LXR linux/drivers/hwtracing/intel

   1// SPDX-License-Identifier: GPL-2.0
   2/*
   3 * Intel(R) Trace Hub ACPI driver
   4 *
   5 * Copyright (C) 2017 Intel Corporation.
   6 */
   7
   8#define pr_fmt(fmt)     KBUILD_MODNAME ": " fmt
   9
  10#include <linux/types.h>
  11#include <linux/module.h>
  12#include <linux/device.h>
  13#include <linux/sysfs.h>
  14#include <linux/platform_device.h>
  15#include <linux/acpi.h>
  16
  17#include "intel_th.h"
  18
  19#define DRIVER_NAME "intel_th_acpi"
  20
  21static const struct intel_th_drvdata intel_th_acpi_pch = {
  22        .host_mode_only = 1,
  23};
  24
  25static const struct intel_th_drvdata intel_th_acpi_uncore = {
  26        .host_mode_only = 1,
  27};
  28
  29static const struct acpi_device_id intel_th_acpi_ids[] = {
  30        { "INTC1000",   (kernel_ulong_t)&intel_th_acpi_uncore },
  31        { "INTC1001",   (kernel_ulong_t)&intel_th_acpi_pch },
  32        { "",           0 },
  33};
  34
  35MODULE_DEVICE_TABLE(acpi, intel_th_acpi_ids);
  36
  37static int intel_th_acpi_probe(struct platform_device *pdev)
  38{
  39        struct acpi_device *adev = ACPI_COMPANION(&pdev->dev);
  40        struct resource resource[TH_MMIO_END];
  41        const struct acpi_device_id *id;
  42        struct intel_th *th;
  43        int i, r;
  44
  45        id = acpi_match_device(intel_th_acpi_ids, &pdev->dev);
  46        if (!id)
  47                return -ENODEV;
  48
  49        for (i = 0, r = 0; i < pdev->num_resources && r < TH_MMIO_END; i++)
  50                if (pdev->resource[i].flags &
  51                    (IORESOURCE_IRQ | IORESOURCE_MEM))
  52                        resource[r++] = pdev->resource[i];
  53
  54        th = intel_th_alloc(&pdev->dev, (void *)id->driver_data, resource, r);
  55        if (IS_ERR(th))
  56                return PTR_ERR(th);
  57
  58        adev->driver_data = th;
  59
  60        return 0;
  61}
  62
  63static int intel_th_acpi_remove(struct platform_device *pdev)
  64{
  65        struct intel_th *th = platform_get_drvdata(pdev);
  66
  67        intel_th_free(th);
  68
  69        return 0;
  70}
  71
  72static struct platform_driver intel_th_acpi_driver = {
  73        .probe          = intel_th_acpi_probe,
  74        .remove         = intel_th_acpi_remove,
  75        .driver         = {
  76                .name                   = DRIVER_NAME,
  77                .acpi_match_table       = intel_th_acpi_ids,
  78        },
  79};
  80
  81module_platform_driver(intel_th_acpi_driver);
  82
  83MODULE_LICENSE("GPL v2");
  84MODULE_DESCRIPTION("Intel(R) Trace Hub ACPI controller driver");
  85MODULE_AUTHOR("Alexander Shishkin <alexander.shishkin@intel.com>");
  86