1 // SPDX-License-Identifier: GPL-2.0-only 2 /* 3 * linux/sound/arm/ep93xx-pcm.c - EP93xx ALSA PCM interface 4 * 5 * Copyright (C) 2006 Lennert Buytenhek <buytenh@wantstofly.org> 6 * Copyright (C) 2006 Applied Data Systems 7 * 8 * Rewritten for the SoC audio subsystem (Based on PXA2xx code): 9 * Copyright (c) 2008 Ryan Mallon 10 */ 11 12 #include <linux/module.h> 13 #include <linux/init.h> 14 #include <linux/platform_device.h> 15 #include <linux/dmaengine.h> 16 17 #include <sound/pcm.h> 18 #include <sound/soc.h> 19 #include <sound/dmaengine_pcm.h> 20 21 #include "ep93xx-pcm.h" 22 23 static const struct snd_pcm_hardware ep93xx_pcm_hardware = { 24 .info = (SNDRV_PCM_INFO_MMAP | 25 SNDRV_PCM_INFO_MMAP_VALID | 26 SNDRV_PCM_INFO_INTERLEAVED | 27 SNDRV_PCM_INFO_BLOCK_TRANSFER), 28 .buffer_bytes_max = 131072, 29 .period_bytes_min = 32, 30 .period_bytes_max = 32768, 31 .periods_min = 1, 32 .periods_max = 32, 33 .fifo_size = 32, 34 }; 35 36 static const struct snd_dmaengine_pcm_config ep93xx_dmaengine_pcm_config = { 37 .pcm_hardware = &ep93xx_pcm_hardware, 38 .prealloc_buffer_size = 131072, 39 }; 40 41 int devm_ep93xx_pcm_platform_register(struct device *dev) 42 { 43 return devm_snd_dmaengine_pcm_register(dev, 44 &ep93xx_dmaengine_pcm_config, 0); 45 } 46 EXPORT_SYMBOL_GPL(devm_ep93xx_pcm_platform_register); 47 48 MODULE_AUTHOR("Ryan Mallon"); 49 MODULE_DESCRIPTION("EP93xx ALSA PCM interface"); 50 MODULE_LICENSE("GPL"); 51