cmd64x: don't clear the other channel's interrupt
[linux-2.6/linux-mips/linux-dm7025.git] / drivers / net / wan / hdlc_raw.c
blobe23bc6656267401270488809d0a73d886203adb8
1 /*
2 * Generic HDLC support routines for Linux
3 * HDLC support
5 * Copyright (C) 1999 - 2006 Krzysztof Halasa <khc@pm.waw.pl>
7 * This program is free software; you can redistribute it and/or modify it
8 * under the terms of version 2 of the GNU General Public License
9 * as published by the Free Software Foundation.
12 #include <linux/module.h>
13 #include <linux/kernel.h>
14 #include <linux/slab.h>
15 #include <linux/poll.h>
16 #include <linux/errno.h>
17 #include <linux/if_arp.h>
18 #include <linux/init.h>
19 #include <linux/skbuff.h>
20 #include <linux/pkt_sched.h>
21 #include <linux/inetdevice.h>
22 #include <linux/lapb.h>
23 #include <linux/rtnetlink.h>
24 #include <linux/hdlc.h>
27 static int raw_ioctl(struct net_device *dev, struct ifreq *ifr);
29 static __be16 raw_type_trans(struct sk_buff *skb, struct net_device *dev)
31 return __constant_htons(ETH_P_IP);
36 static struct hdlc_proto proto = {
37 .type_trans = raw_type_trans,
38 .ioctl = raw_ioctl,
39 .module = THIS_MODULE,
43 static int raw_ioctl(struct net_device *dev, struct ifreq *ifr)
45 raw_hdlc_proto __user *raw_s = ifr->ifr_settings.ifs_ifsu.raw_hdlc;
46 const size_t size = sizeof(raw_hdlc_proto);
47 raw_hdlc_proto new_settings;
48 hdlc_device *hdlc = dev_to_hdlc(dev);
49 int result;
51 switch (ifr->ifr_settings.type) {
52 case IF_GET_PROTO:
53 if (dev_to_hdlc(dev)->proto != &proto)
54 return -EINVAL;
55 ifr->ifr_settings.type = IF_PROTO_HDLC;
56 if (ifr->ifr_settings.size < size) {
57 ifr->ifr_settings.size = size; /* data size wanted */
58 return -ENOBUFS;
60 if (copy_to_user(raw_s, hdlc->state, size))
61 return -EFAULT;
62 return 0;
64 case IF_PROTO_HDLC:
65 if (!capable(CAP_NET_ADMIN))
66 return -EPERM;
68 if (dev->flags & IFF_UP)
69 return -EBUSY;
71 if (copy_from_user(&new_settings, raw_s, size))
72 return -EFAULT;
74 if (new_settings.encoding == ENCODING_DEFAULT)
75 new_settings.encoding = ENCODING_NRZ;
77 if (new_settings.parity == PARITY_DEFAULT)
78 new_settings.parity = PARITY_CRC16_PR1_CCITT;
80 result = hdlc->attach(dev, new_settings.encoding,
81 new_settings.parity);
82 if (result)
83 return result;
85 result = attach_hdlc_protocol(dev, &proto, NULL,
86 sizeof(raw_hdlc_proto));
87 if (result)
88 return result;
89 memcpy(hdlc->state, &new_settings, size);
90 dev->hard_start_xmit = hdlc->xmit;
91 dev->type = ARPHRD_RAWHDLC;
92 netif_dormant_off(dev);
93 return 0;
96 return -EINVAL;
100 static int __init mod_init(void)
102 register_hdlc_protocol(&proto);
103 return 0;
108 static void __exit mod_exit(void)
110 unregister_hdlc_protocol(&proto);
114 module_init(mod_init);
115 module_exit(mod_exit);
117 MODULE_AUTHOR("Krzysztof Halasa <khc@pm.waw.pl>");
118 MODULE_DESCRIPTION("Raw HDLC protocol support for generic HDLC");
119 MODULE_LICENSE("GPL v2");