sio.c revision 56788
151078Speter/*- 251078Speter * Copyright (c) 1991 The Regents of the University of California. 351078Speter * All rights reserved. 451078Speter * 551078Speter * Redistribution and use in source and binary forms, with or without 651078Speter * modification, are permitted provided that the following conditions 751078Speter * are met: 851078Speter * 1. Redistributions of source code must retain the above copyright 951078Speter * notice, this list of conditions and the following disclaimer. 1051078Speter * 2. Redistributions in binary form must reproduce the above copyright 1151078Speter * notice, this list of conditions and the following disclaimer in the 1251078Speter * documentation and/or other materials provided with the distribution. 1351078Speter * 3. All advertising materials mentioning features or use of this software 1451078Speter * must display the following acknowledgement: 1551078Speter * This product includes software developed by the University of 1651078Speter * California, Berkeley and its contributors. 1751078Speter * 4. Neither the name of the University nor the names of its contributors 1851078Speter * may be used to endorse or promote products derived from this software 1951078Speter * without specific prior written permission. 2051078Speter * 2151078Speter * THIS SOFTWARE IS PROVIDED BY THE REGENTS AND CONTRIBUTORS ``AS IS'' AND 2251078Speter * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE 2351078Speter * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE 2451078Speter * ARE DISCLAIMED. IN NO EVENT SHALL THE REGENTS OR CONTRIBUTORS BE LIABLE 2551078Speter * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL 2651078Speter * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS 2751078Speter * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) 2851078Speter * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT 2951078Speter * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY 3051078Speter * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF 3151078Speter * SUCH DAMAGE. 3251078Speter * 3351078Speter * $FreeBSD: head/sys/dev/sio/sio.c 56788 2000-01-29 03:02:55Z bde $ 3451078Speter * from: @(#)com.c 7.5 (Berkeley) 5/16/91 3551078Speter * from: i386/isa sio.c,v 1.234 3651078Speter */ 3751078Speter 3851078Speter#include "opt_comconsole.h" 3951078Speter#include "opt_compat.h" 4051078Speter#include "opt_ddb.h" 4151078Speter#include "opt_sio.h" 4254386Simp#include "card.h" 4351078Speter#include "sio.h" 4451078Speter 4551078Speter/* 4651078Speter * Serial driver, based on 386BSD-0.1 com driver. 4751078Speter * Mostly rewritten to use pseudo-DMA. 4851078Speter * Works for National Semiconductor NS8250-NS16550AF UARTs. 4951078Speter * COM driver, based on HP dca driver. 5051078Speter * 5151078Speter * Changes for PC-Card integration: 5251078Speter * - Added PC-Card driver table and handlers 5351078Speter */ 5451078Speter#include <sys/param.h> 5551078Speter#include <sys/systm.h> 5651078Speter#include <sys/reboot.h> 5751078Speter#include <sys/malloc.h> 5851078Speter#include <sys/tty.h> 5951078Speter#include <sys/proc.h> 6051078Speter#include <sys/module.h> 6151078Speter#include <sys/conf.h> 6251078Speter#include <sys/dkstat.h> 6351078Speter#include <sys/fcntl.h> 6451078Speter#include <sys/interrupt.h> 6551078Speter#include <sys/kernel.h> 6651078Speter#include <sys/syslog.h> 6751078Speter#include <sys/sysctl.h> 6851078Speter#include <sys/bus.h> 6951078Speter#include <machine/bus.h> 7051078Speter#include <sys/rman.h> 7151078Speter#include <sys/timepps.h> 7251078Speter 7351078Speter#include <isa/isareg.h> 7451078Speter#include <isa/isavar.h> 7551078Speter#include <machine/lock.h> 7651078Speter 7751078Speter#include <machine/clock.h> 7851078Speter#include <machine/ipl.h> 7951078Speter#ifndef SMP 8051078Speter#include <machine/lock.h> 8151078Speter#endif 8251078Speter#include <machine/resource.h> 8351078Speter 8451078Speter#include <isa/sioreg.h> 8551078Speter 8651078Speter#ifdef COM_ESP 8751078Speter#include <isa/ic/esp.h> 8851078Speter#endif 8951078Speter#include <isa/ic/ns16550.h> 9051078Speter 9151078Speter#ifndef __i386__ 9251078Speter#define disable_intr() 9351078Speter#define enable_intr() 9451078Speter#endif 9551078Speter 9651078Speter#ifdef SMP 9751078Speter#define disable_intr() COM_DISABLE_INTR() 9851078Speter#define enable_intr() COM_ENABLE_INTR() 9951078Speter#endif /* SMP */ 10051078Speter 10151078Speter#define LOTS_OF_EVENTS 64 /* helps separate urgent events from input */ 10251078Speter 10351078Speter#define CALLOUT_MASK 0x80 10451078Speter#define CONTROL_MASK 0x60 10551078Speter#define CONTROL_INIT_STATE 0x20 10651078Speter#define CONTROL_LOCK_STATE 0x40 10751078Speter#define DEV_TO_UNIT(dev) (MINOR_TO_UNIT(minor(dev))) 10851078Speter#define MINOR_MAGIC_MASK (CALLOUT_MASK | CONTROL_MASK) 10951078Speter#define MINOR_TO_UNIT(mynor) ((mynor) & ~MINOR_MAGIC_MASK) 11051078Speter 11151078Speter#ifdef COM_MULTIPORT 11251078Speter/* checks in flags for multiport and which is multiport "master chip" 11351078Speter * for a given card 11451078Speter */ 11551078Speter#define COM_ISMULTIPORT(flags) ((flags) & 0x01) 11651078Speter#define COM_MPMASTER(flags) (((flags) >> 8) & 0x0ff) 11751078Speter#define COM_NOTAST4(flags) ((flags) & 0x04) 11851078Speter#endif /* COM_MULTIPORT */ 11951078Speter 12051078Speter#define COM_CONSOLE(flags) ((flags) & 0x10) 12151078Speter#define COM_FORCECONSOLE(flags) ((flags) & 0x20) 12251078Speter#define COM_LLCONSOLE(flags) ((flags) & 0x40) 12351078Speter#define COM_DEBUGGER(flags) ((flags) & 0x80) 12451078Speter#define COM_LOSESOUTINTS(flags) ((flags) & 0x08) 12551078Speter#define COM_NOFIFO(flags) ((flags) & 0x02) 12651078Speter#define COM_ST16650A(flags) ((flags) & 0x20000) 12751078Speter#define COM_C_NOPROBE (0x40000) 12851078Speter#define COM_NOPROBE(flags) ((flags) & COM_C_NOPROBE) 12951078Speter#define COM_C_IIR_TXRDYBUG (0x80000) 13051078Speter#define COM_IIR_TXRDYBUG(flags) ((flags) & COM_C_IIR_TXRDYBUG) 13151078Speter#define COM_FIFOSIZE(flags) (((flags) & 0xff000000) >> 24) 13251078Speter 13351078Speter#define com_scr 7 /* scratch register for 16450-16550 (R/W) */ 13451078Speter 13551078Speter/* 13651078Speter * com state bits. 13751078Speter * (CS_BUSY | CS_TTGO) and (CS_BUSY | CS_TTGO | CS_ODEVREADY) must be higher 13851078Speter * than the other bits so that they can be tested as a group without masking 13951078Speter * off the low bits. 14051078Speter * 14151078Speter * The following com and tty flags correspond closely: 14251078Speter * CS_BUSY = TS_BUSY (maintained by comstart(), siopoll() and 14353344Speter * comstop()) 14451078Speter * CS_TTGO = ~TS_TTSTOP (maintained by comparam() and comstart()) 14551078Speter * CS_CTS_OFLOW = CCTS_OFLOW (maintained by comparam()) 14651078Speter * CS_RTS_IFLOW = CRTS_IFLOW (maintained by comparam()) 14751078Speter * TS_FLUSH is not used. 14851078Speter * XXX I think TIOCSETA doesn't clear TS_TTSTOP when it clears IXON. 14951078Speter * XXX CS_*FLOW should be CF_*FLOW in com->flags (control flags not state). 15051078Speter */ 15151078Speter#define CS_BUSY 0x80 /* output in progress */ 15251078Speter#define CS_TTGO 0x40 /* output not stopped by XOFF */ 15351078Speter#define CS_ODEVREADY 0x20 /* external device h/w ready (CTS) */ 15451078Speter#define CS_CHECKMSR 1 /* check of MSR scheduled */ 15551078Speter#define CS_CTS_OFLOW 2 /* use CTS output flow control */ 15651078Speter#define CS_DTR_OFF 0x10 /* DTR held off */ 15751078Speter#define CS_ODONE 4 /* output completed */ 15851078Speter#define CS_RTS_IFLOW 8 /* use RTS input flow control */ 15951078Speter#define CSE_BUSYCHECK 1 /* siobusycheck() scheduled */ 16051078Speter 16151078Speterstatic char const * const error_desc[] = { 16251078Speter#define CE_OVERRUN 0 16351078Speter "silo overflow", 16451078Speter#define CE_INTERRUPT_BUF_OVERFLOW 1 16551078Speter "interrupt-level buffer overflow", 16651078Speter#define CE_TTY_BUF_OVERFLOW 2 16751078Speter "tty-level buffer overflow", 16851078Speter}; 16951078Speter 17051078Speter#define CE_NTYPES 3 17151078Speter#define CE_RECORD(com, errnum) (++(com)->delta_error_counts[errnum]) 17251078Speter 17351078Speter/* types. XXX - should be elsewhere */ 17451078Spetertypedef u_int Port_t; /* hardware port */ 17551078Spetertypedef u_char bool_t; /* boolean */ 17651078Speter 17751078Speter/* queue of linear buffers */ 17851078Speterstruct lbq { 17951078Speter u_char *l_head; /* next char to process */ 18051078Speter u_char *l_tail; /* one past the last char to process */ 18151078Speter struct lbq *l_next; /* next in queue */ 18251078Speter bool_t l_queued; /* nonzero if queued */ 18351078Speter}; 18451078Speter 18551078Speter/* com device structure */ 18651078Speterstruct com_s { 18751078Speter u_int flags; /* Copy isa device flags */ 18851078Speter u_char state; /* miscellaneous flag bits */ 18951078Speter bool_t active_out; /* nonzero if the callout device is open */ 19051078Speter u_char cfcr_image; /* copy of value written to CFCR */ 19151078Speter#ifdef COM_ESP 19251078Speter bool_t esp; /* is this unit a hayes esp board? */ 19351078Speter#endif 19451078Speter u_char extra_state; /* more flag bits, separate for order trick */ 19551078Speter u_char fifo_image; /* copy of value written to FIFO */ 19651078Speter bool_t hasfifo; /* nonzero for 16550 UARTs */ 19751078Speter bool_t st16650a; /* Is a Startech 16650A or RTS/CTS compat */ 19851078Speter bool_t loses_outints; /* nonzero if device loses output interrupts */ 19951078Speter u_char mcr_image; /* copy of value written to MCR */ 20051078Speter#ifdef COM_MULTIPORT 20151078Speter bool_t multiport; /* is this unit part of a multiport device? */ 20251078Speter#endif /* COM_MULTIPORT */ 20351078Speter bool_t no_irq; /* nonzero if irq is not attached */ 20451078Speter bool_t gone; /* hardware disappeared */ 20551078Speter bool_t poll; /* nonzero if polling is required */ 20651078Speter bool_t poll_output; /* nonzero if polling for output is required */ 20751078Speter int unit; /* unit number */ 20851078Speter int dtr_wait; /* time to hold DTR down on close (* 1/hz) */ 20951078Speter u_int tx_fifo_size; 21051078Speter u_int wopeners; /* # processes waiting for DCD in open() */ 21151078Speter 21251078Speter /* 21351078Speter * The high level of the driver never reads status registers directly 21451078Speter * because there would be too many side effects to handle conveniently. 21551078Speter * Instead, it reads copies of the registers stored here by the 21651078Speter * interrupt handler. 21751078Speter */ 21851078Speter u_char last_modem_status; /* last MSR read by intr handler */ 21951078Speter u_char prev_modem_status; /* last MSR handled by high level */ 22051078Speter 22151078Speter u_char hotchar; /* ldisc-specific char to be handled ASAP */ 22251078Speter u_char *ibuf; /* start of input buffer */ 22351078Speter u_char *ibufend; /* end of input buffer */ 22451078Speter u_char *ibufold; /* old input buffer, to be freed */ 22551078Speter u_char *ihighwater; /* threshold in input buffer */ 22651078Speter u_char *iptr; /* next free spot in input buffer */ 22751078Speter int ibufsize; /* size of ibuf (not include error bytes) */ 22851078Speter int ierroff; /* offset of error bytes in ibuf */ 22951078Speter 23051078Speter struct lbq obufq; /* head of queue of output buffers */ 23151078Speter struct lbq obufs[2]; /* output buffers */ 23251078Speter 23351078Speter Port_t data_port; /* i/o ports */ 23451078Speter#ifdef COM_ESP 23551078Speter Port_t esp_port; 23651078Speter#endif 23751078Speter Port_t int_id_port; 23851078Speter Port_t iobase; 23951078Speter Port_t modem_ctl_port; 24051078Speter Port_t line_status_port; 24151078Speter Port_t modem_status_port; 24251078Speter Port_t intr_ctl_port; /* Ports of IIR register */ 24351078Speter 24451078Speter struct tty *tp; /* cross reference */ 24551078Speter 24651078Speter /* Initial state. */ 24751078Speter struct termios it_in; /* should be in struct tty */ 24851078Speter struct termios it_out; 24951078Speter 25051078Speter /* Lock state. */ 25151078Speter struct termios lt_in; /* should be in struct tty */ 25251078Speter struct termios lt_out; 25351078Speter 25451078Speter bool_t do_timestamp; 25551078Speter bool_t do_dcd_timestamp; 25651078Speter struct timeval timestamp; 25751078Speter struct timeval dcd_timestamp; 25851078Speter struct pps_state pps; 25951078Speter 26051078Speter u_long bytes_in; /* statistics */ 26151078Speter u_long bytes_out; 26251078Speter u_int delta_error_counts[CE_NTYPES]; 26351078Speter u_long error_counts[CE_NTYPES]; 26451078Speter 26551078Speter struct resource *irqres; 26651078Speter struct resource *ioportres; 26754386Simp void *cookie; 26851078Speter 26951078Speter /* 27051078Speter * Data area for output buffers. Someday we should build the output 27151078Speter * buffer queue without copying data. 27251078Speter */ 27351078Speter u_char obuf1[256]; 27451078Speter u_char obuf2[256]; 27551078Speter}; 27651078Speter 27751078Speter#ifdef COM_ESP 27851078Speterstatic int espattach __P((struct com_s *com, Port_t esp_port)); 27951078Speter#endif 28051078Speterstatic int sioattach __P((device_t dev)); 28152471Simpstatic int sio_isa_attach __P((device_t dev)); 28251078Speter 28351078Speterstatic timeout_t siobusycheck; 28451078Speterstatic timeout_t siodtrwakeup; 28551078Speterstatic void comhardclose __P((struct com_s *com)); 28651078Speterstatic void sioinput __P((struct com_s *com)); 28751078Speterstatic void siointr1 __P((struct com_s *com)); 28851078Speterstatic void siointr __P((void *arg)); 28951078Speterstatic int commctl __P((struct com_s *com, int bits, int how)); 29051078Speterstatic int comparam __P((struct tty *tp, struct termios *t)); 29151078Speterstatic swihand_t siopoll; 29251078Speterstatic int sioprobe __P((device_t dev)); 29352471Simpstatic int sio_isa_probe __P((device_t dev)); 29451078Speterstatic void siosettimeout __P((void)); 29551078Speterstatic int siosetwater __P((struct com_s *com, speed_t speed)); 29651078Speterstatic void comstart __P((struct tty *tp)); 29751654Sphkstatic void comstop __P((struct tty *tp, int rw)); 29851078Speterstatic timeout_t comwakeup; 29951078Speterstatic void disc_optim __P((struct tty *tp, struct termios *t, 30051078Speter struct com_s *com)); 30151078Speter 30252471Simp#if NCARD > 0 30352471Simpstatic int sio_pccard_attach __P((device_t dev)); 30454386Simpstatic int sio_pccard_detach __P((device_t dev)); 30552471Simpstatic int sio_pccard_probe __P((device_t dev)); 30652471Simp#endif /* NCARD > 0 */ 30751078Speter 30851078Speterstatic char driver_name[] = "sio"; 30951078Speter 31051078Speter/* table and macro for fast conversion from a unit number to its com struct */ 31151078Speterstatic devclass_t sio_devclass; 31251078Speter#define com_addr(unit) ((struct com_s *) \ 31351078Speter devclass_get_softc(sio_devclass, unit)) 31451078Speter 31552471Simpstatic device_method_t sio_isa_methods[] = { 31651078Speter /* Device interface */ 31752471Simp DEVMETHOD(device_probe, sio_isa_probe), 31852471Simp DEVMETHOD(device_attach, sio_isa_attach), 31951078Speter 32051078Speter { 0, 0 } 32151078Speter}; 32251078Speter 32352471Simpstatic driver_t sio_isa_driver = { 32451078Speter driver_name, 32552471Simp sio_isa_methods, 32651078Speter sizeof(struct com_s), 32751078Speter}; 32851078Speter 32952471Simp#if NCARD > 0 33052471Simpstatic device_method_t sio_pccard_methods[] = { 33152471Simp /* Device interface */ 33252471Simp DEVMETHOD(device_probe, sio_pccard_probe), 33352471Simp DEVMETHOD(device_attach, sio_pccard_attach), 33452471Simp DEVMETHOD(device_detach, sio_pccard_detach), 33552471Simp 33652471Simp { 0, 0 } 33752471Simp}; 33852471Simp 33952471Simpstatic driver_t sio_pccard_driver = { 34052471Simp driver_name, 34152471Simp sio_pccard_methods, 