sio.c revision 52125
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 52125 1999-10-11 15:06:14Z steve $ 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 */ 57052125Ssteve {0x01017256, NULL}, /* USR0101 */ 57151918Sdeischen {0x30207256, NULL}, /* USR2030 */ 57251918Sdeischen {0x31307256, NULL}, /* USR3031 */ 57351918Sdeischen {0x8020b04e, NULL}, /* SUP2080 */ 57451918Sdeischen {0x8024b04e, NULL}, /* SUP2480 */ 57551078Speter {0} 57651078Speter}; 57751078Speter 57851078Speterstatic int 57951078Spetersioprobe(dev) 58051078Speter device_t dev; 58151078Speter{ 58251078Speter static bool_t already_init; 58351078Speter bool_t failures[10]; 58451078Speter int fn; 58551078Speter device_t idev; 58651078Speter Port_t iobase; 58751078Speter intrmask_t irqmap[4]; 58851078Speter intrmask_t irqs; 58951078Speter u_char mcr_image; 59051078Speter int result; 59151078Speter device_t xdev; 59251088Speter u_int flags = device_get_flags(dev); 59351078Speter int rid; 59451078Speter struct resource *port; 59551078Speter 59651078Speter /* Check isapnp ids */ 59751078Speter if (ISA_PNP_PROBE(device_get_parent(dev), dev, sio_ids) == ENXIO) 59851078Speter return (ENXIO); 59951078Speter 60051078Speter rid = 0; 60151078Speter port = bus_alloc_resource(dev, SYS_RES_IOPORT, &rid, 60251078Speter 0, ~0, IO_COMSIZE, RF_ACTIVE); 60351078Speter if (!port) 60451078Speter return ENXIO; 60551078Speter 60651078Speter if (!already_init) { 60751078Speter /* 60851078Speter * Turn off MCR_IENABLE for all likely serial ports. An unused 60951078Speter * port with its MCR_IENABLE gate open will inhibit interrupts 61051078Speter * from any used port that shares the interrupt vector. 61151078Speter * XXX the gate enable is elsewhere for some multiports. 61251078Speter */ 61351078Speter device_t *devs; 61451078Speter int count, i; 61551078Speter 61651078Speter devclass_get_devices(sio_devclass, &devs, &count); 61751078Speter for (i = 0; i < count; i++) { 61851078Speter xdev = devs[i]; 61951078Speter if (device_is_enabled(xdev)) 62051078Speter outb(isa_get_port(xdev) + com_mcr, 0); 62151078Speter } 62251078Speter free(devs, M_TEMP); 62351078Speter already_init = TRUE; 62451078Speter } 62551078Speter 62651078Speter if (COM_LLCONSOLE(flags)) { 62751078Speter printf("sio%d: reserved for low-level i/o\n", 62851078Speter device_get_unit(dev)); 62951078Speter return (ENXIO); 63051078Speter } 63151078Speter 63251078Speter /* 63351078Speter * If the device is on a multiport card and has an AST/4 63451078Speter * compatible interrupt control register, initialize this 63551078Speter * register and prepare to leave MCR_IENABLE clear in the mcr. 63651078Speter * Otherwise, prepare to set MCR_IENABLE in the mcr. 63751078Speter * Point idev to the device struct giving the correct id_irq. 63851078Speter * This is the struct for the master device if there is one. 63951078Speter */ 64051078Speter idev = dev; 64151078Speter mcr_image = MCR_IENABLE; 64251078Speter#ifdef COM_MULTIPORT 64351078Speter if (COM_ISMULTIPORT(flags)) { 64451078Speter idev = devclass_get_device(sio_devclass, COM_MPMASTER(flags)); 64551078Speter if (idev == NULL) { 64651078Speter printf("sio%d: master device %d not configured\n", 64751078Speter device_get_unit(dev), COM_MPMASTER(flags)); 64851078Speter idev = dev; 64951078Speter } 65051078Speter if (!COM_NOTAST4(flags)) { 65151078Speter outb(isa_get_port(idev) + com_scr, 65251078Speter isa_get_irq(idev) >= 0 ? 0x80 : 0); 65351078Speter mcr_image = 0; 65451078Speter } 65551078Speter } 65651078Speter#endif /* COM_MULTIPORT */ 65751078Speter if (isa_get_irq(idev) < 0) 65851078Speter mcr_image = 0; 65951078Speter 66051078Speter bzero(failures, sizeof failures); 66151078Speter iobase = rman_get_start(port); 66251078Speter 66351078Speter /* 66451078Speter * We don't want to get actual interrupts, just masked ones. 66551078Speter * Interrupts from this line should already be masked in the ICU, 66651078Speter * but mask them in the processor as well in case there are some 66751078Speter * (misconfigured) shared interrupts. 66851078Speter */ 66951078Speter disable_intr(); 67051078Speter/* EXTRA DELAY? */ 67151078Speter 67251078Speter /* 67351078Speter * Initialize the speed and the word size and wait long enough to 67451078Speter * drain the maximum of 16 bytes of junk in device output queues. 67551078Speter * The speed is undefined after a master reset and must be set 67651078Speter * before relying on anything related to output. There may be 67751078Speter * junk after a (very fast) soft reboot and (apparently) after 67851078Speter * master reset. 67951078Speter * XXX what about the UART bug avoided by waiting in comparam()? 68051078Speter * We don't want to to wait long enough to drain at 2 bps. 68151078Speter */ 68251078Speter if (iobase == siocniobase) 68351078Speter DELAY((16 + 1) * 1000000 / (comdefaultrate / 10)); 68451078Speter else { 68551078Speter outb(iobase + com_cfcr, CFCR_DLAB | CFCR_8BITS); 68651078Speter outb(iobase + com_dlbl, COMBRD(SIO_TEST_SPEED) & 0xff); 68751078Speter outb(iobase + com_dlbh, (u_int) COMBRD(SIO_TEST_SPEED) >> 8); 68851078Speter outb(iobase + com_cfcr, CFCR_8BITS); 68951078Speter DELAY((16 + 1) * 1000000 / (SIO_TEST_SPEED / 10)); 69051078Speter } 69151078Speter 69251078Speter /* 69351078Speter * Enable the interrupt gate and disable device interupts. This 69451078Speter * should leave the device driving the interrupt line low and 69551078Speter * guarantee an edge trigger if an interrupt can be generated. 69651078Speter */ 69751078Speter/* EXTRA DELAY? */ 69851078Speter outb(iobase + com_mcr, mcr_image); 69951078Speter outb(iobase + com_ier, 0); 70051078Speter DELAY(1000); /* XXX */ 70151078Speter irqmap[0] = isa_irq_pending(); 70251078Speter 70351078Speter /* 70451078Speter * Attempt to set loopback mode so that we can send a null byte 70551078Speter * without annoying any external device. 70651078Speter */ 70751078Speter/* EXTRA DELAY? */ 70851078Speter outb(iobase + com_mcr, mcr_image | MCR_LOOPBACK); 70951078Speter 71051078Speter /* 71151078Speter * Attempt to generate an output interrupt. On 8250's, setting 71251078Speter * IER_ETXRDY generates an interrupt independent of the current 71351078Speter * setting and independent of whether the THR is empty. On 16450's, 71451078Speter * setting IER_ETXRDY generates an interrupt independent of the 71551078Speter * current setting. On 16550A's, setting IER_ETXRDY only 71651078Speter * generates an interrupt when IER_ETXRDY is not already set. 71751078Speter */ 71851078Speter outb(iobase + com_ier, IER_ETXRDY); 71951078Speter 72051078Speter /* 72151078Speter * On some 16x50 incompatibles, setting IER_ETXRDY doesn't generate 72251078Speter * an interrupt. They'd better generate one for actually doing 72351078Speter * output. Loopback may be broken on the same incompatibles but 72451078Speter * it's unlikely to do more than allow the null byte out. 72551078Speter */ 72651078Speter outb(iobase + com_data, 0); 72751078Speter DELAY((1 + 2) * 1000000 / (SIO_TEST_SPEED / 10)); 72851078Speter 72951078Speter /* 73051078Speter * Turn off loopback mode so that the interrupt gate works again 73151078Speter * (MCR_IENABLE was hidden). This should leave the device driving 73251078Speter * an interrupt line high. It doesn't matter if the interrupt 73351078Speter * line oscillates while we are not looking at it, since interrupts 73451078Speter * are disabled. 73551078Speter */ 73651078Speter/* EXTRA DELAY? */ 73751078Speter outb(iobase + com_mcr, mcr_image); 73851078Speter 73951078Speter /* 74051078Speter * It's a definitly Serial PCMCIA(16550A), but still be required 74151078Speter * for IIR_TXRDY implementation ( Palido 321s, DC-1S... ) 74251078Speter */ 74351078Speter if ( COM_NOPROBE(flags) ) { 74451078Speter /* Reading IIR register twice */ 74551078Speter for ( fn = 0; fn < 2; fn ++ ) { 74651078Speter DELAY(10000); 74751078Speter failures[6] = inb(iobase + com_iir); 74851078Speter } 74951078Speter /* Check IIR_TXRDY clear ? */ 75051078Speter result = 0; 75151078Speter if ( failures[6] & IIR_TXRDY ) { 75251078Speter /* Nop, Double check with clearing IER */ 75351078Speter outb(iobase + com_ier, 0); 75451078Speter if ( inb(iobase + com_iir) & IIR_NOPEND ) { 75551078Speter /* Ok. we're familia this gang */ 75651078Speter SET_FLAG(dev, COM_C_IIR_TXRDYBUG); /* Set IIR_TXRDYBUG */ 75751078Speter } else { 75851078Speter /* Unknown, Just omit this chip.. XXX */ 75951078Speter result = ENXIO; 76051078Speter } 76151078Speter } else { 76251078Speter /* OK. this is well-known guys */ 76351078Speter CLR_FLAG(dev, COM_C_IIR_TXRDYBUG); /*Clear IIR_TXRDYBUG*/ 76451078Speter } 76551078Speter outb(iobase + com_cfcr, CFCR_8BITS); 76651078Speter enable_intr(); 76751078Speter bus_release_resource(dev, SYS_RES_IOPORT, rid, port); 76851078Speter return (iobase == siocniobase ? 0 : result); 76951078Speter } 77051078Speter 77151078Speter /* 77251078Speter * Check that 77351078Speter * o the CFCR, IER and MCR in UART hold the values written to them 77451078Speter * (the values happen to be all distinct - this is good for 77551078Speter * avoiding false positive tests from bus echoes). 77651078Speter * o an output interrupt is generated and its vector is correct. 77751078Speter * o the interrupt goes away when the IIR in the UART is read. 77851078Speter */ 77951078Speter/* EXTRA DELAY? */ 78051078Speter failures[0] = inb(iobase + com_cfcr) - CFCR_8BITS; 78151078Speter failures[1] = inb(iobase + com_ier) - IER_ETXRDY; 78251078Speter failures[2] = inb(iobase + com_mcr) - mcr_image; 78351078Speter DELAY(10000); /* Some internal modems need this time */ 78451078Speter irqmap[1] = isa_irq_pending(); 78551078Speter failures[4] = (inb(iobase + com_iir) & IIR_IMASK) - IIR_TXRDY; 78651078Speter DELAY(1000); /* XXX */ 78751078Speter irqmap[2] = isa_irq_pending(); 78851078Speter failures[6] = (inb(iobase + com_iir) & IIR_IMASK) - IIR_NOPEND; 78951078Speter 79051078Speter /* 79151078Speter * Turn off all device interrupts and check that they go off properly. 79251078Speter * Leave MCR_IENABLE alone. For ports without a master port, it gates 79351078Speter * the OUT2 output of the UART to 79451078Speter * the ICU input. Closing the gate would give a floating ICU input 79551078Speter * (unless there is another device driving it) and spurious interrupts. 79651078Speter * (On the system that this was first tested on, the input floats high 79751078Speter * and gives a (masked) interrupt as soon as the gate is closed.) 79851078Speter */ 79951078Speter outb(iobase + com_ier, 0); 80051078Speter outb(iobase + com_cfcr, CFCR_8BITS); /* dummy to avoid bus echo */ 80151078Speter failures[7] = inb(iobase + com_ier); 80251078Speter DELAY(1000); /* XXX */ 80351078Speter irqmap[3] = isa_irq_pending(); 80451078Speter failures[9] = (inb(iobase + com_iir) & IIR_IMASK) - IIR_NOPEND; 80551078Speter 80651078Speter enable_intr(); 80751078Speter 80851078Speter irqs = irqmap[1] & ~irqmap[0]; 80951078Speter if (isa_get_irq(idev) >= 0 && ((1 << isa_get_irq(idev)) & irqs) == 0) 81051078Speter printf( 81151078Speter "sio%d: configured irq %d not in bitmap of probed irqs %#x\n", 81251078Speter device_get_unit(dev), isa_get_irq(idev), irqs); 81351078Speter if (bootverbose) 81451078Speter printf("sio%d: irq maps: %#x %#x %#x %#x\n", 81551078Speter device_get_unit(dev), 81651078Speter irqmap[0], irqmap[1], irqmap[2], irqmap[3]); 81751078Speter 81851078Speter result = 0; 81951078Speter for (fn = 0; fn < sizeof failures; ++fn) 82051078Speter if (failures[fn]) { 82151078Speter outb(iobase + com_mcr, 0); 82251078Speter result = ENXIO; 82351078Speter if (bootverbose) { 82451078Speter printf("sio%d: probe failed test(s):", 82551078Speter device_get_unit(dev)); 82651078Speter for (fn = 0; fn < sizeof failures; ++fn) 82751078Speter if (failures[fn]) 82851078Speter printf(" %d", fn); 82951078Speter printf("\n"); 83051078Speter } 83151078Speter break; 83251078Speter } 83351078Speter bus_release_resource(dev, SYS_RES_IOPORT, rid, port); 83451078Speter return (iobase == siocniobase ? 