| 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 <linux/module.h> |
| 14 | #include <linux/dma-mapping.h> |
| 15 | #include <linux/dmaengine.h> |
| 16 | |
| 17 | #include <mach/dma.h> |
| 18 | |
| 19 | #include <sound/core.h> |
| 20 | #include <sound/pxa2xx-lib.h> |
| 21 | #include <sound/dmaengine_pcm.h> |
| 22 | |
| 23 | #include "pxa2xx-pcm.h" |
| 24 | |
| 25 | static int pxa2xx_pcm_prepare(struct snd_pcm_substream *substream) |
| 26 | { |
| 27 | struct pxa2xx_pcm_client *client = substream->private_data; |
| 28 | |
| 29 | __pxa2xx_pcm_prepare(substream); |
| 30 | |
| 31 | return client->prepare(substream); |
| 32 | } |
| 33 | |
| 34 | static int pxa2xx_pcm_open(struct snd_pcm_substream *substream) |
| 35 | { |
| 36 | struct pxa2xx_pcm_client *client = substream->private_data; |
| 37 | struct snd_pcm_runtime *runtime = substream->runtime; |
| 38 | struct pxa2xx_runtime_data *rtd; |
| 39 | int ret; |
| 40 | |
| 41 | ret = __pxa2xx_pcm_open(substream); |
| 42 | if (ret) |
| 43 | goto out; |
| 44 | |
| 45 | rtd = runtime->private_data; |
| 46 | |
| 47 | rtd->params = (substream->stream == SNDRV_PCM_STREAM_PLAYBACK) ? |
| 48 | client->playback_params : client->capture_params; |
| 49 | |
| 50 | ret = client->startup(substream); |
| 51 | if (!ret) |
| 52 | goto err2; |
| 53 | |
| 54 | return 0; |
| 55 | |
| 56 | err2: |
| 57 | __pxa2xx_pcm_close(substream); |
| 58 | out: |
| 59 | return ret; |
| 60 | } |
| 61 | |
| 62 | static int pxa2xx_pcm_close(struct snd_pcm_substream *substream) |
| 63 | { |
| 64 | struct pxa2xx_pcm_client *client = substream->private_data; |
| 65 | |
| 66 | client->shutdown(substream); |
| 67 | |
| 68 | return __pxa2xx_pcm_close(substream); |
| 69 | } |
| 70 | |
| 71 | static struct snd_pcm_ops pxa2xx_pcm_ops = { |
| 72 | .open = pxa2xx_pcm_open, |
| 73 | .close = pxa2xx_pcm_close, |
| 74 | .ioctl = snd_pcm_lib_ioctl, |
| 75 | .hw_params = __pxa2xx_pcm_hw_params, |
| 76 | .hw_free = __pxa2xx_pcm_hw_free, |
| 77 | .prepare = pxa2xx_pcm_prepare, |
| 78 | .trigger = pxa2xx_pcm_trigger, |
| 79 | .pointer = pxa2xx_pcm_pointer, |
| 80 | .mmap = pxa2xx_pcm_mmap, |
| 81 | }; |
| 82 | |
| 83 | int pxa2xx_pcm_new(struct snd_card *card, struct pxa2xx_pcm_client *client, |
| 84 | struct snd_pcm **rpcm) |
| 85 | { |
| 86 | struct snd_pcm *pcm; |
| 87 | int play = client->playback_params ? 1 : 0; |
| 88 | int capt = client->capture_params ? 1 : 0; |
| 89 | int ret; |
| 90 | |
| 91 | ret = snd_pcm_new(card, "PXA2xx-PCM", 0, play, capt, &pcm); |
| 92 | if (ret) |
| 93 | goto out; |
| 94 | |
| 95 | pcm->private_data = client; |
| 96 | pcm->private_free = pxa2xx_pcm_free_dma_buffers; |
| 97 | |
| 98 | ret = dma_coerce_mask_and_coherent(card->dev, DMA_BIT_MASK(32)); |
| 99 | if (ret) |
| 100 | goto out; |
| 101 | |
| 102 | if (play) { |
| 103 | int stream = SNDRV_PCM_STREAM_PLAYBACK; |
| 104 | snd_pcm_set_ops(pcm, stream, &pxa2xx_pcm_ops); |
| 105 | ret = pxa2xx_pcm_preallocate_dma_buffer(pcm, stream); |
| 106 | if (ret) |
| 107 | goto out; |
| 108 | } |
| 109 | if (capt) { |
| 110 | int stream = SNDRV_PCM_STREAM_CAPTURE; |
| 111 | snd_pcm_set_ops(pcm, stream, &pxa2xx_pcm_ops); |
| 112 | ret = pxa2xx_pcm_preallocate_dma_buffer(pcm, stream); |
| 113 | if (ret) |
| 114 | goto out; |
| 115 | } |
| 116 | |
| 117 | if (rpcm) |
| 118 | *rpcm = pcm; |
| 119 | ret = 0; |
| 120 | |
| 121 | out: |
| 122 | return ret; |
| 123 | } |
| 124 | |
| 125 | EXPORT_SYMBOL(pxa2xx_pcm_new); |
| 126 | |
| 127 | MODULE_AUTHOR("Nicolas Pitre"); |
| 128 | MODULE_DESCRIPTION("Intel PXA2xx PCM DMA module"); |
| 129 | MODULE_LICENSE("GPL"); |