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Diffstat (limited to 'sound/soc/intel/keembay/kmb_platform.c')
-rw-r--r--sound/soc/intel/keembay/kmb_platform.c230
1 files changed, 214 insertions, 16 deletions
diff --git a/sound/soc/intel/keembay/kmb_platform.c b/sound/soc/intel/keembay/kmb_platform.c
index 1c3748f33136..0fd1e8f62c89 100644
--- a/sound/soc/intel/keembay/kmb_platform.c
+++ b/sound/soc/intel/keembay/kmb_platform.c
@@ -5,11 +5,14 @@
// Intel KeemBay Platform driver.
//
+#include <linux/bitrev.h>
#include <linux/clk.h>
+#include <linux/dma-mapping.h>
#include <linux/io.h>
#include <linux/module.h>
#include <linux/of.h>
#include <linux/of_device.h>
+#include <sound/dmaengine_pcm.h>
#include <sound/pcm.h>
#include <sound/pcm_params.h>
#include <sound/soc.h>
@@ -37,7 +40,8 @@ static const struct snd_pcm_hardware kmb_pcm_hardware = {
.rate_max = 48000,
.formats = SNDRV_PCM_FMTBIT_S16_LE |
SNDRV_PCM_FMTBIT_S24_LE |
- SNDRV_PCM_FMTBIT_S32_LE,
+ SNDRV_PCM_FMTBIT_S32_LE |
+ SNDRV_PCM_FMTBIT_IEC958_SUBFRAME_LE,
.channels_min = 2,
.channels_max = 2,
.buffer_bytes_max = BUFFER_BYTES_MAX,
@@ -48,6 +52,50 @@ static const struct snd_pcm_hardware kmb_pcm_hardware = {
.fifo_size = 16,
};
+/*
+ * Convert to ADV7511 HDMI hardware format.
+ * ADV7511 HDMI chip need parity bit replaced by block start bit and
+ * with the preamble bits left out.
+ * ALSA IEC958 subframe format:
+ * bit 0-3 = preamble (0x8 = block start)
+ * 4-7 = AUX (=0)
+ * 8-27 = audio data (without AUX if 24bit sample)
+ * 28 = validity
+ * 29 = user data
+ * 30 = channel status
+ * 31 = parity
+ *
+ * ADV7511 IEC958 subframe format:
+ * bit 0-23 = audio data
+ * 24 = validity
+ * 25 = user data
+ * 26 = channel status
+ * 27 = block start
+ * 28-31 = 0
+ * MSB to LSB bit reverse by software as hardware not supporting it.
+ */
+static void hdmi_reformat_iec958(struct snd_pcm_runtime *runtime,
+ struct kmb_i2s_info *kmb_i2s,
+ unsigned int tx_ptr)
+{
+ u32(*buf)[2] = (void *)runtime->dma_area;
+ unsigned long temp;
+ u32 i, j, sample;
+
+ for (i = 0; i < kmb_i2s->fifo_th; i++) {
+ j = 0;
+ do {
+ temp = buf[tx_ptr][j];
+ /* Replace parity with block start*/
+ assign_bit(31, &temp, (BIT(3) & temp));
+ sample = bitrev32(temp);
+ buf[tx_ptr][j] = sample << 4;
+ j++;
+ } while (j < 2);
+ tx_ptr++;
+ }
+}
+
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)
@@ -63,6 +111,8 @@ static unsigned int kmb_pcm_tx_fn(struct kmb_i2s_info *kmb_i2s,
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 {
+ if (kmb_i2s->iec958_fmt)
+ hdmi_reformat_iec958(runtime, kmb_i2s, tx_ptr);
writel(((u32(*)[2])buf)[tx_ptr][0], i2s_base + LRBR_LTHR(0));
writel(((u32(*)[2])buf)[tx_ptr][1], i2s_base + RRBR_RTHR(0));
}
@@ -233,6 +283,7 @@ static int kmb_pcm_trigger(struct snd_soc_component *component,
kmb_i2s->tx_substream = NULL;
else
kmb_i2s->rx_substream = NULL;
+ kmb_i2s->iec958_fmt = false;
break;
default:
return -EINVAL;
@@ -343,6 +394,53 @@ static const struct snd_soc_component_driver kmb_component = {
.pointer = kmb_pcm_pointer,
};
+static const struct snd_soc_component_driver kmb_component_dma = {
+ .name = "kmb",
+};
+
+static int kmb_probe(struct snd_soc_dai *cpu_dai)
+{
+ struct kmb_i2s_info *kmb_i2s = snd_soc_dai_get_drvdata(cpu_dai);
+
