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 { 0x8c3d8086, "Intel Lynx Point KT Controller", 0x10 }, 366 { 0x9c3d8086, "Intel Lynx Point-LP HECI KT", 0x10 }, 367 { 0x8cbd8086, "Intel Wildcat Point KT Controller", 0x10 }, 368 { 0x9cbd8086, "Intel Wildcat Point-LP KT Controller", 0x10 }, 369 { 0x00000000, NULL, 0 } 370 }; 371 372 static int 373 sio_pci_attach(device_t dev) 374 { 375 u_int32_t type; 376 struct pci_ids *id; 377 378 type = pci_get_devid(dev); 379 id = pci_ids; 380 while (id->type && id->type != type) 381 id++; 382 if (id->desc == NULL) 383 return (ENXIO); 384 sio_pci_kludge_unit(dev); 385 return (sioattach(dev, id->rid, 0UL)); 386 } 387 388 /* 389 * Don't cut and paste this to other drivers. It is a horrible kludge 390 * which will fail to work and also be unnecessary in future versions. 391 */ 392 static void 393 sio_pci_kludge_unit(device_t dev) 394 { 395 devclass_t dc; 396 int err; 397 int start; 398 int unit; 399 400 unit = 0; 401 start = 0; 402 while (resource_int_value("sio", unit, "port", &start) == 0 && 403 start > 0) 404 unit++; 405 if (device_get_unit(dev) < unit) { 406 dc = device_get_devclass(dev); 407 while (devclass_get_device(dc, unit)) 408 unit++; 409 device_printf(dev, "moving to sio%d\n", unit); 410 err = device_set_unit(dev, unit); /* EVIL DO NOT COPY */ 411 if (err) 412 device_printf(dev, "error moving device %d\n", err); 413 } 414 } 415 416 static int 417 sio_pci_probe(device_t dev) 418 { 419 u_int32_t type; 420 struct pci_ids *id; 421 422 type = pci_get_devid(dev); 423 id = pci_ids; 424 while (id->type && id->type != type) 425 id++; 426 if (id->desc == NULL) 427 return (ENXIO); 428 device_set_desc(dev, id->desc); 429 return (sioprobe(dev, id->rid, 0UL)); 430 } 431 #endif /* NPCI > 0 */ 432 433 #if NPUC > 0 434 static int 435 sio_puc_attach(device_t dev) 436 { 437 uintptr_t rclk; 438 439 if (BUS_READ_IVAR(device_get_parent(dev), dev, PUC_IVAR_FREQ, 440 &rclk) != 0) 441 rclk = DEFAULT_RCLK; 442 return (sioattach(dev, 0, rclk)); 443 } 444 445 static int 446 sio_puc_probe(device_t dev) 447 { 448 uintptr_t rclk; 449 450 if (BUS_READ_IVAR(device_get_parent(dev), dev, PUC_IVAR_FREQ, 451 &rclk) != 0) 452 rclk = DEFAULT_RCLK; 453 return (sioprobe(dev, 0, rclk)); 454 } 455 #endif /* NPUC */ 456 457 static struct isa_pnp_id sio_ids[] = { 458 {0x0005d041, "Standard PC COM port"}, /* PNP0500 */ 459 {0x0105d041, "16550A-compatible COM port"}, /* PNP0501 */ 460 {0x0205d041, "Multiport serial device (non-intelligent 16550)"}, /* PNP0502 */ 461 {0x1005d041, "Generic IRDA-compatible device"}, /* PNP0510 */ 462 {0x1105d041, "Generic IRDA-compatible device"}, /* PNP0511 */ 463 /* Devices that do not have a compatid */ 464 {0x12206804, NULL}, /* ACH2012 - 5634BTS 56K Video Ready Modem */ 465 {0x7602a904, NULL}, /* AEI0276 - 56K v.90 Fax Modem (LKT) */ 466 {0x00007905, NULL}, /* AKY0000 - 56K Plug&Play Modem */ 467 {0x21107905, NULL}, /* AKY1021 - 56K Plug&Play Modem */ 468 {0x01405407, NULL}, /* AZT4001 - AZT3000 PnP SOUND DEVICE, MODEM */ 469 {0x56039008, NULL}, /* BDP0356 - Best Data 56x2 */ 470 {0x56159008, NULL}, /* BDP1556 - B.D. Smart One 56SPS,Voice Modem*/ 471 {0x36339008, NULL}, /* BDP3336 - Best Data Prods. 336F */ 472 {0x0014490a, NULL}, /* BRI1400 - Boca 33.6 PnP */ 473 {0x0015490a, NULL}, /* BRI1500 - Internal Fax Data */ 474 {0x0034490a, NULL}, /* BRI3400 - Internal ACF Modem */ 475 {0x0094490a, NULL}, /* BRI9400 - Boca K56Flex PnP */ 476 {0x00b4490a, NULL}, /* BRIB400 - Boca 56k PnP */ 477 {0x0030320d, NULL}, /* CIR3000 - Cirrus Logic V43 */ 478 {0x0100440e, NULL}, /* CRD0001 - Cardinal MVP288IV ? */ 479 {0x01308c0e, NULL}, /* CTL3001 - Creative Labs Phoneblaster */ 480 {0x36033610, NULL}, /* DAV0336 - DAVICOM 336PNP MODEM */ 481 {0x01009416, NULL}, /* ETT0001 - E-Tech Bullet 33k6 PnP */ 482 {0x0000aa1a, NULL}, /* FUJ0000 - FUJITSU Modem 33600 PNP/I2 */ 483 {0x1200c31e, NULL}, /* GVC0012 - VF1128HV-R9 (win modem?) */ 484 {0x0303c31e, NULL}, /* GVC0303 - MaxTech 33.6 PnP D/F/V */ 485 {0x0505c31e, NULL}, /* GVC0505 - GVC 56k Faxmodem */ 486 {0x0116c31e, NULL}, /* GVC1601 - Rockwell V.34 Plug & Play Modem */ 487 {0x0050c31e, NULL}, /* GVC5000 - some GVC modem */ 488 {0x3800f91e, NULL}, /* GWY0038 - Telepath with v.90 */ 489 {0x9062f91e, NULL}, /* GWY6290 - Telepath with x2 Technology */ 490 {0x8100e425, NULL}, /* IOD0081 - I-O DATA DEVICE,INC. IFML-560 */ 491 {0x21002534, NULL}, /* MAE0021 - Jetstream Int V.90 56k Voice Series 2*/ 492 {0x0000f435, NULL}, /* MOT0000 - Motorola ModemSURFR 33.6 Intern */ 493 {0x5015f435, NULL}, /* MOT1550 - Motorola ModemSURFR 56K Modem */ 494 {0xf015f435, NULL}, /* MOT15F0 - Motorola VoiceSURFR 56K Modem */ 495 {0x6045f435, NULL}, /* MOT4560 - Motorola ? */ 496 {0x61e7a338, NULL}, /* NECE761 - 33.6Modem */ 497 {0x08804f3f, NULL}, /* OZO8008 - Zoom (33.6k Modem) */ 498 {0x0f804f3f, NULL}, /* OZO800f - Zoom 2812 (56k Modem) */ 499 {0x39804f3f, NULL}, /* OZO8039 - Zoom 56k flex */ 500 {0x00914f3f, NULL}, /* OZO9100 - Zoom 2919 (K56 Faxmodem) */ 501 {0x3024a341, NULL}, /* PMC2430 - Pace 56 Voice Internal Modem */ 502 {0x1000eb49, NULL}, /* ROK0010 - Rockwell ? */ 503 {0x1200b23d, NULL}, /* RSS0012 - OMRON ME5614ISA */ 504 {0x5002734a, NULL}, /* RSS0250 - 5614Jx3(G) Internal Modem */ 505 {0x6202734a, NULL}, /* RSS0262 - 5614Jx3[G] V90+K56Flex Modem */ 506 {0x1010104d, NULL}, /* SHP1010 - Rockwell 33600bps Modem */ 507 {0xc100ad4d, NULL}, /* SMM00C1 - Leopard 56k PnP */ 508 {0x9012b04e, NULL}, /* SUP1290 - Supra ? */ 509 {0x1013b04e, NULL}, /* SUP1310 - SupraExpress 336i PnP */ 510 {0x8013b04e, NULL}, /* SUP1380 - SupraExpress 288i PnP Voice */ 511 {0x8113b04e, NULL}, /* SUP1381 - SupraExpress 336i PnP Voice */ 512 {0x5016b04e, NULL}, /* SUP1650 - Supra 336i Sp Intl */ 513 {0x7016b04e, NULL}, /* SUP1670 - Supra 336i V+ Intl */ 514 {0x7420b04e, NULL}, /* SUP2070 - Supra ? */ 515 {0x8020b04e, NULL}, /* SUP2080 - Supra ? */ 516 {0x8420b04e, NULL}, /* SUP2084 - SupraExpress 56i PnP */ 517 {0x7121b04e, NULL}, /* SUP2171 - SupraExpress 56i Sp? */ 518 {0x8024b04e, NULL}, /* SUP2480 - Supra ? */ 519 {0x01007256, NULL}, /* USR0001 - U.S. Robotics Inc., Sportster W */ 520 {0x02007256, NULL}, /* USR0002 - U.S. Robotics Inc. Sportster 33. */ 521 {0x04007256, NULL}, /* USR0004 - USR Sportster 14.4k */ 522 {0x06007256, NULL}, /* USR0006 - USR Sportster 33.6k */ 523 {0x11007256, NULL}, /* USR0011 - USR ? */ 524 {0x01017256, NULL}, /* USR0101 - USR ? */ 525 {0x30207256, NULL}, /* USR2030 - U.S.Robotics Inc. Sportster 560 */ 526 {0x50207256, NULL}, /* USR2050 - U.S.Robotics Inc. Sportster 33. */ 527 {0x70207256, NULL}, /* USR2070 - U.S.Robotics Inc. Sportster 560 */ 528 {0x30307256, NULL}, /* USR3030 - U.S. Robotics 56K FAX INT */ 529 {0x31307256, NULL}, /* USR3031 - U.S. Robotics 56K FAX INT */ 530 {0x50307256, NULL}, /* USR3050 - U.S. Robotics 56K FAX INT */ 531 {0x70307256, NULL}, /* USR3070 - U.S. Robotics 56K Voice INT */ 532 {0x90307256, NULL}, /* USR3090 - USR ? */ 533 {0x70917256, NULL}, /* USR9170 - U.S. Robotics 56K FAX INT */ 534 {0x90917256, NULL}, /* USR9190 - USR 56k Voice INT */ 535 {0x0300695c, NULL}, /* WCI0003 - Fax/Voice/Modem/Speakphone/Asvd */ 536 {0x01a0896a, NULL}, /* ZTIA001 - Zoom Internal V90 Faxmodem */ 537 {0x61f7896a, NULL}, /* ZTIF761 - Zoom ComStar 33.6 */ 538 {0} 539 }; 540 541 542 543 static int 544 sio_isa_probe(device_t dev) 545 { 546 /* Check isapnp ids */ 547 if (ISA_PNP_PROBE(device_get_parent(dev), dev, sio_ids) == ENXIO) 548 return (ENXIO); 549 return (sioprobe(dev, 0, 0UL)); 550 } 551 552 int 553 sioprobe(device_t dev, int xrid, u_long rclk) 554 { 555 #if 0 556 static bool_t already_init; 557 device_t xdev; 558 #endif 559 struct com_s *com; 560 u_int divisor; 561 bool_t failures[10]; 562 int fn; 563 device_t idev; 564 Port_t iobase; 565 intrmask_t irqmap[4]; 566 intrmask_t irqs; 567 u_char mcr_image; 568 int result; 569 u_long xirq; 570 u_int flags = device_get_flags(dev); 571 int rid; 572 struct resource *port; 573 574 rid = xrid; 575 port = bus_alloc_resource(dev, SYS_RES_IOPORT, &rid, 576 0, ~0, IO_COMSIZE, RF_ACTIVE); 577 if (!port) 578 return (ENXIO); 579 580 lwkt_gettoken(&tty_token); 581 com = device_get_softc(dev); 582 com->bst = rman_get_bustag(port); 583 com->bsh = rman_get_bushandle(port); 584 if (rclk == 0) 585 rclk = DEFAULT_RCLK; 586 com->rclk = rclk; 587 588 #if 0 589 /* 590 * XXX this is broken - when we are first called, there are no 591 * previously configured IO ports. We could hard code 592 * 0x3f8, 0x2f8, 0x3e8, 0x2e8 etc but that's probably worse. 593 * This code has been doing nothing since the conversion since 594 * "count" is zero the first time around. 595 */ 596 if (!already_init) { 597 /* 598 * Turn off MCR_IENABLE for all likely serial ports. An unused 599 * port with its MCR_IENABLE gate open will inhibit interrupts 600 * from any used port that shares the interrupt vector. 601 * XXX the gate enable is elsewhere for some multiports. 602 */ 603 device_t *devs; 604 int count, i, xioport; 605 606 devclass_get_devices(sio_devclass, &devs, &count); 607 for (i = 0; i < count; i++) { 608 xdev = devs[i]; 609 if (device_is_enabled(xdev) && 610 bus_get_resource(xdev, SYS_RES_IOPORT, 0, &xioport, 611 NULL) == 0) 612 outb(xioport + com_mcr, 0); 613 } 614 kfree(devs, M_TEMP); 615 already_init = TRUE; 616 } 617 #endif 618 619 if (COM_LLCONSOLE(flags)) { 620 kprintf("sio%d: reserved for low-level i/o\n", 621 device_get_unit(dev)); 622 bus_release_resource(dev, SYS_RES_IOPORT, rid, port); 623 lwkt_reltoken(&tty_token); 624 return (ENXIO); 625 } 626 627 /* 628 * If the device is on a multiport card and has an AST/4 629 * compatible interrupt control register, initialize this 630 * register and prepare to leave MCR_IENABLE clear in the mcr. 631 * Otherwise, prepare to set MCR_IENABLE in the mcr. 632 * Point idev to the device struct giving the correct id_irq. 633 * This is the struct for the master device if there is one. 634 */ 635 idev = dev; 636 mcr_image = MCR_IENABLE; 637 #ifdef COM_MULTIPORT 638 if (COM_ISMULTIPORT(flags)) { 639 Port_t xiobase; 640 u_long io; 641 642 idev = devclass_get_device(sio_devclass, COM_MPMASTER(flags)); 643 if (idev == NULL) { 644 kprintf("sio%d: master device %d not configured\n", 645 device_get_unit(dev), COM_MPMASTER(flags)); 646 idev = dev; 647 } 648 if (!COM_NOTAST4(flags)) { 649 if (bus_get_resource(idev, SYS_RES_IOPORT, 0, &io, 650 NULL) == 0) { 651 xiobase = io; 652 if (bus_get_resource(idev, SYS_RES_IRQ, 0, 653 NULL, NULL) == 0) 654 outb(xiobase + com_scr, 0x80); 655 else 656 outb(xiobase + com_scr, 0); 657 } 658 mcr_image = 0; 659 } 660 } 661 #endif /* COM_MULTIPORT */ 662 if (bus_get_resource(idev, SYS_RES_IRQ, 0, NULL, NULL) != 0) 663 mcr_image = 0; 664 665 bzero(failures, sizeof failures); 666 iobase = rman_get_start(port); 667 668 /* 669 * We don't want to get actual interrupts, just masked ones. 670 * Interrupts from this line should already be masked in the ICU, 671 * but mask them in the processor as well in case there are some 672 * (misconfigured) shared interrupts. 