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 1.16 2005/06/08 08:25:50 okumoto 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);
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 cdevsw sio_cdevsw = {
384 /* name */ driver_name,
385 /* maj */ CDEV_MAJOR,
386 /* flags */ D_TTY | D_KQFILTER,
391 /* close */ sioclose,
393 /* write */ siowrite,
394 /* ioctl */ sioioctl,
397 /* strategy */ nostrategy,
400 /* kqfilter */ ttykqfilter
403 static int comconsole = -1;
404 static speed_t comdefaultrate = TTYDEF_SPEED;
405 static u_int com_events; /* input chars + weighted output completions */
406 static bool_t sio_registered;
407 static int sio_timeout;
408 static int sio_timeouts_until_log;
409 static struct callout sio_timeout_handle;
411 static struct tty *sio_tty[NSIO];
413 static struct tty sio_tty[NSIO];
415 static const int nsio_tty = NSIO;
418 static u_int cd_inbs;
419 static u_int cy_inbs;
420 static u_int cd_outbs;
421 static u_int cy_outbs;
422 static u_int cy_svrr_probes;
423 static u_int cy_timeouts;
426 static int cy_chip_offset[] = {
427 0x0000, 0x0400, 0x0800, 0x0c00, 0x0200, 0x0600, 0x0a00, 0x0e00,
429 static int cy_nr_cd1400s[NCY];
430 static int cy_total_devices;
431 #undef RxFifoThreshold
432 static int volatile RxFifoThreshold = (CD1400_RX_FIFO_SIZE / 2);
436 struct isa_device *dev;
440 iobase = (cy_addr)dev->id_maddr;
442 /* Cyclom-16Y hardware reset (Cyclom-8Ys don't care) */
443 cy_inb(iobase, CY16_RESET, 0); /* XXX? */
444 DELAY(500); /* wait for the board to get its act together */
446 /* this is needed to get the board out of reset */
447 cy_outb(iobase, CY_CLEAR_INTR, 0, 0);
450 return (cy_units(iobase, 0) == 0 ? 0 : -1);
454 cy_units(cy_iobase, cy_align)
459 u_char firmware_version = 0; /* assign to avoid warning */
463 for (cyu = 0; cyu < CY_MAX_CD1400s; ++cyu) {
464 iobase = cy_iobase + (cy_chip_offset[cyu] << cy_align);
466 /* wait for chip to become ready for new command */
467 for (i = 0; i < 10; i++) {
469 if (!cd_inb(iobase, CD1400_CCR, cy_align))
473 /* clear the GFRCR register */
474 cd_outb(iobase, CD1400_GFRCR, cy_align, 0);
476 /* issue a reset command */
477 cd_outb(iobase, CD1400_CCR, cy_align,
478 CD1400_CCR_CMDRESET | CD1400_CCR_FULLRESET);
480 /* wait for the CD1400 to initialize itself */
481 for (i = 0; i < 200; i++) {
484 /* retrieve firmware version */
485 firmware_version = cd_inb(iobase, CD1400_GFRCR,
487 if ((firmware_version & 0xf0) == 0x40)
492 * Anything in the 0x40-0x4F range is fine.
493 * If one CD1400 is bad then we don't support higher
494 * numbered good ones on this board.
496 if ((firmware_version & 0xf0) != 0x40)
504 struct isa_device *isdp;
508 adapter = cyattach_common((cy_addr) isdp->id_maddr, 0);
514 * This kludge is to allow ISA/PCI device specifications in the
515 * kernel config file to be in any order.
517 if (isdp->id_unit != adapter) {
518 printf("cy%d: attached as cy%d\n", isdp->id_unit, adapter);
519 isdp->id_unit = adapter; /* XXX */
521 isdp->id_ointr = siointr;
522 /* isdp->id_ri_flags |= RI_FAST; XXX unimplemented - use newbus! */
527 cyattach_common(cy_iobase, cy_align)
533 u_char firmware_version;
539 adapter = cy_total_devices;
540 if ((u_int)adapter >= NCY) {
542 "cy%d: can't attach adapter: insufficient cy devices configured\n",
546 ncyu = cy_units(cy_iobase, cy_align);
549 cy_nr_cd1400s[adapter] = ncyu;
552 unit = adapter * CY_MAX_PORTS;
553 for (cyu = 0; cyu < ncyu; ++cyu) {
556 iobase = (cy_addr) (cy_iobase
557 + (cy_chip_offset[cyu] << cy_align));
558 firmware_version = cd_inb(iobase, CD1400_GFRCR, cy_align);
560 /* Set up a receive timeout period of than 1+ ms. */
561 cd_outb(iobase, CD1400_PPR, cy_align,
562 howmany(CY_CLOCK(firmware_version)
563 / CD1400_PPR_PRESCALER, 1000));
565 for (cdu = 0; cdu < CD1400_NO_OF_CHANNELS; ++cdu, ++unit) {
568 com = malloc(sizeof *com, M_DEVBUF, M_WAITOK | M_ZERO);
570 callout_init(&com->dtr_ch);
571 com->gfrcr_image = firmware_version;
572 if (CY_RTS_DTR_SWAPPED(firmware_version)) {
573 com->mcr_dtr = MCR_RTS;
574 com->mcr_rts = MCR_DTR;
575 com->mcr_rts_reg = CD1400_MSVR2;
577 com->mcr_dtr = MCR_DTR;
578 com->mcr_rts = MCR_RTS;
579 com->mcr_rts_reg = CD1400_MSVR1;
581 com->dtr_wait = 3 * hz;
582 com->obufs[0].l_head = com->obuf1;
583 com->obufs[1].l_head = com->obuf2;
585 com->cy_align = cy_align;
586 com->cy_iobase = cy_iobase;
587 com->iobase = iobase;
588 com->car = ~CD1400_CAR_CHAN;
591 * We don't use all the flags from <sys/ttydefaults.h> since they
592 * are only relevant for logins. It's important to have echo off
593 * initially so that the line doesn't start blathering before the
594 * echo flag can be turned off.
596 com->it_in.c_iflag = 0;
597 com->it_in.c_oflag = 0;
598 com->it_in.c_cflag = TTYDEF_CFLAG;
599 com->it_in.c_lflag = 0;
600 if (unit == comconsole) {
601 com->it_in.c_iflag = TTYDEF_IFLAG;
602 com->it_in.c_oflag = TTYDEF_OFLAG;
603 com->it_in.c_cflag = TTYDEF_CFLAG | CLOCAL;
604 com->it_in.c_lflag = TTYDEF_LFLAG;
605 com->lt_out.c_cflag = com->lt_in.c_cflag = CLOCAL;
607 if (siosetwater(com, com->it_in.c_ispeed) != 0) {
613 termioschars(&com->it_in);
614 com->it_in.c_ispeed = com->it_in.c_ospeed = comdefaultrate;
615 com->it_out = com->it_in;
618 com_addr(unit) = com;
621 if (!sio_registered) {
622 callout_init(&sio_timeout_handle);
623 register_swi(SWI_TTY, siopoll, NULL, "cy", NULL);
624 sio_registered = TRUE;
626 minorbase = UNIT_TO_MINOR(unit);
627 cdevsw_add(&sio_cdevsw, UNIT_TO_MINOR(-1), minorbase);
628 make_dev(&sio_cdevsw, minorbase,
629 UID_ROOT, GID_WHEEL, 0600, "ttyc%r%r", adapter,
630 unit % CY_MAX_PORTS);
631 make_dev(&sio_cdevsw, minorbase | CONTROL_INIT_STATE,
632 UID_ROOT, GID_WHEEL, 0600, "ttyic%r%r", adapter,
633 unit % CY_MAX_PORTS);
634 make_dev(&sio_cdevsw, minorbase | CONTROL_LOCK_STATE,
635 UID_ROOT, GID_WHEEL, 0600, "ttylc%r%r", adapter,
636 unit % CY_MAX_PORTS);
637 make_dev(&sio_cdevsw, minorbase | CALLOUT_MASK,
638 UID_UUCP, GID_DIALER, 0660, "cuac%r%r", adapter,
639 unit % CY_MAX_PORTS);
640 make_dev(&sio_cdevsw, minorbase | CALLOUT_MASK | CONTROL_INIT_STATE,
641 UID_UUCP, GID_DIALER, 0660, "cuaic%r%r", adapter,
642 unit % CY_MAX_PORTS);
643 make_dev(&sio_cdevsw, minorbase | CALLOUT_MASK | CONTROL_LOCK_STATE,
644 UID_UUCP, GID_DIALER, 0660, "cualc%r%r", adapter,
645 unit % CY_MAX_PORTS);
647 /* for(cdu...), for(cyu...) terminating blocks */
651 /* ensure an edge for the next interrupt */
652 cy_outb(cy_iobase, CY_CLEAR_INTR, cy_align, 0);
658 sioopen(dev_t dev, int flag, int mode, struct thread *td)
667 unit = MINOR_TO_UNIT(mynor);
668 if ((u_int) unit >= NSIO || (com = com_addr(unit)) == NULL)
670 if (mynor & CONTROL_MASK)
673 tp = com->tp = sio_tty[unit] = ttymalloc(sio_tty[unit]);
675 tp = com->tp = &sio_tty[unit];
680 * We jump to this label after all non-interrupted sleeps to pick
681 * up any changes of the device state.
