1 /*
2 * Copyright (C) 2011 Freescale Semiconductor, Inc. All Rights Reserved.
3 *
4 * Based on sound/soc/imx/imx-pcm-dma-mx2.c
5 *
6 * This program is free software; you can redistribute it and/or modify
7 * it under the terms of the GNU General Public License as published by
8 * the Free Software Foundation; either version 2 of the License, or
9 * (at your option) any later version.
10 *
11 * This program is distributed in the hope that it will be useful,
12 * but WITHOUT ANY WARRANTY; without even the implied warranty of
13 * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
14 * GNU General Public License for more details.
15 *
16 * You should have received a copy of the GNU General Public License along
17 * with this program; if not, write to the Free Software Foundation, Inc.,
18 * 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301 USA.
19 */
20
21 #include <linux/device.h>
22 #include <linux/init.h>
23 #include <linux/module.h>
24
25 #include <sound/core.h>
26 #include <sound/pcm.h>
27 #include <sound/soc.h>
28 #include <sound/dmaengine_pcm.h>
29
30 #include "mxs-pcm.h"
31
32 static const struct snd_pcm_hardware snd_mxs_hardware = {
33 .info = SNDRV_PCM_INFO_MMAP |
34 SNDRV_PCM_INFO_MMAP_VALID |
35 SNDRV_PCM_INFO_PAUSE |
36 SNDRV_PCM_INFO_RESUME |
37 SNDRV_PCM_INFO_INTERLEAVED |
38 SNDRV_PCM_INFO_HALF_DUPLEX,
39 .period_bytes_min = 32,
40 .period_bytes_max = 8192,
41 .periods_min = 1,
42 .periods_max = 52,
43 .buffer_bytes_max = 64 * 1024,
44 .fifo_size = 32,
45 };
46
47 static const struct snd_dmaengine_pcm_config mxs_dmaengine_pcm_config = {
48 .pcm_hardware = &snd_mxs_hardware,
49 .prealloc_buffer_size = 64 * 1024,
50 };
51
mxs_pcm_platform_register(struct device * dev)52 int mxs_pcm_platform_register(struct device *dev)
53 {
54 return devm_snd_dmaengine_pcm_register(dev, &mxs_dmaengine_pcm_config,
55 SND_DMAENGINE_PCM_FLAG_HALF_DUPLEX);
56 }
57 EXPORT_SYMBOL_GPL(mxs_pcm_platform_register);
58
59 MODULE_LICENSE("GPL");
60
