Now available: The Design and Implementation of the FreeBSD Operating System (Second Edition)
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FreeBSD/Linux Kernel Cross Reference
sys/pc98/cbus/sio.c
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1 /*- 2 * Copyright (c) 1991 The Regents of the University of California. 3 * All rights reserved. 4 * 5 * Redistribution and use in source and binary forms, with or without 6 * modification, are permitted provided that the following conditions 7 * are met: 8 * 1. Redistributions of source code must retain the above copyright 9 * notice, this list of conditions and the following disclaimer. 10 * 2. Redistributions in binary form must reproduce the above copyright 11 * notice, this list of conditions and the following disclaimer in the 12 * documentation and/or other materials provided with the distribution. 13 * 4. Neither the name of the University nor the names of its contributors 14 * may be used to endorse or promote products derived from this software 15 * without specific prior written permission. 16 * 17 * THIS SOFTWARE IS PROVIDED BY THE REGENTS AND CONTRIBUTORS ``AS IS'' AND 18 * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE 19 * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE 20 * ARE DISCLAIMED. IN NO EVENT SHALL THE REGENTS OR CONTRIBUTORS BE LIABLE 21 * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL 22 * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS 23 * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) 24 * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT 25 * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY 26 * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF 27 * SUCH DAMAGE. 28 * 29 * $FreeBSD$ 30 * from: @(#)com.c 7.5 (Berkeley) 5/16/91 31 * from: i386/isa sio.c,v 1.234 32 */ 33 34 #include "opt_compat.h" 35 #include "opt_gdb.h" 36 #include "opt_kdb.h" 37 #include "opt_sio.h" 38 39 /* 40 * Serial driver, based on 386BSD-0.1 com driver. 41 * Mostly rewritten to use pseudo-DMA. 42 * Works for National Semiconductor NS8250-NS16550AF UARTs. 43 * COM driver, based on HP dca driver. 44 * 45 * Changes for PC Card integration: 46 * - Added PC Card driver table and handlers 47 */ 48 /*=============================================================== 49 * 386BSD(98),FreeBSD-1.1x(98) com driver. 50 * ----- 51 * modified for PC9801 by M.Ishii 52 * Kyoto University Microcomputer Club (KMC) 53 * Chou "TEFUTEFU" Hirotomi 54 * Kyoto Univ. the faculty of medicine 55 *=============================================================== 56 * FreeBSD-2.0.1(98) sio driver. 57 * ----- 58 * modified for pc98 Internal i8251 and MICRO CORE MC16550II 59 * T.Koike(hfc01340@niftyserve.or.jp) 60 * implement kernel device configuration 61 * aizu@orient.center.nitech.ac.jp 62 * 63 * Notes. 64 * ----- 65 * PC98 localization based on 386BSD(98) com driver. Using its PC98 local 66 * functions. 67 * This driver is under debugging,has bugs. 68 */ 69 /* 70 * modified for AIWA B98-01 71 * by T.Hatanou <hatanou@yasuda.comm.waseda.ac.jp> last update: 15 Sep.1995 72 */ 73 /* 74 * Modified by Y.Takahashi of Kogakuin University. 75 */ 76 /* 77 * modified for 8251(FIFO) by Seigo TANIMURA <tanimura@FreeBSD.org> 78 */ 79 80 #include <sys/param.h> 81 #include <sys/systm.h> 82 #include <sys/bus.h> 83 #include <sys/conf.h> 84 #include <sys/fcntl.h> 85 #include <sys/interrupt.h> 86 #include <sys/kdb.h> 87 #include <sys/kernel.h> 88 #include <sys/limits.h> 89 #include <sys/lock.h> 90 #include <sys/malloc.h> 91 #include <sys/module.h> 92 #include <sys/mutex.h> 93 #include <sys/proc.h> 94 #include <sys/reboot.h> 95 #include <sys/serial.h> 96 #include <sys/sysctl.h> 97 #include <sys/syslog.h> 98 #include <sys/tty.h> 99 #include <machine/bus.h> 100 #include <sys/rman.h> 101 #include <sys/timepps.h> 102 #include <sys/uio.h> 103 #include <sys/cons.h> 104 105 #include <isa/isavar.h> 106 107 #include <machine/resource.h> 108 109 #include <dev/sio/sioreg.h> 110 #include <dev/sio/siovar.h> 111 112 #ifdef PC98 113 #include <pc98/cbus/cbus.h> 114 #include <pc98/pc98/pc98_machdep.h> 115 #endif 116 117 #ifdef COM_ESP 118 #include <dev/ic/esp.h> 119 #endif 120 #include <dev/ic/ns16550.h> 121 #ifdef PC98 122 #include <dev/ic/i8251.h> 123 #include <dev/ic/i8255.h> 124 #include <dev/ic/rsa.h> 125 #endif 126 127 #define LOTS_OF_EVENTS 64 /* helps separate urgent events from input */ 128 129 /* 130 * Meaning of flags: 131 * 132 * 0x00000001 shared IRQs 133 * 0x00000002 disable FIFO 134 * 0x00000008 recover sooner from lost output interrupts 135 * 0x00000010 device is potential system console 136 * 0x00000020 device is forced to become system console 137 * 0x00000040 device is reserved for low-level IO 138 * 0x00000080 use this port for remote kernel debugging 139 * 0x0000??00 minor number of master port 140 * 0x00010000 PPS timestamping on CTS instead of DCD 141 * 0x00080000 IIR_TXRDY bug 142 * 0x00400000 If no comconsole found then mark as a comconsole 143 * 0x1?000000 interface type 144 */ 145 146 #ifdef COM_MULTIPORT 147 /* checks in flags for multiport and which is multiport "master chip" 148 * for a given card 149 */ 150 #define COM_ISMULTIPORT(flags) ((flags) & 0x01) 151 #define COM_MPMASTER(flags) (((flags) >> 8) & 0x0ff) 152 #ifndef PC98 153 #define COM_NOTAST4(flags) ((flags) & 0x04) 154 #endif 155 #else 156 #define COM_ISMULTIPORT(flags) (0) 157 #endif /* COM_MULTIPORT */ 158 159 #define COM_C_IIR_TXRDYBUG 0x80000 160 #define COM_CONSOLE(flags) ((flags) & 0x10) 161 #define COM_DEBUGGER(flags) ((flags) & 0x80) 162 #ifndef PC98 163 #define COM_FIFOSIZE(flags) (((flags) & 0xff000000) >> 24) 164 #endif 165 #define COM_FORCECONSOLE(flags) ((flags) & 0x20) 166 #define COM_IIR_TXRDYBUG(flags) ((flags) & COM_C_IIR_TXRDYBUG) 167 #define COM_LLCONSOLE(flags) ((flags) & 0x40) 168 #define COM_LOSESOUTINTS(flags) ((flags) & 0x08) 169 #define COM_NOFIFO(flags) ((flags) & 0x02) 170 #ifndef PC98 171 #define COM_NOSCR(flags) ((flags) & 0x100000) 172 #endif 173 #define COM_PPSCTS(flags) ((flags) & 0x10000) 174 #ifndef PC98 175 #define COM_ST16650A(flags) ((flags) & 0x20000) 176 #define COM_TI16754(flags) ((flags) & 0x200000) 177 #endif 178 179 #define sio_getreg(com, off) \ 180 (bus_space_read_1((com)->bst, (com)->bsh, (off))) 181 #define sio_setreg(com, off, value) \ 182 (bus_space_write_1((com)->bst, (com)->bsh, (off), (value))) 183 184 /* 185 * com state bits. 186 * (CS_BUSY | CS_TTGO) and (CS_BUSY | CS_TTGO | CS_ODEVREADY) must be higher 187 * than the other bits so that they can be tested as a group without masking 188 * off the low bits. 189 * 190 * The following com and tty flags correspond closely: 191 * CS_BUSY = TS_BUSY (maintained by comstart(), siopoll() and 192 * comstop()) 193 * CS_TTGO = ~TS_TTSTOP (maintained by comparam() and comstart()) 194 * CS_CTS_OFLOW = CCTS_OFLOW (maintained by comparam()) 195 * CS_RTS_IFLOW = CRTS_IFLOW (maintained by comparam()) 196 * TS_FLUSH is not used. 197 * XXX I think TIOCSETA doesn't clear TS_TTSTOP when it clears IXON. 198 * XXX CS_*FLOW should be CF_*FLOW in com->flags (control flags not state). 199 */ 200 #define CS_BUSY 0x80 /* output in progress */ 201 #define CS_TTGO 0x40 /* output not stopped by XOFF */ 202 #define CS_ODEVREADY 0x20 /* external device h/w ready (CTS) */ 203 #define CS_CHECKMSR 1 /* check of MSR scheduled */ 204 #define CS_CTS_OFLOW 2 /* use CTS output flow control */ 205 #define CS_ODONE 4 /* output completed */ 206 #define CS_RTS_IFLOW 8 /* use RTS input flow control */ 207 #define CSE_BUSYCHECK 1 /* siobusycheck() scheduled */ 208 209 static char const * const error_desc[] = { 210 #define CE_OVERRUN 0 211 "silo overflow", 212 #define CE_INTERRUPT_BUF_OVERFLOW 1 213 "interrupt-level buffer overflow", 214 #define CE_TTY_BUF_OVERFLOW 2 215 "tty-level buffer overflow", 216 }; 217 218 #define CE_NTYPES 3 219 #define CE_RECORD(com, errnum) (++(com)->delta_error_counts[errnum]) 220 221 /* types. XXX - should be elsewhere */ 222 typedef u_int Port_t; /* hardware port */ 223 typedef u_char bool_t; /* boolean */ 224 225 /* queue of linear buffers */ 226 struct lbq { 227 u_char *l_head; /* next char to process */ 228 u_char *l_tail; /* one past the last char to process */ 229 struct lbq *l_next; /* next in queue */ 230 bool_t l_queued; /* nonzero if queued */ 231 }; 232 233 /* com device structure */ 234 struct com_s { 235 u_char state; /* miscellaneous flag bits */ 236 u_char cfcr_image; /* copy of value written to CFCR */ 237 #ifdef COM_ESP 238 bool_t esp; /* is this unit a hayes esp board? */ 239 #endif 240 u_char extra_state; /* more flag bits, separate for order trick */ 241 u_char fifo_image; /* copy of value written to FIFO */ 242 bool_t hasfifo; /* nonzero for 16550 UARTs */ 243 bool_t loses_outints; /* nonzero if device loses output interrupts */ 244 u_char mcr_image; /* copy of value written to MCR */ 245 #ifdef COM_MULTIPORT 246 bool_t multiport; /* is this unit part of a multiport device? */ 247 #endif /* COM_MULTIPORT */ 248 bool_t no_irq; /* nonzero if irq is not attached */ 249 bool_t gone; /* hardware disappeared */ 250 bool_t poll; /* nonzero if polling is required */ 251 bool_t poll_output; /* nonzero if polling for output is required */ 252 bool_t st16650a; /* nonzero if Startech 16650A compatible */ 253 int unit; /* unit number */ 254 u_int flags; /* copy of device flags */ 255 u_int tx_fifo_size; 256 257 /* 258 * The high level of the driver never reads status registers directly 259 * because there would be too many side effects to handle conveniently. 260 * Instead, it reads copies of the registers stored here by the 261 * interrupt handler. 262 */ 263 u_char last_modem_status; /* last MSR read by intr handler */ 264 u_char prev_modem_status; /* last MSR handled by high level */ 265 266 u_char *ibuf; /* start of input buffer */ 267 u_char *ibufend; /* end of input buffer */ 268 u_char *ibufold; /* old input buffer, to be freed */ 269 u_char *ihighwater; /* threshold in input buffer */ 270 u_char *iptr; /* next free spot in input buffer */ 271 int ibufsize; /* size of ibuf (not include error bytes) */ 272 int ierroff; /* offset of error bytes in ibuf */ 273 274 struct lbq obufq; /* head of queue of output buffers */ 275 struct lbq obufs[2]; /* output buffers */ 276 277 bus_space_tag_t bst; 278 bus_space_handle_t bsh; 279 280 #ifdef PC98 281 Port_t cmd_port; 282 Port_t sts_port; 283 Port_t in_modem_port; 284 Port_t intr_ctrl_port; 285 Port_t rsabase; /* Iobase address of an I/O-DATA RSA board. */ 286 int intr_enable; 287 int pc98_prev_modem_status; 288 int pc98_modem_delta; 289 int modem_car_chg_timer; 290 int pc98_prev_siocmd; 291 int pc98_prev_siomod; 292 int modem_checking; 293 int pc98_if_type; 294 295 bool_t pc98_8251fifo; 296 bool_t pc98_8251fifo_enable; 297 #endif /* PC98 */ 298 Port_t data_port; /* i/o ports */ 299 #ifdef COM_ESP 300 Port_t esp_port; 301 #endif 302 Port_t int_ctl_port; 303 Port_t int_id_port; 304 Port_t modem_ctl_port; 305 Port_t line_status_port; 306 Port_t modem_status_port; 307 308 struct tty *tp; /* cross reference */ 309 310 struct pps_state pps; 311 int pps_bit; 312 #ifdef KDB 313 int alt_brk_state; 314 #endif 315 316 u_long bytes_in; /* statistics */ 317 u_long bytes_out; 318 u_int delta_error_counts[CE_NTYPES]; 319 u_long error_counts[CE_NTYPES]; 320 321 u_long rclk; 322 323 struct resource *irqres; 324 struct resource *ioportres; 325 int ioportrid; 326 void *cookie; 327 328 /* 329 * Data area for output buffers. Someday we should build the output 330 * buffer queue without copying data. 331 */ 332 #ifdef PC98 333 int obufsize; 334 u_char *obuf1; 335 u_char *obuf2; 336 #else 337 u_char obuf1[256]; 338 u_char obuf2[256]; 339 #endif 340 }; 341 342 #ifdef COM_ESP 343 static int espattach(struct com_s *com, Port_t esp_port); 344 #endif 345 346 static void combreak(struct tty *tp, int sig); 347 static timeout_t siobusycheck; 348 static u_int siodivisor(u_long rclk, speed_t speed); 349 static void comclose(struct tty *tp); 350 static int comopen(struct tty *tp, struct cdev *dev); 351 static void sioinput(struct com_s *com); 352 static void siointr1(struct com_s *com); 353 static int siointr(void *arg); 354 static int commodem(struct tty *tp, int sigon, int sigoff); 355 static int comparam(struct tty *tp, struct termios *t); 356 static void siopoll(void *); 357 static void siosettimeout(void); 358 static int siosetwater(struct com_s *com, speed_t speed); 359 static void comstart(struct tty *tp); 360 static void comstop(struct tty *tp, int rw); 361 static timeout_t comwakeup; 362 363 char sio_driver_name[] = "sio"; 364 static struct mtx sio_lock; 365 static int sio_inited; 366 367 /* table and macro for fast conversion from a unit number to its com struct */ 368 devclass_t sio_devclass; 369 #define com_addr(unit) ((struct com_s *) \ 370 devclass_get_softc(sio_devclass, unit)) /* XXX */ 371 372 int comconsole = -1; 373 static volatile speed_t comdefaultrate = CONSPEED; 374 static u_long comdefaultrclk = DEFAULT_RCLK; 375 SYSCTL_ULONG(_machdep, OID_AUTO, conrclk, CTLFLAG_RW, &comdefaultrclk, 0, ""); 376 static speed_t gdbdefaultrate = GDBSPEED; 377 SYSCTL_UINT(_machdep, OID_AUTO, gdbspeed, CTLFLAG_RW, 378 &gdbdefaultrate, GDBSPEED, ""); 379 static u_int com_events; /* input chars + weighted output completions */ 380 static Port_t siocniobase; 381 static int siocnunit = -1; 382 static void *sio_slow_ih; 383 static void *sio_fast_ih; 384 static int sio_timeout; 385 static int sio_timeouts_until_log; 386 static struct callout_handle sio_timeout_handle 387 = CALLOUT_HANDLE_INITIALIZER(&sio_timeout_handle); 388 static int sio_numunits; 389 390 #ifdef PC98 391 struct siodev { 392 short if_type; 393 short irq; 394 Port_t cmd, sts, ctrl, mod; 395 }; 396 static int sysclock; 397 398 #define COM_INT_DISABLE {int previpri; previpri=spltty(); 399 #define COM_INT_ENABLE splx(previpri);} 400 #define IEN_TxFLAG IEN_Tx 401 402 #define COM_CARRIER_DETECT_EMULATE 0 403 #define PC98_CHECK_MODEM_INTERVAL (hz/10) 404 #define DCD_OFF_TOLERANCE 2 405 #define DCD_ON_RECOGNITION 2 406 #define IS_8251(if_type) (!