673 */ 674 com_lock(); 675 /* EXTRA DELAY? */ 676 677 /* 678 * For the TI16754 chips, set prescaler to 1 (4 is often the 679 * default after-reset value) as otherwise it's impossible to 680 * get highest baudrates. 681 */ 682 if (COM_TI16754(flags)) { 683 u_char cfcr, efr; 684 685 cfcr = sio_getreg(com, com_cfcr); 686 sio_setreg(com, com_cfcr, CFCR_EFR_ENABLE); 687 efr = sio_getreg(com, com_efr); 688 /* Unlock extended features to turn off prescaler. */ 689 sio_setreg(com, com_efr, efr | EFR_EFE); 690 /* Disable EFR. */ 691 sio_setreg(com, com_cfcr, (cfcr != CFCR_EFR_ENABLE) ? cfcr : 0); 692 /* Turn off prescaler. */ 693 sio_setreg(com, com_mcr, 694 sio_getreg(com, com_mcr) & ~MCR_PRESCALE); 695 sio_setreg(com, com_cfcr, CFCR_EFR_ENABLE); 696 sio_setreg(com, com_efr, efr); 697 sio_setreg(com, com_cfcr, cfcr); 698 } 699 700 /* 701 * Initialize the speed and the word size and wait long enough to 702 * drain the maximum of 16 bytes of junk in device output queues. 703 * The speed is undefined after a master reset and must be set 704 * before relying on anything related to output. There may be 705 * junk after a (very fast) soft reboot and (apparently) after 706 * master reset. 707 * XXX what about the UART bug avoided by waiting in comparam()? 708 * We don't want to to wait long enough to drain at 2 bps. 709 */ 710 if (iobase == siocniobase) { 711 DELAY((16 + 1) * 1000000 / (comdefaultrate / 10)); 712 } else { 713 sio_setreg(com, com_cfcr, CFCR_DLAB | CFCR_8BITS); 714 divisor = siodivisor(rclk, SIO_TEST_SPEED); 715 sio_setreg(com, com_dlbl, divisor & 0xff); 716 sio_setreg(com, com_dlbh, divisor >> 8); 717 sio_setreg(com, com_cfcr, CFCR_8BITS); 718 DELAY((16 + 1) * 1000000 / (SIO_TEST_SPEED / 10)); 719 } 720 721 /* 722 * Make sure we can drain the receiver. If we can't, the serial 723 * port may not exist. 724 */ 725 for (fn = 0; fn < 256; ++fn) { 726 if ((sio_getreg(com, com_lsr) & LSR_RXRDY) == 0) 727 break; 728 (void)sio_getreg(com, com_data); 729 } 730 if (fn == 256) { 731 com_unlock(); 732 lwkt_reltoken(&tty_token); 733 kprintf("sio%d: can't drain, serial port might " 734 "not exist, disabling\n", device_get_unit(dev)); 735 return (ENXIO); 736 } 737 738 /* 739 * Enable the interrupt gate and disable device interupts. This 740 * should leave the device driving the interrupt line low and 741 * guarantee an edge trigger if an interrupt can be generated. 742 */ 743 /* EXTRA DELAY? */ 744 sio_setreg(com, com_mcr, mcr_image); 745 sio_setreg(com, com_ier, 0); 746 DELAY(1000); /* XXX */ 747 irqmap[0] = isa_irq_pending(); 748 749 /* 750 * Attempt to set loopback mode so that we can send a null byte 751 * without annoying any external device. 752 */ 753 /* EXTRA DELAY? */ 754 sio_setreg(com, com_mcr, mcr_image | MCR_LOOPBACK); 755 756 /* 757 * Attempt to generate an output interrupt. On 8250's, setting 758 * IER_ETXRDY generates an interrupt independent of the current 759 * setting and independent of whether the THR is empty. On 16450's, 760 * setting IER_ETXRDY generates an interrupt independent of the 761 * current setting. On 16550A's, setting IER_ETXRDY only 762 * generates an interrupt when IER_ETXRDY is not already set. 763 */ 764 sio_setreg(com, com_ier, IER_ETXRDY); 765 766 /* 767 * On some 16x50 incompatibles, setting IER_ETXRDY doesn't generate 768 * an interrupt. They'd better generate one for actually doing 769 * output. Loopback may be broken on the same incompatibles but 770 * it's unlikely to do more than allow the null byte out. 771 */ 772 sio_setreg(com, com_data, 0); 773 DELAY((1 + 2) * 1000000 / (SIO_TEST_SPEED / 10)); 774 775 /* 776 * Turn off loopback mode so that the interrupt gate works again 777 * (MCR_IENABLE was hidden). This should leave the device driving 778 * an interrupt line high. It doesn't matter if the interrupt 779 * line oscillates while we are not looking at it, since interrupts 780 * are disabled. 781 */ 782 /* EXTRA DELAY? */ 783 sio_setreg(com, com_mcr, mcr_image); 784 785 /* 786 * Some pcmcia cards have the "TXRDY bug", so we check everyone 787 * for IIR_TXRDY implementation ( Palido 321s, DC-1S... ) 788 */ 789 if (COM_NOPROBE(flags)) { 790 /* Reading IIR register twice */ 791 for (fn = 0; fn < 2; fn ++) { 792 DELAY(10000); 793 failures[6] = sio_getreg(com, com_iir); 794 } 795 /* Check IIR_TXRDY clear ? */ 796 result = 0; 797 if (failures[6] & IIR_TXRDY) { 798 /* Nop, Double check with clearing IER */ 799 sio_setreg(com, com_ier, 0); 800 if (sio_getreg(com, com_iir) & IIR_NOPEND) { 801 /* Ok. we're familia this gang */ 802 SET_FLAG(dev, COM_C_IIR_TXRDYBUG); 803 } else { 804 /* Unknown, Just omit this chip.. XXX */ 805 result = ENXIO; 806 sio_setreg(com, com_mcr, 0); 807 } 808 } else { 809 /* OK. this is well-known guys */ 810 CLR_FLAG(dev, COM_C_IIR_TXRDYBUG); 811 } 812 sio_setreg(com, com_ier, 0); 813 sio_setreg(com, com_cfcr, CFCR_8BITS); 814 com_unlock(); 815 bus_release_resource(dev, SYS_RES_IOPORT, rid, port); 816 lwkt_reltoken(&tty_token); 817 return (iobase == siocniobase ? 0 : result); 818 } 819 820 /* 821 * Check that 822 * o the CFCR, IER and MCR in UART hold the values written to them 823 * (the values happen to be all distinct - this is good for 824 * avoiding false positive tests from bus echoes). 825 * o an output interrupt is generated and its vector is correct. 826 * o the interrupt goes away when the IIR in the UART is read. 827 */ 828 /* EXTRA DELAY? */ 829 failures[0] = sio_getreg(com, com_cfcr) - CFCR_8BITS; 830 failures[1] = sio_getreg(com, com_ier) - IER_ETXRDY; 831 failures[2] = sio_getreg(com, com_mcr) - mcr_image; 832 DELAY(10000); /* Some internal modems need this time */ 833 irqmap[1] = isa_irq_pending(); 834 failures[4] = (sio_getreg(com, com_iir) & IIR_IMASK) - IIR_TXRDY; 835 DELAY(1000); /* XXX */ 836 irqmap[2] = isa_irq_pending(); 837 failures[6] = (sio_getreg(com, com_iir) & IIR_IMASK) - IIR_NOPEND; 838 839 /* 840 * Turn off all device interrupts and check that they go off properly. 841 * Leave MCR_IENABLE alone. For ports without a master port, it gates 842 * the OUT2 output of the UART to 843 * the ICU input. Closing the gate would give a floating ICU input 844 * (unless there is another device driving it) and spurious interrupts. 845 * (On the system that this was first tested on, the input floats high 846 * and gives a (masked) interrupt as soon as the gate is closed.) 847 */ 848 sio_setreg(com, com_ier, 0); 849 sio_setreg(com, com_cfcr, CFCR_8BITS); /* dummy to avoid bus echo */ 850 failures[7] = sio_getreg(com, com_ier); 851 DELAY(1000); /* XXX */ 852 irqmap[3] = isa_irq_pending(); 853 failures[9] = (sio_getreg(com, com_iir) & IIR_IMASK) - IIR_NOPEND; 854 855 com_unlock(); 856 857 irqs = irqmap[1] & ~irqmap[0]; 858 if (bus_get_resource(idev, SYS_RES_IRQ, 0, &xirq, NULL) == 0 && 859 ((1 << xirq) & irqs) == 0) 860 kprintf( 861 "sio%d: configured irq %ld not in bitmap of probed irqs %#x\n", 862 device_get_unit(dev), xirq, irqs); 863 if (bootverbose) 864 kprintf("sio%d: irq maps: %#x %#x %#x %#x\n", 865 device_get_unit(dev), 866 irqmap[0], irqmap[1], irqmap[2], irqmap[3]); 867 868 result = 0; 869 for (fn = 0; fn < sizeof failures; ++fn) 870 if (failures[fn]) { 871 sio_setreg(com, com_mcr, 0); 872 result = ENXIO; 873 if (bootverbose) { 874 kprintf("sio%d: probe failed test(s):", 875 device_get_unit(dev)); 876 for (fn = 0; fn < sizeof failures; ++fn) 877 if (failures[fn]) 878 kprintf(" %d", fn); 879 kprintf("\n"); 880 } 881 break; 882 } 883 bus_release_resource(dev, SYS_RES_IOPORT, rid, port); 884 lwkt_reltoken(&tty_token); 885 return (iobase == siocniobase ? 0 : result); 886 } 887 888 #ifdef COM_ESP 889 static int 890 espattach(struct com_s *com, Port_t esp_port) 891 { 892 u_char dips; 893 u_char val; 894 895 /* 896 * Check the ESP-specific I/O port to see if we're an ESP 897 * card. If not, return failure immediately. 898 */ 899 if ((inb(esp_port) & 0xf3) == 0) { 900 kprintf(" port 0x%x is not an ESP board?\n", esp_port); 901 return (0); 902 } 903 904 lwkt_gettoken(&tty_token); 905 /* 906 * We've got something that claims to be a Hayes ESP card. 907 * Let's hope so. 908 */ 909 910 /* Get the dip-switch configuration */ 911 outb(esp_port + ESP_CMD1, ESP_GETDIPS); 912 dips = inb(esp_port + ESP_STATUS1); 913 914 /* 915 * Bits 0,1 of dips say which COM port we are. 916 */ 917 if (rman_get_start(com->ioportres) == likely_com_ports[dips & 0x03]) 918 kprintf(" : ESP"); 919 else { 920 kprintf(" esp_port has com %d\n", dips & 0x03); 921 lwkt_reltoken(&tty_token); 922 return (0); 923 } 924 925 /* 926 * Check for ESP version 2.0 or later: bits 4,5,6 = 010. 927 */ 928 outb(esp_port + ESP_CMD1, ESP_GETTEST); 929 val = inb(esp_port + ESP_STATUS1); /* clear reg 1 */ 930 val = inb(esp_port + ESP_STATUS2); 931 if ((val & 0x70) < 0x20) { 932 kprintf("-old (%o)", val & 0x70); 933 lwkt_reltoken(&tty_token); 934 return (0); 935 } 936 937 /* 938 * Check for ability to emulate 16550: bit 7 == 1 939 */ 940 if ((dips & 0x80) == 0) { 941 kprintf(" slave"); 942 lwkt_reltoken(&tty_token); 943 return (0); 944 } 945 946 /* 947 * Okay, we seem to be a Hayes ESP card. Whee. 948 */ 949 com->esp = TRUE; 950 com->esp_port = esp_port; 951 lwkt_reltoken(&tty_token); 952 return (1); 953 } 954 #endif /* COM_ESP */ 955 956 static int 957 sio_isa_attach(device_t dev) 958 { 959 return (sioattach(dev, 0, 0UL)); 960 } 961 962 int 963 sioattach(device_t dev, int xrid, u_long rclk) 964 { 965 struct com_s *com; 966 #ifdef COM_ESP 967 Port_t *espp; 968 #endif 969 Port_t iobase; 970 int minorbase; 971 int unit; 972 u_int flags; 973 int rid; 974 struct resource *port; 975 int ret; 976 static int did_init; 977 978 lwkt_gettoken(&tty_token); 979 if (did_init == 0) { 980 did_init = 1; 981 callout_init_mp(&sio_timeout_handle); 982 } 983 984 rid = xrid; 985 port = bus_alloc_resource(dev, SYS_RES_IOPORT, &rid, 986 0, ~0, IO_COMSIZE, RF_ACTIVE); 987 if (!port) { 988 lwkt_reltoken(&tty_token); 989 return (ENXIO); 990 } 991 992 iobase = rman_get_start(port); 993 unit = device_get_unit(dev); 994 com = device_get_softc(dev); 995 flags = device_get_flags(dev); 996 997 if (unit >= sio_numunits) 998 sio_numunits = unit + 1; 999 /* 1000 * sioprobe() has initialized the device registers as follows: 1001 * o cfcr = CFCR_8BITS. 1002 * It is most important that CFCR_DLAB is off, so that the 1003 * data port is not hidden when we enable interrupts. 