Liam Girdwood | f11a96d | 2006-10-12 14:26:55 +0200 | [diff] [blame] | 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 | |
Liam Girdwood | f11a96d | 2006-10-12 14:26:55 +0200 | [diff] [blame] | 13 | #include <linux/dma-mapping.h> |
| 14 | |
Liam Girdwood | f11a96d | 2006-10-12 14:26:55 +0200 | [diff] [blame] | 15 | #include <sound/core.h> |
Liam Girdwood | f11a96d | 2006-10-12 14:26:55 +0200 | [diff] [blame] | 16 | #include <sound/soc.h> |
Dmitry Baryshkov | a6d7731 | 2008-09-10 05:01:20 +0400 | [diff] [blame] | 17 | #include <sound/pxa2xx-lib.h> |
Liam Girdwood | f11a96d | 2006-10-12 14:26:55 +0200 | [diff] [blame] | 18 | |
Dmitry Baryshkov | a6d7731 | 2008-09-10 05:01:20 +0400 | [diff] [blame] | 19 | #include "../../arm/pxa2xx-pcm.h" |
Liam Girdwood | f11a96d | 2006-10-12 14:26:55 +0200 | [diff] [blame] | 20 | |
| 21 | static int pxa2xx_pcm_hw_params(struct snd_pcm_substream *substream, |
| 22 | struct snd_pcm_hw_params *params) |
| 23 | { |
| 24 | struct snd_pcm_runtime *runtime = substream->runtime; |
| 25 | struct pxa2xx_runtime_data *prtd = runtime->private_data; |
| 26 | struct snd_soc_pcm_runtime *rtd = substream->private_data; |
Daniel Mack | 5f712b2 | 2010-03-22 10:11:15 +0100 | [diff] [blame] | 27 | struct pxa2xx_pcm_dma_params *dma; |
Liam Girdwood | f11a96d | 2006-10-12 14:26:55 +0200 | [diff] [blame] | 28 | int ret; |
| 29 | |
Liam Girdwood | f0fba2a | 2010-03-17 20:15:21 +0000 | [diff] [blame] | 30 | dma = snd_soc_dai_get_dma_data(rtd->cpu_dai, substream); |
Daniel Mack | 5f712b2 | 2010-03-22 10:11:15 +0100 | [diff] [blame] | 31 | |
Andrew Johnson | a8f5d0a | 2007-02-02 17:21:50 +0100 | [diff] [blame] | 32 | /* return if this is a bufferless transfer e.g. |
| 33 | * codec <--> BT codec or GSM modem -- lg FIXME */ |
Mark Brown | b32432e | 2008-04-23 15:14:18 +0200 | [diff] [blame] | 34 | if (!dma) |
| 35 | return 0; |
Andrew Johnson | a8f5d0a | 2007-02-02 17:21:50 +0100 | [diff] [blame] | 36 | |
Liam Girdwood | f11a96d | 2006-10-12 14:26:55 +0200 | [diff] [blame] | 37 | /* this may get called several times by oss emulation |
| 38 | * with different params */ |
| 39 | if (prtd->params == NULL) { |
| 40 | prtd->params = dma; |
| 41 | ret = pxa_request_dma(prtd->params->name, DMA_PRIO_LOW, |
| 42 | pxa2xx_pcm_dma_irq, substream); |
| 43 | if (ret < 0) |
| 44 | return ret; |
| 45 | prtd->dma_ch = ret; |
| 46 | } else if (prtd->params != dma) { |
| 47 | pxa_free_dma(prtd->dma_ch); |
| 48 | prtd->params = dma; |
| 49 | ret = pxa_request_dma(prtd->params->name, DMA_PRIO_LOW, |
| 50 | pxa2xx_pcm_dma_irq, substream); |
| 51 | if (ret < 0) |
| 52 | return ret; |
| 53 | prtd->dma_ch = ret; |
| 54 | } |
| 55 | |
Dmitry Baryshkov | a6d7731 | 2008-09-10 05:01:20 +0400 | [diff] [blame] | 56 | return __pxa2xx_pcm_hw_params(substream, params); |
Liam Girdwood | f11a96d | 2006-10-12 14:26:55 +0200 | [diff] [blame] | 57 | } |
