Dong Aisheng | ed6e1d0 | 2011-07-21 12:36:55 +0800 | [diff] [blame] | 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 | |
Dong Aisheng | ed6e1d0 | 2011-07-21 12:36:55 +0800 | [diff] [blame] | 21 | #include <linux/device.h> |
Dong Aisheng | ed6e1d0 | 2011-07-21 12:36:55 +0800 | [diff] [blame] | 22 | #include <linux/init.h> |
Dong Aisheng | ed6e1d0 | 2011-07-21 12:36:55 +0800 | [diff] [blame] | 23 | #include <linux/module.h> |
Dong Aisheng | ed6e1d0 | 2011-07-21 12:36:55 +0800 | [diff] [blame] | 24 | |
| 25 | #include <sound/core.h> |
Dong Aisheng | ed6e1d0 | 2011-07-21 12:36:55 +0800 | [diff] [blame] | 26 | #include <sound/pcm.h> |
Dong Aisheng | ed6e1d0 | 2011-07-21 12:36:55 +0800 | [diff] [blame] | 27 | #include <sound/soc.h> |
Lars-Peter Clausen | 016ab46 | 2012-02-22 10:49:10 +0100 | [diff] [blame] | 28 | #include <sound/dmaengine_pcm.h> |
Dong Aisheng | ed6e1d0 | 2011-07-21 12:36:55 +0800 | [diff] [blame] | 29 | |
Dong Aisheng | ed6e1d0 | 2011-07-21 12:36:55 +0800 | [diff] [blame] | 30 | #include "mxs-pcm.h" |
| 31 | |
Lars-Peter Clausen | a895690 | 2013-04-20 19:29:03 +0200 | [diff] [blame] | 32 | static const struct snd_pcm_hardware snd_mxs_hardware = { |
Dong Aisheng | ed6e1d0 | 2011-07-21 12:36:55 +0800 | [diff] [blame] | 33 | .info = SNDRV_PCM_INFO_MMAP | |
| 34 | SNDRV_PCM_INFO_MMAP_VALID | |
| 35 | SNDRV_PCM_INFO_PAUSE | |
| 36 | SNDRV_PCM_INFO_RESUME | |
Lars-Peter Clausen | 57364f9 | 2013-04-20 19:29:01 +0200 | [diff] [blame] | 37 | SNDRV_PCM_INFO_INTERLEAVED | |
| 38 | SNDRV_PCM_INFO_HALF_DUPLEX, |
Dong Aisheng | ed6e1d0 | 2011-07-21 12:36:55 +0800 | [diff] [blame] | 39 | .formats = SNDRV_PCM_FMTBIT_S16_LE | |
| 40 | SNDRV_PCM_FMTBIT_S20_3LE | |
| 41 | SNDRV_PCM_FMTBIT_S24_LE, |
| 42 | .channels_min = 2, |
| 43 | .channels_max = 2, |
| 44 | .period_bytes_min = 32, |
| 45 | .period_bytes_max = 8192, |
| 46 | .periods_min = 1, |
| 47 | .periods_max = 52, |
| 48 | .buffer_bytes_max = 64 * 1024, |
| 49 | .fifo_size = 32, |
Dong Aisheng | ed6e1d0 | 2011-07-21 12:36:55 +0800 | [diff] [blame] | 50 | }; |
| 51 | |
Dong Aisheng | ed6e1d0 | 2011-07-21 12:36:55 +0800 | [diff] [blame] | 52 | static bool filter(struct dma_chan *chan, void *param) |
| 53 | { |
Lars-Peter Clausen | b7e5e91 | 2013-03-22 14:12:13 +0100 | [diff] [blame] | 54 | struct mxs_pcm_dma_params *dma_params = param; |
Dong Aisheng | ed6e1d0 | 2011-07-21 12:36:55 +0800 | [diff] [blame] | 55 | |
| 56 | if (!mxs_dma_is_apbx(chan)) |
| 57 | return false; |
| 58 | |
| 59 | if (chan->chan_id != dma_params->chan_num) |
| 60 | return false; |
| 61 | |
Lars-Peter Clausen | b7e5e91 | 2013-03-22 14:12:13 +0100 | [diff] [blame] | 62 | chan->private = &dma_params->dma_data; |
Dong Aisheng | ed6e1d0 | 2011-07-21 12:36:55 +0800 | [diff] [blame] | 63 | |
| 64 | return true; |
| 65 | } |
| 66 | |
Lars-Peter Clausen | a895690 | 2013-04-20 19:29:03 +0200 | [diff] [blame] | 67 | static const struct snd_dmaengine_pcm_config mxs_dmaengine_pcm_config = { |
| 68 | .pcm_hardware = &snd_mxs_hardware, |
| 69 | .compat_filter_fn = filter, |
| 70 | .prealloc_buffer_size = 64 * 1024, |
Dong Aisheng | ed6e1d0 | 2011-07-21 12:36:55 +0800 | [diff] [blame] | 71 | }; |
| 72 | |
Bill Pemberton | fd58273 | 2012-12-07 09:26:27 -0500 | [diff] [blame] | 73 | int mxs_pcm_platform_register(struct device *dev) |
Dong Aisheng | ed6e1d0 | 2011-07-21 12:36:55 +0800 | [diff] [blame] | 74 | { |
Lars-Peter Clausen | a895690 | 2013-04-20 19:29:03 +0200 | [diff] [blame] | 75 | return snd_dmaengine_pcm_register(dev, &mxs_dmaengine_pcm_config, |
| 76 | SND_DMAENGINE_PCM_FLAG_NO_RESIDUE | |
| 77 | SND_DMAENGINE_PCM_FLAG_NO_DT | |
| 78 | SND_DMAENGINE_PCM_FLAG_COMPAT | |
| 79 | SND_DMAENGINE_PCM_FLAG_HALF_DUPLEX); |
Dong Aisheng | ed6e1d0 | 2011-07-21 12:36:55 +0800 | [diff] [blame] | 80 | } |
Shawn Guo | 4da3fe7 | 2012-05-11 22:24:16 +0800 | [diff] [blame] | 81 | EXPORT_SYMBOL_GPL(mxs_pcm_platform_register); |
Dong Aisheng | ed6e1d0 | 2011-07-21 12:36:55 +0800 | [diff] [blame] | 82 | |
Bill Pemberton | fd58273 | 2012-12-07 09:26:27 -0500 | [diff] [blame] | 83 | void mxs_pcm_platform_unregister(struct device *dev) |
Dong Aisheng | ed6e1d0 | 2011-07-21 12:36:55 +0800 | [diff] [blame] | 84 | { |
Lars-Peter Clausen | a895690 | 2013-04-20 19:29:03 +0200 | [diff] [blame] | 85 | snd_dmaengine_pcm_unregister(dev); |
Dong Aisheng | ed6e1d0 | 2011-07-21 12:36:55 +0800 | [diff] [blame] | 86 | } |
Shawn Guo | 4da3fe7 | 2012-05-11 22:24:16 +0800 | [diff] [blame] | 87 | EXPORT_SYMBOL_GPL(mxs_pcm_platform_unregister); |
Lothar Waßmann | 06c8eb9 | 2011-12-09 14:38:11 +0100 | [diff] [blame] | 88 | |
| 89 | MODULE_LICENSE("GPL"); |