0 : result); 83551078Speter} 83651078Speter 83751078Speter#ifdef COM_ESP 83851078Speterstatic int 83951078Speterespattach(com, esp_port) 84051078Speter struct com_s *com; 84151078Speter Port_t esp_port; 84251078Speter{ 84351078Speter u_char dips; 84451078Speter u_char val; 84551078Speter 84651078Speter /* 84751078Speter * Check the ESP-specific I/O port to see if we're an ESP 84851078Speter * card. If not, return failure immediately. 84951078Speter */ 85051078Speter if ((inb(esp_port) & 0xf3) == 0) { 85151078Speter printf(" port 0x%x is not an ESP board?\n", esp_port); 85251078Speter return (0); 85351078Speter } 85451078Speter 85551078Speter /* 85651078Speter * We've got something that claims to be a Hayes ESP card. 85751078Speter * Let's hope so. 85851078Speter */ 85951078Speter 86051078Speter /* Get the dip-switch configuration */ 86151078Speter outb(esp_port + ESP_CMD1, ESP_GETDIPS); 86251078Speter dips = inb(esp_port + ESP_STATUS1); 86351078Speter 86451078Speter /* 86551078Speter * Bits 0,1 of dips say which COM port we are. 86651078Speter */ 86751078Speter if (com->iobase == likely_com_ports[dips & 0x03]) 86851078Speter printf(" : ESP"); 86951078Speter else { 87051078Speter printf(" esp_port has com %d\n", dips & 0x03); 87151078Speter return (0); 87251078Speter } 87351078Speter 87451078Speter /* 87551078Speter * Check for ESP version 2.0 or later: bits 4,5,6 = 010. 87651078Speter */ 87751078Speter outb(esp_port + ESP_CMD1, ESP_GETTEST); 87851078Speter val = inb(esp_port + ESP_STATUS1); /* clear reg 1 */ 87951078Speter val = inb(esp_port + ESP_STATUS2); 88051078Speter if ((val & 0x70) < 0x20) { 88151078Speter printf("-old (%o)", val & 0x70); 88251078Speter return (0); 88351078Speter } 88451078Speter 88551078Speter /* 88651078Speter * Check for ability to emulate 16550: bit 7 == 1 88751078Speter */ 88851078Speter if ((dips & 0x80) == 0) { 88951078Speter printf(" slave"); 89051078Speter return (0); 89151078Speter } 89251078Speter 89351078Speter /* 89451078Speter * Okay, we seem to be a Hayes ESP card. Whee. 89551078Speter */ 89651078Speter com->esp = TRUE; 89751078Speter com->esp_port = esp_port; 89851078Speter return (1); 89951078Speter} 90051078Speter#endif /* COM_ESP */ 90151078Speter 90251078Speterstatic int 90351078Spetersioattach(dev) 90451078Speter device_t dev; 90551078Speter{ 90651078Speter struct com_s *com; 90751078Speter#ifdef COM_ESP 90851078Speter Port_t *espp; 90951078Speter#endif 91051078Speter Port_t iobase; 91151078Speter int unit; 91251078Speter void *ih; 91351088Speter u_int flags = device_get_flags(dev); 91451078Speter int rid; 91551078Speter struct resource *port; 91651078Speter 91751078Speter rid = 0; 91851078Speter port = bus_alloc_resource(dev, SYS_RES_IOPORT, &rid, 91951078Speter 0, ~0, IO_COMSIZE, RF_ACTIVE); 92051078Speter if (!port) 92151078Speter return ENXIO; 92251078Speter 92351078Speter iobase = rman_get_start(port); 92451078Speter unit = device_get_unit(dev); 92551078Speter com = device_get_softc(dev); 92651078Speter 92751078Speter /* 92851078Speter * sioprobe() has initialized the device registers as follows: 92951078Speter * o cfcr = CFCR_8BITS. 93051078Speter * It is most important that CFCR_DLAB is off, so that the 93151078Speter * data port is not hidden when we enable interrupts. 93251078Speter * o ier = 0. 93351078Speter * Interrupts are only enabled when the line is open. 93451078Speter * o mcr = MCR_IENABLE, or 0 if the port has AST/4 compatible 93551078Speter * interrupt control register or the config specifies no irq. 93651078Speter * Keeping MCR_DTR and MCR_RTS off might stop the external 93751078Speter * device from sending before we are ready. 93851078Speter */ 93951078Speter bzero(com, sizeof *com); 94051078Speter com->unit = unit; 94151078Speter com->ioportres = port; 94251078Speter com->cfcr_image = CFCR_8BITS; 94351078Speter com->dtr_wait = 3 * hz; 94451078Speter com->loses_outints = COM_LOSESOUTINTS(flags) != 0; 94551078Speter com->no_irq = isa_get_irq(dev) < 0; 94651078Speter com->tx_fifo_size = 1; 94751078Speter com->obufs[0].l_head = com->obuf1; 94851078Speter com->obufs[1].l_head = com->obuf2; 94951078Speter 95051078Speter com->iobase = iobase; 95151078Speter com->data_port = iobase + com_data; 95251078Speter com->int_id_port = iobase + com_iir; 95351078Speter com->modem_ctl_port = iobase + com_mcr; 95451078Speter com->mcr_image = inb(com->modem_ctl_port); 95551078Speter com->line_status_port = iobase + com_lsr; 95651078Speter com->modem_status_port = iobase + com_msr; 95751078Speter com->intr_ctl_port = iobase + com_ier; 95851078Speter 95951078Speter /* 96051078Speter * We don't use all the flags from <sys/ttydefaults.h> since they 96151078Speter * are only relevant for logins. It's important to have echo off 96251078Speter * initially so that the line doesn't start blathering before the 96351078Speter * echo flag can be turned off. 96451078Speter */ 96551078Speter com->it_in.c_iflag = 0; 96651078Speter com->it_in.c_oflag = 0; 96751078Speter com->it_in.c_cflag = TTYDEF_CFLAG; 96851078Speter com->it_in.c_lflag = 0; 96951078Speter if (unit == comconsole) { 97051078Speter com->it_in.c_iflag = TTYDEF_IFLAG; 97151078Speter com->it_in.c_oflag = TTYDEF_OFLAG; 97251078Speter com->it_in.c_cflag = TTYDEF_CFLAG | CLOCAL; 97351078Speter com->it_in.c_lflag = TTYDEF_LFLAG; 97451078Speter com->lt_out.c_cflag = com->lt_in.c_cflag = CLOCAL; 97551078Speter com->lt_out.c_ispeed = com->lt_out.c_ospeed = 97651078Speter com->lt_in.c_ispeed = com->lt_in.c_ospeed = 97751078Speter com->it_in.c_ispeed = com->it_in.c_ospeed = comdefaultrate; 97851078Speter } else 97951078Speter com->it_in.c_ispeed = com->it_in.c_ospeed = TTYDEF_SPEED; 98051078Speter if (siosetwater(com, com->it_in.c_ispeed) != 0) { 98151078Speter enable_intr(); 98251078Speter free(com, M_DEVBUF); 98351078Speter return (0); 98451078Speter } 98551078Speter enable_intr(); 98651078Speter termioschars(&com->it_in); 98751078Speter com->it_out = com->it_in; 98851078Speter 98951078Speter /* attempt to determine UART type */ 99051078Speter printf("sio%d: type", unit); 99151078Speter 99251078Speter 99351078Speter#ifdef COM_MULTIPORT 99451078Speter if (!COM_ISMULTIPORT(flags) && !COM_IIR_TXRDYBUG(flags)) 99551078Speter#else 99651078Speter if (!COM_IIR_TXRDYBUG(flags)) 99751078Speter#endif 99851078Speter { 99951078Speter u_char scr; 100051078Speter u_char scr1; 100151078Speter u_char scr2; 100251078Speter 100351078Speter scr = inb(iobase + com_scr); 100451078Speter outb(iobase + com_scr, 0xa5); 100551078Speter scr1 = inb(iobase + com_scr); 100651078Speter outb(iobase + com_scr, 0x5a); 100751078Speter scr2 = inb(iobase + com_scr); 100851078Speter outb(iobase + com_scr, scr); 100951078Speter if (scr1 != 0xa5 || scr2 != 0x5a) { 101051078Speter printf(" 8250"); 101151078Speter goto determined_type; 101251078Speter } 101351078Speter } 101451078Speter outb(iobase + com_fifo, FIFO_ENABLE | FIFO_RX_HIGH); 101551078Speter DELAY(100); 101651078Speter com->st16650a = 0; 101751078Speter switch (inb(com->int_id_port) & IIR_FIFO_MASK) { 101851078Speter case FIFO_RX_LOW: 101951078Speter printf(" 16450"); 102051078Speter break; 102151078Speter case FIFO_RX_MEDL: 102251078Speter printf(" 16450?"); 102351078Speter break; 102451078Speter case FIFO_RX_MEDH: 102551078Speter printf(" 16550?"); 102651078Speter break; 102751078Speter case FIFO_RX_HIGH: 102851078Speter if (COM_NOFIFO(flags)) { 102951078Speter printf(" 16550A fifo disabled"); 103051078Speter } else { 103151078Speter com->hasfifo = TRUE; 103251078Speter if (COM_ST16650A(flags)) { 103351078Speter com->st16650a = 1; 103451078Speter com->tx_fifo_size = 32; 103551078Speter printf(" ST16650A"); 103651078Speter } else { 103751078Speter com->tx_fifo_size = COM_FIFOSIZE(flags); 103851078Speter printf(" 16550A"); 103951078Speter } 104051078Speter } 104151078Speter#ifdef COM_ESP 104251078Speter for (espp = likely_esp_ports; *espp != 0; espp++) 104351078Speter if (espattach(com, *espp)) { 104451078Speter com->tx_fifo_size = 1024; 104551078Speter break; 104651078Speter } 104751078Speter#endif 104851078Speter if (!com->st16650a) { 104951078Speter if (!com->tx_fifo_size) 105051078Speter com->tx_fifo_size = 16; 105151078Speter else 105251078Speter printf(" lookalike with %d bytes FIFO", 105351078Speter com->tx_fifo_size); 105451078Speter } 105551078Speter 105651078Speter break; 105751078Speter } 105851078Speter 105951078Speter#ifdef COM_ESP 106051078Speter if (com->esp) { 106151078Speter /* 106251078Speter * Set 16550 compatibility mode. 106351078Speter * We don't use the ESP_MODE_SCALE bit to increase the 106451078Speter * fifo trigger levels because we can't handle large 106551078Speter * bursts of input. 106651078Speter * XXX flow control should be set in comparam(), not here. 106751078Speter */ 106851078Speter outb(com->esp_port + ESP_CMD1, ESP_SETMODE); 106951078Speter outb(com->esp_port + ESP_CMD2, ESP_MODE_RTS | ESP_MODE_FIFO); 107051078Speter 107151078Speter /* Set RTS/CTS flow control. */ 107251078Speter outb(com->esp_port + ESP_CMD1, ESP_SETFLOWTYPE); 107351078Speter outb(com->esp_port + ESP_CMD2, ESP_FLOW_RTS); 107451078Speter outb(com->esp_port + ESP_CMD2, ESP_FLOW_CTS); 107551078Speter 107651078Speter /* Set flow-control levels. */ 107751078Speter outb(com->esp_port + ESP_CMD1, ESP_SETRXFLOW); 107851078Speter outb(com->esp_port + ESP_CMD2, HIBYTE(768)); 107951078Speter outb(com->esp_port + ESP_CMD2, LOBYTE(768)); 108051078Speter outb(com->esp_port + ESP_CMD2, HIBYTE(512)); 108151078Speter outb(com->esp_port + ESP_CMD2, LOBYTE(512)); 108251078Speter } 108351078Speter#endif /* COM_ESP */ 108451078Speter outb(iobase + com_fifo, 0); 108551078Speterdetermined_type: ; 108651078Speter 108751078Speter#ifdef COM_MULTIPORT 108851078Speter if (COM_ISMULTIPORT(flags)) { 108951078Speter com->multiport = TRUE; 109051078Speter printf(" (multiport"); 109151078Speter if (unit == COM_MPMASTER(flags)) 109251078Speter printf(" master"); 109351078Speter printf(")"); 109451078Speter com->no_irq = 109551078Speter isa_get_irq(devclass_get_device 109651078Speter (sio_devclass, COM_MPMASTER(flags))) < 0; 109751078Speter } 109851078Speter#endif /* COM_MULTIPORT */ 109951078Speter if (unit == comconsole) 110051078Speter printf(", console"); 110151078Speter if ( COM_IIR_TXRDYBUG(flags) ) 110251078Speter printf(" with a bogus IIR_TXRDY register"); 110351078Speter printf("\n"); 110451078Speter 110551078Speter if (!sio_registered) { 110651078Speter register_swi(SWI_TTY, siopoll); 110751078Speter sio_registered = TRUE; 110851078Speter } 110951078Speter make_dev(&sio_cdevsw, unit, 111051078Speter UID_ROOT, GID_WHEEL, 0600, "ttyd%r", unit); 111151078Speter make_dev(&sio_cdevsw, unit | CONTROL_INIT_STATE, 111251078Speter UID_ROOT, GID_WHEEL, 0600, "ttyid%r", unit); 111351078Speter make_dev(&sio_cdevsw, unit | CONTROL_LOCK_STATE, 111451078Speter UID_ROOT, GID_WHEEL, 0600, "ttyld%r", unit); 111551078Speter make_dev(&sio_cdevsw, unit | CALLOUT_MASK, 111651078Speter UID_UUCP, GID_DIALER, 0660, "cuaa%r", unit); 111751078Speter make_dev(&sio_cdevsw, unit | CALLOUT_MASK | CONTROL_INIT_STATE, 111851078Speter UID_UUCP, GID_DIALER, 0660, "cuaia%r", unit); 111951078Speter make_dev(&sio_cdevsw, unit | CALLOUT_MASK | CONTROL_LOCK_STATE, 112051078Speter UID_UUCP, GID_DIALER, 0660, "cuala%r", unit); 112151078Speter com->flags = flags; 112251078Speter com->pps.ppscap = PPS_CAPTUREASSERT | PPS_CAPTURECLEAR; 112351078Speter pps_init(&com->pps); 112451078Speter 112551078Speter rid = 0; 112651078Speter com->irqres = bus_alloc_resource(dev, SYS_RES_IRQ, &rid, 0ul, ~0ul, 1, 112751078Speter RF_SHAREABLE | RF_ACTIVE); 112851078Speter BUS_SETUP_INTR(device_get_parent(dev), dev, com->irqres, 112951078Speter INTR_TYPE_TTY | INTR_TYPE_FAST, 113051078Speter siointr, com, &ih); 113151078Speter 113251078Speter return (0); 113351078Speter} 113451078Speter 113551078Speterstatic int 113651078Spetersioopen(dev, flag, mode, p) 113751078Speter dev_t dev; 113851078Speter int flag; 113951078Speter int mode; 114051078Speter struct proc *p; 114151078Speter{ 114251078Speter struct com_s *com; 114351078Speter int error; 114451078Speter Port_t iobase; 114551078Speter int mynor; 114651078Speter int s; 114751078Speter struct tty *tp; 114851078Speter int unit; 114951078Speter 115051078Speter mynor = minor(dev); 115151078Speter unit = MINOR_TO_UNIT(mynor); 115251078Speter if ((u_int) unit >= NSIOTOT || (com = com_addr(unit)) == NULL) 115351078Speter return (ENXIO); 115451078Speter if (com->gone) 115551078Speter return (ENXIO); 115651078Speter if (mynor & CONTROL_MASK) 115751078Speter return (0); 115851078Speter tp = dev->si_tty = com->tp = ttymalloc(com->tp); 115951078Speter s = spltty(); 116051078Speter /* 116151078Speter * We jump to this label after all non-interrupted sleeps to pick 116251078Speter * up any changes of the device state. 