sio.c revision 51918
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 51918 1999-10-03 22:25:19Z deischen $ 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" 4251078Speter#include "sio.h" 4351078Speter 4451078Speter/* 4551078Speter * Serial driver, based on 386BSD-0.1 com driver. 4651078Speter * Mostly rewritten to use pseudo-DMA. 4751078Speter * Works for National Semiconductor NS8250-NS16550AF UARTs. 4851078Speter * COM driver, based on HP dca driver. 4951078Speter * 5051078Speter * Changes for PC-Card integration: 5151078Speter * - Added PC-Card driver table and handlers 5251078Speter */ 5351078Speter#include <sys/param.h> 5451078Speter#include <sys/systm.h> 5551078Speter#include <sys/reboot.h> 5651078Speter#include <sys/malloc.h> 5751078Speter#include <sys/tty.h> 5851078Speter#include <sys/proc.h> 5951078Speter#include <sys/module.h> 6051078Speter#include <sys/conf.h> 6151078Speter#include <sys/dkstat.h> 6251078Speter#include <sys/fcntl.h> 6351078Speter#include <sys/interrupt.h> 6451078Speter#include <sys/kernel.h> 6551078Speter#include <sys/syslog.h> 6651078Speter#include <sys/sysctl.h> 6751078Speter#include <sys/bus.h> 6851078Speter#include <machine/bus.h> 6951078Speter#include <sys/rman.h> 7051078Speter#include <sys/timepps.h> 7151078Speter 7251078Speter#include <isa/isareg.h> 7351078Speter#include <isa/isavar.h> 7451078Speter#include <machine/lock.h> 7551078Speter 7651078Speter#include <machine/clock.h> 7751078Speter#include <machine/ipl.h> 7851078Speter#ifndef SMP 7951078Speter#include <machine/lock.h> 8051078Speter#endif 8151078Speter#include <machine/resource.h> 8251078Speter 8351078Speter#include <isa/sioreg.h> 8451078Speter 8551078Speter#ifdef COM_ESP 8651078Speter#include <isa/ic/esp.h> 8751078Speter#endif 8851078Speter#include <isa/ic/ns16550.h> 8951078Speter 9051078Speter#if 0 9151078Speter#include "card.h" 9251078Speter#if NCARD > 0 9351078Speter#include <sys/module.h> 9451078Speter#include <pccard/cardinfo.h> 9551078Speter#include <pccard/slot.h> 9651078Speter#endif 9751078Speter#else 9851078Speter#define NCARD 0 9951078Speter#endif 10051078Speter 10151078Speter#ifndef __i386__ 10251078Speter#define disable_intr() 10351078Speter#define enable_intr() 10451078Speter#endif 10551078Speter 10651078Speter#ifdef SMP 10751078Speter#define disable_intr() COM_DISABLE_INTR() 10851078Speter#define enable_intr() COM_ENABLE_INTR() 10951078Speter#endif /* SMP */ 11051078Speter 11151078Speter#ifndef EXTRA_SIO 11251078Speter#define EXTRA_SIO 4 /* XXX shouldn't need NSIO */ 11351078Speter#endif 11451078Speter 11551078Speter#define NSIOTOT (NSIO + EXTRA_SIO) 11651078Speter 11751078Speter#define LOTS_OF_EVENTS 64 /* helps separate urgent events from input */ 11851078Speter 11951078Speter#define CALLOUT_MASK 0x80 12051078Speter#define CONTROL_MASK 0x60 12151078Speter#define CONTROL_INIT_STATE 0x20 12251078Speter#define CONTROL_LOCK_STATE 0x40 12351078Speter#define DEV_TO_UNIT(dev) (MINOR_TO_UNIT(minor(dev))) 12451078Speter#define MINOR_MAGIC_MASK (CALLOUT_MASK | CONTROL_MASK) 12551078Speter#define MINOR_TO_UNIT(mynor) ((mynor) & ~MINOR_MAGIC_MASK) 12651078Speter 12751078Speter#ifdef COM_MULTIPORT 12851078Speter/* checks in flags for multiport and which is multiport "master chip" 12951078Speter * for a given card 13051078Speter */ 13151078Speter#define COM_ISMULTIPORT(flags) ((flags) & 0x01) 13251078Speter#define COM_MPMASTER(flags) (((flags) >> 8) & 0x0ff) 13351078Speter#define COM_NOTAST4(flags) ((flags) & 0x04) 13451078Speter#endif /* COM_MULTIPORT */ 13551078Speter 13651078Speter#define COM_CONSOLE(flags) ((flags) & 0x10) 13751078Speter#define COM_FORCECONSOLE(flags) ((flags) & 0x20) 13851078Speter#define COM_LLCONSOLE(flags) ((flags) & 0x40) 13951078Speter#define COM_DEBUGGER(flags) ((flags) & 0x80) 14051078Speter#define COM_LOSESOUTINTS(flags) ((flags) & 0x08) 14151078Speter#define COM_NOFIFO(flags) ((flags) & 0x02) 14251078Speter#define COM_ST16650A(flags) ((flags) & 0x20000) 14351078Speter#define COM_C_NOPROBE (0x40000) 14451078Speter#define COM_NOPROBE(flags) ((flags) & COM_C_NOPROBE) 14551078Speter#define COM_C_IIR_TXRDYBUG (0x80000) 14651078Speter#define COM_IIR_TXRDYBUG(flags) ((flags) & COM_C_IIR_TXRDYBUG) 14751078Speter#define COM_FIFOSIZE(flags) (((flags) & 0xff000000) >> 24) 14851078Speter 14951078Speter#define com_scr 7 /* scratch register for 16450-16550 (R/W) */ 15051078Speter 15151078Speter/* 15251078Speter * com state bits. 15351078Speter * (CS_BUSY | CS_TTGO) and (CS_BUSY | CS_TTGO | CS_ODEVREADY) must be higher 15451078Speter * than the other bits so that they can be tested as a group without masking 15551078Speter * off the low bits. 15651078Speter * 15751078Speter * The following com and tty flags correspond closely: 15851078Speter * CS_BUSY = TS_BUSY (maintained by comstart(), siopoll() and 15951078Speter * siostop()) 16051078Speter * CS_TTGO = ~TS_TTSTOP (maintained by comparam() and comstart()) 16151078Speter * CS_CTS_OFLOW = CCTS_OFLOW (maintained by comparam()) 16251078Speter * CS_RTS_IFLOW = CRTS_IFLOW (maintained by comparam()) 16351078Speter * TS_FLUSH is not used. 16451078Speter * XXX I think TIOCSETA doesn't clear TS_TTSTOP when it clears IXON. 16551078Speter * XXX CS_*FLOW should be CF_*FLOW in com->flags (control flags not state). 16651078Speter */ 16751078Speter#define CS_BUSY 0x80 /* output in progress */ 16851078Speter#define CS_TTGO 0x40 /* output not stopped by XOFF */ 16951078Speter#define CS_ODEVREADY 0x20 /* external device h/w ready (CTS) */ 17051078Speter#define CS_CHECKMSR 1 /* check of MSR scheduled */ 17151078Speter#define CS_CTS_OFLOW 2 /* use CTS output flow control */ 17251078Speter#define CS_DTR_OFF 0x10 /* DTR held off */ 17351078Speter#define CS_ODONE 4 /* output completed */ 17451078Speter#define CS_RTS_IFLOW 8 /* use RTS input flow control */ 17551078Speter#define CSE_BUSYCHECK 1 /* siobusycheck() scheduled */ 17651078Speter 17751078Speterstatic char const * const error_desc[] = { 17851078Speter#define CE_OVERRUN 0 17951078Speter "silo overflow", 18051078Speter#define CE_INTERRUPT_BUF_OVERFLOW 1 18151078Speter "interrupt-level buffer overflow", 18251078Speter#define CE_TTY_BUF_OVERFLOW 2 18351078Speter "tty-level buffer overflow", 18451078Speter}; 18551078Speter 18651078Speter#define CE_NTYPES 3 18751078Speter#define CE_RECORD(com, errnum) (++(com)->delta_error_counts[errnum]) 18851078Speter 18951078Speter/* types. XXX - should be elsewhere */ 19051078Spetertypedef u_int Port_t; /* hardware port */ 19151078Spetertypedef u_char bool_t; /* boolean */ 19251078Speter 19351078Speter/* queue of linear buffers */ 19451078Speterstruct lbq { 19551078Speter u_char *l_head; /* next char to process */ 19651078Speter u_char *l_tail; /* one past the last char to process */ 19751078Speter struct lbq *l_next; /* next in queue */ 19851078Speter bool_t l_queued; /* nonzero if queued */ 19951078Speter}; 20051078Speter 20151078Speter/* com device structure */ 20251078Speterstruct com_s { 20351078Speter u_int flags; /* Copy isa device flags */ 20451078Speter u_char state; /* miscellaneous flag bits */ 20551078Speter bool_t active_out; /* nonzero if the callout device is open */ 20651078Speter u_char cfcr_image; /* copy of value written to CFCR */ 20751078Speter#ifdef COM_ESP 20851078Speter bool_t esp; /* is this unit a hayes esp board? */ 20951078Speter#endif 21051078Speter u_char extra_state; /* more flag bits, separate for order trick */ 21151078Speter u_char fifo_image; /* copy of value written to FIFO */ 21251078Speter bool_t hasfifo; /* nonzero for 16550 UARTs */ 21351078Speter bool_t st16650a; /* Is a Startech 16650A or RTS/CTS compat */ 21451078Speter bool_t loses_outints; /* nonzero if device loses output interrupts */ 21551078Speter u_char mcr_image; /* copy of value written to MCR */ 21651078Speter#ifdef COM_MULTIPORT 21751078Speter bool_t multiport; /* is this unit part of a multiport device? */ 21851078Speter#endif /* COM_MULTIPORT */ 21951078Speter bool_t no_irq; /* nonzero if irq is not attached */ 22051078Speter bool_t gone; /* hardware disappeared */ 22151078Speter bool_t poll; /* nonzero if polling is required */ 22251078Speter bool_t poll_output; /* nonzero if polling for output is required */ 22351078Speter int unit; /* unit number */ 22451078Speter int dtr_wait; /* time to hold DTR down on close (* 1/hz) */ 22551078Speter u_int tx_fifo_size; 22651078Speter u_int wopeners; /* # processes waiting for DCD in open() */ 22751078Speter 22851078Speter /* 22951078Speter * The high level of the driver never reads status registers directly 23051078Speter * because there would be too many side effects to handle conveniently. 23151078Speter * Instead, it reads copies of the registers stored here by the 23251078Speter * interrupt handler. 23351078Speter */ 23451078Speter u_char last_modem_status; /* last MSR read by intr handler */ 23551078Speter u_char prev_modem_status; /* last MSR handled by high level */ 23651078Speter 23751078Speter u_char hotchar; /* ldisc-specific char to be handled ASAP */ 23851078Speter u_char *ibuf; /* start of input buffer */ 23951078Speter u_char *ibufend; /* end of input buffer */ 24051078Speter u_char *ibufold; /* old input buffer, to be freed */ 24151078Speter u_char *ihighwater; /* threshold in input buffer */ 24251078Speter u_char *iptr; /* next free spot in input buffer */ 24351078Speter int ibufsize; /* size of ibuf (not include error bytes) */ 24451078Speter int ierroff; /* offset of error bytes in ibuf */ 24551078Speter 24651078Speter struct lbq obufq; /* head of queue of output buffers */ 24751078Speter struct lbq obufs[2]; /* output buffers */ 24851078Speter 24951078Speter Port_t data_port; /* i/o ports */ 25051078Speter#ifdef COM_ESP 25151078Speter Port_t esp_port; 25251078Speter#endif 25351078Speter Port_t int_id_port; 25451078Speter Port_t iobase; 25551078Speter Port_t modem_ctl_port; 25651078Speter Port_t line_status_port; 25751078Speter Port_t modem_status_port; 25851078Speter Port_t intr_ctl_port; /* Ports of IIR register */ 25951078Speter 26051078Speter struct tty *tp; /* cross reference */ 26151078Speter 26251078Speter /* Initial state. */ 26351078Speter struct termios it_in; /* should be in struct tty */ 26451078Speter struct termios it_out; 26551078Speter 26651078Speter /* Lock state. */ 26751078Speter struct termios lt_in; /* should be in struct tty */ 26851078Speter struct termios lt_out; 26951078Speter 27051078Speter bool_t do_timestamp; 27151078Speter bool_t do_dcd_timestamp; 27251078Speter struct timeval timestamp; 27351078Speter struct timeval dcd_timestamp; 27451078Speter struct pps_state pps; 27551078Speter 27651078Speter u_long bytes_in; /* statistics */ 27751078Speter u_long bytes_out; 27851078Speter u_int delta_error_counts[CE_NTYPES]; 27951078Speter u_long error_counts[CE_NTYPES]; 28051078Speter 28151078Speter struct resource *irqres; 28251078Speter struct resource *ioportres; 28351078Speter 28451078Speter /* 28551078Speter * Data area for output buffers. Someday we should build the output 28651078Speter * buffer queue without copying data. 28751078Speter */ 28851078Speter u_char obuf1[256]; 28951078Speter u_char obuf2[256]; 29051078Speter}; 29151078Speter 29251078Speter#ifdef COM_ESP 29351078Speterstatic int espattach __P((struct com_s *com, Port_t esp_port)); 29451078Speter#endif 29551078Speterstatic int sioattach __P((device_t dev)); 29651078Speter 29751078Speterstatic timeout_t siobusycheck; 29851078Speterstatic timeout_t siodtrwakeup; 29951078Speterstatic void comhardclose __P((struct com_s *com)); 30051078Speterstatic void sioinput __P((struct com_s *com)); 30151078Speterstatic void siointr1 __P((struct com_s *com)); 30251078Speterstatic void siointr __P((void *arg)); 30351078Speterstatic int commctl __P((struct com_s *com, int bits, int how)); 30451078Speterstatic int comparam __P((struct tty *tp, struct termios *t)); 30551078Speterstatic swihand_t siopoll; 30651078Speterstatic int sioprobe __P((device_t dev)); 30751078Speterstatic void siosettimeout __P((void)); 30851078Speterstatic int siosetwater __P((struct com_s *com, speed_t speed)); 30951078Speterstatic void comstart __P((struct tty *tp)); 31051654Sphkstatic void comstop __P((struct tty *tp, int rw)); 31151078Speterstatic timeout_t comwakeup; 31251078Speterstatic void disc_optim __P((struct tty *tp, struct termios *t, 31351078Speter struct com_s *com)); 31451078Speter 31551078Speter 31651078Speterstatic char driver_name[] = "sio"; 31751078Speter 31851078Speter/* table and macro for fast conversion from a unit number to its com struct */ 31951078Speterstatic devclass_t sio_devclass; 32051078Speter#define com_addr(unit) ((struct com_s *) \ 32151078Speter devclass_get_softc(sio_devclass, unit)) 32251078Speter 32351078Speterstatic device_method_t sio_methods[] = { 32451078Speter /* Device interface */ 32551078Speter DEVMETHOD(device_probe, sioprobe), 32651078Speter DEVMETHOD(device_attach, sioattach), 32751078Speter 32851078Speter { 0, 0 } 32951078Speter}; 33051078Speter 33151078Speterstatic driver_t sio_driver = { 33251078Speter driver_name, 33351078Speter sio_methods, 33451078Speter sizeof(struct com_s), 33551078Speter}; 33651078Speter 33751078Speterstatic d_open_t sioopen; 33851078Speterstatic d_close_t sioclose; 33951078Speterstatic d_read_t sioread; 34051078Speterstatic d_write_t siowrite; 34151078Speterstatic d_ioctl_t sioioctl; 34251078Speter 34351078Speter#define CDEV_MAJOR 28 34451078Speterstatic struct cdevsw sio_cdevsw = { 34551078Speter /* open */ sioopen, 34651078Speter /* close */ sioclose, 34751078Speter /* read */ sioread, 34851078Speter /* write */ siowrite, 34951078Speter /* ioctl */ sioioctl, 35051654Sphk /* poll */ ttypoll, 35151078Speter /* mmap */ nommap, 35251078Speter /* strategy */ nostrategy, 35351078Speter /* name */ driver_name, 35451078Speter /* maj */ CDEV_MAJOR, 35551078Speter /* dump */ nodump, 35651078Speter /* psize */ nopsize, 35751078Speter /* flags */ D_TTY, 35851078Speter /* bmaj */ -1 35951078Speter}; 36051078Speter 36151078Speterint comconsole = -1; 36251078Speterstatic volatile speed_t comdefaultrate = CONSPEED; 36351078Speter#ifdef __alpha__ 36451078Speterstatic volatile speed_t gdbdefaultrate = CONSPEED; 36551078Speter#endif 36651078Speterstatic u_int com_events; /* input chars + weighted output completions */ 36751078Speterstatic Port_t siocniobase; 36851078Speterstatic int siocnunit; 36951078Speterstatic Port_t siogdbiobase; 37051078Speterstatic int siogdbunit = -1; 37151078Speterstatic bool_t sio_registered; 37251078Speterstatic int sio_timeout; 37351078Speterstatic int sio_timeouts_until_log; 37451078Speterstatic struct callout_handle sio_timeout_handle 37551078Speter = CALLOUT_HANDLE_INITIALIZER(&sio_timeout_handle); 37651078Speter 37751078Speterstatic struct speedtab comspeedtab[] = { 37851078Speter { 0, 0 }, 37951078Speter { 50, COMBRD(50) }, 38051078Speter { 75, COMBRD(75) }, 38151078Speter { 110, COMBRD(110) }, 38251078Speter { 134, COMBRD(134) }, 38351078Speter { 150, COMBRD(150) }, 38451078Speter { 200, COMBRD(200) }, 38551078Speter { 300, COMBRD(300) }, 38651078Speter { 600, COMBRD(600) }, 38751078Speter { 1200, COMBRD(1200) }, 38851078Speter { 1800, COMBRD(1800) }, 38951078Speter { 2400, COMBRD(2400) }, 39051078Speter { 4800, COMBRD(4800) }, 39151078Speter { 9600, COMBRD(9600) }, 39251078Speter { 19200, COMBRD(19200) }, 39351078Speter { 38400, COMBRD(38400) }, 39451078Speter { 57600, COMBRD(57600) }, 39551078Speter { 115200, COMBRD(115200) }, 39651078Speter { -1, -1 } 39751078Speter}; 39851078Speter 39951078Speter#ifdef COM_ESP 40051078Speter/* XXX configure this properly. */ 40151078Speterstatic Port_t likely_com_ports[] = { 0x3f8, 0x2f8, 0x3e8, 0x2e8, }; 40251078Speterstatic Port_t likely_esp_ports[] = { 0x140, 0x180, 0x280, 0 }; 40351078Speter#endif 40451078Speter 40551078Speter/* 40651078Speter * handle sysctl read/write requests for console speed 40751078Speter * 40851078Speter * In addition to setting comdefaultrate for I/O through /dev/console, 40951078Speter * also set the initial and lock values for the /dev/ttyXX device 41051078Speter * if there is one associated with the console. Finally, if the /dev/tty 41151078Speter * device has already been open, change the speed on the open running port 41251078Speter * itself. 