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> |
c9bd5e69 | 14 | #include <linux/dma-mapping.h> |
d65a1458 DM |
15 | #include <linux/dmaengine.h> |
16 | ||
2c484df0 | 17 | #include <sound/core.h> |
a6d77317 | 18 | #include <sound/pxa2xx-lib.h> |
d65a1458 | 19 | #include <sound/dmaengine_pcm.h> |
2c484df0 TI |
20 | |
21 | #include "pxa2xx-pcm.h" | |
22 | ||
d18f8376 | 23 | static int pxa2xx_pcm_prepare(struct snd_pcm_substream *substream) |
2c484df0 | 24 | { |
d18f8376 | 25 | struct pxa2xx_pcm_client *client = substream->private_data; |
2c484df0 | 26 | |
a6d77317 | 27 | __pxa2xx_pcm_prepare(substream); |
2c484df0 TI |
28 | |
29 | return client->prepare(substream); | |
30 | } | |
31 | ||
d18f8376 | 32 | static int pxa2xx_pcm_open(struct snd_pcm_substream *substream) |
2c484df0 | 33 | { |
d18f8376 TI |
34 | struct pxa2xx_pcm_client *client = substream->private_data; |
35 | struct snd_pcm_runtime *runtime = substream->runtime; | |
2c484df0 TI |
36 | struct pxa2xx_runtime_data *rtd; |
37 | int ret; | |
38 | ||
a6d77317 | 39 | ret = __pxa2xx_pcm_open(substream); |
2c484df0 TI |
40 | if (ret) |
41 | goto out; | |
42 | ||
a6d77317 | 43 | rtd = runtime->private_data; |
2c484df0 TI |
44 | |
45 | rtd->params = (substream->stream == SNDRV_PCM_STREAM_PLAYBACK) ? | |
46 | client->playback_params : client->capture_params; | |
d65a1458 | 47 | ret = pxa_request_dma("dma", DMA_PRIO_LOW, |
2c484df0 TI |
48 | pxa2xx_pcm_dma_irq, substream); |
49 | if (ret < 0) | |
50 | goto err2; | |
51 | rtd->dma_ch = ret; | |
52 | ||
2c484df0 TI |
53 | ret = client->startup(substream); |
54 | if (!ret) | |
55 | goto out; | |
56 | ||
57 | pxa_free_dma(rtd->dma_ch); | |
58 | err2: | |
a6d77317 | 59 | __pxa2xx_pcm_close(substream); |
2c484df0 TI |
60 | out: |
61 | return ret; | |
62 | } | |
63 | ||
d18f8376 | 64 | static int pxa2xx_pcm_close(struct snd_pcm_substream *substream) |
2c484df0 | 65 | { |
d18f8376 | 66 | struct pxa2xx_pcm_client *client = substream->private_data; |
2c484df0 TI |
67 | struct pxa2xx_runtime_data *rtd = substream->runtime->private_data; |
68 | ||
69 | pxa_free_dma(rtd->dma_ch); | |
70 | client->shutdown(substream); | |
2c484df0 | 71 | |
a6d77317 | 72 | return __pxa2xx_pcm_close(substream); |
2c484df0 TI |
73 | } |
74 | ||
d18f8376 | 75 | static struct snd_pcm_ops pxa2xx_pcm_ops = { |
2c484df0 TI |
76 | .open = pxa2xx_pcm_open, |
77 | .close = pxa2xx_pcm_close, | |
78 | .ioctl = snd_pcm_lib_ioctl, | |
a6d77317 DB |
79 | .hw_params = __pxa2xx_pcm_hw_params, |
80 | .hw_free = __pxa2xx_pcm_hw_free, | |
2c484df0 TI |
81 | .prepare = pxa2xx_pcm_prepare, |
82 | .trigger = pxa2xx_pcm_trigger, | |
83 | .pointer = pxa2xx_pcm_pointer, | |
84 | .mmap = pxa2xx_pcm_mmap, | |
85 | }; | |
86 | ||
d18f8376 TI |
87 | int pxa2xx_pcm_new(struct snd_card *card, struct pxa2xx_pcm_client *client, |
88 | struct snd_pcm **rpcm) | |
2c484df0 | 89 | { |
d18f8376 | 90 | struct snd_pcm *pcm; |
2c484df0 TI |
91 | int play = client->playback_params ? 1 : 0; |
92 | int capt = client->capture_params ? 1 : 0; | |
93 | int ret; | |
94 | ||
95 | ret = snd_pcm_new(card, "PXA2xx-PCM", 0, play, capt, &pcm); | |
96 | if (ret) | |
97 | goto out; | |
98 | ||
99 | pcm->private_data = client; | |
100 | pcm->private_free = pxa2xx_pcm_free_dma_buffers; | |
101 | ||
c9bd5e69 RK |
102 | ret = dma_coerce_mask_and_coherent(card->dev, DMA_BIT_MASK(32)); |
103 | if (ret) | |
104 | goto out; | |
2c484df0 TI |
105 | |
106 | if (play) { | |
107 | int stream = SNDRV_PCM_STREAM_PLAYBACK; | |
108 | snd_pcm_set_ops(pcm, stream, &pxa2xx_pcm_ops); | |
109 | ret = pxa2xx_pcm_preallocate_dma_buffer(pcm, stream); | |
110 | if (ret) | |
111 | goto out; | |
112 | } | |
113 | if (capt) { | |
114 | int stream = SNDRV_PCM_STREAM_CAPTURE; | |
115 | snd_pcm_set_ops(pcm, stream, &pxa2xx_pcm_ops); | |
116 | ret = pxa2xx_pcm_preallocate_dma_buffer(pcm, stream); | |
117 | if (ret) | |
118 | goto out; | |
119 | } | |
120 | ||
121 | if (rpcm) | |
122 | *rpcm = pcm; | |
123 | ret = 0; | |
124 | ||
125 | out: | |
126 | return ret; | |
127 | } | |
128 | ||
129 | EXPORT_SYMBOL(pxa2xx_pcm_new); | |
130 | ||
131 | MODULE_AUTHOR("Nicolas Pitre"); | |
132 | MODULE_DESCRIPTION("Intel PXA2xx PCM DMA module"); | |
133 | MODULE_LICENSE("GPL"); |