684 while (com->state & CS_DTR_OFF) {
685 error = tsleep(&com->dtr_wait, PCATCH, "cydtr", 0);
689 if (tp->t_state & TS_ISOPEN) {
691 * The device is open, so everything has been initialized.
694 if (mynor & CALLOUT_MASK) {
695 if (!com->active_out) {
700 if (com->active_out) {
701 if (flag & O_NONBLOCK) {
705 error = tsleep(&com->active_out,
712 if (tp->t_state & TS_XCLUDE &&
719 * The device isn't open, so there are no conflicts.
720 * Initialize it. Initialization is done twice in many
721 * cases: to preempt sleeping callin opens if we are
722 * callout, and to complete a callin open after DCD rises.
724 tp->t_oproc = comstart;
725 tp->t_stop = comstop;
726 tp->t_param = comparam;
728 tp->t_termios = mynor & CALLOUT_MASK
729 ? com->it_out : com->it_in;
731 /* Encode per-board unit in LIVR for access in intr routines. */
732 cd_setreg(com, CD1400_LIVR,
733 (unit & CD1400_xIVR_CHAN) << CD1400_xIVR_CHAN_SHIFT);
735 (void)commctl(com, TIOCM_DTR | TIOCM_RTS, DMSET);
737 com->poll = com->no_irq;
738 com->poll_output = com->loses_outints;
741 error = comparam(tp, &tp->t_termios);
748 * (Re)enable and flush fifos.
750 * Certain SMC chips cause problems if the fifos
751 * are enabled while input is ready. Turn off the
752 * fifo if necessary to clear the input. We test
753 * the input ready bit after enabling the fifos
754 * since we've already enabled them in comparam()
755 * and to handle races between enabling and fresh
759 outb(iobase + com_fifo,
760 FIFO_RCV_RST | FIFO_XMT_RST
763 if (!(inb(com->line_status_port) & LSR_RXRDY))
765 outb(iobase + com_fifo, 0);
767 (void) inb(com->data_port);
772 (void) inb(com->line_status_port);
773 (void) inb(com->data_port);
774 com->prev_modem_status = com->last_modem_status
775 = inb(com->modem_status_port);
776 outb(iobase + com_ier, IER_ERXRDY | IER_ETXRDY | IER_ERLS
781 * Flush fifos. This requires a full channel reset which
782 * also disables the transmitter and receiver. Recover
785 cd1400_channel_cmd(com,
786 CD1400_CCR_CMDRESET | CD1400_CCR_CHANRESET);
787 cd1400_channel_cmd(com, com->channel_control);
790 com->prev_modem_status = com->last_modem_status
791 = cd_getreg(com, CD1400_MSVR2);
792 cd_setreg(com, CD1400_SRER,
794 = CD1400_SRER_MDMCH | CD1400_SRER_RXDATA);
798 * Handle initial DCD. Callout devices get a fake initial
799 * DCD (trapdoor DCD). If we are callout, then any sleeping
800 * callin opens get woken up and resume sleeping on "cybi"
801 * instead of "cydcd".
804 * XXX `mynor & CALLOUT_MASK' should be
805 * `tp->t_cflag & (SOFT_CARRIER | TRAPDOOR_CARRIER) where
806 * TRAPDOOR_CARRIER is the default initial state for callout
807 * devices and SOFT_CARRIER is like CLOCAL except it hides
810 if (com->prev_modem_status & MSR_DCD || mynor & CALLOUT_MASK)
811 (*linesw[tp->t_line].l_modem)(tp, 1);
814 * Wait for DCD if necessary.
816 if (!(tp->t_state & TS_CARR_ON) && !(mynor & CALLOUT_MASK)
817 && !(tp->t_cflag & CLOCAL) && !(flag & O_NONBLOCK)) {
819 error = tsleep(TSA_CARR_ON(tp), PCATCH, "cydcd", 0);
825 error = (*linesw[tp->t_line].l_open)(dev, tp);
826 disc_optim(tp, &tp->t_termios, com);
827 if (tp->t_state & TS_ISOPEN && mynor & CALLOUT_MASK)
828 com->active_out = TRUE;
832 if (!(tp->t_state & TS_ISOPEN) && com->wopeners == 0)
838 sioclose(dev_t dev, int flag, int mode, struct thread *td)
845 if (mynor & CONTROL_MASK)
847 com = com_addr(MINOR_TO_UNIT(mynor));
850 cd_etc(com, CD1400_ETC_STOPBREAK);
851 (*linesw[tp->t_line].l_close)(tp, flag);
852 disc_optim(tp, &tp->t_termios, com);
853 comstop(tp, FREAD | FWRITE);
858 #ifdef broken /* session holds a ref to the tty; can't deallocate */
860 com->tp = sio_tty[unit] = NULL;
874 iobase = com->iobase;
878 com->poll_output = FALSE;
880 com->do_timestamp = 0;
882 outb(iobase + com_cfcr, com->cfcr_image &= ~CFCR_SBREAK);
887 cd_setreg(com, CD1400_COR2, com->cor[1] &= ~CD1400_COR2_ETC);
889 cd1400_channel_cmd(com, CD1400_CCR_CMDRESET | CD1400_CCR_FTF);
894 outb(iobase + com_ier, 0);
897 cd_setreg(com, CD1400_SRER, com->intr_enable = 0);
901 if ((tp->t_cflag & HUPCL)
903 * XXX we will miss any carrier drop between here and the
904 * next open. Perhaps we should watch DCD even when the
905 * port is closed; it is not sufficient to check it at
906 * the next open because it might go up and down while
907 * we're not watching.
910 && !(com->prev_modem_status & MSR_DCD)
911 && !(com->it_in.c_cflag & CLOCAL))
912 || !(tp->t_state & TS_ISOPEN)) {
913 (void)commctl(com, TIOCM_DTR, DMBIC);
915 /* Disable receiver (leave transmitter enabled). */
916 com->channel_control = CD1400_CCR_CMDCHANCTL
919 cd1400_channel_cmd(com, com->channel_control);
921 if (com->dtr_wait != 0 && !(com->state & CS_DTR_OFF)) {
922 callout_reset(&com->dtr_ch, com->dtr_wait,
924 com->state |= CS_DTR_OFF;
931 * Disable fifos so that they are off after controlled
932 * reboots. Some BIOSes fail to detect 16550s when the
935 outb(iobase + com_fifo, 0);
938 com->active_out = FALSE;
939 wakeup(&com->active_out);
940 wakeup(TSA_CARR_ON(tp)); /* restart any wopeners */
945 siowrite(dev, uio, flag)
955 if (mynor & CONTROL_MASK)
958 unit = MINOR_TO_UNIT(mynor);
959 tp = com_addr(unit)->tp;
961 * (XXX) We disallow virtual consoles if the physical console is
962 * a serial port. This is in case there is a display attached that
963 * is not the console. In that situation we don't need/want the X
964 * server taking over the console.
966 if (constty != NULL && unit == comconsole)
969 /* XXX duplicate ttwrite(), but without so much output processing on
970 * CR & LF chars. Hardly worth the effort, given that high-throughput
971 * sessions are raw anyhow.
974 return ((*linesw[tp->t_line].l_write)(tp, uio, flag));
984 com = (struct com_s *)chan;
985 com->state &= ~CS_DTR_OFF;
986 wakeup(&com->dtr_wait);
1001 if (!(tp->t_state & TS_ISOPEN)) {
1002 com_events -= (com->iptr - com->ibuf);
1003 com->iptr = com->ibuf;
1006 if (tp->t_state & TS_CAN_BYPASS_L_RINT) {
1008 * Avoid the grotesquely inefficient lineswitch routine
1009 * (ttyinput) in "raw" mode. It usually takes about 450
1010 * instructions (that's without canonical processing or echo!).
