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246 lines
6.4 KiB
246 lines
6.4 KiB
// SPDX-License-Identifier: GPL-2.0-or-later |
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/* |
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* ALSA SoC Voice Codec Interface for TI DAVINCI processor |
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* |
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* Copyright (C) 2010 Texas Instruments. |
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* |
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* Author: Miguel Aguilar <[email protected]> |
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*/ |
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#include <linux/init.h> |
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#include <linux/module.h> |
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#include <linux/device.h> |
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#include <linux/delay.h> |
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#include <linux/slab.h> |
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#include <linux/io.h> |
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#include <linux/mfd/davinci_voicecodec.h> |
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#include <sound/core.h> |
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#include <sound/pcm.h> |
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#include <sound/pcm_params.h> |
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#include <sound/initval.h> |
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#include <sound/soc.h> |
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#include <sound/dmaengine_pcm.h> |
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#include "edma-pcm.h" |
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#include "davinci-i2s.h" |
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#define MOD_REG_BIT(val, mask, set) do { \ |
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if (set) { \ |
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val |= mask; \ |
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} else { \ |
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val &= ~mask; \ |
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} \ |
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} while (0) |
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struct davinci_vcif_dev { |
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struct davinci_vc *davinci_vc; |
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struct snd_dmaengine_dai_dma_data dma_data[2]; |
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int dma_request[2]; |
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}; |
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static void davinci_vcif_start(struct snd_pcm_substream *substream) |
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{ |
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struct snd_soc_pcm_runtime *rtd = asoc_substream_to_rtd(substream); |
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struct davinci_vcif_dev *davinci_vcif_dev = |
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snd_soc_dai_get_drvdata(asoc_rtd_to_cpu(rtd, 0)); |
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struct davinci_vc *davinci_vc = davinci_vcif_dev->davinci_vc; |
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u32 w; |
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/* Start the sample generator and enable transmitter/receiver */ |
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w = readl(davinci_vc->base + DAVINCI_VC_CTRL); |
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if (substream->stream == SNDRV_PCM_STREAM_PLAYBACK) |
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MOD_REG_BIT(w, DAVINCI_VC_CTRL_RSTDAC, 0); |
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else |
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MOD_REG_BIT(w, DAVINCI_VC_CTRL_RSTADC, 0); |
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writel(w, davinci_vc->base + DAVINCI_VC_CTRL); |
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} |
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static void davinci_vcif_stop(struct snd_pcm_substream *substream) |
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{ |
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struct snd_soc_pcm_runtime *rtd = asoc_substream_to_rtd(substream); |
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struct davinci_vcif_dev *davinci_vcif_dev = |
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snd_soc_dai_get_drvdata(asoc_rtd_to_cpu(rtd, 0)); |
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struct davinci_vc *davinci_vc = davinci_vcif_dev->davinci_vc; |
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u32 w; |
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/* Reset transmitter/receiver and sample rate/frame sync generators */ |
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w = readl(davinci_vc->base + DAVINCI_VC_CTRL); |
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if (substream->stream == SNDRV_PCM_STREAM_PLAYBACK) |
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MOD_REG_BIT(w, DAVINCI_VC_CTRL_RSTDAC, 1); |
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else |
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MOD_REG_BIT(w, DAVINCI_VC_CTRL_RSTADC, 1); |
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writel(w, davinci_vc->base + DAVINCI_VC_CTRL); |
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} |
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static int davinci_vcif_hw_params(struct snd_pcm_substream *substream, |
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struct snd_pcm_hw_params *params, |
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struct snd_soc_dai *dai) |
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{ |
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struct davinci_vcif_dev *davinci_vcif_dev = snd_soc_dai_get_drvdata(dai); |
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struct davinci_vc *davinci_vc = davinci_vcif_dev->davinci_vc; |
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u32 w; |
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/* Restart the codec before setup */ |
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davinci_vcif_stop(substream); |
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davinci_vcif_start(substream); |
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/* General line settings */ |
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writel(DAVINCI_VC_CTRL_MASK, davinci_vc->base + DAVINCI_VC_CTRL); |
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writel(DAVINCI_VC_INT_MASK, davinci_vc->base + DAVINCI_VC_INTCLR); |
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writel(DAVINCI_VC_INT_MASK, davinci_vc->base + DAVINCI_VC_INTEN); |
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w = readl(davinci_vc->base + DAVINCI_VC_CTRL); |
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/* Determine xfer data type */ |
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switch (params_format(params)) { |
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case SNDRV_PCM_FORMAT_U8: |
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MOD_REG_BIT(w, DAVINCI_VC_CTRL_RD_BITS_8 | |
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DAVINCI_VC_CTRL_RD_UNSIGNED | |
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DAVINCI_VC_CTRL_WD_BITS_8 | |
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DAVINCI_VC_CTRL_WD_UNSIGNED, 1); |
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break; |
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case SNDRV_PCM_FORMAT_S8: |
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MOD_REG_BIT(w, DAVINCI_VC_CTRL_RD_BITS_8 | |
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DAVINCI_VC_CTRL_WD_BITS_8, 1); |
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MOD_REG_BIT(w, DAVINCI_VC_CTRL_RD_UNSIGNED | |
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DAVINCI_VC_CTRL_WD_UNSIGNED, 0); |
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break; |
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case SNDRV_PCM_FORMAT_S16_LE: |
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MOD_REG_BIT(w, DAVINCI_VC_CTRL_RD_BITS_8 | |
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DAVINCI_VC_CTRL_RD_UNSIGNED | |
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DAVINCI_VC_CTRL_WD_BITS_8 | |
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DAVINCI_VC_CTRL_WD_UNSIGNED, 0); |
