1 /*- 2 * (MPSAFE) 3 * 4 * Copyright (c) 1991 The Regents of the University of California. 5 * All rights reserved. 6 * 7 * Redistribution and use in source and binary forms, with or without 8 * modification, are permitted provided that the following conditions 9 * are met: 10 * 1. Redistributions of source code must retain the above copyright 11 * notice, this list of conditions and the following disclaimer. 12 * 2. Redistributions in binary form must reproduce the above copyright 13 * notice, this list of conditions and the following disclaimer in the 14 * documentation and/or other materials provided with the distribution. 15 * 3. Neither the name of the University nor the names of its contributors 16 * may be used to endorse or promote products derived from this software 17 * without specific prior written permission. 18 * 19 * THIS SOFTWARE IS PROVIDED BY THE REGENTS AND CONTRIBUTORS ``AS IS'' AND 20 * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE 21 * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE 22 * ARE DISCLAIMED. IN NO EVENT SHALL THE REGENTS OR CONTRIBUTORS BE LIABLE 23 * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL 24 * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS 25 * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) 26 * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT 27 * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY 28 * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF 29 * SUCH DAMAGE. 30 * 31 * $FreeBSD: src/sys/isa/sio.c,v 1.291.2.35 2003/05/18 08:51:15 murray Exp $ 32 * from: @(#)com.c 7.5 (Berkeley) 5/16/91 33 * from: i386/isa sio.c,v 1.234 34 */ 35 36 #include "opt_comconsole.h" 37 #include "opt_ddb.h" 38 #include "opt_sio.h" 39 #include "use_pci.h" 40 #include "use_puc.h" 41 42 /* 43 * Serial driver, based on 386BSD-0.1 com driver. 44 * Mostly rewritten to use pseudo-DMA. 45 * Works for National Semiconductor NS8250-NS16550AF UARTs. 46 * COM driver, based on HP dca driver. 47 * 48 * Changes for PC-Card integration: 49 * - Added PC-Card driver table and handlers 50 */ 51 #include <sys/param.h> 52 #include <sys/systm.h> 53 #include <sys/reboot.h> 54 #include <sys/malloc.h> 55 #include <sys/tty.h> 56 #include <sys/ttydefaults.h> /* for TTYDEF_* */ 57 #include <sys/proc.h> 58 #include <sys/priv.h> 59 #include <sys/module.h> 60 #include <sys/conf.h> 61 #include <sys/dkstat.h> 62 #include <sys/fcntl.h> 63 #include <sys/interrupt.h> 64 #include <sys/kernel.h> 65 #include <sys/syslog.h> 66 #include <sys/sysctl.h> 67 #include <sys/bus.h> 68 #include <sys/rman.h> 69 #include <sys/timepps.h> 70 #include <sys/thread2.h> 71 #include <sys/devfs.h> 72 #include <sys/consio.h> 73 74 #include <machine/limits.h> 75 76 #include <bus/isa/isareg.h> 77 #include <bus/isa/isavar.h> 78 #if NPCI > 0 79 #include <bus/pci/pcireg.h> 80 #include <bus/pci/pcivar.h> 81 #endif 82 #if NPUC > 0 83 #include <dev/misc/puc/pucvar.h> 84 #endif 85 #include <machine/lock.h> 86 87 #include <machine/clock.h> 88 89 #include "sioreg.h" 90 #include "sio_private.h" 91 92 #ifdef COM_ESP 93 #include "../ic_layer/esp.h" 94 #endif 95 96 #define LOTS_OF_EVENTS 64 /* helps separate urgent events from input */ 97 98 #define CALLOUT_MASK 0x80 99 #define CONTROL_MASK 0x60 100 #define CONTROL_INIT_STATE 0x20 101 #define CONTROL_LOCK_STATE 0x40 102 #define DEV_TO_UNIT(dev) (MINOR_TO_UNIT(minor(dev))) 103 #define MINOR_TO_UNIT(mynor) ((((mynor) & ~0xffffU) >> (8 + 3)) \ 104 | ((mynor) & 0x1f)) 105 #define UNIT_TO_MINOR(unit) ((((unit) & ~0x1fU) << (8 + 3)) \ 106 | ((unit) & 0x1f)) 107 108 #define com_scr 7 /* scratch register for 16450-16550 (R/W) */ 109 110 #define sio_getreg(com, off) \ 111 (bus_space_read_1((com)->bst, (com)->bsh, (off))) 112 #define sio_setreg(com, off, value) \ 113 (bus_space_write_1((com)->bst, (com)->bsh, (off), (value))) 114 115 /* 116 * com state bits. 117 * (CS_BUSY | CS_TTGO) and (CS_BUSY | CS_TTGO | CS_ODEVREADY) must be higher 118 * than the other bits so that they can be tested as a group without masking 119 * off the low bits. 120 * 121 * The following com and tty flags correspond closely: 122 * CS_BUSY = TS_BUSY (maintained by comstart(), siopoll() and 123 * comstop()) 124 * CS_TTGO = ~TS_TTSTOP (maintained by comparam() and comstart()) 125 * CS_CTS_OFLOW = CCTS_OFLOW (maintained by comparam()) 126 * CS_RTS_IFLOW = CRTS_IFLOW (maintained by comparam()) 127 * TS_FLUSH is not used. 128 * XXX I think TIOCSETA doesn't clear TS_TTSTOP when it clears IXON. 129 * XXX CS_*FLOW should be CF_*FLOW in com->flags (control flags not state). 130 */ 131 #define CS_BUSY 0x80 /* output in progress */ 132 #define CS_TTGO 0x40 /* output not stopped by XOFF */ 133 #define CS_ODEVREADY 0x20 /* external device h/w ready (CTS) */ 134 #define CS_CHECKMSR 1 /* check of MSR scheduled */ 135 #define CS_CTS_OFLOW 2 /* use CTS output flow control */ 136 #define CS_DTR_OFF 0x10 /* DTR held off */ 137 #define CS_ODONE 4 /* output completed */ 138 #define CS_RTS_IFLOW 8 /* use RTS input flow control */ 139 #define CSE_BUSYCHECK 1 /* siobusycheck() scheduled */ 140 141 static char const * const error_desc[] = { 142 #define CE_OVERRUN 0 143 "silo overflow", 144 #define CE_INTERRUPT_BUF_OVERFLOW 1 145 "interrupt-level buffer overflow", 146 #define CE_TTY_BUF_OVERFLOW 2 147 "tty-level buffer overflow", 148 }; 149 150 #ifdef COM_ESP 151 static int espattach (struct com_s *com, Port_t esp_port); 152 #endif 153 static int sio_isa_attach (device_t dev); 154 155 static timeout_t siobusycheck; 156 static u_int siodivisor (u_long rclk, speed_t speed); 157 static timeout_t siodtrwakeup; 158 static void comhardclose (struct com_s *com); 159 static void sioinput (struct com_s *com); 160 static void siointr1 (struct com_s *com); 161 static void siointr (void *arg); 162 static int commctl (struct com_s *com, int bits, int how); 163 static int comparam (struct tty *tp, struct termios *t); 164 static inthand2_t siopoll; 165 static int sio_isa_probe (device_t dev); 166 static void siosettimeout (void); 167 static int siosetwater (struct com_s *com, speed_t speed); 168 static void comstart (struct tty *tp); 169 static void comstop (struct tty *tp, int rw); 170 static timeout_t comwakeup; 171 static void disc_optim (struct tty *tp, struct termios *t, 172 struct com_s *com); 173 static void siocntxwait (Port_t iobase); 174 175 #if NPCI > 0 176 static int sio_pci_attach (device_t dev); 177 static void sio_pci_kludge_unit (device_t dev); 178 static int sio_pci_probe (device_t dev); 179 #endif /* NPCI > 0 */ 180 181 #if NPUC > 0 182 static int sio_puc_attach (device_t dev); 183 static int sio_puc_probe (device_t dev); 184 #endif /* NPUC > 0 */ 185 186 static char driver_name[] = "sio"; 187 188 /* table and macro for fast conversion from a unit number to its com struct */ 189 devclass_t sio_devclass; 190 #define com_addr(unit) ((struct com_s *) \ 191 devclass_get_softc(sio_devclass, unit)) 192 193 static device_method_t sio_isa_methods[] = { 194 /* Device interface */ 195 DEVMETHOD(device_probe, sio_isa_probe), 196 DEVMETHOD(device_attach, sio_isa_attach), 197 198 DEVMETHOD_END 199 }; 200 201 static driver_t sio_isa_driver = { 202 driver_name, 203 sio_isa_methods, 204 sizeof(struct com_s), 205 }; 206 207 #if NPCI > 0 208 static device_method_t sio_pci_methods[] = { 209 /* Device interface */ 210 DEVMETHOD(device_probe, sio_pci_probe), 211 DEVMETHOD(device_attach, sio_pci_attach), 212 213 DEVMETHOD_END 214 }; 215 216 static driver_t sio_pci_driver = { 217 driver_name, 218 sio_pci_methods, 219 sizeof(struct com_s), 220 }; 221 #endif /* NPCI > 0 */ 222 223 #if NPUC > 0 224 static device_method_t sio_puc_methods[] = { 225 /* Device interface */ 226 DEVMETHOD(device_probe, sio_puc_probe), 227 DEVMETHOD(device_attach, sio_puc_attach), 228 229 DEVMETHOD_END 230 }; 231 232 static driver_t sio_puc_driver = { 233 driver_name, 234 sio_puc_methods, 235 sizeof(struct com_s), 236 }; 237 #endif /* NPUC > 0 */ 238 239 static d_open_t sioopen; 240 static d_close_t sioclose; 241 static d_read_t sioread; 242 static d_write_t siowrite; 243 static d_ioctl_t sioioctl; 244 245 static struct dev_ops sio_ops = { 246 { driver_name, 0, D_TTY }, 247 .d_open = sioopen, 248 .d_close = sioclose, 249 .d_read = sioread, 250 .d_write = siowrite, 251 .d_ioctl = sioioctl, 252 .d_kqfilter = ttykqfilter, 253 .d_revoke = ttyrevoke 254 }; 255 256 int comconsole = -1; 257 static volatile speed_t comdefaultrate = CONSPEED; 258 static u_long comdefaultrclk = DEFAULT_RCLK; 259 SYSCTL_ULONG(_machdep, OID_AUTO, conrclk, CTLFLAG_RW, &comdefaultrclk, 0, ""); 260 static 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 && priv_check_cred(ap->a_cred, PRIV_ROOT, 0)) { 1325 error = EBUSY; 1326 goto out; 1327 } 1328 } else { 1329 /* 1330 * The device isn't open, so there are no conflicts. 