Commit | Line | Data |
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2c484df0 TI |
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 | ||
da155d5b | 13 | #include <linux/module.h> |
2c484df0 | 14 | #include <sound/core.h> |
a6d77317 | 15 | #include <sound/pxa2xx-lib.h> |
2c484df0 TI |
16 | |
17 | #include "pxa2xx-pcm.h" | |
18 | ||
d18f8376 | 19 | static int pxa2xx_pcm_prepare(struct snd_pcm_substream *substream) |
2c484df0 | 20 | { |
d18f8376 | 21 | struct pxa2xx_pcm_client *client = substream->private_data; |
2c484df0 | 22 | |
a6d77317 | 23 | __pxa2xx_pcm_prepare(substream); |
2c484df0 TI |
24 | |
25 | return client->prepare(substream); | |
26 | } | |
27 | ||
d18f8376 | 28 | static int pxa2xx_pcm_open(struct snd_pcm_substream *substream) |
2c484df0 | 29 | { |
d18f8376 TI |
30 | struct pxa2xx_pcm_client *client = substream->private_data; |
31 | struct snd_pcm_runtime *runtime = substream->runtime; | |
2c484df0 TI |
32 | struct pxa2xx_runtime_data *rtd; |
33 | int ret; | |
34 | ||
a6d77317 | 35 | ret = __pxa2xx_pcm_open(substream); |
2c484df0 TI |
36 | if (ret) |
37 | goto out; | |
38 | ||
a6d77317 | 39 | rtd = runtime->private_data; |
2c484df0 TI |
40 | |
41 | rtd->params = (substream->stream == SNDRV_PCM_STREAM_PLAYBACK) ? | |
42 | client->playback_params : client->capture_params; | |
43 | ret = pxa_request_dma(rtd->params->name, DMA_PRIO_LOW, | |
44 | pxa2xx_pcm_dma_irq, substream); | |
45 | if (ret < 0) | |
46 | goto err2; | |
47 | rtd->dma_ch = ret; | |
48 | ||
2c484df0 TI |
49 | ret = client->startup(substream); |
50 | if (!ret) | |
51 | goto out; | |
52 | ||
53 | pxa_free_dma(rtd->dma_ch); | |
54 | err2: | |
a6d77317 | 55 | __pxa2xx_pcm_close(substream); |
2c484df0 TI |
56 | out: |
57 | return ret; | |
58 | } | |
59 | ||
d18f8376 | 60 | static int pxa2xx_pcm_close(struct snd_pcm_substream *substream) |
2c484df0 | 61 | { |
d18f8376 | 62 | struct pxa2xx_pcm_client *client = substream->private_data; |
2c484df0 TI |
63 | struct pxa2xx_runtime_data *rtd = substream->runtime->private_data; |
64 | ||
65 | pxa_free_dma(rtd->dma_ch); | |
66 | client->shutdown(substream); | |
2c484df0 | 67 | |
a6d77317 | 68 | return __pxa2xx_pcm_close(substream); |
2c484df0 TI |
69 | } |
70 | ||
d18f8376 | 71 | static struct snd_pcm_ops pxa2xx_pcm_ops = { |
2c484df0 TI |
72 | .open = pxa2xx_pcm_open, |
73 | .close = pxa2xx_pcm_close, | |
74 | .ioctl = snd_pcm_lib_ioctl, | |
a6d77317 DB |
75 | .hw_params = __pxa2xx_pcm_hw_params, |
76 | .hw_free = __pxa2xx_pcm_hw_free, | |
2c484df0 TI |
77 | .prepare = pxa2xx_pcm_prepare, |
78 | .trigger = pxa2xx_pcm_trigger, | |
79 | .pointer = pxa2xx_pcm_pointer, | |
80 | .mmap = pxa2xx_pcm_mmap, | |
81 | }; | |
82 | ||
2c484df0 TI |
83 | static u64 pxa2xx_pcm_dmamask = 0xffffffff; |
84 | ||
d18f8376 TI |
85 | int pxa2xx_pcm_new(struct snd_card *card, struct pxa2xx_pcm_client *client, |
86 | struct snd_pcm **rpcm) | |
2c484df0 | 87 | { |
d18f8376 | 88 | struct snd_pcm *pcm; |
2c484df0 TI |
89 | int play = client->playback_params ? 1 : 0; |
90 | int capt = client->capture_params ? 1 : 0; | |
91 | int ret; | |
92 | ||
93 | ret = snd_pcm_new(card, "PXA2xx-PCM", 0, play, capt, &pcm); | |
94 | if (ret) | |
95 | goto out; | |
96 | ||
97 | pcm->private_data = client; | |
98 | pcm->private_free = pxa2xx_pcm_free_dma_buffers; | |
99 | ||
100 | if (!card->dev->dma_mask) | |
101 | card->dev->dma_mask = &pxa2xx_pcm_dmamask; | |
102 | if (!card->dev->coherent_dma_mask) | |
103 | card->dev->coherent_dma_mask = 0xffffffff; | |
104 | ||
105 | if (play) { | |
106 | int stream = SNDRV_PCM_STREAM_PLAYBACK; | |
107 | snd_pcm_set_ops(pcm, stream, &pxa2xx_pcm_ops); | |
108 | ret = pxa2xx_pcm_preallocate_dma_buffer(pcm, stream); | |
109 | if (ret) | |
110 | goto out; | |
111 | } | |
112 | if (capt) { | |
113 | int stream = SNDRV_PCM_STREAM_CAPTURE; | |
114 | snd_pcm_set_ops(pcm, stream, &pxa2xx_pcm_ops); | |
115 | ret = pxa2xx_pcm_preallocate_dma_buffer(pcm, stream); | |
116 | if (ret) | |
117 | goto out; | |
118 | } | |
119 | ||
120 | if (rpcm) | |
121 | *rpcm = pcm; | |
122 | ret = 0; | |
123 | ||
124 | out: | |
125 | return ret; | |
126 | } | |
127 | ||
128 | EXPORT_SYMBOL(pxa2xx_pcm_new); | |
129 | ||
130 | MODULE_AUTHOR("Nicolas Pitre"); | |
131 | MODULE_DESCRIPTION("Intel PXA2xx PCM DMA module"); | |
132 | MODULE_LICENSE("GPL"); |