116351078Speter */ 116451078Speteropen_top: 116551078Speter while (com->state & CS_DTR_OFF) { 116651078Speter error = tsleep(&com->dtr_wait, TTIPRI | PCATCH, "siodtr", 0); 116751078Speter if (com_addr(unit) == NULL) 116851078Speter return (ENXIO); 116951078Speter if (error != 0 || com->gone) 117051078Speter goto out; 117151078Speter } 117251078Speter if (tp->t_state & TS_ISOPEN) { 117351078Speter /* 117451078Speter * The device is open, so everything has been initialized. 117551078Speter * Handle conflicts. 117651078Speter */ 117751078Speter if (mynor & CALLOUT_MASK) { 117851078Speter if (!com->active_out) { 117951078Speter error = EBUSY; 118051078Speter goto out; 118151078Speter } 118251078Speter } else { 118351078Speter if (com->active_out) { 118451078Speter if (flag & O_NONBLOCK) { 118551078Speter error = EBUSY; 118651078Speter goto out; 118751078Speter } 118851078Speter error = tsleep(&com->active_out, 118951078Speter TTIPRI | PCATCH, "siobi", 0); 119051078Speter if (com_addr(unit) == NULL) 119151078Speter return (ENXIO); 119251078Speter if (error != 0 || com->gone) 119351078Speter goto out; 119451078Speter goto open_top; 119551078Speter } 119651078Speter } 119751078Speter if (tp->t_state & TS_XCLUDE && 119851078Speter suser(p)) { 119951078Speter error = EBUSY; 120051078Speter goto out; 120151078Speter } 120251078Speter } else { 120351078Speter /* 120451078Speter * The device isn't open, so there are no conflicts. 120551078Speter * Initialize it. Initialization is done twice in many 120651078Speter * cases: to preempt sleeping callin opens if we are 120751078Speter * callout, and to complete a callin open after DCD rises. 120851078Speter */ 120951078Speter tp->t_oproc = comstart; 121051078Speter tp->t_param = comparam; 121151654Sphk tp->t_stop = comstop; 121251078Speter tp->t_dev = dev; 121351078Speter tp->t_termios = mynor & CALLOUT_MASK 121451078Speter ? com->it_out : com->it_in; 121551078Speter (void)commctl(com, TIOCM_DTR | TIOCM_RTS, DMSET); 121651078Speter com->poll = com->no_irq; 121751078Speter com->poll_output = com->loses_outints; 121851078Speter ++com->wopeners; 121951078Speter error = comparam(tp, &tp->t_termios); 122051078Speter --com->wopeners; 122151078Speter if (error != 0) 122251078Speter goto out; 122351078Speter /* 122451078Speter * XXX we should goto open_top if comparam() slept. 122551078Speter */ 122651078Speter iobase = com->iobase; 122751078Speter if (com->hasfifo) { 122851078Speter /* 122951078Speter * (Re)enable and drain fifos. 123051078Speter * 123151078Speter * Certain SMC chips cause problems if the fifos 123251078Speter * are enabled while input is ready. Turn off the 123351078Speter * fifo if necessary to clear the input. We test 123451078Speter * the input ready bit after enabling the fifos 123551078Speter * since we've already enabled them in comparam() 123651078Speter * and to handle races between enabling and fresh 123751078Speter * input. 123851078Speter */ 123951078Speter while (TRUE) { 124051078Speter outb(iobase + com_fifo, 124151078Speter FIFO_RCV_RST | FIFO_XMT_RST 124251078Speter | com->fifo_image); 124351078Speter /* 124451078Speter * XXX the delays are for superstitious 124551078Speter * historical reasons. It must be less than 124651078Speter * the character time at the maximum 124751078Speter * supported speed (87 usec at 115200 bps 124851078Speter * 8N1). Otherwise we might loop endlessly 124951078Speter * if data is streaming in. We used to use 125051078Speter * delays of 100. That usually worked 125151078Speter * because DELAY(100) used to usually delay 125251078Speter * for about 85 usec instead of 100. 125351078Speter */ 125451078Speter DELAY(50); 125551078Speter if (!(inb(com->line_status_port) & LSR_RXRDY)) 125651078Speter break; 125751078Speter outb(iobase + com_fifo, 0); 125851078Speter DELAY(50); 125951078Speter (void) inb(com->data_port); 126051078Speter } 126151078Speter } 126251078Speter 126351078Speter disable_intr(); 126451078Speter (void) inb(com->line_status_port); 126551078Speter (void) inb(com->data_port); 126651078Speter com->prev_modem_status = com->last_modem_status 126751078Speter = inb(com->modem_status_port); 126851078Speter if (COM_IIR_TXRDYBUG(com->flags)) { 126951078Speter outb(com->intr_ctl_port, IER_ERXRDY | IER_ERLS 127051078Speter | IER_EMSC); 127151078Speter } else { 127251078Speter outb(com->intr_ctl_port, IER_ERXRDY | IER_ETXRDY 127351078Speter | IER_ERLS | IER_EMSC); 127451078Speter } 127551078Speter enable_intr(); 127651078Speter /* 127751078Speter * Handle initial DCD. Callout devices get a fake initial 127851078Speter * DCD (trapdoor DCD). If we are callout, then any sleeping 127951078Speter * callin opens get woken up and resume sleeping on "siobi" 128051078Speter * instead of "siodcd". 128151078Speter */ 128251078Speter /* 128351078Speter * XXX `mynor & CALLOUT_MASK' should be 128451078Speter * `tp->t_cflag & (SOFT_CARRIER | TRAPDOOR_CARRIER) where 128551078Speter * TRAPDOOR_CARRIER is the default initial state for callout 128651078Speter * devices and SOFT_CARRIER is like CLOCAL except it hides 128751078Speter * the true carrier. 128851078Speter */ 128951078Speter if (com->prev_modem_status & MSR_DCD || mynor & CALLOUT_MASK) 129051078Speter (*linesw[tp->t_line].l_modem)(tp, 1); 129151078Speter } 129251078Speter /* 129351078Speter * Wait for DCD if necessary. 129451078Speter */ 129551078Speter if (!(tp->t_state & TS_CARR_ON) && !(mynor & CALLOUT_MASK) 129651078Speter && !(tp->t_cflag & CLOCAL) && !(flag & O_NONBLOCK)) { 129751078Speter ++com->wopeners; 129851078Speter error = tsleep(TSA_CARR_ON(tp), TTIPRI | PCATCH, "siodcd", 0); 129951078Speter if (com_addr(unit) == NULL) 130051078Speter return (ENXIO); 130151078Speter --com->wopeners; 130251078Speter if (error != 0 || com->gone) 130351078Speter goto out; 130451078Speter goto open_top; 130551078Speter } 130651078Speter error = (*linesw[tp->t_line].l_open)(dev, tp); 130751078Speter disc_optim(tp, &tp->t_termios, com); 130851078Speter if (tp->t_state & TS_ISOPEN && mynor & CALLOUT_MASK) 130951078Speter com->active_out = TRUE; 131051078Speter siosettimeout(); 131151078Speterout: 131251078Speter splx(s); 131351078Speter if (!(tp->t_state & TS_ISOPEN) && com->wopeners == 0) 131451078Speter comhardclose(com); 131551078Speter return (error); 131651078Speter} 131751078Speter 131851078Speterstatic int 131951078Spetersioclose(dev, flag, mode, p) 132051078Speter dev_t dev; 132151078Speter int flag; 132251078Speter int mode; 132351078Speter struct proc *p; 132451078Speter{ 132551078Speter struct com_s *com; 132651078Speter int mynor; 132751078Speter int s; 132851078Speter struct tty *tp; 132951078Speter 133051078Speter mynor = minor(dev); 133151078Speter if (mynor & CONTROL_MASK) 133251078Speter return (0); 133351078Speter com = com_addr(MINOR_TO_UNIT(mynor)); 133451078Speter tp = com->tp; 133551078Speter s = spltty(); 133651078Speter (*linesw[tp->t_line].l_close)(tp, flag); 133751078Speter disc_optim(tp, &tp->t_termios, com); 133851654Sphk comstop(tp, FREAD | FWRITE); 133951078Speter comhardclose(com); 134051078Speter ttyclose(tp); 134151078Speter siosettimeout(); 134251078Speter splx(s); 134351078Speter if (com->gone) { 134451078Speter printf("sio%d: gone\n", com->unit); 134551078Speter s = spltty(); 134651078Speter if (com->ibuf != NULL) 134751078Speter free(com->ibuf, M_DEVBUF); 134851078Speter bzero(tp, sizeof *tp); 134951078Speter free(com, M_DEVBUF); 135051078Speter splx(s); 135151078Speter } 135251078Speter return (0); 135351078Speter} 135451078Speter 135551078Speterstatic void 135651078Spetercomhardclose(com) 135751078Speter struct com_s *com; 135851078Speter{ 135951078Speter Port_t iobase; 136051078Speter int s; 136151078Speter struct tty *tp; 136251078Speter int unit; 136351078Speter 136451078Speter unit = com->unit; 136551078Speter iobase = com->iobase; 136651078Speter s = spltty(); 136751078Speter com->poll = FALSE; 136851078Speter com->poll_output = FALSE; 136951078Speter com->do_timestamp = FALSE; 137051078Speter com->do_dcd_timestamp = FALSE; 137151078Speter com->pps.ppsparam.mode = 0; 137251078Speter outb(iobase + com_cfcr, com->cfcr_image &= ~CFCR_SBREAK); 137351078Speter { 137451078Speter outb(iobase + com_ier, 0); 137551078Speter tp = com->tp; 137651078Speter if (tp->t_cflag & HUPCL 137751078Speter /* 137851078Speter * XXX we will miss any carrier drop between here and the 137951078Speter * next open. Perhaps we should watch DCD even when the 138051078Speter * port is closed; it is not sufficient to check it at 138151078Speter * the next open because it might go up and down while 138251078Speter * we're not watching. 138351078Speter */ 138451078Speter || (!com->active_out 138551078Speter && !(com->prev_modem_status & MSR_DCD) 138651078Speter && !(com->it_in.c_cflag & CLOCAL)) 138751078Speter || !(tp->t_state & TS_ISOPEN)) { 138851078Speter (void)commctl(com, TIOCM_DTR, DMBIC); 138951078Speter if (com->dtr_wait != 0 && !(com->state & CS_DTR_OFF)) { 139051078Speter timeout(siodtrwakeup, com, com->dtr_wait); 139151078Speter com->state |= CS_DTR_OFF; 139251078Speter } 139351078Speter } 139451078Speter } 139551078Speter if (com->hasfifo) { 139651078Speter /* 139751078Speter * Disable fifos so that they are off after controlled 139851078Speter * reboots. Some BIOSes fail to detect 16550s when the 139951078Speter * fifos are enabled. 140051078Speter */ 140151078Speter outb(iobase + com_fifo, 0); 140251078Speter } 140351078Speter com->active_out = FALSE; 140451078Speter wakeup(&com->active_out); 140551078Speter wakeup(TSA_CARR_ON(tp)); /* restart any wopeners */ 140651078Speter splx(s); 140751078Speter} 140851078Speter 140951078Speterstatic int 141051078Spetersioread(dev, uio, flag) 141151078Speter dev_t dev; 141251078Speter struct uio *uio; 141351078Speter int flag; 141451078Speter{ 141551078Speter int mynor; 141651078Speter struct com_s *com; 141751078Speter 141851078Speter mynor = minor(dev); 141951078Speter if (mynor & CONTROL_MASK) 142051078Speter return (ENODEV); 142151078Speter com = com_addr(MINOR_TO_UNIT(mynor)); 142251078Speter if (com->gone) 142351078Speter return (ENODEV); 142451078Speter return ((*linesw[com->tp->t_line].l_read)(com->tp, uio, flag)); 142551078Speter} 142651078Speter 142751078Speterstatic int 142851078Spetersiowrite(dev, uio, flag) 142951078Speter dev_t dev; 143051078Speter struct uio *uio; 143151078Speter int flag; 143251078Speter{ 143351078Speter int mynor; 143451078Speter struct com_s *com; 143551078Speter int unit; 143651078Speter 143751078Speter mynor = minor(dev); 143851078Speter if (mynor & CONTROL_MASK) 143951078Speter return (ENODEV); 144051078Speter 144151078Speter unit = MINOR_TO_UNIT(mynor); 144251078Speter com = com_addr(unit); 144351078Speter if (com->gone) 144451078Speter return (ENODEV); 144551078Speter /* 144651078Speter * (XXX) We disallow virtual consoles if the physical console is 144751078Speter * a serial port. This is in case there is a display attached that 144851078Speter * is not the console. In that situation we don't need/want the X 144951078Speter * server taking over the console. 145051078Speter */ 145151078Speter if (constty != NULL && unit == comconsole) 145251078Speter constty = NULL; 145351078Speter return ((*linesw[com->tp->t_line].l_write)(com->tp, uio, flag)); 145451078Speter} 145551078Speter 145651078Speterstatic void 145751078Spetersiobusycheck(chan) 145851078Speter void *chan; 145951078Speter{ 146051078Speter struct com_s *com; 146151078Speter int s; 146251078Speter 146351078Speter com = (struct com_s *)chan; 146451078Speter 146551078Speter /* 146651078Speter * Clear TS_BUSY if low-level output is complete. 