~ [ source navigation ] ~ [ diff markup ] ~ [ identifier search ] ~

TOMOYO Linux Cross Reference
Linux/sound/arm/pxa2xx-pcm.c

Version: ~ [ linux-5.11-rc3 ] ~ [ linux-5.10.7 ] ~ [ linux-5.9.16 ] ~ [ linux-5.8.18 ] ~ [ linux-5.7.19 ] ~ [ linux-5.6.19 ] ~ [ linux-5.5.19 ] ~ [ linux-5.4.89 ] ~ [ linux-5.3.18 ] ~ [ linux-5.2.21 ] ~ [ linux-5.1.21 ] ~ [ linux-5.0.21 ] ~ [ linux-4.20.17 ] ~ [ linux-4.19.167 ] ~ [ linux-4.18.20 ] ~ [ linux-4.17.19 ] ~ [ linux-4.16.18 ] ~ [ linux-4.15.18 ] ~ [ linux-4.14.215 ] ~ [ linux-4.13.16 ] ~ [ linux-4.12.14 ] ~ [ linux-4.11.12 ] ~ [ linux-4.10.17 ] ~ [ linux-4.9.251 ] ~ [ linux-4.8.17 ] ~ [ linux-4.7.10 ] ~ [ linux-4.6.7 ] ~ [ linux-4.5.7 ] ~ [ linux-4.4.251 ] ~ [ linux-4.3.6 ] ~ [ linux-4.2.8 ] ~ [ linux-4.1.52 ] ~ [ linux-4.0.9 ] ~ [ linux-3.19.8 ] ~ [ linux-3.18.140 ] ~ [ linux-3.17.8 ] ~ [ linux-3.16.85 ] ~ [ linux-3.15.10 ] ~ [ linux-3.14.79 ] ~ [ linux-3.13.11 ] ~ [ linux-3.12.74 ] ~ [ linux-3.11.10 ] ~ [ linux-3.10.108 ] ~ [ linux-2.6.32.71 ] ~ [ linux-2.6.0 ] ~ [ linux-2.4.37.11 ] ~ [ unix-v6-master ] ~ [ ccs-tools-1.8.5 ] ~ [ policy-sample ] ~
Architecture: ~ [ i386 ] ~ [ alpha ] ~ [ m68k ] ~ [ mips ] ~ [ ppc ] ~ [ sparc ] ~ [ sparc64 ] ~

  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 <sound/core.h>
 18 #include <sound/pxa2xx-lib.h>
 19 #include <sound/dmaengine_pcm.h>
 20 
 21 #include "pxa2xx-pcm.h"
 22 
 23 static int pxa2xx_pcm_prepare(struct snd_pcm_substream *substream)
 24 {
 25         struct pxa2xx_pcm_client *client = substream->private_data;
 26 
 27         __pxa2xx_pcm_prepare(substream);
 28 
 29         return client->prepare(substream);
 30 }
 31 
 32 static int pxa2xx_pcm_open(struct snd_pcm_substream *substream)
 33 {
 34         struct pxa2xx_pcm_client *client = substream->private_data;
 35         struct snd_pcm_runtime *runtime = substream->runtime;
 36         struct pxa2xx_runtime_data *rtd;
 37         int ret;
 38 
 39         ret = __pxa2xx_pcm_open(substream);
 40         if (ret)
 41                 goto out;
 42 
 43         rtd = runtime->private_data;
 44 
 45         rtd->params = (substream->stream == SNDRV_PCM_STREAM_PLAYBACK) ?
 46                       client->playback_params : client->capture_params;
 47         ret = pxa_request_dma("dma", DMA_PRIO_LOW,
 48                               pxa2xx_pcm_dma_irq, substream);
 49         if (ret < 0)
 50                 goto err2;
 51         rtd->dma_ch = ret;
 52 
 53         ret = client->startup(substream);
 54         if (!ret)
 55                 goto out;
 56 
 57         pxa_free_dma(rtd->dma_ch);
 58  err2:
 59         __pxa2xx_pcm_close(substream);
 60  out:
 61         return ret;
 62 }
 63 
 64 static int pxa2xx_pcm_close(struct snd_pcm_substream *substream)
 65 {
 66         struct pxa2xx_pcm_client *client = substream->private_data;
 67         struct pxa2xx_runtime_data *rtd = substream->runtime->private_data;
 68 
 69         pxa_free_dma(rtd->dma_ch);
 70         client->shutdown(substream);
 71 
 72         return __pxa2xx_pcm_close(substream);
 73 }
 74 
 75 static struct snd_pcm_ops pxa2xx_pcm_ops = {
 76         .open           = pxa2xx_pcm_open,
 77         .close          = pxa2xx_pcm_close,
 78         .ioctl          = snd_pcm_lib_ioctl,
 79         .hw_params      = __pxa2xx_pcm_hw_params,
 80         .hw_free        = __pxa2xx_pcm_hw_free,
 81         .prepare        = pxa2xx_pcm_prepare,
 82         .trigger        = pxa2xx_pcm_trigger,
 83         .pointer        = pxa2xx_pcm_pointer,
 84         .mmap           = pxa2xx_pcm_mmap,
 85 };
 86 
 87 int pxa2xx_pcm_new(struct snd_card *card, struct pxa2xx_pcm_client *client,
 88                    struct snd_pcm **rpcm)
 89 {
 90         struct snd_pcm *pcm;
 91         int play = client->playback_params ? 1 : 0;
 92         int capt = client->capture_params ? 1 : 0;
 93         int ret;
 94 
 95         ret = snd_pcm_new(card, "PXA2xx-PCM", 0, play, capt, &pcm);
 96         if (ret)
 97                 goto out;
 98 
 99         pcm->private_data = client;
100         pcm->private_free = pxa2xx_pcm_free_dma_buffers;
101 
102         ret = dma_coerce_mask_and_coherent(card->dev, DMA_BIT_MASK(32));
103         if (ret)
104                 goto out;
105 
106         if (play) {
107                 int stream = SNDRV_PCM_STREAM_PLAYBACK;
108                 snd_pcm_set_ops(pcm, stream, &pxa2xx_pcm_ops);
109                 ret = pxa2xx_pcm_preallocate_dma_buffer(pcm, stream);
110                 if (ret)
111                         goto out;
112         }
113         if (capt) {
114                 int stream = SNDRV_PCM_STREAM_CAPTURE;
115                 snd_pcm_set_ops(pcm, stream, &pxa2xx_pcm_ops);
116                 ret = pxa2xx_pcm_preallocate_dma_buffer(pcm, stream);
117                 if (ret)
118                         goto out;
119         }
120 
121         if (rpcm)
122                 *rpcm = pcm;
123         ret = 0;
124 
125  out:
126         return ret;
127 }
128 
129 EXPORT_SYMBOL(pxa2xx_pcm_new);
130 
131 MODULE_AUTHOR("Nicolas Pitre");
132 MODULE_DESCRIPTION("Intel PXA2xx PCM DMA module");
133 MODULE_LICENSE("GPL");
134 

~ [ source navigation ] ~ [ diff markup ] ~ [ identifier search ] ~

kernel.org | git.kernel.org | LWN.net | Project Home | Wiki (Japanese) | Wiki (English) | SVN repository | Mail admin

Linux® is a registered trademark of Linus Torvalds in the United States and other countries.
TOMOYO® is a registered trademark of NTT DATA CORPORATION.

osdn.jp