1 /*- 2 * (MPSAFE) 3 * 4 * Copyright (c) 1991 The Regents of the University of California. 5 * All rights reserved. 6 * 7 * Redistribution and use in source and binary forms, with or without 8 * modification, are permitted provided that the following conditions 9 * are met: 10 * 1. Redistributions of source code must retain the above copyright 11 * notice, this list of conditions and the following disclaimer. 12 * 2. Redistributions in binary form must reproduce the above copyright 13 * notice, this list of conditions and the following disclaimer in the 14 * documentation and/or other materials provided with the distribution. 15 * 3. Neither the name of the University nor the names of its contributors 16 * may be used to endorse or promote products derived from this software 17 * without specific prior written permission. 18 * 19 * THIS SOFTWARE IS PROVIDED BY THE REGENTS AND CONTRIBUTORS ``AS IS'' AND 20 * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE 21 * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE 22 * ARE DISCLAIMED. IN NO EVENT SHALL THE REGENTS OR CONTRIBUTORS BE LIABLE 23 * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL 24 * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS 25 * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) 26 * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT 27 * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY 28 * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF 29 * SUCH DAMAGE. 30 * 31 * $FreeBSD: src/sys/isa/sio.c,v 1.291.2.35 2003/05/18 08:51:15 murray Exp $ 32 * from: @(#)com.c 7.5 (Berkeley) 5/16/91 33 * from: i386/isa sio.c,v 1.234 34 */ 35 36 #include "opt_comconsole.h" 37 #include "opt_ddb.h" 38 #include "opt_sio.h" 39 #include "use_pci.h" 40 #include "use_puc.h" 41 42 /* 43 * Serial driver, based on 386BSD-0.1 com driver. 44 * Mostly rewritten to use pseudo-DMA. 45 * Works for National Semiconductor NS8250-NS16550AF UARTs. 46 * COM driver, based on HP dca driver. 47 * 48 * Changes for PC-Card integration: 49 * - Added PC-Card driver table and handlers 50 */ 51 #include <sys/param.h> 52 #include <sys/systm.h> 53 #include <sys/reboot.h> 54 #include <sys/malloc.h> 55 #include <sys/tty.h> 56 #include <sys/proc.h> 57 #include <sys/priv.h> 58 #include <sys/module.h> 59 #include <sys/conf.h> 60 #include <sys/dkstat.h> 61 #include <sys/fcntl.h> 62 #include <sys/interrupt.h> 63 #include <sys/kernel.h> 64 #include <sys/syslog.h> 65 #include <sys/sysctl.h> 66 #include <sys/bus.h> 67 #include <sys/rman.h> 68 #include <sys/timepps.h> 69 #include <sys/thread2.h> 70 #include <sys/devfs.h> 71 #include <sys/consio.h> 72 73 #include <machine/limits.h> 74 75 #include <bus/isa/isareg.h> 76 #include <bus/isa/isavar.h> 77 #if NPCI > 0 78 #include <bus/pci/pcireg.h> 79 #include <bus/pci/pcivar.h> 80 #endif 81 #if NPUC > 0 82 #include <dev/misc/puc/pucvar.h> 83 #endif 84 #include <machine/lock.h> 85 86 #include <machine/clock.h> 87 88 #include "sioreg.h" 89 #include "sio_private.h" 90 91 #ifdef COM_ESP 92 #include "../ic_layer/esp.h" 93 #endif 94 95 #define LOTS_OF_EVENTS 64 /* helps separate urgent events from input */ 96 97 #define CALLOUT_MASK 0x80 98 #define CONTROL_MASK 0x60 99 #define CONTROL_INIT_STATE 0x20 100 #define CONTROL_LOCK_STATE 0x40 101 #define DEV_TO_UNIT(dev) (MINOR_TO_UNIT(minor(dev))) 102 #define MINOR_TO_UNIT(mynor) ((((mynor) & ~0xffffU) >> (8 + 3)) \ 103 | ((mynor) & 0x1f)) 104 #define UNIT_TO_MINOR(unit) ((((unit) & ~0x1fU) << (8 + 3)) \ 105 | ((unit) & 0x1f)) 106 107 #define com_scr 7 /* scratch register for 16450-16550 (R/W) */ 108 109 #define sio_getreg(com, off) \ 110 (bus_space_read_1((com)->bst, (com)->bsh, (off))) 111 #define sio_setreg(com, off, value) \ 112 (bus_space_write_1((com)->bst, (com)->bsh, (off), (value))) 113 114 /* 115 * com state bits. 116 * (CS_BUSY | CS_TTGO) and (CS_BUSY | CS_TTGO | CS_ODEVREADY) must be higher 117 * than the other bits so that they can be tested as a group without masking 118 * off the low bits. 119 * 120 * The following com and tty flags correspond closely: 121 * CS_BUSY = TS_BUSY (maintained by comstart(), siopoll() and 122 * comstop()) 123 * CS_TTGO = ~TS_TTSTOP (maintained by comparam() and comstart()) 124 * CS_CTS_OFLOW = CCTS_OFLOW (maintained by comparam()) 125 * CS_RTS_IFLOW = CRTS_IFLOW (maintained by comparam()) 126 * TS_FLUSH is not used. 127 * XXX I think TIOCSETA doesn't clear TS_TTSTOP when it clears IXON. 128 * XXX CS_*FLOW should be CF_*FLOW in com->flags (control flags not state). 129 */ 130 #define CS_BUSY 0x80 /* output in progress */ 131 #define CS_TTGO 0x40 /* output not stopped by XOFF */ 132 #define CS_ODEVREADY 0x20 /* external device h/w ready (CTS) */ 133 #define CS_CHECKMSR 1 /* check of MSR scheduled */ 134 #define CS_CTS_OFLOW 2 /* use CTS output flow control */ 135 #define CS_DTR_OFF 0x10 /* DTR held off */ 136 #define CS_ODONE 4 /* output completed */ 137 #define CS_RTS_IFLOW 8 /* use RTS input flow control */ 138 #define CSE_BUSYCHECK 1 /* siobusycheck() scheduled */ 139 140 static char const * const error_desc[] = { 141 #define CE_OVERRUN 0 142 "silo overflow", 143 #define CE_INTERRUPT_BUF_OVERFLOW 1 144 "interrupt-level buffer overflow", 145 #define CE_TTY_BUF_OVERFLOW 2 146 "tty-level buffer overflow", 147 }; 148 149 #ifdef COM_ESP 150 static int espattach (struct com_s *com, Port_t esp_port); 151 #endif 152 static int sio_isa_attach (device_t dev); 153 154 static timeout_t siobusycheck; 155 static u_int siodivisor (u_long rclk, speed_t speed); 156 static timeout_t siodtrwakeup; 157 static void comhardclose (struct com_s *com); 158 static void sioinput (struct com_s *com); 159 static void siointr1 (struct com_s *com); 160 static void siointr (void *arg); 161 static int commctl (struct com_s *com, int bits, int how); 162 static int comparam (struct tty *tp, struct termios *t); 163 static inthand2_t siopoll; 164 static int sio_isa_probe (device_t dev); 165 static void siosettimeout (void); 166 static int siosetwater (struct com_s *com, speed_t speed); 167 static void comstart (struct tty *tp); 168 static void comstop (struct tty *tp, int rw); 169 static timeout_t comwakeup; 170 static void disc_optim (struct tty *tp, struct termios *t, 171 struct com_s *com); 172 173 #if NPCI > 0 174 static int sio_pci_attach (device_t dev); 175 static void sio_pci_kludge_unit (device_t dev); 176 static int sio_pci_probe (device_t dev); 177 #endif /* NPCI > 0 */ 178 179 #if NPUC > 0 180 static int sio_puc_attach (device_t dev); 181 static int sio_puc_probe (device_t dev); 182 #endif /* NPUC > 0 */ 183 184 static char driver_name[] = "sio"; 185 186 /* table and macro for fast conversion from a unit number to its com struct */ 187 devclass_t sio_devclass; 188 #define com_addr(unit) ((struct com_s *) \ 189 devclass_get_softc(sio_devclass, unit)) 190 191 static device_method_t sio_isa_methods[] = { 192 /* Device interface */ 193 DEVMETHOD(device_probe, sio_isa_probe), 194 DEVMETHOD(device_attach, sio_isa_attach), 195 196 DEVMETHOD_END 197 }; 198 199 static driver_t sio_isa_driver = { 200 driver_name, 201 sio_isa_methods, 202 sizeof(struct com_s), 203 }; 204 205 #if NPCI > 0 206 static device_method_t sio_pci_methods[] = { 207 /* Device interface */ 208 DEVMETHOD(device_probe, sio_pci_probe), 209 DEVMETHOD(device_attach, sio_pci_attach), 210 211 DEVMETHOD_END 212 }; 213 214 static driver_t sio_pci_driver = { 215 driver_name, 216 sio_pci_methods, 217 sizeof(struct com_s), 218 }; 219 #endif /* NPCI > 0 */ 220 221 #if NPUC > 0 222 static device_method_t sio_puc_methods[] = { 223 /* Device interface */ 224 DEVMETHOD(device_probe, sio_puc_probe), 225 DEVMETHOD(device_attach, sio_puc_attach), 226 227 DEVMETHOD_END 228 }; 229 230 static driver_t sio_puc_driver = { 231 driver_name, 232 sio_puc_methods, 233 sizeof(struct com_s), 234 }; 235 #endif /* NPUC > 0 */ 236 237 static d_open_t sioopen; 238 static d_close_t sioclose; 239 static d_read_t sioread; 240 static d_write_t siowrite; 241 static d_ioctl_t sioioctl; 242 243 static struct dev_ops sio_ops = { 244 { driver_name, 0, D_TTY }, 245 .d_open = sioopen, 246 .d_close = sioclose, 247 .d_read = sioread, 248 .d_write = siowrite, 249 .d_ioctl = sioioctl, 250 .d_kqfilter = ttykqfilter, 251 .d_revoke = ttyrevoke 252 }; 253 254 int comconsole = -1; 255 static volatile speed_t comdefaultrate = CONSPEED; 256 static u_long comdefaultrclk = DEFAULT_RCLK; 257 SYSCTL_ULONG(_machdep, OID_AUTO, conrclk, CTLFLAG_RW, &comdefaultrclk, 0, ""); 258 static u_int com_events; /* input chars + weighted output completions */ 259 static Port_t siocniobase; 260 static int siocnunit; 261 static Port_t siogdbiobase; 262 static int siogdbunit = -1; 263 static bool_t sio_registered; 264 static int sio_timeout; 265 static int sio_timeouts_until_log; 266 static struct callout sio_timeout_handle; 267 static int sio_numunits; 268 269 #ifdef COM_ESP 270 /* XXX configure this properly. */ 271 static Port_t likely_com_ports[] = { 0x3f8, 0x2f8, 0x3e8, 0x2e8, }; 272 static Port_t likely_esp_ports[] = { 0x140, 0x180, 0x280, 0 }; 273 #endif 274 275 /* 276 * handle sysctl read/write requests for console speed 277 * 278 * In addition to setting comdefaultrate for I/O through /dev/console, 279 * also set the initial and lock values for the /dev/ttyXX device 280 * if there is one associated with the console. Finally, if the /dev/tty 281 * device has already been open, change the speed on the open running port 282 * itself. 