1331 * Initialize it. Initialization is done twice in many 1332 * cases: to preempt sleeping callin opens if we are 1333 * callout, and to complete a callin open after DCD rises. 1334 */ 1335 tp->t_oproc = comstart; 1336 tp->t_param = comparam; 1337 tp->t_stop = comstop; 1338 tp->t_dev = dev; 1339 tp->t_termios = mynor & CALLOUT_MASK 1340 ? com->it_out : com->it_in; 1341 (void)commctl(com, TIOCM_DTR | TIOCM_RTS, DMSET); 1342 com->poll = com->no_irq; 1343 com->poll_output = com->loses_outints; 1344 ++com->wopeners; 1345 error = comparam(tp, &tp->t_termios); 1346 --com->wopeners; 1347 if (error != 0) 1348 goto out; 1349 /* 1350 * XXX we should goto open_top if comparam() slept. 1351 */ 1352 if (com->hasfifo) { 1353 /* 1354 * (Re)enable and drain fifos. 1355 * 1356 * Certain SMC chips cause problems if the fifos 1357 * are enabled while input is ready. Turn off the 1358 * fifo if necessary to clear the input. We test 1359 * the input ready bit after enabling the fifos 1360 * since we've already enabled them in comparam() 1361 * and to handle races between enabling and fresh 1362 * input. 1363 */ 1364 while (TRUE) { 1365 sio_setreg(com, com_fifo, 1366 FIFO_RCV_RST | FIFO_XMT_RST 1367 | com->fifo_image); 1368 /* 1369 * XXX the delays are for superstitious 1370 * historical reasons. It must be less than 1371 * the character time at the maximum 1372 * supported speed (87 usec at 115200 bps 1373 * 8N1). Otherwise we might loop endlessly 1374 * if data is streaming in. We used to use 1375 * delays of 100. That usually worked 1376 * because DELAY(100) used to usually delay 1377 * for about 85 usec instead of 100. 1378 */ 1379 DELAY(50); 1380 if (!(inb(com->line_status_port) & LSR_RXRDY)) 1381 break; 1382 sio_setreg(com, com_fifo, 0); 1383 DELAY(50); 1384 (void) inb(com->data_port); 1385 } 1386 } 1387 1388 com_lock(); 1389 (void) inb(com->line_status_port); 1390 (void) inb(com->data_port); 1391 com->prev_modem_status = com->last_modem_status 1392 = inb(com->modem_status_port); 1393 if (COM_IIR_TXRDYBUG(com->flags)) { 1394 outb(com->intr_ctl_port, IER_ERXRDY | IER_ERLS 1395 | IER_EMSC); 1396 } else { 1397 outb(com->intr_ctl_port, IER_ERXRDY | IER_ETXRDY 1398 | IER_ERLS | IER_EMSC); 1399 } 1400 com_unlock(); 1401 /* 1402 * Handle initial DCD. Callout devices get a fake initial 1403 * DCD (trapdoor DCD). If we are callout, then any sleeping 1404 * callin opens get woken up and resume sleeping on "siobi" 1405 * instead of "siodcd". 1406 */ 1407 /* 1408 * XXX `mynor & CALLOUT_MASK' should be 1409 * `tp->t_cflag & (SOFT_CARRIER | TRAPDOOR_CARRIER) where 1410 * TRAPDOOR_CARRIER is the default initial state for callout 1411 * devices and SOFT_CARRIER is like CLOCAL except it hides 1412 * the true carrier. 1413 */ 1414 if (com->prev_modem_status & MSR_DCD || mynor & CALLOUT_MASK) 1415 (*linesw[tp->t_line].l_modem)(tp, 1); 1416 } 1417 /* 1418 * Wait for DCD if necessary. 1419 */ 1420 if (!(tp->t_state & TS_CARR_ON) && !(mynor & CALLOUT_MASK) 1421 && !(tp->t_cflag & CLOCAL) && !(ap->a_oflags & O_NONBLOCK)) { 1422 ++com->wopeners; 1423 error = tsleep(TSA_CARR_ON(tp), PCATCH, "siodcd", 0); 1424 if (com_addr(unit) == NULL) { 1425 crit_exit(); 1426 lwkt_reltoken(&tty_token); 1427 return (ENXIO); 1428 } 1429 --com->wopeners; 1430 if (error != 0 || com->gone) 1431 goto out; 1432 goto open_top; 1433 } 1434 error = (*linesw[tp->t_line].l_open)(dev, tp); 1435 disc_optim(tp, &tp->t_termios, com); 1436 if (tp->t_state & TS_ISOPEN && mynor & CALLOUT_MASK) 1437 com->active_out = TRUE; 1438 siosettimeout(); 1439 out: 1440 crit_exit(); 1441 if (!(tp->t_state & TS_ISOPEN) && com->wopeners == 0) 1442 comhardclose(com); 1443 lwkt_reltoken(&tty_token); 1444 return (error); 1445 } 1446 1447 static int 1448 sioclose(struct dev_close_args *ap) 1449 { 1450 cdev_t dev = ap->a_head.a_dev; 1451 struct com_s *com; 1452 int mynor; 1453 struct tty *tp; 1454 1455 mynor = minor(dev); 1456 if (mynor & CONTROL_MASK) 1457 return (0); 1458 lwkt_gettoken(&tty_token); 1459 com = com_addr(MINOR_TO_UNIT(mynor)); 1460 if (com == NULL) { 1461 lwkt_reltoken(&tty_token); 1462 return (ENODEV); 1463 } 1464 tp = com->tp; 1465 crit_enter(); 1466 (*linesw[tp->t_line].l_close)(tp, ap->a_fflag); 1467 disc_optim(tp, &tp->t_termios, com); 1468 comstop(tp, FREAD | FWRITE); 1469 comhardclose(com); 1470 ttyclose(tp); 1471 siosettimeout(); 1472 crit_exit(); 1473 if (com->gone) { 1474 kprintf("sio%d: gone\n", com->unit); 1475 crit_enter(); 1476 if (com->ibuf != NULL) 1477 kfree(com->ibuf, M_DEVBUF); 1478 bzero(tp, sizeof *tp); 1479 crit_exit(); 1480 } 1481 lwkt_reltoken(&tty_token); 1482 return (0); 1483 } 1484 1485 static void 1486 comhardclose(struct com_s *com) 1487 { 1488 struct tty *tp; 1489 crit_enter(); 1490 lwkt_gettoken(&tty_token); 1491 com->poll = FALSE; 1492 com->poll_output = FALSE; 1493 com->do_timestamp = FALSE; 1494 com->do_dcd_timestamp = FALSE; 1495 com->pps.ppsparam.mode = 0; 1496 sio_setreg(com, com_cfcr, com->cfcr_image &= ~CFCR_SBREAK); 1497 tp = com->tp; 1498 1499 #if defined(DDB) 1500 /* 1501 * Leave interrupts enabled and don't clear DTR if this is the 1502 * console. This allows us to detect break-to-debugger events 1503 * while the console device is closed. 1504 */ 1505 if (com->unit != comconsole || 1506 (break_to_debugger == 0 && alt_break_to_debugger == 0)) 1507 #endif 1508 { 1509 sio_setreg(com, com_ier, 0); 1510 if (tp->t_cflag & HUPCL 1511 /* 1512 * XXX we will miss any carrier drop between here and the 1513 * next open. Perhaps we should watch DCD even when the 1514 * port is closed; it is not sufficient to check it at 1515 * the next open because it might go up and down while 1516 * we're not watching. 1517 */ 1518 || (!com->active_out 1519 && !(com->prev_modem_status & MSR_DCD) 1520 && !(com->it_in.c_cflag & CLOCAL)) 1521 || !(tp->t_state & TS_ISOPEN)) { 1522 (void)commctl(com, TIOCM_DTR, DMBIC); 1523 if (com->dtr_wait != 0 && !(com->state & CS_DTR_OFF)) { 1524 callout_reset(&com->dtr_ch, com->dtr_wait, 1525 siodtrwakeup, com); 1526 com->state |= CS_DTR_OFF; 1527 } 1528 } 1529 } 1530 if (com->hasfifo) { 1531 /* 1532 * Disable fifos so that they are off after controlled 1533 * reboots. Some BIOSes fail to detect 16550s when the 1534 * fifos are enabled. 