2 ** -----------------------------------------------------------------------------
4 ** Perle Specialix driver for Linux
5 ** Ported from existing RIO Driver for SCO sources.
7 * (C) 1990 - 2000 Specialix International Ltd., Byfleet, Surrey, UK.
9 * This program is free software; you can redistribute it and/or modify
10 * it under the terms of the GNU General Public License as published by
11 * the Free Software Foundation; either version 2 of the License, or
12 * (at your option) any later version.
14 * This program is distributed in the hope that it will be useful,
15 * but WITHOUT ANY WARRANTY; without even the implied warranty of
16 * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
17 * GNU General Public License for more details.
19 * You should have received a copy of the GNU General Public License
20 * along with this program; if not, write to the Free Software
21 * Foundation, Inc., 675 Mass Ave, Cambridge, MA 02139, USA.
23 ** Module : rioparam.c
25 ** Last Modified : 11/6/98 10:33:45
26 ** Retrieved : 11/6/98 10:33:50
28 ** ident @(#)rioparam.c 1.3
30 ** -----------------------------------------------------------------------------
34 static char *_rioparam_c_sccs_ = "@(#)rioparam.c 1.3";
37 #include <linux/module.h>
38 #include <linux/slab.h>
39 #include <linux/errno.h>
40 #include <linux/tty.h>
42 #include <asm/system.h>
43 #include <asm/string.h>
44 #include <asm/semaphore.h>
45 #include <asm/uaccess.h>
47 #include <linux/termios.h>
48 #include <linux/serial.h>
50 #include <linux/generic_serial.h>
53 #include "linux_compat.h"
54 #include "rio_linux.h"
91 ** The Scam, based on email from jeremyr@bugs.specialix.co.uk....
93 ** To send a command on a particular port, you put a packet with the
94 ** command bit set onto the port. The command bit is in the len field,
95 ** and gets ORed in with the actual byte count.
97 ** When you send a packet with the command bit set, then the first
98 ** data byte ( data[0] ) is interpretted as the command to execute.
99 ** It also governs what data structure overlay should accompany the packet.
100 ** Commands are defined in cirrus/cirrus.h
102 ** If you want the command to pre-emt data already on the queue for the
103 ** port, set the pre-emptive bit in conjunction with the command bit.
104 ** It is not defined what will happen if you set the preemptive bit
105 ** on a packet that is NOT a command.
107 ** Pre-emptive commands should be queued at the head of the queue using
108 ** add_start(), whereas normal commands and data are enqueued using
111 ** Most commands do not use the remaining bytes in the data array. The
112 ** exceptions are OPEN MOPEN and CONFIG. (NB. As with the SI CONFIG and
113 ** OPEN are currently analagous). With these three commands the following
114 ** 11 data bytes are all used to pass config information such as baud rate etc.
115 ** The fields are also defined in cirrus.h. Some contain straightforward
116 ** information such as the transmit XON character. Two contain the transmit and
117 ** receive baud rates respectively. For most baud rates there is a direct
118 ** mapping between the rates defined in <sys/termio.h> and the byte in the
119 ** packet. There are additional (non UNIX-standard) rates defined in
120 ** /u/dos/rio/cirrus/h/brates.h.
122 ** The rest of the data fields contain approximations to the Cirrus registers
123 ** that are used to program number of bits etc. Each registers bit fields is
124 ** defined in cirrus.h.
126 ** NB. Only use those bits that are defined as being driver specific
127 ** or common to the RTA and the driver.
129 ** All commands going from RTA->Host will be dealt with by the Host code - you
130 ** will never see them. As with the SI there will be three fields to look out
131 ** for in each phb (not yet defined - needs defining a.s.a.p).
133 ** modem_status - current state of handshake pins.
135 ** port_status - current port status - equivalent to hi_stat for SI, indicates
136 ** if port is IDLE_OPEN, IDLE_CLOSED etc.
138 ** break_status - bit X set if break has been received.
145 ** RIOParam is used to open or configure a port. You pass it a PortP,
146 ** which will have a tty struct attached to it. You also pass a command,
147 ** either OPEN or CONFIG. The port's setup is taken from the t_ fields
148 ** of the tty struct inside the PortP, and the port is either opened
149 ** or re-configured. You must also tell RIOParam if the device is a modem
150 ** device or not (i.e. top bit of minor number set or clear - take special
151 ** care when deciding on this!).
