sio.c revision 54944
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 54944 1999-12-21 09:16:03Z 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" 4254386Simp#include "card.h" 4351078Speter#include "sio.h" 4451078Speter 4551078Speter/* 4651078Speter * Serial driver, based on 386BSD-0.1 com driver. 4751078Speter * Mostly rewritten to use pseudo-DMA. 4851078Speter * Works for National Semiconductor NS8250-NS16550AF UARTs. 4951078Speter * COM driver, based on HP dca driver. 5051078Speter * 5151078Speter * Changes for PC-Card integration: 5251078Speter * - Added PC-Card driver table and handlers 5351078Speter */ 5451078Speter#include <sys/param.h> 5551078Speter#include <sys/systm.h> 5651078Speter#include <sys/reboot.h> 5751078Speter#include <sys/malloc.h> 5851078Speter#include <sys/tty.h> 5951078Speter#include <sys/proc.h> 6051078Speter#include <sys/module.h> 6151078Speter#include <sys/conf.h> 6251078Speter#include <sys/dkstat.h> 6351078Speter#include <sys/fcntl.h> 6451078Speter#include <sys/interrupt.h> 6551078Speter#include <sys/kernel.h> 6651078Speter#include <sys/syslog.h> 6751078Speter#include <sys/sysctl.h> 6851078Speter#include <sys/bus.h> 6951078Speter#include <machine/bus.h> 7051078Speter#include <sys/rman.h> 7151078Speter#include <sys/timepps.h> 7251078Speter 7351078Speter#include <isa/isareg.h> 7451078Speter#include <isa/isavar.h> 7551078Speter#include <machine/lock.h> 7651078Speter 7751078Speter#include <machine/clock.h> 7851078Speter#include <machine/ipl.h> 7951078Speter#ifndef SMP 8051078Speter#include <machine/lock.h> 8151078Speter#endif 8251078Speter#include <machine/resource.h> 8351078Speter 8451078Speter#include <isa/sioreg.h> 8551078Speter 8651078Speter#ifdef COM_ESP 8751078Speter#include <isa/ic/esp.h> 8851078Speter#endif 8951078Speter#include <isa/ic/ns16550.h> 9051078Speter 9151078Speter#ifndef __i386__ 9251078Speter#define disable_intr() 9351078Speter#define enable_intr() 9451078Speter#endif 9551078Speter 9651078Speter#ifdef SMP 9751078Speter#define disable_intr() COM_DISABLE_INTR() 9851078Speter#define enable_intr() COM_ENABLE_INTR() 9951078Speter#endif /* SMP */ 10051078Speter 10151078Speter#define LOTS_OF_EVENTS 64 /* helps separate urgent events from input */ 10251078Speter 10351078Speter#define CALLOUT_MASK 0x80 10451078Speter#define CONTROL_MASK 0x60 10551078Speter#define CONTROL_INIT_STATE 0x20 10651078Speter#define CONTROL_LOCK_STATE 0x40 10751078Speter#define DEV_TO_UNIT(dev) (MINOR_TO_UNIT(minor(dev))) 10851078Speter#define MINOR_MAGIC_MASK (CALLOUT_MASK | CONTROL_MASK) 10951078Speter#define MINOR_TO_UNIT(mynor) ((mynor) & ~MINOR_MAGIC_MASK) 11051078Speter 11151078Speter#ifdef COM_MULTIPORT 11251078Speter/* checks in flags for multiport and which is multiport "master chip" 11351078Speter * for a given card 11451078Speter */ 11551078Speter#define COM_ISMULTIPORT(flags) ((flags) & 0x01) 11651078Speter#define COM_MPMASTER(flags) (((flags) >> 8) & 0x0ff) 11751078Speter#define COM_NOTAST4(flags) ((flags) & 0x04) 11851078Speter#endif /* COM_MULTIPORT */ 11951078Speter 12051078Speter#define COM_CONSOLE(flags) ((flags) & 0x10) 12151078Speter#define COM_FORCECONSOLE(flags) ((flags) & 0x20) 12251078Speter#define