(if_type & 0x10)) 407 #define COM1_EXT_CLOCK 0x40000 408 409 static void commint(struct cdev *dev); 410 static void com_tiocm_bis(struct com_s *com, int msr); 411 static void com_tiocm_bic(struct com_s *com, int msr); 412 static int com_tiocm_get(struct com_s *com); 413 static int com_tiocm_get_delta(struct com_s *com); 414 static void pc98_msrint_start(struct cdev *dev); 415 static void com_cflag_and_speed_set(struct com_s *com, int cflag, int speed); 416 static int pc98_ttspeedtab(struct com_s *com, int speed, u_int *divisor); 417 static int pc98_get_modem_status(struct com_s *com); 418 static timeout_t pc98_check_msr; 419 static void pc98_set_baud_rate(struct com_s *com, u_int count); 420 static void pc98_i8251_reset(struct com_s *com, int mode, int command); 421 static void pc98_disable_i8251_interrupt(struct com_s *com, int mod); 422 static void pc98_enable_i8251_interrupt(struct com_s *com, int mod); 423 static int pc98_check_i8251_interrupt(struct com_s *com); 424 static int pc98_i8251_get_cmd(struct com_s *com); 425 static int pc98_i8251_get_mod(struct com_s *com); 426 static void pc98_i8251_set_cmd(struct com_s *com, int x); 427 static void pc98_i8251_or_cmd(struct com_s *com, int x); 428 static void pc98_i8251_clear_cmd(struct com_s *com, int x); 429 static void pc98_i8251_clear_or_cmd(struct com_s *com, int clr, int x); 430 static int pc98_check_if_type(device_t dev, struct siodev *iod); 431 static int pc98_check_8251vfast(void); 432 static int pc98_check_8251fifo(void); 433 static void pc98_check_sysclock(void); 434 static void pc98_set_ioport(struct com_s *com); 435 436 #define com_int_Tx_disable(com) \ 437 pc98_disable_i8251_interrupt(com,IEN_Tx|IEN_TxEMP) 438 #define com_int_Tx_enable(com) \ 439 pc98_enable_i8251_interrupt(com,IEN_TxFLAG) 440 #define com_int_Rx_disable(com) \ 441 pc98_disable_i8251_interrupt(com,IEN_Rx) 442 #define com_int_Rx_enable(com) \ 443 pc98_enable_i8251_interrupt(com,IEN_Rx) 444 #define com_int_TxRx_disable(com) \ 445 pc98_disable_i8251_interrupt(com,IEN_Tx|IEN_TxEMP|IEN_Rx) 446 #define com_int_TxRx_enable(com) \ 447 pc98_enable_i8251_interrupt(com,IEN_TxFLAG|IEN_Rx) 448 #define com_send_break_on(com) \ 449 (IS_8251((com)->pc98_if_type) ? \ 450 pc98_i8251_or_cmd((com), CMD8251_SBRK) : \ 451 sio_setreg((com), com_cfcr, (com)->cfcr_image |= CFCR_SBREAK)) 452 #define com_send_break_off(com) \ 453 (IS_8251((com)->pc98_if_type) ? \ 454 pc98_i8251_clear_cmd((com), CMD8251_SBRK) : \ 455 sio_setreg((com), com_cfcr, (com)->cfcr_image &= ~CFCR_SBREAK)) 456 457 static struct speedtab pc98speedtab[] = { /* internal RS232C interface */ 458 { 0, 0, }, 459 { 50, 50, }, 460 { 75, 75, }, 461 { 150, 150, }, 462 { 200, 200, }, 463 { 300, 300, }, 464 { 600, 600, }, 465 { 1200, 1200, }, 466 { 2400, 2400, }, 467 { 4800, 4800, }, 468 { 9600, 9600, }, 469 { 19200, 19200, }, 470 { 38400, 38400, }, 471 { 51200, 51200, }, 472 { 76800, 76800, }, 473 { 20800, 20800, }, 474 { 31200, 31200, }, 475 { 41600, 41600, }, 476 { 62400, 62400, }, 477 { -1, -1 } 478 }; 479 static struct speedtab pc98fast_speedtab[] = { 480 { 9600, 0x80 | (DEFAULT_RCLK / (16 * (9600))), }, 481 { 19200, 0x80 | (DEFAULT_RCLK / (16 * (19200))), }, 482 { 38400, 0x80 | (DEFAULT_RCLK / (16 * (38400))), }, 483 { 57600, 0x80 | (DEFAULT_RCLK / (16 * (57600))), }, 484 { 115200, 0x80 | (DEFAULT_RCLK / (16 * (115200))), }, 485 { -1, -1 } 486 }; 487 static struct speedtab comspeedtab_pio9032b[] = { 488 { 300, 6, }, 489 { 600, 5, }, 490 { 1200, 4, }, 491 { 2400, 3, }, 492 { 4800, 2, }, 493 { 9600, 1, }, 494 { 19200, 0, }, 495 { 38400, 7, }, 496 { -1, -1 } 497 }; 498 static struct speedtab comspeedtab_b98_01[] = { 499 { 75, 11, }, 500 { 150, 10, }, 501 { 300, 9, }, 502 { 600, 8, }, 503 { 1200, 7, }, 504 { 2400, 6, }, 505 { 4800, 5, }, 506 { 9600, 4, }, 507 { 19200, 3, }, 508 { 38400, 2, }, 509 { 76800, 1, }, 510 { 153600, 0, }, 511 { -1, -1 } 512 }; 513 static struct speedtab comspeedtab_ind[] = { 514 { 300, 1536, }, 515 { 600, 768, }, 516 { 1200, 384, }, 517 { 2400, 192, }, 518 { 4800, 96, }, 519 { 9600, 48, }, 520 { 19200, 24, }, 521 { 38400, 12, }, 522 { 57600, 8, }, 523 { 115200, 4, }, 524 { 153600, 3, }, 525 { 230400, 2, }, 526 { 460800, 1, }, 527 { -1, -1 } 528 }; 529 530 struct { 531 char *name; 532 short port_table[7]; 533 short irr_mask; 534 struct speedtab *speedtab; 535 short check_irq; 536 } if_8251_type[] = { 537 /* COM_IF_INTERNAL */ 538 { " (internal)", {0x30, 0x32, 0x32, 0x33, 0x35, -1, -1}, 539 -1, pc98speedtab, 1 }, 540 /* COM_IF_PC9861K_1 */ 541 { " (PC9861K)", {0xb1, 0xb3, 0xb3, 0xb0, 0xb0, -1, -1}, 542 3, NULL, 1 }, 543 /* COM_IF_PC9861K_2 */ 544 { " (PC9861K)", {0xb9, 0xbb, 0xbb, 0xb2, 0xb2, -1, -1}, 545 3, NULL, 1 }, 546 /* COM_IF_IND_SS_1 */ 547 { " (IND-SS)", {0xb1, 0xb3, 0xb3, 0xb0, 0xb0, 0xb3, -1}, 548 3, comspeedtab_ind, 1 }, 549 /* COM_IF_IND_SS_2 */ 550 { " (IND-SS)", {0xb9, 0xbb, 0xbb, 0xb2, 0xb2, 0xbb, -1}, 551 3, comspeedtab_ind, 1 }, 552 /* COM_IF_PIO9032B_1 */ 553 { " (PIO9032B)", {0xb1, 0xb3, 0xb3, 0xb0, 0xb0, 0xb8, -1}, 554 7, comspeedtab_pio9032b, 1 }, 555 /* COM_IF_PIO9032B_2 */ 556 { " (PIO9032B)", {0xb9, 0xbb, 0xbb, 0xb2, 0xb2, 0xba, -1}, 557 7, comspeedtab_pio9032b, 1 }, 558 /* COM_IF_B98_01_1 */ 559 { " (B98-01)", {0xb1, 0xb3, 0xb3, 0xb0, 0xb0, 0xd1, 0xd3}, 560 7, comspeedtab_b98_01, 0 }, 561 /* COM_IF_B98_01_2 */ 562 { " (B98-01)", {0xb9, 0xbb, 0xbb, 0xb2, 0xb2, 0xd5, 0xd7}, 563 7, comspeedtab_b98_01, 0 }, 564 }; 565 #define PC98SIO_data_port(type) (if_8251_type[type].port_table[0]) 566 #define PC98SIO_cmd_port(type) (if_8251_type[type].port_table[1]) 567 #define PC98SIO_sts_port(type) (if_8251_type[type].port_table[2]) 568 #define PC98SIO_in_modem_port(type) (if_8251_type[type].port_table[3]) 569 #define PC98SIO_intr_ctrl_port(type) (if_8251_type[type].port_table[4]) 570 #define PC98SIO_baud_rate_port(type) (if_8251_type[type].port_table[5]) 571 #define PC98SIO_func_port(type) (if_8251_type[type].port_table[6]) 572 573 #define I8251F_data 0x130 574 #define I8251F_lsr 0x132 575 #define I8251F_msr 0x134 576 #define I8251F_iir 0x136 577 #define I8251F_fcr 0x138 578 #define I8251F_div 0x13a 579 580 581 static bus_addr_t port_table_0[] = 582 {0x000, 0x001, 0x002, 0x003, 0x004, 0x005, 0x006, 0x007}; 583 static bus_addr_t port_table_1[] = 584 {0x000, 0x002, 0x004, 0x006, 0x008, 0x00a, 0x00c, 0x00e}; 585 static bus_addr_t port_table_8[] = 586 {0x000, 0x100, 0x200, 0x300, 0x400, 0x500, 0x600, 0x700}; 587 static bus_addr_t port_table_rsa[] = { 588 0x008, 0x009, 0x00a, 0x00b, 0x00c, 0x00d, 0x00e, 0x00f, 589 0x000, 0x001, 0x002, 0x003, 0x004, 0x005, 0x006, 0x007 590 }; 591 592 struct { 593 char *name; 594 short irr_read; 595 short irr_write; 596 bus_addr_t *iat; 597 bus_size_t iatsz; 598 u_long rclk; 599 } if_16550a_type[] = { 600 /* COM_IF_RSA98 */ 601 {" (RSA-98)", -1, -1, port_table_0, IO_COMSIZE, DEFAULT_RCLK}, 602 /* COM_IF_NS16550 */ 603 {"", -1, -1, port_table_0, IO_COMSIZE, DEFAULT_RCLK}, 604 /* COM_IF_SECOND_CCU */ 605 {"", -1, -1, port_table_0, IO_COMSIZE, DEFAULT_RCLK}, 606 /* COM_IF_MC16550II */ 607 {" (MC16550II)", -1, 0x1000, port_table_8, IO_COMSIZE, 608 DEFAULT_RCLK * 4}, 609 /* COM_IF_MCRS98 */ 610 {" (MC-RS98)", -1, 0x1000, port_table_8, IO_COMSIZE, DEFAULT_RCLK * 4}, 611 /* COM_IF_RSB3000 */ 612 {" (RSB-3000)", 0xbf, -1, port_table_1, IO_COMSIZE, DEFAULT_RCLK * 10}, 613 /* COM_IF_RSB384 */ 614 {" (RSB-384)", 0xbf, -1, port_table_1, IO_COMSIZE, DEFAULT_RCLK * 10}, 615 /* COM_IF_MODEM_CARD */ 616 {"", -1, -1, port_table_0, IO_COMSIZE, DEFAULT_RCLK}, 617 /* COM_IF_RSA98III */ 618 {" (RSA-98III)", -1, -1, port_table_rsa, 16, DEFAULT_RCLK * 8}, 619 /* COM_IF_ESP98 */ 620 {" (ESP98)", -1, -1, port_table_1, IO_COMSIZE, DEFAULT_RCLK * 4}, 621 }; 622 #endif /* PC98 */ 623 624 #ifdef GDB 625 static Port_t siogdbiobase = 0; 626 #endif 627 628 #ifdef COM_ESP 629 #ifdef PC98 630 631 /* XXX configure this properly. */ 632 /* XXX quite broken for new-bus. */ 633 static Port_t likely_com_ports[] = { 0, 0xb0, 0xb1, 0 }; 634 static Port_t likely_esp_ports[] = { 0xc0d0, 0 }; 635 636 #define ESP98_CMD1 (ESP_CMD1 * 0x100) 637 #define ESP98_CMD2 (ESP_CMD2 * 0x100) 638 #define ESP98_STATUS1 (ESP_STATUS1 * 0x100) 639 #define ESP98_STATUS2 (ESP_STATUS2 * 0x100) 640 641 #else /* PC98 */ 642 643 /* XXX configure this properly. */ 644 static Port_t likely_com_ports[] = { 0x3f8, 0x2f8, 0x3e8, 0x2e8, }; 645 static Port_t likely_esp_ports[] = { 0x140, 0x180, 0x280, 0 }; 646 647 #endif /* PC98 */ 648 #endif 649 650 /* 651 * handle sysctl read/write requests for console speed 652 * 653 * In addition to setting comdefaultrate for I/O through /dev/console, 654 * also set the initial and lock values for the /dev/ttyXX device 655 * if there is one associated with the console. Finally, if the /dev/tty 656 * device has already been open, change the speed on the open running port 657 * itself. 658 */ 659 660 static int 661 sysctl_machdep_comdefaultrate(SYSCTL_HANDLER_ARGS) 662 { 663 int error, s; 664 speed_t newspeed; 665 struct com_s *com; 666 struct tty *tp; 667 668 newspeed = comdefaultrate; 669 670 error = sysctl_handle_opaque(oidp, &newspeed, sizeof newspeed, req); 671 if (error || !req->newptr) 672 return (error); 673 674 comdefaultrate = newspeed; 675 676 if (comconsole < 0) /* serial console not selected? */ 677 return (0); 678 679 com = com_addr(comconsole); 680 if (com == NULL) 681 return (ENXIO); 682 683 tp = com->tp; 684 if (tp == NULL) 685 return (ENXIO); 686 687 /* 688 * set the initial and lock rates for /dev/ttydXX and /dev/cuaXX 689 * (note, the lock rates really are boolean -- if non-zero, disallow 690 * speed changes) 691 */ 692 tp->t_init_in.c_ispeed = tp->t_init_in.c_ospeed = 693 tp->t_lock_in.c_ispeed = tp->t_lock_in.c_ospeed = 694 tp->t_init_out.c_ispeed = tp->t_init_out.c_ospeed = 695 tp->t_lock_out.c_ispeed = tp->t_lock_out.c_ospeed = comdefaultrate; 696 697 if (tp->t_state & TS_ISOPEN) { 698 tp->t_termios.c_ispeed = 699 tp->t_termios.c_ospeed = comdefaultrate; 700 s = spltty(); 701 error = comparam(tp, &tp->t_termios); 702 splx(s); 703 } 704 return error; 705 } 706 707 SYSCTL_PROC(_machdep, OID_AUTO, conspeed, CTLTYPE_INT | CTLFLAG_RW | CTLFLAG_NOFETCH, 708 0, 0, sysctl_machdep_comdefaultrate, "I", ""); 709 TUNABLE_INT("machdep.conspeed", __DEVOLATILE(int *, &comdefaultrate)); 710 711 /* 712 * Unload the driver and clear the table. 713 * XXX this is mostly wrong. 714 * XXX TODO: 715 * This is usually called when the card is ejected, but 716 * can be caused by a kldunload of a controller driver. 717 * The idea is to reset the driver's view of the device 718 * and ensure that any driver entry points such as 719 * read and write do not hang. 720 */ 721 int 722 siodetach(device_t dev) 723 { 724 struct com_s *com; 725 726 com = (struct com_s *) device_get_softc(dev); 727 if (com == NULL) { 728 device_printf(dev, "NULL com in siounload\n"); 729 return (0); 730 } 731 com->gone = TRUE; 732 if (com->tp) 733 ttyfree(com->tp); 734 if (com->irqres) { 735 bus_teardown_intr(dev, com->irqres, com->cookie); 736 bus_release_resource(dev, SYS_RES_IRQ, 0, com->irqres); 737 } 738 if (com->ioportres) 739 bus_release_resource(dev, SYS_RES_IOPORT, com->ioportrid, 740 com->ioportres); 741 if (com->ibuf != NULL) 742 free(com->ibuf, M_DEVBUF); 743 #ifdef PC98 744 if (com->obuf1 != NULL) 745 free(com->obuf1, M_DEVBUF); 746 #endif 747 748 device_set_softc(dev, NULL); 749 free(com, M_DEVBUF); 750 return (0); 751 } 752 753 int 754 sioprobe(dev, xrid, rclk, noprobe) 755 device_t dev; 756 int xrid; 757 u_long rclk; 758 int noprobe; 759 { 760 #if 0 761 static bool_t already_init; 762 device_t xdev; 763 #endif 764 struct com_s *com; 765 u_int divisor; 766 bool_t failures[10]; 767 int fn; 768 device_t idev; 769 Port_t iobase; 770 intrmask_t irqmap[4]; 771 intrmask_t irqs; 772 u_char mcr_image; 773 int result; 774 u_long xirq; 775 u_int flags = device_get_flags(dev); 776 int rid; 777 struct resource *port; 778 #ifdef PC98 779 int tmp; 780 struct siodev iod; 781 #endif 782 783 #ifdef PC98 784 iod.if_type = GET_IFTYPE(flags); 785 if ((iod.if_type < 0 || iod.if_type > COM_IF_END1) && 786 (iod.if_type < 0x10 || iod.if_type > COM_IF_END2)) 787 return ENXIO; 788 #endif 789 790 rid = xrid; 791 #ifdef PC98 792 if (IS_8251(iod.if_type)) { 793 port = bus_alloc_resource_any(dev, SYS_RES_IOPORT, &rid, 794 RF_ACTIVE); 795 } else if (iod.if_type == COM_IF_MODEM_CARD || 796 iod.if_type == COM_IF_RSA98III || 797 isa_get_vendorid(dev)) { 798 port = bus_alloc_resource_anywhere(dev, SYS_RES_IOPORT, &rid, 799 if_16550a_type[iod.if_type & 0x0f].iatsz, RF_ACTIVE); 800 } else { 801 port = isa_alloc_resourcev(dev, SYS_RES_IOPORT, &rid, 802 if_16550a_type[iod.if_type & 0x0f].iat, 803 if_16550a_type[iod.if_type & 0x0f].iatsz, RF_ACTIVE); 804 } 805 #else 806 port = bus_alloc_resource_anywhere(dev, SYS_RES_IOPORT, &rid, 807 IO_COMSIZE, RF_ACTIVE); 808 #endif 809 if (!port) 810 return (ENXIO); 811 #ifdef PC98 812 if (!IS_8251(iod.if_type)) { 813 if (isa_load_resourcev(port, 814 if_16550a_type[iod.if_type & 0x0f].iat, 815 if_16550a_type[iod.if_type & 0x0f].iatsz) != 0) { 816 bus_release_resource(dev, SYS_RES_IOPORT, rid, port); 817 return ENXIO; 818 } 819 } 820 #endif 821 822 com = malloc(sizeof(*com), M_DEVBUF, M_NOWAIT | M_ZERO); 823 if (com == NULL) { 824 bus_release_resource(dev, SYS_RES_IOPORT, rid, port); 825 return (ENOMEM); 826 } 827 device_set_softc(dev, com); 828 com->bst = rman_get_bustag(port); 829 com->bsh = rman_get_bushandle(port); 830 #ifdef PC98 831 if (!IS_8251(iod.if_type) && rclk == 0) 832 rclk = if_16550a_type[iod.if_type & 0x0f].rclk; 833 #else 834 if (rclk == 0) 835 rclk = DEFAULT_RCLK; 836 #endif 837 com->rclk = rclk; 838 839 while (sio_inited != 2) 840 if (atomic_cmpset_int(&sio_inited, 0, 1)) { 841 mtx_init(&sio_lock, sio_driver_name, NULL, 842 (comconsole != -1) ? 843 MTX_SPIN | MTX_QUIET : MTX_SPIN); 844 atomic_store_rel_int(&sio_inited, 2); 845 } 846 847 #if 0 848 /* 849 * XXX this is broken - when we are first called, there are no 850 * previously configured IO ports. We could hard code 851 * 0x3f8, 0x2f8, 0x3e8, 0x2e8 etc but that's probably worse. 852 * This code has been doing nothing since the conversion since 853 * "count" is zero the first time around. 854 */ 855 if (!already_init) { 856 /* 857 * Turn off MCR_IENABLE for all likely serial ports. An unused 858 * port with its MCR_IENABLE gate open will inhibit interrupts 859 * from any used port that shares the interrupt vector. 860 * XXX the gate enable is elsewhere for some multiports. 861 */ 862 device_t *devs; 863 int count, i, xioport; 864 #ifdef PC98 865 int xiftype; 866 #endif 867 868 devclass_get_devices(sio_devclass, &devs, &count); 869 #ifdef PC98 870 for (i = 0; i < count; i++) { 871 xdev = devs[i]; 872 xioport = bus_get_resource_start(xdev, SYS_RES_IOPORT, 0); 873 xiftype = GET_IFTYPE(device_get_flags(xdev)); 874 if (device_is_enabled(xdev) && xioport > 0) { 875 if (IS_8251(xiftype)) 876 outb((xioport & 0xff00) | PC98SIO_cmd_port(xiftype & 0x0f), 0xf2); 877 else 878 outb(xioport + if_16550a_type[xiftype & 0x0f].iat[com_mcr], 0); 879 } 880 } 881 #else 882 for (i = 0; i < count; i++) { 883 xdev = devs[i]; 884 if (device_is_enabled(xdev) && 885 bus_get_resource(xdev, SYS_RES_IOPORT, 0, &xioport, 886 NULL) == 0) 887 outb(xioport + com_mcr, 0); 888 } 889 #endif 890 free(devs, M_TEMP); 891 already_init = TRUE; 892 } 893 #endif 894 895 if (COM_LLCONSOLE(flags)) { 896 printf("sio%d: reserved for low-level i/o\n", 897 device_get_unit(dev)); 898 bus_release_resource(dev, SYS_RES_IOPORT, rid, port); 899 device_set_softc(dev, NULL); 900 free(com, M_DEVBUF); 901 return (ENXIO); 902 } 903 904 #ifdef PC98 905 DELAY(10); 906 907 /* 908 * If the port is i8251 UART (internal, B98_01) 909 */ 910 if (pc98_check_if_type(dev, &iod) == -1) { 911 bus_release_resource(dev, SYS_RES_IOPORT, rid, port); 912 device_set_softc(dev, NULL); 913 free(com, M_DEVBUF); 914 return (ENXIO); 915 } 916 if (iod.irq > 0) 917 bus_set_resource(dev, SYS_RES_IRQ, 0, iod.irq, 1); 918 if (IS_8251(iod.if_type)) { 919 outb(iod.cmd, 0); 920 DELAY(10); 921 outb(iod.cmd, 0); 922 DELAY(10); 923 outb(iod.cmd, 0); 924 DELAY(10); 925 outb(iod.cmd, CMD8251_RESET); 926 DELAY(1000); /* for a while...*/ 927 outb(iod.cmd, 0xf2); /* MODE (dummy) */ 928 DELAY(10); 929 outb(iod.cmd, 0x01); /* CMD (dummy) */ 930 DELAY(1000); /* for a while...*/ 931 if (( inb(iod.sts) & STS8251_TxEMP ) == 0 ) { 932 result = (ENXIO); 933 } 934 if (if_8251_type[iod.if_type & 0x0f].check_irq) { 935 COM_INT_DISABLE 936 tmp = ( inb( iod.ctrl ) & ~(IEN_Rx|IEN_TxEMP|IEN_Tx)); 937 outb( iod.ctrl, tmp|IEN_TxEMP ); 938 DELAY(10); 939 result = isa_irq_pending() ? 0 : ENXIO; 940 outb( iod.ctrl, tmp ); 941 COM_INT_ENABLE 942 } else { 943 /* 944 * B98_01 doesn't activate TxEMP interrupt line 945 * when being reset, so we can't check irq pending. 