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authorDaniel Baumann <daniel.baumann@progress-linux.org>2024-04-11 08:27:49 +0000
committerDaniel Baumann <daniel.baumann@progress-linux.org>2024-04-11 08:27:49 +0000
commitace9429bb58fd418f0c81d4c2835699bddf6bde6 (patch)
treeb2d64bc10158fdd5497876388cd68142ca374ed3 /sound/soc/dwc/dwc-i2s.c
parentInitial commit. (diff)
downloadlinux-ace9429bb58fd418f0c81d4c2835699bddf6bde6.tar.xz
linux-ace9429bb58fd418f0c81d4c2835699bddf6bde6.zip
Adding upstream version 6.6.15.upstream/6.6.15
Signed-off-by: Daniel Baumann <daniel.baumann@progress-linux.org>
Diffstat (limited to 'sound/soc/dwc/dwc-i2s.c')
-rw-r--r--sound/soc/dwc/dwc-i2s.c1115
1 files changed, 1115 insertions, 0 deletions
diff --git a/sound/soc/dwc/dwc-i2s.c b/sound/soc/dwc/dwc-i2s.c
new file mode 100644
index 0000000000..9ea4be56d3
--- /dev/null
+++ b/sound/soc/dwc/dwc-i2s.c
@@ -0,0 +1,1115 @@
+/*
+ * ALSA SoC Synopsys I2S Audio Layer
+ *
+ * sound/soc/dwc/designware_i2s.c
+ *
+ * Copyright (C) 2010 ST Microelectronics
+ * Rajeev Kumar <rajeevkumar.linux@gmail.com>
+ *
+ * This file is licensed under the terms of the GNU General Public
+ * License version 2. This program is licensed "as is" without any
+ * warranty of any kind, whether express or implied.
+ */
+
+#include <linux/clk.h>
+#include <linux/device.h>
+#include <linux/init.h>
+#include <linux/io.h>
+#include <linux/interrupt.h>
+#include <linux/mfd/syscon.h>
+#include <linux/module.h>
+#include <linux/reset.h>
+#include <linux/slab.h>
+#include <linux/pm_runtime.h>
+#include <sound/designware_i2s.h>
+#include <sound/pcm.h>
+#include <sound/pcm_params.h>
+#include <sound/soc.h>
+#include <sound/dmaengine_pcm.h>
+#include "local.h"
+
+static inline void i2s_write_reg(void __iomem *io_base, int reg, u32 val)
+{
+ writel(val, io_base + reg);
+}
+
+static inline u32 i2s_read_reg(void __iomem *io_base, int reg)
+{
+ return readl(io_base + reg);
+}
+
+static inline void i2s_disable_channels(struct dw_i2s_dev *dev, u32 stream)
+{
+ u32 i = 0;
+
+ if (stream == SNDRV_PCM_STREAM_PLAYBACK) {
+ for (i = 0; i < 4; i++)
+ i2s_write_reg(dev->i2s_base, TER(i), 0);
+ } else {
+ for (i = 0; i < 4; i++)
+ i2s_write_reg(dev->i2s_base, RER(i), 0);
+ }
+}
+
+static inline void i2s_clear_irqs(struct dw_i2s_dev *dev, u32 stream)
+{
+ u32 i = 0;
+
+ if (stream == SNDRV_PCM_STREAM_PLAYBACK) {
+ for (i = 0; i < 4; i++)
+ i2s_read_reg(dev->i2s_base, TOR(i));
+ } else {
+ for (i = 0; i < 4; i++)
+ i2s_read_reg(dev->i2s_base, ROR(i));
+ }
+}
+
+static inline void i2s_disable_irqs(struct dw_i2s_dev *dev, u32 stream,
+ int chan_nr)
+{
+ u32 i, irq;
+
+ if (stream == SNDRV_PCM_STREAM_PLAYBACK) {
+ for (i = 0; i < (chan_nr / 2); i++) {
+ irq = i2s_read_reg(dev->i2s_base, IMR(i));
+ i2s_write_reg(dev->i2s_base, IMR(i), irq | 0x30);
+ }
+ } else {
+ for (i = 0; i < (chan_nr / 2); i++) {
+ irq = i2s_read_reg(dev->i2s_base, IMR(i));
+ i2s_write_reg(dev->i2s_base, IMR(i), irq | 0x03);
+ }
+ }
+}
+
+static inline void i2s_enable_irqs(struct dw_i2s_dev *dev, u32 stream,
+ int chan_nr)
+{
+ u32 i, irq;
+
+ if (stream == SNDRV_PCM_STREAM_PLAYBACK) {
+ for (i = 0; i < (chan_nr / 2); i++) {
+ irq = i2s_read_reg(dev->i2s_base, IMR(i));
+ i2s_write_reg(dev->i2s_base, IMR(i), irq & ~0x30);
+ }
+ } else {
+ for (i = 0; i < (chan_nr / 2); i++) {
+ irq = i2s_read_reg(dev->i2s_base, IMR(i));
+ i2s_write_reg(dev->i2s_base, IMR(i), irq & ~0x03);
+ }
+ }
+}
+
+static irqreturn_t i2s_irq_handler(int irq, void *dev_id)
+{
+ struct dw_i2s_dev *dev = dev_id;
+ bool irq_valid = false;
+ u32 isr[4];
+ int i;
+
+ for (i = 0; i < 4; i++)
+ isr[i] = i2s_read_reg(dev->i2s_base, ISR(i));
+
+ i2s_clear_irqs(dev, SNDRV_PCM_STREAM_PLAYBACK);
