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. Neither the name of the University nor the names of its contributors 16 * may be used to endorse or promote products derived from this software 17 * without specific prior written permission. 18 * 19 * THIS SOFTWARE IS PROVIDED BY THE REGENTS AND CONTRIBUTORS ``AS IS'' AND 20 * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE 21 * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE 22 * ARE DISCLAIMED. IN NO EVENT SHALL THE REGENTS OR CONTRIBUTORS BE LIABLE 23 * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL 24 * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS 25 * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) 26 * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT 27 * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY 28 * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF 29 * SUCH DAMAGE. 30 * 31 * $FreeBSD: src/sys/isa/sio.c,v 1.291.2.35 2003/05/18 08:51:15 murray Exp $ 32 * from: @(#)com.c 7.5 (Berkeley) 5/16/91 33 * from: i386/isa sio.c,v 1.234 34 */ 35 36 #include "opt_comconsole.h" 37 #include "opt_ddb.h" 38 #include "opt_sio.h" 39 #include "use_pci.h" 40 #include "use_puc.h" 41 42 /* 43 * Serial driver, based on 386BSD-0.1 com driver. 44 * Mostly rewritten to use pseudo-DMA. 45 * Works for National Semiconductor NS8250-NS16550AF UARTs. 46 * COM driver, based on HP dca driver. 47 * 48 * Changes for PC-Card integration: 49 * - Added PC-Card driver table and handlers 50 */ 51 #include <sys/param.h> 52 #include <sys/systm.h> 53 #include <sys/reboot.h> 54 #include <sys/malloc.h> 55 #include <sys/tty.h> 56 #include <sys/ttydefaults.h> /* for TTYDEF_* */ 57 #include <sys/proc.h> 58 #include <sys/priv.h> 59 #include <sys/module.h> 60 #include <sys/conf.h> 61 #include <sys/dkstat.h> 62 #include <sys/fcntl.h> 63 #include <sys/interrupt.h> 64 #include <sys/kernel.h> 65 #include <sys/syslog.h> 66 #include <sys/sysctl.h> 67 #include <sys/bus.h> 68 #include <sys/rman.h> 69 #include <sys/timepps.h> 70 #include <sys/thread2.h> 71 #include <sys/devfs.h> 72 #include <sys/consio.h> 73 74 #include <machine/limits.h> 75 76 #include <bus/isa/isareg.h> 77 #include <bus/isa/isavar.h> 78 #if NPCI > 0 79 #include <bus/pci/pcireg.h> 80 #include <bus/pci/pcivar.h> 81 #endif 82 #if NPUC > 0 83 #include <dev/misc/puc/pucvar.h> 84 #endif 85 #include <machine/lock.h> 86 87 #include <machine/clock.h> 88 89 #include "sioreg.h" 90 #include "sio_private.h" 91 92 #ifdef COM_ESP 93 #include "../ic_layer/esp.h" 94 #endif 95 96 #define LOTS_OF_EVENTS 64 /* helps separate urgent events from input */ 97 98 #define CALLOUT_MASK 0x80 99 #define CONTROL_MASK 0x60 100 #define CONTROL_INIT_STATE 0x20 101 #define CONTROL_LOCK_STATE 0x40 102 #define DEV_TO_UNIT(dev) (MINOR_TO_UNIT(minor(dev))) 103 #define MINOR_TO_UNIT(mynor) ((((mynor) & ~0xffffU) >> (8 + 3)) \ 104 | ((mynor) & 0x1f)) 105 #define UNIT_TO_MINOR(unit) ((((unit) & ~0x1fU) << (8 + 3)) \ 106 | ((unit) & 0x1f)) 107 108 #define com_scr 7 /* scratch register for 16450-16550 (R/W) */ 109 110 #define sio_getreg(com, off) \ 111 (bus_space_read_1((com)->bst, (com)->bsh, (off))) 112 #define sio_setreg(com, off, value) \ 113 (bus_space_write_1((com)->bst, (com)->bsh, (off), (value))) 114 115 /* 116 * com state bits. 117 * (CS_BUSY | CS_TTGO) and (CS_BUSY | CS_TTGO | CS_ODEVREADY) must be higher 118 * than the other bits so that they can be tested as a group without masking 119 * off the low bits. 120 * 121 * The following com and tty flags correspond closely: 122 * CS_BUSY = TS_BUSY (maintained by comstart(), siopoll() and 123 * comstop()) 124 * CS_TTGO = ~TS_TTSTOP (maintained by comparam() and comstart()) 125 * CS_CTS_OFLOW = CCTS_OFLOW (maintained by comparam()) 126 * CS_RTS_IFLOW = CRTS_IFLOW (maintained by comparam()) 127 * TS_FLUSH is not used. 128 * XXX I think TIOCSETA doesn't clear TS_TTSTOP when it clears IXON. 129 * XXX CS_*FLOW should be CF_*FLOW in com->flags (control flags not state). 130 */ 131 #define CS_BUSY 0x80 /* output in progress */ 132 #define CS_TTGO 0x40 /* output not stopped by XOFF */ 133 #define CS_ODEVREADY 0x20 /* external device h/w ready (CTS) */ 134 #define CS_CHECKMSR 1 /* check of MSR scheduled */ 135 #define CS_CTS_OFLOW 2 /* use CTS output flow control */ 136 #define CS_DTR_OFF 0x10 /* DTR held off */ 137 #define CS_ODONE 4 /* output completed */ 138 #define CS_RTS_IFLOW 8 /* use RTS input flow control */ 139 #define CSE_BUSYCHECK 1 /* siobusycheck() scheduled */ 140 141 static char const * const error_desc[] = { 142 #define CE_OVERRUN 0 143 "silo overflow", 144 #define CE_INTERRUPT_BUF_OVERFLOW 1 145 "interrupt-level buffer overflow", 146 #define CE_TTY_BUF_OVERFLOW 2 147 "tty-level buffer overflow", 148 }; 149 150 #ifdef COM_ESP 151 static int espattach (struct com_s *com, Port_t esp_port); 152 #endif 153 static int sio_isa_attach (device_t dev); 154 155 static timeout_t siobusycheck; 156 static u_int siodivisor (u_long rclk, speed_t speed); 157 static timeout_t siodtrwakeup; 158 static void comhardclose (struct com_s *com); 159 static void sioinput (struct com_s *com); 160 static void siointr1 (struct com_s *com); 161 static void siointr (void *arg); 162 static int commctl (struct com_s *com, int bits, int how); 163 static int comparam (struct tty *tp, struct termios *t); 164 static inthand2_t siopoll; 165 static int sio_isa_probe (device_t dev); 166 static void siosettimeout (void); 167 static int siosetwater (struct com_s *com, speed_t speed); 168 static void comstart (struct tty *tp); 169 static void comstop (struct tty *tp, int rw); 170 static timeout_t comwakeup; 171 static void disc_optim (struct tty *tp, struct termios *t, 172 struct com_s *com); 173 static void siocntxwait (Port_t iobase); 174 175 #if NPCI > 0 176 static int sio_pci_attach (device_t dev); 177 static void sio_pci_kludge_unit (device_t dev); 178 static int sio_pci_probe (device_t dev); 179 #endif /* NPCI > 0 */ 180 181 #if NPUC > 0 182 static int sio_puc_attach (device_t dev); 183 static int sio_puc_probe (device_t dev); 184 #endif /* NPUC > 0 */ 185 186 static char driver_name[] = "sio"; 187 188 /* table and macro for fast conversion from a unit number to its com struct */ 189 devclass_t sio_devclass; 190 #define com_addr(unit) ((struct com_s *) \ 191 devclass_get_softc(sio_devclass, unit)) 192 193 static device_method_t sio_isa_methods[] = { 194 /* Device interface */ 195 DEVMETHOD(device_probe, sio_isa_probe), 196 DEVMETHOD(device_attach, sio_isa_attach), 197 198 DEVMETHOD_END 199 }; 200 201 static driver_t sio_isa_driver = { 202 driver_name, 203 sio_isa_methods, 204 sizeof(struct com_s), 205 }; 206 207 #if NPCI > 0 208 static device_method_t sio_pci_methods[] = { 209 /* Device interface */ 210 DEVMETHOD(device_probe, sio_pci_probe), 211 DEVMETHOD(device_attach, sio_pci_attach), 212 213 DEVMETHOD_END 214 }; 215 216 static driver_t sio_pci_driver = { 217 driver_name, 218 sio_pci_methods, 219 sizeof(struct com_s), 220 }; 221 #endif /* NPCI > 0 */ 222 223 #if NPUC > 0 224 static device_method_t sio_puc_methods[] = { 225 /* Device interface */ 226 DEVMETHOD(device_probe, sio_puc_probe), 227 DEVMETHOD(device_attach, sio_puc_attach), 228 229 DEVMETHOD_END 230 }; 231 232 static driver_t sio_puc_driver = { 233 driver_name, 234 sio_puc_methods, 235 sizeof(struct com_s), 236 }; 237 #endif /* NPUC > 0 */ 238 239 static d_open_t sioopen; 240 static d_close_t sioclose; 241 static d_read_t sioread; 242 static d_write_t siowrite; 243 static d_ioctl_t sioioctl; 244 245 static struct dev_ops sio_ops = { 246 { driver_name, 0, D_TTY }, 247 .d_open = sioopen, 248 .d_close = sioclose, 249 .d_read = sioread, 250 .d_write = siowrite, 251 .d_ioctl = sioioctl, 252 .d_kqfilter = ttykqfilter, 253 .d_revoke = ttyrevoke 254 }; 255 256 int comconsole = -1; 257 static volatile speed_t comdefaultrate = CONSPEED; 258 static u_long comdefaultrclk = DEFAULT_RCLK; 259 SYSCTL_ULONG(_machdep, OID_AUTO, conrclk, CTLFLAG_RW, &comdefaultrclk, 0, ""); 260 static u_int com_events; /* input chars + weighted output completions */ 261 static Port_t siocniobase; 262 static int siocnunit; 263 static Port_t siogdbiobase; 264 static int siogdbunit = -1; 265 static bool_t sio_registered; 266 static int sio_timeout; 267 static int sio_timeouts_until_log; 268 static struct callout sio_timeout_handle; 269 static int sio_numunits; 270 271 #ifdef COM_ESP 272 /* XXX configure this properly. */ 273 static Port_t likely_com_ports[] = { 0x3f8, 0x2f8, 0x3e8, 0x2e8, }; 274 static Port_t likely_esp_ports[] = { 0x140, 0x180, 0x280, 0 }; 275 #endif 276 277 /* 278 * handle sysctl read/write requests for console speed 279 * 280 * In addition to setting comdefaultrate for I/O through /dev/console, 281 * also set the initial and lock values for the /dev/ttyXX device 282 * if there is one associated with the console. Finally, if the /dev/tty 283 * device has already been open, change the speed on the open running port 284 * itself. 285 */ 286 287 static int 288 sysctl_machdep_comdefaultrate(SYSCTL_HANDLER_ARGS) 289 { 290 int error; 291 speed_t newspeed; 292 struct com_s *com; 293 struct tty *tp; 294 295 lwkt_gettoken(&tty_token); 296 newspeed = comdefaultrate; 297 298 error = sysctl_handle_opaque(oidp, &newspeed, sizeof newspeed, req); 299 if (error || !req->newptr) { 300 lwkt_reltoken(&tty_token); 301 return (error); 302 } 303 304 comdefaultrate = newspeed; 305 306 if (comconsole < 0) { /* serial console not selected? */ 307 lwkt_reltoken(&tty_token); 308 return (0); 309 } 310 311 com = com_addr(comconsole); 312 if (com == NULL) { 313 lwkt_reltoken(&tty_token); 314 return (ENXIO); 315 } 316 317 /* 318 * set the initial and lock rates for /dev/ttydXX and /dev/cuaXX 319 * (note, the lock rates really are boolean -- if non-zero, disallow 320 * speed changes) 321 */ 322 com->it_in.c_ispeed = com->it_in.c_ospeed = 323 com->lt_in.c_ispeed = com->lt_in.c_ospeed = 324 com->it_out.c_ispeed = com->it_out.c_ospeed = 325 com->lt_out.c_ispeed = com->lt_out.c_ospeed = comdefaultrate; 326 327 /* 328 * if we're open, change the running rate too 329 */ 330 tp = com->tp; 331 if (tp && (tp->t_state & TS_ISOPEN)) { 332 tp->t_termios.c_ispeed = 333 tp->t_termios.c_ospeed = comdefaultrate; 334 crit_enter(); 335 error = comparam(tp, &tp->t_termios); 336 crit_exit(); 337 } 338 lwkt_reltoken(&tty_token); 339 return error; 340 } 341 342 SYSCTL_PROC(_machdep, OID_AUTO, conspeed, CTLTYPE_INT | CTLFLAG_RW, 343 0, 0, sysctl_machdep_comdefaultrate, "I", ""); 344 345 #if NPCI > 0 346 struct pci_ids { 347 u_int32_t type; 348 const char *desc; 349 int rid; 350 }; 351 352 static struct pci_ids pci_ids[] = { 353 { 0x100812b9, "3COM PCI FaxModem", 0x10 }, 354 { 0x2000131f, "CyberSerial (1-port) 16550", 0x10 }, 355 { 0x01101407, "Koutech IOFLEX-2S PCI Dual Port Serial", 0x10 }, 356 { 0x01111407, "Koutech IOFLEX-2S PCI Dual Port Serial", 0x10 }, 357 { 0x048011c1, "Lucent kermit based PCI Modem", 0x14 }, 358 { 0x95211415, "Oxford Semiconductor PCI Dual Port Serial", 0x10 }, 359 { 0x7101135e, "SeaLevel Ultra 530.PCI Single Port Serial", 0x18 }, 360 { 0x0000151f, "SmartLink 5634PCV SurfRider", 0x10 }, 361 { 0x98459710, "Netmos Nm9845 PCI Bridge with Dual UART", 0x10 }, 362 { 0x99229710, "MCS9922 PCIe Multi-I/O Controller", 0x10 }, 363 { 0x8c3d8086, "Intel Lynx Point KT Controller", 0x10 }, 364 { 0x9c3d8086, "Intel Lynx Point-LP HECI KT", 0x10 }, 365 { 0x8cbd8086, "Intel Wildcat Point KT Controller", 0x10 }, 366 { 0x9cbd8086, "Intel Wildcat Point-LP KT Controller", 0x10 }, 367 { 0x00000000, NULL, 0 } 368 }; 369 370 static int 371 sio_pci_attach(device_t dev) 372 { 373 u_int32_t type; 374 struct pci_ids *id; 375 376 type = pci_get_devid(dev); 377 id = pci_ids; 378 while (id->type && id->type != type) 379 id++; 380 if (id->desc == NULL) 381 return (ENXIO); 382 sio_pci_kludge_unit(dev); 383 return (sioattach(dev, id->rid, 0UL)); 384 } 385 386 /* 387 * Don't cut and paste this to other drivers. It is a horrible kludge 388 * which will fail to work and also be unnecessary in future versions. 