12ba28053SFabio Estevam // SPDX-License-Identifier: GPL-2.0 22ba28053SFabio Estevam // 32ba28053SFabio Estevam // Freescale ASRC ALSA SoC Platform (DMA) driver 42ba28053SFabio Estevam // 52ba28053SFabio Estevam // Copyright (C) 2014 Freescale Semiconductor, Inc. 62ba28053SFabio Estevam // 72ba28053SFabio Estevam // Author: Nicolin Chen <nicoleotsuka@gmail.com> 83117bb31SNicolin Chen 93117bb31SNicolin Chen #include <linux/dma-mapping.h> 103117bb31SNicolin Chen #include <linux/module.h> 113117bb31SNicolin Chen #include <linux/platform_data/dma-imx.h> 123117bb31SNicolin Chen #include <sound/dmaengine_pcm.h> 133117bb31SNicolin Chen #include <sound/pcm_params.h> 143117bb31SNicolin Chen 153117bb31SNicolin Chen #include "fsl_asrc.h" 163117bb31SNicolin Chen 173117bb31SNicolin Chen #define FSL_ASRC_DMABUF_SIZE (256 * 1024) 183117bb31SNicolin Chen 19f77bb3b7SBhumika Goyal static const struct snd_pcm_hardware snd_imx_hardware = { 203117bb31SNicolin Chen .info = SNDRV_PCM_INFO_INTERLEAVED | 213117bb31SNicolin Chen SNDRV_PCM_INFO_BLOCK_TRANSFER | 223117bb31SNicolin Chen SNDRV_PCM_INFO_MMAP | 233117bb31SNicolin Chen SNDRV_PCM_INFO_MMAP_VALID | 243117bb31SNicolin Chen SNDRV_PCM_INFO_PAUSE | 253117bb31SNicolin Chen SNDRV_PCM_INFO_RESUME, 263117bb31SNicolin Chen .buffer_bytes_max = FSL_ASRC_DMABUF_SIZE, 273117bb31SNicolin Chen .period_bytes_min = 128, 283117bb31SNicolin Chen .period_bytes_max = 65535, /* Limited by SDMA engine */ 293117bb31SNicolin Chen .periods_min = 2, 303117bb31SNicolin Chen .periods_max = 255, 313117bb31SNicolin Chen .fifo_size = 0, 323117bb31SNicolin Chen }; 333117bb31SNicolin Chen 343117bb31SNicolin Chen static bool filter(struct dma_chan *chan, void *param) 353117bb31SNicolin Chen { 363117bb31SNicolin Chen if (!imx_dma_is_general_purpose(chan)) 373117bb31SNicolin Chen return false; 383117bb31SNicolin Chen 393117bb31SNicolin Chen chan->private = param; 403117bb31SNicolin Chen 413117bb31SNicolin Chen return true; 423117bb31SNicolin Chen } 433117bb31SNicolin Chen 443117bb31SNicolin Chen static void fsl_asrc_dma_complete(void *arg) 453117bb31SNicolin Chen { 463117bb31SNicolin Chen struct snd_pcm_substream *substream = arg; 473117bb31SNicolin Chen struct snd_pcm_runtime *runtime = substream->runtime; 483117bb31SNicolin Chen struct fsl_asrc_pair *pair = runtime->private_data; 493117bb31SNicolin Chen 503117bb31SNicolin Chen pair->pos += snd_pcm_lib_period_bytes(substream); 513117bb31SNicolin Chen if (pair->pos >= snd_pcm_lib_buffer_bytes(substream)) 523117bb31SNicolin Chen pair->pos = 0; 533117bb31SNicolin Chen 543117bb31SNicolin Chen snd_pcm_period_elapsed(substream); 553117bb31SNicolin Chen } 563117bb31SNicolin Chen 573117bb31SNicolin Chen static int fsl_asrc_dma_prepare_and_submit(struct snd_pcm_substream *substream) 583117bb31SNicolin Chen { 593117bb31SNicolin Chen u8 dir = substream->stream == SNDRV_PCM_STREAM_PLAYBACK ? OUT : IN; 