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-rw-r--r--sound/soc/xilinx/Kconfig23
-rw-r--r--sound/soc/xilinx/Makefile7
-rw-r--r--sound/soc/xilinx/xlnx_formatter_pcm.c726
-rw-r--r--sound/soc/xilinx/xlnx_i2s.c258
-rw-r--r--sound/soc/xilinx/xlnx_spdif.c335
5 files changed, 1349 insertions, 0 deletions
diff --git a/sound/soc/xilinx/Kconfig b/sound/soc/xilinx/Kconfig
new file mode 100644
index 000000000..5bd2730aa
--- /dev/null
+++ b/sound/soc/xilinx/Kconfig
@@ -0,0 +1,23 @@
+# SPDX-License-Identifier: GPL-2.0-only
+config SND_SOC_XILINX_I2S
+ tristate "Audio support for the Xilinx I2S"
+ help
+ Select this option to enable Xilinx I2S Audio. This enables
+ I2S playback and capture using xilinx soft IP. In transmitter
+ mode, IP receives audio in AES format, extracts PCM and sends
+ PCM data. In receiver mode, IP receives PCM audio and
+ encapsulates PCM in AES format and sends AES data.
+
+config SND_SOC_XILINX_AUDIO_FORMATTER
+ tristate "Audio support for the Xilinx audio formatter"
+ help
+ Select this option to enable Xilinx audio formatter
+ support. This provides DMA platform device support for
+ audio functionality.
+
+config SND_SOC_XILINX_SPDIF
+ tristate "Audio support for the Xilinx SPDIF"
+ help
+ Select this option to enable Xilinx SPDIF Audio.
+ This provides playback and capture of SPDIF audio in
+ AES format.
diff --git a/sound/soc/xilinx/Makefile b/sound/soc/xilinx/Makefile
new file mode 100644
index 000000000..be7652ce7
--- /dev/null
+++ b/sound/soc/xilinx/Makefile
@@ -0,0 +1,7 @@
+# SPDX-License-Identifier: GPL-2.0-only
+snd-soc-xlnx-i2s-objs := xlnx_i2s.o
+obj-$(CONFIG_SND_SOC_XILINX_I2S) += snd-soc-xlnx-i2s.o
+snd-soc-xlnx-formatter-pcm-objs := xlnx_formatter_pcm.o
+obj-$(CONFIG_SND_SOC_XILINX_AUDIO_FORMATTER) += snd-soc-xlnx-formatter-pcm.o
+snd-soc-xlnx-spdif-objs := xlnx_spdif.o
+obj-$(CONFIG_SND_SOC_XILINX_SPDIF) += snd-soc-xlnx-spdif.o
diff --git a/sound/soc/xilinx/xlnx_formatter_pcm.c b/sound/soc/xilinx/xlnx_formatter_pcm.c
new file mode 100644
index 000000000..ff1fe62fe
--- /dev/null
+++ b/sound/soc/xilinx/xlnx_formatter_pcm.c
@@ -0,0 +1,726 @@
+// SPDX-License-Identifier: GPL-2.0
+//
+// Xilinx ASoC audio formatter support
+//
+// Copyright (C) 2018 Xilinx, Inc.
+//
+// Author: Maruthi Srinivas Bayyavarapu <maruthis@xilinx.com>
+
+#include <linux/clk.h>
+#include <linux/io.h>
+#include <linux/module.h>
+#include <linux/of_address.h>
+#include <linux/of_irq.h>
+#include <linux/sizes.h>
+
+#include <sound/asoundef.h>
+#include <sound/soc.h>
+#include <sound/pcm_params.h>
+
+#define DRV_NAME "xlnx_formatter_pcm"
+
+#define XLNX_S2MM_OFFSET 0
+#define XLNX_MM2S_OFFSET 0x100
+
+#define XLNX_AUD_CORE_CONFIG 0x4
+#define XLNX_AUD_CTRL 0x10
+#define XLNX_AUD_STS 0x14
+
+#define AUD_CTRL_RESET_MASK BIT(1)
+#define AUD_CFG_MM2S_MASK BIT(15)
+#define AUD_CFG_S2MM_MASK BIT(31)
+
+#define XLNX_AUD_FS_MULTIPLIER 0x18
+#define XLNX_AUD_PERIOD_CONFIG 0x1C
+#define XLNX_AUD_BUFF_ADDR_LSB 0x20
+#define XLNX_AUD_BUFF_ADDR_MSB 0x24
+#define XLNX_AUD_XFER_COUNT 0x28
+#define XLNX_AUD_CH_STS_START 0x2C
+#define XLNX_BYTES_PER_CH 0x44
+#define XLNX_AUD_ALIGN_BYTES 64
+
+#define AUD_STS_IOC_IRQ_MASK BIT(31)
+#define AUD_STS_CH_STS_MASK BIT(29)
+#define AUD_CTRL_IOC_IRQ_MASK BIT(13)
+#define AUD_CTRL_TOUT_IRQ_MASK BIT(14)
+#define AUD_CTRL_DMA_EN_MASK BIT(0)
+
+#define CFG_MM2S_CH_MASK GENMASK(11, 8)
+#define CFG_MM2S_CH_SHIFT 8
+#define CFG_MM2S_XFER_MASK GENMASK(14, 13)
+#define CFG_MM2S_XFER_SHIFT 13
+#define CFG_MM2S_PKG_MASK BIT(12)
+
+#define CFG_S2MM_CH_MASK GENMASK(27, 24)
+#define CFG_S2MM_CH_SHIFT 24
+#define CFG_S2MM_XFER_MASK GENMASK(30, 29)
+#define CFG_S2MM_XFER_SHIFT 29
+#define CFG_S2MM_PKG_MASK BIT(28)
+
+#define AUD_CTRL_DATA_WIDTH_SHIFT 16
+#define AUD_CTRL_ACTIVE_CH_SHIFT 19
+#define PERIOD_CFG_PERIODS_SHIFT 16
+
+#define PERIODS_MIN 2
+#define PERIODS_MAX 6
+#define PERIOD_BYTES_MIN 192
+#define PERIOD_BYTES_MAX (50 * 1024)
+#define XLNX_PARAM_UNKNOWN 0
+
+enum bit_depth {
+ BIT_DEPTH_8,
+ BIT_DEPTH_16,
+ BIT_DEPTH_20,
+ BIT_DEPTH_24,
+ BIT_DEPTH_32,
+};
+
+struct xlnx_pcm_drv_data {
+ void __iomem *mmio;
+ bool s2mm_presence;
+ bool mm2s_presence;
+ int s2mm_irq;
+ int mm2s_irq;
+ struct snd_pcm_substream *play_stream;
+ struct snd_pcm_substream *capture_stream;
+ struct clk *axi_clk;
+ unsigned int sysclk;
+};
+
+/*
+ * struct xlnx_pcm_stream_param - stream configuration
+ * @mmio: base address offset
+ * @interleaved: audio channels arrangement in buffer
+ * @xfer_mode: data formatting mode during transfer
+ * @ch_limit: Maximum channels supported
+ * @buffer_size: stream ring buffer size
+ */
+struct xlnx_pcm_stream_param {
+ void __iomem *mmio;
+ bool interleaved;
+ u32 xfer_mode;
+ u32 ch_limit;
+ u64 buffer_size;
+};
+
+static const struct snd_pcm_hardware xlnx_pcm_hardware = {
+ .info = SNDRV_PCM_INFO_INTERLEAVED | SNDRV_PCM_INFO_BLOCK_TRANSFER |
