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/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
  25static struct clk *tlv320aic23_mclk;
  26
  27static int osk_startup(struct snd_pcm_substream *substream)
  28{
  29        return clk_prepare_enable(tlv320aic23_mclk);
  30}
  31
  32static void osk_shutdown(struct snd_pcm_substream *substream)
  33{
  34        clk_disable_unprepare(tlv320aic23_mclk);
  35}
  36
  37static 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
  56static const struct snd_soc_ops osk_ops = {
  57        .startup = osk_startup,
  58        .hw_params = osk_hw_params,
  59        .shutdown = osk_shutdown,
  60};
  61
  62static 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
  68static 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 */
  79SND_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
  85static 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_CBP_CFP,
  90        .ops = &osk_ops,
  91        SND_SOC_DAILINK_REG(aic23),
  92};
  93
  94/* Audio machine driver */
  95static 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
 107static struct platform_device *osk_snd_device;
 108
 109static 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
 153err3:
 154        clk_put(tlv320aic23_mclk);
 155err2:
 156        platform_device_del(osk_snd_device);
 157err1:
 158        platform_device_put(osk_snd_device);
 159
 160        return err;
 161
 162}
 163
 164static void __exit osk_soc_exit(void)
 165{
 166        clk_put(tlv320aic23_mclk);
 167        platform_device_unregister(osk_snd_device);
 168}
 169
 170module_init(osk_soc_init);
 171module_exit(osk_soc_exit);
 172
 173MODULE_AUTHOR("Arun KS <arunks@mistralsolutions.com>");
 174MODULE_DESCRIPTION("ALSA SoC OSK 5912");
 175MODULE_LICENSE("GPL");
 176