1011 * slinput is reasonably fast (usually 40 instructions plus
1016 incc = com->iptr - buf;
1017 if (tp->t_rawq.c_cc + incc > tp->t_ihiwat
1018 && (com->state & CS_RTS_IFLOW
1019 || tp->t_iflag & IXOFF)
1020 && !(tp->t_state & TS_TBLOCK))
1022 com->delta_error_counts[CE_TTY_BUF_OVERFLOW]
1023 += b_to_q((char *)buf, incc, &tp->t_rawq);
1027 tp->t_rawcc += incc;
1029 if (tp->t_state & TS_TTSTOP
1030 && (tp->t_iflag & IXANY
1031 || tp->t_cc[VSTART] == tp->t_cc[VSTOP])) {
1032 tp->t_state &= ~TS_TTSTOP;
1033 tp->t_lflag &= ~FLUSHO;
1037 } while (buf < com->iptr);
1041 line_status = buf[com->ierroff];
1044 & (LSR_BI | LSR_FE | LSR_OE | LSR_PE)) {
1045 if (line_status & LSR_BI)
1046 recv_data |= TTY_BI;
1047 if (line_status & LSR_FE)
1048 recv_data |= TTY_FE;
1049 if (line_status & LSR_OE)
1050 recv_data |= TTY_OE;
1051 if (line_status & LSR_PE)
1052 recv_data |= TTY_PE;
1054 (*linesw[tp->t_line].l_rint)(recv_data, tp);
1056 } while (buf < com->iptr);
1058 com_events -= (com->iptr - com->ibuf);
1059 com->iptr = com->ibuf;
1062 * There is now room for another low-level buffer full of input,
1063 * so enable RTS if it is now disabled and there is room in the
1064 * high-level buffer.
1066 if ((com->state & CS_RTS_IFLOW) && !(com->mcr_image & com->mcr_rts) &&
1067 !(tp->t_state & TS_TBLOCK))
1069 outb(com->modem_ctl_port, com->mcr_image |= MCR_RTS);
1071 cd_setreg(com, com->mcr_rts_reg,
1072 com->mcr_image |= com->mcr_rts);
1087 com_lock(); /* XXX could this be placed down lower in the loop? */
1089 baseu = unit * CY_MAX_PORTS;
1090 cy_align = com_addr(baseu)->cy_align;
1091 cy_iobase = com_addr(baseu)->cy_iobase;
1093 /* check each CD1400 in turn */
1094 for (cyu = 0; cyu < cy_nr_cd1400s[unit]; ++cyu) {
1095 iobase = (cy_addr) (cy_iobase
1096 + (cy_chip_offset[cyu] << cy_align));
1097 /* poll to see if it has any work */
1098 status = cd_inb(iobase, CD1400_SVRR, cy_align);
1104 /* service requests as appropriate, giving priority to RX */
1105 if (status & CD1400_SVRR_RXRDY) {
1117 save_rir = cd_inb(iobase, CD1400_RIR, cy_align);
1119 /* enter rx service */
1120 cd_outb(iobase, CD1400_CAR, cy_align, save_rir);
1121 com_addr(baseu + cyu * CD1400_NO_OF_CHANNELS)->car
1122 = save_rir & CD1400_CAR_CHAN;
1124 serv_type = cd_inb(iobase, CD1400_RIVR, cy_align);
1125 com = com_addr(baseu
1126 + ((serv_type >> CD1400_xIVR_CHAN_SHIFT)
1127 & CD1400_xIVR_CHAN));
1129 /* ack receive service */
1130 serv_type = cy_inb(iobase, CY8_SVCACKR, cy_align);
1132 com = com_addr(baseu +
1133 + ((serv_type >> CD1400_xIVR_CHAN_SHIFT)
1134 & CD1400_xIVR_CHAN));
1137 if (serv_type & CD1400_RIVR_EXCEPTION) {
1138 ++com->recv_exception;
1139 line_status = cd_inb(iobase, CD1400_RDSR, cy_align);
1140 /* break/unnattached error bits or real input? */
1141 recv_data = cd_inb(iobase, CD1400_RDSR, cy_align);
1142 #ifndef SOFT_HOTCHAR
1143 if (line_status & CD1400_RDSR_SPECIAL
1144 && com->hotchar != 0)
1147 #if 1 /* XXX "intelligent" PFO error handling would break O error handling */
1148 if (line_status & (LSR_PE|LSR_FE|LSR_BI)) {
1150 Don't store PE if IGNPAR and BI if IGNBRK,
1151 this hack allows "raw" tty optimization
1152 works even if IGN* is set.
1154 if ( com->tp == NULL
1155 || !(com->tp->t_state & TS_ISOPEN)
1156 || ((line_status & (LSR_PE|LSR_FE))
1157 && (com->tp->t_iflag & IGNPAR))
1158 || ((line_status & LSR_BI)
1159 && (com->tp->t_iflag & IGNBRK)))
1161 if ( (line_status & (LSR_PE|LSR_FE))
1162 && (com->tp->t_state & TS_CAN_BYPASS_L_RINT)
1163 && ((line_status & LSR_FE)
1164 || ((line_status & LSR_PE)
1165 && (com->tp->t_iflag & INPCK))))
1171 if (com->hotchar != 0 && recv_data == com->hotchar)
1175 if (ioptr >= com->ibufend)
1176 CE_RECORD(com, CE_INTERRUPT_BUF_OVERFLOW);
1178 if (com->do_timestamp)
1179 microtime(&com->timestamp);
1181 ioptr[0] = recv_data;
1182 ioptr[com->ierroff] = line_status;
1183 com->iptr = ++ioptr;
1184 if (ioptr == com->ihighwater
1185 && com->state & CS_RTS_IFLOW)
1187 outb(com->modem_ctl_port,
1188 com->mcr_image &= ~MCR_RTS);
1190 cd_outb(iobase, com->mcr_rts_reg,
1195 if (line_status & LSR_OE)
1196 CE_RECORD(com, CE_OVERRUN);
1202 count = cd_inb(iobase, CD1400_RDCR, cy_align);
1205 com->bytes_in += count;
1207 ifree = com->ibufend - ioptr;
1208 if (count > ifree) {
1210 com_events += ifree;
1212 if (com->do_timestamp)
1213 microtime(&com->timestamp);
1215 recv_data = cd_inb(iobase,
1219 if (com->hotchar != 0
1224 ioptr[0] = recv_data;
1225 ioptr[com->ierroff] = 0;
1227 } while (--ifree != 0);
1229 com->delta_error_counts
1230 [CE_INTERRUPT_BUF_OVERFLOW] += count;
1232 recv_data = cd_inb(iobase, CD1400_RDSR,
1235 if (com->hotchar != 0
1236 && recv_data == com->hotchar)
1239 } while (--count != 0);
1241 if (com->do_timestamp)
1242 microtime(&com->timestamp);
1243 if (ioptr <= com->ihighwater
1244 && ioptr + count > com->ihighwater
1245 && com->state & CS_RTS_IFLOW)
1247 outb(com->modem_ctl_port,
1248 com->mcr_image &= ~MCR_RTS);
1250 cd_outb(iobase, com->mcr_rts_reg,
1255 com_events += count;
1257 recv_data = cd_inb(iobase, CD1400_RDSR,
1260 if (com->hotchar != 0
1261 && recv_data == com->hotchar)
1264 ioptr[0] = recv_data;
1265 ioptr[com->ierroff] = 0;
1267 } while (--count != 0);
1273 /* terminate service context */
1275 cd_outb(iobase, CD1400_RIR, cy_align,
1277 & ~(CD1400_RIR_RDIREQ | CD1400_RIR_RBUSY));
1279 cd_outb(iobase, CD1400_EOSRR, cy_align, 0);
1282 if (status & CD1400_SVRR_MDMCH) {
1284 u_char modem_status;
1292 save_mir = cd_inb(iobase, CD1400_MIR, cy_align);
1294 /* enter modem service */
1295 cd_outb(iobase, CD1400_CAR, cy_align, save_mir);
1296 com_addr(baseu + cyu * CD1400_NO_OF_CHANNELS)->car
1297 = save_mir & CD1400_CAR_CHAN;
1299 com = com_addr(baseu + cyu * CD1400_NO_OF_CHANNELS
1300 + (save_mir & CD1400_MIR_CHAN));
1302 /* ack modem service */
1303 vector = cy_inb(iobase, CY8_SVCACKM, cy_align);
1305 com = com_addr(baseu
1306 + ((vector >> CD1400_xIVR_CHAN_SHIFT)
1307 & CD1400_xIVR_CHAN));
1310 modem_status = cd_inb(iobase, CD1400_MSVR2, cy_align);
1311 if (modem_status != com->last_modem_status) {
1312 if (com->do_dcd_timestamp
1313 && !(com->last_modem_status & MSR_DCD)
1314 && modem_status & MSR_DCD)
1315 microtime(&com->dcd_timestamp);
1318 * Schedule high level to handle DCD changes. Note
1319 * that we don't use the delta bits anywhere. Some
1320 * UARTs mess them up, and it's easy to remember the
1321 * previous bits and calculate the delta.