COM_LLCONSOLE(flags) ((flags) & 0x40) 12351078Speter#define COM_DEBUGGER(flags) ((flags) & 0x80) 12451078Speter#define COM_LOSESOUTINTS(flags) ((flags) & 0x08) 12551078Speter#define COM_NOFIFO(flags) ((flags) & 0x02) 12651078Speter#define COM_ST16650A(flags) ((flags) & 0x20000) 12751078Speter#define COM_C_NOPROBE (0x40000) 12851078Speter#define COM_NOPROBE(flags) ((flags) & COM_C_NOPROBE) 12951078Speter#define COM_C_IIR_TXRDYBUG (0x80000) 13051078Speter#define COM_IIR_TXRDYBUG(flags) ((flags) & COM_C_IIR_TXRDYBUG) 13151078Speter#define COM_FIFOSIZE(flags) (((flags) & 0xff000000) >> 24) 13251078Speter 13351078Speter#define com_scr 7 /* scratch register for 16450-16550 (R/W) */ 13451078Speter 13551078Speter/* 13651078Speter * com state bits. 13751078Speter * (CS_BUSY | CS_TTGO) and (CS_BUSY | CS_TTGO | CS_ODEVREADY) must be higher 13851078Speter * than the other bits so that they can be tested as a group without masking 13951078Speter * off the low bits. 14051078Speter * 14151078Speter * The following com and tty flags correspond closely: 14251078Speter * CS_BUSY = TS_BUSY (maintained by comstart(), siopoll() and 14353344Speter * comstop()) 14451078Speter * CS_TTGO = ~TS_TTSTOP (maintained by comparam() and comstart()) 14551078Speter * CS_CTS_OFLOW = CCTS_OFLOW (maintained by comparam()) 14651078Speter * CS_RTS_IFLOW = CRTS_IFLOW (maintained by comparam()) 14751078Speter * TS_FLUSH is not used. 14851078Speter * XXX I think TIOCSETA doesn't clear TS_TTSTOP when it clears IXON. 14951078Speter * XXX CS_*FLOW should be CF_*FLOW in com->flags (control flags not state). 15051078Speter */ 15151078Speter#define CS_BUSY 0x80 /* output in progress */ 15251078Speter#define CS_TTGO 0x40 /* output not stopped by XOFF */ 15351078Speter#define CS_ODEVREADY 0x20 /* external device h/w ready (CTS) */ 15451078Speter#define CS_CHECKMSR 1 /* check of MSR scheduled */ 15551078Speter#define CS_CTS_OFLOW 2 /* use CTS output flow control */ 15651078Speter#define CS_DTR_OFF 0x10 /* DTR held off */ 15751078Speter#define CS_ODONE 4 /* output completed */ 15851078Speter#define CS_RTS_IFLOW 8 /* use RTS input flow control */ 15951078Speter#define CSE_BUSYCHECK 1 /* siobusycheck() scheduled */ 16051078Speter 16151078Speterstatic char const * const error_desc[] = { 16251078Speter#define CE_OVERRUN 0 16351078Speter "silo overflow", 16451078Speter#define CE_INTERRUPT_BUF_OVERFLOW 1 16551078Speter "interrupt-level buffer overflow", 16651078Speter#define CE_TTY_BUF_OVERFLOW 2 16751078Speter "tty-level buffer overflow", 16851078Speter}; 16951078Speter 17051078Speter#define CE_NTYPES 3 17151078Speter#define CE_RECORD(com, errnum) (++(com)->delta_error_counts[errnum]) 17251078Speter 17351078Speter/* types. XXX - should be elsewhere */ 17451078Spetertypedef u_int Port_t; /* hardware port */ 17551078Spetertypedef u_char bool_t; /* boolean */ 17651078Speter 17751078Speter/* queue of linear buffers */ 17851078Speterstruct lbq { 17951078Speter u_char *l_head; /* next char to process */ 18051078Speter u_char *l_tail; /* one past the last char to process */ 18151078Speter struct lbq *l_next; /* next in queue */ 18251078Speter bool_t l_queued; /* nonzero if queued */ 18351078Speter}; 18451078Speter 