34252471Simp sizeof(struct com_s), 34352471Simp}; 34452471Simp#endif (NCARD > 0) 34552471Simp 34651078Speterstatic d_open_t sioopen; 34751078Speterstatic d_close_t sioclose; 34851078Speterstatic d_read_t sioread; 34951078Speterstatic d_write_t siowrite; 35051078Speterstatic d_ioctl_t sioioctl; 35151078Speter 35251078Speter#define CDEV_MAJOR 28 35351078Speterstatic struct cdevsw sio_cdevsw = { 35451078Speter /* open */ sioopen, 35551078Speter /* close */ sioclose, 35651078Speter /* read */ sioread, 35751078Speter /* write */ siowrite, 35851078Speter /* ioctl */ sioioctl, 35951654Sphk /* poll */ ttypoll, 36051078Speter /* mmap */ nommap, 36151078Speter /* strategy */ nostrategy, 36251078Speter /* name */ driver_name, 36351078Speter /* maj */ CDEV_MAJOR, 36451078Speter /* dump */ nodump, 36551078Speter /* psize */ nopsize, 36651078Speter /* flags */ D_TTY, 36751078Speter /* bmaj */ -1 36851078Speter}; 36951078Speter 37051078Speterint comconsole = -1; 37151078Speterstatic volatile speed_t comdefaultrate = CONSPEED; 37251078Speter#ifdef __alpha__ 37351078Speterstatic volatile speed_t gdbdefaultrate = CONSPEED; 37451078Speter#endif 37551078Speterstatic u_int com_events; /* input chars + weighted output completions */ 37651078Speterstatic Port_t siocniobase; 37751078Speterstatic int siocnunit; 37851078Speterstatic Port_t siogdbiobase; 37951078Speterstatic int siogdbunit = -1; 38051078Speterstatic bool_t sio_registered; 38151078Speterstatic int sio_timeout; 38251078Speterstatic int sio_timeouts_until_log; 38351078Speterstatic struct callout_handle sio_timeout_handle 38451078Speter = CALLOUT_HANDLE_INITIALIZER(&sio_timeout_handle); 38553344Speterstatic int sio_numunits; 38651078Speter 38751078Speterstatic struct speedtab comspeedtab[] = { 38851078Speter { 0, 0 }, 38951078Speter { 50, COMBRD(50) }, 39051078Speter { 75, COMBRD(75) }, 39151078Speter { 110, COMBRD(110) }, 39251078Speter { 134, COMBRD(134) }, 39351078Speter { 150, COMBRD(150) }, 39451078Speter { 200, COMBRD(200) }, 39551078Speter { 300, COMBRD(300) }, 39651078Speter { 600, COMBRD(600) }, 39751078Speter { 1200, COMBRD(1200) }, 39851078Speter { 1800, COMBRD(1800) }, 39951078Speter { 2400, COMBRD(2400) }, 40051078Speter { 4800, COMBRD(4800) }, 40151078Speter { 9600, COMBRD(9600) }, 40251078Speter { 19200, COMBRD(19200) }, 40351078Speter { 38400, COMBRD(38400) }, 40451078Speter { 57600, COMBRD(57600) }, 40551078Speter { 115200, COMBRD(115200) }, 40651078Speter { -1, -1 } 40751078Speter}; 40851078Speter 40951078Speter#ifdef COM_ESP 41051078Speter/* XXX configure this properly. */ 41151078Speterstatic Port_t likely_com_ports[] = { 0x3f8, 0x2f8, 0x3e8, 0x2e8, }; 41251078Speterstatic Port_t likely_esp_ports[] = { 0x140, 0x180, 0x280, 0 }; 41351078Speter#endif 41451078Speter 41551078Speter/* 41651078Speter * handle sysctl read/write requests for console speed 41751078Speter * 41851078Speter * In addition to setting comdefaultrate for I/O through /dev/console, 41951078Speter * also set the initial and lock values for the /dev/ttyXX device 42051078Speter * if there is one associated with the console. Finally, if the /dev/tty 42151078Speter * device has already been open, change the speed on the open running port 42251078Speter * itself. 42351078Speter */ 42451078Speter 42551078Speterstatic int 42651078Spetersysctl_machdep_comdefaultrate SYSCTL_HANDLER_ARGS 42751078Speter{ 42851078Speter int error, s; 42951078Speter speed_t newspeed; 43051078Speter struct com_s *com; 43151078Speter struct tty *tp; 43251078Speter 43351078Speter newspeed = comdefaultrate; 43451078Speter 43551078Speter error = sysctl_handle_opaque(oidp, &newspeed, sizeof newspeed, req); 43651078Speter if (error || !req->newptr) 43751078Speter return (error); 43851078Speter 43951078Speter comdefaultrate = newspeed; 44051078Speter 44151078Speter if (comconsole < 0) /* serial console not selected? */ 44251078Speter return (0); 44351078Speter 44451078Speter com = com_addr(comconsole); 44551078Speter if (!com) 44651078Speter return (ENXIO); 44751078Speter 44851078Speter /* 44951078Speter * set the initial and lock rates for /dev/ttydXX and /dev/cuaXX 45051078Speter * (note, the lock rates really are boolean -- if non-zero, disallow 45151078Speter * speed changes) 45251078Speter */ 45351078Speter com->it_in.c_ispeed = com->it_in.c_ospeed = 45451078Speter com->lt_in.c_ispeed = com->lt_in.c_ospeed = 45551078Speter com->it_out.c_ispeed = com->it_out.c_ospeed = 45651078Speter com->lt_out.c_ispeed = com->lt_out.c_ospeed = comdefaultrate; 45751078Speter 45851078Speter /* 45951078Speter * if we're open, change the running rate too 46051078Speter */ 46151078Speter tp = com->tp; 46251078Speter if (tp && (tp->t_state & TS_ISOPEN)) { 46351078Speter tp->t_termios.c_ispeed = 46451078Speter tp->t_termios.c_ospeed = comdefaultrate; 46551078Speter s = spltty(); 46651078Speter error = comparam(tp, &tp->t_termios); 46751078Speter splx(s); 46851078Speter } 46951078Speter return error; 47051078Speter} 47151078Speter 47251078SpeterSYSCTL_PROC(_machdep, OID_AUTO, conspeed, CTLTYPE_INT | CTLFLAG_RW, 47351078Speter 0, 0, sysctl_machdep_comdefaultrate, "I", ""); 47451078Speter 47553344Speter#define SET_FLAG(dev, bit) device_set_flags(dev, device_get_flags(dev) | (bit)) 47653344Speter#define CLR_FLAG(dev, bit) device_set_flags(dev, device_get_flags(dev) & ~(bit)) 47753344Speter 47851078Speter#if NCARD > 0 47952471Simpstatic int 48052471Simpsio_pccard_probe(dev) 48152471Simp device_t dev; 48251078Speter{ 48354386Simp /* Do not probe IRQ - pccard doesn't turn on the interrupt line */ 48454386Simp /* until bus_setup_intr */ 48553344Speter SET_FLAG(dev, COM_C_NOPROBE); 48653344Speter 48752471Simp return (sioprobe(dev)); 48852471Simp} 48951078Speter 49052471Simpstatic int 49152471Simpsio_pccard_attach(dev) 49252471Simp device_t dev; 49352471Simp{ 49452471Simp return (sioattach(dev)); 49551078Speter} 49651078Speter 49751078Speter/* 49852471Simp * sio_detach - unload the driver and clear the table. 49951078Speter * XXX TODO: 50051078Speter * This is usually called when the card is ejected, but 50151078Speter * can be caused by a modunload of a controller driver. 50251078Speter * The idea is to reset the driver's view of the device 50351078Speter * and ensure that any driver entry points such as 50451078Speter * read and write do not hang. 50551078Speter */ 50653978Simpstatic int 50752471Simpsio_pccard_detach(dev) 50852471Simp device_t dev; 50951078Speter{ 51051078Speter struct com_s *com; 51151078Speter 51252471Simp com = (struct com_s *) device_get_softc(dev); 51351078Speter if (!com) { 51452471Simp device_printf(dev, "NULL com in siounload\n"); 51554386Simp return (0); 51651078Speter } 51751078Speter if (!com->iobase) { 51852471Simp device_printf(dev, "already unloaded!\n"); 51954386Simp return (0); 52051078Speter } 52154386Simp com->gone = 1; 52254386Simp if (com->irqres) { 52354386Simp bus_teardown_intr(dev, com->irqres, com->cookie); 52454386Simp bus_release_resource(dev, SYS_RES_IRQ, 0, com->irqres); 52554386Simp } 52654386Simp if (com->ioportres) 52754386Simp bus_release_resource(dev, SYS_RES_IOPORT, 0, com->ioportres); 52851078Speter if (com->tp && (com->tp->t_state & TS_ISOPEN)) { 52952471Simp device_printf(dev, "unload\n"); 53051078Speter com->tp->t_gen++; 53151078Speter ttyclose(com->tp); 53251078Speter ttwakeup(com->tp); 53351078Speter ttwwakeup(com->tp); 53454386Simp device_printf(dev, "Was busy, so crash likely\n"); 53551078Speter } else { 53651078Speter if (com->ibuf != NULL) 53751078Speter free(com->ibuf, M_DEVBUF); 53854386Simp device_printf(dev, "unload, gone\n"); 53951078Speter } 54053978Simp return (0); 54151078Speter} 54251078Speter#endif /* NCARD > 0 */ 54351078Speter 54451078Speter 54551078Speterstatic struct isa_pnp_id sio_ids[] = { 54651078Speter {0x0005d041, "Standard PC COM port"}, /* PNP0500 */ 54751078Speter {0x0105d041, "16550A-compatible COM port"}, /* PNP0501 */ 54851078Speter {0x0205d041, "Multiport serial device (non-intelligent 16550)"}, /* PNP0502 */ 54951078Speter {0x1005d041, "Generic IRDA-compatible device"}, /* PNP0510 */ 55051078Speter {0x1105d041, "Generic IRDA-compatible device"}, /* PNP0511 */ 55154944Speter /* Devices that do not have a compatid */ 55254944Speter {0x7602a904, NULL}, /* AEI0276 - 56K v.90 Fax Modem (LKT) */ 55354944Speter {0x00007905, NULL}, /* AKY0000 - 56K Plug&Play Modem */ 55454944Speter {0x01405407, NULL}, /* AZT4001 - AZT3000 PnP SOUND DEVICE, MODEM */ 55554944Speter {0x56039008, NULL}, /* BDP0356 - Best Data 56x2 */ 55654944Speter {0x36339008, NULL}, /* BDP3336 - Best Data Prods. 336F */ 55754944Speter {0x0014490a, NULL}, /* BRI1400 - Boca 33.6 PnP */ 55854944Speter {0x0015490a, NULL}, /* BRI1500 - Internal Fax Data */ 55954944Speter {0x0034490a, NULL}, /* BRI3400 - Internal ACF Modem */ 56054944Speter {0x00b4490a, NULL}, /* BRIB400 - Boca 56k PnP */ 56154944Speter {0x0030320d, NULL}, /* CIR3000 - Cirrus Logic V43 */ 56256229Speter {0x0100440e, NULL}, /* CRD0001 - Cardinal MVP288IV ? */ 56354944Speter {0x1200c31e, NULL}, /* GVC0012 - VF1128HV-R9 (win modem?) */ 56454944Speter {0x0303c31e, NULL}, /* GVC0303 - MaxTech 33.6 PnP D/F/V */ 56555124Speter {0x0505c31e, NULL}, /* GVC0505 - GVC 56k Faxmodem */ 56654944Speter {0x0050c31e, NULL}, /* GVC5000 - some GVC modem */ 56754944Speter {0x3800f91e, NULL}, /* GWY0038 - Telepath with v.90 */ 56854944Speter {0x9062f91e, NULL}, /* GWY6290 - Telepath with x2 Technology */ 56954944Speter {0x0000f435, NULL}, /* MOT0000 - Motorola ModemSURFR 33.6 Intern */ 57054944Speter {0x5015f435, NULL}, /* MOT1550 - Motorola ModemSURFR 56K Modem */ 57154944Speter {0xf015f435, NULL}, /* MOT15F0 - Motorola VoiceSURFR 56K Modem */ 57254944Speter {0x6045f435, NULL}, /* MOT4560 - Motorola ? */ 57354944Speter {0x61e7a338, NULL}, /* NECE761 - 33.6Modem */ 57454944Speter {0x39804f3f, NULL}, /* OZO8039 - Zoom 56k flex */ 57554944Speter {0x1000eb49, NULL}, /* ROK0010 - Rockwell ? */ 57654944Speter {0x5002734a, NULL}, /* RSS0250 - 5614Jx3(G) Internal Modem */ 57754944Speter {0xc100ad4d, NULL}, /* SMM00C1 - Leopard 56k PnP */ 57856229Speter {0x9012b04e, NULL}, /* SUP1290 - Supra ? */ 57954944Speter {0x1013b04e, NULL}, /* SUP1310 - SupraExpress 336i PnP */ 58054944Speter {0x8013b04e, NULL}, /* SUP1380 - SupraExpress 288i PnP Voice */ 58154944Speter {0x8113b04e, NULL}, /* SUP1381 - SupraExpress 336i PnP Voice */ 58254944Speter {0x5016b04e, NULL}, /* SUP1650 - Supra 336i Sp Intl */ 58354944Speter {0x7420b04e, NULL}, /* SUP2070 - Supra ? */ 58454944Speter {0x8020b04e, NULL}, /* SUP2080 - Supra ? */ 58554944Speter {0x8420b04e, NULL}, /* SUP2084 - SupraExpress 56i PnP */ 58656229Speter {0x7121b04e, NULL}, /* SUP2171 - SupraExpress 56i Sp? */ 58754944Speter {0x8024b04e, NULL}, /* SUP2480 - Supra ? */ 58854944Speter {0x01007256, NULL}, /* USR0001 - U.S. Robotics Inc., Sportster W */ 58954944Speter {0x02007256, NULL}, /* USR0002 - U.S. Robotics Inc. Sportster 33. */ 59054944Speter {0x04007256, NULL}, /* USR0004 - USR Sportster 14.4k */ 59154944Speter {0x06007256, NULL}, /* USR0006 - USR Sportster 33.6k */ 59256229Speter {0x11007256, NULL}, /* USR0011 - USR ? */ 59354944Speter {0x01017256, NULL}, /* USR0101 - USR ? */ 59454944Speter {0x30207256, NULL}, /* USR2030 - U.S.Robotics Inc. Sportster 560 */ 59554944Speter {0x50207256, NULL}, /* USR2050 - U.S.Robotics Inc. Sportster 33. */ 59654944Speter {0x70207256, NULL}, /* USR2070 - U.S.Robotics Inc. Sportster 560 */ 59754944Speter {0x30307256, NULL}, /* USR3030 - U.S. Robotics 56K FAX INT */ 59854944Speter {0x31307256, NULL}, /* USR3031 - U.S. Robotics 56K FAX INT */ 59954944Speter {0x70307256, NULL}, /* USR3070 - U.S. Robotics 56K Voice INT */ 60056229Speter {0x90307256, NULL}, /* USR3090 - USR ? */ 60154944Speter {0x90917256, NULL}, /* USR9190 - USR 56k Voice INT */ 60254944Speter {0x0300695c, NULL}, /* WCI0003 - Fax/Voice/Modem/Speakphone/Asvd */ 60354944Speter {0x61f7896a, NULL}, /* ZTIF761 - Zoom ComStar 33.6 */ 60451078Speter {0} 60551078Speter}; 60651078Speter 60756229Speter 60856229Speter 60951078Speterstatic int 61052471Simpsio_isa_probe(dev) 61152471Simp device_t dev; 61252471Simp{ 61352471Simp /* Check isapnp ids */ 61452471Simp if (ISA_PNP_PROBE(device_get_parent(dev), dev, sio_ids) == ENXIO) 61552471Simp return (ENXIO); 61652471Simp return (sioprobe(dev)); 61752471Simp} 61852471Simp 61952471Simpstatic int 62051078Spetersioprobe(dev) 62151078Speter device_t dev; 62251078Speter{ 62353344Speter#if 0 62451078Speter static bool_t already_init; 62553344Speter device_t xdev; 62653344Speter#endif 62751078Speter bool_t failures[10]; 62851078Speter int fn; 62951078Speter device_t idev; 63051078Speter Port_t iobase; 63151078Speter intrmask_t irqmap[4]; 63251078Speter intrmask_t irqs; 63351078Speter u_char mcr_image; 63451078Speter int result; 63554206Speter u_long xirq; 63651088Speter u_int flags = device_get_flags(dev); 63751078Speter int rid; 63851078Speter struct resource *port; 63951078Speter 64051078Speter rid = 0; 64151078Speter port = bus_alloc_resource(dev, SYS_RES_IOPORT, &rid, 64251078Speter 0, ~0, IO_COMSIZE, RF_ACTIVE); 64351078Speter if (!port) 64451078Speter return ENXIO; 64551078Speter 64653344Speter#if 0 64753344Speter /* 64853344Speter * XXX this is broken - when we are first called, there are no 64953344Speter * previously configured IO ports. We could hard code 65053344Speter * 0x3f8, 0x2f8, 0x3e8, 0x2e8 etc but that's probably worse. 65153344Speter * This code has been doing nothing since the conversion since 65253344Speter * "count" is zero the first time around. 65353344Speter */ 65451078Speter if (!already_init) { 65551078Speter /* 65651078Speter * Turn off MCR_IENABLE for all likely serial ports. An unused 65751078Speter * port with its MCR_IENABLE gate open will inhibit interrupts 65851078Speter * from any used port that shares the interrupt vector. 65951078Speter * XXX the gate enable is elsewhere for some multiports. 66051078Speter */ 66151078Speter device_t *devs; 66253344Speter int count, i, xioport; 66351078Speter 66451078Speter devclass_get_devices(sio_devclass, &devs, &count); 66551078Speter for (i = 0; i < count; i++) { 66651078Speter xdev = devs[i]; 66754194Speter if (device_is_enabled(xdev) && 66854194Speter bus_get_resource(xdev, SYS_RES_IOPORT, 0, &xioport, 66954194Speter NULL) == 0) 67053344Speter outb(xioport + com_mcr, 0); 67151078Speter } 67251078Speter free(devs, M_TEMP); 67351078Speter already_init = TRUE; 67451078Speter } 67553344Speter#endif 67651078Speter 67751078Speter if (COM_LLCONSOLE(flags)) { 67851078Speter printf("sio%d: reserved for low-level i/o\n", 67951078Speter device_get_unit(dev)); 68056788Sbde bus_release_resource(dev, SYS_RES_IOPORT, rid, port); 68151078Speter return (ENXIO); 68251078Speter } 68351078Speter 68451078Speter /* 68551078Speter * If the device is on a multiport card and has an AST/4 68651078Speter * compatible interrupt control register, initialize this 68751078Speter * register and prepare to leave MCR_IENABLE clear in the mcr. 68851078Speter * Otherwise, prepare to set MCR_IENABLE in the mcr. 68951078Speter * Point idev to the device struct giving the correct id_irq. 69051078Speter * This is the struct for the master device if there is one. 69151078Speter */ 69251078Speter idev = dev; 69351078Speter mcr_image = MCR_IENABLE; 69451078Speter#ifdef COM_MULTIPORT 69553344Speter if (COM_ISMULTIPORT(flags) && !COM_NOTAST4(flags)) { 69654206Speter Port_t xiobase; 69754206Speter u_long io; 69854206Speter 69951078Speter idev = devclass_get_device(sio_devclass, COM_MPMASTER(flags)); 70051078Speter if (idev == NULL) { 70151078Speter printf("sio%d: master device %d not configured\n", 70251078Speter device_get_unit(dev), COM_MPMASTER(flags)); 70351078Speter idev = dev; 70451078Speter } 70554206Speter if (bus_get_resource(idev, SYS_RES_IOPORT, 0, &io, NULL) == 0) { 70654206Speter xiobase = io; 70754194Speter if (bus_get_resource(idev, SYS_RES_IRQ, 0, NULL, NULL)) 70854194Speter outb(xiobase + com_scr, 0x80); /* no irq */ 70954194Speter else 71054194Speter outb(xiobase + com_scr, 0); 71151078Speter } 71253344Speter mcr_image = 0; 71351078Speter } 71451078Speter#endif /* COM_MULTIPORT */ 71554194Speter if (bus_get_resource(idev, SYS_RES_IRQ, 0, NULL, NULL) != 0) 71651078Speter mcr_image = 0; 71751078Speter 71851078Speter bzero(failures, sizeof failures); 71951078Speter iobase = rman_get_start(port); 72051078Speter 72151078Speter /* 72251078Speter * We don't want to get actual interrupts, just masked ones. 72351078Speter * Interrupts from this line should already be masked in the ICU, 72451078Speter * but mask them in the processor as well in case there are some 72551078Speter * (misconfigured) shared interrupts. 