sio.c revision 51078
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 51078 1999-09-08 10:59:03Z peter $ 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)); 31051078Speterstatic timeout_t comwakeup; 31151078Speterstatic void disc_optim __P((struct tty *tp, struct termios *t, 31251078Speter struct com_s *com)); 31351078Speter 31451078Speter 31551078Speterstatic char driver_name[] = "sio"; 31651078Speter 31751078Speter/* table and macro for fast conversion from a unit number to its com struct */ 31851078Speterstatic devclass_t sio_devclass; 31951078Speter#define com_addr(unit) ((struct com_s *) \ 32051078Speter devclass_get_softc(sio_devclass, unit)) 32151078Speter 32251078Speterstatic device_method_t sio_methods[] = { 32351078Speter /* Device interface */ 32451078Speter DEVMETHOD(device_probe, sioprobe), 32551078Speter DEVMETHOD(device_attach, sioattach), 32651078Speter 32751078Speter { 0, 0 } 32851078Speter}; 32951078Speter 33051078Speterstatic driver_t sio_driver = { 33151078Speter driver_name, 33251078Speter sio_methods, 33351078Speter sizeof(struct com_s), 33451078Speter}; 33551078Speter 33651078Speterstatic d_open_t sioopen; 33751078Speterstatic d_close_t sioclose; 33851078Speterstatic d_read_t sioread; 33951078Speterstatic d_write_t siowrite; 34051078Speterstatic d_ioctl_t sioioctl; 34151078Speterstatic d_stop_t siostop; 34251078Speterstatic d_devtotty_t siodevtotty; 34351078Speter 34451078Speter#define CDEV_MAJOR 28 34551078Speterstatic struct cdevsw sio_cdevsw = { 34651078Speter /* open */ sioopen, 34751078Speter /* close */ sioclose, 34851078Speter /* read */ sioread, 34951078Speter /* write */ siowrite, 35051078Speter /* ioctl */ sioioctl, 35151078Speter /* stop */ siostop, 35251078Speter /* reset */ noreset, 35351078Speter /* devtotty */ siodevtotty, 35451078Speter /* poll */ ttpoll, 35551078Speter /* mmap */ nommap, 35651078Speter /* strategy */ nostrategy, 35751078Speter /* name */ driver_name, 35851078Speter /* parms */ noparms, 35951078Speter /* maj */ CDEV_MAJOR, 36051078Speter /* dump */ nodump, 36151078Speter /* psize */ nopsize, 36251078Speter /* flags */ D_TTY, 36351078Speter /* maxio */ 0, 36451078Speter /* bmaj */ -1 36551078Speter}; 36651078Speter 36751078Speterint comconsole = -1; 36851078Speterstatic volatile speed_t comdefaultrate = CONSPEED; 36951078Speter#ifdef __alpha__ 37051078Speterstatic volatile speed_t gdbdefaultrate = CONSPEED; 37151078Speter#endif 37251078Speterstatic u_int com_events; /* input chars + weighted output completions */ 37351078Speterstatic Port_t siocniobase; 37451078Speterstatic int siocnunit; 37551078Speterstatic Port_t siogdbiobase; 37651078Speterstatic int siogdbunit = -1; 37751078Speterstatic bool_t sio_registered; 37851078Speterstatic int sio_timeout; 37951078Speterstatic int sio_timeouts_until_log; 38051078Speterstatic struct callout_handle sio_timeout_handle 38151078Speter = CALLOUT_HANDLE_INITIALIZER(&sio_timeout_handle); 38251078Speter 38351078Speterstatic struct speedtab comspeedtab[] = { 38451078Speter { 0, 0 }, 38551078Speter { 50, COMBRD(50) }, 38651078Speter { 75, COMBRD(75) }, 38751078Speter { 110, COMBRD(110) }, 38851078Speter { 134, COMBRD(134) }, 38951078Speter { 150, COMBRD(150) }, 39051078Speter { 200, COMBRD(200) }, 39151078Speter { 300, COMBRD(300) }, 39251078Speter { 600, COMBRD(600) }, 39351078Speter { 1200, COMBRD(1200) }, 39451078Speter { 1800, COMBRD(1800) }, 39551078Speter { 2400, COMBRD(2400) }, 39651078Speter { 4800, COMBRD(4800) }, 39751078Speter { 9600, COMBRD(9600) }, 39851078Speter { 19200, COMBRD(19200) }, 39951078Speter { 38400, COMBRD(38400) }, 40051078Speter { 57600, COMBRD(57600) }, 40151078Speter { 115200, COMBRD(115200) }, 40251078Speter { -1, -1 } 40351078Speter}; 40451078Speter 40551078Speter#ifdef COM_ESP 40651078Speter/* XXX configure this properly. */ 40751078Speterstatic Port_t likely_com_ports[] = { 0x3f8, 0x2f8, 0x3e8, 0x2e8, }; 40851078Speterstatic Port_t likely_esp_ports[] = { 0x140, 0x180, 0x280, 0 }; 40951078Speter#endif 41051078Speter 41151078Speter/* 41251078Speter * handle sysctl read/write requests for console speed 41351078Speter * 41451078Speter * In addition to setting comdefaultrate for I/O through /dev/console, 41551078Speter * also set the initial and lock values for the /dev/ttyXX device 41651078Speter * if there is one associated with the console. Finally, if the /dev/tty 41751078Speter * device has already been open, change the speed on the open running port 41851078Speter * itself. 41951078Speter */ 42051078Speter 42151078Speterstatic int 42251078Spetersysctl_machdep_comdefaultrate SYSCTL_HANDLER_ARGS 42351078Speter{ 42451078Speter int error, s; 42551078Speter speed_t newspeed; 42651078Speter struct com_s *com; 42751078Speter struct tty *tp; 42851078Speter 42951078Speter newspeed = comdefaultrate; 43051078Speter 43151078Speter error = sysctl_handle_opaque(oidp, &newspeed, sizeof newspeed, req); 43251078Speter if (error || !req->newptr) 43351078Speter return (error); 43451078Speter 43551078Speter comdefaultrate = newspeed; 43651078Speter 43751078Speter if (comconsole < 0) /* serial console not selected? */ 43851078Speter return (0); 43951078Speter 44051078Speter com = com_addr(comconsole); 44151078Speter if (!com) 44251078Speter return (ENXIO); 44351078Speter 44451078Speter /* 44551078Speter * set the initial and lock rates for /dev/ttydXX and /dev/cuaXX 44651078Speter * (note, the lock rates really are boolean -- if non-zero, disallow 44751078Speter * speed changes) 44851078Speter */ 44951078Speter com->it_in.c_ispeed = com->it_in.c_ospeed = 45051078Speter com->lt_in.c_ispeed = com->lt_in.c_ospeed = 45151078Speter com->it_out.c_ispeed = com->it_out.c_ospeed = 45251078Speter com->lt_out.c_ispeed = com->lt_out.c_ospeed = comdefaultrate; 45351078Speter 45451078Speter /* 45551078Speter * if we're open, change the running rate too 45651078Speter */ 45751078Speter tp = com->tp; 45851078Speter if (tp && (tp->t_state & TS_ISOPEN)) { 45951078Speter tp->t_termios.c_ispeed = 46051078Speter tp->t_termios.c_ospeed = comdefaultrate; 46151078Speter s = spltty(); 46251078Speter error = comparam(tp, &tp->t_termios); 46351078Speter splx(s); 46451078Speter } 46551078Speter return error; 46651078Speter} 46751078Speter 46851078SpeterSYSCTL_PROC(_machdep, OID_AUTO, conspeed, CTLTYPE_INT | CTLFLAG_RW, 46951078Speter 0, 0, sysctl_machdep_comdefaultrate, "I", ""); 47051078Speter 47151078Speter#if NCARD > 0 47251078Speter/* 47351078Speter * PC-Card (PCMCIA) specific code. 47451078Speter */ 47551078Speterstatic int sioinit __P((struct pccard_devinfo *)); 47651078Speterstatic void siounload __P((struct pccard_devinfo *)); 47751078Speterstatic int card_intr __P((struct pccard_devinfo *)); 47851078Speter 47951078SpeterPCCARD_MODULE(sio, sioinit, siounload, card_intr, 0, tty_imask); 48051078Speter 48151078Speter/* 48251078Speter * Initialize the device - called from Slot manager. 48351078Speter */ 48451078Speterint 48551078Spetersioinit(struct pccard_devinfo *devi) 48651078Speter{ 48751078Speter 48851078Speter /* validate unit number. */ 48951078Speter if (devi->isahd.id_unit >= (NSIOTOT)) 49051078Speter return(ENODEV); 49151078Speter /* Make sure it isn't already probed. */ 49251078Speter if (com_addr(devi->isahd.id_unit)) 49351078Speter return(EBUSY); 49451078Speter 49551078Speter /* It's already probed as serial by Upper */ 49651078Speter devi->isahd.id_flags |= COM_C_NOPROBE; 49751078Speter 49851078Speter /* 49951078Speter * attach the device. 50051078Speter */ 50151078Speter if (sioattach(devi->isahd.id_device) == 0) 50251078Speter return(ENXIO); 50351078Speter 50451078Speter return(0); 50551078Speter} 50651078Speter 50751078Speter/* 50851078Speter * siounload - unload the driver and clear the table. 50951078Speter * XXX TODO: 51051078Speter * This is usually called when the card is ejected, but 51151078Speter * can be caused by a modunload of a controller driver. 51251078Speter * The idea is to reset the driver's view of the device 51351078Speter * and ensure that any driver entry points such as 51451078Speter * read and write do not hang. 51551078Speter */ 51651078Speterstatic void 51751078Spetersiounload(struct pccard_devinfo *devi) 51851078Speter{ 51951078Speter struct com_s *com; 52051078Speter 52151078Speter if (!devi) { 52251078Speter printf("NULL devi in siounload\n"); 52351078Speter return; 52451078Speter } 52551078Speter com = com_addr(devi->isahd.id_unit); 52651078Speter if (!com) { 52751078Speter printf("NULL com in siounload\n"); 52851078Speter return; 52951078Speter } 53051078Speter if (!com->iobase) { 53151078Speter printf("sio%d already unloaded!\n",devi->isahd.id_unit); 53251078Speter return; 53351078Speter } 53451078Speter if (com->tp && (com->tp->t_state & TS_ISOPEN)) { 53551078Speter com->gone = 1; 53651078Speter printf("sio%d: unload\n", devi->isahd.id_unit); 53751078Speter com->tp->t_gen++; 53851078Speter ttyclose(com->tp); 53951078Speter ttwakeup(com->tp); 54051078Speter ttwwakeup(com->tp); 54151078Speter } else { 54251078Speter if (com->ibuf != NULL) 54351078Speter free(com->ibuf, M_DEVBUF); 54451078Speter free(com, M_DEVBUF); 54551078Speter printf("sio%d: unload,gone\n", devi->isahd.id_unit); 54651078Speter } 54751078Speter} 54851078Speter 54951078Speter/* 55051078Speter * card_intr - Shared interrupt called from 55151078Speter * front end of PC-Card handler. 55251078Speter */ 55351078Speterstatic int 55451078Spetercard_intr(struct pccard_devinfo *devi) 55551078Speter{ 55651078Speter struct com_s *com; 55751078Speter 55851078Speter COM_LOCK(); 55951078Speter com = com_addr(devi->isahd.id_unit); 56051078Speter if (com && !com->gone) 56151078Speter siointr1(com_addr(devi->isahd.id_unit)); 56251078Speter COM_UNLOCK(); 56351078Speter return(1); 56451078Speter} 56551078Speter#endif /* NCARD > 0 */ 56651078Speter 56751078Speter#define SET_FLAG(dev, bit) isa_set_flags(dev, isa_get_flags(dev) | (bit)) 56851078Speter#define CLR_FLAG(dev, bit) isa_set_flags(dev, isa_get_flags(dev) & ~(bit)) 56951078Speter 57051078Speterstatic struct isa_pnp_id sio_ids[] = { 57151078Speter {0x0005d041, "Standard PC COM port"}, /* PNP0500 */ 57251078Speter {0x0105d041, "16550A-compatible COM port"}, /* PNP0501 */ 57351078Speter {0x0205d041, "Multiport serial device (non-intelligent 16550)"}, /* PNP0502 */ 57451078Speter {0x1005d041, "Generic IRDA-compatible device"}, /* PNP0510 */ 57551078Speter {0x1105d041, "Generic IRDA-compatible device"}, /* PNP0511 */ 57651078Speter {0x31307256, "USR3031"}, /* USR3031 */ 57751078Speter {0} 57851078Speter}; 57951078Speter 58051078Speterstatic int 58151078Spetersioprobe(dev) 58251078Speter device_t dev; 58351078Speter{ 58451078Speter static bool_t already_init; 58551078Speter bool_t failures[10]; 58651078Speter int fn; 58751078Speter device_t idev; 58851078Speter Port_t iobase; 58951078Speter intrmask_t irqmap[4]; 59051078Speter intrmask_t irqs; 59151078Speter u_char mcr_image; 59251078Speter int result; 59351078Speter device_t xdev; 59451078Speter u_int flags = isa_get_flags(dev); 59551078Speter int rid; 59651078Speter struct resource *port; 59751078Speter 59851078Speter /* Check isapnp ids */ 59951078Speter if (ISA_PNP_PROBE(device_get_parent(dev), dev, sio_ids) == ENXIO) 60051078Speter return (ENXIO); 60151078Speter 60251078Speter rid = 0; 60351078Speter port = bus_alloc_resource(dev, SYS_RES_IOPORT, &rid, 60451078Speter 0, ~0, IO_COMSIZE, RF_ACTIVE); 60551078Speter if (!port) 60651078Speter return ENXIO; 60751078Speter 60851078Speter if (!already_init) { 60951078Speter /* 61051078Speter * Turn off MCR_IENABLE for all likely serial ports. An unused 61151078Speter * port with its MCR_IENABLE gate open will inhibit interrupts 61251078Speter * from any used port that shares the interrupt vector. 61351078Speter * XXX the gate enable is elsewhere for some multiports. 61451078Speter */ 61551078Speter device_t *devs; 61651078Speter int count, i; 61751078Speter 61851078Speter devclass_get_devices(sio_devclass, &devs, &count); 61951078Speter for (i = 0; i < count; i++) { 62051078Speter xdev = devs[i]; 62151078Speter if (device_is_enabled(xdev)) 62251078Speter outb(isa_get_port(xdev) + com_mcr, 0); 62351078Speter } 62451078Speter free(devs, M_TEMP); 62551078Speter already_init = TRUE; 62651078Speter } 62751078Speter 62851078Speter if (COM_LLCONSOLE(flags)) { 62951078Speter printf("sio%d: reserved for low-level i/o\n", 63051078Speter device_get_unit(dev)); 63151078Speter return (ENXIO); 63251078Speter } 63351078Speter 63451078Speter /* 63551078Speter * If the device is on a multiport card and has an AST/4 63651078Speter * compatible interrupt control register, initialize this 63751078Speter * register and prepare to leave MCR_IENABLE clear in the mcr. 63851078Speter * Otherwise, prepare to set MCR_IENABLE in the mcr. 63951078Speter * Point idev to the device struct giving the correct id_irq. 64051078Speter * This is the struct for the master device if there is one. 64151078Speter */ 64251078Speter idev = dev; 64351078Speter mcr_image = MCR_IENABLE; 64451078Speter#ifdef COM_MULTIPORT 64551078Speter if (COM_ISMULTIPORT(flags)) { 64651078Speter idev = devclass_get_device(sio_devclass, COM_MPMASTER(flags)); 64751078Speter if (idev == NULL) { 64851078Speter printf("sio%d: master device %d not configured\n", 64951078Speter device_get_unit(dev), COM_MPMASTER(flags)); 65051078Speter idev = dev; 65151078Speter } 65251078Speter if (!COM_NOTAST4(flags)) { 65351078Speter outb(isa_get_port(idev) + com_scr, 65451078Speter isa_get_irq(idev) >= 0 ? 