cy.c revision 67584
1/*- 2 * cyclades cyclom-y serial driver 3 * Andrew Herbert <andrew@werple.apana.org.au>, 17 August 1993 4 * 5 * Copyright (c) 1993 Andrew Herbert. 6 * All rights reserved. 7 * 8 * Redistribution and use in source and binary forms, with or without 9 * modification, are permitted provided that the following conditions 10 * are met: 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. 18 * 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. 29 * 30 * $FreeBSD: head/sys/dev/cy/cy.c 67584 2000-10-25 21:13:42Z jhb $ 31 */ 32 33#include "opt_compat.h" 34#include "cy.h" 35 36/* 37 * TODO: 38 * Atomic COR change. 39 * Consoles. 40 */ 41 42/* 43 * Temporary compile-time configuration options. 44 */ 45#define RxFifoThreshold (CD1400_RX_FIFO_SIZE / 2) 46 /* Number of chars in the receiver FIFO before an 47 * an interrupt is generated. Should depend on 48 * line speed. Needs to be about 6 on a 486DX33 49 * for 4 active ports at 115200 bps. Why doesn't 50 * 10 work? 51 */ 52#define PollMode /* Use polling-based irq service routine, not the 53 * hardware svcack lines. Must be defined for 54 * Cyclom-16Y boards. Less efficient for Cyclom-8Ys, 55 * and stops 4 * 115200 bps from working. 56 */ 57#undef Smarts /* Enable slightly more CD1400 intelligence. Mainly 58 * the output CR/LF processing, plus we can avoid a 59 * few checks usually done in ttyinput(). 60 * 61 * XXX not fully implemented, and not particularly 62 * worthwhile. 63 */ 64#undef CyDebug /* Include debugging code (not very expensive). */ 65 66/* These will go away. */ 67#undef SOFT_CTS_OFLOW 68#define SOFT_HOTCHAR 69 70#include <sys/param.h> 71#include <sys/systm.h> 72#include <sys/tty.h> 73#include <sys/proc.h> 74#include <sys/conf.h> 75#include <sys/dkstat.h> 76#include <sys/fcntl.h> 77#include <sys/bus.h> 78#include <sys/interrupt.h> 79#include <sys/ipl.h> 80#include <sys/kernel.h> 81#include <sys/malloc.h> 82#include <sys/syslog.h> 83#include <machine/lock.h> 84#include <machine/psl.h> 85 86#include <i386/isa/isa_device.h> 87#include <i386/isa/cyreg.h> 88#include <i386/isa/ic/cd1400.h> 89 90#ifndef COMPAT_OLDISA 91#error "The cy device requires the old isa compatibility shims" 92#endif 93 94/* 95 * Dictionary so that I can name everything *sio* or *com* to compare with 96 * sio.c. There is also lots of ugly formatting and unnecessary ifdefs to 97 * simplify the comparision. These will go away. 98 */ 99#define LSR_BI CD1400_RDSR_BREAK 100#define LSR_FE CD1400_RDSR_FE 101#define LSR_OE CD1400_RDSR_OE 102#define LSR_PE CD1400_RDSR_PE 103#define MCR_DTR CD1400_MSVR2_DTR 104#define MCR_RTS CD1400_MSVR1_RTS 105#define MSR_CTS CD1400_MSVR2_CTS 106#define MSR_DCD CD1400_MSVR2_CD 107#define MSR_DSR CD1400_MSVR2_DSR 108#define MSR_RI CD1400_MSVR2_RI 109#define NSIO (NCY * CY_MAX_PORTS) 110#define comconsole cyconsole 111#define comdefaultrate cydefaultrate 112#define com_events cy_events 113#define comhardclose cyhardclose 114#define commctl cymctl 115#define comparam cyparam 116#define comspeed cyspeed 117#define comstart cystart 118#define comwakeup cywakeup 119#define nsio_tty ncy_tty 120#define p_com_addr p_cy_addr 121#define sioattach cyattach 122#define sioclose cyclose 123#define siodriver cydriver 124#define siodtrwakeup cydtrwakeup 125#define sioinput cyinput 126#define siointr cyintr 127#define siointr1 cyintr1 128#define sioioctl cyioctl 129#define sioopen cyopen 130#define siopoll cypoll 131#define sioprobe cyprobe 132#define siosettimeout cysettimeout 133#define siosetwater cysetwater 134#define comstop cystop 135#define siowrite cywrite 136#define sio_irec cy_irec 137#define sio_timeout cy_timeout 138#define sio_timeout_handle cy_timeout_handle 139#define sio_timeouts_until_log cy_timeouts_until_log 140#define sio_tty cy_tty 141 142#define CY_MAX_PORTS (CD1400_NO_OF_CHANNELS * CY_MAX_CD1400s) 143 144/* We encode the cyclom unit number (cyu) in spare bits in the IVR's. */ 145#define CD1400_xIVR_CHAN_SHIFT 3 146#define CD1400_xIVR_CHAN 0x1F 147 148/* 149 * ETC states. com->etc may also contain a hardware ETC command value, 150 * meaning that execution of that command is pending. 151 */ 152#define ETC_NONE 0 /* we depend on bzero() setting this */ 153#define ETC_BREAK_STARTING 1 154#define ETC_BREAK_STARTED 2 155#define ETC_BREAK_ENDING 3 156#define ETC_BREAK_ENDED 4 157 158#define LOTS_OF_EVENTS 64 /* helps separate urgent events from input */ 159 160#define CALLOUT_MASK 0x80 161#define CONTROL_MASK 0x60 162#define CONTROL_INIT_STATE 0x20 163#define CONTROL_LOCK_STATE 0x40 164#define DEV_TO_UNIT(dev) (MINOR_TO_UNIT(minor(dev))) 165#define MINOR_MAGIC_MASK (CALLOUT_MASK | CONTROL_MASK) 166#define MINOR_TO_UNIT(mynor) (((mynor) >> 16) * CY_MAX_PORTS \ 167 | (((mynor) & 0xff) & ~MINOR_MAGIC_MASK)) 168 169/* 170 * com state bits. 171 * (CS_BUSY | CS_TTGO) and (CS_BUSY | CS_TTGO | CS_ODEVREADY) must be higher 172 * than the other bits so that they can be tested as a group without masking 173 * off the low bits. 174 * 175 * The following com and tty flags correspond closely: 176 * CS_BUSY = TS_BUSY (maintained by comstart(), siopoll() and 177 * comstop()) 178 * CS_TTGO = ~TS_TTSTOP (maintained by comparam() and comstart()) 179 * CS_CTS_OFLOW = CCTS_OFLOW (maintained by comparam()) 180 * CS_RTS_IFLOW = CRTS_IFLOW (maintained by comparam()) 181 * TS_FLUSH is not used. 182 * XXX I think TIOCSETA doesn't clear TS_TTSTOP when it clears IXON. 183 * XXX CS_*FLOW should be CF_*FLOW in com->flags (control flags not state). 184 */ 185#define CS_BUSY 0x80 /* output in progress */ 186#define CS_TTGO 0x40 /* output not stopped by XOFF */ 187#define CS_ODEVREADY 0x20 /* external device h/w ready (CTS) */ 188#define CS_CHECKMSR 1 /* check of MSR scheduled */ 189#define CS_CTS_OFLOW 2 /* use CTS output flow control */ 190#define CS_DTR_OFF 0x10 /* DTR held off */ 191#define CS_ODONE 4 /* output completed */ 192#define CS_RTS_IFLOW 8 /* use RTS input flow control */ 193#define CSE_ODONE 1 /* output transmitted */ 194 195static char const * const error_desc[] = { 196#define CE_OVERRUN 0 197 "silo overflow", 198#define CE_INTERRUPT_BUF_OVERFLOW 1 199 "interrupt-level buffer overflow", 200#define CE_TTY_BUF_OVERFLOW 2 201 "tty-level buffer overflow", 202}; 203 204#define CE_NTYPES 3 205#define CE_RECORD(com, errnum) (++(com)->delta_error_counts[errnum]) 206 207/* types. XXX - should be elsewhere */ 208typedef u_char bool_t; /* boolean */ 209typedef u_char volatile *cy_addr; 210 211/* queue of linear buffers */ 212struct lbq { 213 u_char *l_head; /* next char to process */ 214 u_char *l_tail; /* one past the last char to process */ 215 struct lbq *l_next; /* next in queue */ 216 bool_t l_queued; /* nonzero if queued */ 217}; 218 219/* com device structure */ 220struct com_s { 221 u_char state; /* miscellaneous flag bits */ 222 bool_t active_out; /* nonzero if the callout device is open */ 223#if 0 224 u_char cfcr_image; /* copy of value written to CFCR */ 225#endif 226 u_char etc; /* pending Embedded Transmit Command */ 227 u_char extra_state; /* more flag bits, separate for order trick */ 228#if 0 229 u_char fifo_image; /* copy of value written to FIFO */ 230#endif 231 u_char gfrcr_image; /* copy of value read from GFRCR */ 232#if 0 233 bool_t hasfifo; /* nonzero for 16550 UARTs */ 234 bool_t loses_outints; /* nonzero if device loses output interrupts */ 235#endif 236 u_char mcr_dtr; /* MCR bit that is wired to DTR */ 237 u_char mcr_image; /* copy of value written to MCR */ 238 u_char mcr_rts; /* MCR bit that is wired to RTS */ 239#if 0 240#ifdef COM_MULTIPORT 241 bool_t multiport; /* is this unit part of a multiport device? */ 242#endif /* COM_MULTIPORT */ 243 bool_t no_irq; /* nonzero if irq is not attached */ 244 bool_t poll; /* nonzero if polling is required */ 245 bool_t poll_output; /* nonzero if polling for output is required */ 246#endif 247 int unit; /* unit number */ 248 int dtr_wait; /* time to hold DTR down on close (* 1/hz) */ 249#if 0 250 u_int tx_fifo_size; 251#endif 252 u_int wopeners; /* # processes waiting for DCD in open() */ 253 254 /* 255 * The high level of the driver never reads status registers directly 256 * because there would be too many side effects to handle conveniently. 257 * Instead, it reads copies of the registers stored here by the 258 * interrupt handler. 259 */ 260 u_char last_modem_status; /* last MSR read by intr handler */ 261 u_char prev_modem_status; /* last MSR handled by high level */ 262 263 u_char hotchar; /* ldisc-specific char to be handled ASAP */ 264 u_char *ibuf; /* start of input buffer */ 265 u_char *ibufend; /* end of input buffer */ 266 u_char *ibufold; /* old input buffer, to be freed */ 267 u_char *ihighwater; /* threshold in input buffer */ 268 u_char *iptr; /* next free spot in input buffer */ 269 int ibufsize; /* size of ibuf (not include error bytes) */ 270 int ierroff; /* offset of error bytes in ibuf */ 271 272 struct lbq obufq; /* head of queue of output buffers */ 273 struct lbq obufs[2]; /* output buffers */ 274 275 int cy_align; /* index for register alignment */ 276 cy_addr cy_iobase; /* base address of this port's cyclom */ 277 cy_addr iobase; /* base address of this port's cd1400 */ 278 int mcr_rts_reg; /* cd1400 reg number of reg holding mcr_rts */ 279 280 struct tty *tp; /* cross reference */ 281 282 /* Initial state. */ 283 struct termios it_in; /* should be in struct tty */ 284 struct termios it_out; 285 286 /* Lock state. */ 287 struct termios lt_in; /* should be in struct tty */ 288 struct termios lt_out; 289 290 bool_t do_timestamp; 291 bool_t do_dcd_timestamp; 292 struct timeval timestamp; 293 struct timeval dcd_timestamp; 294 295 u_long bytes_in; /* statistics */ 296 u_long bytes_out; 297 u_int delta_error_counts[CE_NTYPES]; 298 u_long error_counts[CE_NTYPES]; 299 300 u_int recv_exception; /* exception chars received */ 301 u_int mdm; /* modem signal changes */ 302#ifdef CyDebug 303 u_int start_count; /* no. of calls to comstart() */ 304 u_int start_real; /* no. of calls that did something */ 305#endif 306 u_char car; /* CD1400 CAR shadow (if first unit in cd) */ 307 u_char channel_control;/* CD1400 CCR control command shadow */ 308 u_char cor[3]; /* CD1400 COR1-3 shadows */ 309 u_char intr_enable; /* CD1400 SRER shadow */ 310 311 /* 