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. All advertising materials mentioning features or use of this software 16 * must display the following acknowledgement: 17 * This product includes software developed by the University of 18 * California, Berkeley and its contributors. 19 * 4. Neither the name of the University nor the names of its contributors 20 * may be used to endorse or promote products derived from this software 21 * without specific prior written permission. 22 * 23 * THIS SOFTWARE IS PROVIDED BY THE REGENTS AND CONTRIBUTORS ``AS IS'' AND 24 * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE 25 * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE 26 * ARE DISCLAIMED. IN NO EVENT SHALL THE REGENTS OR CONTRIBUTORS BE LIABLE 27 * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL 28 * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS 29 * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) 30 * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT 31 * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY 32 * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF 33 * SUCH DAMAGE. 34 * 35 * $FreeBSD: src/sys/isa/sio.c,v 1.291.2.35 2003/05/18 08:51:15 murray Exp $ 36 * $DragonFly: src/sys/dev/serial/sio/sio.c,v 1.44 2008/07/23 16:39:33 dillon Exp $ 37 * from: @(#)com.c 7.5 (Berkeley) 5/16/91 38 * from: i386/isa sio.c,v 1.234 39 */ 40 41 #include "opt_comconsole.h" 42 #include "opt_compat.h" 43 #include "opt_ddb.h" 44 #include "opt_sio.h" 45 #include "use_pci.h" 46 #ifdef __i386__ 47 #include "use_puc.h" 48 #endif 49 #include "use_sio.h" 50 51 /* 52 * Serial driver, based on 386BSD-0.1 com driver. 53 * Mostly rewritten to use pseudo-DMA. 54 * Works for National Semiconductor NS8250-NS16550AF UARTs. 55 * COM driver, based on HP dca driver. 56 * 57 * Changes for PC-Card integration: 58 * - Added PC-Card driver table and handlers 59 */ 60 #include <sys/param.h> 61 #include <sys/systm.h> 62 #include <sys/reboot.h> 63 #include <sys/malloc.h> 64 #include <sys/tty.h> 65 #include <sys/proc.h> 66 #include <sys/priv.h> 67 #include <sys/module.h> 68 #include <sys/conf.h> 69 #include <sys/dkstat.h> 70 #include <sys/fcntl.h> 71 #include <sys/interrupt.h> 72 #include <sys/kernel.h> 73 #include <sys/syslog.h> 74 #include <sys/sysctl.h> 75 #include <sys/bus.h> 76 #include <sys/rman.h> 77 #include <sys/timepps.h> 78 #include <sys/thread2.h> 79 #include <sys/devfs.h> 80 81 #include <machine/limits.h> 82 83 #include <bus/isa/isareg.h> 84 #include <bus/isa/isavar.h> 85 #if NPCI > 0 86 #include <bus/pci/pcireg.h> 87 #include <bus/pci/pcivar.h> 88 #endif 89 #if NPUC > 0 90 #include <dev/misc/puc/pucvar.h> 91 #endif 92 #include <machine/lock.h> 93 94 #include <machine/clock.h> 95 #ifndef SMP 96 #include <machine/lock.h> 97 #endif 98 99 #include "sioreg.h" 100 #include "sio_private.h" 101 102 #ifdef COM_ESP 103 #include "../ic_layer/esp.h" 104 #endif 105 106 #define LOTS_OF_EVENTS 64 /* helps separate urgent events from input */ 107 108 #define CALLOUT_MASK 0x80 109 #define CONTROL_MASK 0x60 110 #define CONTROL_INIT_STATE 0x20 111 #define CONTROL_LOCK_STATE 0x40 112 #define DEV_TO_UNIT(dev) (MINOR_TO_UNIT(minor(dev))) 113 #define MINOR_TO_UNIT(mynor) ((((mynor) & ~0xffffU) >> (8 + 3)) \ 114 | ((mynor) & 0x1f)) 115 #define UNIT_TO_MINOR(unit) ((((unit) & ~0x1fU) << (8 + 3)) \ 116 | ((unit) & 0x1f)) 117 118 #define com_scr 7 /* scratch register for 16450-16550 (R/W) */ 119 120 #define sio_getreg(com, off) \ 121 (bus_space_read_1((com)->bst, (com)->bsh, (off))) 122 #define sio_setreg(com, off, value) \ 123 (bus_space_write_1((com)->bst, (com)->bsh, (off), (value))) 124 125 /* 126 * com state bits. 127 * (CS_BUSY | CS_TTGO) and (CS_BUSY | CS_TTGO | CS_ODEVREADY) must be higher 128 * than the other bits so that they can be tested as a group without masking 129 * off the low bits. 130 * 131 * The following com and tty flags correspond closely: 132 * CS_BUSY = TS_BUSY (maintained by comstart(), siopoll() and 133 * comstop()) 134 * CS_TTGO = ~TS_TTSTOP (maintained by comparam() and comstart()) 135 * CS_CTS_OFLOW = CCTS_OFLOW (maintained by comparam()) 136 * CS_RTS_IFLOW = CRTS_IFLOW (maintained by comparam()) 137 * TS_FLUSH is not used. 138 * XXX I think TIOCSETA doesn't clear TS_TTSTOP when it clears IXON. 139 * XXX CS_*FLOW should be CF_*FLOW in com->flags (control flags not state). 140 */ 141 #define CS_BUSY 0x80 /* output in progress */ 142 #define CS_TTGO 0x40 /* output not stopped by XOFF */ 143 #define CS_ODEVREADY 0x20 /* external device h/w ready (CTS) */ 144 #define CS_CHECKMSR 1 /* check of MSR scheduled */ 145 #define CS_CTS_OFLOW 2 /* use CTS output flow control */ 146 #define CS_DTR_OFF 0x10 /* DTR held off */ 147 #define CS_ODONE 4 /* output completed */ 148 #define CS_RTS_IFLOW 8 /* use RTS input flow control */ 149 #define CSE_BUSYCHECK 1 /* siobusycheck() scheduled */ 150 151 static char const * const error_desc[] = { 152 #define CE_OVERRUN 0 153 "silo overflow", 154 #define CE_INTERRUPT_BUF_OVERFLOW 1 155 "interrupt-level buffer overflow", 156 #define CE_TTY_BUF_OVERFLOW 2 157 "tty-level buffer overflow", 158 }; 159 160 #ifdef COM_ESP 161 static int espattach (struct com_s *com, Port_t esp_port); 162 #endif 163 static int sio_isa_attach (device_t dev); 164 165 static timeout_t siobusycheck; 166 static u_int siodivisor (u_long rclk, speed_t speed); 167 static timeout_t siodtrwakeup; 168 static void comhardclose (struct com_s *com); 169 static void sioinput (struct com_s *com); 170 static void siointr1 (struct com_s *com); 171 static void siointr (void *arg); 172 static int commctl (struct com_s *com, int bits, int how); 173 static int comparam (struct tty *tp, struct termios *t); 174 static inthand2_t siopoll; 175 static int sio_isa_probe (device_t dev); 176 static void siosettimeout (void); 177 static int siosetwater (struct com_s *com, speed_t speed); 178 static void comstart (struct tty *tp); 179 static void comstop (struct tty *tp, int rw); 180 static timeout_t comwakeup; 181 static void disc_optim (struct tty *tp, struct termios *t, 182 struct com_s *com); 183 184 #if NPCI > 0 185 static int sio_pci_attach (device_t dev); 186 static void sio_pci_kludge_unit (device_t dev); 187 static int sio_pci_probe (device_t dev); 188 #endif /* NPCI > 0 */ 189 190 #if NPUC > 0 191 static int sio_puc_attach (device_t dev); 192 static int sio_puc_probe (device_t dev); 193 #endif /* NPUC > 0 */ 194 195 static char driver_name[] = "sio"; 196 197 /* table and macro for fast conversion from a unit number to its com struct */ 198 devclass_t sio_devclass; 199 #define com_addr(unit) ((struct com_s *) \ 200 devclass_get_softc(sio_devclass, unit)) 201 202 static device_method_t sio_isa_methods[] = { 203 /* Device interface */ 204 DEVMETHOD(device_probe, sio_isa_probe), 205 DEVMETHOD(device_attach, sio_isa_attach), 206 207 { 0, 0 } 208 }; 209 210 static driver_t sio_isa_driver = { 211 driver_name, 212 sio_isa_methods, 213 sizeof(struct com_s), 214 }; 215 216 #if NPCI > 0 217 static device_method_t sio_pci_methods[] = { 218 /* Device interface */ 219 DEVMETHOD(device_probe, sio_pci_probe), 220 DEVMETHOD(device_attach, sio_pci_attach), 221 222 { 0, 0 } 223 }; 224 225 static driver_t sio_pci_driver = { 226 driver_name, 227 sio_pci_methods, 228 sizeof(struct com_s), 229 }; 230 #endif /* NPCI > 0 */ 231 232 #if NPUC > 0 233 static device_method_t sio_puc_methods[] = { 234 /* Device interface */ 235 DEVMETHOD(device_probe, sio_puc_probe), 236 DEVMETHOD(device_attach, sio_puc_attach), 237 238 { 0, 0 } 239 }; 240 241 static driver_t sio_puc_driver = { 242 driver_name, 243 sio_puc_methods, 244 sizeof(struct com_s), 245 }; 246 #endif /* NPUC > 0 */ 247 248 static d_open_t sioopen; 249 static d_close_t sioclose; 250 static d_read_t sioread; 251 static d_write_t siowrite; 252 static d_ioctl_t sioioctl; 253 254 #define CDEV_MAJOR 28 255 static struct dev_ops sio_ops = { 256 { driver_name, CDEV_MAJOR, D_TTY }, 257 .d_open = sioopen, 258 .d_close = sioclose, 259 .d_read = sioread, 260 .d_write = siowrite, 261 .d_ioctl = sioioctl, 262 .d_kqfilter = ttykqfilter, 263 .d_revoke = ttyrevoke 264 }; 265 266 int comconsole = -1; 267 static volatile speed_t comdefaultrate = CONSPEED; 268 static u_long comdefaultrclk = DEFAULT_RCLK; 269 SYSCTL_ULONG(_machdep, OID_AUTO, conrclk, CTLFLAG_RW, &comdefaultrclk, 0, ""); 270 static u_int com_events; /* input chars + weighted output completions */ 271 static Port_t siocniobase; 272 static int siocnunit; 273 static Port_t siogdbiobase; 274 static int siogdbunit = -1; 275 static bool_t sio_registered; 276 static int sio_timeout; 277 static int sio_timeouts_until_log; 278 static struct callout sio_timeout_handle; 279 static int sio_numunits; 280 281 #ifdef COM_ESP 282 /* XXX configure this properly. */ 283 static Port_t likely_com_ports[] = { 0x3f8, 0x2f8, 0x3e8, 0x2e8, }; 284 static Port_t likely_esp_ports[] = { 0x140, 0x180, 0x280, 0 }; 285 #endif 286 287 /* 288 * handle sysctl read/write requests for console speed 289 * 290 * In addition to setting comdefaultrate for I/O through /dev/console, 291 * also set the initial and lock values for the /dev/ttyXX device 292 * if there is one associated with the console. Finally, if the /dev/tty 293 * device has already been open, change the speed on the open running port 294 * itself. 295 */ 296 297 static int 298 sysctl_machdep_comdefaultrate(SYSCTL_HANDLER_ARGS) 299 { 300 int error; 301 speed_t newspeed; 302 struct com_s *com; 303 struct tty *tp; 304 305 lwkt_gettoken(&tty_token); 306 newspeed = comdefaultrate; 307 308 error = sysctl_handle_opaque(oidp, &newspeed, sizeof newspeed, req); 309 if (error || !req->newptr) { 310 lwkt_reltoken(&tty_token); 311 return (error); 312 } 313 314 comdefaultrate = newspeed; 315 316 if (comconsole < 0) { /* serial console not selected? */ 317 lwkt_reltoken(&tty_token); 318 return (0); 319 } 320 321 com = com_addr(comconsole); 322 if (com == NULL) { 323 lwkt_reltoken(&tty_token); 324 return (ENXIO); 325 } 326 327 /* 328 * set the initial and lock rates for /dev/ttydXX and /dev/cuaXX 329 * (note, the lock rates really are boolean -- if non-zero, disallow 330 * speed changes) 331 */ 332 com->it_in.c_ispeed = com->it_in.c_ospeed = 333 com->lt_in.c_ispeed = com->lt_in.c_ospeed = 334 com->it_out.c_ispeed = com->it_out.c_ospeed = 335 com->lt_out.c_ispeed = com->lt_out.c_ospeed = comdefaultrate; 336 337 /* 338 * if we're open, change the running rate too 339 */ 340 tp = com->tp; 341 if (tp && (tp->t_state & TS_ISOPEN)) { 342 tp->t_termios.c_ispeed = 343 tp->t_termios.c_ospeed = comdefaultrate; 344 crit_enter(); 345 error = comparam(tp, &tp->t_termios); 346 crit_exit(); 347 } 348 lwkt_reltoken(&tty_token); 349 return error; 350 } 351 352 SYSCTL_PROC(_machdep, OID_AUTO, conspeed, CTLTYPE_INT | CTLFLAG_RW, 353 0, 0, sysctl_machdep_comdefaultrate, "I", ""); 354 355 #if NPCI > 0 356 struct pci_ids { 357 u_int32_t type; 358 const char *desc; 359 int rid; 360 }; 361 362 static struct pci_ids pci_ids[] = { 363 { 0x100812b9, "3COM PCI FaxModem", 0x10 }, 364 { 0x2000131f, "CyberSerial (1-port) 16550", 0x10 }, 365 { 0x01101407, "Koutech IOFLEX-2S PCI Dual Port Serial", 0x10 }, 366 { 0x01111407, "Koutech IOFLEX-2S PCI Dual Port Serial", 0x10 }, 367 { 0x048011c1, "Lucent kermit based PCI Modem", 0x14 }, 368 { 0x95211415, "Oxford Semiconductor PCI Dual Port Serial", 0x10 }, 369 { 0x7101135e, "SeaLevel Ultra 530.PCI Single Port Serial", 0x18 }, 370 { 0x0000151f, "SmartLink 5634PCV SurfRider", 0x10 }, 371 { 0x98459710, "Netmos Nm9845 PCI Bridge with Dual UART", 0x10 }, 372 { 0x00000000, NULL, 0 } 373 }; 374 375 static int 376 sio_pci_attach(device_t dev) 377 { 378 u_int32_t type; 379 struct pci_ids *id; 380 381 type = pci_get_devid(dev); 382 id = pci_ids; 383 while (id->type && id->type != type) 384 id++; 385 if (id->desc == NULL) 386 return (ENXIO); 387 sio_pci_kludge_unit(dev); 388 return (sioattach(dev, id->rid, 0UL)); 389 } 390 391 /* 392 * Don't cut and paste this to other drivers. It is a horrible kludge 393 * which will fail to work and also be unnecessary in future versions. 