0x80 : 0); 65551078Speter mcr_image = 0; 65651078Speter } 65751078Speter } 65851078Speter#endif /* COM_MULTIPORT */ 65951078Speter if (isa_get_irq(idev) < 0) 66051078Speter mcr_image = 0; 66151078Speter 66251078Speter bzero(failures, sizeof failures); 66351078Speter iobase = rman_get_start(port); 66451078Speter 66551078Speter /* 66651078Speter * We don't want to get actual interrupts, just masked ones. 66751078Speter * Interrupts from this line should already be masked in the ICU, 66851078Speter * but mask them in the processor as well in case there are some 66951078Speter * (misconfigured) shared interrupts. 67051078Speter */ 67151078Speter disable_intr(); 67251078Speter/* EXTRA DELAY? */ 67351078Speter 67451078Speter /* 67551078Speter * Initialize the speed and the word size and wait long enough to 67651078Speter * drain the maximum of 16 bytes of junk in device output queues. 67751078Speter * The speed is undefined after a master reset and must be set 67851078Speter * before relying on anything related to output. There may be 67951078Speter * junk after a (very fast) soft reboot and (apparently) after 68051078Speter * master reset. 68151078Speter * XXX what about the UART bug avoided by waiting in comparam()? 68251078Speter * We don't want to to wait long enough to drain at 2 bps. 68351078Speter */ 68451078Speter if (iobase == siocniobase) 68551078Speter DELAY((16 + 1) * 1000000 / (comdefaultrate / 10)); 68651078Speter else { 68751078Speter outb(iobase + com_cfcr, CFCR_DLAB | CFCR_8BITS); 68851078Speter outb(iobase + com_dlbl, COMBRD(SIO_TEST_SPEED) & 0xff); 68951078Speter outb(iobase + com_dlbh, (u_int) COMBRD(SIO_TEST_SPEED) >> 8); 69051078Speter outb(iobase + com_cfcr, CFCR_8BITS); 69151078Speter DELAY((16 + 1) * 1000000 / (SIO_TEST_SPEED / 10)); 69251078Speter } 69351078Speter 69451078Speter /* 69551078Speter * Enable the interrupt gate and disable device interupts. This 69651078Speter * should leave the device driving the interrupt line low and 69751078Speter * guarantee an edge trigger if an interrupt can be generated. 69851078Speter */ 69951078Speter/* EXTRA DELAY? */ 70051078Speter outb(iobase + com_mcr, mcr_image); 70151078Speter outb(iobase + com_ier, 0); 70251078Speter DELAY(1000); /* XXX */ 70351078Speter irqmap[0] = isa_irq_pending(); 70451078Speter 70551078Speter /* 70651078Speter * Attempt to set loopback mode so that we can send a null byte 70751078Speter * without annoying any external device. 70851078Speter */ 70951078Speter/* EXTRA DELAY? */ 71051078Speter outb(iobase + com_mcr, mcr_image | MCR_LOOPBACK); 71151078Speter 71251078Speter /* 71351078Speter * Attempt to generate an output interrupt. On 8250's, setting 71451078Speter * IER_ETXRDY generates an interrupt independent of the current 71551078Speter * setting and independent of whether the THR is empty. On 16450's, 71651078Speter * setting IER_ETXRDY generates an interrupt independent of the 71751078Speter * current setting. On 16550A's, setting IER_ETXRDY only 71851078Speter * generates an interrupt when IER_ETXRDY is not already set. 71951078Speter */ 72051078Speter outb(iobase + com_ier, IER_ETXRDY); 72151078Speter 72251078Speter /* 72351078Speter * On some 16x50 incompatibles, setting IER_ETXRDY doesn't generate 72451078Speter * an interrupt. They'd better generate one for actually doing 72551078Speter * output. Loopback may be broken on the same incompatibles but 72651078Speter * it's unlikely to do more than allow the null byte out. 72751078Speter */ 72851078Speter outb(iobase + com_data, 0); 72951078Speter DELAY((1 + 2) * 1000000 / (SIO_TEST_SPEED / 10)); 73051078Speter 73151078Speter /* 73251078Speter * Turn off loopback mode so that the interrupt gate works again 73351078Speter * (MCR_IENABLE was hidden). This should leave the device driving 73451078Speter * an interrupt line high. It doesn't matter if the interrupt 73551078Speter * line oscillates while we are not looking at it, since interrupts 73651078Speter * are disabled. 73751078Speter */ 73851078Speter/* EXTRA DELAY? */ 73951078Speter outb(iobase + com_mcr, mcr_image); 74051078Speter 74151078Speter /* 74251078Speter * It's a definitly Serial PCMCIA(16550A), but still be required 74351078Speter * for IIR_TXRDY implementation ( Palido 321s, DC-1S... ) 74451078Speter */ 74551078Speter if ( COM_NOPROBE(flags) ) { 74651078Speter /* Reading IIR register twice */ 74751078Speter for ( fn = 0; fn < 2; fn ++ ) { 74851078Speter DELAY(10000); 74951078Speter failures[6] = inb(iobase + com_iir); 75051078Speter } 75151078Speter /* Check IIR_TXRDY clear ? */ 75251078Speter result = 0; 75351078Speter if ( failures[6] & IIR_TXRDY ) { 75451078Speter /* Nop, Double check with clearing IER */ 75551078Speter outb(iobase + com_ier, 0); 75651078Speter if ( inb(iobase + com_iir) & IIR_NOPEND ) { 75751078Speter /* Ok. we're familia this gang */ 75851078Speter SET_FLAG(dev, COM_C_IIR_TXRDYBUG); /* Set IIR_TXRDYBUG */ 75951078Speter } else { 76051078Speter /* Unknown, Just omit this chip.. XXX */ 76151078Speter result = ENXIO; 76251078Speter } 76351078Speter } else { 76451078Speter /* OK. this is well-known guys */ 76551078Speter CLR_FLAG(dev, COM_C_IIR_TXRDYBUG); /*Clear IIR_TXRDYBUG*/ 76651078Speter } 76751078Speter outb(iobase + com_cfcr, CFCR_8BITS); 76851078Speter enable_intr(); 76951078Speter bus_release_resource(dev, SYS_RES_IOPORT, rid, port); 77051078Speter return (iobase == siocniobase ? 0 : result); 77151078Speter } 77251078Speter 77351078Speter /* 77451078Speter * Check that 77551078Speter * o the CFCR, IER and MCR in UART hold the values written to them 77651078Speter * (the values happen to be all distinct - this is good for 77751078Speter * avoiding false positive tests from bus echoes). 77851078Speter * o an output interrupt is generated and its vector is correct. 77951078Speter * o the interrupt goes away when the IIR in the UART is read. 78051078Speter */ 78151078Speter/* EXTRA DELAY? */ 78251078Speter failures[0] = inb(iobase + com_cfcr) - CFCR_8BITS; 78351078Speter failures[1] = inb(iobase + com_ier) - IER_ETXRDY; 78451078Speter failures[2] = inb(iobase + com_mcr) - mcr_image; 78551078Speter DELAY(10000); /* Some internal modems need this time */ 78651078Speter irqmap[1] = isa_irq_pending(); 78751078Speter failures[4] = (inb(iobase + com_iir) & IIR_IMASK) - IIR_TXRDY; 78851078Speter DELAY(1000); /* XXX */ 78951078Speter irqmap[2] = isa_irq_pending(); 79051078Speter failures[6] = (inb(iobase + com_iir) & IIR_IMASK) - IIR_NOPEND; 79151078Speter 79251078Speter /* 79351078Speter * Turn off all device interrupts and check that they go off properly. 79451078Speter * Leave MCR_IENABLE alone. For ports without a master port, it gates 79551078Speter * the OUT2 output of the UART to 79651078Speter * the ICU input. Closing the gate would give a floating ICU input 79751078Speter * (unless there is another device driving it) and spurious interrupts. 79851078Speter * (On the system that this was first tested on, the input floats high 79951078Speter * and gives a (masked) interrupt as soon as the gate is closed.) 80051078Speter */ 80151078Speter outb(iobase + com_ier, 0); 80251078Speter outb(iobase + com_cfcr, CFCR_8BITS); /* dummy to avoid bus echo */ 80351078Speter failures[7] = inb(iobase + com_ier); 80451078Speter DELAY(1000); /* XXX */ 80551078Speter irqmap[3] = isa_irq_pending(); 80651078Speter failures[9] = (inb(iobase + com_iir) & IIR_IMASK) - IIR_NOPEND; 80751078Speter 80851078Speter enable_intr(); 80951078Speter 81051078Speter irqs = irqmap[1] & ~irqmap[0]; 81151078Speter if (isa_get_irq(idev) >= 0 && ((1 << isa_get_irq(idev)) & irqs) == 0) 81251078Speter printf( 81351078Speter "sio%d: configured irq %d not in bitmap of probed irqs %#x\n", 81451078Speter device_get_unit(dev), isa_get_irq(idev), irqs); 81551078Speter if (bootverbose) 81651078Speter printf("sio%d: irq maps: %#x %#x %#x %#x\n", 81751078Speter device_get_unit(dev), 81851078Speter irqmap[0], irqmap[1], irqmap[2], irqmap[3]); 81951078Speter 82051078Speter result = 0; 82151078Speter for (fn = 0; fn < sizeof failures; ++fn) 82251078Speter if (failures[fn]) { 82351078Speter outb(iobase + com_mcr, 0); 82451078Speter result = ENXIO; 82551078Speter if (bootverbose) { 82651078Speter printf("sio%d: probe failed test(s):", 82751078Speter device_get_unit(dev)); 82851078Speter for (fn = 0; fn < sizeof failures; ++fn) 82951078Speter if (failures[fn]) 83051078Speter printf(" %d", fn); 83151078Speter printf("\n"); 83251078Speter } 83351078Speter break; 83451078Speter } 83551078Speter bus_release_resource(dev, SYS_RES_IOPORT, rid, port); 83651078Speter return (iobase == siocniobase ? 0 : result); 83751078Speter} 83851078Speter 83951078Speter#ifdef COM_ESP 84051078Speterstatic int 84151078Speterespattach(com, esp_port) 84251078Speter struct com_s *com; 84351078Speter Port_t esp_port; 84451078Speter{ 84551078Speter u_char dips; 84651078Speter u_char val; 84751078Speter 84851078Speter /* 84951078Speter * Check the ESP-specific I/O port to see if we're an ESP 85051078Speter * card. If not, return failure immediately. 85151078Speter */ 85251078Speter if ((inb(esp_port) & 0xf3) == 0) { 85351078Speter printf(" port 0x%x is not an ESP board?\n", esp_port); 85451078Speter return (0); 85551078Speter } 85651078Speter 85751078Speter /* 85851078Speter * We've got something that claims to be a Hayes ESP card. 85951078Speter * Let's hope so. 86051078Speter */ 86151078Speter 86251078Speter /* Get the dip-switch configuration */ 86351078Speter outb(esp_port + ESP_CMD1, ESP_GETDIPS); 86451078Speter dips = inb(esp_port + ESP_STATUS1); 86551078Speter 86651078Speter /* 86751078Speter * Bits 0,1 of dips say which COM port we are. 86851078Speter */ 86951078Speter if (com->iobase == likely_com_ports[dips & 0x03]) 87051078Speter printf(" : ESP"); 87151078Speter else { 87251078Speter printf(" esp_port has com %d\n", dips & 0x03); 87351078Speter return (0); 87451078Speter } 87551078Speter 87651078Speter /* 87751078Speter * Check for ESP version 2.0 or later: bits 4,5,6 = 010. 87851078Speter */ 87951078Speter outb(esp_port + ESP_CMD1, ESP_GETTEST); 88051078Speter val = inb(esp_port + ESP_STATUS1); /* clear reg 1 */ 88151078Speter val = inb(esp_port + ESP_STATUS2); 88251078Speter if ((val & 0x70) < 0x20) { 88351078Speter printf("-old (%o)", val & 0x70); 88451078Speter return (0); 88551078Speter } 88651078Speter 88751078Speter /* 88851078Speter * Check for ability to emulate 16550: bit 7 == 1 88951078Speter */ 89051078Speter if ((dips & 0x80) == 0) { 89151078Speter printf(" slave"); 89251078Speter return (0); 89351078Speter } 89451078Speter 89551078Speter /* 89651078Speter * Okay, we seem to be a Hayes ESP card. Whee. 89751078Speter */ 89851078Speter com->esp = TRUE; 89951078Speter com->esp_port = esp_port; 90051078Speter return (1); 90151078Speter} 90251078Speter#endif /* COM_ESP */ 90351078Speter 90451078Speterstatic int 90551078Spetersioattach(dev) 90651078Speter device_t dev; 90751078Speter{ 90851078Speter struct com_s *com; 90951078Speter#ifdef COM_ESP 91051078Speter Port_t *espp; 91151078Speter#endif 91251078Speter Port_t iobase; 91351078Speter int unit; 91451078Speter void *ih; 91551078Speter u_int flags = isa_get_flags(dev); 91651078Speter int rid; 91751078Speter struct resource *port; 91851078Speter 91951078Speter rid = 0; 92051078Speter port = bus_alloc_resource(dev, SYS_RES_IOPORT, &rid, 92151078Speter 0, ~0, IO_COMSIZE, RF_ACTIVE); 92251078Speter if (!port) 92351078Speter return ENXIO; 92451078Speter 92551078Speter iobase = rman_get_start(port); 92651078Speter unit = device_get_unit(dev); 92751078Speter com = device_get_softc(dev); 92851078Speter 92951078Speter /* 93051078Speter * sioprobe() has initialized the device registers as follows: 93151078Speter * o cfcr = CFCR_8BITS. 93251078Speter * It is most important that CFCR_DLAB is off, so that the 93351078Speter * data port is not hidden when we enable interrupts. 93451078Speter * o ier = 0. 93551078Speter * Interrupts are only enabled when the line is open. 93651078Speter * o mcr = MCR_IENABLE, or 0 if the port has AST/4 compatible 93751078Speter * interrupt control register or the config specifies no irq. 93851078Speter * Keeping MCR_DTR and MCR_RTS off might stop the external 93951078Speter * device from sending before we are ready. 