1535 */ 1536 sio_setreg(com, com_fifo, 0); 1537 } 1538 com->active_out = FALSE; 1539 wakeup(&com->active_out); 1540 wakeup(TSA_CARR_ON(tp)); /* restart any wopeners */ 1541 lwkt_reltoken(&tty_token); 1542 crit_exit(); 1543 } 1544 1545 static int 1546 sioread(struct dev_read_args *ap) 1547 { 1548 cdev_t dev = ap->a_head.a_dev; 1549 int mynor, ret; 1550 struct com_s *com; 1551 1552 lwkt_gettoken(&tty_token); 1553 mynor = minor(dev); 1554 if (mynor & CONTROL_MASK) { 1555 lwkt_reltoken(&tty_token); 1556 return (ENODEV); 1557 } 1558 com = com_addr(MINOR_TO_UNIT(mynor)); 1559 if (com == NULL || com->gone) { 1560 lwkt_reltoken(&tty_token); 1561 return (ENODEV); 1562 } 1563 ret = ((*linesw[com->tp->t_line].l_read)(com->tp, ap->a_uio, ap->a_ioflag)); 1564 lwkt_reltoken(&tty_token); 1565 return ret; 1566 } 1567 1568 static int 1569 siowrite(struct dev_write_args *ap) 1570 { 1571 cdev_t dev = ap->a_head.a_dev; 1572 int mynor; 1573 struct com_s *com; 1574 int unit, ret; 1575 1576 lwkt_gettoken(&tty_token); 1577 mynor = minor(dev); 1578 if (mynor & CONTROL_MASK) { 1579 lwkt_reltoken(&tty_token); 1580 return (ENODEV); 1581 } 1582 1583 unit = MINOR_TO_UNIT(mynor); 1584 com = com_addr(unit); 1585 if (com == NULL || com->gone) { 1586 lwkt_reltoken(&tty_token); 1587 return (ENODEV); 1588 } 1589 /* 1590 * (XXX) We disallow virtual consoles if the physical console is 1591 * a serial port. This is in case there is a display attached that 1592 * is not the console. In that situation we don't need/want the X 1593 * server taking over the console. 1594 */ 1595 if (constty != NULL && unit == comconsole) 1596 constty = NULL; 1597 ret = ((*linesw[com->tp->t_line].l_write)(com->tp, ap->a_uio, ap->a_ioflag)); 1598 lwkt_reltoken(&tty_token); 1599 return ret; 1600 } 1601 1602 static void 1603 siobusycheck(void *chan) 1604 { 1605 struct com_s *com; 1606 1607 lwkt_gettoken(&tty_token); 1608 com = (struct com_s *)chan; 1609 1610 /* 1611 * Clear TS_BUSY if low-level output is complete. 1612 * spl locking is sufficient because siointr1() does not set CS_BUSY. 1613 * If siointr1() clears CS_BUSY after we look at it, then we'll get 1614 * called again. Reading the line status port outside of siointr1() 1615 * is safe because CS_BUSY is clear so there are no output interrupts 1616 * to lose. 1617 */ 1618 crit_enter(); 1619 if (com->state & CS_BUSY) 1620 com->extra_state &= ~CSE_BUSYCHECK; /* False alarm. */ 1621 else if ((inb(com->line_status_port) & (LSR_TSRE | LSR_TXRDY)) 1622 == (LSR_TSRE | LSR_TXRDY)) { 1623 com->tp->t_state &= ~TS_BUSY; 1624 ttwwakeup(com->tp); 1625 com->extra_state &= ~CSE_BUSYCHECK; 1626 } else { 1627 callout_reset(&com->busy_ch, hz / 100, siobusycheck, com); 1628 } 1629 crit_exit(); 1630 lwkt_reltoken(&tty_token); 1631 } 1632 1633 static u_int 1634 siodivisor(u_long rclk, speed_t speed) 1635 { 1636 long actual_speed; 1637 u_int divisor; 1638 int error; 1639 1640 if (speed == 0 || speed > ((speed_t)-1 - 1) / 8) 1641 return (0); 1642 divisor = (rclk / (8UL * speed) + 1) / 2; 1643 if (divisor == 0 || divisor >= 65536) 1644 return (0); 1645 actual_speed = rclk / (16UL * divisor); 1646 1647 /* 10 times error in percent: */ 1648 error = ((actual_speed - (long)speed) * 2000 / (long)speed + 1) / 2; 1649 1650 /* 3.0% maximum error tolerance: */ 1651 if (error < -30 || error > 30) 1652 return (0); 1653 1654 return (divisor); 1655 } 1656 1657 static void 1658 siodtrwakeup(void *chan) 1659 { 1660 struct com_s *com; 1661 1662 lwkt_gettoken(&tty_token); 1663 com = (struct com_s *)chan; 1664 com->state &= ~CS_DTR_OFF; 1665 wakeup(&com->dtr_wait); 1666 lwkt_reltoken(&tty_token); 1667 } 1668 1669 /* 1670 * NOTE: Normally called with tty_token held but might not be when 1671 * operating as the console. 1672 * 1673 * Must be called with com_lock 1674 */ 1675 #define SIOCOPYSIZE 64 1676 1677 static void 1678 sioinput(struct com_s *com) 1679 { 1680 u_char line_status; 1681 int recv_data; 1682 int incc; 1683 int i; 1684 struct tty *tp; 1685 uint8_t buf[SIOCOPYSIZE]; 1686 1687 /* 1688 * Process a block of data queued by siointr1() and shift the buffer 1689 * in order to allow the interrupt to continue to pipeline data as 1690 * we process each block. This is a retrofit of old code, otherwise 1691 * I'd just use a rollover FIFO. 1692 */ 1693 tp = com->tp; 1694 again: 1695 if (!(tp->t_state & TS_ISOPEN) || !(tp->t_cflag & CREAD)) { 1696 com->iptr = com->ibuf; 1697 return; 1698 } 1699 incc = com->iptr - com->ibuf; 1700 if (incc > SIOCOPYSIZE) { 1701 bcopy(com->ibuf, buf, SIOCOPYSIZE); 1702 bcopy(com->ibuf + SIOCOPYSIZE, com->ibuf, incc - SIOCOPYSIZE); 1703 com->iptr = com->ibuf + incc - SIOCOPYSIZE; 1704 incc = SIOCOPYSIZE; 1705 } else { 1706 bcopy(com->ibuf, buf, incc); 1707 com->iptr = com->ibuf; 1708 } 1709 line_status = com->iptr[com->ierroff]; 1710 1711 /* 1712 * There is now room for another low-level buffer full of input, 1713 * so enable RTS if it is now disabled and there is room in the 1714 * high-level buffer. 1715 */ 1716 if ((com->state & CS_RTS_IFLOW) && !(com->mcr_image & MCR_RTS) && 1717 !(tp->t_state & TS_TBLOCK)) { 1718 outb(com->modem_ctl_port, com->mcr_image |= MCR_RTS); 1719 } 1720 com_unlock(); 1721 1722 /* 1723 * Process the input block 1724 */ 1725 for (i = 0; i < incc; ++i) { 1726 recv_data = buf[i]; 1727 if (line_status 1728 & (LSR_BI | LSR_FE | LSR_OE | LSR_PE)) { 1729 if (line_status & LSR_BI) 1730 recv_data |= TTY_BI; 1731 if (line_status & LSR_FE) 1732 recv_data |= TTY_FE; 1733 if (line_status & LSR_OE) 1734 recv_data |= TTY_OE; 1735 if (line_status & LSR_PE) 1736 recv_data |= TTY_PE; 1737 } 1738 (*linesw[tp->t_line].l_rint)(recv_data, tp); 1739 line_status = 0; 1740 } 1741 com_lock(); 1742 1743 if (com->iptr != com->ibuf) 1744 goto again; 1745 } 1746 1747 static void 1748 siointr(void *arg) 1749 { 1750 lwkt_gettoken(&tty_token); 1751 #ifndef COM_MULTIPORT 1752 com_lock(); 1753 siointr1((struct com_s *) arg); 1754 com_unlock(); 1755 #else /* COM_MULTIPORT */ 1756 bool_t possibly_more_intrs; 1757 int unit; 1758 struct com_s *com; 1759 1760 /* 1761 * Loop until there is no activity on any port. This is necessary 1762 * to get an interrupt edge more than to avoid another interrupt. 1763 * If the IRQ signal is just an OR of the IRQ signals from several 1764 * devices, then the edge from one may be lost because another is 1765 * on. 1766 */ 1767 com_lock(); 1768 do { 1769 possibly_more_intrs = FALSE; 1770 for (unit = 0; unit < sio_numunits; ++unit) { 1771 com = com_addr(unit); 1772 /* 1773 * XXX com_lock(); 1774 * would it work here, or be counter-productive? 1775 */ 1776 if (com != NULL 1777 && !com->gone 1778 && (inb(com->int_id_port) & IIR_IMASK) 1779 != IIR_NOPEND) { 1780 siointr1(com); 1781 possibly_more_intrs = TRUE; 1782 } 1783 /* XXX com_unlock(); */ 1784 } 1785 } while (possibly_more_intrs); 1786 com_unlock(); 1787 #endif /* COM_MULTIPORT */ 1788 lwkt_reltoken(&tty_token); 1789 } 1790 1791 /* 1792 * Called with tty_token held and com_lock held. 1793 */ 1794 static void 1795 siointr1(struct com_s *com) 1796 { 1797 u_char line_status; 1798 u_char modem_status; 1799 u_char *ioptr; 1800 u_char recv_data; 1801 u_char int_ctl; 1802 u_char int_ctl_new; 1803 sysclock_t count; 1804 1805 int_ctl = inb(com->intr_ctl_port); 1806 int_ctl_new = int_ctl; 1807 1808 while (!com->gone) { 1809 if (com->pps.ppsparam.mode & PPS_CAPTUREBOTH) { 1810 modem_status = inb(com->modem_status_port); 1811 if ((modem_status ^ com->last_modem_status) & MSR_DCD) { 1812 count = sys_cputimer->count(); 1813 pps_event(&com->pps, count, 1814 (modem_status & MSR_DCD) ? 1815 PPS_CAPTUREASSERT : PPS_CAPTURECLEAR); 1816 } 1817 } 1818 line_status = inb(com->line_status_port); 1819 1820 /* input event? (check first to help avoid overruns) */ 1821 while (line_status & LSR_RCV_MASK) { 1822 /* break/unnattached error bits or real input? */ 1823 if (!(line_status & LSR_RXRDY)) 1824 recv_data = 0; 1825 else 1826 recv_data = inb(com->data_port); 1827 #if defined(DDB) 1828 /* 1829 * Solaris implements a new BREAK which is initiated 1830 * by a character sequence CR ~ ^b which is similar 1831 * to a familiar pattern used on Sun servers by the 1832 * Remote Console. 1833 */ 1834 #define KEY_CRTLB 2 /* ^B */ 1835 #define KEY_CR 13 /* CR '\r' */ 1836 #define KEY_TILDE 126 /* ~ */ 1837 1838 if (com->unit == comconsole && alt_break_to_debugger) { 1839 static int brk_state1 = 0, brk_state2 = 0; 1840 if (recv_data == KEY_CR) { 1841 brk_state1 = recv_data; 1842 brk_state2 = 0; 1843 } else if (brk_state1 == KEY_CR && (recv_data == KEY_TILDE || recv_data == KEY_CRTLB)) { 1844 if (recv_data == KEY_TILDE) 1845 brk_state2 = recv_data; 1846 else if (brk_state2 == KEY_TILDE && recv_data == KEY_CRTLB) { 1847 com_unlock(); 1848 breakpoint(); 1849 com_lock(); 1850 brk_state1 = brk_state2 = 0; 1851 goto cont; 1852 } else 1853 brk_state2 = 0; 1854 } else 1855 brk_state1 = 0; 1856 } 1857 #endif 1858 if (line_status & (LSR_BI | LSR_FE | LSR_PE)) { 1859 /* 1860 * Don't store BI if IGNBRK or FE/PE if IGNPAR. 