+ SNDRV_PCM_INFO_BATCH | SNDRV_PCM_INFO_PAUSE |
+ SNDRV_PCM_INFO_RESUME,
+ .formats = SNDRV_PCM_FMTBIT_S8 | SNDRV_PCM_FMTBIT_S16_LE |
+ SNDRV_PCM_FMTBIT_S24_LE,
+ .channels_min = 2,
+ .channels_max = 2,
+ .rates = SNDRV_PCM_RATE_8000_192000,
+ .rate_min = 8000,
+ .rate_max = 192000,
+ .buffer_bytes_max = PERIODS_MAX * PERIOD_BYTES_MAX,
+ .period_bytes_min = PERIOD_BYTES_MIN,
+ .period_bytes_max = PERIOD_BYTES_MAX,
+ .periods_min = PERIODS_MIN,
+ .periods_max = PERIODS_MAX,
+};
+
+enum {
+ AES_TO_AES,
+ AES_TO_PCM,
+ PCM_TO_PCM,
+ PCM_TO_AES
+};
+
+static void xlnx_parse_aes_params(u32 chsts_reg1_val, u32 chsts_reg2_val,
+ struct device *dev)
+{
+ u32 padded, srate, bit_depth, status[2];
+
+ if (chsts_reg1_val & IEC958_AES0_PROFESSIONAL) {
+ status[0] = chsts_reg1_val & 0xff;
+ status[1] = (chsts_reg1_val >> 16) & 0xff;
+
+ switch (status[0] & IEC958_AES0_PRO_FS) {
+ case IEC958_AES0_PRO_FS_44100:
+ srate = 44100;
+ break;
+ case IEC958_AES0_PRO_FS_48000:
+ srate = 48000;
+ break;
+ case IEC958_AES0_PRO_FS_32000:
+ srate = 32000;
+ break;
+ case IEC958_AES0_PRO_FS_NOTID:
+ default:
+ srate = XLNX_PARAM_UNKNOWN;
+ break;
+ }
+
+ switch (status[1] & IEC958_AES2_PRO_SBITS) {
+ case IEC958_AES2_PRO_WORDLEN_NOTID:
+ case IEC958_AES2_PRO_SBITS_20:
+ padded = 0;
+ break;
+ case IEC958_AES2_PRO_SBITS_24:
+ padded = 4;
+ break;
+ default:
+ bit_depth = XLNX_PARAM_UNKNOWN;
+ goto log_params;
+ }
+
+ switch (status[1] & IEC958_AES2_PRO_WORDLEN) {
+ case IEC958_AES2_PRO_WORDLEN_20_16:
+ bit_depth = 16 + padded;
+ break;
+ case IEC958_AES2_PRO_WORDLEN_22_18:
+ bit_depth = 18 + padded;
+ break;
+ case IEC958_AES2_PRO_WORDLEN_23_19:
+ bit_depth = 19 + padded;
+ break;
+ case IEC958_AES2_PRO_WORDLEN_24_20:
+ bit_depth = 20 + padded;
+ break;
+ case IEC958_AES2_PRO_WORDLEN_NOTID:
+ default:
+ bit_depth = XLNX_PARAM_UNKNOWN;
+ break;
+ }
+
+ } else {
+ status[0] = (chsts_reg1_val >> 24) & 0xff;
+ status[1] = chsts_reg2_val & 0xff;
+
+ switch (status[0] & IEC958_AES3_CON_FS) {
+ case IEC958_AES3_CON_FS_44100:
+ srate = 44100;
+ break;
+ case IEC958_AES3_CON_FS_48000:
+ srate = 48000;
+ break;
+ case IEC958_AES3_CON_FS_32000:
+ srate = 32000;
+ break;
+ default:
+ srate = XLNX_PARAM_UNKNOWN;
+ break;
+ }
+
+ if (status[1] & IEC958_AES4_CON_MAX_WORDLEN_24)
+ padded = 4;
+ else
+ padded = 0;
+
+ switch (status[1] & IEC958_AES4_CON_WORDLEN) {
+ case IEC958_AES4_CON_WORDLEN_20_16:
+ bit_depth = 16 + padded;
+ break;
+ case IEC958_AES4_CON_WORDLEN_22_18:
+ bit_depth = 18 + padded;
+ break;
+ case IEC958_AES4_CON_WORDLEN_23_19:
+ bit_depth = 19 + padded;
+ break;
+ case IEC958_AES4_CON_WORDLEN_24_20:
+ bit_depth = 20 + padded;
+ break;
+ case IEC958_AES4_CON_WORDLEN_21_17:
+ bit_depth = 17 + padded;
+ break;
+ case IEC958_AES4_CON_WORDLEN_NOTID:
+ default:
+ bit_depth = XLNX_PARAM_UNKNOWN;
+ break;
+ }
+ }
+
+log_params:
+ if (srate != XLNX_PARAM_UNKNOWN)
+ dev_info(dev, "sample rate = %d\n", srate);
+ else
+ dev_info(dev, "sample rate = unknown\n");
+
+ if (bit_depth != XLNX_PARAM_UNKNOWN)
+ dev_info(dev, "bit_depth = %d\n", bit_depth);
+ else
+ dev_info(dev, "bit_depth = unknown\n");
+}
+
+static int xlnx_formatter_pcm_reset(void __iomem *mmio_base)
+{
+ u32 val, retries = 0;
+
+ val = readl(mmio_base + XLNX_AUD_CTRL);
+ val |= AUD_CTRL_RESET_MASK;
+ writel(val, mmio_base + XLNX_AUD_CTRL);
+
+ val = readl(mmio_base + XLNX_AUD_CTRL);
+ /* Poll for maximum timeout of approximately 100ms (1 * 100)*/
+ while ((val & AUD_CTRL_RESET_MASK) && (retries < 100)) {
+ mdelay(1);
+ retries++;
+ val = readl(mmio_base + XLNX_AUD_CTRL);
+ }
+ if (val & AUD_CTRL_RESET_MASK)
+ return -ENODEV;
+
+ return 0;
+}
+
+static void xlnx_formatter_disable_irqs(void __iomem *mmio_base, int stream)
+{
+ u32 val;
+
+ val = readl(mmio_base + XLNX_AUD_CTRL);
+ val &= ~AUD_CTRL_IOC_IRQ_MASK;
+ if (stream == SNDRV_PCM_STREAM_CAPTURE)
+ val &= ~AUD_CTRL_TOUT_IRQ_MASK;
+
+ writel(val, mmio_base + XLNX_AUD_CTRL);
+}
+
+static irqreturn_t xlnx_mm2s_irq_handler(int irq, void *arg)
+{
+ u32 val;
+ void __iomem *reg;
+ struct device *dev = arg;
+ struct xlnx_pcm_drv_data *adata = dev_get_drvdata(dev);
+
+ reg = adata->mmio + XLNX_MM2S_OFFSET + XLNX_AUD_STS;
+ val = readl(reg);
+ if (val & AUD_STS_IOC_IRQ_MASK) {
+ writel(val & AUD_STS_IOC_IRQ_MASK, reg);
+ if (adata->play_stream)
+ snd_pcm_period_elapsed(adata->play_stream);
+ return IRQ_HANDLED;
+ }
+
+ return IRQ_NONE;
+}
+
+static irqreturn_t xlnx_s2mm_irq_handler(int irq, void *arg)
+{
+ u32 val;
+ void __iomem *reg;
+ struct device *dev = arg;
+ struct xlnx_pcm_drv_data *adata = dev_get_drvdata(dev);
+
+ reg = adata->mmio + XLNX_S2MM_OFFSET + XLNX_AUD_STS;
+ val = readl(reg);
+ if (val & AUD_STS_IOC_IRQ_MASK) {
+ writel(val & AUD_STS_IOC_IRQ_MASK, reg);
+ if (adata->capture_stream)
+ snd_pcm_period_elapsed(adata->capture_stream);
