141 	struct sixpack *sp = (struct sixpack *) channel;  in sp_xmit_on_air()  local
142 	int actual, when = sp->slottime;  in sp_xmit_on_air()
147 	if (((sp->status1 & SIXP_DCD_MASK) == 0) && (random < sp->persistence)) {  in sp_xmit_on_air()
148 		sp->led_state = 0x70;  in sp_xmit_on_air()
149 		sp->tty->ops->write(sp->tty, &sp->led_state, 1);  in sp_xmit_on_air()
150 		sp->tx_enable = 1;  in sp_xmit_on_air()
151 		actual = sp->tty->ops->write(sp->tty, sp->xbuff, sp->status2);  in sp_xmit_on_air()
152 		sp->xleft -= actual;  in sp_xmit_on_air()
153 		sp->xhead += actual;  in sp_xmit_on_air()
154 		sp->led_state = 0x60;  in sp_xmit_on_air()
155 		sp->tty->ops->write(sp->tty, &sp->led_state, 1);  in sp_xmit_on_air()
156 		sp->status2 = 0;  in sp_xmit_on_air()
158 		mod_timer(&sp->tx_t, jiffies + ((when + 1) * HZ) / 100);  in sp_xmit_on_air()
164 static void sp_encaps(struct sixpack *sp, unsigned char *icp, int len)  in sp_encaps()  argument
169 	if (len > sp->mtu) {	/* sp->mtu = AX25_MTU = max. PACLEN = 256 */  in sp_encaps()
174 	if (len > sp->mtu) {	/* sp->mtu = AX25_MTU = max. PACLEN = 256 */  in sp_encaps()
194 	count = encode_sixpack(p, sp->xbuff, len, sp->tx_delay);  in sp_encaps()
195 	set_bit(TTY_DO_WRITE_WAKEUP, &sp->tty->flags);  in sp_encaps()
198 	case 1:	sp->tx_delay = p[1];  in sp_encaps()
200 	case 2:	sp->persistence = p[1];  in sp_encaps()
202 	case 3:	sp->slottime = p[1];  in sp_encaps()
206 	case 5:	sp->duplex = p[1];  in sp_encaps()
219 	if (sp->duplex == 1) {  in sp_encaps()
220 		sp->led_state = 0x70;  in sp_encaps()
221 		sp->tty->ops->write(sp->tty, &sp->led_state, 1);  in sp_encaps()
222 		sp->tx_enable = 1;  in sp_encaps()
223 		actual = sp->tty->ops->write(sp->tty, sp->xbuff, count);  in sp_encaps()
224 		sp->xleft = count - actual;  in sp_encaps()
225 		sp->xhead = sp->xbuff + actual;  in sp_encaps()
226 		sp->led_state = 0x60;  in sp_encaps()
227 		sp->tty->ops->write(sp->tty, &sp->led_state, 1);  in sp_encaps()
229 		sp->xleft = count;  in sp_encaps()
230 		sp->xhead = sp->xbuff;  in sp_encaps()
231 		sp->status2 = count;  in sp_encaps()
232 		sp_xmit_on_air((unsigned long)sp);  in sp_encaps()
238 	sp->dev->stats.tx_dropped++;  in sp_encaps()
239 	netif_start_queue(sp->dev);  in sp_encaps()
241 		printk(KERN_DEBUG "%s: %s - dropped.\n", sp->dev->name, msg);  in sp_encaps()
248 	struct sixpack *sp = netdev_priv(dev);  in sp_xmit()  local
253 	spin_lock_bh(&sp->lock);  in sp_xmit()
257 	sp_encaps(sp, skb->data, skb->len);  in sp_xmit()
258 	spin_unlock_bh(&sp->lock);  in sp_xmit()
267 	struct sixpack *sp = netdev_priv(dev);  in sp_open_dev()  local
269 	if (sp->tty == NULL)  in sp_open_dev()
277 	struct sixpack *sp = netdev_priv(dev);  in sp_close()  local
279 	spin_lock_bh(&sp->lock);  in sp_close()
280 	if (sp->tty) {  in sp_close()
282 		clear_bit(TTY_DO_WRITE_WAKEUP, &sp->tty->flags);  in sp_close()
285 	spin_unlock_bh(&sp->lock);  in sp_close()
337 static void sp_bump(struct sixpack *sp, char cmd)  in sp_bump()  argument
343 	count = sp->rcount + 1;  in sp_bump()
345 	sp->dev->stats.rx_bytes += count;  in sp_bump()
