142 	struct sixpack *sp = from_timer(sp, t, tx_t);  in sp_xmit_on_air()  local
143 	int actual, when = sp->slottime;  in sp_xmit_on_air()
148 	if (((sp->status1 & SIXP_DCD_MASK) == 0) && (random < sp->persistence)) {  in sp_xmit_on_air()
149 		sp->led_state = 0x70;  in sp_xmit_on_air()
150 		sp->tty->ops->write(sp->tty, &sp->led_state, 1);  in sp_xmit_on_air()
151 		sp->tx_enable = 1;  in sp_xmit_on_air()
152 		actual = sp->tty->ops->write(sp->tty, sp->xbuff, sp->status2);  in sp_xmit_on_air()
153 		sp->xleft -= actual;  in sp_xmit_on_air()
154 		sp->xhead += actual;  in sp_xmit_on_air()
155 		sp->led_state = 0x60;  in sp_xmit_on_air()
156 		sp->tty->ops->write(sp->tty, &sp->led_state, 1);  in sp_xmit_on_air()
157 		sp->status2 = 0;  in sp_xmit_on_air()
159 		mod_timer(&sp->tx_t, jiffies + ((when + 1) * HZ) / 100);  in sp_xmit_on_air()
165 static void sp_encaps(struct sixpack *sp, unsigned char *icp, int len)  in sp_encaps()  argument
170 	if (len > sp->mtu) {	/* sp->mtu = AX25_MTU = max. PACLEN = 256 */  in sp_encaps()
190 	count = encode_sixpack(p, sp->xbuff, len, sp->tx_delay);  in sp_encaps()
191 	set_bit(TTY_DO_WRITE_WAKEUP, &sp->tty->flags);  in sp_encaps()
194 	case 1:	sp->tx_delay = p[1];  in sp_encaps()
196 	case 2:	sp->persistence = p[1];  in sp_encaps()
198 	case 3:	sp->slottime = p[1];  in sp_encaps()
202 	case 5:	sp->duplex = p[1];  in sp_encaps()
215 	if (sp->duplex == 1) {  in sp_encaps()
216 		sp->led_state = 0x70;  in sp_encaps()
217 		sp->tty->ops->write(sp->tty, &sp->led_state, 1);  in sp_encaps()
218 		sp->tx_enable = 1;  in sp_encaps()
219 		actual = sp->tty->ops->write(sp->tty, sp->xbuff, count);  in sp_encaps()
220 		sp->xleft = count - actual;  in sp_encaps()
221 		sp->xhead = sp->xbuff + actual;  in sp_encaps()
222 		sp->led_state = 0x60;  in sp_encaps()
223 		sp->tty->ops->write(sp->tty, &sp->led_state, 1);  in sp_encaps()
225 		sp->xleft = count;  in sp_encaps()
226 		sp->xhead = sp->xbuff;  in sp_encaps()
227 		sp->status2 = count;  in sp_encaps()
228 		sp_xmit_on_air(&sp->tx_t);  in sp_encaps()
234 	sp->dev->stats.tx_dropped++;  in sp_encaps()
235 	netif_start_queue(sp->dev);  in sp_encaps()
237 		printk(KERN_DEBUG "%s: %s - dropped.\n", sp->dev->name, msg);  in sp_encaps()
244 	struct sixpack *sp = netdev_priv(dev);  in sp_xmit()  local
249 	spin_lock_bh(&sp->lock);  in sp_xmit()
253 	sp_encaps(sp, skb->data, skb->len);  in sp_xmit()
254 	spin_unlock_bh(&sp->lock);  in sp_xmit()
263 	struct sixpack *sp = netdev_priv(dev);  in sp_open_dev()  local
265 	if (sp->tty == NULL)  in sp_open_dev()
273 	struct sixpack *sp = netdev_priv(dev);  in sp_close()  local
275 	spin_lock_bh(&sp->lock);  in sp_close()
276 	if (sp->tty) {  in sp_close()
278 		clear_bit(TTY_DO_WRITE_WAKEUP, &sp->tty->flags);  in sp_close()
281 	spin_unlock_bh(&sp->lock);  in sp_close()
332 static void sp_bump(struct sixpack *sp, char cmd)  in sp_bump()  argument
338 	count = sp->rcount + 1;  in sp_bump()
340 	sp->dev->stats.rx_bytes += count;  in sp_bump()
