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 * from: @(#)com.c 7.5 (Berkeley) 5/16/91 37 * from: i386/isa sio.c,v 1.234 38 */ 39 40 #include "opt_comconsole.h" 41 #include "opt_compat.h" 42 #include "opt_ddb.h" 43 #include "opt_sio.h" 44 #include "use_pci.h" 45 #ifdef __i386__ 46 #include "use_puc.h" 47 #endif 48 #include "use_sio.h" 49 50 /* 51 * Serial driver, based on 386BSD-0.1 com driver. 52 * Mostly rewritten to use pseudo-DMA. 53 * Works for National Semiconductor NS8250-NS16550AF UARTs. 54 * COM driver, based on HP dca driver. 55 * 56 * Changes for PC-Card integration: 57 * - Added PC-Card driver table and handlers 58 */ 59 #include <sys/param.h> 60 #include <sys/systm.h> 61 #include <sys/reboot.h> 62 #include <sys/malloc.h> 63 #include <sys/tty.h> 64 #include <sys/proc.h> 65 #include <sys/priv.h> 66 #include <sys/module.h> 67 #include <sys/conf.h> 68 #include <sys/dkstat.h> 69 #include <sys/fcntl.h> 70 #include <sys/interrupt.h> 71 #include <sys/kernel.h> 72 #include <sys/syslog.h> 73 #include <sys/sysctl.h> 74 #include <sys/bus.h> 75 #include <sys/rman.h> 76 #include <sys/timepps.h> 77 #include <sys/thread2.h> 78 #include <sys/devfs.h> 79 80 #include <machine/limits.h> 81 82 #include <bus/isa/isareg.h> 83 #include <bus/isa/isavar.h> 84 #if NPCI > 0 85 #include <bus/pci/pcireg.h> 86 #include <bus/pci/pcivar.h> 87 #endif 88 #if NPUC > 0 89 #include <dev/misc/puc/pucvar.h> 90 #endif 91 #include <machine/lock.h> 92 93 #include <machine/clock.h> 94 #ifndef SMP 95 #include <machine/lock.h> 96 #endif 97 98 #include "sioreg.h" 99 #include "sio_private.h" 100 101 #ifdef COM_ESP 102 #include "../ic_layer/esp.h" 103 #endif 104 105 #define LOTS_OF_EVENTS 64 /* helps separate urgent events from input */ 106 107 #define CALLOUT_MASK 0x80 108 #define CONTROL_MASK 0x60 109 #define CONTROL_INIT_STATE 0x20 110 #define CONTROL_LOCK_STATE 0x40 111 #define DEV_TO_UNIT(dev) (MINOR_TO_UNIT(minor(dev))) 112 #define MINOR_TO_UNIT(mynor) ((((mynor) & ~0xffffU) >> (8 + 3)) \ 113 | ((mynor) & 0x1f)) 114 #define UNIT_TO_MINOR(unit) ((((unit) & ~0x1fU) << (8 + 3)) \ 115 | ((unit) & 0x1f)) 116 117 #define com_scr 7 /* scratch register for 16450-16550 (R/W) */ 118 119 #define sio_getreg(com, off) \ 120 (bus_space_read_1((com)->bst, (com)->bsh, (off))) 121 #define sio_setreg(com, off, value) \ 122 (bus_space_write_1((com)->bst, (com)->bsh, (off), (value))) 123 124 /* 125 * com state bits. 126 * (CS_BUSY | CS_TTGO) and (CS_BUSY | CS_TTGO | CS_ODEVREADY) must be higher 127 * than the other bits so that they can be tested as a group without masking 128 * off the low bits. 129 * 130 * The following com and tty flags correspond closely: 131 * CS_BUSY = TS_BUSY (maintained by comstart(), siopoll() and 132 * comstop()) 133 * CS_TTGO = ~TS_TTSTOP (maintained by comparam() and comstart()) 134 * CS_CTS_OFLOW = CCTS_OFLOW (maintained by comparam()) 135 * CS_RTS_IFLOW = CRTS_IFLOW (maintained by comparam()) 136 * TS_FLUSH is not used. 137 * XXX I think TIOCSETA doesn't clear TS_TTSTOP when it clears IXON. 138 * XXX CS_*FLOW should be CF_*FLOW in com->flags (control flags not state). 139 */ 140 #define CS_BUSY 0x80 /* output in progress */ 141 #define CS_TTGO 0x40 /* output not stopped by XOFF */ 142 #define CS_ODEVREADY 0x20 /* external device h/w ready (CTS) */ 143 #define CS_CHECKMSR 1 /* check of MSR scheduled */ 144 #define CS_CTS_OFLOW 2 /* use CTS output flow control */ 145 #define CS_DTR_OFF 0x10 /* DTR held off */ 146 #define CS_ODONE 4 /* output completed */ 147 #define CS_RTS_IFLOW 8 /* use RTS input flow control */ 148 #define CSE_BUSYCHECK 1 /* siobusycheck() scheduled */ 149 150 static char const * const error_desc[] = { 151 #define CE_OVERRUN 0 152 "silo overflow", 153 #define CE_INTERRUPT_BUF_OVERFLOW 1 154 "interrupt-level buffer overflow", 155 #define CE_TTY_BUF_OVERFLOW 2 156 "tty-level buffer overflow", 157 }; 158 159 #ifdef COM_ESP 160 static int espattach (struct com_s *com, Port_t esp_port); 161 #endif 162 static int sio_isa_attach (device_t dev); 163 164 static timeout_t siobusycheck; 165 static u_int siodivisor (u_long rclk, speed_t speed); 166 static timeout_t siodtrwakeup; 167 static void comhardclose (struct com_s *com); 168 static void sioinput (struct com_s *com); 169 static void siointr1 (struct com_s *com); 170 static void siointr (void *arg); 171 static int commctl (struct com_s *com, int bits, int how); 172 static int comparam (struct tty *tp, struct termios *t); 173 static inthand2_t siopoll; 174 static int sio_isa_probe (device_t dev); 175 static void siosettimeout (void); 176 static int siosetwater (struct com_s *com, speed_t speed); 177 static void comstart (struct tty *tp); 178 static void comstop (struct tty *tp, int rw); 179 static timeout_t comwakeup; 180 static void disc_optim (struct tty *tp, struct termios *t, 181 struct com_s *com); 182 183 #if NPCI > 0 184 static int sio_pci_attach (device_t dev); 185 static void sio_pci_kludge_unit (device_t dev); 186 static int sio_pci_probe (device_t dev); 187 #endif /* NPCI > 0 */ 188 189 #if NPUC > 0 190 static int sio_puc_attach (device_t dev); 191 static int sio_puc_probe (device_t dev); 192 #endif /* NPUC > 0 */ 193 194 static char driver_name[] = "sio"; 195 196 /* table and macro for fast conversion from a unit number to its com struct */ 197 devclass_t sio_devclass; 198 #define com_addr(unit) ((struct com_s *) \ 199 devclass_get_softc(sio_devclass, unit)) 200 201 static device_method_t sio_isa_methods[] = { 202 /* Device interface */ 203 DEVMETHOD(device_probe, sio_isa_probe), 204 DEVMETHOD(device_attach, sio_isa_attach), 205 206 { 0, 0 } 207 }; 208 209 static driver_t sio_isa_driver = { 210 driver_name, 211 sio_isa_methods, 212 sizeof(struct com_s), 213 }; 214 215 #if NPCI > 0 216 static device_method_t sio_pci_methods[] = { 217 /* Device interface */ 218 DEVMETHOD(device_probe, sio_pci_probe), 219 DEVMETHOD(device_attach, sio_pci_attach), 220 221 { 0, 0 } 222 }; 223 224 static driver_t sio_pci_driver = { 225 driver_name, 226 sio_pci_methods, 227 sizeof(struct com_s), 228 }; 229 #endif /* NPCI > 0 */ 230 231 #if NPUC > 0 232 static device_method_t sio_puc_methods[] = { 233 /* Device interface */ 234 DEVMETHOD(device_probe, sio_puc_probe), 235 DEVMETHOD(device_attach, sio_puc_attach), 236 237 { 0, 0 } 238 }; 239 240 static driver_t sio_puc_driver = { 241 driver_name, 242 sio_puc_methods, 243 sizeof(struct com_s), 244 }; 245 #endif /* NPUC > 0 */ 246 247 static d_open_t sioopen; 248 static d_close_t sioclose; 249 static d_read_t sioread; 250 static d_write_t siowrite; 251 static d_ioctl_t sioioctl; 252 253 static struct dev_ops sio_ops = { 254 { driver_name, 0, D_TTY }, 255 .d_open = sioopen, 256 .d_close = sioclose, 257 .d_read = sioread, 258 .d_write = siowrite, 259 .d_ioctl = sioioctl, 260 .d_kqfilter = ttykqfilter, 261 .d_revoke = ttyrevoke 262 }; 263 264 int comconsole = -1; 265 static volatile speed_t comdefaultrate = CONSPEED; 266 static u_long comdefaultrclk = DEFAULT_RCLK; 267 SYSCTL_ULONG(_machdep, OID_AUTO, conrclk, CTLFLAG_RW, &comdefaultrclk, 0, ""); 268 static u_int com_events; /* input chars + weighted output completions */ 269 static Port_t siocniobase; 270 static int siocnunit; 271 static Port_t siogdbiobase; 272 static int siogdbunit = -1; 273 static bool_t sio_registered; 274 static int sio_timeout; 275 static int sio_timeouts_until_log; 276 static struct callout sio_timeout_handle; 277 static int sio_numunits; 278 279 #ifdef COM_ESP 280 /* XXX configure this properly. */ 281 static Port_t likely_com_ports[] = { 0x3f8, 0x2f8, 0x3e8, 0x2e8, }; 282 static Port_t likely_esp_ports[] = { 0x140, 0x180, 0x280, 0 }; 283 #endif 284 285 /* 286 * handle sysctl read/write requests for console speed 287 * 288 * In addition to setting comdefaultrate for I/O through /dev/console, 289 * also set the initial and lock values for the /dev/ttyXX device 290 * if there is one associated with the console. Finally, if the /dev/tty 291 * device has already been open, change the speed on the open running port 292 * itself. 293 */ 294 295 static int 296 sysctl_machdep_comdefaultrate(SYSCTL_HANDLER_ARGS) 297 { 298 int error; 299 speed_t newspeed; 300 struct com_s *com; 301 struct tty *tp; 302 303 lwkt_gettoken(&tty_token); 304 newspeed = comdefaultrate; 305 306 error = sysctl_handle_opaque(oidp, &newspeed, sizeof newspeed, req); 307 if (error || !req->newptr) { 308 lwkt_reltoken(&tty_token); 309 return (error); 310 } 311 312 comdefaultrate = newspeed; 313 314 if (comconsole < 0) { /* serial console not selected? */ 315 lwkt_reltoken(&tty_token); 316 return (0); 317 } 318 319 com = com_addr(comconsole); 320 if (com == NULL) { 321 lwkt_reltoken(&tty_token); 322 return (ENXIO); 323 } 324 325 /* 326 * set the initial and lock rates for /dev/ttydXX and /dev/cuaXX 327 * (note, the lock rates really are boolean -- if non-zero, disallow 328 * speed changes) 329 */ 330 com->it_in.c_ispeed = com->it_in.c_ospeed = 331 com->lt_in.c_ispeed = com->lt_in.c_ospeed = 332 com->it_out.c_ispeed = com->it_out.c_ospeed = 333 com->lt_out.c_ispeed = com->lt_out.c_ospeed = comdefaultrate; 334 335 /* 336 * if we're open, change the running rate too 337 */ 338 tp = com->tp; 339 if (tp && (tp->t_state & TS_ISOPEN)) { 340 tp->t_termios.c_ispeed = 341 tp->t_termios.c_ospeed = comdefaultrate; 342 crit_enter(); 343 error = comparam(tp, &tp->t_termios); 344 crit_exit(); 345 } 346 lwkt_reltoken(&tty_token); 347 return error; 348 } 349 350 SYSCTL_PROC(_machdep, OID_AUTO, conspeed, CTLTYPE_INT | CTLFLAG_RW, 351 0, 0, sysctl_machdep_comdefaultrate, "I", ""); 352 353 #if NPCI > 0 354 struct pci_ids { 355 u_int32_t type; 356 const char *desc; 357 int rid; 358 }; 359 360 static struct pci_ids pci_ids[] = { 361 { 0x100812b9, "3COM PCI FaxModem", 0x10 }, 362 { 0x2000131f, "CyberSerial (1-port) 16550", 0x10 }, 363 { 0x01101407, "Koutech IOFLEX-2S PCI Dual Port Serial", 0x10 }, 364 { 0x01111407, "Koutech IOFLEX-2S PCI Dual Port Serial", 0x10 }, 365 { 0x048011c1, "Lucent kermit based PCI Modem", 0x14 }, 366 { 0x95211415, "Oxford Semiconductor PCI Dual Port Serial", 0x10 }, 367 { 0x7101135e, "SeaLevel Ultra 530.PCI Single Port Serial", 0x18 }, 368 { 0x0000151f, "SmartLink 5634PCV SurfRider", 0x10 }, 369 { 0x98459710, "Netmos Nm9845 PCI Bridge with Dual UART", 0x10 }, 370 { 0x00000000, NULL, 0 } 371 }; 372 373 static int 374 sio_pci_attach(device_t dev) 375 { 376 u_int32_t type; 377 struct pci_ids *id; 378 379 type = pci_get_devid(dev); 380 id = pci_ids; 381 while (id->type && id->type != type) 382 id++; 383 if (id->desc == NULL) 384 return (ENXIO); 385 sio_pci_kludge_unit(dev); 386 return (sioattach(dev, id->rid, 0UL)); 387 } 388 389 /* 390 * Don't cut and paste this to other drivers. It is a horrible kludge 391 * which will fail to work and also be unnecessary in future versions. 