152 ** RIOParam neither flushes nor waits for drain, and is NOT preemptive.
154 ** RIOParam assumes it will be called at splrio(), and also assumes
155 ** that CookMode is set correctly in the port structure.
158 ** tty lock must NOT have been previously acquired.
160 int RIOParam(PortP, cmd, Modem, SleepFlag)
166 register struct tty_struct *TtyP;
168 register struct phb_param *phb_param_ptr;
171 uchar Cor1 = 0, Cor2 = 0, Cor4 = 0, Cor5 = 0;
172 uchar TxXon = 0, TxXoff = 0, RxXon = 0, RxXoff = 0;
173 uchar LNext = 0, TxBaud = 0, RxBaud = 0;
179 TtyP = PortP->gs.tty;
181 rio_dprintk(RIO_DEBUG_PARAM, "RIOParam: Port:%d cmd:%d Modem:%d SleepFlag:%d Mapped: %d, tty=%p\n", PortP->PortNum, cmd, Modem, SleepFlag, PortP->Mapped, TtyP);
184 rio_dprintk(RIO_DEBUG_PARAM, "Can't call rioparam with null tty.\n");
190 rio_spin_lock_irqsave(&PortP->portSem, flags);
194 ** If the port is set to store or lock the parameters, and it is
195 ** paramed with OPEN, we want to restore the saved port termio, but
196 ** only if StoredTermio has been saved, i.e. NOT 1st open after reboot.
199 if (PortP->FirstOpen) {
200 PortP->StoredTty.iflag = TtyP->tm.c_iflag;
201 PortP->StoredTty.oflag = TtyP->tm.c_oflag;
202 PortP->StoredTty.cflag = TtyP->tm.c_cflag;
203 PortP->StoredTty.lflag = TtyP->tm.c_lflag;
204 PortP->StoredTty.line = TtyP->tm.c_line;
205 for (i = 0; i < NCC + 5; i++)
206 PortP->StoredTty.cc[i] = TtyP->tm.c_cc[i];
207 PortP->FirstOpen = 0;
208 } else if (PortP->Store || PortP->Lock) {
209 rio_dprintk(RIO_DEBUG_PARAM, "OPEN: Restoring stored/locked params\n");
210 TtyP->tm.c_iflag = PortP->StoredTty.iflag;
211 TtyP->tm.c_oflag = PortP->StoredTty.oflag;
212 TtyP->tm.c_cflag = PortP->StoredTty.cflag;
213 TtyP->tm.c_lflag = PortP->StoredTty.lflag;
214 TtyP->tm.c_line = PortP->StoredTty.line;
215 for (i = 0; i < NCC + 5; i++)
216 TtyP->tm.c_cc[i] = PortP->StoredTty.cc[i];
224 while (!(res = can_add_transmit(&PacketP, PortP)) || (PortP->InUse != NOT_INUSE)) {
225 if (retries-- <= 0) {
228 if (PortP->InUse != NOT_INUSE) {
229 rio_dprintk(RIO_DEBUG_PARAM, "Port IN_USE for pre-emptive command\n");
233 rio_dprintk(RIO_DEBUG_PARAM, "Port has no space on transmit queue\n");
236 if (SleepFlag != OK_TO_SLEEP) {
237 rio_spin_unlock_irqrestore(&PortP->portSem, flags);
243 rio_dprintk(RIO_DEBUG_PARAM, "wait for can_add_transmit\n");
244 rio_spin_unlock_irqrestore(&PortP->portSem, flags);
245 retval = RIODelay(PortP, HUNDRED_MS);
246 rio_spin_lock_irqsave(&PortP->portSem, flags);
247 if (retval == RIO_FAIL) {
248 rio_dprintk(RIO_DEBUG_PARAM, "wait for can_add_transmit broken by signal\n");
249 rio_spin_unlock_irqrestore(&PortP->portSem, flags);
255 if (PortP->State & RIO_DELETED) {
256 rio_spin_unlock_irqrestore(&PortP->portSem, flags);
264 rio_spin_unlock_irqrestore(&PortP->portSem, flags);
270 rio_dprintk(RIO_DEBUG_PARAM, "can_add_transmit() returns %x\n", res);
271 rio_dprintk(RIO_DEBUG_PARAM, "Packet is 0x%x\n", (int) PacketP);
273 phb_param_ptr = (struct phb_param *) PacketP->data;