312 * Data area for output buffers. Someday we should build the output 313 * buffer queue without copying data. 314 */ 315 u_char obuf1[256]; 316 u_char obuf2[256]; 317}; 318 319/* PCI driver entry point. */ 320int cyattach_common __P((cy_addr cy_iobase, int cy_align)); 321ointhand2_t siointr; 322 323static int cy_units __P((cy_addr cy_iobase, int cy_align)); 324static int sioattach __P((struct isa_device *dev)); 325static void cd1400_channel_cmd __P((struct com_s *com, int cmd)); 326static void cd1400_channel_cmd_wait __P((struct com_s *com)); 327static void cd_etc __P((struct com_s *com, int etc)); 328static int cd_getreg __P((struct com_s *com, int reg)); 329static void cd_setreg __P((struct com_s *com, int reg, int val)); 330static timeout_t siodtrwakeup; 331static void comhardclose __P((struct com_s *com)); 332static void sioinput __P((struct com_s *com)); 333#if 0 334static void siointr1 __P((struct com_s *com)); 335#endif 336static int commctl __P((struct com_s *com, int bits, int how)); 337static int comparam __P((struct tty *tp, struct termios *t)); 338static void siopoll __P((void *arg)); 339static int sioprobe __P((struct isa_device *dev)); 340static void siosettimeout __P((void)); 341static int siosetwater __P((struct com_s *com, speed_t speed)); 342static int comspeed __P((speed_t speed, u_long cy_clock, 343 int *prescaler_io)); 344static void comstart __P((struct tty *tp)); 345static void comstop __P((struct tty *tp, int rw)); 346static timeout_t comwakeup; 347static void disc_optim __P((struct tty *tp, struct termios *t, 348 struct com_s *com)); 349 350#ifdef CyDebug 351void cystatus __P((int unit)); 352#endif 353 354static char driver_name[] = "cy"; 355 356/* table and macro for fast conversion from a unit number to its com struct */ 357static struct com_s *p_com_addr[NSIO]; 358#define com_addr(unit) (p_com_addr[unit]) 359 360struct isa_driver siodriver = { 361 INTR_TYPE_TTY | INTR_FAST, 362 sioprobe, 363 sioattach, 364 driver_name 365}; 366COMPAT_ISA_DRIVER(cy, cydriver); /* XXX */ 367 368static d_open_t sioopen; 369static d_close_t sioclose; 370static d_write_t siowrite; 371static d_ioctl_t sioioctl; 372 373#define CDEV_MAJOR 48 374static struct cdevsw sio_cdevsw = { 375 /* open */ sioopen, 376 /* close */ sioclose, 377 /* read */ ttyread, 378 /* write */ siowrite, 379 /* ioctl */ sioioctl, 380 /* poll */ ttypoll, 381 /* mmap */ nommap, 382 /* strategy */ nostrategy, 383 /* name */ driver_name, 384 /* maj */ CDEV_MAJOR, 385 /* dump */ nodump, 386 /* psize */ nopsize, 387 /* flags */ D_TTY, 388 /* bmaj */ -1 389}; 390 391static int comconsole = -1; 392static speed_t comdefaultrate = TTYDEF_SPEED; 393static u_int com_events; /* input chars + weighted output completions */ 394static struct intrhand *sio_ih; 395static int sio_timeout; 396static int sio_timeouts_until_log; 397static struct callout_handle sio_timeout_handle 398 = CALLOUT_HANDLE_INITIALIZER(&sio_timeout_handle); 399#if 0 /* XXX */ 400static struct tty *sio_tty[NSIO]; 401#else 402static struct tty sio_tty[NSIO]; 403#endif 404static const int nsio_tty = NSIO; 405 406#ifdef CyDebug 407static u_int cd_inbs; 408static u_int cy_inbs; 409static u_int cd_outbs; 410static u_int cy_outbs; 411static u_int cy_svrr_probes; 412static u_int cy_timeouts; 413#endif 414 415static int cy_chip_offset[] = { 416 0x0000, 0x0400, 0x0800, 0x0c00, 0x0200, 0x0600, 0x0a00, 0x0e00, 417}; 418static int cy_nr_cd1400s[NCY]; 419static int cy_total_devices; 420#undef RxFifoThreshold 421static int volatile RxFifoThreshold = (CD1400_RX_FIFO_SIZE / 2); 422 423static int 424sioprobe(dev) 425 struct isa_device *dev; 426{ 427 cy_addr iobase; 428 429 iobase = (cy_addr)dev->id_maddr; 430 431 /* Cyclom-16Y hardware reset (Cyclom-8Ys don't care) */ 432 cy_inb(iobase, CY16_RESET, 0); /* XXX? */ 433 DELAY(500); /* wait for the board to get its act together */ 434 435 /* this is needed to get the board out of reset */ 436 cy_outb(iobase, CY_CLEAR_INTR, 0, 0); 437 DELAY(500); 438 439 return (cy_units(iobase, 0) == 0 ? 0 : -1); 440} 441 442static int 443cy_units(cy_iobase, cy_align) 444 cy_addr cy_iobase; 445 int cy_align; 446{ 447 int cyu; 448 u_char firmware_version; 449 int i; 450 cy_addr iobase; 451 452 for (cyu = 0; cyu < CY_MAX_CD1400s; ++cyu) { 453 iobase = cy_iobase + (cy_chip_offset[cyu] << cy_align); 454 455 /* wait for chip to become ready for new command */ 456 for (i = 0; i < 10; i++) { 457 DELAY(50); 458 if (!cd_inb(iobase, CD1400_CCR, cy_align)) 459 break; 460 } 461 462 /* clear the GFRCR register */ 463 cd_outb(iobase, CD1400_GFRCR, cy_align, 0); 464 465 /* issue a reset command */ 466 cd_outb(iobase, CD1400_CCR, cy_align, 467 CD1400_CCR_CMDRESET | CD1400_CCR_FULLRESET); 468 469 /* wait for the CD1400 to initialize itself */ 470 for (i = 0; i < 200; i++) { 471 DELAY(50); 472 473 /* retrieve firmware version */ 474 firmware_version = cd_inb(iobase, CD1400_GFRCR, 475 cy_align); 476 if ((firmware_version & 0xf0) == 0x40) 477 break; 478 } 479 480 /* 481 * Anything in the 0x40-0x4F range is fine. 482 * If one CD1400 is bad then we don't support higher 483 * numbered good ones on this board. 484 */ 485 if ((firmware_version & 0xf0) != 0x40) 486 break; 487 } 488 return (cyu); 489} 490 491static int 492sioattach(isdp) 493 struct isa_device *isdp; 494{ 495 int adapter; 496 497 adapter = cyattach_common((cy_addr) isdp->id_maddr, 0); 498 if (adapter < 0) 499 return (0); 500 501 /* 502 * XXX 503 * This kludge is to allow ISA/PCI device specifications in the 504 * kernel config file to be in any order. 505 */ 506 if (isdp->id_unit != adapter) { 507 printf("cy%d: attached as cy%d\n", isdp->id_unit, adapter); 508 isdp->id_unit = adapter; /* XXX */ 509 } 510 isdp->id_ointr = siointr; 511 /* isdp->id_ri_flags |= RI_FAST; XXX unimplemented - use newbus! */ 512 return (1); 513} 514 515int 516cyattach_common(cy_iobase, cy_align) 517 cy_addr cy_iobase; 518 int cy_align; 519{ 520 int adapter; 521 int cyu; 522 u_char firmware_version; 523 cy_addr iobase; 524 int ncyu; 525 int unit; 526 527 adapter = cy_total_devices; 528 if ((u_int)adapter >= NCY) { 529 printf( 530 "cy%d: can't attach adapter: insufficient cy devices configured\n", 531 adapter); 532 return (-1); 533 } 534 ncyu = cy_units(cy_iobase, cy_align); 535 if (ncyu == 0) 536 return (-1); 537 cy_nr_cd1400s[adapter] = ncyu; 538 cy_total_devices++; 539 540 unit = adapter * CY_MAX_PORTS; 541 for (cyu = 0; cyu < ncyu; ++cyu) { 542 int cdu; 543 544 iobase = (cy_addr) (cy_iobase 545 + (cy_chip_offset[cyu] << cy_align)); 546 firmware_version = cd_inb(iobase, CD1400_GFRCR, cy_align); 547 548 /* Set up a receive timeout period of than 1+ ms. */ 549 cd_outb(iobase, CD1400_PPR, cy_align, 550 howmany(CY_CLOCK(firmware_version) 551 / CD1400_PPR_PRESCALER, 1000)); 552 553 for (cdu = 0; cdu < CD1400_NO_OF_CHANNELS; ++cdu, ++unit) { 554 struct com_s *com; 555 int s; 556 557 com = malloc(sizeof *com, M_DEVBUF, M_NOWAIT); 558 if (com == NULL) 559 break; 560 bzero(com, sizeof *com); 561 com->unit = unit; 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; 567 } else { 568 com->mcr_dtr = MCR_DTR; 569 com->mcr_rts = MCR_RTS; 570 com->mcr_rts_reg = CD1400_MSVR1; 571 } 572 com->dtr_wait = 3 * hz; 573 com->obufs[0].l_head = com->obuf1; 574 com->obufs[1].l_head = com->obuf2; 575 576 com->cy_align = cy_align; 577 com->cy_iobase = cy_iobase; 578 com->iobase = iobase; 579 com->car = ~CD1400_CAR_CHAN; 580 581 /* 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. 586 */ 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; 597 } 598 if (siosetwater(com, com->it_in.c_ispeed) != 0) { 599 free(com, M_DEVBUF); 600 return (0); 601 } 602 termioschars(&com->it_in); 603 com->it_in.c_ispeed = com->it_in.c_ospeed = comdefaultrate; 604 com->it_out = com->it_in; 605 606 s = spltty(); 607 com_addr(unit) = com; 608 splx(s); 609 610 if (sio_ih == NULL) { 611 cdevsw_add(&sio_cdevsw); 612 sio_ih = sinthand_add("tty:sio", &tty_ithd, siopoll, NULL, 613 SWI_TTY, 0); 614 } 615 make_dev(&sio_cdevsw, unit, 616 UID_ROOT, GID_WHEEL, 0600, "ttyc%r%r", adapter, 617 unit % CY_MAX_PORTS); 618 make_dev(&sio_cdevsw, unit | CONTROL_INIT_STATE, 619 UID_ROOT, GID_WHEEL, 0600, "ttyic%r%r", adapter, 620 unit % CY_MAX_PORTS); 621 make_dev(&sio_cdevsw, unit | CONTROL_LOCK_STATE, 622 UID_ROOT, GID_WHEEL, 0600, "ttylc%r%r", adapter, 623 unit % CY_MAX_PORTS); 624 make_dev(&sio_cdevsw, unit | CALLOUT_MASK, 625 UID_UUCP, GID_DIALER, 0660, "cuac%r%r", adapter, 626 unit % CY_MAX_PORTS); 627 make_dev(&sio_cdevsw, unit | CALLOUT_MASK | CONTROL_INIT_STATE, 628 UID_UUCP, GID_DIALER, 0660, "cuaic%r%r", adapter, 629 unit % CY_MAX_PORTS); 630 make_dev(&sio_cdevsw, unit | CALLOUT_MASK | CONTROL_LOCK_STATE, 631 UID_UUCP, GID_DIALER, 0660, "cualc%r%r", adapter, 632 unit % CY_MAX_PORTS); 633 } 634 } 635 636 /* ensure an edge for the next interrupt */ 637 cy_outb(cy_iobase, CY_CLEAR_INTR, cy_align, 0); 638 639 return (adapter); 640} 641 642static int 643sioopen(dev, flag, mode, p) 644 dev_t dev; 645 int flag; 646 int mode; 647 struct proc *p; 648{ 649 struct com_s *com; 650 int error; 651 int mynor; 652 int s; 653 struct tty *tp; 654 int unit; 655 int intrsave; 656 657 mynor = minor(dev); 658 unit = MINOR_TO_UNIT(mynor); 659 if ((u_int) unit >= NSIO || (com = com_addr(unit)) == NULL) 660 return (ENXIO); 661 if (mynor & CONTROL_MASK) 662 return (0); 663#if 0 /* XXX */ 664 tp = com->tp = sio_tty[unit] = ttymalloc(sio_tty[unit]); 665#else 666 tp = com->tp = &sio_tty[unit]; 667#endif 668 dev->si_tty = tp; 669 s = spltty(); 670 /* 671 * We jump to this label after all non-interrupted sleeps to pick 672 * up any changes of the device state. 673 */ 674open_top: 675 while (com->state & CS_DTR_OFF) { 676 error = tsleep(&com->dtr_wait, TTIPRI | PCATCH, "cydtr", 0); 677 if (error != 0) 678 goto out; 679 } 680 if (tp->t_state & TS_ISOPEN) { 681 /* 682 * The device is open, so everything has been initialized. 683 * Handle conflicts. 684 */ 685 if (mynor & CALLOUT_MASK) { 686 if (!com->active_out) { 687 error = EBUSY; 688 goto out; 689 } 690 } else { 691 if (com->active_out) { 692 if (flag & O_NONBLOCK) { 693 error = EBUSY; 694 goto out; 695 } 696 error = tsleep(&com->active_out, 697 TTIPRI | PCATCH, "cybi", 0); 698 if (error != 0) 699 goto out; 700 goto open_top; 701 } 702 } 703 if (tp->t_state & TS_XCLUDE && 704 suser(p)) { 705 error = EBUSY; 706 goto out; 707 } 708 } else { 709 /* 710 * The device isn't open, so there are no conflicts. 