_card_get_drvdata(rtd->card);
+
+ /* Disable the overrun error interrupt */
+ regmap_write(dd->regmap, PDMIC_IDR, PDMIC_IDR_OVRE);
+
+ clk_disable_unprepare(dd->gclk);
+ clk_disable_unprepare(dd->pclk);
+}
+
+static int atmel_pdmic_cpu_dai_prepare(struct snd_pcm_substream *substream,
+ struct snd_soc_dai *cpu_dai)
+{
+ struct snd_soc_pcm_runtime *rtd = asoc_substream_to_rtd(substream);
+ struct atmel_pdmic *dd = snd_soc_card_get_drvdata(rtd->card);
+ struct snd_soc_component *component = cpu_dai->component;
+ u32 val;
+ int ret;
+
+ /* Clean the PDMIC Converted Data Register */
+ ret = regmap_read(dd->regmap, PDMIC_CDR, &val);
+ if (ret < 0)
+ return 0;
+
+ ret = snd_soc_component_update_bits(component, PDMIC_CR,
+ PDMIC_CR_ENPDM_MASK,
+ PDMIC_CR_ENPDM_DIS <<
+ PDMIC_CR_ENPDM_SHIFT);
+ if (ret < 0)
+ return ret;
+
+ return 0;
+}
+
+#define ATMEL_PDMIC_FORMATS (SNDRV_PCM_FMTBIT_S16_LE | SNDRV_PCM_FMTBIT_S32_LE)
+
+/* platform */
+#define ATMEL_PDMIC_MAX_BUF_SIZE (64 * 1024)
+#define ATMEL_PDMIC_PREALLOC_BUF_SIZE ATMEL_PDMIC_MAX_BUF_SIZE
+
+static const struct snd_pcm_hardware atmel_pdmic_hw = {
+ .info = SNDRV_PCM_INFO_MMAP
+ | SNDRV_PCM_INFO_MMAP_VALID
+ | SNDRV_PCM_INFO_INTERLEAVED
+ | SNDRV_PCM_INFO_RESUME
+ | SNDRV_PCM_INFO_PAUSE,
+ .formats = ATMEL_PDMIC_FORMATS,
+ .buffer_bytes_max = ATMEL_PDMIC_MAX_BUF_SIZE,
+ .period_bytes_min = 256,
+ .period_bytes_max = 32 * 1024,
+ .periods_min = 2,
+ .periods_max = 256,
+};
+
+static int
+atmel_pdmic_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 = asoc_substream_to_rtd(substream);
+ struct atmel_pdmic *dd = snd_soc_card_get_drvdata(rtd->card);
+ int ret;
+
+ ret = snd_hwparams_to_dma_slave_config(substream, params,
+ slave_config);
+ if (ret) {
+ dev_err(dd->dev,
+ "hw params to dma slave configure failed\n");
+ return ret;
+ }
+
+ slave_config->src_addr = dd->phy_base + PDMIC_CDR;
+ slave_config->src_maxburst = 1;
+ slave_config->dst_maxburst = 1;
+
+ return 0;
+}
+
+static const struct snd_dmaengine_pcm_config
+atmel_pdmic_dmaengine_pcm_config = {
+ .prepare_slave_config = atmel_pdmic_platform_configure_dma,
+ .pcm_hardware = &atmel_pdmic_hw,
+ .prealloc_buffer_size = ATMEL_PDMIC_PREALLOC_BUF_SIZE,
+};
+
+/* codec */
+/* Mic Gain = dgain * 2^(-scale) */
+struct mic_gain {
+ unsigned int dgain;
+ unsigned int scale;
+};
+
+/* range from -90 dB to 90 dB */
+static const struct mic_gain mic_gain_table[] = {
+{ 1, 15}, { 1, 14}, /* -90, -84 dB */
+{ 3, 15}, { 1, 13}, { 3, 14}, { 1, 12}, /* -81, -78, -75, -72 dB */
+{ 5, 14}, { 13, 15}, /* -70, -68 dB */
+{ 9, 14}, { 21, 15}, { 23, 15}, { 13, 14}, /* -65 ~ -62 dB */
+{ 29, 15}, { 33, 15}, { 37, 15}, { 41, 15}, /* -61 ~ -58 dB */
+{ 23, 14}, { 13, 13}, { 58, 15}, { 65, 15}, /* -57 ~ -54 dB */
+{ 73, 15}, { 41, 14}, { 23, 13}, { 13, 12}, /* -53 ~ -50 dB */
+{ 29, 13}, { 65, 14}, { 73, 14}, { 41, 13}, /* -49 ~ -46 dB */
+{ 23, 12}, { 207, 15}, { 29, 12}, { 65, 13}, /* -45 ~ -42 dB */
+{ 73, 13}, { 41, 12}, { 23, 11}, { 413, 15}, /* -41 ~ -38 dB */
+{ 463, 15}, { 519, 15}, { 583, 15}, { 327, 14}, /* -37 ~ -34 dB */
+{ 367, 14}, { 823, 15}, { 231, 13}, { 1036, 15}, /* -33 ~ -30 dB */
+{ 1163, 15}, { 1305, 15}, { 183, 12}, { 1642, 15}, /* -29 ~ -26 dB */
+{ 1843, 15}, { 2068, 15}, { 145, 11}, { 2603, 15}, /* -25 ~ -22 dB */
+{ 365, 12}, { 3277, 15}, { 3677, 15}, { 4125, 15}, /* -21 ~ -18 dB */
+{ 4629, 15}, { 5193, 15}, { 5827, 15}, { 3269, 14}, /* -17 ~ -14 dB */
+{ 917, 12}, { 8231, 15}, { 9235, 15}, { 5181, 14}, /* -13 ~ -10 dB */
+{11627, 15}, {13045, 15}, {14637, 15}, {16423, 15}, /* -9 ~ -6 dB */
+{18427, 15}, {20675, 15}, { 5799, 13}, {26029, 15}, /* -5 ~ -2 dB */
+{ 7301, 13}, { 1, 0}, {18383, 14}, {10313, 13}, /* -1 ~ 2 dB */
+{23143, 14}, {25967, 14}, {29135, 14}, {16345, 13}, /* 3 ~ 6 dB */
+{ 4585, 11}, {20577, 13}, { 1443, 9}, {25905, 13}, /* 7 ~ 10 dB */
+{14533, 12}, { 8153, 11}, { 2287, 9}, {20529, 12}, /* 11 ~ 14 dB */
+{11517, 11}, { 6461, 10}, {28997, 12}, { 4067, 9}, /* 15 ~ 18 dB */
+{18253, 11}, { 10, 0}, {22979, 11}, {25783, 11}, /* 19 ~ 22 dB */
+{28929, 11}, {32459, 11}, { 9105, 9}, {20431, 10}, /* 23 ~ 26 dB */
+{22925, 10}, {12861, 9}, { 7215, 8}, {16191, 9}, /* 27 ~ 30 dB */
+{ 9083, 8}, {20383, 9}, {11435, 8}, { 6145, 7}, /* 31 ~ 34 dB */
+{ 3599, 6}, {32305, 9}, {18123, 8}, {20335, 8}, /* 35 ~ 38 dB */
+{ 713, 3}, { 100, 0}, { 7181, 6}, { 8057, 6}, /* 39 ~ 42 dB */
+{ 565, 2}, {20287, 7}, {11381, 6}, {25539, 7}, /* 43 ~ 46 dB */
+{ 1791, 3}, { 4019, 4}, { 9019, 5}, {20239, 6}, /* 47 ~ 50 dB */
+{ 5677, 4}, {25479, 6}, { 7147, 4}, { 8019, 4}, /* 51 ~ 54 dB */
+{17995, 5}, {20191, 5}, {11327, 4}, {12709, 4}, /* 55 ~ 58 dB */
+{ 3565, 2}, { 1000, 0}, { 1122, 0}, { 1259, 0}, /* 59 ~ 62 dB */
+{ 2825, 1}, {12679, 3}, { 7113, 2}, { 7981, 2}, /* 63 ~ 66 dB */
+{ 8955, 2}, {20095, 3}, {22547, 3}, {12649, 2}, /* 67 ~ 70 dB */
+{28385, 3}, { 3981, 0}, {17867, 2}, {20047, 2}, /* 71 ~ 74 dB */
+{11247, 1}, {12619, 1}, {14159, 1}, {31773, 2}, /* 75 ~ 78 dB */
+{17825, 1}, {10000, 0}, {11220, 0}, {12589, 0}, /* 79 ~ 82 dB */
+{28251, 1}, {15849, 0}, {17783, 0}, {19953, 0}, /* 83 ~ 86 dB */
+{22387, 0}, {25119, 0}, {28184, 0}, {31623, 0}, /* 87 ~ 90 dB */
+};
+
+static const DECLARE_TLV_DB_RANGE(mic_gain_tlv,
+ 0, 1, TLV_DB_SCALE_ITEM(-9000, 600, 0),
+ 2, 5, TLV_DB_SCALE_ITEM(-8100, 300, 0),
+ 6, 7, TLV_DB_SCALE_ITEM(-7000, 200, 0),
+ 8, ARRAY_SIZE(mic_gain_table)-1, TLV_DB_SCALE_ITEM(-6500, 100, 0),
+);
+
+static int pdmic_get_mic_volsw(struct snd_kcontrol *kcontrol,
+ struct snd_ctl_elem_value *ucontrol)
+{
+ struct snd_soc_component *component = snd_soc_kcontrol_component(kcontrol);
+ unsigned int dgain_val, scale_val;
+ int i;
+
+ dgain_val = (snd_soc_component_read(component, PDMIC_DSPR1) & PDMIC_DSPR1_DGAIN_MASK)
+ >> PDMIC_DSPR1_DGAIN_SHIFT;
+
+ scale_val = (snd_soc_component_read(component, PDMIC_DSPR0) & PDMIC_DSPR0_SCALE_MASK)
+ >> PDMIC_DSPR0_SCALE_SHIFT;
+
+ for (i = 0; i < ARRAY_SIZE(mic_gain_table); i++) {
+ if ((mic_gain_table[i].dgain == dgain_val) &&
+ (mic_gain_table[i].scale == scale_val))
+ ucontrol->value.integer.value[0] = i;
+ }
+
+ return 0;
+}
+
+static int pdmic_put_mic_volsw(struct snd_kcontrol *kcontrol,
+ struct snd_ctl_elem_value *ucontrol)
+{
+ struct soc_mixer_control *mc =
+ (struct soc_mixer_control *)kcontrol->private_value;
+ struct snd_soc_component *component = snd_soc_kcontrol_component(kcontrol);
+ int max = mc->max;
+ unsigned int val;
+ int ret;
+
+ val = ucontrol->value.integer.value[0];
+
+ if (val > max)
+ return -EINVAL;
+
+ ret = snd_soc_component_update_bits(component, PDMIC_DSPR1, PDMIC_DSPR1_DGAIN_MASK,
+ mic_gain_table[val].dgain << PDMIC_DSPR1_DGAIN_SHIFT);
+ if (ret < 0)
+ return ret;
+
+ ret = snd_soc_component_update_bits(component, PDMIC_DSPR0, PDMIC_DSPR0_SCALE_MASK,
+ mic_gain_table[val].scale << PDMIC_DSPR0_SCALE_SHIFT);
+ if (ret < 0)
+ return ret;
+
+ return 0;
+}
+
+static const struct snd_kcontrol_new atmel_pdmic_snd_controls[] = {
+SOC_SINGLE_EXT_TLV("Mic Capture Volume", PDMIC_DSPR1, PDMIC_DSPR1_DGAIN_SHIFT,
+ ARRAY_SIZE(mic_gain_table)-1, 0,
+ pdmic_get_mic_volsw, pdmic_put_mic_volsw, mic_gain_tlv),
+
+SOC_SINGLE("High Pass Filter Switch", PDMIC_DSPR0,
+ PDMIC_DSPR0_HPFBYP_SHIFT, 1, 1),
+
+SOC_SINGLE("SINCC Filter Switch", PDMIC_DSPR0, PDMIC_DSPR0_SINBYP_SHIFT, 1, 1),
+};
+
+static int atmel_pdmic_component_probe(struct snd_soc_component *component)
+{
+ struct snd_soc_card *card = snd_soc_component_get_drvdata(component);
+ struct atmel_pdmic *dd = snd_soc_card_get_drvdata(card);
+
+ snd_soc_component_update_bits(component, PDMIC_DSPR1, PDMIC_DSPR1_OFFSET_MASK,
+ (u32)(dd->pdata->mic_offset << PDMIC_DSPR1_OFFSET_SHIFT));
+
+ return 0;
+}
+
+#define PDMIC_MR_PRESCAL_MAX_VAL 127
+
+static int
+atmel_pdmic_cpu_dai_hw_params(struct snd_pcm_substream *substream,
+ struct snd_pcm_hw_params *params,
+ struct snd_soc_dai *cpu_dai)
+{
+ struct snd_soc_pcm_runtime *rtd = asoc_substream_to_rtd(substream);
+ struct atmel_pdmic *dd = snd_soc_card_get_drvdata(rtd->card);
+ struct snd_soc_component *component = cpu_dai->component;
+ unsigned int rate_min = substream->runtime->hw.rate_min;
+ unsigned int rate_max = substream->runtime->hw.rate_max;
+ int fs = params_rate(params);
+ int bits = params_width(params);
+ unsigned long pclk_rate, gclk_rate;
+ unsigned int f_pdmic;
+ u32 mr_val, dspr0_val, pclk_prescal, gclk_prescal;
+
+ if (params_channels(params) != 1) {
+ dev_err(component->dev,
+ "only supports one channel\n");
+ return -EINVAL;
+ }
+
+ if ((fs < rate_min) || (fs > rate_max)) {
+ dev_err(component->dev,
+ "sample rate is %dHz, min rate is %dHz, max rate is %dHz\n",
+ fs, rate_min, rate_max);
+
+ return -EINVAL;
+ }
+
+ switch (bits) {
+ case 16:
+ dspr0_val = (PDMIC_DSPR0_SIZE_16_BITS
+ << PDMIC_DSPR0_SIZE_SHIFT);
+ break;
+ case 32:
+ dspr0_val = (PDMIC_DSPR0_SIZE_32_BITS
+ << PDMIC_DSPR0_SIZE_SHIFT);
+ break;
+ default:
+ return -EINVAL;
+ }
+
+ if ((fs << 7) > (rate_max << 6)) {
+ f_pdmic = fs << 6;
+ dspr0_val |= PDMIC_DSPR0_OSR_64 << PDMIC_DSPR0_OSR_SHIFT;
+ } else {
+ f_pdmic = fs << 7;
+ dspr0_val |= PDMIC_DSPR0_OSR_128 << PDMIC_DSPR0_OSR_SHIFT;
+ }
+
+ pclk_rate = clk_get_rate(dd->pclk);
+ gclk_rate = clk_get_rate(dd->gclk);
+
+ /* PRESCAL = SELCK/(2*f_pdmic) - 1*/
+ pclk_prescal = (u32)(pclk_rate/(f_pdmic << 1)) - 1;
+ gclk_prescal = (u32)(gclk_rate/(f_pdmic << 1)) - 1;
+
+ if ((pclk_prescal > PDMIC_MR_PRESCAL_MAX_VAL) ||
+ (gclk_rate/((gclk_prescal + 1) << 1) <
+ pclk_rate/((pclk_prescal + 1) << 1))) {
+ mr_val = gclk_prescal << PDMIC_MR_PRESCAL_SHIFT;
+ mr_val |= PDMIC_MR_CLKS_GCK << PDMIC_MR_CLKS_SHIFT;
+ } else {
+ mr_val = pclk_prescal << PDMIC_MR_PRESCAL_SHIFT;
+ mr_val |= PDMIC_MR_CLKS_PCK << PDMIC_MR_CLKS_SHIFT;
+ }
+
+ snd_soc_component_update_bits(component, PDMIC_MR,
+ PDMIC_MR_PRESCAL_MASK | PDMIC_MR_CLKS_MASK, mr_val);
+
+ snd_soc_component_update_bits(component, PDMIC_DSPR0,
+ PDMIC_DSPR0_OSR_MASK | PDMIC_DSPR0_SIZE_MASK, dspr0_val);
+
+ return 0;
+}
+
+static int atmel_pdmic_cpu_dai_trigger(struct snd_pcm_substream *substream,
+ int cmd, struct snd_soc_dai *cpu_dai)
+{
+ struct snd_soc_component *component = cpu_dai->component;
+ u32 val;
+
+ switch (cmd) {
+ case SNDRV_PCM_TRIGGER_START:
+ case SNDRV_PCM_TRIGGER_RESUME:
+ case SNDRV_PCM_TRIGGER_PAUSE_RELEASE:
+ val = PDMIC_CR_ENPDM_EN << PDMIC_CR_ENPDM_SHIFT;
+ break;
+ case SNDRV_PCM_TRIGGER_STOP:
+ case SNDRV_PCM_TRIGGER_SUSPEND:
+ case SNDRV_PCM_TRIGGER_PAUSE_PUSH:
+ val = PDMIC_CR_ENPDM_DIS << PDMIC_CR_ENPDM_SHIFT;
+ break;
+ default:
+ return -EINVAL;
+ }
+
+ snd_soc_component_update_bits(component, PDMIC_CR, PDMIC_CR_ENPDM_MASK, val);
+
+ return 0;
+}
+
+static const struct snd_soc_dai_ops atmel_pdmic_cpu_dai_ops = {
+ .startup = atmel_pdmic_cpu_dai_startup,
+ .shutdown = atmel_pdmic_cpu_dai_shutdown,
+ .prepare = atmel_pdmic_cpu_dai_prepare,
+ .hw_params = atmel_pdmic_cpu_dai_hw_params,
+ .trigger = atmel_pdmic_cpu_dai_trigger,
+};
+
+
+static struct snd_soc_dai_driver atmel_pdmic_cpu_dai = {
+ .capture = {
+ .stream_name = "Capture",
+ .channels_min = 1,
+ .channels_max = 1,
+ .rates = SNDRV_PCM_RATE_KNOT,
+ .formats = ATMEL_PDMIC_FORMATS,
+ },
+ .ops = &atmel_pdmic_cpu_dai_ops,
+};
+
+static const struct snd_soc_component_driver atmel_pdmic_cpu_dai_component = {
+ .name = "atmel-pdmic",
+ .probe = atmel_pdmic_component_probe,
+ .controls = atmel_pdmic_snd_controls,
+ .num_controls = ARRAY_SIZE(atmel_pdmic_snd_controls),
+ .idle_bias_on = 1,
+ .use_pmdown_time = 1,
+ .legacy_dai_naming = 1,
+};
+
+/* ASoC sound card */
+static int atmel_pdmic_asoc_card_init(struct device *dev,
+ struct snd_soc_card *card)
+{
+ struct snd_soc_dai_link *dai_link;
+ struct atmel_pdmic *dd = snd_soc_card_get_drvdata(card);
+ struct snd_soc_dai_link_component *comp;
+
+ dai_link = devm_kzalloc(dev, sizeof(*dai_link), GFP_KERNEL);
+ if (!dai_link)
+ return -ENOMEM;
+
+ comp = devm_kzalloc(dev, 3 * sizeof(*comp), GFP_KERNEL);
+ if (!comp)
+ return -ENOMEM;
+
+ dai_link->cpus = &comp[0];
+ dai_link->codecs = &comp[1];
+ dai_link->platforms = &comp[2];
+
+ dai_link->num_cpus = 1;
+ dai_link->num_codecs = 1;
+ dai_link->num_platforms = 1;
+
+ dai_link->name = "PDMIC";
+ dai_link->stream_name = "PDMIC PCM";
+ dai_link->codecs->dai_name = "snd-soc-dummy-dai";
+ dai_link->cpus->dai_name = dev_name(dev);
+ dai_link->codecs->name = "snd-soc-dummy";
+ dai_link->platforms->name = dev_name(dev);
+
+ card->dai_link = dai_link;
+ card->num_links = 1;
+ card->name = dd->pdata->card_name;
+ card->dev = dev;
+
+ return 0;
+}
+
+static void atmel_pdmic_get_sample_rate(struct atmel_pdmic *dd,
+ unsigned int *rate_min, unsigned int *rate_max)
+{
+ u32 mic_min_freq = dd->pdata->mic_min_freq;
+ u32 mic_max_freq = dd->pdata->mic_max_freq;
+ u32 clk_max_rate = (u32)(clk_get_rate(dd->pclk) >> 1);
+ u32 clk_min_rate = (u32)(clk_get_rate(dd->gclk) >> 8);
+
+ if (mic_max_freq > clk_max_rate)
+ mic_max_freq = clk_max_rate;
+
+ if (mic_min_freq < clk_min_rate)
+ mic_min_freq = clk_min_rate;
+
+ *rate_min = DIV_ROUND_CLOSEST(mic_min_freq, 128);
+ *rate_max = mic_max_freq >> 6;
+}
+
+/* PDMIC interrupt handler */
+static irqreturn_t atmel_pdmic_interrupt(int irq, void *dev_id)
+{
+ struct atmel_pdmic *dd = (struct atmel_pdmic *)dev_id;
+ u32 pdmic_isr;
+ irqreturn_t ret = IRQ_NONE;
+
+ regmap_read(dd->regmap, PDMIC_ISR, &pdmic_isr);
+
+ if (pdmic_isr & PDMIC_ISR_OVRE) {
+ regmap_update_bits(dd->regmap, PDMIC_CR, PDMIC_CR_ENPDM_MASK,
+ PDMIC_CR_ENPDM_DIS << PDMIC_CR_ENPDM_SHIFT);
+
+ snd_pcm_stop_xrun(dd->substream);
+
+ ret = IRQ_HANDLED;
+ }
+
+ return ret;
+}
+
+/* regmap configuration */
+#define ATMEL_PDMIC_REG_MAX 0x124
+static const struct regmap_config atmel_pdmic_regmap_config = {
+ .reg_bits = 32,
+ .reg_stride = 4,
+ .val_bits = 32,
+ .max_register = ATMEL_PDMIC_REG_MAX,
+};
+
+static int atmel_pdmic_probe(struct platform_device *pdev)
+{
+ struct device *dev = &pdev->dev;
+ struct atmel_pdmic *dd;
+ struct resource *res;
+ void __iomem *io_base;
+ const struct atmel_pdmic_pdata *pdata;
+ struct snd_soc_card *card;
+ unsigned int rate_min, rate_max;
+ int ret;
+
+ pdata = atmel_pdmic_dt_init(dev);
+ if (IS_ERR(pdata))
+ return PTR_ERR(pdata);
+
+ dd = devm_kzalloc(dev, sizeof(*dd), GFP_KERNEL);
+ if (!dd)
+ return -ENOMEM;
+
+ dd->pdata = pdata;
+ dd->dev = dev;
+
+ dd->irq = platform_get_irq(pdev, 0);
+ if (dd->irq < 0)
+ return dd->irq;
+
+ 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->gclk)) {
+ ret = PTR_ERR(dd->gclk);
+ dev_err(dev, "failed to get GCK: %d\n", ret);
+ return ret;
+ }
+
+ /* The gclk clock frequency must always be three times
+ * lower than the pclk clock frequency
+ */
+ ret = clk_set_rate(dd->gclk, clk_get_rate(dd->pclk)/3);
+ if (ret) {
+ dev_err(dev, "failed to set GCK clock rate: %d\n", ret);
+ return ret;
+ }
+
+ io_base = devm_platform_get_and_ioremap_resource(pdev, 0, &res);
+ if (IS_ERR(io_base))
+ return PTR_ERR(io_base);
+
+ dd->phy_base = res->start;
+
+ dd->regmap = devm_regmap_init_mmio(dev, io_base,
+ &atmel_pdmic_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_request_irq(dev, dd->irq, atmel_pdmic_interrupt, 0,
+ "PDMIC", (void *)dd);
+ if (ret < 0) {
+ dev_err(dev, "can't register ISR for IRQ %u (ret=%i)\n",
+ dd->irq, ret);
+ return ret;
+ }
+
+ /* Get the minimal and maximal sample rate that the microphone supports */
+ atmel_pdmic_get_sample_rate(dd, &rate_min, &rate_max);
+
+ /* register cpu dai */
+ atmel_pdmic_cpu_dai.capture.rate_min = rate_min;
+ atmel_pdmic_cpu_dai.capture.rate_max = rate_max;
+ ret = devm_snd_soc_register_component(dev,
+ &atmel_pdmic_cpu_dai_component,
+ &atmel_pdmic_cpu_dai, 1);
+ if (ret) {
+ dev_err(dev, "could not register CPU DAI: %d\n", ret);
+ return ret;
+ }
+
+ /* register platform */
+ ret = devm_snd_dmaengine_pcm_register(dev,
+ &atmel_pdmic_dmaengine_pcm_config,
+ 0);
+ if (ret) {
+ dev_err(dev, "could not register platform: %d\n", ret);
+ return ret;
+ }
+
+ /* register sound card */
+ card = devm_kzalloc(dev, sizeof(*card), GFP_KERNEL);
+ if (!card) {
+ ret = -ENOMEM;
+ goto unregister_codec;
+ }
+
+ snd_soc_card_set_drvdata(card, dd);
+
+ ret = atmel_pdmic_asoc_card_init(dev, card);
+ if (ret) {
+ dev_err(dev, "failed to init sound card: %d\n", ret);
+ goto unregister_codec;
+ }
+
+ ret = devm_snd_soc_register_card(dev, card);
+ if (ret) {
+ dev_err(dev, "failed to register sound card: %d\n", ret);
+ goto unregister_codec;
+ }
+
+ return 0;
+
+unregister_codec:
+ return ret;
+}
+
+static int atmel_pdmic_remove(struct platform_device *pdev)
+{
+ return 0;
+}
+
+static struct platform_driver atmel_pdmic_driver = {
+ .driver = {
+ .name = "atmel-pdmic",
+ .of_match_table = of_match_ptr(atmel_pdmic_of_match),
+ .pm = &snd_soc_pm_ops,
+ },
+ .probe = atmel_pdmic_probe,
+ .remove = atmel_pdmic_remove,
+};
+module_platform_driver(atmel_pdmic_driver);
+
+MODULE_DESCRIPTION("Atmel PDMIC driver under ALSA SoC architecture");
+MODULE_AUTHOR("Songjun Wu <songjun.wu@atmel.com>");
+MODULE_LICENSE("GPL v2");
diff --git a/sound/soc/atmel/atmel-pdmic.h b/sound/soc/atmel/atmel-pdmic.h
new file mode 100644
index 000000000..1dd351871
--- /dev/null
+++ b/sound/soc/atmel/atmel-pdmic.h
@@ -0,0 +1,81 @@
+/* SPDX-License-Identifier: GPL-2.0 */
+#ifndef __ATMEL_PDMIC_H_
+#define __ATMEL_PDMIC_H_
+
+#include <linux/bitops.h>
+
+#define PDMIC_CR 0x00000000
+
+#define PDMIC_CR_SWRST 0x1
+#define PDMIC_CR_SWRST_MASK BIT(0)
+#define PDMIC_CR_SWRST_SHIFT (0)
+
+#define PDMIC_CR_ENPDM_DIS 0x0
+#define PDMIC_CR_ENPDM_EN 0x1
+#define PDMIC_CR_ENPDM_MASK BIT(4)
+#define PDMIC_CR_ENPDM_SHIFT (4)
+
+#define PDMIC_MR 0x00000004
+
+#define PDMIC_MR_CLKS_PCK 0x0
+#define PDMIC_MR_CLKS_GCK 0x1
+#define PDMIC_MR_CLKS_MASK BIT(4)
+#define PDMIC_MR_CLKS_SHIFT (4)
+
+#define PDMIC_MR_PRESCAL_MASK GENMASK(14, 8)
+#define PDMIC_MR_PRESCAL_SHIFT (8)
+
+#define PDMIC_CDR 0x00000014
+
+#define PDMIC_IER 0x00000018
+#define PDMIC_IER_OVRE BIT(25)
+
+#define PDMIC_IDR 0x0000001c
+#define PDMIC_IDR_OVRE BIT(25)
+
+#define PDMIC_IMR 0x00000020
+
+#define PDMIC_ISR 0x00000024
+#define PDMIC_ISR_OVRE BIT(25)
+
+#define PDMIC_DSPR0 0x00000058
+
+#define PDMIC_DSPR0_HPFBYP_DIS 0x1
+#define PDMIC_DSPR0_HPFBYP_EN 0x0
+#define PDMIC_DSPR0_HPFBYP_MASK BIT(1)
+#define PDMIC_DSPR0_HPFBYP_SHIFT (1)
+
+#define PDMIC_DSPR0_SINBYP_DIS 0x1
+#define PDMIC_DSPR0_SINBYP_EN 0x0
+#define PDMIC_DSPR0_SINBYP_MASK BIT(2)
+#define PDMIC_DSPR0_SINBYP_SHIFT (2)
+
+#define PDMIC_DSPR0_SIZE_16_BITS 0x0
+#define PDMIC_DSPR0_SIZE_32_BITS 0x1
+#define PDMIC_DSPR0_SIZE_MASK BIT(3)
+#define PDMIC_DSPR0_SIZE_SHIFT (3)
+
+#define PDMIC_DSPR0_OSR_128 0x0
+#define PDMIC_DSPR0_OSR_64 0x1
+#define PDMIC_DSPR0_OSR_MASK GENMASK(6, 4)
+#define PDMIC_DSPR0_OSR_SHIFT (4)
+
+#define PDMIC_DSPR0_SCALE_MASK GENMASK(11, 8)
+#define PDMIC_DSPR0_SCALE_SHIFT (8)
+
+#define PDMIC_DSPR0_SHIFT_MASK GENMASK(15, 12)
+#define PDMIC_DSPR0_SHIFT_SHIFT (12)
+
+#define PDMIC_DSPR1 0x0000005c
+
+#define PDMIC_DSPR1_DGAIN_MASK GENMASK(14, 0)
+#define PDMIC_DSPR1_DGAIN_SHIFT (0)
+
+#define PDMIC_DSPR1_OFFSET_MASK GENMASK(31, 16)
+#define PDMIC_DSPR1_OFFSET_SHIFT (16)
+
+#define PDMIC_WPMR 0x000000e4
+
+#define PDMIC_WPSR 0x000000e8
+
+#endif
diff --git a/sound/soc/atmel/atmel_ssc_dai.c b/sound/soc/atmel/atmel_ssc_dai.c
new file mode 100644
index 000000000..376345443
--- /dev/null
+++ b/sound/soc/atmel/atmel_ssc_dai.c
@@ -0,0 +1,920 @@
+// SPDX-License-Identifier: GPL-2.0-or-later
+/*
+ * atmel_ssc_dai.c -- ALSA SoC ATMEL SSC Audio Layer Platform driver
+ *
+ * Copyright (C) 2005 SAN People
+ * Copyright (C) 2008 Atmel
+ *
+ * Author: Sedji Gaouaou <sedji.gaouaou@atmel.com>
+ * ATMEL CORP.
+ *
+ * Based on at91-ssc.c by
+ * Frank Mandarino <fmandarino@endrelia.com>
+ * Based on pxa2xx Platform drivers by
+ * Liam Girdwood <lrg@slimlogic.co.uk>
+ */
+
+#include <linux/init.h>
+#include <linux/module.h>
+#include <linux/interrupt.h>
+#include <linux/device.h>
+#include <linux/delay.h>
+#include <linux/clk.h>
+#include <linux/atmel_pdc.h>
+
+#include <linux/atmel-ssc.h>
+#include <sound/core.h>
+#include <sound/pcm.h>
+#include <sound/pcm_params.h>
+#include <sound/initval.h>
+#include <sound/soc.h>
+
+#include "atmel-pcm.h"
+#include "atmel_ssc_dai.h"
+
+
+#define NUM_SSC_DEVICES 3
+
+/*
+ * SSC PDC registers required by the PCM DMA engine.
+ */
+static struct atmel_pdc_regs pdc_tx_reg = {
+ .xpr = ATMEL_PDC_TPR,
+ .xcr = ATMEL_PDC_TCR,
+ .xnpr = ATMEL_PDC_TNPR,
+ .xncr = ATMEL_PDC_TNCR,
+};
+
+static struct atmel_pdc_regs pdc_rx_reg = {
+ .xpr = ATMEL_PDC_RPR,
+ .xcr = ATMEL_PDC_RCR,
+ .xnpr = ATMEL_PDC_RNPR,
+ .xncr = ATMEL_PDC_RNCR,
+};
+
+/*
+ * SSC & PDC status bits for transmit and receive.
+ */
+static struct atmel_ssc_mask ssc_tx_mask = {
+ .ssc_enable = SSC_BIT(CR_TXEN),
+ .ssc_disable = SSC_BIT(CR_TXDIS),
+ .ssc_endx = SSC_BIT(SR_ENDTX),
+ .ssc_endbuf = SSC_BIT(SR_TXBUFE),
+ .ssc_error = SSC_BIT(SR_OVRUN),
+ .pdc_enable = ATMEL_PDC_TXTEN,
+ .pdc_disable = ATMEL_PDC_TXTDIS,
+};
+
+static struct atmel_ssc_mask ssc_rx_mask = {
+ .ssc_enable = SSC_BIT(CR_RXEN),
+ .ssc_disable = SSC_BIT(CR_RXDIS),
+ .ssc_endx = SSC_BIT(SR_ENDRX),
+ .ssc_endbuf = SSC_BIT(SR_RXBUFF),
+ .ssc_error = SSC_BIT(SR_OVRUN),
+ .pdc_enable = ATMEL_PDC_RXTEN,
+ .pdc_disable = ATMEL_PDC_RXTDIS,
+};
+
+
+/*
+ * DMA parameters.
+ */
+static struct atmel_pcm_dma_params ssc_dma_params[NUM_SSC_DEVICES][2] = {
+ {{
+ .name = "SSC0 PCM out",
+ .pdc = &pdc_tx_reg,
+ .mask = &ssc_tx_mask,
+ },
+ {
+ .name = "SSC0 PCM in",
+ .pdc = &pdc_rx_reg,
+ .mask = &ssc_rx_mask,
+ } },
+ {{
+ .name = "SSC1 PCM out",
+ .pdc = &pdc_tx_reg,
+ .mask = &ssc_tx_mask,
+ },
+ {
+ .name = "SSC1 PCM in",
+ .pdc = &pdc_rx_reg,
+ .mask = &ssc_rx_mask,
+ } },
+ {{
+ .name = "SSC2 PCM out",
+ .pdc = &pdc_tx_reg,
+ .mask = &ssc_tx_mask,
+ },
+ {
+ .name = "SSC2 PCM in",
+ .pdc = &pdc_rx_reg,
+ .mask = &ssc_rx_mask,
+ } },
+};
+
+
+static struct atmel_ssc_info ssc_info[NUM_SSC_DEVICES] = {
+ {
+ .name = "ssc0",
+ .dir_mask = SSC_DIR_MASK_UNUSED,
+ .initialized = 0,
+ },
+ {
+ .name = "ssc1",
+ .dir_mask = SSC_DIR_MASK_UNUSED,
+ .initialized = 0,
+ },
+ {
+ .name = "ssc2",
+ .dir_mask = SSC_DIR_MASK_UNUSED,
+ .initialized = 0,
+ },
+};
+
+
+/*
+ * SSC interrupt handler. Passes PDC interrupts to the DMA
+ * interrupt handler in the PCM driver.
+ */
+static irqreturn_t atmel_ssc_interrupt(int irq, void *dev_id)
+{
+ struct atmel_ssc_info *ssc_p = dev_id;
+ struct atmel_pcm_dma_params *dma_params;
+ u32 ssc_sr;
+ u32 ssc_substream_mask;
+ int i;
+
+ ssc_sr = (unsigned long)ssc_readl(ssc_p->ssc->regs, SR)
+ & (unsigned long)ssc_readl(ssc_p->ssc->regs, IMR);
+
+ /*
+ * Loop through the substreams attached to this SSC. If
+ * a DMA-related interrupt occurred on that substream, call
+ * the DMA interrupt handler function, if one has been
+ * registered in the dma_params structure by the PCM driver.
+ */
+ for (i = 0; i < ARRAY_SIZE(ssc_p->dma_params); i++) {
+ dma_params = ssc_p->dma_params[i];
+
+ if ((dma_params != NULL) &&
+ (dma_params->dma_intr_handler != NULL)) {
+ ssc_substream_mask = (dma_params->mask->ssc_endx |
+ dma_params->mask->ssc_endbuf);
+ if (ssc_sr & ssc_substream_mask) {
+ dma_params->dma_intr_handler(ssc_sr,
+ dma_params->
+ substream);
+ }
+ }
+ }
+
+ return IRQ_HANDLED;
+}
+
+/*
+ * When the bit clock is input, limit the maximum rate according to the
+ * Serial Clock Ratio Considerations section from the SSC documentation:
+ *
+ * The Transmitter and the Receiver can be programmed to operate
+ * with the clock signals provided on either the TK or RK pins.
