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/mach-types.h>
  23 #include <asm/dma.h>
  24 #include <asm/arch/hardware.h>
  25
  26 #include "../codecs/tlv320aic3x.h"
  27 #include "davinci-pcm.h"
  28 #include "davinci-i2s.h"
  29
  30 #define EVM_CODEC_CLOCK 22579200
  31
  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_codec_dai *codec_dai = rtd->dai->codec_dai;
  37         struct snd_soc_cpu_dai *cpu_dai = rtd->dai->cpu_dai;
  38         int ret = 0;
  39
  40         /* set codec DAI configuration */
  41         ret = codec_dai->dai_ops.set_fmt(codec_dai, SND_SOC_DAIFMT_I2S |
  42                                          SND_SOC_DAIFMT_CBM_CFM);
  43         if (ret < 0)
  44                 return ret;
  45
  46         /* set cpu DAI configuration */
  47         ret = cpu_dai->dai_ops.set_fmt(cpu_dai, SND_SOC_DAIFMT_CBM_CFM |
  48                                        SND_SOC_DAIFMT_IB_NF);
  49         if (ret < 0)
  50                 return ret;
  51
  52         /* set the codec system clock */
  53         ret = codec_dai->dai_ops.set_sysclk(codec_dai, 0, EVM_CODEC_CLOCK,
  54                                             SND_SOC_CLOCK_OUT);
  55         if (ret < 0)
  56                 return ret;
  57
  58         return 0;
  59 }
  60
  61 static struct snd_soc_ops evm_ops = {
  62         .hw_params = evm_hw_params,
  63 };
  64
  65 /* davinci-evm machine dapm widgets */
  66 static const struct snd_soc_dapm_widget aic3x_dapm_widgets[] = {
  67         SND_SOC_DAPM_HP("Headphone Jack", NULL),
  68         SND_SOC_DAPM_LINE("Line Out", NULL),
  69         SND_SOC_DAPM_MIC("Mic Jack", NULL),
  70         SND_SOC_DAPM_LINE("Line In", NULL),
  71 };
  72
  73 /* davinci-evm machine audio_mapnections to the codec pins */
  74 static const char *audio_map[][3] = {
  75         /* Headphone connected to HPLOUT, HPROUT */
  76         {"Headphone Jack", NULL, "HPLOUT"},
  77         {"Headphone Jack", NULL, "HPROUT"},
  78
  79         /* Line Out connected to LLOUT, RLOUT */
  80         {"Line Out", NULL, "LLOUT"},
  81         {"Line Out", NULL, "RLOUT"},
  82
  83         /* Mic connected to (MIC3L | MIC3R) */
  84         {"MIC3L", NULL, "Mic Bias 2V"},
  85         {"MIC3R", NULL, "Mic Bias 2V"},
  86         {"Mic Bias 2V", NULL, "Mic Jack"},
  87
  88         /* Line In connected to (LINE1L | LINE2L), (LINE1R | LINE2R) */
  89         {"LINE1L", NULL, "Line In"},
  90         {"LINE2L", NULL, "Line In"},
  91         {"LINE1R", NULL, "Line In"},
  92         {"LINE2R", NULL, "Line In"},
  93
  94         {NULL, NULL, NULL},
  95 };
  96
  97 /* Logic for a aic3x as connected on a davinci-evm */
  98 static int evm_aic3x_init(struct snd_soc_codec *codec)
  99 {
 100         int i;
 101
 102         /* Add davinci-evm specific widgets */
 103         for (i = 0; i < ARRAY_SIZE(aic3x_dapm_widgets); i++)
 104                 snd_soc_dapm_new_control(codec, &aic3x_dapm_widgets[i]);
 105
 106         /* Set up davinci-evm specific audio path audio_map */
 107         for (i = 0; audio_map[i][0] != NULL; i++)
 108                 snd_soc_dapm_connect_input(codec, audio_map[i][0],
 109                                            audio_map[i][1], audio_map[i][2]);
 110