946 */ 947 result = 0; 948 } 949 bus_release_resource(dev, SYS_RES_IOPORT, rid, port); 950 if (result) { 951 device_set_softc(dev, NULL); 952 free(com, M_DEVBUF); 953 } 954 return result; 955 } 956 #endif /* PC98 */ 957 /* 958 * If the device is on a multiport card and has an AST/4 959 * compatible interrupt control register, initialize this 960 * register and prepare to leave MCR_IENABLE clear in the mcr. 961 * Otherwise, prepare to set MCR_IENABLE in the mcr. 962 * Point idev to the device struct giving the correct id_irq. 963 * This is the struct for the master device if there is one. 964 */ 965 idev = dev; 966 mcr_image = MCR_IENABLE; 967 #ifdef COM_MULTIPORT 968 if (COM_ISMULTIPORT(flags)) { 969 #ifndef PC98 970 Port_t xiobase; 971 u_long io; 972 #endif 973 974 idev = devclass_get_device(sio_devclass, COM_MPMASTER(flags)); 975 if (idev == NULL) { 976 printf("sio%d: master device %d not configured\n", 977 device_get_unit(dev), COM_MPMASTER(flags)); 978 idev = dev; 979 } 980 #ifndef PC98 981 if (!COM_NOTAST4(flags)) { 982 if (bus_get_resource(idev, SYS_RES_IOPORT, 0, &io, 983 NULL) == 0) { 984 xiobase = io; 985 if (bus_get_resource(idev, SYS_RES_IRQ, 0, 986 NULL, NULL) == 0) 987 outb(xiobase + com_scr, 0x80); 988 else 989 outb(xiobase + com_scr, 0); 990 } 991 mcr_image = 0; 992 } 993 #endif 994 } 995 #endif /* COM_MULTIPORT */ 996 if (bus_get_resource(idev, SYS_RES_IRQ, 0, NULL, NULL) != 0) 997 mcr_image = 0; 998 999 bzero(failures, sizeof failures); 1000 iobase = rman_get_start(port); 1001 1002 #ifdef PC98 1003 if (iod.if_type == COM_IF_RSA98III) { 1004 mcr_image = 0; 1005 1006 outb(iobase + rsa_msr, 0x04); 1007 outb(iobase + rsa_frr, 0x00); 1008 if ((inb(iobase + rsa_srr) & 0x36) != 0x36) { 1009 bus_release_resource(dev, SYS_RES_IOPORT, rid, port); 1010 device_set_softc(dev, NULL); 1011 free(com, M_DEVBUF); 1012 return (ENXIO); 1013 } 1014 outb(iobase + rsa_ier, 0x00); 1015 outb(iobase + rsa_frr, 0x00); 1016 outb(iobase + rsa_tivsr, 0x00); 1017 outb(iobase + rsa_tcr, 0x00); 1018 } 1019 1020 tmp = if_16550a_type[iod.if_type & 0x0f].irr_write; 1021 if (tmp != -1) { 1022 /* MC16550II */ 1023 int irqout; 1024 switch (isa_get_irq(idev)) { 1025 case 3: irqout = 4; break; 1026 case 5: irqout = 5; break; 1027 case 6: irqout = 6; break; 1028 case 12: irqout = 7; break; 1029 default: 1030 printf("sio%d: irq configuration error\n", 1031 device_get_unit(dev)); 1032 bus_release_resource(dev, SYS_RES_IOPORT, rid, port); 1033 device_set_softc(dev, NULL); 1034 free(com, M_DEVBUF); 1035 return (ENXIO); 1036 } 1037 outb((iobase & 0x00ff) | tmp, irqout); 1038 } 1039 #endif 1040 1041 /* 1042 * We don't want to get actual interrupts, just masked ones. 1043 * Interrupts from this line should already be masked in the ICU, 1044 * but mask them in the processor as well in case there are some 1045 * (misconfigured) shared interrupts. 1046 */ 1047 mtx_lock_spin(&sio_lock); 1048 /* EXTRA DELAY? */ 1049 1050 /* 1051 * Initialize the speed and the word size and wait long enough to 1052 * drain the maximum of 16 bytes of junk in device output queues. 1053 * The speed is undefined after a master reset and must be set 1054 * before relying on anything related to output. There may be 1055 * junk after a (very fast) soft reboot and (apparently) after 1056 * master reset. 1057 * XXX what about the UART bug avoided by waiting in comparam()? 1058 * We don't want to to wait long enough to drain at 2 bps. 1059 */ 1060 if (iobase == siocniobase) 1061 DELAY((16 + 1) * 1000000 / (comdefaultrate / 10)); 1062 else { 1063 sio_setreg(com, com_cfcr, CFCR_DLAB | CFCR_8BITS); 1064 divisor = siodivisor(rclk, SIO_TEST_SPEED); 1065 sio_setreg(com, com_dlbl, divisor & 0xff); 1066 sio_setreg(com, com_dlbh, divisor >> 8); 1067 sio_setreg(com, com_cfcr, CFCR_8BITS); 1068 DELAY((16 + 1) * 1000000 / (SIO_TEST_SPEED / 10)); 1069 } 1070 1071 /* 1072 * Enable the interrupt gate and disable device interrupts. This 1073 * should leave the device driving the interrupt line low and 1074 * guarantee an edge trigger if an interrupt can be generated. 1075 */ 1076 /* EXTRA DELAY? */ 1077 sio_setreg(com, com_mcr, mcr_image); 1078 sio_setreg(com, com_ier, 0); 1079 DELAY(1000); /* XXX */ 1080 irqmap[0] = isa_irq_pending(); 1081 1082 /* 1083 * Attempt to set loopback mode so that we can send a null byte 1084 * without annoying any external device. 1085 */ 1086 /* EXTRA DELAY? */ 1087 sio_setreg(com, com_mcr, mcr_image | MCR_LOOPBACK); 1088 1089 /* 1090 * Attempt to generate an output interrupt. On 8250's, setting 1091 * IER_ETXRDY generates an interrupt independent of the current 1092 * setting and independent of whether the THR is empty. On 16450's, 1093 * setting IER_ETXRDY generates an interrupt independent of the 1094 * current setting. On 16550A's, setting IER_ETXRDY only 1095 * generates an interrupt when IER_ETXRDY is not already set. 1096 */ 1097 sio_setreg(com, com_ier, IER_ETXRDY); 1098 #ifdef PC98 1099 if (iod.if_type == COM_IF_RSA98III) 1100 outb(iobase + rsa_ier, 0x04); 1101 #endif 1102 1103 /* 1104 * On some 16x50 incompatibles, setting IER_ETXRDY doesn't generate 1105 * an interrupt. They'd better generate one for actually doing 1106 * output. Loopback may be broken on the same incompatibles but 1107 * it's unlikely to do more than allow the null byte out. 1108 */ 1109 sio_setreg(com, com_data, 0); 1110 if (iobase == siocniobase) 1111 DELAY((1 + 2) * 1000000 / (comdefaultrate / 10)); 1112 else 1113 DELAY((1 + 2) * 1000000 / (SIO_TEST_SPEED / 10)); 1114 1115 /* 1116 * Turn off loopback mode so that the interrupt gate works again 1117 * (MCR_IENABLE was hidden). This should leave the device driving 1118 * an interrupt line high. It doesn't matter if the interrupt 1119 * line oscillates while we are not looking at it, since interrupts 1120 * are disabled. 1121 */ 1122 /* EXTRA DELAY? */ 1123 sio_setreg(com, com_mcr, mcr_image); 1124 1125 /* 1126 * It seems my Xircom CBEM56G Cardbus modem wants to be reset 1127 * to 8 bits *again*, or else probe test 0 will fail. 1128 * gwk@sgi.com, 4/19/2001 1129 */ 1130 sio_setreg(com, com_cfcr, CFCR_8BITS); 1131 1132 /* 1133 * Some PCMCIA cards (Palido 321s, DC-1S, ...) have the "TXRDY bug", 1134 * so we probe for a buggy IIR_TXRDY implementation even in the 1135 * noprobe case. We don't probe for it in the !noprobe case because 1136 * noprobe is always set for PCMCIA cards and the problem is not 1137 * known to affect any other cards. 1138 */ 1139 if (noprobe) { 1140 /* Read IIR a few times. */ 1141 for (fn = 0; fn < 2; fn ++) { 1142 DELAY(10000); 1143 failures[6] = sio_getreg(com, com_iir); 1144 } 1145 1146 /* IIR_TXRDY should be clear. Is it? */ 1147 result = 0; 1148 if (failures[6] & IIR_TXRDY) { 1149 /* 1150 * No. We seem to have the bug. Does our fix for 1151 * it work? 1152 */ 1153 sio_setreg(com, com_ier, 0); 1154 if (sio_getreg(com, com_iir) & IIR_NOPEND) { 1155 /* Yes. We discovered the TXRDY bug! */ 1156 SET_FLAG(dev, COM_C_IIR_TXRDYBUG); 1157 } else { 1158 /* No. Just fail. XXX */ 1159 result = ENXIO; 1160 sio_setreg(com, com_mcr, 0); 1161 } 1162 } else { 1163 /* Yes. No bug. */ 1164 CLR_FLAG(dev, COM_C_IIR_TXRDYBUG); 1165 } 1166 sio_setreg(com, com_ier, 0); 1167 sio_setreg(com, com_cfcr, CFCR_8BITS); 1168 mtx_unlock_spin(&sio_lock); 1169 bus_release_resource(dev, SYS_RES_IOPORT, rid, port); 1170 if (iobase == siocniobase) 1171 result = 0; 1172 if (result != 0) { 1173 device_set_softc(dev, NULL); 1174 free(com, M_DEVBUF); 1175 } 1176 return (result); 1177 } 1178 1179 /* 1180 * Check that 1181 * o the CFCR, IER and MCR in UART hold the values written to them 1182 * (the values happen to be all distinct - this is good for 1183 * avoiding false positive tests from bus echoes). 1184 * o an output interrupt is generated and its vector is correct. 1185 * o the interrupt goes away when the IIR in the UART is read. 1186 */ 1187 /* EXTRA DELAY? */ 1188 failures[0] = sio_getreg(com, com_cfcr) - CFCR_8BITS; 1189 failures[1] = sio_getreg(com, com_ier) - IER_ETXRDY; 1190 failures[2] = sio_getreg(com, com_mcr) - mcr_image; 1191 DELAY(10000); /* Some internal modems need this time */ 1192 irqmap[1] = isa_irq_pending(); 1193 failures[4] = (sio_getreg(com, com_iir) & IIR_IMASK) - IIR_TXRDY; 1194 #ifdef PC98 1195 if (iod.if_type == COM_IF_RSA98III) 1196 inb(iobase + rsa_srr); 1197 #endif 1198 DELAY(1000); /* XXX */ 1199 irqmap[2] = isa_irq_pending(); 1200 failures[6] = (sio_getreg(com, com_iir) & IIR_IMASK) - IIR_NOPEND; 1201 #ifdef PC98 1202 if (iod.if_type == COM_IF_RSA98III) 1203 inb(iobase + rsa_srr); 1204 #endif 1205 1206 /* 1207 * Turn off all device interrupts and check that they go off properly. 1208 * Leave MCR_IENABLE alone. For ports without a master port, it gates 1209 * the OUT2 output of the UART to 1210 * the ICU input. Closing the gate would give a floating ICU input 1211 * (unless there is another device driving it) and spurious interrupts. 1212 * (On the system that this was first tested on, the input floats high 1213 * and gives a (masked) interrupt as soon as the gate is closed.) 1214 */ 1215 sio_setreg(com, com_ier, 0); 1216 sio_setreg(com, com_cfcr, CFCR_8BITS); /* dummy to avoid bus echo */ 1217 failures[7] = sio_getreg(com, com_ier); 1218 #ifdef PC98 1219 if (iod.if_type == COM_IF_RSA98III) 1220 outb(iobase + rsa_ier, 0x00); 1221 #endif 1222 DELAY(1000); /* XXX */ 1223 irqmap[3] = isa_irq_pending(); 1224 failures[9] = (sio_getreg(com, com_iir) & IIR_IMASK) - IIR_NOPEND; 1225 #ifdef PC98 1226 if (iod.if_type == COM_IF_RSA98III) { 1227 inb(iobase + rsa_srr); 1228 outb(iobase + rsa_frr, 0x00); 1229 } 1230 #endif 1231 1232 mtx_unlock_spin(&sio_lock); 1233 1234 irqs = irqmap[1] & ~irqmap[0]; 1235 if (bus_get_resource(idev, SYS_RES_IRQ, 0, &xirq, NULL) == 0 && 1236 ((1 << xirq) & irqs) == 0) { 1237 printf( 1238 "sio%d: configured irq %ld not in bitmap of probed irqs %#x\n", 1239 device_get_unit(dev), xirq, irqs); 1240 printf( 1241 "sio%d: port may not be enabled\n", 1242 device_get_unit(dev)); 1243 } 1244 if (bootverbose) 1245 printf("sio%d: irq maps: %#x %#x %#x %#x\n", 1246 device_get_unit(dev), 1247 irqmap[0], irqmap[1], irqmap[2], irqmap[3]); 1248 1249 result = 0; 1250 for (fn = 0; fn < sizeof failures; ++fn) 1251 if (failures[fn]) { 1252 sio_setreg(com, com_mcr, 0); 1253 result = ENXIO; 1254 if (bootverbose) { 1255 printf("sio%d: probe failed test(s):", 1256 device_get_unit(dev)); 1257 for (fn = 0; fn < sizeof failures; ++fn) 1258 if (failures[fn]) 1259 printf(" %d", fn); 1260 printf("\n"); 1261 } 1262 break; 1263 } 1264 bus_release_resource(dev, SYS_RES_IOPORT, rid, port); 1265 if (iobase == siocniobase) 1266 result = 0; 1267 if (result != 0) { 1268 device_set_softc(dev, NULL); 1269 free(com, M_DEVBUF); 1270 } 1271 return (result); 1272 } 1273 1274 #ifdef COM_ESP 1275 static int 1276 espattach(com, esp_port) 1277 struct com_s *com; 1278 Port_t esp_port; 1279 { 1280 u_char dips; 1281 u_char val; 1282 1283 /* 1284 * Check the ESP-specific I/O port to see if we're an ESP 1285 * card. If not, return failure immediately. 1286 */ 1287 if ((inb(esp_port) & 0xf3) == 0) { 1288 printf(" port 0x%x is not an ESP board?\n", esp_port); 1289 return (0); 1290 } 1291 1292 /* 1293 * We've got something that claims to be a Hayes ESP card. 1294 * Let's hope so. 1295 */ 1296 1297 /* Get the dip-switch configuration */ 1298 #ifdef PC98 1299 outb(esp_port + ESP98_CMD1, ESP_GETDIPS); 1300 dips = inb(esp_port + ESP98_STATUS1); 1301 #else 1302 outb(esp_port + ESP_CMD1, ESP_GETDIPS); 1303 dips = inb(esp_port + ESP_STATUS1); 1304 #endif 1305 1306 /* 1307 * Bits 0,1 of dips say which COM port we are. 1308 */ 1309 #ifdef PC98 1310 if ((rman_get_start(com->ioportres) & 0xff) == 1311 likely_com_ports[dips & 0x03]) 1312 #else 1313 if (rman_get_start(com->ioportres) == likely_com_ports[dips & 0x03]) 1314 #endif 1315 printf(" : ESP"); 1316 else { 1317 printf(" esp_port has com %d\n", dips & 0x03); 1318 return (0); 1319 } 1320 1321 /* 1322 * Check for ESP version 2.0 or later: bits 4,5,6 = 010. 1323 */ 1324 #ifdef PC98 1325 outb(esp_port + ESP98_CMD1, ESP_GETTEST); 1326 val = inb(esp_port + ESP98_STATUS1); /* clear reg 1 */ 1327 val = inb(esp_port + ESP98_STATUS2); 1328 #else 1329 outb(esp_port + ESP_CMD1, ESP_GETTEST); 1330 val = inb(esp_port + ESP_STATUS1); /* clear reg 1 */ 1331 val = inb(esp_port + ESP_STATUS2); 1332 #endif 1333 if ((val & 0x70) < 0x20) { 1334 printf("-old (%o)", val & 0x70); 1335 return (0); 1336 } 1337 1338 /* 1339 * Check for ability to emulate 16550: bit 7 == 1 1340 */ 1341 if ((dips & 0x80) == 0) { 1342 printf(" slave"); 1343 return (0); 1344 } 1345 1346 /* 1347 * Okay, we seem to be a Hayes ESP card. Whee. 1348 */ 1349 com->esp = TRUE; 1350 com->esp_port = esp_port; 1351 return (1); 1352 } 1353 #endif /* COM_ESP */ 1354 1355 int 1356 sioattach(dev, xrid, rclk) 1357 device_t dev; 1358 int xrid; 1359 u_long rclk; 1360 { 1361 struct com_s *com; 1362 #ifdef COM_ESP 1363 Port_t *espp; 1364 #endif 1365 Port_t iobase; 1366 int unit; 1367 u_int flags; 1368 int rid; 1369 struct resource *port; 1370 int ret; 1371 int error; 1372 struct tty *tp; 1373 #ifdef PC98 1374 u_char *obuf; 1375 u_long obufsize; 1376 int if_type = GET_IFTYPE(device_get_flags(dev)); 1377 #endif 1378 1379 rid = xrid; 1380 #ifdef PC98 1381 if (IS_8251(if_type)) { 1382 port = bus_alloc_resource_any(dev, SYS_RES_IOPORT, &rid, 1383 RF_ACTIVE); 1384 } else if (if_type == COM_IF_MODEM_CARD || 1385 if_type == COM_IF_RSA98III || 1386 isa_get_vendorid(dev)) { 1387 port = bus_alloc_resource_anywhere(dev, SYS_RES_IOPORT, &rid, 1388 if_16550a_type[if_type & 0x0f].iatsz, RF_ACTIVE); 1389 } else { 1390 port = isa_alloc_resourcev(dev, SYS_RES_IOPORT, &rid, 1391 if_16550a_type[if_type & 0x0f].iat, 1392 if_16550a_type[if_type & 0x0f].iatsz, RF_ACTIVE); 1393 } 1394 #else 1395 port = bus_alloc_resource_anywhere(dev, SYS_RES_IOPORT, &rid, 1396 IO_COMSIZE, RF_ACTIVE); 1397 #endif 1398 if (!port) 1399 return (ENXIO); 1400 #ifdef PC98 1401 if (!IS_8251(if_type)) { 1402 if (isa_load_resourcev(port, 1403 if_16550a_type[if_type & 0x0f].iat, 1404 if_16550a_type[if_type & 0x0f].iatsz) != 0) { 1405 bus_release_resource(dev, SYS_RES_IOPORT, rid, port); 1406 return ENXIO; 1407 } 1408 } 1409 #endif 1410 1411 iobase = rman_get_start(port); 1412 unit = device_get_unit(dev); 1413 com = device_get_softc(dev); 1414 flags = device_get_flags(dev); 1415 1416 if (unit >= sio_numunits) 1417 sio_numunits = unit + 1; 1418 1419 #ifdef PC98 1420 obufsize = 256; 1421 if (if_type == COM_IF_RSA98III) 1422 obufsize = 2048; 1423 if ((obuf = malloc(obufsize * 2, M_DEVBUF, M_NOWAIT)) == NULL) { 1424 bus_release_resource(dev, SYS_RES_IOPORT, rid, port); 1425 return ENXIO; 1426 } 1427 bzero(obuf, obufsize * 2); 1428 #endif 1429 1430 /* 1431 * sioprobe() has initialized the device registers as follows: 1432 * o cfcr = CFCR_8BITS. 1433 * It is most important that CFCR_DLAB is off, so that the 1434 * data port is not hidden when we enable interrupts. 1435 * o ier = 0. 1436 * Interrupts are only enabled when the line is open. 1437 * o mcr = MCR_IENABLE, or 0 if the port has AST/4 compatible 1438 * interrupt control register or the config specifies no irq. 1439 * Keeping MCR_DTR and MCR_RTS off might stop the external 1440 * device from sending before we are ready. 