1 /*- 2 * (MPSAFE) 3 * 4 * Copyright (c) 1991 The Regents of the University of California. 5 * All rights reserved. 6 * 7 * Redistribution and use in source and binary forms, with or without 8 * modification, are permitted provided that the following conditions 9 * are met: 10 * 1. Redistributions of source code must retain the above copyright 11 * notice, this list of conditions and the following disclaimer. 12 * 2. Redistributions in binary form must reproduce the above copyright 13 * notice, this list of conditions and the following disclaimer in the 14 * documentation and/or other materials provided with the distribution. 15 * 3. All advertising materials mentioning features or use of this software 16 * must display the following acknowledgement: 17 * This product includes software developed by the University of 18 * California, Berkeley and its contributors. 19 * 4. Neither the name of the University nor the names of its contributors 20 * may be used to endorse or promote products derived from this software 21 * without specific prior written permission. 22 * 23 * THIS SOFTWARE IS PROVIDED BY THE REGENTS AND CONTRIBUTORS ``AS IS'' AND 24 * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE 25 * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE 26 * ARE DISCLAIMED. IN NO EVENT SHALL THE REGENTS OR CONTRIBUTORS BE LIABLE 27 * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL 28 * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS 29 * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) 30 * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT 31 * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY 32 * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF 33 * SUCH DAMAGE. 34 * 35 * $FreeBSD: src/sys/isa/sio.c,v 1.291.2.35 2003/05/18 08:51:15 murray Exp $ 36 * from: @(#)com.c 7.5 (Berkeley) 5/16/91 37 * from: i386/isa sio.c,v 1.234 38 */ 39 40 #include "opt_comconsole.h" 41 #include "opt_compat.h" 42 #include "opt_ddb.h" 43 #include "opt_sio.h" 44 #include "use_pci.h" 45 #include "use_puc.h" 46 47 /* 48 * Serial driver, based on 386BSD-0.1 com driver. 49 * Mostly rewritten to use pseudo-DMA. 50 * Works for National Semiconductor NS8250-NS16550AF UARTs. 51 * COM driver, based on HP dca driver. 52 * 53 * Changes for PC-Card integration: 54 * - Added PC-Card driver table and handlers 55 */ 56 #include <sys/param.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/priv.h> 63 #include <sys/module.h> 64 #include <sys/conf.h> 65 #include <sys/dkstat.h> 66 #include <sys/fcntl.h> 67 #include <sys/interrupt.h> 68 #include <sys/kernel.h> 69 #include <sys/syslog.h> 70 #include <sys/sysctl.h> 71 #include <sys/bus.h> 72 #include <sys/rman.h> 73 #include <sys/timepps.h> 74 #include <sys/thread2.h> 75 #include <sys/devfs.h> 76 #include <sys/consio.h> 77 78 #include <machine/limits.h> 79 80 #include <bus/isa/isareg.h> 81 #include <bus/isa/isavar.h> 82 #if NPCI > 0 83 #include <bus/pci/pcireg.h> 84 #include <bus/pci/pcivar.h> 85 #endif 86 #if NPUC > 0 87 #include <dev/misc/puc/pucvar.h> 88 #endif 89 #include <machine/lock.h> 90 91 #include <machine/clock.h> 92 93 #include "sioreg.h" 94 #include "sio_private.h" 95 96 #ifdef COM_ESP 97 #include "../ic_layer/esp.h" 98 #endif 99 100 #define LOTS_OF_EVENTS 64 /* helps separate urgent events from input */ 101 102 #define CALLOUT_MASK 0x80 103 #define CONTROL_MASK 0x60 104 #define CONTROL_INIT_STATE 0x20 105 #define CONTROL_LOCK_STATE 0x40 106 #define DEV_TO_UNIT(dev) (MINOR_TO_UNIT(minor(dev))) 107 #define MINOR_TO_UNIT(mynor) ((((mynor) & ~0xffffU) >> (8 + 3)) \ 108 | ((mynor) & 0x1f)) 109 #define UNIT_TO_MINOR(unit) ((((unit) & ~0x1fU) << (8 + 3)) \ 110 | ((unit) & 0x1f)) 111 112 #define com_scr 7 /* scratch register for 16450-16550 (R/W) */ 113 114 #define sio_getreg(com, off) \ 115 (bus_space_read_1((com)->bst, (com)->bsh, (off))) 116 #define sio_setreg(com, off, value) \ 117 (bus_space_write_1((com)->bst, (com)->bsh, (off), (value))) 118 119 /* 120 * com state bits. 121 * (CS_BUSY | CS_TTGO) and (CS_BUSY | CS_TTGO | CS_ODEVREADY) must be higher 122 * than the other bits so that they can be tested as a group without masking 123 * off the low bits. 124 * 125 * The following com and tty flags correspond closely: 126 * CS_BUSY = TS_BUSY (maintained by comstart(), siopoll() and 127 * comstop()) 128 * CS_TTGO = ~TS_TTSTOP (maintained by comparam() and comstart()) 129 * CS_CTS_OFLOW = CCTS_OFLOW (maintained by comparam()) 130 * CS_RTS_IFLOW = CRTS_IFLOW (maintained by comparam()) 131 * TS_FLUSH is not used. 132 * XXX I think TIOCSETA doesn't clear TS_TTSTOP when it clears IXON. 133 * XXX CS_*FLOW should be CF_*FLOW in com->flags (control flags not state). 134 */ 135 #define CS_BUSY 0x80 /* output in progress */ 136 #define CS_TTGO 0x40 /* output not stopped by XOFF */ 137 #define CS_ODEVREADY 0x20 /* external device h/w ready (CTS) */ 138 #define CS_CHECKMSR 1 /* check of MSR scheduled */ 139 #define CS_CTS_OFLOW 2 /* use CTS output flow control */ 140 #define CS_DTR_OFF 0x10 /* DTR held off */ 141 #define CS_ODONE 4 /* output completed */ 142 #define CS_RTS_IFLOW 8 /* use RTS input flow control */ 143 #define CSE_BUSYCHECK 1 /* siobusycheck() scheduled */ 144 145 static char const * const error_desc[] = { 146 #define CE_OVERRUN 0 147 "silo overflow", 148 #define CE_INTERRUPT_BUF_OVERFLOW 1 149 "interrupt-level buffer overflow", 150 #define CE_TTY_BUF_OVERFLOW 2 151 "tty-level buffer overflow", 152 }; 153 154 #ifdef COM_ESP 155 static int espattach (struct com_s *com, Port_t esp_port); 156 #endif 157 static int sio_isa_attach (device_t dev); 158 159 static timeout_t siobusycheck; 160 static u_int siodivisor (u_long rclk, speed_t speed); 161 static timeout_t siodtrwakeup; 162 static void comhardclose (struct com_s *com); 163 static void sioinput (struct com_s *com); 164 static void siointr1 (struct com_s *com); 165 static void siointr (void *arg); 166 static int commctl (struct com_s *com, int bits, int how); 167 static int comparam (struct tty *tp, struct termios *t); 168 static inthand2_t siopoll; 169 static int sio_isa_probe (device_t dev); 170 static void siosettimeout (void); 171 static int siosetwater (struct com_s *com, speed_t speed); 172 static void comstart (struct tty *tp); 173 static void comstop (struct tty *tp, int rw); 174 static timeout_t comwakeup; 175 static void disc_optim (struct tty *tp, struct termios *t, 176 struct com_s *com); 177 178 #if NPCI > 0 179 static int sio_pci_attach (device_t dev); 180 static void sio_pci_kludge_unit (device_t dev); 181 static int sio_pci_probe (device_t dev); 182 #endif /* NPCI > 0 */ 183 184 #if NPUC > 0 185 static int sio_puc_attach (device_t dev); 186 static int sio_puc_probe (device_t dev); 187 #endif /* NPUC > 0 */ 188 189 static char driver_name[] = "sio"; 190 191 /* table and macro for fast conversion from a unit number to its com struct */ 192 devclass_t sio_devclass; 193 #define com_addr(unit) ((struct com_s *) \ 194 devclass_get_softc(sio_devclass, unit)) 195 196 static device_method_t sio_isa_methods[] = { 197 /* Device interface */ 198 DEVMETHOD(device_probe, sio_isa_probe), 199 DEVMETHOD(device_attach, sio_isa_attach), 200 201 DEVMETHOD_END 202 }; 203 204 static driver_t sio_isa_driver = { 205 driver_name, 206 sio_isa_methods, 207 sizeof(struct com_s), 208 }; 209 210 #if NPCI > 0 211 static device_method_t sio_pci_methods[] = { 212 /* Device interface */ 213 DEVMETHOD(device_probe, sio_pci_probe), 214 DEVMETHOD(device_attach, sio_pci_attach), 215 216 DEVMETHOD_END 217 }; 218 219 static driver_t sio_pci_driver = { 220 driver_name, 221 sio_pci_methods, 222 sizeof(struct com_s), 223 }; 224 #endif /* NPCI > 0 */ 225 226 #if NPUC > 0 227 static device_method_t sio_puc_methods[] = { 228 /* Device interface */ 229 DEVMETHOD(device_probe, sio_puc_probe), 230 DEVMETHOD(device_attach, sio_puc_attach), 231 232 DEVMETHOD_END 233 }; 234 235 static driver_t sio_puc_driver = { 236 driver_name, 237 sio_puc_methods, 238 sizeof(struct com_s), 239 }; 240 #endif /* NPUC > 0 */ 241 242 static d_open_t sioopen; 243 static d_close_t sioclose; 244 static d_read_t sioread; 245 static d_write_t siowrite; 246 static d_ioctl_t sioioctl; 247 248 static struct dev_ops sio_ops = { 249 { driver_name, 0, D_TTY }, 250 .d_open = sioopen, 251 .d_close = sioclose, 252 .d_read = sioread, 253 .d_write = siowrite, 254 .d_ioctl = sioioctl, 255 .d_kqfilter = ttykqfilter, 256 .d_revoke = ttyrevoke 257 }; 258 259 int comconsole = -1; 260 static volatile speed_t comdefaultrate = CONSPEED; 261 static u_long comdefaultrclk = DEFAULT_RCLK; 262 SYSCTL_ULONG(_machdep, OID_AUTO, conrclk, CTLFLAG_RW, &comdefaultrclk, 0, ""); 263 static u_int com_events; /* input chars + weighted output completions */ 264 static Port_t siocniobase; 265 static int siocnunit; 266 static Port_t siogdbiobase; 267 static int siogdbunit = -1; 268 static bool_t sio_registered; 269 static int sio_timeout; 270 static int sio_timeouts_until_log; 271 static struct callout sio_timeout_handle; 272 static int sio_numunits; 273 274 #ifdef COM_ESP 275 /* XXX configure this properly. */ 276 static Port_t likely_com_ports[] = { 0x3f8, 0x2f8, 0x3e8, 0x2e8, }; 277 static Port_t likely_esp_ports[] = { 0x140, 0x180, 0x280, 0 }; 278 #endif 279 280 /* 281 * handle sysctl read/write requests for console speed 282 * 283 * In addition to setting comdefaultrate for I/O through /dev/console, 284 * also set the initial and lock values for the /dev/ttyXX device 285 * if there is one associated with the console. Finally, if the /dev/tty 286 * device has already been open, change the speed on the open running port 287 * itself. 288 */ 289 290 static int 291 sysctl_machdep_comdefaultrate(SYSCTL_HANDLER_ARGS) 292 { 293 int error; 294 speed_t newspeed; 295 struct com_s *com; 296 struct tty *tp; 297 298 lwkt_gettoken(&tty_token); 299 newspeed = comdefaultrate; 300 301 error = sysctl_handle_opaque(oidp, &newspeed, sizeof newspeed, req); 302 if (error || !req->newptr) { 303 lwkt_reltoken(&tty_token); 304 return (error); 305 } 306 307 comdefaultrate = newspeed; 308 309 if (comconsole < 0) { /* serial console not selected? */ 310 lwkt_reltoken(&tty_token); 311 return (0); 312 } 313 314 com = com_addr(comconsole); 315 if (com == NULL) { 316 lwkt_reltoken(&tty_token); 317 return (ENXIO); 318 } 319 320 /* 321 * set the initial and lock rates for /dev/ttydXX and /dev/cuaXX 322 * (note, the lock rates really are boolean -- if non-zero, disallow 323 * speed changes) 324 */ 325 com->it_in.c_ispeed = com->it_in.c_ospeed = 326 com->lt_in.c_ispeed = com->lt_in.c_ospeed = 327 com->it_out.c_ispeed = com->it_out.c_ospeed = 328 com->lt_out.c_ispeed = com->lt_out.c_ospeed = comdefaultrate; 329 330 /* 331 * if we're open, change the running rate too 332 */ 333 tp = com->tp; 334 if (tp && (tp->t_state & TS_ISOPEN)) { 335 tp->t_termios.c_ispeed = 336 tp->t_termios.c_ospeed = comdefaultrate; 337 crit_enter(); 338 error = comparam(tp, &tp->t_termios); 339 crit_exit(); 340 } 341 lwkt_reltoken(&tty_token); 342 return error; 343 } 344 345 SYSCTL_PROC(_machdep, OID_AUTO, conspeed, CTLTYPE_INT | CTLFLAG_RW, 346 0, 0, sysctl_machdep_comdefaultrate, "I", ""); 347 348 #if NPCI > 0 349 struct pci_ids { 350 u_int32_t type; 351 const char *desc; 352 int rid; 353 }; 354 355 static struct pci_ids pci_ids[] = { 356 { 0x100812b9, "3COM PCI FaxModem", 0x10 }, 357 { 0x2000131f, "CyberSerial (1-port) 16550", 0x10 }, 358 { 0x01101407, "Koutech IOFLEX-2S PCI Dual Port Serial", 0x10 }, 359 { 0x01111407, "Koutech IOFLEX-2S PCI Dual Port Serial", 0x10 }, 360 { 0x048011c1, "Lucent kermit based PCI Modem", 0x14 }, 361 { 0x95211415, "Oxford Semiconductor PCI Dual Port Serial", 0x10 }, 362 { 0x7101135e, "SeaLevel Ultra 530.PCI Single Port Serial", 0x18 }, 363 { 0x0000151f, "SmartLink 5634PCV SurfRider", 0x10 }, 364 { 0x98459710, "Netmos Nm9845 PCI Bridge with Dual UART", 0x10 }, 365 { 0x00000000, NULL, 0 } 366 }; 367 368 static int 369 sio_pci_attach(device_t dev) 370 { 371 u_int32_t type; 372 struct pci_ids *id; 373 374 type = pci_get_devid(dev); 375 id = pci_ids; 376 while (id->type && id->type != type) 377 id++; 378 if (id->desc == NULL) 379 return (ENXIO); 380 sio_pci_kludge_unit(dev); 381 return (sioattach(dev, id->rid, 0UL)); 382 } 383 384 /* 385 * Don't cut and paste this to other drivers. It is a horrible kludge 386 * which will fail to work and also be unnecessary in future versions. 