cy_isa.c revision 71846
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_isa.c 71846 2001-01-30 17:05:58Z bde $ 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/conf.h> 74#include <sys/dkstat.h> 75#include <sys/fcntl.h> 76#include <sys/bus.h> 77#include <sys/interrupt.h> 78#include <sys/ipl.h> 79#include <sys/kernel.h> 80#include <sys/malloc.h> 81#include <sys/mutex.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 | M_ZERO); 558 if (com == NULL) 559 break; 560 com->unit = unit; 561 com->gfrcr_image = firmware_version; 562 if (CY_RTS_DTR_SWAPPED(firmware_version)) { 563 com->mcr_dtr = MCR_RTS; 564 com->mcr_rts = MCR_DTR; 565 com->mcr_rts_reg = CD1400_MSVR2; 566 } else { 567 com->mcr_dtr = MCR_DTR; 568 com->mcr_rts = MCR_RTS; 569 com->mcr_rts_reg = CD1400_MSVR1; 570 } 571 com->dtr_wait = 3 * hz; 572 com->obufs[0].l_head = com->obuf1; 573 com->obufs[1].l_head = com->obuf2; 574 575 com->cy_align = cy_align; 576 com->cy_iobase = cy_iobase; 577 com->iobase = iobase; 578 com->car = ~CD1400_CAR_CHAN; 579 580 /* 581 * We don't use all the flags from <sys/ttydefaults.h> since they 582 * are only relevant for logins. It's important to have echo off 583 * initially so that the line doesn't start blathering before the 584 * echo flag can be turned off. 585 */ 586 com->it_in.c_iflag = 0; 587 com->it_in.c_oflag = 0; 588 com->it_in.c_cflag = TTYDEF_CFLAG; 589 com->it_in.c_lflag = 0; 590 if (unit == comconsole) { 591 com->it_in.c_iflag = TTYDEF_IFLAG; 592 com->it_in.c_oflag = TTYDEF_OFLAG; 593 com->it_in.c_cflag = TTYDEF_CFLAG | CLOCAL; 594 com->it_in.c_lflag = TTYDEF_LFLAG; 595 com->lt_out.c_cflag = com->lt_in.c_cflag = CLOCAL; 596 } 597 if (siosetwater(com, com->it_in.c_ispeed) != 0) { 598 free(com, M_DEVBUF); 599 return (0); 600 } 601 termioschars(&com->it_in); 602 com->it_in.c_ispeed = com->it_in.c_ospeed = comdefaultrate; 603 com->it_out = com->it_in; 604 605 s = spltty(); 606 com_addr(unit) = com; 607 splx(s); 608 609 if (sio_ih == NULL) { 610 cdevsw_add(&sio_cdevsw); 611 sio_ih = sinthand_add("tty:sio", &tty_ithd, siopoll, NULL, 612 SWI_TTY, 0); 613 } 614 make_dev(&sio_cdevsw, unit, 615 UID_ROOT, GID_WHEEL, 0600, "ttyc%r%r", adapter, 616 unit % CY_MAX_PORTS); 617 make_dev(&sio_cdevsw, unit | CONTROL_INIT_STATE, 618 UID_ROOT, GID_WHEEL, 0600, "ttyic%r%r", adapter, 619 unit % CY_MAX_PORTS); 620 make_dev(&sio_cdevsw, unit | CONTROL_LOCK_STATE, 621 UID_ROOT, GID_WHEEL, 0600, "ttylc%r%r", adapter, 622 unit % CY_MAX_PORTS); 623 make_dev(&sio_cdevsw, unit | CALLOUT_MASK, 624 UID_UUCP, GID_DIALER, 0660, "cuac%r%r", adapter, 625 unit % CY_MAX_PORTS); 626 make_dev(&sio_cdevsw, unit | CALLOUT_MASK | CONTROL_INIT_STATE, 627 UID_UUCP, GID_DIALER, 0660, "cuaic%r%r", adapter, 628 unit % CY_MAX_PORTS); 629 make_dev(&sio_cdevsw, unit | CALLOUT_MASK | CONTROL_LOCK_STATE, 630 UID_UUCP, GID_DIALER, 0660, "cualc%r%r", adapter, 631 unit % CY_MAX_PORTS); 632 } 633 } 634 635 /* ensure an edge for the next interrupt */ 636 cy_outb(cy_iobase, CY_CLEAR_INTR, cy_align, 0); 637 638 return (adapter); 639} 640 641static int 642sioopen(dev, flag, mode, p) 643 dev_t dev; 644 int flag; 645 int mode; 646 struct proc *p; 647{ 648 struct com_s *com; 649 int error; 650 int mynor; 651 int s; 652 struct tty *tp; 653 int unit; 654 int intrsave; 655 656 mynor = minor(dev); 657 unit = MINOR_TO_UNIT(mynor); 658 if ((u_int) unit >= NSIO || (com = com_addr(unit)) == NULL) 659 return (ENXIO); 660 if (mynor & CONTROL_MASK) 661 return (0); 662#if 0 /* XXX */ 663 tp = com->tp = sio_tty[unit] = ttymalloc(sio_tty[unit]); 664#else 665 tp = com->tp = &sio_tty[unit]; 666#endif 667 dev->si_tty = tp; 668 s = spltty(); 669 /* 670 * We jump to this label after all non-interrupted sleeps to pick 671 * up any changes of the device state. 672 */ 673open_top: 674 while (com->state & CS_DTR_OFF) { 675 error = tsleep(&com->dtr_wait, TTIPRI | PCATCH, "cydtr", 0); 676 if (error != 0) 677 goto out; 678 } 679 if (tp->t_state & TS_ISOPEN) { 680 /* 681 * The device is open, so everything has been initialized. 682 * Handle conflicts. 683 */ 684 if (mynor & CALLOUT_MASK) { 685 if (!com->active_out) { 686 error = EBUSY; 687 goto out; 688 } 689 } else { 690 if (com->active_out) { 691 if (flag & O_NONBLOCK) { 692 error = EBUSY; 693 goto out; 694 } 695 error = tsleep(&com->active_out, 696 TTIPRI | PCATCH, "cybi", 0); 697 if (error != 0) 698 goto out; 699 goto open_top; 700 } 701 } 702 if (tp->t_state & TS_XCLUDE && 703 suser(p)) { 704 error = EBUSY; 705 goto out; 706 } 707 } else { 708 /* 709 * The device isn't open, so there are no conflicts. 710 * Initialize it. Initialization is done twice in many 711 * cases: to preempt sleeping callin opens if we are 712 * callout, and to complete a callin open after DCD rises. 713 */ 714 tp->t_oproc = comstart; 715 tp->t_stop = comstop; 716 tp->t_param = comparam; 717 tp->t_dev = dev; 718 tp->t_termios = mynor & CALLOUT_MASK 719 ? com->it_out : com->it_in; 720 721 /* Encode per-board unit in LIVR for access in intr routines. */ 722 cd_setreg(com, CD1400_LIVR, 723 (unit & CD1400_xIVR_CHAN) << CD1400_xIVR_CHAN_SHIFT); 724 725 (void)commctl(com, TIOCM_DTR | TIOCM_RTS, DMSET); 726#if 0 727 com->poll = com->no_irq; 728 com->poll_output = com->loses_outints; 729#endif 730 ++com->wopeners; 731 error = comparam(tp, &tp->t_termios); 732 --com->wopeners; 733 if (error != 0) 734 goto out; 735#if 0 736 if (com->hasfifo) { 737 /* 738 * (Re)enable and flush fifos. 739 * 740 * Certain SMC chips cause problems if the fifos 741 * are enabled while input is ready. Turn off the 742 * fifo if necessary to clear the input. We test 743 * the input ready bit after enabling the fifos 744 * since we've already enabled them in comparam() 745 * and to handle races between enabling and fresh 746 * input. 747 */ 748 while (TRUE) { 749 outb(iobase + com_fifo, 750 FIFO_RCV_RST | FIFO_XMT_RST 751 | com->fifo_image); 752 DELAY(100); 753 if (!(inb(com->line_status_port) & LSR_RXRDY)) 754 break; 755 outb(iobase + com_fifo, 0); 756 DELAY(100); 757 (void) inb(com->data_port); 758 } 759 } 760 761 intrsave = save_intr(); 762 disable_intr(); 763 COM_LOCK(); 764 (void) inb(com->line_status_port); 765 (void) inb(com->data_port); 766 com->prev_modem_status = com->last_modem_status 767 = inb(com->modem_status_port); 768 outb(iobase + com_ier, IER_ERXRDY | IER_ETXRDY | IER_ERLS 769 | IER_EMSC); 770 COM_UNLOCK(); 771 restore_intr(intrsave); 772#else /* !0 */ 773 /* 774 * Flush fifos. This requires a full channel reset which 775 * also disables the transmitter and receiver. Recover 776 * from this. 777 */ 778 cd1400_channel_cmd(com, 779 CD1400_CCR_CMDRESET | CD1400_CCR_CHANRESET); 780 cd1400_channel_cmd(com, com->channel_control); 781 782 intrsave = save_intr(); 783 disable_intr(); 784 COM_LOCK(); 785 com->prev_modem_status = com->last_modem_status 786 = cd_getreg(com, CD1400_MSVR2); 787 cd_setreg(com, CD1400_SRER, 788 com->intr_enable 789 = CD1400_SRER_MDMCH | CD1400_SRER_RXDATA); 790 COM_UNLOCK(); 791 restore_intr(intrsave); 792#endif /* 0 */ 793 /* 794 * Handle initial DCD. Callout devices get a fake initial 795 * DCD (trapdoor DCD). If we are callout, then any sleeping 796 * callin opens get woken up and resume sleeping on "cybi" 797 * instead of "cydcd". 798 */ 799 /* 800 * XXX `mynor & CALLOUT_MASK' should be 801 * `tp->t_cflag & (SOFT_CARRIER | TRAPDOOR_CARRIER) where 802 * TRAPDOOR_CARRIER is the default initial state for callout 803 * devices and SOFT_CARRIER is like CLOCAL except it hides 804 * the true carrier. 805 */ 806 if (com->prev_modem_status & MSR_DCD || mynor & CALLOUT_MASK) 807 (*linesw[tp->t_line].l_modem)(tp, 1); 808 } 809 /* 810 * Wait for DCD if necessary. 811 */ 812 if (!(tp->t_state & TS_CARR_ON) && !(mynor & CALLOUT_MASK) 813 && !(tp->t_cflag & CLOCAL) && !(flag & O_NONBLOCK)) { 814 ++com->wopeners; 815 error = tsleep(TSA_CARR_ON(tp), TTIPRI | PCATCH, "cydcd", 0); 816 --com->wopeners; 817 if (error != 0) 818 goto out; 819 goto open_top; 820 } 821 error = (*linesw[tp->t_line].l_open)(dev, tp); 822 disc_optim(tp, &tp->t_termios, com); 823 if (tp->t_state & TS_ISOPEN && mynor & CALLOUT_MASK) 824 com->active_out = TRUE; 825 siosettimeout(); 826out: 827 splx(s); 828 if (!