18551078Speter/* com device structure */ 18651078Speterstruct com_s { 18751078Speter u_int flags; /* Copy isa device flags */ 18851078Speter u_char state; /* miscellaneous flag bits */ 18951078Speter bool_t active_out; /* nonzero if the callout device is open */ 19051078Speter u_char cfcr_image; /* copy of value written to CFCR */ 19151078Speter#ifdef COM_ESP 19251078Speter bool_t esp; /* is this unit a hayes esp board? */ 19351078Speter#endif 19451078Speter u_char extra_state; /* more flag bits, separate for order trick */ 19551078Speter u_char fifo_image; /* copy of value written to FIFO */ 19651078Speter bool_t hasfifo; /* nonzero for 16550 UARTs */ 19751078Speter bool_t st16650a; /* Is a Startech 16650A or RTS/CTS compat */ 19851078Speter bool_t loses_outints; /* nonzero if device loses output interrupts */ 19951078Speter u_char mcr_image; /* copy of value written to MCR */ 20051078Speter#ifdef COM_MULTIPORT 20151078Speter bool_t multiport; /* is this unit part of a multiport device? */ 20251078Speter#endif /* COM_MULTIPORT */ 20351078Speter bool_t no_irq; /* nonzero if irq is not attached */ 20451078Speter bool_t gone; /* hardware disappeared */ 20551078Speter bool_t poll; /* nonzero if polling is required */ 20651078Speter bool_t poll_output; /* nonzero if polling for output is required */ 20751078Speter int unit; /* unit number */ 20851078Speter int dtr_wait; /* time to hold DTR down on close (* 1/hz) */ 20951078Speter u_int tx_fifo_size; 21051078Speter u_int wopeners; /* # processes waiting for DCD in open() */ 21151078Speter 21251078Speter /* 21351078Speter * The high level of the driver never reads status registers directly 21451078Speter * because there would be too many side effects to handle conveniently. 21551078Speter * Instead, it reads copies of the registers stored here by the 21651078Speter * interrupt handler. 21751078Speter */ 21851078Speter u_char last_modem_status; /* last MSR read by intr handler */ 21951078Speter u_char prev_modem_status; /* last MSR handled by high level */ 22051078Speter 22151078Speter u_char hotchar; /* ldisc-specific char to be handled ASAP */ 22251078Speter u_char *ibuf; /* start of input buffer */ 22351078Speter u_char *ibufend; /* end of input buffer */ 22451078Speter u_char *ibufold; /* old input buffer, to be freed */ 22551078Speter u_char *ihighwater; /* threshold in input buffer */ 22651078Speter u_char *iptr; /* next free spot in input buffer */ 22751078Speter int ibufsize; /* size of ibuf (not include error bytes) */ 22851078Speter int ierroff; /* offset of error bytes in ibuf */ 22951078Speter 23051078Speter struct lbq obufq; /* head of queue of output buffers */ 23151078Speter struct lbq obufs[2]; /* output buffers */ 23251078Speter 23351078Speter Port_t data_port; /* i/o ports */ 23451078Speter#ifdef COM_ESP 23551078Speter Port_t esp_port; 23651078Speter#endif 23751078Speter Port_t int_id_port; 23851078Speter Port_t iobase; 23951078Speter Port_t modem_ctl_port; 24051078Speter Port_t line_status_port; 24151078Speter Port_t modem_status_port; 24251078Speter Port_t intr_ctl_port; /* Ports of IIR register */ 24351078Speter 24451078Speter struct tty *tp; /* cross reference */ 24551078Speter 24651078Speter /* Initial state. */ 24751078Speter struct termios it_in; /* should be in struct tty */ 24851078Speter struct termios it_out; 24951078Speter 25051078Speter /* Lock state. */ 25151078Speter struct termios lt_in; /* should be in struct tty */ 25251078Speter struct termios lt_out; 25351078Speter 25451078Speter bool_t do_timestamp; 25551078Speter bool_t do_dcd_timestamp; 25651078Speter struct timeval timestamp; 25751078Speter struct timeval dcd_timestamp; 25851078Speter struct pps_state pps; 25951078Speter 26051078Speter u_long bytes_in; /* statistics */ 26151078Speter u_long bytes_out; 26251078Speter u_int delta_error_counts[CE_NTYPES]; 26351078Speter u_long error_counts[CE_NTYPES]; 26451078Speter 26551078Speter struct resource *irqres; 26651078Speter struct resource *ioportres; 26754386Simp void *cookie; 26851078Speter 26951078Speter /* 27051078Speter * Data area for output buffers. Someday we should build the output 27151078Speter * buffer queue without copying data. 27251078Speter */ 27351078Speter u_char obuf1[256]; 27451078Speter u_char obuf2[256]; 27551078Speter}; 27651078Speter 27751078Speter#ifdef COM_ESP 27851078Speterstatic int espattach __P((struct com_s *com, Port_t esp_port)); 27951078Speter#endif 28051078Speterstatic int sioattach __P((device_t dev)); 28152471Simpstatic int sio_isa_attach __P((device_t dev)); 28251078Speter 28351078Speterstatic timeout_t siobusycheck; 28451078Speterstatic timeout_t siodtrwakeup; 28551078Speterstatic void comhardclose __P((struct com_s *com)); 28651078Speterstatic void sioinput __P((struct com_s *com)); 28751078Speterstatic void siointr1 __P((struct com_s *com)); 28851078Speterstatic void siointr __P((void *arg)); 28951078Speterstatic int commctl __P((struct com_s *com, int bits, int how)); 29051078Speterstatic int comparam __P((struct tty *tp, struct termios *t)); 29151078Speterstatic swihand_t siopoll; 29251078Speterstatic int sioprobe __P((device_t dev)); 29352471Simpstatic int sio_isa_probe __P((device_t dev)); 29451078Speterstatic void siosettimeout __P((void)); 29551078Speterstatic int siosetwater __P((struct com_s *com, speed_t speed)); 29651078Speterstatic void comstart __P((struct tty *tp)); 29751654Sphkstatic void comstop __P((struct tty *tp, int rw)); 29851078Speterstatic timeout_t comwakeup; 29951078Speterstatic void disc_optim __P((struct tty *tp, struct termios *t, 30051078Speter struct com_s *com)); 30151078Speter 30252471Simp#if NCARD > 0 30352471Simpstatic int sio_pccard_attach __P((device_t dev)); 30454386Simpstatic int sio_pccard_detach __P((device_t dev)); 30552471Simpstatic int sio_pccard_probe __P((device_t dev)); 30652471Simp#endif /* NCARD > 0 */ 30751078Speter 30851078Speterstatic char driver_name[] = "sio"; 30951078Speter 31051078Speter/* table and macro for fast conversion from a unit number to its com struct */ 31151078Speterstatic devclass_t sio_devclass; 31251078Speter#define com_addr(unit) ((struct com_s *) \ 31351078Speter devclass_get_softc(sio_devclass, unit)) 31451078Speter 31552471Simpstatic device_method_t sio_isa_methods[] = { 31651078Speter /* Device interface */ 31752471Simp DEVMETHOD(device_probe, sio_isa_probe), 31852471Simp DEVMETHOD(device_attach, sio_isa_attach), 