/* ATM driver model support. */

  #include <linux/kernel.h>

  #include <linux/slab.h>

  #include <linux/init.h>
  #include <linux/kobject.h>
  #include <linux/atmdev.h>
  #include "common.h"
  #include "resources.h"
  
  #define to_atm_dev(cldev) container_of(cldev, struct atm_dev, class_dev)

  static ssize_t show_type(struct device *cdev,
  			 struct device_attribute *attr, char *buf)

  {
  	struct atm_dev *adev = to_atm_dev(cdev);

  
  	return scnprintf(buf, PAGE_SIZE, "%s
  ", adev->type);

  }

  static ssize_t show_address(struct device *cdev,
  			    struct device_attribute *attr, char *buf)

  {

  	struct atm_dev *adev = to_atm_dev(cdev);

  	return scnprintf(buf, PAGE_SIZE, "%pM
  ", adev->esi);

  }

  static ssize_t show_atmaddress(struct device *cdev,
  			       struct device_attribute *attr, char *buf)

  {

  	unsigned long flags;

  	struct atm_dev *adev = to_atm_dev(cdev);

  	struct atm_dev_addr *aaddr;

  	int bin[] = { 1, 2, 10, 6, 1 }, *fmt = bin;

  	int i, j, count = 0;

  	spin_lock_irqsave(&adev->lock, flags);
  	list_for_each_entry(aaddr, &adev->local, entry) {

  		for (i = 0, j = 0; i < ATM_ESA_LEN; ++i, ++j) {

  			if (j == *fmt) {

  				count += scnprintf(buf + count,
  						   PAGE_SIZE - count, ".");

  				++fmt;
  				j = 0;
  			}

  			count += scnprintf(buf + count,
  					   PAGE_SIZE - count, "%02x",
  					   aaddr->addr.sas_addr.prv[i]);

  		}

  		count += scnprintf(buf + count, PAGE_SIZE - count, "
  ");

  	}

  	spin_unlock_irqrestore(&adev->lock, flags);

  	return count;

  }

  static ssize_t show_atmindex(struct device *cdev,
  			     struct device_attribute *attr, char *buf)
  {
  	struct atm_dev *adev = to_atm_dev(cdev);

  	return scnprintf(buf, PAGE_SIZE, "%d
  ", adev->number);

  }

  static ssize_t show_carrier(struct device *cdev,
  			    struct device_attribute *attr, char *buf)

  {

  	struct atm_dev *adev = to_atm_dev(cdev);

  	return scnprintf(buf, PAGE_SIZE, "%d
  ",
  			 adev->signal == ATM_PHY_SIG_LOST ? 0 : 1);

  }

  static ssize_t show_link_rate(struct device *cdev,
  			      struct device_attribute *attr, char *buf)

  {

  	struct atm_dev *adev = to_atm_dev(cdev);
  	int link_rate;
  
  	/* show the link rate, not the data rate */
  	switch (adev->link_rate) {

  	case ATM_OC3_PCR:
  		link_rate = 155520000;
  		break;
  	case ATM_OC12_PCR:
  		link_rate = 622080000;
  		break;
  	case ATM_25_PCR:
  		link_rate = 25600000;
  		break;
  	default:
  		link_rate = adev->link_rate * 8 * 53;

  	}

  	return scnprintf(buf, PAGE_SIZE, "%d
  ", link_rate);

  }

  static DEVICE_ATTR(address, S_IRUGO, show_address, NULL);
  static DEVICE_ATTR(atmaddress, S_IRUGO, show_atmaddress, NULL);

  static DEVICE_ATTR(atmindex, S_IRUGO, show_atmindex, NULL);

  static DEVICE_ATTR(carrier, S_IRUGO, show_carrier, NULL);
  static DEVICE_ATTR(type, S_IRUGO, show_type, NULL);
  static DEVICE_ATTR(link_rate, S_IRUGO, show_link_rate, NULL);
  
  static struct device_attribute *atm_attrs[] = {
  	&dev_attr_atmaddress,
  	&dev_attr_address,

  	&dev_attr_atmindex,

  	&dev_attr_carrier,
  	&dev_attr_type,
  	&dev_attr_link_rate,

  	NULL
  };

  
  static int atm_uevent(struct device *cdev, struct kobj_uevent_env *env)

  {
  	struct atm_dev *adev;

  
  	if (!cdev)
  		return -ENODEV;
  
  	adev = to_atm_dev(cdev);
  	if (!adev)
  		return -ENODEV;

  	if (add_uevent_var(env, "NAME=%s%d", adev->type, adev->number))

  		return -ENOMEM;

  	return 0;
  }

  static void atm_release(struct device *cdev)

  {
  	struct atm_dev *adev = to_atm_dev(cdev);
  
  	kfree(adev);
  }
  
  static struct class atm_class = {
  	.name		= "atm",

  	.dev_release	= atm_release,
  	.dev_uevent		= atm_uevent,

  };

  int atm_register_sysfs(struct atm_dev *adev, struct device *parent)

  {

  	struct device *cdev = &adev->class_dev;

  	int i, j, err;

  
  	cdev->class = &atm_class;

  	cdev->parent = parent;

  	dev_set_drvdata(cdev, adev);

  	dev_set_name(cdev, "%s%d", adev->type, adev->number);

  	err = device_register(cdev);

  	if (err < 0)
  		return err;

  	for (i = 0; atm_attrs[i]; i++) {

  		err = device_create_file(cdev, atm_attrs[i]);

  		if (err)
  			goto err_out;
  	}

  
  	return 0;

  
  err_out:
  	for (j = 0; j < i; j++)

  		device_remove_file(cdev, atm_attrs[j]);
  	device_del(cdev);

  	return err;

  }
  
  void atm_unregister_sysfs(struct atm_dev *adev)
  {

  	struct device *cdev = &adev->class_dev;

  	device_del(cdev);

  }
  
  int __init atm_sysfs_init(void)
  {
  	return class_register(&atm_class);
  }
  
  void __exit atm_sysfs_exit(void)
  {
  	class_unregister(&atm_class);
  }