(tp->t_state & TS_ISOPEN) && com->wopeners == 0) 829 comhardclose(com); 830 return (error); 831} 832 833static int 834sioclose(dev, flag, mode, p) 835 dev_t dev; 836 int flag; 837 int mode; 838 struct proc *p; 839{ 840 struct com_s *com; 841 int mynor; 842 int s; 843 struct tty *tp; 844 845 mynor = minor(dev); 846 if (mynor & CONTROL_MASK) 847 return (0); 848 com = com_addr(MINOR_TO_UNIT(mynor)); 849 tp = com->tp; 850 s = spltty(); 851 cd_etc(com, CD1400_ETC_STOPBREAK); 852 (*linesw[tp->t_line].l_close)(tp, flag); 853 disc_optim(tp, &tp->t_termios, com); 854 comstop(tp, FREAD | FWRITE); 855 comhardclose(com); 856 ttyclose(tp); 857 siosettimeout(); 858 splx(s); 859#ifdef broken /* session holds a ref to the tty; can't deallocate */ 860 ttyfree(tp); 861 com->tp = sio_tty[unit] = NULL; 862#endif 863 return (0); 864} 865 866static void 867comhardclose(com) 868 struct com_s *com; 869{ 870 cy_addr iobase; 871 int s; 872 struct tty *tp; 873 int unit; 874 int intrsave; 875 876 unit = com->unit; 877 iobase = com->iobase; 878 s = spltty(); 879#if 0 880 com->poll = FALSE; 881 com->poll_output = FALSE; 882#endif 883 com->do_timestamp = 0; 884#if 0 885 outb(iobase + com_cfcr, com->cfcr_image &= ~CFCR_SBREAK); 886#else 887 /* XXX */ 888 intrsave = save_intr(); 889 disable_intr(); 890 COM_LOCK(); 891 com->etc = ETC_NONE; 892 cd_setreg(com, CD1400_COR2, com->cor[1] &= ~CD1400_COR2_ETC); 893 COM_UNLOCK(); 894 restore_intr(intrsave); 895 cd1400_channel_cmd(com, CD1400_CCR_CMDRESET | CD1400_CCR_FTF); 896#endif 897 898 { 899#if 0 900 outb(iobase + com_ier, 0); 901#else 902 intrsave = save_intr(); 903 disable_intr(); 904 COM_LOCK(); 905 cd_setreg(com, CD1400_SRER, com->intr_enable = 0); 906 COM_UNLOCK(); 907 restore_intr(intrsave); 908#endif 909 tp = com->tp; 910 if ((tp->t_cflag & HUPCL) 911 /* 912 * XXX we will miss any carrier drop between here and the 913 * next open. Perhaps we should watch DCD even when the 914 * port is closed; it is not sufficient to check it at 915 * the next open because it might go up and down while 916 * we're not watching. 917 */ 918 || (!com->active_out 919 && !(com->prev_modem_status & MSR_DCD) 920 && !(com->it_in.c_cflag & CLOCAL)) 921 || !(tp->t_state & TS_ISOPEN)) { 922 (void)commctl(com, TIOCM_DTR, DMBIC); 923 924 /* Disable receiver (leave transmitter enabled). */ 925 com->channel_control = CD1400_CCR_CMDCHANCTL 926 | CD1400_CCR_XMTEN 927 | CD1400_CCR_RCVDIS; 928 cd1400_channel_cmd(com, com->channel_control); 929 930 if (com->dtr_wait != 0 && !(com->state & CS_DTR_OFF)) { 931 timeout(siodtrwakeup, com, com->dtr_wait); 932 com->state |= CS_DTR_OFF; 933 } 934 } 935 } 936#if 0 937 if (com->hasfifo) { 938 /* 939 * Disable fifos so that they are off after controlled 940 * reboots. Some BIOSes fail to detect 16550s when the 941 * fifos are enabled. 942 */ 943 outb(iobase + com_fifo, 0); 944 } 945#endif 946 com->active_out = FALSE; 947 wakeup(&com->active_out); 948 wakeup(TSA_CARR_ON(tp)); /* restart any wopeners */ 949 splx(s); 950} 951 952static int 953siowrite(dev, uio, flag) 954 dev_t dev; 955 struct uio *uio; 956 int flag; 957{ 958 int mynor; 959 struct tty *tp; 960 int unit; 961 962 mynor = minor(dev); 963 if (mynor & CONTROL_MASK) 964 return (ENODEV); 965 966 unit = MINOR_TO_UNIT(mynor); 967 tp = com_addr(unit)->tp; 968 /* 969 * (XXX) We disallow virtual consoles if the physical console is 970 * a serial port. This is in case there is a display attached that 971 * is not the console. In that situation we don't need/want the X 972 * server taking over the console. 973 */ 974 if (constty != NULL && unit == comconsole) 975 constty = NULL; 976#ifdef Smarts 977 /* XXX duplicate ttwrite(), but without so much output processing on 978 * CR & LF chars. Hardly worth the effort, given that high-throughput 979 * sessions are raw anyhow. 980 */ 981#else 982 return ((*linesw[tp->t_line].l_write)(tp, uio, flag)); 983#endif 984} 985 986static void 987siodtrwakeup(chan) 988 void *chan; 989{ 990 struct com_s *com; 991 992 com = (struct com_s *)chan; 993 com->state &= ~CS_DTR_OFF; 994 wakeup(&com->dtr_wait); 995} 996 997/* 998 * This function: 999 * a) needs to be called with COM_LOCK() held, and 1000 * b) needs to return with COM_LOCK() held. 1001 */ 1002static void 1003sioinput(com) 1004 struct com_s *com; 1005{ 1006 u_char *buf; 1007 int incc; 1008 u_char line_status; 1009 int recv_data; 1010 struct tty *tp; 1011 int intrsave; 1012 1013 buf = com->ibuf; 1014 tp = com->tp; 1015 if (!(tp->t_state & TS_ISOPEN)) { 1016 com_events -= (com->iptr - com->ibuf); 1017 com->iptr = com->ibuf; 1018 return; 1019 } 1020 if (tp->t_state & TS_CAN_BYPASS_L_RINT) { 1021 /* 1022 * Avoid the grotesquely inefficient lineswitch routine 1023 * (ttyinput) in "raw" mode. It usually takes about 450 1024 * instructions (that's without canonical processing or echo!). 1025 * slinput is reasonably fast (usually 40 instructions plus 1026 * call overhead). 1027 */ 1028 1029 do { 1030 /* 1031 * This may look odd, but it is using save-and-enable 1032 * semantics instead of the save-and-disable semantics 1033 * that are used everywhere else. 1034 */ 1035 intrsave = save_intr(); 1036 COM_UNLOCK(); 1037 enable_intr(); 1038 incc = com->iptr - buf; 1039 if (tp->t_rawq.c_cc + incc > tp->t_ihiwat 1040 && (com->state & CS_RTS_IFLOW 1041 || tp->t_iflag & IXOFF) 1042 && !(tp->t_state & TS_TBLOCK)) 1043 ttyblock(tp); 1044 com->delta_error_counts[CE_TTY_BUF_OVERFLOW] 1045 += b_to_q((char *)buf, incc, &tp->t_rawq); 1046 buf += incc; 1047 tk_nin += incc; 1048 tk_rawcc += incc; 1049 tp->t_rawcc += incc; 1050 ttwakeup(tp); 1051 if (tp->t_state & TS_TTSTOP 1052 && (tp->t_iflag & IXANY 1053 || tp->t_cc[VSTART] == tp->t_cc[VSTOP])) { 1054 tp->t_state &= ~TS_TTSTOP; 1055 tp->t_lflag &= ~FLUSHO; 1056 comstart(tp); 1057 } 1058 restore_intr(intrsave); 1059 COM_LOCK(); 1060 } while (buf < com->iptr); 1061 } else { 1062 do { 1063 /* 1064 * This may look odd, but it is using save-and-enable 1065 * semantics instead of the save-and-disable semantics 1066 * that are used everywhere else. 1067 */ 1068 intrsave = save_intr(); 1069 COM_UNLOCK(); 1070 enable_intr(); 1071 line_status = buf[com->ierroff]; 1072 recv_data = *buf++; 1073 if (line_status 1074 & (LSR_BI | LSR_FE | LSR_OE | LSR_PE)) { 1075 if (line_status & LSR_BI) 1076 recv_data |= TTY_BI; 1077 if (line_status & LSR_FE) 1078 recv_data |= TTY_FE; 1079 if (line_status & LSR_OE) 1080 recv_data |= TTY_OE; 1081 if (line_status & LSR_PE) 1082 recv_data |= TTY_PE; 1083 } 1084 (*linesw[tp->t_line].l_rint)(recv_data, tp); 1085 restore_intr(intrsave); 1086 COM_LOCK(); 1087 } while (buf < com->iptr); 1088 } 1089 com_events -= (com->iptr - com->ibuf); 1090 com->iptr = com->ibuf; 1091 1092 /* 1093 * There is now room for another low-level buffer full of input, 1094 * so enable RTS if it is now disabled and there is room in the 1095 * high-level buffer. 1096 */ 1097 if ((com->state & CS_RTS_IFLOW) && !(com->mcr_image & com->mcr_rts) && 1098 !(tp->t_state & TS_TBLOCK)) 1099#if 0 1100 outb(com->modem_ctl_port, com->mcr_image |= MCR_RTS); 1101#else 1102 cd_setreg(com, com->mcr_rts_reg, 1103 com->mcr_image |= com->mcr_rts); 1104#endif 1105} 1106 1107void 1108siointr(unit) 1109 int unit; 1110{ 1111 int baseu; 1112 int cy_align; 1113 cy_addr cy_iobase; 1114 int cyu; 1115 cy_addr iobase; 1116 u_char status; 1117 1118 COM_LOCK(); /* XXX could this be placed down lower in the loop? */ 1119 1120 baseu = unit * CY_MAX_PORTS; 1121 cy_align = com_addr(baseu)->cy_align; 1122 cy_iobase = com_addr(baseu)->cy_iobase; 1123 1124 /* check each CD1400 in turn */ 1125 for (cyu = 0; cyu < cy_nr_cd1400s[unit]; ++cyu) { 1126 iobase = (cy_addr) (cy_iobase 1127 + (cy_chip_offset[cyu] << cy_align)); 1128 /* poll to see if it has any work */ 1129 status = cd_inb(iobase, CD1400_SVRR, cy_align); 1130 if (status == 0) 1131 continue; 1132#ifdef CyDebug 1133 ++cy_svrr_probes; 1134#endif 1135 /* service requests as appropriate, giving priority to RX */ 1136 if (status & CD1400_SVRR_RXRDY) { 1137 struct com_s *com; 1138 u_int count; 1139 u_char *ioptr; 1140 u_char line_status; 1141 u_char recv_data; 1142 u_char serv_type; 1143#ifdef PollMode 1144 u_char save_rir; 1145#endif 1146 1147#ifdef PollMode 1148 save_rir = cd_inb(iobase, CD1400_RIR, cy_align); 1149 1150 /* enter rx service */ 1151 cd_outb(iobase, CD1400_CAR, cy_align, save_rir); 1152 com_addr(baseu + cyu * CD1400_NO_OF_CHANNELS)->car 1153 = save_rir & CD1400_CAR_CHAN; 1154 1155 serv_type = cd_inb(iobase, CD1400_RIVR, cy_align); 1156 com = com_addr(baseu 1157 + ((serv_type >> CD1400_xIVR_CHAN_SHIFT) 1158 & CD1400_xIVR_CHAN)); 1159#else 1160 /* ack receive service */ 1161 serv_type = cy_inb(iobase, CY8_SVCACKR, cy_align); 1162 1163 com = com_addr(baseu + 1164 + ((serv_type >> CD1400_xIVR_CHAN_SHIFT) 1165 & CD1400_xIVR_CHAN)); 1166#endif 1167 1168 if (serv_type & CD1400_RIVR_EXCEPTION) { 1169 ++com->recv_exception; 1170 line_status = cd_inb(iobase, CD1400_RDSR, cy_align); 1171 /* break/unnattached error bits or real input? */ 1172 recv_data = cd_inb(iobase, CD1400_RDSR, cy_align); 1173#ifndef SOFT_HOTCHAR 1174 if (line_status & CD1400_RDSR_SPECIAL 1175 && com->hotchar != 0) 1176 sched_swi(sio_ih, SWI_NOSWITCH); 1177 1178#endif 1179#if 1 /* XXX "intelligent" PFO error handling would break O error handling */ 1180 if (line_status & (LSR_PE|LSR_FE|LSR_BI)) { 1181 /* 1182 Don't store PE if IGNPAR and BI if IGNBRK, 1183 this hack allows "raw" tty optimization 1184 works even if IGN* is set. 1185 */ 1186 if ( com->tp == NULL 1187 || !