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Diffstat (limited to 'sound/soc/blackfin/bf5xx-ad1938.c')
-rw-r--r--sound/soc/blackfin/bf5xx-ad1938.c142
1 files changed, 142 insertions, 0 deletions
diff --git a/sound/soc/blackfin/bf5xx-ad1938.c b/sound/soc/blackfin/bf5xx-ad1938.c
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1/*
2 * File: sound/soc/blackfin/bf5xx-ad1938.c
3 * Author: Barry Song <Barry.Song@analog.com>
4 *
5 * Created: Thur June 4 2009
6 * Description: Board driver for ad1938 sound chip
7 *
8 * Bugs: Enter bugs at http://blackfin.uclinux.org/
9 *
10 * This program is free software; you can redistribute it and/or modify
11 * it under the terms of the GNU General Public License as published by
12 * the Free Software Foundation; either version 2 of the License, or
13 * (at your option) any later version.
14 *
15 * This program is distributed in the hope that it will be useful,
16 * but WITHOUT ANY WARRANTY; without even the implied warranty of
17 * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
18 * GNU General Public License for more details.
19 *
20 * You should have received a copy of the GNU General Public License
21 * along with this program; if not, see the file COPYING, or write
22 * to the Free Software Foundation, Inc.,
23 * 51 Franklin St, Fifth Floor, Boston, MA 02110-1301 USA
24 */
25
26#include <linux/module.h>
27#include <linux/moduleparam.h>
28#include <linux/device.h>
29#include <sound/core.h>
30#include <sound/pcm.h>
31#include <sound/soc.h>
32#include <sound/soc-dapm.h>
33#include <sound/pcm_params.h>
34
35#include <asm/blackfin.h>
36#include <asm/cacheflush.h>
37#include <asm/irq.h>
38#include <asm/dma.h>
39#include <asm/portmux.h>
40
41#include "../codecs/ad1938.h"
42#include "bf5xx-sport.h"
43
44#include "bf5xx-tdm-pcm.h"
45#include "bf5xx-tdm.h"
46
47static struct snd_soc_card bf5xx_ad1938;
48
49static int bf5xx_ad1938_startup(struct snd_pcm_substream *substream)
50{
51 struct snd_soc_pcm_runtime *rtd = substream->private_data;
52 struct snd_soc_dai *cpu_dai = rtd->dai->cpu_dai;
53
54 cpu_dai->private_data = sport_handle;
55 return 0;
56}
57
58static int bf5xx_ad1938_hw_params(struct snd_pcm_substream *substream,
59 struct snd_pcm_hw_params *params)
60{
61 struct snd_soc_pcm_runtime *rtd = substream->private_data;
62 struct snd_soc_dai *cpu_dai = rtd->dai->cpu_dai;
63 struct snd_soc_dai *codec_dai = rtd->dai->codec_dai;
64 int ret = 0;
65 /* set cpu DAI configuration */
66 ret = snd_soc_dai_set_fmt(cpu_dai, SND_SOC_DAIFMT_DSP_A |
67 SND_SOC_DAIFMT_IB_IF | SND_SOC_DAIFMT_CBM_CFM);
68 if (ret < 0)
69 return ret;
70
71 /* set codec DAI configuration */
72 ret = snd_soc_dai_set_fmt(codec_dai, SND_SOC_DAIFMT_DSP_A |
73 SND_SOC_DAIFMT_IB_IF | SND_SOC_DAIFMT_CBM_CFM);
74 if (ret < 0)
75 return ret;
76
77 /* set codec DAI slots, 8 channels, all channels are enabled */
78 ret = snd_soc_dai_set_tdm_slot(codec_dai, 0xFF, 8);
79 if (ret < 0)
80 return ret;
81
82 return 0;
83}
84
85static struct snd_soc_ops bf5xx_ad1938_ops = {
86 .startup = bf5xx_ad1938_startup,
87 .hw_params = bf5xx_ad1938_hw_params,
88};
89
90static struct snd_soc_dai_link bf5xx_ad1938_dai = {
91 .name = "ad1938",
92 .stream_name = "AD1938",
93 .cpu_dai = &bf5xx_tdm_dai,
94 .codec_dai = &ad1938_dai,
95 .ops = &bf5xx_ad1938_ops,
96};
97
98static struct snd_soc_card bf5xx_ad1938 = {
99 .name = "bf5xx_ad1938",
100 .platform = &bf5xx_tdm_soc_platform,
101 .dai_link = &bf5xx_ad1938_dai,
102 .num_links = 1,
103};
104
105static struct snd_soc_device bf5xx_ad1938_snd_devdata = {
106 .card = &bf5xx_ad1938,
107 .codec_dev = &soc_codec_dev_ad1938,
108};
109
110static struct platform_device *bfxx_ad1938_snd_device;
111
112static int __init bf5xx_ad1938_init(void)
113{
114 int ret;
115
116 bfxx_ad1938_snd_device = platform_device_alloc("soc-audio", -1);
117 if (!bfxx_ad1938_snd_device)
118 return -ENOMEM;
119
120 platform_set_drvdata(bfxx_ad1938_snd_device, &bf5xx_ad1938_snd_devdata);
121 bf5xx_ad1938_snd_devdata.dev = &bfxx_ad1938_snd_device->dev;
122 ret = platform_device_add(bfxx_ad1938_snd_device);
123
124 if (ret)
125 platform_device_put(bfxx_ad1938_snd_device);
126
127 return ret;
128}
129
130static void __exit bf5xx_ad1938_exit(void)
131{
132 platform_device_unregister(bfxx_ad1938_snd_device);
133}
134
135module_init(bf5xx_ad1938_init);
136module_exit(bf5xx_ad1938_exit);
137
138/* Module information */
139MODULE_AUTHOR("Barry Song");
140MODULE_DESCRIPTION("ALSA SoC AD1938 board driver");
141MODULE_LICENSE("GPL");
142