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 #include "use_puc.h" 46 47 /* 48 * Serial driver, based on 386BSD-0.1 com driver. 49 * Mostly rewritten to use pseudo-DMA. 50 * Works for National Semiconductor NS8250-NS16550AF UARTs. 51 * COM driver, based on HP dca driver. 52 * 53 * Changes for PC-Card integration: 54 * - Added PC-Card driver table and handlers 55 */ 56 #include <sys/param.h> 57 #include <sys/systm.h> 58 #include <sys/reboot.h> 59 #include <sys/malloc.h> 60 #include <sys/tty.h> 61 #include <sys/proc.h> 62 #include <sys/priv.h> 63 #include <sys/module.h> 64 #include <sys/conf.h> 65 #include <sys/dkstat.h> 66 #include <sys/fcntl.h> 67 #include <sys/interrupt.h> 68 #include <sys/kernel.h> 69 #include <sys/syslog.h> 70 #include <sys/sysctl.h> 71 #include <sys/bus.h> 72 #include <sys/rman.h> 73 #include <sys/timepps.h> 74 #include <sys/thread2.h> 75 #include <sys/devfs.h> 76 #include <sys/consio.h> 77 78 #include <machine/limits.h> 79 80 #include <bus/isa/isareg.h> 81 #include <bus/isa/isavar.h> 82 #if NPCI > 0 83 #include <bus/pci/pcireg.h> 84 #include <bus/pci/pcivar.h> 85 #endif 86 #if NPUC > 0 87 #include <dev/misc/puc/pucvar.h> 88 #endif 89 #include <machine/lock.h> 90 91 #include <machine/clock.h> 92 93 #include "sioreg.h" 94 #include "sio_private.h" 95 96 #ifdef COM_ESP 97 #include "../ic_layer/esp.h" 98 #endif 99 100 #define LOTS_OF_EVENTS 64 /* helps separate urgent events from input */ 101 102 #define CALLOUT_MASK 0x80 103 #define CONTROL_MASK 0x60 104 #define CONTROL_INIT_STATE 0x20 105 #define CONTROL_LOCK_STATE 0x40 106 #define DEV_TO_UNIT(dev) (MINOR_TO_UNIT(minor(dev))) 107 #define MINOR_TO_UNIT(mynor) ((((mynor) & ~0xffffU) >> (8 + 3)) \ 108 | ((mynor) & 0x1f)) 109 #define UNIT_TO_MINOR(unit) ((((unit) & ~0x1fU) << (8 + 3)) \ 110 | ((unit) & 0x1f)) 111 112 #define com_scr 7 /* scratch register for 16450-16550 (R/W) */ 113 114 #define sio_getreg(com, off) \ 115 (bus_space_read_1((com)->bst, (com)->bsh, (off))) 116 #define sio_setreg(com, off, value) \ 117 (bus_space_write_1((com)->bst, (com)->bsh, (off), (value))) 118 119 /* 120 * com state bits. 121 * (CS_BUSY | CS_TTGO) and (CS_BUSY | CS_TTGO | CS_ODEVREADY) must be higher 122 * than the other bits so that they can be tested as a group without masking 123 * off the low bits. 124 * 125 * The following com and tty flags correspond closely: 126 * CS_BUSY = TS_BUSY (maintained by comstart(), siopoll() and 127 * comstop()) 128 * CS_TTGO = ~TS_TTSTOP (maintained by comparam() and comstart()) 129 * CS_CTS_OFLOW = CCTS_OFLOW (maintained by comparam()) 130 * CS_RTS_IFLOW = CRTS_IFLOW (maintained by comparam()) 131 * TS_FLUSH is not used. 132 * XXX I think TIOCSETA doesn't clear TS_TTSTOP when it clears IXON. 133 * XXX CS_*FLOW should be CF_*FLOW in com->flags (control flags not state). 134 */ 135 #define CS_BUSY 0x80 /* output in progress */ 136 #define CS_TTGO 0x40 /* output not stopped by XOFF */ 137 #define CS_ODEVREADY 0x20 /* external device h/w ready (CTS) */ 138 #define CS_CHECKMSR 1 /* check of MSR scheduled */ 139 #define CS_CTS_OFLOW 2 /* use CTS output flow control */ 140 #define CS_DTR_OFF 0x10 /* DTR held off */ 141 #define CS_ODONE 4 /* output completed */ 142 #define CS_RTS_IFLOW 8 /* use RTS input flow control */ 143 #define CSE_BUSYCHECK 1 /* siobusycheck() scheduled */ 144 145 static char const * const error_desc[] = { 146 #define CE_OVERRUN 0 147 "silo overflow", 148 #define CE_INTERRUPT_BUF_OVERFLOW 1 149 "interrupt-level buffer overflow", 150 #define CE_TTY_BUF_OVERFLOW 2 151 "tty-level buffer overflow", 152 }; 153 154 #ifdef COM_ESP 155 static int espattach (struct com_s *com, Port_t esp_port); 156 #endif 157 static int sio_isa_attach (device_t dev); 158 159 static timeout_t siobusycheck; 160 static u_int siodivisor (u_long rclk, speed_t speed); 161 static timeout_t siodtrwakeup; 162 static void comhardclose (struct com_s *com); 163 static void sioinput (struct com_s *com); 164 static void siointr1 (struct com_s *com); 165 static void siointr (void *arg); 166 static int commctl (struct com_s *com, int bits, int how); 167 static int comparam (struct tty *tp, struct termios *t); 168 static inthand2_t siopoll; 169 static int sio_isa_probe (device_t dev); 170 static void siosettimeout (void); 171 static int siosetwater (struct com_s *com, speed_t speed); 172 static void comstart (struct tty *tp); 173 static void comstop (struct tty *tp, int rw); 174 static timeout_t comwakeup; 175 static void disc_optim (struct tty *tp, struct termios *t, 176 struct com_s *com); 177 178 #if NPCI > 0 179 static int sio_pci_attach (device_t dev); 180 static void sio_pci_kludge_unit (device_t dev); 181 static int sio_pci_probe (device_t dev); 182 #endif /* NPCI > 0 */ 183 184 #if NPUC > 0 185 static int sio_puc_attach (device_t dev); 186 static int sio_puc_probe (device_t dev); 187 #endif /* NPUC > 0 */ 188 189 static char driver_name[] = "sio"; 190 191 /* table and macro for fast conversion from a unit number to its com struct */ 192 devclass_t sio_devclass; 193 #define com_addr(unit) ((struct com_s *) \ 194 devclass_get_softc(sio_devclass, unit)) 195 196 static device_method_t sio_isa_methods[] = { 197 /* Device interface */ 198 DEVMETHOD(device_probe, sio_isa_probe), 199 DEVMETHOD(device_attach, sio_isa_attach), 200 201 DEVMETHOD_END 202 }; 203 204 static driver_t sio_isa_driver = { 205 driver_name, 206 sio_isa_methods, 207 sizeof(struct com_s), 208 }; 209 210 #if NPCI > 0 211 static device_method_t sio_pci_methods[] = { 212 /* Device interface */ 213 DEVMETHOD(device_probe, sio_pci_probe), 214 DEVMETHOD(device_attach, sio_pci_attach), 215 216 DEVMETHOD_END 217 }; 218 219 static driver_t sio_pci_driver = { 220 driver_name, 221 sio_pci_methods, 222 sizeof(struct com_s), 223 }; 224 #endif /* NPCI > 0 */ 225 226 #if NPUC > 0 227 static device_method_t sio_puc_methods[] = { 228 /* Device interface */ 229 DEVMETHOD(device_probe, sio_puc_probe), 230 DEVMETHOD(device_attach, sio_puc_attach), 231 232 DEVMETHOD_END 233 }; 234 235 static driver_t sio_puc_driver = { 236 driver_name, 237 sio_puc_methods, 238 sizeof(struct com_s), 239 }; 240 #endif /* NPUC > 0 */ 241 242 static d_open_t sioopen; 243 static d_close_t sioclose; 244 static d_read_t sioread; 245 static d_write_t siowrite; 246 static d_ioctl_t sioioctl; 247 248 static struct dev_ops sio_ops = { 249 { driver_name, 0, D_TTY }, 250 .d_open = sioopen, 251 .d_close = sioclose, 252 .d_read = sioread, 253 .d_write = siowrite, 254 .d_ioctl = sioioctl, 255 .d_kqfilter = ttykqfilter, 256 .d_revoke = ttyrevoke 257 }; 258 259 int comconsole = -1; 260 static volatile speed_t comdefaultrate = CONSPEED; 261 static u_long comdefaultrclk = DEFAULT_RCLK; 262 SYSCTL_ULONG(_machdep, OID_AUTO, conrclk, CTLFLAG_RW, &comdefaultrclk, 0, ""); 263 static u_int com_events; /* input chars + weighted output completions */ 264 static Port_t siocniobase; 265 static int siocnunit; 266 static Port_t siogdbiobase; 267 static int siogdbunit = -1; 268 static bool_t sio_registered; 269 static int sio_timeout; 270 static int sio_timeouts_until_log; 271 static struct callout sio_timeout_handle; 272 static int sio_numunits; 273 274 #ifdef COM_ESP 275 /* XXX configure this properly. */ 276 static Port_t likely_com_ports[] = { 0x3f8, 0x2f8, 0x3e8, 0x2e8, }; 277 static Port_t likely_esp_ports[] = { 0x140, 0x180, 0x280, 0 }; 278 #endif 279 280 /* 281 * handle sysctl read/write requests for console speed 282 * 283 * In addition to setting comdefaultrate for I/O through /dev/console, 284 * also set the initial and lock values for the /dev/ttyXX device 285 * if there is one associated with the console. Finally, if the /dev/tty 286 * device has already been open, change the speed on the open running port 287 * itself. 288 */ 289 290 static int 291 sysctl_machdep_comdefaultrate(SYSCTL_HANDLER_ARGS) 292 { 293 int error; 294 speed_t newspeed; 295 struct com_s *com; 296 struct tty *tp; 297 298 lwkt_gettoken(&tty_token); 299 newspeed = comdefaultrate; 300 301 error = sysctl_handle_opaque(oidp, &newspeed, sizeof newspeed, req); 302 if (error || !req->newptr) { 303 lwkt_reltoken(&tty_token); 304 return (error); 305 } 306 307 comdefaultrate = newspeed; 308 309 if (comconsole < 0) { /* serial console not selected? */ 310 lwkt_reltoken(&tty_token); 311 return (0); 312 } 313 314 com = com_addr(comconsole); 315 if (com == NULL) { 316 lwkt_reltoken(&tty_token); 317 return (ENXIO); 318 } 319 320 /* 321 * set the initial and lock rates for /dev/ttydXX and /dev/cuaXX 322 * (note, the lock rates really are boolean -- if non-zero, disallow 323 * speed changes) 324 */ 325 com->it_in.c_ispeed = com->it_in.c_ospeed = 326 com->lt_in.c_ispeed = com->lt_in.c_ospeed = 327 com->it_out.c_ispeed = com->it_out.c_ospeed = 328 com->lt_out.c_ispeed = com->lt_out.c_ospeed = comdefaultrate; 329 330 /* 331 * if we're open, change the running rate too 332 */ 333 tp = com->tp; 334 if (tp && (tp->t_state & TS_ISOPEN)) { 335 tp->t_termios.c_ispeed = 336 tp->t_termios.c_ospeed = comdefaultrate; 337 crit_enter(); 338 error = comparam(tp, &tp->t_termios); 339 crit_exit(); 340 } 341 lwkt_reltoken(&tty_token); 342 return error; 343 } 344 345 SYSCTL_PROC(_machdep, OID_AUTO, conspeed, CTLTYPE_INT | CTLFLAG_RW, 346 0, 0, sysctl_machdep_comdefaultrate, "I", ""); 347 348 #if NPCI > 0 349 struct pci_ids { 350 u_int32_t type; 351 const char *desc; 352 int rid; 353 }; 354 355 static struct pci_ids pci_ids[] = { 356 { 0x100812b9, "3COM PCI FaxModem", 0x10 }, 357 { 0x2000131f, "CyberSerial (1-port) 16550", 0x10 }, 358 { 0x01101407, "Koutech IOFLEX-2S PCI Dual Port Serial", 0x10 }, 359 { 0x01111407, "Koutech IOFLEX-2S PCI Dual Port Serial", 0x10 }, 360 { 0x048011c1, "Lucent kermit based PCI Modem", 0x14 }, 361 { 0x95211415, "Oxford Semiconductor PCI Dual Port Serial", 0x10 }, 362 { 0x7101135e, "SeaLevel Ultra 530.PCI Single Port Serial", 0x18 }, 363 { 0x0000151f, "SmartLink 5634PCV SurfRider", 0x10 }, 364 { 0x98459710, "Netmos Nm9845 PCI Bridge with Dual UART", 0x10 }, 365 { 0x00000000, NULL, 0 } 366 }; 367 368 static int 369 sio_pci_attach(device_t dev) 370 { 371 u_int32_t type; 372 struct pci_ids *id; 373 374 type = pci_get_devid(dev); 375 id = pci_ids; 376 while (id->type && id->type != type) 377 id++; 378 if (id->desc == NULL) 379 return (ENXIO); 380 sio_pci_kludge_unit(dev); 381 return (sioattach(dev, id->rid, 0UL)); 382 } 383 384 /* 385 * Don't cut and paste this to other drivers. It is a horrible kludge 386 * which will fail to work and also be unnecessary in future versions. 387 */ 388 static void 389 sio_pci_kludge_unit(device_t dev) 390 { 391 devclass_t dc; 392 int err; 393 int start; 394 int unit; 395 396 unit = 0; 397 start = 0; 398 while (resource_int_value("sio", unit, "port", &start) == 0 && 399 start > 0) 400 unit++; 401 if (device_get_unit(dev) < unit) { 402 dc = device_get_devclass(dev); 403 while (devclass_get_device(dc, unit)) 404 unit++; 405 device_printf(dev, "moving to sio%d\n", unit); 406 err = device_set_unit(dev, unit); /* EVIL DO NOT COPY */ 407 if (err) 408 device_printf(dev, "error moving device %d\n", err); 409 } 410 } 411 412 static int 413 sio_pci_probe(device_t dev) 414 { 415 u_int32_t type; 416 struct pci_ids *id; 417 418 type = pci_get_devid(dev); 419 id = pci_ids; 420 while (id->type && id->type != type) 421 id++; 422 if (id->desc == NULL) 423 return (ENXIO); 424 device_set_desc(dev, id->desc); 425 return (sioprobe(dev, id->rid, 0UL)); 426 } 427 #endif /* NPCI > 0 */ 428 429 #if NPUC > 0 430 static int 431 sio_puc_attach(device_t dev) 432 { 433 uintptr_t rclk; 434 435 if (BUS_READ_IVAR(device_get_parent(dev), dev, PUC_IVAR_FREQ, 436 &rclk) != 0) 437 rclk = DEFAULT_RCLK; 438 return (sioattach(dev, 0, rclk)); 439 } 440 441 static int 442 sio_puc_probe(device_t dev) 443 { 444 uintptr_t rclk; 445 446 if (BUS_READ_IVAR(device_get_parent(dev), dev, PUC_IVAR_FREQ, 447 &rclk) != 0) 448 rclk = DEFAULT_RCLK; 449 return (sioprobe(dev, 0, rclk)); 450 } 451 #endif /* NPUC */ 452 453 static struct isa_pnp_id sio_ids[] = { 454 {0x0005d041, "Standard PC COM port"}, /* PNP0500 */ 455 {0x0105d041, "16550A-compatible COM port"}, /* PNP0501 */ 456 {0x0205d041, "Multiport serial device (non-intelligent 16550)"}, /* PNP0502 */ 457 {0x1005d041, "Generic IRDA-compatible device"}, /* PNP0510 */ 458 {0x1105d041, "Generic IRDA-compatible device"}, /* PNP0511 */ 459 /* Devices that do not have a compatid */ 460 {0x12206804, NULL}, /* ACH2012 - 5634BTS 56K Video Ready Modem */ 461 {0x7602a904, NULL}, /* AEI0276 - 56K v.90 Fax Modem (LKT) */ 462 {0x00007905, NULL}, /* AKY0000 - 56K Plug&Play Modem */ 463 {0x21107905, NULL}, /* AKY1021 - 56K Plug&Play Modem */ 464 {0x01405407, NULL}, /* AZT4001 - AZT3000 PnP SOUND DEVICE, MODEM */ 465 {0x56039008, NULL}, /* BDP0356 - Best Data 56x2 */ 466 {0x56159008, NULL}, /* BDP1556 - B.D. Smart One 56SPS,Voice Modem*/ 467 {0x36339008, NULL}, /* BDP3336 - Best Data Prods. 