+ i2s_clear_irqs(dev, SNDRV_PCM_STREAM_CAPTURE);
+
+ for (i = 0; i < 4; i++) {
+ /*
+ * Check if TX fifo is empty. If empty fill FIFO with samples
+ * NOTE: Only two channels supported
+ */
+ if ((isr[i] & ISR_TXFE) && (i == 0) && dev->use_pio) {
+ dw_pcm_push_tx(dev);
+ irq_valid = true;
+ }
+
+ /*
+ * Data available. Retrieve samples from FIFO
+ * NOTE: Only two channels supported
+ */
+ if ((isr[i] & ISR_RXDA) && (i == 0) && dev->use_pio) {
+ dw_pcm_pop_rx(dev);
+ irq_valid = true;
+ }
+
+ /* Error Handling: TX */
+ if (isr[i] & ISR_TXFO) {
+ dev_err_ratelimited(dev->dev, "TX overrun (ch_id=%d)\n", i);
+ irq_valid = true;
+ }
+
+ /* Error Handling: TX */
+ if (isr[i] & ISR_RXFO) {
+ dev_err_ratelimited(dev->dev, "RX overrun (ch_id=%d)\n", i);
+ irq_valid = true;
+ }
+ }
+
+ if (irq_valid)
+ return IRQ_HANDLED;
+ else
+ return IRQ_NONE;
+}
+
+static void i2s_enable_dma(struct dw_i2s_dev *dev, u32 stream)
+{
+ u32 dma_reg = i2s_read_reg(dev->i2s_base, I2S_DMACR);
+
+ /* Enable DMA handshake for stream */
+ if (stream == SNDRV_PCM_STREAM_PLAYBACK)
+ dma_reg |= I2S_DMAEN_TXBLOCK;
+ else
+ dma_reg |= I2S_DMAEN_RXBLOCK;
+
+ i2s_write_reg(dev->i2s_base, I2S_DMACR, dma_reg);
+}
+
+static void i2s_disable_dma(struct dw_i2s_dev *dev, u32 stream)
+{
+ u32 dma_reg = i2s_read_reg(dev->i2s_base, I2S_DMACR);
+
+ /* Disable DMA handshake for stream */
+ if (stream == SNDRV_PCM_STREAM_PLAYBACK) {
+ dma_reg &= ~I2S_DMAEN_TXBLOCK;
+ i2s_write_reg(dev->i2s_base, I2S_RTXDMA, 1);
+ } else {
+ dma_reg &= ~I2S_DMAEN_RXBLOCK;
+ i2s_write_reg(dev->i2s_base, I2S_RRXDMA, 1);
+ }
+ i2s_write_reg(dev->i2s_base, I2S_DMACR, dma_reg);
+}
+
+static void i2s_start(struct dw_i2s_dev *dev,
+ struct snd_pcm_substream *substream)
+{
+ struct i2s_clk_config_data *config = &dev->config;
+
+ u32 reg = IER_IEN;
+
+ if (dev->tdm_slots) {
+ reg |= (dev->tdm_slots - 1) << IER_TDM_SLOTS_SHIFT;
+ reg |= IER_INTF_TYPE;
+ reg |= dev->frame_offset << IER_FRAME_OFF_SHIFT;
+ }
+
+ i2s_write_reg(dev->i2s_base, IER, reg);
+
+ if (substream->stream == SNDRV_PCM_STREAM_PLAYBACK)
+ i2s_write_reg(dev->i2s_base, ITER, 1);
+ else
+ i2s_write_reg(dev->i2s_base, IRER, 1);
+
+ /* I2S needs to enable IRQ to make a handshake with DMAC on the JH7110 SoC */
+ if (dev->use_pio || dev->is_jh7110)
+ i2s_enable_irqs(dev, substream->stream, config->chan_nr);
+ else
+ i2s_enable_dma(dev, substream->stream);
+
+ i2s_write_reg(dev->i2s_base, CER, 1);
+}
+
+static void i2s_stop(struct dw_i2s_dev *dev,
+ struct snd_pcm_substream *substream)
+{
+
+ i2s_clear_irqs(dev, substream->stream);
+ if (substream->stream == SNDRV_PCM_STREAM_PLAYBACK)
+ i2s_write_reg(dev->i2s_base, ITER, 0);
+ else
+ i2s_write_reg(dev->i2s_base, IRER, 0);
+
+ if (dev->use_pio || dev->is_jh7110)
+ i2s_disable_irqs(dev, substream->stream, 8);
+ else
+ i2s_disable_dma(dev, substream->stream);
+
+ if (!dev->active) {
+ i2s_write_reg(dev->i2s_base, CER, 0);
+ i2s_write_reg(dev->i2s_base, IER, 0);
+ }
+}
+
+static int dw_i2s_startup(struct snd_pcm_substream *substream,
+ struct snd_soc_dai *cpu_dai)
+{
+ struct dw_i2s_dev *dev = snd_soc_dai_get_drvdata(cpu_dai);
+
+ if (dev->is_jh7110) {
+ struct snd_soc_pcm_runtime *rtd = asoc_substream_to_rtd(substream);
+ struct snd_soc_dai_link *dai_link = rtd->dai_link;
+
+ dai_link->trigger_stop = SND_SOC_TRIGGER_ORDER_LDC;
+ }
+
+ return 0;
+}
+
+static void dw_i2s_config(struct dw_i2s_dev *dev, int stream)
+{
+ u32 ch_reg;
+ struct i2s_clk_config_data *config = &dev->config;
+
+
+ i2s_disable_channels(dev, stream);
+
+ for (ch_reg = 0; ch_reg < (config->chan_nr / 2); ch_reg++) {
+ if (stream == SNDRV_PCM_STREAM_PLAYBACK) {
+ i2s_write_reg(dev->i2s_base, TCR(ch_reg),
+ dev->xfer_resolution);
+ i2s_write_reg(dev->i2s_base, TFCR(ch_reg),
