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/caps.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 Port_t siocniobase; 261 static int siocnunit; 262 static Port_t siogdbiobase; 263 static int siogdbunit = -1; 264 static bool_t sio_registered; 265 static int sio_timeout; 266 static int sio_timeouts_until_log; 267 static struct callout sio_timeout_handle; 268 static int sio_numunits; 269 270 #ifdef COM_ESP 271 /* XXX configure this properly. */ 272 static Port_t likely_com_ports[] = { 0x3f8, 0x2f8, 0x3e8, 0x2e8, }; 273 static Port_t likely_esp_ports[] = { 0x140, 0x180, 0x280, 0 }; 274 #endif 275 276 /* 277 * handle sysctl read/write requests for console speed 278 * 279 * In addition to setting comdefaultrate for I/O through /dev/console, 280 * also set the initial and lock values for the /dev/ttyXX device 281 * if there is one associated with the console. Finally, if the /dev/tty 282 * device has already been open, change the speed on the open running port 283 * itself. 284 */ 285 286 static int 287 sysctl_machdep_comdefaultrate(SYSCTL_HANDLER_ARGS) 288 { 289 int error; 290 speed_t newspeed; 291 struct com_s *com; 292 struct tty *tp; 293 294 lwkt_gettoken(&tty_token); 295 newspeed = comdefaultrate; 296 297 error = sysctl_handle_opaque(oidp, &newspeed, sizeof newspeed, req); 298 if (error || !req->newptr) { 299 lwkt_reltoken(&tty_token); 300 return (error); 301 } 302 303 comdefaultrate = newspeed; 304 305 if (comconsole < 0) { /* serial console not selected? */ 306 lwkt_reltoken(&tty_token); 307 return (0); 308 } 309 310 com = com_addr(comconsole); 311 if (com == NULL) { 312 lwkt_reltoken(&tty_token); 313 return (ENXIO); 314 } 315 316 /* 317 * set the initial and lock rates for /dev/ttydXX and /dev/cuaXX 318 * (note, the lock rates really are boolean -- if non-zero, disallow 319 * speed changes) 320 */ 321 com->it_in.c_ispeed = com->it_in.c_ospeed = 322 com->lt_in.c_ispeed = com->lt_in.c_ospeed = 323 com->it_out.c_ispeed = com->it_out.c_ospeed = 324 com->lt_out.c_ispeed = com->lt_out.c_ospeed = comdefaultrate; 325 326 /* 327 * if we're open, change the running rate too 328 */ 329 tp = com->tp; 330 if (tp && (tp->t_state & TS_ISOPEN)) { 331 tp->t_termios.c_ispeed = 332 tp->t_termios.c_ospeed = comdefaultrate; 333 crit_enter(); 334 error = comparam(tp, &tp->t_termios); 335 crit_exit(); 336 } 337 lwkt_reltoken(&tty_token); 338 return error; 339 } 340 341 SYSCTL_PROC(_machdep, OID_AUTO, conspeed, CTLTYPE_INT | CTLFLAG_RW, 342 0, 0, sysctl_machdep_comdefaultrate, "I", ""); 343 344 #if NPCI > 0 345 struct pci_ids { 346 u_int32_t type; 347 const char *desc; 348 int rid; 349 }; 350 351 static struct pci_ids pci_ids[] = { 352 { 0x100812b9, "3COM PCI FaxModem", 0x10 }, 353 { 0x2000131f, "CyberSerial (1-port) 16550", 0x10 }, 354 { 0x01101407, "Koutech IOFLEX-2S PCI Dual Port Serial", 0x10 }, 355 { 0x01111407, "Koutech IOFLEX-2S PCI Dual Port Serial", 0x10 }, 356 { 0x048011c1, "Lucent kermit based PCI Modem", 0x14 }, 357 { 0x95211415, "Oxford Semiconductor PCI Dual Port Serial", 0x10 }, 358 { 0x7101135e, "SeaLevel Ultra 530.PCI Single Port Serial", 0x18 }, 359 { 0x0000151f, "SmartLink 5634PCV SurfRider", 0x10 }, 360 { 0x98459710, "Netmos Nm9845 PCI Bridge with Dual UART", 0x10 }, 361 { 0x99229710, "MCS9922 PCIe Multi-I/O Controller", 0x10 }, 362 { 0x8c3d8086, "Intel Lynx Point KT Controller", 0x10 }, 363 { 0x9c3d8086, "Intel Lynx Point-LP HECI KT", 0x10 }, 364 { 0x8cbd8086, "Intel Wildcat Point KT Controller", 0x10 }, 365 { 0x9cbd8086, "Intel Wildcat Point-LP KT Controller", 0x10 }, 366 { 0x00000000, NULL, 0 } 367 }; 368 369 static int 370 sio_pci_attach(device_t dev) 371 { 372 u_int32_t type; 373 struct pci_ids *id; 374 375 type = pci_get_devid(dev); 376 id = pci_ids; 377 while (id->type && id->type != type) 378 id++; 379 if (id->desc == NULL) 380 return (ENXIO); 381 sio_pci_kludge_unit(dev); 382 return (sioattach(dev, id->rid, 0UL)); 383 } 384 385 /* 386 * Don't cut and paste this to other drivers. It is a horrible kludge 387 * which will fail to work and also be unnecessary in future versions. 388 */ 389 static void 390 sio_pci_kludge_unit(device_t dev) 391 { 392 devclass_t dc; 393 int err; 394 int start; 395 int unit; 396 397 unit = 0; 398 start = 0; 399 while (resource_int_value("sio", unit, "port", &start) == 0 && 400 start > 0) 401 unit++; 402 if (device_get_unit(dev) < unit) { 403 dc = device_get_devclass(dev); 404 while (devclass_get_device(dc, unit)) 405 unit++; 406 device_printf(dev, "moving to sio%d\n", unit); 407 err = device_set_unit(dev, unit); /* EVIL DO NOT COPY */ 408 if (err) 409 device_printf(dev, "error moving device %d\n", err); 410 } 411 } 412 413 static int 414 sio_pci_probe(device_t dev) 415 { 416 u_int32_t type; 417 struct pci_ids *id; 418 419 type = pci_get_devid(dev); 420 id = pci_ids; 421 while (id->type && id->type != type) 422 id++; 423 if (id->desc == NULL) 424 return (ENXIO); 425 device_set_desc(dev, id->desc); 426 return (sioprobe(dev, id->rid, 0UL)); 427 } 428 #endif /* NPCI > 0 */ 429 430 #if NPUC > 0 431 static int 432 sio_puc_attach(device_t dev) 433 { 434 uintptr_t rclk; 435 436 if (BUS_READ_IVAR(device_get_parent(dev), dev, PUC_IVAR_FREQ, 437 &rclk) != 0) 438 rclk = DEFAULT_RCLK; 439 return (sioattach(dev, 0, rclk)); 440 } 441 442 static int 443 sio_puc_probe(device_t dev) 444 { 445 uintptr_t rclk; 446 447 if (BUS_READ_IVAR(device_get_parent(dev), dev, PUC_IVAR_FREQ, 448 &rclk) != 0) 449 rclk = DEFAULT_RCLK; 450 return (sioprobe(dev, 0, rclk)); 451 } 452 #endif /* NPUC */ 453 454 static struct isa_pnp_id sio_ids[] = { 455 {0x0005d041, "Standard PC COM port"}, /* PNP0500 */ 456 {0x0105d041, "16550A-compatible COM port"}, /* PNP0501 */ 457 {0x0205d041, "Multiport serial device (non-intelligent 16550)"}, /* PNP0502 */ 458 {0x1005d041, "Generic IRDA-compatible device"}, /* PNP0510 */ 459 {0x1105d041, "Generic IRDA-compatible device"}, /* PNP0511 */ 460 /* Devices that do not have a compatid */ 461 {0x12206804, NULL}, /* ACH2012 - 5634BTS 56K Video Ready Modem */ 462 {0x7602a904, NULL}, /* AEI0276 - 56K v.90 Fax Modem (LKT) */ 463 {0x00007905, NULL}, /* AKY0000 - 56K Plug&Play Modem */ 464 {0x21107905, NULL}, /* AKY1021 - 56K Plug&Play Modem */ 465 {0x01405407, NULL}, /* AZT4001 - AZT3000 PnP SOUND DEVICE, MODEM */ 466 {0x56039008, NULL}, /* BDP0356 - Best Data 56x2 */ 467 {0x56159008, NULL}, /* BDP1556 - B.D. Smart One 56SPS,Voice Modem*/ 468 {0x36339008, NULL}, /* BDP3336 - Best Data Prods. 336F */ 469 {0x0014490a, NULL}, /* BRI1400 - Boca 33.6 PnP */ 470 {0x0015490a, NULL}, /* BRI1500 - Internal Fax Data */ 471 {0x0034490a, NULL}, /* BRI3400 - Internal ACF Modem */ 472 {0x0094490a, NULL}, /* BRI9400 - Boca K56Flex PnP */ 473 {0x00b4490a, NULL}, /* BRIB400 - Boca 56k PnP */ 474 {0x0030320d, NULL}, /* CIR3000 - Cirrus Logic V43 */ 475 {0x0100440e, NULL}, /* CRD0001 - Cardinal MVP288IV ? */ 476 {0x01308c0e, NULL}, /* CTL3001 - Creative Labs Phoneblaster */ 477 {0x36033610, NULL}, /* DAV0336 - DAVICOM 336PNP MODEM */ 478 {0x01009416, NULL}, /* ETT0001 - E-Tech Bullet 33k6 PnP */ 479 {0x0000aa1a, NULL}, /* FUJ0000 - FUJITSU Modem 33600 PNP/I2 */ 480 {0x1200c31e, NULL}, /* GVC0012 - VF1128HV-R9 (win modem?) */ 481 {0x0303c31e, NULL}, /* GVC0303 - MaxTech 33.6 PnP D/F/V */ 482 {0x0505c31e, NULL}, /* GVC0505 - GVC 56k Faxmodem */ 483 {0x0116c31e, NULL}, /* GVC1601 - Rockwell V.34 Plug & Play Modem */ 484 {0x0050c31e, NULL}, /* GVC5000 - some GVC modem */ 485 {0x3800f91e, NULL}, /* GWY0038 - Telepath with v.90 */ 486 {0x9062f91e, NULL}, /* GWY6290 - Telepath with x2 Technology */ 487 {0x8100e425, NULL}, /* IOD0081 - I-O DATA DEVICE,INC. IFML-560 */ 488 {0x21002534, NULL}, /* MAE0021 - Jetstream Int V.90 56k Voice Series 2*/ 489 {0x0000f435, NULL}, /* MOT0000 - Motorola ModemSURFR 33.6 Intern */ 490 {0x5015f435, NULL}, /* MOT1550 - Motorola ModemSURFR 56K Modem */ 491 {0xf015f435, NULL}, /* MOT15F0 - Motorola VoiceSURFR 56K Modem */ 492 {0x6045f435, NULL}, /* MOT4560 - Motorola ? */ 493 {0x61e7a338, NULL}, /* NECE761 - 33.6Modem */ 494 {0x08804f3f, NULL}, /* OZO8008 - Zoom (33.6k Modem) */ 495 {0x0f804f3f, NULL}, /* OZO800f - Zoom 2812 (56k Modem) */ 496 {0x39804f3f, NULL}, /* OZO8039 - Zoom 56k flex */ 497 {0x00914f3f, NULL}, /* OZO9100 - Zoom 2919 (K56 Faxmodem) */ 498 {0x3024a341, NULL}, /* PMC2430 - Pace 56 Voice Internal Modem */ 499 {0x1000eb49, NULL}, /* ROK0010 - Rockwell ? */ 500 {0x1200b23d, NULL}, /* RSS0012 - OMRON ME5614ISA */ 501 {0x5002734a, NULL}, /* RSS0250 - 5614Jx3(G) Internal Modem */ 502 {0x6202734a, NULL}, /* RSS0262 - 5614Jx3[G] V90+K56Flex Modem */ 503 {0x1010104d, NULL}, /* SHP1010 - Rockwell 33600bps Modem */ 504 {0xc100ad4d, NULL}, /* SMM00C1 - Leopard 56k PnP */ 505 {0x9012b04e, NULL}, /* SUP1290 - Supra ? */ 506 {0x1013b04e, NULL}, /* SUP1310 - SupraExpress 336i PnP */ 507 {0x8013b04e, NULL}, /* SUP1380 - SupraExpress 288i PnP Voice */ 508 {0x8113b04e, NULL}, /* SUP1381 - SupraExpress 336i PnP Voice */ 509 {0x5016b04e, NULL}, /* SUP1650 - Supra 336i Sp Intl */ 510 {0x7016b04e, NULL}, /* SUP1670 - Supra 336i V+ Intl */ 511 {0x7420b04e, NULL}, /* SUP2070 - Supra ? */ 512 {0x8020b04e, NULL}, /* SUP2080 - Supra ? */ 513 {0x8420b04e, NULL}, /* SUP2084 - SupraExpress 56i PnP */ 514 {0x7121b04e, NULL}, /* SUP2171 - SupraExpress 56i Sp? */ 515 {0x8024b04e, NULL}, /* SUP2480 - Supra ? */ 516 {0x01007256, NULL}, /* USR0001 - U.S. Robotics Inc., Sportster W */ 517 {0x02007256, NULL}, /* USR0002 - U.S. Robotics Inc. Sportster 33. */ 518 {0x04007256, NULL}, /* USR0004 - USR Sportster 14.4k */ 519 {0x06007256, NULL}, /* USR0006 - USR Sportster 33.6k */ 520 {0x11007256, NULL}, /* USR0011 - USR ? */ 521 {0x01017256, NULL}, /* USR0101 - USR ? */ 522 {0x30207256, NULL}, /* USR2030 - U.S.Robotics Inc. Sportster 560 */ 523 {0x50207256, NULL}, /* USR2050 - U.S.Robotics Inc. Sportster 33. */ 524 {0x70207256, NULL}, /* USR2070 - U.S.Robotics Inc. Sportster 560 */ 525 {0x30307256, NULL}, /* USR3030 - U.S. Robotics 56K FAX INT */ 526 {0x31307256, NULL}, /* USR3031 - U.S. Robotics 56K FAX INT */ 527 {0x50307256, NULL}, /* USR3050 - U.S. Robotics 56K FAX INT */ 528 {0x70307256, NULL}, /* USR3070 - U.S. Robotics 56K Voice INT */ 529 {0x90307256, NULL}, /* USR3090 - USR ? */ 530 {0x70917256, NULL}, /* USR9170 - U.S. Robotics 56K FAX INT */ 531 {0x90917256, NULL}, /* USR9190 - USR 56k Voice INT */ 532 {0x0300695c, NULL}, /* WCI0003 - Fax/Voice/Modem/Speakphone/Asvd */ 533 {0x01a0896a, NULL}, /* ZTIA001 - Zoom Internal V90 Faxmodem */ 534 {0x61f7896a, NULL}, /* ZTIF761 - Zoom ComStar 33.6 */ 535 {0} 536 }; 537 538 539 540 static int 541 sio_isa_probe(device_t dev) 542 { 543 /* Check isapnp ids */ 544 if (ISA_PNP_PROBE(device_get_parent(dev), dev, sio_ids) == ENXIO) 545 return (ENXIO); 546 return (sioprobe(dev, 0, 0UL)); 547 } 548 549 int 550 sioprobe(device_t dev, int xrid, u_long rclk) 551 { 552 #if 0 553 static bool_t already_init; 554 device_t xdev; 555 #endif 556 struct com_s *com; 557 u_int divisor; 558 bool_t failures[10]; 559 int fn; 560 device_t idev; 561 Port_t iobase; 562 intrmask_t irqmap[4]; 563 intrmask_t irqs; 564 u_char mcr_image; 565 int result; 566 u_long xirq; 567 u_int flags = device_get_flags(dev); 568 int rid; 569 struct resource *port; 570 571 rid = xrid; 572 port = bus_alloc_resource(dev, SYS_RES_IOPORT, &rid, 573 0, ~0, IO_COMSIZE, RF_ACTIVE); 574 if (!port) 575 return (ENXIO); 576 577 lwkt_gettoken(&tty_token); 578 com = device_get_softc(dev); 579 com->bst = rman_get_bustag(port); 580 com->bsh = rman_get_bushandle(port); 581 if (rclk == 0) 582 rclk = DEFAULT_RCLK; 583 com->rclk = rclk; 584 585 #if 0 586 /* 587 * XXX this is broken - when we are first called, there are no 588 * previously configured IO ports. We could hard code 589 * 0x3f8, 0x2f8, 0x3e8, 0x2e8 etc but that's probably worse. 