1323 com->last_modem_status = modem_status;
1324 if (!(com->state & CS_CHECKMSR)) {
1325 com_events += LOTS_OF_EVENTS;
1326 com->state |= CS_CHECKMSR;
1330 #ifdef SOFT_CTS_OFLOW
1331 /* handle CTS change immediately for crisp flow ctl */
1332 if (com->state & CS_CTS_OFLOW) {
1333 if (modem_status & MSR_CTS) {
1334 com->state |= CS_ODEVREADY;
1335 if (com->state >= (CS_BUSY | CS_TTGO
1337 && !(com->intr_enable
1338 & CD1400_SRER_TXRDY))
1339 cd_outb(iobase, CD1400_SRER,
1343 & ~CD1400_SRER_TXMPTY
1344 | CD1400_SRER_TXRDY);
1346 com->state &= ~CS_ODEVREADY;
1347 if (com->intr_enable
1348 & CD1400_SRER_TXRDY)
1349 cd_outb(iobase, CD1400_SRER,
1353 & ~CD1400_SRER_TXRDY
1354 | CD1400_SRER_TXMPTY);
1360 /* terminate service context */
1362 cd_outb(iobase, CD1400_MIR, cy_align,
1364 & ~(CD1400_MIR_RDIREQ | CD1400_MIR_RBUSY));
1366 cd_outb(iobase, CD1400_EOSRR, cy_align, 0);
1369 if (status & CD1400_SVRR_TXRDY) {
1378 save_tir = cd_inb(iobase, CD1400_TIR, cy_align);
1380 /* enter tx service */
1381 cd_outb(iobase, CD1400_CAR, cy_align, save_tir);
1382 com_addr(baseu + cyu * CD1400_NO_OF_CHANNELS)->car
1383 = save_tir & CD1400_CAR_CHAN;
1385 com = com_addr(baseu
1386 + cyu * CD1400_NO_OF_CHANNELS
1387 + (save_tir & CD1400_TIR_CHAN));
1389 /* ack transmit service */
1390 vector = cy_inb(iobase, CY8_SVCACKT, cy_align);
1392 com = com_addr(baseu
1393 + ((vector >> CD1400_xIVR_CHAN_SHIFT)
1394 & CD1400_xIVR_CHAN));
1397 if (com->etc != ETC_NONE) {
1398 if (com->intr_enable & CD1400_SRER_TXRDY) {
1400 * Here due to sloppy SRER_TXRDY
1401 * enabling. Ignore. Come back when
1404 cd_outb(iobase, CD1400_SRER, cy_align,
1407 & ~CD1400_SRER_TXRDY)
1408 | CD1400_SRER_TXMPTY);
1409 goto terminate_tx_service;
1412 case CD1400_ETC_SENDBREAK:
1413 case CD1400_ETC_STOPBREAK:
1415 * Start the command. Come back on
1416 * next tx empty interrupt, hopefully
1417 * after command has been executed.
1419 cd_outb(iobase, CD1400_COR2, cy_align,
1420 com->cor[1] |= CD1400_COR2_ETC);
1421 cd_outb(iobase, CD1400_TDR, cy_align,
1423 cd_outb(iobase, CD1400_TDR, cy_align,
1425 if (com->etc == CD1400_ETC_SENDBREAK)
1426 com->etc = ETC_BREAK_STARTING;
1428 com->etc = ETC_BREAK_ENDING;
1429 goto terminate_tx_service;
1430 case ETC_BREAK_STARTING:
1432 * BREAK is now on. Continue with
1433 * SRER_TXMPTY processing, hopefully
1436 com->etc = ETC_BREAK_STARTED;
1438 case ETC_BREAK_STARTED:
1440 * Came back due to sloppy SRER_TXMPTY
1441 * enabling. Hope again.
1444 case ETC_BREAK_ENDING:
1446 * BREAK is now off. Continue with
1447 * SRER_TXMPTY processing and don't
1448 * come back. The SWI handler will
1449 * restart tx interrupts if necessary.
1451 cd_outb(iobase, CD1400_COR2, cy_align,
1453 &= ~CD1400_COR2_ETC);
1454 com->etc = ETC_BREAK_ENDED;
1455 if (!(com->state & CS_ODONE)) {
1456 com_events += LOTS_OF_EVENTS;
1457 com->state |= CS_ODONE;
1461 case ETC_BREAK_ENDED:
1463 * Shouldn't get here. Hope again.
1468 if (com->intr_enable & CD1400_SRER_TXMPTY) {
1469 if (!(com->extra_state & CSE_ODONE)) {
1470 com_events += LOTS_OF_EVENTS;
1471 com->extra_state |= CSE_ODONE;
1474 cd_outb(iobase, CD1400_SRER, cy_align,
1476 &= ~CD1400_SRER_TXMPTY);
1477 goto terminate_tx_service;
1479 if (com->state >= (CS_BUSY | CS_TTGO | CS_ODEVREADY)) {
1483 ioptr = com->obufq.l_head;
1484 ocount = com->obufq.l_tail - ioptr;
1485 if (ocount > CD1400_TX_FIFO_SIZE)
1486 ocount = CD1400_TX_FIFO_SIZE;
1487 com->bytes_out += ocount;
1489 cd_outb(iobase, CD1400_TDR, cy_align,
1491 while (--ocount != 0);
1492 com->obufq.l_head = ioptr;
1493 if (ioptr >= com->obufq.l_tail) {
1496 qp = com->obufq.l_next;
1497 qp->l_queued = FALSE;
1500 com->obufq.l_head = qp->l_head;
1501 com->obufq.l_tail = qp->l_tail;
1502 com->obufq.l_next = qp;
1504 /* output just completed */
1505 com->state &= ~CS_BUSY;
1508 * The setting of CSE_ODONE may be
1509 * stale here. We currently only
1510 * use it when CS_BUSY is set, and
1511 * fixing it when we clear CS_BUSY
1514 if (com->extra_state & CSE_ODONE) {
1515 com_events -= LOTS_OF_EVENTS;
1516 com->extra_state &= ~CSE_ODONE;
1519 cd_outb(iobase, CD1400_SRER, cy_align,
1522 & ~CD1400_SRER_TXRDY)
1523 | CD1400_SRER_TXMPTY);
1525 if (!(com->state & CS_ODONE)) {
1526 com_events += LOTS_OF_EVENTS;
1527 com->state |= CS_ODONE;
1529 /* handle at high level ASAP */
1535 /* terminate service context */
1536 terminate_tx_service:
1538 cd_outb(iobase, CD1400_TIR, cy_align,
1540 & ~(CD1400_TIR_RDIREQ | CD1400_TIR_RBUSY));
1542 cd_outb(iobase, CD1400_EOSRR, cy_align, 0);
1547 /* ensure an edge for the next interrupt */
1548 cy_outb(cy_iobase, CY_CLEAR_INTR, cy_align, 0);
1564 sioioctl(dev_t dev, u_long cmd, caddr_t data, int flag, struct thread *td)
1570 #if defined(COMPAT_43) || defined(COMPAT_SUNOS)
1572 struct termios term;
1576 com = com_addr(MINOR_TO_UNIT(mynor));
1577 if (mynor & CONTROL_MASK) {
1580 switch (mynor & CONTROL_MASK) {
1581 case CONTROL_INIT_STATE:
1582 ct = mynor & CALLOUT_MASK ? &com->it_out : &com->it_in;
1584 case CONTROL_LOCK_STATE:
1585 ct = mynor & CALLOUT_MASK ? &com->lt_out : &com->lt_in;
1588 return (ENODEV); /* /dev/nodev */
1595 *ct = *(struct termios *)data;
1598 *(struct termios *)data = *ct;
1601 *(int *)data = TTYDISC;
1604 bzero(data, sizeof(struct winsize));
1611 #if defined(COMPAT_43) || defined(COMPAT_SUNOS)
1612 term = tp->t_termios;
1614 error = ttsetcompat(tp, &cmd, data, &term);
1618 data = (caddr_t)&term;
1620 if (cmd == TIOCSETA || cmd == TIOCSETAW || cmd == TIOCSETAF) {
1622 struct termios *dt = (struct termios *)data;
1623 struct termios *lt = mynor & CALLOUT_MASK
1624 ? &com->lt_out : &com->lt_in;
1626 dt->c_iflag = (tp->t_iflag & lt->c_iflag)
1627 | (dt->c_iflag & ~lt->c_iflag);
1628 dt->c_oflag = (tp->t_oflag & lt->c_oflag)
1629 | (dt->c_oflag & ~lt->c_oflag);
1630 dt->c_cflag = (tp->t_cflag & lt->c_cflag)
1631 | (dt->c_cflag & ~lt->c_cflag);
1632 dt->c_lflag = (tp->t_lflag & lt->c_lflag)
1633 | (dt->c_lflag & ~lt->c_lflag);
1634 for (cc = 0; cc < NCCS; ++cc)
1635 if (lt->c_cc[cc] != 0)
1636 dt->c_cc[cc] = tp->t_cc[cc];
1637 if (lt->c_ispeed != 0)
1638 dt->c_ispeed = tp->t_ispeed;
1639 if (lt->c_ospeed != 0)
1640 dt->c_ospeed = tp->t_ospeed;
1642 error = (*linesw[tp->t_line].l_ioctl)(tp, cmd, data, flag, td);
1643 if (error != ENOIOCTL)
1646 error = ttioctl(tp, cmd, data, flag);
1647 disc_optim(tp, &tp->t_termios, com);
1648 if (error != ENOIOCTL) {
1655 outb(iobase + com_cfcr, com->cfcr_image |= CFCR_SBREAK);
1657 cd_etc(com, CD1400_ETC_SENDBREAK);
1662 outb(iobase + com_cfcr, com->cfcr_image &= ~CFCR_SBREAK);
1664 cd_etc(com, CD1400_ETC_STOPBREAK);
1668 (void)commctl(com, TIOCM_DTR, DMBIS);
1671 (void)commctl(com, TIOCM_DTR, DMBIC);
1674 * XXX should disallow changing MCR_RTS if CS_RTS_IFLOW is set. The
1675 * changes get undone on the next call to comparam().