+ dev->fifo_th - 1);
+ i2s_write_reg(dev->i2s_base, TER(ch_reg), TER_TXCHEN |
+ dev->tdm_mask << TER_TXSLOT_SHIFT);
+ } else {
+ i2s_write_reg(dev->i2s_base, RCR(ch_reg),
+ dev->xfer_resolution);
+ i2s_write_reg(dev->i2s_base, RFCR(ch_reg),
+ dev->fifo_th - 1);
+ i2s_write_reg(dev->i2s_base, RER(ch_reg), RER_RXCHEN |
+ dev->tdm_mask << RER_RXSLOT_SHIFT);
+ }
+
+ }
+}
+
+static int dw_i2s_hw_params(struct snd_pcm_substream *substream,
+ struct snd_pcm_hw_params *params, struct snd_soc_dai *dai)
+{
+ struct dw_i2s_dev *dev = snd_soc_dai_get_drvdata(dai);
+ struct i2s_clk_config_data *config = &dev->config;
+ int ret;
+
+ switch (params_format(params)) {
+ case SNDRV_PCM_FORMAT_S16_LE:
+ config->data_width = 16;
+ dev->ccr = 0x00;
+ dev->xfer_resolution = 0x02;
+ break;
+
+ case SNDRV_PCM_FORMAT_S24_LE:
+ config->data_width = 24;
+ dev->ccr = 0x08;
+ dev->xfer_resolution = 0x04;
+ break;
+
+ case SNDRV_PCM_FORMAT_S32_LE:
+ config->data_width = 32;
+ dev->ccr = 0x10;
+ dev->xfer_resolution = 0x05;
+ break;
+
+ default:
+ dev_err(dev->dev, "designware-i2s: unsupported PCM fmt");
+ return -EINVAL;
+ }
+
+ if (dev->tdm_slots)
+ config->data_width = 32;
+
+ config->chan_nr = params_channels(params);
+
+ switch (config->chan_nr) {
+ case EIGHT_CHANNEL_SUPPORT:
+ case SIX_CHANNEL_SUPPORT:
+ case FOUR_CHANNEL_SUPPORT:
+ case TWO_CHANNEL_SUPPORT:
+ break;
+ default:
+ dev_err(dev->dev, "channel not supported\n");
+ return -EINVAL;
+ }
+
+ dw_i2s_config(dev, substream->stream);
+
+ i2s_write_reg(dev->i2s_base, CCR, dev->ccr);
+
+ config->sample_rate = params_rate(params);
+
+ if (dev->capability & DW_I2S_MASTER) {
+ if (dev->i2s_clk_cfg) {
+ ret = dev->i2s_clk_cfg(config);
+ if (ret < 0) {
+ dev_err(dev->dev, "runtime audio clk config fail\n");
+ return ret;
+ }
+ } else {
+ u32 bitclk = config->sample_rate *
+ config->data_width * 2;
+
+ ret = clk_set_rate(dev->clk, bitclk);
+ if (ret) {
+ dev_err(dev->dev, "Can't set I2S clock rate: %d\n",
+ ret);
+ return ret;
+ }
+ }
+ }
+ return 0;
+}
+
+static int dw_i2s_prepare(struct snd_pcm_substream *substream,
+ struct snd_soc_dai *dai)
+{
+ struct dw_i2s_dev *dev = snd_soc_dai_get_drvdata(dai);
+
+ if (substream->stream == SNDRV_PCM_STREAM_PLAYBACK)
+ i2s_write_reg(dev->i2s_base, TXFFR, 1);
+ else
+ i2s_write_reg(dev->i2s_base, RXFFR, 1);
+
+ return 0;
+}
+
+static int dw_i2s_trigger(struct snd_pcm_substream *substream,
+ int cmd, struct snd_soc_dai *dai)
+{
+ struct dw_i2s_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:
+ dev->active++;
+ i2s_start(dev, substream);
+ break;
+
+ case SNDRV_PCM_TRIGGER_STOP:
+ case SNDRV_PCM_TRIGGER_SUSPEND:
+ case SNDRV_PCM_TRIGGER_PAUSE_PUSH:
+ dev->active--;
+ i2s_stop(dev, substream);
+ break;
+ default:
+ ret = -EINVAL;
+ break;
+ }
+ return ret;
+}
+
+static int dw_i2s_set_fmt(struct snd_soc_dai *cpu_dai, unsigned int fmt)
+{
+ struct dw_i2s_dev *dev = snd_soc_dai_get_drvdata(cpu_dai);
+ int ret = 0;
+
+ switch (fmt & SND_SOC_DAIFMT_CLOCK_PROVIDER_MASK) {
+ case SND_SOC_DAIFMT_BC_FC:
+ if (dev->capability & DW_I2S_SLAVE)
+ ret = 0;
+ else
+ ret = -EINVAL;
+ break;
+ case SND_SOC_DAIFMT_BP_FP:
+ if (dev->capability & DW_I2S_MASTER)
+ ret = 0;
+ else
+ ret = -EINVAL;
+ break;
+ case SND_SOC_DAIFMT_BC_FP:
+ case SND_SOC_DAIFMT_BP_FC:
+ ret = -EINVAL;
+ break;
+ default:
+ dev_dbg(dev->dev, "dwc : Invalid clock provider format\n");
+ ret = -EINVAL;
+ break;
+ }
+
+ switch (fmt & SND_SOC_DAIFMT_FORMAT_MASK) {
+ case SND_SOC_DAIFMT_I2S:
+ case SND_SOC_DAIFMT_LEFT_J:
+ case SND_SOC_DAIFMT_RIGHT_J:
+ break;
+ case SND_SOC_DAIFMT_DSP_A:
+ dev->frame_offset = 1;
+ break;
+ case SND_SOC_DAIFMT_DSP_B:
+ dev->frame_offset = 0;
+ break;
+ default:
+ dev_err(dev->dev, "DAI format unsupported");
