1 /*****************************************************************************/
4 * hdlcdrv.c -- HDLC packet radio network driver.
6 * Copyright (C) 1996-2000 Thomas Sailer (sailer@ife.ee.ethz.ch)
8 * This program is free software; you can redistribute it and/or modify
9 * it under the terms of the GNU General Public License as published by
10 * the Free Software Foundation; either version 2 of the License, or
11 * (at your option) any later version.
13 * This program is distributed in the hope that it will be useful,
14 * but WITHOUT ANY WARRANTY; without even the implied warranty of
15 * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
16 * GNU General Public License for more details.
18 * You should have received a copy of the GNU General Public License
19 * along with this program; if not, write to the Free Software
20 * Foundation, Inc., 675 Mass Ave, Cambridge, MA 02139, USA.
22 * Please note that the GPL allows you to use the driver, NOT the radio.
23 * In order to use the radio, you need a license from the communications
24 * authority of your country.
26 * The driver was derived from Donald Beckers skeleton.c
27 * Written 1993-94 by Donald Becker.
30 * 0.1 21.09.1996 Started
31 * 18.10.1996 Changed to new user space access routines
32 * (copy_{to,from}_user)
33 * 0.2 21.11.1996 various small changes
34 * 0.3 03.03.1997 fixed (hopefully) IP not working with ax.25 as a module
35 * 0.4 16.04.1997 init code/data tagged
36 * 0.5 30.07.1997 made HDLC buffers bigger (solves a problem with the
38 * 0.6 05.04.1998 add spinlocks
39 * 0.7 03.08.1999 removed some old compatibility cruft
40 * 0.8 12.02.2000 adapted to softnet driver interface
43 /*****************************************************************************/
45 #include <linux/module.h>
46 #include <linux/types.h>
47 #include <linux/net.h>
50 #include <linux/slab.h>
51 #include <linux/errno.h>
52 #include <linux/init.h>
53 #include <linux/bitops.h>
55 #include <linux/netdevice.h>
56 #include <linux/if_arp.h>
57 #include <linux/skbuff.h>
58 #include <linux/hdlcdrv.h>
60 #include <asm/uaccess.h>
62 #include <linux/crc-ccitt.h>
64 /* --------------------------------------------------------------------- */
68 /* --------------------------------------------------------------------- */
70 #define PARAM_TXDELAY 1
71 #define PARAM_PERSIST 2
72 #define PARAM_SLOTTIME 3
73 #define PARAM_TXTAIL 4
74 #define PARAM_FULLDUP 5
75 #define PARAM_HARDWARE 6
76 #define PARAM_RETURN 255
78 /* --------------------------------------------------------------------- */
80 * the CRC routines are stolen from WAMPES
85 /*---------------------------------------------------------------------------*/
87 static inline void append_crc_ccitt(unsigned char *buffer, int len)
89 unsigned int crc = crc_ccitt(0xffff, buffer, len) ^ 0xffff;
94 /*---------------------------------------------------------------------------*/
96 static inline int check_crc_ccitt(const unsigned char *buf, int cnt)
98 return (crc_ccitt(0xffff, buf, cnt) & 0xffff) == 0xf0b8;
101 /*---------------------------------------------------------------------------*/
104 static int calc_crc_ccitt(const unsigned char *buf, int cnt)
106 unsigned int crc = 0xffff;
108 for (; cnt > 0; cnt--)
109 crc = (crc >> 8) ^ crc_ccitt_table[(crc ^ *buf++) & 0xff];
111 return (crc & 0xffff);
115 /* ---------------------------------------------------------------------- */
117 #define tenms_to_2flags(s,tenms) ((tenms * s->par.bitrate) / 100 / 16)
