#define IMX_ESAI_NET (1 << 0)
#define IMX_ESAI_SYN (1 << 1)
+static inline void write_esai_mask(u32 __iomem *addr, u32 clear, u32 set)
+{
+ u32 val = readl(addr);
+ val = (val & ~clear) | set;
+ writel(val, addr);
+}
+
static int fsl_esai_set_dai_sysclk(struct snd_soc_dai *cpu_dai,
int clk_id, unsigned int freq, int dir)
{
clk_enable(esai->clk);
clk_prepare_enable(esai->dmaclk);
+ esai->substream[substream->stream] = substream;
+
ESAI_DUMP();
return 0;
}
writel(0, esai->base + ESAI_PCRC);
}
+ esai->substream[substream->stream] = NULL;
+
clk_disable_unprepare(esai->dmaclk);
clk_disable(esai->clk);
}
.name = "fsl-esai",
};
+static bool fsl_esai_check_xrun(struct snd_pcm_substream *substream)
+{
+ struct snd_soc_pcm_runtime *rtd = substream->private_data;
+ struct snd_soc_dai *cpu_dai = rtd->cpu_dai;
+ struct fsl_esai *esai = snd_soc_dai_get_drvdata(cpu_dai);
+ u32 saisr = readl(esai->base + ESAI_SAISR);
+
+ return saisr & (ESAI_SAISR_TUE | ESAI_SAISR_ROE) ;
+}
+
+static int store_reg(struct snd_soc_dai *cpu_dai)
+{
+ struct fsl_esai *esai = snd_soc_dai_get_drvdata(cpu_dai);
+
+ esai->reg_cache[0] = readl(esai->base + ESAI_ECR);
+ esai->reg_cache[2] = readl(esai->base + ESAI_TFCR);
+ esai->reg_cache[4] = readl(esai->base + ESAI_RFCR);
+ esai->reg_cache[8] = readl(esai->base + ESAI_SAICR);
+ esai->reg_cache[9] = readl(esai->base + ESAI_TCR);
+ esai->reg_cache[10] = readl(esai->base + ESAI_TCCR);
+ esai->reg_cache[11] = readl(esai->base + ESAI_RCR);
+ esai->reg_cache[12] = readl(esai->base + ESAI_RCCR);
+ esai->reg_cache[13] = readl(esai->base + ESAI_TSMA);
+ esai->reg_cache[14] = readl(esai->base + ESAI_TSMB);
+ esai->reg_cache[15] = readl(esai->base + ESAI_RSMA);
+ esai->reg_cache[16] = readl(esai->base + ESAI_RSMB);
+ return 0;
+}
+
+static int restore_reg(struct snd_soc_dai *cpu_dai)
+{
+ struct fsl_esai *esai = snd_soc_dai_get_drvdata(cpu_dai);
+
+ writel(esai->reg_cache[0], esai->base + ESAI_ECR);
+ writel(esai->reg_cache[2] & ~ESAI_TFCR_TFEN, esai->base + ESAI_TFCR);
+ writel(esai->reg_cache[4] & ~ESAI_RFCR_RFEN, esai->base + ESAI_RFCR);
+ writel(esai->reg_cache[8], esai->base + ESAI_SAICR);
+ writel(esai->reg_cache[9] & ~ESAI_TCR_TE(12), esai->base + ESAI_TCR);
+ writel(esai->reg_cache[10], esai->base + ESAI_TCCR);
+ writel(esai->reg_cache[11] & ~ESAI_RCR_RE(8), esai->base + ESAI_RCR);
+ writel(esai->reg_cache[12], esai->base + ESAI_RCCR);
+ writel(esai->reg_cache[13], esai->base + ESAI_TSMA);
+ writel(esai->reg_cache[14], esai->base + ESAI_TSMB);
+ writel(esai->reg_cache[15], esai->base + ESAI_RSMA);
+ writel(esai->reg_cache[16], esai->base + ESAI_RSMB);
+ return 0;
+}
+
+static int stop_lock_stream(struct snd_pcm_substream *substream)
+{
+ if (substream) {
+ snd_pcm_stream_lock_irq(substream);
+ if (substream->runtime->status->state == SNDRV_PCM_STATE_RUNNING)
+ substream->ops->trigger(substream, SNDRV_PCM_TRIGGER_STOP);
+ }
+ return 0;
+}
+
+static int start_unlock_stream(struct snd_pcm_substream *substream)
+{
+ if (substream) {
+ if (substream->runtime->status->state == SNDRV_PCM_STATE_RUNNING)
+ substream->ops->trigger(substream, SNDRV_PCM_TRIGGER_START);
+ snd_pcm_stream_unlock_irq(substream);
+ }
+ return 0;
+}
+
+/*
+ *Here is ESAI underrun reset step:
+ *1. Read "TUE" and got TUE=1
+ *2. stop DMA.