336F */ 468 {0x0014490a, NULL}, /* BRI1400 - Boca 33.6 PnP */ 469 {0x0015490a, NULL}, /* BRI1500 - Internal Fax Data */ 470 {0x0034490a, NULL}, /* BRI3400 - Internal ACF Modem */ 471 {0x0094490a, NULL}, /* BRI9400 - Boca K56Flex PnP */ 472 {0x00b4490a, NULL}, /* BRIB400 - Boca 56k PnP */ 473 {0x0030320d, NULL}, /* CIR3000 - Cirrus Logic V43 */ 474 {0x0100440e, NULL}, /* CRD0001 - Cardinal MVP288IV ? */ 475 {0x01308c0e, NULL}, /* CTL3001 - Creative Labs Phoneblaster */ 476 {0x36033610, NULL}, /* DAV0336 - DAVICOM 336PNP MODEM */ 477 {0x01009416, NULL}, /* ETT0001 - E-Tech Bullet 33k6 PnP */ 478 {0x0000aa1a, NULL}, /* FUJ0000 - FUJITSU Modem 33600 PNP/I2 */ 479 {0x1200c31e, NULL}, /* GVC0012 - VF1128HV-R9 (win modem?) */ 480 {0x0303c31e, NULL}, /* GVC0303 - MaxTech 33.6 PnP D/F/V */ 481 {0x0505c31e, NULL}, /* GVC0505 - GVC 56k Faxmodem */ 482 {0x0116c31e, NULL}, /* GVC1601 - Rockwell V.34 Plug & Play Modem */ 483 {0x0050c31e, NULL}, /* GVC5000 - some GVC modem */ 484 {0x3800f91e, NULL}, /* GWY0038 - Telepath with v.90 */ 485 {0x9062f91e, NULL}, /* GWY6290 - Telepath with x2 Technology */ 486 {0x8100e425, NULL}, /* IOD0081 - I-O DATA DEVICE,INC. IFML-560 */ 487 {0x21002534, NULL}, /* MAE0021 - Jetstream Int V.90 56k Voice Series 2*/ 488 {0x0000f435, NULL}, /* MOT0000 - Motorola ModemSURFR 33.6 Intern */ 489 {0x5015f435, NULL}, /* MOT1550 - Motorola ModemSURFR 56K Modem */ 490 {0xf015f435, NULL}, /* MOT15F0 - Motorola VoiceSURFR 56K Modem */ 491 {0x6045f435, NULL}, /* MOT4560 - Motorola ? */ 492 {0x61e7a338, NULL}, /* NECE761 - 33.6Modem */ 493 {0x08804f3f, NULL}, /* OZO8008 - Zoom (33.6k Modem) */ 494 {0x0f804f3f, NULL}, /* OZO800f - Zoom 2812 (56k Modem) */ 495 {0x39804f3f, NULL}, /* OZO8039 - Zoom 56k flex */ 496 {0x00914f3f, NULL}, /* OZO9100 - Zoom 2919 (K56 Faxmodem) */ 497 {0x3024a341, NULL}, /* PMC2430 - Pace 56 Voice Internal Modem */ 498 {0x1000eb49, NULL}, /* ROK0010 - Rockwell ? */ 499 {0x1200b23d, NULL}, /* RSS0012 - OMRON ME5614ISA */ 500 {0x5002734a, NULL}, /* RSS0250 - 5614Jx3(G) Internal Modem */ 501 {0x6202734a, NULL}, /* RSS0262 - 5614Jx3[G] V90+K56Flex Modem */ 502 {0x1010104d, NULL}, /* SHP1010 - Rockwell 33600bps Modem */ 503 {0xc100ad4d, NULL}, /* SMM00C1 - Leopard 56k PnP */ 504 {0x9012b04e, NULL}, /* SUP1290 - Supra ? */ 505 {0x1013b04e, NULL}, /* SUP1310 - SupraExpress 336i PnP */ 506 {0x8013b04e, NULL}, /* SUP1380 - SupraExpress 288i PnP Voice */ 507 {0x8113b04e, NULL}, /* SUP1381 - SupraExpress 336i PnP Voice */ 508 {0x5016b04e, NULL}, /* SUP1650 - Supra 336i Sp Intl */ 509 {0x7016b04e, NULL}, /* SUP1670 - Supra 336i V+ Intl */ 510 {0x7420b04e, NULL}, /* SUP2070 - Supra ? */ 511 {0x8020b04e, NULL}, /* SUP2080 - Supra ? */ 512 {0x8420b04e, NULL}, /* SUP2084 - SupraExpress 56i PnP */ 513 {0x7121b04e, NULL}, /* SUP2171 - SupraExpress 56i Sp? */ 514 {0x8024b04e, NULL}, /* SUP2480 - Supra ? */ 515 {0x01007256, NULL}, /* USR0001 - U.S. Robotics Inc., Sportster W */ 516 {0x02007256, NULL}, /* USR0002 - U.S. Robotics Inc. Sportster 33. */ 517 {0x04007256, NULL}, /* USR0004 - USR Sportster 14.4k */ 518 {0x06007256, NULL}, /* USR0006 - USR Sportster 33.6k */ 519 {0x11007256, NULL}, /* USR0011 - USR ? */ 520 {0x01017256, NULL}, /* USR0101 - USR ? */ 521 {0x30207256, NULL}, /* USR2030 - U.S.Robotics Inc. Sportster 560 */ 522 {0x50207256, NULL}, /* USR2050 - U.S.Robotics Inc. Sportster 33. */ 523 {0x70207256, NULL}, /* USR2070 - U.S.Robotics Inc. Sportster 560 */ 524 {0x30307256, NULL}, /* USR3030 - U.S. Robotics 56K FAX INT */ 525 {0x31307256, NULL}, /* USR3031 - U.S. Robotics 56K FAX INT */ 526 {0x50307256, NULL}, /* USR3050 - U.S. Robotics 56K FAX INT */ 527 {0x70307256, NULL}, /* USR3070 - U.S. Robotics 56K Voice INT */ 528 {0x90307256, NULL}, /* USR3090 - USR ? */ 529 {0x70917256, NULL}, /* USR9170 - U.S. Robotics 56K FAX INT */ 530 {0x90917256, NULL}, /* USR9190 - USR 56k Voice INT */ 531 {0x0300695c, NULL}, /* WCI0003 - Fax/Voice/Modem/Speakphone/Asvd */ 532 {0x01a0896a, NULL}, /* ZTIA001 - Zoom Internal V90 Faxmodem */ 533 {0x61f7896a, NULL}, /* ZTIF761 - Zoom ComStar 33.6 */ 534 {0} 535 }; 536 537 538 539 static int 540 sio_isa_probe(device_t dev) 541 { 542 /* Check isapnp ids */ 543 if (ISA_PNP_PROBE(device_get_parent(dev), dev, sio_ids) == ENXIO) 544 return (ENXIO); 545 return (sioprobe(dev, 0, 0UL)); 546 } 547 548 int 549 sioprobe(device_t dev, int xrid, u_long rclk) 550 { 551 #if 0 552 static bool_t already_init; 553 device_t xdev; 554 #endif 555 struct com_s *com; 556 u_int divisor; 557 bool_t failures[10]; 558 int fn; 559 device_t idev; 560 Port_t iobase; 561 intrmask_t irqmap[4]; 562 intrmask_t irqs; 563 u_char mcr_image; 564 int result; 565 u_long xirq; 566 u_int flags = device_get_flags(dev); 567 int rid; 568 struct resource *port; 569 570 rid = xrid; 571 port = bus_alloc_resource(dev, SYS_RES_IOPORT, &rid, 572 0, ~0, IO_COMSIZE, RF_ACTIVE); 573 if (!port) 574 return (ENXIO); 575 576 lwkt_gettoken(&tty_token); 577 com = device_get_softc(dev); 578 com->bst = rman_get_bustag(port); 579 com->bsh = rman_get_bushandle(port); 580 if (rclk == 0) 581 rclk = DEFAULT_RCLK; 582 com->rclk = rclk; 583 584 #if 0 585 /* 586 * XXX this is broken - when we are first called, there are no 587 * previously configured IO ports. We could hard code 588 * 0x3f8, 0x2f8, 0x3e8, 0x2e8 etc but that's probably worse. 589 * This code has been doing nothing since the conversion since 590 * "count" is zero the first time around. 591 */ 592 if (!already_init) { 593 /* 594 * Turn off MCR_IENABLE for all likely serial ports. An unused 595 * port with its MCR_IENABLE gate open will inhibit interrupts 596 * from any used port that shares the interrupt vector. 597 * XXX the gate enable is elsewhere for some multiports. 598 */ 599 device_t *devs; 600 int count, i, xioport; 601 602 devclass_get_devices(sio_devclass, &devs, &count); 603 for (i = 0; i < count; i++) { 604 xdev = devs[i]; 605 if (device_is_enabled(xdev) && 606 bus_get_resource(xdev, SYS_RES_IOPORT, 0, &xioport, 607 NULL) == 0) 608 outb(xioport + com_mcr, 0); 609 } 610 kfree(devs, M_TEMP); 611 already_init = TRUE; 612 } 613 #endif 614 615 if (COM_LLCONSOLE(flags)) { 616 kprintf("sio%d: reserved for low-level i/o\n", 617 device_get_unit(dev)); 618 bus_release_resource(dev, SYS_RES_IOPORT, rid, port); 619 lwkt_reltoken(&tty_token); 620 return (ENXIO); 621 } 622 623 /* 624 * If the device is on a multiport card and has an AST/4 625 * compatible interrupt control register, initialize this 626 * register and prepare to leave MCR_IENABLE clear in the mcr. 627 * Otherwise, prepare to set MCR_IENABLE in the mcr. 628 * Point idev to the device struct giving the correct id_irq. 629 * This is the struct for the master device if there is one. 630 */ 631 idev = dev; 632 mcr_image = MCR_IENABLE; 633 #ifdef COM_MULTIPORT 634 if (COM_ISMULTIPORT(flags)) { 635 Port_t xiobase; 636 u_long io; 637 638 idev = devclass_get_device(sio_devclass, COM_MPMASTER(flags)); 639 if (idev == NULL) { 640 kprintf("sio%d: master device %d not configured\n", 641 device_get_unit(dev), COM_MPMASTER(flags)); 642 idev = dev; 643 } 644 if (!COM_NOTAST4(flags)) { 645 if (bus_get_resource(idev, SYS_RES_IOPORT, 0, &io, 646 NULL) == 0) { 647 xiobase = io; 648 if (bus_get_resource(idev, SYS_RES_IRQ, 0, 649 NULL, NULL) == 0) 650 outb(xiobase + com_scr, 0x80); 651 else 652 outb(xiobase + com_scr, 0); 653 } 654 mcr_image = 0; 655 } 656 } 657 #endif /* COM_MULTIPORT */ 658 if (bus_get_resource(idev, SYS_RES_IRQ, 0, NULL, NULL) != 0) 659 mcr_image = 0; 660 661 bzero(failures, sizeof failures); 662 iobase = rman_get_start(port); 663 664 /* 665 * We don't want to get actual interrupts, just masked ones. 666 * Interrupts from this line should already be masked in the ICU, 667 * but mask them in the processor as well in case there are some 668 * (misconfigured) shared interrupts. 669 */ 670 com_lock(); 671 /* EXTRA DELAY? */ 672 673 /* 674 * For the TI16754 chips, set prescaler to 1 (4 is often the 675 * default after-reset value) as otherwise it's impossible to 676 * get highest baudrates. 677 */ 678 if (COM_TI16754(flags)) { 679 u_char cfcr, efr; 680 681 cfcr = sio_getreg(com, com_cfcr); 682 sio_setreg(com, com_cfcr, CFCR_EFR_ENABLE); 683 efr = sio_getreg(com, com_efr); 684 /* Unlock extended features to turn off prescaler. */ 685 sio_setreg(com, com_efr, efr | EFR_EFE); 686 /* Disable EFR. */ 687 sio_setreg(com, com_cfcr, (cfcr != CFCR_EFR_ENABLE) ? cfcr : 0); 688 /* Turn off prescaler. */ 689 sio_setreg(com, com_mcr, 690 sio_getreg(com, com_mcr) & ~MCR_PRESCALE); 691 sio_setreg(com, com_cfcr, CFCR_EFR_ENABLE); 692 sio_setreg(com, com_efr, efr); 693 sio_setreg(com, com_cfcr, cfcr); 694 } 695 696 /* 697 * Initialize the speed and the word size and wait long enough to 698 * drain the maximum of 16 bytes of junk in device output queues. 699 * The speed is undefined after a master reset and must be set 700 * before relying on anything related to output. There may be 701 * junk after a (very fast) soft reboot and (apparently) after 702 * master reset. 703 * XXX what about the UART bug avoided by waiting in comparam()? 704 * We don't want to to wait long enough to drain at 2 bps. 705 */ 706 if (iobase == siocniobase) { 707 DELAY((16 + 1) * 1000000 / (comdefaultrate / 10)); 708 } else { 709 sio_setreg(com, com_cfcr, CFCR_DLAB | CFCR_8BITS); 710 divisor = siodivisor(rclk, SIO_TEST_SPEED); 711 sio_setreg(com, com_dlbl, divisor & 0xff); 712 sio_setreg(com, com_dlbh, divisor >> 8); 713 sio_setreg(com, com_cfcr, CFCR_8BITS); 714 DELAY((16 + 1) * 1000000 / (SIO_TEST_SPEED / 10)); 715 } 716 717 /* 718 * Make sure we can drain the receiver. If we can't, the serial 719 * port may not exist. 720 */ 721 for (fn = 0; fn < 256; ++fn) { 722 if ((sio_getreg(com, com_lsr) & LSR_RXRDY) == 0) 723 break; 724 (void)sio_getreg(com, com_data); 725 } 726 if (fn == 256) { 727 com_unlock(); 728 lwkt_reltoken(&tty_token); 729 kprintf("sio%d: can't drain, serial port might " 730 "not exist, disabling\n", device_get_unit(dev)); 731 return (ENXIO); 732 } 733 734 /* 735 * Enable the interrupt gate and disable device interupts. This 736 * should leave the device driving the interrupt line low and 737 * guarantee an edge trigger if an interrupt can be generated. 738 */ 739 /* EXTRA DELAY? */ 740 sio_setreg(com, com_mcr, mcr_image); 741 sio_setreg(com, com_ier, 0); 742 DELAY(1000); /* XXX */ 743 irqmap[0] = isa_irq_pending(); 744 745 /* 746 * Attempt to set loopback mode so that we can send a null byte 747 * without annoying any external device. 