linux-imx

/*

 *  Copyright (C) 2005-2007 Jiri Slaby <jirislaby@gmail.com>

 *

 *  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.

 *

 *  You need a userspace library to cooperate with this driver. It (and other

 *  info) may be obtained here:

 *  http://www.fi.muni.cz/~xslaby/phantom.html

 *  or alternatively, you might use OpenHaptics provided by Sensable.

 */

​

#include <linux/compat.h>

#include <linux/kernel.h>

#include <linux/module.h>

#include <linux/device.h>

#include <linux/pci.h>

#include <linux/fs.h>

#include <linux/poll.h>

#include <linux/interrupt.h>

#include <linux/cdev.h>

#include <linux/slab.h>

#include <linux/phantom.h>

#include <linux/sched.h>

#include <linux/mutex.h>

​

#include <linux/atomic.h>

#include <asm/io.h>

​

#define PHANTOM_VERSION     "n0.9.8"

​

#define PHANTOM_MAX_MINORS  8

​

#define PHN_IRQCTL      0x4c    /* irq control in caddr space */

​

#define PHB_RUNNING     1

#define PHB_NOT_OH      2

​

static DEFINE_MUTEX(phantom_mutex);

static struct class *phantom_class;

static int phantom_major;

​

struct phantom_device {

    unsigned int opened;

    void __iomem *caddr;

    u32 __iomem *iaddr;

    u32 __iomem *oaddr;

    unsigned long status;

    atomic_t counter;

​

    wait_queue_head_t wait;

    struct cdev cdev;

​

    struct mutex open_lock;

    spinlock_t regs_lock;

​

    /* used in NOT_OH mode */

    struct phm_regs oregs;

    u32 ctl_reg;

};

​