1 /*- 2 * (MPSAFE) 3 * 4 * Copyright (c) 1991 The Regents of the University of California. 5 * All rights reserved. 6 * 7 * Redistribution and use in source and binary forms, with or without 8 * modification, are permitted provided that the following conditions 9 * are met: 10 * 1. Redistributions of source code must retain the above copyright 11 * notice, this list of conditions and the following disclaimer. 12 * 2. Redistributions in binary form must reproduce the above copyright 13 * notice, this list of conditions and the following disclaimer in the 14 * documentation and/or other materials provided with the distribution. 15 * 3. Neither the name of the University nor the names of its contributors 16 * may be used to endorse or promote products derived from this software 17 * without specific prior written permission. 18 * 19 * THIS SOFTWARE IS PROVIDED BY THE REGENTS AND CONTRIBUTORS ``AS IS'' AND 20 * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE 21 * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE 22 * ARE DISCLAIMED. IN NO EVENT SHALL THE REGENTS OR CONTRIBUTORS BE LIABLE 23 * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL 24 * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS 25 * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) 26 * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT 27 * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY 28 * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF 29 * SUCH DAMAGE. 30 * 31 * $FreeBSD: src/sys/isa/sio.c,v 1.291.2.35 2003/05/18 08:51:15 murray Exp $ 32 * from: @(#)com.c 7.5 (Berkeley) 5/16/91 33 * from: i386/isa sio.c,v 1.234 34 */ 35 36 #include "opt_comconsole.h" 37 #include "opt_ddb.h" 38 #include "opt_sio.h" 39 #include "use_pci.h" 40 #include "use_puc.h" 41 42 /* 43 * Serial driver, based on 386BSD-0.1 com driver. 44 * Mostly rewritten to use pseudo-DMA. 45 * Works for National Semiconductor NS8250-NS16550AF UARTs. 46 * COM driver, based on HP dca driver. 47 * 48 * Changes for PC-Card integration: 49 * - Added PC-Card driver table and handlers 50 */ 51 #include <sys/param.h> 52 #include <sys/systm.h> 53 #include <sys/reboot.h> 54 #include <sys/malloc.h> 55 #include <sys/tty.h> 56 #include <sys/ttydefaults.h> /* for TTYDEF_* */ 57 #include <sys/proc.h> 58 #include <sys/priv.h> 59 #include <sys/module.h> 60 #include <sys/conf.h> 61 #include <sys/dkstat.h> 62 #include <sys/fcntl.h> 63 #include <sys/interrupt.h> 64 #include <sys/kernel.h> 65 #include <sys/syslog.h> 66 #include <sys/sysctl.h> 67 #include <sys/bus.h> 68 #include <sys/rman.h> 69 #include <sys/timepps.h> 70 #include <sys/thread2.h> 71 #include <sys/devfs.h> 72 #include <sys/consio.h> 73 74 #include <machine/limits.h> 75 76 #include <bus/isa/isareg.h> 77 #include <bus/isa/isavar.h> 78 #if NPCI > 0 79 #include <bus/pci/pcireg.h> 80 #include <bus/pci/pcivar.h> 81 #endif 82 #if NPUC > 0 83 #include <dev/misc/puc/pucvar.h> 84 #endif 85 #include <machine/lock.h> 86 87 #include <machine/clock.h> 88 89 #include "sioreg.h" 90 #include "sio_private.h" 91 92 #ifdef COM_ESP 93 #include "../ic_layer/esp.h" 94 #endif 95 96 #define LOTS_OF_EVENTS 64 /* helps separate urgent events from input */ 97 98 #define CALLOUT_MASK 0x80 99 #define CONTROL_MASK 0x60 100 #define CONTROL_INIT_STATE 0x20 101 #define CONTROL_LOCK_STATE 0x40 102 #define DEV_TO_UNIT(dev) (MINOR_TO_UNIT(minor(dev))) 103 #define MINOR_TO_UNIT(mynor) ((((mynor) & ~0xffffU) >> (8 + 3)) \ 104 | ((mynor) & 0x1f)) 105 #define UNIT_TO_MINOR(unit) ((((unit) & ~0x1fU) << (8 + 3)) \ 106 | ((unit) & 0x1f)) 107 108 #define com_scr 7 /* scratch register for 16450-16550 (R/W) */ 109 110 #define sio_getreg(com, off) \ 111 (bus_space_read_1((com)->bst, (com)->bsh, (off))) 112 #define sio_setreg(com, off, value) \ 113 (bus_space_write_1((com)->bst, (com)->bsh, (off), (value))) 114 115 /* 116 * com state bits. 117 * (CS_BUSY | CS_TTGO) and (CS_BUSY | CS_TTGO | CS_ODEVREADY) must be higher 118 * than the other bits so that they can be tested as a group without masking 119 * off the low bits. 120 * 121 * The following com and tty flags correspond closely: 122 * CS_BUSY = TS_BUSY (maintained by comstart(), siopoll() and 123 * comstop()) 124 * CS_TTGO = ~TS_TTSTOP (maintained by comparam() and comstart()) 125 * CS_CTS_OFLOW = CCTS_OFLOW (maintained by comparam()) 126 * CS_RTS_IFLOW = CRTS_IFLOW (maintained by comparam()) 127 * TS_FLUSH is not used. 128 * XXX I think TIOCSETA doesn't clear TS_TTSTOP when it clears IXON. 129 * XXX CS_*FLOW should be CF_*FLOW in com->flags (control flags not state). 130 */ 131 #define CS_BUSY 0x80 /* output in progress */ 132 #define CS_TTGO 0x40 /* output not stopped by XOFF */ 133 #define CS_ODEVREADY 0x20 /* external device h/w ready (CTS) */ 134 #define CS_CHECKMSR 1 /* check of MSR scheduled */ 135 #define CS_CTS_OFLOW 2 /* use CTS output flow control */ 136 #define CS_DTR_OFF 0x10 /* DTR held off */ 137 #define CS_ODONE 4 /* output completed */ 138 #define CS_RTS_IFLOW 8 /* use RTS input flow control */ 139 #define CSE_BUSYCHECK 1 /* siobusycheck() scheduled */ 140 141 static char const * const error_desc[] = { 142 #define CE_OVERRUN 0 143 "silo overflow", 144 #define CE_INTERRUPT_BUF_OVERFLOW 1 145 "interrupt-level buffer overflow", 146 #define CE_TTY_BUF_OVERFLOW 2 147 "tty-level buffer overflow", 148 }; 149 150 #ifdef COM_ESP 151 static int espattach (struct com_s *com, Port_t esp_port); 152 #endif 153 static int sio_isa_attach (device_t dev); 154 155 static timeout_t siobusycheck; 156 static u_int siodivisor (u_long rclk, speed_t speed); 157 static timeout_t siodtrwakeup; 158 static void comhardclose (struct com_s *com); 159 static void sioinput (struct com_s *com); 160 static void siointr1 (struct com_s *com); 161 static void siointr (void *arg); 162 static int commctl (struct com_s *com, int bits, int how); 163 static int comparam (struct tty *tp, struct termios *t); 164 static inthand2_t siopoll; 165 static int sio_isa_probe (device_t dev); 166 static void siosettimeout (void); 167 static int siosetwater (struct com_s *com, speed_t speed); 168 static void comstart (struct tty *tp); 169 static void comstop (struct tty *tp, int rw); 170 static timeout_t comwakeup; 171 static void disc_optim (struct tty *tp, struct termios *t, 172 struct com_s *com); 173 static void siocntxwait (Port_t iobase); 174 175 #if NPCI > 0 176 static int sio_pci_attach (device_t dev); 177 static void sio_pci_kludge_unit (device_t dev); 178 static int sio_pci_probe (device_t dev); 179 #endif /* NPCI > 0 */ 180 181 #if NPUC > 0 182 static int sio_puc_attach (device_t dev); 183 static int sio_puc_probe (device_t dev); 184 #endif /* NPUC > 0 */ 185 186 static char driver_name[] = "sio"; 187 188 /* table and macro for fast conversion from a unit number to its com struct */ 189 devclass_t sio_devclass; 190 #define com_addr(unit) ((struct com_s *) \ 191 devclass_get_softc(sio_devclass, unit)) 192 193 static device_method_t sio_isa_methods[] = { 194 /* Device interface */ 195 DEVMETHOD(device_probe, sio_isa_probe), 196 DEVMETHOD(device_attach, sio_isa_attach), 197 198 DEVMETHOD_END 199 }; 200 201 static driver_t sio_isa_driver = { 202 driver_name, 203 sio_isa_methods, 204 sizeof(struct com_s), 205 }; 206 207 #if NPCI > 0 208 static device_method_t sio_pci_methods[] = { 209 /* Device interface */ 210 DEVMETHOD(device_probe, sio_pci_probe), 211 DEVMETHOD(device_attach, sio_pci_attach), 212 213 DEVMETHOD_END 214 }; 215 216 static driver_t sio_pci_driver = { 217 driver_name, 218 sio_pci_methods, 219 sizeof(struct com_s), 220 }; 221 #endif /* NPCI > 0 */ 222 223 #if NPUC > 0 224 static device_method_t sio_puc_methods[] = { 225 /* Device interface */ 226 DEVMETHOD(device_probe, sio_puc_probe), 227 DEVMETHOD(device_attach, sio_puc_attach), 228 229 DEVMETHOD_END 230 }; 231 232 static driver_t sio_puc_driver = { 233 driver_name, 234 sio_puc_methods, 235 sizeof(struct com_s), 236 }; 237 #endif /* NPUC > 0 */ 238 239 static d_open_t sioopen; 240 static d_close_t sioclose; 241 static d_read_t sioread; 242 static d_write_t siowrite; 243 static d_ioctl_t sioioctl; 244 245 static struct dev_ops sio_ops = { 246 { driver_name, 0, D_TTY }, 247 .d_open = sioopen, 248 .d_close = sioclose, 249 .d_read = sioread, 250 .d_write = siowrite, 251 .d_ioctl = sioioctl, 252 .d_kqfilter = ttykqfilter, 253 .d_revoke = ttyrevoke 254 }; 255 256 int comconsole = -1; 257 static volatile speed_t comdefaultrate = CONSPEED; 258 static u_long comdefaultrclk = DEFAULT_RCLK; 259 SYSCTL_ULONG(_machdep, OID_AUTO, conrclk, CTLFLAG_RW, &comdefaultrclk, 0, ""); 260 static u_int com_events; /* input chars + weighted output completions */ 261 static Port_t siocniobase; 262 static int siocnunit; 263 static Port_t siogdbiobase; 264 static int siogdbunit = -1; 265 static bool_t sio_registered; 266 static int sio_timeout; 267 static int sio_timeouts_until_log; 268 static struct callout sio_timeout_handle; 269 static int sio_numunits; 270 271 #ifdef COM_ESP 272 /* XXX configure this properly. */ 273 static Port_t likely_com_ports[] = { 0x3f8, 0x2f8, 0x3e8, 0x2e8, }; 274 static Port_t likely_esp_ports[] = { 0x140, 0x180, 0x280, 0 }; 275 #endif 276 277 /* 278 * handle sysctl read/write requests for console speed 279 * 280 * In addition to setting comdefaultrate for I/O through /dev/console, 281 * also set the initial and lock values for the /dev/ttyXX device 282 * if there is one associated with the console. Finally, if the /dev/tty 283 * device has already been open, change the speed on the open running port 284 * itself. 285 */ 286 287 static int 288 sysctl_machdep_comdefaultrate(SYSCTL_HANDLER_ARGS) 289 { 290 int error; 291 speed_t newspeed; 292 struct com_s *com; 293 struct tty *tp; 294 295 lwkt_gettoken(&tty_token); 296 newspeed = comdefaultrate; 297 298 error = sysctl_handle_opaque(oidp, &newspeed, sizeof newspeed, req); 299 if (error || !req->newptr) { 300 lwkt_reltoken(&tty_token); 301 return (error); 302 } 303 304 comdefaultrate = newspeed; 305 306 if (comconsole < 0) { /* serial console not selected? */ 307 lwkt_reltoken(&tty_token); 308 return (0); 309 } 310 311 com = com_addr(comconsole); 312 if (com == NULL) { 313 lwkt_reltoken(&tty_token); 314 return (ENXIO); 315 } 316 317 /* 318 * set the initial and lock rates for /dev/ttydXX and /dev/cuaXX 319 * (note, the lock rates really are boolean -- if non-zero, disallow 320 * speed changes) 321 */ 322 com->it_in.c_ispeed = com->it_in.c_ospeed = 323 com->lt_in.c_ispeed = com->lt_in.c_ospeed = 324 com->it_out.c_ispeed = com->it_out.c_ospeed = 325 com->lt_out.c_ispeed = com->lt_out.c_ospeed = comdefaultrate; 326 327 /* 328 * if we're open, change the running rate too 329 */ 330 tp = com->tp; 331 if (tp && (tp->t_state & TS_ISOPEN)) { 332 tp->t_termios.c_ispeed = 333 tp->t_termios.c_ospeed = comdefaultrate; 334 crit_enter(); 335 error = comparam(tp, &tp->t_termios); 336 crit_exit(); 337 } 338 lwkt_reltoken(&tty_token); 339 return error; 340 } 341 342 SYSCTL_PROC(_machdep, OID_AUTO, conspeed, CTLTYPE_INT | CTLFLAG_RW, 343 0, 0, sysctl_machdep_comdefaultrate, "I", ""); 344 345 #if NPCI > 0 346 struct pci_ids { 347 u_int32_t type; 348 const char *desc; 349 int rid; 350 }; 351 352 static struct pci_ids pci_ids[] = { 353 { 0x100812b9, "3COM PCI FaxModem", 0x10 }, 354 { 0x2000131f, "CyberSerial (1-port) 16550", 0x10 }, 355 { 0x01101407, "Koutech IOFLEX-2S PCI Dual Port Serial", 0x10 }, 356 { 0x01111407, "Koutech IOFLEX-2S PCI Dual Port Serial", 0x10 }, 357 { 0x048011c1, "Lucent kermit based PCI Modem", 0x14 }, 358 { 0x95211415, "Oxford Semiconductor PCI Dual Port Serial", 0x10 }, 359 { 0x7101135e, "SeaLevel Ultra 530.PCI Single Port Serial", 0x18 }, 360 { 0x0000151f, "SmartLink 5634PCV SurfRider", 0x10 }, 361 { 0x98459710, "Netmos Nm9845 PCI Bridge with Dual UART", 0x10 }, 362 { 0x99229710, "MCS9922 PCIe Multi-I/O Controller", 0x10 }, 363 { 0x8c3d8086, "Intel Lynx Point KT Controller", 0x10 }, 364 { 0x9c3d8086, "Intel Lynx Point-LP HECI KT", 0x10 }, 365 { 0x8cbd8086, "Intel Wildcat Point KT Controller", 0x10 }, 366 { 0x9cbd8086, "Intel Wildcat Point-LP KT Controller", 0x10 }, 367 { 0x00000000, NULL, 0 } 368 }; 369 370 static int 371 sio_pci_attach(device_t dev) 372 { 373 u_int32_t type; 374 struct pci_ids *id; 375 376 type = pci_get_devid(dev); 377 id = pci_ids; 378 while (id->type && id->type != type) 379 id++; 380 if (id->desc == NULL) 381 return (ENXIO); 382 sio_pci_kludge_unit(dev); 383 return (sioattach(dev, id->rid, 0UL)); 384 } 385 386 /* 387 * Don't cut and paste this to other drivers. It is a horrible kludge 388 * which will fail to work and also be unnecessary in future versions. 