+ * This allows the SSC to support many slave-mode data transfers.
+ * In this case, the maximum clock speed allowed on the RK pin is:
+ * - Peripheral clock divided by 2 if Receiver Frame Synchro is input
+ * - Peripheral clock divided by 3 if Receiver Frame Synchro is output
+ * In addition, the maximum clock speed allowed on the TK pin is:
+ * - Peripheral clock divided by 6 if Transmit Frame Synchro is input
+ * - Peripheral clock divided by 2 if Transmit Frame Synchro is output
+ *
+ * When the bit clock is output, limit the rate according to the
+ * SSC divider restrictions.
+ */
+static int atmel_ssc_hw_rule_rate(struct snd_pcm_hw_params *params,
+ struct snd_pcm_hw_rule *rule)
+{
+ struct atmel_ssc_info *ssc_p = rule->private;
+ struct ssc_device *ssc = ssc_p->ssc;
+ struct snd_interval *i = hw_param_interval(params, rule->var);
+ struct snd_interval t;
+ struct snd_ratnum r = {
+ .den_min = 1,
+ .den_max = 4095,
+ .den_step = 1,
+ };
+ unsigned int num = 0, den = 0;
+ int frame_size;
+ int mck_div = 2;
+ int ret;
+
+ frame_size = snd_soc_params_to_frame_size(params);
+ if (frame_size < 0)
+ return frame_size;
+
+ switch (ssc_p->daifmt & SND_SOC_DAIFMT_CLOCK_PROVIDER_MASK) {
+ case SND_SOC_DAIFMT_BC_FP:
+ if ((ssc_p->dir_mask & SSC_DIR_MASK_CAPTURE)
+ && ssc->clk_from_rk_pin)
+ /* Receiver Frame Synchro (i.e. capture)
+ * is output (format is _CFS) and the RK pin
+ * is used for input (format is _CBM_).
+ */
+ mck_div = 3;
+ break;
+
+ case SND_SOC_DAIFMT_BC_FC:
+ if ((ssc_p->dir_mask & SSC_DIR_MASK_PLAYBACK)
+ && !ssc->clk_from_rk_pin)
+ /* Transmit Frame Synchro (i.e. playback)
+ * is input (format is _CFM) and the TK pin
+ * is used for input (format _CBM_ but not
+ * using the RK pin).
+ */
+ mck_div = 6;
+ break;
+ }
+
+ switch (ssc_p->daifmt & SND_SOC_DAIFMT_CLOCK_PROVIDER_MASK) {
+ case SND_SOC_DAIFMT_BP_FP:
+ r.num = ssc_p->mck_rate / mck_div / frame_size;
+
+ ret = snd_interval_ratnum(i, 1, &r, &num, &den);
+ if (ret >= 0 && den && rule->var == SNDRV_PCM_HW_PARAM_RATE) {
+ params->rate_num = num;
+ params->rate_den = den;
+ }
+ break;
+
+ case SND_SOC_DAIFMT_BC_FP:
+ case SND_SOC_DAIFMT_BC_FC:
+ t.min = 8000;
+ t.max = ssc_p->mck_rate / mck_div / frame_size;
+ t.openmin = t.openmax = 0;
+ t.integer = 0;
+ ret = snd_interval_refine(i, &t);
+ break;
+
+ default:
+ ret = -EINVAL;
+ break;
+ }
+
+ return ret;
+}
+
+/*-------------------------------------------------------------------------*\
+ * DAI functions
+\*-------------------------------------------------------------------------*/
+/*
+ * Startup. Only that one substream allowed in each direction.
+ */
+static int atmel_ssc_startup(struct snd_pcm_substream *substream,
+ struct snd_soc_dai *dai)
+{
+ struct platform_device *pdev = to_platform_device(dai->dev);
+ struct atmel_ssc_info *ssc_p = &ssc_info[pdev->id];
+ struct atmel_pcm_dma_params *dma_params;
+ int dir, dir_mask;
+ int ret;
+
+ pr_debug("atmel_ssc_startup: SSC_SR=0x%x\n",
+ ssc_readl(ssc_p->ssc->regs, SR));
+
+ /* Enable PMC peripheral clock for this SSC */
+ pr_debug("atmel_ssc_dai: Starting clock\n");
+ ret = clk_enable(ssc_p->ssc->clk);
+ if (ret)
+ return ret;
+
+ ssc_p->mck_rate = clk_get_rate(ssc_p->ssc->clk);
+
+ /* Reset the SSC unless initialized to keep it in a clean state */
+ if (!ssc_p->initialized)
+ ssc_writel(ssc_p->ssc->regs, CR, SSC_BIT(CR_SWRST));
+
+ if (substream->stream == SNDRV_PCM_STREAM_PLAYBACK) {
+ dir = 0;
+ dir_mask = SSC_DIR_MASK_PLAYBACK;
+ } else {
+ dir = 1;
+ dir_mask = SSC_DIR_MASK_CAPTURE;
+ }
+
+ ret = snd_pcm_hw_rule_add(substream->runtime, 0,
+ SNDRV_PCM_HW_PARAM_RATE,
+ atmel_ssc_hw_rule_rate,
+ ssc_p,
+ SNDRV_PCM_HW_PARAM_FRAME_BITS,
+ SNDRV_PCM_HW_PARAM_CHANNELS, -1);
+ if (ret < 0) {
+ dev_err(dai->dev, "Failed to specify rate rule: %d\n", ret);
+ return ret;
+ }
+
+ dma_params = &ssc_dma_params[pdev->id][dir];
+ dma_params->ssc = ssc_p->ssc;
+ dma_params->substream = substream;
+
+ ssc_p->dma_params[dir] = dma_params;
+
+ snd_soc_dai_set_dma_data(dai, substream, dma_params);
+
+ if (ssc_p->dir_mask & dir_mask)
+ return -EBUSY;
+
+ ssc_p->dir_mask |= dir_mask;
+
+ return 0;
+}
+
+/*
+ * Shutdown. Clear DMA parameters and shutdown the SSC if there
+ * are no other substreams open.
+ */
+static void atmel_ssc_shutdown(struct snd_pcm_substream *substream,
+ struct snd_soc_dai *dai)
+{
+ struct platform_device *pdev = to_platform_device(dai->dev);
+ struct atmel_ssc_info *ssc_p = &ssc_info[pdev->id];
+ struct atmel_pcm_dma_params *dma_params;
+ int dir, dir_mask;
+
+ if (substream->stream == SNDRV_PCM_STREAM_PLAYBACK)
+ dir = 0;
+ else
+ dir = 1;
+
+ dma_params = ssc_p->dma_params[dir];
+
+ if (dma_params != NULL) {
+ dma_params->ssc = NULL;
+ dma_params->substream = NULL;
+ ssc_p->dma_params[dir] = NULL;
+ }
+
+ dir_mask = 1 << dir;
+
+ ssc_p->dir_mask &= ~dir_mask;
+ if (!ssc_p->dir_mask) {
+ if (ssc_p->initialized) {
+ free_irq(ssc_p->ssc->irq, ssc_p);
+ ssc_p->initialized = 0;
+ }
+
+ /* Reset the SSC */
+ ssc_writel(ssc_p->ssc->regs, CR, SSC_BIT(CR_SWRST));
+ /* Clear the SSC dividers */
+ ssc_p->cmr_div = ssc_p->tcmr_period = ssc_p->rcmr_period = 0;
+ ssc_p->forced_divider = 0;
+ }
+
+ /* Shutdown the SSC clock. */
+ pr_debug("atmel_ssc_dai: Stopping clock\n");
+ clk_disable(ssc_p->ssc->clk);
+}
+
+
+/*
+ * Record the DAI format for use in hw_params().
+ */
+static int atmel_ssc_set_dai_fmt(struct snd_soc_dai *cpu_dai,
+ unsigned int fmt)
+{
+ struct platform_device *pdev = to_platform_device(cpu_dai->dev);
+ struct atmel_ssc_info *ssc_p = &ssc_info[pdev->id];
+
+ ssc_p->daifmt = fmt;
+ return 0;
+}
+
+/*
+ * Record SSC clock dividers for use in hw_params().
+ */
+static int atmel_ssc_set_dai_clkdiv(struct snd_soc_dai *cpu_dai,
+ int div_id, int div)
+{
+ struct platform_device *pdev = to_platform_device(cpu_dai->dev);
+ struct atmel_ssc_info *ssc_p = &ssc_info[pdev->id];
+
+ switch (div_id) {
+ case ATMEL_SSC_CMR_DIV:
+ /*
+ * The same master clock divider is used for both
+ * transmit and receive, so if a value has already
+ * been set, it must match this value.
+ */
+ if (ssc_p->dir_mask !=
+ (SSC_DIR_MASK_PLAYBACK | SSC_DIR_MASK_CAPTURE))
+ ssc_p->cmr_div = div;
+ else if (ssc_p->cmr_div == 0)
+ ssc_p->cmr_div = div;
+ else
+ if (div != ssc_p->cmr_div)
+ return -EBUSY;
+ ssc_p->forced_divider |= BIT(ATMEL_SSC_CMR_DIV);
+ break;
+
+ case ATMEL_SSC_TCMR_PERIOD:
+ ssc_p->tcmr_period = div;
+ ssc_p->forced_divider |= BIT(ATMEL_SSC_TCMR_PERIOD);
+ break;
+
+ case ATMEL_SSC_RCMR_PERIOD:
+ ssc_p->rcmr_period = div;
+ ssc_p->forced_divider |= BIT(ATMEL_SSC_RCMR_PERIOD);
+ break;
+
+ default:
+ return -EINVAL;
+ }
+
+ return 0;
+}
+
+/* Is the cpu-dai master of the frame clock? */
+static int atmel_ssc_cfs(struct atmel_ssc_info *ssc_p)
+{
+ switch (ssc_p->daifmt & SND_SOC_DAIFMT_CLOCK_PROVIDER_MASK) {
+ case SND_SOC_DAIFMT_BC_FP:
+ case SND_SOC_DAIFMT_BP_FP:
+ return 1;
+ }
+ return 0;
+}
+
+/* Is the cpu-dai master of the bit clock? */
+static int atmel_ssc_cbs(struct atmel_ssc_info *ssc_p)
+{
+ switch (ssc_p->daifmt & SND_SOC_DAIFMT_CLOCK_PROVIDER_MASK) {
+ case SND_SOC_DAIFMT_BP_FC:
+ case SND_SOC_DAIFMT_BP_FP:
+ return 1;
+ }
+ return 0;
+}
+
+/*
+ * Configure the SSC.
+ */
+static int atmel_ssc_hw_params(struct snd_pcm_substream *substream,
+ struct snd_pcm_hw_params *params,
+ struct snd_soc_dai *dai)
+{
+ struct platform_device *pdev = to_platform_device(dai->dev);
+ int id = pdev->id;
+ struct atmel_ssc_info *ssc_p = &ssc_info[id];
+ struct ssc_device *ssc = ssc_p->ssc;
+ struct atmel_pcm_dma_params *dma_params;
+ int dir, channels, bits;
+ u32 tfmr, rfmr, tcmr, rcmr;
+ int ret;
+ int fslen, fslen_ext, fs_osync, fs_edge;
+ u32 cmr_div;
+ u32 tcmr_period;
+ u32 rcmr_period;
+
+ /*
+ * Currently, there is only one set of dma params for
+ * each direction. If more are added, this code will
+ * have to be changed to select the proper set.
+ */
+ if (substream->stream == SNDRV_PCM_STREAM_PLAYBACK)
+ dir = 0;
+ else
+ dir = 1;
+
+ /*
+ * If the cpu dai should provide BCLK, but noone has provided the
+ * divider needed for that to work, fall back to something sensible.
+ */
+ cmr_div = ssc_p->cmr_div;
+ if (!(ssc_p->forced_divider & BIT(ATMEL_SSC_CMR_DIV)) &&
+ atmel_ssc_cbs(ssc_p)) {
+ int bclk_rate = snd_soc_params_to_bclk(params);
+
+ if (bclk_rate < 0) {
+ dev_err(dai->dev, "unable to calculate cmr_div: %d\n",
+ bclk_rate);
+ return bclk_rate;
+ }
+
+ cmr_div = DIV_ROUND_CLOSEST(ssc_p->mck_rate, 2 * bclk_rate);
+ }
+
+ /*
+ * If the cpu dai should provide LRCLK, but noone has provided the
+ * dividers needed for that to work, fall back to something sensible.
+ */
+ tcmr_period = ssc_p->tcmr_period;
+ rcmr_period = ssc_p->rcmr_period;
+ if (atmel_ssc_cfs(ssc_p)) {
+ int frame_size = snd_soc_params_to_frame_size(params);
+
+ if (frame_size < 0) {
+ dev_err(dai->dev,
+ "unable to calculate tx/rx cmr_period: %d\n",
+ frame_size);
+ return frame_size;
+ }
+
+ if (!(ssc_p->forced_divider & BIT(ATMEL_SSC_TCMR_PERIOD)))
+ tcmr_period = frame_size / 2 - 1;
+ if (!(ssc_p->forced_divider & BIT(ATMEL_SSC_RCMR_PERIOD)))
+ rcmr_period = frame_size / 2 - 1;
+ }
+
+ dma_params = ssc_p->dma_params[dir];
+
+ channels = params_channels(params);
+
+ /*
+ * Determine sample size in bits and the PDC increment.
+ */
+ switch (params_format(params)) {
+ case SNDRV_PCM_FORMAT_S8:
+ bits = 8;
+ dma_params->pdc_xfer_size = 1;
+ break;
+ case SNDRV_PCM_FORMAT_S16_LE:
+ bits = 16;
+ dma_params->pdc_xfer_size = 2;
+ break;
+ case SNDRV_PCM_FORMAT_S24_LE:
+ bits = 24;
+ dma_params->pdc_xfer_size = 4;
+ break;
+ case SNDRV_PCM_FORMAT_S32_LE:
+ bits = 32;
+ dma_params->pdc_xfer_size = 4;
+ break;
+ default:
+ printk(KERN_WARNING "atmel_ssc_dai: unsupported PCM format");
+ return -EINVAL;
+ }
+
+ /*
+ * Compute SSC register settings.
+ */
+
+ fslen_ext = (bits - 1) / 16;
+ fslen = (bits - 1) % 16;
+
+ switch (ssc_p->daifmt & SND_SOC_DAIFMT_FORMAT_MASK) {
+
+ case SND_SOC_DAIFMT_LEFT_J:
+ fs_osync = SSC_FSOS_POSITIVE;
+ fs_edge = SSC_START_RISING_RF;
+
+ rcmr = SSC_BF(RCMR_STTDLY, 0);
+ tcmr = SSC_BF(TCMR_STTDLY, 0);
+
+ break;
+
+ case SND_SOC_DAIFMT_I2S:
+ fs_osync = SSC_FSOS_NEGATIVE;
+ fs_edge = SSC_START_FALLING_RF;
+
+ rcmr = SSC_BF(RCMR_STTDLY, 1);
+ tcmr = SSC_BF(TCMR_STTDLY, 1);
+
+ break;
+
+ case SND_SOC_DAIFMT_DSP_A:
+ /*
+ * DSP/PCM Mode A format
+ *
+ * Data is transferred on first BCLK after LRC pulse rising
+ * edge.If stereo, the right channel data is contiguous with
+ * the left channel data.
+ */
+ fs_osync = SSC_FSOS_POSITIVE;
+ fs_edge = SSC_START_RISING_RF;
+ fslen = fslen_ext = 0;
+
+ rcmr = SSC_BF(RCMR_STTDLY, 1);
+ tcmr = SSC_BF(TCMR_STTDLY, 1);
+
+ break;
+
+ default:
+ printk(KERN_WARNING "atmel_ssc_dai: unsupported DAI format 0x%x\n",
+ ssc_p->daifmt);
+ return -EINVAL;
+ }
+
+ if (!atmel_ssc_cfs(ssc_p)) {
+ fslen = fslen_ext = 0;
+ rcmr_period = tcmr_period = 0;
+ fs_osync = SSC_FSOS_NONE;
+ }
+
+ rcmr |= SSC_BF(RCMR_START, fs_edge);
+ tcmr |= SSC_BF(TCMR_START, fs_edge);
+
+ if (atmel_ssc_cbs(ssc_p)) {
+ /*
+ * SSC provides BCLK
+ *
+ * The SSC transmit and receive clocks are generated from the
+ * MCK divider, and the BCLK signal is output
+ * on the SSC TK line.
+ */
+ rcmr |= SSC_BF(RCMR_CKS, SSC_CKS_DIV)
+ | SSC_BF(RCMR_CKO, SSC_CKO_NONE);
+
+ tcmr |= SSC_BF(TCMR_CKS, SSC_CKS_DIV)
+ | SSC_BF(TCMR_CKO, SSC_CKO_CONTINUOUS);
+ } else {
+ rcmr |= SSC_BF(RCMR_CKS, ssc->clk_from_rk_pin ?
+ SSC_CKS_PIN : SSC_CKS_CLOCK)
+ | SSC_BF(RCMR_CKO, SSC_CKO_NONE);
+
+ tcmr |= SSC_BF(TCMR_CKS, ssc->clk_from_rk_pin ?
+ SSC_CKS_CLOCK : SSC_CKS_PIN)
+ | SSC_BF(TCMR_CKO, SSC_CKO_NONE);
+ }
+
+ rcmr |= SSC_BF(RCMR_PERIOD, rcmr_period)
+ | SSC_BF(RCMR_CKI, SSC_CKI_RISING);
+
+ tcmr |= SSC_BF(TCMR_PERIOD, tcmr_period)
+ | SSC_BF(TCMR_CKI, SSC_CKI_FALLING);
+
+ rfmr = SSC_BF(RFMR_FSLEN_EXT, fslen_ext)
+ | SSC_BF(RFMR_FSEDGE, SSC_FSEDGE_POSITIVE)
+ | SSC_BF(RFMR_FSOS, fs_osync)
+ | SSC_BF(RFMR_FSLEN, fslen)
+ | SSC_BF(RFMR_DATNB, (channels - 1))
+ | SSC_BIT(RFMR_MSBF)
+ | SSC_BF(RFMR_LOOP, 0)
+ | SSC_BF(RFMR_DATLEN, (bits - 1));
+
+ tfmr = SSC_BF(TFMR_FSLEN_EXT, fslen_ext)
+ | SSC_BF(TFMR_FSEDGE, SSC_FSEDGE_POSITIVE)
+ | SSC_BF(TFMR_FSDEN, 0)
+ | SSC_BF(TFMR_FSOS, fs_osync)
+ | SSC_BF(TFMR_FSLEN, fslen)
+ | SSC_BF(TFMR_DATNB, (channels - 1))
+ | SSC_BIT(TFMR_MSBF)
+ | SSC_BF(TFMR_DATDEF, 0)
+ | SSC_BF(TFMR_DATLEN, (bits - 1));
+
+ if (fslen_ext && !ssc->pdata->has_fslen_ext) {
+ dev_err(dai->dev, "sample size %d is too large for SSC device\n",
+ bits);
+ return -EINVAL;
+ }
+
+ pr_debug("atmel_ssc_hw_params: "
+ "RCMR=%08x RFMR=%08x TCMR=%08x TFMR=%08x\n",
+ rcmr, rfmr, tcmr, tfmr);
+
+ if (!ssc_p->initialized) {
+ if (!ssc_p->ssc->pdata->use_dma) {
+ ssc_writel(ssc_p->ssc->regs, PDC_RPR, 0);
+ ssc_writel(ssc_p->ssc->regs, PDC_RCR, 0);
+ ssc_writel(ssc_p->ssc->regs, PDC_RNPR, 0);
+ ssc_writel(ssc_p->ssc->regs, PDC_RNCR, 0);
+
+ ssc_writel(ssc_p->ssc->regs, PDC_TPR, 0);
+ ssc_writel(ssc_p->ssc->regs, PDC_TCR, 0);
+ ssc_writel(ssc_p->ssc->regs, PDC_TNPR, 0);
+ ssc_writel(ssc_p->ssc->regs, PDC_TNCR, 0);
+ }
+
+ ret = request_irq(ssc_p->ssc->irq, atmel_ssc_interrupt, 0,
+ ssc_p->name, ssc_p);
+ if (ret < 0) {
+ printk(KERN_WARNING
+ "atmel_ssc_dai: request_irq failure\n");
+ pr_debug("Atmel_ssc_dai: Stopping clock\n");
+ clk_disable(ssc_p->ssc->clk);
+ return ret;
+ }
+
+ ssc_p->initialized = 1;
+ }
+
+ /* set SSC clock mode register */
+ ssc_writel(ssc_p->ssc->regs, CMR, cmr_div);
+
+ /* set receive clock mode and format */
+ ssc_writel(ssc_p->ssc->regs, RCMR, rcmr);
+ ssc_writel(ssc_p->ssc->regs, RFMR, rfmr);
+
+ /* set transmit clock mode and format */
+ ssc_writel(ssc_p->ssc->regs, TCMR, tcmr);
+ ssc_writel(ssc_p->ssc->regs, TFMR, tfmr);
+
+ pr_debug("atmel_ssc_dai,hw_params: SSC initialized\n");
+ return 0;
+}
+
+
+static int atmel_ssc_prepare(struct snd_pcm_substream *substream,
+ struct snd_soc_dai *dai)
+{
+ struct platform_device *pdev = to_platform_device(dai->dev);
+ struct atmel_ssc_info *ssc_p = &ssc_info[pdev->id];
+ struct atmel_pcm_dma_params *dma_params;
+ int dir;
+
+ if (substream->stream == SNDRV_PCM_STREAM_PLAYBACK)
+ dir = 0;
+ else
+ dir = 1;
+
+ dma_params = ssc_p->dma_params[dir];
+
+ ssc_writel(ssc_p->ssc->regs, CR, dma_params->mask->ssc_disable);
+ ssc_writel(ssc_p->ssc->regs, IDR, dma_params->mask->ssc_error);
+
+ pr_debug("%s enabled SSC_SR=0x%08x\n",
+ dir ? "receive" : "transmit",
+ ssc_readl(ssc_p->ssc->regs, SR));
+ return 0;
+}
+
+static int atmel_ssc_trigger(struct snd_pcm_substream *substream,
+ int cmd, struct snd_soc_dai *dai)
+{
+ struct platform_device *pdev = to_platform_device(dai->dev);
+ struct atmel_ssc_info *ssc_p = &ssc_info[pdev->id];
+ struct atmel_pcm_dma_params *dma_params;
+ int dir;
+
+ if (substream->stream == SNDRV_PCM_STREAM_PLAYBACK)
+ dir = 0;
+ else
+ dir = 1;
+
+ dma_params = ssc_p->dma_params[dir];
+
+ switch (cmd) {
+ case SNDRV_PCM_TRIGGER_START:
+ case SNDRV_PCM_TRIGGER_RESUME:
+ case SNDRV_PCM_TRIGGER_PAUSE_RELEASE:
+ ssc_writel(ssc_p->ssc->regs, CR, dma_params->mask->ssc_enable);
+ break;
+ default:
+ ssc_writel(ssc_p->ssc->regs, CR, dma_params->mask->ssc_disable);
+ break;
+ }
+
+ return 0;
+}
+
+static int atmel_ssc_suspend(struct snd_soc_component *component)
+{
+ struct atmel_ssc_info *ssc_p;
+ struct platform_device *pdev = to_platform_device(component->dev);
+
+ if (!snd_soc_component_active(component))
+ return 0;
+
+ ssc_p = &ssc_info[pdev->id];
+
+ /* Save the status register before disabling transmit and receive */
+ ssc_p->ssc_state.ssc_sr = ssc_readl(ssc_p->ssc->regs, SR);
+ ssc_writel(ssc_p->ssc->regs, CR, SSC_BIT(CR_TXDIS) | SSC_BIT(CR_RXDIS));
+
+ /* Save the current interrupt mask, then disable unmasked interrupts */
+ ssc_p->ssc_state.ssc_imr = ssc_readl(ssc_p->ssc->regs, IMR);
+ ssc_writel(ssc_p->ssc->regs, IDR, ssc_p->ssc_state.ssc_imr);
+
+ ssc_p->ssc_state.ssc_cmr = ssc_readl(ssc_p->ssc->regs, CMR);
+ ssc_p->ssc_state.ssc_rcmr = ssc_readl(ssc_p->ssc->regs, RCMR);
+ ssc_p->ssc_state.ssc_rfmr = ssc_readl(ssc_p->ssc->regs, RFMR);
+ ssc_p->ssc_state.ssc_tcmr = ssc_readl(ssc_p->ssc->regs, TCMR);
+ ssc_p->ssc_state.ssc_tfmr = ssc_readl(ssc_p->ssc->regs, TFMR);
+
+ return 0;
+}
+
+static int atmel_ssc_resume(struct snd_soc_component *component)
+{
+ struct atmel_ssc_info *ssc_p;
+ struct platform_device *pdev = to_platform_device(component->dev);
+ u32 cr;
+
+ if (!snd_soc_component_active(component))
+ return 0;
+
+ ssc_p = &ssc_info[pdev->id];
+
+ /* restore SSC register settings */
+ ssc_writel(ssc_p->ssc->regs, TFMR, ssc_p->ssc_state.ssc_tfmr);
+ ssc_writel(ssc_p->ssc->regs, TCMR, ssc_p->ssc_state.ssc_tcmr);
+ ssc_writel(ssc_p->ssc->regs, RFMR, ssc_p->ssc_state.ssc_rfmr);
+ ssc_writel(ssc_p->ssc->regs, RCMR, ssc_p->ssc_state.ssc_rcmr);
+ ssc_writel(ssc_p->ssc->regs, CMR, ssc_p->ssc_state.ssc_cmr);
+
+ /* re-enable interrupts */
+ ssc_writel(ssc_p->ssc->regs, IER, ssc_p->ssc_state.ssc_imr);
+
+ /* Re-enable receive and transmit as appropriate */
+ cr = 0;
+ cr |=
+ (ssc_p->ssc_state.ssc_sr & SSC_BIT(SR_RXEN)) ? SSC_BIT(CR_RXEN) : 0;
+ cr |=
+ (ssc_p->ssc_state.ssc_sr & SSC_BIT(SR_TXEN)) ? SSC_BIT(CR_TXEN) : 0;
+ ssc_writel(ssc_p->ssc->regs, CR, cr);
+
+ return 0;
+}
+
+#define ATMEL_SSC_FORMATS (SNDRV_PCM_FMTBIT_S8 | SNDRV_PCM_FMTBIT_S16_LE |\
+ SNDRV_PCM_FMTBIT_S24_LE | SNDRV_PCM_FMTBIT_S32_LE)
+
+static const struct snd_soc_dai_ops atmel_ssc_dai_ops = {
+ .startup = atmel_ssc_startup,
+ .shutdown = atmel_ssc_shutdown,
+ .prepare = atmel_ssc_prepare,
+ .trigger = atmel_ssc_trigger,
+ .hw_params = atmel_ssc_hw_params,
+ .set_fmt = atmel_ssc_set_dai_fmt,
+ .set_clkdiv = atmel_ssc_set_dai_clkdiv,
+};
+
+static struct snd_soc_dai_driver atmel_ssc_dai = {
+ .playback = {
+ .channels_min = 1,
+ .channels_max = 2,
+ .rates = SNDRV_PCM_RATE_CONTINUOUS,
+ .rate_min = 8000,
+ .rate_max = 384000,
+ .formats = ATMEL_SSC_FORMATS,},
+ .capture = {
+ .channels_min = 1,
+ .channels_max = 2,
+ .rates = SNDRV_PCM_RATE_CONTINUOUS,
+ .rate_min = 8000,
+ .rate_max = 384000,
+ .formats = ATMEL_SSC_FORMATS,},
+ .ops = &atmel_ssc_dai_ops,
+};
+
+static const struct snd_soc_component_driver atmel_ssc_component = {
+ .name = "atmel-ssc",
+ .suspend = pm_ptr(atmel_ssc_suspend),
+ .resume = pm_ptr(atmel_ssc_resume),
+ .legacy_dai_naming = 1,
+};
+
+static int asoc_ssc_init(struct device *dev)
+{
+ struct ssc_device *ssc = dev_get_drvdata(dev);
+ int ret;
+
+ ret = devm_snd_soc_register_component(dev, &atmel_ssc_component,
+ &atmel_ssc_dai, 1);
+ if (ret) {
+ dev_err(dev, "Could not register DAI: %d\n", ret);
+ return ret;
+ }
+
+ if (ssc->pdata->use_dma)
+ ret = atmel_pcm_dma_platform_register(dev);
+ else
+ ret = atmel_pcm_pdc_platform_register(dev);
+
+ if (ret) {
+ dev_err(dev, "Could not register PCM: %d\n", ret);
+ return ret;
+ }
+
+ return 0;
+}
+
+/**
+ * atmel_ssc_set_audio - Allocate the specified SSC for audio use.
+ * @ssc_id: SSD ID in [0, NUM_SSC_DEVICES[
+ */
+int atmel_ssc_set_audio(int ssc_id)
+{
+ struct ssc_device *ssc;
+
+ /* If we can grab the SSC briefly to parent the DAI device off it */
+ ssc = ssc_request(ssc_id);
+ if (IS_ERR(ssc)) {
+ pr_err("Unable to parent ASoC SSC DAI on SSC: %ld\n",
+ PTR_ERR(ssc));
+ return PTR_ERR(ssc);
+ } else {
+ ssc_info[ssc_id].ssc = ssc;
+ }
+
+ return asoc_ssc_init(&ssc->pdev->dev);
+}
+EXPORT_SYMBOL_GPL(atmel_ssc_set_audio);
+
+void atmel_ssc_put_audio(int ssc_id)
+{
+ struct ssc_device *ssc = ssc_info[ssc_id].ssc;
+
+ ssc_free(ssc);
+}
+EXPORT_SYMBOL_GPL(atmel_ssc_put_audio);
+
+/* Module information */
+MODULE_AUTHOR("Sedji Gaouaou, sedji.gaouaou@atmel.com, www.atmel.com");
+MODULE_DESCRIPTION("ATMEL SSC ASoC Interface");
+MODULE_LICENSE("GPL");
diff --git a/sound/soc/atmel/atmel_ssc_dai.h b/sound/soc/atmel/atmel_ssc_dai.h
new file mode 100644
index 000000000..3470b966e
--- /dev/null
+++ b/sound/soc/atmel/atmel_ssc_dai.h
@@ -0,0 +1,111 @@
+/* SPDX-License-Identifier: GPL-2.0-or-later */
+/*
+ * atmel_ssc_dai.h - ALSA SSC interface for the Atmel SoC
+ *
+ * Copyright (C) 2005 SAN People
+ * Copyright (C) 2008 Atmel
+ *
+ * Author: Sedji Gaouaou <sedji.gaouaou@atmel.com>
+ * ATMEL CORP.
+ *
+ * Based on at91-ssc.c by
+ * Frank Mandarino <fmandarino@endrelia.com>
+ * Based on pxa2xx Platform drivers by
+ * Liam Girdwood <lrg@slimlogic.co.uk>
+ */
+
+#ifndef _ATMEL_SSC_DAI_H
+#define _ATMEL_SSC_DAI_H
+
+#include <linux/types.h>
+#include <linux/atmel-ssc.h>
+
+#include "atmel-pcm.h"
+
+/* SSC system clock ids */
+#define ATMEL_SYSCLK_MCK 0 /* SSC uses AT91 MCK as system clock */
+
+/* SSC divider ids */
+#define ATMEL_SSC_CMR_DIV 0 /* MCK divider for BCLK */
+#define ATMEL_SSC_TCMR_PERIOD 1 /* BCLK divider for transmit FS */
+#define ATMEL_SSC_RCMR_PERIOD 2 /* BCLK divider for receive FS */
+/*
+ * SSC direction masks
+ */
+#define SSC_DIR_MASK_UNUSED 0
+#define SSC_DIR_MASK_PLAYBACK 1
+#define SSC_DIR_MASK_CAPTURE 2
+
+/*
+ * SSC register values that Atmel left out of <linux/atmel-ssc.h>. These
+ * are expected to be used with SSC_BF
+ */
+/* START bit field values */
+#define SSC_START_CONTINUOUS 0
+#define SSC_START_TX_RX 1
+#define SSC_START_LOW_RF 2
+#define SSC_START_HIGH_RF 3
+#define SSC_START_FALLING_RF 4
+#define SSC_START_RISING_RF 5
+#define SSC_START_LEVEL_RF 6
+#define SSC_START_EDGE_RF 7
+#define SSS_START_COMPARE_0 8
+
+/* CKI bit field values */
+#define SSC_CKI_FALLING 0
+#define SSC_CKI_RISING 1
+
+/* CKO bit field values */
+#define SSC_CKO_NONE 0
+#define SSC_CKO_CONTINUOUS 1
+#define SSC_CKO_TRANSFER 2
+
+/* CKS bit field values */
+#define SSC_CKS_DIV 0
+#define SSC_CKS_CLOCK 1
+#define SSC_CKS_PIN 2
+
+/* FSEDGE bit field values */
+#define SSC_FSEDGE_POSITIVE 0
+#define SSC_FSEDGE_NEGATIVE 1
+
+/* FSOS bit field values */
+#define SSC_FSOS_NONE 0
+#define SSC_FSOS_NEGATIVE 1
+#define SSC_FSOS_POSITIVE 2
+#define SSC_FSOS_LOW 3
+#define SSC_FSOS_HIGH 4
+#define SSC_FSOS_TOGGLE 5
+
+#define START_DELAY 1
+
+struct atmel_ssc_state {
+ u32 ssc_cmr;
+ u32 ssc_rcmr;
+ u32 ssc_rfmr;
+ u32 ssc_tcmr;
+ u32 ssc_tfmr;
+ u32 ssc_sr;
+ u32 ssc_imr;
+};
+
+
+struct atmel_ssc_info {
+ char *name;
+ struct ssc_device *ssc;
+ unsigned short dir_mask; /* 0=unused, 1=playback, 2=capture */
+ unsigned short initialized; /* true if SSC has been initialized */
+ unsigned short daifmt;
+ unsigned short cmr_div;
+ unsigned short tcmr_period;
+ unsigned short rcmr_period;
+ unsigned int forced_divider;
+ struct atmel_pcm_dma_params *dma_params[2];
+ struct atmel_ssc_state ssc_state;
+ unsigned long mck_rate;
+};
+
+int atmel_ssc_set_audio(int ssc_id);
+void atmel_ssc_put_audio(int ssc_id);
+
+#endif /* _AT91_SSC_DAI_H */
diff --git a/sound/soc/atmel/atmel_wm8904.c b/sound/soc/atmel/atmel_wm8904.c
new file mode 100644
index 000000000..9c974c4e1
--- /dev/null
+++ b/sound/soc/atmel/atmel_wm8904.c
@@ -0,0 +1,201 @@
+// SPDX-License-Identifier: GPL-2.0-or-later
+/*
+ * atmel_wm8904 - Atmel ASoC driver for boards with WM8904 codec.
