[PATCH v3 09/15] ASoC: fsl-ssi: Add support for imx-pcm-fiq
Markus Pargmann
mpa at pengutronix.de
Sun Apr 14 21:42:53 EST 2013
Add support for non-dma pcm for imx platforms with imx-pcm-fiq support.
Instead of imx-pcm-audio, in this case imx-pcm-fiq-audio device is added
and the SIER flags are set differently.
Signed-off-by: Markus Pargmann <mpa at pengutronix.de>
---
Notes:
Changes in v3:
- Rename bool "dma" to "use_dma"
sound/soc/fsl/fsl_ssi.c | 66 ++++++++++++++++++++++++++++++++++++++-----------
1 file changed, 52 insertions(+), 14 deletions(-)
diff --git a/sound/soc/fsl/fsl_ssi.c b/sound/soc/fsl/fsl_ssi.c
index 0f0bed6..6a9be9c 100644
--- a/sound/soc/fsl/fsl_ssi.c
+++ b/sound/soc/fsl/fsl_ssi.c
@@ -121,12 +121,14 @@ struct fsl_ssi_private {
bool new_binding;
bool ssi_on_imx;
+ bool use_dma;
struct clk *clk;
struct platform_device *imx_pcm_pdev;
struct snd_dmaengine_dai_dma_data dma_params_tx;
struct snd_dmaengine_dai_dma_data dma_params_rx;
struct imx_dma_data filter_data_tx;
struct imx_dma_data filter_data_rx;
+ struct imx_pcm_fiq_params fiq_params;
struct {
unsigned int rfrc;
@@ -356,7 +358,12 @@ static int fsl_ssi_startup(struct snd_pcm_substream *substream,
*/
/* Enable the interrupts and DMA requests */
- write_ssi(SIER_FLAGS, &ssi->sier);
+ if (ssi_private->use_dma)
+ write_ssi(SIER_FLAGS, &ssi->sier);
+ else
+ write_ssi(CCSR_SSI_SIER_TIE | CCSR_SSI_SIER_TFE0_EN |
+ CCSR_SSI_SIER_RIE |
+ CCSR_SSI_SIER_RFF0_EN, &ssi->sier);
/*
* Set the watermark for transmit FIFI 0 and receive FIFO 0. We
@@ -550,7 +557,7 @@ static int fsl_ssi_dai_probe(struct snd_soc_dai *dai)
{
struct fsl_ssi_private *ssi_private = snd_soc_dai_get_drvdata(dai);
- if (ssi_private->ssi_on_imx) {
+ if (ssi_private->ssi_on_imx && ssi_private->use_dma) {
dai->playback_dma_data = &ssi_private->dma_params_tx;
dai->capture_dma_data = &ssi_private->dma_params_rx;
}
@@ -695,6 +702,8 @@ static int fsl_ssi_probe(struct platform_device *pdev)
sizeof(fsl_ssi_dai_template));
ssi_private->cpu_dai_drv.name = ssi_private->name;
+ ssi_private->use_dma = !of_property_read_bool(np, "fsl,imx-fiq");
+
/* Get the addresses and IRQ */
ret = of_address_to_resource(np, 0, &res);
if (ret) {
@@ -716,12 +725,15 @@ static int fsl_ssi_probe(struct platform_device *pdev)
goto error_iomap;
}
- /* The 'name' should not have any slashes in it. */
- ret = request_irq(ssi_private->irq, fsl_ssi_isr, 0, ssi_private->name,
- ssi_private);
- if (ret < 0) {
- dev_err(&pdev->dev, "could not claim irq %u\n", ssi_private->irq);
- goto error_irqmap;
+ if (ssi_private->use_dma) {
+ /* The 'name' should not have any slashes in it. */
+ ret = request_irq(ssi_private->irq, fsl_ssi_isr, 0,
+ ssi_private->name, ssi_private);
+ if (ret < 0) {
+ dev_err(&pdev->dev, "could not claim irq %u\n",
+ ssi_private->irq);
+ goto error_irqmap;
+ }
}
/* Are the RX and the TX clocks locked? */
@@ -770,7 +782,7 @@ static int fsl_ssi_probe(struct platform_device *pdev)
*/
ret = of_property_read_u32_array(pdev->dev.of_node,
"fsl,ssi-dma-events", dma_events, 2);
- if (ret) {
+ if (ret && !ssi_private->use_dma) {
dev_err(&pdev->dev, "could not get dma events\n");
goto error_clk;
}
@@ -809,12 +821,38 @@ static int fsl_ssi_probe(struct platform_device *pdev)
}
if (ssi_private->ssi_on_imx) {
- ssi_private->imx_pcm_pdev =
- platform_device_register_simple("imx-pcm-audio",
+ if (!ssi_private->use_dma) {
+ ssi_private->imx_pcm_pdev = platform_device_alloc(
+ "imx-fiq-pcm-audio",
+ pdev->id);
+ if (!ssi_private->imx_pcm_pdev) {
+ ret = -ENOMEM;
+ goto error_dev;
+ }
+
+ ssi_private->fiq_params.irq = ssi_private->irq;
+ ssi_private->fiq_params.base = ssi_private->ssi;
+ ssi_private->fiq_params.dma_params_rx =
+ &ssi_private->dma_params_rx;
+ ssi_private->fiq_params.dma_params_tx =
+ &ssi_private->dma_params_tx;
+
+ platform_set_drvdata(ssi_private->imx_pcm_pdev,
+ &ssi_private->fiq_params);
+ ret = platform_device_add(ssi_private->imx_pcm_pdev);
+ if (ret) {
+ dev_err(&pdev->dev, "Failed to add imx-fiq-pcm-audio device\n");
+ platform_device_put(ssi_private->imx_pcm_pdev);
+ goto error_dev;
+ }
+ } else {
+ ssi_private->imx_pcm_pdev =
+ platform_device_register_simple("imx-pcm-audio",
-1, NULL, 0);
- if (IS_ERR(ssi_private->imx_pcm_pdev)) {
- ret = PTR_ERR(ssi_private->imx_pcm_pdev);
- goto error_dev;
+ if (IS_ERR(ssi_private->imx_pcm_pdev)) {
+ ret = PTR_ERR(ssi_private->imx_pcm_pdev);
+ goto error_dev;
+ }
}
}
--
1.8.1.5
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