sio.c revision 66698
1/*- 2 * Copyright (c) 1991 The Regents of the University of California. 3 * All rights reserved. 4 * 5 * Redistribution and use in source and binary forms, with or without 6 * modification, are permitted provided that the following conditions 7 * are met: 8 * 1. Redistributions of source code must retain the above copyright 9 * notice, this list of conditions and the following disclaimer. 10 * 2. Redistributions in binary form must reproduce the above copyright 11 * notice, this list of conditions and the following disclaimer in the 12 * documentation and/or other materials provided with the distribution. 13 * 3. All advertising materials mentioning features or use of this software 14 * must display the following acknowledgement: 15 * This product includes software developed by the University of 16 * California, Berkeley and its contributors. 17 * 4. Neither the name of the University nor the names of its contributors 18 * may be used to endorse or promote products derived from this software 19 * without specific prior written permission. 20 * 21 * THIS SOFTWARE IS PROVIDED BY THE REGENTS AND CONTRIBUTORS ``AS IS'' AND 22 * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE 23 * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE 24 * ARE DISCLAIMED. IN NO EVENT SHALL THE REGENTS OR CONTRIBUTORS BE LIABLE 25 * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL 26 * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS 27 * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) 28 * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT 29 * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY 30 * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF 31 * SUCH DAMAGE. 32 * 33 * $FreeBSD: head/sys/dev/sio/sio.c 66698 2000-10-05 23:09:57Z jhb $ 34 * from: @(#)com.c 7.5 (Berkeley) 5/16/91 35 * from: i386/isa sio.c,v 1.234 36 */ 37 38#include "opt_comconsole.h" 39#include "opt_compat.h" 40#include "opt_ddb.h" 41#include "opt_sio.h" 42#include "card.h" 43#include "pci.h" 44#include "sio.h" 45 46/* 47 * Serial driver, based on 386BSD-0.1 com driver. 48 * Mostly rewritten to use pseudo-DMA. 49 * Works for National Semiconductor NS8250-NS16550AF UARTs. 50 * COM driver, based on HP dca driver. 51 * 52 * Changes for PC-Card integration: 53 * - Added PC-Card driver table and handlers 54 */ 55#include <sys/param.h> 56#include <sys/bus.h> 57#include <sys/systm.h> 58#include <sys/reboot.h> 59#include <sys/malloc.h> 60#include <sys/tty.h> 61#include <sys/proc.h> 62#include <sys/module.h> 63#include <sys/conf.h> 64#include <sys/dkstat.h> 65#include <sys/fcntl.h> 66#include <sys/interrupt.h> 67#include <sys/ipl.h> 68#include <sys/kernel.h> 69#include <sys/syslog.h> 70#include <sys/sysctl.h> 71#include <sys/bus.h> 72#include <machine/bus_pio.h> 73#include <machine/bus.h> 74#include <sys/rman.h> 75#include <sys/timetc.h> 76#include <sys/timepps.h> 77 78#include <isa/isareg.h> 79#include <isa/isavar.h> 80#if NPCI > 0 81#include <pci/pcireg.h> 82#include <pci/pcivar.h> 83#endif 84#include <machine/lock.h> 85 86#include <machine/clock.h> 87#ifndef SMP 88#include <machine/lock.h> 89#endif 90#include <machine/resource.h> 91 92#include <isa/sioreg.h> 93 94#ifdef COM_ESP 95#include <isa/ic/esp.h> 96#endif 97#include <isa/ic/ns16550.h> 98 99/* XXX - this is ok because we only do sio fast interrupts on i386 */ 100#ifndef __i386__ 101#define disable_intr() 102#define enable_intr() 103#endif 104 105#define LOTS_OF_EVENTS 64 /* helps separate urgent events from input */ 106 107#define CALLOUT_MASK 0x80 108#define CONTROL_MASK 0x60 109#define CONTROL_INIT_STATE 0x20 110#define CONTROL_LOCK_STATE 0x40 111#define DEV_TO_UNIT(dev) (MINOR_TO_UNIT(minor(dev))) 112#define MINOR_MAGIC_MASK (CALLOUT_MASK | CONTROL_MASK) 113#define MINOR_TO_UNIT(mynor) ((mynor) & ~MINOR_MAGIC_MASK) 114 115#ifdef COM_MULTIPORT 116/* checks in flags for multiport and which is multiport "master chip" 117 * for a given card 118 */ 119#define COM_ISMULTIPORT(flags) ((flags) & 0x01) 120#define COM_MPMASTER(flags) (((flags) >> 8) & 0x0ff) 121#define COM_NOTAST4(flags) ((flags) & 0x04) 122#endif /* COM_MULTIPORT */ 123 124#define COM_CONSOLE(flags) ((flags) & 0x10) 125#define COM_FORCECONSOLE(flags) ((flags) & 0x20) 126#define COM_LLCONSOLE(flags) ((flags) & 0x40) 127#define COM_DEBUGGER(flags) ((flags) & 0x80) 128#define COM_LOSESOUTINTS(flags) ((flags) & 0x08) 129#define COM_NOFIFO(flags) ((flags) & 0x02) 130#define COM_ST16650A(flags) ((flags) & 0x20000) 131#define COM_C_NOPROBE (0x40000) 132#define COM_NOPROBE(flags) ((flags) & COM_C_NOPROBE) 133#define COM_C_IIR_TXRDYBUG (0x80000) 134#define COM_IIR_TXRDYBUG(flags) ((flags) & COM_C_IIR_TXRDYBUG) 135#define COM_FIFOSIZE(flags) (((flags) & 0xff000000) >> 24) 136 137#define com_scr 7 /* scratch register for 16450-16550 (R/W) */ 138 139#define sio_getreg(com, off) \ 140 (bus_space_read_1((com)->bst, (com)->bsh, (off))) 141#define sio_setreg(com, off, value) \ 142 (bus_space_write_1((com)->bst, (com)->bsh, (off), (value))) 143 144/* 145 * com state bits. 146 * (CS_BUSY | CS_TTGO) and (CS_BUSY | CS_TTGO | CS_ODEVREADY) must be higher 147 * than the other bits so that they can be tested as a group without masking 148 * off the low bits. 149 * 150 * The following com and tty flags correspond closely: 151 * CS_BUSY = TS_BUSY (maintained by comstart(), siopoll() and 152 * comstop()) 153 * CS_TTGO = ~TS_TTSTOP (maintained by comparam() and comstart()) 154 * CS_CTS_OFLOW = CCTS_OFLOW (maintained by comparam()) 155 * CS_RTS_IFLOW = CRTS_IFLOW (maintained by comparam()) 156 * TS_FLUSH is not used. 157 * XXX I think TIOCSETA doesn't clear TS_TTSTOP when it clears IXON. 158 * XXX CS_*FLOW should be CF_*FLOW in com->flags (control flags not state). 159 */ 160#define CS_BUSY 0x80 /* output in progress */ 161#define CS_TTGO 0x40 /* output not stopped by XOFF */ 162#define CS_ODEVREADY 0x20 /* external device h/w ready (CTS) */ 163#define CS_CHECKMSR 1 /* check of MSR scheduled */ 164#define CS_CTS_OFLOW 2 /* use CTS output flow control */ 165#define CS_DTR_OFF 0x10 /* DTR held off */ 166#define CS_ODONE 4 /* output completed */ 167#define CS_RTS_IFLOW 8 /* use RTS input flow control */ 168#define CSE_BUSYCHECK 1 /* siobusycheck() scheduled */ 169 170static char const * const error_desc[] = { 171#define CE_OVERRUN 0 172 "silo overflow", 173#define CE_INTERRUPT_BUF_OVERFLOW 1 174 "interrupt-level buffer overflow", 175#define CE_TTY_BUF_OVERFLOW 2 176 "tty-level buffer overflow", 177}; 178 179#define CE_NTYPES 3 180#define CE_RECORD(com, errnum) (++(com)->delta_error_counts[errnum]) 181 182/* types. XXX - should be elsewhere */ 183typedef u_int Port_t; /* hardware port */ 184typedef u_char bool_t; /* boolean */ 185 186/* queue of linear buffers */ 187struct lbq { 188 u_char *l_head; /* next char to process */ 189 u_char *l_tail; /* one past the last char to process */ 190 struct lbq *l_next; /* next in queue */ 191 bool_t l_queued; /* nonzero if queued */ 192}; 193 194/* com device structure */ 195struct com_s { 196 u_int flags; /* Copy isa device flags */ 197 u_char state; /* miscellaneous flag bits */ 198 bool_t active_out; /* nonzero if the callout device is open */ 199 u_char cfcr_image; /* copy of value written to CFCR */ 200#ifdef COM_ESP 201 bool_t esp; /* is this unit a hayes esp board? */ 202#endif 203 u_char extra_state; /* more flag bits, separate for order trick */ 204 u_char fifo_image; /* copy of value written to FIFO */ 205 bool_t hasfifo; /* nonzero for 16550 UARTs */ 206 bool_t st16650a; /* Is a Startech 16650A or RTS/CTS compat */ 207 bool_t loses_outints; /* nonzero if device loses output interrupts */ 208 u_char mcr_image; /* copy of value written to MCR */ 209#ifdef COM_MULTIPORT 210 bool_t multiport; /* is this unit part of a multiport device? */ 211#endif /* COM_MULTIPORT */ 212 bool_t no_irq; /* nonzero if irq is not attached */ 213 bool_t gone; /* hardware disappeared */ 214 bool_t poll; /* nonzero if polling is required */ 215 bool_t poll_output; /* nonzero if polling for output is required */ 216 int unit; /* unit number */ 217 int dtr_wait; /* time to hold DTR down on close (* 1/hz) */ 218 u_int tx_fifo_size; 219 u_int wopeners; /* # processes waiting for DCD in open() */ 220 221 /* 222 * The high level of the driver never reads status registers directly 223 * because there would be too many side effects to handle conveniently. 224 * Instead, it reads copies of the registers stored here by the 225 * interrupt handler. 226 */ 227 u_char last_modem_status; /* last MSR read by intr handler */ 228 u_char prev_modem_status; /* last MSR handled by high level */ 229 230 u_char hotchar; /* ldisc-specific char to be handled ASAP */ 231 u_char *ibuf; /* start of input buffer */ 232 u_char *ibufend; /* end of input buffer */ 233 u_char *ibufold; /* old input buffer, to be freed */ 234 u_char *ihighwater; /* threshold in input buffer */ 235 u_char *iptr; /* next free spot in input buffer */ 236 int ibufsize; /* size of ibuf (not include error bytes) */ 237 int ierroff; /* offset of error bytes in ibuf */ 238 239 struct lbq obufq; /* head of queue of output buffers */ 240 struct lbq obufs[2]; /* output buffers */ 241 242 bus_space_tag_t bst; 243 bus_space_handle_t bsh; 244 245 Port_t data_port; /* i/o ports */ 246#ifdef COM_ESP 247 Port_t esp_port; 248#endif 249 Port_t int_id_port; 250 Port_t modem_ctl_port; 251 Port_t line_status_port; 252 Port_t modem_status_port; 253 Port_t intr_ctl_port; /* Ports of IIR register */ 254 255 struct tty *tp; /* cross reference */ 256 257 /* Initial state. */ 258 struct termios it_in; /* should be in struct tty */ 259 struct termios it_out; 260 261 /* Lock state. */ 262 struct termios lt_in; /* should be in struct tty */ 263 struct termios lt_out; 264 265 bool_t do_timestamp; 266 bool_t do_dcd_timestamp; 267 struct timeval timestamp; 268 struct timeval dcd_timestamp; 269 struct pps_state pps; 270 271 u_long bytes_in; /* statistics */ 272 u_long bytes_out; 273 u_int delta_error_counts[CE_NTYPES]; 274 u_long error_counts[CE_NTYPES]; 275 276 struct resource *irqres; 277 struct resource *ioportres; 278 void *cookie; 279 dev_t devs[6]; 280 281 /* 282 * Data area for output buffers. Someday we should build the output 283 * buffer queue without copying data. 284 */ 285 u_char obuf1[256]; 286 u_char obuf2[256]; 287}; 288 289#ifdef COM_ESP 290static int espattach __P((struct com_s *com, Port_t esp_port)); 291#endif 292static int sioattach __P((device_t dev, int rid)); 293static int sio_isa_attach __P((device_t dev)); 294 295static timeout_t siobusycheck; 296static timeout_t siodtrwakeup; 297static void comhardclose __P((struct com_s *com)); 298static void sioinput __P((struct com_s *com)); 299static void siointr1 __P((struct com_s *com)); 300static void siointr __P((void *arg)); 301static int commctl __P((struct com_s *com, int bits, int how)); 302static int comparam __P((struct tty *tp, struct termios *t)); 303static swihand_t siopoll; 304static int sioprobe __P((device_t dev, int xrid)); 305static int sio_isa_probe __P((device_t dev)); 306static void siosettimeout __P((void)); 307static int siosetwater __P((struct com_s *com, speed_t speed)); 308static void comstart __P((struct tty *tp)); 309static void comstop __P((struct tty *tp, int rw)); 310static timeout_t comwakeup; 311static void disc_optim __P((struct tty *tp, struct termios *t, 312 struct com_s *com)); 313 314#if NCARD > 0 315static int sio_pccard_attach __P((device_t dev)); 316static int sio_pccard_detach __P((device_t dev)); 317static int sio_pccard_probe __P((device_t dev)); 318#endif /* NCARD > 0 */ 319 320#if NPCI > 0 321static int sio_pci_attach __P((device_t dev)); 322static void sio_pci_kludge_unit __P((device_t dev)); 323static int sio_pci_probe __P((device_t dev)); 324#endif /* NPCI > 0 */ 325 326static char driver_name[] = "sio"; 327 328/* table and macro for fast conversion from a unit number to its com struct */ 329static devclass_t sio_devclass; 330#define com_addr(unit) ((struct com_s *) \ 331 devclass_get_softc(sio_devclass, unit)) 332 333static device_method_t sio_isa_methods[] = { 334 /* Device interface */ 335 DEVMETHOD(device_probe, sio_isa_probe), 336 DEVMETHOD(device_attach, sio_isa_attach), 337 338 { 0, 0 } 339}; 340 341static driver_t sio_isa_driver = { 342 driver_name, 343 sio_isa_methods, 344 sizeof(struct com_s), 345}; 346 347#if NCARD > 0 348static device_method_t sio_pccard_methods[] = { 349 /* Device interface */ 350 DEVMETHOD(device_probe, sio_pccard_probe), 