1678 (void)commctl(com, *(int *)data, DMSET);
1681 (void)commctl(com, *(int *)data, DMBIS);
1684 (void)commctl(com, *(int *)data, DMBIC);
1687 *(int *)data = commctl(com, 0, DMGET);
1690 /* must be root since the wait applies to following logins */
1696 com->dtr_wait = *(int *)data * hz / 100;
1699 *(int *)data = com->dtr_wait * 100 / hz;
1702 com->do_timestamp = TRUE;
1703 *(struct timeval *)data = com->timestamp;
1705 case TIOCDCDTIMESTAMP:
1706 com->do_dcd_timestamp = TRUE;
1707 *(struct timeval *)data = com->dcd_timestamp;
1725 if (com_events == 0)
1728 for (unit = 0; unit < NSIO; ++unit) {
1733 com = com_addr(unit);
1739 * XXX forget any events related to closed devices
1740 * (actually never opened devices) so that we don't
1744 incc = com->iptr - com->ibuf;
1745 com->iptr = com->ibuf;
1746 if (com->state & CS_CHECKMSR) {
1747 incc += LOTS_OF_EVENTS;
1748 com->state &= ~CS_CHECKMSR;
1754 "sio%d: %d events for device with no tp\n",
1758 if (com->iptr != com->ibuf) {
1763 if (com->state & CS_CHECKMSR) {
1764 u_char delta_modem_status;
1767 delta_modem_status = com->last_modem_status
1768 ^ com->prev_modem_status;
1769 com->prev_modem_status = com->last_modem_status;
1770 com_events -= LOTS_OF_EVENTS;
1771 com->state &= ~CS_CHECKMSR;
1773 if (delta_modem_status & MSR_DCD)
1774 (*linesw[tp->t_line].l_modem)
1775 (tp, com->prev_modem_status & MSR_DCD);
1777 if (com->extra_state & CSE_ODONE) {
1779 com_events -= LOTS_OF_EVENTS;
1780 com->extra_state &= ~CSE_ODONE;
1782 if (!(com->state & CS_BUSY)) {
1783 tp->t_state &= ~TS_BUSY;
1786 if (com->etc != ETC_NONE) {
1787 if (com->etc == ETC_BREAK_ENDED)
1788 com->etc = ETC_NONE;
1792 if (com->state & CS_ODONE) {
1794 com_events -= LOTS_OF_EVENTS;
1795 com->state &= ~CS_ODONE;
1797 (*linesw[tp->t_line].l_start)(tp);
1799 if (com_events == 0)
1802 if (com_events >= LOTS_OF_EVENTS)
1825 /* do historical conversions */
1826 if (t->c_ispeed == 0)
1827 t->c_ispeed = t->c_ospeed;
1829 unit = DEV_TO_UNIT(tp->t_dev);
1830 com = com_addr(unit);
1832 /* check requested parameters */
1833 cy_clock = CY_CLOCK(com->gfrcr_image);
1834 idivisor = comspeed(t->c_ispeed, cy_clock, &iprescaler);
1837 odivisor = comspeed(t->c_ospeed, cy_clock, &oprescaler);
1841 /* parameters are OK, convert them to the com struct and the device */
1844 (void)commctl(com, TIOCM_DTR, DMBIC); /* hang up line */
1846 (void)commctl(com, TIOCM_DTR, DMBIS);
1849 * This returns with interrupts disabled so that we can complete
1850 * the speed change atomically.
1852 (void) siosetwater(com, t->c_ispeed);
1854 /* XXX we don't actually change the speed atomically. */
1857 if (idivisor != 0) {
1858 cd_setreg(com, CD1400_RBPR, idivisor);
1859 cd_setreg(com, CD1400_RCOR, iprescaler);
1861 if (odivisor != 0) {
1862 cd_setreg(com, CD1400_TBPR, odivisor);
1863 cd_setreg(com, CD1400_TCOR, oprescaler);
1869 * transmitter enable (always set)
1872 opt = CD1400_CCR_CMDCHANCTL | CD1400_CCR_XMTEN
1873 | (cflag & CREAD ? CD1400_CCR_RCVEN : CD1400_CCR_RCVDIS);
1874 if (opt != com->channel_control) {
1875 com->channel_control = opt;
1876 cd1400_channel_cmd(com, opt);
1880 /* set special chars */
1881 /* XXX if one is _POSIX_VDISABLE, can't use some others */
1882 if (t->c_cc[VSTOP] != _POSIX_VDISABLE)
1883 cd_setreg(com, CD1400_SCHR1, t->c_cc[VSTOP]);
1884 if (t->c_cc[VSTART] != _POSIX_VDISABLE)
1885 cd_setreg(com, CD1400_SCHR2, t->c_cc[VSTART]);
1886 if (t->c_cc[VINTR] != _POSIX_VDISABLE)
1887 cd_setreg(com, CD1400_SCHR3, t->c_cc[VINTR]);
1888 if (t->c_cc[VSUSP] != _POSIX_VDISABLE)
1889 cd_setreg(com, CD1400_SCHR4, t->c_cc[VSUSP]);
1893 * set channel option register 1 -
1900 if (cflag & PARENB) {
1902 opt |= CD1400_COR1_PARODD;
1903 opt |= CD1400_COR1_PARNORMAL;
1906 if (!(iflag & INPCK))
1907 opt |= CD1400_COR1_NOINPCK;
1910 if (cflag & CSTOPB) {
1912 opt |= CD1400_COR1_STOP2;
1915 switch (cflag & CSIZE) {
1918 opt |= CD1400_COR1_CS5;
1922 opt |= CD1400_COR1_CS6;
1926 opt |= CD1400_COR1_CS7;
1930 opt |= CD1400_COR1_CS8;
1934 if (opt != com->cor[0]) {
1935 cor_change |= CD1400_CCR_COR1;
1936 cd_setreg(com, CD1400_COR1, com->cor[0] = opt);
1940 * Set receive time-out period, normally to max(one char time, 5 ms).
