1 // SPDX-License-Identifier: GPL-2.0-only <<
2 /* 1 /*
3 * linux/sound/arm/pxa2xx-pcm.c -- ALSA PCM in 2 * linux/sound/arm/pxa2xx-pcm.c -- ALSA PCM interface for the Intel PXA2xx chip
4 * 3 *
5 * Author: Nicolas Pitre 4 * Author: Nicolas Pitre
6 * Created: Nov 30, 2004 5 * Created: Nov 30, 2004
7 * Copyright: (C) 2004 MontaVista Software, 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.
8 */ 11 */
9 12
10 #include <linux/dma-mapping.h> 13 #include <linux/dma-mapping.h>
11 #include <linux/module.h> 14 #include <linux/module.h>
12 #include <linux/dmaengine.h> 15 #include <linux/dmaengine.h>
13 #include <linux/of.h> 16 #include <linux/of.h>
14 17
15 #include <sound/core.h> 18 #include <sound/core.h>
16 #include <sound/soc.h> 19 #include <sound/soc.h>
17 #include <sound/pxa2xx-lib.h> 20 #include <sound/pxa2xx-lib.h>
18 #include <sound/dmaengine_pcm.h> 21 #include <sound/dmaengine_pcm.h>
19 22
20 static const struct snd_soc_component_driver p !! 23 #include "../../arm/pxa2xx-pcm.h"
21 .pcm_construct = pxa2xx_soc_pcm_new, !! 24
22 .open = pxa2xx_soc_pcm_open, !! 25 static int pxa2xx_pcm_hw_params(struct snd_pcm_substream *substream,
23 .close = pxa2xx_soc_pcm_close !! 26 struct snd_pcm_hw_params *params)
24 .hw_params = pxa2xx_soc_pcm_hw_pa !! 27 {
25 .prepare = pxa2xx_soc_pcm_prepa !! 28 struct snd_soc_pcm_runtime *rtd = substream->private_data;
26 .trigger = pxa2xx_soc_pcm_trigg !! 29 struct snd_dmaengine_dai_dma_data *dma;
27 .pointer = pxa2xx_soc_pcm_point !! 30
>> 31 dma = snd_soc_dai_get_dma_data(rtd->cpu_dai, substream);
>> 32
>> 33 /* return if this is a bufferless transfer e.g.
>> 34 * codec <--> BT codec or GSM modem -- lg FIXME */
>> 35 if (!dma)
>> 36 return 0;
>> 37
>> 38 return __pxa2xx_pcm_hw_params(substream, params);
>> 39 }
>> 40
>> 41 static int pxa2xx_pcm_hw_free(struct snd_pcm_substream *substream)
>> 42 {
>> 43 __pxa2xx_pcm_hw_free(substream);
>> 44
>> 45 return 0;
>> 46 }
>> 47
>> 48 static struct snd_pcm_ops pxa2xx_pcm_ops = {
>> 49 .open = __pxa2xx_pcm_open,
>> 50 .close = __pxa2xx_pcm_close,
>> 51 .ioctl = snd_pcm_lib_ioctl,
>> 52 .hw_params = pxa2xx_pcm_hw_params,
>> 53 .hw_free = pxa2xx_pcm_hw_free,
>> 54 .prepare = __pxa2xx_pcm_prepare,
>> 55 .trigger = pxa2xx_pcm_trigger,
>> 56 .pointer = pxa2xx_pcm_pointer,
>> 57 .mmap = pxa2xx_pcm_mmap,
>> 58 };
>> 59
>> 60 static int pxa2xx_soc_pcm_new(struct snd_soc_pcm_runtime *rtd)
>> 61 {
>> 62 struct snd_card *card = rtd->card->snd_card;
>> 63 struct snd_pcm *pcm = rtd->pcm;
>> 64 int ret;
>> 65
>> 66 ret = dma_coerce_mask_and_coherent(card->dev, DMA_BIT_MASK(32));
>> 67 if (ret)
>> 68 return ret;
>> 69
>> 70 if (pcm->streams[SNDRV_PCM_STREAM_PLAYBACK].substream) {
>> 71 ret = pxa2xx_pcm_preallocate_dma_buffer(pcm,
>> 72 SNDRV_PCM_STREAM_PLAYBACK);
>> 73 if (ret)
>> 74 goto out;
>> 75 }
>> 76
>> 77 if (pcm->streams[SNDRV_PCM_STREAM_CAPTURE].substream) {
>> 78 ret = pxa2xx_pcm_preallocate_dma_buffer(pcm,
>> 79 SNDRV_PCM_STREAM_CAPTURE);
>> 80 if (ret)
>> 81 goto out;
>> 82 }
>> 83 out:
>> 84 return ret;
>> 85 }
>> 86
>> 87 static struct snd_soc_platform_driver pxa2xx_soc_platform = {
>> 88 .ops = &pxa2xx_pcm_ops,
>> 89 .pcm_new = pxa2xx_soc_pcm_new,
>> 90 .pcm_free = pxa2xx_pcm_free_dma_buffers,
28 }; 91 };
29 92
30 static int pxa2xx_soc_platform_probe(struct pl 93 static int pxa2xx_soc_platform_probe(struct platform_device *pdev)
31 { 94 {
32 return devm_snd_soc_register_component !! 95 return devm_snd_soc_register_platform(&pdev->dev, &pxa2xx_soc_platform);
33 <<
34 } 96 }
35 97
>> 98 #ifdef CONFIG_OF
>> 99 static const struct of_device_id snd_soc_pxa_audio_match[] = {
>> 100 { .compatible = "mrvl,pxa-pcm-audio" },
>> 101 { }
>> 102 };
>> 103 MODULE_DEVICE_TABLE(of, snd_soc_pxa_audio_match);
>> 104 #endif
>> 105
36 static struct platform_driver pxa_pcm_driver = 106 static struct platform_driver pxa_pcm_driver = {
37 .driver = { 107 .driver = {
38 .name = "pxa-pcm-audio", 108 .name = "pxa-pcm-audio",
>> 109 .of_match_table = of_match_ptr(snd_soc_pxa_audio_match),
39 }, 110 },
40 111
41 .probe = pxa2xx_soc_platform_probe, 112 .probe = pxa2xx_soc_platform_probe,
42 }; 113 };
43 114
44 module_platform_driver(pxa_pcm_driver); 115 module_platform_driver(pxa_pcm_driver);
45 116
46 MODULE_AUTHOR("Nicolas Pitre"); 117 MODULE_AUTHOR("Nicolas Pitre");
47 MODULE_DESCRIPTION("Intel PXA2xx PCM DMA modul 118 MODULE_DESCRIPTION("Intel PXA2xx PCM DMA module");
48 MODULE_LICENSE("GPL"); 119 MODULE_LICENSE("GPL");
49 MODULE_ALIAS("platform:pxa-pcm-audio"); 120 MODULE_ALIAS("platform:pxa-pcm-audio");
50 121
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