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 <asm/mach-types.h>
  24
  25 #include <mach/asp.h>
  26 #include <mach/edma.h>
  27 #include <mach/mux.h>
  28
  29 #include "../codecs/tlv320aic3x.h"
  30 #include "davinci-pcm.h"
  31 #include "davinci-i2s.h"
  32
  33
  34 #define AUDIO_FORMAT (SND_SOC_DAIFMT_DSP_B | \
  35                 SND_SOC_DAIFMT_CBM_CFM | SND_SOC_DAIFMT_IB_NF)
  36 static int evm_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->dai->codec_dai;
  41         struct snd_soc_dai *cpu_dai = rtd->dai->cpu_dai;
  42         int ret = 0;
  43         unsigned sysclk;
  44
  45         /* ASP1 on DM355 EVM is clocked by an external oscillator */
  46         if (machine_is_davinci_dm355_evm())
  47                 sysclk = 27000000;
  48
  49         /* ASP0 in DM6446 EVM is clocked by U55, as configured by
  50          * board-dm644x-evm.c using GPIOs from U18.  There are six
  51          * options; here we "know" we use a 48 KHz sample rate.
  52          */
  53         else if (machine_is_davinci_evm())
  54                 sysclk = 12288000;
  55
  56         else
  57                 return -EINVAL;
  58
  59         /* set codec DAI configuration */
  60         ret = snd_soc_dai_set_fmt(codec_dai, AUDIO_FORMAT);
  61         if (ret < 0)
  62                 return ret;
  63
  64         /* set cpu DAI configuration */
  65         ret = snd_soc_dai_set_fmt(cpu_dai, AUDIO_FORMAT);
  66         if (ret < 0)
  67                 return ret;
  68
  69         /* set the codec system clock */
  70         ret = snd_soc_dai_set_sysclk(codec_dai, 0, sysclk, SND_SOC_CLOCK_OUT);
  71         if (ret < 0)
  72                 return ret;
  73
  74         return 0;
  75 }
  76
  77 static struct snd_soc_ops evm_ops = {
  78         .hw_params = evm_hw_params,
  79 };
  80
  81 /* davinci-evm machine dapm widgets */
  82 static const struct snd_soc_dapm_widget aic3x_dapm_widgets[] = {
  83         SND_SOC_DAPM_HP("Headphone Jack", NULL),
  84         SND_SOC_DAPM_LINE("Line Out", NULL),
  85         SND_SOC_DAPM_MIC("Mic Jack", NULL),
  86         SND_SOC_DAPM_LINE("Line In", NULL),
  87 };
  88
  89 /* davinci-evm machine audio_mapnections to the codec pins */
  90 static const struct snd_soc_dapm_route audio_map[] = {
  91         /* Headphone connected to HPLOUT, HPROUT */
  92         {"Headphone Jack", NULL, "HPLOUT"},
  93         {"Headphone Jack", NULL, "HPROUT"},
  94
  95         /* Line Out connected to LLOUT, RLOUT */
  96         {"Line Out", NULL, "LLOUT"},
  97         {"Line Out", NULL, "RLOUT"},
  98
  99         /* Mic connected to (MIC3L | MIC3R) */
 100         {"MIC3L", NULL, "Mic Bias 2V"},
 101         {"MIC3R", NULL, "Mic Bias 2V"},
 102         {"Mic Bias 2V", NULL, "Mic Jack"},
 103
 104         /* Line In connected to (LINE1L | LINE2L), (LINE1R | LINE2R) */
 105         {"LINE1L", NULL, "Line In"},
 106         {"LINE2L", NULL, "Line In"},
 107         {"LINE1R", NULL, "Line In"},
 108         {"LINE2R", NULL, "Line In"},
 109 };
 110
 111 /* Logic for a aic3x as connected on a davinci-evm */
 112 static int evm_aic3x_init(struct snd_soc_codec *codec)
 113 {
 114         /* Add davinci-evm specific widgets */
 115         snd_soc_dapm_new_controls(codec, aic3x_dapm_widgets,
 116                                   ARRAY_SIZE(aic3x_dapm_widgets));
 117
 118         /* Set up davinci-evm specific audio path audio_map */
 119         snd_soc_dapm_add_routes(codec, audio_map, ARRAY_SIZE(audio_map));
 120
 121         /* not connected */
 122         snd_soc_dapm_disable_pin(codec, "MONO_LOUT");
 123         snd_soc_dapm_disable_pin(codec, "HPLCOM");
 124         snd_soc_dapm_disable_pin(codec, "HPRCOM");
 125
 126         /* always connected */
 127         snd_soc_dapm_enable_pin(codec, "Headphone Jack");
 128         snd_soc_dapm_enable_pin(codec, "Line Out");
 129         snd_soc_dapm_enable_pin(codec, "Mic Jack");
 130         snd_soc_dapm_enable_pin(codec, "Line In");
 131
 132         snd_soc_dapm_sync(codec);
 133
 134         return 0;
 135 }
 136
 137 /* davinci-evm digital audio interface glue - connects codec <--> CPU */