392 */ 393 static void 394 sio_pci_kludge_unit(device_t dev) 395 { 396 devclass_t dc; 397 int err; 398 int start; 399 int unit; 400 401 unit = 0; 402 start = 0; 403 while (resource_int_value("sio", unit, "port", &start) == 0 && 404 start > 0) 405 unit++; 406 if (device_get_unit(dev) < unit) { 407 dc = device_get_devclass(dev); 408 while (devclass_get_device(dc, unit)) 409 unit++; 410 device_printf(dev, "moving to sio%d\n", unit); 411 err = device_set_unit(dev, unit); /* EVIL DO NOT COPY */ 412 if (err) 413 device_printf(dev, "error moving device %d\n", err); 414 } 415 } 416 417 static int 418 sio_pci_probe(device_t dev) 419 { 420 u_int32_t type; 421 struct pci_ids *id; 422 423 type = pci_get_devid(dev); 424 id = pci_ids; 425 while (id->type && id->type != type) 426 id++; 427 if (id->desc == NULL) 428 return (ENXIO); 429 device_set_desc(dev, id->desc); 430 return (sioprobe(dev, id->rid, 0UL)); 431 } 432 #endif /* NPCI > 0 */ 433 434 #if NPUC > 0 435 static int 436 sio_puc_attach(device_t dev) 437 { 438 u_int rclk; 439 440 if (BUS_READ_IVAR(device_get_parent(dev), dev, PUC_IVAR_FREQ, 441 &rclk) != 0) 442 rclk = DEFAULT_RCLK; 443 return (sioattach(dev, 0, rclk)); 444 } 445 446 static int 447 sio_puc_probe(device_t dev) 448 { 449 u_int rclk; 450 451 if (BUS_READ_IVAR(device_get_parent(dev), dev, PUC_IVAR_FREQ, 452 &rclk) != 0) 453 rclk = DEFAULT_RCLK; 454 return (sioprobe(dev, 0, rclk)); 455 } 456 #endif /* NPUC */ 457 458 static struct isa_pnp_id sio_ids[] = { 459 {0x0005d041, "Standard PC COM port"}, /* PNP0500 */ 460 {0x0105d041, "16550A-compatible COM port"}, /* PNP0501 */ 461 {0x0205d041, "Multiport serial device (non-intelligent 16550)"}, /* PNP0502 */ 462 {0x1005d041, "Generic IRDA-compatible device"}, /* PNP0510 */ 463 {0x1105d041, "Generic IRDA-compatible device"}, /* PNP0511 */ 464 /* Devices that do not have a compatid */ 465 {0x12206804, NULL}, /* ACH2012 - 5634BTS 56K Video Ready Modem */ 466 {0x7602a904, NULL}, /* AEI0276 - 56K v.90 Fax Modem (LKT) */ 467 {0x00007905, NULL}, /* AKY0000 - 56K Plug&Play Modem */ 468 {0x21107905, NULL}, /* AKY1021 - 56K Plug&Play Modem */ 469 {0x01405407, NULL}, /* AZT4001 - AZT3000 PnP SOUND DEVICE, MODEM */ 470 {0x56039008, NULL}, /* BDP0356 - Best Data 56x2 */ 471 {0x56159008, NULL}, /* BDP1556 - B.D. Smart One 56SPS,Voice Modem*/ 472 {0x36339008, NULL}, /* BDP3336 - Best Data Prods. 336F */ 473 {0x0014490a, NULL}, /* BRI1400 - Boca 33.6 PnP */ 474 {0x0015490a, NULL}, /* BRI1500 - Internal Fax Data */ 475 {0x0034490a, NULL}, /* BRI3400 - Internal ACF Modem */ 476 {0x0094490a, NULL}, /* BRI9400 - Boca K56Flex PnP */ 477 {0x00b4490a, NULL}, /* BRIB400 - Boca 56k PnP */ 478 {0x0030320d, NULL}, /* CIR3000 - Cirrus Logic V43 */ 479 {0x0100440e, NULL}, /* CRD0001 - Cardinal MVP288IV ? */ 480 {0x01308c0e, NULL}, /* CTL3001 - Creative Labs Phoneblaster */ 481 {0x36033610, NULL}, /* DAV0336 - DAVICOM 336PNP MODEM */ 482 {0x01009416, NULL}, /* ETT0001 - E-Tech Bullet 33k6 PnP */ 483 {0x0000aa1a, NULL}, /* FUJ0000 - FUJITSU Modem 33600 PNP/I2 */ 484 {0x1200c31e, NULL}, /* GVC0012 - VF1128HV-R9 (win modem?) */ 485 {0x0303c31e, NULL}, /* GVC0303 - MaxTech 33.6 PnP D/F/V */ 486 {0x0505c31e, NULL}, /* GVC0505 - GVC 56k Faxmodem */ 487 {0x0116c31e, NULL}, /* GVC1601 - Rockwell V.34 Plug & Play Modem */ 488 {0x0050c31e, NULL}, /* GVC5000 - some GVC modem */ 489 {0x3800f91e, NULL}, /* GWY0038 - Telepath with v.90 */ 490 {0x9062f91e, NULL}, /* GWY6290 - Telepath with x2 Technology */ 491 {0x8100e425, NULL}, /* IOD0081 - I-O DATA DEVICE,INC. IFML-560 */ 492 {0x21002534, NULL}, /* MAE0021 - Jetstream Int V.90 56k Voice Series 2*/ 493 {0x0000f435, NULL}, /* MOT0000 - Motorola ModemSURFR 33.6 Intern */ 494 {0x5015f435, NULL}, /* MOT1550 - Motorola ModemSURFR 56K Modem */ 495 {0xf015f435, NULL}, /* MOT15F0 - Motorola VoiceSURFR 56K Modem */ 496 {0x6045f435, NULL}, /* MOT4560 - Motorola ? */ 497 {0x61e7a338, NULL}, /* NECE761 - 33.6Modem */ 498 {0x08804f3f, NULL}, /* OZO8008 - Zoom (33.6k Modem) */ 499 {0x0f804f3f, NULL}, /* OZO800f - Zoom 2812 (56k Modem) */ 500 {0x39804f3f, NULL}, /* OZO8039 - Zoom 56k flex */ 501 {0x00914f3f, NULL}, /* OZO9100 - Zoom 2919 (K56 Faxmodem) */ 502 {0x3024a341, NULL}, /* PMC2430 - Pace 56 Voice Internal Modem */ 503 {0x1000eb49, NULL}, /* ROK0010 - Rockwell ? */ 504 {0x1200b23d, NULL}, /* RSS0012 - OMRON ME5614ISA */ 505 {0x5002734a, NULL}, /* RSS0250 - 5614Jx3(G) Internal Modem */ 506 {0x6202734a, NULL}, /* RSS0262 - 5614Jx3[G] V90+K56Flex Modem */ 507 {0x1010104d, NULL}, /* SHP1010 - Rockwell 33600bps Modem */ 508 {0xc100ad4d, NULL}, /* SMM00C1 - Leopard 56k PnP */ 509 {0x9012b04e, NULL}, /* SUP1290 - Supra ? */ 510 {0x1013b04e, NULL}, /* SUP1310 - SupraExpress 336i PnP */ 511 {0x8013b04e, NULL}, /* SUP1380 - SupraExpress 288i PnP Voice */ 512 {0x8113b04e, NULL}, /* SUP1381 - SupraExpress 336i PnP Voice */ 513 {0x5016b04e, NULL}, /* SUP1650 - Supra 336i Sp Intl */ 514 {0x7016b04e, NULL}, /* SUP1670 - Supra 336i V+ Intl */ 515 {0x7420b04e, NULL}, /* SUP2070 - Supra ? */ 516 {0x8020b04e, NULL}, /* SUP2080 - Supra ? */ 517 {0x8420b04e, NULL}, /* SUP2084 - SupraExpress 56i PnP */ 518 {0x7121b04e, NULL}, /* SUP2171 - SupraExpress 56i Sp? */ 519 {0x8024b04e, NULL}, /* SUP2480 - Supra ? */ 520 {0x01007256, NULL}, /* USR0001 - U.S. Robotics Inc., Sportster W */ 521 {0x02007256, NULL}, /* USR0002 - U.S. Robotics Inc. Sportster 33. */ 522 {0x04007256, NULL}, /* USR0004 - USR Sportster 14.4k */ 523 {0x06007256, NULL}, /* USR0006 - USR Sportster 33.6k */ 524 {0x11007256, NULL}, /* USR0011 - USR ? */ 525 {0x01017256, NULL}, /* USR0101 - USR ? */ 526 {0x30207256, NULL}, /* USR2030 - U.S.Robotics Inc. Sportster 560 */ 527 {0x50207256, NULL}, /* USR2050 - U.S.Robotics Inc. Sportster 33. */ 528 {0x70207256, NULL}, /* USR2070 - U.S.Robotics Inc. Sportster 560 */ 529 {0x30307256, NULL}, /* USR3030 - U.S. Robotics 56K FAX INT */ 530 {0x31307256, NULL}, /* USR3031 - U.S. Robotics 56K FAX INT */ 531 {0x50307256, NULL}, /* USR3050 - U.S. Robotics 56K FAX INT */ 532 {0x70307256, NULL}, /* USR3070 - U.S. Robotics 56K Voice INT */ 533 {0x90307256, NULL}, /* USR3090 - USR ? */ 534 {0x70917256, NULL}, /* USR9170 - U.S. Robotics 56K FAX INT */ 535 {0x90917256, NULL}, /* USR9190 - USR 56k Voice INT */ 536 {0x0300695c, NULL}, /* WCI0003 - Fax/Voice/Modem/Speakphone/Asvd */ 537 {0x01a0896a, NULL}, /* ZTIA001 - Zoom Internal V90 Faxmodem */ 538 {0x61f7896a, NULL}, /* ZTIF761 - Zoom ComStar 33.6 */ 539 {0} 540 }; 541 542 543 544 static int 545 sio_isa_probe(device_t dev) 546 { 547 /* Check isapnp ids */ 548 if (ISA_PNP_PROBE(device_get_parent(dev), dev, sio_ids) == ENXIO) 549 return (ENXIO); 550 return (sioprobe(dev, 0, 0UL)); 551 } 552 553 int 554 sioprobe(device_t dev, int xrid, u_long rclk) 555 { 556 #if 0 557 static bool_t already_init; 558 device_t xdev; 559 #endif 560 struct com_s *com; 561 u_int divisor; 562 bool_t failures[10]; 563 int fn; 564 device_t idev; 565 Port_t iobase; 566 intrmask_t irqmap[4]; 567 intrmask_t irqs; 568 u_char mcr_image; 569 int result; 570 u_long xirq; 571 u_int flags = device_get_flags(dev); 572 int rid; 573 struct resource *port; 574 575 rid = xrid; 576 port = bus_alloc_resource(dev, SYS_RES_IOPORT, &rid, 577 0, ~0, IO_COMSIZE, RF_ACTIVE); 578 if (!port) 579 return (ENXIO); 580 581 lwkt_gettoken(&tty_token); 582 com = device_get_softc(dev); 583 com->bst = rman_get_bustag(port); 584 com->bsh = rman_get_bushandle(port); 585 if (rclk == 0) 586 rclk = DEFAULT_RCLK; 587 com->rclk = rclk; 588 589 #if 0 590 /* 591 * XXX this is broken - when we are first called, there are no 592 * previously configured IO ports. We could hard code 593 * 0x3f8, 0x2f8, 0x3e8, 0x2e8 etc but that's probably worse. 594 * This code has been doing nothing since the conversion since 595 * "count" is zero the first time around. 596 */ 597 if (!already_init) { 598 /* 599 * Turn off MCR_IENABLE for all likely serial ports. An unused 600 * port with its MCR_IENABLE gate open will inhibit interrupts 601 * from any used port that shares the interrupt vector. 602 * XXX the gate enable is elsewhere for some multiports. 603 */ 604 device_t *devs; 605 int count, i, xioport; 606 607 devclass_get_devices(sio_devclass, &devs, &count); 608 for (i = 0; i < count; i++) { 609 xdev = devs[i]; 610 if (device_is_enabled(xdev) && 611 bus_get_resource(xdev, SYS_RES_IOPORT, 0, &xioport, 612 NULL) == 0) 613 outb(xioport + com_mcr, 0); 614 } 615 kfree(devs, M_TEMP); 616 already_init = TRUE; 617 } 618 #endif 619 620 if (COM_LLCONSOLE(flags)) { 621 kprintf("sio%d: reserved for low-level i/o\n", 622 device_get_unit(dev)); 623 bus_release_resource(dev, SYS_RES_IOPORT, rid, port); 624 lwkt_reltoken(&tty_token); 625 return (ENXIO); 626 } 627 628 /* 629 * If the device is on a multiport card and has an AST/4 630 * compatible interrupt control register, initialize this 631 * register and prepare to leave MCR_IENABLE clear in the mcr. 632 * Otherwise, prepare to set MCR_IENABLE in the mcr. 633 * Point idev to the device struct giving the correct id_irq. 634 * This is the struct for the master device if there is one. 635 */ 636 idev = dev; 637 mcr_image = MCR_IENABLE; 638 #ifdef COM_MULTIPORT 639 if (COM_ISMULTIPORT(flags)) { 640 Port_t xiobase; 641 u_long io; 642 643 idev = devclass_get_device(sio_devclass, COM_MPMASTER(flags)); 644 if (idev == NULL) { 645 kprintf("sio%d: master device %d not configured\n", 646 device_get_unit(dev), COM_MPMASTER(flags)); 647 idev = dev; 648 } 649 if (!COM_NOTAST4(flags)) { 650 if (bus_get_resource(idev, SYS_RES_IOPORT, 0, &io, 651 NULL) == 0) { 652 xiobase = io; 653 if (bus_get_resource(idev, SYS_RES_IRQ, 0, 654 NULL, NULL) == 0) 655 outb(xiobase + com_scr, 0x80); 656 else 657 outb(xiobase + com_scr, 0); 658 } 659 mcr_image = 0; 660 } 661 } 662 #endif /* COM_MULTIPORT */ 663 if (bus_get_resource(idev, SYS_RES_IRQ, 0, NULL, NULL) != 0) 664 mcr_image = 0; 665 666 bzero(failures, sizeof failures); 667 iobase = rman_get_start(port); 668 669 /* 670 * We don't want to get actual interrupts, just masked ones. 671 * Interrupts from this line should already be masked in the ICU, 672 * but mask them in the processor as well in case there are some 673 * (misconfigured) shared interrupts. 674 */ 675 com_lock(); 676 /* EXTRA DELAY? */ 677 678 /* 679 * For the TI16754 chips, set prescaler to 1 (4 is often the 680 * default after-reset value) as otherwise it's impossible to 681 * get highest baudrates. 682 */ 683 if (COM_TI16754(flags)) { 684 u_char cfcr, efr; 685 686 cfcr = sio_getreg(com, com_cfcr); 687 sio_setreg(com, com_cfcr, CFCR_EFR_ENABLE); 688 efr = sio_getreg(com, com_efr); 689 /* Unlock extended features to turn off prescaler. */ 690 sio_setreg(com, com_efr, efr | EFR_EFE); 691 /* Disable EFR. */ 692 sio_setreg(com, com_cfcr, (cfcr != CFCR_EFR_ENABLE) ? cfcr : 0); 693 /* Turn off prescaler. */ 694 sio_setreg(com, com_mcr, 695 sio_getreg(com, com_mcr) & ~MCR_PRESCALE); 696 sio_setreg(com, com_cfcr, CFCR_EFR_ENABLE); 697 sio_setreg(com, com_efr, efr); 698 sio_setreg(com, com_cfcr, cfcr); 699 } 700 701 /* 702 * Initialize the speed and the word size and wait long enough to 703 * drain the maximum of 16 bytes of junk in device output queues. 704 * The speed is undefined after a master reset and must be set 705 * before relying on anything related to output. There may be 706 * junk after a (very fast) soft reboot and (apparently) after 707 * master reset. 708 * XXX what about the UART bug avoided by waiting in comparam()? 709 * We don't want to to wait long enough to drain at 2 bps. 710 */ 711 if (iobase == siocniobase) { 712 DELAY((16 + 1) * 1000000 / (comdefaultrate / 10)); 713 } else { 714 sio_setreg(com, com_cfcr, CFCR_DLAB | CFCR_8BITS); 715 divisor = siodivisor(rclk, SIO_TEST_SPEED); 716 sio_setreg(com, com_dlbl, divisor & 0xff); 717 sio_setreg(com, com_dlbh, divisor >> 8); 718 sio_setreg(com, com_cfcr, CFCR_8BITS); 719 DELAY((16 + 1) * 1000000 / (SIO_TEST_SPEED / 10)); 720 } 721 722 /* 723 * Make sure we can drain the receiver. If we can't, the serial 724 * port may not exist. 725 */ 726 for (fn = 0; fn < 256; ++fn) { 727 if ((sio_getreg(com, com_lsr) & LSR_RXRDY) == 0) 728 break; 729 (void)sio_getreg(com, com_data); 730 } 731 if (fn == 256) { 732 com_unlock(); 733 lwkt_reltoken(&tty_token); 734 kprintf("sio%d: can't drain, serial port might " 735 "not exist, disabling\n", device_get_unit(dev)); 736 return (ENXIO); 737 } 738 739 /* 740 * Enable the interrupt gate and disable device interupts. This 741 * should leave the device driving the interrupt line low and 742 * guarantee an edge trigger if an interrupt can be generated. 