1 // SPDX-License-Identifier: GPL-2.0 2 /* 3 * Copyright (C) 2020 Texas Instruments Incorporated - http://www.ti.com 4 * Author: Peter Ujfalusi <peter.ujfalusi@ti.com> 5 */ 6 7 #include <linux/module.h> 8 #include <sound/core.h> 9 #include <sound/pcm.h> 10 #include <sound/pcm_params.h> 11 #include <sound/soc.h> 12 #include <sound/dmaengine_pcm.h> 13 14 #include "udma-pcm.h" 15 16 static const struct snd_pcm_hardware udma_pcm_hardware = { 17 .info = SNDRV_PCM_INFO_MMAP | 18 SNDRV_PCM_INFO_MMAP_VALID | 19 SNDRV_PCM_INFO_PAUSE | SNDRV_PCM_INFO_RESUME | 20 SNDRV_PCM_INFO_NO_PERIOD_WAKEUP | 21 SNDRV_PCM_INFO_INTERLEAVED, 22 .buffer_bytes_max = SIZE_MAX, 23 .period_bytes_min = 32, 24 .period_bytes_max = SZ_64K, 25 .periods_min = 2, 26 .periods_max = UINT_MAX, 27 }; 28 29 static const struct snd_dmaengine_pcm_config udma_dmaengine_pcm_config = { 30 .pcm_hardware = &udma_pcm_hardware, 31 .prepare_slave_config = snd_dmaengine_pcm_prepare_slave_config, 32 }; 33 34 int udma_pcm_platform_register(struct device *dev) 35 { 36 return devm_snd_dmaengine_pcm_register(dev, &udma_dmaengine_pcm_config, 37 0); 38 } 39 EXPORT_SYMBOL_GPL(udma_pcm_platform_register); 40 41 MODULE_AUTHOR("Peter Ujfalusi <peter.ujfalusi@ti.com>"); 42 MODULE_DESCRIPTION("UDMA PCM ASoC platform driver"); 43 MODULE_LICENSE("GPL v2"); 44