387 */ 388 static void 389 sio_pci_kludge_unit(device_t dev) 390 { 391 devclass_t dc; 392 int err; 393 int start; 394 int unit; 395 396 unit = 0; 397 start = 0; 398 while (resource_int_value("sio", unit, "port", &start) == 0 && 399 start > 0) 400 unit++; 401 if (device_get_unit(dev) < unit) { 402 dc = device_get_devclass(dev); 403 while (devclass_get_device(dc, unit)) 404 unit++; 405 device_printf(dev, "moving to sio%d\n", unit); 406 err = device_set_unit(dev, unit); /* EVIL DO NOT COPY */ 407 if (err) 408 device_printf(dev, "error moving device %d\n", err); 409 } 410 } 411 412 static int 413 sio_pci_probe(device_t dev) 414 { 415 u_int32_t type; 416 struct pci_ids *id; 417 418 type = pci_get_devid(dev); 419 id = pci_ids; 420 while (id->type && id->type != type) 421 id++; 422 if (id->desc == NULL) 423 return (ENXIO); 424 device_set_desc(dev, id->desc); 425 return (sioprobe(dev, id->rid, 0UL)); 426 } 427 #endif /* NPCI > 0 */ 428 429 #if NPUC > 0 430 static int 431 sio_puc_attach(device_t dev) 432 { 433 uintptr_t rclk; 434 435 if (BUS_READ_IVAR(device_get_parent(dev), dev, PUC_IVAR_FREQ, 436 &rclk) != 0) 437 rclk = DEFAULT_RCLK; 438 return (sioattach(dev, 0, rclk)); 439 } 440 441 static int 442 sio_puc_probe(device_t dev) 443 { 444 uintptr_t rclk; 445 446 if (BUS_READ_IVAR(device_get_parent(dev), dev, PUC_IVAR_FREQ, 447 &rclk) != 0) 448 rclk = DEFAULT_RCLK; 449 return (sioprobe(dev, 0, rclk)); 450 } 451 #endif /* NPUC */ 452 453 static struct isa_pnp_id sio_ids[] = { 454 {0x0005d041, "Standard PC COM port"}, /* PNP0500 */ 455 {0x0105d041, "16550A-compatible COM port"}, /* PNP0501 */ 456 {0x0205d041, "Multiport serial device (non-intelligent 16550)"}, /* PNP0502 */ 457 {0x1005d041, "Generic IRDA-compatible device"}, /* PNP0510 */ 458 {0x1105d041, "Generic IRDA-compatible device"}, /* PNP0511 */ 459 /* Devices that do not have a compatid */ 460 {0x12206804, NULL}, /* ACH2012 - 5634BTS 56K Video Ready Modem */ 461 {0x7602a904, NULL}, /* AEI0276 - 56K v.90 Fax Modem (LKT) */ 462 {0x00007905, NULL}, /* AKY0000 - 56K Plug&Play Modem */ 463 {0x21107905, NULL}, /* AKY1021 - 56K Plug&Play Modem */ 464 {0x01405407, NULL}, /* AZT4001 - AZT3000 PnP SOUND DEVICE, MODEM */ 465 {0x56039008, NULL}, /* BDP0356 - Best Data 56x2 */ 466 {0x56159008, NULL}, /* BDP1556 - B.D. Smart One 56SPS,Voice Modem*/ 467 {0x36339008, NULL}, /* BDP3336 - Best Data Prods. 336F */ 468 {0x0014490a, NULL}, /* BRI1400 - Boca 33.6 PnP */ 469 {0x0015490a, NULL}, /* BRI1500 - Internal Fax Data */ 470 {0x0034490a, NULL}, /* BRI3400 - Internal ACF Modem */ 471 {0x0094490a, NULL}, /* BRI9400 - Boca K56Flex PnP */ 472 {0x00b4490a, NULL}, /* BRIB400 - Boca 56k PnP */ 473 {0x0030320d, NULL}, /* CIR3000 - Cirrus Logic V43 */ 474 {0x0100440e, NULL}, /* CRD0001 - Cardinal MVP288IV ? */ 475 {0x01308c0e, NULL}, /* CTL3001 - Creative Labs Phoneblaster */ 476 {0x36033610, NULL}, /* DAV0336 - DAVICOM 336PNP MODEM */ 477 {0x01009416, NULL}, /* ETT0001 - E-Tech Bullet 33k6 PnP */ 478 {0x0000aa1a, NULL}, /* FUJ0000 - FUJITSU Modem 33600 PNP/I2 */ 479 {0x1200c31e, NULL}, /* GVC0012 - VF1128HV-R9 (win modem?) */ 480 {0x0303c31e, NULL}, /* GVC0303 - MaxTech 33.6 PnP D/F/V */ 481 {0x0505c31e, NULL}, /* GVC0505 - GVC 56k Faxmodem */ 482 {0x0116c31e, NULL}, /* GVC1601 - Rockwell V.34 Plug & Play Modem */ 483 {0x0050c31e, NULL}, /* GVC5000 - some GVC modem */ 484 {0x3800f91e, NULL}, /* GWY0038 - Telepath with v.90 */ 485 {0x9062f91e, NULL}, /* GWY6290 - Telepath with x2 Technology */ 486 {0x8100e425, NULL}, /* IOD0081 - I-O DATA DEVICE,INC. IFML-560 */ 487 {0x21002534, NULL}, /* MAE0021 - Jetstream Int V.90 56k Voice Series 2*/ 488 {0x0000f435, NULL}, /* MOT0000 - Motorola ModemSURFR 33.6 Intern */ 489 {0x5015f435, NULL}, /* MOT1550 - Motorola ModemSURFR 56K Modem */ 490 {0xf015f435, NULL}, /* MOT15F0 - Motorola VoiceSURFR 56K Modem */ 491 {0x6045f435, NULL}, /* MOT4560 - Motorola ? */ 492 {0x61e7a338, NULL}, /* NECE761 - 33.6Modem */ 493 {0x08804f3f, NULL}, /* OZO8008 - Zoom (33.6k Modem) */ 494 {0x0f804f3f, NULL}, /* OZO800f - Zoom 2812 (56k Modem) */ 495 {0x39804f3f, NULL}, /* OZO8039 - Zoom 56k flex */ 496 {0x00914f3f, NULL}, /* OZO9100 - Zoom 2919 (K56 Faxmodem) */ 497 {0x3024a341, NULL}, /* PMC2430 - Pace 56 Voice Internal Modem */ 498 {0x1000eb49, NULL}, /* ROK0010 - Rockwell ? */ 499 {0x1200b23d, NULL}, /* RSS0012 - OMRON ME5614ISA */ 500 {0x5002734a, NULL}, /* RSS0250 - 5614Jx3(G) Internal Modem */ 501 {0x6202734a, NULL}, /* RSS0262 - 5614Jx3[G] V90+K56Flex Modem */ 502 {0x1010104d, NULL}, /* SHP1010 - Rockwell 33600bps Modem */ 503 {0xc100ad4d, NULL}, /* SMM00C1 - Leopard 56k PnP */ 504 {0x9012b04e, NULL}, /* SUP1290 - Supra ? */ 505 {0x1013b04e, NULL}, /* SUP1310 - SupraExpress 336i PnP */ 506 {0x8013b04e, NULL}, /* SUP1380 - SupraExpress 288i PnP Voice */ 507 {0x8113b04e, NULL}, /* SUP1381 - SupraExpress 336i PnP Voice */ 508 {0x5016b04e, NULL}, /* SUP1650 - Supra 336i Sp Intl */ 509 {0x7016b04e, NULL}, /* SUP1670 - Supra 336i V+ Intl */ 510 {0x7420b04e, NULL}, /* SUP2070 - Supra ? */ 511 {0x8020b04e, NULL}, /* SUP2080 - Supra ? */ 512 {0x8420b04e, NULL}, /* SUP2084 - SupraExpress 56i PnP */ 513 {0x7121b04e, NULL}, /* SUP2171 - SupraExpress 56i Sp? */ 514 {0x8024b04e, NULL}, /* SUP2480 - Supra ? */ 515 {0x01007256, NULL}, /* USR0001 - U.S. Robotics Inc., Sportster W */ 516 {0x02007256, NULL}, /* USR0002 - U.S. Robotics Inc. Sportster 33. */ 517 {0x04007256, NULL}, /* USR0004 - USR Sportster 14.4k */ 518 {0x06007256, NULL}, /* USR0006 - USR Sportster 33.6k */ 519 {0x11007256, NULL}, /* USR0011 - USR ? */ 520 {0x01017256, NULL}, /* USR0101 - USR ? */ 521 {0x30207256, NULL}, /* USR2030 - U.S.Robotics Inc. Sportster 560 */ 522 {0x50207256, NULL}, /* USR2050 - U.S.Robotics Inc. Sportster 33. */ 523 {0x70207256, NULL}, /* USR2070 - U.S.Robotics Inc. Sportster 560 */ 524 {0x30307256, NULL}, /* USR3030 - U.S. Robotics 56K FAX INT */ 525 {0x31307256, NULL}, /* USR3031 - U.S. Robotics 56K FAX INT */ 526 {0x50307256, NULL}, /* USR3050 - U.S. Robotics 56K FAX INT */ 527 {0x70307256, NULL}, /* USR3070 - U.S. Robotics 56K Voice INT */ 528 {0x90307256, NULL}, /* USR3090 - USR ? */ 529 {0x70917256, NULL}, /* USR9170 - U.S. Robotics 56K FAX INT */ 530 {0x90917256, NULL}, /* USR9190 - USR 56k Voice INT */ 531 {0x0300695c, NULL}, /* WCI0003 - Fax/Voice/Modem/Speakphone/Asvd */ 532 {0x01a0896a, NULL}, /* ZTIA001 - Zoom Internal V90 Faxmodem */ 533 {0x61f7896a, NULL}, /* ZTIF761 - Zoom ComStar 33.6 */ 534 {0} 535 }; 536 537 538 539 static int 540 sio_isa_probe(device_t dev) 541 { 542 /* Check isapnp ids */ 543 if (ISA_PNP_PROBE(device_get_parent(dev), dev, sio_ids) == ENXIO) 544 return (ENXIO); 545 return (sioprobe(dev, 0, 0UL)); 546 } 547 548 int 549 sioprobe(device_t dev, int xrid, u_long rclk) 550 { 551 #if 0 552 static bool_t already_init; 553 device_t xdev; 554 #endif 555 struct com_s *com; 556 u_int divisor; 557 bool_t failures[10]; 558 int fn; 559 device_t idev; 560 Port_t iobase; 561 intrmask_t irqmap[4]; 562 intrmask_t irqs; 563 u_char mcr_image; 564 int result; 565 u_long xirq; 566 u_int flags = device_get_flags(dev); 567 int rid; 568 struct resource *port; 569 570 rid = xrid; 571 port = bus_alloc_resource(dev, SYS_RES_IOPORT, &rid, 572 0, ~0, IO_COMSIZE, RF_ACTIVE); 573 if (!port) 574 return (ENXIO); 575 576 lwkt_gettoken(&tty_token); 577 com = device_get_softc(dev); 578 com->bst = rman_get_bustag(port); 579 com->bsh = rman_get_bushandle(port); 580 if (rclk == 0) 581 rclk = DEFAULT_RCLK; 582 com->rclk = rclk; 583 584 #if 0 585 /* 586 * XXX this is broken - when we are first called, there are no 587 * previously configured IO ports. We could hard code 588 * 0x3f8, 0x2f8, 0x3e8, 0x2e8 etc but that's probably worse. 589 * This code has been doing nothing since the conversion since 590 * "count" is zero the first time around. 591 */ 592 if (!already_init) { 593 /* 594 * Turn off MCR_IENABLE for all likely serial ports. An unused 595 * port with its MCR_IENABLE gate open will inhibit interrupts 596 * from any used port that shares the interrupt vector. 597 * XXX the gate enable is elsewhere for some multiports. 598 */ 599 device_t *devs; 600 int count, i, xioport; 601 602 devclass_get_devices(sio_devclass, &devs, &count); 603 for (i = 0; i < count; i++) { 604 xdev = devs[i]; 605 if (device_is_enabled(xdev) && 606 bus_get_resource(xdev, SYS_RES_IOPORT, 0, &xioport, 607 NULL) == 0) 608 outb(xioport + com_mcr, 0); 609 } 610 kfree(devs, M_TEMP); 611 already_init = TRUE; 612 } 613 #endif 614 615 if (COM_LLCONSOLE(flags)) { 616 kprintf("sio%d: reserved for low-level i/o\n", 617 device_get_unit(dev)); 618 bus_release_resource(dev, SYS_RES_IOPORT, rid, port); 619 lwkt_reltoken(&tty_token); 620 return (ENXIO); 621 } 622 623 /* 624 * If the device is on a multiport card and has an AST/4 625 * compatible interrupt control register, initialize this 626 * register and prepare to leave MCR_IENABLE clear in the mcr. 627 * Otherwise, prepare to set MCR_IENABLE in the mcr. 628 * Point idev to the device struct giving the correct id_irq. 629 * This is the struct for the master device if there is one. 630 */ 631 idev = dev; 632 mcr_image = MCR_IENABLE; 633 #ifdef COM_MULTIPORT 634 if (COM_ISMULTIPORT(flags)) { 635 Port_t xiobase; 636 u_long io; 637 638 idev = devclass_get_device(sio_devclass, COM_MPMASTER(flags)); 639 if (idev == NULL) { 640 kprintf("sio%d: master device %d not configured\n", 641 device_get_unit(dev), COM_MPMASTER(flags)); 642 idev = dev; 643 } 644 if (!COM_NOTAST4(flags)) { 645 if (bus_get_resource(idev, SYS_RES_IOPORT, 0, &io, 646 NULL) == 0) { 647 xiobase = io; 648 if (bus_get_resource(idev, SYS_RES_IRQ, 0, 649 NULL, NULL) == 0) 650 outb(xiobase + com_scr, 0x80); 651 else 652 outb(xiobase + com_scr, 0); 653 } 654 mcr_image = 0; 655 } 656 } 657 #endif /* COM_MULTIPORT */ 658 if (bus_get_resource(idev, SYS_RES_IRQ, 0, NULL, NULL) != 0) 659 mcr_image = 0; 660 661 bzero(failures, sizeof failures); 662 iobase = rman_get_start(port); 663 664 /* 665 * We don't want to get actual interrupts, just masked ones. 666 * Interrupts from this line should already be masked in the ICU, 667 * but mask them in the processor as well in case there are some 668 * (misconfigured) shared interrupts. 669 */ 670 com_lock(); 671 /* EXTRA DELAY? */ 672 673 /* 674 * For the TI16754 chips, set prescaler to 1 (4 is often the 675 * default after-reset value) as otherwise it's impossible to 676 * get highest baudrates. 677 */ 678 if (COM_TI16754(flags)) { 679 u_char cfcr, efr; 680 681 cfcr = sio_getreg(com, com_cfcr); 682 sio_setreg(com, com_cfcr, CFCR_EFR_ENABLE); 683 efr = sio_getreg(com, com_efr); 684 /* Unlock extended features to turn off prescaler. */ 685 sio_setreg(com, com_efr, efr | EFR_EFE); 686 /* Disable EFR. */ 687 sio_setreg(com, com_cfcr, (cfcr != CFCR_EFR_ENABLE) ? cfcr : 0); 688 /* Turn off prescaler. */ 689 sio_setreg(com, com_mcr, 690 sio_getreg(com, com_mcr) & ~MCR_PRESCALE); 691 sio_setreg(com, com_cfcr, CFCR_EFR_ENABLE); 692 sio_setreg(com, com_efr, efr); 693 sio_setreg(com, com_cfcr, cfcr); 694 } 695 696 /* 697 * Initialize the speed and the word size and wait long enough to 698 * drain the maximum of 16 bytes of junk in device output queues. 699 * The speed is undefined after a master reset and must be set 700 * before relying on anything related to output. There may be 701 * junk after a (very fast) soft reboot and (apparently) after 702 * master reset. 703 * XXX what about the UART bug avoided by waiting in comparam()? 