d_usbhost.c

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/*
 * LEGO® MINDSTORMS EV3
 *
 * Copyright (C) 2010-2013 The LEGO Group
 *
 * This program is free software; you can redistribute it and/or modify
 * it under the terms of the GNU General Public License as published by
 * the Free Software Foundation; either version 2 of the License, or
 * (at your option) any later version.
 *
 * This program is distributed in the hope that it will be useful,
 * but WITHOUT ANY WARRANTY; without even the implied warranty of
 * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
 * GNU General Public License for more details.
 *
 * You should have received a copy of the GNU General Public License
 * along with this program; if not, write to the Free Software
 * Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA  02110-1301, USA.
 */


#ifndef PCASM
#include  <asm/types.h>
#endif

#include  "../../lms2012/source/lms2012.h"
#include  "../../lms2012/source/am1808.h"


#define   MODULE_NAME                   "usbhost_module"
#define   DEVICE1_NAME                  USBHOST_DEVICE

static    int  ModuleInit(void);
static    void ModuleExit(void);

#define   __USE_POSIX

#include  <linux/kernel.h>
#include  <linux/fs.h>

#include  <linux/sched.h>


#ifndef   PCASM
#include  <linux/hrtimer.h>

#include  <linux/mm.h>
#include  <linux/hrtimer.h>

#include  <linux/init.h>
#include  <linux/uaccess.h>
#include  <linux/debugfs.h>

#include  <linux/ioport.h>
#include  <asm/gpio.h>
#include  <asm/io.h>
#include  <linux/module.h>
#include  <linux/miscdevice.h>
#include  <asm/uaccess.h>

MODULE_LICENSE("GPL");
MODULE_AUTHOR("The LEGO Group");
MODULE_DESCRIPTION(MODULE_NAME);
MODULE_SUPPORTED_DEVICE(DEVICE1_NAME);

module_init(ModuleInit);
module_exit(ModuleExit);

#else
// Keep Eclipse happy
#endif


// DEVICE1 ********************************************************************


static ssize_t Device1Write(struct file *File,const char *Buffer,size_t Count,loff_t *Data)
{
  int     Lng     = 0;

  Lng           =  Count;

  return (Lng);
}


static ssize_t Device1Read(struct file *File,char *Buffer,size_t Count,loff_t *Offset)
{
  int     Lng     = 0;

  Lng  =  snprintf(Buffer,Count,"%s\r",DEVICE1_NAME);

  return (Lng);
}


static    const struct file_operations Device1Entries =
{
  .owner        = THIS_MODULE,
  .read         = Device1Read,
  .write        = Device1Write
};


static    struct miscdevice Device1 =
{
  MISC_DYNAMIC_MINOR,
  DEVICE1_NAME,
  &Device1Entries
};


static int Device1Init(void)
{
  int     Result = -1;

  Result  =  misc_register(&Device1);
  if (Result)
  {
    printk("  %s device register failed\n",DEVICE1_NAME);
  }
  else
  {
#ifdef DEBUG
    printk("  %s device register succes\n",DEVICE1_NAME);
#endif
  }

  return (Result);
}


static void Device1Exit(void)
{
  misc_deregister(&Device1);
#ifdef DEBUG
  printk("  %s device unregistered\n",DEVICE1_NAME);
#endif
}


// MODULE *********************************************************************


static int ModuleInit(void)
{
#ifdef DEBUG
  printk("%s init started\n",MODULE_NAME);
#endif

  Device1Init();

  return (0);
}


static void ModuleExit(void)
{
#ifdef DEBUG
  printk("%s exit started\n",MODULE_NAME);
#endif

  Device1Exit();

}