sound/soc/davinci/davinci-evm.c

   1 /*
   2  * ASoC driver for TI DAVINCI EVM platform
   3  *
   4  * Author:      Vladimir Barinov, <vbarinov@ru.mvista.com>
   5  * Copyright:   (C) 2007 MontaVista Software, Inc., <source@mvista.com>
   6  *
   7  * This program is free software; you can redistribute it and/or modify
   8  * it under the terms of the GNU General Public License version 2 as
   9  * published by the Free Software Foundation.
  10  */
  11
  12 #include <linux/module.h>
  13 #include <linux/moduleparam.h>
  14 #include <linux/timer.h>
  15 #include <linux/interrupt.h>
  16 #include <linux/platform_device.h>
  17 #include <sound/core.h>
  18 #include <sound/pcm.h>
  19 #include <sound/soc.h>
  20 #include <sound/soc-dapm.h>
  21
  22 #include <asm/dma.h>
  23 #include <mach/hardware.h>
  24
  25 #include "../codecs/tlv320aic3x.h"
  26 #include "davinci-pcm.h"
  27 #include "davinci-i2s.h"
  28
  29 #define EVM_CODEC_CLOCK 22579200
  30
  31 static int evm_hw_params(struct snd_pcm_substream *substream,
  32                          struct snd_pcm_hw_params *params)
  33 {
  34         struct snd_soc_pcm_runtime *rtd = substream->private_data;
  35         struct snd_soc_dai *codec_dai = rtd->dai->codec_dai;
  36         struct snd_soc_dai *cpu_dai = rtd->dai->cpu_dai;
  37         int ret = 0;
  38
  39         /* set codec DAI configuration */
  40         ret = snd_soc_dai_set_fmt(codec_dai, SND_SOC_DAIFMT_I2S |
  41                                          SND_SOC_DAIFMT_CBM_CFM);
  42         if (ret < 0)
  43                 return ret;
  44
  45         /* set cpu DAI configuration */
  46         ret = snd_soc_dai_set_fmt(cpu_dai, SND_SOC_DAIFMT_CBM_CFM |
  47                                        SND_SOC_DAIFMT_IB_NF);
  48         if (ret < 0)
  49                 return ret;
  50
  51         /* set the codec system clock */
  52         ret = snd_soc_dai_set_sysclk(codec_dai, 0, EVM_CODEC_CLOCK,
  53                                             SND_SOC_CLOCK_OUT);
  54         if (ret < 0)
  55                 return ret;
  56
  57         return 0;
  58 }
  59
  60 static struct snd_soc_ops evm_ops = {
  61         .hw_params = evm_hw_params,
  62 };
  63
  64 /* davinci-evm machine dapm widgets */
  65 static const struct snd_soc_dapm_widget aic3x_dapm_widgets[] = {
  66         SND_SOC_DAPM_HP("Headphone Jack", NULL),
  67         SND_SOC_DAPM_LINE("Line Out", NULL),
  68         SND_SOC_DAPM_MIC("Mic Jack", NULL),
  69         SND_SOC_DAPM_LINE("Line In", NULL),
  70 };
  71
  72 /* davinci-evm machine audio_mapnections to the codec pins */
  73 static const struct snd_soc_dapm_route audio_map[] = {
  74         /* Headphone connected to HPLOUT, HPROUT */
  75         {"Headphone Jack", NULL, "HPLOUT"},
  76         {"Headphone Jack", NULL, "HPROUT"},
  77
  78         /* Line Out connected to LLOUT, RLOUT */
  79         {"Line Out", NULL, "LLOUT"},
  80         {"Line Out", NULL, "RLOUT"},
  81
  82         /* Mic connected to (MIC3L | MIC3R) */
  83         {"MIC3L", NULL, "Mic Bias 2V"},
  84         {"MIC3R", NULL, "Mic Bias 2V"},
  85         {"Mic Bias 2V", NULL, "Mic Jack"},
  86
  87         /* Line In connected to (LINE1L | LINE2L), (LINE1R | LINE2R) */
  88         {"LINE1L", NULL, "Line In"},
  89         {"LINE2L", NULL, "Line In"},
  90         {"LINE1R", NULL, "Line In"},
  91         {"LINE2R", NULL, "Line In"},
  92 };
  93
  94 /* Logic for a aic3x as connected on a davinci-evm */
  95 static int evm_aic3x_init(struct snd_soc_codec *codec)
  96 {