351 DEVMETHOD(device_attach, sio_pccard_attach), 352 DEVMETHOD(device_detach, sio_pccard_detach), 353 354 { 0, 0 } 355}; 356 357static driver_t sio_pccard_driver = { 358 driver_name, 359 sio_pccard_methods, 360 sizeof(struct com_s), 361}; 362#endif /* NCARD > 0 */ 363 364#if NPCI > 0 365static device_method_t sio_pci_methods[] = { 366 /* Device interface */ 367 DEVMETHOD(device_probe, sio_pci_probe), 368 DEVMETHOD(device_attach, sio_pci_attach), 369 370 { 0, 0 } 371}; 372 373static driver_t sio_pci_driver = { 374 driver_name, 375 sio_pci_methods, 376 sizeof(struct com_s), 377}; 378#endif /* NPCI > 0 */ 379 380static d_open_t sioopen; 381static d_close_t sioclose; 382static d_read_t sioread; 383static d_write_t siowrite; 384static d_ioctl_t sioioctl; 385 386#define CDEV_MAJOR 28 387static struct cdevsw sio_cdevsw = { 388 /* open */ sioopen, 389 /* close */ sioclose, 390 /* read */ sioread, 391 /* write */ siowrite, 392 /* ioctl */ sioioctl, 393 /* poll */ ttypoll, 394 /* mmap */ nommap, 395 /* strategy */ nostrategy, 396 /* name */ driver_name, 397 /* maj */ CDEV_MAJOR, 398 /* dump */ nodump, 399 /* psize */ nopsize, 400 /* flags */ D_TTY, 401 /* bmaj */ -1 402}; 403 404int comconsole = -1; 405static volatile speed_t comdefaultrate = CONSPEED; 406#ifdef __alpha__ 407static volatile speed_t gdbdefaultrate = CONSPEED; 408#endif 409static u_int com_events; /* input chars + weighted output completions */ 410static Port_t siocniobase; 411#ifndef __alpha__ 412static int siocnunit; 413#endif 414static Port_t siogdbiobase; 415static int siogdbunit = -1; 416static bool_t sio_registered; 417static int sio_timeout; 418static int sio_timeouts_until_log; 419static struct callout_handle sio_timeout_handle 420 = CALLOUT_HANDLE_INITIALIZER(&sio_timeout_handle); 421static int sio_numunits; 422 423static struct speedtab comspeedtab[] = { 424 { 0, 0 }, 425 { 50, COMBRD(50) }, 426 { 75, COMBRD(75) }, 427 { 110, COMBRD(110) }, 428 { 134, COMBRD(134) }, 429 { 150, COMBRD(150) }, 430 { 200, COMBRD(200) }, 431 { 300, COMBRD(300) }, 432 { 600, COMBRD(600) }, 433 { 1200, COMBRD(1200) }, 434 { 1800, COMBRD(1800) }, 435 { 2400, COMBRD(2400) }, 436 { 4800, COMBRD(4800) }, 437 { 9600, COMBRD(9600) }, 438 { 19200, COMBRD(19200) }, 439 { 38400, COMBRD(38400) }, 440 { 57600, COMBRD(57600) }, 441 { 115200, COMBRD(115200) }, 442 { -1, -1 } 443}; 444 445#ifdef COM_ESP 446/* XXX configure this properly. */ 447static Port_t likely_com_ports[] = { 0x3f8, 0x2f8, 0x3e8, 0x2e8, }; 448static Port_t likely_esp_ports[] = { 0x140, 0x180, 0x280, 0 }; 449#endif 450 451/* 452 * handle sysctl read/write requests for console speed 453 * 454 * In addition to setting comdefaultrate for I/O through /dev/console, 455 * also set the initial and lock values for the /dev/ttyXX device 456 * if there is one associated with the console. Finally, if the /dev/tty 457 * device has already been open, change the speed on the open running port 458 * itself. 459 */ 460 461static int 462sysctl_machdep_comdefaultrate(SYSCTL_HANDLER_ARGS) 463{ 464 int error, s; 465 speed_t newspeed; 466 struct com_s *com; 467 struct tty *tp; 468 469 newspeed = comdefaultrate; 470 471 error = sysctl_handle_opaque(oidp, &newspeed, sizeof newspeed, req); 472 if (error || !req->newptr) 473 return (error); 474 475 comdefaultrate = newspeed; 476 477 if (comconsole < 0) /* serial console not selected? */ 478 return (0); 479 480 com = com_addr(comconsole); 481 if (com == NULL) 482 return (ENXIO); 483 484 /* 485 * set the initial and lock rates for /dev/ttydXX and /dev/cuaXX 486 * (note, the lock rates really are boolean -- if non-zero, disallow 487 * speed changes) 488 */ 489 com->it_in.c_ispeed = com->it_in.c_ospeed = 490 com->lt_in.c_ispeed = com->lt_in.c_ospeed = 491 com->it_out.c_ispeed = com->it_out.c_ospeed = 492 com->lt_out.c_ispeed = com->lt_out.c_ospeed = comdefaultrate; 493 494 /* 495 * if we're open, change the running rate too 496 */ 497 tp = com->tp; 498 if (tp && (tp->t_state & TS_ISOPEN)) { 499 tp->t_termios.c_ispeed = 500 tp->t_termios.c_ospeed = comdefaultrate; 501 s = spltty(); 502 error = comparam(tp, &tp->t_termios); 503 splx(s); 504 } 505 return error; 506} 507 508SYSCTL_PROC(_machdep, OID_AUTO, conspeed, CTLTYPE_INT | CTLFLAG_RW, 509 0, 0, sysctl_machdep_comdefaultrate, "I", ""); 510 511#define SET_FLAG(dev, bit) device_set_flags(dev, device_get_flags(dev) | (bit)) 512#define CLR_FLAG(dev, bit) device_set_flags(dev, device_get_flags(dev) & ~(bit)) 513 514#if NCARD > 0 515static int 516sio_pccard_probe(dev) 517 device_t dev; 518{ 519 /* Do not probe IRQ - pccard doesn't turn on the interrupt line */ 520 /* until bus_setup_intr */ 521 SET_FLAG(dev, COM_C_NOPROBE); 522 523 return (sioprobe(dev, 0)); 524} 525 526static int 527sio_pccard_attach(dev) 528 device_t dev; 529{ 530 return (sioattach(dev, 0)); 531} 532 533/* 534 * sio_detach - unload the driver and clear the table. 535 * XXX TODO: 536 * This is usually called when the card is ejected, but 537 * can be caused by a modunload of a controller driver. 538 * The idea is to reset the driver's view of the device 539 * and ensure that any driver entry points such as 540 * read and write do not hang. 541 */ 542static int 543sio_pccard_detach(dev) 544 device_t dev; 545{ 546 struct com_s *com; 547 int i; 548 549 com = (struct com_s *) device_get_softc(dev); 550 if (com == NULL) { 551 device_printf(dev, "NULL com in siounload\n"); 552 return (0); 553 } 554 com->gone = 1; 555 for (i = 0 ; i < 6; i++) 556 destroy_dev(com->devs[i]); 557 if (com->irqres) { 558 bus_teardown_intr(dev, com->irqres, com->cookie); 559 bus_release_resource(dev, SYS_RES_IRQ, 0, com->irqres); 560 } 561 if (com->ioportres) 562 bus_release_resource(dev, SYS_RES_IOPORT, 0, com->ioportres); 563 if (com->tp && (com->tp->t_state & TS_ISOPEN)) { 564 device_printf(dev, "still open, forcing close\n"); 565 com->tp->t_gen++; 566 ttyclose(com->tp); 567 ttwakeup(com->tp); 568 ttwwakeup(com->tp); 569 } else { 570 if (com->ibuf != NULL) 571 free(com->ibuf, M_DEVBUF); 572 } 573 device_printf(dev, "unloaded\n"); 574 return (0); 575} 576#endif /* NCARD > 0 */ 577 578#if NPCI > 0 579struct pci_ids { 580 u_int32_t type; 581 const char *desc; 582 int rid; 583}; 584 585static struct pci_ids pci_ids[] = { 586 { 0x100812b9, "3COM PCI FaxModem", 0x10 }, 587 { 0x048011c1, "ActionTec 56k FAX PCI Modem", 0x14 }, 588 { 0x00000000, NULL, 0 } 589}; 590 591static int 592sio_pci_attach(dev) 593 device_t dev; 594{ 595 u_int32_t type; 596 struct pci_ids *id; 597 598 type = pci_get_devid(dev); 599 id = pci_ids; 600 while (id->type && id->type != type) 601 id++; 602 if (id->desc == NULL) 603 return (ENXIO); 604 sio_pci_kludge_unit(dev); 605 return (sioattach(dev, id->rid)); 606} 607 608/* 609 * Don't cut and paste this to other drivers. It is a horrible kludge 610 * which will fail to work and also be unnecessary in future versions. 611 */ 612static void 613sio_pci_kludge_unit(dev) 614 device_t dev; 615{ 616 devclass_t dc; 617 int err; 618 int start; 619 int unit; 620 621 unit = 0; 622 start = 0; 623 while (resource_int_value("sio", unit, "port", &start) == 0 && 624 start > 0) 625 unit++; 626 if (device_get_unit(dev) < unit) { 627 dc = device_get_devclass(dev); 628 while (devclass_get_device(dc, unit)) 629 unit++; 630 device_printf(dev, "moving to sio%d\n", unit); 631 err = device_set_unit(dev, unit); /* EVIL DO NOT COPY */ 632 if (err) 633 device_printf(dev, "error moving device %d\n", err); 634 } 635} 636 637static int 638sio_pci_probe(dev) 639 device_t dev; 640{ 641 u_int32_t type; 642 struct pci_ids *id; 643 644 type = pci_get_devid(dev); 645 id = pci_ids; 646 while (id->type && id->type != type) 647 id++; 648 if (id->desc == NULL) 649 return (ENXIO); 650 device_set_desc(dev, id->desc); 651 return (sioprobe(dev, id->rid)); 652} 653#endif /* NPCI > 0 */ 654 655static struct isa_pnp_id sio_ids[] = { 656 {0x0005d041, "Standard PC COM port"}, /* PNP0500 */ 657 {0x0105d041, "16550A-compatible COM port"}, /* PNP0501 */ 658 {0x0205d041, "Multiport serial device (non-intelligent 16550)"}, /* PNP0502 */ 659 {0x1005d041, "Generic IRDA-compatible device"}, /* PNP0510 */ 660 {0x1105d041, "Generic IRDA-compatible device"}, /* PNP0511 */ 661 /* Devices that do not have a compatid */ 662 {0x12206804, NULL}, /* ACH2012 - 5634BTS 56K Video Ready Modem */ 663 {0x7602a904, NULL}, /* AEI0276 - 56K v.90 Fax Modem (LKT) */ 664 {0x00007905, NULL}, /* AKY0000 - 56K Plug&Play Modem */ 665 {0x01405407, NULL}, /* AZT4001 - AZT3000 PnP SOUND DEVICE, MODEM */ 666 {0x56039008, NULL}, /* BDP0356 - Best Data 56x2 */ 667 {0x36339008, NULL}, /* BDP3336 - Best Data Prods. 336F */ 668 {0x0014490a, NULL}, /* BRI1400 - Boca 33.6 PnP */ 669 {0x0015490a, NULL}, /* BRI1500 - Internal Fax Data */ 670 {0x0034490a, NULL}, /* BRI3400 - Internal ACF Modem */ 671 {0x0094490a, NULL}, /* BRI9400 - Boca K56Flex PnP */ 672 {0x00b4490a, NULL}, /* BRIB400 - Boca 56k PnP */ 673 {0x0030320d, NULL}, /* CIR3000 - Cirrus Logic V43 */ 674 {0x0100440e, NULL}, /* CRD0001 - Cardinal MVP288IV ? */ 675 {0x36033610, NULL}, /* DAV0336 - DAVICOM 336PNP MODEM */ 676 {0x0000aa1a, NULL}, /* FUJ0000 - FUJITSU Modem 33600 PNP/I2 */ 677 {0x1200c31e, NULL}, /* GVC0012 - VF1128HV-R9 (win modem?) */ 678 {0x0303c31e, NULL}, /* GVC0303 - MaxTech 33.6 PnP D/F/V */ 679 {0x0505c31e, NULL}, /* GVC0505 - GVC 56k Faxmodem */ 680 {0x0050c31e, NULL}, /* GVC5000 - some GVC modem */ 681 {0x3800f91e, NULL}, /* GWY0038 - Telepath with v.90 */ 682 {0x9062f91e, NULL}, /* GWY6290 - Telepath with x2 Technology */ 683 {0x0000f435, NULL}, /* MOT0000 - Motorola ModemSURFR 33.6 Intern */ 684 {0x5015f435, NULL}, /* MOT1550 - Motorola ModemSURFR 56K Modem */ 685 {0xf015f435, NULL}, /* MOT15F0 - Motorola VoiceSURFR 56K Modem */ 686 {0x6045f435, NULL}, /* MOT4560 - Motorola ? */ 687 {0x61e7a338, NULL}, /* NECE761 - 33.6Modem */ 688 {0x0f804f3f, NULL}, /* OZO800f - Zoom 2812 (56k Modem) */ 689 {0x39804f3f, NULL}, /* OZO8039 - Zoom 56k flex */ 690 {0x3024a341, NULL}, /* PMC2430 - Pace 56 Voice Internal Modem */ 691 {0x1000eb49, NULL}, /* ROK0010 - Rockwell ? */ 692 {0x5002734a, NULL}, /* RSS0250 - 5614Jx3(G) Internal Modem */ 693 {0x6202734a, NULL}, /* RSS0262 - 5614Jx3[G] V90+K56Flex Modem */ 694 {0xc100ad4d, NULL}, /* SMM00C1 - Leopard 56k PnP */ 695 {0x9012b04e, NULL}, /* SUP1290 - Supra ? */ 696 {0x1013b04e, NULL}, /* SUP1310 - SupraExpress 336i PnP */ 697 {0x8013b04e, NULL}, /* SUP1380 - SupraExpress 288i PnP Voice */ 698 {0x8113b04e, NULL}, /* SUP1381 - SupraExpress 336i PnP Voice */ 699 {0x5016b04e, NULL}, /* SUP1650 - Supra 336i Sp Intl */ 700 {0x7016b04e, NULL}, /* SUP1670 - Supra 336i V+ Intl */ 701 {0x7420b04e, NULL}, /* SUP2070 - Supra ? */ 702 {0x8020b04e, NULL}, /* SUP2080 - Supra ? */ 703 {0x8420b04e, NULL}, /* SUP2084 - SupraExpress 56i PnP */ 704 {0x7121b04e, NULL}, /* SUP2171 - SupraExpress 56i Sp? */ 705 {0x8024b04e, NULL}, /* SUP2480 - Supra ? */ 706 {0x01007256, NULL}, /* USR0001 - U.S. Robotics Inc., Sportster W */ 707 {0x02007256, NULL}, /* USR0002 - U.S. Robotics Inc. Sportster 33. */ 708 {0x04007256, NULL}, /* USR0004 - USR Sportster 14.4k */ 709 {0x06007256, NULL}, /* USR0006 - USR Sportster 33.6k */ 710 {0x11007256, NULL}, /* USR0011 - USR ? */ 711 {0x01017256, NULL}, /* USR0101 - USR ? */ 712 {0x30207256, NULL}, /* USR2030 - U.S.Robotics Inc. Sportster 560 */ 713 {0x50207256, NULL}, /* USR2050 - U.S.Robotics Inc. Sportster 33. */ 714 {0x70207256, NULL}, /* USR2070 - U.S.Robotics Inc. Sportster 560 */ 715 {0x30307256, NULL}, /* USR3030 - U.S. Robotics 56K FAX INT */ 716 {0x31307256, NULL}, /* USR3031 - U.S. Robotics 56K FAX INT */ 717 {0x50307256, NULL}, /* USR3050 - U.S. Robotics 56K FAX INT */ 718 {0x70307256, NULL}, /* USR3070 - U.S. Robotics 56K Voice INT */ 719 {0x90307256, NULL}, /* USR3090 - USR ? */ 720 {0x70917256, NULL}, /* USR9170 - U.S. Robotics 56K FAX INT */ 721 {0x90917256, NULL}, /* USR9190 - USR 56k Voice INT */ 722 {0x0300695c, NULL}, /* WCI0003 - Fax/Voice/Modem/Speakphone/Asvd */ 723 {0x01a0896a, NULL}, /* ZTIA001 - Zoom Internal V90 Faxmodem */ 724 {0x61f7896a, NULL}, /* ZTIF761 - Zoom ComStar 33.6 */ 725 {0} 726}; 727 728 729 730static int 731sio_isa_probe(dev) 732 device_t dev; 733{ 734 /* Check isapnp ids */ 735 if (ISA_PNP_PROBE(device_get_parent(dev), dev, sio_ids) == ENXIO) 736 return (ENXIO); 737 return (sioprobe(dev, 0)); 738} 739 740static int 741sioprobe(dev, xrid) 742 device_t dev; 743 int xrid; 744{ 745#if 0 746 static bool_t already_init; 747 device_t xdev; 748#endif 749 struct com_s *com; 750 bool_t failures[10]; 751 int fn; 752 device_t idev; 753 Port_t iobase; 754 intrmask_t irqmap[4]; 755 intrmask_t irqs; 756 u_char mcr_image; 757 int result; 758 u_long xirq; 759 u_int flags = device_get_flags(dev); 760 int rid; 761 struct resource *port; 762 int intrsave; 763 764 rid = xrid; 765 port = bus_alloc_resource(dev, SYS_RES_IOPORT, &rid, 766 0, ~0, IO_COMSIZE, RF_ACTIVE); 767 if (!port) 768 return (ENXIO); 769 770 com = device_get_softc(dev); 771 com->bst = rman_get_bustag(port); 772 com->bsh = rman_get_bushandle(port); 773 774#if 0 775 /* 776 * XXX this is broken - when we are first called, there are no 777 * previously configured IO ports. We could hard code 778 * 0x3f8, 0x2f8, 0x3e8, 0x2e8 etc but that's probably worse. 