743 */ 744 /* EXTRA DELAY? */ 745 sio_setreg(com, com_mcr, mcr_image); 746 sio_setreg(com, com_ier, 0); 747 DELAY(1000); /* XXX */ 748 irqmap[0] = isa_irq_pending(); 749 750 /* 751 * Attempt to set loopback mode so that we can send a null byte 752 * without annoying any external device. 753 */ 754 /* EXTRA DELAY? */ 755 sio_setreg(com, com_mcr, mcr_image | MCR_LOOPBACK); 756 757 /* 758 * Attempt to generate an output interrupt. On 8250's, setting 759 * IER_ETXRDY generates an interrupt independent of the current 760 * setting and independent of whether the THR is empty. On 16450's, 761 * setting IER_ETXRDY generates an interrupt independent of the 762 * current setting. On 16550A's, setting IER_ETXRDY only 763 * generates an interrupt when IER_ETXRDY is not already set. 764 */ 765 sio_setreg(com, com_ier, IER_ETXRDY); 766 767 /* 768 * On some 16x50 incompatibles, setting IER_ETXRDY doesn't generate 769 * an interrupt. They'd better generate one for actually doing 770 * output. Loopback may be broken on the same incompatibles but 771 * it's unlikely to do more than allow the null byte out. 772 */ 773 sio_setreg(com, com_data, 0); 774 DELAY((1 + 2) * 1000000 / (SIO_TEST_SPEED / 10)); 775 776 /* 777 * Turn off loopback mode so that the interrupt gate works again 778 * (MCR_IENABLE was hidden). This should leave the device driving 779 * an interrupt line high. It doesn't matter if the interrupt 780 * line oscillates while we are not looking at it, since interrupts 781 * are disabled. 782 */ 783 /* EXTRA DELAY? */ 784 sio_setreg(com, com_mcr, mcr_image); 785 786 /* 787 * Some pcmcia cards have the "TXRDY bug", so we check everyone 788 * for IIR_TXRDY implementation ( Palido 321s, DC-1S... ) 789 */ 790 if (COM_NOPROBE(flags)) { 791 /* Reading IIR register twice */ 792 for (fn = 0; fn < 2; fn ++) { 793 DELAY(10000); 794 failures[6] = sio_getreg(com, com_iir); 795 } 796 /* Check IIR_TXRDY clear ? */ 797 result = 0; 798 if (failures[6] & IIR_TXRDY) { 799 /* Nop, Double check with clearing IER */ 800 sio_setreg(com, com_ier, 0); 801 if (sio_getreg(com, com_iir) & IIR_NOPEND) { 802 /* Ok. we're familia this gang */ 803 SET_FLAG(dev, COM_C_IIR_TXRDYBUG); 804 } else { 805 /* Unknown, Just omit this chip.. XXX */ 806 result = ENXIO; 807 sio_setreg(com, com_mcr, 0); 808 } 809 } else { 810 /* OK. this is well-known guys */ 811 CLR_FLAG(dev, COM_C_IIR_TXRDYBUG); 812 } 813 sio_setreg(com, com_ier, 0); 814 sio_setreg(com, com_cfcr, CFCR_8BITS); 815 com_unlock(); 816 bus_release_resource(dev, SYS_RES_IOPORT, rid, port); 817 lwkt_reltoken(&tty_token); 818 return (iobase == siocniobase ? 0 : result); 819 } 820 821 /* 822 * Check that 823 * o the CFCR, IER and MCR in UART hold the values written to them 824 * (the values happen to be all distinct - this is good for 825 * avoiding false positive tests from bus echoes). 826 * o an output interrupt is generated and its vector is correct. 827 * o the interrupt goes away when the IIR in the UART is read. 828 */ 829 /* EXTRA DELAY? */ 830 failures[0] = sio_getreg(com, com_cfcr) - CFCR_8BITS; 831 failures[1] = sio_getreg(com, com_ier) - IER_ETXRDY; 832 failures[2] = sio_getreg(com, com_mcr) - mcr_image; 833 DELAY(10000); /* Some internal modems need this time */ 834 irqmap[1] = isa_irq_pending(); 835 failures[4] = (sio_getreg(com, com_iir) & IIR_IMASK) - IIR_TXRDY; 836 DELAY(1000); /* XXX */ 837 irqmap[2] = isa_irq_pending(); 838 failures[6] = (sio_getreg(com, com_iir) & IIR_IMASK) - IIR_NOPEND; 839 840 /* 841 * Turn off all device interrupts and check that they go off properly. 842 * Leave MCR_IENABLE alone. For ports without a master port, it gates 843 * the OUT2 output of the UART to 844 * the ICU input. Closing the gate would give a floating ICU input 845 * (unless there is another device driving it) and spurious interrupts. 846 * (On the system that this was first tested on, the input floats high 847 * and gives a (masked) interrupt as soon as the gate is closed.) 848 */ 849 sio_setreg(com, com_ier, 0); 850 sio_setreg(com, com_cfcr, CFCR_8BITS); /* dummy to avoid bus echo */ 851 failures[7] = sio_getreg(com, com_ier); 852 DELAY(1000); /* XXX */ 853 irqmap[3] = isa_irq_pending(); 854 failures[9] = (sio_getreg(com, com_iir) & IIR_IMASK) - IIR_NOPEND; 855 856 com_unlock(); 857 858 irqs = irqmap[1] & ~irqmap[0]; 859 if (bus_get_resource(idev, SYS_RES_IRQ, 0, &xirq, NULL) == 0 && 860 ((1 << xirq) & irqs) == 0) 861 kprintf( 862 "sio%d: configured irq %ld not in bitmap of probed irqs %#x\n", 863 device_get_unit(dev), xirq, irqs); 864 if (bootverbose) 865 kprintf("sio%d: irq maps: %#x %#x %#x %#x\n", 866 device_get_unit(dev), 867 irqmap[0], irqmap[1], irqmap[2], irqmap[3]); 868 869 result = 0; 870 for (fn = 0; fn < sizeof failures; ++fn) 871 if (failures[fn]) { 872 sio_setreg(com, com_mcr, 0); 873 result = ENXIO; 874 if (bootverbose) { 875 kprintf("sio%d: probe failed test(s):", 876 device_get_unit(dev)); 877 for (fn = 0; fn < sizeof failures; ++fn) 878 if (failures[fn]) 879 kprintf(" %d", fn); 880 kprintf("\n"); 881 } 882 break; 883 } 884 bus_release_resource(dev, SYS_RES_IOPORT, rid, port); 885 lwkt_reltoken(&tty_token); 886 return (iobase == siocniobase ? 0 : result); 887 } 888 889 #ifdef COM_ESP 890 static int 891 espattach(struct com_s *com, Port_t esp_port) 892 { 893 u_char dips; 894 u_char val; 895 896 /* 897 * Check the ESP-specific I/O port to see if we're an ESP 898 * card. If not, return failure immediately. 899 */ 900 if ((inb(esp_port) & 0xf3) == 0) { 901 kprintf(" port 0x%x is not an ESP board?\n", esp_port); 902 return (0); 903 } 904 905 lwkt_gettoken(&tty_token); 906 /* 907 * We've got something that claims to be a Hayes ESP card. 908 * Let's hope so. 909 */ 910 911 /* Get the dip-switch configuration */ 912 outb(esp_port + ESP_CMD1, ESP_GETDIPS); 913 dips = inb(esp_port + ESP_STATUS1); 914 915 /* 916 * Bits 0,1 of dips say which COM port we are. 917 */ 918 if (rman_get_start(com->ioportres) == likely_com_ports[dips & 0x03]) 919 kprintf(" : ESP"); 920 else { 921 kprintf(" esp_port has com %d\n", dips & 0x03); 922 lwkt_reltoken(&tty_token); 923 return (0); 924 } 925 926 /* 927 * Check for ESP version 2.0 or later: bits 4,5,6 = 010. 928 */ 929 outb(esp_port + ESP_CMD1, ESP_GETTEST); 930 val = inb(esp_port + ESP_STATUS1); /* clear reg 1 */ 931 val = inb(esp_port + ESP_STATUS2); 932 if ((val & 0x70) < 0x20) { 933 kprintf("-old (%o)", val & 0x70); 934 lwkt_reltoken(&tty_token); 935 return (0); 936 } 937 938 /* 939 * Check for ability to emulate 16550: bit 7 == 1 940 */ 941 if ((dips & 0x80) == 0) { 942 kprintf(" slave"); 943 lwkt_reltoken(&tty_token); 944 return (0); 945 } 946 947 /* 948 * Okay, we seem to be a Hayes ESP card. Whee. 949 */ 950 com->esp = TRUE; 951 com->esp_port = esp_port; 952 lwkt_reltoken(&tty_token); 953 return (1); 954 } 955 #endif /* COM_ESP */ 956 957 static int 958 sio_isa_attach(device_t dev) 959 { 960 return (sioattach(dev, 0, 0UL)); 961 } 962 963 int 964 sioattach(device_t dev, int xrid, u_long rclk) 965 { 966 struct com_s *com; 967 #ifdef COM_ESP 968 Port_t *espp; 969 #endif 970 Port_t iobase; 971 int minorbase; 972 int unit; 973 u_int flags; 974 int rid; 975 struct resource *port; 976 int ret; 977 static int did_init; 978 979 lwkt_gettoken(&tty_token); 980 if (did_init == 0) { 981 did_init = 1; 982 callout_init_mp(&sio_timeout_handle); 983 } 984 985 rid = xrid; 986 port = bus_alloc_resource(dev, SYS_RES_IOPORT, &rid, 987 0, ~0, IO_COMSIZE, RF_ACTIVE); 988 if (!port) { 989 lwkt_reltoken(&tty_token); 990 return (ENXIO); 991 } 992 993 iobase = rman_get_start(port); 994 unit = device_get_unit(dev); 995 com = device_get_softc(dev); 996 flags = device_get_flags(dev); 997 998 if (unit >= sio_numunits) 999 sio_numunits = unit + 1; 1000 /* 1001 * sioprobe() has initialized the device registers as follows: 1002 * o cfcr = CFCR_8BITS. 1003 * It is most important that CFCR_DLAB is off, so that the 1004 * data port is not hidden when we enable interrupts. 1005 * o ier = 0. 1006 * Interrupts are only enabled when the line is open. 1007 * o mcr = MCR_IENABLE, or 0 if the port has AST/4 compatible 1008 * interrupt control register or the config specifies no irq. 1009 * Keeping MCR_DTR and MCR_RTS off might stop the external 1010 * device from sending before we are ready. 1011 */ 1012 bzero(com, sizeof *com); 1013 com->unit = unit; 1014 com->ioportres = port; 1015 com->bst = rman_get_bustag(port); 1016 com->bsh = rman_get_bushandle(port); 1017 com->cfcr_image = CFCR_8BITS; 1018 com->dtr_wait = 3 * hz; 1019 callout_init_mp(&com->dtr_ch); 1020 callout_init_mp(&com->busy_ch); 1021 com->loses_outints = COM_LOSESOUTINTS(flags) != 0; 1022 com->no_irq = bus_get_resource(dev, SYS_RES_IRQ, 0, NULL, NULL) != 0; 1023 com->tx_fifo_size = 1; 1024 com->obufs[0].l_head = com->obuf1; 1025 com->obufs[1].l_head = com->obuf2; 1026 1027 com->data_port = iobase + com_data; 1028 com->int_id_port = iobase + com_iir; 1029 com->modem_ctl_port = iobase + com_mcr; 1030 com->mcr_image = inb(com->modem_ctl_port); 1031 com->line_status_port = iobase + com_lsr; 1032 com->modem_status_port = iobase + com_msr; 1033 com->intr_ctl_port = iobase + com_ier; 1034 1035 if (rclk == 0) 1036 rclk = DEFAULT_RCLK; 1037 com->rclk = rclk; 1038 1039 /* 1040 * We don't use all the flags from <sys/ttydefaults.h> since they 1041 * are only relevant for logins. It's important to have echo off 1042 * initially so that the line doesn't start blathering before the 1043 * echo flag can be turned off. 1044 */ 1045 com->it_in.c_iflag = 0; 1046 com->it_in.c_oflag = 0; 1047 com->it_in.c_cflag = TTYDEF_CFLAG; 1048 com->it_in.c_lflag = 0; 1049 if (unit == comconsole) { 1050 com->it_in.c_iflag = TTYDEF_IFLAG; 1051 com->it_in.c_oflag = TTYDEF_OFLAG; 1052 com->it_in.c_cflag = TTYDEF_CFLAG | CLOCAL; 1053 com->it_in.c_lflag = TTYDEF_LFLAG; 1054 com->lt_out.c_cflag = com->lt_in.c_cflag = CLOCAL; 1055 com->lt_out.c_ispeed = com->lt_out.c_ospeed = 1056 com->lt_in.c_ispeed = com->lt_in.c_ospeed = 1057 com->it_in.c_ispeed = com->it_in.c_ospeed = comdefaultrate; 1058 } else 1059 com->it_in.c_ispeed = com->it_in.c_ospeed = TTYDEF_SPEED; 1060 if (siosetwater(com, com->it_in.c_ispeed) != 0) { 1061 /* 1062 * Leave i/o resources allocated if this is a `cn'-level 1063 * console, so that other devices can't snarf them. 1064 */ 1065 if (iobase != siocniobase) 1066 bus_release_resource(dev, SYS_RES_IOPORT, rid, port); 1067 lwkt_reltoken(&tty_token); 1068 return (ENOMEM); 1069 } 1070 termioschars(&com->it_in); 1071 com->it_out = com->it_in; 1072 1073 /* attempt to determine UART type */ 1074 kprintf("sio%d: type", unit); 1075 1076 1077 #ifdef COM_MULTIPORT 1078 if (!COM_ISMULTIPORT(flags) && !COM_IIR_TXRDYBUG(flags)) 1079 #else 1080 if (!COM_IIR_TXRDYBUG(flags)) 1081 #endif 1082 { 1083 u_char scr; 1084 u_char scr1; 1085 u_char scr2; 1086 1087 scr = sio_getreg(com, com_scr); 1088 sio_setreg(com, com_scr, 0xa5); 1089 scr1 = sio_getreg(com, com_scr); 1090 sio_setreg(com, com_scr, 0x5a); 1091 scr2 = sio_getreg(com, com_scr); 1092 sio_setreg(com, com_scr, scr); 1093 if (scr1 != 0xa5 || scr2 != 0x5a) { 1094 kprintf(" 8250"); 1095 goto determined_type; 1096 } 1097 } 1098 sio_setreg(com, com_fifo, FIFO_ENABLE | FIFO_RX_HIGH); 1099 DELAY(100); 1100 com->st16650a = 0; 1101 switch (inb(com->int_id_port) & IIR_FIFO_MASK) { 1102 case FIFO_RX_LOW: 1103 kprintf(" 16450"); 1104 break; 1105 case FIFO_RX_MEDL: 1106 kprintf(" 16450?"); 1107 break; 1108 case FIFO_RX_MEDH: 1109 kprintf(" 16550?"); 1110 break; 1111 case FIFO_RX_HIGH: 1112 if (COM_NOFIFO(flags)) { 1113 kprintf(" 16550A fifo disabled"); 1114 } else { 1115 com->hasfifo = TRUE; 1116 if (COM_ST16650A(flags)) { 1117 com->st16650a = 1; 1118 com->tx_fifo_size = 32; 1119 kprintf(" ST16650A"); 1120 } else if (COM_TI16754(flags)) { 1121 com->tx_fifo_size = 64; 1122 kprintf(" TI16754"); 1123 } else { 1124 com->tx_fifo_size = COM_FIFOSIZE(flags); 1125 kprintf(" 16550A"); 1126 } 1127 } 1128 #ifdef COM_ESP 1129 for (espp = likely_esp_ports; *espp != 0; espp++) 1130 if (espattach(com, *espp)) { 1131 com->tx_fifo_size = 1024; 1132 break; 1133 } 1134 #endif 1135 if (!com->st16650a && !COM_TI16754(flags)) { 1136 if (!com->tx_fifo_size) 1137 com->tx_fifo_size = 16; 1138 else 1139 kprintf(" lookalike with %d bytes FIFO", 1140 com->tx_fifo_size); 1141 } 1142 1143 break; 1144 } 1145 1146 #ifdef COM_ESP 1147 if (com->esp) { 1148 /* 1149 * Set 16550 compatibility mode. 1150 * We don't use the ESP_MODE_SCALE bit to increase the 1151 * fifo trigger levels because we can't handle large 1152 * bursts of input. 