sio.c revision 66920
1184610Salfred/*- 2184610Salfred * Copyright (c) 1991 The Regents of the University of California. 3189002Sed * All rights reserved. 4184610Salfred * 5184610Salfred * Redistribution and use in source and binary forms, with or without 6184610Salfred * modification, are permitted provided that the following conditions 7184610Salfred * are met: 8184610Salfred * 1. Redistributions of source code must retain the above copyright 9184610Salfred * notice, this list of conditions and the following disclaimer. 10184610Salfred * 2. Redistributions in binary form must reproduce the above copyright 11184610Salfred * notice, this list of conditions and the following disclaimer in the 12184610Salfred * documentation and/or other materials provided with the distribution. 13184610Salfred * 3. All advertising materials mentioning features or use of this software 14184610Salfred * must display the following acknowledgement: 15184610Salfred * This product includes software developed by the University of 16184610Salfred * California, Berkeley and its contributors. 17184610Salfred * 4. Neither the name of the University nor the names of its contributors 18184610Salfred * may be used to endorse or promote products derived from this software 19184610Salfred * without specific prior written permission. 20184610Salfred * 21184610Salfred * THIS SOFTWARE IS PROVIDED BY THE REGENTS AND CONTRIBUTORS ``AS IS'' AND 22184610Salfred * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE 23184610Salfred * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE 24184610Salfred * ARE DISCLAIMED. IN NO EVENT SHALL THE REGENTS OR CONTRIBUTORS BE LIABLE 25184610Salfred * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL 26184610Salfred * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS 27184610Salfred * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) 28184610Salfred * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT 29184610Salfred * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY 30184610Salfred * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF 31184610Salfred * SUCH DAMAGE. 32190754Sthompsa * 33184610Salfred * $FreeBSD: head/sys/dev/sio/sio.c 66920 2000-10-10 10:06:26Z tanimura $ 34184610Salfred * from: @(#)com.c 7.5 (Berkeley) 5/16/91 35188942Sthompsa * from: i386/isa sio.c,v 1.234 36188942Sthompsa */ 37188942Sthompsa 38188942Sthompsa#include "opt_comconsole.h" 39184610Salfred#include "opt_compat.h" 40184610Salfred#include "opt_ddb.h" 41184610Salfred#include "opt_sio.h" 42188942Sthompsa#include "card.h" 43188942Sthompsa#include "pci.h" 44188942Sthompsa#include "sio.h" 45188942Sthompsa 46188942Sthompsa/* 47188942Sthompsa * Serial driver, based on 386BSD-0.1 com driver. 48188942Sthompsa * Mostly rewritten to use pseudo-DMA. 49188942Sthompsa * Works for National Semiconductor NS8250-NS16550AF UARTs. 50184610Salfred * COM driver, based on HP dca driver. 51188942Sthompsa * 52188942Sthompsa * Changes for PC-Card integration: 53188942Sthompsa * - Added PC-Card driver table and handlers 54184610Salfred */ 55184610Salfred#include <sys/param.h> 56184610Salfred#include <sys/bus.h> 57190181Sthompsa#include <sys/systm.h> 58184610Salfred#include <sys/reboot.h> 59184610Salfred#include <sys/malloc.h> 60190180Sthompsa#include <sys/tty.h> 61184610Salfred#include <sys/proc.h> 62184610Salfred#include <sys/module.h> 63184610Salfred#include <sys/conf.h> 64184610Salfred#include <sys/dkstat.h> 65192502Sthompsa#include <sys/fcntl.h> 66192502Sthompsa#include <sys/interrupt.h> 67184610Salfred#include <sys/ipl.h> 68184610Salfred#include <sys/kernel.h> 69184610Salfred#include <sys/syslog.h> 70184610Salfred#include <sys/sysctl.h> 71184610Salfred#include <sys/bus.h> 72184610Salfred#include <machine/bus_pio.h> 73184610Salfred#include <machine/bus.h> 74192984Sthompsa#include <sys/rman.h> 75192984Sthompsa#include <sys/timetc.h> 76192984Sthompsa#include <sys/timepps.h> 77192984Sthompsa 78192984Sthompsa#include <isa/isareg.h> 79184610Salfred#include <isa/isavar.h> 80184610Salfred#if NPCI > 0 81184610Salfred#include <pci/pcireg.h> 82184610Salfred#include <pci/pcivar.h> 83184610Salfred#endif 84192984Sthompsa#include <machine/lock.h> 85192984Sthompsa 86192984Sthompsa#include <machine/clock.h> 87192984Sthompsa#ifndef SMP 88185948Sthompsa#include <machine/lock.h> 89185948Sthompsa#endif 90190735Sthompsa#include <machine/resource.h> 91184610Salfred 92184610Salfred#include <isa/sioreg.h> 93184610Salfred 94184610Salfred#ifdef COM_ESP 95184610Salfred#include <isa/ic/esp.h> 96184610Salfred#endif 97192984Sthompsa#include <isa/ic/ns16550.h> 98184610Salfred 99184610Salfred/* XXX - this is ok because we only do sio fast interrupts on i386 */ 100184610Salfred#ifndef __i386__ 101184610Salfred#define disable_intr() 102184610Salfred#define enable_intr() 103184610Salfred#endif 104184610Salfred 105184610Salfred#define LOTS_OF_EVENTS 64 /* helps separate urgent events from input */ 106184610Salfred 107184610Salfred#define CALLOUT_MASK 0x80 108184610Salfred#define CONTROL_MASK 0x60 109184610Salfred#define CONTROL_INIT_STATE 0x20 110184610Salfred#define CONTROL_LOCK_STATE 0x40 111184610Salfred#define DEV_TO_UNIT(dev) (MINOR_TO_UNIT(minor(dev))) 112184610Salfred#define MINOR_MAGIC_MASK (CALLOUT_MASK | CONTROL_MASK) 113184610Salfred#define MINOR_TO_UNIT(mynor) ((mynor) & ~MINOR_MAGIC_MASK) 114184610Salfred 115184610Salfred#ifdef COM_MULTIPORT 116184610Salfred/* checks in flags for multiport and which is multiport "master chip" 117184610Salfred * for a given card 118184610Salfred */ 119184610Salfred#define COM_ISMULTIPORT(flags) ((flags) & 0x01) 120184610Salfred#define COM_MPMASTER(flags) (((flags) >> 8) & 0x0ff) 121184610Salfred#define COM_NOTAST4(flags) ((flags) & 0x04) 122184610Salfred#endif /* COM_MULTIPORT */ 123184610Salfred 124184610Salfred#define COM_CONSOLE(flags) ((flags) & 0x10) 125184610Salfred#define COM_FORCECONSOLE(flags) ((flags) & 0x20) 126184610Salfred#define COM_LLCONSOLE(flags) ((flags) & 0x40) 127184610Salfred#define COM_DEBUGGER(flags) ((flags) & 0x80) 128184610Salfred#define COM_LOSESOUTINTS(flags) ((flags) & 0x08) 129184610Salfred#define COM_NOFIFO(flags) ((flags) & 0x02) 130184610Salfred#define COM_ST16650A(flags) ((flags) & 0x20000) 131184610Salfred#define COM_C_NOPROBE (0x40000) 132184610Salfred#define COM_NOPROBE(flags) ((flags) & COM_C_NOPROBE) 133184610Salfred#define COM_C_IIR_TXRDYBUG (0x80000) 134184610Salfred#define COM_IIR_TXRDYBUG(flags) ((flags) & COM_C_IIR_TXRDYBUG) 135184610Salfred#define COM_FIFOSIZE(flags) (((flags) & 0xff000000) >> 24) 136184610Salfred 137184610Salfred#define com_scr 7 /* scratch register for 16450-16550 (R/W) */ 138184610Salfred 139184610Salfred#define sio_getreg(com, off) \ 140184610Salfred (bus_space_read_1((com)->bst, (com)->bsh, (off))) 141184610Salfred#define sio_setreg(com, off, value) \ 142184610Salfred (bus_space_write_1((com)->bst, (com)->bsh, (off), (value))) 143184610Salfred 144184610Salfred/* 145184610Salfred * com state bits. 146184610Salfred * (CS_BUSY | CS_TTGO) and (CS_BUSY | CS_TTGO | CS_ODEVREADY) must be higher 147184610Salfred * than the other bits so that they can be tested as a group without masking 148184610Salfred * off the low bits. 149184610Salfred * 150184610Salfred * The following com and tty flags correspond closely: 151184610Salfred * CS_BUSY = TS_BUSY (maintained by comstart(), siopoll() and 152192984Sthompsa * comstop()) 153192984Sthompsa * CS_TTGO = ~TS_TTSTOP (maintained by comparam() and comstart()) 154184610Salfred * CS_CTS_OFLOW = CCTS_OFLOW (maintained by comparam()) 155184610Salfred * CS_RTS_IFLOW = CRTS_IFLOW (maintained by comparam()) 156184610Salfred * TS_FLUSH is not used. 157184610Salfred * XXX I think TIOCSETA doesn't clear TS_TTSTOP when it clears IXON. 158184610Salfred * XXX CS_*FLOW should be CF_*FLOW in com->flags (control flags not state). 159184610Salfred */ 160184610Salfred#define CS_BUSY 0x80 /* output in progress */ 161184610Salfred#define CS_TTGO 0x40 /* output not stopped by XOFF */ 162184610Salfred#define CS_ODEVREADY 0x20 /* external device h/w ready (CTS) */ 163184610Salfred#define CS_CHECKMSR 1 /* check of MSR scheduled */ 164184610Salfred#define CS_CTS_OFLOW 2 /* use CTS output flow control */ 165184610Salfred#define CS_DTR_OFF 0x10 /* DTR held off */ 166184610Salfred#define CS_ODONE 4 /* output completed */ 167184610Salfred#define CS_RTS_IFLOW 8 /* use RTS input flow control */ 168184610Salfred#define CSE_BUSYCHECK 1 /* siobusycheck() scheduled */ 169184610Salfred 170184610Salfredstatic char const * const error_desc[] = { 171184610Salfred#define CE_OVERRUN 0 172184610Salfred "silo overflow", 173184610Salfred#define CE_INTERRUPT_BUF_OVERFLOW 1 174184610Salfred "interrupt-level buffer overflow", 175184610Salfred#define CE_TTY_BUF_OVERFLOW 2 176184610Salfred "tty-level buffer overflow", 177184610Salfred}; 178184610Salfred 179184610Salfred#define CE_NTYPES 3 180184610Salfred#define CE_RECORD(com, errnum) (++(com)->delta_error_counts[errnum]) 181184610Salfred 182184610Salfred/* types. XXX - should be elsewhere */ 183184610Salfredtypedef u_int Port_t; /* hardware port */ 184184610Salfredtypedef u_char bool_t; /* boolean */ 185184610Salfred 186184610Salfred/* queue of linear buffers */ 187184610Salfredstruct lbq { 188184610Salfred u_char *l_head; /* next char to process */ 189184610Salfred u_char *l_tail; /* one past the last char to process */ 190184610Salfred struct lbq *l_next; /* next in queue */ 191184610Salfred bool_t l_queued; /* nonzero if queued */ 192184610Salfred}; 193184610Salfred 194184610Salfred/* com device structure */ 195184610Salfredstruct com_s { 196184610Salfred u_int flags; /* Copy isa device flags */ 197184610Salfred u_char state; /* miscellaneous flag bits */ 198184610Salfred bool_t active_out; /* nonzero if the callout device is open */ 199184610Salfred u_char cfcr_image; /* copy of value written to CFCR */ 200184610Salfred#ifdef COM_ESP 201184610Salfred bool_t esp; /* is this unit a hayes esp board? */ 202184610Salfred#endif 203184610Salfred u_char extra_state; /* more flag bits, separate for order trick */ 204184610Salfred u_char fifo_image; /* copy of value written to FIFO */ 205184610Salfred bool_t hasfifo; /* nonzero for 16550 UARTs */ 206184610Salfred bool_t st16650a; /* Is a Startech 16650A or RTS/CTS compat */ 207184610Salfred bool_t loses_outints; /* nonzero if device loses output interrupts */ 208184610Salfred u_char mcr_image; /* copy of value written to MCR */ 209184610Salfred#ifdef COM_MULTIPORT 210184610Salfred bool_t multiport; /* is this unit part of a multiport device? */ 211184610Salfred#endif /* COM_MULTIPORT */ 212184610Salfred bool_t no_irq; /* nonzero if irq is not attached */ 213184610Salfred bool_t gone; /* hardware disappeared */ 214184610Salfred bool_t poll; /* nonzero if polling is required */ 215184610Salfred bool_t poll_output; /* nonzero if polling for output is required */ 216184610Salfred int unit; /* unit number */ 217184610Salfred int dtr_wait; /* time to hold DTR down on close (* 1/hz) */ 218184610Salfred u_int tx_fifo_size; 219184610Salfred u_int wopeners; /* # processes waiting for DCD in open() */ 220184610Salfred 221184610Salfred /* 222184610Salfred * The high level of the driver never reads status registers directly 223184610Salfred * because there would be too many side effects to handle conveniently. 224184610Salfred * Instead, it reads copies of the registers stored here by the 225184610Salfred * interrupt handler. 226192984Sthompsa */ 227184610Salfred u_char last_modem_status; /* last MSR read by intr handler */ 228184610Salfred u_char prev_modem_status; /* last MSR handled by high level */ 229184610Salfred 230184610Salfred u_char hotchar; /* ldisc-specific char to be handled ASAP */ 231184610Salfred u_char *ibuf; /* start of input buffer */ 232184610Salfred u_char *ibufend; /* end of input buffer */ 233192448Sthompsa u_char *ibufold; /* old input buffer, to be freed */ 234184610Salfred u_char *ihighwater; /* threshold in input buffer */ 235184610Salfred u_char *iptr; /* next free spot in input buffer */ 236184610Salfred int ibufsize; /* size of ibuf (not include error bytes) */ 237192448Sthompsa int ierroff; /* offset of error bytes in ibuf */ 238184610Salfred 239184610Salfred struct lbq obufq; /* head of queue of output buffers */ 240184610Salfred struct lbq obufs[2]; /* output buffers */ 241184610Salfred 242184610Salfred bus_space_tag_t bst; 243184610Salfred bus_space_handle_t bsh; 244184610Salfred 245184610Salfred Port_t data_port; /* i/o ports */ 246184610Salfred#ifdef COM_ESP 247190721Sthompsa Port_t esp_port; 248190721Sthompsa#endif 249190721Sthompsa Port_t int_id_port; 250184610Salfred Port_t modem_ctl_port; 251184610Salfred Port_t line_status_port; 252184610Salfred Port_t modem_status_port; 253184610Salfred Port_t intr_ctl_port; /* Ports of IIR register */ 254184610Salfred 255184610Salfred struct tty *tp; /* cross reference */ 256184610Salfred 257184610Salfred /* Initial state. */ 258184610Salfred struct termios it_in; /* should be in struct tty */ 259184610Salfred struct termios it_out; 260184610Salfred 261184610Salfred /* Lock state. */ 262184610Salfred struct termios lt_in; /* should be in struct tty */ 263192448Sthompsa struct termios lt_out; 264184610Salfred 265192448Sthompsa bool_t do_timestamp; 266184610Salfred bool_t do_dcd_timestamp; 267184610Salfred struct timeval timestamp; 268184610Salfred struct timeval dcd_timestamp; 269184610Salfred struct pps_state pps; 270184610Salfred 271184610Salfred u_long bytes_in; /* statistics */ 272190722Sthompsa u_long bytes_out; 273184610Salfred u_int delta_error_counts[CE_NTYPES]; 274184610Salfred u_long error_counts[CE_NTYPES]; 275184610Salfred 276184610Salfred struct resource *irqres; 277190722Sthompsa struct resource *ioportres; 278184610Salfred void *cookie; 279184610Salfred dev_t devs[6]; 280184610Salfred 281192448Sthompsa /* 282184610Salfred * Data area for output buffers. Someday we should build the output 283184610Salfred * buffer queue without copying data. 284184610Salfred */ 285192448Sthompsa u_char obuf1[256]; 286184610Salfred u_char obuf2[256]; 287184610Salfred}; 288184610Salfred 289184610Salfred#ifdef COM_ESP 290184610Salfredstatic int espattach __P((struct com_s *com, Port_t esp_port)); 291184610Salfred#endif 292184610Salfredstatic int sioattach __P((device_t dev, int rid)); 293184610Salfredstatic int sio_isa_attach __P((device_t dev)); 294184610Salfred 295184610Salfredstatic timeout_t siobusycheck; 296184610Salfredstatic timeout_t siodtrwakeup; 297184610Salfredstatic void comhardclose __P((struct com_s *com)); 298184610Salfredstatic void sioinput __P((struct com_s *com)); 299184610Salfredstatic void siointr1 __P((struct com_s *com)); 300192448Sthompsastatic void siointr __P((void *arg)); 301184610Salfredstatic int commctl __P((struct com_s *com, int bits, int how)); 302184610Salfredstatic int comparam __P((struct tty *tp, struct termios *t)); 303192448Sthompsastatic swihand_t siopoll; 304184610Salfredstatic int sioprobe __P((device_t dev, int xrid)); 305184610Salfredstatic int sio_isa_probe __P((device_t dev)); 306184610Salfredstatic void siosettimeout __P((void)); 307184610Salfredstatic int siosetwater __P((struct com_s *com, speed_t speed)); 308184610Salfredstatic void comstart __P((struct tty *tp)); 309184610Salfredstatic void comstop __P((struct tty *tp, int rw)); 310184610Salfredstatic timeout_t comwakeup; 311184610Salfredstatic void disc_optim __P((struct tty *tp, struct termios *t, 312184610Salfred struct com_s *com)); 313184610Salfred 314184610Salfred#if NCARD > 0 315184610Salfredstatic int sio_pccard_attach __P((device_t dev)); 316184610Salfredstatic int sio_pccard_detach __P((device_t dev)); 317184610Salfredstatic int sio_pccard_probe __P((device_t dev)); 318184610Salfred#endif /* NCARD > 0 */ 319184610Salfred 320190722Sthompsa#if NPCI > 0 321190722Sthompsastatic int sio_pci_attach __P((device_t dev)); 322190722Sthompsastatic void sio_pci_kludge_unit __P((device_t dev)); 323190722Sthompsastatic int sio_pci_probe __P((device_t dev)); 324192448Sthompsa#endif /* NPCI > 0 */ 325190722Sthompsa 326190722Sthompsastatic char driver_name[] = "sio"; 327192448Sthompsa 328190722Sthompsa/* table and macro for fast conversion from a unit number to its com struct */ 329190722Sthompsastatic devclass_t sio_devclass; 330190722Sthompsa#define com_addr(unit) ((struct