590 * This code has been doing nothing since the conversion since 591 * "count" is zero the first time around. 592 */ 593 if (!already_init) { 594 /* 595 * Turn off MCR_IENABLE for all likely serial ports. An unused 596 * port with its MCR_IENABLE gate open will inhibit interrupts 597 * from any used port that shares the interrupt vector. 598 * XXX the gate enable is elsewhere for some multiports. 599 */ 600 device_t *devs; 601 int count, i, xioport; 602 603 devclass_get_devices(sio_devclass, &devs, &count); 604 for (i = 0; i < count; i++) { 605 xdev = devs[i]; 606 if (device_is_enabled(xdev) && 607 bus_get_resource(xdev, SYS_RES_IOPORT, 0, &xioport, 608 NULL) == 0) 609 outb(xioport + com_mcr, 0); 610 } 611 kfree(devs, M_TEMP); 612 already_init = TRUE; 613 } 614 #endif 615 616 if (COM_LLCONSOLE(flags)) { 617 kprintf("sio%d: reserved for low-level i/o\n", 618 device_get_unit(dev)); 619 bus_release_resource(dev, SYS_RES_IOPORT, rid, port); 620 lwkt_reltoken(&tty_token); 621 return (ENXIO); 622 } 623 624 /* 625 * If the device is on a multiport card and has an AST/4 626 * compatible interrupt control register, initialize this 627 * register and prepare to leave MCR_IENABLE clear in the mcr. 628 * Otherwise, prepare to set MCR_IENABLE in the mcr. 629 * Point idev to the device struct giving the correct id_irq. 630 * This is the struct for the master device if there is one. 631 */ 632 idev = dev; 633 mcr_image = MCR_IENABLE; 634 #ifdef COM_MULTIPORT 635 if (COM_ISMULTIPORT(flags)) { 636 Port_t xiobase; 637 u_long io; 638 639 idev = devclass_get_device(sio_devclass, COM_MPMASTER(flags)); 640 if (idev == NULL) { 641 kprintf("sio%d: master device %d not configured\n", 642 device_get_unit(dev), COM_MPMASTER(flags)); 643 idev = dev; 644 } 645 if (!COM_NOTAST4(flags)) { 646 if (bus_get_resource(idev, SYS_RES_IOPORT, 0, &io, 647 NULL) == 0) { 648 xiobase = io; 649 if (bus_get_resource(idev, SYS_RES_IRQ, 0, 650 NULL, NULL) == 0) 651 outb(xiobase + com_scr, 0x80); 652 else 653 outb(xiobase + com_scr, 0); 654 } 655 mcr_image = 0; 656 } 657 } 658 #endif /* COM_MULTIPORT */ 659 if (bus_get_resource(idev, SYS_RES_IRQ, 0, NULL, NULL) != 0) 660 mcr_image = 0; 661 662 bzero(failures, sizeof failures); 663 iobase = rman_get_start(port); 664 665 /* 666 * We don't want to get actual interrupts, just masked ones. 667 * Interrupts from this line should already be masked in the ICU, 668 * but mask them in the processor as well in case there are some 669 * (misconfigured) shared interrupts. 670 */ 671 com_lock(); 672 /* EXTRA DELAY? */ 673 674 /* 675 * For the TI16754 chips, set prescaler to 1 (4 is often the 676 * default after-reset value) as otherwise it's impossible to 677 * get highest baudrates. 678 */ 679 if (COM_TI16754(flags)) { 680 u_char cfcr, efr; 681 682 cfcr = sio_getreg(com, com_cfcr); 683 sio_setreg(com, com_cfcr, CFCR_EFR_ENABLE); 684 efr = sio_getreg(com, com_efr); 685 /* Unlock extended features to turn off prescaler. */ 686 sio_setreg(com, com_efr, efr | EFR_EFE); 687 /* Disable EFR. */ 688 sio_setreg(com, com_cfcr, (cfcr != CFCR_EFR_ENABLE) ? cfcr : 0); 689 /* Turn off prescaler. */ 690 sio_setreg(com, com_mcr, 691 sio_getreg(com, com_mcr) & ~MCR_PRESCALE); 692 sio_setreg(com, com_cfcr, CFCR_EFR_ENABLE); 693 sio_setreg(com, com_efr, efr); 694 sio_setreg(com, com_cfcr, cfcr); 695 } 696 697 /* 698 * Initialize the speed and the word size and wait long enough to 699 * drain the maximum of 16 bytes of junk in device output queues. 700 * The speed is undefined after a master reset and must be set 701 * before relying on anything related to output. There may be 702 * junk after a (very fast) soft reboot and (apparently) after 703 * master reset. 704 * XXX what about the UART bug avoided by waiting in comparam()? 705 * We don't want to to wait long enough to drain at 2 bps. 706 */ 707 if (iobase == siocniobase) { 708 DELAY((16 + 1) * 1000000 / (comdefaultrate / 10)); 709 } else { 710 sio_setreg(com, com_cfcr, CFCR_DLAB | CFCR_8BITS); 711 divisor = siodivisor(rclk, SIO_TEST_SPEED); 712 sio_setreg(com, com_dlbl, divisor & 0xff); 713 sio_setreg(com, com_dlbh, divisor >> 8); 714 sio_setreg(com, com_cfcr, CFCR_8BITS); 715 DELAY((16 + 1) * 1000000 / (SIO_TEST_SPEED / 10)); 716 } 717 718 /* 719 * Make sure we can drain the receiver. If we can't, the serial 720 * port may not exist. 721 */ 722 for (fn = 0; fn < 256; ++fn) { 723 if ((sio_getreg(com, com_lsr) & LSR_RXRDY) == 0) 724 break; 725 (void)sio_getreg(com, com_data); 726 } 727 if (fn == 256) { 728 /* 729 * Serial port might be probed but not exist, disable 730 * if so. Clear console flags if the serial port does 731 * not exist. This is very common for sio0 and sio1 732 * now and avoids unnecessary user confusion (user does 733 * not have to clear the sio0 console flag if sio0 does 734 * not exist and the user wants the console on another 735 * sio). 736 * 737 * Also set the sioN.disabled resource to prevent console 738 * probing of the non-existent serial port. sio0.flags 739 * typically defaults to 0x10 (from the kernel config). 740 */ 741 com_unlock(); 742 lwkt_reltoken(&tty_token); 743 kprintf("sio%d: can't drain, serial port might " 744 "not exist, disabling\n", device_get_unit(dev)); 745 com->flags &= ~0x30; 746 resource_set_int("sio", device_get_unit(dev), "disabled", 1); 747 748 return (ENXIO); 749 } 750 751 /* 752 * Enable the interrupt gate and disable device interupts. This 753 * should leave the device driving the interrupt line low and 754 * guarantee an edge trigger if an interrupt can be generated. 755 */ 756 /* EXTRA DELAY? */ 757 sio_setreg(com, com_mcr, mcr_image); 758 sio_setreg(com, com_ier, 0); 759 DELAY(1000); /* XXX */ 760 irqmap[0] = isa_irq_pending(); 761 762 /* 763 * Attempt to set loopback mode so that we can send a null byte 764 * without annoying any external device. 765 */ 766 /* EXTRA DELAY? */ 767 sio_setreg(com, com_mcr, mcr_image | MCR_LOOPBACK); 768 769 /* 770 * Attempt to generate an output interrupt. On 8250's, setting 771 * IER_ETXRDY generates an interrupt independent of the current 772 * setting and independent of whether the THR is empty. On 16450's, 773 * setting IER_ETXRDY generates an interrupt independent of the 774 * current setting. On 16550A's, setting IER_ETXRDY only 775 * generates an interrupt when IER_ETXRDY is not already set. 776 */ 777 sio_setreg(com, com_ier, IER_ETXRDY); 778 779 /* 780 * On some 16x50 incompatibles, setting IER_ETXRDY doesn't generate 781 * an interrupt. They'd better generate one for actually doing 782 * output. Loopback may be broken on the same incompatibles but 783 * it's unlikely to do more than allow the null byte out. 784 */ 785 sio_setreg(com, com_data, 0); 786 DELAY((1 + 2) * 1000000 / (SIO_TEST_SPEED / 10)); 787 788 /* 789 * Turn off loopback mode so that the interrupt gate works again 790 * (MCR_IENABLE was hidden). This should leave the device driving 791 * an interrupt line high. It doesn't matter if the interrupt 792 * line oscillates while we are not looking at it, since interrupts 793 * are disabled. 794 */ 795 /* EXTRA DELAY? */ 796 sio_setreg(com, com_mcr, mcr_image); 797 798 /* 799 * Some pcmcia cards have the "TXRDY bug", so we check everyone 800 * for IIR_TXRDY implementation ( Palido 321s, DC-1S... ) 801 */ 802 if (COM_NOPROBE(flags)) { 803 /* Reading IIR register twice */ 804 for (fn = 0; fn < 2; fn ++) { 805 DELAY(10000); 806 failures[6] = sio_getreg(com, com_iir); 807 } 808 /* Check IIR_TXRDY clear ? */ 809 result = 0; 810 if (failures[6] & IIR_TXRDY) { 811 /* Nop, Double check with clearing IER */ 812 sio_setreg(com, com_ier, 0); 813 if (sio_getreg(com, com_iir) & IIR_NOPEND) { 814 /* Ok. we're familia this gang */ 815 SET_FLAG(dev, COM_C_IIR_TXRDYBUG); 816 } else { 817 /* Unknown, Just omit this chip.. XXX */ 818 result = ENXIO; 819 sio_setreg(com, com_mcr, 0); 820 } 821 } else { 822 /* OK. this is well-known guys */ 823 CLR_FLAG(dev, COM_C_IIR_TXRDYBUG); 824 } 825 sio_setreg(com, com_ier, 0); 826 sio_setreg(com, com_cfcr, CFCR_8BITS); 827 com_unlock(); 828 bus_release_resource(dev, SYS_RES_IOPORT, rid, port); 829 lwkt_reltoken(&tty_token); 830 return (iobase == siocniobase ? 0 : result); 831 } 832 833 /* 834 * Check that 835 * o the CFCR, IER and MCR in UART hold the values written to them 836 * (the values happen to be all distinct - this is good for 837 * avoiding false positive tests from bus echoes). 838 * o an output interrupt is generated and its vector is correct. 839 * o the interrupt goes away when the IIR in the UART is read. 840 */ 841 /* EXTRA DELAY? */ 842 failures[0] = sio_getreg(com, com_cfcr) - CFCR_8BITS; 843 failures[1] = sio_getreg(com, com_ier) - IER_ETXRDY; 844 failures[2] = sio_getreg(com, com_mcr) - mcr_image; 845 DELAY(10000); /* Some internal modems need this time */ 846 irqmap[1] = isa_irq_pending(); 847 failures[4] = (sio_getreg(com, com_iir) & IIR_IMASK) - IIR_TXRDY; 848 DELAY(1000); /* XXX */ 849 irqmap[2] = isa_irq_pending(); 850 failures[6] = (sio_getreg(com, com_iir) & IIR_IMASK) - IIR_NOPEND; 851 852 /* 853 * Turn off all device interrupts and check that they go off properly. 854 * Leave MCR_IENABLE alone. For ports without a master port, it gates 855 * the OUT2 output of the UART to 856 * the ICU input. Closing the gate would give a floating ICU input 857 * (unless there is another device driving it) and spurious interrupts. 858 * (On the system that this was first tested on, the input floats high 859 * and gives a (masked) interrupt as soon as the gate is closed.) 860 */ 861 sio_setreg(com, com_ier, 0); 862 sio_setreg(com, com_cfcr, CFCR_8BITS); /* dummy to avoid bus echo */ 863 failures[7] = sio_getreg(com, com_ier); 864 DELAY(1000); /* XXX */ 865 irqmap[3] = isa_irq_pending(); 866 failures[9] = (sio_getreg(com, com_iir) & IIR_IMASK) - IIR_NOPEND; 867 868 com_unlock(); 869 870 irqs = irqmap[1] & ~irqmap[0]; 871 if (bus_get_resource(idev, SYS_RES_IRQ, 0, &xirq, NULL) == 0 && 872 ((1 << xirq) & irqs) == 0) 873 kprintf( 874 "sio%d: configured irq %ld not in bitmap of probed irqs %#x\n", 875 device_get_unit(dev), xirq, irqs); 876 if (bootverbose) 877 kprintf("sio%d: irq maps: %#x %#x %#x %#x\n", 878 device_get_unit(dev), 879 irqmap[0], irqmap[1], irqmap[2], irqmap[3]); 880 881 result = 0; 882 for (fn = 0; fn < sizeof failures; ++fn) 883 if (failures[fn]) { 884 sio_setreg(com, com_mcr, 0); 885 result = ENXIO; 886 if (bootverbose) { 887 kprintf("sio%d: probe failed test(s):", 888 device_get_unit(dev)); 889 for (fn = 0; fn < sizeof failures; ++fn) 890 if (failures[fn]) 891 kprintf(" %d", fn); 892 kprintf("\n"); 893 } 894 break; 895 } 896 bus_release_resource(dev, SYS_RES_IOPORT, rid, port); 897 lwkt_reltoken(&tty_token); 898 return (iobase == siocniobase ? 