LXR linux/sound/soc/ti/davinci-evm.c

   1// SPDX-License-Identifier: GPL-2.0-only
   2/*
   3 * ASoC driver for TI DAVINCI EVM platform
   4 *
   5 * Author:      Vladimir Barinov, <vbarinov@embeddedalley.com>
   6 * Copyright:   (C) 2007 MontaVista Software, Inc., <source@mvista.com>
   7 */
   8
   9#include <linux/module.h>
  10#include <linux/moduleparam.h>
  11#include <linux/timer.h>
  12#include <linux/interrupt.h>
  13#include <linux/platform_device.h>
  14#include <linux/i2c.h>
  15#include <linux/of_platform.h>
  16#include <linux/clk.h>
  17#include <sound/core.h>
  18#include <sound/pcm.h>
  19#include <sound/soc.h>
  20
  21#include <asm/dma.h>
  22#include <asm/mach-types.h>
  23
  24struct snd_soc_card_drvdata_davinci {
  25        struct clk *mclk;
  26        unsigned sysclk;
  27};
  28
  29static int evm_startup(struct snd_pcm_substream *substream)
  30{
  31        struct snd_soc_pcm_runtime *rtd = snd_soc_substream_to_rtd(substream);
  32        struct snd_soc_card *soc_card = rtd->card;
  33        struct snd_soc_card_drvdata_davinci *drvdata =
  34                snd_soc_card_get_drvdata(soc_card);
  35
  36        if (drvdata->mclk)
  37                return clk_prepare_enable(drvdata->mclk);
  38
  39        return 0;
  40}
  41
  42static void evm_shutdown(struct snd_pcm_substream *substream)
  43{
  44        struct snd_soc_pcm_runtime *rtd = snd_soc_substream_to_rtd(substream);
  45        struct snd_soc_card *soc_card = rtd->card;
  46        struct snd_soc_card_drvdata_davinci *drvdata =
  47                snd_soc_card_get_drvdata(soc_card);
  48
  49        clk_disable_unprepare(drvdata->mclk);
  50}
  51
  52static int evm_hw_params(struct snd_pcm_substream *substream,
  53                         struct snd_pcm_hw_params *params)
  54{
  55        struct snd_soc_pcm_runtime *rtd = snd_soc_substream_to_rtd(substream);
  56        struct snd_soc_dai *codec_dai = snd_soc_rtd_to_codec(rtd, 0);
  57        struct snd_soc_dai *cpu_dai = snd_soc_rtd_to_cpu(rtd, 0);
  58        struct snd_soc_card *soc_card = rtd->card;
  59        int ret = 0;
  60        unsigned sysclk = ((struct snd_soc_card_drvdata_davinci *)
  61                           snd_soc_card_get_drvdata(soc_card))->sysclk;
  62
  63        /* set the codec system clock */
  64        ret = snd_soc_dai_set_sysclk(codec_dai, 0, sysclk, SND_SOC_CLOCK_OUT);
  65        if (ret < 0)
  66                return ret;
  67
  68        /* set the CPU system clock */
  69        ret = snd_soc_dai_set_sysclk(cpu_dai, 0, sysclk, SND_SOC_CLOCK_OUT);
  70        if (ret < 0 && ret != -ENOTSUPP)
  71                return ret;
  72
  73        return 0;
  74}
  75
  76static const struct snd_soc_ops evm_ops = {
  77        .startup = evm_startup,
  78        .shutdown = evm_shutdown,
  79        .hw_params = evm_hw_params,
  80};
  81
  82/* davinci-evm machine dapm widgets */
  83static const struct snd_soc_dapm_widget aic3x_dapm_widgets[] = {
  84        SND_SOC_DAPM_HP("Headphone Jack", NULL),
  85        SND_SOC_DAPM_LINE("Line Out", NULL),
  86        SND_SOC_DAPM_MIC("Mic Jack", NULL),
  87        SND_SOC_DAPM_LINE("Line In", NULL),
  88};
  89
  90/* davinci-evm machine audio_mapnections to the codec pins */