+ return -EINVAL;
+ }
+
+ return ret;
+}
+
+static int dw_i2s_set_tdm_slot(struct snd_soc_dai *cpu_dai, unsigned int tx_mask,
+ unsigned int rx_mask, int slots, int slot_width)
+{
+ struct dw_i2s_dev *dev = snd_soc_dai_get_drvdata(cpu_dai);
+
+ if (slot_width != 32)
+ return -EINVAL;
+
+ if (slots < 0 || slots > 16)
+ return -EINVAL;
+
+ if (rx_mask != tx_mask)
+ return -EINVAL;
+
+ if (!rx_mask)
+ return -EINVAL;
+
+ dev->tdm_slots = slots;
+ dev->tdm_mask = rx_mask;
+
+ dev->l_reg = RSLOT_TSLOT(ffs(rx_mask) - 1);
+ dev->r_reg = RSLOT_TSLOT(fls(rx_mask) - 1);
+
+ return 0;
+}
+
+static int dw_i2s_dai_probe(struct snd_soc_dai *dai)
+{
+ struct dw_i2s_dev *dev = snd_soc_dai_get_drvdata(dai);
+
+ snd_soc_dai_init_dma_data(dai, &dev->play_dma_data, &dev->capture_dma_data);
+ return 0;
+}
+
+static const struct snd_soc_dai_ops dw_i2s_dai_ops = {
+ .probe = dw_i2s_dai_probe,
+ .startup = dw_i2s_startup,
+ .hw_params = dw_i2s_hw_params,
+ .prepare = dw_i2s_prepare,
+ .trigger = dw_i2s_trigger,
+ .set_fmt = dw_i2s_set_fmt,
+ .set_tdm_slot = dw_i2s_set_tdm_slot,
+};
+
+#ifdef CONFIG_PM
+static int dw_i2s_runtime_suspend(struct device *dev)
+{
+ struct dw_i2s_dev *dw_dev = dev_get_drvdata(dev);
+
+ if (dw_dev->capability & DW_I2S_MASTER)
+ clk_disable(dw_dev->clk);
+ return 0;
+}
+
+static int dw_i2s_runtime_resume(struct device *dev)
+{
+ struct dw_i2s_dev *dw_dev = dev_get_drvdata(dev);
+ int ret;
+
+ if (dw_dev->capability & DW_I2S_MASTER) {
+ ret = clk_enable(dw_dev->clk);
+ if (ret)
+ return ret;
+ }
+ return 0;
+}
+
+static int dw_i2s_suspend(struct snd_soc_component *component)
+{
+ struct dw_i2s_dev *dev = snd_soc_component_get_drvdata(component);
+
+ if (dev->capability & DW_I2S_MASTER)
+ clk_disable(dev->clk);
+ return 0;
+}
+
+static int dw_i2s_resume(struct snd_soc_component *component)
+{
+ struct dw_i2s_dev *dev = snd_soc_component_get_drvdata(component);
+ struct snd_soc_dai *dai;
+ int stream, ret;
+
+ if (dev->capability & DW_I2S_MASTER) {
+ ret = clk_enable(dev->clk);
+ if (ret)
+ return ret;
+ }
+
+ for_each_component_dais(component, dai) {
+ for_each_pcm_streams(stream)
+ if (snd_soc_dai_stream_active(dai, stream))
+ dw_i2s_config(dev, stream);
+ }
+
+ return 0;
+}
+
+#else
+#define dw_i2s_suspend NULL
+#define dw_i2s_resume NULL
+#endif
+
+static const struct snd_soc_component_driver dw_i2s_component = {
+ .name = "dw-i2s",
+ .suspend = dw_i2s_suspend,
+ .resume = dw_i2s_resume,
+ .legacy_dai_naming = 1,
+};
+
+/*
+ * The following tables allow a direct lookup of various parameters
+ * defined in the I2S block's configuration in terms of sound system
+ * parameters. Each table is sized to the number of entries possible
+ * according to the number of configuration bits describing an I2S
+ * block parameter.
+ */
+
+/* Maximum bit resolution of a channel - not uniformly spaced */
+static const u32 fifo_width[COMP_MAX_WORDSIZE] = {
+ 12, 16, 20, 24, 32, 0, 0, 0
+};
+
+/* Width of (DMA) bus */
+static const u32 bus_widths[COMP_MAX_DATA_WIDTH] = {
+ DMA_SLAVE_BUSWIDTH_1_BYTE,
+ DMA_SLAVE_BUSWIDTH_2_BYTES,
+ DMA_SLAVE_BUSWIDTH_4_BYTES,
+ DMA_SLAVE_BUSWIDTH_UNDEFINED
+};
+
+/* PCM format to support channel resolution */
+static const u32 formats[COMP_MAX_WORDSIZE] = {
+ SNDRV_PCM_FMTBIT_S16_LE,
+ SNDRV_PCM_FMTBIT_S16_LE,
+ SNDRV_PCM_FMTBIT_S16_LE | SNDRV_PCM_FMTBIT_S24_LE,
+ SNDRV_PCM_FMTBIT_S16_LE | SNDRV_PCM_FMTBIT_S24_LE,
+ SNDRV_PCM_FMTBIT_S16_LE | SNDRV_PCM_FMTBIT_S24_LE | SNDRV_PCM_FMTBIT_S32_LE,
+ 0,
+ 0,
+ 0
+};
+
+static int dw_configure_dai(struct dw_i2s_dev *dev,
+ struct snd_soc_dai_driver *dw_i2s_dai,
+ unsigned int rates)
+{
+ /*
+ * Read component parameter registers to extract
+ * the I2S block's configuration.