779 * This code has been doing nothing since the conversion since 780 * "count" is zero the first time around. 781 */ 782 if (!already_init) { 783 /* 784 * Turn off MCR_IENABLE for all likely serial ports. An unused 785 * port with its MCR_IENABLE gate open will inhibit interrupts 786 * from any used port that shares the interrupt vector. 787 * XXX the gate enable is elsewhere for some multiports. 788 */ 789 device_t *devs; 790 int count, i, xioport; 791 792 devclass_get_devices(sio_devclass, &devs, &count); 793 for (i = 0; i < count; i++) { 794 xdev = devs[i]; 795 if (device_is_enabled(xdev) && 796 bus_get_resource(xdev, SYS_RES_IOPORT, 0, &xioport, 797 NULL) == 0) 798 outb(xioport + com_mcr, 0); 799 } 800 free(devs, M_TEMP); 801 already_init = TRUE; 802 } 803#endif 804 805 if (COM_LLCONSOLE(flags)) { 806 printf("sio%d: reserved for low-level i/o\n", 807 device_get_unit(dev)); 808 bus_release_resource(dev, SYS_RES_IOPORT, rid, port); 809 return (ENXIO); 810 } 811 812 /* 813 * If the device is on a multiport card and has an AST/4 814 * compatible interrupt control register, initialize this 815 * register and prepare to leave MCR_IENABLE clear in the mcr. 816 * Otherwise, prepare to set MCR_IENABLE in the mcr. 817 * Point idev to the device struct giving the correct id_irq. 818 * This is the struct for the master device if there is one. 819 */ 820 idev = dev; 821 mcr_image = MCR_IENABLE; 822#ifdef COM_MULTIPORT 823 if (COM_ISMULTIPORT(flags)) { 824 Port_t xiobase; 825 u_long io; 826 827 idev = devclass_get_device(sio_devclass, COM_MPMASTER(flags)); 828 if (idev == NULL) { 829 printf("sio%d: master device %d not configured\n", 830 device_get_unit(dev), COM_MPMASTER(flags)); 831 idev = dev; 832 } 833 if (!COM_NOTAST4(flags)) { 834 if (bus_get_resource(idev, SYS_RES_IOPORT, 0, &io, 835 NULL) == 0) { 836 xiobase = io; 837 if (bus_get_resource(idev, SYS_RES_IRQ, 0, 838 NULL, NULL) == 0) 839 outb(xiobase + com_scr, 0x80); 840 else 841 outb(xiobase + com_scr, 0); 842 } 843 mcr_image = 0; 844 } 845 } 846#endif /* COM_MULTIPORT */ 847 if (bus_get_resource(idev, SYS_RES_IRQ, 0, NULL, NULL) != 0) 848 mcr_image = 0; 849 850 bzero(failures, sizeof failures); 851 iobase = rman_get_start(port); 852 853 /* 854 * We don't want to get actual interrupts, just masked ones. 855 * Interrupts from this line should already be masked in the ICU, 856 * but mask them in the processor as well in case there are some 857 * (misconfigured) shared interrupts. 858 */ 859 intrsave = save_intr(); 860 disable_intr(); 861 COM_LOCK(); 862/* EXTRA DELAY? */ 863 864 /* 865 * Initialize the speed and the word size and wait long enough to 866 * drain the maximum of 16 bytes of junk in device output queues. 867 * The speed is undefined after a master reset and must be set 868 * before relying on anything related to output. There may be 869 * junk after a (very fast) soft reboot and (apparently) after 870 * master reset. 871 * XXX what about the UART bug avoided by waiting in comparam()? 872 * We don't want to to wait long enough to drain at 2 bps. 873 */ 874 if (iobase == siocniobase) 875 DELAY((16 + 1) * 1000000 / (comdefaultrate / 10)); 876 else { 877 sio_setreg(com, com_cfcr, CFCR_DLAB | CFCR_8BITS); 878 sio_setreg(com, com_dlbl, COMBRD(SIO_TEST_SPEED) & 0xff); 879 sio_setreg(com, com_dlbh, (u_int) COMBRD(SIO_TEST_SPEED) >> 8); 880 sio_setreg(com, com_cfcr, CFCR_8BITS); 881 DELAY((16 + 1) * 1000000 / (SIO_TEST_SPEED / 10)); 882 } 883 884 /* 885 * Enable the interrupt gate and disable device interupts. This 886 * should leave the device driving the interrupt line low and 887 * guarantee an edge trigger if an interrupt can be generated. 888 */ 889/* EXTRA DELAY? */ 890 sio_setreg(com, com_mcr, mcr_image); 891 sio_setreg(com, com_ier, 0); 892 DELAY(1000); /* XXX */ 893 irqmap[0] = isa_irq_pending(); 894 895 /* 896 * Attempt to set loopback mode so that we can send a null byte 897 * without annoying any external device. 898 */ 899/* EXTRA DELAY? */ 900 sio_setreg(com, com_mcr, mcr_image | MCR_LOOPBACK); 901 902 /* 903 * Attempt to generate an output interrupt. On 8250's, setting 904 * IER_ETXRDY generates an interrupt independent of the current 905 * setting and independent of whether the THR is empty. On 16450's, 906 * setting IER_ETXRDY generates an interrupt independent of the 907 * current setting. On 16550A's, setting IER_ETXRDY only 908 * generates an interrupt when IER_ETXRDY is not already set. 909 */ 910 sio_setreg(com, com_ier, IER_ETXRDY); 911 912 /* 913 * On some 16x50 incompatibles, setting IER_ETXRDY doesn't generate 914 * an interrupt. They'd better generate one for actually doing 915 * output. Loopback may be broken on the same incompatibles but 916 * it's unlikely to do more than allow the null byte out. 917 */ 918 sio_setreg(com, com_data, 0); 919 DELAY((1 + 2) * 1000000 / (SIO_TEST_SPEED / 10)); 920 921 /* 922 * Turn off loopback mode so that the interrupt gate works again 923 * (MCR_IENABLE was hidden). This should leave the device driving 924 * an interrupt line high. It doesn't matter if the interrupt 925 * line oscillates while we are not looking at it, since interrupts 926 * are disabled. 927 */ 928/* EXTRA DELAY? */ 929 sio_setreg(com, com_mcr, mcr_image); 930 931 /* 932 * Some pcmcia cards have the "TXRDY bug", so we check everyone 933 * for IIR_TXRDY implementation ( Palido 321s, DC-1S... ) 934 */ 935 if (COM_NOPROBE(flags)) { 936 /* Reading IIR register twice */ 937 for (fn = 0; fn < 2; fn ++) { 938 DELAY(10000); 939 failures[6] = sio_getreg(com, com_iir); 940 } 941 /* Check IIR_TXRDY clear ? */ 942 result = 0; 943 if (failures[6] & IIR_TXRDY) { 944 /* Nop, Double check with clearing IER */ 945 sio_setreg(com, com_ier, 0); 946 if (sio_getreg(com, com_iir) & IIR_NOPEND) { 947 /* Ok. we're familia this gang */ 948 SET_FLAG(dev, COM_C_IIR_TXRDYBUG); 949 } else { 950 /* Unknown, Just omit this chip.. XXX */ 951 result = ENXIO; 952 } 953 } else { 954 /* OK. this is well-known guys */ 955 CLR_FLAG(dev, COM_C_IIR_TXRDYBUG); 956 } 957 sio_setreg(com, com_cfcr, CFCR_8BITS); 958 COM_UNLOCK(); 959 restore_intr(intrsave); 960 bus_release_resource(dev, SYS_RES_IOPORT, rid, port); 961 return (iobase == siocniobase ? 0 : result); 962 } 963 964 /* 965 * Check that 966 * o the CFCR, IER and MCR in UART hold the values written to them 967 * (the values happen to be all distinct - this is good for 968 * avoiding false positive tests from bus echoes). 969 * o an output interrupt is generated and its vector is correct. 970 * o the interrupt goes away when the IIR in the UART is read. 971 */ 972/* EXTRA DELAY? */ 973 failures[0] = sio_getreg(com, com_cfcr) - CFCR_8BITS; 974 failures[1] = sio_getreg(com, com_ier) - IER_ETXRDY; 975 failures[2] = sio_getreg(com, com_mcr) - mcr_image; 976 DELAY(10000); /* Some internal modems need this time */ 977 irqmap[1] = isa_irq_pending(); 978 failures[4] = (sio_getreg(com, com_iir) & IIR_IMASK) - IIR_TXRDY; 979 DELAY(1000); /* XXX */ 980 irqmap[2] = isa_irq_pending(); 981 failures[6] = (sio_getreg(com, com_iir) & IIR_IMASK) - IIR_NOPEND; 982 983 /* 984 * Turn off all device interrupts and check that they go off properly. 985 * Leave MCR_IENABLE alone. For ports without a master port, it gates 986 * the OUT2 output of the UART to 987 * the ICU input. Closing the gate would give a floating ICU input 988 * (unless there is another device driving it) and spurious interrupts. 989 * (On the system that this was first tested on, the input floats high 990 * and gives a (masked) interrupt as soon as the gate is closed.) 991 */ 992 sio_setreg(com, com_ier, 0); 993 sio_setreg(com, com_cfcr, CFCR_8BITS); /* dummy to avoid bus echo */ 994 failures[7] = sio_getreg(com, com_ier); 995 DELAY(1000); /* XXX */ 996 irqmap[3] = isa_irq_pending(); 997 failures[9] = (sio_getreg(com, com_iir) & IIR_IMASK) - IIR_NOPEND; 998 999 COM_UNLOCK(); 1000 restore_intr(intrsave); 1001 1002 irqs = irqmap[1] & ~irqmap[0]; 1003 if (bus_get_resource(idev, SYS_RES_IRQ, 0, &xirq, NULL) == 0 && 1004 ((1 << xirq) & irqs) == 0) 1005 printf( 1006 "sio%d: configured irq %ld not in bitmap of probed irqs %#x\n", 1007 device_get_unit(dev), xirq, irqs); 1008 if (bootverbose) 1009 printf("sio%d: irq maps: %#x %#x %#x %#x\n", 1010 device_get_unit(dev), 1011 irqmap[0], irqmap[1], irqmap[2], irqmap[3]); 1012 1013 result = 0; 1014 for (fn = 0; fn < sizeof failures; ++fn) 1015 if (failures[fn]) { 1016 sio_setreg(com, com_mcr, 0); 1017 result = ENXIO; 1018 if (bootverbose) { 1019 printf("sio%d: probe failed test(s):", 1020 device_get_unit(dev)); 1021 for (fn = 0; fn < sizeof failures; ++fn) 1022 if (failures[fn]) 1023 printf(" %d", fn); 1024 printf("\n"); 1025 } 1026 break; 1027 } 1028 bus_release_resource(dev, SYS_RES_IOPORT, rid, port); 1029 return (iobase == siocniobase ? 0 : result); 1030} 1031 1032#ifdef COM_ESP 1033static int 1034espattach(com, esp_port) 1035 struct com_s *com; 1036 Port_t esp_port; 1037{ 1038 u_char dips; 1039 u_char val; 1040 1041 /* 1042 * Check the ESP-specific I/O port to see if we're an ESP 1043 * card. If not, return failure immediately. 1044 */ 1045 if ((inb(esp_port) & 0xf3) == 0) { 1046 printf(" port 0x%x is not an ESP board?\n", esp_port); 1047 return (0); 1048 } 1049 1050 /* 1051 * We've got something that claims to be a Hayes ESP card. 1052 * Let's hope so. 1053 */ 1054 1055 /* Get the dip-switch configuration */ 1056 outb(esp_port + ESP_CMD1, ESP_GETDIPS); 1057 dips = inb(esp_port + ESP_STATUS1); 1058 1059 /* 1060 * Bits 0,1 of dips say which COM port we are. 1061 */ 1062 if (rman_get_start(com->ioportres) == likely_com_ports[dips & 0x03]) 1063 printf(" : ESP"); 1064 else { 1065 printf(" esp_port has com %d\n", dips & 0x03); 1066 return (0); 1067 } 1068 1069 /* 1070 * Check for ESP version 2.0 or later: bits 4,5,6 = 010. 1071 */ 1072 outb(esp_port + ESP_CMD1, ESP_GETTEST); 1073 val = inb(esp_port + ESP_STATUS1); /* clear reg 1 */ 1074 val = inb(esp_port + ESP_STATUS2); 1075 if ((val & 0x70) < 0x20) { 1076 printf("-old (%o)", val & 0x70); 1077 return (0); 1078 } 1079 1080 /* 1081 * Check for ability to emulate 16550: bit 7 == 1 1082 */ 1083 if ((dips & 0x80) == 0) { 1084 printf(" slave"); 1085 return (0); 1086 } 1087 1088 /* 1089 * Okay, we seem to be a Hayes ESP card. Whee. 1090 */ 1091 com->esp = TRUE; 1092 com->esp_port = esp_port; 1093 return (1); 1094} 1095#endif /* COM_ESP */ 1096 1097static int 1098sio_isa_attach(dev) 1099 device_t dev; 1100{ 1101 return (sioattach(dev, 0)); 1102} 1103 1104static int 1105sioattach(dev, xrid) 1106 device_t dev; 1107 int xrid; 1108{ 1109 struct com_s *com; 1110#ifdef COM_ESP 1111 Port_t *espp; 1112#endif 1113 Port_t iobase; 1114 int unit; 1115 u_int flags; 1116 int rid; 1117 struct resource *port; 1118 int ret; 1119 int intrstate; 1120 1121 rid = xrid; 1122 port = bus_alloc_resource(dev, SYS_RES_IOPORT, &rid, 1123 0, ~0, IO_COMSIZE, RF_ACTIVE); 1124 if (!port) 1125 return (ENXIO); 1126 1127 iobase = rman_get_start(port); 1128 unit = device_get_unit(dev); 1129 com = device_get_softc(dev); 1130 flags = device_get_flags(dev); 1131 1132 if (unit >= sio_numunits) 1133 sio_numunits = unit + 1; 1134 /* 1135 * sioprobe() has initialized the device registers as follows: 1136 * o cfcr = CFCR_8BITS. 1137 * It is most important that CFCR_DLAB is off, so that the 1138 * data port is not hidden when we enable interrupts. 1139 * o ier = 0. 1140 * Interrupts are only enabled when the line is open. 1141 * o mcr = MCR_IENABLE, or 0 if the port has AST/4 compatible 1142 * interrupt control register or the config specifies no irq. 1143 * Keeping MCR_DTR and MCR_RTS off might stop the external 1144 * device from sending before we are ready. 