280 if (TtyP->tm.c_iflag & INPCK) {
281 rio_dprintk(RIO_DEBUG_PARAM, "Parity checking on input enabled\n");
286 switch (TtyP->termios->c_cflag & CSIZE) {
289 rio_dprintk(RIO_DEBUG_PARAM, "5 bit data\n");
295 rio_dprintk(RIO_DEBUG_PARAM, "6 bit data\n");
301 rio_dprintk(RIO_DEBUG_PARAM, "7 bit data\n");
307 rio_dprintk(RIO_DEBUG_PARAM, "8 bit data\n");
313 if (TtyP->termios->c_cflag & CSTOPB) {
314 rio_dprintk(RIO_DEBUG_PARAM, "2 stop bits\n");
317 rio_dprintk(RIO_DEBUG_PARAM, "1 stop bit\n");
321 if (TtyP->termios->c_cflag & PARENB) {
322 rio_dprintk(RIO_DEBUG_PARAM, "Enable parity\n");
325 rio_dprintk(RIO_DEBUG_PARAM, "Disable parity\n");
328 if (TtyP->termios->c_cflag & PARODD) {
329 rio_dprintk(RIO_DEBUG_PARAM, "Odd parity\n");
332 rio_dprintk(RIO_DEBUG_PARAM, "Even parity\n");
339 if (TtyP->termios->c_iflag & IXON) {
340 rio_dprintk(RIO_DEBUG_PARAM, "Enable start/stop output control\n");
343 if (PortP->Config & RIO_IXON) {
344 rio_dprintk(RIO_DEBUG_PARAM, "Force enable start/stop output control\n");
347 rio_dprintk(RIO_DEBUG_PARAM, "IXON has been disabled.\n");
350 if (TtyP->termios->c_iflag & IXANY) {
351 if (PortP->Config & RIO_IXANY) {
352 rio_dprintk(RIO_DEBUG_PARAM, "Enable any key to restart output\n");
355 rio_dprintk(RIO_DEBUG_PARAM, "IXANY has been disabled due to sanity reasons.\n");
358 if (TtyP->termios->c_iflag & IXOFF) {
359 rio_dprintk(RIO_DEBUG_PARAM, "Enable start/stop input control 2\n");
363 if (TtyP->termios->c_cflag & HUPCL) {
364 rio_dprintk(RIO_DEBUG_PARAM, "Hangup on last close\n");
368 if (C_CRTSCTS(TtyP)) {
369 rio_dprintk(RIO_DEBUG_PARAM, "Rx hardware flow control enabled\n");
370 Cor2 |= COR2_CTSFLOW;
371 Cor2 |= COR2_RTSFLOW;
373 rio_dprintk(RIO_DEBUG_PARAM, "Rx hardware flow control disabled\n");
374 Cor2 &= ~COR2_CTSFLOW;
375 Cor2 &= ~COR2_RTSFLOW;
379 if (TtyP->termios->c_cflag & CLOCAL) {
380 rio_dprintk(RIO_DEBUG_PARAM, "Local line\n");
382 rio_dprintk(RIO_DEBUG_PARAM, "Possible Modem line\n");
386 ** COR 4 (there is no COR 3)
388 if (TtyP->termios->c_iflag & IGNBRK) {
389 rio_dprintk(RIO_DEBUG_PARAM, "Ignore break condition\n");
392 if (!(TtyP->termios->c_iflag & BRKINT)) {
393 rio_dprintk(RIO_DEBUG_PARAM, "Break generates NULL condition\n");
394 Cor4 |= COR4_NBRKINT;
396 rio_dprintk(RIO_DEBUG_PARAM, "Interrupt on break condition\n");
399 if (TtyP->termios->c_iflag & INLCR) {
400 rio_dprintk(RIO_DEBUG_PARAM, "Map newline to carriage return on input\n");
404 if (TtyP->termios->c_iflag & IGNCR) {
405 rio_dprintk(RIO_DEBUG_PARAM, "Ignore carriage return on input\n");
409 if (TtyP->termios->c_iflag & ICRNL) {
410 rio_dprintk(RIO_DEBUG_PARAM, "Map carriage return to newline on input\n");
413 if (TtyP->termios->c_iflag & IGNPAR) {
414 rio_dprintk(RIO_DEBUG_PARAM, "Ignore characters with parity errors\n");
417 if (TtyP->termios->c_iflag & PARMRK) {
418 rio_dprintk(RIO_DEBUG_PARAM, "Mark parity errors\n");
423 ** Set the RAISEMOD flag to ensure that the modem lines are raised
424 ** on reception of a config packet.