+ */
+ u32 comp1 = i2s_read_reg(dev->i2s_base, dev->i2s_reg_comp1);
+ u32 comp2 = i2s_read_reg(dev->i2s_base, dev->i2s_reg_comp2);
+ u32 fifo_depth = 1 << (1 + COMP1_FIFO_DEPTH_GLOBAL(comp1));
+ u32 idx;
+
+ if (dev->capability & DWC_I2S_RECORD &&
+ dev->quirks & DW_I2S_QUIRK_COMP_PARAM1)
+ comp1 = comp1 & ~BIT(5);
+
+ if (dev->capability & DWC_I2S_PLAY &&
+ dev->quirks & DW_I2S_QUIRK_COMP_PARAM1)
+ comp1 = comp1 & ~BIT(6);
+
+ if (COMP1_TX_ENABLED(comp1)) {
+ dev_dbg(dev->dev, " designware: play supported\n");
+ idx = COMP1_TX_WORDSIZE_0(comp1);
+ if (WARN_ON(idx >= ARRAY_SIZE(formats)))
+ return -EINVAL;
+ if (dev->quirks & DW_I2S_QUIRK_16BIT_IDX_OVERRIDE)
+ idx = 1;
+ dw_i2s_dai->playback.channels_min = MIN_CHANNEL_NUM;
+ dw_i2s_dai->playback.channels_max =
+ 1 << (COMP1_TX_CHANNELS(comp1) + 1);
+ dw_i2s_dai->playback.formats = formats[idx];
+ dw_i2s_dai->playback.rates = rates;
+ }
+
+ if (COMP1_RX_ENABLED(comp1)) {
+ dev_dbg(dev->dev, "designware: record supported\n");
+ idx = COMP2_RX_WORDSIZE_0(comp2);
+ if (WARN_ON(idx >= ARRAY_SIZE(formats)))
+ return -EINVAL;
+ if (dev->quirks & DW_I2S_QUIRK_16BIT_IDX_OVERRIDE)
+ idx = 1;
+ dw_i2s_dai->capture.channels_min = MIN_CHANNEL_NUM;
+ dw_i2s_dai->capture.channels_max =
+ 1 << (COMP1_RX_CHANNELS(comp1) + 1);
+ dw_i2s_dai->capture.formats = formats[idx];
+ dw_i2s_dai->capture.rates = rates;
+ }
+
+ if (COMP1_MODE_EN(comp1)) {
+ dev_dbg(dev->dev, "designware: i2s master mode supported\n");
+ dev->capability |= DW_I2S_MASTER;
+ } else {
+ dev_dbg(dev->dev, "designware: i2s slave mode supported\n");
+ dev->capability |= DW_I2S_SLAVE;
+ }
+
+ dev->fifo_th = fifo_depth / 2;
+ return 0;
+}
+
+static int dw_configure_dai_by_pd(struct dw_i2s_dev *dev,
+ struct snd_soc_dai_driver *dw_i2s_dai,
+ struct resource *res,
+ const struct i2s_platform_data *pdata)
+{
+ u32 comp1 = i2s_read_reg(dev->i2s_base, dev->i2s_reg_comp1);
+ u32 idx = COMP1_APB_DATA_WIDTH(comp1);
+ int ret;
+
+ if (WARN_ON(idx >= ARRAY_SIZE(bus_widths)))
+ return -EINVAL;
+
+ ret = dw_configure_dai(dev, dw_i2s_dai, pdata->snd_rates);
+ if (ret < 0)
+ return ret;
+
+ if (dev->quirks & DW_I2S_QUIRK_16BIT_IDX_OVERRIDE)
+ idx = 1;
+
+ if (dev->is_jh7110) {
+ /* Use platform data and snd_dmaengine_dai_dma_data struct at the same time */
+ u32 comp2 = i2s_read_reg(dev->i2s_base, I2S_COMP_PARAM_2);
+ u32 idx2;
+
+ if (COMP1_TX_ENABLED(comp1)) {
+ idx2 = COMP1_TX_WORDSIZE_0(comp1);
+ dev->play_dma_data.dt.addr = res->start + I2S_TXDMA;
+ dev->play_dma_data.dt.fifo_size = dev->fifo_th * 2 *
+ (fifo_width[idx2]) >> 8;
+ dev->play_dma_data.dt.maxburst = 16;
+ }
+ if (COMP1_RX_ENABLED(comp1)) {
+ idx2 = COMP2_RX_WORDSIZE_0(comp2);
+ dev->capture_dma_data.dt.addr = res->start + I2S_RXDMA;
+ dev->capture_dma_data.dt.fifo_size = dev->fifo_th * 2 *
+ (fifo_width[idx2] >> 8);
+ dev->capture_dma_data.dt.maxburst = 16;
+ }
+ } else {
+ /* Set DMA slaves info */
+ dev->play_dma_data.pd.data = pdata->play_dma_data;
+ dev->capture_dma_data.pd.data = pdata->capture_dma_data;
+ dev->play_dma_data.pd.addr = res->start + I2S_TXDMA;
+ dev->capture_dma_data.pd.addr = res->start + I2S_RXDMA;
+ dev->play_dma_data.pd.max_burst = 16;
+ dev->capture_dma_data.pd.max_burst = 16;
+ dev->play_dma_data.pd.addr_width = bus_widths[idx];
+ dev->capture_dma_data.pd.addr_width = bus_widths[idx];
+ dev->play_dma_data.pd.filter = pdata->filter;
+ dev->capture_dma_data.pd.filter = pdata->filter;
+ }
+
+ return 0;
+}
+
+static int dw_configure_dai_by_dt(struct dw_i2s_dev *dev,
+ struct snd_soc_dai_driver *dw_i2s_dai,
+ struct resource *res)
+{