1153 * XXX flow control should be set in comparam(), not here. 1154 */ 1155 outb(com->esp_port + ESP_CMD1, ESP_SETMODE); 1156 outb(com->esp_port + ESP_CMD2, ESP_MODE_RTS | ESP_MODE_FIFO); 1157 1158 /* Set RTS/CTS flow control. */ 1159 outb(com->esp_port + ESP_CMD1, ESP_SETFLOWTYPE); 1160 outb(com->esp_port + ESP_CMD2, ESP_FLOW_RTS); 1161 outb(com->esp_port + ESP_CMD2, ESP_FLOW_CTS); 1162 1163 /* Set flow-control levels. */ 1164 outb(com->esp_port + ESP_CMD1, ESP_SETRXFLOW); 1165 outb(com->esp_port + ESP_CMD2, HIBYTE(768)); 1166 outb(com->esp_port + ESP_CMD2, LOBYTE(768)); 1167 outb(com->esp_port + ESP_CMD2, HIBYTE(512)); 1168 outb(com->esp_port + ESP_CMD2, LOBYTE(512)); 1169 } 1170 #endif /* COM_ESP */ 1171 sio_setreg(com, com_fifo, 0); 1172 determined_type: ; 1173 1174 #ifdef COM_MULTIPORT 1175 if (COM_ISMULTIPORT(flags)) { 1176 device_t masterdev; 1177 1178 com->multiport = TRUE; 1179 kprintf(" (multiport"); 1180 if (unit == COM_MPMASTER(flags)) 1181 kprintf(" master"); 1182 kprintf(")"); 1183 masterdev = devclass_get_device(sio_devclass, 1184 COM_MPMASTER(flags)); 1185 com->no_irq = (masterdev == NULL || bus_get_resource(masterdev, 1186 SYS_RES_IRQ, 0, NULL, NULL) != 0); 1187 } 1188 #endif /* COM_MULTIPORT */ 1189 if (unit == comconsole) 1190 kprintf(", console"); 1191 if (COM_IIR_TXRDYBUG(flags)) 1192 kprintf(" with a bogus IIR_TXRDY register"); 1193 kprintf("\n"); 1194 1195 if (!sio_registered) { 1196 register_swi(SWI_TTY, siopoll, NULL ,"swi_siopoll", NULL); 1197 sio_registered = TRUE; 1198 } 1199 minorbase = UNIT_TO_MINOR(unit); 1200 make_dev(&sio_ops, minorbase, 1201 UID_ROOT, GID_WHEEL, 0600, "ttyd%r", unit); 1202 make_dev(&sio_ops, minorbase | CONTROL_INIT_STATE, 1203 UID_ROOT, GID_WHEEL, 0600, "ttyid%r", unit); 1204 make_dev(&sio_ops, minorbase | CONTROL_LOCK_STATE, 1205 UID_ROOT, GID_WHEEL, 0600, "ttyld%r", unit); 1206 make_dev(&sio_ops, minorbase | CALLOUT_MASK, 1207 UID_UUCP, GID_DIALER, 0660, "cuaa%r", unit); 1208 make_dev(&sio_ops, minorbase | CALLOUT_MASK | CONTROL_INIT_STATE, 1209 UID_UUCP, GID_DIALER, 0660, "cuaia%r", unit); 1210 make_dev(&sio_ops, minorbase | CALLOUT_MASK | CONTROL_LOCK_STATE, 1211 UID_UUCP, GID_DIALER, 0660, "cuala%r", unit); 1212 com->flags = flags; 1213 com->pps.ppscap = PPS_CAPTUREASSERT | PPS_CAPTURECLEAR; 1214 pps_init(&com->pps); 1215 1216 rid = 0; 1217 com->irqres = bus_alloc_resource(dev, SYS_RES_IRQ, &rid, 0ul, ~0ul, 1, 1218 RF_ACTIVE); 1219 if (com->irqres) { 1220 ret = BUS_SETUP_INTR(device_get_parent(dev), dev, 1221 com->irqres, INTR_MPSAFE, siointr, com, 1222 &com->cookie, NULL); 1223 if (ret) 1224 device_printf(dev, "could not activate interrupt\n"); 1225 #if defined(DDB) && (defined(BREAK_TO_DEBUGGER) || \ 1226 defined(ALT_BREAK_TO_DEBUGGER)) 1227 /* 1228 * Enable interrupts for early break-to-debugger support 1229 * on the console. 1230 */ 1231 if (ret == 0 && unit == comconsole) 1232 outb(siocniobase + com_ier, IER_ERXRDY | IER_ERLS | 1233 IER_EMSC); 1234 #endif 1235 } 1236 1237 lwkt_reltoken(&tty_token); 1238 return (0); 1239 } 1240 1241 static int 1242 sioopen(struct dev_open_args *ap) 1243 { 1244 cdev_t dev = ap->a_head.a_dev; 1245 struct com_s *com; 1246 int error; 1247 int mynor; 1248 struct tty *tp; 1249 int unit; 1250 1251 mynor = minor(dev); 1252 unit = MINOR_TO_UNIT(mynor); 1253 com = com_addr(unit); 1254 if (com == NULL) 1255 return (ENXIO); 1256 if (com->gone) 1257 return (ENXIO); 1258 if (mynor & CONTROL_MASK) 1259 return (0); 1260 lwkt_gettoken(&tty_token); 1261 tp = dev->si_tty = com->tp = ttymalloc(com->tp); 1262 crit_enter(); 1263 /* 1264 * We jump to this label after all non-interrupted sleeps to pick 1265 * up any changes of the device state. 1266 */ 1267 open_top: 1268 while (com->state & CS_DTR_OFF) { 1269 error = tsleep(&com->dtr_wait, PCATCH, "siodtr", 0); 1270 if (com_addr(unit) == NULL) { 1271 crit_exit(); 1272 lwkt_reltoken(&tty_token); 1273 return (ENXIO); 1274 } 1275 if (error != 0 || com->gone) 1276 goto out; 1277 } 1278 if (tp->t_state & TS_ISOPEN) { 1279 /* 1280 * The device is open, so everything has been initialized. 1281 * Handle conflicts. 1282 */ 1283 if (mynor & CALLOUT_MASK) { 1284 if (!com->active_out) { 1285 error = EBUSY; 1286 goto out; 1287 } 1288 } else { 1289 if (com->active_out) { 1290 if (ap->a_oflags & O_NONBLOCK) { 1291 error = EBUSY; 1292 goto out; 1293 } 1294 error = tsleep(&com->active_out, 1295 PCATCH, "siobi", 0); 1296 if (com_addr(unit) == NULL) { 1297 crit_exit(); 1298 lwkt_reltoken(&tty_token); 1299 return (ENXIO); 1300 } 1301 if (error != 0 || com->gone) 1302 goto out; 1303 goto open_top; 1304 } 1305 } 1306 if (tp->t_state & TS_XCLUDE && priv_check_cred(ap->a_cred, PRIV_ROOT, 0)) { 1307 error = EBUSY; 1308 goto out; 1309 } 1310 } else { 1311 /* 1312 * The device isn't open, so there are no conflicts. 1313 * Initialize it. Initialization is done twice in many 1314 * cases: to preempt sleeping callin opens if we are 1315 * callout, and to complete a callin open after DCD rises. 1316 */ 1317 tp->t_oproc = comstart; 1318 tp->t_param = comparam; 1319 tp->t_stop = comstop; 1320 tp->t_dev = dev; 1321 tp->t_termios = mynor & CALLOUT_MASK 1322 ? com->it_out : com->it_in; 1323 (void)commctl(com, TIOCM_DTR | TIOCM_RTS, DMSET); 1324 com->poll = com->no_irq; 1325 com->poll_output = com->loses_outints; 1326 ++com->wopeners; 1327 error = comparam(tp, &tp->t_termios); 1328 --com->wopeners; 1329 if (error != 0) 1330 goto out; 1331 /* 1332 * XXX we should goto open_top if comparam() slept. 1333 */ 1334 if (com->hasfifo) { 1335 /* 1336 * (Re)enable and drain fifos. 1337 * 1338 * Certain SMC chips cause problems if the fifos 1339 * are enabled while input is ready. Turn off the 1340 * fifo if necessary to clear the input. We test 1341 * the input ready bit after enabling the fifos 1342 * since we've already enabled them in comparam() 1343 * and to handle races between enabling and fresh 1344 * input. 1345 */ 1346 while (TRUE) { 1347 sio_setreg(com, com_fifo, 1348 FIFO_RCV_RST | FIFO_XMT_RST 1349 | com->fifo_image); 1350 /* 1351 * XXX the delays are for superstitious 1352 * historical reasons. It must be less than 1353 * the character time at the maximum 1354 * supported speed (87 usec at 115200 bps 1355 * 8N1). Otherwise we might loop endlessly 1356 * if data is streaming in. We used to use 1357 * delays of 100. That usually worked 1358 * because DELAY(100) used to usually delay 1359 * for about 85 usec instead of 100. 1360 */ 1361 DELAY(50); 1362 if (!(inb(com->line_status_port) & LSR_RXRDY)) 1363 break; 1364 sio_setreg(com, com_fifo, 0); 1365 DELAY(50); 1366 (void) inb(com->data_port); 1367 } 1368 } 1369 1370 com_lock(); 1371 (void) inb(com->line_status_port); 1372 (void) inb(com->data_port); 1373 com->prev_modem_status = com->last_modem_status 1374 = inb(com->modem_status_port); 1375 if (COM_IIR_TXRDYBUG(com->flags)) { 1376 outb(com->intr_ctl_port, IER_ERXRDY | IER_ERLS 1377 | IER_EMSC); 1378 } else { 1379 outb(com->intr_ctl_port, IER_ERXRDY | IER_ETXRDY 1380 | IER_ERLS | IER_EMSC); 1381 } 1382 com_unlock(); 1383 /* 1384 * Handle initial DCD. Callout devices get a fake initial 1385 * DCD (trapdoor DCD). If we are callout, then any sleeping 1386 * callin opens get woken up and resume sleeping on "siobi" 1387 * instead of "siodcd". 1388 */ 1389 /* 1390 * XXX `mynor & CALLOUT_MASK' should be 1391 * `tp->t_cflag & (SOFT_CARRIER | TRAPDOOR_CARRIER) where 1392 * TRAPDOOR_CARRIER is the default initial state for callout 1393 * devices and SOFT_CARRIER is like CLOCAL except it hides 1394 * the true carrier. 1395 */ 1396 if (com->prev_modem_status & MSR_DCD || mynor & CALLOUT_MASK) 1397 (*linesw[tp->t_line].l_modem)(tp, 1); 1398 } 1399 /* 1400 * Wait for DCD if necessary. 1401 */ 1402 if (!(tp->t_state & TS_CARR_ON) && !(mynor & CALLOUT_MASK) 1403 && !(tp->t_cflag & CLOCAL) && !(ap->a_oflags & O_NONBLOCK)) { 1404 ++com->wopeners; 1405 error = tsleep(TSA_CARR_ON(tp), PCATCH, "siodcd", 0); 1406 if (com_addr(unit) == NULL) { 1407 crit_exit(); 1408 lwkt_reltoken(&tty_token); 1409 return (ENXIO); 1410 } 1411 --com->wopeners; 1412 if (error != 0 || com->gone) 1413 goto out; 1414 goto open_top; 1415 } 1416 error = (*linesw[tp->t_line].l_open)(dev, tp); 1417 disc_optim(tp, &tp->t_termios, com); 1418 if (tp->t_state & TS_ISOPEN && mynor & CALLOUT_MASK) 1419 com->active_out = TRUE; 1420 siosettimeout(); 1421 out: 1422 crit_exit(); 1423 if (!(tp->t_state & TS_ISOPEN) && com->wopeners == 0) 1424 comhardclose(com); 1425 lwkt_reltoken(&tty_token); 1426 return (error); 1427 } 1428 1429 static int 1430 sioclose(struct dev_close_args *ap) 1431 { 1432 cdev_t dev = ap->a_head.a_dev; 1433 struct com_s *com; 1434 int mynor; 1435 struct tty *tp; 1436 1437 mynor = minor(dev); 1438 if (mynor & CONTROL_MASK) 1439 return (0); 1440 lwkt_gettoken(&tty_token); 1441 com = com_addr(MINOR_TO_UNIT(mynor)); 1442 if (com == NULL) { 1443 lwkt_reltoken(&tty_token); 1444 return (ENODEV); 1445 } 1446 tp = com->tp; 1447 crit_enter(); 1448 (*linesw[tp->t_line].l_close)(tp, ap->a_fflag); 1449 disc_optim(tp, &tp->t_termios, com); 1450 comstop(tp, FREAD | FWRITE); 1451 comhardclose(com); 1452 ttyclose(tp); 1453 siosettimeout(); 1454 crit_exit(); 1455 if (com->gone) { 1456 kprintf("sio%d: gone\n", com->unit); 1457 crit_enter(); 1458 if (com->ibuf != NULL) 1459 kfree(com->ibuf, M_DEVBUF); 1460 bzero(tp, sizeof *tp); 1461 crit_exit(); 1462 } 1463 lwkt_reltoken(&tty_token); 1464 return (0); 1465 } 1466 1467 static void 1468 comhardclose(struct com_s *com) 1469 { 1470 struct tty *tp; 1471 int unit; 1472 1473 unit = com->unit; 1474 crit_enter(); 1475 lwkt_gettoken(&tty_token); 1476 com->poll = FALSE; 1477 com->poll_output = FALSE; 1478 com->do_timestamp = FALSE; 1479 com->do_dcd_timestamp = FALSE; 1480 com->pps.ppsparam.mode = 0; 1481 sio_setreg(com, com_cfcr, com->cfcr_image &= ~CFCR_SBREAK); 1482 tp = com->tp; 1483 1484 #if defined(DDB) && (defined(BREAK_TO_DEBUGGER) || \ 1485 defined(ALT_BREAK_TO_DEBUGGER)) 1486 /* 1487 * Leave interrupts enabled and don't clear DTR if this is the 1488 * console. This allows us to detect break-to-debugger events 1489 * while the console device is closed. 1490 */ 1491 if (com->unit != comconsole) 1492 #endif 1493 { 1494 sio_setreg(com, com_ier, 0); 1495 if (tp->t_cflag & HUPCL 1496 /* 1497 * XXX we will miss any carrier drop between here and the 1498 * next open. Perhaps we should watch DCD even when the 1499 * port is closed; it is not sufficient to check it at 1500 * the next open because it might go up and down while 1501 * we're not watching. 