704 * We don't want to to wait long enough to drain at 2 bps. 705 */ 706 if (iobase == siocniobase) { 707 DELAY((16 + 1) * 1000000 / (comdefaultrate / 10)); 708 } else { 709 sio_setreg(com, com_cfcr, CFCR_DLAB | CFCR_8BITS); 710 divisor = siodivisor(rclk, SIO_TEST_SPEED); 711 sio_setreg(com, com_dlbl, divisor & 0xff); 712 sio_setreg(com, com_dlbh, divisor >> 8); 713 sio_setreg(com, com_cfcr, CFCR_8BITS); 714 DELAY((16 + 1) * 1000000 / (SIO_TEST_SPEED / 10)); 715 } 716 717 /* 718 * Make sure we can drain the receiver. If we can't, the serial 719 * port may not exist. 720 */ 721 for (fn = 0; fn < 256; ++fn) { 722 if ((sio_getreg(com, com_lsr) & LSR_RXRDY) == 0) 723 break; 724 (void)sio_getreg(com, com_data); 725 } 726 if (fn == 256) { 727 com_unlock(); 728 lwkt_reltoken(&tty_token); 729 kprintf("sio%d: can't drain, serial port might " 730 "not exist, disabling\n", device_get_unit(dev)); 731 return (ENXIO); 732 } 733 734 /* 735 * Enable the interrupt gate and disable device interupts. This 736 * should leave the device driving the interrupt line low and 737 * guarantee an edge trigger if an interrupt can be generated. 738 */ 739 /* EXTRA DELAY? */ 740 sio_setreg(com, com_mcr, mcr_image); 741 sio_setreg(com, com_ier, 0); 742 DELAY(1000); /* XXX */ 743 irqmap[0] = isa_irq_pending(); 744 745 /* 746 * Attempt to set loopback mode so that we can send a null byte 747 * without annoying any external device. 748 */ 749 /* EXTRA DELAY? */ 750 sio_setreg(com, com_mcr, mcr_image | MCR_LOOPBACK); 751 752 /* 753 * Attempt to generate an output interrupt. On 8250's, setting 754 * IER_ETXRDY generates an interrupt independent of the current 755 * setting and independent of whether the THR is empty. On 16450's, 756 * setting IER_ETXRDY generates an interrupt independent of the 757 * current setting. On 16550A's, setting IER_ETXRDY only 758 * generates an interrupt when IER_ETXRDY is not already set. 759 */ 760 sio_setreg(com, com_ier, IER_ETXRDY); 761 762 /* 763 * On some 16x50 incompatibles, setting IER_ETXRDY doesn't generate 764 * an interrupt. They'd better generate one for actually doing 765 * output. Loopback may be broken on the same incompatibles but 766 * it's unlikely to do more than allow the null byte out. 767 */ 768 sio_setreg(com, com_data, 0); 769 DELAY((1 + 2) * 1000000 / (SIO_TEST_SPEED / 10)); 770 771 /* 772 * Turn off loopback mode so that the interrupt gate works again 773 * (MCR_IENABLE was hidden). This should leave the device driving 774 * an interrupt line high. It doesn't matter if the interrupt 775 * line oscillates while we are not looking at it, since interrupts 776 * are disabled. 777 */ 778 /* EXTRA DELAY? */ 779 sio_setreg(com, com_mcr, mcr_image); 780 781 /* 782 * Some pcmcia cards have the "TXRDY bug", so we check everyone 783 * for IIR_TXRDY implementation ( Palido 321s, DC-1S... ) 784 */ 785 if (COM_NOPROBE(flags)) { 786 /* Reading IIR register twice */ 787 for (fn = 0; fn < 2; fn ++) { 788 DELAY(10000); 789 failures[6] = sio_getreg(com, com_iir); 790 } 791 /* Check IIR_TXRDY clear ? */ 792 result = 0; 793 if (failures[6] & IIR_TXRDY) { 794 /* Nop, Double check with clearing IER */ 795 sio_setreg(com, com_ier, 0); 796 if (sio_getreg(com, com_iir) & IIR_NOPEND) { 797 /* Ok. we're familia this gang */ 798 SET_FLAG(dev, COM_C_IIR_TXRDYBUG); 799 } else { 800 /* Unknown, Just omit this chip.. XXX */ 801 result = ENXIO; 802 sio_setreg(com, com_mcr, 0); 803 } 804 } else { 805 /* OK. this is well-known guys */ 806 CLR_FLAG(dev, COM_C_IIR_TXRDYBUG); 807 } 808 sio_setreg(com, com_ier, 0); 809 sio_setreg(com, com_cfcr, CFCR_8BITS); 810 com_unlock(); 811 bus_release_resource(dev, SYS_RES_IOPORT, rid, port); 812 lwkt_reltoken(&tty_token); 813 return (iobase == siocniobase ? 0 : result); 814 } 815 816 /* 817 * Check that 818 * o the CFCR, IER and MCR in UART hold the values written to them 819 * (the values happen to be all distinct - this is good for 820 * avoiding false positive tests from bus echoes). 821 * o an output interrupt is generated and its vector is correct. 822 * o the interrupt goes away when the IIR in the UART is read. 823 */ 824 /* EXTRA DELAY? */ 825 failures[0] = sio_getreg(com, com_cfcr) - CFCR_8BITS; 826 failures[1] = sio_getreg(com, com_ier) - IER_ETXRDY; 827 failures[2] = sio_getreg(com, com_mcr) - mcr_image; 828 DELAY(10000); /* Some internal modems need this time */ 829 irqmap[1] = isa_irq_pending(); 830 failures[4] = (sio_getreg(com, com_iir) & IIR_IMASK) - IIR_TXRDY; 831 DELAY(1000); /* XXX */ 832 irqmap[2] = isa_irq_pending(); 833 failures[6] = (sio_getreg(com, com_iir) & IIR_IMASK) - IIR_NOPEND; 834 835 /* 836 * Turn off all device interrupts and check that they go off properly. 837 * Leave MCR_IENABLE alone. For ports without a master port, it gates 838 * the OUT2 output of the UART to 839 * the ICU input. Closing the gate would give a floating ICU input 840 * (unless there is another device driving it) and spurious interrupts. 841 * (On the system that this was first tested on, the input floats high 842 * and gives a (masked) interrupt as soon as the gate is closed.) 843 */ 844 sio_setreg(com, com_ier, 0); 845 sio_setreg(com, com_cfcr, CFCR_8BITS); /* dummy to avoid bus echo */ 846 failures[7] = sio_getreg(com, com_ier); 847 DELAY(1000); /* XXX */ 848 irqmap[3] = isa_irq_pending(); 849 failures[9] = (sio_getreg(com, com_iir) & IIR_IMASK) - IIR_NOPEND; 850 851 com_unlock(); 852 853 irqs = irqmap[1] & ~irqmap[0]; 854 if (bus_get_resource(idev, SYS_RES_IRQ, 0, &xirq, NULL) == 0 && 855 ((1 << xirq) & irqs) == 0) 856 kprintf( 857 "sio%d: configured irq %ld not in bitmap of probed irqs %#x\n", 858 device_get_unit(dev), xirq, irqs); 859 if (bootverbose) 860 kprintf("sio%d: irq maps: %#x %#x %#x %#x\n", 861 device_get_unit(dev), 862 irqmap[0], irqmap[1], irqmap[2], irqmap[3]); 863 864 result = 0; 865 for (fn = 0; fn < sizeof failures; ++fn) 866 if (failures[fn]) { 867 sio_setreg(com, com_mcr, 0); 868 result = ENXIO; 869 if (bootverbose) { 870 kprintf("sio%d: probe failed test(s):", 871 device_get_unit(dev)); 872 for (fn = 0; fn < sizeof failures; ++fn) 873 if (failures[fn]) 874 kprintf(" %d", fn); 875 kprintf("\n"); 876 } 877 break; 878 } 879 bus_release_resource(dev, SYS_RES_IOPORT, rid, port); 880 lwkt_reltoken(&tty_token); 881 return (iobase == siocniobase ? 0 : result); 882 } 883 884 #ifdef COM_ESP 885 static int 886 espattach(struct com_s *com, Port_t esp_port) 887 { 888 u_char dips; 889 u_char val; 890 891 /* 892 * Check the ESP-specific I/O port to see if we're an ESP 893 * card. If not, return failure immediately. 894 */ 895 if ((inb(esp_port) & 0xf3) == 0) { 896 kprintf(" port 0x%x is not an ESP board?\n", esp_port); 897 return (0); 898 } 899 900 lwkt_gettoken(&tty_token); 901 /* 902 * We've got something that claims to be a Hayes ESP card. 903 * Let's hope so. 904 */ 905 906 /* Get the dip-switch configuration */ 907 outb(esp_port + ESP_CMD1, ESP_GETDIPS); 908 dips = inb(esp_port + ESP_STATUS1); 909 910 /* 911 * Bits 0,1 of dips say which COM port we are. 912 */ 913 if (rman_get_start(com->ioportres) == likely_com_ports[dips & 0x03]) 914 kprintf(" : ESP"); 915 else { 916 kprintf(" esp_port has com %d\n", dips & 0x03); 917 lwkt_reltoken(&tty_token); 918 return (0); 919 } 920 921 /* 922 * Check for ESP version 2.0 or later: bits 4,5,6 = 010. 923 */ 924 outb(esp_port + ESP_CMD1, ESP_GETTEST); 925 val = inb(esp_port + ESP_STATUS1); /* clear reg 1 */ 926 val = inb(esp_port + ESP_STATUS2); 927 if ((val & 0x70) < 0x20) { 928 kprintf("-old (%o)", val & 0x70); 929 lwkt_reltoken(&tty_token); 930 return (0); 931 } 932 933 /* 934 * Check for ability to emulate 16550: bit 7 == 1 935 */ 936 if ((dips & 0x80) == 0) { 937 kprintf(" slave"); 938 lwkt_reltoken(&tty_token); 939 return (0); 940 } 941 942 /* 943 * Okay, we seem to be a Hayes ESP card. Whee. 944 */ 945 com->esp = TRUE; 946 com->esp_port = esp_port; 947 lwkt_reltoken(&tty_token); 948 return (1); 949 } 950 #endif /* COM_ESP */ 951 952 static int 953 sio_isa_attach(device_t dev) 954 { 955 return (sioattach(dev, 0, 0UL)); 956 } 957 958 int 959 sioattach(device_t dev, int xrid, u_long rclk) 960 { 961 struct com_s *com; 962 #ifdef COM_ESP 963 Port_t *espp; 964 #endif 965 Port_t iobase; 966 int minorbase; 967 int unit; 968 u_int flags; 969 int rid; 970 struct resource *port; 971 int ret; 972 static int did_init; 973 974 lwkt_gettoken(&tty_token); 975 if (did_init == 0) { 976 did_init = 1; 977 callout_init_mp(&sio_timeout_handle); 978 } 979 980 rid = xrid; 981 port = bus_alloc_resource(dev, SYS_RES_IOPORT, &rid, 982 0, ~0, IO_COMSIZE, RF_ACTIVE); 983 if (!port) { 984 lwkt_reltoken(&tty_token); 985 return (ENXIO); 986 } 987 988 iobase = rman_get_start(port); 989 unit = device_get_unit(dev); 990 com = device_get_softc(dev); 991 flags = device_get_flags(dev); 992 993 if (unit >= sio_numunits) 994 sio_numunits = unit + 1; 995 /* 996 * sioprobe() has initialized the device registers as follows: 997 * o cfcr = CFCR_8BITS. 998 * It is most important that CFCR_DLAB is off, so that the 999 * data port is not hidden when we enable interrupts. 1000 * o ier = 0. 1001 * Interrupts are only enabled when the line is open. 1002 * o mcr = MCR_IENABLE, or 0 if the port has AST/4 compatible 1003 * interrupt control register or the config specifies no irq. 1004 * Keeping MCR_DTR and MCR_RTS off might stop the external 1005 * device from sending before we are ready. 1006 */ 1007 bzero(com, sizeof *com); 1008 com->unit = unit; 1009 com->ioportres = port; 1010 com->bst = rman_get_bustag(port); 1011 com->bsh = rman_get_bushandle(port); 1012 com->cfcr_image = CFCR_8BITS; 1013 com->dtr_wait = 3 * hz; 1014 callout_init_mp(&com->dtr_ch); 1015 callout_init_mp(&com->busy_ch); 1016 com->loses_outints = COM_LOSESOUTINTS(flags) != 0; 1017 com->no_irq = bus_get_resource(dev, SYS_RES_IRQ, 0, NULL, NULL) != 0; 1018 com->tx_fifo_size = 1; 1019 com->obufs[0].l_head = com->obuf1; 1020 com->obufs[1].l_head = com->obuf2; 1021 1022 com->data_port = iobase + com_data; 1023 com->int_id_port = iobase + com_iir; 1024 com->modem_ctl_port = iobase + com_mcr; 1025 com->mcr_image = inb(com->modem_ctl_port); 1026 com->line_status_port = iobase + com_lsr; 1027 com->modem_status_port = iobase + com_msr; 1028 com->intr_ctl_port = iobase + com_ier; 1029 1030 if (rclk == 0) 1031 rclk = DEFAULT_RCLK; 1032 com->rclk = rclk; 1033 1034 /* 1035 * We don't use all the flags from <sys/ttydefaults.h> since they 1036 * are only relevant for logins. It's important to have echo off 1037 * initially so that the line doesn't start blathering before the 1038 * echo flag can be turned off. 1039 */ 1040 com->it_in.c_iflag = 0; 1041 com->it_in.c_oflag = 0; 1042 com->it_in.c_cflag = TTYDEF_CFLAG; 1043 com->it_in.c_lflag = 0; 1044 if (unit == comconsole) { 1045 com->it_in.c_iflag = TTYDEF_IFLAG; 1046 com->it_in.c_oflag = TTYDEF_OFLAG; 1047 com->it_in.c_cflag = TTYDEF_CFLAG | CLOCAL; 1048 com->it_in.c_lflag = TTYDEF_LFLAG; 1049 com->lt_out.c_cflag = com->lt_in.c_cflag = CLOCAL; 1050 com->lt_out.c_ispeed = com->lt_out.c_ospeed = 1051 com->lt_in.c_ispeed = com->lt_in.c_ospeed = 1052 com->it_in.c_ispeed = com->it_in.c_ospeed = comdefaultrate; 1053 } else 1054 com->it_in.c_ispeed = com->it_in.c_ospeed = TTYDEF_SPEED; 1055 if (siosetwater(com, com->it_in.c_ispeed) != 0) { 1056 /* 1057 * Leave i/o resources allocated if this is a `cn'-level 1058 * console, so that other devices can't snarf them. 1059 */ 1060 if (iobase != siocniobase) 1061 bus_release_resource(dev, SYS_RES_IOPORT, rid, port); 1062 lwkt_reltoken(&tty_token); 1063 return (ENOMEM); 1064 } 1065 termioschars(&com->it_in); 1066 com->it_out = com->it_in; 1067 1068 /* attempt to determine UART type */ 1069 kprintf("sio%d: type", unit); 1070 1071 1072 #ifdef COM_MULTIPORT 1073 if (!COM_ISMULTIPORT(flags) && !COM_IIR_TXRDYBUG(flags)) 1074 #else 1075 if (!COM_IIR_TXRDYBUG(flags)) 1076 #endif 1077 { 1078 u_char scr; 1079 u_char scr1; 1080 u_char scr2; 1081 1082 scr = sio_getreg(com, com_scr); 1083 sio_setreg(com, com_scr, 0xa5); 1084 scr1 = sio_getreg(com, com_scr); 1085 sio_setreg(com, com_scr, 0x5a); 1086 scr2 = sio_getreg(com, com_scr); 1087 sio_setreg(com, com_scr, scr); 1088 if (scr1 != 0xa5 || scr2 != 0x5a) { 1089 kprintf(" 8250"); 1090 goto determined_type; 1091 } 1092 } 1093 sio_setreg(com, com_fifo, FIFO_ENABLE | FIFO_RX_HIGH); 1094 DELAY(100); 1095 com->st16650a = 0; 1096 switch (inb(com->int_id_port) & IIR_FIFO_MASK) { 1097 case FIFO_RX_LOW: 1098 kprintf(" 16450"); 1099 break; 1100 case FIFO_RX_MEDL: 1101 kprintf(" 16450?"); 1102 break; 1103 case FIFO_RX_MEDH: 1104 kprintf(" 16550?"); 1105 break; 1106 case FIFO_RX_HIGH: 1107 if (COM_NOFIFO(flags)) { 1108 kprintf(" 16550A fifo disabled"); 1109 } else { 1110 com->hasfifo = TRUE; 1111 if (COM_ST16650A(flags)) { 1112 com->st16650a = 1; 1113 com->tx_fifo_size = 32; 1114 kprintf(" ST16650A"); 1115 } else if (COM_TI16754(flags)) { 1116 com->tx_fifo_size = 64; 1117 kprintf(" TI16754"); 1118 } else { 1119 com->tx_fifo_size = COM_FIFOSIZE(flags); 1120 kprintf(" 16550A"); 1121 } 1122 } 1123 #ifdef COM_ESP 1124 for (espp = likely_esp_ports; *espp != 0; espp++) 1125 if (espattach(com, *espp)) { 1126 com->tx_fifo_size = 1024; 1127 break; 1128 } 1129 #endif 1130 if (!com->st16650a && !COM_TI16754(flags)) { 1131 if (!com->tx_fifo_size) 1132 com->tx_fifo_size = 16; 1133 else 1134 kprintf(" lookalike with %d bytes FIFO", 1135 com->tx_fifo_size); 1136 } 1137 1138 break; 1139 } 1140 1141 #ifdef COM_ESP 1142 if (com->esp) { 1143 /* 1144 * Set 16550 compatibility mode. 1145 * We don't use the ESP_MODE_SCALE bit to increase the 1146 * fifo trigger levels because we can't handle large 1147 * bursts of input. 