com_s *) \ 331184610Salfred devclass_get_softc(sio_devclass, unit)) 332190721Sthompsa 333190721Sthompsastatic device_method_t sio_isa_methods[] = { 334190721Sthompsa /* Device interface */ 335190721Sthompsa DEVMETHOD(device_probe, sio_isa_probe), 336190721Sthompsa DEVMETHOD(device_attach, sio_isa_attach), 337190721Sthompsa 338190721Sthompsa { 0, 0 } 339190721Sthompsa}; 340190721Sthompsa 341190721Sthompsastatic driver_t sio_isa_driver = { 342184610Salfred driver_name, 343184610Salfred sio_isa_methods, 344184610Salfred sizeof(struct com_s), 345184610Salfred}; 346184610Salfred 347184610Salfred#if NCARD > 0 348184610Salfredstatic device_method_t sio_pccard_methods[] = { 349184610Salfred /* Device interface */ 350184610Salfred DEVMETHOD(device_probe, sio_pccard_probe), 351184610Salfred DEVMETHOD(device_attach, sio_pccard_attach), 352184610Salfred DEVMETHOD(device_detach, sio_pccard_detach), 353184610Salfred 354184610Salfred { 0, 0 } 355184610Salfred}; 356192984Sthompsa 357184610Salfredstatic driver_t sio_pccard_driver = { 358184610Salfred driver_name, 359184610Salfred sio_pccard_methods, 360184610Salfred sizeof(struct com_s), 361184610Salfred}; 362184610Salfred#endif /* NCARD > 0 */ 363184610Salfred 364184610Salfred#if NPCI > 0 365184610Salfredstatic device_method_t sio_pci_methods[] = { 366184610Salfred /* Device interface */ 367184610Salfred DEVMETHOD(device_probe, sio_pci_probe), 368192448Sthompsa DEVMETHOD(device_attach, sio_pci_attach), 369184610Salfred 370184610Salfred { 0, 0 } 371184610Salfred}; 372184610Salfred 373184610Salfredstatic driver_t sio_pci_driver = { 374192448Sthompsa driver_name, 375184610Salfred sio_pci_methods, 376184610Salfred sizeof(struct com_s), 377192448Sthompsa}; 378184610Salfred#endif /* NPCI > 0 */ 379184610Salfred 380184610Salfredstatic d_open_t sioopen; 381184610Salfredstatic d_close_t sioclose; 382184610Salfredstatic d_read_t sioread; 383184610Salfredstatic d_write_t siowrite; 384184610Salfredstatic d_ioctl_t sioioctl; 385184610Salfred 386184610Salfred#define CDEV_MAJOR 28 387184610Salfredstatic struct cdevsw sio_cdevsw = { 388184610Salfred /* open */ sioopen, 389184610Salfred /* close */ sioclose, 390184610Salfred /* read */ sioread, 391184610Salfred /* write */ siowrite, 392184610Salfred /* ioctl */ sioioctl, 393184610Salfred /* poll */ ttypoll, 394184610Salfred /* mmap */ nommap, 395184610Salfred /* strategy */ nostrategy, 396184610Salfred /* name */ driver_name, 397184610Salfred /* maj */ CDEV_MAJOR, 398184610Salfred /* dump */ nodump, 399184610Salfred /* psize */ nopsize, 400184610Salfred /* flags */ D_TTY, 401184610Salfred /* bmaj */ -1 402184610Salfred}; 403184610Salfred 404184610Salfredint comconsole = -1; 405184610Salfredstatic volatile speed_t comdefaultrate = CONSPEED; 406184610Salfred#ifdef __alpha__ 407184610Salfredstatic volatile speed_t gdbdefaultrate = CONSPEED; 408184610Salfred#endif 409184610Salfredstatic u_int com_events; /* input chars + weighted output completions */ 410184610Salfredstatic Port_t siocniobase; 411184610Salfred#ifndef __alpha__ 412184610Salfredstatic int siocnunit; 413192552Sthompsa#endif 414184610Salfredstatic Port_t siogdbiobase; 415184610Salfredstatic int siogdbunit = -1; 416192552Sthompsastatic bool_t sio_registered; 417184610Salfredstatic int sio_timeout; 418184610Salfredstatic int sio_timeouts_until_log; 419184610Salfredstatic struct callout_handle sio_timeout_handle 420184610Salfred = CALLOUT_HANDLE_INITIALIZER(&sio_timeout_handle); 421184610Salfredstatic int sio_numunits; 422192448Sthompsa 423184610Salfredstatic struct speedtab comspeedtab[] = { 424184610Salfred { 0, 0 }, 425192448Sthompsa { 50, COMBRD(50) }, 426184610Salfred { 75, COMBRD(75) }, 427184610Salfred { 110, COMBRD(110) }, 428184610Salfred { 134, COMBRD(134) }, 429184610Salfred { 150, COMBRD(150) }, 430184610Salfred { 200, COMBRD(200) }, 431184610Salfred { 300, COMBRD(300) }, 432184610Salfred { 600, COMBRD(600) }, 433184610Salfred { 1200, COMBRD(1200) }, 434184610Salfred { 1800, COMBRD(1800) }, 435184610Salfred { 2400, COMBRD(2400) }, 436184610Salfred { 4800, COMBRD(4800) }, 437184610Salfred { 9600, COMBRD(9600) }, 438184610Salfred { 19200, COMBRD(19200) }, 439184610Salfred { 38400, COMBRD(38400) }, 440184610Salfred { 57600, COMBRD(57600) }, 441184610Salfred { 115200, COMBRD(115200) }, 442184610Salfred { -1, -1 } 443184610Salfred}; 444184610Salfred 445184610Salfred#ifdef COM_ESP 446184610Salfred/* XXX configure this properly. */ 447184610Salfredstatic Port_t likely_com_ports[] = { 0x3f8, 0x2f8, 0x3e8, 0x2e8, }; 448184610Salfredstatic Port_t likely_esp_ports[] = { 0x140, 0x180, 0x280, 0 }; 449184610Salfred#endif 450184610Salfred 451184610Salfred/* 452184610Salfred * handle sysctl read/write requests for console speed 453184610Salfred * 454184610Salfred * In addition to setting comdefaultrate for I/O through /dev/console, 455184610Salfred * also set the initial and lock values for the /dev/ttyXX device 456184610Salfred * if there is one associated with the console. Finally, if the /dev/tty 457192448Sthompsa * device has already been open, change the speed on the open running port 458184610Salfred * itself. 459184610Salfred */ 460184610Salfred 461184610Salfredstatic int 462184610Salfredsysctl_machdep_comdefaultrate(SYSCTL_HANDLER_ARGS) 463184610Salfred{ 464184610Salfred int error, s; 465184610Salfred speed_t newspeed; 466184610Salfred struct com_s *com; 467192448Sthompsa struct tty *tp; 468184610Salfred 469184610Salfred newspeed = comdefaultrate; 470192448Sthompsa 471184610Salfred error = sysctl_handle_opaque(oidp, &newspeed, sizeof newspeed, req); 472184610Salfred if (error || !req->newptr) 473184610Salfred return (error); 474184610Salfred 475184610Salfred comdefaultrate = newspeed; 476184610Salfred 477184610Salfred if (comconsole < 0) /* serial console not selected? */ 478184610Salfred return (0); 479184610Salfred 480184610Salfred com = com_addr(comconsole); 481184610Salfred if (com == NULL) 482184610Salfred return (ENXIO); 483184610Salfred 484184610Salfred /* 485184610Salfred * set the initial and lock rates for /dev/ttydXX and /dev/cuaXX 486184610Salfred * (note, the lock rates really are boolean -- if non-zero, disallow 487184610Salfred * speed changes) 488184610Salfred */ 489192984Sthompsa com->it_in.c_ispeed = com->it_in.c_ospeed = 490184610Salfred com->lt_in.c_ispeed = com->lt_in.c_ospeed = 491184610Salfred com->it_out.c_ispeed = com->it_out.c_ospeed = 492184610Salfred com->lt_out.c_ispeed = com->lt_out.c_ospeed = comdefaultrate; 493184610Salfred 494184610Salfred /* 495184610Salfred * if we're open, change the running rate too 496184610Salfred */ 497184610Salfred tp = com->tp; 498192448Sthompsa if (tp && (tp->t_state & TS_ISOPEN)) { 499184610Salfred tp->t_termios.c_ispeed = 500184610Salfred tp->t_termios.c_ospeed = comdefaultrate; 501184610Salfred s = spltty(); 502184610Salfred error = comparam(tp, &tp->t_termios); 503184610Salfred splx(s); 504184610Salfred } 505192448Sthompsa return error; 506184610Salfred} 507184610Salfred 508184610SalfredSYSCTL_PROC(_machdep, OID_AUTO, conspeed, CTLTYPE_INT | CTLFLAG_RW, 509192448Sthompsa 0, 0, sysctl_machdep_comdefaultrate, "I", ""); 510184610Salfred 511184610Salfred#define SET_FLAG(dev, bit) device_set_flags(dev, device_get_flags(dev) | (bit)) 512184610Salfred#define CLR_FLAG(dev, bit) device_set_flags(dev, device_get_flags(dev) & ~(bit)) 513184610Salfred 514184610Salfred#if NCARD > 0 515184610Salfredstatic int 516184610Salfredsio_pccard_probe(dev) 517184610Salfred device_t dev; 518184610Salfred{ 519184610Salfred /* Do not probe IRQ - pccard doesn't turn on the interrupt line */ 520184610Salfred /* until bus_setup_intr */ 521184610Salfred SET_FLAG(dev, COM_C_NOPROBE); 522184610Salfred 523184610Salfred return (sioprobe(dev, 0)); 524184610Salfred} 525184610Salfred 526184610Salfredstatic int 527184610Salfredsio_pccard_attach(dev) 528184610Salfred device_t dev; 529184610Salfred{ 530184610Salfred return (sioattach(dev, 0)); 531184610Salfred} 532184610Salfred 533184610Salfred/* 534184610Salfred * sio_detach - unload the driver and clear the table. 535184610Salfred * XXX TODO: 536184610Salfred * This is usually called when the card is ejected, but 537184610Salfred * can be caused by a modunload of a controller driver. 538184610Salfred * The idea is to reset the driver's view of the device 539184610Salfred * and ensure that any driver entry points such as 540184610Salfred * read and write do not hang. 541184610Salfred */ 542184610Salfredstatic int 543184610Salfredsio_pccard_detach(dev) 544184610Salfred device_t dev; 545184610Salfred{ 546184610Salfred struct com_s *com; 547184610Salfred int i; 548184610Salfred 549184610Salfred com = (struct com_s *) device_get_softc(dev); 550184610Salfred if (com == NULL) { 551184610Salfred device_printf(dev, "NULL com in siounload\n"); 552184610Salfred return (0); 553184610Salfred } 554184610Salfred com->gone = 1; 555184610Salfred for (i = 0 ; i < 6; i++) 556192448Sthompsa destroy_dev(com->devs[i]); 557184610Salfred if (com->irqres) { 558184610Salfred bus_teardown_intr(dev, com->irqres, com->cookie); 559184610Salfred bus_release_resource(dev, SYS_RES_IRQ, 0, com->irqres); 560184610Salfred } 561184610Salfred if (com->ioportres) 562184610Salfred bus_release_resource(dev, SYS_RES_IOPORT, 0, com->ioportres); 563184610Salfred if (com->tp && (com->tp->t_state & TS_ISOPEN)) { 564184610Salfred device_printf(dev, "still open, forcing close\n"); 565184610Salfred com->tp->t_gen++; 566192448Sthompsa ttyclose(com->tp); 567184610Salfred ttwakeup(com->tp); 568184610Salfred ttwwakeup(com->tp); 569184610Salfred } else { 570192448Sthompsa if (com->ibuf != NULL) 571184610Salfred free(com->ibuf, M_DEVBUF); 572184610Salfred } 573184610Salfred device_printf(dev, "unloaded\n"); 574184610Salfred return (0); 575184610Salfred} 576192552Sthompsa#endif /* NCARD > 0 */ 577184610Salfred 578184610Salfred#if NPCI > 0 579192552Sthompsastruct pci_ids { 580184610Salfred u_int32_t type; 581184610Salfred const char *desc; 582184610Salfred int rid; 583184610Salfred}; 584184610Salfred 585184610Salfredstatic struct pci_ids pci_ids[] = { 586184610Salfred { 0x100812b9, "3COM PCI FaxModem", 0x10 }, 587184610Salfred { 0x048011c1, "ActionTec 56k FAX PCI Modem", 0x14 }, 588184610Salfred { 0x00000000, NULL, 0 } 589184610Salfred}; 590184610Salfred 591184610Salfredstatic int 592184610Salfredsio_pci_attach(dev) 593184610Salfred device_t dev; 594184610Salfred{ 595184610Salfred u_int32_t type; 596184610Salfred struct pci_ids *id; 597184610Salfred 598184610Salfred type = pci_get_devid(dev); 599184610Salfred id = pci_ids; 600184610Salfred while (id->type && id->type != type) 601184610Salfred id++; 602184610Salfred if (id->desc == NULL) 603192448Sthompsa return (ENXIO); 604184610Salfred sio_pci_kludge_unit(dev); 605184610Salfred return (sioattach(dev, id->rid)); 606184610Salfred} 607192448Sthompsa 608184610Salfred/* 609184610Salfred * Don't cut and paste this to other drivers. It is a horrible kludge 610184610Salfred * which will fail to work and also be unnecessary in future versions. 611192448Sthompsa */ 612184610Salfredstatic void 613184610Salfredsio_pci_kludge_unit(dev) 614184610Salfred device_t dev; 615184610Salfred{ 616184610Salfred devclass_t dc; 617184610Salfred int err; 618184610Salfred int start; 619184610Salfred int unit; 620184610Salfred 621184610Salfred unit = 0; 622184610Salfred start = 0; 623184610Salfred while (resource_int_value("sio", unit, "port", &start) == 0 && 624184610Salfred start > 0) 625184610Salfred unit++; 626184610Salfred if (device_get_unit(dev) < unit) { 627184610Salfred dc = device_get_devclass(dev); 628184610Salfred while (devclass_get_device(dc, unit)) 629184610Salfred unit++; 630184610Salfred device_printf(dev, "moving to sio%d\n", unit); 631184610Salfred err = device_set_unit(dev, unit); /* EVIL DO NOT COPY */ 632184610Salfred if (err) 633184610Salfred device_printf(dev, "error moving device %d\n", err); 634184610Salfred } 635184610Salfred} 636184610Salfred 637184610Salfredstatic int 638184610Salfredsio_pci_probe(dev) 639184610Salfred device_t dev; 640184610Salfred{ 641184610Salfred u_int32_t type; 642184610Salfred struct pci_ids *id; 643192984Sthompsa 644184610Salfred type = pci_get_devid(dev); 645184610Salfred id = pci_ids; 646184610Salfred while (id->type && id->type != type) 647184610Salfred id++; 648184610Salfred if (id->desc == NULL) 649184610Salfred return (ENXIO); 650184610Salfred device_set_desc(dev, id->desc); 651184610Salfred return (sioprobe(dev, id->rid)); 652184610Salfred} 653184610Salfred#endif /* NPCI > 0 */ 654184610Salfred 655184610Salfredstatic struct isa_pnp_id sio_ids[] = { 656184610Salfred {0x0005d041, "Standard PC COM port"}, /* PNP0500 */ 657184610Salfred {0x0105d041, "16550A-compatible COM port"}, /* PNP0501 */ 658184610Salfred {0x0205d041, "Multiport serial device (non-intelligent 16550)"}, /* PNP0502 */ 659184610Salfred {0x1005d041, "Generic IRDA-compatible device"}, /* PNP0510 */ 660184610Salfred {0x1105d041, "Generic IRDA-compatible device"}, /* PNP0511 */ 661184610Salfred /* Devices that do not have a compatid */ 662184610Salfred {0x12206804, NULL}, /* ACH2012 - 5634BTS 56K Video Ready Modem */ 663184610Salfred {0x7602a904, NULL}, /* AEI0276 - 56K v.90 Fax Modem (LKT) */ 664184610Salfred {0x00007905, NULL}, /* AKY0000 - 56K Plug&Play Modem */ 665184610Salfred {0x01405407, NULL}, /* AZT4001 - AZT3000 PnP SOUND DEVICE, MODEM */ 666184610Salfred {0x56039008, NULL}, /* BDP0356 - Best Data 56x2 */ 667184610Salfred {0x36339008, NULL}, /* BDP3336 - Best Data Prods. 336F */ 668184610Salfred {0x0014490a, NULL}, /* BRI1400 - Boca 33.6 PnP */ 669184610Salfred {0x0015490a, NULL}, /* BRI1500 - Internal Fax Data */ 670184610Salfred {0x0034490a, NULL}, /* BRI3400 - Internal ACF Modem */ 671184610Salfred {0x0094490a, NULL}, /* BRI9400 - Boca K56Flex PnP */ 672184610Salfred {0x00b4490a, NULL}, /* BRIB400 - Boca 56k PnP */ 673184610Salfred {0x0030320d, NULL}, /* CIR3000 - Cirrus Logic V43 */ 674184610Salfred {0x0100440e, NULL}, /* CRD0001 - Cardinal MVP288IV ? */ 675184610Salfred {0x36033610, NULL}, /* DAV0336 - DAVICOM 336PNP MODEM */ 676184610Salfred {0x0000aa1a, NULL}, /* FUJ0000 - FUJITSU Modem 33600 PNP/I2 */ 677184610Salfred {0x1200c31e, NULL}, /* GVC0012 - VF1128HV-R9 (win modem?) */ 678184610Salfred {0x0303c31e, NULL}, /* GVC0303 - MaxTech 33.6 PnP D/F/V */ 679184610Salfred {0x0505c31e, NULL}, /* GVC0505 - GVC 56k Faxmodem */ 680184610Salfred {0x0050c31e, NULL}, /* GVC5000 - some GVC modem */ 681184610Salfred {0x3800f91e, NULL}, /* GWY0038 - Telepath with v.90 */ 682184610Salfred {0x9062f91e, NULL}, /* GWY6290 - Telepath with x2 Technology */ 683184610Salfred {0x21002534, NULL}, /* MAE0021 - Jetstream Int V.90 56k Voice Series 2*/ 684184610Salfred {0x0000f435, NULL}, /* MOT0000 - Motorola ModemSURFR 33.6 Intern */ 685184610Salfred {0x5015f435, NULL}, /* MOT1550 - Motorola ModemSURFR 56K Modem */ 686184610Salfred {0xf015f435, NULL}, /* MOT15F0 - Motorola VoiceSURFR 56K Modem */ 687184610Salfred {0x6045f435, NULL}, /* MOT4560 - Motorola ? */ 688192984Sthompsa {0x61e7a338, NULL}, /* NECE761 - 33.6Modem */ 689184610Salfred {0x0f804f3f, NULL}, /* OZO800f - Zoom 2812 (56k Modem) */ 690184610Salfred {0x39804f3f, NULL}, /* OZO8039 - Zoom 56k flex */ 691184610Salfred {0x3024a341, NULL}, /* PMC2430 - Pace 56 Voice Internal Modem */ 692184610Salfred {0x1000eb49, NULL}, /* ROK0010 - Rockwell ? */ 693184610Salfred {0x5002734a, NULL}, /* RSS0250 - 5614Jx3(G) Internal Modem */ 694184610Salfred {0x6202734a, NULL}, /* RSS0262 - 5614Jx3[G] V90+K56Flex Modem */ 695184610Salfred {0xc100ad4d, NULL}, /* SMM00C1 - Leopard 56k PnP */ 696184610Salfred {0x9012b04e, NULL}, /* SUP1290 - Supra ? */ 697184610Salfred {0x1013b04e, NULL}, /* SUP1310 - SupraExpress 336i PnP */ 698184610Salfred {0x8013b04e, NULL}, /* SUP1380 - SupraExpress 288i PnP Voice */ 699184610Salfred {0x8113b04e, NULL}, /* SUP1381 - SupraExpress 336i PnP Voice */ 700184610Salfred {0x5016b04e, NULL}, /* SUP1650 - Supra 336i Sp Intl */ 701184610Salfred {0x7016b04e, NULL}, /* SUP1670 - Supra 336i V+ Intl */ 702184610Salfred {0x7420b04e, NULL}, /* SUP2070 - Supra ? */ 703184610Salfred {0x8020b04e, NULL}, /* SUP2080 - Supra ? */ 704184610Salfred {0x8420b04e, NULL}, /* SUP2084 - SupraExpress 56i PnP */ 705184610Salfred {0x7121b04e, NULL}, /* SUP2171 - SupraExpress 56i Sp? */ 706184610Salfred {0x8024b04e, NULL}, /* SUP2480 - Supra ? */ 707184610Salfred {0x01007256, NULL}, /* USR0001 - U.S. Robotics Inc., Sportster W */ 708184610Salfred {0x02007256, NULL}, /* USR0002 - U.S. Robotics Inc. Sportster 33. */ 709184610Salfred {0x04007256, NULL}, /* USR0004 - USR Sportster 14.4k */ 710184610Salfred {0x06007256, NULL}, /* USR0006 - USR Sportster 33.6k */ 711184610Salfred {0x11007256, NULL}, /* USR0011 - USR ? */ 712184610Salfred {0x01017256, NULL}, /* USR0101 - USR ? */ 713184610Salfred {0x30207256, NULL}, /* USR2030 - U.S.Robotics Inc. Sportster 560 */ 714184610Salfred {0x50207256, NULL}, /* USR2050 - U.S.Robotics Inc. Sportster 33. */ 715184610Salfred {0x70207256, NULL}, /* USR2070 - U.S.Robotics Inc. Sportster 560 */ 716184610Salfred {0x30307256, NULL}, /* USR3030 - U.S. Robotics 56K FAX INT */ 717184610Salfred {0x31307256, NULL}, /* USR3031 - U.S. Robotics 56K FAX INT */ 718184610Salfred {0x50307256, NULL}, /* USR3050 - U.S. Robotics 56K FAX INT */ 719184610Salfred {0x70307256, NULL}, /* USR3070 - U.S. Robotics 56K Voice INT */ 720184610Salfred {0x90307256, NULL}, /* USR3090 - USR ? */ 721184610Salfred {0x70917256, NULL}, /* USR9170 - U.S. Robotics 56K FAX INT */ 722184610Salfred {0x90917256, NULL}, /* USR9190 - USR 56k Voice INT */ 723184610Salfred {0x0300695c, NULL}, /* WCI0003 - Fax/Voice/Modem/Speakphone/Asvd */ 724184610Salfred {0x01a0896a, NULL}, /* ZTIA001 - Zoom Internal V90 Faxmodem */ 725184610Salfred {0x61f7896a, NULL}, /* ZTIF761 - Zoom ComStar 33.6 */ 726184824Sthompsa {0} 727184610Salfred}; 728184610Salfred 729184610Salfred 730184610Salfred 731184610Salfredstatic int 732184610Salfredsio_isa_probe(dev) 733184610Salfred device_t dev; 734184610Salfred{ 735184610Salfred /* Check isapnp ids */ 736184610Salfred if (ISA_PNP_PROBE(device_get_parent(dev), dev, sio_ids) == ENXIO) 737184610Salfred return (ENXIO); 738184610Salfred return (sioprobe(dev, 0)); 739184610Salfred} 740184610Salfred 741184610Salfredstatic int 742184610Salfredsioprobe(dev, xrid) 743184610Salfred device_t dev; 744184610Salfred int xrid; 745184610Salfred{ 746184610Salfred#if 0 747184610Salfred static bool_t already_init; 748184610Salfred device_t xdev; 749184610Salfred#endif 750184610Salfred struct com_s *com; 751184610Salfred bool_t failures[10]; 752184610Salfred int fn; 753184610Salfred device_t idev; 754184610Salfred Port_t iobase; 755184610Salfred intrmask_t irqmap[4]; 756184610Salfred intrmask_t irqs; 757184610Salfred u_char mcr_image; 758184610Salfred int result; 759184610Salfred u_long xirq; 760184610Salfred u_int flags = device_get_flags(dev); 761184610Salfred int rid; 762184610Salfred struct resource *port; 763184610Salfred int intrsave; 764184610Salfred 765184610Salfred rid = xrid; 766184610Salfred port = bus_alloc_resource(dev, SYS_RES_IOPORT, &rid, 767184610Salfred 0, ~0, IO_COMSIZE, RF_ACTIVE); 768184610Salfred if (!port) 769184610Salfred return (ENXIO); 770184610Salfred 771184610Salfred com = device_get_softc(dev); 772184610Salfred com->bst = rman_get_bustag(port); 773184610Salfred com->bsh = rman_get_bushandle(port); 774184610Salfred 775184610Salfred#if 0 776184610Salfred /* 777184610Salfred * XXX this is broken - when we are first called, there are no 778184610Salfred * previously configured IO ports. We could hard code 779184610Salfred * 0x3f8, 0x2f8, 0x3e8, 0x2e8 etc but that's probably worse. 780184610Salfred * This code has been doing nothing since the conversion since 781184610Salfred * "count" is zero the first time around. 782184610Salfred */ 783190735Sthompsa if (!already_init) { 784184610Salfred /* 785184610Salfred * Turn off MCR_IENABLE for all likely serial ports. An unused 786184610Salfred * port with its MCR_IENABLE gate open will inhibit interrupts 787184610Salfred * from any used port that shares the interrupt vector. 788184610Salfred * XXX the gate enable is elsewhere for some multiports. 789184610Salfred */ 790184610Salfred device_t *devs; 791184610Salfred int count, i, xioport; 792184610Salfred 793184610Salfred devclass_get_devices(sio_devclass, &devs, &count); 794184610Salfred for (i = 0; i < count; i++) { 795184824Sthompsa xdev = devs[i]; 796184610Salfred if (device_is_enabled(xdev) && 797184610Salfred bus_get_resource(xdev, SYS_RES_IOPORT, 0, &xioport, 798184610Salfred NULL) == 0) 799184610Salfred outb(xioport + com_mcr, 0); 800184610Salfred } 801184610Salfred free(devs, M_TEMP); 802184610Salfred already_init = TRUE; 803184610Salfred } 804184610Salfred#endif 805184610Salfred 806184610Salfred if (COM_LLCONSOLE(flags)) { 807184610Salfred printf("sio%d: reserved for low-level i/o\n", 808184610Salfred device_get_unit(dev)); 809184610Salfred bus_release_resource(dev, SYS_RES_IOPORT, rid, port); 810184610Salfred return (ENXIO); 811184610Salfred } 812184610Salfred 813184610Salfred /* 814184610Salfred * If the device is on a multiport card and has an AST/4 815184610Salfred * compatible interrupt control register, initialize this 816192552Sthompsa * register and prepare to leave MCR_IENABLE clear in the mcr. 817192552Sthompsa * Otherwise, prepare to set MCR_IENABLE in the mcr. 818184610Salfred * Point idev to the device struct giving the correct id_irq. 819184610Salfred * This is the struct for the master device if there is one. 820184610Salfred */ 821184610Salfred idev = dev; 822184610Salfred mcr_image = MCR_IENABLE; 823192984Sthompsa#ifdef COM_MULTIPORT 824184610Salfred if (COM_ISMULTIPORT(flags)) { 825184610Salfred Port_t xiobase; 826184610Salfred u_long io; 827184610Salfred 828184610Salfred idev = devclass_get_device(sio_devclass, COM_MPMASTER(flags)); 829184610Salfred if (idev == NULL) { 830184610Salfred printf("sio%d: master device %d not configured\n", 831184610Salfred device_get_unit(dev), COM_MPMASTER(flags)); 832184610Salfred idev = dev; 833187173Sthompsa } 834184610Salfred if (!COM_NOTAST4(flags)) { 835184610Salfred if (bus_get_resource(idev, SYS_RES_IOPORT, 0, &io, 836184610Salfred NULL) == 0) { 837184610Salfred xiobase = io; 838184610Salfred if (bus_get_resource(idev, SYS_RES_IRQ, 0, 839184610Salfred NULL, NULL) == 0) 840184610Salfred outb(xiobase + com_scr, 0x80); 841184610Salfred else 842184610Salfred outb(xiobase + com_scr, 0); 843184610Salfred } 844184610Salfred mcr_image = 0; 845190183Sthompsa } 846184610Salfred } 847192552Sthompsa#endif /* COM_MULTIPORT */ 848184610Salfred if (bus_get_resource(idev, SYS_RES_IRQ, 0, NULL, NULL) != 0) 849187173Sthompsa mcr_image = 0; 850184610Salfred 851184610Salfred bzero(failures, sizeof failures); 852184610Salfred iobase = rman_get_start(port); 853184610Salfred 854184610Salfred /* 855184610Salfred * We don't want to get actual interrupts, just masked ones. 856184610Salfred * Interrupts from this line should already be masked in the ICU, 857184610Salfred * but mask them in the processor as well in case there are some 858184610Salfred * (misconfigured) shared interrupts. 859184610Salfred */ 860184610Salfred intrsave = save_intr(); 861190183Sthompsa disable_intr(); 862190183Sthompsa COM_LOCK(); 863190183Sthompsa/* EXTRA DELAY? */ 864190183Sthompsa 865190183Sthompsa /* 866190183Sthompsa * Initialize the speed and the word size and wait long enough to 867184610Salfred * drain the maximum of 16 bytes of junk in device output queues. 868184610Salfred * The speed is undefined after a master reset and must be set 869184610Salfred * before relying on anything related to output. There may be 870184610Salfred * junk after a (very fast) soft reboot and (apparently) after 871184610Salfred * master reset. 872184610Salfred * XXX what about the UART bug avoided by waiting in comparam()? 873184610Salfred * We don't want to to wait long enough to drain at 2 bps. 874184610Salfred */ 875184610Salfred if (iobase == siocniobase) 876184610Salfred DELAY((16 + 1) * 1000000 / (comdefaultrate / 10)); 877184610Salfred else { 878184610Salfred sio_setreg(com, com_cfcr, CFCR_DLAB | CFCR_8BITS); 879184610Salfred sio_setreg(com, com_dlbl, COMBRD(SIO_TEST_SPEED) & 0xff); 880184610Salfred sio_setreg(com, com_dlbh, (u_int) COMBRD(SIO_TEST_SPEED) >> 8); 881184610Salfred sio_setreg(com, com_cfcr, CFCR_8BITS); 882184610Salfred DELAY((16 + 1) * 1000000 / (SIO_TEST_SPEED / 10)); 883184610Salfred } 884184610Salfred 885184610Salfred /* 886184610Salfred * Enable the interrupt gate and disable device interupts. This 887184610Salfred * should leave the device driving the interrupt line low and 888184610Salfred * guarantee an edge trigger if an interrupt can be generated. 889184610Salfred */ 890184610Salfred/* EXTRA DELAY? */ 891184610Salfred sio_setreg(com, com_mcr, mcr_image); 892184610Salfred sio_setreg(com, com_ier, 0); 893184610Salfred DELAY(1000); /* XXX */ 894190183Sthompsa irqmap[0] = isa_irq_pending(); 895190183Sthompsa 896190183Sthompsa /* 897190183Sthompsa * Attempt to set loopback mode so that we can send a null byte 898190183Sthompsa * without annoying any external device. 899190183Sthompsa */ 900190183Sthompsa/* EXTRA DELAY? */ 901184610Salfred sio_setreg(com, com_mcr, mcr_image | MCR_LOOPBACK); 902184610Salfred 903184610Salfred /* 904184610Salfred * Attempt to generate an output interrupt. On 8250's, setting 905184610Salfred * IER_ETXRDY generates an interrupt independent of the current 906184610Salfred * setting and independent of whether the THR is empty. On 16450's, 907184610Salfred * setting IER_ETXRDY generates an interrupt independent of the 908184610Salfred * current setting. On 16550A's, setting IER_ETXRDY only 909184610Salfred * generates an interrupt when IER_ETXRDY is not already set. 910184610Salfred */ 911184610Salfred sio_setreg(com, com_ier, IER_ETXRDY); 912184610Salfred 913184610Salfred /* 914184610Salfred * On some 16x50 incompatibles, setting IER_ETXRDY doesn't generate 915184610Salfred * an interrupt. They'd better generate one for actually doing 916184610Salfred * output. Loopback may be broken on the same incompatibles but 917184610Salfred * it's unlikely to do more than allow the null byte out. 918184610Salfred */ 919184610Salfred sio_setreg(com, com_data, 0); 920184610Salfred DELAY((1 + 2) * 1000000 / (SIO_TEST_SPEED / 10)); 921184610Salfred 922184610Salfred /* 923184610Salfred * Turn off loopback mode so that the interrupt gate works again 924184610Salfred * (MCR_IENABLE was hidden). This should leave the device driving 925190183Sthompsa * an interrupt line high. It doesn't matter if the interrupt 926190183Sthompsa * line oscillates while we are not looking at it, since interrupts 927184610Salfred * are disabled. 928184610Salfred */ 929190183Sthompsa/* EXTRA DELAY? */ 930190183Sthompsa sio_setreg(com, com_mcr, mcr_image); 931184610Salfred 932184610Salfred /* 933190183Sthompsa * Some pcmcia cards have the "TXRDY bug", so we check everyone 934184610Salfred * for IIR_TXRDY implementation ( Palido 321s, DC-1S... ) 935190183Sthompsa */ 936190183Sthompsa if (COM_NOPROBE(flags)) { 937190183Sthompsa /* Reading IIR register twice */ 938190183Sthompsa for (fn = 0; fn < 2; fn ++) { 939190183Sthompsa DELAY(10000); 940190183Sthompsa failures[6] = sio_getreg(com, com_iir); 941190183Sthompsa } 942190183Sthompsa /* Check IIR_TXRDY clear ? */ 943190183Sthompsa result = 0; 944190183Sthompsa if (failures[6] & IIR_TXRDY) { 945190183Sthompsa /* Nop, Double check with clearing IER */ 946190183Sthompsa sio_setreg(com, com_ier, 0); 947190183Sthompsa if (sio_getreg(com, com_iir) & IIR_NOPEND) { 948190183Sthompsa /* Ok. we're familia this gang */ 949184610Salfred SET_FLAG(dev, COM_C_IIR_TXRDYBUG); 950184610Salfred } else { 951184610Salfred /* Unknown, Just omit this chip.. XXX */ 952184610Salfred result = ENXIO; 953190183Sthompsa } 954190183Sthompsa } else { 955190183Sthompsa /* OK. this is well-known guys */ 956190183Sthompsa CLR_FLAG(dev, COM_C_IIR_TXRDYBUG); 957190183Sthompsa } 958184610Salfred sio_setreg(com, com_cfcr, CFCR_8BITS); 959184610Salfred COM_UNLOCK(); 960184610Salfred restore_intr(intrsave); 961184610Salfred bus_release_resource(dev, SYS_RES_IOPORT, rid, port); 962184610Salfred return (iobase == siocniobase ? 0 : result); 963184610Salfred } 964184610Salfred 965184610Salfred /* 966184610Salfred * Check that 967184610Salfred * o the CFCR, IER and MCR in UART hold the values written to them 968192984Sthompsa * (the values happen to be all distinct - this is good for 969184610Salfred * avoiding false positive tests from bus echoes). 970184610Salfred * o an output interrupt is generated and its vector is correct. 971184610Salfred * o the interrupt goes away when the IIR in the UART is read. 972187173Sthompsa */ 973184610Salfred/* EXTRA DELAY? */ 974184610Salfred failures[0] = sio_getreg(com, com_cfcr) - CFCR_8BITS; 975184610Salfred failures[1] = sio_getreg(com, com_ier) - IER_ETXRDY; 976184610Salfred failures[2] = sio_getreg(com, com_mcr) - mcr_image; 977184610Salfred DELAY(10000); /* Some internal modems need this time */ 978184610Salfred irqmap[1] = isa_irq_pending(); 979192984Sthompsa failures[4] = (sio_getreg(com, com_iir) & IIR_IMASK) - IIR_TXRDY; 980184610Salfred DELAY(1000); /* XXX */ 981187173Sthompsa irqmap[2] = isa_irq_pending(); 982184610Salfred failures[6] = (sio_getreg(com, com_iir) & IIR_IMASK) - IIR_NOPEND; 983184610Salfred 984184610Salfred /* 985184610Salfred * Turn off all device interrupts and check that they go off properly. 986184610Salfred * Leave MCR_IENABLE alone. For ports without a master port, it gates 987184610Salfred * the OUT2 output of the UART to 988184610Salfred * the ICU input. Closing the gate would give a floating ICU input 989184610Salfred * (unless there is another device driving it) and spurious interrupts. 990184610Salfred * (On the system that this was first tested on, the input floats high 991184610Salfred * and gives a (masked) interrupt as soon as the gate is closed.) 992184610Salfred */ 993184610Salfred sio_setreg(com, com_ier, 0); 994184610Salfred sio_setreg(com, com_cfcr, CFCR_8BITS); /* dummy to avoid bus echo */ 995184610Salfred failures[7] = sio_getreg(com, com_ier); 996184610Salfred DELAY(1000); /* XXX */ 997184610Salfred irqmap[3] = isa_irq_pending(); 998184610Salfred failures[9] = (sio_getreg(com, com_iir) & IIR_IMASK) - IIR_NOPEND; 999184610Salfred 1000184610Salfred COM_UNLOCK(); 1001184610Salfred restore_intr(intrsave); 1002184610Salfred 1003184610Salfred irqs = irqmap[1] & ~irqmap[0]; 1004184610Salfred if (bus_get_resource(idev, SYS_RES_IRQ, 0, &xirq, NULL) == 0 && 1005184610Salfred ((1 << xirq) & irqs) == 0) 1006184610Salfred printf( 1007184610Salfred "sio%d: configured irq %ld not in bitmap of probed irqs %#x\n", 1008184610Salfred device_get_unit(dev), xirq, irqs); 1009184610Salfred if (bootverbose) 1010184610Salfred printf("sio%d: irq maps: %#x %#x %#x %#x\n", 1011184610Salfred device_get_unit(dev), 1012184610Salfred irqmap[0], irqmap[1], irqmap[2], irqmap[3]); 1013184610Salfred 1014184610Salfred result = 0; 1015184610Salfred for (fn = 0; fn < sizeof failures; ++fn) 1016184610Salfred if (failures[fn]) { 1017184610Salfred sio_setreg(com, com_mcr, 0); 1018192984Sthompsa result = ENXIO; 1019184610Salfred if (bootverbose) { 1020184610Salfred printf("sio%d: probe failed test(s):", 1021184610Salfred device_get_unit(dev)); 1022184610Salfred for (fn = 0; fn < sizeof failures; ++fn) 1023184610Salfred if (failures[fn]) 1024184610Salfred printf(" %d", fn); 1025184610Salfred printf("\n"); 1026184610Salfred } 1027184610Salfred break; 1028184610Salfred } 1029184610Salfred bus_release_resource(dev, SYS_RES_IOPORT, rid, port); 1030184610Salfred return (iobase == siocniobase ? 0 : result); 1031184610Salfred} 1032184610Salfred 1033187173Sthompsa#ifdef COM_ESP 1034184610Salfredstatic int 1035184610Salfredespattach(com, esp_port) 1036184610Salfred struct com_s *com; 1037184610Salfred Port_t esp_port; 1038184610Salfred{ 1039184610Salfred u_char dips; 1040184610Salfred u_char val; 1041184610Salfred 1042184610Salfred /* 1043184610Salfred * Check the ESP-specific I/O port to see if we're an ESP 1044190735Sthompsa * card. If not, return failure immediately. 1045184610Salfred */ 1046184610Salfred if ((inb(esp_port) & 0xf3) == 0) { 1047184610Salfred printf(" port 0x%x is not an ESP board?