1502 */ 1503 || (!com->active_out 1504 && !(com->prev_modem_status & MSR_DCD) 1505 && !(com->it_in.c_cflag & CLOCAL)) 1506 || !(tp->t_state & TS_ISOPEN)) { 1507 (void)commctl(com, TIOCM_DTR, DMBIC); 1508 if (com->dtr_wait != 0 && !(com->state & CS_DTR_OFF)) { 1509 callout_reset(&com->dtr_ch, com->dtr_wait, 1510 siodtrwakeup, com); 1511 com->state |= CS_DTR_OFF; 1512 } 1513 } 1514 } 1515 if (com->hasfifo) { 1516 /* 1517 * Disable fifos so that they are off after controlled 1518 * reboots. Some BIOSes fail to detect 16550s when the 1519 * fifos are enabled. 1520 */ 1521 sio_setreg(com, com_fifo, 0); 1522 } 1523 com->active_out = FALSE; 1524 wakeup(&com->active_out); 1525 wakeup(TSA_CARR_ON(tp)); /* restart any wopeners */ 1526 lwkt_reltoken(&tty_token); 1527 crit_exit(); 1528 } 1529 1530 static int 1531 sioread(struct dev_read_args *ap) 1532 { 1533 cdev_t dev = ap->a_head.a_dev; 1534 int mynor, ret; 1535 struct com_s *com; 1536 1537 lwkt_gettoken(&tty_token); 1538 mynor = minor(dev); 1539 if (mynor & CONTROL_MASK) { 1540 lwkt_reltoken(&tty_token); 1541 return (ENODEV); 1542 } 1543 com = com_addr(MINOR_TO_UNIT(mynor)); 1544 if (com == NULL || com->gone) { 1545 lwkt_reltoken(&tty_token); 1546 return (ENODEV); 1547 } 1548 ret = ((*linesw[com->tp->t_line].l_read)(com->tp, ap->a_uio, ap->a_ioflag)); 1549 lwkt_reltoken(&tty_token); 1550 return ret; 1551 } 1552 1553 static int 1554 siowrite(struct dev_write_args *ap) 1555 { 1556 cdev_t dev = ap->a_head.a_dev; 1557 int mynor; 1558 struct com_s *com; 1559 int unit, ret; 1560 1561 lwkt_gettoken(&tty_token); 1562 mynor = minor(dev); 1563 if (mynor & CONTROL_MASK) { 1564 lwkt_reltoken(&tty_token); 1565 return (ENODEV); 1566 } 1567 1568 unit = MINOR_TO_UNIT(mynor); 1569 com = com_addr(unit); 1570 if (com == NULL || com->gone) { 1571 lwkt_reltoken(&tty_token); 1572 return (ENODEV); 1573 } 1574 /* 1575 * (XXX) We disallow virtual consoles if the physical console is 1576 * a serial port. This is in case there is a display attached that 1577 * is not the console. In that situation we don't need/want the X 1578 * server taking over the console. 1579 */ 1580 if (constty != NULL && unit == comconsole) 1581 constty = NULL; 1582 ret = ((*linesw[com->tp->t_line].l_write)(com->tp, ap->a_uio, ap->a_ioflag)); 1583 lwkt_reltoken(&tty_token); 1584 return ret; 1585 } 1586 1587 static void 1588 siobusycheck(void *chan) 1589 { 1590 struct com_s *com; 1591 1592 lwkt_gettoken(&tty_token); 1593 com = (struct com_s *)chan; 1594 1595 /* 1596 * Clear TS_BUSY if low-level output is complete. 1597 * spl locking is sufficient because siointr1() does not set CS_BUSY. 1598 * If siointr1() clears CS_BUSY after we look at it, then we'll get 1599 * called again. Reading the line status port outside of siointr1() 1600 * is safe because CS_BUSY is clear so there are no output interrupts 1601 * to lose. 1602 */ 1603 crit_enter(); 1604 if (com->state & CS_BUSY) 1605 com->extra_state &= ~CSE_BUSYCHECK; /* False alarm. */ 1606 else if ((inb(com->line_status_port) & (LSR_TSRE | LSR_TXRDY)) 1607 == (LSR_TSRE | LSR_TXRDY)) { 1608 com->tp->t_state &= ~TS_BUSY; 1609 ttwwakeup(com->tp); 1610 com->extra_state &= ~CSE_BUSYCHECK; 1611 } else { 1612 callout_reset(&com->busy_ch, hz / 100, siobusycheck, com); 1613 } 1614 crit_exit(); 1615 lwkt_reltoken(&tty_token); 1616 } 1617 1618 static u_int 1619 siodivisor(u_long rclk, speed_t speed) 1620 { 1621 long actual_speed; 1622 u_int divisor; 1623 int error; 1624 1625 if (speed == 0 || speed > ((speed_t)-1 - 1) / 8) 1626 return (0); 1627 divisor = (rclk / (8UL * speed) + 1) / 2; 1628 if (divisor == 0 || divisor >= 65536) 1629 return (0); 1630 actual_speed = rclk / (16UL * divisor); 1631 1632 /* 10 times error in percent: */ 1633 error = ((actual_speed - (long)speed) * 2000 / (long)speed + 1) / 2; 1634 1635 /* 3.0% maximum error tolerance: */ 1636 if (error < -30 || error > 30) 1637 return (0); 1638 1639 return (divisor); 1640 } 1641 1642 static void 1643 siodtrwakeup(void *chan) 1644 { 1645 struct com_s *com; 1646 1647 lwkt_gettoken(&tty_token); 1648 com = (struct com_s *)chan; 1649 com->state &= ~CS_DTR_OFF; 1650 wakeup(&com->dtr_wait); 1651 lwkt_reltoken(&tty_token); 1652 } 1653 1654 /* 1655 * NOTE: Normally called with tty_token held but might not be when 1656 * operating as the console. 1657 * 1658 * Must be called with com_lock 1659 */ 1660 static void 1661 sioinput(struct com_s *com) 1662 { 1663 u_char *buf; 1664 int incc; 1665 u_char line_status; 1666 int recv_data; 1667 struct tty *tp; 1668 1669 buf = com->ibuf; 1670 tp = com->tp; 1671 if (!(tp->t_state & TS_ISOPEN) || !(tp->t_cflag & CREAD)) { 1672 com_events -= (com->iptr - com->ibuf); 1673 com->iptr = com->ibuf; 1674 return; 1675 } 1676 if (tp->t_state & TS_CAN_BYPASS_L_RINT) { 1677 /* 1678 * Avoid the grotesquely inefficient lineswitch routine 1679 * (ttyinput) in "raw" mode. It usually takes about 450 1680 * instructions (that's without canonical processing or echo!). 1681 * slinput is reasonably fast (usually 40 instructions plus 1682 * call overhead). 1683 */ 1684 do { 1685 com_unlock(); 1686 incc = com->iptr - buf; 1687 if (tp->t_rawq.c_cc + incc > tp->t_ihiwat 1688 && (com->state & CS_RTS_IFLOW 1689 || tp->t_iflag & IXOFF) 1690 && !(tp->t_state & TS_TBLOCK)) 1691 ttyblock(tp); 1692 com->delta_error_counts[CE_TTY_BUF_OVERFLOW] 1693 += b_to_q((char *)buf, incc, &tp->t_rawq); 1694 buf += incc; 1695 tk_nin += incc; 1696 tk_rawcc += incc; 1697 tp->t_rawcc += incc; 1698 ttwakeup(tp); 1699 if (tp->t_state & TS_TTSTOP 1700 && (tp->t_iflag & IXANY 1701 || tp->t_cc[VSTART] == tp->t_cc[VSTOP])) { 1702 tp->t_state &= ~TS_TTSTOP; 1703 tp->t_lflag &= ~FLUSHO; 1704 comstart(tp); 1705 } 1706 com_lock(); 1707 } while (buf < com->iptr); 1708 } else { 1709 do { 1710 com_unlock(); 1711 line_status = buf[com->ierroff]; 1712 recv_data = *buf++; 1713 if (line_status 1714 & (LSR_BI | LSR_FE | LSR_OE | LSR_PE)) { 1715 if (line_status & LSR_BI) 1716 recv_data |= TTY_BI; 1717 if (line_status & LSR_FE) 1718 recv_data |= TTY_FE; 1719 if (line_status & LSR_OE) 1720 recv_data |= TTY_OE; 1721 if (line_status & LSR_PE) 1722 recv_data |= TTY_PE; 1723 } 1724 (*linesw[tp->t_line].l_rint)(recv_data, tp); 1725 com_lock(); 1726 } while (buf < com->iptr); 1727 } 1728 com_events -= (com->iptr - com->ibuf); 1729 com->iptr = com->ibuf; 1730 1731 /* 1732 * There is now room for another low-level buffer full of input, 1733 * so enable RTS if it is now disabled and there is room in the 1734 * high-level buffer. 1735 */ 1736 if ((com->state & CS_RTS_IFLOW) && !(com->mcr_image & MCR_RTS) && 1737 !(tp->t_state & TS_TBLOCK)) 1738 outb(com->modem_ctl_port, com->mcr_image |= MCR_RTS); 1739 } 1740 1741 void 1742 siointr(void *arg) 1743 { 1744 lwkt_gettoken(&tty_token); 1745 #ifndef COM_MULTIPORT 1746 com_lock(); 1747 siointr1((struct com_s *) arg); 1748 com_unlock(); 1749 #else /* COM_MULTIPORT */ 1750 bool_t possibly_more_intrs; 1751 int unit; 1752 struct com_s *com; 1753 1754 /* 1755 * Loop until there is no activity on any port. This is necessary 1756 * to get an interrupt edge more than to avoid another interrupt. 1757 * If the IRQ signal is just an OR of the IRQ signals from several 1758 * devices, then the edge from one may be lost because another is 1759 * on. 1760 */ 1761 com_lock(); 1762 do { 1763 possibly_more_intrs = FALSE; 1764 for (unit = 0; unit < sio_numunits; ++unit) { 1765 com = com_addr(unit); 1766 /* 1767 * XXX com_lock(); 1768 * would it work here, or be counter-productive? 1769 */ 1770 if (com != NULL 1771 && !com->gone 1772 && (inb(com->int_id_port) & IIR_IMASK) 1773 != IIR_NOPEND) { 1774 siointr1(com); 1775 possibly_more_intrs = TRUE; 1776 } 1777 /* XXX com_unlock(); */ 1778 } 1779 } while (possibly_more_intrs); 1780 com_unlock(); 1781 #endif /* COM_MULTIPORT */ 1782 lwkt_reltoken(&tty_token); 1783 } 1784 1785 /* 1786 * Called with tty_token held and com_lock held. 1787 */ 1788 static void 1789 siointr1(struct com_s *com) 1790 { 1791 u_char line_status; 1792 u_char modem_status; 1793 u_char *ioptr; 1794 u_char recv_data; 1795 u_char int_ctl; 1796 u_char int_ctl_new; 1797 u_int count; 1798 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 com_unlock(); 1842 breakpoint(); 1843 com_lock(); 1844 brk_state1 = brk_state2 = 0; 1845 goto cont; 1846 } else 1847 brk_state2 = 0; 1848 } else 1849 brk_state1 = 0; 1850 } 1851 #endif 1852 if (line_status & (LSR_BI | LSR_FE | LSR_PE)) { 1853 /* 1854 * Don't store BI if IGNBRK or FE/PE if IGNPAR. 1855 * Otherwise, push the work to a higher level 1856 * (to handle PARMRK) if we're bypassing. 1857 * Otherwise, convert BI/FE and PE+INPCK to 0. 1858 * 1859 * This makes bypassing work right in the 1860 * usual "raw" case (IGNBRK set, and IGNPAR 1861 * and INPCK clear). 1862 * 1863 * Note: BI together with FE/PE means just BI. 1864 */ 1865 if (line_status & LSR_BI) { 1866 #if defined(DDB) && defined(BREAK_TO_DEBUGGER) 1867 if (com->unit == comconsole) { 1868 com_unlock(); 1869 breakpoint(); 1870 com_lock(); 1871 goto cont; 1872 } 1873 #endif 1874 if (com->tp == NULL 1875 || com->tp->t_iflag & IGNBRK) 1876 goto cont; 1877 } else { 1878 if (com->tp == NULL 1879 || com->tp->t_iflag & IGNPAR) 1880 goto cont; 1881 } 1882 if (com->tp->t_state & TS_CAN_BYPASS_L_RINT 1883 && (line_status & (LSR_BI | LSR_FE) 1884 || com->tp->t_iflag & INPCK)) 1885 recv_data = 0; 1886 } 1887 ++com->bytes_in; 1888 if (com->hotchar != 0 && recv_data == com->hotchar) 1889 setsofttty(); 1890 ioptr = com->iptr; 1891 if (ioptr >= com->ibufend) 1892 CE_RECORD(com, CE_INTERRUPT_BUF_OVERFLOW); 1893 else { 1894 if (com->do_timestamp) 1895 microtime(&com->timestamp); 1896 ++com_events; 1897 schedsofttty(); 1898 #if 0 /* for testing input latency vs efficiency */ 1899 if (com->iptr - com->ibuf == 8) 1900 setsofttty(); 1901 #endif 1902 ioptr[0] = recv_data; 1903 ioptr[com->ierroff] = line_status; 1904 com->iptr = ++ioptr; 1905 if (ioptr == com->ihighwater 1906 && com->state & CS_RTS_IFLOW) 1907 outb(com->modem_ctl_port, 1908 com->mcr_image &= ~MCR_RTS); 1909 if (line_status & LSR_OE) 1910 CE_RECORD(com, CE_OVERRUN); 1911 } 1912 cont: 1913 /* 1914 * "& 0x7F" is to avoid the gcc-1.40 generating a slow 1915 * jump from the top of the loop to here 1916 */ 1917 line_status = inb(com->line_status_port) & 0x7F; 1918 } 1919 1920 /* modem status change? (always check before doing output) */ 1921 modem_status = inb(com->modem_status_port); 1922 if (modem_status != com->last_modem_status) { 1923 if (com->do_dcd_timestamp 1924 && !(com->last_modem_status & MSR_DCD) 1925 && modem_status & MSR_DCD) 1926 microtime(&com->dcd_timestamp); 1927 1928 /* 1929 * Schedule high level to handle DCD changes. Note 1930 * that we don't use the delta bits anywhere. Some 1931 * UARTs mess them up, and it's easy to remember the 1932 * previous bits and calculate the delta. 1933 */ 1934 com->last_modem_status = modem_status; 1935 if (!