119 /* ---------------------------------------------------------------------- */
124 static int hdlc_rx_add_bytes(struct hdlcdrv_state *s, unsigned int bits,
129 while (s->hdlcrx.rx_state && num >= 8) {
130 if (s->hdlcrx.len >= sizeof(s->hdlcrx.buffer)) {
131 s->hdlcrx.rx_state = 0;
134 *s->hdlcrx.bp++ = bits >> (32-num);
142 static void hdlc_rx_flag(struct net_device *dev, struct hdlcdrv_state *s)
148 if (s->hdlcrx.len < 4)
150 if (!check_crc_ccitt(s->hdlcrx.buffer, s->hdlcrx.len))
152 pkt_len = s->hdlcrx.len - 2 + 1; /* KISS kludge */
153 if (!(skb = dev_alloc_skb(pkt_len))) {
154 printk("%s: memory squeeze, dropping packet\n", dev->name);
155 s->stats.rx_dropped++;
158 cp = skb_put(skb, pkt_len);
159 *cp++ = 0; /* KISS kludge */
160 memcpy(cp, s->hdlcrx.buffer, pkt_len - 1);
161 skb->protocol = ax25_type_trans(skb, dev);
163 dev->last_rx = jiffies;
164 s->stats.rx_packets++;
167 void hdlcdrv_receiver(struct net_device *dev, struct hdlcdrv_state *s)
170 unsigned int mask1, mask2, mask3, mask4, mask5, mask6, word;
172 if (!s || s->magic != HDLCDRV_MAGIC)
174 if (test_and_set_bit(0, &s->hdlcrx.in_hdlc_rx))
177 while (!hdlcdrv_hbuf_empty(&s->hdlcrx.hbuf)) {
178 word = hdlcdrv_hbuf_get(&s->hdlcrx.hbuf);
181 hdlcdrv_add_bitbuffer_word(&s->bitbuf_hdlc, word);
182 #endif /* HDLCDRV_DEBUG */
183 s->hdlcrx.bitstream >>= 16;
184 s->hdlcrx.bitstream |= word << 16;
185 s->hdlcrx.bitbuf >>= 16;
186 s->hdlcrx.bitbuf |= word << 16;
187 s->hdlcrx.numbits += 16;
188 for(i = 15, mask1 = 0x1fc00, mask2 = 0x1fe00, mask3 = 0x0fc00,
189 mask4 = 0x1f800, mask5 = 0xf800, mask6 = 0xffff;
191 i--, mask1 <<= 1, mask2 <<= 1, mask3 <<= 1, mask4 <<= 1,
192 mask5 <<= 1, mask6 = (mask6 << 1) | 1) {
193 if ((s->hdlcrx.bitstream & mask1) == mask1)
194 s->hdlcrx.rx_state = 0; /* abort received */
195 else if ((s->hdlcrx.bitstream & mask2) == mask3) {
197 if (s->hdlcrx.rx_state) {
198 hdlc_rx_add_bytes(s, s->hdlcrx.bitbuf
202 hdlc_rx_flag(dev, s);
205 s->hdlcrx.bp = s->hdlcrx.buffer;
206 s->hdlcrx.rx_state = 1;
207 s->hdlcrx.numbits = i;
208 } else if ((s->hdlcrx.bitstream & mask4) == mask5) {
211 s->hdlcrx.bitbuf = (s->hdlcrx.bitbuf & (~mask6)) |
212 ((s->hdlcrx.bitbuf & mask6) << 1);
215 s->hdlcrx.numbits -= hdlc_rx_add_bytes(s, s->hdlcrx.bitbuf,
218 clear_bit(0, &s->hdlcrx.in_hdlc_rx);
221 /* ---------------------------------------------------------------------- */
223 static inline void do_kiss_params(struct hdlcdrv_state *s,
224 unsigned char *data, unsigned long len)
228 #define PKP(a,b) printk(KERN_INFO "hdlcdrv.c: channel params: " a "\n", b)
229 #else /* KISS_VERBOSE */
231 #endif /* KISS_VERBOSE */
237 s->ch_params.tx_delay = data[1];
238 PKP("TX delay = %ums", 10 * s->ch_params.tx_delay);
241 s->ch_params.ppersist = data[1];
242 PKP("p persistence = %u", s->ch_params.ppersist);
245 s->ch_params.slottime = data[1];
246 PKP("slot time = %ums", s->ch_params.slottime);
249 s->ch_params.tx_tail = data[1];
250 PKP("TX tail = %ums", s->ch_params.tx_tail);
253 s->ch_params.fulldup = !!data[1];
254 PKP("%s duplex", s->ch_params.fulldup ? "full" : "half");
262 /* ---------------------------------------------------------------------- */
264 void hdlcdrv_transmitter(struct net_device *dev, struct hdlcdrv_state *s)
266 unsigned int mask1, mask2, mask3;
271 if (!s || s->magic != HDLCDRV_MAGIC)
273 if (test_and_set_bit(0, &s->hdlctx.in_hdlc_tx))
276 if (s->hdlctx.numbits >= 16) {
277 if (hdlcdrv_hbuf_full(&s->hdlctx.hbuf)) {
278 clear_bit(0, &s->hdlctx.in_hdlc_tx);
281 hdlcdrv_hbuf_put(&s->hdlctx.hbuf, s->hdlctx.bitbuf);