+ if (kmb_i2s->use_pio)
+ return 0;
+
+ snd_soc_dai_init_dma_data(cpu_dai, &kmb_i2s->play_dma_data,
+ &kmb_i2s->capture_dma_data);
+
+ return 0;
+}
+
+static inline void kmb_i2s_enable_dma(struct kmb_i2s_info *kmb_i2s, u32 stream)
+{
+ u32 dma_reg;
+
+ dma_reg = readl(kmb_i2s->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;
+
+ writel(dma_reg, kmb_i2s->i2s_base + I2S_DMACR);
+}
+
+static inline void kmb_i2s_disable_dma(struct kmb_i2s_info *kmb_i2s, u32 stream)
+{
+ u32 dma_reg;
+
+ dma_reg = readl(kmb_i2s->i2s_base + I2S_DMACR);
+ /* Disable DMA handshake for stream */
+ if (stream == SNDRV_PCM_STREAM_PLAYBACK) {
+ dma_reg &= ~I2S_DMAEN_TXBLOCK;
+ writel(1, kmb_i2s->i2s_base + I2S_RTXDMA);
+ } else {
+ dma_reg &= ~I2S_DMAEN_RXBLOCK;
+ writel(1, kmb_i2s->i2s_base + I2S_RRXDMA);
+ }
+ writel(dma_reg, kmb_i2s->i2s_base + I2S_DMACR);
+}
+
static void kmb_i2s_start(struct kmb_i2s_info *kmb_i2s,
struct snd_pcm_substream *substream)
{
@@ -356,7 +454,11 @@ static void kmb_i2s_start(struct kmb_i2s_info *kmb_i2s,
else
writel(1, kmb_i2s->i2s_base + IRER);
- kmb_i2s_irq_trigger(kmb_i2s, substream->stream, config->chan_nr, true);
+ if (kmb_i2s->use_pio)
+ kmb_i2s_irq_trigger(kmb_i2s, substream->stream,
+ config->chan_nr, true);
+ else
+ kmb_i2s_enable_dma(kmb_i2s, substream->stream);
if (kmb_i2s->clock_provider)
writel(1, kmb_i2s->i2s_base + CER);
@@ -434,7 +536,8 @@ static int kmb_dai_trigger(struct snd_pcm_substream *substream,
break;
case SNDRV_PCM_TRIGGER_STOP:
kmb_i2s->active--;
- kmb_i2s_stop(kmb_i2s, substream);
+ if (kmb_i2s->use_pio)
+ kmb_i2s_stop(kmb_i2s, substream);
break;
default:
return -EINVAL;
@@ -485,16 +588,25 @@ static int kmb_dai_hw_params(struct snd_pcm_substream *substream,
config->data_width = 16;
kmb_i2s->ccr = 0x00;
kmb_i2s->xfer_resolution = 0x02;
+ kmb_i2s->play_dma_data.addr_width = DMA_SLAVE_BUSWIDTH_2_BYTES;
+ kmb_i2s->capture_dma_data.addr_width = DMA_SLAVE_BUSWIDTH_2_BYTES;
break;
case SNDRV_PCM_FORMAT_S24_LE:
config->data_width = 32;
kmb_i2s->ccr = 0x14;
kmb_i2s->xfer_resolution = 0x05;
+ kmb_i2s->play_dma_data.addr_width = DMA_SLAVE_BUSWIDTH_4_BYTES;
+ kmb_i2s->capture_dma_data.addr_width = DMA_SLAVE_BUSWIDTH_4_BYTES;
break;
+ case SNDRV_PCM_FORMAT_IEC958_SUBFRAME_LE:
+ kmb_i2s->iec958_fmt = true;
+ fallthrough;
case SNDRV_PCM_FORMAT_S32_LE:
config->data_width = 32;
kmb_i2s->ccr = 0x10;
kmb_i2s->xfer_resolution = 0x05;
+ kmb_i2s->play_dma_data.addr_width = DMA_SLAVE_BUSWIDTH_4_BYTES;
+ kmb_i2s->capture_dma_data.addr_width = DMA_SLAVE_BUSWIDTH_4_BYTES;
break;
default:
dev_err(kmb_i2s->dev, "kmb: unsupported PCM fmt");
@@ -572,13 +684,78 @@ static int kmb_dai_prepare(struct snd_pcm_substream *substream,
return 0;
}
+static int kmb_dai_startup(struct snd_pcm_substream *substream,
+ struct snd_soc_dai *cpu_dai)
+{
+ struct kmb_i2s_info *kmb_i2s = snd_soc_dai_get_drvdata(cpu_dai);
+ struct snd_dmaengine_dai_dma_data *dma_data;
+
+ if (kmb_i2s->use_pio)
+ return 0;
+
+ if (substream->stream == SNDRV_PCM_STREAM_PLAYBACK)
+ dma_data = &kmb_i2s->play_dma_data;
+ else
+ dma_data = &kmb_i2s->capture_dma_data;
+
+ snd_soc_dai_set_dma_data(cpu_dai, substream, dma_data);
+
+ return 0;
+}
+
+static int kmb_dai_hw_free(struct snd_pcm_substream *substream,
+ struct snd_soc_dai *cpu_dai)
+{