+ *3. stop ESAI TX section.
+ *4. Set the transmitter section individual reset "TPR=1"
+ *5. Reset the ESAI Transmit FIFO (set ESAI_TFCR[1]=1).
+ *6. Config the control registers ESAI_TCCR and ESAI_TCR.config the Transmit FIFO register.
+ *7. clear "TPR"
+ *8. read "TUE"
+ *9. Prefill ESAI TX FIFO.
+ *10.Start DMA.
+ *11 Enable the ESAI
+ */
+static void fsl_esai_reset(struct snd_pcm_substream *substream, bool stop)
+{
+ struct snd_soc_pcm_runtime *rtd = substream->private_data;
+ struct snd_soc_dai *cpu_dai = rtd->cpu_dai;
+ struct fsl_esai *esai = snd_soc_dai_get_drvdata(cpu_dai);
+ ESAI_DUMP();
+
+ if (stop) {
+ stop_lock_stream(esai->substream[0]);
+ stop_lock_stream(esai->substream[1]);
+ }
+
+ store_reg(cpu_dai);
+
+ writel(ESAI_ECR_ESAIEN | ESAI_ECR_ERST, esai->base + ESAI_ECR);
+ writel(ESAI_ECR_ESAIEN, esai->base + ESAI_ECR);
+
+ write_esai_mask(esai->base+ESAI_TCR, 0, ESAI_TCR_TPR);
+ write_esai_mask(esai->base+ESAI_RCR, 0, ESAI_RCR_RPR);
+
+ restore_reg(cpu_dai);
+
+ write_esai_mask(esai->base+ESAI_TCR, ESAI_TCR_TPR, 0);
+ write_esai_mask(esai->base+ESAI_RCR, ESAI_RCR_RPR, 0);
+
+ writel(ESAI_GPIO_ESAI, esai->base + ESAI_PRRC);
+ writel(ESAI_GPIO_ESAI, esai->base + ESAI_PCRC);
+
+ /* read "TUE" flag.*/
+ readl(esai->base + ESAI_SAISR);
+
+ if (stop) {
+ start_unlock_stream(esai->substream[1]);
+ start_unlock_stream(esai->substream[0]);
+ }
+ ESAI_DUMP();
+}
+
static int fsl_esai_reg_init(struct fsl_esai *esai)
{
u32 xccr, slots = 2;
esai->dma_params_tx.filter_data = &esai->filter_data_tx;
esai->dma_params_rx.filter_data = &esai->filter_data_rx;
+ esai->dma_params_tx.check_xrun = fsl_esai_check_xrun;
+ esai->dma_params_rx.check_xrun = fsl_esai_check_xrun;
+ esai->dma_params_tx.device_reset = fsl_esai_reset;
+ esai->dma_params_rx.device_reset = fsl_esai_reset;
+
ret = of_property_read_u32_array(pdev->dev.of_node,
"fsl,esai-dma-events", dma_events, 2);
if (ret) {
}
}
+static void imx_pcm_dma_complete(void *arg)
+{
+ struct snd_pcm_substream *substream = arg;
+ struct snd_soc_pcm_runtime *rtd = substream->private_data;
+ struct dmaengine_pcm_runtime_data *prtd = substream->runtime->private_data;
+ struct snd_dmaengine_dai_dma_data *dma_data;
+
+ prtd->pos += snd_pcm_lib_period_bytes(substream);
+ if (prtd->pos >= snd_pcm_lib_buffer_bytes(substream))
+ prtd->pos = 0;
+
+ snd_pcm_period_elapsed(substream);
+
+ dma_data = snd_soc_dai_get_dma_data(rtd->cpu_dai, substream);
+ if (dma_data->check_xrun && dma_data->check_xrun(substream))
+ dma_data->device_reset(substream, 1);
+}
+
static int imx_pcm_dma_prepare_slave_config(struct snd_pcm_substream *substream,
struct snd_pcm_hw_params *params, struct dma_slave_config *slave_config)
{
struct snd_soc_pcm_runtime *rtd = substream->private_data;
struct snd_dmaengine_dai_dma_data *dma_data;
+ struct dmaengine_pcm_runtime_data *prtd = substream->runtime->private_data;
int ret;
dma_data = snd_soc_dai_get_dma_data(rtd->cpu_dai, substream);
+ prtd->callback = imx_pcm_dma_complete;
ret = snd_hwparams_to_dma_slave_config(substream, params, slave_config);
if (ret)