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7605eb5b SW |
1 | /* |
2 | * tegra_pcm.c - Tegra PCM driver | |
3 | * | |
4 | * Author: Stephen Warren <swarren@nvidia.com> | |
518de86b | 5 | * Copyright (C) 2010,2012 - NVIDIA, Inc. |
7605eb5b SW |
6 | * |
7 | * Based on code copyright/by: | |
8 | * | |
9 | * Copyright (c) 2009-2010, NVIDIA Corporation. | |
10 | * Scott Peterson <speterson@nvidia.com> | |
11 | * Vijay Mali <vmali@nvidia.com> | |
12 | * | |
13 | * Copyright (C) 2010 Google, Inc. | |
14 | * Iliyan Malchev <malchev@google.com> | |
15 | * | |
16 | * This program is free software; you can redistribute it and/or | |
17 | * modify it under the terms of the GNU General Public License | |
18 | * version 2 as published by the Free Software Foundation. | |
19 | * | |
20 | * This program is distributed in the hope that it will be useful, but | |
21 | * WITHOUT ANY WARRANTY; without even the implied warranty of | |
22 | * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU | |
23 | * General Public License for more details. | |
24 | * | |
25 | * You should have received a copy of the GNU General Public License | |
26 | * along with this program; if not, write to the Free Software | |
27 | * Foundation, Inc., 51 Franklin St, Fifth Floor, Boston, MA | |
28 | * 02110-1301 USA | |
29 | * | |
30 | */ | |
31 | ||
7613c508 | 32 | #include <linux/module.h> |
7605eb5b SW |
33 | #include <sound/core.h> |
34 | #include <sound/pcm.h> | |
35 | #include <sound/pcm_params.h> | |
36 | #include <sound/soc.h> | |
df79f55d | 37 | #include <sound/dmaengine_pcm.h> |
7605eb5b SW |
38 | |
39 | #include "tegra_pcm.h" | |
40 | ||
41 | static const struct snd_pcm_hardware tegra_pcm_hardware = { | |
42 | .info = SNDRV_PCM_INFO_MMAP | | |
43 | SNDRV_PCM_INFO_MMAP_VALID | | |
7605eb5b | 44 | SNDRV_PCM_INFO_INTERLEAVED, |
7605eb5b SW |
45 | .period_bytes_min = 1024, |
46 | .period_bytes_max = PAGE_SIZE, | |
47 | .periods_min = 2, | |
48 | .periods_max = 8, | |
49 | .buffer_bytes_max = PAGE_SIZE * 8, | |
50 | .fifo_size = 4, | |
51 | }; | |
52 | ||
11a8576a LPC |
53 | static const struct snd_dmaengine_pcm_config tegra_dmaengine_pcm_config = { |
54 | .pcm_hardware = &tegra_pcm_hardware, | |
55 | .prepare_slave_config = snd_dmaengine_pcm_prepare_slave_config, | |
11a8576a | 56 | .prealloc_buffer_size = PAGE_SIZE * 8, |
7605eb5b SW |
57 | }; |
58 | ||
4652a0d0 | 59 | int tegra_pcm_platform_register(struct device *dev) |
7605eb5b | 60 | { |
5608bd3e | 61 | return snd_dmaengine_pcm_register(dev, &tegra_dmaengine_pcm_config, 0); |
7605eb5b | 62 | } |
518de86b | 63 | EXPORT_SYMBOL_GPL(tegra_pcm_platform_register); |
7605eb5b | 64 | |
5608bd3e SW |
65 | int tegra_pcm_platform_register_with_chan_names(struct device *dev, |
66 | struct snd_dmaengine_pcm_config *config, | |
67 | char *txdmachan, char *rxdmachan) | |
68 | { | |
69 | *config = tegra_dmaengine_pcm_config; | |
70 | config->dma_dev = dev->parent; | |
71 | config->chan_names[0] = txdmachan; | |
72 | config->chan_names[1] = rxdmachan; | |
73 | ||
74 | return snd_dmaengine_pcm_register(dev, config, 0); | |
75 | } | |
76 | EXPORT_SYMBOL_GPL(tegra_pcm_platform_register_with_chan_names); | |
77 | ||
4652a0d0 | 78 | void tegra_pcm_platform_unregister(struct device *dev) |
7605eb5b | 79 | { |
11a8576a | 80 | return snd_dmaengine_pcm_unregister(dev); |
7605eb5b | 81 | } |
518de86b | 82 | EXPORT_SYMBOL_GPL(tegra_pcm_platform_unregister); |
7605eb5b SW |
83 | |
84 | MODULE_AUTHOR("Stephen Warren <swarren@nvidia.com>"); | |
85 | MODULE_DESCRIPTION("Tegra PCM ASoC driver"); | |
86 | MODULE_LICENSE("GPL"); |