diff options
Diffstat (limited to 'sound/soc/atmel/atmel-pcm.c')
-rw-r--r-- | sound/soc/atmel/atmel-pcm.c | 121 |
1 files changed, 0 insertions, 121 deletions
diff --git a/sound/soc/atmel/atmel-pcm.c b/sound/soc/atmel/atmel-pcm.c deleted file mode 100644 index 8ae3fa5ac60a..000000000000 --- a/sound/soc/atmel/atmel-pcm.c +++ /dev/null | |||
@@ -1,121 +0,0 @@ | |||
1 | /* | ||
2 | * atmel-pcm.c -- ALSA PCM interface for the Atmel atmel SoC. | ||
3 | * | ||
4 | * Copyright (C) 2005 SAN People | ||
5 | * Copyright (C) 2008 Atmel | ||
6 | * | ||
7 | * Authors: Sedji Gaouaou <sedji.gaouaou@atmel.com> | ||
8 | * | ||
9 | * Based on at91-pcm. by: | ||
10 | * Frank Mandarino <fmandarino@endrelia.com> | ||
11 | * Copyright 2006 Endrelia Technologies Inc. | ||
12 | * | ||
13 | * Based on pxa2xx-pcm.c by: | ||
14 | * | ||
15 | * Author: Nicolas Pitre | ||
16 | * Created: Nov 30, 2004 | ||
17 | * Copyright: (C) 2004 MontaVista Software, Inc. | ||
18 | * | ||
19 | * This program is free software; you can redistribute it and/or modify | ||
20 | * it under the terms of the GNU General Public License as published by | ||
21 | * the Free Software Foundation; either version 2 of the License, or | ||
22 | * (at your option) any later version. | ||
23 | * | ||
24 | * This program is distributed in the hope that it will be useful, | ||
25 | * but WITHOUT ANY WARRANTY; without even the implied warranty of | ||
26 | * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the | ||
27 | * GNU General Public License for more details. | ||
28 | * | ||
29 | * You should have received a copy of the GNU General Public License | ||
30 | * along with this program; if not, write to the Free Software | ||
31 | * Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA 02111-1307 USA | ||
32 | */ | ||
33 | |||
34 | #include <linux/module.h> | ||
35 | #include <linux/dma-mapping.h> | ||
36 | #include <sound/pcm.h> | ||
37 | #include <sound/soc.h> | ||
38 | #include "atmel-pcm.h" | ||
39 | |||
40 | static int atmel_pcm_preallocate_dma_buffer(struct snd_pcm *pcm, | ||
41 | int stream) | ||
42 | { | ||
43 | struct snd_pcm_substream *substream = pcm->streams[stream].substream; | ||
44 | struct snd_dma_buffer *buf = &substream->dma_buffer; | ||
45 | size_t size = ATMEL_SSC_DMABUF_SIZE; | ||
46 | |||
47 | buf->dev.type = SNDRV_DMA_TYPE_DEV; | ||
48 | buf->dev.dev = pcm->card->dev; | ||
49 | buf->private_data = NULL; | ||
50 | buf->area = dma_alloc_coherent(pcm->card->dev, size, | ||
51 | &buf->addr, GFP_KERNEL); | ||
52 | pr_debug("atmel-pcm: alloc dma buffer: area=%p, addr=%p, size=%zu\n", | ||
53 | (void *)buf->area, (void *)(long)buf->addr, size); | ||
54 | |||
55 | if (!buf->area) | ||
56 | return -ENOMEM; | ||
57 | |||
58 | buf->bytes = size; | ||
59 | return 0; | ||
60 | } | ||
61 | |||
62 | int atmel_pcm_mmap(struct snd_pcm_substream *substream, | ||
63 | struct vm_area_struct *vma) | ||
64 | { | ||
65 | return remap_pfn_range(vma, vma->vm_start, | ||
66 | substream->dma_buffer.addr >> PAGE_SHIFT, | ||
67 | vma->vm_end - vma->vm_start, vma->vm_page_prot); | ||
68 | } | ||
69 | EXPORT_SYMBOL_GPL(atmel_pcm_mmap); | ||
70 | |||
71 | int atmel_pcm_new(struct snd_soc_pcm_runtime *rtd) | ||
72 | { | ||
73 | struct snd_card *card = rtd->card->snd_card; | ||
74 | struct snd_pcm *pcm = rtd->pcm; | ||
75 | int ret; | ||
76 | |||
77 | ret = dma_coerce_mask_and_coherent(card->dev, DMA_BIT_MASK(32)); | ||
78 | if (ret) | ||
79 | return ret; | ||
80 | |||
81 | if (pcm->streams[SNDRV_PCM_STREAM_PLAYBACK].substream) { | ||
82 | pr_debug("atmel-pcm: allocating PCM playback DMA buffer\n"); | ||
83 | ret = atmel_pcm_preallocate_dma_buffer(pcm, | ||
84 | SNDRV_PCM_STREAM_PLAYBACK); | ||
85 | if (ret) | ||
86 | goto out; | ||
87 | } | ||
88 | |||
89 | if (pcm->streams[SNDRV_PCM_STREAM_CAPTURE].substream) { | ||
90 | pr_debug("atmel-pcm: allocating PCM capture DMA buffer\n"); | ||
91 | ret = atmel_pcm_preallocate_dma_buffer(pcm, | ||
92 | SNDRV_PCM_STREAM_CAPTURE); | ||
93 | if (ret) | ||
94 | goto out; | ||
95 | } | ||
96 | out: | ||
97 | return ret; | ||
98 | } | ||
99 | EXPORT_SYMBOL_GPL(atmel_pcm_new); | ||
100 | |||
101 | void atmel_pcm_free(struct snd_pcm *pcm) | ||
102 | { | ||
103 | struct snd_pcm_substream *substream; | ||
104 | struct snd_dma_buffer *buf; | ||
105 | int stream; | ||
106 | |||
107 | for (stream = 0; stream < 2; stream++) { | ||
108 | substream = pcm->streams[stream].substream; | ||
109 | if (!substream) | ||
110 | continue; | ||
111 | |||
112 | buf = &substream->dma_buffer; | ||
113 | if (!buf->area) | ||
114 | continue; | ||
115 | dma_free_coherent(pcm->card->dev, buf->bytes, | ||
116 | buf->area, buf->addr); | ||
117 | buf->area = NULL; | ||
118 | } | ||
119 | } | ||
120 | EXPORT_SYMBOL_GPL(atmel_pcm_free); | ||
121 | |||