0 : result); 899 } 900 901 #ifdef COM_ESP 902 static int 903 espattach(struct com_s *com, Port_t esp_port) 904 { 905 u_char dips; 906 u_char val; 907 908 /* 909 * Check the ESP-specific I/O port to see if we're an ESP 910 * card. If not, return failure immediately. 911 */ 912 if ((inb(esp_port) & 0xf3) == 0) { 913 kprintf(" port 0x%x is not an ESP board?\n", esp_port); 914 return (0); 915 } 916 917 lwkt_gettoken(&tty_token); 918 /* 919 * We've got something that claims to be a Hayes ESP card. 920 * Let's hope so. 921 */ 922 923 /* Get the dip-switch configuration */ 924 outb(esp_port + ESP_CMD1, ESP_GETDIPS); 925 dips = inb(esp_port + ESP_STATUS1); 926 927 /* 928 * Bits 0,1 of dips say which COM port we are. 929 */ 930 if (rman_get_start(com->ioportres) == likely_com_ports[dips & 0x03]) 931 kprintf(" : ESP"); 932 else { 933 kprintf(" esp_port has com %d\n", dips & 0x03); 934 lwkt_reltoken(&tty_token); 935 return (0); 936 } 937 938 /* 939 * Check for ESP version 2.0 or later: bits 4,5,6 = 010. 940 */ 941 outb(esp_port + ESP_CMD1, ESP_GETTEST); 942 val = inb(esp_port + ESP_STATUS1); /* clear reg 1 */ 943 val = inb(esp_port + ESP_STATUS2); 944 if ((val & 0x70) < 0x20) { 945 kprintf("-old (%o)", val & 0x70); 946 lwkt_reltoken(&tty_token); 947 return (0); 948 } 949 950 /* 951 * Check for ability to emulate 16550: bit 7 == 1 952 */ 953 if ((dips & 0x80) == 0) { 954 kprintf(" slave"); 955 lwkt_reltoken(&tty_token); 956 return (0); 957 } 958 959 /* 960 * Okay, we seem to be a Hayes ESP card. Whee. 961 */ 962 com->esp = TRUE; 963 com->esp_port = esp_port; 964 lwkt_reltoken(&tty_token); 965 return (1); 966 } 967 #endif /* COM_ESP */ 968 969 static int 970 sio_isa_attach(device_t dev) 971 { 972 return (sioattach(dev, 0, 0UL)); 973 } 974 975 int 976 sioattach(device_t dev, int xrid, u_long rclk) 977 { 978 struct com_s *com; 979 #ifdef COM_ESP 980 Port_t *espp; 981 #endif 982 Port_t iobase; 983 int minorbase; 984 int unit; 985 u_int flags; 986 int rid; 987 struct resource *port; 988 int ret; 989 char tbuf[MAKEDEV_MINNBUF]; 990 char *unit_in_base32; 991 static int did_init; 992 993 lwkt_gettoken(&tty_token); 994 if (did_init == 0) { 995 did_init = 1; 996 callout_init_mp(&sio_timeout_handle); 997 } 998 999 rid = xrid; 1000 port = bus_alloc_resource(dev, SYS_RES_IOPORT, &rid, 1001 0, ~0, IO_COMSIZE, RF_ACTIVE); 1002 if (!port) { 1003 lwkt_reltoken(&tty_token); 1004 return (ENXIO); 1005 } 1006 1007 iobase = rman_get_start(port); 1008 unit = device_get_unit(dev); 1009 com = device_get_softc(dev); 1010 flags = device_get_flags(dev); 1011 1012 if (unit >= sio_numunits) 1013 sio_numunits = unit + 1; 1014 /* 1015 * sioprobe() has initialized the device registers as follows: 1016 * o cfcr = CFCR_8BITS. 1017 * It is most important that CFCR_DLAB is off, so that the 1018 * data port is not hidden when we enable interrupts. 1019 * o ier = 0. 1020 * Interrupts are only enabled when the line is open. 1021 * o mcr = MCR_IENABLE, or 0 if the port has AST/4 compatible 1022 * interrupt control register or the config specifies no irq. 1023 * Keeping MCR_DTR and MCR_RTS off might stop the external 1024 * device from sending before we are ready. 1025 */ 1026 bzero(com, sizeof *com); 1027 com->unit = unit; 1028 com->ioportres = port; 1029 com->bst = rman_get_bustag(port); 1030 com->bsh = rman_get_bushandle(port); 1031 com->cfcr_image = CFCR_8BITS; 1032 com->dtr_wait = 3 * hz; 1033 callout_init_mp(&com->dtr_ch); 1034 callout_init_mp(&com->busy_ch); 1035 com->loses_outints = COM_LOSESOUTINTS(flags) != 0; 1036 com->no_irq = bus_get_resource(dev, SYS_RES_IRQ, 0, NULL, NULL) != 0; 1037 com->tx_fifo_size = 1; 1038 com->obufs[0].l_head = com->obuf1; 1039 com->obufs[1].l_head = com->obuf2; 1040 1041 com->data_port = iobase + com_data; 1042 com->int_id_port = iobase + com_iir; 1043 com->modem_ctl_port = iobase + com_mcr; 1044 com->mcr_image = inb(com->modem_ctl_port); 1045 com->line_status_port = iobase + com_lsr; 1046 com->modem_status_port = iobase + com_msr; 1047 com->intr_ctl_port = iobase + com_ier; 1048 1049 if (rclk == 0) 1050 rclk = DEFAULT_RCLK; 1051 com->rclk = rclk; 1052 1053 /* 1054 * We don't use all the flags from <sys/ttydefaults.h> since they 1055 * are only relevant for logins. It's important to have echo off 1056 * initially so that the line doesn't start blathering before the 1057 * echo flag can be turned off. 1058 */ 1059 com->it_in.c_iflag = 0; 1060 com->it_in.c_oflag = 0; 1061 com->it_in.c_cflag = TTYDEF_CFLAG; 1062 com->it_in.c_lflag = 0; 1063 if (unit == comconsole) { 1064 com->it_in.c_iflag = TTYDEF_IFLAG; 1065 com->it_in.c_oflag = TTYDEF_OFLAG; 1066 com->it_in.c_cflag = TTYDEF_CFLAG | CLOCAL; 1067 com->it_in.c_lflag = TTYDEF_LFLAG; 1068 com->lt_out.c_cflag = com->lt_in.c_cflag = CLOCAL; 1069 com->lt_out.c_ispeed = com->lt_out.c_ospeed = 1070 com->lt_in.c_ispeed = com->lt_in.c_ospeed = 1071 com->it_in.c_ispeed = com->it_in.c_ospeed = comdefaultrate; 1072 } else 1073 com->it_in.c_ispeed = com->it_in.c_ospeed = TTYDEF_SPEED; 1074 if (siosetwater(com, com->it_in.c_ispeed) != 0) { 1075 /* 1076 * Leave i/o resources allocated if this is a `cn'-level 1077 * console, so that other devices can't snarf them. 1078 */ 1079 if (iobase != siocniobase) 1080 bus_release_resource(dev, SYS_RES_IOPORT, rid, port); 1081 lwkt_reltoken(&tty_token); 1082 return (ENOMEM); 1083 } 1084 termioschars(&com->it_in); 1085 com->it_out = com->it_in; 1086 1087 /* attempt to determine UART type */ 1088 kprintf("sio%d: type", unit); 1089 1090 1091 #ifdef COM_MULTIPORT 1092 if (!COM_ISMULTIPORT(flags) && !COM_IIR_TXRDYBUG(flags)) 1093 #else 1094 if (!COM_IIR_TXRDYBUG(flags)) 1095 #endif 1096 { 1097 u_char scr; 1098 u_char scr1; 1099 u_char scr2; 1100 1101 scr = sio_getreg(com, com_scr); 1102 sio_setreg(com, com_scr, 0xa5); 1103 scr1 = sio_getreg(com, com_scr); 1104 sio_setreg(com, com_scr, 0x5a); 1105 scr2 = sio_getreg(com, com_scr); 1106 sio_setreg(com, com_scr, scr); 1107 if (scr1 != 0xa5 || scr2 != 0x5a) { 1108 kprintf(" 8250"); 1109 goto determined_type; 1110 } 1111 } 1112 sio_setreg(com, com_fifo, FIFO_ENABLE | FIFO_RX_HIGH); 1113 DELAY(100); 1114 com->st16650a = 0; 1115 switch (inb(com->int_id_port) & IIR_FIFO_MASK) { 1116 case FIFO_RX_LOW: 1117 kprintf(" 16450"); 1118 break; 1119 case FIFO_RX_MEDL: 1120 kprintf(" 16450?"); 1121 break; 1122 case FIFO_RX_MEDH: 1123 kprintf(" 16550?"); 1124 break; 1125 case FIFO_RX_HIGH: 1126 if (COM_NOFIFO(flags)) { 1127 kprintf(" 16550A fifo disabled"); 1128 } else { 1129 com->hasfifo = TRUE; 1130 if (COM_ST16650A(flags)) { 1131 com->st16650a = 1; 1132 com->tx_fifo_size = 32; 1133 kprintf(" ST16650A"); 1134 } else if (COM_TI16754(flags)) { 1135 com->tx_fifo_size = 64; 1136 kprintf(" TI16754"); 1137 } else { 1138 com->tx_fifo_size = COM_FIFOSIZE(flags); 1139 kprintf(" 16550A"); 1140 } 1141 } 1142 #ifdef COM_ESP 1143 for (espp = likely_esp_ports; *espp != 0; espp++) 1144 if (espattach(com, *espp)) { 1145 com->tx_fifo_size = 1024; 1146 break; 1147 } 1148 #endif 1149 if (!com->st16650a && !COM_TI16754(flags)) { 1150 if (!com->tx_fifo_size) 1151 com->tx_fifo_size = 16; 1152 else 1153 kprintf(" lookalike with %d bytes FIFO", 1154 com->tx_fifo_size); 1155 } 1156 1157 break; 1158 } 1159 #ifdef COM_ESP 1160 if (com->esp) { 1161 /* 1162 * Set 16550 compatibility mode. 1163 * We don't use the ESP_MODE_SCALE bit to increase the 1164 * fifo trigger levels because we can't handle large 1165 * bursts of input. 1166 * XXX flow control should be set in comparam(), not here. 1167 */ 1168 outb(com->esp_port + ESP_CMD1, ESP_SETMODE); 1169 outb(com->esp_port + ESP_CMD2, ESP_MODE_RTS | ESP_MODE_FIFO); 1170 1171 /* Set RTS/CTS flow control. */ 1172 outb(com->esp_port + ESP_CMD1, ESP_SETFLOWTYPE); 1173 outb(com->esp_port + ESP_CMD2, ESP_FLOW_RTS); 1174 outb(com->esp_port + ESP_CMD2, ESP_FLOW_CTS); 1175 1176 /* Set flow-control levels. */ 1177 outb(com->esp_port + ESP_CMD1, ESP_SETRXFLOW); 1178 outb(com->esp_port + ESP_CMD2, HIBYTE(768)); 1179 outb(com->esp_port + ESP_CMD2, LOBYTE(768)); 1180 outb(com->esp_port + ESP_CMD2, HIBYTE(512)); 1181 outb(com->esp_port + ESP_CMD2, LOBYTE(512)); 1182 } 1183 #endif /* COM_ESP */ 1184 sio_setreg(com, com_fifo, 0); 1185 determined_type: ; 1186 1187 #ifdef COM_MULTIPORT 1188 if (COM_ISMULTIPORT(flags)) { 1189 device_t masterdev; 1190 1191 com->multiport = TRUE; 1192 kprintf(" (multiport"); 1193 if (unit == COM_MPMASTER(flags)) 1194 kprintf(" master"); 1195 kprintf(")"); 1196 masterdev = devclass_get_device(sio_devclass, 1197 COM_MPMASTER(flags)); 1198 com->no_irq = (masterdev == NULL || bus_get_resource(masterdev, 1199 SYS_RES_IRQ, 0, NULL, NULL) != 0); 1200 } 1201 #endif /* COM_MULTIPORT */ 1202 if (unit == comconsole) 1203 kprintf(", console"); 1204 if (COM_IIR_TXRDYBUG(flags)) 1205 kprintf(" with a bogus IIR_TXRDY register"); 1206 kprintf("\n"); 1207 1208 if (!sio_registered) { 1209 register_swi_mp(SWI_TTY, siopoll, NULL, 1210 "swi_siopoll", NULL, -1); 1211 sio_registered = TRUE; 1212 } 1213 minorbase = UNIT_TO_MINOR(unit); 1214 unit_in_base32 = makedev_unit_b32(tbuf, unit); 1215 make_dev(&sio_ops, minorbase, 1216 UID_ROOT, GID_WHEEL, 0600, "ttyd%s", unit_in_base32); 1217 make_dev(&sio_ops, minorbase | CONTROL_INIT_STATE, 1218 UID_ROOT, GID_WHEEL, 0600, "ttyid%s", unit_in_base32); 1219 make_dev(&sio_ops, minorbase | CONTROL_LOCK_STATE, 1220 UID_ROOT, GID_WHEEL, 0600, "ttyld%s", unit_in_base32); 1221 make_dev(&sio_ops, minorbase | CALLOUT_MASK, 1222 UID_UUCP, GID_DIALER, 0660, "cuaa%s", unit_in_base32); 1223 make_dev(&sio_ops, minorbase | CALLOUT_MASK | CONTROL_INIT_STATE, 1224 UID_UUCP, GID_DIALER, 0660, "cuaia%s", unit_in_base32); 1225 make_dev(&sio_ops, minorbase | CALLOUT_MASK | CONTROL_LOCK_STATE, 1226 UID_UUCP, GID_DIALER, 0660, "cuala%s", unit_in_base32); 1227 com->flags = flags; 1228 com->pps.ppscap = PPS_CAPTUREASSERT | PPS_CAPTURECLEAR; 1229 pps_init(&com->pps); 1230 1231 rid = 0; 1232 com->irqres = bus_alloc_resource(dev, SYS_RES_IRQ, &rid, 0ul, ~0ul, 1, 1233 RF_ACTIVE); 1234 if (com->irqres) { 1235 ret = BUS_SETUP_INTR(device_get_parent(dev), dev, 1236 com->irqres, INTR_MPSAFE, siointr, com, 1237 &com->cookie, NULL, NULL); 1238 if (ret) 1239 device_printf(dev, "could not activate interrupt\n"); 1240 #if defined(DDB) 1241 /* 1242 * Enable interrupts for early break-to-debugger support 1243 * on the console. 1244 */ 1245 if (ret == 0 && unit == comconsole && 1246 (break_to_debugger || alt_break_to_debugger)) { 1247 inb(siocniobase + com_data); 1248 outb(siocniobase + com_ier, 1249 IER_ERXRDY | IER_ERLS | IER_EMSC); 1250 } 1251 #endif 1252 } 1253 1254 lwkt_reltoken(&tty_token); 1255 return (0); 1256 } 1257 1258 static int 1259 sioopen(struct dev_open_args *ap) 1260 { 1261 cdev_t dev = ap->a_head.a_dev; 1262 struct com_s *com; 1263 int error; 1264 int mynor; 1265 struct tty *tp; 1266 int unit; 1267 1268 mynor = minor(dev); 1269 unit = MINOR_TO_UNIT(mynor); 1270 com = com_addr(unit); 1271 if (com == NULL) 1272 return (ENXIO); 1273 if (com->gone) 1274 return (ENXIO); 1275 if (mynor & CONTROL_MASK) 1276 return (0); 1277 lwkt_gettoken(&tty_token); 1278 tp = ttymalloc(&com->tp); 1279 dev->si_tty = tp; 1280 crit_enter(); 1281 /* 1282 * We jump to this label after all non-interrupted sleeps to pick 1283 * up any changes of the device state. 