94051078Speter */ 94151078Speter bzero(com, sizeof *com); 94251078Speter com->unit = unit; 94351078Speter com->ioportres = port; 94451078Speter com->cfcr_image = CFCR_8BITS; 94551078Speter com->dtr_wait = 3 * hz; 94651078Speter com->loses_outints = COM_LOSESOUTINTS(flags) != 0; 94751078Speter com->no_irq = isa_get_irq(dev) < 0; 94851078Speter com->tx_fifo_size = 1; 94951078Speter com->obufs[0].l_head = com->obuf1; 95051078Speter com->obufs[1].l_head = com->obuf2; 95151078Speter 95251078Speter com->iobase = iobase; 95351078Speter com->data_port = iobase + com_data; 95451078Speter com->int_id_port = iobase + com_iir; 95551078Speter com->modem_ctl_port = iobase + com_mcr; 95651078Speter com->mcr_image = inb(com->modem_ctl_port); 95751078Speter com->line_status_port = iobase + com_lsr; 95851078Speter com->modem_status_port = iobase + com_msr; 95951078Speter com->intr_ctl_port = iobase + com_ier; 96051078Speter 96151078Speter /* 96251078Speter * We don't use all the flags from <sys/ttydefaults.h> since they 96351078Speter * are only relevant for logins. It's important to have echo off 96451078Speter * initially so that the line doesn't start blathering before the 96551078Speter * echo flag can be turned off. 96651078Speter */ 96751078Speter com->it_in.c_iflag = 0; 96851078Speter com->it_in.c_oflag = 0; 96951078Speter com->it_in.c_cflag = TTYDEF_CFLAG; 97051078Speter com->it_in.c_lflag = 0; 97151078Speter if (unit == comconsole) { 97251078Speter com->it_in.c_iflag = TTYDEF_IFLAG; 97351078Speter com->it_in.c_oflag = TTYDEF_OFLAG; 97451078Speter com->it_in.c_cflag = TTYDEF_CFLAG | CLOCAL; 97551078Speter com->it_in.c_lflag = TTYDEF_LFLAG; 97651078Speter com->lt_out.c_cflag = com->lt_in.c_cflag = CLOCAL; 97751078Speter com->lt_out.c_ispeed = com->lt_out.c_ospeed = 97851078Speter com->lt_in.c_ispeed = com->lt_in.c_ospeed = 97951078Speter com->it_in.c_ispeed = com->it_in.c_ospeed = comdefaultrate; 98051078Speter } else 98151078Speter com->it_in.c_ispeed = com->it_in.c_ospeed = TTYDEF_SPEED; 98251078Speter if (siosetwater(com, com->it_in.c_ispeed) != 0) { 98351078Speter enable_intr(); 98451078Speter free(com, M_DEVBUF); 98551078Speter return (0); 98651078Speter } 98751078Speter enable_intr(); 98851078Speter termioschars(&com->it_in); 98951078Speter com->it_out = com->it_in; 99051078Speter 99151078Speter /* attempt to determine UART type */ 99251078Speter printf("sio%d: type", unit); 99351078Speter 99451078Speter 99551078Speter#ifdef COM_MULTIPORT 99651078Speter if (!COM_ISMULTIPORT(flags) && !COM_IIR_TXRDYBUG(flags)) 99751078Speter#else 99851078Speter if (!COM_IIR_TXRDYBUG(flags)) 99951078Speter#endif 100051078Speter { 100151078Speter u_char scr; 100251078Speter u_char scr1; 100351078Speter u_char scr2; 100451078Speter 100551078Speter scr = inb(iobase + com_scr); 100651078Speter outb(iobase + com_scr, 0xa5); 100751078Speter scr1 = inb(iobase + com_scr); 100851078Speter outb(iobase + com_scr, 0x5a); 100951078Speter scr2 = inb(iobase + com_scr); 101051078Speter outb(iobase + com_scr, scr); 101151078Speter if (scr1 != 0xa5 || scr2 != 0x5a) { 101251078Speter printf(" 8250"); 101351078Speter goto determined_type; 101451078Speter } 101551078Speter } 101651078Speter outb(iobase + com_fifo, FIFO_ENABLE | FIFO_RX_HIGH); 101751078Speter DELAY(100); 101851078Speter com->st16650a = 0; 101951078Speter switch (inb(com->int_id_port) & IIR_FIFO_MASK) { 102051078Speter case FIFO_RX_LOW: 102151078Speter printf(" 16450"); 102251078Speter break; 102351078Speter case FIFO_RX_MEDL: 102451078Speter printf(" 16450?"); 102551078Speter break; 102651078Speter case FIFO_RX_MEDH: 102751078Speter printf(" 16550?"); 102851078Speter break; 102951078Speter case FIFO_RX_HIGH: 103051078Speter if (COM_NOFIFO(flags)) { 103151078Speter printf(" 16550A fifo disabled"); 103251078Speter } else { 103351078Speter com->hasfifo = TRUE; 103451078Speter if (COM_ST16650A(flags)) { 103551078Speter com->st16650a = 1; 103651078Speter com->tx_fifo_size = 32; 103751078Speter printf(" ST16650A"); 103851078Speter } else { 103951078Speter com->tx_fifo_size = COM_FIFOSIZE(flags); 104051078Speter printf(" 16550A"); 104151078Speter } 104251078Speter } 104351078Speter#ifdef COM_ESP 104451078Speter for (espp = likely_esp_ports; *espp != 0; espp++) 104551078Speter if (espattach(com, *espp)) { 104651078Speter com->tx_fifo_size = 1024; 104751078Speter break; 104851078Speter } 104951078Speter#endif 105051078Speter if (!com->st16650a) { 105151078Speter if (!com->tx_fifo_size) 105251078Speter com->tx_fifo_size = 16; 105351078Speter else 105451078Speter printf(" lookalike with %d bytes FIFO", 105551078Speter com->tx_fifo_size); 105651078Speter } 105751078Speter 105851078Speter break; 105951078Speter } 106051078Speter 106151078Speter#ifdef COM_ESP 106251078Speter if (com->esp) { 106351078Speter /* 106451078Speter * Set 16550 compatibility mode. 106551078Speter * We don't use the ESP_MODE_SCALE bit to increase the 106651078Speter * fifo trigger levels because we can't handle large 106751078Speter * bursts of input. 106851078Speter * XXX flow control should be set in comparam(), not here. 106951078Speter */ 107051078Speter outb(com->esp_port + ESP_CMD1, ESP_SETMODE); 107151078Speter outb(com->esp_port + ESP_CMD2, ESP_MODE_RTS | ESP_MODE_FIFO); 107251078Speter 107351078Speter /* Set RTS/CTS flow control. */ 107451078Speter outb(com->esp_port + ESP_CMD1, ESP_SETFLOWTYPE); 107551078Speter outb(com->esp_port + ESP_CMD2, ESP_FLOW_RTS); 107651078Speter outb(com->esp_port + ESP_CMD2, ESP_FLOW_CTS); 107751078Speter 107851078Speter /* Set flow-control levels. */ 107951078Speter outb(com->esp_port + ESP_CMD1, ESP_SETRXFLOW); 108051078Speter outb(com->esp_port + ESP_CMD2, HIBYTE(768)); 108151078Speter outb(com->esp_port + ESP_CMD2, LOBYTE(768)); 108251078Speter outb(com->esp_port + ESP_CMD2, HIBYTE(512)); 108351078Speter outb(com->esp_port + ESP_CMD2, LOBYTE(512)); 108451078Speter } 108551078Speter#endif /* COM_ESP */ 108651078Speter outb(iobase + com_fifo, 0); 108751078Speterdetermined_type: ; 108851078Speter 108951078Speter#ifdef COM_MULTIPORT 109051078Speter if (COM_ISMULTIPORT(flags)) { 109151078Speter com->multiport = TRUE; 109251078Speter printf(" (multiport"); 109351078Speter if (unit == COM_MPMASTER(flags)) 109451078Speter printf(" master"); 109551078Speter printf(")"); 109651078Speter com->no_irq = 109751078Speter isa_get_irq(devclass_get_device 109851078Speter (sio_devclass, COM_MPMASTER(flags))) < 0; 109951078Speter } 110051078Speter#endif /* COM_MULTIPORT */ 110151078Speter if (unit == comconsole) 110251078Speter printf(", console"); 110351078Speter if ( COM_IIR_TXRDYBUG(flags) ) 110451078Speter printf(" with a bogus IIR_TXRDY register"); 110551078Speter printf("\n"); 110651078Speter 110751078Speter if (!sio_registered) { 110851078Speter register_swi(SWI_TTY, siopoll); 110951078Speter sio_registered = TRUE; 111051078Speter } 111151078Speter make_dev(&sio_cdevsw, unit, 111251078Speter UID_ROOT, GID_WHEEL, 0600, "ttyd%r", unit); 111351078Speter make_dev(&sio_cdevsw, unit | CONTROL_INIT_STATE, 111451078Speter UID_ROOT, GID_WHEEL, 0600, "ttyid%r", unit); 111551078Speter make_dev(&sio_cdevsw, unit | CONTROL_LOCK_STATE, 111651078Speter UID_ROOT, GID_WHEEL, 0600, "ttyld%r", unit); 111751078Speter make_dev(&sio_cdevsw, unit | CALLOUT_MASK, 111851078Speter UID_UUCP, GID_DIALER, 0660, "cuaa%r", unit); 111951078Speter make_dev(&sio_cdevsw, unit | CALLOUT_MASK | CONTROL_INIT_STATE, 112051078Speter UID_UUCP, GID_DIALER, 0660, "cuaia%r", unit); 112151078Speter make_dev(&sio_cdevsw, unit | CALLOUT_MASK | CONTROL_LOCK_STATE, 112251078Speter UID_UUCP, GID_DIALER, 0660, "cuala%r", unit); 112351078Speter com->flags = flags; 112451078Speter com->pps.ppscap = PPS_CAPTUREASSERT | PPS_CAPTURECLEAR; 112551078Speter pps_init(&com->pps); 112651078Speter 112751078Speter rid = 0; 112851078Speter com->irqres = bus_alloc_resource(dev, SYS_RES_IRQ, &rid, 0ul, ~0ul, 1, 112951078Speter RF_SHAREABLE | RF_ACTIVE); 113051078Speter BUS_SETUP_INTR(device_get_parent(dev), dev, com->irqres, 113151078Speter INTR_TYPE_TTY | INTR_TYPE_FAST, 113251078Speter siointr, com, &ih); 113351078Speter 113451078Speter return (0); 113551078Speter} 113651078Speter 113751078Speterstatic int 113851078Spetersioopen(dev, flag, mode, p) 113951078Speter dev_t dev; 114051078Speter int flag; 114151078Speter int mode; 114251078Speter struct proc *p; 114351078Speter{ 114451078Speter struct com_s *com; 114551078Speter int error; 114651078Speter Port_t iobase; 114751078Speter int mynor; 114851078Speter int s; 114951078Speter struct tty *tp; 115051078Speter int unit; 115151078Speter 115251078Speter mynor = minor(dev); 115351078Speter unit = MINOR_TO_UNIT(mynor); 115451078Speter if ((u_int) unit >= NSIOTOT || (com = com_addr(unit)) == NULL) 115551078Speter return (ENXIO); 115651078Speter if (com->gone) 115751078Speter return (ENXIO); 115851078Speter if (mynor & CONTROL_MASK) 115951078Speter return (0); 116051078Speter tp = dev->si_tty = com->tp = ttymalloc(com->tp); 116151078Speter s = spltty(); 116251078Speter /* 116351078Speter * We jump to this label after all non-interrupted sleeps to pick 116451078Speter * up any changes of the device state. 116551078Speter */ 116651078Speteropen_top: 116751078Speter while (com->state & CS_DTR_OFF) { 116851078Speter error = tsleep(&com->dtr_wait, TTIPRI | PCATCH, "siodtr", 0); 116951078Speter if (com_addr(unit) == NULL) 117051078Speter return (ENXIO); 117151078Speter if (error != 0 || com->gone) 117251078Speter goto out; 117351078Speter } 117451078Speter if (tp->t_state & TS_ISOPEN) { 117551078Speter /* 117651078Speter * The device is open, so everything has been initialized. 117751078Speter * Handle conflicts. 117851078Speter */ 117951078Speter if (mynor & CALLOUT_MASK) { 118051078Speter if (!com->active_out) { 118151078Speter error = EBUSY; 118251078Speter goto out; 118351078Speter } 118451078Speter } else { 118551078Speter if (com->active_out) { 118651078Speter if (flag & O_NONBLOCK) { 118751078Speter error = EBUSY; 118851078Speter goto out; 118951078Speter } 119051078Speter error = tsleep(&com->active_out, 119151078Speter TTIPRI | PCATCH, "siobi", 0); 119251078Speter if (com_addr(unit) == NULL) 119351078Speter return (ENXIO); 119451078Speter if (error != 0 || com->gone) 119551078Speter goto out; 119651078Speter goto open_top; 119751078Speter } 119851078Speter } 119951078Speter if (tp->t_state & TS_XCLUDE && 120051078Speter suser(p)) { 120151078Speter error = EBUSY; 120251078Speter goto out; 120351078Speter } 120451078Speter } else { 120551078Speter /* 120651078Speter * The device isn't open, so there are no conflicts. 120751078Speter * Initialize it. Initialization is done twice in many 120851078Speter * cases: to preempt sleeping callin opens if we are 120951078Speter * callout, and to complete a callin open after DCD rises. 121051078Speter */ 121151078Speter tp->t_oproc = comstart; 121251078Speter tp->t_param = comparam; 121351078Speter tp->t_dev = dev; 121451078Speter tp->t_termios = mynor & CALLOUT_MASK 121551078Speter ? com->it_out : com->it_in; 121651078Speter (void)commctl(com, TIOCM_DTR | TIOCM_RTS, DMSET); 121751078Speter com->poll = com->no_irq; 121851078Speter com->poll_output = com->loses_outints; 121951078Speter ++com->wopeners; 122051078Speter error = comparam(tp, &tp->t_termios); 122151078Speter --com->wopeners; 122251078Speter if (error != 0) 122351078Speter goto out; 122451078Speter /* 122551078Speter * XXX we should goto open_top if comparam() slept. 122651078Speter */ 122751078Speter iobase = com->iobase; 122851078Speter if (com->hasfifo) { 122951078Speter /* 123051078Speter * (Re)enable and drain fifos. 123151078Speter * 123251078Speter * Certain SMC chips cause problems if the fifos 123351078Speter * are enabled while input is ready. Turn off the 123451078Speter * fifo if necessary to clear the input. We test 123551078Speter * the input ready bit after enabling the fifos 123651078Speter * since we've already enabled them in comparam() 123751078Speter * and to handle races between enabling and fresh 123851078Speter * input. 123951078Speter */ 124051078Speter while (TRUE) { 124151078Speter outb(iobase + com_fifo, 124251078Speter FIFO_RCV_RST | FIFO_XMT_RST 124351078Speter | com->fifo_image); 124451078Speter /* 124551078Speter * XXX the delays are for superstitious 124651078Speter * historical reasons. It must be less than 124751078Speter * the character time at the maximum 124851078Speter * supported speed (87 usec at 115200 bps 124951078Speter * 8N1). Otherwise we might loop endlessly 125051078Speter * if data is streaming in. We used to use 125151078Speter * delays of 100. That usually worked 125251078Speter * because DELAY(100) used to usually delay 125351078Speter * for about 85 usec instead of 100. 125451078Speter */ 125551078Speter DELAY(50); 125651078Speter if (!(inb(com->line_status_port) & LSR_RXRDY)) 125751078Speter break; 125851078Speter outb(iobase + com_fifo, 0); 125951078Speter DELAY(50); 126051078Speter (void) inb(com->data_port); 126151078Speter } 126251078Speter } 126351078Speter 126451078Speter disable_intr(); 126551078Speter (void) inb(com->line_status_port); 126651078Speter (void) inb(com->data_port); 126751078Speter com->prev_modem_status = com->last_modem_status 126851078Speter = inb(com->modem_status_port); 126951078Speter if (COM_IIR_TXRDYBUG(com->flags)) { 127051078Speter outb(com->intr_ctl_port, IER_ERXRDY | IER_ERLS 127151078Speter | IER_EMSC); 127251078Speter } else { 127351078Speter outb(com->intr_ctl_port, IER_ERXRDY | IER_ETXRDY 127451078Speter | IER_ERLS | IER_EMSC); 127551078Speter } 127651078Speter enable_intr(); 127751078Speter /* 127851078Speter * Handle initial DCD. Callout devices get a fake initial 127951078Speter * DCD (trapdoor DCD). If we are callout, then any sleeping 128051078Speter * callin opens get woken up and resume sleeping on "siobi" 128151078Speter * instead of "siodcd". 128251078Speter */ 128351078Speter /* 128451078Speter * XXX `mynor & CALLOUT_MASK' should be 128551078Speter * `tp->t_cflag & (SOFT_CARRIER | TRAPDOOR_CARRIER) where 128651078Speter * TRAPDOOR_CARRIER is the default initial state for callout 128751078Speter * devices and SOFT_CARRIER is like CLOCAL except it hides 128851078Speter * the true carrier. 128951078Speter */ 129051078Speter if (com->prev_modem_status & MSR_DCD || mynor & CALLOUT_MASK) 129151078Speter (*linesw[tp->t_line].l_modem)(tp, 1); 129251078Speter } 129351078Speter /* 129451078Speter * Wait for DCD if necessary. 