1 /*
2 * File: sound/soc/blackfin/bf5xx-ssm2602.c
3 * Author: Cliff Cai <Cliff.Cai@analog.com>
4 *
5 * Created: Tue June 06 2008
6 * Description: board driver for SSM2602 sound chip
7 *
8 * Modified:
9 * Copyright 2008 Analog Devices Inc.
10 *
11 * Bugs: Enter bugs at http://blackfin.uclinux.org/
12 *
13 * This program is free software; you can redistribute it and/or modify
14 * it under the terms of the GNU General Public License as published by
15 * the Free Software Foundation; either version 2 of the License, or
16 * (at your option) any later version.
17 *
18 * This program is distributed in the hope that it will be useful,
19 * but WITHOUT ANY WARRANTY; without even the implied warranty of
20 * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
21 * GNU General Public License for more details.
22 *
23 * You should have received a copy of the GNU General Public License
24 * along with this program; if not, see the file COPYING, or write
25 * to the Free Software Foundation, Inc.,
26 * 51 Franklin St, Fifth Floor, Boston, MA 02110-1301 USA
27 */
28
29 #include <linux/module.h>
30 #include <linux/moduleparam.h>
31 #include <linux/device.h>
32
33 #include <sound/core.h>
34 #include <sound/pcm.h>
35 #include <sound/soc.h>
36 #include <sound/pcm_params.h>
37
38 #include <asm/dma.h>
39 #include <asm/portmux.h>
40 #include <linux/gpio.h>
41 #include "../codecs/ssm2602.h"
42 #include "bf5xx-sport.h"
43 #include "bf5xx-i2s-pcm.h"
44
45 static struct snd_soc_card bf5xx_ssm2602;
46
bf5xx_ssm2602_hw_params(struct snd_pcm_substream * substream,struct snd_pcm_hw_params * params)47 static int bf5xx_ssm2602_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 *codec_dai = rtd->codec_dai;
52 struct snd_soc_dai *cpu_dai = rtd->cpu_dai;
53 unsigned int clk = 0;
54 int ret = 0;
55
56 pr_debug("%s rate %d format %x\n", __func__, params_rate(params),
57 params_format(params));
58 /*
59 * If you are using a crystal source which frequency is not 12MHz
60 * then modify the below case statement with frequency of the crystal.
61 *
62 * If you are using the SPORT to generate clocking then this is
63 * where to do it.
64 */
65
66 switch (params_rate(params)) {
67 case 8000:
68 case 16000:
69 case 48000:
70 case 96000:
71 case 11025:
72 case 22050:
73 case 44100:
74 clk = 12000000;
75 break;
76 }
77
78 /*
79 * CODEC is master for BCLK and LRC in this configuration.
80 */
81
82 /* set codec DAI configuration */
83 ret = snd_soc_dai_set_fmt(codec_dai, SND_SOC_DAIFMT_I2S |
84 SND_SOC_DAIFMT_NB_NF | SND_SOC_DAIFMT_CBM_CFM);
85 if (ret < 0)
86 return ret;
87 /* set cpu DAI configuration */
88 ret = snd_soc_dai_set_fmt(cpu_dai, SND_SOC_DAIFMT_I2S |
89 SND_SOC_DAIFMT_NB_NF | SND_SOC_DAIFMT_CBM_CFM);
90 if (ret < 0)
91 return ret;
92
93 ret = snd_soc_dai_set_sysclk(codec_dai, SSM2602_SYSCLK, clk,
94 SND_SOC_CLOCK_IN);
95 if (ret < 0)
96 return ret;
97
98 return 0;
99 }
100
101 static struct snd_soc_ops bf5xx_ssm2602_ops = {
102 .hw_params = bf5xx_ssm2602_hw_params,
103 };
104
105 static struct snd_soc_dai_link bf5xx_ssm2602_dai[] = {
106 {
107 .name = "ssm2602",
108 .stream_name = "SSM2602",
109 .cpu_dai_name = "bfin-i2s.0",
110 .codec_dai_name = "ssm2602-hifi",
111 .platform_name = "bfin-i2s-pcm-audio",
112 .codec_name = "ssm2602.0-001b",
113 .ops = &bf5xx_ssm2602_ops,
114 },
115 {
116 .name = "ssm2602",
117 .stream_name = "SSM2602",
118 .cpu_dai_name = "bfin-i2s.1",
119 .codec_dai_name = "ssm2602-hifi",
120 .platform_name = "bfin-i2s-pcm-audio",
121 .codec_name = "ssm2602.0-001b",
122 .ops = &bf5xx_ssm2602_ops,
123 },
124 };
125
126 static struct snd_soc_card bf5xx_ssm2602 = {
127 .name = "bfin-ssm2602",
128 .owner = THIS_MODULE,
129 .dai_link = &bf5xx_ssm2602_dai[CONFIG_SND_BF5XX_SPORT_NUM],
130 .num_links = 1,
131 };
132
133 static struct platform_device *bf5xx_ssm2602_snd_device;
134
bf5xx_ssm2602_init(void)135 static int __init bf5xx_ssm2602_init(void)
136 {
137 int ret;
138
139 pr_debug("%s enter\n", __func__);
140 bf5xx_ssm2602_snd_device = platform_device_alloc("soc-audio", -1);
141 if (!bf5xx_ssm2602_snd_device)
142 return -ENOMEM;
143
144 platform_set_drvdata(bf5xx_ssm2602_snd_device, &bf5xx_ssm2602);
145 ret = platform_device_add(bf5xx_ssm2602_snd_device);
146
147 if (ret)
148 platform_device_put(bf5xx_ssm2602_snd_device);
149
150 return ret;
151 }
152
bf5xx_ssm2602_exit(void)153 static void __exit bf5xx_ssm2602_exit(void)
154 {
155 pr_debug("%s enter\n", __func__);
156 platform_device_unregister(bf5xx_ssm2602_snd_device);
157 }
158
159 module_init(bf5xx_ssm2602_init);
160 module_exit(bf5xx_ssm2602_exit);
161
162 /* Module information */
163 MODULE_AUTHOR("Cliff Cai");
164 MODULE_DESCRIPTION("ALSA SoC SSM2602 BF527-EZKIT");
165 MODULE_LICENSE("GPL");
166
167