 111         /* not connected */
 112         snd_soc_dapm_set_endpoint(codec, "MONO_LOUT", 0);
 113         snd_soc_dapm_set_endpoint(codec, "HPLCOM", 0);
 114         snd_soc_dapm_set_endpoint(codec, "HPRCOM", 0);
 115
 116         /* always connected */
 117         snd_soc_dapm_set_endpoint(codec, "Headphone Jack", 1);
 118         snd_soc_dapm_set_endpoint(codec, "Line Out", 1);
 119         snd_soc_dapm_set_endpoint(codec, "Mic Jack", 1);
 120         snd_soc_dapm_set_endpoint(codec, "Line In", 1);
 121
 122         snd_soc_dapm_sync_endpoints(codec);
 123
 124         return 0;
 125 }
 126
 127 /* davinci-evm digital audio interface glue - connects codec <--> CPU */
 128 static struct snd_soc_dai_link evm_dai = {
 129         .name = "TLV320AIC3X",
 130         .stream_name = "AIC3X",
 131         .cpu_dai = &davinci_i2s_dai,
 132         .codec_dai = &aic3x_dai,
 133         .init = evm_aic3x_init,
 134         .ops = &evm_ops,
 135 };
 136
 137 /* davinci-evm audio machine driver */
 138 static struct snd_soc_machine snd_soc_machine_evm = {
 139         .name = "DaVinci EVM",
 140         .dai_link = &evm_dai,
 141         .num_links = 1,
 142 };
 143
 144 /* evm audio private data */
 145 static struct aic3x_setup_data evm_aic3x_setup = {
 146         .i2c_address = 0x1b,
 147 };
 148
 149 /* evm audio subsystem */
 150 static struct snd_soc_device evm_snd_devdata = {
 151         .machine = &snd_soc_machine_evm,
 152         .platform = &davinci_soc_platform,
 153         .codec_dev = &soc_codec_dev_aic3x,
 154         .codec_data = &evm_aic3x_setup,
 155 };
 156
 157 static struct resource evm_snd_resources[] = {
 158         {
 159                 .start = DAVINCI_MCBSP_BASE,
 160                 .end = DAVINCI_MCBSP_BASE + SZ_8K - 1,
 161                 .flags = IORESOURCE_MEM,
 162         },
 163 };
 164
 165 static struct evm_snd_platform_data evm_snd_data = {
 166         .tx_dma_ch      = DM644X_DMACH_MCBSP_TX,
 167         .rx_dma_ch      = DM644X_DMACH_MCBSP_RX,
 168 };
 169
 170 static struct platform_device *evm_snd_device;
 171
 172 static int __init evm_init(void)
 173 {
 174         int ret;
 175
 176         evm_snd_device = platform_device_alloc("soc-audio", 0);
 177         if (!evm_snd_device)
 178                 return -ENOMEM;
 179
 180         platform_set_drvdata(evm_snd_device, &evm_snd_devdata);
 181         evm_snd_devdata.dev = &evm_snd_device->dev;
 182         evm_snd_device->dev.platform_data = &evm_snd_data;
 183
 184         ret = platform_device_add_resources(evm_snd_device, evm_snd_resources,
 185                                             ARRAY_SIZE(evm_snd_resources));
 186         if (ret) {
 187                 platform_device_put(evm_snd_device);
 188                 return ret;
 189         }
 190
 191         ret = platform_device_add(evm_snd_device);
 192         if (ret)
 193                 platform_device_put(evm_snd_device);
 194
 195         return ret;
 196 }
 197
 198 static void __exit evm_exit(void)
 199 {
 200         platform_device_unregister(evm_snd_device);
 201 }
 202
 203 module_init(evm_init);
 204 module_exit(evm_exit);
 205
 206 MODULE_AUTHOR("Vladimir Barinov");
 207 MODULE_DESCRIPTION("TI DAVINCI EVM ASoC driver");
 208 MODULE_LICENSE("GPL");