129551078Speter */ 129651078Speter if (!(tp->t_state & TS_CARR_ON) && !(mynor & CALLOUT_MASK) 129751078Speter && !(tp->t_cflag & CLOCAL) && !(flag & O_NONBLOCK)) { 129851078Speter ++com->wopeners; 129951078Speter error = tsleep(TSA_CARR_ON(tp), TTIPRI | PCATCH, "siodcd", 0); 130051078Speter if (com_addr(unit) == NULL) 130151078Speter return (ENXIO); 130251078Speter --com->wopeners; 130351078Speter if (error != 0 || com->gone) 130451078Speter goto out; 130551078Speter goto open_top; 130651078Speter } 130751078Speter error = (*linesw[tp->t_line].l_open)(dev, tp); 130851078Speter disc_optim(tp, &tp->t_termios, com); 130951078Speter if (tp->t_state & TS_ISOPEN && mynor & CALLOUT_MASK) 131051078Speter com->active_out = TRUE; 131151078Speter siosettimeout(); 131251078Speterout: 131351078Speter splx(s); 131451078Speter if (!(tp->t_state & TS_ISOPEN) && com->wopeners == 0) 131551078Speter comhardclose(com); 131651078Speter return (error); 131751078Speter} 131851078Speter 131951078Speterstatic int 132051078Spetersioclose(dev, flag, mode, p) 132151078Speter dev_t dev; 132251078Speter int flag; 132351078Speter int mode; 132451078Speter struct proc *p; 132551078Speter{ 132651078Speter struct com_s *com; 132751078Speter int mynor; 132851078Speter int s; 132951078Speter struct tty *tp; 133051078Speter 133151078Speter mynor = minor(dev); 133251078Speter if (mynor & CONTROL_MASK) 133351078Speter return (0); 133451078Speter com = com_addr(MINOR_TO_UNIT(mynor)); 133551078Speter tp = com->tp; 133651078Speter s = spltty(); 133751078Speter (*linesw[tp->t_line].l_close)(tp, flag); 133851078Speter disc_optim(tp, &tp->t_termios, com); 133951078Speter siostop(tp, FREAD | FWRITE); 134051078Speter comhardclose(com); 134151078Speter ttyclose(tp); 134251078Speter siosettimeout(); 134351078Speter splx(s); 134451078Speter if (com->gone) { 134551078Speter printf("sio%d: gone\n", com->unit); 134651078Speter s = spltty(); 134751078Speter if (com->ibuf != NULL) 134851078Speter free(com->ibuf, M_DEVBUF); 134951078Speter bzero(tp, sizeof *tp); 135051078Speter free(com, M_DEVBUF); 135151078Speter splx(s); 135251078Speter } 135351078Speter return (0); 135451078Speter} 135551078Speter 135651078Speterstatic void 135751078Spetercomhardclose(com) 135851078Speter struct com_s *com; 135951078Speter{ 136051078Speter Port_t iobase; 136151078Speter int s; 136251078Speter struct tty *tp; 136351078Speter int unit; 136451078Speter 136551078Speter unit = com->unit; 136651078Speter iobase = com->iobase; 136751078Speter s = spltty(); 136851078Speter com->poll = FALSE; 136951078Speter com->poll_output = FALSE; 137051078Speter com->do_timestamp = FALSE; 137151078Speter com->do_dcd_timestamp = FALSE; 137251078Speter com->pps.ppsparam.mode = 0; 137351078Speter outb(iobase + com_cfcr, com->cfcr_image &= ~CFCR_SBREAK); 137451078Speter { 137551078Speter outb(iobase + com_ier, 0); 137651078Speter tp = com->tp; 137751078Speter if (tp->t_cflag & HUPCL 137851078Speter /* 137951078Speter * XXX we will miss any carrier drop between here and the 138051078Speter * next open. Perhaps we should watch DCD even when the 138151078Speter * port is closed; it is not sufficient to check it at 138251078Speter * the next open because it might go up and down while 138351078Speter * we're not watching. 138451078Speter */ 138551078Speter || (!com->active_out 138651078Speter && !(com->prev_modem_status & MSR_DCD) 138751078Speter && !(com->it_in.c_cflag & CLOCAL)) 138851078Speter || !(tp->t_state & TS_ISOPEN)) { 138951078Speter (void)commctl(com, TIOCM_DTR, DMBIC); 139051078Speter if (com->dtr_wait != 0 && !(com->state & CS_DTR_OFF)) { 139151078Speter timeout(siodtrwakeup, com, com->dtr_wait); 139251078Speter com->state |= CS_DTR_OFF; 139351078Speter } 139451078Speter } 139551078Speter } 139651078Speter if (com->hasfifo) { 139751078Speter /* 139851078Speter * Disable fifos so that they are off after controlled 139951078Speter * reboots. Some BIOSes fail to detect 16550s when the 140051078Speter * fifos are enabled. 140151078Speter */ 140251078Speter outb(iobase + com_fifo, 0); 140351078Speter } 140451078Speter com->active_out = FALSE; 140551078Speter wakeup(&com->active_out); 140651078Speter wakeup(TSA_CARR_ON(tp)); /* restart any wopeners */ 140751078Speter splx(s); 140851078Speter} 140951078Speter 141051078Speterstatic int 141151078Spetersioread(dev, uio, flag) 141251078Speter dev_t dev; 141351078Speter struct uio *uio; 141451078Speter int flag; 141551078Speter{ 141651078Speter int mynor; 141751078Speter struct com_s *com; 141851078Speter 141951078Speter mynor = minor(dev); 142051078Speter if (mynor & CONTROL_MASK) 142151078Speter return (ENODEV); 142251078Speter com = com_addr(MINOR_TO_UNIT(mynor)); 142351078Speter if (com->gone) 142451078Speter return (ENODEV); 142551078Speter return ((*linesw[com->tp->t_line].l_read)(com->tp, uio, flag)); 142651078Speter} 142751078Speter 142851078Speterstatic int 142951078Spetersiowrite(dev, uio, flag) 143051078Speter dev_t dev; 143151078Speter struct uio *uio; 143251078Speter int flag; 143351078Speter{ 143451078Speter int mynor; 143551078Speter struct com_s *com; 143651078Speter int unit; 143751078Speter 143851078Speter mynor = minor(dev); 143951078Speter if (mynor & CONTROL_MASK) 144051078Speter return (ENODEV); 144151078Speter 144251078Speter unit = MINOR_TO_UNIT(mynor); 144351078Speter com = com_addr(unit); 144451078Speter if (com->gone) 144551078Speter return (ENODEV); 144651078Speter /* 144751078Speter * (XXX) We disallow virtual consoles if the physical console is 144851078Speter * a serial port. This is in case there is a display attached that 144951078Speter * is not the console. In that situation we don't need/want the X 145051078Speter * server taking over the console. 145151078Speter */ 145251078Speter if (constty != NULL && unit == comconsole) 145351078Speter constty = NULL; 145451078Speter return ((*linesw[com->tp->t_line].l_write)(com->tp, uio, flag)); 145551078Speter} 145651078Speter 145751078Speterstatic void 145851078Spetersiobusycheck(chan) 145951078Speter void *chan; 146051078Speter{ 146151078Speter struct com_s *com; 146251078Speter int s; 146351078Speter 146451078Speter com = (struct com_s *)chan; 146551078Speter 146651078Speter /* 146751078Speter * Clear TS_BUSY if low-level output is complete. 146851078Speter * spl locking is sufficient because siointr1() does not set CS_BUSY. 146951078Speter * If siointr1() clears CS_BUSY after we look at it, then we'll get 147051078Speter * called again. Reading the line status port outside of siointr1() 147151078Speter * is safe because CS_BUSY is clear so there are no output interrupts 147251078Speter * to lose. 147351078Speter */ 147451078Speter s = spltty(); 147551078Speter if (com->state & CS_BUSY) 147651078Speter com->extra_state &= ~CSE_BUSYCHECK; /* False alarm. */ 147751078Speter else if ((inb(com->line_status_port) & (LSR_TSRE | LSR_TXRDY)) 147851078Speter == (LSR_TSRE | LSR_TXRDY)) { 147951078Speter com->tp->t_state &= ~TS_BUSY; 148051078Speter ttwwakeup(com->tp); 148151078Speter com->extra_state &= ~CSE_BUSYCHECK; 148251078Speter } else 148351078Speter timeout(siobusycheck, com, hz / 100); 148451078Speter splx(s); 148551078Speter} 148651078Speter 148751078Speterstatic void 148851078Spetersiodtrwakeup(chan) 148951078Speter void *chan; 149051078Speter{ 149151078Speter struct com_s *com; 149251078Speter 149351078Speter com = (struct com_s *)chan; 149451078Speter com->state &= ~CS_DTR_OFF; 149551078Speter wakeup(&com->dtr_wait); 149651078Speter} 149751078Speter 149851078Speterstatic void 149951078Spetersioinput(com) 150051078Speter struct com_s *com; 150151078Speter{ 150251078Speter u_char *buf; 150351078Speter int incc; 150451078Speter u_char line_status; 150551078Speter int recv_data; 150651078Speter struct tty *tp; 150751078Speter 150851078Speter buf = com->ibuf; 150951078Speter tp = com->tp; 151051078Speter if (!(tp->t_state & TS_ISOPEN) || !(tp->t_cflag & CREAD)) { 151151078Speter com_events -= (com->iptr - com->ibuf); 151251078Speter com->iptr = com->ibuf; 151351078Speter return; 151451078Speter } 151551078Speter if (tp->t_state & TS_CAN_BYPASS_L_RINT) { 151651078Speter /* 151751078Speter * Avoid the grotesquely inefficient lineswitch routine 151851078Speter * (ttyinput) in "raw" mode. It usually takes about 450 151951078Speter * instructions (that's without canonical processing or echo!). 152051078Speter * slinput is reasonably fast (usually 40 instructions plus 152151078Speter * call overhead). 152251078Speter */ 152351078Speter do { 152451078Speter enable_intr(); 152551078Speter incc = com->iptr - buf; 152651078Speter if (tp->t_rawq.c_cc + incc > tp->t_ihiwat 152751078Speter && (com->state & CS_RTS_IFLOW 152851078Speter || tp->t_iflag & IXOFF) 152951078Speter && !(tp->t_state & TS_TBLOCK)) 153051078Speter ttyblock(tp); 153151078Speter com->delta_error_counts[CE_TTY_BUF_OVERFLOW] 153251078Speter += b_to_q((char *)buf, incc, &tp->t_rawq); 153351078Speter buf += incc; 153451078Speter tk_nin += incc; 153551078Speter tk_rawcc += incc; 153651078Speter tp->t_rawcc += incc; 153751078Speter ttwakeup(tp); 153851078Speter if (tp->t_state & TS_TTSTOP 153951078Speter && (tp->t_iflag & IXANY 154051078Speter || tp->t_cc[VSTART] == tp->t_cc[VSTOP])) { 154151078Speter tp->t_state &= ~TS_TTSTOP; 154251078Speter tp->t_lflag &= ~FLUSHO; 154351078Speter comstart(tp); 154451078Speter } 154551078Speter disable_intr(); 154651078Speter } while (buf < com->iptr); 154751078Speter } else { 154851078Speter do { 154951078Speter enable_intr(); 155051078Speter line_status = buf[com->ierroff]; 155151078Speter recv_data = *buf++; 155251078Speter if (line_status 155351078Speter & (LSR_BI | LSR_FE | LSR_OE | LSR_PE)) { 155451078Speter if (line_status & LSR_BI) 155551078Speter recv_data |= TTY_BI; 155651078Speter if (line_status & LSR_FE) 155751078Speter recv_data |= TTY_FE; 155851078Speter if (line_status & LSR_OE) 155951078Speter recv_data |= TTY_OE; 156051078Speter if (line_status & LSR_PE) 156151078Speter recv_data |= TTY_PE; 156251078Speter } 156351078Speter (*linesw[tp->t_line].l_rint)(recv_data, tp); 156451078Speter disable_intr(); 156551078Speter } while (buf < com->iptr); 156651078Speter } 156751078Speter com_events -= (com->iptr - com->ibuf); 156851078Speter com->iptr = com->ibuf; 156951078Speter 157051078Speter /* 157151078Speter * There is now room for another low-level buffer full of input, 157251078Speter * so enable RTS if it is now disabled and there is room in the 157351078Speter * high-level buffer. 157451078Speter */ 157551078Speter if ((com->state & CS_RTS_IFLOW) && !(com->mcr_image & MCR_RTS) && 157651078Speter !(tp->t_state & TS_TBLOCK)) 157751078Speter outb(com->modem_ctl_port, com->mcr_image |= MCR_RTS); 157851078Speter} 157951078Speter 158051078Spetervoid 158151078Spetersiointr(arg) 158251078Speter void *arg; 158351078Speter{ 158451078Speter#ifndef COM_MULTIPORT 158551078Speter COM_LOCK(); 158651078Speter siointr1((struct com_s *) arg); 158751078Speter COM_UNLOCK(); 158851078Speter#else /* COM_MULTIPORT */ 158951078Speter bool_t possibly_more_intrs; 159051078Speter int unit; 159151078Speter struct com_s *com; 159251078Speter 159351078Speter /* 159451078Speter * Loop until there is no activity on any port. This is necessary 159551078Speter * to get an interrupt edge more than to avoid another interrupt. 159651078Speter * If the IRQ signal is just an OR of the IRQ signals from several 159751078Speter * devices, then the edge from one may be lost because another is 159851078Speter * on. 159951078Speter */ 160051078Speter COM_LOCK(); 160151078Speter do { 160251078Speter possibly_more_intrs = FALSE; 160351078Speter for (unit = 0; unit < NSIOTOT; ++unit) { 160451078Speter com = com_addr(unit); 160551078Speter /* 160651078Speter * XXX COM_LOCK(); 160751078Speter * would it work here, or be counter-productive? 160851078Speter */ 160951078Speter if (com != NULL 161051078Speter && !com->gone 161151078Speter && (inb(com->int_id_port) & IIR_IMASK) 161251078Speter != IIR_NOPEND) { 161351078Speter siointr1(com); 161451078Speter possibly_more_intrs = TRUE; 161551078Speter } 161651078Speter /* XXX COM_UNLOCK(); */ 161751078Speter } 161851078Speter } while (possibly_more_intrs); 161951078Speter COM_UNLOCK(); 162051078Speter#endif /* COM_MULTIPORT */ 162151078Speter} 162251078Speter 162351078Speterstatic void 162451078Spetersiointr1(com) 162551078Speter struct com_s *com; 162651078Speter{ 162751078Speter u_char line_status; 162851078Speter u_char modem_status; 162951078Speter u_char *ioptr; 163051078Speter u_char recv_data; 163151078Speter u_char int_ctl; 163251078Speter u_char int_ctl_new; 163351078Speter struct timecounter *tc; 163451078Speter u_int count; 163551078Speter 163651078Speter int_ctl = inb(com->intr_ctl_port); 163751078Speter int_ctl_new = int_ctl; 163851078Speter 163951078Speter while (!com->gone) { 164051078Speter if (com->pps.ppsparam.mode & PPS_CAPTUREBOTH) { 164151078Speter modem_status = inb(com->modem_status_port); 164251078Speter if ((modem_status ^ com->last_modem_status) & MSR_DCD) { 164351078Speter tc = timecounter; 164451078Speter count = tc->tc_get_timecount(tc); 164551078Speter pps_event(&com->pps, tc, count, 164651078Speter (modem_status & MSR_DCD) ? 