41351078Speter */ 41451078Speter 41551078Speterstatic int 41651078Spetersysctl_machdep_comdefaultrate SYSCTL_HANDLER_ARGS 41751078Speter{ 41851078Speter int error, s; 41951078Speter speed_t newspeed; 42051078Speter struct com_s *com; 42151078Speter struct tty *tp; 42251078Speter 42351078Speter newspeed = comdefaultrate; 42451078Speter 42551078Speter error = sysctl_handle_opaque(oidp, &newspeed, sizeof newspeed, req); 42651078Speter if (error || !req->newptr) 42751078Speter return (error); 42851078Speter 42951078Speter comdefaultrate = newspeed; 43051078Speter 43151078Speter if (comconsole < 0) /* serial console not selected? */ 43251078Speter return (0); 43351078Speter 43451078Speter com = com_addr(comconsole); 43551078Speter if (!com) 43651078Speter return (ENXIO); 43751078Speter 43851078Speter /* 43951078Speter * set the initial and lock rates for /dev/ttydXX and /dev/cuaXX 44051078Speter * (note, the lock rates really are boolean -- if non-zero, disallow 44151078Speter * speed changes) 44251078Speter */ 44351078Speter com->it_in.c_ispeed = com->it_in.c_ospeed = 44451078Speter com->lt_in.c_ispeed = com->lt_in.c_ospeed = 44551078Speter com->it_out.c_ispeed = com->it_out.c_ospeed = 44651078Speter com->lt_out.c_ispeed = com->lt_out.c_ospeed = comdefaultrate; 44751078Speter 44851078Speter /* 44951078Speter * if we're open, change the running rate too 45051078Speter */ 45151078Speter tp = com->tp; 45251078Speter if (tp && (tp->t_state & TS_ISOPEN)) { 45351078Speter tp->t_termios.c_ispeed = 45451078Speter tp->t_termios.c_ospeed = comdefaultrate; 45551078Speter s = spltty(); 45651078Speter error = comparam(tp, &tp->t_termios); 45751078Speter splx(s); 45851078Speter } 45951078Speter return error; 46051078Speter} 46151078Speter 46251078SpeterSYSCTL_PROC(_machdep, OID_AUTO, conspeed, CTLTYPE_INT | CTLFLAG_RW, 46351078Speter 0, 0, sysctl_machdep_comdefaultrate, "I", ""); 46451078Speter 46551078Speter#if NCARD > 0 46651078Speter/* 46751078Speter * PC-Card (PCMCIA) specific code. 46851078Speter */ 46951078Speterstatic int sioinit __P((struct pccard_devinfo *)); 47051078Speterstatic void siounload __P((struct pccard_devinfo *)); 47151078Speterstatic int card_intr __P((struct pccard_devinfo *)); 47251078Speter 47351078SpeterPCCARD_MODULE(sio, sioinit, siounload, card_intr, 0, tty_imask); 47451078Speter 47551078Speter/* 47651078Speter * Initialize the device - called from Slot manager. 47751078Speter */ 47851078Speterint 47951078Spetersioinit(struct pccard_devinfo *devi) 48051078Speter{ 48151078Speter 48251078Speter /* validate unit number. */ 48351078Speter if (devi->isahd.id_unit >= (NSIOTOT)) 48451078Speter return(ENODEV); 48551078Speter /* Make sure it isn't already probed. */ 48651078Speter if (com_addr(devi->isahd.id_unit)) 48751078Speter return(EBUSY); 48851078Speter 48951078Speter /* It's already probed as serial by Upper */ 49051078Speter devi->isahd.id_flags |= COM_C_NOPROBE; 49151078Speter 49251078Speter /* 49351078Speter * attach the device. 49451078Speter */ 49551078Speter if (sioattach(devi->isahd.id_device) == 0) 49651078Speter return(ENXIO); 49751078Speter 49851078Speter return(0); 49951078Speter} 50051078Speter 50151078Speter/* 50251078Speter * siounload - unload the driver and clear the table. 50351078Speter * XXX TODO: 50451078Speter * This is usually called when the card is ejected, but 50551078Speter * can be caused by a modunload of a controller driver. 50651078Speter * The idea is to reset the driver's view of the device 50751078Speter * and ensure that any driver entry points such as 50851078Speter * read and write do not hang. 50951078Speter */ 51051078Speterstatic void 51151078Spetersiounload(struct pccard_devinfo *devi) 51251078Speter{ 51351078Speter struct com_s *com; 51451078Speter 51551078Speter if (!devi) { 51651078Speter printf("NULL devi in siounload\n"); 51751078Speter return; 51851078Speter } 51951078Speter com = com_addr(devi->isahd.id_unit); 52051078Speter if (!com) { 52151078Speter printf("NULL com in siounload\n"); 52251078Speter return; 52351078Speter } 52451078Speter if (!com->iobase) { 52551078Speter printf("sio%d already unloaded!\n",devi->isahd.id_unit); 52651078Speter return; 52751078Speter } 52851078Speter if (com->tp && (com->tp->t_state & TS_ISOPEN)) { 52951078Speter com->gone = 1; 53051078Speter printf("sio%d: unload\n", devi->isahd.id_unit); 53151078Speter com->tp->t_gen++; 53251078Speter ttyclose(com->tp); 53351078Speter ttwakeup(com->tp); 53451078Speter ttwwakeup(com->tp); 53551078Speter } else { 53651078Speter if (com->ibuf != NULL) 53751078Speter free(com->ibuf, M_DEVBUF); 53851078Speter free(com, M_DEVBUF); 53951078Speter printf("sio%d: unload,gone\n", devi->isahd.id_unit); 54051078Speter } 54151078Speter} 54251078Speter 54351078Speter/* 54451078Speter * card_intr - Shared interrupt called from 54551078Speter * front end of PC-Card handler. 54651078Speter */ 54751078Speterstatic int 54851078Spetercard_intr(struct pccard_devinfo *devi) 54951078Speter{ 55051078Speter struct com_s *com; 55151078Speter 55251078Speter COM_LOCK(); 55351078Speter com = com_addr(devi->isahd.id_unit); 55451078Speter if (com && !com->gone) 55551078Speter siointr1(com_addr(devi->isahd.id_unit)); 55651078Speter COM_UNLOCK(); 55751078Speter return(1); 55851078Speter} 55951078Speter#endif /* NCARD > 0 */ 56051078Speter 56151088Speter#define SET_FLAG(dev, bit) device_set_flags(dev, device_get_flags(dev) | (bit)) 56251088Speter#define CLR_FLAG(dev, bit) device_set_flags(dev, device_get_flags(dev) & ~(bit)) 56351078Speter 56451078Speterstatic struct isa_pnp_id sio_ids[] = { 56551078Speter {0x0005d041, "Standard PC COM port"}, /* PNP0500 */ 56651078Speter {0x0105d041, "16550A-compatible COM port"}, /* PNP0501 */ 56751078Speter {0x0205d041, "Multiport serial device (non-intelligent 16550)"}, /* PNP0502 */ 56851078Speter {0x1005d041, "Generic IRDA-compatible device"}, /* PNP0510 */ 56951078Speter {0x1105d041, "Generic IRDA-compatible device"}, /* PNP0511 */ 57051918Sdeischen {0x30207256, NULL}, /* USR2030 */ 57151918Sdeischen {0x31307256, NULL}, /* USR3031 */ 57251918Sdeischen {0x8020b04e, NULL}, /* SUP2080 */ 57351918Sdeischen {0x8024b04e, NULL}, /* SUP2480 */ 57451078Speter {0} 57551078Speter}; 57651078Speter 57751078Speterstatic int 57851078Spetersioprobe(dev) 57951078Speter device_t dev; 58051078Speter{ 58151078Speter static bool_t already_init; 58251078Speter bool_t failures[10]; 58351078Speter int fn; 58451078Speter device_t idev; 58551078Speter Port_t iobase; 58651078Speter intrmask_t irqmap[4]; 58751078Speter intrmask_t irqs; 58851078Speter u_char mcr_image; 58951078Speter int result; 59051078Speter device_t xdev; 59151088Speter u_int flags = device_get_flags(dev); 59251078Speter int rid; 59351078Speter struct resource *port; 59451078Speter 59551078Speter /* Check isapnp ids */ 59651078Speter if (ISA_PNP_PROBE(device_get_parent(dev), dev, sio_ids) == ENXIO) 59751078Speter return (ENXIO); 59851078Speter 59951078Speter rid = 0; 60051078Speter port = bus_alloc_resource(dev, SYS_RES_IOPORT, &rid, 60151078Speter 0, ~0, IO_COMSIZE, RF_ACTIVE); 60251078Speter if (!port) 60351078Speter return ENXIO; 60451078Speter 60551078Speter if (!already_init) { 60651078Speter /* 60751078Speter * Turn off MCR_IENABLE for all likely serial ports. An unused 60851078Speter * port with its MCR_IENABLE gate open will inhibit interrupts 60951078Speter * from any used port that shares the interrupt vector. 61051078Speter * XXX the gate enable is elsewhere for some multiports. 61151078Speter */ 61251078Speter device_t *devs; 61351078Speter int count, i; 61451078Speter 61551078Speter devclass_get_devices(sio_devclass, &devs, &count); 61651078Speter for (i = 0; i < count; i++) { 61751078Speter xdev = devs[i]; 61851078Speter if (device_is_enabled(xdev)) 61951078Speter outb(isa_get_port(xdev) + com_mcr, 0); 62051078Speter } 62151078Speter free(devs, M_TEMP); 62251078Speter already_init = TRUE; 62351078Speter } 62451078Speter 62551078Speter if (COM_LLCONSOLE(flags)) { 62651078Speter printf("sio%d: reserved for low-level i/o\n", 62751078Speter device_get_unit(dev)); 62851078Speter return (ENXIO); 62951078Speter } 63051078Speter 63151078Speter /* 63251078Speter * If the device is on a multiport card and has an AST/4 63351078Speter * compatible interrupt control register, initialize this 63451078Speter * register and prepare to leave MCR_IENABLE clear in the mcr. 63551078Speter * Otherwise, prepare to set MCR_IENABLE in the mcr. 63651078Speter * Point idev to the device struct giving the correct id_irq. 63751078Speter * This is the struct for the master device if there is one. 63851078Speter */ 63951078Speter idev = dev; 64051078Speter mcr_image = MCR_IENABLE; 64151078Speter#ifdef COM_MULTIPORT 64251078Speter if (COM_ISMULTIPORT(flags)) { 64351078Speter idev = devclass_get_device(sio_devclass, COM_MPMASTER(flags)); 64451078Speter if (idev == NULL) { 64551078Speter printf("sio%d: master device %d not configured\n", 64651078Speter device_get_unit(dev), COM_MPMASTER(flags)); 64751078Speter idev = dev; 64851078Speter } 64951078Speter if (!COM_NOTAST4(flags)) { 65051078Speter outb(isa_get_port(idev) + com_scr, 65151078Speter isa_get_irq(idev) >= 0 ? 0x80 : 0); 65251078Speter mcr_image = 0; 65351078Speter } 65451078Speter } 65551078Speter#endif /* COM_MULTIPORT */ 65651078Speter if (isa_get_irq(idev) < 0) 65751078Speter mcr_image = 0; 65851078Speter 65951078Speter bzero(failures, sizeof failures); 66051078Speter iobase = rman_get_start(port); 66151078Speter 66251078Speter /* 66351078Speter * We don't want to get actual interrupts, just masked ones. 66451078Speter * Interrupts from this line should already be masked in the ICU, 66551078Speter * but mask them in the processor as well in case there are some 66651078Speter * (misconfigured) shared interrupts. 66751078Speter */ 66851078Speter disable_intr(); 66951078Speter/* EXTRA DELAY? */ 67051078Speter 67151078Speter /* 67251078Speter * Initialize the speed and the word size and wait long enough to 67351078Speter * drain the maximum of 16 bytes of junk in device output queues. 67451078Speter * The speed is undefined after a master reset and must be set 67551078Speter * before relying on anything related to output. There may be 67651078Speter * junk after a (very fast) soft reboot and (apparently) after 67751078Speter * master reset. 67851078Speter * XXX what about the UART bug avoided by waiting in comparam()? 67951078Speter * We don't want to to wait long enough to drain at 2 bps. 68051078Speter */ 68151078Speter if (iobase == siocniobase) 68251078Speter DELAY((16 + 1) * 1000000 / (comdefaultrate / 10)); 68351078Speter else { 68451078Speter outb(iobase + com_cfcr, CFCR_DLAB | CFCR_8BITS); 68551078Speter outb(iobase + com_dlbl, COMBRD(SIO_TEST_SPEED) & 0xff); 68651078Speter outb(iobase + com_dlbh, (u_int) COMBRD(SIO_TEST_SPEED) >> 8); 68751078Speter outb(iobase + com_cfcr, CFCR_8BITS); 68851078Speter DELAY((16 + 1) * 1000000 / (SIO_TEST_SPEED / 10)); 68951078Speter } 69051078Speter 69151078Speter /* 69251078Speter * Enable the interrupt gate and disable device interupts. This 69351078Speter * should leave the device driving the interrupt line low and 69451078Speter * guarantee an edge trigger if an interrupt can be generated. 69551078Speter */ 69651078Speter/* EXTRA DELAY? */ 69751078Speter outb(iobase + com_mcr, mcr_image); 69851078Speter outb(iobase + com_ier, 0); 69951078Speter DELAY(1000); /* XXX */ 70051078Speter irqmap[0] = isa_irq_pending(); 70151078Speter 70251078Speter /* 70351078Speter * Attempt to set loopback mode so that we can send a null byte 70451078Speter * without annoying any external device. 70551078Speter */ 70651078Speter/* EXTRA DELAY? */ 70751078Speter outb(iobase + com_mcr, mcr_image | MCR_LOOPBACK); 70851078Speter 70951078Speter /* 71051078Speter * Attempt to generate an output interrupt. On 8250's, setting 71151078Speter * IER_ETXRDY generates an interrupt independent of the current 71251078Speter * setting and independent of whether the THR is empty. On 16450's, 71351078Speter * setting IER_ETXRDY generates an interrupt independent of the 71451078Speter * current setting. On 16550A's, setting IER_ETXRDY only 71551078Speter * generates an interrupt when IER_ETXRDY is not already set. 71651078Speter */ 71751078Speter outb(iobase + com_ier, IER_ETXRDY); 71851078Speter 71951078Speter /* 72051078Speter * On some 16x50 incompatibles, setting IER_ETXRDY doesn't generate 72151078Speter * an interrupt. They'd better generate one for actually doing 72251078Speter * output. Loopback may be broken on the same incompatibles but 72351078Speter * it's unlikely to do more than allow the null byte out. 72451078Speter */ 72551078Speter outb(iobase + com_data, 0); 72651078Speter DELAY((1 + 2) * 1000000 / (SIO_TEST_SPEED / 10)); 72751078Speter 72851078Speter /* 72951078Speter * Turn off loopback mode so that the interrupt gate works again 73051078Speter * (MCR_IENABLE was hidden). This should leave the device driving 73151078Speter * an interrupt line high. It doesn't matter if the interrupt 73251078Speter * line oscillates while we are not looking at it, since interrupts 73351078Speter * are disabled. 