projects / GitHub / mt8127 / android_kernel_alcatel_ttab.git / blame
| Commit | Line | Data |
|---|---|---|
| 4762fbab SG |
1 | /* |
| 2 | * Copyright 2009 Sascha Hauer <s.hauer@pengutronix.de> | |
| 3 | * | |
| 4 | * This code is based on code copyrighted by Freescale, | |
| 5 | * Liam Girdwood, Javier Martin and probably others. | |
| 6 | * | |
| 7 | * This program is free software; you can redistribute it and/or modify it | |
| 8 | * under the terms of the GNU General Public License as published by the | |
| 9 | * Free Software Foundation; either version 2 of the License, or (at your | |
| 10 | * option) any later version. | |
| 11 | */ | |
| 12 | ||
| 13 | #include <linux/dma-mapping.h> | |
| 14 | #include <linux/module.h> | |
| 15 | #include <sound/pcm.h> | |
| 16 | #include <sound/soc.h> | |
| 17 | #include "imx-pcm.h" | |
| 18 | ||
| 19 | int snd_imx_pcm_mmap(struct snd_pcm_substream *substream, | |
| 20 | struct vm_area_struct *vma) | |
| 21 | { | |
| 22 | struct snd_pcm_runtime *runtime = substream->runtime; | |
| 23 | int ret; | |
| 24 | ||
| 25 | ret = dma_mmap_writecombine(substream->pcm->card->dev, vma, | |
| 26 | runtime->dma_area, runtime->dma_addr, runtime->dma_bytes); | |
| 27 | ||
| 28 | pr_debug("%s: ret: %d %p 0x%08x 0x%08x\n", __func__, ret, | |
| 29 | runtime->dma_area, | |
| 30 | runtime->dma_addr, | |
| 31 | runtime->dma_bytes); | |
| 32 | return ret; | |
| 33 | } | |
| 93d7b762 | 34 | EXPORT_SYMBOL_GPL(snd_imx_pcm_mmap); |
| 4762fbab SG |
35 | |
| 36 | static int imx_pcm_preallocate_dma_buffer(struct snd_pcm *pcm, int stream) | |
| 37 | { | |
| 38 | struct snd_pcm_substream *substream = pcm->streams[stream].substream; | |
| 39 | struct snd_dma_buffer *buf = &substream->dma_buffer; | |
| 40 | size_t size = IMX_SSI_DMABUF_SIZE; | |
| 41 | ||
| 42 | buf->dev.type = SNDRV_DMA_TYPE_DEV; | |
| 43 | buf->dev.dev = pcm->card->dev; | |
| 44 | buf->private_data = NULL; | |
| 45 | buf->area = dma_alloc_writecombine(pcm->card->dev, size, | |
| 46 | &buf->addr, GFP_KERNEL); | |
| 47 | if (!buf->area) | |
| 48 | return -ENOMEM; | |
| 49 | buf->bytes = size; | |
| 50 | ||
| 51 | return 0; | |
| 52 | } | |
| 53 | ||
| 54 | static u64 imx_pcm_dmamask = DMA_BIT_MASK(32); | |
| 55 | ||
| 56 | int imx_pcm_new(struct snd_soc_pcm_runtime *rtd) | |
| 57 | { | |
| 58 | struct snd_card *card = rtd->card->snd_card; | |
| 59 | struct snd_pcm *pcm = rtd->pcm; | |
| 60 | int ret = 0; | |
| 61 | ||
| 62 | if (!card->dev->dma_mask) | |
| 63 | card->dev->dma_mask = &imx_pcm_dmamask; | |
| 64 | if (!card->dev->coherent_dma_mask) | |
| 65 | card->dev->coherent_dma_mask = DMA_BIT_MASK(32); | |