748 */ 749 /* EXTRA DELAY? */ 750 sio_setreg(com, com_mcr, mcr_image | MCR_LOOPBACK); 751 752 /* 753 * Attempt to generate an output interrupt. On 8250's, setting 754 * IER_ETXRDY generates an interrupt independent of the current 755 * setting and independent of whether the THR is empty. On 16450's, 756 * setting IER_ETXRDY generates an interrupt independent of the 757 * current setting. On 16550A's, setting IER_ETXRDY only 758 * generates an interrupt when IER_ETXRDY is not already set. 759 */ 760 sio_setreg(com, com_ier, IER_ETXRDY); 761 762 /* 763 * On some 16x50 incompatibles, setting IER_ETXRDY doesn't generate 764 * an interrupt. They'd better generate one for actually doing 765 * output. Loopback may be broken on the same incompatibles but 766 * it's unlikely to do more than allow the null byte out. 767 */ 768 sio_setreg(com, com_data, 0); 769 DELAY((1 + 2) * 1000000 / (SIO_TEST_SPEED / 10)); 770 771 /* 772 * Turn off loopback mode so that the interrupt gate works again 773 * (MCR_IENABLE was hidden). This should leave the device driving 774 * an interrupt line high. It doesn't matter if the interrupt 775 * line oscillates while we are not looking at it, since interrupts 776 * are disabled. 777 */ 778 /* EXTRA DELAY? */ 779 sio_setreg(com, com_mcr, mcr_image); 780 781 /* 782 * Some pcmcia cards have the "TXRDY bug", so we check everyone 783 * for IIR_TXRDY implementation ( Palido 321s, DC-1S... ) 784 */ 785 if (COM_NOPROBE(flags)) { 786 /* Reading IIR register twice */ 787 for (fn = 0; fn < 2; fn ++) { 788 DELAY(10000); 789 failures[6] = sio_getreg(com, com_iir); 790 } 791 /* Check IIR_TXRDY clear ? */ 792 result = 0; 793 if (failures[6] & IIR_TXRDY) { 794 /* Nop, Double check with clearing IER */ 795 sio_setreg(com, com_ier, 0); 796 if (sio_getreg(com, com_iir) & IIR_NOPEND) { 797 /* Ok. we're familia this gang */ 798 SET_FLAG(dev, COM_C_IIR_TXRDYBUG); 799 } else { 800 /* Unknown, Just omit this chip.. XXX */ 801 result = ENXIO; 802 sio_setreg(com, com_mcr, 0); 803 } 804 } else { 805 /* OK. this is well-known guys */ 806 CLR_FLAG(dev, COM_C_IIR_TXRDYBUG); 807 } 808 sio_setreg(com, com_ier, 0); 809 sio_setreg(com, com_cfcr, CFCR_8BITS); 810 com_unlock(); 811 bus_release_resource(dev, SYS_RES_IOPORT, rid, port); 812 lwkt_reltoken(&tty_token); 813 return (iobase == siocniobase ? 0 : result); 814 } 815 816 /* 817 * Check that 818 * o the CFCR, IER and MCR in UART hold the values written to them 819 * (the values happen to be all distinct - this is good for 820 * avoiding false positive tests from bus echoes). 821 * o an output interrupt is generated and its vector is correct. 822 * o the interrupt goes away when the IIR in the UART is read. 823 */ 824 /* EXTRA DELAY? */ 825 failures[0] = sio_getreg(com, com_cfcr) - CFCR_8BITS; 826 failures[1] = sio_getreg(com, com_ier) - IER_ETXRDY; 827 failures[2] = sio_getreg(com, com_mcr) - mcr_image; 828 DELAY(10000); /* Some internal modems need this time */ 829 irqmap[1] = isa_irq_pending(); 830 failures[4] = (sio_getreg(com, com_iir) & IIR_IMASK) - IIR_TXRDY; 831 DELAY(1000); /* XXX */ 832 irqmap[2] = isa_irq_pending(); 833 failures[6] = (sio_getreg(com, com_iir) & IIR_IMASK) - IIR_NOPEND; 834 835 /* 836 * Turn off all device interrupts and check that they go off properly. 837 * Leave MCR_IENABLE alone. For ports without a master port, it gates 838 * the OUT2 output of the UART to 839 * the ICU input. Closing the gate would give a floating ICU input 840 * (unless there is another device driving it) and spurious interrupts. 841 * (On the system that this was first tested on, the input floats high 842 * and gives a (masked) interrupt as soon as the gate is closed.) 843 */ 844 sio_setreg(com, com_ier, 0); 845 sio_setreg(com, com_cfcr, CFCR_8BITS); /* dummy to avoid bus echo */ 846 failures[7] = sio_getreg(com, com_ier); 847 DELAY(1000); /* XXX */ 848 irqmap[3] = isa_irq_pending(); 849 failures[9] = (sio_getreg(com, com_iir) & IIR_IMASK) - IIR_NOPEND; 850 851 com_unlock(); 852 853 irqs = irqmap[1] & ~irqmap[0]; 854 if (bus_get_resource(idev, SYS_RES_IRQ, 0, &xirq, NULL) == 0 && 855 ((1 << xirq) & irqs) == 0) 856 kprintf( 857 "sio%d: configured irq %ld not in bitmap of probed irqs %#x\n", 858 device_get_unit(dev), xirq, irqs); 859 if (bootverbose) 860 kprintf("sio%d: irq maps: %#x %#x %#x %#x\n", 861 device_get_unit(dev), 862 irqmap[0], irqmap[1], irqmap[2], irqmap[3]); 863 864 result = 0; 865 for (fn = 0; fn < sizeof failures; ++fn) 866 if (failures[fn]) { 867 sio_setreg(com, com_mcr, 0); 868 result = ENXIO; 869 if (bootverbose) { 870 kprintf("sio%d: probe failed test(s):", 871 device_get_unit(dev)); 872 for (fn = 0; fn < sizeof failures; ++fn) 873 if (failures[fn]) 874 kprintf(" %d", fn); 875 kprintf("\n"); 876 } 877 break; 878 } 879 bus_release_resource(dev, SYS_RES_IOPORT, rid, port); 880 lwkt_reltoken(&tty_token); 881 return (iobase == siocniobase ? 0 : result); 882 } 883 884 #ifdef COM_ESP 885 static int 886 espattach(struct com_s *com, Port_t esp_port) 887 { 888 u_char dips; 889 u_char val; 890 891 /* 892 * Check the ESP-specific I/O port to see if we're an ESP 893 * card. If not, return failure immediately. 894 */ 895 if ((inb(esp_port) & 0xf3) == 0) { 896 kprintf(" port 0x%x is not an ESP board?\n", esp_port); 897 return (0); 898 } 899 900 lwkt_gettoken(&tty_token); 901 /* 902 * We've got something that claims to be a Hayes ESP card. 903 * Let's hope so. 904 */ 905 906 /* Get the dip-switch configuration */ 907 outb(esp_port + ESP_CMD1, ESP_GETDIPS); 908 dips = inb(esp_port + ESP_STATUS1); 909 910 /* 911 * Bits 0,1 of dips say which COM port we are. 912 */ 913 if (rman_get_start(com->ioportres) == likely_com_ports[dips & 0x03]) 914 kprintf(" : ESP"); 915 else { 916 kprintf(" esp_port has com %d\n", dips & 0x03); 917 lwkt_reltoken(&tty_token); 918 return (0); 919 } 920 921 /* 922 * Check for ESP version 2.0 or later: bits 4,5,6 = 010. 923 */ 924 outb(esp_port + ESP_CMD1, ESP_GETTEST); 925 val = inb(esp_port + ESP_STATUS1); /* clear reg 1 */ 926 val = inb(esp_port + ESP_STATUS2); 927 if ((val & 0x70) < 0x20) { 928 kprintf("-old (%o)", val & 0x70); 929 lwkt_reltoken(&tty_token); 930 return (0); 931 } 932 933 /* 934 * Check for ability to emulate 16550: bit 7 == 1 935 */ 936 if ((dips & 0x80) == 0) { 937 kprintf(" slave"); 938 lwkt_reltoken(&tty_token); 939 return (0); 940 } 941 942 /* 943 * Okay, we seem to be a Hayes ESP card. Whee. 944 */ 945 com->esp = TRUE; 946 com->esp_port = esp_port; 947 lwkt_reltoken(&tty_token); 948 return (1); 949 } 950 #endif /* COM_ESP */ 951 952 static int 953 sio_isa_attach(device_t dev) 954 { 955 return (sioattach(dev, 0, 0UL)); 956 } 957 958 int 959 sioattach(device_t dev, int xrid, u_long rclk) 960 { 961 struct com_s *com; 962 #ifdef COM_ESP 963 Port_t *espp; 964 #endif 965 Port_t iobase; 966 int minorbase; 967 int unit; 968 u_int flags; 969 int rid; 970 struct resource *port; 971 int ret; 972 static int did_init; 973 974 lwkt_gettoken(&tty_token); 975 if (did_init == 0) { 976 did_init = 1; 977 callout_init_mp(&sio_timeout_handle); 978 } 979 980 rid = xrid; 981 port = bus_alloc_resource(dev, SYS_RES_IOPORT, &rid, 982 0, ~0, IO_COMSIZE, RF_ACTIVE); 983 if (!port) { 984 lwkt_reltoken(&tty_token); 985 return (ENXIO); 986 } 987 988 iobase = rman_get_start(port); 989 unit = device_get_unit(dev); 990 com = device_get_softc(dev); 991 flags = device_get_flags(dev); 992 993 if (unit >= sio_numunits) 994 sio_numunits = unit + 1; 995 /* 996 * sioprobe() has initialized the device registers as follows: 997 * o cfcr = CFCR_8BITS. 998 * It is most important that CFCR_DLAB is off, so that the 999 * data port is not hidden when we enable interrupts. 1000 * o ier = 0. 1001 * Interrupts are only enabled when the line is open. 1002 * o mcr = MCR_IENABLE, or 0 if the port has AST/4 compatible 1003 * interrupt control register or the config specifies no irq. 1004 * Keeping MCR_DTR and MCR_RTS off might stop the external 1005 * device from sending before we are ready. 1006 */ 1007 bzero(com, sizeof *com); 1008 com->unit = unit; 1009 com->ioportres = port; 1010 com->bst = rman_get_bustag(port); 1011 com->bsh = rman_get_bushandle(port); 1012 com->cfcr_image = CFCR_8BITS; 1013 com->dtr_wait = 3 * hz; 1014 callout_init_mp(&com->dtr_ch); 1015 callout_init_mp(&com->busy_ch); 1016 com->loses_outints = COM_LOSESOUTINTS(flags) != 0; 1017 com->no_irq = bus_get_resource(dev, SYS_RES_IRQ, 0, NULL, NULL) != 0; 1018 com->tx_fifo_size = 1; 1019 com->obufs[0].l_head = com->obuf1; 1020 com->obufs[1].l_head = com->obuf2; 1021 1022 com->data_port = iobase + com_data; 1023 com->int_id_port = iobase + com_iir; 1024 com->modem_ctl_port = iobase + com_mcr; 1025 com->mcr_image = inb(com->modem_ctl_port); 1026 com->line_status_port = iobase + com_lsr; 1027 com->modem_status_port = iobase + com_msr; 1028 com->intr_ctl_port = iobase + com_ier; 1029 1030 if (rclk == 0) 1031 rclk = DEFAULT_RCLK; 1032 com->rclk = rclk; 1033 1034 /* 1035 * We don't use all the flags from <sys/ttydefaults.h> since they 1036 * are only relevant for logins. It's important to have echo off 1037 * initially so that the line doesn't start blathering before the 1038 * echo flag can be turned off. 1039 */ 1040 com->it_in.c_iflag = 0; 1041 com->it_in.c_oflag = 0; 1042 com->it_in.c_cflag = TTYDEF_CFLAG; 1043 com->it_in.c_lflag = 0; 1044 if (unit == comconsole) { 1045 com->it_in.c_iflag = TTYDEF_IFLAG; 1046 com->it_in.c_oflag = TTYDEF_OFLAG; 1047 com->it_in.c_cflag = TTYDEF_CFLAG | CLOCAL; 1048 com->it_in.c_lflag = TTYDEF_LFLAG; 1049 com->lt_out.c_cflag = com->lt_in.c_cflag = CLOCAL; 1050 com->lt_out.c_ispeed = com->lt_out.c_ospeed = 1051 com->lt_in.c_ispeed = com->lt_in.c_ospeed = 1052 com->it_in.c_ispeed = com->it_in.c_ospeed = comdefaultrate; 1053 } else 1054 com->it_in.c_ispeed = com->it_in.c_ospeed = TTYDEF_SPEED; 1055 if (siosetwater(com, com->it_in.c_ispeed) != 0) { 1056 /* 1057 * Leave i/o resources allocated if this is a `cn'-level 1058 * console, so that other devices can't snarf them. 1059 */ 1060 if (iobase != siocniobase) 1061 bus_release_resource(dev, SYS_RES_IOPORT, rid, port); 1062 lwkt_reltoken(&tty_token); 1063 return (ENOMEM); 1064 } 1065 termioschars(&com->it_in); 1066 com->it_out = com->it_in; 1067 1068 /* attempt to determine UART type */ 1069 kprintf("sio%d: type", unit); 1070 1071 1072 #ifdef COM_MULTIPORT 1073 if (!COM_ISMULTIPORT(flags) && !COM_IIR_TXRDYBUG(flags)) 1074 #else 1075 if (!COM_IIR_TXRDYBUG(flags)) 1076 #endif 1077 { 1078 u_char scr; 1079 u_char scr1; 1080 u_char scr2; 1081 1082 scr = sio_getreg(com, com_scr); 1083 sio_setreg(com, com_scr, 0xa5); 1084 scr1 = sio_getreg(com, com_scr); 1085 sio_setreg(com, com_scr, 0x5a); 1086 scr2 = sio_getreg(com, com_scr); 1087 sio_setreg(com, com_scr, scr); 1088 if (scr1 != 0xa5 || scr2 != 0x5a) { 1089 kprintf(" 8250"); 1090 goto determined_type; 1091 } 1092 } 1093 sio_setreg(com, com_fifo, FIFO_ENABLE | FIFO_RX_HIGH); 1094 DELAY(100); 1095 com->st16650a = 0; 1096 switch (inb(com->int_id_port) & IIR_FIFO_MASK) { 1097 case FIFO_RX_LOW: 1098 kprintf(" 16450"); 1099 break; 1100 case FIFO_RX_MEDL: 1101 kprintf(" 16450?"); 1102 break; 1103 case FIFO_RX_MEDH: 1104 kprintf(" 16550?"); 1105 break; 1106 case FIFO_RX_HIGH: 1107 if (COM_NOFIFO(flags)) { 1108 kprintf(" 16550A fifo disabled"); 1109 } else { 1110 com->hasfifo = TRUE; 1111 if (COM_ST16650A(flags)) { 1112 com->st16650a = 1; 1113 com->tx_fifo_size = 32; 1114 kprintf(" ST16650A"); 1115 } else if (COM_TI16754(flags)) { 1116 com->tx_fifo_size = 64; 1117 kprintf(" TI16754"); 1118 } else { 1119 com->tx_fifo_size = COM_FIFOSIZE(flags); 1120 kprintf(" 16550A"); 1121 } 1122 } 1123 #ifdef COM_ESP 1124 for (espp = likely_esp_ports; *espp != 0; espp++) 1125 if (espattach(com, *espp)) { 1126 com->tx_fifo_size = 1024; 1127 break; 1128 } 1129 #endif 1130 if (!com->st16650a && !COM_TI16754(flags)) { 1131 if (!com->tx_fifo_size) 1132 com->tx_fifo_size = 16; 1133 else 1134 kprintf(" lookalike with %d bytes FIFO", 1135 com->tx_fifo_size); 1136 } 1137 1138 break; 1139 } 1140 1141 #ifdef COM_ESP 1142 if (com->esp) { 1143 /* 1144 * Set 16550 compatibility mode. 1145 * We don't use the ESP_MODE_SCALE bit to increase the 1146 * fifo trigger levels because we can't handle large 1147 * bursts of input. 