1284 */ 1285 open_top: 1286 while (com->state & CS_DTR_OFF) { 1287 error = tsleep(&com->dtr_wait, PCATCH, "siodtr", 0); 1288 if (com_addr(unit) == NULL) { 1289 crit_exit(); 1290 lwkt_reltoken(&tty_token); 1291 return (ENXIO); 1292 } 1293 if (error != 0 || com->gone) 1294 goto out; 1295 } 1296 if (tp->t_state & TS_ISOPEN) { 1297 /* 1298 * The device is open, so everything has been initialized. 1299 * Handle conflicts. 1300 */ 1301 if (mynor & CALLOUT_MASK) { 1302 if (!com->active_out) { 1303 error = EBUSY; 1304 goto out; 1305 } 1306 } else { 1307 if (com->active_out) { 1308 if (ap->a_oflags & O_NONBLOCK) { 1309 error = EBUSY; 1310 goto out; 1311 } 1312 error = tsleep(&com->active_out, 1313 PCATCH, "siobi", 0); 1314 if (com_addr(unit) == NULL) { 1315 crit_exit(); 1316 lwkt_reltoken(&tty_token); 1317 return (ENXIO); 1318 } 1319 if (error != 0 || com->gone) 1320 goto out; 1321 goto open_top; 1322 } 1323 } 1324 if ((tp->t_state & TS_XCLUDE) && 1325 caps_priv_check(ap->a_cred, SYSCAP_RESTRICTEDROOT)) 1326 { 1327 error = EBUSY; 1328 goto out; 1329 } 1330 } else { 1331 /* 1332 * The device isn't open, so there are no conflicts. 1333 * Initialize it. Initialization is done twice in many 1334 * cases: to preempt sleeping callin opens if we are 1335 * callout, and to complete a callin open after DCD rises. 1336 */ 1337 tp->t_oproc = comstart; 1338 tp->t_param = comparam; 1339 tp->t_stop = comstop; 1340 tp->t_dev = dev; 1341 tp->t_termios = mynor & CALLOUT_MASK 1342 ? com->it_out : com->it_in; 1343 (void)commctl(com, TIOCM_DTR | TIOCM_RTS, DMSET); 1344 com->poll = com->no_irq; 1345 com->poll_output = com->loses_outints; 1346 ++com->wopeners; 1347 error = comparam(tp, &tp->t_termios); 1348 --com->wopeners; 1349 if (error != 0) 1350 goto out; 1351 /* 1352 * XXX we should goto open_top if comparam() slept. 1353 */ 1354 if (com->hasfifo) { 1355 /* 1356 * (Re)enable and drain fifos. 1357 * 1358 * Certain SMC chips cause problems if the fifos 1359 * are enabled while input is ready. Turn off the 1360 * fifo if necessary to clear the input. We test 1361 * the input ready bit after enabling the fifos 1362 * since we've already enabled them in comparam() 1363 * and to handle races between enabling and fresh 1364 * input. 1365 */ 1366 while (TRUE) { 1367 sio_setreg(com, com_fifo, 1368 FIFO_RCV_RST | FIFO_XMT_RST 1369 | com->fifo_image); 1370 /* 1371 * XXX the delays are for superstitious 1372 * historical reasons. It must be less than 1373 * the character time at the maximum 1374 * supported speed (87 usec at 115200 bps 1375 * 8N1). Otherwise we might loop endlessly 1376 * if data is streaming in. We used to use 1377 * delays of 100. That usually worked 1378 * because DELAY(100) used to usually delay 1379 * for about 85 usec instead of 100. 1380 */ 1381 DELAY(50); 1382 if (!(inb(com->line_status_port) & LSR_RXRDY)) 1383 break; 1384 sio_setreg(com, com_fifo, 0); 1385 DELAY(50); 1386 (void) inb(com->data_port); 1387 } 1388 } 1389 1390 com_lock(); 1391 (void) inb(com->line_status_port); 1392 (void) inb(com->data_port); 1393 com->prev_modem_status = com->last_modem_status 1394 = inb(com->modem_status_port); 1395 if (COM_IIR_TXRDYBUG(com->flags)) { 1396 outb(com->intr_ctl_port, IER_ERXRDY | IER_ERLS 1397 | IER_EMSC); 1398 } else { 1399 outb(com->intr_ctl_port, IER_ERXRDY | IER_ETXRDY 1400 | IER_ERLS | IER_EMSC); 1401 } 1402 com_unlock(); 1403 /* 1404 * Handle initial DCD. Callout devices get a fake initial 1405 * DCD (trapdoor DCD). If we are callout, then any sleeping 1406 * callin opens get woken up and resume sleeping on "siobi" 1407 * instead of "siodcd". 1408 */ 1409 /* 1410 * XXX `mynor & CALLOUT_MASK' should be 1411 * `tp->t_cflag & (SOFT_CARRIER | TRAPDOOR_CARRIER) where 1412 * TRAPDOOR_CARRIER is the default initial state for callout 1413 * devices and SOFT_CARRIER is like CLOCAL except it hides 1414 * the true carrier. 1415 */ 1416 if (com->prev_modem_status & MSR_DCD || mynor & CALLOUT_MASK) 1417 (*linesw[tp->t_line].l_modem)(tp, 1); 1418 } 1419 /* 1420 * Wait for DCD if necessary. 1421 */ 1422 if (!(tp->t_state & TS_CARR_ON) && !(mynor & CALLOUT_MASK) 1423 && !(tp->t_cflag & CLOCAL) && !(ap->a_oflags & O_NONBLOCK)) { 1424 ++com->wopeners; 1425 error = tsleep(TSA_CARR_ON(tp), PCATCH, "siodcd", 0); 1426 if (com_addr(unit) == NULL) { 1427 crit_exit(); 1428 lwkt_reltoken(&tty_token); 1429 return (ENXIO); 1430 } 1431 --com->wopeners; 1432 if (error != 0 || com->gone) 1433 goto out; 1434 goto open_top; 1435 } 1436 error = (*linesw[tp->t_line].l_open)(dev, tp); 1437 disc_optim(tp, &tp->t_termios, com); 1438 if (tp->t_state & TS_ISOPEN && mynor & CALLOUT_MASK) 1439 com->active_out = TRUE; 1440 siosettimeout(); 1441 out: 1442 crit_exit(); 1443 if (!(tp->t_state & TS_ISOPEN) && com->wopeners == 0) 1444 comhardclose(com); 1445 lwkt_reltoken(&tty_token); 1446 return (error); 1447 } 1448 1449 static int 1450 sioclose(struct dev_close_args *ap) 1451 { 1452 cdev_t dev = ap->a_head.a_dev; 1453 struct com_s *com; 1454 int mynor; 1455 struct tty *tp; 1456 1457 mynor = minor(dev); 1458 if (mynor & CONTROL_MASK) 1459 return (0); 1460 lwkt_gettoken(&tty_token); 1461 com = com_addr(MINOR_TO_UNIT(mynor)); 1462 if (com == NULL) { 1463 lwkt_reltoken(&tty_token); 1464 return (ENODEV); 1465 } 1466 tp = com->tp; 1467 crit_enter(); 1468 (*linesw[tp->t_line].l_close)(tp, ap->a_fflag); 1469 disc_optim(tp, &tp->t_termios, com); 1470 comstop(tp, FREAD | FWRITE); 1471 comhardclose(com); 1472 ttyclose(tp); 1473 siosettimeout(); 1474 crit_exit(); 1475 if (com->gone) { 1476 kprintf("sio%d: gone\n", com->unit); 1477 crit_enter(); 1478 if (com->ibuf != NULL) 1479 kfree(com->ibuf, M_DEVBUF); 1480 bzero(tp, sizeof *tp); 1481 crit_exit(); 1482 } 1483 lwkt_reltoken(&tty_token); 1484 return (0); 1485 } 1486 1487 static void 1488 comhardclose(struct com_s *com) 1489 { 1490 struct tty *tp; 1491 crit_enter(); 1492 lwkt_gettoken(&tty_token); 1493 com->poll = FALSE; 1494 com->poll_output = FALSE; 1495 com->do_timestamp = FALSE; 1496 com->do_dcd_timestamp = FALSE; 1497 com->pps.ppsparam.mode = 0; 1498 sio_setreg(com, com_cfcr, com->cfcr_image &= ~CFCR_SBREAK); 1499 tp = com->tp; 1500 1501 #if defined(DDB) 1502 /* 1503 * Leave interrupts enabled and don't clear DTR if this is the 1504 * console. This allows us to detect break-to-debugger events 1505 * while the console device is closed. 1506 */ 1507 if (com->unit != comconsole || 1508 (break_to_debugger == 0 && alt_break_to_debugger == 0)) 1509 #endif 1510 { 1511 sio_setreg(com, com_ier, 0); 1512 if (tp->t_cflag & HUPCL 1513 /* 1514 * XXX we will miss any carrier drop between here and the 1515 * next open. Perhaps we should watch DCD even when the 1516 * port is closed; it is not sufficient to check it at 1517 * the next open because it might go up and down while 1518 * we're not watching. 1519 */ 1520 || (!com->active_out 1521 && !(com->prev_modem_status & MSR_DCD) 1522 && !(com->it_in.c_cflag & CLOCAL)) 1523 || !(tp->t_state & TS_ISOPEN)) { 1524 (void)commctl(com, TIOCM_DTR, DMBIC); 1525 if (com->dtr_wait != 0 && !(com->state & CS_DTR_OFF)) { 1526 callout_reset(&com->dtr_ch, com->dtr_wait, 1527 siodtrwakeup, com); 1528 com->state |= CS_DTR_OFF; 1529 } 1530 } 1531 } 1532 if (com->hasfifo) { 1533 /* 1534 * Disable fifos so that they are off after controlled 1535 * reboots. Some BIOSes fail to detect 16550s when the 1536 * fifos are enabled. 1537 */ 1538 sio_setreg(com, com_fifo, 0); 1539 } 1540 com->active_out = FALSE; 1541 wakeup(&com->active_out); 1542 wakeup(TSA_CARR_ON(tp)); /* restart any wopeners */ 1543 lwkt_reltoken(&tty_token); 1544 crit_exit(); 1545 } 1546 1547 static int 1548 sioread(struct dev_read_args *ap) 1549 { 1550 cdev_t dev = ap->a_head.a_dev; 1551 int mynor, ret; 1552 struct com_s *com; 1553 1554 lwkt_gettoken(&tty_token); 1555 mynor = minor(dev); 1556 if (mynor & CONTROL_MASK) { 1557 lwkt_reltoken(&tty_token); 1558 return (ENODEV); 1559 } 1560 com = com_addr(MINOR_TO_UNIT(mynor)); 1561 if (com == NULL || com->gone) { 1562 lwkt_reltoken(&tty_token); 1563 return (ENODEV); 1564 } 1565 ret = ((*linesw[com->tp->t_line].l_read)(com->tp, ap->a_uio, ap->a_ioflag)); 1566 lwkt_reltoken(&tty_token); 1567 return ret; 1568 } 1569 1570 static int 1571 siowrite(struct dev_write_args *ap) 1572 { 1573 cdev_t dev = ap->a_head.a_dev; 1574 int mynor; 1575 struct com_s *com; 1576 int unit, ret; 1577 1578 lwkt_gettoken(&tty_token); 1579 mynor = minor(dev); 1580 if (mynor & CONTROL_MASK) { 1581 lwkt_reltoken(&tty_token); 1582 return (ENODEV); 1583 } 1584 1585 unit = MINOR_TO_UNIT(mynor); 1586 com = com_addr(unit); 1587 if (com == NULL || com->gone) { 1588 lwkt_reltoken(&tty_token); 1589 return (ENODEV); 1590 } 1591 /* 1592 * (XXX) We disallow virtual consoles if the physical console is 1593 * a serial port. This is in case there is a display attached that 1594 * is not the console. In that situation we don't need/want the X 1595 * server taking over the console. 1596 */ 1597 if (constty != NULL && unit == comconsole) 1598 constty = NULL; 1599 ret = ((*linesw[com->tp->t_line].l_write)(com->tp, ap->a_uio, ap->a_ioflag)); 1600 lwkt_reltoken(&tty_token); 1601 return ret; 1602 } 1603 1604 static void 1605 siobusycheck(void *chan) 1606 { 1607 struct com_s *com; 1608 1609 lwkt_gettoken(&tty_token); 1610 com = (struct com_s *)chan; 1611 1612 /* 1613 * Clear TS_BUSY if low-level output is complete. 1614 * spl locking is sufficient because siointr1() does not set CS_BUSY. 1615 * If siointr1() clears CS_BUSY after we look at it, then we'll get 1616 * called again. Reading the line status port outside of siointr1() 1617 * is safe because CS_BUSY is clear so there are no output interrupts 1618 * to lose. 1619 */ 1620 crit_enter(); 1621 if (com->state & CS_BUSY) 1622 com->extra_state &= ~CSE_BUSYCHECK; /* False alarm. */ 1623 else if ((inb(com->line_status_port) & (LSR_TSRE | LSR_TXRDY)) 1624 == (LSR_TSRE | LSR_TXRDY)) { 1625 com->tp->t_state &= ~TS_BUSY; 1626 ttwwakeup(com->tp); 1627 com->extra_state &= ~CSE_BUSYCHECK; 1628 } else { 1629 callout_reset(&com->busy_ch, hz / 100, siobusycheck, com); 1630 } 1631 crit_exit(); 1632 lwkt_reltoken(&tty_token); 1633 } 1634 1635 static u_int 1636 siodivisor(u_long rclk, speed_t speed) 1637 { 1638 long actual_speed; 1639 u_int divisor; 1640 int error; 1641 1642 if (speed == 0 || speed > ((speed_t)-1 - 1) / 8) 1643 return (0); 1644 divisor = (rclk / (8UL * speed) + 1) / 2; 1645 if (divisor == 0 || divisor >= 65536) 1646 return (0); 1647 actual_speed = rclk / (16UL * divisor); 1648 1649 /* 10 times error in percent: */ 1650 error = ((actual_speed - (long)speed) * 2000 / (long)speed + 1) / 2; 1651 1652 /* 3.0% maximum error tolerance: */ 1653 if (error < -30 || error > 30) 1654 return (0); 1655 1656 return (divisor); 1657 } 1658 1659 static void 1660 siodtrwakeup(void *chan) 1661 { 1662 struct com_s *com; 1663 1664 lwkt_gettoken(&tty_token); 1665 com = (struct com_s *)chan; 1666 com->state &= ~CS_DTR_OFF; 1667 wakeup(&com->dtr_wait); 1668 lwkt_reltoken(&tty_token); 1669 } 1670 1671 /* 1672 * NOTE: Normally called with tty_token held but might not be when 1673 * operating as the console. 