 138 static struct snd_soc_dai_link evm_dai = {
 139         .name = "TLV320AIC3X",
 140         .stream_name = "AIC3X",
 141         .cpu_dai = &davinci_i2s_dai,
 142         .codec_dai = &aic3x_dai,
 143         .init = evm_aic3x_init,
 144         .ops = &evm_ops,
 145 };
 146
 147 /* davinci-evm audio machine driver */
 148 static struct snd_soc_card snd_soc_card_evm = {
 149         .name = "DaVinci EVM",
 150         .platform = &davinci_soc_platform,
 151         .dai_link = &evm_dai,
 152         .num_links = 1,
 153 };
 154
 155 /* evm audio private data */
 156 static struct aic3x_setup_data evm_aic3x_setup = {
 157         .i2c_bus = 1,
 158         .i2c_address = 0x1b,
 159 };
 160
 161 /* evm audio subsystem */
 162 static struct snd_soc_device evm_snd_devdata = {
 163         .card = &snd_soc_card_evm,
 164         .codec_dev = &soc_codec_dev_aic3x,
 165         .codec_data = &evm_aic3x_setup,
 166 };
 167
 168 /* DM6446 EVM uses ASP0; line-out is a pair of RCA jacks */
 169 static struct resource evm_snd_resources[] = {
 170         {
 171                 .start = DAVINCI_ASP0_BASE,
 172                 .end = DAVINCI_ASP0_BASE + SZ_8K - 1,
 173                 .flags = IORESOURCE_MEM,
 174         },
 175 };
 176
 177 static struct evm_snd_platform_data evm_snd_data = {
 178         .tx_dma_ch      = DAVINCI_DMA_ASP0_TX,
 179         .rx_dma_ch      = DAVINCI_DMA_ASP0_RX,
 180 };
 181
 182 /* DM335 EVM uses ASP1; line-out is a stereo mini-jack */
 183 static struct resource dm335evm_snd_resources[] = {
 184         {
 185                 .start = DAVINCI_ASP1_BASE,
 186                 .end = DAVINCI_ASP1_BASE + SZ_8K - 1,
 187                 .flags = IORESOURCE_MEM,
 188         },
 189 };
 190
 191 static struct evm_snd_platform_data dm335evm_snd_data = {
 192         .tx_dma_ch      = DAVINCI_DMA_ASP1_TX,
 193         .rx_dma_ch      = DAVINCI_DMA_ASP1_RX,
 194 };
 195
 196 static struct platform_device *evm_snd_device;
 197
 198 static int __init evm_init(void)
 199 {
 200         struct resource *resources;
 201         unsigned num_resources;
 202         struct evm_snd_platform_data *data;
 203         int index;
 204         int ret;
 205
 206         if (machine_is_davinci_evm()) {
 207                 davinci_cfg_reg(DM644X_MCBSP);
 208
 209                 resources = evm_snd_resources;
 210                 num_resources = ARRAY_SIZE(evm_snd_resources);
 211                 data = &evm_snd_data;
 212                 index = 0;
 213         } else if (machine_is_davinci_dm355_evm()) {
 214                 /* we don't use ASP1 IRQs, or we'd need to mux them ... */
 215                 davinci_cfg_reg(DM355_EVT8_ASP1_TX);
 216                 davinci_cfg_reg(DM355_EVT9_ASP1_RX);
 217
 218                 resources = dm335evm_snd_resources;
 219                 num_resources = ARRAY_SIZE(dm335evm_snd_resources);
 220                 data = &dm335evm_snd_data;
 221                 index = 1;
 222         } else
 223                 return -EINVAL;
 224
 225         evm_snd_device = platform_device_alloc("soc-audio", index);
 226         if (!evm_snd_device)
 227                 return -ENOMEM;
 228
 229         platform_set_drvdata(evm_snd_device, &evm_snd_devdata);
 230         evm_snd_devdata.dev = &evm_snd_device->dev;
 231         platform_device_add_data(evm_snd_device, data, sizeof(*data));
 232
 233         ret = platform_device_add_resources(evm_snd_device, resources,
 234                         num_resources);
 235         if (ret) {
 236                 platform_device_put(evm_snd_device);
 237                 return ret;
 238         }
 239
 240         ret = platform_device_add(evm_snd_device);
 241         if (ret)
 242                 platform_device_put(evm_snd_device);
 243
 244         return ret;
 245 }
 246
 247 static void __exit evm_exit(void)
 248 {
 249         platform_device_unregister(evm_snd_device);
 250 }
 251
 252 module_init(evm_init);
 253 module_exit(evm_exit);
 254
 255 MODULE_AUTHOR("Vladimir Barinov");
 256 MODULE_DESCRIPTION("TI DAVINCI EVM ASoC driver");
 257 MODULE_LICENSE("GPL");