1148 * XXX flow control should be set in comparam(), not here. 1149 */ 1150 outb(com->esp_port + ESP_CMD1, ESP_SETMODE); 1151 outb(com->esp_port + ESP_CMD2, ESP_MODE_RTS | ESP_MODE_FIFO); 1152 1153 /* Set RTS/CTS flow control. */ 1154 outb(com->esp_port + ESP_CMD1, ESP_SETFLOWTYPE); 1155 outb(com->esp_port + ESP_CMD2, ESP_FLOW_RTS); 1156 outb(com->esp_port + ESP_CMD2, ESP_FLOW_CTS); 1157 1158 /* Set flow-control levels. */ 1159 outb(com->esp_port + ESP_CMD1, ESP_SETRXFLOW); 1160 outb(com->esp_port + ESP_CMD2, HIBYTE(768)); 1161 outb(com->esp_port + ESP_CMD2, LOBYTE(768)); 1162 outb(com->esp_port + ESP_CMD2, HIBYTE(512)); 1163 outb(com->esp_port + ESP_CMD2, LOBYTE(512)); 1164 } 1165 #endif /* COM_ESP */ 1166 sio_setreg(com, com_fifo, 0); 1167 determined_type: ; 1168 1169 #ifdef COM_MULTIPORT 1170 if (COM_ISMULTIPORT(flags)) { 1171 device_t masterdev; 1172 1173 com->multiport = TRUE; 1174 kprintf(" (multiport"); 1175 if (unit == COM_MPMASTER(flags)) 1176 kprintf(" master"); 1177 kprintf(")"); 1178 masterdev = devclass_get_device(sio_devclass, 1179 COM_MPMASTER(flags)); 1180 com->no_irq = (masterdev == NULL || bus_get_resource(masterdev, 1181 SYS_RES_IRQ, 0, NULL, NULL) != 0); 1182 } 1183 #endif /* COM_MULTIPORT */ 1184 if (unit == comconsole) 1185 kprintf(", console"); 1186 if (COM_IIR_TXRDYBUG(flags)) 1187 kprintf(" with a bogus IIR_TXRDY register"); 1188 kprintf("\n"); 1189 1190 if (!sio_registered) { 1191 register_swi(SWI_TTY, siopoll, NULL ,"swi_siopoll", NULL, -1); 1192 sio_registered = TRUE; 1193 } 1194 minorbase = UNIT_TO_MINOR(unit); 1195 make_dev(&sio_ops, minorbase, 1196 UID_ROOT, GID_WHEEL, 0600, "ttyd%r", unit); 1197 make_dev(&sio_ops, minorbase | CONTROL_INIT_STATE, 1198 UID_ROOT, GID_WHEEL, 0600, "ttyid%r", unit); 1199 make_dev(&sio_ops, minorbase | CONTROL_LOCK_STATE, 1200 UID_ROOT, GID_WHEEL, 0600, "ttyld%r", unit); 1201 make_dev(&sio_ops, minorbase | CALLOUT_MASK, 1202 UID_UUCP, GID_DIALER, 0660, "cuaa%r", unit); 1203 make_dev(&sio_ops, minorbase | CALLOUT_MASK | CONTROL_INIT_STATE, 1204 UID_UUCP, GID_DIALER, 0660, "cuaia%r", unit); 1205 make_dev(&sio_ops, minorbase | CALLOUT_MASK | CONTROL_LOCK_STATE, 1206 UID_UUCP, GID_DIALER, 0660, "cuala%r", unit); 1207 com->flags = flags; 1208 com->pps.ppscap = PPS_CAPTUREASSERT | PPS_CAPTURECLEAR; 1209 pps_init(&com->pps); 1210 1211 rid = 0; 1212 com->irqres = bus_alloc_resource(dev, SYS_RES_IRQ, &rid, 0ul, ~0ul, 1, 1213 RF_ACTIVE); 1214 if (com->irqres) { 1215 ret = BUS_SETUP_INTR(device_get_parent(dev), dev, 1216 com->irqres, INTR_MPSAFE, siointr, com, 1217 &com->cookie, NULL, NULL); 1218 if (ret) 1219 device_printf(dev, "could not activate interrupt\n"); 1220 #if defined(DDB) 1221 /* 1222 * Enable interrupts for early break-to-debugger support 1223 * on the console. 1224 */ 1225 if (ret == 0 && unit == comconsole && 1226 (break_to_debugger || alt_break_to_debugger)) { 1227 inb(siocniobase + com_data); 1228 outb(siocniobase + com_ier, 1229 IER_ERXRDY | IER_ERLS | IER_EMSC); 1230 } 1231 #endif 1232 } 1233 1234 lwkt_reltoken(&tty_token); 1235 return (0); 1236 } 1237 1238 static int 1239 sioopen(struct dev_open_args *ap) 1240 { 1241 cdev_t dev = ap->a_head.a_dev; 1242 struct com_s *com; 1243 int error; 1244 int mynor; 1245 struct tty *tp; 1246 int unit; 1247 1248 mynor = minor(dev); 1249 unit = MINOR_TO_UNIT(mynor); 1250 com = com_addr(unit); 1251 if (com == NULL) 1252 return (ENXIO); 1253 if (com->gone) 1254 return (ENXIO); 1255 if (mynor & CONTROL_MASK) 1256 return (0); 1257 lwkt_gettoken(&tty_token); 1258 tp = dev->si_tty = com->tp = ttymalloc(com->tp); 1259 crit_enter(); 1260 /* 1261 * We jump to this label after all non-interrupted sleeps to pick 1262 * up any changes of the device state. 1263 */ 1264 open_top: 1265 while (com->state & CS_DTR_OFF) { 1266 error = tsleep(&com->dtr_wait, PCATCH, "siodtr", 0); 1267 if (com_addr(unit) == NULL) { 1268 crit_exit(); 1269 lwkt_reltoken(&tty_token); 1270 return (ENXIO); 1271 } 1272 if (error != 0 || com->gone) 1273 goto out; 1274 } 1275 if (tp->t_state & TS_ISOPEN) { 1276 /* 1277 * The device is open, so everything has been initialized. 1278 * Handle conflicts. 1279 */ 1280 if (mynor & CALLOUT_MASK) { 1281 if (!com->active_out) { 1282 error = EBUSY; 1283 goto out; 1284 } 1285 } else { 1286 if (com->active_out) { 1287 if (ap->a_oflags & O_NONBLOCK) { 1288 error = EBUSY; 1289 goto out; 1290 } 1291 error = tsleep(&com->active_out, 1292 PCATCH, "siobi", 0); 1293 if (com_addr(unit) == NULL) { 1294 crit_exit(); 1295 lwkt_reltoken(&tty_token); 1296 return (ENXIO); 1297 } 1298 if (error != 0 || com->gone) 1299 goto out; 1300 goto open_top; 1301 } 1302 } 1303 if (tp->t_state & TS_XCLUDE && priv_check_cred(ap->a_cred, PRIV_ROOT, 0)) { 1304 error = EBUSY; 1305 goto out; 1306 } 1307 } else { 1308 /* 1309 * The device isn't open, so there are no conflicts. 1310 * Initialize it. Initialization is done twice in many 1311 * cases: to preempt sleeping callin opens if we are 1312 * callout, and to complete a callin open after DCD rises. 1313 */ 1314 tp->t_oproc = comstart; 1315 tp->t_param = comparam; 1316 tp->t_stop = comstop; 1317 tp->t_dev = dev; 1318 tp->t_termios = mynor & CALLOUT_MASK 1319 ? com->it_out : com->it_in; 1320 (void)commctl(com, TIOCM_DTR | TIOCM_RTS, DMSET); 1321 com->poll = com->no_irq; 1322 com->poll_output = com->loses_outints; 1323 ++com->wopeners; 1324 error = comparam(tp, &tp->t_termios); 1325 --com->wopeners; 1326 if (error != 0) 1327 goto out; 1328 /* 1329 * XXX we should goto open_top if comparam() slept. 1330 */ 1331 if (com->hasfifo) { 1332 /* 1333 * (Re)enable and drain fifos. 1334 * 1335 * Certain SMC chips cause problems if the fifos 1336 * are enabled while input is ready. Turn off the 1337 * fifo if necessary to clear the input. We test 1338 * the input ready bit after enabling the fifos 1339 * since we've already enabled them in comparam() 1340 * and to handle races between enabling and fresh 1341 * input. 1342 */ 1343 while (TRUE) { 1344 sio_setreg(com, com_fifo, 1345 FIFO_RCV_RST | FIFO_XMT_RST 1346 | com->fifo_image); 1347 /* 1348 * XXX the delays are for superstitious 1349 * historical reasons. It must be less than 1350 * the character time at the maximum 1351 * supported speed (87 usec at 115200 bps 1352 * 8N1). Otherwise we might loop endlessly 1353 * if data is streaming in. We used to use 1354 * delays of 100. That usually worked 1355 * because DELAY(100) used to usually delay 1356 * for about 85 usec instead of 100. 1357 */ 1358 DELAY(50); 1359 if (!(inb(com->line_status_port) & LSR_RXRDY)) 1360 break; 1361 sio_setreg(com, com_fifo, 0); 1362 DELAY(50); 1363 (void) inb(com->data_port); 1364 } 1365 } 1366 1367 com_lock(); 1368 (void) inb(com->line_status_port); 1369 (void) inb(com->data_port); 1370 com->prev_modem_status = com->last_modem_status 1371 = inb(com->modem_status_port); 1372 if (COM_IIR_TXRDYBUG(com->flags)) { 1373 outb(com->intr_ctl_port, IER_ERXRDY | IER_ERLS 1374 | IER_EMSC); 1375 } else { 1376 outb(com->intr_ctl_port, IER_ERXRDY | IER_ETXRDY 1377 | IER_ERLS | IER_EMSC); 1378 } 1379 com_unlock(); 1380 /* 1381 * Handle initial DCD. Callout devices get a fake initial 1382 * DCD (trapdoor DCD). If we are callout, then any sleeping 1383 * callin opens get woken up and resume sleeping on "siobi" 1384 * instead of "siodcd". 1385 */ 1386 /* 1387 * XXX `mynor & CALLOUT_MASK' should be 1388 * `tp->t_cflag & (SOFT_CARRIER | TRAPDOOR_CARRIER) where 1389 * TRAPDOOR_CARRIER is the default initial state for callout 1390 * devices and SOFT_CARRIER is like CLOCAL except it hides 1391 * the true carrier. 1392 */ 1393 if (com->prev_modem_status & MSR_DCD || mynor & CALLOUT_MASK) 1394 (*linesw[tp->t_line].l_modem)(tp, 1); 1395 } 1396 /* 1397 * Wait for DCD if necessary. 1398 */ 1399 if (!(tp->t_state & TS_CARR_ON) && !(mynor & CALLOUT_MASK) 1400 && !(tp->t_cflag & CLOCAL) && !(ap->a_oflags & O_NONBLOCK)) { 1401 ++com->wopeners; 1402 error = tsleep(TSA_CARR_ON(tp), PCATCH, "siodcd", 0); 1403 if (com_addr(unit) == NULL) { 1404 crit_exit(); 1405 lwkt_reltoken(&tty_token); 1406 return (ENXIO); 1407 } 1408 --com->wopeners; 1409 if (error != 0 || com->gone) 1410 goto out; 1411 goto open_top; 1412 } 1413 error = (*linesw[tp->t_line].l_open)(dev, tp); 1414 disc_optim(tp, &tp->t_termios, com); 1415 if (tp->t_state & TS_ISOPEN && mynor & CALLOUT_MASK) 1416 com->active_out = TRUE; 1417 siosettimeout(); 1418 out: 1419 crit_exit(); 1420 if (!(tp->t_state & TS_ISOPEN) && com->wopeners == 0) 1421 comhardclose(com); 1422 lwkt_reltoken(&tty_token); 1423 return (error); 1424 } 1425 1426 static int 1427 sioclose(struct dev_close_args *ap) 1428 { 1429 cdev_t dev = ap->a_head.a_dev; 1430 struct com_s *com; 1431 int mynor; 1432 struct tty *tp; 1433 1434 mynor = minor(dev); 1435 if (mynor & CONTROL_MASK) 1436 return (0); 1437 lwkt_gettoken(&tty_token); 1438 com = com_addr(MINOR_TO_UNIT(mynor)); 1439 if (com == NULL) { 1440 lwkt_reltoken(&tty_token); 1441 return (ENODEV); 1442 } 1443 tp = com->tp; 1444 crit_enter(); 1445 (*linesw[tp->t_line].l_close)(tp, ap->a_fflag); 1446 disc_optim(tp, &tp->t_termios, com); 1447 comstop(tp, FREAD | FWRITE); 1448 comhardclose(com); 1449 ttyclose(tp); 1450 siosettimeout(); 1451 crit_exit(); 1452 if (com->gone) { 1453 kprintf("sio%d: gone\n", com->unit); 1454 crit_enter(); 1455 if (com->ibuf != NULL) 1456 kfree(com->ibuf, M_DEVBUF); 1457 bzero(tp, sizeof *tp); 1458 crit_exit(); 1459 } 1460 lwkt_reltoken(&tty_token); 1461 return (0); 1462 } 1463 1464 static void 1465 comhardclose(struct com_s *com) 1466 { 1467 struct tty *tp; 1468 crit_enter(); 1469 lwkt_gettoken(&tty_token); 1470 com->poll = FALSE; 1471 com->poll_output = FALSE; 1472 com->do_timestamp = FALSE; 1473 com->do_dcd_timestamp = FALSE; 1474 com->pps.ppsparam.mode = 0; 1475 sio_setreg(com, com_cfcr, com->cfcr_image &= ~CFCR_SBREAK); 1476 tp = com->tp; 1477 1478 #if defined(DDB) 1479 /* 1480 * Leave interrupts enabled and don't clear DTR if this is the 1481 * console. This allows us to detect break-to-debugger events 1482 * while the console device is closed. 1483 */ 1484 if (com->unit != comconsole || 1485 (break_to_debugger == 0 && alt_break_to_debugger == 0)) 1486 #endif 1487 { 1488 sio_setreg(com, com_ier, 0); 1489 if (tp->t_cflag & HUPCL 1490 /* 1491 * XXX we will miss any carrier drop between here and the 1492 * next open. Perhaps we should watch DCD even when the 1493 * port is closed; it is not sufficient to check it at 1494 * the next open because it might go up and down while 1495 * we're not watching. 