sound/soc/qcom/apq8096.c

   1 // SPDX-License-Identifier: GPL-2.0
   2 // Copyright (c) 2018, Linaro Limited
   3
   4 #include <linux/module.h>
   5 #include <linux/platform_device.h>
   6 #include <linux/of_device.h>
   7 #include <sound/soc.h>
   8 #include <sound/soc-dapm.h>
   9 #include <sound/pcm.h>
  10 #include "common.h"
  11
  12 static int apq8096_be_hw_params_fixup(struct snd_soc_pcm_runtime *rtd,
  13                                       struct snd_pcm_hw_params *params)
  14 {
  15         struct snd_interval *rate = hw_param_interval(params,
  16                                         SNDRV_PCM_HW_PARAM_RATE);
  17         struct snd_interval *channels = hw_param_interval(params,
  18                                         SNDRV_PCM_HW_PARAM_CHANNELS);
  19
  20         rate->min = rate->max = 48000;
  21         channels->min = channels->max = 2;
  22
  23         return 0;
  24 }
  25
  26 static void apq8096_add_be_ops(struct snd_soc_card *card)
  27 {
  28         struct snd_soc_dai_link *link = card->dai_link;
  29         int i, num_links = card->num_links;
  30
  31         for (i = 0; i < num_links; i++) {
  32                 if (link->no_pcm == 1)
  33                         link->be_hw_params_fixup = apq8096_be_hw_params_fixup;
  34                 link++;
  35         }
  36 }
  37
  38 static int apq8096_platform_probe(struct platform_device *pdev)
  39 {
  40         struct snd_soc_card *card;
  41         struct device *dev = &pdev->dev;
  42         int ret;
  43
  44         card = kzalloc(sizeof(*card), GFP_KERNEL);
  45         if (!card)
  46                 return -ENOMEM;
  47
  48         card->dev = dev;
  49         card->owner = THIS_MODULE;
  50         dev_set_drvdata(dev, card);
  51         ret = qcom_snd_parse_of(card);
  52         if (ret) {
  53                 dev_err(dev, "Error parsing OF data\n");
  54                 goto err;
  55         }
  56
  57         apq8096_add_be_ops(card);
  58         ret = snd_soc_register_card(card);
  59         if (ret)
  60                 goto err_card_register;
  61
  62         return 0;
  63
  64 err_card_register:
  65         kfree(card->dai_link);
  66 err:
  67         kfree(card);
  68         return ret;
  69 }
  70
  71 static int apq8096_platform_remove(struct platform_device *pdev)
  72 {
  73         struct snd_soc_card *card = dev_get_drvdata(&pdev->dev);
  74
  75         snd_soc_unregister_card(card);
  76         kfree(card->dai_link);
  77         kfree(card);
  78
  79         return 0;
  80 }
  81
  82 static const struct of_device_id msm_snd_apq8096_dt_match[] = {
  83         {.compatible = "qcom,apq8096-sndcard"},
  84         {}
  85 };
  86
  87 MODULE_DEVICE_TABLE(of, msm_snd_apq8096_dt_match);
  88
  89 static struct platform_driver msm_snd_apq8096_driver = {
  90         .probe  = apq8096_platform_probe,
  91         .remove = apq8096_platform_remove,
  92         .driver = {
  93                 .name = "msm-snd-apq8096",
  94                 .of_match_table = msm_snd_apq8096_dt_match,
  95         },
  96 };
  97 module_platform_driver(msm_snd_apq8096_driver);
  98 MODULE_AUTHOR("Srinivas Kandagatla <srinivas.kandagatla@linaro.org");
  99 MODULE_DESCRIPTION("APQ8096 ASoC Machine Driver");
 100 MODULE_LICENSE("GPL v2");