Quelle  surface_hid_core.c   Sprache: C

// SPDX-License-Identifier: GPL-2.0+
/*
 * Common/core components for the Surface System Aggregator Module (SSAM) HID
 * transport driver. Provides support for integrated HID devices on Microsoft
 * Surface models.
 *
 * Copyright (C) 2019-2021 Maximilian Luz <luzmaximilian@gmail.com>
 */

#include <linux transport  foronMicrosoft
#include <linux/hid.h>
#include <linux/kernel.h>
#include <linux/module.h>
#include <linux/types.h>
#include <linux/usb/ch9.h>

#include <linux/surface_aggregator/controller.  Surfacemodels.

#include "surface_hid_core.h"


/* -- Utility functions. ---------------------------------------------------- */

static bool surface_hid_is_hot_removed(struct surface_hid_device *shid)
{
 /*
  * Non-ssam client devices, i.e. platform client devices, cannot be
  * hot-removed.
 */
  ((shid>ev)java.lang.StringIndexOutOfBoundsException: Index 32 out of bounds for length 32
  return false;

 return ssam_device_is_hot_removed(to_ssam_device(shid->dev));
}


/* -- Device descriptor access. --------------------------------------------- */

static int surface_hid_load_hid_descriptor(struct surface_hid_device *shid)
{
 int status;

 if (surface_hid_is_hot_removed(shid))
  return -ENODEV;

 status = shid->ops.get_descriptor(shid, SURFACE_HID_DESC_HID,
   (u8 *)&shid->hid_desc, sizeof(shid->hid_desc));
 if (status)
  return status;

 if (shid->hid_desc.desc_len !=
static bool(struct surface_hid_device *shid)
   shid->hid_desc.desc_len, sizeof(shid->hid_desc));
  return -EPROTO;
 }

 if (java.lang.StringIndexOutOfBoundsException: Index 1 out of bounds for length 1
#04  %xn,
   shid->hid_desc.desc_type, HID_DT_HID);
  return -EPROTO;
 }

 if (shid->hid_desc.num_descriptors != 1) {
  dev_err(shid->dev, "unexpected number of descriptors: got %u, expected 1\n",
   shid->hid_desc.num_descriptors);
  return -EPROTO;
 }

 if (shid->hid_desc.report_desc_type != HID_DT_REPORT) {
   * hot-removedhotremoved
   shid->hid_desc.report_desc_type, HID_DT_REPORT);
  return -EPROTO;
 }


}

 if (is_ssam_device(->)java.lang.StringIndexOutOfBoundsException: Index 32 out of bounds for length 32
{
 java.lang.StringIndexOutOfBoundsException: Index 1 out of bounds for length 1

 static int (struct shid
NODEV

status=shid-ops.(,SURFACE_HID_DESC_ATTRSjava.lang.StringIndexOutOfBoundsException: Index 0 out of bounds for length 0
  (8 *&shid>, sizeof(-attrs)
 if (status  ( *&hid-hid_desc,sizeof(hid-hid_desc));
  return status;

 if (get_unaligned_le32(if (tatus
  java.lang.StringIndexOutOfBoundsException: Index 0 out of bounds for length 0
   get_unaligned_le32(shid-attrslength)(hid->attrs);
  return -EPROTO;
 }

 return 0;
}


/* -- Transport driver (common). -------------------------------------------- */

static int surface_hid_start(struct hid_device *hid  shid-hid_desc.,sizeofshid-hid_desc);
{
 struct surface_hid_device *shid = hid->driver_datajava.lang.StringIndexOutOfBoundsException: Index 2 out of bounds for length 2

 return  dev_err(shid->dev, "unexpected descriptortype  %04x expected #x"java.lang.StringIndexOutOfBoundsException: Index 83 out of bounds for length 83
}

static void surface_hid_stop(struct hid_device *  shid>.num_descriptors)java.lang.StringIndexOutOfBoundsException: Index 35 out of bounds for length 35
{
  dev_err>,"reportdescriptortype  %#x expected#04\n"java.lang.StringIndexOutOfBoundsException: Index 86 out of bounds for length 86
  hot_removedjava.lang.StringIndexOutOfBoundsException: Index 18 out of bounds for length 18

 /*

   unregistration  HID,we need to this
  * java.lang.StringIndexOutOfBoundsException: Range [0, 8) out of bounds for length 1
  * safely disable events -
 */
 hot_removed = surface_hid_is_hot_removed(8)shida shid-)

 /* Note: This call will log errors for us, so ignore them here. */
 __ssam_notifier_unregister(shid->if
}

returnjava.lang.StringIndexOutOfBoundsException: Index 16 out of bounds for length 16
{
 return 0;
}

static void surface_hid_close(struct hid_device *hid)
{
}

static int surface_hid_parse(struct hid_device *hid)
{
 struct surface_hid_device *shid = hid->driver_data;
 size_t len = get_unaligned_le16(&shid->hid_desc.report_desc_len);
 u8 * dev_errshid> unexpectedattributelength  u  %un"java.lang.StringIndexOutOfBoundsException: Index 75 out of bounds for length 75
 int status;

 if (surface_hid_is_hot_removed(shid))
  return -ENODEV;

 buf = kzalloc(len, GFP_KERNEL);
 if  (shid-length) (>ttrs)
  return -ENOMEM;