+ *
+ * Copyright (C) 2012 Atmel
+ *
+ * Author: Bo Shen <voice.shen@atmel.com>
+ */
+
+#include <linux/clk.h>
+#include <linux/module.h>
+#include <linux/of.h>
+#include <linux/of_device.h>
+
+#include <sound/soc.h>
+
+#include "../codecs/wm8904.h"
+#include "atmel_ssc_dai.h"
+
+static const struct snd_soc_dapm_widget atmel_asoc_wm8904_dapm_widgets[] = {
+ SND_SOC_DAPM_HP("Headphone Jack", NULL),
+ SND_SOC_DAPM_MIC("Mic", NULL),
+ SND_SOC_DAPM_LINE("Line In Jack", NULL),
+};
+
+static int atmel_asoc_wm8904_hw_params(struct snd_pcm_substream *substream,
+ struct snd_pcm_hw_params *params)
+{
+ struct snd_soc_pcm_runtime *rtd = asoc_substream_to_rtd(substream);
+ struct snd_soc_dai *codec_dai = asoc_rtd_to_codec(rtd, 0);
+ int ret;
+
+ ret = snd_soc_dai_set_pll(codec_dai, WM8904_FLL_MCLK, WM8904_FLL_MCLK,
+ 32768, params_rate(params) * 256);
+ if (ret < 0) {
+ pr_err("%s - failed to set wm8904 codec PLL.", __func__);
+ return ret;
+ }
+
+ /*
+ * As here wm8904 use FLL output as its system clock
+ * so calling set_sysclk won't care freq parameter
+ * then we pass 0
+ */
+ ret = snd_soc_dai_set_sysclk(codec_dai, WM8904_CLK_FLL,
+ 0, SND_SOC_CLOCK_IN);
+ if (ret < 0) {
+ pr_err("%s -failed to set wm8904 SYSCLK\n", __func__);
+ return ret;
+ }
+
+ return 0;
+}
+
+static const struct snd_soc_ops atmel_asoc_wm8904_ops = {
+ .hw_params = atmel_asoc_wm8904_hw_params,
+};
+
+SND_SOC_DAILINK_DEFS(pcm,
+ DAILINK_COMP_ARRAY(COMP_EMPTY()),
+ DAILINK_COMP_ARRAY(COMP_CODEC(NULL, "wm8904-hifi")),
+ DAILINK_COMP_ARRAY(COMP_EMPTY()));
+
+static struct snd_soc_dai_link atmel_asoc_wm8904_dailink = {
+ .name = "WM8904",
+ .stream_name = "WM8904 PCM",
+ .dai_fmt = SND_SOC_DAIFMT_I2S
+ | SND_SOC_DAIFMT_NB_NF
+ | SND_SOC_DAIFMT_CBP_CFP,
+ .ops = &atmel_asoc_wm8904_ops,
+ SND_SOC_DAILINK_REG(pcm),
+};
+
+static struct snd_soc_card atmel_asoc_wm8904_card = {
+ .name = "atmel_asoc_wm8904",
+ .owner = THIS_MODULE,
+ .dai_link = &atmel_asoc_wm8904_dailink,
+ .num_links = 1,
+ .dapm_widgets = atmel_asoc_wm8904_dapm_widgets,
+ .num_dapm_widgets = ARRAY_SIZE(atmel_asoc_wm8904_dapm_widgets),
+ .fully_routed = true,
+};
+
+static int atmel_asoc_wm8904_dt_init(struct platform_device *pdev)
+{
+ struct device_node *np = pdev->dev.of_node;
+ struct device_node *codec_np, *cpu_np;
+ struct snd_soc_card *card = &atmel_asoc_wm8904_card;
+ struct snd_soc_dai_link *dailink = &atmel_asoc_wm8904_dailink;
+ 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;
+ }
+
+ ret = snd_soc_of_parse_audio_routing(card, "atmel,audio-routing");
+ if (ret) {
+ dev_err(&pdev->dev, "failed to parse audio routing\n");
+ return ret;
+ }
+
+ cpu_np = of_parse_phandle(np, "atmel,ssc-controller", 0);
+ if (!cpu_np) {
+ dev_err(&pdev->dev, "failed to get dai and pcm info\n");
+ ret = -EINVAL;
+ return ret;
+ }
+ dailink->cpus->of_node = cpu_np;
+ dailink->platforms->of_node = cpu_np;
+ of_node_put(cpu_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->codecs->of_node = codec_np;
+ of_node_put(codec_np);
+
+ return 0;
+}
+
+static int atmel_asoc_wm8904_probe(struct platform_device *pdev)
+{
+ struct snd_soc_card *card = &atmel_asoc_wm8904_card;
+ struct snd_soc_dai_link *dailink = &atmel_asoc_wm8904_dailink;
+ int id, ret;
+
+ card->dev = &pdev->dev;
+ ret = atmel_asoc_wm8904_dt_init(pdev);
+ if (ret) {
+ dev_err(&pdev->dev, "failed to init dt info\n");
+ return ret;
+ }
+
+ id = of_alias_get_id((struct device_node *)dailink->cpus->of_node, "ssc");
+ ret = atmel_ssc_set_audio(id);
+ if (ret != 0) {
+ dev_err(&pdev->dev, "failed to set SSC %d for audio\n", id);
+ return ret;
+ }
+
+ ret = snd_soc_register_card(card);
+ if (ret) {
+ dev_err(&pdev->dev, "snd_soc_register_card failed\n");
+ goto err_set_audio;
+ }
+
+ return 0;
+
+err_set_audio:
+ atmel_ssc_put_audio(id);
+ return ret;
+}
+
+static int atmel_asoc_wm8904_remove(struct platform_device *pdev)
+{
+ struct snd_soc_card *card = platform_get_drvdata(pdev);
+ struct snd_soc_dai_link *dailink = &atmel_asoc_wm8904_dailink;
+ int id;
+
+ id = of_alias_get_id((struct device_node *)dailink->cpus->of_node, "ssc");
+
+ snd_soc_unregister_card(card);
+ atmel_ssc_put_audio(id);
+
+ return 0;
+}
+
+#ifdef CONFIG_OF
+static const struct of_device_id atmel_asoc_wm8904_dt_ids[] = {
+ { .compatible = "atmel,asoc-wm8904", },
+ { }
+};
+MODULE_DEVICE_TABLE(of, atmel_asoc_wm8904_dt_ids);
+#endif
+
+static struct platform_driver atmel_asoc_wm8904_driver = {
+ .driver = {
+ .name = "atmel-wm8904-audio",
+ .of_match_table = of_match_ptr(atmel_asoc_wm8904_dt_ids),
+ .pm = &snd_soc_pm_ops,
+ },
+ .probe = atmel_asoc_wm8904_probe,
+ .remove = atmel_asoc_wm8904_remove,
+};
+
+module_platform_driver(atmel_asoc_wm8904_driver);
+
+/* Module information */
+MODULE_AUTHOR("Bo Shen <voice.shen@atmel.com>");
+MODULE_DESCRIPTION("ALSA SoC machine driver for Atmel EK with WM8904 codec");
+MODULE_LICENSE("GPL");
diff --git a/sound/soc/atmel/mchp-i2s-mcc.c b/sound/soc/atmel/mchp-i2s-mcc.c
new file mode 100644
index 000000000..6dfb96c57
--- /dev/null
+++ b/sound/soc/atmel/mchp-i2s-mcc.c
@@ -0,0 +1,1112 @@
+// SPDX-License-Identifier: GPL-2.0
+//
+// Driver for Microchip I2S Multi-channel controller
+//
+// Copyright (C) 2018 Microchip Technology Inc. and its subsidiaries
+//
+// Author: Codrin Ciubotariu <codrin.ciubotariu@microchip.com>
+
+#include <linux/init.h>
+#include <linux/module.h>
+#include <linux/device.h>
+#include <linux/slab.h>
+
+#include <linux/delay.h>
+#include <linux/io.h>
+#include <linux/clk.h>
+#include <linux/mfd/syscon.h>
+#include <linux/lcm.h>
+#include <linux/of_device.h>
+
+#include <sound/core.h>
+#include <sound/pcm.h>
+#include <sound/pcm_params.h>
+#include <sound/initval.h>
+#include <sound/soc.h>
+#include <sound/dmaengine_pcm.h>
+
+/*
+ * ---- I2S Controller Register map ----
+ */
+#define MCHP_I2SMCC_CR 0x0000 /* Control Register */
+#define MCHP_I2SMCC_MRA 0x0004 /* Mode Register A */
+#define MCHP_I2SMCC_MRB 0x0008 /* Mode Register B */
+#define MCHP_I2SMCC_SR 0x000C /* Status Register */
+#define MCHP_I2SMCC_IERA 0x0010 /* Interrupt Enable Register A */
+#define MCHP_I2SMCC_IDRA 0x0014 /* Interrupt Disable Register A */
+#define MCHP_I2SMCC_IMRA 0x0018 /* Interrupt Mask Register A */
+#define MCHP_I2SMCC_ISRA 0X001C /* Interrupt Status Register A */
+
+#define MCHP_I2SMCC_IERB 0x0020 /* Interrupt Enable Register B */
+#define MCHP_I2SMCC_IDRB 0x0024 /* Interrupt Disable Register B */
+#define MCHP_I2SMCC_IMRB 0x0028 /* Interrupt Mask Register B */
+#define MCHP_I2SMCC_ISRB 0X002C /* Interrupt Status Register B */
+
+#define MCHP_I2SMCC_RHR 0x0030 /* Receiver Holding Register */
+#define MCHP_I2SMCC_THR 0x0034 /* Transmitter Holding Register */
+
+#define MCHP_I2SMCC_RHL0R 0x0040 /* Receiver Holding Left 0 Register */
+#define MCHP_I2SMCC_RHR0R 0x0044 /* Receiver Holding Right 0 Register */
+
+#define MCHP_I2SMCC_RHL1R 0x0048 /* Receiver Holding Left 1 Register */
+#define MCHP_I2SMCC_RHR1R 0x004C /* Receiver Holding Right 1 Register */
+
+#define MCHP_I2SMCC_RHL2R 0x0050 /* Receiver Holding Left 2 Register */
+#define MCHP_I2SMCC_RHR2R 0x0054 /* Receiver Holding Right 2 Register */
+
+#define MCHP_I2SMCC_RHL3R 0x0058 /* Receiver Holding Left 3 Register */
+#define MCHP_I2SMCC_RHR3R 0x005C /* Receiver Holding Right 3 Register */
+
+#define MCHP_I2SMCC_THL0R 0x0060 /* Transmitter Holding Left 0 Register */
+#define MCHP_I2SMCC_THR0R 0x0064 /* Transmitter Holding Right 0 Register */
+
+#define MCHP_I2SMCC_THL1R 0x0068 /* Transmitter Holding Left 1 Register */
+#define MCHP_I2SMCC_THR1R 0x006C /* Transmitter Holding Right 1 Register */
+
+#define MCHP_I2SMCC_THL2R 0x0070 /* Transmitter Holding Left 2 Register */
+#define MCHP_I2SMCC_THR2R 0x0074 /* Transmitter Holding Right 2 Register */
+
+#define MCHP_I2SMCC_THL3R 0x0078 /* Transmitter Holding Left 3 Register */
+#define MCHP_I2SMCC_THR3R 0x007C /* Transmitter Holding Right 3 Register */
+
+#define MCHP_I2SMCC_VERSION 0x00FC /* Version Register */
+
+/*
+ * ---- Control Register (Write-only) ----
+ */
+#define MCHP_I2SMCC_CR_RXEN BIT(0) /* Receiver Enable */
+#define MCHP_I2SMCC_CR_RXDIS BIT(1) /* Receiver Disable */
+#define MCHP_I2SMCC_CR_CKEN BIT(2) /* Clock Enable */
+#define MCHP_I2SMCC_CR_CKDIS BIT(3) /* Clock Disable */
+#define MCHP_I2SMCC_CR_TXEN BIT(4) /* Transmitter Enable */
+#define MCHP_I2SMCC_CR_TXDIS BIT(5) /* Transmitter Disable */
+#define MCHP_I2SMCC_CR_SWRST BIT(7) /* Software Reset */
+
+/*
+ * ---- Mode Register A (Read/Write) ----
+ */
+#define MCHP_I2SMCC_MRA_MODE_MASK GENMASK(0, 0)
+#define MCHP_I2SMCC_MRA_MODE_SLAVE (0 << 0)
+#define MCHP_I2SMCC_MRA_MODE_MASTER (1 << 0)
+
+#define MCHP_I2SMCC_MRA_DATALENGTH_MASK GENMASK(3, 1)
+#define MCHP_I2SMCC_MRA_DATALENGTH_32_BITS (0 << 1)
+#define MCHP_I2SMCC_MRA_DATALENGTH_24_BITS (1 << 1)
+#define MCHP_I2SMCC_MRA_DATALENGTH_20_BITS (2 << 1)
+#define MCHP_I2SMCC_MRA_DATALENGTH_18_BITS (3 << 1)
+#define MCHP_I2SMCC_MRA_DATALENGTH_16_BITS (4 << 1)
+#define MCHP_I2SMCC_MRA_DATALENGTH_16_BITS_COMPACT (5 << 1)
+#define MCHP_I2SMCC_MRA_DATALENGTH_8_BITS (6 << 1)
+#define MCHP_I2SMCC_MRA_DATALENGTH_8_BITS_COMPACT (7 << 1)
+
+#define MCHP_I2SMCC_MRA_WIRECFG_MASK GENMASK(5, 4)
+#define MCHP_I2SMCC_MRA_WIRECFG_TDM(pin) (((pin) << 4) & \
+ MCHP_I2SMCC_MRA_WIRECFG_MASK)
+#define MCHP_I2SMCC_MRA_WIRECFG_I2S_1_TDM_0 (0 << 4)
+#define MCHP_I2SMCC_MRA_WIRECFG_I2S_2_TDM_1 (1 << 4)
+#define MCHP_I2SMCC_MRA_WIRECFG_I2S_4_TDM_2 (2 << 4)
+#define MCHP_I2SMCC_MRA_WIRECFG_TDM_3 (3 << 4)
+
+#define MCHP_I2SMCC_MRA_FORMAT_MASK GENMASK(7, 6)
+#define MCHP_I2SMCC_MRA_FORMAT_I2S (0 << 6)
+#define MCHP_I2SMCC_MRA_FORMAT_LJ (1 << 6) /* Left Justified */
+#define MCHP_I2SMCC_MRA_FORMAT_TDM (2 << 6)
+#define MCHP_I2SMCC_MRA_FORMAT_TDMLJ (3 << 6)
+
+/* Transmitter uses one DMA channel ... */
+/* Left audio samples duplicated to right audio channel */
+#define MCHP_I2SMCC_MRA_RXMONO BIT(8)
+
+/* I2SDO output of I2SC is internally connected to I2SDI input */
+#define MCHP_I2SMCC_MRA_RXLOOP BIT(9)
+
+/* Receiver uses one DMA channel ... */
+/* Left audio samples duplicated to right audio channel */
+#define MCHP_I2SMCC_MRA_TXMONO BIT(10)
+
+/* x sample transmitted when underrun */
+#define MCHP_I2SMCC_MRA_TXSAME_ZERO (0 << 11) /* Zero sample */
+#define MCHP_I2SMCC_MRA_TXSAME_PREVIOUS (1 << 11) /* Previous sample */
+
+/* select between peripheral clock and generated clock */
+#define MCHP_I2SMCC_MRA_SRCCLK_PCLK (0 << 12)
+#define MCHP_I2SMCC_MRA_SRCCLK_GCLK (1 << 12)
+
+/* Number of TDM Channels - 1 */
+#define MCHP_I2SMCC_MRA_NBCHAN_MASK GENMASK(15, 13)
+#define MCHP_I2SMCC_MRA_NBCHAN(ch) \
+ ((((ch) - 1) << 13) & MCHP_I2SMCC_MRA_NBCHAN_MASK)
+
+/* Selected Clock to I2SMCC Master Clock ratio */
+#define MCHP_I2SMCC_MRA_IMCKDIV_MASK GENMASK(21, 16)
+#define MCHP_I2SMCC_MRA_IMCKDIV(div) \
+ (((div) << 16) & MCHP_I2SMCC_MRA_IMCKDIV_MASK)
+
+/* TDM Frame Synchronization */
+#define MCHP_I2SMCC_MRA_TDMFS_MASK GENMASK(23, 22)
+#define MCHP_I2SMCC_MRA_TDMFS_SLOT (0 << 22)
+#define MCHP_I2SMCC_MRA_TDMFS_HALF (1 << 22)
+#define MCHP_I2SMCC_MRA_TDMFS_BIT (2 << 22)
+
+/* Selected Clock to I2SMC Serial Clock ratio */
+#define MCHP_I2SMCC_MRA_ISCKDIV_MASK GENMASK(29, 24)
+#define MCHP_I2SMCC_MRA_ISCKDIV(div) \
+ (((div) << 24) & MCHP_I2SMCC_MRA_ISCKDIV_MASK)
+
+/* Master Clock mode */
+#define MCHP_I2SMCC_MRA_IMCKMODE_MASK GENMASK(30, 30)
+/* 0: No master clock generated*/
+#define MCHP_I2SMCC_MRA_IMCKMODE_NONE (0 << 30)
+/* 1: master clock generated (internally generated clock drives I2SMCK pin) */
+#define MCHP_I2SMCC_MRA_IMCKMODE_GEN (1 << 30)
+
+/* Slot Width */
+/* 0: slot is 32 bits wide for DATALENGTH = 18/20/24 bits. */
+/* 1: slot is 24 bits wide for DATALENGTH = 18/20/24 bits. */
+#define MCHP_I2SMCC_MRA_IWS BIT(31)
+
+/*
+ * ---- Mode Register B (Read/Write) ----
+ */
+/* all enabled I2S left channels are filled first, then I2S right channels */
+#define MCHP_I2SMCC_MRB_CRAMODE_LEFT_FIRST (0 << 0)
+/*
+ * an enabled I2S left channel is filled, then the corresponding right
+ * channel, until all channels are filled
+ */
+#define MCHP_I2SMCC_MRB_CRAMODE_REGULAR (1 << 0)
+
+#define MCHP_I2SMCC_MRB_FIFOEN BIT(4)
+
+#define MCHP_I2SMCC_MRB_DMACHUNK_MASK GENMASK(9, 8)
+#define MCHP_I2SMCC_MRB_DMACHUNK(no_words) \
+ (((fls(no_words) - 1) << 8) & MCHP_I2SMCC_MRB_DMACHUNK_MASK)
+
+#define MCHP_I2SMCC_MRB_CLKSEL_MASK GENMASK(16, 16)
+#define MCHP_I2SMCC_MRB_CLKSEL_EXT (0 << 16)
+#define MCHP_I2SMCC_MRB_CLKSEL_INT (1 << 16)
+
+/*
+ * ---- Status Registers (Read-only) ----
+ */
+#define MCHP_I2SMCC_SR_RXEN BIT(0) /* Receiver Enabled */
+#define MCHP_I2SMCC_SR_TXEN BIT(4) /* Transmitter Enabled */
+
+/*
+ * ---- Interrupt Enable/Disable/Mask/Status Registers A ----
+ */
+#define MCHP_I2SMCC_INT_TXRDY_MASK(ch) GENMASK((ch) - 1, 0)
+#define MCHP_I2SMCC_INT_TXRDYCH(ch) BIT(ch)
+#define MCHP_I2SMCC_INT_TXUNF_MASK(ch) GENMASK((ch) + 7, 8)
+#define MCHP_I2SMCC_INT_TXUNFCH(ch) BIT((ch) + 8)
+#define MCHP_I2SMCC_INT_RXRDY_MASK(ch) GENMASK((ch) + 15, 16)
+#define MCHP_I2SMCC_INT_RXRDYCH(ch) BIT((ch) + 16)
+#define MCHP_I2SMCC_INT_RXOVF_MASK(ch) GENMASK((ch) + 23, 24)
+#define MCHP_I2SMCC_INT_RXOVFCH(ch) BIT((ch) + 24)
+
+/*
+ * ---- Interrupt Enable/Disable/Mask/Status Registers B ----
+ */
+#define MCHP_I2SMCC_INT_WERR BIT(0)
+#define MCHP_I2SMCC_INT_TXFFRDY BIT(8)
+#define MCHP_I2SMCC_INT_TXFFEMP BIT(9)
+#define MCHP_I2SMCC_INT_RXFFRDY BIT(12)
+#define MCHP_I2SMCC_INT_RXFFFUL BIT(13)
+
+/*
+ * ---- Version Register (Read-only) ----
+ */
+#define MCHP_I2SMCC_VERSION_MASK GENMASK(11, 0)
+
+#define MCHP_I2SMCC_MAX_CHANNELS 8
+#define MCHP_I2MCC_TDM_SLOT_WIDTH 32
+
+static const struct regmap_config mchp_i2s_mcc_regmap_config = {
+ .reg_bits = 32,
+ .reg_stride = 4,
+ .val_bits = 32,
+ .max_register = MCHP_I2SMCC_VERSION,
+};
+
+struct mchp_i2s_mcc_soc_data {
+ unsigned int data_pin_pair_num;
+ bool has_fifo;
+};
+
+struct mchp_i2s_mcc_dev {
+ struct wait_queue_head wq_txrdy;
+ struct wait_queue_head wq_rxrdy;
+ struct device *dev;
+ struct regmap *regmap;
+ struct clk *pclk;
+ struct clk *gclk;
+ const struct mchp_i2s_mcc_soc_data *soc;
+ struct snd_dmaengine_dai_dma_data playback;
+ struct snd_dmaengine_dai_dma_data capture;
+ unsigned int fmt;
+ unsigned int sysclk;
+ unsigned int frame_length;
+ int tdm_slots;
+ int channels;
+ u8 tdm_data_pair;
+ unsigned int gclk_use:1;
+ unsigned int gclk_running:1;
+ unsigned int tx_rdy:1;
+ unsigned int rx_rdy:1;
+};
+
+static irqreturn_t mchp_i2s_mcc_interrupt(int irq, void *dev_id)
+{
+ struct mchp_i2s_mcc_dev *dev = dev_id;
+ u32 sra, imra, srb, imrb, pendinga, pendingb, idra = 0, idrb = 0;
+ irqreturn_t ret = IRQ_NONE;
+
+ regmap_read(dev->regmap, MCHP_I2SMCC_IMRA, &imra);
+ regmap_read(dev->regmap, MCHP_I2SMCC_ISRA, &sra);
+ pendinga = imra & sra;
+
+ regmap_read(dev->regmap, MCHP_I2SMCC_IMRB, &imrb);
+ regmap_read(dev->regmap, MCHP_I2SMCC_ISRB, &srb);
+ pendingb = imrb & srb;
+
+ if (!pendinga && !pendingb)
+ return IRQ_NONE;
+
+ /*
+ * Tx/Rx ready interrupts are enabled when stopping only, to assure
+ * availability and to disable clocks if necessary
+ */
+ if (dev->soc->has_fifo) {
+ idrb |= pendingb & (MCHP_I2SMCC_INT_TXFFRDY |
+ MCHP_I2SMCC_INT_RXFFRDY);
+ } else {
+ idra |= pendinga & (MCHP_I2SMCC_INT_TXRDY_MASK(dev->channels) |
+ MCHP_I2SMCC_INT_RXRDY_MASK(dev->channels));
+ }
+ if (idra || idrb)
+ ret = IRQ_HANDLED;
+
+ if ((!dev->soc->has_fifo &&
+ (imra & MCHP_I2SMCC_INT_TXRDY_MASK(dev->channels)) &&
+ (imra & MCHP_I2SMCC_INT_TXRDY_MASK(dev->channels)) ==
+ (idra & MCHP_I2SMCC_INT_TXRDY_MASK(dev->channels))) ||
+ (dev->soc->has_fifo && imrb & MCHP_I2SMCC_INT_TXFFRDY)) {
+ dev->tx_rdy = 1;
+ wake_up_interruptible(&dev->wq_txrdy);
+ }
+ if ((!dev->soc->has_fifo &&
+ (imra & MCHP_I2SMCC_INT_RXRDY_MASK(dev->channels)) &&
+ (imra & MCHP_I2SMCC_INT_RXRDY_MASK(dev->channels)) ==
+ (idra & MCHP_I2SMCC_INT_RXRDY_MASK(dev->channels))) ||
+ (dev->soc->has_fifo && imrb & MCHP_I2SMCC_INT_RXFFRDY)) {
+ dev->rx_rdy = 1;
+ wake_up_interruptible(&dev->wq_rxrdy);
+ }
+ if (dev->soc->has_fifo)
+ regmap_write(dev->regmap, MCHP_I2SMCC_IDRB, idrb);
+ else
+ regmap_write(dev->regmap, MCHP_I2SMCC_IDRA, idra);
+
+ return ret;
+}
+
+static int mchp_i2s_mcc_set_sysclk(struct snd_soc_dai *dai,
+ int clk_id, unsigned int freq, int dir)
+{
+ struct mchp_i2s_mcc_dev *dev = snd_soc_dai_get_drvdata(dai);
+
+ dev_dbg(dev->dev, "%s() clk_id=%d freq=%u dir=%d\n",
+ __func__, clk_id, freq, dir);
+
+ /* We do not need SYSCLK */
+ if (dir == SND_SOC_CLOCK_IN)
+ return 0;
+
+ dev->sysclk = freq;
+
+ return 0;
+}
+
+static int mchp_i2s_mcc_set_bclk_ratio(struct snd_soc_dai *dai,
+ unsigned int ratio)
+{
+ struct mchp_i2s_mcc_dev *dev = snd_soc_dai_get_drvdata(dai);
+
+ dev_dbg(dev->dev, "%s() ratio=%u\n", __func__, ratio);
+
+ dev->frame_length = ratio;
+
+ return 0;
+}
+
+static int mchp_i2s_mcc_set_dai_fmt(struct snd_soc_dai *dai, unsigned int fmt)
+{
+ struct mchp_i2s_mcc_dev *dev = snd_soc_dai_get_drvdata(dai);
+
+ dev_dbg(dev->dev, "%s() fmt=%#x\n", __func__, fmt);
+
+ /* We don't support any kind of clock inversion */
+ if ((fmt & SND_SOC_DAIFMT_INV_MASK) != SND_SOC_DAIFMT_NB_NF)
+ return -EINVAL;
+
+ /* We can't generate only FSYNC */
+ if ((fmt & SND_SOC_DAIFMT_CLOCK_PROVIDER_MASK) == SND_SOC_DAIFMT_BC_FP)
+ return -EINVAL;
+
+ /* We can only reconfigure the IP when it's stopped */
+ if (fmt & SND_SOC_DAIFMT_CONT)
+ return -EINVAL;
+
+ dev->fmt = fmt;
+
+ return 0;
+}
+
+static int mchp_i2s_mcc_set_dai_tdm_slot(struct snd_soc_dai *dai,
+ unsigned int tx_mask,
+ unsigned int rx_mask,
+ int slots, int slot_width)
+{
+ struct mchp_i2s_mcc_dev *dev = snd_soc_dai_get_drvdata(dai);
+
+ dev_dbg(dev->dev,
+ "%s() tx_mask=0x%08x rx_mask=0x%08x slots=%d width=%d\n",
+ __func__, tx_mask, rx_mask, slots, slot_width);
+
+ if (slots < 0 || slots > MCHP_I2SMCC_MAX_CHANNELS ||
+ slot_width != MCHP_I2MCC_TDM_SLOT_WIDTH)
+ return -EINVAL;
+
+ if (slots) {
+ /* We do not support daisy chain */
+ if (rx_mask != GENMASK(slots - 1, 0) ||
+ rx_mask != tx_mask)
+ return -EINVAL;
+ }
+
+ dev->tdm_slots = slots;
+ dev->frame_length = slots * MCHP_I2MCC_TDM_SLOT_WIDTH;
+
+ return 0;
+}
+
+static int mchp_i2s_mcc_clk_get_rate_diff(struct clk *clk,
+ unsigned long rate,
+ struct clk **best_clk,
+ unsigned long *best_rate,
+ unsigned long *best_diff_rate)
+{
+ long round_rate;
+ unsigned int diff_rate;
+
+ round_rate = clk_round_rate(clk, rate);
+ if (round_rate < 0)
+ return (int)round_rate;
+
+ diff_rate = abs(rate - round_rate);
+ if (diff_rate < *best_diff_rate) {
+ *best_clk = clk;
+ *best_diff_rate = diff_rate;
+ *best_rate = rate;
+ }
+
+ return 0;
+}
+
+static int mchp_i2s_mcc_config_divs(struct mchp_i2s_mcc_dev *dev,
+ unsigned int bclk, unsigned int *mra,
+ unsigned long *best_rate)
+{
+ unsigned long clk_rate;
+ unsigned long lcm_rate;
+ unsigned long best_diff_rate = ~0;
+ unsigned int sysclk;
+ struct clk *best_clk = NULL;
+ int ret;
+
+ /* For code simplification */
+ if (!dev->sysclk)
+ sysclk = bclk;
+ else
+ sysclk = dev->sysclk;
+
+ /*
+ * MCLK is Selected CLK / (2 * IMCKDIV),
+ * BCLK is Selected CLK / (2 * ISCKDIV);
+ * if IMCKDIV or ISCKDIV are 0, MCLK or BCLK = Selected CLK
+ */
+ lcm_rate = lcm(sysclk, bclk);
+ if ((lcm_rate / sysclk % 2 == 1 && lcm_rate / sysclk > 2) ||
+ (lcm_rate / bclk % 2 == 1 && lcm_rate / bclk > 2))
+ lcm_rate *= 2;
+
+ for (clk_rate = lcm_rate;
+ (clk_rate == sysclk || clk_rate / (sysclk * 2) <= GENMASK(5, 0)) &&
+ (clk_rate == bclk || clk_rate / (bclk * 2) <= GENMASK(5, 0));
+ clk_rate += lcm_rate) {
+ ret = mchp_i2s_mcc_clk_get_rate_diff(dev->gclk, clk_rate,
+ &best_clk, best_rate,
+ &best_diff_rate);
+ if (ret) {
+ dev_err(dev->dev, "gclk error for rate %lu: %d",
+ clk_rate, ret);
+ } else {
+ if (!best_diff_rate) {
+ dev_dbg(dev->dev, "found perfect rate on gclk: %lu\n",
+ clk_rate);
+ break;
+ }
+ }
+
+ ret = mchp_i2s_mcc_clk_get_rate_diff(dev->pclk, clk_rate,
+ &best_clk, best_rate,
+ &best_diff_rate);
+ if (ret) {
+ dev_err(dev->dev, "pclk error for rate %lu: %d",
+ clk_rate, ret);
+ } else {
+ if (!best_diff_rate) {
+ dev_dbg(dev->dev, "found perfect rate on pclk: %lu\n",
+ clk_rate);
+ break;
+ }
+ }
+ }
+
+ /* check if clocks returned only errors */
+ if (!best_clk) {
+ dev_err(dev->dev, "unable to change rate to clocks\n");
+ return -EINVAL;
+ }
+
+ dev_dbg(dev->dev, "source CLK is %s with rate %lu, diff %lu\n",
+ best_clk == dev->pclk ? "pclk" : "gclk",
+ *best_rate, best_diff_rate);
+
+ /* Configure divisors */
+ if (dev->sysclk)
+ *mra |= MCHP_I2SMCC_MRA_IMCKDIV(*best_rate / (2 * sysclk));
+ *mra |= MCHP_I2SMCC_MRA_ISCKDIV(*best_rate / (2 * bclk));
+
+ if (best_clk == dev->gclk)
+ *mra |= MCHP_I2SMCC_MRA_SRCCLK_GCLK;
+ else
+ *mra |= MCHP_I2SMCC_MRA_SRCCLK_PCLK;
+
+ return 0;
+}
+
+static int mchp_i2s_mcc_is_running(struct mchp_i2s_mcc_dev *dev)
+{
+ u32 sr;
+
+ regmap_read(dev->regmap, MCHP_I2SMCC_SR, &sr);
+ return !!(sr & (MCHP_I2SMCC_SR_TXEN | MCHP_I2SMCC_SR_RXEN));
+}
+
+static int mchp_i2s_mcc_hw_params(struct snd_pcm_substream *substream,
+ struct snd_pcm_hw_params *params,
+ struct snd_soc_dai *dai)
+{
+ unsigned long rate = 0;
+ struct mchp_i2s_mcc_dev *dev = snd_soc_dai_get_drvdata(dai);
+ u32 mra = 0;
+ u32 mrb = 0;
+ unsigned int channels = params_channels(params);
+ unsigned int frame_length = dev->frame_length;
+ unsigned int bclk_rate;
+ int set_divs = 0;
+ int ret;
+ bool is_playback = (substream->stream == SNDRV_PCM_STREAM_PLAYBACK);
+
+ dev_dbg(dev->dev, "%s() rate=%u format=%#x width=%u channels=%u\n",
+ __func__, params_rate(params), params_format(params),
+ params_width(params), params_channels(params));
+
+ switch (dev->fmt & SND_SOC_DAIFMT_FORMAT_MASK) {
+ case SND_SOC_DAIFMT_I2S:
+ if (dev->tdm_slots) {
+ dev_err(dev->dev, "I2S with TDM is not supported\n");
+ return -EINVAL;
+ }
+ mra |= MCHP_I2SMCC_MRA_FORMAT_I2S;
+ break;
+ case SND_SOC_DAIFMT_LEFT_J:
+ if (dev->tdm_slots) {
+ dev_err(dev->dev, "Left-Justified with TDM is not supported\n");
+ return -EINVAL;
+ }
+ mra |= MCHP_I2SMCC_MRA_FORMAT_LJ;
+ break;
+ case SND_SOC_DAIFMT_DSP_A:
+ mra |= MCHP_I2SMCC_MRA_FORMAT_TDM;
+ break;
+ default:
+ dev_err(dev->dev, "unsupported bus format\n");
+ return -EINVAL;
+ }
+
+ switch (dev->fmt & SND_SOC_DAIFMT_CLOCK_PROVIDER_MASK) {
+ case SND_SOC_DAIFMT_BP_FP:
+ /* cpu is BCLK and LRC master */
+ mra |= MCHP_I2SMCC_MRA_MODE_MASTER;
+ if (dev->sysclk)
+ mra |= MCHP_I2SMCC_MRA_IMCKMODE_GEN;
+ set_divs = 1;
+ break;
+ case SND_SOC_DAIFMT_BP_FC:
+ /* cpu is BCLK master */
+ mrb |= MCHP_I2SMCC_MRB_CLKSEL_INT;
+ set_divs = 1;
+ fallthrough;
+ case SND_SOC_DAIFMT_BC_FC:
+ /* cpu is slave */
+ mra |= MCHP_I2SMCC_MRA_MODE_SLAVE;
+ if (dev->sysclk)
+ dev_warn(dev->dev, "Unable to generate MCLK in Slave mode\n");
+ break;
+ default:
+ dev_err(dev->dev, "unsupported master/slave mode\n");
+ return -EINVAL;
+ }
+
+ if (dev->fmt & (SND_SOC_DAIFMT_I2S | SND_SOC_DAIFMT_LEFT_J)) {
+ /* for I2S and LEFT_J one pin is needed for every 2 channels */
+ if (channels > dev->soc->data_pin_pair_num * 2) {
+ dev_err(dev->dev,
+ "unsupported number of audio channels: %d\n",
+ channels);
+ return -EINVAL;
+ }
+
+ /* enable for interleaved format */
+ mrb |= MCHP_I2SMCC_MRB_CRAMODE_REGULAR;
+
+ switch (channels) {
+ case 1:
+ if (is_playback)
+ mra |= MCHP_I2SMCC_MRA_TXMONO;
+ else
+ mra |= MCHP_I2SMCC_MRA_RXMONO;
+ break;
+ case 2:
+ break;
+ case 4:
+ mra |= MCHP_I2SMCC_MRA_WIRECFG_I2S_2_TDM_1;
+ break;
+ case 8:
+ mra |= MCHP_I2SMCC_MRA_WIRECFG_I2S_4_TDM_2;
+ break;
+ default:
+ dev_err(dev->dev, "unsupported number of audio channels\n");
+ return -EINVAL;
+ }
+
+ if (!frame_length)
+ frame_length = 2 * params_physical_width(params);
+ } else if (dev->fmt & SND_SOC_DAIFMT_DSP_A) {
+ mra |= MCHP_I2SMCC_MRA_WIRECFG_TDM(dev->tdm_data_pair);
+
+ if (dev->tdm_slots) {
+ if (channels % 2 && channels * 2 <= dev->tdm_slots) {
+ /*
+ * Duplicate data for even-numbered channels
+ * to odd-numbered channels
+ */
+ if (is_playback)
+ mra |= MCHP_I2SMCC_MRA_TXMONO;
+ else
+ mra |= MCHP_I2SMCC_MRA_RXMONO;
+ }
+ channels = dev->tdm_slots;
+ }
+
+ mra |= MCHP_I2SMCC_MRA_NBCHAN(channels);
+ if (!frame_length)
+ frame_length = channels * MCHP_I2MCC_TDM_SLOT_WIDTH;
+ }
+
+ /*
+ * We must have the same burst size configured
+ * in the DMA transfer and in out IP
+ */
+ mrb |= MCHP_I2SMCC_MRB_DMACHUNK(channels);
+ if (is_playback)
+ dev->playback.maxburst = 1 << (fls(channels) - 1);
+ else
+ dev->capture.maxburst = 1 << (fls(channels) - 1);
+
+ switch (params_format(params)) {
+ case SNDRV_PCM_FORMAT_S8:
+ mra |= MCHP_I2SMCC_MRA_DATALENGTH_8_BITS;
+ break;
+ case SNDRV_PCM_FORMAT_S16_LE:
+ mra |= MCHP_I2SMCC_MRA_DATALENGTH_16_BITS;
+ break;
+ case SNDRV_PCM_FORMAT_S18_3LE:
+ mra |= MCHP_I2SMCC_MRA_DATALENGTH_18_BITS |
+ MCHP_I2SMCC_MRA_IWS;
+ break;
+ case SNDRV_PCM_FORMAT_S20_3LE:
+ mra |= MCHP_I2SMCC_MRA_DATALENGTH_20_BITS |
+ MCHP_I2SMCC_MRA_IWS;
+ break;
+ case SNDRV_PCM_FORMAT_S24_3LE:
+ mra |= MCHP_I2SMCC_MRA_DATALENGTH_24_BITS |
+ MCHP_I2SMCC_MRA_IWS;
+ break;
+ case SNDRV_PCM_FORMAT_S24_LE:
+ mra |= MCHP_I2SMCC_MRA_DATALENGTH_24_BITS;
+ break;
+ case SNDRV_PCM_FORMAT_S32_LE:
+ mra |= MCHP_I2SMCC_MRA_DATALENGTH_32_BITS;
+ break;
+ default:
+ dev_err(dev->dev, "unsupported size/endianness for audio samples\n");
+ return -EINVAL;
+ }
+
+ if (set_divs) {
+ bclk_rate = frame_length * params_rate(params);
+ ret = mchp_i2s_mcc_config_divs(dev, bclk_rate, &mra,
+ &rate);
+ if (ret) {
+ dev_err(dev->dev,
+ "unable to configure the divisors: %d\n", ret);
+ return ret;
+ }
+ }
+
+ /* enable FIFO if available */
+ if (dev->soc->has_fifo)
+ mrb |= MCHP_I2SMCC_MRB_FIFOEN;
+
+ /*
+ * If we are already running, the wanted setup must be
+ * the same with the one that's currently ongoing
+ */
+ if (mchp_i2s_mcc_is_running(dev)) {
+ u32 mra_cur;
+ u32 mrb_cur;
+
+ regmap_read(dev->regmap, MCHP_I2SMCC_MRA, &mra_cur);
+ regmap_read(dev->regmap, MCHP_I2SMCC_MRB, &mrb_cur);
+ if (mra != mra_cur || mrb != mrb_cur)
+ return -EINVAL;
+
+ return 0;
+ }
+
+ if (mra & MCHP_I2SMCC_MRA_SRCCLK_GCLK && !dev->gclk_use) {
+ /* set the rate */
+ ret = clk_set_rate(dev->gclk, rate);
+ if (ret) {
+ dev_err(dev->dev,
+ "unable to set rate %lu to GCLK: %d\n",
+ rate, ret);
+ return ret;
+ }
+
+ ret = clk_prepare(dev->gclk);
+ if (ret < 0) {
+ dev_err(dev->dev, "unable to prepare GCLK: %d\n", ret);