1942 if (t->c_ispeed == 0)
1943 itimeout = cd_getreg(com, CD1400_RTPR);
1945 itimeout = (1000 * bits + t->c_ispeed - 1) / t->c_ispeed;
1951 if (itimeout < MIN_RTP)
1954 if (!(t->c_lflag & ICANON) && t->c_cc[VMIN] != 0 && t->c_cc[VTIME] != 0
1955 && t->c_cc[VTIME] * 10 > itimeout)
1956 itimeout = t->c_cc[VTIME] * 10;
1959 cd_setreg(com, CD1400_RTPR, itimeout);
1962 * set channel option register 2 -
1968 opt |= CD1400_COR2_IXANY;
1970 opt |= CD1400_COR2_IXOFF;
1972 #ifndef SOFT_CTS_OFLOW
1973 if (cflag & CCTS_OFLOW)
1974 opt |= CD1400_COR2_CCTS_OFLOW;
1977 if (opt != com->cor[1]) {
1978 cor_change |= CD1400_CCR_COR2;
1979 cd_setreg(com, CD1400_COR2, com->cor[1] = opt);
1984 * set channel option register 3 -
1985 * receiver FIFO interrupt threshold
1988 opt = RxFifoThreshold;
1990 if (t->c_lflag & ICANON)
1991 opt |= CD1400_COR3_SCD34; /* detect INTR & SUSP chars */
1993 /* detect and transparently handle START and STOP chars */
1994 opt |= CD1400_COR3_FCT | CD1400_COR3_SCD12;
1996 if (opt != com->cor[2]) {
1997 cor_change |= CD1400_CCR_COR3;
1998 cd_setreg(com, CD1400_COR3, com->cor[2] = opt);
2001 /* notify the CD1400 if COR1-3 have changed */
2003 cd1400_channel_cmd(com, CD1400_CCR_CMDCORCHG | cor_change);
2006 * set channel option register 4 -
2009 * received exception processing
2013 opt |= CD1400_COR4_IGNCR;
2016 * we need a new ttyinput() for this, as we don't want to
2017 * have ICRNL && INLCR being done in both layers, or to have
2018 * synchronisation problems
2021 opt |= CD1400_COR4_ICRNL;
2023 opt |= CD1400_COR4_INLCR;
2026 opt |= CD1400_COR4_IGNBRK | CD1400_COR4_NOBRKINT;
2028 * The `-ignbrk -brkint parmrk' case is not handled by the hardware,
2029 * so only tell the hardware about -brkint if -parmrk.
2031 if (!(iflag & (BRKINT | PARMRK)))
2032 opt |= CD1400_COR4_NOBRKINT;
2034 /* XXX using this "intelligence" breaks reporting of overruns. */
2036 opt |= CD1400_COR4_PFO_DISCARD;
2039 opt |= CD1400_COR4_PFO_ESC;
2041 opt |= CD1400_COR4_PFO_NUL;
2044 opt |= CD1400_COR4_PFO_EXCEPTION;
2046 cd_setreg(com, CD1400_COR4, opt);
2049 * set channel option register 5 -
2053 opt |= CD1400_COR5_ISTRIP;
2054 if (t->c_iflag & IEXTEN)
2055 /* enable LNEXT (e.g. ctrl-v quoting) handling */
2056 opt |= CD1400_COR5_LNEXT;
2058 if (t->c_oflag & ONLCR)
2059 opt |= CD1400_COR5_ONLCR;
2060 if (t->c_oflag & OCRNL)
2061 opt |= CD1400_COR5_OCRNL;
2063 cd_setreg(com, CD1400_COR5, opt);
2066 * We always generate modem status change interrupts for CD changes.
2067 * Among other things, this is necessary to track TS_CARR_ON for
2068 * pstat to print even when the driver doesn't care. CD changes
2069 * should be rare so interrupts for them are not worth extra code to
2070 * avoid. We avoid interrupts for other modem status changes (except
2071 * for CTS changes when SOFT_CTS_OFLOW is configured) since this is
2072 * simplest and best.
2076 * set modem change option register 1
2077 * generate modem interrupts on which 1 -> 0 input transitions
2078 * also controls auto-DTR output flow-control, which we don't use
2080 opt = CD1400_MCOR1_CDzd;
2081 #ifdef SOFT_CTS_OFLOW
2082 if (cflag & CCTS_OFLOW)
2083 opt |= CD1400_MCOR1_CTSzd;
2085 cd_setreg(com, CD1400_MCOR1, opt);
2088 * set modem change option register 2
2089 * generate modem interrupts on specific 0 -> 1 input transitions
2091 opt = CD1400_MCOR2_CDod;
2092 #ifdef SOFT_CTS_OFLOW
2093 if (cflag & CCTS_OFLOW)
2094 opt |= CD1400_MCOR2_CTSod;
2096 cd_setreg(com, CD1400_MCOR2, opt);
2099 * XXX should have done this long ago, but there is too much state
2100 * to change all atomically.
2104 com->state &= ~CS_TTGO;
2105 if (!(tp->t_state & TS_TTSTOP))
2106 com->state |= CS_TTGO;
2107 if (cflag & CRTS_IFLOW) {
2108 com->state |= CS_RTS_IFLOW;
2110 * If CS_RTS_IFLOW just changed from off to on, the change
2111 * needs to be propagated to MCR_RTS. This isn't urgent,
2112 * so do it later by calling comstart() instead of repeating
2113 * a lot of code from comstart() here.
2115 } else if (com->state & CS_RTS_IFLOW) {
2116 com->state &= ~CS_RTS_IFLOW;
2118 * CS_RTS_IFLOW just changed from on to off. Force MCR_RTS
2119 * on here, since comstart() won't do it later.
2122 outb(com->modem_ctl_port, com->mcr_image |= MCR_RTS);
2124 cd_setreg(com, com->mcr_rts_reg,
2125 com->mcr_image |= com->mcr_rts);
2130 * Set up state to handle output flow control.
2131 * XXX - worth handling MDMBUF (DCD) flow control at the lowest level?
2132 * Now has 10+ msec latency, while CTS flow has 50- usec latency.
2134 com->state |= CS_ODEVREADY;
2135 #ifdef SOFT_CTS_OFLOW
2136 com->state &= ~CS_CTS_OFLOW;
2137 if (cflag & CCTS_OFLOW) {
2138 com->state |= CS_CTS_OFLOW;
2139 if (!(com->last_modem_status & MSR_CTS))
2140 com->state &= ~CS_ODEVREADY;
2143 /* XXX shouldn't call functions while intrs are disabled. */
2144 disc_optim(tp, t, com);
2147 * Recover from fiddling with CS_TTGO. We used to call siointr1()
2148 * unconditionally, but that defeated the careful discarding of
2149 * stale input in sioopen().
2151 if (com->state >= (CS_BUSY | CS_TTGO))
2154 if (com->state >= (CS_BUSY | CS_TTGO | CS_ODEVREADY)) {
2155 if (!(com->intr_enable & CD1400_SRER_TXRDY))
2156 cd_setreg(com, CD1400_SRER,
2158 = (com->intr_enable & ~CD1400_SRER_TXMPTY)
2159 | CD1400_SRER_TXRDY);
2161 if (com->intr_enable & CD1400_SRER_TXRDY)
2162 cd_setreg(com, CD1400_SRER,
2164 = (com->intr_enable & ~CD1400_SRER_TXRDY)
2165 | CD1400_SRER_TXMPTY);
2171 if (com->ibufold != NULL) {
2172 free(com->ibufold, M_DEVBUF);
2173 com->ibufold = NULL;
2179 siosetwater(com, speed)
2189 * Make the buffer size large enough to handle a softtty interrupt
2190 * latency of about 2 ticks without loss of throughput or data
2191 * (about 3 ticks if input flow control is not used or not honoured,
2192 * but a bit less for CS5-CS7 modes).
2194 cp4ticks = speed / 10 / hz * 4;
2195 for (ibufsize = 128; ibufsize < cp4ticks;)
2197 if (ibufsize == com->ibufsize) {
2203 * Allocate input buffer. The extra factor of 2 in the size is
2204 * to allow for an error byte for each input byte.
2206 ibuf = malloc(2 * ibufsize, M_DEVBUF, M_WAITOK);
2208 /* Initialize non-critical variables. */
2209 com->ibufold = com->ibuf;
2210 com->ibufsize = ibufsize;
2213 tp->t_ififosize = 2 * ibufsize;
2214 tp->t_ispeedwat = (speed_t)-1;
2215 tp->t_ospeedwat = (speed_t)-1;
2219 * Read current input buffer, if any. Continue with interrupts
2223 if (com->iptr != com->ibuf)
2227 * Initialize critical variables, including input buffer watermarks.
2228 * The external device is asked to stop sending when the buffer
2229 * exactly reaches high water, or when the high level requests it.
2230 * The high level is notified immediately (rather than at a later
2231 * clock tick) when this watermark is reached.
2232 * The buffer size is chosen so the watermark should almost never
2234 * The low watermark is invisibly 0 since the buffer is always
2235 * emptied all at once.
