sound/soc/davinci/davinci-evm.c

   1 /*
   2  * ASoC driver for TI DAVINCI EVM platform
   3  *
   4  * Author:      Vladimir Barinov, <vbarinov@embeddedalley.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
  30 #define AUDIO_FORMAT (SND_SOC_DAIFMT_DSP_B | \
  31                 SND_SOC_DAIFMT_CBM_CFM | SND_SOC_DAIFMT_IB_NF)
  32 static int evm_hw_params(struct snd_pcm_substream *substream,
  33                          struct snd_pcm_hw_params *params)
  34 {
  35         struct snd_soc_pcm_runtime *rtd = substream->private_data;
  36         struct snd_soc_dai *codec_dai = rtd->dai->codec_dai;
  37         struct snd_soc_dai *cpu_dai = rtd->dai->cpu_dai;
  38         int ret = 0;
  39         unsigned sysclk;
  40
  41         /* ASP1 on DM355 EVM is clocked by an external oscillator */
  42         if (machine_is_davinci_dm355_evm())
  43                 sysclk = 27000000;
  44
  45         /* ASP0 in DM6446 EVM is clocked by U55, as configured by
  46          * board-dm644x-evm.c using GPIOs from U18.  There are six
  47          * options; here we "know" we use a 48 KHz sample rate.
  48          */
  49         else if (machine_is_davinci_evm())
  50                 sysclk = 12288000;
  51
  52         else
  53                 return -EINVAL;
  54
  55         /* set codec DAI configuration */
  56         ret = snd_soc_dai_set_fmt(codec_dai, AUDIO_FORMAT);
  57         if (ret < 0)
  58                 return ret;
  59
  60         /* set cpu DAI configuration */
  61         ret = snd_soc_dai_set_fmt(cpu_dai, AUDIO_FORMAT);
  62         if (ret < 0)
  63                 return ret;
  64
  65         /* set the codec system clock */
  66         ret = snd_soc_dai_set_sysclk(codec_dai, 0, sysclk, SND_SOC_CLOCK_OUT);
  67         if (ret < 0)
  68                 return ret;
  69
  70         return 0;
  71 }
  72
  73 static struct snd_soc_ops evm_ops = {
  74         .hw_params = evm_hw_params,
  75 };
  76
  77 /* davinci-evm machine dapm widgets */
  78 static const struct snd_soc_dapm_widget aic3x_dapm_widgets[] = {
  79         SND_SOC_DAPM_HP("Headphone Jack", NULL),
  80         SND_SOC_DAPM_LINE("Line Out", NULL),
  81         SND_SOC_DAPM_MIC("Mic Jack", NULL),
  82         SND_SOC_DAPM_LINE("Line In", NULL),
  83 };
  84
  85 /* davinci-evm machine audio_mapnections to the codec pins */
  86 static const struct snd_soc_dapm_route audio_map[] = {
  87         /* Headphone connected to HPLOUT, HPROUT */
  88         {"Headphone Jack", NULL, "HPLOUT"},
  89         {"Headphone Jack", NULL, "HPROUT"},
  90
  91         /* Line Out connected to LLOUT, RLOUT */
  92         {"Line Out", NULL, "LLOUT"},
  93         {"Line Out", NULL, "RLOUT"},
  94
  95         /* Mic connected to (MIC3L | MIC3R) */
  96         {"MIC3L", NULL, "Mic Bias 2V"},
  97         {"MIC3R", NULL, "Mic Bias 2V"},
  98         {"Mic Bias 2V", NULL, "Mic Jack"},
  99
 100         /* Line In connected to (LINE1L | LINE2L), (LINE1R | LINE2R) */
 101         {"LINE1L", NULL, "Line In"},
 102         {"LINE2L", NULL, "Line In"},
 103         {"LINE1R", NULL, "Line In"},
 104         {"LINE2R", NULL, "Line In"},
 105 };
 106
 107 /* Logic for a aic3x as connected on a davinci-evm */
 108 static int evm_aic3x_init(struct snd_soc_codec *codec)
 109 {
 110         /* Add davinci-evm specific widgets */
 111         snd_soc_dapm_new_controls(codec, aic3x_dapm_widgets,
 112                                   ARRAY_SIZE(aic3x_dapm_widgets));