+ return ret;
+ }
+ dev->gclk_use = 1;
+ }
+
+ /* Save the number of channels to know what interrupts to enable */
+ dev->channels = channels;
+
+ ret = regmap_write(dev->regmap, MCHP_I2SMCC_MRA, mra);
+ if (ret < 0) {
+ if (dev->gclk_use) {
+ clk_unprepare(dev->gclk);
+ dev->gclk_use = 0;
+ }
+ return ret;
+ }
+ return regmap_write(dev->regmap, MCHP_I2SMCC_MRB, mrb);
+}
+
+static int mchp_i2s_mcc_hw_free(struct snd_pcm_substream *substream,
+ struct snd_soc_dai *dai)
+{
+ struct mchp_i2s_mcc_dev *dev = snd_soc_dai_get_drvdata(dai);
+ bool is_playback = (substream->stream == SNDRV_PCM_STREAM_PLAYBACK);
+ long err;
+
+ if (is_playback) {
+ err = wait_event_interruptible_timeout(dev->wq_txrdy,
+ dev->tx_rdy,
+ msecs_to_jiffies(500));
+ if (err == 0) {
+ dev_warn_once(dev->dev,
+ "Timeout waiting for Tx ready\n");
+ if (dev->soc->has_fifo)
+ regmap_write(dev->regmap, MCHP_I2SMCC_IDRB,
+ MCHP_I2SMCC_INT_TXFFRDY);
+ else
+ regmap_write(dev->regmap, MCHP_I2SMCC_IDRA,
+ MCHP_I2SMCC_INT_TXRDY_MASK(dev->channels));
+
+ dev->tx_rdy = 1;
+ }
+ } else {
+ err = wait_event_interruptible_timeout(dev->wq_rxrdy,
+ dev->rx_rdy,
+ msecs_to_jiffies(500));
+ if (err == 0) {
+ dev_warn_once(dev->dev,
+ "Timeout waiting for Rx ready\n");
+ if (dev->soc->has_fifo)
+ regmap_write(dev->regmap, MCHP_I2SMCC_IDRB,
+ MCHP_I2SMCC_INT_RXFFRDY);
+ else
+ regmap_write(dev->regmap, MCHP_I2SMCC_IDRA,
+ MCHP_I2SMCC_INT_RXRDY_MASK(dev->channels));
+ dev->rx_rdy = 1;
+ }
+ }
+
+ if (!mchp_i2s_mcc_is_running(dev)) {
+ regmap_write(dev->regmap, MCHP_I2SMCC_CR, MCHP_I2SMCC_CR_CKDIS);
+
+ if (dev->gclk_running) {
+ clk_disable(dev->gclk);
+ dev->gclk_running = 0;
+ }
+ if (dev->gclk_use) {
+ clk_unprepare(dev->gclk);
+ dev->gclk_use = 0;
+ }
+ }
+
+ return 0;
+}
+
+static int mchp_i2s_mcc_trigger(struct snd_pcm_substream *substream, int cmd,
+ struct snd_soc_dai *dai)
+{
+ struct mchp_i2s_mcc_dev *dev = snd_soc_dai_get_drvdata(dai);
+ bool is_playback = (substream->stream == SNDRV_PCM_STREAM_PLAYBACK);
+ u32 cr = 0;
+ u32 iera = 0, ierb = 0;
+ u32 sr;
+ int err;
+
+ switch (cmd) {
+ case SNDRV_PCM_TRIGGER_START:
+ case SNDRV_PCM_TRIGGER_RESUME:
+ case SNDRV_PCM_TRIGGER_PAUSE_RELEASE:
+ if (is_playback)
+ cr = MCHP_I2SMCC_CR_TXEN | MCHP_I2SMCC_CR_CKEN;
+ else
+ cr = MCHP_I2SMCC_CR_RXEN | MCHP_I2SMCC_CR_CKEN;
+ break;
+ case SNDRV_PCM_TRIGGER_STOP:
+ case SNDRV_PCM_TRIGGER_SUSPEND:
+ case SNDRV_PCM_TRIGGER_PAUSE_PUSH:
+ regmap_read(dev->regmap, MCHP_I2SMCC_SR, &sr);
+ if (is_playback && (sr & MCHP_I2SMCC_SR_TXEN)) {
+ cr = MCHP_I2SMCC_CR_TXDIS;
+ dev->tx_rdy = 0;
+ /*
+ * Enable Tx Ready interrupts on all channels
+ * to assure all data is sent
+ */
+ if (dev->soc->has_fifo)
+ ierb = MCHP_I2SMCC_INT_TXFFRDY;
+ else
+ iera = MCHP_I2SMCC_INT_TXRDY_MASK(dev->channels);
+ } else if (!is_playback && (sr & MCHP_I2SMCC_SR_RXEN)) {
+ cr = MCHP_I2SMCC_CR_RXDIS;
+ dev->rx_rdy = 0;
+ /*
+ * Enable Rx Ready interrupts on all channels
+ * to assure all data is received
+ */
+ if (dev->soc->has_fifo)
+ ierb = MCHP_I2SMCC_INT_RXFFRDY;
+ else
+ iera = MCHP_I2SMCC_INT_RXRDY_MASK(dev->channels);
+ }
+ break;
+ default:
+ return -EINVAL;
+ }
+
+ if ((cr & MCHP_I2SMCC_CR_CKEN) && dev->gclk_use &&
+ !dev->gclk_running) {
+ err = clk_enable(dev->gclk);
+ if (err) {
+ dev_err_once(dev->dev, "failed to enable GCLK: %d\n",
+ err);
+ } else {
+ dev->gclk_running = 1;
+ }
+ }
+
+ if (dev->soc->has_fifo)
+ regmap_write(dev->regmap, MCHP_I2SMCC_IERB, ierb);
+ else
+ regmap_write(dev->regmap, MCHP_I2SMCC_IERA, iera);
+ regmap_write(dev->regmap, MCHP_I2SMCC_CR, cr);
+
+ return 0;
+}
+
+static int mchp_i2s_mcc_startup(struct snd_pcm_substream *substream,
+ struct snd_soc_dai *dai)
+{
+ struct mchp_i2s_mcc_dev *dev = snd_soc_dai_get_drvdata(dai);
+
+ /* Software reset the IP if it's not running */
+ if (!mchp_i2s_mcc_is_running(dev)) {
+ return regmap_write(dev->regmap, MCHP_I2SMCC_CR,
+ MCHP_I2SMCC_CR_SWRST);
+ }
+
+ return 0;
+}
+
+static const struct snd_soc_dai_ops mchp_i2s_mcc_dai_ops = {
+ .set_sysclk = mchp_i2s_mcc_set_sysclk,
+ .set_bclk_ratio = mchp_i2s_mcc_set_bclk_ratio,
+ .startup = mchp_i2s_mcc_startup,
+ .trigger = mchp_i2s_mcc_trigger,
+ .hw_params = mchp_i2s_mcc_hw_params,
+ .hw_free = mchp_i2s_mcc_hw_free,
+ .set_fmt = mchp_i2s_mcc_set_dai_fmt,
+ .set_tdm_slot = mchp_i2s_mcc_set_dai_tdm_slot,
+};
+
+static int mchp_i2s_mcc_dai_probe(struct snd_soc_dai *dai)
+{
+ struct mchp_i2s_mcc_dev *dev = snd_soc_dai_get_drvdata(dai);
+
+ init_waitqueue_head(&dev->wq_txrdy);
+ init_waitqueue_head(&dev->wq_rxrdy);
+ dev->tx_rdy = 1;
+ dev->rx_rdy = 1;
+
+ snd_soc_dai_init_dma_data(dai, &dev->playback, &dev->capture);
+
+ return 0;
+}
+
+#define MCHP_I2SMCC_RATES SNDRV_PCM_RATE_8000_192000
+
+#define MCHP_I2SMCC_FORMATS (SNDRV_PCM_FMTBIT_S8 | \
+ SNDRV_PCM_FMTBIT_S16_LE | \
+ SNDRV_PCM_FMTBIT_S18_3LE | \
+ SNDRV_PCM_FMTBIT_S20_3LE | \
+ SNDRV_PCM_FMTBIT_S24_3LE | \
+ SNDRV_PCM_FMTBIT_S24_LE | \
+ SNDRV_PCM_FMTBIT_S32_LE)
+
+static struct snd_soc_dai_driver mchp_i2s_mcc_dai = {
+ .probe = mchp_i2s_mcc_dai_probe,
+ .playback = {
+ .stream_name = "I2SMCC-Playback",
+ .channels_min = 1,
+ .channels_max = 8,
+ .rates = MCHP_I2SMCC_RATES,
+ .formats = MCHP_I2SMCC_FORMATS,
+ },
+ .capture = {
+ .stream_name = "I2SMCC-Capture",
+ .channels_min = 1,
+ .channels_max = 8,
+ .rates = MCHP_I2SMCC_RATES,
+ .formats = MCHP_I2SMCC_FORMATS,
+ },
+ .ops = &mchp_i2s_mcc_dai_ops,
+ .symmetric_rate = 1,
+ .symmetric_sample_bits = 1,
+ .symmetric_channels = 1,
+};
+
+static const struct snd_soc_component_driver mchp_i2s_mcc_component = {
+ .name = "mchp-i2s-mcc",
+ .legacy_dai_naming = 1,
+};
+
+#ifdef CONFIG_OF
+static struct mchp_i2s_mcc_soc_data mchp_i2s_mcc_sam9x60 = {
+ .data_pin_pair_num = 1,
+};
+
+static struct mchp_i2s_mcc_soc_data mchp_i2s_mcc_sama7g5 = {
+ .data_pin_pair_num = 4,
+ .has_fifo = true,
+};
+
+static const struct of_device_id mchp_i2s_mcc_dt_ids[] = {
+ {
+ .compatible = "microchip,sam9x60-i2smcc",
+ .data = &mchp_i2s_mcc_sam9x60,
+ },
+ {
+ .compatible = "microchip,sama7g5-i2smcc",
+ .data = &mchp_i2s_mcc_sama7g5,
+ },
+ { /* sentinel */ }
+};
+MODULE_DEVICE_TABLE(of, mchp_i2s_mcc_dt_ids);
+#endif
+
+static int mchp_i2s_mcc_soc_data_parse(struct platform_device *pdev,
+ struct mchp_i2s_mcc_dev *dev)
+{
+ int err;
+
+ if (!dev->soc) {
+ dev_err(&pdev->dev, "failed to get soc data\n");
+ return -ENODEV;
+ }
+
+ if (dev->soc->data_pin_pair_num == 1)
+ return 0;
+
+ err = of_property_read_u8(pdev->dev.of_node, "microchip,tdm-data-pair",
+ &dev->tdm_data_pair);
+ if (err < 0 && err != -EINVAL) {
+ dev_err(&pdev->dev,
+ "bad property data for 'microchip,tdm-data-pair': %d",
+ err);
+ return err;
+ }
+ if (err == -EINVAL) {
+ dev_info(&pdev->dev,
+ "'microchip,tdm-data-pair' not found; assuming DIN/DOUT 0 for TDM\n");
+ dev->tdm_data_pair = 0;
+ } else {
+ if (dev->tdm_data_pair > dev->soc->data_pin_pair_num - 1) {
+ dev_err(&pdev->dev,
+ "invalid value for 'microchip,tdm-data-pair': %d\n",
+ dev->tdm_data_pair);
+ return -EINVAL;
+ }
+ dev_dbg(&pdev->dev, "TMD format on DIN/DOUT %d pins\n",
+ dev->tdm_data_pair);
+ }
+
+ return 0;
+}
+
+static int mchp_i2s_mcc_probe(struct platform_device *pdev)
+{
+ struct mchp_i2s_mcc_dev *dev;
+ struct resource *mem;
+ struct regmap *regmap;
+ void __iomem *base;
+ u32 version;
+ int irq;
+ int err;
+
+ dev = devm_kzalloc(&pdev->dev, sizeof(*dev), GFP_KERNEL);
+ if (!dev)
+ return -ENOMEM;
+
+ base = devm_platform_get_and_ioremap_resource(pdev, 0, &mem);
+ if (IS_ERR(base))
+ return PTR_ERR(base);
+
+ regmap = devm_regmap_init_mmio(&pdev->dev, base,
+ &mchp_i2s_mcc_regmap_config);
+ if (IS_ERR(regmap))
+ return PTR_ERR(regmap);
+
+ irq = platform_get_irq(pdev, 0);
+ if (irq < 0)
+ return irq;
+
+ err = devm_request_irq(&pdev->dev, irq, mchp_i2s_mcc_interrupt, 0,
+ dev_name(&pdev->dev), dev);
+ if (err)
+ return err;
+
+ dev->pclk = devm_clk_get(&pdev->dev, "pclk");
+ if (IS_ERR(dev->pclk)) {
+ err = PTR_ERR(dev->pclk);
+ dev_err(&pdev->dev,
+ "failed to get the peripheral clock: %d\n", err);
+ return err;
+ }
+
+ /* Get the optional generated clock */
+ dev->gclk = devm_clk_get(&pdev->dev, "gclk");
+ if (IS_ERR(dev->gclk)) {
+ if (PTR_ERR(dev->gclk) == -EPROBE_DEFER)
+ return -EPROBE_DEFER;
+ dev_warn(&pdev->dev,
+ "generated clock not found: %d\n", err);
+ dev->gclk = NULL;
+ }
+
+ dev->soc = of_device_get_match_data(&pdev->dev);
+ err = mchp_i2s_mcc_soc_data_parse(pdev, dev);
+ if (err < 0)
+ return err;
+
+ dev->dev = &pdev->dev;
+ dev->regmap = regmap;
+ platform_set_drvdata(pdev, dev);
+
+ err = clk_prepare_enable(dev->pclk);
+ if (err) {
+ dev_err(&pdev->dev,
+ "failed to enable the peripheral clock: %d\n", err);
+ return err;
+ }
+
+ err = devm_snd_soc_register_component(&pdev->dev,
+ &mchp_i2s_mcc_component,
+ &mchp_i2s_mcc_dai, 1);
+ if (err) {
+ dev_err(&pdev->dev, "failed to register DAI: %d\n", err);
+ clk_disable_unprepare(dev->pclk);
+ return err;
+ }
+
+ dev->playback.addr = (dma_addr_t)mem->start + MCHP_I2SMCC_THR;
+ dev->capture.addr = (dma_addr_t)mem->start + MCHP_I2SMCC_RHR;
+
+ err = devm_snd_dmaengine_pcm_register(&pdev->dev, NULL, 0);
+ if (err) {
+ dev_err(&pdev->dev, "failed to register PCM: %d\n", err);
+ clk_disable_unprepare(dev->pclk);
+ return err;
+ }
+
+ /* Get IP version. */
+ regmap_read(dev->regmap, MCHP_I2SMCC_VERSION, &version);
+ dev_info(&pdev->dev, "hw version: %#lx\n",
+ version & MCHP_I2SMCC_VERSION_MASK);
+
+ return 0;
+}
+
+static int mchp_i2s_mcc_remove(struct platform_device *pdev)
+{
+ struct mchp_i2s_mcc_dev *dev = platform_get_drvdata(pdev);
+
+ clk_disable_unprepare(dev->pclk);
+
+ return 0;
+}
+
+static struct platform_driver mchp_i2s_mcc_driver = {
+ .driver = {
+ .name = "mchp_i2s_mcc",
+ .of_match_table = of_match_ptr(mchp_i2s_mcc_dt_ids),
+ },
+ .probe = mchp_i2s_mcc_probe,
+ .remove = mchp_i2s_mcc_remove,
+};
+module_platform_driver(mchp_i2s_mcc_driver);
+
+MODULE_DESCRIPTION("Microchip I2S Multi-Channel Controller driver");
+MODULE_AUTHOR("Codrin Ciubotariu <codrin.ciubotariu@microchip.com>");
+MODULE_LICENSE("GPL v2");
diff --git a/sound/soc/atmel/mchp-pdmc.c b/sound/soc/atmel/mchp-pdmc.c
new file mode 100644
index 000000000..44aefbd5b
--- /dev/null
+++ b/sound/soc/atmel/mchp-pdmc.c
@@ -0,0 +1,1085 @@
+// SPDX-License-Identifier: GPL-2.0
+//
+// Driver for Microchip Pulse Density Microphone Controller (PDMC) interfaces
+//
+// Copyright (C) 2019-2022 Microchip Technology Inc. and its subsidiaries
+//
+// Author: Codrin Ciubotariu <codrin.ciubotariu@microchip.com>
+
+#include <dt-bindings/sound/microchip,pdmc.h>
+
+#include <linux/clk.h>
+#include <linux/module.h>
+#include <linux/of.h>
+#include <linux/regmap.h>
+
+#include <sound/core.h>
+#include <sound/dmaengine_pcm.h>
+#include <sound/pcm_params.h>
+#include <sound/tlv.h>
+
+/*
+ * ---- PDMC Register map ----
+ */
+#define MCHP_PDMC_CR 0x00 /* Control Register */
+#define MCHP_PDMC_MR 0x04 /* Mode Register */
+#define MCHP_PDMC_CFGR 0x08 /* Configuration Register */
+#define MCHP_PDMC_RHR 0x0C /* Receive Holding Register */
+#define MCHP_PDMC_IER 0x14 /* Interrupt Enable Register */
+#define MCHP_PDMC_IDR 0x18 /* Interrupt Disable Register */
+#define MCHP_PDMC_IMR 0x1C /* Interrupt Mask Register */
+#define MCHP_PDMC_ISR 0x20 /* Interrupt Status Register */
+#define MCHP_PDMC_VER 0x50 /* Version Register */
+
+/*
+ * ---- Control Register (Write-only) ----
+ */
+#define MCHP_PDMC_CR_SWRST BIT(0) /* Software Reset */
+
+/*
+ * ---- Mode Register (Read/Write) ----
+ */
+#define MCHP_PDMC_MR_PDMCEN_MASK GENMASK(3, 0)
+#define MCHP_PDMC_MR_PDMCEN(ch) (BIT(ch) & MCHP_PDMC_MR_PDMCEN_MASK)
+
+#define MCHP_PDMC_MR_OSR_MASK GENMASK(17, 16)
+#define MCHP_PDMC_MR_OSR64 (1 << 16)
+#define MCHP_PDMC_MR_OSR128 (2 << 16)
+#define MCHP_PDMC_MR_OSR256 (3 << 16)
+
+#define MCHP_PDMC_MR_SINCORDER_MASK GENMASK(23, 20)
+#define MCHP_PDMC_MR_SINCORDER(order) (((order) << 20) & \
+ MCHP_PDMC_MR_SINCORDER_MASK)
+
+#define MCHP_PDMC_MR_SINC_OSR_MASK GENMASK(27, 24)
+#define MCHP_PDMC_MR_SINC_OSR_DIS (0 << 24)
+#define MCHP_PDMC_MR_SINC_OSR_8 (1 << 24)
+#define MCHP_PDMC_MR_SINC_OSR_16 (2 << 24)
+#define MCHP_PDMC_MR_SINC_OSR_32 (3 << 24)
+#define MCHP_PDMC_MR_SINC_OSR_64 (4 << 24)
+#define MCHP_PDMC_MR_SINC_OSR_128 (5 << 24)
+#define MCHP_PDMC_MR_SINC_OSR_256 (6 << 24)
+
+#define MCHP_PDMC_MR_CHUNK_MASK GENMASK(31, 28)
+#define MCHP_PDMC_MR_CHUNK(chunk) (((chunk) << 28) & \
+ MCHP_PDMC_MR_CHUNK_MASK)
+
+/*
+ * ---- Configuration Register (Read/Write) ----
+ */
+#define MCHP_PDMC_CFGR_BSSEL_MASK (BIT(0) | BIT(2) | BIT(4) | BIT(6))
+#define MCHP_PDMC_CFGR_BSSEL(ch) BIT((ch) * 2)
+
+#define MCHP_PDMC_CFGR_PDMSEL_MASK (BIT(16) | BIT(18) | BIT(20) | BIT(22))
+#define MCHP_PDMC_CFGR_PDMSEL(ch) BIT((ch) * 2 + 16)
+
+/*
+ * ---- Interrupt Enable/Disable/Mask/Status Registers ----
+ */
+#define MCHP_PDMC_IR_RXRDY BIT(0)
+#define MCHP_PDMC_IR_RXEMPTY BIT(1)
+#define MCHP_PDMC_IR_RXFULL BIT(2)
+#define MCHP_PDMC_IR_RXCHUNK BIT(3)
+#define MCHP_PDMC_IR_RXUDR BIT(4)
+#define MCHP_PDMC_IR_RXOVR BIT(5)
+
+/*
+ * ---- Version Register (Read-only) ----
+ */
+#define MCHP_PDMC_VER_VERSION GENMASK(11, 0)
+
+#define MCHP_PDMC_MAX_CHANNELS 4
+#define MCHP_PDMC_DS_NO 2
+#define MCHP_PDMC_EDGE_NO 2
+
+struct mic_map {
+ int ds_pos;
+ int clk_edge;
+};
+
+struct mchp_pdmc_chmap {
+ struct snd_pcm_chmap_elem *chmap;
+ struct mchp_pdmc *dd;
+ struct snd_pcm *pcm;
+ struct snd_kcontrol *kctl;
+};
+
+struct mchp_pdmc {
+ struct mic_map channel_mic_map[MCHP_PDMC_MAX_CHANNELS];
+ struct device *dev;
+ struct snd_dmaengine_dai_dma_data addr;
+ struct regmap *regmap;
+ struct clk *pclk;
+ struct clk *gclk;
+ u32 pdmcen;
+ int mic_no;
+ int sinc_order;
+ bool audio_filter_en;
+ u8 gclk_enabled:1;
+};
+
+static const char *const mchp_pdmc_sinc_filter_order_text[] = {
+ "1", "2", "3", "4", "5"
+};
+
+static const unsigned int mchp_pdmc_sinc_filter_order_values[] = {
+ 1, 2, 3, 4, 5,
+};
+
+static const struct soc_enum mchp_pdmc_sinc_filter_order_enum = {
+ .items = ARRAY_SIZE(mchp_pdmc_sinc_filter_order_text),
+ .texts = mchp_pdmc_sinc_filter_order_text,
+ .values = mchp_pdmc_sinc_filter_order_values,
+};
+
+static int mchp_pdmc_sinc_order_get(struct snd_kcontrol *kcontrol,
+ struct snd_ctl_elem_value *uvalue)
+{
+ struct snd_soc_component *component = snd_kcontrol_chip(kcontrol);
+ struct mchp_pdmc *dd = snd_soc_component_get_drvdata(component);
+ struct soc_enum *e = (struct soc_enum *)kcontrol->private_value;
+ unsigned int item;
+
+ item = snd_soc_enum_val_to_item(e, dd->sinc_order);
+ uvalue->value.enumerated.item[0] = item;
+
+ return 0;
+}
+
+static int mchp_pdmc_sinc_order_put(struct snd_kcontrol *kcontrol,
+ struct snd_ctl_elem_value *uvalue)
+{
+ struct snd_soc_component *component = snd_kcontrol_chip(kcontrol);
+ struct mchp_pdmc *dd = snd_soc_component_get_drvdata(component);
+ struct soc_enum *e = (struct soc_enum *)kcontrol->private_value;
+ unsigned int *item = uvalue->value.enumerated.item;
+ unsigned int val;
+
+ if (item[0] >= e->items)
+ return -EINVAL;
+
+ val = snd_soc_enum_item_to_val(e, item[0]) << e->shift_l;
+ if (val == dd->sinc_order)
+ return 0;
+
+ dd->sinc_order = val;
+
+ return 1;
+}
+
+static int mchp_pdmc_af_get(struct snd_kcontrol *kcontrol,
+ struct snd_ctl_elem_value *uvalue)
+{
+ struct snd_soc_component *component = snd_kcontrol_chip(kcontrol);
+ struct mchp_pdmc *dd = snd_soc_component_get_drvdata(component);
+
+ uvalue->value.integer.value[0] = !!dd->audio_filter_en;
+
+ return 0;
+}
+
+static int mchp_pdmc_af_put(struct snd_kcontrol *kcontrol,
+ struct snd_ctl_elem_value *uvalue)
+{
+ struct snd_soc_component *component = snd_kcontrol_chip(kcontrol);
+ struct mchp_pdmc *dd = snd_soc_component_get_drvdata(component);
+ bool af = uvalue->value.integer.value[0] ? true : false;
+
+ if (dd->audio_filter_en == af)
+ return 0;
+
+ dd->audio_filter_en = af;
+
+ return 1;
+}
+
+static int mchp_pdmc_chmap_ctl_info(struct snd_kcontrol *kcontrol, struct snd_ctl_elem_info *uinfo)
+{
+ struct mchp_pdmc_chmap *info = snd_kcontrol_chip(kcontrol);
+
+ uinfo->type = SNDRV_CTL_ELEM_TYPE_INTEGER;
+ uinfo->count = info->dd->mic_no;
+ uinfo->value.integer.min = 0;
+ uinfo->value.integer.max = SNDRV_CHMAP_RR; /* maxmimum 4 channels */
+ return 0;
+}
+
+static inline struct snd_pcm_substream *
+mchp_pdmc_chmap_substream(struct mchp_pdmc_chmap *info, unsigned int idx)
+{
+ struct snd_pcm_substream *s;
+
+ for (s = info->pcm->streams[SNDRV_PCM_STREAM_CAPTURE].substream; s; s = s->next)
+ if (s->number == idx)
+ return s;
+ return NULL;
+}
+
+static struct snd_pcm_chmap_elem *mchp_pdmc_chmap_get(struct snd_pcm_substream *substream,
+ struct mchp_pdmc_chmap *ch_info)
+{
+ struct snd_pcm_chmap_elem *map;
+
+ for (map = ch_info->chmap; map->channels; map++) {
+ if (map->channels == substream->runtime->channels)
+ return map;
+ }
+ return NULL;
+}
+
+static int mchp_pdmc_chmap_ctl_get(struct snd_kcontrol *kcontrol,
+ struct snd_ctl_elem_value *ucontrol)
+{
+ struct mchp_pdmc_chmap *info = snd_kcontrol_chip(kcontrol);
+ struct mchp_pdmc *dd = info->dd;
+ unsigned int idx = snd_ctl_get_ioffidx(kcontrol, &ucontrol->id);
+ struct snd_pcm_substream *substream;
+ const struct snd_pcm_chmap_elem *map;
+ int i;
+ u32 cfgr_val = 0;
+
+ if (!info->chmap)
+ return -EINVAL;
+ substream = mchp_pdmc_chmap_substream(info, idx);
+ if (!substream)
+ return -ENODEV;
+ memset(ucontrol->value.integer.value, 0, sizeof(long) * info->dd->mic_no);
+ if (!substream->runtime)
+ return 0; /* no channels set */
+
+ map = mchp_pdmc_chmap_get(substream, info);
+ if (!map)
+ return -EINVAL;
+
+ for (i = 0; i < map->channels; i++) {
+ int map_idx = map->channels == 1 ? map->map[i] - SNDRV_CHMAP_MONO :
+ map->map[i] - SNDRV_CHMAP_FL;
+
+ /* make sure the reported channel map is the real one, so write the map */
+ if (dd->channel_mic_map[map_idx].ds_pos)
+ cfgr_val |= MCHP_PDMC_CFGR_PDMSEL(i);
+ if (dd->channel_mic_map[map_idx].clk_edge)
+ cfgr_val |= MCHP_PDMC_CFGR_BSSEL(i);
+
+ ucontrol->value.integer.value[i] = map->map[i];
+ }
+
+ regmap_write(dd->regmap, MCHP_PDMC_CFGR, cfgr_val);
+
+ return 0;
+}
+
+static int mchp_pdmc_chmap_ctl_put(struct snd_kcontrol *kcontrol,
+ struct snd_ctl_elem_value *ucontrol)
+{
+ struct mchp_pdmc_chmap *info = snd_kcontrol_chip(kcontrol);
+ struct mchp_pdmc *dd = info->dd;
+ unsigned int idx = snd_ctl_get_ioffidx(kcontrol, &ucontrol->id);
+ struct snd_pcm_substream *substream;
+ struct snd_pcm_chmap_elem *map;
+ u32 cfgr_val = 0;
+ int i;
+
+ if (!info->chmap)
+ return -EINVAL;
+ substream = mchp_pdmc_chmap_substream(info, idx);
+ if (!substream)
+ return -ENODEV;
+
+ map = mchp_pdmc_chmap_get(substream, info);
+ if (!map)
+ return -EINVAL;
+
+ for (i = 0; i < map->channels; i++) {
+ int map_idx;
+
+ map->map[i] = ucontrol->value.integer.value[i];
+ map_idx = map->channels == 1 ? map->map[i] - SNDRV_CHMAP_MONO :
+ map->map[i] - SNDRV_CHMAP_FL;
+
+ /* configure IP for the desired channel map */
+ if (dd->channel_mic_map[map_idx].ds_pos)
+ cfgr_val |= MCHP_PDMC_CFGR_PDMSEL(i);
+ if (dd->channel_mic_map[map_idx].clk_edge)
+ cfgr_val |= MCHP_PDMC_CFGR_BSSEL(i);
+ }
+
+ regmap_write(dd->regmap, MCHP_PDMC_CFGR, cfgr_val);
+
+ return 0;
+}
+
+static void mchp_pdmc_chmap_ctl_private_free(struct snd_kcontrol *kcontrol)
+{
+ struct mchp_pdmc_chmap *info = snd_kcontrol_chip(kcontrol);
+
+ info->pcm->streams[SNDRV_PCM_STREAM_CAPTURE].chmap_kctl = NULL;
+ kfree(info);
+}
+
+static int mchp_pdmc_chmap_ctl_tlv(struct snd_kcontrol *kcontrol, int op_flag,
+ unsigned int size, unsigned int __user *tlv)
+{
+ struct mchp_pdmc_chmap *info = snd_kcontrol_chip(kcontrol);
+ const struct snd_pcm_chmap_elem *map;
+ unsigned int __user *dst;
+ int c, count = 0;
+
+ if (!info->chmap)
+ return -EINVAL;
+ if (size < 8)
+ return -ENOMEM;
+ if (put_user(SNDRV_CTL_TLVT_CONTAINER, tlv))
+ return -EFAULT;
+ size -= 8;
+ dst = tlv + 2;
+ for (map = info->chmap; map->channels; map++) {
+ int chs_bytes = map->channels * 4;
+
+ if (size < 8)
+ return -ENOMEM;
+ if (put_user(SNDRV_CTL_TLVT_CHMAP_VAR, dst) ||
+ put_user(chs_bytes, dst + 1))
+ return -EFAULT;
+ dst += 2;
+ size -= 8;
+ count += 8;
+ if (size < chs_bytes)
+ return -ENOMEM;
+ size -= chs_bytes;
+ count += chs_bytes;
+ for (c = 0; c < map->channels; c++) {
+ if (put_user(map->map[c], dst))
+ return -EFAULT;
+ dst++;
+ }
+ }
+ if (put_user(count, tlv + 1))
+ return -EFAULT;
+ return 0;
+}
+
+static const struct snd_kcontrol_new mchp_pdmc_snd_controls[] = {
+ SOC_SINGLE_BOOL_EXT("Audio Filter", 0, &mchp_pdmc_af_get, &mchp_pdmc_af_put),
+ {
+ .iface = SNDRV_CTL_ELEM_IFACE_MIXER,
+ .name = "SINC Filter Order",
+ .info = snd_soc_info_enum_double,
+ .get = mchp_pdmc_sinc_order_get,
+ .put = mchp_pdmc_sinc_order_put,
+ .private_value = (unsigned long)&mchp_pdmc_sinc_filter_order_enum,
+ },
+};
+
+static int mchp_pdmc_close(struct snd_soc_component *component,
+ struct snd_pcm_substream *substream)
+{
+ return snd_soc_add_component_controls(component, mchp_pdmc_snd_controls,
+ ARRAY_SIZE(mchp_pdmc_snd_controls));
+}
+
+static int mchp_pdmc_open(struct snd_soc_component *component,
+ struct snd_pcm_substream *substream)
+{
+ int i;
+
+ /* remove controls that can't be changed at runtime */
+ for (i = 0; i < ARRAY_SIZE(mchp_pdmc_snd_controls); i++) {
+ const struct snd_kcontrol_new *control = &mchp_pdmc_snd_controls[i];
+ struct snd_ctl_elem_id id;
+ struct snd_kcontrol *kctl;
+ int err;
+
+ if (component->name_prefix)
+ snprintf(id.name, sizeof(id.name), "%s %s", component->name_prefix,
+ control->name);
+ else
+ strscpy(id.name, control->name, sizeof(id.name));
+
+ id.numid = 0;
+ id.iface = control->iface;
+ id.device = control->device;
+ id.subdevice = control->subdevice;
+ id.index = control->index;
+ kctl = snd_ctl_find_id(component->card->snd_card, &id);
+ if (!kctl) {
+ dev_err(component->dev, "Failed to find %s\n", control->name);
+ continue;
+ }
+ err = snd_ctl_remove(component->card->snd_card, kctl);
+ if (err < 0) {
+ dev_err(component->dev, "%d: Failed to remove %s\n", err,
+ control->name);
+ continue;
+ }
+ }
+
+ return 0;
+}
+
+static const struct snd_soc_component_driver mchp_pdmc_dai_component = {
+ .name = "mchp-pdmc",
+ .controls = mchp_pdmc_snd_controls,
+ .num_controls = ARRAY_SIZE(mchp_pdmc_snd_controls),
+ .open = &mchp_pdmc_open,
+ .close = &mchp_pdmc_close,
+ .legacy_dai_naming = 1,
+};
+
+static const unsigned int mchp_pdmc_1mic[] = {1};
+static const unsigned int mchp_pdmc_2mic[] = {1, 2};
+static const unsigned int mchp_pdmc_3mic[] = {1, 2, 3};
+static const unsigned int mchp_pdmc_4mic[] = {1, 2, 3, 4};
+
+static const struct snd_pcm_hw_constraint_list mchp_pdmc_chan_constr[] = {
+ {
+ .list = mchp_pdmc_1mic,
+ .count = ARRAY_SIZE(mchp_pdmc_1mic),
+ },
+ {
+ .list = mchp_pdmc_2mic,
+ .count = ARRAY_SIZE(mchp_pdmc_2mic),
+ },
+ {
+ .list = mchp_pdmc_3mic,
+ .count = ARRAY_SIZE(mchp_pdmc_3mic),
+ },
+ {
+ .list = mchp_pdmc_4mic,
+ .count = ARRAY_SIZE(mchp_pdmc_4mic),
+ },
+};
+
+static int mchp_pdmc_startup(struct snd_pcm_substream *substream,
+ struct snd_soc_dai *dai)
+{
+ struct mchp_pdmc *dd = snd_soc_dai_get_drvdata(dai);
+ int ret;
+
+ ret = clk_prepare_enable(dd->pclk);
+ if (ret) {
+ dev_err(dd->dev, "failed to enable the peripheral clock: %d\n", ret);
+ return ret;
+ }
+
+ regmap_write(dd->regmap, MCHP_PDMC_CR, MCHP_PDMC_CR_SWRST);
+
+ snd_pcm_hw_constraint_list(substream->runtime, 0, SNDRV_PCM_HW_PARAM_CHANNELS,
+ &mchp_pdmc_chan_constr[dd->mic_no - 1]);
+
+ return 0;
+}
+
+static void mchp_pdmc_shutdown(struct snd_pcm_substream *substream,
+ struct snd_soc_dai *dai)
+{
+ struct mchp_pdmc *dd = snd_soc_dai_get_drvdata(dai);
+
+ clk_disable_unprepare(dd->pclk);
+}
+
+static int mchp_pdmc_dai_probe(struct snd_soc_dai *dai)
+{
+ struct mchp_pdmc *dd = snd_soc_dai_get_drvdata(dai);
+
+ snd_soc_dai_init_dma_data(dai, NULL, &dd->addr);
+
+ return 0;
+}
+
+static int mchp_pdmc_set_fmt(struct snd_soc_dai *dai, unsigned int fmt)
+{
+ unsigned int fmt_master = fmt & SND_SOC_DAIFMT_MASTER_MASK;
+ unsigned int fmt_format = fmt & SND_SOC_DAIFMT_FORMAT_MASK;
+
+ /* IP needs to be bitclock master */
+ if (fmt_master != SND_SOC_DAIFMT_BP_FP &&
+ fmt_master != SND_SOC_DAIFMT_BP_FC)
+ return -EINVAL;
+
+ /* IP supports only PDM interface */
+ if (fmt_format != SND_SOC_DAIFMT_PDM)
+ return -EINVAL;
+
+ return 0;
+}
+
+static u32 mchp_pdmc_mr_set_osr(int audio_filter_en, unsigned int osr)
+{
+ if (audio_filter_en) {
+ switch (osr) {
+ case 64:
+ return MCHP_PDMC_MR_OSR64;
+ case 128:
+ return MCHP_PDMC_MR_OSR128;
+ case 256:
+ return MCHP_PDMC_MR_OSR256;
+ }
+ } else {
+ switch (osr) {
+ case 8:
+ return MCHP_PDMC_MR_SINC_OSR_8;
+ case 16:
+ return MCHP_PDMC_MR_SINC_OSR_16;
+ case 32:
+ return MCHP_PDMC_MR_SINC_OSR_32;
+ case 64:
+ return MCHP_PDMC_MR_SINC_OSR_64;
+ case 128:
+ return MCHP_PDMC_MR_SINC_OSR_128;
+ case 256:
+ return MCHP_PDMC_MR_SINC_OSR_256;
+ }
+ }
+ return 0;
+}
+
+static inline int mchp_pdmc_period_to_maxburst(int period_size)
+{
+ if (!(period_size % 8))
+ return 8;
+ if (!(period_size % 4))
+ return 4;
+ if (!(period_size % 2))
+ return 2;
+ return 1;
+}
+
+static struct snd_pcm_chmap_elem mchp_pdmc_std_chmaps[] = {
+ { .channels = 1,
+ .map = { SNDRV_CHMAP_MONO } },
+ { .channels = 2,
+ .map = { SNDRV_CHMAP_FL, SNDRV_CHMAP_FR } },
+ { .channels = 3,
+ .map = { SNDRV_CHMAP_FL, SNDRV_CHMAP_FR,
+ SNDRV_CHMAP_RL } },
+ { .channels = 4,
+ .map = { SNDRV_CHMAP_FL, SNDRV_CHMAP_FR,
+ SNDRV_CHMAP_RL, SNDRV_CHMAP_RR } },
+ { }
+};
+
+static int mchp_pdmc_hw_params(struct snd_pcm_substream *substream,
+ struct snd_pcm_hw_params *params,
+ struct snd_soc_dai *dai)
+{
+ struct mchp_pdmc *dd = snd_soc_dai_get_drvdata(dai);
+ struct snd_soc_component *comp = dai->component;
+ unsigned long gclk_rate = 0;
+ unsigned long best_diff_rate = ~0UL;
+ unsigned int channels = params_channels(params);
+ unsigned int osr = 0, osr_start;
+ unsigned int fs = params_rate(params);
+ u32 mr_val = 0;
+ u32 cfgr_val = 0;
+ int i;
+ int ret;
+
+ dev_dbg(comp->dev, "%s() rate=%u format=%#x width=%u channels=%u\n",
+ __func__, params_rate(params), params_format(params),
+ params_width(params), params_channels(params));
+
+ if (channels > dd->mic_no) {
+ dev_err(comp->dev, "more channels %u than microphones %d\n",
+ channels, dd->mic_no);
+ return -EINVAL;
+ }
+
+ dd->pdmcen = 0;