603117bb31SNicolin Chen struct snd_soc_pcm_runtime *rtd = substream->private_data; 613117bb31SNicolin Chen struct snd_pcm_runtime *runtime = substream->runtime; 623117bb31SNicolin Chen struct fsl_asrc_pair *pair = runtime->private_data; 637f110661SKuninori Morimoto struct snd_soc_component *component = snd_soc_rtdcom_lookup(rtd, DRV_NAME); 647f110661SKuninori Morimoto struct device *dev = component->dev; 653117bb31SNicolin Chen unsigned long flags = DMA_CTRL_ACK; 663117bb31SNicolin Chen 673117bb31SNicolin Chen /* Prepare and submit Front-End DMA channel */ 683117bb31SNicolin Chen if (!substream->runtime->no_period_wakeup) 693117bb31SNicolin Chen flags |= DMA_PREP_INTERRUPT; 703117bb31SNicolin Chen 713117bb31SNicolin Chen pair->pos = 0; 723117bb31SNicolin Chen pair->desc[!dir] = dmaengine_prep_dma_cyclic( 733117bb31SNicolin Chen pair->dma_chan[!dir], runtime->dma_addr, 743117bb31SNicolin Chen snd_pcm_lib_buffer_bytes(substream), 753117bb31SNicolin Chen snd_pcm_lib_period_bytes(substream), 7624dbd9edSStefan Agner dir == OUT ? DMA_MEM_TO_DEV : DMA_DEV_TO_MEM, flags); 773117bb31SNicolin Chen if (!pair->desc[!dir]) { 783117bb31SNicolin Chen dev_err(dev, "failed to prepare slave DMA for Front-End\n"); 793117bb31SNicolin Chen return -ENOMEM; 803117bb31SNicolin Chen } 813117bb31SNicolin Chen 823117bb31SNicolin Chen pair->desc[!dir]->callback = fsl_asrc_dma_complete; 833117bb31SNicolin Chen pair->desc[!dir]->callback_param = substream; 843117bb31SNicolin Chen 853117bb31SNicolin Chen dmaengine_submit(pair->desc[!dir]); 863117bb31SNicolin Chen 873117bb31SNicolin Chen /* Prepare and submit Back-End DMA channel */ 883117bb31SNicolin Chen pair->desc[dir] = dmaengine_prep_dma_cyclic( 893117bb31SNicolin Chen pair->dma_chan[dir], 0xffff, 64, 64, DMA_DEV_TO_DEV, 0); 903117bb31SNicolin Chen if (!pair->desc[dir]) { 913117bb31SNicolin Chen dev_err(dev, "failed to prepare slave DMA for Back-End\n"); 923117bb31SNicolin Chen return -ENOMEM; 933117bb31SNicolin Chen } 943117bb31SNicolin Chen 953117bb31SNicolin Chen dmaengine_submit(pair->desc[dir]); 963117bb31SNicolin Chen 973117bb31SNicolin Chen return 0; 983117bb31SNicolin Chen } 993117bb31SNicolin Chen 1003117bb31SNicolin Chen static int fsl_asrc_dma_trigger(struct snd_pcm_substream *substream, int cmd) 1013117bb31SNicolin Chen { 1023117bb31SNicolin Chen struct snd_pcm_runtime *runtime = substream->runtime; 1033117bb31SNicolin Chen struct fsl_asrc_pair *pair = runtime->private_data; 1043117bb31SNicolin Chen int ret; 1053117bb31SNicolin Chen 1063117bb31SNicolin Chen switch (cmd) { 1073117bb31SNicolin Chen case SNDRV_PCM_TRIGGER_START: 1083117bb31SNicolin Chen case SNDRV_PCM_TRIGGER_RESUME: 1093117bb31SNicolin Chen case SNDRV_PCM_TRIGGER_PAUSE_RELEASE: 1103117bb31SNicolin Chen ret = fsl_asrc_dma_prepare_and_submit(substream); 1113117bb31SNicolin Chen if (ret) 1123117bb31SNicolin Chen return ret; 