1004 * o ier = 0. 1005 * Interrupts are only enabled when the line is open. 1006 * o mcr = MCR_IENABLE, or 0 if the port has AST/4 compatible 1007 * interrupt control register or the config specifies no irq. 1008 * Keeping MCR_DTR and MCR_RTS off might stop the external 1009 * device from sending before we are ready. 1010 */ 1011 bzero(com, sizeof *com); 1012 com->unit = unit; 1013 com->ioportres = port; 1014 com->bst = rman_get_bustag(port); 1015 com->bsh = rman_get_bushandle(port); 1016 com->cfcr_image = CFCR_8BITS; 1017 com->dtr_wait = 3 * hz; 1018 callout_init_mp(&com->dtr_ch); 1019 callout_init_mp(&com->busy_ch); 1020 com->loses_outints = COM_LOSESOUTINTS(flags) != 0; 1021 com->no_irq = bus_get_resource(dev, SYS_RES_IRQ, 0, NULL, NULL) != 0; 1022 com->tx_fifo_size = 1; 1023 com->obufs[0].l_head = com->obuf1; 1024 com->obufs[1].l_head = com->obuf2; 1025 1026 com->data_port = iobase + com_data; 1027 com->int_id_port = iobase + com_iir; 1028 com->modem_ctl_port = iobase + com_mcr; 1029 com->mcr_image = inb(com->modem_ctl_port); 1030 com->line_status_port = iobase + com_lsr; 1031 com->modem_status_port = iobase + com_msr; 1032 com->intr_ctl_port = iobase + com_ier; 1033 1034 if (rclk == 0) 1035 rclk = DEFAULT_RCLK; 1036 com->rclk = rclk; 1037 1038 /* 1039 * We don't use all the flags from <sys/ttydefaults.h> since they 1040 * are only relevant for logins. It's important to have echo off 1041 * initially so that the line doesn't start blathering before the 1042 * echo flag can be turned off. 1043 */ 1044 com->it_in.c_iflag = 0; 1045 com->it_in.c_oflag = 0; 1046 com->it_in.c_cflag = TTYDEF_CFLAG; 1047 com->it_in.c_lflag = 0; 1048 if (unit == comconsole) { 1049 com->it_in.c_iflag = TTYDEF_IFLAG; 1050 com->it_in.c_oflag = TTYDEF_OFLAG; 1051 com->it_in.c_cflag = TTYDEF_CFLAG | CLOCAL; 1052 com->it_in.c_lflag = TTYDEF_LFLAG; 1053 com->lt_out.c_cflag = com->lt_in.c_cflag = CLOCAL; 1054 com->lt_out.c_ispeed = com->lt_out.c_ospeed = 1055 com->lt_in.c_ispeed = com->lt_in.c_ospeed = 1056 com->it_in.c_ispeed = com->it_in.c_ospeed = comdefaultrate; 1057 } else 1058 com->it_in.c_ispeed = com->it_in.c_ospeed = TTYDEF_SPEED; 1059 if (siosetwater(com, com->it_in.c_ispeed) != 0) { 1060 /* 1061 * Leave i/o resources allocated if this is a `cn'-level 1062 * console, so that other devices can't snarf them. 1063 */ 1064 if (iobase != siocniobase) 1065 bus_release_resource(dev, SYS_RES_IOPORT, rid, port); 1066 lwkt_reltoken(&tty_token); 1067 return (ENOMEM); 1068 } 1069 termioschars(&com->it_in); 1070 com->it_out = com->it_in; 1071 1072 /* attempt to determine UART type */ 1073 kprintf("sio%d: type", unit); 1074 1075 1076 #ifdef COM_MULTIPORT 1077 if (!COM_ISMULTIPORT(flags) && !COM_IIR_TXRDYBUG(flags)) 1078 #else 1079 if (!COM_IIR_TXRDYBUG(flags)) 1080 #endif 1081 { 1082 u_char scr; 1083 u_char scr1; 1084 u_char scr2; 1085 1086 scr = sio_getreg(com, com_scr); 1087 sio_setreg(com, com_scr, 0xa5); 1088 scr1 = sio_getreg(com, com_scr); 1089 sio_setreg(com, com_scr, 0x5a); 1090 scr2 = sio_getreg(com, com_scr); 1091 sio_setreg(com, com_scr, scr); 1092 if (scr1 != 0xa5 || scr2 != 0x5a) { 1093 kprintf(" 8250"); 1094 goto determined_type; 1095 } 1096 } 1097 sio_setreg(com, com_fifo, FIFO_ENABLE | FIFO_RX_HIGH); 1098 DELAY(100); 1099 com->st16650a = 0; 1100 switch (inb(com->int_id_port) & IIR_FIFO_MASK) { 1101 case FIFO_RX_LOW: 1102 kprintf(" 16450"); 1103 break; 1104 case FIFO_RX_MEDL: 1105 kprintf(" 16450?"); 1106 break; 1107 case FIFO_RX_MEDH: 1108 kprintf(" 16550?"); 1109 break; 1110 case FIFO_RX_HIGH: 1111 if (COM_NOFIFO(flags)) { 1112 kprintf(" 16550A fifo disabled"); 1113 } else { 1114 com->hasfifo = TRUE; 1115 if (COM_ST16650A(flags)) { 1116 com->st16650a = 1; 1117 com->tx_fifo_size = 32; 1118 kprintf(" ST16650A"); 1119 } else if (COM_TI16754(flags)) { 1120 com->tx_fifo_size = 64; 1121 kprintf(" TI16754"); 1122 } else { 1123 com->tx_fifo_size = COM_FIFOSIZE(flags); 1124 kprintf(" 16550A"); 1125 } 1126 } 1127 #ifdef COM_ESP 1128 for (espp = likely_esp_ports; *espp != 0; espp++) 1129 if (espattach(com, *espp)) { 1130 com->tx_fifo_size = 1024; 1131 break; 1132 } 1133 #endif 1134 if (!com->st16650a && !COM_TI16754(flags)) { 1135 if (!com->tx_fifo_size) 1136 com->tx_fifo_size = 16; 1137 else 1138 kprintf(" lookalike with %d bytes FIFO", 1139 com->tx_fifo_size); 1140 } 1141 1142 break; 1143 } 1144 1145 #ifdef COM_ESP 1146 if (com->esp) { 1147 /* 1148 * Set 16550 compatibility mode. 1149 * We don't use the ESP_MODE_SCALE bit to increase the 1150 * fifo trigger levels because we can't handle large 1151 * bursts of input. 1152 * XXX flow control should be set in comparam(), not here. 1153 */ 1154 outb(com->esp_port + ESP_CMD1, ESP_SETMODE); 1155 outb(com->esp_port + ESP_CMD2, ESP_MODE_RTS | ESP_MODE_FIFO); 1156 1157 /* Set RTS/CTS flow control. */ 1158 outb(com->esp_port + ESP_CMD1, ESP_SETFLOWTYPE); 1159 outb(com->esp_port + ESP_CMD2, ESP_FLOW_RTS); 1160 outb(com->esp_port + ESP_CMD2, ESP_FLOW_CTS); 1161 1162 /* Set flow-control levels. */ 1163 outb(com->esp_port + ESP_CMD1, ESP_SETRXFLOW); 1164 outb(com->esp_port + ESP_CMD2, HIBYTE(768)); 1165 outb(com->esp_port + ESP_CMD2, LOBYTE(768)); 1166 outb(com->esp_port + ESP_CMD2, HIBYTE(512)); 1167 outb(com->esp_port + ESP_CMD2, LOBYTE(512)); 1168 } 1169 #endif /* COM_ESP */ 1170 sio_setreg(com, com_fifo, 0); 1171 determined_type: ; 1172 1173 #ifdef COM_MULTIPORT 1174 if (COM_ISMULTIPORT(flags)) { 1175 device_t masterdev; 1176 1177 com->multiport = TRUE; 1178 kprintf(" (multiport"); 1179 if (unit == COM_MPMASTER(flags)) 1180 kprintf(" master"); 1181 kprintf(")"); 1182 masterdev = devclass_get_device(sio_devclass, 1183 COM_MPMASTER(flags)); 1184 com->no_irq = (masterdev == NULL || bus_get_resource(masterdev, 1185 SYS_RES_IRQ, 0, NULL, NULL) != 0); 1186 } 1187 #endif /* COM_MULTIPORT */ 1188 if (unit == comconsole) 1189 kprintf(", console"); 1190 if (COM_IIR_TXRDYBUG(flags)) 1191 kprintf(" with a bogus IIR_TXRDY register"); 1192 kprintf("\n"); 1193 1194 if (!sio_registered) { 1195 register_swi(SWI_TTY, siopoll, NULL ,"swi_siopoll", NULL, -1); 1196 sio_registered = TRUE; 1197 } 1198 minorbase = UNIT_TO_MINOR(unit); 1199 make_dev(&sio_ops, minorbase, 1200 UID_ROOT, GID_WHEEL, 0600, "ttyd%r", unit); 1201 make_dev(&sio_ops, minorbase | CONTROL_INIT_STATE, 1202 UID_ROOT, GID_WHEEL, 0600, "ttyid%r", unit); 1203 make_dev(&sio_ops, minorbase | CONTROL_LOCK_STATE, 1204 UID_ROOT, GID_WHEEL, 0600, "ttyld%r", unit); 1205 make_dev(&sio_ops, minorbase | CALLOUT_MASK, 1206 UID_UUCP, GID_DIALER, 0660, "cuaa%r", unit); 1207 make_dev(&sio_ops, minorbase | CALLOUT_MASK | CONTROL_INIT_STATE, 1208 UID_UUCP, GID_DIALER, 0660, "cuaia%r", unit); 1209 make_dev(&sio_ops, minorbase | CALLOUT_MASK | CONTROL_LOCK_STATE, 1210 UID_UUCP, GID_DIALER, 0660, "cuala%r", unit); 1211 com->flags = flags; 1212 com->pps.ppscap = PPS_CAPTUREASSERT | PPS_CAPTURECLEAR; 1213 pps_init(&com->pps); 1214 1215 rid = 0; 1216 com->irqres = bus_alloc_resource(dev, SYS_RES_IRQ, &rid, 0ul, ~0ul, 1, 1217 RF_ACTIVE); 1218 if (com->irqres) { 1219 ret = BUS_SETUP_INTR(device_get_parent(dev), dev, 1220 com->irqres, INTR_MPSAFE, siointr, com, 1221 &com->cookie, NULL, NULL); 1222 if (ret) 1223 device_printf(dev, "could not activate interrupt\n"); 1224 #if defined(DDB) 1225 /* 1226 * Enable interrupts for early break-to-debugger support 1227 * on the console. 1228 */ 1229 if (ret == 0 && unit == comconsole && 1230 (break_to_debugger || alt_break_to_debugger)) { 1231 inb(siocniobase + com_data); 1232 outb(siocniobase + com_ier, 1233 IER_ERXRDY | IER_ERLS | IER_EMSC); 1234 } 1235 #endif 1236 } 1237 1238 lwkt_reltoken(&tty_token); 1239 return (0); 1240 } 1241 1242 static int 1243 sioopen(struct dev_open_args *ap) 1244 { 1245 cdev_t dev = ap->a_head.a_dev; 1246 struct com_s *com; 1247 int error; 1248 int mynor; 1249 struct tty *tp; 1250 int unit; 1251 1252 mynor = minor(dev); 1253 unit = MINOR_TO_UNIT(mynor); 1254 com = com_addr(unit); 1255 if (com == NULL) 1256 return (ENXIO); 1257 if (com->gone) 1258 return (ENXIO); 1259 if (mynor & CONTROL_MASK) 1260 return (0); 1261 lwkt_gettoken(&tty_token); 1262 tp = dev->si_tty = com->tp = ttymalloc(com->tp); 1263 crit_enter(); 1264 /* 1265 * We jump to this label after all non-interrupted sleeps to pick 1266 * up any changes of the device state. 1267 */ 1268 open_top: 1269 while (com->state & CS_DTR_OFF) { 1270 error = tsleep(&com->dtr_wait, PCATCH, "siodtr", 0); 1271 if (com_addr(unit) == NULL) { 1272 crit_exit(); 1273 lwkt_reltoken(&tty_token); 1274 return (ENXIO); 1275 } 1276 if (error != 0 || com->gone) 1277 goto out; 1278 } 1279 if (tp->t_state & TS_ISOPEN) { 1280 /* 1281 * The device is open, so everything has been initialized. 1282 * Handle conflicts. 1283 */ 1284 if (mynor & CALLOUT_MASK) { 1285 if (!com->active_out) { 1286 error = EBUSY; 1287 goto out; 1288 } 1289 } else { 1290 if (com->active_out) { 1291 if (ap->a_oflags & O_NONBLOCK) { 1292 error = EBUSY; 1293 goto out; 1294 } 1295 error = tsleep(&com->active_out, 1296 PCATCH, "siobi", 0); 1297 if (com_addr(unit) == NULL) { 1298 crit_exit(); 1299 lwkt_reltoken(&tty_token); 1300 return (ENXIO); 1301 } 1302 if (error != 0 || com->gone) 1303 goto out; 1304 goto open_top; 1305 } 1306 } 1307 if (tp->t_state & TS_XCLUDE && priv_check_cred(ap->a_cred, PRIV_ROOT, 0)) { 1308 error = EBUSY; 1309 goto out; 1310 } 1311 } else { 1312 /* 1313 * The device isn't open, so there are no conflicts. 1314 * Initialize it. Initialization is done twice in many 1315 * cases: to preempt sleeping callin opens if we are 1316 * callout, and to complete a callin open after DCD rises. 1317 */ 1318 tp->t_oproc = comstart; 1319 tp->t_param = comparam; 1320 tp->t_stop = comstop; 1321 tp->t_dev = dev; 1322 tp->t_termios = mynor & CALLOUT_MASK 1323 ? com->it_out : com->it_in; 1324 (void)commctl(com, TIOCM_DTR | TIOCM_RTS, DMSET); 1325 com->poll = com->no_irq; 1326 com->poll_output = com->loses_outints; 1327 ++com->wopeners; 1328 error = comparam(tp, &tp->t_termios); 1329 --com->wopeners; 1330 if (error != 0) 1331 goto out; 1332 /* 1333 * XXX we should goto open_top if comparam() slept. 1334 */ 1335 if (com->hasfifo) { 1336 /* 1337 * (Re)enable and drain fifos. 