+ for (i = 0; i < channels; i++) {
+ dd->pdmcen |= MCHP_PDMC_MR_PDMCEN(i);
+ if (dd->channel_mic_map[i].ds_pos)
+ cfgr_val |= MCHP_PDMC_CFGR_PDMSEL(i);
+ if (dd->channel_mic_map[i].clk_edge)
+ cfgr_val |= MCHP_PDMC_CFGR_BSSEL(i);
+ }
+
+ if (dd->gclk_enabled) {
+ clk_disable_unprepare(dd->gclk);
+ dd->gclk_enabled = 0;
+ }
+
+ for (osr_start = dd->audio_filter_en ? 64 : 8;
+ osr_start <= 256 && best_diff_rate; osr_start *= 2) {
+ long round_rate;
+ unsigned long diff_rate;
+
+ round_rate = clk_round_rate(dd->gclk,
+ (unsigned long)fs * 16 * osr_start);
+ if (round_rate < 0)
+ continue;
+ diff_rate = abs((fs * 16 * osr_start) - round_rate);
+ if (diff_rate < best_diff_rate) {
+ best_diff_rate = diff_rate;
+ osr = osr_start;
+ gclk_rate = fs * 16 * osr;
+ }
+ }
+ if (!gclk_rate) {
+ dev_err(comp->dev, "invalid sampling rate: %u\n", fs);
+ return -EINVAL;
+ }
+
+ /* set the rate */
+ ret = clk_set_rate(dd->gclk, gclk_rate);
+ if (ret) {
+ dev_err(comp->dev, "unable to set rate %lu to GCLK: %d\n",
+ gclk_rate, ret);
+ return ret;
+ }
+
+ mr_val |= mchp_pdmc_mr_set_osr(dd->audio_filter_en, osr);
+
+ mr_val |= MCHP_PDMC_MR_SINCORDER(dd->sinc_order);
+
+ dd->addr.maxburst = mchp_pdmc_period_to_maxburst(snd_pcm_lib_period_bytes(substream));
+ mr_val |= MCHP_PDMC_MR_CHUNK(dd->addr.maxburst);
+ dev_dbg(comp->dev, "maxburst set to %d\n", dd->addr.maxburst);
+
+ clk_prepare_enable(dd->gclk);
+ dd->gclk_enabled = 1;
+
+ snd_soc_component_update_bits(comp, MCHP_PDMC_MR,
+ MCHP_PDMC_MR_OSR_MASK |
+ MCHP_PDMC_MR_SINCORDER_MASK |
+ MCHP_PDMC_MR_SINC_OSR_MASK |
+ MCHP_PDMC_MR_CHUNK_MASK, mr_val);
+
+ snd_soc_component_write(comp, MCHP_PDMC_CFGR, cfgr_val);
+
+ return 0;
+}
+
+static int mchp_pdmc_hw_free(struct snd_pcm_substream *substream,
+ struct snd_soc_dai *dai)
+{
+ struct mchp_pdmc *dd = snd_soc_dai_get_drvdata(dai);
+
+ if (dd->gclk_enabled) {
+ clk_disable_unprepare(dd->gclk);
+ dd->gclk_enabled = 0;
+ }
+
+ return 0;
+}
+
+static int mchp_pdmc_trigger(struct snd_pcm_substream *substream,
+ int cmd, struct snd_soc_dai *dai)
+{
+ struct mchp_pdmc *dd = snd_soc_dai_get_drvdata(dai);
+ struct snd_soc_component *cpu = dai->component;
+#ifdef DEBUG
+ u32 val;
+#endif
+
+ switch (cmd) {
+ case SNDRV_PCM_TRIGGER_START:
+ case SNDRV_PCM_TRIGGER_RESUME:
+ case SNDRV_PCM_TRIGGER_PAUSE_RELEASE:
+ /* Enable overrun and underrun error interrupts */
+ regmap_write(dd->regmap, MCHP_PDMC_IER,
+ MCHP_PDMC_IR_RXOVR | MCHP_PDMC_IR_RXUDR);
+ snd_soc_component_update_bits(cpu, MCHP_PDMC_MR,
+ MCHP_PDMC_MR_PDMCEN_MASK,
+ dd->pdmcen);
+ break;
+ case SNDRV_PCM_TRIGGER_STOP:
+ case SNDRV_PCM_TRIGGER_SUSPEND:
+ case SNDRV_PCM_TRIGGER_PAUSE_PUSH:
+ /* Disable overrun and underrun error interrupts */
+ regmap_write(dd->regmap, MCHP_PDMC_IDR,
+ MCHP_PDMC_IR_RXOVR | MCHP_PDMC_IR_RXUDR);
+ snd_soc_component_update_bits(cpu, MCHP_PDMC_MR,
+ MCHP_PDMC_MR_PDMCEN_MASK, 0);
+ break;
+ default:
+ return -EINVAL;
+ }
+
+#ifdef DEBUG
+ regmap_read(dd->regmap, MCHP_PDMC_MR, &val);
+ dev_dbg(dd->dev, "MR (0x%02x): 0x%08x\n", MCHP_PDMC_MR, val);
+ regmap_read(dd->regmap, MCHP_PDMC_CFGR, &val);
+ dev_dbg(dd->dev, "CFGR (0x%02x): 0x%08x\n", MCHP_PDMC_CFGR, val);
+ regmap_read(dd->regmap, MCHP_PDMC_IMR, &val);
+ dev_dbg(dd->dev, "IMR (0x%02x): 0x%08x\n", MCHP_PDMC_IMR, val);
+#endif
+
+ return 0;
+}
+
+static const struct snd_soc_dai_ops mchp_pdmc_dai_ops = {
+ .set_fmt = mchp_pdmc_set_fmt,
+ .startup = mchp_pdmc_startup,
+ .shutdown = mchp_pdmc_shutdown,
+ .hw_params = mchp_pdmc_hw_params,
+ .hw_free = mchp_pdmc_hw_free,
+ .trigger = mchp_pdmc_trigger,
+};
+
+static int mchp_pdmc_add_chmap_ctls(struct snd_pcm *pcm, struct mchp_pdmc *dd)
+{
+ struct mchp_pdmc_chmap *info;
+ struct snd_kcontrol_new knew = {
+ .iface = SNDRV_CTL_ELEM_IFACE_PCM,
+ .access = SNDRV_CTL_ELEM_ACCESS_READWRITE |
+ SNDRV_CTL_ELEM_ACCESS_TLV_READ |
+ SNDRV_CTL_ELEM_ACCESS_TLV_CALLBACK,
+ .info = mchp_pdmc_chmap_ctl_info,
+ .get = mchp_pdmc_chmap_ctl_get,
+ .put = mchp_pdmc_chmap_ctl_put,
+ .tlv.c = mchp_pdmc_chmap_ctl_tlv,
+ };
+ int err;
+
+ if (WARN_ON(pcm->streams[SNDRV_PCM_STREAM_CAPTURE].chmap_kctl))
+ return -EBUSY;
+ info = kzalloc(sizeof(*info), GFP_KERNEL);
+ if (!info)
+ return -ENOMEM;
+ info->pcm = pcm;
+ info->dd = dd;
+ info->chmap = mchp_pdmc_std_chmaps;
+ knew.name = "Capture Channel Map";
+ knew.device = pcm->device;
+ knew.count = pcm->streams[SNDRV_PCM_STREAM_CAPTURE].substream_count;
+ info->kctl = snd_ctl_new1(&knew, info);
+ if (!info->kctl) {
+ kfree(info);
+ return -ENOMEM;
+ }
+ info->kctl->private_free = mchp_pdmc_chmap_ctl_private_free;
+ err = snd_ctl_add(pcm->card, info->kctl);
+ if (err < 0)
+ return err;
+ pcm->streams[SNDRV_PCM_STREAM_CAPTURE].chmap_kctl = info->kctl;
+ return 0;
+}
+
+static int mchp_pdmc_pcm_new(struct snd_soc_pcm_runtime *rtd,
+ struct snd_soc_dai *dai)
+{
+ struct mchp_pdmc *dd = snd_soc_dai_get_drvdata(dai);
+ int ret;
+
+ ret = mchp_pdmc_add_chmap_ctls(rtd->pcm, dd);
+ if (ret < 0) {
+ dev_err(dd->dev, "failed to add channel map controls: %d\n", ret);
+ return ret;
+ }
+
+ return 0;
+}
+
+static struct snd_soc_dai_driver mchp_pdmc_dai = {
+ .probe = mchp_pdmc_dai_probe,
+ .capture = {
+ .stream_name = "Capture",
+ .channels_min = 1,
+ .channels_max = 4,
+ .rate_min = 8000,
+ .rate_max = 192000,
+ .rates = SNDRV_PCM_RATE_KNOT,
+ .formats = SNDRV_PCM_FMTBIT_S24_LE,
+ },
+ .ops = &mchp_pdmc_dai_ops,
+ .pcm_new = &mchp_pdmc_pcm_new,
+};
+
+/* PDMC interrupt handler */
+static irqreturn_t mchp_pdmc_interrupt(int irq, void *dev_id)
+{
+ struct mchp_pdmc *dd = (struct mchp_pdmc *)dev_id;
+ u32 isr, msr, pending;
+ irqreturn_t ret = IRQ_NONE;
+
+ regmap_read(dd->regmap, MCHP_PDMC_ISR, &isr);
+ regmap_read(dd->regmap, MCHP_PDMC_IMR, &msr);
+
+ pending = isr & msr;
+ dev_dbg(dd->dev, "ISR (0x%02x): 0x%08x, IMR (0x%02x): 0x%08x, pending: 0x%08x\n",
+ MCHP_PDMC_ISR, isr, MCHP_PDMC_IMR, msr, pending);
+ if (!pending)
+ return IRQ_NONE;
+
+ if (pending & MCHP_PDMC_IR_RXUDR) {
+ dev_warn(dd->dev, "underrun detected\n");
+ regmap_write(dd->regmap, MCHP_PDMC_IDR, MCHP_PDMC_IR_RXUDR);
+ ret = IRQ_HANDLED;
+ }
+ if (pending & MCHP_PDMC_IR_RXOVR) {
+ dev_warn(dd->dev, "overrun detected\n");
+ regmap_write(dd->regmap, MCHP_PDMC_IDR, MCHP_PDMC_IR_RXOVR);
+ ret = IRQ_HANDLED;
+ }
+
+ return ret;
+}
+
+/* regmap configuration */
+static bool mchp_pdmc_readable_reg(struct device *dev, unsigned int reg)
+{
+ switch (reg) {
+ case MCHP_PDMC_MR:
+ case MCHP_PDMC_CFGR:
+ case MCHP_PDMC_IMR:
+ case MCHP_PDMC_ISR:
+ case MCHP_PDMC_VER:
+ return true;
+ default:
+ return false;
+ }
+}
+
+static bool mchp_pdmc_writeable_reg(struct device *dev, unsigned int reg)
+{
+ switch (reg) {
+ case MCHP_PDMC_CR:
+ case MCHP_PDMC_MR:
+ case MCHP_PDMC_CFGR:
+ case MCHP_PDMC_IER:
+ case MCHP_PDMC_IDR:
+ return true;
+ default:
+ return false;
+ }
+}
+
+static bool mchp_pdmc_precious_reg(struct device *dev, unsigned int reg)
+{
+ switch (reg) {
+ case MCHP_PDMC_RHR:
+ case MCHP_PDMC_ISR:
+ return true;
+ default:
+ return false;
+ }
+}
+
+static const struct regmap_config mchp_pdmc_regmap_config = {
+ .reg_bits = 32,
+ .reg_stride = 4,
+ .val_bits = 32,
+ .max_register = MCHP_PDMC_VER,
+ .readable_reg = mchp_pdmc_readable_reg,
+ .writeable_reg = mchp_pdmc_writeable_reg,
+ .precious_reg = mchp_pdmc_precious_reg,
+};
+
+static int mchp_pdmc_dt_init(struct mchp_pdmc *dd)
+{
+ struct device_node *np = dd->dev->of_node;
+ bool mic_ch[MCHP_PDMC_DS_NO][MCHP_PDMC_EDGE_NO] = {0};
+ int i;
+ int ret;
+
+ if (!np) {
+ dev_err(dd->dev, "device node not found\n");
+ return -EINVAL;
+ }
+
+ dd->mic_no = of_property_count_u32_elems(np, "microchip,mic-pos");
+ if (dd->mic_no < 0) {
+ dev_err(dd->dev, "failed to get microchip,mic-pos: %d",
+ dd->mic_no);
+ return dd->mic_no;
+ }
+ if (!dd->mic_no || dd->mic_no % 2 ||
+ dd->mic_no / 2 > MCHP_PDMC_MAX_CHANNELS) {
+ dev_err(dd->dev, "invalid array length for microchip,mic-pos: %d",
+ dd->mic_no);
+ return -EINVAL;
+ }
+
+ dd->mic_no /= 2;
+
+ dev_info(dd->dev, "%d PDM microphones declared\n", dd->mic_no);
+
+ /*
+ * by default, we consider the order of microphones in
+ * microchip,mic-pos to be the same with the channel mapping;
+ * 1st microphone channel 0, 2nd microphone channel 1, etc.
+ */
+ for (i = 0; i < dd->mic_no; i++) {
+ int ds;
+ int edge;
+
+ ret = of_property_read_u32_index(np, "microchip,mic-pos", i * 2,
+ &ds);
+ if (ret) {
+ dev_err(dd->dev,
+ "failed to get value no %d value from microchip,mic-pos: %d",
+ i * 2, ret);
+ return ret;
+ }
+ if (ds >= MCHP_PDMC_DS_NO) {
+ dev_err(dd->dev,
+ "invalid DS index in microchip,mic-pos array: %d",
+ ds);
+ return -EINVAL;
+ }
+
+ ret = of_property_read_u32_index(np, "microchip,mic-pos", i * 2 + 1,
+ &edge);
+ if (ret) {
+ dev_err(dd->dev,
+ "failed to get value no %d value from microchip,mic-pos: %d",
+ i * 2 + 1, ret);
+ return ret;
+ }
+
+ if (edge != MCHP_PDMC_CLK_POSITIVE &&
+ edge != MCHP_PDMC_CLK_NEGATIVE) {
+ dev_err(dd->dev,
+ "invalid edge in microchip,mic-pos array: %d", edge);
+ return -EINVAL;
+ }
+ if (mic_ch[ds][edge]) {
+ dev_err(dd->dev,
+ "duplicated mic (DS %d, edge %d) in microchip,mic-pos array",
+ ds, edge);
+ return -EINVAL;
+ }
+ mic_ch[ds][edge] = true;
+ dd->channel_mic_map[i].ds_pos = ds;
+ dd->channel_mic_map[i].clk_edge = edge;
+ }
+
+ return 0;
+}
+
+/* used to clean the channel index found on RHR's MSB */
+static int mchp_pdmc_process(struct snd_pcm_substream *substream,
+ int channel, unsigned long hwoff,
+ void *buf, unsigned long bytes)
+{
+ struct snd_pcm_runtime *runtime = substream->runtime;
+ u8 *dma_ptr = runtime->dma_area + hwoff +
+ channel * (runtime->dma_bytes / runtime->channels);
+ u8 *dma_ptr_end = dma_ptr + bytes;
+ unsigned int sample_size = samples_to_bytes(runtime, 1);
+
+ for (; dma_ptr < dma_ptr_end; dma_ptr += sample_size)
+ *dma_ptr = 0;
+
+ return 0;
+}
+
+static struct snd_dmaengine_pcm_config mchp_pdmc_config = {
+ .process = mchp_pdmc_process,
+ .prepare_slave_config = snd_dmaengine_pcm_prepare_slave_config,
+};
+
+static int mchp_pdmc_probe(struct platform_device *pdev)
+{
+ struct device *dev = &pdev->dev;
+ struct mchp_pdmc *dd;
+ struct resource *res;
+ void __iomem *io_base;
+ u32 version;
+ int irq;
+ int ret;
+
+ dd = devm_kzalloc(dev, sizeof(*dd), GFP_KERNEL);
+ if (!dd)
+ return -ENOMEM;
+
+ dd->dev = &pdev->dev;
+ ret = mchp_pdmc_dt_init(dd);
+ if (ret < 0)
+ return ret;
+
+ irq = platform_get_irq(pdev, 0);
+ if (irq < 0)
+ return irq;
+
+ 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->gclk)) {
+ ret = PTR_ERR(dd->gclk);
+ dev_err(dev, "failed to get GCK: %d\n", ret);
+ return ret;
+ }
+
+ io_base = devm_platform_get_and_ioremap_resource(pdev, 0, &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->regmap = devm_regmap_init_mmio(dev, io_base,
+ &mchp_pdmc_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_request_irq(dev, irq, mchp_pdmc_interrupt, 0,
+ dev_name(&pdev->dev), (void *)dd);
+ if (ret < 0) {
+ dev_err(dev, "can't register ISR for IRQ %u (ret=%i)\n",
+ irq, ret);
+ return ret;
+ }
+
+ /* by default audio filter is enabled and the SINC Filter order
+ * will be set to the recommended value, 3
+ */
+ dd->audio_filter_en = true;
+ dd->sinc_order = 3;
+
+ dd->addr.addr = (dma_addr_t)res->start + MCHP_PDMC_RHR;
+ platform_set_drvdata(pdev, dd);
+
+ /* register platform */
+ ret = devm_snd_dmaengine_pcm_register(dev, &mchp_pdmc_config, 0);
+ if (ret) {
+ dev_err(dev, "could not register platform: %d\n", ret);
+ return ret;
+ }
+
+ ret = devm_snd_soc_register_component(dev, &mchp_pdmc_dai_component,
+ &mchp_pdmc_dai, 1);
+ if (ret) {
+ dev_err(dev, "could not register CPU DAI: %d\n", ret);
+ return ret;
+ }
+
+ /* print IP version */
+ regmap_read(dd->regmap, MCHP_PDMC_VER, &version);
+ dev_info(dd->dev, "hw version: %#lx\n",
+ version & MCHP_PDMC_VER_VERSION);
+
+ return 0;
+}
+
+static const struct of_device_id mchp_pdmc_of_match[] = {
+ {
+ .compatible = "microchip,sama7g5-pdmc",
+ }, {
+ /* sentinel */
+ }
+};
+MODULE_DEVICE_TABLE(of, mchp_pdmc_of_match);
+
+static struct platform_driver mchp_pdmc_driver = {
+ .driver = {
+ .name = "mchp-pdmc",
+ .of_match_table = of_match_ptr(mchp_pdmc_of_match),
+ .pm = &snd_soc_pm_ops,
+ },
+ .probe = mchp_pdmc_probe,
+};
+module_platform_driver(mchp_pdmc_driver);
+
+MODULE_DESCRIPTION("Microchip PDMC driver under ALSA SoC architecture");
+MODULE_AUTHOR("Codrin Ciubotariu <codrin.ciubotariu@microchip.com>");
+MODULE_LICENSE("GPL v2");
diff --git a/sound/soc/atmel/mchp-spdifrx.c b/sound/soc/atmel/mchp-spdifrx.c
new file mode 100644
index 000000000..76ce37f64
--- /dev/null
+++ b/sound/soc/atmel/mchp-spdifrx.c
@@ -0,0 +1,1061 @@
+// SPDX-License-Identifier: GPL-2.0
+//
+// Driver for Microchip S/PDIF RX Controller
+//
+// Copyright (C) 2020 Microchip Technology Inc. and its subsidiaries
+//
+// Author: Codrin Ciubotariu <codrin.ciubotariu@microchip.com>
+
+#include <linux/clk.h>
+#include <linux/io.h>
+#include <linux/module.h>
+#include <linux/regmap.h>
+#include <linux/spinlock.h>
+
+#include <sound/dmaengine_pcm.h>
+#include <sound/pcm_params.h>
+#include <sound/soc.h>
+
+/*
+ * ---- S/PDIF Receiver Controller Register map ----
+ */
+#define SPDIFRX_CR 0x00 /* Control Register */
+#define SPDIFRX_MR 0x04 /* Mode Register */
+
+#define SPDIFRX_IER 0x10 /* Interrupt Enable Register */
+#define SPDIFRX_IDR 0x14 /* Interrupt Disable Register */
+#define SPDIFRX_IMR 0x18 /* Interrupt Mask Register */
+#define SPDIFRX_ISR 0x1c /* Interrupt Status Register */
+#define SPDIFRX_RSR 0x20 /* Status Register */
+#define SPDIFRX_RHR 0x24 /* Holding Register */
+
+#define SPDIFRX_CHSR(channel, reg) \
+ (0x30 + (channel) * 0x30 + (reg) * 4) /* Channel x Status Registers */
+
+#define SPDIFRX_CHUD(channel, reg) \
+ (0x48 + (channel) * 0x30 + (reg) * 4) /* Channel x User Data Registers */
+
+#define SPDIFRX_WPMR 0xE4 /* Write Protection Mode Register */
+#define SPDIFRX_WPSR 0xE8 /* Write Protection Status Register */
+
+#define SPDIFRX_VERSION 0xFC /* Version Register */
+
+/*
+ * ---- Control Register (Write-only) ----
+ */
+#define SPDIFRX_CR_SWRST BIT(0) /* Software Reset */
+
+/*
+ * ---- Mode Register (Read/Write) ----
+ */
+/* Receive Enable */
+#define SPDIFRX_MR_RXEN_MASK GENMASK(0, 0)
+#define SPDIFRX_MR_RXEN_DISABLE (0 << 0) /* SPDIF Receiver Disabled */
+#define SPDIFRX_MR_RXEN_ENABLE (1 << 0) /* SPDIF Receiver Enabled */
+
+/* Validity Bit Mode */
+#define SPDIFRX_MR_VBMODE_MASK GENAMSK(1, 1)
+#define SPDIFRX_MR_VBMODE_ALWAYS_LOAD \
+ (0 << 1) /* Load sample regardless of validity bit value */
+#define SPDIFRX_MR_VBMODE_DISCARD_IF_VB1 \
+ (1 << 1) /* Load sample only if validity bit is 0 */
+
+/* Data Word Endian Mode */
+#define SPDIFRX_MR_ENDIAN_MASK GENMASK(2, 2)
+#define SPDIFRX_MR_ENDIAN_LITTLE (0 << 2) /* Little Endian Mode */
+#define SPDIFRX_MR_ENDIAN_BIG (1 << 2) /* Big Endian Mode */
+
+/* Parity Bit Mode */
+#define SPDIFRX_MR_PBMODE_MASK GENMASK(3, 3)
+#define SPDIFRX_MR_PBMODE_PARCHECK (0 << 3) /* Parity Check Enabled */
+#define SPDIFRX_MR_PBMODE_NOPARCHECK (1 << 3) /* Parity Check Disabled */
+
+/* Sample Data Width */
+#define SPDIFRX_MR_DATAWIDTH_MASK GENMASK(5, 4)
+#define SPDIFRX_MR_DATAWIDTH(width) \
+ (((6 - (width) / 4) << 4) & SPDIFRX_MR_DATAWIDTH_MASK)
+
+/* Packed Data Mode in Receive Holding Register */
+#define SPDIFRX_MR_PACK_MASK GENMASK(7, 7)
+#define SPDIFRX_MR_PACK_DISABLED (0 << 7)
+#define SPDIFRX_MR_PACK_ENABLED (1 << 7)
+
+/* Start of Block Bit Mode */
+#define SPDIFRX_MR_SBMODE_MASK GENMASK(8, 8)
+#define SPDIFRX_MR_SBMODE_ALWAYS_LOAD (0 << 8)
+#define SPDIFRX_MR_SBMODE_DISCARD (1 << 8)
+
+/* Consecutive Preamble Error Threshold Automatic Restart */
+#define SPDIFRX_MR_AUTORST_MASK GENMASK(24, 24)
+#define SPDIFRX_MR_AUTORST_NOACTION (0 << 24)
+#define SPDIFRX_MR_AUTORST_UNLOCK_ON_PRE_ERR (1 << 24)
+
+/*
+ * ---- Interrupt Enable/Disable/Mask/Status Register (Write/Read-only) ----
+ */
+#define SPDIFRX_IR_RXRDY BIT(0)
+#define SPDIFRX_IR_LOCKED BIT(1)
+#define SPDIFRX_IR_LOSS BIT(2)
+#define SPDIFRX_IR_BLOCKEND BIT(3)
+#define SPDIFRX_IR_SFE BIT(4)
+#define SPDIFRX_IR_PAR_ERR BIT(5)
+#define SPDIFRX_IR_OVERRUN BIT(6)
+#define SPDIFRX_IR_RXFULL BIT(7)
+#define SPDIFRX_IR_CSC(ch) BIT((ch) + 8)
+#define SPDIFRX_IR_SECE BIT(10)
+#define SPDIFRX_IR_BLOCKST BIT(11)
+#define SPDIFRX_IR_NRZ_ERR BIT(12)
+#define SPDIFRX_IR_PRE_ERR BIT(13)
+#define SPDIFRX_IR_CP_ERR BIT(14)
+
+/*
+ * ---- Receiver Status Register (Read/Write) ----
+ */
+/* Enable Status */
+#define SPDIFRX_RSR_ULOCK BIT(0)
+#define SPDIFRX_RSR_BADF BIT(1)
+#define SPDIFRX_RSR_LOWF BIT(2)
+#define SPDIFRX_RSR_NOSIGNAL BIT(3)
+#define SPDIFRX_RSR_IFS_MASK GENMASK(27, 16)
+#define SPDIFRX_RSR_IFS(reg) \
+ (((reg) & SPDIFRX_RSR_IFS_MASK) >> 16)
+
+/*
+ * ---- Version Register (Read-only) ----
+ */
+#define SPDIFRX_VERSION_MASK GENMASK(11, 0)
+#define SPDIFRX_VERSION_MFN_MASK GENMASK(18, 16)
+#define SPDIFRX_VERSION_MFN(reg) (((reg) & SPDIFRX_VERSION_MFN_MASK) >> 16)
+
+static bool mchp_spdifrx_readable_reg(struct device *dev, unsigned int reg)
+{
+ switch (reg) {
+ case SPDIFRX_MR:
+ case SPDIFRX_IMR:
+ case SPDIFRX_ISR:
+ case SPDIFRX_RSR:
+ case SPDIFRX_CHSR(0, 0):
+ case SPDIFRX_CHSR(0, 1):
+ case SPDIFRX_CHSR(0, 2):
+ case SPDIFRX_CHSR(0, 3):
+ case SPDIFRX_CHSR(0, 4):
+ case SPDIFRX_CHSR(0, 5):
+ case SPDIFRX_CHUD(0, 0):
+ case SPDIFRX_CHUD(0, 1):
+ case SPDIFRX_CHUD(0, 2):
+ case SPDIFRX_CHUD(0, 3):
+ case SPDIFRX_CHUD(0, 4):
+ case SPDIFRX_CHUD(0, 5):
+ case SPDIFRX_CHSR(1, 0):
+ case SPDIFRX_CHSR(1, 1):
+ case SPDIFRX_CHSR(1, 2):
+ case SPDIFRX_CHSR(1, 3):
+ case SPDIFRX_CHSR(1, 4):
+ case SPDIFRX_CHSR(1, 5):
+ case SPDIFRX_CHUD(1, 0):
+ case SPDIFRX_CHUD(1, 1):
+ case SPDIFRX_CHUD(1, 2):
+ case SPDIFRX_CHUD(1, 3):
+ case SPDIFRX_CHUD(1, 4):
+ case SPDIFRX_CHUD(1, 5):
+ case SPDIFRX_WPMR:
+ case SPDIFRX_WPSR:
+ case SPDIFRX_VERSION:
+ return true;
+ default:
+ return false;
+ }
+}
+
+static bool mchp_spdifrx_writeable_reg(struct device *dev, unsigned int reg)
+{
+ switch (reg) {
+ case SPDIFRX_CR:
+ case SPDIFRX_MR:
+ case SPDIFRX_IER:
+ case SPDIFRX_IDR:
+ case SPDIFRX_WPMR:
+ return true;
+ default:
+ return false;
+ }
+}
+
+static bool mchp_spdifrx_precious_reg(struct device *dev, unsigned int reg)
+{
+ switch (reg) {
+ case SPDIFRX_ISR:
+ case SPDIFRX_RHR:
+ return true;
+ default:
+ return false;
+ }
+}
+
+static const struct regmap_config mchp_spdifrx_regmap_config = {
+ .reg_bits = 32,
+ .reg_stride = 4,
+ .val_bits = 32,
+ .max_register = SPDIFRX_VERSION,
+ .readable_reg = mchp_spdifrx_readable_reg,
+ .writeable_reg = mchp_spdifrx_writeable_reg,
+ .precious_reg = mchp_spdifrx_precious_reg,
+};
+
+#define SPDIFRX_GCLK_RATIO_MIN (12 * 64)
+
+#define SPDIFRX_CS_BITS 192
+#define SPDIFRX_UD_BITS 192
+
+#define SPDIFRX_CHANNELS 2
+
+struct mchp_spdifrx_ch_stat {
+ unsigned char data[SPDIFRX_CS_BITS / 8];
+ struct completion done;
+};
+
+struct mchp_spdifrx_user_data {
+ unsigned char data[SPDIFRX_UD_BITS / 8];
+ struct completion done;
+};
+
+struct mchp_spdifrx_mixer_control {
+ struct mchp_spdifrx_ch_stat ch_stat[SPDIFRX_CHANNELS];
+ struct mchp_spdifrx_user_data user_data[SPDIFRX_CHANNELS];
+ bool ulock;
+ bool badf;
+ bool signal;
+};
+
+struct mchp_spdifrx_dev {
+ struct snd_dmaengine_dai_dma_data capture;
+ struct mchp_spdifrx_mixer_control control;
+ struct mutex mlock;
+ struct device *dev;
+ struct regmap *regmap;
+ struct clk *pclk;
+ struct clk *gclk;
+ unsigned int fmt;
+ unsigned int trigger_enabled;
+ unsigned int gclk_enabled:1;
+};
+
+static void mchp_spdifrx_channel_status_read(struct mchp_spdifrx_dev *dev,
+ int channel)
+{
+ struct mchp_spdifrx_mixer_control *ctrl = &dev->control;
+ u8 *ch_stat = &ctrl->ch_stat[channel].data[0];
+ u32 val;
+ int i;
+
+ for (i = 0; i < ARRAY_SIZE(ctrl->ch_stat[channel].data) / 4; i++) {
+ regmap_read(dev->regmap, SPDIFRX_CHSR(channel, i), &val);
+ *ch_stat++ = val & 0xFF;
+ *ch_stat++ = (val >> 8) & 0xFF;
+ *ch_stat++ = (val >> 16) & 0xFF;
+ *ch_stat++ = (val >> 24) & 0xFF;
+ }
+}
+
+static void mchp_spdifrx_channel_user_data_read(struct mchp_spdifrx_dev *dev,
+ int channel)
+{
+ struct mchp_spdifrx_mixer_control *ctrl = &dev->control;
+ u8 *user_data = &ctrl->user_data[channel].data[0];
+ u32 val;
+ int i;
+
+ for (i = 0; i < ARRAY_SIZE(ctrl->user_data[channel].data) / 4; i++) {
+ regmap_read(dev->regmap, SPDIFRX_CHUD(channel, i), &val);
+ *user_data++ = val & 0xFF;
+ *user_data++ = (val >> 8) & 0xFF;
+ *user_data++ = (val >> 16) & 0xFF;
+ *user_data++ = (val >> 24) & 0xFF;
+ }
+}
+
+static irqreturn_t mchp_spdif_interrupt(int irq, void *dev_id)
+{
+ struct mchp_spdifrx_dev *dev = dev_id;
+ struct mchp_spdifrx_mixer_control *ctrl = &dev->control;
+ u32 sr, imr, pending;
+ irqreturn_t ret = IRQ_NONE;
+ int ch;
+
+ regmap_read(dev->regmap, SPDIFRX_ISR, &sr);
+ regmap_read(dev->regmap, SPDIFRX_IMR, &imr);
+ pending = sr & imr;
+ dev_dbg(dev->dev, "ISR: %#x, IMR: %#x, pending: %#x\n", sr, imr,
+ pending);
+
+ if (!pending)
+ return IRQ_NONE;
+
+ if (pending & SPDIFRX_IR_BLOCKEND) {
+ for (ch = 0; ch < SPDIFRX_CHANNELS; ch++) {
+ mchp_spdifrx_channel_user_data_read(dev, ch);
+ complete(&ctrl->user_data[ch].done);
+ }
+ regmap_write(dev->regmap, SPDIFRX_IDR, SPDIFRX_IR_BLOCKEND);
+ ret = IRQ_HANDLED;
+ }
+
+ for (ch = 0; ch < SPDIFRX_CHANNELS; ch++) {
+ if (pending & SPDIFRX_IR_CSC(ch)) {
+ mchp_spdifrx_channel_status_read(dev, ch);
+ complete(&ctrl->ch_stat[ch].done);
+ regmap_write(dev->regmap, SPDIFRX_IDR, SPDIFRX_IR_CSC(ch));
+ ret = IRQ_HANDLED;
+ }
+ }
+
+ if (pending & SPDIFRX_IR_OVERRUN) {
+ dev_warn(dev->dev, "Overrun detected\n");
+ ret = IRQ_HANDLED;
+ }
+
+ return ret;
+}
+
+static int mchp_spdifrx_trigger(struct snd_pcm_substream *substream, int cmd,
+ struct snd_soc_dai *dai)
+{
+ struct mchp_spdifrx_dev *dev = snd_soc_dai_get_drvdata(dai);
+ int ret = 0;
+
+ switch (cmd) {
+ case SNDRV_PCM_TRIGGER_START:
+ case SNDRV_PCM_TRIGGER_RESUME:
+ case SNDRV_PCM_TRIGGER_PAUSE_RELEASE:
+ mutex_lock(&dev->mlock);
+ /* Enable overrun interrupts */
+ regmap_write(dev->regmap, SPDIFRX_IER, SPDIFRX_IR_OVERRUN);
+
+ /* Enable receiver. */
+ regmap_update_bits(dev->regmap, SPDIFRX_MR, SPDIFRX_MR_RXEN_MASK,
+ SPDIFRX_MR_RXEN_ENABLE);
+ dev->trigger_enabled = true;
+ mutex_unlock(&dev->mlock);
+ break;
+ case SNDRV_PCM_TRIGGER_STOP:
+ case SNDRV_PCM_TRIGGER_SUSPEND:
+ case SNDRV_PCM_TRIGGER_PAUSE_PUSH:
+ mutex_lock(&dev->mlock);
+ /* Disable overrun interrupts */
+ regmap_write(dev->regmap, SPDIFRX_IDR, SPDIFRX_IR_OVERRUN);
+
+ /* Disable receiver. */
+ regmap_update_bits(dev->regmap, SPDIFRX_MR, SPDIFRX_MR_RXEN_MASK,
+ SPDIFRX_MR_RXEN_DISABLE);
+ dev->trigger_enabled = false;
+ mutex_unlock(&dev->mlock);
+ break;
+ default:
+ ret = -EINVAL;
+ }
+
+ return ret;
+}
+
+static int mchp_spdifrx_hw_params(struct snd_pcm_substream *substream,
+ struct snd_pcm_hw_params *params,
+ struct snd_soc_dai *dai)
+{
+ struct mchp_spdifrx_dev *dev = snd_soc_dai_get_drvdata(dai);
+ u32 mr = 0;
+ int ret;
+
+ dev_dbg(dev->dev, "%s() rate=%u format=%#x width=%u channels=%u\n",
+ __func__, params_rate(params), params_format(params),
+ params_width(params), params_channels(params));
+
+ if (substream->stream == SNDRV_PCM_STREAM_PLAYBACK) {
+ dev_err(dev->dev, "Playback is not supported\n");
+ return -EINVAL;
+ }
+
+ if (params_channels(params) != SPDIFRX_CHANNELS) {
+ dev_err(dev->dev, "unsupported number of channels: %d\n",
+ params_channels(params));
+ return -EINVAL;
+ }
+
+ switch (params_format(params)) {
+ case SNDRV_PCM_FORMAT_S16_BE:
+ case SNDRV_PCM_FORMAT_S20_3BE:
+ case SNDRV_PCM_FORMAT_S24_3BE:
+ case SNDRV_PCM_FORMAT_S24_BE:
+ mr |= SPDIFRX_MR_ENDIAN_BIG;
+ fallthrough;
+ case SNDRV_PCM_FORMAT_S16_LE:
+ case SNDRV_PCM_FORMAT_S20_3LE:
+ case SNDRV_PCM_FORMAT_S24_3LE:
+ case SNDRV_PCM_FORMAT_S24_LE:
+ mr |= SPDIFRX_MR_DATAWIDTH(params_width(params));
+ break;
+ default:
+ dev_err(dev->dev, "unsupported PCM format: %d\n",
+ params_format(params));
+ return -EINVAL;
+ }
+
+ mutex_lock(&dev->mlock);
+ if (dev->trigger_enabled) {
+ dev_err(dev->dev, "PCM already running\n");
+ ret = -EBUSY;
+ goto unlock;
+ }
+
+ if (dev->gclk_enabled) {
+ clk_disable_unprepare(dev->gclk);
+ dev->gclk_enabled = 0;
+ }
+ ret = clk_set_min_rate(dev->gclk, params_rate(params) *
+ SPDIFRX_GCLK_RATIO_MIN + 1);
+ if (ret) {
+ dev_err(dev->dev,
+ "unable to set gclk min rate: rate %u * ratio %u + 1\n",
+ params_rate(params), SPDIFRX_GCLK_RATIO_MIN);
+ goto unlock;
+ }
+ ret = clk_prepare_enable(dev->gclk);
+ if (ret) {
+ dev_err(dev->dev, "unable to enable gclk: %d\n", ret);
+ goto unlock;
+ }
+ dev->gclk_enabled = 1;
+
+ dev_dbg(dev->dev, "GCLK range min set to %d\n",
+ params_rate(params) * SPDIFRX_GCLK_RATIO_MIN + 1);
+
+ ret = regmap_write(dev->regmap, SPDIFRX_MR, mr);
+
+unlock:
+ mutex_unlock(&dev->mlock);
+
+ return ret;
+}
+
+static int mchp_spdifrx_hw_free(struct snd_pcm_substream *substream,
+ struct snd_soc_dai *dai)
+{
+ struct mchp_spdifrx_dev *dev = snd_soc_dai_get_drvdata(dai);
+
+ mutex_lock(&dev->mlock);
+ if (dev->gclk_enabled) {
+ clk_disable_unprepare(dev->gclk);
+ dev->gclk_enabled = 0;
+ }
+ mutex_unlock(&dev->mlock);
+ return 0;
+}
+
+static const struct snd_soc_dai_ops mchp_spdifrx_dai_ops = {
+ .trigger = mchp_spdifrx_trigger,
+ .hw_params = mchp_spdifrx_hw_params,
+ .hw_free = mchp_spdifrx_hw_free,
+};
+
+#define MCHP_SPDIF_RATES SNDRV_PCM_RATE_8000_192000
+
+#define MCHP_SPDIF_FORMATS (SNDRV_PCM_FMTBIT_S16_LE | \
+ SNDRV_PCM_FMTBIT_U16_BE | \
+ SNDRV_PCM_FMTBIT_S20_3LE | \
+ SNDRV_PCM_FMTBIT_S20_3BE | \
+ SNDRV_PCM_FMTBIT_S24_3LE | \
+ SNDRV_PCM_FMTBIT_S24_3BE | \
+ SNDRV_PCM_FMTBIT_S24_LE | \
+ SNDRV_PCM_FMTBIT_S24_BE \
+ )
+
+static int mchp_spdifrx_info(struct snd_kcontrol *kcontrol,
+ struct snd_ctl_elem_info *uinfo)
+{
+ uinfo->type = SNDRV_CTL_ELEM_TYPE_IEC958;
+ uinfo->count = 1;
+
+ return 0;
+}
+
+static int mchp_spdifrx_cs_get(struct mchp_spdifrx_dev *dev,
+ int channel,
+ struct snd_ctl_elem_value *uvalue)
+{
+ struct mchp_spdifrx_mixer_control *ctrl = &dev->control;
+ struct mchp_spdifrx_ch_stat *ch_stat = &ctrl->ch_stat[channel];
+ int ret = 0;
+
+ mutex_lock(&dev->mlock);
+
+ /*
+ * We may reach this point with both clocks enabled but the receiver
+ * still disabled. To void waiting for completion and return with
+ * timeout check the dev->trigger_enabled.
