text: // SPDX-License-Identifier: (GPL-2.0-only OR BSD-3-Clause)
  //
  // Copyright 2019 NXP
  //
  // Author: Daniel Baluta <daniel.baluta@nxp.com>
  //
  
  #include <linux/firmware.h>
  #include <linux/module.h>
  #include <linux/pm_runtime.h>
  #include <sound/sof.h>
  
  #include "ops.h"
  
  extern struct snd_sof_dsp_ops sof_imx8_ops;
  extern struct snd_sof_dsp_ops sof_imx8x_ops;
  extern struct snd_sof_dsp_ops sof_imx8m_ops;
  
  /* platform specific devices */
  #if IS_ENABLED(CONFIG_SND_SOC_SOF_IMX8)
  static struct sof_dev_desc sof_of_imx8qxp_desc = {
  	.default_fw_path = "imx/sof",
  	.default_tplg_path = "imx/sof-tplg",
  	.default_fw_filename = "sof-imx8x.ri",
  	.nocodec_tplg_filename = "sof-imx8-nocodec.tplg",
  	.ops = &sof_imx8x_ops,
  };
  
  static struct sof_dev_desc sof_of_imx8qm_desc = {
  	.default_fw_path = "imx/sof",
  	.default_tplg_path = "imx/sof-tplg",
  	.default_fw_filename = "sof-imx8.ri",
  	.nocodec_tplg_filename = "sof-imx8-nocodec.tplg",
  	.ops = &sof_imx8_ops,
  };
  #endif
  
  #if IS_ENABLED(CONFIG_SND_SOC_SOF_IMX8M)
  static struct sof_dev_desc sof_of_imx8mp_desc = {
  	.default_fw_path = "imx/sof",
  	.default_tplg_path = "imx/sof-tplg",
  	.default_fw_filename = "sof-imx8m.ri",
  	.nocodec_tplg_filename = "sof-imx8-nocodec.tplg",
  	.ops = &sof_imx8m_ops,
  };
  #endif
  
  static const struct dev_pm_ops sof_of_pm = {
  	.prepare = snd_sof_prepare,
  	.complete = snd_sof_complete,
  	SET_SYSTEM_SLEEP_PM_OPS(snd_sof_suspend, snd_sof_resume)
  	SET_RUNTIME_PM_OPS(snd_sof_runtime_suspend, snd_sof_runtime_resume,
  			   NULL)
  };
  
  static void sof_of_probe_complete(struct device *dev)
  {
  	/* allow runtime_pm */
  	pm_runtime_set_autosuspend_delay(dev, SND_SOF_SUSPEND_DELAY_MS);
  	pm_runtime_use_autosuspend(dev);
  	pm_runtime_set_active(dev);
  	pm_runtime_enable(dev);
  
  	pm_runtime_mark_last_busy(dev);
  	pm_runtime_put_autosuspend(dev);
  }
  
  static int sof_of_probe(struct platform_device *pdev)
  {
  	struct device *dev = &pdev->dev;
  	const struct sof_dev_desc *desc;
  	struct snd_sof_pdata *sof_pdata;
  
  	dev_info(&pdev->dev, "DT DSP detected");
  
  	sof_pdata = devm_kzalloc(dev, sizeof(*sof_pdata), GFP_KERNEL);
  	if (!sof_pdata)
  		return -ENOMEM;
  
  	desc = device_get_match_data(dev);
  	if (!desc)
  		return -ENODEV;
  
  	if (!desc->ops) {
  		dev_err(dev, "error: no matching DT descriptor ops\n");
  		return -ENODEV;
  	}
  
  	sof_pdata->desc = desc;
  	sof_pdata->dev = &pdev->dev;
  	sof_pdata->fw_filename = desc->default_fw_filename;
  
  	/* TODO: read alternate fw and tplg filenames from DT */
  	sof_pdata->fw_filename_prefix = sof_pdata->desc->default_fw_path;
  	sof_pdata->tplg_filename_prefix = sof_pdata->desc->default_tplg_path;
  
  	/* set callback to be called on successful device probe to enable runtime_pm */
  	sof_pdata->sof_probe_complete = sof_of_probe_complete;
  
  	/* call sof helper for DSP hardware probe */
  	return snd_sof_device_probe(dev, sof_pdata);
  }
  
  static int sof_of_remove(struct platform_device *pdev)
  {
  	pm_runtime_disable(&pdev->dev);
  
  	/* call sof helper for DSP hardware remove */
  	snd_sof_device_remove(&pdev->dev);
  
  	return 0;
  }
  
  static const struct of_device_id sof_of_ids[] = {
  #if IS_ENABLED(CONFIG_SND_SOC_SOF_IMX8)
  	{ .compatible = "fsl,imx8qxp-dsp", .data = &sof_of_imx8qxp_desc},
  	{ .compatible = "fsl,imx8qm-dsp", .data = &sof_of_imx8qm_desc},
  #endif
  #if IS_ENABLED(CONFIG_SND_SOC_SOF_IMX8M)
  	{ .compatible = "fsl,imx8mp-dsp", .data = &sof_of_imx8mp_desc},
  #endif
  	{ }
  };
  MODULE_DEVICE_TABLE(of, sof_of_ids);
  
  /* DT driver definition */
  static struct platform_driver snd_sof_of_driver = {
  	.probe = sof_of_probe,
  	.remove = sof_of_remove,
  	.driver = {
  		.name = "sof-audio-of",
  		.pm = &sof_of_pm,
  		.of_match_table = sof_of_ids,
  	},
  };
  module_platform_driver(snd_sof_of_driver);
  
  MODULE_LICENSE("Dual BSD/GPL");
  