711 * Initialize it. Initialization is done twice in many 712 * cases: to preempt sleeping callin opens if we are 713 * callout, and to complete a callin open after DCD rises. 714 */ 715 tp->t_oproc = comstart; 716 tp->t_stop = comstop; 717 tp->t_param = comparam; 718 tp->t_dev = dev; 719 tp->t_termios = mynor & CALLOUT_MASK 720 ? com->it_out : com->it_in; 721 722 /* Encode per-board unit in LIVR for access in intr routines. */ 723 cd_setreg(com, CD1400_LIVR, 724 (unit & CD1400_xIVR_CHAN) << CD1400_xIVR_CHAN_SHIFT); 725 726 (void)commctl(com, TIOCM_DTR | TIOCM_RTS, DMSET); 727#if 0 728 com->poll = com->no_irq; 729 com->poll_output = com->loses_outints; 730#endif 731 ++com->wopeners; 732 error = comparam(tp, &tp->t_termios); 733 --com->wopeners; 734 if (error != 0) 735 goto out; 736#if 0 737 if (com->hasfifo) { 738 /* 739 * (Re)enable and flush fifos. 740 * 741 * Certain SMC chips cause problems if the fifos 742 * are enabled while input is ready. Turn off the 743 * fifo if necessary to clear the input. We test 744 * the input ready bit after enabling the fifos 745 * since we've already enabled them in comparam() 746 * and to handle races between enabling and fresh 747 * input. 748 */ 749 while (TRUE) { 750 outb(iobase + com_fifo, 751 FIFO_RCV_RST | FIFO_XMT_RST 752 | com->fifo_image); 753 DELAY(100); 754 if (!(inb(com->line_status_port) & LSR_RXRDY)) 755 break; 756 outb(iobase + com_fifo, 0); 757 DELAY(100); 758 (void) inb(com->data_port); 759 } 760 } 761 762 intrsave = save_intr(); 763 disable_intr(); 764 COM_LOCK(); 765 (void) inb(com->line_status_port); 766 (void) inb(com->data_port); 767 com->prev_modem_status = com->last_modem_status 768 = inb(com->modem_status_port); 769 outb(iobase + com_ier, IER_ERXRDY | IER_ETXRDY | IER_ERLS 770 | IER_EMSC); 771 COM_UNLOCK(); 772 restore_intr(intrsave); 773#else /* !0 */ 774 /* 775 * Flush fifos. This requires a full channel reset which 776 * also disables the transmitter and receiver. Recover 777 * from this. 778 */ 779 cd1400_channel_cmd(com, 780 CD1400_CCR_CMDRESET | CD1400_CCR_CHANRESET); 781 cd1400_channel_cmd(com, com->channel_control); 782 783 intrsave = save_intr(); 784 disable_intr(); 785 COM_LOCK(); 786 com->prev_modem_status = com->last_modem_status 787 = cd_getreg(com, CD1400_MSVR2); 788 cd_setreg(com, CD1400_SRER, 789 com->intr_enable 790 = CD1400_SRER_MDMCH | CD1400_SRER_RXDATA); 791 COM_UNLOCK(); 792 restore_intr(intrsave); 793#endif /* 0 */ 794 /* 795 * Handle initial DCD. Callout devices get a fake initial 796 * DCD (trapdoor DCD). If we are callout, then any sleeping 797 * callin opens get woken up and resume sleeping on "cybi" 798 * instead of "cydcd". 799 */ 800 /* 801 * XXX `mynor & CALLOUT_MASK' should be 802 * `tp->t_cflag & (SOFT_CARRIER | TRAPDOOR_CARRIER) where 803 * TRAPDOOR_CARRIER is the default initial state for callout 804 * devices and SOFT_CARRIER is like CLOCAL except it hides 805 * the true carrier. 806 */ 807 if (com->prev_modem_status & MSR_DCD || mynor & CALLOUT_MASK) 808 (*linesw[tp->t_line].l_modem)(tp, 1); 809 } 810 /* 811 * Wait for DCD if necessary. 812 */ 813 if (!(tp->t_state & TS_CARR_ON) && !(mynor & CALLOUT_MASK) 814 && !(tp->t_cflag & CLOCAL) && !(flag & O_NONBLOCK)) { 815 ++com->wopeners; 816 error = tsleep(TSA_CARR_ON(tp), TTIPRI | PCATCH, "cydcd", 0); 817 --com->wopeners; 818 if (error != 0) 819 goto out; 820 goto open_top; 821 } 822 error = (*linesw[tp->t_line].l_open)(dev, tp); 823 disc_optim(tp, &tp->t_termios, com); 824 if (tp->t_state & TS_ISOPEN && mynor & CALLOUT_MASK) 825 com->active_out = TRUE; 826 siosettimeout(); 827out: 828 splx(s); 829 if (!(tp->t_state & TS_ISOPEN) && com->wopeners == 0) 830 comhardclose(com); 831 return (error); 832} 833 834static int 835sioclose(dev, flag, mode, p) 836 dev_t dev; 837 int flag; 838 int mode; 839 struct proc *p; 840{ 841 struct com_s *com; 842 int mynor; 843 int s; 844 struct tty *tp; 845 846 mynor = minor(dev); 847 if (mynor & CONTROL_MASK) 848 return (0); 849 com = com_addr(MINOR_TO_UNIT(mynor)); 850 tp = com->tp; 851 s = spltty(); 852 cd_etc(com, CD1400_ETC_STOPBREAK); 853 (*linesw[tp->t_line].l_close)(tp, flag); 854 disc_optim(tp, &tp->t_termios, com); 855 comstop(tp, FREAD | FWRITE); 856 comhardclose(com); 857 ttyclose(tp); 858 siosettimeout(); 859 splx(s); 860#ifdef broken /* session holds a ref to the tty; can't deallocate */ 861 ttyfree(tp); 862 com->tp = sio_tty[unit] = NULL; 863#endif 864 return (0); 865} 866 867static void 868comhardclose(com) 869 struct com_s *com; 870{ 871 cy_addr iobase; 872 int s; 873 struct tty *tp; 874 int unit; 875 int intrsave; 876 877 unit = com->unit; 878 iobase = com->iobase; 879 s = spltty(); 880#if 0 881 com->poll = FALSE; 882 com->poll_output = FALSE; 883#endif 884 com->do_timestamp = 0; 885#if 0 886 outb(iobase + com_cfcr, com->cfcr_image &= ~CFCR_SBREAK); 887#else 888 /* XXX */ 889 intrsave = save_intr(); 890 disable_intr(); 891 COM_LOCK(); 892 com->etc = ETC_NONE; 893 cd_setreg(com, CD1400_COR2, com->cor[1] &= ~CD1400_COR2_ETC); 894 COM_UNLOCK(); 895 restore_intr(intrsave); 896 cd1400_channel_cmd(com, CD1400_CCR_CMDRESET | CD1400_CCR_FTF); 897#endif 898 899 { 900#if 0 901 outb(iobase + com_ier, 0); 902#else 903 intrsave = save_intr(); 904 disable_intr(); 905 COM_LOCK(); 906 cd_setreg(com, CD1400_SRER, com->intr_enable = 0); 907 COM_UNLOCK(); 908 restore_intr(intrsave); 909#endif 910 tp = com->tp; 911 if ((tp->t_cflag & HUPCL) 912 /* 913 * XXX we will miss any carrier drop between here and the 914 * next open. Perhaps we should watch DCD even when the 915 * port is closed; it is not sufficient to check it at 916 * the next open because it might go up and down while 917 * we're not watching. 918 */ 919 || (!com->active_out 920 && !(com->prev_modem_status & MSR_DCD) 921 && !(com->it_in.c_cflag & CLOCAL)) 922 || !(tp->t_state & TS_ISOPEN)) { 923 (void)commctl(com, TIOCM_DTR, DMBIC); 924 925 /* Disable receiver (leave transmitter enabled). */ 926 com->channel_control = CD1400_CCR_CMDCHANCTL 927 | CD1400_CCR_XMTEN 928 | CD1400_CCR_RCVDIS; 929 cd1400_channel_cmd(com, com->channel_control); 930 931 if (com->dtr_wait != 0 && !(com->state & CS_DTR_OFF)) { 932 timeout(siodtrwakeup, com, com->dtr_wait); 933 com->state |= CS_DTR_OFF; 934 } 935 } 936 } 937#if 0 938 if (com->hasfifo) { 939 /* 940 * Disable fifos so that they are off after controlled 941 * reboots. Some BIOSes fail to detect 16550s when the 942 * fifos are enabled. 943 */ 944 outb(iobase + com_fifo, 0); 945 } 946#endif 947 com->active_out = FALSE; 948 wakeup(&com->active_out); 949 wakeup(TSA_CARR_ON(tp)); /* restart any wopeners */ 950 splx(s); 951} 952 953static int 954siowrite(dev, uio, flag) 955 dev_t dev; 956 struct uio *uio; 957 int flag; 958{ 959 int mynor; 960 struct tty *tp; 961 int unit; 962 963 mynor = minor(dev); 964 if (mynor & CONTROL_MASK) 965 return (ENODEV); 966 967 unit = MINOR_TO_UNIT(mynor); 968 tp = com_addr(unit)->tp; 969 /* 970 * (XXX) We disallow virtual consoles if the physical console is 971 * a serial port. This is in case there is a display attached that 972 * is not the console. In that situation we don't need/want the X 973 * server taking over the console. 974 */ 975 if (constty != NULL && unit == comconsole) 976 constty = NULL; 977#ifdef Smarts 978 /* XXX duplicate ttwrite(), but without so much output processing on 979 * CR & LF chars. Hardly worth the effort, given that high-throughput 980 * sessions are raw anyhow. 981 */ 982#else 983 return ((*linesw[tp->t_line].l_write)(tp, uio, flag)); 984#endif 985} 986 987static void 988siodtrwakeup(chan) 989 void *chan; 990{ 991 struct com_s *com; 992 993 com = (struct com_s *)chan; 994 com->state &= ~CS_DTR_OFF; 995 wakeup(&com->dtr_wait); 996} 997 998/* 999 * This function: 1000 * a) needs to be called with COM_LOCK() held, and 1001 * b) needs to return with COM_LOCK() held. 1002 */ 1003static void 1004sioinput(com) 1005 struct com_s *com; 1006{ 1007 u_char *buf; 1008 int incc; 1009 u_char line_status; 1010 int recv_data; 1011 struct tty *tp; 1012 int intrsave; 1013 1014 buf = com->ibuf; 1015 tp = com->tp; 1016 if (!(tp->t_state & TS_ISOPEN)) { 1017 com_events -= (com->iptr - com->ibuf); 1018 com->iptr = com->ibuf; 1019 return; 1020 } 1021 if (tp->t_state & TS_CAN_BYPASS_L_RINT) { 1022 /* 1023 * Avoid the grotesquely inefficient lineswitch routine 1024 * (ttyinput) in "raw" mode. It usually takes about 450 1025 * instructions (that's without canonical processing or echo!). 1026 * slinput is reasonably fast (usually 40 instructions plus 1027 * call overhead). 1028 */ 1029 1030 do { 1031 /* 1032 * This may look odd, but it is using save-and-enable 1033 * semantics instead of the save-and-disable semantics 1034 * that are used everywhere else. 1035 */ 1036 intrsave = save_intr(); 1037 COM_UNLOCK(); 1038 enable_intr(); 1039 incc = com->iptr - buf; 1040 if (tp->t_rawq.c_cc + incc > tp->t_ihiwat 1041 && (com->state & CS_RTS_IFLOW 1042 || tp->t_iflag & IXOFF) 1043 && !(tp->t_state & TS_TBLOCK)) 1044 ttyblock(tp); 1045 com->delta_error_counts[CE_TTY_BUF_OVERFLOW] 1046 += b_to_q((char *)buf, incc, &tp->t_rawq); 1047 buf += incc; 1048 tk_nin += incc; 1049 tk_rawcc += incc; 1050 tp->t_rawcc += incc; 1051 ttwakeup(tp); 1052 if (tp->t_state & TS_TTSTOP 1053 && (tp->t_iflag & IXANY 1054 || tp->t_cc[VSTART] == tp->t_cc[VSTOP])) { 1055 tp->t_state &= ~TS_TTSTOP; 1056 tp->t_lflag &= ~FLUSHO; 1057 comstart(tp); 1058 } 1059 restore_intr(intrsave); 1060 COM_LOCK(); 1061 } while (buf < com->iptr); 1062 } else { 1063 do { 1064 /* 1065 * This may look odd, but it is using save-and-enable 1066 * semantics instead of the save-and-disable semantics 1067 * that are used everywhere else. 1068 */ 1069 intrsave = save_intr(); 1070 COM_UNLOCK(); 1071 enable_intr(); 1072 line_status = buf[com->ierroff]; 1073 recv_data = *buf++; 1074 if (line_status 1075 & (LSR_BI | LSR_FE | LSR_OE | LSR_PE)) { 1076 if (line_status & LSR_BI) 1077 recv_data |= TTY_BI; 1078 if (line_status & LSR_FE) 1079 recv_data |= TTY_FE; 1080 if (line_status & LSR_OE) 1081 recv_data |= TTY_OE; 1082 if (line_status & LSR_PE) 1083 recv_data |= TTY_PE; 1084 } 1085 (*linesw[tp->t_line].l_rint)(recv_data, tp); 1086 restore_intr(intrsave); 1087 COM_LOCK(); 1088 } while (buf < com->iptr); 1089 } 1090 com_events -= (com->iptr - com->ibuf); 1091 com->iptr = com->ibuf; 1092 1093 /* 1094 * There is now room for another low-level buffer full of input, 1095 * so enable RTS if it is now disabled and there is room in the 1096 * high-level buffer. 