\n", esp_port); 1048184824Sthompsa return (0); 1049184610Salfred } 1050184610Salfred 1051184610Salfred /* 1052184610Salfred * We've got something that claims to be a Hayes ESP card. 1053190735Sthompsa * Let's hope so. 1054190735Sthompsa */ 1055184610Salfred 1056184610Salfred /* Get the dip-switch configuration */ 1057184610Salfred outb(esp_port + ESP_CMD1, ESP_GETDIPS); 1058192984Sthompsa dips = inb(esp_port + ESP_STATUS1); 1059184610Salfred 1060184610Salfred /* 1061184610Salfred * Bits 0,1 of dips say which COM port we are. 1062184610Salfred */ 1063184610Salfred if (rman_get_start(com->ioportres) == likely_com_ports[dips & 0x03]) 1064184610Salfred printf(" : ESP"); 1065184610Salfred else { 1066184610Salfred printf(" esp_port has com %d\n", dips & 0x03); 1067184610Salfred return (0); 1068184610Salfred } 1069184610Salfred 1070184610Salfred /* 1071184610Salfred * Check for ESP version 2.0 or later: bits 4,5,6 = 010. 1072184610Salfred */ 1073184610Salfred outb(esp_port + ESP_CMD1, ESP_GETTEST); 1074184610Salfred val = inb(esp_port + ESP_STATUS1); /* clear reg 1 */ 1075184610Salfred val = inb(esp_port + ESP_STATUS2); 1076184610Salfred if ((val & 0x70) < 0x20) { 1077184610Salfred printf("-old (%o)", val & 0x70); 1078184610Salfred return (0); 1079184610Salfred } 1080184610Salfred 1081184610Salfred /* 1082184610Salfred * Check for ability to emulate 16550: bit 7 == 1 1083184610Salfred */ 1084184610Salfred if ((dips & 0x80) == 0) { 1085184610Salfred printf(" slave"); 1086184610Salfred return (0); 1087184610Salfred } 1088184610Salfred 1089184610Salfred /* 1090184610Salfred * Okay, we seem to be a Hayes ESP card. Whee. 1091184610Salfred */ 1092184610Salfred com->esp = TRUE; 1093184610Salfred com->esp_port = esp_port; 1094184610Salfred return (1); 1095184610Salfred} 1096184610Salfred#endif /* COM_ESP */ 1097184610Salfred 1098184610Salfredstatic int 1099184610Salfredsio_isa_attach(dev) 1100184610Salfred device_t dev; 1101184610Salfred{ 1102184610Salfred return (sioattach(dev, 0)); 1103184610Salfred} 1104184610Salfred 1105184610Salfredstatic int 1106184610Salfredsioattach(dev, xrid) 1107184610Salfred device_t dev; 1108184610Salfred int xrid; 1109184610Salfred{ 1110184610Salfred struct com_s *com; 1111184610Salfred#ifdef COM_ESP 1112184610Salfred Port_t *espp; 1113184610Salfred#endif 1114184610Salfred Port_t iobase; 1115184610Salfred int unit; 1116184610Salfred u_int flags; 1117184610Salfred int rid; 1118184610Salfred struct resource *port; 1119184610Salfred int ret; 1120184610Salfred int intrstate; 1121184610Salfred 1122192984Sthompsa rid = xrid; 1123184610Salfred port = bus_alloc_resource(dev, SYS_RES_IOPORT, &rid, 1124184610Salfred 0, ~0, IO_COMSIZE, RF_ACTIVE); 1125184610Salfred if (!port) 1126184610Salfred return (ENXIO); 1127184610Salfred 1128184610Salfred iobase = rman_get_start(port); 1129184610Salfred unit = device_get_unit(dev); 1130184610Salfred com = device_get_softc(dev); 1131184610Salfred flags = device_get_flags(dev); 1132184610Salfred 1133184610Salfred if (unit >= sio_numunits) 1134184610Salfred sio_numunits = unit + 1; 1135184610Salfred /* 1136184610Salfred * sioprobe() has initialized the device registers as follows: 1137184610Salfred * o cfcr = CFCR_8BITS. 1138184610Salfred * It is most important that CFCR_DLAB is off, so that the 1139184610Salfred * data port is not hidden when we enable interrupts. 1140184610Salfred * o ier = 0. 1141184610Salfred * Interrupts are only enabled when the line is open. 1142184610Salfred * o mcr = MCR_IENABLE, or 0 if the port has AST/4 compatible 1143184610Salfred * interrupt control register or the config specifies no irq. 1144184610Salfred * Keeping MCR_DTR and MCR_RTS off might stop the external 1145184610Salfred * device from sending before we are ready. 1146184610Salfred */ 1147184610Salfred bzero(com, sizeof *com); 1148184610Salfred com->unit = unit; 1149184610Salfred com->ioportres = port; 1150184610Salfred com->bst = rman_get_bustag(port); 1151184610Salfred com->bsh = rman_get_bushandle(port); 1152184610Salfred com->cfcr_image = CFCR_8BITS; 1153184610Salfred com->dtr_wait = 3 * hz; 1154184610Salfred com->loses_outints = COM_LOSESOUTINTS(flags) != 0; 1155184610Salfred com->no_irq = bus_get_resource(dev, SYS_RES_IRQ, 0, NULL, NULL) != 0; 1156184610Salfred com->tx_fifo_size = 1; 1157184610Salfred com->obufs[0].l_head = com->obuf1; 1158184610Salfred com->obufs[1].l_head = com->obuf2; 1159184610Salfred 1160184610Salfred com->data_port = iobase + com_data; 1161184610Salfred com->int_id_port = iobase + com_iir; 1162184610Salfred com->modem_ctl_port = iobase + com_mcr; 1163184610Salfred com->mcr_image = inb(com->modem_ctl_port); 1164184610Salfred com->line_status_port = iobase + com_lsr; 1165184610Salfred com->modem_status_port = iobase + com_msr; 1166184610Salfred com->intr_ctl_port = iobase + com_ier; 1167184610Salfred 1168184610Salfred /* 1169184610Salfred * We don't use all the flags from <sys/ttydefaults.h> since they 1170184610Salfred * are only relevant for logins. It's important to have echo off 1171192984Sthompsa * initially so that the line doesn't start blathering before the 1172184610Salfred * echo flag can be turned off. 1173187173Sthompsa */ 1174184610Salfred com->it_in.c_iflag = 0; 1175184610Salfred com->it_in.c_oflag = 0; 1176184610Salfred com->it_in.c_cflag = TTYDEF_CFLAG; 1177184610Salfred com->it_in.c_lflag = 0; 1178192499Sthompsa if (unit == comconsole) { 1179184610Salfred com->it_in.c_iflag = TTYDEF_IFLAG; 1180184610Salfred com->it_in.c_oflag = TTYDEF_OFLAG; 1181184610Salfred com->it_in.c_cflag = TTYDEF_CFLAG | CLOCAL; 1182184610Salfred com->it_in.c_lflag = TTYDEF_LFLAG; 1183184610Salfred com->lt_out.c_cflag = com->lt_in.c_cflag = CLOCAL; 1184184610Salfred com->lt_out.c_ispeed = com->lt_out.c_ospeed = 1185184610Salfred com->lt_in.c_ispeed = com->lt_in.c_ospeed = 1186192984Sthompsa com->it_in.c_ispeed = com->it_in.c_ospeed = comdefaultrate; 1187192984Sthompsa } else 1188184610Salfred com->it_in.c_ispeed = com->it_in.c_ospeed = TTYDEF_SPEED; 1189184610Salfred intrstate = save_intr(); 1190184610Salfred if (siosetwater(com, com->it_in.c_ispeed) != 0) { 1191184610Salfred COM_UNLOCK(); 1192184610Salfred restore_intr(intrstate); 1193184610Salfred /* 1194184610Salfred * Leave i/o resources allocated if this is a `cn'-level 1195184824Sthompsa * console, so that other devices can't snarf them. 1196184610Salfred */ 1197184610Salfred if (iobase != siocniobase) 1198184610Salfred bus_release_resource(dev, SYS_RES_IOPORT, rid, port); 1199184610Salfred return (ENOMEM); 1200184610Salfred } 1201184610Salfred COM_UNLOCK(); 1202184610Salfred restore_intr(intrstate); 1203184610Salfred termioschars(&com->it_in); 1204184610Salfred com->it_out = com->it_in; 1205184610Salfred 1206184610Salfred /* attempt to determine UART type */ 1207184610Salfred printf("sio%d: type", unit); 1208184610Salfred 1209184610Salfred 1210184610Salfred#ifdef COM_MULTIPORT 1211184610Salfred if (!COM_ISMULTIPORT(flags) && !COM_IIR_TXRDYBUG(flags)) 1212184610Salfred#else 1213184610Salfred if (!COM_IIR_TXRDYBUG(flags)) 1214184610Salfred#endif 1215184610Salfred { 1216184610Salfred u_char scr; 1217184610Salfred u_char scr1; 1218184610Salfred u_char scr2; 1219184610Salfred 1220184610Salfred scr = sio_getreg(com, com_scr); 1221184610Salfred sio_setreg(com, com_scr, 0xa5); 1222184610Salfred scr1 = sio_getreg(com, com_scr); 1223184610Salfred sio_setreg(com, com_scr, 0x5a); 1224184610Salfred scr2 = sio_getreg(com, com_scr); 1225184610Salfred sio_setreg(com, com_scr, scr); 1226184610Salfred if (scr1 != 0xa5 || scr2 != 0x5a) { 1227184610Salfred printf(" 8250"); 1228184610Salfred goto determined_type; 1229184610Salfred } 1230184610Salfred } 1231184610Salfred sio_setreg(com, com_fifo, FIFO_ENABLE | FIFO_RX_HIGH); 1232184610Salfred DELAY(100); 1233184610Salfred com->st16650a = 0; 1234184610Salfred switch (inb(com->int_id_port) & IIR_FIFO_MASK) { 1235184610Salfred case FIFO_RX_LOW: 1236184610Salfred printf(" 16450"); 1237184610Salfred break; 1238184610Salfred case FIFO_RX_MEDL: 1239184610Salfred printf(" 16450?"); 1240184610Salfred break; 1241184610Salfred case FIFO_RX_MEDH: 1242184610Salfred printf(" 16550?"); 1243184610Salfred break; 1244184610Salfred case FIFO_RX_HIGH: 1245184610Salfred if (COM_NOFIFO(flags)) { 1246184610Salfred printf(" 16550A fifo disabled"); 1247184610Salfred } else { 1248184610Salfred com->hasfifo = TRUE; 1249184610Salfred if (COM_ST16650A(flags)) { 1250184610Salfred com->st16650a = 1; 1251184610Salfred com->tx_fifo_size = 32; 1252184610Salfred printf(" ST16650A"); 1253184610Salfred } else { 1254184610Salfred com->tx_fifo_size = COM_FIFOSIZE(flags); 1255184610Salfred printf(" 16550A"); 1256184610Salfred } 1257184610Salfred } 1258184610Salfred#ifdef COM_ESP 1259184610Salfred for (espp = likely_esp_ports; *espp != 0; espp++) 1260184610Salfred if (espattach(com, *espp)) { 1261184610Salfred com->tx_fifo_size = 1024; 1262184610Salfred break; 1263184610Salfred } 1264184610Salfred#endif 1265184610Salfred if (!com->st16650a) { 1266184610Salfred if (!com->tx_fifo_size) 1267184610Salfred com->tx_fifo_size = 16; 1268184610Salfred else 1269184610Salfred printf(" lookalike with %d bytes FIFO", 1270184610Salfred com->tx_fifo_size); 1271184610Salfred } 1272184610Salfred 1273184610Salfred break; 1274192984Sthompsa } 1275184610Salfred 1276184610Salfred#ifdef COM_ESP 1277192984Sthompsa if (com->esp) { 1278184610Salfred /* 1279184824Sthompsa * Set 16550 compatibility mode. 1280184610Salfred * We don't use the ESP_MODE_SCALE bit to increase the 1281184610Salfred * fifo trigger levels because we can't handle large 1282184610Salfred * bursts of input. 1283184610Salfred * XXX flow control should be set in comparam(), not here. 1284192499Sthompsa */ 1285184610Salfred outb(com->esp_port + ESP_CMD1, ESP_SETMODE); 1286184610Salfred outb(com->esp_port + ESP_CMD2, ESP_MODE_RTS | ESP_MODE_FIFO); 1287184610Salfred 1288184610Salfred /* Set RTS/CTS flow control. */ 1289184610Salfred outb(com->esp_port + ESP_CMD1, ESP_SETFLOWTYPE); 1290184610Salfred outb(com->esp_port + ESP_CMD2, ESP_FLOW_RTS); 1291184610Salfred outb(com->esp_port + ESP_CMD2, ESP_FLOW_CTS); 1292184610Salfred 1293184610Salfred /* Set flow-control levels. */ 1294184610Salfred outb(com->esp_port + ESP_CMD1, ESP_SETRXFLOW); 1295184610Salfred outb(com->esp_port + ESP_CMD2, HIBYTE(768)); 1296184610Salfred outb(com->esp_port + ESP_CMD2, LOBYTE(768)); 1297184610Salfred outb(com->esp_port + ESP_CMD2, HIBYTE(512)); 1298184610Salfred outb(com->esp_port + ESP_CMD2, LOBYTE(512)); 1299184610Salfred } 1300184610Salfred#endif /* COM_ESP */ 1301184610Salfred sio_setreg(com, com_fifo, 0); 1302184610Salfreddetermined_type: ; 1303184610Salfred 1304192984Sthompsa#ifdef COM_MULTIPORT 1305184610Salfred if (COM_ISMULTIPORT(flags)) { 1306184610Salfred device_t masterdev; 1307184610Salfred 1308184610Salfred com->multiport = TRUE; 1309184610Salfred printf(" (multiport"); 1310184610Salfred if (unit == COM_MPMASTER(flags)) 1311184610Salfred printf(" master"); 1312184610Salfred printf(")"); 1313184610Salfred masterdev = devclass_get_device(sio_devclass, 1314184824Sthompsa COM_MPMASTER(flags)); 1315184610Salfred com->no_irq = (masterdev == NULL || bus_get_resource(masterdev, 1316184610Salfred SYS_RES_IRQ, 0, NULL, NULL) != 0); 1317184610Salfred } 1318184610Salfred#endif /* COM_MULTIPORT */ 1319184610Salfred if (unit == comconsole) 1320184610Salfred printf(", console"); 1321184610Salfred if (COM_IIR_TXRDYBUG(flags)) 1322184610Salfred printf(" with a bogus IIR_TXRDY register"); 1323184610Salfred printf("\n"); 1324184610Salfred 1325184610Salfred if (!sio_registered) { 1326184610Salfred register_swi(SWI_TTY, siopoll); 1327184610Salfred sio_registered = TRUE; 1328184610Salfred } 1329184610Salfred com->devs[0] = make_dev(&sio_cdevsw, unit, 1330184610Salfred UID_ROOT, GID_WHEEL, 0600, "ttyd%r", unit); 1331184610Salfred com->devs[1] = make_dev(&sio_cdevsw, unit | CONTROL_INIT_STATE, 1332184610Salfred UID_ROOT, GID_WHEEL, 0600, "ttyid%r", unit); 1333184824Sthompsa com->devs[2] = make_dev(&sio_cdevsw, unit | CONTROL_LOCK_STATE, 1334184610Salfred UID_ROOT, GID_WHEEL, 0600, "ttyld%r", unit); 1335184610Salfred com->devs[3] = make_dev(&sio_cdevsw, unit | CALLOUT_MASK, 1336184610Salfred UID_UUCP, GID_DIALER, 0660, "cuaa%r", unit); 1337184610Salfred com->devs[4] = make_dev(&sio_cdevsw, 1338184610Salfred unit | CALLOUT_MASK | CONTROL_INIT_STATE, 1339184610Salfred UID_UUCP, GID_DIALER, 0660, "cuaia%r", unit); 1340184610Salfred com->devs[5] = make_dev(&sio_cdevsw, 1341184610Salfred unit | CALLOUT_MASK | CONTROL_LOCK_STATE, 1342184610Salfred UID_UUCP, GID_DIALER, 0660, "cuala%r", unit); 1343184610Salfred com->flags = flags; 1344188409Sthompsa com->pps.ppscap = PPS_CAPTUREASSERT | PPS_CAPTURECLEAR; 1345184610Salfred pps_init(&com->pps); 1346184610Salfred 1347184610Salfred rid = 0; 1348184610Salfred com->irqres = bus_alloc_resource(dev, SYS_RES_IRQ, &rid, 0ul, ~0ul, 1, 1349184610Salfred RF_ACTIVE); 1350184824Sthompsa if (com->irqres) { 1351184610Salfred ret = BUS_SETUP_INTR(device_get_parent(dev), dev, com->irqres, 1352184610Salfred INTR_TYPE_TTY | INTR_FAST, 1353184610Salfred siointr, com, &com->cookie); 1354184610Salfred if (ret) { 1355184610Salfred ret = BUS_SETUP_INTR(device_get_parent(dev), dev, 1356184610Salfred com->irqres, INTR_TYPE_TTY, 1357186730Salfred siointr, com, &com->cookie); 1358184610Salfred if (ret == 0) 1359184610Salfred device_printf(dev, "unable to activate interrupt in fast mode - using normal mode"); 1360184610Salfred } 1361184610Salfred if (ret) 1362184610Salfred device_printf(dev, "could not activate interrupt\n"); 1363184610Salfred } 1364184610Salfred 1365184610Salfred return (0); 1366184610Salfred} 1367184610Salfred 1368184610Salfredstatic int 1369184610Salfredsioopen(dev, flag, mode, p) 1370184610Salfred dev_t dev; 1371184610Salfred int flag; 1372184610Salfred int mode; 1373184610Salfred struct proc *p; 1374184610Salfred{ 1375184610Salfred struct com_s *com; 1376184610Salfred int error; 1377184610Salfred int mynor; 1378184610Salfred int s; 1379184610Salfred struct tty *tp; 1380184610Salfred int unit; 1381184610Salfred 1382184610Salfred mynor = minor(dev); 1383184610Salfred unit = MINOR_TO_UNIT(mynor); 1384184610Salfred com = com_addr(unit); 1385184610Salfred if (com == NULL) 1386184610Salfred return (ENXIO); 1387184610Salfred if (com->gone) 1388184610Salfred return (ENXIO); 1389184610Salfred if (mynor & CONTROL_MASK) 1390184610Salfred return (0); 1391184610Salfred tp = dev->si_tty = com->tp = ttymalloc(com->tp); 1392184610Salfred s = spltty(); 1393184610Salfred /* 1394184610Salfred * We jump to this label after all non-interrupted sleeps to pick 1395184610Salfred * up any changes of the device state. 1396184610Salfred */ 1397184610Salfredopen_top: 1398184610Salfred while (com->state & CS_DTR_OFF) { 1399184610Salfred error = tsleep(&com->dtr_wait, TTIPRI | PCATCH, "siodtr", 0); 1400184610Salfred if (com_addr(unit) == NULL) 1401184610Salfred return (ENXIO); 1402184610Salfred if (error != 0 || com->gone) 1403184610Salfred goto out; 1404184610Salfred } 1405184610Salfred if (tp->t_state & TS_ISOPEN) { 1406184610Salfred /* 1407184610Salfred * The device is open, so everything has been initialized. 1408184610Salfred * Handle conflicts. 1409184610Salfred */ 1410184610Salfred if (mynor & CALLOUT_MASK) { 1411184610Salfred if (!com->active_out) { 1412184610Salfred error = EBUSY; 1413184610Salfred goto out; 1414184610Salfred } 1415184610Salfred } else { 1416184610Salfred if (com->active_out) { 1417184610Salfred if (flag & O_NONBLOCK) { 1418184610Salfred error = EBUSY; 1419184610Salfred goto out; 1420184610Salfred } 1421184610Salfred error = tsleep(&com->active_out, 1422184610Salfred TTIPRI | PCATCH, "siobi", 0); 1423184610Salfred if (com_addr(unit) == NULL) 1424184610Salfred return (ENXIO); 1425184610Salfred if (error != 0 || com->gone) 1426184610Salfred goto out; 1427184610Salfred goto open_top; 1428184610Salfred } 1429184610Salfred } 1430184610Salfred if (tp->t_state & TS_XCLUDE && 1431184610Salfred suser(p)) { 1432184610Salfred error = EBUSY; 1433184610Salfred goto out; 1434184610Salfred } 1435184610Salfred } else { 1436184610Salfred int intrsave; 1437184610Salfred 1438184610Salfred /* 1439184610Salfred * The device isn't open, so there are no conflicts. 1440184610Salfred * Initialize it. Initialization is done twice in many 1441184610Salfred * cases: to preempt sleeping callin opens if we are 1442184610Salfred * callout, and to complete a callin open after DCD rises. 