282 s->hdlctx.bitbuf >>= 16;
283 s->hdlctx.numbits -= 16;
285 switch (s->hdlctx.tx_state) {
287 clear_bit(0, &s->hdlctx.in_hdlc_tx);
291 if (s->hdlctx.numflags) {
292 s->hdlctx.numflags--;
294 0x7e7e << s->hdlctx.numbits;
295 s->hdlctx.numbits += 16;
298 if (s->hdlctx.tx_state == 1) {
299 clear_bit(0, &s->hdlctx.in_hdlc_tx);
302 if (!(skb = s->skb)) {
303 int flgs = tenms_to_2flags(s, s->ch_params.tx_tail);
306 s->hdlctx.tx_state = 1;
307 s->hdlctx.numflags = flgs;
311 netif_wake_queue(dev);
312 pkt_len = skb->len-1; /* strip KISS byte */
313 if (pkt_len >= HDLCDRV_MAXFLEN || pkt_len < 2) {
314 s->hdlctx.tx_state = 0;
315 s->hdlctx.numflags = 1;
316 dev_kfree_skb_irq(skb);
319 memcpy(s->hdlctx.buffer, skb->data+1, pkt_len);
320 dev_kfree_skb_irq(skb);
321 s->hdlctx.bp = s->hdlctx.buffer;
322 append_crc_ccitt(s->hdlctx.buffer, pkt_len);
323 s->hdlctx.len = pkt_len+2; /* the appended CRC */
324 s->hdlctx.tx_state = 2;
325 s->hdlctx.bitstream = 0;
326 s->stats.tx_packets++;
329 if (!s->hdlctx.len) {
330 s->hdlctx.tx_state = 0;
331 s->hdlctx.numflags = 1;
335 s->hdlctx.bitbuf |= *s->hdlctx.bp <<
337 s->hdlctx.bitstream >>= 8;
338 s->hdlctx.bitstream |= (*s->hdlctx.bp++) << 16;
341 mask3 = 0xffffffff >> (31-s->hdlctx.numbits);
342 s->hdlctx.numbits += 8;
343 for(i = 0; i < 8; i++, mask1 <<= 1, mask2 <<= 1,
344 mask3 = (mask3 << 1) | 1) {
345 if ((s->hdlctx.bitstream & mask1) != mask1)
347 s->hdlctx.bitstream &= ~mask2;
349 (s->hdlctx.bitbuf & mask3) |
353 mask3 = (mask3 << 1) | 1;
360 /* ---------------------------------------------------------------------- */
362 static void start_tx(struct net_device *dev, struct hdlcdrv_state *s)
364 s->hdlctx.tx_state = 0;
365 s->hdlctx.numflags = tenms_to_2flags(s, s->ch_params.tx_delay);
366 s->hdlctx.bitbuf = s->hdlctx.bitstream = s->hdlctx.numbits = 0;
367 hdlcdrv_transmitter(dev, s);
372 /* ---------------------------------------------------------------------- */
374 static unsigned short random_seed;
376 static inline unsigned short random_num(void)
378 random_seed = 28629 * random_seed + 157;
382 /* ---------------------------------------------------------------------- */
384 void hdlcdrv_arbitrate(struct net_device *dev, struct hdlcdrv_state *s)
386 if (!s || s->magic != HDLCDRV_MAGIC || s->hdlctx.ptt || !s->skb)
388 if (s->ch_params.fulldup) {
393 s->hdlctx.slotcnt = s->ch_params.slottime;
396 if ((--s->hdlctx.slotcnt) > 0)
398 s->hdlctx.slotcnt = s->ch_params.slottime;
399 if ((random_num() % 256) > s->ch_params.ppersist)
404 /* --------------------------------------------------------------------- */
406 * ===================== network driver interface =========================
409 static int hdlcdrv_send_packet(struct sk_buff *skb, struct net_device *dev)
411 struct hdlcdrv_state *sm = netdev_priv(dev);
413 if (skb->data[0] != 0) {
414 do_kiss_params(sm, skb->data, skb->len);
420 netif_stop_queue(dev);
425 /* --------------------------------------------------------------------- */
427 static int hdlcdrv_set_mac_address(struct net_device *dev, void *addr)
429 struct sockaddr *sa = (struct sockaddr *)addr;
431 /* addr is an AX.25 shifted ASCII mac address */
432 memcpy(dev->dev_addr, sa->sa_data, dev->addr_len);
436 /* --------------------------------------------------------------------- */
438 static struct net_device_stats *hdlcdrv_get_stats(struct net_device *dev)
440 struct hdlcdrv_state *sm = netdev_priv(dev);
443 * Get the current statistics. This may be called with the
444 * card open or closed.