283 */ 284 285 static int 286 sysctl_machdep_comdefaultrate(SYSCTL_HANDLER_ARGS) 287 { 288 int error; 289 speed_t newspeed; 290 struct com_s *com; 291 struct tty *tp; 292 293 lwkt_gettoken(&tty_token); 294 newspeed = comdefaultrate; 295 296 error = sysctl_handle_opaque(oidp, &newspeed, sizeof newspeed, req); 297 if (error || !req->newptr) { 298 lwkt_reltoken(&tty_token); 299 return (error); 300 } 301 302 comdefaultrate = newspeed; 303 304 if (comconsole < 0) { /* serial console not selected? */ 305 lwkt_reltoken(&tty_token); 306 return (0); 307 } 308 309 com = com_addr(comconsole); 310 if (com == NULL) { 311 lwkt_reltoken(&tty_token); 312 return (ENXIO); 313 } 314 315 /* 316 * set the initial and lock rates for /dev/ttydXX and /dev/cuaXX 317 * (note, the lock rates really are boolean -- if non-zero, disallow 318 * speed changes) 319 */ 320 com->it_in.c_ispeed = com->it_in.c_ospeed = 321 com->lt_in.c_ispeed = com->lt_in.c_ospeed = 322 com->it_out.c_ispeed = com->it_out.c_ospeed = 323 com->lt_out.c_ispeed = com->lt_out.c_ospeed = comdefaultrate; 324 325 /* 326 * if we're open, change the running rate too 327 */ 328 tp = com->tp; 329 if (tp && (tp->t_state & TS_ISOPEN)) { 330 tp->t_termios.c_ispeed = 331 tp->t_termios.c_ospeed = comdefaultrate; 332 crit_enter(); 333 error = comparam(tp, &tp->t_termios); 334 crit_exit(); 335 } 336 lwkt_reltoken(&tty_token); 337 return error; 338 } 339 340 SYSCTL_PROC(_machdep, OID_AUTO, conspeed, CTLTYPE_INT | CTLFLAG_RW, 341 0, 0, sysctl_machdep_comdefaultrate, "I", ""); 342 343 #if NPCI > 0 344 struct pci_ids { 345 u_int32_t type; 346 const char *desc; 347 int rid; 348 }; 349 350 static struct pci_ids pci_ids[] = { 351 { 0x100812b9, "3COM PCI FaxModem", 0x10 }, 352 { 0x2000131f, "CyberSerial (1-port) 16550", 0x10 }, 353 { 0x01101407, "Koutech IOFLEX-2S PCI Dual Port Serial", 0x10 }, 354 { 0x01111407, "Koutech IOFLEX-2S PCI Dual Port Serial", 0x10 }, 355 { 0x048011c1, "Lucent kermit based PCI Modem", 0x14 }, 356 { 0x95211415, "Oxford Semiconductor PCI Dual Port Serial", 0x10 }, 357 { 0x7101135e, "SeaLevel Ultra 530.PCI Single Port Serial", 0x18 }, 358 { 0x0000151f, "SmartLink 5634PCV SurfRider", 0x10 }, 359 { 0x98459710, "Netmos Nm9845 PCI Bridge with Dual UART", 0x10 }, 360 { 0x8c3d8086, "Intel Lynx Point KT Controller", 0x10 }, 361 { 0x9c3d8086, "Intel Lynx Point-LP HECI KT", 0x10 }, 362 { 0x8cbd8086, "Intel Wildcat Point KT Controller", 0x10 }, 363 { 0x9cbd8086, "Intel Wildcat Point-LP KT Controller", 0x10 }, 364 { 0x00000000, NULL, 0 } 365 }; 366 367 static int 368 sio_pci_attach(device_t dev) 369 { 370 u_int32_t type; 371 struct pci_ids *id; 372 373 type = pci_get_devid(dev); 374 id = pci_ids; 375 while (id->type && id->type != type) 376 id++; 377 if (id->desc == NULL) 378 return (ENXIO); 379 sio_pci_kludge_unit(dev); 380 return (sioattach(dev, id->rid, 0UL)); 381 } 382 383 /* 384 * Don't cut and paste this to other drivers. It is a horrible kludge 385 * which will fail to work and also be unnecessary in future versions. 386 */ 387 static void 388 sio_pci_kludge_unit(device_t dev) 389 { 390 devclass_t dc; 391 int err; 392 int start; 393 int unit; 394 395 unit = 0; 396 start = 0; 397 while (resource_int_value("sio", unit, "port", &start) == 0 && 398 start > 0) 399 unit++; 400 if (device_get_unit(dev) < unit) { 401 dc = device_get_devclass(dev); 402 while (devclass_get_device(dc, unit)) 403 unit++; 404 device_printf(dev, "moving to sio%d\n", unit); 405 err = device_set_unit(dev, unit); /* EVIL DO NOT COPY */ 406 if (err) 407 device_printf(dev, "error moving device %d\n", err); 408 } 409 } 410 411 static int 412 sio_pci_probe(device_t dev) 413 { 414 u_int32_t type; 415 struct pci_ids *id; 416 417 type = pci_get_devid(dev); 418 id = pci_ids; 419 while (id->type && id->type != type) 420 id++; 421 if (id->desc == NULL) 422 return (ENXIO); 423 device_set_desc(dev, id->desc); 424 return (sioprobe(dev, id->rid, 0UL)); 425 } 426 #endif /* NPCI > 0 */ 427 428 #if NPUC > 0 429 static int 430 sio_puc_attach(device_t dev) 431 { 432 uintptr_t rclk; 433 434 if (BUS_READ_IVAR(device_get_parent(dev), dev, PUC_IVAR_FREQ, 435 &rclk) != 0) 436 rclk = DEFAULT_RCLK; 437 return (sioattach(dev, 0, rclk)); 438 } 439 440 static int 441 sio_puc_probe(device_t dev) 442 { 443 uintptr_t rclk; 444 445 if (BUS_READ_IVAR(device_get_parent(dev), dev, PUC_IVAR_FREQ, 446 &rclk) != 0) 447 rclk = DEFAULT_RCLK; 448 return (sioprobe(dev, 0, rclk)); 449 } 450 #endif /* NPUC */ 451 452 static struct isa_pnp_id sio_ids[] = { 453 {0x0005d041, "Standard PC COM port"}, /* PNP0500 */ 454 {0x0105d041, "16550A-compatible COM port"}, /* PNP0501 */ 455 {0x0205d041, "Multiport serial device (non-intelligent 16550)"}, /* PNP0502 */ 456 {0x1005d041, "Generic IRDA-compatible device"}, /* PNP0510 */ 457 {0x1105d041, "Generic IRDA-compatible device"}, /* PNP0511 */ 458 /* Devices that do not have a compatid */ 459 {0x12206804, NULL}, /* ACH2012 - 5634BTS 56K Video Ready Modem */ 460 {0x7602a904, NULL}, /* AEI0276 - 56K v.90 Fax Modem (LKT) */ 461 {0x00007905, NULL}, /* AKY0000 - 56K Plug&Play Modem */ 462 {0x21107905, NULL}, /* AKY1021 - 56K Plug&Play Modem */ 463 {0x01405407, NULL}, /* AZT4001 - AZT3000 PnP SOUND DEVICE, MODEM */ 464 {0x56039008, NULL}, /* BDP0356 - Best Data 56x2 */ 465 {0x56159008, NULL}, /* BDP1556 - B.D. Smart One 56SPS,Voice Modem*/ 466 {0x36339008, NULL}, /* BDP3336 - Best Data Prods. 336F */ 467 {0x0014490a, NULL}, /* BRI1400 - Boca 33.6 PnP */ 468 {0x0015490a, NULL}, /* BRI1500 - Internal Fax Data */ 469 {0x0034490a, NULL}, /* BRI3400 - Internal ACF Modem */ 470 {0x0094490a, NULL}, /* BRI9400 - Boca K56Flex PnP */ 471 {0x00b4490a, NULL}, /* BRIB400 - Boca 56k PnP */ 472 {0x0030320d, NULL}, /* CIR3000 - Cirrus Logic V43 */ 473 {0x0100440e, NULL}, /* CRD0001 - Cardinal MVP288IV ? */ 474 {0x01308c0e, NULL}, /* CTL3001 - Creative Labs Phoneblaster */ 475 {0x36033610, NULL}, /* DAV0336 - DAVICOM 336PNP MODEM */ 476 {0x01009416, NULL}, /* ETT0001 - E-Tech Bullet 33k6 PnP */ 477 {0x0000aa1a, NULL}, /* FUJ0000 - FUJITSU Modem 33600 PNP/I2 */ 478 {0x1200c31e, NULL}, /* GVC0012 - VF1128HV-R9 (win modem?) */ 479 {0x0303c31e, NULL}, /* GVC0303 - MaxTech 33.6 PnP D/F/V */ 480 {0x0505c31e, NULL}, /* GVC0505 - GVC 56k Faxmodem */ 481 {0x0116c31e, NULL}, /* GVC1601 - Rockwell V.34 Plug & Play Modem */ 482 {0x0050c31e, NULL}, /* GVC5000 - some GVC modem */ 483 {0x3800f91e, NULL}, /* GWY0038 - Telepath with v.90 */ 484 {0x9062f91e, NULL}, /* GWY6290 - Telepath with x2 Technology */ 485 {0x8100e425, NULL}, /* IOD0081 - I-O DATA DEVICE,INC. IFML-560 */ 486 {0x21002534, NULL}, /* MAE0021 - Jetstream Int V.90 56k Voice Series 2*/ 487 {0x0000f435, NULL}, /* MOT0000 - Motorola ModemSURFR 33.6 Intern */ 488 {0x5015f435, NULL}, /* MOT1550 - Motorola ModemSURFR 56K Modem */ 489 {0xf015f435, NULL}, /* MOT15F0 - Motorola VoiceSURFR 56K Modem */ 490 {0x6045f435, NULL}, /* MOT4560 - Motorola ? */ 491 {0x61e7a338, NULL}, /* NECE761 - 33.6Modem */ 492 {0x08804f3f, NULL}, /* OZO8008 - Zoom (33.6k Modem) */ 493 {0x0f804f3f, NULL}, /* OZO800f - Zoom 2812 (56k Modem) */ 494 {0x39804f3f, NULL}, /* OZO8039 - Zoom 56k flex */ 495 {0x00914f3f, NULL}, /* OZO9100 - Zoom 2919 (K56 Faxmodem) */ 496 {0x3024a341, NULL}, /* PMC2430 - Pace 56 Voice Internal Modem */ 497 {0x1000eb49, NULL}, /* ROK0010 - Rockwell ? */ 498 {0x1200b23d, NULL}, /* RSS0012 - OMRON ME5614ISA */ 499 {0x5002734a, NULL}, /* RSS0250 - 5614Jx3(G) Internal Modem */ 500 {0x6202734a, NULL}, /* RSS0262 - 5614Jx3[G] V90+K56Flex Modem */ 501 {0x1010104d, NULL}, /* SHP1010 - Rockwell 33600bps Modem */ 502 {0xc100ad4d, NULL}, /* SMM00C1 - Leopard 56k PnP */ 503 {0x9012b04e, NULL}, /* SUP1290 - Supra ? */ 504 {0x1013b04e, NULL}, /* SUP1310 - SupraExpress 336i PnP */ 505 {0x8013b04e, NULL}, /* SUP1380 - SupraExpress 288i PnP Voice */ 506 {0x8113b04e, NULL}, /* SUP1381 - SupraExpress 336i PnP Voice */ 507 {0x5016b04e, NULL}, /* SUP1650 - Supra 336i Sp Intl */ 508 {0x7016b04e, NULL}, /* SUP1670 - Supra 336i V+ Intl */ 509 {0x7420b04e, NULL}, /* SUP2070 - Supra ? */ 510 {0x8020b04e, NULL}, /* SUP2080 - Supra ? */ 511 {0x8420b04e, NULL}, /* SUP2084 - SupraExpress 56i PnP */ 512 {0x7121b04e, NULL}, /* SUP2171 - SupraExpress 56i Sp? */ 513 {0x8024b04e, NULL}, /* SUP2480 - Supra ? */ 514 {0x01007256, NULL}, /* USR0001 - U.S. Robotics Inc., Sportster W */ 515 {0x02007256, NULL}, /* USR0002 - U.S. Robotics Inc. Sportster 33. */ 516 {0x04007256, NULL}, /* USR0004 - USR Sportster 14.4k */ 517 {0x06007256, NULL}, /* USR0006 - USR Sportster 33.6k */ 518 {0x11007256, NULL}, /* USR0011 - USR ? */ 519 {0x01017256, NULL}, /* USR0101 - USR ? */ 520 {0x30207256, NULL}, /* USR2030 - U.S.Robotics Inc. Sportster 560 */ 521 {0x50207256, NULL}, /* USR2050 - U.S.Robotics Inc. Sportster 33. */ 522 {0x70207256, NULL}, /* USR2070 - U.S.Robotics Inc. Sportster 560 */ 523 {0x30307256, NULL}, /* USR3030 - U.S. Robotics 56K FAX INT */ 524 {0x31307256, NULL}, /* USR3031 - U.S. Robotics 56K FAX INT */ 525 {0x50307256, NULL}, /* USR3050 - U.S. Robotics 56K FAX INT */ 526 {0x70307256, NULL}, /* USR3070 - U.S. Robotics 56K