1674 * 1675 * Must be called with com_lock 1676 */ 1677 #define SIOCOPYSIZE 64 1678 1679 static void 1680 sioinput(struct com_s *com) 1681 { 1682 u_char line_status; 1683 int recv_data; 1684 int incc; 1685 int i; 1686 struct tty *tp; 1687 uint8_t buf[SIOCOPYSIZE]; 1688 1689 /* 1690 * Process a block of data queued by siointr1() and shift the buffer 1691 * in order to allow the interrupt to continue to pipeline data as 1692 * we process each block. This is a retrofit of old code, otherwise 1693 * I'd just use a rollover FIFO. 1694 */ 1695 tp = com->tp; 1696 again: 1697 if (!(tp->t_state & TS_ISOPEN) || !(tp->t_cflag & CREAD)) { 1698 com->iptr = com->ibuf; 1699 return; 1700 } 1701 incc = com->iptr - com->ibuf; 1702 if (incc > SIOCOPYSIZE) { 1703 bcopy(com->ibuf, buf, SIOCOPYSIZE); 1704 bcopy(com->ibuf + SIOCOPYSIZE, com->ibuf, incc - SIOCOPYSIZE); 1705 com->iptr = com->ibuf + incc - SIOCOPYSIZE; 1706 incc = SIOCOPYSIZE; 1707 } else { 1708 bcopy(com->ibuf, buf, incc); 1709 com->iptr = com->ibuf; 1710 } 1711 line_status = com->iptr[com->ierroff]; 1712 1713 /* 1714 * There is now room for another low-level buffer full of input, 1715 * so enable RTS if it is now disabled and there is room in the 1716 * high-level buffer. 1717 */ 1718 if ((com->state & CS_RTS_IFLOW) && !(com->mcr_image & MCR_RTS) && 1719 !(tp->t_state & TS_TBLOCK)) { 1720 outb(com->modem_ctl_port, com->mcr_image |= MCR_RTS); 1721 } 1722 com_unlock(); 1723 1724 /* 1725 * Process the input block 1726 */ 1727 for (i = 0; i < incc; ++i) { 1728 recv_data = buf[i]; 1729 if (line_status 1730 & (LSR_BI | LSR_FE | LSR_OE | LSR_PE)) { 1731 if (line_status & LSR_BI) 1732 recv_data |= TTY_BI; 1733 if (line_status & LSR_FE) 1734 recv_data |= TTY_FE; 1735 if (line_status & LSR_OE) 1736 recv_data |= TTY_OE; 1737 if (line_status & LSR_PE) 1738 recv_data |= TTY_PE; 1739 } 1740 (*linesw[tp->t_line].l_rint)(recv_data, tp); 1741 line_status = 0; 1742 } 1743 com_lock(); 1744 1745 if (com->iptr != com->ibuf) 1746 goto again; 1747 } 1748 1749 static void 1750 siointr(void *arg) 1751 { 1752 lwkt_gettoken(&tty_token); 1753 #ifndef COM_MULTIPORT 1754 com_lock(); 1755 siointr1((struct com_s *) arg); 1756 com_unlock(); 1757 #else /* COM_MULTIPORT */ 1758 bool_t possibly_more_intrs; 1759 int unit; 1760 struct com_s *com; 1761 1762 /* 1763 * Loop until there is no activity on any port. This is necessary 1764 * to get an interrupt edge more than to avoid another interrupt. 1765 * If the IRQ signal is just an OR of the IRQ signals from several 1766 * devices, then the edge from one may be lost because another is 1767 * on. 1768 */ 1769 com_lock(); 1770 do { 1771 possibly_more_intrs = FALSE; 1772 for (unit = 0; unit < sio_numunits; ++unit) { 1773 com = com_addr(unit); 1774 /* 1775 * XXX com_lock(); 1776 * would it work here, or be counter-productive? 1777 */ 1778 if (com != NULL 1779 && !com->gone 1780 && (inb(com->int_id_port) & IIR_IMASK) 1781 != IIR_NOPEND) { 1782 siointr1(com); 1783 possibly_more_intrs = TRUE; 1784 } 1785 /* XXX com_unlock(); */ 1786 } 1787 } while (possibly_more_intrs); 1788 com_unlock(); 1789 #endif /* COM_MULTIPORT */ 1790 lwkt_reltoken(&tty_token); 1791 } 1792 1793 /* 1794 * Called with tty_token held and com_lock held. 1795 */ 1796 static void 1797 siointr1(struct com_s *com) 1798 { 1799 u_char line_status; 1800 u_char modem_status; 1801 u_char *ioptr; 1802 u_char recv_data; 1803 u_char int_ctl; 1804 u_char int_ctl_new; 1805 sysclock_t count; 1806 1807 int_ctl = inb(com->intr_ctl_port); 1808 int_ctl_new = int_ctl; 1809 1810 while (!com->gone) { 1811 if (com->pps.ppsparam.mode & PPS_CAPTUREBOTH) { 1812 modem_status = inb(com->modem_status_port); 1813 if ((modem_status ^ com->last_modem_status) & MSR_DCD) { 1814 count = sys_cputimer->count(); 1815 pps_event(&com->pps, count, 1816 (modem_status & MSR_DCD) ? 1817 PPS_CAPTUREASSERT : PPS_CAPTURECLEAR); 1818 } 1819 } 1820 line_status = inb(com->line_status_port); 1821 1822 /* input event? (check first to help avoid overruns) */ 1823 while (line_status & LSR_RCV_MASK) { 1824 /* break/unnattached error bits or real input? */ 1825 if (!(line_status & LSR_RXRDY)) 1826 recv_data = 0; 1827 else 1828 recv_data = inb(com->data_port); 1829 #if defined(DDB) 1830 /* 1831 * Solaris implements a new BREAK which is initiated 1832 * by a character sequence CR ~ ^b which is similar 1833 * to a familiar pattern used on Sun servers by the 1834 * Remote Console. 1835 */ 1836 #define KEY_CRTLB 2 /* ^B */ 1837 #define KEY_CR 13 /* CR '\r' */ 1838 #define KEY_TILDE 126 /* ~ */ 1839 1840 if (com->unit == comconsole && alt_break_to_debugger) { 1841 static int brk_state1 = 0, brk_state2 = 0; 1842 if (recv_data == KEY_CR) { 1843 brk_state1 = recv_data; 1844 brk_state2 = 0; 1845 } else if (brk_state1 == KEY_CR && (recv_data == KEY_TILDE || recv_data == KEY_CRTLB)) { 1846 if (recv_data == KEY_TILDE) 1847 brk_state2 = recv_data; 1848 else if (brk_state2 == KEY_TILDE && recv_data == KEY_CRTLB) { 1849 com_unlock(); 1850 breakpoint(); 1851 com_lock(); 1852 brk_state1 = brk_state2 = 0; 1853 goto cont; 1854 } else 1855 brk_state2 = 0; 1856 } else 1857 brk_state1 = 0; 1858 } 1859 #endif 1860 if (line_status & (LSR_BI | LSR_FE | LSR_PE)) { 1861 /* 1862 * Don't store BI if IGNBRK or FE/PE if IGNPAR. 1863 * Otherwise, push the work to a higher level 1864 * (to handle PARMRK) if we're bypassing. 1865 * Otherwise, convert BI/FE and PE+INPCK to 0. 1866 * 1867 * This makes bypassing work right in the 1868 * usual "raw" case (IGNBRK set, and IGNPAR 1869 * and INPCK clear). 1870 * 1871 * Note: BI together with FE/PE means just BI. 1872 */ 1873 if (line_status & LSR_BI) { 1874 #if defined(DDB) 1875 if (com->unit == comconsole && 1876 break_to_debugger) { 1877 com_unlock(); 1878 breakpoint(); 1879 com_lock(); 1880 goto cont; 1881 } 1882 #endif 1883 if (com->tp == NULL 1884 || com->tp->t_iflag & IGNBRK) 1885 goto cont; 1886 } else { 1887 if (com->tp == NULL 1888 || com->tp->t_iflag & IGNPAR) 1889 goto cont; 1890 } 1891 if (com->tp->t_state & TS_CAN_BYPASS_L_RINT 1892 && (line_status & (LSR_BI | LSR_FE) 1893 || com->tp->t_iflag & INPCK)) 1894 recv_data = 0; 1895 } 1896 ++com->bytes_in; 1897 if (com->hotchar != 0 && recv_data == com->hotchar) 1898 setsofttty(); 1899 ioptr = com->iptr; 1900 if (ioptr >= com->ibufend) { 1901 CE_RECORD(com, CE_INTERRUPT_BUF_OVERFLOW); 1902 } else { 1903 if (com->do_timestamp) 1904 microtime(&com->timestamp); 1905 schedsofttty(); 1906 #if 0 /* for testing input latency vs efficiency */ 1907 if (com->iptr - com->ibuf == 8) 1908 setsofttty(); 1909 #endif 1910 ioptr[0] = recv_data; 1911 ioptr[com->ierroff] = line_status; 1912 com->iptr = ++ioptr; 1913 if (ioptr == com->ihighwater 1914 && com->state & CS_RTS_IFLOW) 1915 outb(com->modem_ctl_port, 1916 com->mcr_image &= ~MCR_RTS); 1917 if (line_status & LSR_OE) 1918 CE_RECORD(com, CE_OVERRUN); 1919 } 1920 cont: 1921 /* 1922 * "& 0x7F" is to avoid the gcc-1.40 generating a slow 1923 * jump from the top of the loop to here 1924 */ 1925 line_status = inb(com->line_status_port) & 0x7F; 1926 } 1927 1928 /* modem status change? (always check before doing output) */ 1929 modem_status = inb(com->modem_status_port); 1930 if (modem_status != com->last_modem_status) { 1931 if (com->do_dcd_timestamp 1932 && !(com->last_modem_status & MSR_DCD) 1933 && modem_status & MSR_DCD) 1934 microtime(&com->dcd_timestamp); 1935 1936 /* 1937 * Schedule high level to handle DCD changes. Note 1938 * that we don't use the delta bits anywhere. Some 1939 * UARTs mess them up, and it's easy to remember the 1940 * previous bits and calculate the delta. 1941 */ 1942 com->last_modem_status = modem_status; 1943 if (!(com->state & CS_CHECKMSR)) { 1944 com->state |= CS_CHECKMSR; 1945 setsofttty(); 1946 } 1947 1948 /* handle CTS change immediately for crisp flow ctl */ 1949 if (com->state & CS_CTS_OFLOW) { 1950 if (modem_status & MSR_CTS) 1951 com->state |= CS_ODEVREADY; 1952 else 1953 com->state &= ~CS_ODEVREADY; 1954 } 1955 } 1956 1957 /* output queued and everything ready? */ 1958 if ((line_status & LSR_TXRDY) 1959 && com->state >= (CS_BUSY | CS_TTGO | CS_ODEVREADY)) { 1960 ioptr = com->obufq.l_head; 1961 if (com->tx_fifo_size > 1) { 1962 u_int ocount; 1963 1964 ocount = com->obufq.l_tail - ioptr; 1965 if (ocount > com->tx_fifo_size) 1966 ocount = com->tx_fifo_size; 1967 com->bytes_out += ocount; 1968 do 1969 outb(com->data_port, *ioptr++); 1970 while (--ocount != 0); 1971 } else { 1972 outb(com->data_port, *ioptr++); 1973 ++com->bytes_out; 1974 } 1975 com->obufq.l_head = ioptr; 1976 if (COM_IIR_TXRDYBUG(com->flags)) { 1977 int_ctl_new = int_ctl | IER_ETXRDY; 1978 } 1979 if (ioptr >= com->obufq.l_tail) { 1980 struct lbq *qp; 1981 1982 qp = com->obufq.l_next; 1983 qp->l_queued = FALSE; 1984 qp = qp->l_next; 1985 if (qp != NULL) { 1986 com->obufq.l_head = qp->l_head; 1987 com->obufq.l_tail = qp->l_tail; 1988 com->obufq.l_next = qp; 1989 } else { 1990 /* output just completed */ 1991 if (COM_IIR_TXRDYBUG(com->flags)) { 1992 int_ctl_new = int_ctl & ~IER_ETXRDY; 1993 } 1994 com->state &= ~CS_BUSY; 1995 } 1996 if (!(com->state & CS_ODONE)) { 1997 com->state |= CS_ODONE; 1998 setsofttty(); /* handle at high level ASAP */ 1999 } 2000 } 2001 if (COM_IIR_TXRDYBUG(com->flags) && (int_ctl != int_ctl_new)) { 2002 outb(com->intr_ctl_port, int_ctl_new); 2003 } 2004 } 2005 2006 /* finished? */ 2007 #ifdef COM_MULTIPORT 2008 return; 2009 #else 2010 if (inb(com->int_id_port) & IIR_NOPEND) 2011 return; 2012 #endif 2013 } 2014 } 2015 2016 static int 2017 sioioctl(struct dev_ioctl_args *ap) 2018 { 2019 cdev_t dev = ap->a_head.a_dev; 2020 caddr_t data = ap->a_data; 2021 struct com_s *com; 2022 int error; 2023 int mynor; 2024 struct tty *tp; 2025 2026 lwkt_gettoken(&tty_token); 2027 mynor = minor(dev); 2028 2029 com = com_addr(MINOR_TO_UNIT(mynor)); 2030 if (com == NULL || com->gone) { 2031 lwkt_reltoken(&tty_token); 2032 return (ENODEV); 2033 } 2034 if (mynor & CONTROL_MASK) { 2035 struct termios *ct; 2036 2037 switch (mynor & CONTROL_MASK) { 2038 case CONTROL_INIT_STATE: 2039 ct = mynor & CALLOUT_MASK ? &com->it_out : &com->it_in; 2040 break; 2041 case CONTROL_LOCK_STATE: 2042 ct = mynor & CALLOUT_MASK ? &com->lt_out : &com->lt_in; 2043 break; 2044 default: 2045 lwkt_reltoken(&tty_token); 2046 return (ENODEV); /* /dev/nodev */ 2047 } 2048 switch (ap->a_cmd) { 2049 case TIOCSETA: 2050 error = caps_priv_check(ap->a_cred, 2051 SYSCAP_RESTRICTEDROOT); 2052 if (error != 0) { 2053 lwkt_reltoken(&tty_token); 2054 return (error); 2055 } 2056 *ct = *(struct termios *)data; 2057 lwkt_reltoken(&tty_token); 2058 return (0); 2059 case TIOCGETA: 2060 *(struct termios *)data = *ct; 2061 lwkt_reltoken(&tty_token); 2062 return (0); 2063 case TIOCGETD: 2064 *(int *)data = TTYDISC; 2065 lwkt_reltoken(&tty_token); 2066 return (0); 2067 case TIOCGWINSZ: 2068 bzero(data, sizeof(struct winsize)); 2069 lwkt_reltoken(&tty_token); 2070 return (0); 2071 default: 2072 