sound/soc/omap/am3517evm.c

   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 <mach/hardware.h>
  29 #include <mach/gpio.h>
  30 #include <plat/mcbsp.h>
  31
  32 #include "omap-mcbsp.h"
  33 #include "omap-pcm.h"
  34
  35 #include "../codecs/tlv320aic23.h"
  36
  37 #define CODEC_CLOCK     12000000
  38
  39 static int am3517evm_hw_params(struct snd_pcm_substream *substream,
  40         struct snd_pcm_hw_params *params)
  41 {
  42         struct snd_soc_pcm_runtime *rtd = substream->private_data;
  43         struct snd_soc_dai *codec_dai = rtd->codec_dai;
  44         struct snd_soc_dai *cpu_dai = rtd->cpu_dai;
  45         int ret;
  46
  47         /* Set the codec system clock for DAC and ADC */
  48         ret = snd_soc_dai_set_sysclk(codec_dai, 0,
  49                         CODEC_CLOCK, SND_SOC_CLOCK_IN);
  50         if (ret < 0) {
  51                 printk(KERN_ERR "can't set codec system clock\n");
  52                 return ret;
  53         }
  54
  55         ret = snd_soc_dai_set_sysclk(cpu_dai, OMAP_MCBSP_CLKR_SRC_CLKX, 0,
  56                                 SND_SOC_CLOCK_IN);
  57         if (ret < 0) {
  58                 printk(KERN_ERR "can't set CPU system clock OMAP_MCBSP_CLKR_SRC_CLKX\n");
  59                 return ret;
  60         }
  61
  62         snd_soc_dai_set_sysclk(cpu_dai, OMAP_MCBSP_FSR_SRC_FSX, 0,
  63                                 SND_SOC_CLOCK_IN);
  64         if (ret < 0) {
  65                 printk(KERN_ERR "can't set CPU system clock OMAP_MCBSP_FSR_SRC_FSX\n");
  66                 return ret;
  67         }
  68
  69         return 0;
  70 }
  71
  72 static struct snd_soc_ops am3517evm_ops = {
  73         .hw_params = am3517evm_hw_params,
  74 };
  75
  76 /* am3517evm machine dapm widgets */
  77 static const struct snd_soc_dapm_widget tlv320aic23_dapm_widgets[] = {
  78         SND_SOC_DAPM_HP("Line Out", NULL),
  79         SND_SOC_DAPM_LINE("Line In", NULL),
  80         SND_SOC_DAPM_MIC("Mic In", NULL),
  81 };
  82
  83 static const struct snd_soc_dapm_route audio_map[] = {
  84         /* Line Out connected to LLOUT, RLOUT */
  85         {"Line Out", NULL, "LOUT"},
  86         {"Line Out", NULL, "ROUT"},
  87
  88         {"LLINEIN", NULL, "Line In"},
  89         {"RLINEIN", NULL, "Line In"},
  90
  91         {"MICIN", NULL, "Mic In"},
  92 };
  93
  94 /* Digital audio interface glue - connects codec <--> CPU */
  95 static struct snd_soc_dai_link am3517evm_dai = {
  96         .name = "TLV320AIC23",
  97         .stream_name = "AIC23",
  98         .cpu_dai_name ="omap-mcbsp-dai.0",
  99         .codec_dai_name = "tlv320aic23-hifi",
 100         .platform_name = "omap-pcm-audio",
 101         .codec_name = "tlv320aic23-codec.2-001a",
 102         .dai_fmt = SND_SOC_DAIFMT_DSP_B | SND_SOC_DAIFMT_NB_NF |
 103                    SND_SOC_DAIFMT_CBM_CFM,
 104         .ops = &am3517evm_ops,
 105 };
 106
 107 /* Audio machine driver */
 108 static struct snd_soc_card snd_soc_am3517evm = {
 109         .name = "am3517evm",
 110         .owner = THIS_MODULE,
 111         .dai_link = &am3517evm_dai,
 112         .num_links = 1,
 113
 114         .dapm_widgets = tlv320aic23_dapm_widgets,
 115         .num_dapm_widgets = ARRAY_SIZE(tlv320aic23_dapm_widgets),
 116         .dapm_routes = audio_map,
 117         .num_dapm_routes = ARRAY_SIZE(audio_map),
 118 };
 119
 120 static struct platform_device *am3517evm_snd_device;
 121
 122 static int __init am3517evm_soc_init(void)
 123 {
 124         int ret;
 125
 126         if (!machine_is_omap3517evm())
 127                 return -ENODEV;
 128         pr_info("OMAP3517 / AM3517 EVM SoC init\n");
 129
 130         am3517evm_snd_device = platform_device_alloc("soc-audio", -1);
 131         if (!am3517evm_snd_device) {
 132                 printk(KERN_ERR "Platform device allocation failed\n");
 133                 return -ENOMEM;
 134         }
 135
 136         platform_set_drvdata(am3517evm_snd_device, &snd_soc_am3517evm);
 137
 138         ret = platform_device_add(am3517evm_snd_device);
 139         if (ret)
 140                 goto err1;
 141
 142         return 0;
 143
 144 err1:
 145         printk(KERN_ERR "Unable to add platform device\n");
 146         platform_device_put(am3517evm_snd_device);
 147
 148         return ret;
 149 }
 150
 151 static void __exit am3517evm_soc_exit(void)
 152 {
 153         platform_device_unregister(am3517evm_snd_device);
 154 }
 155
 156 module_init(am3517evm_soc_init);
 157 module_exit(am3517evm_soc_exit);
 158
 159 MODULE_AUTHOR("Anuj Aggarwal <anuj.aggarwal@ti.com>");
 160 MODULE_DESCRIPTION("ALSA SoC OMAP3517 / AM3517 EVM");
 161 MODULE_LICENSE("GPL v2");