389 */ 390 static void 391 sio_pci_kludge_unit(device_t dev) 392 { 393 devclass_t dc; 394 int err; 395 int start; 396 int unit; 397 398 unit = 0; 399 start = 0; 400 while (resource_int_value("sio", unit, "port", &start) == 0 && 401 start > 0) 402 unit++; 403 if (device_get_unit(dev) < unit) { 404 dc = device_get_devclass(dev); 405 while (devclass_get_device(dc, unit)) 406 unit++; 407 device_printf(dev, "moving to sio%d\n", unit); 408 err = device_set_unit(dev, unit); /* EVIL DO NOT COPY */ 409 if (err) 410 device_printf(dev, "error moving device %d\n", err); 411 } 412 } 413 414 static int 415 sio_pci_probe(device_t dev) 416 { 417 u_int32_t type; 418 struct pci_ids *id; 419 420 type = pci_get_devid(dev); 421 id = pci_ids; 422 while (id->type && id->type != type) 423 id++; 424 if (id->desc == NULL) 425 return (ENXIO); 426 device_set_desc(dev, id->desc); 427 return (sioprobe(dev, id->rid, 0UL)); 428 } 429 #endif /* NPCI > 0 */ 430 431 #if NPUC > 0 432 static int 433 sio_puc_attach(device_t dev) 434 { 435 uintptr_t rclk; 436 437 if (BUS_READ_IVAR(device_get_parent(dev), dev, PUC_IVAR_FREQ, 438 &rclk) != 0) 439 rclk = DEFAULT_RCLK; 440 return (sioattach(dev, 0, rclk)); 441 } 442 443 static int 444 sio_puc_probe(device_t dev) 445 { 446 uintptr_t rclk; 447 448 if (BUS_READ_IVAR(device_get_parent(dev), dev, PUC_IVAR_FREQ, 449 &rclk) != 0) 450 rclk = DEFAULT_RCLK; 451 return (sioprobe(dev, 0, rclk)); 452 } 453 #endif /* NPUC */ 454 455 static struct isa_pnp_id sio_ids[] = { 456 {0x0005d041, "Standard PC COM port"}, /* PNP0500 */ 457 {0x0105d041, "16550A-compatible COM port"}, /* PNP0501 */ 458 {0x0205d041, "Multiport serial device (non-intelligent 16550)"}, /* PNP0502 */ 459 {0x1005d041, "Generic IRDA-compatible device"}, /* PNP0510 */ 460 {0x1105d041, "Generic IRDA-compatible device"}, /* PNP0511 */ 461 /* Devices that do not have a compatid */ 462 {0x12206804, NULL}, /* ACH2012 - 5634BTS 56K Video Ready Modem */ 463 {0x7602a904, NULL}, /* AEI0276 - 56K v.90 Fax Modem (LKT) */ 464 {0x00007905, NULL}, /* AKY0000 - 56K Plug&Play Modem */ 465 {0x21107905, NULL}, /* AKY1021 - 56K Plug&Play Modem */ 466 {0x01405407, NULL}, /* AZT4001 - AZT3000 PnP SOUND DEVICE, MODEM */ 467 {0x56039008, NULL}, /* BDP0356 - Best Data 56x2 */ 468 {0x56159008, NULL}, /* BDP1556 - B.D. Smart One 56SPS,Voice Modem*/ 469 {0x36339008, NULL}, /* BDP3336 - Best Data Prods. 336F */ 470 {0x0014490a, NULL}, /* BRI1400 - Boca 33.6 PnP */ 471 {0x0015490a, NULL}, /* BRI1500 - Internal Fax Data */ 472 {0x0034490a, NULL}, /* BRI3400 - Internal ACF Modem */ 473 {0x0094490a, NULL}, /* BRI9400 - Boca K56Flex PnP */ 474 {0x00b4490a, NULL}, /* BRIB400 - Boca 56k PnP */ 475 {0x0030320d, NULL}, /* CIR3000 - Cirrus Logic V43 */ 476 {0x0100440e, NULL}, /* CRD0001 - Cardinal MVP288IV ? */ 477 {0x01308c0e, NULL}, /* CTL3001 - Creative Labs Phoneblaster */ 478 {0x36033610, NULL}, /* DAV0336 - DAVICOM 336PNP MODEM */ 479 {0x01009416, NULL}, /* ETT0001 - E-Tech Bullet 33k6 PnP */ 480 {0x0000aa1a, NULL}, /* FUJ0000 - FUJITSU Modem 33600 PNP/I2 */ 481 {0x1200c31e, NULL}, /* GVC0012 - VF1128HV-R9 (win modem?) */ 482 {0x0303c31e, NULL}, /* GVC0303 - MaxTech 33.6 PnP D/F/V */ 483 {0x0505c31e, NULL}, /* GVC0505 - GVC 56k Faxmodem */ 484 {0x0116c31e, NULL}, /* GVC1601 - Rockwell V.34 Plug & Play Modem */ 485 {0x0050c31e, NULL}, /* GVC5000 - some GVC modem */ 486 {0x3800f91e, NULL}, /* GWY0038 - Telepath with v.90 */ 487 {0x9062f91e, NULL}, /* GWY6290 - Telepath with x2 Technology */ 488 {0x8100e425, NULL}, /* IOD0081 - I-O DATA DEVICE,INC. IFML-560 */ 489 {0x21002534, NULL}, /* MAE0021 - Jetstream Int V.90 56k Voice Series 2*/ 490 {0x0000f435, NULL}, /* MOT0000 - Motorola ModemSURFR 33.6 Intern */ 491 {0x5015f435, NULL}, /* MOT1550 - Motorola ModemSURFR 56K Modem */ 492 {0xf015f435, NULL}, /* MOT15F0 - Motorola VoiceSURFR 56K Modem */ 493 {0x6045f435, NULL}, /* MOT4560 - Motorola ? */ 494 {0x61e7a338, NULL}, /* NECE761 - 33.6Modem */ 495 {0x08804f3f, NULL}, /* OZO8008 - Zoom (33.6k Modem) */ 496 {0x0f804f3f, NULL}, /* OZO800f - Zoom 2812 (56k Modem) */ 497 {0x39804f3f, NULL}, /* OZO8039 - Zoom 56k flex */ 498 {0x00914f3f, NULL}, /* OZO9100 - Zoom 2919 (K56 Faxmodem) */ 499 {0x3024a341, NULL}, /* PMC2430 - Pace 56 Voice Internal Modem */ 500 {0x1000eb49, NULL}, /* ROK0010 - Rockwell ? */ 501 {0x1200b23d, NULL}, /* RSS0012 - OMRON ME5614ISA */ 502 {0x5002734a, NULL}, /* RSS0250 - 5614Jx3(G) Internal Modem */ 503 {0x6202734a, NULL}, /* RSS0262 - 5614Jx3[G] V90+K56Flex Modem */ 504 {0x1010104d, NULL}, /* SHP1010 - Rockwell 33600bps Modem */ 505 {0xc100ad4d, NULL}, /* SMM00C1 - Leopard 56k PnP */ 506 {0x9012b04e, NULL}, /* SUP1290 - Supra ? */ 507 {0x1013b04e, NULL}, /* SUP1310 - SupraExpress 336i PnP */ 508 {0x8013b04e, NULL}, /* SUP1380 - SupraExpress 288i PnP Voice */ 509 {0x8113b04e, NULL}, /* SUP1381 - SupraExpress 336i PnP Voice */ 510 {0x5016b04e, NULL}, /* SUP1650 - Supra 336i Sp Intl */ 511 {0x7016b04e, NULL}, /* SUP1670 - Supra 336i V+ Intl */ 512 {0x7420b04e, NULL}, /* SUP2070 - Supra ? */ 513 {0x8020b04e, NULL}, /* SUP2080 - Supra ? */ 514 {0x8420b04e, NULL}, /* SUP2084 - SupraExpress 56i PnP */ 515 {0x7121b04e, NULL}, /* SUP2171 - SupraExpress 56i Sp? */ 516 {0x8024b04e, NULL}, /* SUP2480 - Supra ? */ 517 {0x01007256, NULL}, /* USR0001 - U.S. Robotics Inc., Sportster W */ 518 {0x02007256, NULL}, /* USR0002 - U.S. Robotics Inc. Sportster 33. */ 519 {0x04007256, NULL}, /* USR0004 - USR Sportster 14.4k */ 520 {0x06007256, NULL}, /* USR0006 - USR Sportster 33.6k */ 521 {0x11007256, NULL}, /* USR0011 - USR ? */ 522 {0x01017256, NULL}, /* USR0101 - USR ? */ 523 {0x30207256, NULL}, /* USR2030 - U.S.Robotics Inc. Sportster 560 */ 524 {0x50207256, NULL}, /* USR2050 - U.S.Robotics Inc. Sportster 33. */ 525 {0x70207256, NULL}, /* USR2070 - U.S.Robotics Inc. Sportster 560 */ 526 {0x30307256, NULL}, /* USR3030 - U.S. Robotics 56K FAX INT */ 527 {0x31307256, NULL}, /* USR3031 - U.S. Robotics 56K FAX INT */ 528 {0x50307256, NULL}, /* USR3050 - U.S. Robotics 56K FAX INT */ 529 {0x70307256, NULL}, /* USR3070 - U.S. Robotics 56K Voice INT */ 530 {0x90307256, NULL}, /* USR3090 - USR ? */ 531 {0x70917256, NULL}, /* USR9170 - U.S. Robotics 56K FAX INT */ 532 {0x90917256, NULL}, /* USR9190 - USR 56k Voice INT */ 533 {0x0300695c, NULL}, /* WCI0003 - Fax/Voice/Modem/Speakphone/Asvd */ 534 {0x01a0896a, NULL}, /* ZTIA001 - Zoom Internal V90 Faxmodem */ 535 {0x61f7896a, NULL}, /* ZTIF761 - Zoom ComStar 33.6 */ 536 {0} 537 }; 538 539 540 541 static int 542 sio_isa_probe(device_t dev) 543 { 544 /* Check isapnp ids */ 545 if (ISA_PNP_PROBE(device_get_parent(dev), dev, sio_ids) == ENXIO) 546 return (ENXIO); 547 return (sioprobe(dev, 0, 0UL)); 548 } 549 550 int 551 sioprobe(device_t dev, int xrid, u_long rclk) 552 { 553 #if 0 554 static bool_t already_init; 555 device_t xdev; 556 #endif 557 struct com_s *com; 558 u_int divisor; 559 bool_t failures[10]; 560 int fn; 561 device_t idev; 562 Port_t iobase; 563 intrmask_t irqmap[4]; 564 intrmask_t irqs; 565 u_char mcr_image; 566 int result; 567 u_long xirq; 568 u_int flags = device_get_flags(dev); 569 int rid; 570 struct resource *port; 571 572 rid = xrid; 573 port = bus_alloc_resource(dev, SYS_RES_IOPORT, &rid, 574 0, ~0, IO_COMSIZE, RF_ACTIVE); 575 if (!port) 576 return (ENXIO); 577 578 lwkt_gettoken(&tty_token); 579 com = device_get_softc(dev); 580 com->bst = rman_get_bustag(port); 581 com->bsh = rman_get_bushandle(port); 582 if (rclk == 0) 583 rclk = DEFAULT_RCLK; 584 com->rclk = rclk; 585 586 #if 0 587 /* 588 * XXX this is broken - when we are first called, there are no 589 * previously configured IO ports. We could hard code 590 * 0x3f8, 0x2f8, 0x3e8, 0x2e8 etc but that's probably worse. 591 * This code has been doing nothing since the conversion since 592 * "count" is zero the first time around. 593 */ 594 if (!already_init) { 595 /* 596 * Turn off MCR_IENABLE for all likely serial ports. An unused 597 * port with its MCR_IENABLE gate open will inhibit interrupts 598 * from any used port that shares the interrupt vector. 599 * XXX the gate enable is elsewhere for some multiports. 600 */ 601 device_t *devs; 602 int count, i, xioport; 603 604 devclass_get_devices(sio_devclass, &devs, &count); 605 for (i = 0; i < count; i++) { 606 xdev = devs[i]; 607 if (device_is_enabled(xdev) && 608 bus_get_resource(xdev, SYS_RES_IOPORT, 0, &xioport, 609 NULL) == 0) 610 outb(xioport + com_mcr, 0); 611 } 612 kfree(devs, M_TEMP); 613 already_init = TRUE; 614 } 615 #endif 616 617 if (COM_LLCONSOLE(flags)) { 618 kprintf("sio%d: reserved for low-level i/o\n", 619 device_get_unit(dev)); 620 bus_release_resource(dev, SYS_RES_IOPORT, rid, port); 621 lwkt_reltoken(&tty_token); 622 return (ENXIO); 623 } 624 625 /* 626 * If the device is on a multiport card and has an AST/4 627 * compatible interrupt control register, initialize this 628 * register and prepare to leave MCR_IENABLE clear in the mcr. 629 * Otherwise, prepare to set MCR_IENABLE in the mcr. 630 * Point idev to the device struct giving the correct id_irq. 631 * This is the struct for the master device if there is one. 632 */ 633 idev = dev; 634 mcr_image = MCR_IENABLE; 635 #ifdef COM_MULTIPORT 636 if (COM_ISMULTIPORT(flags)) { 637 Port_t xiobase; 638 u_long io; 639 640 idev = devclass_get_device(sio_devclass, COM_MPMASTER(flags)); 641 if (idev == NULL) { 642 kprintf("sio%d: master device %d not configured\n", 643 device_get_unit(dev), COM_MPMASTER(flags)); 644 idev = dev; 645 } 646 if (!COM_NOTAST4(flags)) { 647 if (bus_get_resource(idev, SYS_RES_IOPORT, 0, &io, 648 NULL) == 0) { 649 xiobase = io; 650 if (bus_get_resource(idev, SYS_RES_IRQ, 0, 651 NULL, NULL) == 0) 652 outb(xiobase + com_scr, 0x80); 653 else 654 outb(xiobase + com_scr, 0); 655 } 656 mcr_image = 0; 657 } 658 } 659 #endif /* COM_MULTIPORT */ 660 if (bus_get_resource(idev, SYS_RES_IRQ, 0, NULL, NULL) != 0) 661 mcr_image = 0; 662 663 bzero(failures, sizeof failures); 664 iobase = rman_get_start(port); 665 666 /* 667 * We don't want to get actual interrupts, just masked ones. 668 * Interrupts from this line should already be masked in the ICU, 669 * but mask them in the processor as well in case there are some 670 * (misconfigured) shared interrupts. 671 */ 672 com_lock(); 673 /* EXTRA DELAY? */ 674 675 /* 676 * For the TI16754 chips, set prescaler to 1 (4 is often the 677 * default after-reset value) as otherwise it's impossible to 678 * get highest baudrates. 679 */ 680 if (COM_TI16754(flags)) { 681 u_char cfcr, efr; 682 683 cfcr = sio_getreg(com, com_cfcr); 684 sio_setreg(com, com_cfcr, CFCR_EFR_ENABLE); 685 efr = sio_getreg(com, com_efr); 686 /* Unlock extended features to turn off prescaler. */ 687 sio_setreg(com, com_efr, efr | EFR_EFE); 688 /* Disable EFR. */ 689 sio_setreg(com, com_cfcr, (cfcr != CFCR_EFR_ENABLE) ? cfcr : 0); 690 /* Turn off prescaler. */ 691 sio_setreg(com, com_mcr, 692 sio_getreg(com, com_mcr) & ~MCR_PRESCALE); 693 sio_setreg(com, com_cfcr, CFCR_EFR_ENABLE); 694 sio_setreg(com, com_efr, efr); 695 sio_setreg(com, com_cfcr, cfcr); 696 } 697 698 /* 699 * Initialize the speed and the word size and wait long enough to 700 * drain the maximum of 16 bytes of junk in device output queues. 701 * The speed is undefined after a master reset and must be set 702 * before relying on anything related to output. There may be 703 * junk after a (very fast) soft reboot and (apparently) after 704 * master reset. 705 * XXX what about the UART bug avoided by waiting in comparam()? 706 * We don't want to to wait long enough to drain at 2 bps. 707 */ 708 if (iobase == siocniobase) { 709 DELAY((16 + 1) * 1000000 / (comdefaultrate / 10)); 710 } else { 711 sio_setreg(com, com_cfcr, CFCR_DLAB | CFCR_8BITS); 712 divisor = siodivisor(rclk, SIO_TEST_SPEED); 713 sio_setreg(com, com_dlbl, divisor & 0xff); 714 sio_setreg(com, com_dlbh, divisor >> 8); 715 sio_setreg(com, com_cfcr, CFCR_8BITS); 716 DELAY((16 + 1) * 1000000 / (SIO_TEST_SPEED / 10)); 717 } 718 719 /* 720 * Make sure we can drain the receiver. If we can't, the serial 721 * port may not exist. 