72651078Speter */ 72751078Speter disable_intr(); 72851078Speter/* EXTRA DELAY? */ 72951078Speter 73051078Speter /* 73151078Speter * Initialize the speed and the word size and wait long enough to 73251078Speter * drain the maximum of 16 bytes of junk in device output queues. 73351078Speter * The speed is undefined after a master reset and must be set 73451078Speter * before relying on anything related to output. There may be 73551078Speter * junk after a (very fast) soft reboot and (apparently) after 73651078Speter * master reset. 73751078Speter * XXX what about the UART bug avoided by waiting in comparam()? 73851078Speter * We don't want to to wait long enough to drain at 2 bps. 73951078Speter */ 74051078Speter if (iobase == siocniobase) 74151078Speter DELAY((16 + 1) * 1000000 / (comdefaultrate / 10)); 74251078Speter else { 74351078Speter outb(iobase + com_cfcr, CFCR_DLAB | CFCR_8BITS); 74451078Speter outb(iobase + com_dlbl, COMBRD(SIO_TEST_SPEED) & 0xff); 74551078Speter outb(iobase + com_dlbh, (u_int) COMBRD(SIO_TEST_SPEED) >> 8); 74651078Speter outb(iobase + com_cfcr, CFCR_8BITS); 74751078Speter DELAY((16 + 1) * 1000000 / (SIO_TEST_SPEED / 10)); 74851078Speter } 74951078Speter 75051078Speter /* 75151078Speter * Enable the interrupt gate and disable device interupts. This 75251078Speter * should leave the device driving the interrupt line low and 75351078Speter * guarantee an edge trigger if an interrupt can be generated. 75451078Speter */ 75551078Speter/* EXTRA DELAY? */ 75651078Speter outb(iobase + com_mcr, mcr_image); 75751078Speter outb(iobase + com_ier, 0); 75851078Speter DELAY(1000); /* XXX */ 75951078Speter irqmap[0] = isa_irq_pending(); 76051078Speter 76151078Speter /* 76251078Speter * Attempt to set loopback mode so that we can send a null byte 76351078Speter * without annoying any external device. 76451078Speter */ 76551078Speter/* EXTRA DELAY? */ 76651078Speter outb(iobase + com_mcr, mcr_image | MCR_LOOPBACK); 76751078Speter 76851078Speter /* 76951078Speter * Attempt to generate an output interrupt. On 8250's, setting 77051078Speter * IER_ETXRDY generates an interrupt independent of the current 77151078Speter * setting and independent of whether the THR is empty. On 16450's, 77251078Speter * setting IER_ETXRDY generates an interrupt independent of the 77351078Speter * current setting. On 16550A's, setting IER_ETXRDY only 77451078Speter * generates an interrupt when IER_ETXRDY is not already set. 77551078Speter */ 77651078Speter outb(iobase + com_ier, IER_ETXRDY); 77751078Speter 77851078Speter /* 77951078Speter * On some 16x50 incompatibles, setting IER_ETXRDY doesn't generate 78051078Speter * an interrupt. They'd better generate one for actually doing 78151078Speter * output. Loopback may be broken on the same incompatibles but 78251078Speter * it's unlikely to do more than allow the null byte out. 78351078Speter */ 78451078Speter outb(iobase + com_data, 0); 78551078Speter DELAY((1 + 2) * 1000000 / (SIO_TEST_SPEED / 10)); 78651078Speter 78751078Speter /* 78851078Speter * Turn off loopback mode so that the interrupt gate works again 78951078Speter * (MCR_IENABLE was hidden). This should leave the device driving 79051078Speter * an interrupt line high. It doesn't matter if the interrupt 79151078Speter * line oscillates while we are not looking at it, since interrupts 79251078Speter * are disabled. 79351078Speter */ 79451078Speter/* EXTRA DELAY? */ 79551078Speter outb(iobase + com_mcr, mcr_image); 79651078Speter 79751078Speter /* 79852471Simp * Some pcmcia cards have the "TXRDY bug", so we check everyone 79951078Speter * for IIR_TXRDY implementation ( Palido 321s, DC-1S... ) 80051078Speter */ 80153370Speter if (COM_NOPROBE(flags)) { 80253370Speter /* Reading IIR register twice */ 80353370Speter for (fn = 0; fn < 2; fn ++) { 80453370Speter DELAY(10000); 80553370Speter failures[6] = inb(iobase + com_iir); 80653370Speter } 80753370Speter /* Check IIR_TXRDY clear ? */ 80853370Speter result = 0; 80953370Speter if (failures[6] & IIR_TXRDY) { 81053370Speter /* Nop, Double check with clearing IER */ 81153370Speter outb(iobase + com_ier, 0); 81253370Speter if (inb(iobase + com_iir) & IIR_NOPEND) { 81353370Speter /* Ok. we're familia this gang */ 81453370Speter SET_FLAG(dev, COM_C_IIR_TXRDYBUG); 81553370Speter } else { 81653370Speter /* Unknown, Just omit this chip.. XXX */ 81753370Speter result = ENXIO; 81853370Speter } 81951078Speter } else { 82053370Speter /* OK. this is well-known guys */ 82153370Speter CLR_FLAG(dev, COM_C_IIR_TXRDYBUG); 82251078Speter } 82353344Speter outb(iobase + com_cfcr, CFCR_8BITS); 82453344Speter enable_intr(); 82553344Speter bus_release_resource(dev, SYS_RES_IOPORT, rid, port); 82653344Speter return (iobase == siocniobase ? 0 : result); 82753344Speter } 82853344Speter 82951078Speter /* 83051078Speter * Check that 83151078Speter * o the CFCR, IER and MCR in UART hold the values written to them 83251078Speter * (the values happen to be all distinct - this is good for 83351078Speter * avoiding false positive tests from bus echoes). 83451078Speter * o an output interrupt is generated and its vector is correct. 83551078Speter * o the interrupt goes away when the IIR in the UART is read. 83651078Speter */ 83751078Speter/* EXTRA DELAY? */ 83851078Speter failures[0] = inb(iobase + com_cfcr) - CFCR_8BITS; 83951078Speter failures[1] = inb(iobase + com_ier) - IER_ETXRDY; 84051078Speter failures[2] = inb(iobase + com_mcr) - mcr_image; 84151078Speter DELAY(10000); /* Some internal modems need this time */ 84251078Speter irqmap[1] = isa_irq_pending(); 84351078Speter failures[4] = (inb(iobase + com_iir) & IIR_IMASK) - IIR_TXRDY; 84451078Speter DELAY(1000); /* XXX */ 84551078Speter irqmap[2] = isa_irq_pending(); 84651078Speter failures[6] = (inb(iobase + com_iir) & IIR_IMASK) - IIR_NOPEND; 84751078Speter 84851078Speter /* 84951078Speter * Turn off all device interrupts and check that they go off properly. 85051078Speter * Leave MCR_IENABLE alone. For ports without a master port, it gates 85151078Speter * the OUT2 output of the UART to 85251078Speter * the ICU input. Closing the gate would give a floating ICU input 85351078Speter * (unless there is another device driving it) and spurious interrupts. 85451078Speter * (On the system that this was first tested on, the input floats high 85551078Speter * and gives a (masked) interrupt as soon as the gate is closed.) 85651078Speter */ 85751078Speter outb(iobase + com_ier, 0); 85851078Speter outb(iobase + com_cfcr, CFCR_8BITS); /* dummy to avoid bus echo */ 85951078Speter failures[7] = inb(iobase + com_ier); 86051078Speter DELAY(1000); /* XXX */ 86151078Speter irqmap[3] = isa_irq_pending(); 86251078Speter failures[9] = (inb(iobase + com_iir) & IIR_IMASK) - IIR_NOPEND; 86351078Speter 86451078Speter enable_intr(); 86551078Speter 86651078Speter irqs = irqmap[1] & ~irqmap[0]; 86754194Speter if (bus_get_resource(idev, SYS_RES_IRQ, 0, &xirq, NULL) == 0 && 86854194Speter ((1 << xirq) & irqs) == 0) 86951078Speter printf( 87054206Speter "sio%d: configured irq %ld not in bitmap of probed irqs %#x\n", 87153344Speter device_get_unit(dev), xirq, irqs); 87251078Speter if (bootverbose) 87351078Speter printf("sio%d: irq maps: %#x %#x %#x %#x\n", 87451078Speter device_get_unit(dev), 87551078Speter irqmap[0], irqmap[1], irqmap[2], irqmap[3]); 87651078Speter 87751078Speter result = 0; 87851078Speter for (fn = 0; fn < sizeof failures; ++fn) 87951078Speter if (failures[fn]) { 88051078Speter outb(iobase + com_mcr, 0); 88151078Speter result = ENXIO; 88251078Speter if (bootverbose) { 88351078Speter printf("sio%d: probe failed test(s):", 88451078Speter device_get_unit(dev)); 88551078Speter for (fn = 0; fn < sizeof failures; ++fn) 88651078Speter if (failures[fn]) 88751078Speter printf(" %d", fn); 88851078Speter printf("\n"); 88951078Speter } 89051078Speter break; 89151078Speter } 89251078Speter bus_release_resource(dev, SYS_RES_IOPORT, rid, port); 89351078Speter return (iobase == siocniobase ? 0 : result); 89451078Speter} 89551078Speter 89651078Speter#ifdef COM_ESP 89751078Speterstatic int 89851078Speterespattach(com, esp_port) 89951078Speter struct com_s *com; 90051078Speter Port_t esp_port; 90151078Speter{ 90251078Speter u_char dips; 90351078Speter u_char val; 90451078Speter 90551078Speter /* 90651078Speter * Check the ESP-specific I/O port to see if we're an ESP 90751078Speter * card. If not, return failure immediately. 90851078Speter */ 90951078Speter if ((inb(esp_port) & 0xf3) == 0) { 91051078Speter printf(" port 0x%x is not an ESP board?\n", esp_port); 91151078Speter return (0); 91251078Speter } 91351078Speter 91451078Speter /* 91551078Speter * We've got something that claims to be a Hayes ESP card. 91651078Speter * Let's hope so. 91751078Speter */ 91851078Speter 91951078Speter /* Get the dip-switch configuration */ 92051078Speter outb(esp_port + ESP_CMD1, ESP_GETDIPS); 92151078Speter dips = inb(esp_port + ESP_STATUS1); 92251078Speter 92351078Speter /* 92451078Speter * Bits 0,1 of dips say which COM port we are. 92551078Speter */ 92651078Speter if (com->iobase == likely_com_ports[dips & 0x03]) 92751078Speter printf(" : ESP"); 92851078Speter else { 92951078Speter printf(" esp_port has com %d\n", dips & 0x03); 93051078Speter return (0); 93151078Speter } 93251078Speter 93351078Speter /* 93451078Speter * Check for ESP version 2.0 or later: bits 4,5,6 = 010. 93551078Speter */ 93651078Speter outb(esp_port + ESP_CMD1, ESP_GETTEST); 93751078Speter val = inb(esp_port + ESP_STATUS1); /* clear reg 1 */ 93851078Speter val = inb(esp_port + ESP_STATUS2); 93951078Speter if ((val & 0x70) < 0x20) { 94051078Speter printf("-old (%o)", val & 0x70); 94151078Speter return (0); 94251078Speter } 94351078Speter 94451078Speter /* 94551078Speter * Check for ability to emulate 16550: bit 7 == 1 94651078Speter */ 94751078Speter if ((dips & 0x80) == 0) { 94851078Speter printf(" slave"); 94951078Speter return (0); 95051078Speter } 95151078Speter 95251078Speter /* 95351078Speter * Okay, we seem to be a Hayes ESP card. Whee. 95451078Speter */ 95551078Speter com->esp = TRUE; 95651078Speter com->esp_port = esp_port; 95751078Speter return (1); 95851078Speter} 95951078Speter#endif /* COM_ESP */ 96051078Speter 96151078Speterstatic int 96252471Simpsio_isa_attach(dev) 96352471Simp device_t dev; 96452471Simp{ 96552471Simp return (sioattach(dev)); 96652471Simp} 96752471Simp 96852471Simpstatic int 96951078Spetersioattach(dev) 97051078Speter device_t dev; 97151078Speter{ 97251078Speter struct com_s *com; 97351078Speter#ifdef COM_ESP 97451078Speter Port_t *espp; 97551078Speter#endif 97651078Speter Port_t iobase; 97751078Speter int unit; 97853344Speter u_int flags; 97951078Speter int rid; 98051078Speter struct resource *port; 98153344Speter int ret; 98251078Speter 98351078Speter rid = 0; 98451078Speter port = bus_alloc_resource(dev, SYS_RES_IOPORT, &rid, 98551078Speter 0, ~0, IO_COMSIZE, RF_ACTIVE); 98651078Speter if (!port) 98751078Speter return ENXIO; 98851078Speter 98951078Speter iobase = rman_get_start(port); 99051078Speter unit = device_get_unit(dev); 99151078Speter com = device_get_softc(dev); 99253344Speter flags = device_get_flags(dev); 99351078Speter 99453344Speter if (unit >= sio_numunits) 99553344Speter sio_numunits = unit + 1; 99651078Speter /* 99751078Speter * sioprobe() has initialized the device registers as follows: 99851078Speter * o cfcr = CFCR_8BITS. 99951078Speter * It is most important that CFCR_DLAB is off, so that the 100051078Speter * data port is not hidden when we enable interrupts. 100151078Speter * o ier = 0. 100251078Speter * Interrupts are only enabled when the line is open. 100351078Speter * o mcr = MCR_IENABLE, or 0 if the port has AST/4 compatible 100451078Speter * interrupt control register or the config specifies no irq. 100551078Speter * Keeping MCR_DTR and MCR_RTS off might stop the external 100651078Speter * device from sending before we are ready. 100751078Speter */ 100851078Speter bzero(com, sizeof *com); 100951078Speter com->unit = unit; 101051078Speter com->ioportres = port; 101151078Speter com->cfcr_image = CFCR_8BITS; 101251078Speter com->dtr_wait = 3 * hz; 101351078Speter com->loses_outints = COM_LOSESOUTINTS(flags) != 0; 101454194Speter com->no_irq = bus_get_resource(dev, SYS_RES_IRQ, 0, NULL, NULL); 101551078Speter com->tx_fifo_size = 1; 101651078Speter com->obufs[0].l_head = com->obuf1; 101751078Speter com->obufs[1].l_head = com->obuf2; 101851078Speter 101951078Speter com->iobase = iobase; 102051078Speter com->data_port = iobase + com_data; 102151078Speter com->int_id_port = iobase + com_iir; 102251078Speter com->modem_ctl_port = iobase + com_mcr; 102351078Speter com->mcr_image = inb(com->modem_ctl_port); 102451078Speter com->line_status_port = iobase + com_lsr; 102551078Speter com->modem_status_port = iobase + com_msr; 102651078Speter com->intr_ctl_port = iobase + com_ier; 102751078Speter 102851078Speter /* 102951078Speter * We don't use all the flags from <sys/ttydefaults.h> since they 103051078Speter * are only relevant for logins. It's important to have echo off 103151078Speter * initially so that the line doesn't start blathering before the 103251078Speter * echo flag can be turned off. 103351078Speter */ 103451078Speter com->it_in.c_iflag = 0; 103551078Speter com->it_in.c_oflag = 0; 103651078Speter com->it_in.c_cflag = TTYDEF_CFLAG; 103751078Speter com->it_in.c_lflag = 0; 103851078Speter if (unit == comconsole) { 103951078Speter com->it_in.c_iflag = TTYDEF_IFLAG; 104051078Speter com->it_in.c_oflag = TTYDEF_OFLAG; 104151078Speter com->it_in.c_cflag = TTYDEF_CFLAG | CLOCAL; 104251078Speter com->it_in.c_lflag = TTYDEF_LFLAG; 104351078Speter com->lt_out.c_cflag = com->lt_in.c_cflag = CLOCAL; 104451078Speter com->lt_out.c_ispeed = com->lt_out.c_ospeed = 104551078Speter com->lt_in.c_ispeed = com->lt_in.c_ospeed = 104651078Speter com->it_in.c_ispeed = com->it_in.c_ospeed = comdefaultrate; 104751078Speter } else 104851078Speter com->it_in.c_ispeed = com->it_in.c_ospeed = TTYDEF_SPEED; 104951078Speter if (siosetwater(com, com->it_in.c_ispeed) != 0) { 105051078Speter enable_intr(); 105151078Speter free(com, M_DEVBUF); 105256788Sbde /* 105356788Sbde * Leave i/o resources allocated if this is a `cn'-level 105456788Sbde * console, so that other devices can't snarf them. 105556788Sbde */ 105656788Sbde if (iobase != siocniobase) 105756788Sbde bus_release_resource(dev, SYS_RES_IOPORT, rid, port); 105856788Sbde return (ENOMEM); 105951078Speter } 106051078Speter enable_intr(); 106151078Speter termioschars(&com->it_in); 106251078Speter com->it_out = com->it_in; 106351078Speter 106451078Speter /* attempt to determine UART type */ 106551078Speter printf("sio%d: type", unit); 106651078Speter 106751078Speter 106851078Speter#ifdef COM_MULTIPORT 106951078Speter if (!COM_ISMULTIPORT(flags) && !COM_IIR_TXRDYBUG(flags)) 107051078Speter#else 107151078Speter if (!COM_IIR_TXRDYBUG(flags)) 107251078Speter#endif 107351078Speter { 107451078Speter u_char scr; 107551078Speter u_char scr1; 107651078Speter u_char scr2; 107751078Speter 107851078Speter scr = inb(iobase + com_scr); 107951078Speter outb(iobase + com_scr, 0xa5); 108051078Speter scr1 = inb(iobase + com_scr); 108151078Speter outb(iobase + com_scr, 0x5a); 108251078Speter scr2 = inb(iobase + com_scr); 108351078Speter outb(iobase + com_scr, scr); 108451078Speter if (scr1 != 0xa5 || scr2 != 0x5a) { 108551078Speter printf(" 8250"); 108651078Speter goto determined_type; 108751078Speter } 108851078Speter } 108951078Speter outb(iobase + com_fifo, FIFO_ENABLE | FIFO_RX_HIGH); 109051078Speter DELAY(100); 109151078Speter com->st16650a = 0; 109251078Speter switch (inb(com->int_id_port) & IIR_FIFO_MASK) { 109351078Speter case FIFO_RX_LOW: 109451078Speter printf(" 16450"); 109551078Speter break; 109651078Speter case FIFO_RX_MEDL: 109751078Speter printf(" 16450?"); 109851078Speter break; 109951078Speter case FIFO_RX_MEDH: 110051078Speter printf(" 16550?"); 110151078Speter break; 110251078Speter case FIFO_RX_HIGH: 110351078Speter if (COM_NOFIFO(flags)) { 110451078Speter printf(" 16550A fifo disabled"); 110551078Speter } else { 110651078Speter com->hasfifo = TRUE; 110751078Speter if (COM_ST16650A(flags)) { 110851078Speter com->st16650a = 1; 110951078Speter com->tx_fifo_size = 32; 111051078Speter printf(" ST16650A"); 111151078Speter } else { 111251078Speter com->tx_fifo_size = COM_FIFOSIZE(flags); 111351078Speter printf(" 16550A"); 111451078Speter } 111551078Speter } 111651078Speter#ifdef COM_ESP 111751078Speter for (espp = likely_esp_ports; *espp != 0; espp++) 111851078Speter if (espattach(com, *espp)) { 111951078Speter com->tx_fifo_size = 1024; 112051078Speter break; 112151078Speter } 112251078Speter#endif 112351078Speter if (!com->st16650a) { 112451078Speter if (!com->tx_fifo_size) 112551078Speter com->tx_fifo_size = 16; 112651078Speter else 112751078Speter printf(" lookalike with %d bytes FIFO", 112851078Speter com->tx_fifo_size); 112951078Speter } 113051078Speter 113151078Speter break; 113251078Speter } 113351078Speter 113451078Speter#ifdef COM_ESP 113551078Speter if (com->esp) { 113651078Speter /* 113751078Speter * Set 16550 compatibility mode. 113851078Speter * We don't use the ESP_MODE_SCALE bit to increase the 113951078Speter * fifo trigger levels because we can't handle large 114051078Speter * bursts of input. 