164751078Speter PPS_CAPTUREASSERT : PPS_CAPTURECLEAR); 164851078Speter } 164951078Speter } 165051078Speter line_status = inb(com->line_status_port); 165151078Speter 165251078Speter /* input event? (check first to help avoid overruns) */ 165351078Speter while (line_status & LSR_RCV_MASK) { 165451078Speter /* break/unnattached error bits or real input? */ 165551078Speter if (!(line_status & LSR_RXRDY)) 165651078Speter recv_data = 0; 165751078Speter else 165851078Speter recv_data = inb(com->data_port); 165951078Speter if (line_status & (LSR_BI | LSR_FE | LSR_PE)) { 166051078Speter /* 166151078Speter * Don't store BI if IGNBRK or FE/PE if IGNPAR. 166251078Speter * Otherwise, push the work to a higher level 166351078Speter * (to handle PARMRK) if we're bypassing. 166451078Speter * Otherwise, convert BI/FE and PE+INPCK to 0. 166551078Speter * 166651078Speter * This makes bypassing work right in the 166751078Speter * usual "raw" case (IGNBRK set, and IGNPAR 166851078Speter * and INPCK clear). 166951078Speter * 167051078Speter * Note: BI together with FE/PE means just BI. 167151078Speter */ 167251078Speter if (line_status & LSR_BI) { 167351078Speter#if defined(DDB) && defined(BREAK_TO_DEBUGGER) 167451078Speter if (com->unit == comconsole) { 167551078Speter breakpoint(); 167651078Speter goto cont; 167751078Speter } 167851078Speter#endif 167951078Speter if (com->tp == NULL 168051078Speter || com->tp->t_iflag & IGNBRK) 168151078Speter goto cont; 168251078Speter } else { 168351078Speter if (com->tp == NULL 168451078Speter || com->tp->t_iflag & IGNPAR) 168551078Speter goto cont; 168651078Speter } 168751078Speter if (com->tp->t_state & TS_CAN_BYPASS_L_RINT 168851078Speter && (line_status & (LSR_BI | LSR_FE) 168951078Speter || com->tp->t_iflag & INPCK)) 169051078Speter recv_data = 0; 169151078Speter } 169251078Speter ++com->bytes_in; 169351078Speter if (com->hotchar != 0 && recv_data == com->hotchar) 169451078Speter setsofttty(); 169551078Speter ioptr = com->iptr; 169651078Speter if (ioptr >= com->ibufend) 169751078Speter CE_RECORD(com, CE_INTERRUPT_BUF_OVERFLOW); 169851078Speter else { 169951078Speter if (com->do_timestamp) 170051078Speter microtime(&com->timestamp); 170151078Speter ++com_events; 170251078Speter schedsofttty(); 170351078Speter#if 0 /* for testing input latency vs efficiency */ 170451078Speterif (com->iptr - com->ibuf == 8) 170551078Speter setsofttty(); 170651078Speter#endif 170751078Speter ioptr[0] = recv_data; 170851078Speter ioptr[com->ierroff] = line_status; 170951078Speter com->iptr = ++ioptr; 171051078Speter if (ioptr == com->ihighwater 171151078Speter && com->state & CS_RTS_IFLOW) 171251078Speter outb(com->modem_ctl_port, 171351078Speter com->mcr_image &= ~MCR_RTS); 171451078Speter if (line_status & LSR_OE) 171551078Speter CE_RECORD(com, CE_OVERRUN); 171651078Speter } 171751078Spetercont: 171851078Speter /* 171951078Speter * "& 0x7F" is to avoid the gcc-1.40 generating a slow 172051078Speter * jump from the top of the loop to here 172151078Speter */ 172251078Speter line_status = inb(com->line_status_port) & 0x7F; 172351078Speter } 172451078Speter 172551078Speter /* modem status change? (always check before doing output) */ 172651078Speter modem_status = inb(com->modem_status_port); 172751078Speter if (modem_status != com->last_modem_status) { 172851078Speter if (com->do_dcd_timestamp 172951078Speter && !(com->last_modem_status & MSR_DCD) 173051078Speter && modem_status & MSR_DCD) 173151078Speter microtime(&com->dcd_timestamp); 173251078Speter 173351078Speter /* 173451078Speter * Schedule high level to handle DCD changes. Note 173551078Speter * that we don't use the delta bits anywhere. Some 173651078Speter * UARTs mess them up, and it's easy to remember the 173751078Speter * previous bits and calculate the delta. 173851078Speter */ 173951078Speter com->last_modem_status = modem_status; 174051078Speter if (!(com->state & CS_CHECKMSR)) { 174151078Speter com_events += LOTS_OF_EVENTS; 174251078Speter com->state |= CS_CHECKMSR; 174351078Speter setsofttty(); 174451078Speter } 174551078Speter 174651078Speter /* handle CTS change immediately for crisp flow ctl */ 174751078Speter if (com->state & CS_CTS_OFLOW) { 174851078Speter if (modem_status & MSR_CTS) 174951078Speter com->state |= CS_ODEVREADY; 175051078Speter else 175151078Speter com->state &= ~CS_ODEVREADY; 175251078Speter } 175351078Speter } 175451078Speter 175551078Speter /* output queued and everything ready? */ 175651078Speter if (line_status & LSR_TXRDY 175751078Speter && com->state >= (CS_BUSY | CS_TTGO | CS_ODEVREADY)) { 175851078Speter ioptr = com->obufq.l_head; 175951078Speter if (com->tx_fifo_size > 1) { 176051078Speter u_int ocount; 176151078Speter 176251078Speter ocount = com->obufq.l_tail - ioptr; 176351078Speter if (ocount > com->tx_fifo_size) 176451078Speter ocount = com->tx_fifo_size; 176551078Speter com->bytes_out += ocount; 176651078Speter do 176751078Speter outb(com->data_port, *ioptr++); 176851078Speter while (--ocount != 0); 176951078Speter } else { 177051078Speter outb(com->data_port, *ioptr++); 177151078Speter ++com->bytes_out; 177251078Speter } 177351078Speter com->obufq.l_head = ioptr; 177451078Speter if (COM_IIR_TXRDYBUG(com->flags)) { 177551078Speter int_ctl_new = int_ctl | IER_ETXRDY; 177651078Speter } 177751078Speter if (ioptr >= com->obufq.l_tail) { 177851078Speter struct lbq *qp; 177951078Speter 178051078Speter qp = com->obufq.l_next; 178151078Speter qp->l_queued = FALSE; 178251078Speter qp = qp->l_next; 178351078Speter if (qp != NULL) { 178451078Speter com->obufq.l_head = qp->l_head; 178551078Speter com->obufq.l_tail = qp->l_tail; 178651078Speter com->obufq.l_next = qp; 178751078Speter } else { 178851078Speter /* output just completed */ 178951078Speter if ( COM_IIR_TXRDYBUG(com->flags) ) { 179051078Speter int_ctl_new = int_ctl & ~IER_ETXRDY; 179151078Speter } 179251078Speter com->state &= ~CS_BUSY; 179351078Speter } 179451078Speter if (!(com->state & CS_ODONE)) { 179551078Speter com_events += LOTS_OF_EVENTS; 179651078Speter com->state |= CS_ODONE; 179751078Speter setsofttty(); /* handle at high level ASAP */ 179851078Speter } 179951078Speter } 180051078Speter if ( COM_IIR_TXRDYBUG(com->flags) && (int_ctl != int_ctl_new)) { 180151078Speter outb(com->intr_ctl_port, int_ctl_new); 180251078Speter } 180351078Speter } 180451078Speter 180551078Speter /* finished? */ 180651078Speter#ifndef COM_MULTIPORT 180751078Speter if ((inb(com->int_id_port) & IIR_IMASK) == IIR_NOPEND) 180851078Speter#endif /* COM_MULTIPORT */ 180951078Speter return; 181051078Speter } 181151078Speter} 181251078Speter 181351078Speterstatic int 181451078Spetersioioctl(dev, cmd, data, flag, p) 181551078Speter dev_t dev; 181651078Speter u_long cmd; 181751078Speter caddr_t data; 181851078Speter int flag; 181951078Speter struct proc *p; 182051078Speter{ 182151078Speter struct com_s *com; 182251078Speter int error; 182351078Speter Port_t iobase; 182451078Speter int mynor; 182551078Speter int s; 182651078Speter struct tty *tp; 182751078Speter#if defined(COMPAT_43) || defined(COMPAT_SUNOS) 182851078Speter u_long oldcmd; 182951078Speter struct termios term; 183051078Speter#endif 183151078Speter 183251078Speter mynor = minor(dev); 183351078Speter com = com_addr(MINOR_TO_UNIT(mynor)); 183451078Speter if (com->gone) 183551078Speter return (ENODEV); 183651078Speter iobase = com->iobase; 183751078Speter if (mynor & CONTROL_MASK) { 183851078Speter struct termios *ct; 183951078Speter 184051078Speter switch (mynor & CONTROL_MASK) { 184151078Speter case CONTROL_INIT_STATE: 184251078Speter ct = mynor & CALLOUT_MASK ? &com->it_out : &com->it_in; 184351078Speter break; 184451078Speter case CONTROL_LOCK_STATE: 184551078Speter ct = mynor & CALLOUT_MASK ? &com->lt_out : &com->lt_in; 184651078Speter break; 184751078Speter default: 184851078Speter return (ENODEV); /* /dev/nodev */ 184951078Speter } 185051078Speter switch (cmd) { 185151078Speter case TIOCSETA: 185251078Speter error = suser(p); 185351078Speter if (error != 0) 185451078Speter return (error); 185551078Speter *ct = *(struct termios *)data; 185651078Speter return (0); 185751078Speter case TIOCGETA: 185851078Speter *(struct termios *)data = *ct; 185951078Speter return (0); 186051078Speter case TIOCGETD: 186151078Speter *(int *)data = TTYDISC; 186251078Speter return (0); 186351078Speter case TIOCGWINSZ: 186451078Speter bzero(data, sizeof(struct winsize)); 186551078Speter return (0); 186651078Speter default: 186751078Speter return (ENOTTY); 186851078Speter } 186951078Speter } 187051078Speter tp = com->tp; 187151078Speter#if defined(COMPAT_43) || defined(COMPAT_SUNOS) 187251078Speter term = tp->t_termios; 187351078Speter oldcmd = cmd; 187451078Speter error = ttsetcompat(tp, &cmd, data, &term); 187551078Speter if (error != 0) 187651078Speter return (error); 187751078Speter if (cmd != oldcmd) 187851078Speter data = (caddr_t)&term; 187951078Speter#endif 188051078Speter if (cmd == TIOCSETA || cmd == TIOCSETAW || cmd == TIOCSETAF) { 188151078Speter int cc; 188251078Speter struct termios *dt = (struct termios *)data; 188351078Speter struct termios *lt = mynor & CALLOUT_MASK 188451078Speter ? &com->lt_out : &com->lt_in; 188551078Speter 188651078Speter dt->c_iflag = (tp->t_iflag & lt->c_iflag) 188751078Speter | (dt->c_iflag & ~lt->c_iflag); 188851078Speter dt->c_oflag = (tp->t_oflag & lt->c_oflag) 188951078Speter | (dt->c_oflag & ~lt->c_oflag); 189051078Speter dt->c_cflag = (tp->t_cflag & lt->c_cflag) 189151078Speter | (dt->c_cflag & ~lt->c_cflag); 189251078Speter dt->c_lflag = (tp->t_lflag & lt->c_lflag) 189351078Speter | (dt->c_lflag & ~lt->c_lflag); 189451078Speter for (cc = 0; cc < NCCS; ++cc) 189551078Speter if (lt->c_cc[cc] != 0) 189651078Speter dt->c_cc[cc] = tp->t_cc[cc]; 189751078Speter if (lt->c_ispeed != 0) 189851078Speter dt->c_ispeed = tp->t_ispeed; 189951078Speter if (lt->c_ospeed != 0) 190051078Speter dt->c_ospeed = tp->t_ospeed; 190151078Speter } 190251078Speter error = (*linesw[tp->t_line].l_ioctl)(tp, cmd, data, flag, p); 190351078Speter if (error != ENOIOCTL) 190451078Speter return (error); 190551078Speter s = spltty(); 190651078Speter error = ttioctl(tp, cmd, data, flag); 190751078Speter disc_optim(tp, &tp->t_termios, com); 190851078Speter if (error != ENOIOCTL) { 190951078Speter splx(s); 191051078Speter return (error); 191151078Speter } 191251078Speter switch (cmd) { 191351078Speter case TIOCSBRK: 191451078Speter outb(iobase + com_cfcr, com->cfcr_image |= CFCR_SBREAK); 191551078Speter break; 191651078Speter case TIOCCBRK: 191751078Speter outb(iobase + com_cfcr, com->cfcr_image &= ~CFCR_SBREAK); 191851078Speter break; 191951078Speter case TIOCSDTR: 192051078Speter (void)commctl(com, TIOCM_DTR, DMBIS); 192151078Speter break; 192251078Speter case TIOCCDTR: 192351078Speter (void)commctl(com, TIOCM_DTR, DMBIC); 192451078Speter break; 192551078Speter /* 192651078Speter * XXX should disallow changing MCR_RTS if CS_RTS_IFLOW is set. The 192751078Speter * changes get undone on the next call to comparam(). 192851078Speter */ 192951078Speter case TIOCMSET: 193051078Speter (void)commctl(com, *(int *)data, DMSET); 193151078Speter break; 193251078Speter case TIOCMBIS: 193351078Speter (void)commctl(com, *(int *)data, DMBIS); 193451078Speter break; 193551078Speter case TIOCMBIC: 193651078Speter (void)commctl(com, *(int *)data, DMBIC); 193751078Speter break; 193851078Speter case TIOCMGET: 193951078Speter *(int *)data = commctl(com, 0, DMGET); 194051078Speter break; 194151078Speter case TIOCMSDTRWAIT: 194251078Speter /* must be root since the wait applies to following logins */ 194351078Speter error = suser(p); 194451078Speter if (error != 0) { 194551078Speter splx(s); 194651078Speter return (error); 194751078Speter } 194851078Speter com->dtr_wait = *(int *)data * hz / 100; 194951078Speter break; 195051078Speter case TIOCMGDTRWAIT: 195151078Speter *(int *)data = com->dtr_wait * 100 / hz; 195251078Speter break; 195351078Speter case TIOCTIMESTAMP: 195451078Speter com->do_timestamp = TRUE; 195551078Speter *(struct timeval *)data = com->timestamp; 195651078Speter break; 195751078Speter case TIOCDCDTIMESTAMP: 195851078Speter com->do_dcd_timestamp = TRUE; 195951078Speter *(struct timeval *)data = com->dcd_timestamp; 196051078Speter break; 196151078Speter default: 196251078Speter splx(s); 196351078Speter error = pps_ioctl(cmd, data, &com->pps); 196451078Speter if (error == ENODEV) 196551078Speter error = ENOTTY; 196651078Speter return (error); 196751078Speter } 196851078Speter splx(s); 196951078Speter return (0); 197051078Speter} 197151078Speter 197251078Speterstatic void 197351078Spetersiopoll() 197451078Speter{ 197551078Speter int unit; 197651078Speter 197751078Speter if (com_events == 0) 197851078Speter return; 197951078Speterrepeat: 198051078Speter for (unit = 0; unit < NSIOTOT; ++unit) { 198151078Speter struct com_s *com; 198251078Speter int incc; 198351078Speter struct tty *tp; 198451078Speter 198551078Speter com = com_addr(unit); 198651078Speter if (com == NULL) 198751078Speter continue; 198851078Speter tp = com->tp; 198951078Speter if (tp == NULL || com->gone) { 199051078Speter /* 199151078Speter * Discard any events related to never-opened or 199251078Speter * going-away devices. 