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