389 */ 390 static void 391 sio_pci_kludge_unit(device_t dev) 392 { 393 devclass_t dc; 394 int err; 395 int start; 396 int unit; 397 398 unit = 0; 399 start = 0; 400 while (resource_int_value("sio", unit, "port", &start) == 0 && 401 start > 0) 402 unit++; 403 if (device_get_unit(dev) < unit) { 404 dc = device_get_devclass(dev); 405 while (devclass_get_device(dc, unit)) 406 unit++; 407 device_printf(dev, "moving to sio%d\n", unit); 408 err = device_set_unit(dev, unit); /* EVIL DO NOT COPY */ 409 if (err) 410 device_printf(dev, "error moving device %d\n", err); 411 } 412 } 413 414 static int 415 sio_pci_probe(device_t dev) 416 { 417 u_int32_t type; 418 struct pci_ids *id; 419 420 type = pci_get_devid(dev); 421 id = pci_ids; 422 while (id->type && id->type != type) 423 id++; 424 if (id->desc == NULL) 425 return (ENXIO); 426 device_set_desc(dev, id->desc); 427 return (sioprobe(dev, id->rid, 0UL)); 428 } 429 #endif /* NPCI > 0 */ 430 431 #if NPUC > 0 432 static int 433 sio_puc_attach(device_t dev) 434 { 435 uintptr_t rclk; 436 437 if (BUS_READ_IVAR(device_get_parent(dev), dev, PUC_IVAR_FREQ, 438 &rclk) != 0) 439 rclk = DEFAULT_RCLK; 440 return (sioattach(dev, 0, rclk)); 441 } 442 443 static int 444 sio_puc_probe(device_t dev) 445 { 446 uintptr_t rclk; 447 448 if (BUS_READ_IVAR(device_get_parent(dev), dev, PUC_IVAR_FREQ, 449 &rclk) != 0) 450 rclk = DEFAULT_RCLK; 451 return (sioprobe(dev, 0, rclk)); 452 } 453 #endif /* NPUC */ 454 455 static struct isa_pnp_id sio_ids[] = { 456 {0x0005d041, "Standard PC COM port"}, /* PNP0500 */ 457 {0x0105d041, "16550A-compatible COM port"}, /* PNP0501 */ 458 {0x0205d041, "Multiport serial device (non-intelligent 16550)"}, /* PNP0502 */ 459 {0x1005d041, "Generic IRDA-compatible device"}, /* PNP0510 */ 460 {0x1105d041, "Generic IRDA-compatible device"}, /* PNP0511 */ 461 /* Devices that do not have a compatid */ 462 {0x12206804, NULL}, /* ACH2012 - 5634BTS 56K Video Ready Modem */ 463 {0x7602a904, NULL}, /* AEI0276 - 56K v.90 Fax Modem (LKT) */ 464 {0x00007905, NULL}, /* AKY0000 - 56K Plug&Play Modem */ 465 {0x21107905, NULL}, /* AKY1021 - 56K Plug&Play Modem */ 466 {0x01405407, NULL}, /* AZT4001 - AZT3000 PnP SOUND DEVICE, MODEM */ 467 {0x56039008, NULL}, /* BDP0356 - Best Data 56x2 */ 468 {0x56159008, NULL}, /* BDP1556 - B.D. Smart One 56SPS,Voice Modem*/ 469 {0x36339008, NULL}, /* BDP3336 - Best Data Prods. 336F */ 470 {0x0014490a, NULL}, /* BRI1400 - Boca 33.6 PnP */ 471 {0x0015490a, NULL}, /* BRI1500 - Internal Fax Data */ 472 {0x0034490a, NULL}, /* BRI3400 - Internal ACF Modem */ 473 {0x0094490a, NULL}, /* BRI9400 - Boca K56Flex PnP */ 474 {0x00b4490a, NULL}, /* BRIB400 - Boca 56k PnP */ 475 {0x0030320d, NULL}, /* CIR3000 - Cirrus Logic V43 */ 476 {0x0100440e, NULL}, /* CRD0001 - Cardinal MVP288IV ? */ 477 {0x01308c0e, NULL}, /* CTL3001 - Creative Labs Phoneblaster */ 478 {0x36033610, NULL}, /* DAV0336 - DAVICOM 336PNP MODEM */ 479 {0x01009416, NULL}, /* ETT0001 - E-Tech Bullet 33k6 PnP */ 480 {0x0000aa1a, NULL}, /* FUJ0000 - FUJITSU Modem 33600 PNP/I2 */ 481 {0x1200c31e, NULL}, /* GVC0012 - VF1128HV-R9 (win modem?) */ 482 {0x0303c31e, NULL}, /* GVC0303 - MaxTech 33.6 PnP D/F/V */ 483 {0x0505c31e, NULL}, /* GVC0505 - GVC 56k Faxmodem */ 484 {0x0116c31e, NULL}, /* GVC1601 - Rockwell V.34 Plug & Play Modem */ 485 {0x0050c31e, NULL}, /* GVC5000 - some GVC modem */ 486 {0x3800f91e, NULL}, /* GWY0038 - Telepath with v.90 */ 487 {0x9062f91e, NULL}, /* GWY6290 - Telepath with x2 Technology */ 488 {0x8100e425, NULL}, /* IOD0081 - I-O DATA DEVICE,INC. IFML-560 */ 489 {0x21002534, NULL}, /* MAE0021 - Jetstream Int V.90 56k Voice Series 2*/ 490 {0x0000f435, NULL}, /* MOT0000 - Motorola ModemSURFR 33.6 Intern */ 491 {0x5015f435, NULL}, /* MOT1550 - Motorola ModemSURFR 56K Modem */ 492 {0xf015f435, NULL}, /* MOT15F0 - Motorola VoiceSURFR 56K Modem */ 493 {0x6045f435, NULL}, /* MOT4560 - Motorola ? */ 494 {0x61e7a338, NULL}, /* NECE761 - 33.6Modem */ 495 {0x08804f3f, NULL}, /* OZO8008 - Zoom (33.6k Modem) */ 496 {0x0f804f3f, NULL}, /* OZO800f - Zoom 2812 (56k Modem) */ 497 {0x39804f3f, NULL}, /* OZO8039 - Zoom 56k flex */ 498 {0x00914f3f, NULL}, /* OZO9100 - Zoom 2919 (K56 Faxmodem) */ 499 {0x3024a341, NULL}, /* PMC2430 - Pace 56 Voice Internal Modem */ 500 {0x1000eb49, NULL}, /* ROK0010 - Rockwell ? */ 501 {0x1200b23d, NULL}, /* RSS0012 - OMRON ME5614ISA */ 502 {0x5002734a, NULL}, /* RSS0250 - 5614Jx3(G) Internal Modem */ 503 {0x6202734a, NULL}, /* RSS0262 - 5614Jx3[G] V90+K56Flex Modem */ 504 {0x1010104d, NULL}, /* SHP1010 - Rockwell 33600bps Modem */ 505 {0xc100ad4d, NULL}, /* SMM00C1 - Leopard 56k PnP */ 506 {0x9012b04e, NULL}, /* SUP1290 - Supra ? */ 507 {0x1013b04e, NULL}, /* SUP1310 - SupraExpress 336i PnP */ 508 {0x8013b04e, NULL}, /* SUP1380 - SupraExpress 288i PnP Voice */ 509 {0x8113b04e, NULL}, /* SUP1381 - SupraExpress 336i PnP Voice */ 510 {0x5016b04e, NULL}, /* SUP1650 - Supra 336i Sp Intl */ 511 {0x7016b04e, NULL}, /* SUP1670 - Supra 336i V+ Intl */ 512 {0x7420b04e, NULL}, /* SUP2070 - Supra ? */ 513 {0x8020b04e, NULL}, /* SUP2080 - Supra ? */ 514 {0x8420b04e, NULL}, /* SUP2084 - SupraExpress 56i PnP */ 515 {0x7121b04e, NULL}, /* SUP2171 - SupraExpress 56i Sp? */ 516 {0x8024b04e, NULL}, /* SUP2480 - Supra ? */ 517 {0x01007256, NULL}, /* USR0001 - U.S. Robotics Inc., Sportster W */ 518 {0x02007256, NULL}, /* USR0002 - U.S. Robotics Inc. Sportster 33. */ 519 {0x04007256, NULL}, /* USR0004 - USR Sportster 14.4k */ 520 {0x06007256, NULL}, /* USR0006 - USR Sportster 33.6k */ 521 {0x11007256, NULL}, /* USR0011 - USR ? */ 522 {0x01017256, NULL}, /* USR0101 - USR ? */ 523 {0x30207256, NULL}, /* USR2030 - U.S.Robotics Inc. Sportster 560 */ 524 {0x50207256, NULL}, /* USR2050 - U.S.Robotics Inc. Sportster 33. */ 525 {0x70207256, NULL}, /* USR2070 - U.S.Robotics Inc. Sportster 560 */ 526 {0x30307256, NULL}, /* USR3030 - U.S. Robotics 56K FAX INT */ 527 {0x31307256, NULL}, /* USR3031 - U.S. Robotics 56K FAX INT */ 528 {0x50307256, NULL}, /* USR3050 - U.S. Robotics 56K FAX INT */ 529 {0x70307256, NULL}, /* USR3070 - U.S. Robotics 56K Voice INT */ 530 {0x90307256, NULL}, /* USR3090 - USR ? */ 531 {0x70917256, NULL}, /* USR9170 - U.S. Robotics 56K FAX INT */ 532 {0x90917256, NULL}, /* USR9190 - USR 56k Voice INT */ 533 {0x0300695c, NULL}, /* WCI0003 - Fax/Voice/Modem/Speakphone/Asvd */ 534 {0x01a0896a, NULL}, /* ZTIA001 - Zoom Internal V90 Faxmodem */ 535 {0x61f7896a, NULL}, /* ZTIF761 - Zoom ComStar 33.6 */ 536 {0} 537 }; 538 539 540 541 static int 542 sio_isa_probe(device_t dev) 543 { 544 /* Check isapnp ids */ 545 if (ISA_PNP_PROBE(device_get_parent(dev), dev, sio_ids) == ENXIO) 546 return (ENXIO); 547 return (sioprobe(dev, 0, 0UL)); 548 } 549 550 int 551 sioprobe(device_t dev, int xrid, u_long rclk) 552 { 553 #if 0 554 static bool_t already_init; 555 device_t xdev; 556 #endif 557 struct com_s *com; 558 u_int divisor; 559 bool_t failures[10]; 560 int fn; 561 device_t idev; 562 Port_t iobase; 563 intrmask_t irqmap[4]; 564 intrmask_t irqs; 565 u_char mcr_image; 566 int result; 567 u_long xirq; 568 u_int flags = device_get_flags(dev); 569 int rid; 570 struct resource *port; 571 572 rid = xrid; 573 port = bus_alloc_resource(dev, SYS_RES_IOPORT, &rid, 574 0, ~0, IO_COMSIZE, RF_ACTIVE); 575 if (!port) 576 return (ENXIO); 577 578 lwkt_gettoken(&tty_token); 579 com = device_get_softc(dev); 580 com->bst = rman_get_bustag(port); 581 com->bsh = rman_get_bushandle(port); 582 if (rclk == 0) 583 rclk = DEFAULT_RCLK; 584 com->rclk = rclk; 585 586 #if 0 587 /* 588 * XXX this is broken - when we are first called, there are no 589 * previously configured IO ports. We could hard code 590 * 0x3f8, 0x2f8, 0x3e8, 0x2e8 etc but that's probably worse. 591 * This code has been doing nothing since the conversion since 592 * "count" is zero the first time around. 593 */ 594 if (!already_init) { 595 /* 596 * Turn off MCR_IENABLE for all likely serial ports. An unused 597 * port with its MCR_IENABLE gate open will inhibit interrupts 598 * from any used port that shares the interrupt vector. 599 * XXX the gate enable is elsewhere for some multiports. 600 */ 601 device_t *devs; 602 int count, i, xioport; 603 604 devclass_get_devices(sio_devclass, &devs, &count); 605 for (i = 0; i < count; i++) { 606 xdev = devs[i]; 607 if (device_is_enabled(xdev) && 608 bus_get_resource(xdev, SYS_RES_IOPORT, 0, &xioport, 609 NULL) == 0) 610 outb(xioport + com_mcr, 0); 611 } 612 kfree(devs, M_TEMP); 613 already_init = TRUE; 614 } 615 #endif 616 617 if (COM_LLCONSOLE(flags)) { 618 kprintf("sio%d: reserved for low-level i/o\n", 619 device_get_unit(dev)); 620 bus_release_resource(dev, SYS_RES_IOPORT, rid, port); 621 lwkt_reltoken(&tty_token); 622 return (ENXIO); 623 } 624 625 /* 626 * If the device is on a multiport card and has an AST/4 627 * compatible interrupt control register, initialize this 628 * register and prepare to leave MCR_IENABLE clear in the mcr. 629 * Otherwise, prepare to set MCR_IENABLE in the mcr. 630 * Point idev to the device struct giving the correct id_irq. 631 * This is the struct for the master device if there is one. 632 */ 633 idev = dev; 634 mcr_image = MCR_IENABLE; 635 #ifdef COM_MULTIPORT 636 if (COM_ISMULTIPORT(flags)) { 637 Port_t xiobase; 638 u_long io; 639 640 idev = devclass_get_device(sio_devclass, COM_MPMASTER(flags)); 641 if (idev == NULL) { 642 kprintf("sio%d: master device %d not configured\n", 643 device_get_unit(dev), COM_MPMASTER(flags)); 644 idev = dev; 645 } 646 if (!COM_NOTAST4(flags)) { 647 if (bus_get_resource(idev, SYS_RES_IOPORT, 0, &io, 648 NULL) == 0) { 649 xiobase = io; 650 if (bus_get_resource(idev, SYS_RES_IRQ, 0, 651 NULL, NULL) == 0) 652 outb(xiobase + com_scr, 0x80); 653 else 654 outb(xiobase + com_scr, 0); 655 } 656 mcr_image = 0; 657 } 658 } 659 #endif /* COM_MULTIPORT */ 660 if (bus_get_resource(idev, SYS_RES_IRQ, 0, NULL, NULL) != 0) 661 mcr_image = 0; 662 663 bzero(failures, sizeof failures); 664 iobase = rman_get_start(port); 665 666 /* 667 * We don't want to get actual interrupts, just masked ones. 668 * Interrupts from this line should already be masked in the ICU, 669 * but mask them in the processor as well in case there are some 670 * (misconfigured) shared interrupts. 671 */ 672 com_lock(); 673 /* EXTRA DELAY? */ 674 675 /* 676 * For the TI16754 chips, set prescaler to 1 (4 is often the 677 * default after-reset value) as otherwise it's impossible to 678 * get highest baudrates. 679 */ 680 if (COM_TI16754(flags)) { 681 u_char cfcr, efr; 682 683 cfcr = sio_getreg(com, com_cfcr); 684 sio_setreg(com, com_cfcr, CFCR_EFR_ENABLE); 685 efr = sio_getreg(com, com_efr); 686 /* Unlock extended features to turn off prescaler. */ 687 sio_setreg(com, com_efr, efr | EFR_EFE); 688 /* Disable EFR. */ 689 sio_setreg(com, com_cfcr, (cfcr != CFCR_EFR_ENABLE) ? cfcr : 0); 690 /* Turn off prescaler. */ 691 sio_setreg(com, com_mcr, 692 sio_getreg(com, com_mcr) & ~MCR_PRESCALE); 693 sio_setreg(com, com_cfcr, CFCR_EFR_ENABLE); 694 sio_setreg(com, com_efr, efr); 695 sio_setreg(com, com_cfcr, cfcr); 696 } 697 698 /* 699 * Initialize the speed and the word size and wait long enough to 700 * drain the maximum of 16 bytes of junk in device output queues. 701 * The speed is undefined after a master reset and must be set 702 * before relying on anything related to output. There may be 703 * junk after a (very fast) soft reboot and (apparently) after 704 * master reset. 705 * XXX what about the UART bug avoided by waiting in comparam()? 706 * We don't want to to wait long enough to drain at 2 bps. 707 */ 708 if (iobase == siocniobase) { 709 DELAY((16 + 1) * 1000000 / (comdefaultrate / 10)); 710 } else { 711 sio_setreg(com, com_cfcr, CFCR_DLAB | CFCR_8BITS); 712 divisor = siodivisor(rclk, SIO_TEST_SPEED); 713 sio_setreg(com, com_dlbl, divisor & 0xff); 714 sio_setreg(com, com_dlbh, divisor >> 8); 715 sio_setreg(com, com_cfcr, CFCR_8BITS); 716 DELAY((16 + 1) * 1000000 / (SIO_TEST_SPEED / 10)); 717 } 718 719 /* 720 * Make sure we can drain the receiver. If we can't, the serial 721 * port may not exist. 