394 */ 395 static void 396 sio_pci_kludge_unit(device_t dev) 397 { 398 devclass_t dc; 399 int err; 400 int start; 401 int unit; 402 403 unit = 0; 404 start = 0; 405 while (resource_int_value("sio", unit, "port", &start) == 0 && 406 start > 0) 407 unit++; 408 if (device_get_unit(dev) < unit) { 409 dc = device_get_devclass(dev); 410 while (devclass_get_device(dc, unit)) 411 unit++; 412 device_printf(dev, "moving to sio%d\n", unit); 413 err = device_set_unit(dev, unit); /* EVIL DO NOT COPY */ 414 if (err) 415 device_printf(dev, "error moving device %d\n", err); 416 } 417 } 418 419 static int 420 sio_pci_probe(device_t dev) 421 { 422 u_int32_t type; 423 struct pci_ids *id; 424 425 type = pci_get_devid(dev); 426 id = pci_ids; 427 while (id->type && id->type != type) 428 id++; 429 if (id->desc == NULL) 430 return (ENXIO); 431 device_set_desc(dev, id->desc); 432 return (sioprobe(dev, id->rid, 0UL)); 433 } 434 #endif /* NPCI > 0 */ 435 436 #if NPUC > 0 437 static int 438 sio_puc_attach(device_t dev) 439 { 440 u_int rclk; 441 442 if (BUS_READ_IVAR(device_get_parent(dev), dev, PUC_IVAR_FREQ, 443 &rclk) != 0) 444 rclk = DEFAULT_RCLK; 445 return (sioattach(dev, 0, rclk)); 446 } 447 448 static int 449 sio_puc_probe(device_t dev) 450 { 451 u_int rclk; 452 453 if (BUS_READ_IVAR(device_get_parent(dev), dev, PUC_IVAR_FREQ, 454 &rclk) != 0) 455 rclk = DEFAULT_RCLK; 456 return (sioprobe(dev, 0, rclk)); 457 } 458 #endif /* NPUC */ 459 460 static struct isa_pnp_id sio_ids[] = { 461 {0x0005d041, "Standard PC COM port"}, /* PNP0500 */ 462 {0x0105d041, "16550A-compatible COM port"}, /* PNP0501 */ 463 {0x0205d041, "Multiport serial device (non-intelligent 16550)"}, /* PNP0502 */ 464 {0x1005d041, "Generic IRDA-compatible device"}, /* PNP0510 */ 465 {0x1105d041, "Generic IRDA-compatible device"}, /* PNP0511 */ 466 /* Devices that do not have a compatid */ 467 {0x12206804, NULL}, /* ACH2012 - 5634BTS 56K Video Ready Modem */ 468 {0x7602a904, NULL}, /* AEI0276 - 56K v.90 Fax Modem (LKT) */ 469 {0x00007905, NULL}, /* AKY0000 - 56K Plug&Play Modem */ 470 {0x21107905, NULL}, /* AKY1021 - 56K Plug&Play Modem */ 471 {0x01405407, NULL}, /* AZT4001 - AZT3000 PnP SOUND DEVICE, MODEM */ 472 {0x56039008, NULL}, /* BDP0356 - Best Data 56x2 */ 473 {0x56159008, NULL}, /* BDP1556 - B.D. Smart One 56SPS,Voice Modem*/ 474 {0x36339008, NULL}, /* BDP3336 - Best Data Prods. 336F */ 475 {0x0014490a, NULL}, /* BRI1400 - Boca 33.6 PnP */ 476 {0x0015490a, NULL}, /* BRI1500 - Internal Fax Data */ 477 {0x0034490a, NULL}, /* BRI3400 - Internal ACF Modem */ 478 {0x0094490a, NULL}, /* BRI9400 - Boca K56Flex PnP */ 479 {0x00b4490a, NULL}, /* BRIB400 - Boca 56k PnP */ 480 {0x0030320d, NULL}, /* CIR3000 - Cirrus Logic V43 */ 481 {0x0100440e, NULL}, /* CRD0001 - Cardinal MVP288IV ? */ 482 {0x01308c0e, NULL}, /* CTL3001 - Creative Labs Phoneblaster */ 483 {0x36033610, NULL}, /* DAV0336 - DAVICOM 336PNP MODEM */ 484 {0x01009416, NULL}, /* ETT0001 - E-Tech Bullet 33k6 PnP */ 485 {0x0000aa1a, NULL}, /* FUJ0000 - FUJITSU Modem 33600 PNP/I2 */ 486 {0x1200c31e, NULL}, /* GVC0012 - VF1128HV-R9 (win modem?) */ 487 {0x0303c31e, NULL}, /* GVC0303 - MaxTech 33.6 PnP D/F/V */ 488 {0x0505c31e, NULL}, /* GVC0505 - GVC 56k Faxmodem */ 489 {0x0116c31e, NULL}, /* GVC1601 - Rockwell V.34 Plug & Play Modem */ 490 {0x0050c31e, NULL}, /* GVC5000 - some GVC modem */ 491 {0x3800f91e, NULL}, /* GWY0038 - Telepath with v.90 */ 492 {0x9062f91e, NULL}, /* GWY6290 - Telepath with x2 Technology */ 493 {0x8100e425, NULL}, /* IOD0081 - I-O DATA DEVICE,INC. IFML-560 */ 494 {0x21002534, NULL}, /* MAE0021 - Jetstream Int V.90 56k Voice Series 2*/ 495 {0x0000f435, NULL}, /* MOT0000 - Motorola ModemSURFR 33.6 Intern */ 496 {0x5015f435, NULL}, /* MOT1550 - Motorola ModemSURFR 56K Modem */ 497 {0xf015f435, NULL}, /* MOT15F0 - Motorola VoiceSURFR 56K Modem */ 498 {0x6045f435, NULL}, /* MOT4560 - Motorola ? */ 499 {0x61e7a338, NULL}, /* NECE761 - 33.6Modem */ 500 {0x08804f3f, NULL}, /* OZO8008 - Zoom (33.6k Modem) */ 501 {0x0f804f3f, NULL}, /* OZO800f - Zoom 2812 (56k Modem) */ 502 {0x39804f3f, NULL}, /* OZO8039 - Zoom 56k flex */ 503 {0x00914f3f, NULL}, /* OZO9100 - Zoom 2919 (K56 Faxmodem) */ 504 {0x3024a341, NULL}, /* PMC2430 - Pace 56 Voice Internal Modem */ 505 {0x1000eb49, NULL}, /* ROK0010 - Rockwell ? */ 506 {0x1200b23d, NULL}, /* RSS0012 - OMRON ME5614ISA */ 507 {0x5002734a, NULL}, /* RSS0250 - 5614Jx3(G) Internal Modem */ 508 {0x6202734a, NULL}, /* RSS0262 - 5614Jx3[G] V90+K56Flex Modem */ 509 {0x1010104d, NULL}, /* SHP1010 - Rockwell 33600bps Modem */ 510 {0xc100ad4d, NULL}, /* SMM00C1 - Leopard 56k PnP */ 511 {0x9012b04e, NULL}, /* SUP1290 - Supra ? */ 512 {0x1013b04e, NULL}, /* SUP1310 - SupraExpress 336i PnP */ 513 {0x8013b04e, NULL}, /* SUP1380 - SupraExpress 288i PnP Voice */ 514 {0x8113b04e, NULL}, /* SUP1381 - SupraExpress 336i PnP Voice */ 515 {0x5016b04e, NULL}, /* SUP1650 - Supra 336i Sp Intl */ 516 {0x7016b04e, NULL}, /* SUP1670 - Supra 336i V+ Intl */ 517 {0x7420b04e, NULL}, /* SUP2070 - Supra ? */ 518 {0x8020b04e, NULL}, /* SUP2080 - Supra ? */ 519 {0x8420b04e, NULL}, /* SUP2084 - SupraExpress 56i PnP */ 520 {0x7121b04e, NULL}, /* SUP2171 - SupraExpress 56i Sp? */ 521 {0x8024b04e, NULL}, /* SUP2480 - Supra ? */ 522 {0x01007256, NULL}, /* USR0001 - U.S. Robotics Inc., Sportster W */ 523 {0x02007256, NULL}, /* USR0002 - U.S. Robotics Inc. Sportster 33. */ 524 {0x04007256, NULL}, /* USR0004 - USR Sportster 14.4k */ 525 {0x06007256, NULL}, /* USR0006 - USR Sportster 33.6k */ 526 {0x11007256, NULL}, /* USR0011 - USR ? */ 527 {0x01017256, NULL}, /* USR0101 - USR ? */ 528 {0x30207256, NULL}, /* USR2030 - U.S.Robotics Inc. Sportster 560 */ 529 {0x50207256, NULL}, /* USR2050 - U.S.Robotics Inc. Sportster 33. */ 530 {0x70207256, NULL}, /* USR2070 - U.S.Robotics Inc. Sportster 560 */ 531 {0x30307256, NULL}, /* USR3030 - U.S. Robotics 56K FAX INT */ 532 {0x31307256, NULL}, /* USR3031 - U.S. Robotics 56K FAX INT */ 533 {0x50307256, NULL}, /* USR3050 - U.S. Robotics 56K FAX INT */ 534 {0x70307256, NULL}, /* USR3070 - U.S. Robotics 56K Voice INT */ 535 {0x90307256, NULL}, /* USR3090 - USR ? */ 536 {0x70917256, NULL}, /* USR9170 - U.S. Robotics 56K FAX INT */ 537 {0x90917256, NULL}, /* USR9190 - USR 56k Voice INT */ 538 {0x0300695c, NULL}, /* WCI0003 - Fax/Voice/Modem/Speakphone/Asvd */ 539 {0x01a0896a, NULL}, /* ZTIA001 - Zoom Internal V90 Faxmodem */ 540 {0x61f7896a, NULL}, /* ZTIF761 - Zoom ComStar 33.6 */ 541 {0} 542 }; 543 544 545 546 static int 547 sio_isa_probe(device_t dev) 548 { 549 /* Check isapnp ids */ 550 if (ISA_PNP_PROBE(device_get_parent(dev), dev, sio_ids) == ENXIO) 551 return (ENXIO); 552 return (sioprobe(dev, 0, 0UL)); 553 } 554 555 int 556 sioprobe(device_t dev, int xrid, u_long rclk) 557 { 558 #if 0 559 static bool_t already_init; 560 device_t xdev; 561 #endif 562 struct com_s *com; 563 u_int divisor; 564 bool_t failures[10]; 565 int fn; 566 device_t idev; 567 Port_t iobase; 568 intrmask_t irqmap[4]; 569 intrmask_t irqs; 570 u_char mcr_image; 571 int result; 572 u_long xirq; 573 u_int flags = device_get_flags(dev); 574 int rid; 575 struct resource *port; 576 577 rid = xrid; 578 port = bus_alloc_resource(dev, SYS_RES_IOPORT, &rid, 579 0, ~0, IO_COMSIZE, RF_ACTIVE); 580 if (!port) 581 return (ENXIO); 582 583 lwkt_gettoken(&tty_token); 584 com = device_get_softc(dev); 585 com->bst = rman_get_bustag(port); 586 com->bsh = rman_get_bushandle(port); 587 if (rclk == 0) 588 rclk = DEFAULT_RCLK; 589 com->rclk = rclk; 590 591 #if 0 592 /* 593 * XXX this is broken - when we are first called, there are no 594 * previously configured IO ports. We could hard code 595 * 0x3f8, 0x2f8, 0x3e8, 0x2e8 etc but that's probably worse. 596 * This code has been doing nothing since the conversion since 597 * "count" is zero the first time around. 598 */ 599 if (!already_init) { 600 /* 601 * Turn off MCR_IENABLE for all likely serial ports. An unused 602 * port with its MCR_IENABLE gate open will inhibit interrupts 603 * from any used port that shares the interrupt vector. 604 * XXX the gate enable is elsewhere for some multiports. 605 */ 606 device_t *devs; 607 int count, i, xioport; 608 609 devclass_get_devices(sio_devclass, &devs, &count); 610 for (i = 0; i < count; i++) { 611 xdev = devs[i]; 612 if (device_is_enabled(xdev) && 613 bus_get_resource(xdev, SYS_RES_IOPORT, 0, &xioport, 614 NULL) == 0) 615 outb(xioport + com_mcr, 0); 616 } 617 kfree(devs, M_TEMP); 618 already_init = TRUE; 619 } 620 #endif 621 622 if (COM_LLCONSOLE(flags)) { 623 kprintf("sio%d: reserved for low-level i/o\n", 624 device_get_unit(dev)); 625 bus_release_resource(dev, SYS_RES_IOPORT, rid, port); 626 lwkt_reltoken(&tty_token); 627 return (ENXIO); 628 } 629 630 /* 631 * If the device is on a multiport card and has an AST/4 632 * compatible interrupt control register, initialize this 633 * register and prepare to leave MCR_IENABLE clear in the mcr. 634 * Otherwise, prepare to set MCR_IENABLE in the mcr. 635 * Point idev to the device struct giving the correct id_irq. 636 * This is the struct for the master device if there is one. 637 */ 638 idev = dev; 639 mcr_image = MCR_IENABLE; 640 #ifdef COM_MULTIPORT 641 if (COM_ISMULTIPORT(flags)) { 642 Port_t xiobase; 643 u_long io; 644 645 idev = devclass_get_device(sio_devclass, COM_MPMASTER(flags)); 646 if (idev == NULL) { 647 kprintf("sio%d: master device %d not configured\n", 648 device_get_unit(dev), COM_MPMASTER(flags)); 649 idev = dev; 650 } 651 if (!COM_NOTAST4(flags)) { 652 if (bus_get_resource(idev, SYS_RES_IOPORT, 0, &io, 653 NULL) == 0) { 654 xiobase = io; 655 if (bus_get_resource(idev, SYS_RES_IRQ, 0, 656 NULL, NULL) == 0) 657 outb(xiobase + com_scr, 0x80); 658 else 659 outb(xiobase + com_scr, 0); 660 } 661 mcr_image = 0; 662 } 663 } 664 #endif /* COM_MULTIPORT */ 665 if (bus_get_resource(idev, SYS_RES_IRQ, 0, NULL, NULL) != 0) 666 mcr_image = 0; 667 668 bzero(failures, sizeof failures); 669 iobase = rman_get_start(port); 670 671 /* 672 * We don't want to get actual interrupts, just masked ones. 673 * Interrupts from this line should already be masked in the ICU, 674 * but mask them in the processor as well in case there are some 675 * (misconfigured) shared interrupts. 676 */ 677 com_lock(); 678 /* EXTRA DELAY? */ 679 680 /* 681 * For the TI16754 chips, set prescaler to 1 (4 is often the 682 * default after-reset value) as otherwise it's impossible to 683 * get highest baudrates. 684 */ 685 if (COM_TI16754(flags)) { 686 u_char cfcr, efr; 687 688 cfcr = sio_getreg(com, com_cfcr); 689 sio_setreg(com, com_cfcr, CFCR_EFR_ENABLE); 690 efr = sio_getreg(com, com_efr); 691 /* Unlock extended features to turn off prescaler. */ 692 sio_setreg(com, com_efr, efr | EFR_EFE); 693 /* Disable EFR. */ 694 sio_setreg(com, com_cfcr, (cfcr != CFCR_EFR_ENABLE) ? cfcr : 0); 695 /* Turn off prescaler. */ 696 sio_setreg(com, com_mcr, 697 sio_getreg(com, com_mcr) & ~MCR_PRESCALE); 698 sio_setreg(com, com_cfcr, CFCR_EFR_ENABLE); 699 sio_setreg(com, com_efr, efr); 700 sio_setreg(com, com_cfcr, cfcr); 701 } 702 703 /* 704 * Initialize the speed and the word size and wait long enough to 705 * drain the maximum of 16 bytes of junk in device output queues. 706 * The speed is undefined after a master reset and must be set 707 * before relying on anything related to output. There may be 708 * junk after a (very fast) soft reboot and (apparently) after 709 * master reset. 710 * XXX what about the UART bug avoided by waiting in comparam()? 