1338 * 1339 * Certain SMC chips cause problems if the fifos 1340 * are enabled while input is ready. Turn off the 1341 * fifo if necessary to clear the input. We test 1342 * the input ready bit after enabling the fifos 1343 * since we've already enabled them in comparam() 1344 * and to handle races between enabling and fresh 1345 * input. 1346 */ 1347 while (TRUE) { 1348 sio_setreg(com, com_fifo, 1349 FIFO_RCV_RST | FIFO_XMT_RST 1350 | com->fifo_image); 1351 /* 1352 * XXX the delays are for superstitious 1353 * historical reasons. It must be less than 1354 * the character time at the maximum 1355 * supported speed (87 usec at 115200 bps 1356 * 8N1). Otherwise we might loop endlessly 1357 * if data is streaming in. We used to use 1358 * delays of 100. That usually worked 1359 * because DELAY(100) used to usually delay 1360 * for about 85 usec instead of 100. 1361 */ 1362 DELAY(50); 1363 if (!(inb(com->line_status_port) & LSR_RXRDY)) 1364 break; 1365 sio_setreg(com, com_fifo, 0); 1366 DELAY(50); 1367 (void) inb(com->data_port); 1368 } 1369 } 1370 1371 com_lock(); 1372 (void) inb(com->line_status_port); 1373 (void) inb(com->data_port); 1374 com->prev_modem_status = com->last_modem_status 1375 = inb(com->modem_status_port); 1376 if (COM_IIR_TXRDYBUG(com->flags)) { 1377 outb(com->intr_ctl_port, IER_ERXRDY | IER_ERLS 1378 | IER_EMSC); 1379 } else { 1380 outb(com->intr_ctl_port, IER_ERXRDY | IER_ETXRDY 1381 | IER_ERLS | IER_EMSC); 1382 } 1383 com_unlock(); 1384 /* 1385 * Handle initial DCD. Callout devices get a fake initial 1386 * DCD (trapdoor DCD). If we are callout, then any sleeping 1387 * callin opens get woken up and resume sleeping on "siobi" 1388 * instead of "siodcd". 1389 */ 1390 /* 1391 * XXX `mynor & CALLOUT_MASK' should be 1392 * `tp->t_cflag & (SOFT_CARRIER | TRAPDOOR_CARRIER) where 1393 * TRAPDOOR_CARRIER is the default initial state for callout 1394 * devices and SOFT_CARRIER is like CLOCAL except it hides 1395 * the true carrier. 1396 */ 1397 if (com->prev_modem_status & MSR_DCD || mynor & CALLOUT_MASK) 1398 (*linesw[tp->t_line].l_modem)(tp, 1); 1399 } 1400 /* 1401 * Wait for DCD if necessary. 1402 */ 1403 if (!(tp->t_state & TS_CARR_ON) && !(mynor & CALLOUT_MASK) 1404 && !(tp->t_cflag & CLOCAL) && !(ap->a_oflags & O_NONBLOCK)) { 1405 ++com->wopeners; 1406 error = tsleep(TSA_CARR_ON(tp), PCATCH, "siodcd", 0); 1407 if (com_addr(unit) == NULL) { 1408 crit_exit(); 1409 lwkt_reltoken(&tty_token); 1410 return (ENXIO); 1411 } 1412 --com->wopeners; 1413 if (error != 0 || com->gone) 1414 goto out; 1415 goto open_top; 1416 } 1417 error = (*linesw[tp->t_line].l_open)(dev, tp); 1418 disc_optim(tp, &tp->t_termios, com); 1419 if (tp->t_state & TS_ISOPEN && mynor & CALLOUT_MASK) 1420 com->active_out = TRUE; 1421 siosettimeout(); 1422 out: 1423 crit_exit(); 1424 if (!(tp->t_state & TS_ISOPEN) && com->wopeners == 0) 1425 comhardclose(com); 1426 lwkt_reltoken(&tty_token); 1427 return (error); 1428 } 1429 1430 static int 1431 sioclose(struct dev_close_args *ap) 1432 { 1433 cdev_t dev = ap->a_head.a_dev; 1434 struct com_s *com; 1435 int mynor; 1436 struct tty *tp; 1437 1438 mynor = minor(dev); 1439 if (mynor & CONTROL_MASK) 1440 return (0); 1441 lwkt_gettoken(&tty_token); 1442 com = com_addr(MINOR_TO_UNIT(mynor)); 1443 if (com == NULL) { 1444 lwkt_reltoken(&tty_token); 1445 return (ENODEV); 1446 } 1447 tp = com->tp; 1448 crit_enter(); 1449 (*linesw[tp->t_line].l_close)(tp, ap->a_fflag); 1450 disc_optim(tp, &tp->t_termios, com); 1451 comstop(tp, FREAD | FWRITE); 1452 comhardclose(com); 1453 ttyclose(tp); 1454 siosettimeout(); 1455 crit_exit(); 1456 if (com->gone) { 1457 kprintf("sio%d: gone\n", com->unit); 1458 crit_enter(); 1459 if (com->ibuf != NULL) 1460 kfree(com->ibuf, M_DEVBUF); 1461 bzero(tp, sizeof *tp); 1462 crit_exit(); 1463 } 1464 lwkt_reltoken(&tty_token); 1465 return (0); 1466 } 1467 1468 static void 1469 comhardclose(struct com_s *com) 1470 { 1471 struct tty *tp; 1472 crit_enter(); 1473 lwkt_gettoken(&tty_token); 1474 com->poll = FALSE; 1475 com->poll_output = FALSE; 1476 com->do_timestamp = FALSE; 1477 com->do_dcd_timestamp = FALSE; 1478 com->pps.ppsparam.mode = 0; 1479 sio_setreg(com, com_cfcr, com->cfcr_image &= ~CFCR_SBREAK); 1480 tp = com->tp; 1481 1482 #if defined(DDB) 1483 /* 1484 * Leave interrupts enabled and don't clear DTR if this is the 1485 * console. This allows us to detect break-to-debugger events 1486 * while the console device is closed. 1487 */ 1488 if (com->unit != comconsole || 1489 (break_to_debugger == 0 && alt_break_to_debugger == 0)) 1490 #endif 1491 { 1492 sio_setreg(com, com_ier, 0); 1493 if (tp->t_cflag & HUPCL 1494 /* 1495 * XXX we will miss any carrier drop between here and the 1496 * next open. Perhaps we should watch DCD even when the 1497 * port is closed; it is not sufficient to check it at 1498 * the next open because it might go up and down while 1499 * we're not watching. 1500 */ 1501 || (!com->active_out 1502 && !(com->prev_modem_status & MSR_DCD) 1503 && !(com->it_in.c_cflag & CLOCAL)) 1504 || !(tp->t_state & TS_ISOPEN)) { 1505 (void)commctl(com, TIOCM_DTR, DMBIC); 1506 if (com->dtr_wait != 0 && !(com->state & CS_DTR_OFF)) { 1507 callout_reset(&com->dtr_ch, com->dtr_wait, 1508 siodtrwakeup, com); 1509 com->state |= CS_DTR_OFF; 1510 } 1511 } 1512 } 1513 if (com->hasfifo) { 1514 /* 1515 * Disable fifos so that they are off after controlled 1516 * reboots. Some BIOSes fail to detect 16550s when the 1517 * fifos are enabled. 1518 */ 1519 sio_setreg(com, com_fifo, 0); 1520 } 1521 com->active_out = FALSE; 1522 wakeup(&com->active_out); 1523 wakeup(TSA_CARR_ON(tp)); /* restart any wopeners */ 1524 lwkt_reltoken(&tty_token); 1525 crit_exit(); 1526 } 1527 1528 static int 1529 sioread(struct dev_read_args *ap) 1530 { 1531 cdev_t dev = ap->a_head.a_dev; 1532 int mynor, ret; 1533 struct com_s *com; 1534 1535 lwkt_gettoken(&tty_token); 1536 mynor = minor(dev); 1537 if (mynor & CONTROL_MASK) { 1538 lwkt_reltoken(&tty_token); 1539 return (ENODEV); 1540 } 1541 com = com_addr(MINOR_TO_UNIT(mynor)); 1542 if (com == NULL || com->gone) { 1543 lwkt_reltoken(&tty_token); 1544 return (ENODEV); 1545 } 1546 ret = ((*linesw[com->tp->t_line].l_read)(com->tp, ap->a_uio, ap->a_ioflag)); 1547 lwkt_reltoken(&tty_token); 1548 return ret; 1549 } 1550 1551 static int 1552 siowrite(struct dev_write_args *ap) 1553 { 1554 cdev_t dev = ap->a_head.a_dev; 1555 int mynor; 1556 struct com_s *com; 1557 int unit, ret; 1558 1559 lwkt_gettoken(&tty_token); 1560 mynor = minor(dev); 1561 if (mynor & CONTROL_MASK) { 1562 lwkt_reltoken(&tty_token); 1563 return (ENODEV); 1564 } 1565 1566 unit = MINOR_TO_UNIT(mynor); 1567 com = com_addr(unit); 1568 if (com == NULL || com->gone) { 1569 lwkt_reltoken(&tty_token); 1570 return (ENODEV); 1571 } 1572 /* 1573 * (XXX) We disallow virtual consoles if the physical console is 1574 * a serial port. This is in case there is a display attached that 1575 * is not the console. In that situation we don't need/want the X 1576 * server taking over the console. 1577 */ 1578 if (constty != NULL && unit == comconsole) 1579 constty = NULL; 1580 ret = ((*linesw[com->tp->t_line].l_write)(com->tp, ap->a_uio, ap->a_ioflag)); 1581 lwkt_reltoken(&tty_token); 1582 return ret; 1583 } 1584 1585 static void 1586 siobusycheck(void *chan) 1587 { 1588 struct com_s *com; 1589 1590 lwkt_gettoken(&tty_token); 1591 com = (struct com_s *)chan; 1592 1593 /* 1594 * Clear TS_BUSY if low-level output is complete. 1595 * spl locking is sufficient because siointr1() does not set CS_BUSY. 1596 * If siointr1() clears CS_BUSY after we look at it, then we'll get 1597 * called again. Reading the line status port outside of siointr1() 1598 * is safe because CS_BUSY is clear so there are no output interrupts 1599 * to lose. 1600 */ 1601 crit_enter(); 1602 if (com->state & CS_BUSY) 1603 com->extra_state &= ~CSE_BUSYCHECK; /* False alarm. */ 1604 else if ((inb(com->line_status_port) & (LSR_TSRE | LSR_TXRDY)) 1605 == (LSR_TSRE | LSR_TXRDY)) { 1606 com->tp->t_state &= ~TS_BUSY; 1607 ttwwakeup(com->tp); 1608 com->extra_state &= ~CSE_BUSYCHECK; 1609 } else { 1610 callout_reset(&com->busy_ch, hz / 100, siobusycheck, com); 1611 } 1612 crit_exit(); 1613 lwkt_reltoken(&tty_token); 1614 } 1615 1616 static u_int 1617 siodivisor(u_long rclk, speed_t speed) 1618 { 1619 long actual_speed; 1620 u_int divisor; 1621 int error; 1622 1623 if (speed == 0 || speed > ((speed_t)-1 - 1) / 8) 1624 return (0); 1625 divisor = (rclk / (8UL * speed) + 1) / 2; 1626 if (divisor == 0 || divisor >= 65536) 1627 return (0); 1628 actual_speed = rclk / (16UL * divisor); 1629 1630 /* 10 times error in percent: */ 1631 error = ((actual_speed - (long)speed) * 2000 / (long)speed + 1) / 2; 1632 1633 /* 3.0% maximum error tolerance: */ 1634 if (error < -30 || error > 30) 1635 return (0); 1636 1637 return (divisor); 1638 } 1639 1640 static void 1641 siodtrwakeup(void *chan) 1642 { 1643 struct com_s *com; 1644 1645 lwkt_gettoken(&tty_token); 1646 com = (struct com_s *)chan; 1647 com->state &= ~CS_DTR_OFF; 1648 wakeup(&com->dtr_wait); 1649 lwkt_reltoken(&tty_token); 1650 } 1651 1652 /* 1653 * NOTE: Normally called with tty_token held but might not be when 1654 * operating as the console. 1655 * 1656 * Must be called with com_lock 1657 */ 1658 static void 1659 sioinput(struct com_s *com) 1660 { 1661 u_char *buf; 1662 int incc; 1663 u_char line_status; 1664 int recv_data; 1665 struct tty *tp; 1666 1667 buf = com->ibuf; 1668 tp = com->tp; 1669 if (!(tp->t_state & TS_ISOPEN) || !(tp->t_cflag & CREAD)) { 1670 com_events -= (com->iptr - com->ibuf); 1671 com->iptr = com->ibuf; 1672 return; 1673 } 1674 if (tp->t_state & TS_CAN_BYPASS_L_RINT) { 1675 /* 1676 * Avoid the grotesquely inefficient lineswitch routine 1677 * (ttyinput) in "raw" mode. It usually takes about 450 1678 * instructions (that's without canonical processing or echo!). 1679 * slinput is reasonably fast (usually 40 instructions plus 1680 * call overhead). 1681 */ 1682 do { 1683 com_unlock(); 1684 incc = com->iptr - buf; 1685 if (tp->t_rawq.c_cc + incc > tp->t_ihiwat 1686 && (com->state & CS_RTS_IFLOW 1687 || tp->t_iflag & IXOFF) 1688 && !