(com->state & CS_CHECKMSR)) { 1936 com_events += LOTS_OF_EVENTS; 1937 com->state |= CS_CHECKMSR; 1938 setsofttty(); 1939 } 1940 1941 /* handle CTS change immediately for crisp flow ctl */ 1942 if (com->state & CS_CTS_OFLOW) { 1943 if (modem_status & MSR_CTS) 1944 com->state |= CS_ODEVREADY; 1945 else 1946 com->state &= ~CS_ODEVREADY; 1947 } 1948 } 1949 1950 /* output queued and everything ready? */ 1951 if (line_status & LSR_TXRDY 1952 && com->state >= (CS_BUSY | CS_TTGO | CS_ODEVREADY)) { 1953 ioptr = com->obufq.l_head; 1954 if (com->tx_fifo_size > 1) { 1955 u_int ocount; 1956 1957 ocount = com->obufq.l_tail - ioptr; 1958 if (ocount > com->tx_fifo_size) 1959 ocount = com->tx_fifo_size; 1960 com->bytes_out += ocount; 1961 do 1962 outb(com->data_port, *ioptr++); 1963 while (--ocount != 0); 1964 } else { 1965 outb(com->data_port, *ioptr++); 1966 ++com->bytes_out; 1967 } 1968 com->obufq.l_head = ioptr; 1969 if (COM_IIR_TXRDYBUG(com->flags)) { 1970 int_ctl_new = int_ctl | IER_ETXRDY; 1971 } 1972 if (ioptr >= com->obufq.l_tail) { 1973 struct lbq *qp; 1974 1975 qp = com->obufq.l_next; 1976 qp->l_queued = FALSE; 1977 qp = qp->l_next; 1978 if (qp != NULL) { 1979 com->obufq.l_head = qp->l_head; 1980 com->obufq.l_tail = qp->l_tail; 1981 com->obufq.l_next = qp; 1982 } else { 1983 /* output just completed */ 1984 if (COM_IIR_TXRDYBUG(com->flags)) { 1985 int_ctl_new = int_ctl & ~IER_ETXRDY; 1986 } 1987 com->state &= ~CS_BUSY; 1988 } 1989 if (!(com->state & CS_ODONE)) { 1990 com_events += LOTS_OF_EVENTS; 1991 com->state |= CS_ODONE; 1992 setsofttty(); /* handle at high level ASAP */ 1993 } 1994 } 1995 if (COM_IIR_TXRDYBUG(com->flags) && (int_ctl != int_ctl_new)) { 1996 outb(com->intr_ctl_port, int_ctl_new); 1997 } 1998 } 1999 2000 /* finished? */ 2001 #ifndef COM_MULTIPORT 2002 if ((inb(com->int_id_port) & IIR_IMASK) == IIR_NOPEND) 2003 #endif /* COM_MULTIPORT */ 2004 { 2005 return; 2006 } 2007 } 2008 } 2009 2010 static int 2011 sioioctl(struct dev_ioctl_args *ap) 2012 { 2013 cdev_t dev = ap->a_head.a_dev; 2014 caddr_t data = ap->a_data; 2015 struct com_s *com; 2016 int error; 2017 int mynor; 2018 struct tty *tp; 2019 #if defined(COMPAT_43) || defined(COMPAT_SUNOS) 2020 u_long oldcmd; 2021 struct termios term; 2022 #endif 2023 lwkt_gettoken(&tty_token); 2024 mynor = minor(dev); 2025 2026 com = com_addr(MINOR_TO_UNIT(mynor)); 2027 if (com == NULL || com->gone) { 2028 lwkt_reltoken(&tty_token); 2029 return (ENODEV); 2030 } 2031 if (mynor & CONTROL_MASK) { 2032 struct termios *ct; 2033 2034 switch (mynor & CONTROL_MASK) { 2035 case CONTROL_INIT_STATE: 2036 ct = mynor & CALLOUT_MASK ? &com->it_out : &com->it_in; 2037 break; 2038 case CONTROL_LOCK_STATE: 2039 ct = mynor & CALLOUT_MASK ? &com->lt_out : &com->lt_in; 2040 break; 2041 default: 2042 lwkt_reltoken(&tty_token); 2043 return (ENODEV); /* /dev/nodev */ 2044 } 2045 switch (ap->a_cmd) { 2046 case TIOCSETA: 2047 error = priv_check_cred(ap->a_cred, PRIV_ROOT, 0); 2048 if (error != 0) 2049 return (error); 2050 *ct = *(struct termios *)data; 2051 lwkt_reltoken(&tty_token); 2052 return (0); 2053 case TIOCGETA: 2054 *(struct termios *)data = *ct; 2055 lwkt_reltoken(&tty_token); 2056 return (0); 2057 case TIOCGETD: 2058 *(int *)data = TTYDISC; 2059 lwkt_reltoken(&tty_token); 2060 return (0); 2061 case TIOCGWINSZ: 2062 bzero(data, sizeof(struct winsize)); 2063 lwkt_reltoken(&tty_token); 2064 return (0); 2065 default: 2066 lwkt_reltoken(&tty_token); 2067 return (ENOTTY); 2068 } 2069 } 2070 tp = com->tp; 2071 #if defined(COMPAT_43) || defined(COMPAT_SUNOS) 2072 term = tp->t_termios; 2073 oldcmd = ap->a_cmd; 2074 error = ttsetcompat(tp, &ap->a_cmd, data, &term); 2075 if (error != 0) { 2076 lwkt_reltoken(&tty_token); 2077 return (error); 2078 } 2079 if (ap->a_cmd != oldcmd) 2080 data = (caddr_t)&term; 2081 #endif 2082 if (ap->a_cmd == TIOCSETA || ap->a_cmd == TIOCSETAW || 2083 ap->a_cmd == TIOCSETAF) { 2084 int cc; 2085 struct termios *dt = (struct termios *)data; 2086 struct termios *lt = mynor & CALLOUT_MASK 2087 ? &com->lt_out : &com->lt_in; 2088 2089 dt->c_iflag = (tp->t_iflag & lt->c_iflag) 2090 | (dt->c_iflag & ~lt->c_iflag); 2091 dt->c_oflag = (tp->t_oflag & lt->c_oflag) 2092 | (dt->c_oflag & ~lt->c_oflag); 2093 dt->c_cflag = (tp->t_cflag & lt->c_cflag) 2094 | (dt->c_cflag & ~lt->c_cflag); 2095 dt->c_lflag = (tp->t_lflag & lt->c_lflag) 2096 | (dt->c_lflag & ~lt->c_lflag); 2097 for (cc = 0; cc < NCCS; ++cc) 2098 if (lt->c_cc[cc] != 0) 2099 dt->c_cc[cc] = tp->t_cc[cc]; 2100 if (lt->c_ispeed != 0) 2101 dt->c_ispeed = tp->t_ispeed; 2102 if (lt->c_ospeed != 0) 2103 dt->c_ospeed = tp->t_ospeed; 2104 } 2105 error = (*linesw[tp->t_line].l_ioctl)(tp, ap->a_cmd, data, ap->a_fflag, ap->a_cred); 2106 if (error != ENOIOCTL) { 2107 lwkt_reltoken(&tty_token); 2108 return (error); 2109 } 2110 crit_enter(); 2111 error = ttioctl(tp, ap->a_cmd, data, ap->a_fflag); 2112 disc_optim(tp, &tp->t_termios, com); 2113 if (error != ENOIOCTL) { 2114 crit_exit(); 2115 lwkt_reltoken(&tty_token); 2116 return (error); 2117 } 2118 switch (ap->a_cmd) { 2119 case TIOCSBRK: 2120 sio_setreg(com, com_cfcr, com->cfcr_image |= CFCR_SBREAK); 2121 break; 2122 case TIOCCBRK: 2123 sio_setreg(com, com_cfcr, com->cfcr_image &= ~CFCR_SBREAK); 2124 break; 2125 case TIOCSDTR: 2126 (void)commctl(com, TIOCM_DTR, DMBIS); 2127 break; 2128 case TIOCCDTR: 2129 (void)commctl(com, TIOCM_DTR, DMBIC); 2130 break; 2131 /* 2132 * XXX should disallow changing MCR_RTS if CS_RTS_IFLOW is set. The 2133 * changes get undone on the next call to comparam(). 2134 */ 2135 case TIOCMSET: 2136 (void)commctl(com, *(int *)data, DMSET); 2137 break; 2138 case TIOCMBIS: 2139 (void)commctl(com, *(int *)data, DMBIS); 2140 break; 2141 case TIOCMBIC: 2142 (void)commctl(com, *(int *)data, DMBIC); 2143 break; 2144 case TIOCMGET: 2145 *(int *)data = commctl(com, 0, DMGET); 2146 break; 2147 case TIOCMSDTRWAIT: 2148 /* must be root since the wait applies to following logins */ 2149 error = priv_check_cred(ap->a_cred, PRIV_ROOT, 0); 2150 if (error != 0) { 2151 crit_exit(); 2152 lwkt_reltoken(&tty_token); 2153 return (error); 2154 } 2155 com->dtr_wait = *(int *)data * hz / 100; 2156 break; 2157 case TIOCMGDTRWAIT: 2158 *(int *)data = com->dtr_wait * 100 / hz; 2159 break; 2160 case TIOCTIMESTAMP: 2161 com->do_timestamp = TRUE; 2162 *(struct timeval *)data = com->timestamp; 2163 break; 2164 case TIOCDCDTIMESTAMP: 2165 com->do_dcd_timestamp = TRUE; 2166 *(struct timeval *)data = com->dcd_timestamp; 2167 break; 2168 default: 2169 crit_exit(); 2170 error = pps_ioctl(ap->a_cmd, data, &com->pps); 2171 if (error == ENODEV) 2172 error = ENOTTY; 2173 lwkt_reltoken(&tty_token); 2174 return (error); 2175 } 2176 crit_exit(); 2177 lwkt_reltoken(&tty_token); 2178 return (0); 2179 } 2180 2181 static void 2182 siopoll(void *dummy, void *frame) 2183 { 2184 int unit; 2185 2186 lwkt_gettoken(&tty_token); 2187 if (com_events == 0) { 2188 lwkt_reltoken(&tty_token); 2189 return; 2190 } 2191 2192 repeat: 2193 for (unit = 0; unit < sio_numunits; ++unit) { 2194 struct com_s *com; 2195 int incc; 2196 struct tty *tp; 2197 2198 com = com_addr(unit); 2199 if (com == NULL) 2200 continue; 2201 tp = com->tp; 2202 if (tp == NULL || com->gone) { 2203 /* 2204 * Discard any events related to never-opened or 2205 * going-away devices. 2206 */ 2207 com_lock(); 2208 incc = com->iptr - com->ibuf; 2209 com->iptr = com->ibuf; 2210 if (com->state & CS_CHECKMSR) { 2211 incc += LOTS_OF_EVENTS; 2212 com->state &= ~CS_CHECKMSR; 2213 } 2214 com_events -= incc; 2215 com_unlock(); 2216 continue; 2217 } 2218 if (com->iptr != com->ibuf) { 2219 com_lock(); 2220 sioinput(com); 2221 com_unlock(); 2222 } 2223 if (com->state & CS_CHECKMSR) { 2224 u_char delta_modem_status; 2225 2226 com_lock(); 2227 delta_modem_status = com->last_modem_status 2228 ^ com->prev_modem_status; 2229 com->prev_modem_status = com->last_modem_status; 2230 com_events -= LOTS_OF_EVENTS; 2231 com->state &= ~CS_CHECKMSR; 2232 com_unlock(); 2233 if (delta_modem_status & MSR_DCD) 2234 (*linesw[tp->t_line].l_modem) 2235 (tp, com->prev_modem_status & MSR_DCD); 2236 } 2237 if (com->state & CS_ODONE) { 2238 com_lock(); 2239 com_events -= LOTS_OF_EVENTS; 2240 com->state &= ~CS_ODONE; 2241 com_unlock(); 2242 if (!(com->state & CS_BUSY) 2243 && !(com->extra_state & CSE_BUSYCHECK)) { 2244 callout_reset(&com->busy_ch, hz / 100, 2245 siobusycheck, com); 2246 com->extra_state |= CSE_BUSYCHECK; 2247 } 2248 (*linesw[tp->t_line].l_start)(tp); 2249 } 2250 if (com_events == 0) 2251 break; 2252 } 2253 if (com_events >= LOTS_OF_EVENTS) 2254 goto repeat; 2255 lwkt_reltoken(&tty_token); 2256 } 2257 2258 /* 2259 * Called with tty_token held but no com_lock 2260 */ 2261 static int 2262 comparam(struct tty *tp, struct termios *t) 2263 { 2264 u_int cfcr; 2265 int cflag; 2266 struct com_s *com; 2267 u_int divisor; 2268 u_char dlbh; 2269 u_char dlbl; 2270 int unit; 2271 2272 unit = DEV_TO_UNIT(tp->t_dev); 2273 com = com_addr(unit); 2274 if (com == NULL) { 2275 return (ENODEV); 2276 } 2277 2278 /* do historical conversions */ 2279 if (t->c_ispeed == 0) 2280 t->c_ispeed = t->c_ospeed; 2281 2282 /* check requested parameters */ 2283 if (t->c_ospeed == 0) 2284 divisor = 0; 2285 else { 2286 if (t->c_ispeed != t->c_ospeed) 2287 return (EINVAL); 2288 divisor = siodivisor(com->rclk, t->c_ispeed); 2289 if (divisor == 0) 2290 return (EINVAL); 2291 } 2292 2293 /* parameters are OK, convert them to the com struct and the device */ 2294 crit_enter(); 2295 if (divisor == 0) 2296 (void)commctl(com, TIOCM_DTR, DMBIC); /* hang up line */ 2297 else 2298 (void)commctl(com, TIOCM_DTR, DMBIS); 2299 cflag = t->c_cflag; 2300 switch (cflag & CSIZE) { 2301 case CS5: 2302 cfcr = CFCR_5BITS; 2303 break; 2304 case CS6: 2305 cfcr = CFCR_6BITS; 2306 break; 2307 case CS7: 2308 cfcr = CFCR_7BITS; 2309 break; 2310 default: 2311 cfcr = CFCR_8BITS; 2312 break; 2313 } 2314 if (cflag & PARENB) { 2315 cfcr |= CFCR_PENAB; 2316 if (!(cflag & PARODD)) 2317 cfcr |= CFCR_PEVEN; 2318 } 2319 if (cflag & CSTOPB) 2320 cfcr |= CFCR_STOPB; 2321 2322 if (com->hasfifo && divisor != 0) { 2323 /* 2324 * Use a fifo trigger level low enough so that the input 2325 * latency from the fifo is less than about 16 msec and 2326 * the total latency is less than about 30 msec. These 2327 * latencies are reasonable for humans. Serial comms 2328 * protocols shouldn't expect anything better since modem 2329 * latencies are larger. 2330 * 2331 * Interrupts can be held up for long periods of time 2332 * due to inefficiencies in other parts of the kernel, 2333 * certain video cards, etc. Setting the FIFO trigger 2334 * point to MEDH instead of HIGH gives us 694uS of slop 2335 * (8 character times) instead of 173uS (2 character times) 2336 * @ 115200 bps. 2337 */ 2338 com->fifo_image = t->c_ospeed <= 4800 2339 ? FIFO_ENABLE : FIFO_ENABLE | FIFO_RX_MEDH; 2340 #ifdef COM_ESP 2341 /* 2342 * The Hayes ESP card needs the fifo DMA mode bit set 2343 * in compatibility mode. If not, it will interrupt 2344 * for each character received. 2345 */ 2346 if (com->esp) 2347 com->fifo_image |= FIFO_DMA_MODE; 2348 #endif 2349 sio_setreg(com, com_fifo, com->fifo_image); 2350 } 2351 2352 /* 2353 * This returns with interrupts disabled so that we can complete 2354 * the speed change atomically. Keeping interrupts disabled is 2355 * especially important while com_data is hidden. 2356 */ 2357 (void) siosetwater(com, t->c_ispeed); 2358 2359 if (divisor != 0) { 2360 sio_setreg(com, com_cfcr, cfcr | CFCR_DLAB); 2361 /* 2362 * Only set the divisor registers if they would change, 2363 * since on some 16550 incompatibles (UMC8669F), setting 2364 * them while input is arriving them loses sync until 2365 * data stops arriving. 2366 */ 2367 dlbl = divisor & 0xFF; 2368 if (sio_getreg(com, com_dlbl) != dlbl) 2369 sio_setreg(com, com_dlbl, dlbl); 2370 dlbh = divisor >> 8; 2371 if (sio_getreg(com, com_dlbh) != dlbh) 2372 sio_setreg(com, com_dlbh, dlbh); 2373 } 2374 2375 sio_setreg(com, com_cfcr, com->cfcr_image = cfcr); 2376 2377 if (!