722 */ 723 for (fn = 0; fn < 256; ++fn) { 724 if ((sio_getreg(com, com_lsr) & LSR_RXRDY) == 0) 725 break; 726 (void)sio_getreg(com, com_data); 727 } 728 if (fn == 256) { 729 /* 730 * Serial port might be probed but not exist, disable 731 * if so. Clear console flags if the serial port does 732 * not exist. This is very common for sio0 and sio1 733 * now and avoids unnecessary user confusion (user does 734 * not have to clear the sio0 console flag if sio0 does 735 * not exist and the user wants the console on another 736 * sio). 737 */ 738 com_unlock(); 739 lwkt_reltoken(&tty_token); 740 kprintf("sio%d: can't drain, serial port might " 741 "not exist, disabling\n", device_get_unit(dev)); 742 com->flags &= ~0x30; 743 744 return (ENXIO); 745 } 746 747 /* 748 * Enable the interrupt gate and disable device interupts. This 749 * should leave the device driving the interrupt line low and 750 * guarantee an edge trigger if an interrupt can be generated. 751 */ 752 /* EXTRA DELAY? */ 753 sio_setreg(com, com_mcr, mcr_image); 754 sio_setreg(com, com_ier, 0); 755 DELAY(1000); /* XXX */ 756 irqmap[0] = isa_irq_pending(); 757 758 /* 759 * Attempt to set loopback mode so that we can send a null byte 760 * without annoying any external device. 761 */ 762 /* EXTRA DELAY? */ 763 sio_setreg(com, com_mcr, mcr_image | MCR_LOOPBACK); 764 765 /* 766 * Attempt to generate an output interrupt. On 8250's, setting 767 * IER_ETXRDY generates an interrupt independent of the current 768 * setting and independent of whether the THR is empty. On 16450's, 769 * setting IER_ETXRDY generates an interrupt independent of the 770 * current setting. On 16550A's, setting IER_ETXRDY only 771 * generates an interrupt when IER_ETXRDY is not already set. 772 */ 773 sio_setreg(com, com_ier, IER_ETXRDY); 774 775 /* 776 * On some 16x50 incompatibles, setting IER_ETXRDY doesn't generate 777 * an interrupt. They'd better generate one for actually doing 778 * output. Loopback may be broken on the same incompatibles but 779 * it's unlikely to do more than allow the null byte out. 780 */ 781 sio_setreg(com, com_data, 0); 782 DELAY((1 + 2) * 1000000 / (SIO_TEST_SPEED / 10)); 783 784 /* 785 * Turn off loopback mode so that the interrupt gate works again 786 * (MCR_IENABLE was hidden). This should leave the device driving 787 * an interrupt line high. It doesn't matter if the interrupt 788 * line oscillates while we are not looking at it, since interrupts 789 * are disabled. 790 */ 791 /* EXTRA DELAY? */ 792 sio_setreg(com, com_mcr, mcr_image); 793 794 /* 795 * Some pcmcia cards have the "TXRDY bug", so we check everyone 796 * for IIR_TXRDY implementation ( Palido 321s, DC-1S... ) 797 */ 798 if (COM_NOPROBE(flags)) { 799 /* Reading IIR register twice */ 800 for (fn = 0; fn < 2; fn ++) { 801 DELAY(10000); 802 failures[6] = sio_getreg(com, com_iir); 803 } 804 /* Check IIR_TXRDY clear ? */ 805 result = 0; 806 if (failures[6] & IIR_TXRDY) { 807 /* Nop, Double check with clearing IER */ 808 sio_setreg(com, com_ier, 0); 809 if (sio_getreg(com, com_iir) & IIR_NOPEND) { 810 /* Ok. we're familia this gang */ 811 SET_FLAG(dev, COM_C_IIR_TXRDYBUG); 812 } else { 813 /* Unknown, Just omit this chip.. XXX */ 814 result = ENXIO; 815 sio_setreg(com, com_mcr, 0); 816 } 817 } else { 818 /* OK. this is well-known guys */ 819 CLR_FLAG(dev, COM_C_IIR_TXRDYBUG); 820 } 821 sio_setreg(com, com_ier, 0); 822 sio_setreg(com, com_cfcr, CFCR_8BITS); 823 com_unlock(); 824 bus_release_resource(dev, SYS_RES_IOPORT, rid, port); 825 lwkt_reltoken(&tty_token); 826 return (iobase == siocniobase ? 0 : result); 827 } 828 829 /* 830 * Check that 831 * o the CFCR, IER and MCR in UART hold the values written to them 832 * (the values happen to be all distinct - this is good for 833 * avoiding false positive tests from bus echoes). 834 * o an output interrupt is generated and its vector is correct. 835 * o the interrupt goes away when the IIR in the UART is read. 836 */ 837 /* EXTRA DELAY? */ 838 failures[0] = sio_getreg(com, com_cfcr) - CFCR_8BITS; 839 failures[1] = sio_getreg(com, com_ier) - IER_ETXRDY; 840 failures[2] = sio_getreg(com, com_mcr) - mcr_image; 841 DELAY(10000); /* Some internal modems need this time */ 842 irqmap[1] = isa_irq_pending(); 843 failures[4] = (sio_getreg(com, com_iir) & IIR_IMASK) - IIR_TXRDY; 844 DELAY(1000); /* XXX */ 845 irqmap[2] = isa_irq_pending(); 846 failures[6] = (sio_getreg(com, com_iir) & IIR_IMASK) - IIR_NOPEND; 847 848 /* 849 * Turn off all device interrupts and check that they go off properly. 850 * Leave MCR_IENABLE alone. For ports without a master port, it gates 851 * the OUT2 output of the UART to 852 * the ICU input. Closing the gate would give a floating ICU input 853 * (unless there is another device driving it) and spurious interrupts. 854 * (On the system that this was first tested on, the input floats high 855 * and gives a (masked) interrupt as soon as the gate is closed.) 856 */ 857 sio_setreg(com, com_ier, 0); 858 sio_setreg(com, com_cfcr, CFCR_8BITS); /* dummy to avoid bus echo */ 859 failures[7] = sio_getreg(com, com_ier); 860 DELAY(1000); /* XXX */ 861 irqmap[3] = isa_irq_pending(); 862 failures[9] = (sio_getreg(com, com_iir) & IIR_IMASK) - IIR_NOPEND; 863 864 com_unlock(); 865 866 irqs = irqmap[1] & ~irqmap[0]; 867 if (bus_get_resource(idev, SYS_RES_IRQ, 0, &xirq, NULL) == 0 && 868 ((1 << xirq) & irqs) == 0) 869 kprintf( 870 "sio%d: configured irq %ld not in bitmap of probed irqs %#x\n", 871 device_get_unit(dev), xirq, irqs); 872 if (bootverbose) 873 kprintf("sio%d: irq maps: %#x %#x %#x %#x\n", 874 device_get_unit(dev), 875 irqmap[0], irqmap[1], irqmap[2], irqmap[3]); 876 877 result = 0; 878 for (fn = 0; fn < sizeof failures; ++fn) 879 if (failures[fn]) { 880 sio_setreg(com, com_mcr, 0); 881 result = ENXIO; 882 if (bootverbose) { 883 kprintf("sio%d: probe failed test(s):", 884 device_get_unit(dev)); 885 for (fn = 0; fn < sizeof failures; ++fn) 886 if (failures[fn]) 887 kprintf(" %d", fn); 888 kprintf("\n"); 889 } 890 break; 891 } 892 bus_release_resource(dev, SYS_RES_IOPORT, rid, port); 893 lwkt_reltoken(&tty_token); 894 return (iobase == siocniobase ? 0 : result); 895 } 896 897 #ifdef COM_ESP 898 static int 899 espattach(struct com_s *com, Port_t esp_port) 900 { 901 u_char dips; 902 u_char val; 903 904 /* 905 * Check the ESP-specific I/O port to see if we're an ESP 906 * card. If not, return failure immediately. 907 */ 908 if ((inb(esp_port) & 0xf3) == 0) { 909 kprintf(" port 0x%x is not an ESP board?\n", esp_port); 910 return (0); 911 } 912 913 lwkt_gettoken(&tty_token); 914 /* 915 * We've got something that claims to be a Hayes ESP card. 916 * Let's hope so. 917 */ 918 919 /* Get the dip-switch configuration */ 920 outb(esp_port + ESP_CMD1, ESP_GETDIPS); 921 dips = inb(esp_port + ESP_STATUS1); 922 923 /* 924 * Bits 0,1 of dips say which COM port we are. 925 */ 926 if (rman_get_start(com->ioportres) == likely_com_ports[dips & 0x03]) 927 kprintf(" : ESP"); 928 else { 929 kprintf(" esp_port has com %d\n", dips & 0x03); 930 lwkt_reltoken(&tty_token); 931 return (0); 932 } 933 934 /* 935 * Check for ESP version 2.0 or later: bits 4,5,6 = 010. 936 */ 937 outb(esp_port + ESP_CMD1, ESP_GETTEST); 938 val = inb(esp_port + ESP_STATUS1); /* clear reg 1 */ 939 val = inb(esp_port + ESP_STATUS2); 940 if ((val & 0x70) < 0x20) { 941 kprintf("-old (%o)", val & 0x70); 942 lwkt_reltoken(&tty_token); 943 return (0); 944 } 945 946 /* 947 * Check for ability to emulate 16550: bit 7 == 1 948 */ 949 if ((dips & 0x80) == 0) { 950 kprintf(" slave"); 951 lwkt_reltoken(&tty_token); 952 return (0); 953 } 954 955 /* 956 * Okay, we seem to be a Hayes ESP card. Whee. 957 */ 958 com->esp = TRUE; 959 com->esp_port = esp_port; 960 lwkt_reltoken(&tty_token); 961 return (1); 962 } 963 #endif /* COM_ESP */ 964 965 static int 966 sio_isa_attach(device_t dev) 967 { 968 return (sioattach(dev, 0, 0UL)); 969 } 970 971 int 972 sioattach(device_t dev, int xrid, u_long rclk) 973 { 974 struct com_s *com; 975 #ifdef COM_ESP 976 Port_t *espp; 977 #endif 978 Port_t iobase; 979 int minorbase; 980 int unit; 981 u_int flags; 982 int rid; 983 struct resource *port; 984 int ret; 985 char tbuf[MAKEDEV_MINNBUF]; 986 char *unit_in_base32; 987 static int did_init; 988 989 lwkt_gettoken(&tty_token); 990 if (did_init == 0) { 991 did_init = 1; 992 callout_init_mp(&sio_timeout_handle); 993 } 994 995 rid = xrid; 996 port = bus_alloc_resource(dev, SYS_RES_IOPORT, &rid, 997 0, ~0, IO_COMSIZE, RF_ACTIVE); 998 if (!port) { 999 lwkt_reltoken(&tty_token); 1000 return (ENXIO); 1001 } 1002 1003 iobase = rman_get_start(port); 1004 unit = device_get_unit(dev); 1005 com = device_get_softc(dev); 1006 flags = device_get_flags(dev); 1007 1008 if (unit >= sio_numunits) 1009 sio_numunits = unit + 1; 1010 /* 1011 * sioprobe() has initialized the device registers as follows: 1012 * o cfcr = CFCR_8BITS. 1013 * It is most important that CFCR_DLAB is off, so that the 1014 * data port is not hidden when we enable interrupts. 1015 * o ier = 0. 1016 * Interrupts are only enabled when the line is open. 1017 * o mcr = MCR_IENABLE, or 0 if the port has AST/4 compatible 1018 * interrupt control register or the config specifies no irq. 1019 * Keeping MCR_DTR and MCR_RTS off might stop the external 1020 * device from sending before we are ready. 1021 */ 1022 bzero(com, sizeof *com); 1023 com->unit = unit; 1024 com->ioportres = port; 1025 com->bst = rman_get_bustag(port); 1026 com->bsh = rman_get_bushandle(port); 1027 com->cfcr_image = CFCR_8BITS; 1028 com->dtr_wait = 3 * hz; 1029 callout_init_mp(&com->dtr_ch); 1030 callout_init_mp(&com->busy_ch); 1031 com->loses_outints = COM_LOSESOUTINTS(flags) != 0; 1032 com->no_irq = bus_get_resource(dev, SYS_RES_IRQ, 0, NULL, NULL) != 0; 1033 com->tx_fifo_size = 1; 1034 com->obufs[0].l_head = com->obuf1; 1035 com->obufs[1].l_head = com->obuf2; 1036 1037 com->data_port = iobase + com_data; 1038 com->int_id_port = iobase + com_iir; 1039 com->modem_ctl_port = iobase + com_mcr; 1040 com->mcr_image = inb(com->modem_ctl_port); 1041 com->line_status_port = iobase + com_lsr; 1042 com->modem_status_port = iobase + com_msr; 1043 com->intr_ctl_port = iobase + com_ier; 1044 1045 if (rclk == 0) 1046 rclk = DEFAULT_RCLK; 1047 com->rclk = rclk; 1048 1049 /* 1050 * We don't use all the flags from <sys/ttydefaults.h> since they 1051 * are only relevant for logins. It's important to have echo off 1052 * initially so that the line doesn't start blathering before the 1053 * echo flag can be turned off. 1054 */ 1055 com->it_in.c_iflag = 0; 1056 com->it_in.c_oflag = 0; 1057 com->it_in.c_cflag = TTYDEF_CFLAG; 1058 com->it_in.c_lflag = 0; 1059 if (unit == comconsole) { 1060 com->it_in.c_iflag = TTYDEF_IFLAG; 1061 com->it_in.c_oflag = TTYDEF_OFLAG; 1062 com->it_in.c_cflag = TTYDEF_CFLAG | CLOCAL; 1063 com->it_in.c_lflag = TTYDEF_LFLAG; 1064 com->lt_out.c_cflag = com->lt_in.c_cflag = CLOCAL; 1065 com->lt_out.c_ispeed = com->lt_out.c_ospeed = 1066 com->lt_in.c_ispeed = com->lt_in.c_ospeed = 1067 com->it_in.c_ispeed = com->it_in.c_ospeed = comdefaultrate; 1068 } else 1069 com->it_in.c_ispeed = com->it_in.c_ospeed = TTYDEF_SPEED; 1070 if (siosetwater(com, com->it_in.c_ispeed) != 0) { 1071 /* 1072 * Leave i/o resources allocated if this is a `cn'-level 1073 * console, so that other devices can't snarf them. 1074 */ 1075 if (iobase != siocniobase) 1076 bus_release_resource(dev, SYS_RES_IOPORT, rid, port); 1077 lwkt_reltoken(&tty_token); 1078 return (ENOMEM); 1079 } 1080 termioschars(&com->it_in); 1081 com->it_out = com->it_in; 1082 1083 /* attempt to determine UART type */ 1084 kprintf("sio%d: type", unit); 1085 1086 1087 #ifdef COM_MULTIPORT 1088 if (!COM_ISMULTIPORT(flags) && !COM_IIR_TXRDYBUG(flags)) 1089 #else 1090 if (!COM_IIR_TXRDYBUG(flags)) 1091 #endif 1092 { 1093 u_char scr; 1094 u_char scr1; 1095 u_char scr2; 1096 1097 scr = sio_getreg(com, com_scr); 1098 sio_setreg(com, com_scr, 0xa5); 1099 scr1 = sio_getreg(com, com_scr); 1100 sio_setreg(com, com_scr, 0x5a); 1101 scr2 = sio_getreg(com, com_scr); 1102 sio_setreg(com, com_scr, scr); 1103 if (scr1 != 0xa5 || scr2 != 0x5a) { 1104 kprintf(" 8250"); 1105 goto determined_type; 1106 } 1107 } 1108 sio_setreg(com, com_fifo, FIFO_ENABLE | FIFO_RX_HIGH); 1109 DELAY(100); 1110 com->st16650a = 0; 1111 switch (inb(com->int_id_port) & IIR_FIFO_MASK) { 1112 case FIFO_RX_LOW: 1113 kprintf(" 16450"); 1114 break; 1115 case FIFO_RX_MEDL: 1116 kprintf(" 16450?"); 1117 break; 1118 case FIFO_RX_MEDH: 1119 kprintf(" 16550?"); 1120 break; 1121 case FIFO_RX_HIGH: 1122 if (COM_NOFIFO(flags)) { 1123 kprintf(" 16550A fifo disabled"); 1124 } else { 1125 com->hasfifo = TRUE; 1126 if (COM_ST16650A(flags)) { 1127 com->st16650a = 1; 1128 com->tx_fifo_size = 32; 1129 kprintf(" ST16650A"); 1130 } else if (COM_TI16754(flags)) { 1131 com->tx_fifo_size = 64; 1132 kprintf(" TI16754"); 1133 } else { 1134 com->tx_fifo_size = COM_FIFOSIZE(flags); 1135 kprintf(" 16550A"); 1136 } 1137 } 1138 #ifdef COM_ESP 1139 for (espp = likely_esp_ports; *espp != 0; espp++) 1140 if (espattach(com, *espp)) { 1141 com->tx_fifo_size = 1024; 1142 break; 1143 } 1144 #endif 1145 if (!com->st16650a && !COM_TI16754(flags)) { 1146 if (!com->tx_fifo_size) 1147 com->tx_fifo_size = 16; 1148 else 1149 kprintf(" lookalike with %d bytes FIFO", 1150 com->tx_fifo_size); 1151 } 1152 1153 break; 1154 } 1155 #ifdef COM_ESP 1156 if (com->esp) { 1157 /* 1158 * Set 16550 compatibility mode. 1159 * We don't use the ESP_MODE_SCALE bit to increase the 1160 * fifo trigger levels because we can't handle large 1161 * bursts of input. 