711 * We don't want to to wait long enough to drain at 2 bps. 712 */ 713 if (iobase == siocniobase) { 714 DELAY((16 + 1) * 1000000 / (comdefaultrate / 10)); 715 } else { 716 sio_setreg(com, com_cfcr, CFCR_DLAB | CFCR_8BITS); 717 divisor = siodivisor(rclk, SIO_TEST_SPEED); 718 sio_setreg(com, com_dlbl, divisor & 0xff); 719 sio_setreg(com, com_dlbh, divisor >> 8); 720 sio_setreg(com, com_cfcr, CFCR_8BITS); 721 DELAY((16 + 1) * 1000000 / (SIO_TEST_SPEED / 10)); 722 } 723 724 /* 725 * Make sure we can drain the receiver. If we can't, the serial 726 * port may not exist. 727 */ 728 for (fn = 0; fn < 256; ++fn) { 729 if ((sio_getreg(com, com_lsr) & LSR_RXRDY) == 0) 730 break; 731 (void)sio_getreg(com, com_data); 732 } 733 if (fn == 256) { 734 kprintf("sio%d: can't drain, serial port might " 735 "not exist, disabling\n", device_get_unit(dev)); 736 com_unlock(); 737 lwkt_reltoken(&tty_token); 738 return (ENXIO); 739 } 740 741 /* 742 * Enable the interrupt gate and disable device interupts. This 743 * should leave the device driving the interrupt line low and 744 * guarantee an edge trigger if an interrupt can be generated. 745 */ 746 /* EXTRA DELAY? */ 747 sio_setreg(com, com_mcr, mcr_image); 748 sio_setreg(com, com_ier, 0); 749 DELAY(1000); /* XXX */ 750 irqmap[0] = isa_irq_pending(); 751 752 /* 753 * Attempt to set loopback mode so that we can send a null byte 754 * without annoying any external device. 755 */ 756 /* EXTRA DELAY? */ 757 sio_setreg(com, com_mcr, mcr_image | MCR_LOOPBACK); 758 759 /* 760 * Attempt to generate an output interrupt. On 8250's, setting 761 * IER_ETXRDY generates an interrupt independent of the current 762 * setting and independent of whether the THR is empty. On 16450's, 763 * setting IER_ETXRDY generates an interrupt independent of the 764 * current setting. On 16550A's, setting IER_ETXRDY only 765 * generates an interrupt when IER_ETXRDY is not already set. 766 */ 767 sio_setreg(com, com_ier, IER_ETXRDY); 768 769 /* 770 * On some 16x50 incompatibles, setting IER_ETXRDY doesn't generate 771 * an interrupt. They'd better generate one for actually doing 772 * output. Loopback may be broken on the same incompatibles but 773 * it's unlikely to do more than allow the null byte out. 774 */ 775 sio_setreg(com, com_data, 0); 776 DELAY((1 + 2) * 1000000 / (SIO_TEST_SPEED / 10)); 777 778 /* 779 * Turn off loopback mode so that the interrupt gate works again 780 * (MCR_IENABLE was hidden). This should leave the device driving 781 * an interrupt line high. It doesn't matter if the interrupt 782 * line oscillates while we are not looking at it, since interrupts 783 * are disabled. 784 */ 785 /* EXTRA DELAY? */ 786 sio_setreg(com, com_mcr, mcr_image); 787 788 /* 789 * Some pcmcia cards have the "TXRDY bug", so we check everyone 790 * for IIR_TXRDY implementation ( Palido 321s, DC-1S... ) 791 */ 792 if (COM_NOPROBE(flags)) { 793 /* Reading IIR register twice */ 794 for (fn = 0; fn < 2; fn ++) { 795 DELAY(10000); 796 failures[6] = sio_getreg(com, com_iir); 797 } 798 /* Check IIR_TXRDY clear ? */ 799 result = 0; 800 if (failures[6] & IIR_TXRDY) { 801 /* Nop, Double check with clearing IER */ 802 sio_setreg(com, com_ier, 0); 803 if (sio_getreg(com, com_iir) & IIR_NOPEND) { 804 /* Ok. we're familia this gang */ 805 SET_FLAG(dev, COM_C_IIR_TXRDYBUG); 806 } else { 807 /* Unknown, Just omit this chip.. XXX */ 808 result = ENXIO; 809 sio_setreg(com, com_mcr, 0); 810 } 811 } else { 812 /* OK. this is well-known guys */ 813 CLR_FLAG(dev, COM_C_IIR_TXRDYBUG); 814 } 815 sio_setreg(com, com_ier, 0); 816 sio_setreg(com, com_cfcr, CFCR_8BITS); 817 com_unlock(); 818 bus_release_resource(dev, SYS_RES_IOPORT, rid, port); 819 lwkt_reltoken(&tty_token); 820 return (iobase == siocniobase ? 0 : result); 821 } 822 823 /* 824 * Check that 825 * o the CFCR, IER and MCR in UART hold the values written to them 826 * (the values happen to be all distinct - this is good for 827 * avoiding false positive tests from bus echoes). 828 * o an output interrupt is generated and its vector is correct. 829 * o the interrupt goes away when the IIR in the UART is read. 830 */ 831 /* EXTRA DELAY? */ 832 failures[0] = sio_getreg(com, com_cfcr) - CFCR_8BITS; 833 failures[1] = sio_getreg(com, com_ier) - IER_ETXRDY; 834 failures[2] = sio_getreg(com, com_mcr) - mcr_image; 835 DELAY(10000); /* Some internal modems need this time */ 836 irqmap[1] = isa_irq_pending(); 837 failures[4] = (sio_getreg(com, com_iir) & IIR_IMASK) - IIR_TXRDY; 838 DELAY(1000); /* XXX */ 839 irqmap[2] = isa_irq_pending(); 840 failures[6] = (sio_getreg(com, com_iir) & IIR_IMASK) - IIR_NOPEND; 841 842 /* 843 * Turn off all device interrupts and check that they go off properly. 844 * Leave MCR_IENABLE alone. For ports without a master port, it gates 845 * the OUT2 output of the UART to 846 * the ICU input. Closing the gate would give a floating ICU input 847 * (unless there is another device driving it) and spurious interrupts. 848 * (On the system that this was first tested on, the input floats high 849 * and gives a (masked) interrupt as soon as the gate is closed.) 850 */ 851 sio_setreg(com, com_ier, 0); 852 sio_setreg(com, com_cfcr, CFCR_8BITS); /* dummy to avoid bus echo */ 853 failures[7] = sio_getreg(com, com_ier); 854 DELAY(1000); /* XXX */ 855 irqmap[3] = isa_irq_pending(); 856 failures[9] = (sio_getreg(com, com_iir) & IIR_IMASK) - IIR_NOPEND; 857 858 com_unlock(); 859 860 irqs = irqmap[1] & ~irqmap[0]; 861 if (bus_get_resource(idev, SYS_RES_IRQ, 0, &xirq, NULL) == 0 && 862 ((1 << xirq) & irqs) == 0) 863 kprintf( 864 "sio%d: configured irq %ld not in bitmap of probed irqs %#x\n", 865 device_get_unit(dev), xirq, irqs); 866 if (bootverbose) 867 kprintf("sio%d: irq maps: %#x %#x %#x %#x\n", 868 device_get_unit(dev), 869 irqmap[0], irqmap[1], irqmap[2], irqmap[3]); 870 871 result = 0; 872 for (fn = 0; fn < sizeof failures; ++fn) 873 if (failures[fn]) { 874 sio_setreg(com, com_mcr, 0); 875 result = ENXIO; 876 if (bootverbose) { 877 kprintf("sio%d: probe failed test(s):", 878 device_get_unit(dev)); 879 for (fn = 0; fn < sizeof failures; ++fn) 880 if (failures[fn]) 881 kprintf(" %d", fn); 882 kprintf("\n"); 883 } 884 break; 885 } 886 bus_release_resource(dev, SYS_RES_IOPORT, rid, port); 887 lwkt_reltoken(&tty_token); 888 return (iobase == siocniobase ? 0 : result); 889 } 890 891 #ifdef COM_ESP 892 static int 893 espattach(struct com_s *com, Port_t esp_port) 894 { 895 u_char dips; 896 u_char val; 897 898 /* 899 * Check the ESP-specific I/O port to see if we're an ESP 900 * card. If not, return failure immediately. 901 */ 902 if ((inb(esp_port) & 0xf3) == 0) { 903 kprintf(" port 0x%x is not an ESP board?\n", esp_port); 904 return (0); 905 } 906 907 lwkt_gettoken(&tty_token); 908 /* 909 * We've got something that claims to be a Hayes ESP card. 910 * Let's hope so. 911 */ 912 913 /* Get the dip-switch configuration */ 914 outb(esp_port + ESP_CMD1, ESP_GETDIPS); 915 dips = inb(esp_port + ESP_STATUS1); 916 917 /* 918 * Bits 0,1 of dips say which COM port we are. 919 */ 920 if (rman_get_start(com->ioportres) == likely_com_ports[dips & 0x03]) 921 kprintf(" : ESP"); 922 else { 923 kprintf(" esp_port has com %d\n", dips & 0x03); 924 lwkt_reltoken(&tty_token); 925 return (0); 926 } 927 928 /* 929 * Check for ESP version 2.0 or later: bits 4,5,6 = 010. 930 */ 931 outb(esp_port + ESP_CMD1, ESP_GETTEST); 932 val = inb(esp_port + ESP_STATUS1); /* clear reg 1 */ 933 val = inb(esp_port + ESP_STATUS2); 934 if ((val & 0x70) < 0x20) { 935 kprintf("-old (%o)", val & 0x70); 936 lwkt_reltoken(&tty_token); 937 return (0); 938 } 939 940 /* 941 * Check for ability to emulate 16550: bit 7 == 1 942 */ 943 if ((dips & 0x80) == 0) { 944 kprintf(" slave"); 945 lwkt_reltoken(&tty_token); 946 return (0); 947 } 948 949 /* 950 * Okay, we seem to be a Hayes ESP card. Whee. 951 */ 952 com->esp = TRUE; 953 com->esp_port = esp_port; 954 lwkt_reltoken(&tty_token); 955 return (1); 956 } 957 #endif /* COM_ESP */ 958 959 static int 960 sio_isa_attach(device_t dev) 961 { 962 return (sioattach(dev, 0, 0UL)); 963 } 964 965 int 966 sioattach(device_t dev, int xrid, u_long rclk) 967 { 968 struct com_s *com; 969 #ifdef COM_ESP 970 Port_t *espp; 971 #endif 972 Port_t iobase; 973 int minorbase; 974 int unit; 975 u_int flags; 976 int rid; 977 struct resource *port; 978 int ret; 979 static int did_init; 980 981 lwkt_gettoken(&tty_token); 982 if (did_init == 0) { 983 did_init = 1; 984 callout_init_mp(&sio_timeout_handle); 985 } 986 987 rid = xrid; 988 port = bus_alloc_resource(dev, SYS_RES_IOPORT, &rid, 989 0, ~0, IO_COMSIZE, RF_ACTIVE); 990 if (!port) { 991 lwkt_reltoken(&tty_token); 992 return (ENXIO); 993 } 994 995 iobase = rman_get_start(port); 996 unit = device_get_unit(dev); 997 com = device_get_softc(dev); 998 flags = device_get_flags(dev); 999 1000 if (unit >= sio_numunits) 1001 sio_numunits = unit + 1; 1002 /* 1003 * sioprobe() has initialized the device registers as follows: 1004 * o cfcr = CFCR_8BITS. 1005 * It is most important that CFCR_DLAB is off, so that the 1006 * data port is not hidden when we enable interrupts. 1007 * o ier = 0. 1008 * Interrupts are only enabled when the line is open. 1009 * o mcr = MCR_IENABLE, or 0 if the port has AST/4 compatible 1010 * interrupt control register or the config specifies no irq. 1011 * Keeping MCR_DTR and MCR_RTS off might stop the external 1012 * device from sending before we are ready. 1013 */ 1014 bzero(com, sizeof *com); 1015 com->unit = unit; 1016 com->ioportres = port; 1017 com->bst = rman_get_bustag(port); 1018 com->bsh = rman_get_bushandle(port); 1019 com->cfcr_image = CFCR_8BITS; 1020 com->dtr_wait = 3 * hz; 1021 callout_init_mp(&com->dtr_ch); 1022 callout_init_mp(&com->busy_ch); 1023 com->loses_outints = COM_LOSESOUTINTS(flags) != 0; 1024 com->no_irq = bus_get_resource(dev, SYS_RES_IRQ, 0, NULL, NULL) != 0; 1025 com->tx_fifo_size = 1; 1026 com->obufs[0].l_head = com->obuf1; 1027 com->obufs[1].l_head = com->obuf2; 1028 1029 com->data_port = iobase + com_data; 1030 com->int_id_port = iobase + com_iir; 1031 com->modem_ctl_port = iobase + com_mcr; 1032 com->mcr_image = inb(com->modem_ctl_port); 1033 com->line_status_port = iobase + com_lsr; 1034 com->modem_status_port = iobase + com_msr; 1035 com->intr_ctl_port = iobase + com_ier; 1036 1037 if (rclk == 0) 1038 rclk = DEFAULT_RCLK; 1039 com->rclk = rclk; 1040 1041 /* 1042 * We don't use all the flags from <sys/ttydefaults.h> since they 1043 * are only relevant for logins. It's important to have echo off 1044 * initially so that the line doesn't start blathering before the 1045 * echo flag can be turned off. 1046 */ 1047 com->it_in.c_iflag = 0; 1048 com->it_in.c_oflag = 0; 1049 com->it_in.c_cflag = TTYDEF_CFLAG; 1050 com->it_in.c_lflag = 0; 1051 if (unit == comconsole) { 1052 com->it_in.c_iflag = TTYDEF_IFLAG; 1053 com->it_in.c_oflag = TTYDEF_OFLAG; 1054 com->it_in.c_cflag = TTYDEF_CFLAG | CLOCAL; 1055 com->it_in.c_lflag = TTYDEF_LFLAG; 1056 com->lt_out.c_cflag = com->lt_in.c_cflag = CLOCAL; 1057 com->lt_out.c_ispeed = com->lt_out.c_ospeed = 1058 com->lt_in.c_ispeed = com->lt_in.c_ospeed = 1059 com->it_in.c_ispeed = com->it_in.c_ospeed = comdefaultrate; 1060 } else 1061 com->it_in.c_ispeed = com->it_in.c_ospeed = TTYDEF_SPEED; 1062 if (siosetwater(com, com->it_in.c_ispeed) != 0) { 1063 com_unlock(); 1064 /* 1065 * Leave i/o resources allocated if this is a `cn'-level 1066 * console, so that other devices can't snarf them. 1067 */ 1068 if (iobase != siocniobase) 1069 bus_release_resource(dev, SYS_RES_IOPORT, rid, port); 1070 lwkt_reltoken(&tty_token); 1071 return (ENOMEM); 1072 } 1073 com_unlock(); 1074 termioschars(&com->it_in); 1075 com->it_out = com->it_in; 1076 1077 /* attempt to determine UART type */ 1078 kprintf("sio%d: type", unit); 1079 1080 1081 #ifdef COM_MULTIPORT 1082 if (!COM_ISMULTIPORT(flags) && !COM_IIR_TXRDYBUG(flags)) 1083 #else 1084 if (!COM_IIR_TXRDYBUG(flags)) 1085 #endif 1086 { 1087 u_char scr; 1088 u_char scr1; 1089 u_char scr2; 1090 1091 scr = sio_getreg(com, com_scr); 1092 sio_setreg(com, com_scr, 0xa5); 1093 scr1 = sio_getreg(com, com_scr); 1094 sio_setreg(com, com_scr, 0x5a); 1095 scr2 = sio_getreg(com, com_scr); 1096 sio_setreg(com, com_scr, scr); 1097 if (scr1 != 0xa5 || scr2 != 0x5a) { 1098 kprintf(" 8250"); 1099 goto determined_type; 1100 } 1101 } 1102 sio_setreg(com, com_fifo, FIFO_ENABLE | FIFO_RX_HIGH); 1103 DELAY(100); 1104 com->st16650a = 0; 1105 switch (inb(com->int_id_port) & IIR_FIFO_MASK) { 1106 case FIFO_RX_LOW: 1107 kprintf(" 16450"); 1108 break; 1109 case FIFO_RX_MEDL: 1110 kprintf(" 16450?"); 1111 break; 1112 case FIFO_RX_MEDH: 1113 kprintf(" 16550?"); 1114 break; 1115 case FIFO_RX_HIGH: 1116 if (COM_NOFIFO(flags)) { 1117 kprintf(" 16550A fifo disabled"); 1118 } else { 1119 com->hasfifo = TRUE; 1120 if (COM_ST16650A(flags)) { 1121 com->st16650a = 1; 1122 com->tx_fifo_size = 32; 1123 kprintf(" ST16650A"); 1124 } else if (COM_TI16754(flags)) { 1125 com->tx_fifo_size = 64; 1126 kprintf(" TI16754"); 1127 } else { 1128 com->tx_fifo_size = COM_FIFOSIZE(flags); 1129 kprintf(" 16550A"); 1130 } 1131 } 1132 #ifdef COM_ESP 1133 for (espp = likely_esp_ports; *espp != 0; espp++) 1134 if (espattach(com, *espp)) { 1135 com->tx_fifo_size = 1024; 1136 break; 1137 } 1138 #endif 1139 if (!com->st16650a && !COM_TI16754(flags)) { 1140 if (!com->tx_fifo_size) 1141 com->tx_fifo_size = 16; 1142 else 1143 kprintf(" lookalike with %d bytes FIFO", 1144 com->tx_fifo_size); 1145 } 1146 1147 break; 1148 } 1149 1150 #ifdef COM_ESP 1151 if (com->esp) { 1152 /* 1153 * Set 16550 compatibility mode. 1154 * We don't use the ESP_MODE_SCALE bit to increase the 1155 * fifo trigger levels because we can't handle large 1156 * bursts of input. 