722 */ 723 for (fn = 0; fn < 256; ++fn) { 724 if ((sio_getreg(com, com_lsr) & LSR_RXRDY) == 0) 725 break; 726 (void)sio_getreg(com, com_data); 727 } 728 if (fn == 256) { 729 /* 730 * Serial port might be probed but not exist, disable 731 * if so. Clear console flags if the serial port does 732 * not exist. This is very common for sio0 and sio1 733 * now and avoids unnecessary user confusion (user does 734 * not have to clear the sio0 console flag if sio0 does 735 * not exist and the user wants the console on another 736 * sio). 737 */ 738 com_unlock(); 739 lwkt_reltoken(&tty_token); 740 kprintf("sio%d: can't drain, serial port might " 741 "not exist, disabling\n", device_get_unit(dev)); 742 com->flags &= ~0x30; 743 744 return (ENXIO); 745 } 746 747 /* 748 * Enable the interrupt gate and disable device interupts. This 749 * should leave the device driving the interrupt line low and 750 * guarantee an edge trigger if an interrupt can be generated. 751 */ 752 /* EXTRA DELAY? */ 753 sio_setreg(com, com_mcr, mcr_image); 754 sio_setreg(com, com_ier, 0); 755 DELAY(1000); /* XXX */ 756 irqmap[0] = isa_irq_pending(); 757 758 /* 759 * Attempt to set loopback mode so that we can send a null byte 760 * without annoying any external device. 761 */ 762 /* EXTRA DELAY? */ 763 sio_setreg(com, com_mcr, mcr_image | MCR_LOOPBACK); 764 765 /* 766 * Attempt to generate an output interrupt. On 8250's, setting 767 * IER_ETXRDY generates an interrupt independent of the current 768 * setting and independent of whether the THR is empty. On 16450's, 769 * setting IER_ETXRDY generates an interrupt independent of the 770 * current setting. On 16550A's, setting IER_ETXRDY only 771 * generates an interrupt when IER_ETXRDY is not already set. 772 */ 773 sio_setreg(com, com_ier, IER_ETXRDY); 774 775 /* 776 * On some 16x50 incompatibles, setting IER_ETXRDY doesn't generate 777 * an interrupt. They'd better generate one for actually doing 778 * output. Loopback may be broken on the same incompatibles but 779 * it's unlikely to do more than allow the null byte out. 780 */ 781 sio_setreg(com, com_data, 0); 782 DELAY((1 + 2) * 1000000 / (SIO_TEST_SPEED / 10)); 783 784 /* 785 * Turn off loopback mode so that the interrupt gate works again 786 * (MCR_IENABLE was hidden). This should leave the device driving 787 * an interrupt line high. It doesn't matter if the interrupt 788 * line oscillates while we are not looking at it, since interrupts 789 * are disabled. 790 */ 791 /* EXTRA DELAY? */ 792 sio_setreg(com, com_mcr, mcr_image); 793 794 /* 795 * Some pcmcia cards have the "TXRDY bug", so we check everyone 796 * for IIR_TXRDY implementation ( Palido 321s, DC-1S... ) 797 */ 798 if (COM_NOPROBE(flags)) { 799 /* Reading IIR register twice */ 800 for (fn = 0; fn < 2; fn ++) { 801 DELAY(10000); 802 failures[6] = sio_getreg(com, com_iir); 803 } 804 /* Check IIR_TXRDY clear ? */ 805 result = 0; 806 if (failures[6] & IIR_TXRDY) { 807 /* Nop, Double check with clearing IER */ 808 sio_setreg(com, com_ier, 0); 809 if (sio_getreg(com, com_iir) & IIR_NOPEND) { 810 /* Ok. we're familia this gang */ 811 SET_FLAG(dev, COM_C_IIR_TXRDYBUG); 812 } else { 813 /* Unknown, Just omit this chip.. XXX */ 814 result = ENXIO; 815 sio_setreg(com, com_mcr, 0); 816 } 817 } else { 818 /* OK. this is well-known guys */ 819 CLR_FLAG(dev, COM_C_IIR_TXRDYBUG); 820 } 821 sio_setreg(com, com_ier, 0); 822 sio_setreg(com, com_cfcr, CFCR_8BITS); 823 com_unlock(); 824 bus_release_resource(dev, SYS_RES_IOPORT, rid, port); 825 lwkt_reltoken(&tty_token); 826 return (iobase == siocniobase ? 0 : result); 827 } 828 829 /* 830 * Check that 831 * o the CFCR, IER and MCR in UART hold the values written to them 832 * (the values happen to be all distinct - this is good for 833 * avoiding false positive tests from bus echoes). 834 * o an output interrupt is generated and its vector is correct. 835 * o the interrupt goes away when the IIR in the UART is read. 836 */ 837 /* EXTRA DELAY? */ 838 failures[0] = sio_getreg(com, com_cfcr) - CFCR_8BITS; 839 failures[1] = sio_getreg(com, com_ier) - IER_ETXRDY; 840 failures[2] = sio_getreg(com, com_mcr) - mcr_image; 841 DELAY(10000); /* Some internal modems need this time */ 842 irqmap[1] = isa_irq_pending(); 843 failures[4] = (sio_getreg(com, com_iir) & IIR_IMASK) - IIR_TXRDY; 844 DELAY(1000); /* XXX */ 845 irqmap[2] = isa_irq_pending(); 846 failures[6] = (sio_getreg(com, com_iir) & IIR_IMASK) - IIR_NOPEND; 847 848 /* 849 * Turn off all device interrupts and check that they go off properly. 850 * Leave MCR_IENABLE alone. For ports without a master port, it gates 851 * the OUT2 output of the UART to 852 * the ICU input. Closing the gate would give a floating ICU input 853 * (unless there is another device driving it) and spurious interrupts. 854 * (On the system that this was first tested on, the input floats high 855 * and gives a (masked) interrupt as soon as the gate is closed.) 856 */ 857 sio_setreg(com, com_ier, 0); 858 sio_setreg(com, com_cfcr, CFCR_8BITS); /* dummy to avoid bus echo */ 859 failures[7] = sio_getreg(com, com_ier); 860 DELAY(1000); /* XXX */ 861 irqmap[3] = isa_irq_pending(); 862 failures[9] = (sio_getreg(com, com_iir) & IIR_IMASK) - IIR_NOPEND; 863 864 com_unlock(); 865 866 irqs = irqmap[1] & ~irqmap[0]; 867 if (bus_get_resource(idev, SYS_RES_IRQ, 0, &xirq, NULL) == 0 && 868 ((1 << xirq) & irqs) == 0) 869 kprintf( 870 "sio%d: configured irq %ld not in bitmap of probed irqs %#x\n", 871 device_get_unit(dev), xirq, irqs); 872 if (bootverbose) 873 kprintf("sio%d: irq maps: %#x %#x %#x %#x\n", 874 device_get_unit(dev), 875 irqmap[0], irqmap[1], irqmap[2], irqmap[3]); 876 877 result = 0; 878 for (fn = 0; fn < sizeof failures; ++fn) 879 if (failures[fn]) { 880 sio_setreg(com, com_mcr, 0); 881 result = ENXIO; 882 if (bootverbose) { 883 kprintf("sio%d: probe failed test(s):", 884 device_get_unit(dev)); 885 for (fn = 0; fn < sizeof failures; ++fn) 886 if (failures[fn]) 887 kprintf(" %d", fn); 888 kprintf("\n"); 889 } 890 break; 891 } 892 bus_release_resource(dev, SYS_RES_IOPORT, rid, port); 893 lwkt_reltoken(&tty_token); 894 return (iobase == siocniobase ? 0 : result); 895 } 896 897 #ifdef COM_ESP 898 static int 899 espattach(struct com_s *com, Port_t esp_port) 900 { 901 u_char dips; 902 u_char val; 903 904 /* 905 * Check the ESP-specific I/O port to see if we're an ESP 906 * card. If not, return failure immediately. 907 */ 908 if ((inb(esp_port) & 0xf3) == 0) { 909 kprintf(" port 0x%x is not an ESP board?\n", esp_port); 910 return (0); 911 } 912 913 lwkt_gettoken(&tty_token); 914 /* 915 * We've got something that claims to be a Hayes ESP card. 916 * Let's hope so. 917 */ 918 919 /* Get the dip-switch configuration */ 920 outb(esp_port + ESP_CMD1, ESP_GETDIPS); 921 dips = inb(esp_port + ESP_STATUS1); 922 923 /* 924 * Bits 0,1 of dips say which COM port we are. 925 */ 926 if (rman_get_start(com->ioportres) == likely_com_ports[dips & 0x03]) 927 kprintf(" : ESP"); 928 else { 929 kprintf(" esp_port has com %d\n", dips & 0x03); 930 lwkt_reltoken(&tty_token); 931 return (0); 932 } 933 934 /* 935 * Check for ESP version 2.0 or later: bits 4,5,6 = 010. 936 */ 937 outb(esp_port + ESP_CMD1, ESP_GETTEST); 938 val = inb(esp_port + ESP_STATUS1); /* clear reg 1 */ 939 val = inb(esp_port + ESP_STATUS2); 940 if ((val & 0x70) < 0x20) { 941 kprintf("-old (%o)", val & 0x70); 942 lwkt_reltoken(&tty_token); 943 return (0); 944 } 945 946 /* 947 * Check for ability to emulate 16550: bit 7 == 1 948 */ 949 if ((dips & 0x80) == 0) { 950 kprintf(" slave"); 951 lwkt_reltoken(&tty_token); 952 return (0); 953 } 954 955 /* 956 * Okay, we seem to be a Hayes ESP card. Whee. 957 */ 958 com->esp = TRUE; 959 com->esp_port = esp_port; 960 lwkt_reltoken(&tty_token); 961 return (1); 962 } 963 #endif /* COM_ESP */ 964 965 static int 966 sio_isa_attach(device_t dev) 967 { 968 return (sioattach(dev, 0, 0UL)); 969 } 970 971 int 972 sioattach(device_t dev, int xrid, u_long rclk) 973 { 974 struct com_s *com; 975 #ifdef COM_ESP 976 Port_t *espp; 977 #endif 978 Port_t iobase; 979 int minorbase; 980 int unit; 981 u_int flags; 982 int rid; 983 struct resource *port; 984 int ret; 985 char tbuf[MAKEDEV_MINNBUF]; 986 char *unit_in_base32; 987 static int did_init; 988 989 lwkt_gettoken(&tty_token); 990 if (did_init == 0) { 991 did_init = 1; 992 callout_init_mp(&sio_timeout_handle); 993 } 994 995 rid = xrid; 996 port = bus_alloc_resource(dev, SYS_RES_IOPORT, &rid, 997 0, ~0, IO_COMSIZE, RF_ACTIVE); 998 if (!port) { 999 lwkt_reltoken(&tty_token); 1000 return (ENXIO); 1001 } 1002 1003 iobase = rman_get_start(port); 1004 unit = device_get_unit(dev); 1005 com = device_get_softc(dev); 1006 flags = device_get_flags(dev); 1007 1008 if (unit >= sio_numunits) 1009 sio_numunits = unit + 1; 1010 /* 1011 * sioprobe() has initialized the device registers as follows: 1012 * o cfcr = CFCR_8BITS. 1013 * It is most important that CFCR_DLAB is off, so that the 1014 * data port is not hidden when we enable interrupts. 1015 * o ier = 0. 1016 * Interrupts are only enabled when the line is open. 1017 * o mcr = MCR_IENABLE, or 0 if the port has AST/4 compatible 1018 * interrupt control register or the config specifies no irq. 1019 * Keeping MCR_DTR and MCR_RTS off might stop the external 1020 * device from sending before we are ready. 1021 */ 1022 bzero(com, sizeof *com); 1023 com->unit = unit; 1024 com->ioportres = port; 1025 com->bst = rman_get_bustag(port); 1026 com->bsh = rman_get_bushandle(port); 1027 com->cfcr_image = CFCR_8BITS; 1028 com->dtr_wait = 3 * hz; 1029 callout_init_mp(&com->dtr_ch); 1030 callout_init_mp(&com->busy_ch); 1031 com->loses_outints = COM_LOSESOUTINTS(flags) != 0; 1032 com->no_irq = bus_get_resource(dev, SYS_RES_IRQ, 0, NULL, NULL) != 0; 1033 com->tx_fifo_size = 1; 1034 com->obufs[0].l_head = com->obuf1; 1035 com->obufs[1].l_head = com->obuf2; 1036 1037 com->data_port = iobase + com_data; 1038 com->int_id_port = iobase + com_iir; 1039 com->modem_ctl_port = iobase + com_mcr; 1040 com->mcr_image = inb(com->modem_ctl_port); 1041 com->line_status_port = iobase + com_lsr; 1042 com->modem_status_port = iobase + com_msr; 1043 com->intr_ctl_port = iobase + com_ier; 1044 1045 if (rclk == 0) 1046 rclk = DEFAULT_RCLK; 1047 com->rclk = rclk; 1048 1049 /* 1050 * We don't use all the flags from <sys/ttydefaults.h> since they 1051 * are only relevant for logins. It's important to have echo off 1052 * initially so that the line doesn't start blathering before the 1053 * echo flag can be turned off. 1054 */ 1055 com->it_in.c_iflag = 0; 1056 com->it_in.c_oflag = 0; 1057 com->it_in.c_cflag = TTYDEF_CFLAG; 1058 com->it_in.c_lflag = 0; 1059 if (unit == comconsole) { 1060 com->it_in.c_iflag = TTYDEF_IFLAG; 1061 com->it_in.c_oflag = TTYDEF_OFLAG; 1062 com->it_in.c_cflag = TTYDEF_CFLAG | CLOCAL; 1063 com->it_in.c_lflag = TTYDEF_LFLAG; 1064 com->lt_out.c_cflag = com->lt_in.c_cflag = CLOCAL; 1065 com->lt_out.c_ispeed = com->lt_out.c_ospeed = 1066 com->lt_in.c_ispeed = com->lt_in.c_ospeed = 1067 com->it_in.c_ispeed = com->it_in.c_ospeed = comdefaultrate; 1068 } else 1069 com->it_in.c_ispeed = com->it_in.c_ospeed = TTYDEF_SPEED; 1070 if (siosetwater(com, com->it_in.c_ispeed) != 0) { 1071 /* 1072 * Leave i/o resources allocated if this is a `cn'-level 1073 * console, so that other devices can't snarf them. 1074 */ 1075 if (iobase != siocniobase) 1076 bus_release_resource(dev, SYS_RES_IOPORT, rid, port); 1077 lwkt_reltoken(&tty_token); 1078 return (ENOMEM); 1079 } 1080 termioschars(&com->it_in); 1081 com->it_out = com->it_in; 1082 1083 /* attempt to determine UART type */ 1084 kprintf("sio%d: type", unit); 1085 1086 1087 #ifdef COM_MULTIPORT 1088 if (!COM_ISMULTIPORT(flags) && !COM_IIR_TXRDYBUG(flags)) 1089 #else 1090 if (!COM_IIR_TXRDYBUG(flags)) 1091 #endif 1092 { 1093 u_char scr; 1094 u_char scr1; 1095 u_char scr2; 1096 1097 scr = sio_getreg(com, com_scr); 1098 sio_setreg(com, com_scr, 0xa5); 1099 scr1 = sio_getreg(com, com_scr); 1100 sio_setreg(com, com_scr, 0x5a); 1101 scr2 = sio_getreg(com, com_scr); 1102 sio_setreg(com, com_scr, scr); 1103 if (scr1 != 0xa5 || scr2 != 0x5a) { 1104 kprintf(" 8250"); 1105 goto determined_type; 1106 } 1107 } 1108 sio_setreg(com, com_fifo, FIFO_ENABLE | FIFO_RX_HIGH); 1109 DELAY(100); 1110 com->st16650a = 0; 1111 switch (inb(com->int_id_port) & IIR_FIFO_MASK) { 1112 case FIFO_RX_LOW: 1113 kprintf(" 16450"); 1114 break; 1115 case FIFO_RX_MEDL: 1116 kprintf(" 16450?"); 1117 break; 1118 case FIFO_RX_MEDH: 1119 kprintf(" 16550?"); 1120 break; 1121 case FIFO_RX_HIGH: 1122 if (COM_NOFIFO(flags)) { 1123 kprintf(" 16550A fifo disabled"); 1124 } else { 1125 com->hasfifo = TRUE; 1126 if (COM_ST16650A(flags)) { 1127 com->st16650a = 1; 1128 com->tx_fifo_size = 32; 1129 kprintf(" ST16650A"); 1130 } else if (COM_TI16754(flags)) { 1131 com->tx_fifo_size = 64; 1132 kprintf(" TI16754"); 1133 } else { 1134 com->tx_fifo_size = COM_FIFOSIZE(flags); 1135 kprintf(" 16550A"); 1136 } 1137 } 1138 #ifdef COM_ESP 1139 for (espp = likely_esp_ports; *espp != 0; espp++) 1140 if (espattach(com, *espp)) { 1141 com->tx_fifo_size = 1024; 1142 break; 1143 } 1144 #endif 1145 if (!com->st16650a && !COM_TI16754(flags)) { 1146 if (!com->tx_fifo_size) 1147 com->tx_fifo_size = 16; 1148 else 1149 kprintf(" lookalike with %d bytes FIFO", 1150 com->tx_fifo_size); 1151 } 1152 1153 break; 1154 } 1155 #ifdef COM_ESP 1156 if (com->esp) { 1157 /* 1158 * Set 16550 compatibility mode. 1159 * We don't use the ESP_MODE_SCALE bit to increase the 1160 * fifo trigger levels because we can't handle large 1161 * bursts of input. 