ALSA: hda - Enabling Realtek ALC 671 codec
[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 <linux/module.h>
14 #include <sound/core.h>
15 #include <sound/pxa2xx-lib.h>
16
17 #include "pxa2xx-pcm.h"
18
19 static int pxa2xx_pcm_prepare(struct snd_pcm_substream *substream)
20 {
21         struct pxa2xx_pcm_client *client = substream->private_data;
22
23         __pxa2xx_pcm_prepare(substream);
24
25         return client->prepare(substream);
26 }
27
28 static int pxa2xx_pcm_open(struct snd_pcm_substream *substream)
29 {
30         struct pxa2xx_pcm_client *client = substream->private_data;
31         struct snd_pcm_runtime *runtime = substream->runtime;
32         struct pxa2xx_runtime_data *rtd;
33         int ret;
34
35         ret = __pxa2xx_pcm_open(substream);
36         if (ret)
37                 goto out;
38
39         rtd = runtime->private_data;
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
49         ret = client->startup(substream);
50         if (!ret)
51                 goto out;
52
53         pxa_free_dma(rtd->dma_ch);
54  err2:
55         __pxa2xx_pcm_close(substream);
56  out:
57         return ret;
58 }
59
60 static int pxa2xx_pcm_close(struct snd_pcm_substream *substream)
61 {
62         struct pxa2xx_pcm_client *client = substream->private_data;
63         struct pxa2xx_runtime_data *rtd = substream->runtime->private_data;
64
65         pxa_free_dma(rtd->dma_ch);
66         client->shutdown(substream);
67
68         return __pxa2xx_pcm_close(substream);
69 }
70
71 static struct snd_pcm_ops pxa2xx_pcm_ops = {
72         .open           = pxa2xx_pcm_open,
73         .close          = pxa2xx_pcm_close,
74         .ioctl          = snd_pcm_lib_ioctl,
75         .hw_params      = __pxa2xx_pcm_hw_params,
76         .hw_free        = __pxa2xx_pcm_hw_free,
77         .prepare        = pxa2xx_pcm_prepare,
78         .trigger        = pxa2xx_pcm_trigger,
79         .pointer        = pxa2xx_pcm_pointer,
80         .mmap           = pxa2xx_pcm_mmap,
81 };
82
83 static u64 pxa2xx_pcm_dmamask = 0xffffffff;
84
85 int pxa2xx_pcm_new(struct snd_card *card, struct pxa2xx_pcm_client *client,
86                    struct snd_pcm **rpcm)
87 {
88         struct snd_pcm *pcm;
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");