(tp->t_state & TS_TBLOCK)) 1689 ttyblock(tp); 1690 com->delta_error_counts[CE_TTY_BUF_OVERFLOW] 1691 += b_to_q((char *)buf, incc, &tp->t_rawq); 1692 buf += incc; 1693 tk_nin += incc; 1694 tk_rawcc += incc; 1695 tp->t_rawcc += incc; 1696 ttwakeup(tp); 1697 if (tp->t_state & TS_TTSTOP 1698 && (tp->t_iflag & IXANY 1699 || tp->t_cc[VSTART] == tp->t_cc[VSTOP])) { 1700 tp->t_state &= ~TS_TTSTOP; 1701 tp->t_lflag &= ~FLUSHO; 1702 comstart(tp); 1703 } 1704 com_lock(); 1705 } while (buf < com->iptr); 1706 } else { 1707 do { 1708 com_unlock(); 1709 line_status = buf[com->ierroff]; 1710 recv_data = *buf++; 1711 if (line_status 1712 & (LSR_BI | LSR_FE | LSR_OE | LSR_PE)) { 1713 if (line_status & LSR_BI) 1714 recv_data |= TTY_BI; 1715 if (line_status & LSR_FE) 1716 recv_data |= TTY_FE; 1717 if (line_status & LSR_OE) 1718 recv_data |= TTY_OE; 1719 if (line_status & LSR_PE) 1720 recv_data |= TTY_PE; 1721 } 1722 (*linesw[tp->t_line].l_rint)(recv_data, tp); 1723 com_lock(); 1724 } while (buf < com->iptr); 1725 } 1726 com_events -= (com->iptr - com->ibuf); 1727 com->iptr = com->ibuf; 1728 1729 /* 1730 * There is now room for another low-level buffer full of input, 1731 * so enable RTS if it is now disabled and there is room in the 1732 * high-level buffer. 1733 */ 1734 if ((com->state & CS_RTS_IFLOW) && !(com->mcr_image & MCR_RTS) && 1735 !(tp->t_state & TS_TBLOCK)) 1736 outb(com->modem_ctl_port, com->mcr_image |= MCR_RTS); 1737 } 1738 1739 void 1740 siointr(void *arg) 1741 { 1742 lwkt_gettoken(&tty_token); 1743 #ifndef COM_MULTIPORT 1744 com_lock(); 1745 siointr1((struct com_s *) arg); 1746 com_unlock(); 1747 #else /* COM_MULTIPORT */ 1748 bool_t possibly_more_intrs; 1749 int unit; 1750 struct com_s *com; 1751 1752 /* 1753 * Loop until there is no activity on any port. This is necessary 1754 * to get an interrupt edge more than to avoid another interrupt. 1755 * If the IRQ signal is just an OR of the IRQ signals from several 1756 * devices, then the edge from one may be lost because another is 1757 * on. 1758 */ 1759 com_lock(); 1760 do { 1761 possibly_more_intrs = FALSE; 1762 for (unit = 0; unit < sio_numunits; ++unit) { 1763 com = com_addr(unit); 1764 /* 1765 * XXX com_lock(); 1766 * would it work here, or be counter-productive? 1767 */ 1768 if (com != NULL 1769 && !com->gone 1770 && (inb(com->int_id_port) & IIR_IMASK) 1771 != IIR_NOPEND) { 1772 siointr1(com); 1773 possibly_more_intrs = TRUE; 1774 } 1775 /* XXX com_unlock(); */ 1776 } 1777 } while (possibly_more_intrs); 1778 com_unlock(); 1779 #endif /* COM_MULTIPORT */ 1780 lwkt_reltoken(&tty_token); 1781 } 1782 1783 /* 1784 * Called with tty_token held and com_lock held. 1785 */ 1786 static void 1787 siointr1(struct com_s *com) 1788 { 1789 u_char line_status; 1790 u_char modem_status; 1791 u_char *ioptr; 1792 u_char recv_data; 1793 u_char int_ctl; 1794 u_char int_ctl_new; 1795 sysclock_t count; 1796 1797 int_ctl = inb(com->intr_ctl_port); 1798 int_ctl_new = int_ctl; 1799 1800 while (!com->gone) { 1801 if (com->pps.ppsparam.mode & PPS_CAPTUREBOTH) { 1802 modem_status = inb(com->modem_status_port); 1803 if ((modem_status ^ com->last_modem_status) & MSR_DCD) { 1804 count = sys_cputimer->count(); 1805 pps_event(&com->pps, count, 1806 (modem_status & MSR_DCD) ? 1807 PPS_CAPTUREASSERT : PPS_CAPTURECLEAR); 1808 } 1809 } 1810 line_status = inb(com->line_status_port); 1811 1812 /* input event? (check first to help avoid overruns) */ 1813 while (line_status & LSR_RCV_MASK) { 1814 /* break/unnattached error bits or real input? */ 1815 if (!(line_status & LSR_RXRDY)) 1816 recv_data = 0; 1817 else 1818 recv_data = inb(com->data_port); 1819 #if defined(DDB) 1820 /* 1821 * Solaris implements a new BREAK which is initiated 1822 * by a character sequence CR ~ ^b which is similar 1823 * to a familiar pattern used on Sun servers by the 1824 * Remote Console. 1825 */ 1826 #define KEY_CRTLB 2 /* ^B */ 1827 #define KEY_CR 13 /* CR '\r' */ 1828 #define KEY_TILDE 126 /* ~ */ 1829 1830 if (com->unit == comconsole && alt_break_to_debugger) { 1831 static int brk_state1 = 0, brk_state2 = 0; 1832 if (recv_data == KEY_CR) { 1833 brk_state1 = recv_data; 1834 brk_state2 = 0; 1835 } else if (brk_state1 == KEY_CR && (recv_data == KEY_TILDE || recv_data == KEY_CRTLB)) { 1836 if (recv_data == KEY_TILDE) 1837 brk_state2 = recv_data; 1838 else if (brk_state2 == KEY_TILDE && recv_data == KEY_CRTLB) { 1839 com_unlock(); 1840 breakpoint(); 1841 com_lock(); 1842 brk_state1 = brk_state2 = 0; 1843 goto cont; 1844 } else 1845 brk_state2 = 0; 1846 } else 1847 brk_state1 = 0; 1848 } 1849 #endif 1850 if (line_status & (LSR_BI | LSR_FE | LSR_PE)) { 1851 /* 1852 * Don't store BI if IGNBRK or FE/PE if IGNPAR. 1853 * Otherwise, push the work to a higher level 1854 * (to handle PARMRK) if we're bypassing. 1855 * Otherwise, convert BI/FE and PE+INPCK to 0. 1856 * 1857 * This makes bypassing work right in the 1858 * usual "raw" case (IGNBRK set, and IGNPAR 1859 * and INPCK clear). 1860 * 1861 * Note: BI together with FE/PE means just BI. 1862 */ 1863 if (line_status & LSR_BI) { 1864 #if defined(DDB) 1865 if (com->unit == comconsole && 1866 break_to_debugger) { 1867 com_unlock(); 1868 breakpoint(); 1869 com_lock(); 1870 goto cont; 1871 } 1872 #endif 1873 if (com->tp == NULL 1874 || com->tp->t_iflag & IGNBRK) 1875 goto cont; 1876 } else { 1877 if (com->tp == NULL 1878 || com->tp->t_iflag & IGNPAR) 1879 goto cont; 1880 } 1881 if (com->tp->t_state & TS_CAN_BYPASS_L_RINT 1882 && (line_status & (LSR_BI | LSR_FE) 1883 || com->tp->t_iflag & INPCK)) 1884 recv_data = 0; 1885 } 1886 ++com->bytes_in; 1887 if (com->hotchar != 0 && recv_data == com->hotchar) 1888 setsofttty(); 1889 ioptr = com->iptr; 1890 if (ioptr >= com->ibufend) 1891 CE_RECORD(com, CE_INTERRUPT_BUF_OVERFLOW); 1892 else { 1893 if (com->do_timestamp) 1894 microtime(&com->timestamp); 1895 ++com_events; 1896 schedsofttty(); 1897 #if 0 /* for testing input latency vs efficiency */ 1898 if (com->iptr - com->ibuf == 8) 1899 setsofttty(); 1900 #endif 1901 ioptr[0] = recv_data; 1902 ioptr[com->ierroff] = line_status; 1903 com->iptr = ++ioptr; 1904 if (ioptr == com->ihighwater 1905 && com->state & CS_RTS_IFLOW) 1906 outb(com->modem_ctl_port, 1907 com->mcr_image &= ~MCR_RTS); 1908 if (line_status & LSR_OE) 1909 CE_RECORD(com, CE_OVERRUN); 1910 } 1911 cont: 1912 /* 1913 * "& 0x7F" is to avoid the gcc-1.40 generating a slow 1914 * jump from the top of the loop to here 1915 */ 1916 line_status = inb(com->line_status_port) & 0x7F; 1917 } 1918 1919 /* modem status change? (always check before doing output) */ 1920 modem_status = inb(com->modem_status_port); 1921 if (modem_status != com->last_modem_status) { 1922 if (com->do_dcd_timestamp 1923 && !(com->last_modem_status & MSR_DCD) 1924 && modem_status & MSR_DCD) 1925 microtime(&com->dcd_timestamp); 1926 1927 /* 1928 * Schedule high level to handle DCD changes. Note 1929 * that we don't use the delta bits anywhere. Some 1930 * UARTs mess them up, and it's easy to remember the 1931 * previous bits and calculate the delta. 1932 */ 1933 com->last_modem_status = modem_status; 1934 if (!(com->state & CS_CHECKMSR)) { 1935 com_events += LOTS_OF_EVENTS; 1936 com->state |= CS_CHECKMSR; 1937 setsofttty(); 1938 } 1939 1940 /* handle CTS change immediately for crisp flow ctl */ 1941 if (com->state & CS_CTS_OFLOW) { 1942 if (modem_status & MSR_CTS) 1943 com->state |= CS_ODEVREADY; 1944 else 1945 com->state &= ~CS_ODEVREADY; 1946 } 1947 } 1948 1949 /* output queued and everything ready? */ 1950 if ((line_status & LSR_TXRDY) 1951 && com->state >= (CS_BUSY | CS_TTGO | CS_ODEVREADY)) { 1952 ioptr = com->obufq.l_head; 1953 if (com->tx_fifo_size > 1) { 1954 u_int ocount; 1955 1956 ocount = com->obufq.l_tail - ioptr; 1957 if (ocount > com->tx_fifo_size) 1958 ocount = com->tx_fifo_size; 1959 com->bytes_out += ocount; 1960 do 1961 outb(com->data_port, *ioptr++); 1962 while (--ocount != 0); 1963 } else { 1964 outb(com->data_port, *ioptr++); 1965 ++com->bytes_out; 1966 } 1967 com->obufq.l_head = ioptr; 1968 if (COM_IIR_TXRDYBUG(com->flags)) { 1969 int_ctl_new = int_ctl | IER_ETXRDY; 1970 } 1971 if (ioptr >= com->obufq.l_tail) { 1972 struct lbq *qp; 1973 1974 qp = com->obufq.l_next; 1975 qp->l_queued = FALSE; 1976 qp = qp->l_next; 1977 if (qp != NULL) { 1978 com->obufq.l_head = qp->l_head; 1979 com->obufq.l_tail = qp->l_tail; 1980 com->obufq.l_next = qp; 1981 } else { 1982 /* output just completed */ 1983 if (COM_IIR_TXRDYBUG(com->flags)) { 1984 int_ctl_new = int_ctl & ~IER_ETXRDY; 1985 } 1986 com->state &= ~CS_BUSY; 1987 } 1988 if (!(com->state & CS_ODONE)) { 1989 com_events += LOTS_OF_EVENTS; 1990 com->state |= CS_ODONE; 1991 setsofttty(); /* handle at high level ASAP */ 1992 } 1993 } 1994 if (COM_IIR_TXRDYBUG(com->flags) && (int_ctl != int_ctl_new)) { 1995 outb(com->intr_ctl_port, int_ctl_new); 1996 } 1997 } 1998 1999 /* finished? */ 2000 #ifdef COM_MULTIPORT 2001 return; 2002 #else 2003 if (inb(com->int_id_port) & IIR_NOPEND) 2004 return; 2005 #endif 2006 } 2007 } 2008 2009 static int 2010 sioioctl(struct dev_ioctl_args *ap) 2011 { 2012 cdev_t dev = ap->a_head.a_dev; 2013 caddr_t data = ap->a_data; 2014 struct com_s *com; 2015 int error; 2016 int mynor; 2017 struct tty *tp; 2018 #if defined(COMPAT_43) 2019 u_long oldcmd; 2020 struct termios term; 2021 #endif 2022 lwkt_gettoken(&tty_token); 2023 mynor = minor(dev); 2024 2025 com = com_addr(MINOR_TO_UNIT(mynor)); 2026 if (com == NULL || com->gone) { 2027 lwkt_reltoken(&tty_token); 2028 return (ENODEV); 2029 } 2030 if (mynor & CONTROL_MASK) { 2031 struct termios *ct; 2032 2033 switch (mynor & CONTROL_MASK) { 2034 case CONTROL_INIT_STATE: 2035 ct = mynor & CALLOUT_MASK ? &com->it_out : &com->it_in; 2036 break; 2037 case CONTROL_LOCK_STATE: 2038 ct = mynor & CALLOUT_MASK ? &com->lt_out : &com->lt_in; 2039 break; 2040 default: 2041 lwkt_reltoken(&tty_token); 2042 return (ENODEV); /* /dev/nodev */ 2043 } 2044 switch (ap->a_cmd) { 2045 case TIOCSETA: 2046 error = priv_check_cred(ap->a_cred, PRIV_ROOT, 0); 2047 if (error != 0) { 2048 lwkt_reltoken(&tty_token); 2049 return (error); 2050 } 2051 *ct = *(struct termios *)data; 2052 lwkt_reltoken(&tty_token); 2053 return (0); 2054 case TIOCGETA: 2055 *(struct termios *)data = *ct; 2056 lwkt_reltoken(&tty_token); 2057 return (0); 2058 case TIOCGETD: 2059 *(int *)data = TTYDISC; 2060 lwkt_reltoken(&tty_token); 2061 return (0); 2062 case TIOCGWINSZ: 2063 bzero(data, sizeof(struct winsize)); 2064 lwkt_reltoken(&tty_token); 2065 return (0); 2066 default: 2067 lwkt_reltoken(&tty_token); 2068 return (ENOTTY); 2069 } 2070 } 2071 tp = com->tp; 2072 #if defined(COMPAT_43) 2073 term = tp->t_termios; 2074 oldcmd = ap->a_cmd; 2075 error = ttsetcompat(tp, &ap->a_cmd, data, &term); 2076 if (error != 0) { 2077 lwkt_reltoken(&tty_token); 2078 return (error); 2079 } 2080 if (ap->a_cmd != oldcmd) 2081 data = (caddr_t)&term; 2082 #endif 2083 if (ap->a_cmd == TIOCSETA || ap->a_cmd == TIOCSETAW || 2084 ap->a_cmd == TIOCSETAF) { 2085 int cc; 2086 struct termios *dt = (struct termios *)data; 2087 struct termios *lt = mynor & CALLOUT_MASK 2088 ? &com->lt_out : &com->lt_in; 2089 2090 dt->c_iflag = (tp->t_iflag & lt->c_iflag) 2091 | (dt->c_iflag & ~lt->c_iflag); 2092 dt->c_oflag = (tp->t_oflag & lt->c_oflag) 2093 | (dt->c_oflag & ~lt->c_oflag); 2094 dt->c_cflag = (tp->t_cflag & lt->c_cflag) 2095 | (dt->c_cflag & ~lt->c_cflag); 2096 dt->c_lflag = (tp->t_lflag & lt->c_lflag) 2097 | (dt->c_lflag & ~lt->c_lflag); 2098 for (cc = 0; cc < NCCS; ++cc) 2099 if (lt->c_cc[cc] != 0) 2100 dt->c_cc[cc] = tp->t_cc[cc]; 2101 if (lt->c_ispeed != 0) 2102 dt->c_ispeed = tp->t_ispeed; 2103 if (lt->c_ospeed != 0) 2104 dt->c_ospeed = tp->t_ospeed; 2105 } 2106 error = (*linesw[tp->t_line].l_ioctl)(tp, ap->a_cmd, data, ap->a_fflag, ap->a_cred); 2107 if (error != ENOIOCTL) { 2108 lwkt_reltoken(&tty_token); 2109 return (error); 2110 } 2111 crit_enter(); 2112 error = ttioctl(tp, ap->a_cmd, data, ap->a_fflag); 2113 disc_optim(tp, &tp->t_termios, com); 2114 if (error != ENOIOCTL) { 2115 crit_exit(); 2116 lwkt_reltoken(&tty_token); 2117 return (error); 2118 } 2119 switch (ap->a_cmd) { 2120 case TIOCSBRK: 2121 sio_setreg(com, com_cfcr, com->cfcr_image |= CFCR_SBREAK); 2122 break; 2123 case TIOCCBRK: 2124 sio_setreg(com, com_cfcr, com->cfcr_image &= ~CFCR_SBREAK); 2125 break; 2126 case TIOCSDTR: 2127 (void)commctl(com, TIOCM_DTR, DMBIS); 2128 break; 2129 case TIOCCDTR: 2130 (void)commctl(com, TIOCM_DTR, DMBIC); 2131 break; 2132 /* 2133 * XXX should disallow changing MCR_RTS if CS_RTS_IFLOW is set. The 2134 * changes get undone on the next call to comparam(). 