1157 * XXX flow control should be set in comparam(), not here. 1158 */ 1159 outb(com->esp_port + ESP_CMD1, ESP_SETMODE); 1160 outb(com->esp_port + ESP_CMD2, ESP_MODE_RTS | ESP_MODE_FIFO); 1161 1162 /* Set RTS/CTS flow control. */ 1163 outb(com->esp_port + ESP_CMD1, ESP_SETFLOWTYPE); 1164 outb(com->esp_port + ESP_CMD2, ESP_FLOW_RTS); 1165 outb(com->esp_port + ESP_CMD2, ESP_FLOW_CTS); 1166 1167 /* Set flow-control levels. */ 1168 outb(com->esp_port + ESP_CMD1, ESP_SETRXFLOW); 1169 outb(com->esp_port + ESP_CMD2, HIBYTE(768)); 1170 outb(com->esp_port + ESP_CMD2, LOBYTE(768)); 1171 outb(com->esp_port + ESP_CMD2, HIBYTE(512)); 1172 outb(com->esp_port + ESP_CMD2, LOBYTE(512)); 1173 } 1174 #endif /* COM_ESP */ 1175 sio_setreg(com, com_fifo, 0); 1176 determined_type: ; 1177 1178 #ifdef COM_MULTIPORT 1179 if (COM_ISMULTIPORT(flags)) { 1180 device_t masterdev; 1181 1182 com->multiport = TRUE; 1183 kprintf(" (multiport"); 1184 if (unit == COM_MPMASTER(flags)) 1185 kprintf(" master"); 1186 kprintf(")"); 1187 masterdev = devclass_get_device(sio_devclass, 1188 COM_MPMASTER(flags)); 1189 com->no_irq = (masterdev == NULL || bus_get_resource(masterdev, 1190 SYS_RES_IRQ, 0, NULL, NULL) != 0); 1191 } 1192 #endif /* COM_MULTIPORT */ 1193 if (unit == comconsole) 1194 kprintf(", console"); 1195 if (COM_IIR_TXRDYBUG(flags)) 1196 kprintf(" with a bogus IIR_TXRDY register"); 1197 kprintf("\n"); 1198 1199 if (!sio_registered) { 1200 register_swi(SWI_TTY, siopoll, NULL ,"swi_siopoll", NULL); 1201 sio_registered = TRUE; 1202 } 1203 minorbase = UNIT_TO_MINOR(unit); 1204 make_dev(&sio_ops, minorbase, 1205 UID_ROOT, GID_WHEEL, 0600, "ttyd%r", unit); 1206 make_dev(&sio_ops, minorbase | CONTROL_INIT_STATE, 1207 UID_ROOT, GID_WHEEL, 0600, "ttyid%r", unit); 1208 make_dev(&sio_ops, minorbase | CONTROL_LOCK_STATE, 1209 UID_ROOT, GID_WHEEL, 0600, "ttyld%r", unit); 1210 make_dev(&sio_ops, minorbase | CALLOUT_MASK, 1211 UID_UUCP, GID_DIALER, 0660, "cuaa%r", unit); 1212 make_dev(&sio_ops, minorbase | CALLOUT_MASK | CONTROL_INIT_STATE, 1213 UID_UUCP, GID_DIALER, 0660, "cuaia%r", unit); 1214 make_dev(&sio_ops, minorbase | CALLOUT_MASK | CONTROL_LOCK_STATE, 1215 UID_UUCP, GID_DIALER, 0660, "cuala%r", unit); 1216 com->flags = flags; 1217 com->pps.ppscap = PPS_CAPTUREASSERT | PPS_CAPTURECLEAR; 1218 pps_init(&com->pps); 1219 1220 rid = 0; 1221 com->irqres = bus_alloc_resource(dev, SYS_RES_IRQ, &rid, 0ul, ~0ul, 1, 1222 RF_ACTIVE); 1223 if (com->irqres) { 1224 ret = BUS_SETUP_INTR(device_get_parent(dev), dev, 1225 com->irqres, INTR_MPSAFE, siointr, com, 1226 &com->cookie, NULL); 1227 if (ret) 1228 device_printf(dev, "could not activate interrupt\n"); 1229 #if defined(DDB) && (defined(BREAK_TO_DEBUGGER) || \ 1230 defined(ALT_BREAK_TO_DEBUGGER)) 1231 /* 1232 * Enable interrupts for early break-to-debugger support 1233 * on the console. 1234 */ 1235 if (ret == 0 && unit == comconsole) 1236 outb(siocniobase + com_ier, IER_ERXRDY | IER_ERLS | 1237 IER_EMSC); 1238 #endif 1239 } 1240 1241 lwkt_reltoken(&tty_token); 1242 return (0); 1243 } 1244 1245 static int 1246 sioopen(struct dev_open_args *ap) 1247 { 1248 cdev_t dev = ap->a_head.a_dev; 1249 struct com_s *com; 1250 int error; 1251 int mynor; 1252 struct tty *tp; 1253 int unit; 1254 1255 mynor = minor(dev); 1256 unit = MINOR_TO_UNIT(mynor); 1257 com = com_addr(unit); 1258 if (com == NULL) 1259 return (ENXIO); 1260 if (com->gone) 1261 return (ENXIO); 1262 if (mynor & CONTROL_MASK) 1263 return (0); 1264 lwkt_gettoken(&tty_token); 1265 tp = dev->si_tty = com->tp = ttymalloc(com->tp); 1266 crit_enter(); 1267 /* 1268 * We jump to this label after all non-interrupted sleeps to pick 1269 * up any changes of the device state. 1270 */ 1271 open_top: 1272 while (com->state & CS_DTR_OFF) { 1273 error = tsleep(&com->dtr_wait, PCATCH, "siodtr", 0); 1274 if (com_addr(unit) == NULL) { 1275 crit_exit(); 1276 lwkt_reltoken(&tty_token); 1277 return (ENXIO); 1278 } 1279 if (error != 0 || com->gone) 1280 goto out; 1281 } 1282 if (tp->t_state & TS_ISOPEN) { 1283 /* 1284 * The device is open, so everything has been initialized. 1285 * Handle conflicts. 1286 */ 1287 if (mynor & CALLOUT_MASK) { 1288 if (!com->active_out) { 1289 error = EBUSY; 1290 goto out; 1291 } 1292 } else { 1293 if (com->active_out) { 1294 if (ap->a_oflags & O_NONBLOCK) { 1295 error = EBUSY; 1296 goto out; 1297 } 1298 error = tsleep(&com->active_out, 1299 PCATCH, "siobi", 0); 1300 if (com_addr(unit) == NULL) { 1301 crit_exit(); 1302 lwkt_reltoken(&tty_token); 1303 return (ENXIO); 1304 } 1305 if (error != 0 || com->gone) 1306 goto out; 1307 goto open_top; 1308 } 1309 } 1310 if (tp->t_state & TS_XCLUDE && priv_check_cred(ap->a_cred, PRIV_ROOT, 0)) { 1311 error = EBUSY; 1312 goto out; 1313 } 1314 } else { 1315 /* 1316 * The device isn't open, so there are no conflicts. 1317 * Initialize it. Initialization is done twice in many 1318 * cases: to preempt sleeping callin opens if we are 1319 * callout, and to complete a callin open after DCD rises. 1320 */ 1321 tp->t_oproc = comstart; 1322 tp->t_param = comparam; 1323 tp->t_stop = comstop; 1324 tp->t_dev = dev; 1325 tp->t_termios = mynor & CALLOUT_MASK 1326 ? com->it_out : com->it_in; 1327 (void)commctl(com, TIOCM_DTR | TIOCM_RTS, DMSET); 1328 com->poll = com->no_irq; 1329 com->poll_output = com->loses_outints; 1330 ++com->wopeners; 1331 error = comparam(tp, &tp->t_termios); 1332 --com->wopeners; 1333 if (error != 0) 1334 goto out; 1335 /* 1336 * XXX we should goto open_top if comparam() slept. 1337 */ 1338 if (com->hasfifo) { 1339 /* 1340 * (Re)enable and drain fifos. 1341 * 1342 * Certain SMC chips cause problems if the fifos 1343 * are enabled while input is ready. Turn off the 1344 * fifo if necessary to clear the input. We test 1345 * the input ready bit after enabling the fifos 1346 * since we've already enabled them in comparam() 1347 * and to handle races between enabling and fresh 1348 * input. 1349 */ 1350 while (TRUE) { 1351 sio_setreg(com, com_fifo, 1352 FIFO_RCV_RST | FIFO_XMT_RST 1353 | com->fifo_image); 1354 /* 1355 * XXX the delays are for superstitious 1356 * historical reasons. It must be less than 1357 * the character time at the maximum 1358 * supported speed (87 usec at 115200 bps 1359 * 8N1). Otherwise we might loop endlessly 1360 * if data is streaming in. We used to use 1361 * delays of 100. That usually worked 1362 * because DELAY(100) used to usually delay 1363 * for about 85 usec instead of 100. 1364 */ 1365 DELAY(50); 1366 if (!(inb(com->line_status_port) & LSR_RXRDY)) 1367 break; 1368 sio_setreg(com, com_fifo, 0); 1369 DELAY(50); 1370 (void) inb(com->data_port); 1371 } 1372 } 1373 1374 com_lock(); 1375 (void) inb(com->line_status_port); 1376 (void) inb(com->data_port); 1377 com->prev_modem_status = com->last_modem_status 1378 = inb(com->modem_status_port); 1379 if (COM_IIR_TXRDYBUG(com->flags)) { 1380 outb(com->intr_ctl_port, IER_ERXRDY | IER_ERLS 1381 | IER_EMSC); 1382 } else { 1383 outb(com->intr_ctl_port, IER_ERXRDY | IER_ETXRDY 1384 | IER_ERLS | IER_EMSC); 1385 } 1386 com_unlock(); 1387 /* 1388 * Handle initial DCD. Callout devices get a fake initial 1389 * DCD (trapdoor DCD). If we are callout, then any sleeping 1390 * callin opens get woken up and resume sleeping on "siobi" 1391 * instead of "siodcd". 1392 */ 1393 /* 1394 * XXX `mynor & CALLOUT_MASK' should be 1395 * `tp->t_cflag & (SOFT_CARRIER | TRAPDOOR_CARRIER) where 1396 * TRAPDOOR_CARRIER is the default initial state for callout 1397 * devices and SOFT_CARRIER is like CLOCAL except it hides 1398 * the true carrier. 1399 */ 1400 if (com->prev_modem_status & MSR_DCD || mynor & CALLOUT_MASK) 1401 (*linesw[tp->t_line].l_modem)(tp, 1); 1402 } 1403 /* 1404 * Wait for DCD if necessary. 1405 */ 1406 if (!(tp->t_state & TS_CARR_ON) && !(mynor & CALLOUT_MASK) 1407 && !(tp->t_cflag & CLOCAL) && !(ap->a_oflags & O_NONBLOCK)) { 1408 ++com->wopeners; 1409 error = tsleep(TSA_CARR_ON(tp), PCATCH, "siodcd", 0); 1410 if (com_addr(unit) == NULL) { 1411 crit_exit(); 1412 lwkt_reltoken(&tty_token); 1413 return (ENXIO); 1414 } 1415 --com->wopeners; 1416 if (error != 0 || com->gone) 1417 goto out; 1418 goto open_top; 1419 } 1420 error = (*linesw[tp->t_line].l_open)(dev, tp); 1421 disc_optim(tp, &tp->t_termios, com); 1422 if (tp->t_state & TS_ISOPEN && mynor & CALLOUT_MASK) 1423 com->active_out = TRUE; 1424 siosettimeout(); 1425 out: 1426 crit_exit(); 1427 if (!(tp->t_state & TS_ISOPEN) && com->wopeners == 0) 1428 comhardclose(com); 1429 lwkt_reltoken(&tty_token); 1430 return (error); 1431 } 1432 1433 static int 1434 sioclose(struct dev_close_args *ap) 1435 { 1436 cdev_t dev = ap->a_head.a_dev; 1437 struct com_s *com; 1438 int mynor; 1439 struct tty *tp; 1440 1441 mynor = minor(dev); 1442 if (mynor & CONTROL_MASK) 1443 return (0); 1444 lwkt_gettoken(&tty_token); 1445 com = com_addr(MINOR_TO_UNIT(mynor)); 1446 if (com == NULL) { 1447 lwkt_reltoken(&tty_token); 1448 return (ENODEV); 1449 } 1450 tp = com->tp; 1451 crit_enter(); 1452 (*linesw[tp->t_line].l_close)(tp, ap->a_fflag); 1453 disc_optim(tp, &tp->t_termios, com); 1454 comstop(tp, FREAD | FWRITE); 1455 comhardclose(com); 1456 ttyclose(tp); 1457 siosettimeout(); 1458 crit_exit(); 1459 if (com->gone) { 1460 kprintf("sio%d: gone\n", com->unit); 1461 crit_enter(); 1462 if (com->ibuf != NULL) 1463 kfree(com->ibuf, M_DEVBUF); 1464 bzero(tp, sizeof *tp); 1465 crit_exit(); 1466 } 1467 lwkt_reltoken(&tty_token); 1468 return (0); 1469 } 1470 1471 static void 1472 comhardclose(struct com_s *com) 1473 { 1474 struct tty *tp; 1475 int unit; 1476 1477 unit = com->unit; 1478 crit_enter(); 1479 lwkt_gettoken(&tty_token); 1480 com->poll = FALSE; 1481 com->poll_output = FALSE; 1482 com->do_timestamp = FALSE; 1483 com->do_dcd_timestamp = FALSE; 1484 com->pps.ppsparam.mode = 0; 1485 sio_setreg(com, com_cfcr, com->cfcr_image &= ~CFCR_SBREAK); 1486 tp = com->tp; 1487 1488 #if defined(DDB) && (defined(BREAK_TO_DEBUGGER) || \ 1489 defined(ALT_BREAK_TO_DEBUGGER)) 1490 /* 1491 * Leave interrupts enabled and don't clear DTR if this is the 1492 * console. This allows us to detect break-to-debugger events 1493 * while the console device is closed. 