(tp->t_state & TS_TTSTOP)) 2378 com->state |= CS_TTGO; 2379 2380 if (cflag & CRTS_IFLOW) { 2381 if (com->st16650a) { 2382 sio_setreg(com, com_cfcr, 0xbf); 2383 sio_setreg(com, com_fifo, 2384 sio_getreg(com, com_fifo) | 0x40); 2385 } 2386 com->state |= CS_RTS_IFLOW; 2387 /* 2388 * If CS_RTS_IFLOW just changed from off to on, the change 2389 * needs to be propagated to MCR_RTS. This isn't urgent, 2390 * so do it later by calling comstart() instead of repeating 2391 * a lot of code from comstart() here. 2392 */ 2393 } else if (com->state & CS_RTS_IFLOW) { 2394 com->state &= ~CS_RTS_IFLOW; 2395 /* 2396 * CS_RTS_IFLOW just changed from on to off. Force MCR_RTS 2397 * on here, since comstart() won't do it later. 2398 */ 2399 outb(com->modem_ctl_port, com->mcr_image |= MCR_RTS); 2400 if (com->st16650a) { 2401 sio_setreg(com, com_cfcr, 0xbf); 2402 sio_setreg(com, com_fifo, 2403 sio_getreg(com, com_fifo) & ~0x40); 2404 } 2405 } 2406 2407 2408 /* 2409 * Set up state to handle output flow control. 2410 * XXX - worth handling MDMBUF (DCD) flow control at the lowest level? 2411 * Now has 10+ msec latency, while CTS flow has 50- usec latency. 2412 */ 2413 com->state |= CS_ODEVREADY; 2414 com->state &= ~CS_CTS_OFLOW; 2415 if (cflag & CCTS_OFLOW) { 2416 com->state |= CS_CTS_OFLOW; 2417 if (!(com->last_modem_status & MSR_CTS)) 2418 com->state &= ~CS_ODEVREADY; 2419 if (com->st16650a) { 2420 sio_setreg(com, com_cfcr, 0xbf); 2421 sio_setreg(com, com_fifo, 2422 sio_getreg(com, com_fifo) | 0x80); 2423 } 2424 } else { 2425 if (com->st16650a) { 2426 sio_setreg(com, com_cfcr, 0xbf); 2427 sio_setreg(com, com_fifo, 2428 sio_getreg(com, com_fifo) & ~0x80); 2429 } 2430 } 2431 2432 sio_setreg(com, com_cfcr, com->cfcr_image); 2433 2434 /* XXX shouldn't call functions while intrs are disabled. */ 2435 disc_optim(tp, t, com); 2436 /* 2437 * Recover from fiddling with CS_TTGO. We used to call siointr1() 2438 * unconditionally, but that defeated the careful discarding of 2439 * stale input in sioopen(). 2440 */ 2441 if (com->state >= (CS_BUSY | CS_TTGO)) { 2442 com_lock(); 2443 siointr1(com); 2444 com_unlock(); 2445 } 2446 crit_exit(); 2447 comstart(tp); 2448 if (com->ibufold != NULL) { 2449 kfree(com->ibufold, M_DEVBUF); 2450 com->ibufold = NULL; 2451 } 2452 return (0); 2453 } 2454 2455 /* 2456 * called with tty_token held 2457 */ 2458 static int 2459 siosetwater(struct com_s *com, speed_t speed) 2460 { 2461 int cp4ticks; 2462 u_char *ibuf; 2463 int ibufsize; 2464 struct tty *tp; 2465 2466 /* 2467 * Make the buffer size large enough to handle a softtty interrupt 2468 * latency of about 2 ticks without loss of throughput or data 2469 * (about 3 ticks if input flow control is not used or not honoured, 2470 * but a bit less for CS5-CS7 modes). 2471 */ 2472 cp4ticks = speed / 10 / hz * 4; 2473 for (ibufsize = 128; ibufsize < cp4ticks;) 2474 ibufsize <<= 1; 2475 if (ibufsize == com->ibufsize) 2476 return (0); 2477 2478 /* 2479 * Allocate input buffer. The extra factor of 2 in the size is 2480 * to allow for an error byte for each input byte. 2481 */ 2482 ibuf = kmalloc(2 * ibufsize, M_DEVBUF, M_WAITOK | M_ZERO); 2483 2484 /* Initialize non-critical variables. */ 2485 com->ibufold = com->ibuf; 2486 com->ibufsize = ibufsize; 2487 tp = com->tp; 2488 if (tp != NULL) { 2489 tp->t_ififosize = 2 * ibufsize; 2490 tp->t_ispeedwat = (speed_t)-1; 2491 tp->t_ospeedwat = (speed_t)-1; 2492 } 2493 2494 /* 2495 * Read current input buffer. 2496 */ 2497 com_lock(); 2498 if (com->iptr != com->ibuf) 2499 sioinput(com); 2500 2501 /*- 2502 * Initialize critical variables, including input buffer watermarks. 2503 * The external device is asked to stop sending when the buffer 2504 * exactly reaches high water, or when the high level requests it. 2505 * The high level is notified immediately (rather than at a later 2506 * clock tick) when this watermark is reached. 2507 * The buffer size is chosen so the watermark should almost never 2508 * be reached. 2509 * The low watermark is invisibly 0 since the buffer is always 2510 * emptied all at once. 2511 */ 2512 com->iptr = com->ibuf = ibuf; 2513 com->ibufend = ibuf + ibufsize; 2514 com->ierroff = ibufsize; 2515 com->ihighwater = ibuf + 3 * ibufsize / 4; 2516 com_unlock(); 2517 return (0); 2518 } 2519 2520 static void 2521 comstart(struct tty *tp) 2522 { 2523 struct com_s *com; 2524 int unit; 2525 2526 lwkt_gettoken(&tty_token); 2527 unit = DEV_TO_UNIT(tp->t_dev); 2528 com = com_addr(unit); 2529 if (com == NULL) { 2530 lwkt_reltoken(&tty_token); 2531 return; 2532 } 2533 crit_enter(); 2534 com_lock(); 2535 if (tp->t_state & TS_TTSTOP) 2536 com->state &= ~CS_TTGO; 2537 else 2538 com->state |= CS_TTGO; 2539 if (tp->t_state & TS_TBLOCK) { 2540 if (com->mcr_image & MCR_RTS && com->state & CS_RTS_IFLOW) 2541 outb(com->modem_ctl_port, com->mcr_image &= ~MCR_RTS); 2542 } else { 2543 if (!(com->mcr_image & MCR_RTS) && com->iptr < com->ihighwater 2544 && com->state & CS_RTS_IFLOW) 2545 outb(com->modem_ctl_port, com->mcr_image |= MCR_RTS); 2546 } 2547 com_unlock(); 2548 if (tp->t_state & (TS_TIMEOUT | TS_TTSTOP)) { 2549 ttwwakeup(tp); 2550 crit_exit(); 2551 lwkt_reltoken(&tty_token); 2552 return; 2553 } 2554 if (tp->t_outq.c_cc != 0) { 2555 struct lbq *qp; 2556 struct lbq *next; 2557 2558 if (!com->obufs[0].l_queued) { 2559 com->obufs[0].l_tail 2560 = com->obuf1 + q_to_b(&tp->t_outq, com->obuf1, 2561 sizeof com->obuf1); 2562 com->obufs[0].l_next = NULL; 2563 com->obufs[0].l_queued = TRUE; 2564 com_lock(); 2565 if (com->state & CS_BUSY) { 2566 qp = com->obufq.l_next; 2567 while ((next = qp->l_next) != NULL) 2568 qp = next; 2569 qp->l_next = &com->obufs[0]; 2570 } else { 2571 com->obufq.l_head = com->obufs[0].l_head; 2572 com->obufq.l_tail = com->obufs[0].l_tail; 2573 com->obufq.l_next = &com->obufs[0]; 2574 com->state |= CS_BUSY; 2575 } 2576 com_unlock(); 2577 } 2578 if (tp->t_outq.c_cc != 0 && !com->obufs[1].l_queued) { 2579 com->obufs[1].l_tail 2580 = com->obuf2 + q_to_b(&tp->t_outq, com->obuf2, 2581 sizeof com->obuf2); 2582 com->obufs[1].l_next = NULL; 2583 com->obufs[1].l_queued = TRUE; 2584 com_lock(); 2585 if (com->state & CS_BUSY) { 2586 qp = com->obufq.l_next; 2587 while ((next = qp->l_next) != NULL) 2588 qp = next; 2589 qp->l_next = &com->obufs[1]; 2590 } else { 2591 com->obufq.l_head = com->obufs[1].l_head; 2592 com->obufq.l_tail = com->obufs[1].l_tail; 2593 com->obufq.l_next = &com->obufs[1]; 2594 com->state |= CS_BUSY; 2595 } 2596 com_unlock(); 2597 } 2598 tp->t_state |= TS_BUSY; 2599 } 2600 com_lock(); 2601 if (com->state >= (CS_BUSY | CS_TTGO)) 2602 siointr1(com); /* fake interrupt to start output */ 2603 com_unlock(); 2604 ttwwakeup(tp); 2605 crit_exit(); 2606 lwkt_reltoken(&tty_token); 2607 } 2608 2609 static void 2610 comstop(struct tty *tp, int rw) 2611 { 2612 struct com_s *com; 2613 2614 lwkt_gettoken(&tty_token); 2615 com = com_addr(DEV_TO_UNIT(tp->t_dev)); 2616 if (com == NULL || com->gone) { 2617 lwkt_reltoken(&tty_token); 2618 return; 2619 } 2620 com_lock(); 2621 if (rw & FWRITE) { 2622 if (com->hasfifo) 2623 #ifdef COM_ESP 2624 /* XXX avoid h/w bug. */ 2625 if (!com->esp) 2626 #endif 2627 sio_setreg(com, com_fifo, 2628 FIFO_XMT_RST | com->fifo_image); 2629 com->obufs[0].l_queued = FALSE; 2630 com->obufs[1].l_queued = FALSE; 2631 if (com->state & CS_ODONE) 2632 com_events -= LOTS_OF_EVENTS; 2633 com->state &= ~(CS_ODONE | CS_BUSY); 2634 com->tp->t_state &= ~TS_BUSY; 2635 } 2636 if (rw & FREAD) { 2637 if (com->hasfifo) 2638 #ifdef COM_ESP 2639 /* XXX avoid h/w bug. */ 2640 if (!com->esp) 2641 #endif 2642 sio_setreg(com, com_fifo, 2643 FIFO_RCV_RST | com->fifo_image); 2644 com_events -= (com->iptr - com->ibuf); 2645 com->iptr = com->ibuf; 2646 } 2647 com_unlock(); 2648 comstart(tp); 2649 lwkt_reltoken(&tty_token); 2650 } 2651 2652 static int 2653 commctl(struct com_s *com, int bits, int how) 2654 { 2655 int mcr; 2656 int msr; 2657 2658 lwkt_gettoken(&tty_token); 2659 if (how == DMGET) { 2660 bits = TIOCM_LE; /* XXX - always enabled while open */ 2661 mcr = com->mcr_image; 2662 if (mcr & MCR_DTR) 2663 bits |= TIOCM_DTR; 2664 if (mcr & MCR_RTS) 2665 bits |= TIOCM_RTS; 2666 msr = com->prev_modem_status; 2667 if (msr & MSR_CTS) 2668 bits |= TIOCM_CTS; 2669 if (msr & MSR_DCD) 2670 bits |= TIOCM_CD; 2671 if (msr & MSR_DSR) 2672 bits |= TIOCM_DSR; 2673 /* 2674 * XXX - MSR_RI is naturally volatile, and we make MSR_TERI 2675 * more volatile by reading the modem status a lot. Perhaps 2676 * we should latch both bits until the status is read here. 2677 */ 2678 if (msr & (MSR_RI | MSR_TERI)) 2679 bits |= TIOCM_RI; 2680 lwkt_reltoken(&tty_token); 2681 return (bits); 2682 } 2683 mcr = 0; 2684 if (bits & TIOCM_DTR) 2685 mcr |= MCR_DTR; 2686 if (bits & TIOCM_RTS) 2687 mcr |= MCR_RTS; 2688 if (com->gone) { 2689 lwkt_reltoken(&tty_token); 2690 return(0); 2691 } 2692 com_lock(); 2693 switch (how) { 2694 case DMSET: 2695 outb(com->modem_ctl_port, 2696 com->mcr_image = mcr | (com->mcr_image & MCR_IENABLE)); 2697 break; 2698 case DMBIS: 2699 outb(com->modem_ctl_port, com->mcr_image |= mcr); 2700 break; 2701 case DMBIC: 2702 outb(com->modem_ctl_port, com->mcr_image &= ~mcr); 2703 break; 2704 } 2705 com_unlock(); 2706 lwkt_reltoken(&tty_token); 2707 return (0); 2708 } 2709 2710 /* 2711 * NOTE: Must be called with tty_token held 2712 */ 2713 static void 2714 siosettimeout(void) 2715 { 2716 struct com_s *com; 2717 bool_t someopen; 2718 int unit; 2719 2720 ASSERT_LWKT_TOKEN_HELD(&tty_token); 2721 /* 2722 * Set our timeout period to 1 second if no polled devices are open. 2723 * Otherwise set it to max(1/200, 1/hz). 2724 * Enable timeouts iff some device is open. 2725 */ 2726 callout_stop(&sio_timeout_handle); 2727 sio_timeout = hz; 2728 someopen = FALSE; 2729 for (unit = 0; unit < sio_numunits; ++unit) { 2730 com = com_addr(unit); 2731 if (com != NULL && com->tp != NULL 2732 && com->tp->t_state & TS_ISOPEN && !com->gone) { 2733 someopen = TRUE; 2734 if (com->poll || com->poll_output) { 2735 sio_timeout = hz > 200 ? hz / 200 : 1; 2736 break; 2737 } 2738 } 2739 } 2740 if (someopen) { 2741 sio_timeouts_until_log = hz / sio_timeout; 2742 callout_reset(&sio_timeout_handle, sio_timeout, 2743 comwakeup, NULL); 2744 } else { 2745 /* Flush error messages, if any. */ 2746 sio_timeouts_until_log = 1; 2747 comwakeup(NULL); 2748 callout_stop(&sio_timeout_handle); 2749 } 2750 } 2751 2752 /* 2753 * NOTE: Must be called with tty_token held 2754 */ 2755 static void 2756 comwakeup(void *chan) 2757 { 2758 struct com_s *com; 2759 int unit; 2760 2761 /* 2762 * Can be called from a callout too so just get the token 2763 */ 2764 lwkt_gettoken(&tty_token); 2765 callout_reset(&sio_timeout_handle, sio_timeout, comwakeup, NULL); 2766 2767 /* 2768 * Recover from lost output interrupts. 2769 * Poll any lines that don't use interrupts. 2770 */ 2771 for (unit = 0; unit < sio_numunits; ++unit) { 2772 com = com_addr(unit); 2773 if (com != NULL && !com->gone 2774 && (com->state >= (CS_BUSY | CS_TTGO) || com->poll)) { 2775 com_lock(); 2776 siointr1(com); 2777 com_unlock(); 2778 } 2779 } 2780 2781 /* 2782 * Check for and log errors, but not too often. 2783 */ 2784 if (--sio_timeouts_until_log > 0) { 2785 lwkt_reltoken(&tty_token); 2786 return; 2787 } 2788 sio_timeouts_until_log = hz / sio_timeout; 2789 for (unit = 0; unit < sio_numunits; ++unit) { 2790 int errnum; 2791 2792 com = com_addr(unit); 2793 if (com == NULL) 2794 continue; 2795 if (com->gone) 2796 continue; 2797 for (errnum = 0; errnum < CE_NTYPES; ++errnum) { 2798 u_int delta; 2799 u_long total; 2800 2801 com_lock(); 2802 delta = com->delta_error_counts[errnum]; 2803 com->delta_error_counts[errnum] = 0; 2804 com_unlock(); 2805 if (delta == 0) 2806 continue; 2807 total = com->error_counts[errnum] += delta; 2808 log(LOG_ERR, "sio%d: %u more %s%s (total %lu)\n", 2809 unit, delta, error_desc[errnum], 2810 delta == 1 ? "" : "s", total); 2811 } 2812 } 2813 lwkt_reltoken(&tty_token); 2814 } 2815 2816 static void 2817 disc_optim(struct tty *tp, struct termios *t, struct com_s *com) 2818 { 2819 lwkt_gettoken(&tty_token); 2820 if (!