+ return IRQ_HANDLED;
+ }
+
+ return IRQ_NONE;
+}
+
+static int xlnx_formatter_set_sysclk(struct snd_soc_component *component,
+ int clk_id, int source, unsigned int freq, int dir)
+{
+ struct xlnx_pcm_drv_data *adata = dev_get_drvdata(component->dev);
+
+ adata->sysclk = freq;
+ return 0;
+}
+
+static int xlnx_formatter_pcm_open(struct snd_soc_component *component,
+ struct snd_pcm_substream *substream)
+{
+ int err;
+ u32 val, data_format_mode;
+ u32 ch_count_mask, ch_count_shift, data_xfer_mode, data_xfer_shift;
+ struct xlnx_pcm_stream_param *stream_data;
+ struct snd_pcm_runtime *runtime = substream->runtime;
+ struct xlnx_pcm_drv_data *adata = dev_get_drvdata(component->dev);
+
+ if (substream->stream == SNDRV_PCM_STREAM_PLAYBACK &&
+ !adata->mm2s_presence)
+ return -ENODEV;
+ else if (substream->stream == SNDRV_PCM_STREAM_CAPTURE &&
+ !adata->s2mm_presence)
+ return -ENODEV;
+
+ stream_data = kzalloc(sizeof(*stream_data), GFP_KERNEL);
+ if (!stream_data)
+ return -ENOMEM;
+
+ if (substream->stream == SNDRV_PCM_STREAM_PLAYBACK) {
+ ch_count_mask = CFG_MM2S_CH_MASK;
+ ch_count_shift = CFG_MM2S_CH_SHIFT;
+ data_xfer_mode = CFG_MM2S_XFER_MASK;
+ data_xfer_shift = CFG_MM2S_XFER_SHIFT;
+ data_format_mode = CFG_MM2S_PKG_MASK;
+ stream_data->mmio = adata->mmio + XLNX_MM2S_OFFSET;
+ adata->play_stream = substream;
+
+ } else {
+ ch_count_mask = CFG_S2MM_CH_MASK;
+ ch_count_shift = CFG_S2MM_CH_SHIFT;
+ data_xfer_mode = CFG_S2MM_XFER_MASK;
+ data_xfer_shift = CFG_S2MM_XFER_SHIFT;
+ data_format_mode = CFG_S2MM_PKG_MASK;
+ stream_data->mmio = adata->mmio + XLNX_S2MM_OFFSET;
+ adata->capture_stream = substream;
+ }
+
+ val = readl(adata->mmio + XLNX_AUD_CORE_CONFIG);
+
+ if (!(val & data_format_mode))
+ stream_data->interleaved = true;
+
+ stream_data->xfer_mode = (val & data_xfer_mode) >> data_xfer_shift;
+ stream_data->ch_limit = (val & ch_count_mask) >> ch_count_shift;
+ dev_info(component->dev,
+ "stream %d : format = %d mode = %d ch_limit = %d\n",
+ substream->stream, stream_data->interleaved,
+ stream_data->xfer_mode, stream_data->ch_limit);
+
+ snd_soc_set_runtime_hwparams(substream, &xlnx_pcm_hardware);
+ runtime->private_data = stream_data;
+
+ /* Resize the period bytes as divisible by 64 */
+ err = snd_pcm_hw_constraint_step(runtime, 0,
+ SNDRV_PCM_HW_PARAM_PERIOD_BYTES,
+ XLNX_AUD_ALIGN_BYTES);
+ if (err) {
+ dev_err(component->dev,
+ "Unable to set constraint on period bytes\n");
+ return err;
+ }
+
+ /* Resize the buffer bytes as divisible by 64 */
+ err = snd_pcm_hw_constraint_step(runtime, 0,
+ SNDRV_PCM_HW_PARAM_BUFFER_BYTES,
+ XLNX_AUD_ALIGN_BYTES);
+ if (err) {
+ dev_err(component->dev,
+ "Unable to set constraint on buffer bytes\n");
+ return err;
+ }
+
+ /* Set periods as integer multiple */
+ err = snd_pcm_hw_constraint_integer(runtime,
+ SNDRV_PCM_HW_PARAM_PERIODS);
+ if (err < 0) {
+ dev_err(component->dev,
+ "Unable to set constraint on periods to be integer\n");
+ return err;
+ }
+
+ /* enable DMA IOC irq */
+ val = readl(stream_data->mmio + XLNX_AUD_CTRL);
+ val |= AUD_CTRL_IOC_IRQ_MASK;
+ writel(val, stream_data->mmio + XLNX_AUD_CTRL);
+
+ return 0;
+}
+
+static int xlnx_formatter_pcm_close(struct snd_soc_component *component,
+ struct snd_pcm_substream *substream)
+{
+ int ret;
+ struct xlnx_pcm_stream_param *stream_data =
+ substream->runtime->private_data;
+
+ ret = xlnx_formatter_pcm_reset(stream_data->mmio);
+ if (ret) {
+ dev_err(component->dev, "audio formatter reset failed\n");
+ goto err_reset;
+ }
+ xlnx_formatter_disable_irqs(stream_data->mmio, substream->stream);
+
+err_reset:
+ kfree(stream_data);
+ return 0;
+}
+
+static snd_pcm_uframes_t
+xlnx_formatter_pcm_pointer(struct snd_soc_component *component,
+ struct snd_pcm_substream *substream)
+{
+ u32 pos;
+ struct snd_pcm_runtime *runtime = substream->runtime;
+ struct xlnx_pcm_stream_param *stream_data = runtime->private_data;
+
+ pos = readl(stream_data->mmio + XLNX_AUD_XFER_COUNT);
+
+ if (pos >= stream_data->buffer_size)
+ pos = 0;
+
+ return bytes_to_frames(runtime, pos);
+}
+
+static int xlnx_formatter_pcm_hw_params(struct snd_soc_component *component,
+ struct snd_pcm_substream *substream,
+ struct snd_pcm_hw_params *params)
+{
+ u32 low, high, active_ch, val, bytes_per_ch, bits_per_sample;
+ u32 aes_reg1_val, aes_reg2_val;
+ u64 size;
+ struct snd_pcm_runtime *runtime = substream->runtime;
+ struct xlnx_pcm_stream_param *stream_data = runtime->private_data;
+ struct xlnx_pcm_drv_data *adata = dev_get_drvdata(component->dev);
+
+ active_ch = params_channels(params);
+ if (active_ch > stream_data->ch_limit)
+ return -EINVAL;
+
+ if (substream->stream == SNDRV_PCM_STREAM_PLAYBACK &&
+ adata->sysclk) {
+ unsigned int mclk_fs = adata->sysclk / params_rate(params);
+
+ if (adata->sysclk % params_rate(params) != 0) {
+ dev_warn(component->dev, "sysclk %u not divisible by rate %u\n",