114151078Speter * XXX flow control should be set in comparam(), not here. 114251078Speter */ 114351078Speter outb(com->esp_port + ESP_CMD1, ESP_SETMODE); 114451078Speter outb(com->esp_port + ESP_CMD2, ESP_MODE_RTS | ESP_MODE_FIFO); 114551078Speter 114651078Speter /* Set RTS/CTS flow control. */ 114751078Speter outb(com->esp_port + ESP_CMD1, ESP_SETFLOWTYPE); 114851078Speter outb(com->esp_port + ESP_CMD2, ESP_FLOW_RTS); 114951078Speter outb(com->esp_port + ESP_CMD2, ESP_FLOW_CTS); 115051078Speter 115151078Speter /* Set flow-control levels. */ 115251078Speter outb(com->esp_port + ESP_CMD1, ESP_SETRXFLOW); 115351078Speter outb(com->esp_port + ESP_CMD2, HIBYTE(768)); 115451078Speter outb(com->esp_port + ESP_CMD2, LOBYTE(768)); 115551078Speter outb(com->esp_port + ESP_CMD2, HIBYTE(512)); 115651078Speter outb(com->esp_port + ESP_CMD2, LOBYTE(512)); 115751078Speter } 115851078Speter#endif /* COM_ESP */ 115951078Speter outb(iobase + com_fifo, 0); 116051078Speterdetermined_type: ; 116151078Speter 116251078Speter#ifdef COM_MULTIPORT 116351078Speter if (COM_ISMULTIPORT(flags)) { 116453344Speter device_t masterdev; 116553344Speter 116651078Speter com->multiport = TRUE; 116751078Speter printf(" (multiport"); 116851078Speter if (unit == COM_MPMASTER(flags)) 116951078Speter printf(" master"); 117051078Speter printf(")"); 117153344Speter masterdev = devclass_get_device(sio_devclass, 117253344Speter COM_MPMASTER(flags)); 117354194Speter com->no_irq = bus_get_resource(masterdev, SYS_RES_IRQ, 0, NULL, 117454194Speter NULL); 117551078Speter } 117651078Speter#endif /* COM_MULTIPORT */ 117751078Speter if (unit == comconsole) 117851078Speter printf(", console"); 117953344Speter if (COM_IIR_TXRDYBUG(flags)) 118051078Speter printf(" with a bogus IIR_TXRDY register"); 118151078Speter printf("\n"); 118251078Speter 118351078Speter if (!sio_registered) { 118451078Speter register_swi(SWI_TTY, siopoll); 118551078Speter sio_registered = TRUE; 118651078Speter } 118751078Speter make_dev(&sio_cdevsw, unit, 118851078Speter UID_ROOT, GID_WHEEL, 0600, "ttyd%r", unit); 118951078Speter make_dev(&sio_cdevsw, unit | CONTROL_INIT_STATE, 119051078Speter UID_ROOT, GID_WHEEL, 0600, "ttyid%r", unit); 119151078Speter make_dev(&sio_cdevsw, unit | CONTROL_LOCK_STATE, 119251078Speter UID_ROOT, GID_WHEEL, 0600, "ttyld%r", unit); 119351078Speter make_dev(&sio_cdevsw, unit | CALLOUT_MASK, 119451078Speter UID_UUCP, GID_DIALER, 0660, "cuaa%r", unit); 119551078Speter make_dev(&sio_cdevsw, unit | CALLOUT_MASK | CONTROL_INIT_STATE, 119651078Speter UID_UUCP, GID_DIALER, 0660, "cuaia%r", unit); 119751078Speter make_dev(&sio_cdevsw, unit | CALLOUT_MASK | CONTROL_LOCK_STATE, 119851078Speter UID_UUCP, GID_DIALER, 0660, "cuala%r", unit); 119951078Speter com->flags = flags; 120051078Speter com->pps.ppscap = PPS_CAPTUREASSERT | PPS_CAPTURECLEAR; 120151078Speter pps_init(&com->pps); 120251078Speter 120351078Speter rid = 0; 120451078Speter com->irqres = bus_alloc_resource(dev, SYS_RES_IRQ, &rid, 0ul, ~0ul, 1, 120553344Speter RF_ACTIVE); 120653344Speter if (com->irqres) { 120753344Speter ret = BUS_SETUP_INTR(device_get_parent(dev), dev, com->irqres, 120854194Speter INTR_TYPE_TTY | INTR_TYPE_FAST, 120954386Simp siointr, com, &com->cookie); 121054194Speter if (ret) { 121154194Speter ret = BUS_SETUP_INTR(device_get_parent(dev), dev, 121254194Speter com->irqres, INTR_TYPE_TTY, 121354386Simp siointr, com, &com->cookie); 121454194Speter if (ret == 0) 121554194Speter device_printf(dev, "unable to activate interrupt in fast mode - using normal mode"); 121654194Speter } 121753344Speter if (ret) 121853344Speter device_printf(dev, "could not activate interrupt\n"); 121953344Speter } 122051078Speter 122151078Speter return (0); 122251078Speter} 122351078Speter 122451078Speterstatic int 122551078Spetersioopen(dev, flag, mode, p) 122651078Speter dev_t dev; 122751078Speter int flag; 122851078Speter int mode; 122951078Speter struct proc *p; 123051078Speter{ 123151078Speter struct com_s *com; 123251078Speter int error; 123351078Speter Port_t iobase; 123451078Speter int mynor; 123551078Speter int s; 123651078Speter struct tty *tp; 123751078Speter int unit; 123851078Speter 123951078Speter mynor = minor(dev); 124051078Speter unit = MINOR_TO_UNIT(mynor); 124153344Speter com = com_addr(unit); 124253344Speter if (com == NULL) 124351078Speter return (ENXIO); 124451078Speter if (com->gone) 124551078Speter return (ENXIO); 124651078Speter if (mynor & CONTROL_MASK) 124751078Speter return (0); 124851078Speter tp = dev->si_tty = com->tp = ttymalloc(com->tp); 124951078Speter s = spltty(); 125051078Speter /* 125151078Speter * We jump to this label after all non-interrupted sleeps to pick 125251078Speter * up any changes of the device state. 125351078Speter */ 125451078Speteropen_top: 125551078Speter while (com->state & CS_DTR_OFF) { 125651078Speter error = tsleep(&com->dtr_wait, TTIPRI | PCATCH, "siodtr", 0); 125751078Speter if (com_addr(unit) == NULL) 125851078Speter return (ENXIO); 125951078Speter if (error != 0 || com->gone) 126051078Speter goto out; 126151078Speter } 126251078Speter if (tp->t_state & TS_ISOPEN) { 126351078Speter /* 126451078Speter * The device is open, so everything has been initialized. 126551078Speter * Handle conflicts. 126651078Speter */ 126751078Speter if (mynor & CALLOUT_MASK) { 126851078Speter if (!com->active_out) { 126951078Speter error = EBUSY; 127051078Speter goto out; 127151078Speter } 127251078Speter } else { 127351078Speter if (com->active_out) { 127451078Speter if (flag & O_NONBLOCK) { 127551078Speter error = EBUSY; 127651078Speter goto out; 127751078Speter } 127851078Speter error = tsleep(&com->active_out, 127951078Speter TTIPRI | PCATCH, "siobi", 0); 128051078Speter if (com_addr(unit) == NULL) 128151078Speter return (ENXIO); 128251078Speter if (error != 0 || com->gone) 128351078Speter goto out; 128451078Speter goto open_top; 128551078Speter } 128651078Speter } 128751078Speter if (tp->t_state & TS_XCLUDE && 128851078Speter suser(p)) { 128951078Speter error = EBUSY; 129051078Speter goto out; 129151078Speter } 129251078Speter } else { 129351078Speter /* 129451078Speter * The device isn't open, so there are no conflicts. 129551078Speter * Initialize it. Initialization is done twice in many 129651078Speter * cases: to preempt sleeping callin opens if we are 129751078Speter * callout, and to complete a callin open after DCD rises. 129851078Speter */ 129951078Speter tp->t_oproc = comstart; 130051078Speter tp->t_param = comparam; 130151654Sphk tp->t_stop = comstop; 130251078Speter tp->t_dev = dev; 130351078Speter tp->t_termios = mynor & CALLOUT_MASK 130451078Speter ? com->it_out : com->it_in; 130551078Speter (void)commctl(com, TIOCM_DTR | TIOCM_RTS, DMSET); 130651078Speter com->poll = com->no_irq; 130751078Speter com->poll_output = com->loses_outints; 130851078Speter ++com->wopeners; 130951078Speter error = comparam(tp, &tp->t_termios); 131051078Speter --com->wopeners; 131151078Speter if (error != 0) 131251078Speter goto out; 131351078Speter /* 131451078Speter * XXX we should goto open_top if comparam() slept. 131551078Speter */ 131651078Speter iobase = com->iobase; 131751078Speter if (com->hasfifo) { 131851078Speter /* 131951078Speter * (Re)enable and drain fifos. 132051078Speter * 132151078Speter * Certain SMC chips cause problems if the fifos 132251078Speter * are enabled while input is ready. Turn off the 132351078Speter * fifo if necessary to clear the input. We test 132451078Speter * the input ready bit after enabling the fifos 132551078Speter * since we've already enabled them in comparam() 132651078Speter * and to handle races between enabling and fresh 132751078Speter * input. 132851078Speter */ 132951078Speter while (TRUE) { 133051078Speter outb(iobase + com_fifo, 133151078Speter FIFO_RCV_RST | FIFO_XMT_RST 133251078Speter | com->fifo_image); 133351078Speter /* 133451078Speter * XXX the delays are for superstitious 133551078Speter * historical reasons. It must be less than 133651078Speter * the character time at the maximum 133751078Speter * supported speed (87 usec at 115200 bps 133851078Speter * 8N1). Otherwise we might loop endlessly 133951078Speter * if data is streaming in. We used to use 134051078Speter * delays of 100. That usually worked 134151078Speter * because DELAY(100) used to usually delay 134251078Speter * for about 85 usec instead of 100. 134351078Speter */ 134451078Speter DELAY(50); 134551078Speter if (!(inb(com->line_status_port) & LSR_RXRDY)) 134651078Speter break; 134751078Speter outb(iobase + com_fifo, 0); 134851078Speter DELAY(50); 134951078Speter (void) inb(com->data_port); 135051078Speter } 135151078Speter } 135251078Speter 135351078Speter disable_intr(); 135451078Speter (void) inb(com->line_status_port); 135551078Speter (void) inb(com->data_port); 135651078Speter com->prev_modem_status = com->last_modem_status 135751078Speter = inb(com->modem_status_port); 135851078Speter if (COM_IIR_TXRDYBUG(com->flags)) { 135951078Speter outb(com->intr_ctl_port, IER_ERXRDY | IER_ERLS 136051078Speter | IER_EMSC); 136151078Speter } else { 136251078Speter outb(com->intr_ctl_port, IER_ERXRDY | IER_ETXRDY 136351078Speter | IER_ERLS | IER_EMSC); 136451078Speter } 136551078Speter enable_intr(); 136651078Speter /* 136751078Speter * Handle initial DCD. Callout devices get a fake initial 136851078Speter * DCD (trapdoor DCD). If we are callout, then any sleeping 136951078Speter * callin opens get woken up and resume sleeping on "siobi" 137051078Speter * instead of "siodcd". 137151078Speter */ 137251078Speter /* 137351078Speter * XXX `mynor & CALLOUT_MASK' should be 137451078Speter * `tp->t_cflag & (SOFT_CARRIER | TRAPDOOR_CARRIER) where 137551078Speter * TRAPDOOR_CARRIER is the default initial state for callout 137651078Speter * devices and SOFT_CARRIER is like CLOCAL except it hides 137751078Speter * the true carrier. 137851078Speter */ 137951078Speter if (com->prev_modem_status & MSR_DCD || mynor & CALLOUT_MASK) 138051078Speter (*linesw[tp->t_line].l_modem)(tp, 1); 138151078Speter } 138251078Speter /* 138351078Speter * Wait for DCD if necessary. 138451078Speter */ 138551078Speter if (!(tp->t_state & TS_CARR_ON) && !(mynor & CALLOUT_MASK) 138651078Speter && !(tp->t_cflag & CLOCAL) && !(flag & O_NONBLOCK)) { 138751078Speter ++com->wopeners; 138851078Speter error = tsleep(TSA_CARR_ON(tp), TTIPRI | PCATCH, "siodcd", 0); 138951078Speter if (com_addr(unit) == NULL) 139051078Speter return (ENXIO); 139151078Speter --com->wopeners; 139251078Speter if (error != 0 || com->gone) 139351078Speter goto out; 139451078Speter goto open_top; 139551078Speter } 139651078Speter error = (*linesw[tp->t_line].l_open)(dev, tp); 139751078Speter disc_optim(tp, &tp->t_termios, com); 139851078Speter if (tp->t_state & TS_ISOPEN && mynor & CALLOUT_MASK) 139951078Speter com->active_out = TRUE; 140051078Speter siosettimeout(); 140151078Speterout: 140251078Speter splx(s); 140351078Speter if (!(tp->t_state & TS_ISOPEN) && com->wopeners == 0) 140451078Speter comhardclose(com); 140551078Speter return (error); 140651078Speter} 140751078Speter 140851078Speterstatic int 140951078Spetersioclose(dev, flag, mode, p) 141051078Speter dev_t dev; 141151078Speter int flag; 141251078Speter int mode; 141351078Speter struct proc *p; 141451078Speter{ 141551078Speter struct com_s *com; 141651078Speter int mynor; 141751078Speter int s; 141851078Speter struct tty *tp; 141951078Speter 142051078Speter mynor = minor(dev); 142151078Speter if (mynor & CONTROL_MASK) 142251078Speter return (0); 142351078Speter com = com_addr(MINOR_TO_UNIT(mynor)); 142451078Speter tp = com->tp; 142551078Speter s = spltty(); 142651078Speter (*linesw[tp->t_line].l_close)(tp, flag); 142751078Speter disc_optim(tp, &tp->t_termios, com); 142851654Sphk comstop(tp, FREAD | FWRITE); 142951078Speter comhardclose(com); 143051078Speter ttyclose(tp); 143151078Speter siosettimeout(); 143251078Speter splx(s); 143351078Speter if (com->gone) { 143451078Speter printf("sio%d: gone\n", com->unit); 143551078Speter s = spltty(); 143651078Speter if (com->ibuf != NULL) 143751078Speter free(com->ibuf, M_DEVBUF); 143851078Speter bzero(tp, sizeof *tp); 143951078Speter free(com, M_DEVBUF); 144051078Speter splx(s); 144151078Speter } 144251078Speter return (0); 144351078Speter} 144451078Speter 144551078Speterstatic void 144651078Spetercomhardclose(com) 144751078Speter struct com_s *com; 144851078Speter{ 144951078Speter Port_t iobase; 145051078Speter int s; 145151078Speter struct tty *tp; 145251078Speter int unit; 145351078Speter 145451078Speter unit = com->unit; 145551078Speter iobase = com->iobase; 145651078Speter s = spltty(); 145751078Speter com->poll = FALSE; 145851078Speter com->poll_output = FALSE; 145951078Speter com->do_timestamp = FALSE; 146051078Speter com->do_dcd_timestamp = FALSE; 146151078Speter com->pps.ppsparam.mode = 0; 146251078Speter outb(iobase + com_cfcr, com->cfcr_image &= ~CFCR_SBREAK); 146351078Speter { 146451078Speter outb(iobase + com_ier, 0); 146551078Speter tp = com->tp; 146651078Speter if (tp->t_cflag & HUPCL 146751078Speter /* 146851078Speter * XXX we will miss any carrier drop between here and the 146951078Speter * next open. Perhaps we should watch DCD even when the 147051078Speter * port is closed; it is not sufficient to check it at 147151078Speter * the next open because it might go up and down while 147251078Speter * we're not watching. 147351078Speter */ 147451078Speter || (!com->active_out 147551078Speter && !(com->prev_modem_status & MSR_DCD) 147651078Speter && !