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-acpi-dev.c (3191B)

      1// SPDX-License-Identifier: (GPL-2.0-only OR BSD-3-Clause)
      2//
      3// This file is provided under a dual BSD/GPLv2 license.  When using or
      4// redistributing this file, you may do so under either license.
      5//
      6// Copyright(c) 2018 Intel Corporation. All rights reserved.
      7//
      8// Author: Liam Girdwood <liam.r.girdwood@linux.intel.com>
      9//
     10
     11#include <linux/acpi.h>
     12#include <linux/firmware.h>
     13#include <linux/module.h>
     14#include <linux/pm_runtime.h>
     15#include <sound/soc-acpi.h>
     16#include <sound/soc-acpi-intel-match.h>
     17#include <sound/sof.h>
     18#include "../intel/common/soc-intel-quirks.h"
     19#include "ops.h"
     20#include "sof-acpi-dev.h"
     21
     22/* platform specific devices */
     23#include "intel/shim.h"
     24
     25static char *fw_path;
     26module_param(fw_path, charp, 0444);
     27MODULE_PARM_DESC(fw_path, "alternate path for SOF firmware.");
     28
     29static char *tplg_path;
     30module_param(tplg_path, charp, 0444);
     31MODULE_PARM_DESC(tplg_path, "alternate path for SOF topology.");
     32
     33static int sof_acpi_debug;
     34module_param_named(sof_acpi_debug, sof_acpi_debug, int, 0444);
     35MODULE_PARM_DESC(sof_acpi_debug, "SOF ACPI debug options (0x0 all off)");
     36
     37#define SOF_ACPI_DISABLE_PM_RUNTIME BIT(0)
     38
     39const struct dev_pm_ops sof_acpi_pm = {
     40	SET_SYSTEM_SLEEP_PM_OPS(snd_sof_suspend, snd_sof_resume)
     41	SET_RUNTIME_PM_OPS(snd_sof_runtime_suspend, snd_sof_runtime_resume,
     42			   snd_sof_runtime_idle)
     43};
     44EXPORT_SYMBOL_NS(sof_acpi_pm, SND_SOC_SOF_ACPI_DEV);
     45
     46static void sof_acpi_probe_complete(struct device *dev)
     47{
     48	dev_dbg(dev, "Completing SOF ACPI probe");
     49
     50	if (sof_acpi_debug & SOF_ACPI_DISABLE_PM_RUNTIME)
     51		return;
     52
     53	/* allow runtime_pm */
     54	pm_runtime_set_autosuspend_delay(dev, SND_SOF_SUSPEND_DELAY_MS);
     55	pm_runtime_use_autosuspend(dev);
     56	pm_runtime_enable(dev);
     57}
     58
     59int sof_acpi_probe(struct platform_device *pdev, const struct sof_dev_desc *desc)
     60{
     61	struct device *dev = &pdev->dev;
     62	struct snd_sof_pdata *sof_pdata;
     63
     64	dev_dbg(dev, "ACPI DSP detected");
     65
     66	sof_pdata = devm_kzalloc(dev, sizeof(*sof_pdata), GFP_KERNEL);
     67	if (!sof_pdata)
     68		return -ENOMEM;
     69
     70	if (!desc->ops) {
     71		dev_err(dev, "error: no matching ACPI descriptor ops\n");
     72		return -ENODEV;
     73	}
     74
     75	sof_pdata->desc = desc;
     76	sof_pdata->dev = &pdev->dev;
     77	sof_pdata->fw_filename = desc->default_fw_filename[SOF_IPC];
     78
     79	/* alternate fw and tplg filenames ? */
     80	if (fw_path)
     81		sof_pdata->fw_filename_prefix = fw_path;
     82	else
     83		sof_pdata->fw_filename_prefix =
     84			sof_pdata->desc->default_fw_path[SOF_IPC];
     85
     86	if (tplg_path)
     87		sof_pdata->tplg_filename_prefix = tplg_path;
     88	else
     89		sof_pdata->tplg_filename_prefix =
     90			sof_pdata->desc->default_tplg_path[SOF_IPC];
     91
     92	/* set callback to be called on successful device probe to enable runtime_pm */
     93	sof_pdata->sof_probe_complete = sof_acpi_probe_complete;
     94
     95	/* call sof helper for DSP hardware probe */
     96	return snd_sof_device_probe(dev, sof_pdata);
     97}
     98EXPORT_SYMBOL_NS(sof_acpi_probe, SND_SOC_SOF_ACPI_DEV);
     99
    100int sof_acpi_remove(struct platform_device *pdev)
    101{
    102	struct device *dev = &pdev->dev;
    103
    104	if (!(sof_acpi_debug & SOF_ACPI_DISABLE_PM_RUNTIME))
    105		pm_runtime_disable(dev);
    106
    107	/* call sof helper for DSP hardware remove */
    108	snd_sof_device_remove(dev);
    109
    110	return 0;
    111}
    112EXPORT_SYMBOL_NS(sof_acpi_remove, SND_SOC_SOF_ACPI_DEV);
    113
    114MODULE_LICENSE("Dual BSD/GPL");