1148 * XXX flow control should be set in comparam(), not here. 1149 */ 1150 outb(com->esp_port + ESP_CMD1, ESP_SETMODE); 1151 outb(com->esp_port + ESP_CMD2, ESP_MODE_RTS | ESP_MODE_FIFO); 1152 1153 /* Set RTS/CTS flow control. */ 1154 outb(com->esp_port + ESP_CMD1, ESP_SETFLOWTYPE); 1155 outb(com->esp_port + ESP_CMD2, ESP_FLOW_RTS); 1156 outb(com->esp_port + ESP_CMD2, ESP_FLOW_CTS); 1157 1158 /* Set flow-control levels. */ 1159 outb(com->esp_port + ESP_CMD1, ESP_SETRXFLOW); 1160 outb(com->esp_port + ESP_CMD2, HIBYTE(768)); 1161 outb(com->esp_port + ESP_CMD2, LOBYTE(768)); 1162 outb(com->esp_port + ESP_CMD2, HIBYTE(512)); 1163 outb(com->esp_port + ESP_CMD2, LOBYTE(512)); 1164 } 1165 #endif /* COM_ESP */ 1166 sio_setreg(com, com_fifo, 0); 1167 determined_type: ; 1168 1169 #ifdef COM_MULTIPORT 1170 if (COM_ISMULTIPORT(flags)) { 1171 device_t masterdev; 1172 1173 com->multiport = TRUE; 1174 kprintf(" (multiport"); 1175 if (unit == COM_MPMASTER(flags)) 1176 kprintf(" master"); 1177 kprintf(")"); 1178 masterdev = devclass_get_device(sio_devclass, 1179 COM_MPMASTER(flags)); 1180 com->no_irq = (masterdev == NULL || bus_get_resource(masterdev, 1181 SYS_RES_IRQ, 0, NULL, NULL) != 0); 1182 } 1183 #endif /* COM_MULTIPORT */ 1184 if (unit == comconsole) 1185 kprintf(", console"); 1186 if (COM_IIR_TXRDYBUG(flags)) 1187 kprintf(" with a bogus IIR_TXRDY register"); 1188 kprintf("\n"); 1189 1190 if (!sio_registered) { 1191 register_swi(SWI_TTY, siopoll, NULL ,"swi_siopoll", NULL, -1); 1192 sio_registered = TRUE; 1193 } 1194 minorbase = UNIT_TO_MINOR(unit); 1195 make_dev(&sio_ops, minorbase, 1196 UID_ROOT, GID_WHEEL, 0600, "ttyd%r", unit); 1197 make_dev(&sio_ops, minorbase | CONTROL_INIT_STATE, 1198 UID_ROOT, GID_WHEEL, 0600, "ttyid%r", unit); 1199 make_dev(&sio_ops, minorbase | CONTROL_LOCK_STATE, 1200 UID_ROOT, GID_WHEEL, 0600, "ttyld%r", unit); 1201 make_dev(&sio_ops, minorbase | CALLOUT_MASK, 1202 UID_UUCP, GID_DIALER, 0660, "cuaa%r", unit); 1203 make_dev(&sio_ops, minorbase | CALLOUT_MASK | CONTROL_INIT_STATE, 1204 UID_UUCP, GID_DIALER, 0660, "cuaia%r", unit); 1205 make_dev(&sio_ops, minorbase | CALLOUT_MASK | CONTROL_LOCK_STATE, 1206 UID_UUCP, GID_DIALER, 0660, "cuala%r", unit); 1207 com->flags = flags; 1208 com->pps.ppscap = PPS_CAPTUREASSERT | PPS_CAPTURECLEAR; 1209 pps_init(&com->pps); 1210 1211 rid = 0; 1212 com->irqres = bus_alloc_resource(dev, SYS_RES_IRQ, &rid, 0ul, ~0ul, 1, 1213 RF_ACTIVE); 1214 if (com->irqres) { 1215 ret = BUS_SETUP_INTR(device_get_parent(dev), dev, 1216 com->irqres, INTR_MPSAFE, siointr, com, 1217 &com->cookie, NULL, NULL); 1218 if (ret) 1219 device_printf(dev, "could not activate interrupt\n"); 1220 #if defined(DDB) 1221 /* 1222 * Enable interrupts for early break-to-debugger support 1223 * on the console. 1224 */ 1225 if (ret == 0 && unit == comconsole && 1226 (break_to_debugger || alt_break_to_debugger)) { 1227 outb(siocniobase + com_ier, IER_ERXRDY | IER_ERLS | 1228 IER_EMSC); 1229 } 1230 #endif 1231 } 1232 1233 lwkt_reltoken(&tty_token); 1234 return (0); 1235 } 1236 1237 static int 1238 sioopen(struct dev_open_args *ap) 1239 { 1240 cdev_t dev = ap->a_head.a_dev; 1241 struct com_s *com; 1242 int error; 1243 int mynor; 1244 struct tty *tp; 1245 int unit; 1246 1247 mynor = minor(dev); 1248 unit = MINOR_TO_UNIT(mynor); 1249 com = com_addr(unit); 1250 if (com == NULL) 1251 return (ENXIO); 1252 if (com->gone) 1253 return (ENXIO); 1254 if (mynor & CONTROL_MASK) 1255 return (0); 1256 lwkt_gettoken(&tty_token); 1257 tp = dev->si_tty = com->tp = ttymalloc(com->tp); 1258 crit_enter(); 1259 /* 1260 * We jump to this label after all non-interrupted sleeps to pick 1261 * up any changes of the device state. 1262 */ 1263 open_top: 1264 while (com->state & CS_DTR_OFF) { 1265 error = tsleep(&com->dtr_wait, PCATCH, "siodtr", 0); 1266 if (com_addr(unit) == NULL) { 1267 crit_exit(); 1268 lwkt_reltoken(&tty_token); 1269 return (ENXIO); 1270 } 1271 if (error != 0 || com->gone) 1272 goto out; 1273 } 1274 if (tp->t_state & TS_ISOPEN) { 1275 /* 1276 * The device is open, so everything has been initialized. 1277 * Handle conflicts. 1278 */ 1279 if (mynor & CALLOUT_MASK) { 1280 if (!com->active_out) { 1281 error = EBUSY; 1282 goto out; 1283 } 1284 } else { 1285 if (com->active_out) { 1286 if (ap->a_oflags & O_NONBLOCK) { 1287 error = EBUSY; 1288 goto out; 1289 } 1290 error = tsleep(&com->active_out, 1291 PCATCH, "siobi", 0); 1292 if (com_addr(unit) == NULL) { 1293 crit_exit(); 1294 lwkt_reltoken(&tty_token); 1295 return (ENXIO); 1296 } 1297 if (error != 0 || com->gone) 1298 goto out; 1299 goto open_top; 1300 } 1301 } 1302 if (tp->t_state & TS_XCLUDE && priv_check_cred(ap->a_cred, PRIV_ROOT, 0)) { 1303 error = EBUSY; 1304 goto out; 1305 } 1306 } else { 1307 /* 1308 * The device isn't open, so there are no conflicts. 1309 * Initialize it. Initialization is done twice in many 1310 * cases: to preempt sleeping callin opens if we are 1311 * callout, and to complete a callin open after DCD rises. 1312 */ 1313 tp->t_oproc = comstart; 1314 tp->t_param = comparam; 1315 tp->t_stop = comstop; 1316 tp->t_dev = dev; 1317 tp->t_termios = mynor & CALLOUT_MASK 1318 ? com->it_out : com->it_in; 1319 (void)commctl(com, TIOCM_DTR | TIOCM_RTS, DMSET); 1320 com->poll = com->no_irq; 1321 com->poll_output = com->loses_outints; 1322 ++com->wopeners; 1323 error = comparam(tp, &tp->t_termios); 1324 --com->wopeners; 1325 if (error != 0) 1326 goto out; 1327 /* 1328 * XXX we should goto open_top if comparam() slept. 1329 */ 1330 if (com->hasfifo) { 1331 /* 1332 * (Re)enable and drain fifos. 1333 * 1334 * Certain SMC chips cause problems if the fifos 1335 * are enabled while input is ready. Turn off the 1336 * fifo if necessary to clear the input. We test 1337 * the input ready bit after enabling the fifos 1338 * since we've already enabled them in comparam() 1339 * and to handle races between enabling and fresh 1340 * input. 1341 */ 1342 while (TRUE) { 1343 sio_setreg(com, com_fifo, 1344 FIFO_RCV_RST | FIFO_XMT_RST 1345 | com->fifo_image); 1346 /* 1347 * XXX the delays are for superstitious 1348 * historical reasons. It must be less than 1349 * the character time at the maximum 1350 * supported speed (87 usec at 115200 bps 1351 * 8N1). Otherwise we might loop endlessly 1352 * if data is streaming in. We used to use 1353 * delays of 100. That usually worked 1354 * because DELAY(100) used to usually delay 1355 * for about 85 usec instead of 100. 1356 */ 1357 DELAY(50); 1358 if (!(inb(com->line_status_port) & LSR_RXRDY)) 1359 break; 1360 sio_setreg(com, com_fifo, 0); 1361 DELAY(50); 1362 (void) inb(com->data_port); 1363 } 1364 } 1365 1366 com_lock(); 1367 (void) inb(com->line_status_port); 1368 (void) inb(com->data_port); 1369 com->prev_modem_status = com->last_modem_status 1370 = inb(com->modem_status_port); 1371 if (COM_IIR_TXRDYBUG(com->flags)) { 1372 outb(com->intr_ctl_port, IER_ERXRDY | IER_ERLS 1373 | IER_EMSC); 1374 } else { 1375 outb(com->intr_ctl_port, IER_ERXRDY | IER_ETXRDY 1376 | IER_ERLS | IER_EMSC); 1377 } 1378 com_unlock(); 1379 /* 1380 * Handle initial DCD. Callout devices get a fake initial 1381 * DCD (trapdoor DCD). If we are callout, then any sleeping 1382 * callin opens get woken up and resume sleeping on "siobi" 1383 * instead of "siodcd". 1384 */ 1385 /* 1386 * XXX `mynor & CALLOUT_MASK' should be 1387 * `tp->t_cflag & (SOFT_CARRIER | TRAPDOOR_CARRIER) where 1388 * TRAPDOOR_CARRIER is the default initial state for callout 1389 * devices and SOFT_CARRIER is like CLOCAL except it hides 1390 * the true carrier. 1391 */ 1392 if (com->prev_modem_status & MSR_DCD || mynor & CALLOUT_MASK) 1393 (*linesw[tp->t_line].l_modem)(tp, 1); 1394 } 1395 /* 1396 * Wait for DCD if necessary. 1397 */ 1398 if (!(tp->t_state & TS_CARR_ON) && !(mynor & CALLOUT_MASK) 1399 && !(tp->t_cflag & CLOCAL) && !(ap->a_oflags & O_NONBLOCK)) { 1400 ++com->wopeners; 1401 error = tsleep(TSA_CARR_ON(tp), PCATCH, "siodcd", 0); 1402 if (com_addr(unit) == NULL) { 1403 crit_exit(); 1404 lwkt_reltoken(&tty_token); 1405 return (ENXIO); 1406 } 1407 --com->wopeners; 1408 if (error != 0 || com->gone) 1409 goto out; 1410 goto open_top; 1411 } 1412 error = (*linesw[tp->t_line].l_open)(dev, tp); 1413 disc_optim(tp, &tp->t_termios, com); 1414 if (tp->t_state & TS_ISOPEN && mynor & CALLOUT_MASK) 1415 com->active_out = TRUE; 1416 siosettimeout(); 1417 out: 1418 crit_exit(); 1419 if (!(tp->t_state & TS_ISOPEN) && com->wopeners == 0) 1420 comhardclose(com); 1421 lwkt_reltoken(&tty_token); 1422 return (error); 1423 } 1424 1425 static int 1426 sioclose(struct dev_close_args *ap) 1427 { 1428 cdev_t dev = ap->a_head.a_dev; 1429 struct com_s *com; 1430 int mynor; 1431 struct tty *tp; 1432 1433 mynor = minor(dev); 1434 if (mynor & CONTROL_MASK) 1435 return (0); 1436 lwkt_gettoken(&tty_token); 1437 com = com_addr(MINOR_TO_UNIT(mynor)); 1438 if (com == NULL) { 1439 lwkt_reltoken(&tty_token); 1440 return (ENODEV); 1441 } 1442 tp = com->tp; 1443 crit_enter(); 1444 (*linesw[tp->t_line].l_close)(tp, ap->a_fflag); 1445 disc_optim(tp, &tp->t_termios, com); 1446 comstop(tp, FREAD | FWRITE); 1447 comhardclose(com); 1448 ttyclose(tp); 1449 siosettimeout(); 1450 crit_exit(); 1451 if (com->gone) { 1452 kprintf("sio%d: gone\n", com->unit); 1453 crit_enter(); 1454 if (com->ibuf != NULL) 1455 kfree(com->ibuf, M_DEVBUF); 1456 bzero(tp, sizeof *tp); 1457 crit_exit(); 1458 } 1459 lwkt_reltoken(&tty_token); 1460 return (0); 1461 } 1462 1463 static void 1464 comhardclose(struct com_s *com) 1465 { 1466 struct tty *tp; 1467 crit_enter(); 1468 lwkt_gettoken(&tty_token); 1469 com->poll = FALSE; 1470 com->poll_output = FALSE; 1471 com->do_timestamp = FALSE; 1472 com->do_dcd_timestamp = FALSE; 1473 com->pps.ppsparam.mode = 0; 1474 sio_setreg(com, com_cfcr, com->cfcr_image &= ~CFCR_SBREAK); 1475 tp = com->tp; 1476 1477 #if defined(DDB) 1478 /* 1479 * Leave interrupts enabled and don't clear DTR if this is the 1480 * console. This allows us to detect break-to-debugger events 1481 * while the console device is closed. 1482 */ 1483 if (com->unit != comconsole || 1484 (break_to_debugger == 0 && alt_break_to_debugger == 0)) 1485 #endif 1486 { 1487 sio_setreg(com, com_ier, 0); 1488 if (tp->t_cflag & HUPCL 1489 /* 1490 * XXX we will miss any carrier drop between here and the 1491 * next open. Perhaps we should watch DCD even when the 1492 * port is closed; it is not sufficient to check it at 1493 * the next open because it might go up and down while 1494 * we're not watching. 1495 */ 1496 || (!com->active_out 1497 && !(com->prev_modem_status & MSR_DCD) 1498 && !(com->it_in.c_cflag & CLOCAL)) 1499 || !(tp->t_state & TS_ISOPEN)) { 1500 (void)commctl(com, TIOCM_DTR, DMBIC); 1501 if (com->dtr_wait != 0 && !(com->state & CS_DTR_OFF)) { 1502 callout_reset(&com->dtr_ch, com->dtr_wait, 1503 siodtrwakeup, com); 1504 com->state |= CS_DTR_OFF; 1505 } 1506 } 1507 } 1508 if (com->hasfifo) { 1509 /* 1510 * Disable fifos so that they are off after controlled 1511 * reboots. Some BIOSes fail to detect 16550s when the 1512 * fifos are enabled. 