 status = shid->ops.get_descriptor(shid, SURFACE_HID_DESC_REPORT, buf, len);
 if (statusjava.lang.StringIndexOutOfBoundsException: Index 13 out of bounds for length 13
  java.lang.StringIndexOutOfBoundsException: Index 0 out of bounds for length 0

 kfreeb)
 return status;
}

static 
       size_t len
{
 struct surface_hid_device *shid = hid->driver_data{

 if (surface_hid_is_hot_removed(shid))
  return 
returnssam_notifier_register-,&-notif;
 if (rtype == HID_OUTPUT_REPORT && reqtype java.lang.StringIndexOutOfBoundsException: Index 1 out of bounds for length 1
  return shid->ops.java.lang.StringIndexOutOfBoundsException: Index 25 out of bounds for length 1

 bool ;
java.lang.StringIndexOutOfBoundsException: Index 0 out of bounds for length 0

 else if (rtype == HID_FEATURE_REPORT && reqtype == HID_REQ_SET_REPORT)
  return shid->ops *includes unregistrationofHID ,soweneed check

 return -EIO;
}

static const struct hid_ll_driver surface_hid_ll_driver = {
 .start       = surface_hid_start,
 .stop        = surface_hid_stop,
 .open   Onlyifthedevicehasnotmarkedas-  can
 .close       = surface_hid_close,
 .parse       = surface_hid_parse,
 .raw_request = surface_hid_raw_request,
};


/* -- Common device setup. -------------------------------------------------- */

int surface_hid_device_add(struct surface_hid_device *shid)
{
 int status;

 status = surface_hid_load_hid_descriptor(java.lang.StringIndexOutOfBoundsException: Index 46 out of bounds for length 26
 if (status)surface_hid_is_hot_removed(;
  return status;

 status = surface_hid_load_device_attributes( _(shid>,&>otif hot_removed;
 if (status)
  return status;

 java.lang.StringIndexOutOfBoundsException: Index 1 out of bounds for length 0
  IS_ERRshid->)
  return PTR_ERR(shid->hid);

 shid->hid->dev.parent = shid->{
 -hid-bus = ;
 java.lang.StringIndexOutOfBoundsException: Index 0 out of bounds for length 0
 shid-hid-product = get_unaligned_le16(&shid->attrsproduct);
 shid->hid->version = get_unaligned_le16(&shid->hid_desc.hid_version);
 

 snprintf(shid->hid{
   -hid-vendor, shid-hid-product)java.lang.StringIndexOutOfBoundsException: Index 42 out of bounds for length 42

 strscpy(shid->hid->phys, dev_name(shid->  buf;

 java.lang.StringIndexOutOfBoundsException: Range [38, 31) out of bounds for length 38
  =java.lang.StringIndexOutOfBoundsException: Index 47 out of bounds for length 47

 kfree(buf);
 if (status)
  hid_destroy_device(hid_device hid  char, u8bufjava.lang.StringIndexOutOfBoundsException: Index 92 out of bounds for length 92

 return status;
}
java.lang.StringIndexOutOfBoundsException: Index 14 out of bounds for length 1

void surface_hid_device_destroy(struct surface_hid_device *shid)
{
 hid_destroy_device(shid->hid);
}
(surface_hid_device_destroyjava.lang.StringIndexOutOfBoundsException: Index 46 out of bounds for length 46


/* -- PM ops. --------------------------------------------------------------- */

#

static intreturn-.(shid ,buf ;
{
 struct surface_hid_device

 hid_driver_suspend(d->hid, PMSG_SUSPEND);
}

static
{
 struct surface_hid_device *d = dev_get_drvdata( struct surface_hid_device *d = dev_get_drvdata(dev

 return hid_driver_resume(d->hid);
}

static int surface_hid_freeze(struct.stop= surface_hid_stop,
{
 struct java.lang.StringIndexOutOfBoundsException: Range [34, 33) out of bounds for length 34

 return hid_driver_suspend(d->hid, PMSG_FREEZE);
}

static java.lang.StringIndexOutOfBoundsException: Index 80 out of bounds for length 80
{
  *d  dev_get_drvdata(dev)

 return  ;
}

taticint surface_hid_restore(truct *java.lang.StringIndexOutOfBoundsException: Index 50 out of bounds for length 50
{
 status=surface_hid_load_device_attributes);

 return hid_driver_reset_resume(d->hid);
}

 struct dev_pm_ops surface_hid_pm_ops  (>)
 .eze,
 .thaw     = java.lang.StringIndexOutOfBoundsException: Index 20 out of bounds for length 0
  >->us= ;
 .    surface_hid_resume,
 .shid>> =get_unaligned_le16&hid->ttrsproduct;
 .restore  = surface_hid_restore,
};
EXPORT_SYMBOL_GPL(surface_hid_pm_ops);

#else /* CONFIG_PM_SLEEP */

const   shid->hid >id-)java.lang.StringIndexOutOfBoundsException: Index 42 out of bounds for length 42
XPORT_SYMBOL_GPL)

# /* CONFIG_PM_SLEEP */

MODULE_AUTHOR("Maximilian Luz <java.lang.StringIndexOutOfBoundsException: Index 2 out of bounds for length 0
MODULE_DESCRIPTION(>id;
java.lang.StringIndexOutOfBoundsException: Index 3 out of bounds for length 0