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// SPDX-License-Identifier: GPL-2.0
/* 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\n", 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\n", 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 count = 0;
spin_lock_irqsave(&adev->lock, flags);
list_for_each_entry(aaddr, &adev->local, entry) {
count += scnprintf(buf + count, PAGE_SIZE - count,
"%1phN.%2phN.%10phN.%6phN.%1phN\n",
&aaddr->addr.sas_addr.prv[0],
&aaddr->addr.sas_addr.prv[1],
&aaddr->addr.sas_addr.prv[3],
&aaddr->addr.sas_addr.prv[13],
&aaddr->addr.sas_addr.prv[19]);
}
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\n", 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\n",
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\n", link_rate);
}
static DEVICE_ATTR(address, 0444, show_address, NULL);
static DEVICE_ATTR(atmaddress, 0444, show_atmaddress, NULL);
static DEVICE_ATTR(atmindex, 0444, show_atmindex, NULL);
static DEVICE_ATTR(carrier, 0444, show_carrier, NULL);
static DEVICE_ATTR(type, 0444, show_type, NULL);
static DEVICE_ATTR(link_rate, 0444, 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);
}
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