sound/soc/sof/sof-of-dev.c

   1 // SPDX-License-Identifier: (GPL-2.0-only OR BSD-3-Clause)
   2 //
   3 // Copyright 2019 NXP
   4 //
   5 // Author: Daniel Baluta <daniel.baluta@nxp.com>
   6 //
   7
   8 #include <linux/firmware.h>
   9 #include <linux/module.h>
  10 #include <linux/moduleparam.h>
  11 #include <linux/pm_runtime.h>
  12 #include <sound/sof.h>
  13
  14 #include "sof-of-dev.h"
  15 #include "ops.h"
  16
  17 static char *fw_path;
  18 module_param(fw_path, charp, 0444);
  19 MODULE_PARM_DESC(fw_path, "alternate path for SOF firmware.");
  20
  21 static char *tplg_path;
  22 module_param(tplg_path, charp, 0444);
  23 MODULE_PARM_DESC(tplg_path, "alternate path for SOF topology.");
  24
  25 const struct dev_pm_ops sof_of_pm = {
  26         .prepare = snd_sof_prepare,
  27         .complete = snd_sof_complete,
  28         SET_SYSTEM_SLEEP_PM_OPS(snd_sof_suspend, snd_sof_resume)
  29         SET_RUNTIME_PM_OPS(snd_sof_runtime_suspend, snd_sof_runtime_resume,
  30                            NULL)
  31 };
  32 EXPORT_SYMBOL(sof_of_pm);
  33
  34 static void sof_of_probe_complete(struct device *dev)
  35 {
  36         /* allow runtime_pm */
  37         pm_runtime_set_autosuspend_delay(dev, SND_SOF_SUSPEND_DELAY_MS);
  38         pm_runtime_use_autosuspend(dev);
  39         pm_runtime_mark_last_busy(dev);
  40         pm_runtime_set_active(dev);
  41         pm_runtime_enable(dev);
  42 }
  43
  44 int sof_of_probe(struct platform_device *pdev)
  45 {
  46         struct device *dev = &pdev->dev;
  47         const struct sof_dev_desc *desc;
  48         struct snd_sof_pdata *sof_pdata;
  49
  50         dev_info(&pdev->dev, "DT DSP detected");
  51
  52         sof_pdata = devm_kzalloc(dev, sizeof(*sof_pdata), GFP_KERNEL);
  53         if (!sof_pdata)
  54                 return -ENOMEM;
  55
  56         desc = device_get_match_data(dev);
  57         if (!desc)
  58                 return -ENODEV;
  59
  60         if (!desc->ops) {
  61                 dev_err(dev, "error: no matching DT descriptor ops\n");
  62                 return -ENODEV;
  63         }
  64
  65         sof_pdata->desc = desc;
  66         sof_pdata->dev = &pdev->dev;
  67         sof_pdata->fw_filename = desc->default_fw_filename[SOF_IPC_TYPE_3];
  68
  69         if (fw_path)
  70                 sof_pdata->fw_filename_prefix = fw_path;
  71         else
  72                 sof_pdata->fw_filename_prefix = desc->default_fw_path[SOF_IPC_TYPE_3];
  73
  74         if (tplg_path)
  75                 sof_pdata->tplg_filename_prefix = tplg_path;
  76         else
  77                 sof_pdata->tplg_filename_prefix = desc->default_tplg_path[SOF_IPC_TYPE_3];
  78
  79         /* set callback to be called on successful device probe to enable runtime_pm */
  80         sof_pdata->sof_probe_complete = sof_of_probe_complete;
  81
  82         /* call sof helper for DSP hardware probe */
  83         return snd_sof_device_probe(dev, sof_pdata);
  84 }
  85 EXPORT_SYMBOL(sof_of_probe);
  86
  87 void sof_of_remove(struct platform_device *pdev)
  88 {
  89         pm_runtime_disable(&pdev->dev);
  90
  91         /* call sof helper for DSP hardware remove */
  92         snd_sof_device_remove(&pdev->dev);
  93 }
  94 EXPORT_SYMBOL(sof_of_remove);
  95
  96 void sof_of_shutdown(struct platform_device *pdev)
  97 {
  98         snd_sof_device_shutdown(&pdev->dev);
  99 }
 100 EXPORT_SYMBOL(sof_of_shutdown);
 101
 102 MODULE_LICENSE("Dual BSD/GPL");