1494 */ 1495 if (com->unit != comconsole) 1496 #endif 1497 { 1498 sio_setreg(com, com_ier, 0); 1499 if (tp->t_cflag & HUPCL 1500 /* 1501 * XXX we will miss any carrier drop between here and the 1502 * next open. Perhaps we should watch DCD even when the 1503 * port is closed; it is not sufficient to check it at 1504 * the next open because it might go up and down while 1505 * we're not watching. 1506 */ 1507 || (!com->active_out 1508 && !(com->prev_modem_status & MSR_DCD) 1509 && !(com->it_in.c_cflag & CLOCAL)) 1510 || !(tp->t_state & TS_ISOPEN)) { 1511 (void)commctl(com, TIOCM_DTR, DMBIC); 1512 if (com->dtr_wait != 0 && !(com->state & CS_DTR_OFF)) { 1513 callout_reset(&com->dtr_ch, com->dtr_wait, 1514 siodtrwakeup, com); 1515 com->state |= CS_DTR_OFF; 1516 } 1517 } 1518 } 1519 if (com->hasfifo) { 1520 /* 1521 * Disable fifos so that they are off after controlled 1522 * reboots. Some BIOSes fail to detect 16550s when the 1523 * fifos are enabled. 1524 */ 1525 sio_setreg(com, com_fifo, 0); 1526 } 1527 com->active_out = FALSE; 1528 wakeup(&com->active_out); 1529 wakeup(TSA_CARR_ON(tp)); /* restart any wopeners */ 1530 lwkt_reltoken(&tty_token); 1531 crit_exit(); 1532 } 1533 1534 static int 1535 sioread(struct dev_read_args *ap) 1536 { 1537 cdev_t dev = ap->a_head.a_dev; 1538 int mynor, ret; 1539 struct com_s *com; 1540 1541 lwkt_gettoken(&tty_token); 1542 mynor = minor(dev); 1543 if (mynor & CONTROL_MASK) { 1544 lwkt_reltoken(&tty_token); 1545 return (ENODEV); 1546 } 1547 com = com_addr(MINOR_TO_UNIT(mynor)); 1548 if (com == NULL || com->gone) { 1549 lwkt_reltoken(&tty_token); 1550 return (ENODEV); 1551 } 1552 ret = ((*linesw[com->tp->t_line].l_read)(com->tp, ap->a_uio, ap->a_ioflag)); 1553 lwkt_reltoken(&tty_token); 1554 return ret; 1555 } 1556 1557 static int 1558 siowrite(struct dev_write_args *ap) 1559 { 1560 cdev_t dev = ap->a_head.a_dev; 1561 int mynor; 1562 struct com_s *com; 1563 int unit, ret; 1564 1565 lwkt_gettoken(&tty_token); 1566 mynor = minor(dev); 1567 if (mynor & CONTROL_MASK) { 1568 lwkt_reltoken(&tty_token); 1569 return (ENODEV); 1570 } 1571 1572 unit = MINOR_TO_UNIT(mynor); 1573 com = com_addr(unit); 1574 if (com == NULL || com->gone) { 1575 lwkt_reltoken(&tty_token); 1576 return (ENODEV); 1577 } 1578 /* 1579 * (XXX) We disallow virtual consoles if the physical console is 1580 * a serial port. This is in case there is a display attached that 1581 * is not the console. In that situation we don't need/want the X 1582 * server taking over the console. 1583 */ 1584 if (constty != NULL && unit == comconsole) 1585 constty = NULL; 1586 ret = ((*linesw[com->tp->t_line].l_write)(com->tp, ap->a_uio, ap->a_ioflag)); 1587 lwkt_reltoken(&tty_token); 1588 return ret; 1589 } 1590 1591 static void 1592 siobusycheck(void *chan) 1593 { 1594 struct com_s *com; 1595 1596 lwkt_gettoken(&tty_token); 1597 com = (struct com_s *)chan; 1598 1599 /* 1600 * Clear TS_BUSY if low-level output is complete. 1601 * spl locking is sufficient because siointr1() does not set CS_BUSY. 1602 * If siointr1() clears CS_BUSY after we look at it, then we'll get 1603 * called again. Reading the line status port outside of siointr1() 1604 * is safe because CS_BUSY is clear so there are no output interrupts 1605 * to lose. 1606 */ 1607 crit_enter(); 1608 if (com->state & CS_BUSY) 1609 com->extra_state &= ~CSE_BUSYCHECK; /* False alarm. */ 1610 else if ((inb(com->line_status_port) & (LSR_TSRE | LSR_TXRDY)) 1611 == (LSR_TSRE | LSR_TXRDY)) { 1612 com->tp->t_state &= ~TS_BUSY; 1613 ttwwakeup(com->tp); 1614 com->extra_state &= ~CSE_BUSYCHECK; 1615 } else { 1616 callout_reset(&com->busy_ch, hz / 100, siobusycheck, com); 1617 } 1618 crit_exit(); 1619 lwkt_reltoken(&tty_token); 1620 } 1621 1622 static u_int 1623 siodivisor(u_long rclk, speed_t speed) 1624 { 1625 long actual_speed; 1626 u_int divisor; 1627 int error; 1628 1629 if (speed == 0 || speed > ((speed_t)-1 - 1) / 8) 1630 return (0); 1631 divisor = (rclk / (8UL * speed) + 1) / 2; 1632 if (divisor == 0 || divisor >= 65536) 1633 return (0); 1634 actual_speed = rclk / (16UL * divisor); 1635 1636 /* 10 times error in percent: */ 1637 error = ((actual_speed - (long)speed) * 2000 / (long)speed + 1) / 2; 1638 1639 /* 3.0% maximum error tolerance: */ 1640 if (error < -30 || error > 30) 1641 return (0); 1642 1643 return (divisor); 1644 } 1645 1646 static void 1647 siodtrwakeup(void *chan) 1648 { 1649 struct com_s *com; 1650 1651 lwkt_gettoken(&tty_token); 1652 com = (struct com_s *)chan; 1653 com->state &= ~CS_DTR_OFF; 1654 wakeup(&com->dtr_wait); 1655 lwkt_reltoken(&tty_token); 1656 } 1657 1658 /* 1659 * NOTE: Must be called with tty_token held 1660 */ 1661 static void 1662 sioinput(struct com_s *com) 1663 { 1664 u_char *buf; 1665 int incc; 1666 u_char line_status; 1667 int recv_data; 1668 struct tty *tp; 1669 1670 ASSERT_LWKT_TOKEN_HELD(&tty_token); 1671 buf = com->ibuf; 1672 tp = com->tp; 1673 if (!(tp->t_state & TS_ISOPEN) || !(tp->t_cflag & CREAD)) { 1674 com_events -= (com->iptr - com->ibuf); 1675 com->iptr = com->ibuf; 1676 return; 1677 } 1678 if (tp->t_state & TS_CAN_BYPASS_L_RINT) { 1679 /* 1680 * Avoid the grotesquely inefficient lineswitch routine 1681 * (ttyinput) in "raw" mode. It usually takes about 450 1682 * instructions (that's without canonical processing or echo!). 1683 * slinput is reasonably fast (usually 40 instructions plus 1684 * call overhead). 1685 */ 1686 do { 1687 com_unlock(); 1688 incc = com->iptr - buf; 1689 if (tp->t_rawq.c_cc + incc > tp->t_ihiwat 1690 && (com->state & CS_RTS_IFLOW 1691 || tp->t_iflag & IXOFF) 1692 && !(tp->t_state & TS_TBLOCK)) 1693 ttyblock(tp); 1694 com->delta_error_counts[CE_TTY_BUF_OVERFLOW] 1695 += b_to_q((char *)buf, incc, &tp->t_rawq); 1696 buf += incc; 1697 tk_nin += incc; 1698 tk_rawcc += incc; 1699 tp->t_rawcc += incc; 1700 ttwakeup(tp); 1701 if (tp->t_state & TS_TTSTOP 1702 && (tp->t_iflag & IXANY 1703 || tp->t_cc[VSTART] == tp->t_cc[VSTOP])) { 1704 tp->t_state &= ~TS_TTSTOP; 1705 tp->t_lflag &= ~FLUSHO; 1706 comstart(tp); 1707 } 1708 com_lock(); 1709 } while (buf < com->iptr); 1710 } else { 1711 do { 1712 com_unlock(); 1713 line_status = buf[com->ierroff]; 1714 recv_data = *buf++; 1715 if (line_status 1716 & (LSR_BI | LSR_FE | LSR_OE | LSR_PE)) { 1717 if (line_status & LSR_BI) 1718 recv_data |= TTY_BI; 1719 if (line_status & LSR_FE) 1720 recv_data |= TTY_FE; 1721 if (line_status & LSR_OE) 1722 recv_data |= TTY_OE; 1723 if (line_status & LSR_PE) 1724 recv_data |= TTY_PE; 1725 } 1726 (*linesw[tp->t_line].l_rint)(recv_data, tp); 1727 com_lock(); 1728 } while (buf < com->iptr); 1729 } 1730 com_events -= (com->iptr - com->ibuf); 1731 com->iptr = com->ibuf; 1732 1733 /* 1734 * There is now room for another low-level buffer full of input, 1735 * so enable RTS if it is now disabled and there is room in the 1736 * high-level buffer. 1737 */ 1738 if ((com->state & CS_RTS_IFLOW) && !(com->mcr_image & MCR_RTS) && 1739 !(tp->t_state & TS_TBLOCK)) 1740 outb(com->modem_ctl_port, com->mcr_image |= MCR_RTS); 1741 } 1742 1743 void 1744 siointr(void *arg) 1745 { 1746 lwkt_gettoken(&tty_token); 1747 #ifndef COM_MULTIPORT 1748 com_lock(); 1749 siointr1((struct com_s *) arg); 1750 com_unlock(); 1751 #else /* COM_MULTIPORT */ 1752 bool_t possibly_more_intrs; 1753 int unit; 1754 struct com_s *com; 1755 1756 /* 1757 * Loop until there is no activity on any port. This is necessary 1758 * to get an interrupt edge more than to avoid another interrupt. 1759 * If the IRQ signal is just an OR of the IRQ signals from several 1760 * devices, then the edge from one may be lost because another is 1761 * on. 1762 */ 1763 com_lock(); 1764 do { 1765 possibly_more_intrs = FALSE; 1766 for (unit = 0; unit < sio_numunits; ++unit) { 1767 com = com_addr(unit); 1768 /* 1769 * XXX com_lock(); 1770 * would it work here, or be counter-productive? 1771 */ 1772 if (com != NULL 1773 && !com->gone 1774 && (inb(com->int_id_port) & IIR_IMASK) 1775 != IIR_NOPEND) { 1776 siointr1(com); 1777 possibly_more_intrs = TRUE; 1778 } 1779 /* XXX com_unlock(); */ 1780 } 1781 } while (possibly_more_intrs); 1782 com_unlock(); 1783 #endif /* COM_MULTIPORT */ 1784 lwkt_reltoken(&tty_token); 1785 } 1786 1787 static void 1788 siointr1(struct com_s *com) 1789 { 1790 u_char line_status; 1791 u_char modem_status; 1792 u_char *ioptr; 1793 u_char recv_data; 1794 u_char int_ctl; 1795 u_char int_ctl_new; 1796 u_int count; 1797 1798 lwkt_gettoken(&tty_token); 1799 int_ctl = inb(com->intr_ctl_port); 1800 int_ctl_new = int_ctl; 1801 1802 while (!com->gone) { 1803 if (com->pps.ppsparam.mode & PPS_CAPTUREBOTH) { 1804 modem_status = inb(com->modem_status_port); 1805 if ((modem_status ^ com->last_modem_status) & MSR_DCD) { 1806 count = sys_cputimer->count(); 1807 pps_event(&com->pps, count, 1808 (modem_status & MSR_DCD) ? 1809 PPS_CAPTUREASSERT : PPS_CAPTURECLEAR); 1810 } 1811 } 1812 line_status = inb(com->line_status_port); 1813 1814 /* input event? (check first to help avoid overruns) */ 1815 while (line_status & LSR_RCV_MASK) { 1816 /* break/unnattached error bits or real input? */ 1817 if (!(line_status & LSR_RXRDY)) 1818 recv_data = 0; 1819 else 1820 recv_data = inb(com->data_port); 1821 #if defined(DDB) && defined(ALT_BREAK_TO_DEBUGGER) 1822 /* 1823 * Solaris implements a new BREAK which is initiated 1824 * by a character sequence CR ~ ^b which is similar 1825 * to a familiar pattern used on Sun servers by the 1826 * Remote Console. 1827 */ 1828 #define KEY_CRTLB 2 /* ^B */ 1829 #define KEY_CR 13 /* CR '\r' */ 1830 #define KEY_TILDE 126 /* ~ */ 1831 1832 if (com->unit == comconsole) { 1833 static int brk_state1 = 0, brk_state2 = 0; 1834 if (recv_data == KEY_CR) { 1835 brk_state1 = recv_data; 1836 brk_state2 = 0; 1837 } else if (brk_state1 == KEY_CR && (recv_data == KEY_TILDE || recv_data == KEY_CRTLB)) { 1838 if (recv_data == KEY_TILDE) 1839 brk_state2 = recv_data; 1840 else if (brk_state2 == KEY_TILDE && recv_data == KEY_CRTLB) { 1841 breakpoint(); 1842 brk_state1 = brk_state2 = 0; 1843 goto cont; 1844 } else 1845 brk_state2 = 0; 1846 } else 1847 brk_state1 = 0; 1848 } 1849 #endif 1850 if (line_status & (LSR_BI | LSR_FE | LSR_PE)) { 1851 /* 1852 * Don't store BI if IGNBRK or FE/PE if IGNPAR. 1853 * Otherwise, push the work to a higher level 1854 * (to handle PARMRK) if we're bypassing. 1855 * Otherwise, convert BI/FE and PE+INPCK to 0. 1856 * 1857 * This makes bypassing work right in the 1858 * usual "raw" case (IGNBRK set, and IGNPAR 1859 * and INPCK clear). 1860 * 1861 * Note: BI together with FE/PE means just BI. 1862 */ 1863 if (line_status & LSR_BI) { 1864 #if defined(DDB) && defined(BREAK_TO_DEBUGGER) 1865 if (com->unit == comconsole) { 1866 breakpoint(); 1867 goto cont; 1868 } 1869 #endif 1870 if (com->tp == NULL 1871 || com->tp->t_iflag & IGNBRK) 1872 goto cont; 1873 } else { 1874 if (com->tp == NULL 1875 || com->tp->t_iflag & IGNPAR) 1876 goto cont; 1877 } 1878 if (com->tp->t_state & TS_CAN_BYPASS_L_RINT 1879 && (line_status & (LSR_BI | LSR_FE) 1880 || com->tp->t_iflag & INPCK)) 1881 recv_data = 0; 1882 } 1883 ++com->bytes_in; 1884 if (com->hotchar != 0 && recv_data == com->hotchar) 1885 setsofttty(); 1886 ioptr = com->iptr; 1887 if (ioptr >= com->ibufend) 1888 CE_RECORD(com, CE_INTERRUPT_BUF_OVERFLOW); 1889 else { 1890 if (com->do_timestamp) 1891 microtime(&com->timestamp); 1892 ++com_events; 1893 schedsofttty(); 1894 #if 0 /* for testing input latency vs efficiency */ 1895 if (com->iptr - com->ibuf == 8) 1896 setsofttty(); 1897 #endif 1898 ioptr[0] = recv_data; 1899 ioptr[com->ierroff] = line_status; 1900 com->iptr = ++ioptr; 1901 if (ioptr == com->ihighwater 1902 && com->state & CS_RTS_IFLOW) 1903 outb(com->modem_ctl_port, 1904 com->mcr_image &= ~MCR_RTS); 1905 if (line_status & LSR_OE) 1906 CE_RECORD(com, CE_OVERRUN); 1907 } 1908 cont: 1909 /* 1910 * "& 0x7F" is to avoid the gcc-1.40 generating a slow 1911 * jump from the top of the loop to here 1912 */ 1913 line_status = inb(com->line_status_port) & 0x7F; 1914 } 1915 1916 /* modem status change? (always check before doing output) */ 1917 modem_status = inb(com->modem_status_port); 1918 if (modem_status != com->last_modem_status) { 1919 if (com->do_dcd_timestamp 1920 && !