146751078Speter * spl locking is sufficient because siointr1() does not set CS_BUSY. 146851078Speter * If siointr1() clears CS_BUSY after we look at it, then we'll get 146951078Speter * called again. Reading the line status port outside of siointr1() 147051078Speter * is safe because CS_BUSY is clear so there are no output interrupts 147151078Speter * to lose. 147251078Speter */ 147351078Speter s = spltty(); 147451078Speter if (com->state & CS_BUSY) 147551078Speter com->extra_state &= ~CSE_BUSYCHECK; /* False alarm. */ 147651078Speter else if ((inb(com->line_status_port) & (LSR_TSRE | LSR_TXRDY)) 147751078Speter == (LSR_TSRE | LSR_TXRDY)) { 147851078Speter com->tp->t_state &= ~TS_BUSY; 147951078Speter ttwwakeup(com->tp); 148051078Speter com->extra_state &= ~CSE_BUSYCHECK; 148151078Speter } else 148251078Speter timeout(siobusycheck, com, hz / 100); 148351078Speter splx(s); 148451078Speter} 148551078Speter 148651078Speterstatic void 148751078Spetersiodtrwakeup(chan) 148851078Speter void *chan; 148951078Speter{ 149051078Speter struct com_s *com; 149151078Speter 149251078Speter com = (struct com_s *)chan; 149351078Speter com->state &= ~CS_DTR_OFF; 149451078Speter wakeup(&com->dtr_wait); 149551078Speter} 149651078Speter 149751078Speterstatic void 149851078Spetersioinput(com) 149951078Speter struct com_s *com; 150051078Speter{ 150151078Speter u_char *buf; 150251078Speter int incc; 150351078Speter u_char line_status; 150451078Speter int recv_data; 150551078Speter struct tty *tp; 150651078Speter 150751078Speter buf = com->ibuf; 150851078Speter tp = com->tp; 150951078Speter if (!(tp->t_state & TS_ISOPEN) || !(tp->t_cflag & CREAD)) { 151051078Speter com_events -= (com->iptr - com->ibuf); 151151078Speter com->iptr = com->ibuf; 151251078Speter return; 151351078Speter } 151451078Speter if (tp->t_state & TS_CAN_BYPASS_L_RINT) { 151551078Speter /* 151651078Speter * Avoid the grotesquely inefficient lineswitch routine 151751078Speter * (ttyinput) in "raw" mode. It usually takes about 450 151851078Speter * instructions (that's without canonical processing or echo!). 151951078Speter * slinput is reasonably fast (usually 40 instructions plus 152051078Speter * call overhead). 152151078Speter */ 152251078Speter do { 152351078Speter enable_intr(); 152451078Speter incc = com->iptr - buf; 152551078Speter if (tp->t_rawq.c_cc + incc > tp->t_ihiwat 152651078Speter && (com->state & CS_RTS_IFLOW 152751078Speter || tp->t_iflag & IXOFF) 152851078Speter && !(tp->t_state & TS_TBLOCK)) 152951078Speter ttyblock(tp); 153051078Speter com->delta_error_counts[CE_TTY_BUF_OVERFLOW] 153151078Speter += b_to_q((char *)buf, incc, &tp->t_rawq); 153251078Speter buf += incc; 153351078Speter tk_nin += incc; 153451078Speter tk_rawcc += incc; 153551078Speter tp->t_rawcc += incc; 153651078Speter ttwakeup(tp); 153751078Speter if (tp->t_state & TS_TTSTOP 153851078Speter && (tp->t_iflag & IXANY 153951078Speter || tp->t_cc[VSTART] == tp->t_cc[VSTOP])) { 154051078Speter tp->t_state &= ~TS_TTSTOP; 154151078Speter tp->t_lflag &= ~FLUSHO; 154251078Speter comstart(tp); 154351078Speter } 154451078Speter disable_intr(); 154551078Speter } while (buf < com->iptr); 154651078Speter } else { 154751078Speter do { 154851078Speter enable_intr(); 154951078Speter line_status = buf[com->ierroff]; 155051078Speter recv_data = *buf++; 155151078Speter if (line_status 155251078Speter & (LSR_BI | LSR_FE | LSR_OE | LSR_PE)) { 155351078Speter if (line_status & LSR_BI) 155451078Speter recv_data |= TTY_BI; 155551078Speter if (line_status & LSR_FE) 155651078Speter recv_data |= TTY_FE; 155751078Speter if (line_status & LSR_OE) 155851078Speter recv_data |= TTY_OE; 155951078Speter if (line_status & LSR_PE) 156051078Speter recv_data |= TTY_PE; 156151078Speter } 156251078Speter (*linesw[tp->t_line].l_rint)(recv_data, tp); 156351078Speter disable_intr(); 156451078Speter } while (buf < com->iptr); 156551078Speter } 156651078Speter com_events -= (com->iptr - com->ibuf); 156751078Speter com->iptr = com->ibuf; 156851078Speter 156951078Speter /* 157051078Speter * There is now room for another low-level buffer full of input, 157151078Speter * so enable RTS if it is now disabled and there is room in the 157251078Speter * high-level buffer. 157351078Speter */ 157451078Speter if ((com->state & CS_RTS_IFLOW) && !(com->mcr_image & MCR_RTS) && 157551078Speter !(tp->t_state & TS_TBLOCK)) 157651078Speter outb(com->modem_ctl_port, com->mcr_image |= MCR_RTS); 157751078Speter} 157851078Speter 157951078Spetervoid 158051078Spetersiointr(arg) 158151078Speter void *arg; 158251078Speter{ 158351078Speter#ifndef COM_MULTIPORT 158451078Speter COM_LOCK(); 158551078Speter siointr1((struct com_s *) arg); 158651078Speter COM_UNLOCK(); 158751078Speter#else /* COM_MULTIPORT */ 158851078Speter bool_t possibly_more_intrs; 158951078Speter int unit; 159051078Speter struct com_s *com; 159151078Speter 159251078Speter /* 159351078Speter * Loop until there is no activity on any port. This is necessary 159451078Speter * to get an interrupt edge more than to avoid another interrupt. 159551078Speter * If the IRQ signal is just an OR of the IRQ signals from several 159651078Speter * devices, then the edge from one may be lost because another is 159751078Speter * on. 159851078Speter */ 159951078Speter COM_LOCK(); 160051078Speter do { 160151078Speter possibly_more_intrs = FALSE; 160251078Speter for (unit = 0; unit < NSIOTOT; ++unit) { 160351078Speter com = com_addr(unit); 160451078Speter /* 160551078Speter * XXX COM_LOCK(); 160651078Speter * would it work here, or be counter-productive? 160751078Speter */ 160851078Speter if (com != NULL 160951078Speter && !com->gone 161051078Speter && (inb(com->int_id_port) & IIR_IMASK) 161151078Speter != IIR_NOPEND) { 161251078Speter siointr1(com); 161351078Speter possibly_more_intrs = TRUE; 161451078Speter } 161551078Speter /* XXX COM_UNLOCK(); */ 161651078Speter } 161751078Speter } while (possibly_more_intrs); 161851078Speter COM_UNLOCK(); 161951078Speter#endif /* COM_MULTIPORT */ 162051078Speter} 162151078Speter 162251078Speterstatic void 162351078Spetersiointr1(com) 162451078Speter struct com_s *com; 162551078Speter{ 162651078Speter u_char line_status; 162751078Speter u_char modem_status; 162851078Speter u_char *ioptr; 162951078Speter u_char recv_data; 163051078Speter u_char int_ctl; 163151078Speter u_char int_ctl_new; 163251078Speter struct timecounter *tc; 163351078Speter u_int count; 163451078Speter 163551078Speter int_ctl = inb(com->intr_ctl_port); 163651078Speter int_ctl_new = int_ctl; 163751078Speter 163851078Speter while (!com->gone) { 163951078Speter if (com->pps.ppsparam.mode & PPS_CAPTUREBOTH) { 164051078Speter modem_status = inb(com->modem_status_port); 164151078Speter if ((modem_status ^ com->last_modem_status) & MSR_DCD) { 164251078Speter tc = timecounter; 164351078Speter count = tc->tc_get_timecount(tc); 164451078Speter pps_event(&com->pps, tc, count, 164551078Speter (modem_status & MSR_DCD) ? 164651078Speter PPS_CAPTUREASSERT : PPS_CAPTURECLEAR); 164751078Speter } 164851078Speter } 164951078Speter line_status = inb(com->line_status_port); 165051078Speter 165151078Speter /* input event? (check first to help avoid overruns) */ 165251078Speter while (line_status & LSR_RCV_MASK) { 165351078Speter /* break/unnattached error bits or real input? */ 165451078Speter if (!(line_status & LSR_RXRDY)) 165551078Speter recv_data = 0; 165651078Speter else 165751078Speter recv_data = inb(com->data_port); 165851078Speter if (line_status & (LSR_BI | LSR_FE | LSR_PE)) { 165951078Speter /* 166051078Speter * Don't store BI if IGNBRK or FE/PE if IGNPAR. 166151078Speter * Otherwise, push the work to a higher level 166251078Speter * (to handle PARMRK) if we're bypassing. 166351078Speter * Otherwise, convert BI/FE and PE+INPCK to 0. 166451078Speter * 166551078Speter * This makes bypassing work right in the 166651078Speter * usual "raw" case (IGNBRK set, and IGNPAR 166751078Speter * and INPCK clear). 166851078Speter * 166951078Speter * Note: BI together with FE/PE means just BI. 167051078Speter */ 167151078Speter if (line_status & LSR_BI) { 167251078Speter#if defined(DDB) && defined(BREAK_TO_DEBUGGER) 167351078Speter if (com->unit == comconsole) { 167451078Speter breakpoint(); 167551078Speter goto cont; 167651078Speter } 167751078Speter#endif 167851078Speter if (com->tp == NULL 167951078Speter || com->tp->t_iflag & IGNBRK) 168051078Speter goto cont; 168151078Speter } else { 168251078Speter if (com->tp == NULL 168351078Speter || com->tp->t_iflag & IGNPAR) 168451078Speter goto cont; 168551078Speter } 168651078Speter if (com->tp->t_state & TS_CAN_BYPASS_L_RINT 168751078Speter && (line_status & (LSR_BI | LSR_FE) 168851078Speter || com->tp->t_iflag & INPCK)) 168951078Speter recv_data = 0; 169051078Speter } 169151078Speter ++com->bytes_in; 169251078Speter if (com->hotchar != 0 && recv_data == com->hotchar) 169351078Speter setsofttty(); 169451078Speter ioptr = com->iptr; 169551078Speter if (ioptr >= com->ibufend) 169651078Speter CE_RECORD(com, CE_INTERRUPT_BUF_OVERFLOW); 169751078Speter else { 169851078Speter if (com->do_timestamp) 169951078Speter microtime(&com->timestamp); 170051078Speter ++com_events; 170151078Speter schedsofttty(); 170251078Speter#if 0 /* for testing input latency vs efficiency */ 170351078Speterif (com->iptr - com->ibuf == 8) 170451078Speter setsofttty(); 170551078Speter#endif 170651078Speter ioptr[0] = recv_data; 170751078Speter ioptr[com->ierroff] = line_status; 170851078Speter com->iptr = ++ioptr; 170951078Speter if (ioptr == com->ihighwater 171051078Speter && com->state & CS_RTS_IFLOW) 171151078Speter outb(com->modem_ctl_port, 171251078Speter com->mcr_image &= ~MCR_RTS); 171351078Speter if (line_status & LSR_OE) 171451078Speter CE_RECORD(com, CE_OVERRUN); 171551078Speter } 171651078Spetercont: 171751078Speter /* 171851078Speter * "& 0x7F" is to avoid the gcc-1.40 generating a slow 171951078Speter * jump from the top of the loop to here 172051078Speter */ 172151078Speter line_status = inb(com->line_status_port) & 0x7F; 172251078Speter } 172351078Speter 172451078Speter /* modem status change? (always check before doing output) */ 172551078Speter modem_status = inb(com->modem_status_port); 172651078Speter if (modem_status != com->last_modem_status) { 172751078Speter if (com->do_dcd_timestamp 172851078Speter && !(com->last_modem_status & MSR_DCD) 172951078Speter && modem_status & MSR_DCD) 173051078Speter microtime(&com->dcd_timestamp); 173151078Speter 173251078Speter /* 173351078Speter * Schedule high level to handle DCD changes. Note 173451078Speter * that we don't use the delta bits anywhere. Some 173551078Speter * UARTs mess them up, and it's easy to remember the 173651078Speter * previous bits and calculate the delta. 173751078Speter */ 173851078Speter com->last_modem_status = modem_status; 173951078Speter if (!(com->state & CS_CHECKMSR)) { 174051078Speter com_events += LOTS_OF_EVENTS; 174151078Speter com->state |= CS_CHECKMSR; 174251078Speter setsofttty(); 174351078Speter } 174451078Speter 174551078Speter /* handle CTS change immediately for crisp flow ctl */ 174651078Speter if (com->state & CS_CTS_OFLOW) { 174751078Speter if (modem_status & MSR_CTS) 174851078Speter com->state |= CS_ODEVREADY; 174951078Speter else 175051078Speter com->state &= ~CS_ODEVREADY; 175151078Speter } 175251078Speter } 175351078Speter 175451078Speter /* output queued and everything ready? */ 175551078Speter if (line_status & LSR_TXRDY 175651078Speter && com->state >= (CS_BUSY | CS_TTGO | CS_ODEVREADY)) { 175751078Speter ioptr = com->obufq.l_head; 175851078Speter if (com->tx_fifo_size > 1) { 175951078Speter u_int ocount; 176051078Speter 176151078Speter ocount = com->obufq.l_tail - ioptr; 176251078Speter if (ocount > com->tx_fifo_size) 176351078Speter ocount = com->tx_fifo_size; 176451078Speter com->bytes_out += ocount; 176551078Speter do 176651078Speter outb(com->data_port, *ioptr++); 176751078Speter while (--ocount != 0); 176851078Speter } else { 176951078Speter outb(com->data_port, *ioptr++); 177051078Speter ++com->bytes_out; 177151078Speter } 177251078Speter com->obufq.l_head = ioptr; 177351078Speter if (COM_IIR_TXRDYBUG(com->flags)) { 177451078Speter int_ctl_new = int_ctl | IER_ETXRDY; 177551078Speter } 177651078Speter if (ioptr >= com->obufq.l_tail) { 177751078Speter struct lbq *qp; 177851078Speter 177951078Speter qp = com->obufq.l_next; 178051078Speter qp->l_queued = FALSE; 178151078Speter qp = qp->l_next; 178251078Speter if (qp != NULL) { 178351078Speter com->obufq.l_head = qp->l_head; 178451078Speter com->obufq.l_tail = qp->l_tail; 178551078Speter com->obufq.l_next = qp; 178651078Speter } else { 178751078Speter /* output just completed */ 178851078Speter if ( COM_IIR_TXRDYBUG(com->flags) ) { 178951078Speter int_ctl_new = int_ctl & ~IER_ETXRDY; 179051078Speter } 179151078Speter com->state &= ~CS_BUSY; 179251078Speter } 179351078Speter if (!