sound/soc/ti/osk5912.c

   1 // SPDX-License-Identifier: GPL-2.0-only
   2 /*
   3  * osk5912.c  --  SoC audio for OSK 5912
   4  *
   5  * Copyright (C) 2008 Mistral Solutions
   6  *
   7  * Contact: Arun KS  <arunks@mistralsolutions.com>
   8  */
   9
  10 #include <linux/clk.h>
  11 #include <linux/platform_device.h>
  12 #include <sound/core.h>
  13 #include <sound/pcm.h>
  14 #include <sound/soc.h>
  15
  16 #include <asm/mach-types.h>
  17 #include <linux/module.h>
  18 #include <linux/platform_data/asoc-ti-mcbsp.h>
  19
  20 #include "omap-mcbsp.h"
  21 #include "../codecs/tlv320aic23.h"
  22
  23 #define CODEC_CLOCK     12000000
  24
  25 static struct clk *tlv320aic23_mclk;
  26
  27 static int osk_startup(struct snd_pcm_substream *substream)
  28 {
  29         return clk_prepare_enable(tlv320aic23_mclk);
  30 }
  31
  32 static void osk_shutdown(struct snd_pcm_substream *substream)
  33 {
  34         clk_disable_unprepare(tlv320aic23_mclk);
  35 }
  36
  37 static int osk_hw_params(struct snd_pcm_substream *substream,
  38                          struct snd_pcm_hw_params *params)
  39 {
  40         struct snd_soc_pcm_runtime *rtd = snd_soc_substream_to_rtd(substream);
  41         struct snd_soc_dai *codec_dai = snd_soc_rtd_to_codec(rtd, 0);
  42         int err;
  43
  44         /* Set the codec system clock for DAC and ADC */
  45         err =
  46             snd_soc_dai_set_sysclk(codec_dai, 0, CODEC_CLOCK, SND_SOC_CLOCK_IN);
  47
  48         if (err < 0) {
  49                 printk(KERN_ERR "can't set codec system clock\n");
  50                 return err;
  51         }
  52
  53         return err;
  54 }
  55
  56 static const struct snd_soc_ops osk_ops = {
  57         .startup = osk_startup,
  58         .hw_params = osk_hw_params,
  59         .shutdown = osk_shutdown,
  60 };
  61
  62 static const struct snd_soc_dapm_widget tlv320aic23_dapm_widgets[] = {
  63         SND_SOC_DAPM_HP("Headphone Jack", NULL),
  64         SND_SOC_DAPM_LINE("Line In", NULL),
  65         SND_SOC_DAPM_MIC("Mic Jack", NULL),
  66 };
  67
  68 static const struct snd_soc_dapm_route audio_map[] = {
  69         {"Headphone Jack", NULL, "LHPOUT"},
  70         {"Headphone Jack", NULL, "RHPOUT"},
  71
  72         {"LLINEIN", NULL, "Line In"},
  73         {"RLINEIN", NULL, "Line In"},
  74
  75         {"MICIN", NULL, "Mic Jack"},
  76 };
  77
  78 /* Digital audio interface glue - connects codec <--> CPU */
  79 SND_SOC_DAILINK_DEFS(aic23,
  80         DAILINK_COMP_ARRAY(COMP_CPU("omap-mcbsp.1")),
  81         DAILINK_COMP_ARRAY(COMP_CODEC("tlv320aic23-codec",
  82                                       "tlv320aic23-hifi")),
  83         DAILINK_COMP_ARRAY(COMP_PLATFORM("omap-mcbsp.1")));
  84
  85 static struct snd_soc_dai_link osk_dai = {
  86         .name = "TLV320AIC23",
  87         .stream_name = "AIC23",
  88         .dai_fmt = SND_SOC_DAIFMT_DSP_B | SND_SOC_DAIFMT_NB_NF |
  89                    SND_SOC_DAIFMT_CBM_CFM,
  90         .ops = &osk_ops,
  91         SND_SOC_DAILINK_REG(aic23),
  92 };
  93
  94 /* Audio machine driver */
  95 static struct snd_soc_card snd_soc_card_osk = {
  96         .name = "OSK5912",
  97         .owner = THIS_MODULE,
  98         .dai_link = &osk_dai,
  99         .num_links = 1,
 100
 101         .dapm_widgets = tlv320aic23_dapm_widgets,
 102         .num_dapm_widgets = ARRAY_SIZE(tlv320aic23_dapm_widgets),
 103         .dapm_routes = audio_map,
 104         .num_dapm_routes = ARRAY_SIZE(audio_map),
 105 };
 106
 107 static struct platform_device *osk_snd_device;
 108
 109 static int __init osk_soc_init(void)
 110 {
 111         int err;
 112         u32 curRate;
 113         struct device *dev;
 114
 115         if (!(machine_is_omap_osk()))
 116                 return -ENODEV;
 117
 118         osk_snd_device = platform_device_alloc("soc-audio", -1);
 119         if (!osk_snd_device)
 120                 return -ENOMEM;
 121
 122         platform_set_drvdata(osk_snd_device, &snd_soc_card_osk);
 123         err = platform_device_add(osk_snd_device);
 124         if (err)
 125                 goto err1;
 126
 127         dev = &osk_snd_device->dev;
 128
 129         tlv320aic23_mclk = clk_get(dev, "mclk");
 130         if (IS_ERR(tlv320aic23_mclk)) {
 131                 printk(KERN_ERR "Could not get mclk clock\n");
 132                 err = PTR_ERR(tlv320aic23_mclk);
 133                 goto err2;
 134         }
 135
 136         /*
 137          * Configure 12 MHz output on MCLK.
 138          */
 139         curRate = (uint) clk_get_rate(tlv320aic23_mclk);
 140         if (curRate != CODEC_CLOCK) {
 141                 if (clk_set_rate(tlv320aic23_mclk, CODEC_CLOCK)) {
 142                         printk(KERN_ERR "Cannot set MCLK for AIC23 CODEC\n");
 143                         err = -ECANCELED;
 144                         goto err3;
 145                 }
 146         }
 147
 148         printk(KERN_INFO "MCLK = %d [%d]\n",
 149                (uint) clk_get_rate(tlv320aic23_mclk), CODEC_CLOCK);
 150
 151         return 0;
 152
 153 err3:
 154         clk_put(tlv320aic23_mclk);
 155 err2:
 156         platform_device_del(osk_snd_device);
 157 err1:
 158         platform_device_put(osk_snd_device);
 159
 160         return err;
 161
 162 }
 163
 164 static void __exit osk_soc_exit(void)
 165 {
 166         clk_put(tlv320aic23_mclk);
 167         platform_device_unregister(osk_snd_device);
 168 }
 169
 170 module_init(osk_soc_init);
 171 module_exit(osk_soc_exit);
 172
 173 MODULE_AUTHOR("Arun KS <arunks@mistralsolutions.com>");
 174 MODULE_DESCRIPTION("ALSA SoC OSK 5912");
 175 MODULE_LICENSE("GPL");