(com->last_modem_status & MSR_DCD) 1921 && modem_status & MSR_DCD) 1922 microtime(&com->dcd_timestamp); 1923 1924 /* 1925 * Schedule high level to handle DCD changes. Note 1926 * that we don't use the delta bits anywhere. Some 1927 * UARTs mess them up, and it's easy to remember the 1928 * previous bits and calculate the delta. 1929 */ 1930 com->last_modem_status = modem_status; 1931 if (!(com->state & CS_CHECKMSR)) { 1932 com_events += LOTS_OF_EVENTS; 1933 com->state |= CS_CHECKMSR; 1934 setsofttty(); 1935 } 1936 1937 /* handle CTS change immediately for crisp flow ctl */ 1938 if (com->state & CS_CTS_OFLOW) { 1939 if (modem_status & MSR_CTS) 1940 com->state |= CS_ODEVREADY; 1941 else 1942 com->state &= ~CS_ODEVREADY; 1943 } 1944 } 1945 1946 /* output queued and everything ready? */ 1947 if (line_status & LSR_TXRDY 1948 && com->state >= (CS_BUSY | CS_TTGO | CS_ODEVREADY)) { 1949 ioptr = com->obufq.l_head; 1950 if (com->tx_fifo_size > 1) { 1951 u_int ocount; 1952 1953 ocount = com->obufq.l_tail - ioptr; 1954 if (ocount > com->tx_fifo_size) 1955 ocount = com->tx_fifo_size; 1956 com->bytes_out += ocount; 1957 do 1958 outb(com->data_port, *ioptr++); 1959 while (--ocount != 0); 1960 } else { 1961 outb(com->data_port, *ioptr++); 1962 ++com->bytes_out; 1963 } 1964 com->obufq.l_head = ioptr; 1965 if (COM_IIR_TXRDYBUG(com->flags)) { 1966 int_ctl_new = int_ctl | IER_ETXRDY; 1967 } 1968 if (ioptr >= com->obufq.l_tail) { 1969 struct lbq *qp; 1970 1971 qp = com->obufq.l_next; 1972 qp->l_queued = FALSE; 1973 qp = qp->l_next; 1974 if (qp != NULL) { 1975 com->obufq.l_head = qp->l_head; 1976 com->obufq.l_tail = qp->l_tail; 1977 com->obufq.l_next = qp; 1978 } else { 1979 /* output just completed */ 1980 if (COM_IIR_TXRDYBUG(com->flags)) { 1981 int_ctl_new = int_ctl & ~IER_ETXRDY; 1982 } 1983 com->state &= ~CS_BUSY; 1984 } 1985 if (!(com->state & CS_ODONE)) { 1986 com_events += LOTS_OF_EVENTS; 1987 com->state |= CS_ODONE; 1988 setsofttty(); /* handle at high level ASAP */ 1989 } 1990 } 1991 if (COM_IIR_TXRDYBUG(com->flags) && (int_ctl != int_ctl_new)) { 1992 outb(com->intr_ctl_port, int_ctl_new); 1993 } 1994 } 1995 1996 /* finished? */ 1997 #ifndef COM_MULTIPORT 1998 if ((inb(com->int_id_port) & IIR_IMASK) == IIR_NOPEND) 1999 #endif /* COM_MULTIPORT */ 2000 { 2001 lwkt_reltoken(&tty_token); 2002 return; 2003 } 2004 } 2005 lwkt_reltoken(&tty_token); 2006 } 2007 2008 static int 2009 sioioctl(struct dev_ioctl_args *ap) 2010 { 2011 cdev_t dev = ap->a_head.a_dev; 2012 caddr_t data = ap->a_data; 2013 struct com_s *com; 2014 int error; 2015 int mynor; 2016 struct tty *tp; 2017 #if defined(COMPAT_43) || defined(COMPAT_SUNOS) 2018 u_long oldcmd; 2019 struct termios term; 2020 #endif 2021 lwkt_gettoken(&tty_token); 2022 mynor = minor(dev); 2023 2024 com = com_addr(MINOR_TO_UNIT(mynor)); 2025 if (com == NULL || com->gone) { 2026 lwkt_reltoken(&tty_token); 2027 return (ENODEV); 2028 } 2029 if (mynor & CONTROL_MASK) { 2030 struct termios *ct; 2031 2032 switch (mynor & CONTROL_MASK) { 2033 case CONTROL_INIT_STATE: 2034 ct = mynor & CALLOUT_MASK ? &com->it_out : &com->it_in; 2035 break; 2036 case CONTROL_LOCK_STATE: 2037 ct = mynor & CALLOUT_MASK ? &com->lt_out : &com->lt_in; 2038 break; 2039 default: 2040 lwkt_reltoken(&tty_token); 2041 return (ENODEV); /* /dev/nodev */ 2042 } 2043 switch (ap->a_cmd) { 2044 case TIOCSETA: 2045 error = priv_check_cred(ap->a_cred, PRIV_ROOT, 0); 2046 if (error != 0) 2047 return (error); 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 defined(COMPAT_43) || defined(COMPAT_SUNOS) 2070 term = tp->t_termios; 2071 oldcmd = ap->a_cmd; 2072 error = ttsetcompat(tp, &ap->a_cmd, data, &term); 2073 if (error != 0) { 2074 lwkt_reltoken(&tty_token); 2075 return (error); 2076 } 2077 if (ap->a_cmd != oldcmd) 2078 data = (caddr_t)&term; 2079 #endif 2080 if (ap->a_cmd == TIOCSETA || ap->a_cmd == TIOCSETAW || 2081 ap->a_cmd == TIOCSETAF) { 2082 int cc; 2083 struct termios *dt = (struct termios *)data; 2084 struct termios *lt = mynor & CALLOUT_MASK 2085 ? &com->lt_out : &com->lt_in; 2086 2087 dt->c_iflag = (tp->t_iflag & lt->c_iflag) 2088 | (dt->c_iflag & ~lt->c_iflag); 2089 dt->c_oflag = (tp->t_oflag & lt->c_oflag) 2090 | (dt->c_oflag & ~lt->c_oflag); 2091 dt->c_cflag = (tp->t_cflag & lt->c_cflag) 2092 | (dt->c_cflag & ~lt->c_cflag); 2093 dt->c_lflag = (tp->t_lflag & lt->c_lflag) 2094 | (dt->c_lflag & ~lt->c_lflag); 2095 for (cc = 0; cc < NCCS; ++cc) 2096 if (lt->c_cc[cc] != 0) 2097 dt->c_cc[cc] = tp->t_cc[cc]; 2098 if (lt->c_ispeed != 0) 2099 dt->c_ispeed = tp->t_ispeed; 2100 if (lt->c_ospeed != 0) 2101 dt->c_ospeed = tp->t_ospeed; 2102 } 2103 error = (*linesw[tp->t_line].l_ioctl)(tp, ap->a_cmd, data, ap->a_fflag, ap->a_cred); 2104 if (error != ENOIOCTL) { 2105 lwkt_reltoken(&tty_token); 2106 return (error); 2107 } 2108 crit_enter(); 2109 error = ttioctl(tp, ap->a_cmd, data, ap->a_fflag); 2110 disc_optim(tp, &tp->t_termios, com); 2111 if (error != ENOIOCTL) { 2112 crit_exit(); 2113 lwkt_reltoken(&tty_token); 2114 return (error); 2115 } 2116 switch (ap->a_cmd) { 2117 case TIOCSBRK: 2118 sio_setreg(com, com_cfcr, com->cfcr_image |= CFCR_SBREAK); 2119 break; 2120 case TIOCCBRK: 2121 sio_setreg(com, com_cfcr, com->cfcr_image &= ~CFCR_SBREAK); 2122 break; 2123 case TIOCSDTR: 2124 (void)commctl(com, TIOCM_DTR, DMBIS); 2125 break; 2126 case TIOCCDTR: 2127 (void)commctl(com, TIOCM_DTR, DMBIC); 2128 break; 2129 /* 2130 * XXX should disallow changing MCR_RTS if CS_RTS_IFLOW is set. The 2131 * changes get undone on the next call to comparam(). 2132 */ 2133 case TIOCMSET: 2134 (void)commctl(com, *(int *)data, DMSET); 2135 break; 2136 case TIOCMBIS: 2137 (void)commctl(com, *(int *)data, DMBIS); 2138 break; 2139 case TIOCMBIC: 2140 (void)commctl(com, *(int *)data, DMBIC); 2141 break; 2142 case TIOCMGET: 2143 *(int *)data = commctl(com, 0, DMGET); 2144 break; 2145 case TIOCMSDTRWAIT: 2146 /* must be root since the wait applies to following logins */ 2147 error = priv_check_cred(ap->a_cred, PRIV_ROOT, 0); 2148 if (error != 0) { 2149 crit_exit(); 2150 lwkt_reltoken(&tty_token); 2151 return (error); 2152 } 2153 com->dtr_wait = *(int *)data * hz / 100; 2154 break; 2155 case TIOCMGDTRWAIT: 2156 *(int *)data = com->dtr_wait * 100 / hz; 2157 break; 2158 case TIOCTIMESTAMP: 2159 com->do_timestamp = TRUE; 2160 *(struct timeval *)data = com->timestamp; 2161 break; 2162 case TIOCDCDTIMESTAMP: 2163 com->do_dcd_timestamp = TRUE; 2164 *(struct timeval *)data = com->dcd_timestamp; 2165 break; 2166 default: 2167 crit_exit(); 2168 error = pps_ioctl(ap->a_cmd, data, &com->pps); 2169 if (error == ENODEV) 2170 error = ENOTTY; 2171 lwkt_reltoken(&tty_token); 2172 return (error); 2173 } 2174 crit_exit(); 2175 lwkt_reltoken(&tty_token); 2176 return (0); 2177 } 2178 2179 static void 2180 siopoll(void *dummy, void *frame) 2181 { 2182 int unit; 2183 2184 lwkt_gettoken(&tty_token); 2185 if (com_events == 0) { 2186 lwkt_reltoken(&tty_token); 2187 return; 2188 } 2189 2190 repeat: 2191 for (unit = 0; unit < sio_numunits; ++unit) { 2192 struct com_s *com; 2193 int incc; 2194 struct tty *tp; 2195 2196 com = com_addr(unit); 2197 if (com == NULL) 2198 continue; 2199 tp = com->tp; 2200 if (tp == NULL || com->gone) { 2201 /* 2202 * Discard any events related to never-opened or 2203 * going-away devices. 2204 */ 2205 com_lock(); 2206 incc = com->iptr - com->ibuf; 2207 com->iptr = com->ibuf; 2208 if (com->state & CS_CHECKMSR) { 2209 incc += LOTS_OF_EVENTS; 2210 com->state &= ~CS_CHECKMSR; 2211 } 2212 com_events -= incc; 2213 com_unlock(); 2214 continue; 2215 } 2216 if (com->iptr != com->ibuf) { 2217 com_lock(); 2218 sioinput(com); 2219 com_unlock(); 2220 } 2221 if (com->state & CS_CHECKMSR) { 2222 u_char delta_modem_status; 2223 2224 com_lock(); 2225 delta_modem_status = com->last_modem_status 2226 ^ com->prev_modem_status; 2227 com->prev_modem_status = com->last_modem_status; 2228 com_events -= LOTS_OF_EVENTS; 2229 com->state &= ~CS_CHECKMSR; 2230 com_unlock(); 2231 if (delta_modem_status & MSR_DCD) 2232 (*linesw[tp->t_line].l_modem) 2233 (tp, com->prev_modem_status & MSR_DCD); 2234 } 2235 if (com->state & CS_ODONE) { 2236 com_lock(); 2237 com_events -= LOTS_OF_EVENTS; 2238 com->state &= ~CS_ODONE; 2239 com_unlock(); 2240 if (!(com->state & CS_BUSY) 2241 && !(com->extra_state & CSE_BUSYCHECK)) { 2242 callout_reset(&com->busy_ch, hz / 100, 2243 siobusycheck, com); 2244 com->extra_state |= CSE_BUSYCHECK; 2245 } 2246 (*linesw[tp->t_line].l_start)(tp); 2247 } 2248 if (com_events == 0) 2249 break; 2250 } 2251 if (com_events >= LOTS_OF_EVENTS) 2252 goto repeat; 2253 lwkt_reltoken(&tty_token); 2254 } 2255 2256 static int 2257 comparam(struct tty *tp, struct termios *t) 2258 { 2259 u_int cfcr; 2260 int cflag; 2261 struct com_s *com; 2262 u_int divisor; 2263 u_char dlbh; 2264 u_char dlbl; 2265 int unit; 2266 2267 lwkt_gettoken(&tty_token); 2268 unit = DEV_TO_UNIT(tp->t_dev); 2269 com = com_addr(unit); 2270 if (com == NULL) { 2271 lwkt_reltoken(&tty_token); 2272 return (ENODEV); 2273 } 2274 2275 /* do historical conversions */ 2276 if (t->c_ispeed == 0) 2277 t->c_ispeed = t->c_ospeed; 2278 2279 /* check requested parameters */ 2280 if (t->c_ospeed == 0) 2281 divisor = 0; 2282 else { 2283 if (t->c_ispeed != t->c_ospeed) { 2284 lwkt_reltoken(&tty_token); 2285 return (EINVAL); 2286 } 2287 divisor = siodivisor(com->rclk, t->c_ispeed); 2288 if (divisor == 0) { 2289 lwkt_reltoken(&tty_token); 2290 return (EINVAL); 2291 } 2292 } 2293 2294 /* parameters are OK, convert them to the com struct and the device */ 2295 crit_enter(); 2296 if (divisor == 0) 2297 (void)commctl(com, TIOCM_DTR, DMBIC); /* hang up line */ 2298 else 2299 (void)commctl(com, TIOCM_DTR, DMBIS); 2300 cflag = t->c_cflag; 2301 switch (cflag & CSIZE) { 2302 case CS5: 2303 cfcr = CFCR_5BITS; 2304 break; 2305 case CS6: 2306 cfcr = CFCR_6BITS; 2307 break; 2308 case CS7: 2309 cfcr = CFCR_7BITS; 2310 break; 2311 default: 2312 cfcr = CFCR_8BITS; 2313 break; 2314 } 2315 if (cflag & PARENB) { 2316 cfcr |= CFCR_PENAB; 2317 if (!(cflag & PARODD)) 2318 cfcr |= CFCR_PEVEN; 2319 } 2320 if (cflag & CSTOPB) 2321 cfcr |= CFCR_STOPB; 2322 2323 if (com->hasfifo && divisor != 0) { 2324 /* 2325 * Use a fifo trigger level low enough so that the input 2326 * latency from the fifo is less than about 16 msec and 2327 * the total latency is less than about 30 msec. These 2328 * latencies are reasonable for humans. Serial comms 2329 * protocols shouldn't expect anything better since modem 2330 * latencies are larger. 2331 * 2332 * Interrupts can be held up for long periods of time 2333 * due to inefficiencies in other parts of the kernel, 2334 * certain video cards, etc. Setting the FIFO trigger 2335 * point to MEDH instead of HIGH gives us 694uS of slop 2336 * (8 character times) instead of 173uS (2 character times) 2337 * @ 115200 bps. 2338 */ 2339 com->fifo_image = t->c_ospeed <= 4800 2340 ? FIFO_ENABLE : FIFO_ENABLE | FIFO_RX_MEDH; 2341 #ifdef COM_ESP 2342 /* 2343 * The Hayes ESP card needs the fifo DMA mode bit set 2344 * in compatibility mode. If not, it will interrupt 2345 * for each character received. 2346 */ 2347 if (com->esp) 2348 com->fifo_image |= FIFO_DMA_MODE; 2349 #endif 2350 sio_setreg(com, com_fifo, com->fifo_image); 2351 } 2352 2353 /* 2354 * This returns with interrupts disabled so that we can complete 2355 * the speed change atomically. Keeping interrupts disabled is 2356 * especially important while com_data is hidden. 2357 */ 2358 (void) siosetwater(com, t->c_ispeed); 2359 2360 if (divisor != 0) { 2361 sio_setreg(com, com_cfcr, cfcr | CFCR_DLAB); 2362 /* 2363 * Only set the divisor registers if they would change, 2364 * since on some 16550 incompatibles (UMC8669F), setting 2365 * them while input is arriving them loses sync until 2366 * data stops arriving. 