1513 */ 1514 sio_setreg(com, com_fifo, 0); 1515 } 1516 com->active_out = FALSE; 1517 wakeup(&com->active_out); 1518 wakeup(TSA_CARR_ON(tp)); /* restart any wopeners */ 1519 lwkt_reltoken(&tty_token); 1520 crit_exit(); 1521 } 1522 1523 static int 1524 sioread(struct dev_read_args *ap) 1525 { 1526 cdev_t dev = ap->a_head.a_dev; 1527 int mynor, ret; 1528 struct com_s *com; 1529 1530 lwkt_gettoken(&tty_token); 1531 mynor = minor(dev); 1532 if (mynor & CONTROL_MASK) { 1533 lwkt_reltoken(&tty_token); 1534 return (ENODEV); 1535 } 1536 com = com_addr(MINOR_TO_UNIT(mynor)); 1537 if (com == NULL || com->gone) { 1538 lwkt_reltoken(&tty_token); 1539 return (ENODEV); 1540 } 1541 ret = ((*linesw[com->tp->t_line].l_read)(com->tp, ap->a_uio, ap->a_ioflag)); 1542 lwkt_reltoken(&tty_token); 1543 return ret; 1544 } 1545 1546 static int 1547 siowrite(struct dev_write_args *ap) 1548 { 1549 cdev_t dev = ap->a_head.a_dev; 1550 int mynor; 1551 struct com_s *com; 1552 int unit, ret; 1553 1554 lwkt_gettoken(&tty_token); 1555 mynor = minor(dev); 1556 if (mynor & CONTROL_MASK) { 1557 lwkt_reltoken(&tty_token); 1558 return (ENODEV); 1559 } 1560 1561 unit = MINOR_TO_UNIT(mynor); 1562 com = com_addr(unit); 1563 if (com == NULL || com->gone) { 1564 lwkt_reltoken(&tty_token); 1565 return (ENODEV); 1566 } 1567 /* 1568 * (XXX) We disallow virtual consoles if the physical console is 1569 * a serial port. This is in case there is a display attached that 1570 * is not the console. In that situation we don't need/want the X 1571 * server taking over the console. 1572 */ 1573 if (constty != NULL && unit == comconsole) 1574 constty = NULL; 1575 ret = ((*linesw[com->tp->t_line].l_write)(com->tp, ap->a_uio, ap->a_ioflag)); 1576 lwkt_reltoken(&tty_token); 1577 return ret; 1578 } 1579 1580 static void 1581 siobusycheck(void *chan) 1582 { 1583 struct com_s *com; 1584 1585 lwkt_gettoken(&tty_token); 1586 com = (struct com_s *)chan; 1587 1588 /* 1589 * Clear TS_BUSY if low-level output is complete. 1590 * spl locking is sufficient because siointr1() does not set CS_BUSY. 1591 * If siointr1() clears CS_BUSY after we look at it, then we'll get 1592 * called again. Reading the line status port outside of siointr1() 1593 * is safe because CS_BUSY is clear so there are no output interrupts 1594 * to lose. 1595 */ 1596 crit_enter(); 1597 if (com->state & CS_BUSY) 1598 com->extra_state &= ~CSE_BUSYCHECK; /* False alarm. */ 1599 else if ((inb(com->line_status_port) & (LSR_TSRE | LSR_TXRDY)) 1600 == (LSR_TSRE | LSR_TXRDY)) { 1601 com->tp->t_state &= ~TS_BUSY; 1602 ttwwakeup(com->tp); 1603 com->extra_state &= ~CSE_BUSYCHECK; 1604 } else { 1605 callout_reset(&com->busy_ch, hz / 100, siobusycheck, com); 1606 } 1607 crit_exit(); 1608 lwkt_reltoken(&tty_token); 1609 } 1610 1611 static u_int 1612 siodivisor(u_long rclk, speed_t speed) 1613 { 1614 long actual_speed; 1615 u_int divisor; 1616 int error; 1617 1618 if (speed == 0 || speed > ((speed_t)-1 - 1) / 8) 1619 return (0); 1620 divisor = (rclk / (8UL * speed) + 1) / 2; 1621 if (divisor == 0 || divisor >= 65536) 1622 return (0); 1623 actual_speed = rclk / (16UL * divisor); 1624 1625 /* 10 times error in percent: */ 1626 error = ((actual_speed - (long)speed) * 2000 / (long)speed + 1) / 2; 1627 1628 /* 3.0% maximum error tolerance: */ 1629 if (error < -30 || error > 30) 1630 return (0); 1631 1632 return (divisor); 1633 } 1634 1635 static void 1636 siodtrwakeup(void *chan) 1637 { 1638 struct com_s *com; 1639 1640 lwkt_gettoken(&tty_token); 1641 com = (struct com_s *)chan; 1642 com->state &= ~CS_DTR_OFF; 1643 wakeup(&com->dtr_wait); 1644 lwkt_reltoken(&tty_token); 1645 } 1646 1647 /* 1648 * NOTE: Normally called with tty_token held but might not be when 1649 * operating as the console. 1650 * 1651 * Must be called with com_lock 1652 */ 1653 static void 1654 sioinput(struct com_s *com) 1655 { 1656 u_char *buf; 1657 int incc; 1658 u_char line_status; 1659 int recv_data; 1660 struct tty *tp; 1661 1662 buf = com->ibuf; 1663 tp = com->tp; 1664 if (!(tp->t_state & TS_ISOPEN) || !(tp->t_cflag & CREAD)) { 1665 com_events -= (com->iptr - com->ibuf); 1666 com->iptr = com->ibuf; 1667 return; 1668 } 1669 if (tp->t_state & TS_CAN_BYPASS_L_RINT) { 1670 /* 1671 * Avoid the grotesquely inefficient lineswitch routine 1672 * (ttyinput) in "raw" mode. It usually takes about 450 1673 * instructions (that's without canonical processing or echo!). 1674 * slinput is reasonably fast (usually 40 instructions plus 1675 * call overhead). 1676 */ 1677 do { 1678 com_unlock(); 1679 incc = com->iptr - buf; 1680 if (tp->t_rawq.c_cc + incc > tp->t_ihiwat 1681 && (com->state & CS_RTS_IFLOW 1682 || tp->t_iflag & IXOFF) 1683 && !(tp->t_state & TS_TBLOCK)) 1684 ttyblock(tp); 1685 com->delta_error_counts[CE_TTY_BUF_OVERFLOW] 1686 += b_to_q((char *)buf, incc, &tp->t_rawq); 1687 buf += incc; 1688 tk_nin += incc; 1689 tk_rawcc += incc; 1690 tp->t_rawcc += incc; 1691 ttwakeup(tp); 1692 if (tp->t_state & TS_TTSTOP 1693 && (tp->t_iflag & IXANY 1694 || tp->t_cc[VSTART] == tp->t_cc[VSTOP])) { 1695 tp->t_state &= ~TS_TTSTOP; 1696 tp->t_lflag &= ~FLUSHO; 1697 comstart(tp); 1698 } 1699 com_lock(); 1700 } while (buf < com->iptr); 1701 } else { 1702 do { 1703 com_unlock(); 1704 line_status = buf[com->ierroff]; 1705 recv_data = *buf++; 1706 if (line_status 1707 & (LSR_BI | LSR_FE | LSR_OE | LSR_PE)) { 1708 if (line_status & LSR_BI) 1709 recv_data |= TTY_BI; 1710 if (line_status & LSR_FE) 1711 recv_data |= TTY_FE; 1712 if (line_status & LSR_OE) 1713 recv_data |= TTY_OE; 1714 if (line_status & LSR_PE) 1715 recv_data |= TTY_PE; 1716 } 1717 (*linesw[tp->t_line].l_rint)(recv_data, tp); 1718 com_lock(); 1719 } while (buf < com->iptr); 1720 } 1721 com_events -= (com->iptr - com->ibuf); 1722 com->iptr = com->ibuf; 1723 1724 /* 1725 * There is now room for another low-level buffer full of input, 1726 * so enable RTS if it is now disabled and there is room in the 1727 * high-level buffer. 1728 */ 1729 if ((com->state & CS_RTS_IFLOW) && !(com->mcr_image & MCR_RTS) && 1730 !(tp->t_state & TS_TBLOCK)) 1731 outb(com->modem_ctl_port, com->mcr_image |= MCR_RTS); 1732 } 1733 1734 void 1735 siointr(void *arg) 1736 { 1737 lwkt_gettoken(&tty_token); 1738 #ifndef COM_MULTIPORT 1739 com_lock(); 1740 siointr1((struct com_s *) arg); 1741 com_unlock(); 1742 #else /* COM_MULTIPORT */ 1743 bool_t possibly_more_intrs; 1744 int unit; 1745 struct com_s *com; 1746 1747 /* 1748 * Loop until there is no activity on any port. This is necessary 1749 * to get an interrupt edge more than to avoid another interrupt. 1750 * If the IRQ signal is just an OR of the IRQ signals from several 1751 * devices, then the edge from one may be lost because another is 1752 * on. 1753 */ 1754 com_lock(); 1755 do { 1756 possibly_more_intrs = FALSE; 1757 for (unit = 0; unit < sio_numunits; ++unit) { 1758 com = com_addr(unit); 1759 /* 1760 * XXX com_lock(); 1761 * would it work here, or be counter-productive? 1762 */ 1763 if (com != NULL 1764 && !com->gone 1765 && (inb(com->int_id_port) & IIR_IMASK) 1766 != IIR_NOPEND) { 1767 siointr1(com); 1768 possibly_more_intrs = TRUE; 1769 } 1770 /* XXX com_unlock(); */ 1771 } 1772 } while (possibly_more_intrs); 1773 com_unlock(); 1774 #endif /* COM_MULTIPORT */ 1775 lwkt_reltoken(&tty_token); 1776 } 1777 1778 /* 1779 * Called with tty_token held and com_lock held. 1780 */ 1781 static void 1782 siointr1(struct com_s *com) 1783 { 1784 u_char line_status; 1785 u_char modem_status; 1786 u_char *ioptr; 1787 u_char recv_data; 1788 u_char int_ctl; 1789 u_char int_ctl_new; 1790 u_int count; 1791 1792 int_ctl = inb(com->intr_ctl_port); 1793 int_ctl_new = int_ctl; 1794 1795 while (!com->gone) { 1796 if (com->pps.ppsparam.mode & PPS_CAPTUREBOTH) { 1797 modem_status = inb(com->modem_status_port); 1798 if ((modem_status ^ com->last_modem_status) & MSR_DCD) { 1799 count = sys_cputimer->count(); 1800 pps_event(&com->pps, count, 1801 (modem_status & MSR_DCD) ? 1802 PPS_CAPTUREASSERT : PPS_CAPTURECLEAR); 1803 } 1804 } 1805 line_status = inb(com->line_status_port); 1806 1807 /* input event? (check first to help avoid overruns) */ 1808 while (line_status & LSR_RCV_MASK) { 1809 /* break/unnattached error bits or real input? */ 1810 if (!(line_status & LSR_RXRDY)) 1811 recv_data = 0; 1812 else 1813 recv_data = inb(com->data_port); 1814 #if defined(DDB) 1815 /* 1816 * Solaris implements a new BREAK which is initiated 1817 * by a character sequence CR ~ ^b which is similar 1818 * to a familiar pattern used on Sun servers by the 1819 * Remote Console. 1820 */ 1821 #define KEY_CRTLB 2 /* ^B */ 1822 #define KEY_CR 13 /* CR '\r' */ 1823 #define KEY_TILDE 126 /* ~ */ 1824 1825 if (com->unit == comconsole && alt_break_to_debugger) { 1826 static int brk_state1 = 0, brk_state2 = 0; 1827 if (recv_data == KEY_CR) { 1828 brk_state1 = recv_data; 1829 brk_state2 = 0; 1830 } else if (brk_state1 == KEY_CR && (recv_data == KEY_TILDE || recv_data == KEY_CRTLB)) { 1831 if (recv_data == KEY_TILDE) 1832 brk_state2 = recv_data; 1833 else if (brk_state2 == KEY_TILDE && recv_data == KEY_CRTLB) { 1834 com_unlock(); 1835 breakpoint(); 1836 com_lock(); 1837 brk_state1 = brk_state2 = 0; 1838 goto cont; 1839 } else 1840 brk_state2 = 0; 1841 } else 1842 brk_state1 = 0; 1843 } 1844 #endif 1845 if (line_status & (LSR_BI | LSR_FE | LSR_PE)) { 1846 /* 1847 * Don't store BI if IGNBRK or FE/PE if IGNPAR. 1848 * Otherwise, push the work to a higher level 1849 * (to handle PARMRK) if we're bypassing. 1850 * Otherwise, convert BI/FE and PE+INPCK to 0. 1851 * 1852 * This makes bypassing work right in the 1853 * usual "raw" case (IGNBRK set, and IGNPAR 1854 * and INPCK clear). 1855 * 1856 * Note: BI together with FE/PE means just BI. 1857 */ 1858 if (line_status & LSR_BI) { 1859 #if defined(DDB) 1860 if (com->unit == comconsole && 1861 break_to_debugger) { 1862 com_unlock(); 1863 breakpoint(); 1864 com_lock(); 1865 goto cont; 1866 } 1867 #endif 1868 if (com->tp == NULL 1869 || com->tp->t_iflag & IGNBRK) 1870 goto cont; 1871 } else { 1872 if (com->tp == NULL 1873 || com->tp->t_iflag & IGNPAR) 1874 goto cont; 1875 } 1876 if (com->tp->t_state & TS_CAN_BYPASS_L_RINT 1877 && (line_status & (LSR_BI | LSR_FE) 1878 || com->tp->t_iflag & INPCK)) 1879 recv_data = 0; 1880 } 1881 ++com->bytes_in; 1882 if (com->hotchar != 0 && recv_data == com->hotchar) 1883 setsofttty(); 1884 ioptr = com->iptr; 1885 if (ioptr >= com->ibufend) 1886 CE_RECORD(com, CE_INTERRUPT_BUF_OVERFLOW); 1887 else { 1888 if (com->do_timestamp) 1889 microtime(&com->timestamp); 1890 ++com_events; 1891 schedsofttty(); 1892 #if 0 /* for testing input latency vs efficiency */ 1893 if (com->iptr - com->ibuf == 8) 1894 setsofttty(); 1895 #endif 1896 ioptr[0] = recv_data; 1897 ioptr[com->ierroff] = line_status; 1898 com->iptr = ++ioptr; 1899 if (ioptr == com->ihighwater 1900 && com->state & CS_RTS_IFLOW) 1901 outb(com->modem_ctl_port, 1902 com->mcr_image &= ~MCR_RTS); 1903 if (line_status & LSR_OE) 1904 CE_RECORD(com, CE_OVERRUN); 1905 } 1906 cont: 1907 /* 1908 * "& 0x7F" is to avoid the gcc-1.40 generating a slow 1909 * jump from the top of the loop to here 1910 */ 1911 line_status = inb(com->line_status_port) & 0x7F; 1912 } 1913 1914 /* modem status change? (always check before doing output) */ 1915 modem_status = inb(com->modem_status_port); 1916 if (modem_status != com->last_modem_status) { 1917 if (com->do_dcd_timestamp 1918 && !(com->last_modem_status & MSR_DCD) 1919 && modem_status & MSR_DCD) 1920 microtime(&com->dcd_timestamp); 1921 1922 /* 1923 * Schedule high level to handle DCD changes. Note 1924 * that we don't use the delta bits anywhere. Some 1925 * UARTs mess them up, and it's easy to remember the 1926 * previous bits and calculate the delta. 1927 */ 1928 com->last_modem_status = modem_status; 1929 if (!