+ u32 comp1 = i2s_read_reg(dev->i2s_base, I2S_COMP_PARAM_1);
+ u32 comp2 = i2s_read_reg(dev->i2s_base, I2S_COMP_PARAM_2);
+ u32 fifo_depth = 1 << (1 + COMP1_FIFO_DEPTH_GLOBAL(comp1));
+ u32 idx2;
+ int ret;
+
+ ret = dw_configure_dai(dev, dw_i2s_dai, SNDRV_PCM_RATE_8000_192000);
+ if (ret < 0)
+ return ret;
+
+ if (COMP1_TX_ENABLED(comp1)) {
+ idx2 = COMP1_TX_WORDSIZE_0(comp1);
+
+ dev->capability |= DWC_I2S_PLAY;
+ dev->play_dma_data.dt.addr = res->start + I2S_TXDMA;
+ dev->play_dma_data.dt.fifo_size = fifo_depth *
+ (fifo_width[idx2]) >> 8;
+ dev->play_dma_data.dt.maxburst = 16;
+ }
+ if (COMP1_RX_ENABLED(comp1)) {
+ idx2 = COMP2_RX_WORDSIZE_0(comp2);
+
+ dev->capability |= DWC_I2S_RECORD;
+ dev->capture_dma_data.dt.addr = res->start + I2S_RXDMA;
+ dev->capture_dma_data.dt.fifo_size = fifo_depth *
+ (fifo_width[idx2] >> 8);
+ dev->capture_dma_data.dt.maxburst = 16;
+ }
+
+ return 0;
+
+}
+
+#ifdef CONFIG_OF
+/* clocks initialization with master mode on JH7110 SoC */
+static int jh7110_i2s_crg_master_init(struct dw_i2s_dev *dev)
+{
+ static struct clk_bulk_data clks[] = {
+ { .id = "mclk" },
+ { .id = "mclk_ext" },
+ { .id = "mclk_inner" },
+ { .id = "apb" },
+ { .id = "i2sclk" },
+ };
+ struct reset_control *resets = devm_reset_control_array_get_exclusive(dev->dev);
+ int ret;
+ struct clk *pclk;
+ struct clk *bclk_mst;
+ struct clk *mclk;
+ struct clk *mclk_ext;
+ struct clk *mclk_inner;
+
+ if (IS_ERR(resets))
+ return dev_err_probe(dev->dev, PTR_ERR(resets), "failed to get i2s resets\n");
+
+ ret = clk_bulk_get(dev->dev, ARRAY_SIZE(clks), clks);
+ if (ret)
+ return dev_err_probe(dev->dev, ret, "failed to get i2s clocks\n");
+
+ mclk = clks[0].clk;
+ mclk_ext = clks[1].clk;
+ mclk_inner = clks[2].clk;
+ pclk = clks[3].clk;
+ bclk_mst = clks[4].clk;
+
+ ret = clk_prepare_enable(pclk);
+ if (ret)
+ goto exit;
+
+ /* Use inner mclk first and avoid uninitialized gpio for external mclk */
+ ret = clk_set_parent(mclk, mclk_inner);
+ if (ret)
+ goto err_dis_pclk;
+
+ ret = clk_prepare_enable(bclk_mst);
+ if (ret)
+ goto err_dis_pclk;
+
+ /* deassert resets before set clock parent */
+ ret = reset_control_deassert(resets);
+ if (ret)
+ goto err_dis_all;
+
+ /* external clock (12.288MHz) for Audio */
+ ret = clk_set_parent(mclk, mclk_ext);
+ if (ret)
+ goto err_dis_all;
+
+ /* i2sclk will be got and enabled repeatedly later and should be disabled now. */
+ clk_disable_unprepare(bclk_mst);
+ clk_bulk_put(ARRAY_SIZE(clks), clks);
+ dev->is_jh7110 = true;
+
+ return 0;
+
+err_dis_all:
+ clk_disable_unprepare(bclk_mst);
+err_dis_pclk:
+ clk_disable_unprepare(pclk);
+exit:
+ clk_bulk_put(ARRAY_SIZE(clks), clks);
+ return ret;
+}
+
+/* clocks initialization with slave mode on JH7110 SoC */
+static int jh7110_i2s_crg_slave_init(struct dw_i2s_dev *dev)
+{
+ static struct clk_bulk_data clks[] = {
+ { .id = "mclk" },
+ { .id = "mclk_ext" },
+ { .id = "apb" },
+ { .id = "bclk_ext" },
+ { .id = "lrck_ext" },
+ { .id = "bclk" },
+ { .id = "lrck" },
+ { .id = "mclk_inner" },
+ { .id = "i2sclk" },
+ };
+ struct reset_control *resets = devm_reset_control_array_get_exclusive(dev->dev);
+ int ret;
+ struct clk *pclk;
+ struct clk *bclk_mst;
+ struct clk *bclk_ext;
+ struct clk *lrck_ext;
+ struct clk *bclk;
+ struct clk *lrck;
+ struct clk *mclk;
+ struct clk *mclk_ext;
+ struct clk *mclk_inner;
+
+ if (IS_ERR(resets))
+ return dev_err_probe(dev->dev, PTR_ERR(resets), "failed to get i2s resets\n");
+
+ ret = clk_bulk_get(dev->dev, ARRAY_SIZE(clks), clks);
+ if (ret)
+ return dev_err_probe(dev->dev, ret, "failed to get i2s clocks\n");
+
+ mclk = clks[0].clk;
+ mclk_ext = clks[1].clk;