348 	memcpy(ptr, sp->cooked_buf + 1, count);  in sp_bump()
349 	skb->protocol = ax25_type_trans(skb, sp->dev);  in sp_bump()
351 	sp->dev->stats.rx_packets++;  in sp_bump()
356 	sp->dev->stats.rx_dropped++;  in sp_bump()
374 	struct sixpack *sp;  in sp_get()  local
377 	sp = tty->disc_data;  in sp_get()
378 	if (sp)  in sp_get()
379 		refcount_inc(&sp->refcnt);  in sp_get()
382 	return sp;  in sp_get()
385 static void sp_put(struct sixpack *sp)  in sp_put()  argument
387 	if (refcount_dec_and_test(&sp->refcnt))  in sp_put()
388 		complete(&sp->dead);  in sp_put()
397 	struct sixpack *sp = sp_get(tty);  in sixpack_write_wakeup()  local
400 	if (!sp)  in sixpack_write_wakeup()
402 	if (sp->xleft <= 0)  {  in sixpack_write_wakeup()
405 		sp->dev->stats.tx_packets++;  in sixpack_write_wakeup()
407 		sp->tx_enable = 0;  in sixpack_write_wakeup()
408 		netif_wake_queue(sp->dev);  in sixpack_write_wakeup()
412 	if (sp->tx_enable) {  in sixpack_write_wakeup()
413 		actual = tty->ops->write(tty, sp->xhead, sp->xleft);  in sixpack_write_wakeup()
414 		sp->xleft -= actual;  in sixpack_write_wakeup()
415 		sp->xhead += actual;  in sixpack_write_wakeup()
419 	sp_put(sp);  in sixpack_write_wakeup()
433 	struct sixpack *sp;  in sixpack_receive_buf()  local
439 	sp = sp_get(tty);  in sixpack_receive_buf()
440 	if (!sp)  in sixpack_receive_buf()
448 			if (!test_and_set_bit(SIXPF_ERROR, &sp->flags))  in sixpack_receive_buf()
449 				sp->dev->stats.rx_errors++;  in sixpack_receive_buf()
453 	sixpack_decode(sp, cp, count1);  in sixpack_receive_buf()
455 	sp_put(sp);  in sixpack_receive_buf()
469 static void __tnc_set_sync_state(struct sixpack *sp, int new_tnc_state)  in __tnc_set_sync_state()  argument
486 	sp->tnc_state = new_tnc_state;  in __tnc_set_sync_state()
487 	printk(KERN_INFO "%s: %s\n", sp->dev->name, msg);  in __tnc_set_sync_state()
490 static inline void tnc_set_sync_state(struct sixpack *sp, int new_tnc_state)  in tnc_set_sync_state()  argument
492 	int old_tnc_state = sp->tnc_state;  in tnc_set_sync_state()
495 		__tnc_set_sync_state(sp, new_tnc_state);  in tnc_set_sync_state()
500 	struct sixpack *sp = from_timer(sp, t, resync_t);  in resync_tnc()  local
505 	sp->rx_count = 0;  in resync_tnc()
506 	sp->rx_count_cooked = 0;  in resync_tnc()
510 	sp->status = 1;  in resync_tnc()
511 	sp->status1 = 1;  in resync_tnc()
512 	sp->status2 = 0;  in resync_tnc()
516 	sp->led_state = 0x60;  in resync_tnc()
517 	sp->tty->ops->write(sp->tty, &sp->led_state, 1);  in resync_tnc()
518 	sp->tty->ops->write(sp->tty, &resync_cmd, 1);  in resync_tnc()
522 	mod_timer(&sp->resync_t, jiffies + SIXP_RESYNC_TIMEOUT);  in resync_tnc()
525 static inline int tnc_init(struct sixpack *sp)  in tnc_init()  argument
529 	tnc_set_sync_state(sp, TNC_UNSYNC_STARTUP);  in tnc_init()
531 	sp->tty->ops->write(sp->tty, &inbyte, 1);  in tnc_init()
533 	mod_timer(&sp->resync_t, jiffies + SIXP_RESYNC_TIMEOUT);  in tnc_init()
549 	struct sixpack *sp;  in sixpack_open()  local