2135 */ 2136 case TIOCMSET: 2137 (void)commctl(com, *(int *)data, DMSET); 2138 break; 2139 case TIOCMBIS: 2140 (void)commctl(com, *(int *)data, DMBIS); 2141 break; 2142 case TIOCMBIC: 2143 (void)commctl(com, *(int *)data, DMBIC); 2144 break; 2145 case TIOCMGET: 2146 *(int *)data = commctl(com, 0, DMGET); 2147 break; 2148 case TIOCMSDTRWAIT: 2149 /* must be root since the wait applies to following logins */ 2150 error = priv_check_cred(ap->a_cred, PRIV_ROOT, 0); 2151 if (error != 0) { 2152 crit_exit(); 2153 lwkt_reltoken(&tty_token); 2154 return (error); 2155 } 2156 com->dtr_wait = *(int *)data * hz / 100; 2157 break; 2158 case TIOCMGDTRWAIT: 2159 *(int *)data = com->dtr_wait * 100 / hz; 2160 break; 2161 case TIOCTIMESTAMP: 2162 com->do_timestamp = TRUE; 2163 *(struct timeval *)data = com->timestamp; 2164 break; 2165 case TIOCDCDTIMESTAMP: 2166 com->do_dcd_timestamp = TRUE; 2167 *(struct timeval *)data = com->dcd_timestamp; 2168 break; 2169 default: 2170 crit_exit(); 2171 error = pps_ioctl(ap->a_cmd, data, &com->pps); 2172 if (error == ENODEV) 2173 error = ENOTTY; 2174 lwkt_reltoken(&tty_token); 2175 return (error); 2176 } 2177 crit_exit(); 2178 lwkt_reltoken(&tty_token); 2179 return (0); 2180 } 2181 2182 static void 2183 siopoll(void *dummy, void *frame) 2184 { 2185 int unit; 2186 2187 lwkt_gettoken(&tty_token); 2188 if (com_events == 0) { 2189 lwkt_reltoken(&tty_token); 2190 return; 2191 } 2192 2193 repeat: 2194 for (unit = 0; unit < sio_numunits; ++unit) { 2195 struct com_s *com; 2196 int incc; 2197 struct tty *tp; 2198 2199 com = com_addr(unit); 2200 if (com == NULL) 2201 continue; 2202 tp = com->tp; 2203 if (tp == NULL || com->gone) { 2204 /* 2205 * Discard any events related to never-opened or 2206 * going-away devices. 2207 */ 2208 com_lock(); 2209 incc = com->iptr - com->ibuf; 2210 com->iptr = com->ibuf; 2211 if (com->state & CS_CHECKMSR) { 2212 incc += LOTS_OF_EVENTS; 2213 com->state &= ~CS_CHECKMSR; 2214 } 2215 com_events -= incc; 2216 com_unlock(); 2217 continue; 2218 } 2219 if (com->iptr != com->ibuf) { 2220 com_lock(); 2221 sioinput(com); 2222 com_unlock(); 2223 } 2224 if (com->state & CS_CHECKMSR) { 2225 u_char delta_modem_status; 2226 2227 com_lock(); 2228 delta_modem_status = com->last_modem_status 2229 ^ com->prev_modem_status; 2230 com->prev_modem_status = com->last_modem_status; 2231 com_events -= LOTS_OF_EVENTS; 2232 com->state &= ~CS_CHECKMSR; 2233 com_unlock(); 2234 if (delta_modem_status & MSR_DCD) 2235 (*linesw[tp->t_line].l_modem) 2236 (tp, com->prev_modem_status & MSR_DCD); 2237 } 2238 if (com->state & CS_ODONE) { 2239 com_lock(); 2240 com_events -= LOTS_OF_EVENTS; 2241 com->state &= ~CS_ODONE; 2242 com_unlock(); 2243 if (!(com->state & CS_BUSY) 2244 && !(com->extra_state & CSE_BUSYCHECK)) { 2245 callout_reset(&com->busy_ch, hz / 100, 2246 siobusycheck, com); 2247 com->extra_state |= CSE_BUSYCHECK; 2248 } 2249 (*linesw[tp->t_line].l_start)(tp); 2250 } 2251 if (com_events == 0) 2252 break; 2253 } 2254 if (com_events >= LOTS_OF_EVENTS) 2255 goto repeat; 2256 lwkt_reltoken(&tty_token); 2257 } 2258 2259 /* 2260 * Called with tty_token held but no com_lock 2261 */ 2262 static int 2263 comparam(struct tty *tp, struct termios *t) 2264 { 2265 u_int cfcr; 2266 int cflag; 2267 struct com_s *com; 2268 u_int divisor; 2269 u_char dlbh; 2270 u_char dlbl; 2271 int unit; 2272 2273 unit = DEV_TO_UNIT(tp->t_dev); 2274 com = com_addr(unit); 2275 if (com == NULL) { 2276 return (ENODEV); 2277 } 2278 2279 /* do historical conversions */ 2280 if (t->c_ispeed == 0) 2281 t->c_ispeed = t->c_ospeed; 2282 2283 /* check requested parameters */ 2284 if (t->c_ospeed == 0) 2285 divisor = 0; 2286 else { 2287 if (t->c_ispeed != t->c_ospeed) 2288 return (EINVAL); 2289 divisor = siodivisor(com->rclk, t->c_ispeed); 2290 if (divisor == 0) 2291 return (EINVAL); 2292 } 2293 2294 /* parameters are OK, convert them to the com struct and the device */ 2295 crit_enter(); 2296 if (divisor == 0) 2297 (void)commctl(com, TIOCM_DTR, DMBIC); /* hang up line */ 2298 else 2299 (void)commctl(com, TIOCM_DTR, DMBIS); 2300 cflag = t->c_cflag; 2301 switch (cflag & CSIZE) { 2302 case CS5: 2303 cfcr = CFCR_5BITS; 2304 break; 2305 case CS6: 2306 cfcr = CFCR_6BITS; 2307 break; 2308 case CS7: 2309 cfcr = CFCR_7BITS; 2310 break; 2311 default: 2312 cfcr = CFCR_8BITS; 2313 break; 2314 } 2315 if (cflag & PARENB) { 2316 cfcr |= CFCR_PENAB; 2317 if (!(cflag & PARODD)) 2318 cfcr |= CFCR_PEVEN; 2319 } 2320 if (cflag & CSTOPB) 2321 cfcr |= CFCR_STOPB; 2322 2323 if (com->hasfifo && divisor != 0) { 2324 /* 2325 * Use a fifo trigger level low enough so that the input 2326 * latency from the fifo is less than about 16 msec and 2327 * the total latency is less than about 30 msec. These 2328 * latencies are reasonable for humans. Serial comms 2329 * protocols shouldn't expect anything better since modem 2330 * latencies are larger. 2331 * 2332 * Interrupts can be held up for long periods of time 2333 * due to inefficiencies in other parts of the kernel, 2334 * certain video cards, etc. Setting the FIFO trigger 2335 * point to MEDH instead of HIGH gives us 694uS of slop 2336 * (8 character times) instead of 173uS (2 character times) 2337 * @ 115200 bps. 2338 */ 2339 com->fifo_image = t->c_ospeed <= 4800 2340 ? FIFO_ENABLE : FIFO_ENABLE | FIFO_RX_MEDH; 2341 #ifdef COM_ESP 2342 /* 2343 * The Hayes ESP card needs the fifo DMA mode bit set 2344 * in compatibility mode. If not, it will interrupt 2345 * for each character received. 2346 */ 2347 if (com->esp) 2348 com->fifo_image |= FIFO_DMA_MODE; 2349 #endif 2350 sio_setreg(com, com_fifo, com->fifo_image); 2351 } 2352 2353 /* 2354 * This returns with interrupts disabled so that we can complete 2355 * the speed change atomically. Keeping interrupts disabled is 2356 * especially important while com_data is hidden. 2357 */ 2358 (void) siosetwater(com, t->c_ispeed); 2359 2360 if (divisor != 0) { 2361 sio_setreg(com, com_cfcr, cfcr | CFCR_DLAB); 2362 /* 2363 * Only set the divisor registers if they would change, 2364 * since on some 16550 incompatibles (UMC8669F), setting 2365 * them while input is arriving them loses sync until 2366 * data stops arriving. 2367 */ 2368 dlbl = divisor & 0xFF; 2369 if (sio_getreg(com, com_dlbl) != dlbl) 2370 sio_setreg(com, com_dlbl, dlbl); 2371 dlbh = divisor >> 8; 2372 if (sio_getreg(com, com_dlbh) != dlbh) 2373 sio_setreg(com, com_dlbh, dlbh); 2374 } 2375 2376 sio_setreg(com, com_cfcr, com->cfcr_image = cfcr); 2377 2378 if (!(tp->t_state & TS_TTSTOP)) 2379 com->state |= CS_TTGO; 2380 2381 if (cflag & CRTS_IFLOW) { 2382 if (com->st16650a) { 2383 sio_setreg(com, com_cfcr, 0xbf); 2384 sio_setreg(com, com_fifo, 2385 sio_getreg(com, com_fifo) | 0x40); 2386 } 2387 com->state |= CS_RTS_IFLOW; 2388 /* 2389 * If CS_RTS_IFLOW just changed from off to on, the change 2390 * needs to be propagated to MCR_RTS. This isn't urgent, 2391 * so do it later by calling comstart() instead of repeating 2392 * a lot of code from comstart() here. 2393 */ 2394 } else if (com->state & CS_RTS_IFLOW) { 2395 com->state &= ~CS_RTS_IFLOW; 2396 /* 2397 * CS_RTS_IFLOW just changed from on to off. Force MCR_RTS 2398 * on here, since comstart() won't do it later. 2399 */ 2400 outb(com->modem_ctl_port, com->mcr_image |= MCR_RTS); 2401 if (com->st16650a) { 2402 sio_setreg(com, com_cfcr, 0xbf); 2403 sio_setreg(com, com_fifo, 2404 sio_getreg(com, com_fifo) & ~0x40); 2405 } 2406 } 2407 2408 2409 /* 2410 * Set up state to handle output flow control. 2411 * XXX - worth handling MDMBUF (DCD) flow control at the lowest level? 2412 * Now has 10+ msec latency, while CTS flow has 50- usec latency. 2413 */ 2414 com->state |= CS_ODEVREADY; 2415 com->state &= ~CS_CTS_OFLOW; 2416 if (cflag & CCTS_OFLOW) { 2417 com->state |= CS_CTS_OFLOW; 2418 if (!(com->last_modem_status & MSR_CTS)) 2419 com->state &= ~CS_ODEVREADY; 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 } else { 2426 if (com->st16650a) { 2427 sio_setreg(com, com_cfcr, 0xbf); 2428 sio_setreg(com, com_fifo, 2429 sio_getreg(com, com_fifo) & ~0x80); 2430 } 2431 } 2432 2433 sio_setreg(com, com_cfcr, com->cfcr_image); 2434 2435 /* XXX shouldn't call functions while intrs are disabled. */ 2436 disc_optim(tp, t, com); 2437 /* 2438 * Recover from fiddling with CS_TTGO. We used to call siointr1() 2439 * unconditionally, but that defeated the careful discarding of 2440 * stale input in sioopen(). 2441 */ 2442 if (com->state >= (CS_BUSY | CS_TTGO)) { 2443 com_lock(); 2444 siointr1(com); 2445 com_unlock(); 2446 } 2447 crit_exit(); 2448 comstart(tp); 2449 if (com->ibufold != NULL) { 2450 kfree(com->ibufold, M_DEVBUF); 2451 com->ibufold = NULL; 2452 } 2453 return (0); 2454 } 2455 2456 /* 2457 * called with tty_token held 2458 */ 2459 static int 2460 siosetwater(struct com_s *com, speed_t speed) 2461 { 2462 int cp4ticks; 2463 u_char *ibuf; 2464 int ibufsize; 2465 struct tty *tp; 2466 2467 /* 2468 * Make the buffer size large enough to handle a softtty interrupt 2469 * latency of about 2 ticks without loss of throughput or data 2470 * (about 3 ticks if input flow control is not used or not honoured, 2471 * but a bit less for CS5-CS7 modes). 