73451078Speter */ 73551078Speter/* EXTRA DELAY? */ 73651078Speter outb(iobase + com_mcr, mcr_image); 73751078Speter 73851078Speter /* 73951078Speter * It's a definitly Serial PCMCIA(16550A), but still be required 74051078Speter * for IIR_TXRDY implementation ( Palido 321s, DC-1S... ) 74151078Speter */ 74251078Speter if ( COM_NOPROBE(flags) ) { 74351078Speter /* Reading IIR register twice */ 74451078Speter for ( fn = 0; fn < 2; fn ++ ) { 74551078Speter DELAY(10000); 74651078Speter failures[6] = inb(iobase + com_iir); 74751078Speter } 74851078Speter /* Check IIR_TXRDY clear ? */ 74951078Speter result = 0; 75051078Speter if ( failures[6] & IIR_TXRDY ) { 75151078Speter /* Nop, Double check with clearing IER */ 75251078Speter outb(iobase + com_ier, 0); 75351078Speter if ( inb(iobase + com_iir) & IIR_NOPEND ) { 75451078Speter /* Ok. we're familia this gang */ 75551078Speter SET_FLAG(dev, COM_C_IIR_TXRDYBUG); /* Set IIR_TXRDYBUG */ 75651078Speter } else { 75751078Speter /* Unknown, Just omit this chip.. XXX */ 75851078Speter result = ENXIO; 75951078Speter } 76051078Speter } else { 76151078Speter /* OK. this is well-known guys */ 76251078Speter CLR_FLAG(dev, COM_C_IIR_TXRDYBUG); /*Clear IIR_TXRDYBUG*/ 76351078Speter } 76451078Speter outb(iobase + com_cfcr, CFCR_8BITS); 76551078Speter enable_intr(); 76651078Speter bus_release_resource(dev, SYS_RES_IOPORT, rid, port); 76751078Speter return (iobase == siocniobase ? 0 : result); 76851078Speter } 76951078Speter 77051078Speter /* 77151078Speter * Check that 77251078Speter * o the CFCR, IER and MCR in UART hold the values written to them 77351078Speter * (the values happen to be all distinct - this is good for 77451078Speter * avoiding false positive tests from bus echoes). 77551078Speter * o an output interrupt is generated and its vector is correct. 77651078Speter * o the interrupt goes away when the IIR in the UART is read. 77751078Speter */ 77851078Speter/* EXTRA DELAY? */ 77951078Speter failures[0] = inb(iobase + com_cfcr) - CFCR_8BITS; 78051078Speter failures[1] = inb(iobase + com_ier) - IER_ETXRDY; 78151078Speter failures[2] = inb(iobase + com_mcr) - mcr_image; 78251078Speter DELAY(10000); /* Some internal modems need this time */ 78351078Speter irqmap[1] = isa_irq_pending(); 78451078Speter failures[4] = (inb(iobase + com_iir) & IIR_IMASK) - IIR_TXRDY; 78551078Speter DELAY(1000); /* XXX */ 78651078Speter irqmap[2] = isa_irq_pending(); 78751078Speter failures[6] = (inb(iobase + com_iir) & IIR_IMASK) - IIR_NOPEND; 78851078Speter 78951078Speter /* 79051078Speter * Turn off all device interrupts and check that they go off properly. 79151078Speter * Leave MCR_IENABLE alone. For ports without a master port, it gates 79251078Speter * the OUT2 output of the UART to 79351078Speter * the ICU input. Closing the gate would give a floating ICU input 79451078Speter * (unless there is another device driving it) and spurious interrupts. 79551078Speter * (On the system that this was first tested on, the input floats high 79651078Speter * and gives a (masked) interrupt as soon as the gate is closed.) 79751078Speter */ 79851078Speter outb(iobase + com_ier, 0); 79951078Speter outb(iobase + com_cfcr, CFCR_8BITS); /* dummy to avoid bus echo */ 80051078Speter failures[7] = inb(iobase + com_ier); 80151078Speter DELAY(1000); /* XXX */ 80251078Speter irqmap[3] = isa_irq_pending(); 80351078Speter failures[9] = (inb(iobase + com_iir) & IIR_IMASK) - IIR_NOPEND; 80451078Speter 80551078Speter enable_intr(); 80651078Speter 80751078Speter irqs = irqmap[1] & ~irqmap[0]; 80851078Speter if (isa_get_irq(idev) >= 0 && ((1 << isa_get_irq(idev)) & irqs) == 0) 80951078Speter printf( 81051078Speter "sio%d: configured irq %d not in bitmap of probed irqs %#x\n", 81151078Speter device_get_unit(dev), isa_get_irq(idev), irqs); 81251078Speter if (bootverbose) 81351078Speter printf("sio%d: irq maps: %#x %#x %#x %#x\n", 81451078Speter device_get_unit(dev), 81551078Speter irqmap[0], irqmap[1], irqmap[2], irqmap[3]); 81651078Speter 81751078Speter result = 0; 81851078Speter for (fn = 0; fn < sizeof failures; ++fn) 81951078Speter if (failures[fn]) { 82051078Speter outb(iobase + com_mcr, 0); 82151078Speter result = ENXIO; 82251078Speter if (bootverbose) { 82351078Speter printf("sio%d: probe failed test(s):", 82451078Speter device_get_unit(dev)); 82551078Speter for (fn = 0; fn < sizeof failures; ++fn) 82651078Speter if (failures[fn]) 82751078Speter printf(" %d", fn); 82851078Speter printf("\n"); 82951078Speter } 83051078Speter break; 83151078Speter } 83251078Speter bus_release_resource(dev, SYS_RES_IOPORT, rid, port); 83351078Speter return (iobase == siocniobase ? 0 : result); 83451078Speter} 83551078Speter 83651078Speter#ifdef COM_ESP 83751078Speterstatic int 83851078Speterespattach(com, esp_port) 83951078Speter struct com_s *com; 84051078Speter Port_t esp_port; 84151078Speter{ 84251078Speter u_char dips; 84351078Speter u_char val; 84451078Speter 84551078Speter /* 84651078Speter * Check the ESP-specific I/O port to see if we're an ESP 84751078Speter * card. If not, return failure immediately. 84851078Speter */ 84951078Speter if ((inb(esp_port) & 0xf3) == 0) { 85051078Speter printf(" port 0x%x is not an ESP board?\n", esp_port); 85151078Speter return (0); 85251078Speter } 85351078Speter 85451078Speter /* 85551078Speter * We've got something that claims to be a Hayes ESP card. 85651078Speter * Let's hope so. 85751078Speter */ 85851078Speter 85951078Speter /* Get the dip-switch configuration */ 86051078Speter outb(esp_port + ESP_CMD1, ESP_GETDIPS); 86151078Speter dips = inb(esp_port + ESP_STATUS1); 86251078Speter 86351078Speter /* 86451078Speter * Bits 0,1 of dips say which COM port we are. 86551078Speter */ 86651078Speter if (com->iobase == likely_com_ports[dips & 0x03]) 86751078Speter printf(" : ESP"); 86851078Speter else { 86951078Speter printf(" esp_port has com %d\n", dips & 0x03); 87051078Speter return (0); 87151078Speter } 87251078Speter 87351078Speter /* 87451078Speter * Check for ESP version 2.0 or later: bits 4,5,6 = 010. 87551078Speter */ 87651078Speter outb(esp_port + ESP_CMD1, ESP_GETTEST); 87751078Speter val = inb(esp_port + ESP_STATUS1); /* clear reg 1 */ 87851078Speter val = inb(esp_port + ESP_STATUS2); 87951078Speter if ((val & 0x70) < 0x20) { 88051078Speter printf("-old (%o)", val & 0x70); 88151078Speter return (0); 88251078Speter } 88351078Speter 88451078Speter /* 88551078Speter * Check for ability to emulate 16550: bit 7 == 1 88651078Speter */ 88751078Speter if ((dips & 0x80) == 0) { 88851078Speter printf(" slave"); 88951078Speter return (0); 89051078Speter } 89151078Speter 89251078Speter /* 89351078Speter * Okay, we seem to be a Hayes ESP card. Whee. 89451078Speter */ 89551078Speter com->esp = TRUE; 89651078Speter com->esp_port = esp_port; 89751078Speter return (1); 89851078Speter} 89951078Speter#endif /* COM_ESP */ 90051078Speter 90151078Speterstatic int 90251078Spetersioattach(dev) 90351078Speter device_t dev; 90451078Speter{ 90551078Speter struct com_s *com; 90651078Speter#ifdef COM_ESP 90751078Speter Port_t *espp; 90851078Speter#endif 90951078Speter Port_t iobase; 91051078Speter int unit; 91151078Speter void *ih; 91251088Speter u_int flags = device_get_flags(dev); 91351078Speter int rid; 91451078Speter struct resource *port; 91551078Speter 91651078Speter rid = 0; 91751078Speter port = bus_alloc_resource(dev, SYS_RES_IOPORT, &rid, 91851078Speter 0, ~0, IO_COMSIZE, RF_ACTIVE); 91951078Speter if (!port) 92051078Speter return ENXIO; 92151078Speter 92251078Speter iobase = rman_get_start(port); 92351078Speter unit = device_get_unit(dev); 92451078Speter com = device_get_softc(dev); 92551078Speter 92651078Speter /* 92751078Speter * sioprobe() has initialized the device registers as follows: 92851078Speter * o cfcr = CFCR_8BITS. 92951078Speter * It is most important that CFCR_DLAB is off, so that the 93051078Speter * data port is not hidden when we enable interrupts. 93151078Speter * o ier = 0. 93251078Speter * Interrupts are only enabled when the line is open. 93351078Speter * o mcr = MCR_IENABLE, or 0 if the port has AST/4 compatible 93451078Speter * interrupt control register or the config specifies no irq. 93551078Speter * Keeping MCR_DTR and MCR_RTS off might stop the external 93651078Speter * device from sending before we are ready. 93751078Speter */ 93851078Speter bzero(com, sizeof *com); 93951078Speter com->unit = unit; 94051078Speter com->ioportres = port; 94151078Speter com->cfcr_image = CFCR_8BITS; 94251078Speter com->dtr_wait = 3 * hz; 94351078Speter com->loses_outints = COM_LOSESOUTINTS(flags) != 0; 94451078Speter com->no_irq = isa_get_irq(dev) < 0; 94551078Speter com->tx_fifo_size = 1; 94651078Speter com->obufs[0].l_head = com->obuf1; 94751078Speter com->obufs[1].l_head = com->obuf2; 94851078Speter 94951078Speter com->iobase = iobase; 95051078Speter com->data_port = iobase + com_data; 95151078Speter com->int_id_port = iobase + com_iir; 95251078Speter com->modem_ctl_port = iobase + com_mcr; 95351078Speter com->mcr_image = inb(com->modem_ctl_port); 95451078Speter com->line_status_port = iobase + com_lsr; 95551078Speter com->modem_status_port = iobase + com_msr; 95651078Speter com->intr_ctl_port = iobase + com_ier; 95751078Speter 95851078Speter /* 95951078Speter * We don't use all the flags from <sys/ttydefaults.h> since they 96051078Speter * are only relevant for logins. It's important to have echo off 96151078Speter * initially so that the line doesn't start blathering before the 96251078Speter * echo flag can be turned off. 96351078Speter */ 96451078Speter com->it_in.c_iflag = 0; 96551078Speter com->it_in.c_oflag = 0; 96651078Speter com->it_in.c_cflag = TTYDEF_CFLAG; 96751078Speter com->it_in.c_lflag = 0; 96851078Speter if (unit == comconsole) { 96951078Speter com->it_in.c_iflag = TTYDEF_IFLAG; 97051078Speter com->it_in.c_oflag = TTYDEF_OFLAG; 97151078Speter com->it_in.c_cflag = TTYDEF_CFLAG | CLOCAL; 97251078Speter com->it_in.c_lflag = TTYDEF_LFLAG; 97351078Speter com->lt_out.c_cflag = com->lt_in.c_cflag = CLOCAL; 97451078Speter com->lt_out.c_ispeed = com->lt_out.c_ospeed = 97551078Speter com->lt_in.c_ispeed = com->lt_in.c_ospeed = 97651078Speter com->it_in.c_ispeed = com->it_in.c_ospeed = comdefaultrate; 97751078Speter } else 97851078Speter com->it_in.c_ispeed = com->it_in.c_ospeed = TTYDEF_SPEED; 97951078Speter if (siosetwater(com, com->it_in.c_ispeed) != 0) { 98051078Speter enable_intr(); 98151078Speter free(com, M_DEVBUF); 98251078Speter return (0); 98351078Speter } 98451078Speter enable_intr(); 98551078Speter termioschars(&com->it_in); 98651078Speter com->it_out = com->it_in; 98751078Speter 98851078Speter /* attempt to determine UART type */ 98951078Speter printf("sio%d: type", unit); 99051078Speter 99151078Speter 99251078Speter#ifdef COM_MULTIPORT 99351078Speter if (!COM_ISMULTIPORT(flags) && !COM_IIR_TXRDYBUG(flags)) 99451078Speter#else 99551078Speter if (!COM_IIR_TXRDYBUG(flags)) 99651078Speter#endif 99751078Speter { 99851078Speter u_char scr; 99951078Speter u_char scr1; 100051078Speter u_char scr2; 100151078Speter 100251078Speter scr = inb(iobase + com_scr); 100351078Speter outb(iobase + com_scr, 0xa5); 100451078Speter scr1 = inb(iobase + com_scr); 100551078Speter outb(iobase + com_scr, 0x5a); 100651078Speter scr2 = inb(iobase + com_scr); 100751078Speter outb(iobase + com_scr, scr); 100851078Speter if (scr1 != 0xa5 || scr2 != 0x5a) { 100951078Speter printf(" 8250"); 101051078Speter goto determined_type; 101151078Speter } 101251078Speter } 101351078Speter outb(iobase + com_fifo, FIFO_ENABLE | FIFO_RX_HIGH); 101451078Speter DELAY(100); 101551078Speter com->st16650a = 0; 101651078Speter switch (inb(com->int_id_port) & IIR_FIFO_MASK) { 101751078Speter case FIFO_RX_LOW: 101851078Speter printf(" 16450"); 101951078Speter break; 102051078Speter case FIFO_RX_MEDL: 102151078Speter printf(" 16450?"); 102251078Speter break; 102351078Speter case FIFO_RX_MEDH: 102451078Speter printf(" 16550?"); 102551078Speter break; 102651078Speter case FIFO_RX_HIGH: 102751078Speter if (COM_NOFIFO(flags)) { 102851078Speter printf(" 16550A fifo disabled"); 102951078Speter } else { 103051078Speter com->hasfifo = TRUE; 103151078Speter if (COM_ST16650A(flags)) { 103251078Speter com->st16650a = 1; 103351078Speter com->tx_fifo_size = 32; 103451078Speter printf(" ST16650A"); 103551078Speter } else { 103651078Speter com->tx_fifo_size = COM_FIFOSIZE(flags); 103751078Speter printf(" 16550A"); 103851078Speter } 103951078Speter } 104051078Speter#ifdef COM_ESP 104151078Speter for (espp = likely_esp_ports; *espp != 0; espp++) 104251078Speter if (espattach(com, *espp)) { 104351078Speter com->tx_fifo_size = 1024; 104451078Speter break; 104551078Speter } 104651078Speter#endif 104751078Speter if (!com->st16650a) { 104851078Speter if (!com->tx_fifo_size) 104951078Speter com->tx_fifo_size = 16; 105051078Speter else 105151078Speter printf(" lookalike with %d bytes FIFO", 105251078Speter com->tx_fifo_size); 105351078Speter } 105451078Speter 105551078Speter break; 105651078Speter } 105751078Speter 105851078Speter#ifdef COM_ESP 105951078Speter if (com->esp) { 106051078Speter /* 106151078Speter * Set 16550 compatibility mode. 106251078Speter * We don't use the ESP_MODE_SCALE bit to increase the 106351078Speter * fifo trigger levels because we can't handle large 106451078Speter * bursts of input. 