linux-imx

/*

 * adummy.c: a dummy ATM driver

 */

​

#include <linux/module.h>

#include <linux/kernel.h>

#include <linux/skbuff.h>

#include <linux/errno.h>

#include <linux/types.h>

#include <linux/string.h>

#include <linux/delay.h>

#include <linux/init.h>

#include <linux/mm.h>

#include <linux/timer.h>

#include <linux/interrupt.h>

#include <linux/slab.h>

#include <asm/io.h>

#include <asm/byteorder.h>

#include <linux/uaccess.h>

​

#include <linux/atmdev.h>

#include <linux/atm.h>

#include <linux/sonet.h>

​

/* version definition */

​

#define DRV_VERSION "1.0"

​

#define DEV_LABEL "adummy"

​

#define ADUMMY_DEV(dev) ((struct adummy_dev *) (dev)->dev_data)

​

struct adummy_dev {

    struct atm_dev *atm_dev;

​

    struct list_head entry;

};

​

/* globals */

​

static LIST_HEAD(adummy_devs);

​

static ssize_t __set_signal(struct device *dev,

        struct device_attribute *attr,

        const char *buf, size_t len)

{

    struct atm_dev *atm_dev = container_of(dev, struct atm_dev, class_dev);

    int signal;

​

    if (sscanf(buf, "%d", &signal) == 1) {

​

        if (signal < ATM_PHY_SIG_LOST || signal > ATM_PHY_SIG_FOUND)

            signal = ATM_PHY_SIG_UNKNOWN;

​

        atm_dev_signal_change(atm_dev, signal);

        return 1;

    }

    return -EINVAL;

}

​

static ssize_t __show_signal(struct device *dev,

    struct device_attribute *attr, char *buf)

{

    struct atm_dev *atm_dev = container_of(dev, struct atm_dev, class_dev);

    return sprintf(buf, "%d\n", atm_dev->signal);

}

static DEVICE_ATTR(signal, 0644, __show_signal, __set_signal);

​

static struct attribute *adummy_attrs[] = {

    &dev_attr_signal.attr,

    NULL

};

​

static const struct attribute_group adummy_group_attrs = {

    .name = NULL, /* We want them in dev's root folder */

    .attrs = adummy_attrs

};

​

static int __init

adummy_start(struct atm_dev *dev)

{

    dev->ci_range.vpi_bits = 4;

    dev->ci_range.vci_bits = 12;

​

    return 0;

}

​

static int

adummy_open(struct atm_vcc *vcc)

{

    short vpi = vcc->vpi;

    int vci = vcc->vci;