1861 * Otherwise, push the work to a higher level 1862 * (to handle PARMRK) if we're bypassing. 1863 * Otherwise, convert BI/FE and PE+INPCK to 0. 1864 * 1865 * This makes bypassing work right in the 1866 * usual "raw" case (IGNBRK set, and IGNPAR 1867 * and INPCK clear). 1868 * 1869 * Note: BI together with FE/PE means just BI. 1870 */ 1871 if (line_status & LSR_BI) { 1872 #if defined(DDB) 1873 if (com->unit == comconsole && 1874 break_to_debugger) { 1875 com_unlock(); 1876 breakpoint(); 1877 com_lock(); 1878 goto cont; 1879 } 1880 #endif 1881 if (com->tp == NULL 1882 || com->tp->t_iflag & IGNBRK) 1883 goto cont; 1884 } else { 1885 if (com->tp == NULL 1886 || com->tp->t_iflag & IGNPAR) 1887 goto cont; 1888 } 1889 if (com->tp->t_state & TS_CAN_BYPASS_L_RINT 1890 && (line_status & (LSR_BI | LSR_FE) 1891 || com->tp->t_iflag & INPCK)) 1892 recv_data = 0; 1893 } 1894 ++com->bytes_in; 1895 if (com->hotchar != 0 && recv_data == com->hotchar) 1896 setsofttty(); 1897 ioptr = com->iptr; 1898 if (ioptr >= com->ibufend) { 1899 CE_RECORD(com, CE_INTERRUPT_BUF_OVERFLOW); 1900 } else { 1901 if (com->do_timestamp) 1902 microtime(&com->timestamp); 1903 schedsofttty(); 1904 #if 0 /* for testing input latency vs efficiency */ 1905 if (com->iptr - com->ibuf == 8) 1906 setsofttty(); 1907 #endif 1908 ioptr[0] = recv_data; 1909 ioptr[com->ierroff] = line_status; 1910 com->iptr = ++ioptr; 1911 if (ioptr == com->ihighwater 1912 && com->state & CS_RTS_IFLOW) 1913 outb(com->modem_ctl_port, 1914 com->mcr_image &= ~MCR_RTS); 1915 if (line_status & LSR_OE) 1916 CE_RECORD(com, CE_OVERRUN); 1917 } 1918 cont: 1919 /* 1920 * "& 0x7F" is to avoid the gcc-1.40 generating a slow 1921 * jump from the top of the loop to here 1922 */ 1923 line_status = inb(com->line_status_port) & 0x7F; 1924 } 1925 1926 /* modem status change? (always check before doing output) */ 1927 modem_status = inb(com->modem_status_port); 1928 if (modem_status != com->last_modem_status) { 1929 if (com->do_dcd_timestamp 1930 && !(com->last_modem_status & MSR_DCD) 1931 && modem_status & MSR_DCD) 1932 microtime(&com->dcd_timestamp); 1933 1934 /* 1935 * Schedule high level to handle DCD changes. Note 1936 * that we don't use the delta bits anywhere. Some 1937 * UARTs mess them up, and it's easy to remember the 1938 * previous bits and calculate the delta. 1939 */ 1940 com->last_modem_status = modem_status; 1941 if (!(com->state & CS_CHECKMSR)) { 1942 com->state |= CS_CHECKMSR; 1943 setsofttty(); 1944 } 1945 1946 /* handle CTS change immediately for crisp flow ctl */ 1947 if (com->state & CS_CTS_OFLOW) { 1948 if (modem_status & MSR_CTS) 1949 com->state |= CS_ODEVREADY; 1950 else 1951 com->state &= ~CS_ODEVREADY; 1952 } 1953 } 1954 1955 /* output queued and everything ready? */ 1956 if ((line_status & LSR_TXRDY) 1957 && com->state >= (CS_BUSY | CS_TTGO | CS_ODEVREADY)) { 1958 ioptr = com->obufq.l_head; 1959 if (com->tx_fifo_size > 1) { 1960 u_int ocount; 1961 1962 ocount = com->obufq.l_tail - ioptr; 1963 if (ocount > com->tx_fifo_size) 1964 ocount = com->tx_fifo_size; 1965 com->bytes_out += ocount; 1966 do 1967 outb(com->data_port, *ioptr++); 1968 while (--ocount != 0); 1969 } else { 1970 outb(com->data_port, *ioptr++); 1971 ++com->bytes_out; 1972 } 1973 com->obufq.l_head = ioptr; 1974 if (COM_IIR_TXRDYBUG(com->flags)) { 1975 int_ctl_new = int_ctl | IER_ETXRDY; 1976 } 1977 if (ioptr >= com->obufq.l_tail) { 1978 struct lbq *qp; 1979 1980 qp = com->obufq.l_next; 1981 qp->l_queued = FALSE; 1982 qp = qp->l_next; 1983 if (qp != NULL) { 1984 com->obufq.l_head = qp->l_head; 1985 com->obufq.l_tail = qp->l_tail; 1986 com->obufq.l_next = qp; 1987 } else { 1988 /* output just completed */ 1989 if (COM_IIR_TXRDYBUG(com->flags)) { 1990 int_ctl_new = int_ctl & ~IER_ETXRDY; 1991 } 1992 com->state &= ~CS_BUSY; 1993 } 1994 if (!(com->state & CS_ODONE)) { 1995 com->state |= CS_ODONE; 1996 setsofttty(); /* handle at high level ASAP */ 1997 } 1998 } 1999 if (COM_IIR_TXRDYBUG(com->flags) && (int_ctl != int_ctl_new)) { 2000 outb(com->intr_ctl_port, int_ctl_new); 2001 } 2002 } 2003 2004 /* finished? */ 2005 #ifdef COM_MULTIPORT 2006 return; 2007 #else 2008 if (inb(com->int_id_port) & IIR_NOPEND) 2009 return; 2010 #endif 2011 } 2012 } 2013 2014 static int 2015 sioioctl(struct dev_ioctl_args *ap) 2016 { 2017 cdev_t dev = ap->a_head.a_dev; 2018 caddr_t data = ap->a_data; 2019 struct com_s *com; 2020 int error; 2021 int mynor; 2022 struct tty *tp; 2023 2024 lwkt_gettoken(&tty_token); 2025 mynor = minor(dev); 2026 2027 com = com_addr(MINOR_TO_UNIT(mynor)); 2028 if (com == NULL || com->gone) { 2029 lwkt_reltoken(&tty_token); 2030 return (ENODEV); 2031 } 2032 if (mynor & CONTROL_MASK) { 2033 struct termios *ct; 2034 2035 switch (mynor & CONTROL_MASK) { 2036 case CONTROL_INIT_STATE: 2037 ct = mynor & CALLOUT_MASK ? &com->it_out : &com->it_in; 2038 break; 2039 case CONTROL_LOCK_STATE: 2040 ct = mynor & CALLOUT_MASK ? &com->lt_out : &com->lt_in; 2041 break; 2042 default: 2043 lwkt_reltoken(&tty_token); 2044 return (ENODEV); /* /dev/nodev */ 2045 } 2046 switch (ap->a_cmd) { 2047 case TIOCSETA: 2048 error = priv_check_cred(ap->a_cred, PRIV_ROOT, 0); 2049 if (error != 0) { 2050 lwkt_reltoken(&tty_token); 2051 return (error); 2052 } 2053 *ct = *(struct termios *)data; 2054 lwkt_reltoken(&tty_token); 2055 return (0); 2056 case TIOCGETA: 2057 *(struct termios *)data = *ct; 2058 lwkt_reltoken(&tty_token); 2059 return (0); 2060 case TIOCGETD: 2061 *(int *)data = TTYDISC; 2062 lwkt_reltoken(&tty_token); 2063 return (0); 2064 case TIOCGWINSZ: 2065 bzero(data, sizeof(struct winsize)); 2066 lwkt_reltoken(&tty_token); 2067 return (0); 2068 default: 2069 lwkt_reltoken(&tty_token); 2070 return (ENOTTY); 2071 } 2072 } 2073 tp = com->tp; 2074 if (ap->a_cmd == TIOCSETA || ap->a_cmd == TIOCSETAW || 2075 ap->a_cmd == TIOCSETAF) { 2076 int cc; 2077 struct termios *dt = (struct termios *)data; 2078 struct termios *lt = mynor & CALLOUT_MASK 2079 ? &com->lt_out : &com->lt_in; 2080 2081 dt->c_iflag = (tp->t_iflag & lt->c_iflag) 2082 | (dt->c_iflag & ~lt->c_iflag); 2083 dt->c_oflag = (tp->t_oflag & lt->c_oflag) 2084 | (dt->c_oflag & ~lt->c_oflag); 2085 dt->c_cflag = (tp->t_cflag & lt->c_cflag) 2086 | (dt->c_cflag & ~lt->c_cflag); 2087 dt->c_lflag = (tp->t_lflag & lt->c_lflag) 2088 | (dt->c_lflag & ~lt->c_lflag); 2089 for (cc = 0; cc < NCCS; ++cc) 2090 if (lt->c_cc[cc] != 0) 2091 dt->c_cc[cc] = tp->t_cc[cc]; 2092 if (lt->c_ispeed != 0) 2093 dt->c_ispeed = tp->t_ispeed; 2094 if (lt->c_ospeed != 0) 2095 dt->c_ospeed = tp->t_ospeed; 2096 } 2097 error = (*linesw[tp->t_line].l_ioctl)(tp, ap->a_cmd, data, ap->a_fflag, ap->a_cred); 2098 if (error != ENOIOCTL) { 2099 lwkt_reltoken(&tty_token); 2100 return (error); 2101 } 2102 crit_enter(); 2103 error = ttioctl(tp, ap->a_cmd, data, ap->a_fflag); 2104 disc_optim(tp, &tp->t_termios, com); 2105 if (error != ENOIOCTL) { 2106 crit_exit(); 2107 lwkt_reltoken(&tty_token); 2108 return (error); 2109 } 2110 switch (ap->a_cmd) { 2111 case TIOCSBRK: 2112 sio_setreg(com, com_cfcr, com->cfcr_image |= CFCR_SBREAK); 2113 break; 2114 case TIOCCBRK: 2115 sio_setreg(com, com_cfcr, com->cfcr_image &= ~CFCR_SBREAK); 2116 break; 2117 case TIOCSDTR: 2118 (void)commctl(com, TIOCM_DTR, DMBIS); 2119 break; 2120 case TIOCCDTR: 2121 (void)commctl(com, TIOCM_DTR, DMBIC); 2122 break; 2123 /* 2124 * XXX should disallow changing MCR_RTS if CS_RTS_IFLOW is set. The 2125 * changes get undone on the next call to comparam(). 