1162 * XXX flow control should be set in comparam(), not here. 1163 */ 1164 outb(com->esp_port + ESP_CMD1, ESP_SETMODE); 1165 outb(com->esp_port + ESP_CMD2, ESP_MODE_RTS | ESP_MODE_FIFO); 1166 1167 /* Set RTS/CTS flow control. */ 1168 outb(com->esp_port + ESP_CMD1, ESP_SETFLOWTYPE); 1169 outb(com->esp_port + ESP_CMD2, ESP_FLOW_RTS); 1170 outb(com->esp_port + ESP_CMD2, ESP_FLOW_CTS); 1171 1172 /* Set flow-control levels. */ 1173 outb(com->esp_port + ESP_CMD1, ESP_SETRXFLOW); 1174 outb(com->esp_port + ESP_CMD2, HIBYTE(768)); 1175 outb(com->esp_port + ESP_CMD2, LOBYTE(768)); 1176 outb(com->esp_port + ESP_CMD2, HIBYTE(512)); 1177 outb(com->esp_port + ESP_CMD2, LOBYTE(512)); 1178 } 1179 #endif /* COM_ESP */ 1180 sio_setreg(com, com_fifo, 0); 1181 determined_type: ; 1182 1183 #ifdef COM_MULTIPORT 1184 if (COM_ISMULTIPORT(flags)) { 1185 device_t masterdev; 1186 1187 com->multiport = TRUE; 1188 kprintf(" (multiport"); 1189 if (unit == COM_MPMASTER(flags)) 1190 kprintf(" master"); 1191 kprintf(")"); 1192 masterdev = devclass_get_device(sio_devclass, 1193 COM_MPMASTER(flags)); 1194 com->no_irq = (masterdev == NULL || bus_get_resource(masterdev, 1195 SYS_RES_IRQ, 0, NULL, NULL) != 0); 1196 } 1197 #endif /* COM_MULTIPORT */ 1198 if (unit == comconsole) 1199 kprintf(", console"); 1200 if (COM_IIR_TXRDYBUG(flags)) 1201 kprintf(" with a bogus IIR_TXRDY register"); 1202 kprintf("\n"); 1203 1204 if (!sio_registered) { 1205 register_swi_mp(SWI_TTY, siopoll, NULL, 1206 "swi_siopoll", NULL, -1); 1207 sio_registered = TRUE; 1208 } 1209 minorbase = UNIT_TO_MINOR(unit); 1210 unit_in_base32 = makedev_unit_b32(tbuf, unit); 1211 make_dev(&sio_ops, minorbase, 1212 UID_ROOT, GID_WHEEL, 0600, "ttyd%s", unit_in_base32); 1213 make_dev(&sio_ops, minorbase | CONTROL_INIT_STATE, 1214 UID_ROOT, GID_WHEEL, 0600, "ttyid%s", unit_in_base32); 1215 make_dev(&sio_ops, minorbase | CONTROL_LOCK_STATE, 1216 UID_ROOT, GID_WHEEL, 0600, "ttyld%s", unit_in_base32); 1217 make_dev(&sio_ops, minorbase | CALLOUT_MASK, 1218 UID_UUCP, GID_DIALER, 0660, "cuaa%s", unit_in_base32); 1219 make_dev(&sio_ops, minorbase | CALLOUT_MASK | CONTROL_INIT_STATE, 1220 UID_UUCP, GID_DIALER, 0660, "cuaia%s", unit_in_base32); 1221 make_dev(&sio_ops, minorbase | CALLOUT_MASK | CONTROL_LOCK_STATE, 1222 UID_UUCP, GID_DIALER, 0660, "cuala%s", unit_in_base32); 1223 com->flags = flags; 1224 com->pps.ppscap = PPS_CAPTUREASSERT | PPS_CAPTURECLEAR; 1225 pps_init(&com->pps); 1226 1227 rid = 0; 1228 com->irqres = bus_alloc_resource(dev, SYS_RES_IRQ, &rid, 0ul, ~0ul, 1, 1229 RF_ACTIVE); 1230 if (com->irqres) { 1231 ret = BUS_SETUP_INTR(device_get_parent(dev), dev, 1232 com->irqres, INTR_MPSAFE, siointr, com, 1233 &com->cookie, NULL, NULL); 1234 if (ret) 1235 device_printf(dev, "could not activate interrupt\n"); 1236 #if defined(DDB) 1237 /* 1238 * Enable interrupts for early break-to-debugger support 1239 * on the console. 1240 */ 1241 if (ret == 0 && unit == comconsole && 1242 (break_to_debugger || alt_break_to_debugger)) { 1243 inb(siocniobase + com_data); 1244 outb(siocniobase + com_ier, 1245 IER_ERXRDY | IER_ERLS | IER_EMSC); 1246 } 1247 #endif 1248 } 1249 1250 lwkt_reltoken(&tty_token); 1251 return (0); 1252 } 1253 1254 static int 1255 sioopen(struct dev_open_args *ap) 1256 { 1257 cdev_t dev = ap->a_head.a_dev; 1258 struct com_s *com; 1259 int error; 1260 int mynor; 1261 struct tty *tp; 1262 int unit; 1263 1264 mynor = minor(dev); 1265 unit = MINOR_TO_UNIT(mynor); 1266 com = com_addr(unit); 1267 if (com == NULL) 1268 return (ENXIO); 1269 if (com->gone) 1270 return (ENXIO); 1271 if (mynor & CONTROL_MASK) 1272 return (0); 1273 lwkt_gettoken(&tty_token); 1274 tp = ttymalloc(&com->tp); 1275 dev->si_tty = tp; 1276 crit_enter(); 1277 /* 1278 * We jump to this label after all non-interrupted sleeps to pick 1279 * up any changes of the device state. 1280 */ 1281 open_top: 1282 while (com->state & CS_DTR_OFF) { 1283 error = tsleep(&com->dtr_wait, PCATCH, "siodtr", 0); 1284 if (com_addr(unit) == NULL) { 1285 crit_exit(); 1286 lwkt_reltoken(&tty_token); 1287 return (ENXIO); 1288 } 1289 if (error != 0 || com->gone) 1290 goto out; 1291 } 1292 if (tp->t_state & TS_ISOPEN) { 1293 /* 1294 * The device is open, so everything has been initialized. 1295 * Handle conflicts. 1296 */ 1297 if (mynor & CALLOUT_MASK) { 1298 if (!com->active_out) { 1299 error = EBUSY; 1300 goto out; 1301 } 1302 } else { 1303 if (com->active_out) { 1304 if (ap->a_oflags & O_NONBLOCK) { 1305 error = EBUSY; 1306 goto out; 1307 } 1308 error = tsleep(&com->active_out, 1309 PCATCH, "siobi", 0); 1310 if (com_addr(unit) == NULL) { 1311 crit_exit(); 1312 lwkt_reltoken(&tty_token); 1313 return (ENXIO); 1314 } 1315 if (error != 0 || com->gone) 1316 goto out; 1317 goto open_top; 1318 } 1319 } 1320 if (tp->t_state & TS_XCLUDE && priv_check_cred(ap->a_cred, PRIV_ROOT, 0)) { 1321 error = EBUSY; 1322 goto out; 1323 } 1324 } else { 1325 /* 1326 * The device isn't open, so there are no conflicts. 1327 * Initialize it. Initialization is done twice in many 1328 * cases: to preempt sleeping callin opens if we are 1329 * callout, and to complete a callin open after DCD rises. 1330 */ 1331 tp->t_oproc = comstart; 1332 tp->t_param = comparam; 1333 tp->t_stop = comstop; 1334 tp->t_dev = dev; 1335 tp->t_termios = mynor & CALLOUT_MASK 1336 ? com->it_out : com->it_in; 1337 (void)commctl(com, TIOCM_DTR | TIOCM_RTS, DMSET); 1338 com->poll = com->no_irq; 1339 com->poll_output = com->loses_outints; 1340 ++com->wopeners; 1341 error = comparam(tp, &tp->t_termios); 1342 --com->wopeners; 1343 if (error != 0) 1344 goto out; 1345 /* 1346 * XXX we should goto open_top if comparam() slept. 1347 */ 1348 if (com->hasfifo) { 1349 /* 1350 * (Re)enable and drain fifos. 1351 * 1352 * Certain SMC chips cause problems if the fifos 1353 * are enabled while input is ready. Turn off the 1354 * fifo if necessary to clear the input. We test 1355 * the input ready bit after enabling the fifos 1356 * since we've already enabled them in comparam() 1357 * and to handle races between enabling and fresh 1358 * input. 1359 */ 1360 while (TRUE) { 1361 sio_setreg(com, com_fifo, 1362 FIFO_RCV_RST | FIFO_XMT_RST 1363 | com->fifo_image); 1364 /* 1365 * XXX the delays are for superstitious 1366 * historical reasons. It must be less than 1367 * the character time at the maximum 1368 * supported speed (87 usec at 115200 bps 1369 * 8N1). Otherwise we might loop endlessly 1370 * if data is streaming in. We used to use 1371 * delays of 100. That usually worked 1372 * because DELAY(100) used to usually delay 1373 * for about 85 usec instead of 100. 1374 */ 1375 DELAY(50); 1376 if (!(inb(com->line_status_port) & LSR_RXRDY)) 1377 break; 1378 sio_setreg(com, com_fifo, 0); 1379 DELAY(50); 1380 (void) inb(com->data_port); 1381 } 1382 } 1383 1384 com_lock(); 1385 (void) inb(com->line_status_port); 1386 (void) inb(com->data_port); 1387 com->prev_modem_status = com->last_modem_status 1388 = inb(com->modem_status_port); 1389 if (COM_IIR_TXRDYBUG(com->flags)) { 1390 outb(com->intr_ctl_port, IER_ERXRDY | IER_ERLS 1391 | IER_EMSC); 1392 } else { 1393 outb(com->intr_ctl_port, IER_ERXRDY | IER_ETXRDY 1394 | IER_ERLS | IER_EMSC); 1395 } 1396 com_unlock(); 1397 /* 1398 * Handle initial DCD. Callout devices get a fake initial 1399 * DCD (trapdoor DCD). If we are callout, then any sleeping 1400 * callin opens get woken up and resume sleeping on "siobi" 1401 * instead of "siodcd". 1402 */ 1403 /* 1404 * XXX `mynor & CALLOUT_MASK' should be 1405 * `tp->t_cflag & (SOFT_CARRIER | TRAPDOOR_CARRIER) where 1406 * TRAPDOOR_CARRIER is the default initial state for callout 1407 * devices and SOFT_CARRIER is like CLOCAL except it hides 1408 * the true carrier. 1409 */ 1410 if (com->prev_modem_status & MSR_DCD || mynor & CALLOUT_MASK) 1411 (*linesw[tp->t_line].l_modem)(tp, 1); 1412 } 1413 /* 1414 * Wait for DCD if necessary. 1415 */ 1416 if (!(tp->t_state & TS_CARR_ON) && !(mynor & CALLOUT_MASK) 1417 && !(tp->t_cflag & CLOCAL) && !(ap->a_oflags & O_NONBLOCK)) { 1418 ++com->wopeners; 1419 error = tsleep(TSA_CARR_ON(tp), PCATCH, "siodcd", 0); 1420 if (com_addr(unit) == NULL) { 1421 crit_exit(); 1422 lwkt_reltoken(&tty_token); 1423 return (ENXIO); 1424 } 1425 --com->wopeners; 1426 if (error != 0 || com->gone) 1427 goto out; 1428 goto open_top; 1429 } 1430 error = (*linesw[tp->t_line].l_open)(dev, tp); 1431 disc_optim(tp, &tp->t_termios, com); 1432 if (tp->t_state & TS_ISOPEN && mynor & CALLOUT_MASK) 1433 com->active_out = TRUE; 1434 siosettimeout(); 1435 out: 1436 crit_exit(); 1437 if (!(tp->t_state & TS_ISOPEN) && com->wopeners == 0) 1438 comhardclose(com); 1439 lwkt_reltoken(&tty_token); 1440 return (error); 1441 } 1442 1443 static int 1444 sioclose(struct dev_close_args *ap) 1445 { 1446 cdev_t dev = ap->a_head.a_dev; 1447 struct com_s *com; 1448 int mynor; 1449 struct tty *tp; 1450 1451 mynor = minor(dev); 1452 if (mynor & CONTROL_MASK) 1453 return (0); 1454 lwkt_gettoken(&tty_token); 1455 com = com_addr(MINOR_TO_UNIT(mynor)); 1456 if (com == NULL) { 1457 lwkt_reltoken(&tty_token); 1458 return (ENODEV); 1459 } 1460 tp = com->tp; 1461 crit_enter(); 1462 (*linesw[tp->t_line].l_close)(tp, ap->a_fflag); 1463 disc_optim(tp, &tp->t_termios, com); 1464 comstop(tp, FREAD | FWRITE); 1465 comhardclose(com); 1466 ttyclose(tp); 1467 siosettimeout(); 1468 crit_exit(); 1469 if (com->gone) { 1470 kprintf("sio%d: gone\n", com->unit); 1471 crit_enter(); 1472 if (com->ibuf != NULL) 1473 kfree(com->ibuf, M_DEVBUF); 1474 bzero(tp, sizeof *tp); 1475 crit_exit(); 1476 } 1477 lwkt_reltoken(&tty_token); 1478 return (0); 1479 } 1480 1481 static void 1482 comhardclose(struct com_s *com) 1483 { 1484 struct tty *tp; 1485 crit_enter(); 1486 lwkt_gettoken(&tty_token); 1487 com->poll = FALSE; 1488 com->poll_output = FALSE; 1489 com->do_timestamp = FALSE; 1490 com->do_dcd_timestamp = FALSE; 1491 com->pps.ppsparam.mode = 0; 1492 sio_setreg(com, com_cfcr, com->cfcr_image &= ~CFCR_SBREAK); 1493 tp = com->tp; 1494 1495 #if defined(DDB) 1496 /* 1497 * Leave interrupts enabled and don't clear DTR if this is the 1498 * console. This allows us to detect break-to-debugger events 1499 * while the console device is closed. 1500 */ 1501 if (com->unit != comconsole || 1502 (break_to_debugger == 0 && alt_break_to_debugger == 0)) 1503 #endif 1504 { 1505 sio_setreg(com, com_ier, 0); 1506 if (tp->t_cflag & HUPCL 1507 /* 1508 * XXX we will miss any carrier drop between here and the 1509 * next open. Perhaps we should watch DCD even when the 1510 * port is closed; it is not sufficient to check it at 1511 * the next open because it might go up and down while 1512 * we're not watching. 