2367 */ 2368 dlbl = divisor & 0xFF; 2369 if (sio_getreg(com, com_dlbl) != dlbl) 2370 sio_setreg(com, com_dlbl, dlbl); 2371 dlbh = divisor >> 8; 2372 if (sio_getreg(com, com_dlbh) != dlbh) 2373 sio_setreg(com, com_dlbh, dlbh); 2374 } 2375 2376 sio_setreg(com, com_cfcr, com->cfcr_image = cfcr); 2377 2378 if (!(tp->t_state & TS_TTSTOP)) 2379 com->state |= CS_TTGO; 2380 2381 if (cflag & CRTS_IFLOW) { 2382 if (com->st16650a) { 2383 sio_setreg(com, com_cfcr, 0xbf); 2384 sio_setreg(com, com_fifo, 2385 sio_getreg(com, com_fifo) | 0x40); 2386 } 2387 com->state |= CS_RTS_IFLOW; 2388 /* 2389 * If CS_RTS_IFLOW just changed from off to on, the change 2390 * needs to be propagated to MCR_RTS. This isn't urgent, 2391 * so do it later by calling comstart() instead of repeating 2392 * a lot of code from comstart() here. 2393 */ 2394 } else if (com->state & CS_RTS_IFLOW) { 2395 com->state &= ~CS_RTS_IFLOW; 2396 /* 2397 * CS_RTS_IFLOW just changed from on to off. Force MCR_RTS 2398 * on here, since comstart() won't do it later. 2399 */ 2400 outb(com->modem_ctl_port, com->mcr_image |= MCR_RTS); 2401 if (com->st16650a) { 2402 sio_setreg(com, com_cfcr, 0xbf); 2403 sio_setreg(com, com_fifo, 2404 sio_getreg(com, com_fifo) & ~0x40); 2405 } 2406 } 2407 2408 2409 /* 2410 * Set up state to handle output flow control. 2411 * XXX - worth handling MDMBUF (DCD) flow control at the lowest level? 2412 * Now has 10+ msec latency, while CTS flow has 50- usec latency. 2413 */ 2414 com->state |= CS_ODEVREADY; 2415 com->state &= ~CS_CTS_OFLOW; 2416 if (cflag & CCTS_OFLOW) { 2417 com->state |= CS_CTS_OFLOW; 2418 if (!(com->last_modem_status & MSR_CTS)) 2419 com->state &= ~CS_ODEVREADY; 2420 if (com->st16650a) { 2421 sio_setreg(com, com_cfcr, 0xbf); 2422 sio_setreg(com, com_fifo, 2423 sio_getreg(com, com_fifo) | 0x80); 2424 } 2425 } else { 2426 if (com->st16650a) { 2427 sio_setreg(com, com_cfcr, 0xbf); 2428 sio_setreg(com, com_fifo, 2429 sio_getreg(com, com_fifo) & ~0x80); 2430 } 2431 } 2432 2433 sio_setreg(com, com_cfcr, com->cfcr_image); 2434 2435 /* XXX shouldn't call functions while intrs are disabled. */ 2436 disc_optim(tp, t, com); 2437 /* 2438 * Recover from fiddling with CS_TTGO. We used to call siointr1() 2439 * unconditionally, but that defeated the careful discarding of 2440 * stale input in sioopen(). 2441 */ 2442 if (com->state >= (CS_BUSY | CS_TTGO)) 2443 siointr1(com); 2444 2445 com_unlock(); 2446 crit_exit(); 2447 comstart(tp); 2448 if (com->ibufold != NULL) { 2449 kfree(com->ibufold, M_DEVBUF); 2450 com->ibufold = NULL; 2451 } 2452 lwkt_reltoken(&tty_token); 2453 return (0); 2454 } 2455 2456 static int 2457 siosetwater(struct com_s *com, speed_t speed) 2458 { 2459 int cp4ticks; 2460 u_char *ibuf; 2461 int ibufsize; 2462 struct tty *tp; 2463 2464 lwkt_gettoken(&tty_token); 2465 /* 2466 * Make the buffer size large enough to handle a softtty interrupt 2467 * latency of about 2 ticks without loss of throughput or data 2468 * (about 3 ticks if input flow control is not used or not honoured, 2469 * but a bit less for CS5-CS7 modes). 2470 */ 2471 cp4ticks = speed / 10 / hz * 4; 2472 for (ibufsize = 128; ibufsize < cp4ticks;) 2473 ibufsize <<= 1; 2474 if (ibufsize == com->ibufsize) { 2475 com_lock(); 2476 lwkt_reltoken(&tty_token); 2477 return (0); 2478 } 2479 2480 /* 2481 * Allocate input buffer. The extra factor of 2 in the size is 2482 * to allow for an error byte for each input byte. 2483 */ 2484 ibuf = kmalloc(2 * ibufsize, M_DEVBUF, M_WAITOK | M_ZERO); 2485 2486 /* Initialize non-critical variables. */ 2487 com->ibufold = com->ibuf; 2488 com->ibufsize = ibufsize; 2489 tp = com->tp; 2490 if (tp != NULL) { 2491 tp->t_ififosize = 2 * ibufsize; 2492 tp->t_ispeedwat = (speed_t)-1; 2493 tp->t_ospeedwat = (speed_t)-1; 2494 } 2495 2496 /* 2497 * Read current input buffer, if any. Continue with interrupts 2498 * disabled. 2499 */ 2500 com_lock(); 2501 if (com->iptr != com->ibuf) 2502 sioinput(com); 2503 2504 /*- 2505 * Initialize critical variables, including input buffer watermarks. 2506 * The external device is asked to stop sending when the buffer 2507 * exactly reaches high water, or when the high level requests it. 2508 * The high level is notified immediately (rather than at a later 2509 * clock tick) when this watermark is reached. 2510 * The buffer size is chosen so the watermark should almost never 2511 * be reached. 2512 * The low watermark is invisibly 0 since the buffer is always 2513 * emptied all at once. 2514 */ 2515 com->iptr = com->ibuf = ibuf; 2516 com->ibufend = ibuf + ibufsize; 2517 com->ierroff = ibufsize; 2518 com->ihighwater = ibuf + 3 * ibufsize / 4; 2519 lwkt_reltoken(&tty_token); 2520 return (0); 2521 } 2522 2523 static void 2524 comstart(struct tty *tp) 2525 { 2526 struct com_s *com; 2527 int unit; 2528 2529 lwkt_gettoken(&tty_token); 2530 unit = DEV_TO_UNIT(tp->t_dev); 2531 com = com_addr(unit); 2532 if (com == NULL) { 2533 lwkt_reltoken(&tty_token); 2534 return; 2535 } 2536 crit_enter(); 2537 com_lock(); 2538 if (tp->t_state & TS_TTSTOP) 2539 com->state &= ~CS_TTGO; 2540 else 2541 com->state |= CS_TTGO; 2542 if (tp->t_state & TS_TBLOCK) { 2543 if (com->mcr_image & MCR_RTS && com->state & CS_RTS_IFLOW) 2544 outb(com->modem_ctl_port, com->mcr_image &= ~MCR_RTS); 2545 } else { 2546 if (!(com->mcr_image & MCR_RTS) && com->iptr < com->ihighwater 2547 && com->state & CS_RTS_IFLOW) 2548 outb(com->modem_ctl_port, com->mcr_image |= MCR_RTS); 2549 } 2550 com_unlock(); 2551 if (tp->t_state & (TS_TIMEOUT | TS_TTSTOP)) { 2552 ttwwakeup(tp); 2553 crit_exit(); 2554 lwkt_reltoken(&tty_token); 2555 return; 2556 } 2557 if (tp->t_outq.c_cc != 0) { 2558 struct lbq *qp; 2559 struct lbq *next; 2560 2561 if (!com->obufs[0].l_queued) { 2562 com->obufs[0].l_tail 2563 = com->obuf1 + q_to_b(&tp->t_outq, com->obuf1, 2564 sizeof com->obuf1); 2565 com->obufs[0].l_next = NULL; 2566 com->obufs[0].l_queued = TRUE; 2567 com_lock(); 2568 if (com->state & CS_BUSY) { 2569 qp = com->obufq.l_next; 2570 while ((next = qp->l_next) != NULL) 2571 qp = next; 2572 qp->l_next = &com->obufs[0]; 2573 } else { 2574 com->obufq.l_head = com->obufs[0].l_head; 2575 com->obufq.l_tail = com->obufs[0].l_tail; 2576 com->obufq.l_next = &com->obufs[0]; 2577 com->state |= CS_BUSY; 2578 } 2579 com_unlock(); 2580 } 2581 if (tp->t_outq.c_cc != 0 && !com->obufs[1].l_queued) { 2582 com->obufs[1].l_tail 2583 = com->obuf2 + q_to_b(&tp->t_outq, com->obuf2, 2584 sizeof com->obuf2); 2585 com->obufs[1].l_next = NULL; 2586 com->obufs[1].l_queued = TRUE; 2587 com_lock(); 2588 if (com->state & CS_BUSY) { 2589 qp = com->obufq.l_next; 2590 while ((next = qp->l_next) != NULL) 2591 qp = next; 2592 qp->l_next = &com->obufs[1]; 2593 } else { 2594 com->obufq.l_head = com->obufs[1].l_head; 2595 com->obufq.l_tail = com->obufs[1].l_tail; 2596 com->obufq.l_next = &com->obufs[1]; 2597 com->state |= CS_BUSY; 2598 } 2599 com_unlock(); 2600 } 2601 tp->t_state |= TS_BUSY; 2602 } 2603 com_lock(); 2604 if (com->state >= (CS_BUSY | CS_TTGO)) 2605 siointr1(com); /* fake interrupt to start output */ 2606 com_unlock(); 2607 ttwwakeup(tp); 2608 crit_exit(); 2609 lwkt_reltoken(&tty_token); 2610 } 2611 2612 static void 2613 comstop(struct tty *tp, int rw) 2614 { 2615 struct com_s *com; 2616 2617 lwkt_gettoken(&tty_token); 2618 com = com_addr(DEV_TO_UNIT(tp->t_dev)); 2619 if (com == NULL || com->gone) { 2620 lwkt_reltoken(&tty_token); 2621 return; 2622 } 2623 com_lock(); 2624 if (rw & FWRITE) { 2625 if (com->hasfifo) 2626 #ifdef COM_ESP 2627 /* XXX avoid h/w bug. */ 2628 if (!com->esp) 2629 #endif 2630 sio_setreg(com, com_fifo, 2631 FIFO_XMT_RST | com->fifo_image); 2632 com->obufs[0].l_queued = FALSE; 2633 com->obufs[1].l_queued = FALSE; 2634 if (com->state & CS_ODONE) 2635 com_events -= LOTS_OF_EVENTS; 2636 com->state &= ~(CS_ODONE | CS_BUSY); 2637 com->tp->t_state &= ~TS_BUSY; 2638 } 2639 if (rw & FREAD) { 2640 if (com->hasfifo) 2641 #ifdef COM_ESP 2642 /* XXX avoid h/w bug. */ 2643 if (!com->esp) 2644 #endif 2645 sio_setreg(com, com_fifo, 2646 FIFO_RCV_RST | com->fifo_image); 2647 com_events -= (com->iptr - com->ibuf); 2648 com->iptr = com->ibuf; 2649 } 2650 com_unlock(); 2651 comstart(tp); 2652 lwkt_reltoken(&tty_token); 2653 } 2654 2655 static int 2656 commctl(struct com_s *com, int bits, int how) 2657 { 2658 int mcr; 2659 int msr; 2660 2661 lwkt_gettoken(&tty_token); 2662 if (how == DMGET) { 2663 bits = TIOCM_LE; /* XXX - always enabled while open */ 2664 mcr = com->mcr_image; 2665 if (mcr & MCR_DTR) 2666 bits |= TIOCM_DTR; 2667 if (mcr & MCR_RTS) 2668 bits |= TIOCM_RTS; 2669 msr = com->prev_modem_status; 2670 if (msr & MSR_CTS) 2671 bits |= TIOCM_CTS; 2672 if (msr & MSR_DCD) 2673 bits |= TIOCM_CD; 2674 if (msr & MSR_DSR) 2675 bits |= TIOCM_DSR; 2676 /* 2677 * XXX - MSR_RI is naturally volatile, and we make MSR_TERI 2678 * more volatile by reading the modem status a lot. Perhaps 2679 * we should latch both bits until the status is read here. 2680 */ 2681 if (msr & (MSR_RI | MSR_TERI)) 2682 bits |= TIOCM_RI; 2683 lwkt_reltoken(&tty_token); 2684 return (bits); 2685 } 2686 mcr = 0; 2687 if (bits & TIOCM_DTR) 2688 mcr |= MCR_DTR; 2689 if (bits & TIOCM_RTS) 2690 mcr |= MCR_RTS; 2691 if (com->gone) { 2692 lwkt_reltoken(&tty_token); 2693 return(0); 2694 } 2695 com_lock(); 2696 switch (how) { 2697 case DMSET: 2698 outb(com->modem_ctl_port, 2699 com->mcr_image = mcr | (com->mcr_image & MCR_IENABLE)); 2700 break; 2701 case DMBIS: 2702 outb(com->modem_ctl_port, com->mcr_image |= mcr); 2703 break; 2704 case DMBIC: 2705 outb(com->modem_ctl_port, com->mcr_image &= ~mcr); 2706 break; 2707 } 2708 com_unlock(); 2709 lwkt_reltoken(&tty_token); 2710 return (0); 2711 } 2712 2713 /* 2714 * NOTE: Must be called with tty_token held 2715 */ 2716 static void 2717 siosettimeout(void) 2718 { 2719 struct com_s *com; 2720 bool_t someopen; 2721 int unit; 2722 2723 ASSERT_LWKT_TOKEN_HELD(&tty_token); 2724 /* 2725 * Set our timeout period to 1 second if no polled devices are open. 2726 * Otherwise set it to max(1/200, 1/hz). 2727 * Enable timeouts iff some device is open. 2728 */ 2729 callout_stop(&sio_timeout_handle); 2730 sio_timeout = hz; 2731 someopen = FALSE; 2732 for (unit = 0; unit < sio_numunits; ++unit) { 2733 com = com_addr(unit); 2734 if (com != NULL && com->tp != NULL 2735 && com->tp->t_state & TS_ISOPEN && !com->gone) { 2736 someopen = TRUE; 2737 if (com->poll || com->poll_output) { 2738 sio_timeout = hz > 200 ? hz / 200 : 1; 2739 break; 2740 } 2741 } 2742 } 2743 if (someopen) { 2744 sio_timeouts_until_log = hz / sio_timeout; 2745 callout_reset(&sio_timeout_handle, sio_timeout, 2746 comwakeup, NULL); 2747 } else { 2748 /* Flush error messages, if any. */ 2749 sio_timeouts_until_log = 1; 2750 comwakeup(NULL); 2751 callout_stop(&sio_timeout_handle); 2752 } 2753 } 2754 2755 /* 2756 * NOTE: Must be called with tty_token held 2757 */ 2758 static void 2759 comwakeup(void *chan) 2760 { 2761 struct com_s *com; 2762 int unit; 2763 2764 /* 2765 * Can be called from a callout too so just get the token 2766 */ 2767 lwkt_gettoken(&tty_token); 2768 callout_reset(&sio_timeout_handle, sio_timeout, comwakeup, NULL); 2769 2770 /* 2771 * Recover from lost output interrupts. 2772 * Poll any lines that don't use interrupts. 2773 */ 2774 for (unit = 0; unit < sio_numunits; ++unit) { 2775 com = com_addr(unit); 2776 if (com != NULL && !com->gone 2777 && (com->state >= (CS_BUSY | CS_TTGO) || com->poll)) { 2778 com_lock(); 2779 siointr1(com); 2780 com_unlock(); 2781 } 2782 } 2783 2784 /* 2785 * Check for and log errors, but not too often. 