projects / deliverable / linux.git / blame
| Commit | Line | Data |
|---|---|---|
| 8380222e SH |
1 | /* |
| 2 | * imx-pcm-dma-mx2.c -- ALSA Soc Audio Layer | |
| 3 | * | |
| 4 | * Copyright 2009 Sascha Hauer <s.hauer@pengutronix.de> | |
| 5 | * | |
| 6 | * This code is based on code copyrighted by Freescale, | |
| 7 | * Liam Girdwood, Javier Martin and probably others. | |
| 8 | * | |
| 9 | * This program is free software; you can redistribute it and/or modify it | |
| 10 | * under the terms of the GNU General Public License as published by the | |
| 11 | * Free Software Foundation; either version 2 of the License, or (at your | |
| 12 | * option) any later version. | |
| 13 | */ | |
| 8380222e | 14 | #include <linux/platform_device.h> |
| bf974a0d | 15 | #include <linux/dmaengine.h> |
| 258aea76 | 16 | #include <linux/types.h> |
| 3c1c32d3 | 17 | #include <linux/module.h> |
| 8380222e SH |
18 | |
| 19 | #include <sound/core.h> | |
| 8380222e | 20 | #include <sound/pcm.h> |
| 8380222e | 21 | #include <sound/soc.h> |
| c307e8e3 | 22 | #include <sound/dmaengine_pcm.h> |
| 8380222e | 23 | |
| 4762fbab | 24 | #include "imx-pcm.h" |
| 8380222e | 25 | |
| bf974a0d | 26 | static bool filter(struct dma_chan *chan, void *param) |
| 8380222e | 27 | { |
| bf974a0d SH |
28 | if (!imx_dma_is_general_purpose(chan)) |
| 29 | return false; | |
| 8380222e | 30 | |
| 90130d2e | 31 | chan->private = param; |
| 671999cb | 32 | |
| c307e8e3 | 33 | return true; |
| 4564d10f LPC |
34 | } |
| 35 | ||
| adaa3229 | 36 | static const struct snd_pcm_hardware imx_pcm_hardware = { |
| 8380222e SH |
37 | .info = SNDRV_PCM_INFO_INTERLEAVED | |
| 38 | SNDRV_PCM_INFO_BLOCK_TRANSFER | | |
| 39 | SNDRV_PCM_INFO_MMAP | | |
| 40 | SNDRV_PCM_INFO_MMAP_VALID | | |
| 41 | SNDRV_PCM_INFO_PAUSE | | |
| 42 | SNDRV_PCM_INFO_RESUME, | |
| 0d69e0dd | 43 | .buffer_bytes_max = IMX_DEFAULT_DMABUF_SIZE, |
| 8380222e | 44 | .period_bytes_min = 128, |
| bf974a0d | 45 | .period_bytes_max = 65535, /* Limited by SDMA engine */ |
| 8380222e SH |
46 | .periods_min = 2, |
| 47 | .periods_max = 255, | |
| 48 | .fifo_size = 0, | |
| 49 | }; | |
| 50 | ||
| adaa3229 LPC |
51 | static const struct snd_dmaengine_pcm_config imx_dmaengine_pcm_config = { |
| 52 | .pcm_hardware = &imx_pcm_hardware, | |
| 53 | .prepare_slave_config = snd_dmaengine_pcm_prepare_slave_config, | |
| 54 | .compat_filter_fn = filter, | |
| 0d69e0dd | 55 | .prealloc_buffer_size = IMX_DEFAULT_DMABUF_SIZE, |
| 8380222e SH |
56 | }; |
| 57 | ||
| 0d69e0dd | 58 | int imx_pcm_dma_init(struct platform_device *pdev, size_t size) |
| 8380222e | 59 | { |
| 0d69e0dd SW |
60 | struct snd_dmaengine_pcm_config *config; |
| 61 | struct snd_pcm_hardware *pcm_hardware; | |
| 62 | ||
| 63 | config = devm_kzalloc(&pdev->dev, | |
| 64 | sizeof(struct snd_dmaengine_pcm_config), GFP_KERNEL); | |
| 65 | *config = imx_dmaengine_pcm_config; | |
| 66 | if (size) | |
| 67 | config->prealloc_buffer_size = size; | |
| 68 | ||
| 69 | pcm_hardware = devm_kzalloc(&pdev->dev, | |
| 70 | sizeof(struct snd_pcm_hardware), GFP_KERNEL); | |
| 71 | *pcm_hardware = imx_pcm_hardware; | |
| 72 | if (size) | |
| 73 | pcm_hardware->buffer_bytes_max = size; | |
| 74 | ||
| 75 | config->pcm_hardware = pcm_hardware; | |
| 76 | ||
| 7e6d18ac | 77 | return devm_snd_dmaengine_pcm_register(&pdev->dev, |
| 0d69e0dd | 78 | config, |
| adaa3229 LPC |
79 | SND_DMAENGINE_PCM_FLAG_COMPAT); |
| 80 | } | |
| dbdf6b54 | 81 | EXPORT_SYMBOL_GPL(imx_pcm_dma_init); |
| adaa3229 | 82 | |
| 3c1c32d3 | 83 | MODULE_LICENSE("GPL"); |