1162 * XXX flow control should be set in comparam(), not here. 1163 */ 1164 outb(com->esp_port + ESP_CMD1, ESP_SETMODE); 1165 outb(com->esp_port + ESP_CMD2, ESP_MODE_RTS | ESP_MODE_FIFO); 1166 1167 /* Set RTS/CTS flow control. */ 1168 outb(com->esp_port + ESP_CMD1, ESP_SETFLOWTYPE); 1169 outb(com->esp_port + ESP_CMD2, ESP_FLOW_RTS); 1170 outb(com->esp_port + ESP_CMD2, ESP_FLOW_CTS); 1171 1172 /* Set flow-control levels. */ 1173 outb(com->esp_port + ESP_CMD1, ESP_SETRXFLOW); 1174 outb(com->esp_port + ESP_CMD2, HIBYTE(768)); 1175 outb(com->esp_port + ESP_CMD2, LOBYTE(768)); 1176 outb(com->esp_port + ESP_CMD2, HIBYTE(512)); 1177 outb(com->esp_port + ESP_CMD2, LOBYTE(512)); 1178 } 1179 #endif /* COM_ESP */ 1180 sio_setreg(com, com_fifo, 0); 1181 determined_type: ; 1182 1183 #ifdef COM_MULTIPORT 1184 if (COM_ISMULTIPORT(flags)) { 1185 device_t masterdev; 1186 1187 com->multiport = TRUE; 1188 kprintf(" (multiport"); 1189 if (unit == COM_MPMASTER(flags)) 1190 kprintf(" master"); 1191 kprintf(")"); 1192 masterdev = devclass_get_device(sio_devclass, 1193 COM_MPMASTER(flags)); 1194 com->no_irq = (masterdev == NULL || bus_get_resource(masterdev, 1195 SYS_RES_IRQ, 0, NULL, NULL) != 0); 1196 } 1197 #endif /* COM_MULTIPORT */ 1198 if (unit == comconsole) 1199 kprintf(", console"); 1200 if (COM_IIR_TXRDYBUG(flags)) 1201 kprintf(" with a bogus IIR_TXRDY register"); 1202 kprintf("\n"); 1203 1204 if (!sio_registered) { 1205 register_swi_mp(SWI_TTY, siopoll, NULL, 1206 "swi_siopoll", NULL, -1); 1207 sio_registered = TRUE; 1208 } 1209 minorbase = UNIT_TO_MINOR(unit); 1210 unit_in_base32 = makedev_unit_b32(tbuf, unit); 1211 make_dev(&sio_ops, minorbase, 1212 UID_ROOT, GID_WHEEL, 0600, "ttyd%s", unit_in_base32); 1213 make_dev(&sio_ops, minorbase | CONTROL_INIT_STATE, 1214 UID_ROOT, GID_WHEEL, 0600, "ttyid%s", unit_in_base32); 1215 make_dev(&sio_ops, minorbase | CONTROL_LOCK_STATE, 1216 UID_ROOT, GID_WHEEL, 0600, "ttyld%s", unit_in_base32); 1217 make_dev(&sio_ops, minorbase | CALLOUT_MASK, 1218 UID_UUCP, GID_DIALER, 0660, "cuaa%s", unit_in_base32); 1219 make_dev(&sio_ops, minorbase | CALLOUT_MASK | CONTROL_INIT_STATE, 1220 UID_UUCP, GID_DIALER, 0660, "cuaia%s", unit_in_base32); 1221 make_dev(&sio_ops, minorbase | CALLOUT_MASK | CONTROL_LOCK_STATE, 1222 UID_UUCP, GID_DIALER, 0660, "cuala%s", unit_in_base32); 1223 com->flags = flags; 1224 com->pps.ppscap = PPS_CAPTUREASSERT | PPS_CAPTURECLEAR; 1225 pps_init(&com->pps); 1226 1227 rid = 0; 1228 com->irqres = bus_alloc_resource(dev, SYS_RES_IRQ, &rid, 0ul, ~0ul, 1, 1229 RF_ACTIVE); 1230 if (com->irqres) { 1231 ret = BUS_SETUP_INTR(device_get_parent(dev), dev, 1232 com->irqres, INTR_MPSAFE, siointr, com, 1233 &com->cookie, NULL, NULL); 1234 if (ret) 1235 device_printf(dev, "could not activate interrupt\n"); 1236 #if defined(DDB) 1237 /* 1238 * Enable interrupts for early break-to-debugger support 1239 * on the console. 1240 */ 1241 if (ret == 0 && unit == comconsole && 1242 (break_to_debugger || alt_break_to_debugger)) { 1243 inb(siocniobase + com_data); 1244 outb(siocniobase + com_ier, 1245 IER_ERXRDY | IER_ERLS | IER_EMSC); 1246 } 1247 #endif 1248 } 1249 1250 lwkt_reltoken(&tty_token); 1251 return (0); 1252 } 1253 1254 static int 1255 sioopen(struct dev_open_args *ap) 1256 { 1257 cdev_t dev = ap->a_head.a_dev; 1258 struct com_s *com; 1259 int error; 1260 int mynor; 1261 struct tty *tp; 1262 int unit; 1263 1264 mynor = minor(dev); 1265 unit = MINOR_TO_UNIT(mynor); 1266 com = com_addr(unit); 1267 if (com == NULL) 1268 return (ENXIO); 1269 if (com->gone) 1270 return (ENXIO); 1271 if (mynor & CONTROL_MASK) 1272 return (0); 1273 lwkt_gettoken(&tty_token); 1274 tp = dev->si_tty = com->tp = ttymalloc(com->tp); 1275 crit_enter(); 1276 /* 1277 * We jump to this label after all non-interrupted sleeps to pick 1278 * up any changes of the device state. 1279 */ 1280 open_top: 1281 while (com->state & CS_DTR_OFF) { 1282 error = tsleep(&com->dtr_wait, PCATCH, "siodtr", 0); 1283 if (com_addr(unit) == NULL) { 1284 crit_exit(); 1285 lwkt_reltoken(&tty_token); 1286 return (ENXIO); 1287 } 1288 if (error != 0 || com->gone) 1289 goto out; 1290 } 1291 if (tp->t_state & TS_ISOPEN) { 1292 /* 1293 * The device is open, so everything has been initialized. 1294 * Handle conflicts. 1295 */ 1296 if (mynor & CALLOUT_MASK) { 1297 if (!com->active_out) { 1298 error = EBUSY; 1299 goto out; 1300 } 1301 } else { 1302 if (com->active_out) { 1303 if (ap->a_oflags & O_NONBLOCK) { 1304 error = EBUSY; 1305 goto out; 1306 } 1307 error = tsleep(&com->active_out, 1308 PCATCH, "siobi", 0); 1309 if (com_addr(unit) == NULL) { 1310 crit_exit(); 1311 lwkt_reltoken(&tty_token); 1312 return (ENXIO); 1313 } 1314 if (error != 0 || com->gone) 1315 goto out; 1316 goto open_top; 1317 } 1318 } 1319 if (tp->t_state & TS_XCLUDE && priv_check_cred(ap->a_cred, PRIV_ROOT, 0)) { 1320 error = EBUSY; 1321 goto out; 1322 } 1323 } else { 1324 /* 1325 * The device isn't open, so there are no conflicts. 1326 * Initialize it. Initialization is done twice in many 1327 * cases: to preempt sleeping callin opens if we are 1328 * callout, and to complete a callin open after DCD rises. 1329 */ 1330 tp->t_oproc = comstart; 1331 tp->t_param = comparam; 1332 tp->t_stop = comstop; 1333 tp->t_dev = dev; 1334 tp->t_termios = mynor & CALLOUT_MASK 1335 ? com->it_out : com->it_in; 1336 (void)commctl(com, TIOCM_DTR | TIOCM_RTS, DMSET); 1337 com->poll = com->no_irq; 1338 com->poll_output = com->loses_outints; 1339 ++com->wopeners; 1340 error = comparam(tp, &tp->t_termios); 1341 --com->wopeners; 1342 if (error != 0) 1343 goto out; 1344 /* 1345 * XXX we should goto open_top if comparam() slept. 1346 */ 1347 if (com->hasfifo) { 1348 /* 1349 * (Re)enable and drain fifos. 1350 * 1351 * Certain SMC chips cause problems if the fifos 1352 * are enabled while input is ready. Turn off the 1353 * fifo if necessary to clear the input. We test 1354 * the input ready bit after enabling the fifos 1355 * since we've already enabled them in comparam() 1356 * and to handle races between enabling and fresh 1357 * input. 1358 */ 1359 while (TRUE) { 1360 sio_setreg(com, com_fifo, 1361 FIFO_RCV_RST | FIFO_XMT_RST 1362 | com->fifo_image); 1363 /* 1364 * XXX the delays are for superstitious 1365 * historical reasons. It must be less than 1366 * the character time at the maximum 1367 * supported speed (87 usec at 115200 bps 1368 * 8N1). Otherwise we might loop endlessly 1369 * if data is streaming in. We used to use 1370 * delays of 100. That usually worked 1371 * because DELAY(100) used to usually delay 1372 * for about 85 usec instead of 100. 1373 */ 1374 DELAY(50); 1375 if (!(inb(com->line_status_port) & LSR_RXRDY)) 1376 break; 1377 sio_setreg(com, com_fifo, 0); 1378 DELAY(50); 1379 (void) inb(com->data_port); 1380 } 1381 } 1382 1383 com_lock(); 1384 (void) inb(com->line_status_port); 1385 (void) inb(com->data_port); 1386 com->prev_modem_status = com->last_modem_status 1387 = inb(com->modem_status_port); 1388 if (COM_IIR_TXRDYBUG(com->flags)) { 1389 outb(com->intr_ctl_port, IER_ERXRDY | IER_ERLS 1390 | IER_EMSC); 1391 } else { 1392 outb(com->intr_ctl_port, IER_ERXRDY | IER_ETXRDY 1393 | IER_ERLS | IER_EMSC); 1394 } 1395 com_unlock(); 1396 /* 1397 * Handle initial DCD. Callout devices get a fake initial 1398 * DCD (trapdoor DCD). If we are callout, then any sleeping 1399 * callin opens get woken up and resume sleeping on "siobi" 1400 * instead of "siodcd". 1401 */ 1402 /* 1403 * XXX `mynor & CALLOUT_MASK' should be 1404 * `tp->t_cflag & (SOFT_CARRIER | TRAPDOOR_CARRIER) where 1405 * TRAPDOOR_CARRIER is the default initial state for callout 1406 * devices and SOFT_CARRIER is like CLOCAL except it hides 1407 * the true carrier. 1408 */ 1409 if (com->prev_modem_status & MSR_DCD || mynor & CALLOUT_MASK) 1410 (*linesw[tp->t_line].l_modem)(tp, 1); 1411 } 1412 /* 1413 * Wait for DCD if necessary. 1414 */ 1415 if (!(tp->t_state & TS_CARR_ON) && !(mynor & CALLOUT_MASK) 1416 && !(tp->t_cflag & CLOCAL) && !(ap->a_oflags & O_NONBLOCK)) { 1417 ++com->wopeners; 1418 error = tsleep(TSA_CARR_ON(tp), PCATCH, "siodcd", 0); 1419 if (com_addr(unit) == NULL) { 1420 crit_exit(); 1421 lwkt_reltoken(&tty_token); 1422 return (ENXIO); 1423 } 1424 --com->wopeners; 1425 if (error != 0 || com->gone) 1426 goto out; 1427 goto open_top; 1428 } 1429 error = (*linesw[tp->t_line].l_open)(dev, tp); 1430 disc_optim(tp, &tp->t_termios, com); 1431 if (tp->t_state & TS_ISOPEN && mynor & CALLOUT_MASK) 1432 com->active_out = TRUE; 1433 siosettimeout(); 1434 out: 1435 crit_exit(); 1436 if (!(tp->t_state & TS_ISOPEN) && com->wopeners == 0) 1437 comhardclose(com); 1438 lwkt_reltoken(&tty_token); 1439 return (error); 1440 } 1441 1442 static int 1443 sioclose(struct dev_close_args *ap) 1444 { 1445 cdev_t dev = ap->a_head.a_dev; 1446 struct com_s *com; 1447 int mynor; 1448 struct tty *tp; 1449 1450 mynor = minor(dev); 1451 if (mynor & CONTROL_MASK) 1452 return (0); 1453 lwkt_gettoken(&tty_token); 1454 com = com_addr(MINOR_TO_UNIT(mynor)); 1455 if (com == NULL) { 1456 lwkt_reltoken(&tty_token); 1457 return (ENODEV); 1458 } 1459 tp = com->tp; 1460 crit_enter(); 1461 (*linesw[tp->t_line].l_close)(tp, ap->a_fflag); 1462 disc_optim(tp, &tp->t_termios, com); 1463 comstop(tp, FREAD | FWRITE); 1464 comhardclose(com); 1465 ttyclose(tp); 1466 siosettimeout(); 1467 crit_exit(); 1468 if (com->gone) { 1469 kprintf("sio%d: gone\n", com->unit); 1470 crit_enter(); 1471 if (com->ibuf != NULL) 1472 kfree(com->ibuf, M_DEVBUF); 1473 bzero(tp, sizeof *tp); 1474 crit_exit(); 1475 } 1476 lwkt_reltoken(&tty_token); 1477 return (0); 1478 } 1479 1480 static void 1481 comhardclose(struct com_s *com) 1482 { 1483 struct tty *tp; 1484 crit_enter(); 1485 lwkt_gettoken(&tty_token); 1486 com->poll = FALSE; 1487 com->poll_output = FALSE; 1488 com->do_timestamp = FALSE; 1489 com->do_dcd_timestamp = FALSE; 1490 com->pps.ppsparam.mode = 0; 1491 sio_setreg(com, com_cfcr, com->cfcr_image &= ~CFCR_SBREAK); 1492 tp = com->tp; 1493 1494 #if defined(DDB) 1495 /* 1496 * Leave interrupts enabled and don't clear DTR if this is the 1497 * console. This allows us to detect break-to-debugger events 1498 * while the console device is closed. 1499 */ 1500 if (com->unit != comconsole || 1501 (break_to_debugger == 0 && alt_break_to_debugger == 0)) 1502 #endif 1503 { 1504 sio_setreg(com, com_ier, 0); 1505 if (tp->t_cflag & HUPCL 1506 /* 1507 * XXX we will miss any carrier drop between here and the 1508 * next open. Perhaps we should watch DCD even when the 1509 * port is closed; it is not sufficient to check it at 1510 * the next open because it might go up and down while 1511 * we're not watching. 1512 */ 1513 || (!com->active_out 1514 && !(com->prev_modem_status & MSR_DCD) 1515 && !(com->it_in.c_cflag & CLOCAL)) 1516 || !(tp->t_state & TS_ISOPEN)) { 1517 (void)commctl(com, TIOCM_DTR, DMBIC); 1518 if (com->dtr_wait != 0 && !