449 /* --------------------------------------------------------------------- */
451 * Open/initialize the board. This is called (in the current kernel)
452 * sometime after booting when the 'ifconfig' program is run.
454 * This routine should set everything up anew at each open, even
455 * registers that "should" only need to be set once at boot, so that
456 * there is non-reboot way to recover if something goes wrong.
459 static int hdlcdrv_open(struct net_device *dev)
461 struct hdlcdrv_state *s = netdev_priv(dev);
464 if (!s->ops || !s->ops->open)
468 * initialise some variables
471 s->hdlcrx.hbuf.rd = s->hdlcrx.hbuf.wr = 0;
472 s->hdlcrx.in_hdlc_rx = 0;
473 s->hdlcrx.rx_state = 0;
475 s->hdlctx.hbuf.rd = s->hdlctx.hbuf.wr = 0;
476 s->hdlctx.in_hdlc_tx = 0;
477 s->hdlctx.tx_state = 1;
478 s->hdlctx.numflags = 0;
479 s->hdlctx.bitstream = s->hdlctx.bitbuf = s->hdlctx.numbits = 0;
481 s->hdlctx.slotcnt = s->ch_params.slottime;
482 s->hdlctx.calibrate = 0;
484 i = s->ops->open(dev);
487 netif_start_queue(dev);
491 /* --------------------------------------------------------------------- */
493 * The inverse routine to hdlcdrv_open().
496 static int hdlcdrv_close(struct net_device *dev)
498 struct hdlcdrv_state *s = netdev_priv(dev);
501 netif_stop_queue(dev);
503 if (s->ops && s->ops->close)
504 i = s->ops->close(dev);
506 dev_kfree_skb(s->skb);
512 /* --------------------------------------------------------------------- */
514 static int hdlcdrv_ioctl(struct net_device *dev, struct ifreq *ifr, int cmd)
516 struct hdlcdrv_state *s = netdev_priv(dev);
517 struct hdlcdrv_ioctl bi;
519 if (cmd != SIOCDEVPRIVATE) {
520 if (s->ops && s->ops->ioctl)
521 return s->ops->ioctl(dev, ifr, &bi, cmd);
524 if (copy_from_user(&bi, ifr->ifr_data, sizeof(bi)))
529 if (s->ops && s->ops->ioctl)
530 return s->ops->ioctl(dev, ifr, &bi, cmd);
533 case HDLCDRVCTL_GETCHANNELPAR:
534 bi.data.cp.tx_delay = s->ch_params.tx_delay;
535 bi.data.cp.tx_tail = s->ch_params.tx_tail;
536 bi.data.cp.slottime = s->ch_params.slottime;
537 bi.data.cp.ppersist = s->ch_params.ppersist;
538 bi.data.cp.fulldup = s->ch_params.fulldup;
541 case HDLCDRVCTL_SETCHANNELPAR:
542 if (!capable(CAP_NET_ADMIN))
544 s->ch_params.tx_delay = bi.data.cp.tx_delay;
545 s->ch_params.tx_tail = bi.data.cp.tx_tail;
546 s->ch_params.slottime = bi.data.cp.slottime;
547 s->ch_params.ppersist = bi.data.cp.ppersist;
548 s->ch_params.fulldup = bi.data.cp.fulldup;
549 s->hdlctx.slotcnt = 1;
552 case HDLCDRVCTL_GETMODEMPAR:
553 bi.data.mp.iobase = dev->base_addr;
554 bi.data.mp.irq = dev->irq;
555 bi.data.mp.dma = dev->dma;
556 bi.data.mp.dma2 = s->ptt_out.dma2;
557 bi.data.mp.seriobase = s->ptt_out.seriobase;
558 bi.data.mp.pariobase = s->ptt_out.pariobase;
559 bi.data.mp.midiiobase = s->ptt_out.midiiobase;
562 case HDLCDRVCTL_SETMODEMPAR:
563 if ((!capable(CAP_SYS_RAWIO)) || netif_running(dev))