199351078Speter */ 199451078Speter disable_intr(); 199551078Speter incc = com->iptr - com->ibuf; 199651078Speter com->iptr = com->ibuf; 199751078Speter if (com->state & CS_CHECKMSR) { 199851078Speter incc += LOTS_OF_EVENTS; 199951078Speter com->state &= ~CS_CHECKMSR; 200051078Speter } 200151078Speter com_events -= incc; 200251078Speter enable_intr(); 200351078Speter continue; 200451078Speter } 200551078Speter if (com->iptr != com->ibuf) { 200651078Speter disable_intr(); 200751078Speter sioinput(com); 200851078Speter enable_intr(); 200951078Speter } 201051078Speter if (com->state & CS_CHECKMSR) { 201151078Speter u_char delta_modem_status; 201251078Speter 201351078Speter disable_intr(); 201451078Speter delta_modem_status = com->last_modem_status 201551078Speter ^ com->prev_modem_status; 201651078Speter com->prev_modem_status = com->last_modem_status; 201751078Speter com_events -= LOTS_OF_EVENTS; 201851078Speter com->state &= ~CS_CHECKMSR; 201951078Speter enable_intr(); 202051078Speter if (delta_modem_status & MSR_DCD) 202151078Speter (*linesw[tp->t_line].l_modem) 202251078Speter (tp, com->prev_modem_status & MSR_DCD); 202351078Speter } 202451078Speter if (com->state & CS_ODONE) { 202551078Speter disable_intr(); 202651078Speter com_events -= LOTS_OF_EVENTS; 202751078Speter com->state &= ~CS_ODONE; 202851078Speter enable_intr(); 202951078Speter if (!(com->state & CS_BUSY) 203051078Speter && !(com->extra_state & CSE_BUSYCHECK)) { 203151078Speter timeout(siobusycheck, com, hz / 100); 203251078Speter com->extra_state |= CSE_BUSYCHECK; 203351078Speter } 203451078Speter (*linesw[tp->t_line].l_start)(tp); 203551078Speter } 203651078Speter if (com_events == 0) 203751078Speter break; 203851078Speter } 203951078Speter if (com_events >= LOTS_OF_EVENTS) 204051078Speter goto repeat; 204151078Speter} 204251078Speter 204351078Speterstatic int 204451078Spetercomparam(tp, t) 204551078Speter struct tty *tp; 204651078Speter struct termios *t; 204751078Speter{ 204851078Speter u_int cfcr; 204951078Speter int cflag; 205051078Speter struct com_s *com; 205151078Speter int divisor; 205251078Speter u_char dlbh; 205351078Speter u_char dlbl; 205451078Speter Port_t iobase; 205551078Speter int s; 205651078Speter int unit; 205751078Speter 205851078Speter /* do historical conversions */ 205951078Speter if (t->c_ispeed == 0) 206051078Speter t->c_ispeed = t->c_ospeed; 206151078Speter 206251078Speter /* check requested parameters */ 206351078Speter divisor = ttspeedtab(t->c_ospeed, comspeedtab); 206451078Speter if (divisor < 0 || (divisor > 0 && t->c_ispeed != t->c_ospeed)) 206551078Speter return (EINVAL); 206651078Speter 206751078Speter /* parameters are OK, convert them to the com struct and the device */ 206851078Speter unit = DEV_TO_UNIT(tp->t_dev); 206951078Speter com = com_addr(unit); 207051078Speter iobase = com->iobase; 207151078Speter s = spltty(); 207251078Speter if (divisor == 0) 207351078Speter (void)commctl(com, TIOCM_DTR, DMBIC); /* hang up line */ 207451078Speter else 207551078Speter (void)commctl(com, TIOCM_DTR, DMBIS); 207651078Speter cflag = t->c_cflag; 207751078Speter switch (cflag & CSIZE) { 207851078Speter case CS5: 207951078Speter cfcr = CFCR_5BITS; 208051078Speter break; 208151078Speter case CS6: 208251078Speter cfcr = CFCR_6BITS; 208351078Speter break; 208451078Speter case CS7: 208551078Speter cfcr = CFCR_7BITS; 208651078Speter break; 208751078Speter default: 208851078Speter cfcr = CFCR_8BITS; 208951078Speter break; 209051078Speter } 209151078Speter if (cflag & PARENB) { 209251078Speter cfcr |= CFCR_PENAB; 209351078Speter if (!(cflag & PARODD)) 209451078Speter cfcr |= CFCR_PEVEN; 209551078Speter } 209651078Speter if (cflag & CSTOPB) 209751078Speter cfcr |= CFCR_STOPB; 209851078Speter 209951078Speter if (com->hasfifo && divisor != 0) { 210051078Speter /* 210151078Speter * Use a fifo trigger level low enough so that the input 210251078Speter * latency from the fifo is less than about 16 msec and 210351078Speter * the total latency is less than about 30 msec. These 210451078Speter * latencies are reasonable for humans. Serial comms 210551078Speter * protocols shouldn't expect anything better since modem 210651078Speter * latencies are larger. 210751078Speter */ 210851078Speter com->fifo_image = t->c_ospeed <= 4800 210951078Speter ? FIFO_ENABLE : FIFO_ENABLE | FIFO_RX_HIGH; 211051078Speter#ifdef COM_ESP 211151078Speter /* 211251078Speter * The Hayes ESP card needs the fifo DMA mode bit set 211351078Speter * in compatibility mode. If not, it will interrupt 211451078Speter * for each character received. 211551078Speter */ 211651078Speter if (com->esp) 211751078Speter com->fifo_image |= FIFO_DMA_MODE; 211851078Speter#endif 211951078Speter outb(iobase + com_fifo, com->fifo_image); 212051078Speter } 212151078Speter 212251078Speter /* 212351078Speter * This returns with interrupts disabled so that we can complete 212451078Speter * the speed change atomically. Keeping interrupts disabled is 212551078Speter * especially important while com_data is hidden. 212651078Speter */ 212751078Speter (void) siosetwater(com, t->c_ispeed); 212851078Speter 212951078Speter if (divisor != 0) { 213051078Speter outb(iobase + com_cfcr, cfcr | CFCR_DLAB); 213151078Speter /* 213251078Speter * Only set the divisor registers if they would change, 213351078Speter * since on some 16550 incompatibles (UMC8669F), setting 213451078Speter * them while input is arriving them loses sync until 213551078Speter * data stops arriving. 213651078Speter */ 213751078Speter dlbl = divisor & 0xFF; 213851078Speter if (inb(iobase + com_dlbl) != dlbl) 213951078Speter outb(iobase + com_dlbl, dlbl); 214051078Speter dlbh = (u_int) divisor >> 8; 214151078Speter if (inb(iobase + com_dlbh) != dlbh) 214251078Speter outb(iobase + com_dlbh, dlbh); 214351078Speter } 214451078Speter 214551078Speter 214651078Speter outb(iobase + com_cfcr, com->cfcr_image = cfcr); 214751078Speter 214851078Speter if (!(tp->t_state & TS_TTSTOP)) 214951078Speter com->state |= CS_TTGO; 215051078Speter 215151078Speter if (cflag & CRTS_IFLOW) { 215251078Speter if (com->st16650a) { 215351078Speter outb(iobase + com_cfcr, 0xbf); 215451078Speter outb(iobase + com_fifo, inb(iobase + com_fifo) | 0x40); 215551078Speter } 215651078Speter com->state |= CS_RTS_IFLOW; 215751078Speter /* 215851078Speter * If CS_RTS_IFLOW just changed from off to on, the change 215951078Speter * needs to be propagated to MCR_RTS. This isn't urgent, 216051078Speter * so do it later by calling comstart() instead of repeating 216151078Speter * a lot of code from comstart() here. 216251078Speter */ 216351078Speter } else if (com->state & CS_RTS_IFLOW) { 216451078Speter com->state &= ~CS_RTS_IFLOW; 216551078Speter /* 216651078Speter * CS_RTS_IFLOW just changed from on to off. Force MCR_RTS 216751078Speter * on here, since comstart() won't do it later. 216851078Speter */ 216951078Speter outb(com->modem_ctl_port, com->mcr_image |= MCR_RTS); 217051078Speter if (com->st16650a) { 217151078Speter outb(iobase + com_cfcr, 0xbf); 217251078Speter outb(iobase + com_fifo, inb(iobase + com_fifo) & ~0x40); 217351078Speter } 217451078Speter } 217551078Speter 217651078Speter 217751078Speter /* 217851078Speter * Set up state to handle output flow control. 217951078Speter * XXX - worth handling MDMBUF (DCD) flow control at the lowest level? 218051078Speter * Now has 10+ msec latency, while CTS flow has 50- usec latency. 218151078Speter */ 218251078Speter com->state |= CS_ODEVREADY; 218351078Speter com->state &= ~CS_CTS_OFLOW; 218451078Speter if (cflag & CCTS_OFLOW) { 218551078Speter com->state |= CS_CTS_OFLOW; 218651078Speter if (!(com->last_modem_status & MSR_CTS)) 218751078Speter com->state &= ~CS_ODEVREADY; 218851078Speter if (com->st16650a) { 218951078Speter outb(iobase + com_cfcr, 0xbf); 219051078Speter outb(iobase + com_fifo, inb(iobase + com_fifo) | 0x80); 219151078Speter } 219251078Speter } else { 219351078Speter if (com->st16650a) { 219451078Speter outb(iobase + com_cfcr, 0xbf); 219551078Speter outb(iobase + com_fifo, inb(iobase + com_fifo) & ~0x80); 219651078Speter } 219751078Speter } 219851078Speter 219951078Speter 220051078Speter outb(iobase + com_cfcr, com->cfcr_image); 220151078Speter 220251078Speter 220351078Speter /* XXX shouldn't call functions while intrs are disabled. */ 220451078Speter disc_optim(tp, t, com); 220551078Speter /* 220651078Speter * Recover from fiddling with CS_TTGO. We used to call siointr1() 220751078Speter * unconditionally, but that defeated the careful discarding of 220851078Speter * stale input in sioopen(). 220951078Speter */ 221051078Speter if (com->state >= (CS_BUSY | CS_TTGO)) 221151078Speter siointr1(com); 221251078Speter 221351078Speter enable_intr(); 221451078Speter splx(s); 221551078Speter comstart(tp); 221651078Speter if (com->ibufold != NULL) { 221751078Speter free(com->ibufold, M_DEVBUF); 221851078Speter com->ibufold = NULL; 221951078Speter } 222051078Speter return (0); 222151078Speter} 222251078Speter 222351078Speterstatic int 222451078Spetersiosetwater(com, speed) 222551078Speter struct com_s *com; 222651078Speter speed_t speed; 222751078Speter{ 222851078Speter int cp4ticks; 222951078Speter u_char *ibuf; 223051078Speter int ibufsize; 223151078Speter struct tty *tp; 223251078Speter 223351078Speter /* 223451078Speter * Make the buffer size large enough to handle a softtty interrupt 223551078Speter * latency of about 2 ticks without loss of throughput or data 223651078Speter * (about 3 ticks if input flow control is not used or not honoured, 223751078Speter * but a bit less for CS5-CS7 modes). 223851078Speter */ 223951078Speter cp4ticks = speed / 10 / hz * 4; 224051078Speter for (ibufsize = 128; ibufsize < cp4ticks;) 224151078Speter ibufsize <<= 1; 224251078Speter if (ibufsize == com->ibufsize) { 224351078Speter disable_intr(); 224451078Speter return (0); 224551078Speter } 224651078Speter 224751078Speter /* 224851078Speter * Allocate input buffer. The extra factor of 2 in the size is 224951078Speter * to allow for an error byte for each input byte. 225051078Speter */ 225151078Speter ibuf = malloc(2 * ibufsize, M_DEVBUF, M_NOWAIT); 225251078Speter if (ibuf == NULL) { 225351078Speter disable_intr(); 225451078Speter return (ENOMEM); 225551078Speter } 225651078Speter 225751078Speter /* Initialize non-critical variables. */ 225851078Speter com->ibufold = com->ibuf; 225951078Speter com->ibufsize = ibufsize; 226051078Speter tp = com->tp; 226151078Speter if (tp != NULL) { 226251078Speter tp->t_ififosize = 2 * ibufsize; 226351078Speter tp->t_ispeedwat = (speed_t)-1; 226451078Speter tp->t_ospeedwat = (speed_t)-1; 226551078Speter } 226651078Speter 226751078Speter /* 226851078Speter * Read current input buffer, if any. Continue with interrupts 226951078Speter * disabled. 227051078Speter */ 227151078Speter disable_intr(); 227251078Speter if (com->iptr != com->ibuf) 227351078Speter sioinput(com); 227451078Speter 227551078Speter /*- 227651078Speter * Initialize critical variables, including input buffer watermarks. 227751078Speter * The external device is asked to stop sending when the buffer 227851078Speter * exactly reaches high water, or when the high level requests it. 227951078Speter * The high level is notified immediately (rather than at a later 228051078Speter * clock tick) when this watermark is reached. 228151078Speter * The buffer size is chosen so the watermark should almost never 228251078Speter * be reached. 228351078Speter * The low watermark is invisibly 0 since the buffer is always 228451078Speter * emptied all at once. 228551078Speter */ 228651078Speter com->iptr = com->ibuf = ibuf; 228751078Speter com->ibufend = ibuf + ibufsize; 228851078Speter com->ierroff = ibufsize; 228951078Speter com->ihighwater = ibuf + 3 * ibufsize / 4; 229051078Speter return (0); 229151078Speter} 229251078Speter 229351078Speterstatic void 229451078Spetercomstart(tp) 229551078Speter struct tty *tp; 229651078Speter{ 229751078Speter struct com_s *com; 229851078Speter int s; 229951078Speter int unit; 230051078Speter 230151078Speter unit = DEV_TO_UNIT(tp->t_dev); 230251078Speter com = com_addr(unit); 230351078Speter s = spltty(); 230451078Speter disable_intr(); 230551078Speter if (tp->t_state & TS_TTSTOP) 230651078Speter com->state &= ~CS_TTGO; 230751078Speter else 230851078Speter com->state |= CS_TTGO; 230951078Speter if (tp->t_state & TS_TBLOCK) { 231051078Speter if (com->mcr_image & MCR_RTS && com->state & CS_RTS_IFLOW) 231151078Speter outb(com->modem_ctl_port, com->mcr_image &= ~MCR_RTS); 231251078Speter } else { 231351078Speter if (!