(com->it_in.c_cflag & CLOCAL)) 147751078Speter || !(tp->t_state & TS_ISOPEN)) { 147851078Speter (void)commctl(com, TIOCM_DTR, DMBIC); 147951078Speter if (com->dtr_wait != 0 && !(com->state & CS_DTR_OFF)) { 148051078Speter timeout(siodtrwakeup, com, com->dtr_wait); 148151078Speter com->state |= CS_DTR_OFF; 148251078Speter } 148351078Speter } 148451078Speter } 148551078Speter if (com->hasfifo) { 148651078Speter /* 148751078Speter * Disable fifos so that they are off after controlled 148851078Speter * reboots. Some BIOSes fail to detect 16550s when the 148951078Speter * fifos are enabled. 149051078Speter */ 149151078Speter outb(iobase + com_fifo, 0); 149251078Speter } 149351078Speter com->active_out = FALSE; 149451078Speter wakeup(&com->active_out); 149551078Speter wakeup(TSA_CARR_ON(tp)); /* restart any wopeners */ 149651078Speter splx(s); 149751078Speter} 149851078Speter 149951078Speterstatic int 150051078Spetersioread(dev, uio, flag) 150151078Speter dev_t dev; 150251078Speter struct uio *uio; 150351078Speter int flag; 150451078Speter{ 150551078Speter int mynor; 150651078Speter struct com_s *com; 150751078Speter 150851078Speter mynor = minor(dev); 150951078Speter if (mynor & CONTROL_MASK) 151051078Speter return (ENODEV); 151151078Speter com = com_addr(MINOR_TO_UNIT(mynor)); 151251078Speter if (com->gone) 151351078Speter return (ENODEV); 151451078Speter return ((*linesw[com->tp->t_line].l_read)(com->tp, uio, flag)); 151551078Speter} 151651078Speter 151751078Speterstatic int 151851078Spetersiowrite(dev, uio, flag) 151951078Speter dev_t dev; 152051078Speter struct uio *uio; 152151078Speter int flag; 152251078Speter{ 152351078Speter int mynor; 152451078Speter struct com_s *com; 152551078Speter int unit; 152651078Speter 152751078Speter mynor = minor(dev); 152851078Speter if (mynor & CONTROL_MASK) 152951078Speter return (ENODEV); 153051078Speter 153151078Speter unit = MINOR_TO_UNIT(mynor); 153251078Speter com = com_addr(unit); 153351078Speter if (com->gone) 153451078Speter return (ENODEV); 153551078Speter /* 153651078Speter * (XXX) We disallow virtual consoles if the physical console is 153751078Speter * a serial port. This is in case there is a display attached that 153851078Speter * is not the console. In that situation we don't need/want the X 153951078Speter * server taking over the console. 154051078Speter */ 154151078Speter if (constty != NULL && unit == comconsole) 154251078Speter constty = NULL; 154351078Speter return ((*linesw[com->tp->t_line].l_write)(com->tp, uio, flag)); 154451078Speter} 154551078Speter 154651078Speterstatic void 154751078Spetersiobusycheck(chan) 154851078Speter void *chan; 154951078Speter{ 155051078Speter struct com_s *com; 155151078Speter int s; 155251078Speter 155351078Speter com = (struct com_s *)chan; 155451078Speter 155551078Speter /* 155651078Speter * Clear TS_BUSY if low-level output is complete. 155751078Speter * spl locking is sufficient because siointr1() does not set CS_BUSY. 155851078Speter * If siointr1() clears CS_BUSY after we look at it, then we'll get 155951078Speter * called again. Reading the line status port outside of siointr1() 156051078Speter * is safe because CS_BUSY is clear so there are no output interrupts 156151078Speter * to lose. 156251078Speter */ 156351078Speter s = spltty(); 156451078Speter if (com->state & CS_BUSY) 156551078Speter com->extra_state &= ~CSE_BUSYCHECK; /* False alarm. */ 156651078Speter else if ((inb(com->line_status_port) & (LSR_TSRE | LSR_TXRDY)) 156751078Speter == (LSR_TSRE | LSR_TXRDY)) { 156851078Speter com->tp->t_state &= ~TS_BUSY; 156951078Speter ttwwakeup(com->tp); 157051078Speter com->extra_state &= ~CSE_BUSYCHECK; 157151078Speter } else 157251078Speter timeout(siobusycheck, com, hz / 100); 157351078Speter splx(s); 157451078Speter} 157551078Speter 157651078Speterstatic void 157751078Spetersiodtrwakeup(chan) 157851078Speter void *chan; 157951078Speter{ 158051078Speter struct com_s *com; 158151078Speter 158251078Speter com = (struct com_s *)chan; 158351078Speter com->state &= ~CS_DTR_OFF; 158451078Speter wakeup(&com->dtr_wait); 158551078Speter} 158651078Speter 158751078Speterstatic void 158851078Spetersioinput(com) 158951078Speter struct com_s *com; 159051078Speter{ 159151078Speter u_char *buf; 159251078Speter int incc; 159351078Speter u_char line_status; 159451078Speter int recv_data; 159551078Speter struct tty *tp; 159651078Speter 159751078Speter buf = com->ibuf; 159851078Speter tp = com->tp; 159951078Speter if (!(tp->t_state & TS_ISOPEN) || !(tp->t_cflag & CREAD)) { 160051078Speter com_events -= (com->iptr - com->ibuf); 160151078Speter com->iptr = com->ibuf; 160251078Speter return; 160351078Speter } 160451078Speter if (tp->t_state & TS_CAN_BYPASS_L_RINT) { 160551078Speter /* 160651078Speter * Avoid the grotesquely inefficient lineswitch routine 160751078Speter * (ttyinput) in "raw" mode. It usually takes about 450 160851078Speter * instructions (that's without canonical processing or echo!). 160951078Speter * slinput is reasonably fast (usually 40 instructions plus 161051078Speter * call overhead). 161151078Speter */ 161251078Speter do { 161351078Speter enable_intr(); 161451078Speter incc = com->iptr - buf; 161551078Speter if (tp->t_rawq.c_cc + incc > tp->t_ihiwat 161651078Speter && (com->state & CS_RTS_IFLOW 161751078Speter || tp->t_iflag & IXOFF) 161851078Speter && !(tp->t_state & TS_TBLOCK)) 161951078Speter ttyblock(tp); 162051078Speter com->delta_error_counts[CE_TTY_BUF_OVERFLOW] 162151078Speter += b_to_q((char *)buf, incc, &tp->t_rawq); 162251078Speter buf += incc; 162351078Speter tk_nin += incc; 162451078Speter tk_rawcc += incc; 162551078Speter tp->t_rawcc += incc; 162651078Speter ttwakeup(tp); 162751078Speter if (tp->t_state & TS_TTSTOP 162851078Speter && (tp->t_iflag & IXANY 162951078Speter || tp->t_cc[VSTART] == tp->t_cc[VSTOP])) { 163051078Speter tp->t_state &= ~TS_TTSTOP; 163151078Speter tp->t_lflag &= ~FLUSHO; 163251078Speter comstart(tp); 163351078Speter } 163451078Speter disable_intr(); 163551078Speter } while (buf < com->iptr); 163651078Speter } else { 163751078Speter do { 163851078Speter enable_intr(); 163951078Speter line_status = buf[com->ierroff]; 164051078Speter recv_data = *buf++; 164151078Speter if (line_status 164251078Speter & (LSR_BI | LSR_FE | LSR_OE | LSR_PE)) { 164351078Speter if (line_status & LSR_BI) 164451078Speter recv_data |= TTY_BI; 164551078Speter if (line_status & LSR_FE) 164651078Speter recv_data |= TTY_FE; 164751078Speter if (line_status & LSR_OE) 164851078Speter recv_data |= TTY_OE; 164951078Speter if (line_status & LSR_PE) 165051078Speter recv_data |= TTY_PE; 165151078Speter } 165251078Speter (*linesw[tp->t_line].l_rint)(recv_data, tp); 165351078Speter disable_intr(); 165451078Speter } while (buf < com->iptr); 165551078Speter } 165651078Speter com_events -= (com->iptr - com->ibuf); 165751078Speter com->iptr = com->ibuf; 165851078Speter 165951078Speter /* 166051078Speter * There is now room for another low-level buffer full of input, 166151078Speter * so enable RTS if it is now disabled and there is room in the 166251078Speter * high-level buffer. 166351078Speter */ 166451078Speter if ((com->state & CS_RTS_IFLOW) && !(com->mcr_image & MCR_RTS) && 166551078Speter !(tp->t_state & TS_TBLOCK)) 166651078Speter outb(com->modem_ctl_port, com->mcr_image |= MCR_RTS); 166751078Speter} 166851078Speter 166951078Spetervoid 167051078Spetersiointr(arg) 167151078Speter void *arg; 167251078Speter{ 167351078Speter#ifndef COM_MULTIPORT 167451078Speter COM_LOCK(); 167551078Speter siointr1((struct com_s *) arg); 167651078Speter COM_UNLOCK(); 167751078Speter#else /* COM_MULTIPORT */ 167851078Speter bool_t possibly_more_intrs; 167951078Speter int unit; 168051078Speter struct com_s *com; 168151078Speter 168251078Speter /* 168351078Speter * Loop until there is no activity on any port. This is necessary 168451078Speter * to get an interrupt edge more than to avoid another interrupt. 168551078Speter * If the IRQ signal is just an OR of the IRQ signals from several 168651078Speter * devices, then the edge from one may be lost because another is 168751078Speter * on. 168851078Speter */ 168951078Speter COM_LOCK(); 169051078Speter do { 169151078Speter possibly_more_intrs = FALSE; 169253344Speter for (unit = 0; unit < sio_numunits; ++unit) { 169351078Speter com = com_addr(unit); 169451078Speter /* 169551078Speter * XXX COM_LOCK(); 169651078Speter * would it work here, or be counter-productive? 169751078Speter */ 169851078Speter if (com != NULL 169951078Speter && !com->gone 170051078Speter && (inb(com->int_id_port) & IIR_IMASK) 170151078Speter != IIR_NOPEND) { 170251078Speter siointr1(com); 170351078Speter possibly_more_intrs = TRUE; 170451078Speter } 170551078Speter /* XXX COM_UNLOCK(); */ 170651078Speter } 170751078Speter } while (possibly_more_intrs); 170851078Speter COM_UNLOCK(); 170951078Speter#endif /* COM_MULTIPORT */ 171051078Speter} 171151078Speter 171251078Speterstatic void 171351078Spetersiointr1(com) 171451078Speter struct com_s *com; 171551078Speter{ 171651078Speter u_char line_status; 171751078Speter u_char modem_status; 171851078Speter u_char *ioptr; 171951078Speter u_char recv_data; 172051078Speter u_char int_ctl; 172151078Speter u_char int_ctl_new; 172251078Speter struct timecounter *tc; 172351078Speter u_int count; 172451078Speter 172551078Speter int_ctl = inb(com->intr_ctl_port); 172651078Speter int_ctl_new = int_ctl; 172751078Speter 172851078Speter while (!com->gone) { 172951078Speter if (com->pps.ppsparam.mode & PPS_CAPTUREBOTH) { 173051078Speter modem_status = inb(com->modem_status_port); 173151078Speter if ((modem_status ^ com->last_modem_status) & MSR_DCD) { 173251078Speter tc = timecounter; 173351078Speter count = tc->tc_get_timecount(tc); 173451078Speter pps_event(&com->pps, tc, count, 173551078Speter (modem_status & MSR_DCD) ? 173651078Speter PPS_CAPTUREASSERT : PPS_CAPTURECLEAR); 173751078Speter } 173851078Speter } 173951078Speter line_status = inb(com->line_status_port); 174051078Speter 174151078Speter /* input event? (check first to help avoid overruns) */ 174251078Speter while (line_status & LSR_RCV_MASK) { 174351078Speter /* break/unnattached error bits or real input? */ 174451078Speter if (!(line_status & LSR_RXRDY)) 174551078Speter recv_data = 0; 174651078Speter else 174751078Speter recv_data = inb(com->data_port); 174851078Speter if (line_status & (LSR_BI | LSR_FE | LSR_PE)) { 174951078Speter /* 175051078Speter * Don't store BI if IGNBRK or FE/PE if IGNPAR. 175151078Speter * Otherwise, push the work to a higher level 175251078Speter * (to handle PARMRK) if we're bypassing. 175351078Speter * Otherwise, convert BI/FE and PE+INPCK to 0. 175451078Speter * 175551078Speter * This makes bypassing work right in the 175651078Speter * usual "raw" case (IGNBRK set, and IGNPAR 175751078Speter * and INPCK clear). 175851078Speter * 175951078Speter * Note: BI together with FE/PE means just BI. 176051078Speter */ 176151078Speter if (line_status & LSR_BI) { 176251078Speter#if defined(DDB) && defined(BREAK_TO_DEBUGGER) 176351078Speter if (com->unit == comconsole) { 176451078Speter breakpoint(); 176551078Speter goto cont; 176651078Speter } 176751078Speter#endif 176851078Speter if (com->tp == NULL 176951078Speter || com->tp->t_iflag & IGNBRK) 177051078Speter goto cont; 177151078Speter } else { 177251078Speter if (com->tp == NULL 177351078Speter || com->tp->t_iflag & IGNPAR) 177451078Speter goto cont; 177551078Speter } 177651078Speter if (com->tp->t_state & TS_CAN_BYPASS_L_RINT 177751078Speter && (line_status & (LSR_BI | LSR_FE) 177851078Speter || com->tp->t_iflag & INPCK)) 177951078Speter recv_data = 0; 178051078Speter } 178151078Speter ++com->bytes_in; 178251078Speter if (com->hotchar != 0 && recv_data == com->hotchar) 178351078Speter setsofttty(); 178451078Speter ioptr = com->iptr; 178551078Speter if (ioptr >= com->ibufend) 178651078Speter CE_RECORD(com, CE_INTERRUPT_BUF_OVERFLOW); 178751078Speter else { 178851078Speter if (com->do_timestamp) 178951078Speter microtime(&com->timestamp); 179051078Speter ++com_events; 179151078Speter schedsofttty(); 179251078Speter#if 0 /* for testing input latency vs efficiency */ 179351078Speterif (com->iptr - com->ibuf == 8) 179451078Speter setsofttty(); 179551078Speter#endif 179651078Speter ioptr[0] = recv_data; 179751078Speter ioptr[com->ierroff] = line_status; 179851078Speter com->iptr = ++ioptr; 179951078Speter if (ioptr == com->ihighwater 180051078Speter && com->state & CS_RTS_IFLOW) 180151078Speter outb(com->modem_ctl_port, 180251078Speter com->mcr_image &= ~MCR_RTS); 180351078Speter if (line_status & LSR_OE) 180451078Speter CE_RECORD(com, CE_OVERRUN); 180551078Speter } 180651078Spetercont: 180751078Speter /* 180851078Speter * "& 0x7F" is to avoid the gcc-1.40 generating a slow 180951078Speter * jump from the top of the loop to here 181051078Speter */ 181151078Speter line_status = inb(com->line_status_port) & 0x7F; 181251078Speter } 181351078Speter 181451078Speter /* modem status change? (always check before doing output) */ 181551078Speter modem_status = inb(com->modem_status_port); 181651078Speter if (modem_status != com->last_modem_status) { 181751078Speter if (com->do_dcd_timestamp 181851078Speter && !(com->last_modem_status & MSR_DCD) 181951078Speter && modem_status & MSR_DCD) 182051078Speter microtime(&com->dcd_timestamp); 182151078Speter 182251078Speter /* 182351078Speter * Schedule high level to handle DCD changes. Note 182451078Speter * that we don't use the delta bits anywhere. Some 182551078Speter * UARTs mess them up, and it's easy to remember the 182651078Speter * previous bits and calculate the delta. 182751078Speter */ 182851078Speter com->last_modem_status = modem_status; 182951078Speter if (!(com->state & CS_CHECKMSR)) { 183051078Speter com_events += LOTS_OF_EVENTS; 183151078Speter com->state |= CS_CHECKMSR; 183251078Speter setsofttty(); 183351078Speter } 183451078Speter 183551078Speter /* handle CTS change immediately for crisp flow ctl */ 183651078Speter if (com->state & CS_CTS_OFLOW) { 183751078Speter if (modem_status & MSR_CTS) 183851078Speter com->state |= CS_ODEVREADY; 183951078Speter else 184051078Speter com->state &= ~CS_ODEVREADY; 184151078Speter } 184251078Speter } 184351078Speter 184451078Speter /* output queued and everything ready? */ 184551078Speter if (line_status & LSR_TXRDY 184651078Speter && com->state >= (CS_BUSY | CS_TTGO | CS_ODEVREADY)) { 184751078Speter ioptr = com->obufq.l_head; 184851078Speter if (com->tx_fifo_size > 1) { 184951078Speter u_int ocount; 185051078Speter 185151078Speter ocount = com->obufq.l_tail - ioptr; 185251078Speter if (ocount > com->tx_fifo_size) 185351078Speter ocount = com->tx_fifo_size; 185451078Speter com->bytes_out += ocount; 185551078Speter do 185651078Speter outb(com->data_port, *ioptr++); 185751078Speter while (--ocount != 0); 185851078Speter } else { 185951078Speter outb(com->data_port, *ioptr++); 186051078Speter ++com->bytes_out; 186151078Speter } 186251078Speter com->obufq.l_head = ioptr; 186351078Speter if (COM_IIR_TXRDYBUG(com->flags)) { 186451078Speter int_ctl_new = int_ctl | IER_ETXRDY; 186551078Speter } 186651078Speter if (ioptr >= com->obufq.l_tail) { 186751078Speter struct lbq *qp; 186851078Speter 186951078Speter qp = com->obufq.l_next; 187051078Speter qp->l_queued = FALSE; 187151078Speter qp = qp->l_next; 187251078Speter if (qp != NULL) { 187351078Speter com->obufq.l_head = qp->l_head; 187451078Speter com->obufq.l_tail = qp->l_tail; 187551078Speter com->obufq.l_next = qp; 187651078Speter } else { 187751078Speter /* output just completed */ 187853344Speter if (COM_IIR_TXRDYBUG(com->flags)) { 187951078Speter int_ctl_new = int_ctl & ~IER_ETXRDY; 188051078Speter } 188151078Speter com->state &= ~CS_BUSY; 188251078Speter } 188351078Speter if (!