(com->state & CS_DTR_OFF)) { 1519 callout_reset(&com->dtr_ch, com->dtr_wait, 1520 siodtrwakeup, com); 1521 com->state |= CS_DTR_OFF; 1522 } 1523 } 1524 } 1525 if (com->hasfifo) { 1526 /* 1527 * Disable fifos so that they are off after controlled 1528 * reboots. Some BIOSes fail to detect 16550s when the 1529 * fifos are enabled. 1530 */ 1531 sio_setreg(com, com_fifo, 0); 1532 } 1533 com->active_out = FALSE; 1534 wakeup(&com->active_out); 1535 wakeup(TSA_CARR_ON(tp)); /* restart any wopeners */ 1536 lwkt_reltoken(&tty_token); 1537 crit_exit(); 1538 } 1539 1540 static int 1541 sioread(struct dev_read_args *ap) 1542 { 1543 cdev_t dev = ap->a_head.a_dev; 1544 int mynor, ret; 1545 struct com_s *com; 1546 1547 lwkt_gettoken(&tty_token); 1548 mynor = minor(dev); 1549 if (mynor & CONTROL_MASK) { 1550 lwkt_reltoken(&tty_token); 1551 return (ENODEV); 1552 } 1553 com = com_addr(MINOR_TO_UNIT(mynor)); 1554 if (com == NULL || com->gone) { 1555 lwkt_reltoken(&tty_token); 1556 return (ENODEV); 1557 } 1558 ret = ((*linesw[com->tp->t_line].l_read)(com->tp, ap->a_uio, ap->a_ioflag)); 1559 lwkt_reltoken(&tty_token); 1560 return ret; 1561 } 1562 1563 static int 1564 siowrite(struct dev_write_args *ap) 1565 { 1566 cdev_t dev = ap->a_head.a_dev; 1567 int mynor; 1568 struct com_s *com; 1569 int unit, ret; 1570 1571 lwkt_gettoken(&tty_token); 1572 mynor = minor(dev); 1573 if (mynor & CONTROL_MASK) { 1574 lwkt_reltoken(&tty_token); 1575 return (ENODEV); 1576 } 1577 1578 unit = MINOR_TO_UNIT(mynor); 1579 com = com_addr(unit); 1580 if (com == NULL || com->gone) { 1581 lwkt_reltoken(&tty_token); 1582 return (ENODEV); 1583 } 1584 /* 1585 * (XXX) We disallow virtual consoles if the physical console is 1586 * a serial port. This is in case there is a display attached that 1587 * is not the console. In that situation we don't need/want the X 1588 * server taking over the console. 1589 */ 1590 if (constty != NULL && unit == comconsole) 1591 constty = NULL; 1592 ret = ((*linesw[com->tp->t_line].l_write)(com->tp, ap->a_uio, ap->a_ioflag)); 1593 lwkt_reltoken(&tty_token); 1594 return ret; 1595 } 1596 1597 static void 1598 siobusycheck(void *chan) 1599 { 1600 struct com_s *com; 1601 1602 lwkt_gettoken(&tty_token); 1603 com = (struct com_s *)chan; 1604 1605 /* 1606 * Clear TS_BUSY if low-level output is complete. 1607 * spl locking is sufficient because siointr1() does not set CS_BUSY. 1608 * If siointr1() clears CS_BUSY after we look at it, then we'll get 1609 * called again. Reading the line status port outside of siointr1() 1610 * is safe because CS_BUSY is clear so there are no output interrupts 1611 * to lose. 1612 */ 1613 crit_enter(); 1614 if (com->state & CS_BUSY) 1615 com->extra_state &= ~CSE_BUSYCHECK; /* False alarm. */ 1616 else if ((inb(com->line_status_port) & (LSR_TSRE | LSR_TXRDY)) 1617 == (LSR_TSRE | LSR_TXRDY)) { 1618 com->tp->t_state &= ~TS_BUSY; 1619 ttwwakeup(com->tp); 1620 com->extra_state &= ~CSE_BUSYCHECK; 1621 } else { 1622 callout_reset(&com->busy_ch, hz / 100, siobusycheck, com); 1623 } 1624 crit_exit(); 1625 lwkt_reltoken(&tty_token); 1626 } 1627 1628 static u_int 1629 siodivisor(u_long rclk, speed_t speed) 1630 { 1631 long actual_speed; 1632 u_int divisor; 1633 int error; 1634 1635 if (speed == 0 || speed > ((speed_t)-1 - 1) / 8) 1636 return (0); 1637 divisor = (rclk / (8UL * speed) + 1) / 2; 1638 if (divisor == 0 || divisor >= 65536) 1639 return (0); 1640 actual_speed = rclk / (16UL * divisor); 1641 1642 /* 10 times error in percent: */ 1643 error = ((actual_speed - (long)speed) * 2000 / (long)speed + 1) / 2; 1644 1645 /* 3.0% maximum error tolerance: */ 1646 if (error < -30 || error > 30) 1647 return (0); 1648 1649 return (divisor); 1650 } 1651 1652 static void 1653 siodtrwakeup(void *chan) 1654 { 1655 struct com_s *com; 1656 1657 lwkt_gettoken(&tty_token); 1658 com = (struct com_s *)chan; 1659 com->state &= ~CS_DTR_OFF; 1660 wakeup(&com->dtr_wait); 1661 lwkt_reltoken(&tty_token); 1662 } 1663 1664 /* 1665 * NOTE: Normally called with tty_token held but might not be when 1666 * operating as the console. 1667 * 1668 * Must be called with com_lock 1669 */ 1670 static void 1671 sioinput(struct com_s *com) 1672 { 1673 u_char *buf; 1674 int incc; 1675 u_char line_status; 1676 int recv_data; 1677 struct tty *tp; 1678 1679 buf = com->ibuf; 1680 tp = com->tp; 1681 if (!(tp->t_state & TS_ISOPEN) || !(tp->t_cflag & CREAD)) { 1682 com_events -= (com->iptr - com->ibuf); 1683 com->iptr = com->ibuf; 1684 return; 1685 } 1686 if (tp->t_state & TS_CAN_BYPASS_L_RINT) { 1687 /* 1688 * Avoid the grotesquely inefficient lineswitch routine 1689 * (ttyinput) in "raw" mode. It usually takes about 450 1690 * instructions (that's without canonical processing or echo!). 1691 * slinput is reasonably fast (usually 40 instructions plus 1692 * call overhead). 1693 */ 1694 do { 1695 com_unlock(); 1696 incc = com->iptr - buf; 1697 if (tp->t_rawq.c_cc + incc > tp->t_ihiwat 1698 && (com->state & CS_RTS_IFLOW 1699 || tp->t_iflag & IXOFF) 1700 && !(tp->t_state & TS_TBLOCK)) 1701 ttyblock(tp); 1702 com->delta_error_counts[CE_TTY_BUF_OVERFLOW] 1703 += b_to_q((char *)buf, incc, &tp->t_rawq); 1704 buf += incc; 1705 tk_nin += incc; 1706 tk_rawcc += incc; 1707 tp->t_rawcc += incc; 1708 ttwakeup(tp); 1709 if (tp->t_state & TS_TTSTOP 1710 && (tp->t_iflag & IXANY 1711 || tp->t_cc[VSTART] == tp->t_cc[VSTOP])) { 1712 tp->t_state &= ~TS_TTSTOP; 1713 tp->t_lflag &= ~FLUSHO; 1714 comstart(tp); 1715 } 1716 com_lock(); 1717 } while (buf < com->iptr); 1718 } else { 1719 do { 1720 com_unlock(); 1721 line_status = buf[com->ierroff]; 1722 recv_data = *buf++; 1723 if (line_status 1724 & (LSR_BI | LSR_FE | LSR_OE | LSR_PE)) { 1725 if (line_status & LSR_BI) 1726 recv_data |= TTY_BI; 1727 if (line_status & LSR_FE) 1728 recv_data |= TTY_FE; 1729 if (line_status & LSR_OE) 1730 recv_data |= TTY_OE; 1731 if (line_status & LSR_PE) 1732 recv_data |= TTY_PE; 1733 } 1734 (*linesw[tp->t_line].l_rint)(recv_data, tp); 1735 com_lock(); 1736 } while (buf < com->iptr); 1737 } 1738 com_events -= (com->iptr - com->ibuf); 1739 com->iptr = com->ibuf; 1740 1741 /* 1742 * There is now room for another low-level buffer full of input, 1743 * so enable RTS if it is now disabled and there is room in the 1744 * high-level buffer. 1745 */ 1746 if ((com->state & CS_RTS_IFLOW) && !(com->mcr_image & MCR_RTS) && 1747 !(tp->t_state & TS_TBLOCK)) 1748 outb(com->modem_ctl_port, com->mcr_image |= MCR_RTS); 1749 } 1750 1751 static void 1752 siointr(void *arg) 1753 { 1754 lwkt_gettoken(&tty_token); 1755 #ifndef COM_MULTIPORT 1756 com_lock(); 1757 siointr1((struct com_s *) arg); 1758 com_unlock(); 1759 #else /* COM_MULTIPORT */ 1760 bool_t possibly_more_intrs; 1761 int unit; 1762 struct com_s *com; 1763 1764 /* 1765 * Loop until there is no activity on any port. This is necessary 1766 * to get an interrupt edge more than to avoid another interrupt. 1767 * If the IRQ signal is just an OR of the IRQ signals from several 1768 * devices, then the edge from one may be lost because another is 1769 * on. 1770 */ 1771 com_lock(); 1772 do { 1773 possibly_more_intrs = FALSE; 1774 for (unit = 0; unit < sio_numunits; ++unit) { 1775 com = com_addr(unit); 1776 /* 1777 * XXX com_lock(); 1778 * would it work here, or be counter-productive? 1779 */ 1780 if (com != NULL 1781 && !com->gone 1782 && (inb(com->int_id_port) & IIR_IMASK) 1783 != IIR_NOPEND) { 1784 siointr1(com); 1785 possibly_more_intrs = TRUE; 1786 } 1787 /* XXX com_unlock(); */ 1788 } 1789 } while (possibly_more_intrs); 1790 com_unlock(); 1791 #endif /* COM_MULTIPORT */ 1792 lwkt_reltoken(&tty_token); 1793 } 1794 1795 /* 1796 * Called with tty_token held and com_lock held. 1797 */ 1798 static void 1799 siointr1(struct com_s *com) 1800 { 1801 u_char line_status; 1802 u_char modem_status; 1803 u_char *ioptr; 1804 u_char recv_data; 1805 u_char int_ctl; 1806 u_char int_ctl_new; 1807 sysclock_t count; 1808 1809 int_ctl = inb(com->intr_ctl_port); 1810 int_ctl_new = int_ctl; 1811 1812 while (!com->gone) { 1813 if (com->pps.ppsparam.mode & PPS_CAPTUREBOTH) { 1814 modem_status = inb(com->modem_status_port); 1815 if ((modem_status ^ com->last_modem_status) & MSR_DCD) { 1816 count = sys_cputimer->count(); 1817 pps_event(&com->pps, count, 1818 (modem_status & MSR_DCD) ? 1819 PPS_CAPTUREASSERT : PPS_CAPTURECLEAR); 1820 } 1821 } 1822 line_status = inb(com->line_status_port); 1823 1824 /* input event? (check first to help avoid overruns) */ 1825 while (line_status & LSR_RCV_MASK) { 1826 /* break/unnattached error bits or real input? */ 1827 if (!(line_status & LSR_RXRDY)) 1828 recv_data = 0; 1829 else 1830 recv_data = inb(com->data_port); 1831 #if defined(DDB) 1832 /* 1833 * Solaris implements a new BREAK which is initiated 1834 * by a character sequence CR ~ ^b which is similar 1835 * to a familiar pattern used on Sun servers by the 1836 * Remote Console. 1837 */ 1838 #define KEY_CRTLB 2 /* ^B */ 1839 #define KEY_CR 13 /* CR '\r' */ 1840 #define KEY_TILDE 126 /* ~ */ 1841 1842 if (com->unit == comconsole && alt_break_to_debugger) { 1843 static int brk_state1 = 0, brk_state2 = 0; 1844 if (recv_data == KEY_CR) { 1845 brk_state1 = recv_data; 1846 brk_state2 = 0; 1847 } else if (brk_state1 == KEY_CR && (recv_data == KEY_TILDE || recv_data == KEY_CRTLB)) { 1848 if (recv_data == KEY_TILDE) 1849 brk_state2 = recv_data; 1850 else if (brk_state2 == KEY_TILDE && recv_data == KEY_CRTLB) { 1851 com_unlock(); 1852 breakpoint(); 1853 com_lock(); 1854 brk_state1 = brk_state2 = 0; 1855 goto cont; 1856 } else 1857 brk_state2 = 0; 1858 } else 1859 brk_state1 = 0; 1860 } 1861 #endif 1862 if (line_status & (LSR_BI | LSR_FE | LSR_PE)) { 1863 /* 1864 * Don't store BI if IGNBRK or FE/PE if IGNPAR. 1865 * Otherwise, push the work to a higher level 1866 * (to handle PARMRK) if we're bypassing. 1867 * Otherwise, convert BI/FE and PE+INPCK to 0. 1868 * 1869 * This makes bypassing work right in the 1870 * usual "raw" case (IGNBRK set, and IGNPAR 1871 * and INPCK clear). 1872 * 1873 * Note: BI together with FE/PE means just BI. 1874 */ 1875 if (line_status & LSR_BI) { 1876 #if defined(DDB) 1877 if (com->unit == comconsole && 1878 break_to_debugger) { 1879 com_unlock(); 1880 breakpoint(); 1881 com_lock(); 1882 goto cont; 1883 } 1884 #endif 1885 if (com->tp == NULL 1886 || com->tp->t_iflag & IGNBRK) 1887 goto cont; 1888 } else { 1889 if (com->tp == NULL 1890 || com->tp->t_iflag & IGNPAR) 1891 goto cont; 1892 } 1893 if (com->tp->t_state & TS_CAN_BYPASS_L_RINT 1894 && (line_status & (LSR_BI | LSR_FE) 1895 || com->tp->t_iflag & INPCK)) 1896 recv_data = 0; 1897 } 1898 ++com->bytes_in; 1899 if (com->hotchar != 0 && recv_data == com->hotchar) 1900 setsofttty(); 1901 ioptr = com->iptr; 1902 if (ioptr >= com->ibufend) 1903 CE_RECORD(com, CE_INTERRUPT_BUF_OVERFLOW); 1904 else { 1905 if (com->do_timestamp) 1906 microtime(&com->timestamp); 1907 ++com_events; 1908 schedsofttty(); 1909 #if 0 /* for testing input latency vs efficiency */ 1910 if (com->iptr - com->ibuf == 8) 1911 setsofttty(); 1912 #endif 1913 ioptr[0] = recv_data; 1914 ioptr[com->ierroff] = line_status; 1915 com->iptr = ++ioptr; 1916 if (ioptr == com->ihighwater 1917 && com->state & CS_RTS_IFLOW) 1918 outb(com->modem_ctl_port, 1919 com->mcr_image &= ~MCR_RTS); 1920 if (line_status & LSR_OE) 1921 CE_RECORD(com, CE_OVERRUN); 1922 } 1923 cont: 1924 /* 1925 * "& 0x7F" is to avoid the gcc-1.40 generating a slow 1926 * jump from the top of the loop to here 1927 */ 1928 line_status = inb(com->line_status_port) & 0x7F; 1929 } 1930 1931 /* modem status change? (always check before doing output) */ 1932 modem_status = inb(com->modem_status_port); 1933 if (modem_status != com->last_modem_status) { 1934 if (com->do_dcd_timestamp 1935 && !(com->last_modem_status & MSR_DCD) 1936 && modem_status & MSR_DCD) 1937 microtime(&com->dcd_timestamp); 1938 1939 /* 1940 * Schedule high level to handle DCD changes. Note 1941 * that we don't use the delta bits anywhere. Some 1942 * UARTs mess them up, and it's easy to remember the 1943 * previous bits and calculate the delta. 1944 */ 1945 com->last_modem_status = modem_status; 1946 if (!