1513 */ 1514 || (!com->active_out 1515 && !(com->prev_modem_status & MSR_DCD) 1516 && !(com->it_in.c_cflag & CLOCAL)) 1517 || !(tp->t_state & TS_ISOPEN)) { 1518 (void)commctl(com, TIOCM_DTR, DMBIC); 1519 if (com->dtr_wait != 0 && !(com->state & CS_DTR_OFF)) { 1520 callout_reset(&com->dtr_ch, com->dtr_wait, 1521 siodtrwakeup, com); 1522 com->state |= CS_DTR_OFF; 1523 } 1524 } 1525 } 1526 if (com->hasfifo) { 1527 /* 1528 * Disable fifos so that they are off after controlled 1529 * reboots. Some BIOSes fail to detect 16550s when the 1530 * fifos are enabled. 1531 */ 1532 sio_setreg(com, com_fifo, 0); 1533 } 1534 com->active_out = FALSE; 1535 wakeup(&com->active_out); 1536 wakeup(TSA_CARR_ON(tp)); /* restart any wopeners */ 1537 lwkt_reltoken(&tty_token); 1538 crit_exit(); 1539 } 1540 1541 static int 1542 sioread(struct dev_read_args *ap) 1543 { 1544 cdev_t dev = ap->a_head.a_dev; 1545 int mynor, ret; 1546 struct com_s *com; 1547 1548 lwkt_gettoken(&tty_token); 1549 mynor = minor(dev); 1550 if (mynor & CONTROL_MASK) { 1551 lwkt_reltoken(&tty_token); 1552 return (ENODEV); 1553 } 1554 com = com_addr(MINOR_TO_UNIT(mynor)); 1555 if (com == NULL || com->gone) { 1556 lwkt_reltoken(&tty_token); 1557 return (ENODEV); 1558 } 1559 ret = ((*linesw[com->tp->t_line].l_read)(com->tp, ap->a_uio, ap->a_ioflag)); 1560 lwkt_reltoken(&tty_token); 1561 return ret; 1562 } 1563 1564 static int 1565 siowrite(struct dev_write_args *ap) 1566 { 1567 cdev_t dev = ap->a_head.a_dev; 1568 int mynor; 1569 struct com_s *com; 1570 int unit, ret; 1571 1572 lwkt_gettoken(&tty_token); 1573 mynor = minor(dev); 1574 if (mynor & CONTROL_MASK) { 1575 lwkt_reltoken(&tty_token); 1576 return (ENODEV); 1577 } 1578 1579 unit = MINOR_TO_UNIT(mynor); 1580 com = com_addr(unit); 1581 if (com == NULL || com->gone) { 1582 lwkt_reltoken(&tty_token); 1583 return (ENODEV); 1584 } 1585 /* 1586 * (XXX) We disallow virtual consoles if the physical console is 1587 * a serial port. This is in case there is a display attached that 1588 * is not the console. In that situation we don't need/want the X 1589 * server taking over the console. 1590 */ 1591 if (constty != NULL && unit == comconsole) 1592 constty = NULL; 1593 ret = ((*linesw[com->tp->t_line].l_write)(com->tp, ap->a_uio, ap->a_ioflag)); 1594 lwkt_reltoken(&tty_token); 1595 return ret; 1596 } 1597 1598 static void 1599 siobusycheck(void *chan) 1600 { 1601 struct com_s *com; 1602 1603 lwkt_gettoken(&tty_token); 1604 com = (struct com_s *)chan; 1605 1606 /* 1607 * Clear TS_BUSY if low-level output is complete. 1608 * spl locking is sufficient because siointr1() does not set CS_BUSY. 1609 * If siointr1() clears CS_BUSY after we look at it, then we'll get 1610 * called again. Reading the line status port outside of siointr1() 1611 * is safe because CS_BUSY is clear so there are no output interrupts 1612 * to lose. 1613 */ 1614 crit_enter(); 1615 if (com->state & CS_BUSY) 1616 com->extra_state &= ~CSE_BUSYCHECK; /* False alarm. */ 1617 else if ((inb(com->line_status_port) & (LSR_TSRE | LSR_TXRDY)) 1618 == (LSR_TSRE | LSR_TXRDY)) { 1619 com->tp->t_state &= ~TS_BUSY; 1620 ttwwakeup(com->tp); 1621 com->extra_state &= ~CSE_BUSYCHECK; 1622 } else { 1623 callout_reset(&com->busy_ch, hz / 100, siobusycheck, com); 1624 } 1625 crit_exit(); 1626 lwkt_reltoken(&tty_token); 1627 } 1628 1629 static u_int 1630 siodivisor(u_long rclk, speed_t speed) 1631 { 1632 long actual_speed; 1633 u_int divisor; 1634 int error; 1635 1636 if (speed == 0 || speed > ((speed_t)-1 - 1) / 8) 1637 return (0); 1638 divisor = (rclk / (8UL * speed) + 1) / 2; 1639 if (divisor == 0 || divisor >= 65536) 1640 return (0); 1641 actual_speed = rclk / (16UL * divisor); 1642 1643 /* 10 times error in percent: */ 1644 error = ((actual_speed - (long)speed) * 2000 / (long)speed + 1) / 2; 1645 1646 /* 3.0% maximum error tolerance: */ 1647 if (error < -30 || error > 30) 1648 return (0); 1649 1650 return (divisor); 1651 } 1652 1653 static void 1654 siodtrwakeup(void *chan) 1655 { 1656 struct com_s *com; 1657 1658 lwkt_gettoken(&tty_token); 1659 com = (struct com_s *)chan; 1660 com->state &= ~CS_DTR_OFF; 1661 wakeup(&com->dtr_wait); 1662 lwkt_reltoken(&tty_token); 1663 } 1664 1665 /* 1666 * NOTE: Normally called with tty_token held but might not be when 1667 * operating as the console. 1668 * 1669 * Must be called with com_lock 1670 */ 1671 static void 1672 sioinput(struct com_s *com) 1673 { 1674 u_char *buf; 1675 int incc; 1676 u_char line_status; 1677 int recv_data; 1678 struct tty *tp; 1679 1680 buf = com->ibuf; 1681 tp = com->tp; 1682 if (!(tp->t_state & TS_ISOPEN) || !(tp->t_cflag & CREAD)) { 1683 com_events -= (com->iptr - com->ibuf); 1684 com->iptr = com->ibuf; 1685 return; 1686 } 1687 if (tp->t_state & TS_CAN_BYPASS_L_RINT) { 1688 /* 1689 * Avoid the grotesquely inefficient lineswitch routine 1690 * (ttyinput) in "raw" mode. It usually takes about 450 1691 * instructions (that's without canonical processing or echo!). 1692 * slinput is reasonably fast (usually 40 instructions plus 1693 * call overhead). 1694 */ 1695 do { 1696 com_unlock(); 1697 incc = com->iptr - buf; 1698 if (tp->t_rawq.c_cc + incc > tp->t_ihiwat 1699 && (com->state & CS_RTS_IFLOW 1700 || tp->t_iflag & IXOFF) 1701 && !(tp->t_state & TS_TBLOCK)) 1702 ttyblock(tp); 1703 com->delta_error_counts[CE_TTY_BUF_OVERFLOW] 1704 += clist_btoq((char *)buf, incc, &tp->t_rawq); 1705 buf += incc; 1706 tk_nin += incc; 1707 tk_rawcc += incc; 1708 tp->t_rawcc += incc; 1709 ttwakeup(tp); 1710 if (tp->t_state & TS_TTSTOP 1711 && (tp->t_iflag & IXANY 1712 || tp->t_cc[VSTART] == tp->t_cc[VSTOP])) { 1713 tp->t_state &= ~TS_TTSTOP; 1714 tp->t_lflag &= ~FLUSHO; 1715 comstart(tp); 1716 } 1717 com_lock(); 1718 } while (buf < com->iptr); 1719 } else { 1720 do { 1721 com_unlock(); 1722 line_status = buf[com->ierroff]; 1723 recv_data = *buf++; 1724 if (line_status 1725 & (LSR_BI | LSR_FE | LSR_OE | LSR_PE)) { 1726 if (line_status & LSR_BI) 1727 recv_data |= TTY_BI; 1728 if (line_status & LSR_FE) 1729 recv_data |= TTY_FE; 1730 if (line_status & LSR_OE) 1731 recv_data |= TTY_OE; 1732 if (line_status & LSR_PE) 1733 recv_data |= TTY_PE; 1734 } 1735 (*linesw[tp->t_line].l_rint)(recv_data, tp); 1736 com_lock(); 1737 } while (buf < com->iptr); 1738 } 1739 com_events -= (com->iptr - com->ibuf); 1740 com->iptr = com->ibuf; 1741 1742 /* 1743 * There is now room for another low-level buffer full of input, 1744 * so enable RTS if it is now disabled and there is room in the 1745 * high-level buffer. 1746 */ 1747 if ((com->state & CS_RTS_IFLOW) && !(com->mcr_image & MCR_RTS) && 1748 !(tp->t_state & TS_TBLOCK)) 1749 outb(com->modem_ctl_port, com->mcr_image |= MCR_RTS); 1750 } 1751 1752 static void 1753 siointr(void *arg) 1754 { 1755 lwkt_gettoken(&tty_token); 1756 #ifndef COM_MULTIPORT 1757 com_lock(); 1758 siointr1((struct com_s *) arg); 1759 com_unlock(); 1760 #else /* COM_MULTIPORT */ 1761 bool_t possibly_more_intrs; 1762 int unit; 1763 struct com_s *com; 1764 1765 /* 1766 * Loop until there is no activity on any port. This is necessary 1767 * to get an interrupt edge more than to avoid another interrupt. 1768 * If the IRQ signal is just an OR of the IRQ signals from several 1769 * devices, then the edge from one may be lost because another is 1770 * on. 1771 */ 1772 com_lock(); 1773 do { 1774 possibly_more_intrs = FALSE; 1775 for (unit = 0; unit < sio_numunits; ++unit) { 1776 com = com_addr(unit); 1777 /* 1778 * XXX com_lock(); 1779 * would it work here, or be counter-productive? 1780 */ 1781 if (com != NULL 1782 && !com->gone 1783 && (inb(com->int_id_port) & IIR_IMASK) 1784 != IIR_NOPEND) { 1785 siointr1(com); 1786 possibly_more_intrs = TRUE; 1787 } 1788 /* XXX com_unlock(); */ 1789 } 1790 } while (possibly_more_intrs); 1791 com_unlock(); 1792 #endif /* COM_MULTIPORT */ 1793 lwkt_reltoken(&tty_token); 1794 } 1795 1796 /* 1797 * Called with tty_token held and com_lock held. 1798 */ 1799 static void 1800 siointr1(struct com_s *com) 1801 { 1802 u_char line_status; 1803 u_char modem_status; 1804 u_char *ioptr; 1805 u_char recv_data; 1806 u_char int_ctl; 1807 u_char int_ctl_new; 1808 sysclock_t count; 1809 1810 int_ctl = inb(com->intr_ctl_port); 1811 int_ctl_new = int_ctl; 1812 1813 while (!com->gone) { 1814 if (com->pps.ppsparam.mode & PPS_CAPTUREBOTH) { 1815 modem_status = inb(com->modem_status_port); 1816 if ((modem_status ^ com->last_modem_status) & MSR_DCD) { 1817 count = sys_cputimer->count(); 1818 pps_event(&com->pps, count, 1819 (modem_status & MSR_DCD) ? 1820 PPS_CAPTUREASSERT : PPS_CAPTURECLEAR); 1821 } 1822 } 1823 line_status = inb(com->line_status_port); 1824 1825 /* input event? (check first to help avoid overruns) */ 1826 while (line_status & LSR_RCV_MASK) { 1827 /* break/unnattached error bits or real input? */ 1828 if (!(line_status & LSR_RXRDY)) 1829 recv_data = 0; 1830 else 1831 recv_data = inb(com->data_port); 1832 #if defined(DDB) 1833 /* 1834 * Solaris implements a new BREAK which is initiated 1835 * by a character sequence CR ~ ^b which is similar 1836 * to a familiar pattern used on Sun servers by the 1837 * Remote Console. 1838 */ 1839 #define KEY_CRTLB 2 /* ^B */ 1840 #define KEY_CR 13 /* CR '\r' */ 1841 #define KEY_TILDE 126 /* ~ */ 1842 1843 if (com->unit == comconsole && alt_break_to_debugger) { 1844 static int brk_state1 = 0, brk_state2 = 0; 1845 if (recv_data == KEY_CR) { 1846 brk_state1 = recv_data; 1847 brk_state2 = 0; 1848 } else if (brk_state1 == KEY_CR && (recv_data == KEY_TILDE || recv_data == KEY_CRTLB)) { 1849 if (recv_data == KEY_TILDE) 1850 brk_state2 = recv_data; 1851 else if (brk_state2 == KEY_TILDE && recv_data == KEY_CRTLB) { 1852 com_unlock(); 1853 breakpoint(); 1854 com_lock(); 1855 brk_state1 = brk_state2 = 0; 1856 goto cont; 1857 } else 1858 brk_state2 = 0; 1859 } else 1860 brk_state1 = 0; 1861 } 1862 #endif 1863 if (line_status & (LSR_BI | LSR_FE | LSR_PE)) { 1864 /* 1865 * Don't store BI if IGNBRK or FE/PE if IGNPAR. 1866 * Otherwise, push the work to a higher level 1867 * (to handle PARMRK) if we're bypassing. 1868 * Otherwise, convert BI/FE and PE+INPCK to 0. 1869 * 1870 * This makes bypassing work right in the 1871 * usual "raw" case (IGNBRK set, and IGNPAR 1872 * and INPCK clear). 1873 * 1874 * Note: BI together with FE/PE means just BI. 1875 */ 1876 if (line_status & LSR_BI) { 1877 #if defined(DDB) 1878 if (com->unit == comconsole && 1879 break_to_debugger) { 1880 com_unlock(); 1881 breakpoint(); 1882 com_lock(); 1883 goto cont; 1884 } 1885 #endif 1886 if (com->tp == NULL 1887 || com->tp->t_iflag & IGNBRK) 1888 goto cont; 1889 } else { 1890 if (com->tp == NULL 1891 || com->tp->t_iflag & IGNPAR) 1892 goto cont; 1893 } 1894 if (com->tp->t_state & TS_CAN_BYPASS_L_RINT 1895 && (line_status & (LSR_BI | LSR_FE) 1896 || com->tp->t_iflag & INPCK)) 1897 recv_data = 0; 1898 } 1899 ++com->bytes_in; 1900 if (com->hotchar != 0 && recv_data == com->hotchar) 1901 setsofttty(); 1902 ioptr = com->iptr; 1903 if (ioptr >= com->ibufend) 1904 CE_RECORD(com, CE_INTERRUPT_BUF_OVERFLOW); 1905 else { 1906 if (com->do_timestamp) 1907 microtime(&com->timestamp); 1908 ++com_events; 1909 schedsofttty(); 1910 #if 0 /* for testing input latency vs efficiency */ 1911 if (com->iptr - com->ibuf == 8) 1912 setsofttty(); 1913 #endif 1914 ioptr[0] = recv_data; 1915 ioptr[com->ierroff] = line_status; 1916 com->iptr = ++ioptr; 1917 if (ioptr == com->ihighwater 1918 && com->state & CS_RTS_IFLOW) 1919 outb(com->modem_ctl_port, 1920 com->mcr_image &= ~MCR_RTS); 1921 if (line_status & LSR_OE) 1922 CE_RECORD(com, CE_OVERRUN); 1923 } 1924 cont: 1925 /* 1926 * "& 0x7F" is to avoid the gcc-1.40 generating a slow 1927 * jump from the top of the loop to here 1928 */ 1929 line_status = inb(com->line_status_port) & 0x7F; 1930 } 1931 1932 /* modem status change? (always check before doing output) */ 1933 modem_status = inb(com->modem_status_port); 1934 if (modem_status != com->last_modem_status) { 1935 if (com->do_dcd_timestamp 1936 && !(com->last_modem_status & MSR_DCD) 1937 && modem_status & MSR_DCD) 1938 microtime(&com->dcd_timestamp); 1939 1940 /* 1941 * Schedule high level to handle DCD changes. Note 1942 * that we don't use the delta bits anywhere. Some 1943 * UARTs mess them up, and it's easy to remember the 1944 * previous bits and calculate the delta. 