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-rw-r--r--sound/soc/intel/keembay/kmb_platform.c668
1 files changed, 668 insertions, 0 deletions
diff --git a/sound/soc/intel/keembay/kmb_platform.c b/sound/soc/intel/keembay/kmb_platform.c
new file mode 100644
index 000000000000..16f9fc4c663d
--- /dev/null
+++ b/sound/soc/intel/keembay/kmb_platform.c
@@ -0,0 +1,668 @@
+// SPDX-License-Identifier: GPL-2.0-only
+//
+// Copyright (C) 2020 Intel Corporation.
+//
+// Intel KeemBay Platform driver.
+//
+
+#include <linux/clk.h>
+#include <linux/io.h>
+#include <linux/module.h>
+#include <sound/pcm.h>
+#include <sound/pcm_params.h>
+#include <sound/soc.h>
+#include "kmb_platform.h"
+
+#define PERIODS_MIN 2
+#define PERIODS_MAX 48
+#define PERIOD_BYTES_MIN 4096
+#define BUFFER_BYTES_MAX (PERIODS_MAX * PERIOD_BYTES_MIN)
+#define TDM_OPERATION 1
+#define I2S_OPERATION 0
+#define DATA_WIDTH_CONFIG_BIT 6
+#define TDM_CHANNEL_CONFIG_BIT 3
+
+static const struct snd_pcm_hardware kmb_pcm_hardware = {
+ .info = SNDRV_PCM_INFO_INTERLEAVED |
+ SNDRV_PCM_INFO_MMAP |
+ SNDRV_PCM_INFO_MMAP_VALID |
+ SNDRV_PCM_INFO_BATCH |
+ SNDRV_PCM_INFO_BLOCK_TRANSFER,
+ .rates = SNDRV_PCM_RATE_8000 |
+ SNDRV_PCM_RATE_16000 |
+ SNDRV_PCM_RATE_48000,
+ .rate_min = 8000,
+ .rate_max = 48000,
+ .formats = SNDRV_PCM_FMTBIT_S16_LE |
+ SNDRV_PCM_FMTBIT_S24_LE |
+ SNDRV_PCM_FMTBIT_S32_LE,
+ .channels_min = 2,
+ .channels_max = 2,
+ .buffer_bytes_max = BUFFER_BYTES_MAX,
+ .period_bytes_min = PERIOD_BYTES_MIN,
+ .period_bytes_max = BUFFER_BYTES_MAX / PERIODS_MIN,
+ .periods_min = PERIODS_MIN,
+ .periods_max = PERIODS_MAX,
+ .fifo_size = 16,
+};
+
+static unsigned int kmb_pcm_tx_fn(struct kmb_i2s_info *kmb_i2s,
+ struct snd_pcm_runtime *runtime,
+ unsigned int tx_ptr, bool *period_elapsed)
+{
+ unsigned int period_pos = tx_ptr % runtime->period_size;
+ void __iomem *i2s_base = kmb_i2s->i2s_base;
+ void *buf = runtime->dma_area;
+ int i;
+
+ /* KMB i2s uses two separate L/R FIFO */
+ for (i = 0; i < kmb_i2s->fifo_th; i++) {
+ if (kmb_i2s->config.data_width == 16) {
+ writel(((u16(*)[2])buf)[tx_ptr][0], i2s_base + LRBR_LTHR(0));
+ writel(((u16(*)[2])buf)[tx_ptr][1], i2s_base + RRBR_RTHR(0));
+ } else {
+ writel(((u32(*)[2])buf)[tx_ptr][0], i2s_base + LRBR_LTHR(0));
+ writel(((u32(*)[2])buf)[tx_ptr][1], i2s_base + RRBR_RTHR(0));
+ }
+
+ period_pos++;
+
+ if (++tx_ptr >= runtime->buffer_size)
+ tx_ptr = 0;
+ }
+
+ *period_elapsed = period_pos >= runtime->period_size;
+
+ return tx_ptr;
+}
+
