projects / linux-2.6-block.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> |
| 8380222e SH |
17 | |
| 18 | #include <sound/core.h> | |
| 8380222e | 19 | #include <sound/pcm.h> |
| 8380222e | 20 | #include <sound/soc.h> |
| c307e8e3 | 21 | #include <sound/dmaengine_pcm.h> |
| 8380222e | 22 | |
| 4762fbab | 23 | #include "imx-pcm.h" |
| 8380222e | 24 | |
| bf974a0d | 25 | static bool filter(struct dma_chan *chan, void *param) |
| 8380222e | 26 | { |
| a8909c9b LPC |
27 | struct snd_dmaengine_dai_dma_data *dma_data = param; |
| 28 | ||
| bf974a0d SH |
29 | if (!imx_dma_is_general_purpose(chan)) |
| 30 | return false; | |
| 8380222e | 31 | |
| a8909c9b | 32 | chan->private = dma_data->filter_data; |
| 671999cb | 33 | |
| c307e8e3 | 34 | return true; |
| 4564d10f LPC |
35 | } |
| 36 | ||
| adaa3229 | 37 | static const struct snd_pcm_hardware imx_pcm_hardware = { |
| 8380222e SH |
38 | .info = SNDRV_PCM_INFO_INTERLEAVED | |
| 39 | SNDRV_PCM_INFO_BLOCK_TRANSFER | | |
| 40 | SNDRV_PCM_INFO_MMAP | | |
| 41 | SNDRV_PCM_INFO_MMAP_VALID | | |
| 42 | SNDRV_PCM_INFO_PAUSE | | |
| 43 | SNDRV_PCM_INFO_RESUME, | |
| 44 | .formats = SNDRV_PCM_FMTBIT_S16_LE, | |
| 45 | .rate_min = 8000, | |
| 46 | .channels_min = 2, | |
| 47 | .channels_max = 2, | |
| 48 | .buffer_bytes_max = IMX_SSI_DMABUF_SIZE, | |
| 49 | .period_bytes_min = 128, | |
| bf974a0d | 50 | .period_bytes_max = 65535, /* Limited by SDMA engine */ |
| 8380222e SH |
51 | .periods_min = 2, |
| 52 | .periods_max = 255, | |
| 53 | .fifo_size = 0, | |
| 54 | }; | |
| 55 | ||
| adaa3229 LPC |
56 | static const struct snd_dmaengine_pcm_config imx_dmaengine_pcm_config = { |
| 57 | .pcm_hardware = &imx_pcm_hardware, | |
| 58 | .prepare_slave_config = snd_dmaengine_pcm_prepare_slave_config, | |
| 59 | .compat_filter_fn = filter, | |
| 60 | .prealloc_buffer_size = IMX_SSI_DMABUF_SIZE, | |
| 8380222e SH |
61 | }; |
| 62 | ||
| 1927661b | 63 | int imx_pcm_dma_init(struct platform_device *pdev) |
| 8380222e | 64 | { |
| adaa3229 LPC |
65 | return snd_dmaengine_pcm_register(&pdev->dev, &imx_dmaengine_pcm_config, |
| 66 | SND_DMAENGINE_PCM_FLAG_NO_RESIDUE | | |
| 67 | SND_DMAENGINE_PCM_FLAG_NO_DT | | |
| 68 | SND_DMAENGINE_PCM_FLAG_COMPAT); | |
| 69 | } | |
| 70 | ||
| 71 | void imx_pcm_dma_exit(struct platform_device *pdev) | |
| 72 | { | |
| 73 | snd_dmaengine_pcm_unregister(&pdev->dev); | |
| f0fba2ad | 74 | } |