353 	memcpy(ptr, sp->cooked_buf + 1, count);  in sp_bump()
354 	skb->protocol = ax25_type_trans(skb, sp->dev);  in sp_bump()
356 	sp->dev->stats.rx_packets++;  in sp_bump()
361 	sp->dev->stats.rx_dropped++;  in sp_bump()
379 	struct sixpack *sp;  in sp_get()  local
382 	sp = tty->disc_data;  in sp_get()
383 	if (sp)  in sp_get()
384 		atomic_inc(&sp->refcnt);  in sp_get()
387 	return sp;  in sp_get()
390 static void sp_put(struct sixpack *sp)  in sp_put()  argument
392 	if (atomic_dec_and_test(&sp->refcnt))  in sp_put()
393 		up(&sp->dead_sem);  in sp_put()
402 	struct sixpack *sp = sp_get(tty);  in sixpack_write_wakeup()  local
405 	if (!sp)  in sixpack_write_wakeup()
407 	if (sp->xleft <= 0)  {  in sixpack_write_wakeup()
410 		sp->dev->stats.tx_packets++;  in sixpack_write_wakeup()
412 		sp->tx_enable = 0;  in sixpack_write_wakeup()
413 		netif_wake_queue(sp->dev);  in sixpack_write_wakeup()
417 	if (sp->tx_enable) {  in sixpack_write_wakeup()
418 		actual = tty->ops->write(tty, sp->xhead, sp->xleft);  in sixpack_write_wakeup()
419 		sp->xleft -= actual;  in sixpack_write_wakeup()
420 		sp->xhead += actual;  in sixpack_write_wakeup()
424 	sp_put(sp);  in sixpack_write_wakeup()
438 	struct sixpack *sp;  in sixpack_receive_buf()  local
445 	sp = sp_get(tty);  in sixpack_receive_buf()
446 	if (!sp)  in sixpack_receive_buf()
457 			if (!test_and_set_bit(SIXPF_ERROR, &sp->flags))  in sixpack_receive_buf()
458 				sp->dev->stats.rx_errors++;  in sixpack_receive_buf()
462 	sixpack_decode(sp, buf, count1);  in sixpack_receive_buf()
464 	sp_put(sp);  in sixpack_receive_buf()
478 static void __tnc_set_sync_state(struct sixpack *sp, int new_tnc_state)  in __tnc_set_sync_state()  argument
495 	sp->tnc_state = new_tnc_state;  in __tnc_set_sync_state()
496 	printk(KERN_INFO "%s: %s\n", sp->dev->name, msg);  in __tnc_set_sync_state()
499 static inline void tnc_set_sync_state(struct sixpack *sp, int new_tnc_state)  in tnc_set_sync_state()  argument
501 	int old_tnc_state = sp->tnc_state;  in tnc_set_sync_state()
504 		__tnc_set_sync_state(sp, new_tnc_state);  in tnc_set_sync_state()
509 	struct sixpack *sp = (struct sixpack *) channel;  in resync_tnc()  local
514 	sp->rx_count = 0;  in resync_tnc()
515 	sp->rx_count_cooked = 0;  in resync_tnc()
519 	sp->status = 1;  in resync_tnc()
520 	sp->status1 = 1;  in resync_tnc()
521 	sp->status2 = 0;  in resync_tnc()
525 	sp->led_state = 0x60;  in resync_tnc()
526 	sp->tty->ops->write(sp->tty, &sp->led_state, 1);  in resync_tnc()
527 	sp->tty->ops->write(sp->tty, &resync_cmd, 1);  in resync_tnc()
532 	del_timer(&sp->resync_t);  in resync_tnc()
533 	sp->resync_t.data	= (unsigned long) sp;  in resync_tnc()
534 	sp->resync_t.function	= resync_tnc;  in resync_tnc()
535 	sp->resync_t.expires	= jiffies + SIXP_RESYNC_TIMEOUT;  in resync_tnc()
536 	add_timer(&sp->resync_t);  in resync_tnc()
539 static inline int tnc_init(struct sixpack *sp)  in tnc_init()  argument
543 	tnc_set_sync_state(sp, TNC_UNSYNC_STARTUP);  in tnc_init()
545 	sp->tty->ops->write(sp->tty, &inbyte, 1);  in tnc_init()