| 58 | |
| 59 | static int pxa2xx_pcm_hw_free(struct snd_pcm_substream *substream) |
| 60 | { |
| 61 | struct pxa2xx_runtime_data *prtd = substream->runtime->private_data; |
| 62 | |
Dmitry Baryshkov | a6d7731 | 2008-09-10 05:01:20 +0400 | [diff] [blame] | 63 | __pxa2xx_pcm_hw_free(substream); |
Liam Girdwood | f11a96d | 2006-10-12 14:26:55 +0200 | [diff] [blame] | 64 | |
Stephen Ware | 9bef648 | 2008-12-31 14:39:23 -0800 | [diff] [blame] | 65 | if (prtd->dma_ch >= 0) { |
Liam Girdwood | f11a96d | 2006-10-12 14:26:55 +0200 | [diff] [blame] | 66 | pxa_free_dma(prtd->dma_ch); |
Stephen Ware | 9bef648 | 2008-12-31 14:39:23 -0800 | [diff] [blame] | 67 | prtd->dma_ch = -1; |
Liam Girdwood | f11a96d | 2006-10-12 14:26:55 +0200 | [diff] [blame] | 68 | } |
| 69 | |
| 70 | return 0; |
| 71 | } |
| 72 | |
Mark Brown | 0e734ad | 2008-11-21 14:05:48 +0000 | [diff] [blame] | 73 | static struct snd_pcm_ops pxa2xx_pcm_ops = { |
Dmitry Baryshkov | a6d7731 | 2008-09-10 05:01:20 +0400 | [diff] [blame] | 74 | .open = __pxa2xx_pcm_open, |
| 75 | .close = __pxa2xx_pcm_close, |
Liam Girdwood | f11a96d | 2006-10-12 14:26:55 +0200 | [diff] [blame] | 76 | .ioctl = snd_pcm_lib_ioctl, |
| 77 | .hw_params = pxa2xx_pcm_hw_params, |
| 78 | .hw_free = pxa2xx_pcm_hw_free, |
Dmitry Baryshkov | a6d7731 | 2008-09-10 05:01:20 +0400 | [diff] [blame] | 79 | .prepare = __pxa2xx_pcm_prepare, |
Liam Girdwood | f11a96d | 2006-10-12 14:26:55 +0200 | [diff] [blame] | 80 | .trigger = pxa2xx_pcm_trigger, |
| 81 | .pointer = pxa2xx_pcm_pointer, |
| 82 | .mmap = pxa2xx_pcm_mmap, |
| 83 | }; |
| 84 | |
Yang Hongyang | 284901a | 2009-04-06 19:01:15 -0700 | [diff] [blame] | 85 | static u64 pxa2xx_pcm_dmamask = DMA_BIT_MASK(32); |
Liam Girdwood | f11a96d | 2006-10-12 14:26:55 +0200 | [diff] [blame] | 86 | |
Dmitry Baryshkov | 8a33de9 | 2008-07-29 11:42:24 +0100 | [diff] [blame] | 87 | static int pxa2xx_soc_pcm_new(struct snd_card *card, struct snd_soc_dai *dai, |
Liam Girdwood | f11a96d | 2006-10-12 14:26:55 +0200 | [diff] [blame] | 88 | struct snd_pcm *pcm) |
| 89 | { |
| 90 | int ret = 0; |
| 91 | |
| 92 | if (!card->dev->dma_mask) |
| 93 | card->dev->dma_mask = &pxa2xx_pcm_dmamask; |
| 94 | if (!card->dev->coherent_dma_mask) |
Yang Hongyang | 284901a | 2009-04-06 19:01:15 -0700 | [diff] [blame] | 95 | card->dev->coherent_dma_mask = DMA_BIT_MASK(32); |
Liam Girdwood | f11a96d | 2006-10-12 14:26:55 +0200 | [diff] [blame] | 96 | |
Liam Girdwood | f0fba2a | 2010-03-17 20:15:21 +0000 | [diff] [blame] | 97 | if (dai->driver->playback.channels_min) { |
Liam Girdwood | f11a96d | 2006-10-12 14:26:55 +0200 | [diff] [blame] | 98 | ret = pxa2xx_pcm_preallocate_dma_buffer(pcm, |
| 99 | SNDRV_PCM_STREAM_PLAYBACK); |
| 100 | if (ret) |
| 101 | goto out; |
| 102 | } |
| 103 | |