565 	sp = netdev_priv(dev);  in sixpack_open()
566 	sp->dev = dev;  in sixpack_open()
568 	spin_lock_init(&sp->lock);  in sixpack_open()
569 	spin_lock_init(&sp->rxlock);  in sixpack_open()
570 	refcount_set(&sp->refcnt, 1);  in sixpack_open()
571 	init_completion(&sp->dead);  in sixpack_open()
585 	spin_lock_bh(&sp->lock);  in sixpack_open()
587 	sp->tty = tty;  in sixpack_open()
589 	sp->rbuff	= rbuff;  in sixpack_open()
590 	sp->xbuff	= xbuff;  in sixpack_open()
592 	sp->mtu		= AX25_MTU + 73;  in sixpack_open()
593 	sp->buffsize	= len;  in sixpack_open()
594 	sp->rcount	= 0;  in sixpack_open()
595 	sp->rx_count	= 0;  in sixpack_open()
596 	sp->rx_count_cooked = 0;  in sixpack_open()
597 	sp->xleft	= 0;  in sixpack_open()
599 	sp->flags	= 0;		/* Clear ESCAPE & ERROR flags */  in sixpack_open()
601 	sp->duplex	= 0;  in sixpack_open()
602 	sp->tx_delay    = SIXP_TXDELAY;  in sixpack_open()
603 	sp->persistence = SIXP_PERSIST;  in sixpack_open()
604 	sp->slottime    = SIXP_SLOTTIME;  in sixpack_open()
605 	sp->led_state   = 0x60;  in sixpack_open()
606 	sp->status      = 1;  in sixpack_open()
607 	sp->status1     = 1;  in sixpack_open()
608 	sp->status2     = 0;  in sixpack_open()
609 	sp->tx_enable   = 0;  in sixpack_open()
613 	timer_setup(&sp->tx_t, sp_xmit_on_air, 0);  in sixpack_open()
615 	timer_setup(&sp->resync_t, resync_tnc, 0);  in sixpack_open()
617 	spin_unlock_bh(&sp->lock);  in sixpack_open()
620 	tty->disc_data = sp;  in sixpack_open()
628 	tnc_init(sp);  in sixpack_open()
651 	struct sixpack *sp;  in sixpack_close()  local
654 	sp = tty->disc_data;  in sixpack_close()
657 	if (!sp)  in sixpack_close()
664 	if (!refcount_dec_and_test(&sp->refcnt))  in sixpack_close()
665 		wait_for_completion(&sp->dead);  in sixpack_close()
671 	netif_stop_queue(sp->dev);  in sixpack_close()
673 	unregister_netdev(sp->dev);  in sixpack_close()
675 	del_timer_sync(&sp->tx_t);  in sixpack_close()
676 	del_timer_sync(&sp->resync_t);  in sixpack_close()
679 	kfree(sp->rbuff);  in sixpack_close()
680 	kfree(sp->xbuff);  in sixpack_close()
682 	free_netdev(sp->dev);  in sixpack_close()
689 	struct sixpack *sp = sp_get(tty);  in sixpack_ioctl()  local
693 	if (!sp)  in sixpack_ioctl()
695 	dev = sp->dev;  in sixpack_ioctl()
713 		sp->mode = tmp;  in sixpack_ioctl()
741 	sp_put(sp);  in sixpack_ioctl()
823 static void decode_data(struct sixpack *sp, unsigned char inbyte)  in decode_data()  argument
827 	if (sp->rx_count != 3) {  in decode_data()
828 		sp->raw_buf[sp->rx_count++] = inbyte;  in decode_data()
833 	if (sp->rx_count_cooked + 2 >= sizeof(sp->cooked_buf)) {  in decode_data()
835 		sp->rx_count = 0;  in decode_data()
839 	buf = sp->raw_buf;  in decode_data()
840 	sp->cooked_buf[sp->rx_count_cooked++] =  in decode_data()
842 	sp->cooked_buf[sp->rx_count_cooked++] =  in decode_data()
844 	sp->cooked_buf[sp->rx_count_cooked++] =  in decode_data()
846 	sp->rx_count = 0;  in decode_data()
851 static void decode_prio_command(struct sixpack *sp, unsigned char cmd)  in decode_prio_command()  argument