+static unsigned int kmb_pcm_rx_fn(struct kmb_i2s_info *kmb_i2s,
+ struct snd_pcm_runtime *runtime,
+ unsigned int rx_ptr, bool *period_elapsed)
+{
+ unsigned int period_pos = rx_ptr % runtime->period_size;
+ void __iomem *i2s_base = kmb_i2s->i2s_base;
+ void *buf = runtime->dma_area;
+ int i;
+
+ /* KMB i2s uses two separate L/R FIFO */
+ for (i = 0; i < kmb_i2s->fifo_th; i++) {
+ if (kmb_i2s->config.data_width == 16) {
+ ((u16(*)[2])buf)[rx_ptr][0] = readl(i2s_base + LRBR_LTHR(0));
+ ((u16(*)[2])buf)[rx_ptr][1] = readl(i2s_base + RRBR_RTHR(0));
+ } else {
+ ((u32(*)[2])buf)[rx_ptr][0] = readl(i2s_base + LRBR_LTHR(0));
+ ((u32(*)[2])buf)[rx_ptr][1] = readl(i2s_base + RRBR_RTHR(0));
+ }
+
+ period_pos++;
+
+ if (++rx_ptr >= runtime->buffer_size)
+ rx_ptr = 0;
+ }
+
+ *period_elapsed = period_pos >= runtime->period_size;
+
+ return rx_ptr;
+}
+
+static inline void kmb_i2s_disable_channels(struct kmb_i2s_info *kmb_i2s,
+ u32 stream)
+{
+ u32 i;
+
+ /* Disable all channels regardless of configuration*/
+ if (stream == SNDRV_PCM_STREAM_PLAYBACK) {
+ for (i = 0; i < MAX_ISR; i++)
+ writel(0, kmb_i2s->i2s_base + TER(i));
+ } else {
+ for (i = 0; i < MAX_ISR; i++)
+ writel(0, kmb_i2s->i2s_base + RER(i));
+ }
+}
+
+static inline void kmb_i2s_clear_irqs(struct kmb_i2s_info *kmb_i2s, u32 stream)
+{
+ struct i2s_clk_config_data *config = &kmb_i2s->config;
+ u32 i;
+
+ if (stream == SNDRV_PCM_STREAM_PLAYBACK) {
+ for (i = 0; i < config->chan_nr / 2; i++)
+ readl(kmb_i2s->i2s_base + TOR(i));
+ } else {
+ for (i = 0; i < config->chan_nr / 2; i++)
+ readl(kmb_i2s->i2s_base + ROR(i));
+ }
+}
+
+static inline void kmb_i2s_irq_trigger(struct kmb_i2s_info *kmb_i2s,
+ u32 stream, int chan_nr, bool trigger)
+{
+ u32 i, irq;
+ u32 flag;
+
+ if (stream == SNDRV_PCM_STREAM_PLAYBACK)
+ flag = TX_INT_FLAG;
+ else
+ flag = RX_INT_FLAG;
+
+ for (i = 0; i < chan_nr / 2; i++) {
+ irq = readl(kmb_i2s->i2s_base + IMR(i));
+
+ if (trigger)
+ irq = irq & ~flag;
+ else
+ irq = irq | flag;
+
+ writel(irq, kmb_i2s->i2s_base + IMR(i));
+ }
+}
+
+static void kmb_pcm_operation(struct kmb_i2s_info *kmb_i2s, bool playback)
+{
+ struct snd_pcm_substream *substream;
+ bool period_elapsed;
+ unsigned int new_ptr;
+ unsigned int ptr;
+
+ if (playback)
+ substream = kmb_i2s->tx_substream;
+ else
+ substream = kmb_i2s->rx_substream;
+
+ if (!substream || !snd_pcm_running(substream))
+ return;
+
+ if (playback) {
+ ptr = kmb_i2s->tx_ptr;
+ new_ptr = kmb_pcm_tx_fn(kmb_i2s, substream->runtime,
+ ptr, &period_elapsed);
