1 /*
2 * File: sound/soc/blackfin/bf5xx-ad193x.c
3 * Author: Barry Song <Barry.Song@analog.com>
4 *
5 * Created: Thur June 4 2009
6 * Description: Board driver for ad193x 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/pcm_params.h>
33
34 #include <asm/blackfin.h>
35 #include <asm/cacheflush.h>
36 #include <asm/irq.h>
37 #include <asm/dma.h>
38 #include <asm/portmux.h>
39
40 #include "../codecs/ad193x.h"
41
42 #include "bf5xx-tdm-pcm.h"
43 #include "bf5xx-tdm.h"
44
45 static struct snd_soc_card bf5xx_ad193x;
46
bf5xx_ad193x_hw_params(struct snd_pcm_substream * substream,struct snd_pcm_hw_params * params)47 static int bf5xx_ad193x_hw_params(struct snd_pcm_substream *substream,
48 struct snd_pcm_hw_params *params)
49 {
50 struct snd_soc_pcm_runtime *rtd = substream->private_data;
51 struct snd_soc_dai *cpu_dai = rtd->cpu_dai;
52 struct snd_soc_dai *codec_dai = rtd->codec_dai;
53 unsigned int clk = 0;
54 unsigned int channel_map[] = {0, 1, 2, 3, 4, 5, 6, 7};
55 int ret = 0;
56
57 switch (params_rate(params)) {
58 case 48000:
59 clk = 24576000;
60 break;
61 }
62
63 /* set the codec system clock for DAC and ADC */
64 ret = snd_soc_dai_set_sysclk(codec_dai, 0, clk,
65 SND_SOC_CLOCK_IN);
66 if (ret < 0)
67 return ret;
68
69 /* set codec DAI slots, 8 channels, all channels are enabled */
70 ret = snd_soc_dai_set_tdm_slot(codec_dai, 0xFF, 0xFF, 8, 32);
71 if (ret < 0)
72 return ret;
73
74 /* set cpu DAI channel mapping */
75 ret = snd_soc_dai_set_channel_map(cpu_dai, ARRAY_SIZE(channel_map),
76 channel_map, ARRAY_SIZE(channel_map), channel_map);
77 if (ret < 0)
78 return ret;
79
80 return 0;
81 }
82
83 #define BF5XX_AD193X_DAIFMT (SND_SOC_DAIFMT_DSP_A | SND_SOC_DAIFMT_IB_IF | \
84 SND_SOC_DAIFMT_CBM_CFM)
85
86 static struct snd_soc_ops bf5xx_ad193x_ops = {
87 .hw_params = bf5xx_ad193x_hw_params,
88 };
89
90 static struct snd_soc_dai_link bf5xx_ad193x_dai[] = {
91 {
92 .name = "ad193x",
93 .stream_name = "AD193X",
94 .cpu_dai_name = "bfin-tdm.0",
95 .codec_dai_name ="ad193x-hifi",
96 .platform_name = "bfin-tdm-pcm-audio",
97 .codec_name = "spi0.5",
98 .ops = &bf5xx_ad193x_ops,
99 .dai_fmt = BF5XX_AD193X_DAIFMT,
100 },
101 {
102 .name = "ad193x",
103 .stream_name = "AD193X",
104 .cpu_dai_name = "bfin-tdm.1",
105 .codec_dai_name ="ad193x-hifi",
106 .platform_name = "bfin-tdm-pcm-audio",
107 .codec_name = "spi0.5",
108 .ops = &bf5xx_ad193x_ops,
109 .dai_fmt = BF5XX_AD193X_DAIFMT,
110 },
111 };
112
113 static struct snd_soc_card bf5xx_ad193x = {
114 .name = "bfin-ad193x",
115 .owner = THIS_MODULE,
116 .dai_link = &bf5xx_ad193x_dai[CONFIG_SND_BF5XX_SPORT_NUM],
117 .num_links = 1,
118 };
119
120 static struct platform_device *bfxx_ad193x_snd_device;
121
bf5xx_ad193x_init(void)122 static int __init bf5xx_ad193x_init(void)
123 {
124 int ret;
125
126 bfxx_ad193x_snd_device = platform_device_alloc("soc-audio", -1);
127 if (!bfxx_ad193x_snd_device)
128 return -ENOMEM;
129
130 platform_set_drvdata(bfxx_ad193x_snd_device, &bf5xx_ad193x);
131 ret = platform_device_add(bfxx_ad193x_snd_device);
132
133 if (ret)
134 platform_device_put(bfxx_ad193x_snd_device);
135
136 return ret;
137 }
138
bf5xx_ad193x_exit(void)139 static void __exit bf5xx_ad193x_exit(void)
140 {
141 platform_device_unregister(bfxx_ad193x_snd_device);
142 }
143
144 module_init(bf5xx_ad193x_init);
145 module_exit(bf5xx_ad193x_exit);
146
147 /* Module information */
148 MODULE_AUTHOR("Barry Song");
149 MODULE_DESCRIPTION("ALSA SoC AD193X board driver");
150 MODULE_LICENSE("GPL");
151
152