cachepc-linux

Fork of AMDESE/linux with modifications for CachePC side-channel attack
git clone https://git.sinitax.com/sinitax/cachepc-linux
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sof-of-dev.c (2611B)

      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
     17static char *fw_path;
     18module_param(fw_path, charp, 0444);
     19MODULE_PARM_DESC(fw_path, "alternate path for SOF firmware.");
     20
     21static char *tplg_path;
     22module_param(tplg_path, charp, 0444);
     23MODULE_PARM_DESC(tplg_path, "alternate path for SOF topology.");
     24
     25const 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};
     32EXPORT_SYMBOL(sof_of_pm);
     33
     34static 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
     44int 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];
     68
     69	if (fw_path)
     70		sof_pdata->fw_filename_prefix = fw_path;
     71	else
     72		sof_pdata->fw_filename_prefix = sof_pdata->desc->default_fw_path[SOF_IPC];
     73
     74	if (tplg_path)
     75		sof_pdata->tplg_filename_prefix = tplg_path;
     76	else
     77		sof_pdata->tplg_filename_prefix = sof_pdata->desc->default_tplg_path[SOF_IPC];
     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}
     85EXPORT_SYMBOL(sof_of_probe);
     86
     87int 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	return 0;
     95}
     96EXPORT_SYMBOL(sof_of_remove);
     97
     98void sof_of_shutdown(struct platform_device *pdev)
     99{
    100	snd_sof_device_shutdown(&pdev->dev);
    101}
    102EXPORT_SYMBOL(sof_of_shutdown);
    103
    104MODULE_LICENSE("Dual BSD/GPL");