2 * cyclades cyclom-y serial driver
3 * Andrew Herbert <andrew@werple.apana.org.au>, 17 August 1993
5 * Copyright (c) 1993 Andrew Herbert.
8 * Redistribution and use in source and binary forms, with or without
9 * modification, are permitted provided that the following conditions
11 * 1. Redistributions of source code must retain the above copyright
12 * notice, this list of conditions and the following disclaimer.
13 * 2. Redistributions in binary form must reproduce the above copyright
14 * notice, this list of conditions and the following disclaimer in the
15 * documentation and/or other materials provided with the distribution.
16 * 3. The name Andrew Herbert may not be used to endorse or promote products
17 * derived from this software without specific prior written permission.
19 * THIS SOFTWARE IS PROVIDED BY ``AS IS'' AND ANY EXPRESS OR IMPLIED
20 * WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED WARRANTIES OF
21 * MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE DISCLAIMED. IN
22 * NO EVENT SHALL I BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL,
23 * EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO,
24 * PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR
25 * PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF
26 * LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING
27 * NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF THIS
28 * SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
30 * $FreeBSD: src/sys/i386/isa/cy.c,v 1.97.2.2 2001/08/22 13:04:58 bde Exp $
31 * $DragonFly: src/sys/dev/serial/cy/cy.c,v 1.21 2006/09/05 00:55:42 dillon Exp $
34 #include "opt_compat.h"
44 * Temporary compile-time configuration options.
46 #define RxFifoThreshold (CD1400_RX_FIFO_SIZE / 2)
47 /* Number of chars in the receiver FIFO before an
48 * an interrupt is generated. Should depend on
49 * line speed. Needs to be about 6 on a 486DX33
50 * for 4 active ports at 115200 bps. Why doesn't
53 #define PollMode /* Use polling-based irq service routine, not the
54 * hardware svcack lines. Must be defined for
55 * Cyclom-16Y boards. Less efficient for Cyclom-8Ys,
56 * and stops 4 * 115200 bps from working.
58 #undef Smarts /* Enable slightly more CD1400 intelligence. Mainly
59 * the output CR/LF processing, plus we can avoid a
60 * few checks usually done in ttyinput().
62 * XXX not fully implemented, and not particularly
65 #undef CyDebug /* Include debugging code (not very expensive). */
67 /* These will go away. */
71 #include <sys/param.h>
72 #include <sys/systm.h>
76 #include <sys/dkstat.h>
77 #include <sys/fcntl.h>
78 #include <sys/interrupt.h>
79 #include <sys/kernel.h>
80 #include <sys/malloc.h>
81 #include <sys/syslog.h>
82 #include <sys/thread2.h>
83 #include <machine/clock.h>
84 #include <machine/ipl.h>
86 #include <machine/lock.h>
88 #include <machine/psl.h>
90 #include <bus/isa/i386/isa_device.h>
92 #include <i386/isa/ic/cd1400.h>
95 #define disable_intr() com_lock()
96 #define enable_intr() com_unlock()
100 * Dictionary so that I can name everything *sio* or *com* to compare with
101 * sio.c. There is also lots of ugly formatting and unnecessary ifdefs to
102 * simplify the comparision. These will go away.
104 #define LSR_BI CD1400_RDSR_BREAK
105 #define LSR_FE CD1400_RDSR_FE
106 #define LSR_OE CD1400_RDSR_OE
107 #define LSR_PE CD1400_RDSR_PE
108 #define MCR_DTR CD1400_MSVR2_DTR
109 #define MCR_RTS CD1400_MSVR1_RTS
110 #define MSR_CTS CD1400_MSVR2_CTS
111 #define MSR_DCD CD1400_MSVR2_CD
112 #define MSR_DSR CD1400_MSVR2_DSR
113 #define MSR_RI CD1400_MSVR2_RI
114 #define NSIO (NCY * CY_MAX_PORTS)
115 #define comconsole cyconsole
116 #define comdefaultrate cydefaultrate
117 #define com_events cy_events
118 #define comhardclose cyhardclose
119 #define commctl cymctl
120 #define comparam cyparam
121 #define comspeed cyspeed
122 #define comstart cystart
123 #define comwakeup cywakeup
124 #define nsio_tty ncy_tty
125 #define p_com_addr p_cy_addr
126 #define sioattach cyattach
127 #define sioclose cyclose
128 #define siodriver cydriver
129 #define siodtrwakeup cydtrwakeup
130 #define sioinput cyinput
131 #define siointr cyintr
132 #define siointr1 cyintr1
133 #define sioioctl cyioctl
134 #define sioopen cyopen
135 #define siopoll cypoll
136 #define sioprobe cyprobe
137 #define siosettimeout cysettimeout
138 #define siosetwater cysetwater
139 #define comstop cystop
140 #define siowrite cywrite
141 #define sio_registered cy_registered
142 #define sio_timeout cy_timeout
143 #define sio_timeout_handle cy_timeout_handle
144 #define sio_timeouts_until_log cy_timeouts_until_log
145 #define sio_tty cy_tty
147 #define CY_MAX_PORTS (CD1400_NO_OF_CHANNELS * CY_MAX_CD1400s)
149 /* We encode the cyclom unit number (cyu) in spare bits in the IVR's. */
150 #define CD1400_xIVR_CHAN_SHIFT 3
151 #define CD1400_xIVR_CHAN 0x1F
154 * ETC states. com->etc may also contain a hardware ETC command value,
155 * meaning that execution of that command is pending.
157 #define ETC_NONE 0 /* we depend on bzero() setting this */
158 #define ETC_BREAK_STARTING 1
159 #define ETC_BREAK_STARTED 2
160 #define ETC_BREAK_ENDING 3
161 #define ETC_BREAK_ENDED 4
163 #define LOTS_OF_EVENTS 64 /* helps separate urgent events from input */
165 #define CALLOUT_MASK 0x80
166 #define CONTROL_MASK 0x60
167 #define CONTROL_INIT_STATE 0x20
168 #define CONTROL_LOCK_STATE 0x40
169 #define DEV_TO_UNIT(dev) (MINOR_TO_UNIT(minor(dev)))
170 #define MINOR_MAGIC_MASK (CALLOUT_MASK | CONTROL_MASK)
172 * Not all of the magic is parametrized in the following macros. 16 and
173 * 0xff are related to the bitfields in a udev_t. CY_MAX_PORTS must be
174 * ((0xff & ~MINOR_MAGIC_MASK) + 1) for things to work.
176 #define MINOR_TO_UNIT(mynor) (((mynor) >> 16) * CY_MAX_PORTS \
177 | (((mynor) & 0xff) & ~MINOR_MAGIC_MASK))
178 #define UNIT_TO_MINOR(unit) (((unit) / CY_MAX_PORTS) << 16 \
179 | (((unit) & 0xff) & ~MINOR_MAGIC_MASK))
183 * (CS_BUSY | CS_TTGO) and (CS_BUSY | CS_TTGO | CS_ODEVREADY) must be higher
184 * than the other bits so that they can be tested as a group without masking
187 * The following com and tty flags correspond closely:
188 * CS_BUSY = TS_BUSY (maintained by comstart(), siopoll() and
190 * CS_TTGO = ~TS_TTSTOP (maintained by comparam() and comstart())
191 * CS_CTS_OFLOW = CCTS_OFLOW (maintained by comparam())
192 * CS_RTS_IFLOW = CRTS_IFLOW (maintained by comparam())
193 * TS_FLUSH is not used.
194 * XXX I think TIOCSETA doesn't clear TS_TTSTOP when it clears IXON.
195 * XXX CS_*FLOW should be CF_*FLOW in com->flags (control flags not state).
197 #define CS_BUSY 0x80 /* output in progress */
198 #define CS_TTGO 0x40 /* output not stopped by XOFF */
199 #define CS_ODEVREADY 0x20 /* external device h/w ready (CTS) */
200 #define CS_CHECKMSR 1 /* check of MSR scheduled */
201 #define CS_CTS_OFLOW 2 /* use CTS output flow control */
202 #define CS_DTR_OFF 0x10 /* DTR held off */
203 #define CS_ODONE 4 /* output completed */
204 #define CS_RTS_IFLOW 8 /* use RTS input flow control */
205 #define CSE_ODONE 1 /* output transmitted */
207 static char const * const error_desc[] = {
210 #define CE_INTERRUPT_BUF_OVERFLOW 1
211 "interrupt-level buffer overflow",
212 #define CE_TTY_BUF_OVERFLOW 2
213 "tty-level buffer overflow",
217 #define CE_RECORD(com, errnum) (++(com)->delta_error_counts[errnum])
219 /* types. XXX - should be elsewhere */
220 typedef u_char bool_t; /* boolean */
221 typedef u_char volatile *cy_addr;
223 /* queue of linear buffers */
225 u_char *l_head; /* next char to process */
226 u_char *l_tail; /* one past the last char to process */
227 struct lbq *l_next; /* next in queue */
228 bool_t l_queued; /* nonzero if queued */
231 /* com device structure */
233 u_char state; /* miscellaneous flag bits */
234 bool_t active_out; /* nonzero if the callout device is open */
236 u_char cfcr_image; /* copy of value written to CFCR */
238 u_char etc; /* pending Embedded Transmit Command */
239 u_char extra_state; /* more flag bits, separate for order trick */
241 u_char fifo_image; /* copy of value written to FIFO */
243 u_char gfrcr_image; /* copy of value read from GFRCR */
245 bool_t hasfifo; /* nonzero for 16550 UARTs */
246 bool_t loses_outints; /* nonzero if device loses output interrupts */
248 u_char mcr_dtr; /* MCR bit that is wired to DTR */
249 u_char mcr_image; /* copy of value written to MCR */
250 u_char mcr_rts; /* MCR bit that is wired to RTS */
253 bool_t multiport; /* is this unit part of a multiport device? */
254 #endif /* COM_MULTIPORT */
255 bool_t no_irq; /* nonzero if irq is not attached */
256 bool_t poll; /* nonzero if polling is required */
257 bool_t poll_output; /* nonzero if polling for output is required */
259 int unit; /* unit number */
260 int dtr_wait; /* time to hold DTR down on close (* 1/hz) */
261 struct callout dtr_ch;
265 u_int wopeners; /* # processes waiting for DCD in open() */
268 * The high level of the driver never reads status registers directly
269 * because there would be too many side effects to handle conveniently.