(com->state & CS_CHECKMSR)) { 1947 com_events += LOTS_OF_EVENTS; 1948 com->state |= CS_CHECKMSR; 1949 setsofttty(); 1950 } 1951 1952 /* handle CTS change immediately for crisp flow ctl */ 1953 if (com->state & CS_CTS_OFLOW) { 1954 if (modem_status & MSR_CTS) 1955 com->state |= CS_ODEVREADY; 1956 else 1957 com->state &= ~CS_ODEVREADY; 1958 } 1959 } 1960 1961 /* output queued and everything ready? */ 1962 if ((line_status & LSR_TXRDY) 1963 && com->state >= (CS_BUSY | CS_TTGO | CS_ODEVREADY)) { 1964 ioptr = com->obufq.l_head; 1965 if (com->tx_fifo_size > 1) { 1966 u_int ocount; 1967 1968 ocount = com->obufq.l_tail - ioptr; 1969 if (ocount > com->tx_fifo_size) 1970 ocount = com->tx_fifo_size; 1971 com->bytes_out += ocount; 1972 do 1973 outb(com->data_port, *ioptr++); 1974 while (--ocount != 0); 1975 } else { 1976 outb(com->data_port, *ioptr++); 1977 ++com->bytes_out; 1978 } 1979 com->obufq.l_head = ioptr; 1980 if (COM_IIR_TXRDYBUG(com->flags)) { 1981 int_ctl_new = int_ctl | IER_ETXRDY; 1982 } 1983 if (ioptr >= com->obufq.l_tail) { 1984 struct lbq *qp; 1985 1986 qp = com->obufq.l_next; 1987 qp->l_queued = FALSE; 1988 qp = qp->l_next; 1989 if (qp != NULL) { 1990 com->obufq.l_head = qp->l_head; 1991 com->obufq.l_tail = qp->l_tail; 1992 com->obufq.l_next = qp; 1993 } else { 1994 /* output just completed */ 1995 if (COM_IIR_TXRDYBUG(com->flags)) { 1996 int_ctl_new = int_ctl & ~IER_ETXRDY; 1997 } 1998 com->state &= ~CS_BUSY; 1999 } 2000 if (!(com->state & CS_ODONE)) { 2001 com_events += LOTS_OF_EVENTS; 2002 com->state |= CS_ODONE; 2003 setsofttty(); /* handle at high level ASAP */ 2004 } 2005 } 2006 if (COM_IIR_TXRDYBUG(com->flags) && (int_ctl != int_ctl_new)) { 2007 outb(com->intr_ctl_port, int_ctl_new); 2008 } 2009 } 2010 2011 /* finished? */ 2012 #ifdef COM_MULTIPORT 2013 return; 2014 #else 2015 if (inb(com->int_id_port) & IIR_NOPEND) 2016 return; 2017 #endif 2018 } 2019 } 2020 2021 static int 2022 sioioctl(struct dev_ioctl_args *ap) 2023 { 2024 cdev_t dev = ap->a_head.a_dev; 2025 caddr_t data = ap->a_data; 2026 struct com_s *com; 2027 int error; 2028 int mynor; 2029 struct tty *tp; 2030 2031 lwkt_gettoken(&tty_token); 2032 mynor = minor(dev); 2033 2034 com = com_addr(MINOR_TO_UNIT(mynor)); 2035 if (com == NULL || com->gone) { 2036 lwkt_reltoken(&tty_token); 2037 return (ENODEV); 2038 } 2039 if (mynor & CONTROL_MASK) { 2040 struct termios *ct; 2041 2042 switch (mynor & CONTROL_MASK) { 2043 case CONTROL_INIT_STATE: 2044 ct = mynor & CALLOUT_MASK ? &com->it_out : &com->it_in; 2045 break; 2046 case CONTROL_LOCK_STATE: 2047 ct = mynor & CALLOUT_MASK ? &com->lt_out : &com->lt_in; 2048 break; 2049 default: 2050 lwkt_reltoken(&tty_token); 2051 return (ENODEV); /* /dev/nodev */ 2052 } 2053 switch (ap->a_cmd) { 2054 case TIOCSETA: 2055 error = priv_check_cred(ap->a_cred, PRIV_ROOT, 0); 2056 if (error != 0) { 2057 lwkt_reltoken(&tty_token); 2058 return (error); 2059 } 2060 *ct = *(struct termios *)data; 2061 lwkt_reltoken(&tty_token); 2062 return (0); 2063 case TIOCGETA: 2064 *(struct termios *)data = *ct; 2065 lwkt_reltoken(&tty_token); 2066 return (0); 2067 case TIOCGETD: 2068 *(int *)data = TTYDISC; 2069 lwkt_reltoken(&tty_token); 2070 return (0); 2071 case TIOCGWINSZ: 2072 bzero(data, sizeof(struct winsize)); 2073 lwkt_reltoken(&tty_token); 2074 return (0); 2075 default: 2076 lwkt_reltoken(&tty_token); 2077 return (ENOTTY); 2078 } 2079 } 2080 tp = com->tp; 2081 if (ap->a_cmd == TIOCSETA || ap->a_cmd == TIOCSETAW || 2082 ap->a_cmd == TIOCSETAF) { 2083 int cc; 2084 struct termios *dt = (struct termios *)data; 2085 struct termios *lt = mynor & CALLOUT_MASK 2086 ? &com->lt_out : &com->lt_in; 2087 2088 dt->c_iflag = (tp->t_iflag & lt->c_iflag) 2089 | (dt->c_iflag & ~lt->c_iflag); 2090 dt->c_oflag = (tp->t_oflag & lt->c_oflag) 2091 | (dt->c_oflag & ~lt->c_oflag); 2092 dt->c_cflag = (tp->t_cflag & lt->c_cflag) 2093 | (dt->c_cflag & ~lt->c_cflag); 2094 dt->c_lflag = (tp->t_lflag & lt->c_lflag) 2095 | (dt->c_lflag & ~lt->c_lflag); 2096 for (cc = 0; cc < NCCS; ++cc) 2097 if (lt->c_cc[cc] != 0) 2098 dt->c_cc[cc] = tp->t_cc[cc]; 2099 if (lt->c_ispeed != 0) 2100 dt->c_ispeed = tp->t_ispeed; 2101 if (lt->c_ospeed != 0) 2102 dt->c_ospeed = tp->t_ospeed; 2103 } 2104 error = (*linesw[tp->t_line].l_ioctl)(tp, ap->a_cmd, data, ap->a_fflag, ap->a_cred); 2105 if (error != ENOIOCTL) { 2106 lwkt_reltoken(&tty_token); 2107 return (error); 2108 } 2109 crit_enter(); 2110 error = ttioctl(tp, ap->a_cmd, data, ap->a_fflag); 2111 disc_optim(tp, &tp->t_termios, com); 2112 if (error != ENOIOCTL) { 2113 crit_exit(); 2114 lwkt_reltoken(&tty_token); 2115 return (error); 2116 } 2117 switch (ap->a_cmd) { 2118 case TIOCSBRK: 2119 sio_setreg(com, com_cfcr, com->cfcr_image |= CFCR_SBREAK); 2120 break; 2121 case TIOCCBRK: 2122 sio_setreg(com, com_cfcr, com->cfcr_image &= ~CFCR_SBREAK); 2123 break; 2124 case TIOCSDTR: 2125 (void)commctl(com, TIOCM_DTR, DMBIS); 2126 break; 2127 case TIOCCDTR: 2128 (void)commctl(com, TIOCM_DTR, DMBIC); 2129 break; 2130 /* 2131 * XXX should disallow changing MCR_RTS if CS_RTS_IFLOW is set. The 2132 * changes get undone on the next call to comparam(). 2133 */ 2134 case TIOCMSET: 2135 (void)commctl(com, *(int *)data, DMSET); 2136 break; 2137 case TIOCMBIS: 2138 (void)commctl(com, *(int *)data, DMBIS); 2139 break; 2140 case TIOCMBIC: 2141 (void)commctl(com, *(int *)data, DMBIC); 2142 break; 2143 case TIOCMGET: 2144 *(int *)data = commctl(com, 0, DMGET); 2145 break; 2146 case TIOCMSDTRWAIT: 2147 /* must be root since the wait applies to following logins */ 2148 error = priv_check_cred(ap->a_cred, PRIV_ROOT, 0); 2149 if (error != 0) { 2150 crit_exit(); 2151 lwkt_reltoken(&tty_token); 2152 return (error); 2153 } 2154 com->dtr_wait = *(int *)data * hz / 100; 2155 break; 2156 case TIOCMGDTRWAIT: 2157 *(int *)data = com->dtr_wait * 100 / hz; 2158 break; 2159 case TIOCTIMESTAMP: 2160 com->do_timestamp = TRUE; 2161 *(struct timeval *)data = com->timestamp; 2162 break; 2163 case TIOCDCDTIMESTAMP: 2164 com->do_dcd_timestamp = TRUE; 2165 *(struct timeval *)data = com->dcd_timestamp; 2166 break; 2167 default: 2168 crit_exit(); 2169 error = pps_ioctl(ap->a_cmd, data, &com->pps); 2170 if (error == ENODEV) 2171 error = ENOTTY; 2172 lwkt_reltoken(&tty_token); 2173 return (error); 2174 } 2175 crit_exit(); 2176 lwkt_reltoken(&tty_token); 2177 return (0); 2178 } 2179 2180 static void 2181 siopoll(void *dummy, void *frame) 2182 { 2183 int unit; 2184 2185 lwkt_gettoken(&tty_token); 2186 if (com_events == 0) { 2187 lwkt_reltoken(&tty_token); 2188 return; 2189 } 2190 2191 repeat: 2192 for (unit = 0; unit < sio_numunits; ++unit) { 2193 struct com_s *com; 2194 int incc; 2195 struct tty *tp; 2196 2197 com = com_addr(unit); 2198 if (com == NULL) 2199 continue; 2200 tp = com->tp; 2201 if (tp == NULL || com->gone) { 2202 /* 2203 * Discard any events related to never-opened or 2204 * going-away devices. 2205 */ 2206 com_lock(); 2207 incc = com->iptr - com->ibuf; 2208 com->iptr = com->ibuf; 2209 if (com->state & CS_CHECKMSR) { 2210 incc += LOTS_OF_EVENTS; 2211 com->state &= ~CS_CHECKMSR; 2212 } 2213 com_events -= incc; 2214 com_unlock(); 2215 continue; 2216 } 2217 if (com->iptr != com->ibuf) { 2218 com_lock(); 2219 sioinput(com); 2220 com_unlock(); 2221 } 2222 if (com->state & CS_CHECKMSR) { 2223 u_char delta_modem_status; 2224 2225 com_lock(); 2226 delta_modem_status = com->last_modem_status 2227 ^ com->prev_modem_status; 2228 com->prev_modem_status = com->last_modem_status; 2229 com_events -= LOTS_OF_EVENTS; 2230 com->state &= ~CS_CHECKMSR; 2231 com_unlock(); 2232 if (delta_modem_status & MSR_DCD) 2233 (*linesw[tp->t_line].l_modem) 2234 (tp, com->prev_modem_status & MSR_DCD); 2235 } 2236 if (com->state & CS_ODONE) { 2237 com_lock(); 2238 com_events -= LOTS_OF_EVENTS; 2239 com->state &= ~CS_ODONE; 2240 com_unlock(); 2241 if (!(com->state & CS_BUSY) 2242 && !(com->extra_state & CSE_BUSYCHECK)) { 2243 callout_reset(&com->busy_ch, hz / 100, 2244 siobusycheck, com); 2245 com->extra_state |= CSE_BUSYCHECK; 2246 } 2247 (*linesw[tp->t_line].l_start)(tp); 2248 } 2249 if (com_events == 0) 2250 break; 2251 } 2252 if (com_events >= LOTS_OF_EVENTS) 2253 goto repeat; 2254 lwkt_reltoken(&tty_token); 2255 } 2256 2257 /* 2258 * Called with tty_token held but no com_lock 2259 */ 2260 static int 2261 comparam(struct tty *tp, struct termios *t) 2262 { 2263 u_int cfcr; 2264 int cflag; 2265 struct com_s *com; 2266 u_int divisor; 2267 u_char dlbh; 2268 u_char dlbl; 2269 int unit; 2270 2271 unit = DEV_TO_UNIT(tp->t_dev); 2272 com = com_addr(unit); 2273 if (com == NULL) { 2274 return (ENODEV); 2275 } 2276 2277 /* do historical conversions */ 2278 if (t->c_ispeed == 0) 2279 t->c_ispeed = t->c_ospeed; 2280 2281 /* check requested parameters */ 2282 if (t->c_ospeed == 0) { 2283 divisor = 0; 2284 } else { 2285 if (t->c_ispeed != t->c_ospeed) 2286 return (EINVAL); 2287 divisor = siodivisor(com->rclk, t->c_ispeed); 2288 if (divisor == 0) 2289 return (EINVAL); 2290 } 2291 2292 /* parameters are OK, convert them to the com struct and the device */ 2293 crit_enter(); 2294 if (divisor == 0) 2295 (void)commctl(com, TIOCM_DTR, DMBIC); /* hang up line */ 2296 else 2297 (void)commctl(com, TIOCM_DTR, DMBIS); 2298 cflag = t->c_cflag; 2299 switch (cflag & CSIZE) { 2300 case CS5: 2301 cfcr = CFCR_5BITS; 2302 break; 2303 case CS6: 2304 cfcr = CFCR_6BITS; 2305 break; 2306 case CS7: 2307 cfcr = CFCR_7BITS; 2308 break; 2309 default: 2310 cfcr = CFCR_8BITS; 2311 break; 2312 } 2313 if (cflag & PARENB) { 2314 cfcr |= CFCR_PENAB; 2315 if (!(cflag & PARODD)) 2316 cfcr |= CFCR_PEVEN; 2317 } 2318 if (cflag & CSTOPB) 2319 cfcr |= CFCR_STOPB; 2320 2321 if (com->hasfifo && divisor != 0) { 2322 /* 2323 * Use a fifo trigger level low enough so that the input 2324 * latency from the fifo is less than about 16 msec and 2325 * the total latency is less than about 30 msec. These 2326 * latencies are reasonable for humans. Serial comms 2327 * protocols shouldn't expect anything better since modem 2328 * latencies are larger. 2329 * 2330 * Interrupts can be held up for long periods of time 2331 * due to inefficiencies in other parts of the kernel, 2332 * certain video cards, etc. Setting the FIFO trigger 2333 * point to MEDH instead of HIGH gives us 694uS of slop 2334 * (8 character times) instead of 173uS (2 character times) 2335 * @ 115200 bps. 2336 */ 2337 com->fifo_image = t->c_ospeed <= 4800 2338 ? FIFO_ENABLE : FIFO_ENABLE | FIFO_RX_MEDH; 2339 #ifdef COM_ESP 2340 /* 2341 * The Hayes ESP card needs the fifo DMA mode bit set 2342 * in compatibility mode. If not, it will interrupt 2343 * for each character received. 2344 */ 2345 if (com->esp) 2346 com->fifo_image |= FIFO_DMA_MODE; 2347 #endif 2348 sio_setreg(com, com_fifo, com->fifo_image); 2349 } 2350 2351 /* 2352 * This returns with interrupts disabled so that we can complete 2353 * the speed change atomically. Keeping interrupts disabled is 2354 * especially important while com_data is hidden. 2355 */ 2356 siocntxwait(com->bsh); 2357 (void) siosetwater(com, t->c_ispeed); 2358 2359 if (divisor != 0) { 2360 sio_setreg(com, com_cfcr, cfcr | CFCR_DLAB); 2361 /* 2362 * Only set the divisor registers if they would change, 2363 * since on some 16550 incompatibles (UMC8669F), setting 2364 * them while input is arriving them loses sync until 2365 * data stops arriving. 2366 */ 2367 dlbl = divisor & 0xFF; 2368 if (sio_getreg(com, com_dlbl) != dlbl) 2369 sio_setreg(com, com_dlbl, dlbl); 2370 dlbh = divisor >> 8; 2371 if (sio_getreg(com, com_dlbh) != dlbh) 2372 sio_setreg(com, com_dlbh, dlbh); 2373 } 2374 sio_setreg(com, com_cfcr, com->cfcr_image = cfcr); 2375 2376 if (!(tp->t_state & TS_TTSTOP)) 2377 com->state |= CS_TTGO; 2378 2379 if (cflag & CRTS_IFLOW) { 2380 if (com->st16650a) { 2381 sio_setreg(com, com_cfcr, 0xbf); 2382 sio_setreg(com, com_fifo, 2383 sio_getreg(com, com_fifo) | 0x40); 2384 } 2385 com->state |= CS_RTS_IFLOW; 2386 /* 2387 * If CS_RTS_IFLOW just changed from off to on, the change 2388 * needs to be propagated to MCR_RTS. This isn't urgent, 2389 * so do it later by calling comstart() instead of repeating 2390 * a lot of code from comstart() here. 2391 */ 2392 } else if (com->state & CS_RTS_IFLOW) { 2393 com->state &= ~CS_RTS_IFLOW; 2394 /* 2395 * CS_RTS_IFLOW just changed from on to off. Force MCR_RTS 2396 * on here, since comstart() won't do it later. 