Voice INT */ 527 {0x90307256, NULL}, /* USR3090 - USR ? */ 528 {0x70917256, NULL}, /* USR9170 - U.S. Robotics 56K FAX INT */ 529 {0x90917256, NULL}, /* USR9190 - USR 56k Voice INT */ 530 {0x0300695c, NULL}, /* WCI0003 - Fax/Voice/Modem/Speakphone/Asvd */ 531 {0x01a0896a, NULL}, /* ZTIA001 - Zoom Internal V90 Faxmodem */ 532 {0x61f7896a, NULL}, /* ZTIF761 - Zoom ComStar 33.6 */ 533 {0} 534 }; 535 536 537 538 static int 539 sio_isa_probe(device_t dev) 540 { 541 /* Check isapnp ids */ 542 if (ISA_PNP_PROBE(device_get_parent(dev), dev, sio_ids) == ENXIO) 543 return (ENXIO); 544 return (sioprobe(dev, 0, 0UL)); 545 } 546 547 int 548 sioprobe(device_t dev, int xrid, u_long rclk) 549 { 550 #if 0 551 static bool_t already_init; 552 device_t xdev; 553 #endif 554 struct com_s *com; 555 u_int divisor; 556 bool_t failures[10]; 557 int fn; 558 device_t idev; 559 Port_t iobase; 560 intrmask_t irqmap[4]; 561 intrmask_t irqs; 562 u_char mcr_image; 563 int result; 564 u_long xirq; 565 u_int flags = device_get_flags(dev); 566 int rid; 567 struct resource *port; 568 569 rid = xrid; 570 port = bus_alloc_resource(dev, SYS_RES_IOPORT, &rid, 571 0, ~0, IO_COMSIZE, RF_ACTIVE); 572 if (!port) 573 return (ENXIO); 574 575 lwkt_gettoken(&tty_token); 576 com = device_get_softc(dev); 577 com->bst = rman_get_bustag(port); 578 com->bsh = rman_get_bushandle(port); 579 if (rclk == 0) 580 rclk = DEFAULT_RCLK; 581 com->rclk = rclk; 582 583 #if 0 584 /* 585 * XXX this is broken - when we are first called, there are no 586 * previously configured IO ports. We could hard code 587 * 0x3f8, 0x2f8, 0x3e8, 0x2e8 etc but that's probably worse. 588 * This code has been doing nothing since the conversion since 589 * "count" is zero the first time around. 590 */ 591 if (!already_init) { 592 /* 593 * Turn off MCR_IENABLE for all likely serial ports. An unused 594 * port with its MCR_IENABLE gate open will inhibit interrupts 595 * from any used port that shares the interrupt vector. 596 * XXX the gate enable is elsewhere for some multiports. 597 */ 598 device_t *devs; 599 int count, i, xioport; 600 601 devclass_get_devices(sio_devclass, &devs, &count); 602 for (i = 0; i < count; i++) { 603 xdev = devs[i]; 604 if (device_is_enabled(xdev) && 605 bus_get_resource(xdev, SYS_RES_IOPORT, 0, &xioport, 606 NULL) == 0) 607 outb(xioport + com_mcr, 0); 608 } 609 kfree(devs, M_TEMP); 610 already_init = TRUE; 611 } 612 #endif 613 614 if (COM_LLCONSOLE(flags)) { 615 kprintf("sio%d: reserved for low-level i/o\n", 616 device_get_unit(dev)); 617 bus_release_resource(dev, SYS_RES_IOPORT, rid, port); 618 lwkt_reltoken(&tty_token); 619 return (ENXIO); 620 } 621 622 /* 623 * If the device is on a multiport card and has an AST/4 624 * compatible interrupt control register, initialize this 625 * register and prepare to leave MCR_IENABLE clear in the mcr. 626 * Otherwise, prepare to set MCR_IENABLE in the mcr. 627 * Point idev to the device struct giving the correct id_irq. 628 * This is the struct for the master device if there is one. 629 */ 630 idev = dev; 631 mcr_image = MCR_IENABLE; 632 #ifdef COM_MULTIPORT 633 if (COM_ISMULTIPORT(flags)) { 634 Port_t xiobase; 635 u_long io; 636 637 idev = devclass_get_device(sio_devclass, COM_MPMASTER(flags)); 638 if (idev == NULL) { 639 kprintf("sio%d: master device %d not configured\n", 640 device_get_unit(dev), COM_MPMASTER(flags)); 641 idev = dev; 642 } 643 if (!COM_NOTAST4(flags)) { 644 if (bus_get_resource(idev, SYS_RES_IOPORT, 0, &io, 645 NULL) == 0) { 646 xiobase = io; 647 if (bus_get_resource(idev, SYS_RES_IRQ, 0, 648 NULL, NULL) == 0) 649 outb(xiobase + com_scr, 0x80); 650 else 651 outb(xiobase + com_scr, 0); 652 } 653 mcr_image = 0; 654 } 655 } 656 #endif /* COM_MULTIPORT */ 657 if (bus_get_resource(idev, SYS_RES_IRQ, 0, NULL, NULL) != 0) 658 mcr_image = 0; 659 660 bzero(failures, sizeof failures); 661 iobase = rman_get_start(port); 662 663 /* 664 * We don't want to get actual interrupts, just masked ones. 665 * Interrupts from this line should already be masked in the ICU, 666 * but mask them in the processor as well in case there are some 667 * (misconfigured) shared interrupts. 668 */ 669 com_lock(); 670 /* EXTRA DELAY? */ 671 672 /* 673 * For the TI16754 chips, set prescaler to 1 (4 is often the 674 * default after-reset value) as otherwise it's impossible to 675 * get highest baudrates. 676 */ 677 if (COM_TI16754(flags)) { 678 u_char cfcr, efr; 679 680 cfcr = sio_getreg(com, com_cfcr); 681 sio_setreg(com, com_cfcr, CFCR_EFR_ENABLE); 682 efr = sio_getreg(com, com_efr); 683 /* Unlock extended features to turn off prescaler. */ 684 sio_setreg(com, com_efr, efr | EFR_EFE); 685 /* Disable EFR. */ 686 sio_setreg(com, com_cfcr, (cfcr != CFCR_EFR_ENABLE) ? cfcr : 0); 687 /* Turn off prescaler. */ 688 sio_setreg(com, com_mcr, 689 sio_getreg(com, com_mcr) & ~MCR_PRESCALE); 690 sio_setreg(com, com_cfcr, CFCR_EFR_ENABLE); 691 sio_setreg(com, com_efr, efr); 692 sio_setreg(com, com_cfcr, cfcr); 693 } 694 695 /* 696 * Initialize the speed and the word size and wait long enough to 697 * drain the maximum of 16 bytes of junk in device output queues. 698 * The speed is undefined after a master reset and must be set 699 * before relying on anything related to output. There may be 700 * junk after a (very fast) soft reboot and (apparently) after 701 * master reset. 702 * XXX what about the UART bug avoided by waiting in comparam()? 703 * We don't want to to wait long enough to drain at 2 bps. 704 */ 705 if (iobase == siocniobase) { 706 DELAY((16 + 1) * 1000000 / (comdefaultrate / 10)); 707 } else { 708 sio_setreg(com, com_cfcr, CFCR_DLAB | CFCR_8BITS); 709 divisor = siodivisor(rclk, SIO_TEST_SPEED); 710 sio_setreg(com, com_dlbl, divisor & 0xff); 711 sio_setreg(com, com_dlbh, divisor >> 8); 712 sio_setreg(com, com_cfcr, CFCR_8BITS); 713 DELAY((16 + 1) * 1000000 / (SIO_TEST_SPEED / 10)); 714 } 715 716 /* 717 * Make sure we can drain the receiver. If we can't, the serial 718 * port may not exist. 719 */ 720 for (fn = 0; fn < 256; ++fn) { 721 if ((sio_getreg(com, com_lsr) & LSR_RXRDY) == 0) 722 break; 723 (void)sio_getreg(com, com_data); 724 } 725 if (fn == 256) { 726 com_unlock(); 727 lwkt_reltoken(&tty_token); 728 kprintf("sio%d: can't drain, serial port might " 729 "not exist, disabling\n", device_get_unit(dev)); 730 return (ENXIO); 731 } 732 733 /* 734 * Enable the interrupt gate and disable device interupts. This 735 * should leave the device driving the interrupt line low and 736 * guarantee an edge trigger if an interrupt can be generated. 737 */ 738 /* EXTRA DELAY? */ 739 sio_setreg(com, com_mcr, mcr_image); 740 sio_setreg(com, com_ier, 0); 741 DELAY(1000); /* XXX */ 742 irqmap[0] = isa_irq_pending(); 743 744 /* 745 * Attempt to set loopback mode so that we can send a null byte 746 * without annoying any external device. 747 */ 748 /* EXTRA DELAY? */ 749 sio_setreg(com, com_mcr, mcr_image | MCR_LOOPBACK); 750 751 /* 752 * Attempt to generate an output interrupt. On 8250's, setting 753 * IER_ETXRDY generates an interrupt independent of the current 754 * setting and independent of whether the THR is empty. On 16450's, 755 * setting IER_ETXRDY generates an interrupt independent of the 756 * current setting. On 16550A's, setting IER_ETXRDY only 757 * generates an interrupt when IER_ETXRDY is not already set. 758 */ 759 sio_setreg(com, com_ier, IER_ETXRDY); 760 761 /* 762 * On some 16x50 incompatibles, setting IER_ETXRDY doesn't generate 763 * an interrupt. They'd better generate one for actually doing 764 * output. Loopback may be broken on the same incompatibles but 765 * it's unlikely to do more than allow the null byte out. 766 */ 767 sio_setreg(com, com_data, 0); 768 DELAY((1 + 2) * 1000000 / (SIO_TEST_SPEED / 10)); 769 770 /* 771 * Turn off loopback mode so that the interrupt gate works again 772 * (MCR_IENABLE was hidden). This should leave the device driving 773 * an interrupt line high. It doesn't matter if the interrupt 774 * line oscillates while we are not looking at it, since interrupts 775 * are disabled. 776 */ 777 /* EXTRA DELAY? */ 778 sio_setreg(com, com_mcr, mcr_image); 779 780 /* 781 * Some pcmcia cards have the "TXRDY bug", so we check everyone 782 * for IIR_TXRDY implementation ( Palido 321s, DC-1S... ) 783 */ 784 if (COM_NOPROBE(flags)) { 785 /* Reading IIR register twice */ 786 for (fn = 0; fn < 2; fn ++) { 787 DELAY(10000); 788 failures[6] = sio_getreg(com, com_iir); 789 } 790 /* Check IIR_TXRDY clear ? */ 791 result = 0; 792 if (failures[6] & IIR_TXRDY) { 793 /* Nop, Double check with clearing IER */ 794 sio_setreg(com, com_ier, 0); 795 if (sio_getreg(com, com_iir) & IIR_NOPEND) { 796 /* Ok. we're familia this gang */ 797 SET_FLAG(dev, COM_C_IIR_TXRDYBUG); 798 } else { 799 /* Unknown, Just omit this chip.. XXX */ 800 result = ENXIO; 801 sio_setreg(com, com_mcr, 0); 802 } 803 } else { 804 /* OK. this is well-known guys */ 805 CLR_FLAG(dev, COM_C_IIR_TXRDYBUG); 806 } 807 sio_setreg(com, com_ier, 0); 808 sio_setreg(com, com_cfcr, CFCR_8BITS); 809 com_unlock(); 810 bus_release_resource(dev, SYS_RES_IOPORT, rid, port); 811 lwkt_reltoken(&tty_token); 812 return (iobase == siocniobase ? 0 : result); 813 } 814 815 /* 816 * Check that 817 * o the CFCR, IER and MCR in UART hold the values written to them 818 * (the values happen to be all distinct - this is good for 819 * avoiding false positive tests from bus echoes). 