270 * Instead, it reads copies of the registers stored here by the
273 u_char last_modem_status; /* last MSR read by intr handler */
274 u_char prev_modem_status; /* last MSR handled by high level */
276 u_char hotchar; /* ldisc-specific char to be handled ASAP */
277 u_char *ibuf; /* start of input buffer */
278 u_char *ibufend; /* end of input buffer */
279 u_char *ibufold; /* old input buffer, to be freed */
280 u_char *ihighwater; /* threshold in input buffer */
281 u_char *iptr; /* next free spot in input buffer */
282 int ibufsize; /* size of ibuf (not include error bytes) */
283 int ierroff; /* offset of error bytes in ibuf */
285 struct lbq obufq; /* head of queue of output buffers */
286 struct lbq obufs[2]; /* output buffers */
288 int cy_align; /* index for register alignment */
289 cy_addr cy_iobase; /* base address of this port's cyclom */
290 cy_addr iobase; /* base address of this port's cd1400 */
291 int mcr_rts_reg; /* cd1400 reg number of reg holding mcr_rts */
293 struct tty *tp; /* cross reference */
296 struct termios it_in; /* should be in struct tty */
297 struct termios it_out;
300 struct termios lt_in; /* should be in struct tty */
301 struct termios lt_out;
304 bool_t do_dcd_timestamp;
305 struct timeval timestamp;
306 struct timeval dcd_timestamp;
308 u_long bytes_in; /* statistics */
310 u_int delta_error_counts[CE_NTYPES];
311 u_long error_counts[CE_NTYPES];
313 u_int recv_exception; /* exception chars received */
314 u_int mdm; /* modem signal changes */
316 u_int start_count; /* no. of calls to comstart() */
317 u_int start_real; /* no. of calls that did something */
319 u_char car; /* CD1400 CAR shadow (if first unit in cd) */
320 u_char channel_control;/* CD1400 CCR control command shadow */
321 u_char cor[3]; /* CD1400 COR1-3 shadows */
322 u_char intr_enable; /* CD1400 SRER shadow */
325 * Data area for output buffers. Someday we should build the output
326 * buffer queue without copying data.
332 /* PCI driver entry point. */
333 int cyattach_common (cy_addr cy_iobase, int cy_align);
334 void siointr(void *);
336 static int cy_units (cy_addr cy_iobase, int cy_align);
337 static int sioattach (struct isa_device *dev);
338 static void cd1400_channel_cmd (struct com_s *com, int cmd);
339 static void cd1400_channel_cmd_wait (struct com_s *com);
340 static void cd_etc (struct com_s *com, int etc);
341 static int cd_getreg (struct com_s *com, int reg);
342 static void cd_setreg (struct com_s *com, int reg, int val);
343 static timeout_t siodtrwakeup;
344 static void comhardclose (struct com_s *com);
345 static void sioinput (struct com_s *com);
347 static void siointr1 (struct com_s *com);
349 static int commctl (struct com_s *com, int bits, int how);
350 static int comparam (struct tty *tp, struct termios *t);
351 static inthand2_t siopoll;
352 static int sioprobe (struct isa_device *dev);
353 static void siosettimeout (void);
354 static int siosetwater (struct com_s *com, speed_t speed);
355 static int comspeed (speed_t speed, u_long cy_clock,
357 static void comstart (struct tty *tp);
358 static void comstop (struct tty *tp, int rw);
359 static timeout_t comwakeup;
360 static void disc_optim (struct tty *tp, struct termios *t,
364 void cystatus (int unit);
367 static char driver_name[] = "cy";
369 /* table and macro for fast conversion from a unit number to its com struct */
370 static struct com_s *p_com_addr[NSIO];
371 #define com_addr(unit) (p_com_addr[unit])
373 struct isa_driver siodriver = {
374 sioprobe, sioattach, driver_name
377 static d_open_t sioopen;
378 static d_close_t sioclose;
379 static d_write_t siowrite;
380 static d_ioctl_t sioioctl;
382 #define CDEV_MAJOR 48
383 static struct dev_ops sio_ops = {
384 { driver_name, CDEV_MAJOR, D_TTY | D_KQFILTER },
391 .d_kqfilter = ttykqfilter
394 static int comconsole = -1;
395 static speed_t comdefaultrate = TTYDEF_SPEED;
396 static u_int com_events; /* input chars + weighted output completions */
397 static bool_t sio_registered;
398 static int sio_timeout;
399 static int sio_timeouts_until_log;
400 static struct callout sio_timeout_handle;
402 static struct tty *sio_tty[NSIO];
404 static struct tty sio_tty[NSIO];
406 static const int nsio_tty = NSIO;
409 static u_int cd_inbs;
410 static u_int cy_inbs;
411 static u_int cd_outbs;
412 static u_int cy_outbs;
413 static u_int cy_svrr_probes;
414 static u_int cy_timeouts;
417 static int cy_chip_offset[] = {
418 0x0000, 0x0400, 0x0800, 0x0c00, 0x0200, 0x0600, 0x0a00, 0x0e00,
420 static int cy_nr_cd1400s[NCY];
421 static int cy_total_devices;
422 #undef RxFifoThreshold
423 static int volatile RxFifoThreshold = (CD1400_RX_FIFO_SIZE / 2);
427 struct isa_device *dev;
431 iobase = (cy_addr)dev->id_maddr;
433 /* Cyclom-16Y hardware reset (Cyclom-8Ys don't care) */
434 cy_inb(iobase, CY16_RESET, 0); /* XXX? */
435 DELAY(500); /* wait for the board to get its act together */
437 /* this is needed to get the board out of reset */
438 cy_outb(iobase, CY_CLEAR_INTR, 0, 0);
441 return (cy_units(iobase, 0) == 0 ? 0 : -1);
445 cy_units(cy_iobase, cy_align)
450 u_char firmware_version = 0; /* assign to avoid warning */
454 for (cyu = 0; cyu < CY_MAX_CD1400s; ++cyu) {
455 iobase = cy_iobase + (cy_chip_offset[cyu] << cy_align);
457 /* wait for chip to become ready for new command */
458 for (i = 0; i < 10; i++) {
460 if (!cd_inb(iobase, CD1400_CCR, cy_align))
464 /* clear the GFRCR register */
465 cd_outb(iobase, CD1400_GFRCR, cy_align, 0);
467 /* issue a reset command */
468 cd_outb(iobase, CD1400_CCR, cy_align,
469 CD1400_CCR_CMDRESET | CD1400_CCR_FULLRESET);
471 /* wait for the CD1400 to initialize itself */
472 for (i = 0; i < 200; i++) {
475 /* retrieve firmware version */
476 firmware_version = cd_inb(iobase, CD1400_GFRCR,
478 if ((firmware_version & 0xf0) == 0x40)
483 * Anything in the 0x40-0x4F range is fine.
484 * If one CD1400 is bad then we don't support higher
485 * numbered good ones on this board.
487 if ((firmware_version & 0xf0) != 0x40)
495 struct isa_device *isdp;
499 adapter = cyattach_common((cy_addr) isdp->id_maddr, 0);
505 * This kludge is to allow ISA/PCI device specifications in the
506 * kernel config file to be in any order.
508 if (isdp->id_unit != adapter) {
509 printf("cy%d: attached as cy%d\n", isdp->id_unit, adapter);
510 isdp->id_unit = adapter; /* XXX */
512 isdp->id_intr = (inthand2_t *)siointr;
513 /* isdp->id_ri_flags |= RI_FAST; XXX unimplemented - use newbus! */
518 cyattach_common(cy_iobase, cy_align)
524 u_char firmware_version;
530 adapter = cy_total_devices;
531 if ((u_int)adapter >= NCY) {
533 "cy%d: can't attach adapter: insufficient cy devices configured\n",
537 ncyu = cy_units(cy_iobase, cy_align);
540 cy_nr_cd1400s[adapter] = ncyu;
543 unit = adapter * CY_MAX_PORTS;
544 for (cyu = 0; cyu < ncyu; ++cyu) {
547 iobase = (cy_addr) (cy_iobase
548 + (cy_chip_offset[cyu] << cy_align));
549 firmware_version = cd_inb(iobase, CD1400_GFRCR, cy_align);
551 /* Set up a receive timeout period of than 1+ ms. */
552 cd_outb(iobase, CD1400_PPR, cy_align,
553 howmany(CY_CLOCK(firmware_version)
554 / CD1400_PPR_PRESCALER, 1000));
556 for (cdu = 0; cdu < CD1400_NO_OF_CHANNELS; ++cdu, ++unit) {
559 com = kmalloc(sizeof *com, M_DEVBUF, M_WAITOK | M_ZERO);
561 callout_init(&com->dtr_ch);
562 com->gfrcr_image = firmware_version;
563 if (CY_RTS_DTR_SWAPPED(firmware_version)) {
564 com->mcr_dtr = MCR_RTS;
565 com->mcr_rts = MCR_DTR;
566 com->mcr_rts_reg = CD1400_MSVR2;
568 com->mcr_dtr = MCR_DTR;
569 com->mcr_rts = MCR_RTS;
570 com->mcr_rts_reg = CD1400_MSVR1;
572 com->dtr_wait = 3 * hz;
573 com->obufs[0].l_head = com->obuf1;
574 com->obufs[1].l_head = com->obuf2;
576 com->cy_align = cy_align;
577 com->cy_iobase = cy_iobase;
578 com->iobase = iobase;
579 com->car = ~CD1400_CAR_CHAN;
582 * We don't use all the flags from <sys/ttydefaults.h> since they
583 * are only relevant for logins. It's important to have echo off
584 * initially so that the line doesn't start blathering before the
585 * echo flag can be turned off.