  91static const struct snd_soc_dapm_route audio_map[] = {
  92        /* Headphone connected to HPLOUT, HPROUT */
  93        {"Headphone Jack", NULL, "HPLOUT"},
  94        {"Headphone Jack", NULL, "HPROUT"},
  95
  96        /* Line Out connected to LLOUT, RLOUT */
  97        {"Line Out", NULL, "LLOUT"},
  98        {"Line Out", NULL, "RLOUT"},
  99
 100        /* Mic connected to (MIC3L | MIC3R) */
 101        {"MIC3L", NULL, "Mic Bias"},
 102        {"MIC3R", NULL, "Mic Bias"},
 103        {"Mic Bias", NULL, "Mic Jack"},
 104
 105        /* Line In connected to (LINE1L | LINE2L), (LINE1R | LINE2R) */
 106        {"LINE1L", NULL, "Line In"},
 107        {"LINE2L", NULL, "Line In"},
 108        {"LINE1R", NULL, "Line In"},
 109        {"LINE2R", NULL, "Line In"},
 110};
 111
 112/* Logic for a aic3x as connected on a davinci-evm */
 113static int evm_aic3x_init(struct snd_soc_pcm_runtime *rtd)
 114{
 115        struct snd_soc_card *card = rtd->card;
 116        struct device_node *np = card->dev->of_node;
 117        int ret;
 118
 119        /* Add davinci-evm specific widgets */
 120        snd_soc_dapm_new_controls(&card->dapm, aic3x_dapm_widgets,
 121                                  ARRAY_SIZE(aic3x_dapm_widgets));
 122
 123        if (np) {
 124                ret = snd_soc_of_parse_audio_routing(card, "ti,audio-routing");
 125                if (ret)
 126                        return ret;
 127        } else {
 128                /* Set up davinci-evm specific audio path audio_map */
 129                snd_soc_dapm_add_routes(&card->dapm, audio_map,
 130                                        ARRAY_SIZE(audio_map));
 131        }
 132
 133        /* not connected */
 134        snd_soc_dapm_nc_pin(&card->dapm, "MONO_LOUT");
 135        snd_soc_dapm_nc_pin(&card->dapm, "HPLCOM");
 136        snd_soc_dapm_nc_pin(&card->dapm, "HPRCOM");
 137
 138        return 0;
 139}
 140
 141/*
 142 * The struct is used as place holder. It will be completely
 143 * filled with data from dt node.
 144 */
 145SND_SOC_DAILINK_DEFS(evm,
 146        DAILINK_COMP_ARRAY(COMP_EMPTY()),
 147        DAILINK_COMP_ARRAY(COMP_CODEC(NULL, "tlv320aic3x-hifi")),
 148        DAILINK_COMP_ARRAY(COMP_EMPTY()));
 149
 150static struct snd_soc_dai_link evm_dai_tlv320aic3x = {
 151        .name           = "TLV320AIC3X",
 152        .stream_name    = "AIC3X",
 153        .ops            = &evm_ops,
 154        .init           = evm_aic3x_init,
 155        .dai_fmt = SND_SOC_DAIFMT_DSP_B | SND_SOC_DAIFMT_CBP_CFP |
 156                   SND_SOC_DAIFMT_IB_NF,
 157        SND_SOC_DAILINK_REG(evm),
 158};
 159
 160static const struct of_device_id davinci_evm_dt_ids[] = {
 161        {
 162                .compatible = "ti,da830-evm-audio",
 163                .data = (void *) &evm_dai_tlv320aic3x,
 164        },
 165        { /* sentinel */ }
 166};
 167MODULE_DEVICE_TABLE(of, davinci_evm_dt_ids);
 168
 169/* davinci evm audio machine driver */
 170static struct snd_soc_card evm_soc_card = {
 171        .owner = THIS_MODULE,
 172        .num_links = 1,
 173};
 174
 175static int davinci_evm_probe(struct platform_device *pdev)
 176{
 177        struct device_node *np = pdev->dev.of_node;