1097 */ 1098 if ((com->state & CS_RTS_IFLOW) && !(com->mcr_image & com->mcr_rts) && 1099 !(tp->t_state & TS_TBLOCK)) 1100#if 0 1101 outb(com->modem_ctl_port, com->mcr_image |= MCR_RTS); 1102#else 1103 cd_setreg(com, com->mcr_rts_reg, 1104 com->mcr_image |= com->mcr_rts); 1105#endif 1106} 1107 1108void 1109siointr(unit) 1110 int unit; 1111{ 1112 int baseu; 1113 int cy_align; 1114 cy_addr cy_iobase; 1115 int cyu; 1116 cy_addr iobase; 1117 u_char status; 1118 1119 COM_LOCK(); /* XXX could this be placed down lower in the loop? */ 1120 1121 baseu = unit * CY_MAX_PORTS; 1122 cy_align = com_addr(baseu)->cy_align; 1123 cy_iobase = com_addr(baseu)->cy_iobase; 1124 1125 /* check each CD1400 in turn */ 1126 for (cyu = 0; cyu < cy_nr_cd1400s[unit]; ++cyu) { 1127 iobase = (cy_addr) (cy_iobase 1128 + (cy_chip_offset[cyu] << cy_align)); 1129 /* poll to see if it has any work */ 1130 status = cd_inb(iobase, CD1400_SVRR, cy_align); 1131 if (status == 0) 1132 continue; 1133#ifdef CyDebug 1134 ++cy_svrr_probes; 1135#endif 1136 /* service requests as appropriate, giving priority to RX */ 1137 if (status & CD1400_SVRR_RXRDY) { 1138 struct com_s *com; 1139 u_int count; 1140 u_char *ioptr; 1141 u_char line_status; 1142 u_char recv_data; 1143 u_char serv_type; 1144#ifdef PollMode 1145 u_char save_rir; 1146#endif 1147 1148#ifdef PollMode 1149 save_rir = cd_inb(iobase, CD1400_RIR, cy_align); 1150 1151 /* enter rx service */ 1152 cd_outb(iobase, CD1400_CAR, cy_align, save_rir); 1153 com_addr(baseu + cyu * CD1400_NO_OF_CHANNELS)->car 1154 = save_rir & CD1400_CAR_CHAN; 1155 1156 serv_type = cd_inb(iobase, CD1400_RIVR, cy_align); 1157 com = com_addr(baseu 1158 + ((serv_type >> CD1400_xIVR_CHAN_SHIFT) 1159 & CD1400_xIVR_CHAN)); 1160#else 1161 /* ack receive service */ 1162 serv_type = cy_inb(iobase, CY8_SVCACKR, cy_align); 1163 1164 com = com_addr(baseu + 1165 + ((serv_type >> CD1400_xIVR_CHAN_SHIFT) 1166 & CD1400_xIVR_CHAN)); 1167#endif 1168 1169 if (serv_type & CD1400_RIVR_EXCEPTION) { 1170 ++com->recv_exception; 1171 line_status = cd_inb(iobase, CD1400_RDSR, cy_align); 1172 /* break/unnattached error bits or real input? */ 1173 recv_data = cd_inb(iobase, CD1400_RDSR, cy_align); 1174#ifndef SOFT_HOTCHAR 1175 if (line_status & CD1400_RDSR_SPECIAL 1176 && com->hotchar != 0) 1177 sched_swi(sio_ih, SWI_NOSWITCH); 1178 1179#endif 1180#if 1 /* XXX "intelligent" PFO error handling would break O error handling */ 1181 if (line_status & (LSR_PE|LSR_FE|LSR_BI)) { 1182 /* 1183 Don't store PE if IGNPAR and BI if IGNBRK, 1184 this hack allows "raw" tty optimization 1185 works even if IGN* is set. 1186 */ 1187 if ( com->tp == NULL 1188 || !(com->tp->t_state & TS_ISOPEN) 1189 || ((line_status & (LSR_PE|LSR_FE)) 1190 && (com->tp->t_iflag & IGNPAR)) 1191 || ((line_status & LSR_BI) 1192 && (com->tp->t_iflag & IGNBRK))) 1193 goto cont; 1194 if ( (line_status & (LSR_PE|LSR_FE)) 1195 && (com->tp->t_state & TS_CAN_BYPASS_L_RINT) 1196 && ((line_status & LSR_FE) 1197 || ((line_status & LSR_PE) 1198 && (com->tp->t_iflag & INPCK)))) 1199 recv_data = 0; 1200 } 1201#endif /* 1 */ 1202 ++com->bytes_in; 1203#ifdef SOFT_HOTCHAR 1204 if (com->hotchar != 0 && recv_data == com->hotchar) 1205 sched_swi(sio_ih, SWI_NOSWITCH); 1206#endif 1207 ioptr = com->iptr; 1208 if (ioptr >= com->ibufend) 1209 CE_RECORD(com, CE_INTERRUPT_BUF_OVERFLOW); 1210 else { 1211 if (com->do_timestamp) 1212 microtime(&com->timestamp); 1213 ++com_events; 1214 ioptr[0] = recv_data; 1215 ioptr[com->ierroff] = line_status; 1216 com->iptr = ++ioptr; 1217 if (ioptr == com->ihighwater 1218 && com->state & CS_RTS_IFLOW) 1219#if 0 1220 outb(com->modem_ctl_port, 1221 com->mcr_image &= ~MCR_RTS); 1222#else 1223 cd_outb(iobase, com->mcr_rts_reg, 1224 cy_align, 1225 com->mcr_image &= 1226 ~com->mcr_rts); 1227#endif 1228 if (line_status & LSR_OE) 1229 CE_RECORD(com, CE_OVERRUN); 1230 } 1231 goto cont; 1232 } else { 1233 int ifree; 1234 1235 count = cd_inb(iobase, CD1400_RDCR, cy_align); 1236 if (!count) 1237 goto cont; 1238 com->bytes_in += count; 1239 ioptr = com->iptr; 1240 ifree = com->ibufend - ioptr; 1241 if (count > ifree) { 1242 count -= ifree; 1243 com_events += ifree; 1244 if (ifree != 0) { 1245 if (com->do_timestamp) 1246 microtime(&com->timestamp); 1247 do { 1248 recv_data = cd_inb(iobase, 1249 CD1400_RDSR, 1250 cy_align); 1251#ifdef SOFT_HOTCHAR 1252 if (com->hotchar != 0 1253 && recv_data 1254 == com->hotchar) 1255 sched_swi(sio_ih, SWI_NOSWITCH); 1256#endif 1257 ioptr[0] = recv_data; 1258 ioptr[com->ierroff] = 0; 1259 ++ioptr; 1260 } while (--ifree != 0); 1261 } 1262 com->delta_error_counts 1263 [CE_INTERRUPT_BUF_OVERFLOW] += count; 1264 do { 1265 recv_data = cd_inb(iobase, CD1400_RDSR, 1266 cy_align); 1267#ifdef SOFT_HOTCHAR 1268 if (com->hotchar != 0 1269 && recv_data == com->hotchar) 1270 sched_swi(sio_ih, SWI_NOSWITCH); 1271#endif 1272 } while (--count != 0); 1273 } else { 1274 if (com->do_timestamp) 1275 microtime(&com->timestamp); 1276 if (ioptr <= com->ihighwater 1277 && ioptr + count > com->ihighwater 1278 && com->state & CS_RTS_IFLOW) 1279#if 0 1280 outb(com->modem_ctl_port, 1281 com->mcr_image &= ~MCR_RTS); 1282#else 1283 cd_outb(iobase, com->mcr_rts_reg, 1284 cy_align, 1285 com->mcr_image 1286 &= ~com->mcr_rts); 1287#endif 1288 com_events += count; 1289 do { 1290 recv_data = cd_inb(iobase, CD1400_RDSR, 1291 cy_align); 1292#ifdef SOFT_HOTCHAR 1293 if (com->hotchar != 0 1294 && recv_data == com->hotchar) 1295 sched_swi(sio_ih, SWI_NOSWITCH); 1296#endif 1297 ioptr[0] = recv_data; 1298 ioptr[com->ierroff] = 0; 1299 ++ioptr; 1300 } while (--count != 0); 1301 } 1302 com->iptr = ioptr; 1303 } 1304cont: 1305 1306 /* terminate service context */ 1307#ifdef PollMode 1308 cd_outb(iobase, CD1400_RIR, cy_align, 1309 save_rir 1310 & ~(CD1400_RIR_RDIREQ | CD1400_RIR_RBUSY)); 1311#else 1312 cd_outb(iobase, CD1400_EOSRR, cy_align, 0); 1313#endif 1314 } 1315 if (status & CD1400_SVRR_MDMCH) { 1316 struct com_s *com; 1317 u_char modem_status; 1318#ifdef PollMode 1319 u_char save_mir; 1320#else 1321 u_char vector; 1322#endif 1323 1324#ifdef PollMode 1325 save_mir = cd_inb(iobase, CD1400_MIR, cy_align); 1326 1327 /* enter modem service */ 1328 cd_outb(iobase, CD1400_CAR, cy_align, save_mir); 1329 com_addr(baseu + cyu * CD1400_NO_OF_CHANNELS)->car 1330 = save_mir & CD1400_CAR_CHAN; 1331 1332 com = com_addr(baseu + cyu * CD1400_NO_OF_CHANNELS 1333 + (save_mir & CD1400_MIR_CHAN)); 1334#else 1335 /* ack modem service */ 1336 vector = cy_inb(iobase, CY8_SVCACKM, cy_align); 1337 1338 com = com_addr(baseu 1339 + ((vector >> CD1400_xIVR_CHAN_SHIFT) 1340 & CD1400_xIVR_CHAN)); 1341#endif 1342 ++com->mdm; 1343 modem_status = cd_inb(iobase, CD1400_MSVR2, cy_align); 1344 if (modem_status != com->last_modem_status) { 1345 if (com->do_dcd_timestamp 1346 && !(com->last_modem_status & MSR_DCD) 1347 && modem_status & MSR_DCD) 1348 microtime(&com->dcd_timestamp); 1349 1350 /* 1351 * Schedule high level to handle DCD changes. Note 1352 * that we don't use the delta bits anywhere. Some 1353 * UARTs mess them up, and it's easy to remember the 1354 * previous bits and calculate the delta. 1355 */ 1356 com->last_modem_status = modem_status; 1357 if (!(com->state & CS_CHECKMSR)) { 1358 com_events += LOTS_OF_EVENTS; 1359 com->state |= CS_CHECKMSR; 1360 sched_swi(sio_ih, SWI_NOSWITCH); 1361 } 1362 1363#ifdef SOFT_CTS_OFLOW 1364 /* handle CTS change immediately for crisp flow ctl */ 1365 if (com->state & CS_CTS_OFLOW) { 1366 if (modem_status & MSR_CTS) { 1367 com->state |= CS_ODEVREADY; 1368 if (com->state >= (CS_BUSY | CS_TTGO 1369 | CS_ODEVREADY) 1370 && !(com->intr_enable 1371 & CD1400_SRER_TXRDY)) 1372 cd_outb(iobase, CD1400_SRER, 1373 cy_align, 1374 com->intr_enable 1375 = com->intr_enable 1376 & ~CD1400_SRER_TXMPTY 1377 | CD1400_SRER_TXRDY); 1378 } else { 1379 com->state &= ~CS_ODEVREADY; 1380 if (com->intr_enable 1381 & CD1400_SRER_TXRDY) 1382 cd_outb(iobase, CD1400_SRER, 1383 cy_align, 1384 com->intr_enable 1385 = com->intr_enable 1386 & ~CD1400_SRER_TXRDY 1387 | CD1400_SRER_TXMPTY); 1388 } 1389 } 1390#endif 1391 } 1392 1393 /* terminate service context */ 1394#ifdef PollMode 1395 cd_outb(iobase, CD1400_MIR, cy_align, 1396 save_mir 1397 & ~(CD1400_MIR_RDIREQ | CD1400_MIR_RBUSY)); 1398#else 1399 cd_outb(iobase, CD1400_EOSRR, cy_align, 0); 1400#endif 1401 } 1402 if (status & CD1400_SVRR_TXRDY) { 1403 struct com_s *com; 1404#ifdef PollMode 1405 u_char save_tir; 1406#else 1407 u_char vector; 1408#endif 1409 1410#ifdef PollMode 1411 save_tir = cd_inb(iobase, CD1400_TIR, cy_align); 1412 1413 /* enter tx service */ 1414 cd_outb(iobase, CD1400_CAR, cy_align, save_tir); 1415 com_addr(baseu + cyu * CD1400_NO_OF_CHANNELS)->car 1416 = save_tir & CD1400_CAR_CHAN; 1417 1418 com = com_addr(baseu 1419 + cyu * CD1400_NO_OF_CHANNELS 1420 + (save_tir & CD1400_TIR_CHAN)); 1421#else 1422 /* ack transmit service */ 1423 vector = cy_inb(iobase, CY8_SVCACKT, cy_align); 1424 1425 com = com_addr(baseu 1426 + ((vector >> CD1400_xIVR_CHAN_SHIFT) 1427 & CD1400_xIVR_CHAN)); 1428#endif 1429 1430 if (com->etc != ETC_NONE) { 1431 if (com->intr_enable & CD1400_SRER_TXRDY) { 1432 /* 1433 * Here due to sloppy SRER_TXRDY 1434 * enabling. Ignore. Come back when 1435 * tx is empty. 1436 */ 1437 cd_outb(iobase, CD1400_SRER, cy_align, 1438 com->intr_enable 1439 = (com->intr_enable 1440 & ~CD1400_SRER_TXRDY) 1441 | CD1400_SRER_TXMPTY); 1442 goto terminate_tx_service; 1443 } 1444 switch (com->etc) { 1445 case CD1400_ETC_SENDBREAK: 1446 case CD1400_ETC_STOPBREAK: 1447 /* 1448 * Start the command. Come back on 1449 * next tx empty interrupt, hopefully 1450 * after command has been executed. 