587 com->it_in.c_iflag = 0;
588 com->it_in.c_oflag = 0;
589 com->it_in.c_cflag = TTYDEF_CFLAG;
590 com->it_in.c_lflag = 0;
591 if (unit == comconsole) {
592 com->it_in.c_iflag = TTYDEF_IFLAG;
593 com->it_in.c_oflag = TTYDEF_OFLAG;
594 com->it_in.c_cflag = TTYDEF_CFLAG | CLOCAL;
595 com->it_in.c_lflag = TTYDEF_LFLAG;
596 com->lt_out.c_cflag = com->lt_in.c_cflag = CLOCAL;
598 if (siosetwater(com, com->it_in.c_ispeed) != 0) {
600 kfree(com, M_DEVBUF);
604 termioschars(&com->it_in);
605 com->it_in.c_ispeed = com->it_in.c_ospeed = comdefaultrate;
606 com->it_out = com->it_in;
609 com_addr(unit) = com;
612 if (!sio_registered) {
613 callout_init(&sio_timeout_handle);
614 register_swi(SWI_TTY, siopoll, NULL, "cy", NULL);
615 sio_registered = TRUE;
617 minorbase = UNIT_TO_MINOR(unit);
618 dev_ops_add(&sio_ops, UNIT_TO_MINOR(-1), minorbase);
619 make_dev(&sio_ops, minorbase,
620 UID_ROOT, GID_WHEEL, 0600, "ttyc%r%r", adapter,
621 unit % CY_MAX_PORTS);
622 make_dev(&sio_ops, minorbase | CONTROL_INIT_STATE,
623 UID_ROOT, GID_WHEEL, 0600, "ttyic%r%r", adapter,
624 unit % CY_MAX_PORTS);
625 make_dev(&sio_ops, minorbase | CONTROL_LOCK_STATE,
626 UID_ROOT, GID_WHEEL, 0600, "ttylc%r%r", adapter,
627 unit % CY_MAX_PORTS);
628 make_dev(&sio_ops, minorbase | CALLOUT_MASK,
629 UID_UUCP, GID_DIALER, 0660, "cuac%r%r", adapter,
630 unit % CY_MAX_PORTS);
631 make_dev(&sio_ops, minorbase | CALLOUT_MASK | CONTROL_INIT_STATE,
632 UID_UUCP, GID_DIALER, 0660, "cuaic%r%r", adapter,
633 unit % CY_MAX_PORTS);
634 make_dev(&sio_ops, minorbase | CALLOUT_MASK | CONTROL_LOCK_STATE,
635 UID_UUCP, GID_DIALER, 0660, "cualc%r%r", adapter,
636 unit % CY_MAX_PORTS);
638 /* for(cdu...), for(cyu...) terminating blocks */
642 /* ensure an edge for the next interrupt */
643 cy_outb(cy_iobase, CY_CLEAR_INTR, cy_align, 0);
649 sioopen(struct dev_open_args *ap)
651 dev_t dev = ap->a_head.a_dev;
659 unit = MINOR_TO_UNIT(mynor);
660 if ((u_int) unit >= NSIO || (com = com_addr(unit)) == NULL)
662 if (mynor & CONTROL_MASK)
665 tp = com->tp = sio_tty[unit] = ttymalloc(sio_tty[unit]);
667 tp = com->tp = &sio_tty[unit];
672 * We jump to this label after all non-interrupted sleeps to pick
673 * up any changes of the device state.
676 while (com->state & CS_DTR_OFF) {
677 error = tsleep(&com->dtr_wait, PCATCH, "cydtr", 0);
681 if (tp->t_state & TS_ISOPEN) {
683 * The device is open, so everything has been initialized.
686 if (mynor & CALLOUT_MASK) {
687 if (!com->active_out) {
692 if (com->active_out) {
693 if (ap->a_oflags & O_NONBLOCK) {
697 error = tsleep(&com->active_out,
704 if (tp->t_state & TS_XCLUDE &&
705 suser_cred(ap->a_cred, 0)) {
711 * The device isn't open, so there are no conflicts.
712 * Initialize it. Initialization is done twice in many
713 * cases: to preempt sleeping callin opens if we are
714 * callout, and to complete a callin open after DCD rises.
716 tp->t_oproc = comstart;
717 tp->t_stop = comstop;
718 tp->t_param = comparam;
720 tp->t_termios = mynor & CALLOUT_MASK
721 ? com->it_out : com->it_in;
723 /* Encode per-board unit in LIVR for access in intr routines. */
724 cd_setreg(com, CD1400_LIVR,
725 (unit & CD1400_xIVR_CHAN) << CD1400_xIVR_CHAN_SHIFT);
727 (void)commctl(com, TIOCM_DTR | TIOCM_RTS, DMSET);
729 com->poll = com->no_irq;
730 com->poll_output = com->loses_outints;
733 error = comparam(tp, &tp->t_termios);
740 * (Re)enable and flush fifos.
742 * Certain SMC chips cause problems if the fifos
743 * are enabled while input is ready. Turn off the
744 * fifo if necessary to clear the input. We test
745 * the input ready bit after enabling the fifos
746 * since we've already enabled them in comparam()
747 * and to handle races between enabling and fresh
751 outb(iobase + com_fifo,
752 FIFO_RCV_RST | FIFO_XMT_RST
755 if (!(inb(com->line_status_port) & LSR_RXRDY))
757 outb(iobase + com_fifo, 0);
759 (void) inb(com->data_port);
764 (void) inb(com->line_status_port);
765 (void) inb(com->data_port);
766 com->prev_modem_status = com->last_modem_status
767 = inb(com->modem_status_port);
768 outb(iobase + com_ier, IER_ERXRDY | IER_ETXRDY | IER_ERLS
773 * Flush fifos. This requires a full channel reset which
774 * also disables the transmitter and receiver. Recover
777 cd1400_channel_cmd(com,
778 CD1400_CCR_CMDRESET | CD1400_CCR_CHANRESET);
779 cd1400_channel_cmd(com, com->channel_control);
782 com->prev_modem_status = com->last_modem_status
783 = cd_getreg(com, CD1400_MSVR2);
784 cd_setreg(com, CD1400_SRER,
786 = CD1400_SRER_MDMCH | CD1400_SRER_RXDATA);
790 * Handle initial DCD. Callout devices get a fake initial
791 * DCD (trapdoor DCD). If we are callout, then any sleeping
792 * callin opens get woken up and resume sleeping on "cybi"
793 * instead of "cydcd".
796 * XXX `mynor & CALLOUT_MASK' should be
797 * `tp->t_cflag & (SOFT_CARRIER | TRAPDOOR_CARRIER) where
798 * TRAPDOOR_CARRIER is the default initial state for callout
799 * devices and SOFT_CARRIER is like CLOCAL except it hides
802 if (com->prev_modem_status & MSR_DCD || mynor & CALLOUT_MASK)
803 (*linesw[tp->t_line].l_modem)(tp, 1);
806 * Wait for DCD if necessary.
808 if (!(tp->t_state & TS_CARR_ON) && !(mynor & CALLOUT_MASK)
809 && !(tp->t_cflag & CLOCAL) && !(ap->a_oflags & O_NONBLOCK)) {
811 error = tsleep(TSA_CARR_ON(tp), PCATCH, "cydcd", 0);
817 error = (*linesw[tp->t_line].l_open)(dev, tp);
818 disc_optim(tp, &tp->t_termios, com);
819 if (tp->t_state & TS_ISOPEN && mynor & CALLOUT_MASK)
820 com->active_out = TRUE;
824 if (!(tp->t_state & TS_ISOPEN) && com->wopeners == 0)
830 sioclose(struct dev_close_args *ap)
832 dev_t dev = ap->a_head.a_dev;
838 if (mynor & CONTROL_MASK)
840 com = com_addr(MINOR_TO_UNIT(mynor));
843 cd_etc(com, CD1400_ETC_STOPBREAK);
844 (*linesw[tp->t_line].l_close)(tp, ap->a_fflag);
845 disc_optim(tp, &tp->t_termios, com);
846 comstop(tp, FREAD | FWRITE);
851 #ifdef broken /* session holds a ref to the tty; can't deallocate */
853 com->tp = sio_tty[unit] = NULL;
867 iobase = com->iobase;
871 com->poll_output = FALSE;
873 com->do_timestamp = 0;
875 outb(iobase + com_cfcr, com->cfcr_image &= ~CFCR_SBREAK);
880 cd_setreg(com, CD1400_COR2, com->cor[1] &= ~CD1400_COR2_ETC);
882 cd1400_channel_cmd(com, CD1400_CCR_CMDRESET | CD1400_CCR_FTF);
887 outb(iobase + com_ier, 0);
890 cd_setreg(com, CD1400_SRER, com->intr_enable = 0);
894 if ((tp->t_cflag & HUPCL)
896 * XXX we will miss any carrier drop between here and the
897 * next open. Perhaps we should watch DCD even when the
898 * port is closed; it is not sufficient to check it at
899 * the next open because it might go up and down while
900 * we're not watching.
903 && !(com->prev_modem_status & MSR_DCD)
904 && !(com->it_in.c_cflag & CLOCAL))
905 || !(tp->t_state & TS_ISOPEN)) {
906 (void)commctl(com, TIOCM_DTR, DMBIC);
908 /* Disable receiver (leave transmitter enabled). */
909 com->channel_control = CD1400_CCR_CMDCHANCTL
912 cd1400_channel_cmd(com, com->channel_control);
914 if (com->dtr_wait != 0 && !(com->state & CS_DTR_OFF)) {
915 callout_reset(&com->dtr_ch, com->dtr_wait,
917 com->state |= CS_DTR_OFF;
924 * Disable fifos so that they are off after controlled
925 * reboots. Some BIOSes fail to detect 16550s when the
928 outb(iobase + com_fifo, 0);
931 com->active_out = FALSE;
932 wakeup(&com->active_out);
933 wakeup(TSA_CARR_ON(tp)); /* restart any wopeners */
938 siowrite(struct dev_write_args *ap)
940 dev_t dev = ap->a_head.a_dev;
941 struct uio *uio = ap->a_uio;
947 if (mynor & CONTROL_MASK)
950 unit = MINOR_TO_UNIT(mynor);
951 tp = com_addr(unit)->tp;
953 * (XXX) We disallow virtual consoles if the physical console is
954 * a serial port. This is in case there is a display attached that
955 * is not the console. In that situation we don't need/want the X
956 * server taking over the console.
958 if (constty != NULL && unit == comconsole)
961 /* XXX duplicate ttwrite(), but without so much output processing on
962 * CR & LF chars. Hardly worth the effort, given that high-throughput
963 * sessions are raw anyhow.
966 return ((*linesw[tp->t_line].l_write)(tp, uio, ap->a_ioflag));
976 com = (struct com_s *)chan;
977 com->state &= ~CS_DTR_OFF;
978 wakeup(&com->dtr_wait);
993 if (!(tp->t_state & TS_ISOPEN)) {
994 com_events -= (com->iptr - com->ibuf);
995 com->iptr = com->ibuf;
998 if (tp->t_state & TS_CAN_BYPASS_L_RINT) {
1000 * Avoid the grotesquely inefficient lineswitch routine
1001 * (ttyinput) in "raw" mode. It usually takes about 450
1002 * instructions (that's without canonical processing or echo!).