+ pclk = clks[2].clk;
+ bclk_ext = clks[3].clk;
+ lrck_ext = clks[4].clk;
+ bclk = clks[5].clk;
+ lrck = clks[6].clk;
+ mclk_inner = clks[7].clk;
+ bclk_mst = clks[8].clk;
+
+ ret = clk_prepare_enable(pclk);
+ if (ret)
+ goto exit;
+
+ ret = clk_set_parent(mclk, mclk_inner);
+ if (ret)
+ goto err_dis_pclk;
+
+ ret = clk_prepare_enable(bclk_mst);
+ if (ret)
+ goto err_dis_pclk;
+
+ ret = reset_control_deassert(resets);
+ if (ret)
+ goto err_dis_all;
+
+ /* The sources of BCLK and LRCK are the external codec. */
+ ret = clk_set_parent(bclk, bclk_ext);
+ if (ret)
+ goto err_dis_all;
+
+ ret = clk_set_parent(lrck, lrck_ext);
+ if (ret)
+ goto err_dis_all;
+
+ ret = clk_set_parent(mclk, mclk_ext);
+ if (ret)
+ goto err_dis_all;
+
+ /* The i2sclk will be got and enabled repeatedly later and should be disabled now. */
+ clk_disable_unprepare(bclk_mst);
+ clk_bulk_put(ARRAY_SIZE(clks), clks);
+ dev->is_jh7110 = true;
+
+ return 0;
+
+err_dis_all:
+ clk_disable_unprepare(bclk_mst);
+err_dis_pclk:
+ clk_disable_unprepare(pclk);
+exit:
+ clk_bulk_put(ARRAY_SIZE(clks), clks);
+ return ret;
+}
+
+/* Special syscon initialization about RX channel with slave mode on JH7110 SoC */
+static int jh7110_i2srx_crg_init(struct dw_i2s_dev *dev)
+{
+ struct regmap *regmap;
+ unsigned int args[2];
+
+ regmap = syscon_regmap_lookup_by_phandle_args(dev->dev->of_node,
+ "starfive,syscon",
+ 2, args);
+ if (IS_ERR(regmap))
+ return dev_err_probe(dev->dev, PTR_ERR(regmap), "getting the regmap failed\n");
+
+ /* Enable I2Srx with syscon register, args[0]: offset, args[1]: mask */
+ regmap_update_bits(regmap, args[0], args[1], args[1]);
+
+ return jh7110_i2s_crg_slave_init(dev);
+}
+
+static int jh7110_i2stx0_clk_cfg(struct i2s_clk_config_data *config)
+{
+ struct dw_i2s_dev *dev = container_of(config, struct dw_i2s_dev, config);
+ u32 bclk_rate = config->sample_rate * 64;
+
+ return clk_set_rate(dev->clk, bclk_rate);
+}
+#endif /* CONFIG_OF */
+
+static int dw_i2s_probe(struct platform_device *pdev)
+{
+ const struct i2s_platform_data *pdata = pdev->dev.platform_data;
+ struct dw_i2s_dev *dev;
+ struct resource *res;
+ int ret, irq;
+ struct snd_soc_dai_driver *dw_i2s_dai;
+ const char *clk_id;
+
+ dev = devm_kzalloc(&pdev->dev, sizeof(*dev), GFP_KERNEL);
+ if (!dev)
+ return -ENOMEM;
+
+ dw_i2s_dai = devm_kzalloc(&pdev->dev, sizeof(*dw_i2s_dai), GFP_KERNEL);
+ if (!dw_i2s_dai)
+ return -ENOMEM;
+
+ dw_i2s_dai->ops = &dw_i2s_dai_ops;
+
+ dev->i2s_base = devm_platform_get_and_ioremap_resource(pdev, 0, &res);
+ if (IS_ERR(dev->i2s_base))
+ return PTR_ERR(dev->i2s_base);
+
+ dev->dev = &pdev->dev;
+ dev->is_jh7110 = false;
+ if (pdata) {
+ if (pdata->i2s_pd_init) {
+ ret = pdata->i2s_pd_init(dev);
+ if (ret)
+ return ret;
+ }
+ }
+
+ if (!dev->is_jh7110) {
+ dev->reset = devm_reset_control_array_get_optional_shared(&pdev->dev);
+ if (IS_ERR(dev->reset))
+ return PTR_ERR(dev->reset);
+
+ ret = reset_control_deassert(dev->reset);
+ if (ret)
+ return ret;
+ }
+
+ irq = platform_get_irq_optional(pdev, 0);
+ if (irq >= 0) {
+ ret = devm_request_irq(&pdev->dev, irq, i2s_irq_handler, 0,
+ pdev->name, dev);
+ if (ret < 0) {
+ dev_err(&pdev->dev, "failed to request irq\n");
+ goto err_assert_reset;
+ }
+ }
+
+ dev->i2s_reg_comp1 = I2S_COMP_PARAM_1;
+ dev->i2s_reg_comp2 = I2S_COMP_PARAM_2;
+ if (pdata) {
+ dev->capability = pdata->cap;
+ clk_id = NULL;
+ dev->quirks = pdata->quirks;
+ if (dev->quirks & DW_I2S_QUIRK_COMP_REG_OFFSET) {
+ dev->i2s_reg_comp1 = pdata->i2s_reg_comp1;
+ dev->i2s_reg_comp2 = pdata->i2s_reg_comp2;
+ }
+ ret = dw_configure_dai_by_pd(dev, dw_i2s_dai, res, pdata);