(com->state & CS_ODONE)) { 179451078Speter com_events += LOTS_OF_EVENTS; 179551078Speter com->state |= CS_ODONE; 179651078Speter setsofttty(); /* handle at high level ASAP */ 179751078Speter } 179851078Speter } 179951078Speter if ( COM_IIR_TXRDYBUG(com->flags) && (int_ctl != int_ctl_new)) { 180051078Speter outb(com->intr_ctl_port, int_ctl_new); 180151078Speter } 180251078Speter } 180351078Speter 180451078Speter /* finished? */ 180551078Speter#ifndef COM_MULTIPORT 180651078Speter if ((inb(com->int_id_port) & IIR_IMASK) == IIR_NOPEND) 180751078Speter#endif /* COM_MULTIPORT */ 180851078Speter return; 180951078Speter } 181051078Speter} 181151078Speter 181251078Speterstatic int 181351078Spetersioioctl(dev, cmd, data, flag, p) 181451078Speter dev_t dev; 181551078Speter u_long cmd; 181651078Speter caddr_t data; 181751078Speter int flag; 181851078Speter struct proc *p; 181951078Speter{ 182051078Speter struct com_s *com; 182151078Speter int error; 182251078Speter Port_t iobase; 182351078Speter int mynor; 182451078Speter int s; 182551078Speter struct tty *tp; 182651078Speter#if defined(COMPAT_43) || defined(COMPAT_SUNOS) 182751078Speter u_long oldcmd; 182851078Speter struct termios term; 182951078Speter#endif 183051078Speter 183151078Speter mynor = minor(dev); 183251078Speter com = com_addr(MINOR_TO_UNIT(mynor)); 183351078Speter if (com->gone) 183451078Speter return (ENODEV); 183551078Speter iobase = com->iobase; 183651078Speter if (mynor & CONTROL_MASK) { 183751078Speter struct termios *ct; 183851078Speter 183951078Speter switch (mynor & CONTROL_MASK) { 184051078Speter case CONTROL_INIT_STATE: 184151078Speter ct = mynor & CALLOUT_MASK ? &com->it_out : &com->it_in; 184251078Speter break; 184351078Speter case CONTROL_LOCK_STATE: 184451078Speter ct = mynor & CALLOUT_MASK ? &com->lt_out : &com->lt_in; 184551078Speter break; 184651078Speter default: 184751078Speter return (ENODEV); /* /dev/nodev */ 184851078Speter } 184951078Speter switch (cmd) { 185051078Speter case TIOCSETA: 185151078Speter error = suser(p); 185251078Speter if (error != 0) 185351078Speter return (error); 185451078Speter *ct = *(struct termios *)data; 185551078Speter return (0); 185651078Speter case TIOCGETA: 185751078Speter *(struct termios *)data = *ct; 185851078Speter return (0); 185951078Speter case TIOCGETD: 186051078Speter *(int *)data = TTYDISC; 186151078Speter return (0); 186251078Speter case TIOCGWINSZ: 186351078Speter bzero(data, sizeof(struct winsize)); 186451078Speter return (0); 186551078Speter default: 186651078Speter return (ENOTTY); 186751078Speter } 186851078Speter } 186951078Speter tp = com->tp; 187051078Speter#if defined(COMPAT_43) || defined(COMPAT_SUNOS) 187151078Speter term = tp->t_termios; 187251078Speter oldcmd = cmd; 187351078Speter error = ttsetcompat(tp, &cmd, data, &term); 187451078Speter if (error != 0) 187551078Speter return (error); 187651078Speter if (cmd != oldcmd) 187751078Speter data = (caddr_t)&term; 187851078Speter#endif 187951078Speter if (cmd == TIOCSETA || cmd == TIOCSETAW || cmd == TIOCSETAF) { 188051078Speter int cc; 188151078Speter struct termios *dt = (struct termios *)data; 188251078Speter struct termios *lt = mynor & CALLOUT_MASK 188351078Speter ? &com->lt_out : &com->lt_in; 188451078Speter 188551078Speter dt->c_iflag = (tp->t_iflag & lt->c_iflag) 188651078Speter | (dt->c_iflag & ~lt->c_iflag); 188751078Speter dt->c_oflag = (tp->t_oflag & lt->c_oflag) 188851078Speter | (dt->c_oflag & ~lt->c_oflag); 188951078Speter dt->c_cflag = (tp->t_cflag & lt->c_cflag) 189051078Speter | (dt->c_cflag & ~lt->c_cflag); 189151078Speter dt->c_lflag = (tp->t_lflag & lt->c_lflag) 189251078Speter | (dt->c_lflag & ~lt->c_lflag); 189351078Speter for (cc = 0; cc < NCCS; ++cc) 189451078Speter if (lt->c_cc[cc] != 0) 189551078Speter dt->c_cc[cc] = tp->t_cc[cc]; 189651078Speter if (lt->c_ispeed != 0) 189751078Speter dt->c_ispeed = tp->t_ispeed; 189851078Speter if (lt->c_ospeed != 0) 189951078Speter dt->c_ospeed = tp->t_ospeed; 190051078Speter } 190151078Speter error = (*linesw[tp->t_line].l_ioctl)(tp, cmd, data, flag, p); 190251078Speter if (error != ENOIOCTL) 190351078Speter return (error); 190451078Speter s = spltty(); 190551078Speter error = ttioctl(tp, cmd, data, flag); 190651078Speter disc_optim(tp, &tp->t_termios, com); 190751078Speter if (error != ENOIOCTL) { 190851078Speter splx(s); 190951078Speter return (error); 191051078Speter } 191151078Speter switch (cmd) { 191251078Speter case TIOCSBRK: 191351078Speter outb(iobase + com_cfcr, com->cfcr_image |= CFCR_SBREAK); 191451078Speter break; 191551078Speter case TIOCCBRK: 191651078Speter outb(iobase + com_cfcr, com->cfcr_image &= ~CFCR_SBREAK); 191751078Speter break; 191851078Speter case TIOCSDTR: 191951078Speter (void)commctl(com, TIOCM_DTR, DMBIS); 192051078Speter break; 192151078Speter case TIOCCDTR: 192251078Speter (void)commctl(com, TIOCM_DTR, DMBIC); 192351078Speter break; 192451078Speter /* 192551078Speter * XXX should disallow changing MCR_RTS if CS_RTS_IFLOW is set. The 192651078Speter * changes get undone on the next call to comparam(). 192751078Speter */ 192851078Speter case TIOCMSET: 192951078Speter (void)commctl(com, *(int *)data, DMSET); 193051078Speter break; 193151078Speter case TIOCMBIS: 193251078Speter (void)commctl(com, *(int *)data, DMBIS); 193351078Speter break; 193451078Speter case TIOCMBIC: 193551078Speter (void)commctl(com, *(int *)data, DMBIC); 193651078Speter break; 193751078Speter case TIOCMGET: 193851078Speter *(int *)data = commctl(com, 0, DMGET); 193951078Speter break; 194051078Speter case TIOCMSDTRWAIT: 194151078Speter /* must be root since the wait applies to following logins */ 194251078Speter error = suser(p); 194351078Speter if (error != 0) { 194451078Speter splx(s); 194551078Speter return (error); 194651078Speter } 194751078Speter com->dtr_wait = *(int *)data * hz / 100; 194851078Speter break; 194951078Speter case TIOCMGDTRWAIT: 195051078Speter *(int *)data = com->dtr_wait * 100 / hz; 195151078Speter break; 195251078Speter case TIOCTIMESTAMP: 195351078Speter com->do_timestamp = TRUE; 195451078Speter *(struct timeval *)data = com->timestamp; 195551078Speter break; 195651078Speter case TIOCDCDTIMESTAMP: 195751078Speter com->do_dcd_timestamp = TRUE; 195851078Speter *(struct timeval *)data = com->dcd_timestamp; 195951078Speter break; 196051078Speter default: 196151078Speter splx(s); 196251078Speter error = pps_ioctl(cmd, data, &com->pps); 196351078Speter if (error == ENODEV) 196451078Speter error = ENOTTY; 196551078Speter return (error); 196651078Speter } 196751078Speter splx(s); 196851078Speter return (0); 196951078Speter} 197051078Speter 197151078Speterstatic void 197251078Spetersiopoll() 197351078Speter{ 197451078Speter int unit; 197551078Speter 197651078Speter if (com_events == 0) 197751078Speter return; 197851078Speterrepeat: 197951078Speter for (unit = 0; unit < NSIOTOT; ++unit) { 198051078Speter struct com_s *com; 198151078Speter int incc; 198251078Speter struct tty *tp; 198351078Speter 198451078Speter com = com_addr(unit); 198551078Speter if (com == NULL) 198651078Speter continue; 198751078Speter tp = com->tp; 198851078Speter if (tp == NULL || com->gone) { 198951078Speter /* 199051078Speter * Discard any events related to never-opened or 199151078Speter * going-away devices. 199251078Speter */ 199351078Speter disable_intr(); 199451078Speter incc = com->iptr - com->ibuf; 199551078Speter com->iptr = com->ibuf; 199651078Speter if (com->state & CS_CHECKMSR) { 199751078Speter incc += LOTS_OF_EVENTS; 199851078Speter com->state &= ~CS_CHECKMSR; 199951078Speter } 200051078Speter com_events -= incc; 200151078Speter enable_intr(); 200251078Speter continue; 200351078Speter } 200451078Speter if (com->iptr != com->ibuf) { 200551078Speter disable_intr(); 200651078Speter sioinput(com); 200751078Speter enable_intr(); 200851078Speter } 200951078Speter if (com->state & CS_CHECKMSR) { 201051078Speter u_char delta_modem_status; 201151078Speter 201251078Speter disable_intr(); 201351078Speter delta_modem_status = com->last_modem_status 201451078Speter ^ com->prev_modem_status; 201551078Speter com->prev_modem_status = com->last_modem_status; 201651078Speter com_events -= LOTS_OF_EVENTS; 201751078Speter com->state &= ~CS_CHECKMSR; 201851078Speter enable_intr(); 201951078Speter if (delta_modem_status & MSR_DCD) 202051078Speter (*linesw[tp->t_line].l_modem) 202151078Speter (tp, com->prev_modem_status & MSR_DCD); 202251078Speter } 202351078Speter if (com->state & CS_ODONE) { 202451078Speter disable_intr(); 202551078Speter com_events -= LOTS_OF_EVENTS; 202651078Speter com->state &= ~CS_ODONE; 202751078Speter enable_intr(); 202851078Speter if (!(com->state & CS_BUSY) 202951078Speter && !(com->extra_state & CSE_BUSYCHECK)) { 203051078Speter timeout(siobusycheck, com, hz / 100); 203151078Speter com->extra_state |= CSE_BUSYCHECK; 203251078Speter } 203351078Speter (*linesw[tp->t_line].l_start)(tp); 203451078Speter } 203551078Speter if (com_events == 0) 203651078Speter break; 203751078Speter } 203851078Speter if (com_events >= LOTS_OF_EVENTS) 203951078Speter goto repeat; 204051078Speter} 204151078Speter 204251078Speterstatic int 204351078Spetercomparam(tp, t) 204451078Speter struct tty *tp; 204551078Speter struct termios *t; 204651078Speter{ 204751078Speter u_int cfcr; 204851078Speter int cflag; 204951078Speter struct com_s *com; 205051078Speter int divisor; 205151078Speter u_char dlbh; 205251078Speter u_char dlbl; 205351078Speter Port_t iobase; 205451078Speter int s; 205551078Speter int unit; 205651078Speter 205751078Speter /* do historical conversions */ 205851078Speter if (t->c_ispeed == 0) 205951078Speter t->c_ispeed = t->c_ospeed; 206051078Speter 206151078Speter /* check requested parameters */ 206251078Speter divisor = ttspeedtab(t->c_ospeed, comspeedtab); 206351078Speter if (divisor < 0 || (divisor > 0 && t->c_ispeed != t->c_ospeed)) 206451078Speter return (EINVAL); 206551078Speter 206651078Speter /* parameters are OK, convert them to the com struct and the device */ 206751078Speter unit = DEV_TO_UNIT(tp->t_dev); 206851078Speter com = com_addr(unit); 206951078Speter iobase = com->iobase; 207051078Speter s = spltty(); 207151078Speter if (divisor == 0) 207251078Speter (void)commctl(com, TIOCM_DTR, DMBIC); /* hang up line */ 207351078Speter else 207451078Speter (void)commctl(com, TIOCM_DTR, DMBIS); 207551078Speter cflag = t->c_cflag; 207651078Speter switch (cflag & CSIZE) { 207751078Speter case CS5: 207851078Speter cfcr = CFCR_5BITS; 207951078Speter break; 208051078Speter case CS6: 208151078Speter cfcr = CFCR_6BITS; 208251078Speter break; 208351078Speter case CS7: 208451078Speter cfcr = CFCR_7BITS; 208551078Speter break; 208651078Speter default: 208751078Speter cfcr = CFCR_8BITS; 208851078Speter break; 208951078Speter } 209051078Speter if (cflag & PARENB) { 209151078Speter cfcr |= CFCR_PENAB; 209251078Speter if (!