sound/soc/davinci/davinci-sffsdr.c

   1 /*
   2  * ASoC driver for Lyrtech SFFSDR board.
   3  *
   4  * Author:      Hugo Villeneuve
   5  * Copyright (C) 2008 Lyrtech inc
   6  *
   7  * Based on ASoC driver for TI DAVINCI EVM platform, original copyright follow:
   8  * Copyright:   (C) 2007 MontaVista Software, Inc., <source@mvista.com>
   9  *
  10  * This program is free software; you can redistribute it and/or modify
  11  * it under the terms of the GNU General Public License version 2 as
  12  * published by the Free Software Foundation.
  13  */
  14
  15 #include <linux/module.h>
  16 #include <linux/moduleparam.h>
  17 #include <linux/timer.h>
  18 #include <linux/interrupt.h>
  19 #include <linux/platform_device.h>
  20 #include <linux/gpio.h>
  21 #include <sound/core.h>
  22 #include <sound/pcm.h>
  23 #include <sound/soc.h>
  24 #include <sound/soc-dapm.h>
  25
  26 #include <asm/dma.h>
  27 #include <asm/mach-types.h>
  28 #include <asm/plat-sffsdr/sffsdr-fpga.h>
  29
  30 #include <mach/mcbsp.h>
  31 #include <mach/edma.h>
  32
  33 #include "../codecs/pcm3008.h"
  34 #include "davinci-pcm.h"
  35 #include "davinci-i2s.h"
  36
  37 static int sffsdr_hw_params(struct snd_pcm_substream *substream,
  38                             struct snd_pcm_hw_params *params,
  39                             struct snd_soc_dai *dai)
  40 {
  41         struct snd_soc_pcm_runtime *rtd = substream->private_data;
  42         struct snd_soc_dai *cpu_dai = rtd->dai->cpu_dai;
  43         int fs;
  44         int ret = 0;
  45
  46         /* Set cpu DAI configuration:
  47          * CLKX and CLKR are the inputs for the Sample Rate Generator.
  48          * FSX and FSR are outputs, driven by the sample Rate Generator. */
  49         ret = snd_soc_dai_set_fmt(cpu_dai,
  50                                   SND_SOC_DAIFMT_RIGHT_J |
  51                                   SND_SOC_DAIFMT_CBM_CFS |
  52                                   SND_SOC_DAIFMT_IB_NF);
  53         if (ret < 0)
  54                 return ret;
  55
  56         /* Fsref can be 32000, 44100 or 48000. */
  57         fs = params_rate(params);
  58
  59         pr_debug("sffsdr_hw_params: rate = %d Hz\n", fs);
  60
  61         return sffsdr_fpga_set_codec_fs(fs);
  62 }
  63
  64 static struct snd_soc_ops sffsdr_ops = {
  65         .hw_params = sffsdr_hw_params,
  66 };
  67
  68 /* davinci-sffsdr digital audio interface glue - connects codec <--> CPU */
  69 static struct snd_soc_dai_link sffsdr_dai = {
  70         .name = "PCM3008", /* Codec name */
  71         .stream_name = "PCM3008 HiFi",
  72         .cpu_dai = &davinci_i2s_dai,
  73         .codec_dai = &pcm3008_dai,
  74         .ops = &sffsdr_ops,
  75 };
  76
  77 /* davinci-sffsdr audio machine driver */
  78 static struct snd_soc_card snd_soc_sffsdr = {
  79         .name = "DaVinci SFFSDR",
  80         .platform = &davinci_soc_platform,
  81         .dai_link = &sffsdr_dai,
  82         .num_links = 1,
  83 };
  84
  85 /* sffsdr audio private data */
  86 static struct pcm3008_setup_data sffsdr_pcm3008_setup = {
  87         .dem0_pin = GPIO(45),
  88         .dem1_pin = GPIO(46),
  89         .pdad_pin = GPIO(47),
  90         .pdda_pin = GPIO(38),
  91 };
  92
  93 /* sffsdr audio subsystem */
  94 static struct snd_soc_device sffsdr_snd_devdata = {
  95         .card = &snd_soc_sffsdr,
  96         .codec_dev = &soc_codec_dev_pcm3008,
  97         .codec_data = &sffsdr_pcm3008_setup,
  98 };
  99
 100 static struct resource sffsdr_snd_resources[] = {
 101         {
 102                 .start = DAVINCI_MCBSP_BASE,
 103                 .end = DAVINCI_MCBSP_BASE + SZ_8K - 1,
 104                 .flags = IORESOURCE_MEM,
 105         },
 106 };
 107
 108 static struct evm_snd_platform_data sffsdr_snd_data = {
 109         .tx_dma_ch      = DAVINCI_DMA_MCBSP_TX,
 110         .rx_dma_ch      = DAVINCI_DMA_MCBSP_RX,
 111 };
 112
 113 static struct platform_device *sffsdr_snd_device;
 114
 115 static int __init sffsdr_init(void)
 116 {
 117         int ret;
 118
 119         if (!machine_is_sffsdr())
 120                 return -EINVAL;
 121
 122         sffsdr_snd_device = platform_device_alloc("soc-audio", 0);
 123         if (!sffsdr_snd_device) {
 124                 printk(KERN_ERR "platform device allocation failed\n");
 125                 return -ENOMEM;
 126         }
 127
 128         platform_set_drvdata(sffsdr_snd_device, &sffsdr_snd_devdata);
 129         sffsdr_snd_devdata.dev = &sffsdr_snd_device->dev;
 130         sffsdr_snd_device->dev.platform_data = &sffsdr_snd_data;
 131
 132         ret = platform_device_add_resources(sffsdr_snd_device,
 133                                             sffsdr_snd_resources,
 134                                             ARRAY_SIZE(sffsdr_snd_resources));
 135         if (ret) {
 136                 printk(KERN_ERR "platform device add ressources failed\n");
 137                 goto error;
 138         }
 139
 140         ret = platform_device_add(sffsdr_snd_device);
 141         if (ret)
 142                 goto error;
 143
 144         return ret;
 145
 146 error:
 147         platform_device_put(sffsdr_snd_device);
 148         return ret;
 149 }
 150
 151 static void __exit sffsdr_exit(void)
 152 {
 153         platform_device_unregister(sffsdr_snd_device);
 154 }
 155
 156 module_init(sffsdr_init);
 157 module_exit(sffsdr_exit);
 158
 159 MODULE_AUTHOR("Hugo Villeneuve");
 160 MODULE_DESCRIPTION("Lyrtech SFFSDR ASoC driver");
 161 MODULE_LICENSE("GPL");