+ *
+ * To retrieve data:
+ * - if the receiver is enabled CSC IRQ will update the data in software
+ * caches (ch_stat->data)
+ * - otherwise we just update it here the software caches with latest
+ * available information and return it; in this case we don't need
+ * spin locking as the IRQ is disabled and will not be raised from
+ * anywhere else.
+ */
+
+ if (dev->trigger_enabled) {
+ reinit_completion(&ch_stat->done);
+ regmap_write(dev->regmap, SPDIFRX_IER, SPDIFRX_IR_CSC(channel));
+ /* Check for new data available */
+ ret = wait_for_completion_interruptible_timeout(&ch_stat->done,
+ msecs_to_jiffies(100));
+ /* Valid stream might not be present */
+ if (ret <= 0) {
+ dev_dbg(dev->dev, "channel status for channel %d timeout\n",
+ channel);
+ regmap_write(dev->regmap, SPDIFRX_IDR, SPDIFRX_IR_CSC(channel));
+ ret = ret ? : -ETIMEDOUT;
+ goto unlock;
+ } else {
+ ret = 0;
+ }
+ } else {
+ /* Update software cache with latest channel status. */
+ mchp_spdifrx_channel_status_read(dev, channel);
+ }
+
+ memcpy(uvalue->value.iec958.status, ch_stat->data,
+ sizeof(ch_stat->data));
+
+unlock:
+ mutex_unlock(&dev->mlock);
+ return ret;
+}
+
+static int mchp_spdifrx_cs1_get(struct snd_kcontrol *kcontrol,
+ struct snd_ctl_elem_value *uvalue)
+{
+ struct snd_soc_dai *dai = snd_kcontrol_chip(kcontrol);
+ struct mchp_spdifrx_dev *dev = snd_soc_dai_get_drvdata(dai);
+
+ return mchp_spdifrx_cs_get(dev, 0, uvalue);
+}
+
+static int mchp_spdifrx_cs2_get(struct snd_kcontrol *kcontrol,
+ struct snd_ctl_elem_value *uvalue)
+{
+ struct snd_soc_dai *dai = snd_kcontrol_chip(kcontrol);
+ struct mchp_spdifrx_dev *dev = snd_soc_dai_get_drvdata(dai);
+
+ return mchp_spdifrx_cs_get(dev, 1, uvalue);
+}
+
+static int mchp_spdifrx_cs_mask(struct snd_kcontrol *kcontrol,
+ struct snd_ctl_elem_value *uvalue)
+{
+ memset(uvalue->value.iec958.status, 0xff,
+ sizeof(uvalue->value.iec958.status));
+
+ return 0;
+}
+
+static int mchp_spdifrx_subcode_ch_get(struct mchp_spdifrx_dev *dev,
+ int channel,
+ struct snd_ctl_elem_value *uvalue)
+{
+ struct mchp_spdifrx_mixer_control *ctrl = &dev->control;
+ struct mchp_spdifrx_user_data *user_data = &ctrl->user_data[channel];
+ int ret = 0;
+
+ mutex_lock(&dev->mlock);
+
+ /*
+ * We may reach this point with both clocks enabled but the receiver
+ * still disabled. To void waiting for completion to just timeout we
+ * check here the dev->trigger_enabled flag.
+ *
+ * To retrieve data:
+ * - if the receiver is enabled we need to wait for blockend IRQ to read
+ * data to and update it for us in software caches
+ * - otherwise reading the SPDIFRX_CHUD() registers is enough.
+ */
+
+ if (dev->trigger_enabled) {
+ reinit_completion(&user_data->done);
+ regmap_write(dev->regmap, SPDIFRX_IER, SPDIFRX_IR_BLOCKEND);
+ ret = wait_for_completion_interruptible_timeout(&user_data->done,
+ msecs_to_jiffies(100));
+ /* Valid stream might not be present. */
+ if (ret <= 0) {
+ dev_dbg(dev->dev, "user data for channel %d timeout\n",
+ channel);
+ regmap_write(dev->regmap, SPDIFRX_IDR, SPDIFRX_IR_BLOCKEND);
+ ret = ret ? : -ETIMEDOUT;
+ goto unlock;
+ } else {
+ ret = 0;
+ }
+ } else {
+ /* Update software cache with last available data. */
+ mchp_spdifrx_channel_user_data_read(dev, channel);
+ }
+
+ memcpy(uvalue->value.iec958.subcode, user_data->data,
+ sizeof(user_data->data));
+
+unlock:
+ mutex_unlock(&dev->mlock);
+ return ret;
+}
+
+static int mchp_spdifrx_subcode_ch1_get(struct snd_kcontrol *kcontrol,
+ struct snd_ctl_elem_value *uvalue)
+{
+ struct snd_soc_dai *dai = snd_kcontrol_chip(kcontrol);
+ struct mchp_spdifrx_dev *dev = snd_soc_dai_get_drvdata(dai);
+
+ return mchp_spdifrx_subcode_ch_get(dev, 0, uvalue);
+}
+
+static int mchp_spdifrx_subcode_ch2_get(struct snd_kcontrol *kcontrol,
+ struct snd_ctl_elem_value *uvalue)
+{
+ struct snd_soc_dai *dai = snd_kcontrol_chip(kcontrol);
+ struct mchp_spdifrx_dev *dev = snd_soc_dai_get_drvdata(dai);
+
+ return mchp_spdifrx_subcode_ch_get(dev, 1, uvalue);
+}
+
+static int mchp_spdifrx_boolean_info(struct snd_kcontrol *kcontrol,
+ struct snd_ctl_elem_info *uinfo)
+{
+ uinfo->type = SNDRV_CTL_ELEM_TYPE_BOOLEAN;
+ uinfo->count = 1;
+ uinfo->value.integer.min = 0;
+ uinfo->value.integer.max = 1;
+
+ return 0;
+}
+
+static int mchp_spdifrx_ulock_get(struct snd_kcontrol *kcontrol,
+ struct snd_ctl_elem_value *uvalue)
+{
+ struct snd_soc_dai *dai = snd_kcontrol_chip(kcontrol);
+ struct mchp_spdifrx_dev *dev = snd_soc_dai_get_drvdata(dai);
+ struct mchp_spdifrx_mixer_control *ctrl = &dev->control;
+ u32 val;
+ bool ulock_old = ctrl->ulock;
+
+ mutex_lock(&dev->mlock);
+
+ /*
+ * The RSR.ULOCK has wrong value if both pclk and gclk are enabled
+ * and the receiver is disabled. Thus we take into account the
+ * dev->trigger_enabled here to return a real status.
+ */
+ if (dev->trigger_enabled) {
+ regmap_read(dev->regmap, SPDIFRX_RSR, &val);
+ ctrl->ulock = !(val & SPDIFRX_RSR_ULOCK);
+ } else {
+ ctrl->ulock = 0;
+ }
+
+ uvalue->value.integer.value[0] = ctrl->ulock;
+
+ mutex_unlock(&dev->mlock);
+
+ return ulock_old != ctrl->ulock;
+}
+
+static int mchp_spdifrx_badf_get(struct snd_kcontrol *kcontrol,
+ struct snd_ctl_elem_value *uvalue)
+{
+ struct snd_soc_dai *dai = snd_kcontrol_chip(kcontrol);
+ struct mchp_spdifrx_dev *dev = snd_soc_dai_get_drvdata(dai);
+ struct mchp_spdifrx_mixer_control *ctrl = &dev->control;
+ u32 val;
+ bool badf_old = ctrl->badf;
+
+ mutex_lock(&dev->mlock);
+
+ /*
+ * The RSR.ULOCK has wrong value if both pclk and gclk are enabled
+ * and the receiver is disabled. Thus we take into account the
+ * dev->trigger_enabled here to return a real status.
+ */
+ if (dev->trigger_enabled) {
+ regmap_read(dev->regmap, SPDIFRX_RSR, &val);
+ ctrl->badf = !!(val & SPDIFRX_RSR_BADF);
+ } else {
+ ctrl->badf = 0;
+ }
+
+ mutex_unlock(&dev->mlock);
+
+ uvalue->value.integer.value[0] = ctrl->badf;
+
+ return badf_old != ctrl->badf;
+}
+
+static int mchp_spdifrx_signal_get(struct snd_kcontrol *kcontrol,
+ struct snd_ctl_elem_value *uvalue)
+{
+ struct snd_soc_dai *dai = snd_kcontrol_chip(kcontrol);
+ struct mchp_spdifrx_dev *dev = snd_soc_dai_get_drvdata(dai);
+ struct mchp_spdifrx_mixer_control *ctrl = &dev->control;
+ u32 val = ~0U, loops = 10;
+ int ret;
+ bool signal_old = ctrl->signal;
+
+ mutex_lock(&dev->mlock);
+
+ /*
+ * To get the signal we need to have receiver enabled. This
+ * could be enabled also from trigger() function thus we need to
+ * take care of not disabling the receiver when it runs.
+ */
+ if (!dev->trigger_enabled) {
+ ret = clk_prepare_enable(dev->gclk);
+ if (ret)
+ goto unlock;
+
+ regmap_update_bits(dev->regmap, SPDIFRX_MR, SPDIFRX_MR_RXEN_MASK,
+ SPDIFRX_MR_RXEN_ENABLE);
+
+ /* Wait for RSR.ULOCK bit. */
+ while (--loops) {
+ regmap_read(dev->regmap, SPDIFRX_RSR, &val);
+ if (!(val & SPDIFRX_RSR_ULOCK))
+ break;
+ usleep_range(100, 150);
+ }
+
+ regmap_update_bits(dev->regmap, SPDIFRX_MR, SPDIFRX_MR_RXEN_MASK,
+ SPDIFRX_MR_RXEN_DISABLE);
+
+ clk_disable_unprepare(dev->gclk);
+ } else {
+ regmap_read(dev->regmap, SPDIFRX_RSR, &val);
+ }
+
+unlock:
+ mutex_unlock(&dev->mlock);
+
+ if (!(val & SPDIFRX_RSR_ULOCK))
+ ctrl->signal = !(val & SPDIFRX_RSR_NOSIGNAL);
+ else
+ ctrl->signal = 0;
+ uvalue->value.integer.value[0] = ctrl->signal;
+
+ return signal_old != ctrl->signal;
+}
+
+static int mchp_spdifrx_rate_info(struct snd_kcontrol *kcontrol,
+ struct snd_ctl_elem_info *uinfo)
+{
+ uinfo->type = SNDRV_CTL_ELEM_TYPE_INTEGER;
+ uinfo->count = 1;
+ uinfo->value.integer.min = 0;
+ uinfo->value.integer.max = 192000;
+
+ return 0;
+}
+
+static int mchp_spdifrx_rate_get(struct snd_kcontrol *kcontrol,
+ struct snd_ctl_elem_value *ucontrol)
+{
+ struct snd_soc_dai *dai = snd_kcontrol_chip(kcontrol);
+ struct mchp_spdifrx_dev *dev = snd_soc_dai_get_drvdata(dai);
+ u32 val;
+ int rate;
+
+ mutex_lock(&dev->mlock);
+
+ /*
+ * The RSR.ULOCK has wrong value if both pclk and gclk are enabled
+ * and the receiver is disabled. Thus we take into account the
+ * dev->trigger_enabled here to return a real status.
+ */
+ if (dev->trigger_enabled) {
+ regmap_read(dev->regmap, SPDIFRX_RSR, &val);
+ /* If the receiver is not locked, ISF data is invalid. */
+ if (val & SPDIFRX_RSR_ULOCK || !(val & SPDIFRX_RSR_IFS_MASK)) {
+ ucontrol->value.integer.value[0] = 0;
+ goto unlock;
+ }
+ } else {
+ /* Reveicer is not locked, IFS data is invalid. */
+ ucontrol->value.integer.value[0] = 0;
+ goto unlock;
+ }
+
+ rate = clk_get_rate(dev->gclk);
+
+ ucontrol->value.integer.value[0] = rate / (32 * SPDIFRX_RSR_IFS(val));
+
+unlock:
+ mutex_unlock(&dev->mlock);
+ return 0;
+}
+
+static struct snd_kcontrol_new mchp_spdifrx_ctrls[] = {
+ /* Channel status controller */
+ {
+ .iface = SNDRV_CTL_ELEM_IFACE_PCM,
+ .name = SNDRV_CTL_NAME_IEC958("", CAPTURE, DEFAULT)
+ " Channel 1",
+ .access = SNDRV_CTL_ELEM_ACCESS_READ |
+ SNDRV_CTL_ELEM_ACCESS_VOLATILE,
+ .info = mchp_spdifrx_info,
+ .get = mchp_spdifrx_cs1_get,
+ },
+ {
+ .iface = SNDRV_CTL_ELEM_IFACE_PCM,
+ .name = SNDRV_CTL_NAME_IEC958("", CAPTURE, DEFAULT)
+ " Channel 2",
+ .access = SNDRV_CTL_ELEM_ACCESS_READ |
+ SNDRV_CTL_ELEM_ACCESS_VOLATILE,
+ .info = mchp_spdifrx_info,
+ .get = mchp_spdifrx_cs2_get,
+ },
+ {
+ .iface = SNDRV_CTL_ELEM_IFACE_PCM,
+ .name = SNDRV_CTL_NAME_IEC958("", CAPTURE, MASK),
+ .access = SNDRV_CTL_ELEM_ACCESS_READ,
+ .info = mchp_spdifrx_info,
+ .get = mchp_spdifrx_cs_mask,
+ },
+ /* User bits controller */
+ {
+ .iface = SNDRV_CTL_ELEM_IFACE_PCM,
+ .name = "IEC958 Subcode Capture Default Channel 1",
+ .access = SNDRV_CTL_ELEM_ACCESS_READ |
+ SNDRV_CTL_ELEM_ACCESS_VOLATILE,
+ .info = mchp_spdifrx_info,
+ .get = mchp_spdifrx_subcode_ch1_get,
+ },
+ {
+ .iface = SNDRV_CTL_ELEM_IFACE_PCM,
+ .name = "IEC958 Subcode Capture Default Channel 2",
+ .access = SNDRV_CTL_ELEM_ACCESS_READ |
+ SNDRV_CTL_ELEM_ACCESS_VOLATILE,
+ .info = mchp_spdifrx_info,
+ .get = mchp_spdifrx_subcode_ch2_get,
+ },
+ /* Lock status */
+ {
+ .iface = SNDRV_CTL_ELEM_IFACE_PCM,
+ .name = SNDRV_CTL_NAME_IEC958("", CAPTURE, NONE) "Unlocked",
+ .access = SNDRV_CTL_ELEM_ACCESS_READ |
+ SNDRV_CTL_ELEM_ACCESS_VOLATILE,
+ .info = mchp_spdifrx_boolean_info,
+ .get = mchp_spdifrx_ulock_get,
+ },
+ /* Bad format */
+ {
+ .iface = SNDRV_CTL_ELEM_IFACE_PCM,
+ .name = SNDRV_CTL_NAME_IEC958("", CAPTURE, NONE)"Bad Format",
+ .access = SNDRV_CTL_ELEM_ACCESS_READ |
+ SNDRV_CTL_ELEM_ACCESS_VOLATILE,
+ .info = mchp_spdifrx_boolean_info,
+ .get = mchp_spdifrx_badf_get,
+ },
+ /* Signal */
+ {
+ .iface = SNDRV_CTL_ELEM_IFACE_PCM,
+ .name = SNDRV_CTL_NAME_IEC958("", CAPTURE, NONE) "Signal",
+ .access = SNDRV_CTL_ELEM_ACCESS_READ |
+ SNDRV_CTL_ELEM_ACCESS_VOLATILE,
+ .info = mchp_spdifrx_boolean_info,
+ .get = mchp_spdifrx_signal_get,
+ },
+ /* Sampling rate */
+ {
+ .iface = SNDRV_CTL_ELEM_IFACE_PCM,
+ .name = SNDRV_CTL_NAME_IEC958("", CAPTURE, NONE) "Rate",
+ .access = SNDRV_CTL_ELEM_ACCESS_READ |
+ SNDRV_CTL_ELEM_ACCESS_VOLATILE,
+ .info = mchp_spdifrx_rate_info,
+ .get = mchp_spdifrx_rate_get,
+ },
+};
+
+static int mchp_spdifrx_dai_probe(struct snd_soc_dai *dai)
+{
+ struct mchp_spdifrx_dev *dev = snd_soc_dai_get_drvdata(dai);
+ struct mchp_spdifrx_mixer_control *ctrl = &dev->control;
+ int ch;
+ int err;
+
+ err = clk_prepare_enable(dev->pclk);
+ if (err) {
+ dev_err(dev->dev,
+ "failed to enable the peripheral clock: %d\n", err);
+ return err;
+ }
+
+ snd_soc_dai_init_dma_data(dai, NULL, &dev->capture);
+
+ /* Software reset the IP */
+ regmap_write(dev->regmap, SPDIFRX_CR, SPDIFRX_CR_SWRST);
+
+ /* Default configuration */
+ regmap_write(dev->regmap, SPDIFRX_MR,
+ SPDIFRX_MR_VBMODE_DISCARD_IF_VB1 |
+ SPDIFRX_MR_SBMODE_DISCARD |
+ SPDIFRX_MR_AUTORST_NOACTION |
+ SPDIFRX_MR_PACK_DISABLED);
+
+ for (ch = 0; ch < SPDIFRX_CHANNELS; ch++) {
+ init_completion(&ctrl->ch_stat[ch].done);
+ init_completion(&ctrl->user_data[ch].done);
+ }
+
+ /* Add controls */
+ snd_soc_add_dai_controls(dai, mchp_spdifrx_ctrls,
+ ARRAY_SIZE(mchp_spdifrx_ctrls));
+
+ return 0;
+}
+
+static int mchp_spdifrx_dai_remove(struct snd_soc_dai *dai)
+{
+ struct mchp_spdifrx_dev *dev = snd_soc_dai_get_drvdata(dai);
+
+ /* Disable interrupts */
+ regmap_write(dev->regmap, SPDIFRX_IDR, GENMASK(14, 0));
+
+ clk_disable_unprepare(dev->pclk);
+
+ return 0;
+}
+
+static struct snd_soc_dai_driver mchp_spdifrx_dai = {
+ .name = "mchp-spdifrx",
+ .probe = mchp_spdifrx_dai_probe,
+ .remove = mchp_spdifrx_dai_remove,
+ .capture = {
+ .stream_name = "S/PDIF Capture",
+ .channels_min = SPDIFRX_CHANNELS,
+ .channels_max = SPDIFRX_CHANNELS,
+ .rates = MCHP_SPDIF_RATES,
+ .formats = MCHP_SPDIF_FORMATS,
+ },
+ .ops = &mchp_spdifrx_dai_ops,
+};
+
+static const struct snd_soc_component_driver mchp_spdifrx_component = {
+ .name = "mchp-spdifrx",
+ .legacy_dai_naming = 1,
+};
+
+static const struct of_device_id mchp_spdifrx_dt_ids[] = {
+ {
+ .compatible = "microchip,sama7g5-spdifrx",
+ },
+ { /* sentinel */ }
+};
+MODULE_DEVICE_TABLE(of, mchp_spdifrx_dt_ids);
+
+static int mchp_spdifrx_probe(struct platform_device *pdev)
+{
+ struct mchp_spdifrx_dev *dev;
+ struct resource *mem;
+ struct regmap *regmap;
+ void __iomem *base;
+ int irq;
+ int err;
+ u32 vers;
+
+ /* Get memory for driver data. */
+ dev = devm_kzalloc(&pdev->dev, sizeof(*dev), GFP_KERNEL);
+ if (!dev)
+ return -ENOMEM;
+
+ /* Map I/O registers. */
+ base = devm_platform_get_and_ioremap_resource(pdev, 0, &mem);
+ if (IS_ERR(base))
+ return PTR_ERR(base);
+
+ regmap = devm_regmap_init_mmio(&pdev->dev, base,
+ &mchp_spdifrx_regmap_config);
+ if (IS_ERR(regmap))
+ return PTR_ERR(regmap);
+
+ /* Request IRQ. */
+ irq = platform_get_irq(pdev, 0);
+ if (irq < 0)
+ return irq;
+
+ err = devm_request_irq(&pdev->dev, irq, mchp_spdif_interrupt, 0,
+ dev_name(&pdev->dev), dev);
+ if (err)
+ return err;
+
+ /* Get the peripheral clock */
+ dev->pclk = devm_clk_get(&pdev->dev, "pclk");
+ if (IS_ERR(dev->pclk)) {
+ err = PTR_ERR(dev->pclk);
+ dev_err(&pdev->dev, "failed to get the peripheral clock: %d\n",
+ err);
+ return err;
+ }
+
+ /* Get the generated clock */
+ dev->gclk = devm_clk_get(&pdev->dev, "gclk");
+ if (IS_ERR(dev->gclk)) {
+ err = PTR_ERR(dev->gclk);
+ dev_err(&pdev->dev,
+ "failed to get the PMC generated clock: %d\n", err);
+ return err;
+ }
+
+ /*
+ * Signal control need a valid rate on gclk. hw_params() configures
+ * it propertly but requesting signal before any hw_params() has been
+ * called lead to invalid value returned for signal. Thus, configure
+ * gclk at a valid rate, here, in initialization, to simplify the
+ * control path.