+ cmpxchg(&kmb_i2s->tx_ptr, ptr, new_ptr);
+ } else {
+ ptr = kmb_i2s->rx_ptr;
+ new_ptr = kmb_pcm_rx_fn(kmb_i2s, substream->runtime,
+ ptr, &period_elapsed);
+ cmpxchg(&kmb_i2s->rx_ptr, ptr, new_ptr);
+ }
+
+ if (period_elapsed)
+ snd_pcm_period_elapsed(substream);
+}
+
+static int kmb_pcm_open(struct snd_soc_component *component,
+ struct snd_pcm_substream *substream)
+{
+ struct snd_pcm_runtime *runtime = substream->runtime;
+ struct snd_soc_pcm_runtime *rtd = asoc_substream_to_rtd(substream);
+ struct kmb_i2s_info *kmb_i2s;
+
+ kmb_i2s = snd_soc_dai_get_drvdata(asoc_rtd_to_cpu(rtd, 0));
+ snd_soc_set_runtime_hwparams(substream, &kmb_pcm_hardware);
+ snd_pcm_hw_constraint_integer(runtime, SNDRV_PCM_HW_PARAM_PERIODS);
+ runtime->private_data = kmb_i2s;
+
+ return 0;
+}
+
+static int kmb_pcm_trigger(struct snd_soc_component *component,
+ struct snd_pcm_substream *substream, int cmd)
+{
+ struct snd_pcm_runtime *runtime = substream->runtime;
+ struct kmb_i2s_info *kmb_i2s = runtime->private_data;
+
+ switch (cmd) {
+ case SNDRV_PCM_TRIGGER_START:
+ if (substream->stream == SNDRV_PCM_STREAM_PLAYBACK) {
+ kmb_i2s->tx_ptr = 0;
+ kmb_i2s->tx_substream = substream;
+ } else {
+ kmb_i2s->rx_ptr = 0;
+ kmb_i2s->rx_substream = substream;
+ }
+ break;
+ case SNDRV_PCM_TRIGGER_STOP:
+ if (substream->stream == SNDRV_PCM_STREAM_PLAYBACK)
+ kmb_i2s->tx_substream = NULL;
+ else
+ kmb_i2s->rx_substream = NULL;
+ break;
+ default:
+ return -EINVAL;
+ }
+
+ return 0;
+}
+
+static irqreturn_t kmb_i2s_irq_handler(int irq, void *dev_id)
+{
+ struct kmb_i2s_info *kmb_i2s = dev_id;
+ struct i2s_clk_config_data *config = &kmb_i2s->config;
+ irqreturn_t ret = IRQ_NONE;
+ u32 isr[4];
+ int i;
+
+ for (i = 0; i < config->chan_nr / 2; i++)
+ isr[i] = readl(kmb_i2s->i2s_base + ISR(i));
+
+ kmb_i2s_clear_irqs(kmb_i2s, SNDRV_PCM_STREAM_PLAYBACK);
+ kmb_i2s_clear_irqs(kmb_i2s, SNDRV_PCM_STREAM_CAPTURE);
+
+ for (i = 0; i < config->chan_nr / 2; i++) {
+ /*
+ * Check if TX fifo is empty. If empty fill FIFO with samples
+ */
+ if ((isr[i] & ISR_TXFE)) {
+ kmb_pcm_operation(kmb_i2s, true);
+ ret = IRQ_HANDLED;
+ }
+ /*
+ * Data available. Retrieve samples from FIFO
+ */
+ if ((isr[i] & ISR_RXDA)) {
+ kmb_pcm_operation(kmb_i2s, false);
+ ret = IRQ_HANDLED;
+ }
+ /* Error Handling: TX */
+ if (isr[i] & ISR_TXFO) {
+ dev_dbg(kmb_i2s->dev, "TX overrun (ch_id=%d)\n", i);
+ ret = IRQ_HANDLED;
+ }
+ /* Error Handling: RX */
+ if (isr[i] & ISR_RXFO) {
+ dev_dbg(kmb_i2s->dev, "RX overrun (ch_id=%d)\n", i);
+ ret = IRQ_HANDLED;