(cflag & PARODD)) 209351078Speter cfcr |= CFCR_PEVEN; 209451078Speter } 209551078Speter if (cflag & CSTOPB) 209651078Speter cfcr |= CFCR_STOPB; 209751078Speter 209851078Speter if (com->hasfifo && divisor != 0) { 209951078Speter /* 210051078Speter * Use a fifo trigger level low enough so that the input 210151078Speter * latency from the fifo is less than about 16 msec and 210251078Speter * the total latency is less than about 30 msec. These 210351078Speter * latencies are reasonable for humans. Serial comms 210451078Speter * protocols shouldn't expect anything better since modem 210551078Speter * latencies are larger. 210651078Speter */ 210751078Speter com->fifo_image = t->c_ospeed <= 4800 210851078Speter ? FIFO_ENABLE : FIFO_ENABLE | FIFO_RX_HIGH; 210951078Speter#ifdef COM_ESP 211051078Speter /* 211151078Speter * The Hayes ESP card needs the fifo DMA mode bit set 211251078Speter * in compatibility mode. If not, it will interrupt 211351078Speter * for each character received. 211451078Speter */ 211551078Speter if (com->esp) 211651078Speter com->fifo_image |= FIFO_DMA_MODE; 211751078Speter#endif 211851078Speter outb(iobase + com_fifo, com->fifo_image); 211951078Speter } 212051078Speter 212151078Speter /* 212251078Speter * This returns with interrupts disabled so that we can complete 212351078Speter * the speed change atomically. Keeping interrupts disabled is 212451078Speter * especially important while com_data is hidden. 212551078Speter */ 212651078Speter (void) siosetwater(com, t->c_ispeed); 212751078Speter 212851078Speter if (divisor != 0) { 212951078Speter outb(iobase + com_cfcr, cfcr | CFCR_DLAB); 213051078Speter /* 213151078Speter * Only set the divisor registers if they would change, 213251078Speter * since on some 16550 incompatibles (UMC8669F), setting 213351078Speter * them while input is arriving them loses sync until 213451078Speter * data stops arriving. 213551078Speter */ 213651078Speter dlbl = divisor & 0xFF; 213751078Speter if (inb(iobase + com_dlbl) != dlbl) 213851078Speter outb(iobase + com_dlbl, dlbl); 213951078Speter dlbh = (u_int) divisor >> 8; 214051078Speter if (inb(iobase + com_dlbh) != dlbh) 214151078Speter outb(iobase + com_dlbh, dlbh); 214251078Speter } 214351078Speter 214451078Speter 214551078Speter outb(iobase + com_cfcr, com->cfcr_image = cfcr); 214651078Speter 214751078Speter if (!(tp->t_state & TS_TTSTOP)) 214851078Speter com->state |= CS_TTGO; 214951078Speter 215051078Speter if (cflag & CRTS_IFLOW) { 215151078Speter if (com->st16650a) { 215251078Speter outb(iobase + com_cfcr, 0xbf); 215351078Speter outb(iobase + com_fifo, inb(iobase + com_fifo) | 0x40); 215451078Speter } 215551078Speter com->state |= CS_RTS_IFLOW; 215651078Speter /* 215751078Speter * If CS_RTS_IFLOW just changed from off to on, the change 215851078Speter * needs to be propagated to MCR_RTS. This isn't urgent, 215951078Speter * so do it later by calling comstart() instead of repeating 216051078Speter * a lot of code from comstart() here. 216151078Speter */ 216251078Speter } else if (com->state & CS_RTS_IFLOW) { 216351078Speter com->state &= ~CS_RTS_IFLOW; 216451078Speter /* 216551078Speter * CS_RTS_IFLOW just changed from on to off. Force MCR_RTS 216651078Speter * on here, since comstart() won't do it later. 216751078Speter */ 216851078Speter outb(com->modem_ctl_port, com->mcr_image |= MCR_RTS); 216951078Speter if (com->st16650a) { 217051078Speter outb(iobase + com_cfcr, 0xbf); 217151078Speter outb(iobase + com_fifo, inb(iobase + com_fifo) & ~0x40); 217251078Speter } 217351078Speter } 217451078Speter 217551078Speter 217651078Speter /* 217751078Speter * Set up state to handle output flow control. 217851078Speter * XXX - worth handling MDMBUF (DCD) flow control at the lowest level? 217951078Speter * Now has 10+ msec latency, while CTS flow has 50- usec latency. 218051078Speter */ 218151078Speter com->state |= CS_ODEVREADY; 218251078Speter com->state &= ~CS_CTS_OFLOW; 218351078Speter if (cflag & CCTS_OFLOW) { 218451078Speter com->state |= CS_CTS_OFLOW; 218551078Speter if (!(com->last_modem_status & MSR_CTS)) 218651078Speter com->state &= ~CS_ODEVREADY; 218751078Speter if (com->st16650a) { 218851078Speter outb(iobase + com_cfcr, 0xbf); 218951078Speter outb(iobase + com_fifo, inb(iobase + com_fifo) | 0x80); 219051078Speter } 219151078Speter } else { 219251078Speter if (com->st16650a) { 219351078Speter outb(iobase + com_cfcr, 0xbf); 219451078Speter outb(iobase + com_fifo, inb(iobase + com_fifo) & ~0x80); 219551078Speter } 219651078Speter } 219751078Speter 219851078Speter 219951078Speter outb(iobase + com_cfcr, com->cfcr_image); 220051078Speter 220151078Speter 220251078Speter /* XXX shouldn't call functions while intrs are disabled. */ 220351078Speter disc_optim(tp, t, com); 220451078Speter /* 220551078Speter * Recover from fiddling with CS_TTGO. We used to call siointr1() 220651078Speter * unconditionally, but that defeated the careful discarding of 220751078Speter * stale input in sioopen(). 220851078Speter */ 220951078Speter if (com->state >= (CS_BUSY | CS_TTGO)) 221051078Speter siointr1(com); 221151078Speter 221251078Speter enable_intr(); 221351078Speter splx(s); 221451078Speter comstart(tp); 221551078Speter if (com->ibufold != NULL) { 221651078Speter free(com->ibufold, M_DEVBUF); 221751078Speter com->ibufold = NULL; 221851078Speter } 221951078Speter return (0); 222051078Speter} 222151078Speter 222251078Speterstatic int 222351078Spetersiosetwater(com, speed) 222451078Speter struct com_s *com; 222551078Speter speed_t speed; 222651078Speter{ 222751078Speter int cp4ticks; 222851078Speter u_char *ibuf; 222951078Speter int ibufsize; 223051078Speter struct tty *tp; 223151078Speter 223251078Speter /* 223351078Speter * Make the buffer size large enough to handle a softtty interrupt 223451078Speter * latency of about 2 ticks without loss of throughput or data 223551078Speter * (about 3 ticks if input flow control is not used or not honoured, 223651078Speter * but a bit less for CS5-CS7 modes). 223751078Speter */ 223851078Speter cp4ticks = speed / 10 / hz * 4; 223951078Speter for (ibufsize = 128; ibufsize < cp4ticks;) 224051078Speter ibufsize <<= 1; 224151078Speter if (ibufsize == com->ibufsize) { 224251078Speter disable_intr(); 224351078Speter return (0); 224451078Speter } 224551078Speter 224651078Speter /* 224751078Speter * Allocate input buffer. The extra factor of 2 in the size is 224851078Speter * to allow for an error byte for each input byte. 224951078Speter */ 225051078Speter ibuf = malloc(2 * ibufsize, M_DEVBUF, M_NOWAIT); 225151078Speter if (ibuf == NULL) { 225251078Speter disable_intr(); 225351078Speter return (ENOMEM); 225451078Speter } 225551078Speter 225651078Speter /* Initialize non-critical variables. */ 225751078Speter com->ibufold = com->ibuf; 225851078Speter com->ibufsize = ibufsize; 225951078Speter tp = com->tp; 226051078Speter if (tp != NULL) { 226151078Speter tp->t_ififosize = 2 * ibufsize; 226251078Speter tp->t_ispeedwat = (speed_t)-1; 226351078Speter tp->t_ospeedwat = (speed_t)-1; 226451078Speter } 226551078Speter 226651078Speter /* 226751078Speter * Read current input buffer, if any. Continue with interrupts 226851078Speter * disabled. 226951078Speter */ 227051078Speter disable_intr(); 227151078Speter if (com->iptr != com->ibuf) 227251078Speter sioinput(com); 227351078Speter 227451078Speter /*- 227551078Speter * Initialize critical variables, including input buffer watermarks. 227651078Speter * The external device is asked to stop sending when the buffer 227751078Speter * exactly reaches high water, or when the high level requests it. 227851078Speter * The high level is notified immediately (rather than at a later 227951078Speter * clock tick) when this watermark is reached. 228051078Speter * The buffer size is chosen so the watermark should almost never 228151078Speter * be reached. 228251078Speter * The low watermark is invisibly 0 since the buffer is always 228351078Speter * emptied all at once. 228451078Speter */ 228551078Speter com->iptr = com->ibuf = ibuf; 228651078Speter com->ibufend = ibuf + ibufsize; 228751078Speter com->ierroff = ibufsize; 228851078Speter com->ihighwater = ibuf + 3 * ibufsize / 4; 228951078Speter return (0); 229051078Speter} 229151078Speter 229251078Speterstatic void 229351078Spetercomstart(tp) 229451078Speter struct tty *tp; 229551078Speter{ 229651078Speter struct com_s *com; 229751078Speter int s; 229851078Speter int unit; 229951078Speter 230051078Speter unit = DEV_TO_UNIT(tp->t_dev); 230151078Speter com = com_addr(unit); 230251078Speter s = spltty(); 230351078Speter disable_intr(); 230451078Speter if (tp->t_state & TS_TTSTOP) 230551078Speter com->state &= ~CS_TTGO; 230651078Speter else 230751078Speter com->state |= CS_TTGO; 230851078Speter if (tp->t_state & TS_TBLOCK) { 230951078Speter if (com->mcr_image & MCR_RTS && com->state & CS_RTS_IFLOW) 231051078Speter outb(com->modem_ctl_port, com->mcr_image &= ~MCR_RTS); 231151078Speter } else { 231251078Speter if (!(com->mcr_image & MCR_RTS) && com->iptr < com->ihighwater 231351078Speter && com->state & CS_RTS_IFLOW) 231451078Speter outb(com->modem_ctl_port, com->mcr_image |= MCR_RTS); 231551078Speter } 231651078Speter enable_intr(); 231751078Speter if (tp->t_state & (TS_TIMEOUT | TS_TTSTOP)) { 231851078Speter ttwwakeup(tp); 231951078Speter splx(s); 232051078Speter return; 232151078Speter } 232251078Speter if (tp->t_outq.c_cc != 0) { 232351078Speter struct lbq *qp; 232451078Speter struct lbq *next; 232551078Speter 232651078Speter if (!com->obufs[0].l_queued) { 232751078Speter com->obufs[0].l_tail 232851078Speter = com->obuf1 + q_to_b(&tp->t_outq, com->obuf1, 232951078Speter sizeof com->obuf1); 233051078Speter com->obufs[0].l_next = NULL; 233151078Speter com->obufs[0].l_queued = TRUE; 233251078Speter disable_intr(); 233351078Speter if (com->state & CS_BUSY) { 233451078Speter qp = com->obufq.l_next; 233551078Speter while ((next = qp->l_next) != NULL) 233651078Speter qp = next; 233751078Speter qp->l_next = &com->obufs[0]; 233851078Speter } else { 233951078Speter com->obufq.l_head = com->obufs[0].l_head; 234051078Speter com->obufq.l_tail = com->obufs[0].l_tail; 234151078Speter com->obufq.l_next = &com->obufs[0]; 234251078Speter com->state |= CS_BUSY; 234351078Speter } 234451078Speter enable_intr(); 234551078Speter } 234651078Speter if (tp->t_outq.c_cc != 0 && !com->obufs[1].l_queued) { 234751078Speter com->obufs[1].l_tail 234851078Speter = com->obuf2 + q_to_b(&tp->t_outq, com->obuf2, 234951078Speter sizeof com->obuf2); 235051078Speter com->obufs[1].l_next = NULL; 235151078Speter com->obufs[1].l_queued = TRUE; 235251078Speter disable_intr(); 235351078Speter if (com->state & CS_BUSY) { 235451078Speter qp = com->obufq.l_next; 235551078Speter while ((next = qp->l_next) != NULL) 235651078Speter qp = next; 235751078Speter qp->l_next = &com->obufs[1]; 235851078Speter } else { 235951078Speter com->obufq.l_head = com->obufs[1].l_head; 236051078Speter com->obufq.l_tail = com->obufs[1].l_tail; 236151078Speter com->obufq.l_next = &com->obufs[1]; 236251078Speter com->state |= CS_BUSY; 236351078Speter } 236451078Speter enable_intr(); 236551078Speter } 236651078Speter tp->t_state |= TS_BUSY; 236751078Speter } 236851078Speter disable_intr(); 236951078Speter if (com->state >= (CS_BUSY | CS_TTGO)) 237051078Speter siointr1(com); /* fake interrupt to start output */ 237151078Speter enable_intr(); 237251078Speter ttwwakeup(tp); 237351078Speter splx(s); 237451078Speter} 237551078Speter 237651078Speterstatic void 237751654Sphkcomstop(tp, rw) 237851078Speter struct tty *tp; 237951078Speter int rw; 238051078Speter{ 238151078Speter struct com_s *com; 238251078Speter 238351078Speter com = com_addr(DEV_TO_UNIT(tp->t_dev)); 238451078Speter if (com->gone) 238551078Speter return; 238651078Speter disable_intr(); 238751078Speter if (rw & FWRITE) { 238851078Speter if (com->hasfifo) 238951078Speter#ifdef COM_ESP 239051078Speter /* XXX avoid h/w bug. */ 239151078Speter if (!com->esp) 239251078Speter#endif 239351078Speter outb(com->iobase + com_fifo, 239451078Speter FIFO_XMT_RST | com->fifo_image); 239551078Speter com->obufs[0].l_queued = FALSE; 239651078Speter com->obufs[1].l_queued = FALSE; 239751078Speter if (com->state & CS_ODONE) 239851078Speter com_events -= LOTS_OF_EVENTS; 239951078Speter com->state &= ~(CS_ODONE | CS_BUSY); 240051078Speter