1945 */ 1946 com->last_modem_status = modem_status; 1947 if (!(com->state & CS_CHECKMSR)) { 1948 com_events += LOTS_OF_EVENTS; 1949 com->state |= CS_CHECKMSR; 1950 setsofttty(); 1951 } 1952 1953 /* handle CTS change immediately for crisp flow ctl */ 1954 if (com->state & CS_CTS_OFLOW) { 1955 if (modem_status & MSR_CTS) 1956 com->state |= CS_ODEVREADY; 1957 else 1958 com->state &= ~CS_ODEVREADY; 1959 } 1960 } 1961 1962 /* output queued and everything ready? */ 1963 if ((line_status & LSR_TXRDY) 1964 && com->state >= (CS_BUSY | CS_TTGO | CS_ODEVREADY)) { 1965 ioptr = com->obufq.l_head; 1966 if (com->tx_fifo_size > 1) { 1967 u_int ocount; 1968 1969 ocount = com->obufq.l_tail - ioptr; 1970 if (ocount > com->tx_fifo_size) 1971 ocount = com->tx_fifo_size; 1972 com->bytes_out += ocount; 1973 do 1974 outb(com->data_port, *ioptr++); 1975 while (--ocount != 0); 1976 } else { 1977 outb(com->data_port, *ioptr++); 1978 ++com->bytes_out; 1979 } 1980 com->obufq.l_head = ioptr; 1981 if (COM_IIR_TXRDYBUG(com->flags)) { 1982 int_ctl_new = int_ctl | IER_ETXRDY; 1983 } 1984 if (ioptr >= com->obufq.l_tail) { 1985 struct lbq *qp; 1986 1987 qp = com->obufq.l_next; 1988 qp->l_queued = FALSE; 1989 qp = qp->l_next; 1990 if (qp != NULL) { 1991 com->obufq.l_head = qp->l_head; 1992 com->obufq.l_tail = qp->l_tail; 1993 com->obufq.l_next = qp; 1994 } else { 1995 /* output just completed */ 1996 if (COM_IIR_TXRDYBUG(com->flags)) { 1997 int_ctl_new = int_ctl & ~IER_ETXRDY; 1998 } 1999 com->state &= ~CS_BUSY; 2000 } 2001 if (!(com->state & CS_ODONE)) { 2002 com_events += LOTS_OF_EVENTS; 2003 com->state |= CS_ODONE; 2004 setsofttty(); /* handle at high level ASAP */ 2005 } 2006 } 2007 if (COM_IIR_TXRDYBUG(com->flags) && (int_ctl != int_ctl_new)) { 2008 outb(com->intr_ctl_port, int_ctl_new); 2009 } 2010 } 2011 2012 /* finished? */ 2013 #ifdef COM_MULTIPORT 2014 return; 2015 #else 2016 if (inb(com->int_id_port) & IIR_NOPEND) 2017 return; 2018 #endif 2019 } 2020 } 2021 2022 static int 2023 sioioctl(struct dev_ioctl_args *ap) 2024 { 2025 cdev_t dev = ap->a_head.a_dev; 2026 caddr_t data = ap->a_data; 2027 struct com_s *com; 2028 int error; 2029 int mynor; 2030 struct tty *tp; 2031 2032 lwkt_gettoken(&tty_token); 2033 mynor = minor(dev); 2034 2035 com = com_addr(MINOR_TO_UNIT(mynor)); 2036 if (com == NULL || com->gone) { 2037 lwkt_reltoken(&tty_token); 2038 return (ENODEV); 2039 } 2040 if (mynor & CONTROL_MASK) { 2041 struct termios *ct; 2042 2043 switch (mynor & CONTROL_MASK) { 2044 case CONTROL_INIT_STATE: 2045 ct = mynor & CALLOUT_MASK ? &com->it_out : &com->it_in; 2046 break; 2047 case CONTROL_LOCK_STATE: 2048 ct = mynor & CALLOUT_MASK ? &com->lt_out : &com->lt_in; 2049 break; 2050 default: 2051 lwkt_reltoken(&tty_token); 2052 return (ENODEV); /* /dev/nodev */ 2053 } 2054 switch (ap->a_cmd) { 2055 case TIOCSETA: 2056 error = priv_check_cred(ap->a_cred, PRIV_ROOT, 0); 2057 if (error != 0) { 2058 lwkt_reltoken(&tty_token); 2059 return (error); 2060 } 2061 *ct = *(struct termios *)data; 2062 lwkt_reltoken(&tty_token); 2063 return (0); 2064 case TIOCGETA: 2065 *(struct termios *)data = *ct; 2066 lwkt_reltoken(&tty_token); 2067 return (0); 2068 case TIOCGETD: 2069 *(int *)data = TTYDISC; 2070 lwkt_reltoken(&tty_token); 2071 return (0); 2072 case TIOCGWINSZ: 2073 bzero(data, sizeof(struct winsize)); 2074 lwkt_reltoken(&tty_token); 2075 return (0); 2076 default: 2077 lwkt_reltoken(&tty_token); 2078 return (ENOTTY); 2079 } 2080 } 2081 tp = com->tp; 2082 if (ap->a_cmd == TIOCSETA || ap->a_cmd == TIOCSETAW || 2083 ap->a_cmd == TIOCSETAF) { 2084 int cc; 2085 struct termios *dt = (struct termios *)data; 2086 struct termios *lt = mynor & CALLOUT_MASK 2087 ? &com->lt_out : &com->lt_in; 2088 2089 dt->c_iflag = (tp->t_iflag & lt->c_iflag) 2090 | (dt->c_iflag & ~lt->c_iflag); 2091 dt->c_oflag = (tp->t_oflag & lt->c_oflag) 2092 | (dt->c_oflag & ~lt->c_oflag); 2093 dt->c_cflag = (tp->t_cflag & lt->c_cflag) 2094 | (dt->c_cflag & ~lt->c_cflag); 2095 dt->c_lflag = (tp->t_lflag & lt->c_lflag) 2096 | (dt->c_lflag & ~lt->c_lflag); 2097 for (cc = 0; cc < NCCS; ++cc) 2098 if (lt->c_cc[cc] != 0) 2099 dt->c_cc[cc] = tp->t_cc[cc]; 2100 if (lt->c_ispeed != 0) 2101 dt->c_ispeed = tp->t_ispeed; 2102 if (lt->c_ospeed != 0) 2103 dt->c_ospeed = tp->t_ospeed; 2104 } 2105 error = (*linesw[tp->t_line].l_ioctl)(tp, ap->a_cmd, data, ap->a_fflag, ap->a_cred); 2106 if (error != ENOIOCTL) { 2107 lwkt_reltoken(&tty_token); 2108 return (error); 2109 } 2110 crit_enter(); 2111 error = ttioctl(tp, ap->a_cmd, data, ap->a_fflag); 2112 disc_optim(tp, &tp->t_termios, com); 2113 if (error != ENOIOCTL) { 2114 crit_exit(); 2115 lwkt_reltoken(&tty_token); 2116 return (error); 2117 } 2118 switch (ap->a_cmd) { 2119 case TIOCSBRK: 2120 sio_setreg(com, com_cfcr, com->cfcr_image |= CFCR_SBREAK); 2121 break; 2122 case TIOCCBRK: 2123 sio_setreg(com, com_cfcr, com->cfcr_image &= ~CFCR_SBREAK); 2124 break; 2125 case TIOCSDTR: 2126 (void)commctl(com, TIOCM_DTR, DMBIS); 2127 break; 2128 case TIOCCDTR: 2129 (void)commctl(com, TIOCM_DTR, DMBIC); 2130 break; 2131 /* 2132 * XXX should disallow changing MCR_RTS if CS_RTS_IFLOW is set. The 2133 * changes get undone on the next call to comparam(). 2134 */ 2135 case TIOCMSET: 2136 (void)commctl(com, *(int *)data, DMSET); 2137 break; 2138 case TIOCMBIS: 2139 (void)commctl(com, *(int *)data, DMBIS); 2140 break; 2141 case TIOCMBIC: 2142 (void)commctl(com, *(int *)data, DMBIC); 2143 break; 2144 case TIOCMGET: 2145 *(int *)data = commctl(com, 0, DMGET); 2146 break; 2147 case TIOCMSDTRWAIT: 2148 /* must be root since the wait applies to following logins */ 2149 error = priv_check_cred(ap->a_cred, PRIV_ROOT, 0); 2150 if (error != 0) { 2151 crit_exit(); 2152 lwkt_reltoken(&tty_token); 2153 return (error); 2154 } 2155 com->dtr_wait = *(int *)data * hz / 100; 2156 break; 2157 case TIOCMGDTRWAIT: 2158 *(int *)data = com->dtr_wait * 100 / hz; 2159 break; 2160 case TIOCTIMESTAMP: 2161 com->do_timestamp = TRUE; 2162 *(struct timeval *)data = com->timestamp; 2163 break; 2164 case TIOCDCDTIMESTAMP: 2165 com->do_dcd_timestamp = TRUE; 2166 *(struct timeval *)data = com->dcd_timestamp; 2167 break; 2168 default: 2169 crit_exit(); 2170 error = pps_ioctl(ap->a_cmd, data, &com->pps); 2171 if (error == ENODEV) 2172 error = ENOTTY; 2173 lwkt_reltoken(&tty_token); 2174 return (error); 2175 } 2176 crit_exit(); 2177 lwkt_reltoken(&tty_token); 2178 return (0); 2179 } 2180 2181 static void 2182 siopoll(void *dummy, void *frame) 2183 { 2184 int unit; 2185 2186 lwkt_gettoken(&tty_token); 2187 if (com_events == 0) { 2188 lwkt_reltoken(&tty_token); 2189 return; 2190 } 2191 2192 repeat: 2193 for (unit = 0; unit < sio_numunits; ++unit) { 2194 struct com_s *com; 2195 int incc; 2196 struct tty *tp; 2197 2198 com = com_addr(unit); 2199 if (com == NULL) 2200 continue; 2201 tp = com->tp; 2202 if (tp == NULL || com->gone) { 2203 /* 2204 * Discard any events related to never-opened or 2205 * going-away devices. 2206 */ 2207 com_lock(); 2208 incc = com->iptr - com->ibuf; 2209 com->iptr = com->ibuf; 2210 if (com->state & CS_CHECKMSR) { 2211 incc += LOTS_OF_EVENTS; 2212 com->state &= ~CS_CHECKMSR; 2213 } 2214 com_events -= incc; 2215 com_unlock(); 2216 continue; 2217 } 2218 if (com->iptr != com->ibuf) { 2219 com_lock(); 2220 sioinput(com); 2221 com_unlock(); 2222 } 2223 if (com->state & CS_CHECKMSR) { 2224 u_char delta_modem_status; 2225 2226 com_lock(); 2227 delta_modem_status = com->last_modem_status 2228 ^ com->prev_modem_status; 2229 com->prev_modem_status = com->last_modem_status; 2230 com_events -= LOTS_OF_EVENTS; 2231 com->state &= ~CS_CHECKMSR; 2232 com_unlock(); 2233 if (delta_modem_status & MSR_DCD) 2234 (*linesw[tp->t_line].l_modem) 2235 (tp, com->prev_modem_status & MSR_DCD); 2236 } 2237 if (com->state & CS_ODONE) { 2238 com_lock(); 2239 com_events -= LOTS_OF_EVENTS; 2240 com->state &= ~CS_ODONE; 2241 com_unlock(); 2242 if (!(com->state & CS_BUSY) 2243 && !(com->extra_state & CSE_BUSYCHECK)) { 2244 callout_reset(&com->busy_ch, hz / 100, 2245 siobusycheck, com); 2246 com->extra_state |= CSE_BUSYCHECK; 2247 } 2248 (*linesw[tp->t_line].l_start)(tp); 2249 } 2250 if (com_events == 0) 2251 break; 2252 } 2253 if (com_events >= LOTS_OF_EVENTS) 2254 goto repeat; 2255 lwkt_reltoken(&tty_token); 2256 } 2257 2258 /* 2259 * Called with tty_token held but no com_lock 2260 */ 2261 static int 2262 comparam(struct tty *tp, struct termios *t) 2263 { 2264 u_int cfcr; 2265 int cflag; 2266 struct com_s *com; 2267 u_int divisor; 2268 u_char dlbh; 2269 u_char dlbl; 2270 int unit; 2271 2272 unit = DEV_TO_UNIT(tp->t_dev); 2273 com = com_addr(unit); 2274 if (com == NULL) { 2275 return (ENODEV); 2276 } 2277 2278 /* do historical conversions */ 2279 if (t->c_ispeed == 0) 2280 t->c_ispeed = t->c_ospeed; 2281 2282 /* check requested parameters */ 2283 if (t->c_ospeed == 0) { 2284 divisor = 0; 2285 } else { 2286 if (t->c_ispeed != t->c_ospeed) 2287 return (EINVAL); 2288 divisor = siodivisor(com->rclk, t->c_ispeed); 2289 if (divisor == 0) 2290 return (EINVAL); 2291 } 2292 2293 /* parameters are OK, convert them to the com struct and the device */ 2294 crit_enter(); 2295 if (divisor == 0) 2296 (void)commctl(com, TIOCM_DTR, DMBIC); /* hang up line */ 2297 else 2298 (void)commctl(com, TIOCM_DTR, DMBIS); 2299 cflag = t->c_cflag; 2300 switch (cflag & CSIZE) { 2301 case CS5: 2302 cfcr = CFCR_5BITS; 2303 break; 2304 case CS6: 2305 cfcr = CFCR_6BITS; 2306 break; 2307 case CS7: 2308 cfcr = CFCR_7BITS; 2309 break; 2310 default: 2311 cfcr = CFCR_8BITS; 2312 break; 2313 } 2314 if (cflag & PARENB) { 2315 cfcr |= CFCR_PENAB; 2316 if (!(cflag & PARODD)) 2317 cfcr |= CFCR_PEVEN; 2318 } 2319 if (cflag & CSTOPB) 2320 cfcr |= CFCR_STOPB; 2321 2322 if (com->hasfifo && divisor != 0) { 2323 /* 2324 * Use a fifo trigger level low enough so that the input 2325 * latency from the fifo is less than about 16 msec and 2326 * the total latency is less than about 30 msec. These 2327 * latencies are reasonable for humans. Serial comms 2328 * protocols shouldn't expect anything better since modem 2329 * latencies are larger. 2330 * 2331 * Interrupts can be held up for long periods of time 2332 * due to inefficiencies in other parts of the kernel, 2333 * certain video cards, etc. Setting the FIFO trigger 2334 * point to MEDH instead of HIGH gives us 694uS of slop 2335 * (8 character times) instead of 173uS (2 character times) 2336 * @ 115200 bps. 2337 */ 2338 com->fifo_image = t->c_ospeed <= 4800 2339 ? FIFO_ENABLE : FIFO_ENABLE | FIFO_RX_MEDH; 2340 #ifdef COM_ESP 2341 /* 2342 * The Hayes ESP card needs the fifo DMA mode bit set 2343 * in compatibility mode. If not, it will interrupt 2344 * for each character received. 2345 */ 2346 if (com->esp) 2347 com->fifo_image |= FIFO_DMA_MODE; 2348 #endif 2349 sio_setreg(com, com_fifo, com->fifo_image); 2350 } 2351 2352 /* 2353 * This returns with interrupts disabled so that we can complete 2354 * the speed change atomically. Keeping interrupts disabled is 2355 * especially important while com_data is hidden. 2356 */ 2357 siocntxwait(com->bsh); 2358 (void) siosetwater(com, t->c_ispeed); 2359 2360 if (divisor != 0) { 2361 sio_setreg(com, com_cfcr, cfcr | CFCR_DLAB); 2362 /* 2363 * Only set the divisor registers if they would change, 2364 * since on some 16550 incompatibles (UMC8669F), setting 2365 * them while input is arriving them loses sync until 2366 * data stops arriving. 2367 */ 2368 dlbl = divisor & 0xFF; 2369 if (sio_getreg(com, com_dlbl) != dlbl) 2370 sio_setreg(com, com_dlbl, dlbl); 2371 dlbh = divisor >> 8; 2372 if (sio_getreg(com, com_dlbh) != dlbh) 2373 sio_setreg(com, com_dlbh, dlbh); 2374 } 2375 sio_setreg(com, com_cfcr, com->cfcr_image = cfcr); 2376 2377 if (!(tp->t_state & TS_TTSTOP)) 2378 com->state |= CS_TTGO; 2379 2380 if (cflag & CRTS_IFLOW) { 2381 if (com->st16650a) { 2382 sio_setreg(com, com_cfcr, 0xbf); 2383 sio_setreg(com, com_fifo, 2384 sio_getreg(com, com_fifo) | 0x40); 2385 } 2386 com->state |= CS_RTS_IFLOW; 2387 /* 2388 * If CS_RTS_IFLOW just changed from off to on, the change 2389 * needs to be propagated to MCR_RTS. This isn't urgent, 2390 * so do it later by calling comstart() instead of repeating 2391 * a lot of code from comstart() here. 2392 */ 2393 } else if (com->state & CS_RTS_IFLOW) { 2394 com->state &= ~CS_RTS_IFLOW; 2395 /* 2396 * CS_RTS_IFLOW just changed from on to off. Force MCR_RTS 2397 * on here, since comstart() won't do it later. 