1003 * slinput is reasonably fast (usually 40 instructions plus
1008 incc = com->iptr - buf;
1009 if (tp->t_rawq.c_cc + incc > tp->t_ihiwat
1010 && (com->state & CS_RTS_IFLOW
1011 || tp->t_iflag & IXOFF)
1012 && !(tp->t_state & TS_TBLOCK))
1014 com->delta_error_counts[CE_TTY_BUF_OVERFLOW]
1015 += b_to_q((char *)buf, incc, &tp->t_rawq);
1019 tp->t_rawcc += incc;
1021 if (tp->t_state & TS_TTSTOP
1022 && (tp->t_iflag & IXANY
1023 || tp->t_cc[VSTART] == tp->t_cc[VSTOP])) {
1024 tp->t_state &= ~TS_TTSTOP;
1025 tp->t_lflag &= ~FLUSHO;
1029 } while (buf < com->iptr);
1033 line_status = buf[com->ierroff];
1036 & (LSR_BI | LSR_FE | LSR_OE | LSR_PE)) {
1037 if (line_status & LSR_BI)
1038 recv_data |= TTY_BI;
1039 if (line_status & LSR_FE)
1040 recv_data |= TTY_FE;
1041 if (line_status & LSR_OE)
1042 recv_data |= TTY_OE;
1043 if (line_status & LSR_PE)
1044 recv_data |= TTY_PE;
1046 (*linesw[tp->t_line].l_rint)(recv_data, tp);
1048 } while (buf < com->iptr);
1050 com_events -= (com->iptr - com->ibuf);
1051 com->iptr = com->ibuf;
1054 * There is now room for another low-level buffer full of input,
1055 * so enable RTS if it is now disabled and there is room in the
1056 * high-level buffer.
1058 if ((com->state & CS_RTS_IFLOW) && !(com->mcr_image & com->mcr_rts) &&
1059 !(tp->t_state & TS_TBLOCK))
1061 outb(com->modem_ctl_port, com->mcr_image |= MCR_RTS);
1063 cd_setreg(com, com->mcr_rts_reg,
1064 com->mcr_image |= com->mcr_rts);
1071 int unit = (int)arg;
1079 com_lock(); /* XXX could this be placed down lower in the loop? */
1081 baseu = unit * CY_MAX_PORTS;
1082 cy_align = com_addr(baseu)->cy_align;
1083 cy_iobase = com_addr(baseu)->cy_iobase;
1085 /* check each CD1400 in turn */
1086 for (cyu = 0; cyu < cy_nr_cd1400s[unit]; ++cyu) {
1087 iobase = (cy_addr) (cy_iobase
1088 + (cy_chip_offset[cyu] << cy_align));
1089 /* poll to see if it has any work */
1090 status = cd_inb(iobase, CD1400_SVRR, cy_align);
1096 /* service requests as appropriate, giving priority to RX */
1097 if (status & CD1400_SVRR_RXRDY) {
1109 save_rir = cd_inb(iobase, CD1400_RIR, cy_align);
1111 /* enter rx service */
1112 cd_outb(iobase, CD1400_CAR, cy_align, save_rir);
1113 com_addr(baseu + cyu * CD1400_NO_OF_CHANNELS)->car
1114 = save_rir & CD1400_CAR_CHAN;
1116 serv_type = cd_inb(iobase, CD1400_RIVR, cy_align);
1117 com = com_addr(baseu
1118 + ((serv_type >> CD1400_xIVR_CHAN_SHIFT)
1119 & CD1400_xIVR_CHAN));
1121 /* ack receive service */
1122 serv_type = cy_inb(iobase, CY8_SVCACKR, cy_align);
1124 com = com_addr(baseu +
1125 + ((serv_type >> CD1400_xIVR_CHAN_SHIFT)
1126 & CD1400_xIVR_CHAN));
1129 if (serv_type & CD1400_RIVR_EXCEPTION) {
1130 ++com->recv_exception;
1131 line_status = cd_inb(iobase, CD1400_RDSR, cy_align);
1132 /* break/unnattached error bits or real input? */
1133 recv_data = cd_inb(iobase, CD1400_RDSR, cy_align);
1134 #ifndef SOFT_HOTCHAR
1135 if (line_status & CD1400_RDSR_SPECIAL
1136 && com->hotchar != 0)
1139 #if 1 /* XXX "intelligent" PFO error handling would break O error handling */
1140 if (line_status & (LSR_PE|LSR_FE|LSR_BI)) {
1142 Don't store PE if IGNPAR and BI if IGNBRK,
1143 this hack allows "raw" tty optimization
1144 works even if IGN* is set.
1146 if ( com->tp == NULL
1147 || !(com->tp->t_state & TS_ISOPEN)
1148 || ((line_status & (LSR_PE|LSR_FE))
1149 && (com->tp->t_iflag & IGNPAR))
1150 || ((line_status & LSR_BI)
1151 && (com->tp->t_iflag & IGNBRK)))
1153 if ( (line_status & (LSR_PE|LSR_FE))
1154 && (com->tp->t_state & TS_CAN_BYPASS_L_RINT)
1155 && ((line_status & LSR_FE)
1156 || ((line_status & LSR_PE)
1157 && (com->tp->t_iflag & INPCK))))
1163 if (com->hotchar != 0 && recv_data == com->hotchar)
1167 if (ioptr >= com->ibufend)
1168 CE_RECORD(com, CE_INTERRUPT_BUF_OVERFLOW);
1170 if (com->do_timestamp)
1171 microtime(&com->timestamp);
1173 ioptr[0] = recv_data;
1174 ioptr[com->ierroff] = line_status;
1175 com->iptr = ++ioptr;
1176 if (ioptr == com->ihighwater
1177 && com->state & CS_RTS_IFLOW)
1179 outb(com->modem_ctl_port,
1180 com->mcr_image &= ~MCR_RTS);
1182 cd_outb(iobase, com->mcr_rts_reg,
1187 if (line_status & LSR_OE)
1188 CE_RECORD(com, CE_OVERRUN);
1194 count = cd_inb(iobase, CD1400_RDCR, cy_align);
1197 com->bytes_in += count;
1199 ifree = com->ibufend - ioptr;
1200 if (count > ifree) {
1202 com_events += ifree;
1204 if (com->do_timestamp)
1205 microtime(&com->timestamp);
1207 recv_data = cd_inb(iobase,
1211 if (com->hotchar != 0
1216 ioptr[0] = recv_data;
1217 ioptr[com->ierroff] = 0;
1219 } while (--ifree != 0);
1221 com->delta_error_counts
1222 [CE_INTERRUPT_BUF_OVERFLOW] += count;
1224 recv_data = cd_inb(iobase, CD1400_RDSR,
1227 if (com->hotchar != 0
1228 && recv_data == com->hotchar)
1231 } while (--count != 0);
1233 if (com->do_timestamp)
1234 microtime(&com->timestamp);
1235 if (ioptr <= com->ihighwater
1236 && ioptr + count > com->ihighwater
1237 && com->state & CS_RTS_IFLOW)
1239 outb(com->modem_ctl_port,
1240 com->mcr_image &= ~MCR_RTS);
1242 cd_outb(iobase, com->mcr_rts_reg,
1247 com_events += count;
1249 recv_data = cd_inb(iobase, CD1400_RDSR,
1252 if (com->hotchar != 0
1253 && recv_data == com->hotchar)
1256 ioptr[0] = recv_data;
1257 ioptr[com->ierroff] = 0;
1259 } while (--count != 0);
1265 /* terminate service context */
1267 cd_outb(iobase, CD1400_RIR, cy_align,
1269 & ~(CD1400_RIR_RDIREQ | CD1400_RIR_RBUSY));
1271 cd_outb(iobase, CD1400_EOSRR, cy_align, 0);
1274 if (status & CD1400_SVRR_MDMCH) {
1276 u_char modem_status;
1284 save_mir = cd_inb(iobase, CD1400_MIR, cy_align);
1286 /* enter modem service */
1287 cd_outb(iobase, CD1400_CAR, cy_align, save_mir);
1288 com_addr(baseu + cyu * CD1400_NO_OF_CHANNELS)->car
1289 = save_mir & CD1400_CAR_CHAN;
1291 com = com_addr(baseu + cyu * CD1400_NO_OF_CHANNELS
1292 + (save_mir & CD1400_MIR_CHAN));
1294 /* ack modem service */
1295 vector = cy_inb(iobase, CY8_SVCACKM, cy_align);
1297 com = com_addr(baseu
1298 + ((vector >> CD1400_xIVR_CHAN_SHIFT)
1299 & CD1400_xIVR_CHAN));
1302 modem_status = cd_inb(iobase, CD1400_MSVR2, cy_align);
1303 if (modem_status != com->last_modem_status) {
1304 if (com->do_dcd_timestamp
1305 && !(com->last_modem_status & MSR_DCD)
1306 && modem_status & MSR_DCD)
1307 microtime(&com->dcd_timestamp);
1310 * Schedule high level to handle DCD changes. Note
1311 * that we don't use the delta bits anywhere. Some
1312 * UARTs mess them up, and it's easy to remember the
1313 * previous bits and calculate the delta.