820 * o an output interrupt is generated and its vector is correct. 821 * o the interrupt goes away when the IIR in the UART is read. 822 */ 823 /* EXTRA DELAY? */ 824 failures[0] = sio_getreg(com, com_cfcr) - CFCR_8BITS; 825 failures[1] = sio_getreg(com, com_ier) - IER_ETXRDY; 826 failures[2] = sio_getreg(com, com_mcr) - mcr_image; 827 DELAY(10000); /* Some internal modems need this time */ 828 irqmap[1] = isa_irq_pending(); 829 failures[4] = (sio_getreg(com, com_iir) & IIR_IMASK) - IIR_TXRDY; 830 DELAY(1000); /* XXX */ 831 irqmap[2] = isa_irq_pending(); 832 failures[6] = (sio_getreg(com, com_iir) & IIR_IMASK) - IIR_NOPEND; 833 834 /* 835 * Turn off all device interrupts and check that they go off properly. 836 * Leave MCR_IENABLE alone. For ports without a master port, it gates 837 * the OUT2 output of the UART to 838 * the ICU input. Closing the gate would give a floating ICU input 839 * (unless there is another device driving it) and spurious interrupts. 840 * (On the system that this was first tested on, the input floats high 841 * and gives a (masked) interrupt as soon as the gate is closed.) 842 */ 843 sio_setreg(com, com_ier, 0); 844 sio_setreg(com, com_cfcr, CFCR_8BITS); /* dummy to avoid bus echo */ 845 failures[7] = sio_getreg(com, com_ier); 846 DELAY(1000); /* XXX */ 847 irqmap[3] = isa_irq_pending(); 848 failures[9] = (sio_getreg(com, com_iir) & IIR_IMASK) - IIR_NOPEND; 849 850 com_unlock(); 851 852 irqs = irqmap[1] & ~irqmap[0]; 853 if (bus_get_resource(idev, SYS_RES_IRQ, 0, &xirq, NULL) == 0 && 854 ((1 << xirq) & irqs) == 0) 855 kprintf( 856 "sio%d: configured irq %ld not in bitmap of probed irqs %#x\n", 857 device_get_unit(dev), xirq, irqs); 858 if (bootverbose) 859 kprintf("sio%d: irq maps: %#x %#x %#x %#x\n", 860 device_get_unit(dev), 861 irqmap[0], irqmap[1], irqmap[2], irqmap[3]); 862 863 result = 0; 864 for (fn = 0; fn < sizeof failures; ++fn) 865 if (failures[fn]) { 866 sio_setreg(com, com_mcr, 0); 867 result = ENXIO; 868 if (bootverbose) { 869 kprintf("sio%d: probe failed test(s):", 870 device_get_unit(dev)); 871 for (fn = 0; fn < sizeof failures; ++fn) 872 if (failures[fn]) 873 kprintf(" %d", fn); 874 kprintf("\n"); 875 } 876 break; 877 } 878 bus_release_resource(dev, SYS_RES_IOPORT, rid, port); 879 lwkt_reltoken(&tty_token); 880 return (iobase == siocniobase ? 0 : result); 881 } 882 883 #ifdef COM_ESP 884 static int 885 espattach(struct com_s *com, Port_t esp_port) 886 { 887 u_char dips; 888 u_char val; 889 890 /* 891 * Check the ESP-specific I/O port to see if we're an ESP 892 * card. If not, return failure immediately. 893 */ 894 if ((inb(esp_port) & 0xf3) == 0) { 895 kprintf(" port 0x%x is not an ESP board?\n", esp_port); 896 return (0); 897 } 898 899 lwkt_gettoken(&tty_token); 900 /* 901 * We've got something that claims to be a Hayes ESP card. 902 * Let's hope so. 903 */ 904 905 /* Get the dip-switch configuration */ 906 outb(esp_port + ESP_CMD1, ESP_GETDIPS); 907 dips = inb(esp_port + ESP_STATUS1); 908 909 /* 910 * Bits 0,1 of dips say which COM port we are. 911 */ 912 if (rman_get_start(com->ioportres) == likely_com_ports[dips & 0x03]) 913 kprintf(" : ESP"); 914 else { 915 kprintf(" esp_port has com %d\n", dips & 0x03); 916 lwkt_reltoken(&tty_token); 917 return (0); 918 } 919 920 /* 921 * Check for ESP version 2.0 or later: bits 4,5,6 = 010. 922 */ 923 outb(esp_port + ESP_CMD1, ESP_GETTEST); 924 val = inb(esp_port + ESP_STATUS1); /* clear reg 1 */ 925 val = inb(esp_port + ESP_STATUS2); 926 if ((val & 0x70) < 0x20) { 927 kprintf("-old (%o)", val & 0x70); 928 lwkt_reltoken(&tty_token); 929 return (0); 930 } 931 932 /* 933 * Check for ability to emulate 16550: bit 7 == 1 934 */ 935 if ((dips & 0x80) == 0) { 936 kprintf(" slave"); 937 lwkt_reltoken(&tty_token); 938 return (0); 939 } 940 941 /* 942 * Okay, we seem to be a Hayes ESP card. Whee. 943 */ 944 com->esp = TRUE; 945 com->esp_port = esp_port; 946 lwkt_reltoken(&tty_token); 947 return (1); 948 } 949 #endif /* COM_ESP */ 950 951 static int 952 sio_isa_attach(device_t dev) 953 { 954 return (sioattach(dev, 0, 0UL)); 955 } 956 957 int 958 sioattach(device_t dev, int xrid, u_long rclk) 959 { 960 struct com_s *com; 961 #ifdef COM_ESP 962 Port_t *espp; 963 #endif 964 Port_t iobase; 965 int minorbase; 966 int unit; 967 u_int flags; 968 int rid; 969 struct resource *port; 970 int ret; 971 static int did_init; 972 973 lwkt_gettoken(&tty_token); 974 if (did_init == 0) { 975 did_init = 1; 976 callout_init_mp(&sio_timeout_handle); 977 } 978 979 rid = xrid; 980 port = bus_alloc_resource(dev, SYS_RES_IOPORT, &rid, 981 0, ~0, IO_COMSIZE, RF_ACTIVE); 982 if (!port) { 983 lwkt_reltoken(&tty_token); 984 return (ENXIO); 985 } 986 987 iobase = rman_get_start(port); 988 unit = device_get_unit(dev); 989 com = device_get_softc(dev); 990 flags = device_get_flags(dev); 991 992 if (unit >= sio_numunits) 993 sio_numunits = unit + 1; 994 /* 995 * sioprobe() has initialized the device registers as follows: 996 * o cfcr = CFCR_8BITS. 997 * It is most important that CFCR_DLAB is off, so that the 998 * data port is not hidden when we enable interrupts. 999 * o ier = 0. 1000 * Interrupts are only enabled when the line is open. 1001 * o mcr = MCR_IENABLE, or 0 if the port has AST/4 compatible 1002 * interrupt control register or the config specifies no irq. 1003 * Keeping MCR_DTR and MCR_RTS off might stop the external 1004 * device from sending before we are ready. 1005 */ 1006 bzero(com, sizeof *com); 1007 com->unit = unit; 1008 com->ioportres = port; 1009 com->bst = rman_get_bustag(port); 1010 com->bsh = rman_get_bushandle(port); 1011 com->cfcr_image = CFCR_8BITS; 1012 com->dtr_wait = 3 * hz; 1013 callout_init_mp(&com->dtr_ch); 1014 callout_init_mp(&com->busy_ch); 1015 com->loses_outints = COM_LOSESOUTINTS(flags) != 0; 1016 com->no_irq = bus_get_resource(dev, SYS_RES_IRQ, 0, NULL, NULL) != 0; 1017 com->tx_fifo_size = 1; 1018 com->obufs[0].l_head = com->obuf1; 1019 com->obufs[1].l_head = com->obuf2; 1020 1021 com->data_port = iobase + com_data; 1022 com->int_id_port = iobase + com_iir; 1023 com->modem_ctl_port = iobase + com_mcr; 1024 com->mcr_image = inb(com->modem_ctl_port); 1025 com->line_status_port = iobase + com_lsr; 1026 com->modem_status_port = iobase + com_msr; 1027 com->intr_ctl_port = iobase + com_ier; 1028 1029 if (rclk == 0) 1030 rclk = DEFAULT_RCLK; 1031 com->rclk = rclk; 1032 1033 /* 1034 * We don't use all the flags from <sys/ttydefaults.h> since they 1035 * are only relevant for logins. It's important to have echo off 1036 * initially so that the line doesn't start blathering before the 1037 * echo flag can be turned off. 1038 */ 1039 com->it_in.c_iflag = 0; 1040 com->it_in.c_oflag = 0; 1041 com->it_in.c_cflag = TTYDEF_CFLAG; 1042 com->it_in.c_lflag = 0; 1043 if (unit == comconsole) { 1044 com->it_in.c_iflag = TTYDEF_IFLAG; 1045 com->it_in.c_oflag = TTYDEF_OFLAG; 1046 com->it_in.c_cflag = TTYDEF_CFLAG | CLOCAL; 1047 com->it_in.c_lflag = TTYDEF_LFLAG; 1048 com->lt_out.c_cflag = com->lt_in.c_cflag = CLOCAL; 1049 com->lt_out.c_ispeed = com->lt_out.c_ospeed = 1050 com->lt_in.c_ispeed = com->lt_in.c_ospeed = 1051 com->it_in.c_ispeed = com->it_in.c_ospeed = comdefaultrate; 1052 } else 1053 com->it_in.c_ispeed = com->it_in.c_ospeed = TTYDEF_SPEED; 1054 if (siosetwater(com, com->it_in.c_ispeed) != 0) { 1055 /* 1056 * Leave i/o resources allocated if this is a `cn'-level 1057 * console, so that other devices can't snarf them. 1058 */ 1059 if (iobase != siocniobase) 1060 bus_release_resource(dev, SYS_RES_IOPORT, rid, port); 1061 lwkt_reltoken(&tty_token); 1062 return (ENOMEM); 1063 } 1064 termioschars(&com->it_in); 1065 com->it_out = com->it_in; 1066 1067 /* attempt to determine UART type */ 1068 kprintf("sio%d: type", unit); 1069 1070 1071 #ifdef COM_MULTIPORT 1072 if (!COM_ISMULTIPORT(flags) && !COM_IIR_TXRDYBUG(flags)) 1073 #else 1074 if (!COM_IIR_TXRDYBUG(flags)) 1075 #endif 1076 { 1077 u_char scr; 1078 u_char scr1; 1079 u_char scr2; 1080 1081 scr = sio_getreg(com, com_scr); 1082 sio_setreg(com, com_scr, 0xa5); 1083 scr1 = sio_getreg(com, com_scr); 1084 sio_setreg(com, com_scr, 0x5a); 1085 scr2 = sio_getreg(com, com_scr); 1086 sio_setreg(com, com_scr, scr); 1087 if (scr1 != 0xa5 || scr2 != 0x5a) { 1088 kprintf(" 8250"); 1089 goto determined_type; 1090 } 1091 } 1092 sio_setreg(com, com_fifo, FIFO_ENABLE | FIFO_RX_HIGH); 1093 DELAY(100); 1094 com->st16650a = 0; 1095 switch (inb(com->int_id_port) & IIR_FIFO_MASK) { 1096 case FIFO_RX_LOW: 1097 kprintf(" 16450"); 1098 break; 1099 case FIFO_RX_MEDL: 1100 kprintf(" 16450?"); 1101 break; 1102 case FIFO_RX_MEDH: 1103 kprintf(" 16550?"); 1104 break; 1105 case FIFO_RX_HIGH: 1106 if (COM_NOFIFO(flags)) { 1107 kprintf(" 16550A fifo disabled"); 1108 } else { 1109 com->hasfifo = TRUE; 1110 if (COM_ST16650A(flags)) { 1111 com->st16650a = 1; 1112 com->tx_fifo_size = 32; 1113 kprintf(" ST16650A"); 1114 } else if (COM_TI16754(flags)) { 1115 com->tx_fifo_size = 64; 1116 kprintf(" TI16754"); 1117 } else { 1118 com->tx_fifo_size = COM_FIFOSIZE(flags); 1119 kprintf(" 16550A"); 1120 } 1121 } 1122 #ifdef COM_ESP 1123 for (espp = likely_esp_ports; *espp != 0; espp++) 1124 if (espattach(com, *espp)) { 1125 com->tx_fifo_size = 1024; 1126 break; 1127 } 1128 #endif 1129 if (!com->st16650a && !COM_TI16754(flags)) { 1130 if (!com->tx_fifo_size) 1131 com->tx_fifo_size = 16; 1132 else 1133 kprintf(" lookalike with %d bytes FIFO", 1134 com->tx_fifo_size); 1135 } 1136 1137 break; 1138 } 1139 #ifdef COM_ESP 1140 if (com->esp) { 1141 /* 1142 * Set 16550 compatibility mode. 1143 * We don't use the ESP_MODE_SCALE bit to increase the 1144 * fifo trigger levels because we can't handle large 1145 * bursts of input. 