1133117bb31SNicolin Chen dma_async_issue_pending(pair->dma_chan[IN]); 1143117bb31SNicolin Chen dma_async_issue_pending(pair->dma_chan[OUT]); 1153117bb31SNicolin Chen break; 1163117bb31SNicolin Chen case SNDRV_PCM_TRIGGER_STOP: 1173117bb31SNicolin Chen case SNDRV_PCM_TRIGGER_SUSPEND: 1183117bb31SNicolin Chen case SNDRV_PCM_TRIGGER_PAUSE_PUSH: 1193117bb31SNicolin Chen dmaengine_terminate_all(pair->dma_chan[OUT]); 1203117bb31SNicolin Chen dmaengine_terminate_all(pair->dma_chan[IN]); 1213117bb31SNicolin Chen break; 1223117bb31SNicolin Chen default: 1233117bb31SNicolin Chen return -EINVAL; 1243117bb31SNicolin Chen } 1253117bb31SNicolin Chen 1263117bb31SNicolin Chen return 0; 1273117bb31SNicolin Chen } 1283117bb31SNicolin Chen 1293117bb31SNicolin Chen static int fsl_asrc_dma_hw_params(struct snd_pcm_substream *substream, 1303117bb31SNicolin Chen struct snd_pcm_hw_params *params) 1313117bb31SNicolin Chen { 1323117bb31SNicolin Chen enum dma_slave_buswidth buswidth = DMA_SLAVE_BUSWIDTH_2_BYTES; 1333117bb31SNicolin Chen struct snd_soc_pcm_runtime *rtd = substream->private_data; 1343117bb31SNicolin Chen bool tx = substream->stream == SNDRV_PCM_STREAM_PLAYBACK; 1353117bb31SNicolin Chen struct snd_dmaengine_dai_dma_data *dma_params_fe = NULL; 1363117bb31SNicolin Chen struct snd_dmaengine_dai_dma_data *dma_params_be = NULL; 1377f110661SKuninori Morimoto struct snd_soc_component *component = snd_soc_rtdcom_lookup(rtd, DRV_NAME); 1383117bb31SNicolin Chen struct snd_pcm_runtime *runtime = substream->runtime; 1393117bb31SNicolin Chen struct fsl_asrc_pair *pair = runtime->private_data; 1403117bb31SNicolin Chen struct fsl_asrc *asrc_priv = pair->asrc_priv; 1413117bb31SNicolin Chen struct dma_slave_config config_fe, config_be; 1423117bb31SNicolin Chen enum asrc_pair_index index = pair->index; 1437f110661SKuninori Morimoto struct device *dev = component->dev; 1443117bb31SNicolin Chen int stream = substream->stream; 1453117bb31SNicolin Chen struct imx_dma_data *tmp_data; 1463117bb31SNicolin Chen struct snd_soc_dpcm *dpcm; 1473117bb31SNicolin Chen struct dma_chan *tmp_chan; 1483117bb31SNicolin Chen struct device *dev_be; 1493117bb31SNicolin Chen u8 dir = tx ? OUT : IN; 1503117bb31SNicolin Chen dma_cap_mask_t mask; 1513117bb31SNicolin Chen int ret; 1523117bb31SNicolin Chen 1533117bb31SNicolin Chen /* Fetch the Back-End dma_data from DPCM */ 1548d6258a4SKuninori Morimoto for_each_dpcm_be(rtd, stream, dpcm) { 1553117bb31SNicolin Chen struct snd_soc_pcm_runtime *be = dpcm->be; 1563117bb31SNicolin Chen struct snd_pcm_substream *substream_be; 1573117bb31SNicolin Chen struct snd_soc_dai *dai = be->cpu_dai; 1583117bb31SNicolin Chen 1593117bb31SNicolin Chen if (dpcm->fe != rtd) 1603117bb31SNicolin Chen continue; 1613117bb31SNicolin Chen 1623117bb31SNicolin Chen substream_be = snd_soc_dpcm_get_substream(be, stream); 1633117bb31SNicolin Chen dma_params_be = snd_soc_dai_get_dma_data(dai, substream_be); 1643117bb31SNicolin Chen dev_be = dai->dev; 1653117bb31SNicolin Chen break; 1663117bb31SNicolin Chen } 1673117bb31SNicolin Chen 1683117bb31SNicolin Chen if (!dma_params_be) { 1693117bb31SNicolin Chen dev_err(dev, "failed to get the substream of Back-End\n"); 1703117bb31SNicolin Chen return -EINVAL; 1713117bb31SNicolin Chen } 1723117bb31SNicolin Chen 1733117bb31SNicolin Chen /* Override dma_data of the Front-End and config its dmaengine */ 1743117bb31SNicolin Chen dma_params_fe = snd_soc_dai_get_dma_data(rtd->cpu_dai, substream); 1753117bb31SNicolin Chen dma_params_fe->addr = asrc_priv->paddr + REG_ASRDx(!dir, index); 1763117bb31SNicolin Chen dma_params_fe->maxburst = dma_params_be->maxburst; 1773117bb31SNicolin Chen 1783117bb31SNicolin Chen pair->dma_chan[!dir] = fsl_asrc_get_dma_channel(pair, !dir); 1793117bb31SNicolin Chen if (!pair->dma_chan[!dir]) { 1803117bb31SNicolin Chen dev_err(dev, "failed to request DMA channel\n"); 1813117bb31SNicolin Chen return -EINVAL; 1823117bb31SNicolin Chen } 1833117bb31SNicolin Chen 1843117bb31SNicolin Chen memset(&config_fe, 0, sizeof(config_fe)); 1853117bb31SNicolin Chen ret = snd_dmaengine_pcm_prepare_slave_config(substream, params, &config_fe); 1863117bb31SNicolin Chen if (ret) { 1873117bb31SNicolin Chen dev_err(dev, "failed to prepare DMA config for Front-End\n"); 1883117bb31SNicolin Chen return ret; 1893117bb31SNicolin Chen } 1903117bb31SNicolin Chen 1913117bb31SNicolin Chen ret = dmaengine_slave_config(pair->dma_chan[!dir], &config_fe); 1923117bb31SNicolin Chen if (ret) { 1933117bb31SNicolin Chen dev_err(dev, "failed to config DMA channel for Front-End\n"); 1943117bb31SNicolin Chen return ret; 1953117bb31SNicolin Chen } 1963117bb31SNicolin Chen 1973117bb31SNicolin Chen /* Request and config DMA channel for Back-End */ 1983117bb31SNicolin Chen dma_cap_zero(mask); 1993117bb31SNicolin Chen dma_cap_set(DMA_SLAVE, mask); 2003117bb31SNicolin Chen dma_cap_set(DMA_CYCLIC, mask); 2013117bb31SNicolin Chen 2023117bb31SNicolin Chen /* Get DMA request of Back-End */ 2033117bb31SNicolin Chen tmp_chan = dma_request_slave_channel(dev_be, tx ? "tx" : "rx"); 2043117bb31SNicolin Chen tmp_data = tmp_chan->private; 2053117bb31SNicolin Chen pair->dma_data.dma_request = tmp_data->dma_request; 2063117bb31SNicolin Chen dma_release_channel(tmp_chan); 2073117bb31SNicolin Chen 2083117bb31SNicolin Chen /* Get DMA request of Front-End */ 2093117bb31SNicolin Chen tmp_chan = fsl_asrc_get_dma_channel(pair, dir); 2103117bb31SNicolin Chen tmp_data = tmp_chan->private; 2113117bb31SNicolin Chen pair->dma_data.dma_request2 = tmp_data->dma_request; 2123117bb31SNicolin Chen pair->dma_data.peripheral_type = tmp_data->peripheral_type; 2133117bb31SNicolin Chen pair->dma_data.priority = tmp_data->priority; 2143117bb31SNicolin Chen dma_release_channel(tmp_chan); 2153117bb31SNicolin Chen 2163117bb31SNicolin Chen