(com->mcr_image & MCR_RTS) && com->iptr < com->ihighwater 231451078Speter && com->state & CS_RTS_IFLOW) 231551078Speter outb(com->modem_ctl_port, com->mcr_image |= MCR_RTS); 231651078Speter } 231751078Speter enable_intr(); 231851078Speter if (tp->t_state & (TS_TIMEOUT | TS_TTSTOP)) { 231951078Speter ttwwakeup(tp); 232051078Speter splx(s); 232151078Speter return; 232251078Speter } 232351078Speter if (tp->t_outq.c_cc != 0) { 232451078Speter struct lbq *qp; 232551078Speter struct lbq *next; 232651078Speter 232751078Speter if (!com->obufs[0].l_queued) { 232851078Speter com->obufs[0].l_tail 232951078Speter = com->obuf1 + q_to_b(&tp->t_outq, com->obuf1, 233051078Speter sizeof com->obuf1); 233151078Speter com->obufs[0].l_next = NULL; 233251078Speter com->obufs[0].l_queued = TRUE; 233351078Speter disable_intr(); 233451078Speter if (com->state & CS_BUSY) { 233551078Speter qp = com->obufq.l_next; 233651078Speter while ((next = qp->l_next) != NULL) 233751078Speter qp = next; 233851078Speter qp->l_next = &com->obufs[0]; 233951078Speter } else { 234051078Speter com->obufq.l_head = com->obufs[0].l_head; 234151078Speter com->obufq.l_tail = com->obufs[0].l_tail; 234251078Speter com->obufq.l_next = &com->obufs[0]; 234351078Speter com->state |= CS_BUSY; 234451078Speter } 234551078Speter enable_intr(); 234651078Speter } 234751078Speter if (tp->t_outq.c_cc != 0 && !com->obufs[1].l_queued) { 234851078Speter com->obufs[1].l_tail 234951078Speter = com->obuf2 + q_to_b(&tp->t_outq, com->obuf2, 235051078Speter sizeof com->obuf2); 235151078Speter com->obufs[1].l_next = NULL; 235251078Speter com->obufs[1].l_queued = TRUE; 235351078Speter disable_intr(); 235451078Speter if (com->state & CS_BUSY) { 235551078Speter qp = com->obufq.l_next; 235651078Speter while ((next = qp->l_next) != NULL) 235751078Speter qp = next; 235851078Speter qp->l_next = &com->obufs[1]; 235951078Speter } else { 236051078Speter com->obufq.l_head = com->obufs[1].l_head; 236151078Speter com->obufq.l_tail = com->obufs[1].l_tail; 236251078Speter com->obufq.l_next = &com->obufs[1]; 236351078Speter com->state |= CS_BUSY; 236451078Speter } 236551078Speter enable_intr(); 236651078Speter } 236751078Speter tp->t_state |= TS_BUSY; 236851078Speter } 236951078Speter disable_intr(); 237051078Speter if (com->state >= (CS_BUSY | CS_TTGO)) 237151078Speter siointr1(com); /* fake interrupt to start output */ 237251078Speter enable_intr(); 237351078Speter ttwwakeup(tp); 237451078Speter splx(s); 237551078Speter} 237651078Speter 237751078Speterstatic void 237851078Spetersiostop(tp, rw) 237951078Speter struct tty *tp; 238051078Speter int rw; 238151078Speter{ 238251078Speter struct com_s *com; 238351078Speter 238451078Speter com = com_addr(DEV_TO_UNIT(tp->t_dev)); 238551078Speter if (com->gone) 238651078Speter return; 238751078Speter disable_intr(); 238851078Speter if (rw & FWRITE) { 238951078Speter if (com->hasfifo) 239051078Speter#ifdef COM_ESP 239151078Speter /* XXX avoid h/w bug. */ 239251078Speter if (!com->esp) 239351078Speter#endif 239451078Speter outb(com->iobase + com_fifo, 239551078Speter FIFO_XMT_RST | com->fifo_image); 239651078Speter com->obufs[0].l_queued = FALSE; 239751078Speter com->obufs[1].l_queued = FALSE; 239851078Speter if (com->state & CS_ODONE) 239951078Speter com_events -= LOTS_OF_EVENTS; 240051078Speter com->state &= ~(CS_ODONE | CS_BUSY); 240151078Speter com->tp->t_state &= ~TS_BUSY; 240251078Speter } 240351078Speter if (rw & FREAD) { 240451078Speter if (com->hasfifo) 240551078Speter#ifdef COM_ESP 240651078Speter /* XXX avoid h/w bug. */ 240751078Speter if (!com->esp) 240851078Speter#endif 240951078Speter outb(com->iobase + com_fifo, 241051078Speter FIFO_RCV_RST | com->fifo_image); 241151078Speter com_events -= (com->iptr - com->ibuf); 241251078Speter com->iptr = com->ibuf; 241351078Speter } 241451078Speter enable_intr(); 241551078Speter comstart(tp); 241651078Speter} 241751078Speter 241851078Speterstatic struct tty * 241951078Spetersiodevtotty(dev) 242051078Speter dev_t dev; 242151078Speter{ 242251078Speter int mynor; 242351078Speter int unit; 242451078Speter 242551078Speter mynor = minor(dev); 242651078Speter if (mynor & CONTROL_MASK) 242751078Speter return (NULL); 242851078Speter unit = MINOR_TO_UNIT(mynor); 242951078Speter if ((u_int) unit >= NSIOTOT) 243051078Speter return (NULL); 243151078Speter return (dev->si_tty); 243251078Speter} 243351078Speter 243451078Speterstatic int 243551078Spetercommctl(com, bits, how) 243651078Speter struct com_s *com; 243751078Speter int bits; 243851078Speter int how; 243951078Speter{ 244051078Speter int mcr; 244151078Speter int msr; 244251078Speter 244351078Speter if (how == DMGET) { 244451078Speter bits = TIOCM_LE; /* XXX - always enabled while open */ 244551078Speter mcr = com->mcr_image; 244651078Speter if (mcr & MCR_DTR) 244751078Speter bits |= TIOCM_DTR; 244851078Speter if (mcr & MCR_RTS) 244951078Speter bits |= TIOCM_RTS; 245051078Speter msr = com->prev_modem_status; 245151078Speter if (msr & MSR_CTS) 245251078Speter bits |= TIOCM_CTS; 245351078Speter if (msr & MSR_DCD) 245451078Speter bits |= TIOCM_CD; 245551078Speter if (msr & MSR_DSR) 245651078Speter bits |= TIOCM_DSR; 245751078Speter /* 245851078Speter * XXX - MSR_RI is naturally volatile, and we make MSR_TERI 245951078Speter * more volatile by reading the modem status a lot. Perhaps 246051078Speter * we should latch both bits until the status is read here. 246151078Speter */ 246251078Speter if (msr & (MSR_RI | MSR_TERI)) 246351078Speter bits |= TIOCM_RI; 246451078Speter return (bits); 246551078Speter } 246651078Speter mcr = 0; 246751078Speter if (bits & TIOCM_DTR) 246851078Speter mcr |= MCR_DTR; 246951078Speter if (bits & TIOCM_RTS) 247051078Speter mcr |= MCR_RTS; 247151078Speter if (com->gone) 247251078Speter return(0); 247351078Speter disable_intr(); 247451078Speter switch (how) { 247551078Speter case DMSET: 247651078Speter outb(com->modem_ctl_port, 247751078Speter com->mcr_image = mcr | (com->mcr_image & MCR_IENABLE)); 247851078Speter break; 247951078Speter case DMBIS: 248051078Speter outb(com->modem_ctl_port, com->mcr_image |= mcr); 248151078Speter break; 248251078Speter case DMBIC: 248351078Speter outb(com->modem_ctl_port, com->mcr_image &= ~mcr); 248451078Speter break; 248551078Speter } 248651078Speter enable_intr(); 248751078Speter return (0); 248851078Speter} 248951078Speter 249051078Speterstatic void 249151078Spetersiosettimeout() 249251078Speter{ 249351078Speter struct com_s *com; 249451078Speter bool_t someopen; 249551078Speter int unit; 249651078Speter 249751078Speter /* 249851078Speter * Set our timeout period to 1 second if no polled devices are open. 249951078Speter * Otherwise set it to max(1/200, 1/hz). 250051078Speter * Enable timeouts iff some device is open. 250151078Speter */ 250251078Speter untimeout(comwakeup, (void *)NULL, sio_timeout_handle); 250351078Speter sio_timeout = hz; 250451078Speter someopen = FALSE; 250551078Speter for (unit = 0; unit < NSIOTOT; ++unit) { 250651078Speter com = com_addr(unit); 250751078Speter if (com != NULL && com->tp != NULL 250851078Speter && com->tp->t_state & TS_ISOPEN && !com->gone) { 250951078Speter someopen = TRUE; 251051078Speter if (com->poll || com->poll_output) { 251151078Speter sio_timeout = hz > 200 ? hz / 200 : 1; 251251078Speter break; 251351078Speter } 251451078Speter } 251551078Speter } 251651078Speter if (someopen) { 251751078Speter sio_timeouts_until_log = hz / sio_timeout; 251851078Speter sio_timeout_handle = timeout(comwakeup, (void *)NULL, 251951078Speter sio_timeout); 252051078Speter } else { 252151078Speter /* Flush error messages, if any. */ 252251078Speter sio_timeouts_until_log = 1; 252351078Speter comwakeup((void *)NULL); 252451078Speter untimeout(comwakeup, (void *)NULL, sio_timeout_handle); 252551078Speter } 252651078Speter} 252751078Speter 252851078Speterstatic void 252951078Spetercomwakeup(chan) 253051078Speter void *chan; 253151078Speter{ 253251078Speter struct com_s *com; 253351078Speter int unit; 253451078Speter 253551078Speter sio_timeout_handle = timeout(comwakeup, (void *)NULL, sio_timeout); 253651078Speter 253751078Speter /* 253851078Speter * Recover from lost output interrupts. 253951078Speter * Poll any lines that don't use interrupts. 254051078Speter */ 254151078Speter for (unit = 0; unit < NSIOTOT; ++unit) { 254251078Speter com = com_addr(unit); 254351078Speter if (com != NULL && !com->gone 254451078Speter && (com->state >= (CS_BUSY | CS_TTGO) || com->poll)) { 254551078Speter disable_intr(); 254651078Speter siointr1(com); 254751078Speter enable_intr(); 254851078Speter } 254951078Speter } 255051078Speter 255151078Speter /* 255251078Speter * Check for and log errors, but not too often. 255351078Speter */ 255451078Speter if (--sio_timeouts_until_log > 0) 255551078Speter return; 255651078Speter sio_timeouts_until_log = hz / sio_timeout; 255751078Speter for (unit = 0; unit < NSIOTOT; ++unit) { 255851078Speter int errnum; 255951078Speter 256051078Speter com = com_addr(unit); 256151078Speter if (com == NULL) 256251078Speter continue; 256351078Speter if (com->gone) 256451078Speter continue; 256551078Speter for (errnum = 0; errnum < CE_NTYPES; ++errnum) { 256651078Speter u_int delta; 256751078Speter u_long total; 256851078Speter 256951078Speter disable_intr(); 257051078Speter delta = com->delta_error_counts[errnum]; 257151078Speter com->delta_error_counts[errnum] = 0; 257251078Speter enable_intr(); 257351078Speter if (delta == 0) 257451078Speter continue; 257551078Speter total = com->error_counts[errnum] += delta; 257651078Speter log(LOG_ERR, "sio%d: %u more %s%s (total %lu)\n", 257751078Speter unit, delta, error_desc[errnum], 257851078Speter delta == 1 ? "" : "s", total); 257951078Speter } 258051078Speter } 258151078Speter} 258251078Speter 258351078Speterstatic void 258451078Speterdisc_optim(tp, t, com) 258551078Speter struct tty *tp; 258651078Speter struct termios *t; 258751078Speter struct com_s *com; 258851078Speter{ 258951078Speter if (!(t->c_iflag & (ICRNL | IGNCR | IMAXBEL | INLCR | ISTRIP | IXON)) 259051078Speter && (!(t->c_iflag & BRKINT) || (t->c_iflag & IGNBRK)) 259151078Speter && (!(t->c_iflag & PARMRK) 259251078Speter || (t->c_iflag & (IGNPAR | IGNBRK)) == (IGNPAR | IGNBRK)) 259351078Speter && !(t->c_lflag & (ECHO | ICANON | IEXTEN | ISIG | PENDIN)) 259451078Speter && linesw[tp->t_line].l_rint == ttyinput) 259551078Speter tp->t_state |= TS_CAN_BYPASS_L_RINT; 259651078Speter else 259751078Speter tp->t_state &= ~TS_CAN_BYPASS_L_RINT; 259851078Speter com->hotchar = linesw[tp->t_line].l_hotchar; 259951078Speter} 260051078Speter 260151078Speter/* 260251078Speter * Following are all routines needed for SIO to act as console 260351078Speter */ 260451078Speter#include <sys/cons.h> 260551078Speter 260651078Speterstruct siocnstate { 260751078Speter u_char dlbl; 260851078Speter u_char dlbh; 260951078Speter u_char ier; 261051078Speter u_char cfcr; 261151078Speter u_char mcr; 261251078Speter}; 261351078Speter 261451078Speterstatic speed_t siocngetspeed __P((Port_t, struct speedtab *)); 261551078Speterstatic void siocnclose __P((struct siocnstate *sp, Port_t iobase)); 261651078Speterstatic void siocnopen __P((struct siocnstate *sp, Port_t iobase, int speed)); 261751078Speterstatic void siocntxwait __P((Port_t iobase)); 261851078Speter 261951078Speterstatic cn_probe_t siocnprobe; 262051078Speterstatic cn_init_t siocninit; 262151078Speterstatic cn_checkc_t siocncheckc; 262251078Speterstatic cn_getc_t siocngetc; 262351078Speterstatic cn_putc_t siocnputc; 262451078Speter 262551078Speter#ifdef __i386__ 262651078SpeterCONS_DRIVER(sio, siocnprobe, siocninit, NULL, siocngetc, siocncheckc, siocnputc); 262751078Speter 262851078Speter#endif 262951078Speter 263051078Speter/* To get the GDB related variables */ 263151078Speter#if DDB > 0 263251078Speter#include <ddb/ddb.h> 263351078Speter#endif 263451078Speter 263551078Speterstatic void 263651078Spetersiocntxwait(iobase) 263751078Speter Port_t iobase; 263851078Speter{ 263951078Speter int timo; 264051078Speter 264151078Speter /* 264251078Speter * Wait for any pending transmission to finish. Required to avoid 264351078Speter * the UART lockup bug when the speed is changed, and for normal 264451078Speter * transmits. 264551078Speter */ 264651078Speter timo = 100000; 264751078Speter while ((inb(iobase + com_lsr) & (LSR_TSRE | LSR_TXRDY)) 264851078Speter != (LSR_TSRE | LSR_TXRDY) && --timo != 0) 264951078Speter ; 265051078Speter} 265151078Speter 265251078Speter/* 265351078Speter * Read the serial port specified and try to figure out what speed 265451078Speter * it's currently running at. We're assuming the serial port has 265551078Speter * been initialized and is basicly idle. This routine is only intended 265651078Speter * to be run at system startup. 265751078Speter * 265851078Speter * If the value read from the serial port doesn't make sense, return 0. 265951078Speter */ 266051078Speter 266151078Speterstatic speed_t 266251078Spetersiocngetspeed(iobase, table) 266351078Speter Port_t iobase; 266451078Speter struct speedtab *table; 266551078Speter{ 266651078Speter int code; 266751078Speter u_char dlbh; 266851078Speter u_char dlbl; 266951078Speter u_char cfcr; 267051078Speter 267151078Speter cfcr = inb(iobase + com_cfcr); 267251078Speter outb(iobase + com_cfcr, CFCR_DLAB | cfcr); 267351078Speter 267451078Speter dlbl = inb(iobase + com_dlbl); 267551078Speter dlbh = inb(iobase + com_dlbh); 267651078Speter 267751078Speter outb(iobase + com_cfcr, cfcr); 267851078Speter 267951078Speter code = dlbh << 8 | dlbl; 268051078Speter 268151078Speter for ( ; table->sp_speed != -1; table++) 268251078Speter if (table->sp_code == code) 268351078Speter return (table->sp_speed); 268451078Speter 268551078Speter return 0; /* didn't match anything sane */ 268651078Speter} 268751078Speter 268851078Speterstatic void 268951078Spetersiocnopen(sp, iobase, speed) 269051078Speter struct siocnstate *sp; 269151078Speter Port_t iobase; 269251078Speter int speed; 269351078Speter{ 269451078Speter int divisor; 269551078Speter u_char dlbh; 269651078Speter u_char dlbl; 269751078Speter 269851078Speter /* 269951078Speter * Save all the device control registers except the fifo register 270051078Speter * and set our default ones (cs8 -parenb speed=comdefaultrate). 