+ adata->sysclk, params_rate(params));
+ return -EINVAL;
+ }
+
+ writel(mclk_fs, stream_data->mmio + XLNX_AUD_FS_MULTIPLIER);
+ }
+
+ if (substream->stream == SNDRV_PCM_STREAM_CAPTURE &&
+ stream_data->xfer_mode == AES_TO_PCM) {
+ val = readl(stream_data->mmio + XLNX_AUD_STS);
+ if (val & AUD_STS_CH_STS_MASK) {
+ aes_reg1_val = readl(stream_data->mmio +
+ XLNX_AUD_CH_STS_START);
+ aes_reg2_val = readl(stream_data->mmio +
+ XLNX_AUD_CH_STS_START + 0x4);
+
+ xlnx_parse_aes_params(aes_reg1_val, aes_reg2_val,
+ component->dev);
+ }
+ }
+
+ size = params_buffer_bytes(params);
+
+ stream_data->buffer_size = size;
+
+ low = lower_32_bits(runtime->dma_addr);
+ high = upper_32_bits(runtime->dma_addr);
+ writel(low, stream_data->mmio + XLNX_AUD_BUFF_ADDR_LSB);
+ writel(high, stream_data->mmio + XLNX_AUD_BUFF_ADDR_MSB);
+
+ val = readl(stream_data->mmio + XLNX_AUD_CTRL);
+ bits_per_sample = params_width(params);
+ switch (bits_per_sample) {
+ case 8:
+ val |= (BIT_DEPTH_8 << AUD_CTRL_DATA_WIDTH_SHIFT);
+ break;
+ case 16:
+ val |= (BIT_DEPTH_16 << AUD_CTRL_DATA_WIDTH_SHIFT);
+ break;
+ case 20:
+ val |= (BIT_DEPTH_20 << AUD_CTRL_DATA_WIDTH_SHIFT);
+ break;
+ case 24:
+ val |= (BIT_DEPTH_24 << AUD_CTRL_DATA_WIDTH_SHIFT);
+ break;
+ case 32:
+ val |= (BIT_DEPTH_32 << AUD_CTRL_DATA_WIDTH_SHIFT);
+ break;
+ default:
+ return -EINVAL;
+ }
+
+ val |= active_ch << AUD_CTRL_ACTIVE_CH_SHIFT;
+ writel(val, stream_data->mmio + XLNX_AUD_CTRL);
+
+ val = (params_periods(params) << PERIOD_CFG_PERIODS_SHIFT)
+ | params_period_bytes(params);
+ writel(val, stream_data->mmio + XLNX_AUD_PERIOD_CONFIG);
+ bytes_per_ch = DIV_ROUND_UP(params_period_bytes(params), active_ch);
+ writel(bytes_per_ch, stream_data->mmio + XLNX_BYTES_PER_CH);
+
+ return 0;
+}
+
+static int xlnx_formatter_pcm_trigger(struct snd_soc_component *component,
+ struct snd_pcm_substream *substream,
+ int cmd)
+{
+ u32 val;
+ struct xlnx_pcm_stream_param *stream_data =
+ substream->runtime->private_data;
+
+ switch (cmd) {
+ case SNDRV_PCM_TRIGGER_START:
+ case SNDRV_PCM_TRIGGER_PAUSE_RELEASE:
+ case SNDRV_PCM_TRIGGER_RESUME:
+ val = readl(stream_data->mmio + XLNX_AUD_CTRL);
+ val |= AUD_CTRL_DMA_EN_MASK;
+ writel(val, stream_data->mmio + XLNX_AUD_CTRL);
+ break;
+ case SNDRV_PCM_TRIGGER_STOP:
+ case SNDRV_PCM_TRIGGER_PAUSE_PUSH:
+ case SNDRV_PCM_TRIGGER_SUSPEND:
+ val = readl(stream_data->mmio + XLNX_AUD_CTRL);
+ val &= ~AUD_CTRL_DMA_EN_MASK;
+ writel(val, stream_data->mmio + XLNX_AUD_CTRL);
+ break;
+ }
+
+ return 0;
+}
+
+static int xlnx_formatter_pcm_new(struct snd_soc_component *component,
+ struct snd_soc_pcm_runtime *rtd)
+{
+ snd_pcm_set_managed_buffer_all(rtd->pcm,
+ SNDRV_DMA_TYPE_DEV, component->dev,
+ xlnx_pcm_hardware.buffer_bytes_max,
+ xlnx_pcm_hardware.buffer_bytes_max);
+ return 0;
+}
+
+static const struct snd_soc_component_driver xlnx_asoc_component = {
+ .name = DRV_NAME,
+ .set_sysclk = xlnx_formatter_set_sysclk,
+ .open = xlnx_formatter_pcm_open,
+ .close = xlnx_formatter_pcm_close,
+ .hw_params = xlnx_formatter_pcm_hw_params,
+ .trigger = xlnx_formatter_pcm_trigger,
+ .pointer = xlnx_formatter_pcm_pointer,
+ .pcm_construct = xlnx_formatter_pcm_new,
+};
+
+static int xlnx_formatter_pcm_probe(struct platform_device *pdev)
+{
+ int ret;
+ u32 val;
+ struct xlnx_pcm_drv_data *aud_drv_data;
+ struct device *dev = &pdev->dev;
+
+ aud_drv_data = devm_kzalloc(dev, sizeof(*aud_drv_data), GFP_KERNEL);
+ if (!aud_drv_data)
+ return -ENOMEM;
+
+ aud_drv_data->axi_clk = devm_clk_get(dev, "s_axi_lite_aclk");
+ if (IS_ERR(aud_drv_data->axi_clk)) {
+ ret = PTR_ERR(aud_drv_data->axi_clk);
+ dev_err(dev, "failed to get s_axi_lite_aclk(%d)\n", ret);
+ return ret;
+ }
+ ret = clk_prepare_enable(aud_drv_data->axi_clk);
+ if (ret) {
+ dev_err(dev,
+ "failed to enable s_axi_lite_aclk(%d)\n", ret);
+ return ret;
+ }
+
+ aud_drv_data->mmio = devm_platform_ioremap_resource(pdev, 0);
+ if (IS_ERR(aud_drv_data->mmio)) {
+ dev_err(dev, "audio formatter ioremap failed\n");
+ ret = PTR_ERR(aud_drv_data->mmio);
+ goto clk_err;
+ }
+
+ val = readl(aud_drv_data->mmio + XLNX_AUD_CORE_CONFIG);
+ if (val & AUD_CFG_MM2S_MASK) {
+ aud_drv_data->mm2s_presence = true;
+ ret = xlnx_formatter_pcm_reset(aud_drv_data->mmio +
+ XLNX_MM2S_OFFSET);
+ if (ret) {
+ dev_err(dev, "audio formatter reset failed\n");
+ goto clk_err;
+ }
+ xlnx_formatter_disable_irqs(aud_drv_data->mmio +
+ XLNX_MM2S_OFFSET,
+ SNDRV_PCM_STREAM_PLAYBACK);
+
+ aud_drv_data->mm2s_irq = platform_get_irq_byname(pdev,
+ "irq_mm2s");
+ if (aud_drv_data->mm2s_irq < 0) {
+ ret = aud_drv_data->mm2s_irq;
+ goto clk_err;
+ }
+ ret = devm_request_irq(dev, aud_drv_data->mm2s_irq,
+ xlnx_mm2s_irq_handler, 0,
+ "xlnx_formatter_pcm_mm2s_irq", dev);
+ if (ret) {
+ dev_err(dev, "xlnx audio mm2s irq request failed\n");
+ goto clk_err;
+ }
+ }
+ if (val & AUD_CFG_S2MM_MASK) {
