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