| 66 | if (pcm->streams[SNDRV_PCM_STREAM_PLAYBACK].substream) { | |
| 67 | ret = imx_pcm_preallocate_dma_buffer(pcm, | |
| 68 | SNDRV_PCM_STREAM_PLAYBACK); | |
| 69 | if (ret) | |
| 70 | goto out; | |
| 71 | } | |
| 72 | ||
| 73 | if (pcm->streams[SNDRV_PCM_STREAM_CAPTURE].substream) { | |
| 74 | ret = imx_pcm_preallocate_dma_buffer(pcm, | |
| 75 | SNDRV_PCM_STREAM_CAPTURE); | |
| 76 | if (ret) | |
| 77 | goto out; | |
| 78 | } | |
| 79 | ||
| 80 | out: | |
| 81 | return ret; | |
| 82 | } | |
| 93d7b762 | 83 | EXPORT_SYMBOL_GPL(imx_pcm_new); |
| 4762fbab SG |
84 | |
| 85 | void imx_pcm_free(struct snd_pcm *pcm) | |
| 86 | { | |
| 87 | struct snd_pcm_substream *substream; | |
| 88 | struct snd_dma_buffer *buf; | |
| 89 | int stream; | |
| 90 | ||
| 91 | for (stream = 0; stream < 2; stream++) { | |
| 92 | substream = pcm->streams[stream].substream; | |
| 93 | if (!substream) | |
| 94 | continue; | |
| 95 | ||
| 96 | buf = &substream->dma_buffer; | |
| 97 | if (!buf->area) | |
| 98 | continue; | |
| 99 | ||
| 100 | dma_free_writecombine(pcm->card->dev, buf->bytes, | |
| 101 | buf->area, buf->addr); | |
| 102 | buf->area = NULL; | |
| 103 | } | |
| 104 | } | |
| 93d7b762 | 105 | EXPORT_SYMBOL_GPL(imx_pcm_free); |
| ce555e5d | 106 | |
| 1927661b SG |
107 | static int imx_pcm_probe(struct platform_device *pdev) |
| 108 | { | |
| 109 | if (strcmp(pdev->id_entry->name, "imx-fiq-pcm-audio") == 0) | |
| 110 | return imx_pcm_fiq_init(pdev); | |
| 111 | ||
| 112 | return imx_pcm_dma_init(pdev); | |
| 113 | } | |
| 114 | ||
| 115 | static int imx_pcm_remove(struct platform_device *pdev) | |
| 116 | { | |
| adaa3229 LPC |
117 | if (strcmp(pdev->id_entry->name, "imx-fiq-pcm-audio") == 0) |
| 118 | snd_soc_unregister_platform(&pdev->dev); | |
| 119 | else | |
| 120 | imx_pcm_dma_exit(pdev); | |
| 121 | ||
| 1927661b SG |
122 | return 0; |
| 123 | } | |
| 124 | ||
| 125 | static struct platform_device_id imx_pcm_devtype[] = { | |
| 126 | { .name = "imx-pcm-audio", }, | |
| 127 | { .name = "imx-fiq-pcm-audio", }, | |
| 128 | { /* sentinel */ } | |
| 129 | }; | |
| 130 | MODULE_DEVICE_TABLE(platform, imx_pcm_devtype); | |
| 131 | ||
| 132 | static struct platform_driver imx_pcm_driver = { | |
| 133 | .driver = { | |
| 134 | .name = "imx-pcm", | |
| 135 | .owner = THIS_MODULE, | |
| 136 | }, | |
| 137 | .id_table = imx_pcm_devtype, | |
| 138 | .probe = imx_pcm_probe, | |
| 139 | .remove = imx_pcm_remove, | |
| 140 | }; | |
| 141 | module_platform_driver(imx_pcm_driver); | |
| 142 | ||
| ce555e5d LW |
143 | MODULE_DESCRIPTION("Freescale i.MX PCM driver"); |
| 144 | MODULE_AUTHOR("Sascha Hauer <s.hauer@pengutronix.de>"); | |
| 145 | MODULE_LICENSE("GPL"); |