1441 */ 1442 bzero(com, sizeof *com); 1443 com->unit = unit; 1444 com->ioportres = port; 1445 com->ioportrid = rid; 1446 com->bst = rman_get_bustag(port); 1447 com->bsh = rman_get_bushandle(port); 1448 com->cfcr_image = CFCR_8BITS; 1449 com->loses_outints = COM_LOSESOUTINTS(flags) != 0; 1450 com->no_irq = bus_get_resource(dev, SYS_RES_IRQ, 0, NULL, NULL) != 0; 1451 com->tx_fifo_size = 1; 1452 #ifdef PC98 1453 com->obufsize = obufsize; 1454 com->obuf1 = obuf; 1455 com->obuf2 = obuf + obufsize; 1456 #endif 1457 com->obufs[0].l_head = com->obuf1; 1458 com->obufs[1].l_head = com->obuf2; 1459 1460 #ifdef PC98 1461 com->pc98_if_type = if_type; 1462 1463 if (IS_8251(if_type)) { 1464 pc98_set_ioport(com); 1465 1466 if (if_type == COM_IF_INTERNAL && pc98_check_8251fifo()) { 1467 com->pc98_8251fifo = 1; 1468 com->pc98_8251fifo_enable = 0; 1469 } 1470 } else { 1471 bus_addr_t *iat = if_16550a_type[if_type & 0x0f].iat; 1472 1473 com->data_port = iobase + iat[com_data]; 1474 com->int_ctl_port = iobase + iat[com_ier]; 1475 com->int_id_port = iobase + iat[com_iir]; 1476 com->modem_ctl_port = iobase + iat[com_mcr]; 1477 com->mcr_image = inb(com->modem_ctl_port); 1478 com->line_status_port = iobase + iat[com_lsr]; 1479 com->modem_status_port = iobase + iat[com_msr]; 1480 } 1481 #else /* not PC98 */ 1482 com->data_port = iobase + com_data; 1483 com->int_ctl_port = iobase + com_ier; 1484 com->int_id_port = iobase + com_iir; 1485 com->modem_ctl_port = iobase + com_mcr; 1486 com->mcr_image = inb(com->modem_ctl_port); 1487 com->line_status_port = iobase + com_lsr; 1488 com->modem_status_port = iobase + com_msr; 1489 #endif 1490 1491 tp = com->tp = ttyalloc(); 1492 tp->t_oproc = comstart; 1493 tp->t_param = comparam; 1494 tp->t_stop = comstop; 1495 tp->t_modem = commodem; 1496 tp->t_break = combreak; 1497 tp->t_close = comclose; 1498 tp->t_open = comopen; 1499 tp->t_sc = com; 1500 1501 #ifdef PC98 1502 if (!IS_8251(if_type) && rclk == 0) 1503 rclk = if_16550a_type[if_type & 0x0f].rclk; 1504 #else 1505 if (rclk == 0) 1506 rclk = DEFAULT_RCLK; 1507 #endif 1508 com->rclk = rclk; 1509 1510 if (unit == comconsole) 1511 ttyconsolemode(tp, comdefaultrate); 1512 error = siosetwater(com, tp->t_init_in.c_ispeed); 1513 mtx_unlock_spin(&sio_lock); 1514 if (error) { 1515 /* 1516 * Leave i/o resources allocated if this is a `cn'-level 1517 * console, so that other devices can't snarf them. 1518 */ 1519 if (iobase != siocniobase) 1520 bus_release_resource(dev, SYS_RES_IOPORT, rid, port); 1521 return (ENOMEM); 1522 } 1523 1524 /* attempt to determine UART type */ 1525 printf("sio%d: type", unit); 1526 1527 #ifndef PC98 1528 if (!COM_ISMULTIPORT(flags) && 1529 !COM_IIR_TXRDYBUG(flags) && !COM_NOSCR(flags)) { 1530 u_char scr; 1531 u_char scr1; 1532 u_char scr2; 1533 1534 scr = sio_getreg(com, com_scr); 1535 sio_setreg(com, com_scr, 0xa5); 1536 scr1 = sio_getreg(com, com_scr); 1537 sio_setreg(com, com_scr, 0x5a); 1538 scr2 = sio_getreg(com, com_scr); 1539 sio_setreg(com, com_scr, scr); 1540 if (scr1 != 0xa5 || scr2 != 0x5a) { 1541 printf(" 8250 or not responding"); 1542 goto determined_type; 1543 } 1544 } 1545 #endif /* !PC98 */ 1546 #ifdef PC98 1547 if (IS_8251(com->pc98_if_type)) { 1548 if (com->pc98_8251fifo && !COM_NOFIFO(flags)) 1549 com->tx_fifo_size = 16; 1550 com_int_TxRx_disable( com ); 1551 com_cflag_and_speed_set( com, tp->t_init_in.c_cflag, comdefaultrate ); 1552 com_tiocm_bic( com, TIOCM_DTR|TIOCM_RTS|TIOCM_LE ); 1553 com_send_break_off( com ); 1554 1555 if (com->pc98_if_type == COM_IF_INTERNAL) { 1556 printf(" (internal%s%s)", 1557 com->pc98_8251fifo ? " fifo" : "", 1558 PC98SIO_baud_rate_port(com->pc98_if_type) != -1 ? 1559 " v-fast" : ""); 1560 } else { 1561 printf(" 8251%s", if_8251_type[com->pc98_if_type & 0x0f].name); 1562 } 1563 } else { 1564 #endif /* PC98 */ 1565 sio_setreg(com, com_fifo, FIFO_ENABLE | FIFO_RX_HIGH); 1566 DELAY(100); 1567 switch (inb(com->int_id_port) & IIR_FIFO_MASK) { 1568 case FIFO_RX_LOW: 1569 printf(" 16450"); 1570 break; 1571 case FIFO_RX_MEDL: 1572 printf(" 16450?"); 1573 break; 1574 case FIFO_RX_MEDH: 1575 printf(" 16550?"); 1576 break; 1577 case FIFO_RX_HIGH: 1578 if (COM_NOFIFO(flags)) { 1579 printf(" 16550A fifo disabled"); 1580 break; 1581 } 1582 com->hasfifo = TRUE; 1583 #ifdef PC98 1584 if (com->pc98_if_type == COM_IF_RSA98III) { 1585 com->tx_fifo_size = 2048; 1586 com->rsabase = iobase; 1587 outb(com->rsabase + rsa_ier, 0x00); 1588 outb(com->rsabase + rsa_frr, 0x00); 1589 } 1590 #else 1591 if (COM_ST16650A(flags)) { 1592 printf(" ST16650A"); 1593 com->st16650a = TRUE; 1594 com->tx_fifo_size = 32; 1595 break; 1596 } 1597 if (COM_TI16754(flags)) { 1598 printf(" TI16754"); 1599 com->tx_fifo_size = 64; 1600 break; 1601 } 1602 #endif 1603 printf(" 16550A"); 1604 #ifdef COM_ESP 1605 #ifdef PC98 1606 if (com->pc98_if_type == COM_IF_ESP98) 1607 #endif 1608 for (espp = likely_esp_ports; *espp != 0; espp++) 1609 if (espattach(com, *espp)) { 1610 com->tx_fifo_size = 1024; 1611 break; 1612 } 1613 if (com->esp) 1614 break; 1615 #endif 1616 #ifdef PC98 1617 com->tx_fifo_size = 16; 1618 #else 1619 com->tx_fifo_size = COM_FIFOSIZE(flags); 1620 if (com->tx_fifo_size == 0) 1621 com->tx_fifo_size = 16; 1622 else 1623 printf(" lookalike with %u bytes FIFO", 1624 com->tx_fifo_size); 1625 #endif 1626 break; 1627 } 1628 1629 #ifdef PC98 1630 if (com->pc98_if_type == COM_IF_RSB3000) { 1631 /* Set RSB-2000/3000 Extended Buffer mode. */ 1632 u_char lcr; 1633 lcr = sio_getreg(com, com_cfcr); 1634 sio_setreg(com, com_cfcr, lcr | CFCR_DLAB); 1635 sio_setreg(com, com_emr, EMR_EXBUFF | EMR_EFMODE); 1636 sio_setreg(com, com_cfcr, lcr); 1637 } 1638 #endif 1639 1640 #ifdef COM_ESP 1641 if (com->esp) { 1642 /* 1643 * Set 16550 compatibility mode. 1644 * We don't use the ESP_MODE_SCALE bit to increase the 1645 * fifo trigger levels because we can't handle large 1646 * bursts of input. 1647 * XXX flow control should be set in comparam(), not here. 1648 */ 1649 #ifdef PC98 1650 outb(com->esp_port + ESP98_CMD1, ESP_SETMODE); 1651 outb(com->esp_port + ESP98_CMD2, ESP_MODE_RTS | ESP_MODE_FIFO); 1652 #else 1653 outb(com->esp_port + ESP_CMD1, ESP_SETMODE); 1654 outb(com->esp_port + ESP_CMD2, ESP_MODE_RTS | ESP_MODE_FIFO); 1655 #endif 1656 1657 /* Set RTS/CTS flow control. */ 1658 #ifdef PC98 1659 outb(com->esp_port + ESP98_CMD1, ESP_SETFLOWTYPE); 1660 outb(com->esp_port + ESP98_CMD2, ESP_FLOW_RTS); 1661 outb(com->esp_port + ESP98_CMD2, ESP_FLOW_CTS); 1662 #else 1663 outb(com->esp_port + ESP_CMD1, ESP_SETFLOWTYPE); 1664 outb(com->esp_port + ESP_CMD2, ESP_FLOW_RTS); 1665 outb(com->esp_port + ESP_CMD2, ESP_FLOW_CTS); 1666 #endif 1667 1668 /* Set flow-control levels. */ 1669 #ifdef PC98 1670 outb(com->esp_port + ESP98_CMD1, ESP_SETRXFLOW); 1671 outb(com->esp_port + ESP98_CMD2, HIBYTE(768)); 1672 outb(com->esp_port + ESP98_CMD2, LOBYTE(768)); 1673 outb(com->esp_port + ESP98_CMD2, HIBYTE(512)); 1674 outb(com->esp_port + ESP98_CMD2, LOBYTE(512)); 1675 #else 1676 outb(com->esp_port + ESP_CMD1, ESP_SETRXFLOW); 1677 outb(com->esp_port + ESP_CMD2, HIBYTE(768)); 1678 outb(com->esp_port + ESP_CMD2, LOBYTE(768)); 1679 outb(com->esp_port + ESP_CMD2, HIBYTE(512)); 1680 outb(com->esp_port + ESP_CMD2, LOBYTE(512)); 1681 #endif 1682 1683 #ifdef PC98 1684 /* Set UART clock prescaler. */ 1685 outb(com->esp_port + ESP98_CMD1, ESP_SETCLOCK); 1686 outb(com->esp_port + ESP98_CMD2, 2); /* 4 times */ 1687 #endif 1688 } 1689 #endif /* COM_ESP */ 1690 sio_setreg(com, com_fifo, 0); 1691 #ifdef PC98 1692 printf("%s", if_16550a_type[com->pc98_if_type & 0x0f].name); 1693 #else 1694 determined_type: ; 1695 #endif 1696 1697 #ifdef COM_MULTIPORT 1698 if (COM_ISMULTIPORT(flags)) { 1699 device_t masterdev; 1700 1701 com->multiport = TRUE; 1702 printf(" (multiport"); 1703 if (unit == COM_MPMASTER(flags)) 1704 printf(" master"); 1705 printf(")"); 1706 masterdev = devclass_get_device(sio_devclass, 1707 COM_MPMASTER(flags)); 1708 com->no_irq = (masterdev == NULL || bus_get_resource(masterdev, 1709 SYS_RES_IRQ, 0, NULL, NULL) != 0); 1710 } 1711 #endif /* COM_MULTIPORT */ 1712 #ifdef PC98 1713 } 1714 #endif 1715 if (unit == comconsole) 1716 printf(", console"); 1717 if (COM_IIR_TXRDYBUG(flags)) 1718 printf(" with a buggy IIR_TXRDY implementation"); 1719 printf("\n"); 1720 1721 if (sio_fast_ih == NULL) { 1722 swi_add(&tty_intr_event, "sio", siopoll, NULL, SWI_TTY, 0, 1723 &sio_fast_ih); 1724 swi_add(&clk_intr_event, "sio", siopoll, NULL, SWI_CLOCK, 0, 1725 &sio_slow_ih); 1726 } 1727 1728 com->flags = flags; 1729 com->pps.ppscap = PPS_CAPTUREASSERT | PPS_CAPTURECLEAR; 1730 tp->t_pps = &com->pps; 1731 1732 if (COM_PPSCTS(flags)) 1733 com->pps_bit = MSR_CTS; 1734 else 1735 com->pps_bit = MSR_DCD; 1736 pps_init(&com->pps); 1737 1738 rid = 0; 1739 com->irqres = bus_alloc_resource_any(dev, SYS_RES_IRQ, &rid, RF_ACTIVE); 1740 if (com->irqres) { 1741 ret = bus_setup_intr(dev, com->irqres, 1742 INTR_TYPE_TTY, 1743 siointr, NULL, com, &com->cookie); 1744 if (ret) { 1745 ret = bus_setup_intr(dev, 1746 com->irqres, INTR_TYPE_TTY, 1747 NULL, (driver_intr_t *)siointr, 1748 com, &com->cookie); 1749 if (ret == 0) 1750 device_printf(dev, "unable to activate interrupt in fast mode - using normal mode\n"); 1751 } 1752 if (ret) 1753 device_printf(dev, "could not activate interrupt\n"); 1754 #if defined(KDB) 1755 /* 1756 * Enable interrupts for early break-to-debugger support 1757 * on the console. 1758 */ 1759 if (ret == 0 && unit == comconsole) 1760 outb(siocniobase + com_ier, IER_ERXRDY | IER_ERLS | 1761 IER_EMSC); 1762 #endif 1763 } 1764 1765 /* We're ready, open the doors... */ 1766 ttycreate(tp, TS_CALLOUT, "d%r", unit); 1767 1768 return (0); 1769 } 1770 1771 static int 1772 comopen(struct tty *tp, struct cdev *dev) 1773 { 1774 struct com_s *com; 1775 int i; 1776 1777 com = tp->t_sc; 1778 com->poll = com->no_irq; 1779 com->poll_output = com->loses_outints; 1780 #ifdef PC98 1781 if (IS_8251(com->pc98_if_type)) { 1782 com_tiocm_bis(com, TIOCM_DTR|TIOCM_RTS); 1783 pc98_msrint_start(dev); 1784 if (com->pc98_8251fifo) { 1785 com->pc98_8251fifo_enable = 1; 1786 outb(I8251F_fcr, 1787 FIFO_ENABLE | FIFO_XMT_RST | FIFO_RCV_RST); 1788 } 1789 } 1790 #endif 1791 if (com->hasfifo) { 1792 /* 1793 * (Re)enable and drain fifos. 1794 * 1795 * Certain SMC chips cause problems if the fifos 1796 * are enabled while input is ready. Turn off the 1797 * fifo if necessary to clear the input. We test 1798 * the input ready bit after enabling the fifos 1799 * since we've already enabled them in comparam() 1800 * and to handle races between enabling and fresh 1801 * input. 1802 */ 1803 for (i = 0; i < 500; i++) { 1804 sio_setreg(com, com_fifo, 1805 FIFO_RCV_RST | FIFO_XMT_RST | com->fifo_image); 1806 #ifdef PC98 1807 if (com->pc98_if_type == COM_IF_RSA98III) 1808 outb(com->rsabase + rsa_frr , 0x00); 1809 #endif 1810 /* 1811 * XXX the delays are for superstitious 1812 * historical reasons. It must be less than 1813 * the character time at the maximum 1814 * supported speed (87 usec at 115200 bps 1815 * 8N1). Otherwise we might loop endlessly 1816 * if data is streaming in. We used to use 1817 * delays of 100. That usually worked 1818 * because DELAY(100) used to usually delay 1819 * for about 85 usec instead of 100. 1820 */ 1821 DELAY(50); 1822 #ifdef PC98 1823 if (com->pc98_if_type == COM_IF_RSA98III ? 1824 !(inb(com->rsabase + rsa_srr) & 0x08) : 1825 !(inb(com->line_status_port) & LSR_RXRDY)) 1826 break; 1827 #else 1828 if (!(inb(com->line_status_port) & LSR_RXRDY)) 1829 break; 1830 #endif 1831 sio_setreg(com, com_fifo, 0); 1832 DELAY(50); 1833 (void) inb(com->data_port); 1834 } 1835 if (i == 500) 1836 return (EIO); 1837 } 1838 1839 mtx_lock_spin(&sio_lock); 1840 #ifdef PC98 1841 if (IS_8251(com->pc98_if_type)) { 1842 com_tiocm_bis(com, TIOCM_LE); 1843 com->pc98_prev_modem_status = pc98_get_modem_status(com); 1844 com_int_Rx_enable(com); 1845 } else { 1846 #endif 1847 (void) inb(com->line_status_port); 1848 (void) inb(com->data_port); 1849 com->prev_modem_status = com->last_modem_status 1850 = inb(com->modem_status_port); 1851 outb(com->int_ctl_port, 1852 IER_ERXRDY | IER_ERLS | IER_EMSC 1853 | (COM_IIR_TXRDYBUG(com->flags) ? 0 : IER_ETXRDY)); 1854 #ifdef PC98 1855 if (com->pc98_if_type == COM_IF_RSA98III) { 1856 outb(com->rsabase + rsa_ier, 0x1d); 1857 outb(com->int_ctl_port, IER_ERLS | IER_EMSC); 1858 } 1859 #endif 1860 #ifdef PC98 1861 } 1862 #endif 1863 mtx_unlock_spin(&sio_lock); 1864 siosettimeout(); 1865 /* XXX: should be generic ? */ 1866 #ifdef PC98 1867 if ((IS_8251(com->pc98_if_type) && 1868 (pc98_get_modem_status(com) & TIOCM_CAR)) || 1869 (!IS_8251(com->pc98_if_type) && 1870 (com->prev_modem_status & MSR_DCD)) || 1871 ISCALLOUT(dev)) 1872 ttyld_modem(tp, 1); 1873 #else 1874 if (com->prev_modem_status & MSR_DCD || ISCALLOUT(dev)) 1875 ttyld_modem(tp, 1); 1876 #endif 1877 return (0); 1878 } 1879 1880 static void 1881 comclose(tp) 1882 struct tty *tp; 1883 { 1884 int s; 1885 struct com_s *com; 1886 1887 s = spltty(); 1888 com = tp->t_sc; 1889 com->poll = FALSE; 1890 com->poll_output = FALSE; 1891 #ifdef PC98 1892 com_send_break_off(com); 1893 #else 1894 sio_setreg(com, com_cfcr, com->cfcr_image &= ~CFCR_SBREAK); 1895 #endif 1896 1897 #if defined(KDB) 1898 /* 1899 * Leave interrupts enabled and don't clear DTR if this is the 1900 * console. This allows us to detect break-to-debugger events 1901 * while the console device is closed. 1902 */ 1903 if (com->unit != comconsole) 1904 #endif 1905 { 1906 #ifdef PC98 1907 int tmp; 1908 if (IS_8251(com->pc98_if_type)) 1909 com_int_TxRx_disable(com); 1910 else 1911 sio_setreg(com, com_ier, 0); 1912 if (com->pc98_if_type == COM_IF_RSA98III) 1913 outb(com->rsabase + rsa_ier, 0x00); 1914 if (IS_8251(com->pc98_if_type)) 1915 tmp = pc98_get_modem_status(com) & TIOCM_CAR; 1916 else 1917 tmp = com->prev_modem_status & MSR_DCD; 1918 #else 1919 sio_setreg(com, com_ier, 0); 1920 #endif 1921 if (tp->t_cflag & HUPCL 1922 /* 1923 * XXX we will miss any carrier drop between here and the 1924 * next open. Perhaps we should watch DCD even when the 1925 * port is closed; it is not sufficient to check it at 1926 * the next open because it might go up and down while 1927 * we're not watching. 1928 */ 1929 || (!tp->t_actout 1930 #ifdef PC98 1931 && !(tmp) 1932 #else 1933 && !(com->prev_modem_status & MSR_DCD) 1934 #endif 1935 && !(tp->t_init_in.c_cflag & CLOCAL)) 1936 || !(tp->t_state & TS_ISOPEN)) { 1937 #ifdef PC98 1938 if (IS_8251(com->pc98_if_type)) 1939 com_tiocm_bic(com, TIOCM_DTR|TIOCM_RTS|TIOCM_LE); 1940 else 1941 #endif 1942 (void)commodem(tp, 0, SER_DTR); 1943 ttydtrwaitstart(tp); 1944 } 1945 #ifdef PC98 1946 else { 1947 if (IS_8251(com->pc98_if_type)) 1948 com_tiocm_bic(com, TIOCM_LE); 1949 } 1950 #endif 1951 } 1952 #ifdef PC98 1953 if (com->pc98_8251fifo) { 1954 if (com->pc98_8251fifo_enable) 1955 outb(I8251F_fcr, FIFO_XMT_RST | FIFO_RCV_RST); 1956 com->pc98_8251fifo_enable = 0; 1957 } 1958 #endif 1959 if (com->hasfifo) { 1960 /* 1961 * Disable fifos so that they are off after controlled 1962 * reboots. Some BIOSes fail to detect 16550s when the 1963 * fifos are enabled. 1964 */ 1965 sio_setreg(com, com_fifo, 0); 1966 } 1967 tp->t_actout = FALSE; 1968 wakeup(&tp->t_actout); 1969 wakeup(TSA_CARR_ON(tp)); /* restart any wopeners */ 1970 siosettimeout(); 1971 splx(s); 1972 } 1973 1974 static void 1975 siobusycheck(chan) 1976 void *chan; 1977 { 1978 struct com_s *com; 1979 int s; 1980 1981 com = (struct com_s *)chan; 1982 1983 /* 1984 * Clear TS_BUSY if low-level output is complete. 1985 * spl locking is sufficient because siointr1() does not set CS_BUSY. 1986 * If siointr1() clears CS_BUSY after we look at it, then we'll get 1987 * called again. Reading the line status port outside of siointr1() 1988 * is safe because CS_BUSY is clear so there are no output interrupts 1989 * to lose. 1990 */ 1991 s = spltty(); 1992 if (com->state & CS_BUSY) 1993 com->extra_state &= ~CSE_BUSYCHECK; /* False alarm. */ 1994 #ifdef PC98 1995 else if ((IS_8251(com->pc98_if_type) && 1996 ((com->pc98_8251fifo_enable && 1997 (inb(I8251F_lsr) & (FLSR_TxRDY | FLSR_TxEMP)) 1998 == (FLSR_TxRDY | FLSR_TxEMP)) || 1999 (!com->pc98_8251fifo_enable && 2000 (inb(com->sts_port) & (STS8251_TxRDY | STS8251_TxEMP)) 2001 == (STS8251_TxRDY | STS8251_TxEMP)))) || 2002 ((inb(com->line_status_port) & (LSR_TSRE | LSR_TXRDY)) 2003 == (LSR_TSRE | LSR_TXRDY))) { 2004 #else 2005 else if ((inb(com->line_status_port) & (LSR_TSRE | LSR_TXRDY)) 2006 == (LSR_TSRE | LSR_TXRDY)) { 2007 #endif 2008 com->tp->t_state &= ~TS_BUSY; 2009 ttwwakeup(com->tp); 2010 com->extra_state &= ~CSE_BUSYCHECK; 2011 } else 2012 timeout(siobusycheck, com, hz / 100); 2013 splx(s); 2014 } 2015 2016 static u_int 2017 siodivisor(rclk, speed) 2018 u_long rclk; 2019 speed_t speed; 2020 { 2021 long actual_speed; 2022 u_int divisor; 2023 int error; 2024 2025 if (speed == 0) 2026 return (0); 2027 #if UINT_MAX > (ULONG_MAX - 1) / 8 2028 if (speed > (ULONG_MAX - 1) / 8) 2029 return (0); 2030 #endif 2031 divisor = (rclk / (8UL * speed) + 1) / 2; 2032 if (divisor == 0 || divisor >= 65536) 2033 return (0); 2034 actual_speed = rclk / (16UL * divisor); 2035 2036 /* 10 times error in percent: */ 2037 error = ((actual_speed - (long)speed) * 2000 / (long)speed + 1) / 2; 2038 2039 /* 3.0% maximum error tolerance: */ 2040 if (error < -30 || error > 30) 2041 return (0); 2042 2043 return (divisor); 2044 } 2045 2046 /* 2047 * Call this function with the sio_lock mutex held. It will return with the 2048 * lock still held. 2049 */ 2050 static void 2051 sioinput(com) 2052 struct com_s *com; 2053 { 2054 u_char *buf; 2055 int incc; 2056 u_char line_status; 2057 int recv_data; 2058 struct tty *tp; 2059 2060 buf = com->ibuf; 2061 tp = com->tp; 2062 if (!