2237 com->iptr = com->ibuf = ibuf;
2238 com->ibufend = ibuf + ibufsize;
2239 com->ierroff = ibufsize;
2240 com->ihighwater = ibuf + 3 * ibufsize / 4;
2254 unit = DEV_TO_UNIT(tp->t_dev);
2255 com = com_addr(unit);
2264 if (tp->t_state & TS_TTSTOP) {
2265 com->state &= ~CS_TTGO;
2266 if (com->intr_enable & CD1400_SRER_TXRDY)
2267 cd_setreg(com, CD1400_SRER,
2269 = (com->intr_enable & ~CD1400_SRER_TXRDY)
2270 | CD1400_SRER_TXMPTY);
2272 com->state |= CS_TTGO;
2273 if (com->state >= (CS_BUSY | CS_TTGO | CS_ODEVREADY)
2274 && !(com->intr_enable & CD1400_SRER_TXRDY))
2275 cd_setreg(com, CD1400_SRER,
2277 = (com->intr_enable & ~CD1400_SRER_TXMPTY)
2278 | CD1400_SRER_TXRDY);
2280 if (tp->t_state & TS_TBLOCK) {
2281 if (com->mcr_image & com->mcr_rts && com->state & CS_RTS_IFLOW)
2283 outb(com->modem_ctl_port, com->mcr_image &= ~MCR_RTS);
2285 cd_setreg(com, com->mcr_rts_reg,
2286 com->mcr_image &= ~com->mcr_rts);
2289 if (!(com->mcr_image & com->mcr_rts)
2290 && com->iptr < com->ihighwater
2291 && com->state & CS_RTS_IFLOW)
2293 outb(com->modem_ctl_port, com->mcr_image |= MCR_RTS);
2295 cd_setreg(com, com->mcr_rts_reg,
2296 com->mcr_image |= com->mcr_rts);
2300 if (tp->t_state & (TS_TIMEOUT | TS_TTSTOP)) {
2305 if (tp->t_outq.c_cc != 0) {
2309 if (!com->obufs[0].l_queued) {
2313 com->obufs[0].l_tail
2314 = com->obuf1 + q_to_b(&tp->t_outq, com->obuf1,
2316 com->obufs[0].l_next = NULL;
2317 com->obufs[0].l_queued = TRUE;
2319 if (com->state & CS_BUSY) {
2320 qp = com->obufq.l_next;
2321 while ((next = qp->l_next) != NULL)
2323 qp->l_next = &com->obufs[0];
2325 com->obufq.l_head = com->obufs[0].l_head;
2326 com->obufq.l_tail = com->obufs[0].l_tail;
2327 com->obufq.l_next = &com->obufs[0];
2328 com->state |= CS_BUSY;
2329 if (com->state >= (CS_BUSY | CS_TTGO
2331 cd_setreg(com, CD1400_SRER,
2334 & ~CD1400_SRER_TXMPTY)
2335 | CD1400_SRER_TXRDY);
2339 if (tp->t_outq.c_cc != 0 && !com->obufs[1].l_queued) {
2343 com->obufs[1].l_tail
2344 = com->obuf2 + q_to_b(&tp->t_outq, com->obuf2,
2346 com->obufs[1].l_next = NULL;
2347 com->obufs[1].l_queued = TRUE;
2349 if (com->state & CS_BUSY) {
2350 qp = com->obufq.l_next;
2351 while ((next = qp->l_next) != NULL)
2353 qp->l_next = &com->obufs[1];
2355 com->obufq.l_head = com->obufs[1].l_head;
2356 com->obufq.l_tail = com->obufs[1].l_tail;
2357 com->obufq.l_next = &com->obufs[1];
2358 com->state |= CS_BUSY;
2359 if (com->state >= (CS_BUSY | CS_TTGO
2361 cd_setreg(com, CD1400_SRER,
2364 & ~CD1400_SRER_TXMPTY)
2365 | CD1400_SRER_TXRDY);
2369 tp->t_state |= TS_BUSY;
2377 if (com->state >= (CS_BUSY | CS_TTGO))
2378 siointr1(com); /* fake interrupt to start output */
2393 com = com_addr(DEV_TO_UNIT(tp->t_dev));
2397 com->obufs[0].l_queued = FALSE;
2398 com->obufs[1].l_queued = FALSE;
2399 if (com->extra_state & CSE_ODONE) {
2400 com_events -= LOTS_OF_EVENTS;
2401 com->extra_state &= ~CSE_ODONE;
2402 if (com->etc != ETC_NONE) {
2403 if (com->etc == ETC_BREAK_ENDED)
2404 com->etc = ETC_NONE;
2408 com->tp->t_state &= ~TS_BUSY;
2409 if (com->state & CS_ODONE)
2410 com_events -= LOTS_OF_EVENTS;
2411 com->state &= ~(CS_ODONE | CS_BUSY);
2414 /* XXX no way to reset only input fifo. */
2415 com_events -= (com->iptr - com->ibuf);
2416 com->iptr = com->ibuf;
2421 if (rw & FWRITE && com->etc == ETC_NONE)
2422 cd1400_channel_cmd(com, CD1400_CCR_CMDRESET | CD1400_CCR_FTF);
2427 commctl(com, bits, how)
2436 if (com->channel_control & CD1400_CCR_RCVEN)
2438 mcr = com->mcr_image;
2439 if (mcr & com->mcr_dtr)
2441 if (mcr & com->mcr_rts)
2442 /* XXX wired on for Cyclom-8Ys */
2446 * We must read the modem status from the hardware because
2447 * we don't generate modem status change interrupts for all
2448 * changes, so com->prev_modem_status is not guaranteed to
2449 * be up to date. This is safe, unlike for sio, because
2450 * reading the status register doesn't clear pending modem
2451 * status change interrupts.
2453 msr = cd_getreg(com, CD1400_MSVR2);
2462 /* XXX not connected except for Cyclom-16Y? */
2467 if (bits & TIOCM_DTR)
2468 mcr |= com->mcr_dtr;
2469 if (bits & TIOCM_RTS)
2470 mcr |= com->mcr_rts;
2474 com->mcr_image = mcr;
2475 cd_setreg(com, CD1400_MSVR1, mcr);
2476 cd_setreg(com, CD1400_MSVR2, mcr);
2479 com->mcr_image = mcr = com->mcr_image | mcr;
2480 cd_setreg(com, CD1400_MSVR1, mcr);
2481 cd_setreg(com, CD1400_MSVR2, mcr);
2484 com->mcr_image = mcr = com->mcr_image & ~mcr;
2485 cd_setreg(com, CD1400_MSVR1, mcr);
2486 cd_setreg(com, CD1400_MSVR2, mcr);
2501 * Set our timeout period to 1 second if no polled devices are open.
2502 * Otherwise set it to max(1/200, 1/hz).
2503 * Enable timeouts iff some device is open.
2505 callout_stop(&sio_timeout_handle);
2508 for (unit = 0; unit < NSIO; ++unit) {
2509 com = com_addr(unit);
2510 if (com != NULL && com->tp != NULL
2511 && com->tp->t_state & TS_ISOPEN) {
2514 if (com->poll || com->poll_output) {
2515 sio_timeout = hz > 200 ? hz / 200 : 1;
2522 sio_timeouts_until_log = hz / sio_timeout;
2523 callout_reset(&sio_timeout_handle, sio_timeout,
2526 /* Flush error messages, if any. */
2527 sio_timeouts_until_log = 1;
2528 comwakeup((void *)NULL);
2529 callout_stop(&sio_timeout_handle);
2540 callout_reset(&sio_timeout_handle, sio_timeout, comwakeup, NULL);
2544 * Recover from lost output interrupts.
2545 * Poll any lines that don't use interrupts.
2547 for (unit = 0; unit < NSIO; ++unit) {
2548 com = com_addr(unit);
2550 && (com->state >= (CS_BUSY | CS_TTGO) || com->poll)) {
2559 * Check for and log errors, but not too often.
2561 if (--sio_timeouts_until_log > 0)
2563 sio_timeouts_until_log = hz / sio_timeout;
2564 for (unit = 0; unit < NSIO; ++unit) {
2567 com = com_addr(unit);
2570 for (errnum = 0; errnum < CE_NTYPES; ++errnum) {
2575 delta = com->delta_error_counts[errnum];
2576 com->delta_error_counts[errnum] = 0;
2580 total = com->error_counts[errnum] += delta;
2581 log(LOG_ERR, "cy%d: %u more %s%s (total %lu)\n",
2582 unit, delta, error_desc[errnum],
2583 delta == 1 ? "" : "s", total);
2589 disc_optim(tp, t, com)
2594 #ifndef SOFT_HOTCHAR
2599 * XXX can skip a lot more cases if Smarts. Maybe
2600 * (IGNCR | ISTRIP | IXON) in c_iflag. But perhaps we
2601 * shouldn't skip if (TS_CNTTB | TS_LNCH) is set in t_state.
