From ace9429bb58fd418f0c81d4c2835699bddf6bde6 Mon Sep 17 00:00:00 2001 From: Daniel Baumann Date: Thu, 11 Apr 2024 10:27:49 +0200 Subject: Adding upstream version 6.6.15. Signed-off-by: Daniel Baumann --- sound/soc/fsl/fsl_asrc_dma.c | 464 +++++++++++++++++++++++++++++++++++++++++++ 1 file changed, 464 insertions(+) create mode 100644 sound/soc/fsl/fsl_asrc_dma.c (limited to 'sound/soc/fsl/fsl_asrc_dma.c') diff --git a/sound/soc/fsl/fsl_asrc_dma.c b/sound/soc/fsl/fsl_asrc_dma.c new file mode 100644 index 0000000000..05a7d1588d --- /dev/null +++ b/sound/soc/fsl/fsl_asrc_dma.c @@ -0,0 +1,464 @@ +// SPDX-License-Identifier: GPL-2.0 +// +// Freescale ASRC ALSA SoC Platform (DMA) driver +// +// Copyright (C) 2014 Freescale Semiconductor, Inc. +// +// Author: Nicolin Chen + +#include +#include +#include +#include +#include + +#include "fsl_asrc_common.h" + +#define FSL_ASRC_DMABUF_SIZE (256 * 1024) + +static struct snd_pcm_hardware snd_imx_hardware = { + .info = SNDRV_PCM_INFO_INTERLEAVED | + SNDRV_PCM_INFO_BLOCK_TRANSFER | + SNDRV_PCM_INFO_MMAP | + SNDRV_PCM_INFO_MMAP_VALID, + .buffer_bytes_max = FSL_ASRC_DMABUF_SIZE, + .period_bytes_min = 128, + .period_bytes_max = 65535, /* Limited by SDMA engine */ + .periods_min = 2, + .periods_max = 255, + .fifo_size = 0, +}; + +static bool filter(struct dma_chan *chan, void *param) +{ + if (!imx_dma_is_general_purpose(chan)) + return false; + + chan->private = param; + + return true; +} + +static void fsl_asrc_dma_complete(void *arg) +{ + struct snd_pcm_substream *substream = arg; + struct snd_pcm_runtime *runtime = substream->runtime; + struct fsl_asrc_pair *pair = runtime->private_data; + + pair->pos += snd_pcm_lib_period_bytes(substream); + if (pair->pos >= snd_pcm_lib_buffer_bytes(substream)) + pair->pos = 0; + + snd_pcm_period_elapsed(substream); +} + +static int fsl_asrc_dma_prepare_and_submit(struct snd_pcm_substream *substream, + struct snd_soc_component *component) +{ + u8 dir = substream->stream == SNDRV_PCM_STREAM_PLAYBACK ? OUT : IN; + struct snd_pcm_runtime *runtime = substream->runtime; + struct fsl_asrc_pair *pair = runtime->private_data; + struct device *dev = component->dev; + unsigned long flags = DMA_CTRL_ACK; + + /* Prepare and submit Front-End DMA channel */ + if (!substream->runtime->no_period_wakeup) + flags |= DMA_PREP_INTERRUPT; + + pair->pos = 0; + pair->desc[!dir] = dmaengine_prep_dma_cyclic( + pair->dma_chan[!dir], runtime->dma_addr, + snd_pcm_lib_buffer_bytes(substream), + snd_pcm_lib_period_bytes(substream), + dir == OUT ? DMA_MEM_TO_DEV : DMA_DEV_TO_MEM, flags); + if (!pair->desc[!dir]) { + dev_err(dev, "failed to prepare slave DMA for Front-End\n"); + return -ENOMEM; + } + + pair->desc[!dir]->callback = fsl_asrc_dma_complete; + pair->desc[!dir]->callback_param = substream; + + dmaengine_submit(pair->desc[!dir]); + + /* Prepare and submit Back-End DMA channel */ + pair->desc[dir] = dmaengine_prep_dma_cyclic( + pair->dma_chan[dir], 0xffff, 64, 64, DMA_DEV_TO_DEV, 0); + if (!pair->desc[dir]) { + dev_err(dev, "failed to prepare slave DMA for Back-End\n"); + return -ENOMEM; + } + + dmaengine_submit(pair->desc[dir]); + + return 0; +} + +static int fsl_asrc_dma_trigger(struct snd_soc_component *component, + struct snd_pcm_substream *substream, int cmd) +{ + struct snd_pcm_runtime *runtime = substream->runtime; + struct fsl_asrc_pair *pair = runtime->private_data; + int ret; + + switch (cmd) { + case SNDRV_PCM_TRIGGER_START: + case SNDRV_PCM_TRIGGER_RESUME: + case SNDRV_PCM_TRIGGER_PAUSE_RELEASE: + ret = fsl_asrc_dma_prepare_and_submit(substream, component); + if (ret) + return ret; + dma_async_issue_pending(pair->dma_chan[IN]); + dma_async_issue_pending(pair->dma_chan[OUT]); + break; + case SNDRV_PCM_TRIGGER_STOP: + case SNDRV_PCM_TRIGGER_SUSPEND: + case SNDRV_PCM_TRIGGER_PAUSE_PUSH: + dmaengine_terminate_async(pair->dma_chan[OUT]); + dmaengine_terminate_async(pair->dma_chan[IN]); + break; + default: + return -EINVAL; + } + + return 0; +} + +static int fsl_asrc_dma_hw_params(struct snd_soc_component *component, + struct snd_pcm_substream *substream, + struct snd_pcm_hw_params *params) +{ + enum dma_slave_buswidth buswidth = DMA_SLAVE_BUSWIDTH_2_BYTES; + enum sdma_peripheral_type be_peripheral_type = IMX_DMATYPE_SSI; + struct snd_soc_pcm_runtime *rtd = asoc_substream_to_rtd(substream); + bool tx = substream->stream == SNDRV_PCM_STREAM_PLAYBACK; + struct snd_dmaengine_dai_dma_data *dma_params_fe = NULL; + struct snd_dmaengine_dai_dma_data *dma_params_be = NULL; + struct snd_pcm_runtime *runtime = substream->runtime; + struct fsl_asrc_pair *pair = runtime->private_data; + struct dma_chan *tmp_chan = NULL, *be_chan = NULL; + struct snd_soc_component *component_be = NULL; + struct fsl_asrc *asrc = pair->asrc; + struct dma_slave_config config_fe = {}, config_be = {}; + struct sdma_peripheral_config audio_config; + enum asrc_pair_index index = pair->index; + struct device *dev = component->dev; + struct device_node *of_dma_node; + int stream = substream->stream; + struct imx_dma_data *tmp_data; + struct snd_soc_dpcm *dpcm; + struct device *dev_be; + u8 dir = tx ? OUT : IN; + dma_cap_mask_t mask; + int ret, width; + + /* Fetch the Back-End dma_data from DPCM */ + for_each_dpcm_be(rtd, stream, dpcm) { + struct snd_soc_pcm_runtime *be = dpcm->be; + struct snd_pcm_substream *substream_be; + struct snd_soc_dai *dai = asoc_rtd_to_cpu(be, 0); + + if (dpcm->fe != rtd) + continue; + + substream_be = snd_soc_dpcm_get_substream(be, stream); + dma_params_be = snd_soc_dai_get_dma_data(dai, substream_be); + dev_be = dai->dev; + break; + } + + if (!dma_params_be) { + dev_err(dev, "failed to get the substream of Back-End\n"); + return -EINVAL; + } + + /* Override dma_data of the Front-End and config its dmaengine */ + dma_params_fe = snd_soc_dai_get_dma_data(asoc_rtd_to_cpu(rtd, 0), substream); + dma_params_fe->addr = asrc->paddr + asrc->get_fifo_addr(!dir, index); + dma_params_fe->maxburst = dma_params_be->maxburst; + + pair->dma_chan[!dir] = asrc->get_dma_channel(pair, !dir); + if (!pair->dma_chan[!dir]) { + dev_err(dev, "failed to request DMA channel\n"); + return -EINVAL; + } + + ret = snd_dmaengine_pcm_prepare_slave_config(substream, params, &config_fe); + if (ret) { + dev_err(dev, "failed to prepare DMA config for Front-End\n"); + return ret; + } + + ret = dmaengine_slave_config(pair->dma_chan[!dir], &config_fe); + if (ret) { + dev_err(dev, "failed to config DMA channel for Front-End\n"); + return ret; + } + + /* Request and config DMA channel for Back-End */ + dma_cap_zero(mask); + dma_cap_set(DMA_SLAVE, mask); + dma_cap_set(DMA_CYCLIC, mask); + + /* + * The Back-End device might have already requested a DMA channel, + * so try to reuse it first, and then request a new one upon NULL. + */ + component_be = snd_soc_lookup_component_nolocked(dev_be, SND_DMAENGINE_PCM_DRV_NAME); + if (component_be) { + be_chan = soc_component_to_pcm(component_be)->chan[substream->stream]; + tmp_chan = be_chan; + } + if (!tmp_chan) { + tmp_chan = dma_request_chan(dev_be, tx ? "tx" : "rx"); + if (IS_ERR(tmp_chan)) { + dev_err(dev, "failed to request DMA channel for Back-End\n"); + return -EINVAL; + } + } + + /* + * An