(com->tp->t_state & TS_ISOPEN) 1188 || ((line_status & (LSR_PE|LSR_FE)) 1189 && (com->tp->t_iflag & IGNPAR)) 1190 || ((line_status & LSR_BI) 1191 && (com->tp->t_iflag & IGNBRK))) 1192 goto cont; 1193 if ( (line_status & (LSR_PE|LSR_FE)) 1194 && (com->tp->t_state & TS_CAN_BYPASS_L_RINT) 1195 && ((line_status & LSR_FE) 1196 || ((line_status & LSR_PE) 1197 && (com->tp->t_iflag & INPCK)))) 1198 recv_data = 0; 1199 } 1200#endif /* 1 */ 1201 ++com->bytes_in; 1202#ifdef SOFT_HOTCHAR 1203 if (com->hotchar != 0 && recv_data == com->hotchar) 1204 sched_swi(sio_ih, SWI_NOSWITCH); 1205#endif 1206 ioptr = com->iptr; 1207 if (ioptr >= com->ibufend) 1208 CE_RECORD(com, CE_INTERRUPT_BUF_OVERFLOW); 1209 else { 1210 if (com->do_timestamp) 1211 microtime(&com->timestamp); 1212 ++com_events; 1213 ioptr[0] = recv_data; 1214 ioptr[com->ierroff] = line_status; 1215 com->iptr = ++ioptr; 1216 if (ioptr == com->ihighwater 1217 && com->state & CS_RTS_IFLOW) 1218#if 0 1219 outb(com->modem_ctl_port, 1220 com->mcr_image &= ~MCR_RTS); 1221#else 1222 cd_outb(iobase, com->mcr_rts_reg, 1223 cy_align, 1224 com->mcr_image &= 1225 ~com->mcr_rts); 1226#endif 1227 if (line_status & LSR_OE) 1228 CE_RECORD(com, CE_OVERRUN); 1229 } 1230 goto cont; 1231 } else { 1232 int ifree; 1233 1234 count = cd_inb(iobase, CD1400_RDCR, cy_align); 1235 if (!count) 1236 goto cont; 1237 com->bytes_in += count; 1238 ioptr = com->iptr; 1239 ifree = com->ibufend - ioptr; 1240 if (count > ifree) { 1241 count -= ifree; 1242 com_events += ifree; 1243 if (ifree != 0) { 1244 if (com->do_timestamp) 1245 microtime(&com->timestamp); 1246 do { 1247 recv_data = cd_inb(iobase, 1248 CD1400_RDSR, 1249 cy_align); 1250#ifdef SOFT_HOTCHAR 1251 if (com->hotchar != 0 1252 && recv_data 1253 == com->hotchar) 1254 sched_swi(sio_ih, SWI_NOSWITCH); 1255#endif 1256 ioptr[0] = recv_data; 1257 ioptr[com->ierroff] = 0; 1258 ++ioptr; 1259 } while (--ifree != 0); 1260 } 1261 com->delta_error_counts 1262 [CE_INTERRUPT_BUF_OVERFLOW] += count; 1263 do { 1264 recv_data = cd_inb(iobase, CD1400_RDSR, 1265 cy_align); 1266#ifdef SOFT_HOTCHAR 1267 if (com->hotchar != 0 1268 && recv_data == com->hotchar) 1269 sched_swi(sio_ih, SWI_NOSWITCH); 1270#endif 1271 } while (--count != 0); 1272 } else { 1273 if (com->do_timestamp) 1274 microtime(&com->timestamp); 1275 if (ioptr <= com->ihighwater 1276 && ioptr + count > com->ihighwater 1277 && com->state & CS_RTS_IFLOW) 1278#if 0 1279 outb(com->modem_ctl_port, 1280 com->mcr_image &= ~MCR_RTS); 1281#else 1282 cd_outb(iobase, com->mcr_rts_reg, 1283 cy_align, 1284 com->mcr_image 1285 &= ~com->mcr_rts); 1286#endif 1287 com_events += count; 1288 do { 1289 recv_data = cd_inb(iobase, CD1400_RDSR, 1290 cy_align); 1291#ifdef SOFT_HOTCHAR 1292 if (com->hotchar != 0 1293 && recv_data == com->hotchar) 1294 sched_swi(sio_ih, SWI_NOSWITCH); 1295#endif 1296 ioptr[0] = recv_data; 1297 ioptr[com->ierroff] = 0; 1298 ++ioptr; 1299 } while (--count != 0); 1300 } 1301 com->iptr = ioptr; 1302 } 1303cont: 1304 1305 /* terminate service context */ 1306#ifdef PollMode 1307 cd_outb(iobase, CD1400_RIR, cy_align, 1308 save_rir 1309 & ~(CD1400_RIR_RDIREQ | CD1400_RIR_RBUSY)); 1310#else 1311 cd_outb(iobase, CD1400_EOSRR, cy_align, 0); 1312#endif 1313 } 1314 if (status & CD1400_SVRR_MDMCH) { 1315 struct com_s *com; 1316 u_char modem_status; 1317#ifdef PollMode 1318 u_char save_mir; 1319#else 1320 u_char vector; 1321#endif 1322 1323#ifdef PollMode 1324 save_mir = cd_inb(iobase, CD1400_MIR, cy_align); 1325 1326 /* enter modem service */ 1327 cd_outb(iobase, CD1400_CAR, cy_align, save_mir); 1328 com_addr(baseu + cyu * CD1400_NO_OF_CHANNELS)->car 1329 = save_mir & CD1400_CAR_CHAN; 1330 1331 com = com_addr(baseu + cyu * CD1400_NO_OF_CHANNELS 1332 + (save_mir & CD1400_MIR_CHAN)); 1333#else 1334 /* ack modem service */ 1335 vector = cy_inb(iobase, CY8_SVCACKM, cy_align); 1336 1337 com = com_addr(baseu 1338 + ((vector >> CD1400_xIVR_CHAN_SHIFT) 1339 & CD1400_xIVR_CHAN)); 1340#endif 1341 ++com->mdm; 1342 modem_status = cd_inb(iobase, CD1400_MSVR2, cy_align); 1343 if (modem_status != com->last_modem_status) { 1344 if (com->do_dcd_timestamp 1345 && !(com->last_modem_status & MSR_DCD) 1346 && modem_status & MSR_DCD) 1347 microtime(&com->dcd_timestamp); 1348 1349 /* 1350 * Schedule high level to handle DCD changes. Note 1351 * that we don't use the delta bits anywhere. Some 1352 * UARTs mess them up, and it's easy to remember the 1353 * previous bits and calculate the delta. 1354 */ 1355 com->last_modem_status = modem_status; 1356 if (!(com->state & CS_CHECKMSR)) { 1357 com_events += LOTS_OF_EVENTS; 1358 com->state |= CS_CHECKMSR; 1359 sched_swi(sio_ih, SWI_NOSWITCH); 1360 } 1361 1362#ifdef SOFT_CTS_OFLOW 1363 /* handle CTS change immediately for crisp flow ctl */ 1364 if (com->state & CS_CTS_OFLOW) { 1365 if (modem_status & MSR_CTS) { 1366 com->state |= CS_ODEVREADY; 1367 if (com->state >= (CS_BUSY | CS_TTGO 1368 | CS_ODEVREADY) 1369 && !(com->intr_enable 1370 & CD1400_SRER_TXRDY)) 1371 cd_outb(iobase, CD1400_SRER, 1372 cy_align, 1373 com->intr_enable 1374 = com->intr_enable 1375 & ~CD1400_SRER_TXMPTY 1376 | CD1400_SRER_TXRDY); 1377 } else { 1378 com->state &= ~CS_ODEVREADY; 1379 if (com->intr_enable 1380 & CD1400_SRER_TXRDY) 1381 cd_outb(iobase, CD1400_SRER, 1382 cy_align, 1383 com->intr_enable 1384 = com->intr_enable 1385 & ~CD1400_SRER_TXRDY 1386 | CD1400_SRER_TXMPTY); 1387 } 1388 } 1389#endif 1390 } 1391 1392 /* terminate service context */ 1393#ifdef PollMode 1394 cd_outb(iobase, CD1400_MIR, cy_align, 1395 save_mir 1396 & ~(CD1400_MIR_RDIREQ | CD1400_MIR_RBUSY)); 1397#else 1398 cd_outb(iobase, CD1400_EOSRR, cy_align, 0); 1399#endif 1400 } 1401 if (status & CD1400_SVRR_TXRDY) { 1402 struct com_s *com; 1403#ifdef PollMode 1404 u_char save_tir; 1405#else 1406 u_char vector; 1407#endif 1408 1409#ifdef PollMode 1410 save_tir = cd_inb(iobase, CD1400_TIR, cy_align); 1411 1412 /* enter tx service */ 1413 cd_outb(iobase, CD1400_CAR, cy_align, save_tir); 1414 com_addr(baseu + cyu * CD1400_NO_OF_CHANNELS)->car 1415 = save_tir & CD1400_CAR_CHAN; 1416 1417 com = com_addr(baseu 1418 + cyu * CD1400_NO_OF_CHANNELS 1419 + (save_tir & CD1400_TIR_CHAN)); 1420#else 1421 /* ack transmit service */ 1422 vector = cy_inb(iobase, CY8_SVCACKT, cy_align); 1423 1424 com = com_addr(baseu 1425 + ((vector >> CD1400_xIVR_CHAN_SHIFT) 1426 & CD1400_xIVR_CHAN)); 1427#endif 1428 1429 if (com->etc != ETC_NONE) { 1430 if (com->intr_enable & CD1400_SRER_TXRDY) { 1431 /* 1432 * Here due to sloppy SRER_TXRDY 1433 * enabling. Ignore. Come back when 1434 * tx is empty. 1435 */ 1436 cd_outb(iobase, CD1400_SRER, cy_align, 1437 com->intr_enable 1438 = (com->intr_enable 1439 & ~CD1400_SRER_TXRDY) 1440 | CD1400_SRER_TXMPTY); 1441 goto terminate_tx_service; 1442 } 1443 switch (com->etc) { 1444 case CD1400_ETC_SENDBREAK: 1445 case CD1400_ETC_STOPBREAK: 1446 /* 1447 * Start the command. Come back on 1448 * next tx empty interrupt, hopefully 1449 * after command has been executed. 