Root/
1 | /* |
2 | * linux/sound/arm/pxa2xx-pcm.c -- ALSA PCM interface for the Intel PXA2xx chip |
3 | * |
4 | * Author: Nicolas Pitre |
5 | * Created: Nov 30, 2004 |
6 | * Copyright: (C) 2004 MontaVista Software, Inc. |
7 | * |
8 | * This program is free software; you can redistribute it and/or modify |
9 | * it under the terms of the GNU General Public License version 2 as |
10 | * published by the Free Software Foundation. |
11 | */ |
12 | |
13 | #include <sound/core.h> |
14 | #include <sound/pxa2xx-lib.h> |
15 | |
16 | #include "pxa2xx-pcm.h" |
17 | |
18 | static int pxa2xx_pcm_prepare(struct snd_pcm_substream *substream) |
19 | { |
20 | struct pxa2xx_pcm_client *client = substream->private_data; |
21 | |
22 | __pxa2xx_pcm_prepare(substream); |
23 | |
24 | return client->prepare(substream); |
25 | } |
26 | |
27 | static int pxa2xx_pcm_open(struct snd_pcm_substream *substream) |
28 | { |
29 | struct pxa2xx_pcm_client *client = substream->private_data; |
30 | struct snd_pcm_runtime *runtime = substream->runtime; |
31 | struct pxa2xx_runtime_data *rtd; |
32 | int ret; |
33 | |
34 | ret = __pxa2xx_pcm_open(substream); |
35 | if (ret) |
36 | goto out; |
37 | |
38 | rtd = runtime->private_data; |
39 | |
40 | rtd->params = (substream->stream == SNDRV_PCM_STREAM_PLAYBACK) ? |
41 | client->playback_params : client->capture_params; |
42 | ret = pxa_request_dma(rtd->params->name, DMA_PRIO_LOW, |
43 | pxa2xx_pcm_dma_irq, substream); |
44 | if (ret < 0) |
45 | goto err2; |
46 | rtd->dma_ch = ret; |
47 | |
48 | ret = client->startup(substream); |
49 | if (!ret) |
50 | goto out; |
51 | |
52 | pxa_free_dma(rtd->dma_ch); |
53 | err2: |
54 | __pxa2xx_pcm_close(substream); |
55 | out: |
56 | return ret; |
57 | } |
58 | |
59 | static int pxa2xx_pcm_close(struct snd_pcm_substream *substream) |
60 | { |
61 | struct pxa2xx_pcm_client *client = substream->private_data; |
62 | struct pxa2xx_runtime_data *rtd = substream->runtime->private_data; |
63 | |
64 | pxa_free_dma(rtd->dma_ch); |
65 | client->shutdown(substream); |
66 | |
67 | return __pxa2xx_pcm_close(substream); |
68 | } |
69 | |
70 | static struct snd_pcm_ops pxa2xx_pcm_ops = { |
71 | .open = pxa2xx_pcm_open, |
72 | .close = pxa2xx_pcm_close, |
73 | .ioctl = snd_pcm_lib_ioctl, |
74 | .hw_params = __pxa2xx_pcm_hw_params, |
75 | .hw_free = __pxa2xx_pcm_hw_free, |
76 | .prepare = pxa2xx_pcm_prepare, |
77 | .trigger = pxa2xx_pcm_trigger, |
78 | .pointer = pxa2xx_pcm_pointer, |
79 | .mmap = pxa2xx_pcm_mmap, |
80 | }; |
81 | |
82 | static u64 pxa2xx_pcm_dmamask = 0xffffffff; |
83 | |
84 | int pxa2xx_pcm_new(struct snd_card *card, struct pxa2xx_pcm_client *client, |
85 | struct snd_pcm **rpcm) |
86 | { |
87 | struct snd_pcm *pcm; |
88 | int play = client->playback_params ? 1 : 0; |
89 | int capt = client->capture_params ? 1 : 0; |
90 | int ret; |
91 | |
92 | ret = snd_pcm_new(card, "PXA2xx-PCM", 0, play, capt, &pcm); |
93 | if (ret) |
94 | goto out; |
95 | |
96 | pcm->private_data = client; |
97 | pcm->private_free = pxa2xx_pcm_free_dma_buffers; |
98 | |
99 | if (!card->dev->dma_mask) |
100 | card->dev->dma_mask = &pxa2xx_pcm_dmamask; |
101 | if (!card->dev->coherent_dma_mask) |
102 | card->dev->coherent_dma_mask = 0xffffffff; |
103 | |
104 | if (play) { |
105 | int stream = SNDRV_PCM_STREAM_PLAYBACK; |
106 | snd_pcm_set_ops(pcm, stream, &pxa2xx_pcm_ops); |
107 | ret = pxa2xx_pcm_preallocate_dma_buffer(pcm, stream); |
108 | if (ret) |
109 | goto out; |
110 | } |
111 | if (capt) { |
112 | int stream = SNDRV_PCM_STREAM_CAPTURE; |
113 | snd_pcm_set_ops(pcm, stream, &pxa2xx_pcm_ops); |
114 | ret = pxa2xx_pcm_preallocate_dma_buffer(pcm, stream); |
115 | if (ret) |
116 | goto out; |
117 | } |
118 | |
119 | if (rpcm) |
120 | *rpcm = pcm; |
121 | ret = 0; |
122 | |
123 | out: |
124 | return ret; |
125 | } |
126 | |
127 | EXPORT_SYMBOL(pxa2xx_pcm_new); |
128 | |
129 | MODULE_AUTHOR("Nicolas Pitre"); |
130 | MODULE_DESCRIPTION("Intel PXA2xx PCM DMA module"); |
131 | MODULE_LICENSE("GPL"); |
132 |
Branches:
ben-wpan
ben-wpan-stefan
javiroman/ks7010
jz-2.6.34
jz-2.6.34-rc5
jz-2.6.34-rc6
jz-2.6.34-rc7
jz-2.6.35
jz-2.6.36
jz-2.6.37
jz-2.6.38
jz-2.6.39
jz-3.0
jz-3.1
jz-3.11
jz-3.12
jz-3.13
jz-3.15
jz-3.16
jz-3.18-dt
jz-3.2
jz-3.3
jz-3.4
jz-3.5
jz-3.6
jz-3.6-rc2-pwm
jz-3.9
jz-3.9-clk
jz-3.9-rc8
jz47xx
jz47xx-2.6.38
master
Tags:
od-2011-09-04
od-2011-09-18
v2.6.34-rc5
v2.6.34-rc6
v2.6.34-rc7
v3.9