(tp->t_state & TS_ISOPEN) || !(tp->t_cflag & CREAD)) { 2063 com_events -= (com->iptr - com->ibuf); 2064 com->iptr = com->ibuf; 2065 return; 2066 } 2067 if (tp->t_state & TS_CAN_BYPASS_L_RINT) { 2068 /* 2069 * Avoid the grotesquely inefficient lineswitch routine 2070 * (ttyinput) in "raw" mode. It usually takes about 450 2071 * instructions (that's without canonical processing or echo!). 2072 * slinput is reasonably fast (usually 40 instructions plus 2073 * call overhead). 2074 */ 2075 do { 2076 /* 2077 * This may look odd, but it is using save-and-enable 2078 * semantics instead of the save-and-disable semantics 2079 * that are used everywhere else. 2080 */ 2081 mtx_unlock_spin(&sio_lock); 2082 incc = com->iptr - buf; 2083 if (tp->t_rawq.c_cc + incc > tp->t_ihiwat 2084 && (com->state & CS_RTS_IFLOW 2085 || tp->t_iflag & IXOFF) 2086 && !(tp->t_state & TS_TBLOCK)) 2087 ttyblock(tp); 2088 com->delta_error_counts[CE_TTY_BUF_OVERFLOW] 2089 += b_to_q((char *)buf, incc, &tp->t_rawq); 2090 buf += incc; 2091 tk_nin += incc; 2092 tk_rawcc += incc; 2093 tp->t_rawcc += incc; 2094 ttwakeup(tp); 2095 if (tp->t_state & TS_TTSTOP 2096 && (tp->t_iflag & IXANY 2097 || tp->t_cc[VSTART] == tp->t_cc[VSTOP])) { 2098 tp->t_state &= ~TS_TTSTOP; 2099 tp->t_lflag &= ~FLUSHO; 2100 comstart(tp); 2101 } 2102 mtx_lock_spin(&sio_lock); 2103 } while (buf < com->iptr); 2104 } else { 2105 do { 2106 /* 2107 * This may look odd, but it is using save-and-enable 2108 * semantics instead of the save-and-disable semantics 2109 * that are used everywhere else. 2110 */ 2111 mtx_unlock_spin(&sio_lock); 2112 line_status = buf[com->ierroff]; 2113 recv_data = *buf++; 2114 if (line_status 2115 & (LSR_BI | LSR_FE | LSR_OE | LSR_PE)) { 2116 if (line_status & LSR_BI) 2117 recv_data |= TTY_BI; 2118 if (line_status & LSR_FE) 2119 recv_data |= TTY_FE; 2120 if (line_status & LSR_OE) 2121 recv_data |= TTY_OE; 2122 if (line_status & LSR_PE) 2123 recv_data |= TTY_PE; 2124 } 2125 ttyld_rint(tp, recv_data); 2126 mtx_lock_spin(&sio_lock); 2127 } while (buf < com->iptr); 2128 } 2129 com_events -= (com->iptr - com->ibuf); 2130 com->iptr = com->ibuf; 2131 2132 /* 2133 * There is now room for another low-level buffer full of input, 2134 * so enable RTS if it is now disabled and there is room in the 2135 * high-level buffer. 2136 */ 2137 #ifdef PC98 2138 if (IS_8251(com->pc98_if_type)) { 2139 if ((com->state & CS_RTS_IFLOW) && 2140 !(com_tiocm_get(com) & TIOCM_RTS) && 2141 !(tp->t_state & TS_TBLOCK)) 2142 com_tiocm_bis(com, TIOCM_RTS); 2143 } else { 2144 if ((com->state & CS_RTS_IFLOW) && 2145 !(com->mcr_image & MCR_RTS) && 2146 !(tp->t_state & TS_TBLOCK)) 2147 outb(com->modem_ctl_port, com->mcr_image |= MCR_RTS); 2148 } 2149 #else 2150 if ((com->state & CS_RTS_IFLOW) && !(com->mcr_image & MCR_RTS) && 2151 !(tp->t_state & TS_TBLOCK)) 2152 outb(com->modem_ctl_port, com->mcr_image |= MCR_RTS); 2153 #endif 2154 } 2155 2156 static int 2157 siointr(arg) 2158 void *arg; 2159 { 2160 struct com_s *com; 2161 #if defined(PC98) && defined(COM_MULTIPORT) 2162 u_char rsa_buf_status; 2163 #endif 2164 2165 #ifndef COM_MULTIPORT 2166 com = (struct com_s *)arg; 2167 2168 mtx_lock_spin(&sio_lock); 2169 siointr1(com); 2170 mtx_unlock_spin(&sio_lock); 2171 #else /* COM_MULTIPORT */ 2172 bool_t possibly_more_intrs; 2173 int unit; 2174 2175 /* 2176 * Loop until there is no activity on any port. This is necessary 2177 * to get an interrupt edge more than to avoid another interrupt. 2178 * If the IRQ signal is just an OR of the IRQ signals from several 2179 * devices, then the edge from one may be lost because another is 2180 * on. 2181 */ 2182 mtx_lock_spin(&sio_lock); 2183 do { 2184 possibly_more_intrs = FALSE; 2185 for (unit = 0; unit < sio_numunits; ++unit) { 2186 com = com_addr(unit); 2187 /* 2188 * XXX COM_LOCK(); 2189 * would it work here, or be counter-productive? 2190 */ 2191 #ifdef PC98 2192 if (com != NULL 2193 && !com->gone 2194 && IS_8251(com->pc98_if_type)) { 2195 siointr1(com); 2196 } else if (com != NULL 2197 && !com->gone 2198 && com->pc98_if_type == COM_IF_RSA98III) { 2199 rsa_buf_status = 2200 inb(com->rsabase + rsa_srr) & 0xc9; 2201 if ((rsa_buf_status & 0xc8) 2202 || !(rsa_buf_status & 0x01)) { 2203 siointr1(com); 2204 if (rsa_buf_status != 2205 (inb(com->rsabase + rsa_srr) & 0xc9)) 2206 possibly_more_intrs = TRUE; 2207 } 2208 } else 2209 #endif 2210 if (com != NULL 2211 && !com->gone 2212 && (inb(com->int_id_port) & IIR_IMASK) 2213 != IIR_NOPEND) { 2214 siointr1(com); 2215 possibly_more_intrs = TRUE; 2216 } 2217 /* XXX COM_UNLOCK(); */ 2218 } 2219 } while (possibly_more_intrs); 2220 mtx_unlock_spin(&sio_lock); 2221 #endif /* COM_MULTIPORT */ 2222 return (FILTER_HANDLED); 2223 } 2224 2225 static struct timespec siots[8]; 2226 static int siotso; 2227 static int volatile siotsunit = -1; 2228 2229 static int 2230 sysctl_siots(SYSCTL_HANDLER_ARGS) 2231 { 2232 char buf[128]; 2233 long long delta; 2234 size_t len; 2235 int error, i, tso; 2236 2237 for (i = 1, tso = siotso; i < tso; i++) { 2238 delta = (long long)(siots[i].tv_sec - siots[i - 1].tv_sec) * 2239 1000000000 + 2240 (siots[i].tv_nsec - siots[i - 1].tv_nsec); 2241 len = sprintf(buf, "%lld\n", delta); 2242 if (delta >= 110000) 2243 len += sprintf(buf + len - 1, ": *** %ld.%09ld\n", 2244 (long)siots[i].tv_sec, siots[i].tv_nsec) - 1; 2245 if (i == tso - 1) 2246 buf[len - 1] = '\0'; 2247 error = SYSCTL_OUT(req, buf, len); 2248 if (error != 0) 2249 return (error); 2250 } 2251 return (0); 2252 } 2253 2254 SYSCTL_PROC(_machdep, OID_AUTO, siots, CTLTYPE_STRING | CTLFLAG_RD, 2255 0, 0, sysctl_siots, "A", "sio timestamps"); 2256 2257 static void 2258 siointr1(com) 2259 struct com_s *com; 2260 { 2261 u_char int_ctl; 2262 u_char int_ctl_new; 2263 u_char line_status; 2264 u_char modem_status; 2265 u_char *ioptr; 2266 u_char recv_data; 2267 #ifdef PC98 2268 u_char tmp = 0; 2269 u_char rsa_buf_status = 0; 2270 int rsa_tx_fifo_size = 0; 2271 #endif /* PC98 */ 2272 #if defined(KDB) 2273 int kdb_brk; 2274 2275 again: 2276 #endif 2277 2278 if (COM_IIR_TXRDYBUG(com->flags)) { 2279 int_ctl = inb(com->int_ctl_port); 2280 int_ctl_new = int_ctl; 2281 } else { 2282 int_ctl = 0; 2283 int_ctl_new = 0; 2284 } 2285 2286 while (!com->gone) { 2287 #ifdef PC98 2288 status_read:; 2289 if (IS_8251(com->pc98_if_type)) { 2290 if (com->pc98_8251fifo_enable) 2291 tmp = inb(I8251F_lsr); 2292 else 2293 tmp = inb(com->sts_port); 2294 more_intr: 2295 line_status = 0; 2296 if (com->pc98_8251fifo_enable) { 2297 if (tmp & FLSR_TxRDY) line_status |= LSR_TXRDY; 2298 if (tmp & FLSR_RxRDY) line_status |= LSR_RXRDY; 2299 if (tmp & FLSR_TxEMP) line_status |= LSR_TSRE; 2300 if (tmp & FLSR_PE) line_status |= LSR_PE; 2301 if (tmp & FLSR_OE) line_status |= LSR_OE; 2302 if (tmp & FLSR_BI) line_status |= LSR_BI; 2303 } else { 2304 if (tmp & STS8251_TxRDY) line_status |= LSR_TXRDY; 2305 if (tmp & STS8251_RxRDY) line_status |= LSR_RXRDY; 2306 if (tmp & STS8251_TxEMP) line_status |= LSR_TSRE; 2307 if (tmp & STS8251_PE) line_status |= LSR_PE; 2308 if (tmp & STS8251_OE) line_status |= LSR_OE; 2309 if (tmp & STS8251_FE) line_status |= LSR_FE; 2310 if (tmp & STS8251_BI) line_status |= LSR_BI; 2311 } 2312 } else { 2313 #endif /* PC98 */ 2314 if (com->pps.ppsparam.mode & PPS_CAPTUREBOTH) { 2315 modem_status = inb(com->modem_status_port); 2316 if ((modem_status ^ com->last_modem_status) & 2317 com->pps_bit) { 2318 pps_capture(&com->pps); 2319 pps_event(&com->pps, 2320 (modem_status & com->pps_bit) ? 2321 PPS_CAPTUREASSERT : PPS_CAPTURECLEAR); 2322 } 2323 } 2324 line_status = inb(com->line_status_port); 2325 #ifdef PC98 2326 } 2327 if (com->pc98_if_type == COM_IF_RSA98III) 2328 rsa_buf_status = inb(com->rsabase + rsa_srr); 2329 #endif /* PC98 */ 2330 2331 /* input event? (check first to help avoid overruns) */ 2332 #ifndef PC98 2333 while (line_status & LSR_RCV_MASK) { 2334 #else 2335 while ((line_status & LSR_RCV_MASK) 2336 || (com->pc98_if_type == COM_IF_RSA98III 2337 && (rsa_buf_status & 0x08))) { 2338 #endif /* PC98 */ 2339 /* break/unnattached error bits or real input? */ 2340 #ifdef PC98 2341 if (IS_8251(com->pc98_if_type)) { 2342 if (com->pc98_8251fifo_enable) { 2343 recv_data = inb(I8251F_data); 2344 if (tmp & 2345 (FLSR_PE | FLSR_OE | FLSR_BI)) { 2346 pc98_i8251_or_cmd(com, CMD8251_ER); 2347 recv_data = 0; 2348 } 2349 } else { 2350 recv_data = inb(com->data_port); 2351 if (tmp & (STS8251_PE | STS8251_OE | 2352 STS8251_FE | STS8251_BI)) { 2353 pc98_i8251_or_cmd(com, CMD8251_ER); 2354 recv_data = 0; 2355 } 2356 } 2357 } else if (com->pc98_if_type == COM_IF_RSA98III) { 2358 if (!(rsa_buf_status & 0x08)) 2359 recv_data = 0; 2360 else 2361 recv_data = inb(com->data_port); 2362 } else 2363 #endif 2364 if (!(line_status & LSR_RXRDY)) 2365 recv_data = 0; 2366 else 2367 recv_data = inb(com->data_port); 2368 #ifdef KDB 2369 if (com->unit == comconsole && 2370 (kdb_brk = kdb_alt_break(recv_data, 2371 &com->alt_brk_state)) != 0) { 2372 goto again; 2373 } 2374 #endif /* KDB */ 2375 if (line_status & (LSR_BI | LSR_FE | LSR_PE)) { 2376 /* 2377 * Don't store BI if IGNBRK or FE/PE if IGNPAR. 2378 * Otherwise, push the work to a higher level 2379 * (to handle PARMRK) if we're bypassing. 2380 * Otherwise, convert BI/FE and PE+INPCK to 0. 2381 * 2382 * This makes bypassing work right in the 2383 * usual "raw" case (IGNBRK set, and IGNPAR 2384 * and INPCK clear). 2385 * 2386 * Note: BI together with FE/PE means just BI. 2387 */ 2388 if (line_status & LSR_BI) { 2389 #if defined(KDB) 2390 if (com->unit == comconsole) { 2391 kdb_enter(KDB_WHY_BREAK, 2392 "Line break on console"); 2393 goto cont; 2394 } 2395 #endif 2396 if (com->tp == NULL 2397 || com->tp->t_iflag & IGNBRK) 2398 goto cont; 2399 } else { 2400 if (com->tp == NULL 2401 || com->tp->t_iflag & IGNPAR) 2402 goto cont; 2403 } 2404 if (com->tp->t_state & TS_CAN_BYPASS_L_RINT 2405 && (line_status & (LSR_BI | LSR_FE) 2406 || com->tp->t_iflag & INPCK)) 2407 recv_data = 0; 2408 } 2409 ++com->bytes_in; 2410 if (com->tp != NULL && 2411 com->tp->t_hotchar != 0 && recv_data == com->tp->t_hotchar) 2412 swi_sched(sio_fast_ih, 0); 2413 ioptr = com->iptr; 2414 if (ioptr >= com->ibufend) 2415 CE_RECORD(com, CE_INTERRUPT_BUF_OVERFLOW); 2416 else { 2417 if (com->tp != NULL && com->tp->t_do_timestamp) 2418 microtime(&com->tp->t_timestamp); 2419 ++com_events; 2420 swi_sched(sio_slow_ih, SWI_DELAY); 2421 #if 0 /* for testing input latency vs efficiency */ 2422 if (com->iptr - com->ibuf == 8) 2423 swi_sched(sio_fast_ih, 0); 2424 #endif 2425 ioptr[0] = recv_data; 2426 ioptr[com->ierroff] = line_status; 2427 com->iptr = ++ioptr; 2428 if (ioptr == com->ihighwater 2429 && com->state & CS_RTS_IFLOW) 2430 #ifdef PC98 2431 IS_8251(com->pc98_if_type) ? 2432 com_tiocm_bic(com, TIOCM_RTS) : 2433 #endif 2434 outb(com->modem_ctl_port, 2435 com->mcr_image &= ~MCR_RTS); 2436 if (line_status & LSR_OE) 2437 CE_RECORD(com, CE_OVERRUN); 2438 } 2439 cont: 2440 if (line_status & LSR_TXRDY 2441 && com->state >= (CS_BUSY | CS_TTGO | CS_ODEVREADY)) 2442 goto txrdy; 2443 2444 /* 2445 * "& 0x7F" is to avoid the gcc-1.40 generating a slow 2446 * jump from the top of the loop to here 2447 */ 2448 #ifdef PC98 2449 if (IS_8251(com->pc98_if_type)) 2450 goto status_read; 2451 else 2452 #endif 2453 line_status = inb(com->line_status_port) & 0x7F; 2454 #ifdef PC98 2455 if (com->pc98_if_type == COM_IF_RSA98III) 2456 rsa_buf_status = inb(com->rsabase + rsa_srr); 2457 #endif /* PC98 */ 2458 } 2459 2460 /* modem status change? (always check before doing output) */ 2461 #ifdef PC98 2462 if (!IS_8251(com->pc98_if_type)) { 2463 #endif 2464 modem_status = inb(com->modem_status_port); 2465 if (modem_status != com->last_modem_status) { 2466 /* 2467 * Schedule high level to handle DCD changes. Note 2468 * that we don't use the delta bits anywhere. Some 2469 * UARTs mess them up, and it's easy to remember the 2470 * previous bits and calculate the delta. 2471 */ 2472 com->last_modem_status = modem_status; 2473 if (!(com->state & CS_CHECKMSR)) { 2474 com_events += LOTS_OF_EVENTS; 2475 com->state |= CS_CHECKMSR; 2476 swi_sched(sio_fast_ih, 0); 2477 } 2478 2479 /* handle CTS change immediately for crisp flow ctl */ 2480 if (com->state & CS_CTS_OFLOW) { 2481 if (modem_status & MSR_CTS) 2482 com->state |= CS_ODEVREADY; 2483 else 2484 com->state &= ~CS_ODEVREADY; 2485 } 2486 } 2487 #ifdef PC98 2488 } 2489 #endif 2490 2491 txrdy: 2492 /* output queued and everything ready? */ 2493 #ifndef PC98 2494 if (line_status & LSR_TXRDY 2495 && com->state >= (CS_BUSY | CS_TTGO | CS_ODEVREADY)) { 2496 #else 2497 if (((com->pc98_if_type == COM_IF_RSA98III) 2498 ? (rsa_buf_status & 0x02) 2499 : (line_status & LSR_TXRDY)) 2500 && com->state >= (CS_BUSY | CS_TTGO | CS_ODEVREADY)) { 2501 #endif 2502 #ifdef PC98 2503 Port_t tmp_data_port; 2504 2505 if (IS_8251(com->pc98_if_type) && 2506 com->pc98_8251fifo_enable) 2507 tmp_data_port = I8251F_data; 2508 else 2509 tmp_data_port = com->data_port; 2510 #endif 2511 2512 ioptr = com->obufq.l_head; 2513 if (com->tx_fifo_size > 1 && com->unit != siotsunit) { 2514 u_int ocount; 2515 2516 ocount = com->obufq.l_tail - ioptr; 2517 #ifdef PC98 2518 if (com->pc98_if_type == COM_IF_RSA98III) { 2519 rsa_buf_status = inb(com->rsabase + rsa_srr); 2520 rsa_tx_fifo_size = 1024; 2521 if (!(rsa_buf_status & 0x01)) 2522 rsa_tx_fifo_size = 2048; 2523 if (ocount > rsa_tx_fifo_size) 2524 ocount = rsa_tx_fifo_size; 2525 } else 2526 #endif 2527 if (ocount > com->tx_fifo_size) 2528 ocount = com->tx_fifo_size; 2529 com->bytes_out += ocount; 2530 do 2531 #ifdef PC98 2532 outb(tmp_data_port, *ioptr++); 2533 #else 2534 outb(com->data_port, *ioptr++); 2535 #endif 2536 while (--ocount != 0); 2537 } else { 2538 #ifdef PC98 2539 outb(tmp_data_port, *ioptr++); 2540 #else 2541 outb(com->data_port, *ioptr++); 2542 #endif 2543 ++com->bytes_out; 2544 if (com->unit == siotsunit 2545 && siotso < sizeof siots / sizeof siots[0]) 2546 nanouptime(&siots[siotso++]); 2547 } 2548 #ifdef PC98 2549 if (IS_8251(com->pc98_if_type)) 2550 if (!(pc98_check_i8251_interrupt(com) & IEN_TxFLAG)) 2551 com_int_Tx_enable(com); 2552 #endif 2553 com->obufq.l_head = ioptr; 2554 if (COM_IIR_TXRDYBUG(com->flags)) 2555 int_ctl_new = int_ctl | IER_ETXRDY; 2556 if (ioptr >= com->obufq.l_tail) { 2557 struct lbq *qp; 2558 2559 qp = com->obufq.l_next; 2560 qp->l_queued = FALSE; 2561 qp = qp->l_next; 2562 if (qp != NULL) { 2563 com->obufq.l_head = qp->l_head; 2564 com->obufq.l_tail = qp->l_tail; 2565 com->obufq.l_next = qp; 2566 } else { 2567 /* output just completed */ 2568 if (COM_IIR_TXRDYBUG(com->flags)) 2569 int_ctl_new = int_ctl 2570 & ~IER_ETXRDY; 2571 com->state &= ~CS_BUSY; 2572 #if defined(PC98) 2573 if (IS_8251(com->pc98_if_type) && 2574 pc98_check_i8251_interrupt(com) & IEN_TxFLAG) 2575 com_int_Tx_disable(com); 2576 #endif 2577 } 2578 if (!