1450 */ 1451 cd_outb(iobase, CD1400_COR2, cy_align, 1452 com->cor[1] |= CD1400_COR2_ETC); 1453 cd_outb(iobase, CD1400_TDR, cy_align, 1454 CD1400_ETC_CMD); 1455 cd_outb(iobase, CD1400_TDR, cy_align, 1456 com->etc); 1457 if (com->etc == CD1400_ETC_SENDBREAK) 1458 com->etc = ETC_BREAK_STARTING; 1459 else 1460 com->etc = ETC_BREAK_ENDING; 1461 goto terminate_tx_service; 1462 case ETC_BREAK_STARTING: 1463 /* 1464 * BREAK is now on. Continue with 1465 * SRER_TXMPTY processing, hopefully 1466 * don't come back. 1467 */ 1468 com->etc = ETC_BREAK_STARTED; 1469 break; 1470 case ETC_BREAK_STARTED: 1471 /* 1472 * Came back due to sloppy SRER_TXMPTY 1473 * enabling. Hope again. 1474 */ 1475 break; 1476 case ETC_BREAK_ENDING: 1477 /* 1478 * BREAK is now off. Continue with 1479 * SRER_TXMPTY processing and don't 1480 * come back. The SWI handler will 1481 * restart tx interrupts if necessary. 1482 */ 1483 cd_outb(iobase, CD1400_COR2, cy_align, 1484 com->cor[1] 1485 &= ~CD1400_COR2_ETC); 1486 com->etc = ETC_BREAK_ENDED; 1487 if (!(com->state & CS_ODONE)) { 1488 com_events += LOTS_OF_EVENTS; 1489 com->state |= CS_ODONE; 1490 sched_swi(sio_ih, SWI_NOSWITCH); 1491 } 1492 break; 1493 case ETC_BREAK_ENDED: 1494 /* 1495 * Shouldn't get here. Hope again. 1496 */ 1497 break; 1498 } 1499 } 1500 if (com->intr_enable & CD1400_SRER_TXMPTY) { 1501 if (!(com->extra_state & CSE_ODONE)) { 1502 com_events += LOTS_OF_EVENTS; 1503 com->extra_state |= CSE_ODONE; 1504 sched_swi(sio_ih, SWI_NOSWITCH); 1505 } 1506 cd_outb(iobase, CD1400_SRER, cy_align, 1507 com->intr_enable 1508 &= ~CD1400_SRER_TXMPTY); 1509 goto terminate_tx_service; 1510 } 1511 if (com->state >= (CS_BUSY | CS_TTGO | CS_ODEVREADY)) { 1512 u_char *ioptr; 1513 u_int ocount; 1514 1515 ioptr = com->obufq.l_head; 1516 ocount = com->obufq.l_tail - ioptr; 1517 if (ocount > CD1400_TX_FIFO_SIZE) 1518 ocount = CD1400_TX_FIFO_SIZE; 1519 com->bytes_out += ocount; 1520 do 1521 cd_outb(iobase, CD1400_TDR, cy_align, 1522 *ioptr++); 1523 while (--ocount != 0); 1524 com->obufq.l_head = ioptr; 1525 if (ioptr >= com->obufq.l_tail) { 1526 struct lbq *qp; 1527 1528 qp = com->obufq.l_next; 1529 qp->l_queued = FALSE; 1530 qp = qp->l_next; 1531 if (qp != NULL) { 1532 com->obufq.l_head = qp->l_head; 1533 com->obufq.l_tail = qp->l_tail; 1534 com->obufq.l_next = qp; 1535 } else { 1536 /* output just completed */ 1537 com->state &= ~CS_BUSY; 1538 1539 /* 1540 * The setting of CSE_ODONE may be 1541 * stale here. We currently only 1542 * use it when CS_BUSY is set, and 1543 * fixing it when we clear CS_BUSY 1544 * is easiest. 1545 */ 1546 if (com->extra_state & CSE_ODONE) { 1547 com_events -= LOTS_OF_EVENTS; 1548 com->extra_state &= ~CSE_ODONE; 1549 } 1550 1551 cd_outb(iobase, CD1400_SRER, cy_align, 1552 com->intr_enable 1553 = (com->intr_enable 1554 & ~CD1400_SRER_TXRDY) 1555 | CD1400_SRER_TXMPTY); 1556 } 1557 if (!(com->state & CS_ODONE)) { 1558 com_events += LOTS_OF_EVENTS; 1559 com->state |= CS_ODONE; 1560 1561 /* handle at high level ASAP */ 1562 sched_swi(sio_ih, SWI_NOSWITCH); 1563 } 1564 } 1565 } 1566 1567 /* terminate service context */ 1568terminate_tx_service: 1569#ifdef PollMode 1570 cd_outb(iobase, CD1400_TIR, cy_align, 1571 save_tir 1572 & ~(CD1400_TIR_RDIREQ | CD1400_TIR_RBUSY)); 1573#else 1574 cd_outb(iobase, CD1400_EOSRR, cy_align, 0); 1575#endif 1576 } 1577 } 1578 1579 /* ensure an edge for the next interrupt */ 1580 cy_outb(cy_iobase, CY_CLEAR_INTR, cy_align, 0); 1581 1582 sched_swi(sio_ih, SWI_NOSWITCH); 1583 1584 COM_UNLOCK(); 1585} 1586 1587#if 0 1588static void 1589siointr1(com) 1590 struct com_s *com; 1591{ 1592} 1593#endif 1594 1595static int 1596sioioctl(dev, cmd, data, flag, p) 1597 dev_t dev; 1598 u_long cmd; 1599 caddr_t data; 1600 int flag; 1601 struct proc *p; 1602{ 1603 struct com_s *com; 1604 int error; 1605 int mynor; 1606 int s; 1607 struct tty *tp; 1608#if defined(COMPAT_43) || defined(COMPAT_SUNOS) 1609 int oldcmd; 1610 struct termios term; 1611#endif 1612 1613 mynor = minor(dev); 1614 com = com_addr(MINOR_TO_UNIT(mynor)); 1615 if (mynor & CONTROL_MASK) { 1616 struct termios *ct; 1617 1618 switch (mynor & CONTROL_MASK) { 1619 case CONTROL_INIT_STATE: 1620 ct = mynor & CALLOUT_MASK ? &com->it_out : &com->it_in; 1621 break; 1622 case CONTROL_LOCK_STATE: 1623 ct = mynor & CALLOUT_MASK ? &com->lt_out : &com->lt_in; 1624 break; 1625 default: 1626 return (ENODEV); /* /dev/nodev */ 1627 } 1628 switch (cmd) { 1629 case TIOCSETA: 1630 error = suser(p); 1631 if (error != 0) 1632 return (error); 1633 *ct = *(struct termios *)data; 1634 return (0); 1635 case TIOCGETA: 1636 *(struct termios *)data = *ct; 1637 return (0); 1638 case TIOCGETD: 1639 *(int *)data = TTYDISC; 1640 return (0); 1641 case TIOCGWINSZ: 1642 bzero(data, sizeof(struct winsize)); 1643 return (0); 1644 default: 1645 return (ENOTTY); 1646 } 1647 } 1648 tp = com->tp; 1649#if defined(COMPAT_43) || defined(COMPAT_SUNOS) 1650 term = tp->t_termios; 1651 oldcmd = cmd; 1652 error = ttsetcompat(tp, &cmd, data, &term); 1653 if (error != 0) 1654 return (error); 1655 if (cmd != oldcmd) 1656 data = (caddr_t)&term; 1657#endif 1658 if (cmd == TIOCSETA || cmd == TIOCSETAW || cmd == TIOCSETAF) { 1659 int cc; 1660 struct termios *dt = (struct termios *)data; 1661 struct termios *lt = mynor & CALLOUT_MASK 1662 ? &com->lt_out : &com->lt_in; 1663 1664 dt->c_iflag = (tp->t_iflag & lt->c_iflag) 1665 | (dt->c_iflag & ~lt->c_iflag); 1666 dt->c_oflag = (tp->t_oflag & lt->c_oflag) 1667 | (dt->c_oflag & ~lt->c_oflag); 1668 dt->c_cflag = (tp->t_cflag & lt->c_cflag) 1669 | (dt->c_cflag & ~lt->c_cflag); 1670 dt->c_lflag = (tp->t_lflag & lt->c_lflag) 1671 | (dt->c_lflag & ~lt->c_lflag); 1672 for (cc = 0; cc < NCCS; ++cc) 1673 if (lt->c_cc[cc] != 0) 1674 dt->c_cc[cc] = tp->t_cc[cc]; 1675 if (lt->c_ispeed != 0) 1676 dt->c_ispeed = tp->t_ispeed; 1677 if (lt->c_ospeed != 0) 1678 dt->c_ospeed = tp->t_ospeed; 1679 } 1680 error = (*linesw[tp->t_line].l_ioctl)(tp, cmd, data, flag, p); 1681 if (error != ENOIOCTL) 1682 return (error); 1683 s = spltty(); 1684 error = ttioctl(tp, cmd, data, flag); 1685 disc_optim(tp, &tp->t_termios, com); 1686 if (error != ENOIOCTL) { 1687 splx(s); 1688 return (error); 1689 } 1690 switch (cmd) { 1691 case TIOCSBRK: 1692#if 0 1693 outb(iobase + com_cfcr, com->cfcr_image |= CFCR_SBREAK); 1694#else 1695 cd_etc(com, CD1400_ETC_SENDBREAK); 1696#endif 1697 break; 1698 case TIOCCBRK: 1699#if 0 1700 outb(iobase + com_cfcr, com->cfcr_image &= ~CFCR_SBREAK); 1701#else 1702 cd_etc(com, CD1400_ETC_STOPBREAK); 1703#endif 1704 break; 1705 case TIOCSDTR: 1706 (void)commctl(com, TIOCM_DTR, DMBIS); 1707 break; 1708 case TIOCCDTR: 1709 (void)commctl(com, TIOCM_DTR, DMBIC); 1710 break; 1711 /* 1712 * XXX should disallow changing MCR_RTS if CS_RTS_IFLOW is set. The 1713 * changes get undone on the next call to comparam(). 1714 */ 1715 case TIOCMSET: 1716 (void)commctl(com, *(int *)data, DMSET); 1717 break; 1718 case TIOCMBIS: 1719 (void)commctl(com, *(int *)data, DMBIS); 1720 break; 1721 case TIOCMBIC: 1722 (void)commctl(com, *(int *)data, DMBIC); 1723 break; 1724 case TIOCMGET: 1725 *(int *)data = commctl(com, 0, DMGET); 1726 break; 1727 case TIOCMSDTRWAIT: 1728 /* must be root since the wait applies to following logins */ 1729 error = suser(p); 1730 if (error != 0) { 1731 splx(s); 1732 return (error); 1733 } 1734 com->dtr_wait = *(int *)data * hz / 100; 1735 break; 1736 case TIOCMGDTRWAIT: 1737 *(int *)data = com->dtr_wait * 100 / hz; 1738 break; 1739 case TIOCTIMESTAMP: 1740 com->do_timestamp = TRUE; 1741 *(struct timeval *)data = com->timestamp; 1742 break; 1743 case TIOCDCDTIMESTAMP: 1744 com->do_dcd_timestamp = TRUE; 1745 *(struct timeval *)data = com->dcd_timestamp; 1746 break; 1747 default: 1748 splx(s); 1749 return (ENOTTY); 1750 } 1751 splx(s); 1752 return (0); 1753} 1754 1755static void 1756siopoll(void *arg) 1757{ 1758 int unit; 1759 int intrsave; 1760 1761#ifdef CyDebug 1762 ++cy_timeouts; 1763#endif 1764 if (com_events == 0) 1765 return; 1766repeat: 1767 for (unit = 0; unit < NSIO; ++unit) { 1768 struct com_s *com; 1769 int incc; 1770 struct tty *tp; 1771 1772 com = com_addr(unit); 1773 if (com == NULL) 1774 continue; 1775 tp = com->tp; 1776 if (tp == NULL) { 1777 /* 1778 * XXX forget any events related to closed devices 1779 * (actually never opened devices) so that we don't 1780 * loop. 1781 */ 1782 intrsave = save_intr(); 1783 disable_intr(); 1784 COM_LOCK(); 1785 incc = com->iptr - com->ibuf; 1786 com->iptr = com->ibuf; 1787 if (com->state & CS_CHECKMSR) { 1788 incc += LOTS_OF_EVENTS; 1789 com->state &= ~CS_CHECKMSR; 1790 } 1791 com_events -= incc; 1792 COM_UNLOCK(); 1793 restore_intr(intrsave); 1794 if (incc != 0) 1795 log(LOG_DEBUG, 1796 "sio%d: %d events for device with no tp\n", 1797 unit, incc); 1798 continue; 1799 } 1800 if (com->iptr != com->ibuf) { 1801 intrsave = save_intr(); 1802 disable_intr(); 1803 COM_LOCK(); 1804 sioinput(com); 1805 COM_UNLOCK(); 1806 restore_intr(intrsave); 1807 } 1808 if (com->state & CS_CHECKMSR) { 1809 u_char delta_modem_status; 1810 1811 intrsave = save_intr(); 1812 disable_intr(); 1813 COM_LOCK(); 1814 sioinput(com); 1815 delta_modem_status = com->last_modem_status 1816 ^ com->prev_modem_status; 1817 com->prev_modem_status = com->last_modem_status; 1818 com_events -= LOTS_OF_EVENTS; 1819 com->state &= ~CS_CHECKMSR; 1820 COM_UNLOCK(); 1821 restore_intr(intrsave); 1822 if (delta_modem_status & MSR_DCD) 1823 (*linesw[tp->t_line].l_modem) 1824 (tp, com->prev_modem_status & MSR_DCD); 1825 } 1826 if (com->extra_state & CSE_ODONE) { 1827 intrsave = save_intr(); 1828 disable_intr(); 1829 COM_LOCK(); 1830 com_events -= LOTS_OF_EVENTS; 1831 com->extra_state &= ~CSE_ODONE; 1832 COM_UNLOCK(); 1833 restore_intr(intrsave); 1834 if (!(com->state & CS_BUSY)) { 1835 tp->t_state &= ~TS_BUSY; 1836 ttwwakeup(com->tp); 1837 } 1838 if (com->etc != ETC_NONE) { 1839 if (com->etc == ETC_BREAK_ENDED) 1840 com->etc = ETC_NONE; 1841 wakeup(&com->etc); 1842 } 1843 } 1844 if (com->state & CS_ODONE) { 1845 intrsave = save_intr(); 1846 disable_intr(); 1847 COM_LOCK(); 1848 com_events -= LOTS_OF_EVENTS; 1849 com->state &= ~CS_ODONE; 1850 COM_UNLOCK(); 1851 restore_intr(intrsave); 1852 (*linesw[tp->t_line].l_start)(tp); 1853 } 1854 if (com_events == 0) 1855 break; 1856 } 1857 if (com_events >= LOTS_OF_EVENTS) 1858 goto repeat; 1859} 1860 1861static int 1862comparam(tp, t) 1863 struct tty *tp; 1864 struct termios *t; 1865{ 1866 int bits; 1867 int cflag; 1868 struct com_s *com; 1869 u_char cor_change; 1870 u_long cy_clock; 1871 int idivisor; 1872 int iflag; 1873 int iprescaler; 1874 int itimeout; 1875 int odivisor; 1876 int oprescaler; 1877 u_char opt; 1878 int s; 1879 int unit; 1880 int intrsave; 1881 1882 /* do historical conversions */ 1883 if (t->c_ispeed == 0) 1884 t->c_ispeed = t->c_ospeed; 1885 1886 unit = DEV_TO_UNIT(tp->t_dev); 1887 com = com_addr(unit); 1888 1889 /* check requested parameters */ 1890 cy_clock = CY_CLOCK(com->gfrcr_image); 1891 idivisor = comspeed(t->c_ispeed, cy_clock, &iprescaler); 1892 if (idivisor < 0) 1893 return (EINVAL); 1894 odivisor = comspeed(t->c_ospeed, cy_clock, &oprescaler); 1895 if (odivisor < 0) 1896 return (EINVAL); 1897 1898 /* parameters are OK, convert them to the com struct and the device */ 1899 s = spltty(); 1900 if (odivisor == 0) 1901 (void)commctl(com, TIOCM_DTR, DMBIC); /* hang up line */ 1902 else 1903 (void)commctl(com, TIOCM_DTR, DMBIS); 1904 1905 (void) siosetwater(com, t->c_ispeed); 1906 1907 /* XXX we don't actually change the speed atomically. */ 1908 1909 if (idivisor != 0) { 1910 cd_setreg(com, CD1400_RBPR, idivisor); 1911 cd_setreg(com, CD1400_RCOR, iprescaler); 1912 } 1913 if (odivisor != 0) { 1914 cd_setreg(com, CD1400_TBPR, odivisor); 1915 cd_setreg(com, CD1400_TCOR, oprescaler); 1916 } 1917 1918 /* 1919 * channel control 1920 * receiver enable 1921 * transmitter enable (always set) 1922 */ 1923 cflag = t->c_cflag; 1924 opt = CD1400_CCR_CMDCHANCTL | CD1400_CCR_XMTEN 1925 | (cflag & CREAD ? CD1400_CCR_RCVEN : CD1400_CCR_RCVDIS); 1926 if (opt != com->channel_control) { 1927 com->channel_control = opt; 1928 cd1400_channel_cmd(com, opt); 1929 } 1930 1931#ifdef Smarts 1932 /* set special chars */ 1933 /* XXX if one is _POSIX_VDISABLE, can't use some others */ 1934 if (t->c_cc[VSTOP] != _POSIX_VDISABLE) 1935 cd_setreg(com, CD1400_SCHR1, t->c_cc[VSTOP]); 1936 if (t->c_cc[VSTART] != _POSIX_VDISABLE) 1937 cd_setreg(com, CD1400_SCHR2, t->c_cc[VSTART]); 1938 if (t->c_cc[VINTR] != _POSIX_VDISABLE) 1939 cd_setreg(com, CD1400_SCHR3, t->c_cc[VINTR]); 1940 if (t->c_cc[VSUSP] != _POSIX_VDISABLE) 1941 cd_setreg(com, CD1400_SCHR4, t->c_cc[VSUSP]); 1942#endif 1943 1944 /* 1945 * set channel option register 1 - 1946 * parity mode 1947 * stop bits 1948 * char length 1949 */ 1950 opt = 0; 1951 /* parity */ 1952 if (cflag & PARENB) { 1953 if (cflag & PARODD) 1954 opt |= CD1400_COR1_PARODD; 1955 opt |= CD1400_COR1_PARNORMAL; 1956 } 1957 iflag = t->c_iflag; 1958 if (!(iflag & INPCK)) 1959 opt |= CD1400_COR1_NOINPCK; 1960 bits = 1 + 1; 1961 /* stop bits */ 1962 if (cflag & CSTOPB) { 1963 ++bits; 1964 opt |= CD1400_COR1_STOP2; 1965 } 1966 /* char length */ 1967 switch (cflag & CSIZE) { 1968 case CS5: 1969 bits += 5; 1970 opt |= CD1400_COR1_CS5; 1971 break; 1972 case CS6: 1973 bits += 6; 1974 opt |= CD1400_COR1_CS6; 1975 break; 1976 case CS7: 1977 bits += 7; 1978 opt |= CD1400_COR1_CS7; 1979 break; 1980 default: 1981 bits += 8; 1982 opt |= CD1400_COR1_CS8; 1983 break; 1984 } 1985 cor_change = 0; 1986 if (opt != com->cor[0]) { 1987 cor_change |= CD1400_CCR_COR1; 1988 cd_setreg(com, CD1400_COR1, com->cor[0] = opt); 1989 } 1990 1991 /* 1992 * Set receive time-out period, normally to max(one char time, 5 ms). 1993 */ 1994 if (t->c_ispeed == 0) 1995 itimeout = cd_getreg(com, CD1400_RTPR); 1996 else { 1997 itimeout = (1000 * bits + t->c_ispeed - 1) / t->c_ispeed; 1998#ifdef SOFT_HOTCHAR 1999#define MIN_RTP 1 2000#else 2001#define MIN_RTP 5 2002#endif 2003 if (itimeout < MIN_RTP) 2004 itimeout = MIN_RTP; 2005 } 2006 if (!(t->c_lflag & ICANON) && t->c_cc[VMIN] != 0 && t->c_cc[VTIME] != 0 2007 && t->c_cc[VTIME] * 10 > itimeout) 2008 itimeout = t->c_cc[VTIME] * 10; 2009 if (itimeout > 255) 2010 itimeout = 255; 2011 cd_setreg(com, CD1400_RTPR, itimeout); 2012 2013 /* 2014 * set channel option register 2 - 2015 * flow control 2016 */ 2017 opt = 0; 2018#ifdef Smarts 2019 if (iflag & IXANY) 2020 opt |= CD1400_COR2_IXANY; 2021 if (iflag & IXOFF) 2022 opt |= CD1400_COR2_IXOFF; 2023#endif 2024#ifndef SOFT_CTS_OFLOW 2025 if (cflag & CCTS_OFLOW) 2026 opt |= CD1400_COR2_CCTS_OFLOW; 2027#endif 2028 intrsave = save_intr(); 2029 disable_intr(); 2030 COM_LOCK(); 2031 if (opt != com->cor[1]) { 2032 cor_change |= CD1400_CCR_COR2; 2033 cd_setreg(com, CD1400_COR2, com->cor[1] = opt); 2034 } 2035 COM_UNLOCK(); 2036 restore_intr(intrsave); 2037 2038 /* 2039 * set channel option register 3 - 2040 * receiver FIFO interrupt threshold 2041 * flow control 2042 */ 2043 opt = RxFifoThreshold; 2044#ifdef Smarts 2045 if (t->c_lflag & ICANON) 2046 opt |= CD1400_COR3_SCD34; /* detect INTR & SUSP chars */ 2047 if (iflag & IXOFF) 2048 /* detect and transparently handle START and STOP chars */ 2049 opt |= CD1400_COR3_FCT | CD1400_COR3_SCD12; 2050#endif 2051 if (opt != com->cor[2]) { 2052 cor_change |= CD1400_CCR_COR3; 2053 cd_setreg(com, CD1400_COR3, com->cor[2] = opt); 2054 } 2055 2056 /* notify the CD1400 if COR1-3 have changed */ 2057 if (cor_change) 2058 cd1400_channel_cmd(com, CD1400_CCR_CMDCORCHG | cor_change); 2059 2060 /* 2061 * set channel option register 4 - 2062 * CR/NL processing 2063 * break processing 2064 * received exception processing 2065 */ 2066 opt = 0; 2067 if (iflag & IGNCR) 2068 opt |= CD1400_COR4_IGNCR; 2069#ifdef Smarts 2070 /* 2071 * we need a new ttyinput() for this, as we don't want to 2072 * have ICRNL && INLCR being done in both layers, or to have 2073 * synchronisation problems 2074 */ 2075 if (iflag & ICRNL) 2076 opt |= CD1400_COR4_ICRNL; 2077 if (iflag & INLCR) 2078 opt |= CD1400_COR4_INLCR; 2079#endif 2080 if (iflag & IGNBRK) 2081 opt |= CD1400_COR4_IGNBRK | CD1400_COR4_NOBRKINT; 2082 /* 2083 * The `-ignbrk -brkint parmrk' case is not handled by the hardware, 2084 * so only tell the hardware about -brkint if -parmrk. 2085 */ 2086 if (!