sound/soc/bcm/i-sabre-q2m.c

   1 /*
   2  * ASoC Driver for I-Sabre Q2M
   3  *
   4  * Author: Satoru Kawase
   5  * Modified by: Xiao Qingyong
   6  * Update kernel v4.18+ by : Audiophonics
   7  *              Copyright 2018 Audiophonics
   8  *
   9  * This program is free software; you can redistribute it and/or
  10  * modify it under the terms of the GNU General Public License
  11  * version 2 as published by the Free Software Foundation.
  12  *
  13  * This program is distributed in the hope that it will be useful, but
  14  * WITHOUT ANY WARRANTY; without even the implied warranty of
  15  * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the GNU
  16  * General Public License for more details.
  17  */
  18
  19 #include <linux/kernel.h>
  20 #include <linux/init.h>
  21 #include <linux/module.h>
  22 #include <linux/delay.h>
  23 #include <linux/fs.h>
  24 #include <asm/uaccess.h>
  25 #include <sound/core.h>
  26 #include <sound/soc.h>
  27 #include <sound/pcm.h>
  28 #include <sound/pcm_params.h>
  29
  30 #include "../codecs/i-sabre-codec.h"
  31
  32
  33 static int snd_rpi_i_sabre_q2m_init(struct snd_soc_pcm_runtime *rtd)
  34 {
  35         struct snd_soc_component *component = asoc_rtd_to_codec(rtd, 0)->component;
  36         unsigned int value;
  37
  38         /* Device ID */
  39         value = snd_soc_component_read(component, ISABRECODEC_REG_01);
  40         dev_info(component->card->dev, "Audiophonics Device ID : %02X\n", value);
  41
  42         /* API revision */
  43         value = snd_soc_component_read(component, ISABRECODEC_REG_02);
  44         dev_info(component->card->dev, "Audiophonics API revision : %02X\n", value);
  45
  46         return 0;
  47 }
  48
  49 static int snd_rpi_i_sabre_q2m_hw_params(
  50         struct snd_pcm_substream *substream, struct snd_pcm_hw_params *params)
  51 {
  52         struct snd_soc_pcm_runtime *rtd     = substream->private_data;
  53         struct snd_soc_dai         *cpu_dai = asoc_rtd_to_cpu(rtd, 0);
  54         int bclk_ratio;
  55
  56         bclk_ratio = snd_pcm_format_physical_width(
  57                         params_format(params)) * params_channels(params);
  58         return snd_soc_dai_set_bclk_ratio(cpu_dai, bclk_ratio);
  59 }
  60
  61 /* machine stream operations */
  62 static struct snd_soc_ops snd_rpi_i_sabre_q2m_ops = {
  63         .hw_params = snd_rpi_i_sabre_q2m_hw_params,
  64 };
  65
  66 SND_SOC_DAILINK_DEFS(rpi_i_sabre_q2m,
  67         DAILINK_COMP_ARRAY(COMP_CPU("bcm2708-i2s.0")),
  68         DAILINK_COMP_ARRAY(COMP_CODEC("i-sabre-codec-i2c.1-0048", "i-sabre-codec-dai")),
  69         DAILINK_COMP_ARRAY(COMP_PLATFORM("bcm2708-i2s.0")));
  70
  71 static struct snd_soc_dai_link snd_rpi_i_sabre_q2m_dai[] = {
  72         {
  73                 .name           = "I-Sabre Q2M",
  74                 .stream_name    = "I-Sabre Q2M DAC",
  75                 .dai_fmt        = SND_SOC_DAIFMT_I2S | SND_SOC_DAIFMT_NB_NF
  76                                                 | SND_SOC_DAIFMT_CBS_CFS,
  77                 .init           = snd_rpi_i_sabre_q2m_init,
  78                 .ops            = &snd_rpi_i_sabre_q2m_ops,
  79                 SND_SOC_DAILINK_REG(rpi_i_sabre_q2m),
  80         }
  81 };
  82
  83 /* audio machine driver */
  84 static struct snd_soc_card snd_rpi_i_sabre_q2m = {
  85         .name      = "I-Sabre Q2M DAC",
  86         .owner     = THIS_MODULE,
  87         .dai_link  = snd_rpi_i_sabre_q2m_dai,
  88         .num_links = ARRAY_SIZE(snd_rpi_i_sabre_q2m_dai)
  89 };
  90
  91
  92 static int snd_rpi_i_sabre_q2m_probe(struct platform_device *pdev)
  93 {
  94         int ret = 0;
  95
  96         snd_rpi_i_sabre_q2m.dev = &pdev->dev;
  97         if (pdev->dev.of_node) {
  98                 struct device_node *i2s_node;
  99                 struct snd_soc_dai_link *dai;
 100
 101                 dai = &snd_rpi_i_sabre_q2m_dai[0];
 102                 i2s_node = of_parse_phandle(pdev->dev.of_node,
 103                                                         "i2s-controller", 0);
 104                 if (i2s_node) {
 105                         dai->cpus->dai_name     = NULL;
 106                         dai->cpus->of_node      = i2s_node;
 107                         dai->platforms->name    = NULL;
 108                         dai->platforms->of_node = i2s_node;
 109                 } else {
 110                         dev_err(&pdev->dev,
 111                             "Property 'i2s-controller' missing or invalid\n");
 112                         return (-EINVAL);
 113                 }
 114
 115                 dai->name        = "I-Sabre Q2M";
 116                 dai->stream_name = "I-Sabre Q2M DAC";
 117                 dai->dai_fmt     = SND_SOC_DAIFMT_I2S
 118                                         | SND_SOC_DAIFMT_NB_NF
 119                                         | SND_SOC_DAIFMT_CBS_CFS;
 120         }
 121
 122         /* Wait for registering codec driver */
 123         mdelay(50);
 124
 125         ret = snd_soc_register_card(&snd_rpi_i_sabre_q2m);
 126         if (ret) {
 127                 dev_err(&pdev->dev,
 128                         "snd_soc_register_card() failed: %d\n", ret);
 129         }
 130
 131         return ret;
 132 }
 133
 134 static int snd_rpi_i_sabre_q2m_remove(struct platform_device *pdev)
 135 {
 136         return snd_soc_unregister_card(&snd_rpi_i_sabre_q2m);
 137 }
 138
 139 static const struct of_device_id snd_rpi_i_sabre_q2m_of_match[] = {
 140         { .compatible = "audiophonics,i-sabre-q2m", },
 141         {}
 142 };
 143 MODULE_DEVICE_TABLE(of, snd_rpi_i_sabre_q2m_of_match);
 144
 145 static struct platform_driver snd_rpi_i_sabre_q2m_driver = {
 146         .driver = {
 147                 .name           = "snd-rpi-i-sabre-q2m",
 148                 .owner          = THIS_MODULE,
 149                 .of_match_table = snd_rpi_i_sabre_q2m_of_match,
 150         },
 151         .probe  = snd_rpi_i_sabre_q2m_probe,
 152         .remove = snd_rpi_i_sabre_q2m_remove,
 153 };
 154 module_platform_driver(snd_rpi_i_sabre_q2m_driver);
 155
 156 MODULE_DESCRIPTION("ASoC Driver for I-Sabre Q2M");
 157 MODULE_AUTHOR("Audiophonics <http://www.audiophonics.fr>");
 158 MODULE_LICENSE("GPL");