projects / deliverable / linux.git / blame
| Commit | Line | Data |
|---|---|---|
| db5bf412 RM |
1 | /* |
| 2 | * linux/sound/arm/ep93xx-pcm.c - EP93xx ALSA PCM interface | |
| 3 | * | |
| 4 | * Copyright (C) 2006 Lennert Buytenhek <buytenh@wantstofly.org> | |
| 5 | * Copyright (C) 2006 Applied Data Systems | |
| 6 | * | |
| 7 | * Rewritten for the SoC audio subsystem (Based on PXA2xx code): | |
| 1c5454ee | 8 | * Copyright (c) 2008 Ryan Mallon |
| db5bf412 RM |
9 | * |
| 10 | * This program is free software; you can redistribute it and/or modify | |
| 11 | * it under the terms of the GNU General Public License version 2 as | |
| 12 | * published by the Free Software Foundation. | |
| 13 | */ | |
| 14 | ||
| 15 | #include <linux/module.h> | |
| 16 | #include <linux/init.h> | |
| e27e8a60 | 17 | #include <linux/platform_device.h> |
| 51e2cc0c | 18 | #include <linux/dmaengine.h> |
| db5bf412 | 19 | |
| db5bf412 | 20 | #include <sound/pcm.h> |
| db5bf412 | 21 | #include <sound/soc.h> |
| d7a42e10 | 22 | #include <sound/dmaengine_pcm.h> |
| db5bf412 | 23 | |
| a3b29245 | 24 | #include <linux/platform_data/dma-ep93xx.h> |
| db5bf412 | 25 | |
| 6f2032a1 SW |
26 | #include "ep93xx-pcm.h" |
| 27 | ||
| db5bf412 RM |
28 | static const struct snd_pcm_hardware ep93xx_pcm_hardware = { |
| 29 | .info = (SNDRV_PCM_INFO_MMAP | | |
| 30 | SNDRV_PCM_INFO_MMAP_VALID | | |
| 31 | SNDRV_PCM_INFO_INTERLEAVED | | |
| 32 | SNDRV_PCM_INFO_BLOCK_TRANSFER), | |
| db5bf412 RM |
33 | .buffer_bytes_max = 131072, |
| 34 | .period_bytes_min = 32, | |
| 35 | .period_bytes_max = 32768, | |
| 36 | .periods_min = 1, | |
| 37 | .periods_max = 32, | |
| 38 | .fifo_size = 32, | |
| 39 | }; | |
| 40 | ||
| 51e2cc0c | 41 | static bool ep93xx_pcm_dma_filter(struct dma_chan *chan, void *filter_param) |
| db5bf412 | 42 | { |
| 51e2cc0c | 43 | struct ep93xx_dma_data *data = filter_param; |
| db5bf412 | 44 | |
| 51e2cc0c MW |
45 | if (data->direction == ep93xx_dma_chan_direction(chan)) { |
| 46 | chan->private = data; | |
| 47 | return true; | |
| db5bf412 | 48 | } |
| 51e2cc0c MW |
49 | |
| 50 | return false; | |
| db5bf412 RM |
51 | } |
| 52 | ||
| e27e8a60 LPC |
53 | static const struct snd_dmaengine_pcm_config ep93xx_dmaengine_pcm_config = { |
| 54 | .pcm_hardware = &ep93xx_pcm_hardware, | |
| 55 | .compat_filter_fn = ep93xx_pcm_dma_filter, | |
| 56 | .prealloc_buffer_size = 131072, | |
| db5bf412 | 57 | }; |
| f0fba2ad | 58 | |
| 6f2032a1 | 59 | int devm_ep93xx_pcm_platform_register(struct device *dev) |
| f0fba2ad | 60 | { |
| 6f2032a1 | 61 | return devm_snd_dmaengine_pcm_register(dev, |
| e27e8a60 | 62 | &ep93xx_dmaengine_pcm_config, |
| e27e8a60 LPC |
63 | SND_DMAENGINE_PCM_FLAG_NO_DT | |
| 64 | SND_DMAENGINE_PCM_FLAG_COMPAT); | |
| f0fba2ad | 65 | } |
| 6f2032a1 | 66 | EXPORT_SYMBOL_GPL(devm_ep93xx_pcm_platform_register); |
| db5bf412 | 67 | |
| 1c5454ee | 68 | MODULE_AUTHOR("Ryan Mallon"); |
| db5bf412 RM |
69 | MODULE_DESCRIPTION("EP93xx ALSA PCM interface"); |
| 70 | MODULE_LICENSE("GPL"); |