+ struct kmb_i2s_info *kmb_i2s = snd_soc_dai_get_drvdata(cpu_dai);
+ /* I2S Programming sequence in Keem_Bay_VPU_DB_v1.1 */
+ if (kmb_i2s->use_pio)
+ 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);
+
+ if (kmb_i2s->use_pio)
+ kmb_i2s_irq_trigger(kmb_i2s, substream->stream, 8, false);
+ else
+ kmb_i2s_disable_dma(kmb_i2s, substream->stream);
+
+ if (!kmb_i2s->active) {
+ writel(0, kmb_i2s->i2s_base + CER);
+ writel(0, kmb_i2s->i2s_base + IER);
+ }
+
+ return 0;
+}
+
static struct snd_soc_dai_ops kmb_dai_ops = {
+ .startup = kmb_dai_startup,
.trigger = kmb_dai_trigger,
.hw_params = kmb_dai_hw_params,
+ .hw_free = kmb_dai_hw_free,
.prepare = kmb_dai_prepare,
.set_fmt = kmb_set_dai_fmt,
};
+static struct snd_soc_dai_driver intel_kmb_hdmi_dai[] = {
+ {
+ .name = "intel_kmb_hdmi_i2s",
+ .playback = {
+ .channels_min = 2,
+ .channels_max = 2,
+ .rates = SNDRV_PCM_RATE_48000,
+ .rate_min = 48000,
+ .rate_max = 48000,
+ .formats = (SNDRV_PCM_FMTBIT_S16_LE |
+ SNDRV_PCM_FMTBIT_S24_LE |
+ SNDRV_PCM_FMTBIT_IEC958_SUBFRAME_LE),
+ },
+ .ops = &kmb_dai_ops,
+ .probe = kmb_probe,
+ },
+};
+
static struct snd_soc_dai_driver intel_kmb_i2s_dai[] = {
{
.name = "intel_kmb_i2s",
@@ -607,6 +784,7 @@ static struct snd_soc_dai_driver intel_kmb_i2s_dai[] = {
SNDRV_PCM_FMTBIT_S16_LE),
},
.ops = &kmb_dai_ops,
+ .probe = kmb_probe,
},
};
@@ -626,21 +804,25 @@ static struct snd_soc_dai_driver intel_kmb_tdm_dai[] = {
SNDRV_PCM_FMTBIT_S16_LE),
},
.ops = &kmb_dai_ops,
+ .probe = kmb_probe,
},
};
static const struct of_device_id kmb_plat_of_match[] = {
{ .compatible = "intel,keembay-i2s", .data = &intel_kmb_i2s_dai},
+ { .compatible = "intel,keembay-hdmi-i2s", .data = &intel_kmb_hdmi_dai},
{ .compatible = "intel,keembay-tdm", .data = &intel_kmb_tdm_dai},
{}
};
static int kmb_plat_dai_probe(struct platform_device *pdev)
{
+ struct device_node *np = pdev->dev.of_node;
struct snd_soc_dai_driver *kmb_i2s_dai;
const struct of_device_id *match;
struct device *dev = &pdev->dev;
struct kmb_i2s_info *kmb_i2s;
+ struct resource *res;
int ret, irq;
u32 comp1_reg;
@@ -682,7 +864,7 @@ static int kmb_plat_dai_probe(struct platform_device *pdev)
return PTR_ERR(kmb_i2s->clk_i2s);
}
- kmb_i2s->i2s_base = devm_platform_ioremap_resource(pdev, 0);
+ kmb_i2s->i2s_base = devm_platform_get_and_ioremap_resource(pdev, 0, &res);
if (IS_ERR(kmb_i2s->i2s_base))
return PTR_ERR(kmb_i2s->i2s_base);
@@ -692,22 +874,38 @@ static int kmb_plat_dai_probe(struct platform_device *pdev)
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,
- kmb_i2s_dai, 1);
+ kmb_i2s->use_pio = !(of_property_read_bool(np, "dmas"));
+
+ if (kmb_i2s->use_pio) {
+ 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;
+ }
+ }
+ ret = devm_snd_soc_register_component(dev, &kmb_component,
+ kmb_i2s_dai, 1);
+ } else {
+ kmb_i2s->play_dma_data.addr = res->start + I2S_TXDMA;
+ kmb_i2s->capture_dma_data.addr = res->start + I2S_RXDMA;
+ ret = snd_dmaengine_pcm_register(&pdev->dev,
+ NULL, 0);
+ if (ret) {
+ dev_err(&pdev->dev, "could not register dmaengine: %d\n",
+ ret);
+ return ret;
+ }
+ ret = devm_snd_soc_register_component(dev, &kmb_component_dma,
+ kmb_i2s_dai, 1);
+ }
+
if (ret) {
dev_err(dev, "not able to register dai\n");
return ret;
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