+ aud_drv_data->s2mm_presence = true;
+ ret = xlnx_formatter_pcm_reset(aud_drv_data->mmio +
+ XLNX_S2MM_OFFSET);
+ if (ret) {
+ dev_err(dev, "audio formatter reset failed\n");
+ goto clk_err;
+ }
+ xlnx_formatter_disable_irqs(aud_drv_data->mmio +
+ XLNX_S2MM_OFFSET,
+ SNDRV_PCM_STREAM_CAPTURE);
+
+ aud_drv_data->s2mm_irq = platform_get_irq_byname(pdev,
+ "irq_s2mm");
+ if (aud_drv_data->s2mm_irq < 0) {
+ ret = aud_drv_data->s2mm_irq;
+ goto clk_err;
+ }
+ ret = devm_request_irq(dev, aud_drv_data->s2mm_irq,
+ xlnx_s2mm_irq_handler, 0,
+ "xlnx_formatter_pcm_s2mm_irq",
+ dev);
+ if (ret) {
+ dev_err(dev, "xlnx audio s2mm irq request failed\n");
+ goto clk_err;
+ }
+ }
+
+ dev_set_drvdata(dev, aud_drv_data);
+
+ ret = devm_snd_soc_register_component(dev, &xlnx_asoc_component,
+ NULL, 0);
+ if (ret) {
+ dev_err(dev, "pcm platform device register failed\n");
+ goto clk_err;
+ }
+
+ return 0;
+
+clk_err:
+ clk_disable_unprepare(aud_drv_data->axi_clk);
+ return ret;
+}
+
+static int xlnx_formatter_pcm_remove(struct platform_device *pdev)
+{
+ int ret = 0;
+ struct xlnx_pcm_drv_data *adata = dev_get_drvdata(&pdev->dev);
+
+ if (adata->s2mm_presence)
+ ret = xlnx_formatter_pcm_reset(adata->mmio + XLNX_S2MM_OFFSET);
+
+ /* Try MM2S reset, even if S2MM reset fails */
+ if (adata->mm2s_presence)
+ ret = xlnx_formatter_pcm_reset(adata->mmio + XLNX_MM2S_OFFSET);
+
+ if (ret)
+ dev_err(&pdev->dev, "audio formatter reset failed\n");
+
+ clk_disable_unprepare(adata->axi_clk);
+ return 0;
+}
+
+static const struct of_device_id xlnx_formatter_pcm_of_match[] = {
+ { .compatible = "xlnx,audio-formatter-1.0"},
+ {},
+};
+MODULE_DEVICE_TABLE(of, xlnx_formatter_pcm_of_match);
+
+static struct platform_driver xlnx_formatter_pcm_driver = {
+ .probe = xlnx_formatter_pcm_probe,
+ .remove = xlnx_formatter_pcm_remove,
+ .driver = {
+ .name = DRV_NAME,
+ .of_match_table = xlnx_formatter_pcm_of_match,
+ },
+};
+
+module_platform_driver(xlnx_formatter_pcm_driver);
+MODULE_AUTHOR("Maruthi Srinivas Bayyavarapu <maruthis@xilinx.com>");
+MODULE_LICENSE("GPL v2");
diff --git a/sound/soc/xilinx/xlnx_i2s.c b/sound/soc/xilinx/xlnx_i2s.c
new file mode 100644
index 000000000..9de92d35e
--- /dev/null
+++ b/sound/soc/xilinx/xlnx_i2s.c
@@ -0,0 +1,258 @@
+// SPDX-License-Identifier: GPL-2.0
+//
+// Xilinx ASoC I2S audio support
+//
+// Copyright (C) 2018 Xilinx, Inc.
+//
+// Author: Praveen Vuppala <praveenv@xilinx.com>
+// Author: Maruthi Srinivas Bayyavarapu <maruthis@xilinx.com>
+
+#include <linux/io.h>
+#include <linux/module.h>
+#include <linux/of.h>
+#include <linux/of_platform.h>
+#include <linux/platform_device.h>
+#include <sound/pcm_params.h>
+#include <sound/soc.h>
+
+#define DRV_NAME "xlnx_i2s"
+
+#define I2S_CORE_CTRL_OFFSET 0x08
+#define I2S_CORE_CTRL_32BIT_LRCLK BIT(3)
+#define I2S_CORE_CTRL_ENABLE BIT(0)
+#define I2S_I2STIM_OFFSET 0x20
+#define I2S_CH0_OFFSET 0x30
+#define I2S_I2STIM_VALID_MASK GENMASK(7, 0)
+
+struct xlnx_i2s_drv_data {
+ struct snd_soc_dai_driver dai_drv;
+ void __iomem *base;
+ unsigned int sysclk;
+ u32 data_width;
+ u32 channels;
+ bool is_32bit_lrclk;
+ struct snd_ratnum ratnum;
+ struct snd_pcm_hw_constraint_ratnums rate_constraints;
+};
+
+static int xlnx_i2s_set_sclkout_div(struct snd_soc_dai *cpu_dai,
+ int div_id, int div)
+{
+ struct xlnx_i2s_drv_data *drv_data = snd_soc_dai_get_drvdata(cpu_dai);
+
+ if (!div || (div & ~I2S_I2STIM_VALID_MASK))
+ return -EINVAL;
+
+ drv_data->sysclk = 0;
+
+ writel(div, drv_data->base + I2S_I2STIM_OFFSET);
+
+ return 0;
+}
+
+static int xlnx_i2s_set_sysclk(struct snd_soc_dai *dai,
+ int clk_id, unsigned int freq, int dir)
+{
+ struct xlnx_i2s_drv_data *drv_data = snd_soc_dai_get_drvdata(dai);
+
+ drv_data->sysclk = freq;
+ if (freq) {
+ unsigned int bits_per_sample;
+
+ if (drv_data->is_32bit_lrclk)
+ bits_per_sample = 32;
+ else
+ bits_per_sample = drv_data->data_width;
+
+ drv_data->ratnum.num = freq / (bits_per_sample * drv_data->channels) / 2;
+ drv_data->ratnum.den_step = 1;
+ drv_data->ratnum.den_min = 1;
+ drv_data->ratnum.den_max = 255;
+ drv_data->rate_constraints.rats = &drv_data->ratnum;
+ drv_data->rate_constraints.nrats = 1;
+ }
+ return 0;
+}
+
+static int xlnx_i2s_startup(struct snd_pcm_substream *substream,
+ struct snd_soc_dai *dai)
+{
+ struct xlnx_i2s_drv_data *drv_data = snd_soc_dai_get_drvdata(dai);
+
+ if (drv_data->sysclk)
+ return snd_pcm_hw_constraint_ratnums(substream->runtime, 0,
+ SNDRV_PCM_HW_PARAM_RATE,
+ &drv_data->rate_constraints);
+
+ return 0;
+}
+
+static int xlnx_i2s_hw_params(struct snd_pcm_substream *substream,
+ struct snd_pcm_hw_params *params,
+ struct snd_soc_dai *i2s_dai)
+{
+ u32 reg_off, chan_id;
+ struct xlnx_i2s_drv_data *drv_data = snd_soc_dai_get_drvdata(i2s_dai);
+
+ if (drv_data->sysclk) {
+ unsigned int bits_per_sample, sclk, sclk_div;
+
+ if (drv_data->is_32bit_lrclk)
+ bits_per_sample = 32;
