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 = 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
  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 */
  80static 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 */
  93static 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
 105static struct platform_device *osk_snd_device;
 106
 107static 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
 151err3:
 152        clk_put(tlv320aic23_mclk);
 153err2:
 154        platform_device_del(osk_snd_device);
 155err1:
 156        platform_device_put(osk_snd_device);
 157
 158        return err;
 159
 160}
 161
 162static void __exit osk_soc_exit(void)
 163{
 164        clk_put(tlv320aic23_mclk);
 165        platform_device_unregister(osk_snd_device);
 166}
 167
 168module_init(osk_soc_init);
 169module_exit(osk_soc_exit);
 170
 171MODULE_AUTHOR("Arun KS <arunks@mistralsolutions.com>");
 172MODULE_DESCRIPTION("ALSA SoC OSK 5912");
 173MODULE_LICENSE("GPL");
 174