106551078Speter * XXX flow control should be set in comparam(), not here. 106651078Speter */ 106751078Speter outb(com->esp_port + ESP_CMD1, ESP_SETMODE); 106851078Speter outb(com->esp_port + ESP_CMD2, ESP_MODE_RTS | ESP_MODE_FIFO); 106951078Speter 107051078Speter /* Set RTS/CTS flow control. */ 107151078Speter outb(com->esp_port + ESP_CMD1, ESP_SETFLOWTYPE); 107251078Speter outb(com->esp_port + ESP_CMD2, ESP_FLOW_RTS); 107351078Speter outb(com->esp_port + ESP_CMD2, ESP_FLOW_CTS); 107451078Speter 107551078Speter /* Set flow-control levels. */ 107651078Speter outb(com->esp_port + ESP_CMD1, ESP_SETRXFLOW); 107751078Speter outb(com->esp_port + ESP_CMD2, HIBYTE(768)); 107851078Speter outb(com->esp_port + ESP_CMD2, LOBYTE(768)); 107951078Speter outb(com->esp_port + ESP_CMD2, HIBYTE(512)); 108051078Speter outb(com->esp_port + ESP_CMD2, LOBYTE(512)); 108151078Speter } 108251078Speter#endif /* COM_ESP */ 108351078Speter outb(iobase + com_fifo, 0); 108451078Speterdetermined_type: ; 108551078Speter 108651078Speter#ifdef COM_MULTIPORT 108751078Speter if (COM_ISMULTIPORT(flags)) { 108851078Speter com->multiport = TRUE; 108951078Speter printf(" (multiport"); 109051078Speter if (unit == COM_MPMASTER(flags)) 109151078Speter printf(" master"); 109251078Speter printf(")"); 109351078Speter com->no_irq = 109451078Speter isa_get_irq(devclass_get_device 109551078Speter (sio_devclass, COM_MPMASTER(flags))) < 0; 109651078Speter } 109751078Speter#endif /* COM_MULTIPORT */ 109851078Speter if (unit == comconsole) 109951078Speter printf(", console"); 110051078Speter if ( COM_IIR_TXRDYBUG(flags) ) 110151078Speter printf(" with a bogus IIR_TXRDY register"); 110251078Speter printf("\n"); 110351078Speter 110451078Speter if (!sio_registered) { 110551078Speter register_swi(SWI_TTY, siopoll); 110651078Speter sio_registered = TRUE; 110751078Speter } 110851078Speter make_dev(&sio_cdevsw, unit, 110951078Speter UID_ROOT, GID_WHEEL, 0600, "ttyd%r", unit); 111051078Speter make_dev(&sio_cdevsw, unit | CONTROL_INIT_STATE, 111151078Speter UID_ROOT, GID_WHEEL, 0600, "ttyid%r", unit); 111251078Speter make_dev(&sio_cdevsw, unit | CONTROL_LOCK_STATE, 111351078Speter UID_ROOT, GID_WHEEL, 0600, "ttyld%r", unit); 111451078Speter make_dev(&sio_cdevsw, unit | CALLOUT_MASK, 111551078Speter UID_UUCP, GID_DIALER, 0660, "cuaa%r", unit); 111651078Speter make_dev(&sio_cdevsw, unit | CALLOUT_MASK | CONTROL_INIT_STATE, 111751078Speter UID_UUCP, GID_DIALER, 0660, "cuaia%r", unit); 111851078Speter make_dev(&sio_cdevsw, unit | CALLOUT_MASK | CONTROL_LOCK_STATE, 111951078Speter UID_UUCP, GID_DIALER, 0660, "cuala%r", unit); 112051078Speter com->flags = flags; 112151078Speter com->pps.ppscap = PPS_CAPTUREASSERT | PPS_CAPTURECLEAR; 112251078Speter pps_init(&com->pps); 112351078Speter 112451078Speter rid = 0; 112551078Speter com->irqres = bus_alloc_resource(dev, SYS_RES_IRQ, &rid, 0ul, ~0ul, 1, 112651078Speter RF_SHAREABLE | RF_ACTIVE); 112751078Speter BUS_SETUP_INTR(device_get_parent(dev), dev, com->irqres, 112851078Speter INTR_TYPE_TTY | INTR_TYPE_FAST, 112951078Speter siointr, com, &ih); 113051078Speter 113151078Speter return (0); 113251078Speter} 113351078Speter 113451078Speterstatic int 113551078Spetersioopen(dev, flag, mode, p) 113651078Speter dev_t dev; 113751078Speter int flag; 113851078Speter int mode; 113951078Speter struct proc *p; 114051078Speter{ 114151078Speter struct com_s *com; 114251078Speter int error; 114351078Speter Port_t iobase; 114451078Speter int mynor; 114551078Speter int s; 114651078Speter struct tty *tp; 114751078Speter int unit; 114851078Speter 114951078Speter mynor = minor(dev); 115051078Speter unit = MINOR_TO_UNIT(mynor); 115151078Speter if ((u_int) unit >= NSIOTOT || (com = com_addr(unit)) == NULL) 115251078Speter return (ENXIO); 115351078Speter if (com->gone) 115451078Speter return (ENXIO); 115551078Speter if (mynor & CONTROL_MASK) 115651078Speter return (0); 115751078Speter tp = dev->si_tty = com->tp = ttymalloc(com->tp); 115851078Speter s = spltty(); 115951078Speter /* 116051078Speter * We jump to this label after all non-interrupted sleeps to pick 116151078Speter * up any changes of the device state. 116251078Speter */ 116351078Speteropen_top: 116451078Speter while (com->state & CS_DTR_OFF) { 116551078Speter error = tsleep(&com->dtr_wait, TTIPRI | PCATCH, "siodtr", 0); 116651078Speter if (com_addr(unit) == NULL) 116751078Speter return (ENXIO); 116851078Speter if (error != 0 || com->gone) 116951078Speter goto out; 117051078Speter } 117151078Speter if (tp->t_state & TS_ISOPEN) { 117251078Speter /* 117351078Speter * The device is open, so everything has been initialized. 117451078Speter * Handle conflicts. 117551078Speter */ 117651078Speter if (mynor & CALLOUT_MASK) { 117751078Speter if (!com->active_out) { 117851078Speter error = EBUSY; 117951078Speter goto out; 118051078Speter } 118151078Speter } else { 118251078Speter if (com->active_out) { 118351078Speter if (flag & O_NONBLOCK) { 118451078Speter error = EBUSY; 118551078Speter goto out; 118651078Speter } 118751078Speter error = tsleep(&com->active_out, 118851078Speter TTIPRI | PCATCH, "siobi", 0); 118951078Speter if (com_addr(unit) == NULL) 119051078Speter return (ENXIO); 119151078Speter if (error != 0 || com->gone) 119251078Speter goto out; 119351078Speter goto open_top; 119451078Speter } 119551078Speter } 119651078Speter if (tp->t_state & TS_XCLUDE && 119751078Speter suser(p)) { 119851078Speter error = EBUSY; 119951078Speter goto out; 120051078Speter } 120151078Speter } else { 120251078Speter /* 120351078Speter * The device isn't open, so there are no conflicts. 120451078Speter * Initialize it. Initialization is done twice in many 120551078Speter * cases: to preempt sleeping callin opens if we are 120651078Speter * callout, and to complete a callin open after DCD rises. 120751078Speter */ 120851078Speter tp->t_oproc = comstart; 120951078Speter tp->t_param = comparam; 121051654Sphk tp->t_stop = comstop; 121151078Speter tp->t_dev = dev; 121251078Speter tp->t_termios = mynor & CALLOUT_MASK 121351078Speter ? com->it_out : com->it_in; 121451078Speter (void)commctl(com, TIOCM_DTR | TIOCM_RTS, DMSET); 121551078Speter com->poll = com->no_irq; 121651078Speter com->poll_output = com->loses_outints; 121751078Speter ++com->wopeners; 121851078Speter error = comparam(tp, &tp->t_termios); 121951078Speter --com->wopeners; 122051078Speter if (error != 0) 122151078Speter goto out; 122251078Speter /* 122351078Speter * XXX we should goto open_top if comparam() slept. 122451078Speter */ 122551078Speter iobase = com->iobase; 122651078Speter if (com->hasfifo) { 122751078Speter /* 122851078Speter * (Re)enable and drain fifos. 122951078Speter * 123051078Speter * Certain SMC chips cause problems if the fifos 123151078Speter * are enabled while input is ready. Turn off the 123251078Speter * fifo if necessary to clear the input. We test 123351078Speter * the input ready bit after enabling the fifos 123451078Speter * since we've already enabled them in comparam() 123551078Speter * and to handle races between enabling and fresh 123651078Speter * input. 123751078Speter */ 123851078Speter while (TRUE) { 123951078Speter outb(iobase + com_fifo, 124051078Speter FIFO_RCV_RST | FIFO_XMT_RST 124151078Speter | com->fifo_image); 124251078Speter /* 124351078Speter * XXX the delays are for superstitious 124451078Speter * historical reasons. It must be less than 124551078Speter * the character time at the maximum 124651078Speter * supported speed (87 usec at 115200 bps 124751078Speter * 8N1). Otherwise we might loop endlessly 124851078Speter * if data is streaming in. We used to use 124951078Speter * delays of 100. That usually worked 125051078Speter * because DELAY(100) used to usually delay 125151078Speter * for about 85 usec instead of 100. 125251078Speter */ 125351078Speter DELAY(50); 125451078Speter if (!(inb(com->line_status_port) & LSR_RXRDY)) 125551078Speter break; 125651078Speter outb(iobase + com_fifo, 0); 125751078Speter DELAY(50); 125851078Speter (void) inb(com->data_port); 125951078Speter } 126051078Speter } 126151078Speter 126251078Speter disable_intr(); 126351078Speter (void) inb(com->line_status_port); 126451078Speter (void) inb(com->data_port); 126551078Speter com->prev_modem_status = com->last_modem_status 126651078Speter = inb(com->modem_status_port); 126751078Speter if (COM_IIR_TXRDYBUG(com->flags)) { 126851078Speter outb(com->intr_ctl_port, IER_ERXRDY | IER_ERLS 126951078Speter | IER_EMSC); 127051078Speter } else { 127151078Speter outb(com->intr_ctl_port, IER_ERXRDY | IER_ETXRDY 127251078Speter | IER_ERLS | IER_EMSC); 127351078Speter } 127451078Speter enable_intr(); 127551078Speter /* 127651078Speter * Handle initial DCD. Callout devices get a fake initial 127751078Speter * DCD (trapdoor DCD). If we are callout, then any sleeping 127851078Speter * callin opens get woken up and resume sleeping on "siobi" 127951078Speter * instead of "siodcd". 128051078Speter */ 128151078Speter /* 128251078Speter * XXX `mynor & CALLOUT_MASK' should be 128351078Speter * `tp->t_cflag & (SOFT_CARRIER | TRAPDOOR_CARRIER) where 128451078Speter * TRAPDOOR_CARRIER is the default initial state for callout 128551078Speter * devices and SOFT_CARRIER is like CLOCAL except it hides 128651078Speter * the true carrier. 128751078Speter */ 128851078Speter if (com->prev_modem_status & MSR_DCD || mynor & CALLOUT_MASK) 128951078Speter (*linesw[tp->t_line].l_modem)(tp, 1); 129051078Speter } 129151078Speter /* 129251078Speter * Wait for DCD if necessary. 129351078Speter */ 129451078Speter if (!(tp->t_state & TS_CARR_ON) && !(mynor & CALLOUT_MASK) 129551078Speter && !(tp->t_cflag & CLOCAL) && !(flag & O_NONBLOCK)) { 129651078Speter ++com->wopeners; 129751078Speter error = tsleep(TSA_CARR_ON(tp), TTIPRI | PCATCH, "siodcd", 0); 129851078Speter if (com_addr(unit) == NULL) 129951078Speter return (ENXIO); 130051078Speter --com->wopeners; 130151078Speter if (error != 0 || com->gone) 130251078Speter goto out; 130351078Speter goto open_top; 130451078Speter } 130551078Speter error = (*linesw[tp->t_line].l_open)(dev, tp); 130651078Speter disc_optim(tp, &tp->t_termios, com); 130751078Speter if (tp->t_state & TS_ISOPEN && mynor & CALLOUT_MASK) 130851078Speter com->active_out = TRUE; 130951078Speter siosettimeout(); 131051078Speterout: 131151078Speter splx(s); 131251078Speter if (!(tp->t_state & TS_ISOPEN) && com->wopeners == 0) 131351078Speter comhardclose(com); 131451078Speter return (error); 131551078Speter} 131651078Speter 131751078Speterstatic int 131851078Spetersioclose(dev, flag, mode, p) 131951078Speter dev_t dev; 132051078Speter int flag; 132151078Speter int mode; 132251078Speter struct proc *p; 132351078Speter{ 132451078Speter struct com_s *com; 132551078Speter int mynor; 132651078Speter int s; 132751078Speter struct tty *tp; 132851078Speter 132951078Speter mynor = minor(dev); 133051078Speter if (mynor & CONTROL_MASK) 133151078Speter return (0); 133251078Speter com = com_addr(MINOR_TO_UNIT(mynor)); 133351078Speter tp = com->tp; 133451078Speter s = spltty(); 133551078Speter (*linesw[tp->t_line].l_close)(tp, flag); 133651078Speter disc_optim(tp, &tp->t_termios, com); 133751654Sphk comstop(tp, FREAD | FWRITE); 133851078Speter comhardclose(com); 133951078Speter ttyclose(tp); 134051078Speter siosettimeout(); 134151078Speter splx(s); 134251078Speter if (com->gone) { 134351078Speter printf("sio%d: gone\n", com->unit); 134451078Speter s = spltty(); 134551078Speter if (com->ibuf != NULL) 134651078Speter free(com->ibuf, M_DEVBUF); 134751078Speter bzero(tp, sizeof *tp); 134851078Speter free(com, M_DEVBUF); 134951078Speter splx(s); 135051078Speter } 135151078Speter return (0); 135251078Speter} 135351078Speter 135451078Speterstatic void 135551078Spetercomhardclose(com) 135651078Speter struct com_s *com; 135751078Speter{ 135851078Speter Port_t iobase; 135951078Speter int s; 136051078Speter struct tty *tp; 136151078Speter int unit; 136251078Speter 136351078Speter unit = com->unit; 136451078Speter iobase = com->iobase; 136551078Speter s = spltty(); 136651078Speter com->poll = FALSE; 136751078Speter com->poll_output = FALSE; 136851078Speter com->do_timestamp = FALSE; 136951078Speter com->do_dcd_timestamp = FALSE; 137051078Speter com->pps.ppsparam.mode = 0; 137151078Speter outb(iobase + com_cfcr, com->cfcr_image &= ~CFCR_SBREAK); 137251078Speter { 137351078Speter outb(iobase + com_ier, 0); 137451078Speter tp = com->tp; 137551078Speter if (tp->t_cflag & HUPCL 137651078Speter /* 137751078Speter * XXX we will miss any carrier drop between here and the 137851078Speter * next open. Perhaps we should watch DCD even when the 137951078Speter * port is closed; it is not sufficient to check it at 138051078Speter * the next open because it might go up and down while 138151078Speter * we're not watching. 138251078Speter */ 138351078Speter || (!com->active_out 138451078Speter && !(com->prev_modem_status & MSR_DCD) 138551078Speter && !(com->it_in.c_cflag & CLOCAL)) 138651078Speter || !(tp->t_state & TS_ISOPEN)) { 138751078Speter (void)commctl(com, TIOCM_DTR, DMBIC); 138851078Speter if (com->dtr_wait != 0 && !(com->state & CS_DTR_OFF)) { 138951078Speter timeout(siodtrwakeup, com, com->dtr_wait); 139051078Speter com->state |= CS_DTR_OFF; 139151078Speter } 139251078Speter } 139351078Speter } 139451078Speter if (com->hasfifo) { 139551078Speter /* 139651078Speter * Disable fifos so that they are off after controlled 139751078Speter * reboots. Some BIOSes fail to detect 16550s when the 139851078Speter * fifos are enabled. 139951078Speter */ 140051078Speter outb(iobase + com_fifo, 0); 140151078Speter } 140251078Speter com->active_out = FALSE; 140351078Speter wakeup(&com->active_out); 140451078Speter wakeup(TSA_CARR_ON(tp)); /* restart any wopeners */ 140551078Speter splx(s); 140651078Speter} 140751078Speter 140851078Speterstatic int 140951078Spetersioread(dev, uio, flag) 141051078Speter dev_t dev; 141151078Speter struct uio *uio; 141251078Speter int flag; 141351078Speter{ 141451078Speter int mynor; 141551078Speter struct com_s *com; 141651078Speter 141751078Speter mynor = minor(dev); 141851078Speter if (mynor & CONTROL_MASK) 141951078Speter return (ENODEV); 142051078Speter com = com_addr(MINOR_TO_UNIT(mynor)); 142151078Speter if (com->gone) 142251078Speter return (ENODEV); 142351078Speter return ((*linesw[com->tp->t_line].l_read)(com->tp, uio, flag)); 142451078Speter} 142551078Speter 142651078Speterstatic int 142751078Spetersiowrite(dev, uio, flag) 142851078Speter dev_t dev; 142951078Speter struct uio *uio; 143051078Speter int flag; 143151078Speter{ 143251078Speter int mynor; 143351078Speter struct com_s *com; 143451078Speter int unit; 143551078Speter 143651078Speter mynor = minor(dev); 143751078Speter if (mynor & CONTROL_MASK) 143851078Speter return (ENODEV); 143951078Speter 144051078Speter unit = MINOR_TO_UNIT(mynor); 144151078Speter com = com_addr(unit); 144251078Speter if (com->gone) 144351078Speter return (ENODEV); 144451078Speter /* 144551078Speter * (XXX) We disallow virtual consoles if the physical console is 144651078Speter * a serial port. This is in case there is a display attached that 144751078Speter * is not the console. In that situation we don't need/want the X 144851078Speter * server taking over the console. 144951078Speter */ 145051078Speter if (constty != NULL && unit == comconsole) 145151078Speter constty = NULL; 145251078Speter return ((*linesw[com->tp->t_line].l_write)(com->tp, uio, flag)); 145351078Speter} 145451078Speter 145551078Speterstatic void 145651078Spetersiobusycheck(chan) 145751078Speter void *chan; 145851078Speter{ 145951078Speter struct com_s *com; 146051078Speter int s; 146151078Speter 146251078Speter com = (struct com_s *)chan; 146351078Speter 146451078Speter /* 146551078Speter * Clear TS_BUSY if low-level output is complete. 146651078Speter * spl locking is sufficient because siointr1() does not set CS_BUSY. 146751078Speter * If siointr1() clears CS_BUSY after we look at it, then we'll get 146851078Speter * called again. Reading the line status port outside of siointr1() 146951078Speter * is safe because CS_BUSY is clear so there are no output interrupts 147051078Speter * to lose. 147151078Speter */ 147251078Speter s = spltty(); 147351078Speter if (com->state & CS_BUSY) 147451078Speter com->extra_state &= ~CSE_BUSYCHECK; /* False alarm. */ 147551078Speter else if ((inb(com->line_status_port) & (LSR_TSRE | LSR_TXRDY)) 147651078Speter == (LSR_TSRE | LSR_TXRDY)) { 147751078Speter com->tp->t_state &= ~TS_BUSY; 147851078Speter ttwwakeup(com->tp); 147951078Speter com->extra_state &= ~CSE_BUSYCHECK; 148051078Speter } else 148151078Speter timeout(siobusycheck, com, hz / 100); 148251078Speter splx(s); 148351078Speter} 148451078Speter 148551078Speterstatic void 148651078Spetersiodtrwakeup(chan) 148751078Speter void *chan; 148851078Speter{ 148951078Speter struct com_s *com; 149051078Speter 149151078Speter com = (struct com_s *)chan; 149251078Speter com->state &= ~CS_DTR_OFF; 149351078Speter wakeup(&com->dtr_wait); 149451078Speter} 149551078Speter 149651078Speterstatic void 149751078Spetersioinput(com) 149851078Speter struct com_s *com; 149951078Speter{ 150051078Speter u_char *buf; 150151078Speter int incc; 150251078Speter u_char line_status; 150351078Speter int recv_data; 150451078Speter struct tty *tp; 150551078Speter 150651078Speter buf = com->ibuf; 150751078Speter tp = com->tp; 150851078Speter if (!