projects / deliverable / linux.git / blame
| Commit | Line | Data |
|---|---|---|
| 58726f58 PU |
1 | /* |
| 2 | * edma-pcm.c - eDMA PCM driver using dmaengine for AM3xxx, AM4xxx | |
| 3 | * | |
| 4 | * Copyright (C) 2014 Texas Instruments, Inc. | |
| 5 | * | |
| 6 | * Author: Peter Ujfalusi <peter.ujfalusi@ti.com> | |
| 7 | * | |
| 8 | * Based on: sound/soc/tegra/tegra_pcm.c | |
| 9 | * | |
| 10 | * This program is free software; you can redistribute it and/or | |
| 11 | * modify it under the terms of the GNU General Public License | |
| 12 | * version 2 as published by the Free Software Foundation. | |
| 13 | * | |
| 14 | * This program is distributed in the hope that it will be useful, but | |
| 15 | * WITHOUT ANY WARRANTY; without even the implied warranty of | |
| 16 | * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU | |
| 17 | * General Public License for more details. | |
| 18 | */ | |
| 19 | ||
| 20 | #include <linux/module.h> | |
| 21 | #include <sound/core.h> | |
| 22 | #include <sound/pcm.h> | |
| 23 | #include <sound/pcm_params.h> | |
| 24 | #include <sound/soc.h> | |
| 25 | #include <sound/dmaengine_pcm.h> | |
| 26 | #include <linux/edma.h> | |
| 27 | ||
| 371e07ec LPC |
28 | #include "edma-pcm.h" |
| 29 | ||
| 58726f58 PU |
30 | static const struct snd_pcm_hardware edma_pcm_hardware = { |
| 31 | .info = SNDRV_PCM_INFO_MMAP | | |
| 32 | SNDRV_PCM_INFO_MMAP_VALID | | |
| 58726f58 | 33 | SNDRV_PCM_INFO_PAUSE | SNDRV_PCM_INFO_RESUME | |
| 24600b54 | 34 | SNDRV_PCM_INFO_NO_PERIOD_WAKEUP | |
| 58726f58 PU |
35 | SNDRV_PCM_INFO_INTERLEAVED, |
| 36 | .buffer_bytes_max = 128 * 1024, | |
| 37 | .period_bytes_min = 32, | |
| 38 | .period_bytes_max = 64 * 1024, | |
| 39 | .periods_min = 2, | |
| 40 | .periods_max = 19, /* Limit by edma dmaengine driver */ | |
| 41 | }; | |
| 42 | ||
| 43 | static const struct snd_dmaengine_pcm_config edma_dmaengine_pcm_config = { | |
| 44 | .pcm_hardware = &edma_pcm_hardware, | |
| 45 | .prepare_slave_config = snd_dmaengine_pcm_prepare_slave_config, | |
| 46 | .compat_filter_fn = edma_filter_fn, | |
| 47 | .prealloc_buffer_size = 128 * 1024, | |
| 48 | }; | |
| 49 | ||
| 50 | int edma_pcm_platform_register(struct device *dev) | |
| 51 | { | |
| 52 | return devm_snd_dmaengine_pcm_register(dev, &edma_dmaengine_pcm_config, | |
| 53 | SND_DMAENGINE_PCM_FLAG_COMPAT); | |
| 54 | } | |
| 55 | EXPORT_SYMBOL_GPL(edma_pcm_platform_register); | |
| 56 | ||
| 57 | MODULE_AUTHOR("Peter Ujfalusi <peter.ujfalusi@ti.com>"); | |
| 58 | MODULE_DESCRIPTION("eDMA PCM ASoC platform driver"); | |
| 59 | MODULE_LICENSE("GPL"); |