2472 */ 2473 cp4ticks = speed / 10 / hz * 4; 2474 for (ibufsize = 128; ibufsize < cp4ticks;) 2475 ibufsize <<= 1; 2476 if (ibufsize == com->ibufsize) 2477 return (0); 2478 2479 /* 2480 * Allocate input buffer. The extra factor of 2 in the size is 2481 * to allow for an error byte for each input byte. 2482 */ 2483 ibuf = kmalloc(2 * ibufsize, M_DEVBUF, M_WAITOK | M_ZERO); 2484 2485 /* Initialize non-critical variables. */ 2486 com->ibufold = com->ibuf; 2487 com->ibufsize = ibufsize; 2488 tp = com->tp; 2489 if (tp != NULL) { 2490 tp->t_ififosize = 2 * ibufsize; 2491 tp->t_ispeedwat = (speed_t)-1; 2492 tp->t_ospeedwat = (speed_t)-1; 2493 } 2494 2495 /* 2496 * Read current input buffer. 2497 */ 2498 com_lock(); 2499 if (com->iptr != com->ibuf) 2500 sioinput(com); 2501 2502 /*- 2503 * Initialize critical variables, including input buffer watermarks. 2504 * The external device is asked to stop sending when the buffer 2505 * exactly reaches high water, or when the high level requests it. 2506 * The high level is notified immediately (rather than at a later 2507 * clock tick) when this watermark is reached. 2508 * The buffer size is chosen so the watermark should almost never 2509 * be reached. 2510 * The low watermark is invisibly 0 since the buffer is always 2511 * emptied all at once. 2512 */ 2513 com->iptr = com->ibuf = ibuf; 2514 com->ibufend = ibuf + ibufsize; 2515 com->ierroff = ibufsize; 2516 com->ihighwater = ibuf + 3 * ibufsize / 4; 2517 com_unlock(); 2518 return (0); 2519 } 2520 2521 static void 2522 comstart(struct tty *tp) 2523 { 2524 struct com_s *com; 2525 int unit; 2526 2527 lwkt_gettoken(&tty_token); 2528 unit = DEV_TO_UNIT(tp->t_dev); 2529 com = com_addr(unit); 2530 if (com == NULL) { 2531 lwkt_reltoken(&tty_token); 2532 return; 2533 } 2534 crit_enter(); 2535 com_lock(); 2536 if (tp->t_state & TS_TTSTOP) 2537 com->state &= ~CS_TTGO; 2538 else 2539 com->state |= CS_TTGO; 2540 if (tp->t_state & TS_TBLOCK) { 2541 if (com->mcr_image & MCR_RTS && com->state & CS_RTS_IFLOW) 2542 outb(com->modem_ctl_port, com->mcr_image &= ~MCR_RTS); 2543 } else { 2544 if (!(com->mcr_image & MCR_RTS) && com->iptr < com->ihighwater 2545 && com->state & CS_RTS_IFLOW) 2546 outb(com->modem_ctl_port, com->mcr_image |= MCR_RTS); 2547 } 2548 com_unlock(); 2549 if (tp->t_state & (TS_TIMEOUT | TS_TTSTOP)) { 2550 ttwwakeup(tp); 2551 crit_exit(); 2552 lwkt_reltoken(&tty_token); 2553 return; 2554 } 2555 if (tp->t_outq.c_cc != 0) { 2556 struct lbq *qp; 2557 struct lbq *next; 2558 2559 if (!com->obufs[0].l_queued) { 2560 com->obufs[0].l_tail 2561 = com->obuf1 + q_to_b(&tp->t_outq, com->obuf1, 2562 sizeof com->obuf1); 2563 com->obufs[0].l_next = NULL; 2564 com->obufs[0].l_queued = TRUE; 2565 com_lock(); 2566 if (com->state & CS_BUSY) { 2567 qp = com->obufq.l_next; 2568 while ((next = qp->l_next) != NULL) 2569 qp = next; 2570 qp->l_next = &com->obufs[0]; 2571 } else { 2572 com->obufq.l_head = com->obufs[0].l_head; 2573 com->obufq.l_tail = com->obufs[0].l_tail; 2574 com->obufq.l_next = &com->obufs[0]; 2575 com->state |= CS_BUSY; 2576 } 2577 com_unlock(); 2578 } 2579 if (tp->t_outq.c_cc != 0 && !com->obufs[1].l_queued) { 2580 com->obufs[1].l_tail 2581 = com->obuf2 + q_to_b(&tp->t_outq, com->obuf2, 2582 sizeof com->obuf2); 2583 com->obufs[1].l_next = NULL; 2584 com->obufs[1].l_queued = TRUE; 2585 com_lock(); 2586 if (com->state & CS_BUSY) { 2587 qp = com->obufq.l_next; 2588 while ((next = qp->l_next) != NULL) 2589 qp = next; 2590 qp->l_next = &com->obufs[1]; 2591 } else { 2592 com->obufq.l_head = com->obufs[1].l_head; 2593 com->obufq.l_tail = com->obufs[1].l_tail; 2594 com->obufq.l_next = &com->obufs[1]; 2595 com->state |= CS_BUSY; 2596 } 2597 com_unlock(); 2598 } 2599 tp->t_state |= TS_BUSY; 2600 } 2601 com_lock(); 2602 if (com->state >= (CS_BUSY | CS_TTGO)) 2603 siointr1(com); /* fake interrupt to start output */ 2604 com_unlock(); 2605 ttwwakeup(tp); 2606 crit_exit(); 2607 lwkt_reltoken(&tty_token); 2608 } 2609 2610 static void 2611 comstop(struct tty *tp, int rw) 2612 { 2613 struct com_s *com; 2614 2615 lwkt_gettoken(&tty_token); 2616 com = com_addr(DEV_TO_UNIT(tp->t_dev)); 2617 if (com == NULL || com->gone) { 2618 lwkt_reltoken(&tty_token); 2619 return; 2620 } 2621 com_lock(); 2622 if (rw & FWRITE) { 2623 if (com->hasfifo) 2624 #ifdef COM_ESP 2625 /* XXX avoid h/w bug. */ 2626 if (!com->esp) 2627 #endif 2628 sio_setreg(com, com_fifo, 2629 FIFO_XMT_RST | com->fifo_image); 2630 com->obufs[0].l_queued = FALSE; 2631 com->obufs[1].l_queued = FALSE; 2632 if (com->state & CS_ODONE) 2633 com_events -= LOTS_OF_EVENTS; 2634 com->state &= ~(CS_ODONE | CS_BUSY); 2635 com->tp->t_state &= ~TS_BUSY; 2636 } 2637 if (rw & FREAD) { 2638 if (com->hasfifo) 2639 #ifdef COM_ESP 2640 /* XXX avoid h/w bug. */ 2641 if (!com->esp) 2642 #endif 2643 sio_setreg(com, com_fifo, 2644 FIFO_RCV_RST | com->fifo_image); 2645 com_events -= (com->iptr - com->ibuf); 2646 com->iptr = com->ibuf; 2647 } 2648 com_unlock(); 2649 comstart(tp); 2650 lwkt_reltoken(&tty_token); 2651 } 2652 2653 static int 2654 commctl(struct com_s *com, int bits, int how) 2655 { 2656 int mcr; 2657 int msr; 2658 2659 lwkt_gettoken(&tty_token); 2660 if (how == DMGET) { 2661 bits = TIOCM_LE; /* XXX - always enabled while open */ 2662 mcr = com->mcr_image; 2663 if (mcr & MCR_DTR) 2664 bits |= TIOCM_DTR; 2665 if (mcr & MCR_RTS) 2666 bits |= TIOCM_RTS; 2667 msr = com->prev_modem_status; 2668 if (msr & MSR_CTS) 2669 bits |= TIOCM_CTS; 2670 if (msr & MSR_DCD) 2671 bits |= TIOCM_CD; 2672 if (msr & MSR_DSR) 2673 bits |= TIOCM_DSR; 2674 /* 2675 * XXX - MSR_RI is naturally volatile, and we make MSR_TERI 2676 * more volatile by reading the modem status a lot. Perhaps 2677 * we should latch both bits until the status is read here. 2678 */ 2679 if (msr & (MSR_RI | MSR_TERI)) 2680 bits |= TIOCM_RI; 2681 lwkt_reltoken(&tty_token); 2682 return (bits); 2683 } 2684 mcr = 0; 2685 if (bits & TIOCM_DTR) 2686 mcr |= MCR_DTR; 2687 if (bits & TIOCM_RTS) 2688 mcr |= MCR_RTS; 2689 if (com->gone) { 2690 lwkt_reltoken(&tty_token); 2691 return(0); 2692 } 2693 com_lock(); 2694 switch (how) { 2695 case DMSET: 2696 outb(com->modem_ctl_port, 2697 com->mcr_image = mcr | (com->mcr_image & MCR_IENABLE)); 2698 break; 2699 case DMBIS: 2700 outb(com->modem_ctl_port, com->mcr_image |= mcr); 2701 break; 2702 case DMBIC: 2703 outb(com->modem_ctl_port, com->mcr_image &= ~mcr); 2704 break; 2705 } 2706 com_unlock(); 2707 lwkt_reltoken(&tty_token); 2708 return (0); 2709 } 2710 2711 /* 2712 * NOTE: Must be called with tty_token held 2713 */ 2714 static void 2715 siosettimeout(void) 2716 { 2717 struct com_s *com; 2718 bool_t someopen; 2719 int unit; 2720 2721 ASSERT_LWKT_TOKEN_HELD(&tty_token); 2722 /* 2723 * Set our timeout period to 1 second if no polled devices are open. 2724 * Otherwise set it to max(1/200, 1/hz). 2725 * Enable timeouts iff some device is open. 2726 */ 2727 callout_stop(&sio_timeout_handle); 2728 sio_timeout = hz; 2729 someopen = FALSE; 2730 for (unit = 0; unit < sio_numunits; ++unit) { 2731 com = com_addr(unit); 2732 if (com != NULL && com->tp != NULL 2733 && com->tp->t_state & TS_ISOPEN && !com->gone) { 2734 someopen = TRUE; 2735 if (com->poll || com->poll_output) { 2736 sio_timeout = hz > 200 ? hz / 200 : 1; 2737 break; 2738 } 2739 } 2740 } 2741 if (someopen) { 2742 sio_timeouts_until_log = hz / sio_timeout; 2743 callout_reset(&sio_timeout_handle, sio_timeout, 2744 comwakeup, NULL); 2745 } else { 2746 /* Flush error messages, if any. */ 2747 sio_timeouts_until_log = 1; 2748 comwakeup(NULL); 2749 callout_stop(&sio_timeout_handle); 2750 } 2751 } 2752 2753 /* 2754 * NOTE: Must be called with tty_token held 2755 */ 2756 static void 2757 comwakeup(void *chan) 2758 { 2759 struct com_s *com; 2760 int unit; 2761 2762 /* 2763 * Can be called from a callout too so just get the token 2764 */ 2765 lwkt_gettoken(&tty_token); 2766 callout_reset(&sio_timeout_handle, sio_timeout, comwakeup, NULL); 2767 2768 /* 2769 * Recover from lost output interrupts. 2770 * Poll any lines that don't use interrupts. 2771 */ 2772 for (unit = 0; unit < sio_numunits; ++unit) { 2773 com = com_addr(unit); 2774 if (com != NULL && !com->gone 2775 && (com->state >= (CS_BUSY | CS_TTGO) || com->poll)) { 2776 com_lock(); 2777 siointr1(com); 2778 com_unlock(); 2779 } 2780 } 2781 2782 /* 2783 * Check for and log errors, but not too often. 2784 */ 2785 if (--sio_timeouts_until_log > 0) { 2786 lwkt_reltoken(&tty_token); 2787 return; 2788 } 2789 sio_timeouts_until_log = hz / sio_timeout; 2790 for (unit = 0; unit < sio_numunits; ++unit) { 2791 int errnum; 2792 2793 com = com_addr(unit); 2794 if (com == NULL) 2795 continue; 2796 if (com->gone) 2797 continue; 2798 for (errnum = 0; errnum < CE_NTYPES; ++errnum) { 2799 u_int delta; 2800 u_long total; 2801 2802 com_lock(); 2803 delta = com->delta_error_counts[errnum]; 2804 com->delta_error_counts[errnum] = 0; 2805 com_unlock(); 2806 if (delta == 0) 2807 continue; 2808 total = com->error_counts[errnum] += delta; 2809 log(LOG_ERR, "sio%d: %u more %s%s (total %lu)\n", 2810 unit, delta, error_desc[errnum], 2811 delta == 1 ? "" : "s", total); 2812 } 2813 } 2814 lwkt_reltoken(&tty_token); 2815 } 2816 2817 static void 2818 disc_optim(struct tty *tp, struct termios *t, struct com_s *com) 2819 { 2820 lwkt_gettoken(&tty_token); 2821 if (!(t->c_iflag & (ICRNL | IGNCR | IMAXBEL | INLCR | ISTRIP | IXON)) 2822 && (!(t->c_iflag & BRKINT) || (t->c_iflag & IGNBRK)) 2823 && (!(t->c_iflag & PARMRK) 2824 || (t->c_iflag & (IGNPAR | IGNBRK)) == (IGNPAR | IGNBRK)) 2825 && !(t->c_lflag & (ECHO | ICANON | IEXTEN | ISIG | PENDIN)) 2826 && linesw[tp->t_line].l_rint == ttyinput) 2827 tp->t_state |= TS_CAN_BYPASS_L_RINT; 2828 else 2829 tp->t_state &= ~TS_CAN_BYPASS_L_RINT; 2830 com->hotchar = linesw[tp->t_line].l_hotchar; 2831 lwkt_reltoken(&tty_token); 2832 } 2833 2834 /* 2835 * Following are all routines needed for SIO to act as console 2836 */ 2837 #include <sys/cons.h> 2838 2839 struct siocnstate { 2840 u_char dlbl; 2841 u_char dlbh; 2842 u_char ier; 2843 u_char cfcr; 2844 u_char mcr; 2845 }; 2846 2847 static speed_t siocngetspeed (Port_t, u_long rclk); 2848 #if 0 2849 static void siocnclose (struct siocnstate *sp, Port_t iobase); 2850 #endif 2851 static void siocnopen (struct siocnstate *sp, Port_t iobase, int speed); 2852 static void siocntxwait (Port_t iobase); 2853 2854 static cn_probe_t siocnprobe; 2855 static cn_init_t siocninit; 2856 static cn_init_fini_t siocninit_fini; 2857 static cn_checkc_t siocncheckc; 2858 static cn_getc_t siocngetc; 2859 static cn_putc_t siocnputc; 2860 2861 #if defined(__i386__) || defined(__x86_64__) 2862 CONS_DRIVER(sio, siocnprobe, siocninit, siocninit_fini, 2863 NULL, siocngetc, siocncheckc, siocnputc, NULL, NULL); 2864 #endif 2865 2866 /* To get the GDB related variables */ 2867 #if DDB > 0 2868 #include <ddb/ddb.h> 2869 #endif 2870 2871 static void 2872 siocntxwait(Port_t iobase) 2873 { 2874 int timo; 2875 2876 /* 2877 * Wait for any pending transmission to finish. Required to avoid 2878 * the UART lockup bug when the speed is changed, and for normal 2879 * transmits. 