1496 */ 1497 || (!com->active_out 1498 && !(com->prev_modem_status & MSR_DCD) 1499 && !(com->it_in.c_cflag & CLOCAL)) 1500 || !(tp->t_state & TS_ISOPEN)) { 1501 (void)commctl(com, TIOCM_DTR, DMBIC); 1502 if (com->dtr_wait != 0 && !(com->state & CS_DTR_OFF)) { 1503 callout_reset(&com->dtr_ch, com->dtr_wait, 1504 siodtrwakeup, com); 1505 com->state |= CS_DTR_OFF; 1506 } 1507 } 1508 } 1509 if (com->hasfifo) { 1510 /* 1511 * Disable fifos so that they are off after controlled 1512 * reboots. Some BIOSes fail to detect 16550s when the 1513 * fifos are enabled. 1514 */ 1515 sio_setreg(com, com_fifo, 0); 1516 } 1517 com->active_out = FALSE; 1518 wakeup(&com->active_out); 1519 wakeup(TSA_CARR_ON(tp)); /* restart any wopeners */ 1520 lwkt_reltoken(&tty_token); 1521 crit_exit(); 1522 } 1523 1524 static int 1525 sioread(struct dev_read_args *ap) 1526 { 1527 cdev_t dev = ap->a_head.a_dev; 1528 int mynor, ret; 1529 struct com_s *com; 1530 1531 lwkt_gettoken(&tty_token); 1532 mynor = minor(dev); 1533 if (mynor & CONTROL_MASK) { 1534 lwkt_reltoken(&tty_token); 1535 return (ENODEV); 1536 } 1537 com = com_addr(MINOR_TO_UNIT(mynor)); 1538 if (com == NULL || com->gone) { 1539 lwkt_reltoken(&tty_token); 1540 return (ENODEV); 1541 } 1542 ret = ((*linesw[com->tp->t_line].l_read)(com->tp, ap->a_uio, ap->a_ioflag)); 1543 lwkt_reltoken(&tty_token); 1544 return ret; 1545 } 1546 1547 static int 1548 siowrite(struct dev_write_args *ap) 1549 { 1550 cdev_t dev = ap->a_head.a_dev; 1551 int mynor; 1552 struct com_s *com; 1553 int unit, ret; 1554 1555 lwkt_gettoken(&tty_token); 1556 mynor = minor(dev); 1557 if (mynor & CONTROL_MASK) { 1558 lwkt_reltoken(&tty_token); 1559 return (ENODEV); 1560 } 1561 1562 unit = MINOR_TO_UNIT(mynor); 1563 com = com_addr(unit); 1564 if (com == NULL || com->gone) { 1565 lwkt_reltoken(&tty_token); 1566 return (ENODEV); 1567 } 1568 /* 1569 * (XXX) We disallow virtual consoles if the physical console is 1570 * a serial port. This is in case there is a display attached that 1571 * is not the console. In that situation we don't need/want the X 1572 * server taking over the console. 1573 */ 1574 if (constty != NULL && unit == comconsole) 1575 constty = NULL; 1576 ret = ((*linesw[com->tp->t_line].l_write)(com->tp, ap->a_uio, ap->a_ioflag)); 1577 lwkt_reltoken(&tty_token); 1578 return ret; 1579 } 1580 1581 static void 1582 siobusycheck(void *chan) 1583 { 1584 struct com_s *com; 1585 1586 lwkt_gettoken(&tty_token); 1587 com = (struct com_s *)chan; 1588 1589 /* 1590 * Clear TS_BUSY if low-level output is complete. 1591 * spl locking is sufficient because siointr1() does not set CS_BUSY. 1592 * If siointr1() clears CS_BUSY after we look at it, then we'll get 1593 * called again. Reading the line status port outside of siointr1() 1594 * is safe because CS_BUSY is clear so there are no output interrupts 1595 * to lose. 1596 */ 1597 crit_enter(); 1598 if (com->state & CS_BUSY) 1599 com->extra_state &= ~CSE_BUSYCHECK; /* False alarm. */ 1600 else if ((inb(com->line_status_port) & (LSR_TSRE | LSR_TXRDY)) 1601 == (LSR_TSRE | LSR_TXRDY)) { 1602 com->tp->t_state &= ~TS_BUSY; 1603 ttwwakeup(com->tp); 1604 com->extra_state &= ~CSE_BUSYCHECK; 1605 } else { 1606 callout_reset(&com->busy_ch, hz / 100, siobusycheck, com); 1607 } 1608 crit_exit(); 1609 lwkt_reltoken(&tty_token); 1610 } 1611 1612 static u_int 1613 siodivisor(u_long rclk, speed_t speed) 1614 { 1615 long actual_speed; 1616 u_int divisor; 1617 int error; 1618 1619 if (speed == 0 || speed > ((speed_t)-1 - 1) / 8) 1620 return (0); 1621 divisor = (rclk / (8UL * speed) + 1) / 2; 1622 if (divisor == 0 || divisor >= 65536) 1623 return (0); 1624 actual_speed = rclk / (16UL * divisor); 1625 1626 /* 10 times error in percent: */ 1627 error = ((actual_speed - (long)speed) * 2000 / (long)speed + 1) / 2; 1628 1629 /* 3.0% maximum error tolerance: */ 1630 if (error < -30 || error > 30) 1631 return (0); 1632 1633 return (divisor); 1634 } 1635 1636 static void 1637 siodtrwakeup(void *chan) 1638 { 1639 struct com_s *com; 1640 1641 lwkt_gettoken(&tty_token); 1642 com = (struct com_s *)chan; 1643 com->state &= ~CS_DTR_OFF; 1644 wakeup(&com->dtr_wait); 1645 lwkt_reltoken(&tty_token); 1646 } 1647 1648 /* 1649 * NOTE: Normally called with tty_token held but might not be when 1650 * operating as the console. 1651 * 1652 * Must be called with com_lock 1653 */ 1654 static void 1655 sioinput(struct com_s *com) 1656 { 1657 u_char *buf; 1658 int incc; 1659 u_char line_status; 1660 int recv_data; 1661 struct tty *tp; 1662 1663 buf = com->ibuf; 1664 tp = com->tp; 1665 if (!(tp->t_state & TS_ISOPEN) || !(tp->t_cflag & CREAD)) { 1666 com_events -= (com->iptr - com->ibuf); 1667 com->iptr = com->ibuf; 1668 return; 1669 } 1670 if (tp->t_state & TS_CAN_BYPASS_L_RINT) { 1671 /* 1672 * Avoid the grotesquely inefficient lineswitch routine 1673 * (ttyinput) in "raw" mode. It usually takes about 450 1674 * instructions (that's without canonical processing or echo!). 1675 * slinput is reasonably fast (usually 40 instructions plus 1676 * call overhead). 1677 */ 1678 do { 1679 com_unlock(); 1680 incc = com->iptr - buf; 1681 if (tp->t_rawq.c_cc + incc > tp->t_ihiwat 1682 && (com->state & CS_RTS_IFLOW 1683 || tp->t_iflag & IXOFF) 1684 && !(tp->t_state & TS_TBLOCK)) 1685 ttyblock(tp); 1686 com->delta_error_counts[CE_TTY_BUF_OVERFLOW] 1687 += b_to_q((char *)buf, incc, &tp->t_rawq); 1688 buf += incc; 1689 tk_nin += incc; 1690 tk_rawcc += incc; 1691 tp->t_rawcc += incc; 1692 ttwakeup(tp); 1693 if (tp->t_state & TS_TTSTOP 1694 && (tp->t_iflag & IXANY 1695 || tp->t_cc[VSTART] == tp->t_cc[VSTOP])) { 1696 tp->t_state &= ~TS_TTSTOP; 1697 tp->t_lflag &= ~FLUSHO; 1698 comstart(tp); 1699 } 1700 com_lock(); 1701 } while (buf < com->iptr); 1702 } else { 1703 do { 1704 com_unlock(); 1705 line_status = buf[com->ierroff]; 1706 recv_data = *buf++; 1707 if (line_status 1708 & (LSR_BI | LSR_FE | LSR_OE | LSR_PE)) { 1709 if (line_status & LSR_BI) 1710 recv_data |= TTY_BI; 1711 if (line_status & LSR_FE) 1712 recv_data |= TTY_FE; 1713 if (line_status & LSR_OE) 1714 recv_data |= TTY_OE; 1715 if (line_status & LSR_PE) 1716 recv_data |= TTY_PE; 1717 } 1718 (*linesw[tp->t_line].l_rint)(recv_data, tp); 1719 com_lock(); 1720 } while (buf < com->iptr); 1721 } 1722 com_events -= (com->iptr - com->ibuf); 1723 com->iptr = com->ibuf; 1724 1725 /* 1726 * There is now room for another low-level buffer full of input, 1727 * so enable RTS if it is now disabled and there is room in the 1728 * high-level buffer. 1729 */ 1730 if ((com->state & CS_RTS_IFLOW) && !(com->mcr_image & MCR_RTS) && 1731 !(tp->t_state & TS_TBLOCK)) 1732 outb(com->modem_ctl_port, com->mcr_image |= MCR_RTS); 1733 } 1734 1735 void 1736 siointr(void *arg) 1737 { 1738 lwkt_gettoken(&tty_token); 1739 #ifndef COM_MULTIPORT 1740 com_lock(); 1741 siointr1((struct com_s *) arg); 1742 com_unlock(); 1743 #else /* COM_MULTIPORT */ 1744 bool_t possibly_more_intrs; 1745 int unit; 1746 struct com_s *com; 1747 1748 /* 1749 * Loop until there is no activity on any port. This is necessary 1750 * to get an interrupt edge more than to avoid another interrupt. 1751 * If the IRQ signal is just an OR of the IRQ signals from several 1752 * devices, then the edge from one may be lost because another is 1753 * on. 1754 */ 1755 com_lock(); 1756 do { 1757 possibly_more_intrs = FALSE; 1758 for (unit = 0; unit < sio_numunits; ++unit) { 1759 com = com_addr(unit); 1760 /* 1761 * XXX com_lock(); 1762 * would it work here, or be counter-productive? 1763 */ 1764 if (com != NULL 1765 && !com->gone 1766 && (inb(com->int_id_port) & IIR_IMASK) 1767 != IIR_NOPEND) { 1768 siointr1(com); 1769 possibly_more_intrs = TRUE; 1770 } 1771 /* XXX com_unlock(); */ 1772 } 1773 } while (possibly_more_intrs); 1774 com_unlock(); 1775 #endif /* COM_MULTIPORT */ 1776 lwkt_reltoken(&tty_token); 1777 } 1778 1779 /* 1780 * Called with tty_token held and com_lock held. 1781 */ 1782 static void 1783 siointr1(struct com_s *com) 1784 { 1785 u_char line_status; 1786 u_char modem_status; 1787 u_char *ioptr; 1788 u_char recv_data; 1789 u_char int_ctl; 1790 u_char int_ctl_new; 1791 sysclock_t count; 1792 1793 int_ctl = inb(com->intr_ctl_port); 1794 int_ctl_new = int_ctl; 1795 1796 while (!com->gone) { 1797 if (com->pps.ppsparam.mode & PPS_CAPTUREBOTH) { 1798 modem_status = inb(com->modem_status_port); 1799 if ((modem_status ^ com->last_modem_status) & MSR_DCD) { 1800 count = sys_cputimer->count(); 1801 pps_event(&com->pps, count, 1802 (modem_status & MSR_DCD) ? 1803 PPS_CAPTUREASSERT : PPS_CAPTURECLEAR); 1804 } 1805 } 1806 line_status = inb(com->line_status_port); 1807 1808 /* input event? (check first to help avoid overruns) */ 1809 while (line_status & LSR_RCV_MASK) { 1810 /* break/unnattached error bits or real input? */ 1811 if (!(line_status & LSR_RXRDY)) 1812 recv_data = 0; 1813 else 1814 recv_data = inb(com->data_port); 1815 #if defined(DDB) 1816 /* 1817 * Solaris implements a new BREAK which is initiated 1818 * by a character sequence CR ~ ^b which is similar 1819 * to a familiar pattern used on Sun servers by the 1820 * Remote Console. 1821 */ 1822 #define KEY_CRTLB 2 /* ^B */ 1823 #define KEY_CR 13 /* CR '\r' */ 1824 #define KEY_TILDE 126 /* ~ */ 1825 1826 if (com->unit == comconsole && alt_break_to_debugger) { 1827 static int brk_state1 = 0, brk_state2 = 0; 1828 if (recv_data == KEY_CR) { 1829 brk_state1 = recv_data; 1830 brk_state2 = 0; 1831 } else if (brk_state1 == KEY_CR && (recv_data == KEY_TILDE || recv_data == KEY_CRTLB)) { 1832 if (recv_data == KEY_TILDE) 1833 brk_state2 = recv_data; 1834 else if (brk_state2 == KEY_TILDE && recv_data == KEY_CRTLB) { 1835 com_unlock(); 1836 breakpoint(); 1837 com_lock(); 1838 brk_state1 = brk_state2 = 0; 1839 goto cont; 1840 } else 1841 brk_state2 = 0; 1842 } else 1843 brk_state1 = 0; 1844 } 1845 #endif 1846 if (line_status & (LSR_BI | LSR_FE | LSR_PE)) { 1847 /* 1848 * Don't store BI if IGNBRK or FE/PE if IGNPAR. 1849 * Otherwise, push the work to a higher level 1850 * (to handle PARMRK) if we're bypassing. 1851 * Otherwise, convert BI/FE and PE+INPCK to 0. 1852 * 1853 * This makes bypassing work right in the 1854 * usual "raw" case (IGNBRK set, and IGNPAR 1855 * and INPCK clear). 1856 * 1857 * Note: BI together with FE/PE means just BI. 1858 */ 1859 if (line_status & LSR_BI) { 1860 #if defined(DDB) 1861 if (com->unit == comconsole && 1862 break_to_debugger) { 1863 com_unlock(); 1864 breakpoint(); 1865 com_lock(); 1866 goto cont; 1867 } 1868 #endif 1869 if (com->tp == NULL 1870 || com->tp->t_iflag & IGNBRK) 1871 goto cont; 1872 } else { 1873 if (com->tp == NULL 1874 || com->tp->t_iflag & IGNPAR) 1875 goto cont; 1876 } 1877 if (com->tp->t_state & TS_CAN_BYPASS_L_RINT 1878 && (line_status & (LSR_BI | LSR_FE) 1879 || com->tp->t_iflag & INPCK)) 1880 recv_data = 0; 1881 } 1882 ++com->bytes_in; 1883 if (com->hotchar != 0 && recv_data == com->hotchar) 1884 setsofttty(); 1885 ioptr = com->iptr; 1886 if (ioptr >= com->ibufend) 1887 CE_RECORD(com, CE_INTERRUPT_BUF_OVERFLOW); 1888 else { 1889 if (com->do_timestamp) 1890 microtime(&com->timestamp); 1891 ++com_events; 1892 schedsofttty(); 1893 #if 0 /* for testing input latency vs efficiency */ 1894 if (com->iptr - com->ibuf == 8) 1895 setsofttty(); 1896 #endif 1897 ioptr[0] = recv_data; 1898 ioptr[com->ierroff] = line_status; 1899 com->iptr = ++ioptr; 1900 if (ioptr == com->ihighwater 1901 && com->state & CS_RTS_IFLOW) 1902 outb(com->modem_ctl_port, 1903 com->mcr_image &= ~MCR_RTS); 1904 if (line_status & LSR_OE) 1905 CE_RECORD(com, CE_OVERRUN); 1906 } 1907 cont: 1908 /* 1909 * "& 0x7F" is to avoid the gcc-1.40 generating a slow 1910 * jump from the top of the loop to here 1911 */ 1912 line_status = inb(com->line_status_port) & 0x7F; 1913 } 1914 1915 /* modem status change? (always check before doing output) */ 1916 modem_status = inb(com->modem_status_port); 1917 if (modem_status != com->last_modem_status) { 1918 if (com->do_dcd_timestamp 1919 && !