lwkt_reltoken(&tty_token); 2073 return (ENOTTY); 2074 } 2075 } 2076 tp = com->tp; 2077 if (ap->a_cmd == TIOCSETA || ap->a_cmd == TIOCSETAW || 2078 ap->a_cmd == TIOCSETAF) { 2079 int cc; 2080 struct termios *dt = (struct termios *)data; 2081 struct termios *lt = mynor & CALLOUT_MASK 2082 ? &com->lt_out : &com->lt_in; 2083 2084 dt->c_iflag = (tp->t_iflag & lt->c_iflag) 2085 | (dt->c_iflag & ~lt->c_iflag); 2086 dt->c_oflag = (tp->t_oflag & lt->c_oflag) 2087 | (dt->c_oflag & ~lt->c_oflag); 2088 dt->c_cflag = (tp->t_cflag & lt->c_cflag) 2089 | (dt->c_cflag & ~lt->c_cflag); 2090 dt->c_lflag = (tp->t_lflag & lt->c_lflag) 2091 | (dt->c_lflag & ~lt->c_lflag); 2092 for (cc = 0; cc < NCCS; ++cc) 2093 if (lt->c_cc[cc] != 0) 2094 dt->c_cc[cc] = tp->t_cc[cc]; 2095 if (lt->c_ispeed != 0) 2096 dt->c_ispeed = tp->t_ispeed; 2097 if (lt->c_ospeed != 0) 2098 dt->c_ospeed = tp->t_ospeed; 2099 } 2100 error = (*linesw[tp->t_line].l_ioctl)(tp, ap->a_cmd, data, ap->a_fflag, ap->a_cred); 2101 if (error != ENOIOCTL) { 2102 lwkt_reltoken(&tty_token); 2103 return (error); 2104 } 2105 crit_enter(); 2106 error = ttioctl(tp, ap->a_cmd, data, ap->a_fflag); 2107 disc_optim(tp, &tp->t_termios, com); 2108 if (error != ENOIOCTL) { 2109 crit_exit(); 2110 lwkt_reltoken(&tty_token); 2111 return (error); 2112 } 2113 switch (ap->a_cmd) { 2114 case TIOCSBRK: 2115 sio_setreg(com, com_cfcr, com->cfcr_image |= CFCR_SBREAK); 2116 break; 2117 case TIOCCBRK: 2118 sio_setreg(com, com_cfcr, com->cfcr_image &= ~CFCR_SBREAK); 2119 break; 2120 case TIOCSDTR: 2121 (void)commctl(com, TIOCM_DTR, DMBIS); 2122 break; 2123 case TIOCCDTR: 2124 (void)commctl(com, TIOCM_DTR, DMBIC); 2125 break; 2126 /* 2127 * XXX should disallow changing MCR_RTS if CS_RTS_IFLOW is set. The 2128 * changes get undone on the next call to comparam(). 2129 */ 2130 case TIOCMSET: 2131 (void)commctl(com, *(int *)data, DMSET); 2132 break; 2133 case TIOCMBIS: 2134 (void)commctl(com, *(int *)data, DMBIS); 2135 break; 2136 case TIOCMBIC: 2137 (void)commctl(com, *(int *)data, DMBIC); 2138 break; 2139 case TIOCMGET: 2140 *(int *)data = commctl(com, 0, DMGET); 2141 break; 2142 case TIOCMSDTRWAIT: 2143 /* must be root since the wait applies to following logins */ 2144 error = caps_priv_check(ap->a_cred, SYSCAP_RESTRICTEDROOT); 2145 if (error != 0) { 2146 crit_exit(); 2147 lwkt_reltoken(&tty_token); 2148 return (error); 2149 } 2150 com->dtr_wait = *(int *)data * hz / 100; 2151 break; 2152 case TIOCMGDTRWAIT: 2153 *(int *)data = com->dtr_wait * 100 / hz; 2154 break; 2155 case TIOCTIMESTAMP: 2156 com->do_timestamp = TRUE; 2157 *(struct timeval *)data = com->timestamp; 2158 break; 2159 case TIOCDCDTIMESTAMP: 2160 com->do_dcd_timestamp = TRUE; 2161 *(struct timeval *)data = com->dcd_timestamp; 2162 break; 2163 default: 2164 crit_exit(); 2165 error = pps_ioctl(ap->a_cmd, data, &com->pps); 2166 if (error == ENODEV) 2167 error = ENOTTY; 2168 lwkt_reltoken(&tty_token); 2169 return (error); 2170 } 2171 crit_exit(); 2172 lwkt_reltoken(&tty_token); 2173 return (0); 2174 } 2175 2176 static void 2177 siopoll(void *dummy, void *frame) 2178 { 2179 int unit; 2180 int any; 2181 2182 lwkt_gettoken(&tty_token); 2183 repeat: 2184 any = 0; 2185 for (unit = 0; unit < sio_numunits; ++unit) { 2186 struct com_s *com; 2187 int incc; 2188 struct tty *tp; 2189 2190 com = com_addr(unit); 2191 if (com == NULL) 2192 continue; 2193 tp = com->tp; 2194 if (tp == NULL || com->gone) { 2195 /* 2196 * Discard any events related to never-opened or 2197 * going-away devices. 2198 */ 2199 com_lock(); 2200 incc = com->iptr - com->ibuf; 2201 com->iptr = com->ibuf; 2202 if (com->state & CS_CHECKMSR) { 2203 incc += LOTS_OF_EVENTS; 2204 com->state &= ~CS_CHECKMSR; 2205 } 2206 com_unlock(); 2207 continue; 2208 } 2209 if (com->iptr != com->ibuf) { 2210 com_lock(); 2211 sioinput(com); 2212 com_unlock(); 2213 any = 1; 2214 } 2215 if (com->state & CS_CHECKMSR) { 2216 u_char delta_modem_status; 2217 2218 com_lock(); 2219 delta_modem_status = com->last_modem_status 2220 ^ com->prev_modem_status; 2221 com->prev_modem_status = com->last_modem_status; 2222 com->state &= ~CS_CHECKMSR; 2223 com_unlock(); 2224 if (delta_modem_status) 2225 any = 1; 2226 if (delta_modem_status & MSR_DCD) { 2227 (*linesw[tp->t_line].l_modem) 2228 (tp, com->prev_modem_status & MSR_DCD); 2229 } 2230 } 2231 if (com->state & CS_ODONE) { 2232 com_lock(); 2233 com->state &= ~CS_ODONE; 2234 com_unlock(); 2235 if (!(com->state & CS_BUSY) 2236 && !(com->extra_state & CSE_BUSYCHECK)) { 2237 callout_reset(&com->busy_ch, hz / 100, 2238 siobusycheck, com); 2239 com->extra_state |= CSE_BUSYCHECK; 2240 } 2241 (*linesw[tp->t_line].l_start)(tp); 2242 } 2243 } 2244 if (any) 2245 goto repeat; 2246 lwkt_reltoken(&tty_token); 2247 } 2248 2249 /* 2250 * Called with tty_token held but no com_lock 2251 */ 2252 static int 2253 comparam(struct tty *tp, struct termios *t) 2254 { 2255 u_int cfcr; 2256 int cflag; 2257 struct com_s *com; 2258 u_int divisor; 2259 u_char dlbh; 2260 u_char dlbl; 2261 int unit; 2262 2263 unit = DEV_TO_UNIT(tp->t_dev); 2264 com = com_addr(unit); 2265 if (com == NULL) { 2266 return (ENODEV); 2267 } 2268 2269 /* do historical conversions */ 2270 if (t->c_ispeed == 0) 2271 t->c_ispeed = t->c_ospeed; 2272 2273 /* check requested parameters */ 2274 if (t->c_ospeed == 0) { 2275 divisor = 0; 2276 } else { 2277 if (t->c_ispeed != t->c_ospeed) 2278 return (EINVAL); 2279 divisor = siodivisor(com->rclk, t->c_ispeed); 2280 if (divisor == 0) 2281 return (EINVAL); 2282 } 2283 2284 /* parameters are OK, convert them to the com struct and the device */ 2285 crit_enter(); 2286 if (divisor == 0) 2287 (void)commctl(com, TIOCM_DTR, DMBIC); /* hang up line */ 2288 else 2289 (void)commctl(com, TIOCM_DTR, DMBIS); 2290 cflag = t->c_cflag; 2291 switch (cflag & CSIZE) { 2292 case CS5: 2293 cfcr = CFCR_5BITS; 2294 break; 2295 case CS6: 2296 cfcr = CFCR_6BITS; 2297 break; 2298 case CS7: 2299 cfcr = CFCR_7BITS; 2300 break; 2301 default: 2302 cfcr = CFCR_8BITS; 2303 break; 2304 } 2305 if (cflag & PARENB) { 2306 cfcr |= CFCR_PENAB; 2307 if (!(cflag & PARODD)) 2308 cfcr |= CFCR_PEVEN; 2309 } 2310 if (cflag & CSTOPB) 2311 cfcr |= CFCR_STOPB; 2312 2313 if (com->hasfifo && divisor != 0) { 2314 /* 2315 * Use a fifo trigger level low enough so that the input 2316 * latency from the fifo is less than about 16 msec and 2317 * the total latency is less than about 30 msec. These 2318 * latencies are reasonable for humans. Serial comms 2319 * protocols shouldn't expect anything better since modem 2320 * latencies are larger. 2321 * 2322 * Interrupts can be held up for long periods of time 2323 * due to inefficiencies in other parts of the kernel, 2324 * certain video cards, etc. Setting the FIFO trigger 2325 * point to MEDH instead of HIGH gives us 694uS of slop 2326 * (8 character times) instead of 173uS (2 character times) 2327 * @ 115200 bps. 2328 */ 2329 com->fifo_image = t->c_ospeed <= 4800 2330 ? FIFO_ENABLE : FIFO_ENABLE | FIFO_RX_MEDH; 2331 #ifdef COM_ESP 2332 /* 2333 * The Hayes ESP card needs the fifo DMA mode bit set 2334 * in compatibility mode. If not, it will interrupt 2335 * for each character received. 2336 */ 2337 if (com->esp) 2338 com->fifo_image |= FIFO_DMA_MODE; 2339 #endif 2340 sio_setreg(com, com_fifo, com->fifo_image); 2341 } 2342 2343 /* 2344 * This returns with interrupts disabled so that we can complete 2345 * the speed change atomically. Keeping interrupts disabled is 2346 * especially important while com_data is hidden. 2347 */ 2348 siocntxwait(com->bsh); 2349 (void) siosetwater(com, t->c_ispeed); 2350 2351 if (divisor != 0) { 2352 sio_setreg(com, com_cfcr, cfcr | CFCR_DLAB); 2353 /* 2354 * Only set the divisor registers if they would change, 2355 * since on some 16550 incompatibles (UMC8669F), setting 2356 * them while input is arriving them loses sync until 2357 * data stops arriving. 2358 */ 2359 dlbl = divisor & 0xFF; 2360 if (sio_getreg(com, com_dlbl) != dlbl) 2361 sio_setreg(com, com_dlbl, dlbl); 2362 dlbh = divisor >> 8; 2363 if (sio_getreg(com, com_dlbh) != dlbh) 2364 sio_setreg(com, com_dlbh, dlbh); 2365 } 2366 sio_setreg(com, com_cfcr, com->cfcr_image = cfcr); 2367 2368 if (!(tp->t_state & TS_TTSTOP)) 2369 com->state |= CS_TTGO; 2370 2371 if (cflag & CRTS_IFLOW) { 2372 if (com->st16650a) { 2373 sio_setreg(com, com_cfcr, 0xbf); 2374 sio_setreg(com, com_fifo, 2375 sio_getreg(com, com_fifo) | 0x40); 2376 } 2377 com->state |= CS_RTS_IFLOW; 2378 /* 2379 * If CS_RTS_IFLOW just changed from off to on, the change 2380 * needs to be propagated to MCR_RTS. This isn't urgent, 2381 * so do it later by calling comstart() instead of repeating 2382 * a lot of code from comstart() here. 2383 */ 2384 } else if (com->state & CS_RTS_IFLOW) { 2385 com->state &= ~CS_RTS_IFLOW; 2386 /* 2387 * CS_RTS_IFLOW just changed from on to off. Force MCR_RTS 2388 * on here, since comstart() won't do it later. 2389 */ 2390 outb(com->modem_ctl_port, com->mcr_image |= MCR_RTS); 2391 if (com->st16650a) { 2392 sio_setreg(com, com_cfcr, 0xbf); 2393 sio_setreg(com, com_fifo, 2394 sio_getreg(com, com_fifo) & ~0x40); 2395 } 2396 } 2397 2398 /* 2399 * Set up state to handle output flow control. 2400 * XXX - worth handling MDMBUF (DCD) flow control at the lowest level? 2401 * Now has 10+ msec latency, while CTS flow has 50- usec latency. 2402 */ 2403 com->state |= CS_ODEVREADY; 2404 com->state &= ~CS_CTS_OFLOW; 2405 if (cflag & CCTS_OFLOW) { 2406 com->state |= CS_CTS_OFLOW; 2407 if (!(com->last_modem_status & MSR_CTS)) 2408 com->state &= ~CS_ODEVREADY; 2409 if (com->st16650a) { 2410 sio_setreg(com, com_cfcr, 0xbf); 2411 sio_setreg(com, com_fifo, 2412 sio_getreg(com, com_fifo) | 0x80); 2413 } 2414 } else { 2415 if (com->st16650a) { 2416 sio_setreg(com, com_cfcr, 0xbf); 2417 sio_setreg(com, com_fifo, 2418 sio_getreg(com, com_fifo) & ~0x80); 2419 } 2420 } 2421 2422 sio_setreg(com, com_cfcr, com->cfcr_image); 2423 2424 /* XXX shouldn't call functions while intrs are disabled. */ 2425 disc_optim(tp, t, com); 2426 /* 2427 * Recover from fiddling with CS_TTGO. We used to call siointr1() 2428 * unconditionally, but that defeated the careful discarding of 2429 * stale input in sioopen(). 2430 */ 2431 if (com->state >= (CS_BUSY | CS_TTGO)) { 2432 com_lock(); 2433 siointr1(com); 2434 com_unlock(); 2435 } 2436 crit_exit(); 2437 comstart(tp); 2438 if (com->ibufold != NULL) { 2439 kfree(com->ibufold, M_DEVBUF); 2440 com->ibufold = NULL; 2441 } 2442 return (0); 2443 } 2444 2445 /* 2446 * called with tty_token held 2447 */ 2448 static int 2449 siosetwater(struct com_s *com, speed_t speed) 2450 { 2451 int cp4ticks; 2452 u_char *ibuf; 2453 int ibufsize; 2454 struct tty *tp; 2455 2456 /* 2457 * Make the buffer size large enough to handle a softtty interrupt 2458 * latency of about 2 ticks without loss of throughput or data 2459 * (about 3 ticks if input flow control is not used or not honoured, 2460 * but a bit less for CS5-CS7 modes). 