 113
 114         /* Set up davinci-evm specific audio path audio_map */
 115         snd_soc_dapm_add_routes(codec, audio_map, ARRAY_SIZE(audio_map));
 116
 117         /* not connected */
 118         snd_soc_dapm_disable_pin(codec, "MONO_LOUT");
 119         snd_soc_dapm_disable_pin(codec, "HPLCOM");
 120         snd_soc_dapm_disable_pin(codec, "HPRCOM");
 121
 122         /* always connected */
 123         snd_soc_dapm_enable_pin(codec, "Headphone Jack");
 124         snd_soc_dapm_enable_pin(codec, "Line Out");
 125         snd_soc_dapm_enable_pin(codec, "Mic Jack");
 126         snd_soc_dapm_enable_pin(codec, "Line In");
 127
 128         snd_soc_dapm_sync(codec);
 129
 130         return 0;
 131 }
 132
 133 /* davinci-evm digital audio interface glue - connects codec <--> CPU */
 134 static struct snd_soc_dai_link evm_dai = {
 135         .name = "TLV320AIC3X",
 136         .stream_name = "AIC3X",
 137         .cpu_dai = &davinci_i2s_dai,
 138         .codec_dai = &aic3x_dai,
 139         .init = evm_aic3x_init,
 140         .ops = &evm_ops,
 141 };
 142
 143 /* davinci-evm audio machine driver */
 144 static struct snd_soc_card snd_soc_card_evm = {
 145         .name = "DaVinci EVM",
 146         .platform = &davinci_soc_platform,
 147         .dai_link = &evm_dai,
 148         .num_links = 1,
 149 };
 150
 151 /* evm audio private data */
 152 static struct aic3x_setup_data evm_aic3x_setup = {
 153         .i2c_bus = 0,
 154         .i2c_address = 0x1b,
 155 };
 156
 157 /* evm audio subsystem */
 158 static struct snd_soc_device evm_snd_devdata = {
 159         .card = &snd_soc_card_evm,
 160         .codec_dev = &soc_codec_dev_aic3x,
 161         .codec_data = &evm_aic3x_setup,
 162 };
 163
 164 static struct resource evm_snd_resources[] = {
 165         {
 166                 .start = DAVINCI_MCBSP_BASE,
 167                 .end = DAVINCI_MCBSP_BASE + SZ_8K - 1,
 168                 .flags = IORESOURCE_MEM,
 169         },
 170 };
 171
 172 static struct evm_snd_platform_data evm_snd_data = {
 173         .tx_dma_ch      = DM644X_DMACH_MCBSP_TX,
 174         .rx_dma_ch      = DM644X_DMACH_MCBSP_RX,
 175 };
 176
 177 static struct platform_device *evm_snd_device;
 178
 179 static int __init evm_init(void)
 180 {
 181         int ret;
 182
 183         evm_snd_device = platform_device_alloc("soc-audio", 0);
 184         if (!evm_snd_device)
 185                 return -ENOMEM;
 186
 187         platform_set_drvdata(evm_snd_device, &evm_snd_devdata);
 188         evm_snd_devdata.dev = &evm_snd_device->dev;
 189         platform_device_add_data(evm_snd_device, &evm_snd_data,
 190                                  sizeof(evm_snd_data));
 191
 192         ret = platform_device_add_resources(evm_snd_device, evm_snd_resources,
 193                                             ARRAY_SIZE(evm_snd_resources));
 194         if (ret) {
 195                 platform_device_put(evm_snd_device);
 196                 return ret;
 197         }
 198
 199         ret = platform_device_add(evm_snd_device);
 200         if (ret)
 201                 platform_device_put(evm_snd_device);
 202
 203         return ret;
 204 }
 205
 206 static void __exit evm_exit(void)
 207 {
 208         platform_device_unregister(evm_snd_device);
 209 }
 210
 211 module_init(evm_init);
 212 module_exit(evm_exit);
 213
 214 MODULE_AUTHOR("Vladimir Barinov");
 215 MODULE_DESCRIPTION("TI DAVINCI EVM ASoC driver");
 216 MODULE_LICENSE("GPL");