2397 */ 2398 outb(com->modem_ctl_port, com->mcr_image |= MCR_RTS); 2399 if (com->st16650a) { 2400 sio_setreg(com, com_cfcr, 0xbf); 2401 sio_setreg(com, com_fifo, 2402 sio_getreg(com, com_fifo) & ~0x40); 2403 } 2404 } 2405 2406 /* 2407 * Set up state to handle output flow control. 2408 * XXX - worth handling MDMBUF (DCD) flow control at the lowest level? 2409 * Now has 10+ msec latency, while CTS flow has 50- usec latency. 2410 */ 2411 com->state |= CS_ODEVREADY; 2412 com->state &= ~CS_CTS_OFLOW; 2413 if (cflag & CCTS_OFLOW) { 2414 com->state |= CS_CTS_OFLOW; 2415 if (!(com->last_modem_status & MSR_CTS)) 2416 com->state &= ~CS_ODEVREADY; 2417 if (com->st16650a) { 2418 sio_setreg(com, com_cfcr, 0xbf); 2419 sio_setreg(com, com_fifo, 2420 sio_getreg(com, com_fifo) | 0x80); 2421 } 2422 } else { 2423 if (com->st16650a) { 2424 sio_setreg(com, com_cfcr, 0xbf); 2425 sio_setreg(com, com_fifo, 2426 sio_getreg(com, com_fifo) & ~0x80); 2427 } 2428 } 2429 2430 sio_setreg(com, com_cfcr, com->cfcr_image); 2431 2432 /* XXX shouldn't call functions while intrs are disabled. */ 2433 disc_optim(tp, t, com); 2434 /* 2435 * Recover from fiddling with CS_TTGO. We used to call siointr1() 2436 * unconditionally, but that defeated the careful discarding of 2437 * stale input in sioopen(). 2438 */ 2439 if (com->state >= (CS_BUSY | CS_TTGO)) { 2440 com_lock(); 2441 siointr1(com); 2442 com_unlock(); 2443 } 2444 crit_exit(); 2445 comstart(tp); 2446 if (com->ibufold != NULL) { 2447 kfree(com->ibufold, M_DEVBUF); 2448 com->ibufold = NULL; 2449 } 2450 return (0); 2451 } 2452 2453 /* 2454 * called with tty_token held 2455 */ 2456 static int 2457 siosetwater(struct com_s *com, speed_t speed) 2458 { 2459 int cp4ticks; 2460 u_char *ibuf; 2461 int ibufsize; 2462 struct tty *tp; 2463 2464 /* 2465 * Make the buffer size large enough to handle a softtty interrupt 2466 * latency of about 2 ticks without loss of throughput or data 2467 * (about 3 ticks if input flow control is not used or not honoured, 2468 * but a bit less for CS5-CS7 modes). 2469 */ 2470 cp4ticks = speed / 10 / hz * 4; 2471 for (ibufsize = 128; ibufsize < cp4ticks;) 2472 ibufsize <<= 1; 2473 if (ibufsize == com->ibufsize) 2474 return (0); 2475 2476 /* 2477 * Allocate input buffer. The extra factor of 2 in the size is 2478 * to allow for an error byte for each input byte. 2479 */ 2480 ibuf = kmalloc(2 * ibufsize, M_DEVBUF, M_WAITOK | M_ZERO); 2481 2482 /* Initialize non-critical variables. */ 2483 com->ibufold = com->ibuf; 2484 com->ibufsize = ibufsize; 2485 tp = com->tp; 2486 if (tp != NULL) { 2487 tp->t_ififosize = 2 * ibufsize; 2488 tp->t_ispeedwat = (speed_t)-1; 2489 tp->t_ospeedwat = (speed_t)-1; 2490 } 2491 2492 /* 2493 * Read current input buffer. 2494 */ 2495 com_lock(); 2496 if (com->iptr != com->ibuf) 2497 sioinput(com); 2498 2499 /*- 2500 * Initialize critical variables, including input buffer watermarks. 2501 * The external device is asked to stop sending when the buffer 2502 * exactly reaches high water, or when the high level requests it. 2503 * The high level is notified immediately (rather than at a later 2504 * clock tick) when this watermark is reached. 2505 * The buffer size is chosen so the watermark should almost never 2506 * be reached. 2507 * The low watermark is invisibly 0 since the buffer is always 2508 * emptied all at once. 2509 */ 2510 com->iptr = com->ibuf = ibuf; 2511 com->ibufend = ibuf + ibufsize; 2512 com->ierroff = ibufsize; 2513 com->ihighwater = ibuf + 3 * ibufsize / 4; 2514 com_unlock(); 2515 return (0); 2516 } 2517 2518 static void 2519 comstart(struct tty *tp) 2520 { 2521 struct com_s *com; 2522 int unit; 2523 2524 lwkt_gettoken(&tty_token); 2525 unit = DEV_TO_UNIT(tp->t_dev); 2526 com = com_addr(unit); 2527 if (com == NULL) { 2528 lwkt_reltoken(&tty_token); 2529 return; 2530 } 2531 crit_enter(); 2532 com_lock(); 2533 if (tp->t_state & TS_TTSTOP) 2534 com->state &= ~CS_TTGO; 2535 else 2536 com->state |= CS_TTGO; 2537 if (tp->t_state & TS_TBLOCK) { 2538 if (com->mcr_image & MCR_RTS && com->state & CS_RTS_IFLOW) 2539 outb(com->modem_ctl_port, com->mcr_image &= ~MCR_RTS); 2540 } else { 2541 if (!(com->mcr_image & MCR_RTS) && com->iptr < com->ihighwater 2542 && com->state & CS_RTS_IFLOW) 2543 outb(com->modem_ctl_port, com->mcr_image |= MCR_RTS); 2544 } 2545 com_unlock(); 2546 if (tp->t_state & (TS_TIMEOUT | TS_TTSTOP)) { 2547 ttwwakeup(tp); 2548 crit_exit(); 2549 lwkt_reltoken(&tty_token); 2550 return; 2551 } 2552 if (tp->t_outq.c_cc != 0) { 2553 struct lbq *qp; 2554 struct lbq *next; 2555 2556 if (!com->obufs[0].l_queued) { 2557 com->obufs[0].l_tail 2558 = com->obuf1 + q_to_b(&tp->t_outq, com->obuf1, 2559 sizeof com->obuf1); 2560 com->obufs[0].l_next = NULL; 2561 com->obufs[0].l_queued = TRUE; 2562 com_lock(); 2563 if (com->state & CS_BUSY) { 2564 qp = com->obufq.l_next; 2565 while ((next = qp->l_next) != NULL) 2566 qp = next; 2567 qp->l_next = &com->obufs[0]; 2568 } else { 2569 com->obufq.l_head = com->obufs[0].l_head; 2570 com->obufq.l_tail = com->obufs[0].l_tail; 2571 com->obufq.l_next = &com->obufs[0]; 2572 com->state |= CS_BUSY; 2573 } 2574 com_unlock(); 2575 } 2576 if (tp->t_outq.c_cc != 0 && !com->obufs[1].l_queued) { 2577 com->obufs[1].l_tail 2578 = com->obuf2 + q_to_b(&tp->t_outq, com->obuf2, 2579 sizeof com->obuf2); 2580 com->obufs[1].l_next = NULL; 2581 com->obufs[1].l_queued = TRUE; 2582 com_lock(); 2583 if (com->state & CS_BUSY) { 2584 qp = com->obufq.l_next; 2585 while ((next = qp->l_next) != NULL) 2586 qp = next; 2587 qp->l_next = &com->obufs[1]; 2588 } else { 2589 com->obufq.l_head = com->obufs[1].l_head; 2590 com->obufq.l_tail = com->obufs[1].l_tail; 2591 com->obufq.l_next = &com->obufs[1]; 2592 com->state |= CS_BUSY; 2593 } 2594 com_unlock(); 2595 } 2596 tp->t_state |= TS_BUSY; 2597 } 2598 com_lock(); 2599 if (com->state >= (CS_BUSY | CS_TTGO)) 2600 siointr1(com); /* fake interrupt to start output */ 2601 com_unlock(); 2602 ttwwakeup(tp); 2603 crit_exit(); 2604 lwkt_reltoken(&tty_token); 2605 } 2606 2607 static void 2608 comstop(struct tty *tp, int rw) 2609 { 2610 struct com_s *com; 2611 2612 lwkt_gettoken(&tty_token); 2613 com = com_addr(DEV_TO_UNIT(tp->t_dev)); 2614 if (com == NULL || com->gone) { 2615 lwkt_reltoken(&tty_token); 2616 return; 2617 } 2618 com_lock(); 2619 if (rw & FWRITE) { 2620 if (com->hasfifo) 2621 #ifdef COM_ESP 2622 /* XXX avoid h/w bug. */ 2623 if (!com->esp) 2624 #endif 2625 sio_setreg(com, com_fifo, 2626 FIFO_XMT_RST | com->fifo_image); 2627 com->obufs[0].l_queued = FALSE; 2628 com->obufs[1].l_queued = FALSE; 2629 if (com->state & CS_ODONE) 2630 com_events -= LOTS_OF_EVENTS; 2631 com->state &= ~(CS_ODONE | CS_BUSY); 2632 com->tp->t_state &= ~TS_BUSY; 2633 } 2634 if (rw & FREAD) { 2635 if (com->hasfifo) 2636 #ifdef COM_ESP 2637 /* XXX avoid h/w bug. */ 2638 if (!com->esp) 2639 #endif 2640 sio_setreg(com, com_fifo, 2641 FIFO_RCV_RST | com->fifo_image); 2642 com_events -= (com->iptr - com->ibuf); 2643 com->iptr = com->ibuf; 2644 } 2645 com_unlock(); 2646 comstart(tp); 2647 lwkt_reltoken(&tty_token); 2648 } 2649 2650 static int 2651 commctl(struct com_s *com, int bits, int how) 2652 { 2653 int mcr; 2654 int msr; 2655 2656 lwkt_gettoken(&tty_token); 2657 if (how == DMGET) { 2658 bits = TIOCM_LE; /* XXX - always enabled while open */ 2659 mcr = com->mcr_image; 2660 if (mcr & MCR_DTR) 2661 bits |= TIOCM_DTR; 2662 if (mcr & MCR_RTS) 2663 bits |= TIOCM_RTS; 2664 msr = com->prev_modem_status; 2665 if (msr & MSR_CTS) 2666 bits |= TIOCM_CTS; 2667 if (msr & MSR_DCD) 2668 bits |= TIOCM_CD; 2669 if (msr & MSR_DSR) 2670 bits |= TIOCM_DSR; 2671 /* 2672 * XXX - MSR_RI is naturally volatile, and we make MSR_TERI 2673 * more volatile by reading the modem status a lot. Perhaps 2674 * we should latch both bits until the status is read here. 2675 */ 2676 if (msr & (MSR_RI | MSR_TERI)) 2677 bits |= TIOCM_RI; 2678 lwkt_reltoken(&tty_token); 2679 return (bits); 2680 } 2681 mcr = 0; 2682 if (bits & TIOCM_DTR) 2683 mcr |= MCR_DTR; 2684 if (bits & TIOCM_RTS) 2685 mcr |= MCR_RTS; 2686 if (com->gone) { 2687 lwkt_reltoken(&tty_token); 2688 return(0); 2689 } 2690 com_lock(); 2691 switch (how) { 2692 case DMSET: 2693 outb(com->modem_ctl_port, 2694 com->mcr_image = mcr | (com->mcr_image & MCR_IENABLE)); 2695 break; 2696 case DMBIS: 2697 outb(com->modem_ctl_port, com->mcr_image |= mcr); 2698 break; 2699 case DMBIC: 2700 outb(com->modem_ctl_port, com->mcr_image &= ~mcr); 2701 break; 2702 } 2703 com_unlock(); 2704 lwkt_reltoken(&tty_token); 2705 return (0); 2706 } 2707 2708 /* 2709 * NOTE: Must be called with tty_token held 2710 */ 2711 static void 2712 siosettimeout(void) 2713 { 2714 struct com_s *com; 2715 bool_t someopen; 2716 int unit; 2717 2718 ASSERT_LWKT_TOKEN_HELD(&tty_token); 2719 /* 2720 * Set our timeout period to 1 second if no polled devices are open. 2721 * Otherwise set it to max(1/200, 1/hz). 2722 * Enable timeouts iff some device is open. 2723 */ 2724 callout_stop(&sio_timeout_handle); 2725 sio_timeout = hz; 2726 someopen = FALSE; 2727 for (unit = 0; unit < sio_numunits; ++unit) { 2728 com = com_addr(unit); 2729 if (com != NULL && com->tp != NULL 2730 && com->tp->t_state & TS_ISOPEN && !com->gone) { 2731 someopen = TRUE; 2732 if (com->poll || com->poll_output) { 2733 sio_timeout = hz > 200 ? hz / 200 : 1; 2734 break; 2735 } 2736 } 2737 } 2738 if (someopen) { 2739 sio_timeouts_until_log = hz / sio_timeout; 2740 callout_reset(&sio_timeout_handle, sio_timeout, 2741 comwakeup, NULL); 2742 } else { 2743 /* Flush error messages, if any. */ 2744 sio_timeouts_until_log = 1; 2745 comwakeup(NULL); 2746 callout_stop(&sio_timeout_handle); 2747 } 2748 } 2749 2750 /* 2751 * NOTE: Must be called with tty_token held 2752 */ 2753 static void 2754 comwakeup(void *chan) 2755 { 2756 struct com_s *com; 2757 int unit; 2758 2759 /* 2760 * Can be called from a callout too so just get the token 2761 */ 2762 lwkt_gettoken(&tty_token); 2763 callout_reset(&sio_timeout_handle, sio_timeout, comwakeup, NULL); 2764 2765 /* 2766 * Recover from lost output interrupts. 2767 * Poll any lines that don't use interrupts. 2768 */ 2769 for (unit = 0; unit < sio_numunits; ++unit) { 2770 com = com_addr(unit); 2771 if (com != NULL && !com->gone 2772 && (com->state >= (CS_BUSY | CS_TTGO) || com->poll)) { 2773 com_lock(); 2774 siointr1(com); 2775 com_unlock(); 2776 } 2777 } 2778 2779 /* 2780 * Check for and log errors, but not too often. 2781 */ 2782 if (--sio_timeouts_until_log > 0) { 2783 lwkt_reltoken(&tty_token); 2784 return; 2785 } 2786 sio_timeouts_until_log = hz / sio_timeout; 2787 for (unit = 0; unit < sio_numunits; ++unit) { 2788 int errnum; 2789 2790 com = com_addr(unit); 2791 if (com == NULL) 2792 continue; 2793 if (com->gone) 2794 continue; 2795 for (errnum = 0; errnum < CE_NTYPES; ++errnum) { 2796 u_int delta; 2797 u_long total; 2798 2799 com_lock(); 2800 delta = com->delta_error_counts[errnum]; 2801 com->delta_error_counts[errnum] = 0; 2802 com_unlock(); 2803 if (delta == 0) 2804 continue; 2805 total = com->error_counts[errnum] += delta; 2806 log(LOG_ERR, "sio%d: %u more %s%s (total %lu)\n", 2807 unit, delta, error_desc[errnum], 2808 delta == 1 ? "" : "s", total); 2809 } 2810 } 2811 lwkt_reltoken(&tty_token); 2812 } 2813 2814 static void 2815 disc_optim(struct tty *tp, struct termios *t, struct com_s *com) 2816 { 2817 lwkt_gettoken(&tty_token); 2818 if (!(t->c_iflag & (ICRNL | IGNCR | IMAXBEL | INLCR | ISTRIP | IXON)) 2819 && (!(t->c_iflag & BRKINT) || (t->c_iflag & IGNBRK)) 2820 && (!(t->c_iflag & PARMRK) 2821 || (t->c_iflag & (IGNPAR | IGNBRK)) == (IGNPAR | IGNBRK)) 2822 && !