1145 */ 1146 bzero(com, sizeof *com); 1147 com->unit = unit; 1148 com->ioportres = port; 1149 com->bst = rman_get_bustag(port); 1150 com->bsh = rman_get_bushandle(port); 1151 com->cfcr_image = CFCR_8BITS; 1152 com->dtr_wait = 3 * hz; 1153 com->loses_outints = COM_LOSESOUTINTS(flags) != 0; 1154 com->no_irq = bus_get_resource(dev, SYS_RES_IRQ, 0, NULL, NULL) != 0; 1155 com->tx_fifo_size = 1; 1156 com->obufs[0].l_head = com->obuf1; 1157 com->obufs[1].l_head = com->obuf2; 1158 1159 com->data_port = iobase + com_data; 1160 com->int_id_port = iobase + com_iir; 1161 com->modem_ctl_port = iobase + com_mcr; 1162 com->mcr_image = inb(com->modem_ctl_port); 1163 com->line_status_port = iobase + com_lsr; 1164 com->modem_status_port = iobase + com_msr; 1165 com->intr_ctl_port = iobase + com_ier; 1166 1167 /* 1168 * We don't use all the flags from <sys/ttydefaults.h> since they 1169 * are only relevant for logins. It's important to have echo off 1170 * initially so that the line doesn't start blathering before the 1171 * echo flag can be turned off. 1172 */ 1173 com->it_in.c_iflag = 0; 1174 com->it_in.c_oflag = 0; 1175 com->it_in.c_cflag = TTYDEF_CFLAG; 1176 com->it_in.c_lflag = 0; 1177 if (unit == comconsole) { 1178 com->it_in.c_iflag = TTYDEF_IFLAG; 1179 com->it_in.c_oflag = TTYDEF_OFLAG; 1180 com->it_in.c_cflag = TTYDEF_CFLAG | CLOCAL; 1181 com->it_in.c_lflag = TTYDEF_LFLAG; 1182 com->lt_out.c_cflag = com->lt_in.c_cflag = CLOCAL; 1183 com->lt_out.c_ispeed = com->lt_out.c_ospeed = 1184 com->lt_in.c_ispeed = com->lt_in.c_ospeed = 1185 com->it_in.c_ispeed = com->it_in.c_ospeed = comdefaultrate; 1186 } else 1187 com->it_in.c_ispeed = com->it_in.c_ospeed = TTYDEF_SPEED; 1188 intrstate = save_intr(); 1189 if (siosetwater(com, com->it_in.c_ispeed) != 0) { 1190 COM_UNLOCK(); 1191 restore_intr(intrstate); 1192 /* 1193 * Leave i/o resources allocated if this is a `cn'-level 1194 * console, so that other devices can't snarf them. 1195 */ 1196 if (iobase != siocniobase) 1197 bus_release_resource(dev, SYS_RES_IOPORT, rid, port); 1198 return (ENOMEM); 1199 } 1200 COM_UNLOCK(); 1201 restore_intr(intrstate); 1202 termioschars(&com->it_in); 1203 com->it_out = com->it_in; 1204 1205 /* attempt to determine UART type */ 1206 printf("sio%d: type", unit); 1207 1208 1209#ifdef COM_MULTIPORT 1210 if (!COM_ISMULTIPORT(flags) && !COM_IIR_TXRDYBUG(flags)) 1211#else 1212 if (!COM_IIR_TXRDYBUG(flags)) 1213#endif 1214 { 1215 u_char scr; 1216 u_char scr1; 1217 u_char scr2; 1218 1219 scr = sio_getreg(com, com_scr); 1220 sio_setreg(com, com_scr, 0xa5); 1221 scr1 = sio_getreg(com, com_scr); 1222 sio_setreg(com, com_scr, 0x5a); 1223 scr2 = sio_getreg(com, com_scr); 1224 sio_setreg(com, com_scr, scr); 1225 if (scr1 != 0xa5 || scr2 != 0x5a) { 1226 printf(" 8250"); 1227 goto determined_type; 1228 } 1229 } 1230 sio_setreg(com, com_fifo, FIFO_ENABLE | FIFO_RX_HIGH); 1231 DELAY(100); 1232 com->st16650a = 0; 1233 switch (inb(com->int_id_port) & IIR_FIFO_MASK) { 1234 case FIFO_RX_LOW: 1235 printf(" 16450"); 1236 break; 1237 case FIFO_RX_MEDL: 1238 printf(" 16450?"); 1239 break; 1240 case FIFO_RX_MEDH: 1241 printf(" 16550?"); 1242 break; 1243 case FIFO_RX_HIGH: 1244 if (COM_NOFIFO(flags)) { 1245 printf(" 16550A fifo disabled"); 1246 } else { 1247 com->hasfifo = TRUE; 1248 if (COM_ST16650A(flags)) { 1249 com->st16650a = 1; 1250 com->tx_fifo_size = 32; 1251 printf(" ST16650A"); 1252 } else { 1253 com->tx_fifo_size = COM_FIFOSIZE(flags); 1254 printf(" 16550A"); 1255 } 1256 } 1257#ifdef COM_ESP 1258 for (espp = likely_esp_ports; *espp != 0; espp++) 1259 if (espattach(com, *espp)) { 1260 com->tx_fifo_size = 1024; 1261 break; 1262 } 1263#endif 1264 if (!com->st16650a) { 1265 if (!com->tx_fifo_size) 1266 com->tx_fifo_size = 16; 1267 else 1268 printf(" lookalike with %d bytes FIFO", 1269 com->tx_fifo_size); 1270 } 1271 1272 break; 1273 } 1274 1275#ifdef COM_ESP 1276 if (com->esp) { 1277 /* 1278 * Set 16550 compatibility mode. 1279 * We don't use the ESP_MODE_SCALE bit to increase the 1280 * fifo trigger levels because we can't handle large 1281 * bursts of input. 1282 * XXX flow control should be set in comparam(), not here. 1283 */ 1284 outb(com->esp_port + ESP_CMD1, ESP_SETMODE); 1285 outb(com->esp_port + ESP_CMD2, ESP_MODE_RTS | ESP_MODE_FIFO); 1286 1287 /* Set RTS/CTS flow control. */ 1288 outb(com->esp_port + ESP_CMD1, ESP_SETFLOWTYPE); 1289 outb(com->esp_port + ESP_CMD2, ESP_FLOW_RTS); 1290 outb(com->esp_port + ESP_CMD2, ESP_FLOW_CTS); 1291 1292 /* Set flow-control levels. */ 1293 outb(com->esp_port + ESP_CMD1, ESP_SETRXFLOW); 1294 outb(com->esp_port + ESP_CMD2, HIBYTE(768)); 1295 outb(com->esp_port + ESP_CMD2, LOBYTE(768)); 1296 outb(com->esp_port + ESP_CMD2, HIBYTE(512)); 1297 outb(com->esp_port + ESP_CMD2, LOBYTE(512)); 1298 } 1299#endif /* COM_ESP */ 1300 sio_setreg(com, com_fifo, 0); 1301determined_type: ; 1302 1303#ifdef COM_MULTIPORT 1304 if (COM_ISMULTIPORT(flags)) { 1305 device_t masterdev; 1306 1307 com->multiport = TRUE; 1308 printf(" (multiport"); 1309 if (unit == COM_MPMASTER(flags)) 1310 printf(" master"); 1311 printf(")"); 1312 masterdev = devclass_get_device(sio_devclass, 1313 COM_MPMASTER(flags)); 1314 com->no_irq = (masterdev == NULL || bus_get_resource(masterdev, 1315 SYS_RES_IRQ, 0, NULL, NULL) != 0); 1316 } 1317#endif /* COM_MULTIPORT */ 1318 if (unit == comconsole) 1319 printf(", console"); 1320 if (COM_IIR_TXRDYBUG(flags)) 1321 printf(" with a bogus IIR_TXRDY register"); 1322 printf("\n"); 1323 1324 if (!sio_registered) { 1325 register_swi(SWI_TTY, siopoll); 1326 sio_registered = TRUE; 1327 } 1328 com->devs[0] = make_dev(&sio_cdevsw, unit, 1329 UID_ROOT, GID_WHEEL, 0600, "ttyd%r", unit); 1330 com->devs[1] = make_dev(&sio_cdevsw, unit | CONTROL_INIT_STATE, 1331 UID_ROOT, GID_WHEEL, 0600, "ttyid%r", unit); 1332 com->devs[2] = make_dev(&sio_cdevsw, unit | CONTROL_LOCK_STATE, 1333 UID_ROOT, GID_WHEEL, 0600, "ttyld%r", unit); 1334 com->devs[3] = make_dev(&sio_cdevsw, unit | CALLOUT_MASK, 1335 UID_UUCP, GID_DIALER, 0660, "cuaa%r", unit); 1336 com->devs[4] = make_dev(&sio_cdevsw, 1337 unit | CALLOUT_MASK | CONTROL_INIT_STATE, 1338 UID_UUCP, GID_DIALER, 0660, "cuaia%r", unit); 1339 com->devs[5] = make_dev(&sio_cdevsw, 1340 unit | CALLOUT_MASK | CONTROL_LOCK_STATE, 1341 UID_UUCP, GID_DIALER, 0660, "cuala%r", unit); 1342 com->flags = flags; 1343 com->pps.ppscap = PPS_CAPTUREASSERT | PPS_CAPTURECLEAR; 1344 pps_init(&com->pps); 1345 1346 rid = 0; 1347 com->irqres = bus_alloc_resource(dev, SYS_RES_IRQ, &rid, 0ul, ~0ul, 1, 1348 RF_ACTIVE); 1349 if (com->irqres) { 1350 ret = BUS_SETUP_INTR(device_get_parent(dev), dev, com->irqres, 1351 INTR_TYPE_TTY | INTR_FAST, 1352 siointr, com, &com->cookie); 1353 if (ret) { 1354 ret = BUS_SETUP_INTR(device_get_parent(dev), dev, 1355 com->irqres, INTR_TYPE_TTY, 1356 siointr, com, &com->cookie); 1357 if (ret == 0) 1358 device_printf(dev, "unable to activate interrupt in fast mode - using normal mode"); 1359 } 1360 if (ret) 1361 device_printf(dev, "could not activate interrupt\n"); 1362 } 1363 1364 return (0); 1365} 1366 1367static int 1368sioopen(dev, flag, mode, p) 1369 dev_t dev; 1370 int flag; 1371 int mode; 1372 struct proc *p; 1373{ 1374 struct com_s *com; 1375 int error; 1376 int mynor; 1377 int s; 1378 struct tty *tp; 1379 int unit; 1380 1381 mynor = minor(dev); 1382 unit = MINOR_TO_UNIT(mynor); 1383 com = com_addr(unit); 1384 if (com == NULL) 1385 return (ENXIO); 1386 if (com->gone) 1387 return (ENXIO); 1388 if (mynor & CONTROL_MASK) 1389 return (0); 1390 tp = dev->si_tty = com->tp = ttymalloc(com->tp); 1391 s = spltty(); 1392 /* 1393 * We jump to this label after all non-interrupted sleeps to pick 1394 * up any changes of the device state. 1395 */ 1396open_top: 1397 while (com->state & CS_DTR_OFF) { 1398 error = tsleep(&com->dtr_wait, TTIPRI | PCATCH, "siodtr", 0); 1399 if (com_addr(unit) == NULL) 1400 return (ENXIO); 1401 if (error != 0 || com->gone) 1402 goto out; 1403 } 1404 if (tp->t_state & TS_ISOPEN) { 1405 /* 1406 * The device is open, so everything has been initialized. 1407 * Handle conflicts. 1408 */ 1409 if (mynor & CALLOUT_MASK) { 1410 if (!com->active_out) { 1411 error = EBUSY; 1412 goto out; 1413 } 1414 } else { 1415 if (com->active_out) { 1416 if (flag & O_NONBLOCK) { 1417 error = EBUSY; 1418 goto out; 1419 } 1420 error = tsleep(&com->active_out, 1421 TTIPRI | PCATCH, "siobi", 0); 1422 if (com_addr(unit) == NULL) 1423 return (ENXIO); 1424 if (error != 0 || com->gone) 1425 goto out; 1426 goto open_top; 1427 } 1428 } 1429 if (tp->t_state & TS_XCLUDE && 1430 suser(p)) { 1431 error = EBUSY; 1432 goto out; 1433 } 1434 } else { 1435 int intrsave; 1436 1437 /* 1438 * The device isn't open, so there are no conflicts. 1439 * Initialize it. Initialization is done twice in many 1440 * cases: to preempt sleeping callin opens if we are 1441 * callout, and to complete a callin open after DCD rises. 1442 */ 1443 tp->t_oproc = comstart; 1444 tp->t_param = comparam; 1445 tp->t_stop = comstop; 1446 tp->t_dev = dev; 1447 tp->t_termios = mynor & CALLOUT_MASK 1448 ? com->it_out : com->it_in; 1449 (void)commctl(com, TIOCM_DTR | TIOCM_RTS, DMSET); 1450 com->poll = com->no_irq; 1451 com->poll_output = com->loses_outints; 1452 ++com->wopeners; 1453 error = comparam(tp, &tp->t_termios); 1454 --com->wopeners; 1455 if (error != 0) 1456 goto out; 1457 /* 1458 * XXX we should goto open_top if comparam() slept. 1459 */ 1460 if (com->hasfifo) { 1461 /* 1462 * (Re)enable and drain fifos. 1463 * 1464 * Certain SMC chips cause problems if the fifos 1465 * are enabled while input is ready. Turn off the 1466 * fifo if necessary to clear the input. We test 1467 * the input ready bit after enabling the fifos 1468 * since we've already enabled them in comparam() 1469 * and to handle races between enabling and fresh 1470 * input. 1471 */ 1472 while (TRUE) { 1473 sio_setreg(com, com_fifo, 1474 FIFO_RCV_RST | FIFO_XMT_RST 1475 | com->fifo_image); 1476 /* 1477 * XXX the delays are for superstitious 1478 * historical reasons. It must be less than 1479 * the character time at the maximum 1480 * supported speed (87 usec at 115200 bps 1481 * 8N1). Otherwise we might loop endlessly 1482 * if data is streaming in. We used to use 1483 * delays of 100. That usually worked 1484 * because DELAY(100) used to usually delay 1485 * for about 85 usec instead of 100. 1486 */ 1487 DELAY(50); 1488 if (!(inb(com->line_status_port) & LSR_RXRDY)) 1489 break; 1490 sio_setreg(com, com_fifo, 0); 1491 DELAY(50); 1492 (void) inb(com->data_port); 1493 } 1494 } 1495 1496 intrsave = save_intr(); 1497 disable_intr(); 1498 COM_LOCK(); 1499 (void) inb(com->line_status_port); 1500 (void) inb(com->data_port); 1501 com->prev_modem_status = com->last_modem_status 1502 = inb(com->modem_status_port); 1503 if (COM_IIR_TXRDYBUG(com->flags)) { 1504 outb(com->intr_ctl_port, IER_ERXRDY | IER_ERLS 1505 | IER_EMSC); 1506 } else { 1507 outb(com->intr_ctl_port, IER_ERXRDY | IER_ETXRDY 1508 | IER_ERLS | IER_EMSC); 1509 } 1510 COM_UNLOCK(); 1511 restore_intr(intrsave); 1512 /* 1513 * Handle initial DCD. Callout devices get a fake initial 1514 * DCD (trapdoor DCD). If we are callout, then any sleeping 1515 * callin opens get woken up and resume sleeping on "siobi" 1516 * instead of "siodcd". 1517 */ 1518 /* 1519 * XXX `mynor & CALLOUT_MASK' should be 1520 * `tp->t_cflag & (SOFT_CARRIER | TRAPDOOR_CARRIER) where 1521 * TRAPDOOR_CARRIER is the default initial state for callout 1522 * devices and SOFT_CARRIER is like CLOCAL except it hides 1523 * the true carrier. 1524 */ 1525 if (com->prev_modem_status & MSR_DCD || mynor & CALLOUT_MASK) 1526 (*linesw[tp->t_line].l_modem)(tp, 1); 1527 } 1528 /* 1529 * Wait for DCD if necessary. 1530 */ 1531 if (!(tp->t_state & TS_CARR_ON) && !(mynor & CALLOUT_MASK) 1532 && !(tp->t_cflag & CLOCAL) && !(flag & O_NONBLOCK)) { 1533 ++com->wopeners; 1534 error = tsleep(TSA_CARR_ON(tp), TTIPRI | PCATCH, "siodcd", 0); 1535 if (com_addr(unit) == NULL) 1536 return (ENXIO); 1537 --com->wopeners; 1538 if (error != 0 || com->gone) 1539 goto out; 1540 goto open_top; 1541 } 1542 error = (*linesw[tp->t_line].l_open)(dev, tp); 1543 disc_optim(tp, &tp->t_termios, com); 1544 if (tp->t_state & TS_ISOPEN && mynor & CALLOUT_MASK) 1545 com->active_out = TRUE; 1546 siosettimeout(); 1547out: 1548 splx(s); 1549 if (!