1146 * XXX flow control should be set in comparam(), not here. 1147 */ 1148 outb(com->esp_port + ESP_CMD1, ESP_SETMODE); 1149 outb(com->esp_port + ESP_CMD2, ESP_MODE_RTS | ESP_MODE_FIFO); 1150 1151 /* Set RTS/CTS flow control. */ 1152 outb(com->esp_port + ESP_CMD1, ESP_SETFLOWTYPE); 1153 outb(com->esp_port + ESP_CMD2, ESP_FLOW_RTS); 1154 outb(com->esp_port + ESP_CMD2, ESP_FLOW_CTS); 1155 1156 /* Set flow-control levels. */ 1157 outb(com->esp_port + ESP_CMD1, ESP_SETRXFLOW); 1158 outb(com->esp_port + ESP_CMD2, HIBYTE(768)); 1159 outb(com->esp_port + ESP_CMD2, LOBYTE(768)); 1160 outb(com->esp_port + ESP_CMD2, HIBYTE(512)); 1161 outb(com->esp_port + ESP_CMD2, LOBYTE(512)); 1162 } 1163 #endif /* COM_ESP */ 1164 sio_setreg(com, com_fifo, 0); 1165 determined_type: ; 1166 1167 #ifdef COM_MULTIPORT 1168 if (COM_ISMULTIPORT(flags)) { 1169 device_t masterdev; 1170 1171 com->multiport = TRUE; 1172 kprintf(" (multiport"); 1173 if (unit == COM_MPMASTER(flags)) 1174 kprintf(" master"); 1175 kprintf(")"); 1176 masterdev = devclass_get_device(sio_devclass, 1177 COM_MPMASTER(flags)); 1178 com->no_irq = (masterdev == NULL || bus_get_resource(masterdev, 1179 SYS_RES_IRQ, 0, NULL, NULL) != 0); 1180 } 1181 #endif /* COM_MULTIPORT */ 1182 if (unit == comconsole) 1183 kprintf(", console"); 1184 if (COM_IIR_TXRDYBUG(flags)) 1185 kprintf(" with a bogus IIR_TXRDY register"); 1186 kprintf("\n"); 1187 1188 if (!sio_registered) { 1189 register_swi_mp(SWI_TTY, siopoll, NULL, 1190 "swi_siopoll", NULL, -1); 1191 sio_registered = TRUE; 1192 } 1193 minorbase = UNIT_TO_MINOR(unit); 1194 make_dev(&sio_ops, minorbase, 1195 UID_ROOT, GID_WHEEL, 0600, "ttyd%r", unit); 1196 make_dev(&sio_ops, minorbase | CONTROL_INIT_STATE, 1197 UID_ROOT, GID_WHEEL, 0600, "ttyid%r", unit); 1198 make_dev(&sio_ops, minorbase | CONTROL_LOCK_STATE, 1199 UID_ROOT, GID_WHEEL, 0600, "ttyld%r", unit); 1200 make_dev(&sio_ops, minorbase | CALLOUT_MASK, 1201 UID_UUCP, GID_DIALER, 0660, "cuaa%r", unit); 1202 make_dev(&sio_ops, minorbase | CALLOUT_MASK | CONTROL_INIT_STATE, 1203 UID_UUCP, GID_DIALER, 0660, "cuaia%r", unit); 1204 make_dev(&sio_ops, minorbase | CALLOUT_MASK | CONTROL_LOCK_STATE, 1205 UID_UUCP, GID_DIALER, 0660, "cuala%r", unit); 1206 com->flags = flags; 1207 com->pps.ppscap = PPS_CAPTUREASSERT | PPS_CAPTURECLEAR; 1208 pps_init(&com->pps); 1209 1210 rid = 0; 1211 com->irqres = bus_alloc_resource(dev, SYS_RES_IRQ, &rid, 0ul, ~0ul, 1, 1212 RF_ACTIVE); 1213 if (com->irqres) { 1214 ret = BUS_SETUP_INTR(device_get_parent(dev), dev, 1215 com->irqres, INTR_MPSAFE, siointr, com, 1216 &com->cookie, NULL, NULL); 1217 if (ret) 1218 device_printf(dev, "could not activate interrupt\n"); 1219 #if defined(DDB) 1220 /* 1221 * Enable interrupts for early break-to-debugger support 1222 * on the console. 1223 */ 1224 if (ret == 0 && unit == comconsole && 1225 (break_to_debugger || alt_break_to_debugger)) { 1226 inb(siocniobase + com_data); 1227 outb(siocniobase + com_ier, 1228 IER_ERXRDY | IER_ERLS | 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 static 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 sysclock_t 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 #ifdef COM_MULTIPORT 1996 return; 1997 #else 1998 if (inb(com->int_id_port) & IIR_NOPEND) 1999 return; 2000 #endif 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 2014 lwkt_gettoken(&tty_token); 2015 mynor = minor(dev); 2016 2017 com = com_addr(MINOR_TO_UNIT(mynor)); 2018 if (com == NULL || com->gone) { 2019 lwkt_reltoken(&tty_token); 2020 return (ENODEV); 2021 } 2022 if (mynor & CONTROL_MASK) { 2023 struct termios *ct; 2024 2025 switch (mynor & CONTROL_MASK) { 2026 case CONTROL_INIT_STATE: 2027 ct = mynor & CALLOUT_MASK ? &com->it_out : &com->it_in; 2028 break; 2029 case CONTROL_LOCK_STATE: 2030 ct = mynor & CALLOUT_MASK ? &com->lt_out : &com->lt_in; 2031 break; 2032 default: 2033 lwkt_reltoken(&tty_token); 2034 return (ENODEV); /* /dev/nodev */ 2035 } 2036 switch (ap->a_cmd) { 2037 case TIOCSETA: 2038 error = priv_check_cred(ap->a_cred, PRIV_ROOT, 0); 2039 if (error != 0) { 2040 lwkt_reltoken(&tty_token); 2041 return (error); 2042 } 2043 *ct = *(struct termios *)data; 2044 lwkt_reltoken(&tty_token); 2045 return (0); 2046 case TIOCGETA: 2047 *(struct termios *)data = *ct; 2048 lwkt_reltoken(&tty_token); 2049 return (0); 2050 case TIOCGETD: 2051 *(int *)data = TTYDISC; 2052 lwkt_reltoken(&tty_token); 2053 return (0); 2054 case TIOCGWINSZ: 2055 bzero(data, sizeof(struct winsize)); 2056 lwkt_reltoken(&tty_token); 2057 return (0); 2058 default: 2059 lwkt_reltoken(&tty_token); 2060 return (ENOTTY); 2061 } 2062 } 2063 tp = com->tp; 2064 if (ap->a_cmd == TIOCSETA || ap->a_cmd == TIOCSETAW || 2065 ap->a_cmd == TIOCSETAF) { 2066 int cc; 2067 struct termios *dt = (struct termios *)data; 2068 struct termios *lt = mynor & CALLOUT_MASK 2069 ? &com->lt_out : &com->lt_in; 2070 2071 dt->c_iflag = (tp->t_iflag & lt->c_iflag) 2072 | (dt->c_iflag & ~lt->c_iflag); 2073 dt->c_oflag = (tp->t_oflag & lt->c_oflag) 2074 | (dt->c_oflag & ~lt->c_oflag); 2075 dt->c_cflag = (tp->t_cflag & lt->c_cflag) 2076 | (dt->c_cflag & ~lt->c_cflag); 2077 dt->c_lflag = (tp->t_lflag & lt->c_lflag) 2078 | (dt->c_lflag & ~lt->c_lflag); 2079 for (cc = 0; cc < NCCS; ++cc) 2080 if (lt->c_cc[cc] != 0) 2081 dt->c_cc[cc] = tp->t_cc[cc]; 2082 if (lt->c_ispeed != 0) 2083 dt->c_ispeed = tp->t_ispeed; 2084 if (lt->c_ospeed != 0) 2085 dt->c_ospeed = tp->t_ospeed; 2086 } 2087 error = (*linesw[tp->t_line].l_ioctl)(tp, ap->a_cmd, data, ap->a_fflag, ap->a_cred); 2088 if (error != ENOIOCTL) { 2089 lwkt_reltoken(&tty_token); 2090 return (error); 2091 } 2092 crit_enter(); 2093 error = ttioctl(tp, ap->a_cmd, data, ap->a_fflag); 2094 disc_optim(tp, &tp->t_termios, com); 2095 if (error != ENOIOCTL) { 2096 crit_exit(); 2097 lwkt_reltoken(&tty_token); 2098 return (error); 2099 } 2100 switch (ap->a_cmd) { 2101 case TIOCSBRK: 2102 sio_setreg(com, com_cfcr, com->cfcr_image |= CFCR_SBREAK); 2103 break; 2104 case TIOCCBRK: 2105 sio_setreg(com, com_cfcr, com->cfcr_image &= ~CFCR_SBREAK); 2106 break; 2107 case TIOCSDTR: 2108 (void)commctl(com, TIOCM_DTR, DMBIS); 2109 break; 2110 case TIOCCDTR: 2111 (void)commctl(com, TIOCM_DTR, DMBIC); 2112 break; 2113 /* 2114 * XXX should disallow changing MCR_RTS if CS_RTS_IFLOW is set. The 2115 * changes get undone on the next call to comparam(). 2116 */ 2117 case TIOCMSET: 2118 (void)commctl(com, *(int *)data, DMSET); 2119 break; 2120 case TIOCMBIS: 2121 (void)commctl(com, *(int *)data, DMBIS); 2122 break; 2123 case TIOCMBIC: 2124 (void)commctl(com, *(int *)data, DMBIC); 2125 break; 2126 case TIOCMGET: 2127 *(int *)data = commctl(com, 0, DMGET); 2128 break; 2129 case TIOCMSDTRWAIT: 2130 /* must be root since the wait applies to following logins */ 2131 error = priv_check_cred(ap->a_cred, PRIV_ROOT, 0); 2132 if (error != 0) { 2133 crit_exit(); 2134 lwkt_reltoken(&tty_token); 2135 return (error); 2136 } 2137 com->dtr_wait = *(int *)data * hz / 100; 2138 break; 2139 case TIOCMGDTRWAIT: 2140 *(int *)data = com->dtr_wait * 100 / hz; 2141 break; 2142 case TIOCTIMESTAMP: 2143 com->do_timestamp = TRUE; 2144 *(struct timeval *)data = com->timestamp; 2145 break; 2146 case TIOCDCDTIMESTAMP: 2147 com->do_dcd_timestamp = TRUE; 2148 *(struct timeval *)data = com->dcd_timestamp; 2149 break; 2150 default: 2151 crit_exit(); 2152 error = pps_ioctl(ap->a_cmd, data, &com->pps); 2153 if (error == ENODEV) 2154 error = ENOTTY; 2155 lwkt_reltoken(&tty_token); 2156 return (error); 2157 } 2158 crit_exit(); 2159 lwkt_reltoken(&tty_token); 2160 return (0); 2161 } 2162 2163 static void 2164 siopoll(void *dummy, void *frame) 2165 { 2166 int unit; 2167 2168 lwkt_gettoken(&tty_token); 2169 if (com_events == 0) { 2170 lwkt_reltoken(&tty_token); 2171 return; 2172 } 2173 2174 repeat: 2175 for (unit = 0; unit < sio_numunits; ++unit) { 2176 struct com_s *com; 2177 int incc; 2178 struct tty *tp; 2179 2180 com = com_addr(unit); 2181 if (com == NULL) 2182 continue; 2183 tp = com->tp; 2184 if (tp == NULL || com->gone) { 2185 /* 2186 * Discard any events related to never-opened or 2187 * going-away devices. 2188 */ 2189 com_lock(); 2190 incc = com->iptr - com->ibuf; 2191 com->iptr = com->ibuf; 2192 if (com->state & CS_CHECKMSR) { 2193 incc += LOTS_OF_EVENTS; 2194 com->state &= ~CS_CHECKMSR; 2195 } 2196 com_events -= incc; 2197 com_unlock(); 2198 continue; 2199 } 2200 if (com->iptr != com->ibuf) { 2201 com_lock(); 2202 sioinput(com); 2203 com_unlock(); 2204 } 2205 if (com->state & CS_CHECKMSR) { 2206 u_char delta_modem_status; 2207 2208 com_lock(); 2209 delta_modem_status = com->last_modem_status 2210 ^ com->prev_modem_status; 2211 com->prev_modem_status = com->last_modem_status; 2212 com_events -= LOTS_OF_EVENTS; 2213 com->state &= ~CS_CHECKMSR; 2214 com_unlock(); 2215 if (delta_modem_status & MSR_DCD) 2216 (*linesw[tp->t_line].l_modem) 2217 (tp, com->prev_modem_status & MSR_DCD); 2218 } 2219 if (com->state & CS_ODONE) { 2220 com_lock(); 2221 com_events -= LOTS_OF_EVENTS; 2222 com->state &= ~CS_ODONE; 2223 com_unlock(); 2224 if (!