(iflag & (BRKINT | PARMRK))) 2087 opt |= CD1400_COR4_NOBRKINT; 2088#if 0 2089 /* XXX using this "intelligence" breaks reporting of overruns. */ 2090 if (iflag & IGNPAR) 2091 opt |= CD1400_COR4_PFO_DISCARD; 2092 else { 2093 if (iflag & PARMRK) 2094 opt |= CD1400_COR4_PFO_ESC; 2095 else 2096 opt |= CD1400_COR4_PFO_NUL; 2097 } 2098#else 2099 opt |= CD1400_COR4_PFO_EXCEPTION; 2100#endif 2101 cd_setreg(com, CD1400_COR4, opt); 2102 2103 /* 2104 * set channel option register 5 - 2105 */ 2106 opt = 0; 2107 if (iflag & ISTRIP) 2108 opt |= CD1400_COR5_ISTRIP; 2109 if (t->c_iflag & IEXTEN) 2110 /* enable LNEXT (e.g. ctrl-v quoting) handling */ 2111 opt |= CD1400_COR5_LNEXT; 2112#ifdef Smarts 2113 if (t->c_oflag & ONLCR) 2114 opt |= CD1400_COR5_ONLCR; 2115 if (t->c_oflag & OCRNL) 2116 opt |= CD1400_COR5_OCRNL; 2117#endif 2118 cd_setreg(com, CD1400_COR5, opt); 2119 2120 /* 2121 * We always generate modem status change interrupts for CD changes. 2122 * Among other things, this is necessary to track TS_CARR_ON for 2123 * pstat to print even when the driver doesn't care. CD changes 2124 * should be rare so interrupts for them are not worth extra code to 2125 * avoid. We avoid interrupts for other modem status changes (except 2126 * for CTS changes when SOFT_CTS_OFLOW is configured) since this is 2127 * simplest and best. 2128 */ 2129 2130 /* 2131 * set modem change option register 1 2132 * generate modem interrupts on which 1 -> 0 input transitions 2133 * also controls auto-DTR output flow-control, which we don't use 2134 */ 2135 opt = CD1400_MCOR1_CDzd; 2136#ifdef SOFT_CTS_OFLOW 2137 if (cflag & CCTS_OFLOW) 2138 opt |= CD1400_MCOR1_CTSzd; 2139#endif 2140 cd_setreg(com, CD1400_MCOR1, opt); 2141 2142 /* 2143 * set modem change option register 2 2144 * generate modem interrupts on specific 0 -> 1 input transitions 2145 */ 2146 opt = CD1400_MCOR2_CDod; 2147#ifdef SOFT_CTS_OFLOW 2148 if (cflag & CCTS_OFLOW) 2149 opt |= CD1400_MCOR2_CTSod; 2150#endif 2151 cd_setreg(com, CD1400_MCOR2, opt); 2152 2153 /* 2154 * XXX should have done this long ago, but there is too much state 2155 * to change all atomically. 2156 */ 2157 intrsave = save_intr(); 2158 disable_intr(); 2159 COM_LOCK(); 2160 2161 com->state &= ~CS_TTGO; 2162 if (!(tp->t_state & TS_TTSTOP)) 2163 com->state |= CS_TTGO; 2164 if (cflag & CRTS_IFLOW) { 2165 com->state |= CS_RTS_IFLOW; 2166 /* 2167 * If CS_RTS_IFLOW just changed from off to on, the change 2168 * needs to be propagated to MCR_RTS. This isn't urgent, 2169 * so do it later by calling comstart() instead of repeating 2170 * a lot of code from comstart() here. 2171 */ 2172 } else if (com->state & CS_RTS_IFLOW) { 2173 com->state &= ~CS_RTS_IFLOW; 2174 /* 2175 * CS_RTS_IFLOW just changed from on to off. Force MCR_RTS 2176 * on here, since comstart() won't do it later. 2177 */ 2178#if 0 2179 outb(com->modem_ctl_port, com->mcr_image |= MCR_RTS); 2180#else 2181 cd_setreg(com, com->mcr_rts_reg, 2182 com->mcr_image |= com->mcr_rts); 2183#endif 2184 } 2185 2186 /* 2187 * Set up state to handle output flow control. 2188 * XXX - worth handling MDMBUF (DCD) flow control at the lowest level? 2189 * Now has 10+ msec latency, while CTS flow has 50- usec latency. 2190 */ 2191 com->state |= CS_ODEVREADY; 2192#ifdef SOFT_CTS_OFLOW 2193 com->state &= ~CS_CTS_OFLOW; 2194 if (cflag & CCTS_OFLOW) { 2195 com->state |= CS_CTS_OFLOW; 2196 if (!(com->last_modem_status & MSR_CTS)) 2197 com->state &= ~CS_ODEVREADY; 2198 } 2199#endif 2200 /* XXX shouldn't call functions while intrs are disabled. */ 2201 disc_optim(tp, t, com); 2202#if 0 2203 /* 2204 * Recover from fiddling with CS_TTGO. We used to call siointr1() 2205 * unconditionally, but that defeated the careful discarding of 2206 * stale input in sioopen(). 2207 */ 2208 if (com->state >= (CS_BUSY | CS_TTGO)) 2209 siointr1(com); 2210#endif 2211 if (com->state >= (CS_BUSY | CS_TTGO | CS_ODEVREADY)) { 2212 if (!(com->intr_enable & CD1400_SRER_TXRDY)) 2213 cd_setreg(com, CD1400_SRER, 2214 com->intr_enable 2215 = (com->intr_enable & ~CD1400_SRER_TXMPTY) 2216 | CD1400_SRER_TXRDY); 2217 } else { 2218 if (com->intr_enable & CD1400_SRER_TXRDY) 2219 cd_setreg(com, CD1400_SRER, 2220 com->intr_enable 2221 = (com->intr_enable & ~CD1400_SRER_TXRDY) 2222 | CD1400_SRER_TXMPTY); 2223 } 2224 2225 COM_UNLOCK(); 2226 restore_intr(intrsave); 2227 splx(s); 2228 comstart(tp); 2229 if (com->ibufold != NULL) { 2230 free(com->ibufold, M_DEVBUF); 2231 com->ibufold = NULL; 2232 } 2233 return (0); 2234} 2235 2236static int 2237siosetwater(com, speed) 2238 struct com_s *com; 2239 speed_t speed; 2240{ 2241 int cp4ticks; 2242 u_char *ibuf; 2243 int ibufsize; 2244 struct tty *tp; 2245 int intrsave; 2246 2247 /* 2248 * Make the buffer size large enough to handle a softtty interrupt 2249 * latency of about 2 ticks without loss of throughput or data 2250 * (about 3 ticks if input flow control is not used or not honoured, 2251 * but a bit less for CS5-CS7 modes). 2252 */ 2253 cp4ticks = speed / 10 / hz * 4; 2254 for (ibufsize = 128; ibufsize < cp4ticks;) 2255 ibufsize <<= 1; 2256 if (ibufsize == com->ibufsize) { 2257 return (0); 2258 } 2259 2260 /* 2261 * Allocate input buffer. The extra factor of 2 in the size is 2262 * to allow for an error byte for each input byte. 2263 */ 2264 ibuf = malloc(2 * ibufsize, M_DEVBUF, M_NOWAIT); 2265 if (ibuf == NULL) { 2266 return (ENOMEM); 2267 } 2268 2269 /* Initialize non-critical variables. */ 2270 com->ibufold = com->ibuf; 2271 com->ibufsize = ibufsize; 2272 tp = com->tp; 2273 if (tp != NULL) { 2274 tp->t_ififosize = 2 * ibufsize; 2275 tp->t_ispeedwat = (speed_t)-1; 2276 tp->t_ospeedwat = (speed_t)-1; 2277 } 2278 2279 /* 2280 * Read current input buffer, if any. Continue with interrupts 2281 * disabled. 2282 */ 2283 intrsave = save_intr(); 2284 disable_intr(); 2285 COM_LOCK(); 2286 if (com->iptr != com->ibuf) 2287 sioinput(com); 2288 2289 /*- 2290 * Initialize critical variables, including input buffer watermarks. 2291 * The external device is asked to stop sending when the buffer 2292 * exactly reaches high water, or when the high level requests it. 2293 * The high level is notified immediately (rather than at a later 2294 * clock tick) when this watermark is reached. 2295 * The buffer size is chosen so the watermark should almost never 2296 * be reached. 2297 * The low watermark is invisibly 0 since the buffer is always 2298 * emptied all at once. 2299 */ 2300 com->iptr = com->ibuf = ibuf; 2301 com->ibufend = ibuf + ibufsize; 2302 com->ierroff = ibufsize; 2303 com->ihighwater = ibuf + 3 * ibufsize / 4; 2304 2305 COM_UNLOCK(); 2306 restore_intr(intrsave); 2307 return (0); 2308} 2309 2310static void 2311comstart(tp) 2312 struct tty *tp; 2313{ 2314 struct com_s *com; 2315 int s; 2316#ifdef CyDebug 2317 bool_t started; 2318#endif 2319 int unit; 2320 int intrsave; 2321 2322 unit = DEV_TO_UNIT(tp->t_dev); 2323 com = com_addr(unit); 2324 s = spltty(); 2325 2326#ifdef CyDebug 2327 ++com->start_count; 2328 started = FALSE; 2329#endif 2330 2331 intrsave = save_intr(); 2332 disable_intr(); 2333 COM_LOCK(); 2334 if (tp->t_state & TS_TTSTOP) { 2335 com->state &= ~CS_TTGO; 2336 if (com->intr_enable & CD1400_SRER_TXRDY) 2337 cd_setreg(com, CD1400_SRER, 2338 com->intr_enable 2339 = (com->intr_enable & ~CD1400_SRER_TXRDY) 2340 | CD1400_SRER_TXMPTY); 2341 } else { 2342 com->state |= CS_TTGO; 2343 if (com->state >= (CS_BUSY | CS_TTGO | CS_ODEVREADY) 2344 && !(com->intr_enable & CD1400_SRER_TXRDY)) 2345 cd_setreg(com, CD1400_SRER, 2346 com->intr_enable 2347 = (com->intr_enable & ~CD1400_SRER_TXMPTY) 2348 | CD1400_SRER_TXRDY); 2349 } 2350 if (tp->t_state & TS_TBLOCK) { 2351 if (com->mcr_image & com->mcr_rts && com->state & CS_RTS_IFLOW) 2352#if 0 2353 outb(com->modem_ctl_port, com->mcr_image &= ~MCR_RTS); 2354#else 2355 cd_setreg(com, com->mcr_rts_reg, 2356 com->mcr_image &= ~com->mcr_rts); 2357#endif 2358 } else { 2359 if (!