2461 */ 2462 cp4ticks = speed / 10 / hz * 4; 2463 for (ibufsize = 128; ibufsize < cp4ticks;) 2464 ibufsize <<= 1; 2465 if (ibufsize == com->ibufsize) 2466 return (0); 2467 2468 /* 2469 * Allocate input buffer. The extra factor of 2 in the size is 2470 * to allow for an error byte for each input byte. 2471 */ 2472 ibuf = kmalloc(2 * ibufsize, M_DEVBUF, M_WAITOK | M_ZERO); 2473 2474 /* Initialize non-critical variables. */ 2475 com->ibufold = com->ibuf; 2476 com->ibufsize = ibufsize; 2477 tp = com->tp; 2478 if (tp != NULL) { 2479 tp->t_ififosize = 2 * ibufsize; 2480 tp->t_ispeedwat = (speed_t)-1; 2481 tp->t_ospeedwat = (speed_t)-1; 2482 } 2483 2484 /* 2485 * Read current input buffer. 2486 */ 2487 com_lock(); 2488 if (com->iptr != com->ibuf) 2489 sioinput(com); 2490 2491 /*- 2492 * Initialize critical variables, including input buffer watermarks. 2493 * The external device is asked to stop sending when the buffer 2494 * exactly reaches high water, or when the high level requests it. 2495 * The high level is notified immediately (rather than at a later 2496 * clock tick) when this watermark is reached. 2497 * The buffer size is chosen so the watermark should almost never 2498 * be reached. 2499 * The low watermark is invisibly 0 since the buffer is always 2500 * emptied all at once. 2501 */ 2502 com->iptr = com->ibuf = ibuf; 2503 com->ibufend = ibuf + ibufsize; 2504 com->ierroff = ibufsize; 2505 com->ihighwater = ibuf + 3 * ibufsize / 4; 2506 com_unlock(); 2507 return (0); 2508 } 2509 2510 static void 2511 comstart(struct tty *tp) 2512 { 2513 struct com_s *com; 2514 int unit; 2515 2516 lwkt_gettoken(&tty_token); 2517 unit = DEV_TO_UNIT(tp->t_dev); 2518 com = com_addr(unit); 2519 if (com == NULL) { 2520 lwkt_reltoken(&tty_token); 2521 return; 2522 } 2523 crit_enter(); 2524 com_lock(); 2525 if (tp->t_state & TS_TTSTOP) 2526 com->state &= ~CS_TTGO; 2527 else 2528 com->state |= CS_TTGO; 2529 if (tp->t_state & TS_TBLOCK) { 2530 if (com->mcr_image & MCR_RTS && com->state & CS_RTS_IFLOW) 2531 outb(com->modem_ctl_port, com->mcr_image &= ~MCR_RTS); 2532 } else { 2533 if (!(com->mcr_image & MCR_RTS) && com->iptr < com->ihighwater 2534 && com->state & CS_RTS_IFLOW) 2535 outb(com->modem_ctl_port, com->mcr_image |= MCR_RTS); 2536 } 2537 com_unlock(); 2538 if (tp->t_state & (TS_TIMEOUT | TS_TTSTOP)) { 2539 ttwwakeup(tp); 2540 crit_exit(); 2541 lwkt_reltoken(&tty_token); 2542 return; 2543 } 2544 if (tp->t_outq.c_cc != 0) { 2545 struct lbq *qp; 2546 struct lbq *next; 2547 2548 if (!com->obufs[0].l_queued) { 2549 com->obufs[0].l_tail 2550 = com->obuf1 + clist_qtob(&tp->t_outq, com->obuf1, 2551 sizeof com->obuf1); 2552 com->obufs[0].l_next = NULL; 2553 com->obufs[0].l_queued = TRUE; 2554 com_lock(); 2555 if (com->state & CS_BUSY) { 2556 qp = com->obufq.l_next; 2557 while ((next = qp->l_next) != NULL) 2558 qp = next; 2559 qp->l_next = &com->obufs[0]; 2560 } else { 2561 com->obufq.l_head = com->obufs[0].l_head; 2562 com->obufq.l_tail = com->obufs[0].l_tail; 2563 com->obufq.l_next = &com->obufs[0]; 2564 com->state |= CS_BUSY; 2565 } 2566 com_unlock(); 2567 } 2568 if (tp->t_outq.c_cc != 0 && !com->obufs[1].l_queued) { 2569 com->obufs[1].l_tail 2570 = com->obuf2 + clist_qtob(&tp->t_outq, com->obuf2, 2571 sizeof com->obuf2); 2572 com->obufs[1].l_next = NULL; 2573 com->obufs[1].l_queued = TRUE; 2574 com_lock(); 2575 if (com->state & CS_BUSY) { 2576 qp = com->obufq.l_next; 2577 while ((next = qp->l_next) != NULL) 2578 qp = next; 2579 qp->l_next = &com->obufs[1]; 2580 } else { 2581 com->obufq.l_head = com->obufs[1].l_head; 2582 com->obufq.l_tail = com->obufs[1].l_tail; 2583 com->obufq.l_next = &com->obufs[1]; 2584 com->state |= CS_BUSY; 2585 } 2586 com_unlock(); 2587 } 2588 tp->t_state |= TS_BUSY; 2589 } 2590 com_lock(); 2591 if (com->state >= (CS_BUSY | CS_TTGO)) 2592 siointr1(com); /* fake interrupt to start output */ 2593 com_unlock(); 2594 ttwwakeup(tp); 2595 crit_exit(); 2596 lwkt_reltoken(&tty_token); 2597 } 2598 2599 static void 2600 comstop(struct tty *tp, int rw) 2601 { 2602 struct com_s *com; 2603 2604 lwkt_gettoken(&tty_token); 2605 com = com_addr(DEV_TO_UNIT(tp->t_dev)); 2606 if (com == NULL || com->gone) { 2607 lwkt_reltoken(&tty_token); 2608 return; 2609 } 2610 com_lock(); 2611 if (rw & FWRITE) { 2612 if (com->hasfifo) 2613 #ifdef COM_ESP 2614 /* XXX avoid h/w bug. */ 2615 if (!com->esp) 2616 #endif 2617 sio_setreg(com, com_fifo, 2618 FIFO_XMT_RST | com->fifo_image); 2619 com->obufs[0].l_queued = FALSE; 2620 com->obufs[1].l_queued = FALSE; 2621 com->state &= ~(CS_ODONE | CS_BUSY); 2622 com->tp->t_state &= ~TS_BUSY; 2623 } 2624 if (rw & FREAD) { 2625 if (com->hasfifo) 2626 #ifdef COM_ESP 2627 /* XXX avoid h/w bug. */ 2628 if (!com->esp) 2629 #endif 2630 sio_setreg(com, com_fifo, 2631 FIFO_RCV_RST | com->fifo_image); 2632 com->iptr = com->ibuf; 2633 } 2634 com_unlock(); 2635 comstart(tp); 2636 lwkt_reltoken(&tty_token); 2637 } 2638 2639 static int 2640 commctl(struct com_s *com, int bits, int how) 2641 { 2642 int mcr; 2643 int msr; 2644 2645 lwkt_gettoken(&tty_token); 2646 if (how == DMGET) { 2647 bits = TIOCM_LE; /* XXX - always enabled while open */ 2648 mcr = com->mcr_image; 2649 if (mcr & MCR_DTR) 2650 bits |= TIOCM_DTR; 2651 if (mcr & MCR_RTS) 2652 bits |= TIOCM_RTS; 2653 msr = com->prev_modem_status; 2654 if (msr & MSR_CTS) 2655 bits |= TIOCM_CTS; 2656 if (msr & MSR_DCD) 2657 bits |= TIOCM_CD; 2658 if (msr & MSR_DSR) 2659 bits |= TIOCM_DSR; 2660 /* 2661 * XXX - MSR_RI is naturally volatile, and we make MSR_TERI 2662 * more volatile by reading the modem status a lot. Perhaps 2663 * we should latch both bits until the status is read here. 2664 */ 2665 if (msr & (MSR_RI | MSR_TERI)) 2666 bits |= TIOCM_RI; 2667 lwkt_reltoken(&tty_token); 2668 return (bits); 2669 } 2670 mcr = 0; 2671 if (bits & TIOCM_DTR) 2672 mcr |= MCR_DTR; 2673 if (bits & TIOCM_RTS) 2674 mcr |= MCR_RTS; 2675 if (com->gone) { 2676 lwkt_reltoken(&tty_token); 2677 return(0); 2678 } 2679 com_lock(); 2680 switch (how) { 2681 case DMSET: 2682 outb(com->modem_ctl_port, 2683 com->mcr_image = mcr | (com->mcr_image & MCR_IENABLE)); 2684 break; 2685 case DMBIS: 2686 outb(com->modem_ctl_port, com->mcr_image |= mcr); 2687 break; 2688 case DMBIC: 2689 outb(com->modem_ctl_port, com->mcr_image &= ~mcr); 2690 break; 2691 } 2692 com_unlock(); 2693 lwkt_reltoken(&tty_token); 2694 return (0); 2695 } 2696 2697 /* 2698 * NOTE: Must be called with tty_token held 2699 */ 2700 static void 2701 siosettimeout(void) 2702 { 2703 struct com_s *com; 2704 bool_t someopen; 2705 int unit; 2706 2707 ASSERT_LWKT_TOKEN_HELD(&tty_token); 2708 /* 2709 * Set our timeout period to 1 second if no polled devices are open. 2710 * Otherwise set it to max(1/200, 1/hz). 2711 * Enable timeouts iff some device is open. 2712 */ 2713 callout_stop(&sio_timeout_handle); 2714 sio_timeout = hz; 2715 someopen = FALSE; 2716 for (unit = 0; unit < sio_numunits; ++unit) { 2717 com = com_addr(unit); 2718 if (com != NULL && com->tp != NULL 2719 && com->tp->t_state & TS_ISOPEN && !com->gone) { 2720 someopen = TRUE; 2721 if (com->poll || com->poll_output) { 2722 sio_timeout = hz > 200 ? hz / 200 : 1; 2723 break; 2724 } 2725 } 2726 } 2727 if (someopen) { 2728 sio_timeouts_until_log = hz / sio_timeout; 2729 callout_reset(&sio_timeout_handle, sio_timeout, 2730 comwakeup, NULL); 2731 } else { 2732 /* Flush error messages, if any. */ 2733 sio_timeouts_until_log = 1; 2734 comwakeup(NULL); 2735 callout_stop(&sio_timeout_handle); 2736 } 2737 } 2738 2739 /* 2740 * NOTE: Must be called with tty_token held 2741 */ 2742 static void 2743 comwakeup(void *chan) 2744 { 2745 struct com_s *com; 2746 int unit; 2747 2748 /* 2749 * Can be called from a callout too so just get the token 2750 */ 2751 lwkt_gettoken(&tty_token); 2752 callout_reset(&sio_timeout_handle, sio_timeout, comwakeup, NULL); 2753 2754 /* 2755 * Recover from lost output interrupts. 2756 * Poll any lines that don't use interrupts. 2757 */ 2758 for (unit = 0; unit < sio_numunits; ++unit) { 2759 com = com_addr(unit); 2760 if (com != NULL && !com->gone 2761 && (com->state >= (CS_BUSY | CS_TTGO) || com->poll)) { 2762 com_lock(); 2763 siointr1(com); 2764 com_unlock(); 2765 } 2766 } 2767 2768 /* 2769 * Check for and log errors, but not too often. 2770 */ 2771 if (--sio_timeouts_until_log > 0) { 2772 lwkt_reltoken(&tty_token); 2773 return; 2774 } 2775 sio_timeouts_until_log = hz / sio_timeout; 2776 for (unit = 0; unit < sio_numunits; ++unit) { 2777 int errnum; 2778 2779 com = com_addr(unit); 2780 if (com == NULL) 2781 continue; 2782 if (com->gone) 2783 continue; 2784 for (errnum = 0; errnum < CE_NTYPES; ++errnum) { 2785 u_int delta; 2786 u_long total; 2787 2788 com_lock(); 2789 delta = com->delta_error_counts[errnum]; 2790 com->delta_error_counts[errnum] = 0; 2791 com_unlock(); 2792 if (delta == 0) 2793 continue; 2794 total = com->error_counts[errnum] += delta; 2795 log(LOG_ERR, "sio%d: %u more %s%s (total %lu)\n", 2796 unit, delta, error_desc[errnum], 2797 delta == 1 ? "" : "s", total); 2798 } 2799 } 2800 lwkt_reltoken(&tty_token); 2801 } 2802 2803 static void 2804 disc_optim(struct tty *tp, struct termios *t, struct com_s *com) 2805 { 2806 lwkt_gettoken(&tty_token); 2807 if (!(t->c_iflag & (ICRNL | IGNCR | IMAXBEL | INLCR | ISTRIP | IXON)) 2808 && (!(t->c_iflag & BRKINT) || (t->c_iflag & IGNBRK)) 2809 && (!(t->c_iflag & PARMRK) 2810 || (t->c_iflag & (IGNPAR | IGNBRK)) == (IGNPAR | IGNBRK)) 2811 && !(t->c_lflag & (ECHO | ICANON | IEXTEN | ISIG | PENDIN)) 2812 && linesw[tp->t_line].l_rint == ttyinput) 2813 tp->t_state |= TS_CAN_BYPASS_L_RINT; 2814 else 2815 tp->t_state &= ~TS_CAN_BYPASS_L_RINT; 2816 com->hotchar = linesw[tp->t_line].l_hotchar; 2817 lwkt_reltoken(&tty_token); 2818 } 2819 2820 /* 2821 * Following are all routines needed for SIO to act as console 2822 */ 2823 #include <sys/cons.h> 2824 2825 struct siocnstate { 2826 u_char dlbl; 2827 u_char dlbh; 2828 u_char ier; 2829 u_char cfcr; 2830 u_char mcr; 2831 }; 2832 2833 static speed_t siocngetspeed (Port_t, u_long rclk); 2834 #if 0 2835 static void siocnclose (struct siocnstate *sp, Port_t iobase); 2836 #endif 2837 static void siocnopen (struct siocnstate *sp, Port_t iobase, int speed); 2838 2839 static cn_probe_t siocnprobe; 2840 static cn_init_t siocninit; 2841 static cn_init_fini_t siocninit_fini; 2842 static cn_checkc_t siocncheckc; 2843 static cn_getc_t siocngetc; 2844 static cn_putc_t siocnputc; 2845 2846 #if defined(__i386__) || defined(__x86_64__) 2847 CONS_DRIVER(sio, siocnprobe, siocninit, siocninit_fini, 2848 NULL, siocngetc, siocncheckc, siocnputc, NULL, NULL); 2849 #endif 2850 2851 /* To get the GDB related variables */ 2852 #if defined(DDB) 2853 #include <ddb/ddb.h> 2854 #endif 2855 2856 static void 2857 siocntxwait(Port_t iobase) 2858 { 2859 int timo; 2860 2861 /* 2862 * Wait for any pending transmission to finish. Required to avoid 2863 * the UART lockup bug when the speed is changed, and for normal 2864 * transmits. 2865 */ 2866 timo = 100000; 2867 while ((inb(iobase + com_lsr) & (LSR_TSRE | LSR_TXRDY)) 2868 != (LSR_TSRE | LSR_TXRDY) && --timo != 0) 2869 ; 2870 } 2871 2872 /* 2873 * Read the serial port specified and try to figure out what speed 2874 * it's currently running at. We're assuming the serial port has 2875 * been initialized and is basicly idle. This routine is only intended 2876 * to be run at system startup. 2877 * 2878 * If the value read from the serial port doesn't make sense, return 0. 