2398 */ 2399 outb(com->modem_ctl_port, com->mcr_image |= MCR_RTS); 2400 if (com->st16650a) { 2401 sio_setreg(com, com_cfcr, 0xbf); 2402 sio_setreg(com, com_fifo, 2403 sio_getreg(com, com_fifo) & ~0x40); 2404 } 2405 } 2406 2407 /* 2408 * Set up state to handle output flow control. 2409 * XXX - worth handling MDMBUF (DCD) flow control at the lowest level? 2410 * Now has 10+ msec latency, while CTS flow has 50- usec latency. 2411 */ 2412 com->state |= CS_ODEVREADY; 2413 com->state &= ~CS_CTS_OFLOW; 2414 if (cflag & CCTS_OFLOW) { 2415 com->state |= CS_CTS_OFLOW; 2416 if (!(com->last_modem_status & MSR_CTS)) 2417 com->state &= ~CS_ODEVREADY; 2418 if (com->st16650a) { 2419 sio_setreg(com, com_cfcr, 0xbf); 2420 sio_setreg(com, com_fifo, 2421 sio_getreg(com, com_fifo) | 0x80); 2422 } 2423 } else { 2424 if (com->st16650a) { 2425 sio_setreg(com, com_cfcr, 0xbf); 2426 sio_setreg(com, com_fifo, 2427 sio_getreg(com, com_fifo) & ~0x80); 2428 } 2429 } 2430 2431 sio_setreg(com, com_cfcr, com->cfcr_image); 2432 2433 /* XXX shouldn't call functions while intrs are disabled. */ 2434 disc_optim(tp, t, com); 2435 /* 2436 * Recover from fiddling with CS_TTGO. We used to call siointr1() 2437 * unconditionally, but that defeated the careful discarding of 2438 * stale input in sioopen(). 2439 */ 2440 if (com->state >= (CS_BUSY | CS_TTGO)) { 2441 com_lock(); 2442 siointr1(com); 2443 com_unlock(); 2444 } 2445 crit_exit(); 2446 comstart(tp); 2447 if (com->ibufold != NULL) { 2448 kfree(com->ibufold, M_DEVBUF); 2449 com->ibufold = NULL; 2450 } 2451 return (0); 2452 } 2453 2454 /* 2455 * called with tty_token held 2456 */ 2457 static int 2458 siosetwater(struct com_s *com, speed_t speed) 2459 { 2460 int cp4ticks; 2461 u_char *ibuf; 2462 int ibufsize; 2463 struct tty *tp; 2464 2465 /* 2466 * Make the buffer size large enough to handle a softtty interrupt 2467 * latency of about 2 ticks without loss of throughput or data 2468 * (about 3 ticks if input flow control is not used or not honoured, 2469 * but a bit less for CS5-CS7 modes). 2470 */ 2471 cp4ticks = speed / 10 / hz * 4; 2472 for (ibufsize = 128; ibufsize < cp4ticks;) 2473 ibufsize <<= 1; 2474 if (ibufsize == com->ibufsize) 2475 return (0); 2476 2477 /* 2478 * Allocate input buffer. The extra factor of 2 in the size is 2479 * to allow for an error byte for each input byte. 2480 */ 2481 ibuf = kmalloc(2 * ibufsize, M_DEVBUF, M_WAITOK | M_ZERO); 2482 2483 /* Initialize non-critical variables. */ 2484 com->ibufold = com->ibuf; 2485 com->ibufsize = ibufsize; 2486 tp = com->tp; 2487 if (tp != NULL) { 2488 tp->t_ififosize = 2 * ibufsize; 2489 tp->t_ispeedwat = (speed_t)-1; 2490 tp->t_ospeedwat = (speed_t)-1; 2491 } 2492 2493 /* 2494 * Read current input buffer. 2495 */ 2496 com_lock(); 2497 if (com->iptr != com->ibuf) 2498 sioinput(com); 2499 2500 /*- 2501 * Initialize critical variables, including input buffer watermarks. 2502 * The external device is asked to stop sending when the buffer 2503 * exactly reaches high water, or when the high level requests it. 2504 * The high level is notified immediately (rather than at a later 2505 * clock tick) when this watermark is reached. 2506 * The buffer size is chosen so the watermark should almost never 2507 * be reached. 2508 * The low watermark is invisibly 0 since the buffer is always 2509 * emptied all at once. 2510 */ 2511 com->iptr = com->ibuf = ibuf; 2512 com->ibufend = ibuf + ibufsize; 2513 com->ierroff = ibufsize; 2514 com->ihighwater = ibuf + 3 * ibufsize / 4; 2515 com_unlock(); 2516 return (0); 2517 } 2518 2519 static void 2520 comstart(struct tty *tp) 2521 { 2522 struct com_s *com; 2523 int unit; 2524 2525 lwkt_gettoken(&tty_token); 2526 unit = DEV_TO_UNIT(tp->t_dev); 2527 com = com_addr(unit); 2528 if (com == NULL) { 2529 lwkt_reltoken(&tty_token); 2530 return; 2531 } 2532 crit_enter(); 2533 com_lock(); 2534 if (tp->t_state & TS_TTSTOP) 2535 com->state &= ~CS_TTGO; 2536 else 2537 com->state |= CS_TTGO; 2538 if (tp->t_state & TS_TBLOCK) { 2539 if (com->mcr_image & MCR_RTS && com->state & CS_RTS_IFLOW) 2540 outb(com->modem_ctl_port, com->mcr_image &= ~MCR_RTS); 2541 } else { 2542 if (!(com->mcr_image & MCR_RTS) && com->iptr < com->ihighwater 2543 && com->state & CS_RTS_IFLOW) 2544 outb(com->modem_ctl_port, com->mcr_image |= MCR_RTS); 2545 } 2546 com_unlock(); 2547 if (tp->t_state & (TS_TIMEOUT | TS_TTSTOP)) { 2548 ttwwakeup(tp); 2549 crit_exit(); 2550 lwkt_reltoken(&tty_token); 2551 return; 2552 } 2553 if (tp->t_outq.c_cc != 0) { 2554 struct lbq *qp; 2555 struct lbq *next; 2556 2557 if (!com->obufs[0].l_queued) { 2558 com->obufs[0].l_tail 2559 = com->obuf1 + clist_qtob(&tp->t_outq, com->obuf1, 2560 sizeof com->obuf1); 2561 com->obufs[0].l_next = NULL; 2562 com->obufs[0].l_queued = TRUE; 2563 com_lock(); 2564 if (com->state & CS_BUSY) { 2565 qp = com->obufq.l_next; 2566 while ((next = qp->l_next) != NULL) 2567 qp = next; 2568 qp->l_next = &com->obufs[0]; 2569 } else { 2570 com->obufq.l_head = com->obufs[0].l_head; 2571 com->obufq.l_tail = com->obufs[0].l_tail; 2572 com->obufq.l_next = &com->obufs[0]; 2573 com->state |= CS_BUSY; 2574 } 2575 com_unlock(); 2576 } 2577 if (tp->t_outq.c_cc != 0 && !com->obufs[1].l_queued) { 2578 com->obufs[1].l_tail 2579 = com->obuf2 + clist_qtob(&tp->t_outq, com->obuf2, 2580 sizeof com->obuf2); 2581 com->obufs[1].l_next = NULL; 2582 com->obufs[1].l_queued = TRUE; 2583 com_lock(); 2584 if (com->state & CS_BUSY) { 2585 qp = com->obufq.l_next; 2586 while ((next = qp->l_next) != NULL) 2587 qp = next; 2588 qp->l_next = &com->obufs[1]; 2589 } else { 2590 com->obufq.l_head = com->obufs[1].l_head; 2591 com->obufq.l_tail = com->obufs[1].l_tail; 2592 com->obufq.l_next = &com->obufs[1]; 2593 com->state |= CS_BUSY; 2594 } 2595 com_unlock(); 2596 } 2597 tp->t_state |= TS_BUSY; 2598 } 2599 com_lock(); 2600 if (com->state >= (CS_BUSY | CS_TTGO)) 2601 siointr1(com); /* fake interrupt to start output */ 2602 com_unlock(); 2603 ttwwakeup(tp); 2604 crit_exit(); 2605 lwkt_reltoken(&tty_token); 2606 } 2607 2608 static void 2609 comstop(struct tty *tp, int rw) 2610 { 2611 struct com_s *com; 2612 2613 lwkt_gettoken(&tty_token); 2614 com = com_addr(DEV_TO_UNIT(tp->t_dev)); 2615 if (com == NULL || com->gone) { 2616 lwkt_reltoken(&tty_token); 2617 return; 2618 } 2619 com_lock(); 2620 if (rw & FWRITE) { 2621 if (com->hasfifo) 2622 #ifdef COM_ESP 2623 /* XXX avoid h/w bug. */ 2624 if (!com->esp) 2625 #endif 2626 sio_setreg(com, com_fifo, 2627 FIFO_XMT_RST | com->fifo_image); 2628 com->obufs[0].l_queued = FALSE; 2629 com->obufs[1].l_queued = FALSE; 2630 if (com->state & CS_ODONE) 2631 com_events -= LOTS_OF_EVENTS; 2632 com->state &= ~(CS_ODONE | CS_BUSY); 2633 com->tp->t_state &= ~TS_BUSY; 2634 } 2635 if (rw & FREAD) { 2636 if (com->hasfifo) 2637 #ifdef COM_ESP 2638 /* XXX avoid h/w bug. */ 2639 if (!com->esp) 2640 #endif 2641 sio_setreg(com, com_fifo, 2642 FIFO_RCV_RST | com->fifo_image); 2643 com_events -= (com->iptr - com->ibuf); 2644 com->iptr = com->ibuf; 2645 } 2646 com_unlock(); 2647 comstart(tp); 2648 lwkt_reltoken(&tty_token); 2649 } 2650 2651 static int 2652 commctl(struct com_s *com, int bits, int how) 2653 { 2654 int mcr; 2655 int msr; 2656 2657 lwkt_gettoken(&tty_token); 2658 if (how == DMGET) { 2659 bits = TIOCM_LE; /* XXX - always enabled while open */ 2660 mcr = com->mcr_image; 2661 if (mcr & MCR_DTR) 2662 bits |= TIOCM_DTR; 2663 if (mcr & MCR_RTS) 2664 bits |= TIOCM_RTS; 2665 msr = com->prev_modem_status; 2666 if (msr & MSR_CTS) 2667 bits |= TIOCM_CTS; 2668 if (msr & MSR_DCD) 2669 bits |= TIOCM_CD; 2670 if (msr & MSR_DSR) 2671 bits |= TIOCM_DSR; 2672 /* 2673 * XXX - MSR_RI is naturally volatile, and we make MSR_TERI 2674 * more volatile by reading the modem status a lot. Perhaps 2675 * we should latch both bits until the status is read here. 2676 */ 2677 if (msr & (MSR_RI | MSR_TERI)) 2678 bits |= TIOCM_RI; 2679 lwkt_reltoken(&tty_token); 2680 return (bits); 2681 } 2682 mcr = 0; 2683 if (bits & TIOCM_DTR) 2684 mcr |= MCR_DTR; 2685 if (bits & TIOCM_RTS) 2686 mcr |= MCR_RTS; 2687 if (com->gone) { 2688 lwkt_reltoken(&tty_token); 2689 return(0); 2690 } 2691 com_lock(); 2692 switch (how) { 2693 case DMSET: 2694 outb(com->modem_ctl_port, 2695 com->mcr_image = mcr | (com->mcr_image & MCR_IENABLE)); 2696 break; 2697 case DMBIS: 2698 outb(com->modem_ctl_port, com->mcr_image |= mcr); 2699 break; 2700 case DMBIC: 2701 outb(com->modem_ctl_port, com->mcr_image &= ~mcr); 2702 break; 2703 } 2704 com_unlock(); 2705 lwkt_reltoken(&tty_token); 2706 return (0); 2707 } 2708 2709 /* 2710 * NOTE: Must be called with tty_token held 2711 */ 2712 static void 2713 siosettimeout(void) 2714 { 2715 struct com_s *com; 2716 bool_t someopen; 2717 int unit; 2718 2719 ASSERT_LWKT_TOKEN_HELD(&tty_token); 2720 /* 2721 * Set our timeout period to 1 second if no polled devices are open. 2722 * Otherwise set it to max(1/200, 1/hz). 2723 * Enable timeouts iff some device is open. 2724 */ 2725 callout_stop(&sio_timeout_handle); 2726 sio_timeout = hz; 2727 someopen = FALSE; 2728 for (unit = 0; unit < sio_numunits; ++unit) { 2729 com = com_addr(unit); 2730 if (com != NULL && com->tp != NULL 2731 && com->tp->t_state & TS_ISOPEN && !com->gone) { 2732 someopen = TRUE; 2733 if (com->poll || com->poll_output) { 2734 sio_timeout = hz > 200 ? hz / 200 : 1; 2735 break; 2736 } 2737 } 2738 } 2739 if (someopen) { 2740 sio_timeouts_until_log = hz / sio_timeout; 2741 callout_reset(&sio_timeout_handle, sio_timeout, 2742 comwakeup, NULL); 2743 } else { 2744 /* Flush error messages, if any. */ 2745 sio_timeouts_until_log = 1; 2746 comwakeup(NULL); 2747 callout_stop(&sio_timeout_handle); 2748 } 2749 } 2750 2751 /* 2752 * NOTE: Must be called with tty_token held 2753 */ 2754 static void 2755 comwakeup(void *chan) 2756 { 2757 struct com_s *com; 2758 int unit; 2759 2760 /* 2761 * Can be called from a callout too so just get the token 2762 */ 2763 lwkt_gettoken(&tty_token); 2764 callout_reset(&sio_timeout_handle, sio_timeout, comwakeup, NULL); 2765 2766 /* 2767 * Recover from lost output interrupts. 2768 * Poll any lines that don't use interrupts. 2769 */ 2770 for (unit = 0; unit < sio_numunits; ++unit) { 2771 com = com_addr(unit); 2772 if (com != NULL && !com->gone 2773 && (com->state >= (CS_BUSY | CS_TTGO) || com->poll)) { 2774 com_lock(); 2775 siointr1(com); 2776 com_unlock(); 2777 } 2778 } 2779 2780 /* 2781 * Check for and log errors, but not too often. 2782 */ 2783 if (--sio_timeouts_until_log > 0) { 2784 lwkt_reltoken(&tty_token); 2785 return; 2786 } 2787 sio_timeouts_until_log = hz / sio_timeout; 2788 for (unit = 0; unit < sio_numunits; ++unit) { 2789 int errnum; 2790 2791 com = com_addr(unit); 2792 if (com == NULL) 2793 continue; 2794 if (com->gone) 2795 continue; 2796 for (errnum = 0; errnum < CE_NTYPES; ++errnum) { 2797 u_int delta; 2798 u_long total; 2799 2800 com_lock(); 2801 delta = com->delta_error_counts[errnum]; 2802 com->delta_error_counts[errnum] = 0; 2803 com_unlock(); 2804 if (delta == 0) 2805 continue; 2806 total = com->error_counts[errnum] += delta; 2807 log(LOG_ERR, "sio%d: %u more %s%s (total %lu)\n", 2808 unit, delta, error_desc[errnum], 2809 delta == 1 ? "" : "s", total); 2810 } 2811 } 2812 lwkt_reltoken(&tty_token); 2813 } 2814 2815 static void 2816 disc_optim(struct tty *tp, struct termios *t, struct com_s *com) 2817 { 2818 lwkt_gettoken(&tty_token); 2819 if (!(t->c_iflag & (ICRNL | IGNCR | IMAXBEL | INLCR | ISTRIP | IXON)) 2820 && (!(t->c_iflag & BRKINT) || (t->c_iflag & IGNBRK)) 2821 && (!(t->c_iflag & PARMRK) 2822 || (t->c_iflag & (IGNPAR | IGNBRK)) == (IGNPAR | IGNBRK)) 2823 && !