xref: /openbmc/linux/net/atm/atm_sysfs.c (revision e868d61272caa648214046a096e5a6bfc068dc8c)
1 /* ATM driver model support. */
2 
3 #include <linux/kernel.h>
4 #include <linux/init.h>
5 #include <linux/kobject.h>
6 #include <linux/atmdev.h>
7 #include "common.h"
8 #include "resources.h"
9 
10 #define to_atm_dev(cldev) container_of(cldev, struct atm_dev, class_dev)
11 
12 static ssize_t show_type(struct class_device *cdev, char *buf)
13 {
14 	struct atm_dev *adev = to_atm_dev(cdev);
15 	return sprintf(buf, "%s\n", adev->type);
16 }
17 
18 static ssize_t show_address(struct class_device *cdev, char *buf)
19 {
20 	char *pos = buf;
21 	struct atm_dev *adev = to_atm_dev(cdev);
22 	int i;
23 
24 	for (i = 0; i < (ESI_LEN - 1); i++)
25 		pos += sprintf(pos, "%02x:", adev->esi[i]);
26 	pos += sprintf(pos, "%02x\n", adev->esi[i]);
27 
28 	return pos - buf;
29 }
30 
31 static ssize_t show_atmaddress(struct class_device *cdev, char *buf)
32 {
33 	unsigned long flags;
34 	char *pos = buf;
35 	struct atm_dev *adev = to_atm_dev(cdev);
36 	struct atm_dev_addr *aaddr;
37 	int bin[] = { 1, 2, 10, 6, 1 }, *fmt = bin;
38 	int i, j;
39 
40 	spin_lock_irqsave(&adev->lock, flags);
41 	list_for_each_entry(aaddr, &adev->local, entry) {
42 		for(i = 0, j = 0; i < ATM_ESA_LEN; ++i, ++j) {
43 			if (j == *fmt) {
44 				pos += sprintf(pos, ".");
45 				++fmt;
46 				j = 0;
47 			}
48 			pos += sprintf(pos, "%02x", aaddr->addr.sas_addr.prv[i]);
49 		}
50 		pos += sprintf(pos, "\n");
51 	}
52 	spin_unlock_irqrestore(&adev->lock, flags);
53 
54 	return pos - buf;
55 }
56 
57 static ssize_t show_carrier(struct class_device *cdev, char *buf)
58 {
59 	char *pos = buf;
60 	struct atm_dev *adev = to_atm_dev(cdev);
61 
62 	pos += sprintf(pos, "%d\n",
63 		       adev->signal == ATM_PHY_SIG_LOST ? 0 : 1);
64 
65 	return pos - buf;
66 }
67 
68 static ssize_t show_link_rate(struct class_device *cdev, char *buf)
69 {
70 	char *pos = buf;
71 	struct atm_dev *adev = to_atm_dev(cdev);
72 	int link_rate;
73 
74 	/* show the link rate, not the data rate */
75 	switch (adev->link_rate) {
76 		case ATM_OC3_PCR:
77 			link_rate = 155520000;
78 			break;
79 		case ATM_OC12_PCR:
80 			link_rate = 622080000;
81 			break;
82 		case ATM_25_PCR:
83 			link_rate = 25600000;
84 			break;
85 		default:
86 			link_rate = adev->link_rate * 8 * 53;
87 	}
88 	pos += sprintf(pos, "%d\n", link_rate);
89 
90 	return pos - buf;
91 }
92 
93 static CLASS_DEVICE_ATTR(address, S_IRUGO, show_address, NULL);
94 static CLASS_DEVICE_ATTR(atmaddress, S_IRUGO, show_atmaddress, NULL);
95 static CLASS_DEVICE_ATTR(carrier, S_IRUGO, show_carrier, NULL);
96 static CLASS_DEVICE_ATTR(type, S_IRUGO, show_type, NULL);
97 static CLASS_DEVICE_ATTR(link_rate, S_IRUGO, show_link_rate, NULL);
98 
99 static struct class_device_attribute *atm_attrs[] = {
100 	&class_device_attr_atmaddress,
101 	&class_device_attr_address,
102 	&class_device_attr_carrier,
103 	&class_device_attr_type,
104 	&class_device_attr_link_rate,
105 	NULL
106 };
107 
108 static int atm_uevent(struct class_device *cdev, char **envp, int num_envp, char *buf, int size)
109 {
110 	struct atm_dev *adev;
111 	int i = 0, len = 0;
112 
113 	if (!cdev)
114 		return -ENODEV;
115 
116 	adev = to_atm_dev(cdev);
117 	if (!adev)
118 		return -ENODEV;
119 
120 	if (add_uevent_var(envp, num_envp, &i, buf, size, &len,
121 			   "NAME=%s%d", adev->type, adev->number))
122 		return -ENOMEM;
123 
124 	envp[i] = NULL;
125 	return 0;
126 }
127 
128 static void atm_release(struct class_device *cdev)
129 {
130 	struct atm_dev *adev = to_atm_dev(cdev);
131 
132 	kfree(adev);
133 }
134 
135 static struct class atm_class = {
136 	.name		= "atm",
137 	.release	= atm_release,
138 	.uevent		= atm_uevent,
139 };
140 
141 int atm_register_sysfs(struct atm_dev *adev)
142 {
143 	struct class_device *cdev = &adev->class_dev;
144 	int i, j, err;
145 
146 	cdev->class = &atm_class;
147 	class_set_devdata(cdev, adev);
148 
149 	snprintf(cdev->class_id, BUS_ID_SIZE, "%s%d", adev->type, adev->number);
150 	err = class_device_register(cdev);
151 	if (err < 0)
152 		return err;
153 
154 	for (i = 0; atm_attrs[i]; i++) {
155 		err = class_device_create_file(cdev, atm_attrs[i]);
156 		if (err)
157 			goto err_out;
158 	}
159 
160 	return 0;
161 
162 err_out:
163 	for (j = 0; j < i; j++)
164 		class_device_remove_file(cdev, atm_attrs[j]);
165 	class_device_del(cdev);
166 	return err;
167 }
168 
169 void atm_unregister_sysfs(struct atm_dev *adev)
170 {
171 	struct class_device *cdev = &adev->class_dev;
172 
173 	class_device_del(cdev);
174 }
175 
176 int __init atm_sysfs_init(void)
177 {
178 	return class_register(&atm_class);
179 }
180 
181 void __exit atm_sysfs_exit(void)
182 {
183 	class_unregister(&atm_class);
184 }
185