pair->dma_chan[dir] = dma_request_channel(mask, filter, &pair->dma_data); 2173117bb31SNicolin Chen if (!pair->dma_chan[dir]) { 2183117bb31SNicolin Chen dev_err(dev, "failed to request DMA channel for Back-End\n"); 2193117bb31SNicolin Chen return -EINVAL; 2203117bb31SNicolin Chen } 2213117bb31SNicolin Chen 2223117bb31SNicolin Chen if (asrc_priv->asrc_width == 16) 2233117bb31SNicolin Chen buswidth = DMA_SLAVE_BUSWIDTH_2_BYTES; 2243117bb31SNicolin Chen else 2253117bb31SNicolin Chen buswidth = DMA_SLAVE_BUSWIDTH_4_BYTES; 2263117bb31SNicolin Chen 2273117bb31SNicolin Chen config_be.direction = DMA_DEV_TO_DEV; 2283117bb31SNicolin Chen config_be.src_addr_width = buswidth; 2293117bb31SNicolin Chen config_be.src_maxburst = dma_params_be->maxburst; 2303117bb31SNicolin Chen config_be.dst_addr_width = buswidth; 2313117bb31SNicolin Chen config_be.dst_maxburst = dma_params_be->maxburst; 2323117bb31SNicolin Chen 2333117bb31SNicolin Chen if (tx) { 2343117bb31SNicolin Chen config_be.src_addr = asrc_priv->paddr + REG_ASRDO(index); 2353117bb31SNicolin Chen config_be.dst_addr = dma_params_be->addr; 2363117bb31SNicolin Chen } else { 2373117bb31SNicolin Chen config_be.dst_addr = asrc_priv->paddr + REG_ASRDI(index); 2383117bb31SNicolin Chen config_be.src_addr = dma_params_be->addr; 2393117bb31SNicolin Chen } 2403117bb31SNicolin Chen 2413117bb31SNicolin Chen ret = dmaengine_slave_config(pair->dma_chan[dir], &config_be); 2423117bb31SNicolin Chen if (ret) { 2433117bb31SNicolin Chen dev_err(dev, "failed to config DMA channel for Back-End\n"); 2443117bb31SNicolin Chen return ret; 2453117bb31SNicolin Chen } 2463117bb31SNicolin Chen 2473117bb31SNicolin Chen snd_pcm_set_runtime_buffer(substream, &substream->dma_buffer); 2483117bb31SNicolin Chen 2493117bb31SNicolin Chen return 0; 2503117bb31SNicolin Chen } 2513117bb31SNicolin Chen 2523117bb31SNicolin Chen static int fsl_asrc_dma_hw_free(struct snd_pcm_substream *substream) 2533117bb31SNicolin Chen { 2543117bb31SNicolin Chen struct snd_pcm_runtime *runtime = substream->runtime; 2553117bb31SNicolin Chen struct fsl_asrc_pair *pair = runtime->private_data; 2563117bb31SNicolin Chen 2573117bb31SNicolin Chen snd_pcm_set_runtime_buffer(substream, NULL); 2583117bb31SNicolin Chen 2593117bb31SNicolin Chen if (pair->dma_chan[IN]) 2603117bb31SNicolin Chen dma_release_channel(pair->dma_chan[IN]); 2613117bb31SNicolin Chen 2623117bb31SNicolin Chen if (pair->dma_chan[OUT]) 2633117bb31SNicolin Chen dma_release_channel(pair->dma_chan[OUT]); 2643117bb31SNicolin Chen 2653117bb31SNicolin Chen pair->dma_chan[IN] = NULL; 2663117bb31SNicolin Chen pair->dma_chan[OUT] = NULL; 2673117bb31SNicolin Chen 2683117bb31SNicolin Chen return 0; 2693117bb31SNicolin Chen } 2703117bb31SNicolin Chen 2713117bb31SNicolin Chen static int fsl_asrc_dma_startup(struct snd_pcm_substream *substream) 2723117bb31SNicolin Chen { 2733117bb31SNicolin Chen struct