(t->c_lflag & (ECHO | ICANON | IEXTEN | ISIG | PENDIN)) 2824 && linesw[tp->t_line].l_rint == ttyinput) 2825 tp->t_state |= TS_CAN_BYPASS_L_RINT; 2826 else 2827 tp->t_state &= ~TS_CAN_BYPASS_L_RINT; 2828 com->hotchar = linesw[tp->t_line].l_hotchar; 2829 lwkt_reltoken(&tty_token); 2830 } 2831 2832 /* 2833 * Following are all routines needed for SIO to act as console 2834 */ 2835 #include <sys/cons.h> 2836 2837 struct siocnstate { 2838 u_char dlbl; 2839 u_char dlbh; 2840 u_char ier; 2841 u_char cfcr; 2842 u_char mcr; 2843 }; 2844 2845 static speed_t siocngetspeed (Port_t, u_long rclk); 2846 #if 0 2847 static void siocnclose (struct siocnstate *sp, Port_t iobase); 2848 #endif 2849 static void siocnopen (struct siocnstate *sp, Port_t iobase, int speed); 2850 2851 static cn_probe_t siocnprobe; 2852 static cn_init_t siocninit; 2853 static cn_init_fini_t siocninit_fini; 2854 static cn_checkc_t siocncheckc; 2855 static cn_getc_t siocngetc; 2856 static cn_putc_t siocnputc; 2857 2858 #if defined(__i386__) || defined(__x86_64__) 2859 CONS_DRIVER(sio, siocnprobe, siocninit, siocninit_fini, 2860 NULL, siocngetc, siocncheckc, siocnputc, NULL, NULL); 2861 #endif 2862 2863 /* To get the GDB related variables */ 2864 #if defined(DDB) 2865 #include <ddb/ddb.h> 2866 #endif 2867 2868 static void 2869 siocntxwait(Port_t iobase) 2870 { 2871 int timo; 2872 2873 /* 2874 * Wait for any pending transmission to finish. Required to avoid 2875 * the UART lockup bug when the speed is changed, and for normal 2876 * transmits. 2877 */ 2878 timo = 100000; 2879 while ((inb(iobase + com_lsr) & (LSR_TSRE | LSR_TXRDY)) 2880 != (LSR_TSRE | LSR_TXRDY) && --timo != 0) 2881 ; 2882 } 2883 2884 /* 2885 * Read the serial port specified and try to figure out what speed 2886 * it's currently running at. We're assuming the serial port has 2887 * been initialized and is basicly idle. This routine is only intended 2888 * to be run at system startup. 2889 * 2890 * If the value read from the serial port doesn't make sense, return 0. 2891 */ 2892 /* 2893 * NOTE: Must be called with tty_token held 2894 */ 2895 static speed_t 2896 siocngetspeed(Port_t iobase, u_long rclk) 2897 { 2898 u_int divisor; 2899 u_char dlbh; 2900 u_char dlbl; 2901 u_char cfcr; 2902 2903 cfcr = inb(iobase + com_cfcr); 2904 outb(iobase + com_cfcr, CFCR_DLAB | cfcr); 2905 2906 dlbl = inb(iobase + com_dlbl); 2907 dlbh = inb(iobase + com_dlbh); 2908 2909 outb(iobase + com_cfcr, cfcr); 2910 2911 divisor = dlbh << 8 | dlbl; 2912 2913 /* XXX there should be more sanity checking. */ 2914 if (divisor == 0) 2915 return (CONSPEED); 2916 return (rclk / (16UL * divisor)); 2917 } 2918 2919 static void 2920 siocnopen(struct siocnstate *sp, Port_t iobase, int speed) 2921 { 2922 u_int divisor; 2923 u_char dlbh; 2924 u_char dlbl; 2925 2926 /* 2927 * Save all the device control registers except the fifo register 2928 * and set our default ones (cs8 -parenb speed=comdefaultrate). 2929 * We can't save the fifo register since it is read-only. 2930 */ 2931 sp->ier = inb(iobase + com_ier); 2932 outb(iobase + com_ier, 0); /* spltty() doesn't stop siointr() */ 2933 siocntxwait(iobase); 2934 sp->cfcr = inb(iobase + com_cfcr); 2935 outb(iobase + com_cfcr, CFCR_DLAB | CFCR_8BITS); 2936 sp->dlbl = inb(iobase + com_dlbl); 2937 sp->dlbh = inb(iobase + com_dlbh); 2938 /* 2939 * Only set the divisor registers if they would change, since on 2940 * some 16550 incompatibles (Startech), setting them clears the 2941 * data input register. This also reduces the effects of the 2942 * UMC8669F bug. 2943 */ 2944 divisor = siodivisor(comdefaultrclk, speed); 2945 dlbl = divisor & 0xFF; 2946 if (sp->dlbl != dlbl) 2947 outb(iobase + com_dlbl, dlbl); 2948 dlbh = divisor >> 8; 2949 if (sp->dlbh != dlbh) 2950 outb(iobase + com_dlbh, dlbh); 2951 outb(iobase + com_cfcr, CFCR_8BITS); 2952 sp->mcr = inb(iobase + com_mcr); 2953 /* 2954 * We don't want interrupts, but must be careful not to "disable" 2955 * them by clearing the MCR_IENABLE bit, since that might cause 2956 * an interrupt by floating the IRQ line. 2957 */ 2958 outb(iobase + com_mcr, (sp->mcr & MCR_IENABLE) | MCR_DTR | MCR_RTS); 2959 } 2960 2961 #if 0 2962 static void 2963 siocnclose(struct siocnstate *sp, Port_t iobase) 2964 { 2965 /* 2966 * Restore the device control registers. 2967 */ 2968 siocntxwait(iobase); 2969 outb(iobase + com_cfcr, CFCR_DLAB | CFCR_8BITS); 2970 if (sp->dlbl != inb(iobase + com_dlbl)) 2971 outb(iobase + com_dlbl, sp->dlbl); 2972 if (sp->dlbh != inb(iobase + com_dlbh)) 2973 outb(iobase + com_dlbh, sp->dlbh); 2974 outb(iobase + com_cfcr, sp->cfcr); 2975 /* 2976 * XXX damp oscillations of MCR_DTR and MCR_RTS by not restoring them. 2977 */ 2978 outb(iobase + com_mcr, sp->mcr | MCR_DTR | MCR_RTS); 2979 outb(iobase + com_ier, sp->ier); 2980 } 2981 #endif 2982 2983 static void 2984 siocnprobe(struct consdev *cp) 2985 { 2986 u_char cfcr; 2987 u_int divisor; 2988 int unit; 2989 struct siocnstate sp; 2990 2991 /* 2992 * Find our first enabled console, if any. If it is a high-level 2993 * console device, then initialize it and return successfully. 2994 * If it is a low-level console device, then initialize it and 2995 * return unsuccessfully. It must be initialized in both cases 2996 * for early use by console drivers and debuggers. Initializing 2997 * the hardware is not necessary in all cases, since the i/o 2998 * routines initialize it on the fly, but it is necessary if 2999 * input might arrive while the hardware is switched back to an 3000 * uninitialized state. We can't handle multiple console devices 3001 * yet because our low-level routines don't take a device arg. 3002 * We trust the user to set the console flags properly so that we 3003 * don't need to probe. 3004 */ 3005 cp->cn_pri = CN_DEAD; 3006 3007 for (unit = 0; unit < 16; unit++) { /* XXX need to know how many */ 3008 int flags; 3009 int disabled; 3010 3011 if (!resource_int_value("sio", unit, "disabled", &disabled)) { 3012 if (disabled) 3013 continue; 3014 } 3015 if (resource_int_value("sio", unit, "flags", &flags)) 3016 continue; 3017 if (COM_CONSOLE(flags) || COM_DEBUGGER(flags)) { 3018 int port; 3019 int baud; 3020 Port_t iobase; 3021 speed_t boot_speed; 3022 struct com_s *com; 3023 3024 /* 3025 * We need the port. For built-in serial ports 3026 * (e.g. sio0/sio1) the resources exist. For 3027 * add-on serial ports they resources might not 3028 * but the port may have been configured late 3029 * and we can find it when we re-probe. 3030 * 3031 * If the port is not specified check to see if 3032 * the device configured after the fact. 3033 */ 3034 com = com_addr(unit); 3035 if (resource_int_value("sio", unit, "port", &port)) { 3036 if (com == NULL || com->ioportres == NULL) 3037 continue; 3038 port = rman_get_bushandle(com->ioportres); 3039 } 3040 if (resource_int_value("sio", unit, "baud", &baud) == 0) 3041 boot_speed = baud; 3042 else 3043 boot_speed = 0; 3044 iobase = port; 3045 crit_enter(); 3046 if (boothowto & RB_SERIAL) { 3047 if (boot_speed == 0) { 3048 boot_speed = siocngetspeed(iobase, 3049 comdefaultrclk); 3050 } 3051 if (boot_speed) 3052 comdefaultrate = boot_speed; 3053 } 3054 if (boot_speed == 0) 3055 boot_speed = comdefaultrate; 3056 3057 /* 3058 * Initialize the divisor latch. We can't rely on 3059 * siocnopen() to do this the first time, since it 3060 * avoids writing to the latch if the latch appears 3061 * to have the correct value. Also, if we didn't 3062 * just read the speed from the hardware, then we 3063 * need to set the speed in hardware so that 3064 * switching it later is null. 3065 */ 3066 com_lock(); 3067 cfcr = inb(iobase + com_cfcr); 3068 outb(iobase + com_cfcr, CFCR_DLAB | cfcr); 3069 divisor = siodivisor(comdefaultrclk, boot_speed); 3070 outb(iobase + com_dlbl, divisor & 0xff); 3071 outb(iobase + com_dlbh, divisor >> 8); 3072 outb(iobase + com_cfcr, cfcr); 3073 3074 /* 3075 * We want ttyopen 3076 */ 3077 if (com) { 3078 com->it_in.c_iflag = TTYDEF_IFLAG; 3079 com->it_in.c_oflag = TTYDEF_OFLAG; 3080 com->it_in.c_cflag = TTYDEF_CFLAG | CLOCAL; 3081 com->it_in.c_lflag = TTYDEF_LFLAG; 3082 com->lt_out.c_cflag = com->lt_in.c_cflag = CLOCAL; 3083 com->lt_out.c_ispeed = com->lt_out.c_ospeed = 3084 com->lt_in.c_ispeed = com->lt_in.c_ospeed = 3085 com->it_in.c_ispeed = com->it_in.c_ospeed = 3086 boot_speed; 3087 } 3088 3089 siocnopen(&sp, iobase, boot_speed); 3090 com_unlock(); 3091 3092 crit_exit(); 3093 if (COM_CONSOLE(flags) && !COM_LLCONSOLE(flags)) { 3094 cp->cn_probegood = 1; 3095 cp->cn_private = (void *)(intptr_t)unit; 3096 cp->cn_pri = (COM_FORCECONSOLE(flags) 3097 || ((boothowto & RB_SERIAL)) ? 3098 CN_REMOTE : CN_NORMAL); 3099 siocniobase = iobase; 3100 siocnunit = unit; 3101 } 3102 if (COM_DEBUGGER(flags) && gdb_tab == NULL) { 3103 kprintf("sio%d: gdb debugging port\n", unit); 3104 siogdbiobase = iobase; 3105 siogdbunit = unit; 3106 #if defined(DDB) 3107 cp->cn_gdbprivate = (void *)(intptr_t)unit; 3108 gdb_tab = cp; 3109 #endif 3110 } 3111 } 3112 } 3113 #if defined(__i386__) || defined(__x86_64__) 3114 #if defined(DDB) 3115 /* 3116 * XXX Ugly Compatibility. 3117 * If no gdb port has been specified, set it to be the console 3118 * as some configuration files don't specify the gdb port. 3119 */ 3120 if (gdb_tab == NULL && (boothowto & RB_GDB)) { 3121 kprintf("Warning: no GDB port specified. Defaulting to sio%d.\n", 3122 siocnunit); 3123 kprintf("Set flag 0x80 on desired GDB port in your\n"); 3124 kprintf("configuration file (currently sio only).\n"); 3125 siogdbiobase = siocniobase; 3126 siogdbunit = siocnunit; 3127 cp->cn_gdbprivate = (void *)(intptr_t)siocnunit; 3128 gdb_tab = cp; 3129 } 3130 #endif 3131 #endif 3132 } 3133 3134 static void 3135 siocninit(struct consdev *cp) 3136 { 3137 comconsole = (int)(intptr_t)cp->cn_private; 3138 } 3139 3140 static void 3141 siocninit_fini(struct consdev *cp) 3142 { 3143 cdev_t dev; 3144 char tbuf[MAKEDEV_MINNBUF]; 3145 int unit; 3146 3147 if (cp->cn_probegood) { 3148 unit = (int)(intptr_t)cp->cn_private; 3149 3150 /* 3151 * Call devfs_find_device_by_name on ttydX to find the correct 3152 * device, as it should have been created already at this 3153 * point by the attach routine. 3154 * 3155 * If it isn't found, the serial port was not attached at all 3156 * and we shouldn't be here, so assert this case. 3157 */ 3158 dev = devfs_find_device_by_name("ttyd%s", 3159 makedev_unit_b32(tbuf, unit)); 3160 3161 KKASSERT(dev != NULL); 3162 cp->cn_dev = dev; 3163 } 3164 } 3165 3166 static int 3167 siocncheckc(void *private) 3168 { 3169 int c; 3170 int unit = (int)(intptr_t)private; 3171 Port_t iobase; 3172 #if 0 3173 struct siocnstate sp; 3174 #endif 3175 3176 if (unit == siogdbunit) 3177 iobase = siogdbiobase; 3178 else 3179 iobase = siocniobase; 3180 crit_enter(); 3181 com_lock(); 3182 #if 0 3183 siocnopen(&sp, iobase, comdefaultrate); 3184 #endif 3185 if (inb(iobase + com_lsr) & LSR_RXRDY) 3186 c = inb(iobase + com_data); 3187 else 3188 c = -1; 3189 #if 0 3190 siocnclose(&sp, iobase); 3191 #endif 3192 com_unlock(); 3193 crit_exit(); 3194 3195 return (c); 3196 } 3197 3198 3199 static int 3200 siocngetc(void *private) 3201 { 3202 int c; 3203 int unit = (int)(intptr_t)private; 3204 Port_t iobase; 3205 #if 0 3206 struct siocnstate sp; 3207 #endif 3208 3209 if (unit == siogdbunit) 3210 iobase = siogdbiobase; 3211 else 3212 iobase = siocniobase; 3213 crit_enter(); 3214 com_lock(); 3215 #if 0 3216 siocnopen(&sp, iobase, comdefaultrate); 3217 #endif 3218 while (!(inb(iobase + com_lsr) & LSR_RXRDY)) 3219 ; 3220 c = inb(iobase + com_data); 3221 #if 0 3222 siocnclose(&sp, iobase); 3223 #endif 3224 com_unlock(); 3225 crit_exit(); 3226 return (c); 3227 } 3228 3229 static void 3230 siocnputc(void *private, int c) 3231 { 3232 int unit = (int)(intptr_t)private; 3233 #if 0 3234 struct siocnstate sp; 3235 #endif 3236 Port_t iobase; 3237 3238 if (unit == siogdbunit) 3239 iobase = siogdbiobase; 3240 else 3241 iobase = siocniobase; 3242 crit_enter(); 3243 com_lock(); 3244 #if 0 3245 siocnopen(&sp, iobase, comdefaultrate); 3246 #endif 3247 siocntxwait(iobase); 3248 outb(iobase + com_data, c); 3249 #if 0 3250 siocnclose(&sp, iobase); 3251 #endif 3252 com_unlock(); 3253 crit_exit(); 3254 } 3255 3256 DRIVER_MODULE(sio, isa, sio_isa_driver, sio_devclass, NULL, NULL); 3257 DRIVER_MODULE(sio, acpi, sio_isa_driver, sio_devclass, NULL, NULL); 3258 #if NPCI > 0 3259 DRIVER_MODULE(sio, pci, sio_pci_driver, sio_devclass, NULL, NULL); 3260 #endif 3261 #if NPUC > 0 3262 DRIVER_MODULE(sio, puc, sio_puc_driver, sio_devclass, NULL, NULL); 3263 #endif 3264