(com->last_modem_status & MSR_DCD) 1920 && modem_status & MSR_DCD) 1921 microtime(&com->dcd_timestamp); 1922 1923 /* 1924 * Schedule high level to handle DCD changes. Note 1925 * that we don't use the delta bits anywhere. Some 1926 * UARTs mess them up, and it's easy to remember the 1927 * previous bits and calculate the delta. 1928 */ 1929 com->last_modem_status = modem_status; 1930 if (!(com->state & CS_CHECKMSR)) { 1931 com_events += LOTS_OF_EVENTS; 1932 com->state |= CS_CHECKMSR; 1933 setsofttty(); 1934 } 1935 1936 /* handle CTS change immediately for crisp flow ctl */ 1937 if (com->state & CS_CTS_OFLOW) { 1938 if (modem_status & MSR_CTS) 1939 com->state |= CS_ODEVREADY; 1940 else 1941 com->state &= ~CS_ODEVREADY; 1942 } 1943 } 1944 1945 /* output queued and everything ready? */ 1946 if ((line_status & LSR_TXRDY) 1947 && com->state >= (CS_BUSY | CS_TTGO | CS_ODEVREADY)) { 1948 ioptr = com->obufq.l_head; 1949 if (com->tx_fifo_size > 1) { 1950 u_int ocount; 1951 1952 ocount = com->obufq.l_tail - ioptr; 1953 if (ocount > com->tx_fifo_size) 1954 ocount = com->tx_fifo_size; 1955 com->bytes_out += ocount; 1956 do 1957 outb(com->data_port, *ioptr++); 1958 while (--ocount != 0); 1959 } else { 1960 outb(com->data_port, *ioptr++); 1961 ++com->bytes_out; 1962 } 1963 com->obufq.l_head = ioptr; 1964 if (COM_IIR_TXRDYBUG(com->flags)) { 1965 int_ctl_new = int_ctl | IER_ETXRDY; 1966 } 1967 if (ioptr >= com->obufq.l_tail) { 1968 struct lbq *qp; 1969 1970 qp = com->obufq.l_next; 1971 qp->l_queued = FALSE; 1972 qp = qp->l_next; 1973 if (qp != NULL) { 1974 com->obufq.l_head = qp->l_head; 1975 com->obufq.l_tail = qp->l_tail; 1976 com->obufq.l_next = qp; 1977 } else { 1978 /* output just completed */ 1979 if (COM_IIR_TXRDYBUG(com->flags)) { 1980 int_ctl_new = int_ctl & ~IER_ETXRDY; 1981 } 1982 com->state &= ~CS_BUSY; 1983 } 1984 if (!(com->state & CS_ODONE)) { 1985 com_events += LOTS_OF_EVENTS; 1986 com->state |= CS_ODONE; 1987 setsofttty(); /* handle at high level ASAP */ 1988 } 1989 } 1990 if (COM_IIR_TXRDYBUG(com->flags) && (int_ctl != int_ctl_new)) { 1991 outb(com->intr_ctl_port, int_ctl_new); 1992 } 1993 } 1994 1995 /* finished? */ 1996 #ifdef COM_MULTIPORT 1997 return; 1998 #else 1999 if (inb(com->int_id_port) & IIR_NOPEND) 2000 return; 2001 #endif 2002 } 2003 } 2004 2005 static int 2006 sioioctl(struct dev_ioctl_args *ap) 2007 { 2008 cdev_t dev = ap->a_head.a_dev; 2009 caddr_t data = ap->a_data; 2010 struct com_s *com; 2011 int error; 2012 int mynor; 2013 struct tty *tp; 2014 #if defined(COMPAT_43) 2015 u_long oldcmd; 2016 struct termios term; 2017 #endif 2018 lwkt_gettoken(&tty_token); 2019 mynor = minor(dev); 2020 2021 com = com_addr(MINOR_TO_UNIT(mynor)); 2022 if (com == NULL || com->gone) { 2023 lwkt_reltoken(&tty_token); 2024 return (ENODEV); 2025 } 2026 if (mynor & CONTROL_MASK) { 2027 struct termios *ct; 2028 2029 switch (mynor & CONTROL_MASK) { 2030 case CONTROL_INIT_STATE: 2031 ct = mynor & CALLOUT_MASK ? &com->it_out : &com->it_in; 2032 break; 2033 case CONTROL_LOCK_STATE: 2034 ct = mynor & CALLOUT_MASK ? &com->lt_out : &com->lt_in; 2035 break; 2036 default: 2037 lwkt_reltoken(&tty_token); 2038 return (ENODEV); /* /dev/nodev */ 2039 } 2040 switch (ap->a_cmd) { 2041 case TIOCSETA: 2042 error = priv_check_cred(ap->a_cred, PRIV_ROOT, 0); 2043 if (error != 0) 2044 return (error); 2045 *ct = *(struct termios *)data; 2046 lwkt_reltoken(&tty_token); 2047 return (0); 2048 case TIOCGETA: 2049 *(struct termios *)data = *ct; 2050 lwkt_reltoken(&tty_token); 2051 return (0); 2052 case TIOCGETD: 2053 *(int *)data = TTYDISC; 2054 lwkt_reltoken(&tty_token); 2055 return (0); 2056 case TIOCGWINSZ: 2057 bzero(data, sizeof(struct winsize)); 2058 lwkt_reltoken(&tty_token); 2059 return (0); 2060 default: 2061 lwkt_reltoken(&tty_token); 2062 return (ENOTTY); 2063 } 2064 } 2065 tp = com->tp; 2066 #if defined(COMPAT_43) 2067 term = tp->t_termios; 2068 oldcmd = ap->a_cmd; 2069 error = ttsetcompat(tp, &ap->a_cmd, data, &term); 2070 if (error != 0) { 2071 lwkt_reltoken(&tty_token); 2072 return (error); 2073 } 2074 if (ap->a_cmd != oldcmd) 2075 data = (caddr_t)&term; 2076 #endif 2077 if (ap->a_cmd == TIOCSETA || ap->a_cmd == TIOCSETAW || 2078 ap->a_cmd == TIOCSETAF) { 2079 int cc; 2080 struct termios *dt = (struct termios *)data; 2081 struct termios *lt = mynor & CALLOUT_MASK 2082 ? &com->lt_out : &com->lt_in; 2083 2084 dt->c_iflag = (tp->t_iflag & lt->c_iflag) 2085 | (dt->c_iflag & ~lt->c_iflag); 2086 dt->c_oflag = (tp->t_oflag & lt->c_oflag) 2087 | (dt->c_oflag & ~lt->c_oflag); 2088 dt->c_cflag = (tp->t_cflag & lt->c_cflag) 2089 | (dt->c_cflag & ~lt->c_cflag); 2090 dt->c_lflag = (tp->t_lflag & lt->c_lflag) 2091 | (dt->c_lflag & ~lt->c_lflag); 2092 for (cc = 0; cc < NCCS; ++cc) 2093 if (lt->c_cc[cc] != 0) 2094 dt->c_cc[cc] = tp->t_cc[cc]; 2095 if (lt->c_ispeed != 0) 2096 dt->c_ispeed = tp->t_ispeed; 2097 if (lt->c_ospeed != 0) 2098 dt->c_ospeed = tp->t_ospeed; 2099 } 2100 error = (*linesw[tp->t_line].l_ioctl)(tp, ap->a_cmd, data, ap->a_fflag, ap->a_cred); 2101 if (error != ENOIOCTL) { 2102 lwkt_reltoken(&tty_token); 2103 return (error); 2104 } 2105 crit_enter(); 2106 error = ttioctl(tp, ap->a_cmd, data, ap->a_fflag); 2107 disc_optim(tp, &tp->t_termios, com); 2108 if (error != ENOIOCTL) { 2109 crit_exit(); 2110 lwkt_reltoken(&tty_token); 2111 return (error); 2112 } 2113 switch (ap->a_cmd) { 2114 case TIOCSBRK: 2115 sio_setreg(com, com_cfcr, com->cfcr_image |= CFCR_SBREAK); 2116 break; 2117 case TIOCCBRK: 2118 sio_setreg(com, com_cfcr, com->cfcr_image &= ~CFCR_SBREAK); 2119 break; 2120 case TIOCSDTR: 2121 (void)commctl(com, TIOCM_DTR, DMBIS); 2122 break; 2123 case TIOCCDTR: 2124 (void)commctl(com, TIOCM_DTR, DMBIC); 2125 break; 2126 /* 2127 * XXX should disallow changing MCR_RTS if CS_RTS_IFLOW is set. The 2128 * changes get undone on the next call to comparam(). 2129 */ 2130 case TIOCMSET: 2131 (void)commctl(com, *(int *)data, DMSET); 2132 break; 2133 case TIOCMBIS: 2134 (void)commctl(com, *(int *)data, DMBIS); 2135 break; 2136 case TIOCMBIC: 2137 (void)commctl(com, *(int *)data, DMBIC); 2138 break; 2139 case TIOCMGET: 2140 *(int *)data = commctl(com, 0, DMGET); 2141 break; 2142 case TIOCMSDTRWAIT: 2143 /* must be root since the wait applies to following logins */ 2144 error = priv_check_cred(ap->a_cred, PRIV_ROOT, 0); 2145 if (error != 0) { 2146 crit_exit(); 2147 lwkt_reltoken(&tty_token); 2148 return (error); 2149 } 2150 com->dtr_wait = *(int *)data * hz / 100; 2151 break; 2152 case TIOCMGDTRWAIT: 2153 *(int *)data = com->dtr_wait * 100 / hz; 2154 break; 2155 case TIOCTIMESTAMP: 2156 com->do_timestamp = TRUE; 2157 *(struct timeval *)data = com->timestamp; 2158 break; 2159 case TIOCDCDTIMESTAMP: 2160 com->do_dcd_timestamp = TRUE; 2161 *(struct timeval *)data = com->dcd_timestamp; 2162 break; 2163 default: 2164 crit_exit(); 2165 error = pps_ioctl(ap->a_cmd, data, &com->pps); 2166 if (error == ENODEV) 2167 error = ENOTTY; 2168 lwkt_reltoken(&tty_token); 2169 return (error); 2170 } 2171 crit_exit(); 2172 lwkt_reltoken(&tty_token); 2173 return (0); 2174 } 2175 2176 static void 2177 siopoll(void *dummy, void *frame) 2178 { 2179 int unit; 2180 2181 lwkt_gettoken(&tty_token); 2182 if (com_events == 0) { 2183 lwkt_reltoken(&tty_token); 2184 return; 2185 } 2186 2187 repeat: 2188 for (unit = 0; unit < sio_numunits; ++unit) { 2189 struct com_s *com; 2190 int incc; 2191 struct tty *tp; 2192 2193 com = com_addr(unit); 2194 if (com == NULL) 2195 continue; 2196 tp = com->tp; 2197 if (tp == NULL || com->gone) { 2198 /* 2199 * Discard any events related to never-opened or 2200 * going-away devices. 2201 */ 2202 com_lock(); 2203 incc = com->iptr - com->ibuf; 2204 com->iptr = com->ibuf; 2205 if (com->state & CS_CHECKMSR) { 2206 incc += LOTS_OF_EVENTS; 2207 com->state &= ~CS_CHECKMSR; 2208 } 2209 com_events -= incc; 2210 com_unlock(); 2211 continue; 2212 } 2213 if (com->iptr != com->ibuf) { 2214 com_lock(); 2215 sioinput(com); 2216 com_unlock(); 2217 } 2218 if (com->state & CS_CHECKMSR) { 2219 u_char delta_modem_status; 2220 2221 com_lock(); 2222 delta_modem_status = com->last_modem_status 2223 ^ com->prev_modem_status; 2224 com->prev_modem_status = com->last_modem_status; 2225 com_events -= LOTS_OF_EVENTS; 2226 com->state &= ~CS_CHECKMSR; 2227 com_unlock(); 2228 if (delta_modem_status & MSR_DCD) 2229 (*linesw[tp->t_line].l_modem) 2230 (tp, com->prev_modem_status & MSR_DCD); 2231 } 2232 if (com->state & CS_ODONE) { 2233 com_lock(); 2234 com_events -= LOTS_OF_EVENTS; 2235 com->state &= ~CS_ODONE; 2236 com_unlock(); 2237 if (!(com->state & CS_BUSY) 2238 && !(com->extra_state & CSE_BUSYCHECK)) { 2239 callout_reset(&com->busy_ch, hz / 100, 2240 siobusycheck, com); 2241 com->extra_state |= CSE_BUSYCHECK; 2242 } 2243 (*linesw[tp->t_line].l_start)(tp); 2244 } 2245 if (com_events == 0) 2246 break; 2247 } 2248 if (com_events >= LOTS_OF_EVENTS) 2249 goto repeat; 2250 lwkt_reltoken(&tty_token); 2251 } 2252 2253 /* 2254 * Called with tty_token held but no com_lock 2255 */ 2256 static int 2257 comparam(struct tty *tp, struct termios *t) 2258 { 2259 u_int cfcr; 2260 int cflag; 2261 struct com_s *com; 2262 u_int divisor; 2263 u_char dlbh; 2264 u_char dlbl; 2265 int unit; 2266 2267 unit = DEV_TO_UNIT(tp->t_dev); 2268 com = com_addr(unit); 2269 if (com == NULL) { 2270 return (ENODEV); 2271 } 2272 2273 /* do historical conversions */ 2274 if (t->c_ispeed == 0) 2275 t->c_ispeed = t->c_ospeed; 2276 2277 /* check requested parameters */ 2278 if (t->c_ospeed == 0) 2279 divisor = 0; 2280 else { 2281 if (t->c_ispeed != t->c_ospeed) 2282 return (EINVAL); 2283 divisor = siodivisor(com->rclk, t->c_ispeed); 2284 if (divisor == 0) 2285 return (EINVAL); 2286 } 2287 2288 /* parameters are OK, convert them to the com struct and the device */ 2289 crit_enter(); 2290 if (divisor == 0) 2291 (void)commctl(com, TIOCM_DTR, DMBIC); /* hang up line */ 2292 else 2293 (void)commctl(com, TIOCM_DTR, DMBIS); 2294 cflag = t->c_cflag; 2295 switch (cflag & CSIZE) { 2296 case CS5: 2297 cfcr = CFCR_5BITS; 2298 break; 2299 case CS6: 2300 cfcr = CFCR_6BITS; 2301 break; 2302 case CS7: 2303 cfcr = CFCR_7BITS; 2304 break; 2305 default: 2306 cfcr = CFCR_8BITS; 2307 break; 2308 } 2309 if (cflag & PARENB) { 2310 cfcr |= CFCR_PENAB; 2311 if (!(cflag & PARODD)) 2312 cfcr |= CFCR_PEVEN; 2313 } 2314 if (cflag & CSTOPB) 2315 cfcr |= CFCR_STOPB; 2316 2317 if (com->hasfifo && divisor != 0) { 2318 /* 2319 * Use a fifo trigger level low enough so that the input 2320 * latency from the fifo is less than about 16 msec and 2321 * the total latency is less than about 30 msec. These 2322 * latencies are reasonable for humans. Serial comms 2323 * protocols shouldn't expect anything better since modem 2324 * latencies are larger. 2325 * 2326 * Interrupts can be held up for long periods of time 2327 * due to inefficiencies in other parts of the kernel, 2328 * certain video cards, etc. Setting the FIFO trigger 2329 * point to MEDH instead of HIGH gives us 694uS of slop 2330 * (8 character times) instead of 173uS (2 character times) 2331 * @ 115200 bps. 2332 */ 2333 com->fifo_image = t->c_ospeed <= 4800 2334 ? FIFO_ENABLE : FIFO_ENABLE | FIFO_RX_MEDH; 2335 #ifdef COM_ESP 2336 /* 2337 * The Hayes ESP card needs the fifo DMA mode bit set 2338 * in compatibility mode. If not, it will interrupt 2339 * for each character received. 2340 */ 2341 if (com->esp) 2342 com->fifo_image |= FIFO_DMA_MODE; 2343 #endif 2344 sio_setreg(com, com_fifo, com->fifo_image); 2345 } 2346 2347 /* 2348 * This returns with interrupts disabled so that we can complete 2349 * the speed change atomically. Keeping interrupts disabled is 2350 * especially important while com_data is hidden. 2351 */ 2352 (void) siosetwater(com, t->c_ispeed); 2353 2354 if (divisor != 0) { 2355 sio_setreg(com, com_cfcr, cfcr | CFCR_DLAB); 2356 /* 2357 * Only set the divisor registers if they would change, 2358 * since on some 16550 incompatibles (UMC8669F), setting 2359 * them while input is arriving them loses sync until 2360 * data stops arriving. 