From: Srinivasa Rao Mandadapu srivasam@codeaurora.org
Add lpass cpu driver to support audio over codec dma for ADSP bypass usecase.
Signed-off-by: Srinivasa Rao Mandadapu srivasam@codeaurora.org Co-developed-by: Venkata Prasad Potturu potturu@codeaurora.org Signed-off-by: Venkata Prasad Potturu potturu@codeaurora.org --- sound/soc/qcom/lpass-cdc-dma.c | 275 +++++++++++++++++++++++++++++++++++++++++ sound/soc/qcom/lpass.h | 1 + 2 files changed, 276 insertions(+) create mode 100644 sound/soc/qcom/lpass-cdc-dma.c
diff --git a/sound/soc/qcom/lpass-cdc-dma.c b/sound/soc/qcom/lpass-cdc-dma.c new file mode 100644 index 0000000..51cd7ea --- /dev/null +++ b/sound/soc/qcom/lpass-cdc-dma.c @@ -0,0 +1,275 @@ +// SPDX-License-Identifier: GPL-2.0-only +/* + * Copyright (c) 2021 The Linux Foundation. All rights reserved. + * + * lpass-cdc-dma.c -- ALSA SoC CDC DMA CPU DAI driver for QTi LPASS + */ + +#include <linux/clk.h> +#include <linux/module.h> +#include <sound/soc.h> +#include <sound/soc-dai.h> + +#include "lpass-lpaif-reg.h" +#include "lpass.h" + +enum codec_dma_interfaces { + LPASS_CDC_DMA_INTERFACE1 = 1, + LPASS_CDC_DMA_INTERFACE2, + LPASS_CDC_DMA_INTERFACE3, + LPASS_CDC_DMA_INTERFACE4, + LPASS_CDC_DMA_INTERFACE5, + LPASS_CDC_DMA_INTERFACE6, + LPASS_CDC_DMA_INTERFACE7, + LPASS_CDC_DMA_INTERFACE8, + LPASS_CDC_DMA_INTERFACE9, + LPASS_CDC_DMA_INTERFACE10, +}; + +static void __lpass_get_dmactl_handle(struct snd_pcm_substream *substream, struct snd_soc_dai *dai, + struct lpaif_dmactl **dmactl, int *id) +{ + struct snd_soc_pcm_runtime *soc_runtime = asoc_substream_to_rtd(substream); + struct snd_soc_dai *cpu_dai = asoc_rtd_to_cpu(soc_runtime, 0); + struct lpass_data *drvdata = snd_soc_dai_get_drvdata(dai); + struct snd_pcm_runtime *rt = substream->runtime; + struct lpass_pcm_data *pcm_data = rt->private_data; + struct lpass_variant *v = drvdata->variant; + unsigned int dai_id = cpu_dai->driver->id; + + switch (dai_id) { + case LPASS_CDC_DMA_RX0 ... LPASS_CDC_DMA_RX9: + *dmactl = drvdata->rxtx_rd_dmactl; + *id = pcm_data->dma_ch; + break; + case LPASS_CDC_DMA_TX0 ... LPASS_CDC_DMA_TX8: + *dmactl = drvdata->rxtx_wr_dmactl; + *id = pcm_data->dma_ch - v->rxtx_wrdma_channel_start; + break; + case LPASS_CDC_DMA_VA_TX0 ... LPASS_CDC_DMA_VA_TX8: + *dmactl = drvdata->va_wr_dmactl; + *id = pcm_data->dma_ch - v->va_wrdma_channel_start; + break; + default: + dev_err(soc_runtime->dev, "invalid dai id for dma ctl: %d\n", dai_id); + break; + } +} + +static int __lpass_get_codec_dma_intf_type(int dai_id) +{ + int ret; + + switch (dai_id) { + case LPASS_CDC_DMA_RX0: + case LPASS_CDC_DMA_TX0: + case LPASS_CDC_DMA_VA_TX0: + ret = LPASS_CDC_DMA_INTERFACE1; + break; + case LPASS_CDC_DMA_RX1: + case LPASS_CDC_DMA_TX1: + case LPASS_CDC_DMA_VA_TX1: + ret = LPASS_CDC_DMA_INTERFACE2; + break; + case LPASS_CDC_DMA_RX2: + case LPASS_CDC_DMA_TX2: + case LPASS_CDC_DMA_VA_TX2: + ret = LPASS_CDC_DMA_INTERFACE3; + break; + case LPASS_CDC_DMA_RX3: + case LPASS_CDC_DMA_TX3: + case LPASS_CDC_DMA_VA_TX3: + ret = LPASS_CDC_DMA_INTERFACE4; + break; + case LPASS_CDC_DMA_RX4: + case LPASS_CDC_DMA_TX4: + case LPASS_CDC_DMA_VA_TX4: + ret = LPASS_CDC_DMA_INTERFACE5; + break; + case LPASS_CDC_DMA_RX5: + case LPASS_CDC_DMA_TX5: + case LPASS_CDC_DMA_VA_TX5: + ret = LPASS_CDC_DMA_INTERFACE6; + break; + case LPASS_CDC_DMA_RX6: + case LPASS_CDC_DMA_TX6: + case LPASS_CDC_DMA_VA_TX6: + ret = LPASS_CDC_DMA_INTERFACE7; + break; + case LPASS_CDC_DMA_RX7: + case LPASS_CDC_DMA_TX7: + case LPASS_CDC_DMA_VA_TX7: + ret = LPASS_CDC_DMA_INTERFACE8; + break; + case LPASS_CDC_DMA_RX8: + case LPASS_CDC_DMA_TX8: + case LPASS_CDC_DMA_VA_TX8: + ret = LPASS_CDC_DMA_INTERFACE9; + break; + case LPASS_CDC_DMA_RX9: + ret = LPASS_CDC_DMA_INTERFACE10; + break; + default: + ret = -EINVAL; + break; + } + return ret; +} + +static int __lpass_platform_codec_intf_init(struct snd_soc_dai *dai, + struct snd_pcm_substream *substream) +{ + struct snd_soc_pcm_runtime *soc_runtime = asoc_substream_to_rtd(substream); + struct snd_soc_dai *cpu_dai = asoc_rtd_to_cpu(soc_runtime, 0); + struct lpaif_dmactl *dmactl = NULL; + struct device *dev = soc_runtime->dev; + int ret, id, codec_intf; + unsigned int dai_id = cpu_dai->driver->id; + + codec_intf = __lpass_get_codec_dma_intf_type(dai_id); + if (codec_intf < 0) { + dev_err(dev, "failed to get codec_intf: %d\n", codec_intf); + return codec_intf; + } + + __lpass_get_dmactl_handle(substream, dai, &dmactl, &id); + if (!dmactl) { + dev_err(dev, "failed to get dmactl handle for dai_id: %d\n", dai_id); + return -EINVAL; + } + + ret = regmap_fields_write(dmactl->codec_intf, id, codec_intf); + if (ret) { + dev_err(dev, "error writing to dmactl codec_intf reg field: %d\n", ret); + return ret; + } + ret = regmap_fields_write(dmactl->codec_fs_sel, id, 0x0); + if (ret) { + dev_err(dev, "error writing to dmactl codec_fs_sel reg field: %d\n", ret); + return ret; + } + ret = regmap_fields_write(dmactl->codec_fs_delay, id, 0x0); + if (ret) { + dev_err(dev, "error writing to dmactl codec_fs_delay reg field: %d\n", ret); + return ret; + } + ret = regmap_fields_write(dmactl->codec_pack, id, 0x1); + if (ret) { + dev_err(dev, "error writing to dmactl codec_pack reg field: %d\n", ret); + return ret; + } + ret = regmap_fields_write(dmactl->codec_enable, id, LPAIF_DMACTL_ENABLE_ON); + if (ret) { + dev_err(dev, "error writing to dmactl codec_enable reg field: %d\n", ret); + return ret; + } + return 0; +} + +static int lpass_cdc_dma_daiops_startup(struct snd_pcm_substream *substream, + struct snd_soc_dai *dai) +{ + struct lpass_data *drvdata = snd_soc_dai_get_drvdata(dai); + + return clk_bulk_prepare_enable(drvdata->cdc_num_clks, drvdata->cdc_clks); +} + +static void lpass_cdc_dma_daiops_shutdown(struct snd_pcm_substream *substream, + struct snd_soc_dai *dai) +{ + struct lpass_data *drvdata = snd_soc_dai_get_drvdata(dai); + + clk_bulk_disable_unprepare(drvdata->cdc_num_clks, drvdata->cdc_clks); +} + +static int lpass_cdc_dma_daiops_hw_params(struct