com->tp->t_state &= ~TS_BUSY; 240151078Speter } 240251078Speter if (rw & FREAD) { 240351078Speter if (com->hasfifo) 240451078Speter#ifdef COM_ESP 240551078Speter /* XXX avoid h/w bug. */ 240651078Speter if (!com->esp) 240751078Speter#endif 240851078Speter outb(com->iobase + com_fifo, 240951078Speter FIFO_RCV_RST | com->fifo_image); 241051078Speter com_events -= (com->iptr - com->ibuf); 241151078Speter com->iptr = com->ibuf; 241251078Speter } 241351078Speter enable_intr(); 241451078Speter comstart(tp); 241551078Speter} 241651078Speter 241751078Speterstatic int 241851078Spetercommctl(com, bits, how) 241951078Speter struct com_s *com; 242051078Speter int bits; 242151078Speter int how; 242251078Speter{ 242351078Speter int mcr; 242451078Speter int msr; 242551078Speter 242651078Speter if (how == DMGET) { 242751078Speter bits = TIOCM_LE; /* XXX - always enabled while open */ 242851078Speter mcr = com->mcr_image; 242951078Speter if (mcr & MCR_DTR) 243051078Speter bits |= TIOCM_DTR; 243151078Speter if (mcr & MCR_RTS) 243251078Speter bits |= TIOCM_RTS; 243351078Speter msr = com->prev_modem_status; 243451078Speter if (msr & MSR_CTS) 243551078Speter bits |= TIOCM_CTS; 243651078Speter if (msr & MSR_DCD) 243751078Speter bits |= TIOCM_CD; 243851078Speter if (msr & MSR_DSR) 243951078Speter bits |= TIOCM_DSR; 244051078Speter /* 244151078Speter * XXX - MSR_RI is naturally volatile, and we make MSR_TERI 244251078Speter * more volatile by reading the modem status a lot. Perhaps 244351078Speter * we should latch both bits until the status is read here. 244451078Speter */ 244551078Speter if (msr & (MSR_RI | MSR_TERI)) 244651078Speter bits |= TIOCM_RI; 244751078Speter return (bits); 244851078Speter } 244951078Speter mcr = 0; 245051078Speter if (bits & TIOCM_DTR) 245151078Speter mcr |= MCR_DTR; 245251078Speter if (bits & TIOCM_RTS) 245351078Speter mcr |= MCR_RTS; 245451078Speter if (com->gone) 245551078Speter return(0); 245651078Speter disable_intr(); 245751078Speter switch (how) { 245851078Speter case DMSET: 245951078Speter outb(com->modem_ctl_port, 246051078Speter com->mcr_image = mcr | (com->mcr_image & MCR_IENABLE)); 246151078Speter break; 246251078Speter case DMBIS: 246351078Speter outb(com->modem_ctl_port, com->mcr_image |= mcr); 246451078Speter break; 246551078Speter case DMBIC: 246651078Speter outb(com->modem_ctl_port, com->mcr_image &= ~mcr); 246751078Speter break; 246851078Speter } 246951078Speter enable_intr(); 247051078Speter return (0); 247151078Speter} 247251078Speter 247351078Speterstatic void 247451078Spetersiosettimeout() 247551078Speter{ 247651078Speter struct com_s *com; 247751078Speter bool_t someopen; 247851078Speter int unit; 247951078Speter 248051078Speter /* 248151078Speter * Set our timeout period to 1 second if no polled devices are open. 248251078Speter * Otherwise set it to max(1/200, 1/hz). 248351078Speter * Enable timeouts iff some device is open. 248451078Speter */ 248551078Speter untimeout(comwakeup, (void *)NULL, sio_timeout_handle); 248651078Speter sio_timeout = hz; 248751078Speter someopen = FALSE; 248851078Speter for (unit = 0; unit < NSIOTOT; ++unit) { 248951078Speter com = com_addr(unit); 249051078Speter if (com != NULL && com->tp != NULL 249151078Speter && com->tp->t_state & TS_ISOPEN && !com->gone) { 249251078Speter someopen = TRUE; 249351078Speter if (com->poll || com->poll_output) { 249451078Speter sio_timeout = hz > 200 ? hz / 200 : 1; 249551078Speter break; 249651078Speter } 249751078Speter } 249851078Speter } 249951078Speter if (someopen) { 250051078Speter sio_timeouts_until_log = hz / sio_timeout; 250151078Speter sio_timeout_handle = timeout(comwakeup, (void *)NULL, 250251078Speter sio_timeout); 250351078Speter } else { 250451078Speter /* Flush error messages, if any. */ 250551078Speter sio_timeouts_until_log = 1; 250651078Speter comwakeup((void *)NULL); 250751078Speter untimeout(comwakeup, (void *)NULL, sio_timeout_handle); 250851078Speter } 250951078Speter} 251051078Speter 251151078Speterstatic void 251251078Spetercomwakeup(chan) 251351078Speter void *chan; 251451078Speter{ 251551078Speter struct com_s *com; 251651078Speter int unit; 251751078Speter 251851078Speter sio_timeout_handle = timeout(comwakeup, (void *)NULL, sio_timeout); 251951078Speter 252051078Speter /* 252151078Speter * Recover from lost output interrupts. 252251078Speter * Poll any lines that don't use interrupts. 252351078Speter */ 252451078Speter for (unit = 0; unit < NSIOTOT; ++unit) { 252551078Speter com = com_addr(unit); 252651078Speter if (com != NULL && !com->gone 252751078Speter && (com->state >= (CS_BUSY | CS_TTGO) || com->poll)) { 252851078Speter disable_intr(); 252951078Speter siointr1(com); 253051078Speter enable_intr(); 253151078Speter } 253251078Speter } 253351078Speter 253451078Speter /* 253551078Speter * Check for and log errors, but not too often. 253651078Speter */ 253751078Speter if (--sio_timeouts_until_log > 0) 253851078Speter return; 253951078Speter sio_timeouts_until_log = hz / sio_timeout; 254051078Speter for (unit = 0; unit < NSIOTOT; ++unit) { 254151078Speter int errnum; 254251078Speter 254351078Speter com = com_addr(unit); 254451078Speter if (com == NULL) 254551078Speter continue; 254651078Speter if (com->gone) 254751078Speter continue; 254851078Speter for (errnum = 0; errnum < CE_NTYPES; ++errnum) { 254951078Speter u_int delta; 255051078Speter u_long total; 255151078Speter 255251078Speter disable_intr(); 255351078Speter delta = com->delta_error_counts[errnum]; 255451078Speter com->delta_error_counts[errnum] = 0; 255551078Speter enable_intr(); 255651078Speter if (delta == 0) 255751078Speter continue; 255851078Speter total = com->error_counts[errnum] += delta; 255951078Speter log(LOG_ERR, "sio%d: %u more %s%s (total %lu)\n", 256051078Speter unit, delta, error_desc[errnum], 256151078Speter delta == 1 ? "" : "s", total); 256251078Speter } 256351078Speter } 256451078Speter} 256551078Speter 256651078Speterstatic void 256751078Speterdisc_optim(tp, t, com) 256851078Speter struct tty *tp; 256951078Speter struct termios *t; 257051078Speter struct com_s *com; 257151078Speter{ 257251078Speter if (!(t->c_iflag & (ICRNL | IGNCR | IMAXBEL | INLCR | ISTRIP | IXON)) 257351078Speter && (!(t->c_iflag & BRKINT) || (t->c_iflag & IGNBRK)) 257451078Speter && (!(t->c_iflag & PARMRK) 257551078Speter || (t->c_iflag & (IGNPAR | IGNBRK)) == (IGNPAR | IGNBRK)) 257651078Speter && !(t->c_lflag & (ECHO | ICANON | IEXTEN | ISIG | PENDIN)) 257751078Speter && linesw[tp->t_line].l_rint == ttyinput) 257851078Speter tp->t_state |= TS_CAN_BYPASS_L_RINT; 257951078Speter else 258051078Speter tp->t_state &= ~TS_CAN_BYPASS_L_RINT; 258151078Speter com->hotchar = linesw[tp->t_line].l_hotchar; 258251078Speter} 258351078Speter 258451078Speter/* 258551078Speter * Following are all routines needed for SIO to act as console 258651078Speter */ 258751078Speter#include <sys/cons.h> 258851078Speter 258951078Speterstruct siocnstate { 259051078Speter u_char dlbl; 259151078Speter u_char dlbh; 259251078Speter u_char ier; 259351078Speter u_char cfcr; 259451078Speter u_char mcr; 259551078Speter}; 259651078Speter 259751078Speterstatic speed_t siocngetspeed __P((Port_t, struct speedtab *)); 259851078Speterstatic void siocnclose __P((struct siocnstate *sp, Port_t iobase)); 259951078Speterstatic void siocnopen __P((struct siocnstate *sp, Port_t iobase, int speed)); 260051078Speterstatic void siocntxwait __P((Port_t iobase)); 260151078Speter 260251078Speterstatic cn_probe_t siocnprobe; 260351078Speterstatic cn_init_t siocninit; 260451078Speterstatic cn_checkc_t siocncheckc; 260551078Speterstatic cn_getc_t siocngetc; 260651078Speterstatic cn_putc_t siocnputc; 260751078Speter 260851078Speter#ifdef __i386__ 260951078SpeterCONS_DRIVER(sio, siocnprobe, siocninit, NULL, siocngetc, siocncheckc, siocnputc); 261051078Speter 261151078Speter#endif 261251078Speter 261351078Speter/* To get the GDB related variables */ 261451078Speter#if DDB > 0 261551078Speter#include <ddb/ddb.h> 261651078Speter#endif 261751078Speter 261851078Speterstatic void 261951078Spetersiocntxwait(iobase) 262051078Speter Port_t iobase; 262151078Speter{ 262251078Speter int timo; 262351078Speter 262451078Speter /* 262551078Speter * Wait for any pending transmission to finish. Required to avoid 262651078Speter * the UART lockup bug when the speed is changed, and for normal 262751078Speter * transmits. 262851078Speter */ 262951078Speter timo = 100000; 263051078Speter while ((inb(iobase + com_lsr) & (LSR_TSRE | LSR_TXRDY)) 263151078Speter != (LSR_TSRE | LSR_TXRDY) && --timo != 0) 263251078Speter ; 263351078Speter} 263451078Speter 263551078Speter/* 263651078Speter * Read the serial port specified and try to figure out what speed 263751078Speter * it's currently running at. We're assuming the serial port has 263851078Speter * been initialized and is basicly idle. This routine is only intended 263951078Speter * to be run at system startup. 264051078Speter * 264151078Speter * If the value read from the serial port doesn't make sense, return 0. 264251078Speter */ 264351078Speter 264451078Speterstatic speed_t 264551078Spetersiocngetspeed(iobase, table) 264651078Speter Port_t iobase; 264751078Speter struct speedtab *table; 264851078Speter{ 264951078Speter int code; 265051078Speter u_char dlbh; 265151078Speter u_char dlbl; 265251078Speter u_char cfcr; 265351078Speter 265451078Speter cfcr = inb(iobase + com_cfcr); 265551078Speter outb(iobase + com_cfcr, CFCR_DLAB | cfcr); 265651078Speter 265751078Speter dlbl = inb(iobase + com_dlbl); 265851078Speter dlbh = inb(iobase + com_dlbh); 265951078Speter 266051078Speter outb(iobase + com_cfcr, cfcr); 266151078Speter 266251078Speter code = dlbh << 8 | dlbl; 266351078Speter 266451078Speter for ( ; table->sp_speed != -1; table++) 266551078Speter if (table->sp_code == code) 266651078Speter return (table->sp_speed); 266751078Speter 266851078Speter return 0; /* didn't match anything sane */ 266951078Speter} 267051078Speter 267151078Speterstatic void 267251078Spetersiocnopen(sp, iobase, speed) 267351078Speter struct siocnstate *sp; 267451078Speter Port_t iobase; 267551078Speter int speed; 267651078Speter{ 267751078Speter int divisor; 267851078Speter u_char dlbh; 267951078Speter u_char dlbl; 268051078Speter 268151078Speter /* 268251078Speter * Save all the device control registers except the fifo register 268351078Speter * and set our default ones (cs8 -parenb speed=comdefaultrate). 268451078Speter * We can't save the fifo register since it is read-only. 268551078Speter */ 268651078Speter sp->ier = inb(iobase + com_ier); 268751078Speter outb(iobase + com_ier, 0); /* spltty() doesn't stop siointr() */ 268851078Speter siocntxwait(iobase); 268951078Speter sp->cfcr = inb(iobase + com_cfcr); 269051078Speter outb(iobase + com_cfcr, CFCR_DLAB | CFCR_8BITS); 269151078Speter sp->dlbl = inb(iobase + com_dlbl); 269251078Speter sp->dlbh = inb(iobase + com_dlbh); 269351078Speter /* 269451078Speter * Only set the divisor registers if they would change, since on 269551078Speter * some 16550 incompatibles (Startech), setting them clears the 269651078Speter * data input register. This also reduces the effects of the 269751078Speter * UMC8669F bug. 269851078Speter */ 269951078Speter divisor = ttspeedtab(speed, comspeedtab); 270051078Speter dlbl = divisor & 0xFF; 270151078Speter if (sp->dlbl != dlbl) 270251078Speter outb(iobase + com_dlbl, dlbl); 270351078Speter dlbh = (u_int) divisor >> 8; 270451078Speter if (sp->dlbh != dlbh) 270551078Speter outb(iobase + com_dlbh, dlbh); 270651078Speter outb(iobase + com_cfcr, CFCR_8BITS); 270751078Speter sp->mcr = inb(iobase + com_mcr); 270851078Speter /* 270951078Speter * We don't want interrupts, but must be careful not to "disable" 271051078Speter * them by clearing the MCR_IENABLE bit, since that might cause 271151078Speter * an interrupt by floating the IRQ line. 271251078Speter */ 271351078Speter outb(iobase + com_mcr, (sp->mcr & MCR_IENABLE) | MCR_DTR | MCR_RTS); 271451078Speter} 271551078Speter 271651078Speterstatic void 271751078Spetersiocnclose(sp, iobase) 271851078Speter struct siocnstate *sp; 271951078Speter Port_t iobase; 272051078Speter{ 272151078Speter /* 272251078Speter * Restore the device control registers. 