1451 */ 1452 cd_outb(iobase, CD1400_COR2, cy_align, 1453 com->cor[1] |= CD1400_COR2_ETC); 1454 cd_outb(iobase, CD1400_TDR, cy_align, 1455 CD1400_ETC_CMD); 1456 cd_outb(iobase, CD1400_TDR, cy_align, 1457 com->etc); 1458 if (com->etc == CD1400_ETC_SENDBREAK) 1459 com->etc = ETC_BREAK_STARTING; 1460 else 1461 com->etc = ETC_BREAK_ENDING; 1462 goto terminate_tx_service; 1463 case ETC_BREAK_STARTING: 1464 /* 1465 * BREAK is now on. Continue with 1466 * SRER_TXMPTY processing, hopefully 1467 * don't come back. 1468 */ 1469 com->etc = ETC_BREAK_STARTED; 1470 break; 1471 case ETC_BREAK_STARTED: 1472 /* 1473 * Came back due to sloppy SRER_TXMPTY 1474 * enabling. Hope again. 1475 */ 1476 break; 1477 case ETC_BREAK_ENDING: 1478 /* 1479 * BREAK is now off. Continue with 1480 * SRER_TXMPTY processing and don't 1481 * come back. The SWI handler will 1482 * restart tx interrupts if necessary. 1483 */ 1484 cd_outb(iobase, CD1400_COR2, cy_align, 1485 com->cor[1] 1486 &= ~CD1400_COR2_ETC); 1487 com->etc = ETC_BREAK_ENDED; 1488 if (!(com->state & CS_ODONE)) { 1489 com_events += LOTS_OF_EVENTS; 1490 com->state |= CS_ODONE; 1491 sched_swi(sio_ih, SWI_NOSWITCH); 1492 } 1493 break; 1494 case ETC_BREAK_ENDED: 1495 /* 1496 * Shouldn't get here. Hope again. 1497 */ 1498 break; 1499 } 1500 } 1501 if (com->intr_enable & CD1400_SRER_TXMPTY) { 1502 if (!(com->extra_state & CSE_ODONE)) { 1503 com_events += LOTS_OF_EVENTS; 1504 com->extra_state |= CSE_ODONE; 1505 sched_swi(sio_ih, SWI_NOSWITCH); 1506 } 1507 cd_outb(iobase, CD1400_SRER, cy_align, 1508 com->intr_enable 1509 &= ~CD1400_SRER_TXMPTY); 1510 goto terminate_tx_service; 1511 } 1512 if (com->state >= (CS_BUSY | CS_TTGO | CS_ODEVREADY)) { 1513 u_char *ioptr; 1514 u_int ocount; 1515 1516 ioptr = com->obufq.l_head; 1517 ocount = com->obufq.l_tail - ioptr; 1518 if (ocount > CD1400_TX_FIFO_SIZE) 1519 ocount = CD1400_TX_FIFO_SIZE; 1520 com->bytes_out += ocount; 1521 do 1522 cd_outb(iobase, CD1400_TDR, cy_align, 1523 *ioptr++); 1524 while (--ocount != 0); 1525 com->obufq.l_head = ioptr; 1526 if (ioptr >= com->obufq.l_tail) { 1527 struct lbq *qp; 1528 1529 qp = com->obufq.l_next; 1530 qp->l_queued = FALSE; 1531 qp = qp->l_next; 1532 if (qp != NULL) { 1533 com->obufq.l_head = qp->l_head; 1534 com->obufq.l_tail = qp->l_tail; 1535 com->obufq.l_next = qp; 1536 } else { 1537 /* output just completed */ 1538 com->state &= ~CS_BUSY; 1539 1540 /* 1541 * The setting of CSE_ODONE may be 1542 * stale here. We currently only 1543 * use it when CS_BUSY is set, and 1544 * fixing it when we clear CS_BUSY 1545 * is easiest. 1546 */ 1547 if (com->extra_state & CSE_ODONE) { 1548 com_events -= LOTS_OF_EVENTS; 1549 com->extra_state &= ~CSE_ODONE; 1550 } 1551 1552 cd_outb(iobase, CD1400_SRER, cy_align, 1553 com->intr_enable 1554 = (com->intr_enable 1555 & ~CD1400_SRER_TXRDY) 1556 | CD1400_SRER_TXMPTY); 1557 } 1558 if (!(com->state & CS_ODONE)) { 1559 com_events += LOTS_OF_EVENTS; 1560 com->state |= CS_ODONE; 1561 1562 /* handle at high level ASAP */ 1563 sched_swi(sio_ih, SWI_NOSWITCH); 1564 } 1565 } 1566 } 1567 1568 /* terminate service context */ 1569terminate_tx_service: 1570#ifdef PollMode 1571 cd_outb(iobase, CD1400_TIR, cy_align, 1572 save_tir 1573 & ~(CD1400_TIR_RDIREQ | CD1400_TIR_RBUSY)); 1574#else 1575 cd_outb(iobase, CD1400_EOSRR, cy_align, 0); 1576#endif 1577 } 1578 } 1579 1580 /* ensure an edge for the next interrupt */ 1581 cy_outb(cy_iobase, CY_CLEAR_INTR, cy_align, 0); 1582 1583 sched_swi(sio_ih, SWI_NOSWITCH); 1584 1585 COM_UNLOCK(); 1586} 1587 1588#if 0 1589static void 1590siointr1(com) 1591 struct com_s *com; 1592{ 1593} 1594#endif 1595 1596static int 1597sioioctl(dev, cmd, data, flag, p) 1598 dev_t dev; 1599 u_long cmd; 1600 caddr_t data; 1601 int flag; 1602 struct proc *p; 1603{ 1604 struct com_s *com; 1605 int error; 1606 int mynor; 1607 int s; 1608 struct tty *tp; 1609#if defined(COMPAT_43) || defined(COMPAT_SUNOS) 1610 int oldcmd; 1611 struct termios term; 1612#endif 1613 1614 mynor = minor(dev); 1615 com = com_addr(MINOR_TO_UNIT(mynor)); 1616 if (mynor & CONTROL_MASK) { 1617 struct termios *ct; 1618 1619 switch (mynor & CONTROL_MASK) { 1620 case CONTROL_INIT_STATE: 1621 ct = mynor & CALLOUT_MASK ? &com->it_out : &com->it_in; 1622 break; 1623 case CONTROL_LOCK_STATE: 1624 ct = mynor & CALLOUT_MASK ? &com->lt_out : &com->lt_in; 1625 break; 1626 default: 1627 return (ENODEV); /* /dev/nodev */ 1628 } 1629 switch (cmd) { 1630 case TIOCSETA: 1631 error = suser(p); 1632 if (error != 0) 1633 return (error); 1634 *ct = *(struct termios *)data; 1635 return (0); 1636 case TIOCGETA: 1637 *(struct termios *)data = *ct; 1638 return (0); 1639 case TIOCGETD: 1640 *(int *)data = TTYDISC; 1641 return (0); 1642 case TIOCGWINSZ: 1643 bzero(data, sizeof(struct winsize)); 1644 return (0); 1645 default: 1646 return (ENOTTY); 1647 } 1648 } 1649 tp = com->tp; 1650#if defined(COMPAT_43) || defined(COMPAT_SUNOS) 1651 term = tp->t_termios; 1652 oldcmd = cmd; 1653 error = ttsetcompat(tp, &cmd, data, &term); 1654 if (error != 0) 1655 return (error); 1656 if (cmd != oldcmd) 1657 data = (caddr_t)&term; 1658#endif 1659 if (cmd == TIOCSETA || cmd == TIOCSETAW || cmd == TIOCSETAF) { 1660 int cc; 1661 struct termios *dt = (struct termios *)data; 1662 struct termios *lt = mynor & CALLOUT_MASK 1663 ? &com->lt_out : &com->lt_in; 1664 1665 dt->c_iflag = (tp->t_iflag & lt->c_iflag) 1666 | (dt->c_iflag & ~lt->c_iflag); 1667 dt->c_oflag = (tp->t_oflag & lt->c_oflag) 1668 | (dt->c_oflag & ~lt->c_oflag); 1669 dt->c_cflag = (tp->t_cflag & lt->c_cflag) 1670 | (dt->c_cflag & ~lt->c_cflag); 1671 dt->c_lflag = (tp->t_lflag & lt->c_lflag) 1672 | (dt->c_lflag & ~lt->c_lflag); 1673 for (cc = 0; cc < NCCS; ++cc) 1674 if (lt->c_cc[cc] != 0) 1675 dt->c_cc[cc] = tp->t_cc[cc]; 1676 if (lt->c_ispeed != 0) 1677 dt->c_ispeed = tp->t_ispeed; 1678 if (lt->c_ospeed != 0) 1679 dt->c_ospeed = tp->t_ospeed; 1680 } 1681 error = (*linesw[tp->t_line].l_ioctl)(tp, cmd, data, flag, p); 1682 if (error != ENOIOCTL) 1683 return (error); 1684 s = spltty(); 1685 error = ttioctl(tp, cmd, data, flag); 1686 disc_optim(tp, &tp->t_termios, com); 1687 if (error != ENOIOCTL) { 1688 splx(s); 1689 return (error); 1690 } 1691 switch (cmd) { 1692 case TIOCSBRK: 1693#if 0 1694 outb(iobase + com_cfcr, com->cfcr_image |= CFCR_SBREAK); 1695#else 1696 cd_etc(com, CD1400_ETC_SENDBREAK); 1697#endif 1698 break; 1699 case TIOCCBRK: 1700#if 0 1701 outb(iobase + com_cfcr, com->cfcr_image &= ~CFCR_SBREAK); 1702#else 1703 cd_etc(com, CD1400_ETC_STOPBREAK); 1704#endif 1705 break; 1706 case TIOCSDTR: 1707 (void)commctl(com, TIOCM_DTR, DMBIS); 1708 break; 1709 case TIOCCDTR: 1710 (void)commctl(com, TIOCM_DTR, DMBIC); 1711 break; 1712 /* 1713 * XXX should disallow changing MCR_RTS if CS_RTS_IFLOW is set. The 1714 * changes get undone on the next call to comparam(). 1715 */ 1716 case TIOCMSET: 1717 (void)commctl(com, *(int *)data, DMSET); 1718 break; 1719 case TIOCMBIS: 1720 (void)commctl(com, *(int *)data, DMBIS); 1721 break; 1722 case TIOCMBIC: 1723 (void)commctl(com, *(int *)data, DMBIC); 1724 break; 1725 case TIOCMGET: 1726 *(int *)data = commctl(com, 0, DMGET); 1727 break; 1728 case TIOCMSDTRWAIT: 1729 /* must be root since the wait applies to following logins */ 1730 error = suser(p); 1731 if (error != 0) { 1732 splx(s); 1733 return (error); 1734 } 1735 com->dtr_wait = *(int *)data * hz / 100; 1736 break; 1737 case TIOCMGDTRWAIT: 1738 *(int *)data = com->dtr_wait * 100 / hz; 1739 break; 1740 case TIOCTIMESTAMP: 1741 com->do_timestamp = TRUE; 1742 *(struct timeval *)data = com->timestamp; 1743 break; 1744 case TIOCDCDTIMESTAMP: 1745 com->do_dcd_timestamp = TRUE; 1746 *(struct timeval *)data = com->dcd_timestamp; 1747 break; 1748 default: 1749 splx(s); 1750 return (ENOTTY); 1751 } 1752 splx(s); 1753 return (0); 1754} 1755 1756static void 1757siopoll(void *arg) 1758{ 1759 int unit; 1760 int intrsave; 1761 1762#ifdef CyDebug 1763 ++cy_timeouts; 1764#endif 1765 if (com_events == 0) 1766 return; 1767repeat: 1768 for (unit = 0; unit < NSIO; ++unit) { 1769 struct com_s *com; 1770 int incc; 1771 struct tty *tp; 1772 1773 com = com_addr(unit); 1774 if (com == NULL) 1775 continue; 1776 tp = com->tp; 1777 if (tp == NULL) { 1778 /* 1779 * XXX forget any events related to closed devices 1780 * (actually never opened devices) so that we don't 1781 * loop. 1782 */ 1783 intrsave = save_intr(); 1784 disable_intr(); 1785 COM_LOCK(); 1786 incc = com->iptr - com->ibuf; 1787 com->iptr = com->ibuf; 1788 if (com->state & CS_CHECKMSR) { 1789 incc += LOTS_OF_EVENTS; 1790 com->state &= ~CS_CHECKMSR; 1791 } 1792 com_events -= incc; 1793 COM_UNLOCK(); 1794 restore_intr(intrsave); 1795 if (incc != 0) 1796 log(LOG_DEBUG, 1797 "sio%d: %d events for device with no tp\n", 1798 unit, incc); 1799 continue; 1800 } 1801 if (com->iptr != com->ibuf) { 1802 intrsave = save_intr(); 1803 disable_intr(); 1804 COM_LOCK(); 1805 sioinput(com); 1806 COM_UNLOCK(); 1807 restore_intr(intrsave); 1808 } 1809 if (com->state & CS_CHECKMSR) { 1810 u_char delta_modem_status; 1811 1812 intrsave = save_intr(); 1813 disable_intr(); 1814 COM_LOCK(); 1815 sioinput(com); 1816 delta_modem_status = com->last_modem_status 1817 ^ com->prev_modem_status; 1818 com->prev_modem_status = com->last_modem_status; 1819 com_events -= LOTS_OF_EVENTS; 1820 com->state &= ~CS_CHECKMSR; 1821 COM_UNLOCK(); 1822 restore_intr(intrsave); 1823 if (delta_modem_status & MSR_DCD) 1824 (*linesw[tp->t_line].l_modem) 1825 (tp, com->prev_modem_status & MSR_DCD); 1826 } 1827 if (com->extra_state & CSE_ODONE) { 1828 intrsave = save_intr(); 1829 disable_intr(); 1830 COM_LOCK(); 1831 com_events -= LOTS_OF_EVENTS; 1832 com->extra_state &= ~CSE_ODONE; 1833 COM_UNLOCK(); 1834 restore_intr(intrsave); 1835 if (!