+ */
+ clk_set_min_rate(dev->gclk, 48000 * SPDIFRX_GCLK_RATIO_MIN + 1);
+
+ mutex_init(&dev->mlock);
+
+ dev->dev = &pdev->dev;
+ dev->regmap = regmap;
+ platform_set_drvdata(pdev, dev);
+
+ dev->capture.addr = (dma_addr_t)mem->start + SPDIFRX_RHR;
+ dev->capture.maxburst = 1;
+
+ err = devm_snd_dmaengine_pcm_register(&pdev->dev, NULL, 0);
+ if (err) {
+ dev_err(&pdev->dev, "failed to register PCM: %d\n", err);
+ return err;
+ }
+
+ err = devm_snd_soc_register_component(&pdev->dev,
+ &mchp_spdifrx_component,
+ &mchp_spdifrx_dai, 1);
+ if (err) {
+ dev_err(&pdev->dev, "fail to register dai\n");
+ return err;
+ }
+
+ regmap_read(regmap, SPDIFRX_VERSION, &vers);
+ dev_info(&pdev->dev, "hw version: %#lx\n", vers & SPDIFRX_VERSION_MASK);
+
+ return 0;
+}
+
+static struct platform_driver mchp_spdifrx_driver = {
+ .probe = mchp_spdifrx_probe,
+ .driver = {
+ .name = "mchp_spdifrx",
+ .of_match_table = of_match_ptr(mchp_spdifrx_dt_ids),
+ },
+};
+
+module_platform_driver(mchp_spdifrx_driver);
+
+MODULE_AUTHOR("Codrin Ciubotariu <codrin.ciubotariu@microchip.com>");
+MODULE_DESCRIPTION("Microchip S/PDIF RX Controller Driver");
+MODULE_LICENSE("GPL v2");
diff --git a/sound/soc/atmel/mchp-spdiftx.c b/sound/soc/atmel/mchp-spdiftx.c
new file mode 100644
index 000000000..ab2d7a791
--- /dev/null
+++ b/sound/soc/atmel/mchp-spdiftx.c
@@ -0,0 +1,859 @@
+// SPDX-License-Identifier: GPL-2.0
+//
+// Driver for Microchip S/PDIF TX Controller
+//
+// Copyright (C) 2020 Microchip Technology Inc. and its subsidiaries
+//
+// Author: Codrin Ciubotariu <codrin.ciubotariu@microchip.com>
+
+#include <linux/clk.h>
+#include <linux/io.h>
+#include <linux/module.h>
+#include <linux/spinlock.h>
+
+#include <sound/asoundef.h>
+#include <sound/dmaengine_pcm.h>
+#include <sound/pcm_params.h>
+#include <sound/soc.h>
+
+/*
+ * ---- S/PDIF Transmitter Controller Register map ----
+ */
+#define SPDIFTX_CR 0x00 /* Control Register */
+#define SPDIFTX_MR 0x04 /* Mode Register */
+#define SPDIFTX_CDR 0x0C /* Common Data Register */
+
+#define SPDIFTX_IER 0x14 /* Interrupt Enable Register */
+#define SPDIFTX_IDR 0x18 /* Interrupt Disable Register */
+#define SPDIFTX_IMR 0x1C /* Interrupt Mask Register */
+#define SPDIFTX_ISR 0x20 /* Interrupt Status Register */
+
+#define SPDIFTX_CH1UD(reg) (0x50 + (reg) * 4) /* User Data 1 Register x */
+#define SPDIFTX_CH1S(reg) (0x80 + (reg) * 4) /* Channel Status 1 Register x */
+
+#define SPDIFTX_VERSION 0xF0
+
+/*
+ * ---- Control Register (Write-only) ----
+ */
+#define SPDIFTX_CR_SWRST BIT(0) /* Software Reset */
+#define SPDIFTX_CR_FCLR BIT(1) /* FIFO clear */
+
+/*
+ * ---- Mode Register (Read/Write) ----
+ */
+/* Transmit Enable */
+#define SPDIFTX_MR_TXEN_MASK GENMASK(0, 0)
+#define SPDIFTX_MR_TXEN_DISABLE (0 << 0)
+#define SPDIFTX_MR_TXEN_ENABLE (1 << 0)
+
+/* Multichannel Transfer */
+#define SPDIFTX_MR_MULTICH_MASK GENAMSK(1, 1)
+#define SPDIFTX_MR_MULTICH_MONO (0 << 1)
+#define SPDIFTX_MR_MULTICH_DUAL (1 << 1)
+
+/* Data Word Endian Mode */
+#define SPDIFTX_MR_ENDIAN_MASK GENMASK(2, 2)
+#define SPDIFTX_MR_ENDIAN_LITTLE (0 << 2)
+#define SPDIFTX_MR_ENDIAN_BIG (1 << 2)
+
+/* Data Justification */
+#define SPDIFTX_MR_JUSTIFY_MASK GENMASK(3, 3)
+#define SPDIFTX_MR_JUSTIFY_LSB (0 << 3)
+#define SPDIFTX_MR_JUSTIFY_MSB (1 << 3)
+
+/* Common Audio Register Transfer Mode */
+#define SPDIFTX_MR_CMODE_MASK GENMASK(5, 4)
+#define SPDIFTX_MR_CMODE_INDEX_ACCESS (0 << 4)
+#define SPDIFTX_MR_CMODE_TOGGLE_ACCESS (1 << 4)
+#define SPDIFTX_MR_CMODE_INTERLVD_ACCESS (2 << 4)
+
+/* Valid Bits per Sample */
+#define SPDIFTX_MR_VBPS_MASK GENMASK(13, 8)
+#define SPDIFTX_MR_VBPS(bps) (((bps) << 8) & SPDIFTX_MR_VBPS_MASK)
+
+/* Chunk Size */
+#define SPDIFTX_MR_CHUNK_MASK GENMASK(19, 16)
+#define SPDIFTX_MR_CHUNK(size) (((size) << 16) & SPDIFTX_MR_CHUNK_MASK)
+
+/* Validity Bits for Channels 1 and 2 */
+#define SPDIFTX_MR_VALID1 BIT(24)
+#define SPDIFTX_MR_VALID2 BIT(25)
+
+/* Disable Null Frame on underrun */
+#define SPDIFTX_MR_DNFR_MASK GENMASK(27, 27)
+#define SPDIFTX_MR_DNFR_INVALID (0 << 27)
+#define SPDIFTX_MR_DNFR_VALID (1 << 27)
+
+/* Bytes per Sample */
+#define SPDIFTX_MR_BPS_MASK GENMASK(29, 28)
+#define SPDIFTX_MR_BPS(bytes) \
+ ((((bytes) - 1) << 28) & SPDIFTX_MR_BPS_MASK)
+
+/*
+ * ---- Interrupt Enable/Disable/Mask/Status Register (Write/Read-only) ----
+ */
+#define SPDIFTX_IR_TXRDY BIT(0)
+#define SPDIFTX_IR_TXEMPTY BIT(1)
+#define SPDIFTX_IR_TXFULL BIT(2)
+#define SPDIFTX_IR_TXCHUNK BIT(3)
+#define SPDIFTX_IR_TXUDR BIT(4)
+#define SPDIFTX_IR_TXOVR BIT(5)
+#define SPDIFTX_IR_CSRDY BIT(6)
+#define SPDIFTX_IR_UDRDY BIT(7)
+#define SPDIFTX_IR_TXRDYCH(ch) BIT((ch) + 8)
+#define SPDIFTX_IR_SECE BIT(10)
+#define SPDIFTX_IR_TXUDRCH(ch) BIT((ch) + 11)
+#define SPDIFTX_IR_BEND BIT(13)
+
+static bool mchp_spdiftx_readable_reg(struct device *dev, unsigned int reg)
+{
+ switch (reg) {
+ case SPDIFTX_MR:
+ case SPDIFTX_IMR:
+ case SPDIFTX_ISR:
+ case SPDIFTX_CH1UD(0):
+ case SPDIFTX_CH1UD(1):
+ case SPDIFTX_CH1UD(2):
+ case SPDIFTX_CH1UD(3):
+ case SPDIFTX_CH1UD(4):
+ case SPDIFTX_CH1UD(5):
+ case SPDIFTX_CH1S(0):
+ case SPDIFTX_CH1S(1):
+ case SPDIFTX_CH1S(2):
+ case SPDIFTX_CH1S(3):
+ case SPDIFTX_CH1S(4):
+ case SPDIFTX_CH1S(5):
+ return true;
+ default:
+ return false;
+ }
+}
+
+static bool mchp_spdiftx_writeable_reg(struct device *dev, unsigned int reg)
+{
+ switch (reg) {
+ case SPDIFTX_CR:
+ case SPDIFTX_MR:
+ case SPDIFTX_CDR:
+ case SPDIFTX_IER:
+ case SPDIFTX_IDR:
+ case SPDIFTX_CH1UD(0):
+ case SPDIFTX_CH1UD(1):
+ case SPDIFTX_CH1UD(2):
+ case SPDIFTX_CH1UD(3):
+ case SPDIFTX_CH1UD(4):
+ case SPDIFTX_CH1UD(5):
+ case SPDIFTX_CH1S(0):
+ case SPDIFTX_CH1S(1):
+ case SPDIFTX_CH1S(2):
+ case SPDIFTX_CH1S(3):
+ case SPDIFTX_CH1S(4):
+ case SPDIFTX_CH1S(5):
+ return true;
+ default:
+ return false;
+ }
+}
+
+static bool mchp_spdiftx_precious_reg(struct device *dev, unsigned int reg)
+{
+ switch (reg) {
+ case SPDIFTX_CDR:
+ case SPDIFTX_ISR:
+ return true;
+ default:
+ return false;
+ }
+}
+
+static const struct regmap_config mchp_spdiftx_regmap_config = {
+ .reg_bits = 32,
+ .reg_stride = 4,
+ .val_bits = 32,
+ .max_register = SPDIFTX_VERSION,
+ .readable_reg = mchp_spdiftx_readable_reg,
+ .writeable_reg = mchp_spdiftx_writeable_reg,
+ .precious_reg = mchp_spdiftx_precious_reg,
+};
+
+#define SPDIFTX_GCLK_RATIO 128
+
+#define SPDIFTX_CS_BITS 192
+#define SPDIFTX_UD_BITS 192
+
+struct mchp_spdiftx_mixer_control {
+ unsigned char ch_stat[SPDIFTX_CS_BITS / 8];
+ unsigned char user_data[SPDIFTX_UD_BITS / 8];
+ spinlock_t lock; /* exclusive access to control data */
+};
+
+struct mchp_spdiftx_dev {
+ struct mchp_spdiftx_mixer_control control;
+ struct snd_dmaengine_dai_dma_data playback;
+ struct device *dev;
+ struct regmap *regmap;
+ struct clk *pclk;
+ struct clk *gclk;
+ unsigned int fmt;
+ unsigned int gclk_enabled:1;
+};
+
+static inline int mchp_spdiftx_is_running(struct mchp_spdiftx_dev *dev)
+{
+ u32 mr;
+
+ regmap_read(dev->regmap, SPDIFTX_MR, &mr);
+ return !!(mr & SPDIFTX_MR_TXEN_ENABLE);
+}
+
+static void mchp_spdiftx_channel_status_write(struct mchp_spdiftx_dev *dev)
+{
+ struct mchp_spdiftx_mixer_control *ctrl = &dev->control;
+ u32 val;
+ int i;
+
+ for (i = 0; i < ARRAY_SIZE(ctrl->ch_stat) / 4; i++) {
+ val = (ctrl->ch_stat[(i * 4) + 0] << 0) |
+ (ctrl->ch_stat[(i * 4) + 1] << 8) |
+ (ctrl->ch_stat[(i * 4) + 2] << 16) |
+ (ctrl->ch_stat[(i * 4) + 3] << 24);
+
+ regmap_write(dev->regmap, SPDIFTX_CH1S(i), val);
+ }
+}
+
+static void mchp_spdiftx_user_data_write(struct mchp_spdiftx_dev *dev)
+{
+ struct mchp_spdiftx_mixer_control *ctrl = &dev->control;
+ u32 val;
+ int i;
+
+ for (i = 0; i < ARRAY_SIZE(ctrl->user_data) / 4; i++) {
+ val = (ctrl->user_data[(i * 4) + 0] << 0) |
+ (ctrl->user_data[(i * 4) + 1] << 8) |
+ (ctrl->user_data[(i * 4) + 2] << 16) |
+ (ctrl->user_data[(i * 4) + 3] << 24);
+
+ regmap_write(dev->regmap, SPDIFTX_CH1UD(i), val);
+ }
+}
+
+static irqreturn_t mchp_spdiftx_interrupt(int irq, void *dev_id)
+{
+ struct mchp_spdiftx_dev *dev = dev_id;
+ struct mchp_spdiftx_mixer_control *ctrl = &dev->control;
+ u32 sr, imr, pending, idr = 0;
+
+ regmap_read(dev->regmap, SPDIFTX_ISR, &sr);
+ regmap_read(dev->regmap, SPDIFTX_IMR, &imr);
+ pending = sr & imr;
+
+ if (!pending)
+ return IRQ_NONE;
+
+ if (pending & SPDIFTX_IR_TXUDR) {
+ dev_warn(dev->dev, "underflow detected\n");
+ idr |= SPDIFTX_IR_TXUDR;
+ }
+
+ if (pending & SPDIFTX_IR_TXOVR) {
+ dev_warn(dev->dev, "overflow detected\n");
+ idr |= SPDIFTX_IR_TXOVR;
+ }
+
+ if (pending & SPDIFTX_IR_UDRDY) {
+ spin_lock(&ctrl->lock);
+ mchp_spdiftx_user_data_write(dev);
+ spin_unlock(&ctrl->lock);
+ idr |= SPDIFTX_IR_UDRDY;
+ }
+
+ if (pending & SPDIFTX_IR_CSRDY) {
+ spin_lock(&ctrl->lock);
+ mchp_spdiftx_channel_status_write(dev);
+ spin_unlock(&ctrl->lock);
+ idr |= SPDIFTX_IR_CSRDY;
+ }
+
+ regmap_write(dev->regmap, SPDIFTX_IDR, idr);
+
+ return IRQ_HANDLED;
+}
+
+static int mchp_spdiftx_dai_startup(struct snd_pcm_substream *substream,
+ struct snd_soc_dai *dai)
+{
+ struct mchp_spdiftx_dev *dev = snd_soc_dai_get_drvdata(dai);
+
+ /* Software reset the IP */
+ regmap_write(dev->regmap, SPDIFTX_CR,
+ SPDIFTX_CR_SWRST | SPDIFTX_CR_FCLR);
+
+ return 0;
+}
+
+static void mchp_spdiftx_dai_shutdown(struct snd_pcm_substream *substream,
+ struct snd_soc_dai *dai)
+{
+ struct mchp_spdiftx_dev *dev = snd_soc_dai_get_drvdata(dai);
+
+ /* Disable interrupts */
+ regmap_write(dev->regmap, SPDIFTX_IDR, 0xffffffff);
+}
+
+static int mchp_spdiftx_trigger(struct snd_pcm_substream *substream, int cmd,
+ struct snd_soc_dai *dai)
+{
+ struct mchp_spdiftx_dev *dev = snd_soc_dai_get_drvdata(dai);
+ struct mchp_spdiftx_mixer_control *ctrl = &dev->control;
+ u32 mr;
+ int running;
+ int ret;
+
+ /* do not start/stop while channel status or user data is updated */
+ spin_lock(&ctrl->lock);
+ regmap_read(dev->regmap, SPDIFTX_MR, &mr);
+ running = !!(mr & SPDIFTX_MR_TXEN_ENABLE);
+
+ switch (cmd) {
+ case SNDRV_PCM_TRIGGER_START:
+ case SNDRV_PCM_TRIGGER_RESUME:
+ case SNDRV_PCM_TRIGGER_PAUSE_RELEASE:
+ if (!running) {
+ mr &= ~SPDIFTX_MR_TXEN_MASK;
+ mr |= SPDIFTX_MR_TXEN_ENABLE;
+ }
+ break;
+ case SNDRV_PCM_TRIGGER_STOP:
+ case SNDRV_PCM_TRIGGER_SUSPEND:
+ case SNDRV_PCM_TRIGGER_PAUSE_PUSH:
+ if (running) {
+ mr &= ~SPDIFTX_MR_TXEN_MASK;
+ mr |= SPDIFTX_MR_TXEN_DISABLE;
+ }
+ break;
+ default:
+ spin_unlock(&ctrl->lock);
+ return -EINVAL;
+ }
+
+ ret = regmap_write(dev->regmap, SPDIFTX_MR, mr);
+ spin_unlock(&ctrl->lock);
+ if (ret)
+ dev_err(dev->dev, "unable to disable TX: %d\n", ret);
+
+ return ret;
+}
+
+static int mchp_spdiftx_hw_params(struct snd_pcm_substream *substream,
+ struct snd_pcm_hw_params *params,
+ struct snd_soc_dai *dai)
+{
+ unsigned long flags;
+ struct mchp_spdiftx_dev *dev = snd_soc_dai_get_drvdata(dai);
+ struct mchp_spdiftx_mixer_control *ctrl = &dev->control;
+ u32 mr;
+ unsigned int bps = params_physical_width(params) / 8;
+ int ret;
+
+ dev_dbg(dev->dev, "%s() rate=%u format=%#x width=%u channels=%u\n",
+ __func__, params_rate(params), params_format(params),
+ params_width(params), params_channels(params));
+
+ if (substream->stream == SNDRV_PCM_STREAM_CAPTURE) {
+ dev_err(dev->dev, "Capture is not supported\n");
+ return -EINVAL;
+ }
+
+ regmap_read(dev->regmap, SPDIFTX_MR, &mr);
+
+ if (mr & SPDIFTX_MR_TXEN_ENABLE) {
+ dev_err(dev->dev, "PCM already running\n");
+ return -EBUSY;
+ }
+
+ /* Defaults: Toggle mode, justify to LSB, chunksize 1 */
+ mr = SPDIFTX_MR_CMODE_TOGGLE_ACCESS | SPDIFTX_MR_JUSTIFY_LSB;
+ dev->playback.maxburst = 1;
+ switch (params_channels(params)) {
+ case 1:
+ mr |= SPDIFTX_MR_MULTICH_MONO;
+ break;
+ case 2:
+ mr |= SPDIFTX_MR_MULTICH_DUAL;
+ if (bps > 2)
+ dev->playback.maxburst = 2;
+ break;
+ default:
+ dev_err(dev->dev, "unsupported number of channels: %d\n",
+ params_channels(params));
+ return -EINVAL;
+ }
+ mr |= SPDIFTX_MR_CHUNK(dev->playback.maxburst);
+
+ switch (params_format(params)) {
+ case SNDRV_PCM_FORMAT_S8:
+ mr |= SPDIFTX_MR_VBPS(8);
+ break;
+ case SNDRV_PCM_FORMAT_S16_BE:
+ mr |= SPDIFTX_MR_ENDIAN_BIG;
+ fallthrough;
+ case SNDRV_PCM_FORMAT_S16_LE:
+ mr |= SPDIFTX_MR_VBPS(16);
+ break;
+ case SNDRV_PCM_FORMAT_S18_3BE:
+ mr |= SPDIFTX_MR_ENDIAN_BIG;
+ fallthrough;
+ case SNDRV_PCM_FORMAT_S18_3LE:
+ mr |= SPDIFTX_MR_VBPS(18);
+ break;
+ case SNDRV_PCM_FORMAT_S20_3BE:
+ mr |= SPDIFTX_MR_ENDIAN_BIG;
+ fallthrough;
+ case SNDRV_PCM_FORMAT_S20_3LE:
+ mr |= SPDIFTX_MR_VBPS(20);
+ break;
+ case SNDRV_PCM_FORMAT_S24_3BE:
+ mr |= SPDIFTX_MR_ENDIAN_BIG;
+ fallthrough;
+ case SNDRV_PCM_FORMAT_S24_3LE:
+ mr |= SPDIFTX_MR_VBPS(24);
+ break;
+ case SNDRV_PCM_FORMAT_S24_BE:
+ mr |= SPDIFTX_MR_ENDIAN_BIG;
+ fallthrough;
+ case SNDRV_PCM_FORMAT_S24_LE:
+ mr |= SPDIFTX_MR_VBPS(24);
+ break;
+ case SNDRV_PCM_FORMAT_S32_BE:
+ mr |= SPDIFTX_MR_ENDIAN_BIG;
+ fallthrough;
+ case SNDRV_PCM_FORMAT_S32_LE:
+ mr |= SPDIFTX_MR_VBPS(32);
+ break;
+ default:
+ dev_err(dev->dev, "unsupported PCM format: %d\n",
+ params_format(params));
+ return -EINVAL;
+ }
+
+ mr |= SPDIFTX_MR_BPS(bps);
+
+ spin_lock_irqsave(&ctrl->lock, flags);
+ ctrl->ch_stat[3] &= ~IEC958_AES3_CON_FS;
+ switch (params_rate(params)) {
+ case 22050:
+ ctrl->ch_stat[3] |= IEC958_AES3_CON_FS_22050;
+ break;
+ case 24000:
+ ctrl->ch_stat[3] |= IEC958_AES3_CON_FS_24000;
+ break;
+ case 32000:
+ ctrl->ch_stat[3] |= IEC958_AES3_CON_FS_32000;
+ break;
+ case 44100:
+ ctrl->ch_stat[3] |= IEC958_AES3_CON_FS_44100;
+ break;
+ case 48000:
+ ctrl->ch_stat[3] |= IEC958_AES3_CON_FS_48000;
+ break;
+ case 88200:
+ ctrl->ch_stat[3] |= IEC958_AES3_CON_FS_88200;
+ break;
+ case 96000:
+ ctrl->ch_stat[3] |= IEC958_AES3_CON_FS_96000;
+ break;
+ case 176400:
+ ctrl->ch_stat[3] |= IEC958_AES3_CON_FS_176400;
+ break;
+ case 192000:
+ ctrl->ch_stat[3] |= IEC958_AES3_CON_FS_192000;
+ break;
+ case 8000:
+ case 11025:
+ case 16000:
+ case 64000:
+ ctrl->ch_stat[3] |= IEC958_AES3_CON_FS_NOTID;
+ break;
+ default:
+ dev_err(dev->dev, "unsupported sample frequency: %u\n",
+ params_rate(params));
+ spin_unlock_irqrestore(&ctrl->lock, flags);
+ return -EINVAL;
+ }
+ mchp_spdiftx_channel_status_write(dev);
+ spin_unlock_irqrestore(&ctrl->lock, flags);
+
+ if (dev->gclk_enabled) {
+ clk_disable_unprepare(dev->gclk);
+ dev->gclk_enabled = 0;
+ }
+ ret = clk_set_rate(dev->gclk, params_rate(params) *
+ SPDIFTX_GCLK_RATIO);
+ if (ret) {
+ dev_err(dev->dev,
+ "unable to change gclk rate to: rate %u * ratio %u\n",
+ params_rate(params), SPDIFTX_GCLK_RATIO);
+ return ret;
+ }
+ ret = clk_prepare_enable(dev->gclk);
+ if (ret) {
+ dev_err(dev->dev, "unable to enable gclk: %d\n", ret);
+ return ret;
+ }
+ dev->gclk_enabled = 1;
+ dev_dbg(dev->dev, "%s(): GCLK set to %d\n", __func__,
+ params_rate(params) * SPDIFTX_GCLK_RATIO);
+
+ /* Enable interrupts */
+ regmap_write(dev->regmap, SPDIFTX_IER,
+ SPDIFTX_IR_TXUDR | SPDIFTX_IR_TXOVR);
+
+ regmap_write(dev->regmap, SPDIFTX_MR, mr);
+
+ return 0;
+}
+
+static int mchp_spdiftx_hw_free(struct snd_pcm_substream *substream,
+ struct snd_soc_dai *dai)
+{
+ struct mchp_spdiftx_dev *dev = snd_soc_dai_get_drvdata(dai);
+
+ regmap_write(dev->regmap, SPDIFTX_IDR,
+ SPDIFTX_IR_TXUDR | SPDIFTX_IR_TXOVR);
+ if (dev->gclk_enabled) {
+ clk_disable_unprepare(dev->gclk);
+ dev->gclk_enabled = 0;
+ }
+
+ return regmap_write(dev->regmap, SPDIFTX_CR,
+ SPDIFTX_CR_SWRST | SPDIFTX_CR_FCLR);
+}
+
+static const struct snd_soc_dai_ops mchp_spdiftx_dai_ops = {
+ .startup = mchp_spdiftx_dai_startup,
+ .shutdown = mchp_spdiftx_dai_shutdown,
+ .trigger = mchp_spdiftx_trigger,
+ .hw_params = mchp_spdiftx_hw_params,
+ .hw_free = mchp_spdiftx_hw_free,
+};
+
+#define MCHP_SPDIFTX_RATES SNDRV_PCM_RATE_8000_192000
+
+#define MCHP_SPDIFTX_FORMATS (SNDRV_PCM_FMTBIT_S8 | \
+ SNDRV_PCM_FMTBIT_S16_LE | \
+ SNDRV_PCM_FMTBIT_U16_BE | \
+ SNDRV_PCM_FMTBIT_S18_3LE | \
+ SNDRV_PCM_FMTBIT_S18_3BE | \
+ SNDRV_PCM_FMTBIT_S20_3LE | \
+ SNDRV_PCM_FMTBIT_S20_3BE | \
+ SNDRV_PCM_FMTBIT_S24_3LE | \
+ SNDRV_PCM_FMTBIT_S24_3BE | \
+ SNDRV_PCM_FMTBIT_S24_LE | \
+ SNDRV_PCM_FMTBIT_S24_BE | \
+ SNDRV_PCM_FMTBIT_S32_LE | \
+ SNDRV_PCM_FMTBIT_S32_BE \
+ )
+
+static int mchp_spdiftx_info(struct snd_kcontrol *kcontrol,
+ struct snd_ctl_elem_info *uinfo)
+{
+ uinfo->type = SNDRV_CTL_ELEM_TYPE_IEC958;
+ uinfo->count = 1;
+
+ return 0;
+}
+
+static int mchp_spdiftx_cs_get(struct snd_kcontrol *kcontrol,
+ struct snd_ctl_elem_value *uvalue)
+{
+ unsigned long flags;
+ struct snd_soc_dai *dai = snd_kcontrol_chip(kcontrol);
+ struct mchp_spdiftx_dev *dev = snd_soc_dai_get_drvdata(dai);
+ struct mchp_spdiftx_mixer_control *ctrl = &dev->control;
+
+ spin_lock_irqsave(&ctrl->lock, flags);
+ memcpy(uvalue->value.iec958.status, ctrl->ch_stat,
+ sizeof(ctrl->ch_stat));
+ spin_unlock_irqrestore(&ctrl->lock, flags);
+
+ return 0;
+}
+
+static int mchp_spdiftx_cs_put(struct snd_kcontrol *kcontrol,
+ struct snd_ctl_elem_value *uvalue)
+{
+ unsigned long flags;
+ struct snd_soc_dai *dai = snd_kcontrol_chip(kcontrol);
+ struct mchp_spdiftx_dev *dev = snd_soc_dai_get_drvdata(dai);
+ struct mchp_spdiftx_mixer_control *ctrl = &dev->control;
+ int changed = 0;
+ int i;
+
+ spin_lock_irqsave(&ctrl->lock, flags);
+ for (i = 0; i < ARRAY_SIZE(ctrl->ch_stat); i++) {
+ if (ctrl->ch_stat[i] != uvalue->value.iec958.status[i])
+ changed = 1;
+ ctrl->ch_stat[i] = uvalue->value.iec958.status[i];
+ }
+
+ if (changed) {
+ /* don't enable IP while we copy the channel status */
+ if (mchp_spdiftx_is_running(dev)) {
+ /*
+ * if SPDIF is running, wait for interrupt to write
+ * channel status
+ */
+ regmap_write(dev->regmap, SPDIFTX_IER,
+ SPDIFTX_IR_CSRDY);
+ } else {
+ mchp_spdiftx_channel_status_write(dev);
+ }
+ }
+ spin_unlock_irqrestore(&ctrl->lock, flags);
+
+ return changed;
+}
+
+static int mchp_spdiftx_cs_mask(struct snd_kcontrol *kcontrol,
+ struct snd_ctl_elem_value *uvalue)
+{
+ memset(uvalue->value.iec958.status, 0xff,
+ sizeof(uvalue->value.iec958.status));
+
+ return 0;
+}
+
+static int mchp_spdiftx_subcode_get(struct snd_kcontrol *kcontrol,
+ struct snd_ctl_elem_value *uvalue)
+{
+ struct snd_soc_dai *dai = snd_kcontrol_chip(kcontrol);
+ struct mchp_spdiftx_dev *dev = snd_soc_dai_get_drvdata(dai);
+ struct mchp_spdiftx_mixer_control *ctrl = &dev->control;
+ unsigned long flags;
+
+ spin_lock_irqsave(&ctrl->lock, flags);
+ memcpy(uvalue->value.iec958.subcode, ctrl->user_data,
+ sizeof(ctrl->user_data));
+ spin_unlock_irqrestore(&ctrl->lock, flags);
+
+ return 0;
+}
+
+static int mchp_spdiftx_subcode_put(struct snd_kcontrol *kcontrol,
+ struct snd_ctl_elem_value *uvalue)
+{
+ unsigned long flags;
+ struct snd_soc_dai *dai = snd_kcontrol_chip(kcontrol);
+ struct mchp_spdiftx_dev *dev = snd_soc_dai_get_drvdata(dai);
+ struct mchp_spdiftx_mixer_control *ctrl = &dev->control;
+ int changed = 0;
+ int i;
+
+ spin_lock_irqsave(&ctrl->lock, flags);
+ for (i = 0; i < ARRAY_SIZE(ctrl->user_data); i++) {
+ if (ctrl->user_data[i] != uvalue->value.iec958.subcode[i])
+ changed = 1;
+
+ ctrl->user_data[i] = uvalue->value.iec958.subcode[i];
+ }
+ if (changed) {
+ if (mchp_spdiftx_is_running(dev)) {
+ /*
+ * if SPDIF is running, wait for interrupt to write
+ * user data
+ */
+ regmap_write(dev->regmap, SPDIFTX_IER,
+ SPDIFTX_IR_UDRDY);
+ } else {
+ mchp_spdiftx_user_data_write(dev);
+ }
+ }
+ spin_unlock_irqrestore(&ctrl->lock, flags);
+
+ return changed;
+}
+
+static struct snd_kcontrol_new mchp_spdiftx_ctrls[] = {
+ /* Channel status controller */
+ {
+ .iface = SNDRV_CTL_ELEM_IFACE_PCM,
+ .name = SNDRV_CTL_NAME_IEC958("", PLAYBACK, DEFAULT),
+ .access = SNDRV_CTL_ELEM_ACCESS_READWRITE |
+ SNDRV_CTL_ELEM_ACCESS_VOLATILE,
+ .info = mchp_spdiftx_info,
+ .get = mchp_spdiftx_cs_get,
+ .put = mchp_spdiftx_cs_put,
+ },
+ {
+ .iface = SNDRV_CTL_ELEM_IFACE_PCM,
+ .name = SNDRV_CTL_NAME_IEC958("", PLAYBACK, MASK),
+ .access = SNDRV_CTL_ELEM_ACCESS_READ,
+ SNDRV_CTL_ELEM_ACCESS_VOLATILE,
+ .info = mchp_spdiftx_info,
+ .get = mchp_spdiftx_cs_mask,
+ },
+ /* User bits controller */
+ {
+ .iface = SNDRV_CTL_ELEM_IFACE_PCM,
+ .name = "IEC958 Subcode Playback Default",
+ .access = SNDRV_CTL_ELEM_ACCESS_READWRITE,
+ .info = mchp_spdiftx_info,
+ .get = mchp_spdiftx_subcode_get,
+ .put = mchp_spdiftx_subcode_put,
+ },
+};
+
+static int mchp_spdiftx_dai_probe(struct snd_soc_dai *dai)
+{
+ struct mchp_spdiftx_dev *dev = snd_soc_dai_get_drvdata(dai);
+ int ret;
+
+ snd_soc_dai_init_dma_data(dai, &dev->playback, NULL);
+
+ ret = clk_prepare_enable(dev->pclk);
+ if (ret) {
+ dev_err(dev->dev,
+ "failed to enable the peripheral clock: %d\n", ret);
+ return ret;
+ }
+
+ /* Add controls */
+ snd_soc_add_dai_controls(dai, mchp_spdiftx_ctrls,
+ ARRAY_SIZE(mchp_spdiftx_ctrls));
+
+ return 0;
+}
+
+static int mchp_spdiftx_dai_remove(struct snd_soc_dai *dai)
+{
+ struct mchp_spdiftx_dev *dev = snd_soc_dai_get_drvdata(dai);
+
+ clk_disable_unprepare(dev->pclk);
+
+ return 0;
+}
+
+static struct snd_soc_dai_driver mchp_spdiftx_dai = {
+ .name = "mchp-spdiftx",
+ .probe = mchp_spdiftx_dai_probe,
+ .remove = mchp_spdiftx_dai_remove,
+ .playback = {
+ .stream_name = "S/PDIF Playback",
+ .channels_min = 1,
+ .channels_max = 2,
+ .rates = MCHP_SPDIFTX_RATES,
+ .formats = MCHP_SPDIFTX_FORMATS,
+ },
+ .ops = &mchp_spdiftx_dai_ops,
+};
+
+static const struct snd_soc_component_driver mchp_spdiftx_component = {
+ .name = "mchp-spdiftx",
+ .legacy_dai_naming = 1,
+};
+
+static const struct of_device_id mchp_spdiftx_dt_ids[] = {
+ {
+ .compatible = "microchip,sama7g5-spdiftx",
+ },
+ { /* sentinel */ }
+};
+MODULE_DEVICE_TABLE(of, mchp_spdiftx_dt_ids);
+
+static int mchp_spdiftx_probe(struct platform_device *pdev)
+{
+ struct mchp_spdiftx_dev *dev;
+ struct resource *mem;
+ struct regmap *regmap;
+ void __iomem *base;
+ struct mchp_spdiftx_mixer_control *ctrl;
+ int irq;
+ int err;
+
+ /* Get memory for driver data. */
+ dev = devm_kzalloc(&pdev->dev, sizeof(*dev), GFP_KERNEL);
+ if (!dev)
+ return -ENOMEM;
+
+ /* Map I/O registers. */
+ base = devm_platform_get_and_ioremap_resource(pdev, 0, &mem);
+ if (IS_ERR(base))
+ return PTR_ERR(base);
+
+ regmap = devm_regmap_init_mmio(&pdev->dev, base,
+ &mchp_spdiftx_regmap_config);
+ if (IS_ERR(regmap))
+ return PTR_ERR(regmap);
+
+ /* Request IRQ */
+ irq = platform_get_irq(pdev, 0);
+ if (irq < 0)
+ return irq;
+
+ err = devm_request_irq(&pdev->dev, irq, mchp_spdiftx_interrupt, 0,
+ dev_name(&pdev->dev), dev);
+ if (err)
+ return err;
+
+ /* Get the peripheral clock */
+ dev->pclk = devm_clk_get(&pdev->dev, "pclk");
+ if (IS_ERR(dev->pclk)) {
+ err = PTR_ERR(dev->pclk);
+ dev_err(&pdev->dev,
+ "failed to get the peripheral clock: %d\n", err);
+ return err;
+ }
+
+ /* Get the generic clock */
+ dev->gclk = devm_clk_get(&pdev->dev, "gclk");
+ if (IS_ERR(dev->gclk)) {
+ err = PTR_ERR(dev->gclk);
+ dev_err(&pdev->dev,
+ "failed to get the PMC generic clock: %d\n", err);
+ return err;
+ }
+
+ ctrl = &dev->control;
+ spin_lock_init(&ctrl->lock);
+
+ /* Init channel status */
+ ctrl->ch_stat[0] = IEC958_AES0_CON_NOT_COPYRIGHT |
+ IEC958_AES0_CON_EMPHASIS_NONE;
+
+ dev->dev = &pdev->dev;
+ dev->regmap = regmap;
+ platform_set_drvdata(pdev, dev);
+
+ dev->playback.addr = (dma_addr_t)mem->start + SPDIFTX_CDR;
+ dev->playback.addr_width = DMA_SLAVE_BUSWIDTH_4_BYTES;
+
+ err = devm_snd_dmaengine_pcm_register(&pdev->dev, NULL, 0);
+ if (err) {
+ dev_err(&pdev->dev, "failed to register PMC: %d\n", err);
+ return err;
+ }
+
+ err = devm_snd_soc_register_component(&pdev->dev,
+ &mchp_spdiftx_component,
+ &mchp_spdiftx_dai, 1);
+ if (err)
+ dev_err(&pdev->dev, "failed to register component: %d\n", err);
+
+ return err;
+}
+
+static struct platform_driver mchp_spdiftx_driver = {
+ .probe = mchp_spdiftx_probe,
+ .driver = {
+ .name = "mchp_spdiftx",
+ .of_match_table = of_match_ptr(mchp_spdiftx_dt_ids),
+ },
+};
+
+module_platform_driver(mchp_spdiftx_driver);
+
+MODULE_AUTHOR("Codrin Ciubotariu <codrin.ciubotariu@microchip.com>");
+MODULE_DESCRIPTION("Microchip S/PDIF TX Controller Driver");
+MODULE_LICENSE("GPL v2");
diff --git a/sound/soc/atmel/mikroe-proto.c b/sound/soc/atmel/mikroe-proto.c
new file mode 100644
index 000000000..954460719
--- /dev/null
+++ b/sound/soc/atmel/mikroe-proto.c
@@ -0,0 +1,184 @@
+// SPDX-License-Identifier: GPL-2.0-only
+/*
+ * ASoC driver for PROTO AudioCODEC (with a WM8731)
+ *
+ * Author: Florian Meier, <koalo@koalo.de>
+ * Copyright 2013
+ */
+
+#include <linux/module.h>
+#include <linux/platform_device.h>
+
+#include <sound/core.h>
+#include <sound/pcm.h>
+#include <sound/soc.h>
+#include <sound/jack.h>
+
+#include "../codecs/wm8731.h"
+
+#define XTAL_RATE 12288000 /* This is fixed on this board */
+
+static int snd_proto_init(struct snd_soc_pcm_runtime *rtd)
+{
+ struct snd_soc_card *card = rtd->card;
+ struct snd_soc_dai *codec_dai = asoc_rtd_to_codec(rtd, 0);
+
+ /* Set proto sysclk */
+ int ret = snd_soc_dai_set_sysclk(codec_dai, WM8731_SYSCLK_XTAL,
+ XTAL_RATE, SND_SOC_CLOCK_IN);
+ if (ret < 0) {
+ dev_err(card->dev, "Failed to set WM8731 SYSCLK: %d\n",
+ ret);
+ return ret;
+ }
+
+ return 0;
+}
+
+static const struct snd_soc_dapm_widget snd_proto_widget[] = {
+ SND_SOC_DAPM_MIC("Microphone Jack", NULL),
+ SND_SOC_DAPM_HP("Headphone Jack", NULL),
+};
+
+static const struct snd_soc_dapm_route snd_proto_route[] = {
+ /* speaker connected to LHPOUT/RHPOUT */
+ {"Headphone Jack", NULL, "LHPOUT"},
+ {"Headphone Jack", NULL, "RHPOUT"},
+
+ /* mic is connected to Mic Jack, with WM8731 Mic Bias */
+ {"MICIN", NULL, "Mic Bias"},
+ {"Mic Bias", NULL, "Microphone Jack"},
+};
+
+/* audio machine driver */
+static struct snd_soc_card snd_proto = {
+ .name = "snd_mikroe_proto",
+ .owner = THIS_MODULE,
+ .dapm_widgets = snd_proto_widget,
+ .num_dapm_widgets = ARRAY_SIZE(snd_proto_widget),
+ .dapm_routes = snd_proto_route,
+ .num_dapm_routes = ARRAY_SIZE(snd_proto_route),
+};
+
+static int snd_proto_probe(struct platform_device *pdev)
+{
+ struct snd_soc_dai_link *dai;
+ struct snd_soc_dai_link_component *comp;
+ struct device_node *np = pdev->dev.of_node;
+ struct device_node *codec_np, *cpu_np;
+ struct device_node *bitclkmaster = NULL;
+ struct device_node *framemaster = NULL;
+ unsigned int dai_fmt;
+ int ret = 0;
+
+ if (!np) {
+ dev_err(&pdev->dev, "No device node supplied\n");
+ return -EINVAL;
+ }
+
+ snd_proto.dev = &pdev->dev;
+ ret = snd_soc_of_parse_card_name(&snd_proto, "model");
+ if (ret)
+ return ret;
+
+ dai = devm_kzalloc(&pdev->dev, sizeof(*dai), GFP_KERNEL);
+ if (!dai)
+ return -ENOMEM;
+
+ /* for cpus/codecs/platforms */
+ comp = devm_kzalloc(&pdev->dev, 3 * sizeof(*comp), GFP_KERNEL);
+ if (!comp)
+ return -ENOMEM;
+
+ snd_proto.dai_link = dai;
+ snd_proto.num_links = 1;
+
+ dai->cpus = &comp[0];
+ dai->num_cpus = 1;
+ dai->codecs = &comp[1];
+ dai->num_codecs = 1;
+ dai->platforms = &comp[2];
+ dai->num_platforms = 1;
+
+ dai->name = "WM8731";
+ dai->stream_name = "WM8731 HiFi";
+ dai->codecs->dai_name = "wm8731-hifi";
+ dai->init = &snd_proto_init;
+
+ codec_np = of_parse_phandle(np, "audio-codec", 0);
+ if (!codec_np) {
+ dev_err(&pdev->dev, "audio-codec node missing\n");
+ return -EINVAL;
+ }
+ dai->codecs->of_node = codec_np;
+
+ cpu_np = of_parse_phandle(np, "i2s-controller", 0);
+ if (!cpu_np) {
+ dev_err(&pdev->dev, "i2s-controller missing\n");
+ ret = -EINVAL;
+ goto put_codec_node;
+ }
+ dai->cpus->of_node = cpu_np;
+ dai->platforms->of_node = cpu_np;
+
+ dai_fmt = snd_soc_daifmt_parse_format(np, NULL);
+ snd_soc_daifmt_parse_clock_provider_as_phandle(np, NULL,
+ &bitclkmaster, &framemaster);
+ if (bitclkmaster != framemaster) {
+ dev_err(&pdev->dev, "Must be the same bitclock and frame master\n");
+ ret = -EINVAL;
+ goto put_cpu_node;
+ }
+ if (bitclkmaster) {
+ if (codec_np == bitclkmaster)
+ dai_fmt |= SND_SOC_DAIFMT_CBP_CFP;
+ else
+ dai_fmt |= SND_SOC_DAIFMT_CBC_CFC;
+ } else {
+ dai_fmt |= snd_soc_daifmt_parse_clock_provider_as_flag(np, NULL);
+ }
+
+
+ dai->dai_fmt = dai_fmt;
+ ret = snd_soc_register_card(&snd_proto);
+ if (ret)
+ dev_err_probe(&pdev->dev, ret,
+ "snd_soc_register_card() failed\n");
+
+
+put_cpu_node:
+ of_node_put(bitclkmaster);
+ of_node_put(framemaster);
+ of_node_put(cpu_np);
+put_codec_node:
+ of_node_put(codec_np);
+ return ret;
+}
+
+static int snd_proto_remove(struct platform_device *pdev)
+{
+ snd_soc_unregister_card(&snd_proto);
+
+ return 0;
+}
+
+static const struct of_device_id snd_proto_of_match[] = {
+ { .compatible = "mikroe,mikroe-proto", },
+ {},
+};
+MODULE_DEVICE_TABLE(of, snd_proto_of_match);
+
+static struct platform_driver snd_proto_driver = {
+ .driver = {
+ .name = "snd-mikroe-proto",
+ .of_match_table = snd_proto_of_match,
+ },
+ .probe = snd_proto_probe,
+ .remove = snd_proto_remove,
+};
+
+module_platform_driver(snd_proto_driver);
+
+MODULE_AUTHOR("Florian Meier");
+MODULE_DESCRIPTION("ASoC Driver for PROTO board (WM8731)");
+MODULE_LICENSE("GPL");
diff --git a/sound/soc/atmel/sam9g20_wm8731.c b/sound/soc/atmel/sam9g20_wm8731.c
new file mode 100644
index 000000000..1430642c8
--- /dev/null
+++ b/sound/soc/atmel/sam9g20_wm8731.c
@@ -0,0 +1,219 @@
+// SPDX-License-Identifier: GPL-2.0-or-later
+/*
+ * sam9g20_wm8731 -- SoC audio for AT91SAM9G20-based
+ * ATMEL AT91SAM9G20ek board.