1315 com->last_modem_status = modem_status;
1316 if (!(com->state & CS_CHECKMSR)) {
1317 com_events += LOTS_OF_EVENTS;
1318 com->state |= CS_CHECKMSR;
1322 #ifdef SOFT_CTS_OFLOW
1323 /* handle CTS change immediately for crisp flow ctl */
1324 if (com->state & CS_CTS_OFLOW) {
1325 if (modem_status & MSR_CTS) {
1326 com->state |= CS_ODEVREADY;
1327 if (com->state >= (CS_BUSY | CS_TTGO
1329 && !(com->intr_enable
1330 & CD1400_SRER_TXRDY))
1331 cd_outb(iobase, CD1400_SRER,
1335 & ~CD1400_SRER_TXMPTY
1336 | CD1400_SRER_TXRDY);
1338 com->state &= ~CS_ODEVREADY;
1339 if (com->intr_enable
1340 & CD1400_SRER_TXRDY)
1341 cd_outb(iobase, CD1400_SRER,
1345 & ~CD1400_SRER_TXRDY
1346 | CD1400_SRER_TXMPTY);
1352 /* terminate service context */
1354 cd_outb(iobase, CD1400_MIR, cy_align,
1356 & ~(CD1400_MIR_RDIREQ | CD1400_MIR_RBUSY));
1358 cd_outb(iobase, CD1400_EOSRR, cy_align, 0);
1361 if (status & CD1400_SVRR_TXRDY) {
1370 save_tir = cd_inb(iobase, CD1400_TIR, cy_align);
1372 /* enter tx service */
1373 cd_outb(iobase, CD1400_CAR, cy_align, save_tir);
1374 com_addr(baseu + cyu * CD1400_NO_OF_CHANNELS)->car
1375 = save_tir & CD1400_CAR_CHAN;
1377 com = com_addr(baseu
1378 + cyu * CD1400_NO_OF_CHANNELS
1379 + (save_tir & CD1400_TIR_CHAN));
1381 /* ack transmit service */
1382 vector = cy_inb(iobase, CY8_SVCACKT, cy_align);
1384 com = com_addr(baseu
1385 + ((vector >> CD1400_xIVR_CHAN_SHIFT)
1386 & CD1400_xIVR_CHAN));
1389 if (com->etc != ETC_NONE) {
1390 if (com->intr_enable & CD1400_SRER_TXRDY) {
1392 * Here due to sloppy SRER_TXRDY
1393 * enabling. Ignore. Come back when
1396 cd_outb(iobase, CD1400_SRER, cy_align,
1399 & ~CD1400_SRER_TXRDY)
1400 | CD1400_SRER_TXMPTY);
1401 goto terminate_tx_service;
1404 case CD1400_ETC_SENDBREAK:
1405 case CD1400_ETC_STOPBREAK:
1407 * Start the command. Come back on
1408 * next tx empty interrupt, hopefully
1409 * after command has been executed.
1411 cd_outb(iobase, CD1400_COR2, cy_align,
1412 com->cor[1] |= CD1400_COR2_ETC);
1413 cd_outb(iobase, CD1400_TDR, cy_align,
1415 cd_outb(iobase, CD1400_TDR, cy_align,
1417 if (com->etc == CD1400_ETC_SENDBREAK)
1418 com->etc = ETC_BREAK_STARTING;
1420 com->etc = ETC_BREAK_ENDING;
1421 goto terminate_tx_service;
1422 case ETC_BREAK_STARTING:
1424 * BREAK is now on. Continue with
1425 * SRER_TXMPTY processing, hopefully
1428 com->etc = ETC_BREAK_STARTED;
1430 case ETC_BREAK_STARTED:
1432 * Came back due to sloppy SRER_TXMPTY
1433 * enabling. Hope again.
1436 case ETC_BREAK_ENDING:
1438 * BREAK is now off. Continue with
1439 * SRER_TXMPTY processing and don't
1440 * come back. The SWI handler will
1441 * restart tx interrupts if necessary.
1443 cd_outb(iobase, CD1400_COR2, cy_align,
1445 &= ~CD1400_COR2_ETC);
1446 com->etc = ETC_BREAK_ENDED;
1447 if (!(com->state & CS_ODONE)) {
1448 com_events += LOTS_OF_EVENTS;
1449 com->state |= CS_ODONE;
1453 case ETC_BREAK_ENDED:
1455 * Shouldn't get here. Hope again.
1460 if (com->intr_enable & CD1400_SRER_TXMPTY) {
1461 if (!(com->extra_state & CSE_ODONE)) {
1462 com_events += LOTS_OF_EVENTS;
1463 com->extra_state |= CSE_ODONE;
1466 cd_outb(iobase, CD1400_SRER, cy_align,
1468 &= ~CD1400_SRER_TXMPTY);
1469 goto terminate_tx_service;
1471 if (com->state >= (CS_BUSY | CS_TTGO | CS_ODEVREADY)) {
1475 ioptr = com->obufq.l_head;
1476 ocount = com->obufq.l_tail - ioptr;
1477 if (ocount > CD1400_TX_FIFO_SIZE)
1478 ocount = CD1400_TX_FIFO_SIZE;
1479 com->bytes_out += ocount;
1481 cd_outb(iobase, CD1400_TDR, cy_align,
1483 while (--ocount != 0);
1484 com->obufq.l_head = ioptr;
1485 if (ioptr >= com->obufq.l_tail) {
1488 qp = com->obufq.l_next;
1489 qp->l_queued = FALSE;
1492 com->obufq.l_head = qp->l_head;
1493 com->obufq.l_tail = qp->l_tail;
1494 com->obufq.l_next = qp;
1496 /* output just completed */
1497 com->state &= ~CS_BUSY;
1500 * The setting of CSE_ODONE may be
1501 * stale here. We currently only
1502 * use it when CS_BUSY is set, and
1503 * fixing it when we clear CS_BUSY
1506 if (com->extra_state & CSE_ODONE) {
1507 com_events -= LOTS_OF_EVENTS;
1508 com->extra_state &= ~CSE_ODONE;
1511 cd_outb(iobase, CD1400_SRER, cy_align,
1514 & ~CD1400_SRER_TXRDY)
1515 | CD1400_SRER_TXMPTY);
1517 if (!(com->state & CS_ODONE)) {
1518 com_events += LOTS_OF_EVENTS;
1519 com->state |= CS_ODONE;
1521 /* handle at high level ASAP */
1527 /* terminate service context */
1528 terminate_tx_service:
1530 cd_outb(iobase, CD1400_TIR, cy_align,
1532 & ~(CD1400_TIR_RDIREQ | CD1400_TIR_RBUSY));
1534 cd_outb(iobase, CD1400_EOSRR, cy_align, 0);
1539 /* ensure an edge for the next interrupt */
1540 cy_outb(cy_iobase, CY_CLEAR_INTR, cy_align, 0);
1556 sioioctl(struct dev_ioctl_args *ap)
1558 dev_t dev = ap->a_head.a_dev;
1559 caddr_t data = ap->a_data;
1560 u_long cmd = ap->a_cmd;
1565 #if defined(COMPAT_43) || defined(COMPAT_SUNOS)
1567 struct termios term;
1571 com = com_addr(MINOR_TO_UNIT(mynor));
1572 if (mynor & CONTROL_MASK) {
1575 switch (mynor & CONTROL_MASK) {
1576 case CONTROL_INIT_STATE:
1577 ct = mynor & CALLOUT_MASK ? &com->it_out : &com->it_in;
1579 case CONTROL_LOCK_STATE:
1580 ct = mynor & CALLOUT_MASK ? &com->lt_out : &com->lt_in;
1583 return (ENODEV); /* /dev/nodev */
1587 error = suser_cred(ap->a_cred, 0);
1590 *ct = *(struct termios *)data;
1593 *(struct termios *)data = *ct;
1596 *(int *)data = TTYDISC;
1599 bzero(data, sizeof(struct winsize));
1606 #if defined(COMPAT_43) || defined(COMPAT_SUNOS)
1607 term = tp->t_termios;
1609 error = ttsetcompat(tp, &cmd, data, &term);
1613 data = (caddr_t)&term;
1615 if (cmd == TIOCSETA || cmd == TIOCSETAW || cmd == TIOCSETAF) {
1617 struct termios *dt = (struct termios *)data;
1618 struct termios *lt = mynor & CALLOUT_MASK
1619 ? &com->lt_out : &com->lt_in;
1621 dt->c_iflag = (tp->t_iflag & lt->c_iflag)
1622 | (dt->c_iflag & ~lt->c_iflag);
1623 dt->c_oflag = (tp->t_oflag & lt->c_oflag)
1624 | (dt->c_oflag & ~lt->c_oflag);
1625 dt->c_cflag = (tp->t_cflag & lt->c_cflag)
1626 | (dt->c_cflag & ~lt->c_cflag);
1627 dt->c_lflag = (tp->t_lflag & lt->c_lflag)
1628 | (dt->c_lflag & ~lt->c_lflag);
1629 for (cc = 0; cc < NCCS; ++cc)
1630 if (lt->c_cc[cc] != 0)
1631 dt->c_cc[cc] = tp->t_cc[cc];
1632 if (lt->c_ispeed != 0)
1633 dt->c_ispeed = tp->t_ispeed;
1634 if (lt->c_ospeed != 0)
1635 dt->c_ospeed = tp->t_ospeed;
1637 error = (*linesw[tp->t_line].l_ioctl)(tp, cmd, data,
1638 ap->a_fflag, ap->a_cred);
1639 if (error != ENOIOCTL)
1642 error = ttioctl(tp, cmd, data, ap->a_fflag);
1643 disc_optim(tp, &tp->t_termios, com);
1644 if (error != ENOIOCTL) {
1651 outb(iobase + com_cfcr, com->cfcr_image |= CFCR_SBREAK);
1653 cd_etc(com, CD1400_ETC_SENDBREAK);
1658 outb(iobase + com_cfcr, com->cfcr_image &= ~CFCR_SBREAK);
1660 cd_etc(com, CD1400_ETC_STOPBREAK);
1664 (void)commctl(com, TIOCM_DTR, DMBIS);
1667 (void)commctl(com, TIOCM_DTR, DMBIC);
1670 * XXX should disallow changing MCR_RTS if CS_RTS_IFLOW is set. The
1671 * changes get undone on the next call to comparam().