2126 */ 2127 case TIOCMSET: 2128 (void)commctl(com, *(int *)data, DMSET); 2129 break; 2130 case TIOCMBIS: 2131 (void)commctl(com, *(int *)data, DMBIS); 2132 break; 2133 case TIOCMBIC: 2134 (void)commctl(com, *(int *)data, DMBIC); 2135 break; 2136 case TIOCMGET: 2137 *(int *)data = commctl(com, 0, DMGET); 2138 break; 2139 case TIOCMSDTRWAIT: 2140 /* must be root since the wait applies to following logins */ 2141 error = priv_check_cred(ap->a_cred, PRIV_ROOT, 0); 2142 if (error != 0) { 2143 crit_exit(); 2144 lwkt_reltoken(&tty_token); 2145 return (error); 2146 } 2147 com->dtr_wait = *(int *)data * hz / 100; 2148 break; 2149 case TIOCMGDTRWAIT: 2150 *(int *)data = com->dtr_wait * 100 / hz; 2151 break; 2152 case TIOCTIMESTAMP: 2153 com->do_timestamp = TRUE; 2154 *(struct timeval *)data = com->timestamp; 2155 break; 2156 case TIOCDCDTIMESTAMP: 2157 com->do_dcd_timestamp = TRUE; 2158 *(struct timeval *)data = com->dcd_timestamp; 2159 break; 2160 default: 2161 crit_exit(); 2162 error = pps_ioctl(ap->a_cmd, data, &com->pps); 2163 if (error == ENODEV) 2164 error = ENOTTY; 2165 lwkt_reltoken(&tty_token); 2166 return (error); 2167 } 2168 crit_exit(); 2169 lwkt_reltoken(&tty_token); 2170 return (0); 2171 } 2172 2173 static void 2174 siopoll(void *dummy, void *frame) 2175 { 2176 int unit; 2177 int any; 2178 2179 lwkt_gettoken(&tty_token); 2180 repeat: 2181 any = 0; 2182 for (unit = 0; unit < sio_numunits; ++unit) { 2183 struct com_s *com; 2184 int incc; 2185 struct tty *tp; 2186 2187 com = com_addr(unit); 2188 if (com == NULL) 2189 continue; 2190 tp = com->tp; 2191 if (tp == NULL || com->gone) { 2192 /* 2193 * Discard any events related to never-opened or 2194 * going-away devices. 2195 */ 2196 com_lock(); 2197 incc = com->iptr - com->ibuf; 2198 com->iptr = com->ibuf; 2199 if (com->state & CS_CHECKMSR) { 2200 incc += LOTS_OF_EVENTS; 2201 com->state &= ~CS_CHECKMSR; 2202 } 2203 com_unlock(); 2204 continue; 2205 } 2206 if (com->iptr != com->ibuf) { 2207 com_lock(); 2208 sioinput(com); 2209 com_unlock(); 2210 any = 1; 2211 } 2212 if (com->state & CS_CHECKMSR) { 2213 u_char delta_modem_status; 2214 2215 com_lock(); 2216 delta_modem_status = com->last_modem_status 2217 ^ com->prev_modem_status; 2218 com->prev_modem_status = com->last_modem_status; 2219 com->state &= ~CS_CHECKMSR; 2220 com_unlock(); 2221 if (delta_modem_status) 2222 any = 1; 2223 if (delta_modem_status & MSR_DCD) { 2224 (*linesw[tp->t_line].l_modem) 2225 (tp, com->prev_modem_status & MSR_DCD); 2226 } 2227 } 2228 if (com->state & CS_ODONE) { 2229 com_lock(); 2230 com->state &= ~CS_ODONE; 2231 com_unlock(); 2232 if (!(com->state & CS_BUSY) 2233 && !(com->extra_state & CSE_BUSYCHECK)) { 2234 callout_reset(&com->busy_ch, hz / 100, 2235 siobusycheck, com); 2236 com->extra_state |= CSE_BUSYCHECK; 2237 } 2238 (*linesw[tp->t_line].l_start)(tp); 2239 } 2240 } 2241 if (any) 2242 goto repeat; 2243 lwkt_reltoken(&tty_token); 2244 } 2245 2246 /* 2247 * Called with tty_token held but no com_lock 2248 */ 2249 static int 2250 comparam(struct tty *tp, struct termios *t) 2251 { 2252 u_int cfcr; 2253 int cflag; 2254 struct com_s *com; 2255 u_int divisor; 2256 u_char dlbh; 2257 u_char dlbl; 2258 int unit; 2259 2260 unit = DEV_TO_UNIT(tp->t_dev); 2261 com = com_addr(unit); 2262 if (com == NULL) { 2263 return (ENODEV); 2264 } 2265 2266 /* do historical conversions */ 2267 if (t->c_ispeed == 0) 2268 t->c_ispeed = t->c_ospeed; 2269 2270 /* check requested parameters */ 2271 if (t->c_ospeed == 0) { 2272 divisor = 0; 2273 } else { 2274 if (t->c_ispeed != t->c_ospeed) 2275 return (EINVAL); 2276 divisor = siodivisor(com->rclk, t->c_ispeed); 2277 if (divisor == 0) 2278 return (EINVAL); 2279 } 2280 2281 /* parameters are OK, convert them to the com struct and the device */ 2282 crit_enter(); 2283 if (divisor == 0) 2284 (void)commctl(com, TIOCM_DTR, DMBIC); /* hang up line */ 2285 else 2286 (void)commctl(com, TIOCM_DTR, DMBIS); 2287 cflag = t->c_cflag; 2288 switch (cflag & CSIZE) { 2289 case CS5: 2290 cfcr = CFCR_5BITS; 2291 break; 2292 case CS6: 2293 cfcr = CFCR_6BITS; 2294 break; 2295 case CS7: 2296 cfcr = CFCR_7BITS; 2297 break; 2298 default: 2299 cfcr = CFCR_8BITS; 2300 break; 2301 } 2302 if (cflag & PARENB) { 2303 cfcr |= CFCR_PENAB; 2304 if (!(cflag & PARODD)) 2305 cfcr |= CFCR_PEVEN; 2306 } 2307 if (cflag & CSTOPB) 2308 cfcr |= CFCR_STOPB; 2309 2310 if (com->hasfifo && divisor != 0) { 2311 /* 2312 * Use a fifo trigger level low enough so that the input 2313 * latency from the fifo is less than about 16 msec and 2314 * the total latency is less than about 30 msec. These 2315 * latencies are reasonable for humans. Serial comms 2316 * protocols shouldn't expect anything better since modem 2317 * latencies are larger. 2318 * 2319 * Interrupts can be held up for long periods of time 2320 * due to inefficiencies in other parts of the kernel, 2321 * certain video cards, etc. Setting the FIFO trigger 2322 * point to MEDH instead of HIGH gives us 694uS of slop 2323 * (8 character times) instead of 173uS (2 character times) 2324 * @ 115200 bps. 2325 */ 2326 com->fifo_image = t->c_ospeed <= 4800 2327 ? FIFO_ENABLE : FIFO_ENABLE | FIFO_RX_MEDH; 2328 #ifdef COM_ESP 2329 /* 2330 * The Hayes ESP card needs the fifo DMA mode bit set 2331 * in compatibility mode. If not, it will interrupt 2332 * for each character received. 2333 */ 2334 if (com->esp) 2335 com->fifo_image |= FIFO_DMA_MODE; 2336 #endif 2337 sio_setreg(com, com_fifo, com->fifo_image); 2338 } 2339 2340 /* 2341 * This returns with interrupts disabled so that we can complete 2342 * the speed change atomically. Keeping interrupts disabled is 2343 * especially important while com_data is hidden. 2344 */ 2345 siocntxwait(com->bsh); 2346 (void) siosetwater(com, t->c_ispeed); 2347 2348 if (divisor != 0) { 2349 sio_setreg(com, com_cfcr, cfcr | CFCR_DLAB); 2350 /* 2351 * Only set the divisor registers if they would change, 2352 * since on some 16550 incompatibles (UMC8669F), setting 2353 * them while input is arriving them loses sync until 2354 * data stops arriving. 2355 */ 2356 dlbl = divisor & 0xFF; 2357 if (sio_getreg(com, com_dlbl) != dlbl) 2358 sio_setreg(com, com_dlbl, dlbl); 2359 dlbh = divisor >> 8; 2360 if (sio_getreg(com, com_dlbh) != dlbh) 2361 sio_setreg(com, com_dlbh, dlbh); 2362 } 2363 sio_setreg(com, com_cfcr, com->cfcr_image = cfcr); 2364 2365 if (!(tp->t_state & TS_TTSTOP)) 2366 com->state |= CS_TTGO; 2367 2368 if (cflag & CRTS_IFLOW) { 2369 if (com->st16650a) { 2370 sio_setreg(com, com_cfcr, 0xbf); 2371 sio_setreg(com, com_fifo, 2372 sio_getreg(com, com_fifo) | 0x40); 2373 } 2374 com->state |= CS_RTS_IFLOW; 2375 /* 2376 * If CS_RTS_IFLOW just changed from off to on, the change 2377 * needs to be propagated to MCR_RTS. This isn't urgent, 2378 * so do it later by calling comstart() instead of repeating 2379 * a lot of code from comstart() here. 2380 */ 2381 } else if (com->state & CS_RTS_IFLOW) { 2382 com->state &= ~CS_RTS_IFLOW; 2383 /* 2384 * CS_RTS_IFLOW just changed from on to off. Force MCR_RTS 2385 * on here, since comstart() won't do it later. 2386 */ 2387 outb(com->modem_ctl_port, com->mcr_image |= MCR_RTS); 2388 if (com->st16650a) { 2389 sio_setreg(com, com_cfcr, 0xbf); 2390 sio_setreg(com, com_fifo, 2391 sio_getreg(com, com_fifo) & ~0x40); 2392 } 2393 } 2394 2395 /* 2396 * Set up state to handle output flow control. 2397 * XXX - worth handling MDMBUF (DCD) flow control at the lowest level? 2398 * Now has 10+ msec latency, while CTS flow has 50- usec latency. 2399 */ 2400 com->state |= CS_ODEVREADY; 2401 com->state &= ~CS_CTS_OFLOW; 2402 if (cflag & CCTS_OFLOW) { 2403 com->state |= CS_CTS_OFLOW; 2404 if (!