1443184610Salfred */ 1444184610Salfred tp->t_oproc = comstart; 1445184610Salfred tp->t_param = comparam; 1446184610Salfred tp->t_stop = comstop; 1447184610Salfred tp->t_dev = dev; 1448184610Salfred tp->t_termios = mynor & CALLOUT_MASK 1449184610Salfred ? com->it_out : com->it_in; 1450184610Salfred (void)commctl(com, TIOCM_DTR | TIOCM_RTS, DMSET); 1451184610Salfred com->poll = com->no_irq; 1452184610Salfred com->poll_output = com->loses_outints; 1453184610Salfred ++com->wopeners; 1454184610Salfred error = comparam(tp, &tp->t_termios); 1455184610Salfred --com->wopeners; 1456184610Salfred if (error != 0) 1457184824Sthompsa goto out; 1458184610Salfred /* 1459184610Salfred * XXX we should goto open_top if comparam() slept. 1460184610Salfred */ 1461184610Salfred if (com->hasfifo) { 1462184610Salfred /* 1463184610Salfred * (Re)enable and drain fifos. 1464184610Salfred * 1465184610Salfred * Certain SMC chips cause problems if the fifos 1466184610Salfred * are enabled while input is ready. Turn off the 1467184610Salfred * fifo if necessary to clear the input. We test 1468184610Salfred * the input ready bit after enabling the fifos 1469184610Salfred * since we've already enabled them in comparam() 1470184610Salfred * and to handle races between enabling and fresh 1471184824Sthompsa * input. 1472184610Salfred */ 1473184610Salfred while (TRUE) { 1474184610Salfred sio_setreg(com, com_fifo, 1475184610Salfred FIFO_RCV_RST | FIFO_XMT_RST 1476184610Salfred | com->fifo_image); 1477184610Salfred /* 1478184610Salfred * XXX the delays are for superstitious 1479184610Salfred * historical reasons. It must be less than 1480184610Salfred * the character time at the maximum 1481184610Salfred * supported speed (87 usec at 115200 bps 1482184610Salfred * 8N1). Otherwise we might loop endlessly 1483184610Salfred * if data is streaming in. We used to use 1484184610Salfred * delays of 100. That usually worked 1485184610Salfred * because DELAY(100) used to usually delay 1486184824Sthompsa * for about 85 usec instead of 100. 1487184610Salfred */ 1488184610Salfred DELAY(50); 1489184610Salfred if (!(inb(com->line_status_port) & LSR_RXRDY)) 1490184610Salfred break; 1491184610Salfred sio_setreg(com, com_fifo, 0); 1492184610Salfred DELAY(50); 1493184610Salfred (void) inb(com->data_port); 1494184610Salfred } 1495184610Salfred } 1496184610Salfred 1497184610Salfred intrsave = save_intr(); 1498184610Salfred disable_intr(); 1499184610Salfred COM_LOCK(); 1500184610Salfred (void) inb(com->line_status_port); 1501184610Salfred (void) inb(com->data_port); 1502192984Sthompsa com->prev_modem_status = com->last_modem_status 1503184610Salfred = inb(com->modem_status_port); 1504184610Salfred if (COM_IIR_TXRDYBUG(com->flags)) { 1505184610Salfred outb(com->intr_ctl_port, IER_ERXRDY | IER_ERLS 1506184824Sthompsa | IER_EMSC); 1507184610Salfred } else { 1508184824Sthompsa outb(com->intr_ctl_port, IER_ERXRDY | IER_ETXRDY 1509184610Salfred | IER_ERLS | IER_EMSC); 1510184610Salfred } 1511184610Salfred COM_UNLOCK(); 1512184610Salfred restore_intr(intrsave); 1513184610Salfred /* 1514184610Salfred * Handle initial DCD. Callout devices get a fake initial 1515192984Sthompsa * DCD (trapdoor DCD). If we are callout, then any sleeping 1516184610Salfred * callin opens get woken up and resume sleeping on "siobi" 1517184610Salfred * instead of "siodcd". 1518184610Salfred */ 1519184610Salfred /* 1520184610Salfred * XXX `mynor & CALLOUT_MASK' should be 1521192984Sthompsa * `tp->t_cflag & (SOFT_CARRIER | TRAPDOOR_CARRIER) where 1522184610Salfred * TRAPDOOR_CARRIER is the default initial state for callout 1523184610Salfred * devices and SOFT_CARRIER is like CLOCAL except it hides 1524184610Salfred * the true carrier. 1525184610Salfred */ 1526184610Salfred if (com->prev_modem_status & MSR_DCD || mynor & CALLOUT_MASK) 1527192984Sthompsa (*linesw[tp->t_line].l_modem)(tp, 1); 1528184610Salfred } 1529184610Salfred /* 1530184610Salfred * Wait for DCD if necessary. 1531184610Salfred */ 1532184610Salfred if (!(tp->t_state & TS_CARR_ON) && !(mynor & CALLOUT_MASK) 1533192984Sthompsa && !(tp->t_cflag & CLOCAL) && !(flag & O_NONBLOCK)) { 1534184610Salfred ++com->wopeners; 1535184610Salfred error = tsleep(TSA_CARR_ON(tp), TTIPRI | PCATCH, "siodcd", 0); 1536184610Salfred if (com_addr(unit) == NULL) 1537184610Salfred return (ENXIO); 1538184610Salfred --com->wopeners; 1539184610Salfred if (error != 0 || com->gone) 1540192984Sthompsa goto out; 1541184610Salfred goto open_top; 1542184610Salfred } 1543184610Salfred error = (*linesw[tp->t_line].l_open)(dev, tp); 1544184610Salfred disc_optim(tp, &tp->t_termios, com); 1545184610Salfred if (tp->t_state & TS_ISOPEN && mynor & CALLOUT_MASK) 1546184610Salfred com->active_out = TRUE; 1547184610Salfred siosettimeout(); 1548184610Salfredout: 1549184610Salfred splx(s); 1550184610Salfred if (!(tp->t_state & TS_ISOPEN) && com->wopeners == 0) 1551184610Salfred comhardclose(com); 1552192984Sthompsa return (error); 1553184610Salfred} 1554184610Salfred 1555184610Salfredstatic int 1556184610Salfredsioclose(dev, flag, mode, p) 1557184610Salfred dev_t dev; 1558192984Sthompsa int flag; 1559184610Salfred int mode; 1560184610Salfred struct proc *p; 1561184610Salfred{ 1562184610Salfred struct com_s *com; 1563184610Salfred int mynor; 1564192984Sthompsa int s; 1565184610Salfred struct tty *tp; 1566184610Salfred 1567184610Salfred mynor = minor(dev); 1568184610Salfred if (mynor & CONTROL_MASK) 1569184610Salfred return (0); 1570192984Sthompsa com = com_addr(MINOR_TO_UNIT(mynor)); 1571184610Salfred if (com == NULL) 1572184610Salfred return (ENODEV); 1573184610Salfred tp = com->tp; 1574184610Salfred s = spltty(); 1575184610Salfred (*linesw[tp->t_line].l_close)(tp, flag); 1576184610Salfred disc_optim(tp, &tp->t_termios, com); 1577192984Sthompsa comstop(tp, FREAD | FWRITE); 1578184610Salfred comhardclose(com); 1579184610Salfred ttyclose(tp); 1580184610Salfred siosettimeout(); 1581184610Salfred splx(s); 1582184610Salfred if (com->gone) { 1583184610Salfred printf("sio%d: gone\n", com->unit); 1584184610Salfred s = spltty(); 1585184610Salfred if (com->ibuf != NULL) 1586184610Salfred free(com->ibuf, M_DEVBUF); 1587184610Salfred bzero(tp, sizeof *tp); 1588184610Salfred splx(s); 1589192984Sthompsa } 1590184610Salfred return (0); 1591184610Salfred} 1592184610Salfred 1593184610Salfredstatic void 1594184610Salfredcomhardclose(com) 1595192984Sthompsa struct com_s *com; 1596184610Salfred{ 1597184610Salfred int s; 1598184610Salfred struct tty *tp; 1599184610Salfred int unit; 1600184610Salfred 1601192984Sthompsa unit = com->unit; 1602184610Salfred s = spltty(); 1603184610Salfred com->poll = FALSE; 1604184610Salfred com->poll_output = FALSE; 1605184610Salfred com->do_timestamp = FALSE; 1606184610Salfred com->do_dcd_timestamp = FALSE; 1607192984Sthompsa com->pps.ppsparam.mode = 0; 1608184610Salfred sio_setreg(com, com_cfcr, com->cfcr_image &= ~CFCR_SBREAK); 1609184610Salfred { 1610184610Salfred sio_setreg(com, com_ier, 0); 1611184610Salfred tp = com->tp; 1612184610Salfred if (tp->t_cflag & HUPCL 1613184610Salfred /* 1614192984Sthompsa * XXX we will miss any carrier drop between here and the 1615184610Salfred * next open. Perhaps we should watch DCD even when the 1616184610Salfred * port is closed; it is not sufficient to check it at 1617184610Salfred * the next open because it might go up and down while 1618184610Salfred * we're not watching. 1619184610Salfred */ 1620184610Salfred || (!com->active_out 1621184610Salfred && !(com->prev_modem_status & MSR_DCD) 1622184610Salfred && !(com->it_in.c_cflag & CLOCAL)) 1623184610Salfred || !(tp->t_state & TS_ISOPEN)) { 1624184610Salfred (void)commctl(com, TIOCM_DTR, DMBIC); 1625184610Salfred if (com->dtr_wait != 0 && !(com->state & CS_DTR_OFF)) { 1626192984Sthompsa timeout(siodtrwakeup, com, com->dtr_wait); 1627184610Salfred com->state |= CS_DTR_OFF; 1628184610Salfred } 1629184610Salfred } 1630184610Salfred } 1631184610Salfred if (com->hasfifo) { 1632192984Sthompsa /* 1633184610Salfred * Disable fifos so that they are off after controlled 1634184610Salfred * reboots. Some BIOSes fail to detect 16550s when the 1635184610Salfred * fifos are enabled. 1636184610Salfred */ 1637184610Salfred sio_setreg(com, com_fifo, 0); 1638192984Sthompsa } 1639184610Salfred com->active_out = FALSE; 1640187173Sthompsa wakeup(&com->active_out); 1641184610Salfred wakeup(TSA_CARR_ON(tp)); /* restart any wopeners */ 1642184610Salfred splx(s); 1643184610Salfred} 1644184610Salfred 1645184610Salfredstatic int 1646184610Salfredsioread(dev, uio, flag) 1647184610Salfred dev_t dev; 1648184610Salfred struct uio *uio; 1649184610Salfred int flag; 1650184610Salfred{ 1651184610Salfred int mynor; 1652184610Salfred struct com_s *com; 1653184610Salfred 1654184610Salfred mynor = minor(dev); 1655184610Salfred if (mynor & CONTROL_MASK) 1656184610Salfred return (ENODEV); 1657184610Salfred com = com_addr(MINOR_TO_UNIT(mynor)); 1658184610Salfred if (com == NULL || com->gone) 1659184610Salfred return (ENODEV); 1660184610Salfred return ((*linesw[com->tp->t_line].l_read)(com->tp, uio, flag)); 1661184610Salfred} 1662184610Salfred 1663184610Salfredstatic int 1664184610Salfredsiowrite(dev, uio, flag) 1665184610Salfred dev_t dev; 1666184610Salfred struct uio *uio; 1667184610Salfred int flag; 1668184610Salfred{ 1669184610Salfred int mynor; 1670184610Salfred struct com_s *com; 1671184610Salfred int unit; 1672184610Salfred 1673184610Salfred mynor = minor(dev); 1674184610Salfred if (mynor & CONTROL_MASK) 1675184610Salfred return (ENODEV); 1676184610Salfred 1677184610Salfred unit = MINOR_TO_UNIT(mynor); 1678184610Salfred com = com_addr(unit); 1679184610Salfred if (com == NULL || com->gone) 1680184610Salfred return (ENODEV); 1681184610Salfred /* 1682184610Salfred * (XXX) We disallow virtual consoles if the physical console is 1683184610Salfred * a serial port. This is in case there is a display attached that 1684184610Salfred * is not the console. In that situation we don't need/want the X 1685184610Salfred * server taking over the console. 1686184610Salfred */ 1687184610Salfred if (constty != NULL && unit == comconsole) 1688184610Salfred constty = NULL; 1689184610Salfred return ((*linesw[com->tp->t_line].l_write)(com->tp, uio, flag)); 1690192984Sthompsa} 1691184610Salfred 1692184610Salfredstatic void 1693184610Salfredsiobusycheck(chan) 1694184610Salfred void *chan; 1695184610Salfred{ 1696192984Sthompsa struct com_s *com; 1697184610Salfred int s; 1698184610Salfred 1699184610Salfred com = (struct com_s *)chan; 1700184610Salfred 1701184610Salfred /* 1702184610Salfred * Clear TS_BUSY if low-level output is complete. 1703184610Salfred * spl locking is sufficient because siointr1() does not set CS_BUSY. 1704184610Salfred * If siointr1() clears CS_BUSY after we look at it, then we'll get 1705184610Salfred * called again. Reading the line status port outside of siointr1() 1706184610Salfred * is safe because CS_BUSY is clear so there are no output interrupts 1707190735Sthompsa * to lose. 1708184610Salfred */ 1709184610Salfred s = spltty(); 1710192984Sthompsa if (com->state & CS_BUSY) 1711192984Sthompsa com->extra_state &= ~CSE_BUSYCHECK; /* False alarm. */ 1712184610Salfred else if ((inb(com->line_status_port) & (LSR_TSRE | LSR_TXRDY)) 1713184610Salfred == (LSR_TSRE | LSR_TXRDY)) { 1714184610Salfred com->tp->t_state &= ~TS_BUSY; 1715184610Salfred ttwwakeup(com->tp); 1716184610Salfred com->extra_state &= ~CSE_BUSYCHECK; 1717184610Salfred } else 1718184610Salfred timeout(siobusycheck, com, hz / 100); 1719184610Salfred splx(s); 1720184610Salfred} 1721184610Salfred 1722184610Salfredstatic void 1723184610Salfredsiodtrwakeup(chan) 1724192984Sthompsa void *chan; 1725192984Sthompsa{ 1726184610Salfred struct com_s *com; 1727184610Salfred 1728184610Salfred com = (struct com_s *)chan; 1729184610Salfred com->state &= ~CS_DTR_OFF; 1730184610Salfred wakeup(&com->dtr_wait); 1731184610Salfred} 1732184610Salfred 1733184610Salfred/* 1734184610Salfred * Call this function with COM_LOCK. It will return with the lock still held. 1735184610Salfred */ 1736184610Salfredstatic void 1737192984Sthompsasioinput(com) 1738184610Salfred struct com_s *com; 1739184610Salfred{ 1740184610Salfred u_char *buf; 1741184610Salfred int incc; 1742184610Salfred u_char line_status; 1743184610Salfred int recv_data; 1744184610Salfred struct tty *tp; 1745184610Salfred int intrsave; 1746184610Salfred 1747192984Sthompsa buf = com->ibuf; 1748184610Salfred tp = com->tp; 1749184610Salfred if (!(tp->t_state & TS_ISOPEN) || !(tp->t_cflag & CREAD)) { 1750184610Salfred com_events -= (com->iptr - com->ibuf); 1751184610Salfred com->iptr = com->ibuf; 1752184610Salfred return; 1753184610Salfred } 1754184610Salfred if (tp->t_state & TS_CAN_BYPASS_L_RINT) { 1755184610Salfred /* 1756192984Sthompsa * Avoid the grotesquely inefficient lineswitch routine 1757184610Salfred * (ttyinput) in "raw" mode. It usually takes about 450 1758184610Salfred * instructions (that's without canonical processing or echo!). 1759184610Salfred * slinput is reasonably fast (usually 40 instructions plus 1760184610Salfred * call overhead). 1761184610Salfred */ 1762184610Salfred do { 1763184610Salfred /* 1764184610Salfred * This may look odd, but it is using save-and-enable 1765192984Sthompsa * semantics instead of the save-and-disable semantics 1766184610Salfred * that are used everywhere else. 1767184610Salfred */ 1768184610Salfred intrsave = save_intr(); 1769184610Salfred COM_UNLOCK(); 1770184610Salfred enable_intr(); 1771184610Salfred incc = com->iptr - buf; 1772187183Sthompsa if (tp->t_rawq.c_cc + incc > tp->t_ihiwat 1773184610Salfred && (com->state & CS_RTS_IFLOW 1774184610Salfred || tp->t_iflag & IXOFF) 1775184610Salfred && !(tp->t_state & TS_TBLOCK)) 1776184610Salfred ttyblock(tp); 1777184610Salfred com->delta_error_counts[CE_TTY_BUF_OVERFLOW] 1778184610Salfred += b_to_q((char *)buf, incc, &tp->t_rawq); 1779184610Salfred buf += incc; 1780184610Salfred tk_nin += incc; 1781184610Salfred tk_rawcc += incc; 1782184610Salfred tp->t_rawcc += incc; 1783184610Salfred ttwakeup(tp); 1784184610Salfred if (tp->t_state & TS_TTSTOP 1785184610Salfred && (tp->t_iflag & IXANY 1786184610Salfred || tp->t_cc[VSTART] == tp->t_cc[VSTOP])) { 1787184610Salfred tp->t_state &= ~TS_TTSTOP; 1788184610Salfred tp->t_lflag &= ~FLUSHO; 1789184610Salfred comstart(tp); 1790184610Salfred } 1791184610Salfred restore_intr(intrsave); 1792184610Salfred COM_LOCK(); 1793191402Sthompsa } while (buf < com->iptr); 1794192984Sthompsa } else { 1795192984Sthompsa do { 1796184610Salfred /* 1797191402Sthompsa * This may look odd, but it is using save-and-enable 1798191402Sthompsa * semantics instead of the save-and-disable semantics 1799191402Sthompsa * that are used everywhere else. 1800184610Salfred */ 1801184610Salfred intrsave = save_intr(); 1802191402Sthompsa COM_UNLOCK(); 1803184610Salfred enable_intr(); 1804184824Sthompsa line_status = buf[com->ierroff]; 1805184610Salfred recv_data = *buf++; 1806184610Salfred if (line_status 1807191402Sthompsa & (LSR_BI | LSR_FE | LSR_OE | LSR_PE)) { 1808191402Sthompsa if (line_status & LSR_BI) 1809191402Sthompsa recv_data |= TTY_BI; 1810184610Salfred if (line_status & LSR_FE) 1811191402Sthompsa recv_data |= TTY_FE; 1812191402Sthompsa if (line_status & LSR_OE) 1813184610Salfred recv_data |= TTY_OE; 1814184610Salfred if (line_status & LSR_PE) 1815184610Salfred recv_data |= TTY_PE; 1816191402Sthompsa } 1817184610Salfred (*linesw[tp->t_line].l_rint)(recv_data, tp); 1818191402Sthompsa restore_intr(intrsave); 1819184610Salfred COM_LOCK(); 1820184610Salfred } while (buf < com->iptr); 1821184610Salfred } 1822184610Salfred com_events -= (com->iptr - com->ibuf); 1823184610Salfred com->iptr = com->ibuf; 1824184610Salfred 1825184610Salfred /* 1826184610Salfred * There is now room for another low-level buffer full of input, 1827184610Salfred * so enable RTS if it is now disabled and there is room in the 1828184610Salfred * high-level buffer. 1829184610Salfred */ 1830184610Salfred if ((com->state & CS_RTS_IFLOW) && !(com->mcr_image & MCR_RTS) && 1831191402Sthompsa !(tp->t_state & TS_TBLOCK)) 1832184610Salfred outb(com->modem_ctl_port, com->mcr_image |= MCR_RTS); 1833184610Salfred} 1834184610Salfred 1835184610Salfredvoid 1836184610Salfredsiointr(arg) 1837184610Salfred void *arg; 1838184610Salfred{ 1839184610Salfred#ifndef COM_MULTIPORT 1840184610Salfred COM_LOCK(); 1841184610Salfred siointr1((struct com_s *) arg); 1842184610Salfred COM_UNLOCK(); 1843184610Salfred#else /* COM_MULTIPORT */ 1844184610Salfred bool_t possibly_more_intrs; 1845184610Salfred int unit; 1846184610Salfred struct com_s *com; 1847191402Sthompsa 1848184610Salfred /* 1849191402Sthompsa * Loop until there is no activity on any port. This is necessary 1850184610Salfred * to get an interrupt edge more than to avoid another interrupt. 