(com->state & CS_ODONE)) { 2579 com_events += LOTS_OF_EVENTS; 2580 com->state |= CS_ODONE; 2581 /* handle at high level ASAP */ 2582 swi_sched(sio_fast_ih, 0); 2583 } 2584 } 2585 #ifdef PC98 2586 if (COM_IIR_TXRDYBUG(com->flags) 2587 && int_ctl != int_ctl_new) { 2588 if (com->pc98_if_type == COM_IF_RSA98III) { 2589 int_ctl_new &= ~(IER_ETXRDY | IER_ERXRDY); 2590 outb(com->int_ctl_port, int_ctl_new); 2591 outb(com->rsabase + rsa_ier, 0x1d); 2592 } else 2593 outb(com->int_ctl_port, int_ctl_new); 2594 } 2595 #else 2596 if (COM_IIR_TXRDYBUG(com->flags) 2597 && int_ctl != int_ctl_new) 2598 outb(com->int_ctl_port, int_ctl_new); 2599 #endif 2600 } 2601 #ifdef PC98 2602 else if (line_status & LSR_TXRDY) { 2603 if (IS_8251(com->pc98_if_type)) 2604 if (pc98_check_i8251_interrupt(com) & IEN_TxFLAG) 2605 com_int_Tx_disable(com); 2606 } 2607 if (IS_8251(com->pc98_if_type)) { 2608 if (com->pc98_8251fifo_enable) { 2609 if ((tmp = inb(I8251F_lsr)) & FLSR_RxRDY) 2610 goto more_intr; 2611 } else { 2612 if ((tmp = inb(com->sts_port)) & STS8251_RxRDY) 2613 goto more_intr; 2614 } 2615 } 2616 #endif 2617 2618 /* finished? */ 2619 #ifndef COM_MULTIPORT 2620 #ifdef PC98 2621 if (IS_8251(com->pc98_if_type)) 2622 return; 2623 #endif 2624 if ((inb(com->int_id_port) & IIR_IMASK) == IIR_NOPEND) 2625 #endif /* COM_MULTIPORT */ 2626 return; 2627 } 2628 } 2629 2630 /* software interrupt handler for SWI_TTY */ 2631 static void 2632 siopoll(void *dummy) 2633 { 2634 int unit; 2635 2636 if (com_events == 0) 2637 return; 2638 repeat: 2639 for (unit = 0; unit < sio_numunits; ++unit) { 2640 struct com_s *com; 2641 int incc; 2642 struct tty *tp; 2643 2644 com = com_addr(unit); 2645 if (com == NULL) 2646 continue; 2647 tp = com->tp; 2648 if (tp == NULL || com->gone) { 2649 /* 2650 * Discard any events related to never-opened or 2651 * going-away devices. 2652 */ 2653 mtx_lock_spin(&sio_lock); 2654 incc = com->iptr - com->ibuf; 2655 com->iptr = com->ibuf; 2656 if (com->state & CS_CHECKMSR) { 2657 incc += LOTS_OF_EVENTS; 2658 com->state &= ~CS_CHECKMSR; 2659 } 2660 com_events -= incc; 2661 mtx_unlock_spin(&sio_lock); 2662 continue; 2663 } 2664 if (com->iptr != com->ibuf) { 2665 mtx_lock_spin(&sio_lock); 2666 sioinput(com); 2667 mtx_unlock_spin(&sio_lock); 2668 } 2669 if (com->state & CS_CHECKMSR) { 2670 u_char delta_modem_status; 2671 2672 #ifdef PC98 2673 if (!IS_8251(com->pc98_if_type)) { 2674 #endif 2675 mtx_lock_spin(&sio_lock); 2676 delta_modem_status = com->last_modem_status 2677 ^ com->prev_modem_status; 2678 com->prev_modem_status = com->last_modem_status; 2679 com_events -= LOTS_OF_EVENTS; 2680 com->state &= ~CS_CHECKMSR; 2681 mtx_unlock_spin(&sio_lock); 2682 if (delta_modem_status & MSR_DCD) 2683 ttyld_modem(tp, 2684 com->prev_modem_status & MSR_DCD); 2685 #ifdef PC98 2686 } 2687 #endif 2688 } 2689 if (com->state & CS_ODONE) { 2690 mtx_lock_spin(&sio_lock); 2691 com_events -= LOTS_OF_EVENTS; 2692 com->state &= ~CS_ODONE; 2693 mtx_unlock_spin(&sio_lock); 2694 if (!(com->state & CS_BUSY) 2695 && !(com->extra_state & CSE_BUSYCHECK)) { 2696 timeout(siobusycheck, com, hz / 100); 2697 com->extra_state |= CSE_BUSYCHECK; 2698 } 2699 ttyld_start(tp); 2700 } 2701 if (com_events == 0) 2702 break; 2703 } 2704 if (com_events >= LOTS_OF_EVENTS) 2705 goto repeat; 2706 } 2707 2708 static void 2709 combreak(tp, sig) 2710 struct tty *tp; 2711 int sig; 2712 { 2713 struct com_s *com; 2714 2715 com = tp->t_sc; 2716 2717 #ifdef PC98 2718 if (sig) 2719 com_send_break_on(com); 2720 else 2721 com_send_break_off(com); 2722 #else 2723 if (sig) 2724 sio_setreg(com, com_cfcr, com->cfcr_image |= CFCR_SBREAK); 2725 else 2726 sio_setreg(com, com_cfcr, com->cfcr_image &= ~CFCR_SBREAK); 2727 #endif 2728 } 2729 2730 static int 2731 comparam(tp, t) 2732 struct tty *tp; 2733 struct termios *t; 2734 { 2735 u_int cfcr; 2736 int cflag; 2737 struct com_s *com; 2738 u_int divisor; 2739 u_char dlbh; 2740 u_char dlbl; 2741 u_char efr_flowbits; 2742 int s; 2743 #ifdef PC98 2744 u_char param = 0; 2745 #endif 2746 2747 com = tp->t_sc; 2748 if (com == NULL) 2749 return (ENODEV); 2750 2751 #ifdef PC98 2752 cfcr = 0; 2753 2754 if (IS_8251(com->pc98_if_type)) { 2755 if (pc98_ttspeedtab(com, t->c_ospeed, &divisor) != 0) 2756 return (EINVAL); 2757 } else { 2758 #endif 2759 /* check requested parameters */ 2760 if (t->c_ispeed != (t->c_ospeed != 0 ? t->c_ospeed : tp->t_ospeed)) 2761 return (EINVAL); 2762 divisor = siodivisor(com->rclk, t->c_ispeed); 2763 if (divisor == 0) 2764 return (EINVAL); 2765 #ifdef PC98 2766 } 2767 #endif 2768 2769 /* parameters are OK, convert them to the com struct and the device */ 2770 s = spltty(); 2771 #ifdef PC98 2772 if (IS_8251(com->pc98_if_type)) { 2773 if (t->c_ospeed == 0) 2774 com_tiocm_bic(com, TIOCM_DTR|TIOCM_RTS|TIOCM_LE); 2775 else 2776 com_tiocm_bis(com, TIOCM_DTR|TIOCM_RTS|TIOCM_LE); 2777 } else 2778 #endif 2779 if (t->c_ospeed == 0) 2780 (void)commodem(tp, 0, SER_DTR); /* hang up line */ 2781 else 2782 (void)commodem(tp, SER_DTR, 0); 2783 cflag = t->c_cflag; 2784 #ifdef PC98 2785 if (!IS_8251(com->pc98_if_type)) { 2786 #endif 2787 switch (cflag & CSIZE) { 2788 case CS5: 2789 cfcr = CFCR_5BITS; 2790 break; 2791 case CS6: 2792 cfcr = CFCR_6BITS; 2793 break; 2794 case CS7: 2795 cfcr = CFCR_7BITS; 2796 break; 2797 default: 2798 cfcr = CFCR_8BITS; 2799 break; 2800 } 2801 if (cflag & PARENB) { 2802 cfcr |= CFCR_PENAB; 2803 if (!(cflag & PARODD)) 2804 cfcr |= CFCR_PEVEN; 2805 } 2806 if (cflag & CSTOPB) 2807 cfcr |= CFCR_STOPB; 2808 2809 if (com->hasfifo) { 2810 /* 2811 * Use a fifo trigger level low enough so that the input 2812 * latency from the fifo is less than about 16 msec and 2813 * the total latency is less than about 30 msec. These 2814 * latencies are reasonable for humans. Serial comms 2815 * protocols shouldn't expect anything better since modem 2816 * latencies are larger. 2817 * 2818 * The fifo trigger level cannot be set at RX_HIGH for high 2819 * speed connections without further work on reducing 2820 * interrupt disablement times in other parts of the system, 2821 * without producing silo overflow errors. 2822 */ 2823 com->fifo_image = com->unit == siotsunit ? 0 2824 : t->c_ispeed <= 4800 2825 ? FIFO_ENABLE : FIFO_ENABLE | FIFO_RX_MEDH; 2826 #ifdef COM_ESP 2827 /* 2828 * The Hayes ESP card needs the fifo DMA mode bit set 2829 * in compatibility mode. If not, it will interrupt 2830 * for each character received. 2831 */ 2832 if (com->esp) 2833 com->fifo_image |= FIFO_DMA_MODE; 2834 #endif 2835 sio_setreg(com, com_fifo, com->fifo_image); 2836 } 2837 #ifdef PC98 2838 } 2839 #endif 2840 2841 /* 2842 * This returns with interrupts disabled so that we can complete 2843 * the speed change atomically. Keeping interrupts disabled is 2844 * especially important while com_data is hidden. 2845 */ 2846 (void) siosetwater(com, t->c_ispeed); 2847 2848 #ifdef PC98 2849 if (IS_8251(com->pc98_if_type)) 2850 com_cflag_and_speed_set(com, cflag, t->c_ospeed); 2851 else { 2852 #endif 2853 sio_setreg(com, com_cfcr, cfcr | CFCR_DLAB); 2854 /* 2855 * Only set the divisor registers if they would change, since on 2856 * some 16550 incompatibles (UMC8669F), setting them while input 2857 * is arriving loses sync until data stops arriving. 2858 */ 2859 dlbl = divisor & 0xFF; 2860 if (sio_getreg(com, com_dlbl) != dlbl) 2861 sio_setreg(com, com_dlbl, dlbl); 2862 dlbh = divisor >> 8; 2863 if (sio_getreg(com, com_dlbh) != dlbh) 2864 sio_setreg(com, com_dlbh, dlbh); 2865 #ifdef PC98 2866 } 2867 #endif 2868 2869 efr_flowbits = 0; 2870 2871 if (cflag & CRTS_IFLOW) { 2872 com->state |= CS_RTS_IFLOW; 2873 efr_flowbits |= EFR_AUTORTS; 2874 /* 2875 * If CS_RTS_IFLOW just changed from off to on, the change 2876 * needs to be propagated to MCR_RTS. This isn't urgent, 2877 * so do it later by calling comstart() instead of repeating 2878 * a lot of code from comstart() here. 2879 */ 2880 } else if (com->state & CS_RTS_IFLOW) { 2881 com->state &= ~CS_RTS_IFLOW; 2882 /* 2883 * CS_RTS_IFLOW just changed from on to off. Force MCR_RTS 2884 * on here, since comstart() won't do it later. 2885 */ 2886 #ifdef PC98 2887 if (IS_8251(com->pc98_if_type)) 2888 com_tiocm_bis(com, TIOCM_RTS); 2889 else 2890 outb(com->modem_ctl_port, com->mcr_image |= MCR_RTS); 2891 #else 2892 outb(com->modem_ctl_port, com->mcr_image |= MCR_RTS); 2893 #endif 2894 } 2895 2896 /* 2897 * Set up state to handle output flow control. 2898 * XXX - worth handling MDMBUF (DCD) flow control at the lowest level? 2899 * Now has 10+ msec latency, while CTS flow has 50- usec latency. 2900 */ 2901 com->state |= CS_ODEVREADY; 2902 com->state &= ~CS_CTS_OFLOW; 2903 #ifdef PC98 2904 if (com->pc98_if_type == COM_IF_RSA98III) { 2905 param = inb(com->rsabase + rsa_msr); 2906 outb(com->rsabase + rsa_msr, param & 0x14); 2907 } 2908 #endif 2909 if (cflag & CCTS_OFLOW) { 2910 com->state |= CS_CTS_OFLOW; 2911 efr_flowbits |= EFR_AUTOCTS; 2912 #ifdef PC98 2913 if (IS_8251(com->pc98_if_type)) { 2914 if (!(pc98_get_modem_status(com) & TIOCM_CTS)) 2915 com->state &= ~CS_ODEVREADY; 2916 } else if (com->pc98_if_type == COM_IF_RSA98III) { 2917 /* Set automatic flow control mode */ 2918 outb(com->rsabase + rsa_msr, param | 0x08); 2919 } else 2920 #endif 2921 if (!(com->last_modem_status & MSR_CTS)) 2922 com->state &= ~CS_ODEVREADY; 2923 } 2924 2925 #ifdef PC98 2926 if (!IS_8251(com->pc98_if_type)) 2927 sio_setreg(com, com_cfcr, com->cfcr_image = cfcr); 2928 #else 2929 if (com->st16650a) { 2930 sio_setreg(com, com_lcr, LCR_EFR_ENABLE); 2931 sio_setreg(com, com_efr, 2932 (sio_getreg(com, com_efr) 2933 & ~(EFR_AUTOCTS | EFR_AUTORTS)) | efr_flowbits); 2934 } 2935 sio_setreg(com, com_cfcr, com->cfcr_image = cfcr); 2936 #endif 2937 2938 /* XXX shouldn't call functions while intrs are disabled. */ 2939 ttyldoptim(tp); 2940 2941 mtx_unlock_spin(&sio_lock); 2942 splx(s); 2943 comstart(tp); 2944 if (com->ibufold != NULL) { 2945 free(com->ibufold, M_DEVBUF); 2946 com->ibufold = NULL; 2947 } 2948 return (0); 2949 } 2950 2951 /* 2952 * This function must be called with the sio_lock mutex released and will 2953 * return with it obtained. 2954 */ 2955 static int 2956 siosetwater(com, speed) 2957 struct com_s *com; 2958 speed_t speed; 2959 { 2960 int cp4ticks; 2961 u_char *ibuf; 2962 int ibufsize; 2963 struct tty *tp; 2964 2965 /* 2966 * Make the buffer size large enough to handle a softtty interrupt 2967 * latency of about 2 ticks without loss of throughput or data 2968 * (about 3 ticks if input flow control is not used or not honoured, 2969 * but a bit less for CS5-CS7 modes). 2970 */ 2971 cp4ticks = speed / 10 / hz * 4; 2972 for (ibufsize = 128; ibufsize < cp4ticks;) 2973 ibufsize <<= 1; 2974 #ifdef PC98 2975 if (com->pc98_if_type == COM_IF_RSA98III) 2976 ibufsize = 2048; 2977 #endif 2978 if (ibufsize == com->ibufsize) { 2979 mtx_lock_spin(&sio_lock); 2980 return (0); 2981 } 2982 2983 /* 2984 * Allocate input buffer. The extra factor of 2 in the size is 2985 * to allow for an error byte for each input byte. 2986 */ 2987 ibuf = malloc(2 * ibufsize, M_DEVBUF, M_NOWAIT); 2988 if (ibuf == NULL) { 2989 mtx_lock_spin(&sio_lock); 2990 return (ENOMEM); 2991 } 2992 2993 /* Initialize non-critical variables. */ 2994 com->ibufold = com->ibuf; 2995 com->ibufsize = ibufsize; 2996 tp = com->tp; 2997 if (tp != NULL) { 2998 tp->t_ififosize = 2 * ibufsize; 2999 tp->t_ispeedwat = (speed_t)-1; 3000 tp->t_ospeedwat = (speed_t)-1; 3001 } 3002 3003 /* 3004 * Read current input buffer, if any. Continue with interrupts 3005 * disabled. 3006 */ 3007 mtx_lock_spin(&sio_lock); 3008 if (com->iptr != com->ibuf) 3009 sioinput(com); 3010 3011 /*- 3012 * Initialize critical variables, including input buffer watermarks. 3013 * The external device is asked to stop sending when the buffer 3014 * exactly reaches high water, or when the high level requests it. 3015 * The high level is notified immediately (rather than at a later 3016 * clock tick) when this watermark is reached. 3017 * The buffer size is chosen so the watermark should almost never 3018 * be reached. 3019 * The low watermark is invisibly 0 since the buffer is always 3020 * emptied all at once. 3021 */ 3022 com->iptr = com->ibuf = ibuf; 3023 com->ibufend = ibuf + ibufsize; 3024 com->ierroff = ibufsize; 3025 com->ihighwater = ibuf + 3 * ibufsize / 4; 3026 return (0); 3027 } 3028 3029 static void 3030 comstart(tp) 3031 struct tty *tp; 3032 { 3033 struct com_s *com; 3034 int s; 3035 3036 com = tp->t_sc; 3037 if (com == NULL) 3038 return; 3039 s = spltty(); 3040 mtx_lock_spin(&sio_lock); 3041 if (tp->t_state & TS_TTSTOP) 3042 com->state &= ~CS_TTGO; 3043 else 3044 com->state |= CS_TTGO; 3045 if (tp->t_state & TS_TBLOCK) { 3046 #ifdef PC98 3047 if (IS_8251(com->pc98_if_type)) { 3048 if ((com_tiocm_get(com) & TIOCM_RTS) && 3049 (com->state & CS_RTS_IFLOW)) 3050 com_tiocm_bic(com, TIOCM_RTS); 3051 } else { 3052 if ((com->mcr_image & MCR_RTS) && 3053 (com->state & CS_RTS_IFLOW)) 3054 outb(com->modem_ctl_port, com->mcr_image &= ~MCR_RTS); 3055 } 3056 #else 3057 if (com->mcr_image & MCR_RTS && com->state & CS_RTS_IFLOW) 3058 outb(com->modem_ctl_port, com->mcr_image &= ~MCR_RTS); 3059 #endif 3060 } else { 3061 #ifdef PC98 3062 if (IS_8251(com->pc98_if_type)) { 3063 if (!(com_tiocm_get(com) & TIOCM_RTS) && 3064 com->iptr < com->ihighwater && 3065 com->state & CS_RTS_IFLOW) 3066 com_tiocm_bis(com, TIOCM_RTS); 3067 } else { 3068 if (!(com->mcr_image & MCR_RTS) && 3069 com->iptr < com->ihighwater && 3070 com->state & CS_RTS_IFLOW) 3071 outb(com->modem_ctl_port, com->mcr_image |= MCR_RTS); 3072 } 3073 #else 3074 if (!(com->mcr_image & MCR_RTS) && com->iptr < com->ihighwater 3075 && com->state & CS_RTS_IFLOW) 3076 outb(com->modem_ctl_port, com->mcr_image |= MCR_RTS); 3077 #endif 3078 } 3079 mtx_unlock_spin(&sio_lock); 3080 if (tp->t_state & (TS_TIMEOUT | TS_TTSTOP)) { 3081 ttwwakeup(tp); 3082 splx(s); 3083 return; 3084 } 3085 if (tp->t_outq.c_cc != 0) { 3086 struct lbq *qp; 3087 struct lbq *next; 3088 3089 if (!com->obufs[0].l_queued) { 3090 com->obufs[0].l_tail 3091 = com->obuf1 + q_to_b(&tp->t_outq, com->obuf1, 3092 #ifdef PC98 3093 com->obufsize); 3094 #else 3095 sizeof com->obuf1); 3096 #endif 3097 com->obufs[0].l_next = NULL; 3098 com->obufs[0].l_queued = TRUE; 3099 mtx_lock_spin(&sio_lock); 3100 if (com->state & CS_BUSY) { 3101 qp = com->obufq.l_next; 3102 while ((next = qp->l_next) != NULL) 3103 qp = next; 3104 qp->l_next = &com->obufs[0]; 3105 } else { 3106 com->obufq.l_head = com->obufs[0].l_head; 3107 com->obufq.l_tail = com->obufs[0].l_tail; 3108 com->obufq.l_next = &com->obufs[0]; 3109 com->state |= CS_BUSY; 3110 } 3111 mtx_unlock_spin(&sio_lock); 3112 } 3113 if (tp->t_outq.c_cc != 0 && !com->obufs[1].l_queued) { 3114 com->obufs[1].l_tail 3115 = com->obuf2 + q_to_b(&tp->t_outq, com->obuf2, 3116 #ifdef PC98 3117 com->obufsize); 3118 #else 3119 sizeof com->obuf2); 3120 #endif 3121 com->obufs[1].l_next = NULL; 3122 com->obufs[1].l_queued = TRUE; 3123 mtx_lock_spin(&sio_lock); 3124 if (com->state & CS_BUSY) { 3125 qp = com->obufq.l_next; 3126 while ((next = qp->l_next) != NULL) 3127 qp = next; 3128 qp->l_next = &com->obufs[1]; 3129 } else { 3130 com->obufq.l_head = com->obufs[1].l_head; 3131 com->obufq.l_tail = com->obufs[1].l_tail; 3132 com->obufq.l_next = &com->obufs[1]; 3133 com->state |= CS_BUSY; 3134 } 3135 mtx_unlock_spin(&sio_lock); 3136 } 3137 tp->t_state |= TS_BUSY; 3138 } 3139 mtx_lock_spin(&sio_lock); 3140 if (com->state >= (CS_BUSY | CS_TTGO)) 3141 siointr1(com); /* fake interrupt to start output */ 3142 mtx_unlock_spin(&sio_lock); 3143 ttwwakeup(tp); 3144 splx(s); 3145 } 3146 3147 static void 3148 comstop(tp, rw) 3149 struct tty *tp; 3150 int rw; 3151 { 3152 struct com_s *com; 3153 #ifdef PC98 3154 int rsa98_tmp = 0; 3155 #endif 3156 3157 com = tp->t_sc; 3158 if (com == NULL || com->gone) 3159 return; 3160 mtx_lock_spin(&sio_lock); 3161 if (rw & FWRITE) { 3162 #ifdef PC98 3163 if (!IS_8251(com->pc98_if_type)) { 3164 #endif 3165 if (com->hasfifo) 3166 #ifdef COM_ESP 3167 /* XXX avoid h/w bug. */ 3168 if (!com->esp) 3169 #endif 3170 sio_setreg(com, com_fifo, 3171 FIFO_XMT_RST | com->fifo_image); 3172 #ifdef PC98 3173 if (com->pc98_if_type == COM_IF_RSA98III) 3174 for (rsa98_tmp = 0; rsa98_tmp < 2048; rsa98_tmp++) 3175 sio_setreg(com, com_fifo, 3176 FIFO_XMT_RST | com->fifo_image); 3177 } 3178 #endif 3179 com->obufs[0].l_queued = FALSE; 3180 com->obufs[1].l_queued = FALSE; 3181 if (com->state & CS_ODONE) 3182 com_events -= LOTS_OF_EVENTS; 3183 com->state &= ~(CS_ODONE | CS_BUSY); 3184 com->tp->t_state &= ~TS_BUSY; 3185 } 3186 if (rw & FREAD) { 3187 #ifdef PC98 3188 if (!IS_8251(com->pc98_if_type)) { 3189 if (com->pc98_if_type == COM_IF_RSA98III) 3190 for (rsa98_tmp = 0; rsa98_tmp < 2048; rsa98_tmp++) 3191 sio_getreg(com, com_data); 3192 #endif 3193 if (com->hasfifo) 3194 #ifdef COM_ESP 3195 /* XXX avoid h/w bug. */ 3196 if (!com->esp) 3197 #endif 3198 sio_setreg(com, com_fifo, 3199 FIFO_RCV_RST | com->fifo_image); 3200 #ifdef PC98 3201 } 3202 #endif 3203 com_events -= (com->iptr - com->ibuf); 3204 com->iptr = com->ibuf; 3205 } 3206 mtx_unlock_spin(&sio_lock); 3207 comstart(tp); 3208 } 3209 3210 static int 3211 commodem(struct tty *tp, int sigon, int sigoff) 3212 { 3213 struct com_s *com; 3214 int bitand, bitor, msr; 3215 #ifdef PC98 3216 int clr, set; 3217 #endif 3218 3219 com = tp->t_sc; 3220 if (com->gone) 3221 return(0); 3222 if (sigon != 0 || sigoff != 0) { 3223 #ifdef PC98 3224 if (IS_8251(com->pc98_if_type)) { 3225 bitand = bitor = 0; 3226 clr = set = 0; 3227 if (sigoff & SER_DTR) { 3228 bitand |= TIOCM_DTR; 3229 clr |= CMD8251_DTR; 3230 } 3231 if (sigoff & SER_RTS) { 3232 bitand |= TIOCM_RTS; 3233 clr |= CMD8251_RxEN | CMD8251_RTS; 3234 } 3235 if (sigon & SER_DTR) { 3236 bitor |= TIOCM_DTR; 3237 set |= CMD8251_TxEN | CMD8251_RxEN | 3238 CMD8251_DTR; 3239 } 3240 if (sigon & SER_RTS) { 3241 bitor |= TIOCM_RTS; 3242 set |= CMD8251_TxEN | CMD8251_RxEN | 3243 CMD8251_RTS; 3244 } 3245 bitand = ~bitand; 3246 mtx_lock_spin(&sio_lock); 3247 com->pc98_prev_modem_status &= bitand; 3248 com->pc98_prev_modem_status |= bitor; 3249 pc98_i8251_clear_or_cmd(com, clr, set); 3250 mtx_unlock_spin(&sio_lock); 3251 return (0); 3252 } else { 3253 #endif 3254 bitand = bitor = 0; 3255 if (sigoff & SER_DTR) 3256 bitand |= MCR_DTR; 3257 if (sigoff & SER_RTS) 3258 bitand |= MCR_RTS; 3259 if (sigon & SER_DTR) 3260 bitor |= MCR_DTR; 3261 if (sigon & SER_RTS) 3262 bitor |= MCR_RTS; 3263 bitand = ~bitand; 3264 mtx_lock_spin(&sio_lock); 3265 com->mcr_image &= bitand; 3266 com->mcr_image |= bitor; 3267 outb(com->modem_ctl_port, com->mcr_image); 3268 mtx_unlock_spin(&sio_lock); 3269 return (0); 3270 #ifdef PC98 3271 } 3272 #endif 3273 } else { 3274 #ifdef PC98 3275 if (IS_8251(com->pc98_if_type)) 3276 return (com_tiocm_get(com)); 3277 else { 3278 #endif 3279 bitor = 0; 3280 if (com->mcr_image & MCR_DTR) 3281 bitor |= SER_DTR; 3282 if (com->mcr_image & MCR_RTS) 3283 bitor |= SER_RTS; 3284 msr = com->prev_modem_status; 3285 if (msr & MSR_CTS) 3286 bitor |= SER_CTS; 3287 if (msr & MSR_DCD) 3288 bitor |= SER_DCD; 3289 if (msr & MSR_DSR) 3290 bitor |= SER_DSR; 3291 if (msr & MSR_DSR) 3292 bitor |= SER_DSR; 3293 if (msr & (MSR_RI | MSR_TERI)) 3294 bitor |= SER_RI; 3295 return (bitor); 3296 #ifdef PC98 3297 } 3298 #endif 3299 } 3300 } 3301 3302 static void 3303 siosettimeout() 3304 { 3305 struct com_s *com; 3306 bool_t someopen; 3307 int unit; 3308 3309 /* 3310 * Set our timeout period to 1 second if no polled devices are open. 3311 * Otherwise set it to max(1/200, 1/hz). 3312 * Enable timeouts iff some device is open. 3313 */ 3314 untimeout(comwakeup, (void *)NULL, sio_timeout_handle); 3315 sio_timeout = hz; 3316 someopen = FALSE; 3317 for (unit = 0; unit < sio_numunits; ++unit) { 3318 com = com_addr(unit); 3319 if (com != NULL && com->tp != NULL 3320 && com->tp->t_state & TS_ISOPEN && !com->gone) { 3321 someopen = TRUE; 3322 if (com->poll || com->poll_output) { 3323 sio_timeout = hz > 200 ? hz / 200 : 1; 3324 break; 3325 } 3326 } 3327 } 3328 if (someopen) { 3329 sio_timeouts_until_log = hz / sio_timeout; 3330 sio_timeout_handle = timeout(comwakeup, (void *)NULL, 3331 sio_timeout); 3332 } else { 3333 /* Flush error messages, if any. */ 3334 sio_timeouts_until_log = 1; 3335 comwakeup((void *)NULL); 3336 untimeout(comwakeup, (void *)NULL, sio_timeout_handle); 3337 } 3338 } 3339 3340 static void 3341 comwakeup(chan) 3342 void *chan; 3343 { 3344 struct com_s *com; 3345 int unit; 3346 3347 sio_timeout_handle = timeout(comwakeup, (void *)NULL, sio_timeout); 3348 3349 /* 3350 * Recover from lost output interrupts. 3351 * Poll any lines that don't use interrupts. 3352 */ 3353 for (unit = 0; unit < sio_numunits; ++unit) { 3354 com = com_addr(unit); 3355 if (com != NULL && !com->gone 3356 && (com->state >= (CS_BUSY | CS_TTGO) || com->poll)) { 3357 mtx_lock_spin(&sio_lock); 3358 siointr1(com); 3359 mtx_unlock_spin(&sio_lock); 3360 } 3361 } 3362 3363 /* 3364 * Check for and log errors, but not too often. 3365 */ 3366 if (--sio_timeouts_until_log > 0) 3367 return; 3368 sio_timeouts_until_log = hz / sio_timeout; 3369 for (unit = 0; unit < sio_numunits; ++unit) { 3370 int errnum; 3371 3372 com = com_addr(unit); 3373 if (com == NULL) 3374 continue; 3375 if (com->gone) 3376 continue; 3377 for (errnum = 0; errnum < CE_NTYPES; ++errnum) { 3378 u_int delta; 3379 u_long total; 3380 3381 mtx_lock_spin(&sio_lock); 3382 delta = com->delta_error_counts[errnum]; 3383 com->delta_error_counts[errnum] = 0; 3384 mtx_unlock_spin(&sio_lock); 3385 if (delta == 0) 3386 continue; 3387 total = com->error_counts[errnum] += delta; 3388 log(LOG_ERR, "sio%d: %u more %s%s (total %lu)\n", 3389 unit, delta, error_desc[errnum], 3390 delta == 1 ? "" : "s", total); 3391 } 3392 } 3393 } 3394 3395 #ifdef PC98 3396 /* commint is called when modem control line changes */ 3397 static void 3398 commint(struct cdev *dev) 3399 { 3400 register struct tty *tp; 3401 int stat,delta; 3402 struct com_s *com; 3403 3404 com = dev->si_drv1; 3405 tp = com->tp; 3406 3407 stat = com_tiocm_get(com); 3408 delta = com_tiocm_get_delta(com); 3409 3410 if (com->state & CS_CTS_OFLOW) { 3411 if (stat & TIOCM_CTS) 3412 com->state |= CS_ODEVREADY; 3413 else 3414 com->state &= ~CS_ODEVREADY; 3415 } 3416 if ((delta & TIOCM_CAR) && (ISCALLOUT(dev)) == 0) { 3417 if (stat & TIOCM_CAR ) 3418 (void)ttyld_modem(tp, 1); 3419 else if (ttyld_modem(tp, 0) == 0) { 3420 /* negate DTR, RTS */ 3421 com_tiocm_bic(com, (tp->t_cflag & HUPCL) ? 3422 TIOCM_DTR|TIOCM_RTS|TIOCM_LE : TIOCM_LE ); 3423 /* disable IENABLE */ 3424 com_int_TxRx_disable( com ); 3425 } 3426 } 3427 } 3428 #endif 3429 3430 /* 3431 * Following are all routines needed for SIO to act as console 3432 */ 3433 struct siocnstate { 3434 u_char dlbl; 3435 u_char dlbh; 3436 u_char ier; 3437 u_char cfcr; 3438 u_char mcr; 3439 }; 3440 3441 /* 3442 * This is a function in order to not replicate "ttyd%d" more 3443 * places than absolutely necessary. 3444 */ 3445 static void 3446 siocnset(struct consdev *cd, int unit) 3447 { 3448 3449 cd->cn_unit = unit; 3450 sprintf(cd->cn_name, "ttyd%d", unit); 3451 } 3452 3453 static speed_t siocngetspeed(Port_t, u_long rclk); 3454 static void siocnclose(struct siocnstate *sp, Port_t iobase); 3455 static void siocnopen(struct siocnstate *sp, Port_t iobase, int speed); 3456 static void siocntxwait(Port_t iobase); 3457 3458 static cn_probe_t sio_cnprobe; 3459 static cn_init_t sio_cninit; 3460 static cn_term_t sio_cnterm; 3461 static cn_getc_t sio_cngetc; 3462 static cn_putc_t sio_cnputc; 3463 static cn_grab_t sio_cngrab; 3464 static cn_ungrab_t sio_cnungrab; 3465 3466 CONSOLE_DRIVER(sio); 3467 3468 static void 3469 siocntxwait(iobase) 3470 Port_t iobase; 3471 { 3472 int timo; 3473 3474 /* 3475 * Wait for any pending transmission to finish. Required to avoid 3476 * the UART lockup bug when the speed is changed, and for normal 3477 * transmits. 3478 */ 3479 timo = 100000; 3480 while ((inb(iobase + com_lsr) & (LSR_TSRE | LSR_TXRDY)) 3481 != (LSR_TSRE | LSR_TXRDY) && --timo != 0) 3482 ; 3483 } 3484 3485 /* 3486 * Read the serial port specified and try to figure out what speed 3487 * it's currently running at. We're assuming the serial port has 3488 * been initialized and is basicly idle. This routine is only intended 3489 * to be run at system startup. 3490 * 3491 * If the value read from the serial port doesn't make sense, return 0. 3492 */ 3493 3494 static speed_t 3495 siocngetspeed(iobase, rclk) 3496 Port_t iobase; 3497 u_long rclk; 3498 { 3499 u_int divisor; 3500 u_char dlbh; 3501 u_char dlbl; 3502 u_char cfcr; 3503 3504 cfcr = inb(iobase + com_cfcr); 3505 outb(iobase + com_cfcr, CFCR_DLAB | cfcr); 3506 3507 dlbl = inb(iobase + com_dlbl); 3508 dlbh = inb(iobase + com_dlbh); 3509 3510 outb(iobase + com_cfcr, cfcr); 3511 3512 divisor = dlbh << 8 | dlbl; 3513 3514 /* XXX there should be more sanity checking. */ 3515 if (divisor == 0) 3516 return (CONSPEED); 3517 return (rclk / (16UL * divisor)); 3518 } 3519 3520 static void 3521 siocnopen(sp, iobase, speed) 3522 struct siocnstate *sp; 3523 Port_t iobase; 3524 int speed; 3525 { 3526 u_int divisor; 3527 u_char dlbh; 3528 u_char dlbl; 3529 3530 /* 3531 * Save all the device control registers except the fifo register 3532 * and set our default ones (cs8 -parenb speed=comdefaultrate). 3533 * We can't save the fifo register since it is read-only. 3534 */ 3535 sp->ier = inb(iobase + com_ier); 3536 outb(iobase + com_ier, 0); /* spltty() doesn't stop siointr() */ 3537 siocntxwait(iobase); 3538 sp->cfcr = inb(iobase + com_cfcr); 3539 outb(iobase + com_cfcr, CFCR_DLAB | CFCR_8BITS); 3540 sp->dlbl = inb(iobase + com_dlbl); 3541 sp->dlbh = inb(iobase + com_dlbh); 3542 /* 3543 * Only set the divisor registers if they would change, since on 3544 * some 16550 incompatibles (Startech), setting them clears the 3545 * data input register. This also reduces the effects of the 3546 * UMC8669F bug. 3547 */ 3548 divisor = siodivisor(comdefaultrclk, speed); 3549 dlbl = divisor & 0xFF; 3550 if (sp->dlbl != dlbl) 3551 outb(iobase + com_dlbl, dlbl); 3552 dlbh = divisor >> 8; 3553 if (sp->dlbh != dlbh) 3554 outb(iobase + com_dlbh, dlbh); 3555 outb(iobase + com_cfcr, CFCR_8BITS); 3556 sp->mcr = inb(iobase + com_mcr); 3557 /* 3558 * We don't want interrupts, but must be careful not to "disable" 3559 * them by clearing the MCR_IENABLE bit, since that might cause 3560 * an interrupt by floating the IRQ line. 3561 */ 3562 outb(iobase + com_mcr, (sp->mcr & MCR_IENABLE) | MCR_DTR | MCR_RTS); 3563 } 3564 3565 static void 3566 siocnclose(sp, iobase) 3567 struct siocnstate *sp; 3568 Port_t iobase; 3569 { 3570 /* 3571 * Restore the device control registers. 3572 */ 3573 siocntxwait(iobase); 3574 outb(iobase + com_cfcr, CFCR_DLAB | CFCR_8BITS); 3575 if (sp->dlbl != inb(iobase + com_dlbl)) 3576 outb(iobase + com_dlbl, sp->dlbl); 3577 if (sp->dlbh != inb(iobase + com_dlbh)) 3578 outb(iobase + com_dlbh, sp->dlbh); 3579 outb(iobase + com_cfcr, sp->cfcr); 3580 /* 3581 * XXX damp oscillations of MCR_DTR and MCR_RTS by not restoring them. 3582 */ 3583 outb(iobase + com_mcr, sp->mcr | MCR_DTR | MCR_RTS); 3584 outb(iobase + com_ier, sp->ier); 3585 } 3586 3587 static void 3588 sio_cnprobe(cp) 3589 struct consdev *cp; 3590 { 3591 speed_t boot_speed; 3592 u_char cfcr; 3593 u_int divisor; 3594 int s, unit; 3595 struct siocnstate sp; 3596 3597 /* 3598 * Find our first enabled console, if any. If it is a high-level 3599 * console device, then initialize it and return successfully. 3600 * If it is a low-level console device, then initialize it and 3601 * return unsuccessfully. It must be initialized in both cases 3602 * for early use by console drivers and debuggers. Initializing 3603 * the hardware is not necessary in all cases, since the i/o 3604 * routines initialize it on the fly, but it is necessary if 3605 * input might arrive while the hardware is switched back to an 3606 * uninitialized state. We can't handle multiple console devices 3607 * yet because our low-level routines don't take a device arg. 3608 * We trust the user to set the console flags properly so that we 3609 * don't need to probe. 3610 */ 3611 cp->cn_pri = CN_DEAD; 3612 3613 for (unit = 0; unit < 16; unit++) { /* XXX need to know how many */ 3614 int flags; 3615 3616 if (resource_disabled("sio", unit)) 3617 continue; 3618 if (resource_int_value("sio", unit, "flags", &flags)) 3619 continue; 3620 if (COM_CONSOLE(flags) || COM_DEBUGGER(flags)) { 3621 int port; 3622 Port_t iobase; 3623 3624 if (resource_int_value("sio", unit, "port", &port)) 3625 continue; 3626 iobase = port; 3627 s = spltty(); 3628 if ((boothowto & RB_SERIAL) && COM_CONSOLE(flags)) { 3629 boot_speed = 3630 siocngetspeed(iobase, comdefaultrclk); 3631 if (boot_speed) 3632 comdefaultrate = boot_speed; 3633 } 3634 3635 /* 3636 * Initialize the divisor latch. We can't rely on 3637 * siocnopen() to do this the first time, since it 3638 * avoids writing to the latch if the latch appears 3639 * to have the correct value. Also, if we didn't 3640 * just read the speed from the hardware, then we 3641 * need to set the speed in hardware so that 3642 * switching it later is null. 3643 */ 3644 cfcr = inb(iobase + com_cfcr); 3645 outb(iobase + com_cfcr, CFCR_DLAB | cfcr); 3646 divisor = siodivisor(comdefaultrclk, comdefaultrate); 3647 outb(iobase + com_dlbl, divisor & 0xff); 3648 outb(iobase + com_dlbh, divisor >> 8); 3649 outb(iobase + com_cfcr, cfcr); 3650 3651 siocnopen(&sp, iobase, comdefaultrate); 3652 3653 splx(s); 3654 if (COM_CONSOLE(flags) && !COM_LLCONSOLE(flags)) { 3655 siocnset(cp, unit); 3656 cp->cn_pri = COM_FORCECONSOLE(flags) 3657 || boothowto & RB_SERIAL 3658 ? CN_REMOTE : CN_NORMAL; 3659 siocniobase = iobase; 3660 siocnunit = unit; 3661 } 3662 #ifdef GDB 3663 if (COM_DEBUGGER(flags)) 3664 siogdbiobase = iobase; 3665 #endif 3666 } 3667 } 3668 } 3669 3670 static void 3671 sio_cninit(cp) 3672 struct consdev *cp; 3673 { 3674 comconsole = cp->cn_unit; 3675 } 3676 3677 static void 3678 sio_cnterm(cp) 3679 struct consdev *cp; 3680 { 3681 comconsole = -1; 3682 } 3683 3684 static void 3685 sio_cngrab(struct consdev *cp) 3686 { 3687 } 3688 3689 static void 3690 sio_cnungrab(struct consdev *cp) 3691 { 3692 } 3693 3694 static int 3695 sio_cngetc(struct consdev *cd) 3696 { 3697 int c; 3698 Port_t iobase; 3699 int s; 3700 struct siocnstate sp; 3701 speed_t speed; 3702 3703 if (cd != NULL && cd->cn_unit == siocnunit) { 3704 iobase = siocniobase; 3705 speed = comdefaultrate; 3706 } else { 3707 #ifdef GDB 3708 iobase = siogdbiobase; 3709 speed = gdbdefaultrate; 3710 #else 3711 return (-1); 3712 #endif 3713 } 3714 s = spltty(); 3715 siocnopen(&sp, iobase, speed); 3716 if (inb(iobase + com_lsr) & LSR_RXRDY) 3717 c = inb(iobase + com_data); 3718 else 3719 c = -1; 3720 siocnclose(&sp, iobase); 3721 splx(s); 3722 return (c); 3723 } 3724 3725 static void 3726 sio_cnputc(struct consdev *cd, int c) 3727 { 3728 int need_unlock; 3729 int s; 3730 struct siocnstate sp; 3731 Port_t iobase; 3732 speed_t speed; 3733 3734 if (cd != NULL && cd->cn_unit == siocnunit) { 3735 iobase = siocniobase; 3736 speed = comdefaultrate; 3737 } else { 3738 #ifdef GDB 3739 iobase = siogdbiobase; 3740 speed = gdbdefaultrate; 3741 #else 3742 return; 3743 #endif 3744 } 3745 s = spltty(); 3746 need_unlock = 0; 3747 if (!kdb_active && sio_inited == 2 && !mtx_owned(&sio_lock)) { 3748 mtx_lock_spin(&sio_lock); 3749 need_unlock = 1; 3750 } 3751 siocnopen(&sp, iobase, speed); 3752 siocntxwait(iobase); 3753 outb(iobase + com_data, c); 3754 siocnclose(&sp, iobase); 3755 if (need_unlock) 3756 mtx_unlock_spin(&sio_lock); 3757 splx(s); 3758 } 3759 3760 /* 3761 * Remote gdb(1) support. 3762 */ 3763 3764 #if defined(GDB) 3765 3766 #include <gdb/gdb.h> 3767 3768 static gdb_probe_f siogdbprobe; 3769 static gdb_init_f siogdbinit; 3770 static gdb_term_f siogdbterm; 3771 static gdb_getc_f siogdbgetc; 3772 static gdb_putc_f siogdbputc; 3773 3774 GDB_DBGPORT(sio, siogdbprobe, siogdbinit, siogdbterm, siogdbgetc, siogdbputc); 3775 3776 static int 3777 siogdbprobe(void) 3778 { 3779 return ((siogdbiobase != 0) ? 