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