565 dev->base_addr = bi.data.mp.iobase;
566 dev->irq = bi.data.mp.irq;
567 dev->dma = bi.data.mp.dma;
568 s->ptt_out.dma2 = bi.data.mp.dma2;
569 s->ptt_out.seriobase = bi.data.mp.seriobase;
570 s->ptt_out.pariobase = bi.data.mp.pariobase;
571 s->ptt_out.midiiobase = bi.data.mp.midiiobase;
574 case HDLCDRVCTL_GETSTAT:
575 bi.data.cs.ptt = hdlcdrv_ptt(s);
576 bi.data.cs.dcd = s->hdlcrx.dcd;
577 bi.data.cs.ptt_keyed = s->ptt_keyed;
578 bi.data.cs.tx_packets = s->stats.tx_packets;
579 bi.data.cs.tx_errors = s->stats.tx_errors;
580 bi.data.cs.rx_packets = s->stats.rx_packets;
581 bi.data.cs.rx_errors = s->stats.rx_errors;
584 case HDLCDRVCTL_OLDGETSTAT:
585 bi.data.ocs.ptt = hdlcdrv_ptt(s);
586 bi.data.ocs.dcd = s->hdlcrx.dcd;
587 bi.data.ocs.ptt_keyed = s->ptt_keyed;
590 case HDLCDRVCTL_CALIBRATE:
591 if(!capable(CAP_SYS_RAWIO))
593 s->hdlctx.calibrate = bi.data.calibrate * s->par.bitrate / 16;
596 case HDLCDRVCTL_GETSAMPLES:
597 #ifndef HDLCDRV_DEBUG
599 #else /* HDLCDRV_DEBUG */
600 if (s->bitbuf_channel.rd == s->bitbuf_channel.wr)
603 s->bitbuf_channel.buffer[s->bitbuf_channel.rd];
604 s->bitbuf_channel.rd = (s->bitbuf_channel.rd+1) %
605 sizeof(s->bitbuf_channel.buffer);
607 #endif /* HDLCDRV_DEBUG */
609 case HDLCDRVCTL_GETBITS:
610 #ifndef HDLCDRV_DEBUG
612 #else /* HDLCDRV_DEBUG */
613 if (s->bitbuf_hdlc.rd == s->bitbuf_hdlc.wr)
616 s->bitbuf_hdlc.buffer[s->bitbuf_hdlc.rd];
617 s->bitbuf_hdlc.rd = (s->bitbuf_hdlc.rd+1) %
618 sizeof(s->bitbuf_hdlc.buffer);
620 #endif /* HDLCDRV_DEBUG */
622 case HDLCDRVCTL_DRIVERNAME:
623 if (s->ops && s->ops->drvname) {
624 strncpy(bi.data.drivername, s->ops->drvname,
625 sizeof(bi.data.drivername));
628 bi.data.drivername[0] = '\0';
632 if (copy_to_user(ifr->ifr_data, &bi, sizeof(bi)))
638 /* --------------------------------------------------------------------- */
641 * Initialize fields in hdlcdrv
643 static void hdlcdrv_setup(struct net_device *dev)
645 static const struct hdlcdrv_channel_params dflt_ch_params = {
648 struct hdlcdrv_state *s = netdev_priv(dev);
651 * initialize the hdlcdrv_state struct
653 s->ch_params = dflt_ch_params;
656 spin_lock_init(&s->hdlcrx.hbuf.lock);
657 s->hdlcrx.hbuf.rd = s->hdlcrx.hbuf.wr = 0;
658 s->hdlcrx.in_hdlc_rx = 0;
659 s->hdlcrx.rx_state = 0;
661 spin_lock_init(&s->hdlctx.hbuf.lock);
662 s->hdlctx.hbuf.rd = s->hdlctx.hbuf.wr = 0;
663 s->hdlctx.in_hdlc_tx = 0;
664 s->hdlctx.tx_state = 1;
665 s->hdlctx.numflags = 0;
666 s->hdlctx.bitstream = s->hdlctx.bitbuf = s->hdlctx.numbits = 0;
668 s->hdlctx.slotcnt = s->ch_params.slottime;
669 s->hdlctx.calibrate = 0;
672 s->bitbuf_channel.rd = s->bitbuf_channel.wr = 0;
673 s->bitbuf_channel.shreg = 0x80;
675 s->bitbuf_hdlc.rd = s->bitbuf_hdlc.wr = 0;
676 s->bitbuf_hdlc.shreg = 0x80;
677 #endif /* HDLCDRV_DEBUG */
680 * initialize the device struct
682 dev->open = hdlcdrv_open;
683 dev->stop = hdlcdrv_close;