+ }
+ }
+
+ return ret;
+}
+
+static int kmb_platform_pcm_new(struct snd_soc_component *component,
+ struct snd_soc_pcm_runtime *soc_runtime)
+{
+ size_t size = kmb_pcm_hardware.buffer_bytes_max;
+ /* Use SNDRV_DMA_TYPE_CONTINUOUS as KMB doesn't use PCI sg buffer */
+ snd_pcm_set_managed_buffer_all(soc_runtime->pcm,
+ SNDRV_DMA_TYPE_CONTINUOUS,
+ NULL, size, size);
+ return 0;
+}
+
+static snd_pcm_uframes_t kmb_pcm_pointer(struct snd_soc_component *component,
+ struct snd_pcm_substream *substream)
+{
+ struct snd_pcm_runtime *runtime = substream->runtime;
+ struct kmb_i2s_info *kmb_i2s = runtime->private_data;
+ snd_pcm_uframes_t pos;
+
+ if (substream->stream == SNDRV_PCM_STREAM_PLAYBACK)
+ pos = kmb_i2s->tx_ptr;
+ else
+ pos = kmb_i2s->rx_ptr;
+
+ return pos < runtime->buffer_size ? pos : 0;
+}
+
+static const struct snd_soc_component_driver kmb_component = {
+ .name = "kmb",
+ .pcm_construct = kmb_platform_pcm_new,
+ .open = kmb_pcm_open,
+ .trigger = kmb_pcm_trigger,
+ .pointer = kmb_pcm_pointer,
+};
+
+static void kmb_i2s_start(struct kmb_i2s_info *kmb_i2s,
+ struct snd_pcm_substream *substream)
+{
+ struct i2s_clk_config_data *config = &kmb_i2s->config;
+
+ /* I2S Programming sequence in Keem_Bay_VPU_DB_v1.1 */
+ writel(1, kmb_i2s->i2s_base + IER);
+
+ if (substream->stream == SNDRV_PCM_STREAM_PLAYBACK)
+ writel(1, kmb_i2s->i2s_base + ITER);
+ else
+ writel(1, kmb_i2s->i2s_base + IRER);
+
+ kmb_i2s_irq_trigger(kmb_i2s, substream->stream, config->chan_nr, true);
+
+ if (kmb_i2s->master)
+ writel(1, kmb_i2s->i2s_base + CER);
+ else
+ writel(0, kmb_i2s->i2s_base + CER);
+}
+
+static void kmb_i2s_stop(struct kmb_i2s_info *kmb_i2s,
+ struct snd_pcm_substream *substream)
+{
+ /* I2S Programming sequence in Keem_Bay_VPU_DB_v1.1 */
+ kmb_i2s_clear_irqs(kmb_i2s, substream->stream);
+
+ if (substream->stream == SNDRV_PCM_STREAM_PLAYBACK)
+ writel(0, kmb_i2s->i2s_base + ITER);
+ else
+ writel(0, kmb_i2s->i2s_base + IRER);
+
+ kmb_i2s_irq_trigger(kmb_i2s, substream->stream, 8, false);
+
+ if (!kmb_i2s->active) {
+ writel(0, kmb_i2s->i2s_base + CER);
+ writel(0, kmb_i2s->i2s_base + IER);
+ }
+}
+
+static void kmb_disable_clk(void *clk)
+{
+ clk_disable_unprepare(clk);
+}
+
+static int kmb_set_dai_fmt(struct snd_soc_dai *cpu_dai, unsigned int fmt)
+{
+ struct kmb_i2s_info *kmb_i2s = snd_soc_dai_get_drvdata(cpu_dai);
+ int ret;
+
+ switch (fmt & SND_SOC_DAIFMT_MASTER_MASK) {
+ case SND_SOC_DAIFMT_CBM_CFM:
+ kmb_i2s->master = false;
+ ret = 0;
+ break;
+ case SND_SOC_DAIFMT_CBS_CFS:
+ writel(MASTER_MODE, kmb_i2s->pss_base + I2S_GEN_CFG_0);
+
+ ret = clk_prepare_enable(kmb_i2s->clk_i2s);
+ if (ret < 0)
+ return ret;
+
+ ret = devm_add_action_or_reset(kmb_i2s->dev, kmb_disable_clk,
+ kmb_i2s->clk_i2s);
+ if (ret)
+ return ret;
+
+ kmb_i2s->master = true;
+ break;
+ default:
+ return -EINVAL;
+ }
+
+ return ret;
+}
+
+static int kmb_dai_trigger(struct snd_pcm_substream *substream,
+ int cmd, struct snd_soc_dai *cpu_dai)
+{
+ struct kmb_i2s_info *kmb_i2s = snd_soc_dai_get_drvdata(cpu_dai);
+
+ switch (cmd) {
+ case SNDRV_PCM_TRIGGER_START:
+ /* Keep track of i2s activity before turn off
+ * the i2s interface
+ */
+ kmb_i2s->active++;
+ kmb_i2s_start(kmb_i2s, substream);
+ break;
+ case SNDRV_PCM_TRIGGER_STOP:
+ kmb_i2s->active--;
+ kmb_i2s_stop(kmb_i2s, substream);
+ break;
+ default:
+ return -EINVAL;
+ }
+
+ return 0;
+}
+
+static void kmb_i2s_config(struct kmb_i2s_info *kmb_i2s, int stream)
+{
+ struct i2s_clk_config_data *config = &kmb_i2s->config;
+ u32 ch_reg;
+
+ kmb_i2s_disable_channels(kmb_i2s, stream);
+
+ for (ch_reg = 0; ch_reg < config->chan_nr / 2; ch_reg++) {
+ if (stream == SNDRV_PCM_STREAM_PLAYBACK) {
+ writel(kmb_i2s->xfer_resolution,
+ kmb_i2s->i2s_base + TCR(ch_reg));
+
+ writel(kmb_i2s->fifo_th - 1,
+ kmb_i2s->i2s_base + TFCR(ch_reg));
+
+ writel(1, kmb_i2s->i2s_base + TER(ch_reg));
+ } else {
+ writel(kmb_i2s->xfer_resolution,
+ kmb_i2s->i2s_base + RCR(ch_reg));
+
+ writel(kmb_i2s->fifo_th - 1,
+ kmb_i2s->i2s_base + RFCR(ch_reg));
+
+ writel(1, kmb_i2s->i2s_base + RER(ch_reg));
+ }
+ }
+}
+
+static int kmb_dai_hw_params(struct snd_pcm_substream *substream,
+ struct snd_pcm_hw_params *hw_params,
+ struct snd_soc_dai *cpu_dai)
+{
+ struct kmb_i2s_info *kmb_i2s = snd_soc_dai_get_drvdata(cpu_dai);
+ struct i2s_clk_config_data *config = &kmb_i2s->config;
+ u32 register_val, write_val;
+ int ret;
+
+ switch (params_format(hw_params)) {
+ case SNDRV_PCM_FORMAT_S16_LE:
+ config->data_width = 16;
+ kmb_i2s->ccr = 0x00;
+ kmb_i2s->xfer_resolution = 0x02;
+ break;
+ case SNDRV_PCM_FORMAT_S24_LE:
+ config->data_width = 24;
+ kmb_i2s->ccr = 0x08;
+ kmb_i2s->xfer_resolution = 0x04;
+ break;
+ case SNDRV_PCM_FORMAT_S32_LE:
+ config->data_width = 32;
+ kmb_i2s->ccr = 0x10;
+ kmb_i2s->xfer_resolution = 0x05;
+ break;
+ default:
+ dev_err(kmb_i2s->dev, "kmb: unsupported PCM fmt");
+ return -EINVAL;
+ }
+
+ config->chan_nr = params_channels(hw_params);
+
+ switch (config->chan_nr) {
+ /* TODO: This switch case will handle up to TDM8 in the near future */