(com->mcr_image & com->mcr_rts) 2360 && com->iptr < com->ihighwater 2361 && com->state & CS_RTS_IFLOW) 2362#if 0 2363 outb(com->modem_ctl_port, com->mcr_image |= MCR_RTS); 2364#else 2365 cd_setreg(com, com->mcr_rts_reg, 2366 com->mcr_image |= com->mcr_rts); 2367#endif 2368 } 2369 COM_UNLOCK(); 2370 restore_intr(intrsave); 2371 if (tp->t_state & (TS_TIMEOUT | TS_TTSTOP)) { 2372 ttwwakeup(tp); 2373 splx(s); 2374 return; 2375 } 2376 if (tp->t_outq.c_cc != 0) { 2377 struct lbq *qp; 2378 struct lbq *next; 2379 2380 if (!com->obufs[0].l_queued) { 2381#ifdef CyDebug 2382 started = TRUE; 2383#endif 2384 com->obufs[0].l_tail 2385 = com->obuf1 + q_to_b(&tp->t_outq, com->obuf1, 2386 sizeof com->obuf1); 2387 com->obufs[0].l_next = NULL; 2388 com->obufs[0].l_queued = TRUE; 2389 intrsave = save_intr(); 2390 disable_intr(); 2391 COM_LOCK(); 2392 if (com->state & CS_BUSY) { 2393 qp = com->obufq.l_next; 2394 while ((next = qp->l_next) != NULL) 2395 qp = next; 2396 qp->l_next = &com->obufs[0]; 2397 } else { 2398 com->obufq.l_head = com->obufs[0].l_head; 2399 com->obufq.l_tail = com->obufs[0].l_tail; 2400 com->obufq.l_next = &com->obufs[0]; 2401 com->state |= CS_BUSY; 2402 if (com->state >= (CS_BUSY | CS_TTGO 2403 | CS_ODEVREADY)) 2404 cd_setreg(com, CD1400_SRER, 2405 com->intr_enable 2406 = (com->intr_enable 2407 & ~CD1400_SRER_TXMPTY) 2408 | CD1400_SRER_TXRDY); 2409 } 2410 COM_UNLOCK(); 2411 restore_intr(intrsave); 2412 } 2413 if (tp->t_outq.c_cc != 0 && !com->obufs[1].l_queued) { 2414#ifdef CyDebug 2415 started = TRUE; 2416#endif 2417 com->obufs[1].l_tail 2418 = com->obuf2 + q_to_b(&tp->t_outq, com->obuf2, 2419 sizeof com->obuf2); 2420 com->obufs[1].l_next = NULL; 2421 com->obufs[1].l_queued = TRUE; 2422 intrsave = save_intr(); 2423 disable_intr(); 2424 COM_LOCK(); 2425 if (com->state & CS_BUSY) { 2426 qp = com->obufq.l_next; 2427 while ((next = qp->l_next) != NULL) 2428 qp = next; 2429 qp->l_next = &com->obufs[1]; 2430 } else { 2431 com->obufq.l_head = com->obufs[1].l_head; 2432 com->obufq.l_tail = com->obufs[1].l_tail; 2433 com->obufq.l_next = &com->obufs[1]; 2434 com->state |= CS_BUSY; 2435 if (com->state >= (CS_BUSY | CS_TTGO 2436 | CS_ODEVREADY)) 2437 cd_setreg(com, CD1400_SRER, 2438 com->intr_enable 2439 = (com->intr_enable 2440 & ~CD1400_SRER_TXMPTY) 2441 | CD1400_SRER_TXRDY); 2442 } 2443 COM_UNLOCK(); 2444 restore_intr(intrsave); 2445 } 2446 tp->t_state |= TS_BUSY; 2447 } 2448#ifdef CyDebug 2449 if (started) 2450 ++com->start_real; 2451#endif 2452#if 0 2453 intrsave = save_intr(); 2454 disable_intr(); 2455 COM_LOCK(); 2456 if (com->state >= (CS_BUSY | CS_TTGO)) 2457 siointr1(com); /* fake interrupt to start output */ 2458 COM_UNLOCK(); 2459 restore_intr(intrsave); 2460#endif 2461 ttwwakeup(tp); 2462 splx(s); 2463} 2464 2465static void 2466comstop(tp, rw) 2467 struct tty *tp; 2468 int rw; 2469{ 2470 struct com_s *com; 2471 bool_t wakeup_etc; 2472 int intrsave; 2473 2474 com = com_addr(DEV_TO_UNIT(tp->t_dev)); 2475 wakeup_etc = FALSE; 2476 intrsave = save_intr(); 2477 disable_intr(); 2478 COM_LOCK(); 2479 if (rw & FWRITE) { 2480 com->obufs[0].l_queued = FALSE; 2481 com->obufs[1].l_queued = FALSE; 2482 if (com->extra_state & CSE_ODONE) { 2483 com_events -= LOTS_OF_EVENTS; 2484 com->extra_state &= ~CSE_ODONE; 2485 if (com->etc != ETC_NONE) { 2486 if (com->etc == ETC_BREAK_ENDED) 2487 com->etc = ETC_NONE; 2488 wakeup_etc = TRUE; 2489 } 2490 } 2491 com->tp->t_state &= ~TS_BUSY; 2492 if (com->state & CS_ODONE) 2493 com_events -= LOTS_OF_EVENTS; 2494 com->state &= ~(CS_ODONE | CS_BUSY); 2495 } 2496 if (rw & FREAD) { 2497 /* XXX no way to reset only input fifo. */ 2498 com_events -= (com->iptr - com->ibuf); 2499 com->iptr = com->ibuf; 2500 } 2501 COM_UNLOCK(); 2502 restore_intr(intrsave); 2503 if (wakeup_etc) 2504 wakeup(&com->etc); 2505 if (rw & FWRITE && com->etc == ETC_NONE) 2506 cd1400_channel_cmd(com, CD1400_CCR_CMDRESET | CD1400_CCR_FTF); 2507 comstart(tp); 2508} 2509 2510static int 2511commctl(com, bits, how) 2512 struct com_s *com; 2513 int bits; 2514 int how; 2515{ 2516 int mcr; 2517 int msr; 2518 int intrsave; 2519 2520 if (how == DMGET) { 2521 if (com->channel_control & CD1400_CCR_RCVEN) 2522 bits |= TIOCM_LE; 2523 mcr = com->mcr_image; 2524 if (mcr & com->mcr_dtr) 2525 bits |= TIOCM_DTR; 2526 if (mcr & com->mcr_rts) 2527 /* XXX wired on for Cyclom-8Ys */ 2528 bits |= TIOCM_RTS; 2529 2530 /* 2531 * We must read the modem status from the hardware because 2532 * we don't generate modem status change interrupts for all 2533 * changes, so com->prev_modem_status is not guaranteed to 2534 * be up to date. This is safe, unlike for sio, because 2535 * reading the status register doesn't clear pending modem 2536 * status change interrupts. 2537 */ 2538 msr = cd_getreg(com, CD1400_MSVR2); 2539 2540 if (msr & MSR_CTS) 2541 bits |= TIOCM_CTS; 2542 if (msr & MSR_DCD) 2543 bits |= TIOCM_CD; 2544 if (msr & MSR_DSR) 2545 bits |= TIOCM_DSR; 2546 if (msr & MSR_RI) 2547 /* XXX not connected except for Cyclom-16Y? */ 2548 bits |= TIOCM_RI; 2549 return (bits); 2550 } 2551 mcr = 0; 2552 if (bits & TIOCM_DTR) 2553 mcr |= com->mcr_dtr; 2554 if (bits & TIOCM_RTS) 2555 mcr |= com->mcr_rts; 2556 intrsave = save_intr(); 2557 disable_intr(); 2558 COM_LOCK(); 2559 switch (how) { 2560 case DMSET: 2561 com->mcr_image = mcr; 2562 cd_setreg(com, CD1400_MSVR1, mcr); 2563 cd_setreg(com, CD1400_MSVR2, mcr); 2564 break; 2565 case DMBIS: 2566 com->mcr_image = mcr = com->mcr_image | mcr; 2567 cd_setreg(com, CD1400_MSVR1, mcr); 2568 cd_setreg(com, CD1400_MSVR2, mcr); 2569 break; 2570 case DMBIC: 2571 com->mcr_image = mcr = com->mcr_image & ~mcr; 2572 cd_setreg(com, CD1400_MSVR1, mcr); 2573 cd_setreg(com, CD1400_MSVR2, mcr); 2574 break; 2575 } 2576 COM_UNLOCK(); 2577 restore_intr(intrsave); 2578 return (0); 2579} 2580 2581static void 2582siosettimeout() 2583{ 2584 struct com_s *com; 2585 bool_t someopen; 2586 int unit; 2587 2588 /* 2589 * Set our timeout period to 1 second if no polled devices are open. 2590 * Otherwise set it to max(1/200, 1/hz). 2591 * Enable timeouts iff some device is open. 2592 */ 2593 untimeout(comwakeup, (void *)NULL, sio_timeout_handle); 2594 sio_timeout = hz; 2595 someopen = FALSE; 2596 for (unit = 0; unit < NSIO; ++unit) { 2597 com = com_addr(unit); 2598 if (com != NULL && com->tp != NULL 2599 && com->tp->t_state & TS_ISOPEN) { 2600 someopen = TRUE; 2601#if 0 2602 if (com->poll || com->poll_output) { 2603 sio_timeout = hz > 200 ? hz / 200 : 1; 2604 break; 2605 } 2606#endif 2607 } 2608 } 2609 if (someopen) { 2610 sio_timeouts_until_log = hz / sio_timeout; 2611 sio_timeout_handle = timeout(comwakeup, (void *)NULL, 2612 sio_timeout); 2613 } else { 2614 /* Flush error messages, if any. */ 2615 sio_timeouts_until_log = 1; 2616 comwakeup((void *)NULL); 2617 untimeout(comwakeup, (void *)NULL, sio_timeout_handle); 2618 } 2619} 2620 2621static void 2622comwakeup(chan) 2623 void *chan; 2624{ 2625 struct com_s *com; 2626 int unit; 2627 2628 sio_timeout_handle = timeout(comwakeup, (void *)NULL, sio_timeout); 2629 2630#if 0 2631 /* 2632 * Recover from lost output interrupts. 2633 * Poll any lines that don't use interrupts. 2634 */ 2635 for (unit = 0; unit < NSIO; ++unit) { 2636 com = com_addr(unit); 2637 if (com != NULL 2638 && (com->state >= (CS_BUSY | CS_TTGO) || com->poll)) { 2639 int intrsave; 2640 2641 intrsave = save_intr(); 2642 disable_intr(); 2643 COM_LOCK(); 2644 siointr1(com); 2645 COM_UNLOCK(); 2646 restore_intr(intrsave); 2647 } 2648 } 2649#endif 2650 2651 /* 2652 * Check for and log errors, but not too often. 2653 */ 2654 if (--sio_timeouts_until_log > 0) 2655 return; 2656 sio_timeouts_until_log = hz / sio_timeout; 2657 for (unit = 0; unit < NSIO; ++unit) { 2658 int errnum; 2659 2660 com = com_addr(unit); 2661 if (com == NULL) 2662 continue; 2663 for (errnum = 0; errnum < CE_NTYPES; ++errnum) { 2664 u_int delta; 2665 u_long total; 2666 int intrsave; 2667 2668 intrsave = save_intr(); 2669 disable_intr(); 2670 COM_LOCK(); 2671 delta = com->delta_error_counts[errnum]; 2672 com->delta_error_counts[errnum] = 0; 2673 COM_UNLOCK(); 2674 restore_intr(intrsave); 2675 if (delta == 0) 2676 continue; 2677 total = com->error_counts[errnum] += delta; 2678 log(LOG_ERR, "cy%d: %u more %s%s (total %lu)\n", 2679 unit, delta, error_desc[errnum], 2680 delta == 1 ? "" : "s", total); 2681 } 2682 } 2683} 2684 2685static void 2686disc_optim(tp, t, com) 2687 struct tty *tp; 2688 struct termios *t; 2689 struct com_s *com; 2690{ 2691#ifndef SOFT_HOTCHAR 2692 u_char opt; 2693#endif 2694 2695 /* 2696 * XXX can skip a lot more cases if Smarts. Maybe 2697 * (IGNCR | ISTRIP | IXON) in c_iflag. But perhaps we 2698 * shouldn't skip if (TS_CNTTB | TS_LNCH) is set in t_state. 2699 */ 2700 if (!(t->c_iflag & (ICRNL | IGNCR | IMAXBEL | INLCR | ISTRIP | IXON)) 2701 && (!(t->c_iflag & BRKINT) || (t->c_iflag & IGNBRK)) 2702 && (!(t->c_iflag & PARMRK) 2703 || (t->c_iflag & (IGNPAR | IGNBRK)) == (IGNPAR | IGNBRK)) 2704 && !