+ else
+ bits_per_sample = drv_data->data_width;
+
+ sclk = params_rate(params) * bits_per_sample * params_channels(params);
+ sclk_div = drv_data->sysclk / sclk / 2;
+
+ if ((drv_data->sysclk % sclk != 0) ||
+ !sclk_div || (sclk_div & ~I2S_I2STIM_VALID_MASK)) {
+ dev_warn(i2s_dai->dev, "invalid SCLK divisor for sysclk %u and sclk %u\n",
+ drv_data->sysclk, sclk);
+ return -EINVAL;
+ }
+ writel(sclk_div, drv_data->base + I2S_I2STIM_OFFSET);
+ }
+
+ chan_id = params_channels(params) / 2;
+
+ while (chan_id > 0) {
+ reg_off = I2S_CH0_OFFSET + ((chan_id - 1) * 4);
+ writel(chan_id, drv_data->base + reg_off);
+ chan_id--;
+ }
+
+ return 0;
+}
+
+static int xlnx_i2s_trigger(struct snd_pcm_substream *substream, int cmd,
+ struct snd_soc_dai *i2s_dai)
+{
+ struct xlnx_i2s_drv_data *drv_data = snd_soc_dai_get_drvdata(i2s_dai);
+
+ switch (cmd) {
+ case SNDRV_PCM_TRIGGER_START:
+ case SNDRV_PCM_TRIGGER_RESUME:
+ case SNDRV_PCM_TRIGGER_PAUSE_RELEASE:
+ writel(I2S_CORE_CTRL_ENABLE, drv_data->base + I2S_CORE_CTRL_OFFSET);
+ break;
+ case SNDRV_PCM_TRIGGER_STOP:
+ case SNDRV_PCM_TRIGGER_SUSPEND:
+ case SNDRV_PCM_TRIGGER_PAUSE_PUSH:
+ writel(0, drv_data->base + I2S_CORE_CTRL_OFFSET);
+ break;
+ default:
+ return -EINVAL;
+ }
+
+ return 0;
+}
+
+static const struct snd_soc_dai_ops xlnx_i2s_dai_ops = {
+ .trigger = xlnx_i2s_trigger,
+ .set_sysclk = xlnx_i2s_set_sysclk,
+ .set_clkdiv = xlnx_i2s_set_sclkout_div,
+ .startup = xlnx_i2s_startup,
+ .hw_params = xlnx_i2s_hw_params
+};
+
+static const struct snd_soc_component_driver xlnx_i2s_component = {
+ .name = DRV_NAME,
+ .legacy_dai_naming = 1,
+};
+
+static const struct of_device_id xlnx_i2s_of_match[] = {
+ { .compatible = "xlnx,i2s-transmitter-1.0", },
+ { .compatible = "xlnx,i2s-receiver-1.0", },
+ {},
+};
+MODULE_DEVICE_TABLE(of, xlnx_i2s_of_match);
+
+static int xlnx_i2s_probe(struct platform_device *pdev)
+{
+ struct xlnx_i2s_drv_data *drv_data;
+ int ret;
+ u32 format;
+ struct device *dev = &pdev->dev;
+ struct device_node *node = dev->of_node;
+
+ drv_data = devm_kzalloc(&pdev->dev, sizeof(*drv_data), GFP_KERNEL);
+ if (!drv_data)
+ return -ENOMEM;
+
+ drv_data->base = devm_platform_ioremap_resource(pdev, 0);
+ if (IS_ERR(drv_data->base))
+ return PTR_ERR(drv_data->base);
+
+ ret = of_property_read_u32(node, "xlnx,num-channels", &drv_data->channels);
+ if (ret < 0) {
+ dev_err(dev, "cannot get supported channels\n");
+ return ret;
+ }
+ drv_data->channels *= 2;
+
+ ret = of_property_read_u32(node, "xlnx,dwidth", &drv_data->data_width);
+ if (ret < 0) {
+ dev_err(dev, "cannot get data width\n");
+ return ret;
+ }
+ switch (drv_data->data_width) {
+ case 16:
+ format = SNDRV_PCM_FMTBIT_S16_LE;
+ break;
+ case 24:
+ format = SNDRV_PCM_FMTBIT_S24_LE;
+ break;
+ default:
+ return -EINVAL;
+ }
+
+ if (of_device_is_compatible(node, "xlnx,i2s-transmitter-1.0")) {
+ drv_data->dai_drv.name = "xlnx_i2s_playback";
+ drv_data->dai_drv.playback.stream_name = "Playback";
+ drv_data->dai_drv.playback.formats = format;
+ drv_data->dai_drv.playback.channels_min = drv_data->channels;
+ drv_data->dai_drv.playback.channels_max = drv_data->channels;
+ drv_data->dai_drv.playback.rates = SNDRV_PCM_RATE_8000_192000;
+ drv_data->dai_drv.ops = &xlnx_i2s_dai_ops;
+ } else if (of_device_is_compatible(node, "xlnx,i2s-receiver-1.0")) {
+ drv_data->dai_drv.name = "xlnx_i2s_capture";
+ drv_data->dai_drv.capture.stream_name = "Capture";
+ drv_data->dai_drv.capture.formats = format;
+ drv_data->dai_drv.capture.channels_min = drv_data->channels;
+ drv_data->dai_drv.capture.channels_max = drv_data->channels;
+ drv_data->dai_drv.capture.rates = SNDRV_PCM_RATE_8000_192000;
+ drv_data->dai_drv.ops = &xlnx_i2s_dai_ops;
+ } else {
+ return -ENODEV;
+ }
+ drv_data->is_32bit_lrclk = readl(drv_data->base + I2S_CORE_CTRL_OFFSET) &
+ I2S_CORE_CTRL_32BIT_LRCLK;
+
+ dev_set_drvdata(&pdev->dev, drv_data);
+
+ ret = devm_snd_soc_register_component(&pdev->dev, &xlnx_i2s_component,
+ &drv_data->dai_drv, 1);
+ if (ret) {
+ dev_err(&pdev->dev, "i2s component registration failed\n");
+ return ret;
+ }
+
+ dev_info(&pdev->dev, "%s DAI registered\n", drv_data->dai_drv.name);
+
+ return ret;
+}
+
+static struct platform_driver xlnx_i2s_aud_driver = {
+ .driver = {
+ .name = DRV_NAME,
+ .of_match_table = xlnx_i2s_of_match,
+ },
+ .probe = xlnx_i2s_probe,
+};
+
+module_platform_driver(xlnx_i2s_aud_driver);
+
+MODULE_LICENSE("GPL v2");
+MODULE_AUTHOR("Praveen Vuppala <praveenv@xilinx.com>");
+MODULE_AUTHOR("Maruthi Srinivas Bayyavarapu <maruthis@xilinx.com>");
diff --git a/sound/soc/xilinx/xlnx_spdif.c b/sound/soc/xilinx/xlnx_spdif.c
new file mode 100644
index 000000000..7342048e9
--- /dev/null
+++ b/sound/soc/xilinx/xlnx_spdif.c
@@ -0,0 +1,335 @@
+// SPDX-License-Identifier: GPL-2.0
+//
+// Xilinx ASoC SPDIF audio support
+//
+// Copyright (C) 2018 Xilinx, Inc.