(com->state & CS_BUSY)) { 1836 tp->t_state &= ~TS_BUSY; 1837 ttwwakeup(com->tp); 1838 } 1839 if (com->etc != ETC_NONE) { 1840 if (com->etc == ETC_BREAK_ENDED) 1841 com->etc = ETC_NONE; 1842 wakeup(&com->etc); 1843 } 1844 } 1845 if (com->state & CS_ODONE) { 1846 intrsave = save_intr(); 1847 disable_intr(); 1848 COM_LOCK(); 1849 com_events -= LOTS_OF_EVENTS; 1850 com->state &= ~CS_ODONE; 1851 COM_UNLOCK(); 1852 restore_intr(intrsave); 1853 (*linesw[tp->t_line].l_start)(tp); 1854 } 1855 if (com_events == 0) 1856 break; 1857 } 1858 if (com_events >= LOTS_OF_EVENTS) 1859 goto repeat; 1860} 1861 1862static int 1863comparam(tp, t) 1864 struct tty *tp; 1865 struct termios *t; 1866{ 1867 int bits; 1868 int cflag; 1869 struct com_s *com; 1870 u_char cor_change; 1871 u_long cy_clock; 1872 int idivisor; 1873 int iflag; 1874 int iprescaler; 1875 int itimeout; 1876 int odivisor; 1877 int oprescaler; 1878 u_char opt; 1879 int s; 1880 int unit; 1881 int intrsave; 1882 1883 /* do historical conversions */ 1884 if (t->c_ispeed == 0) 1885 t->c_ispeed = t->c_ospeed; 1886 1887 unit = DEV_TO_UNIT(tp->t_dev); 1888 com = com_addr(unit); 1889 1890 /* check requested parameters */ 1891 cy_clock = CY_CLOCK(com->gfrcr_image); 1892 idivisor = comspeed(t->c_ispeed, cy_clock, &iprescaler); 1893 if (idivisor < 0) 1894 return (EINVAL); 1895 odivisor = comspeed(t->c_ospeed, cy_clock, &oprescaler); 1896 if (odivisor < 0) 1897 return (EINVAL); 1898 1899 /* parameters are OK, convert them to the com struct and the device */ 1900 s = spltty(); 1901 if (odivisor == 0) 1902 (void)commctl(com, TIOCM_DTR, DMBIC); /* hang up line */ 1903 else 1904 (void)commctl(com, TIOCM_DTR, DMBIS); 1905 1906 (void) siosetwater(com, t->c_ispeed); 1907 1908 /* XXX we don't actually change the speed atomically. */ 1909 1910 if (idivisor != 0) { 1911 cd_setreg(com, CD1400_RBPR, idivisor); 1912 cd_setreg(com, CD1400_RCOR, iprescaler); 1913 } 1914 if (odivisor != 0) { 1915 cd_setreg(com, CD1400_TBPR, odivisor); 1916 cd_setreg(com, CD1400_TCOR, oprescaler); 1917 } 1918 1919 /* 1920 * channel control 1921 * receiver enable 1922 * transmitter enable (always set) 1923 */ 1924 cflag = t->c_cflag; 1925 opt = CD1400_CCR_CMDCHANCTL | CD1400_CCR_XMTEN 1926 | (cflag & CREAD ? CD1400_CCR_RCVEN : CD1400_CCR_RCVDIS); 1927 if (opt != com->channel_control) { 1928 com->channel_control = opt; 1929 cd1400_channel_cmd(com, opt); 1930 } 1931 1932#ifdef Smarts 1933 /* set special chars */ 1934 /* XXX if one is _POSIX_VDISABLE, can't use some others */ 1935 if (t->c_cc[VSTOP] != _POSIX_VDISABLE) 1936 cd_setreg(com, CD1400_SCHR1, t->c_cc[VSTOP]); 1937 if (t->c_cc[VSTART] != _POSIX_VDISABLE) 1938 cd_setreg(com, CD1400_SCHR2, t->c_cc[VSTART]); 1939 if (t->c_cc[VINTR] != _POSIX_VDISABLE) 1940 cd_setreg(com, CD1400_SCHR3, t->c_cc[VINTR]); 1941 if (t->c_cc[VSUSP] != _POSIX_VDISABLE) 1942 cd_setreg(com, CD1400_SCHR4, t->c_cc[VSUSP]); 1943#endif 1944 1945 /* 1946 * set channel option register 1 - 1947 * parity mode 1948 * stop bits 1949 * char length 1950 */ 1951 opt = 0; 1952 /* parity */ 1953 if (cflag & PARENB) { 1954 if (cflag & PARODD) 1955 opt |= CD1400_COR1_PARODD; 1956 opt |= CD1400_COR1_PARNORMAL; 1957 } 1958 iflag = t->c_iflag; 1959 if (!(iflag & INPCK)) 1960 opt |= CD1400_COR1_NOINPCK; 1961 bits = 1 + 1; 1962 /* stop bits */ 1963 if (cflag & CSTOPB) { 1964 ++bits; 1965 opt |= CD1400_COR1_STOP2; 1966 } 1967 /* char length */ 1968 switch (cflag & CSIZE) { 1969 case CS5: 1970 bits += 5; 1971 opt |= CD1400_COR1_CS5; 1972 break; 1973 case CS6: 1974 bits += 6; 1975 opt |= CD1400_COR1_CS6; 1976 break; 1977 case CS7: 1978 bits += 7; 1979 opt |= CD1400_COR1_CS7; 1980 break; 1981 default: 1982 bits += 8; 1983 opt |= CD1400_COR1_CS8; 1984 break; 1985 } 1986 cor_change = 0; 1987 if (opt != com->cor[0]) { 1988 cor_change |= CD1400_CCR_COR1; 1989 cd_setreg(com, CD1400_COR1, com->cor[0] = opt); 1990 } 1991 1992 /* 1993 * Set receive time-out period, normally to max(one char time, 5 ms). 1994 */ 1995 if (t->c_ispeed == 0) 1996 itimeout = cd_getreg(com, CD1400_RTPR); 1997 else { 1998 itimeout = (1000 * bits + t->c_ispeed - 1) / t->c_ispeed; 1999#ifdef SOFT_HOTCHAR 2000#define MIN_RTP 1 2001#else 2002#define MIN_RTP 5 2003#endif 2004 if (itimeout < MIN_RTP) 2005 itimeout = MIN_RTP; 2006 } 2007 if (!(t->c_lflag & ICANON) && t->c_cc[VMIN] != 0 && t->c_cc[VTIME] != 0 2008 && t->c_cc[VTIME] * 10 > itimeout) 2009 itimeout = t->c_cc[VTIME] * 10; 2010 if (itimeout > 255) 2011 itimeout = 255; 2012 cd_setreg(com, CD1400_RTPR, itimeout); 2013 2014 /* 2015 * set channel option register 2 - 2016 * flow control 2017 */ 2018 opt = 0; 2019#ifdef Smarts 2020 if (iflag & IXANY) 2021 opt |= CD1400_COR2_IXANY; 2022 if (iflag & IXOFF) 2023 opt |= CD1400_COR2_IXOFF; 2024#endif 2025#ifndef SOFT_CTS_OFLOW 2026 if (cflag & CCTS_OFLOW) 2027 opt |= CD1400_COR2_CCTS_OFLOW; 2028#endif 2029 intrsave = save_intr(); 2030 disable_intr(); 2031 COM_LOCK(); 2032 if (opt != com->cor[1]) { 2033 cor_change |= CD1400_CCR_COR2; 2034 cd_setreg(com, CD1400_COR2, com->cor[1] = opt); 2035 } 2036 COM_UNLOCK(); 2037 restore_intr(intrsave); 2038 2039 /* 2040 * set channel option register 3 - 2041 * receiver FIFO interrupt threshold 2042 * flow control 2043 */ 2044 opt = RxFifoThreshold; 2045#ifdef Smarts 2046 if (t->c_lflag & ICANON) 2047 opt |= CD1400_COR3_SCD34; /* detect INTR & SUSP chars */ 2048 if (iflag & IXOFF) 2049 /* detect and transparently handle START and STOP chars */ 2050 opt |= CD1400_COR3_FCT | CD1400_COR3_SCD12; 2051#endif 2052 if (opt != com->cor[2]) { 2053 cor_change |= CD1400_CCR_COR3; 2054 cd_setreg(com, CD1400_COR3, com->cor[2] = opt); 2055 } 2056 2057 /* notify the CD1400 if COR1-3 have changed */ 2058 if (cor_change) 2059 cd1400_channel_cmd(com, CD1400_CCR_CMDCORCHG | cor_change); 2060 2061 /* 2062 * set channel option register 4 - 2063 * CR/NL processing 2064 * break processing 2065 * received exception processing 2066 */ 2067 opt = 0; 2068 if (iflag & IGNCR) 2069 opt |= CD1400_COR4_IGNCR; 2070#ifdef Smarts 2071 /* 2072 * we need a new ttyinput() for this, as we don't want to 2073 * have ICRNL && INLCR being done in both layers, or to have 2074 * synchronisation problems 2075 */ 2076 if (iflag & ICRNL) 2077 opt |= CD1400_COR4_ICRNL; 2078 if (iflag & INLCR) 2079 opt |= CD1400_COR4_INLCR; 2080#endif 2081 if (iflag & IGNBRK) 2082 opt |= CD1400_COR4_IGNBRK | CD1400_COR4_NOBRKINT; 2083 /* 2084 * The `-ignbrk -brkint parmrk' case is not handled by the hardware, 2085 * so only tell the hardware about -brkint if -parmrk. 2086 */ 2087 if (!(iflag & (BRKINT | PARMRK))) 2088 opt |= CD1400_COR4_NOBRKINT; 2089#if 0 2090 /* XXX using this "intelligence" breaks reporting of overruns. */ 2091 if (iflag & IGNPAR) 2092 opt |= CD1400_COR4_PFO_DISCARD; 2093 else { 2094 if (iflag & PARMRK) 2095 opt |= CD1400_COR4_PFO_ESC; 2096 else 2097 opt |= CD1400_COR4_PFO_NUL; 2098 } 2099#else 2100 opt |= CD1400_COR4_PFO_EXCEPTION; 2101#endif 2102 cd_setreg(com, CD1400_COR4, opt); 2103 2104 /* 2105 * set channel option register 5 - 2106 */ 2107 opt = 0; 2108 if (iflag & ISTRIP) 2109 opt |= CD1400_COR5_ISTRIP; 2110 if (t->c_iflag & IEXTEN) 2111 /* enable LNEXT (e.g. ctrl-v quoting) handling */ 2112 opt |= CD1400_COR5_LNEXT; 2113#ifdef Smarts 2114 if (t->c_oflag & ONLCR) 2115 opt |= CD1400_COR5_ONLCR; 2116 if (t->c_oflag & OCRNL) 2117 opt |= CD1400_COR5_OCRNL; 2118#endif 2119 cd_setreg(com, CD1400_COR5, opt); 2120 2121 /* 2122 * We always generate modem status change interrupts for CD changes. 2123 * Among other things, this is necessary to track TS_CARR_ON for 2124 * pstat to print even when the driver doesn't care. CD changes 2125 * should be rare so interrupts for them are not worth extra code to 2126 * avoid. We avoid interrupts for other modem status changes (except 2127 * for CTS changes when SOFT_CTS_OFLOW is configured) since this is 2128 * simplest and best. 2129 */ 2130 2131 /* 2132 * set modem change option register 1 2133 * generate modem interrupts on which 1 -> 0 input transitions 2134 * also controls auto-DTR output flow-control, which we don't use 2135 */ 2136 opt = CD1400_MCOR1_CDzd; 2137#ifdef SOFT_CTS_OFLOW 2138 if (cflag & CCTS_OFLOW) 2139 opt |= CD1400_MCOR1_CTSzd; 2140#endif 2141 cd_setreg(com, CD1400_MCOR1, opt); 2142 2143 /* 2144 * set modem change option register 2 2145 * generate modem interrupts on specific 0 -> 1 input transitions 2146 */ 2147 opt = CD1400_MCOR2_CDod; 2148#ifdef SOFT_CTS_OFLOW 2149 if (cflag & CCTS_OFLOW) 2150 opt |= CD1400_MCOR2_CTSod; 2151#endif 2152 cd_setreg(com, CD1400_MCOR2, opt); 2153 2154 /* 2155 * XXX should have done this long ago, but there is too much state 2156 * to change all atomically. 2157 */ 2158 intrsave = save_intr(); 2159 disable_intr(); 2160 COM_LOCK(); 2161 2162 com->state &= ~CS_TTGO; 2163 if (!(tp->t_state & TS_TTSTOP)) 2164 com->state |= CS_TTGO; 2165 if (cflag & CRTS_IFLOW) { 2166 com->state |= CS_RTS_IFLOW; 2167 /* 2168 * If CS_RTS_IFLOW just changed from off to on, the change 2169 * needs to be propagated to MCR_RTS. This isn't urgent, 2170 * so do it later by calling comstart() instead of repeating 2171 * a lot of code from comstart() here. 2172 */ 2173 } else if (com->state & CS_RTS_IFLOW) { 2174 com->state &= ~CS_RTS_IFLOW; 2175 /* 2176 * CS_RTS_IFLOW just changed from on to off. Force MCR_RTS 2177 * on here, since comstart() won't do it later. 2178 */ 2179#if 0 2180 outb(com->modem_ctl_port, com->mcr_image |= MCR_RTS); 2181#else 2182 cd_setreg(com, com->mcr_rts_reg, 2183 com->mcr_image |= com->mcr_rts); 2184#endif 2185 } 2186 2187 /* 2188 * Set up state to handle output flow control. 2189 * XXX - worth handling MDMBUF (DCD) flow control at the lowest level? 2190 * Now has 10+ msec latency, while CTS flow has 50- usec latency. 2191 */ 2192 com->state |= CS_ODEVREADY; 2193#ifdef SOFT_CTS_OFLOW 2194 com->state &= ~CS_CTS_OFLOW; 2195 if (cflag & CCTS_OFLOW) { 2196 com->state |= CS_CTS_OFLOW; 2197 if (!(com->last_modem_status & MSR_CTS)) 2198 com->state &= ~CS_ODEVREADY; 2199 } 2200#endif 2201 /* XXX shouldn't call functions while intrs are disabled. */ 2202 disc_optim(tp, t, com); 2203#if 0 2204 /* 2205 * Recover from fiddling with CS_TTGO. We used to call siointr1() 2206 * unconditionally, but that defeated the careful discarding of 2207 * stale input in sioopen(). 2208 */ 2209 if (com->state >= (CS_BUSY | CS_TTGO)) 2210 siointr1(com); 2211#endif 2212 if (com->state >= (CS_BUSY | CS_TTGO | CS_ODEVREADY)) { 2213 if (!(com->intr_enable & CD1400_SRER_TXRDY)) 2214 cd_setreg(com, CD1400_SRER, 2215 com->intr_enable 2216 = (com->intr_enable & ~CD1400_SRER_TXMPTY) 2217 | CD1400_SRER_TXRDY); 2218 } else { 2219 if (com->intr_enable & CD1400_SRER_TXRDY) 2220 cd_setreg(com, CD1400_SRER, 2221 com->intr_enable 2222 = (com->intr_enable & ~CD1400_SRER_TXRDY) 2223 | CD1400_SRER_TXMPTY); 2224 } 2225 2226 COM_UNLOCK(); 2227 restore_intr(intrsave); 2228 splx(s); 2229 comstart(tp); 2230 if (com->ibufold != NULL) { 2231 free(com->ibufold, M_DEVBUF); 2232 com->ibufold = NULL; 2233 } 2234 return (0); 2235} 2236 2237static int 2238siosetwater(com, speed) 2239 struct com_s *com; 2240 speed_t speed; 2241{ 2242 int cp4ticks; 2243 u_char *ibuf; 2244 int ibufsize; 2245 struct tty *tp; 2246 int intrsave; 2247 2248 /* 2249 * Make the buffer size large enough to handle a softtty interrupt 2250 * latency of about 2 ticks without loss of throughput or data 2251 * (about 3 ticks if input flow control is not used or not honoured, 2252 * but a bit less for CS5-CS7 modes). 