1 | /* |
2 | * ALSA PCM interface for ST SPEAr Processors |
3 | * |
4 | * sound/soc/spear/spear_pcm.c |
5 | * |
6 | * Copyright (C) 2012 ST Microelectronics |
7 | * Rajeev Kumar<rajeevkumar.linux@gmail.com> |
8 | * |
9 | * This file is licensed under the terms of the GNU General Public |
10 | * License version 2. This program is licensed "as is" without any |
11 | * warranty of any kind, whether express or implied. |
12 | */ |
13 | |
14 | #include <linux/module.h> |
15 | #include <linux/dmaengine.h> |
16 | #include <linux/platform_device.h> |
17 | #include <sound/dmaengine_pcm.h> |
18 | #include <sound/pcm.h> |
19 | #include <sound/soc.h> |
20 | #include <sound/spear_dma.h> |
21 | #include "spear_pcm.h" |
22 | |
23 | static const struct snd_pcm_hardware spear_pcm_hardware = { |
24 | .info = (SNDRV_PCM_INFO_INTERLEAVED | SNDRV_PCM_INFO_BLOCK_TRANSFER | |
25 | SNDRV_PCM_INFO_MMAP | SNDRV_PCM_INFO_MMAP_VALID | |
26 | SNDRV_PCM_INFO_PAUSE | SNDRV_PCM_INFO_RESUME), |
27 | .buffer_bytes_max = 16 * 1024, /* max buffer size */ |
28 | .period_bytes_min = 2 * 1024, /* 1 msec data minimum period size */ |
29 | .period_bytes_max = 2 * 1024, /* maximum period size */ |
30 | .periods_min = 1, /* min # periods */ |
31 | .periods_max = 8, /* max # of periods */ |
32 | .fifo_size = 0, /* fifo size in bytes */ |
33 | }; |
34 | |
35 | static const struct snd_dmaengine_pcm_config spear_dmaengine_pcm_config = { |
36 | .pcm_hardware = &spear_pcm_hardware, |
37 | .prealloc_buffer_size = 16 * 1024, |
38 | }; |
39 | |
40 | int devm_spear_pcm_platform_register(struct device *dev, |
41 | struct snd_dmaengine_pcm_config *config, |
42 | bool (*filter)(struct dma_chan *chan, void *slave)) |
43 | { |
44 | *config = spear_dmaengine_pcm_config; |
45 | config->compat_filter_fn = filter; |
46 | |
47 | return devm_snd_dmaengine_pcm_register(dev, config, |
48 | SND_DMAENGINE_PCM_FLAG_NO_DT | |
49 | SND_DMAENGINE_PCM_FLAG_COMPAT); |
50 | } |
51 | EXPORT_SYMBOL_GPL(devm_spear_pcm_platform_register); |
52 | |
53 | MODULE_AUTHOR("Rajeev Kumar <rajeevkumar.linux@gmail.com>" ); |
54 | MODULE_DESCRIPTION("SPEAr PCM DMA module" ); |
55 | MODULE_LICENSE("GPL" ); |
56 | |