1*4882a593Smuzhiyun // SPDX-License-Identifier: GPL-2.0-only
2*4882a593Smuzhiyun /*
3*4882a593Smuzhiyun * linux/sound/arm/ep93xx-pcm.c - EP93xx ALSA PCM interface
4*4882a593Smuzhiyun *
5*4882a593Smuzhiyun * Copyright (C) 2006 Lennert Buytenhek <buytenh@wantstofly.org>
6*4882a593Smuzhiyun * Copyright (C) 2006 Applied Data Systems
7*4882a593Smuzhiyun *
8*4882a593Smuzhiyun * Rewritten for the SoC audio subsystem (Based on PXA2xx code):
9*4882a593Smuzhiyun * Copyright (c) 2008 Ryan Mallon
10*4882a593Smuzhiyun */
11*4882a593Smuzhiyun
12*4882a593Smuzhiyun #include <linux/module.h>
13*4882a593Smuzhiyun #include <linux/init.h>
14*4882a593Smuzhiyun #include <linux/platform_device.h>
15*4882a593Smuzhiyun #include <linux/dmaengine.h>
16*4882a593Smuzhiyun
17*4882a593Smuzhiyun #include <sound/pcm.h>
18*4882a593Smuzhiyun #include <sound/soc.h>
19*4882a593Smuzhiyun #include <sound/dmaengine_pcm.h>
20*4882a593Smuzhiyun
21*4882a593Smuzhiyun #include <linux/platform_data/dma-ep93xx.h>
22*4882a593Smuzhiyun
23*4882a593Smuzhiyun #include "ep93xx-pcm.h"
24*4882a593Smuzhiyun
25*4882a593Smuzhiyun static const struct snd_pcm_hardware ep93xx_pcm_hardware = {
26*4882a593Smuzhiyun .info = (SNDRV_PCM_INFO_MMAP |
27*4882a593Smuzhiyun SNDRV_PCM_INFO_MMAP_VALID |
28*4882a593Smuzhiyun SNDRV_PCM_INFO_INTERLEAVED |
29*4882a593Smuzhiyun SNDRV_PCM_INFO_BLOCK_TRANSFER),
30*4882a593Smuzhiyun .buffer_bytes_max = 131072,
31*4882a593Smuzhiyun .period_bytes_min = 32,
32*4882a593Smuzhiyun .period_bytes_max = 32768,
33*4882a593Smuzhiyun .periods_min = 1,
34*4882a593Smuzhiyun .periods_max = 32,
35*4882a593Smuzhiyun .fifo_size = 32,
36*4882a593Smuzhiyun };
37*4882a593Smuzhiyun
ep93xx_pcm_dma_filter(struct dma_chan * chan,void * filter_param)38*4882a593Smuzhiyun static bool ep93xx_pcm_dma_filter(struct dma_chan *chan, void *filter_param)
39*4882a593Smuzhiyun {
40*4882a593Smuzhiyun struct ep93xx_dma_data *data = filter_param;
41*4882a593Smuzhiyun
42*4882a593Smuzhiyun if (data->direction == ep93xx_dma_chan_direction(chan)) {
43*4882a593Smuzhiyun chan->private = data;
44*4882a593Smuzhiyun return true;
45*4882a593Smuzhiyun }
46*4882a593Smuzhiyun
47*4882a593Smuzhiyun return false;
48*4882a593Smuzhiyun }
49*4882a593Smuzhiyun
50*4882a593Smuzhiyun static const struct snd_dmaengine_pcm_config ep93xx_dmaengine_pcm_config = {
51*4882a593Smuzhiyun .pcm_hardware = &ep93xx_pcm_hardware,
52*4882a593Smuzhiyun .compat_filter_fn = ep93xx_pcm_dma_filter,
53*4882a593Smuzhiyun .prealloc_buffer_size = 131072,
54*4882a593Smuzhiyun };
55*4882a593Smuzhiyun
devm_ep93xx_pcm_platform_register(struct device * dev)56*4882a593Smuzhiyun int devm_ep93xx_pcm_platform_register(struct device *dev)
57*4882a593Smuzhiyun {
58*4882a593Smuzhiyun return devm_snd_dmaengine_pcm_register(dev,
59*4882a593Smuzhiyun &ep93xx_dmaengine_pcm_config,
60*4882a593Smuzhiyun SND_DMAENGINE_PCM_FLAG_NO_DT |
61*4882a593Smuzhiyun SND_DMAENGINE_PCM_FLAG_COMPAT);
62*4882a593Smuzhiyun }
63*4882a593Smuzhiyun EXPORT_SYMBOL_GPL(devm_ep93xx_pcm_platform_register);
64*4882a593Smuzhiyun
65*4882a593Smuzhiyun MODULE_AUTHOR("Ryan Mallon");
66*4882a593Smuzhiyun MODULE_DESCRIPTION("EP93xx ALSA PCM interface");
67*4882a593Smuzhiyun MODULE_LICENSE("GPL");
68