(tp->t_state & TS_ISOPEN) || !(tp->t_cflag & CREAD)) { 150951078Speter com_events -= (com->iptr - com->ibuf); 151051078Speter com->iptr = com->ibuf; 151151078Speter return; 151251078Speter } 151351078Speter if (tp->t_state & TS_CAN_BYPASS_L_RINT) { 151451078Speter /* 151551078Speter * Avoid the grotesquely inefficient lineswitch routine 151651078Speter * (ttyinput) in "raw" mode. It usually takes about 450 151751078Speter * instructions (that's without canonical processing or echo!). 151851078Speter * slinput is reasonably fast (usually 40 instructions plus 151951078Speter * call overhead). 152051078Speter */ 152151078Speter do { 152251078Speter enable_intr(); 152351078Speter incc = com->iptr - buf; 152451078Speter if (tp->t_rawq.c_cc + incc > tp->t_ihiwat 152551078Speter && (com->state & CS_RTS_IFLOW 152651078Speter || tp->t_iflag & IXOFF) 152751078Speter && !(tp->t_state & TS_TBLOCK)) 152851078Speter ttyblock(tp); 152951078Speter com->delta_error_counts[CE_TTY_BUF_OVERFLOW] 153051078Speter += b_to_q((char *)buf, incc, &tp->t_rawq); 153151078Speter buf += incc; 153251078Speter tk_nin += incc; 153351078Speter tk_rawcc += incc; 153451078Speter tp->t_rawcc += incc; 153551078Speter ttwakeup(tp); 153651078Speter if (tp->t_state & TS_TTSTOP 153751078Speter && (tp->t_iflag & IXANY 153851078Speter || tp->t_cc[VSTART] == tp->t_cc[VSTOP])) { 153951078Speter tp->t_state &= ~TS_TTSTOP; 154051078Speter tp->t_lflag &= ~FLUSHO; 154151078Speter comstart(tp); 154251078Speter } 154351078Speter disable_intr(); 154451078Speter } while (buf < com->iptr); 154551078Speter } else { 154651078Speter do { 154751078Speter enable_intr(); 154851078Speter line_status = buf[com->ierroff]; 154951078Speter recv_data = *buf++; 155051078Speter if (line_status 155151078Speter & (LSR_BI | LSR_FE | LSR_OE | LSR_PE)) { 155251078Speter if (line_status & LSR_BI) 155351078Speter recv_data |= TTY_BI; 155451078Speter if (line_status & LSR_FE) 155551078Speter recv_data |= TTY_FE; 155651078Speter if (line_status & LSR_OE) 155751078Speter recv_data |= TTY_OE; 155851078Speter if (line_status & LSR_PE) 155951078Speter recv_data |= TTY_PE; 156051078Speter } 156151078Speter (*linesw[tp->t_line].l_rint)(recv_data, tp); 156251078Speter disable_intr(); 156351078Speter } while (buf < com->iptr); 156451078Speter } 156551078Speter com_events -= (com->iptr - com->ibuf); 156651078Speter com->iptr = com->ibuf; 156751078Speter 156851078Speter /* 156951078Speter * There is now room for another low-level buffer full of input, 157051078Speter * so enable RTS if it is now disabled and there is room in the 157151078Speter * high-level buffer. 157251078Speter */ 157351078Speter if ((com->state & CS_RTS_IFLOW) && !(com->mcr_image & MCR_RTS) && 157451078Speter !(tp->t_state & TS_TBLOCK)) 157551078Speter outb(com->modem_ctl_port, com->mcr_image |= MCR_RTS); 157651078Speter} 157751078Speter 157851078Spetervoid 157951078Spetersiointr(arg) 158051078Speter void *arg; 158151078Speter{ 158251078Speter#ifndef COM_MULTIPORT 158351078Speter COM_LOCK(); 158451078Speter siointr1((struct com_s *) arg); 158551078Speter COM_UNLOCK(); 158651078Speter#else /* COM_MULTIPORT */ 158751078Speter bool_t possibly_more_intrs; 158851078Speter int unit; 158951078Speter struct com_s *com; 159051078Speter 159151078Speter /* 159251078Speter * Loop until there is no activity on any port. This is necessary 159351078Speter * to get an interrupt edge more than to avoid another interrupt. 159451078Speter * If the IRQ signal is just an OR of the IRQ signals from several 159551078Speter * devices, then the edge from one may be lost because another is 159651078Speter * on. 159751078Speter */ 159851078Speter COM_LOCK(); 159951078Speter do { 160051078Speter possibly_more_intrs = FALSE; 160151078Speter for (unit = 0; unit < NSIOTOT; ++unit) { 160251078Speter com = com_addr(unit); 160351078Speter /* 160451078Speter * XXX COM_LOCK(); 160551078Speter * would it work here, or be counter-productive? 160651078Speter */ 160751078Speter if (com != NULL 160851078Speter && !com->gone 160951078Speter && (inb(com->int_id_port) & IIR_IMASK) 161051078Speter != IIR_NOPEND) { 161151078Speter siointr1(com); 161251078Speter possibly_more_intrs = TRUE; 161351078Speter } 161451078Speter /* XXX COM_UNLOCK(); */ 161551078Speter } 161651078Speter } while (possibly_more_intrs); 161751078Speter COM_UNLOCK(); 161851078Speter#endif /* COM_MULTIPORT */ 161951078Speter} 162051078Speter 162151078Speterstatic void 162251078Spetersiointr1(com) 162351078Speter struct com_s *com; 162451078Speter{ 162551078Speter u_char line_status; 162651078Speter u_char modem_status; 162751078Speter u_char *ioptr; 162851078Speter u_char recv_data; 162951078Speter u_char int_ctl; 163051078Speter u_char int_ctl_new; 163151078Speter struct timecounter *tc; 163251078Speter u_int count; 163351078Speter 163451078Speter int_ctl = inb(com->intr_ctl_port); 163551078Speter int_ctl_new = int_ctl; 163651078Speter 163751078Speter while (!com->gone) { 163851078Speter if (com->pps.ppsparam.mode & PPS_CAPTUREBOTH) { 163951078Speter modem_status = inb(com->modem_status_port); 164051078Speter if ((modem_status ^ com->last_modem_status) & MSR_DCD) { 164151078Speter tc = timecounter; 164251078Speter count = tc->tc_get_timecount(tc); 164351078Speter pps_event(&com->pps, tc, count, 164451078Speter (modem_status & MSR_DCD) ? 164551078Speter PPS_CAPTUREASSERT : PPS_CAPTURECLEAR); 164651078Speter } 164751078Speter } 164851078Speter line_status = inb(com->line_status_port); 164951078Speter 165051078Speter /* input event? (check first to help avoid overruns) */ 165151078Speter while (line_status & LSR_RCV_MASK) { 165251078Speter /* break/unnattached error bits or real input? */ 165351078Speter if (!(line_status & LSR_RXRDY)) 165451078Speter recv_data = 0; 165551078Speter else 165651078Speter recv_data = inb(com->data_port); 165751078Speter if (line_status & (LSR_BI | LSR_FE | LSR_PE)) { 165851078Speter /* 165951078Speter * Don't store BI if IGNBRK or FE/PE if IGNPAR. 166051078Speter * Otherwise, push the work to a higher level 166151078Speter * (to handle PARMRK) if we're bypassing. 166251078Speter * Otherwise, convert BI/FE and PE+INPCK to 0. 166351078Speter * 166451078Speter * This makes bypassing work right in the 166551078Speter * usual "raw" case (IGNBRK set, and IGNPAR 166651078Speter * and INPCK clear). 166751078Speter * 166851078Speter * Note: BI together with FE/PE means just BI. 166951078Speter */ 167051078Speter if (line_status & LSR_BI) { 167151078Speter#if defined(DDB) && defined(BREAK_TO_DEBUGGER) 167251078Speter if (com->unit == comconsole) { 167351078Speter breakpoint(); 167451078Speter goto cont; 167551078Speter } 167651078Speter#endif 167751078Speter if (com->tp == NULL 167851078Speter || com->tp->t_iflag & IGNBRK) 167951078Speter goto cont; 168051078Speter } else { 168151078Speter if (com->tp == NULL 168251078Speter || com->tp->t_iflag & IGNPAR) 168351078Speter goto cont; 168451078Speter } 168551078Speter if (com->tp->t_state & TS_CAN_BYPASS_L_RINT 168651078Speter && (line_status & (LSR_BI | LSR_FE) 168751078Speter || com->tp->t_iflag & INPCK)) 168851078Speter recv_data = 0; 168951078Speter } 169051078Speter ++com->bytes_in; 169151078Speter if (com->hotchar != 0 && recv_data == com->hotchar) 169251078Speter setsofttty(); 169351078Speter ioptr = com->iptr; 169451078Speter if (ioptr >= com->ibufend) 169551078Speter CE_RECORD(com, CE_INTERRUPT_BUF_OVERFLOW); 169651078Speter else { 169751078Speter if (com->do_timestamp) 169851078Speter microtime(&com->timestamp); 169951078Speter ++com_events; 170051078Speter schedsofttty(); 170151078Speter#if 0 /* for testing input latency vs efficiency */ 170251078Speterif (com->iptr - com->ibuf == 8) 170351078Speter setsofttty(); 170451078Speter#endif 170551078Speter ioptr[0] = recv_data; 170651078Speter ioptr[com->ierroff] = line_status; 170751078Speter com->iptr = ++ioptr; 170851078Speter if (ioptr == com->ihighwater 170951078Speter && com->state & CS_RTS_IFLOW) 171051078Speter outb(com->modem_ctl_port, 171151078Speter com->mcr_image &= ~MCR_RTS); 171251078Speter if (line_status & LSR_OE) 171351078Speter CE_RECORD(com, CE_OVERRUN); 171451078Speter } 171551078Spetercont: 171651078Speter /* 171751078Speter * "& 0x7F" is to avoid the gcc-1.40 generating a slow 171851078Speter * jump from the top of the loop to here 171951078Speter */ 172051078Speter line_status = inb(com->line_status_port) & 0x7F; 172151078Speter } 172251078Speter 172351078Speter /* modem status change? (always check before doing output) */ 172451078Speter modem_status = inb(com->modem_status_port); 172551078Speter if (modem_status != com->last_modem_status) { 172651078Speter if (com->do_dcd_timestamp 172751078Speter && !(com->last_modem_status & MSR_DCD) 172851078Speter && modem_status & MSR_DCD) 172951078Speter microtime(&com->dcd_timestamp); 173051078Speter 173151078Speter /* 173251078Speter * Schedule high level to handle DCD changes. Note 173351078Speter * that we don't use the delta bits anywhere. Some 173451078Speter * UARTs mess them up, and it's easy to remember the 173551078Speter * previous bits and calculate the delta. 173651078Speter */ 173751078Speter com->last_modem_status = modem_status; 173851078Speter if (!(com->state & CS_CHECKMSR)) { 173951078Speter com_events += LOTS_OF_EVENTS; 174051078Speter com->state |= CS_CHECKMSR; 174151078Speter setsofttty(); 174251078Speter } 174351078Speter 174451078Speter /* handle CTS change immediately for crisp flow ctl */ 174551078Speter if (com->state & CS_CTS_OFLOW) { 174651078Speter if (modem_status & MSR_CTS) 174751078Speter com->state |= CS_ODEVREADY; 174851078Speter else 174951078Speter com->state &= ~CS_ODEVREADY; 175051078Speter } 175151078Speter } 175251078Speter 175351078Speter /* output queued and everything ready? */ 175451078Speter if (line_status & LSR_TXRDY 175551078Speter && com->state >= (CS_BUSY | CS_TTGO | CS_ODEVREADY)) { 175651078Speter ioptr = com->obufq.l_head; 175751078Speter if (com->tx_fifo_size > 1) { 175851078Speter u_int ocount; 175951078Speter 176051078Speter ocount = com->obufq.l_tail - ioptr; 176151078Speter if (ocount > com->tx_fifo_size) 176251078Speter ocount = com->tx_fifo_size; 176351078Speter com->bytes_out += ocount; 176451078Speter do 176551078Speter outb(com->data_port, *ioptr++); 176651078Speter while (--ocount != 0); 176751078Speter } else { 176851078Speter outb(com->data_port, *ioptr++); 176951078Speter ++com->bytes_out; 177051078Speter } 177151078Speter com->obufq.l_head = ioptr; 177251078Speter if (COM_IIR_TXRDYBUG(com->flags)) { 177351078Speter int_ctl_new = int_ctl | IER_ETXRDY; 177451078Speter } 177551078Speter if (ioptr >= com->obufq.l_tail) { 177651078Speter struct lbq *qp; 177751078Speter 177851078Speter qp = com->obufq.l_next; 177951078Speter qp->l_queued = FALSE; 178051078Speter qp = qp->l_next; 178151078Speter if (qp != NULL) { 178251078Speter com->obufq.l_head = qp->l_head; 178351078Speter com->obufq.l_tail = qp->l_tail; 178451078Speter com->obufq.l_next = qp; 178551078Speter } else { 178651078Speter /* output just completed */ 178751078Speter if ( COM_IIR_TXRDYBUG(com->flags) ) { 178851078Speter int_ctl_new = int_ctl & ~IER_ETXRDY; 178951078Speter } 179051078Speter com->state &= ~CS_BUSY; 179151078Speter } 179251078Speter if (!(com->state & CS_ODONE)) { 179351078Speter com_events += LOTS_OF_EVENTS; 179451078Speter com->state |= CS_ODONE; 179551078Speter setsofttty(); /* handle at high level ASAP */ 179651078Speter } 179751078Speter } 179851078Speter if ( COM_IIR_TXRDYBUG(com->flags) && (int_ctl != int_ctl_new)) { 179951078Speter outb(com->intr_ctl_port, int_ctl_new); 180051078Speter } 180151078Speter } 180251078Speter 180351078Speter /* finished? */ 180451078Speter#ifndef COM_MULTIPORT 180551078Speter if ((inb(com->int_id_port) & IIR_IMASK) == IIR_NOPEND) 180651078Speter#endif /* COM_MULTIPORT */ 180751078Speter return; 180851078Speter } 180951078Speter} 181051078Speter 181151078Speterstatic int 181251078Spetersioioctl(dev, cmd, data, flag, p) 181351078Speter dev_t dev; 181451078Speter u_long cmd; 181551078Speter caddr_t data; 181651078Speter int flag; 181751078Speter struct proc *p; 181851078Speter{ 181951078Speter struct com_s *com; 182051078Speter int error; 182151078Speter Port_t iobase; 182251078Speter int mynor; 182351078Speter int s; 182451078Speter struct tty *tp; 182551078Speter#if defined(COMPAT_43) || defined(COMPAT_SUNOS) 182651078Speter u_long oldcmd; 182751078Speter struct termios term; 182851078Speter#endif 182951078Speter 183051078Speter mynor = minor(dev); 183151078Speter com = com_addr(MINOR_TO_UNIT(mynor)); 183251078Speter if (com->gone) 183351078Speter return (ENODEV); 183451078Speter iobase = com->iobase; 183551078Speter if (mynor & CONTROL_MASK) { 183651078Speter struct termios *ct; 183751078Speter 183851078Speter switch (mynor & CONTROL_MASK) { 183951078Speter case CONTROL_INIT_STATE: 184051078Speter ct = mynor & CALLOUT_MASK ? &com->it_out : &com->it_in; 184151078Speter break; 184251078Speter case CONTROL_LOCK_STATE: 184351078Speter ct = mynor & CALLOUT_MASK ? &com->lt_out : &com->lt_in; 184451078Speter break; 184551078Speter default: 184651078Speter return (ENODEV); /* /dev/nodev */ 184751078Speter } 184851078Speter switch (cmd) { 184951078Speter case TIOCSETA: 185051078Speter error = suser(p); 185151078Speter if (error != 0) 185251078Speter return (error); 185351078Speter *ct = *(struct termios *)data; 185451078Speter return (0); 185551078Speter case TIOCGETA: 185651078Speter *(struct termios *)data = *ct; 185751078Speter return (0); 185851078Speter case TIOCGETD: 185951078Speter *(int *)data = TTYDISC; 186051078Speter return (0); 186151078Speter case TIOCGWINSZ: 186251078Speter bzero(data, sizeof(struct winsize)); 186351078Speter return (0); 186451078Speter default: 186551078Speter return (ENOTTY); 186651078Speter } 186751078Speter } 186851078Speter tp = com->tp; 186951078Speter#if defined(COMPAT_43) || defined(COMPAT_SUNOS) 187051078Speter term = tp->t_termios; 187151078Speter oldcmd = cmd; 187251078Speter error = ttsetcompat(tp, &cmd, data, &term); 187351078Speter