(com->last_modem_status & MSR_CTS)) 2405 com->state &= ~CS_ODEVREADY; 2406 if (com->st16650a) { 2407 sio_setreg(com, com_cfcr, 0xbf); 2408 sio_setreg(com, com_fifo, 2409 sio_getreg(com, com_fifo) | 0x80); 2410 } 2411 } else { 2412 if (com->st16650a) { 2413 sio_setreg(com, com_cfcr, 0xbf); 2414 sio_setreg(com, com_fifo, 2415 sio_getreg(com, com_fifo) & ~0x80); 2416 } 2417 } 2418 2419 sio_setreg(com, com_cfcr, com->cfcr_image); 2420 2421 /* XXX shouldn't call functions while intrs are disabled. */ 2422 disc_optim(tp, t, com); 2423 /* 2424 * Recover from fiddling with CS_TTGO. We used to call siointr1() 2425 * unconditionally, but that defeated the careful discarding of 2426 * stale input in sioopen(). 2427 */ 2428 if (com->state >= (CS_BUSY | CS_TTGO)) { 2429 com_lock(); 2430 siointr1(com); 2431 com_unlock(); 2432 } 2433 crit_exit(); 2434 comstart(tp); 2435 if (com->ibufold != NULL) { 2436 kfree(com->ibufold, M_DEVBUF); 2437 com->ibufold = NULL; 2438 } 2439 return (0); 2440 } 2441 2442 /* 2443 * called with tty_token held 2444 */ 2445 static int 2446 siosetwater(struct com_s *com, speed_t speed) 2447 { 2448 int cp4ticks; 2449 u_char *ibuf; 2450 int ibufsize; 2451 struct tty *tp; 2452 2453 /* 2454 * Make the buffer size large enough to handle a softtty interrupt 2455 * latency of about 2 ticks without loss of throughput or data 2456 * (about 3 ticks if input flow control is not used or not honoured, 2457 * but a bit less for CS5-CS7 modes). 2458 */ 2459 cp4ticks = speed / 10 / hz * 4; 2460 for (ibufsize = 128; ibufsize < cp4ticks;) 2461 ibufsize <<= 1; 2462 if (ibufsize == com->ibufsize) 2463 return (0); 2464 2465 /* 2466 * Allocate input buffer. The extra factor of 2 in the size is 2467 * to allow for an error byte for each input byte. 2468 */ 2469 ibuf = kmalloc(2 * ibufsize, M_DEVBUF, M_WAITOK | M_ZERO); 2470 2471 /* Initialize non-critical variables. */ 2472 com->ibufold = com->ibuf; 2473 com->ibufsize = ibufsize; 2474 tp = com->tp; 2475 if (tp != NULL) { 2476 tp->t_ififosize = 2 * ibufsize; 2477 tp->t_ispeedwat = (speed_t)-1; 2478 tp->t_ospeedwat = (speed_t)-1; 2479 } 2480 2481 /* 2482 * Read current input buffer. 2483 */ 2484 com_lock(); 2485 if (com->iptr != com->ibuf) 2486 sioinput(com); 2487 2488 /*- 2489 * Initialize critical variables, including input buffer watermarks. 2490 * The external device is asked to stop sending when the buffer 2491 * exactly reaches high water, or when the high level requests it. 2492 * The high level is notified immediately (rather than at a later 2493 * clock tick) when this watermark is reached. 2494 * The buffer size is chosen so the watermark should almost never 2495 * be reached. 2496 * The low watermark is invisibly 0 since the buffer is always 2497 * emptied all at once. 2498 */ 2499 com->iptr = com->ibuf = ibuf; 2500 com->ibufend = ibuf + ibufsize; 2501 com->ierroff = ibufsize; 2502 com->ihighwater = ibuf + 3 * ibufsize / 4; 2503 com_unlock(); 2504 return (0); 2505 } 2506 2507 static void 2508 comstart(struct tty *tp) 2509 { 2510 struct com_s *com; 2511 int unit; 2512 2513 lwkt_gettoken(&tty_token); 2514 unit = DEV_TO_UNIT(tp->t_dev); 2515 com = com_addr(unit); 2516 if (com == NULL) { 2517 lwkt_reltoken(&tty_token); 2518 return; 2519 } 2520 crit_enter(); 2521 com_lock(); 2522 if (tp->t_state & TS_TTSTOP) 2523 com->state &= ~CS_TTGO; 2524 else 2525 com->state |= CS_TTGO; 2526 if (tp->t_state & TS_TBLOCK) { 2527 if (com->mcr_image & MCR_RTS && com->state & CS_RTS_IFLOW) 2528 outb(com->modem_ctl_port, com->mcr_image &= ~MCR_RTS); 2529 } else { 2530 if (!(com->mcr_image & MCR_RTS) && com->iptr < com->ihighwater 2531 && com->state & CS_RTS_IFLOW) 2532 outb(com->modem_ctl_port, com->mcr_image |= MCR_RTS); 2533 } 2534 com_unlock(); 2535 if (tp->t_state & (TS_TIMEOUT | TS_TTSTOP)) { 2536 ttwwakeup(tp); 2537 crit_exit(); 2538 lwkt_reltoken(&tty_token); 2539 return; 2540 } 2541 if (tp->t_outq.c_cc != 0) { 2542 struct lbq *qp; 2543 struct lbq *next; 2544 2545 if (!com->obufs[0].l_queued) { 2546 com->obufs[0].l_tail 2547 = com->obuf1 + clist_qtob(&tp->t_outq, com->obuf1, 2548 sizeof com->obuf1); 2549 com->obufs[0].l_next = NULL; 2550 com->obufs[0].l_queued = TRUE; 2551 com_lock(); 2552 if (com->state & CS_BUSY) { 2553 qp = com->obufq.l_next; 2554 while ((next = qp->l_next) != NULL) 2555 qp = next; 2556 qp->l_next = &com->obufs[0]; 2557 } else { 2558 com->obufq.l_head = com->obufs[0].l_head; 2559 com->obufq.l_tail = com->obufs[0].l_tail; 2560 com->obufq.l_next = &com->obufs[0]; 2561 com->state |= CS_BUSY; 2562 } 2563 com_unlock(); 2564 } 2565 if (tp->t_outq.c_cc != 0 && !com->obufs[1].l_queued) { 2566 com->obufs[1].l_tail 2567 = com->obuf2 + clist_qtob(&tp->t_outq, com->obuf2, 2568 sizeof com->obuf2); 2569 com->obufs[1].l_next = NULL; 2570 com->obufs[1].l_queued = TRUE; 2571 com_lock(); 2572 if (com->state & CS_BUSY) { 2573 qp = com->obufq.l_next; 2574 while ((next = qp->l_next) != NULL) 2575 qp = next; 2576 qp->l_next = &com->obufs[1]; 2577 } else { 2578 com->obufq.l_head = com->obufs[1].l_head; 2579 com->obufq.l_tail = com->obufs[1].l_tail; 2580 com->obufq.l_next = &com->obufs[1]; 2581 com->state |= CS_BUSY; 2582 } 2583 com_unlock(); 2584 } 2585 tp->t_state |= TS_BUSY; 2586 } 2587 com_lock(); 2588 if (com->state >= (CS_BUSY | CS_TTGO)) 2589 siointr1(com); /* fake interrupt to start output */ 2590 com_unlock(); 2591 ttwwakeup(tp); 2592 crit_exit(); 2593 lwkt_reltoken(&tty_token); 2594 } 2595 2596 static void 2597 comstop(struct tty *tp, int rw) 2598 { 2599 struct com_s *com; 2600 2601 lwkt_gettoken(&tty_token); 2602 com = com_addr(DEV_TO_UNIT(tp->t_dev)); 2603 if (com == NULL || com->gone) { 2604 lwkt_reltoken(&tty_token); 2605 return; 2606 } 2607 com_lock(); 2608 if (rw & FWRITE) { 2609 if (com->hasfifo) 2610 #ifdef COM_ESP 2611 /* XXX avoid h/w bug. */ 2612 if (!com->esp) 2613 #endif 2614 sio_setreg(com, com_fifo, 2615 FIFO_XMT_RST | com->fifo_image); 2616 com->obufs[0].l_queued = FALSE; 2617 com->obufs[1].l_queued = FALSE; 2618 com->state &= ~(CS_ODONE | CS_BUSY); 2619 com->tp->t_state &= ~TS_BUSY; 2620 } 2621 if (rw & FREAD) { 2622 if (com->hasfifo) 2623 #ifdef COM_ESP 2624 /* XXX avoid h/w bug. */ 2625 if (!com->esp) 2626 #endif 2627 sio_setreg(com, com_fifo, 2628 FIFO_RCV_RST | com->fifo_image); 2629 com->iptr = com->ibuf; 2630 } 2631 com_unlock(); 2632 comstart(tp); 2633 lwkt_reltoken(&tty_token); 2634 } 2635 2636 static int 2637 commctl(struct com_s *com, int bits, int how) 2638 { 2639 int mcr; 2640 int msr; 2641 2642 lwkt_gettoken(&tty_token); 2643 if (how == DMGET) { 2644 bits = TIOCM_LE; /* XXX - always enabled while open */ 2645 mcr = com->mcr_image; 2646 if (mcr & MCR_DTR) 2647 bits |= TIOCM_DTR; 2648 if (mcr & MCR_RTS) 2649 bits |= TIOCM_RTS; 2650 msr = com->prev_modem_status; 2651 if (msr & MSR_CTS) 2652 bits |= TIOCM_CTS; 2653 if (msr & MSR_DCD) 2654 bits |= TIOCM_CD; 2655 if (msr & MSR_DSR) 2656 bits |= TIOCM_DSR; 2657 /* 2658 * XXX - MSR_RI is naturally volatile, and we make MSR_TERI 2659 * more volatile by reading the modem status a lot. Perhaps 2660 * we should latch both bits until the status is read here. 2661 */ 2662 if (msr & (MSR_RI | MSR_TERI)) 2663 bits |= TIOCM_RI; 2664 lwkt_reltoken(&tty_token); 2665 return (bits); 2666 } 2667 mcr = 0; 2668 if (bits & TIOCM_DTR) 2669 mcr |= MCR_DTR; 2670 if (bits & TIOCM_RTS) 2671 mcr |= MCR_RTS; 2672 if (com->gone) { 2673 lwkt_reltoken(&tty_token); 2674 return(0); 2675 } 2676 com_lock(); 2677 switch (how) { 2678 case DMSET: 2679 outb(com->modem_ctl_port, 2680 com->mcr_image = mcr | (com->mcr_image & MCR_IENABLE)); 2681 break; 2682 case DMBIS: 2683 outb(com->modem_ctl_port, com->mcr_image |= mcr); 2684 break; 2685 case DMBIC: 2686 outb(com->modem_ctl_port, com->mcr_image &= ~mcr); 2687 break; 2688 } 2689 com_unlock(); 2690 lwkt_reltoken(&tty_token); 2691 return (0); 2692 } 2693 2694 /* 2695 * NOTE: Must be called with tty_token held 2696 */ 2697 static void 2698 siosettimeout(void) 2699 { 2700 struct com_s *com; 2701 bool_t someopen; 2702 int unit; 2703 2704 ASSERT_LWKT_TOKEN_HELD(&tty_token); 2705 /* 2706 * Set our timeout period to 1 second if no polled devices are open. 2707 * Otherwise set it to max(1/200, 1/hz). 