425 ** The download code handles the zero baud condition.
427 Cor4 |= COR4_RAISEMOD;
436 ** Set to monitor tbusy/tstop (or not).
439 if (PortP->MonitorTstate)
440 Cor5 |= COR5_TSTATE_ON;
442 Cor5 |= COR5_TSTATE_OFF;
445 ** Could set LNE here if you wanted LNext processing. SVR4 will use it.
447 if (TtyP->termios->c_iflag & ISTRIP) {
448 rio_dprintk(RIO_DEBUG_PARAM, "Strip input characters\n");
449 if (!(PortP->State & RIO_TRIAD_MODE)) {
454 if (TtyP->termios->c_oflag & ONLCR) {
455 rio_dprintk(RIO_DEBUG_PARAM, "Map newline to carriage-return, newline on output\n");
456 if (PortP->CookMode == COOK_MEDIUM)
459 if (TtyP->termios->c_oflag & OCRNL) {
460 rio_dprintk(RIO_DEBUG_PARAM, "Map carriage return to newline on output\n");
461 if (PortP->CookMode == COOK_MEDIUM)
464 if ((TtyP->termios->c_oflag & TABDLY) == TAB3) {
465 rio_dprintk(RIO_DEBUG_PARAM, "Tab delay 3 set\n");
466 if (PortP->CookMode == COOK_MEDIUM)
471 ** Flow control bytes.
473 TxXon = TtyP->termios->c_cc[VSTART];
474 TxXoff = TtyP->termios->c_cc[VSTOP];
475 RxXon = TtyP->termios->c_cc[VSTART];
476 RxXoff = TtyP->termios->c_cc[VSTOP];
485 rio_dprintk(RIO_DEBUG_PARAM, "Mapping of rx/tx baud %x (%x)\n", TtyP->termios->c_cflag, CBAUD);
487 switch (TtyP->termios->c_cflag & CBAUD) {
488 #define e(b) case B ## b : RxBaud = TxBaud = RIO_B ## b ;break
505 e(115200); /* e(230400);e(460800); e(921600); */
508 /* XXX MIssing conversion table. XXX */
509 /* (TtyP->termios->c_cflag & V_CBAUD); */
511 rio_dprintk(RIO_DEBUG_PARAM, "tx baud 0x%x, rx baud 0x%x\n", TxBaud, RxBaud);
517 if (TtyP->termios->c_cflag & CREAD)
518 rio_dprintk(RIO_DEBUG_PARAM, "Enable receiver\n");
520 if (TtyP->termios->c_cflag & RCV1EN)
521 rio_dprintk(RIO_DEBUG_PARAM, "RCV1EN (?)\n");
524 if (TtyP->termios->c_cflag & XMT1EN)
525 rio_dprintk(RIO_DEBUG_PARAM, "XMT1EN (?)\n");
528 if (TtyP->termios->c_cflag & LOBLK)
529 rio_dprintk(RIO_DEBUG_PARAM, "LOBLK - JCL output blocks when not current\n");
531 if (TtyP->termios->c_lflag & ISIG)
532 rio_dprintk(RIO_DEBUG_PARAM, "Input character signal generating enabled\n");
533 if (TtyP->termios->c_lflag & ICANON)
534 rio_dprintk(RIO_DEBUG_PARAM, "Canonical input: erase and kill enabled\n");
535 if (TtyP->termios->c_lflag & XCASE)
536 rio_dprintk(RIO_DEBUG_PARAM, "Canonical upper/lower presentation\n");
537 if (TtyP->termios->c_lflag & ECHO)
538 rio_dprintk(RIO_DEBUG_PARAM, "Enable input echo\n");
539 if (TtyP->termios->c_lflag & ECHOE)
540 rio_dprintk(RIO_DEBUG_PARAM, "Enable echo erase\n");
541 if (TtyP->termios->c_lflag & ECHOK)
542 rio_dprintk(RIO_DEBUG_PARAM, "Enable echo kill\n");
543 if (TtyP->termios->c_lflag & ECHONL)
544 rio_dprintk(RIO_DEBUG_PARAM, "Enable echo newline\n");
545 if (TtyP->termios->c_lflag & NOFLSH)
546 rio_dprintk(RIO_DEBUG_PARAM, "Disable flush after interrupt or quit\n");
548 if (TtyP->termios->c_lflag & TOSTOP)