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break; |
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default: |
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printk(KERN_WARNING "davinci-vcif: unsupported PCM format"); |
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return -EINVAL; |
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} |
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writel(w, davinci_vc->base + DAVINCI_VC_CTRL); |
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return 0; |
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} |
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static int davinci_vcif_trigger(struct snd_pcm_substream *substream, int cmd, |
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struct snd_soc_dai *dai) |
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{ |
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int ret = 0; |
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switch (cmd) { |
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case SNDRV_PCM_TRIGGER_START: |
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case SNDRV_PCM_TRIGGER_RESUME: |
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case SNDRV_PCM_TRIGGER_PAUSE_RELEASE: |
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davinci_vcif_start(substream); |
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break; |
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case SNDRV_PCM_TRIGGER_STOP: |
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case SNDRV_PCM_TRIGGER_SUSPEND: |
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case SNDRV_PCM_TRIGGER_PAUSE_PUSH: |
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davinci_vcif_stop(substream); |
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break; |
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default: |
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ret = -EINVAL; |
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} |
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return ret; |
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} |
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#define DAVINCI_VCIF_RATES SNDRV_PCM_RATE_8000_48000 |
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static const struct snd_soc_dai_ops davinci_vcif_dai_ops = { |
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.trigger = davinci_vcif_trigger, |
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.hw_params = davinci_vcif_hw_params, |
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}; |
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static int davinci_vcif_dai_probe(struct snd_soc_dai *dai) |
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{ |
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struct davinci_vcif_dev *dev = snd_soc_dai_get_drvdata(dai); |
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dai->playback_dma_data = &dev->dma_data[SNDRV_PCM_STREAM_PLAYBACK]; |
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dai->capture_dma_data = &dev->dma_data[SNDRV_PCM_STREAM_CAPTURE]; |
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return 0; |
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} |
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static struct snd_soc_dai_driver davinci_vcif_dai = { |
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.probe = davinci_vcif_dai_probe, |
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.playback = { |
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.channels_min = 1, |
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.channels_max = 2, |
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.rates = DAVINCI_VCIF_RATES, |
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.formats = SNDRV_PCM_FMTBIT_S16_LE,}, |
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.capture = { |
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.channels_min = 1, |
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.channels_max = 2, |
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.rates = DAVINCI_VCIF_RATES, |
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.formats = SNDRV_PCM_FMTBIT_S16_LE,}, |
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.ops = &davinci_vcif_dai_ops, |
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}; |
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static const struct snd_soc_component_driver davinci_vcif_component = { |
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.name = "davinci-vcif", |
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}; |
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static int davinci_vcif_probe(struct platform_device *pdev) |
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{ |
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struct davinci_vc *davinci_vc = pdev->dev.platform_data; |
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struct davinci_vcif_dev *davinci_vcif_dev; |
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int ret; |
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davinci_vcif_dev = devm_kzalloc(&pdev->dev, |
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sizeof(struct davinci_vcif_dev), |
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GFP_KERNEL); |
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if (!davinci_vcif_dev) |
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return -ENOMEM; |
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/* DMA tx params */ |
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davinci_vcif_dev->davinci_vc = davinci_vc; |
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davinci_vcif_dev->dma_data[SNDRV_PCM_STREAM_PLAYBACK].filter_data = |
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&davinci_vc->davinci_vcif.dma_tx_channel; |
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davinci_vcif_dev->dma_data[SNDRV_PCM_STREAM_PLAYBACK].addr = |
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davinci_vc->davinci_vcif.dma_tx_addr; |
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/* DMA rx params */ |
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davinci_vcif_dev->dma_data[SNDRV_PCM_STREAM_CAPTURE].filter_data = |
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&davinci_vc->davinci_vcif.dma_rx_channel; |
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davinci_vcif_dev->dma_data[SNDRV_PCM_STREAM_CAPTURE].addr = |
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davinci_vc->davinci_vcif.dma_rx_addr; |
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dev_set_drvdata(&pdev->dev, davinci_vcif_dev); |
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ret = devm_snd_soc_register_component(&pdev->dev, |
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&davinci_vcif_component, |
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&davinci_vcif_dai, 1); |
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if (ret != 0) { |
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dev_err(&pdev->dev, "could not register dai\n"); |
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return ret; |
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} |
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ret = edma_pcm_platform_register(&pdev->dev); |
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if (ret) { |
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dev_err(&pdev->dev, "register PCM failed: %d\n", ret); |
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return ret; |
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} |
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return 0; |
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} |
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static struct platform_driver davinci_vcif_driver = { |
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.probe = davinci_vcif_probe, |
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.driver = { |
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.name = "davinci-vcif", |
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}, |
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}; |
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module_platform_driver(davinci_vcif_driver); |
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MODULE_AUTHOR("Miguel Aguilar"); |
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MODULE_DESCRIPTION("Texas Instruments DaVinci ASoC Voice Codec Interface"); |
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MODULE_LICENSE("GPL");
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