(com->state & CS_BUSY) 2225 && !(com->extra_state & CSE_BUSYCHECK)) { 2226 callout_reset(&com->busy_ch, hz / 100, 2227 siobusycheck, com); 2228 com->extra_state |= CSE_BUSYCHECK; 2229 } 2230 (*linesw[tp->t_line].l_start)(tp); 2231 } 2232 if (com_events == 0) 2233 break; 2234 } 2235 if (com_events >= LOTS_OF_EVENTS) 2236 goto repeat; 2237 lwkt_reltoken(&tty_token); 2238 } 2239 2240 /* 2241 * Called with tty_token held but no com_lock 2242 */ 2243 static int 2244 comparam(struct tty *tp, struct termios *t) 2245 { 2246 u_int cfcr; 2247 int cflag; 2248 struct com_s *com; 2249 u_int divisor; 2250 u_char dlbh; 2251 u_char dlbl; 2252 int unit; 2253 2254 unit = DEV_TO_UNIT(tp->t_dev); 2255 com = com_addr(unit); 2256 if (com == NULL) { 2257 return (ENODEV); 2258 } 2259 2260 /* do historical conversions */ 2261 if (t->c_ispeed == 0) 2262 t->c_ispeed = t->c_ospeed; 2263 2264 /* check requested parameters */ 2265 if (t->c_ospeed == 0) 2266 divisor = 0; 2267 else { 2268 if (t->c_ispeed != t->c_ospeed) 2269 return (EINVAL); 2270 divisor = siodivisor(com->rclk, t->c_ispeed); 2271 if (divisor == 0) 2272 return (EINVAL); 2273 } 2274 2275 /* parameters are OK, convert them to the com struct and the device */ 2276 crit_enter(); 2277 if (divisor == 0) 2278 (void)commctl(com, TIOCM_DTR, DMBIC); /* hang up line */ 2279 else 2280 (void)commctl(com, TIOCM_DTR, DMBIS); 2281 cflag = t->c_cflag; 2282 switch (cflag & CSIZE) { 2283 case CS5: 2284 cfcr = CFCR_5BITS; 2285 break; 2286 case CS6: 2287 cfcr = CFCR_6BITS; 2288 break; 2289 case CS7: 2290 cfcr = CFCR_7BITS; 2291 break; 2292 default: 2293 cfcr = CFCR_8BITS; 2294 break; 2295 } 2296 if (cflag & PARENB) { 2297 cfcr |= CFCR_PENAB; 2298 if (!(cflag & PARODD)) 2299 cfcr |= CFCR_PEVEN; 2300 } 2301 if (cflag & CSTOPB) 2302 cfcr |= CFCR_STOPB; 2303 2304 if (com->hasfifo && divisor != 0) { 2305 /* 2306 * Use a fifo trigger level low enough so that the input 2307 * latency from the fifo is less than about 16 msec and 2308 * the total latency is less than about 30 msec. These 2309 * latencies are reasonable for humans. Serial comms 2310 * protocols shouldn't expect anything better since modem 2311 * latencies are larger. 2312 * 2313 * Interrupts can be held up for long periods of time 2314 * due to inefficiencies in other parts of the kernel, 2315 * certain video cards, etc. Setting the FIFO trigger 2316 * point to MEDH instead of HIGH gives us 694uS of slop 2317 * (8 character times) instead of 173uS (2 character times) 2318 * @ 115200 bps. 2319 */ 2320 com->fifo_image = t->c_ospeed <= 4800 2321 ? FIFO_ENABLE : FIFO_ENABLE | FIFO_RX_MEDH; 2322 #ifdef COM_ESP 2323 /* 2324 * The Hayes ESP card needs the fifo DMA mode bit set 2325 * in compatibility mode. If not, it will interrupt 2326 * for each character received. 2327 */ 2328 if (com->esp) 2329 com->fifo_image |= FIFO_DMA_MODE; 2330 #endif 2331 sio_setreg(com, com_fifo, com->fifo_image); 2332 } 2333 2334 /* 2335 * This returns with interrupts disabled so that we can complete 2336 * the speed change atomically. Keeping interrupts disabled is 2337 * especially important while com_data is hidden. 2338 */ 2339 (void) siosetwater(com, t->c_ispeed); 2340 2341 if (divisor != 0) { 2342 sio_setreg(com, com_cfcr, cfcr | CFCR_DLAB); 2343 /* 2344 * Only set the divisor registers if they would change, 2345 * since on some 16550 incompatibles (UMC8669F), setting 2346 * them while input is arriving them loses sync until 2347 * data stops arriving. 2348 */ 2349 dlbl = divisor & 0xFF; 2350 if (sio_getreg(com, com_dlbl) != dlbl) 2351 sio_setreg(com, com_dlbl, dlbl); 2352 dlbh = divisor >> 8; 2353 if (sio_getreg(com, com_dlbh) != dlbh) 2354 sio_setreg(com, com_dlbh, dlbh); 2355 } 2356 2357 sio_setreg(com, com_cfcr, com->cfcr_image = cfcr); 2358 2359 if (!(tp->t_state & TS_TTSTOP)) 2360 com->state |= CS_TTGO; 2361 2362 if (cflag & CRTS_IFLOW) { 2363 if (com->st16650a) { 2364 sio_setreg(com, com_cfcr, 0xbf); 2365 sio_setreg(com, com_fifo, 2366 sio_getreg(com, com_fifo) | 0x40); 2367 } 2368 com->state |= CS_RTS_IFLOW; 2369 /* 2370 * If CS_RTS_IFLOW just changed from off to on, the change 2371 * needs to be propagated to MCR_RTS. This isn't urgent, 2372 * so do it later by calling comstart() instead of repeating 2373 * a lot of code from comstart() here. 2374 */ 2375 } else if (com->state & CS_RTS_IFLOW) { 2376 com->state &= ~CS_RTS_IFLOW; 2377 /* 2378 * CS_RTS_IFLOW just changed from on to off. Force MCR_RTS 2379 * on here, since comstart() won't do it later. 2380 */ 2381 outb(com->modem_ctl_port, com->mcr_image |= MCR_RTS); 2382 if (com->st16650a) { 2383 sio_setreg(com, com_cfcr, 0xbf); 2384 sio_setreg(com, com_fifo, 2385 sio_getreg(com, com_fifo) & ~0x40); 2386 } 2387 } 2388 2389 2390 /* 2391 * Set up state to handle output flow control. 2392 * XXX - worth handling MDMBUF (DCD) flow control at the lowest level? 2393 * Now has 10+ msec latency, while CTS flow has 50- usec latency. 2394 */ 2395 com->state |= CS_ODEVREADY; 2396 com->state &= ~CS_CTS_OFLOW; 2397 if (cflag & CCTS_OFLOW) { 2398 com->state |= CS_CTS_OFLOW; 2399 if (!(com->last_modem_status & MSR_CTS)) 2400 com->state &= ~CS_ODEVREADY; 2401 if (com->st16650a) { 2402 sio_setreg(com, com_cfcr, 0xbf); 2403 sio_setreg(com, com_fifo, 2404 sio_getreg(com, com_fifo) | 0x80); 2405 } 2406 } else { 2407 if (com->st16650a) { 2408 sio_setreg(com, com_cfcr, 0xbf); 2409 sio_setreg(com, com_fifo, 2410 sio_getreg(com, com_fifo) & ~0x80); 2411 } 2412 } 2413 2414 sio_setreg(com, com_cfcr, com->cfcr_image); 2415 2416 /* XXX shouldn't call functions while intrs are disabled. */ 2417 disc_optim(tp, t, com); 2418 /* 2419 * Recover from fiddling with CS_TTGO. We used to call siointr1() 2420 * unconditionally, but that defeated the careful discarding of 2421 * stale input in sioopen(). 2422 */ 2423 if (com->state >= (CS_BUSY | CS_TTGO)) { 2424 com_lock(); 2425 siointr1(com); 2426 com_unlock(); 2427 } 2428 crit_exit(); 2429 comstart(tp); 2430 if (com->ibufold != NULL) { 2431 kfree(com->ibufold, M_DEVBUF); 2432 com->ibufold = NULL; 2433 } 2434 return (0); 2435 } 2436 2437 /* 2438 * called with tty_token held 2439 */ 2440 static int 2441 siosetwater(struct com_s *com, speed_t speed) 2442 { 2443 int cp4ticks; 2444 u_char *ibuf; 2445 int ibufsize; 2446 struct tty *tp; 2447 2448 /* 2449 * Make the buffer size large enough to handle a softtty interrupt 2450 * latency of about 2 ticks without loss of throughput or data 2451 * (about 3 ticks if input flow control is not used or not honoured, 2452 * but a bit less for CS5-CS7 modes). 2453 */ 2454 cp4ticks = speed / 10 / hz * 4; 2455 for (ibufsize = 128; ibufsize < cp4ticks;) 2456 ibufsize <<= 1; 2457 if (ibufsize == com->ibufsize) 2458 return (0); 2459 2460 /* 2461 * Allocate input buffer. The extra factor of 2 in the size is 2462 * to allow for an error byte for each input byte. 2463 */ 2464 ibuf = kmalloc(2 * ibufsize, M_DEVBUF, M_WAITOK | M_ZERO); 2465 2466 /* Initialize non-critical variables. */ 2467 com->ibufold = com->ibuf; 2468 com->ibufsize = ibufsize; 2469 tp = com->tp; 2470 if (tp != NULL) { 2471 tp->t_ififosize = 2 * ibufsize; 2472 tp->t_ispeedwat = (speed_t)-1; 2473 tp->t_ospeedwat = (speed_t)-1; 2474 } 2475 2476 /* 2477 * Read current input buffer. 2478 */ 2479 com_lock(); 2480 if (com->iptr != com->ibuf) 2481 sioinput(com); 2482 2483 /*- 2484 * Initialize critical variables, including input buffer watermarks. 2485 * The external device is asked to stop sending when the buffer 2486 * exactly reaches high water, or when the high level requests it. 2487 * The high level is notified immediately (rather than at a later 2488 * clock tick) when this watermark is reached. 2489 * The buffer size is chosen so the watermark should almost never 2490 * be reached. 2491 * The low watermark is invisibly 0 since the buffer is always 2492 * emptied all at once. 2493 */ 2494 com->iptr = com->ibuf = ibuf; 2495 com->ibufend = ibuf + ibufsize; 2496 com->ierroff = ibufsize; 2497 com->ihighwater = ibuf + 3 * ibufsize / 4; 2498 com_unlock(); 2499 return (0); 2500 } 2501 2502 static void 2503 comstart(struct tty *tp) 2504 { 2505 struct com_s *com; 2506 int unit; 2507 2508 lwkt_gettoken(&tty_token); 2509 unit = DEV_TO_UNIT(tp->t_dev); 2510 com = com_addr(unit); 2511 if (com == NULL) { 2512 lwkt_reltoken(&tty_token); 2513 return; 2514 } 2515 crit_enter(); 2516 com_lock(); 2517 if (tp->t_state & TS_TTSTOP) 2518 com->state &= ~CS_TTGO; 2519 else 2520 com->state |= CS_TTGO; 2521 if (tp->t_state & TS_TBLOCK) { 2522 if (com->mcr_image & MCR_RTS && com->state & CS_RTS_IFLOW) 2523 outb(com->modem_ctl_port, com->mcr_image &= ~MCR_RTS); 2524 } else { 2525 if (!