(com->state & CS_CHECKMSR)) { 1930 com_events += LOTS_OF_EVENTS; 1931 com->state |= CS_CHECKMSR; 1932 setsofttty(); 1933 } 1934 1935 /* handle CTS change immediately for crisp flow ctl */ 1936 if (com->state & CS_CTS_OFLOW) { 1937 if (modem_status & MSR_CTS) 1938 com->state |= CS_ODEVREADY; 1939 else 1940 com->state &= ~CS_ODEVREADY; 1941 } 1942 } 1943 1944 /* output queued and everything ready? */ 1945 if (line_status & LSR_TXRDY 1946 && com->state >= (CS_BUSY | CS_TTGO | CS_ODEVREADY)) { 1947 ioptr = com->obufq.l_head; 1948 if (com->tx_fifo_size > 1) { 1949 u_int ocount; 1950 1951 ocount = com->obufq.l_tail - ioptr; 1952 if (ocount > com->tx_fifo_size) 1953 ocount = com->tx_fifo_size; 1954 com->bytes_out += ocount; 1955 do 1956 outb(com->data_port, *ioptr++); 1957 while (--ocount != 0); 1958 } else { 1959 outb(com->data_port, *ioptr++); 1960 ++com->bytes_out; 1961 } 1962 com->obufq.l_head = ioptr; 1963 if (COM_IIR_TXRDYBUG(com->flags)) { 1964 int_ctl_new = int_ctl | IER_ETXRDY; 1965 } 1966 if (ioptr >= com->obufq.l_tail) { 1967 struct lbq *qp; 1968 1969 qp = com->obufq.l_next; 1970 qp->l_queued = FALSE; 1971 qp = qp->l_next; 1972 if (qp != NULL) { 1973 com->obufq.l_head = qp->l_head; 1974 com->obufq.l_tail = qp->l_tail; 1975 com->obufq.l_next = qp; 1976 } else { 1977 /* output just completed */ 1978 if (COM_IIR_TXRDYBUG(com->flags)) { 1979 int_ctl_new = int_ctl & ~IER_ETXRDY; 1980 } 1981 com->state &= ~CS_BUSY; 1982 } 1983 if (!(com->state & CS_ODONE)) { 1984 com_events += LOTS_OF_EVENTS; 1985 com->state |= CS_ODONE; 1986 setsofttty(); /* handle at high level ASAP */ 1987 } 1988 } 1989 if (COM_IIR_TXRDYBUG(com->flags) && (int_ctl != int_ctl_new)) { 1990 outb(com->intr_ctl_port, int_ctl_new); 1991 } 1992 } 1993 1994 /* finished? */ 1995 #ifndef COM_MULTIPORT 1996 if ((inb(com->int_id_port) & IIR_IMASK) == IIR_NOPEND) 1997 #endif /* COM_MULTIPORT */ 1998 { 1999 return; 2000 } 2001 } 2002 } 2003 2004 static int 2005 sioioctl(struct dev_ioctl_args *ap) 2006 { 2007 cdev_t dev = ap->a_head.a_dev; 2008 caddr_t data = ap->a_data; 2009 struct com_s *com; 2010 int error; 2011 int mynor; 2012 struct tty *tp; 2013 #if defined(COMPAT_43) 2014 u_long oldcmd; 2015 struct termios term; 2016 #endif 2017 lwkt_gettoken(&tty_token); 2018 mynor = minor(dev); 2019 2020 com = com_addr(MINOR_TO_UNIT(mynor)); 2021 if (com == NULL || com->gone) { 2022 lwkt_reltoken(&tty_token); 2023 return (ENODEV); 2024 } 2025 if (mynor & CONTROL_MASK) { 2026 struct termios *ct; 2027 2028 switch (mynor & CONTROL_MASK) { 2029 case CONTROL_INIT_STATE: 2030 ct = mynor & CALLOUT_MASK ? &com->it_out : &com->it_in; 2031 break; 2032 case CONTROL_LOCK_STATE: 2033 ct = mynor & CALLOUT_MASK ? &com->lt_out : &com->lt_in; 2034 break; 2035 default: 2036 lwkt_reltoken(&tty_token); 2037 return (ENODEV); /* /dev/nodev */ 2038 } 2039 switch (ap->a_cmd) { 2040 case TIOCSETA: 2041 error = priv_check_cred(ap->a_cred, PRIV_ROOT, 0); 2042 if (error != 0) 2043 return (error); 2044 *ct = *(struct termios *)data; 2045 lwkt_reltoken(&tty_token); 2046 return (0); 2047 case TIOCGETA: 2048 *(struct termios *)data = *ct; 2049 lwkt_reltoken(&tty_token); 2050 return (0); 2051 case TIOCGETD: 2052 *(int *)data = TTYDISC; 2053 lwkt_reltoken(&tty_token); 2054 return (0); 2055 case TIOCGWINSZ: 2056 bzero(data, sizeof(struct winsize)); 2057 lwkt_reltoken(&tty_token); 2058 return (0); 2059 default: 2060 lwkt_reltoken(&tty_token); 2061 return (ENOTTY); 2062 } 2063 } 2064 tp = com->tp; 2065 #if defined(COMPAT_43) 2066 term = tp->t_termios; 2067 oldcmd = ap->a_cmd; 2068 error = ttsetcompat(tp, &ap->a_cmd, data, &term); 2069 if (error != 0) { 2070 lwkt_reltoken(&tty_token); 2071 return (error); 2072 } 2073 if (ap->a_cmd != oldcmd) 2074 data = (caddr_t)&term; 2075 #endif 2076 if (ap->a_cmd == TIOCSETA || ap->a_cmd == TIOCSETAW || 2077 ap->a_cmd == TIOCSETAF) { 2078 int cc; 2079 struct termios *dt = (struct termios *)data; 2080 struct termios *lt = mynor & CALLOUT_MASK 2081 ? &com->lt_out : &com->lt_in; 2082 2083 dt->c_iflag = (tp->t_iflag & lt->c_iflag) 2084 | (dt->c_iflag & ~lt->c_iflag); 2085 dt->c_oflag = (tp->t_oflag & lt->c_oflag) 2086 | (dt->c_oflag & ~lt->c_oflag); 2087 dt->c_cflag = (tp->t_cflag & lt->c_cflag) 2088 | (dt->c_cflag & ~lt->c_cflag); 2089 dt->c_lflag = (tp->t_lflag & lt->c_lflag) 2090 | (dt->c_lflag & ~lt->c_lflag); 2091 for (cc = 0; cc < NCCS; ++cc) 2092 if (lt->c_cc[cc] != 0) 2093 dt->c_cc[cc] = tp->t_cc[cc]; 2094 if (lt->c_ispeed != 0) 2095 dt->c_ispeed = tp->t_ispeed; 2096 if (lt->c_ospeed != 0) 2097 dt->c_ospeed = tp->t_ospeed; 2098 } 2099 error = (*linesw[tp->t_line].l_ioctl)(tp, ap->a_cmd, data, ap->a_fflag, ap->a_cred); 2100 if (error != ENOIOCTL) { 2101 lwkt_reltoken(&tty_token); 2102 return (error); 2103 } 2104 crit_enter(); 2105 error = ttioctl(tp, ap->a_cmd, data, ap->a_fflag); 2106 disc_optim(tp, &tp->t_termios, com); 2107 if (error != ENOIOCTL) { 2108 crit_exit(); 2109 lwkt_reltoken(&tty_token); 2110 return (error); 2111 } 2112 switch (ap->a_cmd) { 2113 case TIOCSBRK: 2114 sio_setreg(com, com_cfcr, com->cfcr_image |= CFCR_SBREAK); 2115 break; 2116 case TIOCCBRK: 2117 sio_setreg(com, com_cfcr, com->cfcr_image &= ~CFCR_SBREAK); 2118 break; 2119 case TIOCSDTR: 2120 (void)commctl(com, TIOCM_DTR, DMBIS); 2121 break; 2122 case TIOCCDTR: 2123 (void)commctl(com, TIOCM_DTR, DMBIC); 2124 break; 2125 /* 2126 * XXX should disallow changing MCR_RTS if CS_RTS_IFLOW is set. The 2127 * changes get undone on the next call to comparam(). 2128 */ 2129 case TIOCMSET: 2130 (void)commctl(com, *(int *)data, DMSET); 2131 break; 2132 case TIOCMBIS: 2133 (void)commctl(com, *(int *)data, DMBIS); 2134 break; 2135 case TIOCMBIC: 2136 (void)commctl(com, *(int *)data, DMBIC); 2137 break; 2138 case TIOCMGET: 2139 *(int *)data = commctl(com, 0, DMGET); 2140 break; 2141 case TIOCMSDTRWAIT: 2142 /* must be root since the wait applies to following logins */ 2143 error = priv_check_cred(ap->a_cred, PRIV_ROOT, 0); 2144 if (error != 0) { 2145 crit_exit(); 2146 lwkt_reltoken(&tty_token); 2147 return (error); 2148 } 2149 com->dtr_wait = *(int *)data * hz / 100; 2150 break; 2151 case TIOCMGDTRWAIT: 2152 *(int *)data = com->dtr_wait * 100 / hz; 2153 break; 2154 case TIOCTIMESTAMP: 2155 com->do_timestamp = TRUE; 2156 *(struct timeval *)data = com->timestamp; 2157 break; 2158 case TIOCDCDTIMESTAMP: 2159 com->do_dcd_timestamp = TRUE; 2160 *(struct timeval *)data = com->dcd_timestamp; 2161 break; 2162 default: 2163 crit_exit(); 2164 error = pps_ioctl(ap->a_cmd, data, &com->pps); 2165 if (error == ENODEV) 2166 error = ENOTTY; 2167 lwkt_reltoken(&tty_token); 2168 return (error); 2169 } 2170 crit_exit(); 2171 lwkt_reltoken(&tty_token); 2172 return (0); 2173 } 2174 2175 static void 2176 siopoll(void *dummy, void *frame) 2177 { 2178 int unit; 2179 2180 lwkt_gettoken(&tty_token); 2181 if (com_events == 0) { 2182 lwkt_reltoken(&tty_token); 2183 return; 2184 } 2185 2186 repeat: 2187 for (unit = 0; unit < sio_numunits; ++unit) { 2188 struct com_s *com; 2189 int incc; 2190 struct tty *tp; 2191 2192 com = com_addr(unit); 2193 if (com == NULL) 2194 continue; 2195 tp = com->tp; 2196 if (tp == NULL || com->gone) { 2197 /* 2198 * Discard any events related to never-opened or 2199 * going-away devices. 2200 */ 2201 com_lock(); 2202 incc = com->iptr - com->ibuf; 2203 com->iptr = com->ibuf; 2204 if (com->state & CS_CHECKMSR) { 2205 incc += LOTS_OF_EVENTS; 2206 com->state &= ~CS_CHECKMSR; 2207 } 2208 com_events -= incc; 2209 com_unlock(); 2210 continue; 2211 } 2212 if (com->iptr != com->ibuf) { 2213 com_lock(); 2214 sioinput(com); 2215 com_unlock(); 2216 } 2217 if (com->state & CS_CHECKMSR) { 2218 u_char delta_modem_status; 2219 2220 com_lock(); 2221 delta_modem_status = com->last_modem_status 2222 ^ com->prev_modem_status; 2223 com->prev_modem_status = com->last_modem_status; 2224 com_events -= LOTS_OF_EVENTS; 2225 com->state &= ~CS_CHECKMSR; 2226 com_unlock(); 2227 if (delta_modem_status & MSR_DCD) 2228 (*linesw[tp->t_line].l_modem) 2229 (tp, com->prev_modem_status & MSR_DCD); 2230 } 2231 if (com->state & CS_ODONE) { 2232 com_lock(); 2233 com_events -= LOTS_OF_EVENTS; 2234 com->state &= ~CS_ODONE; 2235 com_unlock(); 2236 if (!(com->state & CS_BUSY) 2237 && !(com->extra_state & CSE_BUSYCHECK)) { 2238 callout_reset(&com->busy_ch, hz / 100, 2239 siobusycheck, com); 2240 com->extra_state |= CSE_BUSYCHECK; 2241 } 2242 (*linesw[tp->t_line].l_start)(tp); 2243 } 2244 if (com_events == 0) 2245 break; 2246 } 2247 if (com_events >= LOTS_OF_EVENTS) 2248 goto repeat; 2249 lwkt_reltoken(&tty_token); 2250 } 2251 2252 /* 2253 * Called with tty_token held but no com_lock 2254 */ 2255 static int 2256 comparam(struct tty *tp, struct termios *t) 2257 { 2258 u_int cfcr; 2259 int cflag; 2260 struct com_s *com; 2261 u_int divisor; 2262 u_char dlbh; 2263 u_char dlbl; 2264 int unit; 2265 2266 unit = DEV_TO_UNIT(tp->t_dev); 2267 com = com_addr(unit); 2268 if (com == NULL) { 2269 return (ENODEV); 2270 } 2271 2272 /* do historical conversions */ 2273 if (t->c_ispeed == 0) 2274 t->c_ispeed = t->c_ospeed; 2275 2276 /* check requested parameters */ 2277 if (t->c_ospeed == 0) 2278 divisor = 0; 2279 else { 2280 if (t->c_ispeed != t->c_ospeed) 2281 return (EINVAL); 2282 divisor = siodivisor(com->rclk, t->c_ispeed); 2283 if (divisor == 0) 2284 return (EINVAL); 2285 } 2286 2287 /* parameters are OK, convert them to the com struct and the device */ 2288 crit_enter(); 2289 if (divisor == 0) 2290 (void)commctl(com, TIOCM_DTR, DMBIC); /* hang up line */ 2291 else 2292 (void)commctl(com, TIOCM_DTR, DMBIS); 2293 cflag = t->c_cflag; 2294 switch (cflag & CSIZE) { 2295 case CS5: 2296 cfcr = CFCR_5BITS; 2297 break; 2298 case CS6: 2299 cfcr = CFCR_6BITS; 2300 break; 2301 case CS7: 2302 cfcr = CFCR_7BITS; 2303 break; 2304 default: 2305 cfcr = CFCR_8BITS; 2306 break; 2307 } 2308 if (cflag & PARENB) { 2309 cfcr |= CFCR_PENAB; 2310 if (!(cflag & PARODD)) 2311 cfcr |= CFCR_PEVEN; 2312 } 2313 if (cflag & CSTOPB) 2314 cfcr |= CFCR_STOPB; 2315 2316 if (com->hasfifo && divisor != 0) { 2317 /* 2318 * Use a fifo trigger level low enough so that the input 2319 * latency from the fifo is less than about 16 msec and 2320 * the total latency is less than about 30 msec. These 2321 * latencies are reasonable for humans. Serial comms 2322 * protocols shouldn't expect anything better since modem 2323 * latencies are larger. 2324 * 2325 * Interrupts can be held up for long periods of time 2326 * due to inefficiencies in other parts of the kernel, 2327 * certain video cards, etc. Setting the FIFO trigger 2328 * point to MEDH instead of HIGH gives us 694uS of slop 2329 * (8 character times) instead of 173uS (2 character times) 2330 * @ 115200 bps. 2331 */ 2332 com->fifo_image = t->c_ospeed <= 4800 2333 ? FIFO_ENABLE : FIFO_ENABLE | FIFO_RX_MEDH; 2334 #ifdef COM_ESP 2335 /* 2336 * The Hayes ESP card needs the fifo DMA mode bit set 2337 * in compatibility mode. If not, it will interrupt 2338 * for each character received. 2339 */ 2340 if (com->esp) 2341 com->fifo_image |= FIFO_DMA_MODE; 2342 #endif 2343 sio_setreg(com, com_fifo, com->fifo_image); 2344 } 2345 2346 /* 2347 * This returns with interrupts disabled so that we can complete 2348 * the speed change atomically. Keeping interrupts disabled is 2349 * especially important while com_data is hidden. 2350 */ 2351 (void) siosetwater(com, t->c_ispeed); 2352 2353 if (divisor != 0) { 2354 sio_setreg(com, com_cfcr, cfcr | CFCR_DLAB); 2355 /* 2356 * Only set the divisor registers if they would change, 2357 * since on some 16550 incompatibles (UMC8669F), setting 2358 * them while input is arriving them loses sync until 2359 * data stops arriving. 2360 */ 2361 dlbl = divisor & 0xFF; 2362 if (sio_getreg(com, com_dlbl) != dlbl) 2363 sio_setreg(com, com_dlbl, dlbl); 2364 dlbh = divisor >> 8; 2365 if (sio_getreg(com, com_dlbh) != dlbh) 2366 sio_setreg(com, com_dlbh, dlbh); 2367 } 2368 2369 sio_setreg(com, com_cfcr, com->cfcr_image = cfcr); 2370 2371 if (!