(com->state & CS_ODONE)) { 188451078Speter com_events += LOTS_OF_EVENTS; 188551078Speter com->state |= CS_ODONE; 188651078Speter setsofttty(); /* handle at high level ASAP */ 188751078Speter } 188851078Speter } 188953344Speter if (COM_IIR_TXRDYBUG(com->flags) && (int_ctl != int_ctl_new)) { 189051078Speter outb(com->intr_ctl_port, int_ctl_new); 189151078Speter } 189251078Speter } 189351078Speter 189451078Speter /* finished? */ 189551078Speter#ifndef COM_MULTIPORT 189651078Speter if ((inb(com->int_id_port) & IIR_IMASK) == IIR_NOPEND) 189751078Speter#endif /* COM_MULTIPORT */ 189851078Speter return; 189951078Speter } 190051078Speter} 190151078Speter 190251078Speterstatic int 190351078Spetersioioctl(dev, cmd, data, flag, p) 190451078Speter dev_t dev; 190551078Speter u_long cmd; 190651078Speter caddr_t data; 190751078Speter int flag; 190851078Speter struct proc *p; 190951078Speter{ 191051078Speter struct com_s *com; 191151078Speter int error; 191251078Speter Port_t iobase; 191351078Speter int mynor; 191451078Speter int s; 191551078Speter struct tty *tp; 191651078Speter#if defined(COMPAT_43) || defined(COMPAT_SUNOS) 191751078Speter u_long oldcmd; 191851078Speter struct termios term; 191951078Speter#endif 192051078Speter 192151078Speter mynor = minor(dev); 192251078Speter com = com_addr(MINOR_TO_UNIT(mynor)); 192351078Speter if (com->gone) 192451078Speter return (ENODEV); 192551078Speter iobase = com->iobase; 192651078Speter if (mynor & CONTROL_MASK) { 192751078Speter struct termios *ct; 192851078Speter 192951078Speter switch (mynor & CONTROL_MASK) { 193051078Speter case CONTROL_INIT_STATE: 193151078Speter ct = mynor & CALLOUT_MASK ? &com->it_out : &com->it_in; 193251078Speter break; 193351078Speter case CONTROL_LOCK_STATE: 193451078Speter ct = mynor & CALLOUT_MASK ? &com->lt_out : &com->lt_in; 193551078Speter break; 193651078Speter default: 193751078Speter return (ENODEV); /* /dev/nodev */ 193851078Speter } 193951078Speter switch (cmd) { 194051078Speter case TIOCSETA: 194151078Speter error = suser(p); 194251078Speter if (error != 0) 194351078Speter return (error); 194451078Speter *ct = *(struct termios *)data; 194551078Speter return (0); 194651078Speter case TIOCGETA: 194751078Speter *(struct termios *)data = *ct; 194851078Speter return (0); 194951078Speter case TIOCGETD: 195051078Speter *(int *)data = TTYDISC; 195151078Speter return (0); 195251078Speter case TIOCGWINSZ: 195351078Speter bzero(data, sizeof(struct winsize)); 195451078Speter return (0); 195551078Speter default: 195651078Speter return (ENOTTY); 195751078Speter } 195851078Speter } 195951078Speter tp = com->tp; 196051078Speter#if defined(COMPAT_43) || defined(COMPAT_SUNOS) 196151078Speter term = tp->t_termios; 196251078Speter oldcmd = cmd; 196351078Speter error = ttsetcompat(tp, &cmd, data, &term); 196451078Speter if (error != 0) 196551078Speter return (error); 196651078Speter if (cmd != oldcmd) 196751078Speter data = (caddr_t)&term; 196851078Speter#endif 196951078Speter if (cmd == TIOCSETA || cmd == TIOCSETAW || cmd == TIOCSETAF) { 197051078Speter int cc; 197151078Speter struct termios *dt = (struct termios *)data; 197251078Speter struct termios *lt = mynor & CALLOUT_MASK 197351078Speter ? &com->lt_out : &com->lt_in; 197451078Speter 197551078Speter dt->c_iflag = (tp->t_iflag & lt->c_iflag) 197651078Speter | (dt->c_iflag & ~lt->c_iflag); 197751078Speter dt->c_oflag = (tp->t_oflag & lt->c_oflag) 197851078Speter | (dt->c_oflag & ~lt->c_oflag); 197951078Speter dt->c_cflag = (tp->t_cflag & lt->c_cflag) 198051078Speter | (dt->c_cflag & ~lt->c_cflag); 198151078Speter dt->c_lflag = (tp->t_lflag & lt->c_lflag) 198251078Speter | (dt->c_lflag & ~lt->c_lflag); 198351078Speter for (cc = 0; cc < NCCS; ++cc) 198451078Speter if (lt->c_cc[cc] != 0) 198551078Speter dt->c_cc[cc] = tp->t_cc[cc]; 198651078Speter if (lt->c_ispeed != 0) 198751078Speter dt->c_ispeed = tp->t_ispeed; 198851078Speter if (lt->c_ospeed != 0) 198951078Speter dt->c_ospeed = tp->t_ospeed; 199051078Speter } 199151078Speter error = (*linesw[tp->t_line].l_ioctl)(tp, cmd, data, flag, p); 199251078Speter if (error != ENOIOCTL) 199351078Speter return (error); 199451078Speter s = spltty(); 199551078Speter error = ttioctl(tp, cmd, data, flag); 199651078Speter disc_optim(tp, &tp->t_termios, com); 199751078Speter if (error != ENOIOCTL) { 199851078Speter splx(s); 199951078Speter return (error); 200051078Speter } 200151078Speter switch (cmd) { 200251078Speter case TIOCSBRK: 200351078Speter outb(iobase + com_cfcr, com->cfcr_image |= CFCR_SBREAK); 200451078Speter break; 200551078Speter case TIOCCBRK: 200651078Speter outb(iobase + com_cfcr, com->cfcr_image &= ~CFCR_SBREAK); 200751078Speter break; 200851078Speter case TIOCSDTR: 200951078Speter (void)commctl(com, TIOCM_DTR, DMBIS); 201051078Speter break; 201151078Speter case TIOCCDTR: 201251078Speter (void)commctl(com, TIOCM_DTR, DMBIC); 201351078Speter break; 201451078Speter /* 201551078Speter * XXX should disallow changing MCR_RTS if CS_RTS_IFLOW is set. The 201651078Speter * changes get undone on the next call to comparam(). 201751078Speter */ 201851078Speter case TIOCMSET: 201951078Speter (void)commctl(com, *(int *)data, DMSET); 202051078Speter break; 202151078Speter case TIOCMBIS: 202251078Speter (void)commctl(com, *(int *)data, DMBIS); 202351078Speter break; 202451078Speter case TIOCMBIC: 202551078Speter (void)commctl(com, *(int *)data, DMBIC); 202651078Speter break; 202751078Speter case TIOCMGET: 202851078Speter *(int *)data = commctl(com, 0, DMGET); 202951078Speter break; 203051078Speter case TIOCMSDTRWAIT: 203151078Speter /* must be root since the wait applies to following logins */ 203251078Speter error = suser(p); 203351078Speter if (error != 0) { 203451078Speter splx(s); 203551078Speter return (error); 203651078Speter } 203751078Speter com->dtr_wait = *(int *)data * hz / 100; 203851078Speter break; 203951078Speter case TIOCMGDTRWAIT: 204051078Speter *(int *)data = com->dtr_wait * 100 / hz; 204151078Speter break; 204251078Speter case TIOCTIMESTAMP: 204351078Speter com->do_timestamp = TRUE; 204451078Speter *(struct timeval *)data = com->timestamp; 204551078Speter break; 204651078Speter case TIOCDCDTIMESTAMP: 204751078Speter com->do_dcd_timestamp = TRUE; 204851078Speter *(struct timeval *)data = com->dcd_timestamp; 204951078Speter break; 205051078Speter default: 205151078Speter splx(s); 205251078Speter error = pps_ioctl(cmd, data, &com->pps); 205351078Speter if (error == ENODEV) 205451078Speter error = ENOTTY; 205551078Speter return (error); 205651078Speter } 205751078Speter splx(s); 205851078Speter return (0); 205951078Speter} 206051078Speter 206151078Speterstatic void 206251078Spetersiopoll() 206351078Speter{ 206451078Speter int unit; 206551078Speter 206651078Speter if (com_events == 0) 206751078Speter return; 206851078Speterrepeat: 206953344Speter for (unit = 0; unit < sio_numunits; ++unit) { 207051078Speter struct com_s *com; 207151078Speter int incc; 207251078Speter struct tty *tp; 207351078Speter 207451078Speter com = com_addr(unit); 207551078Speter if (com == NULL) 207651078Speter continue; 207751078Speter tp = com->tp; 207851078Speter if (tp == NULL || com->gone) { 207951078Speter /* 208051078Speter * Discard any events related to never-opened or 208151078Speter * going-away devices. 208251078Speter */ 208351078Speter disable_intr(); 208451078Speter incc = com->iptr - com->ibuf; 208551078Speter com->iptr = com->ibuf; 208651078Speter if (com->state & CS_CHECKMSR) { 208751078Speter incc += LOTS_OF_EVENTS; 208851078Speter com->state &= ~CS_CHECKMSR; 208951078Speter } 209051078Speter com_events -= incc; 209151078Speter enable_intr(); 209251078Speter continue; 209351078Speter } 209451078Speter if (com->iptr != com->ibuf) { 209551078Speter disable_intr(); 209651078Speter sioinput(com); 209751078Speter enable_intr(); 209851078Speter } 209951078Speter if (com->state & CS_CHECKMSR) { 210051078Speter u_char delta_modem_status; 210151078Speter 210251078Speter disable_intr(); 210351078Speter delta_modem_status = com->last_modem_status 210451078Speter ^ com->prev_modem_status; 210551078Speter com->prev_modem_status = com->last_modem_status; 210651078Speter com_events -= LOTS_OF_EVENTS; 210751078Speter com->state &= ~CS_CHECKMSR; 210851078Speter enable_intr(); 210951078Speter if (delta_modem_status & MSR_DCD) 211051078Speter (*linesw[tp->t_line].l_modem) 211151078Speter (tp, com->prev_modem_status & MSR_DCD); 211251078Speter } 211351078Speter if (com->state & CS_ODONE) { 211451078Speter disable_intr(); 211551078Speter com_events -= LOTS_OF_EVENTS; 211651078Speter com->state &= ~CS_ODONE; 211751078Speter enable_intr(); 211851078Speter if (!(com->state & CS_BUSY) 211951078Speter && !(com->extra_state & CSE_BUSYCHECK)) { 212051078Speter timeout(siobusycheck, com, hz / 100); 212151078Speter com->extra_state |= CSE_BUSYCHECK; 212251078Speter } 212351078Speter (*linesw[tp->t_line].l_start)(tp); 212451078Speter } 212551078Speter if (com_events == 0) 212651078Speter break; 212751078Speter } 212851078Speter if (com_events >= LOTS_OF_EVENTS) 212951078Speter goto repeat; 213051078Speter} 213151078Speter 213251078Speterstatic int 213351078Spetercomparam(tp, t) 213451078Speter struct tty *tp; 213551078Speter struct termios *t; 213651078Speter{ 213751078Speter u_int cfcr; 213851078Speter int cflag; 213951078Speter struct com_s *com; 214051078Speter int divisor; 214151078Speter u_char dlbh; 214251078Speter u_char dlbl; 214351078Speter Port_t iobase; 214451078Speter int s; 214551078Speter int unit; 214651078Speter 214751078Speter /* do historical conversions */ 214851078Speter if (t->c_ispeed == 0) 214951078Speter t->c_ispeed = t->c_ospeed; 215051078Speter 215151078Speter /* check requested parameters */ 215251078Speter divisor = ttspeedtab(t->c_ospeed, comspeedtab); 215351078Speter if (divisor < 0 || (divisor > 0 && t->c_ispeed != t->c_ospeed)) 215451078Speter return (EINVAL); 215551078Speter 215651078Speter /* parameters are OK, convert them to the com struct and the device */ 215751078Speter unit = DEV_TO_UNIT(tp->t_dev); 215851078Speter com = com_addr(unit); 215951078Speter iobase = com->iobase; 216051078Speter s = spltty(); 216151078Speter if (divisor == 0) 216251078Speter (void)commctl(com, TIOCM_DTR, DMBIC); /* hang up line */ 216351078Speter else 216451078Speter (void)commctl(com, TIOCM_DTR, DMBIS); 216551078Speter cflag = t->c_cflag; 216651078Speter switch (cflag & CSIZE) { 216751078Speter case CS5: 216851078Speter cfcr = CFCR_5BITS; 216951078Speter break; 217051078Speter case CS6: 217151078Speter cfcr = CFCR_6BITS; 217251078Speter break; 217351078Speter case CS7: 217451078Speter cfcr = CFCR_7BITS; 217551078Speter break; 217651078Speter default: 217751078Speter cfcr = CFCR_8BITS; 217851078Speter break; 217951078Speter } 218051078Speter if (cflag & PARENB) { 218151078Speter cfcr |= CFCR_PENAB; 218251078Speter if (!(cflag & PARODD)) 218351078Speter cfcr |= CFCR_PEVEN; 218451078Speter } 218551078Speter if (cflag & CSTOPB) 218651078Speter cfcr |= CFCR_STOPB; 218751078Speter 218851078Speter if (com->hasfifo && divisor != 0) { 218951078Speter /* 219051078Speter * Use a fifo trigger level low enough so that the input 219151078Speter * latency from the fifo is less than about 16 msec and 219251078Speter * the total latency is less than about 30 msec. These 219351078Speter * latencies are reasonable for humans. Serial comms 219451078Speter * protocols shouldn't expect anything better since modem 219551078Speter * latencies are larger. 219651078Speter */ 219751078Speter com->fifo_image = t->c_ospeed <= 4800 219851078Speter ? FIFO_ENABLE : FIFO_ENABLE | FIFO_RX_HIGH; 219951078Speter#ifdef COM_ESP 220051078Speter /* 220151078Speter * The Hayes ESP card needs the fifo DMA mode bit set 220251078Speter * in compatibility mode. If not, it will interrupt 220351078Speter * for each character received. 220451078Speter */ 220551078Speter if (com->esp) 220651078Speter com->fifo_image |= FIFO_DMA_MODE; 220751078Speter#endif 220851078Speter outb(iobase + com_fifo, com->fifo_image); 220951078Speter } 221051078Speter 221151078Speter /* 221251078Speter * This returns with interrupts disabled so that we can complete 221351078Speter * the speed change atomically. Keeping interrupts disabled is 221451078Speter * especially important while com_data is hidden. 221551078Speter */ 221651078Speter (void) siosetwater(com, t->c_ispeed); 221751078Speter 221851078Speter if (divisor != 0) { 221951078Speter outb(iobase + com_cfcr, cfcr | CFCR_DLAB); 222051078Speter /* 222151078Speter * Only set the divisor registers if they would change, 222251078Speter * since on some 16550 incompatibles (UMC8669F), setting 222351078Speter * them while input is arriving them loses sync until 222451078Speter * data stops arriving. 222551078Speter */ 222651078Speter dlbl = divisor & 0xFF; 222751078Speter if (inb(iobase + com_dlbl) != dlbl) 222851078Speter outb(iobase + com_dlbl, dlbl); 222951078Speter dlbh = (u_int) divisor >> 8; 223051078Speter if (inb(iobase + com_dlbh) != dlbh) 223151078Speter outb(iobase + com_dlbh, dlbh); 223251078Speter } 223351078Speter 223451078Speter 223551078Speter outb(iobase + com_cfcr, com->cfcr_image = cfcr); 223651078Speter 223751078Speter if (!(tp->t_state & TS_TTSTOP)) 223851078Speter com->state |= CS_TTGO; 223951078Speter 224051078Speter if (cflag & CRTS_IFLOW) { 224151078Speter if (com->st16650a) { 224251078Speter outb(iobase + com_cfcr, 0xbf); 224351078Speter outb(iobase + com_fifo, inb(iobase + com_fifo) | 0x40); 224451078Speter } 224551078Speter com->state |= CS_RTS_IFLOW; 224651078Speter /* 224751078Speter * If CS_RTS_IFLOW just changed from off to on, the change 224851078Speter * needs to be propagated to MCR_RTS. This isn't urgent, 224951078Speter * so do it later by calling comstart() instead of repeating 225051078Speter * a lot of code from comstart() here. 225151078Speter */ 225251078Speter } else if (com->state & CS_RTS_IFLOW) { 225351078Speter com->state &= ~CS_RTS_IFLOW; 225451078Speter /* 225551078Speter * CS_RTS_IFLOW just changed from on to off. Force MCR_RTS 225651078Speter * on here, since comstart() won't do it later. 225751078Speter */ 225851078Speter outb(com->modem_ctl_port, com->mcr_image |= MCR_RTS); 225951078Speter if (com->st16650a) { 226051078Speter outb(iobase + com_cfcr, 0xbf); 226151078Speter outb(iobase + com_fifo, inb(iobase + com_fifo) & ~0x40); 226251078Speter } 226351078Speter } 226451078Speter 226551078Speter 226651078Speter /* 226751078Speter * Set up state to handle output flow control. 226851078Speter * XXX - worth handling MDMBUF (DCD) flow control at the lowest level? 226951078Speter * Now has 10+ msec latency, while CTS flow has 50- usec latency. 227051078Speter */ 227151078Speter com->state |= CS_ODEVREADY; 227251078Speter com->state &= ~CS_CTS_OFLOW; 227351078Speter if (cflag & CCTS_OFLOW) { 227451078Speter com->state |= CS_CTS_OFLOW; 227551078Speter if (!(com->last_modem_status & MSR_CTS)) 227651078Speter com->state &= ~CS_ODEVREADY; 227751078Speter if (com->st16650a) { 227851078Speter outb(iobase + com_cfcr, 0xbf); 227951078Speter outb(iobase + com_fifo, inb(iobase + com_fifo) | 0x80); 228051078Speter } 228151078Speter } else { 228251078Speter if (com->st16650a) { 228351078Speter outb(iobase + com_cfcr, 0xbf); 228451078Speter outb(iobase + com_fifo, inb(iobase + com_fifo) & ~0x80); 228551078Speter } 228651078Speter } 228751078Speter 228851078Speter 228951078Speter outb(iobase + com_cfcr, com->cfcr_image); 229051078Speter 229151078Speter 229251078Speter /* XXX shouldn't call functions while intrs are disabled. */ 229351078Speter disc_optim(tp, t, com); 229451078Speter /* 229551078Speter * Recover from fiddling with CS_TTGO. We used to call siointr1() 229651078Speter * unconditionally, but that defeated the careful discarding of 229751078Speter * stale input in sioopen(). 