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138 lines
4.6 KiB
Diff
138 lines
4.6 KiB
Diff
From ad5d3e5a1218a599ec02c81a3bd599acedeea00f Mon Sep 17 00:00:00 2001
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From: Jyri Sarha <jsarha@ti.com>
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Date: Tue, 17 Sep 2013 12:09:30 +0300
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Subject: [PATCH 214/752] ASoC: davinci-mcasp: Extract DMA channels directly
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from DT
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Extract DMA channels directly from DT as they can not be found from
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platform resources anymore. This is a work-around until davinci audio
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driver is updated to use dmaengine.
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Signed-off-by: Jyri Sarha <jsarha@ti.com>
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---
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.../bindings/sound/davinci-mcasp-audio.txt | 5 +++
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include/linux/platform_data/davinci_asp.h | 2 +
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sound/soc/davinci/davinci-mcasp.c | 47 +++++++++++++-------
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3 files changed, 39 insertions(+), 15 deletions(-)
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diff --git a/Documentation/devicetree/bindings/sound/davinci-mcasp-audio.txt b/Documentation/devicetree/bindings/sound/davinci-mcasp-audio.txt
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index 63b67ae..68e0f47 100644
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--- a/Documentation/devicetree/bindings/sound/davinci-mcasp-audio.txt
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+++ b/Documentation/devicetree/bindings/sound/davinci-mcasp-audio.txt
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@@ -18,6 +18,11 @@ Required properties:
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- serial-dir : A list of serializer pin mode. The list number should be equal
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to "num-serializer" parameter. Each entry is a number indication
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serializer pin direction. (0 - INACTIVE, 1 - TX, 2 - RX)
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+- dmas: two element list of DMA controller phandles and DMA request line
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+ ordered pairs.
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+- dma-names: identifier string for each DMA request line in the dmas property.
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+ These strings correspond 1:1 with the ordered pairs in dmas. The dma
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+ identifiers must be "rx" and "tx".
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Optional properties:
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diff --git a/include/linux/platform_data/davinci_asp.h b/include/linux/platform_data/davinci_asp.h
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index 8db5ae0..689a856 100644
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--- a/include/linux/platform_data/davinci_asp.h
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+++ b/include/linux/platform_data/davinci_asp.h
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@@ -84,6 +84,8 @@ struct snd_platform_data {
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u8 version;
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u8 txnumevt;
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u8 rxnumevt;
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+ int tx_dma_channel;
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+ int rx_dma_channel;
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};
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enum {
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diff --git a/sound/soc/davinci/davinci-mcasp.c b/sound/soc/davinci/davinci-mcasp.c
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index a056fc5..acbf5f8 100644
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--- a/sound/soc/davinci/davinci-mcasp.c
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+++ b/sound/soc/davinci/davinci-mcasp.c
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@@ -1047,6 +1047,7 @@ static struct snd_platform_data *davinci_mcasp_set_pdata_from_of(
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struct snd_platform_data *pdata = NULL;
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const struct of_device_id *match =
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of_match_device(mcasp_dt_ids, &pdev->dev);
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+ struct of_phandle_args dma_spec;
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const u32 *of_serial_dir32;
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u8 *of_serial_dir;
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@@ -1109,6 +1110,28 @@ static struct snd_platform_data *davinci_mcasp_set_pdata_from_of(
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pdata->serial_dir = of_serial_dir;
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}
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+ ret = of_property_match_string(np, "dma-names", "tx");
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+ if (ret < 0)
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+ goto nodata;
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+
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+ ret = of_parse_phandle_with_args(np, "dmas", "#dma-cells", ret,
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+ &dma_spec);
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+ if (ret < 0)
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+ goto nodata;
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+
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+ pdata->tx_dma_channel = dma_spec.args[0];
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+
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+ ret = of_property_match_string(np, "dma-names", "rx");
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+ if (ret < 0)
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+ goto nodata;
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+
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+ ret = of_parse_phandle_with_args(np, "dmas", "#dma-cells", ret,
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+ &dma_spec);
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+ if (ret < 0)
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+ goto nodata;
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+
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+ pdata->rx_dma_channel = dma_spec.args[0];
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+
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ret = of_property_read_u32(np, "tx-num-evt", &val);
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if (ret >= 0)
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pdata->txnumevt = val;
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@@ -1139,7 +1162,7 @@ nodata:
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static int davinci_mcasp_probe(struct platform_device *pdev)
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{
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struct davinci_pcm_dma_params *dma_data;
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- struct resource *mem, *ioarea, *res;
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+ struct resource *mem, *ioarea, *res, *dma;
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struct snd_platform_data *pdata;
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struct davinci_audio_dev *dev;
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int ret;
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@@ -1213,15 +1236,11 @@ static int davinci_mcasp_probe(struct platform_device *pdev)
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dma_data->sram_size = pdata->sram_size_playback;
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dma_data->dma_addr = dma->start + pdata->tx_dma_offset;
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- /* first TX, then RX */
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res = platform_get_resource(pdev, IORESOURCE_DMA, 0);
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- if (!res) {
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- dev_err(&pdev->dev, "no DMA resource\n");
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- ret = -ENODEV;
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- goto err_release_clk;
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- }
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-
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- dma_data->channel = res->start;
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+ if (res)
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+ dma_data->channel = res->start;
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+ else
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+ dma_data->channel = pdata->tx_dma_channel;
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dma_data = &dev->dma_params[SNDRV_PCM_STREAM_CAPTURE];
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dma_data->asp_chan_q = pdata->asp_chan_q;
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@@ -1231,13 +1250,11 @@ static int davinci_mcasp_probe(struct platform_device *pdev)
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dma_data->dma_addr = dma->start + pdata->rx_dma_offset;
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res = platform_get_resource(pdev, IORESOURCE_DMA, 1);
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- if (!res) {
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- dev_err(&pdev->dev, "no DMA resource\n");
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- ret = -ENODEV;
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- goto err_release_clk;
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- }
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+ if (res)
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+ dma_data->channel = res->start;
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+ else
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+ dma_data->channel = pdata->rx_dma_channel;
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- dma_data->channel = res->start;
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dev_set_drvdata(&pdev->dev, dev);
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ret = snd_soc_register_component(&pdev->dev, &davinci_mcasp_component,
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&davinci_mcasp_dai[pdata->op_mode], 1);
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--
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1.7.10.4
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