1674 (void)commctl(com, *(int *)data, DMSET);
1677 (void)commctl(com, *(int *)data, DMBIS);
1680 (void)commctl(com, *(int *)data, DMBIC);
1683 *(int *)data = commctl(com, 0, DMGET);
1686 /* must be root since the wait applies to following logins */
1687 error = suser_cred(ap->a_cred, 0);
1692 com->dtr_wait = *(int *)data * hz / 100;
1695 *(int *)data = com->dtr_wait * 100 / hz;
1698 com->do_timestamp = TRUE;
1699 *(struct timeval *)data = com->timestamp;
1701 case TIOCDCDTIMESTAMP:
1702 com->do_dcd_timestamp = TRUE;
1703 *(struct timeval *)data = com->dcd_timestamp;
1714 siopoll(void *data, void *frame)
1721 if (com_events == 0)
1724 for (unit = 0; unit < NSIO; ++unit) {
1729 com = com_addr(unit);
1735 * XXX forget any events related to closed devices
1736 * (actually never opened devices) so that we don't
1740 incc = com->iptr - com->ibuf;
1741 com->iptr = com->ibuf;
1742 if (com->state & CS_CHECKMSR) {
1743 incc += LOTS_OF_EVENTS;
1744 com->state &= ~CS_CHECKMSR;
1750 "sio%d: %d events for device with no tp\n",
1754 if (com->iptr != com->ibuf) {
1759 if (com->state & CS_CHECKMSR) {
1760 u_char delta_modem_status;
1763 delta_modem_status = com->last_modem_status
1764 ^ com->prev_modem_status;
1765 com->prev_modem_status = com->last_modem_status;
1766 com_events -= LOTS_OF_EVENTS;
1767 com->state &= ~CS_CHECKMSR;
1769 if (delta_modem_status & MSR_DCD)
1770 (*linesw[tp->t_line].l_modem)
1771 (tp, com->prev_modem_status & MSR_DCD);
1773 if (com->extra_state & CSE_ODONE) {
1775 com_events -= LOTS_OF_EVENTS;
1776 com->extra_state &= ~CSE_ODONE;
1778 if (!(com->state & CS_BUSY)) {
1779 tp->t_state &= ~TS_BUSY;
1782 if (com->etc != ETC_NONE) {
1783 if (com->etc == ETC_BREAK_ENDED)
1784 com->etc = ETC_NONE;
1788 if (com->state & CS_ODONE) {
1790 com_events -= LOTS_OF_EVENTS;
1791 com->state &= ~CS_ODONE;
1793 (*linesw[tp->t_line].l_start)(tp);
1795 if (com_events == 0)
1798 if (com_events >= LOTS_OF_EVENTS)
1821 /* do historical conversions */
1822 if (t->c_ispeed == 0)
1823 t->c_ispeed = t->c_ospeed;
1825 unit = DEV_TO_UNIT(tp->t_dev);
1826 com = com_addr(unit);
1828 /* check requested parameters */
1829 cy_clock = CY_CLOCK(com->gfrcr_image);
1830 idivisor = comspeed(t->c_ispeed, cy_clock, &iprescaler);
1833 odivisor = comspeed(t->c_ospeed, cy_clock, &oprescaler);
1837 /* parameters are OK, convert them to the com struct and the device */
1840 (void)commctl(com, TIOCM_DTR, DMBIC); /* hang up line */
1842 (void)commctl(com, TIOCM_DTR, DMBIS);
1845 * This returns with interrupts disabled so that we can complete
1846 * the speed change atomically.
1848 (void) siosetwater(com, t->c_ispeed);
1850 /* XXX we don't actually change the speed atomically. */
1853 if (idivisor != 0) {
1854 cd_setreg(com, CD1400_RBPR, idivisor);
1855 cd_setreg(com, CD1400_RCOR, iprescaler);
1857 if (odivisor != 0) {
1858 cd_setreg(com, CD1400_TBPR, odivisor);
1859 cd_setreg(com, CD1400_TCOR, oprescaler);
1865 * transmitter enable (always set)
1868 opt = CD1400_CCR_CMDCHANCTL | CD1400_CCR_XMTEN
1869 | (cflag & CREAD ? CD1400_CCR_RCVEN : CD1400_CCR_RCVDIS);
1870 if (opt != com->channel_control) {
1871 com->channel_control = opt;
1872 cd1400_channel_cmd(com, opt);
1876 /* set special chars */
1877 /* XXX if one is _POSIX_VDISABLE, can't use some others */
1878 if (t->c_cc[VSTOP] != _POSIX_VDISABLE)
1879 cd_setreg(com, CD1400_SCHR1, t->c_cc[VSTOP]);
1880 if (t->c_cc[VSTART] != _POSIX_VDISABLE)
1881 cd_setreg(com, CD1400_SCHR2, t->c_cc[VSTART]);
1882 if (t->c_cc[VINTR] != _POSIX_VDISABLE)
1883 cd_setreg(com, CD1400_SCHR3, t->c_cc[VINTR]);
1884 if (t->c_cc[VSUSP] != _POSIX_VDISABLE)
1885 cd_setreg(com, CD1400_SCHR4, t->c_cc[VSUSP]);
1889 * set channel option register 1 -
1896 if (cflag & PARENB) {
1898 opt |= CD1400_COR1_PARODD;
1899 opt |= CD1400_COR1_PARNORMAL;
1902 if (!(iflag & INPCK))
1903 opt |= CD1400_COR1_NOINPCK;
1906 if (cflag & CSTOPB) {
1908 opt |= CD1400_COR1_STOP2;
1911 switch (cflag & CSIZE) {
1914 opt |= CD1400_COR1_CS5;
1918 opt |= CD1400_COR1_CS6;
1922 opt |= CD1400_COR1_CS7;
1926 opt |= CD1400_COR1_CS8;
1930 if (opt != com->cor[0]) {
1931 cor_change |= CD1400_CCR_COR1;
1932 cd_setreg(com, CD1400_COR1, com->cor[0] = opt);
1936 * Set receive time-out period, normally to max(one char time, 5 ms).
1938 if (t->c_ispeed == 0)
1939 itimeout = cd_getreg(com, CD1400_RTPR);
1941 itimeout = (1000 * bits + t->c_ispeed - 1) / t->c_ispeed;
1947 if (itimeout < MIN_RTP)
1950 if (!(t->c_lflag & ICANON) && t->c_cc[VMIN] != 0 && t->c_cc[VTIME] != 0
1951 && t->c_cc[VTIME] * 10 > itimeout)
1952 itimeout = t->c_cc[VTIME] * 10;
1955 cd_setreg(com, CD1400_RTPR, itimeout);
1958 * set channel option register 2 -
1964 opt |= CD1400_COR2_IXANY;
1966 opt |= CD1400_COR2_IXOFF;
1968 #ifndef SOFT_CTS_OFLOW
1969 if (cflag & CCTS_OFLOW)
1970 opt |= CD1400_COR2_CCTS_OFLOW;
1973 if (opt != com->cor[1]) {
1974 cor_change |= CD1400_CCR_COR2;
1975 cd_setreg(com, CD1400_COR2, com->cor[1] = opt);
1980 * set channel option register 3 -
1981 * receiver FIFO interrupt threshold
1984 opt = RxFifoThreshold;
1986 if (t->c_lflag & ICANON)
1987 opt |= CD1400_COR3_SCD34; /* detect INTR & SUSP chars */
1989 /* detect and transparently handle START and STOP chars */
1990 opt |= CD1400_COR3_FCT | CD1400_COR3_SCD12;
1992 if (opt != com->cor[2]) {
1993 cor_change |= CD1400_CCR_COR3;
1994 cd_setreg(com, CD1400_COR3, com->cor[2] = opt);
1997 /* notify the CD1400 if COR1-3 have changed */
1999 cd1400_channel_cmd(com, CD1400_CCR_CMDCORCHG | cor_change);
2002 * set channel option register 4 -
2005 * received exception processing
2009 opt |= CD1400_COR4_IGNCR;
2012 * we need a new ttyinput() for this, as we don't want to
2013 * have ICRNL && INLCR being done in both layers, or to have
2014 * synchronisation problems
2017 opt |= CD1400_COR4_ICRNL;
2019 opt |= CD1400_COR4_INLCR;
2022 opt |= CD1400_COR4_IGNBRK | CD1400_COR4_NOBRKINT;
2024 * The `-ignbrk -brkint parmrk' case is not handled by the hardware,
2025 * so only tell the hardware about -brkint if -parmrk.
2027 if (!(iflag & (BRKINT | PARMRK)))
2028 opt |= CD1400_COR4_NOBRKINT;
2030 /* XXX using this "intelligence" breaks reporting of overruns. */
2032 opt |= CD1400_COR4_PFO_DISCARD;
2035 opt |= CD1400_COR4_PFO_ESC;
2037 opt |= CD1400_COR4_PFO_NUL;
2040 opt |= CD1400_COR4_PFO_EXCEPTION;
2042 cd_setreg(com, CD1400_COR4, opt);
2045 * set channel option register 5 -
2049 opt |= CD1400_COR5_ISTRIP;
2050 if (t->c_iflag & IEXTEN)
2051 /* enable LNEXT (e.g. ctrl-v quoting) handling */
2052 opt |= CD1400_COR5_LNEXT;
2054 if (t->c_oflag & ONLCR)
2055 opt |= CD1400_COR5_ONLCR;
2056 if (t->c_oflag & OCRNL)
2057 opt |= CD1400_COR5_OCRNL;
2059 cd_setreg(com, CD1400_COR5, opt);
2062 * We always generate modem status change interrupts for CD changes.
2063 * Among other things, this is necessary to track TS_CARR_ON for
2064 * pstat to print even when the driver doesn't care. CD changes
2065 * should be rare so interrupts for them are not worth extra code to
2066 * avoid. We avoid interrupts for other modem status changes (except
2067 * for CTS changes when SOFT_CTS_OFLOW is configured) since this is
2068 * simplest and best.
2072 * set modem change option register 1
2073 * generate modem interrupts on which 1 -> 0 input transitions
2074 * also controls auto-DTR output flow-control, which we don't use
2076 opt = CD1400_MCOR1_CDzd;
2077 #ifdef SOFT_CTS_OFLOW
2078 if (cflag & CCTS_OFLOW)
2079 opt |= CD1400_MCOR1_CTSzd;
2081 cd_setreg(com, CD1400_MCOR1, opt);
2084 * set modem change option register 2
2085 * generate modem interrupts on specific 0 -> 1 input transitions
2087 opt = CD1400_MCOR2_CDod;
2088 #ifdef SOFT_CTS_OFLOW
2089 if (cflag & CCTS_OFLOW)
2090 opt |= CD1400_MCOR2_CTSod;
2092 cd_setreg(com, CD1400_MCOR2, opt);
2095 * XXX should have done this long ago, but there is too much state
2096 * to change all atomically.
2100 com->state &= ~CS_TTGO;
2101 if (!(tp->t_state & TS_TTSTOP))
2102 com->state |= CS_TTGO;
2103 if (cflag & CRTS_IFLOW) {
2104 com->state |= CS_RTS_IFLOW;
2106 * If CS_RTS_IFLOW just changed from off to on, the change
2107 * needs to be propagated to MCR_RTS. This isn't urgent,
2108 * so do it later by calling comstart() instead of repeating
2109 * a lot of code from comstart() here.