547 	del_timer(&sp->resync_t);  in tnc_init()
548 	sp->resync_t.data = (unsigned long) sp;  in tnc_init()
549 	sp->resync_t.function = resync_tnc;  in tnc_init()
550 	sp->resync_t.expires = jiffies + SIXP_RESYNC_TIMEOUT;  in tnc_init()
551 	add_timer(&sp->resync_t);  in tnc_init()
567 	struct sixpack *sp;  in sixpack_open()  local
583 	sp = netdev_priv(dev);  in sixpack_open()
584 	sp->dev = dev;  in sixpack_open()
586 	spin_lock_init(&sp->lock);  in sixpack_open()
587 	atomic_set(&sp->refcnt, 1);  in sixpack_open()
588 	sema_init(&sp->dead_sem, 0);  in sixpack_open()
602 	spin_lock_bh(&sp->lock);  in sixpack_open()
604 	sp->tty = tty;  in sixpack_open()
606 	sp->rbuff	= rbuff;  in sixpack_open()
607 	sp->xbuff	= xbuff;  in sixpack_open()
609 	sp->mtu		= AX25_MTU + 73;  in sixpack_open()
610 	sp->buffsize	= len;  in sixpack_open()
611 	sp->rcount	= 0;  in sixpack_open()
612 	sp->rx_count	= 0;  in sixpack_open()
613 	sp->rx_count_cooked = 0;  in sixpack_open()
614 	sp->xleft	= 0;  in sixpack_open()
616 	sp->flags	= 0;		/* Clear ESCAPE & ERROR flags */  in sixpack_open()
618 	sp->duplex	= 0;  in sixpack_open()
619 	sp->tx_delay    = SIXP_TXDELAY;  in sixpack_open()
620 	sp->persistence = SIXP_PERSIST;  in sixpack_open()
621 	sp->slottime    = SIXP_SLOTTIME;  in sixpack_open()
622 	sp->led_state   = 0x60;  in sixpack_open()
623 	sp->status      = 1;  in sixpack_open()
624 	sp->status1     = 1;  in sixpack_open()
625 	sp->status2     = 0;  in sixpack_open()
626 	sp->tx_enable   = 0;  in sixpack_open()
630 	init_timer(&sp->tx_t);  in sixpack_open()
631 	sp->tx_t.function = sp_xmit_on_air;  in sixpack_open()
632 	sp->tx_t.data = (unsigned long) sp;  in sixpack_open()
634 	init_timer(&sp->resync_t);  in sixpack_open()
636 	spin_unlock_bh(&sp->lock);  in sixpack_open()
639 	tty->disc_data = sp;  in sixpack_open()
647 	tnc_init(sp);  in sixpack_open()
670 	struct sixpack *sp;  in sixpack_close()  local
673 	sp = tty->disc_data;  in sixpack_close()
676 	if (!sp)  in sixpack_close()
683 	if (!atomic_dec_and_test(&sp->refcnt))  in sixpack_close()
684 		down(&sp->dead_sem);  in sixpack_close()
690 	netif_stop_queue(sp->dev);  in sixpack_close()
692 	del_timer_sync(&sp->tx_t);  in sixpack_close()
693 	del_timer_sync(&sp->resync_t);  in sixpack_close()
696 	kfree(sp->rbuff);  in sixpack_close()
697 	kfree(sp->xbuff);  in sixpack_close()
699 	unregister_netdev(sp->dev);  in sixpack_close()
706 	struct sixpack *sp = sp_get(tty);  in sixpack_ioctl()  local
710 	if (!sp)  in sixpack_ioctl()
712 	dev = sp->dev;  in sixpack_ioctl()
730 		sp->mode = tmp;  in sixpack_ioctl()
760 	sp_put(sp);  in sixpack_ioctl()
867 static void decode_data(struct sixpack *sp, unsigned char inbyte)  in decode_data()  argument
871 	if (sp->rx_count != 3) {  in decode_data()
872 		sp->raw_buf[sp->rx_count++] = inbyte;  in decode_data()
877 	buf = sp->raw_buf;  in decode_data()
878 	sp->cooked_buf[sp->rx_count_cooked++] =  in decode_data()
880 	sp->cooked_buf[sp->rx_count_cooked++] =  in decode_data()
882 	sp->cooked_buf[sp->rx_count_cooked++] =  in decode_data()
884 	sp->rx_count = 0;  in decode_data()