  97         /* Add davinci-evm specific widgets */
  98         snd_soc_dapm_new_controls(codec, aic3x_dapm_widgets,
  99                                   ARRAY_SIZE(aic3x_dapm_widgets));
 100
 101         /* Set up davinci-evm specific audio path audio_map */
 102         snd_soc_dapm_add_routes(codec, audio_map, ARRAY_SIZE(audio_map));
 103
 104         /* not connected */
 105         snd_soc_dapm_disable_pin(codec, "MONO_LOUT");
 106         snd_soc_dapm_disable_pin(codec, "HPLCOM");
 107         snd_soc_dapm_disable_pin(codec, "HPRCOM");
 108
 109         /* always connected */
 110         snd_soc_dapm_enable_pin(codec, "Headphone Jack");
 111         snd_soc_dapm_enable_pin(codec, "Line Out");
 112         snd_soc_dapm_enable_pin(codec, "Mic Jack");
 113         snd_soc_dapm_enable_pin(codec, "Line In");
 114
 115         snd_soc_dapm_sync(codec);
 116
 117         return 0;
 118 }
 119
 120 /* davinci-evm digital audio interface glue - connects codec <--> CPU */
 121 static struct snd_soc_dai_link evm_dai = {
 122         .name = "TLV320AIC3X",
 123         .stream_name = "AIC3X",
 124         .cpu_dai = &davinci_i2s_dai,
 125         .codec_dai = &aic3x_dai,
 126         .init = evm_aic3x_init,
 127         .ops = &evm_ops,
 128 };
 129
 130 /* davinci-evm audio machine driver */
 131 static struct snd_soc_machine snd_soc_machine_evm = {
 132         .name = "DaVinci EVM",
 133         .dai_link = &evm_dai,
 134         .num_links = 1,
 135 };
 136
 137 /* evm audio private data */
 138 static struct aic3x_setup_data evm_aic3x_setup = {
 139         .i2c_bus = 0,
 140         .i2c_address = 0x1b,
 141 };
 142
 143 /* evm audio subsystem */
 144 static struct snd_soc_device evm_snd_devdata = {
 145         .machine = &snd_soc_machine_evm,
 146         .platform = &davinci_soc_platform,
 147         .codec_dev = &soc_codec_dev_aic3x,
 148         .codec_data = &evm_aic3x_setup,
 149 };
 150
 151 static struct resource evm_snd_resources[] = {
 152         {
 153                 .start = DAVINCI_MCBSP_BASE,
 154                 .end = DAVINCI_MCBSP_BASE + SZ_8K - 1,
 155                 .flags = IORESOURCE_MEM,
 156         },
 157 };
 158
 159 static struct evm_snd_platform_data evm_snd_data = {
 160         .tx_dma_ch      = DM644X_DMACH_MCBSP_TX,
 161         .rx_dma_ch      = DM644X_DMACH_MCBSP_RX,
 162 };
 163
 164 static struct platform_device *evm_snd_device;
 165
 166 static int __init evm_init(void)
 167 {
 168         int ret;
 169
 170         evm_snd_device = platform_device_alloc("soc-audio", 0);
 171         if (!evm_snd_device)
 172                 return -ENOMEM;
 173
 174         platform_set_drvdata(evm_snd_device, &evm_snd_devdata);
 175         evm_snd_devdata.dev = &evm_snd_device->dev;
 176         evm_snd_device->dev.platform_data = &evm_snd_data;
 177
 178         ret = platform_device_add_resources(evm_snd_device, evm_snd_resources,
 179                                             ARRAY_SIZE(evm_snd_resources));
 180         if (ret) {
 181                 platform_device_put(evm_snd_device);
 182                 return ret;
 183         }
 184
 185         ret = platform_device_add(evm_snd_device);
 186         if (ret)
 187                 platform_device_put(evm_snd_device);
 188
 189         return ret;
 190 }
 191
 192 static void __exit evm_exit(void)
 193 {
 194         platform_device_unregister(evm_snd_device);
 195 }
 196
 197 module_init(evm_init);
 198 module_exit(evm_exit);
 199
 200 MODULE_AUTHOR("Vladimir Barinov");
 201 MODULE_DESCRIPTION("TI DAVINCI EVM ASoC driver");
 202 MODULE_LICENSE("GPL");