2253 */ 2254 cp4ticks = speed / 10 / hz * 4; 2255 for (ibufsize = 128; ibufsize < cp4ticks;) 2256 ibufsize <<= 1; 2257 if (ibufsize == com->ibufsize) { 2258 return (0); 2259 } 2260 2261 /* 2262 * Allocate input buffer. The extra factor of 2 in the size is 2263 * to allow for an error byte for each input byte. 2264 */ 2265 ibuf = malloc(2 * ibufsize, M_DEVBUF, M_NOWAIT); 2266 if (ibuf == NULL) { 2267 return (ENOMEM); 2268 } 2269 2270 /* Initialize non-critical variables. */ 2271 com->ibufold = com->ibuf; 2272 com->ibufsize = ibufsize; 2273 tp = com->tp; 2274 if (tp != NULL) { 2275 tp->t_ififosize = 2 * ibufsize; 2276 tp->t_ispeedwat = (speed_t)-1; 2277 tp->t_ospeedwat = (speed_t)-1; 2278 } 2279 2280 /* 2281 * Read current input buffer, if any. Continue with interrupts 2282 * disabled. 2283 */ 2284 intrsave = save_intr(); 2285 disable_intr(); 2286 COM_LOCK(); 2287 if (com->iptr != com->ibuf) 2288 sioinput(com); 2289 2290 /*- 2291 * Initialize critical variables, including input buffer watermarks. 2292 * The external device is asked to stop sending when the buffer 2293 * exactly reaches high water, or when the high level requests it. 2294 * The high level is notified immediately (rather than at a later 2295 * clock tick) when this watermark is reached. 2296 * The buffer size is chosen so the watermark should almost never 2297 * be reached. 2298 * The low watermark is invisibly 0 since the buffer is always 2299 * emptied all at once. 2300 */ 2301 com->iptr = com->ibuf = ibuf; 2302 com->ibufend = ibuf + ibufsize; 2303 com->ierroff = ibufsize; 2304 com->ihighwater = ibuf + 3 * ibufsize / 4; 2305 2306 COM_UNLOCK(); 2307 restore_intr(intrsave); 2308 return (0); 2309} 2310 2311static void 2312comstart(tp) 2313 struct tty *tp; 2314{ 2315 struct com_s *com; 2316 int s; 2317#ifdef CyDebug 2318 bool_t started; 2319#endif 2320 int unit; 2321 int intrsave; 2322 2323 unit = DEV_TO_UNIT(tp->t_dev); 2324 com = com_addr(unit); 2325 s = spltty(); 2326 2327#ifdef CyDebug 2328 ++com->start_count; 2329 started = FALSE; 2330#endif 2331 2332 intrsave = save_intr(); 2333 disable_intr(); 2334 COM_LOCK(); 2335 if (tp->t_state & TS_TTSTOP) { 2336 com->state &= ~CS_TTGO; 2337 if (com->intr_enable & CD1400_SRER_TXRDY) 2338 cd_setreg(com, CD1400_SRER, 2339 com->intr_enable 2340 = (com->intr_enable & ~CD1400_SRER_TXRDY) 2341 | CD1400_SRER_TXMPTY); 2342 } else { 2343 com->state |= CS_TTGO; 2344 if (com->state >= (CS_BUSY | CS_TTGO | CS_ODEVREADY) 2345 && !(com->intr_enable & CD1400_SRER_TXRDY)) 2346 cd_setreg(com, CD1400_SRER, 2347 com->intr_enable 2348 = (com->intr_enable & ~CD1400_SRER_TXMPTY) 2349 | CD1400_SRER_TXRDY); 2350 } 2351 if (tp->t_state & TS_TBLOCK) { 2352 if (com->mcr_image & com->mcr_rts && com->state & CS_RTS_IFLOW) 2353#if 0 2354 outb(com->modem_ctl_port, com->mcr_image &= ~MCR_RTS); 2355#else 2356 cd_setreg(com, com->mcr_rts_reg, 2357 com->mcr_image &= ~com->mcr_rts); 2358#endif 2359 } else { 2360 if (!(com->mcr_image & com->mcr_rts) 2361 && com->iptr < com->ihighwater 2362 && com->state & CS_RTS_IFLOW) 2363#if 0 2364 outb(com->modem_ctl_port, com->mcr_image |= MCR_RTS); 2365#else 2366 cd_setreg(com, com->mcr_rts_reg, 2367 com->mcr_image |= com->mcr_rts); 2368#endif 2369 } 2370 COM_UNLOCK(); 2371 restore_intr(intrsave); 2372 if (tp->t_state & (TS_TIMEOUT | TS_TTSTOP)) { 2373 ttwwakeup(tp); 2374 splx(s); 2375 return; 2376 } 2377 if (tp->t_outq.c_cc != 0) { 2378 struct lbq *qp; 2379 struct lbq *next; 2380 2381 if (!com->obufs[0].l_queued) { 2382#ifdef CyDebug 2383 started = TRUE; 2384#endif 2385 com->obufs[0].l_tail 2386 = com->obuf1 + q_to_b(&tp->t_outq, com->obuf1, 2387 sizeof com->obuf1); 2388 com->obufs[0].l_next = NULL; 2389 com->obufs[0].l_queued = TRUE; 2390 intrsave = save_intr(); 2391 disable_intr(); 2392 COM_LOCK(); 2393 if (com->state & CS_BUSY) { 2394 qp = com->obufq.l_next; 2395 while ((next = qp->l_next) != NULL) 2396 qp = next; 2397 qp->l_next = &com->obufs[0]; 2398 } else { 2399 com->obufq.l_head = com->obufs[0].l_head; 2400 com->obufq.l_tail = com->obufs[0].l_tail; 2401 com->obufq.l_next = &com->obufs[0]; 2402 com->state |= CS_BUSY; 2403 if (com->state >= (CS_BUSY | CS_TTGO 2404 | CS_ODEVREADY)) 2405 cd_setreg(com, CD1400_SRER, 2406 com->intr_enable 2407 = (com->intr_enable 2408 & ~CD1400_SRER_TXMPTY) 2409 | CD1400_SRER_TXRDY); 2410 } 2411 COM_UNLOCK(); 2412 restore_intr(intrsave); 2413 } 2414 if (tp->t_outq.c_cc != 0 && !com->obufs[1].l_queued) { 2415#ifdef CyDebug 2416 started = TRUE; 2417#endif 2418 com->obufs[1].l_tail 2419 = com->obuf2 + q_to_b(&tp->t_outq, com->obuf2, 2420 sizeof com->obuf2); 2421 com->obufs[1].l_next = NULL; 2422 com->obufs[1].l_queued = TRUE; 2423 intrsave = save_intr(); 2424 disable_intr(); 2425 COM_LOCK(); 2426 if (com->state & CS_BUSY) { 2427 qp = com->obufq.l_next; 2428 while ((next = qp->l_next) != NULL) 2429 qp = next; 2430 qp->l_next = &com->obufs[1]; 2431 } else { 2432 com->obufq.l_head = com->obufs[1].l_head; 2433 com->obufq.l_tail = com->obufs[1].l_tail; 2434 com->obufq.l_next = &com->obufs[1]; 2435 com->state |= CS_BUSY; 2436 if (com->state >= (CS_BUSY | CS_TTGO 2437 | CS_ODEVREADY)) 2438 cd_setreg(com, CD1400_SRER, 2439 com->intr_enable 2440 = (com->intr_enable 2441 & ~CD1400_SRER_TXMPTY) 2442 | CD1400_SRER_TXRDY); 2443 } 2444 COM_UNLOCK(); 2445 restore_intr(intrsave); 2446 } 2447 tp->t_state |= TS_BUSY; 2448 } 2449#ifdef CyDebug 2450 if (started) 2451 ++com->start_real; 2452#endif 2453#if 0 2454 intrsave = save_intr(); 2455 disable_intr(); 2456 COM_LOCK(); 2457 if (com->state >= (CS_BUSY | CS_TTGO)) 2458 siointr1(com); /* fake interrupt to start output */ 2459 COM_UNLOCK(); 2460 restore_intr(intrsave); 2461#endif 2462 ttwwakeup(tp); 2463 splx(s); 2464} 2465 2466static void 2467comstop(tp, rw) 2468 struct tty *tp; 2469 int rw; 2470{ 2471 struct com_s *com; 2472 bool_t wakeup_etc; 2473 int intrsave; 2474 2475 com = com_addr(DEV_TO_UNIT(tp->t_dev)); 2476 wakeup_etc = FALSE; 2477 intrsave = save_intr(); 2478 disable_intr(); 2479 COM_LOCK(); 2480 if (rw & FWRITE) { 2481 com->obufs[0].l_queued = FALSE; 2482 com->obufs[1].l_queued = FALSE; 2483 if (com->extra_state & CSE_ODONE) { 2484 com_events -= LOTS_OF_EVENTS; 2485 com->extra_state &= ~CSE_ODONE; 2486 if (com->etc != ETC_NONE) { 2487 if (com->etc == ETC_BREAK_ENDED) 2488 com->etc = ETC_NONE; 2489 wakeup_etc = TRUE; 2490 } 2491 } 2492 com->tp->t_state &= ~TS_BUSY; 2493 if (com->state & CS_ODONE) 2494 com_events -= LOTS_OF_EVENTS; 2495 com->state &= ~(CS_ODONE | CS_BUSY); 2496 } 2497 if (rw & FREAD) { 2498 /* XXX no way to reset only input fifo. */ 2499 com_events -= (com->iptr - com->ibuf); 2500 com->iptr = com->ibuf; 2501 } 2502 COM_UNLOCK(); 2503 restore_intr(intrsave); 2504 if (wakeup_etc) 2505 wakeup(&com->etc); 2506 if (rw & FWRITE && com->etc == ETC_NONE) 2507 cd1400_channel_cmd(com, CD1400_CCR_CMDRESET | CD1400_CCR_FTF); 2508 comstart(tp); 2509} 2510 2511static int 2512commctl(com, bits, how) 2513 struct com_s *com; 2514 int bits; 2515 int how; 2516{ 2517 int mcr; 2518 int msr; 2519 int intrsave; 2520 2521 if (how == DMGET) { 2522 if (com->channel_control & CD1400_CCR_RCVEN) 2523 bits |= TIOCM_LE; 2524 mcr = com->mcr_image; 2525 if (mcr & com->mcr_dtr) 2526 bits |= TIOCM_DTR; 2527 if (mcr & com->mcr_rts) 2528 /* XXX wired on for Cyclom-8Ys */ 2529 bits |= TIOCM_RTS; 2530 2531 /* 2532 * We must read the modem status from the hardware because 2533 * we don't generate modem status change interrupts for all 2534 * changes, so com->prev_modem_status is not guaranteed to 2535 * be up to date. This is safe, unlike for sio, because 2536 * reading the status register doesn't clear pending modem 2537 * status change interrupts. 2538 */ 2539 msr = cd_getreg(com, CD1400_MSVR2); 2540 2541 if (msr & MSR_CTS) 2542 bits |= TIOCM_CTS; 2543 if (msr & MSR_DCD) 2544 bits |= TIOCM_CD; 2545 if (msr & MSR_DSR) 2546 bits |= TIOCM_DSR; 2547 if (msr & MSR_RI) 2548 /* XXX not connected except for Cyclom-16Y? */ 2549 bits |= TIOCM_RI; 2550 return (bits); 2551 } 2552 mcr = 0; 2553 if (bits & TIOCM_DTR) 2554 mcr |= com->mcr_dtr; 2555 if (bits & TIOCM_RTS) 2556 mcr |= com->mcr_rts; 2557 intrsave = save_intr(); 2558 disable_intr(); 2559 COM_LOCK(); 2560 switch (how) { 2561 case DMSET: 2562 com->mcr_image = mcr; 2563 cd_setreg(com, CD1400_MSVR1, mcr); 2564 cd_setreg(com, CD1400_MSVR2, mcr); 2565 break; 2566 case DMBIS: 2567 com->mcr_image = mcr = com->mcr_image | mcr; 2568 cd_setreg(com, CD1400_MSVR1, mcr); 2569 cd_setreg(com, CD1400_MSVR2, mcr); 2570 break; 2571 case DMBIC: 2572 com->mcr_image = mcr = com->mcr_image & ~mcr; 2573 cd_setreg(com, CD1400_MSVR1, mcr); 2574 cd_setreg(com, CD1400_MSVR2, mcr); 2575 break; 2576 } 2577 COM_UNLOCK(); 2578 restore_intr(intrsave); 2579 return (0); 2580} 2581 2582static void 2583siosettimeout() 2584{ 2585 struct com_s *com; 2586 bool_t someopen; 2587 int unit; 2588 2589 /* 2590 * Set our timeout period to 1 second if no polled devices are open. 2591 * Otherwise set it to max(1/200, 1/hz). 2592 * Enable timeouts iff some device is open. 2593 */ 2594 untimeout(comwakeup, (void *)NULL, sio_timeout_handle); 2595 sio_timeout = hz; 2596 someopen = FALSE; 2597 for (unit = 0; unit < NSIO; ++unit) { 2598 com = com_addr(unit); 2599 if (com != NULL && com->tp != NULL 2600 && com->tp->t_state & TS_ISOPEN) { 2601 someopen = TRUE; 2602#if 0 2603 if (com->poll || com->poll_output) { 2604 sio_timeout = hz > 200 ? hz / 200 : 1; 2605 break; 2606 } 2607#endif 2608 } 2609 } 2610 if (someopen) { 2611 sio_timeouts_until_log = hz / sio_timeout; 2612 sio_timeout_handle = timeout(comwakeup, (void *)NULL, 2613 sio_timeout); 2614 } else { 2615 /* Flush error messages, if any. */ 2616 sio_timeouts_until_log = 1; 2617 comwakeup((void *)NULL); 2618 untimeout(comwakeup, (void *)NULL, sio_timeout_handle); 2619 } 2620} 2621 2622static void 2623comwakeup(chan) 2624 void *chan; 2625{ 2626 struct com_s *com; 2627 int unit; 2628 2629 sio_timeout_handle = timeout(comwakeup, (void *)NULL, sio_timeout); 2630 2631#if 0 2632 /* 2633 * Recover from lost output interrupts. 