(t->c_iflag & (ICRNL | IGNCR | IMAXBEL | INLCR | ISTRIP | IXON)) 2821 && (!(t->c_iflag & BRKINT) || (t->c_iflag & IGNBRK)) 2822 && (!(t->c_iflag & PARMRK) 2823 || (t->c_iflag & (IGNPAR | IGNBRK)) == (IGNPAR | IGNBRK)) 2824 && !(t->c_lflag & (ECHO | ICANON | IEXTEN | ISIG | PENDIN)) 2825 && linesw[tp->t_line].l_rint == ttyinput) 2826 tp->t_state |= TS_CAN_BYPASS_L_RINT; 2827 else 2828 tp->t_state &= ~TS_CAN_BYPASS_L_RINT; 2829 com->hotchar = linesw[tp->t_line].l_hotchar; 2830 lwkt_reltoken(&tty_token); 2831 } 2832 2833 /* 2834 * Following are all routines needed for SIO to act as console 2835 */ 2836 #include <sys/cons.h> 2837 2838 struct siocnstate { 2839 u_char dlbl; 2840 u_char dlbh; 2841 u_char ier; 2842 u_char cfcr; 2843 u_char mcr; 2844 }; 2845 2846 static speed_t siocngetspeed (Port_t, u_long rclk); 2847 static void siocnclose (struct siocnstate *sp, Port_t iobase); 2848 static void siocnopen (struct siocnstate *sp, Port_t iobase, int speed); 2849 static void siocntxwait (Port_t iobase); 2850 2851 static cn_probe_t siocnprobe; 2852 static cn_init_t siocninit; 2853 static cn_init_fini_t siocninit_fini; 2854 static cn_checkc_t siocncheckc; 2855 static cn_getc_t siocngetc; 2856 static cn_putc_t siocnputc; 2857 2858 #if defined(__i386__) || defined(__x86_64__) 2859 CONS_DRIVER(sio, siocnprobe, siocninit, siocninit_fini, 2860 NULL, siocngetc, siocncheckc, siocnputc, NULL); 2861 #endif 2862 2863 /* To get the GDB related variables */ 2864 #if DDB > 0 2865 #include <ddb/ddb.h> 2866 #endif 2867 2868 static void 2869 siocntxwait(Port_t iobase) 2870 { 2871 int timo; 2872 2873 /* 2874 * Wait for any pending transmission to finish. Required to avoid 2875 * the UART lockup bug when the speed is changed, and for normal 2876 * transmits. 2877 */ 2878 timo = 100000; 2879 while ((inb(iobase + com_lsr) & (LSR_TSRE | LSR_TXRDY)) 2880 != (LSR_TSRE | LSR_TXRDY) && --timo != 0) 2881 ; 2882 } 2883 2884 /* 2885 * Read the serial port specified and try to figure out what speed 2886 * it's currently running at. We're assuming the serial port has 2887 * been initialized and is basicly idle. This routine is only intended 2888 * to be run at system startup. 2889 * 2890 * If the value read from the serial port doesn't make sense, return 0. 2891 */ 2892 /* 2893 * NOTE: Must be called with tty_token held 2894 */ 2895 static speed_t 2896 siocngetspeed(Port_t iobase, u_long rclk) 2897 { 2898 u_int divisor; 2899 u_char dlbh; 2900 u_char dlbl; 2901 u_char cfcr; 2902 2903 cfcr = inb(iobase + com_cfcr); 2904 outb(iobase + com_cfcr, CFCR_DLAB | cfcr); 2905 2906 dlbl = inb(iobase + com_dlbl); 2907 dlbh = inb(iobase + com_dlbh); 2908 2909 outb(iobase + com_cfcr, cfcr); 2910 2911 divisor = dlbh << 8 | dlbl; 2912 2913 /* XXX there should be more sanity checking. */ 2914 if (divisor == 0) 2915 return (CONSPEED); 2916 return (rclk / (16UL * divisor)); 2917 } 2918 2919 static void 2920 siocnopen(struct siocnstate *sp, Port_t iobase, int speed) 2921 { 2922 u_int divisor; 2923 u_char dlbh; 2924 u_char dlbl; 2925 2926 /* 2927 * Save all the device control registers except the fifo register 2928 * and set our default ones (cs8 -parenb speed=comdefaultrate). 2929 * We can't save the fifo register since it is read-only. 2930 */ 2931 sp->ier = inb(iobase + com_ier); 2932 outb(iobase + com_ier, 0); /* spltty() doesn't stop siointr() */ 2933 siocntxwait(iobase); 2934 sp->cfcr = inb(iobase + com_cfcr); 2935 outb(iobase + com_cfcr, CFCR_DLAB | CFCR_8BITS); 2936 sp->dlbl = inb(iobase + com_dlbl); 2937 sp->dlbh = inb(iobase + com_dlbh); 2938 /* 2939 * Only set the divisor registers if they would change, since on 2940 * some 16550 incompatibles (Startech), setting them clears the 2941 * data input register. This also reduces the effects of the 2942 * UMC8669F bug. 2943 */ 2944 divisor = siodivisor(comdefaultrclk, speed); 2945 dlbl = divisor & 0xFF; 2946 if (sp->dlbl != dlbl) 2947 outb(iobase + com_dlbl, dlbl); 2948 dlbh = divisor >> 8; 2949 if (sp->dlbh != dlbh) 2950 outb(iobase + com_dlbh, dlbh); 2951 outb(iobase + com_cfcr, CFCR_8BITS); 2952 sp->mcr = inb(iobase + com_mcr); 2953 /* 2954 * We don't want interrupts, but must be careful not to "disable" 2955 * them by clearing the MCR_IENABLE bit, since that might cause 2956 * an interrupt by floating the IRQ line. 2957 */ 2958 outb(iobase + com_mcr, (sp->mcr & MCR_IENABLE) | MCR_DTR | MCR_RTS); 2959 } 2960 2961 static void 2962 siocnclose(struct siocnstate *sp, Port_t iobase) 2963 { 2964 /* 2965 * Restore the device control registers. 2966 */ 2967 siocntxwait(iobase); 2968 outb(iobase + com_cfcr, CFCR_DLAB | CFCR_8BITS); 2969 if (sp->dlbl != inb(iobase + com_dlbl)) 2970 outb(iobase + com_dlbl, sp->dlbl); 2971 if (sp->dlbh != inb(iobase + com_dlbh)) 2972 outb(iobase + com_dlbh, sp->dlbh); 2973 outb(iobase + com_cfcr, sp->cfcr); 2974 /* 2975 * XXX damp oscillations of MCR_DTR and MCR_RTS by not restoring them. 2976 */ 2977 outb(iobase + com_mcr, sp->mcr | MCR_DTR | MCR_RTS); 2978 outb(iobase + com_ier, sp->ier); 2979 } 2980 2981 static void 2982 siocnprobe(struct consdev *cp) 2983 { 2984 speed_t boot_speed; 2985 u_char cfcr; 2986 u_int divisor; 2987 int unit; 2988 struct siocnstate sp; 2989 2990 /* 2991 * Find our first enabled console, if any. If it is a high-level 2992 * console device, then initialize it and return successfully. 2993 * If it is a low-level console device, then initialize it and 2994 * return unsuccessfully. It must be initialized in both cases 2995 * for early use by console drivers and debuggers. Initializing 2996 * the hardware is not necessary in all cases, since the i/o 2997 * routines initialize it on the fly, but it is necessary if 2998 * input might arrive while the hardware is switched back to an 2999 * uninitialized state. We can't handle multiple console devices 3000 * yet because our low-level routines don't take a device arg. 3001 * We trust the user to set the console flags properly so that we 3002 * don't need to probe. 3003 */ 3004 cp->cn_pri = CN_DEAD; 3005 3006 for (unit = 0; unit < 16; unit++) { /* XXX need to know how many */ 3007 int flags; 3008 int disabled; 3009 if (resource_int_value("sio", unit, "disabled", &disabled) == 0) { 3010 if (disabled) 3011 continue; 3012 } 3013 if (resource_int_value("sio", unit, "flags", &flags)) 3014 continue; 3015 if (COM_CONSOLE(flags) || COM_DEBUGGER(flags)) { 3016 int port; 3017 Port_t iobase; 3018 3019 if (resource_int_value("sio", unit, "port", &port)) 3020 continue; 3021 iobase = port; 3022 crit_enter(); 3023 if (boothowto & RB_SERIAL) { 3024 boot_speed = 3025 siocngetspeed(iobase, comdefaultrclk); 3026 if (boot_speed) 3027 comdefaultrate = boot_speed; 3028 } 3029 3030 /* 3031 * Initialize the divisor latch. We can't rely on 3032 * siocnopen() to do this the first time, since it 3033 * avoids writing to the latch if the latch appears 3034 * to have the correct value. Also, if we didn't 3035 * just read the speed from the hardware, then we 3036 * need to set the speed in hardware so that 3037 * switching it later is null. 3038 */ 3039 com_lock(); 3040 cfcr = inb(iobase + com_cfcr); 3041 outb(iobase + com_cfcr, CFCR_DLAB | cfcr); 3042 divisor = siodivisor(comdefaultrclk, comdefaultrate); 3043 outb(iobase + com_dlbl, divisor & 0xff); 3044 outb(iobase + com_dlbh, divisor >> 8); 3045 outb(iobase + com_cfcr, cfcr); 3046 3047 siocnopen(&sp, iobase, comdefaultrate); 3048 com_unlock(); 3049 3050 crit_exit(); 3051 if (COM_CONSOLE(flags) && !COM_LLCONSOLE(flags)) { 3052 cp->cn_probegood = 1; 3053 cp->cn_private = (void *)(intptr_t)unit; 3054 cp->cn_pri = COM_FORCECONSOLE(flags) 3055 || boothowto & RB_SERIAL 3056 ? CN_REMOTE : CN_NORMAL; 3057 siocniobase = iobase; 3058 siocnunit = unit; 3059 } 3060 if (COM_DEBUGGER(flags) && gdb_tab == NULL) { 3061 kprintf("sio%d: gdb debugging port\n", unit); 3062 siogdbiobase = iobase; 3063 siogdbunit = unit; 3064 #if DDB > 0 3065 cp->cn_gdbprivate = (void *)(intptr_t)unit; 3066 gdb_tab = cp; 3067 #endif 3068 } 3069 } 3070 } 3071 #if defined(__i386__) || defined(__x86_64__) 3072 #if DDB > 0 3073 /* 3074 * XXX Ugly Compatability. 3075 * If no gdb port has been specified, set it to be the console 3076 * as some configuration files don't specify the gdb port. 3077 */ 3078 if (gdb_tab == NULL && (boothowto & RB_GDB)) { 3079 kprintf("Warning: no GDB port specified. Defaulting to sio%d.\n", 3080 siocnunit); 3081 kprintf("Set flag 0x80 on desired GDB port in your\n"); 3082 kprintf("configuration file (currently sio only).\n"); 3083 siogdbiobase = siocniobase; 3084 siogdbunit = siocnunit; 3085 cp->cn_gdbprivate = (void *)(intptr_t)siocnunit; 3086 gdb_tab = cp; 3087 } 3088 #endif 3089 #endif 3090 } 3091 3092 static void 3093 siocninit(struct consdev *cp) 3094 { 3095 comconsole = (int)(intptr_t)cp->cn_private; 3096 } 3097 3098 static void 3099 siocninit_fini(struct consdev *cp) 3100 { 3101 cdev_t dev; 3102 int unit; 3103 3104 if (cp->cn_probegood) { 3105 unit = (int)(intptr_t)cp->cn_private; 3106 /* 3107 * Call devfs_find_device_by_name on ttydX to find the correct device, 3108 * as it should have been created already at this point by the 3109 * attach routine. 3110 * If it isn't found, the serial port was not attached at all and we 3111 * shouldn't be here, so assert this case. 3112 */ 3113 dev = devfs_find_device_by_name("ttyd%r", unit); 3114 3115 KKASSERT(dev != NULL); 3116 cp->cn_dev = dev; 3117 } 3118 } 3119 3120 static int 3121 siocncheckc(void *private) 3122 { 3123 int c; 3124 int unit = (int)(intptr_t)private; 3125 Port_t iobase; 3126 struct siocnstate sp; 3127 3128 if (unit == siogdbunit) 3129 iobase = siogdbiobase; 3130 else 3131 iobase = siocniobase; 3132 com_lock(); 3133 crit_enter(); 3134 siocnopen(&sp, iobase, comdefaultrate); 3135 if (inb(iobase + com_lsr) & LSR_RXRDY) 3136 c = inb(iobase + com_data); 3137 else 3138 c = -1; 3139 siocnclose(&sp, iobase); 3140 crit_exit(); 3141 com_unlock(); 3142 return (c); 3143 } 3144 3145 3146 int 3147 siocngetc(void *private) 3148 { 3149 int c; 3150 int unit = (int)(intptr_t)private; 3151 Port_t iobase; 3152 struct siocnstate sp; 3153 3154 if (unit == siogdbunit) 3155 iobase = siogdbiobase; 3156 else 3157 iobase = siocniobase; 3158 com_lock(); 3159 crit_enter(); 3160 siocnopen(&sp, iobase, comdefaultrate); 3161 while (!(inb(iobase + com_lsr) & LSR_RXRDY)) 3162 ; 3163 c = inb(iobase + com_data); 3164 siocnclose(&sp, iobase); 3165 crit_exit(); 3166 com_unlock(); 3167 return (c); 3168 } 3169 3170 void 3171 siocnputc(void *private, int c) 3172 { 3173 int unit = (int)(intptr_t)private; 3174 struct siocnstate sp; 3175 Port_t iobase; 3176 3177 if (unit == siogdbunit) 3178 iobase = siogdbiobase; 3179 else 3180 iobase = siocniobase; 3181 com_lock(); 3182 crit_enter(); 3183 siocnopen(&sp, iobase, comdefaultrate); 3184 siocntxwait(iobase); 3185 outb(iobase + com_data, c); 3186 siocnclose(&sp, iobase); 3187 crit_exit(); 3188 com_unlock(); 3189 } 3190 3191 DRIVER_MODULE(sio, isa, sio_isa_driver, sio_devclass, 0, 0); 3192 DRIVER_MODULE(sio, acpi, sio_isa_driver, sio_devclass, 0, 0); 3193 #if NPCI > 0 3194 DRIVER_MODULE(sio, pci, sio_pci_driver, sio_devclass, 0, 0); 3195 #endif 3196 #if NPUC > 0 3197 DRIVER_MODULE(sio, puc, sio_puc_driver, sio_devclass, 0, 0); 3198 #endif 3199