(t->c_lflag & (ECHO | ICANON | IEXTEN | ISIG | PENDIN)) 2705 && linesw[tp->t_line].l_rint == ttyinput) 2706 tp->t_state |= TS_CAN_BYPASS_L_RINT; 2707 else 2708 tp->t_state &= ~TS_CAN_BYPASS_L_RINT; 2709 com->hotchar = linesw[tp->t_line].l_hotchar; 2710#ifndef SOFT_HOTCHAR 2711 opt = com->cor[2] & ~CD1400_COR3_SCD34; 2712 if (com->hotchar != 0) { 2713 cd_setreg(com, CD1400_SCHR3, com->hotchar); 2714 cd_setreg(com, CD1400_SCHR4, com->hotchar); 2715 opt |= CD1400_COR3_SCD34; 2716 } 2717 if (opt != com->cor[2]) { 2718 cd_setreg(com, CD1400_COR3, com->cor[2] = opt); 2719 cd1400_channel_cmd(com, CD1400_CCR_CMDCORCHG | CD1400_CCR_COR3); 2720 } 2721#endif 2722} 2723 2724#ifdef Smarts 2725/* standard line discipline input routine */ 2726int 2727cyinput(c, tp) 2728 int c; 2729 struct tty *tp; 2730{ 2731 /* XXX duplicate ttyinput(), but without the IXOFF/IXON/ISTRIP/IPARMRK 2732 * bits, as they are done by the CD1400. Hardly worth the effort, 2733 * given that high-throughput sessions are raw anyhow. 2734 */ 2735} 2736#endif /* Smarts */ 2737 2738static int 2739comspeed(speed, cy_clock, prescaler_io) 2740 speed_t speed; 2741 u_long cy_clock; 2742 int *prescaler_io; 2743{ 2744 int actual; 2745 int error; 2746 int divider; 2747 int prescaler; 2748 int prescaler_unit; 2749 2750 if (speed == 0) 2751 return (0); 2752 if (speed < 0 || speed > 150000) 2753 return (-1); 2754 2755 /* determine which prescaler to use */ 2756 for (prescaler_unit = 4, prescaler = 2048; prescaler_unit; 2757 prescaler_unit--, prescaler >>= 2) { 2758 if (cy_clock / prescaler / speed > 63) 2759 break; 2760 } 2761 2762 divider = (cy_clock / prescaler * 2 / speed + 1) / 2; /* round off */ 2763 if (divider > 255) 2764 divider = 255; 2765 actual = cy_clock/prescaler/divider; 2766 2767 /* 10 times error in percent: */ 2768 error = ((actual - (long)speed) * 2000 / (long)speed + 1) / 2; 2769 2770 /* 3.0% max error tolerance */ 2771 if (error < -30 || error > 30) 2772 return (-1); 2773 2774#if 0 2775 printf("prescaler = %d (%d)\n", prescaler, prescaler_unit); 2776 printf("divider = %d (%x)\n", divider, divider); 2777 printf("actual = %d\n", actual); 2778 printf("error = %d\n", error); 2779#endif 2780 2781 *prescaler_io = prescaler_unit; 2782 return (divider); 2783} 2784 2785static void 2786cd1400_channel_cmd(com, cmd) 2787 struct com_s *com; 2788 int cmd; 2789{ 2790 cd1400_channel_cmd_wait(com); 2791 cd_setreg(com, CD1400_CCR, cmd); 2792 cd1400_channel_cmd_wait(com); 2793} 2794 2795static void 2796cd1400_channel_cmd_wait(com) 2797 struct com_s *com; 2798{ 2799 struct timeval start; 2800 struct timeval tv; 2801 long usec; 2802 2803 if (cd_getreg(com, CD1400_CCR) == 0) 2804 return; 2805 microtime(&start); 2806 for (;;) { 2807 if (cd_getreg(com, CD1400_CCR) == 0) 2808 return; 2809 microtime(&tv); 2810 usec = 1000000 * (tv.tv_sec - start.tv_sec) + 2811 tv.tv_usec - start.tv_usec; 2812 if (usec >= 5000) { 2813 log(LOG_ERR, 2814 "cy%d: channel command timeout (%ld usec)\n", 2815 com->unit, usec); 2816 return; 2817 } 2818 } 2819} 2820 2821static void 2822cd_etc(com, etc) 2823 struct com_s *com; 2824 int etc; 2825{ 2826 int intrsave; 2827 2828 /* 2829 * We can't change the hardware's ETC state while there are any 2830 * characters in the tx fifo, since those characters would be 2831 * interpreted as commands! Unputting characters from the fifo 2832 * is difficult, so we wait up to 12 character times for the fifo 2833 * to drain. The command will be delayed for up to 2 character 2834 * times for the tx to become empty. Unputting characters from 2835 * the tx holding and shift registers is impossible, so we wait 2836 * for the tx to become empty so that the command is sure to be 2837 * executed soon after we issue it. 2838 */ 2839 intrsave = save_intr(); 2840 disable_intr(); 2841 COM_LOCK(); 2842 if (com->etc == etc) 2843 goto wait; 2844 if ((etc == CD1400_ETC_SENDBREAK 2845 && (com->etc == ETC_BREAK_STARTING 2846 || com->etc == ETC_BREAK_STARTED)) 2847 || (etc == CD1400_ETC_STOPBREAK 2848 && (com->etc == ETC_BREAK_ENDING || com->etc == ETC_BREAK_ENDED 2849 || com->etc == ETC_NONE))) { 2850 COM_UNLOCK(); 2851 restore_intr(intrsave); 2852 return; 2853 } 2854 com->etc = etc; 2855 cd_setreg(com, CD1400_SRER, 2856 com->intr_enable 2857 = (com->intr_enable & ~CD1400_SRER_TXRDY) | CD1400_SRER_TXMPTY); 2858wait: 2859 COM_UNLOCK(); 2860 restore_intr(intrsave); 2861 while (com->etc == etc 2862 && tsleep(&com->etc, TTIPRI | PCATCH, "cyetc", 0) == 0) 2863 continue; 2864} 2865 2866static int 2867cd_getreg(com, reg) 2868 struct com_s *com; 2869 int reg; 2870{ 2871 struct com_s *basecom; 2872 u_char car; 2873 int cy_align; 2874 int intrsave; 2875 cy_addr iobase; 2876 int val; 2877 2878 basecom = com_addr(com->unit & ~(CD1400_NO_OF_CHANNELS - 1)); 2879 car = com->unit & CD1400_CAR_CHAN; 2880 cy_align = com->cy_align; 2881 iobase = com->iobase; 2882 intrsave = save_intr(); 2883 disable_intr(); 2884 if (intrsave & PSL_I) 2885 COM_LOCK(); 2886 if (basecom->car != car) 2887 cd_outb(iobase, CD1400_CAR, cy_align, basecom->car = car); 2888 val = cd_inb(iobase, reg, cy_align); 2889 if (intrsave & PSL_I) 2890 COM_UNLOCK(); 2891 restore_intr(intrsave); 2892 return (val); 2893} 2894 2895static void 2896cd_setreg(com, reg, val) 2897 struct com_s *com; 2898 int reg; 2899 int val; 2900{ 2901 struct com_s *basecom; 2902 u_char car; 2903 int cy_align; 2904 int intrsave; 2905 cy_addr iobase; 2906 2907 basecom = com_addr(com->unit & ~(CD1400_NO_OF_CHANNELS - 1)); 2908 car = com->unit & CD1400_CAR_CHAN; 2909 cy_align = com->cy_align; 2910 iobase = com->iobase; 2911 intrsave = save_intr(); 2912 disable_intr(); 2913 if (intrsave & PSL_I) 2914 COM_LOCK(); 2915 if (basecom->car != car) 2916 cd_outb(iobase, CD1400_CAR, cy_align, basecom->car = car); 2917 cd_outb(iobase, reg, cy_align, val); 2918 if (intrsave & PSL_I) 2919 COM_UNLOCK(); 2920 restore_intr(intrsave); 2921} 2922 2923#ifdef CyDebug 2924/* useful in ddb */ 2925void 2926cystatus(unit) 2927 int unit; 2928{ 2929 struct com_s *com; 2930 cy_addr iobase; 2931 u_int ocount; 2932 struct tty *tp; 2933 2934 com = com_addr(unit); 2935 printf("info for channel %d\n", unit); 2936 printf("------------------\n"); 2937 printf("total cyclom service probes:\t%d\n", cy_svrr_probes); 2938 printf("calls to upper layer:\t\t%d\n", cy_timeouts); 2939 if (com == NULL) 2940 return; 2941 iobase = com->iobase; 2942 printf("\n"); 2943 printf("cd1400 base address:\\tt%p\n", iobase); 2944 printf("saved channel_control:\t\t0x%02x\n", com->channel_control); 2945 printf("saved cor1-3:\t\t\t0x%02x 0x%02x 0x%02x\n", 2946 com->cor[0], com->cor[1], com->cor[2]); 2947 printf("service request enable reg:\t0x%02x (0x%02x cached)\n", 2948 cd_getreg(com, CD1400_SRER), com->intr_enable); 2949 printf("service request register:\t0x%02x\n", 2950 cd_inb(iobase, CD1400_SVRR, com->cy_align)); 2951 printf("modem status:\t\t\t0x%02x (0x%02x cached)\n", 2952 cd_getreg(com, CD1400_MSVR2), com->prev_modem_status); 2953 printf("rx/tx/mdm interrupt registers:\t0x%02x 0x%02x 0x%02x\n", 2954 cd_inb(iobase, CD1400_RIR, com->cy_align), 2955 cd_inb(iobase, CD1400_TIR, com->cy_align), 2956 cd_inb(iobase, CD1400_MIR, com->cy_align)); 2957 printf("\n"); 2958 printf("com state:\t\t\t0x%02x\n", com->state); 2959 printf("calls to comstart():\t\t%d (%d useful)\n", 2960 com->start_count, com->start_real); 2961 printf("rx buffer chars free:\t\t%d\n", com->iptr - com->ibuf); 2962 ocount = 0; 2963 if (com->obufs[0].l_queued) 2964 ocount += com->obufs[0].l_tail - com->obufs[0].l_head; 2965 if (com->obufs[1].l_queued) 2966 ocount += com->obufs[1].l_tail - com->obufs[1].l_head; 2967 printf("tx buffer chars:\t\t%u\n", ocount); 2968 printf("received chars:\t\t\t%d\n", com->bytes_in); 2969 printf("received exceptions:\t\t%d\n", com->recv_exception); 2970 printf("modem signal deltas:\t\t%d\n", com->mdm); 2971 printf("transmitted chars:\t\t%d\n", com->bytes_out); 2972 printf("\n"); 2973 tp = com->tp; 2974 if (tp != NULL) { 2975 printf("tty state:\t\t\t0x%08x\n", tp->t_state); 2976 printf( 2977 "upper layer queue lengths:\t%d raw, %d canon, %d output\n", 2978 tp->t_rawq.c_cc, tp->t_canq.c_cc, tp->t_outq.c_cc); 2979 } else 2980 printf("tty state:\t\t\tclosed\n"); 2981} 2982#endif /* CyDebug */ 2983