1851184610Salfred * If the IRQ signal is just an OR of the IRQ signals from several 1852184610Salfred * devices, then the edge from one may be lost because another is 1853184610Salfred * on. 1854184610Salfred */ 1855184610Salfred COM_LOCK(); 1856184610Salfred do { 1857184610Salfred possibly_more_intrs = FALSE; 1858184610Salfred for (unit = 0; unit < sio_numunits; ++unit) { 1859191402Sthompsa com = com_addr(unit); 1860184610Salfred /* 1861184610Salfred * XXX COM_LOCK(); 1862184610Salfred * would it work here, or be counter-productive? 1863184610Salfred */ 1864184610Salfred if (com != NULL 1865184610Salfred && !com->gone 1866184610Salfred && (inb(com->int_id_port) & IIR_IMASK) 1867184610Salfred != IIR_NOPEND) { 1868184610Salfred siointr1(com); 1869184610Salfred possibly_more_intrs = TRUE; 1870184610Salfred } 1871184610Salfred /* XXX COM_UNLOCK(); */ 1872184610Salfred } 1873184610Salfred } while (possibly_more_intrs); 1874184610Salfred COM_UNLOCK(); 1875184610Salfred#endif /* COM_MULTIPORT */ 1876191402Sthompsa} 1877184610Salfred 1878184610Salfredstatic void 1879184610Salfredsiointr1(com) 1880184610Salfred struct com_s *com; 1881184610Salfred{ 1882184610Salfred u_char line_status; 1883184610Salfred u_char modem_status; 1884184610Salfred u_char *ioptr; 1885191402Sthompsa u_char recv_data; 1886184610Salfred u_char int_ctl; 1887184610Salfred u_char int_ctl_new; 1888184610Salfred struct timecounter *tc; 1889184610Salfred u_int count; 1890184610Salfred 1891184610Salfred int_ctl = inb(com->intr_ctl_port); 1892184610Salfred int_ctl_new = int_ctl; 1893184610Salfred 1894184610Salfred while (!com->gone) { 1895184610Salfred if (com->pps.ppsparam.mode & PPS_CAPTUREBOTH) { 1896184610Salfred modem_status = inb(com->modem_status_port); 1897191402Sthompsa if ((modem_status ^ com->last_modem_status) & MSR_DCD) { 1898184610Salfred tc = timecounter; 1899184610Salfred count = tc->tc_get_timecount(tc); 1900184610Salfred pps_event(&com->pps, tc, count, 1901184610Salfred (modem_status & MSR_DCD) ? 1902184610Salfred PPS_CAPTUREASSERT : PPS_CAPTURECLEAR); 1903184610Salfred } 1904184610Salfred } 1905184610Salfred line_status = inb(com->line_status_port); 1906184610Salfred 1907184610Salfred /* input event? (check first to help avoid overruns) */ 1908184610Salfred while (line_status & LSR_RCV_MASK) { 1909184610Salfred /* break/unnattached error bits or real input? */ 1910184610Salfred if (!(line_status & LSR_RXRDY)) 1911184610Salfred recv_data = 0; 1912184610Salfred else 1913184610Salfred recv_data = inb(com->data_port); 1914184610Salfred#if defined(DDB) && defined(ALT_BREAK_TO_DEBUGGER) 1915184610Salfred /* 1916184610Salfred * Solaris implements a new BREAK which is initiated 1917184610Salfred * by a character sequence CR ~ ^b which is similar 1918191402Sthompsa * to a familiar pattern used on Sun servers by the 1919184610Salfred * Remote Console. 1920184610Salfred */ 1921184610Salfred#define KEY_CRTLB 2 /* ^B */ 1922184610Salfred#define KEY_CR 13 /* CR '\r' */ 1923184610Salfred#define KEY_TILDE 126 /* ~ */ 1924184610Salfred 1925184610Salfred if (com->unit == comconsole) { 1926184610Salfred static int brk_state1 = 0, brk_state2 = 0; 1927184610Salfred if (recv_data == KEY_CR) { 1928184610Salfred brk_state1 = recv_data; 1929184610Salfred brk_state2 = 0; 1930191402Sthompsa } else if (brk_state1 == KEY_CR 1931184610Salfred && (recv_data == KEY_TILDE 1932184610Salfred || recv_data == KEY_CRTLB)) { 1933184610Salfred if (recv_data == KEY_TILDE) 1934184610Salfred brk_state2 = recv_data; 1935184610Salfred else if (brk_state2 == KEY_TILDE 1936184610Salfred && recv_data == KEY_CRTLB) { 1937184610Salfred breakpoint(); 1938184610Salfred brk_state1 = 0; 1939184610Salfred brk_state2 = 0; 1940184610Salfred goto cont; 1941184610Salfred } else 1942184610Salfred brk_state2 = 0; 1943184610Salfred } else 1944184610Salfred brk_state1 = 0; 1945184610Salfred } 1946191402Sthompsa#endif 1947184610Salfred if (line_status & (LSR_BI | LSR_FE | LSR_PE)) { 1948184610Salfred /* 1949184610Salfred * Don't store BI if IGNBRK or FE/PE if IGNPAR. 1950184610Salfred * Otherwise, push the work to a higher level 1951184610Salfred * (to handle PARMRK) if we're bypassing. 1952184610Salfred * Otherwise, convert BI/FE and PE+INPCK to 0. 1953184610Salfred * 1954184610Salfred * This makes bypassing work right in the 1955184610Salfred * usual "raw" case (IGNBRK set, and IGNPAR 1956184610Salfred * and INPCK clear). 1957191402Sthompsa * 1958184610Salfred * Note: BI together with FE/PE means just BI. 1959184610Salfred */ 1960184610Salfred if (line_status & LSR_BI) { 1961184610Salfred#if defined(DDB) && defined(BREAK_TO_DEBUGGER) 1962184610Salfred if (com->unit == comconsole) { 1963184610Salfred breakpoint(); 1964184610Salfred goto cont; 1965184610Salfred } 1966184610Salfred#endif 1967184610Salfred if (com->tp == NULL 1968184610Salfred || com->tp->t_iflag & IGNBRK) 1969184610Salfred goto cont; 1970184610Salfred } else { 1971184610Salfred if (com->tp == NULL 1972184610Salfred || com->tp->t_iflag & IGNPAR) 1973184610Salfred goto cont; 1974184610Salfred } 1975184610Salfred if (com->tp->t_state & TS_CAN_BYPASS_L_RINT 1976184610Salfred && (line_status & (LSR_BI | LSR_FE) 1977184610Salfred || com->tp->t_iflag & INPCK)) 1978191402Sthompsa recv_data = 0; 1979191402Sthompsa } 1980184610Salfred ++com->bytes_in; 1981184610Salfred if (com->hotchar != 0 && recv_data == com->hotchar) 1982184610Salfred setsofttty(); 1983184610Salfred ioptr = com->iptr; 1984184610Salfred if (ioptr >= com->ibufend) 1985191402Sthompsa CE_RECORD(com, CE_INTERRUPT_BUF_OVERFLOW); 1986191402Sthompsa else { 1987184610Salfred if (com->do_timestamp) 1988184610Salfred microtime(&com->timestamp); 1989184610Salfred ++com_events; 1990184610Salfred schedsofttty(); 1991191402Sthompsa#if 0 /* for testing input latency vs efficiency */ 1992191402Sthompsaif (com->iptr - com->ibuf == 8) 1993184610Salfred setsofttty(); 1994184610Salfred#endif 1995184610Salfred ioptr[0] = recv_data; 1996191402Sthompsa ioptr[com->ierroff] = line_status; 1997191402Sthompsa com->iptr = ++ioptr; 1998184610Salfred if (ioptr == com->ihighwater 1999184610Salfred && com->state & CS_RTS_IFLOW) 2000184610Salfred outb(com->modem_ctl_port, 2001191402Sthompsa com->mcr_image &= ~MCR_RTS); 2002191402Sthompsa if (line_status & LSR_OE) 2003184610Salfred CE_RECORD(com, CE_OVERRUN); 2004184610Salfred } 2005184610Salfredcont: 2006184610Salfred /* 2007184610Salfred * "& 0x7F" is to avoid the gcc-1.40 generating a slow 2008184610Salfred * jump from the top of the loop to here 2009184610Salfred */ 2010184610Salfred line_status = inb(com->line_status_port) & 0x7F; 2011184610Salfred } 2012184610Salfred 2013184610Salfred /* modem status change? (always check before doing output) */ 2014191402Sthompsa modem_status = inb(com->modem_status_port); 2015184610Salfred if (modem_status != com->last_modem_status) { 2016184610Salfred if (com->do_dcd_timestamp 2017184610Salfred && !(com->last_modem_status & MSR_DCD) 2018184610Salfred && modem_status & MSR_DCD) 2019191402Sthompsa microtime(&com->dcd_timestamp); 2020184610Salfred 2021184610Salfred /* 2022184610Salfred * Schedule high level to handle DCD changes. Note 2023184610Salfred * that we don't use the delta bits anywhere. Some 2024184610Salfred * UARTs mess them up, and it's easy to remember the 2025184610Salfred * previous bits and calculate the delta. 2026184610Salfred */ 2027184610Salfred com->last_modem_status = modem_status; 2028184610Salfred if (!(com->state & CS_CHECKMSR)) { 2029184610Salfred com_events += LOTS_OF_EVENTS; 2030184610Salfred com->state |= CS_CHECKMSR; 2031184610Salfred setsofttty(); 2032184610Salfred } 2033184610Salfred 2034184610Salfred /* handle CTS change immediately for crisp flow ctl */ 2035184610Salfred if (com->state & CS_CTS_OFLOW) { 2036184610Salfred if (modem_status & MSR_CTS) 2037184610Salfred com->state |= CS_ODEVREADY; 2038191402Sthompsa else 2039184610Salfred com->state &= ~CS_ODEVREADY; 2040184610Salfred } 2041184610Salfred } 2042184610Salfred 2043184610Salfred /* output queued and everything ready? */ 2044184610Salfred if (line_status & LSR_TXRDY 2045184610Salfred && com->state >= (CS_BUSY | CS_TTGO | CS_ODEVREADY)) { 2046191402Sthompsa ioptr = com->obufq.l_head; 2047184610Salfred if (com->tx_fifo_size > 1) { 2048184610Salfred u_int ocount; 2049184610Salfred 2050184610Salfred ocount = com->obufq.l_tail - ioptr; 2051184610Salfred if (ocount > com->tx_fifo_size) 2052184610Salfred ocount = com->tx_fifo_size; 2053184610Salfred com->bytes_out += ocount; 2054184610Salfred do 2055184610Salfred outb(com->data_port, *ioptr++); 2056184610Salfred while (--ocount != 0); 2057184610Salfred } else { 2058184610Salfred outb(com->data_port, *ioptr++); 2059184610Salfred ++com->bytes_out; 2060184610Salfred } 2061184610Salfred com->obufq.l_head = ioptr; 2062184610Salfred if (COM_IIR_TXRDYBUG(com->flags)) { 2063184610Salfred int_ctl_new = int_ctl | IER_ETXRDY; 2064184610Salfred } 2065184610Salfred if (ioptr >= com->obufq.l_tail) { 2066184610Salfred struct lbq *qp; 2067184610Salfred 2068184610Salfred qp = com->obufq.l_next; 2069184610Salfred qp->l_queued = FALSE; 2070184610Salfred qp = qp->l_next; 2071184610Salfred if (qp != NULL) { 2072184610Salfred com->obufq.l_head = qp->l_head; 2073184610Salfred com->obufq.l_tail = qp->l_tail; 2074184610Salfred com->obufq.l_next = qp; 2075184610Salfred } else { 2076184610Salfred /* output just completed */ 2077184610Salfred if (COM_IIR_TXRDYBUG(com->flags)) { 2078184610Salfred int_ctl_new = int_ctl & ~IER_ETXRDY; 2079184610Salfred } 2080184610Salfred com->state &= ~CS_BUSY; 2081184610Salfred } 2082184610Salfred if (!(com->state & CS_ODONE)) { 2083184610Salfred com_events += LOTS_OF_EVENTS; 2084184610Salfred com->state |= CS_ODONE; 2085184610Salfred setsofttty(); /* handle at high level ASAP */ 2086184610Salfred } 2087184610Salfred } 2088184610Salfred if (COM_IIR_TXRDYBUG(com->flags) && (int_ctl != int_ctl_new)) { 2089184610Salfred outb(com->intr_ctl_port, int_ctl_new); 2090191402Sthompsa } 2091184610Salfred } 2092184610Salfred 2093184610Salfred /* finished? */ 2094184610Salfred#ifndef COM_MULTIPORT 2095184610Salfred if ((inb(com->int_id_port) & IIR_IMASK) == IIR_NOPEND) 2096184610Salfred#endif /* COM_MULTIPORT */ 2097184610Salfred return; 2098184610Salfred } 2099184610Salfred} 2100184610Salfred 2101184610Salfredstatic int 2102184610Salfredsioioctl(dev, cmd, data, flag, p) 2103184610Salfred dev_t dev; 2104184610Salfred u_long cmd; 2105184610Salfred caddr_t data; 2106184610Salfred int flag; 2107184610Salfred struct proc *p; 2108184610Salfred{ 2109184610Salfred struct com_s *com; 2110184610Salfred int error; 2111184610Salfred int mynor; 2112184610Salfred int s; 2113184610Salfred struct tty *tp; 2114184610Salfred#if defined(COMPAT_43) || defined(COMPAT_SUNOS) 2115191402Sthompsa u_long oldcmd; 2116184610Salfred struct termios term; 2117184610Salfred#endif 2118184610Salfred 2119184610Salfred mynor = minor(dev); 2120184610Salfred com = com_addr(MINOR_TO_UNIT(mynor)); 2121184610Salfred if (com == NULL || com->gone) 2122184610Salfred return (ENODEV); 2123184610Salfred if (mynor & CONTROL_MASK) { 2124184610Salfred struct termios *ct; 2125184610Salfred 2126184610Salfred switch (mynor & CONTROL_MASK) { 2127184610Salfred case CONTROL_INIT_STATE: 2128184610Salfred ct = mynor & CALLOUT_MASK ? &com->it_out : &com->it_in; 2129184610Salfred break; 2130184610Salfred case CONTROL_LOCK_STATE: 2131184610Salfred ct = mynor & CALLOUT_MASK ? &com->lt_out : &com->lt_in; 2132184610Salfred break; 2133184610Salfred default: 2134184610Salfred return (ENODEV); /* /dev/nodev */ 2135184610Salfred } 2136184610Salfred switch (cmd) { 2137184610Salfred case TIOCSETA: 2138184610Salfred error = suser(p); 2139184610Salfred if (error != 0) 2140184610Salfred return (error); 2141184610Salfred *ct = *(struct termios *)data; 2142184610Salfred return (0); 2143184610Salfred case TIOCGETA: 2144184610Salfred *(struct termios *)data = *ct; 2145184610Salfred return (0); 2146184610Salfred case TIOCGETD: 2147184610Salfred *(int *)data = TTYDISC; 2148184610Salfred return (0); 2149184610Salfred case TIOCGWINSZ: 2150184610Salfred bzero(data, sizeof(struct winsize)); 2151184610Salfred return (0); 2152184610Salfred default: 2153184610Salfred return (ENOTTY); 2154184610Salfred } 2155184610Salfred } 2156184610Salfred tp = com->tp; 2157184610Salfred#if defined(COMPAT_43) || defined(COMPAT_SUNOS) 2158184610Salfred term = tp->t_termios; 2159184610Salfred oldcmd = cmd; 2160184610Salfred error = ttsetcompat(tp, &cmd, data, &term); 2161191402Sthompsa if (error != 0) 2162184610Salfred return (error); 2163184610Salfred if (cmd != oldcmd) 2164184610Salfred data = (caddr_t)&term; 2165184610Salfred#endif 2166184610Salfred if (cmd == TIOCSETA || cmd == TIOCSETAW || cmd == TIOCSETAF) { 2167184610Salfred int cc; 2168191402Sthompsa struct termios *dt = (struct termios *)data; 2169191402Sthompsa struct termios *lt = mynor & CALLOUT_MASK 2170184610Salfred ? &com->lt_out : &com->lt_in; 2171184610Salfred 2172184610Salfred dt->c_iflag = (tp->t_iflag & lt->c_iflag) 2173191402Sthompsa | (dt->c_iflag & ~lt->c_iflag); 2174184610Salfred dt->c_oflag = (tp->t_oflag & lt->c_oflag) 2175184610Salfred | (dt->c_oflag & ~lt->c_oflag); 2176191402Sthompsa dt->c_cflag = (tp->t_cflag & lt->c_cflag) 2177191402Sthompsa | (dt->c_cflag & ~lt->c_cflag); 2178191402Sthompsa dt->c_lflag = (tp->t_lflag & lt->c_lflag) 2179184610Salfred | (dt->c_lflag & ~lt->c_lflag); 2180184610Salfred for (cc = 0; cc < NCCS; ++cc) 2181184610Salfred if (lt->c_cc[cc] != 0) 2182192984Sthompsa dt->c_cc[cc] = tp->t_cc[cc]; 2183184610Salfred if (lt->c_ispeed != 0) 2184192984Sthompsa dt->c_ispeed = tp->t_ispeed; 2185184610Salfred if (lt->c_ospeed != 0) 2186192984Sthompsa dt->c_ospeed = tp->t_ospeed; 2187184610Salfred } 2188184610Salfred error = (*linesw[tp->t_line].l_ioctl)(tp, cmd, data, flag, p); 2189184610Salfred if (error != ENOIOCTL) 2190184610Salfred return (error); 2191184610Salfred s = spltty(); 2192184610Salfred error = ttioctl(tp, cmd, data, flag); 2193184610Salfred disc_optim(tp, &tp->t_termios, com); 2194184610Salfred if (error != ENOIOCTL) { 2195184610Salfred splx(s); 2196184610Salfred return (error); 2197184610Salfred } 2198184610Salfred switch (cmd) { 2199184610Salfred case TIOCSBRK: 2200184610Salfred sio_setreg(com, com_cfcr, com->cfcr_image |= CFCR_SBREAK); 2201184610Salfred break; 2202184610Salfred case TIOCCBRK: 2203184610Salfred sio_setreg(com, com_cfcr, com->cfcr_image &= ~CFCR_SBREAK); 2204184610Salfred break; 2205184610Salfred case TIOCSDTR: 2206184610Salfred (void)commctl(com, TIOCM_DTR, DMBIS); 2207184610Salfred break; 2208184610Salfred case TIOCCDTR: 2209184610Salfred (void)commctl(com, TIOCM_DTR, DMBIC); 2210184610Salfred break; 2211184610Salfred /* 2212184610Salfred * XXX should disallow changing MCR_RTS if CS_RTS_IFLOW is set. The 2213184610Salfred * changes get undone on the next call to comparam(). 