2708 * Enable timeouts iff some device is open. 2709 */ 2710 callout_stop(&sio_timeout_handle); 2711 sio_timeout = hz; 2712 someopen = FALSE; 2713 for (unit = 0; unit < sio_numunits; ++unit) { 2714 com = com_addr(unit); 2715 if (com != NULL && com->tp != NULL 2716 && com->tp->t_state & TS_ISOPEN && !com->gone) { 2717 someopen = TRUE; 2718 if (com->poll || com->poll_output) { 2719 sio_timeout = hz > 200 ? hz / 200 : 1; 2720 break; 2721 } 2722 } 2723 } 2724 if (someopen) { 2725 sio_timeouts_until_log = hz / sio_timeout; 2726 callout_reset(&sio_timeout_handle, sio_timeout, 2727 comwakeup, NULL); 2728 } else { 2729 /* Flush error messages, if any. */ 2730 sio_timeouts_until_log = 1; 2731 comwakeup(NULL); 2732 callout_stop(&sio_timeout_handle); 2733 } 2734 } 2735 2736 /* 2737 * NOTE: Must be called with tty_token held 2738 */ 2739 static void 2740 comwakeup(void *chan) 2741 { 2742 struct com_s *com; 2743 int unit; 2744 2745 /* 2746 * Can be called from a callout too so just get the token 2747 */ 2748 lwkt_gettoken(&tty_token); 2749 callout_reset(&sio_timeout_handle, sio_timeout, comwakeup, NULL); 2750 2751 /* 2752 * Recover from lost output interrupts. 2753 * Poll any lines that don't use interrupts. 2754 */ 2755 for (unit = 0; unit < sio_numunits; ++unit) { 2756 com = com_addr(unit); 2757 if (com != NULL && !com->gone 2758 && (com->state >= (CS_BUSY | CS_TTGO) || com->poll)) { 2759 com_lock(); 2760 siointr1(com); 2761 com_unlock(); 2762 } 2763 } 2764 2765 /* 2766 * Check for and log errors, but not too often. 2767 */ 2768 if (--sio_timeouts_until_log > 0) { 2769 lwkt_reltoken(&tty_token); 2770 return; 2771 } 2772 sio_timeouts_until_log = hz / sio_timeout; 2773 for (unit = 0; unit < sio_numunits; ++unit) { 2774 int errnum; 2775 2776 com = com_addr(unit); 2777 if (com == NULL) 2778 continue; 2779 if (com->gone) 2780 continue; 2781 for (errnum = 0; errnum < CE_NTYPES; ++errnum) { 2782 u_int delta; 2783 u_long total; 2784 2785 com_lock(); 2786 delta = com->delta_error_counts[errnum]; 2787 com->delta_error_counts[errnum] = 0; 2788 com_unlock(); 2789 if (delta == 0) 2790 continue; 2791 total = com->error_counts[errnum] += delta; 2792 log(LOG_ERR, "sio%d: %u more %s%s (total %lu)\n", 2793 unit, delta, error_desc[errnum], 2794 delta == 1 ? "" : "s", total); 2795 } 2796 } 2797 lwkt_reltoken(&tty_token); 2798 } 2799 2800 static void 2801 disc_optim(struct tty *tp, struct termios *t, struct com_s *com) 2802 { 2803 lwkt_gettoken(&tty_token); 2804 if (!(t->c_iflag & (ICRNL | IGNCR | IMAXBEL | INLCR | ISTRIP | IXON)) 2805 && (!(t->c_iflag & BRKINT) || (t->c_iflag & IGNBRK)) 2806 && (!(t->c_iflag & PARMRK) 2807 || (t->c_iflag & (IGNPAR | IGNBRK)) == (IGNPAR | IGNBRK)) 2808 && !(t->c_lflag & (ECHO | ICANON | IEXTEN | ISIG | PENDIN)) 2809 && linesw[tp->t_line].l_rint == ttyinput) 2810 tp->t_state |= TS_CAN_BYPASS_L_RINT; 2811 else 2812 tp->t_state &= ~TS_CAN_BYPASS_L_RINT; 2813 com->hotchar = linesw[tp->t_line].l_hotchar; 2814 lwkt_reltoken(&tty_token); 2815 } 2816 2817 /* 2818 * Following are all routines needed for SIO to act as console 2819 */ 2820 #include <sys/cons.h> 2821 2822 struct siocnstate { 2823 u_char dlbl; 2824 u_char dlbh; 2825 u_char ier; 2826 u_char cfcr; 2827 u_char mcr; 2828 }; 2829 2830 static speed_t siocngetspeed (Port_t, u_long rclk); 2831 #if 0 2832 static void siocnclose (struct siocnstate *sp, Port_t iobase); 2833 #endif 2834 static void siocnopen (struct siocnstate *sp, Port_t iobase, int speed); 2835 2836 static cn_probe_t siocnprobe; 2837 static cn_init_t siocninit; 2838 static cn_init_fini_t siocninit_fini; 2839 static cn_checkc_t siocncheckc; 2840 static cn_getc_t siocngetc; 2841 static cn_putc_t siocnputc; 2842 2843 #if defined(__i386__) || defined(__x86_64__) 2844 CONS_DRIVER(sio, siocnprobe, siocninit, siocninit_fini, 2845 NULL, siocngetc, siocncheckc, siocnputc, NULL, NULL); 2846 #endif 2847 2848 /* To get the GDB related variables */ 2849 #if defined(DDB) 2850 #include <ddb/ddb.h> 2851 #endif 2852 2853 static void 2854 siocntxwait(Port_t iobase) 2855 { 2856 int timo; 2857 2858 /* 2859 * Wait for any pending transmission to finish. Required to avoid 2860 * the UART lockup bug when the speed is changed, and for normal 2861 * transmits. 2862 */ 2863 timo = 100000; 2864 while ((inb(iobase + com_lsr) & (LSR_TSRE | LSR_TXRDY)) 2865 != (LSR_TSRE | LSR_TXRDY) && --timo != 0) 2866 ; 2867 } 2868 2869 /* 2870 * Read the serial port specified and try to figure out what speed 2871 * it's currently running at. We're assuming the serial port has 2872 * been initialized and is basicly idle. This routine is only intended 2873 * to be run at system startup. 2874 * 2875 * If the value read from the serial port doesn't make sense, return 0. 2876 */ 2877 /* 2878 * NOTE: Must be called with tty_token held 2879 */ 2880 static speed_t 2881 siocngetspeed(Port_t iobase, u_long rclk) 2882 { 2883 u_int divisor; 2884 u_char dlbh; 2885 u_char dlbl; 2886 u_char cfcr; 2887 2888 cfcr = inb(iobase + com_cfcr); 2889 outb(iobase + com_cfcr, CFCR_DLAB | cfcr); 2890 2891 dlbl = inb(iobase + com_dlbl); 2892 dlbh = inb(iobase + com_dlbh); 2893 2894 outb(iobase + com_cfcr, cfcr); 2895 2896 divisor = dlbh << 8 | dlbl; 2897 2898 /* XXX there should be more sanity checking. */ 2899 if (divisor == 0) 2900 return (CONSPEED); 2901 return (rclk / (16UL * divisor)); 2902 } 2903 2904 static void 2905 siocnopen(struct siocnstate *sp, Port_t iobase, int speed) 2906 { 2907 u_int divisor; 2908 u_char dlbh; 2909 u_char dlbl; 2910 2911 /* 2912 * Save all the device control registers except the fifo register 2913 * and set our default ones (cs8 -parenb speed=comdefaultrate). 2914 * We can't save the fifo register since it is read-only. 2915 */ 2916 sp->ier = inb(iobase + com_ier); 2917 outb(iobase + com_ier, 0); /* spltty() doesn't stop siointr() */ 2918 siocntxwait(iobase); 2919 sp->cfcr = inb(iobase + com_cfcr); 2920 outb(iobase + com_cfcr, CFCR_DLAB | CFCR_8BITS); 2921 sp->dlbl = inb(iobase + com_dlbl); 2922 sp->dlbh = inb(iobase + com_dlbh); 2923 /* 2924 * Only set the divisor registers if they would change, since on 2925 * some 16550 incompatibles (Startech), setting them clears the 2926 * data input register. This also reduces the effects of the 2927 * UMC8669F bug. 2928 */ 2929 divisor = siodivisor(comdefaultrclk, speed); 2930 dlbl = divisor & 0xFF; 2931 if (sp->dlbl != dlbl) 2932 outb(iobase + com_dlbl, dlbl); 2933 dlbh = divisor >> 8; 2934 if (sp->dlbh != dlbh) 2935 outb(iobase + com_dlbh, dlbh); 2936 outb(iobase + com_cfcr, CFCR_8BITS); 2937 sp->mcr = inb(iobase + com_mcr); 2938 /* 2939 * We don't want interrupts, but must be careful not to "disable" 2940 * them by clearing the MCR_IENABLE bit, since that might cause 2941 * an interrupt by floating the IRQ line. 2942 */ 2943 outb(iobase + com_mcr, (sp->mcr & MCR_IENABLE) | MCR_DTR | MCR_RTS); 2944 } 2945 2946 #if 0 2947 static void 2948 siocnclose(struct siocnstate *sp, Port_t iobase) 2949 { 2950 /* 2951 * Restore the device control registers. 2952 */ 2953 siocntxwait(iobase); 2954 outb(iobase + com_cfcr, CFCR_DLAB | CFCR_8BITS); 2955 if (sp->dlbl != inb(iobase + com_dlbl)) 2956 outb(iobase + com_dlbl, sp->dlbl); 2957 if (sp->dlbh != inb(iobase + com_dlbh)) 2958 outb(iobase + com_dlbh, sp->dlbh); 2959 outb(iobase + com_cfcr, sp->cfcr); 2960 /* 2961 * XXX damp oscillations of MCR_DTR and MCR_RTS by not restoring them. 2962 */ 2963 outb(iobase + com_mcr, sp->mcr | MCR_DTR | MCR_RTS); 2964 outb(iobase + com_ier, sp->ier); 2965 } 2966 #endif 2967 2968 static void 2969 siocnprobe(struct consdev *cp) 2970 { 2971 u_char cfcr; 2972 u_int divisor; 2973 int unit; 2974 int fn; 2975 struct siocnstate sp; 2976 2977 /* 2978 * Find our first enabled console, if any. If it is a high-level 2979 * console device, then initialize it and return successfully. 