diff options
Diffstat (limited to 'sound/arm/devdma.c')
-rw-r--r-- | sound/arm/devdma.c | 80 |
1 files changed, 0 insertions, 80 deletions
diff --git a/sound/arm/devdma.c b/sound/arm/devdma.c deleted file mode 100644 index 9d1e6665b546..000000000000 --- a/sound/arm/devdma.c +++ /dev/null | |||
@@ -1,80 +0,0 @@ | |||
1 | /* | ||
2 | * linux/sound/arm/devdma.c | ||
3 | * | ||
4 | * Copyright (C) 2003-2004 Russell King, All rights reserved. | ||
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 version 2 as | ||
8 | * published by the Free Software Foundation. | ||
9 | * | ||
10 | * ARM DMA shim for ALSA. | ||
11 | */ | ||
12 | #include <linux/device.h> | ||
13 | #include <linux/dma-mapping.h> | ||
14 | |||
15 | #include <sound/core.h> | ||
16 | #include <sound/pcm.h> | ||
17 | |||
18 | #include "devdma.h" | ||
19 | |||
20 | void devdma_hw_free(struct device *dev, struct snd_pcm_substream *substream) | ||
21 | { | ||
22 | struct snd_pcm_runtime *runtime = substream->runtime; | ||
23 | struct snd_dma_buffer *buf = runtime->dma_buffer_p; | ||
24 | |||
25 | if (runtime->dma_area == NULL) | ||
26 | return; | ||
27 | |||
28 | if (buf != &substream->dma_buffer) { | ||
29 | dma_free_coherent(buf->dev.dev, buf->bytes, buf->area, buf->addr); | ||
30 | kfree(runtime->dma_buffer_p); | ||
31 | } | ||
32 | |||
33 | snd_pcm_set_runtime_buffer(substream, NULL); | ||
34 | } | ||
35 | |||
36 | int devdma_hw_alloc(struct device *dev, struct snd_pcm_substream *substream, size_t size) | ||
37 | { | ||
38 | struct snd_pcm_runtime *runtime = substream->runtime; | ||
39 | struct snd_dma_buffer *buf = runtime->dma_buffer_p; | ||
40 | int ret = 0; | ||
41 | |||
42 | if (buf) { | ||
43 | if (buf->bytes >= size) | ||
44 | goto out; | ||
45 | devdma_hw_free(dev, substream); | ||
46 | } | ||
47 | |||
48 | if (substream->dma_buffer.area != NULL && substream->dma_buffer.bytes >= size) { | ||
49 | buf = &substream->dma_buffer; | ||
50 | } else { | ||
51 | buf = kmalloc(sizeof(struct snd_dma_buffer), GFP_KERNEL); | ||
52 | if (!buf) | ||
53 | goto nomem; | ||
54 | |||
55 | buf->dev.type = SNDRV_DMA_TYPE_DEV; | ||
56 | buf->dev.dev = dev; | ||
57 | buf->area = dma_alloc_coherent(dev, size, &buf->addr, GFP_KERNEL); | ||
58 | buf->bytes = size; | ||
59 | buf->private_data = NULL; | ||
60 | |||
61 | if (!buf->area) | ||
62 | goto free; | ||
63 | } | ||
64 | snd_pcm_set_runtime_buffer(substream, buf); | ||
65 | ret = 1; | ||
66 | out: | ||
67 | runtime->dma_bytes = size; | ||
68 | return ret; | ||
69 | |||
70 | free: | ||
71 | kfree(buf); | ||
72 | nomem: | ||
73 | return -ENOMEM; | ||
74 | } | ||
75 | |||
76 | int devdma_mmap(struct device *dev, struct snd_pcm_substream *substream, struct vm_area_struct *vma) | ||
77 | { | ||
78 | struct snd_pcm_runtime *runtime = substream->runtime; | ||
79 | return dma_mmap_coherent(dev, vma, runtime->dma_area, runtime->dma_addr, runtime->dma_bytes); | ||
80 | } | ||