if (error != 0) 187451078Speter return (error); 187551078Speter if (cmd != oldcmd) 187651078Speter data = (caddr_t)&term; 187751078Speter#endif 187851078Speter if (cmd == TIOCSETA || cmd == TIOCSETAW || cmd == TIOCSETAF) { 187951078Speter int cc; 188051078Speter struct termios *dt = (struct termios *)data; 188151078Speter struct termios *lt = mynor & CALLOUT_MASK 188251078Speter ? &com->lt_out : &com->lt_in; 188351078Speter 188451078Speter dt->c_iflag = (tp->t_iflag & lt->c_iflag) 188551078Speter | (dt->c_iflag & ~lt->c_iflag); 188651078Speter dt->c_oflag = (tp->t_oflag & lt->c_oflag) 188751078Speter | (dt->c_oflag & ~lt->c_oflag); 188851078Speter dt->c_cflag = (tp->t_cflag & lt->c_cflag) 188951078Speter | (dt->c_cflag & ~lt->c_cflag); 189051078Speter dt->c_lflag = (tp->t_lflag & lt->c_lflag) 189151078Speter | (dt->c_lflag & ~lt->c_lflag); 189251078Speter for (cc = 0; cc < NCCS; ++cc) 189351078Speter if (lt->c_cc[cc] != 0) 189451078Speter dt->c_cc[cc] = tp->t_cc[cc]; 189551078Speter if (lt->c_ispeed != 0) 189651078Speter dt->c_ispeed = tp->t_ispeed; 189751078Speter if (lt->c_ospeed != 0) 189851078Speter dt->c_ospeed = tp->t_ospeed; 189951078Speter } 190051078Speter error = (*linesw[tp->t_line].l_ioctl)(tp, cmd, data, flag, p); 190151078Speter if (error != ENOIOCTL) 190251078Speter return (error); 190351078Speter s = spltty(); 190451078Speter error = ttioctl(tp, cmd, data, flag); 190551078Speter disc_optim(tp, &tp->t_termios, com); 190651078Speter if (error != ENOIOCTL) { 190751078Speter splx(s); 190851078Speter return (error); 190951078Speter } 191051078Speter switch (cmd) { 191151078Speter case TIOCSBRK: 191251078Speter outb(iobase + com_cfcr, com->cfcr_image |= CFCR_SBREAK); 191351078Speter break; 191451078Speter case TIOCCBRK: 191551078Speter outb(iobase + com_cfcr, com->cfcr_image &= ~CFCR_SBREAK); 191651078Speter break; 191751078Speter case TIOCSDTR: 191851078Speter (void)commctl(com, TIOCM_DTR, DMBIS); 191951078Speter break; 192051078Speter case TIOCCDTR: 192151078Speter (void)commctl(com, TIOCM_DTR, DMBIC); 192251078Speter break; 192351078Speter /* 192451078Speter * XXX should disallow changing MCR_RTS if CS_RTS_IFLOW is set. The 192551078Speter * changes get undone on the next call to comparam(). 192651078Speter */ 192751078Speter case TIOCMSET: 192851078Speter (void)commctl(com, *(int *)data, DMSET); 192951078Speter break; 193051078Speter case TIOCMBIS: 193151078Speter (void)commctl(com, *(int *)data, DMBIS); 193251078Speter break; 193351078Speter case TIOCMBIC: 193451078Speter (void)commctl(com, *(int *)data, DMBIC); 193551078Speter break; 193651078Speter case TIOCMGET: 193751078Speter *(int *)data = commctl(com, 0, DMGET); 193851078Speter break; 193951078Speter case TIOCMSDTRWAIT: 194051078Speter /* must be root since the wait applies to following logins */ 194151078Speter error = suser(p); 194251078Speter if (error != 0) { 194351078Speter splx(s); 194451078Speter return (error); 194551078Speter } 194651078Speter com->dtr_wait = *(int *)data * hz / 100; 194751078Speter break; 194851078Speter case TIOCMGDTRWAIT: 194951078Speter *(int *)data = com->dtr_wait * 100 / hz; 195051078Speter break; 195151078Speter case TIOCTIMESTAMP: 195251078Speter com->do_timestamp = TRUE; 195351078Speter *(struct timeval *)data = com->timestamp; 195451078Speter break; 195551078Speter case TIOCDCDTIMESTAMP: 195651078Speter com->do_dcd_timestamp = TRUE; 195751078Speter *(struct timeval *)data = com->dcd_timestamp; 195851078Speter break; 195951078Speter default: 196051078Speter splx(s); 196151078Speter error = pps_ioctl(cmd, data, &com->pps); 196251078Speter if (error == ENODEV) 196351078Speter error = ENOTTY; 196451078Speter return (error); 196551078Speter } 196651078Speter splx(s); 196751078Speter return (0); 196851078Speter} 196951078Speter 197051078Speterstatic void 197151078Spetersiopoll() 197251078Speter{ 197351078Speter int unit; 197451078Speter 197551078Speter if (com_events == 0) 197651078Speter return; 197751078Speterrepeat: 197851078Speter for (unit = 0; unit < NSIOTOT; ++unit) { 197951078Speter struct com_s *com; 198051078Speter int incc; 198151078Speter struct tty *tp; 198251078Speter 198351078Speter com = com_addr(unit); 198451078Speter if (com == NULL) 198551078Speter continue; 198651078Speter tp = com->tp; 198751078Speter if (tp == NULL || com->gone) { 198851078Speter /* 198951078Speter * Discard any events related to never-opened or 199051078Speter * going-away devices. 199151078Speter */ 199251078Speter disable_intr(); 199351078Speter incc = com->iptr - com->ibuf; 199451078Speter com->iptr = com->ibuf; 199551078Speter if (com->state & CS_CHECKMSR) { 199651078Speter incc += LOTS_OF_EVENTS; 199751078Speter com->state &= ~CS_CHECKMSR; 199851078Speter } 199951078Speter com_events -= incc; 200051078Speter enable_intr(); 200151078Speter continue; 200251078Speter } 200351078Speter if (com->iptr != com->ibuf) { 200451078Speter disable_intr(); 200551078Speter sioinput(com); 200651078Speter enable_intr(); 200751078Speter } 200851078Speter if (com->state & CS_CHECKMSR) { 200951078Speter u_char delta_modem_status; 201051078Speter 201151078Speter disable_intr(); 201251078Speter delta_modem_status = com->last_modem_status 201351078Speter ^ com->prev_modem_status; 201451078Speter com->prev_modem_status = com->last_modem_status; 201551078Speter com_events -= LOTS_OF_EVENTS; 201651078Speter com->state &= ~CS_CHECKMSR; 201751078Speter enable_intr(); 201851078Speter if (delta_modem_status & MSR_DCD) 201951078Speter (*linesw[tp->t_line].l_modem) 202051078Speter (tp, com->prev_modem_status & MSR_DCD); 202151078Speter } 202251078Speter if (com->state & CS_ODONE) { 202351078Speter disable_intr(); 202451078Speter com_events -= LOTS_OF_EVENTS; 202551078Speter com->state &= ~CS_ODONE; 202651078Speter enable_intr(); 202751078Speter if (!(com->state & CS_BUSY) 202851078Speter && !(com->extra_state & CSE_BUSYCHECK)) { 202951078Speter timeout(siobusycheck, com, hz / 100); 203051078Speter com->extra_state |= CSE_BUSYCHECK; 203151078Speter } 203251078Speter (*linesw[tp->t_line].l_start)(tp); 203351078Speter } 203451078Speter if (com_events == 0) 203551078Speter break; 203651078Speter } 203751078Speter if (com_events >= LOTS_OF_EVENTS) 203851078Speter goto repeat; 203951078Speter} 204051078Speter 204151078Speterstatic int 204251078Spetercomparam(tp, t) 204351078Speter struct tty *tp; 204451078Speter struct termios *t; 204551078Speter{ 204651078Speter u_int cfcr; 204751078Speter int cflag; 204851078Speter struct com_s *com; 204951078Speter int divisor; 205051078Speter u_char dlbh; 205151078Speter u_char dlbl; 205251078Speter Port_t iobase; 205351078Speter int s; 205451078Speter int unit; 205551078Speter 205651078Speter /* do historical conversions */ 205751078Speter if (t->c_ispeed == 0) 205851078Speter t->c_ispeed = t->c_ospeed; 205951078Speter 206051078Speter /* check requested parameters */ 206151078Speter divisor = ttspeedtab(t->c_ospeed, comspeedtab); 206251078Speter if (divisor < 0 || (divisor > 0 && t->c_ispeed != t->c_ospeed)) 206351078Speter return (EINVAL); 206451078Speter 206551078Speter /* parameters are OK, convert them to the com struct and the device */ 206651078Speter unit = DEV_TO_UNIT(tp->t_dev); 206751078Speter com = com_addr(unit); 206851078Speter iobase = com->iobase; 206951078Speter s = spltty(); 207051078Speter if (divisor == 0) 207151078Speter (void)commctl(com, TIOCM_DTR, DMBIC); /* hang up line */ 207251078Speter else 207351078Speter (void)commctl(com, TIOCM_DTR, DMBIS); 207451078Speter cflag = t->c_cflag; 207551078Speter switch (cflag & CSIZE) { 207651078Speter case CS5: 207751078Speter cfcr = CFCR_5BITS; 207851078Speter break; 207951078Speter case CS6: 208051078Speter cfcr = CFCR_6BITS; 208151078Speter break; 208251078Speter case CS7: 208351078Speter cfcr = CFCR_7BITS; 208451078Speter break; 208551078Speter default: 208651078Speter cfcr = CFCR_8BITS; 208751078Speter break; 208851078Speter } 208951078Speter if (cflag & PARENB) { 209051078Speter cfcr |= CFCR_PENAB; 209151078Speter if (!(cflag & PARODD)) 209251078Speter cfcr |= CFCR_PEVEN; 209351078Speter } 209451078Speter if (cflag & CSTOPB) 209551078Speter cfcr |= CFCR_STOPB; 209651078Speter 209751078Speter if (com->hasfifo && divisor != 0) { 209851078Speter /* 209951078Speter * Use a fifo trigger level low enough so that the input 210051078Speter * latency from the fifo is less than about 16 msec and 210151078Speter * the total latency is less than about 30 msec. These 210251078Speter * latencies are reasonable for humans. Serial comms 210351078Speter * protocols shouldn't expect anything better since modem 210451078Speter * latencies are larger. 210551078Speter */ 210651078Speter com->fifo_image = t->c_ospeed <= 4800 210751078Speter ? FIFO_ENABLE : FIFO_ENABLE | FIFO_RX_HIGH; 210851078Speter#ifdef COM_ESP 210951078Speter /* 211051078Speter * The Hayes ESP card needs the fifo DMA mode bit set 211151078Speter * in compatibility mode. If not, it will interrupt 211251078Speter * for each character received. 211351078Speter */ 211451078Speter if (com->esp) 211551078Speter com->fifo_image |= FIFO_DMA_MODE; 211651078Speter#endif 211751078Speter outb(iobase + com_fifo, com->fifo_image); 211851078Speter } 211951078Speter 212051078Speter /* 212151078Speter * This returns with interrupts disabled so that we can complete 212251078Speter * the speed change atomically. Keeping interrupts disabled is 212351078Speter * especially important while com_data is hidden. 212451078Speter */ 212551078Speter (void) siosetwater(com, t->c_ispeed); 212651078Speter 212751078Speter if (divisor != 0) { 212851078Speter outb(iobase + com_cfcr, cfcr | CFCR_DLAB); 212951078Speter /* 213051078Speter * Only set the divisor registers if they would change, 213151078Speter * since on some 16550 incompatibles (UMC8669F), setting 213251078Speter * them while input is arriving them loses sync until 213351078Speter * data stops arriving. 213451078Speter */ 213551078Speter dlbl = divisor & 0xFF; 213651078Speter if (inb(iobase + com_dlbl) != dlbl) 213751078Speter outb(iobase + com_dlbl, dlbl); 213851078Speter dlbh = (u_int) divisor >> 8; 213951078Speter if (inb(iobase + com_dlbh) != dlbh) 214051078Speter outb(iobase + com_dlbh, dlbh); 214151078Speter } 214251078Speter 214351078Speter 214451078Speter outb(iobase + com_cfcr, com->cfcr_image = cfcr); 214551078Speter 214651078Speter if (!(tp->t_state & TS_TTSTOP)) 214751078Speter com->state |= CS_TTGO; 214851078Speter 214951078Speter if (cflag & CRTS_IFLOW) { 215051078Speter if (com->st16650a) { 215151078Speter outb(iobase + com_cfcr, 0xbf); 215251078Speter outb(iobase + com_fifo, inb(iobase + com_fifo) | 0x40); 215351078Speter } 215451078Speter com->state |= CS_RTS_IFLOW; 215551078Speter /* 215651078Speter * If CS_RTS_IFLOW just changed from off to on, the change 215751078Speter * needs to be propagated to MCR_RTS. This isn't urgent, 215851078Speter * so do it later by calling comstart() instead of repeating 215951078Speter * a lot of code from comstart() here. 216051078Speter */ 216151078Speter } else if (com->state & CS_RTS_IFLOW) { 216251078Speter com->state &= ~CS_RTS_IFLOW; 216351078Speter /* 216451078Speter * CS_RTS_IFLOW just changed from on to off. Force MCR_RTS 216551078Speter * on here, since comstart() won't do it later. 216651078Speter */ 216751078Speter outb(com->modem_ctl_port, com->mcr_image |= MCR_RTS); 216851078Speter if (com->st16650a) { 216951078Speter outb(iobase + com_cfcr, 0xbf); 217051078Speter outb(iobase + com_fifo, inb(iobase + com_fifo) & ~0x40); 217151078Speter } 217251078Speter } 217351078Speter 217451078Speter 217551078Speter /* 217651078Speter * Set up state to handle output flow control. 217751078Speter * XXX - worth handling MDMBUF (DCD) flow control at the lowest level? 217851078Speter * Now has 10+ msec latency, while CTS flow has 50- usec latency. 217951078Speter */ 218051078Speter com->state |= CS_ODEVREADY; 218151078Speter com->state &= ~CS_CTS_OFLOW; 218251078Speter if (cflag & CCTS_OFLOW) { 218351078Speter com->state |= CS_CTS_OFLOW; 218451078Speter if (!(com->last_modem_status & MSR_CTS)) 218551078Speter com->state &= ~CS_ODEVREADY; 218651078Speter if (com->st16650a) { 218751078Speter outb(iobase + com_cfcr, 0xbf); 218851078Speter outb(iobase + com_fifo, inb(iobase + com_fifo) | 0x80); 218951078Speter } 219051078Speter } else { 219151078Speter if (com->st16650a) { 219251078Speter outb(iobase + com_cfcr, 0xbf); 219351078Speter outb(iobase + com_fifo, inb(iobase + com_fifo) & ~0x80); 219451078Speter } 219551078Speter } 219651078Speter 219751078Speter 219851078Speter outb(iobase + com_cfcr, com->cfcr_image); 219951078Speter 220051078Speter 220151078Speter /* XXX shouldn't call functions while intrs are disabled. */ 220251078Speter disc_optim(tp, t, com); 220351078Speter /* 220451078Speter * Recover from fiddling with CS_TTGO. We used to call siointr1() 220551078Speter * unconditionally, but that defeated the careful discarding of 220651078Speter * stale input in sioopen(). 220751078Speter */ 220851078Speter if (com->state >= (CS_BUSY | CS_TTGO)) 220951078Speter siointr1(com); 221051078Speter 221151078Speter enable_intr(); 221251078Speter splx(s); 221351078Speter comstart(tp); 221451078Speter if (com->ibufold != NULL) { 221551078Speter free(com->ibufold, M_DEVBUF); 221651078Speter com->ibufold = NULL; 221751078Speter } 221851078Speter return (0); 221951078Speter} 222051078Speter 222151078Speterstatic int 222251078Spetersiosetwater(com, speed) 222351078Speter struct com_s *com; 222451078Speter speed_t speed; 222551078Speter{ 222651078Speter int cp4ticks; 222751078Speter u_char *ibuf; 222851078Speter int ibufsize; 222951078Speter struct tty *tp; 223051078Speter 223151078Speter /* 223251078Speter * Make the buffer size large enough to handle a softtty interrupt 223351078Speter * latency of about 2 ticks without loss of throughput or data 223451078Speter * (about 3 ticks if input flow control is not used or not honoured, 223551078Speter * but a bit less for CS5-CS7 modes). 223651078Speter */ 223751078Speter cp4ticks = speed / 10 / hz * 4; 223851078Speter for (ibufsize = 128; ibufsize < cp4ticks;) 223951078Speter ibufsize <<= 1; 224051078Speter if (ibufsize == com->ibufsize) { 224151078Speter disable_intr(); 224251078Speter return (0); 224351078Speter } 224451078Speter 224551078Speter /* 224651078Speter * Allocate input buffer. The extra factor of 2 in the size is 224751078Speter * to allow for an error byte for each input byte. 224851078Speter */ 224951078Speter ibuf = malloc(2 * ibufsize, M_DEVBUF, M_NOWAIT); 225051078Speter if (ibuf == NULL) { 225151078Speter disable_intr(); 225251078Speter return (ENOMEM); 225351078Speter } 225451078Speter 225551078Speter /* Initialize non-critical variables. */ 225651078Speter com->ibufold = com->ibuf; 225751078Speter com->ibufsize = ibufsize; 225851078Speter tp = com->tp; 225951078Speter if (tp != NULL) { 226051078Speter tp->t_ififosize = 2 * ibufsize; 226151078Speter tp->t_ispeedwat = (speed_t)-1; 226251078Speter tp->t_ospeedwat = (speed_t)-1; 226351078Speter } 226451078Speter 226551078Speter /* 226651078Speter * Read current input buffer, if any. Continue with interrupts 226751078Speter * disabled. 