LXR linux/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
  26static struct clk *tlv320aic23_mclk;
  27
  28static int osk_startup(struct snd_pcm_substream *substream)
  29{
  30        return clk_enable(tlv320aic23_mclk);
  31}
  32
  33static void osk_shutdown(struct snd_pcm_substream *substream)
  34{
  35        clk_disable(tlv320aic23_mclk);
  36}
  37
  38static int osk_hw_params(struct snd_pcm_substream *substream,
  39                         struct snd_pcm_hw_params *params)
  40{
  41        struct snd_soc_pcm_runtime *rtd = asoc_substream_to_rtd(substream);
  42        struct snd_soc_dai *codec_dai = asoc_rtd_to_codec(rtd, 0);
  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
  57static const struct snd_soc_ops osk_ops = {
  58        .startup = osk_startup,
  59        .hw_params = osk_hw_params,
  60        .shutdown = osk_shutdown,
  61};
  62
  63static 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
  69static 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 */
  80SND_SOC_DAILINK_DEFS(aic23,
  81        DAILINK_COMP_ARRAY(COMP_CPU("omap-mcbsp.1")),
  82        DAILINK_COMP_ARRAY(COMP_CODEC("tlv320aic23-codec",
  83                                      "tlv320aic23-hifi")),
  84        DAILINK_COMP_ARRAY(COMP_PLATFORM("omap-mcbsp.1")));
  85
  86static struct snd_soc_dai_link osk_dai = {
  87        .name = "TLV320AIC23",
  88        .stream_name = "AIC23",
  89        .dai_fmt = SND_SOC_DAIFMT_DSP_B | SND_SOC_DAIFMT_NB_NF |
  90                   SND_SOC_DAIFMT_CBM_CFM,
  91        .ops = &osk_ops,
  92        SND_SOC_DAILINK_REG(aic23),
  93};
  94
  95/* Audio machine driver */
  96static struct snd_soc_card snd_soc_card_osk = {
  97        .name = "OSK5912",
  98        .owner = THIS_MODULE,
  99        .dai_link = &osk_dai,
 100        .num_links = 1,
 101
 102        .dapm_widgets = tlv320aic23_dapm_widgets,
 103        .num_dapm_widgets = ARRAY_SIZE(tlv320aic23_dapm_widgets),
 104        .dapm_routes = audio_map,
 105        .num_dapm_routes = ARRAY_SIZE(audio_map),
 106};
 107
 108static struct platform_device *osk_snd_device;
 109
 110static int __init osk_soc_init(void)
 111{
 112        int err;
 113        u32 curRate;
 114        struct device *dev;
 115
 116        if (!(machine_is_omap_osk()))
 117                return -ENODEV;
 118
 119        osk_snd_device = platform_device_alloc("soc-audio", -1);
 120        if (!osk_snd_device)
 121                return -ENOMEM;
 122
 123        platform_set_drvdata(osk_snd_device, &snd_soc_card_osk);
 124        err = platform_device_add(osk_snd_device);
 125        if (err)
 126                goto err1;
 127
 128        dev = &osk_snd_device->dev;
 129
 130        tlv320aic23_mclk = clk_get(dev, "mclk");
 131        if (IS_ERR(tlv320aic23_mclk)) {
 132                printk(KERN_ERR "Could not get mclk clock\n");
 133                err = PTR_ERR(tlv320aic23_mclk);
 134                goto err2;
 135        }
 136
 137        /*
 138         * Configure 12 MHz output on MCLK.
 139         */
 140        curRate = (uint) clk_get_rate(tlv320aic23_mclk);
 141        if (curRate != CODEC_CLOCK) {
 142                if (clk_set_rate(tlv320aic23_mclk, CODEC_CLOCK)) {
 143                        printk(KERN_ERR "Cannot set MCLK for AIC23 CODEC\n");
 144                        err = -ECANCELED;
 145                        goto err3;
 146                }
 147        }
 148
 149        printk(KERN_INFO "MCLK = %d [%d]\n",
 150               (uint) clk_get_rate(tlv320aic23_mclk), CODEC_CLOCK);
 151
 152        return 0;
 153
 154err3:
 155        clk_put(tlv320aic23_mclk);
 156err2:
 157        platform_device_del(osk_snd_device);
 158err1:
 159        platform_device_put(osk_snd_device);
 160
 161        return err;
 162
 163}
 164
 165static void __exit osk_soc_exit(void)
 166{
 167        clk_put(tlv320aic23_mclk);
 168        platform_device_unregister(osk_snd_device);
 169}
 170
 171module_init(osk_soc_init);
 172module_exit(osk_soc_exit);
 173
 174MODULE_AUTHOR("Arun KS <arunks@mistralsolutions.com>");
 175MODULE_DESCRIPTION("ALSA SoC OSK 5912");
 176MODULE_LICENSE("GPL");
 177