889 static void decode_prio_command(struct sixpack *sp, unsigned char cmd)  in decode_prio_command()  argument
904 		if (((sp->status & SIXP_DCD_MASK) == 0) &&  in decode_prio_command()
906 				if (sp->status != 1)  in decode_prio_command()
909 					sp->status = 0;  in decode_prio_command()
912 		sp->status = cmd & SIXP_PRIO_DATA_MASK;  in decode_prio_command()
914 		if ((sp->status2 != 0) && (sp->duplex == 1)) {  in decode_prio_command()
915 			sp->led_state = 0x70;  in decode_prio_command()
916 			sp->tty->ops->write(sp->tty, &sp->led_state, 1);  in decode_prio_command()
917 			sp->tx_enable = 1;  in decode_prio_command()
918 			actual = sp->tty->ops->write(sp->tty, sp->xbuff, sp->status2);  in decode_prio_command()
919 			sp->xleft -= actual;  in decode_prio_command()
920 			sp->xhead += actual;  in decode_prio_command()
921 			sp->led_state = 0x60;  in decode_prio_command()
922 			sp->status2 = 0;  in decode_prio_command()
928 	sp->tty->ops->write(sp->tty, &sp->led_state, 1);  in decode_prio_command()
933 	if (sp->tnc_state == TNC_IN_SYNC) {  in decode_prio_command()
934 		del_timer(&sp->resync_t);  in decode_prio_command()
935 		sp->resync_t.data	= (unsigned long) sp;  in decode_prio_command()
936 		sp->resync_t.function	= resync_tnc;  in decode_prio_command()
937 		sp->resync_t.expires	= jiffies + SIXP_INIT_RESYNC_TIMEOUT;  in decode_prio_command()
938 		add_timer(&sp->resync_t);  in decode_prio_command()
941 	sp->status1 = cmd & SIXP_PRIO_DATA_MASK;  in decode_prio_command()
946 static void decode_std_command(struct sixpack *sp, unsigned char cmd)  in decode_std_command()  argument
954 		if ((sp->rx_count == 0) && (sp->rx_count_cooked == 0)) {  in decode_std_command()
955 			if ((sp->status & SIXP_RX_DCD_MASK) ==  in decode_std_command()
957 				sp->led_state = 0x68;  in decode_std_command()
958 				sp->tty->ops->write(sp->tty, &sp->led_state, 1);  in decode_std_command()
961 			sp->led_state = 0x60;  in decode_std_command()
963 			sp->tty->ops->write(sp->tty, &sp->led_state, 1);  in decode_std_command()
964 			rest = sp->rx_count;  in decode_std_command()
967 					decode_data(sp, 0);  in decode_std_command()
969 				sp->rx_count_cooked -= 2;  in decode_std_command()
971 				sp->rx_count_cooked -= 1;  in decode_std_command()
972 			for (i = 0; i < sp->rx_count_cooked; i++)  in decode_std_command()
973 				checksum += sp->cooked_buf[i];  in decode_std_command()
977 				sp->rcount = sp->rx_count_cooked-2;  in decode_std_command()
978 				sp_bump(sp, 0);  in decode_std_command()
980 			sp->rx_count_cooked = 0;  in decode_std_command()
995 sixpack_decode(struct sixpack *sp, unsigned char *pre_rbuff, int count)  in sixpack_decode()  argument
1003 			tnc_set_sync_state(sp, TNC_IN_SYNC);  in sixpack_decode()
1004 			del_timer(&sp->resync_t);  in sixpack_decode()
1007 			decode_prio_command(sp, inbyte);  in sixpack_decode()
1009 			decode_std_command(sp, inbyte);  in sixpack_decode()
1010 		else if ((sp->status & SIXP_RX_DCD_MASK) == SIXP_RX_DCD_MASK)  in sixpack_decode()
1011 			decode_data(sp, inbyte);  in sixpack_decode()