+//
+// Author: Maruthi Srinivas Bayyavarapu <maruthis@xilinx.com>
+//
+
+#include <linux/clk.h>
+#include <linux/io.h>
+#include <linux/module.h>
+#include <linux/of.h>
+#include <linux/of_platform.h>
+#include <linux/platform_device.h>
+#include <sound/pcm_params.h>
+#include <sound/soc.h>
+
+#define XLNX_SPDIF_RATES \
+ (SNDRV_PCM_RATE_32000 | SNDRV_PCM_RATE_44100 | SNDRV_PCM_RATE_48000 | \
+ SNDRV_PCM_RATE_88200 | SNDRV_PCM_RATE_96000 | SNDRV_PCM_RATE_176400 | \
+ SNDRV_PCM_RATE_192000)
+
+#define XLNX_SPDIF_FORMATS (SNDRV_PCM_FMTBIT_S16_LE | SNDRV_PCM_FMTBIT_S24_LE)
+
+#define XSPDIF_IRQ_STS_REG 0x20
+#define XSPDIF_IRQ_ENABLE_REG 0x28
+#define XSPDIF_SOFT_RESET_REG 0x40
+#define XSPDIF_CONTROL_REG 0x44
+#define XSPDIF_CHAN_0_STS_REG 0x4C
+#define XSPDIF_GLOBAL_IRQ_ENABLE_REG 0x1C
+#define XSPDIF_CH_A_USER_DATA_REG_0 0x64
+
+#define XSPDIF_CORE_ENABLE_MASK BIT(0)
+#define XSPDIF_FIFO_FLUSH_MASK BIT(1)
+#define XSPDIF_CH_STS_MASK BIT(5)
+#define XSPDIF_GLOBAL_IRQ_ENABLE BIT(31)
+#define XSPDIF_CLOCK_CONFIG_BITS_MASK GENMASK(5, 2)
+#define XSPDIF_CLOCK_CONFIG_BITS_SHIFT 2
+#define XSPDIF_SOFT_RESET_VALUE 0xA
+
+#define MAX_CHANNELS 2
+#define AES_SAMPLE_WIDTH 32
+#define CH_STATUS_UPDATE_TIMEOUT 40
+
+struct spdif_dev_data {
+ u32 mode;
+ u32 aclk;
+ bool rx_chsts_updated;
+ void __iomem *base;
+ struct clk *axi_clk;
+ wait_queue_head_t chsts_q;
+};
+
+static irqreturn_t xlnx_spdifrx_irq_handler(int irq, void *arg)
+{
+ u32 val;
+ struct spdif_dev_data *ctx = arg;
+
+ val = readl(ctx->base + XSPDIF_IRQ_STS_REG);
+ if (val & XSPDIF_CH_STS_MASK) {
+ writel(val & XSPDIF_CH_STS_MASK,
+ ctx->base + XSPDIF_IRQ_STS_REG);
+ val = readl(ctx->base +
+ XSPDIF_IRQ_ENABLE_REG);
+ writel(val & ~XSPDIF_CH_STS_MASK,
+ ctx->base + XSPDIF_IRQ_ENABLE_REG);
+
+ ctx->rx_chsts_updated = true;
+ wake_up_interruptible(&ctx->chsts_q);
+ return IRQ_HANDLED;
+ }
+
+ return IRQ_NONE;
+}
+
+static int xlnx_spdif_startup(struct snd_pcm_substream *substream,
+ struct snd_soc_dai *dai)
+{
+ u32 val;
+ struct spdif_dev_data *ctx = dev_get_drvdata(dai->dev);
+
+ val = readl(ctx->base + XSPDIF_CONTROL_REG);
+ val |= XSPDIF_FIFO_FLUSH_MASK;
+ writel(val, ctx->base + XSPDIF_CONTROL_REG);
+
+ if (substream->stream == SNDRV_PCM_STREAM_CAPTURE) {
+ writel(XSPDIF_CH_STS_MASK,
+ ctx->base + XSPDIF_IRQ_ENABLE_REG);
+ writel(XSPDIF_GLOBAL_IRQ_ENABLE,
+ ctx->base + XSPDIF_GLOBAL_IRQ_ENABLE_REG);
+ }
+
+ return 0;
+}
+
+static void xlnx_spdif_shutdown(struct snd_pcm_substream *substream,
+ struct snd_soc_dai *dai)
+{
+ struct spdif_dev_data *ctx = dev_get_drvdata(dai->dev);
+
+ writel(XSPDIF_SOFT_RESET_VALUE, ctx->base + XSPDIF_SOFT_RESET_REG);
+}
+
+static int xlnx_spdif_hw_params(struct snd_pcm_substream *substream,
+ struct snd_pcm_hw_params *params,
+ struct snd_soc_dai *dai)
+{
+ u32 val, clk_div, clk_cfg;
+ struct spdif_dev_data *ctx = dev_get_drvdata(dai->dev);
+
+ clk_div = DIV_ROUND_CLOSEST(ctx->aclk, MAX_CHANNELS * AES_SAMPLE_WIDTH *
+ params_rate(params));
+
+ switch (clk_div) {
+ case 4:
+ clk_cfg = 0;
+ break;
+ case 8:
+ clk_cfg = 1;
+ break;
+ case 16:
+ clk_cfg = 2;
+ break;
+ case 24:
+ clk_cfg = 3;
+ break;
+ case 32:
+ clk_cfg = 4;
+ break;
+ case 48:
+ clk_cfg = 5;
+ break;
+ case 64:
+ clk_cfg = 6;
+ break;
+ default:
+ return -EINVAL;
+ }
+
+ val = readl(ctx->base + XSPDIF_CONTROL_REG);
+ val &= ~XSPDIF_CLOCK_CONFIG_BITS_MASK;
+ val |= clk_cfg << XSPDIF_CLOCK_CONFIG_BITS_SHIFT;
+ writel(val, ctx->base + XSPDIF_CONTROL_REG);
+
+ return 0;
+}
+
+static int rx_stream_detect(struct snd_soc_dai *dai)
+{
+ int err;
+ struct spdif_dev_data *ctx = dev_get_drvdata(dai->dev);
+ unsigned long jiffies = msecs_to_jiffies(CH_STATUS_UPDATE_TIMEOUT);
+
+ /* start capture only if stream is detected within 40ms timeout */
+ err = wait_event_interruptible_timeout(ctx->chsts_q,
+ ctx->rx_chsts_updated,
+ jiffies);
+ if (!err) {
+ dev_err(dai->dev, "No streaming audio detected!\n");
+ return -EINVAL;
+ }
+ ctx->rx_chsts_updated = false;
+
+ return 0;
+}
+
+static int xlnx_spdif_trigger(struct snd_pcm_substream *substream, int cmd,
+ struct snd_soc_dai *dai)
+{
+ u32 val;
+ int ret = 0;