(tp->t_state & TS_ISOPEN) && com->wopeners == 0) 1550 comhardclose(com); 1551 return (error); 1552} 1553 1554static int 1555sioclose(dev, flag, mode, p) 1556 dev_t dev; 1557 int flag; 1558 int mode; 1559 struct proc *p; 1560{ 1561 struct com_s *com; 1562 int mynor; 1563 int s; 1564 struct tty *tp; 1565 1566 mynor = minor(dev); 1567 if (mynor & CONTROL_MASK) 1568 return (0); 1569 com = com_addr(MINOR_TO_UNIT(mynor)); 1570 if (com == NULL) 1571 return (ENODEV); 1572 tp = com->tp; 1573 s = spltty(); 1574 (*linesw[tp->t_line].l_close)(tp, flag); 1575 disc_optim(tp, &tp->t_termios, com); 1576 comstop(tp, FREAD | FWRITE); 1577 comhardclose(com); 1578 ttyclose(tp); 1579 siosettimeout(); 1580 splx(s); 1581 if (com->gone) { 1582 printf("sio%d: gone\n", com->unit); 1583 s = spltty(); 1584 if (com->ibuf != NULL) 1585 free(com->ibuf, M_DEVBUF); 1586 bzero(tp, sizeof *tp); 1587 splx(s); 1588 } 1589 return (0); 1590} 1591 1592static void 1593comhardclose(com) 1594 struct com_s *com; 1595{ 1596 int s; 1597 struct tty *tp; 1598 int unit; 1599 1600 unit = com->unit; 1601 s = spltty(); 1602 com->poll = FALSE; 1603 com->poll_output = FALSE; 1604 com->do_timestamp = FALSE; 1605 com->do_dcd_timestamp = FALSE; 1606 com->pps.ppsparam.mode = 0; 1607 sio_setreg(com, com_cfcr, com->cfcr_image &= ~CFCR_SBREAK); 1608 { 1609 sio_setreg(com, com_ier, 0); 1610 tp = com->tp; 1611 if (tp->t_cflag & HUPCL 1612 /* 1613 * XXX we will miss any carrier drop between here and the 1614 * next open. Perhaps we should watch DCD even when the 1615 * port is closed; it is not sufficient to check it at 1616 * the next open because it might go up and down while 1617 * we're not watching. 1618 */ 1619 || (!com->active_out 1620 && !(com->prev_modem_status & MSR_DCD) 1621 && !(com->it_in.c_cflag & CLOCAL)) 1622 || !(tp->t_state & TS_ISOPEN)) { 1623 (void)commctl(com, TIOCM_DTR, DMBIC); 1624 if (com->dtr_wait != 0 && !(com->state & CS_DTR_OFF)) { 1625 timeout(siodtrwakeup, com, com->dtr_wait); 1626 com->state |= CS_DTR_OFF; 1627 } 1628 } 1629 } 1630 if (com->hasfifo) { 1631 /* 1632 * Disable fifos so that they are off after controlled 1633 * reboots. Some BIOSes fail to detect 16550s when the 1634 * fifos are enabled. 1635 */ 1636 sio_setreg(com, com_fifo, 0); 1637 } 1638 com->active_out = FALSE; 1639 wakeup(&com->active_out); 1640 wakeup(TSA_CARR_ON(tp)); /* restart any wopeners */ 1641 splx(s); 1642} 1643 1644static int 1645sioread(dev, uio, flag) 1646 dev_t dev; 1647 struct uio *uio; 1648 int flag; 1649{ 1650 int mynor; 1651 struct com_s *com; 1652 1653 mynor = minor(dev); 1654 if (mynor & CONTROL_MASK) 1655 return (ENODEV); 1656 com = com_addr(MINOR_TO_UNIT(mynor)); 1657 if (com == NULL || com->gone) 1658 return (ENODEV); 1659 return ((*linesw[com->tp->t_line].l_read)(com->tp, uio, flag)); 1660} 1661 1662static int 1663siowrite(dev, uio, flag) 1664 dev_t dev; 1665 struct uio *uio; 1666 int flag; 1667{ 1668 int mynor; 1669 struct com_s *com; 1670 int unit; 1671 1672 mynor = minor(dev); 1673 if (mynor & CONTROL_MASK) 1674 return (ENODEV); 1675 1676 unit = MINOR_TO_UNIT(mynor); 1677 com = com_addr(unit); 1678 if (com == NULL || com->gone) 1679 return (ENODEV); 1680 /* 1681 * (XXX) We disallow virtual consoles if the physical console is 1682 * a serial port. This is in case there is a display attached that 1683 * is not the console. In that situation we don't need/want the X 1684 * server taking over the console. 1685 */ 1686 if (constty != NULL && unit == comconsole) 1687 constty = NULL; 1688 return ((*linesw[com->tp->t_line].l_write)(com->tp, uio, flag)); 1689} 1690 1691static void 1692siobusycheck(chan) 1693 void *chan; 1694{ 1695 struct com_s *com; 1696 int s; 1697 1698 com = (struct com_s *)chan; 1699 1700 /* 1701 * Clear TS_BUSY if low-level output is complete. 1702 * spl locking is sufficient because siointr1() does not set CS_BUSY. 1703 * If siointr1() clears CS_BUSY after we look at it, then we'll get 1704 * called again. Reading the line status port outside of siointr1() 1705 * is safe because CS_BUSY is clear so there are no output interrupts 1706 * to lose. 1707 */ 1708 s = spltty(); 1709 if (com->state & CS_BUSY) 1710 com->extra_state &= ~CSE_BUSYCHECK; /* False alarm. */ 1711 else if ((inb(com->line_status_port) & (LSR_TSRE | LSR_TXRDY)) 1712 == (LSR_TSRE | LSR_TXRDY)) { 1713 com->tp->t_state &= ~TS_BUSY; 1714 ttwwakeup(com->tp); 1715 com->extra_state &= ~CSE_BUSYCHECK; 1716 } else 1717 timeout(siobusycheck, com, hz / 100); 1718 splx(s); 1719} 1720 1721static void 1722siodtrwakeup(chan) 1723 void *chan; 1724{ 1725 struct com_s *com; 1726 1727 com = (struct com_s *)chan; 1728 com->state &= ~CS_DTR_OFF; 1729 wakeup(&com->dtr_wait); 1730} 1731 1732/* 1733 * Call this function with COM_LOCK. It will return with the lock still held. 1734 */ 1735static void 1736sioinput(com) 1737 struct com_s *com; 1738{ 1739 u_char *buf; 1740 int incc; 1741 u_char line_status; 1742 int recv_data; 1743 struct tty *tp; 1744 int intrsave; 1745 1746 buf = com->ibuf; 1747 tp = com->tp; 1748 if (!(tp->t_state & TS_ISOPEN) || !(tp->t_cflag & CREAD)) { 1749 com_events -= (com->iptr - com->ibuf); 1750 com->iptr = com->ibuf; 1751 return; 1752 } 1753 if (tp->t_state & TS_CAN_BYPASS_L_RINT) { 1754 /* 1755 * Avoid the grotesquely inefficient lineswitch routine 1756 * (ttyinput) in "raw" mode. It usually takes about 450 1757 * instructions (that's without canonical processing or echo!). 1758 * slinput is reasonably fast (usually 40 instructions plus 1759 * call overhead). 1760 */ 1761 do { 1762 /* 1763 * This may look odd, but it is using save-and-enable 1764 * semantics instead of the save-and-disable semantics 1765 * that are used everywhere else. 1766 */ 1767 intrsave = save_intr(); 1768 COM_UNLOCK(); 1769 enable_intr(); 1770 incc = com->iptr - buf; 1771 if (tp->t_rawq.c_cc + incc > tp->t_ihiwat 1772 && (com->state & CS_RTS_IFLOW 1773 || tp->t_iflag & IXOFF) 1774 && !(tp->t_state & TS_TBLOCK)) 1775 ttyblock(tp); 1776 com->delta_error_counts[CE_TTY_BUF_OVERFLOW] 1777 += b_to_q((char *)buf, incc, &tp->t_rawq); 1778 buf += incc; 1779 tk_nin += incc; 1780 tk_rawcc += incc; 1781 tp->t_rawcc += incc; 1782 ttwakeup(tp); 1783 if (tp->t_state & TS_TTSTOP 1784 && (tp->t_iflag & IXANY 1785 || tp->t_cc[VSTART] == tp->t_cc[VSTOP])) { 1786 tp->t_state &= ~TS_TTSTOP; 1787 tp->t_lflag &= ~FLUSHO; 1788 comstart(tp); 1789 } 1790 restore_intr(intrsave); 1791 COM_LOCK(); 1792 } while (buf < com->iptr); 1793 } else { 1794 do { 1795 /* 1796 * This may look odd, but it is using save-and-enable 1797 * semantics instead of the save-and-disable semantics 1798 * that are used everywhere else. 1799 */ 1800 intrsave = save_intr(); 1801 COM_UNLOCK(); 1802 enable_intr(); 1803 line_status = buf[com->ierroff]; 1804 recv_data = *buf++; 1805 if (line_status 1806 & (LSR_BI | LSR_FE | LSR_OE | LSR_PE)) { 1807 if (line_status & LSR_BI) 1808 recv_data |= TTY_BI; 1809 if (line_status & LSR_FE) 1810 recv_data |= TTY_FE; 1811 if (line_status & LSR_OE) 1812 recv_data |= TTY_OE; 1813 if (line_status & LSR_PE) 1814 recv_data |= TTY_PE; 1815 } 1816 (*linesw[tp->t_line].l_rint)(recv_data, tp); 1817 restore_intr(intrsave); 1818 COM_LOCK(); 1819 } while (buf < com->iptr); 1820 } 1821 com_events -= (com->iptr - com->ibuf); 1822 com->iptr = com->ibuf; 1823 1824 /* 1825 * There is now room for another low-level buffer full of input, 1826 * so enable RTS if it is now disabled and there is room in the 1827 * high-level buffer. 1828 */ 1829 if ((com->state & CS_RTS_IFLOW) && !(com->mcr_image & MCR_RTS) && 1830 !(tp->t_state & TS_TBLOCK)) 1831 outb(com->modem_ctl_port, com->mcr_image |= MCR_RTS); 1832} 1833 1834void 1835siointr(arg) 1836 void *arg; 1837{ 1838#ifndef COM_MULTIPORT 1839 COM_LOCK(); 1840 siointr1((struct com_s *) arg); 1841 COM_UNLOCK(); 1842#else /* COM_MULTIPORT */ 1843 bool_t possibly_more_intrs; 1844 int unit; 1845 struct com_s *com; 1846 1847 /* 1848 * Loop until there is no activity on any port. This is necessary 1849 * to get an interrupt edge more than to avoid another interrupt. 1850 * If the IRQ signal is just an OR of the IRQ signals from several 1851 * devices, then the edge from one may be lost because another is 1852 * on. 1853 */ 1854 COM_LOCK(); 1855 do { 1856 possibly_more_intrs = FALSE; 1857 for (unit = 0; unit < sio_numunits; ++unit) { 1858 com = com_addr(unit); 1859 /* 1860 * XXX COM_LOCK(); 1861 * would it work here, or be counter-productive? 1862 */ 1863 if (com != NULL 1864 && !com->gone 1865 && (inb(com->int_id_port) & IIR_IMASK) 1866 != IIR_NOPEND) { 1867 siointr1(com); 1868 possibly_more_intrs = TRUE; 1869 } 1870 /* XXX COM_UNLOCK(); */ 1871 } 1872 } while (possibly_more_intrs); 1873 COM_UNLOCK(); 1874#endif /* COM_MULTIPORT */ 1875} 1876 1877static void 1878siointr1(com) 1879 struct com_s *com; 1880{ 1881 u_char line_status; 1882 u_char modem_status; 1883 u_char *ioptr; 1884 u_char recv_data; 1885 u_char int_ctl; 1886 u_char int_ctl_new; 1887 struct timecounter *tc; 1888 u_int count; 1889 1890 int_ctl = inb(com->intr_ctl_port); 1891 int_ctl_new = int_ctl; 1892 1893 while (!com->gone) { 1894 if (com->pps.ppsparam.mode & PPS_CAPTUREBOTH) { 1895 modem_status = inb(com->modem_status_port); 1896 if ((modem_status ^ com->last_modem_status) & MSR_DCD) { 1897 tc = timecounter; 1898 count = tc->tc_get_timecount(tc); 1899 pps_event(&com->pps, tc, count, 1900 (modem_status & MSR_DCD) ? 1901 PPS_CAPTUREASSERT : PPS_CAPTURECLEAR); 1902 } 1903 } 1904 line_status = inb(com->line_status_port); 1905 1906 /* input event? (check first to help avoid overruns) */ 1907 while (line_status & LSR_RCV_MASK) { 1908 /* break/unnattached error bits or real input? */ 1909 if (!(line_status & LSR_RXRDY)) 1910 recv_data = 0; 1911 else 1912 recv_data = inb(com->data_port); 1913#if defined(DDB) && defined(ALT_BREAK_TO_DEBUGGER) 1914 /* 1915 * Solaris implements a new BREAK which is initiated 1916 * by a character sequence CR ~ ^b which is similar 1917 * to a familiar pattern used on Sun servers by the 1918 * Remote Console. 1919 */ 1920#define KEY_CRTLB 2 /* ^B */ 1921#define KEY_CR 13 /* CR '\r' */ 1922#define KEY_TILDE 126 /* ~ */ 1923 1924 if (com->unit == comconsole) { 1925 static int brk_state1 = 0, brk_state2 = 0; 1926 if (recv_data == KEY_CR) { 1927 brk_state1 = recv_data; 1928 brk_state2 = 0; 1929 } else if (brk_state1 == KEY_CR 1930 && (recv_data == KEY_TILDE 1931 || recv_data == KEY_CRTLB)) { 1932 if (recv_data == KEY_TILDE) 1933 brk_state2 = recv_data; 1934 else if (brk_state2 == KEY_TILDE 1935 && recv_data == KEY_CRTLB) { 1936 breakpoint(); 1937 brk_state1 = 0; 1938 brk_state2 = 0; 1939 goto cont; 1940 } else 1941 brk_state2 = 0; 1942 } else 1943 brk_state1 = 0; 1944 } 1945#endif 1946 if (line_status & (LSR_BI | LSR_FE | LSR_PE)) { 1947 /* 1948 * Don't store BI if IGNBRK or FE/PE if IGNPAR. 1949 * Otherwise, push the work to a higher level 1950 * (to handle PARMRK) if we're bypassing. 1951 * Otherwise, convert BI/FE and PE+INPCK to 0. 1952 * 1953 * This makes bypassing work right in the 1954 * usual "raw" case (IGNBRK set, and IGNPAR 1955 * and INPCK clear). 1956 * 1957 * Note: BI together with FE/PE means just BI. 1958 */ 1959 if (line_status & LSR_BI) { 1960#if defined(DDB) && defined(BREAK_TO_DEBUGGER) 1961 if (com->unit == comconsole) { 1962 breakpoint(); 1963 goto cont; 1964 } 1965#endif 1966 if (com->tp == NULL 1967 || com->tp->t_iflag & IGNBRK) 1968 goto cont; 1969 } else { 1970 if (com->tp == NULL 1971 || com->tp->t_iflag & IGNPAR) 1972 goto cont; 1973 } 1974 if (com->tp->t_state & TS_CAN_BYPASS_L_RINT 1975 && (line_status & (LSR_BI | LSR_FE) 1976 || com->tp->t_iflag & INPCK)) 1977 recv_data = 0; 1978 } 1979 ++com->bytes_in; 1980 if (com->hotchar != 0 && recv_data == com->hotchar) 1981 setsofttty(); 1982 ioptr = com->iptr; 1983 if (ioptr >= com->ibufend) 1984 CE_RECORD(com, CE_INTERRUPT_BUF_OVERFLOW); 1985 else { 1986 if (com->do_timestamp) 1987 microtime(&com->timestamp); 1988 ++com_events; 1989/* XXX - needs to go away when alpha gets ithreads */ 1990#ifdef __alpha__ 1991 schedsofttty(); 1992#else 1993 setsofttty(); 1994#endif 1995#if 0 /* for testing input latency vs efficiency */ 1996if (com->iptr - com->ibuf == 8) 1997 setsofttty(); 1998#endif 1999 ioptr[0] = recv_data; 2000 ioptr[com->ierroff] = line_status; 2001 com->iptr = ++ioptr; 2002 if (ioptr == com->ihighwater 2003 && com->state & CS_RTS_IFLOW) 2004 outb(com->modem_ctl_port, 2005 com->mcr_image &= ~MCR_RTS); 2006 if (line_status & LSR_OE) 2007 CE_RECORD(com, CE_OVERRUN); 2008 } 2009cont: 2010 /* 2011 * "& 0x7F" is to avoid the gcc-1.40 generating a slow 2012 * jump from the top of the loop to here 2013 */ 2014 line_status = inb(com->line_status_port) & 0x7F; 2015 } 2016 2017 /* modem status change? (always check before doing output) */ 2018 modem_status = inb(com->modem_status_port); 2019 if (modem_status != com->last_modem_status) { 2020 if (com->do_dcd_timestamp 2021 && !