864 		if (((sp->status & SIXP_DCD_MASK) == 0) &&  in decode_prio_command()
866 				if (sp->status != 1)  in decode_prio_command()
869 					sp->status = 0;  in decode_prio_command()
872 		sp->status = cmd & SIXP_PRIO_DATA_MASK;  in decode_prio_command()
874 		if ((sp->status2 != 0) && (sp->duplex == 1)) {  in decode_prio_command()
875 			sp->led_state = 0x70;  in decode_prio_command()
876 			sp->tty->ops->write(sp->tty, &sp->led_state, 1);  in decode_prio_command()
877 			sp->tx_enable = 1;  in decode_prio_command()
878 			actual = sp->tty->ops->write(sp->tty, sp->xbuff, sp->status2);  in decode_prio_command()
879 			sp->xleft -= actual;  in decode_prio_command()
880 			sp->xhead += actual;  in decode_prio_command()
881 			sp->led_state = 0x60;  in decode_prio_command()
882 			sp->status2 = 0;  in decode_prio_command()
888 	sp->tty->ops->write(sp->tty, &sp->led_state, 1);  in decode_prio_command()
893 	if (sp->tnc_state == TNC_IN_SYNC)  in decode_prio_command()
894 		mod_timer(&sp->resync_t, jiffies + SIXP_INIT_RESYNC_TIMEOUT);  in decode_prio_command()
896 	sp->status1 = cmd & SIXP_PRIO_DATA_MASK;  in decode_prio_command()
901 static void decode_std_command(struct sixpack *sp, unsigned char cmd)  in decode_std_command()  argument
908 		if ((sp->rx_count == 0) && (sp->rx_count_cooked == 0)) {  in decode_std_command()
909 			if ((sp->status & SIXP_RX_DCD_MASK) ==  in decode_std_command()
911 				sp->led_state = 0x68;  in decode_std_command()
912 				sp->tty->ops->write(sp->tty, &sp->led_state, 1);  in decode_std_command()
915 			sp->led_state = 0x60;  in decode_std_command()
917 			sp->tty->ops->write(sp->tty, &sp->led_state, 1);  in decode_std_command()
918 			spin_lock_bh(&sp->rxlock);  in decode_std_command()
919 			rest = sp->rx_count;  in decode_std_command()
922 					decode_data(sp, 0);  in decode_std_command()
924 				sp->rx_count_cooked -= 2;  in decode_std_command()
926 				sp->rx_count_cooked -= 1;  in decode_std_command()
927 			for (i = 0; i < sp->rx_count_cooked; i++)  in decode_std_command()
928 				checksum += sp->cooked_buf[i];  in decode_std_command()
932 				sp->rcount = sp->rx_count_cooked-2;  in decode_std_command()
933 				sp_bump(sp, 0);  in decode_std_command()
935 			sp->rx_count_cooked = 0;  in decode_std_command()
936 			spin_unlock_bh(&sp->rxlock);  in decode_std_command()
951 sixpack_decode(struct sixpack *sp, const unsigned char *pre_rbuff, int count)  in sixpack_decode()  argument
959 			tnc_set_sync_state(sp, TNC_IN_SYNC);  in sixpack_decode()
960 			del_timer(&sp->resync_t);  in sixpack_decode()
963 			decode_prio_command(sp, inbyte);  in sixpack_decode()
965 			decode_std_command(sp, inbyte);  in sixpack_decode()
966 		else if ((sp->status & SIXP_RX_DCD_MASK) == SIXP_RX_DCD_MASK) {  in sixpack_decode()
967 			spin_lock_bh(&sp->rxlock);  in sixpack_decode()
968 			decode_data(sp, inbyte);  in sixpack_decode()
969 			spin_unlock_bh(&sp->rxlock);  in sixpack_decode()