2603 if (!(t->c_iflag & (ICRNL | IGNCR | IMAXBEL | INLCR | ISTRIP | IXON))
2604 && (!(t->c_iflag & BRKINT) || (t->c_iflag & IGNBRK))
2605 && (!(t->c_iflag & PARMRK)
2606 || (t->c_iflag & (IGNPAR | IGNBRK)) == (IGNPAR | IGNBRK))
2607 && !(t->c_lflag & (ECHO | ICANON | IEXTEN | ISIG | PENDIN))
2608 && linesw[tp->t_line].l_rint == ttyinput)
2609 tp->t_state |= TS_CAN_BYPASS_L_RINT;
2611 tp->t_state &= ~TS_CAN_BYPASS_L_RINT;
2612 com->hotchar = linesw[tp->t_line].l_hotchar;
2613 #ifndef SOFT_HOTCHAR
2614 opt = com->cor[2] & ~CD1400_COR3_SCD34;
2615 if (com->hotchar != 0) {
2616 cd_setreg(com, CD1400_SCHR3, com->hotchar);
2617 cd_setreg(com, CD1400_SCHR4, com->hotchar);
2618 opt |= CD1400_COR3_SCD34;
2620 if (opt != com->cor[2]) {
2621 cd_setreg(com, CD1400_COR3, com->cor[2] = opt);
2622 cd1400_channel_cmd(com, CD1400_CCR_CMDCORCHG | CD1400_CCR_COR3);
2628 /* standard line discipline input routine */
2634 /* XXX duplicate ttyinput(), but without the IXOFF/IXON/ISTRIP/IPARMRK
2635 * bits, as they are done by the CD1400. Hardly worth the effort,
2636 * given that high-throughput sessions are raw anyhow.
2642 comspeed(speed, cy_clock, prescaler_io)
2655 if (speed < 0 || speed > 150000)
2658 /* determine which prescaler to use */
2659 for (prescaler_unit = 4, prescaler = 2048; prescaler_unit;
2660 prescaler_unit--, prescaler >>= 2) {
2661 if (cy_clock / prescaler / speed > 63)
2665 divider = (cy_clock / prescaler * 2 / speed + 1) / 2; /* round off */
2668 actual = cy_clock/prescaler/divider;
2670 /* 10 times error in percent: */
2671 error = ((actual - (long)speed) * 2000 / (long)speed + 1) / 2;
2673 /* 3.0% max error tolerance */
2674 if (error < -30 || error > 30)
2678 printf("prescaler = %d (%d)\n", prescaler, prescaler_unit);
2679 printf("divider = %d (%x)\n", divider, divider);
2680 printf("actual = %d\n", actual);
2681 printf("error = %d\n", error);
2684 *prescaler_io = prescaler_unit;
2689 cd1400_channel_cmd(com, cmd)
2693 cd1400_channel_cmd_wait(com);
2694 cd_setreg(com, CD1400_CCR, cmd);
2695 cd1400_channel_cmd_wait(com);
2699 cd1400_channel_cmd_wait(com)
2702 struct timeval start;
2706 if (cd_getreg(com, CD1400_CCR) == 0)
2710 if (cd_getreg(com, CD1400_CCR) == 0)
2713 usec = 1000000 * (tv.tv_sec - start.tv_sec) +
2714 tv.tv_usec - start.tv_usec;
2717 "cy%d: channel command timeout (%ld usec)\n",
2730 * We can't change the hardware's ETC state while there are any
2731 * characters in the tx fifo, since those characters would be
2732 * interpreted as commands! Unputting characters from the fifo
2733 * is difficult, so we wait up to 12 character times for the fifo
2734 * to drain. The command will be delayed for up to 2 character
2735 * times for the tx to become empty. Unputting characters from
2736 * the tx holding and shift registers is impossible, so we wait
2737 * for the tx to become empty so that the command is sure to be
2738 * executed soon after we issue it.
2741 if (com->etc == etc) {
2745 if ((etc == CD1400_ETC_SENDBREAK
2746 && (com->etc == ETC_BREAK_STARTING
2747 || com->etc == ETC_BREAK_STARTED))
2748 || (etc == CD1400_ETC_STOPBREAK
2749 && (com->etc == ETC_BREAK_ENDING || com->etc == ETC_BREAK_ENDED
2750 || com->etc == ETC_NONE))) {
2755 cd_setreg(com, CD1400_SRER,
2757 = (com->intr_enable & ~CD1400_SRER_TXRDY) | CD1400_SRER_TXMPTY);
2760 while (com->etc == etc
2761 && tsleep(&com->etc, PCATCH, "cyetc", 0) == 0)
2770 struct com_s *basecom;
2777 basecom = com_addr(com->unit & ~(CD1400_NO_OF_CHANNELS - 1));
2778 car = com->unit & CD1400_CAR_CHAN;
2779 cy_align = com->cy_align;
2780 iobase = com->iobase;
2784 if (basecom->car != car)
2785 cd_outb(iobase, CD1400_CAR, cy_align, basecom->car = car);
2786 val = cd_inb(iobase, reg, cy_align);
2793 cd_setreg(com, reg, val)
2798 struct com_s *basecom;
2804 basecom = com_addr(com->unit & ~(CD1400_NO_OF_CHANNELS - 1));
2805 car = com->unit & CD1400_CAR_CHAN;
2806 cy_align = com->cy_align;
2807 iobase = com->iobase;
2811 if (basecom->car != car)
2812 cd_outb(iobase, CD1400_CAR, cy_align, basecom->car = car);
2813 cd_outb(iobase, reg, cy_align, val);
2829 com = com_addr(unit);
2830 printf("info for channel %d\n", unit);
2831 printf("------------------\n");
2832 printf("total cyclom service probes:\t%d\n", cy_svrr_probes);
2833 printf("calls to upper layer:\t\t%d\n", cy_timeouts);
2836 iobase = com->iobase;
2838 printf("cd1400 base address:\\tt%p\n", iobase);
2839 printf("saved channel_control:\t\t0x%02x\n", com->channel_control);
2840 printf("saved cor1-3:\t\t\t0x%02x 0x%02x 0x%02x\n",
2841 com->cor[0], com->cor[1], com->cor[2]);
2842 printf("service request enable reg:\t0x%02x (0x%02x cached)\n",
2843 cd_getreg(com, CD1400_SRER), com->intr_enable);
2844 printf("service request register:\t0x%02x\n",
2845 cd_inb(iobase, CD1400_SVRR, com->cy_align));
2846 printf("modem status:\t\t\t0x%02x (0x%02x cached)\n",
2847 cd_getreg(com, CD1400_MSVR2), com->prev_modem_status);
2848 printf("rx/tx/mdm interrupt registers:\t0x%02x 0x%02x 0x%02x\n",
2849 cd_inb(iobase, CD1400_RIR, com->cy_align),
2850 cd_inb(iobase, CD1400_TIR, com->cy_align),
2851 cd_inb(iobase, CD1400_MIR, com->cy_align));
2853 printf("com state:\t\t\t0x%02x\n", com->state);
2854 printf("calls to comstart():\t\t%d (%d useful)\n",
2855 com->start_count, com->start_real);
2856 printf("rx buffer chars free:\t\t%d\n", com->iptr - com->ibuf);
2858 if (com->obufs[0].l_queued)
2859 ocount += com->obufs[0].l_tail - com->obufs[0].l_head;
2860 if (com->obufs[1].l_queued)
2861 ocount += com->obufs[1].l_tail - com->obufs[1].l_head;
2862 printf("tx buffer chars:\t\t%u\n", ocount);
2863 printf("received chars:\t\t\t%d\n", com->bytes_in);
2864 printf("received exceptions:\t\t%d\n", com->recv_exception);
2865 printf("modem signal deltas:\t\t%d\n", com->mdm);
2866 printf("transmitted chars:\t\t%d\n", com->bytes_out);
2870 printf("tty state:\t\t\t0x%08x\n", tp->t_state);
2872 "upper layer queue lengths:\t%d raw, %d canon, %d output\n",
2873 tp->t_rawq.c_cc, tp->t_canq.c_cc, tp->t_outq.c_cc);
2875 printf("tty state:\t\t\tclosed\n");
2877 #endif /* CyDebug */