Liam Girdwood | f0fba2a | 2010-03-17 20:15:21 +0000 | [diff] [blame] | 104 | if (dai->driver->capture.channels_min) { |
Liam Girdwood | f11a96d | 2006-10-12 14:26:55 +0200 | [diff] [blame] | 105 | ret = pxa2xx_pcm_preallocate_dma_buffer(pcm, |
| 106 | SNDRV_PCM_STREAM_CAPTURE); |
| 107 | if (ret) |
| 108 | goto out; |
| 109 | } |
| 110 | out: |
| 111 | return ret; |
| 112 | } |
| 113 | |
Liam Girdwood | f0fba2a | 2010-03-17 20:15:21 +0000 | [diff] [blame] | 114 | static struct snd_soc_platform_driver pxa2xx_soc_platform = { |
| 115 | .ops = &pxa2xx_pcm_ops, |
Dmitry Baryshkov | 8a33de9 | 2008-07-29 11:42:24 +0100 | [diff] [blame] | 116 | .pcm_new = pxa2xx_soc_pcm_new, |
Liam Girdwood | f11a96d | 2006-10-12 14:26:55 +0200 | [diff] [blame] | 117 | .pcm_free = pxa2xx_pcm_free_dma_buffers, |
| 118 | }; |
Liam Girdwood | f11a96d | 2006-10-12 14:26:55 +0200 | [diff] [blame] | 119 | |
Liam Girdwood | f0fba2a | 2010-03-17 20:15:21 +0000 | [diff] [blame] | 120 | static int __devinit pxa2xx_soc_platform_probe(struct platform_device *pdev) |
Mark Brown | 958e792 | 2008-12-03 19:58:17 +0000 | [diff] [blame] | 121 | { |
Liam Girdwood | f0fba2a | 2010-03-17 20:15:21 +0000 | [diff] [blame] | 122 | return snd_soc_register_platform(&pdev->dev, &pxa2xx_soc_platform); |
Mark Brown | 958e792 | 2008-12-03 19:58:17 +0000 | [diff] [blame] | 123 | } |
Mark Brown | 958e792 | 2008-12-03 19:58:17 +0000 | [diff] [blame] | 124 | |
Liam Girdwood | f0fba2a | 2010-03-17 20:15:21 +0000 | [diff] [blame] | 125 | static int __devexit pxa2xx_soc_platform_remove(struct platform_device *pdev) |
Mark Brown | 958e792 | 2008-12-03 19:58:17 +0000 | [diff] [blame] | 126 | { |
Liam Girdwood | f0fba2a | 2010-03-17 20:15:21 +0000 | [diff] [blame] | 127 | snd_soc_unregister_platform(&pdev->dev); |
| 128 | return 0; |
Mark Brown | 958e792 | 2008-12-03 19:58:17 +0000 | [diff] [blame] | 129 | } |
Liam Girdwood | f0fba2a | 2010-03-17 20:15:21 +0000 | [diff] [blame] | 130 | |
| 131 | static struct platform_driver pxa_pcm_driver = { |
| 132 | .driver = { |
| 133 | .name = "pxa-pcm-audio", |
| 134 | .owner = THIS_MODULE, |
| 135 | }, |
| 136 | |
| 137 | .probe = pxa2xx_soc_platform_probe, |
| 138 | .remove = __devexit_p(pxa2xx_soc_platform_remove), |
| 139 | }; |
| 140 | |
| 141 | static int __init snd_pxa_pcm_init(void) |
| 142 | { |
| 143 | return platform_driver_register(&pxa_pcm_driver); |
| 144 | } |
| 145 | module_init(snd_pxa_pcm_init); |
| 146 | |
| 147 | static void __exit snd_pxa_pcm_exit(void) |
| 148 | { |
| 149 | platform_driver_unregister(&pxa_pcm_driver); |
| 150 | } |
| 151 | module_exit(snd_pxa_pcm_exit); |
Mark Brown | 958e792 | 2008-12-03 19:58:17 +0000 | [diff] [blame] | 152 | |
Liam Girdwood | f11a96d | 2006-10-12 14:26:55 +0200 | [diff] [blame] | 153 | MODULE_AUTHOR("Nicolas Pitre"); |
| 154 | MODULE_DESCRIPTION("Intel PXA2xx PCM DMA module"); |
| 155 | MODULE_LICENSE("GPL"); |