31951078Speter 32051078Speter { 0, 0 } 32151078Speter}; 32251078Speter 32352471Simpstatic driver_t sio_isa_driver = { 32451078Speter driver_name, 32552471Simp sio_isa_methods, 32651078Speter sizeof(struct com_s), 32751078Speter}; 32851078Speter 32952471Simp#if NCARD > 0 33052471Simpstatic device_method_t sio_pccard_methods[] = { 33152471Simp /* Device interface */ 33252471Simp DEVMETHOD(device_probe, sio_pccard_probe), 33352471Simp DEVMETHOD(device_attach, sio_pccard_attach), 33452471Simp DEVMETHOD(device_detach, sio_pccard_detach), 33552471Simp 33652471Simp { 0, 0 } 33752471Simp}; 33852471Simp 33952471Simpstatic driver_t sio_pccard_driver = { 34052471Simp driver_name, 34152471Simp sio_pccard_methods, 34252471Simp sizeof(struct com_s), 34352471Simp}; 34452471Simp#endif (NCARD > 0) 34552471Simp 34651078Speterstatic d_open_t sioopen; 34751078Speterstatic d_close_t sioclose; 34851078Speterstatic d_read_t sioread; 34951078Speterstatic d_write_t siowrite; 35051078Speterstatic d_ioctl_t sioioctl; 35151078Speter 35251078Speter#define CDEV_MAJOR 28 35351078Speterstatic struct cdevsw sio_cdevsw = { 35451078Speter /* open */ sioopen, 35551078Speter /* close */ sioclose, 35651078Speter /* read */ sioread, 35751078Speter /* write */ siowrite, 35851078Speter /* ioctl */ sioioctl, 35951654Sphk /* poll */ ttypoll, 36051078Speter /* mmap */ nommap, 36151078Speter /* strategy */ nostrategy, 36251078Speter /* name */ driver_name, 36351078Speter /* maj */ CDEV_MAJOR, 36451078Speter /* dump */ nodump, 36551078Speter /* psize */ nopsize, 36651078Speter /* flags */ D_TTY, 36751078Speter /* bmaj */ -1 36851078Speter}; 36951078Speter 37051078Speterint comconsole = -1; 37151078Speterstatic volatile speed_t comdefaultrate = CONSPEED; 37251078Speter#ifdef __alpha__ 37351078Speterstatic volatile speed_t gdbdefaultrate = CONSPEED; 37451078Speter#endif 37551078Speterstatic u_int com_events; /* input chars + weighted output completions */ 37651078Speterstatic Port_t siocniobase; 37751078Speterstatic int siocnunit; 37851078Speterstatic Port_t siogdbiobase; 37951078Speterstatic int siogdbunit = -1; 38051078Speterstatic bool_t sio_registered; 38151078Speterstatic int sio_timeout; 38251078Speterstatic int sio_timeouts_until_log; 38351078Speterstatic struct callout_handle sio_timeout_handle 38451078Speter = CALLOUT_HANDLE_INITIALIZER(&sio_timeout_handle); 38553344Speterstatic int sio_numunits; 38651078Speter 38751078Speterstatic struct speedtab comspeedtab[] = { 38851078Speter { 0, 0 }, 38951078Speter { 50, COMBRD(50) }, 39051078Speter { 75, COMBRD(75) }, 39151078Speter { 110, COMBRD(110) }, 39251078Speter { 134, COMBRD(134) }, 39351078Speter { 150, COMBRD(150) }, 39451078Speter { 200, COMBRD(200) }, 39551078Speter { 300, COMBRD(300) }, 39651078Speter { 600, COMBRD(600) }, 39751078Speter { 1200, COMBRD(1200) }, 39851078Speter { 1800, COMBRD(1800) }, 39951078Speter { 2400, COMBRD(2400) }, 40051078Speter { 4800, COMBRD(4800) }, 40151078Speter { 9600, COMBRD(9600) }, 40251078Speter { 19200, COMBRD(19200) }, 40351078Speter { 38400, COMBRD(38400) }, 40451078Speter { 57600, COMBRD(57600) }, 40551078Speter { 115200, COMBRD(115200) }, 40651078Speter { -1, -1 } 40751078Speter}; 