(com->mcr_image & MCR_RTS) && com->iptr < com->ihighwater 2526 && com->state & CS_RTS_IFLOW) 2527 outb(com->modem_ctl_port, com->mcr_image |= MCR_RTS); 2528 } 2529 com_unlock(); 2530 if (tp->t_state & (TS_TIMEOUT | TS_TTSTOP)) { 2531 ttwwakeup(tp); 2532 crit_exit(); 2533 lwkt_reltoken(&tty_token); 2534 return; 2535 } 2536 if (tp->t_outq.c_cc != 0) { 2537 struct lbq *qp; 2538 struct lbq *next; 2539 2540 if (!com->obufs[0].l_queued) { 2541 com->obufs[0].l_tail 2542 = com->obuf1 + q_to_b(&tp->t_outq, com->obuf1, 2543 sizeof com->obuf1); 2544 com->obufs[0].l_next = NULL; 2545 com->obufs[0].l_queued = TRUE; 2546 com_lock(); 2547 if (com->state & CS_BUSY) { 2548 qp = com->obufq.l_next; 2549 while ((next = qp->l_next) != NULL) 2550 qp = next; 2551 qp->l_next = &com->obufs[0]; 2552 } else { 2553 com->obufq.l_head = com->obufs[0].l_head; 2554 com->obufq.l_tail = com->obufs[0].l_tail; 2555 com->obufq.l_next = &com->obufs[0]; 2556 com->state |= CS_BUSY; 2557 } 2558 com_unlock(); 2559 } 2560 if (tp->t_outq.c_cc != 0 && !com->obufs[1].l_queued) { 2561 com->obufs[1].l_tail 2562 = com->obuf2 + q_to_b(&tp->t_outq, com->obuf2, 2563 sizeof com->obuf2); 2564 com->obufs[1].l_next = NULL; 2565 com->obufs[1].l_queued = TRUE; 2566 com_lock(); 2567 if (com->state & CS_BUSY) { 2568 qp = com->obufq.l_next; 2569 while ((next = qp->l_next) != NULL) 2570 qp = next; 2571 qp->l_next = &com->obufs[1]; 2572 } else { 2573 com->obufq.l_head = com->obufs[1].l_head; 2574 com->obufq.l_tail = com->obufs[1].l_tail; 2575 com->obufq.l_next = &com->obufs[1]; 2576 com->state |= CS_BUSY; 2577 } 2578 com_unlock(); 2579 } 2580 tp->t_state |= TS_BUSY; 2581 } 2582 com_lock(); 2583 if (com->state >= (CS_BUSY | CS_TTGO)) 2584 siointr1(com); /* fake interrupt to start output */ 2585 com_unlock(); 2586 ttwwakeup(tp); 2587 crit_exit(); 2588 lwkt_reltoken(&tty_token); 2589 } 2590 2591 static void 2592 comstop(struct tty *tp, int rw) 2593 { 2594 struct com_s *com; 2595 2596 lwkt_gettoken(&tty_token); 2597 com = com_addr(DEV_TO_UNIT(tp->t_dev)); 2598 if (com == NULL || com->gone) { 2599 lwkt_reltoken(&tty_token); 2600 return; 2601 } 2602 com_lock(); 2603 if (rw & FWRITE) { 2604 if (com->hasfifo) 2605 #ifdef COM_ESP 2606 /* XXX avoid h/w bug. */ 2607 if (!com->esp) 2608 #endif 2609 sio_setreg(com, com_fifo, 2610 FIFO_XMT_RST | com->fifo_image); 2611 com->obufs[0].l_queued = FALSE; 2612 com->obufs[1].l_queued = FALSE; 2613 if (com->state & CS_ODONE) 2614 com_events -= LOTS_OF_EVENTS; 2615 com->state &= ~(CS_ODONE | CS_BUSY); 2616 com->tp->t_state &= ~TS_BUSY; 2617 } 2618 if (rw & FREAD) { 2619 if (com->hasfifo) 2620 #ifdef COM_ESP 2621 /* XXX avoid h/w bug. */ 2622 if (!com->esp) 2623 #endif 2624 sio_setreg(com, com_fifo, 2625 FIFO_RCV_RST | com->fifo_image); 2626 com_events -= (com->iptr - com->ibuf); 2627 com->iptr = com->ibuf; 2628 } 2629 com_unlock(); 2630 comstart(tp); 2631 lwkt_reltoken(&tty_token); 2632 } 2633 2634 static int 2635 commctl(struct com_s *com, int bits, int how) 2636 { 2637 int mcr; 2638 int msr; 2639 2640 lwkt_gettoken(&tty_token); 2641 if (how == DMGET) { 2642 bits = TIOCM_LE; /* XXX - always enabled while open */ 2643 mcr = com->mcr_image; 2644 if (mcr & MCR_DTR) 2645 bits |= TIOCM_DTR; 2646 if (mcr & MCR_RTS) 2647 bits |= TIOCM_RTS; 2648 msr = com->prev_modem_status; 2649 if (msr & MSR_CTS) 2650 bits |= TIOCM_CTS; 2651 if (msr & MSR_DCD) 2652 bits |= TIOCM_CD; 2653 if (msr & MSR_DSR) 2654 bits |= TIOCM_DSR; 2655 /* 2656 * XXX - MSR_RI is naturally volatile, and we make MSR_TERI 2657 * more volatile by reading the modem status a lot. Perhaps 2658 * we should latch both bits until the status is read here. 2659 */ 2660 if (msr & (MSR_RI | MSR_TERI)) 2661 bits |= TIOCM_RI; 2662 lwkt_reltoken(&tty_token); 2663 return (bits); 2664 } 2665 mcr = 0; 2666 if (bits & TIOCM_DTR) 2667 mcr |= MCR_DTR; 2668 if (bits & TIOCM_RTS) 2669 mcr |= MCR_RTS; 2670 if (com->gone) { 2671 lwkt_reltoken(&tty_token); 2672 return(0); 2673 } 2674 com_lock(); 2675 switch (how) { 2676 case DMSET: 2677 outb(com->modem_ctl_port, 2678 com->mcr_image = mcr | (com->mcr_image & MCR_IENABLE)); 2679 break; 2680 case DMBIS: 2681 outb(com->modem_ctl_port, com->mcr_image |= mcr); 2682 break; 2683 case DMBIC: 2684 outb(com->modem_ctl_port, com->mcr_image &= ~mcr); 2685 break; 2686 } 2687 com_unlock(); 2688 lwkt_reltoken(&tty_token); 2689 return (0); 2690 } 2691 2692 /* 2693 * NOTE: Must be called with tty_token held 2694 */ 2695 static void 2696 siosettimeout(void) 2697 { 2698 struct com_s *com; 2699 bool_t someopen; 2700 int unit; 2701 2702 ASSERT_LWKT_TOKEN_HELD(&tty_token); 2703 /* 2704 * Set our timeout period to 1 second if no polled devices are open. 2705 * Otherwise set it to max(1/200, 1/hz). 2706 * Enable timeouts iff some device is open. 2707 */ 2708 callout_stop(&sio_timeout_handle); 2709 sio_timeout = hz; 2710 someopen = FALSE; 2711 for (unit = 0; unit < sio_numunits; ++unit) { 2712 com = com_addr(unit); 2713 if (com != NULL && com->tp != NULL 2714 && com->tp->t_state & TS_ISOPEN && !com->gone) { 2715 someopen = TRUE; 2716 if (com->poll || com->poll_output) { 2717 sio_timeout = hz > 200 ? hz / 200 : 1; 2718 break; 2719 } 2720 } 2721 } 2722 if (someopen) { 2723 sio_timeouts_until_log = hz / sio_timeout; 2724 callout_reset(&sio_timeout_handle, sio_timeout, 2725 comwakeup, NULL); 2726 } else { 2727 /* Flush error messages, if any. */ 2728 sio_timeouts_until_log = 1; 2729 comwakeup(NULL); 2730 callout_stop(&sio_timeout_handle); 2731 } 2732 } 2733 2734 /* 2735 * NOTE: Must be called with tty_token held 2736 */ 2737 static void 2738 comwakeup(void *chan) 2739 { 2740 struct com_s *com; 2741 int unit; 2742 2743 /* 2744 * Can be called from a callout too so just get the token 2745 */ 2746 lwkt_gettoken(&tty_token); 2747 callout_reset(&sio_timeout_handle, sio_timeout, comwakeup, NULL); 2748 2749 /* 2750 * Recover from lost output interrupts. 2751 * Poll any lines that don't use interrupts. 2752 */ 2753 for (unit = 0; unit < sio_numunits; ++unit) { 2754 com = com_addr(unit); 2755 if (com != NULL && !com->gone 2756 && (com->state >= (CS_BUSY | CS_TTGO) || com->poll)) { 2757 com_lock(); 2758 siointr1(com); 2759 com_unlock(); 2760 } 2761 } 2762 2763 /* 2764 * Check for and log errors, but not too often. 2765 */ 2766 if (--sio_timeouts_until_log > 0) { 2767 lwkt_reltoken(&tty_token); 2768 return; 2769 } 2770 sio_timeouts_until_log = hz / sio_timeout; 2771 for (unit = 0; unit < sio_numunits; ++unit) { 2772 int errnum; 2773 2774 com = com_addr(unit); 2775 if (com == NULL) 2776 continue; 2777 if (com->gone) 2778 continue; 2779 for (errnum = 0; errnum < CE_NTYPES; ++errnum) { 2780 u_int delta; 2781 u_long total; 2782 2783 com_lock(); 2784 delta = com->delta_error_counts[errnum]; 2785 com->delta_error_counts[errnum] = 0; 2786 com_unlock(); 2787 if (delta == 0) 2788 continue; 2789 total = com->error_counts[errnum] += delta; 2790 log(LOG_ERR, "sio%d: %u more %s%s (total %lu)\n", 2791 unit, delta, error_desc[errnum], 2792 delta == 1 ? "" : "s", total); 2793 } 2794 } 2795 lwkt_reltoken(&tty_token); 2796 } 2797 2798 static void 2799 disc_optim(struct tty *tp, struct termios *t, struct com_s *com) 2800 { 2801 lwkt_gettoken(&tty_token); 2802 if (!(t->c_iflag & (ICRNL | IGNCR | IMAXBEL | INLCR | ISTRIP | IXON)) 2803 && (!(t->c_iflag & BRKINT) || (t->c_iflag & IGNBRK)) 2804 && (!(t->c_iflag & PARMRK) 2805 || (t->c_iflag & (IGNPAR | IGNBRK)) == (IGNPAR | IGNBRK)) 2806 && !(t->c_lflag & (ECHO | ICANON | IEXTEN | ISIG | PENDIN)) 2807 && linesw[tp->t_line].l_rint == ttyinput) 2808 tp->t_state |= TS_CAN_BYPASS_L_RINT; 2809 else 2810 tp->t_state &= ~TS_CAN_BYPASS_L_RINT; 2811 com->hotchar = linesw[tp->t_line].l_hotchar; 2812 lwkt_reltoken(&tty_token); 2813 } 2814 2815 /* 2816 * Following are all routines needed for SIO to act as console 2817 */ 2818 #include <sys/cons.h> 2819 2820 struct siocnstate { 2821 u_char dlbl; 2822 u_char dlbh; 2823 u_char ier; 2824 u_char cfcr; 2825 u_char mcr; 2826 }; 2827 2828 static speed_t siocngetspeed (Port_t, u_long rclk); 2829 #if 0 2830 static void siocnclose (struct siocnstate *sp, Port_t iobase); 2831 #endif 2832 static void siocnopen (struct siocnstate *sp, Port_t iobase, int speed); 2833 static void siocntxwait (Port_t iobase); 2834 2835 static cn_probe_t siocnprobe; 2836 static cn_init_t siocninit; 2837 static cn_init_fini_t siocninit_fini; 2838 static cn_checkc_t siocncheckc; 2839 static cn_getc_t siocngetc; 2840 static cn_putc_t siocnputc; 2841 2842 #if defined(__i386__) || defined(__x86_64__) 2843 CONS_DRIVER(sio, siocnprobe, siocninit, siocninit_fini, 2844 NULL, siocngetc, siocncheckc, siocnputc, NULL, NULL); 2845 #endif 2846 2847 /* To get the GDB related variables */ 2848 #if DDB > 0 2849 #include <ddb/ddb.h> 2850 #endif 2851 2852 static void 2853 siocntxwait(Port_t iobase) 2854 { 2855 int timo; 2856 2857 /* 2858 * Wait for any pending transmission to finish. Required to avoid 2859 * the UART lockup bug when the speed is changed, and for normal 2860 * transmits. 2861 */ 2862 timo = 100000; 2863 while ((inb(iobase + com_lsr) & (LSR_TSRE | LSR_TXRDY)) 2864 != (LSR_TSRE | LSR_TXRDY) && --timo != 0) 2865 ; 2866 } 2867 2868 /* 2869 * Read the serial port specified and try to figure out what speed 2870 * it's currently running at. We're assuming the serial port has 2871 * been initialized and is basicly idle. This routine is only intended 2872 * to be run at system startup. 2873 * 2874 * If the value read from the serial port doesn't make sense, return 0. 