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Linux/sound/soc/omap/am3517evm.c

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  1 /*
  2  * am3517evm.c  -- ALSA SoC support for OMAP3517 / AM3517 EVM
  3  *
  4  * Author: Anuj Aggarwal <anuj.aggarwal@ti.com>
  5  *
  6  * Based on sound/soc/omap/beagle.c by Steve Sakoman
  7  *
  8  * Copyright (C) 2009 Texas Instruments Incorporated
  9  *
 10  * This program is free software; you can redistribute it and/or modify it
 11  * under the terms of the GNU General Public License as published by the
 12  * Free Software Foundation version 2.
 13  *
 14  * This program is distributed "as is" WITHOUT ANY WARRANTY of any kind,
 15  * whether express or implied; without even the implied warranty of
 16  * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
 17  * General Public License for more details.
 18  */
 19 
 20 #include <linux/clk.h>
 21 #include <linux/platform_device.h>
 22 #include <linux/module.h>
 23 #include <sound/core.h>
 24 #include <sound/pcm.h>
 25 #include <sound/soc.h>
 26 
 27 #include <asm/mach-types.h>
 28 #include <linux/platform_data/asoc-ti-mcbsp.h>
 29 
 30 #include "omap-mcbsp.h"
 31 
 32 #include "../codecs/tlv320aic23.h"
 33 
 34 #define CODEC_CLOCK     12000000
 35 
 36 static int am3517evm_hw_params(struct snd_pcm_substream *substream,
 37         struct snd_pcm_hw_params *params)
 38 {
 39         struct snd_soc_pcm_runtime *rtd = substream->private_data;
 40         struct snd_soc_dai *codec_dai = rtd->codec_dai;
 41         int ret;
 42 
 43         /* Set the codec system clock for DAC and ADC */
 44         ret = snd_soc_dai_set_sysclk(codec_dai, 0,
 45                         CODEC_CLOCK, SND_SOC_CLOCK_IN);
 46         if (ret < 0)
 47                 printk(KERN_ERR "can't set codec system clock\n");
 48 
 49         return ret;
 50 }
 51 
 52 static struct snd_soc_ops am3517evm_ops = {
 53         .hw_params = am3517evm_hw_params,
 54 };
 55 
 56 /* am3517evm machine dapm widgets */
 57 static const struct snd_soc_dapm_widget tlv320aic23_dapm_widgets[] = {
 58         SND_SOC_DAPM_HP("Line Out", NULL),
 59         SND_SOC_DAPM_LINE("Line In", NULL),
 60         SND_SOC_DAPM_MIC("Mic In", NULL),
 61 };
 62 
 63 static const struct snd_soc_dapm_route audio_map[] = {
 64         /* Line Out connected to LLOUT, RLOUT */
 65         {"Line Out", NULL, "LOUT"},
 66         {"Line Out", NULL, "ROUT"},
 67 
 68         {"LLINEIN", NULL, "Line In"},
 69         {"RLINEIN", NULL, "Line In"},
 70 
 71         {"MICIN", NULL, "Mic In"},
 72 };
 73 
 74 /* Digital audio interface glue - connects codec <--> CPU */
 75 static struct snd_soc_dai_link am3517evm_dai = {
 76         .name = "TLV320AIC23",
 77         .stream_name = "AIC23",
 78         .cpu_dai_name = "omap-mcbsp.1",
 79         .codec_dai_name = "tlv320aic23-hifi",
 80         .platform_name = "omap-mcbsp.1",
 81         .codec_name = "tlv320aic23-codec.2-001a",
 82         .dai_fmt = SND_SOC_DAIFMT_DSP_B | SND_SOC_DAIFMT_NB_NF |
 83                    SND_SOC_DAIFMT_CBM_CFM,
 84         .ops = &am3517evm_ops,
 85 };
 86 
 87 /* Audio machine driver */
 88 static struct snd_soc_card snd_soc_am3517evm = {
 89         .name = "am3517evm",
 90         .owner = THIS_MODULE,
 91         .dai_link = &am3517evm_dai,
 92         .num_links = 1,
 93 
 94         .dapm_widgets = tlv320aic23_dapm_widgets,
 95         .num_dapm_widgets = ARRAY_SIZE(tlv320aic23_dapm_widgets),
 96         .dapm_routes = audio_map,
 97         .num_dapm_routes = ARRAY_SIZE(audio_map),
 98 };
 99 
100 static struct platform_device *am3517evm_snd_device;
101 
102 static int __init am3517evm_soc_init(void)
103 {
104         int ret;
105 
106         if (!machine_is_omap3517evm())
107                 return -ENODEV;
108         pr_info("OMAP3517 / AM3517 EVM SoC init\n");
109 
110         am3517evm_snd_device = platform_device_alloc("soc-audio", -1);
111         if (!am3517evm_snd_device) {
112                 printk(KERN_ERR "Platform device allocation failed\n");
113                 return -ENOMEM;
114         }
115 
116         platform_set_drvdata(am3517evm_snd_device, &snd_soc_am3517evm);
117 
118         ret = platform_device_add(am3517evm_snd_device);
119         if (ret)
120                 goto err1;
121 
122         return 0;
123 
124 err1:
125         printk(KERN_ERR "Unable to add platform device\n");
126         platform_device_put(am3517evm_snd_device);
127 
128         return ret;
129 }
130 
131 static void __exit am3517evm_soc_exit(void)
132 {
133         platform_device_unregister(am3517evm_snd_device);
134 }
135 
136 module_init(am3517evm_soc_init);
137 module_exit(am3517evm_soc_exit);
138 
139 MODULE_AUTHOR("Anuj Aggarwal <anuj.aggarwal@ti.com>");
140 MODULE_DESCRIPTION("ALSA SoC OMAP3517 / AM3517 EVM");
141 MODULE_LICENSE("GPL v2");
142 

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