272351078Speter */ 272451078Speter siocntxwait(iobase); 272551078Speter outb(iobase + com_cfcr, CFCR_DLAB | CFCR_8BITS); 272651078Speter if (sp->dlbl != inb(iobase + com_dlbl)) 272751078Speter outb(iobase + com_dlbl, sp->dlbl); 272851078Speter if (sp->dlbh != inb(iobase + com_dlbh)) 272951078Speter outb(iobase + com_dlbh, sp->dlbh); 273051078Speter outb(iobase + com_cfcr, sp->cfcr); 273151078Speter /* 273251078Speter * XXX damp oscillations of MCR_DTR and MCR_RTS by not restoring them. 273351078Speter */ 273451078Speter outb(iobase + com_mcr, sp->mcr | MCR_DTR | MCR_RTS); 273551078Speter outb(iobase + com_ier, sp->ier); 273651078Speter} 273751078Speter 273851078Speterstatic void 273951078Spetersiocnprobe(cp) 274051078Speter struct consdev *cp; 274151078Speter{ 274251078Speter speed_t boot_speed; 274351078Speter u_char cfcr; 274451078Speter int s, unit; 274551078Speter struct siocnstate sp; 274651078Speter 274751078Speter /* 274851078Speter * Find our first enabled console, if any. If it is a high-level 274951078Speter * console device, then initialize it and return successfully. 275051078Speter * If it is a low-level console device, then initialize it and 275151078Speter * return unsuccessfully. It must be initialized in both cases 275251078Speter * for early use by console drivers and debuggers. Initializing 275351078Speter * the hardware is not necessary in all cases, since the i/o 275451078Speter * routines initialize it on the fly, but it is necessary if 275551078Speter * input might arrive while the hardware is switched back to an 275651078Speter * uninitialized state. We can't handle multiple console devices 275751078Speter * yet because our low-level routines don't take a device arg. 275851078Speter * We trust the user to set the console flags properly so that we 275951078Speter * don't need to probe. 276051078Speter */ 276151078Speter cp->cn_pri = CN_DEAD; 276251078Speter 276351078Speter for (unit = 0; unit < 16; unit++) { /* XXX need to know how many */ 276451078Speter int flags; 276551078Speter int disabled; 276651078Speter if (resource_int_value("sio", unit, "disabled", &disabled) == 0) { 276751078Speter if (disabled) 276851078Speter continue; 276951078Speter } 277051078Speter if (resource_int_value("sio", unit, "flags", &flags)) 277151078Speter continue; 277251078Speter if (COM_CONSOLE(flags) || COM_DEBUGGER(flags)) { 277351078Speter int port; 277451078Speter Port_t iobase; 277551078Speter 277651078Speter if (resource_int_value("sio", unit, "port", &port)) 277751078Speter continue; 277851078Speter iobase = port; 277951078Speter s = spltty(); 278051078Speter if (boothowto & RB_SERIAL) { 278151078Speter boot_speed = siocngetspeed(iobase, comspeedtab); 278251078Speter if (boot_speed) 278351078Speter comdefaultrate = boot_speed; 278451078Speter } 278551078Speter 278651078Speter /* 278751078Speter * Initialize the divisor latch. We can't rely on 278851078Speter * siocnopen() to do this the first time, since it 278951078Speter * avoids writing to the latch if the latch appears 279051078Speter * to have the correct value. Also, if we didn't 279151078Speter * just read the speed from the hardware, then we 279251078Speter * need to set the speed in hardware so that 279351078Speter * switching it later is null. 279451078Speter */ 279551078Speter cfcr = inb(iobase + com_cfcr); 279651078Speter outb(iobase + com_cfcr, CFCR_DLAB | cfcr); 279751078Speter outb(iobase + com_dlbl, 279851078Speter COMBRD(comdefaultrate) & 0xff); 279951078Speter outb(iobase + com_dlbh, 280051078Speter (u_int) COMBRD(comdefaultrate) >> 8); 280151078Speter outb(iobase + com_cfcr, cfcr); 280251078Speter 280351078Speter siocnopen(&sp, iobase, comdefaultrate); 280451078Speter 280551078Speter splx(s); 280651078Speter if (COM_CONSOLE(flags) && !COM_LLCONSOLE(flags)) { 280751078Speter cp->cn_dev = makedev(CDEV_MAJOR, unit); 280851078Speter cp->cn_pri = COM_FORCECONSOLE(flags) 280951078Speter || boothowto & RB_SERIAL 281051078Speter ? CN_REMOTE : CN_NORMAL; 281151078Speter siocniobase = iobase; 281251078Speter siocnunit = unit; 281351078Speter } 281451078Speter if (COM_DEBUGGER(flags)) { 281551078Speter printf("sio%d: gdb debugging port\n", unit); 281651078Speter siogdbiobase = iobase; 281751078Speter siogdbunit = unit; 281851078Speter#if DDB > 0 281951078Speter gdbdev = makedev(CDEV_MAJOR, unit); 282051078Speter gdb_getc = siocngetc; 282151078Speter gdb_putc = siocnputc; 282251078Speter#endif 282351078Speter } 282451078Speter } 282551078Speter } 282651078Speter#ifdef __i386__ 282751078Speter#if DDB > 0 282851078Speter /* 282951078Speter * XXX Ugly Compatability. 283051078Speter * If no gdb port has been specified, set it to be the console 283151078Speter * as some configuration files don't specify the gdb port. 283251078Speter */ 283351078Speter if (gdbdev == NODEV && (boothowto & RB_GDB)) { 283451078Speter printf("Warning: no GDB port specified. Defaulting to sio%d.\n", 283551078Speter siocnunit); 283651078Speter printf("Set flag 0x80 on desired GDB port in your\n"); 283751078Speter printf("configuration file (currently sio only).\n"); 283851078Speter siogdbiobase = siocniobase; 283951078Speter siogdbunit = siocnunit; 284051078Speter gdbdev = makedev(CDEV_MAJOR, siocnunit); 284151078Speter gdb_getc = siocngetc; 284251078Speter gdb_putc = siocnputc; 284351078Speter } 284451078Speter#endif 284551078Speter#endif 284651078Speter} 284751078Speter 284851078Speter#ifdef __alpha__ 284951078Speter 285051078SpeterCONS_DRIVER(sio, NULL, NULL, NULL, siocngetc, siocncheckc, siocnputc); 285151078Speter 285251078Speterint 285351078Spetersiocnattach(port, speed) 285451078Speter int port; 285551078Speter int speed; 285651078Speter{ 285751078Speter int s; 285851078Speter u_char cfcr; 285951078Speter struct siocnstate sp; 286051078Speter 286151078Speter siocniobase = port; 286251078Speter comdefaultrate = speed; 286351078Speter sio_consdev.cn_pri = CN_NORMAL; 286451078Speter sio_consdev.cn_dev = makedev(CDEV_MAJOR, 0); 286551078Speter 286651078Speter s = spltty(); 286751078Speter 286851078Speter /* 286951078Speter * Initialize the divisor latch. We can't rely on 287051078Speter * siocnopen() to do this the first time, since it 287151078Speter * avoids writing to the latch if the latch appears 287251078Speter * to have the correct value. Also, if we didn't 287351078Speter * just read the speed from the hardware, then we 287451078Speter * need to set the speed in hardware so that 287551078Speter * switching it later is null. 287651078Speter */ 287751078Speter cfcr = inb(siocniobase + com_cfcr); 287851078Speter outb(siocniobase + com_cfcr, CFCR_DLAB | cfcr); 287951078Speter outb(siocniobase + com_dlbl, 288051078Speter COMBRD(comdefaultrate) & 0xff); 288151078Speter outb(siocniobase + com_dlbh, 288251078Speter (u_int) COMBRD(comdefaultrate) >> 8); 288351078Speter outb(siocniobase + com_cfcr, cfcr); 288451078Speter 288551078Speter siocnopen(&sp, siocniobase, comdefaultrate); 288651078Speter splx(s); 288751078Speter 288851078Speter cn_tab = &sio_consdev; 288951078Speter return 0; 289051078Speter} 289151078Speter 289251078Speterint 289351078Spetersiogdbattach(port, speed) 289451078Speter int port; 289551078Speter int speed; 289651078Speter{ 289751078Speter int s; 289851078Speter u_char cfcr; 289951078Speter struct siocnstate sp; 290051078Speter 290151078Speter siogdbiobase = port; 290251078Speter gdbdefaultrate = speed; 290351078Speter 290451078Speter s = spltty(); 290551078Speter 290651078Speter /* 290751078Speter * Initialize the divisor latch. We can't rely on 290851078Speter * siocnopen() to do this the first time, since it 290951078Speter * avoids writing to the latch if the latch appears 291051078Speter * to have the correct value. Also, if we didn't 291151078Speter * just read the speed from the hardware, then we 291251078Speter * need to set the speed in hardware so that 291351078Speter * switching it later is null. 291451078Speter */ 291551078Speter cfcr = inb(siogdbiobase + com_cfcr); 291651078Speter outb(siogdbiobase + com_cfcr, CFCR_DLAB | cfcr); 291751078Speter outb(siogdbiobase + com_dlbl, 291851078Speter COMBRD(gdbdefaultrate) & 0xff); 291951078Speter outb(siogdbiobase + com_dlbh, 292051078Speter (u_int) COMBRD(gdbdefaultrate) >> 8); 292151078Speter outb(siogdbiobase + com_cfcr, cfcr); 292251078Speter 292351078Speter siocnopen(&sp, siogdbiobase, gdbdefaultrate); 292451078Speter splx(s); 292551078Speter 292651078Speter return 0; 292751078Speter} 292851078Speter 292951078Speter#endif 293051078Speter 293151078Speterstatic void 293251078Spetersiocninit(cp) 293351078Speter struct consdev *cp; 293451078Speter{ 293551078Speter comconsole = DEV_TO_UNIT(cp->cn_dev); 293651078Speter} 293751078Speter 293851078Speterstatic int 293951078Spetersiocncheckc(dev) 294051078Speter dev_t dev; 294151078Speter{ 294251078Speter int c; 294351078Speter Port_t iobase; 294451078Speter int s; 294551078Speter struct siocnstate sp; 294651078Speter 294751078Speter if (minor(dev) == siogdbunit) 294851078Speter iobase = siogdbiobase; 294951078Speter else 295051078Speter iobase = siocniobase; 295151078Speter s = spltty(); 295251078Speter siocnopen(&sp, iobase, comdefaultrate); 295351078Speter if (inb(iobase + com_lsr) & LSR_RXRDY) 295451078Speter c = inb(iobase + com_data); 295551078Speter else 295651078Speter c = -1; 295751078Speter siocnclose(&sp, iobase); 295851078Speter splx(s); 295951078Speter return (c); 296051078Speter} 296151078Speter 296251078Speter 296351078Speterint 296451078Spetersiocngetc(dev) 296551078Speter dev_t dev; 296651078Speter{ 296751078Speter int c; 296851078Speter Port_t iobase; 296951078Speter int s; 297051078Speter struct siocnstate sp; 297151078Speter 297251078Speter if (minor(dev) == siogdbunit) 297351078Speter iobase = siogdbiobase; 297451078Speter else 297551078Speter iobase = siocniobase; 297651078Speter s = spltty(); 297751078Speter siocnopen(&sp, iobase, comdefaultrate); 297851078Speter while (!(inb(iobase + com_lsr) & LSR_RXRDY)) 297951078Speter ; 298051078Speter c = inb(iobase + com_data); 298151078Speter siocnclose(&sp, iobase); 298251078Speter splx(s); 298351078Speter return (c); 298451078Speter} 298551078Speter 298651078Spetervoid 298751078Spetersiocnputc(dev, c) 298851078Speter dev_t dev; 298951078Speter int c; 299051078Speter{ 299151078Speter int s; 299251078Speter struct siocnstate sp; 299351078Speter Port_t iobase; 299451078Speter 299551078Speter if (minor(dev) == siogdbunit) 299651078Speter iobase = siogdbiobase; 299751078Speter else 299851078Speter iobase = siocniobase; 299951078Speter s = spltty(); 300051078Speter siocnopen(&sp, iobase, comdefaultrate); 300151078Speter siocntxwait(iobase); 300251078Speter outb(iobase + com_data, c); 300351078Speter siocnclose(&sp, iobase); 300451078Speter splx(s); 300551078Speter} 300651078Speter 300751078Speter#ifdef __alpha__ 300851078Speterint 300951078Spetersiogdbgetc() 301051078Speter{ 301151078Speter int c; 301251078Speter Port_t iobase; 301351078Speter int s; 301451078Speter struct siocnstate sp; 301551078Speter 301651078Speter iobase = siogdbiobase; 301751078Speter s = spltty(); 301851078Speter siocnopen(&sp, iobase, gdbdefaultrate); 301951078Speter while (!(inb(iobase + com_lsr) & LSR_RXRDY)) 302051078Speter ; 302151078Speter c = inb(iobase + com_data); 302251078Speter siocnclose(&sp, iobase); 302351078Speter splx(s); 302451078Speter return (c); 302551078Speter} 302651078Speter 302751078Spetervoid 302851078Spetersiogdbputc(c) 302951078Speter int c; 303051078Speter{ 303151078Speter int s; 303251078Speter struct siocnstate sp; 303351078Speter 303451078Speter s = spltty(); 303551078Speter siocnopen(&sp, siogdbiobase, gdbdefaultrate); 303651078Speter siocntxwait(siogdbiobase); 303751078Speter outb(siogdbiobase + com_data, c); 303851078Speter siocnclose(&sp, siogdbiobase); 303951078Speter splx(s); 304051078Speter} 304151078Speter#endif 304251078Speter 304351078SpeterDEV_DRIVER_MODULE(sio, isa, sio_driver, sio_devclass, sio_cdevsw, 0, 0); 3044