270151078Speter * We can't save the fifo register since it is read-only. 270251078Speter */ 270351078Speter sp->ier = inb(iobase + com_ier); 270451078Speter outb(iobase + com_ier, 0); /* spltty() doesn't stop siointr() */ 270551078Speter siocntxwait(iobase); 270651078Speter sp->cfcr = inb(iobase + com_cfcr); 270751078Speter outb(iobase + com_cfcr, CFCR_DLAB | CFCR_8BITS); 270851078Speter sp->dlbl = inb(iobase + com_dlbl); 270951078Speter sp->dlbh = inb(iobase + com_dlbh); 271051078Speter /* 271151078Speter * Only set the divisor registers if they would change, since on 271251078Speter * some 16550 incompatibles (Startech), setting them clears the 271351078Speter * data input register. This also reduces the effects of the 271451078Speter * UMC8669F bug. 271551078Speter */ 271651078Speter divisor = ttspeedtab(speed, comspeedtab); 271751078Speter dlbl = divisor & 0xFF; 271851078Speter if (sp->dlbl != dlbl) 271951078Speter outb(iobase + com_dlbl, dlbl); 272051078Speter dlbh = (u_int) divisor >> 8; 272151078Speter if (sp->dlbh != dlbh) 272251078Speter outb(iobase + com_dlbh, dlbh); 272351078Speter outb(iobase + com_cfcr, CFCR_8BITS); 272451078Speter sp->mcr = inb(iobase + com_mcr); 272551078Speter /* 272651078Speter * We don't want interrupts, but must be careful not to "disable" 272751078Speter * them by clearing the MCR_IENABLE bit, since that might cause 272851078Speter * an interrupt by floating the IRQ line. 272951078Speter */ 273051078Speter outb(iobase + com_mcr, (sp->mcr & MCR_IENABLE) | MCR_DTR | MCR_RTS); 273151078Speter} 273251078Speter 273351078Speterstatic void 273451078Spetersiocnclose(sp, iobase) 273551078Speter struct siocnstate *sp; 273651078Speter Port_t iobase; 273751078Speter{ 273851078Speter /* 273951078Speter * Restore the device control registers. 274051078Speter */ 274151078Speter siocntxwait(iobase); 274251078Speter outb(iobase + com_cfcr, CFCR_DLAB | CFCR_8BITS); 274351078Speter if (sp->dlbl != inb(iobase + com_dlbl)) 274451078Speter outb(iobase + com_dlbl, sp->dlbl); 274551078Speter if (sp->dlbh != inb(iobase + com_dlbh)) 274651078Speter outb(iobase + com_dlbh, sp->dlbh); 274751078Speter outb(iobase + com_cfcr, sp->cfcr); 274851078Speter /* 274951078Speter * XXX damp oscillations of MCR_DTR and MCR_RTS by not restoring them. 275051078Speter */ 275151078Speter outb(iobase + com_mcr, sp->mcr | MCR_DTR | MCR_RTS); 275251078Speter outb(iobase + com_ier, sp->ier); 275351078Speter} 275451078Speter 275551078Speterstatic void 275651078Spetersiocnprobe(cp) 275751078Speter struct consdev *cp; 275851078Speter{ 275951078Speter speed_t boot_speed; 276051078Speter u_char cfcr; 276151078Speter int s, unit; 276251078Speter struct siocnstate sp; 276351078Speter 276451078Speter /* 276551078Speter * Find our first enabled console, if any. If it is a high-level 276651078Speter * console device, then initialize it and return successfully. 276751078Speter * If it is a low-level console device, then initialize it and 276851078Speter * return unsuccessfully. It must be initialized in both cases 276951078Speter * for early use by console drivers and debuggers. Initializing 277051078Speter * the hardware is not necessary in all cases, since the i/o 277151078Speter * routines initialize it on the fly, but it is necessary if 277251078Speter * input might arrive while the hardware is switched back to an 277351078Speter * uninitialized state. We can't handle multiple console devices 277451078Speter * yet because our low-level routines don't take a device arg. 277551078Speter * We trust the user to set the console flags properly so that we 277651078Speter * don't need to probe. 277751078Speter */ 277851078Speter cp->cn_pri = CN_DEAD; 277951078Speter 278051078Speter for (unit = 0; unit < 16; unit++) { /* XXX need to know how many */ 278151078Speter int flags; 278251078Speter int disabled; 278351078Speter if (resource_int_value("sio", unit, "disabled", &disabled) == 0) { 278451078Speter if (disabled) 278551078Speter continue; 278651078Speter } 278751078Speter if (resource_int_value("sio", unit, "flags", &flags)) 278851078Speter continue; 278951078Speter if (COM_CONSOLE(flags) || COM_DEBUGGER(flags)) { 279051078Speter int port; 279151078Speter Port_t iobase; 279251078Speter 279351078Speter if (resource_int_value("sio", unit, "port", &port)) 279451078Speter continue; 279551078Speter iobase = port; 279651078Speter s = spltty(); 279751078Speter if (boothowto & RB_SERIAL) { 279851078Speter boot_speed = siocngetspeed(iobase, comspeedtab); 279951078Speter if (boot_speed) 280051078Speter comdefaultrate = boot_speed; 280151078Speter } 280251078Speter 280351078Speter /* 280451078Speter * Initialize the divisor latch. We can't rely on 280551078Speter * siocnopen() to do this the first time, since it 280651078Speter * avoids writing to the latch if the latch appears 280751078Speter * to have the correct value. Also, if we didn't 280851078Speter * just read the speed from the hardware, then we 280951078Speter * need to set the speed in hardware so that 281051078Speter * switching it later is null. 281151078Speter */ 281251078Speter cfcr = inb(iobase + com_cfcr); 281351078Speter outb(iobase + com_cfcr, CFCR_DLAB | cfcr); 281451078Speter outb(iobase + com_dlbl, 281551078Speter COMBRD(comdefaultrate) & 0xff); 281651078Speter outb(iobase + com_dlbh, 281751078Speter (u_int) COMBRD(comdefaultrate) >> 8); 281851078Speter outb(iobase + com_cfcr, cfcr); 281951078Speter 282051078Speter siocnopen(&sp, iobase, comdefaultrate); 282151078Speter 282251078Speter splx(s); 282351078Speter if (COM_CONSOLE(flags) && !COM_LLCONSOLE(flags)) { 282451078Speter cp->cn_dev = makedev(CDEV_MAJOR, unit); 282551078Speter cp->cn_pri = COM_FORCECONSOLE(flags) 282651078Speter || boothowto & RB_SERIAL 282751078Speter ? CN_REMOTE : CN_NORMAL; 282851078Speter siocniobase = iobase; 282951078Speter siocnunit = unit; 283051078Speter } 283151078Speter if (COM_DEBUGGER(flags)) { 283251078Speter printf("sio%d: gdb debugging port\n", unit); 283351078Speter siogdbiobase = iobase; 283451078Speter siogdbunit = unit; 283551078Speter#if DDB > 0 283651078Speter gdbdev = makedev(CDEV_MAJOR, unit); 283751078Speter gdb_getc = siocngetc; 283851078Speter gdb_putc = siocnputc; 283951078Speter#endif 284051078Speter } 284151078Speter } 284251078Speter } 284351078Speter#ifdef __i386__ 284451078Speter#if DDB > 0 284551078Speter /* 284651078Speter * XXX Ugly Compatability. 284751078Speter * If no gdb port has been specified, set it to be the console 284851078Speter * as some configuration files don't specify the gdb port. 284951078Speter */ 285051078Speter if (gdbdev == NODEV && (boothowto & RB_GDB)) { 285151078Speter printf("Warning: no GDB port specified. Defaulting to sio%d.\n", 285251078Speter siocnunit); 285351078Speter printf("Set flag 0x80 on desired GDB port in your\n"); 285451078Speter printf("configuration file (currently sio only).\n"); 285551078Speter siogdbiobase = siocniobase; 285651078Speter siogdbunit = siocnunit; 285751078Speter gdbdev = makedev(CDEV_MAJOR, siocnunit); 285851078Speter gdb_getc = siocngetc; 285951078Speter gdb_putc = siocnputc; 286051078Speter } 286151078Speter#endif 286251078Speter#endif 286351078Speter} 286451078Speter 286551078Speter#ifdef __alpha__ 286651078Speter 286751078SpeterCONS_DRIVER(sio, NULL, NULL, NULL, siocngetc, siocncheckc, siocnputc); 286851078Speter 286951078Speterint 287051078Spetersiocnattach(port, speed) 287151078Speter int port; 287251078Speter int speed; 287351078Speter{ 287451078Speter int s; 287551078Speter u_char cfcr; 287651078Speter struct siocnstate sp; 287751078Speter 287851078Speter siocniobase = port; 287951078Speter comdefaultrate = speed; 288051078Speter sio_consdev.cn_pri = CN_NORMAL; 288151078Speter sio_consdev.cn_dev = makedev(CDEV_MAJOR, 0); 288251078Speter 288351078Speter s = spltty(); 288451078Speter 288551078Speter /* 288651078Speter * Initialize the divisor latch. We can't rely on 288751078Speter * siocnopen() to do this the first time, since it 288851078Speter * avoids writing to the latch if the latch appears 288951078Speter * to have the correct value. Also, if we didn't 289051078Speter * just read the speed from the hardware, then we 289151078Speter * need to set the speed in hardware so that 289251078Speter * switching it later is null. 289351078Speter */ 289451078Speter cfcr = inb(siocniobase + com_cfcr); 289551078Speter outb(siocniobase + com_cfcr, CFCR_DLAB | cfcr); 289651078Speter outb(siocniobase + com_dlbl, 289751078Speter COMBRD(comdefaultrate) & 0xff); 289851078Speter outb(siocniobase + com_dlbh, 289951078Speter (u_int) COMBRD(comdefaultrate) >> 8); 290051078Speter outb(siocniobase + com_cfcr, cfcr); 290151078Speter 290251078Speter siocnopen(&sp, siocniobase, comdefaultrate); 290351078Speter splx(s); 290451078Speter 290551078Speter cn_tab = &sio_consdev; 290651078Speter return 0; 290751078Speter} 290851078Speter 290951078Speterint 291051078Spetersiogdbattach(port, speed) 291151078Speter int port; 291251078Speter int speed; 291351078Speter{ 291451078Speter int s; 291551078Speter u_char cfcr; 291651078Speter struct siocnstate sp; 291751078Speter 291851078Speter siogdbiobase = port; 291951078Speter gdbdefaultrate = speed; 292051078Speter 292151078Speter s = spltty(); 292251078Speter 292351078Speter /* 292451078Speter * Initialize the divisor latch. We can't rely on 292551078Speter * siocnopen() to do this the first time, since it 292651078Speter * avoids writing to the latch if the latch appears 292751078Speter * to have the correct value. Also, if we didn't 292851078Speter * just read the speed from the hardware, then we 292951078Speter * need to set the speed in hardware so that 293051078Speter * switching it later is null. 293151078Speter */ 293251078Speter cfcr = inb(siogdbiobase + com_cfcr); 293351078Speter outb(siogdbiobase + com_cfcr, CFCR_DLAB | cfcr); 293451078Speter outb(siogdbiobase + com_dlbl, 293551078Speter COMBRD(gdbdefaultrate) & 0xff); 293651078Speter outb(siogdbiobase + com_dlbh, 293751078Speter (u_int) COMBRD(gdbdefaultrate) >> 8); 293851078Speter outb(siogdbiobase + com_cfcr, cfcr); 293951078Speter 294051078Speter siocnopen(&sp, siogdbiobase, gdbdefaultrate); 294151078Speter splx(s); 294251078Speter 294351078Speter return 0; 294451078Speter} 294551078Speter 294651078Speter#endif 294751078Speter 294851078Speterstatic void 294951078Spetersiocninit(cp) 295051078Speter struct consdev *cp; 295151078Speter{ 295251078Speter comconsole = DEV_TO_UNIT(cp->cn_dev); 295351078Speter} 295451078Speter 295551078Speterstatic int 295651078Spetersiocncheckc(dev) 295751078Speter dev_t dev; 295851078Speter{ 295951078Speter int c; 296051078Speter Port_t iobase; 296151078Speter int s; 296251078Speter struct siocnstate sp; 296351078Speter 296451078Speter if (minor(dev) == siogdbunit) 296551078Speter iobase = siogdbiobase; 296651078Speter else 296751078Speter iobase = siocniobase; 296851078Speter s = spltty(); 296951078Speter siocnopen(&sp, iobase, comdefaultrate); 297051078Speter if (inb(iobase + com_lsr) & LSR_RXRDY) 297151078Speter c = inb(iobase + com_data); 297251078Speter else 297351078Speter c = -1; 297451078Speter siocnclose(&sp, iobase); 297551078Speter splx(s); 297651078Speter return (c); 297751078Speter} 297851078Speter 297951078Speter 298051078Speterint 298151078Spetersiocngetc(dev) 298251078Speter dev_t dev; 298351078Speter{ 298451078Speter int c; 298551078Speter Port_t iobase; 298651078Speter int s; 298751078Speter struct siocnstate sp; 298851078Speter 298951078Speter if (minor(dev) == siogdbunit) 299051078Speter iobase = siogdbiobase; 299151078Speter else 299251078Speter iobase = siocniobase; 299351078Speter s = spltty(); 299451078Speter siocnopen(&sp, iobase, comdefaultrate); 299551078Speter while (!(inb(iobase + com_lsr) & LSR_RXRDY)) 299651078Speter ; 299751078Speter c = inb(iobase + com_data); 299851078Speter siocnclose(&sp, iobase); 299951078Speter splx(s); 300051078Speter return (c); 300151078Speter} 300251078Speter 300351078Spetervoid 300451078Spetersiocnputc(dev, c) 300551078Speter dev_t dev; 300651078Speter int c; 300751078Speter{ 300851078Speter int s; 300951078Speter struct siocnstate sp; 301051078Speter Port_t iobase; 301151078Speter 301251078Speter if (minor(dev) == siogdbunit) 301351078Speter iobase = siogdbiobase; 301451078Speter else 301551078Speter iobase = siocniobase; 301651078Speter s = spltty(); 301751078Speter siocnopen(&sp, iobase, comdefaultrate); 301851078Speter siocntxwait(iobase); 301951078Speter outb(iobase + com_data, c); 302051078Speter siocnclose(&sp, iobase); 302151078Speter splx(s); 302251078Speter} 302351078Speter 302451078Speter#ifdef __alpha__ 302551078Speterint 302651078Spetersiogdbgetc() 302751078Speter{ 302851078Speter int c; 302951078Speter Port_t iobase; 303051078Speter int s; 303151078Speter struct siocnstate sp; 303251078Speter 303351078Speter iobase = siogdbiobase; 303451078Speter s = spltty(); 303551078Speter siocnopen(&sp, iobase, gdbdefaultrate); 303651078Speter while (!(inb(iobase + com_lsr) & LSR_RXRDY)) 303751078Speter ; 303851078Speter c = inb(iobase + com_data); 303951078Speter siocnclose(&sp, iobase); 304051078Speter splx(s); 304151078Speter return (c); 304251078Speter} 304351078Speter 304451078Spetervoid 304551078Spetersiogdbputc(c) 304651078Speter int c; 304751078Speter{ 304851078Speter int s; 304951078Speter struct siocnstate sp; 305051078Speter 305151078Speter s = spltty(); 305251078Speter siocnopen(&sp, siogdbiobase, gdbdefaultrate); 305351078Speter siocntxwait(siogdbiobase); 305451078Speter outb(siogdbiobase + com_data, c); 305551078Speter siocnclose(&sp, siogdbiobase); 305651078Speter splx(s); 305751078Speter} 305851078Speter#endif 305951078Speter 306051078SpeterDEV_DRIVER_MODULE(sio, isa, sio_driver, sio_devclass, sio_cdevsw, 0, 0); 3061