2875 */ 2876 /* 2877 * NOTE: Must be called with tty_token held 2878 */ 2879 static speed_t 2880 siocngetspeed(Port_t iobase, u_long rclk) 2881 { 2882 u_int divisor; 2883 u_char dlbh; 2884 u_char dlbl; 2885 u_char cfcr; 2886 2887 cfcr = inb(iobase + com_cfcr); 2888 outb(iobase + com_cfcr, CFCR_DLAB | cfcr); 2889 2890 dlbl = inb(iobase + com_dlbl); 2891 dlbh = inb(iobase + com_dlbh); 2892 2893 outb(iobase + com_cfcr, cfcr); 2894 2895 divisor = dlbh << 8 | dlbl; 2896 2897 /* XXX there should be more sanity checking. */ 2898 if (divisor == 0) 2899 return (CONSPEED); 2900 return (rclk / (16UL * divisor)); 2901 } 2902 2903 static void 2904 siocnopen(struct siocnstate *sp, Port_t iobase, int speed) 2905 { 2906 u_int divisor; 2907 u_char dlbh; 2908 u_char dlbl; 2909 2910 /* 2911 * Save all the device control registers except the fifo register 2912 * and set our default ones (cs8 -parenb speed=comdefaultrate). 2913 * We can't save the fifo register since it is read-only. 2914 */ 2915 sp->ier = inb(iobase + com_ier); 2916 outb(iobase + com_ier, 0); /* spltty() doesn't stop siointr() */ 2917 siocntxwait(iobase); 2918 sp->cfcr = inb(iobase + com_cfcr); 2919 outb(iobase + com_cfcr, CFCR_DLAB | CFCR_8BITS); 2920 sp->dlbl = inb(iobase + com_dlbl); 2921 sp->dlbh = inb(iobase + com_dlbh); 2922 /* 2923 * Only set the divisor registers if they would change, since on 2924 * some 16550 incompatibles (Startech), setting them clears the 2925 * data input register. This also reduces the effects of the 2926 * UMC8669F bug. 2927 */ 2928 divisor = siodivisor(comdefaultrclk, speed); 2929 dlbl = divisor & 0xFF; 2930 if (sp->dlbl != dlbl) 2931 outb(iobase + com_dlbl, dlbl); 2932 dlbh = divisor >> 8; 2933 if (sp->dlbh != dlbh) 2934 outb(iobase + com_dlbh, dlbh); 2935 outb(iobase + com_cfcr, CFCR_8BITS); 2936 sp->mcr = inb(iobase + com_mcr); 2937 /* 2938 * We don't want interrupts, but must be careful not to "disable" 2939 * them by clearing the MCR_IENABLE bit, since that might cause 2940 * an interrupt by floating the IRQ line. 2941 */ 2942 outb(iobase + com_mcr, (sp->mcr & MCR_IENABLE) | MCR_DTR | MCR_RTS); 2943 } 2944 2945 #if 0 2946 static void 2947 siocnclose(struct siocnstate *sp, Port_t iobase) 2948 { 2949 /* 2950 * Restore the device control registers. 2951 */ 2952 siocntxwait(iobase); 2953 outb(iobase + com_cfcr, CFCR_DLAB | CFCR_8BITS); 2954 if (sp->dlbl != inb(iobase + com_dlbl)) 2955 outb(iobase + com_dlbl, sp->dlbl); 2956 if (sp->dlbh != inb(iobase + com_dlbh)) 2957 outb(iobase + com_dlbh, sp->dlbh); 2958 outb(iobase + com_cfcr, sp->cfcr); 2959 /* 2960 * XXX damp oscillations of MCR_DTR and MCR_RTS by not restoring them. 2961 */ 2962 outb(iobase + com_mcr, sp->mcr | MCR_DTR | MCR_RTS); 2963 outb(iobase + com_ier, sp->ier); 2964 } 2965 #endif 2966 2967 static void 2968 siocnprobe(struct consdev *cp) 2969 { 2970 u_char cfcr; 2971 u_int divisor; 2972 int unit; 2973 struct siocnstate sp; 2974 2975 /* 2976 * Find our first enabled console, if any. If it is a high-level 2977 * console device, then initialize it and return successfully. 2978 * If it is a low-level console device, then initialize it and 2979 * return unsuccessfully. It must be initialized in both cases 2980 * for early use by console drivers and debuggers. Initializing 2981 * the hardware is not necessary in all cases, since the i/o 2982 * routines initialize it on the fly, but it is necessary if 2983 * input might arrive while the hardware is switched back to an 2984 * uninitialized state. We can't handle multiple console devices 2985 * yet because our low-level routines don't take a device arg. 2986 * We trust the user to set the console flags properly so that we 2987 * don't need to probe. 2988 */ 2989 cp->cn_pri = CN_DEAD; 2990 2991 for (unit = 0; unit < 16; unit++) { /* XXX need to know how many */ 2992 int flags; 2993 int disabled; 2994 if (resource_int_value("sio", unit, "disabled", &disabled) == 0) { 2995 if (disabled) 2996 continue; 2997 } 2998 if (resource_int_value("sio", unit, "flags", &flags)) 2999 continue; 3000 if (COM_CONSOLE(flags) || COM_DEBUGGER(flags)) { 3001 int port; 3002 int baud; 3003 Port_t iobase; 3004 speed_t boot_speed; 3005 3006 if (resource_int_value("sio", unit, "port", &port)) 3007 continue; 3008 if (resource_int_value("sio", unit, "baud", &baud) == 0) 3009 boot_speed = baud; 3010 else 3011 boot_speed = 0; 3012 iobase = port; 3013 crit_enter(); 3014 if (boothowto & RB_SERIAL) { 3015 if (boot_speed == 0) { 3016 boot_speed = siocngetspeed(iobase, 3017 comdefaultrclk); 3018 } 3019 if (boot_speed) 3020 comdefaultrate = boot_speed; 3021 } 3022 3023 /* 3024 * Initialize the divisor latch. We can't rely on 3025 * siocnopen() to do this the first time, since it 3026 * avoids writing to the latch if the latch appears 3027 * to have the correct value. Also, if we didn't 3028 * just read the speed from the hardware, then we 3029 * need to set the speed in hardware so that 3030 * switching it later is null. 3031 */ 3032 com_lock(); 3033 cfcr = inb(iobase + com_cfcr); 3034 outb(iobase + com_cfcr, CFCR_DLAB | cfcr); 3035 divisor = siodivisor(comdefaultrclk, comdefaultrate); 3036 outb(iobase + com_dlbl, divisor & 0xff); 3037 outb(iobase + com_dlbh, divisor >> 8); 3038 outb(iobase + com_cfcr, cfcr); 3039 3040 siocnopen(&sp, iobase, comdefaultrate); 3041 com_unlock(); 3042 3043 crit_exit(); 3044 if (COM_CONSOLE(flags) && !COM_LLCONSOLE(flags)) { 3045 cp->cn_probegood = 1; 3046 cp->cn_private = (void *)(intptr_t)unit; 3047 cp->cn_pri = COM_FORCECONSOLE(flags) 3048 || boothowto & RB_SERIAL 3049 ? CN_REMOTE : CN_NORMAL; 3050 siocniobase = iobase; 3051 siocnunit = unit; 3052 } 3053 if (COM_DEBUGGER(flags) && gdb_tab == NULL) { 3054 kprintf("sio%d: gdb debugging port\n", unit); 3055 siogdbiobase = iobase; 3056 siogdbunit = unit; 3057 #if DDB > 0 3058 cp->cn_gdbprivate = (void *)(intptr_t)unit; 3059 gdb_tab = cp; 3060 #endif 3061 } 3062 } 3063 } 3064 #if defined(__i386__) || defined(__x86_64__) 3065 #if DDB > 0 3066 /* 3067 * XXX Ugly Compatibility. 3068 * If no gdb port has been specified, set it to be the console 3069 * as some configuration files don't specify the gdb port. 3070 */ 3071 if (gdb_tab == NULL && (boothowto & RB_GDB)) { 3072 kprintf("Warning: no GDB port specified. Defaulting to sio%d.\n", 3073 siocnunit); 3074 kprintf("Set flag 0x80 on desired GDB port in your\n"); 3075 kprintf("configuration file (currently sio only).\n"); 3076 siogdbiobase = siocniobase; 3077 siogdbunit = siocnunit; 3078 cp->cn_gdbprivate = (void *)(intptr_t)siocnunit; 3079 gdb_tab = cp; 3080 } 3081 #endif 3082 #endif 3083 } 3084 3085 static void 3086 siocninit(struct consdev *cp) 3087 { 3088 comconsole = (int)(intptr_t)cp->cn_private; 3089 } 3090 3091 static void 3092 siocninit_fini(struct consdev *cp) 3093 { 3094 cdev_t dev; 3095 int unit; 3096 3097 if (cp->cn_probegood) { 3098 unit = (int)(intptr_t)cp->cn_private; 3099 /* 3100 * Call devfs_find_device_by_name on ttydX to find the correct device, 3101 * as it should have been created already at this point by the 3102 * attach routine. 3103 * If it isn't found, the serial port was not attached at all and we 3104 * shouldn't be here, so assert this case. 3105 */ 3106 dev = devfs_find_device_by_name("ttyd%r", unit); 3107 3108 KKASSERT(dev != NULL); 3109 cp->cn_dev = dev; 3110 } 3111 } 3112 3113 static int 3114 siocncheckc(void *private) 3115 { 3116 int c; 3117 int unit = (int)(intptr_t)private; 3118 Port_t iobase; 3119 #if 0 3120 struct siocnstate sp; 3121 #endif 3122 3123 if (unit == siogdbunit) 3124 iobase = siogdbiobase; 3125 else 3126 iobase = siocniobase; 3127 com_lock(); 3128 crit_enter(); 3129 #if 0 3130 siocnopen(&sp, iobase, comdefaultrate); 3131 #endif 3132 if (inb(iobase + com_lsr) & LSR_RXRDY) 3133 c = inb(iobase + com_data); 3134 else 3135 c = -1; 3136 #if 0 3137 siocnclose(&sp, iobase); 3138 #endif 3139 crit_exit(); 3140 com_unlock(); 3141 return (c); 3142 } 3143 3144 3145 static int 3146 siocngetc(void *private) 3147 { 3148 int c; 3149 int unit = (int)(intptr_t)private; 3150 Port_t iobase; 3151 #if 0 3152 struct siocnstate sp; 3153 #endif 3154 3155 if (unit == siogdbunit) 3156 iobase = siogdbiobase; 3157 else 3158 iobase = siocniobase; 3159 com_lock(); 3160 crit_enter(); 3161 #if 0 3162 siocnopen(&sp, iobase, comdefaultrate); 3163 #endif 3164 while (!(inb(iobase + com_lsr) & LSR_RXRDY)) 3165 ; 3166 c = inb(iobase + com_data); 3167 #if 0 3168 siocnclose(&sp, iobase); 3169 #endif 3170 crit_exit(); 3171 com_unlock(); 3172 return (c); 3173 } 3174 3175 static void 3176 siocnputc(void *private, int c) 3177 { 3178 int unit = (int)(intptr_t)private; 3179 #if 0 3180 struct siocnstate sp; 3181 #endif 3182 Port_t iobase; 3183 3184 if (unit == siogdbunit) 3185 iobase = siogdbiobase; 3186 else 3187 iobase = siocniobase; 3188 com_lock(); 3189 crit_enter(); 3190 #if 0 3191 siocnopen(&sp, iobase, comdefaultrate); 3192 #endif 3193 siocntxwait(iobase); 3194 outb(iobase + com_data, c); 3195 #if 0 3196 siocnclose(&sp, iobase); 3197 #endif 3198 crit_exit(); 3199 com_unlock(); 3200 } 3201 3202 DRIVER_MODULE(sio, isa, sio_isa_driver, sio_devclass, NULL, NULL); 3203 DRIVER_MODULE(sio, acpi, sio_isa_driver, sio_devclass, NULL, NULL); 3204 #if NPCI > 0 3205 DRIVER_MODULE(sio, pci, sio_pci_driver, sio_devclass, NULL, NULL); 3206 #endif 3207 #if NPUC > 0 3208 DRIVER_MODULE(sio, puc, sio_puc_driver, sio_devclass, NULL, NULL); 3209 #endif 3210