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
  24 struct snd_soc_card_drvdata_davinci {
  25         struct clk *mclk;
  26         unsigned sysclk;
  27 };
  28
  29 static 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
  42 static 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
  52 static 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
  76 static 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 */
  83 static 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 */
  91 static 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 */
 113 static 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  */
 145 SND_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
 150 static 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_CBM_CFM |
 156                    SND_SOC_DAIFMT_IB_NF,
 157         SND_SOC_DAILINK_REG(evm),
 158 };
 159
 160 static 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 };
 167 MODULE_DEVICE_TABLE(of, davinci_evm_dt_ids);
 168
 169 /* davinci evm audio machine driver */
 170 static struct snd_soc_card evm_soc_card = {
 171         .owner = THIS_MODULE,
 172         .num_links = 1,
 173 };
 174
 175 static 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
 248 static 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
 257 module_platform_driver(davinci_evm_driver);
 258
 259 MODULE_AUTHOR("Vladimir Barinov");
 260 MODULE_DESCRIPTION("TI DAVINCI EVM ASoC driver");
 261 MODULE_LICENSE("GPL");