2111 } else if (com->state & CS_RTS_IFLOW) {
2112 com->state &= ~CS_RTS_IFLOW;
2114 * CS_RTS_IFLOW just changed from on to off. Force MCR_RTS
2115 * on here, since comstart() won't do it later.
2118 outb(com->modem_ctl_port, com->mcr_image |= MCR_RTS);
2120 cd_setreg(com, com->mcr_rts_reg,
2121 com->mcr_image |= com->mcr_rts);
2126 * Set up state to handle output flow control.
2127 * XXX - worth handling MDMBUF (DCD) flow control at the lowest level?
2128 * Now has 10+ msec latency, while CTS flow has 50- usec latency.
2130 com->state |= CS_ODEVREADY;
2131 #ifdef SOFT_CTS_OFLOW
2132 com->state &= ~CS_CTS_OFLOW;
2133 if (cflag & CCTS_OFLOW) {
2134 com->state |= CS_CTS_OFLOW;
2135 if (!(com->last_modem_status & MSR_CTS))
2136 com->state &= ~CS_ODEVREADY;
2139 /* XXX shouldn't call functions while intrs are disabled. */
2140 disc_optim(tp, t, com);
2143 * Recover from fiddling with CS_TTGO. We used to call siointr1()
2144 * unconditionally, but that defeated the careful discarding of
2145 * stale input in sioopen().
2147 if (com->state >= (CS_BUSY | CS_TTGO))
2150 if (com->state >= (CS_BUSY | CS_TTGO | CS_ODEVREADY)) {
2151 if (!(com->intr_enable & CD1400_SRER_TXRDY))
2152 cd_setreg(com, CD1400_SRER,
2154 = (com->intr_enable & ~CD1400_SRER_TXMPTY)
2155 | CD1400_SRER_TXRDY);
2157 if (com->intr_enable & CD1400_SRER_TXRDY)
2158 cd_setreg(com, CD1400_SRER,
2160 = (com->intr_enable & ~CD1400_SRER_TXRDY)
2161 | CD1400_SRER_TXMPTY);
2167 if (com->ibufold != NULL) {
2168 kfree(com->ibufold, M_DEVBUF);
2169 com->ibufold = NULL;
2175 siosetwater(com, speed)
2185 * Make the buffer size large enough to handle a softtty interrupt
2186 * latency of about 2 ticks without loss of throughput or data
2187 * (about 3 ticks if input flow control is not used or not honoured,
2188 * but a bit less for CS5-CS7 modes).
2190 cp4ticks = speed / 10 / hz * 4;
2191 for (ibufsize = 128; ibufsize < cp4ticks;)
2193 if (ibufsize == com->ibufsize) {
2199 * Allocate input buffer. The extra factor of 2 in the size is
2200 * to allow for an error byte for each input byte.
2202 ibuf = kmalloc(2 * ibufsize, M_DEVBUF, M_WAITOK);
2204 /* Initialize non-critical variables. */
2205 com->ibufold = com->ibuf;
2206 com->ibufsize = ibufsize;
2209 tp->t_ififosize = 2 * ibufsize;
2210 tp->t_ispeedwat = (speed_t)-1;
2211 tp->t_ospeedwat = (speed_t)-1;
2215 * Read current input buffer, if any. Continue with interrupts
2219 if (com->iptr != com->ibuf)
2223 * Initialize critical variables, including input buffer watermarks.
2224 * The external device is asked to stop sending when the buffer
2225 * exactly reaches high water, or when the high level requests it.
2226 * The high level is notified immediately (rather than at a later
2227 * clock tick) when this watermark is reached.
2228 * The buffer size is chosen so the watermark should almost never
2230 * The low watermark is invisibly 0 since the buffer is always
2231 * emptied all at once.
2233 com->iptr = com->ibuf = ibuf;
2234 com->ibufend = ibuf + ibufsize;
2235 com->ierroff = ibufsize;
2236 com->ihighwater = ibuf + 3 * ibufsize / 4;
2250 unit = DEV_TO_UNIT(tp->t_dev);
2251 com = com_addr(unit);
2260 if (tp->t_state & TS_TTSTOP) {
2261 com->state &= ~CS_TTGO;
2262 if (com->intr_enable & CD1400_SRER_TXRDY)
2263 cd_setreg(com, CD1400_SRER,
2265 = (com->intr_enable & ~CD1400_SRER_TXRDY)
2266 | CD1400_SRER_TXMPTY);
2268 com->state |= CS_TTGO;
2269 if (com->state >= (CS_BUSY | CS_TTGO | CS_ODEVREADY)
2270 && !(com->intr_enable & CD1400_SRER_TXRDY))
2271 cd_setreg(com, CD1400_SRER,
2273 = (com->intr_enable & ~CD1400_SRER_TXMPTY)
2274 | CD1400_SRER_TXRDY);
2276 if (tp->t_state & TS_TBLOCK) {
2277 if (com->mcr_image & com->mcr_rts && com->state & CS_RTS_IFLOW)
2279 outb(com->modem_ctl_port, com->mcr_image &= ~MCR_RTS);
2281 cd_setreg(com, com->mcr_rts_reg,
2282 com->mcr_image &= ~com->mcr_rts);
2285 if (!(com->mcr_image & com->mcr_rts)
2286 && com->iptr < com->ihighwater
2287 && com->state & CS_RTS_IFLOW)
2289 outb(com->modem_ctl_port, com->mcr_image |= MCR_RTS);
2291 cd_setreg(com, com->mcr_rts_reg,
2292 com->mcr_image |= com->mcr_rts);
2296 if (tp->t_state & (TS_TIMEOUT | TS_TTSTOP)) {
2301 if (tp->t_outq.c_cc != 0) {
2305 if (!com->obufs[0].l_queued) {
2309 com->obufs[0].l_tail
2310 = com->obuf1 + q_to_b(&tp->t_outq, com->obuf1,
2312 com->obufs[0].l_next = NULL;
2313 com->obufs[0].l_queued = TRUE;
2315 if (com->state & CS_BUSY) {
2316 qp = com->obufq.l_next;
2317 while ((next = qp->l_next) != NULL)
2319 qp->l_next = &com->obufs[0];
2321 com->obufq.l_head = com->obufs[0].l_head;
2322 com->obufq.l_tail = com->obufs[0].l_tail;
2323 com->obufq.l_next = &com->obufs[0];
2324 com->state |= CS_BUSY;
2325 if (com->state >= (CS_BUSY | CS_TTGO
2327 cd_setreg(com, CD1400_SRER,
2330 & ~CD1400_SRER_TXMPTY)
2331 | CD1400_SRER_TXRDY);
2335 if (tp->t_outq.c_cc != 0 && !com->obufs[1].l_queued) {
2339 com->obufs[1].l_tail
2340 = com->obuf2 + q_to_b(&tp->t_outq, com->obuf2,
2342 com->obufs[1].l_next = NULL;
2343 com->obufs[1].l_queued = TRUE;
2345 if (com->state & CS_BUSY) {
2346 qp = com->obufq.l_next;
2347 while ((next = qp->l_next) != NULL)
2349 qp->l_next = &com->obufs[1];
2351 com->obufq.l_head = com->obufs[1].l_head;
2352 com->obufq.l_tail = com->obufs[1].l_tail;
2353 com->obufq.l_next = &com->obufs[1];
2354 com->state |= CS_BUSY;
2355 if (com->state >= (CS_BUSY | CS_TTGO
2357 cd_setreg(com, CD1400_SRER,
2360 & ~CD1400_SRER_TXMPTY)
2361 | CD1400_SRER_TXRDY);
2365 tp->t_state |= TS_BUSY;
2373 if (com->state >= (CS_BUSY | CS_TTGO))
2374 siointr1(com); /* fake interrupt to start output */
2389 com = com_addr(DEV_TO_UNIT(tp->t_dev));
2393 com->obufs[0].l_queued = FALSE;
2394 com->obufs[1].l_queued = FALSE;
2395 if (com->extra_state & CSE_ODONE) {
2396 com_events -= LOTS_OF_EVENTS;
2397 com->extra_state &= ~CSE_ODONE;
2398 if (com->etc != ETC_NONE) {
2399 if (com->etc == ETC_BREAK_ENDED)
2400 com->etc = ETC_NONE;
2404 com->tp->t_state &= ~TS_BUSY;
2405 if (com->state & CS_ODONE)
2406 com_events -= LOTS_OF_EVENTS;
2407 com->state &= ~(CS_ODONE | CS_BUSY);
2410 /* XXX no way to reset only input fifo. */
2411 com_events -= (com->iptr - com->ibuf);
2412 com->iptr = com->ibuf;
2417 if (rw & FWRITE && com->etc == ETC_NONE)
2418 cd1400_channel_cmd(com, CD1400_CCR_CMDRESET | CD1400_CCR_FTF);
2423 commctl(com, bits, how)
2432 if (com->channel_control & CD1400_CCR_RCVEN)
2434 mcr = com->mcr_image;
2435 if (mcr & com->mcr_dtr)
2437 if (mcr & com->mcr_rts)
2438 /* XXX wired on for Cyclom-8Ys */
2442 * We must read the modem status from the hardware because
2443 * we don't generate modem status change interrupts for all
2444 * changes, so com->prev_modem_status is not guaranteed to
2445 * be up to date. This is safe, unlike for sio, because
2446 * reading the status register doesn't clear pending modem
2447 * status change interrupts.
2449 msr = cd_getreg(com, CD1400_MSVR2);
2458 /* XXX not connected except for Cyclom-16Y? */
2463 if (bits & TIOCM_DTR)
2464 mcr |= com->mcr_dtr;
2465 if (bits & TIOCM_RTS)
2466 mcr |= com->mcr_rts;
2470 com->mcr_image = mcr;
2471 cd_setreg(com, CD1400_MSVR1, mcr);
2472 cd_setreg(com, CD1400_MSVR2, mcr);
2475 com->mcr_image = mcr = com->mcr_image | mcr;
2476 cd_setreg(com, CD1400_MSVR1, mcr);
2477 cd_setreg(com, CD1400_MSVR2, mcr);
2480 com->mcr_image = mcr = com->mcr_image & ~mcr;
2481 cd_setreg(com, CD1400_MSVR1, mcr);
2482 cd_setreg(com, CD1400_MSVR2, mcr);
2497 * Set our timeout period to 1 second if no polled devices are open.