snd_soc_pcm_runtime *rtd = substream->private_data; 2743117bb31SNicolin Chen struct snd_pcm_runtime *runtime = substream->runtime; 2757f110661SKuninori Morimoto struct snd_soc_component *component = snd_soc_rtdcom_lookup(rtd, DRV_NAME); 2767f110661SKuninori Morimoto struct device *dev = component->dev; 2773117bb31SNicolin Chen struct fsl_asrc *asrc_priv = dev_get_drvdata(dev); 2783117bb31SNicolin Chen struct fsl_asrc_pair *pair; 2793117bb31SNicolin Chen 2803117bb31SNicolin Chen pair = kzalloc(sizeof(struct fsl_asrc_pair), GFP_KERNEL); 281443be77eSMarkus Elfring if (!pair) 2823117bb31SNicolin Chen return -ENOMEM; 2833117bb31SNicolin Chen 2843117bb31SNicolin Chen pair->asrc_priv = asrc_priv; 2853117bb31SNicolin Chen 2863117bb31SNicolin Chen runtime->private_data = pair; 2873117bb31SNicolin Chen 2883117bb31SNicolin Chen snd_pcm_hw_constraint_integer(substream->runtime, 2893117bb31SNicolin Chen SNDRV_PCM_HW_PARAM_PERIODS); 2903117bb31SNicolin Chen snd_soc_set_runtime_hwparams(substream, &snd_imx_hardware); 2913117bb31SNicolin Chen 2923117bb31SNicolin Chen return 0; 2933117bb31SNicolin Chen } 2943117bb31SNicolin Chen 2953117bb31SNicolin Chen static int fsl_asrc_dma_shutdown(struct snd_pcm_substream *substream) 2963117bb31SNicolin Chen { 2973117bb31SNicolin Chen struct snd_pcm_runtime *runtime = substream->runtime; 2983117bb31SNicolin Chen struct fsl_asrc_pair *pair = runtime->private_data; 2996ccf62c7SNicolin Chen struct fsl_asrc *asrc_priv; 3003117bb31SNicolin Chen 3016ccf62c7SNicolin Chen if (!pair) 3026ccf62c7SNicolin Chen return 0; 3036ccf62c7SNicolin Chen 3046ccf62c7SNicolin Chen asrc_priv = pair->asrc_priv; 3056ccf62c7SNicolin Chen 3066ccf62c7SNicolin Chen if (asrc_priv->pair[pair->index] == pair) 3073117bb31SNicolin Chen asrc_priv->pair[pair->index] = NULL; 3083117bb31SNicolin Chen 3093117bb31SNicolin Chen kfree(pair); 3103117bb31SNicolin Chen 3113117bb31SNicolin Chen return 0; 3123117bb31SNicolin Chen } 3133117bb31SNicolin Chen 3143117bb31SNicolin Chen static snd_pcm_uframes_t fsl_asrc_dma_pcm_pointer(struct snd_pcm_substream *substream) 3153117bb31SNicolin Chen { 3163117bb31SNicolin Chen struct snd_pcm_runtime *runtime = substream->runtime; 3173117bb31SNicolin Chen struct fsl_asrc_pair *pair = runtime->private_data; 3183117bb31SNicolin Chen 3193117bb31SNicolin Chen return bytes_to_frames(substream->runtime, pair->pos); 3203117bb31SNicolin Chen } 3213117bb31SNicolin Chen 322115c7254SJulia Lawall static const struct snd_pcm_ops fsl_asrc_dma_pcm_ops = { 3233117bb31SNicolin Chen .ioctl = snd_pcm_lib_ioctl, 3243117bb31SNicolin Chen .hw_params = fsl_asrc_dma_hw_params, 3253117bb31SNicolin Chen .hw_free = fsl_asrc_dma_hw_free, 3263117bb31SNicolin Chen .trigger = fsl_asrc_dma_trigger, 3273117bb31SNicolin Chen .open = fsl_asrc_dma_startup, 3283117bb31SNicolin Chen .close = fsl_asrc_dma_shutdown, 3293117bb31SNicolin Chen .pointer = fsl_asrc_dma_pcm_pointer, 