2786 */ 2787 if (--sio_timeouts_until_log > 0) { 2788 lwkt_reltoken(&tty_token); 2789 return; 2790 } 2791 sio_timeouts_until_log = hz / sio_timeout; 2792 for (unit = 0; unit < sio_numunits; ++unit) { 2793 int errnum; 2794 2795 com = com_addr(unit); 2796 if (com == NULL) 2797 continue; 2798 if (com->gone) 2799 continue; 2800 for (errnum = 0; errnum < CE_NTYPES; ++errnum) { 2801 u_int delta; 2802 u_long total; 2803 2804 com_lock(); 2805 delta = com->delta_error_counts[errnum]; 2806 com->delta_error_counts[errnum] = 0; 2807 com_unlock(); 2808 if (delta == 0) 2809 continue; 2810 total = com->error_counts[errnum] += delta; 2811 log(LOG_ERR, "sio%d: %u more %s%s (total %lu)\n", 2812 unit, delta, error_desc[errnum], 2813 delta == 1 ? "" : "s", total); 2814 } 2815 } 2816 lwkt_reltoken(&tty_token); 2817 } 2818 2819 static void 2820 disc_optim(struct tty *tp, struct termios *t, struct com_s *com) 2821 { 2822 lwkt_gettoken(&tty_token); 2823 if (!(t->c_iflag & (ICRNL | IGNCR | IMAXBEL | INLCR | ISTRIP | IXON)) 2824 && (!(t->c_iflag & BRKINT) || (t->c_iflag & IGNBRK)) 2825 && (!(t->c_iflag & PARMRK) 2826 || (t->c_iflag & (IGNPAR | IGNBRK)) == (IGNPAR | IGNBRK)) 2827 && !(t->c_lflag & (ECHO | ICANON | IEXTEN | ISIG | PENDIN)) 2828 && linesw[tp->t_line].l_rint == ttyinput) 2829 tp->t_state |= TS_CAN_BYPASS_L_RINT; 2830 else 2831 tp->t_state &= ~TS_CAN_BYPASS_L_RINT; 2832 com->hotchar = linesw[tp->t_line].l_hotchar; 2833 lwkt_reltoken(&tty_token); 2834 } 2835 2836 /* 2837 * Following are all routines needed for SIO to act as console 2838 */ 2839 #include <sys/cons.h> 2840 2841 struct siocnstate { 2842 u_char dlbl; 2843 u_char dlbh; 2844 u_char ier; 2845 u_char cfcr; 2846 u_char mcr; 2847 }; 2848 2849 static speed_t siocngetspeed (Port_t, u_long rclk); 2850 static void siocnclose (struct siocnstate *sp, Port_t iobase); 2851 static void siocnopen (struct siocnstate *sp, Port_t iobase, int speed); 2852 static void siocntxwait (Port_t iobase); 2853 2854 static cn_probe_t siocnprobe; 2855 static cn_init_t siocninit; 2856 static cn_init_fini_t siocninit_fini; 2857 static cn_checkc_t siocncheckc; 2858 static cn_getc_t siocngetc; 2859 static cn_putc_t siocnputc; 2860 2861 #if defined(__i386__) || defined(__x86_64__) 2862 CONS_DRIVER(sio, siocnprobe, siocninit, siocninit_fini, 2863 NULL, siocngetc, siocncheckc, siocnputc, NULL); 2864 #endif 2865 2866 /* To get the GDB related variables */ 2867 #if DDB > 0 2868 #include <ddb/ddb.h> 2869 #endif 2870 2871 static void 2872 siocntxwait(Port_t iobase) 2873 { 2874 int timo; 2875 2876 /* 2877 * Wait for any pending transmission to finish. Required to avoid 2878 * the UART lockup bug when the speed is changed, and for normal 2879 * transmits. 2880 */ 2881 timo = 100000; 2882 while ((inb(iobase + com_lsr) & (LSR_TSRE | LSR_TXRDY)) 2883 != (LSR_TSRE | LSR_TXRDY) && --timo != 0) 2884 ; 2885 } 2886 2887 /* 2888 * Read the serial port specified and try to figure out what speed 2889 * it's currently running at. We're assuming the serial port has 2890 * been initialized and is basicly idle. This routine is only intended 2891 * to be run at system startup. 2892 * 2893 * If the value read from the serial port doesn't make sense, return 0. 2894 */ 2895 /* 2896 * NOTE: Must be called with tty_token held 2897 */ 2898 static speed_t 2899 siocngetspeed(Port_t iobase, u_long rclk) 2900 { 2901 u_int divisor; 2902 u_char dlbh; 2903 u_char dlbl; 2904 u_char cfcr; 2905 2906 cfcr = inb(iobase + com_cfcr); 2907 outb(iobase + com_cfcr, CFCR_DLAB | cfcr); 2908 2909 dlbl = inb(iobase + com_dlbl); 2910 dlbh = inb(iobase + com_dlbh); 2911 2912 outb(iobase + com_cfcr, cfcr); 2913 2914 divisor = dlbh << 8 | dlbl; 2915 2916 /* XXX there should be more sanity checking. */ 2917 if (divisor == 0) 2918 return (CONSPEED); 2919 return (rclk / (16UL * divisor)); 2920 } 2921 2922 static void 2923 siocnopen(struct siocnstate *sp, Port_t iobase, int speed) 2924 { 2925 u_int divisor; 2926 u_char dlbh; 2927 u_char dlbl; 2928 2929 /* 2930 * Save all the device control registers except the fifo register 2931 * and set our default ones (cs8 -parenb speed=comdefaultrate). 2932 * We can't save the fifo register since it is read-only. 2933 */ 2934 sp->ier = inb(iobase + com_ier); 2935 outb(iobase + com_ier, 0); /* spltty() doesn't stop siointr() */ 2936 siocntxwait(iobase); 2937 sp->cfcr = inb(iobase + com_cfcr); 2938 outb(iobase + com_cfcr, CFCR_DLAB | CFCR_8BITS); 2939 sp->dlbl = inb(iobase + com_dlbl); 2940 sp->dlbh = inb(iobase + com_dlbh); 2941 /* 2942 * Only set the divisor registers if they would change, since on 2943 * some 16550 incompatibles (Startech), setting them clears the 2944 * data input register. This also reduces the effects of the 2945 * UMC8669F bug. 2946 */ 2947 divisor = siodivisor(comdefaultrclk, speed); 2948 dlbl = divisor & 0xFF; 2949 if (sp->dlbl != dlbl) 2950 outb(iobase + com_dlbl, dlbl); 2951 dlbh = divisor >> 8; 2952 if (sp->dlbh != dlbh) 2953 outb(iobase + com_dlbh, dlbh); 2954 outb(iobase + com_cfcr, CFCR_8BITS); 2955 sp->mcr = inb(iobase + com_mcr); 2956 /* 2957 * We don't want interrupts, but must be careful not to "disable" 2958 * them by clearing the MCR_IENABLE bit, since that might cause 2959 * an interrupt by floating the IRQ line. 2960 */ 2961 outb(iobase + com_mcr, (sp->mcr & MCR_IENABLE) | MCR_DTR | MCR_RTS); 2962 } 2963 2964 static void 2965 siocnclose(struct siocnstate *sp, Port_t iobase) 2966 { 2967 /* 2968 * Restore the device control registers. 2969 */ 2970 siocntxwait(iobase); 2971 outb(iobase + com_cfcr, CFCR_DLAB | CFCR_8BITS); 2972 if (sp->dlbl != inb(iobase + com_dlbl)) 2973 outb(iobase + com_dlbl, sp->dlbl); 2974 if (sp->dlbh != inb(iobase + com_dlbh)) 2975 outb(iobase + com_dlbh, sp->dlbh); 2976 outb(iobase + com_cfcr, sp->cfcr); 2977 /* 2978 * XXX damp oscillations of MCR_DTR and MCR_RTS by not restoring them. 2979 */ 2980 outb(iobase + com_mcr, sp->mcr | MCR_DTR | MCR_RTS); 2981 outb(iobase + com_ier, sp->ier); 2982 } 2983 2984 static void 2985 siocnprobe(struct consdev *cp) 2986 { 2987 speed_t boot_speed; 2988 u_char cfcr; 2989 u_int divisor; 2990 int unit; 2991 struct siocnstate sp; 2992 2993 /* 2994 * Find our first enabled console, if any. If it is a high-level 2995 * console device, then initialize it and return successfully. 2996 * If it is a low-level console device, then initialize it and 2997 * return unsuccessfully. It must be initialized in both cases 2998 * for early use by console drivers and debuggers. Initializing 2999 * the hardware is not necessary in all cases, since the i/o 3000 * routines initialize it on the fly, but it is necessary if 3001 * input might arrive while the hardware is switched back to an 3002 * uninitialized state. We can't handle multiple console devices 3003 * yet because our low-level routines don't take a device arg. 3004 * We trust the user to set the console flags properly so that we 3005 * don't need to probe. 3006 */ 3007 cp->cn_pri = CN_DEAD; 3008 3009 for (unit = 0; unit < 16; unit++) { /* XXX need to know how many */ 3010 int flags; 3011 int disabled; 3012 if (resource_int_value("sio", unit, "disabled", &disabled) == 0) { 3013 if (disabled) 3014 continue; 3015 } 3016 if (resource_int_value("sio", unit, "flags", &flags)) 3017 continue; 3018 if (COM_CONSOLE(flags) || COM_DEBUGGER(flags)) { 3019 int port; 3020 Port_t iobase; 3021 3022 if (resource_int_value("sio", unit, "port", &port)) 3023 continue; 3024 iobase = port; 3025 crit_enter(); 3026 if (boothowto & RB_SERIAL) { 3027 boot_speed = 3028 siocngetspeed(iobase, comdefaultrclk); 3029 if (boot_speed) 3030 comdefaultrate = boot_speed; 3031 } 3032 3033 /* 3034 * Initialize the divisor latch. We can't rely on 3035 * siocnopen() to do this the first time, since it 3036 * avoids writing to the latch if the latch appears 3037 * to have the correct value. Also, if we didn't 3038 * just read the speed from the hardware, then we 3039 * need to set the speed in hardware so that 3040 * switching it later is null. 3041 */ 3042 com_lock(); 3043 cfcr = inb(iobase + com_cfcr); 3044 outb(iobase + com_cfcr, CFCR_DLAB | cfcr); 3045 divisor = siodivisor(comdefaultrclk, comdefaultrate); 3046 outb(iobase + com_dlbl, divisor & 0xff); 3047 outb(iobase + com_dlbh, divisor >> 8); 3048 outb(iobase + com_cfcr, cfcr); 3049 3050 siocnopen(&sp, iobase, comdefaultrate); 3051 com_unlock(); 3052 3053 crit_exit(); 3054 if (COM_CONSOLE(flags) && !COM_LLCONSOLE(flags)) { 3055 cp->cn_probegood = 1; 3056 cp->cn_private = (void *)(intptr_t)unit; 3057 cp->cn_pri = COM_FORCECONSOLE(flags) 3058 || boothowto & RB_SERIAL 3059 ? CN_REMOTE : CN_NORMAL; 3060 siocniobase = iobase; 3061 siocnunit = unit; 3062 } 3063 if (COM_DEBUGGER(flags) && gdb_tab == NULL) { 3064 kprintf("sio%d: gdb debugging port\n", unit); 3065 siogdbiobase = iobase; 3066 siogdbunit = unit; 3067 #if DDB > 0 3068 cp->cn_gdbprivate = (void *)(intptr_t)unit; 3069 gdb_tab = cp; 3070 #endif 3071 } 3072 } 3073 } 3074 #if defined(__i386__) || defined(__x86_64__) 3075 #if DDB > 0 3076 /* 3077 * XXX Ugly Compatability. 3078 * If no gdb port has been specified, set it to be the console 3079 * as some configuration files don't specify the gdb port. 3080 */ 3081 if (gdb_tab == NULL && (boothowto & RB_GDB)) { 3082 kprintf("Warning: no GDB port specified. Defaulting to sio%d.\n", 3083 siocnunit); 3084 kprintf("Set flag 0x80 on desired GDB port in your\n"); 3085 kprintf("configuration file (currently sio only).\n"); 3086 siogdbiobase = siocniobase; 3087 siogdbunit = siocnunit; 3088 cp->cn_gdbprivate = (void *)(intptr_t)siocnunit; 3089 gdb_tab = cp; 3090 } 3091 #endif 3092 #endif 3093 } 3094 3095 static void 3096 siocninit(struct consdev *cp) 3097 { 3098 comconsole = (int)(intptr_t)cp->cn_private; 3099 } 3100 3101 static void 3102 siocninit_fini(struct consdev *cp) 3103 { 3104 cdev_t dev; 3105 int unit; 3106 3107 if (cp->cn_probegood) { 3108 unit = (int)(intptr_t)cp->cn_private; 3109 /* 3110 * Call devfs_find_device_by_name on ttydX to find the correct device, 3111 * as it should have been created already at this point by the 3112 * attach routine. 3113 * If it isn't found, the serial port was not attached at all and we 3114 * shouldn't be here, so assert this case. 3115 */ 3116 dev = devfs_find_device_by_name("ttyd%r", unit); 3117 3118 KKASSERT(dev != NULL); 3119 cp->cn_dev = dev; 3120 } 3121 } 3122 3123 static int 3124 siocncheckc(void *private) 3125 { 3126 int c; 3127 int unit = (int)(intptr_t)private; 3128 Port_t iobase; 3129 struct siocnstate sp; 3130 3131 if (unit == siogdbunit) 3132 iobase = siogdbiobase; 3133 else 3134 iobase = siocniobase; 3135 com_lock(); 3136 crit_enter(); 3137 siocnopen(&sp, iobase, comdefaultrate); 3138 if (inb(iobase + com_lsr) & LSR_RXRDY) 3139 c = inb(iobase + com_data); 3140 else 3141 c = -1; 3142 siocnclose(&sp, iobase); 3143 crit_exit(); 3144 com_unlock(); 3145 return (c); 3146 } 3147 3148 3149 int 3150 siocngetc(void *private) 3151 { 3152 int c; 3153 int unit = (int)(intptr_t)private; 3154 Port_t iobase; 3155 struct siocnstate sp; 3156 3157 if (unit == siogdbunit) 3158 iobase = siogdbiobase; 3159 else 3160 iobase = siocniobase; 3161 com_lock(); 3162 crit_enter(); 3163 siocnopen(&sp, iobase, comdefaultrate); 3164 while (!(inb(iobase + com_lsr) & LSR_RXRDY)) 3165 ; 3166 c = inb(iobase + com_data); 3167 siocnclose(&sp, iobase); 3168 crit_exit(); 3169 com_unlock(); 3170 return (c); 3171 } 3172 3173 void 3174 siocnputc(void *private, int c) 3175 { 3176 int unit = (int)(intptr_t)private; 3177 struct siocnstate sp; 3178 Port_t iobase; 3179 3180 if (unit == siogdbunit) 3181 iobase = siogdbiobase; 3182 else 3183 iobase = siocniobase; 3184 com_lock(); 3185 crit_enter(); 3186 siocnopen(&sp, iobase, comdefaultrate); 3187 siocntxwait(iobase); 3188 outb(iobase + com_data, c); 3189 siocnclose(&sp, iobase); 3190 crit_exit(); 3191 com_unlock(); 3192 } 3193 3194 DRIVER_MODULE(sio, isa, sio_isa_driver, sio_devclass, 0, 0); 3195 DRIVER_MODULE(sio, acpi, sio_isa_driver, sio_devclass, 0, 0); 3196 #if NPCI > 0 3197 DRIVER_MODULE(sio, pci, sio_pci_driver, sio_devclass, 0, 0); 3198 #endif 3199 #if NPUC > 0 3200 DRIVER_MODULE(sio, puc, sio_puc_driver, sio_devclass, 0, 0); 3201 #endif 3202