+ struct spdif_dev_data *ctx = dev_get_drvdata(dai->dev);
+
+ val = readl(ctx->base + XSPDIF_CONTROL_REG);
+ switch (cmd) {
+ case SNDRV_PCM_TRIGGER_START:
+ case SNDRV_PCM_TRIGGER_RESUME:
+ case SNDRV_PCM_TRIGGER_PAUSE_RELEASE:
+ val |= XSPDIF_CORE_ENABLE_MASK;
+ writel(val, ctx->base + XSPDIF_CONTROL_REG);
+ if (substream->stream == SNDRV_PCM_STREAM_CAPTURE)
+ ret = rx_stream_detect(dai);
+ break;
+ case SNDRV_PCM_TRIGGER_STOP:
+ case SNDRV_PCM_TRIGGER_SUSPEND:
+ case SNDRV_PCM_TRIGGER_PAUSE_PUSH:
+ val &= ~XSPDIF_CORE_ENABLE_MASK;
+ writel(val, ctx->base + XSPDIF_CONTROL_REG);
+ break;
+ default:
+ ret = -EINVAL;
+ }
+
+ return ret;
+}
+
+static const struct snd_soc_dai_ops xlnx_spdif_dai_ops = {
+ .startup = xlnx_spdif_startup,
+ .shutdown = xlnx_spdif_shutdown,
+ .trigger = xlnx_spdif_trigger,
+ .hw_params = xlnx_spdif_hw_params,
+};
+
+static struct snd_soc_dai_driver xlnx_spdif_tx_dai = {
+ .name = "xlnx_spdif_tx",
+ .playback = {
+ .channels_min = 2,
+ .channels_max = 2,
+ .rates = XLNX_SPDIF_RATES,
+ .formats = XLNX_SPDIF_FORMATS,
+ },
+ .ops = &xlnx_spdif_dai_ops,
+};
+
+static struct snd_soc_dai_driver xlnx_spdif_rx_dai = {
+ .name = "xlnx_spdif_rx",
+ .capture = {
+ .channels_min = 2,
+ .channels_max = 2,
+ .rates = XLNX_SPDIF_RATES,
+ .formats = XLNX_SPDIF_FORMATS,
+ },
+ .ops = &xlnx_spdif_dai_ops,
+};
+
+static const struct snd_soc_component_driver xlnx_spdif_component = {
+ .name = "xlnx-spdif",
+ .legacy_dai_naming = 1,
+};
+
+static const struct of_device_id xlnx_spdif_of_match[] = {
+ { .compatible = "xlnx,spdif-2.0", },
+ {},
+};
+MODULE_DEVICE_TABLE(of, xlnx_spdif_of_match);
+
+static int xlnx_spdif_probe(struct platform_device *pdev)
+{
+ int ret;
+ struct snd_soc_dai_driver *dai_drv;
+ struct spdif_dev_data *ctx;
+
+ struct device *dev = &pdev->dev;
+ struct device_node *node = dev->of_node;
+
+ ctx = devm_kzalloc(dev, sizeof(*ctx), GFP_KERNEL);
+ if (!ctx)
+ return -ENOMEM;
+
+ ctx->axi_clk = devm_clk_get(dev, "s_axi_aclk");
+ if (IS_ERR(ctx->axi_clk)) {
+ ret = PTR_ERR(ctx->axi_clk);
+ dev_err(dev, "failed to get s_axi_aclk(%d)\n", ret);
+ return ret;
+ }
+ ret = clk_prepare_enable(ctx->axi_clk);
+ if (ret) {
+ dev_err(dev, "failed to enable s_axi_aclk(%d)\n", ret);
+ return ret;
+ }
+
+ ctx->base = devm_platform_ioremap_resource(pdev, 0);
+ if (IS_ERR(ctx->base)) {
+ ret = PTR_ERR(ctx->base);
+ goto clk_err;
+ }
+ ret = of_property_read_u32(node, "xlnx,spdif-mode", &ctx->mode);
+ if (ret < 0) {
+ dev_err(dev, "cannot get SPDIF mode\n");
+ goto clk_err;
+ }
+ if (ctx->mode) {
+ dai_drv = &xlnx_spdif_tx_dai;
+ } else {
+ ret = platform_get_irq(pdev, 0);
+ if (ret < 0)
+ goto clk_err;
+ ret = devm_request_irq(dev, ret,
+ xlnx_spdifrx_irq_handler,
+ 0, "XLNX_SPDIF_RX", ctx);
+ if (ret) {
+ dev_err(dev, "spdif rx irq request failed\n");
+ ret = -ENODEV;
+ goto clk_err;
+ }
+
+ init_waitqueue_head(&ctx->chsts_q);
+ dai_drv = &xlnx_spdif_rx_dai;
+ }
+
+ ret = of_property_read_u32(node, "xlnx,aud_clk_i", &ctx->aclk);
+ if (ret < 0) {
+ dev_err(dev, "cannot get aud_clk_i value\n");
+ goto clk_err;
+ }
+
+ dev_set_drvdata(dev, ctx);
+
+ ret = devm_snd_soc_register_component(dev, &xlnx_spdif_component,
+ dai_drv, 1);
+ if (ret) {
+ dev_err(dev, "SPDIF component registration failed\n");
+ goto clk_err;
+ }
+
+ writel(XSPDIF_SOFT_RESET_VALUE, ctx->base + XSPDIF_SOFT_RESET_REG);
+ dev_info(dev, "%s DAI registered\n", dai_drv->name);
+
+clk_err:
+ clk_disable_unprepare(ctx->axi_clk);
+ return ret;
+}
+
+static int xlnx_spdif_remove(struct platform_device *pdev)
+{
+ struct spdif_dev_data *ctx = dev_get_drvdata(&pdev->dev);
+
+ clk_disable_unprepare(ctx->axi_clk);
+ return 0;
+}
+
+static struct platform_driver xlnx_spdif_driver = {
+ .driver = {
+ .name = "xlnx-spdif",
+ .of_match_table = xlnx_spdif_of_match,
+ },
+ .probe = xlnx_spdif_probe,
+ .remove = xlnx_spdif_remove,
+};
+module_platform_driver(xlnx_spdif_driver);
+
+MODULE_AUTHOR("Maruthi Srinivas Bayyavarapu <maruthis@xilinx.com>");
+MODULE_DESCRIPTION("XILINX SPDIF driver");
+MODULE_LICENSE("GPL v2");
generated by cgit v1.2.3 (git 2.39.1) at 2024-11-03 18:35:42 +0000