+ case TWO_CHANNEL_SUPPORT:
+ write_val = ((config->chan_nr / 2) << TDM_CHANNEL_CONFIG_BIT) |
+ (config->data_width << DATA_WIDTH_CONFIG_BIT) |
+ MASTER_MODE | I2S_OPERATION;
+
+ writel(write_val, kmb_i2s->pss_base + I2S_GEN_CFG_0);
+
+ register_val = readl(kmb_i2s->pss_base + I2S_GEN_CFG_0);
+ dev_dbg(kmb_i2s->dev, "pss register = 0x%X", register_val);
+ break;
+ default:
+ dev_dbg(kmb_i2s->dev, "channel not supported\n");
+ return -EINVAL;
+ }
+
+ kmb_i2s_config(kmb_i2s, substream->stream);
+
+ writel(kmb_i2s->ccr, kmb_i2s->i2s_base + CCR);
+
+ config->sample_rate = params_rate(hw_params);
+
+ if (kmb_i2s->master) {
+ /* Only 2 ch supported in Master mode */
+ u32 bitclk = config->sample_rate * config->data_width * 2;
+
+ ret = clk_set_rate(kmb_i2s->clk_i2s, bitclk);
+ if (ret) {
+ dev_err(kmb_i2s->dev,
+ "Can't set I2S clock rate: %d\n", ret);
+ return ret;
+ }
+ }
+
+ return 0;
+}
+
+static int kmb_dai_prepare(struct snd_pcm_substream *substream,
+ struct snd_soc_dai *cpu_dai)
+{
+ struct kmb_i2s_info *kmb_i2s = snd_soc_dai_get_drvdata(cpu_dai);
+
+ if (substream->stream == SNDRV_PCM_STREAM_PLAYBACK)
+ writel(1, kmb_i2s->i2s_base + TXFFR);
+ else
+ writel(1, kmb_i2s->i2s_base + RXFFR);
+
+ return 0;
+}
+
+static struct snd_soc_dai_ops kmb_dai_ops = {
+ .trigger = kmb_dai_trigger,
+ .hw_params = kmb_dai_hw_params,
+ .prepare = kmb_dai_prepare,
+ .set_fmt = kmb_set_dai_fmt,
+};
+
+static struct snd_soc_dai_driver intel_kmb_platform_dai[] = {
+ {
+ .name = "kmb-plat-dai",
+ .playback = {
+ .channels_min = 2,
+ .channels_max = 2,
+ .rates = SNDRV_PCM_RATE_8000 |
+ SNDRV_PCM_RATE_16000 |
+ SNDRV_PCM_RATE_48000,
+ .rate_min = 8000,
+ .rate_max = 48000,
+ .formats = (SNDRV_PCM_FMTBIT_S32_LE |
+ SNDRV_PCM_FMTBIT_S24_LE |
+ SNDRV_PCM_FMTBIT_S16_LE),
+ },
+ .capture = {
+ .channels_min = 2,
+ .channels_max = 2,
+ /*
+ * .channels_max will be overwritten
+ * if provided by Device Tree
+ */
+ .rates = SNDRV_PCM_RATE_8000 |
+ SNDRV_PCM_RATE_16000 |
+ SNDRV_PCM_RATE_48000,
+ .rate_min = 8000,
+ .rate_max = 48000,
+ .formats = (SNDRV_PCM_FMTBIT_S32_LE |
+ SNDRV_PCM_FMTBIT_S24_LE |
+ SNDRV_PCM_FMTBIT_S16_LE),
+ },
+ .ops = &kmb_dai_ops,
+ },
+};
+
+static int kmb_plat_dai_probe(struct platform_device *pdev)
+{
+ struct snd_soc_dai_driver *kmb_i2s_dai;
+ struct device *dev = &pdev->dev;
+ struct kmb_i2s_info *kmb_i2s;
+ int ret, irq;
+ u32 comp1_reg;
+
+ kmb_i2s = devm_kzalloc(dev, sizeof(*kmb_i2s), GFP_KERNEL);
+ if (!kmb_i2s)
+ return -ENOMEM;
+