snd_pcm_substream *substream, + struct snd_pcm_hw_params *params, + struct snd_soc_dai *dai) +{ + struct snd_soc_pcm_runtime *soc_runtime = asoc_substream_to_rtd(substream); + struct lpaif_dmactl *dmactl = NULL; + unsigned int ret, regval; + unsigned int channels = params_channels(params); + int id; + + switch (channels) { + case 1: + regval = LPASS_CDC_DMA_INTF_ONE_CHANNEL; + break; + case 2: + regval = LPASS_CDC_DMA_INTF_TWO_CHANNEL; + break; + case 4: + regval = LPASS_CDC_DMA_INTF_FOUR_CHANNEL; + break; + case 6: + regval = LPASS_CDC_DMA_INTF_SIX_CHANNEL; + break; + case 8: + regval = LPASS_CDC_DMA_INTF_EIGHT_CHANNEL; + break; + default: + dev_err(soc_runtime->dev, "invalid PCM config\n"); + return -EINVAL; + } + + __lpass_get_dmactl_handle(substream, dai, &dmactl, &id); + if (!dmactl) { + dev_err(soc_runtime->dev, "failed to get dmactl handle\n"); + return -EINVAL; + } + ret = regmap_fields_write(dmactl->codec_channel, id, regval); + if (ret) { + dev_err(soc_runtime->dev, + "error writing to dmactl codec_channel reg field: %d\n", ret); + return ret; + } + return 0; +} + +static int lpass_cdc_dma_daiops_trigger(struct snd_pcm_substream *substream, + int cmd, struct snd_soc_dai *dai) +{ + struct snd_soc_pcm_runtime *soc_runtime = asoc_substream_to_rtd(substream); + struct lpaif_dmactl *dmactl; + int ret = 0, id; + + switch (cmd) { + case SNDRV_PCM_TRIGGER_START: + case SNDRV_PCM_TRIGGER_RESUME: + case SNDRV_PCM_TRIGGER_PAUSE_RELEASE: + __lpass_platform_codec_intf_init(dai, substream); + break; + case SNDRV_PCM_TRIGGER_STOP: + case SNDRV_PCM_TRIGGER_SUSPEND: + case SNDRV_PCM_TRIGGER_PAUSE_PUSH: + __lpass_get_dmactl_handle(substream, dai, &dmactl, &id); + if (!dmactl) { + dev_err(soc_runtime->dev, "failed to get dmactl handle\n"); + return -EINVAL; + } + ret = regmap_fields_write(dmactl->codec_enable, id, LPAIF_DMACTL_ENABLE_OFF); + if (ret) { + dev_err(soc_runtime->dev, + "error writing to dmactl codec_enable reg: %d\n", ret); + return ret; + } + break; + default: + ret = -EINVAL; + dev_err(soc_runtime->dev, "%s: invalid %d interface\n", __func__, cmd); + break; + } + return ret; +} + +const struct snd_soc_dai_ops asoc_qcom_lpass_cdc_dma_dai_ops = { + .startup = lpass_cdc_dma_daiops_startup, + .shutdown = lpass_cdc_dma_daiops_shutdown, + .hw_params = lpass_cdc_dma_daiops_hw_params, + .trigger = lpass_cdc_dma_daiops_trigger, +}; +EXPORT_SYMBOL_GPL(asoc_qcom_lpass_cdc_dma_dai_ops); + +MODULE_DESCRIPTION("QTi LPASS CDC DMA Driver"); +MODULE_LICENSE("GPL"); diff --git a/sound/soc/qcom/lpass.h b/sound/soc/qcom/lpass.h index 4142f12..413cead 100644 --- a/sound/soc/qcom/lpass.h +++ b/sound/soc/qcom/lpass.h @@ -403,5 +403,6 @@ int asoc_qcom_lpass_cpu_dai_probe(struct snd_soc_dai *dai); extern const struct snd_soc_dai_ops asoc_qcom_lpass_cpu_dai_ops; int lpass_cpu_pcm_new(struct snd_soc_pcm_runtime *rtd, struct snd_soc_dai *dai); +extern const struct snd_soc_dai_ops asoc_qcom_lpass_cdc_dma_dai_ops;
#endif /* __LPASS_H__ */