549 rio_dprintk(RIO_DEBUG_PARAM, "Send SIGTTOU for background output\n");
552 if (TtyP->termios->c_lflag & XCLUDE)
553 rio_dprintk(RIO_DEBUG_PARAM, "Exclusive use of this line\n");
555 if (TtyP->termios->c_iflag & IUCLC)
556 rio_dprintk(RIO_DEBUG_PARAM, "Map uppercase to lowercase on input\n");
557 if (TtyP->termios->c_oflag & OPOST)
558 rio_dprintk(RIO_DEBUG_PARAM, "Enable output post-processing\n");
559 if (TtyP->termios->c_oflag & OLCUC)
560 rio_dprintk(RIO_DEBUG_PARAM, "Map lowercase to uppercase on output\n");
561 if (TtyP->termios->c_oflag & ONOCR)
562 rio_dprintk(RIO_DEBUG_PARAM, "No carriage return output at column 0\n");
563 if (TtyP->termios->c_oflag & ONLRET)
564 rio_dprintk(RIO_DEBUG_PARAM, "Newline performs carriage return function\n");
565 if (TtyP->termios->c_oflag & OFILL)
566 rio_dprintk(RIO_DEBUG_PARAM, "Use fill characters for delay\n");
567 if (TtyP->termios->c_oflag & OFDEL)
568 rio_dprintk(RIO_DEBUG_PARAM, "Fill character is DEL\n");
569 if (TtyP->termios->c_oflag & NLDLY)
570 rio_dprintk(RIO_DEBUG_PARAM, "Newline delay set\n");
571 if (TtyP->termios->c_oflag & CRDLY)
572 rio_dprintk(RIO_DEBUG_PARAM, "Carriage return delay set\n");
573 if (TtyP->termios->c_oflag & TABDLY)
574 rio_dprintk(RIO_DEBUG_PARAM, "Tab delay set\n");
576 if (TtyP->termios->c_oflag & BSDLY)
577 rio_dprintk(RIO_DEBUG_PARAM, "Back-space delay set\n");
578 if (TtyP->termios->c_oflag & VTDLY)
579 rio_dprintk(RIO_DEBUG_PARAM, "Vertical tab delay set\n");
580 if (TtyP->termios->c_oflag & FFDLY)
581 rio_dprintk(RIO_DEBUG_PARAM, "Form-feed delay set\n");
584 ** These things are kind of useful in a later life!
586 PortP->Cor2Copy = Cor2;
588 if (PortP->State & RIO_DELETED) {
589 rio_spin_unlock_irqrestore(&PortP->portSem, flags);
596 ** Actually write the info into the packet to be sent
598 WBYTE(phb_param_ptr->Cmd, cmd);
599 WBYTE(phb_param_ptr->Cor1, Cor1);
600 WBYTE(phb_param_ptr->Cor2, Cor2);
601 WBYTE(phb_param_ptr->Cor4, Cor4);
602 WBYTE(phb_param_ptr->Cor5, Cor5);
603 WBYTE(phb_param_ptr->TxXon, TxXon);
604 WBYTE(phb_param_ptr->RxXon, RxXon);
605 WBYTE(phb_param_ptr->TxXoff, TxXoff);
606 WBYTE(phb_param_ptr->RxXoff, RxXoff);
607 WBYTE(phb_param_ptr->LNext, LNext);
608 WBYTE(phb_param_ptr->TxBaud, TxBaud);
609 WBYTE(phb_param_ptr->RxBaud, RxBaud);
612 ** Set the length/command field
614 WBYTE(PacketP->len, 12 | PKT_CMD_BIT);
617 ** The packet is formed - now, whack it off
618 ** to its final destination:
622 ** Count characters transmitted for port statistics reporting
624 if (PortP->statsGather)
625 PortP->txchars += 12;
627 rio_spin_unlock_irqrestore(&PortP->portSem, flags);
629 rio_dprintk(RIO_DEBUG_PARAM, "add_transmit returned.\n");
640 ** We can add another packet to a transmit queue if the packet pointer pointed
641 ** to by the TxAdd pointer has PKT_IN_USE clear in its address.