3303117bb31SNicolin Chen }; 3313117bb31SNicolin Chen 3323117bb31SNicolin Chen static int fsl_asrc_dma_pcm_new(struct snd_soc_pcm_runtime *rtd) 3333117bb31SNicolin Chen { 3343117bb31SNicolin Chen struct snd_card *card = rtd->card->snd_card; 3353117bb31SNicolin Chen struct snd_pcm_substream *substream; 3363117bb31SNicolin Chen struct snd_pcm *pcm = rtd->pcm; 3373117bb31SNicolin Chen int ret, i; 3383117bb31SNicolin Chen 3393117bb31SNicolin Chen ret = dma_coerce_mask_and_coherent(card->dev, DMA_BIT_MASK(32)); 3403117bb31SNicolin Chen if (ret) { 3413117bb31SNicolin Chen dev_err(card->dev, "failed to set DMA mask\n"); 3423117bb31SNicolin Chen return ret; 3433117bb31SNicolin Chen } 3443117bb31SNicolin Chen 3453117bb31SNicolin Chen for (i = SNDRV_PCM_STREAM_PLAYBACK; i <= SNDRV_PCM_STREAM_LAST; i++) { 3463117bb31SNicolin Chen substream = pcm->streams[i].substream; 3473117bb31SNicolin Chen if (!substream) 3483117bb31SNicolin Chen continue; 3493117bb31SNicolin Chen 3503117bb31SNicolin Chen ret = snd_dma_alloc_pages(SNDRV_DMA_TYPE_DEV, pcm->card->dev, 3513117bb31SNicolin Chen FSL_ASRC_DMABUF_SIZE, &substream->dma_buffer); 3523117bb31SNicolin Chen if (ret) { 3533117bb31SNicolin Chen dev_err(card->dev, "failed to allocate DMA buffer\n"); 3543117bb31SNicolin Chen goto err; 3553117bb31SNicolin Chen } 3563117bb31SNicolin Chen } 3573117bb31SNicolin Chen 3583117bb31SNicolin Chen return 0; 3593117bb31SNicolin Chen 3603117bb31SNicolin Chen err: 3613117bb31SNicolin Chen if (--i == 0 && pcm->streams[i].substream) 3623117bb31SNicolin Chen snd_dma_free_pages(&pcm->streams[i].substream->dma_buffer); 3633117bb31SNicolin Chen 3643117bb31SNicolin Chen return ret; 3653117bb31SNicolin Chen } 3663117bb31SNicolin Chen 3673117bb31SNicolin Chen static void fsl_asrc_dma_pcm_free(struct snd_pcm *pcm) 3683117bb31SNicolin Chen { 3693117bb31SNicolin Chen struct snd_pcm_substream *substream; 3703117bb31SNicolin Chen int i; 3713117bb31SNicolin Chen 3723117bb31SNicolin Chen for (i = SNDRV_PCM_STREAM_PLAYBACK; i <= SNDRV_PCM_STREAM_LAST; i++) { 3733117bb31SNicolin Chen substream = pcm->streams[i].substream; 3743117bb31SNicolin Chen if (!substream) 3753117bb31SNicolin Chen continue; 3763117bb31SNicolin Chen 3773117bb31SNicolin Chen snd_dma_free_pages(&substream->dma_buffer); 3783117bb31SNicolin Chen substream->dma_buffer.area = NULL; 3793117bb31SNicolin Chen substream->dma_buffer.addr = 0; 3803117bb31SNicolin Chen } 3813117bb31SNicolin Chen } 3823117bb31SNicolin Chen 3837f110661SKuninori Morimoto struct snd_soc_component_driver fsl_asrc_component = { 3847f110661SKuninori Morimoto .name = DRV_NAME, 3853117bb31SNicolin Chen .ops = &fsl_asrc_dma_pcm_ops, 3863117bb31SNicolin Chen .pcm_new = fsl_asrc_dma_pcm_new, 3873117bb31SNicolin Chen .pcm_free = fsl_asrc_dma_pcm_free, 3883117bb31SNicolin Chen }; 3897f110661SKuninori Morimoto EXPORT_SYMBOL_GPL(fsl_asrc_component); 390