226851078Speter */ 226951078Speter disable_intr(); 227051078Speter if (com->iptr != com->ibuf) 227151078Speter sioinput(com); 227251078Speter 227351078Speter /*- 227451078Speter * Initialize critical variables, including input buffer watermarks. 227551078Speter * The external device is asked to stop sending when the buffer 227651078Speter * exactly reaches high water, or when the high level requests it. 227751078Speter * The high level is notified immediately (rather than at a later 227851078Speter * clock tick) when this watermark is reached. 227951078Speter * The buffer size is chosen so the watermark should almost never 228051078Speter * be reached. 228151078Speter * The low watermark is invisibly 0 since the buffer is always 228251078Speter * emptied all at once. 228351078Speter */ 228451078Speter com->iptr = com->ibuf = ibuf; 228551078Speter com->ibufend = ibuf + ibufsize; 228651078Speter com->ierroff = ibufsize; 228751078Speter com->ihighwater = ibuf + 3 * ibufsize / 4; 228851078Speter return (0); 228951078Speter} 229051078Speter 229151078Speterstatic void 229251078Spetercomstart(tp) 229351078Speter struct tty *tp; 229451078Speter{ 229551078Speter struct com_s *com; 229651078Speter int s; 229751078Speter int unit; 229851078Speter 229951078Speter unit = DEV_TO_UNIT(tp->t_dev); 230051078Speter com = com_addr(unit); 230151078Speter s = spltty(); 230251078Speter disable_intr(); 230351078Speter if (tp->t_state & TS_TTSTOP) 230451078Speter com->state &= ~CS_TTGO; 230551078Speter else 230651078Speter com->state |= CS_TTGO; 230751078Speter if (tp->t_state & TS_TBLOCK) { 230851078Speter if (com->mcr_image & MCR_RTS && com->state & CS_RTS_IFLOW) 230951078Speter outb(com->modem_ctl_port, com->mcr_image &= ~MCR_RTS); 231051078Speter } else { 231151078Speter if (!(com->mcr_image & MCR_RTS) && com->iptr < com->ihighwater 231251078Speter && com->state & CS_RTS_IFLOW) 231351078Speter outb(com->modem_ctl_port, com->mcr_image |= MCR_RTS); 231451078Speter } 231551078Speter enable_intr(); 231651078Speter if (tp->t_state & (TS_TIMEOUT | TS_TTSTOP)) { 231751078Speter ttwwakeup(tp); 231851078Speter splx(s); 231951078Speter return; 232051078Speter } 232151078Speter if (tp->t_outq.c_cc != 0) { 232251078Speter struct lbq *qp; 232351078Speter struct lbq *next; 232451078Speter 232551078Speter if (!com->obufs[0].l_queued) { 232651078Speter com->obufs[0].l_tail 232751078Speter = com->obuf1 + q_to_b(&tp->t_outq, com->obuf1, 232851078Speter sizeof com->obuf1); 232951078Speter com->obufs[0].l_next = NULL; 233051078Speter com->obufs[0].l_queued = TRUE; 233151078Speter disable_intr(); 233251078Speter if (com->state & CS_BUSY) { 233351078Speter qp = com->obufq.l_next; 233451078Speter while ((next = qp->l_next) != NULL) 233551078Speter qp = next; 233651078Speter qp->l_next = &com->obufs[0]; 233751078Speter } else { 233851078Speter com->obufq.l_head = com->obufs[0].l_head; 233951078Speter com->obufq.l_tail = com->obufs[0].l_tail; 234051078Speter com->obufq.l_next = &com->obufs[0]; 234151078Speter com->state |= CS_BUSY; 234251078Speter } 234351078Speter enable_intr(); 234451078Speter } 234551078Speter if (tp->t_outq.c_cc != 0 && !com->obufs[1].l_queued) { 234651078Speter com->obufs[1].l_tail 234751078Speter = com->obuf2 + q_to_b(&tp->t_outq, com->obuf2, 234851078Speter sizeof com->obuf2); 234951078Speter com->obufs[1].l_next = NULL; 235051078Speter com->obufs[1].l_queued = TRUE; 235151078Speter disable_intr(); 235251078Speter if (com->state & CS_BUSY) { 235351078Speter qp = com->obufq.l_next; 235451078Speter while ((next = qp->l_next) != NULL) 235551078Speter qp = next; 235651078Speter qp->l_next = &com->obufs[1]; 235751078Speter } else { 235851078Speter com->obufq.l_head = com->obufs[1].l_head; 235951078Speter com->obufq.l_tail = com->obufs[1].l_tail; 236051078Speter com->obufq.l_next = &com->obufs[1]; 236151078Speter com->state |= CS_BUSY; 236251078Speter } 236351078Speter enable_intr(); 236451078Speter } 236551078Speter tp->t_state |= TS_BUSY; 236651078Speter } 236751078Speter disable_intr(); 236851078Speter if (com->state >= (CS_BUSY | CS_TTGO)) 236951078Speter siointr1(com); /* fake interrupt to start output */ 237051078Speter enable_intr(); 237151078Speter ttwwakeup(tp); 237251078Speter splx(s); 237351078Speter} 237451078Speter 237551078Speterstatic void 237651654Sphkcomstop(tp, rw) 237751078Speter struct tty *tp; 237851078Speter int rw; 237951078Speter{ 238051078Speter struct com_s *com; 238151078Speter 238251078Speter com = com_addr(DEV_TO_UNIT(tp->t_dev)); 238351078Speter if (com->gone) 238451078Speter return; 238551078Speter disable_intr(); 238651078Speter if (rw & FWRITE) { 238751078Speter if (com->hasfifo) 238851078Speter#ifdef COM_ESP 238951078Speter /* XXX avoid h/w bug. */ 239051078Speter if (!com->esp) 239151078Speter#endif 239251078Speter outb(com->iobase + com_fifo, 239351078Speter FIFO_XMT_RST | com->fifo_image); 239451078Speter com->obufs[0].l_queued = FALSE; 239551078Speter com->obufs[1].l_queued = FALSE; 239651078Speter if (com->state & CS_ODONE) 239751078Speter com_events -= LOTS_OF_EVENTS; 239851078Speter com->state &= ~(CS_ODONE | CS_BUSY); 239951078Speter com->tp->t_state &= ~TS_BUSY; 240051078Speter } 240151078Speter if (rw & FREAD) { 240251078Speter if (com->hasfifo) 240351078Speter#ifdef COM_ESP 240451078Speter /* XXX avoid h/w bug. */ 240551078Speter if (!com->esp) 240651078Speter#endif 240751078Speter outb(com->iobase + com_fifo, 240851078Speter FIFO_RCV_RST | com->fifo_image); 240951078Speter com_events -= (com->iptr - com->ibuf); 241051078Speter com->iptr = com->ibuf; 241151078Speter } 241251078Speter enable_intr(); 241351078Speter comstart(tp); 241451078Speter} 241551078Speter 241651078Speterstatic int 241751078Spetercommctl(com, bits, how) 241851078Speter struct com_s *com; 241951078Speter int bits; 242051078Speter int how; 242151078Speter{ 242251078Speter int mcr; 242351078Speter int msr; 242451078Speter 242551078Speter if (how == DMGET) { 242651078Speter bits = TIOCM_LE; /* XXX - always enabled while open */ 242751078Speter mcr = com->mcr_image; 242851078Speter if (mcr & MCR_DTR) 242951078Speter bits |= TIOCM_DTR; 243051078Speter if (mcr & MCR_RTS) 243151078Speter bits |= TIOCM_RTS; 243251078Speter msr = com->prev_modem_status; 243351078Speter if (msr & MSR_CTS) 243451078Speter bits |= TIOCM_CTS; 243551078Speter if (msr & MSR_DCD) 243651078Speter bits |= TIOCM_CD; 243751078Speter if (msr & MSR_DSR) 243851078Speter bits |= TIOCM_DSR; 243951078Speter /* 244051078Speter * XXX - MSR_RI is naturally volatile, and we make MSR_TERI 244151078Speter * more volatile by reading the modem status a lot. Perhaps 244251078Speter * we should latch both bits until the status is read here. 244351078Speter */ 244451078Speter if (msr & (MSR_RI | MSR_TERI)) 244551078Speter bits |= TIOCM_RI; 244651078Speter return (bits); 244751078Speter } 244851078Speter mcr = 0; 244951078Speter if (bits & TIOCM_DTR) 245051078Speter mcr |= MCR_DTR; 245151078Speter if (bits & TIOCM_RTS) 245251078Speter mcr |= MCR_RTS; 245351078Speter if (com->gone) 245451078Speter return(0); 245551078Speter disable_intr(); 245651078Speter switch (how) { 245751078Speter case DMSET: 245851078Speter outb(com->modem_ctl_port, 245951078Speter com->mcr_image = mcr | (com->mcr_image & MCR_IENABLE)); 246051078Speter break; 246151078Speter case DMBIS: 246251078Speter outb(com->modem_ctl_port, com->mcr_image |= mcr); 246351078Speter break; 246451078Speter case DMBIC: 246551078Speter outb(com->modem_ctl_port, com->mcr_image &= ~mcr); 246651078Speter break; 246751078Speter } 246851078Speter enable_intr(); 246951078Speter return (0); 247051078Speter} 247151078Speter 247251078Speterstatic void 247351078Spetersiosettimeout() 247451078Speter{ 247551078Speter struct com_s *com; 247651078Speter bool_t someopen; 247751078Speter int unit; 247851078Speter 247951078Speter /* 248051078Speter * Set our timeout period to 1 second if no polled devices are open. 248151078Speter * Otherwise set it to max(1/200, 1/hz). 248251078Speter * Enable timeouts iff some device is open. 248351078Speter */ 248451078Speter untimeout(comwakeup, (void *)NULL, sio_timeout_handle); 248551078Speter sio_timeout = hz; 248651078Speter someopen = FALSE; 248751078Speter for (unit = 0; unit < NSIOTOT; ++unit) { 248851078Speter com = com_addr(unit); 248951078Speter if (com != NULL && com->tp != NULL 249051078Speter && com->tp->t_state & TS_ISOPEN && !com->gone) { 249151078Speter someopen = TRUE; 249251078Speter if (com->poll || com->poll_output) { 249351078Speter sio_timeout = hz > 200 ? hz / 200 : 1; 249451078Speter break; 249551078Speter } 249651078Speter } 249751078Speter } 249851078Speter if (someopen) { 249951078Speter sio_timeouts_until_log = hz / sio_timeout; 250051078Speter sio_timeout_handle = timeout(comwakeup, (void *)NULL, 250151078Speter sio_timeout); 250251078Speter } else { 250351078Speter /* Flush error messages, if any. */ 250451078Speter sio_timeouts_until_log = 1; 250551078Speter comwakeup((void *)NULL); 250651078Speter untimeout(comwakeup, (void *)NULL, sio_timeout_handle); 250751078Speter } 250851078Speter} 250951078Speter 251051078Speterstatic void 251151078Spetercomwakeup(chan) 251251078Speter void *chan; 251351078Speter{ 251451078Speter struct com_s *com; 251551078Speter int unit; 251651078Speter 251751078Speter sio_timeout_handle = timeout(comwakeup, (void *)NULL, sio_timeout); 251851078Speter 251951078Speter /* 252051078Speter * Recover from lost output interrupts. 252151078Speter * Poll any lines that don't use interrupts. 252251078Speter */ 252351078Speter for (unit = 0; unit < NSIOTOT; ++unit) { 252451078Speter com = com_addr(unit); 252551078Speter if (com != NULL && !com->gone 252651078Speter && (com->state >= (CS_BUSY | CS_TTGO) || com->poll)) { 252751078Speter disable_intr(); 252851078Speter siointr1(com); 252951078Speter enable_intr(); 253051078Speter } 253151078Speter } 253251078Speter 253351078Speter /* 253451078Speter * Check for and log errors, but not too often. 253551078Speter */ 253651078Speter if (--sio_timeouts_until_log > 0) 253751078Speter return; 253851078Speter sio_timeouts_until_log = hz / sio_timeout; 253951078Speter for (unit = 0; unit < NSIOTOT; ++unit) { 254051078Speter int errnum; 254151078Speter 254251078Speter com = com_addr(unit); 254351078Speter if (com == NULL) 254451078Speter continue; 254551078Speter if (com->gone) 254651078Speter continue; 254751078Speter for (errnum = 0; errnum < CE_NTYPES; ++errnum) { 254851078Speter u_int delta; 254951078Speter u_long total; 255051078Speter 255151078Speter disable_intr(); 255251078Speter delta = com->delta_error_counts[errnum]; 255351078Speter com->delta_error_counts[errnum] = 0; 255451078Speter enable_intr(); 255551078Speter if (delta == 0) 255651078Speter continue; 255751078Speter total = com->error_counts[errnum] += delta; 255851078Speter log(LOG_ERR, "sio%d: %u more %s%s (total %lu)\n", 255951078Speter unit, delta, error_desc[errnum], 256051078Speter delta == 1 ? "" : "s", total); 256151078Speter } 256251078Speter } 256351078Speter} 256451078Speter 256551078Speterstatic void 256651078Speterdisc_optim(tp, t, com) 256751078Speter struct tty *tp; 256851078Speter struct termios *t; 256951078Speter struct com_s *com; 257051078Speter{ 257151078Speter if (!(t->c_iflag & (ICRNL | IGNCR | IMAXBEL | INLCR | ISTRIP | IXON)) 257251078Speter && (!(t->c_iflag & BRKINT) || (t->c_iflag & IGNBRK)) 257351078Speter && (!(t->c_iflag & PARMRK) 257451078Speter || (t->c_iflag & (IGNPAR | IGNBRK)) == (IGNPAR | IGNBRK)) 257551078Speter && !(t->c_lflag & (ECHO | ICANON | IEXTEN | ISIG | PENDIN)) 257651078Speter && linesw[tp->t_line].l_rint == ttyinput) 257751078Speter tp->t_state |= TS_CAN_BYPASS_L_RINT; 257851078Speter else 257951078Speter tp->t_state &= ~TS_CAN_BYPASS_L_RINT; 258051078Speter com->hotchar = linesw[tp->t_line].l_hotchar; 258151078Speter} 258251078Speter 258351078Speter/* 258451078Speter * Following are all routines needed for SIO to act as console 258551078Speter */ 258651078Speter#include <sys/cons.h> 258751078Speter 258851078Speterstruct siocnstate { 258951078Speter u_char dlbl; 259051078Speter u_char dlbh; 259151078Speter u_char ier; 259251078Speter u_char cfcr; 259351078Speter u_char mcr; 259451078Speter}; 259551078Speter 259651078Speterstatic speed_t siocngetspeed __P((Port_t, struct speedtab *)); 259751078Speterstatic void siocnclose __P((struct siocnstate *sp, Port_t iobase)); 259851078Speterstatic void siocnopen __P((struct siocnstate *sp, Port_t iobase, int speed)); 259951078Speterstatic void siocntxwait __P((Port_t iobase)); 260051078Speter 260151078Speterstatic cn_probe_t siocnprobe; 260251078Speterstatic cn_init_t siocninit; 260351078Speterstatic cn_checkc_t siocncheckc; 260451078Speterstatic cn_getc_t siocngetc; 260551078Speterstatic cn_putc_t siocnputc; 260651078Speter 260751078Speter#ifdef __i386__ 260851078SpeterCONS_DRIVER(sio, siocnprobe, siocninit, NULL, siocngetc, siocncheckc, siocnputc); 260951078Speter 261051078Speter#endif 261151078Speter 261251078Speter/* To get the GDB related variables */ 261351078Speter#if DDB > 0 261451078Speter#include <ddb/ddb.h> 261551078Speter#endif 261651078Speter 261751078Speterstatic void 261851078Spetersiocntxwait(iobase) 261951078Speter Port_t iobase; 262051078Speter{ 262151078Speter int timo; 262251078Speter 262351078Speter /* 262451078Speter * Wait for any pending transmission to finish. Required to avoid 262551078Speter * the UART lockup bug when the speed is changed, and for normal 262651078Speter * transmits. 262751078Speter */ 262851078Speter timo = 100000; 262951078Speter while ((inb(iobase + com_lsr) & (LSR_TSRE | LSR_TXRDY)) 263051078Speter != (LSR_TSRE | LSR_TXRDY) && --timo != 0) 263151078Speter ; 263251078Speter} 263351078Speter 263451078Speter/* 263551078Speter * Read the serial port specified and try to figure out what speed 263651078Speter * it's currently running at. We're assuming the serial port has 263751078Speter * been initialized and is basicly idle. This routine is only intended 263851078Speter * to be run at system startup. 263951078Speter * 264051078Speter * If the value read from the serial port doesn't make sense, return 0. 