2880 */ 2881 timo = 100000; 2882 while ((inb(iobase + com_lsr) & (LSR_TSRE | LSR_TXRDY)) 2883 != (LSR_TSRE | LSR_TXRDY) && --timo != 0) 2884 ; 2885 } 2886 2887 /* 2888 * Read the serial port specified and try to figure out what speed 2889 * it's currently running at. We're assuming the serial port has 2890 * been initialized and is basicly idle. This routine is only intended 2891 * to be run at system startup. 2892 * 2893 * If the value read from the serial port doesn't make sense, return 0. 2894 */ 2895 /* 2896 * NOTE: Must be called with tty_token held 2897 */ 2898 static speed_t 2899 siocngetspeed(Port_t iobase, u_long rclk) 2900 { 2901 u_int divisor; 2902 u_char dlbh; 2903 u_char dlbl; 2904 u_char cfcr; 2905 2906 cfcr = inb(iobase + com_cfcr); 2907 outb(iobase + com_cfcr, CFCR_DLAB | cfcr); 2908 2909 dlbl = inb(iobase + com_dlbl); 2910 dlbh = inb(iobase + com_dlbh); 2911 2912 outb(iobase + com_cfcr, cfcr); 2913 2914 divisor = dlbh << 8 | dlbl; 2915 2916 /* XXX there should be more sanity checking. */ 2917 if (divisor == 0) 2918 return (CONSPEED); 2919 return (rclk / (16UL * divisor)); 2920 } 2921 2922 static void 2923 siocnopen(struct siocnstate *sp, Port_t iobase, int speed) 2924 { 2925 u_int divisor; 2926 u_char dlbh; 2927 u_char dlbl; 2928 2929 /* 2930 * Save all the device control registers except the fifo register 2931 * and set our default ones (cs8 -parenb speed=comdefaultrate). 2932 * We can't save the fifo register since it is read-only. 2933 */ 2934 sp->ier = inb(iobase + com_ier); 2935 outb(iobase + com_ier, 0); /* spltty() doesn't stop siointr() */ 2936 siocntxwait(iobase); 2937 sp->cfcr = inb(iobase + com_cfcr); 2938 outb(iobase + com_cfcr, CFCR_DLAB | CFCR_8BITS); 2939 sp->dlbl = inb(iobase + com_dlbl); 2940 sp->dlbh = inb(iobase + com_dlbh); 2941 /* 2942 * Only set the divisor registers if they would change, since on 2943 * some 16550 incompatibles (Startech), setting them clears the 2944 * data input register. This also reduces the effects of the 2945 * UMC8669F bug. 2946 */ 2947 divisor = siodivisor(comdefaultrclk, speed); 2948 dlbl = divisor & 0xFF; 2949 if (sp->dlbl != dlbl) 2950 outb(iobase + com_dlbl, dlbl); 2951 dlbh = divisor >> 8; 2952 if (sp->dlbh != dlbh) 2953 outb(iobase + com_dlbh, dlbh); 2954 outb(iobase + com_cfcr, CFCR_8BITS); 2955 sp->mcr = inb(iobase + com_mcr); 2956 /* 2957 * We don't want interrupts, but must be careful not to "disable" 2958 * them by clearing the MCR_IENABLE bit, since that might cause 2959 * an interrupt by floating the IRQ line. 2960 */ 2961 outb(iobase + com_mcr, (sp->mcr & MCR_IENABLE) | MCR_DTR | MCR_RTS); 2962 } 2963 2964 #if 0 2965 static void 2966 siocnclose(struct siocnstate *sp, Port_t iobase) 2967 { 2968 /* 2969 * Restore the device control registers. 2970 */ 2971 siocntxwait(iobase); 2972 outb(iobase + com_cfcr, CFCR_DLAB | CFCR_8BITS); 2973 if (sp->dlbl != inb(iobase + com_dlbl)) 2974 outb(iobase + com_dlbl, sp->dlbl); 2975 if (sp->dlbh != inb(iobase + com_dlbh)) 2976 outb(iobase + com_dlbh, sp->dlbh); 2977 outb(iobase + com_cfcr, sp->cfcr); 2978 /* 2979 * XXX damp oscillations of MCR_DTR and MCR_RTS by not restoring them. 2980 */ 2981 outb(iobase + com_mcr, sp->mcr | MCR_DTR | MCR_RTS); 2982 outb(iobase + com_ier, sp->ier); 2983 } 2984 #endif 2985 2986 static void 2987 siocnprobe(struct consdev *cp) 2988 { 2989 u_char cfcr; 2990 u_int divisor; 2991 int unit; 2992 struct siocnstate sp; 2993 2994 /* 2995 * Find our first enabled console, if any. If it is a high-level 2996 * console device, then initialize it and return successfully. 2997 * If it is a low-level console device, then initialize it and 2998 * return unsuccessfully. It must be initialized in both cases 2999 * for early use by console drivers and debuggers. Initializing 3000 * the hardware is not necessary in all cases, since the i/o 3001 * routines initialize it on the fly, but it is necessary if 3002 * input might arrive while the hardware is switched back to an 3003 * uninitialized state. We can't handle multiple console devices 3004 * yet because our low-level routines don't take a device arg. 3005 * We trust the user to set the console flags properly so that we 3006 * don't need to probe. 3007 */ 3008 cp->cn_pri = CN_DEAD; 3009 3010 for (unit = 0; unit < 16; unit++) { /* XXX need to know how many */ 3011 int flags; 3012 int disabled; 3013 if (resource_int_value("sio", unit, "disabled", &disabled) == 0) { 3014 if (disabled) 3015 continue; 3016 } 3017 if (resource_int_value("sio", unit, "flags", &flags)) 3018 continue; 3019 if (COM_CONSOLE(flags) || COM_DEBUGGER(flags)) { 3020 int port; 3021 int baud; 3022 Port_t iobase; 3023 speed_t boot_speed; 3024 3025 if (resource_int_value("sio", unit, "port", &port)) 3026 continue; 3027 if (resource_int_value("sio", unit, "baud", &baud) == 0) 3028 boot_speed = baud; 3029 else 3030 boot_speed = 0; 3031 iobase = port; 3032 crit_enter(); 3033 if (boothowto & RB_SERIAL) { 3034 if (boot_speed == 0) { 3035 boot_speed = siocngetspeed(iobase, 3036 comdefaultrclk); 3037 } 3038 if (boot_speed) 3039 comdefaultrate = boot_speed; 3040 } 3041 3042 /* 3043 * Initialize the divisor latch. We can't rely on 3044 * siocnopen() to do this the first time, since it 3045 * avoids writing to the latch if the latch appears 3046 * to have the correct value. Also, if we didn't 3047 * just read the speed from the hardware, then we 3048 * need to set the speed in hardware so that 3049 * switching it later is null. 3050 */ 3051 com_lock(); 3052 cfcr = inb(iobase + com_cfcr); 3053 outb(iobase + com_cfcr, CFCR_DLAB | cfcr); 3054 divisor = siodivisor(comdefaultrclk, comdefaultrate); 3055 outb(iobase + com_dlbl, divisor & 0xff); 3056 outb(iobase + com_dlbh, divisor >> 8); 3057 outb(iobase + com_cfcr, cfcr); 3058 3059 siocnopen(&sp, iobase, comdefaultrate); 3060 com_unlock(); 3061 3062 crit_exit(); 3063 if (COM_CONSOLE(flags) && !COM_LLCONSOLE(flags)) { 3064 cp->cn_probegood = 1; 3065 cp->cn_private = (void *)(intptr_t)unit; 3066 cp->cn_pri = COM_FORCECONSOLE(flags) 3067 || boothowto & RB_SERIAL 3068 ? CN_REMOTE : CN_NORMAL; 3069 siocniobase = iobase; 3070 siocnunit = unit; 3071 } 3072 if (COM_DEBUGGER(flags) && gdb_tab == NULL) { 3073 kprintf("sio%d: gdb debugging port\n", unit); 3074 siogdbiobase = iobase; 3075 siogdbunit = unit; 3076 #if DDB > 0 3077 cp->cn_gdbprivate = (void *)(intptr_t)unit; 3078 gdb_tab = cp; 3079 #endif 3080 } 3081 } 3082 } 3083 #if defined(__i386__) || defined(__x86_64__) 3084 #if DDB > 0 3085 /* 3086 * XXX Ugly Compatability. 3087 * If no gdb port has been specified, set it to be the console 3088 * as some configuration files don't specify the gdb port. 3089 */ 3090 if (gdb_tab == NULL && (boothowto & RB_GDB)) { 3091 kprintf("Warning: no GDB port specified. Defaulting to sio%d.\n", 3092 siocnunit); 3093 kprintf("Set flag 0x80 on desired GDB port in your\n"); 3094 kprintf("configuration file (currently sio only).\n"); 3095 siogdbiobase = siocniobase; 3096 siogdbunit = siocnunit; 3097 cp->cn_gdbprivate = (void *)(intptr_t)siocnunit; 3098 gdb_tab = cp; 3099 } 3100 #endif 3101 #endif 3102 } 3103 3104 static void 3105 siocninit(struct consdev *cp) 3106 { 3107 comconsole = (int)(intptr_t)cp->cn_private; 3108 } 3109 3110 static void 3111 siocninit_fini(struct consdev *cp) 3112 { 3113 cdev_t dev; 3114 int unit; 3115 3116 if (cp->cn_probegood) { 3117 unit = (int)(intptr_t)cp->cn_private; 3118 /* 3119 * Call devfs_find_device_by_name on ttydX to find the correct device, 3120 * as it should have been created already at this point by the 3121 * attach routine. 3122 * If it isn't found, the serial port was not attached at all and we 3123 * shouldn't be here, so assert this case. 3124 */ 3125 dev = devfs_find_device_by_name("ttyd%r", unit); 3126 3127 KKASSERT(dev != NULL); 3128 cp->cn_dev = dev; 3129 } 3130 } 3131 3132 static int 3133 siocncheckc(void *private) 3134 { 3135 int c; 3136 int unit = (int)(intptr_t)private; 3137 Port_t iobase; 3138 #if 0 3139 struct siocnstate sp; 3140 #endif 3141 3142 if (unit == siogdbunit) 3143 iobase = siogdbiobase; 3144 else 3145 iobase = siocniobase; 3146 com_lock(); 3147 crit_enter(); 3148 #if 0 3149 siocnopen(&sp, iobase, comdefaultrate); 3150 #endif 3151 if (inb(iobase + com_lsr) & LSR_RXRDY) 3152 c = inb(iobase + com_data); 3153 else 3154 c = -1; 3155 #if 0 3156 siocnclose(&sp, iobase); 3157 #endif 3158 crit_exit(); 3159 com_unlock(); 3160 return (c); 3161 } 3162 3163 3164 int 3165 siocngetc(void *private) 3166 { 3167 int c; 3168 int unit = (int)(intptr_t)private; 3169 Port_t iobase; 3170 #if 0 3171 struct siocnstate sp; 3172 #endif 3173 3174 if (unit == siogdbunit) 3175 iobase = siogdbiobase; 3176 else 3177 iobase = siocniobase; 3178 com_lock(); 3179 crit_enter(); 3180 #if 0 3181 siocnopen(&sp, iobase, comdefaultrate); 3182 #endif 3183 while (!(inb(iobase + com_lsr) & LSR_RXRDY)) 3184 ; 3185 c = inb(iobase + com_data); 3186 #if 0 3187 siocnclose(&sp, iobase); 3188 #endif 3189 crit_exit(); 3190 com_unlock(); 3191 return (c); 3192 } 3193 3194 void 3195 siocnputc(void *private, int c) 3196 { 3197 int unit = (int)(intptr_t)private; 3198 #if 0 3199 struct siocnstate sp; 3200 #endif 3201 Port_t iobase; 3202 3203 if (unit == siogdbunit) 3204 iobase = siogdbiobase; 3205 else 3206 iobase = siocniobase; 3207 com_lock(); 3208 crit_enter(); 3209 #if 0 3210 siocnopen(&sp, iobase, comdefaultrate); 3211 #endif 3212 siocntxwait(iobase); 3213 outb(iobase + com_data, c); 3214 #if 0 3215 siocnclose(&sp, iobase); 3216 #endif 3217 crit_exit(); 3218 com_unlock(); 3219 } 3220 3221 DRIVER_MODULE(sio, isa, sio_isa_driver, sio_devclass, NULL, NULL); 3222 DRIVER_MODULE(sio, acpi, sio_isa_driver, sio_devclass, NULL, NULL); 3223 #if NPCI > 0 3224 DRIVER_MODULE(sio, pci, sio_pci_driver, sio_devclass, NULL, NULL); 3225 #endif 3226 #if NPUC > 0 3227 DRIVER_MODULE(sio, puc, sio_puc_driver, sio_devclass, NULL, NULL); 3228 #endif 3229