2980 * If it is a low-level console device, then initialize it and 2981 * return unsuccessfully. It must be initialized in both cases 2982 * for early use by console drivers and debuggers. Initializing 2983 * the hardware is not necessary in all cases, since the i/o 2984 * routines initialize it on the fly, but it is necessary if 2985 * input might arrive while the hardware is switched back to an 2986 * uninitialized state. We can't handle multiple console devices 2987 * yet because our low-level routines don't take a device arg. 2988 * We trust the user to set the console flags properly so that we 2989 * don't need to probe. 2990 */ 2991 cp->cn_pri = CN_DEAD; 2992 2993 for (unit = 0; unit < 16; unit++) { /* XXX need to know how many */ 2994 int flags; 2995 int disabled; 2996 2997 if (!resource_int_value("sio", unit, "disabled", &disabled)) { 2998 if (disabled) 2999 continue; 3000 } 3001 if (resource_int_value("sio", unit, "flags", &flags)) 3002 continue; 3003 if (COM_CONSOLE(flags) || COM_DEBUGGER(flags)) { 3004 int port; 3005 int baud; 3006 Port_t iobase; 3007 speed_t boot_speed; 3008 struct com_s *com; 3009 3010 /* 3011 * We need the port. For built-in serial ports 3012 * (e.g. sio0/sio1) the resources exist. For 3013 * add-on serial ports they resources might not 3014 * but the port may have been configured late 3015 * and we can find it when we re-probe. 3016 * 3017 * If the port is not specified check to see if 3018 * the device configured after the fact. 3019 */ 3020 com = com_addr(unit); 3021 if (resource_int_value("sio", unit, "port", &port)) { 3022 if (com == NULL || com->ioportres == NULL) 3023 continue; 3024 port = rman_get_bushandle(com->ioportres); 3025 } 3026 if (resource_int_value("sio", unit, "baud", &baud) == 0) 3027 boot_speed = baud; 3028 else 3029 boot_speed = 0; 3030 iobase = port; 3031 crit_enter(); 3032 if (boothowto & RB_SERIAL) { 3033 if (boot_speed == 0) { 3034 boot_speed = siocngetspeed(iobase, 3035 comdefaultrclk); 3036 } 3037 if (boot_speed) 3038 comdefaultrate = boot_speed; 3039 } 3040 if (boot_speed == 0) 3041 boot_speed = comdefaultrate; 3042 3043 /* 3044 * Initialize the divisor latch. We can't rely on 3045 * siocnopen() to do this the first time, since it 3046 * avoids writing to the latch if the latch appears 3047 * to have the correct value. Also, if we didn't 3048 * just read the speed from the hardware, then we 3049 * need to set the speed in hardware so that 3050 * switching it later is null. 3051 */ 3052 com_lock(); 3053 cfcr = inb(iobase + com_cfcr); 3054 outb(iobase + com_cfcr, CFCR_DLAB | cfcr); 3055 divisor = siodivisor(comdefaultrclk, boot_speed); 3056 outb(iobase + com_dlbl, divisor & 0xff); 3057 outb(iobase + com_dlbh, divisor >> 8); 3058 outb(iobase + com_cfcr, cfcr); 3059 3060 /* 3061 * Make sure we can drain the receiver. If we can't, 3062 * the serial port may not exist and making it the 3063 * console will implode the kernel. 3064 * 3065 * This is a failsafe, the main sio probe should have 3066 * already forced sioN.disabled to 1 and not reached 3067 * here. 3068 */ 3069 for (fn = 0; fn < 256; ++fn) { 3070 if ((inb(iobase + com_lsr) & LSR_RXRDY) == 0) 3071 break; 3072 (void)inb(iobase + com_data); 3073 } 3074 if (fn == 256) { 3075 kprintf("sio%d: does not exist, " 3076 "cannot make console\n", unit); 3077 com_unlock(); 3078 crit_exit(); 3079 continue; 3080 } 3081 3082 /* 3083 * We want ttyopen 3084 */ 3085 if (com) { 3086 com->it_in.c_iflag = TTYDEF_IFLAG; 3087 com->it_in.c_oflag = TTYDEF_OFLAG; 3088 com->it_in.c_cflag = TTYDEF_CFLAG | CLOCAL; 3089 com->it_in.c_lflag = TTYDEF_LFLAG; 3090 com->lt_out.c_cflag = com->lt_in.c_cflag = CLOCAL; 3091 com->lt_out.c_ispeed = com->lt_out.c_ospeed = 3092 com->lt_in.c_ispeed = com->lt_in.c_ospeed = 3093 com->it_in.c_ispeed = com->it_in.c_ospeed = 3094 boot_speed; 3095 } 3096 3097 siocnopen(&sp, iobase, boot_speed); 3098 com_unlock(); 3099 3100 crit_exit(); 3101 if (COM_CONSOLE(flags) && !COM_LLCONSOLE(flags)) { 3102 cp->cn_probegood = 1; 3103 cp->cn_private = (void *)(intptr_t)unit; 3104 cp->cn_pri = (COM_FORCECONSOLE(flags) 3105 || ((boothowto & RB_SERIAL)) ? 3106 CN_REMOTE : CN_NORMAL); 3107 siocniobase = iobase; 3108 siocnunit = unit; 3109 } 3110 if (COM_DEBUGGER(flags) && gdb_tab == NULL) { 3111 kprintf("sio%d: gdb debugging port\n", unit); 3112 siogdbiobase = iobase; 3113 siogdbunit = unit; 3114 #if defined(DDB) 3115 cp->cn_gdbprivate = (void *)(intptr_t)unit; 3116 gdb_tab = cp; 3117 #endif 3118 } 3119 } 3120 } 3121 #if defined(__i386__) || defined(__x86_64__) 3122 #if defined(DDB) 3123 /* 3124 * XXX Ugly Compatibility. 3125 * If no gdb port has been specified, set it to be the console 3126 * as some configuration files don't specify the gdb port. 3127 */ 3128 if (gdb_tab == NULL && (boothowto & RB_GDB)) { 3129 kprintf("Warning: no GDB port specified. Defaulting to sio%d.\n", 3130 siocnunit); 3131 kprintf("Set flag 0x80 on desired GDB port in your\n"); 3132 kprintf("configuration file (currently sio only).\n"); 3133 siogdbiobase = siocniobase; 3134 siogdbunit = siocnunit; 3135 cp->cn_gdbprivate = (void *)(intptr_t)siocnunit; 3136 gdb_tab = cp; 3137 } 3138 #endif 3139 #endif 3140 } 3141 3142 static void 3143 siocninit(struct consdev *cp) 3144 { 3145 comconsole = (int)(intptr_t)cp->cn_private; 3146 } 3147 3148 static void 3149 siocninit_fini(struct consdev *cp) 3150 { 3151 cdev_t dev; 3152 char tbuf[MAKEDEV_MINNBUF]; 3153 int unit; 3154 3155 if (cp->cn_probegood) { 3156 unit = (int)(intptr_t)cp->cn_private; 3157 3158 /* 3159 * Call devfs_find_device_by_name on ttydX to find the correct 3160 * device, as it should have been created already at this 3161 * point by the attach routine. 3162 * 3163 * If it isn't found, the serial port was not attached at all 3164 * and we shouldn't be here, so assert this case. 3165 */ 3166 dev = devfs_find_device_by_name("ttyd%s", 3167 makedev_unit_b32(tbuf, unit)); 3168 3169 KKASSERT(dev != NULL); 3170 cp->cn_dev = dev; 3171 } 3172 } 3173 3174 static int 3175 siocncheckc(void *private) 3176 { 3177 int c; 3178 int unit = (int)(intptr_t)private; 3179 Port_t iobase; 3180 #if 0 3181 struct siocnstate sp; 3182 #endif 3183 3184 if (unit == siogdbunit) 3185 iobase = siogdbiobase; 3186 else 3187 iobase = siocniobase; 3188 crit_enter(); 3189 com_lock(); 3190 #if 0 3191 siocnopen(&sp, iobase, comdefaultrate); 3192 #endif 3193 if (inb(iobase + com_lsr) & LSR_RXRDY) 3194 c = inb(iobase + com_data); 3195 else 3196 c = -1; 3197 #if 0 3198 siocnclose(&sp, iobase); 3199 #endif 3200 com_unlock(); 3201 crit_exit(); 3202 3203 return (c); 3204 } 3205 3206 3207 static int 3208 siocngetc(void *private) 3209 { 3210 int c; 3211 int unit = (int)(intptr_t)private; 3212 Port_t iobase; 3213 #if 0 3214 struct siocnstate sp; 3215 #endif 3216 3217 if (unit == siogdbunit) 3218 iobase = siogdbiobase; 3219 else 3220 iobase = siocniobase; 3221 crit_enter(); 3222 com_lock(); 3223 #if 0 3224 siocnopen(&sp, iobase, comdefaultrate); 3225 #endif 3226 while (!(inb(iobase + com_lsr) & LSR_RXRDY)) 3227 ; 3228 c = inb(iobase + com_data); 3229 #if 0 3230 siocnclose(&sp, iobase); 3231 #endif 3232 com_unlock(); 3233 crit_exit(); 3234 return (c); 3235 } 3236 3237 static void 3238 siocnputc(void *private, int c) 3239 { 3240 int unit = (int)(intptr_t)private; 3241 #if 0 3242 struct siocnstate sp; 3243 #endif 3244 Port_t iobase; 3245 3246 if (unit == siogdbunit) 3247 iobase = siogdbiobase; 3248 else 3249 iobase = siocniobase; 3250 crit_enter(); 3251 com_lock(); 3252 #if 0 3253 siocnopen(&sp, iobase, comdefaultrate); 3254 #endif 3255 siocntxwait(iobase); 3256 outb(iobase + com_data, c); 3257 #if 0 3258 siocnclose(&sp, iobase); 3259 #endif 3260 com_unlock(); 3261 crit_exit(); 3262 } 3263 3264 DRIVER_MODULE(sio, isa, sio_isa_driver, sio_devclass, NULL, NULL); 3265 DRIVER_MODULE(sio, acpi, sio_isa_driver, sio_devclass, NULL, NULL); 3266 #if NPCI > 0 3267 DRIVER_MODULE(sio, pci, sio_pci_driver, sio_devclass, NULL, NULL); 3268 #endif 3269 #if NPUC > 0 3270 DRIVER_MODULE(sio, puc, sio_puc_driver, sio_devclass, NULL, NULL); 3271 #endif 3272