tjh.dev
Linux kernel mirror (for testing)
git.kernel.org/pub/scm/linux/kernel/git/torvalds/linux.git
kernel
os
linux
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 return sprintf(buf, "%s\n", adev->type);
18}
19
20static ssize_t show_address(struct device *cdev,
21 struct device_attribute *attr, char *buf)
22{
23 char *pos = buf;
24 struct atm_dev *adev = to_atm_dev(cdev);
25 int i;
26
27 for (i = 0; i < (ESI_LEN - 1); i++)
28 pos += sprintf(pos, "%02x:", adev->esi[i]);
29 pos += sprintf(pos, "%02x\n", adev->esi[i]);
30
31 return pos - buf;
32}
33
34static ssize_t show_atmaddress(struct device *cdev,
35 struct device_attribute *attr, char *buf)
36{
37 unsigned long flags;
38 char *pos = buf;
39 struct atm_dev *adev = to_atm_dev(cdev);
40 struct atm_dev_addr *aaddr;
41 int bin[] = { 1, 2, 10, 6, 1 }, *fmt = bin;
42 int i, j;
43
44 spin_lock_irqsave(&adev->lock, flags);
45 list_for_each_entry(aaddr, &adev->local, entry) {
46 for (i = 0, j = 0; i < ATM_ESA_LEN; ++i, ++j) {
47 if (j == *fmt) {
48 pos += sprintf(pos, ".");
49 ++fmt;
50 j = 0;
51 }
52 pos += sprintf(pos, "%02x",
53 aaddr->addr.sas_addr.prv[i]);
54 }
55 pos += sprintf(pos, "\n");
56 }
57 spin_unlock_irqrestore(&adev->lock, flags);
58
59 return pos - buf;
60}
61
62static ssize_t show_atmindex(struct device *cdev,
63 struct device_attribute *attr, char *buf)
64{
65 struct atm_dev *adev = to_atm_dev(cdev);
66
67 return sprintf(buf, "%d\n", adev->number);
68}
69
70static ssize_t show_carrier(struct device *cdev,
71 struct device_attribute *attr, char *buf)
72{
73 char *pos = buf;
74 struct atm_dev *adev = to_atm_dev(cdev);
75
76 pos += sprintf(pos, "%d\n",
77 adev->signal == ATM_PHY_SIG_LOST ? 0 : 1);
78
79 return pos - buf;
80}
81
82static ssize_t show_link_rate(struct device *cdev,
83 struct device_attribute *attr, char *buf)
84{
85 char *pos = buf;
86 struct atm_dev *adev = to_atm_dev(cdev);
87 int link_rate;
88
89 /* show the link rate, not the data rate */
90 switch (adev->link_rate) {
91 case ATM_OC3_PCR:
92 link_rate = 155520000;
93 break;
94 case ATM_OC12_PCR:
95 link_rate = 622080000;
96 break;
97 case ATM_25_PCR:
98 link_rate = 25600000;
99 break;
100 default:
101 link_rate = adev->link_rate * 8 * 53;
102 }
103 pos += sprintf(pos, "%d\n", link_rate);
104
105 return pos - buf;
106}
107
108static DEVICE_ATTR(address, S_IRUGO, show_address, NULL);
109static DEVICE_ATTR(atmaddress, S_IRUGO, show_atmaddress, NULL);
110static DEVICE_ATTR(atmindex, S_IRUGO, show_atmindex, NULL);
111static DEVICE_ATTR(carrier, S_IRUGO, show_carrier, NULL);
112static DEVICE_ATTR(type, S_IRUGO, show_type, NULL);
113static DEVICE_ATTR(link_rate, S_IRUGO, show_link_rate, NULL);
114
115static struct device_attribute *atm_attrs[] = {
116 &dev_attr_atmaddress,
117 &dev_attr_address,
118 &dev_attr_atmindex,
119 &dev_attr_carrier,
120 &dev_attr_type,
121 &dev_attr_link_rate,
122 NULL
123};
124
125
126static int atm_uevent(struct device *cdev, struct kobj_uevent_env *env)
127{
128 struct atm_dev *adev;
129
130 if (!cdev)
131 return -ENODEV;
132
133 adev = to_atm_dev(cdev);
134 if (!adev)
135 return -ENODEV;
136
137 if (add_uevent_var(env, "NAME=%s%d", adev->type, adev->number))
138 return -ENOMEM;
139
140 return 0;
141}
142
143static void atm_release(struct device *cdev)
144{
145 struct atm_dev *adev = to_atm_dev(cdev);
146
147 kfree(adev);
148}
149
150static struct class atm_class = {
151 .name = "atm",
152 .dev_release = atm_release,
153 .dev_uevent = atm_uevent,
154};
155
156int atm_register_sysfs(struct atm_dev *adev, struct device *parent)
157{
158 struct device *cdev = &adev->class_dev;
159 int i, j, err;
160
161 cdev->class = &atm_class;
162 cdev->parent = parent;
163 dev_set_drvdata(cdev, adev);
164
165 dev_set_name(cdev, "%s%d", adev->type, adev->number);
166 err = device_register(cdev);
167 if (err < 0)
168 return err;
169
170 for (i = 0; atm_attrs[i]; i++) {
171 err = device_create_file(cdev, atm_attrs[i]);
172 if (err)
173 goto err_out;
174 }
175
176 return 0;
177
178err_out:
179 for (j = 0; j < i; j++)
180 device_remove_file(cdev, atm_attrs[j]);
181 device_del(cdev);
182 return err;
183}
184
185void atm_unregister_sysfs(struct atm_dev *adev)
186{
187 struct device *cdev = &adev->class_dev;
188
189 device_del(cdev);
190}
191
192int __init atm_sysfs_init(void)
193{
194 return class_register(&atm_class);
195}
196
197void __exit atm_sysfs_exit(void)
198{
199 class_unregister(&atm_class);
200}