+ *
+ * Copyright (C) 2005 SAN People
+ * Copyright (C) 2008 Atmel
+ *
+ * Authors: Sedji Gaouaou <sedji.gaouaou@atmel.com>
+ *
+ * Based on ati_b1_wm8731.c by:
+ * Frank Mandarino <fmandarino@endrelia.com>
+ * Copyright 2006 Endrelia Technologies Inc.
+ * Based on corgi.c by:
+ * Copyright 2005 Wolfson Microelectronics PLC.
+ * Copyright 2005 Openedhand Ltd.
+ */
+
+#include <linux/module.h>
+#include <linux/moduleparam.h>
+#include <linux/kernel.h>
+#include <linux/clk.h>
+#include <linux/timer.h>
+#include <linux/interrupt.h>
+#include <linux/platform_device.h>
+#include <linux/i2c.h>
+#include <linux/of.h>
+
+#include <linux/atmel-ssc.h>
+
+#include <sound/core.h>
+#include <sound/pcm.h>
+#include <sound/pcm_params.h>
+#include <sound/soc.h>
+
+#include "../codecs/wm8731.h"
+#include "atmel-pcm.h"
+#include "atmel_ssc_dai.h"
+
+#define MCLK_RATE 12000000
+
+/*
+ * As shipped the board does not have inputs. However, it is relatively
+ * straightforward to modify the board to hook them up so support is left
+ * in the driver.
+ */
+#undef ENABLE_MIC_INPUT
+
+static const struct snd_soc_dapm_widget at91sam9g20ek_dapm_widgets[] = {
+ SND_SOC_DAPM_MIC("Int Mic", NULL),
+ SND_SOC_DAPM_SPK("Ext Spk", NULL),
+};
+
+static const struct snd_soc_dapm_route intercon[] = {
+
+ /* speaker connected to LHPOUT/RHPOUT */
+ {"Ext Spk", NULL, "LHPOUT"},
+ {"Ext Spk", NULL, "RHPOUT"},
+
+ /* mic is connected to Mic Jack, with WM8731 Mic Bias */
+ {"MICIN", NULL, "Mic Bias"},
+ {"Mic Bias", NULL, "Int Mic"},
+};
+
+/*
+ * Logic for a wm8731 as connected on a at91sam9g20ek board.
+ */
+static int at91sam9g20ek_wm8731_init(struct snd_soc_pcm_runtime *rtd)
+{
+ struct snd_soc_dai *codec_dai = asoc_rtd_to_codec(rtd, 0);
+ struct device *dev = rtd->dev;
+ int ret;
+
+ dev_dbg(dev, "%s called\n", __func__);
+
+ ret = snd_soc_dai_set_sysclk(codec_dai, WM8731_SYSCLK_MCLK,
+ MCLK_RATE, SND_SOC_CLOCK_IN);
+ if (ret < 0) {
+ dev_err(dev, "Failed to set WM8731 SYSCLK: %d\n", ret);
+ return ret;
+ }
+
+#ifndef ENABLE_MIC_INPUT
+ snd_soc_dapm_nc_pin(&rtd->card->dapm, "Int Mic");
+#endif
+
+ return 0;
+}
+
+SND_SOC_DAILINK_DEFS(pcm,
+ DAILINK_COMP_ARRAY(COMP_CPU("at91rm9200_ssc.0")),
+ DAILINK_COMP_ARRAY(COMP_CODEC("wm8731.0-001b", "wm8731-hifi")),
+ DAILINK_COMP_ARRAY(COMP_PLATFORM("at91rm9200_ssc.0")));
+
+static struct snd_soc_dai_link at91sam9g20ek_dai = {
+ .name = "WM8731",
+ .stream_name = "WM8731 PCM",
+ .init = at91sam9g20ek_wm8731_init,
+ .dai_fmt = SND_SOC_DAIFMT_I2S | SND_SOC_DAIFMT_NB_NF |
+ SND_SOC_DAIFMT_CBP_CFP,
+ SND_SOC_DAILINK_REG(pcm),
+};
+
+static struct snd_soc_card snd_soc_at91sam9g20ek = {
+ .name = "AT91SAMG20-EK",
+ .owner = THIS_MODULE,
+ .dai_link = &at91sam9g20ek_dai,
+ .num_links = 1,
+
+ .dapm_widgets = at91sam9g20ek_dapm_widgets,
+ .num_dapm_widgets = ARRAY_SIZE(at91sam9g20ek_dapm_widgets),
+ .dapm_routes = intercon,
+ .num_dapm_routes = ARRAY_SIZE(intercon),
+ .fully_routed = true,
+};
+
+static int at91sam9g20ek_audio_probe(struct platform_device *pdev)
+{
+ struct device_node *np = pdev->dev.of_node;
+ struct device_node *codec_np, *cpu_np;
+ struct snd_soc_card *card = &snd_soc_at91sam9g20ek;
+ int ret;
+
+ if (!np) {
+ return -ENODEV;
+ }
+
+ ret = atmel_ssc_set_audio(0);
+ if (ret) {
+ dev_err(&pdev->dev, "ssc channel is not valid: %d\n", ret);
+ return ret;
+ }
+
+ card->dev = &pdev->dev;
+
+ /* Parse device node info */
+ ret = snd_soc_of_parse_card_name(card, "atmel,model");
+ if (ret)
+ goto err;
+
+ ret = snd_soc_of_parse_audio_routing(card,
+ "atmel,audio-routing");
+ if (ret)
+ goto err;
+
+ /* Parse codec info */
+ at91sam9g20ek_dai.codecs->name = NULL;
+ codec_np = of_parse_phandle(np, "atmel,audio-codec", 0);
+ if (!codec_np) {
+ dev_err(&pdev->dev, "codec info missing\n");
+ ret = -EINVAL;
+ goto err;
+ }
+ at91sam9g20ek_dai.codecs->of_node = codec_np;
+
+ /* Parse dai and platform info */
+ at91sam9g20ek_dai.cpus->dai_name = NULL;
+ at91sam9g20ek_dai.platforms->name = NULL;
+ cpu_np = of_parse_phandle(np, "atmel,ssc-controller", 0);
+ if (!cpu_np) {
+ dev_err(&pdev->dev, "dai and pcm info missing\n");
+ of_node_put(codec_np);
+ ret = -EINVAL;
+ goto err;
+ }
+ at91sam9g20ek_dai.cpus->of_node = cpu_np;
+ at91sam9g20ek_dai.platforms->of_node = cpu_np;
+
+ of_node_put(codec_np);
+ of_node_put(cpu_np);
+
+ ret = snd_soc_register_card(card);
+ if (ret) {
+ dev_err_probe(&pdev->dev, ret,
+ "snd_soc_register_card() failed\n");
+ goto err;
+ }
+
+ return 0;
+
+err:
+ atmel_ssc_put_audio(0);
+ return ret;
+}
+
+static int at91sam9g20ek_audio_remove(struct platform_device *pdev)
+{
+ struct snd_soc_card *card = platform_get_drvdata(pdev);
+
+ snd_soc_unregister_card(card);
+ atmel_ssc_put_audio(0);
+
+ return 0;
+}
+
+#ifdef CONFIG_OF
+static const struct of_device_id at91sam9g20ek_wm8731_dt_ids[] = {
+ { .compatible = "atmel,at91sam9g20ek-wm8731-audio", },
+ { }
+};
+MODULE_DEVICE_TABLE(of, at91sam9g20ek_wm8731_dt_ids);
+#endif
+
+static struct platform_driver at91sam9g20ek_audio_driver = {
+ .driver = {
+ .name = "at91sam9g20ek-audio",
+ .of_match_table = of_match_ptr(at91sam9g20ek_wm8731_dt_ids),
+ },
+ .probe = at91sam9g20ek_audio_probe,
+ .remove = at91sam9g20ek_audio_remove,
+};
+
+module_platform_driver(at91sam9g20ek_audio_driver);
+
+/* Module information */
+MODULE_AUTHOR("Sedji Gaouaou <sedji.gaouaou@atmel.com>");
+MODULE_DESCRIPTION("ALSA SoC AT91SAM9G20EK_WM8731");
+MODULE_ALIAS("platform:at91sam9g20ek-audio");
+MODULE_LICENSE("GPL");
diff --git a/sound/soc/atmel/sam9x5_wm8731.c b/sound/soc/atmel/sam9x5_wm8731.c
new file mode 100644
index 000000000..99310e40e
--- /dev/null
+++ b/sound/soc/atmel/sam9x5_wm8731.c
@@ -0,0 +1,210 @@
+// SPDX-License-Identifier: GPL-2.0-or-later
+/*
+ * sam9x5_wm8731 -- SoC audio for AT91SAM9X5-based boards
+ * that are using WM8731 as codec.
+ *
+ * Copyright (C) 2011 Atmel,
+ * Nicolas Ferre <nicolas.ferre@atmel.com>
+ *
+ * Copyright (C) 2013 Paratronic,
+ * Richard Genoud <richard.genoud@gmail.com>
+ *
+ * Based on sam9g20_wm8731.c by:
+ * Sedji Gaouaou <sedji.gaouaou@atmel.com>
+ */
+#include <linux/of.h>
+#include <linux/export.h>
+#include <linux/module.h>
+#include <linux/mod_devicetable.h>
+#include <linux/platform_device.h>
+#include <linux/device.h>
+
+#include <sound/soc.h>
+#include <sound/soc-dai.h>
+#include <sound/soc-dapm.h>
+
+#include "../codecs/wm8731.h"
+#include "atmel_ssc_dai.h"
+
+
+#define MCLK_RATE 12288000
+
+#define DRV_NAME "sam9x5-snd-wm8731"
+
+struct sam9x5_drvdata {
+ int ssc_id;
+};
+
+/*
+ * Logic for a wm8731 as connected on a at91sam9x5ek based board.
+ */
+static int sam9x5_wm8731_init(struct snd_soc_pcm_runtime *rtd)
+{
+ struct snd_soc_dai *codec_dai = asoc_rtd_to_codec(rtd, 0);
+ struct device *dev = rtd->dev;
+ int ret;
+
+ dev_dbg(dev, "%s called\n", __func__);
+
+ /* set the codec system clock for DAC and ADC */
+ ret = snd_soc_dai_set_sysclk(codec_dai, WM8731_SYSCLK_XTAL,
+ MCLK_RATE, SND_SOC_CLOCK_IN);
+ if (ret < 0) {
+ dev_err(dev, "Failed to set WM8731 SYSCLK: %d\n", ret);
+ return ret;
+ }
+
+ return 0;
+}
+
+/*
+ * Audio paths on at91sam9x5ek board:
+ *
+ * |A| ------------> | | ---R----> Headphone Jack
+ * |T| <----\ | WM | ---L--/
+ * |9| ---> CLK <--> | 8731 | <--R----- Line In Jack
+ * |1| <------------ | | <--L--/
+ */
+static const struct snd_soc_dapm_widget sam9x5_dapm_widgets[] = {
+ SND_SOC_DAPM_HP("Headphone Jack", NULL),
+ SND_SOC_DAPM_LINE("Line In Jack", NULL),
+};
+
+static int sam9x5_wm8731_driver_probe(struct platform_device *pdev)
+{
+ struct device_node *np = pdev->dev.of_node;
+ struct device_node *codec_np, *cpu_np;
+ struct snd_soc_card *card;
+ struct snd_soc_dai_link *dai;
+ struct sam9x5_drvdata *priv;
+ struct snd_soc_dai_link_component *comp;
+ int ret;
+
+ if (!np) {
+ dev_err(&pdev->dev, "No device node supplied\n");
+ return -EINVAL;
+ }
+
+ card = devm_kzalloc(&pdev->dev, sizeof(*card), GFP_KERNEL);
+ priv = devm_kzalloc(&pdev->dev, sizeof(*priv), GFP_KERNEL);
+ dai = devm_kzalloc(&pdev->dev, sizeof(*dai), GFP_KERNEL);
+ comp = devm_kzalloc(&pdev->dev, 3 * sizeof(*comp), GFP_KERNEL);
+ if (!dai || !card || !priv || !comp) {
+ ret = -ENOMEM;
+ goto out;
+ }
+
+ snd_soc_card_set_drvdata(card, priv);
+
+ card->dev = &pdev->dev;
+ card->owner = THIS_MODULE;
+ card->dai_link = dai;
+ card->num_links = 1;
+ card->dapm_widgets = sam9x5_dapm_widgets;
+ card->num_dapm_widgets = ARRAY_SIZE(sam9x5_dapm_widgets);
+
+ dai->cpus = &comp[0];
+ dai->num_cpus = 1;
+ dai->codecs = &comp[1];
+ dai->num_codecs = 1;
+ dai->platforms = &comp[2];
+ dai->num_platforms = 1;
+
+ dai->name = "WM8731";
+ dai->stream_name = "WM8731 PCM";
+ dai->codecs->dai_name = "wm8731-hifi";
+ dai->init = sam9x5_wm8731_init;
+ dai->dai_fmt = SND_SOC_DAIFMT_DSP_A | SND_SOC_DAIFMT_NB_NF
+ | SND_SOC_DAIFMT_CBP_CFP;
+
+ ret = snd_soc_of_parse_card_name(card, "atmel,model");
+ if (ret) {
+ dev_err(&pdev->dev, "atmel,model node missing\n");
+ goto out;
+ }
+
+ ret = snd_soc_of_parse_audio_routing(card, "atmel,audio-routing");
+ if (ret) {
+ dev_err(&pdev->dev, "atmel,audio-routing node missing\n");
+ goto out;
+ }
+
+ codec_np = of_parse_phandle(np, "atmel,audio-codec", 0);
+ if (!codec_np) {
+ dev_err(&pdev->dev, "atmel,audio-codec node missing\n");
+ ret = -EINVAL;
+ goto out;
+ }
+
+ dai->codecs->of_node = codec_np;
+
+ cpu_np = of_parse_phandle(np, "atmel,ssc-controller", 0);
+ if (!cpu_np) {
+ dev_err(&pdev->dev, "atmel,ssc-controller node missing\n");
+ ret = -EINVAL;
+ goto out_put_codec_np;
+ }
+ dai->cpus->of_node = cpu_np;
+ dai->platforms->of_node = cpu_np;
+
+ priv->ssc_id = of_alias_get_id(cpu_np, "ssc");
+
+ ret = atmel_ssc_set_audio(priv->ssc_id);
+ if (ret != 0) {
+ dev_err(&pdev->dev, "Failed to set SSC %d for audio: %d\n",
+ ret, priv->ssc_id);
+ goto out_put_cpu_np;
+ }
+
+ ret = devm_snd_soc_register_card(&pdev->dev, card);
+ if (ret) {
+ dev_err(&pdev->dev, "Platform device allocation failed\n");
+ goto out_put_audio;
+ }
+
+ dev_dbg(&pdev->dev, "%s ok\n", __func__);
+
+ goto out_put_cpu_np;
+
+out_put_audio:
+ atmel_ssc_put_audio(priv->ssc_id);
+out_put_cpu_np:
+ of_node_put(cpu_np);
+out_put_codec_np:
+ of_node_put(codec_np);
+out:
+ return ret;
+}
+
+static int sam9x5_wm8731_driver_remove(struct platform_device *pdev)
+{
+ struct snd_soc_card *card = platform_get_drvdata(pdev);
+ struct sam9x5_drvdata *priv = card->drvdata;
+
+ atmel_ssc_put_audio(priv->ssc_id);
+
+ return 0;
+}
+
+static const struct of_device_id sam9x5_wm8731_of_match[] = {
+ { .compatible = "atmel,sam9x5-wm8731-audio", },
+ {},
+};
+MODULE_DEVICE_TABLE(of, sam9x5_wm8731_of_match);
+
+static struct platform_driver sam9x5_wm8731_driver = {
+ .driver = {
+ .name = DRV_NAME,
+ .of_match_table = of_match_ptr(sam9x5_wm8731_of_match),
+ },
+ .probe = sam9x5_wm8731_driver_probe,
+ .remove = sam9x5_wm8731_driver_remove,
+};
+module_platform_driver(sam9x5_wm8731_driver);
+
+/* Module information */
+MODULE_AUTHOR("Nicolas Ferre <nicolas.ferre@atmel.com>");
+MODULE_AUTHOR("Richard Genoud <richard.genoud@gmail.com>");
+MODULE_DESCRIPTION("ALSA SoC machine driver for AT91SAM9x5 - WM8731");
+MODULE_LICENSE("GPL");
+MODULE_ALIAS("platform:" DRV_NAME);
diff --git a/sound/soc/atmel/tse850-pcm5142.c b/sound/soc/atmel/tse850-pcm5142.c
new file mode 100644
index 000000000..ef537de77
--- /dev/null
+++ b/sound/soc/atmel/tse850-pcm5142.c
@@ -0,0 +1,446 @@
+// SPDX-License-Identifier: GPL-2.0
+//
+// TSE-850 audio - ASoC driver for the Axentia TSE-850 with a PCM5142 codec
+//
+// Copyright (C) 2016 Axentia Technologies AB
+//
+// Author: Peter Rosin <peda@axentia.se>
+//
+// loop1 relays
+// IN1 +---o +------------+ o---+ OUT1
+// \ /
+// + +
+// | / |
+// +--o +--. |
+// | add | |
+// | V |
+// | .---. |
+// DAC +----------->|Sum|---+
+// | '---' |
+// | |
+// + +
+//
+// IN2 +---o--+------------+--o---+ OUT2
+// loop2 relays
+//
+// The 'loop1' gpio pin controls two relays, which are either in loop
+// position, meaning that input and output are directly connected, or
+// they are in mixer position, meaning that the signal is passed through
+// the 'Sum' mixer. Similarly for 'loop2'.
+//
+// In the above, the 'loop1' relays are inactive, thus feeding IN1 to the
+// mixer (if 'add' is active) and feeding the mixer output to OUT1. The
+// 'loop2' relays are active, short-cutting the TSE-850 from channel 2.
+// IN1, IN2, OUT1 and OUT2 are TSE-850 connectors and DAC is the PCB name
+// of the (filtered) output from the PCM5142 codec.
+
+#include <linux/clk.h>
+#include <linux/gpio.h>
+#include <linux/module.h>
+#include <linux/of.h>
+#include <linux/of_device.h>
+#include <linux/of_gpio.h>
+#include <linux/regulator/consumer.h>
+
+#include <sound/soc.h>
+#include <sound/pcm_params.h>
+
+struct tse850_priv {
+ struct gpio_desc *add;
+ struct gpio_desc *loop1;
+ struct gpio_desc *loop2;
+
+ struct regulator *ana;
+
+ int add_cache;
+ int loop1_cache;
+ int loop2_cache;
+};
+
+static int tse850_get_mux1(struct snd_kcontrol *kctrl,
+ struct snd_ctl_elem_value *ucontrol)
+{
+ struct snd_soc_dapm_context *dapm = snd_soc_dapm_kcontrol_dapm(kctrl);
+ struct snd_soc_card *card = dapm->card;
+ struct tse850_priv *tse850 = snd_soc_card_get_drvdata(card);
+
+ ucontrol->value.enumerated.item[0] = tse850->loop1_cache;
+
+ return 0;
+}
+
+static int tse850_put_mux1(struct snd_kcontrol *kctrl,
+ struct snd_ctl_elem_value *ucontrol)
+{
+ struct snd_soc_dapm_context *dapm = snd_soc_dapm_kcontrol_dapm(kctrl);
+ struct snd_soc_card *card = dapm->card;
+ struct tse850_priv *tse850 = snd_soc_card_get_drvdata(card);
+ struct soc_enum *e = (struct soc_enum *)kctrl->private_value;
+ unsigned int val = ucontrol->value.enumerated.item[0];
+
+ if (val >= e->items)
+ return -EINVAL;
+
+ gpiod_set_value_cansleep(tse850->loop1, val);
+ tse850->loop1_cache = val;
+
+ return snd_soc_dapm_put_enum_double(kctrl, ucontrol);
+}
+
+static int tse850_get_mux2(struct snd_kcontrol *kctrl,
+ struct snd_ctl_elem_value *ucontrol)
+{
+ struct snd_soc_dapm_context *dapm = snd_soc_dapm_kcontrol_dapm(kctrl);
+ struct snd_soc_card *card = dapm->card;
+ struct tse850_priv *tse850 = snd_soc_card_get_drvdata(card);
+
+ ucontrol->value.enumerated.item[0] = tse850->loop2_cache;
+
+ return 0;
+}
+
+static int tse850_put_mux2(struct snd_kcontrol *kctrl,
+ struct snd_ctl_elem_value *ucontrol)
+{
+ struct snd_soc_dapm_context *dapm = snd_soc_dapm_kcontrol_dapm(kctrl);
+ struct snd_soc_card *card = dapm->card;
+ struct tse850_priv *tse850 = snd_soc_card_get_drvdata(card);
+ struct soc_enum *e = (struct soc_enum *)kctrl->private_value;
+ unsigned int val = ucontrol->value.enumerated.item[0];
+
+ if (val >= e->items)
+ return -EINVAL;
+
+ gpiod_set_value_cansleep(tse850->loop2, val);
+ tse850->loop2_cache = val;
+
+ return snd_soc_dapm_put_enum_double(kctrl, ucontrol);
+}
+
+static int tse850_get_mix(struct snd_kcontrol *kctrl,
+ struct snd_ctl_elem_value *ucontrol)
+{
+ struct snd_soc_dapm_context *dapm = snd_soc_dapm_kcontrol_dapm(kctrl);
+ struct snd_soc_card *card = dapm->card;
+ struct tse850_priv *tse850 = snd_soc_card_get_drvdata(card);
+
+ ucontrol->value.enumerated.item[0] = tse850->add_cache;
+
+ return 0;
+}
+
+static int tse850_put_mix(struct snd_kcontrol *kctrl,
+ struct snd_ctl_elem_value *ucontrol)
+{
+ struct snd_soc_dapm_context *dapm = snd_soc_dapm_kcontrol_dapm(kctrl);
+ struct snd_soc_card *card = dapm->card;
+ struct tse850_priv *tse850 = snd_soc_card_get_drvdata(card);
+ int connect = !!ucontrol->value.integer.value[0];
+
+ if (tse850->add_cache == connect)
+ return 0;
+
+ /*
+ * Hmmm, this gpiod_set_value_cansleep call should probably happen
+ * inside snd_soc_dapm_mixer_update_power in the loop.
+ */
+ gpiod_set_value_cansleep(tse850->add, connect);
+ tse850->add_cache = connect;
+
+ snd_soc_dapm_mixer_update_power(dapm, kctrl, connect, NULL);
+ return 1;
+}
+
+static int tse850_get_ana(struct snd_kcontrol *kctrl,
+ struct snd_ctl_elem_value *ucontrol)
+{
+ struct snd_soc_dapm_context *dapm = snd_soc_dapm_kcontrol_dapm(kctrl);
+ struct snd_soc_card *card = dapm->card;
+ struct tse850_priv *tse850 = snd_soc_card_get_drvdata(card);
+ int ret;
+
+ ret = regulator_get_voltage(tse850->ana);
+ if (ret < 0)
+ return ret;
+
+ /*
+ * Map regulator output values like so:
+ * -11.5V to "Low" (enum 0)
+ * 11.5V-12.5V to "12V" (enum 1)
+ * 12.5V-13.5V to "13V" (enum 2)
+ * ...
+ * 18.5V-19.5V to "19V" (enum 8)
+ * 19.5V- to "20V" (enum 9)
+ */
+ if (ret < 11000000)
+ ret = 11000000;
+ else if (ret > 20000000)
+ ret = 20000000;
+ ret -= 11000000;
+ ret = (ret + 500000) / 1000000;
+
+ ucontrol->value.enumerated.item[0] = ret;
+
+ return 0;
+}
+
+static int tse850_put_ana(struct snd_kcontrol *kctrl,
+ struct snd_ctl_elem_value *ucontrol)
+{
+ struct snd_soc_dapm_context *dapm = snd_soc_dapm_kcontrol_dapm(kctrl);
+ struct snd_soc_card *card = dapm->card;
+ struct tse850_priv *tse850 = snd_soc_card_get_drvdata(card);
+ struct soc_enum *e = (struct soc_enum *)kctrl->private_value;
+ unsigned int uV = ucontrol->value.enumerated.item[0];
+ int ret;
+
+ if (uV >= e->items)
+ return -EINVAL;
+
+ /*
+ * Map enum zero (Low) to 2 volts on the regulator, do this since
+ * the ana regulator is supplied by the system 12V voltage and
+ * requesting anything below the system voltage causes the system
+ * voltage to be passed through the regulator. Also, the ana
+ * regulator induces noise when requesting voltages near the
+ * system voltage. So, by mapping Low to 2V, that noise is
+ * eliminated when all that is needed is 12V (the system voltage).
+ */
+ if (uV)
+ uV = 11000000 + (1000000 * uV);
+ else
+ uV = 2000000;
+
+ ret = regulator_set_voltage(tse850->ana, uV, uV);
+ if (ret < 0)
+ return ret;
+
+ return snd_soc_dapm_put_enum_double(kctrl, ucontrol);
+}
+
+static const char * const mux_text[] = { "Mixer", "Loop" };
+
+static const struct soc_enum mux_enum =
+ SOC_ENUM_SINGLE(SND_SOC_NOPM, 0, ARRAY_SIZE(mux_text), mux_text);
+
+static const struct snd_kcontrol_new mux1 =
+ SOC_DAPM_ENUM_EXT("MUX1", mux_enum, tse850_get_mux1, tse850_put_mux1);
+
+static const struct snd_kcontrol_new mux2 =
+ SOC_DAPM_ENUM_EXT("MUX2", mux_enum, tse850_get_mux2, tse850_put_mux2);
+
+#define TSE850_DAPM_SINGLE_EXT(xname, reg, shift, max, invert, xget, xput) \
+{ .iface = SNDRV_CTL_ELEM_IFACE_MIXER, .name = xname, \
+ .info = snd_soc_info_volsw, \
+ .get = xget, \
+ .put = xput, \
+ .private_value = SOC_SINGLE_VALUE(reg, shift, max, invert, 0) }
+
+static const struct snd_kcontrol_new mix[] = {
+ TSE850_DAPM_SINGLE_EXT("IN Switch", SND_SOC_NOPM, 0, 1, 0,
+ tse850_get_mix, tse850_put_mix),
+};
+
+static const char * const ana_text[] = {
+ "Low", "12V", "13V", "14V", "15V", "16V", "17V", "18V", "19V", "20V"
+};
+
+static const struct soc_enum ana_enum =
+ SOC_ENUM_SINGLE(SND_SOC_NOPM, 0, ARRAY_SIZE(ana_text), ana_text);
+
+static const struct snd_kcontrol_new out =
+ SOC_DAPM_ENUM_EXT("ANA", ana_enum, tse850_get_ana, tse850_put_ana);
+
+static const struct snd_soc_dapm_widget tse850_dapm_widgets[] = {
+ SND_SOC_DAPM_LINE("OUT1", NULL),
+ SND_SOC_DAPM_LINE("OUT2", NULL),
+ SND_SOC_DAPM_LINE("IN1", NULL),
+ SND_SOC_DAPM_LINE("IN2", NULL),
+ SND_SOC_DAPM_INPUT("DAC"),
+ SND_SOC_DAPM_AIF_IN("AIFINL", "Playback", 0, SND_SOC_NOPM, 0, 0),
+ SND_SOC_DAPM_AIF_IN("AIFINR", "Playback", 1, SND_SOC_NOPM, 0, 0),
+ SOC_MIXER_ARRAY("MIX", SND_SOC_NOPM, 0, 0, mix),
+ SND_SOC_DAPM_MUX("MUX1", SND_SOC_NOPM, 0, 0, &mux1),
+ SND_SOC_DAPM_MUX("MUX2", SND_SOC_NOPM, 0, 0, &mux2),
+ SND_SOC_DAPM_OUT_DRV("OUT", SND_SOC_NOPM, 0, 0, &out, 1),
+};
+
+/*
+ * These connections are not entirely correct, since both IN1 and IN2
+ * are always fed to MIX (if the "IN switch" is set so), i.e. without
+ * regard to the loop1 and loop2 relays that according to this only
+ * control MUX1 and MUX2 but in fact also control how the input signals
+ * are routed.
+ * But, 1) I don't know how to do it right, and 2) it doesn't seem to
+ * matter in practice since nothing is powered in those sections anyway.
+ */
+static const struct snd_soc_dapm_route tse850_intercon[] = {
+ { "OUT1", NULL, "MUX1" },
+ { "OUT2", NULL, "MUX2" },
+
+ { "MUX1", "Loop", "IN1" },
+ { "MUX1", "Mixer", "OUT" },
+
+ { "MUX2", "Loop", "IN2" },
+ { "MUX2", "Mixer", "OUT" },
+
+ { "OUT", NULL, "MIX" },
+
+ { "MIX", NULL, "DAC" },
+ { "MIX", "IN Switch", "IN1" },
+ { "MIX", "IN Switch", "IN2" },
+
+ /* connect board input to the codec left channel output pin */
+ { "DAC", NULL, "OUTL" },
+};
+
+SND_SOC_DAILINK_DEFS(pcm,
+ DAILINK_COMP_ARRAY(COMP_EMPTY()),
+ DAILINK_COMP_ARRAY(COMP_CODEC(NULL, "pcm512x-hifi")),
+ DAILINK_COMP_ARRAY(COMP_EMPTY()));
+
+static struct snd_soc_dai_link tse850_dailink = {
+ .name = "TSE-850",
+ .stream_name = "TSE-850-PCM",
+ .dai_fmt = SND_SOC_DAIFMT_I2S
+ | SND_SOC_DAIFMT_NB_NF
+ | SND_SOC_DAIFMT_CBP_CFC,
+ SND_SOC_DAILINK_REG(pcm),
+};
+
+static struct snd_soc_card tse850_card = {
+ .name = "TSE-850-ASoC",
+ .owner = THIS_MODULE,
+ .dai_link = &tse850_dailink,
+ .num_links = 1,
+ .dapm_widgets = tse850_dapm_widgets,
+ .num_dapm_widgets = ARRAY_SIZE(tse850_dapm_widgets),
+ .dapm_routes = tse850_intercon,
+ .num_dapm_routes = ARRAY_SIZE(tse850_intercon),
+ .fully_routed = true,
+};
+
+static int tse850_dt_init(struct platform_device *pdev)
+{
+ struct device_node *np = pdev->dev.of_node;
+ struct device_node *codec_np, *cpu_np;
+ struct snd_soc_dai_link *dailink = &tse850_dailink;
+
+ if (!np) {
+ dev_err(&pdev->dev, "only device tree supported\n");
+ return -EINVAL;
+ }
+
+ cpu_np = of_parse_phandle(np, "axentia,cpu-dai", 0);
+ if (!cpu_np) {
+ dev_err(&pdev->dev, "failed to get cpu dai\n");
+ return -EINVAL;
+ }
+ dailink->cpus->of_node = cpu_np;
+ dailink->platforms->of_node = cpu_np;
+ of_node_put(cpu_np);
+
+ codec_np = of_parse_phandle(np, "axentia,audio-codec", 0);
+ if (!codec_np) {
+ dev_err(&pdev->dev, "failed to get codec info\n");
+ return -EINVAL;
+ }
+ dailink->codecs->of_node = codec_np;
+ of_node_put(codec_np);
+
+ return 0;
+}
+
+static int tse850_probe(struct platform_device *pdev)
+{
+ struct snd_soc_card *card = &tse850_card;
+ struct device *dev = card->dev = &pdev->dev;
+ struct tse850_priv *tse850;
+ int ret;
+
+ tse850 = devm_kzalloc(dev, sizeof(*tse850), GFP_KERNEL);
+ if (!tse850)
+ return -ENOMEM;
+
+ snd_soc_card_set_drvdata(card, tse850);
+
+ ret = tse850_dt_init(pdev);
+ if (ret) {
+ dev_err(dev, "failed to init dt info\n");
+ return ret;
+ }
+
+ tse850->add = devm_gpiod_get(dev, "axentia,add", GPIOD_OUT_HIGH);
+ if (IS_ERR(tse850->add))
+ return dev_err_probe(dev, PTR_ERR(tse850->add),
+ "failed to get 'add' gpio\n");
+ tse850->add_cache = 1;
+
+ tse850->loop1 = devm_gpiod_get(dev, "axentia,loop1", GPIOD_OUT_HIGH);
+ if (IS_ERR(tse850->loop1))
+ return dev_err_probe(dev, PTR_ERR(tse850->loop1),
+ "failed to get 'loop1' gpio\n");
+ tse850->loop1_cache = 1;
+
+ tse850->loop2 = devm_gpiod_get(dev, "axentia,loop2", GPIOD_OUT_HIGH);
+ if (IS_ERR(tse850->loop2))
+ return dev_err_probe(dev, PTR_ERR(tse850->loop2),
+ "failed to get 'loop2' gpio\n");
+ tse850->loop2_cache = 1;
+
+ tse850->ana = devm_regulator_get(dev, "axentia,ana");
+ if (IS_ERR(tse850->ana))
+ return dev_err_probe(dev, PTR_ERR(tse850->ana),
+ "failed to get 'ana' regulator\n");
+
+ ret = regulator_enable(tse850->ana);
+ if (ret < 0) {
+ dev_err(dev, "failed to enable the 'ana' regulator\n");
+ return ret;
+ }
+
+ ret = snd_soc_register_card(card);
+ if (ret) {
+ dev_err(dev, "snd_soc_register_card failed\n");
+ goto err_disable_ana;
+ }
+
+ return 0;
+
+err_disable_ana:
+ regulator_disable(tse850->ana);
+ return ret;
+}
+
+static int tse850_remove(struct platform_device *pdev)
+{
+ struct snd_soc_card *card = platform_get_drvdata(pdev);
+ struct tse850_priv *tse850 = snd_soc_card_get_drvdata(card);
+
+ snd_soc_unregister_card(card);
+ regulator_disable(tse850->ana);
+
+ return 0;
+}
+
+static const struct of_device_id tse850_dt_ids[] = {
+ { .compatible = "axentia,tse850-pcm5142", },
+ { /* sentinel */ }
+};
+MODULE_DEVICE_TABLE(of, tse850_dt_ids);
+
+static struct platform_driver tse850_driver = {
+ .driver = {
+ .name = "axentia-tse850-pcm5142",
+ .of_match_table = of_match_ptr(tse850_dt_ids),
+ },
+ .probe = tse850_probe,
+ .remove = tse850_remove,
+};
+
+module_platform_driver(tse850_driver);
+
+/* Module information */
+MODULE_AUTHOR("Peter Rosin <peda@axentia.se>");
+MODULE_DESCRIPTION("ALSA SoC driver for TSE-850 with PCM5142 codec");
+MODULE_LICENSE("GPL v2");