(com->last_modem_status & MSR_DCD) 2022 && modem_status & MSR_DCD) 2023 microtime(&com->dcd_timestamp); 2024 2025 /* 2026 * Schedule high level to handle DCD changes. Note 2027 * that we don't use the delta bits anywhere. Some 2028 * UARTs mess them up, and it's easy to remember the 2029 * previous bits and calculate the delta. 2030 */ 2031 com->last_modem_status = modem_status; 2032 if (!(com->state & CS_CHECKMSR)) { 2033 com_events += LOTS_OF_EVENTS; 2034 com->state |= CS_CHECKMSR; 2035 setsofttty(); 2036 } 2037 2038 /* handle CTS change immediately for crisp flow ctl */ 2039 if (com->state & CS_CTS_OFLOW) { 2040 if (modem_status & MSR_CTS) 2041 com->state |= CS_ODEVREADY; 2042 else 2043 com->state &= ~CS_ODEVREADY; 2044 } 2045 } 2046 2047 /* output queued and everything ready? */ 2048 if (line_status & LSR_TXRDY 2049 && com->state >= (CS_BUSY | CS_TTGO | CS_ODEVREADY)) { 2050 ioptr = com->obufq.l_head; 2051 if (com->tx_fifo_size > 1) { 2052 u_int ocount; 2053 2054 ocount = com->obufq.l_tail - ioptr; 2055 if (ocount > com->tx_fifo_size) 2056 ocount = com->tx_fifo_size; 2057 com->bytes_out += ocount; 2058 do 2059 outb(com->data_port, *ioptr++); 2060 while (--ocount != 0); 2061 } else { 2062 outb(com->data_port, *ioptr++); 2063 ++com->bytes_out; 2064 } 2065 com->obufq.l_head = ioptr; 2066 if (COM_IIR_TXRDYBUG(com->flags)) { 2067 int_ctl_new = int_ctl | IER_ETXRDY; 2068 } 2069 if (ioptr >= com->obufq.l_tail) { 2070 struct lbq *qp; 2071 2072 qp = com->obufq.l_next; 2073 qp->l_queued = FALSE; 2074 qp = qp->l_next; 2075 if (qp != NULL) { 2076 com->obufq.l_head = qp->l_head; 2077 com->obufq.l_tail = qp->l_tail; 2078 com->obufq.l_next = qp; 2079 } else { 2080 /* output just completed */ 2081 if (COM_IIR_TXRDYBUG(com->flags)) { 2082 int_ctl_new = int_ctl & ~IER_ETXRDY; 2083 } 2084 com->state &= ~CS_BUSY; 2085 } 2086 if (!(com->state & CS_ODONE)) { 2087 com_events += LOTS_OF_EVENTS; 2088 com->state |= CS_ODONE; 2089 setsofttty(); /* handle at high level ASAP */ 2090 } 2091 } 2092 if (COM_IIR_TXRDYBUG(com->flags) && (int_ctl != int_ctl_new)) { 2093 outb(com->intr_ctl_port, int_ctl_new); 2094 } 2095 } 2096 2097 /* finished? */ 2098#ifndef COM_MULTIPORT 2099 if ((inb(com->int_id_port) & IIR_IMASK) == IIR_NOPEND) 2100#endif /* COM_MULTIPORT */ 2101 return; 2102 } 2103} 2104 2105static int 2106sioioctl(dev, cmd, data, flag, p) 2107 dev_t dev; 2108 u_long cmd; 2109 caddr_t data; 2110 int flag; 2111 struct proc *p; 2112{ 2113 struct com_s *com; 2114 int error; 2115 int mynor; 2116 int s; 2117 struct tty *tp; 2118#if defined(COMPAT_43) || defined(COMPAT_SUNOS) 2119 u_long oldcmd; 2120 struct termios term; 2121#endif 2122 2123 mynor = minor(dev); 2124 com = com_addr(MINOR_TO_UNIT(mynor)); 2125 if (com == NULL || com->gone) 2126 return (ENODEV); 2127 if (mynor & CONTROL_MASK) { 2128 struct termios *ct; 2129 2130 switch (mynor & CONTROL_MASK) { 2131 case CONTROL_INIT_STATE: 2132 ct = mynor & CALLOUT_MASK ? &com->it_out : &com->it_in; 2133 break; 2134 case CONTROL_LOCK_STATE: 2135 ct = mynor & CALLOUT_MASK ? &com->lt_out : &com->lt_in; 2136 break; 2137 default: 2138 return (ENODEV); /* /dev/nodev */ 2139 } 2140 switch (cmd) { 2141 case TIOCSETA: 2142 error = suser(p); 2143 if (error != 0) 2144 return (error); 2145 *ct = *(struct termios *)data; 2146 return (0); 2147 case TIOCGETA: 2148 *(struct termios *)data = *ct; 2149 return (0); 2150 case TIOCGETD: 2151 *(int *)data = TTYDISC; 2152 return (0); 2153 case TIOCGWINSZ: 2154 bzero(data, sizeof(struct winsize)); 2155 return (0); 2156 default: 2157 return (ENOTTY); 2158 } 2159 } 2160 tp = com->tp; 2161#if defined(COMPAT_43) || defined(COMPAT_SUNOS) 2162 term = tp->t_termios; 2163 oldcmd = cmd; 2164 error = ttsetcompat(tp, &cmd, data, &term); 2165 if (error != 0) 2166 return (error); 2167 if (cmd != oldcmd) 2168 data = (caddr_t)&term; 2169#endif 2170 if (cmd == TIOCSETA || cmd == TIOCSETAW || cmd == TIOCSETAF) { 2171 int cc; 2172 struct termios *dt = (struct termios *)data; 2173 struct termios *lt = mynor & CALLOUT_MASK 2174 ? &com->lt_out : &com->lt_in; 2175 2176 dt->c_iflag = (tp->t_iflag & lt->c_iflag) 2177 | (dt->c_iflag & ~lt->c_iflag); 2178 dt->c_oflag = (tp->t_oflag & lt->c_oflag) 2179 | (dt->c_oflag & ~lt->c_oflag); 2180 dt->c_cflag = (tp->t_cflag & lt->c_cflag) 2181 | (dt->c_cflag & ~lt->c_cflag); 2182 dt->c_lflag = (tp->t_lflag & lt->c_lflag) 2183 | (dt->c_lflag & ~lt->c_lflag); 2184 for (cc = 0; cc < NCCS; ++cc) 2185 if (lt->c_cc[cc] != 0) 2186 dt->c_cc[cc] = tp->t_cc[cc]; 2187 if (lt->c_ispeed != 0) 2188 dt->c_ispeed = tp->t_ispeed; 2189 if (lt->c_ospeed != 0) 2190 dt->c_ospeed = tp->t_ospeed; 2191 } 2192 error = (*linesw[tp->t_line].l_ioctl)(tp, cmd, data, flag, p); 2193 if (error != ENOIOCTL) 2194 return (error); 2195 s = spltty(); 2196 error = ttioctl(tp, cmd, data, flag); 2197 disc_optim(tp, &tp->t_termios, com); 2198 if (error != ENOIOCTL) { 2199 splx(s); 2200 return (error); 2201 } 2202 switch (cmd) { 2203 case TIOCSBRK: 2204 sio_setreg(com, com_cfcr, com->cfcr_image |= CFCR_SBREAK); 2205 break; 2206 case TIOCCBRK: 2207 sio_setreg(com, com_cfcr, com->cfcr_image &= ~CFCR_SBREAK); 2208 break; 2209 case TIOCSDTR: 2210 (void)commctl(com, TIOCM_DTR, DMBIS); 2211 break; 2212 case TIOCCDTR: 2213 (void)commctl(com, TIOCM_DTR, DMBIC); 2214 break; 2215 /* 2216 * XXX should disallow changing MCR_RTS if CS_RTS_IFLOW is set. The 2217 * changes get undone on the next call to comparam(). 2218 */ 2219 case TIOCMSET: 2220 (void)commctl(com, *(int *)data, DMSET); 2221 break; 2222 case TIOCMBIS: 2223 (void)commctl(com, *(int *)data, DMBIS); 2224 break; 2225 case TIOCMBIC: 2226 (void)commctl(com, *(int *)data, DMBIC); 2227 break; 2228 case TIOCMGET: 2229 *(int *)data = commctl(com, 0, DMGET); 2230 break; 2231 case TIOCMSDTRWAIT: 2232 /* must be root since the wait applies to following logins */ 2233 error = suser(p); 2234 if (error != 0) { 2235 splx(s); 2236 return (error); 2237 } 2238 com->dtr_wait = *(int *)data * hz / 100; 2239 break; 2240 case TIOCMGDTRWAIT: 2241 *(int *)data = com->dtr_wait * 100 / hz; 2242 break; 2243 case TIOCTIMESTAMP: 2244 com->do_timestamp = TRUE; 2245 *(struct timeval *)data = com->timestamp; 2246 break; 2247 case TIOCDCDTIMESTAMP: 2248 com->do_dcd_timestamp = TRUE; 2249 *(struct timeval *)data = com->dcd_timestamp; 2250 break; 2251 default: 2252 splx(s); 2253 error = pps_ioctl(cmd, data, &com->pps); 2254 if (error == ENODEV) 2255 error = ENOTTY; 2256 return (error); 2257 } 2258 splx(s); 2259 return (0); 2260} 2261 2262/* software interrupt handler for SWI_TTY */ 2263static void 2264siopoll() 2265{ 2266 int unit; 2267 int intrsave; 2268 2269 if (com_events == 0) 2270 return; 2271repeat: 2272 for (unit = 0; unit < sio_numunits; ++unit) { 2273 struct com_s *com; 2274 int incc; 2275 struct tty *tp; 2276 2277 com = com_addr(unit); 2278 if (com == NULL) 2279 continue; 2280 tp = com->tp; 2281 if (tp == NULL || com->gone) { 2282 /* 2283 * Discard any events related to never-opened or 2284 * going-away devices. 2285 */ 2286 intrsave = save_intr(); 2287 disable_intr(); 2288 COM_LOCK(); 2289 incc = com->iptr - com->ibuf; 2290 com->iptr = com->ibuf; 2291 if (com->state & CS_CHECKMSR) { 2292 incc += LOTS_OF_EVENTS; 2293 com->state &= ~CS_CHECKMSR; 2294 } 2295 com_events -= incc; 2296 COM_UNLOCK(); 2297 restore_intr(intrsave); 2298 continue; 2299 } 2300 if (com->iptr != com->ibuf) { 2301 intrsave = save_intr(); 2302 disable_intr(); 2303 COM_LOCK(); 2304 sioinput(com); 2305 COM_UNLOCK(); 2306 restore_intr(intrsave); 2307 } 2308 if (com->state & CS_CHECKMSR) { 2309 u_char delta_modem_status; 2310 2311 intrsave = save_intr(); 2312 disable_intr(); 2313 COM_LOCK(); 2314 delta_modem_status = com->last_modem_status 2315 ^ com->prev_modem_status; 2316 com->prev_modem_status = com->last_modem_status; 2317 com_events -= LOTS_OF_EVENTS; 2318 com->state &= ~CS_CHECKMSR; 2319 COM_UNLOCK(); 2320 restore_intr(intrsave); 2321 if (delta_modem_status & MSR_DCD) 2322 (*linesw[tp->t_line].l_modem) 2323 (tp, com->prev_modem_status & MSR_DCD); 2324 } 2325 if (com->state & CS_ODONE) { 2326 intrsave = save_intr(); 2327 disable_intr(); 2328 COM_LOCK(); 2329 com_events -= LOTS_OF_EVENTS; 2330 com->state &= ~CS_ODONE; 2331 COM_UNLOCK(); 2332 restore_intr(intrsave); 2333 if (!(com->state & CS_BUSY) 2334 && !(com->extra_state & CSE_BUSYCHECK)) { 2335 timeout(siobusycheck, com, hz / 100); 2336 com->extra_state |= CSE_BUSYCHECK; 2337 } 2338 (*linesw[tp->t_line].l_start)(tp); 2339 } 2340 if (com_events == 0) 2341 break; 2342 } 2343 if (com_events >= LOTS_OF_EVENTS) 2344 goto repeat; 2345} 2346 2347static int 2348comparam(tp, t) 2349 struct tty *tp; 2350 struct termios *t; 2351{ 2352 u_int cfcr; 2353 int cflag; 2354 struct com_s *com; 2355 int divisor; 2356 u_char dlbh; 2357 u_char dlbl; 2358 int s; 2359 int unit; 2360 int intrsave; 2361 2362 /* do historical conversions */ 2363 if (t->c_ispeed == 0) 2364 t->c_ispeed = t->c_ospeed; 2365 2366 /* check requested parameters */ 2367 divisor = ttspeedtab(t->c_ospeed, comspeedtab); 2368 if (divisor < 0 || (divisor > 0 && t->c_ispeed != t->c_ospeed)) 2369 return (EINVAL); 2370 2371 /* parameters are OK, convert them to the com struct and the device */ 2372 unit = DEV_TO_UNIT(tp->t_dev); 2373 com = com_addr(unit); 2374 if (com == NULL) 2375 return (ENODEV); 2376 s = spltty(); 2377 if (divisor == 0) 2378 (void)commctl(com, TIOCM_DTR, DMBIC); /* hang up line */ 2379 else 2380 (void)commctl(com, TIOCM_DTR, DMBIS); 2381 cflag = t->c_cflag; 2382 switch (cflag & CSIZE) { 2383 case CS5: 2384 cfcr = CFCR_5BITS; 2385 break; 2386 case CS6: 2387 cfcr = CFCR_6BITS; 2388 break; 2389 case CS7: 2390 cfcr = CFCR_7BITS; 2391 break; 2392 default: 2393 cfcr = CFCR_8BITS; 2394 break; 2395 } 2396 if (cflag & PARENB) { 2397 cfcr |= CFCR_PENAB; 2398 if (!(cflag & PARODD)) 2399 cfcr |= CFCR_PEVEN; 2400 } 2401 if (cflag & CSTOPB) 2402 cfcr |= CFCR_STOPB; 2403 2404 if (com->hasfifo && divisor != 0) { 2405 /* 2406 * Use a fifo trigger level low enough so that the input 2407 * latency from the fifo is less than about 16 msec and 2408 * the total latency is less than about 30 msec. These 2409 * latencies are reasonable for humans. Serial comms 2410 * protocols shouldn't expect anything better since modem 2411 * latencies are larger. 2412 */ 2413 com->fifo_image = t->c_ospeed <= 4800 2414 ? FIFO_ENABLE : FIFO_ENABLE | FIFO_RX_HIGH; 2415#ifdef COM_ESP 2416 /* 2417 * The Hayes ESP card needs the fifo DMA mode bit set 2418 * in compatibility mode. If not, it will interrupt 2419 * for each character received. 2420 */ 2421 if (com->esp) 2422 com->fifo_image |= FIFO_DMA_MODE; 2423#endif 2424 sio_setreg(com, com_fifo, com->fifo_image); 2425 } 2426 2427 /* 2428 * This returns with interrupts disabled so that we can complete 2429 * the speed change atomically. Keeping interrupts disabled is 2430 * especially important while com_data is hidden. 2431 */ 2432 intrsave = save_intr(); 2433 (void) siosetwater(com, t->c_ispeed); 2434 2435 if (divisor != 0) { 2436 sio_setreg(com, com_cfcr, cfcr | CFCR_DLAB); 2437 /* 2438 * Only set the divisor registers if they would change, 2439 * since on some 16550 incompatibles (UMC8669F), setting 2440 * them while input is arriving them loses sync until 2441 * data stops arriving. 2442 */ 2443 dlbl = divisor & 0xFF; 2444 if (sio_getreg(com, com_dlbl) != dlbl) 2445 sio_setreg(com, com_dlbl, dlbl); 2446 dlbh = (u_int) divisor >> 8; 2447 if (sio_getreg(com, com_dlbh) != dlbh) 2448 sio_setreg(com, com_dlbh, dlbh); 2449 } 2450 2451 sio_setreg(com, com_cfcr, com->cfcr_image = cfcr); 2452 2453 if (!(tp->t_state & TS_TTSTOP)) 2454 com->state |= CS_TTGO; 2455 2456 if (cflag & CRTS_IFLOW) { 2457 if (com->st16650a) { 2458 sio_setreg(com, com_cfcr, 0xbf); 2459 sio_setreg(com, com_fifo, 2460 sio_getreg(com, com_fifo) | 0x40); 2461 } 2462 com->state |= CS_RTS_IFLOW; 2463 /* 2464 * If CS_RTS_IFLOW just changed from off to on, the change 2465 * needs to be propagated to MCR_RTS. This isn't urgent, 2466 * so do it later by calling comstart() instead of repeating 2467 * a lot of code from comstart() here. 2468 */ 2469 } else if (com->state & CS_RTS_IFLOW) { 2470 com->state &= ~CS_RTS_IFLOW; 2471 /* 2472 * CS_RTS_IFLOW just changed from on to off. Force MCR_RTS 2473 * on here, since comstart() won't do it later. 2474 */ 2475 outb(com->modem_ctl_port, com->mcr_image |= MCR_RTS); 2476 if (com->st16650a) { 2477 sio_setreg(com, com_cfcr, 0xbf); 2478 sio_setreg(com, com_fifo, 2479 sio_getreg(com, com_fifo) & ~0x40); 2480 } 2481 } 2482 2483 2484 /* 2485 * Set up state to handle output flow control. 