684 dev->do_ioctl = hdlcdrv_ioctl;
685 dev->hard_start_xmit = hdlcdrv_send_packet;
686 dev->get_stats = hdlcdrv_get_stats;
688 /* Fill in the fields of the device structure */
692 dev->hard_header = ax25_hard_header;
693 dev->rebuild_header = ax25_rebuild_header;
694 dev->set_mac_address = hdlcdrv_set_mac_address;
696 dev->type = ARPHRD_AX25; /* AF_AX25 device */
697 dev->hard_header_len = AX25_MAX_HEADER_LEN + AX25_BPQ_HEADER_LEN;
698 dev->mtu = AX25_DEF_PACLEN; /* eth_mtu is the default */
699 dev->addr_len = AX25_ADDR_LEN; /* sizeof an ax.25 address */
700 memcpy(dev->broadcast, &ax25_bcast, AX25_ADDR_LEN);
701 memcpy(dev->dev_addr, &ax25_defaddr, AX25_ADDR_LEN);
702 dev->tx_queue_len = 16;
705 /* --------------------------------------------------------------------- */
706 struct net_device *hdlcdrv_register(const struct hdlcdrv_ops *ops,
707 unsigned int privsize, const char *ifname,
708 unsigned int baseaddr, unsigned int irq,
711 struct net_device *dev;
712 struct hdlcdrv_state *s;
717 if (privsize < sizeof(struct hdlcdrv_state))
718 privsize = sizeof(struct hdlcdrv_state);
720 dev = alloc_netdev(privsize, ifname, hdlcdrv_setup);
722 return ERR_PTR(-ENOMEM);
725 * initialize part of the hdlcdrv_state struct
727 s = netdev_priv(dev);
728 s->magic = HDLCDRV_MAGIC;
730 dev->base_addr = baseaddr;
734 err = register_netdev(dev);
736 printk(KERN_WARNING "hdlcdrv: cannot register net "
737 "device %s\n", dev->name);
744 /* --------------------------------------------------------------------- */
746 void hdlcdrv_unregister(struct net_device *dev)
748 struct hdlcdrv_state *s = netdev_priv(dev);
750 BUG_ON(s->magic != HDLCDRV_MAGIC);
752 if (s->opened && s->ops->close)
754 unregister_netdev(dev);
759 /* --------------------------------------------------------------------- */
761 EXPORT_SYMBOL(hdlcdrv_receiver);
762 EXPORT_SYMBOL(hdlcdrv_transmitter);
763 EXPORT_SYMBOL(hdlcdrv_arbitrate);
764 EXPORT_SYMBOL(hdlcdrv_register);
765 EXPORT_SYMBOL(hdlcdrv_unregister);
767 /* --------------------------------------------------------------------- */
769 static int __init hdlcdrv_init_driver(void)
771 printk(KERN_INFO "hdlcdrv: (C) 1996-2000 Thomas Sailer HB9JNX/AE4WA\n");
772 printk(KERN_INFO "hdlcdrv: version 0.8 compiled " __TIME__ " " __DATE__ "\n");
776 /* --------------------------------------------------------------------- */
778 static void __exit hdlcdrv_cleanup_driver(void)
780 printk(KERN_INFO "hdlcdrv: cleanup\n");
783 /* --------------------------------------------------------------------- */
785 MODULE_AUTHOR("Thomas M. Sailer, sailer@ife.ee.ethz.ch, hb9jnx@hb9w.che.eu");
786 MODULE_DESCRIPTION("Packet Radio network interface HDLC encoder/decoder");
787 MODULE_LICENSE("GPL");
788 module_init(hdlcdrv_init_driver);
789 module_exit(hdlcdrv_cleanup_driver);
791 /* --------------------------------------------------------------------- */