+ } else {
+ clk_id = "i2sclk";
+ ret = dw_configure_dai_by_dt(dev, dw_i2s_dai, res);
+ }
+ if (ret < 0)
+ goto err_assert_reset;
+
+ if (dev->capability & DW_I2S_MASTER) {
+ if (pdata) {
+ dev->i2s_clk_cfg = pdata->i2s_clk_cfg;
+ if (!dev->i2s_clk_cfg) {
+ dev_err(&pdev->dev, "no clock configure method\n");
+ ret = -ENODEV;
+ goto err_assert_reset;
+ }
+ }
+ dev->clk = devm_clk_get(&pdev->dev, clk_id);
+
+ if (IS_ERR(dev->clk)) {
+ ret = PTR_ERR(dev->clk);
+ goto err_assert_reset;
+ }
+
+ ret = clk_prepare_enable(dev->clk);
+ if (ret < 0)
+ goto err_assert_reset;
+ }
+
+ dev_set_drvdata(&pdev->dev, dev);
+ ret = devm_snd_soc_register_component(&pdev->dev, &dw_i2s_component,
+ dw_i2s_dai, 1);
+ if (ret != 0) {
+ dev_err(&pdev->dev, "not able to register dai\n");
+ goto err_clk_disable;
+ }
+
+ if (!pdata || dev->is_jh7110) {
+ if (irq >= 0) {
+ ret = dw_pcm_register(pdev);
+ dev->use_pio = true;
+ dev->l_reg = LRBR_LTHR(0);
+ dev->r_reg = RRBR_RTHR(0);
+ } else {
+ ret = devm_snd_dmaengine_pcm_register(&pdev->dev, NULL,
+ 0);
+ dev->use_pio = false;
+ }
+
+ if (ret) {
+ dev_err(&pdev->dev, "could not register pcm: %d\n",
+ ret);
+ goto err_clk_disable;
+ }
+ }
+
+ pm_runtime_enable(&pdev->dev);
+ return 0;
+
+err_clk_disable:
+ if (dev->capability & DW_I2S_MASTER)
+ clk_disable_unprepare(dev->clk);
+err_assert_reset:
+ reset_control_assert(dev->reset);
+ return ret;
+}
+
+static void dw_i2s_remove(struct platform_device *pdev)
+{
+ struct dw_i2s_dev *dev = dev_get_drvdata(&pdev->dev);
+
+ if (dev->capability & DW_I2S_MASTER)
+ clk_disable_unprepare(dev->clk);
+
+ reset_control_assert(dev->reset);
+ pm_runtime_disable(&pdev->dev);
+}
+
+#ifdef CONFIG_OF
+static const struct i2s_platform_data jh7110_i2stx0_data = {
+ .cap = DWC_I2S_PLAY | DW_I2S_MASTER,
+ .channel = TWO_CHANNEL_SUPPORT,
+ .snd_fmts = SNDRV_PCM_FMTBIT_S16_LE | SNDRV_PCM_FMTBIT_S32_LE,
+ .snd_rates = SNDRV_PCM_RATE_32000 | SNDRV_PCM_RATE_48000,
+ .i2s_clk_cfg = jh7110_i2stx0_clk_cfg,
+ .i2s_pd_init = jh7110_i2s_crg_master_init,
+};
+
+static const struct i2s_platform_data jh7110_i2stx1_data = {
+ .cap = DWC_I2S_PLAY | DW_I2S_SLAVE,
+ .channel = TWO_CHANNEL_SUPPORT,
+ .snd_fmts = SNDRV_PCM_FMTBIT_S16_LE | SNDRV_PCM_FMTBIT_S32_LE,
+ .snd_rates = SNDRV_PCM_RATE_8000_192000,
+ .i2s_pd_init = jh7110_i2s_crg_slave_init,
+};
+
+static const struct i2s_platform_data jh7110_i2srx_data = {
+ .cap = DWC_I2S_RECORD | DW_I2S_SLAVE,
+ .channel = TWO_CHANNEL_SUPPORT,
+ .snd_fmts = SNDRV_PCM_FMTBIT_S16_LE | SNDRV_PCM_FMTBIT_S32_LE,
+ .snd_rates = SNDRV_PCM_RATE_8000_192000,
+ .i2s_pd_init = jh7110_i2srx_crg_init,
+};
+
+static const struct of_device_id dw_i2s_of_match[] = {
+ { .compatible = "snps,designware-i2s", },
+ { .compatible = "starfive,jh7110-i2stx0", .data = &jh7110_i2stx0_data, },
+ { .compatible = "starfive,jh7110-i2stx1", .data = &jh7110_i2stx1_data,},
+ { .compatible = "starfive,jh7110-i2srx", .data = &jh7110_i2srx_data,},
+ {},
+};
+
+MODULE_DEVICE_TABLE(of, dw_i2s_of_match);
+#endif
+
+static const struct dev_pm_ops dwc_pm_ops = {
+ SET_RUNTIME_PM_OPS(dw_i2s_runtime_suspend, dw_i2s_runtime_resume, NULL)
+};
+
+static struct platform_driver dw_i2s_driver = {
+ .probe = dw_i2s_probe,
+ .remove_new = dw_i2s_remove,
+ .driver = {
+ .name = "designware-i2s",
+ .of_match_table = of_match_ptr(dw_i2s_of_match),
+ .pm = &dwc_pm_ops,
+ },
+};
+
+module_platform_driver(dw_i2s_driver);
+
+MODULE_AUTHOR("Rajeev Kumar <rajeevkumar.linux@gmail.com>");
+MODULE_DESCRIPTION("DESIGNWARE I2S SoC Interface");
+MODULE_LICENSE("GPL");
+MODULE_ALIAS("platform:designware_i2s");