2486 * XXX - worth handling MDMBUF (DCD) flow control at the lowest level? 2487 * Now has 10+ msec latency, while CTS flow has 50- usec latency. 2488 */ 2489 com->state |= CS_ODEVREADY; 2490 com->state &= ~CS_CTS_OFLOW; 2491 if (cflag & CCTS_OFLOW) { 2492 com->state |= CS_CTS_OFLOW; 2493 if (!(com->last_modem_status & MSR_CTS)) 2494 com->state &= ~CS_ODEVREADY; 2495 if (com->st16650a) { 2496 sio_setreg(com, com_cfcr, 0xbf); 2497 sio_setreg(com, com_fifo, 2498 sio_getreg(com, com_fifo) | 0x80); 2499 } 2500 } else { 2501 if (com->st16650a) { 2502 sio_setreg(com, com_cfcr, 0xbf); 2503 sio_setreg(com, com_fifo, 2504 sio_getreg(com, com_fifo) & ~0x80); 2505 } 2506 } 2507 2508 sio_setreg(com, com_cfcr, com->cfcr_image); 2509 2510 /* XXX shouldn't call functions while intrs are disabled. */ 2511 disc_optim(tp, t, com); 2512 /* 2513 * Recover from fiddling with CS_TTGO. We used to call siointr1() 2514 * unconditionally, but that defeated the careful discarding of 2515 * stale input in sioopen(). 2516 */ 2517 if (com->state >= (CS_BUSY | CS_TTGO)) 2518 siointr1(com); 2519 2520 COM_UNLOCK(); 2521 restore_intr(intrsave); 2522 splx(s); 2523 comstart(tp); 2524 if (com->ibufold != NULL) { 2525 free(com->ibufold, M_DEVBUF); 2526 com->ibufold = NULL; 2527 } 2528 return (0); 2529} 2530 2531/* 2532 * This function must be called with interrupts enabled and the com_lock 2533 * unlocked. It will return with interrupts disabled and the com_lock locked. 2534 */ 2535static int 2536siosetwater(com, speed) 2537 struct com_s *com; 2538 speed_t speed; 2539{ 2540 int cp4ticks; 2541 u_char *ibuf; 2542 int ibufsize; 2543 struct tty *tp; 2544 2545 /* 2546 * Make the buffer size large enough to handle a softtty interrupt 2547 * latency of about 2 ticks without loss of throughput or data 2548 * (about 3 ticks if input flow control is not used or not honoured, 2549 * but a bit less for CS5-CS7 modes). 2550 */ 2551 cp4ticks = speed / 10 / hz * 4; 2552 for (ibufsize = 128; ibufsize < cp4ticks;) 2553 ibufsize <<= 1; 2554 if (ibufsize == com->ibufsize) { 2555 disable_intr(); 2556 COM_LOCK(); 2557 return (0); 2558 } 2559 2560 /* 2561 * Allocate input buffer. The extra factor of 2 in the size is 2562 * to allow for an error byte for each input byte. 2563 */ 2564 ibuf = malloc(2 * ibufsize, M_DEVBUF, M_NOWAIT); 2565 if (ibuf == NULL) { 2566 disable_intr(); 2567 COM_LOCK(); 2568 return (ENOMEM); 2569 } 2570 2571 /* Initialize non-critical variables. */ 2572 com->ibufold = com->ibuf; 2573 com->ibufsize = ibufsize; 2574 tp = com->tp; 2575 if (tp != NULL) { 2576 tp->t_ififosize = 2 * ibufsize; 2577 tp->t_ispeedwat = (speed_t)-1; 2578 tp->t_ospeedwat = (speed_t)-1; 2579 } 2580 2581 /* 2582 * Read current input buffer, if any. Continue with interrupts 2583 * disabled. 2584 */ 2585 disable_intr(); 2586 COM_LOCK(); 2587 if (com->iptr != com->ibuf) 2588 sioinput(com); 2589 2590 /*- 2591 * Initialize critical variables, including input buffer watermarks. 2592 * The external device is asked to stop sending when the buffer 2593 * exactly reaches high water, or when the high level requests it. 2594 * The high level is notified immediately (rather than at a later 2595 * clock tick) when this watermark is reached. 2596 * The buffer size is chosen so the watermark should almost never 2597 * be reached. 2598 * The low watermark is invisibly 0 since the buffer is always 2599 * emptied all at once. 2600 */ 2601 com->iptr = com->ibuf = ibuf; 2602 com->ibufend = ibuf + ibufsize; 2603 com->ierroff = ibufsize; 2604 com->ihighwater = ibuf + 3 * ibufsize / 4; 2605 return (0); 2606} 2607 2608static void 2609comstart(tp) 2610 struct tty *tp; 2611{ 2612 struct com_s *com; 2613 int s; 2614 int unit; 2615 int intrsave; 2616 2617 unit = DEV_TO_UNIT(tp->t_dev); 2618 com = com_addr(unit); 2619 if (com == NULL) 2620 return; 2621 s = spltty(); 2622 intrsave = save_intr(); 2623 disable_intr(); 2624 COM_LOCK(); 2625 if (tp->t_state & TS_TTSTOP) 2626 com->state &= ~CS_TTGO; 2627 else 2628 com->state |= CS_TTGO; 2629 if (tp->t_state & TS_TBLOCK) { 2630 if (com->mcr_image & MCR_RTS && com->state & CS_RTS_IFLOW) 2631 outb(com->modem_ctl_port, com->mcr_image &= ~MCR_RTS); 2632 } else { 2633 if (!(com->mcr_image & MCR_RTS) && com->iptr < com->ihighwater 2634 && com->state & CS_RTS_IFLOW) 2635 outb(com->modem_ctl_port, com->mcr_image |= MCR_RTS); 2636 } 2637 COM_UNLOCK(); 2638 restore_intr(intrsave); 2639 if (tp->t_state & (TS_TIMEOUT | TS_TTSTOP)) { 2640 ttwwakeup(tp); 2641 splx(s); 2642 return; 2643 } 2644 if (tp->t_outq.c_cc != 0) { 2645 struct lbq *qp; 2646 struct lbq *next; 2647 2648 if (!com->obufs[0].l_queued) { 2649 com->obufs[0].l_tail 2650 = com->obuf1 + q_to_b(&tp->t_outq, com->obuf1, 2651 sizeof com->obuf1); 2652 com->obufs[0].l_next = NULL; 2653 com->obufs[0].l_queued = TRUE; 2654 intrsave = save_intr(); 2655 disable_intr(); 2656 COM_LOCK(); 2657 if (com->state & CS_BUSY) { 2658 qp = com->obufq.l_next; 2659 while ((next = qp->l_next) != NULL) 2660 qp = next; 2661 qp->l_next = &com->obufs[0]; 2662 } else { 2663 com->obufq.l_head = com->obufs[0].l_head; 2664 com->obufq.l_tail = com->obufs[0].l_tail; 2665 com->obufq.l_next = &com->obufs[0]; 2666 com->state |= CS_BUSY; 2667 } 2668 COM_UNLOCK(); 2669 restore_intr(intrsave); 2670 } 2671 if (tp->t_outq.c_cc != 0 && !com->obufs[1].l_queued) { 2672 com->obufs[1].l_tail 2673 = com->obuf2 + q_to_b(&tp->t_outq, com->obuf2, 2674 sizeof com->obuf2); 2675 com->obufs[1].l_next = NULL; 2676 com->obufs[1].l_queued = TRUE; 2677 intrsave = save_intr(); 2678 disable_intr(); 2679 COM_LOCK(); 2680 if (com->state & CS_BUSY) { 2681 qp = com->obufq.l_next; 2682 while ((next = qp->l_next) != NULL) 2683 qp = next; 2684 qp->l_next = &com->obufs[1]; 2685 } else { 2686 com->obufq.l_head = com->obufs[1].l_head; 2687 com->obufq.l_tail = com->obufs[1].l_tail; 2688 com->obufq.l_next = &com->obufs[1]; 2689 com->state |= CS_BUSY; 2690 } 2691 COM_UNLOCK(); 2692 restore_intr(intrsave); 2693 } 2694 tp->t_state |= TS_BUSY; 2695 } 2696 intrsave = save_intr(); 2697 disable_intr(); 2698 COM_LOCK(); 2699 if (com->state >= (CS_BUSY | CS_TTGO)) 2700 siointr1(com); /* fake interrupt to start output */ 2701 COM_UNLOCK(); 2702 restore_intr(intrsave); 2703 ttwwakeup(tp); 2704 splx(s); 2705} 2706 2707static void 2708comstop(tp, rw) 2709 struct tty *tp; 2710 int rw; 2711{ 2712 struct com_s *com; 2713 int intrsave; 2714 2715 com = com_addr(DEV_TO_UNIT(tp->t_dev)); 2716 if (com == NULL || com->gone) 2717 return; 2718 intrsave = save_intr(); 2719 disable_intr(); 2720 COM_LOCK(); 2721 if (rw & FWRITE) { 2722 if (com->hasfifo) 2723#ifdef COM_ESP 2724 /* XXX avoid h/w bug. */ 2725 if (!com->esp) 2726#endif 2727 sio_setreg(com, com_fifo, 2728 FIFO_XMT_RST | com->fifo_image); 2729 com->obufs[0].l_queued = FALSE; 2730 com->obufs[1].l_queued = FALSE; 2731 if (com->state & CS_ODONE) 2732 com_events -= LOTS_OF_EVENTS; 2733 com->state &= ~(CS_ODONE | CS_BUSY); 2734 com->tp->t_state &= ~TS_BUSY; 2735 } 2736 if (rw & FREAD) { 2737 if (com->hasfifo) 2738#ifdef COM_ESP 2739 /* XXX avoid h/w bug. */ 2740 if (!com->esp) 2741#endif 2742 sio_setreg(com, com_fifo, 2743 FIFO_RCV_RST | com->fifo_image); 2744 com_events -= (com->iptr - com->ibuf); 2745 com->iptr = com->ibuf; 2746 } 2747 COM_UNLOCK(); 2748 restore_intr(intrsave); 2749 comstart(tp); 2750} 2751 2752static int 2753commctl(com, bits, how) 2754 struct com_s *com; 2755 int bits; 2756 int how; 2757{ 2758 int mcr; 2759 int msr; 2760 int intrsave; 2761 2762 if (how == DMGET) { 2763 bits = TIOCM_LE; /* XXX - always enabled while open */ 2764 mcr = com->mcr_image; 2765 if (mcr & MCR_DTR) 2766 bits |= TIOCM_DTR; 2767 if (mcr & MCR_RTS) 2768 bits |= TIOCM_RTS; 2769 msr = com->prev_modem_status; 2770 if (msr & MSR_CTS) 2771 bits |= TIOCM_CTS; 2772 if (msr & MSR_DCD) 2773 bits |= TIOCM_CD; 2774 if (msr & MSR_DSR) 2775 bits |= TIOCM_DSR; 2776 /* 2777 * XXX - MSR_RI is naturally volatile, and we make MSR_TERI 2778 * more volatile by reading the modem status a lot. Perhaps 2779 * we should latch both bits until the status is read here. 2780 */ 2781 if (msr & (MSR_RI | MSR_TERI)) 2782 bits |= TIOCM_RI; 2783 return (bits); 2784 } 2785 mcr = 0; 2786 if (bits & TIOCM_DTR) 2787 mcr |= MCR_DTR; 2788 if (bits & TIOCM_RTS) 2789 mcr |= MCR_RTS; 2790 if (com->gone) 2791 return(0); 2792 intrsave = save_intr(); 2793 disable_intr(); 2794 COM_LOCK(); 2795 switch (how) { 2796 case DMSET: 2797 outb(com->modem_ctl_port, 2798 com->mcr_image = mcr | (com->mcr_image & MCR_IENABLE)); 2799 break; 2800 case DMBIS: 2801 outb(com->modem_ctl_port, com->mcr_image |= mcr); 2802 break; 2803 case DMBIC: 2804 outb(com->modem_ctl_port, com->mcr_image &= ~mcr); 2805 break; 2806 } 2807 COM_UNLOCK(); 2808 restore_intr(intrsave); 2809 return (0); 2810} 2811 2812static void 2813siosettimeout() 2814{ 2815 struct com_s *com; 2816 bool_t someopen; 2817 int unit; 2818 2819 /* 2820 * Set our timeout period to 1 second if no polled devices are open. 2821 * Otherwise set it to max(1/200, 1/hz). 2822 * Enable timeouts iff some device is open. 2823 */ 2824 untimeout(comwakeup, (void *)NULL, sio_timeout_handle); 2825 sio_timeout = hz; 2826 someopen = FALSE; 2827 for (unit = 0; unit < sio_numunits; ++unit) { 2828 com = com_addr(unit); 2829 if (com != NULL && com->tp != NULL 2830 && com->tp->t_state & TS_ISOPEN && !com->gone) { 2831 someopen = TRUE; 2832 if (com->poll || com->poll_output) { 2833 sio_timeout = hz > 200 ? hz / 200 : 1; 2834 break; 2835 } 2836 } 2837 } 2838 if (someopen) { 2839 sio_timeouts_until_log = hz / sio_timeout; 2840 sio_timeout_handle = timeout(comwakeup, (void *)NULL, 2841 sio_timeout); 2842 } else { 2843 /* Flush error messages, if any. */ 2844 sio_timeouts_until_log = 1; 2845 comwakeup((void *)NULL); 2846 untimeout(comwakeup, (void *)NULL, sio_timeout_handle); 2847 } 2848} 2849 2850static void 2851comwakeup(chan) 2852 void *chan; 2853{ 2854 struct com_s *com; 2855 int unit; 2856 int intrsave; 2857 2858 sio_timeout_handle = timeout(comwakeup, (void *)NULL, sio_timeout); 2859 2860 /* 2861 * Recover from lost output interrupts. 2862 * Poll any lines that don't use interrupts. 2863 */ 2864 for (unit = 0; unit < sio_numunits; ++unit) { 2865 com = com_addr(unit); 2866 if (com != NULL && !com->gone 2867 && (com->state >= (CS_BUSY | CS_TTGO) || com->poll)) { 2868 intrsave = save_intr(); 2869 disable_intr(); 2870 COM_LOCK(); 2871 siointr1(com); 2872 COM_UNLOCK(); 2873 restore_intr(intrsave); 2874 } 2875 } 2876 2877 /* 2878 * Check for and log errors, but not too often. 2879 */ 2880 if (--sio_timeouts_until_log > 0) 2881 return; 2882 sio_timeouts_until_log = hz / sio_timeout; 2883 for (unit = 0; unit < sio_numunits; ++unit) { 2884 int errnum; 2885 2886 com = com_addr(unit); 2887 if (com == NULL) 2888 continue; 2889 if (com->gone) 2890 continue; 2891 for (errnum = 0; errnum < CE_NTYPES; ++errnum) { 2892 u_int delta; 2893 u_long total; 2894 2895 intrsave = save_intr(); 2896 disable_intr(); 2897 COM_LOCK(); 2898 delta = com->delta_error_counts[errnum]; 2899 com->delta_error_counts[errnum] = 0; 2900 COM_UNLOCK(); 2901 restore_intr(intrsave); 2902 if (delta == 0) 2903 continue; 2904 total = com->error_counts[errnum] += delta; 2905 log(LOG_ERR, "sio%d: %u more %s%s (total %lu)\n", 2906 unit, delta, error_desc[errnum], 2907 delta == 1 ? "" : "s", total); 2908 } 2909 } 2910} 2911 2912static void 2913disc_optim(tp, t, com) 2914 struct tty *tp; 2915 struct termios *t; 2916 struct com_s *com; 2917{ 2918 if (!(t->c_iflag & (ICRNL | IGNCR | IMAXBEL | INLCR | ISTRIP | IXON)) 2919 && (!(t->c_iflag & BRKINT) || (t->c_iflag & IGNBRK)) 2920 && (!(t->c_iflag & PARMRK) 2921 || (t->c_iflag & (IGNPAR | IGNBRK)) == (IGNPAR | IGNBRK)) 2922 && !(t->c_lflag & (ECHO | ICANON | IEXTEN | ISIG | PENDIN)) 2923 && linesw[tp->t_line].l_rint == ttyinput) 2924 tp->t_state |= TS_CAN_BYPASS_L_RINT; 2925 else 2926 tp->t_state &= ~TS_CAN_BYPASS_L_RINT; 2927 com->hotchar = linesw[tp->t_line].l_hotchar; 2928} 2929 2930/* 2931 * Following are all routines needed for SIO to act as console 2932 */ 2933#include <sys/cons.h> 2934 2935struct siocnstate { 2936 u_char dlbl; 2937 u_char dlbh; 2938 u_char ier; 2939 u_char cfcr; 2940 u_char mcr; 2941}; 2942 2943#ifndef __alpha__ 2944static speed_t siocngetspeed __P((Port_t, struct speedtab *)); 2945#endif 2946static void siocnclose __P((struct siocnstate *sp, Port_t iobase)); 2947static void siocnopen __P((struct siocnstate *sp, Port_t iobase, int speed)); 2948static void siocntxwait __P((Port_t iobase)); 2949 2950#ifdef __alpha__ 2951int siocnattach __P((int port, int speed)); 2952int siogdbattach __P((int port, int speed)); 2953int siogdbgetc __P((void)); 2954void siogdbputc __P((int c)); 2955#else 2956static cn_probe_t siocnprobe; 2957static cn_init_t siocninit; 2958#endif 2959static cn_checkc_t siocncheckc; 2960static cn_getc_t siocngetc; 2961static cn_putc_t siocnputc; 2962 2963#ifdef __i386__ 2964CONS_DRIVER(sio, siocnprobe, siocninit, NULL, siocngetc, siocncheckc, 2965 siocnputc, NULL); 2966#endif 2967 2968/* To get the GDB related variables */ 2969#if DDB > 0 2970#include <ddb/ddb.h> 2971#endif 2972 2973static void 2974siocntxwait(iobase) 2975 Port_t iobase; 2976{ 2977 int timo; 2978 2979 /* 2980 * Wait for any pending transmission to finish. Required to avoid 2981 * the UART lockup bug when the speed is changed, and for normal 2982 * transmits. 