 178        struct snd_soc_dai_link *dai;
 179        struct snd_soc_card_drvdata_davinci *drvdata = NULL;
 180        struct clk *mclk;
 181        int ret = 0;
 182
 183        dai = (struct snd_soc_dai_link *) device_get_match_data(&pdev->dev);
 184        if (!dai) {
 185                dev_err(&pdev->dev, "Error: No device match found\n");
 186                return -ENODEV;
 187        }
 188
 189        evm_soc_card.dai_link = dai;
 190
 191        dai->codecs->of_node = of_parse_phandle(np, "ti,audio-codec", 0);
 192        if (!dai->codecs->of_node)
 193                return -EINVAL;
 194
 195        dai->cpus->of_node = of_parse_phandle(np, "ti,mcasp-controller", 0);
 196        if (!dai->cpus->of_node)
 197                return -EINVAL;
 198
 199        dai->platforms->of_node = dai->cpus->of_node;
 200
 201        evm_soc_card.dev = &pdev->dev;
 202        ret = snd_soc_of_parse_card_name(&evm_soc_card, "ti,model");
 203        if (ret)
 204                return ret;
 205
 206        mclk = devm_clk_get(&pdev->dev, "mclk");
 207        if (PTR_ERR(mclk) == -EPROBE_DEFER) {
 208                return -EPROBE_DEFER;
 209        } else if (IS_ERR(mclk)) {
 210                dev_dbg(&pdev->dev, "mclk not found.\n");
 211                mclk = NULL;
 212        }
 213
 214        drvdata = devm_kzalloc(&pdev->dev, sizeof(*drvdata), GFP_KERNEL);
 215        if (!drvdata)
 216                return -ENOMEM;
 217
 218        drvdata->mclk = mclk;
 219
 220        ret = of_property_read_u32(np, "ti,codec-clock-rate", &drvdata->sysclk);
 221
 222        if (ret < 0) {
 223                if (!drvdata->mclk) {
 224                        dev_err(&pdev->dev,
 225                                "No clock or clock rate defined.\n");
 226                        return -EINVAL;
 227                }
 228                drvdata->sysclk = clk_get_rate(drvdata->mclk);
 229        } else if (drvdata->mclk) {
 230                unsigned int requestd_rate = drvdata->sysclk;
 231                clk_set_rate(drvdata->mclk, drvdata->sysclk);
 232                drvdata->sysclk = clk_get_rate(drvdata->mclk);
 233                if (drvdata->sysclk != requestd_rate)
 234                        dev_warn(&pdev->dev,
 235                                 "Could not get requested rate %u using %u.\n",
 236                                 requestd_rate, drvdata->sysclk);
 237        }
 238
 239        snd_soc_card_set_drvdata(&evm_soc_card, drvdata);
 240        ret = devm_snd_soc_register_card(&pdev->dev, &evm_soc_card);
 241
 242        if (ret)
 243                dev_err(&pdev->dev, "snd_soc_register_card failed (%d)\n", ret);
 244
 245        return ret;
 246}
 247
 248static struct platform_driver davinci_evm_driver = {
 249        .probe          = davinci_evm_probe,
 250        .driver         = {
 251                .name   = "davinci_evm",
 252                .pm     = &snd_soc_pm_ops,
 253                .of_match_table = davinci_evm_dt_ids,
 254        },
 255};
 256
 257module_platform_driver(davinci_evm_driver);
 258
 259MODULE_AUTHOR("Vladimir Barinov");
 260MODULE_DESCRIPTION("TI DAVINCI EVM ASoC driver");
 261MODULE_LICENSE("GPL");
 262