(tp->t_state & TS_TTSTOP)) 2372 com->state |= CS_TTGO; 2373 2374 if (cflag & CRTS_IFLOW) { 2375 if (com->st16650a) { 2376 sio_setreg(com, com_cfcr, 0xbf); 2377 sio_setreg(com, com_fifo, 2378 sio_getreg(com, com_fifo) | 0x40); 2379 } 2380 com->state |= CS_RTS_IFLOW; 2381 /* 2382 * If CS_RTS_IFLOW just changed from off to on, the change 2383 * needs to be propagated to MCR_RTS. This isn't urgent, 2384 * so do it later by calling comstart() instead of repeating 2385 * a lot of code from comstart() here. 2386 */ 2387 } else if (com->state & CS_RTS_IFLOW) { 2388 com->state &= ~CS_RTS_IFLOW; 2389 /* 2390 * CS_RTS_IFLOW just changed from on to off. Force MCR_RTS 2391 * on here, since comstart() won't do it later. 2392 */ 2393 outb(com->modem_ctl_port, com->mcr_image |= MCR_RTS); 2394 if (com->st16650a) { 2395 sio_setreg(com, com_cfcr, 0xbf); 2396 sio_setreg(com, com_fifo, 2397 sio_getreg(com, com_fifo) & ~0x40); 2398 } 2399 } 2400 2401 2402 /* 2403 * Set up state to handle output flow control. 2404 * XXX - worth handling MDMBUF (DCD) flow control at the lowest level? 2405 * Now has 10+ msec latency, while CTS flow has 50- usec latency. 2406 */ 2407 com->state |= CS_ODEVREADY; 2408 com->state &= ~CS_CTS_OFLOW; 2409 if (cflag & CCTS_OFLOW) { 2410 com->state |= CS_CTS_OFLOW; 2411 if (!(com->last_modem_status & MSR_CTS)) 2412 com->state &= ~CS_ODEVREADY; 2413 if (com->st16650a) { 2414 sio_setreg(com, com_cfcr, 0xbf); 2415 sio_setreg(com, com_fifo, 2416 sio_getreg(com, com_fifo) | 0x80); 2417 } 2418 } else { 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 } 2425 2426 sio_setreg(com, com_cfcr, com->cfcr_image); 2427 2428 /* XXX shouldn't call functions while intrs are disabled. */ 2429 disc_optim(tp, t, com); 2430 /* 2431 * Recover from fiddling with CS_TTGO. We used to call siointr1() 2432 * unconditionally, but that defeated the careful discarding of 2433 * stale input in sioopen(). 2434 */ 2435 if (com->state >= (CS_BUSY | CS_TTGO)) { 2436 com_lock(); 2437 siointr1(com); 2438 com_unlock(); 2439 } 2440 crit_exit(); 2441 comstart(tp); 2442 if (com->ibufold != NULL) { 2443 kfree(com->ibufold, M_DEVBUF); 2444 com->ibufold = NULL; 2445 } 2446 return (0); 2447 } 2448 2449 /* 2450 * called with tty_token held 2451 */ 2452 static int 2453 siosetwater(struct com_s *com, speed_t speed) 2454 { 2455 int cp4ticks; 2456 u_char *ibuf; 2457 int ibufsize; 2458 struct tty *tp; 2459 2460 /* 2461 * Make the buffer size large enough to handle a softtty interrupt 2462 * latency of about 2 ticks without loss of throughput or data 2463 * (about 3 ticks if input flow control is not used or not honoured, 2464 * but a bit less for CS5-CS7 modes). 2465 */ 2466 cp4ticks = speed / 10 / hz * 4; 2467 for (ibufsize = 128; ibufsize < cp4ticks;) 2468 ibufsize <<= 1; 2469 if (ibufsize == com->ibufsize) 2470 return (0); 2471 2472 /* 2473 * Allocate input buffer. The extra factor of 2 in the size is 2474 * to allow for an error byte for each input byte. 2475 */ 2476 ibuf = kmalloc(2 * ibufsize, M_DEVBUF, M_WAITOK | M_ZERO); 2477 2478 /* Initialize non-critical variables. */ 2479 com->ibufold = com->ibuf; 2480 com->ibufsize = ibufsize; 2481 tp = com->tp; 2482 if (tp != NULL) { 2483 tp->t_ififosize = 2 * ibufsize; 2484 tp->t_ispeedwat = (speed_t)-1; 2485 tp->t_ospeedwat = (speed_t)-1; 2486 } 2487 2488 /* 2489 * Read current input buffer. 2490 */ 2491 com_lock(); 2492 if (com->iptr != com->ibuf) 2493 sioinput(com); 2494 2495 /*- 2496 * Initialize critical variables, including input buffer watermarks. 2497 * The external device is asked to stop sending when the buffer 2498 * exactly reaches high water, or when the high level requests it. 2499 * The high level is notified immediately (rather than at a later 2500 * clock tick) when this watermark is reached. 2501 * The buffer size is chosen so the watermark should almost never 2502 * be reached. 2503 * The low watermark is invisibly 0 since the buffer is always 2504 * emptied all at once. 2505 */ 2506 com->iptr = com->ibuf = ibuf; 2507 com->ibufend = ibuf + ibufsize; 2508 com->ierroff = ibufsize; 2509 com->ihighwater = ibuf + 3 * ibufsize / 4; 2510 com_unlock(); 2511 return (0); 2512 } 2513 2514 static void 2515 comstart(struct tty *tp) 2516 { 2517 struct com_s *com; 2518 int unit; 2519 2520 lwkt_gettoken(&tty_token); 2521 unit = DEV_TO_UNIT(tp->t_dev); 2522 com = com_addr(unit); 2523 if (com == NULL) { 2524 lwkt_reltoken(&tty_token); 2525 return; 2526 } 2527 crit_enter(); 2528 com_lock(); 2529 if (tp->t_state & TS_TTSTOP) 2530 com->state &= ~CS_TTGO; 2531 else 2532 com->state |= CS_TTGO; 2533 if (tp->t_state & TS_TBLOCK) { 2534 if (com->mcr_image & MCR_RTS && com->state & CS_RTS_IFLOW) 2535 outb(com->modem_ctl_port, com->mcr_image &= ~MCR_RTS); 2536 } else { 2537 if (!(com->mcr_image & MCR_RTS) && com->iptr < com->ihighwater 2538 && com->state & CS_RTS_IFLOW) 2539 outb(com->modem_ctl_port, com->mcr_image |= MCR_RTS); 2540 } 2541 com_unlock(); 2542 if (tp->t_state & (TS_TIMEOUT | TS_TTSTOP)) { 2543 ttwwakeup(tp); 2544 crit_exit(); 2545 lwkt_reltoken(&tty_token); 2546 return; 2547 } 2548 if (tp->t_outq.c_cc != 0) { 2549 struct lbq *qp; 2550 struct lbq *next; 2551 2552 if (!com->obufs[0].l_queued) { 2553 com->obufs[0].l_tail 2554 = com->obuf1 + q_to_b(&tp->t_outq, com->obuf1, 2555 sizeof com->obuf1); 2556 com->obufs[0].l_next = NULL; 2557 com->obufs[0].l_queued = TRUE; 2558 com_lock(); 2559 if (com->state & CS_BUSY) { 2560 qp = com->obufq.l_next; 2561 while ((next = qp->l_next) != NULL) 2562 qp = next; 2563 qp->l_next = &com->obufs[0]; 2564 } else { 2565 com->obufq.l_head = com->obufs[0].l_head; 2566 com->obufq.l_tail = com->obufs[0].l_tail; 2567 com->obufq.l_next = &com->obufs[0]; 2568 com->state |= CS_BUSY; 2569 } 2570 com_unlock(); 2571 } 2572 if (tp->t_outq.c_cc != 0 && !com->obufs[1].l_queued) { 2573 com->obufs[1].l_tail 2574 = com->obuf2 + q_to_b(&tp->t_outq, com->obuf2, 2575 sizeof com->obuf2); 2576 com->obufs[1].l_next = NULL; 2577 com->obufs[1].l_queued = TRUE; 2578 com_lock(); 2579 if (com->state & CS_BUSY) { 2580 qp = com->obufq.l_next; 2581 while ((next = qp->l_next) != NULL) 2582 qp = next; 2583 qp->l_next = &com->obufs[1]; 2584 } else { 2585 com->obufq.l_head = com->obufs[1].l_head; 2586 com->obufq.l_tail = com->obufs[1].l_tail; 2587 com->obufq.l_next = &com->obufs[1]; 2588 com->state |= CS_BUSY; 2589 } 2590 com_unlock(); 2591 } 2592 tp->t_state |= TS_BUSY; 2593 } 2594 com_lock(); 2595 if (com->state >= (CS_BUSY | CS_TTGO)) 2596 siointr1(com); /* fake interrupt to start output */ 2597 com_unlock(); 2598 ttwwakeup(tp); 2599 crit_exit(); 2600 lwkt_reltoken(&tty_token); 2601 } 2602 2603 static void 2604 comstop(struct tty *tp, int rw) 2605 { 2606 struct com_s *com; 2607 2608 lwkt_gettoken(&tty_token); 2609 com = com_addr(DEV_TO_UNIT(tp->t_dev)); 2610 if (com == NULL || com->gone) { 2611 lwkt_reltoken(&tty_token); 2612 return; 2613 } 2614 com_lock(); 2615 if (rw & FWRITE) { 2616 if (com->hasfifo) 2617 #ifdef COM_ESP 2618 /* XXX avoid h/w bug. */ 2619 if (!com->esp) 2620 #endif 2621 sio_setreg(com, com_fifo, 2622 FIFO_XMT_RST | com->fifo_image); 2623 com->obufs[0].l_queued = FALSE; 2624 com->obufs[1].l_queued = FALSE; 2625 if (com->state & CS_ODONE) 2626 com_events -= LOTS_OF_EVENTS; 2627 com->state &= ~(CS_ODONE | CS_BUSY); 2628 com->tp->t_state &= ~TS_BUSY; 2629 } 2630 if (rw & FREAD) { 2631 if (com->hasfifo) 2632 #ifdef COM_ESP 2633 /* XXX avoid h/w bug. */ 2634 if (!com->esp) 2635 #endif 2636 sio_setreg(com, com_fifo, 2637 FIFO_RCV_RST | com->fifo_image); 2638 com_events -= (com->iptr - com->ibuf); 2639 com->iptr = com->ibuf; 2640 } 2641 com_unlock(); 2642 comstart(tp); 2643 lwkt_reltoken(&tty_token); 2644 } 2645 2646 static int 2647 commctl(struct com_s *com, int bits, int how) 2648 { 2649 int mcr; 2650 int msr; 2651 2652 lwkt_gettoken(&tty_token); 2653 if (how == DMGET) { 2654 bits = TIOCM_LE; /* XXX - always enabled while open */ 2655 mcr = com->mcr_image; 2656 if (mcr & MCR_DTR) 2657 bits |= TIOCM_DTR; 2658 if (mcr & MCR_RTS) 2659 bits |= TIOCM_RTS; 2660 msr = com->prev_modem_status; 2661 if (msr & MSR_CTS) 2662 bits |= TIOCM_CTS; 2663 if (msr & MSR_DCD) 2664 bits |= TIOCM_CD; 2665 if (msr & MSR_DSR) 2666 bits |= TIOCM_DSR; 2667 /* 2668 * XXX - MSR_RI is naturally volatile, and we make MSR_TERI 2669 * more volatile by reading the modem status a lot. Perhaps 2670 * we should latch both bits until the status is read here. 2671 */ 2672 if (msr & (MSR_RI | MSR_TERI)) 2673 bits |= TIOCM_RI; 2674 lwkt_reltoken(&tty_token); 2675 return (bits); 2676 } 2677 mcr = 0; 2678 if (bits & TIOCM_DTR) 2679 mcr |= MCR_DTR; 2680 if (bits & TIOCM_RTS) 2681 mcr |= MCR_RTS; 2682 if (com->gone) { 2683 lwkt_reltoken(&tty_token); 2684 return(0); 2685 } 2686 com_lock(); 2687 switch (how) { 2688 case DMSET: 2689 outb(com->modem_ctl_port, 2690 com->mcr_image = mcr | (com->mcr_image & MCR_IENABLE)); 2691 break; 2692 case DMBIS: 2693 outb(com->modem_ctl_port, com->mcr_image |= mcr); 2694 break; 2695 case DMBIC: 2696 outb(com->modem_ctl_port, com->mcr_image &= ~mcr); 2697 break; 2698 } 2699 com_unlock(); 2700 lwkt_reltoken(&tty_token); 2701 return (0); 2702 } 2703 2704 /* 2705 * NOTE: Must be called with tty_token held 2706 */ 2707 static void 2708 siosettimeout(void) 2709 { 2710 struct com_s *com; 2711 bool_t someopen; 2712 int unit; 2713 2714 ASSERT_LWKT_TOKEN_HELD(&tty_token); 2715 /* 2716 * Set our timeout period to 1 second if no polled devices are open. 2717 * Otherwise set it to max(1/200, 1/hz). 2718 * Enable timeouts iff some device is open. 2719 */ 2720 callout_stop(&sio_timeout_handle); 2721 sio_timeout = hz; 2722 someopen = FALSE; 2723 for (unit = 0; unit < sio_numunits; ++unit) { 2724 com = com_addr(unit); 2725 if (com != NULL && com->tp != NULL 2726 && com->tp->t_state & TS_ISOPEN && !com->gone) { 2727 someopen = TRUE; 2728 if (com->poll || com->poll_output) { 2729 sio_timeout = hz > 200 ? hz / 200 : 1; 2730 break; 2731 } 2732 } 2733 } 2734 if (someopen) { 2735 sio_timeouts_until_log = hz / sio_timeout; 2736 callout_reset(&sio_timeout_handle, sio_timeout, 2737 comwakeup, NULL); 2738 } else { 2739 /* Flush error messages, if any. */ 2740 sio_timeouts_until_log = 1; 2741 comwakeup(NULL); 2742 callout_stop(&sio_timeout_handle); 2743 } 2744 } 2745 2746 /* 2747 * NOTE: Must be called with tty_token held 2748 */ 2749 static void 2750 comwakeup(void *chan) 2751 { 2752 struct com_s *com; 2753 int unit; 2754 2755 /* 2756 * Can be called from a callout too so just get the token 2757 */ 2758 lwkt_gettoken(&tty_token); 2759 callout_reset(&sio_timeout_handle, sio_timeout, comwakeup, NULL); 2760 2761 /* 2762 * Recover from lost output interrupts. 2763 * Poll any lines that don't use interrupts. 2764 */ 2765 for (unit = 0; unit < sio_numunits; ++unit) { 2766 com = com_addr(unit); 2767 if (com != NULL && !com->gone 2768 && (com->state >= (CS_BUSY | CS_TTGO) || com->poll)) { 2769 com_lock(); 2770 siointr1(com); 2771 com_unlock(); 2772 } 2773 } 2774 2775 /* 2776 * Check for and log errors, but not too often. 2777 */ 2778 if (--sio_timeouts_until_log > 0) { 2779 lwkt_reltoken(&tty_token); 2780 return; 2781 } 2782 sio_timeouts_until_log = hz / sio_timeout; 2783 for (unit = 0; unit < sio_numunits; ++unit) { 2784 int errnum; 2785 2786 com = com_addr(unit); 2787 if (com == NULL) 2788 continue; 2789 if (com->gone) 2790 continue; 2791 for (errnum = 0; errnum < CE_NTYPES; ++errnum) { 2792 u_int delta; 2793 u_long total; 2794 2795 com_lock(); 2796 delta = com->delta_error_counts[errnum]; 2797 com->delta_error_counts[errnum] = 0; 2798 com_unlock(); 2799 if (delta == 0) 2800 continue; 2801 total = com->error_counts[errnum] += delta; 2802 log(LOG_ERR, "sio%d: %u more %s%s (total %lu)\n", 2803 unit, delta, error_desc[errnum], 2804 delta == 1 ? "" : "s", total); 2805 } 2806 } 2807 lwkt_reltoken(&tty_token); 2808 } 2809 2810 static void 2811 disc_optim(struct tty *tp, struct termios *t, struct com_s *com) 2812 { 2813 lwkt_gettoken(&tty_token); 2814 if (!