EDMA DEV_TO_DEV channel is fixed and bound with DMA event of each + * peripheral, unlike SDMA channel that is allocated dynamically. So no + * need to configure dma_request and dma_request2, but get dma_chan of + * Back-End device directly via dma_request_chan. + */ + if (!asrc->use_edma) { + /* Get DMA request of Back-End */ + tmp_data = tmp_chan->private; + pair->dma_data.dma_request = tmp_data->dma_request; + be_peripheral_type = tmp_data->peripheral_type; + if (!be_chan) + dma_release_channel(tmp_chan); + + /* Get DMA request of Front-End */ + tmp_chan = asrc->get_dma_channel(pair, dir); + tmp_data = tmp_chan->private; + pair->dma_data.dma_request2 = tmp_data->dma_request; + pair->dma_data.peripheral_type = tmp_data->peripheral_type; + pair->dma_data.priority = tmp_data->priority; + dma_release_channel(tmp_chan); + + of_dma_node = pair->dma_chan[!dir]->device->dev->of_node; + pair->dma_chan[dir] = + __dma_request_channel(&mask, filter, &pair->dma_data, + of_dma_node); + pair->req_dma_chan = true; + } else { + pair->dma_chan[dir] = tmp_chan; + /* Do not flag to release if we are reusing the Back-End one */ + pair->req_dma_chan = !be_chan; + } + + if (!pair->dma_chan[dir]) { + dev_err(dev, "failed to request DMA channel for Back-End\n"); + return -EINVAL; + } + + width = snd_pcm_format_physical_width(asrc->asrc_format); + if (width < 8 || width > 64) + return -EINVAL; + else if (width == 8) + buswidth = DMA_SLAVE_BUSWIDTH_1_BYTE; + else if (width == 16) + buswidth = DMA_SLAVE_BUSWIDTH_2_BYTES; + else if (width == 24) + buswidth = DMA_SLAVE_BUSWIDTH_3_BYTES; + else if (width <= 32) + buswidth = DMA_SLAVE_BUSWIDTH_4_BYTES; + else + buswidth = DMA_SLAVE_BUSWIDTH_8_BYTES; + + config_be.direction = DMA_DEV_TO_DEV; + config_be.src_addr_width = buswidth; + config_be.src_maxburst = dma_params_be->maxburst; + config_be.dst_addr_width = buswidth; + config_be.dst_maxburst = dma_params_be->maxburst; + + memset(&audio_config, 0, sizeof(audio_config)); + config_be.peripheral_config = &audio_config; + config_be.peripheral_size = sizeof(audio_config); + + if (tx && (be_peripheral_type == IMX_DMATYPE_SSI_DUAL || + be_peripheral_type == IMX_DMATYPE_SPDIF)) + audio_config.n_fifos_dst = 2; + if (!tx && (be_peripheral_type == IMX_DMATYPE_SSI_DUAL || + be_peripheral_type == IMX_DMATYPE_SPDIF)) + audio_config.n_fifos_src = 2; + + if (tx) { + config_be.src_addr = asrc->paddr + asrc->get_fifo_addr(OUT, index); + config_be.dst_addr = dma_params_be->addr; + } else { + config_be.dst_addr = asrc->paddr + asrc->get_fifo_addr(IN, index); + config_be.src_addr = dma_params_be->addr; + } + + ret = dmaengine_slave_config(pair->dma_chan[dir], &config_be); + if (ret) { + dev_err(dev, "failed to config DMA channel for Back-End\n"); + if (pair->req_dma_chan) + dma_release_channel(pair->dma_chan[dir]); + return ret; + } + + return 0; +} + +static int fsl_asrc_dma_hw_free(struct snd_soc_component *component, + struct snd_pcm_substream *substream) +{ + bool tx = substream->stream == SNDRV_PCM_STREAM_PLAYBACK; + struct snd_pcm_runtime *runtime = substream->runtime; + struct fsl_asrc_pair *pair = runtime->private_data; + u8 dir = tx ? OUT : IN; + + if (pair->dma_chan[!dir]) + dma_release_channel(pair->dma_chan[!dir]); + + /* release dev_to_dev chan if we aren't reusing the Back-End one */ + if (pair->dma_chan[dir] && pair->req_dma_chan) + dma_release_channel(pair->dma_chan[dir]); + + pair->dma_chan[!dir] = NULL; + pair->dma_chan[dir] = NULL; + + return 0; +} + +static int fsl_asrc_dma_startup(struct snd_soc_component *component, + struct snd_pcm_substream *substream) +{ + bool tx = substream->stream == SNDRV_PCM_STREAM_PLAYBACK; + struct snd_soc_pcm_runtime *rtd = asoc_substream_to_rtd(substream); + struct snd_pcm_runtime *runtime = substream->runtime; + struct snd_dmaengine_dai_dma_data *dma_data; + struct device *dev = component->dev; + struct fsl_asrc *asrc = dev_get_drvdata(dev); + struct fsl_asrc_pair *pair; + struct dma_chan *tmp_chan = NULL; + u8 dir = tx ? OUT : IN; + bool release_pair = true; + int ret = 0; + + ret = snd_pcm_hw_constraint_integer(substream->runtime, + SNDRV_PCM_HW_PARAM_PERIODS); + if (ret < 0) { + dev_err(dev, "failed to set pcm hw params periods\n"); + return ret; + } + + pair = kzalloc(sizeof(*pair) + asrc->pair_priv_size, GFP_KERNEL); + if (!pair) + return -ENOMEM; + + pair->asrc = asrc; + pair->private = (void *)pair + sizeof(struct fsl_asrc_pair); + + runtime->private_data = pair; + + /* Request a dummy pair, which will be released later. + * Request pair function needs channel num as input, for this + * dummy pair, we just request "1" channel temporarily. + */ + ret = asrc->request_pair(1, pair); + if (ret < 0) { + dev_err(dev, "failed to request asrc pair\n"); + goto req_pair_err; + } + + /* Request a dummy dma channel, which will be released later. */ + tmp_chan = asrc->get_dma_channel(pair, dir); + if (!tmp_chan) { + dev_err(dev, "failed to get dma channel\n"); + ret = -EINVAL; + goto dma_chan_err; + } + + dma_data = snd_soc_dai_get_dma_data(asoc_rtd_to_cpu(rtd, 0), substream); + + /* Refine the snd_imx_hardware according to caps of DMA. */ + ret = snd_dmaengine_pcm_refine_runtime_hwparams(substream, + dma_data, + &snd_imx_hardware, + tmp_chan); + if (ret < 0) { + dev_err(dev, "failed to refine runtime hwparams\n"); + goto out; + } + + release_pair = false; + snd_soc_set_runtime_hwparams(substream, &snd_imx_hardware); + +out: + dma_release_channel(tmp_chan); + +dma_chan_err: + asrc->release_pair(pair); + +req_pair_err: + if (release_pair) + kfree(pair); + + return ret; +} + +static int fsl_asrc_dma_shutdown(struct snd_soc_component *component, + struct snd_pcm_substream *substream) +{ + struct snd_pcm_runtime *runtime = substream->runtime; + struct fsl_asrc_pair *pair = runtime->private_data; + struct fsl_asrc *asrc; + + if (!pair) + return 0; + + asrc = pair->asrc; + + if (asrc->pair[pair->index] == pair) + asrc->pair[pair->index] = NULL; + + kfree(pair); + + return 0; +} + +static snd_pcm_uframes_t +fsl_asrc_dma_pcm_pointer(struct snd_soc_component *component, + struct snd_pcm_substream *substream) +{ + struct snd_pcm_runtime *runtime = substream->runtime; + struct fsl_asrc_pair *pair = runtime->private_data; + + return bytes_to_frames(substream->runtime, pair->pos); +} + +static int fsl_asrc_dma_pcm_new(struct snd_soc_component *component, + struct snd_soc_pcm_runtime *rtd) +{ + struct snd_card *card = rtd->card->snd_card; + struct snd_pcm *pcm = rtd->pcm; + int ret; + + ret = dma_coerce_mask_and_coherent(card->dev, DMA_BIT_MASK(32)); + if (ret) { + dev_err(card->dev, "failed to set DMA mask\n"); + return ret; + } + + return snd_pcm_set_fixed_buffer_all(pcm, SNDRV_DMA_TYPE_DEV, + card->dev, FSL_ASRC_DMABUF_SIZE); +} + +struct snd_soc_component_driver fsl_asrc_component = { + .name = DRV_NAME, + .hw_params = fsl_asrc_dma_hw_params, + .hw_free = fsl_asrc_dma_hw_free, + .trigger = fsl_asrc_dma_trigger, + .open = fsl_asrc_dma_startup, + .close = fsl_asrc_dma_shutdown, + .pointer = fsl_asrc_dma_pcm_pointer, + .pcm_construct = fsl_asrc_dma_pcm_new, + .legacy_dai_naming = 1, +}; +EXPORT_SYMBOL_GPL(fsl_asrc_component); -- cgit v1.2.3