1/* ATM driver model support. */
2
3#include <linux/kernel.h>
4#include <linux/slab.h>
5#include <linux/init.h>
6#include <linux/kobject.h>
7#include <linux/atmdev.h>
8#include "common.h"
9#include "resources.h"
10
11#define to_atm_dev(cldev) container_of(cldev, struct atm_dev, class_dev)
12
13static ssize_t show_type(struct device *cdev,
14			 struct device_attribute *attr, char *buf)
15{
16	struct atm_dev *adev = to_atm_dev(cdev);
17
18	return scnprintf(buf, PAGE_SIZE, "%s\n", adev->type);
19}
20
21static ssize_t show_address(struct device *cdev,
22			    struct device_attribute *attr, char *buf)
23{
24	struct atm_dev *adev = to_atm_dev(cdev);
25
26	return scnprintf(buf, PAGE_SIZE, "%pM\n", adev->esi);
27}
28
29static ssize_t show_atmaddress(struct device *cdev,
30			       struct device_attribute *attr, char *buf)
31{
32	unsigned long flags;
33	struct atm_dev *adev = to_atm_dev(cdev);
34	struct atm_dev_addr *aaddr;
35	int bin[] = { 1, 2, 10, 6, 1 }, *fmt = bin;
36	int i, j, count = 0;
37
38	spin_lock_irqsave(&adev->lock, flags);
39	list_for_each_entry(aaddr, &adev->local, entry) {
40		for (i = 0, j = 0; i < ATM_ESA_LEN; ++i, ++j) {
41			if (j == *fmt) {
42				count += scnprintf(buf + count,
43						   PAGE_SIZE - count, ".");
44				++fmt;
45				j = 0;
46			}
47			count += scnprintf(buf + count,
48					   PAGE_SIZE - count, "%02x",
49					   aaddr->addr.sas_addr.prv[i]);
50		}
51		count += scnprintf(buf + count, PAGE_SIZE - count, "\n");
52	}
53	spin_unlock_irqrestore(&adev->lock, flags);
54
55	return count;
56}
57
58static ssize_t show_atmindex(struct device *cdev,
59			     struct device_attribute *attr, char *buf)
60{
61	struct atm_dev *adev = to_atm_dev(cdev);
62
63	return scnprintf(buf, PAGE_SIZE, "%d\n", adev->number);
64}
65
66static ssize_t show_carrier(struct device *cdev,
67			    struct device_attribute *attr, char *buf)
68{
69	struct atm_dev *adev = to_atm_dev(cdev);
70
71	return scnprintf(buf, PAGE_SIZE, "%d\n",
72			 adev->signal == ATM_PHY_SIG_LOST ? 0 : 1);
73}
74
75static ssize_t show_link_rate(struct device *cdev,
76			      struct device_attribute *attr, char *buf)
77{
78	struct atm_dev *adev = to_atm_dev(cdev);
79	int link_rate;
80
81	/* show the link rate, not the data rate */
82	switch (adev->link_rate) {
83	case ATM_OC3_PCR:
84		link_rate = 155520000;
85		break;
86	case ATM_OC12_PCR:
87		link_rate = 622080000;
88		break;
89	case ATM_25_PCR:
90		link_rate = 25600000;
91		break;
92	default:
93		link_rate = adev->link_rate * 8 * 53;
94	}
95	return scnprintf(buf, PAGE_SIZE, "%d\n", link_rate);
96}
97
98static DEVICE_ATTR(address, S_IRUGO, show_address, NULL);
99static DEVICE_ATTR(atmaddress, S_IRUGO, show_atmaddress, NULL);
100static DEVICE_ATTR(atmindex, S_IRUGO, show_atmindex, NULL);
101static DEVICE_ATTR(carrier, S_IRUGO, show_carrier, NULL);
102static DEVICE_ATTR(type, S_IRUGO, show_type, NULL);
103static DEVICE_ATTR(link_rate, S_IRUGO, show_link_rate, NULL);
104
105static struct device_attribute *atm_attrs[] = {
106	&dev_attr_atmaddress,
107	&dev_attr_address,
108	&dev_attr_atmindex,
109	&dev_attr_carrier,
110	&dev_attr_type,
111	&dev_attr_link_rate,
112	NULL
113};
114
115
116static int atm_uevent(struct device *cdev, struct kobj_uevent_env *env)
117{
118	struct atm_dev *adev;
119
120	if (!cdev)
121		return -ENODEV;
122
123	adev = to_atm_dev(cdev);
124	if (!adev)
125		return -ENODEV;
126
127	if (add_uevent_var(env, "NAME=%s%d", adev->type, adev->number))
128		return -ENOMEM;
129
130	return 0;
131}
132
133static void atm_release(struct device *cdev)
134{
135	struct atm_dev *adev = to_atm_dev(cdev);
136
137	kfree(adev);
138}
139
140static struct class atm_class = {
141	.name		= "atm",
142	.dev_release	= atm_release,
143	.dev_uevent		= atm_uevent,
144};
145
146int atm_register_sysfs(struct atm_dev *adev, struct device *parent)
147{
148	struct device *cdev = &adev->class_dev;
149	int i, j, err;
150
151	cdev->class = &atm_class;
152	cdev->parent = parent;
153	dev_set_drvdata(cdev, adev);
154
155	dev_set_name(cdev, "%s%d", adev->type, adev->number);
156	err = device_register(cdev);
157	if (err < 0)
158		return err;
159
160	for (i = 0; atm_attrs[i]; i++) {
161		err = device_create_file(cdev, atm_attrs[i]);
162		if (err)
163			goto err_out;
164	}
165
166	return 0;
167
168err_out:
169	for (j = 0; j < i; j++)
170		device_remove_file(cdev, atm_attrs[j]);
171	device_del(cdev);
172	return err;
173}
174
175void atm_unregister_sysfs(struct atm_dev *adev)
176{
177	struct device *cdev = &adev->class_dev;
178
179	device_del(cdev);
180}
181
182int __init atm_sysfs_init(void)
183{
184	return class_register(&atm_class);
185}
186
187void __exit atm_sysfs_exit(void)
188{
189	class_unregister(&atm_class);
190}
191