2361 */ 2362 dlbl = divisor & 0xFF; 2363 if (sio_getreg(com, com_dlbl) != dlbl) 2364 sio_setreg(com, com_dlbl, dlbl); 2365 dlbh = divisor >> 8; 2366 if (sio_getreg(com, com_dlbh) != dlbh) 2367 sio_setreg(com, com_dlbh, dlbh); 2368 } 2369 2370 sio_setreg(com, com_cfcr, com->cfcr_image = cfcr); 2371 2372 if (!(tp->t_state & TS_TTSTOP)) 2373 com->state |= CS_TTGO; 2374 2375 if (cflag & CRTS_IFLOW) { 2376 if (com->st16650a) { 2377 sio_setreg(com, com_cfcr, 0xbf); 2378 sio_setreg(com, com_fifo, 2379 sio_getreg(com, com_fifo) | 0x40); 2380 } 2381 com->state |= CS_RTS_IFLOW; 2382 /* 2383 * If CS_RTS_IFLOW just changed from off to on, the change 2384 * needs to be propagated to MCR_RTS. This isn't urgent, 2385 * so do it later by calling comstart() instead of repeating 2386 * a lot of code from comstart() here. 2387 */ 2388 } else if (com->state & CS_RTS_IFLOW) { 2389 com->state &= ~CS_RTS_IFLOW; 2390 /* 2391 * CS_RTS_IFLOW just changed from on to off. Force MCR_RTS 2392 * on here, since comstart() won't do it later. 2393 */ 2394 outb(com->modem_ctl_port, com->mcr_image |= MCR_RTS); 2395 if (com->st16650a) { 2396 sio_setreg(com, com_cfcr, 0xbf); 2397 sio_setreg(com, com_fifo, 2398 sio_getreg(com, com_fifo) & ~0x40); 2399 } 2400 } 2401 2402 2403 /* 2404 * Set up state to handle output flow control. 2405 * XXX - worth handling MDMBUF (DCD) flow control at the lowest level? 2406 * Now has 10+ msec latency, while CTS flow has 50- usec latency. 2407 */ 2408 com->state |= CS_ODEVREADY; 2409 com->state &= ~CS_CTS_OFLOW; 2410 if (cflag & CCTS_OFLOW) { 2411 com->state |= CS_CTS_OFLOW; 2412 if (!(com->last_modem_status & MSR_CTS)) 2413 com->state &= ~CS_ODEVREADY; 2414 if (com->st16650a) { 2415 sio_setreg(com, com_cfcr, 0xbf); 2416 sio_setreg(com, com_fifo, 2417 sio_getreg(com, com_fifo) | 0x80); 2418 } 2419 } else { 2420 if (com->st16650a) { 2421 sio_setreg(com, com_cfcr, 0xbf); 2422 sio_setreg(com, com_fifo, 2423 sio_getreg(com, com_fifo) & ~0x80); 2424 } 2425 } 2426 2427 sio_setreg(com, com_cfcr, com->cfcr_image); 2428 2429 /* XXX shouldn't call functions while intrs are disabled. */ 2430 disc_optim(tp, t, com); 2431 /* 2432 * Recover from fiddling with CS_TTGO. We used to call siointr1() 2433 * unconditionally, but that defeated the careful discarding of 2434 * stale input in sioopen(). 2435 */ 2436 if (com->state >= (CS_BUSY | CS_TTGO)) { 2437 com_lock(); 2438 siointr1(com); 2439 com_unlock(); 2440 } 2441 crit_exit(); 2442 comstart(tp); 2443 if (com->ibufold != NULL) { 2444 kfree(com->ibufold, M_DEVBUF); 2445 com->ibufold = NULL; 2446 } 2447 return (0); 2448 } 2449 2450 /* 2451 * called with tty_token held 2452 */ 2453 static int 2454 siosetwater(struct com_s *com, speed_t speed) 2455 { 2456 int cp4ticks; 2457 u_char *ibuf; 2458 int ibufsize; 2459 struct tty *tp; 2460 2461 /* 2462 * Make the buffer size large enough to handle a softtty interrupt 2463 * latency of about 2 ticks without loss of throughput or data 2464 * (about 3 ticks if input flow control is not used or not honoured, 2465 * but a bit less for CS5-CS7 modes). 2466 */ 2467 cp4ticks = speed / 10 / hz * 4; 2468 for (ibufsize = 128; ibufsize < cp4ticks;) 2469 ibufsize <<= 1; 2470 if (ibufsize == com->ibufsize) 2471 return (0); 2472 2473 /* 2474 * Allocate input buffer. The extra factor of 2 in the size is 2475 * to allow for an error byte for each input byte. 2476 */ 2477 ibuf = kmalloc(2 * ibufsize, M_DEVBUF, M_WAITOK | M_ZERO); 2478 2479 /* Initialize non-critical variables. */ 2480 com->ibufold = com->ibuf; 2481 com->ibufsize = ibufsize; 2482 tp = com->tp; 2483 if (tp != NULL) { 2484 tp->t_ififosize = 2 * ibufsize; 2485 tp->t_ispeedwat = (speed_t)-1; 2486 tp->t_ospeedwat = (speed_t)-1; 2487 } 2488 2489 /* 2490 * Read current input buffer. 2491 */ 2492 com_lock(); 2493 if (com->iptr != com->ibuf) 2494 sioinput(com); 2495 2496 /*- 2497 * Initialize critical variables, including input buffer watermarks. 2498 * The external device is asked to stop sending when the buffer 2499 * exactly reaches high water, or when the high level requests it. 2500 * The high level is notified immediately (rather than at a later 2501 * clock tick) when this watermark is reached. 2502 * The buffer size is chosen so the watermark should almost never 2503 * be reached. 2504 * The low watermark is invisibly 0 since the buffer is always 2505 * emptied all at once. 2506 */ 2507 com->iptr = com->ibuf = ibuf; 2508 com->ibufend = ibuf + ibufsize; 2509 com->ierroff = ibufsize; 2510 com->ihighwater = ibuf + 3 * ibufsize / 4; 2511 com_unlock(); 2512 return (0); 2513 } 2514 2515 static void 2516 comstart(struct tty *tp) 2517 { 2518 struct com_s *com; 2519 int unit; 2520 2521 lwkt_gettoken(&tty_token); 2522 unit = DEV_TO_UNIT(tp->t_dev); 2523 com = com_addr(unit); 2524 if (com == NULL) { 2525 lwkt_reltoken(&tty_token); 2526 return; 2527 } 2528 crit_enter(); 2529 com_lock(); 2530 if (tp->t_state & TS_TTSTOP) 2531 com->state &= ~CS_TTGO; 2532 else 2533 com->state |= CS_TTGO; 2534 if (tp->t_state & TS_TBLOCK) { 2535 if (com->mcr_image & MCR_RTS && com->state & CS_RTS_IFLOW) 2536 outb(com->modem_ctl_port, com->mcr_image &= ~MCR_RTS); 2537 } else { 2538 if (!(com->mcr_image & MCR_RTS) && com->iptr < com->ihighwater 2539 && com->state & CS_RTS_IFLOW) 2540 outb(com->modem_ctl_port, com->mcr_image |= MCR_RTS); 2541 } 2542 com_unlock(); 2543 if (tp->t_state & (TS_TIMEOUT | TS_TTSTOP)) { 2544 ttwwakeup(tp); 2545 crit_exit(); 2546 lwkt_reltoken(&tty_token); 2547 return; 2548 } 2549 if (tp->t_outq.c_cc != 0) { 2550 struct lbq *qp; 2551 struct lbq *next; 2552 2553 if (!com->obufs[0].l_queued) { 2554 com->obufs[0].l_tail 2555 = com->obuf1 + q_to_b(&tp->t_outq, com->obuf1, 2556 sizeof com->obuf1); 2557 com->obufs[0].l_next = NULL; 2558 com->obufs[0].l_queued = TRUE; 2559 com_lock(); 2560 if (com->state & CS_BUSY) { 2561 qp = com->obufq.l_next; 2562 while ((next = qp->l_next) != NULL) 2563 qp = next; 2564 qp->l_next = &com->obufs[0]; 2565 } else { 2566 com->obufq.l_head = com->obufs[0].l_head; 2567 com->obufq.l_tail = com->obufs[0].l_tail; 2568 com->obufq.l_next = &com->obufs[0]; 2569 com->state |= CS_BUSY; 2570 } 2571 com_unlock(); 2572 } 2573 if (tp->t_outq.c_cc != 0 && !com->obufs[1].l_queued) { 2574 com->obufs[1].l_tail 2575 = com->obuf2 + q_to_b(&tp->t_outq, com->obuf2, 2576 sizeof com->obuf2); 2577 com->obufs[1].l_next = NULL; 2578 com->obufs[1].l_queued = TRUE; 2579 com_lock(); 2580 if (com->state & CS_BUSY) { 2581 qp = com->obufq.l_next; 2582 while ((next = qp->l_next) != NULL) 2583 qp = next; 2584 qp->l_next = &com->obufs[1]; 2585 } else { 2586 com->obufq.l_head = com->obufs[1].l_head; 2587 com->obufq.l_tail = com->obufs[1].l_tail; 2588 com->obufq.l_next = &com->obufs[1]; 2589 com->state |= CS_BUSY; 2590 } 2591 com_unlock(); 2592 } 2593 tp->t_state |= TS_BUSY; 2594 } 2595 com_lock(); 2596 if (com->state >= (CS_BUSY | CS_TTGO)) 2597 siointr1(com); /* fake interrupt to start output */ 2598 com_unlock(); 2599 ttwwakeup(tp); 2600 crit_exit(); 2601 lwkt_reltoken(&tty_token); 2602 } 2603 2604 static void 2605 comstop(struct tty *tp, int rw) 2606 { 2607 struct com_s *com; 2608 2609 lwkt_gettoken(&tty_token); 2610 com = com_addr(DEV_TO_UNIT(tp->t_dev)); 2611 if (com == NULL || com->gone) { 2612 lwkt_reltoken(&tty_token); 2613 return; 2614 } 2615 com_lock(); 2616 if (rw & FWRITE) { 2617 if (com->hasfifo) 2618 #ifdef COM_ESP 2619 /* XXX avoid h/w bug. */ 2620 if (!com->esp) 2621 #endif 2622 sio_setreg(com, com_fifo, 2623 FIFO_XMT_RST | com->fifo_image); 2624 com->obufs[0].l_queued = FALSE; 2625 com->obufs[1].l_queued = FALSE; 2626 if (com->state & CS_ODONE) 2627 com_events -= LOTS_OF_EVENTS; 2628 com->state &= ~(CS_ODONE | CS_BUSY); 2629 com->tp->t_state &= ~TS_BUSY; 2630 } 2631 if (rw & FREAD) { 2632 if (com->hasfifo) 2633 #ifdef COM_ESP 2634 /* XXX avoid h/w bug. */ 2635 if (!com->esp) 2636 #endif 2637 sio_setreg(com, com_fifo, 2638 FIFO_RCV_RST | com->fifo_image); 2639 com_events -= (com->iptr - com->ibuf); 2640 com->iptr = com->ibuf; 2641 } 2642 com_unlock(); 2643 comstart(tp); 2644 lwkt_reltoken(&tty_token); 2645 } 2646 2647 static int 2648 commctl(struct com_s *com, int bits, int how) 2649 { 2650 int mcr; 2651 int msr; 2652 2653 lwkt_gettoken(&tty_token); 2654 if (how == DMGET) { 2655 bits = TIOCM_LE; /* XXX - always enabled while open */ 2656 mcr = com->mcr_image; 2657 if (mcr & MCR_DTR) 2658 bits |= TIOCM_DTR; 2659 if (mcr & MCR_RTS) 2660 bits |= TIOCM_RTS; 2661 msr = com->prev_modem_status; 2662 if (msr & MSR_CTS) 2663 bits |= TIOCM_CTS; 2664 if (msr & MSR_DCD) 2665 bits |= TIOCM_CD; 2666 if (msr & MSR_DSR) 2667 bits |= TIOCM_DSR; 2668 /* 2669 * XXX - MSR_RI is naturally volatile, and we make MSR_TERI 2670 * more volatile by reading the modem status a lot. Perhaps 2671 * we should latch both bits until the status is read here. 2672 */ 2673 if (msr & (MSR_RI | MSR_TERI)) 2674 bits |= TIOCM_RI; 2675 lwkt_reltoken(&tty_token); 2676 return (bits); 2677 } 2678 mcr = 0; 2679 if (bits & TIOCM_DTR) 2680 mcr |= MCR_DTR; 2681 if (bits & TIOCM_RTS) 2682 mcr |= MCR_RTS; 2683 if (com->gone) { 2684 lwkt_reltoken(&tty_token); 2685 return(0); 2686 } 2687 com_lock(); 2688 switch (how) { 2689 case DMSET: 2690 outb(com->modem_ctl_port, 2691 com->mcr_image = mcr | (com->mcr_image & MCR_IENABLE)); 2692 break; 2693 case DMBIS: 2694 outb(com->modem_ctl_port, com->mcr_image |= mcr); 2695 break; 2696 case DMBIC: 2697 outb(com->modem_ctl_port, com->mcr_image &= ~mcr); 2698 break; 2699 } 2700 com_unlock(); 2701 lwkt_reltoken(&tty_token); 2702 return (0); 2703 } 2704 2705 /* 2706 * NOTE: Must be called with tty_token held 2707 */ 2708 static void 2709 siosettimeout(void) 2710 { 2711 struct com_s *com; 2712 bool_t someopen; 2713 int unit; 2714 2715 ASSERT_LWKT_TOKEN_HELD(&tty_token); 2716 /* 2717 * Set our timeout period to 1 second if no polled devices are open. 2718 * Otherwise set it to max(1/200, 1/hz). 2719 * Enable timeouts iff some device is open. 2720 */ 2721 callout_stop(&sio_timeout_handle); 2722 sio_timeout = hz; 2723 someopen = FALSE; 2724 for (unit = 0; unit < sio_numunits; ++unit) { 2725 com = com_addr(unit); 2726 if (com != NULL && com->tp != NULL 2727 && com->tp->t_state & TS_ISOPEN && !com->gone) { 2728 someopen = TRUE; 2729 if (com->poll || com->poll_output) { 2730 sio_timeout = hz > 200 ? hz / 200 : 1; 2731 break; 2732 } 2733 } 2734 } 2735 if (someopen) { 2736 sio_timeouts_until_log = hz / sio_timeout; 2737 callout_reset(&sio_timeout_handle, sio_timeout, 2738 comwakeup, NULL); 2739 } else { 2740 /* Flush error messages, if any. */ 2741 sio_timeouts_until_log = 1; 2742 comwakeup(NULL); 2743 callout_stop(&sio_timeout_handle); 2744 } 2745 } 2746 2747 /* 2748 * NOTE: Must be called with tty_token held 2749 */ 2750 static void 2751 comwakeup(void *chan) 2752 { 2753 struct com_s *com; 2754 int unit; 2755 2756 /* 2757 * Can be called from a callout too so just get the token 2758 */ 2759 lwkt_gettoken(&tty_token); 2760 callout_reset(&sio_timeout_handle, sio_timeout, comwakeup, NULL); 2761 2762 /* 2763 * Recover from lost output interrupts. 2764 * Poll any lines that don't use interrupts. 2765 */ 2766 for (unit = 0; unit < sio_numunits; ++unit) { 2767 com = com_addr(unit); 2768 if (com != NULL && !com->gone 2769 && (com->state >= (CS_BUSY | CS_TTGO) || com->poll)) { 2770 com_lock(); 2771 siointr1(com); 2772 com_unlock(); 2773 } 2774 } 2775 2776 /* 2777 * Check for and log errors, but not too often. 2778 */ 2779 if (--sio_timeouts_until_log > 0) { 2780 lwkt_reltoken(&tty_token); 2781 return; 2782 } 2783 sio_timeouts_until_log = hz / sio_timeout; 2784 for (unit = 0; unit < sio_numunits; ++unit) { 2785 int errnum; 2786 2787 com = com_addr(unit); 2788 if (com == NULL) 2789 continue; 2790 if (com->gone) 2791 continue; 2792 for (errnum = 0; errnum < CE_NTYPES; ++errnum) { 2793 u_int delta; 2794 u_long total; 2795 2796 com_lock(); 2797 delta = com->delta_error_counts[errnum]; 2798 com->delta_error_counts[errnum] = 0; 2799 com_unlock(); 2800 if (delta == 0) 2801 continue; 2802 total = com->error_counts[errnum] += delta; 2803 log(LOG_ERR, "sio%d: %u more %s%s (total %lu)\n", 2804 unit, delta, error_desc[errnum], 2805 delta == 1 ? "" : "s", total); 2806 } 2807 } 2808 lwkt_reltoken(&tty_token); 2809 } 2810 2811 static void 2812 disc_optim(struct tty *tp, struct termios *t, struct com_s *com) 2813 { 2814 lwkt_gettoken(&tty_token); 2815 if (!