2 * adummy.c: a dummy ATM driver
5 #include <linux/module.h>
6 #include <linux/kernel.h>
7 #include <linux/skbuff.h>
8 #include <linux/errno.h>
9 #include <linux/types.h>
10 #include <linux/string.h>
11 #include <linux/delay.h>
12 #include <linux/init.h>
14 #include <linux/timer.h>
15 #include <linux/interrupt.h>
16 #include <linux/slab.h>
18 #include <asm/byteorder.h>
19 #include <asm/uaccess.h>
21 #include <linux/atmdev.h>
22 #include <linux/atm.h>
23 #include <linux/sonet.h>
25 /* version definition */
27 #define DRV_VERSION "1.0"
29 #define DEV_LABEL "adummy"
31 #define ADUMMY_DEV(dev) ((struct adummy_dev *) (dev)->dev_data)
34 struct atm_dev *atm_dev;
36 struct list_head entry;
41 static LIST_HEAD(adummy_devs);
43 static ssize_t __set_signal(struct device *dev,
44 struct device_attribute *attr,
45 const char *buf, size_t len)
47 struct atm_dev *atm_dev = container_of(dev, struct atm_dev, class_dev);
50 if (sscanf(buf, "%d", &signal) == 1) {
52 if (signal < ATM_PHY_SIG_LOST || signal > ATM_PHY_SIG_FOUND)
53 signal = ATM_PHY_SIG_UNKNOWN;
55 atm_dev_signal_change(atm_dev, signal);
61 static ssize_t __show_signal(struct device *dev,
62 struct device_attribute *attr, char *buf)
64 struct atm_dev *atm_dev = container_of(dev, struct atm_dev, class_dev);
65 return sprintf(buf, "%d\n", atm_dev->signal);
67 static DEVICE_ATTR(signal, 0644, __show_signal, __set_signal);
69 static struct attribute *adummy_attrs[] = {
70 &dev_attr_signal.attr,
74 static struct attribute_group adummy_group_attrs = {
75 .name = NULL, /* We want them in dev's root folder */
80 adummy_start(struct atm_dev *dev)
82 dev->ci_range.vpi_bits = 4;
83 dev->ci_range.vci_bits = 12;
89 adummy_open(struct atm_vcc *vcc)
94 if (vci == ATM_VCI_UNSPEC || vpi == ATM_VPI_UNSPEC)
97 set_bit(ATM_VF_ADDR, &vcc->flags);
98 set_bit(ATM_VF_READY, &vcc->flags);
104 adummy_close(struct atm_vcc *vcc)
106 clear_bit(ATM_VF_READY, &vcc->flags);
107 clear_bit(ATM_VF_ADDR, &vcc->flags);
111 adummy_send(struct atm_vcc *vcc, struct sk_buff *skb)
116 dev_kfree_skb_any(skb);
117 atomic_inc(&vcc->stats->tx);
123 adummy_proc_read(struct atm_dev *dev, loff_t *pos, char *page)
128 return sprintf(page, "version %s\n", DRV_VERSION);
133 static struct atmdev_ops adummy_ops =
136 .close = adummy_close,
138 .proc_read = adummy_proc_read,
142 static int __init adummy_init(void)
144 struct atm_dev *atm_dev;
145 struct adummy_dev *adummy_dev;
148 printk(KERN_ERR "adummy: version %s\n", DRV_VERSION);
150 adummy_dev = kzalloc(sizeof(struct adummy_dev),
153 printk(KERN_ERR DEV_LABEL ": kzalloc() failed\n");
157 atm_dev = atm_dev_register(DEV_LABEL, NULL, &adummy_ops, -1, NULL);
159 printk(KERN_ERR DEV_LABEL ": atm_dev_register() failed\n");
164 adummy_dev->atm_dev = atm_dev;
165 atm_dev->dev_data = adummy_dev;
167 if (sysfs_create_group(&atm_dev->class_dev.kobj, &adummy_group_attrs))
168 dev_err(&atm_dev->class_dev, "Could not register attrs for adummy\n");
170 if (adummy_start(atm_dev)) {
171 printk(KERN_ERR DEV_LABEL ": adummy_start() failed\n");
176 list_add(&adummy_dev->entry, &adummy_devs);
181 atm_dev_deregister(atm_dev);
187 static void __exit adummy_cleanup(void)
189 struct adummy_dev *adummy_dev, *next;
191 list_for_each_entry_safe(adummy_dev, next, &adummy_devs, entry) {
192 atm_dev_deregister(adummy_dev->atm_dev);
197 module_init(adummy_init);
198 module_exit(adummy_cleanup);
200 MODULE_AUTHOR("chas williams <chas@cmf.nrl.navy.mil>");
201 MODULE_DESCRIPTION("dummy ATM driver");
202 MODULE_LICENSE("GPL");