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