229851078Speter */ 229951078Speter if (com->state >= (CS_BUSY | CS_TTGO)) 230051078Speter siointr1(com); 230151078Speter 230251078Speter enable_intr(); 230351078Speter splx(s); 230451078Speter comstart(tp); 230551078Speter if (com->ibufold != NULL) { 230651078Speter free(com->ibufold, M_DEVBUF); 230751078Speter com->ibufold = NULL; 230851078Speter } 230951078Speter return (0); 231051078Speter} 231151078Speter 231251078Speterstatic int 231351078Spetersiosetwater(com, speed) 231451078Speter struct com_s *com; 231551078Speter speed_t speed; 231651078Speter{ 231751078Speter int cp4ticks; 231851078Speter u_char *ibuf; 231951078Speter int ibufsize; 232051078Speter struct tty *tp; 232151078Speter 232251078Speter /* 232351078Speter * Make the buffer size large enough to handle a softtty interrupt 232451078Speter * latency of about 2 ticks without loss of throughput or data 232551078Speter * (about 3 ticks if input flow control is not used or not honoured, 232651078Speter * but a bit less for CS5-CS7 modes). 232751078Speter */ 232851078Speter cp4ticks = speed / 10 / hz * 4; 232951078Speter for (ibufsize = 128; ibufsize < cp4ticks;) 233051078Speter ibufsize <<= 1; 233151078Speter if (ibufsize == com->ibufsize) { 233251078Speter disable_intr(); 233351078Speter return (0); 233451078Speter } 233551078Speter 233651078Speter /* 233751078Speter * Allocate input buffer. The extra factor of 2 in the size is 233851078Speter * to allow for an error byte for each input byte. 233951078Speter */ 234051078Speter ibuf = malloc(2 * ibufsize, M_DEVBUF, M_NOWAIT); 234151078Speter if (ibuf == NULL) { 234251078Speter disable_intr(); 234351078Speter return (ENOMEM); 234451078Speter } 234551078Speter 234651078Speter /* Initialize non-critical variables. */ 234751078Speter com->ibufold = com->ibuf; 234851078Speter com->ibufsize = ibufsize; 234951078Speter tp = com->tp; 235051078Speter if (tp != NULL) { 235151078Speter tp->t_ififosize = 2 * ibufsize; 235251078Speter tp->t_ispeedwat = (speed_t)-1; 235351078Speter tp->t_ospeedwat = (speed_t)-1; 235451078Speter } 235551078Speter 235651078Speter /* 235751078Speter * Read current input buffer, if any. Continue with interrupts 235851078Speter * disabled. 235951078Speter */ 236051078Speter disable_intr(); 236151078Speter if (com->iptr != com->ibuf) 236251078Speter sioinput(com); 236351078Speter 236451078Speter /*- 236551078Speter * Initialize critical variables, including input buffer watermarks. 236651078Speter * The external device is asked to stop sending when the buffer 236751078Speter * exactly reaches high water, or when the high level requests it. 236851078Speter * The high level is notified immediately (rather than at a later 236951078Speter * clock tick) when this watermark is reached. 237051078Speter * The buffer size is chosen so the watermark should almost never 237151078Speter * be reached. 237251078Speter * The low watermark is invisibly 0 since the buffer is always 237351078Speter * emptied all at once. 237451078Speter */ 237551078Speter com->iptr = com->ibuf = ibuf; 237651078Speter com->ibufend = ibuf + ibufsize; 237751078Speter com->ierroff = ibufsize; 237851078Speter com->ihighwater = ibuf + 3 * ibufsize / 4; 237951078Speter return (0); 238051078Speter} 238151078Speter 238251078Speterstatic void 238351078Spetercomstart(tp) 238451078Speter struct tty *tp; 238551078Speter{ 238651078Speter struct com_s *com; 238751078Speter int s; 238851078Speter int unit; 238951078Speter 239051078Speter unit = DEV_TO_UNIT(tp->t_dev); 239151078Speter com = com_addr(unit); 239251078Speter s = spltty(); 239351078Speter disable_intr(); 239451078Speter if (tp->t_state & TS_TTSTOP) 239551078Speter com->state &= ~CS_TTGO; 239651078Speter else 239751078Speter com->state |= CS_TTGO; 239851078Speter if (tp->t_state & TS_TBLOCK) { 239951078Speter if (com->mcr_image & MCR_RTS && com->state & CS_RTS_IFLOW) 240051078Speter outb(com->modem_ctl_port, com->mcr_image &= ~MCR_RTS); 240151078Speter } else { 240251078Speter if (!(com->mcr_image & MCR_RTS) && com->iptr < com->ihighwater 240351078Speter && com->state & CS_RTS_IFLOW) 240451078Speter outb(com->modem_ctl_port, com->mcr_image |= MCR_RTS); 240551078Speter } 240651078Speter enable_intr(); 240751078Speter if (tp->t_state & (TS_TIMEOUT | TS_TTSTOP)) { 240851078Speter ttwwakeup(tp); 240951078Speter splx(s); 241051078Speter return; 241151078Speter } 241251078Speter if (tp->t_outq.c_cc != 0) { 241351078Speter struct lbq *qp; 241451078Speter struct lbq *next; 241551078Speter 241651078Speter if (!com->obufs[0].l_queued) { 241751078Speter com->obufs[0].l_tail 241851078Speter = com->obuf1 + q_to_b(&tp->t_outq, com->obuf1, 241951078Speter sizeof com->obuf1); 242051078Speter com->obufs[0].l_next = NULL; 242151078Speter com->obufs[0].l_queued = TRUE; 242251078Speter disable_intr(); 242351078Speter if (com->state & CS_BUSY) { 242451078Speter qp = com->obufq.l_next; 242551078Speter while ((next = qp->l_next) != NULL) 242651078Speter qp = next; 242751078Speter qp->l_next = &com->obufs[0]; 242851078Speter } else { 242951078Speter com->obufq.l_head = com->obufs[0].l_head; 243051078Speter com->obufq.l_tail = com->obufs[0].l_tail; 243151078Speter com->obufq.l_next = &com->obufs[0]; 243251078Speter com->state |= CS_BUSY; 243351078Speter } 243451078Speter enable_intr(); 243551078Speter } 243651078Speter if (tp->t_outq.c_cc != 0 && !com->obufs[1].l_queued) { 243751078Speter com->obufs[1].l_tail 243851078Speter = com->obuf2 + q_to_b(&tp->t_outq, com->obuf2, 243951078Speter sizeof com->obuf2); 244051078Speter com->obufs[1].l_next = NULL; 244151078Speter com->obufs[1].l_queued = TRUE; 244251078Speter disable_intr(); 244351078Speter if (com->state & CS_BUSY) { 244451078Speter qp = com->obufq.l_next; 244551078Speter while ((next = qp->l_next) != NULL) 244651078Speter qp = next; 244751078Speter qp->l_next = &com->obufs[1]; 244851078Speter } else { 244951078Speter com->obufq.l_head = com->obufs[1].l_head; 245051078Speter com->obufq.l_tail = com->obufs[1].l_tail; 245151078Speter com->obufq.l_next = &com->obufs[1]; 245251078Speter com->state |= CS_BUSY; 245351078Speter } 245451078Speter enable_intr(); 245551078Speter } 245651078Speter tp->t_state |= TS_BUSY; 245751078Speter } 245851078Speter disable_intr(); 245951078Speter if (com->state >= (CS_BUSY | CS_TTGO)) 246051078Speter siointr1(com); /* fake interrupt to start output */ 246151078Speter enable_intr(); 246251078Speter ttwwakeup(tp); 246351078Speter splx(s); 246451078Speter} 246551078Speter 246651078Speterstatic void 246751654Sphkcomstop(tp, rw) 246851078Speter struct tty *tp; 246951078Speter int rw; 247051078Speter{ 247151078Speter struct com_s *com; 247251078Speter 247351078Speter com = com_addr(DEV_TO_UNIT(tp->t_dev)); 247451078Speter if (com->gone) 247551078Speter return; 247651078Speter disable_intr(); 247751078Speter if (rw & FWRITE) { 247851078Speter if (com->hasfifo) 247951078Speter#ifdef COM_ESP 248051078Speter /* XXX avoid h/w bug. */ 248151078Speter if (!com->esp) 248251078Speter#endif 248351078Speter outb(com->iobase + com_fifo, 248451078Speter FIFO_XMT_RST | com->fifo_image); 248551078Speter com->obufs[0].l_queued = FALSE; 248651078Speter com->obufs[1].l_queued = FALSE; 248751078Speter if (com->state & CS_ODONE) 248851078Speter com_events -= LOTS_OF_EVENTS; 248951078Speter com->state &= ~(CS_ODONE | CS_BUSY); 249051078Speter com->tp->t_state &= ~TS_BUSY; 249151078Speter } 249251078Speter if (rw & FREAD) { 249351078Speter if (com->hasfifo) 249451078Speter#ifdef COM_ESP 249551078Speter /* XXX avoid h/w bug. */ 249651078Speter if (!com->esp) 249751078Speter#endif 249851078Speter outb(com->iobase + com_fifo, 249951078Speter FIFO_RCV_RST | com->fifo_image); 250051078Speter com_events -= (com->iptr - com->ibuf); 250151078Speter com->iptr = com->ibuf; 250251078Speter } 250351078Speter enable_intr(); 250451078Speter comstart(tp); 250551078Speter} 250651078Speter 250751078Speterstatic int 250851078Spetercommctl(com, bits, how) 250951078Speter struct com_s *com; 251051078Speter int bits; 251151078Speter int how; 251251078Speter{ 251351078Speter int mcr; 251451078Speter int msr; 251551078Speter 251651078Speter if (how == DMGET) { 251751078Speter bits = TIOCM_LE; /* XXX - always enabled while open */ 251851078Speter mcr = com->mcr_image; 251951078Speter if (mcr & MCR_DTR) 252051078Speter bits |= TIOCM_DTR; 252151078Speter if (mcr & MCR_RTS) 252251078Speter bits |= TIOCM_RTS; 252351078Speter msr = com->prev_modem_status; 252451078Speter if (msr & MSR_CTS) 252551078Speter bits |= TIOCM_CTS; 252651078Speter if (msr & MSR_DCD) 252751078Speter bits |= TIOCM_CD; 252851078Speter if (msr & MSR_DSR) 252951078Speter bits |= TIOCM_DSR; 253051078Speter /* 253151078Speter * XXX - MSR_RI is naturally volatile, and we make MSR_TERI 253251078Speter * more volatile by reading the modem status a lot. Perhaps 253351078Speter * we should latch both bits until the status is read here. 253451078Speter */ 253551078Speter if (msr & (MSR_RI | MSR_TERI)) 253651078Speter bits |= TIOCM_RI; 253751078Speter return (bits); 253851078Speter } 253951078Speter mcr = 0; 254051078Speter if (bits & TIOCM_DTR) 254151078Speter mcr |= MCR_DTR; 254251078Speter if (bits & TIOCM_RTS) 254351078Speter mcr |= MCR_RTS; 254451078Speter if (com->gone) 254551078Speter return(0); 254651078Speter disable_intr(); 254751078Speter switch (how) { 254851078Speter case DMSET: 254951078Speter outb(com->modem_ctl_port, 255051078Speter com->mcr_image = mcr | (com->mcr_image & MCR_IENABLE)); 255151078Speter break; 255251078Speter case DMBIS: 255351078Speter outb(com->modem_ctl_port, com->mcr_image |= mcr); 255451078Speter break; 255551078Speter case DMBIC: 255651078Speter outb(com->modem_ctl_port, com->mcr_image &= ~mcr); 255751078Speter break; 255851078Speter } 255951078Speter enable_intr(); 256051078Speter return (0); 256151078Speter} 256251078Speter 256351078Speterstatic void 256451078Spetersiosettimeout() 256551078Speter{ 256651078Speter struct com_s *com; 256751078Speter bool_t someopen; 256851078Speter int unit; 256951078Speter 257051078Speter /* 257151078Speter * Set our timeout period to 1 second if no polled devices are open. 257251078Speter * Otherwise set it to max(1/200, 1/hz). 257351078Speter * Enable timeouts iff some device is open. 257451078Speter */ 257551078Speter untimeout(comwakeup, (void *)NULL, sio_timeout_handle); 257651078Speter sio_timeout = hz; 257751078Speter someopen = FALSE; 257853344Speter for (unit = 0; unit < sio_numunits; ++unit) { 257951078Speter com = com_addr(unit); 258051078Speter if (com != NULL && com->tp != NULL 258151078Speter && com->tp->t_state & TS_ISOPEN && !com->gone) { 258251078Speter someopen = TRUE; 258351078Speter if (com->poll || com->poll_output) { 258451078Speter sio_timeout = hz > 200 ? hz / 200 : 1; 258551078Speter break; 258651078Speter } 258751078Speter } 258851078Speter } 258951078Speter if (someopen) { 259051078Speter sio_timeouts_until_log = hz / sio_timeout; 259151078Speter sio_timeout_handle = timeout(comwakeup, (void *)NULL, 259251078Speter sio_timeout); 259351078Speter } else { 259451078Speter /* Flush error messages, if any. */ 259551078Speter sio_timeouts_until_log = 1; 259651078Speter comwakeup((void *)NULL); 259751078Speter untimeout(comwakeup, (void *)NULL, sio_timeout_handle); 259851078Speter } 259951078Speter} 260051078Speter 260151078Speterstatic void 260251078Spetercomwakeup(chan) 260351078Speter void *chan; 260451078Speter{ 260551078Speter struct com_s *com; 260651078Speter int unit; 260751078Speter 260851078Speter sio_timeout_handle = timeout(comwakeup, (void *)NULL, sio_timeout); 260951078Speter 261051078Speter /* 261151078Speter * Recover from lost output interrupts. 261251078Speter * Poll any lines that don't use interrupts. 261351078Speter */ 261453344Speter for (unit = 0; unit < sio_numunits; ++unit) { 261551078Speter com = com_addr(unit); 261651078Speter if (com != NULL && !com->gone 261751078Speter && (com->state >= (CS_BUSY | CS_TTGO) || com->poll)) { 261851078Speter disable_intr(); 261951078Speter siointr1(com); 262051078Speter enable_intr(); 262151078Speter } 262251078Speter } 262351078Speter 262451078Speter /* 262551078Speter * Check for and log errors, but not too often. 262651078Speter */ 262751078Speter if (--sio_timeouts_until_log > 0) 262851078Speter return; 262951078Speter sio_timeouts_until_log = hz / sio_timeout; 263053344Speter for (unit = 0; unit < sio_numunits; ++unit) { 263151078Speter int errnum; 263251078Speter 263351078Speter com = com_addr(unit); 263451078Speter if (com == NULL) 263551078Speter continue; 263651078Speter if (com->gone) 263751078Speter continue; 263851078Speter for (errnum = 0; errnum < CE_NTYPES; ++errnum) { 263951078Speter u_int delta; 264051078Speter u_long total; 264151078Speter 264251078Speter disable_intr(); 264351078Speter delta = com->delta_error_counts[errnum]; 264451078Speter com->delta_error_counts[errnum] = 0; 264551078Speter enable_intr(); 264651078Speter if (delta == 0) 264751078Speter continue; 264851078Speter total = com->error_counts[errnum] += delta; 264951078Speter log(LOG_ERR, "sio%d: %u more %s%s (total %lu)\n", 265051078Speter unit, delta, error_desc[errnum], 265151078Speter delta == 1 ? "" : "s", total); 265251078Speter } 265351078Speter } 265451078Speter} 265551078Speter 265651078Speterstatic void 265751078Speterdisc_optim(tp, t, com) 265851078Speter struct tty *tp; 265951078Speter struct termios *t; 266051078Speter struct com_s *com; 266151078Speter{ 266251078Speter if (!(t->c_iflag & (ICRNL | IGNCR | IMAXBEL | INLCR | ISTRIP | IXON)) 266351078Speter && (!(t->c_iflag & BRKINT) || (t->c_iflag & IGNBRK)) 266451078Speter && (!(t->c_iflag & PARMRK) 266551078Speter || (t->c_iflag & (IGNPAR | IGNBRK)) == (IGNPAR | IGNBRK)) 266651078Speter && !(t->c_lflag & (ECHO | ICANON | IEXTEN | ISIG | PENDIN)) 266751078Speter && linesw[tp->t_line].l_rint == ttyinput) 266851078Speter tp->t_state |= TS_CAN_BYPASS_L_RINT; 266951078Speter else 267051078Speter tp->t_state &= ~TS_CAN_BYPASS_L_RINT; 267151078Speter com->hotchar = linesw[tp->t_line].l_hotchar; 267251078Speter} 267351078Speter 267451078Speter/* 267551078Speter * Following are all routines needed for SIO to act as console 267651078Speter */ 267751078Speter#include <sys/cons.h> 267851078Speter 267951078Speterstruct siocnstate { 268051078Speter u_char dlbl; 268151078Speter u_char dlbh; 268251078Speter u_char ier; 268351078Speter u_char cfcr; 268451078Speter u_char mcr; 268551078Speter}; 268651078Speter 268751078Speterstatic speed_t siocngetspeed __P((Port_t, struct speedtab *)); 268851078Speterstatic void siocnclose __P((struct siocnstate *sp, Port_t iobase)); 268951078Speterstatic void siocnopen __P((struct siocnstate *sp, Port_t iobase, int speed)); 269051078Speterstatic void siocntxwait __P((Port_t iobase)); 269151078Speter 269251078Speterstatic cn_probe_t siocnprobe; 269351078Speterstatic cn_init_t siocninit; 269451078Speterstatic cn_checkc_t siocncheckc; 269551078Speterstatic cn_getc_t siocngetc; 269651078Speterstatic cn_putc_t siocnputc; 269751078Speter 269851078Speter#ifdef __i386__ 269955823SyokotaCONS_DRIVER(sio, siocnprobe, siocninit, NULL, siocngetc, siocncheckc, 270055823Syokota siocnputc, NULL); 270151078Speter#endif 270251078Speter 270351078Speter/* To get the GDB related variables */ 270451078Speter#if DDB > 0 270551078Speter#include <ddb/ddb.h> 270651078Speter#endif 270751078Speter 270851078Speterstatic void 270951078Spetersiocntxwait(iobase) 271051078Speter Port_t iobase; 271151078Speter{ 271251078Speter int timo; 271351078Speter 271451078Speter /* 271551078Speter * Wait for any pending transmission to finish. Required to avoid 271651078Speter * the UART lockup bug when the speed is changed, and for normal 271751078Speter * transmits. 