264151078Speter */ 264251078Speter 264351078Speterstatic speed_t 264451078Spetersiocngetspeed(iobase, table) 264551078Speter Port_t iobase; 264651078Speter struct speedtab *table; 264751078Speter{ 264851078Speter int code; 264951078Speter u_char dlbh; 265051078Speter u_char dlbl; 265151078Speter u_char cfcr; 265251078Speter 265351078Speter cfcr = inb(iobase + com_cfcr); 265451078Speter outb(iobase + com_cfcr, CFCR_DLAB | cfcr); 265551078Speter 265651078Speter dlbl = inb(iobase + com_dlbl); 265751078Speter dlbh = inb(iobase + com_dlbh); 265851078Speter 265951078Speter outb(iobase + com_cfcr, cfcr); 266051078Speter 266151078Speter code = dlbh << 8 | dlbl; 266251078Speter 266351078Speter for ( ; table->sp_speed != -1; table++) 266451078Speter if (table->sp_code == code) 266551078Speter return (table->sp_speed); 266651078Speter 266751078Speter return 0; /* didn't match anything sane */ 266851078Speter} 266951078Speter 267051078Speterstatic void 267151078Spetersiocnopen(sp, iobase, speed) 267251078Speter struct siocnstate *sp; 267351078Speter Port_t iobase; 267451078Speter int speed; 267551078Speter{ 267651078Speter int divisor; 267751078Speter u_char dlbh; 267851078Speter u_char dlbl; 267951078Speter 268051078Speter /* 268151078Speter * Save all the device control registers except the fifo register 268251078Speter * and set our default ones (cs8 -parenb speed=comdefaultrate). 268351078Speter * We can't save the fifo register since it is read-only. 268451078Speter */ 268551078Speter sp->ier = inb(iobase + com_ier); 268651078Speter outb(iobase + com_ier, 0); /* spltty() doesn't stop siointr() */ 268751078Speter siocntxwait(iobase); 268851078Speter sp->cfcr = inb(iobase + com_cfcr); 268951078Speter outb(iobase + com_cfcr, CFCR_DLAB | CFCR_8BITS); 269051078Speter sp->dlbl = inb(iobase + com_dlbl); 269151078Speter sp->dlbh = inb(iobase + com_dlbh); 269251078Speter /* 269351078Speter * Only set the divisor registers if they would change, since on 269451078Speter * some 16550 incompatibles (Startech), setting them clears the 269551078Speter * data input register. This also reduces the effects of the 269651078Speter * UMC8669F bug. 269751078Speter */ 269851078Speter divisor = ttspeedtab(speed, comspeedtab); 269951078Speter dlbl = divisor & 0xFF; 270051078Speter if (sp->dlbl != dlbl) 270151078Speter outb(iobase + com_dlbl, dlbl); 270251078Speter dlbh = (u_int) divisor >> 8; 270351078Speter if (sp->dlbh != dlbh) 270451078Speter outb(iobase + com_dlbh, dlbh); 270551078Speter outb(iobase + com_cfcr, CFCR_8BITS); 270651078Speter sp->mcr = inb(iobase + com_mcr); 270751078Speter /* 270851078Speter * We don't want interrupts, but must be careful not to "disable" 270951078Speter * them by clearing the MCR_IENABLE bit, since that might cause 271051078Speter * an interrupt by floating the IRQ line. 271151078Speter */ 271251078Speter outb(iobase + com_mcr, (sp->mcr & MCR_IENABLE) | MCR_DTR | MCR_RTS); 271351078Speter} 271451078Speter 271551078Speterstatic void 271651078Spetersiocnclose(sp, iobase) 271751078Speter struct siocnstate *sp; 271851078Speter Port_t iobase; 271951078Speter{ 272051078Speter /* 272151078Speter * Restore the device control registers. 272251078Speter */ 272351078Speter siocntxwait(iobase); 272451078Speter outb(iobase + com_cfcr, CFCR_DLAB | CFCR_8BITS); 272551078Speter if (sp->dlbl != inb(iobase + com_dlbl)) 272651078Speter outb(iobase + com_dlbl, sp->dlbl); 272751078Speter if (sp->dlbh != inb(iobase + com_dlbh)) 272851078Speter outb(iobase + com_dlbh, sp->dlbh); 272951078Speter outb(iobase + com_cfcr, sp->cfcr); 273051078Speter /* 273151078Speter * XXX damp oscillations of MCR_DTR and MCR_RTS by not restoring them. 273251078Speter */ 273351078Speter outb(iobase + com_mcr, sp->mcr | MCR_DTR | MCR_RTS); 273451078Speter outb(iobase + com_ier, sp->ier); 273551078Speter} 273651078Speter 273751078Speterstatic void 273851078Spetersiocnprobe(cp) 273951078Speter struct consdev *cp; 274051078Speter{ 274151078Speter speed_t boot_speed; 274251078Speter u_char cfcr; 274351078Speter int s, unit; 274451078Speter struct siocnstate sp; 274551078Speter 274651078Speter /* 274751078Speter * Find our first enabled console, if any. If it is a high-level 274851078Speter * console device, then initialize it and return successfully. 274951078Speter * If it is a low-level console device, then initialize it and 275051078Speter * return unsuccessfully. It must be initialized in both cases 275151078Speter * for early use by console drivers and debuggers. Initializing 275251078Speter * the hardware is not necessary in all cases, since the i/o 275351078Speter * routines initialize it on the fly, but it is necessary if 275451078Speter * input might arrive while the hardware is switched back to an 275551078Speter * uninitialized state. We can't handle multiple console devices 275651078Speter * yet because our low-level routines don't take a device arg. 275751078Speter * We trust the user to set the console flags properly so that we 275851078Speter * don't need to probe. 275951078Speter */ 276051078Speter cp->cn_pri = CN_DEAD; 276151078Speter 276251078Speter for (unit = 0; unit < 16; unit++) { /* XXX need to know how many */ 276351078Speter int flags; 276451078Speter int disabled; 276551078Speter if (resource_int_value("sio", unit, "disabled", &disabled) == 0) { 276651078Speter if (disabled) 276751078Speter continue; 276851078Speter } 276951078Speter if (resource_int_value("sio", unit, "flags", &flags)) 277051078Speter continue; 277151078Speter if (COM_CONSOLE(flags) || COM_DEBUGGER(flags)) { 277251078Speter int port; 277351078Speter Port_t iobase; 277451078Speter 277551078Speter if (resource_int_value("sio", unit, "port", &port)) 277651078Speter continue; 277751078Speter iobase = port; 277851078Speter s = spltty(); 277951078Speter if (boothowto & RB_SERIAL) { 278051078Speter boot_speed = siocngetspeed(iobase, comspeedtab); 278151078Speter if (boot_speed) 278251078Speter comdefaultrate = boot_speed; 278351078Speter } 278451078Speter 278551078Speter /* 278651078Speter * Initialize the divisor latch. We can't rely on 278751078Speter * siocnopen() to do this the first time, since it 278851078Speter * avoids writing to the latch if the latch appears 278951078Speter * to have the correct value. Also, if we didn't 279051078Speter * just read the speed from the hardware, then we 279151078Speter * need to set the speed in hardware so that 279251078Speter * switching it later is null. 279351078Speter */ 279451078Speter cfcr = inb(iobase + com_cfcr); 279551078Speter outb(iobase + com_cfcr, CFCR_DLAB | cfcr); 279651078Speter outb(iobase + com_dlbl, 279751078Speter COMBRD(comdefaultrate) & 0xff); 279851078Speter outb(iobase + com_dlbh, 279951078Speter (u_int) COMBRD(comdefaultrate) >> 8); 280051078Speter outb(iobase + com_cfcr, cfcr); 280151078Speter 280251078Speter siocnopen(&sp, iobase, comdefaultrate); 280351078Speter 280451078Speter splx(s); 280551078Speter if (COM_CONSOLE(flags) && !COM_LLCONSOLE(flags)) { 280651078Speter cp->cn_dev = makedev(CDEV_MAJOR, unit); 280751078Speter cp->cn_pri = COM_FORCECONSOLE(flags) 280851078Speter || boothowto & RB_SERIAL 280951078Speter ? CN_REMOTE : CN_NORMAL; 281051078Speter siocniobase = iobase; 281151078Speter siocnunit = unit; 281251078Speter } 281351078Speter if (COM_DEBUGGER(flags)) { 281451078Speter printf("sio%d: gdb debugging port\n", unit); 281551078Speter siogdbiobase = iobase; 281651078Speter siogdbunit = unit; 281751078Speter#if DDB > 0 281851078Speter gdbdev = makedev(CDEV_MAJOR, unit); 281951078Speter gdb_getc = siocngetc; 282051078Speter gdb_putc = siocnputc; 282151078Speter#endif 282251078Speter } 282351078Speter } 282451078Speter } 282551078Speter#ifdef __i386__ 282651078Speter#if DDB > 0 282751078Speter /* 282851078Speter * XXX Ugly Compatability. 282951078Speter * If no gdb port has been specified, set it to be the console 283051078Speter * as some configuration files don't specify the gdb port. 283151078Speter */ 283251078Speter if (gdbdev == NODEV && (boothowto & RB_GDB)) { 283351078Speter printf("Warning: no GDB port specified. Defaulting to sio%d.\n", 283451078Speter siocnunit); 283551078Speter printf("Set flag 0x80 on desired GDB port in your\n"); 283651078Speter printf("configuration file (currently sio only).\n"); 283751078Speter siogdbiobase = siocniobase; 283851078Speter siogdbunit = siocnunit; 283951078Speter gdbdev = makedev(CDEV_MAJOR, siocnunit); 284051078Speter gdb_getc = siocngetc; 284151078Speter gdb_putc = siocnputc; 284251078Speter } 284351078Speter#endif 284451078Speter#endif 284551078Speter} 284651078Speter 284751078Speter#ifdef __alpha__ 284851078Speter 284951078SpeterCONS_DRIVER(sio, NULL, NULL, NULL, siocngetc, siocncheckc, siocnputc); 285051078Speter 285151078Speterint 285251078Spetersiocnattach(port, speed) 285351078Speter int port; 285451078Speter int speed; 285551078Speter{ 285651078Speter int s; 285751078Speter u_char cfcr; 285851078Speter struct siocnstate sp; 285951078Speter 286051078Speter siocniobase = port; 286151078Speter comdefaultrate = speed; 286251078Speter sio_consdev.cn_pri = CN_NORMAL; 286351078Speter sio_consdev.cn_dev = makedev(CDEV_MAJOR, 0); 286451078Speter 286551078Speter s = spltty(); 286651078Speter 286751078Speter /* 286851078Speter * Initialize the divisor latch. We can't rely on 286951078Speter * siocnopen() to do this the first time, since it 287051078Speter * avoids writing to the latch if the latch appears 287151078Speter * to have the correct value. Also, if we didn't 287251078Speter * just read the speed from the hardware, then we 287351078Speter * need to set the speed in hardware so that 287451078Speter * switching it later is null. 287551078Speter */ 287651078Speter cfcr = inb(siocniobase + com_cfcr); 287751078Speter outb(siocniobase + com_cfcr, CFCR_DLAB | cfcr); 287851078Speter outb(siocniobase + com_dlbl, 287951078Speter COMBRD(comdefaultrate) & 0xff); 288051078Speter outb(siocniobase + com_dlbh, 288151078Speter (u_int) COMBRD(comdefaultrate) >> 8); 288251078Speter outb(siocniobase + com_cfcr, cfcr); 288351078Speter 288451078Speter siocnopen(&sp, siocniobase, comdefaultrate); 288551078Speter splx(s); 288651078Speter 288751078Speter cn_tab = &sio_consdev; 288851078Speter return 0; 288951078Speter} 289051078Speter 289151078Speterint 289251078Spetersiogdbattach(port, speed) 289351078Speter int port; 289451078Speter int speed; 289551078Speter{ 289651078Speter int s; 289751078Speter u_char cfcr; 289851078Speter struct siocnstate sp; 289951078Speter 290051078Speter siogdbiobase = port; 290151078Speter gdbdefaultrate = speed; 290251078Speter 290351078Speter s = spltty(); 290451078Speter 290551078Speter /* 290651078Speter * Initialize the divisor latch. We can't rely on 290751078Speter * siocnopen() to do this the first time, since it 290851078Speter * avoids writing to the latch if the latch appears 290951078Speter * to have the correct value. Also, if we didn't 291051078Speter * just read the speed from the hardware, then we 291151078Speter * need to set the speed in hardware so that 291251078Speter * switching it later is null. 291351078Speter */ 291451078Speter cfcr = inb(siogdbiobase + com_cfcr); 291551078Speter outb(siogdbiobase + com_cfcr, CFCR_DLAB | cfcr); 291651078Speter outb(siogdbiobase + com_dlbl, 291751078Speter COMBRD(gdbdefaultrate) & 0xff); 291851078Speter outb(siogdbiobase + com_dlbh, 291951078Speter (u_int) COMBRD(gdbdefaultrate) >> 8); 292051078Speter outb(siogdbiobase + com_cfcr, cfcr); 292151078Speter 292251078Speter siocnopen(&sp, siogdbiobase, gdbdefaultrate); 292351078Speter splx(s); 292451078Speter 292551078Speter return 0; 292651078Speter} 292751078Speter 292851078Speter#endif 292951078Speter 293051078Speterstatic void 293151078Spetersiocninit(cp) 293251078Speter struct consdev *cp; 293351078Speter{ 293451078Speter comconsole = DEV_TO_UNIT(cp->cn_dev); 293551078Speter} 293651078Speter 293751078Speterstatic int 293851078Spetersiocncheckc(dev) 293951078Speter dev_t dev; 294051078Speter{ 294151078Speter int c; 294251078Speter Port_t iobase; 294351078Speter int s; 294451078Speter struct siocnstate sp; 294551078Speter 294651078Speter if (minor(dev) == siogdbunit) 294751078Speter iobase = siogdbiobase; 294851078Speter else 294951078Speter iobase = siocniobase; 295051078Speter s = spltty(); 295151078Speter siocnopen(&sp, iobase, comdefaultrate); 295251078Speter if (inb(iobase + com_lsr) & LSR_RXRDY) 295351078Speter c = inb(iobase + com_data); 295451078Speter else 295551078Speter c = -1; 295651078Speter siocnclose(&sp, iobase); 295751078Speter splx(s); 295851078Speter return (c); 295951078Speter} 296051078Speter 296151078Speter 296251078Speterint 296351078Spetersiocngetc(dev) 296451078Speter dev_t dev; 296551078Speter{ 296651078Speter int c; 296751078Speter Port_t iobase; 296851078Speter int s; 296951078Speter struct siocnstate sp; 297051078Speter 297151078Speter if (minor(dev) == siogdbunit) 297251078Speter iobase = siogdbiobase; 297351078Speter else 297451078Speter iobase = siocniobase; 297551078Speter s = spltty(); 297651078Speter siocnopen(&sp, iobase, comdefaultrate); 297751078Speter while (!(inb(iobase + com_lsr) & LSR_RXRDY)) 297851078Speter ; 297951078Speter c = inb(iobase + com_data); 298051078Speter siocnclose(&sp, iobase); 298151078Speter splx(s); 298251078Speter return (c); 298351078Speter} 298451078Speter 298551078Spetervoid 298651078Spetersiocnputc(dev, c) 298751078Speter dev_t dev; 298851078Speter int c; 298951078Speter{ 299051078Speter int s; 299151078Speter struct siocnstate sp; 299251078Speter Port_t iobase; 299351078Speter 299451078Speter if (minor(dev) == siogdbunit) 299551078Speter iobase = siogdbiobase; 299651078Speter else 299751078Speter iobase = siocniobase; 299851078Speter s = spltty(); 299951078Speter siocnopen(&sp, iobase, comdefaultrate); 300051078Speter siocntxwait(iobase); 300151078Speter outb(iobase + com_data, c); 300251078Speter siocnclose(&sp, iobase); 300351078Speter splx(s); 300451078Speter} 300551078Speter 300651078Speter#ifdef __alpha__ 300751078Speterint 300851078Spetersiogdbgetc() 300951078Speter{ 301051078Speter int c; 301151078Speter Port_t iobase; 301251078Speter int s; 301351078Speter struct siocnstate sp; 301451078Speter 301551078Speter iobase = siogdbiobase; 301651078Speter s = spltty(); 301751078Speter siocnopen(&sp, iobase, gdbdefaultrate); 301851078Speter while (!(inb(iobase + com_lsr) & LSR_RXRDY)) 301951078Speter ; 302051078Speter c = inb(iobase + com_data); 302151078Speter siocnclose(&sp, iobase); 302251078Speter splx(s); 302351078Speter return (c); 302451078Speter} 302551078Speter 302651078Spetervoid 302751078Spetersiogdbputc(c) 302851078Speter int c; 302951078Speter{ 303051078Speter int s; 303151078Speter struct siocnstate sp; 303251078Speter 303351078Speter s = spltty(); 303451078Speter siocnopen(&sp, siogdbiobase, gdbdefaultrate); 303551078Speter siocntxwait(siogdbiobase); 303651078Speter outb(siogdbiobase + com_data, c); 303751078Speter siocnclose(&sp, siogdbiobase); 303851078Speter splx(s); 303951078Speter} 304051078Speter#endif 304151078Speter 304251078SpeterDEV_DRIVER_MODULE(sio, isa, sio_driver, sio_devclass, sio_cdevsw, 0, 0); 3043