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