2498 * Otherwise set it to max(1/200, 1/hz).
2499 * Enable timeouts iff some device is open.
2501 callout_stop(&sio_timeout_handle);
2504 for (unit = 0; unit < NSIO; ++unit) {
2505 com = com_addr(unit);
2506 if (com != NULL && com->tp != NULL
2507 && com->tp->t_state & TS_ISOPEN) {
2510 if (com->poll || com->poll_output) {
2511 sio_timeout = hz > 200 ? hz / 200 : 1;
2518 sio_timeouts_until_log = hz / sio_timeout;
2519 callout_reset(&sio_timeout_handle, sio_timeout,
2522 /* Flush error messages, if any. */
2523 sio_timeouts_until_log = 1;
2524 comwakeup((void *)NULL);
2525 callout_stop(&sio_timeout_handle);
2536 callout_reset(&sio_timeout_handle, sio_timeout, comwakeup, NULL);
2540 * Recover from lost output interrupts.
2541 * Poll any lines that don't use interrupts.
2543 for (unit = 0; unit < NSIO; ++unit) {
2544 com = com_addr(unit);
2546 && (com->state >= (CS_BUSY | CS_TTGO) || com->poll)) {
2555 * Check for and log errors, but not too often.
2557 if (--sio_timeouts_until_log > 0)
2559 sio_timeouts_until_log = hz / sio_timeout;
2560 for (unit = 0; unit < NSIO; ++unit) {
2563 com = com_addr(unit);
2566 for (errnum = 0; errnum < CE_NTYPES; ++errnum) {
2571 delta = com->delta_error_counts[errnum];
2572 com->delta_error_counts[errnum] = 0;
2576 total = com->error_counts[errnum] += delta;
2577 log(LOG_ERR, "cy%d: %u more %s%s (total %lu)\n",
2578 unit, delta, error_desc[errnum],
2579 delta == 1 ? "" : "s", total);
2585 disc_optim(tp, t, com)
2590 #ifndef SOFT_HOTCHAR
2595 * XXX can skip a lot more cases if Smarts. Maybe
2596 * (IGNCR | ISTRIP | IXON) in c_iflag. But perhaps we
2597 * shouldn't skip if (TS_CNTTB | TS_LNCH) is set in t_state.
2599 if (!(t->c_iflag & (ICRNL | IGNCR | IMAXBEL | INLCR | ISTRIP | IXON))
2600 && (!(t->c_iflag & BRKINT) || (t->c_iflag & IGNBRK))
2601 && (!(t->c_iflag & PARMRK)
2602 || (t->c_iflag & (IGNPAR | IGNBRK)) == (IGNPAR | IGNBRK))
2603 && !(t->c_lflag & (ECHO | ICANON | IEXTEN | ISIG | PENDIN))
2604 && linesw[tp->t_line].l_rint == ttyinput)
2605 tp->t_state |= TS_CAN_BYPASS_L_RINT;
2607 tp->t_state &= ~TS_CAN_BYPASS_L_RINT;
2608 com->hotchar = linesw[tp->t_line].l_hotchar;
2609 #ifndef SOFT_HOTCHAR
2610 opt = com->cor[2] & ~CD1400_COR3_SCD34;
2611 if (com->hotchar != 0) {
2612 cd_setreg(com, CD1400_SCHR3, com->hotchar);
2613 cd_setreg(com, CD1400_SCHR4, com->hotchar);
2614 opt |= CD1400_COR3_SCD34;
2616 if (opt != com->cor[2]) {
2617 cd_setreg(com, CD1400_COR3, com->cor[2] = opt);
2618 cd1400_channel_cmd(com, CD1400_CCR_CMDCORCHG | CD1400_CCR_COR3);
2624 /* standard line discipline input routine */
2630 /* XXX duplicate ttyinput(), but without the IXOFF/IXON/ISTRIP/IPARMRK
2631 * bits, as they are done by the CD1400. Hardly worth the effort,
2632 * given that high-throughput sessions are raw anyhow.
2638 comspeed(speed, cy_clock, prescaler_io)
2651 if (speed < 0 || speed > 150000)
2654 /* determine which prescaler to use */
2655 for (prescaler_unit = 4, prescaler = 2048; prescaler_unit;
2656 prescaler_unit--, prescaler >>= 2) {
2657 if (cy_clock / prescaler / speed > 63)
2661 divider = (cy_clock / prescaler * 2 / speed + 1) / 2; /* round off */
2664 actual = cy_clock/prescaler/divider;
2666 /* 10 times error in percent: */
2667 error = ((actual - (long)speed) * 2000 / (long)speed + 1) / 2;
2669 /* 3.0% max error tolerance */
2670 if (error < -30 || error > 30)
2674 printf("prescaler = %d (%d)\n", prescaler, prescaler_unit);
2675 printf("divider = %d (%x)\n", divider, divider);
2676 printf("actual = %d\n", actual);
2677 printf("error = %d\n", error);
2680 *prescaler_io = prescaler_unit;
2685 cd1400_channel_cmd(com, cmd)
2689 cd1400_channel_cmd_wait(com);
2690 cd_setreg(com, CD1400_CCR, cmd);
2691 cd1400_channel_cmd_wait(com);
2695 cd1400_channel_cmd_wait(com)
2698 struct timeval start;
2702 if (cd_getreg(com, CD1400_CCR) == 0)
2706 if (cd_getreg(com, CD1400_CCR) == 0)
2709 usec = 1000000 * (tv.tv_sec - start.tv_sec) +
2710 tv.tv_usec - start.tv_usec;
2713 "cy%d: channel command timeout (%ld usec)\n",
2726 * We can't change the hardware's ETC state while there are any
2727 * characters in the tx fifo, since those characters would be
2728 * interpreted as commands! Unputting characters from the fifo
2729 * is difficult, so we wait up to 12 character times for the fifo
2730 * to drain. The command will be delayed for up to 2 character
2731 * times for the tx to become empty. Unputting characters from
2732 * the tx holding and shift registers is impossible, so we wait
2733 * for the tx to become empty so that the command is sure to be
2734 * executed soon after we issue it.
2737 if (com->etc == etc) {
2741 if ((etc == CD1400_ETC_SENDBREAK
2742 && (com->etc == ETC_BREAK_STARTING
2743 || com->etc == ETC_BREAK_STARTED))
2744 || (etc == CD1400_ETC_STOPBREAK
2745 && (com->etc == ETC_BREAK_ENDING || com->etc == ETC_BREAK_ENDED
2746 || com->etc == ETC_NONE))) {
2751 cd_setreg(com, CD1400_SRER,
2753 = (com->intr_enable & ~CD1400_SRER_TXRDY) | CD1400_SRER_TXMPTY);
2756 while (com->etc == etc
2757 && tsleep(&com->etc, PCATCH, "cyetc", 0) == 0)
2766 struct com_s *basecom;
2773 basecom = com_addr(com->unit & ~(CD1400_NO_OF_CHANNELS - 1));
2774 car = com->unit & CD1400_CAR_CHAN;
2775 cy_align = com->cy_align;
2776 iobase = com->iobase;
2780 if (basecom->car != car)
2781 cd_outb(iobase, CD1400_CAR, cy_align, basecom->car = car);
2782 val = cd_inb(iobase, reg, cy_align);
2789 cd_setreg(com, reg, val)
2794 struct com_s *basecom;
2800 basecom = com_addr(com->unit & ~(CD1400_NO_OF_CHANNELS - 1));
2801 car = com->unit & CD1400_CAR_CHAN;
2802 cy_align = com->cy_align;
2803 iobase = com->iobase;
2807 if (basecom->car != car)
2808 cd_outb(iobase, CD1400_CAR, cy_align, basecom->car = car);
2809 cd_outb(iobase, reg, cy_align, val);
2825 com = com_addr(unit);
2826 printf("info for channel %d\n", unit);
2827 printf("------------------\n");
2828 printf("total cyclom service probes:\t%d\n", cy_svrr_probes);
2829 printf("calls to upper layer:\t\t%d\n", cy_timeouts);
2832 iobase = com->iobase;
2834 printf("cd1400 base address:\\tt%p\n", iobase);
2835 printf("saved channel_control:\t\t0x%02x\n", com->channel_control);
2836 printf("saved cor1-3:\t\t\t0x%02x 0x%02x 0x%02x\n",
2837 com->cor[0], com->cor[1], com->cor[2]);
2838 printf("service request enable reg:\t0x%02x (0x%02x cached)\n",
2839 cd_getreg(com, CD1400_SRER), com->intr_enable);
2840 printf("service request register:\t0x%02x\n",
2841 cd_inb(iobase, CD1400_SVRR, com->cy_align));
2842 printf("modem status:\t\t\t0x%02x (0x%02x cached)\n",
2843 cd_getreg(com, CD1400_MSVR2), com->prev_modem_status);
2844 printf("rx/tx/mdm interrupt registers:\t0x%02x 0x%02x 0x%02x\n",
2845 cd_inb(iobase, CD1400_RIR, com->cy_align),
2846 cd_inb(iobase, CD1400_TIR, com->cy_align),
2847 cd_inb(iobase, CD1400_MIR, com->cy_align));
2849 printf("com state:\t\t\t0x%02x\n", com->state);
2850 printf("calls to comstart():\t\t%d (%d useful)\n",
2851 com->start_count, com->start_real);
2852 printf("rx buffer chars free:\t\t%d\n", com->iptr - com->ibuf);
2854 if (com->obufs[0].l_queued)
2855 ocount += com->obufs[0].l_tail - com->obufs[0].l_head;
2856 if (com->obufs[1].l_queued)
2857 ocount += com->obufs[1].l_tail - com->obufs[1].l_head;
2858 printf("tx buffer chars:\t\t%u\n", ocount);
2859 printf("received chars:\t\t\t%d\n", com->bytes_in);
2860 printf("received exceptions:\t\t%d\n", com->recv_exception);
2861 printf("modem signal deltas:\t\t%d\n", com->mdm);
2862 printf("transmitted chars:\t\t%d\n", com->bytes_out);
2866 printf("tty state:\t\t\t0x%08x\n", tp->t_state);
2868 "upper layer queue lengths:\t%d raw, %d canon, %d output\n",
2869 tp->t_rawq.c_cc, tp->t_canq.c_cc, tp->t_outq.c_cc);
2871 printf("tty state:\t\t\tclosed\n");
2873 #endif /* CyDebug */