0 : -1); 3780 } 3781 3782 static void 3783 siogdbinit(void) 3784 { 3785 } 3786 3787 static void 3788 siogdbterm(void) 3789 { 3790 } 3791 3792 static void 3793 siogdbputc(int c) 3794 { 3795 sio_cnputc(NULL, c); 3796 } 3797 3798 static int 3799 siogdbgetc(void) 3800 { 3801 return (sio_cngetc(NULL)); 3802 } 3803 3804 #endif 3805 3806 #ifdef PC98 3807 /* 3808 * pc98 local function 3809 */ 3810 static void 3811 com_tiocm_bis(struct com_s *com, int msr) 3812 { 3813 int s; 3814 int tmp = 0; 3815 3816 s=spltty(); 3817 com->pc98_prev_modem_status |= ( msr & (TIOCM_LE|TIOCM_DTR|TIOCM_RTS) ); 3818 tmp |= CMD8251_TxEN|CMD8251_RxEN; 3819 if ( msr & TIOCM_DTR ) tmp |= CMD8251_DTR; 3820 if ( msr & TIOCM_RTS ) tmp |= CMD8251_RTS; 3821 3822 pc98_i8251_or_cmd( com, tmp ); 3823 splx(s); 3824 } 3825 3826 static void 3827 com_tiocm_bic(struct com_s *com, int msr) 3828 { 3829 int s; 3830 int tmp = msr; 3831 3832 s=spltty(); 3833 com->pc98_prev_modem_status &= ~( msr & (TIOCM_LE|TIOCM_DTR|TIOCM_RTS) ); 3834 if ( msr & TIOCM_DTR ) tmp |= CMD8251_DTR; 3835 if ( msr & TIOCM_RTS ) tmp |= CMD8251_RTS; 3836 3837 pc98_i8251_clear_cmd( com, tmp ); 3838 splx(s); 3839 } 3840 3841 static int 3842 com_tiocm_get(struct com_s *com) 3843 { 3844 return( com->pc98_prev_modem_status ); 3845 } 3846 3847 static int 3848 com_tiocm_get_delta(struct com_s *com) 3849 { 3850 int tmp; 3851 3852 tmp = com->pc98_modem_delta; 3853 com->pc98_modem_delta = 0; 3854 return( tmp ); 3855 } 3856 3857 /* convert to TIOCM_?? ( ioctl.h ) */ 3858 static int 3859 pc98_get_modem_status(struct com_s *com) 3860 { 3861 register int msr; 3862 3863 msr = com->pc98_prev_modem_status 3864 & ~(TIOCM_CAR|TIOCM_RI|TIOCM_DSR|TIOCM_CTS); 3865 if (com->pc98_8251fifo_enable) { 3866 int stat2; 3867 3868 stat2 = inb(I8251F_msr); 3869 if ( stat2 & MSR_DCD ) msr |= TIOCM_CAR; 3870 if ( stat2 & MSR_RI ) msr |= TIOCM_RI; 3871 if ( stat2 & MSR_DSR ) msr |= TIOCM_DSR; 3872 if ( stat2 & MSR_CTS ) msr |= TIOCM_CTS; 3873 #if COM_CARRIER_DETECT_EMULATE 3874 if ( msr & (TIOCM_DSR|TIOCM_CTS) ) { 3875 msr |= TIOCM_CAR; 3876 } 3877 #endif 3878 } else { 3879 int stat, stat2; 3880 3881 stat = inb(com->sts_port); 3882 stat2 = inb(com->in_modem_port); 3883 if ( !(stat2 & CICSCD_CD) ) msr |= TIOCM_CAR; 3884 if ( !(stat2 & CICSCD_CI) ) msr |= TIOCM_RI; 3885 if ( stat & STS8251_DSR ) msr |= TIOCM_DSR; 3886 if ( !(stat2 & CICSCD_CS) ) msr |= TIOCM_CTS; 3887 #if COM_CARRIER_DETECT_EMULATE 3888 if ( msr & (TIOCM_DSR|TIOCM_CTS) ) { 3889 msr |= TIOCM_CAR; 3890 } 3891 #endif 3892 } 3893 return(msr); 3894 } 3895 3896 static void 3897 pc98_check_msr(void* chan) 3898 { 3899 int msr, delta; 3900 int s; 3901 register struct tty *tp; 3902 struct com_s *com; 3903 struct cdev *dev; 3904 3905 dev=(struct cdev *)chan; 3906 com = dev->si_drv1; 3907 tp = dev->si_tty; 3908 3909 s = spltty(); 3910 msr = pc98_get_modem_status(com); 3911 /* make change flag */ 3912 delta = msr ^ com->pc98_prev_modem_status; 3913 if ( delta & TIOCM_CAR ) { 3914 if ( com->modem_car_chg_timer ) { 3915 if ( -- com->modem_car_chg_timer ) 3916 msr ^= TIOCM_CAR; 3917 } else { 3918 if ((com->modem_car_chg_timer = (msr & TIOCM_CAR) ? 3919 DCD_ON_RECOGNITION : DCD_OFF_TOLERANCE) != 0) 3920 msr ^= TIOCM_CAR; 3921 } 3922 } else 3923 com->modem_car_chg_timer = 0; 3924 delta = ( msr ^ com->pc98_prev_modem_status ) & 3925 (TIOCM_CAR|TIOCM_RI|TIOCM_DSR|TIOCM_CTS); 3926 com->pc98_prev_modem_status = msr; 3927 delta = ( com->pc98_modem_delta |= delta ); 3928 splx(s); 3929 if ( com->modem_checking || (tp->t_state & (TS_ISOPEN)) ) { 3930 if ( delta ) { 3931 commint(dev); 3932 } 3933 timeout(pc98_check_msr, (caddr_t)dev, 3934 PC98_CHECK_MODEM_INTERVAL); 3935 } else { 3936 com->modem_checking = 0; 3937 } 3938 } 3939 3940 static void 3941 pc98_msrint_start(struct cdev *dev) 3942 { 3943 struct com_s *com; 3944 int s = spltty(); 3945 3946 com = dev->si_drv1; 3947 /* modem control line check routine envoke interval is 1/10 sec */ 3948 if ( com->modem_checking == 0 ) { 3949 com->pc98_prev_modem_status = pc98_get_modem_status(com); 3950 com->pc98_modem_delta = 0; 3951 timeout(pc98_check_msr, (caddr_t)dev, 3952 PC98_CHECK_MODEM_INTERVAL); 3953 com->modem_checking = 1; 3954 } 3955 splx(s); 3956 } 3957 3958 static void 3959 pc98_disable_i8251_interrupt(struct com_s *com, int mod) 3960 { 3961 /* disable interrupt */ 3962 register int tmp; 3963 3964 mod |= ~(IEN_Tx|IEN_TxEMP|IEN_Rx); 3965 COM_INT_DISABLE 3966 tmp = inb( com->intr_ctrl_port ) & ~(IEN_Tx|IEN_TxEMP|IEN_Rx); 3967 outb( com->intr_ctrl_port, (com->intr_enable&=~mod) | tmp ); 3968 COM_INT_ENABLE 3969 } 3970 3971 static void 3972 pc98_enable_i8251_interrupt(struct com_s *com, int mod) 3973 { 3974 register int tmp; 3975 3976 COM_INT_DISABLE 3977 tmp = inb( com->intr_ctrl_port ) & ~(IEN_Tx|IEN_TxEMP|IEN_Rx); 3978 outb( com->intr_ctrl_port, (com->intr_enable|=mod) | tmp ); 3979 COM_INT_ENABLE 3980 } 3981 3982 static int 3983 pc98_check_i8251_interrupt(struct com_s *com) 3984 { 3985 return ( com->intr_enable & 0x07 ); 3986 } 3987 3988 static void 3989 pc98_i8251_clear_cmd(struct com_s *com, int x) 3990 { 3991 int tmp; 3992 3993 COM_INT_DISABLE 3994 tmp = com->pc98_prev_siocmd & ~(x); 3995 if (com->pc98_8251fifo_enable) 3996 outb(I8251F_fcr, 0); 3997 outb(com->cmd_port, tmp); 3998 com->pc98_prev_siocmd = tmp & ~(CMD8251_ER|CMD8251_RESET|CMD8251_EH); 3999 if (com->pc98_8251fifo_enable) 4000 outb(I8251F_fcr, FIFO_ENABLE); 4001 COM_INT_ENABLE 4002 } 4003 4004 static void 4005 pc98_i8251_or_cmd(struct com_s *com, int x) 4006 { 4007 int tmp; 4008 4009 COM_INT_DISABLE 4010 if (com->pc98_8251fifo_enable) 4011 outb(I8251F_fcr, 0); 4012 tmp = com->pc98_prev_siocmd | (x); 4013 outb(com->cmd_port, tmp); 4014 com->pc98_prev_siocmd = tmp & ~(CMD8251_ER|CMD8251_RESET|CMD8251_EH); 4015 if (com->pc98_8251fifo_enable) 4016 outb(I8251F_fcr, FIFO_ENABLE); 4017 COM_INT_ENABLE 4018 } 4019 4020 static void 4021 pc98_i8251_set_cmd(struct com_s *com, int x) 4022 { 4023 int tmp; 4024 4025 COM_INT_DISABLE 4026 if (com->pc98_8251fifo_enable) 4027 outb(I8251F_fcr, 0); 4028 tmp = (x); 4029 outb(com->cmd_port, tmp); 4030 com->pc98_prev_siocmd = tmp & ~(CMD8251_ER|CMD8251_RESET|CMD8251_EH); 4031 if (com->pc98_8251fifo_enable) 4032 outb(I8251F_fcr, FIFO_ENABLE); 4033 COM_INT_ENABLE 4034 } 4035 4036 static void 4037 pc98_i8251_clear_or_cmd(struct com_s *com, int clr, int x) 4038 { 4039 int tmp; 4040 COM_INT_DISABLE 4041 if (com->pc98_8251fifo_enable) 4042 outb(I8251F_fcr, 0); 4043 tmp = com->pc98_prev_siocmd & ~(clr); 4044 tmp |= (x); 4045 outb(com->cmd_port, tmp); 4046 com->pc98_prev_siocmd = tmp & ~(CMD8251_ER|CMD8251_RESET|CMD8251_EH); 4047 if (com->pc98_8251fifo_enable) 4048 outb(I8251F_fcr, FIFO_ENABLE); 4049 COM_INT_ENABLE 4050 } 4051 4052 static int 4053 pc98_i8251_get_cmd(struct com_s *com) 4054 { 4055 return com->pc98_prev_siocmd; 4056 } 4057 4058 static int 4059 pc98_i8251_get_mod(struct com_s *com) 4060 { 4061 return com->pc98_prev_siomod; 4062 } 4063 4064 static void 4065 pc98_i8251_reset(struct com_s *com, int mode, int command) 4066 { 4067 if (com->pc98_8251fifo_enable) 4068 outb(I8251F_fcr, 0); 4069 outb(com->cmd_port, 0); /* dummy */ 4070 DELAY(2); 4071 outb(com->cmd_port, 0); /* dummy */ 4072 DELAY(2); 4073 outb(com->cmd_port, 0); /* dummy */ 4074 DELAY(2); 4075 outb(com->cmd_port, CMD8251_RESET); /* internal reset */ 4076 DELAY(2); 4077 outb(com->cmd_port, mode ); /* mode register */ 4078 com->pc98_prev_siomod = mode; 4079 DELAY(2); 4080 pc98_i8251_set_cmd( com, (command|CMD8251_ER) ); 4081 DELAY(10); 4082 if (com->pc98_8251fifo_enable) 4083 outb(I8251F_fcr, FIFO_ENABLE | FIFO_XMT_RST | FIFO_RCV_RST); 4084 } 4085 4086 static void 4087 pc98_check_sysclock(void) 4088 { 4089 /* get system clock from port */ 4090 if ( pc98_machine_type & M_8M ) { 4091 /* 8 MHz system & H98 */ 4092 sysclock = 8; 4093 } else { 4094 /* 5 MHz system */ 4095 sysclock = 5; 4096 } 4097 } 4098 4099 static void 4100 com_cflag_and_speed_set( struct com_s *com, int cflag, int speed) 4101 { 4102 int cfcr=0; 4103 int previnterrupt; 4104 int tmp; 4105 u_int count; 4106 4107 if (pc98_ttspeedtab(com, speed, &count) != 0) 4108 return; 4109 4110 previnterrupt = pc98_check_i8251_interrupt(com); 4111 pc98_disable_i8251_interrupt( com, IEN_Tx|IEN_TxEMP|IEN_Rx ); 4112 4113 switch ( cflag&CSIZE ) { 4114 case CS5: 4115 cfcr = MOD8251_5BITS; break; 4116 case CS6: 4117 cfcr = MOD8251_6BITS; break; 4118 case CS7: 4119 cfcr = MOD8251_7BITS; break; 4120 case CS8: 4121 cfcr = MOD8251_8BITS; break; 4122 } 4123 if ( cflag&PARENB ) { 4124 if ( cflag&PARODD ) 4125 cfcr |= MOD8251_PENAB; 4126 else 4127 cfcr |= MOD8251_PENAB | MOD8251_PEVEN; 4128 } 4129 4130 if ( cflag&CSTOPB ) 4131 cfcr |= MOD8251_STOP2; 4132 else 4133 cfcr |= MOD8251_STOP1; 4134 4135 if ( count & 0x10000 ) 4136 cfcr |= MOD8251_CLKx1; 4137 else 4138 cfcr |= MOD8251_CLKx16; 4139 4140 while (!((tmp = inb(com->sts_port)) & STS8251_TxEMP)) 4141 ; 4142 4143 /* set baud rate from ospeed */ 4144 pc98_set_baud_rate( com, count ); 4145 4146 if ( cfcr != pc98_i8251_get_mod(com) ) 4147 pc98_i8251_reset(com, cfcr, pc98_i8251_get_cmd(com) ); 4148 4149 pc98_enable_i8251_interrupt( com, previnterrupt ); 4150 } 4151 4152 static int 4153 pc98_ttspeedtab(struct com_s *com, int speed, u_int *divisor) 4154 { 4155 int if_type, effect_sp, count = -1, mod; 4156 4157 if_type = com->pc98_if_type & 0x0f; 4158 4159 switch (com->pc98_if_type) { 4160 case COM_IF_INTERNAL: 4161 if (PC98SIO_baud_rate_port(if_type) != -1) { 4162 count = ttspeedtab(speed, if_8251_type[if_type].speedtab); 4163 if (count > 0) { 4164 count |= COM1_EXT_CLOCK; 4165 break; 4166 } 4167 } 4168 4169 /* for *1CLK asynchronous! mode, TEFUTEFU */ 4170 mod = (sysclock == 5) ? 2457600 : 1996800; 4171 effect_sp = ttspeedtab( speed, pc98speedtab ); 4172 if ( effect_sp < 0 ) /* XXX */ 4173 effect_sp = ttspeedtab( (speed - 1), pc98speedtab ); 4174 if ( effect_sp <= 0 ) 4175 return effect_sp; 4176 if ( effect_sp == speed ) 4177 mod /= 16; 4178 if ( mod % effect_sp ) 4179 return(-1); 4180 count = mod / effect_sp; 4181 if ( count > 65535 ) 4182 return(-1); 4183 if ( effect_sp != speed ) 4184 count |= 0x10000; 4185 break; 4186 case COM_IF_PC9861K_1: 4187 case COM_IF_PC9861K_2: 4188 count = 1; 4189 break; 4190 case COM_IF_IND_SS_1: 4191 case COM_IF_IND_SS_2: 4192 case COM_IF_PIO9032B_1: 4193 case COM_IF_PIO9032B_2: 4194 count = ttspeedtab( speed, if_8251_type[if_type].speedtab ); 4195 break; 4196 case COM_IF_B98_01_1: 4197 case COM_IF_B98_01_2: 4198 count = ttspeedtab( speed, if_8251_type[if_type].speedtab ); 4199 #ifdef B98_01_OLD 4200 if (count == 0 || count == 1) { 4201 count += 4; 4202 count |= 0x20000; /* x1 mode for 76800 and 153600 */ 4203 } 4204 #endif 4205 break; 4206 } 4207 4208 if (count < 0) 4209 return count; 4210 4211 *divisor = (u_int) count; 4212 return 0; 4213 } 4214 4215 static void 4216 pc98_set_baud_rate( struct com_s *com, u_int count ) 4217 { 4218 int if_type, io, s; 4219 4220 if_type = com->pc98_if_type & 0x0f; 4221 io = rman_get_start(com->ioportres) & 0xff00; 4222 4223 switch (com->pc98_if_type) { 4224 case COM_IF_INTERNAL: 4225 if (PC98SIO_baud_rate_port(if_type) != -1) { 4226 if (count & COM1_EXT_CLOCK) { 4227 outb((Port_t)PC98SIO_baud_rate_port(if_type), count & 0xff); 4228 break; 4229 } else { 4230 outb((Port_t)PC98SIO_baud_rate_port(if_type), 0x09); 4231 } 4232 } 4233 4234 if (count == 0) 4235 return; 4236 4237 /* set i8253 */ 4238 s = splclock(); 4239 if (count != 3) 4240 outb( 0x77, 0xb6 ); 4241 else 4242 outb( 0x77, 0xb4 ); 4243 outb( 0x5f, 0); 4244 outb( 0x75, count & 0xff ); 4245 outb( 0x5f, 0); 4246 outb( 0x75, (count >> 8) & 0xff ); 4247 splx(s); 4248 break; 4249 case COM_IF_IND_SS_1: 4250 case COM_IF_IND_SS_2: 4251 outb(io | PC98SIO_intr_ctrl_port(if_type), 0); 4252 outb(io | PC98SIO_baud_rate_port(if_type), 0); 4253 outb(io | PC98SIO_baud_rate_port(if_type), 0xc0); 4254 outb(io | PC98SIO_baud_rate_port(if_type), (count >> 8) | 0x80); 4255 outb(io | PC98SIO_baud_rate_port(if_type), count & 0xff); 4256 break; 4257 case COM_IF_PIO9032B_1: 4258 case COM_IF_PIO9032B_2: 4259 outb(io | PC98SIO_baud_rate_port(if_type), count); 4260 break; 4261 case COM_IF_B98_01_1: 4262 case COM_IF_B98_01_2: 4263 outb(io | PC98SIO_baud_rate_port(if_type), count & 0x0f); 4264 #ifdef B98_01_OLD 4265 /* 4266 * Some old B98_01 board should be controlled 4267 * in different way, but this hasn't been tested yet. 4268 */ 4269 outb(io | PC98SIO_func_port(if_type), 4270 (count & 0x20000) ? 0xf0 : 0xf2); 4271 #endif 4272 break; 4273 } 4274 } 4275 static int 4276 pc98_check_if_type(device_t dev, struct siodev *iod) 4277 { 4278 int irr, io, if_type, tmp; 4279 static short irq_tab[2][8] = { 4280 { 3, 5, 6, 9, 10, 12, 13, -1}, 4281 { 3, 10, 12, 13, 5, 6, 9, -1} 4282 }; 4283 4284 if_type = iod->if_type & 0x0f; 4285 iod->irq = 0; 4286 io = isa_get_port(dev) & 0xff00; 4287 4288 if (IS_8251(iod->if_type)) { 4289 if (PC98SIO_func_port(if_type) != -1) { 4290 outb(io | PC98SIO_func_port(if_type), 0xf2); 4291 tmp = ttspeedtab(9600, if_8251_type[if_type].speedtab); 4292 if (tmp != -1 && PC98SIO_baud_rate_port(if_type) != -1) 4293 outb(io | PC98SIO_baud_rate_port(if_type), tmp); 4294 } 4295 4296 iod->cmd = io | PC98SIO_cmd_port(if_type); 4297 iod->sts = io | PC98SIO_sts_port(if_type); 4298 iod->mod = io | PC98SIO_in_modem_port(if_type); 4299 iod->ctrl = io | PC98SIO_intr_ctrl_port(if_type); 4300 4301 if (iod->if_type == COM_IF_INTERNAL) { 4302 iod->irq = 4; 4303 4304 if (pc98_check_8251vfast()) { 4305 PC98SIO_baud_rate_port(if_type) = I8251F_div; 4306 if_8251_type[if_type].speedtab = pc98fast_speedtab; 4307 } 4308 } else { 4309 tmp = inb( iod->mod ) & if_8251_type[if_type].irr_mask; 4310 if ((isa_get_port(dev) & 0xff) == IO_COM2) 4311 iod->irq = irq_tab[0][tmp]; 4312 else 4313 iod->irq = irq_tab[1][tmp]; 4314 } 4315 } else { 4316 irr = if_16550a_type[if_type].irr_read; 4317 #ifdef COM_MULTIPORT 4318 if (!COM_ISMULTIPORT(device_get_flags(dev)) || 4319 device_get_unit(dev) == COM_MPMASTER(device_get_flags(dev))) 4320 #endif 4321 if (irr != -1) { 4322 tmp = inb(io | irr); 4323 if (isa_get_port(dev) & 0x01) /* XXX depend on RSB-384 */ 4324 iod->irq = irq_tab[1][tmp >> 3]; 4325 else 4326 iod->irq = irq_tab[0][tmp & 0x07]; 4327 } 4328 iod->cmd = 0; 4329 iod->sts = 0; 4330 iod->mod = 0; 4331 iod->ctrl = 0; 4332 } 4333 if ( iod->irq == -1 ) return -1; 4334 4335 return 0; 4336 } 4337 static void 4338 pc98_set_ioport(struct com_s *com) 4339 { 4340 int if_type = com->pc98_if_type & 0x0f; 4341 Port_t io = rman_get_start(com->ioportres) & 0xff00; 4342 4343 pc98_check_sysclock(); 4344 com->data_port = io | PC98SIO_data_port(if_type); 4345 com->cmd_port = io | PC98SIO_cmd_port(if_type); 4346 com->sts_port = io | PC98SIO_sts_port(if_type); 4347 com->in_modem_port = io | PC98SIO_in_modem_port(if_type); 4348 com->intr_ctrl_port = io | PC98SIO_intr_ctrl_port(if_type); 4349 } 4350 static int 4351 pc98_check_8251vfast(void) 4352 { 4353 int i; 4354 4355 outb(I8251F_div, 0x8c); 4356 DELAY(10); 4357 for (i = 0; i < 100; i++) { 4358 if ((inb(I8251F_div) & 0x80) != 0) { 4359 i = 0; 4360 break; 4361 } 4362 DELAY(1); 4363 } 4364 outb(I8251F_div, 0); 4365 DELAY(10); 4366 for (; i < 100; i++) { 4367 if ((inb(I8251F_div) & 0x80) == 0) 4368 return 1; 4369 DELAY(1); 4370 } 4371 4372 return 0; 4373 } 4374 static int 4375 pc98_check_8251fifo(void) 4376 { 4377 u_char tmp1, tmp2; 4378 4379 tmp1 = inb(I8251F_iir); 4380 DELAY(10); 4381 tmp2 = inb(I8251F_iir); 4382 if (((tmp1 ^ tmp2) & 0x40) != 0 && ((tmp1 | tmp2) & 0x20) == 0) 4383 return 1; 4384 4385 return 0; 4386 } 4387 #endif /* PC98 defined */
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