2214184610Salfred */ 2215184610Salfred case TIOCMSET: 2216184610Salfred (void)commctl(com, *(int *)data, DMSET); 2217184610Salfred break; 2218184610Salfred case TIOCMBIS: 2219184610Salfred (void)commctl(com, *(int *)data, DMBIS); 2220184610Salfred break; 2221184610Salfred case TIOCMBIC: 2222184610Salfred (void)commctl(com, *(int *)data, DMBIC); 2223184610Salfred break; 2224184610Salfred case TIOCMGET: 2225184610Salfred *(int *)data = commctl(com, 0, DMGET); 2226184610Salfred break; 2227184610Salfred case TIOCMSDTRWAIT: 2228184610Salfred /* must be root since the wait applies to following logins */ 2229184610Salfred error = suser(p); 2230184610Salfred if (error != 0) { 2231184610Salfred splx(s); 2232184610Salfred return (error); 2233184610Salfred } 2234184610Salfred com->dtr_wait = *(int *)data * hz / 100; 2235184610Salfred break; 2236184610Salfred case TIOCMGDTRWAIT: 2237184610Salfred *(int *)data = com->dtr_wait * 100 / hz; 2238184610Salfred break; 2239184610Salfred case TIOCTIMESTAMP: 2240184610Salfred com->do_timestamp = TRUE; 2241184610Salfred *(struct timeval *)data = com->timestamp; 2242184610Salfred break; 2243184610Salfred case TIOCDCDTIMESTAMP: 2244184610Salfred com->do_dcd_timestamp = TRUE; 2245184610Salfred *(struct timeval *)data = com->dcd_timestamp; 2246184610Salfred break; 2247184610Salfred default: 2248184610Salfred splx(s); 2249184610Salfred error = pps_ioctl(cmd, data, &com->pps); 2250184610Salfred if (error == ENODEV) 2251184610Salfred error = ENOTTY; 2252184610Salfred return (error); 2253184610Salfred } 2254184610Salfred splx(s); 2255184610Salfred return (0); 2256184610Salfred} 2257184610Salfred 2258184610Salfred/* software interrupt handler for SWI_TTY */ 2259184610Salfredstatic void 2260184610Salfredsiopoll() 2261184610Salfred{ 2262184610Salfred int unit; 2263184610Salfred int intrsave; 2264184610Salfred 2265184610Salfred if (com_events == 0) 2266184610Salfred return; 2267184610Salfredrepeat: 2268184610Salfred for (unit = 0; unit < sio_numunits; ++unit) { 2269184610Salfred struct com_s *com; 2270184610Salfred int incc; 2271184610Salfred struct tty *tp; 2272184610Salfred 2273184610Salfred com = com_addr(unit); 2274184610Salfred if (com == NULL) 2275184610Salfred continue; 2276184610Salfred tp = com->tp; 2277184610Salfred if (tp == NULL || com->gone) { 2278184610Salfred /* 2279184610Salfred * Discard any events related to never-opened or 2280184610Salfred * going-away devices. 2281184610Salfred */ 2282184610Salfred intrsave = save_intr(); 2283184610Salfred disable_intr(); 2284184610Salfred COM_LOCK(); 2285184610Salfred incc = com->iptr - com->ibuf; 2286184610Salfred com->iptr = com->ibuf; 2287184610Salfred if (com->state & CS_CHECKMSR) { 2288184610Salfred incc += LOTS_OF_EVENTS; 2289184610Salfred com->state &= ~CS_CHECKMSR; 2290192984Sthompsa } 2291184610Salfred com_events -= incc; 2292184610Salfred COM_UNLOCK(); 2293184610Salfred restore_intr(intrsave); 2294184610Salfred continue; 2295184610Salfred } 2296192984Sthompsa if (com->iptr != com->ibuf) { 2297192984Sthompsa intrsave = save_intr(); 2298184610Salfred disable_intr(); 2299184610Salfred COM_LOCK(); 2300184610Salfred sioinput(com); 2301184610Salfred COM_UNLOCK(); 2302184610Salfred restore_intr(intrsave); 2303192499Sthompsa } 2304184610Salfred if (com->state & CS_CHECKMSR) { 2305184610Salfred u_char delta_modem_status; 2306190735Sthompsa 2307184610Salfred intrsave = save_intr(); 2308192499Sthompsa disable_intr(); 2309184610Salfred COM_LOCK(); 2310184610Salfred delta_modem_status = com->last_modem_status 2311184610Salfred ^ com->prev_modem_status; 2312184610Salfred com->prev_modem_status = com->last_modem_status; 2313184610Salfred com_events -= LOTS_OF_EVENTS; 2314184610Salfred com->state &= ~CS_CHECKMSR; 2315184610Salfred COM_UNLOCK(); 2316184610Salfred restore_intr(intrsave); 2317184610Salfred if (delta_modem_status & MSR_DCD) 2318184610Salfred (*linesw[tp->t_line].l_modem) 2319184610Salfred (tp, com->prev_modem_status & MSR_DCD); 2320184610Salfred } 2321184610Salfred if (com->state & CS_ODONE) { 2322184610Salfred intrsave = save_intr(); 2323184610Salfred disable_intr(); 2324184610Salfred COM_LOCK(); 2325184610Salfred com_events -= LOTS_OF_EVENTS; 2326184610Salfred com->state &= ~CS_ODONE; 2327184610Salfred COM_UNLOCK(); 2328184610Salfred restore_intr(intrsave); 2329184610Salfred if (!(com->state & CS_BUSY) 2330184610Salfred && !(com->extra_state & CSE_BUSYCHECK)) { 2331184610Salfred timeout(siobusycheck, com, hz / 100); 2332184610Salfred com->extra_state |= CSE_BUSYCHECK; 2333184610Salfred } 2334184610Salfred (*linesw[tp->t_line].l_start)(tp); 2335184610Salfred } 2336192984Sthompsa if (com_events == 0) 2337184610Salfred break; 2338184610Salfred } 2339184610Salfred if (com_events >= LOTS_OF_EVENTS) 2340184610Salfred goto repeat; 2341184610Salfred} 2342184610Salfred 2343184610Salfredstatic int 2344190735Sthompsacomparam(tp, t) 2345184610Salfred struct tty *tp; 2346 struct termios *t; 2347{ 2348 u_int cfcr; 2349 int cflag; 2350 struct com_s *com; 2351 int divisor; 2352 u_char dlbh; 2353 u_char dlbl; 2354 int s; 2355 int unit; 2356 int intrsave; 2357 2358 /* do historical conversions */ 2359 if (t->c_ispeed == 0) 2360 t->c_ispeed = t->c_ospeed; 2361 2362 /* check requested parameters */ 2363 divisor = ttspeedtab(t->c_ospeed, comspeedtab); 2364 if (divisor < 0 || (divisor > 0 && t->c_ispeed != t->c_ospeed)) 2365 return (EINVAL); 2366 2367 /* parameters are OK, convert them to the com struct and the device */ 2368 unit = DEV_TO_UNIT(tp->t_dev); 2369 com = com_addr(unit); 2370 if (com == NULL) 2371 return (ENODEV); 2372 s = spltty(); 2373 if (divisor == 0) 2374 (void)commctl(com, TIOCM_DTR, DMBIC); /* hang up line */ 2375 else 2376 (void)commctl(com, TIOCM_DTR, DMBIS); 2377 cflag = t->c_cflag; 2378 switch (cflag & CSIZE) { 2379 case CS5: 2380 cfcr = CFCR_5BITS; 2381 break; 2382 case CS6: 2383 cfcr = CFCR_6BITS; 2384 break; 2385 case CS7: 2386 cfcr = CFCR_7BITS; 2387 break; 2388 default: 2389 cfcr = CFCR_8BITS; 2390 break; 2391 } 2392 if (cflag & PARENB) { 2393 cfcr |= CFCR_PENAB; 2394 if (!(cflag & PARODD)) 2395 cfcr |= CFCR_PEVEN; 2396 } 2397 if (cflag & CSTOPB) 2398 cfcr |= CFCR_STOPB; 2399 2400 if (com->hasfifo && divisor != 0) { 2401 /* 2402 * Use a fifo trigger level low enough so that the input 2403 * latency from the fifo is less than about 16 msec and 2404 * the total latency is less than about 30 msec. These 2405 * latencies are reasonable for humans. Serial comms 2406 * protocols shouldn't expect anything better since modem 2407 * latencies are larger. 2408 */ 2409 com->fifo_image = t->c_ospeed <= 4800 2410 ? FIFO_ENABLE : FIFO_ENABLE | FIFO_RX_HIGH; 2411#ifdef COM_ESP 2412 /* 2413 * The Hayes ESP card needs the fifo DMA mode bit set 2414 * in compatibility mode. If not, it will interrupt 2415 * for each character received. 2416 */ 2417 if (com->esp) 2418 com->fifo_image |= FIFO_DMA_MODE; 2419#endif 2420 sio_setreg(com, com_fifo, com->fifo_image); 2421 } 2422 2423 /* 2424 * This returns with interrupts disabled so that we can complete 2425 * the speed change atomically. Keeping interrupts disabled is 2426 * especially important while com_data is hidden. 2427 */ 2428 intrsave = save_intr(); 2429 (void) siosetwater(com, t->c_ispeed); 2430 2431 if (divisor != 0) { 2432 sio_setreg(com, com_cfcr, cfcr | CFCR_DLAB); 2433 /* 2434 * Only set the divisor registers if they would change, 2435 * since on some 16550 incompatibles (UMC8669F), setting 2436 * them while input is arriving them loses sync until 2437 * data stops arriving. 2438 */ 2439 dlbl = divisor & 0xFF; 2440 if (sio_getreg(com, com_dlbl) != dlbl) 2441 sio_setreg(com, com_dlbl, dlbl); 2442 dlbh = (u_int) divisor >> 8; 2443 if (sio_getreg(com, com_dlbh) != dlbh) 2444 sio_setreg(com, com_dlbh, dlbh); 2445 } 2446 2447 sio_setreg(com, com_cfcr, com->cfcr_image = cfcr); 2448 2449 if (!(tp->t_state & TS_TTSTOP)) 2450 com->state |= CS_TTGO; 2451 2452 if (cflag & CRTS_IFLOW) { 2453 if (com->st16650a) { 2454 sio_setreg(com, com_cfcr, 0xbf); 2455 sio_setreg(com, com_fifo, 2456 sio_getreg(com, com_fifo) | 0x40); 2457 } 2458 com->state |= CS_RTS_IFLOW; 2459 /* 2460 * If CS_RTS_IFLOW just changed from off to on, the change 2461 * needs to be propagated to MCR_RTS. This isn't urgent, 2462 * so do it later by calling comstart() instead of repeating 2463 * a lot of code from comstart() here. 2464 */ 2465 } else if (com->state & CS_RTS_IFLOW) { 2466 com->state &= ~CS_RTS_IFLOW; 2467 /* 2468 * CS_RTS_IFLOW just changed from on to off. Force MCR_RTS 2469 * on here, since comstart() won't do it later. 2470 */ 2471 outb(com->modem_ctl_port, com->mcr_image |= MCR_RTS); 2472 if (com->st16650a) { 2473 sio_setreg(com, com_cfcr, 0xbf); 2474 sio_setreg(com, com_fifo, 2475 sio_getreg(com, com_fifo) & ~0x40); 2476 } 2477 } 2478 2479 2480 /* 2481 * Set up state to handle output flow control. 2482 * XXX - worth handling MDMBUF (DCD) flow control at the lowest level? 2483 * Now has 10+ msec latency, while CTS flow has 50- usec latency. 2484 */ 2485 com->state |= CS_ODEVREADY; 2486 com->state &= ~CS_CTS_OFLOW; 2487 if (cflag & CCTS_OFLOW) { 2488 com->state |= CS_CTS_OFLOW; 2489 if (!(com->last_modem_status & MSR_CTS)) 2490 com->state &= ~CS_ODEVREADY; 2491 if (com->st16650a) { 2492 sio_setreg(com, com_cfcr, 0xbf); 2493 sio_setreg(com, com_fifo, 2494 sio_getreg(com, com_fifo) | 0x80); 2495 } 2496 } else { 2497 if (com->st16650a) { 2498 sio_setreg(com, com_cfcr, 0xbf); 2499 sio_setreg(com, com_fifo, 2500 sio_getreg(com, com_fifo) & ~0x80); 2501 } 2502 } 2503 2504 sio_setreg(com, com_cfcr, com->cfcr_image); 2505 2506 /* XXX shouldn't call functions while intrs are disabled. */ 2507 disc_optim(tp, t, com); 2508 /* 2509 * Recover from fiddling with CS_TTGO. We used to call siointr1() 2510 * unconditionally, but that defeated the careful discarding of 2511 * stale input in sioopen(). 2512 */ 2513 if (com->state >= (CS_BUSY | CS_TTGO)) 2514 siointr1(com); 2515 2516 COM_UNLOCK(); 2517 restore_intr(intrsave); 2518 splx(s); 2519 comstart(tp); 2520 if (com->ibufold != NULL) { 2521 free(com->ibufold, M_DEVBUF); 2522 com->ibufold = NULL; 2523 } 2524 return (0); 2525} 2526 2527/* 2528 * This function must be called with interrupts enabled and the com_lock 2529 * unlocked. It will return with interrupts disabled and the com_lock locked. 2530 */ 2531static int 2532siosetwater(com, speed) 2533 struct com_s *com; 2534 speed_t speed; 2535{ 2536 int cp4ticks; 2537 u_char *ibuf; 2538 int ibufsize; 2539 struct tty *tp; 2540 2541 /* 2542 * Make the buffer size large enough to handle a softtty interrupt 2543 * latency of about 2 ticks without loss of throughput or data 2544 * (about 3 ticks if input flow control is not used or not honoured, 2545 * but a bit less for CS5-CS7 modes). 2546 */ 2547 cp4ticks = speed / 10 / hz * 4; 2548 for (ibufsize = 128; ibufsize < cp4ticks;) 2549 ibufsize <<= 1; 2550 if (ibufsize == com->ibufsize) { 2551 disable_intr(); 2552 COM_LOCK(); 2553 return (0); 2554 } 2555 2556 /* 2557 * Allocate input buffer. The extra factor of 2 in the size is 2558 * to allow for an error byte for each input byte. 2559 */ 2560 ibuf = malloc(2 * ibufsize, M_DEVBUF, M_NOWAIT); 2561 if (ibuf == NULL) { 2562 disable_intr(); 2563 COM_LOCK(); 2564 return (ENOMEM); 2565 } 2566 2567 /* Initialize non-critical variables. */ 2568 com->ibufold = com->ibuf; 2569 com->ibufsize = ibufsize; 2570 tp = com->tp; 2571 if (tp != NULL) { 2572 tp->t_ififosize = 2 * ibufsize; 2573 tp->t_ispeedwat = (speed_t)-1; 2574 tp->t_ospeedwat = (speed_t)-1; 2575 } 2576 2577 /* 2578 * Read current input buffer, if any. Continue with interrupts 2579 * disabled. 2580 */ 2581 disable_intr(); 2582 COM_LOCK(); 2583 if (com->iptr != com->ibuf) 2584 sioinput(com); 2585 2586 /*- 2587 * Initialize critical variables, including input buffer watermarks. 2588 * The external device is asked to stop sending when the buffer 2589 * exactly reaches high water, or when the high level requests it. 2590 * The high level is notified immediately (rather than at a later 2591 * clock tick) when this watermark is reached. 2592 * The buffer size is chosen so the watermark should almost never 2593 * be reached. 2594 * The low watermark is invisibly 0 since the buffer is always 2595 * emptied all at once. 2596 */ 2597 com->iptr = com->ibuf = ibuf; 2598 com->ibufend = ibuf + ibufsize; 2599 com->ierroff = ibufsize; 2600 com->ihighwater = ibuf + 3 * ibufsize / 4; 2601 return (0); 2602} 2603 2604static void 2605comstart(tp) 2606 struct tty *tp; 2607{ 2608 struct com_s *com; 2609 int s; 2610 int unit; 2611 int intrsave; 2612 2613 unit = DEV_TO_UNIT(tp->t_dev); 2614 com = com_addr(unit); 2615 if (com == NULL) 2616 return; 2617 s = spltty(); 2618 intrsave = save_intr(); 2619 disable_intr(); 2620 COM_LOCK(); 2621 if (tp->t_state & TS_TTSTOP) 2622 com->state &= ~CS_TTGO; 2623 else 2624 com->state |= CS_TTGO; 2625 if (tp->t_state & TS_TBLOCK) { 2626 if (com->mcr_image & MCR_RTS && com->state & CS_RTS_IFLOW) 2627 outb(com->modem_ctl_port, com->mcr_image &= ~MCR_RTS); 2628 } else { 2629 if (!(com->mcr_image & MCR_RTS) && com->iptr < com->ihighwater 2630 && com->state & CS_RTS_IFLOW) 2631 outb(com->modem_ctl_port, com->mcr_image |= MCR_RTS); 2632 } 2633 COM_UNLOCK(); 2634 restore_intr(intrsave); 2635 if (tp->t_state & (TS_TIMEOUT | TS_TTSTOP)) { 2636 ttwwakeup(tp); 2637 splx(s); 2638 return; 2639 } 2640 if (tp->t_outq.c_cc != 0) { 2641 struct lbq *qp; 2642 struct lbq *next; 2643 2644 if (!com->obufs[0].l_queued) { 2645 com->obufs[0].l_tail 2646 = com->obuf1 + q_to_b(&tp->t_outq, com->obuf1, 2647 sizeof com->obuf1); 2648 com->obufs[0].l_next = NULL; 2649 com->obufs[0].l_queued = TRUE; 2650 intrsave = save_intr(); 2651 disable_intr(); 2652 COM_LOCK(); 2653 if (com->state & CS_BUSY) { 2654 qp = com->obufq.l_next; 2655 while ((next = qp->l_next) != NULL) 2656 qp = next; 2657 qp->l_next = &com->obufs[0]; 2658 } else { 2659 com->obufq.l_head = com->obufs[0].l_head; 2660 com->obufq.l_tail = com->obufs[0].l_tail; 2661 com->obufq.l_next = &com->obufs[0]; 2662 com->state |= CS_BUSY; 2663 } 2664 COM_UNLOCK(); 2665 restore_intr(intrsave); 2666 } 2667 if (tp->t_outq.c_cc != 0 && !com->obufs[1].l_queued) { 2668 com->obufs[1].l_tail 2669 = com->obuf2 + q_to_b(&tp->t_outq, com->obuf2, 2670 sizeof com->obuf2); 2671 com->obufs[1].l_next = NULL; 2672 com->obufs[1].l_queued = TRUE; 2673 intrsave = save_intr(); 2674 disable_intr(); 2675 COM_LOCK(); 2676 if (com->state & CS_BUSY) { 2677 qp = com->obufq.l_next; 2678 while ((next = qp->l_next) != NULL) 2679 qp = next; 2680 qp->l_next = &com->obufs[1]; 2681 } else { 2682 com->obufq.l_head = com->obufs[1].l_head; 2683 com->obufq.l_tail = com->obufs[1].l_tail; 2684 com->obufq.l_next = &com->obufs[1]; 2685 com->state |= CS_BUSY; 2686 } 2687 COM_UNLOCK(); 2688 restore_intr(intrsave); 2689 } 2690 tp->t_state |= TS_BUSY; 2691 } 2692 intrsave = save_intr(); 2693 disable_intr(); 2694 COM_LOCK(); 2695 if (com->state >= (CS_BUSY | CS_TTGO)) 2696 siointr1(com); /* fake interrupt to start output */ 2697 COM_UNLOCK(); 2698 restore_intr(intrsave); 2699 ttwwakeup(tp); 2700 splx(s); 2701} 2702 2703static void 2704comstop(tp, rw) 2705 struct tty *tp; 2706 int rw; 2707{ 2708 struct com_s *com; 2709 int intrsave; 2710 2711 com = com_addr(DEV_TO_UNIT(tp->t_dev)); 2712 if (com == NULL || com->gone) 2713 return; 2714 intrsave = save_intr(); 2715 disable_intr(); 2716 COM_LOCK(); 2717 if (rw & FWRITE) { 2718 if (com->hasfifo) 2719#ifdef COM_ESP 2720 /* XXX avoid h/w bug. */ 2721 if (!com->esp) 2722#endif 2723 sio_setreg(com, com_fifo, 2724 FIFO_XMT_RST | com->fifo_image); 2725 com->obufs[0].l_queued = FALSE; 2726 com->obufs[1].l_queued = FALSE; 2727 if (com->state & CS_ODONE) 2728 com_events -= LOTS_OF_EVENTS; 2729 com->state &= ~(CS_ODONE | CS_BUSY); 2730 com->tp->t_state &= ~TS_BUSY; 2731 } 2732 if (rw & FREAD) { 2733 if (com->hasfifo) 2734#ifdef COM_ESP 2735 /* XXX avoid h/w bug. */ 2736 if (!com->esp) 2737#endif 2738 sio_setreg(com, com_fifo, 2739 FIFO_RCV_RST | com->fifo_image); 2740 com_events -= (com->iptr - com->ibuf); 2741 com->iptr = com->ibuf; 2742 } 2743 COM_UNLOCK(); 2744 restore_intr(intrsave); 2745 comstart(tp); 2746} 2747 2748static int 2749commctl(com, bits, how) 2750 struct com_s *com; 2751 int bits; 2752 int how; 2753{ 2754 int mcr; 2755 int msr; 2756 int intrsave; 2757 2758 if (how == DMGET) { 2759 bits = TIOCM_LE; /* XXX - always enabled while open */ 2760 mcr = com->mcr_image; 2761 if (mcr & MCR_DTR) 2762 bits |= TIOCM_DTR; 2763 if (mcr & MCR_RTS) 2764 bits |= TIOCM_RTS; 2765 msr = com->prev_modem_status; 2766 if (msr & MSR_CTS) 2767 bits |= TIOCM_CTS; 2768 if (msr & MSR_DCD) 2769 bits |= TIOCM_CD; 2770 if (msr & MSR_DSR) 2771 bits |= TIOCM_DSR; 2772 /* 2773 * XXX - MSR_RI is naturally volatile, and we make MSR_TERI 2774 * more volatile by reading the modem status a lot. Perhaps 2775 * we should latch both bits until the status is read here. 2776 */ 2777 if (msr & (MSR_RI | MSR_TERI)) 2778 bits |= TIOCM_RI; 2779 return (bits); 2780 } 2781 mcr = 0; 2782 if (bits & TIOCM_DTR) 2783 mcr |= MCR_DTR; 2784 if (bits & TIOCM_RTS) 2785 mcr |= MCR_RTS; 2786 if (com->gone) 2787 return(0); 2788 intrsave = save_intr(); 2789 disable_intr(); 2790 COM_LOCK(); 2791 switch (how) { 2792 case DMSET: 2793 outb(com->modem_ctl_port, 2794 com->mcr_image = mcr | (com->mcr_image & MCR_IENABLE)); 2795 break; 2796 case DMBIS: 2797 outb(com->modem_ctl_port, com->mcr_image |= mcr); 2798 break; 2799 case DMBIC: 2800 outb(com->modem_ctl_port, com->mcr_image &= ~mcr); 2801 break; 2802 } 2803 COM_UNLOCK(); 2804 restore_intr(intrsave); 2805 return (0); 2806} 2807 2808static void 2809siosettimeout() 2810{ 2811 struct com_s *com; 2812 bool_t someopen; 2813 int unit; 2814 2815 /* 2816 * Set our timeout period to 1 second if no polled devices are open. 2817 * Otherwise set it to max(1/200, 1/hz). 