+ kmb_i2s_dai = devm_kzalloc(dev, sizeof(*kmb_i2s_dai), GFP_KERNEL);
+ if (!kmb_i2s_dai)
+ return -ENOMEM;
+
+ kmb_i2s_dai->ops = &kmb_dai_ops;
+
+ /* Prepare the related clocks */
+ kmb_i2s->clk_apb = devm_clk_get(dev, "apb_clk");
+ if (IS_ERR(kmb_i2s->clk_apb)) {
+ dev_err(dev, "Failed to get apb clock\n");
+ return PTR_ERR(kmb_i2s->clk_apb);
+ }
+
+ ret = clk_prepare_enable(kmb_i2s->clk_apb);
+ if (ret < 0)
+ return ret;
+
+ ret = devm_add_action_or_reset(dev, kmb_disable_clk, kmb_i2s->clk_apb);
+ if (ret) {
+ dev_err(dev, "Failed to add clk_apb reset action\n");
+ return ret;
+ }
+
+ kmb_i2s->clk_i2s = devm_clk_get(dev, "osc");
+ if (IS_ERR(kmb_i2s->clk_i2s)) {
+ dev_err(dev, "Failed to get osc clock\n");
+ return PTR_ERR(kmb_i2s->clk_i2s);
+ }
+
+ kmb_i2s->i2s_base = devm_platform_ioremap_resource(pdev, 0);
+ if (IS_ERR(kmb_i2s->i2s_base))
+ return PTR_ERR(kmb_i2s->i2s_base);
+
+ kmb_i2s->pss_base = devm_platform_ioremap_resource(pdev, 1);
+ if (IS_ERR(kmb_i2s->pss_base))
+ return PTR_ERR(kmb_i2s->pss_base);
+
+ kmb_i2s->dev = &pdev->dev;
+
+ irq = platform_get_irq_optional(pdev, 0);
+ if (irq > 0) {
+ ret = devm_request_irq(dev, irq, kmb_i2s_irq_handler, 0,
+ pdev->name, kmb_i2s);
+ if (ret < 0) {
+ dev_err(dev, "failed to request irq\n");
+ return ret;
+ }
+ }
+
+ comp1_reg = readl(kmb_i2s->i2s_base + I2S_COMP_PARAM_1);
+
+ kmb_i2s->fifo_th = (1 << COMP1_FIFO_DEPTH(comp1_reg)) / 2;
+
+ ret = devm_snd_soc_register_component(dev, &kmb_component,
+ intel_kmb_platform_dai,
+ ARRAY_SIZE(intel_kmb_platform_dai));
+ if (ret) {
+ dev_err(dev, "not able to register dai\n");
+ return ret;
+ }
+
+ /* To ensure none of the channels are enabled at boot up */
+ kmb_i2s_disable_channels(kmb_i2s, SNDRV_PCM_STREAM_PLAYBACK);
+ kmb_i2s_disable_channels(kmb_i2s, SNDRV_PCM_STREAM_CAPTURE);
+
+ dev_set_drvdata(dev, kmb_i2s);
+
+ return ret;
+}
+
+static const struct of_device_id kmb_plat_of_match[] = {
+ { .compatible = "intel,keembay-i2s", },
+ {}
+};
+
+static struct platform_driver kmb_plat_dai_driver = {
+ .driver = {
+ .name = "kmb-plat-dai",
+ .of_match_table = kmb_plat_of_match,
+ },
+ .probe = kmb_plat_dai_probe,
+};
+
+module_platform_driver(kmb_plat_dai_driver);
+
+MODULE_DESCRIPTION("ASoC Intel KeemBay Platform driver");
+MODULE_AUTHOR("Sia Jee Heng <jee.heng.sia@intel.com>");
+MODULE_AUTHOR("Sit, Michael Wei Hong <michael.wei.hong.sit@intel.com>");
+MODULE_LICENSE("GPL v2");
+MODULE_ALIAS("platform:kmb_platform");
generated by cgit v1.2.3 (git 2.39.1) at 2024-06-11 22:34:00 +0000