ALSA: AACI: clean up AACI announcement printk
[linux-2.6.git] / sound / arm / pxa2xx-pcm.c
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");