2634 * Poll any lines that don't use interrupts. 2635 */ 2636 for (unit = 0; unit < NSIO; ++unit) { 2637 com = com_addr(unit); 2638 if (com != NULL 2639 && (com->state >= (CS_BUSY | CS_TTGO) || com->poll)) { 2640 int intrsave; 2641 2642 intrsave = save_intr(); 2643 disable_intr(); 2644 COM_LOCK(); 2645 siointr1(com); 2646 COM_UNLOCK(); 2647 restore_intr(intrsave); 2648 } 2649 } 2650#endif 2651 2652 /* 2653 * Check for and log errors, but not too often. 2654 */ 2655 if (--sio_timeouts_until_log > 0) 2656 return; 2657 sio_timeouts_until_log = hz / sio_timeout; 2658 for (unit = 0; unit < NSIO; ++unit) { 2659 int errnum; 2660 2661 com = com_addr(unit); 2662 if (com == NULL) 2663 continue; 2664 for (errnum = 0; errnum < CE_NTYPES; ++errnum) { 2665 u_int delta; 2666 u_long total; 2667 int intrsave; 2668 2669 intrsave = save_intr(); 2670 disable_intr(); 2671 COM_LOCK(); 2672 delta = com->delta_error_counts[errnum]; 2673 com->delta_error_counts[errnum] = 0; 2674 COM_UNLOCK(); 2675 restore_intr(intrsave); 2676 if (delta == 0) 2677 continue; 2678 total = com->error_counts[errnum] += delta; 2679 log(LOG_ERR, "cy%d: %u more %s%s (total %lu)\n", 2680 unit, delta, error_desc[errnum], 2681 delta == 1 ? "" : "s", total); 2682 } 2683 } 2684} 2685 2686static void 2687disc_optim(tp, t, com) 2688 struct tty *tp; 2689 struct termios *t; 2690 struct com_s *com; 2691{ 2692#ifndef SOFT_HOTCHAR 2693 u_char opt; 2694#endif 2695 2696 /* 2697 * XXX can skip a lot more cases if Smarts. Maybe 2698 * (IGNCR | ISTRIP | IXON) in c_iflag. But perhaps we 2699 * shouldn't skip if (TS_CNTTB | TS_LNCH) is set in t_state. 2700 */ 2701 if (!(t->c_iflag & (ICRNL | IGNCR | IMAXBEL | INLCR | ISTRIP | IXON)) 2702 && (!(t->c_iflag & BRKINT) || (t->c_iflag & IGNBRK)) 2703 && (!(t->c_iflag & PARMRK) 2704 || (t->c_iflag & (IGNPAR | IGNBRK)) == (IGNPAR | IGNBRK)) 2705 && !(t->c_lflag & (ECHO | ICANON | IEXTEN | ISIG | PENDIN)) 2706 && linesw[tp->t_line].l_rint == ttyinput) 2707 tp->t_state |= TS_CAN_BYPASS_L_RINT; 2708 else 2709 tp->t_state &= ~TS_CAN_BYPASS_L_RINT; 2710 com->hotchar = linesw[tp->t_line].l_hotchar; 2711#ifndef SOFT_HOTCHAR 2712 opt = com->cor[2] & ~CD1400_COR3_SCD34; 2713 if (com->hotchar != 0) { 2714 cd_setreg(com, CD1400_SCHR3, com->hotchar); 2715 cd_setreg(com, CD1400_SCHR4, com->hotchar); 2716 opt |= CD1400_COR3_SCD34; 2717 } 2718 if (opt != com->cor[2]) { 2719 cd_setreg(com, CD1400_COR3, com->cor[2] = opt); 2720 cd1400_channel_cmd(com, CD1400_CCR_CMDCORCHG | CD1400_CCR_COR3); 2721 } 2722#endif 2723} 2724 2725#ifdef Smarts 2726/* standard line discipline input routine */ 2727int 2728cyinput(c, tp) 2729 int c; 2730 struct tty *tp; 2731{ 2732 /* XXX duplicate ttyinput(), but without the IXOFF/IXON/ISTRIP/IPARMRK 2733 * bits, as they are done by the CD1400. Hardly worth the effort, 2734 * given that high-throughput sessions are raw anyhow. 2735 */ 2736} 2737#endif /* Smarts */ 2738 2739static int 2740comspeed(speed, cy_clock, prescaler_io) 2741 speed_t speed; 2742 u_long cy_clock; 2743 int *prescaler_io; 2744{ 2745 int actual; 2746 int error; 2747 int divider; 2748 int prescaler; 2749 int prescaler_unit; 2750 2751 if (speed == 0) 2752 return (0); 2753 if (speed < 0 || speed > 150000) 2754 return (-1); 2755 2756 /* determine which prescaler to use */ 2757 for (prescaler_unit = 4, prescaler = 2048; prescaler_unit; 2758 prescaler_unit--, prescaler >>= 2) { 2759 if (cy_clock / prescaler / speed > 63) 2760 break; 2761 } 2762 2763 divider = (cy_clock / prescaler * 2 / speed + 1) / 2; /* round off */ 2764 if (divider > 255) 2765 divider = 255; 2766 actual = cy_clock/prescaler/divider; 2767 2768 /* 10 times error in percent: */ 2769 error = ((actual - (long)speed) * 2000 / (long)speed + 1) / 2; 2770 2771 /* 3.0% max error tolerance */ 2772 if (error < -30 || error > 30) 2773 return (-1); 2774 2775#if 0 2776 printf("prescaler = %d (%d)\n", prescaler, prescaler_unit); 2777 printf("divider = %d (%x)\n", divider, divider); 2778 printf("actual = %d\n", actual); 2779 printf("error = %d\n", error); 2780#endif 2781 2782 *prescaler_io = prescaler_unit; 2783 return (divider); 2784} 2785 2786static void 2787cd1400_channel_cmd(com, cmd) 2788 struct com_s *com; 2789 int cmd; 2790{ 2791 cd1400_channel_cmd_wait(com); 2792 cd_setreg(com, CD1400_CCR, cmd); 2793 cd1400_channel_cmd_wait(com); 2794} 2795 2796static void 2797cd1400_channel_cmd_wait(com) 2798 struct com_s *com; 2799{ 2800 struct timeval start; 2801 struct timeval tv; 2802 long usec; 2803 2804 if (cd_getreg(com, CD1400_CCR) == 0) 2805 return; 2806 microtime(&start); 2807 for (;;) { 2808 if (cd_getreg(com, CD1400_CCR) == 0) 2809 return; 2810 microtime(&tv); 2811 usec = 1000000 * (tv.tv_sec - start.tv_sec) + 2812 tv.tv_usec - start.tv_usec; 2813 if (usec >= 5000) { 2814 log(LOG_ERR, 2815 "cy%d: channel command timeout (%ld usec)\n", 2816 com->unit, usec); 2817 return; 2818 } 2819 } 2820} 2821 2822static void 2823cd_etc(com, etc) 2824 struct com_s *com; 2825 int etc; 2826{ 2827 int intrsave; 2828 2829 /* 2830 * We can't change the hardware's ETC state while there are any 2831 * characters in the tx fifo, since those characters would be 2832 * interpreted as commands! Unputting characters from the fifo 2833 * is difficult, so we wait up to 12 character times for the fifo 2834 * to drain. The command will be delayed for up to 2 character 2835 * times for the tx to become empty. Unputting characters from 2836 * the tx holding and shift registers is impossible, so we wait 2837 * for the tx to become empty so that the command is sure to be 2838 * executed soon after we issue it. 2839 */ 2840 intrsave = save_intr(); 2841 disable_intr(); 2842 COM_LOCK(); 2843 if (com->etc == etc) 2844 goto wait; 2845 if ((etc == CD1400_ETC_SENDBREAK 2846 && (com->etc == ETC_BREAK_STARTING 2847 || com->etc == ETC_BREAK_STARTED)) 2848 || (etc == CD1400_ETC_STOPBREAK 2849 && (com->etc == ETC_BREAK_ENDING || com->etc == ETC_BREAK_ENDED 2850 || com->etc == ETC_NONE))) { 2851 COM_UNLOCK(); 2852 restore_intr(intrsave); 2853 return; 2854 } 2855 com->etc = etc; 2856 cd_setreg(com, CD1400_SRER, 2857 com->intr_enable 2858 = (com->intr_enable & ~CD1400_SRER_TXRDY) | CD1400_SRER_TXMPTY); 2859wait: 2860 COM_UNLOCK(); 2861 restore_intr(intrsave); 2862 while (com->etc == etc 2863 && tsleep(&com->etc, TTIPRI | PCATCH, "cyetc", 0) == 0) 2864 continue; 2865} 2866 2867static int 2868cd_getreg(com, reg) 2869 struct com_s *com; 2870 int reg; 2871{ 2872 struct com_s *basecom; 2873 u_char car; 2874 int cy_align; 2875 int intrsave; 2876 cy_addr iobase; 2877 int val; 2878 2879 basecom = com_addr(com->unit & ~(CD1400_NO_OF_CHANNELS - 1)); 2880 car = com->unit & CD1400_CAR_CHAN; 2881 cy_align = com->cy_align; 2882 iobase = com->iobase; 2883 intrsave = save_intr(); 2884 disable_intr(); 2885 if (intrsave & PSL_I) 2886 COM_LOCK(); 2887 if (basecom->car != car) 2888 cd_outb(iobase, CD1400_CAR, cy_align, basecom->car = car); 2889 val = cd_inb(iobase, reg, cy_align); 2890 if (intrsave & PSL_I) 2891 COM_UNLOCK(); 2892 restore_intr(intrsave); 2893 return (val); 2894} 2895 2896static void 2897cd_setreg(com, reg, val) 2898 struct com_s *com; 2899 int reg; 2900 int val; 2901{ 2902 struct com_s *basecom; 2903 u_char car; 2904 int cy_align; 2905 int intrsave; 2906 cy_addr iobase; 2907 2908 basecom = com_addr(com->unit & ~(CD1400_NO_OF_CHANNELS - 1)); 2909 car = com->unit & CD1400_CAR_CHAN; 2910 cy_align = com->cy_align; 2911 iobase = com->iobase; 2912 intrsave = save_intr(); 2913 disable_intr(); 2914 if (intrsave & PSL_I) 2915 COM_LOCK(); 2916 if (basecom->car != car) 2917 cd_outb(iobase, CD1400_CAR, cy_align, basecom->car = car); 2918 cd_outb(iobase, reg, cy_align, val); 2919 if (intrsave & PSL_I) 2920 COM_UNLOCK(); 2921 restore_intr(intrsave); 2922} 2923 2924#ifdef CyDebug 2925/* useful in ddb */ 2926void 2927cystatus(unit) 2928 int unit; 2929{ 2930 struct com_s *com; 2931 cy_addr iobase; 2932 u_int ocount; 2933 struct tty *tp; 2934 2935 com = com_addr(unit); 2936 printf("info for channel %d\n", unit); 2937 printf("------------------\n"); 2938 printf("total cyclom service probes:\t%d\n", cy_svrr_probes); 2939 printf("calls to upper layer:\t\t%d\n", cy_timeouts); 2940 if (com == NULL) 2941 return; 2942 iobase = com->iobase; 2943 printf("\n"); 2944 printf("cd1400 base address:\\tt%p\n", iobase); 2945 printf("saved channel_control:\t\t0x%02x\n", com->channel_control); 2946 printf("saved cor1-3:\t\t\t0x%02x 0x%02x 0x%02x\n", 2947 com->cor[0], com->cor[1], com->cor[2]); 2948 printf("service request enable reg:\t0x%02x (0x%02x cached)\n", 2949 cd_getreg(com, CD1400_SRER), com->intr_enable); 2950 printf("service request register:\t0x%02x\n", 2951 cd_inb(iobase, CD1400_SVRR, com->cy_align)); 2952 printf("modem status:\t\t\t0x%02x (0x%02x cached)\n", 2953 cd_getreg(com, CD1400_MSVR2), com->prev_modem_status); 2954 printf("rx/tx/mdm interrupt registers:\t0x%02x 0x%02x 0x%02x\n", 2955 cd_inb(iobase, CD1400_RIR, com->cy_align), 2956 cd_inb(iobase, CD1400_TIR, com->cy_align), 2957 cd_inb(iobase, CD1400_MIR, com->cy_align)); 2958 printf("\n"); 2959 printf("com state:\t\t\t0x%02x\n", com->state); 2960 printf("calls to comstart():\t\t%d (%d useful)\n", 2961 com->start_count, com->start_real); 2962 printf("rx buffer chars free:\t\t%d\n", com->iptr - com->ibuf); 2963 ocount = 0; 2964 if (com->obufs[0].l_queued) 2965 ocount += com->obufs[0].l_tail - com->obufs[0].l_head; 2966 if (com->obufs[1].l_queued) 2967 ocount += com->obufs[1].l_tail - com->obufs[1].l_head; 2968 printf("tx buffer chars:\t\t%u\n", ocount); 2969 printf("received chars:\t\t\t%d\n", com->bytes_in); 2970 printf("received exceptions:\t\t%d\n", com->recv_exception); 2971 printf("modem signal deltas:\t\t%d\n", com->mdm); 2972 printf("transmitted chars:\t\t%d\n", com->bytes_out); 2973 printf("\n"); 2974 tp = com->tp; 2975 if (tp != NULL) { 2976 printf("tty state:\t\t\t0x%08x\n", tp->t_state); 2977 printf( 2978 "upper layer queue lengths:\t%d raw, %d canon, %d output\n", 2979 tp->t_rawq.c_cc, tp->t_canq.c_cc, tp->t_outq.c_cc); 2980 } else 2981 printf("tty state:\t\t\tclosed\n"); 2982} 2983#endif /* CyDebug */ 2984