2879 */ 2880 /* 2881 * NOTE: Must be called with tty_token held 2882 */ 2883 static speed_t 2884 siocngetspeed(Port_t iobase, u_long rclk) 2885 { 2886 u_int divisor; 2887 u_char dlbh; 2888 u_char dlbl; 2889 u_char cfcr; 2890 2891 cfcr = inb(iobase + com_cfcr); 2892 outb(iobase + com_cfcr, CFCR_DLAB | cfcr); 2893 2894 dlbl = inb(iobase + com_dlbl); 2895 dlbh = inb(iobase + com_dlbh); 2896 2897 outb(iobase + com_cfcr, cfcr); 2898 2899 divisor = dlbh << 8 | dlbl; 2900 2901 /* XXX there should be more sanity checking. */ 2902 if (divisor == 0) 2903 return (CONSPEED); 2904 return (rclk / (16UL * divisor)); 2905 } 2906 2907 static void 2908 siocnopen(struct siocnstate *sp, Port_t iobase, int speed) 2909 { 2910 u_int divisor; 2911 u_char dlbh; 2912 u_char dlbl; 2913 2914 /* 2915 * Save all the device control registers except the fifo register 2916 * and set our default ones (cs8 -parenb speed=comdefaultrate). 2917 * We can't save the fifo register since it is read-only. 2918 */ 2919 sp->ier = inb(iobase + com_ier); 2920 outb(iobase + com_ier, 0); /* spltty() doesn't stop siointr() */ 2921 siocntxwait(iobase); 2922 sp->cfcr = inb(iobase + com_cfcr); 2923 outb(iobase + com_cfcr, CFCR_DLAB | CFCR_8BITS); 2924 sp->dlbl = inb(iobase + com_dlbl); 2925 sp->dlbh = inb(iobase + com_dlbh); 2926 /* 2927 * Only set the divisor registers if they would change, since on 2928 * some 16550 incompatibles (Startech), setting them clears the 2929 * data input register. This also reduces the effects of the 2930 * UMC8669F bug. 2931 */ 2932 divisor = siodivisor(comdefaultrclk, speed); 2933 dlbl = divisor & 0xFF; 2934 if (sp->dlbl != dlbl) 2935 outb(iobase + com_dlbl, dlbl); 2936 dlbh = divisor >> 8; 2937 if (sp->dlbh != dlbh) 2938 outb(iobase + com_dlbh, dlbh); 2939 outb(iobase + com_cfcr, CFCR_8BITS); 2940 sp->mcr = inb(iobase + com_mcr); 2941 /* 2942 * We don't want interrupts, but must be careful not to "disable" 2943 * them by clearing the MCR_IENABLE bit, since that might cause 2944 * an interrupt by floating the IRQ line. 2945 */ 2946 outb(iobase + com_mcr, (sp->mcr & MCR_IENABLE) | MCR_DTR | MCR_RTS); 2947 } 2948 2949 #if 0 2950 static void 2951 siocnclose(struct siocnstate *sp, Port_t iobase) 2952 { 2953 /* 2954 * Restore the device control registers. 2955 */ 2956 siocntxwait(iobase); 2957 outb(iobase + com_cfcr, CFCR_DLAB | CFCR_8BITS); 2958 if (sp->dlbl != inb(iobase + com_dlbl)) 2959 outb(iobase + com_dlbl, sp->dlbl); 2960 if (sp->dlbh != inb(iobase + com_dlbh)) 2961 outb(iobase + com_dlbh, sp->dlbh); 2962 outb(iobase + com_cfcr, sp->cfcr); 2963 /* 2964 * XXX damp oscillations of MCR_DTR and MCR_RTS by not restoring them. 2965 */ 2966 outb(iobase + com_mcr, sp->mcr | MCR_DTR | MCR_RTS); 2967 outb(iobase + com_ier, sp->ier); 2968 } 2969 #endif 2970 2971 static void 2972 siocnprobe(struct consdev *cp) 2973 { 2974 u_char cfcr; 2975 u_int divisor; 2976 int unit; 2977 int fn; 2978 struct siocnstate sp; 2979 2980 /* 2981 * Find our first enabled console, if any. If it is a high-level 2982 * console device, then initialize it and return successfully. 2983 * If it is a low-level console device, then initialize it and 2984 * return unsuccessfully. It must be initialized in both cases 2985 * for early use by console drivers and debuggers. Initializing 2986 * the hardware is not necessary in all cases, since the i/o 2987 * routines initialize it on the fly, but it is necessary if 2988 * input might arrive while the hardware is switched back to an 2989 * uninitialized state. We can't handle multiple console devices 2990 * yet because our low-level routines don't take a device arg. 2991 * We trust the user to set the console flags properly so that we 2992 * don't need to probe. 2993 */ 2994 cp->cn_pri = CN_DEAD; 2995 2996 for (unit = 0; unit < 16; unit++) { /* XXX need to know how many */ 2997 int flags; 2998 int disabled; 2999 3000 if (!resource_int_value("sio", unit, "disabled", &disabled)) { 3001 if (disabled) 3002 continue; 3003 } 3004 if (resource_int_value("sio", unit, "flags", &flags)) 3005 continue; 3006 if (COM_CONSOLE(flags) || COM_DEBUGGER(flags)) { 3007 int port; 3008 int baud; 3009 Port_t iobase; 3010 speed_t boot_speed; 3011 struct com_s *com; 3012 3013 /* 3014 * We need the port. For built-in serial ports 3015 * (e.g. sio0/sio1) the resources exist. For 3016 * add-on serial ports they resources might not 3017 * but the port may have been configured late 3018 * and we can find it when we re-probe. 3019 * 3020 * If the port is not specified check to see if 3021 * the device configured after the fact. 3022 */ 3023 com = com_addr(unit); 3024 if (resource_int_value("sio", unit, "port", &port)) { 3025 if (com == NULL || com->ioportres == NULL) 3026 continue; 3027 port = rman_get_bushandle(com->ioportres); 3028 } 3029 if (resource_int_value("sio", unit, "baud", &baud) == 0) 3030 boot_speed = baud; 3031 else 3032 boot_speed = 0; 3033 iobase = port; 3034 crit_enter(); 3035 if (boothowto & RB_SERIAL) { 3036 if (boot_speed == 0) { 3037 boot_speed = siocngetspeed(iobase, 3038 comdefaultrclk); 3039 } 3040 if (boot_speed) 3041 comdefaultrate = boot_speed; 3042 } 3043 if (boot_speed == 0) 3044 boot_speed = comdefaultrate; 3045 3046 /* 3047 * Initialize the divisor latch. We can't rely on 3048 * siocnopen() to do this the first time, since it 3049 * avoids writing to the latch if the latch appears 3050 * to have the correct value. Also, if we didn't 3051 * just read the speed from the hardware, then we 3052 * need to set the speed in hardware so that 3053 * switching it later is null. 3054 */ 3055 com_lock(); 3056 cfcr = inb(iobase + com_cfcr); 3057 outb(iobase + com_cfcr, CFCR_DLAB | cfcr); 3058 divisor = siodivisor(comdefaultrclk, boot_speed); 3059 outb(iobase + com_dlbl, divisor & 0xff); 3060 outb(iobase + com_dlbh, divisor >> 8); 3061 outb(iobase + com_cfcr, cfcr); 3062 3063 /* 3064 * Make sure we can drain the receiver. If we can't, 3065 * the serial port may not exist and making it the 3066 * console will implode the kernel. 3067 * 3068 * This is a failsafe, the main sio probe should have 3069 * already forced sioN.disabled to 1 and not reached 3070 * here. 3071 */ 3072 for (fn = 0; fn < 256; ++fn) { 3073 if ((inb(iobase + com_lsr) & LSR_RXRDY) == 0) 3074 break; 3075 (void)inb(iobase + com_data); 3076 } 3077 if (fn == 256) { 3078 kprintf("sio%d: does not exist, " 3079 "cannot make console\n", unit); 3080 com_unlock(); 3081 crit_exit(); 3082 continue; 3083 } 3084 3085 /* 3086 * We want ttyopen 3087 */ 3088 if (com) { 3089 com->it_in.c_iflag = TTYDEF_IFLAG; 3090 com->it_in.c_oflag = TTYDEF_OFLAG; 3091 com->it_in.c_cflag = TTYDEF_CFLAG | CLOCAL; 3092 com->it_in.c_lflag = TTYDEF_LFLAG; 3093 com->lt_out.c_cflag = com->lt_in.c_cflag = CLOCAL; 3094 com->lt_out.c_ispeed = com->lt_out.c_ospeed = 3095 com->lt_in.c_ispeed = com->lt_in.c_ospeed = 3096 com->it_in.c_ispeed = com->it_in.c_ospeed = 3097 boot_speed; 3098 } 3099 3100 siocnopen(&sp, iobase, boot_speed); 3101 com_unlock(); 3102 3103 crit_exit(); 3104 if (COM_CONSOLE(flags) && !COM_LLCONSOLE(flags)) { 3105 cp->cn_probegood = 1; 3106 cp->cn_private = (void *)(intptr_t)unit; 3107 cp->cn_pri = (COM_FORCECONSOLE(flags) 3108 || ((boothowto & RB_SERIAL)) ? 3109 CN_REMOTE : CN_NORMAL); 3110 siocniobase = iobase; 3111 siocnunit = unit; 3112 } 3113 if (COM_DEBUGGER(flags) && gdb_tab == NULL) { 3114 kprintf("sio%d: gdb debugging port\n", unit); 3115 siogdbiobase = iobase; 3116 siogdbunit = unit; 3117 #if defined(DDB) 3118 cp->cn_gdbprivate = (void *)(intptr_t)unit; 3119 gdb_tab = cp; 3120 #endif 3121 } 3122 } 3123 } 3124 #if defined(__i386__) || defined(__x86_64__) 3125 #if defined(DDB) 3126 /* 3127 * XXX Ugly Compatibility. 3128 * If no gdb port has been specified, set it to be the console 3129 * as some configuration files don't specify the gdb port. 3130 */ 3131 if (gdb_tab == NULL && (boothowto & RB_GDB)) { 3132 kprintf("Warning: no GDB port specified. Defaulting to sio%d.\n", 3133 siocnunit); 3134 kprintf("Set flag 0x80 on desired GDB port in your\n"); 3135 kprintf("configuration file (currently sio only).\n"); 3136 siogdbiobase = siocniobase; 3137 siogdbunit = siocnunit; 3138 cp->cn_gdbprivate = (void *)(intptr_t)siocnunit; 3139 gdb_tab = cp; 3140 } 3141 #endif 3142 #endif 3143 } 3144 3145 static void 3146 siocninit(struct consdev *cp) 3147 { 3148 comconsole = (int)(intptr_t)cp->cn_private; 3149 } 3150 3151 static void 3152 siocninit_fini(struct consdev *cp) 3153 { 3154 cdev_t dev; 3155 char tbuf[MAKEDEV_MINNBUF]; 3156 int unit; 3157 3158 if (cp->cn_probegood) { 3159 unit = (int)(intptr_t)cp->cn_private; 3160 3161 /* 3162 * Call devfs_find_device_by_name on ttydX to find the correct 3163 * device, as it should have been created already at this 3164 * point by the attach routine. 3165 * 3166 * If it isn't found, the serial port was not attached at all 3167 * and we shouldn't be here, so assert this case. 3168 */ 3169 dev = devfs_find_device_by_name("ttyd%s", 3170 makedev_unit_b32(tbuf, unit)); 3171 3172 KKASSERT(dev != NULL); 3173 cp->cn_dev = dev; 3174 } 3175 } 3176 3177 static int 3178 siocncheckc(void *private) 3179 { 3180 int c; 3181 int unit = (int)(intptr_t)private; 3182 Port_t iobase; 3183 #if 0 3184 struct siocnstate sp; 3185 #endif 3186 3187 if (unit == siogdbunit) 3188 iobase = siogdbiobase; 3189 else 3190 iobase = siocniobase; 3191 crit_enter(); 3192 com_lock(); 3193 #if 0 3194 siocnopen(&sp, iobase, comdefaultrate); 3195 #endif 3196 if (inb(iobase + com_lsr) & LSR_RXRDY) 3197 c = inb(iobase + com_data); 3198 else 3199 c = -1; 3200 #if 0 3201 siocnclose(&sp, iobase); 3202 #endif 3203 com_unlock(); 3204 crit_exit(); 3205 3206 return (c); 3207 } 3208 3209 3210 static int 3211 siocngetc(void *private) 3212 { 3213 int c; 3214 int unit = (int)(intptr_t)private; 3215 Port_t iobase; 3216 #if 0 3217 struct siocnstate sp; 3218 #endif 3219 3220 if (unit == siogdbunit) 3221 iobase = siogdbiobase; 3222 else 3223 iobase = siocniobase; 3224 crit_enter(); 3225 com_lock(); 3226 #if 0 3227 siocnopen(&sp, iobase, comdefaultrate); 3228 #endif 3229 while (!(inb(iobase + com_lsr) & LSR_RXRDY)) 3230 ; 3231 c = inb(iobase + com_data); 3232 #if 0 3233 siocnclose(&sp, iobase); 3234 #endif 3235 com_unlock(); 3236 crit_exit(); 3237 return (c); 3238 } 3239 3240 static void 3241 siocnputc(void *private, int c) 3242 { 3243 int unit = (int)(intptr_t)private; 3244 #if 0 3245 struct siocnstate sp; 3246 #endif 3247 Port_t iobase; 3248 3249 if (unit == siogdbunit) 3250 iobase = siogdbiobase; 3251 else 3252 iobase = siocniobase; 3253 crit_enter(); 3254 com_lock(); 3255 #if 0 3256 siocnopen(&sp, iobase, comdefaultrate); 3257 #endif 3258 siocntxwait(iobase); 3259 outb(iobase + com_data, c); 3260 #if 0 3261 siocnclose(&sp, iobase); 3262 #endif 3263 com_unlock(); 3264 crit_exit(); 3265 } 3266 3267 DRIVER_MODULE(sio, isa, sio_isa_driver, sio_devclass, NULL, NULL); 3268 DRIVER_MODULE(sio, acpi, sio_isa_driver, sio_devclass, NULL, NULL); 3269 #if NPCI > 0 3270 DRIVER_MODULE(sio, pci, sio_pci_driver, sio_devclass, NULL, NULL); 3271 #endif 3272 #if NPUC > 0 3273 DRIVER_MODULE(sio, puc, sio_puc_driver, sio_devclass, NULL, NULL); 3274 #endif 3275