(t->c_iflag & (ICRNL | IGNCR | IMAXBEL | INLCR | ISTRIP | IXON)) 2815 && (!(t->c_iflag & BRKINT) || (t->c_iflag & IGNBRK)) 2816 && (!(t->c_iflag & PARMRK) 2817 || (t->c_iflag & (IGNPAR | IGNBRK)) == (IGNPAR | IGNBRK)) 2818 && !(t->c_lflag & (ECHO | ICANON | IEXTEN | ISIG | PENDIN)) 2819 && linesw[tp->t_line].l_rint == ttyinput) 2820 tp->t_state |= TS_CAN_BYPASS_L_RINT; 2821 else 2822 tp->t_state &= ~TS_CAN_BYPASS_L_RINT; 2823 com->hotchar = linesw[tp->t_line].l_hotchar; 2824 lwkt_reltoken(&tty_token); 2825 } 2826 2827 /* 2828 * Following are all routines needed for SIO to act as console 2829 */ 2830 #include <sys/cons.h> 2831 2832 struct siocnstate { 2833 u_char dlbl; 2834 u_char dlbh; 2835 u_char ier; 2836 u_char cfcr; 2837 u_char mcr; 2838 }; 2839 2840 static speed_t siocngetspeed (Port_t, u_long rclk); 2841 #if 0 2842 static void siocnclose (struct siocnstate *sp, Port_t iobase); 2843 #endif 2844 static void siocnopen (struct siocnstate *sp, Port_t iobase, int speed); 2845 static void siocntxwait (Port_t iobase); 2846 2847 static cn_probe_t siocnprobe; 2848 static cn_init_t siocninit; 2849 static cn_init_fini_t siocninit_fini; 2850 static cn_checkc_t siocncheckc; 2851 static cn_getc_t siocngetc; 2852 static cn_putc_t siocnputc; 2853 2854 #if defined(__i386__) || defined(__x86_64__) 2855 CONS_DRIVER(sio, siocnprobe, siocninit, siocninit_fini, 2856 NULL, siocngetc, siocncheckc, siocnputc, NULL); 2857 #endif 2858 2859 /* To get the GDB related variables */ 2860 #if DDB > 0 2861 #include <ddb/ddb.h> 2862 #endif 2863 2864 static void 2865 siocntxwait(Port_t iobase) 2866 { 2867 int timo; 2868 2869 /* 2870 * Wait for any pending transmission to finish. Required to avoid 2871 * the UART lockup bug when the speed is changed, and for normal 2872 * transmits. 2873 */ 2874 timo = 100000; 2875 while ((inb(iobase + com_lsr) & (LSR_TSRE | LSR_TXRDY)) 2876 != (LSR_TSRE | LSR_TXRDY) && --timo != 0) 2877 ; 2878 } 2879 2880 /* 2881 * Read the serial port specified and try to figure out what speed 2882 * it's currently running at. We're assuming the serial port has 2883 * been initialized and is basicly idle. This routine is only intended 2884 * to be run at system startup. 2885 * 2886 * If the value read from the serial port doesn't make sense, return 0. 2887 */ 2888 /* 2889 * NOTE: Must be called with tty_token held 2890 */ 2891 static speed_t 2892 siocngetspeed(Port_t iobase, u_long rclk) 2893 { 2894 u_int divisor; 2895 u_char dlbh; 2896 u_char dlbl; 2897 u_char cfcr; 2898 2899 cfcr = inb(iobase + com_cfcr); 2900 outb(iobase + com_cfcr, CFCR_DLAB | cfcr); 2901 2902 dlbl = inb(iobase + com_dlbl); 2903 dlbh = inb(iobase + com_dlbh); 2904 2905 outb(iobase + com_cfcr, cfcr); 2906 2907 divisor = dlbh << 8 | dlbl; 2908 2909 /* XXX there should be more sanity checking. */ 2910 if (divisor == 0) 2911 return (CONSPEED); 2912 return (rclk / (16UL * divisor)); 2913 } 2914 2915 static void 2916 siocnopen(struct siocnstate *sp, Port_t iobase, int speed) 2917 { 2918 u_int divisor; 2919 u_char dlbh; 2920 u_char dlbl; 2921 2922 /* 2923 * Save all the device control registers except the fifo register 2924 * and set our default ones (cs8 -parenb speed=comdefaultrate). 2925 * We can't save the fifo register since it is read-only. 2926 */ 2927 sp->ier = inb(iobase + com_ier); 2928 outb(iobase + com_ier, 0); /* spltty() doesn't stop siointr() */ 2929 siocntxwait(iobase); 2930 sp->cfcr = inb(iobase + com_cfcr); 2931 outb(iobase + com_cfcr, CFCR_DLAB | CFCR_8BITS); 2932 sp->dlbl = inb(iobase + com_dlbl); 2933 sp->dlbh = inb(iobase + com_dlbh); 2934 /* 2935 * Only set the divisor registers if they would change, since on 2936 * some 16550 incompatibles (Startech), setting them clears the 2937 * data input register. This also reduces the effects of the 2938 * UMC8669F bug. 2939 */ 2940 divisor = siodivisor(comdefaultrclk, speed); 2941 dlbl = divisor & 0xFF; 2942 if (sp->dlbl != dlbl) 2943 outb(iobase + com_dlbl, dlbl); 2944 dlbh = divisor >> 8; 2945 if (sp->dlbh != dlbh) 2946 outb(iobase + com_dlbh, dlbh); 2947 outb(iobase + com_cfcr, CFCR_8BITS); 2948 sp->mcr = inb(iobase + com_mcr); 2949 /* 2950 * We don't want interrupts, but must be careful not to "disable" 2951 * them by clearing the MCR_IENABLE bit, since that might cause 2952 * an interrupt by floating the IRQ line. 2953 */ 2954 outb(iobase + com_mcr, (sp->mcr & MCR_IENABLE) | MCR_DTR | MCR_RTS); 2955 } 2956 2957 #if 0 2958 static void 2959 siocnclose(struct siocnstate *sp, Port_t iobase) 2960 { 2961 /* 2962 * Restore the device control registers. 2963 */ 2964 siocntxwait(iobase); 2965 outb(iobase + com_cfcr, CFCR_DLAB | CFCR_8BITS); 2966 if (sp->dlbl != inb(iobase + com_dlbl)) 2967 outb(iobase + com_dlbl, sp->dlbl); 2968 if (sp->dlbh != inb(iobase + com_dlbh)) 2969 outb(iobase + com_dlbh, sp->dlbh); 2970 outb(iobase + com_cfcr, sp->cfcr); 2971 /* 2972 * XXX damp oscillations of MCR_DTR and MCR_RTS by not restoring them. 2973 */ 2974 outb(iobase + com_mcr, sp->mcr | MCR_DTR | MCR_RTS); 2975 outb(iobase + com_ier, sp->ier); 2976 } 2977 #endif 2978 2979 static void 2980 siocnprobe(struct consdev *cp) 2981 { 2982 speed_t boot_speed; 2983 u_char cfcr; 2984 u_int divisor; 2985 int unit; 2986 struct siocnstate sp; 2987 2988 /* 2989 * Find our first enabled console, if any. If it is a high-level 2990 * console device, then initialize it and return successfully. 2991 * If it is a low-level console device, then initialize it and 2992 * return unsuccessfully. It must be initialized in both cases 2993 * for early use by console drivers and debuggers. Initializing 2994 * the hardware is not necessary in all cases, since the i/o 2995 * routines initialize it on the fly, but it is necessary if 2996 * input might arrive while the hardware is switched back to an 2997 * uninitialized state. We can't handle multiple console devices 2998 * yet because our low-level routines don't take a device arg. 2999 * We trust the user to set the console flags properly so that we 3000 * don't need to probe. 3001 */ 3002 cp->cn_pri = CN_DEAD; 3003 3004 for (unit = 0; unit < 16; unit++) { /* XXX need to know how many */ 3005 int flags; 3006 int disabled; 3007 if (resource_int_value("sio", unit, "disabled", &disabled) == 0) { 3008 if (disabled) 3009 continue; 3010 } 3011 if (resource_int_value("sio", unit, "flags", &flags)) 3012 continue; 3013 if (COM_CONSOLE(flags) || COM_DEBUGGER(flags)) { 3014 int port; 3015 Port_t iobase; 3016 3017 if (resource_int_value("sio", unit, "port", &port)) 3018 continue; 3019 iobase = port; 3020 crit_enter(); 3021 if (boothowto & RB_SERIAL) { 3022 boot_speed = 3023 siocngetspeed(iobase, comdefaultrclk); 3024 if (boot_speed) 3025 comdefaultrate = boot_speed; 3026 } 3027 3028 /* 3029 * Initialize the divisor latch. We can't rely on 3030 * siocnopen() to do this the first time, since it 3031 * avoids writing to the latch if the latch appears 3032 * to have the correct value. Also, if we didn't 3033 * just read the speed from the hardware, then we 3034 * need to set the speed in hardware so that 3035 * switching it later is null. 3036 */ 3037 com_lock(); 3038 cfcr = inb(iobase + com_cfcr); 3039 outb(iobase + com_cfcr, CFCR_DLAB | cfcr); 3040 divisor = siodivisor(comdefaultrclk, comdefaultrate); 3041 outb(iobase + com_dlbl, divisor & 0xff); 3042 outb(iobase + com_dlbh, divisor >> 8); 3043 outb(iobase + com_cfcr, cfcr); 3044 3045 siocnopen(&sp, iobase, comdefaultrate); 3046 com_unlock(); 3047 3048 crit_exit(); 3049 if (COM_CONSOLE(flags) && !COM_LLCONSOLE(flags)) { 3050 cp->cn_probegood = 1; 3051 cp->cn_private = (void *)(intptr_t)unit; 3052 cp->cn_pri = COM_FORCECONSOLE(flags) 3053 || boothowto & RB_SERIAL 3054 ? CN_REMOTE : CN_NORMAL; 3055 siocniobase = iobase; 3056 siocnunit = unit; 3057 } 3058 if (COM_DEBUGGER(flags) && gdb_tab == NULL) { 3059 kprintf("sio%d: gdb debugging port\n", unit); 3060 siogdbiobase = iobase; 3061 siogdbunit = unit; 3062 #if DDB > 0 3063 cp->cn_gdbprivate = (void *)(intptr_t)unit; 3064 gdb_tab = cp; 3065 #endif 3066 } 3067 } 3068 } 3069 #if defined(__i386__) || defined(__x86_64__) 3070 #if DDB > 0 3071 /* 3072 * XXX Ugly Compatability. 3073 * If no gdb port has been specified, set it to be the console 3074 * as some configuration files don't specify the gdb port. 3075 */ 3076 if (gdb_tab == NULL && (boothowto & RB_GDB)) { 3077 kprintf("Warning: no GDB port specified. Defaulting to sio%d.\n", 3078 siocnunit); 3079 kprintf("Set flag 0x80 on desired GDB port in your\n"); 3080 kprintf("configuration file (currently sio only).\n"); 3081 siogdbiobase = siocniobase; 3082 siogdbunit = siocnunit; 3083 cp->cn_gdbprivate = (void *)(intptr_t)siocnunit; 3084 gdb_tab = cp; 3085 } 3086 #endif 3087 #endif 3088 } 3089 3090 static void 3091 siocninit(struct consdev *cp) 3092 { 3093 comconsole = (int)(intptr_t)cp->cn_private; 3094 } 3095 3096 static void 3097 siocninit_fini(struct consdev *cp) 3098 { 3099 cdev_t dev; 3100 int unit; 3101 3102 if (cp->cn_probegood) { 3103 unit = (int)(intptr_t)cp->cn_private; 3104 /* 3105 * Call devfs_find_device_by_name on ttydX to find the correct device, 3106 * as it should have been created already at this point by the 3107 * attach routine. 3108 * If it isn't found, the serial port was not attached at all and we 3109 * shouldn't be here, so assert this case. 3110 */ 3111 dev = devfs_find_device_by_name("ttyd%r", unit); 3112 3113 KKASSERT(dev != NULL); 3114 cp->cn_dev = dev; 3115 } 3116 } 3117 3118 static int 3119 siocncheckc(void *private) 3120 { 3121 int c; 3122 int unit = (int)(intptr_t)private; 3123 Port_t iobase; 3124 #if 0 3125 struct siocnstate sp; 3126 #endif 3127 3128 if (unit == siogdbunit) 3129 iobase = siogdbiobase; 3130 else 3131 iobase = siocniobase; 3132 com_lock(); 3133 crit_enter(); 3134 #if 0 3135 siocnopen(&sp, iobase, comdefaultrate); 3136 #endif 3137 if (inb(iobase + com_lsr) & LSR_RXRDY) 3138 c = inb(iobase + com_data); 3139 else 3140 c = -1; 3141 #if 0 3142 siocnclose(&sp, iobase); 3143 #endif 3144 crit_exit(); 3145 com_unlock(); 3146 return (c); 3147 } 3148 3149 3150 int 3151 siocngetc(void *private) 3152 { 3153 int c; 3154 int unit = (int)(intptr_t)private; 3155 Port_t iobase; 3156 #if 0 3157 struct siocnstate sp; 3158 #endif 3159 3160 if (unit == siogdbunit) 3161 iobase = siogdbiobase; 3162 else 3163 iobase = siocniobase; 3164 com_lock(); 3165 crit_enter(); 3166 #if 0 3167 siocnopen(&sp, iobase, comdefaultrate); 3168 #endif 3169 while (!(inb(iobase + com_lsr) & LSR_RXRDY)) 3170 ; 3171 c = inb(iobase + com_data); 3172 #if 0 3173 siocnclose(&sp, iobase); 3174 #endif 3175 crit_exit(); 3176 com_unlock(); 3177 return (c); 3178 } 3179 3180 void 3181 siocnputc(void *private, int c) 3182 { 3183 int unit = (int)(intptr_t)private; 3184 #if 0 3185 struct siocnstate sp; 3186 #endif 3187 Port_t iobase; 3188 3189 if (unit == siogdbunit) 3190 iobase = siogdbiobase; 3191 else 3192 iobase = siocniobase; 3193 com_lock(); 3194 crit_enter(); 3195 #if 0 3196 siocnopen(&sp, iobase, comdefaultrate); 3197 #endif 3198 siocntxwait(iobase); 3199 outb(iobase + com_data, c); 3200 #if 0 3201 siocnclose(&sp, iobase); 3202 #endif 3203 crit_exit(); 3204 com_unlock(); 3205 } 3206 3207 DRIVER_MODULE(sio, isa, sio_isa_driver, sio_devclass, NULL, NULL); 3208 DRIVER_MODULE(sio, acpi, sio_isa_driver, sio_devclass, NULL, NULL); 3209 #if NPCI > 0 3210 DRIVER_MODULE(sio, pci, sio_pci_driver, sio_devclass, NULL, NULL); 3211 #endif 3212 #if NPUC > 0 3213 DRIVER_MODULE(sio, puc, sio_puc_driver, sio_devclass, NULL, NULL); 3214 #endif 3215