271851078Speter */ 271951078Speter timo = 100000; 272051078Speter while ((inb(iobase + com_lsr) & (LSR_TSRE | LSR_TXRDY)) 272151078Speter != (LSR_TSRE | LSR_TXRDY) && --timo != 0) 272251078Speter ; 272351078Speter} 272451078Speter 272551078Speter/* 272651078Speter * Read the serial port specified and try to figure out what speed 272751078Speter * it's currently running at. We're assuming the serial port has 272851078Speter * been initialized and is basicly idle. This routine is only intended 272951078Speter * to be run at system startup. 273051078Speter * 273151078Speter * If the value read from the serial port doesn't make sense, return 0. 273251078Speter */ 273351078Speter 273451078Speterstatic speed_t 273551078Spetersiocngetspeed(iobase, table) 273651078Speter Port_t iobase; 273751078Speter struct speedtab *table; 273851078Speter{ 273951078Speter int code; 274051078Speter u_char dlbh; 274151078Speter u_char dlbl; 274251078Speter u_char cfcr; 274351078Speter 274451078Speter cfcr = inb(iobase + com_cfcr); 274551078Speter outb(iobase + com_cfcr, CFCR_DLAB | cfcr); 274651078Speter 274751078Speter dlbl = inb(iobase + com_dlbl); 274851078Speter dlbh = inb(iobase + com_dlbh); 274951078Speter 275051078Speter outb(iobase + com_cfcr, cfcr); 275151078Speter 275251078Speter code = dlbh << 8 | dlbl; 275351078Speter 275453344Speter for (; table->sp_speed != -1; table++) 275551078Speter if (table->sp_code == code) 275651078Speter return (table->sp_speed); 275751078Speter 275851078Speter return 0; /* didn't match anything sane */ 275951078Speter} 276051078Speter 276151078Speterstatic void 276251078Spetersiocnopen(sp, iobase, speed) 276351078Speter struct siocnstate *sp; 276451078Speter Port_t iobase; 276551078Speter int speed; 276651078Speter{ 276751078Speter int divisor; 276851078Speter u_char dlbh; 276951078Speter u_char dlbl; 277051078Speter 277151078Speter /* 277251078Speter * Save all the device control registers except the fifo register 277351078Speter * and set our default ones (cs8 -parenb speed=comdefaultrate). 277451078Speter * We can't save the fifo register since it is read-only. 277551078Speter */ 277651078Speter sp->ier = inb(iobase + com_ier); 277751078Speter outb(iobase + com_ier, 0); /* spltty() doesn't stop siointr() */ 277851078Speter siocntxwait(iobase); 277951078Speter sp->cfcr = inb(iobase + com_cfcr); 278051078Speter outb(iobase + com_cfcr, CFCR_DLAB | CFCR_8BITS); 278151078Speter sp->dlbl = inb(iobase + com_dlbl); 278251078Speter sp->dlbh = inb(iobase + com_dlbh); 278351078Speter /* 278451078Speter * Only set the divisor registers if they would change, since on 278551078Speter * some 16550 incompatibles (Startech), setting them clears the 278651078Speter * data input register. This also reduces the effects of the 278751078Speter * UMC8669F bug. 278851078Speter */ 278951078Speter divisor = ttspeedtab(speed, comspeedtab); 279051078Speter dlbl = divisor & 0xFF; 279151078Speter if (sp->dlbl != dlbl) 279251078Speter outb(iobase + com_dlbl, dlbl); 279351078Speter dlbh = (u_int) divisor >> 8; 279451078Speter if (sp->dlbh != dlbh) 279551078Speter outb(iobase + com_dlbh, dlbh); 279651078Speter outb(iobase + com_cfcr, CFCR_8BITS); 279751078Speter sp->mcr = inb(iobase + com_mcr); 279851078Speter /* 279951078Speter * We don't want interrupts, but must be careful not to "disable" 280051078Speter * them by clearing the MCR_IENABLE bit, since that might cause 280151078Speter * an interrupt by floating the IRQ line. 280251078Speter */ 280351078Speter outb(iobase + com_mcr, (sp->mcr & MCR_IENABLE) | MCR_DTR | MCR_RTS); 280451078Speter} 280551078Speter 280651078Speterstatic void 280751078Spetersiocnclose(sp, iobase) 280851078Speter struct siocnstate *sp; 280951078Speter Port_t iobase; 281051078Speter{ 281151078Speter /* 281251078Speter * Restore the device control registers. 281351078Speter */ 281451078Speter siocntxwait(iobase); 281551078Speter outb(iobase + com_cfcr, CFCR_DLAB | CFCR_8BITS); 281651078Speter if (sp->dlbl != inb(iobase + com_dlbl)) 281751078Speter outb(iobase + com_dlbl, sp->dlbl); 281851078Speter if (sp->dlbh != inb(iobase + com_dlbh)) 281951078Speter outb(iobase + com_dlbh, sp->dlbh); 282051078Speter outb(iobase + com_cfcr, sp->cfcr); 282151078Speter /* 282251078Speter * XXX damp oscillations of MCR_DTR and MCR_RTS by not restoring them. 282351078Speter */ 282451078Speter outb(iobase + com_mcr, sp->mcr | MCR_DTR | MCR_RTS); 282551078Speter outb(iobase + com_ier, sp->ier); 282651078Speter} 282751078Speter 282851078Speterstatic void 282951078Spetersiocnprobe(cp) 283051078Speter struct consdev *cp; 283151078Speter{ 283251078Speter speed_t boot_speed; 283351078Speter u_char cfcr; 283451078Speter int s, unit; 283551078Speter struct siocnstate sp; 283651078Speter 283751078Speter /* 283851078Speter * Find our first enabled console, if any. If it is a high-level 283951078Speter * console device, then initialize it and return successfully. 284051078Speter * If it is a low-level console device, then initialize it and 284151078Speter * return unsuccessfully. It must be initialized in both cases 284251078Speter * for early use by console drivers and debuggers. Initializing 284351078Speter * the hardware is not necessary in all cases, since the i/o 284451078Speter * routines initialize it on the fly, but it is necessary if 284551078Speter * input might arrive while the hardware is switched back to an 284651078Speter * uninitialized state. We can't handle multiple console devices 284751078Speter * yet because our low-level routines don't take a device arg. 284851078Speter * We trust the user to set the console flags properly so that we 284951078Speter * don't need to probe. 285051078Speter */ 285151078Speter cp->cn_pri = CN_DEAD; 285251078Speter 285351078Speter for (unit = 0; unit < 16; unit++) { /* XXX need to know how many */ 285451078Speter int flags; 285551078Speter int disabled; 285651078Speter if (resource_int_value("sio", unit, "disabled", &disabled) == 0) { 285751078Speter if (disabled) 285851078Speter continue; 285951078Speter } 286051078Speter if (resource_int_value("sio", unit, "flags", &flags)) 286151078Speter continue; 286251078Speter if (COM_CONSOLE(flags) || COM_DEBUGGER(flags)) { 286351078Speter int port; 286451078Speter Port_t iobase; 286551078Speter 286651078Speter if (resource_int_value("sio", unit, "port", &port)) 286751078Speter continue; 286851078Speter iobase = port; 286951078Speter s = spltty(); 287051078Speter if (boothowto & RB_SERIAL) { 287151078Speter boot_speed = siocngetspeed(iobase, comspeedtab); 287251078Speter if (boot_speed) 287351078Speter comdefaultrate = boot_speed; 287451078Speter } 287551078Speter 287651078Speter /* 287751078Speter * Initialize the divisor latch. We can't rely on 287851078Speter * siocnopen() to do this the first time, since it 287951078Speter * avoids writing to the latch if the latch appears 288051078Speter * to have the correct value. Also, if we didn't 288151078Speter * just read the speed from the hardware, then we 288251078Speter * need to set the speed in hardware so that 288351078Speter * switching it later is null. 288451078Speter */ 288551078Speter cfcr = inb(iobase + com_cfcr); 288651078Speter outb(iobase + com_cfcr, CFCR_DLAB | cfcr); 288751078Speter outb(iobase + com_dlbl, 288851078Speter COMBRD(comdefaultrate) & 0xff); 288951078Speter outb(iobase + com_dlbh, 289051078Speter (u_int) COMBRD(comdefaultrate) >> 8); 289151078Speter outb(iobase + com_cfcr, cfcr); 289251078Speter 289351078Speter siocnopen(&sp, iobase, comdefaultrate); 289451078Speter 289551078Speter splx(s); 289651078Speter if (COM_CONSOLE(flags) && !COM_LLCONSOLE(flags)) { 289751078Speter cp->cn_dev = makedev(CDEV_MAJOR, unit); 289851078Speter cp->cn_pri = COM_FORCECONSOLE(flags) 289951078Speter || boothowto & RB_SERIAL 290051078Speter ? CN_REMOTE : CN_NORMAL; 290151078Speter siocniobase = iobase; 290251078Speter siocnunit = unit; 290351078Speter } 290451078Speter if (COM_DEBUGGER(flags)) { 290551078Speter printf("sio%d: gdb debugging port\n", unit); 290651078Speter siogdbiobase = iobase; 290751078Speter siogdbunit = unit; 290851078Speter#if DDB > 0 290951078Speter gdbdev = makedev(CDEV_MAJOR, unit); 291051078Speter gdb_getc = siocngetc; 291151078Speter gdb_putc = siocnputc; 291251078Speter#endif 291351078Speter } 291451078Speter } 291551078Speter } 291651078Speter#ifdef __i386__ 291751078Speter#if DDB > 0 291851078Speter /* 291951078Speter * XXX Ugly Compatability. 292051078Speter * If no gdb port has been specified, set it to be the console 292151078Speter * as some configuration files don't specify the gdb port. 292251078Speter */ 292351078Speter if (gdbdev == NODEV && (boothowto & RB_GDB)) { 292451078Speter printf("Warning: no GDB port specified. Defaulting to sio%d.\n", 292551078Speter siocnunit); 292651078Speter printf("Set flag 0x80 on desired GDB port in your\n"); 292751078Speter printf("configuration file (currently sio only).\n"); 292851078Speter siogdbiobase = siocniobase; 292951078Speter siogdbunit = siocnunit; 293051078Speter gdbdev = makedev(CDEV_MAJOR, siocnunit); 293151078Speter gdb_getc = siocngetc; 293251078Speter gdb_putc = siocnputc; 293351078Speter } 293451078Speter#endif 293551078Speter#endif 293651078Speter} 293751078Speter 293851078Speter#ifdef __alpha__ 293951078Speter 294055868SgallatinCONS_DRIVER(sio, NULL, NULL, NULL, siocngetc, siocncheckc, siocnputc, NULL); 294151078Speter 294251078Speterint 294351078Spetersiocnattach(port, speed) 294451078Speter int port; 294551078Speter int speed; 294651078Speter{ 294751078Speter int s; 294851078Speter u_char cfcr; 294951078Speter struct siocnstate sp; 295051078Speter 295151078Speter siocniobase = port; 295251078Speter comdefaultrate = speed; 295351078Speter sio_consdev.cn_pri = CN_NORMAL; 295451078Speter sio_consdev.cn_dev = makedev(CDEV_MAJOR, 0); 295551078Speter 295651078Speter s = spltty(); 295751078Speter 295851078Speter /* 295951078Speter * Initialize the divisor latch. We can't rely on 296051078Speter * siocnopen() to do this the first time, since it 296151078Speter * avoids writing to the latch if the latch appears 296251078Speter * to have the correct value. Also, if we didn't 296351078Speter * just read the speed from the hardware, then we 296451078Speter * need to set the speed in hardware so that 296551078Speter * switching it later is null. 296651078Speter */ 296751078Speter cfcr = inb(siocniobase + com_cfcr); 296851078Speter outb(siocniobase + com_cfcr, CFCR_DLAB | cfcr); 296951078Speter outb(siocniobase + com_dlbl, 297051078Speter COMBRD(comdefaultrate) & 0xff); 297151078Speter outb(siocniobase + com_dlbh, 297251078Speter (u_int) COMBRD(comdefaultrate) >> 8); 297351078Speter outb(siocniobase + com_cfcr, cfcr); 297451078Speter 297551078Speter siocnopen(&sp, siocniobase, comdefaultrate); 297651078Speter splx(s); 297751078Speter 297851078Speter cn_tab = &sio_consdev; 297951078Speter return 0; 298051078Speter} 298151078Speter 298251078Speterint 298351078Spetersiogdbattach(port, speed) 298451078Speter int port; 298551078Speter int speed; 298651078Speter{ 298751078Speter int s; 298851078Speter u_char cfcr; 298951078Speter struct siocnstate sp; 299051078Speter 299151078Speter siogdbiobase = port; 299251078Speter gdbdefaultrate = speed; 299351078Speter 299451078Speter s = spltty(); 299551078Speter 299651078Speter /* 299751078Speter * Initialize the divisor latch. We can't rely on 299851078Speter * siocnopen() to do this the first time, since it 299951078Speter * avoids writing to the latch if the latch appears 300051078Speter * to have the correct value. Also, if we didn't 300151078Speter * just read the speed from the hardware, then we 300251078Speter * need to set the speed in hardware so that 300351078Speter * switching it later is null. 300451078Speter */ 300551078Speter cfcr = inb(siogdbiobase + com_cfcr); 300651078Speter outb(siogdbiobase + com_cfcr, CFCR_DLAB | cfcr); 300751078Speter outb(siogdbiobase + com_dlbl, 300851078Speter COMBRD(gdbdefaultrate) & 0xff); 300951078Speter outb(siogdbiobase + com_dlbh, 301051078Speter (u_int) COMBRD(gdbdefaultrate) >> 8); 301151078Speter outb(siogdbiobase + com_cfcr, cfcr); 301251078Speter 301351078Speter siocnopen(&sp, siogdbiobase, gdbdefaultrate); 301451078Speter splx(s); 301551078Speter 301651078Speter return 0; 301751078Speter} 301851078Speter 301951078Speter#endif 302051078Speter 302151078Speterstatic void 302251078Spetersiocninit(cp) 302351078Speter struct consdev *cp; 302451078Speter{ 302551078Speter comconsole = DEV_TO_UNIT(cp->cn_dev); 302651078Speter} 302751078Speter 302851078Speterstatic int 302951078Spetersiocncheckc(dev) 303051078Speter dev_t dev; 303151078Speter{ 303251078Speter int c; 303351078Speter Port_t iobase; 303451078Speter int s; 303551078Speter struct siocnstate sp; 303651078Speter 303751078Speter if (minor(dev) == siogdbunit) 303851078Speter iobase = siogdbiobase; 303951078Speter else 304051078Speter iobase = siocniobase; 304151078Speter s = spltty(); 304251078Speter siocnopen(&sp, iobase, comdefaultrate); 304351078Speter if (inb(iobase + com_lsr) & LSR_RXRDY) 304451078Speter c = inb(iobase + com_data); 304551078Speter else 304651078Speter c = -1; 304751078Speter siocnclose(&sp, iobase); 304851078Speter splx(s); 304951078Speter return (c); 305051078Speter} 305151078Speter 305251078Speter 305351078Speterint 305451078Spetersiocngetc(dev) 305551078Speter dev_t dev; 305651078Speter{ 305751078Speter int c; 305851078Speter Port_t iobase; 305951078Speter int s; 306051078Speter struct siocnstate sp; 306151078Speter 306251078Speter if (minor(dev) == siogdbunit) 306351078Speter iobase = siogdbiobase; 306451078Speter else 306551078Speter iobase = siocniobase; 306651078Speter s = spltty(); 306751078Speter siocnopen(&sp, iobase, comdefaultrate); 306851078Speter while (!(inb(iobase + com_lsr) & LSR_RXRDY)) 306951078Speter ; 307051078Speter c = inb(iobase + com_data); 307151078Speter siocnclose(&sp, iobase); 307251078Speter splx(s); 307351078Speter return (c); 307451078Speter} 307551078Speter 307651078Spetervoid 307751078Spetersiocnputc(dev, c) 307851078Speter dev_t dev; 307951078Speter int c; 308051078Speter{ 308151078Speter int s; 308251078Speter struct siocnstate sp; 308351078Speter Port_t iobase; 308451078Speter 308551078Speter if (minor(dev) == siogdbunit) 308651078Speter iobase = siogdbiobase; 308751078Speter else 308851078Speter iobase = siocniobase; 308951078Speter s = spltty(); 309051078Speter siocnopen(&sp, iobase, comdefaultrate); 309151078Speter siocntxwait(iobase); 309251078Speter outb(iobase + com_data, c); 309351078Speter siocnclose(&sp, iobase); 309451078Speter splx(s); 309551078Speter} 309651078Speter 309751078Speter#ifdef __alpha__ 309851078Speterint 309951078Spetersiogdbgetc() 310051078Speter{ 310151078Speter int c; 310251078Speter Port_t iobase; 310351078Speter int s; 310451078Speter struct siocnstate sp; 310551078Speter 310651078Speter iobase = siogdbiobase; 310751078Speter s = spltty(); 310851078Speter siocnopen(&sp, iobase, gdbdefaultrate); 310951078Speter while (!(inb(iobase + com_lsr) & LSR_RXRDY)) 311051078Speter ; 311151078Speter c = inb(iobase + com_data); 311251078Speter siocnclose(&sp, iobase); 311351078Speter splx(s); 311451078Speter return (c); 311551078Speter} 311651078Speter 311751078Spetervoid 311851078Spetersiogdbputc(c) 311951078Speter int c; 312051078Speter{ 312151078Speter int s; 312251078Speter struct siocnstate sp; 312351078Speter 312451078Speter s = spltty(); 312551078Speter siocnopen(&sp, siogdbiobase, gdbdefaultrate); 312651078Speter siocntxwait(siogdbiobase); 312751078Speter outb(siogdbiobase + com_data, c); 312851078Speter siocnclose(&sp, siogdbiobase); 312951078Speter splx(s); 313051078Speter} 313151078Speter#endif 313251078Speter 313352471SimpDRIVER_MODULE(sio, isa, sio_isa_driver, sio_devclass, 0, 0); 313452471Simp#if NCARD > 0 313552471SimpDRIVER_MODULE(sio, pccard, sio_pccard_driver, sio_devclass, 0, 0); 313652471Simp#endif 3137