643 int can_add_transmit(PktP, PortP)
649 *PktP = tp = (PKT *) RIO_PTR(PortP->Caddr, RWORD(*PortP->TxAdd));
651 return !((uint) tp & PKT_IN_USE);
655 ** To add a packet to the queue, you set the PKT_IN_USE bit in the address,
656 ** and then move the TxAdd pointer along one position to point to the next
657 ** packet pointer. You must wrap the pointer from the end back to the start.
659 void add_transmit(PortP)
662 if (RWORD(*PortP->TxAdd) & PKT_IN_USE) {
663 rio_dprintk(RIO_DEBUG_PARAM, "add_transmit: Packet has been stolen!");
665 WWORD(*(ushort *) PortP->TxAdd, RWORD(*PortP->TxAdd) | PKT_IN_USE);
666 PortP->TxAdd = (PortP->TxAdd == PortP->TxEnd) ? PortP->TxStart : PortP->TxAdd + 1;
667 WWORD(PortP->PhbP->tx_add, RIO_OFF(PortP->Caddr, PortP->TxAdd));
670 /****************************************
671 * Put a packet onto the end of the
673 ****************************************/
674 void put_free_end(HostP, PktP)
678 FREE_LIST *tmp_pointer;
679 ushort old_end, new_end;
682 rio_spin_lock_irqsave(&HostP->HostLock, flags);
684 /*************************************************
685 * Put a packet back onto the back of the free list
687 ************************************************/
689 rio_dprintk(RIO_DEBUG_PFE, "put_free_end(PktP=%x)\n", (int) PktP);
691 if ((old_end = RWORD(HostP->ParmMapP->free_list_end)) != TPNULL) {
692 new_end = RIO_OFF(HostP->Caddr, PktP);
693 tmp_pointer = (FREE_LIST *) RIO_PTR(HostP->Caddr, old_end);
694 WWORD(tmp_pointer->next, new_end);
695 WWORD(((FREE_LIST *) PktP)->prev, old_end);
696 WWORD(((FREE_LIST *) PktP)->next, TPNULL);
697 WWORD(HostP->ParmMapP->free_list_end, new_end);
698 } else { /* First packet on the free list this should never happen! */
699 rio_dprintk(RIO_DEBUG_PFE, "put_free_end(): This should never happen\n");
700 WWORD(HostP->ParmMapP->free_list_end, RIO_OFF(HostP->Caddr, PktP));
701 tmp_pointer = (FREE_LIST *) PktP;
702 WWORD(tmp_pointer->prev, TPNULL);
703 WWORD(tmp_pointer->next, TPNULL);
705 rio_dprintk(RIO_DEBUG_CMD, "Before unlock: %p\n", &HostP->HostLock);
706 rio_spin_unlock_irqrestore(&HostP->HostLock, flags);
710 ** can_remove_receive(PktP,P) returns non-zero if PKT_IN_USE is set
711 ** for the next packet on the queue. It will also set PktP to point to the
712 ** relevant packet, [having cleared the PKT_IN_USE bit]. If PKT_IN_USE is clear,
713 ** then can_remove_receive() returns 0.
715 int can_remove_receive(PktP, PortP)
719 if (RWORD(*PortP->RxRemove) & PKT_IN_USE) {
720 *PktP = (PKT *) RIO_PTR(PortP->Caddr, RWORD(*PortP->RxRemove) & ~PKT_IN_USE);
727 ** To remove a packet from the receive queue you clear its PKT_IN_USE bit,
728 ** and then bump the pointers. Once the pointers get to the end, they must
729 ** be wrapped back to the start.
731 void remove_receive(PortP)
734 WWORD(*PortP->RxRemove, RWORD(*PortP->RxRemove) & ~PKT_IN_USE);
735 PortP->RxRemove = (PortP->RxRemove == PortP->RxEnd) ? PortP->RxStart : PortP->RxRemove + 1;
736 WWORD(PortP->PhbP->rx_remove, RIO_OFF(PortP->Caddr, PortP->RxRemove));