(t->c_lflag & (ECHO | ICANON | IEXTEN | ISIG | PENDIN)) 2823 && linesw[tp->t_line].l_rint == ttyinput) 2824 tp->t_state |= TS_CAN_BYPASS_L_RINT; 2825 else 2826 tp->t_state &= ~TS_CAN_BYPASS_L_RINT; 2827 com->hotchar = linesw[tp->t_line].l_hotchar; 2828 lwkt_reltoken(&tty_token); 2829 } 2830 2831 /* 2832 * Following are all routines needed for SIO to act as console 2833 */ 2834 #include <sys/cons.h> 2835 2836 struct siocnstate { 2837 u_char dlbl; 2838 u_char dlbh; 2839 u_char ier; 2840 u_char cfcr; 2841 u_char mcr; 2842 }; 2843 2844 static speed_t siocngetspeed (Port_t, u_long rclk); 2845 #if 0 2846 static void siocnclose (struct siocnstate *sp, Port_t iobase); 2847 #endif 2848 static void siocnopen (struct siocnstate *sp, Port_t iobase, int speed); 2849 2850 static cn_probe_t siocnprobe; 2851 static cn_init_t siocninit; 2852 static cn_init_fini_t siocninit_fini; 2853 static cn_checkc_t siocncheckc; 2854 static cn_getc_t siocngetc; 2855 static cn_putc_t siocnputc; 2856 2857 #if defined(__i386__) || defined(__x86_64__) 2858 CONS_DRIVER(sio, siocnprobe, siocninit, siocninit_fini, 2859 NULL, siocngetc, siocncheckc, siocnputc, NULL, NULL); 2860 #endif 2861 2862 /* To get the GDB related variables */ 2863 #if DDB > 0 2864 #include <ddb/ddb.h> 2865 #endif 2866 2867 static void 2868 siocntxwait(Port_t iobase) 2869 { 2870 int timo; 2871 2872 /* 2873 * Wait for any pending transmission to finish. Required to avoid 2874 * the UART lockup bug when the speed is changed, and for normal 2875 * transmits. 2876 */ 2877 timo = 100000; 2878 while ((inb(iobase + com_lsr) & (LSR_TSRE | LSR_TXRDY)) 2879 != (LSR_TSRE | LSR_TXRDY) && --timo != 0) 2880 ; 2881 } 2882 2883 /* 2884 * Read the serial port specified and try to figure out what speed 2885 * it's currently running at. We're assuming the serial port has 2886 * been initialized and is basicly idle. This routine is only intended 2887 * to be run at system startup. 2888 * 2889 * If the value read from the serial port doesn't make sense, return 0. 2890 */ 2891 /* 2892 * NOTE: Must be called with tty_token held 2893 */ 2894 static speed_t 2895 siocngetspeed(Port_t iobase, u_long rclk) 2896 { 2897 u_int divisor; 2898 u_char dlbh; 2899 u_char dlbl; 2900 u_char cfcr; 2901 2902 cfcr = inb(iobase + com_cfcr); 2903 outb(iobase + com_cfcr, CFCR_DLAB | cfcr); 2904 2905 dlbl = inb(iobase + com_dlbl); 2906 dlbh = inb(iobase + com_dlbh); 2907 2908 outb(iobase + com_cfcr, cfcr); 2909 2910 divisor = dlbh << 8 | dlbl; 2911 2912 /* XXX there should be more sanity checking. */ 2913 if (divisor == 0) 2914 return (CONSPEED); 2915 return (rclk / (16UL * divisor)); 2916 } 2917 2918 static void 2919 siocnopen(struct siocnstate *sp, Port_t iobase, int speed) 2920 { 2921 u_int divisor; 2922 u_char dlbh; 2923 u_char dlbl; 2924 2925 /* 2926 * Save all the device control registers except the fifo register 2927 * and set our default ones (cs8 -parenb speed=comdefaultrate). 2928 * We can't save the fifo register since it is read-only. 2929 */ 2930 sp->ier = inb(iobase + com_ier); 2931 outb(iobase + com_ier, 0); /* spltty() doesn't stop siointr() */ 2932 siocntxwait(iobase); 2933 sp->cfcr = inb(iobase + com_cfcr); 2934 outb(iobase + com_cfcr, CFCR_DLAB | CFCR_8BITS); 2935 sp->dlbl = inb(iobase + com_dlbl); 2936 sp->dlbh = inb(iobase + com_dlbh); 2937 /* 2938 * Only set the divisor registers if they would change, since on 2939 * some 16550 incompatibles (Startech), setting them clears the 2940 * data input register. This also reduces the effects of the 2941 * UMC8669F bug. 2942 */ 2943 divisor = siodivisor(comdefaultrclk, speed); 2944 dlbl = divisor & 0xFF; 2945 if (sp->dlbl != dlbl) 2946 outb(iobase + com_dlbl, dlbl); 2947 dlbh = divisor >> 8; 2948 if (sp->dlbh != dlbh) 2949 outb(iobase + com_dlbh, dlbh); 2950 outb(iobase + com_cfcr, CFCR_8BITS); 2951 sp->mcr = inb(iobase + com_mcr); 2952 /* 2953 * We don't want interrupts, but must be careful not to "disable" 2954 * them by clearing the MCR_IENABLE bit, since that might cause 2955 * an interrupt by floating the IRQ line. 2956 */ 2957 outb(iobase + com_mcr, (sp->mcr & MCR_IENABLE) | MCR_DTR | MCR_RTS); 2958 } 2959 2960 #if 0 2961 static void 2962 siocnclose(struct siocnstate *sp, Port_t iobase) 2963 { 2964 /* 2965 * Restore the device control registers. 2966 */ 2967 siocntxwait(iobase); 2968 outb(iobase + com_cfcr, CFCR_DLAB | CFCR_8BITS); 2969 if (sp->dlbl != inb(iobase + com_dlbl)) 2970 outb(iobase + com_dlbl, sp->dlbl); 2971 if (sp->dlbh != inb(iobase + com_dlbh)) 2972 outb(iobase + com_dlbh, sp->dlbh); 2973 outb(iobase + com_cfcr, sp->cfcr); 2974 /* 2975 * XXX damp oscillations of MCR_DTR and MCR_RTS by not restoring them. 2976 */ 2977 outb(iobase + com_mcr, sp->mcr | MCR_DTR | MCR_RTS); 2978 outb(iobase + com_ier, sp->ier); 2979 } 2980 #endif 2981 2982 static void 2983 siocnprobe(struct consdev *cp) 2984 { 2985 u_char cfcr; 2986 u_int divisor; 2987 int unit; 2988 struct siocnstate sp; 2989 2990 /* 2991 * Find our first enabled console, if any. If it is a high-level 2992 * console device, then initialize it and return successfully. 2993 * If it is a low-level console device, then initialize it and 2994 * return unsuccessfully. It must be initialized in both cases 2995 * for early use by console drivers and debuggers. Initializing 2996 * the hardware is not necessary in all cases, since the i/o 2997 * routines initialize it on the fly, but it is necessary if 2998 * input might arrive while the hardware is switched back to an 2999 * uninitialized state. We can't handle multiple console devices 3000 * yet because our low-level routines don't take a device arg. 3001 * We trust the user to set the console flags properly so that we 3002 * don't need to probe. 3003 */ 3004 cp->cn_pri = CN_DEAD; 3005 3006 for (unit = 0; unit < 16; unit++) { /* XXX need to know how many */ 3007 int flags; 3008 int disabled; 3009 3010 if (!resource_int_value("sio", unit, "disabled", &disabled)) { 3011 if (disabled) 3012 continue; 3013 } 3014 if (resource_int_value("sio", unit, "flags", &flags)) 3015 continue; 3016 if (COM_CONSOLE(flags) || COM_DEBUGGER(flags)) { 3017 int port; 3018 int baud; 3019 Port_t iobase; 3020 speed_t boot_speed; 3021 struct com_s *com; 3022 3023 /* 3024 * We need the port. For built-in serial ports 3025 * (e.g. sio0/sio1) the resources exist. For 3026 * add-on serial ports they resources might not 3027 * but the port may have been configured late 3028 * and we can find it when we re-probe. 3029 * 3030 * If the port is not specified check to see if 3031 * the device configured after the fact. 3032 */ 3033 com = com_addr(unit); 3034 if (resource_int_value("sio", unit, "port", &port)) { 3035 if (com == NULL || com->ioportres == NULL) 3036 continue; 3037 port = rman_get_bushandle(com->ioportres); 3038 } 3039 if (resource_int_value("sio", unit, "baud", &baud) == 0) 3040 boot_speed = baud; 3041 else 3042 boot_speed = 0; 3043 iobase = port; 3044 crit_enter(); 3045 if (boothowto & RB_SERIAL) { 3046 if (boot_speed == 0) { 3047 boot_speed = siocngetspeed(iobase, 3048 comdefaultrclk); 3049 } 3050 if (boot_speed) 3051 comdefaultrate = boot_speed; 3052 } 3053 if (boot_speed == 0) 3054 boot_speed = comdefaultrate; 3055 3056 /* 3057 * Initialize the divisor latch. We can't rely on 3058 * siocnopen() to do this the first time, since it 3059 * avoids writing to the latch if the latch appears 3060 * to have the correct value. Also, if we didn't 3061 * just read the speed from the hardware, then we 3062 * need to set the speed in hardware so that 3063 * switching it later is null. 3064 */ 3065 com_lock(); 3066 cfcr = inb(iobase + com_cfcr); 3067 outb(iobase + com_cfcr, CFCR_DLAB | cfcr); 3068 divisor = siodivisor(comdefaultrclk, boot_speed); 3069 outb(iobase + com_dlbl, divisor & 0xff); 3070 outb(iobase + com_dlbh, divisor >> 8); 3071 outb(iobase + com_cfcr, cfcr); 3072 3073 /* 3074 * We want ttyopen 3075 */ 3076 if (com) { 3077 com->it_in.c_iflag = TTYDEF_IFLAG; 3078 com->it_in.c_oflag = TTYDEF_OFLAG; 3079 com->it_in.c_cflag = TTYDEF_CFLAG | CLOCAL; 3080 com->it_in.c_lflag = TTYDEF_LFLAG; 3081 com->lt_out.c_cflag = com->lt_in.c_cflag = CLOCAL; 3082 com->lt_out.c_ispeed = com->lt_out.c_ospeed = 3083 com->lt_in.c_ispeed = com->lt_in.c_ospeed = 3084 com->it_in.c_ispeed = com->it_in.c_ospeed = 3085 boot_speed; 3086 } 3087 3088 siocnopen(&sp, iobase, boot_speed); 3089 com_unlock(); 3090 3091 crit_exit(); 3092 if (COM_CONSOLE(flags) && !COM_LLCONSOLE(flags)) { 3093 cp->cn_probegood = 1; 3094 cp->cn_private = (void *)(intptr_t)unit; 3095 cp->cn_pri = (COM_FORCECONSOLE(flags) 3096 || ((boothowto & RB_SERIAL)) ? 3097 CN_REMOTE : CN_NORMAL); 3098 siocniobase = iobase; 3099 siocnunit = unit; 3100 } 3101 if (COM_DEBUGGER(flags) && gdb_tab == NULL) { 3102 kprintf("sio%d: gdb debugging port\n", unit); 3103 siogdbiobase = iobase; 3104 siogdbunit = unit; 3105 #if DDB > 0 3106 cp->cn_gdbprivate = (void *)(intptr_t)unit; 3107 gdb_tab = cp; 3108 #endif 3109 } 3110 } 3111 } 3112 #if defined(__i386__) || defined(__x86_64__) 3113 #if DDB > 0 3114 /* 3115 * XXX Ugly Compatibility. 3116 * If no gdb port has been specified, set it to be the console 3117 * as some configuration files don't specify the gdb port. 3118 */ 3119 if (gdb_tab == NULL && (boothowto & RB_GDB)) { 3120 kprintf("Warning: no GDB port specified. Defaulting to sio%d.\n", 3121 siocnunit); 3122 kprintf("Set flag 0x80 on desired GDB port in your\n"); 3123 kprintf("configuration file (currently sio only).\n"); 3124 siogdbiobase = siocniobase; 3125 siogdbunit = siocnunit; 3126 cp->cn_gdbprivate = (void *)(intptr_t)siocnunit; 3127 gdb_tab = cp; 3128 } 3129 #endif 3130 #endif 3131 } 3132 3133 static void 3134 siocninit(struct consdev *cp) 3135 { 3136 comconsole = (int)(intptr_t)cp->cn_private; 3137 } 3138 3139 static void 3140 siocninit_fini(struct consdev *cp) 3141 { 3142 cdev_t dev; 3143 char tbuf[MAKEDEV_MINNBUF]; 3144 int unit; 3145 3146 if (cp->cn_probegood) { 3147 unit = (int)(intptr_t)cp->cn_private; 3148 3149 /* 3150 * Call devfs_find_device_by_name on ttydX to find the correct 3151 * device, as it should have been created already at this 3152 * point by the attach routine. 3153 * 3154 * If it isn't found, the serial port was not attached at all 3155 * and we shouldn't be here, so assert this case. 3156 */ 3157 dev = devfs_find_device_by_name("ttyd%s", 3158 makedev_unit_b32(tbuf, unit)); 3159 3160 KKASSERT(dev != NULL); 3161 cp->cn_dev = dev; 3162 } 3163 } 3164 3165 static int 3166 siocncheckc(void *private) 3167 { 3168 int c; 3169 int unit = (int)(intptr_t)private; 3170 Port_t iobase; 3171 #if 0 3172 struct siocnstate sp; 3173 #endif 3174 3175 if (unit == siogdbunit) 3176 iobase = siogdbiobase; 3177 else 3178 iobase = siocniobase; 3179 com_lock(); 3180 crit_enter(); 3181 #if 0 3182 siocnopen(&sp, iobase, comdefaultrate); 3183 #endif 3184 if (inb(iobase + com_lsr) & LSR_RXRDY) 3185 c = inb(iobase + com_data); 3186 else 3187 c = -1; 3188 #if 0 3189 siocnclose(&sp, iobase); 3190 #endif 3191 crit_exit(); 3192 com_unlock(); 3193 return (c); 3194 } 3195 3196 3197 static int 3198 siocngetc(void *private) 3199 { 3200 int c; 3201 int unit = (int)(intptr_t)private; 3202 Port_t iobase; 3203 #if 0 3204 struct siocnstate sp; 3205 #endif 3206 3207 if (unit == siogdbunit) 3208 iobase = siogdbiobase; 3209 else 3210 iobase = siocniobase; 3211 com_lock(); 3212 crit_enter(); 3213 #if 0 3214 siocnopen(&sp, iobase, comdefaultrate); 3215 #endif 3216 while (!(inb(iobase + com_lsr) & LSR_RXRDY)) 3217 ; 3218 c = inb(iobase + com_data); 3219 #if 0 3220 siocnclose(&sp, iobase); 3221 #endif 3222 crit_exit(); 3223 com_unlock(); 3224 return (c); 3225 } 3226 3227 static void 3228 siocnputc(void *private, int c) 3229 { 3230 int unit = (int)(intptr_t)private; 3231 #if 0 3232 struct siocnstate sp; 3233 #endif 3234 Port_t iobase; 3235 3236 if (unit == siogdbunit) 3237 iobase = siogdbiobase; 3238 else 3239 iobase = siocniobase; 3240 com_lock(); 3241 crit_enter(); 3242 #if 0 3243 siocnopen(&sp, iobase, comdefaultrate); 3244 #endif 3245 siocntxwait(iobase); 3246 outb(iobase + com_data, c); 3247 #if 0 3248 siocnclose(&sp, iobase); 3249 #endif 3250 crit_exit(); 3251 com_unlock(); 3252 } 3253 3254 DRIVER_MODULE(sio, isa, sio_isa_driver, sio_devclass, NULL, NULL); 3255 DRIVER_MODULE(sio, acpi, sio_isa_driver, sio_devclass, NULL, NULL); 3256 #if NPCI > 0 3257 DRIVER_MODULE(sio, pci, sio_pci_driver, sio_devclass, NULL, NULL); 3258 #endif 3259 #if NPUC > 0 3260 DRIVER_MODULE(sio, puc, sio_puc_driver, sio_devclass, NULL, NULL); 3261 #endif 3262