2818 * Enable timeouts iff some device is open. 2819 */ 2820 untimeout(comwakeup, (void *)NULL, sio_timeout_handle); 2821 sio_timeout = hz; 2822 someopen = FALSE; 2823 for (unit = 0; unit < sio_numunits; ++unit) { 2824 com = com_addr(unit); 2825 if (com != NULL && com->tp != NULL 2826 && com->tp->t_state & TS_ISOPEN && !com->gone) { 2827 someopen = TRUE; 2828 if (com->poll || com->poll_output) { 2829 sio_timeout = hz > 200 ? hz / 200 : 1; 2830 break; 2831 } 2832 } 2833 } 2834 if (someopen) { 2835 sio_timeouts_until_log = hz / sio_timeout; 2836 sio_timeout_handle = timeout(comwakeup, (void *)NULL, 2837 sio_timeout); 2838 } else { 2839 /* Flush error messages, if any. */ 2840 sio_timeouts_until_log = 1; 2841 comwakeup((void *)NULL); 2842 untimeout(comwakeup, (void *)NULL, sio_timeout_handle); 2843 } 2844} 2845 2846static void 2847comwakeup(chan) 2848 void *chan; 2849{ 2850 struct com_s *com; 2851 int unit; 2852 int intrsave; 2853 2854 sio_timeout_handle = timeout(comwakeup, (void *)NULL, sio_timeout); 2855 2856 /* 2857 * Recover from lost output interrupts. 2858 * Poll any lines that don't use interrupts. 2859 */ 2860 for (unit = 0; unit < sio_numunits; ++unit) { 2861 com = com_addr(unit); 2862 if (com != NULL && !com->gone 2863 && (com->state >= (CS_BUSY | CS_TTGO) || com->poll)) { 2864 intrsave = save_intr(); 2865 disable_intr(); 2866 COM_LOCK(); 2867 siointr1(com); 2868 COM_UNLOCK(); 2869 restore_intr(intrsave); 2870 } 2871 } 2872 2873 /* 2874 * Check for and log errors, but not too often. 2875 */ 2876 if (--sio_timeouts_until_log > 0) 2877 return; 2878 sio_timeouts_until_log = hz / sio_timeout; 2879 for (unit = 0; unit < sio_numunits; ++unit) { 2880 int errnum; 2881 2882 com = com_addr(unit); 2883 if (com == NULL) 2884 continue; 2885 if (com->gone) 2886 continue; 2887 for (errnum = 0; errnum < CE_NTYPES; ++errnum) { 2888 u_int delta; 2889 u_long total; 2890 2891 intrsave = save_intr(); 2892 disable_intr(); 2893 COM_LOCK(); 2894 delta = com->delta_error_counts[errnum]; 2895 com->delta_error_counts[errnum] = 0; 2896 COM_UNLOCK(); 2897 restore_intr(intrsave); 2898 if (delta == 0) 2899 continue; 2900 total = com->error_counts[errnum] += delta; 2901 log(LOG_ERR, "sio%d: %u more %s%s (total %lu)\n", 2902 unit, delta, error_desc[errnum], 2903 delta == 1 ? "" : "s", total); 2904 } 2905 } 2906} 2907 2908static void 2909disc_optim(tp, t, com) 2910 struct tty *tp; 2911 struct termios *t; 2912 struct com_s *com; 2913{ 2914 if (!(t->c_iflag & (ICRNL | IGNCR | IMAXBEL | INLCR | ISTRIP | IXON)) 2915 && (!(t->c_iflag & BRKINT) || (t->c_iflag & IGNBRK)) 2916 && (!(t->c_iflag & PARMRK) 2917 || (t->c_iflag & (IGNPAR | IGNBRK)) == (IGNPAR | IGNBRK)) 2918 && !(t->c_lflag & (ECHO | ICANON | IEXTEN | ISIG | PENDIN)) 2919 && linesw[tp->t_line].l_rint == ttyinput) 2920 tp->t_state |= TS_CAN_BYPASS_L_RINT; 2921 else 2922 tp->t_state &= ~TS_CAN_BYPASS_L_RINT; 2923 com->hotchar = linesw[tp->t_line].l_hotchar; 2924} 2925 2926/* 2927 * Following are all routines needed for SIO to act as console 2928 */ 2929#include <sys/cons.h> 2930 2931struct siocnstate { 2932 u_char dlbl; 2933 u_char dlbh; 2934 u_char ier; 2935 u_char cfcr; 2936 u_char mcr; 2937}; 2938 2939#ifndef __alpha__ 2940static speed_t siocngetspeed __P((Port_t, struct speedtab *)); 2941#endif 2942static void siocnclose __P((struct siocnstate *sp, Port_t iobase)); 2943static void siocnopen __P((struct siocnstate *sp, Port_t iobase, int speed)); 2944static void siocntxwait __P((Port_t iobase)); 2945 2946#ifdef __alpha__ 2947int siocnattach __P((int port, int speed)); 2948int siogdbattach __P((int port, int speed)); 2949int siogdbgetc __P((void)); 2950void siogdbputc __P((int c)); 2951#else 2952static cn_probe_t siocnprobe; 2953static cn_init_t siocninit; 2954#endif 2955static cn_checkc_t siocncheckc; 2956static cn_getc_t siocngetc; 2957static cn_putc_t siocnputc; 2958 2959#ifdef __i386__ 2960CONS_DRIVER(sio, siocnprobe, siocninit, NULL, siocngetc, siocncheckc, 2961 siocnputc, NULL); 2962#endif 2963 2964/* To get the GDB related variables */ 2965#if DDB > 0 2966#include <ddb/ddb.h> 2967#endif 2968 2969static void 2970siocntxwait(iobase) 2971 Port_t iobase; 2972{ 2973 int timo; 2974 2975 /* 2976 * Wait for any pending transmission to finish. Required to avoid 2977 * the UART lockup bug when the speed is changed, and for normal 2978 * transmits. 2979 */ 2980 timo = 100000; 2981 while ((inb(iobase + com_lsr) & (LSR_TSRE | LSR_TXRDY)) 2982 != (LSR_TSRE | LSR_TXRDY) && --timo != 0) 2983 ; 2984} 2985 2986#ifndef __alpha__ 2987 2988/* 2989 * Read the serial port specified and try to figure out what speed 2990 * it's currently running at. We're assuming the serial port has 2991 * been initialized and is basicly idle. This routine is only intended 2992 * to be run at system startup. 2993 * 2994 * If the value read from the serial port doesn't make sense, return 0. 2995 */ 2996 2997static speed_t 2998siocngetspeed(iobase, table) 2999 Port_t iobase; 3000 struct speedtab *table; 3001{ 3002 int code; 3003 u_char dlbh; 3004 u_char dlbl; 3005 u_char cfcr; 3006 3007 cfcr = inb(iobase + com_cfcr); 3008 outb(iobase + com_cfcr, CFCR_DLAB | cfcr); 3009 3010 dlbl = inb(iobase + com_dlbl); 3011 dlbh = inb(iobase + com_dlbh); 3012 3013 outb(iobase + com_cfcr, cfcr); 3014 3015 code = dlbh << 8 | dlbl; 3016 3017 for (; table->sp_speed != -1; table++) 3018 if (table->sp_code == code) 3019 return (table->sp_speed); 3020 3021 return (0); /* didn't match anything sane */ 3022} 3023 3024#endif 3025 3026static void 3027siocnopen(sp, iobase, speed) 3028 struct siocnstate *sp; 3029 Port_t iobase; 3030 int speed; 3031{ 3032 int divisor; 3033 u_char dlbh; 3034 u_char dlbl; 3035 3036 /* 3037 * Save all the device control registers except the fifo register 3038 * and set our default ones (cs8 -parenb speed=comdefaultrate). 3039 * We can't save the fifo register since it is read-only. 3040 */ 3041 sp->ier = inb(iobase + com_ier); 3042 outb(iobase + com_ier, 0); /* spltty() doesn't stop siointr() */ 3043 siocntxwait(iobase); 3044 sp->cfcr = inb(iobase + com_cfcr); 3045 outb(iobase + com_cfcr, CFCR_DLAB | CFCR_8BITS); 3046 sp->dlbl = inb(iobase + com_dlbl); 3047 sp->dlbh = inb(iobase + com_dlbh); 3048 /* 3049 * Only set the divisor registers if they would change, since on 3050 * some 16550 incompatibles (Startech), setting them clears the 3051 * data input register. This also reduces the effects of the 3052 * UMC8669F bug. 3053 */ 3054 divisor = ttspeedtab(speed, comspeedtab); 3055 dlbl = divisor & 0xFF; 3056 if (sp->dlbl != dlbl) 3057 outb(iobase + com_dlbl, dlbl); 3058 dlbh = (u_int) divisor >> 8; 3059 if (sp->dlbh != dlbh) 3060 outb(iobase + com_dlbh, dlbh); 3061 outb(iobase + com_cfcr, CFCR_8BITS); 3062 sp->mcr = inb(iobase + com_mcr); 3063 /* 3064 * We don't want interrupts, but must be careful not to "disable" 3065 * them by clearing the MCR_IENABLE bit, since that might cause 3066 * an interrupt by floating the IRQ line. 3067 */ 3068 outb(iobase + com_mcr, (sp->mcr & MCR_IENABLE) | MCR_DTR | MCR_RTS); 3069} 3070 3071static void 3072siocnclose(sp, iobase) 3073 struct siocnstate *sp; 3074 Port_t iobase; 3075{ 3076 /* 3077 * Restore the device control registers. 3078 */ 3079 siocntxwait(iobase); 3080 outb(iobase + com_cfcr, CFCR_DLAB | CFCR_8BITS); 3081 if (sp->dlbl != inb(iobase + com_dlbl)) 3082 outb(iobase + com_dlbl, sp->dlbl); 3083 if (sp->dlbh != inb(iobase + com_dlbh)) 3084 outb(iobase + com_dlbh, sp->dlbh); 3085 outb(iobase + com_cfcr, sp->cfcr); 3086 /* 3087 * XXX damp oscillations of MCR_DTR and MCR_RTS by not restoring them. 3088 */ 3089 outb(iobase + com_mcr, sp->mcr | MCR_DTR | MCR_RTS); 3090 outb(iobase + com_ier, sp->ier); 3091} 3092 3093#ifndef __alpha__ 3094 3095static void 3096siocnprobe(cp) 3097 struct consdev *cp; 3098{ 3099 speed_t boot_speed; 3100 u_char cfcr; 3101 int s, unit; 3102 struct siocnstate sp; 3103 3104 /* 3105 * Find our first enabled console, if any. If it is a high-level 3106 * console device, then initialize it and return successfully. 3107 * If it is a low-level console device, then initialize it and 3108 * return unsuccessfully. It must be initialized in both cases 3109 * for early use by console drivers and debuggers. Initializing 3110 * the hardware is not necessary in all cases, since the i/o 3111 * routines initialize it on the fly, but it is necessary if 3112 * input might arrive while the hardware is switched back to an 3113 * uninitialized state. We can't handle multiple console devices 3114 * yet because our low-level routines don't take a device arg. 3115 * We trust the user to set the console flags properly so that we 3116 * don't need to probe. 3117 */ 3118 cp->cn_pri = CN_DEAD; 3119 3120 for (unit = 0; unit < 16; unit++) { /* XXX need to know how many */ 3121 int flags; 3122 int disabled; 3123 if (resource_int_value("sio", unit, "disabled", &disabled) == 0) { 3124 if (disabled) 3125 continue; 3126 } 3127 if (resource_int_value("sio", unit, "flags", &flags)) 3128 continue; 3129 if (COM_CONSOLE(flags) || COM_DEBUGGER(flags)) { 3130 int port; 3131 Port_t iobase; 3132 3133 if (resource_int_value("sio", unit, "port", &port)) 3134 continue; 3135 iobase = port; 3136 s = spltty(); 3137 if (boothowto & RB_SERIAL) { 3138 boot_speed = siocngetspeed(iobase, comspeedtab); 3139 if (boot_speed) 3140 comdefaultrate = boot_speed; 3141 } 3142 3143 /* 3144 * Initialize the divisor latch. We can't rely on 3145 * siocnopen() to do this the first time, since it 3146 * avoids writing to the latch if the latch appears 3147 * to have the correct value. Also, if we didn't 3148 * just read the speed from the hardware, then we 3149 * need to set the speed in hardware so that 3150 * switching it later is null. 3151 */ 3152 cfcr = inb(iobase + com_cfcr); 3153 outb(iobase + com_cfcr, CFCR_DLAB | cfcr); 3154 outb(iobase + com_dlbl, 3155 COMBRD(comdefaultrate) & 0xff); 3156 outb(iobase + com_dlbh, 3157 (u_int) COMBRD(comdefaultrate) >> 8); 3158 outb(iobase + com_cfcr, cfcr); 3159 3160 siocnopen(&sp, iobase, comdefaultrate); 3161 3162 splx(s); 3163 if (COM_CONSOLE(flags) && !COM_LLCONSOLE(flags)) { 3164 cp->cn_dev = makedev(CDEV_MAJOR, unit); 3165 cp->cn_pri = COM_FORCECONSOLE(flags) 3166 || boothowto & RB_SERIAL 3167 ? CN_REMOTE : CN_NORMAL; 3168 siocniobase = iobase; 3169 siocnunit = unit; 3170 } 3171 if (COM_DEBUGGER(flags)) { 3172 printf("sio%d: gdb debugging port\n", unit); 3173 siogdbiobase = iobase; 3174 siogdbunit = unit; 3175#if DDB > 0 3176 gdbdev = makedev(CDEV_MAJOR, unit); 3177 gdb_getc = siocngetc; 3178 gdb_putc = siocnputc; 3179#endif 3180 } 3181 } 3182 } 3183#ifdef __i386__ 3184#if DDB > 0 3185 /* 3186 * XXX Ugly Compatability. 3187 * If no gdb port has been specified, set it to be the console 3188 * as some configuration files don't specify the gdb port. 3189 */ 3190 if (gdbdev == NODEV && (boothowto & RB_GDB)) { 3191 printf("Warning: no GDB port specified. Defaulting to sio%d.\n", 3192 siocnunit); 3193 printf("Set flag 0x80 on desired GDB port in your\n"); 3194 printf("configuration file (currently sio only).\n"); 3195 siogdbiobase = siocniobase; 3196 siogdbunit = siocnunit; 3197 gdbdev = makedev(CDEV_MAJOR, siocnunit); 3198 gdb_getc = siocngetc; 3199 gdb_putc = siocnputc; 3200 } 3201#endif 3202#endif 3203} 3204 3205static void 3206siocninit(cp) 3207 struct consdev *cp; 3208{ 3209 comconsole = DEV_TO_UNIT(cp->cn_dev); 3210} 3211 3212#endif 3213 3214#ifdef __alpha__ 3215 3216CONS_DRIVER(sio, NULL, NULL, NULL, siocngetc, siocncheckc, siocnputc, NULL); 3217 3218int 3219siocnattach(port, speed) 3220 int port; 3221 int speed; 3222{ 3223 int s; 3224 u_char cfcr; 3225 struct siocnstate sp; 3226 3227 siocniobase = port; 3228 comdefaultrate = speed; 3229 sio_consdev.cn_pri = CN_NORMAL; 3230 sio_consdev.cn_dev = makedev(CDEV_MAJOR, 0); 3231 3232 s = spltty(); 3233 3234 /* 3235 * Initialize the divisor latch. We can't rely on 3236 * siocnopen() to do this the first time, since it 3237 * avoids writing to the latch if the latch appears 3238 * to have the correct value. Also, if we didn't 3239 * just read the speed from the hardware, then we 3240 * need to set the speed in hardware so that 3241 * switching it later is null. 3242 */ 3243 cfcr = inb(siocniobase + com_cfcr); 3244 outb(siocniobase + com_cfcr, CFCR_DLAB | cfcr); 3245 outb(siocniobase + com_dlbl, 3246 COMBRD(comdefaultrate) & 0xff); 3247 outb(siocniobase + com_dlbh, 3248 (u_int) COMBRD(comdefaultrate) >> 8); 3249 outb(siocniobase + com_cfcr, cfcr); 3250 3251 siocnopen(&sp, siocniobase, comdefaultrate); 3252 splx(s); 3253 3254 cn_tab = &sio_consdev; 3255 return (0); 3256} 3257 3258int 3259siogdbattach(port, speed) 3260 int port; 3261 int speed; 3262{ 3263 int s; 3264 u_char cfcr; 3265 struct siocnstate sp; 3266 int unit = 1; /* XXX !!! */ 3267 3268 siogdbiobase = port; 3269 gdbdefaultrate = speed; 3270 3271 printf("sio%d: gdb debugging port\n", unit); 3272 siogdbunit = unit; 3273#if DDB > 0 3274 gdbdev = makedev(CDEV_MAJOR, unit); 3275 gdb_getc = siocngetc; 3276 gdb_putc = siocnputc; 3277#endif 3278 3279 s = spltty(); 3280 3281 /* 3282 * Initialize the divisor latch. We can't rely on 3283 * siocnopen() to do this the first time, since it 3284 * avoids writing to the latch if the latch appears 3285 * to have the correct value. Also, if we didn't 3286 * just read the speed from the hardware, then we 3287 * need to set the speed in hardware so that 3288 * switching it later is null. 3289 */ 3290 cfcr = inb(siogdbiobase + com_cfcr); 3291 outb(siogdbiobase + com_cfcr, CFCR_DLAB | cfcr); 3292 outb(siogdbiobase + com_dlbl, 3293 COMBRD(gdbdefaultrate) & 0xff); 3294 outb(siogdbiobase + com_dlbh, 3295 (u_int) COMBRD(gdbdefaultrate) >> 8); 3296 outb(siogdbiobase + com_cfcr, cfcr); 3297 3298 siocnopen(&sp, siogdbiobase, gdbdefaultrate); 3299 splx(s); 3300 3301 return (0); 3302} 3303 3304#endif 3305 3306static int 3307siocncheckc(dev) 3308 dev_t dev; 3309{ 3310 int c; 3311 Port_t iobase; 3312 int s; 3313 struct siocnstate sp; 3314 3315 if (minor(dev) == siogdbunit) 3316 iobase = siogdbiobase; 3317 else 3318 iobase = siocniobase; 3319 s = spltty(); 3320 siocnopen(&sp, iobase, comdefaultrate); 3321 if (inb(iobase + com_lsr) & LSR_RXRDY) 3322 c = inb(iobase + com_data); 3323 else 3324 c = -1; 3325 siocnclose(&sp, iobase); 3326 splx(s); 3327 return (c); 3328} 3329 3330 3331int 3332siocngetc(dev) 3333 dev_t dev; 3334{ 3335 int c; 3336 Port_t iobase; 3337 int s; 3338 struct siocnstate sp; 3339 3340 if (minor(dev) == siogdbunit) 3341 iobase = siogdbiobase; 3342 else 3343 iobase = siocniobase; 3344 s = spltty(); 3345 siocnopen(&sp, iobase, comdefaultrate); 3346 while (!(inb(iobase + com_lsr) & LSR_RXRDY)) 3347 ; 3348 c = inb(iobase + com_data); 3349 siocnclose(&sp, iobase); 3350 splx(s); 3351 return (c); 3352} 3353 3354void 3355siocnputc(dev, c) 3356 dev_t dev; 3357 int c; 3358{ 3359 int s; 3360 struct siocnstate sp; 3361 Port_t iobase; 3362 3363 if (minor(dev) == siogdbunit) 3364 iobase = siogdbiobase; 3365 else 3366 iobase = siocniobase; 3367 s = spltty(); 3368 siocnopen(&sp, iobase, comdefaultrate); 3369 siocntxwait(iobase); 3370 outb(iobase + com_data, c); 3371 siocnclose(&sp, iobase); 3372 splx(s); 3373} 3374 3375#ifdef __alpha__ 3376int 3377siogdbgetc() 3378{ 3379 int c; 3380 Port_t iobase; 3381 int s; 3382 struct siocnstate sp; 3383 3384 iobase = siogdbiobase; 3385 s = spltty(); 3386 siocnopen(&sp, iobase, gdbdefaultrate); 3387 while (!(inb(iobase + com_lsr) & LSR_RXRDY)) 3388 ; 3389 c = inb(iobase + com_data); 3390 siocnclose(&sp, iobase); 3391 splx(s); 3392 return (c); 3393} 3394 3395void 3396siogdbputc(c) 3397 int c; 3398{ 3399 int s; 3400 struct siocnstate sp; 3401 3402 s = spltty(); 3403 siocnopen(&sp, siogdbiobase, gdbdefaultrate); 3404 siocntxwait(siogdbiobase); 3405 outb(siogdbiobase + com_data, c); 3406 siocnclose(&sp, siogdbiobase); 3407 splx(s); 3408} 3409#endif 3410 3411DRIVER_MODULE(sio, isa, sio_isa_driver, sio_devclass, 0, 0); 3412#if NCARD > 0 3413DRIVER_MODULE(sio, pccard, sio_pccard_driver, sio_devclass, 0, 0); 3414#endif 3415#if NPCI > 0 3416DRIVER_MODULE(sio, pci, sio_pci_driver, sio_devclass, 0, 0); 3417#endif 3418