(t->c_iflag & (ICRNL | IGNCR | IMAXBEL | INLCR | ISTRIP | IXON)) 2816 && (!(t->c_iflag & BRKINT) || (t->c_iflag & IGNBRK)) 2817 && (!(t->c_iflag & PARMRK) 2818 || (t->c_iflag & (IGNPAR | IGNBRK)) == (IGNPAR | IGNBRK)) 2819 && !(t->c_lflag & (ECHO | ICANON | IEXTEN | ISIG | PENDIN)) 2820 && linesw[tp->t_line].l_rint == ttyinput) 2821 tp->t_state |= TS_CAN_BYPASS_L_RINT; 2822 else 2823 tp->t_state &= ~TS_CAN_BYPASS_L_RINT; 2824 com->hotchar = linesw[tp->t_line].l_hotchar; 2825 lwkt_reltoken(&tty_token); 2826 } 2827 2828 /* 2829 * Following are all routines needed for SIO to act as console 2830 */ 2831 #include <sys/cons.h> 2832 2833 struct siocnstate { 2834 u_char dlbl; 2835 u_char dlbh; 2836 u_char ier; 2837 u_char cfcr; 2838 u_char mcr; 2839 }; 2840 2841 static speed_t siocngetspeed (Port_t, u_long rclk); 2842 #if 0 2843 static void siocnclose (struct siocnstate *sp, Port_t iobase); 2844 #endif 2845 static void siocnopen (struct siocnstate *sp, Port_t iobase, int speed); 2846 static void siocntxwait (Port_t iobase); 2847 2848 static cn_probe_t siocnprobe; 2849 static cn_init_t siocninit; 2850 static cn_init_fini_t siocninit_fini; 2851 static cn_checkc_t siocncheckc; 2852 static cn_getc_t siocngetc; 2853 static cn_putc_t siocnputc; 2854 2855 #if defined(__i386__) || defined(__x86_64__) 2856 CONS_DRIVER(sio, siocnprobe, siocninit, siocninit_fini, 2857 NULL, siocngetc, siocncheckc, siocnputc, NULL); 2858 #endif 2859 2860 /* To get the GDB related variables */ 2861 #if DDB > 0 2862 #include <ddb/ddb.h> 2863 #endif 2864 2865 static void 2866 siocntxwait(Port_t iobase) 2867 { 2868 int timo; 2869 2870 /* 2871 * Wait for any pending transmission to finish. Required to avoid 2872 * the UART lockup bug when the speed is changed, and for normal 2873 * transmits. 2874 */ 2875 timo = 100000; 2876 while ((inb(iobase + com_lsr) & (LSR_TSRE | LSR_TXRDY)) 2877 != (LSR_TSRE | LSR_TXRDY) && --timo != 0) 2878 ; 2879 } 2880 2881 /* 2882 * Read the serial port specified and try to figure out what speed 2883 * it's currently running at. We're assuming the serial port has 2884 * been initialized and is basicly idle. This routine is only intended 2885 * to be run at system startup. 2886 * 2887 * If the value read from the serial port doesn't make sense, return 0. 2888 */ 2889 /* 2890 * NOTE: Must be called with tty_token held 2891 */ 2892 static speed_t 2893 siocngetspeed(Port_t iobase, u_long rclk) 2894 { 2895 u_int divisor; 2896 u_char dlbh; 2897 u_char dlbl; 2898 u_char cfcr; 2899 2900 cfcr = inb(iobase + com_cfcr); 2901 outb(iobase + com_cfcr, CFCR_DLAB | cfcr); 2902 2903 dlbl = inb(iobase + com_dlbl); 2904 dlbh = inb(iobase + com_dlbh); 2905 2906 outb(iobase + com_cfcr, cfcr); 2907 2908 divisor = dlbh << 8 | dlbl; 2909 2910 /* XXX there should be more sanity checking. */ 2911 if (divisor == 0) 2912 return (CONSPEED); 2913 return (rclk / (16UL * divisor)); 2914 } 2915 2916 static void 2917 siocnopen(struct siocnstate *sp, Port_t iobase, int speed) 2918 { 2919 u_int divisor; 2920 u_char dlbh; 2921 u_char dlbl; 2922 2923 /* 2924 * Save all the device control registers except the fifo register 2925 * and set our default ones (cs8 -parenb speed=comdefaultrate). 2926 * We can't save the fifo register since it is read-only. 2927 */ 2928 sp->ier = inb(iobase + com_ier); 2929 outb(iobase + com_ier, 0); /* spltty() doesn't stop siointr() */ 2930 siocntxwait(iobase); 2931 sp->cfcr = inb(iobase + com_cfcr); 2932 outb(iobase + com_cfcr, CFCR_DLAB | CFCR_8BITS); 2933 sp->dlbl = inb(iobase + com_dlbl); 2934 sp->dlbh = inb(iobase + com_dlbh); 2935 /* 2936 * Only set the divisor registers if they would change, since on 2937 * some 16550 incompatibles (Startech), setting them clears the 2938 * data input register. This also reduces the effects of the 2939 * UMC8669F bug. 2940 */ 2941 divisor = siodivisor(comdefaultrclk, speed); 2942 dlbl = divisor & 0xFF; 2943 if (sp->dlbl != dlbl) 2944 outb(iobase + com_dlbl, dlbl); 2945 dlbh = divisor >> 8; 2946 if (sp->dlbh != dlbh) 2947 outb(iobase + com_dlbh, dlbh); 2948 outb(iobase + com_cfcr, CFCR_8BITS); 2949 sp->mcr = inb(iobase + com_mcr); 2950 /* 2951 * We don't want interrupts, but must be careful not to "disable" 2952 * them by clearing the MCR_IENABLE bit, since that might cause 2953 * an interrupt by floating the IRQ line. 2954 */ 2955 outb(iobase + com_mcr, (sp->mcr & MCR_IENABLE) | MCR_DTR | MCR_RTS); 2956 } 2957 2958 #if 0 2959 static void 2960 siocnclose(struct siocnstate *sp, Port_t iobase) 2961 { 2962 /* 2963 * Restore the device control registers. 2964 */ 2965 siocntxwait(iobase); 2966 outb(iobase + com_cfcr, CFCR_DLAB | CFCR_8BITS); 2967 if (sp->dlbl != inb(iobase + com_dlbl)) 2968 outb(iobase + com_dlbl, sp->dlbl); 2969 if (sp->dlbh != inb(iobase + com_dlbh)) 2970 outb(iobase + com_dlbh, sp->dlbh); 2971 outb(iobase + com_cfcr, sp->cfcr); 2972 /* 2973 * XXX damp oscillations of MCR_DTR and MCR_RTS by not restoring them. 2974 */ 2975 outb(iobase + com_mcr, sp->mcr | MCR_DTR | MCR_RTS); 2976 outb(iobase + com_ier, sp->ier); 2977 } 2978 #endif 2979 2980 static void 2981 siocnprobe(struct consdev *cp) 2982 { 2983 u_char cfcr; 2984 u_int divisor; 2985 int unit; 2986 struct siocnstate sp; 2987 2988 /* 2989 * Find our first enabled console, if any. If it is a high-level 2990 * console device, then initialize it and return successfully. 2991 * If it is a low-level console device, then initialize it and 2992 * return unsuccessfully. It must be initialized in both cases 2993 * for early use by console drivers and debuggers. Initializing 2994 * the hardware is not necessary in all cases, since the i/o 2995 * routines initialize it on the fly, but it is necessary if 2996 * input might arrive while the hardware is switched back to an 2997 * uninitialized state. We can't handle multiple console devices 2998 * yet because our low-level routines don't take a device arg. 2999 * We trust the user to set the console flags properly so that we 3000 * don't need to probe. 3001 */ 3002 cp->cn_pri = CN_DEAD; 3003 3004 for (unit = 0; unit < 16; unit++) { /* XXX need to know how many */ 3005 int flags; 3006 int disabled; 3007 if (resource_int_value("sio", unit, "disabled", &disabled) == 0) { 3008 if (disabled) 3009 continue; 3010 } 3011 if (resource_int_value("sio", unit, "flags", &flags)) 3012 continue; 3013 if (COM_CONSOLE(flags) || COM_DEBUGGER(flags)) { 3014 int port; 3015 int baud; 3016 Port_t iobase; 3017 speed_t boot_speed; 3018 3019 if (resource_int_value("sio", unit, "port", &port)) 3020 continue; 3021 if (resource_int_value("sio", unit, "baud", &baud) == 0) 3022 boot_speed = baud; 3023 else 3024 boot_speed = 0; 3025 iobase = port; 3026 crit_enter(); 3027 if (boothowto & RB_SERIAL) { 3028 if (boot_speed == 0) { 3029 boot_speed = siocngetspeed(iobase, 3030 comdefaultrclk); 3031 } 3032 if (boot_speed) 3033 comdefaultrate = boot_speed; 3034 } 3035 3036 /* 3037 * Initialize the divisor latch. We can't rely on 3038 * siocnopen() to do this the first time, since it 3039 * avoids writing to the latch if the latch appears 3040 * to have the correct value. Also, if we didn't 3041 * just read the speed from the hardware, then we 3042 * need to set the speed in hardware so that 3043 * switching it later is null. 3044 */ 3045 com_lock(); 3046 cfcr = inb(iobase + com_cfcr); 3047 outb(iobase + com_cfcr, CFCR_DLAB | cfcr); 3048 divisor = siodivisor(comdefaultrclk, comdefaultrate); 3049 outb(iobase + com_dlbl, divisor & 0xff); 3050 outb(iobase + com_dlbh, divisor >> 8); 3051 outb(iobase + com_cfcr, cfcr); 3052 3053 siocnopen(&sp, iobase, comdefaultrate); 3054 com_unlock(); 3055 3056 crit_exit(); 3057 if (COM_CONSOLE(flags) && !COM_LLCONSOLE(flags)) { 3058 cp->cn_probegood = 1; 3059 cp->cn_private = (void *)(intptr_t)unit; 3060 cp->cn_pri = COM_FORCECONSOLE(flags) 3061 || boothowto & RB_SERIAL 3062 ? CN_REMOTE : CN_NORMAL; 3063 siocniobase = iobase; 3064 siocnunit = unit; 3065 } 3066 if (COM_DEBUGGER(flags) && gdb_tab == NULL) { 3067 kprintf("sio%d: gdb debugging port\n", unit); 3068 siogdbiobase = iobase; 3069 siogdbunit = unit; 3070 #if DDB > 0 3071 cp->cn_gdbprivate = (void *)(intptr_t)unit; 3072 gdb_tab = cp; 3073 #endif 3074 } 3075 } 3076 } 3077 #if defined(__i386__) || defined(__x86_64__) 3078 #if DDB > 0 3079 /* 3080 * XXX Ugly Compatability. 3081 * If no gdb port has been specified, set it to be the console 3082 * as some configuration files don't specify the gdb port. 3083 */ 3084 if (gdb_tab == NULL && (boothowto & RB_GDB)) { 3085 kprintf("Warning: no GDB port specified. Defaulting to sio%d.\n", 3086 siocnunit); 3087 kprintf("Set flag 0x80 on desired GDB port in your\n"); 3088 kprintf("configuration file (currently sio only).\n"); 3089 siogdbiobase = siocniobase; 3090 siogdbunit = siocnunit; 3091 cp->cn_gdbprivate = (void *)(intptr_t)siocnunit; 3092 gdb_tab = cp; 3093 } 3094 #endif 3095 #endif 3096 } 3097 3098 static void 3099 siocninit(struct consdev *cp) 3100 { 3101 comconsole = (int)(intptr_t)cp->cn_private; 3102 } 3103 3104 static void 3105 siocninit_fini(struct consdev *cp) 3106 { 3107 cdev_t dev; 3108 int unit; 3109 3110 if (cp->cn_probegood) { 3111 unit = (int)(intptr_t)cp->cn_private; 3112 /* 3113 * Call devfs_find_device_by_name on ttydX to find the correct device, 3114 * as it should have been created already at this point by the 3115 * attach routine. 3116 * If it isn't found, the serial port was not attached at all and we 3117 * shouldn't be here, so assert this case. 3118 */ 3119 dev = devfs_find_device_by_name("ttyd%r", unit); 3120 3121 KKASSERT(dev != NULL); 3122 cp->cn_dev = dev; 3123 } 3124 } 3125 3126 static int 3127 siocncheckc(void *private) 3128 { 3129 int c; 3130 int unit = (int)(intptr_t)private; 3131 Port_t iobase; 3132 #if 0 3133 struct siocnstate sp; 3134 #endif 3135 3136 if (unit == siogdbunit) 3137 iobase = siogdbiobase; 3138 else 3139 iobase = siocniobase; 3140 com_lock(); 3141 crit_enter(); 3142 #if 0 3143 siocnopen(&sp, iobase, comdefaultrate); 3144 #endif 3145 if (inb(iobase + com_lsr) & LSR_RXRDY) 3146 c = inb(iobase + com_data); 3147 else 3148 c = -1; 3149 #if 0 3150 siocnclose(&sp, iobase); 3151 #endif 3152 crit_exit(); 3153 com_unlock(); 3154 return (c); 3155 } 3156 3157 3158 int 3159 siocngetc(void *private) 3160 { 3161 int c; 3162 int unit = (int)(intptr_t)private; 3163 Port_t iobase; 3164 #if 0 3165 struct siocnstate sp; 3166 #endif 3167 3168 if (unit == siogdbunit) 3169 iobase = siogdbiobase; 3170 else 3171 iobase = siocniobase; 3172 com_lock(); 3173 crit_enter(); 3174 #if 0 3175 siocnopen(&sp, iobase, comdefaultrate); 3176 #endif 3177 while (!(inb(iobase + com_lsr) & LSR_RXRDY)) 3178 ; 3179 c = inb(iobase + com_data); 3180 #if 0 3181 siocnclose(&sp, iobase); 3182 #endif 3183 crit_exit(); 3184 com_unlock(); 3185 return (c); 3186 } 3187 3188 void 3189 siocnputc(void *private, int c) 3190 { 3191 int unit = (int)(intptr_t)private; 3192 #if 0 3193 struct siocnstate sp; 3194 #endif 3195 Port_t iobase; 3196 3197 if (unit == siogdbunit) 3198 iobase = siogdbiobase; 3199 else 3200 iobase = siocniobase; 3201 com_lock(); 3202 crit_enter(); 3203 #if 0 3204 siocnopen(&sp, iobase, comdefaultrate); 3205 #endif 3206 siocntxwait(iobase); 3207 outb(iobase + com_data, c); 3208 #if 0 3209 siocnclose(&sp, iobase); 3210 #endif 3211 crit_exit(); 3212 com_unlock(); 3213 } 3214 3215 DRIVER_MODULE(sio, isa, sio_isa_driver, sio_devclass, NULL, NULL); 3216 DRIVER_MODULE(sio, acpi, sio_isa_driver, sio_devclass, NULL, NULL); 3217 #if NPCI > 0 3218 DRIVER_MODULE(sio, pci, sio_pci_driver, sio_devclass, NULL, NULL); 3219 #endif 3220 #if NPUC > 0 3221 DRIVER_MODULE(sio, puc, sio_puc_driver, sio_devclass, NULL, NULL); 3222 #endif 3223