2983 */ 2984 timo = 100000; 2985 while ((inb(iobase + com_lsr) & (LSR_TSRE | LSR_TXRDY)) 2986 != (LSR_TSRE | LSR_TXRDY) && --timo != 0) 2987 ; 2988} 2989 2990#ifndef __alpha__ 2991 2992/* 2993 * Read the serial port specified and try to figure out what speed 2994 * it's currently running at. We're assuming the serial port has 2995 * been initialized and is basicly idle. This routine is only intended 2996 * to be run at system startup. 2997 * 2998 * If the value read from the serial port doesn't make sense, return 0. 2999 */ 3000 3001static speed_t 3002siocngetspeed(iobase, table) 3003 Port_t iobase; 3004 struct speedtab *table; 3005{ 3006 int code; 3007 u_char dlbh; 3008 u_char dlbl; 3009 u_char cfcr; 3010 3011 cfcr = inb(iobase + com_cfcr); 3012 outb(iobase + com_cfcr, CFCR_DLAB | cfcr); 3013 3014 dlbl = inb(iobase + com_dlbl); 3015 dlbh = inb(iobase + com_dlbh); 3016 3017 outb(iobase + com_cfcr, cfcr); 3018 3019 code = dlbh << 8 | dlbl; 3020 3021 for (; table->sp_speed != -1; table++) 3022 if (table->sp_code == code) 3023 return (table->sp_speed); 3024 3025 return (0); /* didn't match anything sane */ 3026} 3027 3028#endif 3029 3030static void 3031siocnopen(sp, iobase, speed) 3032 struct siocnstate *sp; 3033 Port_t iobase; 3034 int speed; 3035{ 3036 int divisor; 3037 u_char dlbh; 3038 u_char dlbl; 3039 3040 /* 3041 * Save all the device control registers except the fifo register 3042 * and set our default ones (cs8 -parenb speed=comdefaultrate). 3043 * We can't save the fifo register since it is read-only. 3044 */ 3045 sp->ier = inb(iobase + com_ier); 3046 outb(iobase + com_ier, 0); /* spltty() doesn't stop siointr() */ 3047 siocntxwait(iobase); 3048 sp->cfcr = inb(iobase + com_cfcr); 3049 outb(iobase + com_cfcr, CFCR_DLAB | CFCR_8BITS); 3050 sp->dlbl = inb(iobase + com_dlbl); 3051 sp->dlbh = inb(iobase + com_dlbh); 3052 /* 3053 * Only set the divisor registers if they would change, since on 3054 * some 16550 incompatibles (Startech), setting them clears the 3055 * data input register. This also reduces the effects of the 3056 * UMC8669F bug. 3057 */ 3058 divisor = ttspeedtab(speed, comspeedtab); 3059 dlbl = divisor & 0xFF; 3060 if (sp->dlbl != dlbl) 3061 outb(iobase + com_dlbl, dlbl); 3062 dlbh = (u_int) divisor >> 8; 3063 if (sp->dlbh != dlbh) 3064 outb(iobase + com_dlbh, dlbh); 3065 outb(iobase + com_cfcr, CFCR_8BITS); 3066 sp->mcr = inb(iobase + com_mcr); 3067 /* 3068 * We don't want interrupts, but must be careful not to "disable" 3069 * them by clearing the MCR_IENABLE bit, since that might cause 3070 * an interrupt by floating the IRQ line. 3071 */ 3072 outb(iobase + com_mcr, (sp->mcr & MCR_IENABLE) | MCR_DTR | MCR_RTS); 3073} 3074 3075static void 3076siocnclose(sp, iobase) 3077 struct siocnstate *sp; 3078 Port_t iobase; 3079{ 3080 /* 3081 * Restore the device control registers. 3082 */ 3083 siocntxwait(iobase); 3084 outb(iobase + com_cfcr, CFCR_DLAB | CFCR_8BITS); 3085 if (sp->dlbl != inb(iobase + com_dlbl)) 3086 outb(iobase + com_dlbl, sp->dlbl); 3087 if (sp->dlbh != inb(iobase + com_dlbh)) 3088 outb(iobase + com_dlbh, sp->dlbh); 3089 outb(iobase + com_cfcr, sp->cfcr); 3090 /* 3091 * XXX damp oscillations of MCR_DTR and MCR_RTS by not restoring them. 3092 */ 3093 outb(iobase + com_mcr, sp->mcr | MCR_DTR | MCR_RTS); 3094 outb(iobase + com_ier, sp->ier); 3095} 3096 3097#ifndef __alpha__ 3098 3099static void 3100siocnprobe(cp) 3101 struct consdev *cp; 3102{ 3103 speed_t boot_speed; 3104 u_char cfcr; 3105 int s, unit; 3106 struct siocnstate sp; 3107 3108 /* 3109 * Find our first enabled console, if any. If it is a high-level 3110 * console device, then initialize it and return successfully. 3111 * If it is a low-level console device, then initialize it and 3112 * return unsuccessfully. It must be initialized in both cases 3113 * for early use by console drivers and debuggers. Initializing 3114 * the hardware is not necessary in all cases, since the i/o 3115 * routines initialize it on the fly, but it is necessary if 3116 * input might arrive while the hardware is switched back to an 3117 * uninitialized state. We can't handle multiple console devices 3118 * yet because our low-level routines don't take a device arg. 3119 * We trust the user to set the console flags properly so that we 3120 * don't need to probe. 3121 */ 3122 cp->cn_pri = CN_DEAD; 3123 3124 for (unit = 0; unit < 16; unit++) { /* XXX need to know how many */ 3125 int flags; 3126 int disabled; 3127 if (resource_int_value("sio", unit, "disabled", &disabled) == 0) { 3128 if (disabled) 3129 continue; 3130 } 3131 if (resource_int_value("sio", unit, "flags", &flags)) 3132 continue; 3133 if (COM_CONSOLE(flags) || COM_DEBUGGER(flags)) { 3134 int port; 3135 Port_t iobase; 3136 3137 if (resource_int_value("sio", unit, "port", &port)) 3138 continue; 3139 iobase = port; 3140 s = spltty(); 3141 if (boothowto & RB_SERIAL) { 3142 boot_speed = siocngetspeed(iobase, comspeedtab); 3143 if (boot_speed) 3144 comdefaultrate = boot_speed; 3145 } 3146 3147 /* 3148 * Initialize the divisor latch. We can't rely on 3149 * siocnopen() to do this the first time, since it 3150 * avoids writing to the latch if the latch appears 3151 * to have the correct value. Also, if we didn't 3152 * just read the speed from the hardware, then we 3153 * need to set the speed in hardware so that 3154 * switching it later is null. 3155 */ 3156 cfcr = inb(iobase + com_cfcr); 3157 outb(iobase + com_cfcr, CFCR_DLAB | cfcr); 3158 outb(iobase + com_dlbl, 3159 COMBRD(comdefaultrate) & 0xff); 3160 outb(iobase + com_dlbh, 3161 (u_int) COMBRD(comdefaultrate) >> 8); 3162 outb(iobase + com_cfcr, cfcr); 3163 3164 siocnopen(&sp, iobase, comdefaultrate); 3165 3166 splx(s); 3167 if (COM_CONSOLE(flags) && !COM_LLCONSOLE(flags)) { 3168 cp->cn_dev = makedev(CDEV_MAJOR, unit); 3169 cp->cn_pri = COM_FORCECONSOLE(flags) 3170 || boothowto & RB_SERIAL 3171 ? CN_REMOTE : CN_NORMAL; 3172 siocniobase = iobase; 3173 siocnunit = unit; 3174 } 3175 if (COM_DEBUGGER(flags)) { 3176 printf("sio%d: gdb debugging port\n", unit); 3177 siogdbiobase = iobase; 3178 siogdbunit = unit; 3179#if DDB > 0 3180 gdbdev = makedev(CDEV_MAJOR, unit); 3181 gdb_getc = siocngetc; 3182 gdb_putc = siocnputc; 3183#endif 3184 } 3185 } 3186 } 3187#ifdef __i386__ 3188#if DDB > 0 3189 /* 3190 * XXX Ugly Compatability. 3191 * If no gdb port has been specified, set it to be the console 3192 * as some configuration files don't specify the gdb port. 3193 */ 3194 if (gdbdev == NODEV && (boothowto & RB_GDB)) { 3195 printf("Warning: no GDB port specified. Defaulting to sio%d.\n", 3196 siocnunit); 3197 printf("Set flag 0x80 on desired GDB port in your\n"); 3198 printf("configuration file (currently sio only).\n"); 3199 siogdbiobase = siocniobase; 3200 siogdbunit = siocnunit; 3201 gdbdev = makedev(CDEV_MAJOR, siocnunit); 3202 gdb_getc = siocngetc; 3203 gdb_putc = siocnputc; 3204 } 3205#endif 3206#endif 3207} 3208 3209static void 3210siocninit(cp) 3211 struct consdev *cp; 3212{ 3213 comconsole = DEV_TO_UNIT(cp->cn_dev); 3214} 3215 3216#endif 3217 3218#ifdef __alpha__ 3219 3220CONS_DRIVER(sio, NULL, NULL, NULL, siocngetc, siocncheckc, siocnputc, NULL); 3221 3222int 3223siocnattach(port, speed) 3224 int port; 3225 int speed; 3226{ 3227 int s; 3228 u_char cfcr; 3229 struct siocnstate sp; 3230 3231 siocniobase = port; 3232 comdefaultrate = speed; 3233 sio_consdev.cn_pri = CN_NORMAL; 3234 sio_consdev.cn_dev = makedev(CDEV_MAJOR, 0); 3235 3236 s = spltty(); 3237 3238 /* 3239 * Initialize the divisor latch. We can't rely on 3240 * siocnopen() to do this the first time, since it 3241 * avoids writing to the latch if the latch appears 3242 * to have the correct value. Also, if we didn't 3243 * just read the speed from the hardware, then we 3244 * need to set the speed in hardware so that 3245 * switching it later is null. 3246 */ 3247 cfcr = inb(siocniobase + com_cfcr); 3248 outb(siocniobase + com_cfcr, CFCR_DLAB | cfcr); 3249 outb(siocniobase + com_dlbl, 3250 COMBRD(comdefaultrate) & 0xff); 3251 outb(siocniobase + com_dlbh, 3252 (u_int) COMBRD(comdefaultrate) >> 8); 3253 outb(siocniobase + com_cfcr, cfcr); 3254 3255 siocnopen(&sp, siocniobase, comdefaultrate); 3256 splx(s); 3257 3258 cn_tab = &sio_consdev; 3259 return (0); 3260} 3261 3262int 3263siogdbattach(port, speed) 3264 int port; 3265 int speed; 3266{ 3267 int s; 3268 u_char cfcr; 3269 struct siocnstate sp; 3270 int unit = 1; /* XXX !!! */ 3271 3272 siogdbiobase = port; 3273 gdbdefaultrate = speed; 3274 3275 printf("sio%d: gdb debugging port\n", unit); 3276 siogdbunit = unit; 3277#if DDB > 0 3278 gdbdev = makedev(CDEV_MAJOR, unit); 3279 gdb_getc = siocngetc; 3280 gdb_putc = siocnputc; 3281#endif 3282 3283 s = spltty(); 3284 3285 /* 3286 * Initialize the divisor latch. We can't rely on 3287 * siocnopen() to do this the first time, since it 3288 * avoids writing to the latch if the latch appears 3289 * to have the correct value. Also, if we didn't 3290 * just read the speed from the hardware, then we 3291 * need to set the speed in hardware so that 3292 * switching it later is null. 3293 */ 3294 cfcr = inb(siogdbiobase + com_cfcr); 3295 outb(siogdbiobase + com_cfcr, CFCR_DLAB | cfcr); 3296 outb(siogdbiobase + com_dlbl, 3297 COMBRD(gdbdefaultrate) & 0xff); 3298 outb(siogdbiobase + com_dlbh, 3299 (u_int) COMBRD(gdbdefaultrate) >> 8); 3300 outb(siogdbiobase + com_cfcr, cfcr); 3301 3302 siocnopen(&sp, siogdbiobase, gdbdefaultrate); 3303 splx(s); 3304 3305 return (0); 3306} 3307 3308#endif 3309 3310static int 3311siocncheckc(dev) 3312 dev_t dev; 3313{ 3314 int c; 3315 Port_t iobase; 3316 int s; 3317 struct siocnstate sp; 3318 3319 if (minor(dev) == siogdbunit) 3320 iobase = siogdbiobase; 3321 else 3322 iobase = siocniobase; 3323 s = spltty(); 3324 siocnopen(&sp, iobase, comdefaultrate); 3325 if (inb(iobase + com_lsr) & LSR_RXRDY) 3326 c = inb(iobase + com_data); 3327 else 3328 c = -1; 3329 siocnclose(&sp, iobase); 3330 splx(s); 3331 return (c); 3332} 3333 3334 3335int 3336siocngetc(dev) 3337 dev_t dev; 3338{ 3339 int c; 3340 Port_t iobase; 3341 int s; 3342 struct siocnstate sp; 3343 3344 if (minor(dev) == siogdbunit) 3345 iobase = siogdbiobase; 3346 else 3347 iobase = siocniobase; 3348 s = spltty(); 3349 siocnopen(&sp, iobase, comdefaultrate); 3350 while (!(inb(iobase + com_lsr) & LSR_RXRDY)) 3351 ; 3352 c = inb(iobase + com_data); 3353 siocnclose(&sp, iobase); 3354 splx(s); 3355 return (c); 3356} 3357 3358void 3359siocnputc(dev, c) 3360 dev_t dev; 3361 int c; 3362{ 3363 int s; 3364 struct siocnstate sp; 3365 Port_t iobase; 3366 3367 if (minor(dev) == siogdbunit) 3368 iobase = siogdbiobase; 3369 else 3370 iobase = siocniobase; 3371 s = spltty(); 3372 siocnopen(&sp, iobase, comdefaultrate); 3373 siocntxwait(iobase); 3374 outb(iobase + com_data, c); 3375 siocnclose(&sp, iobase); 3376 splx(s); 3377} 3378 3379#ifdef __alpha__ 3380int 3381siogdbgetc() 3382{ 3383 int c; 3384 Port_t iobase; 3385 int s; 3386 struct siocnstate sp; 3387 3388 iobase = siogdbiobase; 3389 s = spltty(); 3390 siocnopen(&sp, iobase, gdbdefaultrate); 3391 while (!(inb(iobase + com_lsr) & LSR_RXRDY)) 3392 ; 3393 c = inb(iobase + com_data); 3394 siocnclose(&sp, iobase); 3395 splx(s); 3396 return (c); 3397} 3398 3399void 3400siogdbputc(c) 3401 int c; 3402{ 3403 int s; 3404 struct siocnstate sp; 3405 3406 s = spltty(); 3407 siocnopen(&sp, siogdbiobase, gdbdefaultrate); 3408 siocntxwait(siogdbiobase); 3409 outb(siogdbiobase + com_data, c); 3410 siocnclose(&sp, siogdbiobase); 3411 splx(s); 3412} 3413#endif 3414 3415DRIVER_MODULE(sio, isa, sio_isa_driver, sio_devclass, 0, 0); 3416#if NCARD > 0 3417DRIVER_MODULE(sio, pccard, sio_pccard_driver, sio_devclass, 0, 0); 3418#endif 3419#if NPCI > 0 3420DRIVER_MODULE(sio, pci, sio_pci_driver, sio_devclass, 0, 0); 3421#endif 3422