1/* 2 * linux/sound/arm/pxa2xx-pcm.c -- ALSA PCM interface for the Intel PXA2xx chip 3 * 4 * Author: Nicolas Pitre 5 * Created: Nov 30, 2004 6 * Copyright: (C) 2004 MontaVista Software, Inc. 7 * 8 * This program is free software; you can redistribute it and/or modify 9 * it under the terms of the GNU General Public License version 2 as 10 * published by the Free Software Foundation. 11 */ 12 13#include <sound/core.h> 14#include <sound/pxa2xx-lib.h> 15 16#include "pxa2xx-pcm.h" 17 18static int pxa2xx_pcm_prepare(struct snd_pcm_substream *substream) 19{ 20 struct pxa2xx_pcm_client *client = substream->private_data; 21 22 __pxa2xx_pcm_prepare(substream); 23 24 return client->prepare(substream); 25} 26 27static int pxa2xx_pcm_open(struct snd_pcm_substream *substream) 28{ 29 struct pxa2xx_pcm_client *client = substream->private_data; 30 struct snd_pcm_runtime *runtime = substream->runtime; 31 struct pxa2xx_runtime_data *rtd; 32 int ret; 33 34 ret = __pxa2xx_pcm_open(substream); 35 if (ret) 36 goto out; 37 38 rtd = runtime->private_data; 39 40 rtd->params = (substream->stream == SNDRV_PCM_STREAM_PLAYBACK) ? 41 client->playback_params : client->capture_params; 42 ret = pxa_request_dma(rtd->params->name, DMA_PRIO_LOW, 43 pxa2xx_pcm_dma_irq, substream); 44 if (ret < 0) 45 goto err2; 46 rtd->dma_ch = ret; 47 48 ret = client->startup(substream); 49 if (!ret) 50 goto out; 51 52 pxa_free_dma(rtd->dma_ch); 53 err2: 54 __pxa2xx_pcm_close(substream); 55 out: 56 return ret; 57} 58 59static int pxa2xx_pcm_close(struct snd_pcm_substream *substream) 60{ 61 struct pxa2xx_pcm_client *client = substream->private_data; 62 struct pxa2xx_runtime_data *rtd = substream->runtime->private_data; 63 64 pxa_free_dma(rtd->dma_ch); 65 client->shutdown(substream); 66 67 return __pxa2xx_pcm_close(substream); 68} 69 70static struct snd_pcm_ops pxa2xx_pcm_ops = { 71 .open = pxa2xx_pcm_open, 72 .close = pxa2xx_pcm_close, 73 .ioctl = snd_pcm_lib_ioctl, 74 .hw_params = __pxa2xx_pcm_hw_params, 75 .hw_free = __pxa2xx_pcm_hw_free, 76 .prepare = pxa2xx_pcm_prepare, 77 .trigger = pxa2xx_pcm_trigger, 78 .pointer = pxa2xx_pcm_pointer, 79 .mmap = pxa2xx_pcm_mmap, 80}; 81 82static u64 pxa2xx_pcm_dmamask = 0xffffffff; 83 84int pxa2xx_pcm_new(struct snd_card *card, struct pxa2xx_pcm_client *client, 85 struct snd_pcm **rpcm) 86{ 87 struct snd_pcm *pcm; 88 int play = client->playback_params ? 1 : 0; 89 int capt = client->capture_params ? 1 : 0; 90 int ret; 91 92 ret = snd_pcm_new(card, "PXA2xx-PCM", 0, play, capt, &pcm); 93 if (ret) 94 goto out; 95 96 pcm->private_data = client; 97 pcm->private_free = pxa2xx_pcm_free_dma_buffers; 98 99 if (!card->dev->dma_mask) 100 card->dev->dma_mask = &pxa2xx_pcm_dmamask; 101 if (!card->dev->coherent_dma_mask) 102 card->dev->coherent_dma_mask = 0xffffffff; 103 104 if (play) { 105 int stream = SNDRV_PCM_STREAM_PLAYBACK; 106 snd_pcm_set_ops(pcm, stream, &pxa2xx_pcm_ops); 107 ret = pxa2xx_pcm_preallocate_dma_buffer(pcm, stream); 108 if (ret) 109 goto out; 110 } 111 if (capt) { 112 int stream = SNDRV_PCM_STREAM_CAPTURE; 113 snd_pcm_set_ops(pcm, stream, &pxa2xx_pcm_ops); 114 ret = pxa2xx_pcm_preallocate_dma_buffer(pcm, stream); 115 if (ret) 116 goto out; 117 } 118 119 if (rpcm) 120 *rpcm = pcm; 121 ret = 0; 122 123 out: 124 return ret; 125} 126 127EXPORT_SYMBOL(pxa2xx_pcm_new); 128 129MODULE_AUTHOR("Nicolas Pitre"); 130MODULE_DESCRIPTION("Intel PXA2xx PCM DMA module"); 131MODULE_LICENSE("GPL"); 132