40851078Speter 40951078Speter#ifdef COM_ESP 41051078Speter/* XXX configure this properly. */ 41151078Speterstatic Port_t likely_com_ports[] = { 0x3f8, 0x2f8, 0x3e8, 0x2e8, }; 41251078Speterstatic Port_t likely_esp_ports[] = { 0x140, 0x180, 0x280, 0 }; 41351078Speter#endif 41451078Speter 41551078Speter/* 41651078Speter * handle sysctl read/write requests for console speed 41751078Speter * 41851078Speter * In addition to setting comdefaultrate for I/O through /dev/console, 41951078Speter * also set the initial and lock values for the /dev/ttyXX device 42051078Speter * if there is one associated with the console. Finally, if the /dev/tty 42151078Speter * device has already been open, change the speed on the open running port 42251078Speter * itself. 42351078Speter */ 42451078Speter 42551078Speterstatic int 42651078Spetersysctl_machdep_comdefaultrate SYSCTL_HANDLER_ARGS 42751078Speter{ 42851078Speter int error, s; 42951078Speter speed_t newspeed; 43051078Speter struct com_s *com; 43151078Speter struct tty *tp; 43251078Speter 43351078Speter newspeed = comdefaultrate; 43451078Speter 43551078Speter error = sysctl_handle_opaque(oidp, &newspeed, sizeof newspeed, req); 43651078Speter if (error || !req->newptr) 43751078Speter return (error); 43851078Speter 43951078Speter comdefaultrate = newspeed; 44051078Speter 44151078Speter if (comconsole < 0) /* serial console not selected? */ 44251078Speter return (0); 44351078Speter 44451078Speter com = com_addr(comconsole); 44551078Speter if (!com) 44651078Speter return (ENXIO); 44751078Speter 44851078Speter /* 44951078Speter * set the initial and lock rates for /dev/ttydXX and /dev/cuaXX 45051078Speter * (note, the lock rates really are boolean -- if non-zero, disallow 45151078Speter * speed changes) 45251078Speter */ 45351078Speter com->it_in.c_ispeed = com->it_in.c_ospeed = 45451078Speter com->lt_in.c_ispeed = com->lt_in.c_ospeed = 45551078Speter com->it_out.c_ispeed = com->it_out.c_ospeed = 45651078Speter com->lt_out.c_ispeed = com->lt_out.c_ospeed = comdefaultrate; 45751078Speter 45851078Speter /* 45951078Speter * if we're open, change the running rate too 46051078Speter */ 46151078Speter tp = com->tp; 46251078Speter if (tp && (tp->t_state & TS_ISOPEN)) { 46351078Speter tp->t_termios.c_ispeed = 46451078Speter tp->t_termios.c_ospeed = comdefaultrate; 46551078Speter s = spltty(); 46651078Speter error = comparam(tp, &tp->t_termios); 46751078Speter splx(s); 46851078Speter } 46951078Speter return error; 47051078Speter} 47151078Speter 47251078SpeterSYSCTL_PROC(_machdep, OID_AUTO, conspeed, CTLTYPE_INT | CTLFLAG_RW, 47351078Speter 0, 0, sysctl_machdep_comdefaultrate, "I", ""); 47451078Speter 47553344Speter#define SET_FLAG(dev, bit) device_set_flags(dev, device_get_flags(dev) | (bit)) 47653344Speter#define CLR_FLAG(dev, bit) device_set_flags(dev, device_get_flags(dev) & ~(bit)) 47753344Speter 47851078Speter#if NCARD > 0 47952471Simpstatic int 48052471Simpsio_pccard_probe(dev) 48152471Simp device_t dev; 48251078Speter{ 48354386Simp /* Do not probe IRQ - pccard doesn't turn on the interrupt line */ 48454386Simp /* until bus_setup_intr */ 48553344Speter SET_FLAG(dev, COM_C_NOPROBE); 48653344Speter 48752471Simp return (sioprobe(dev)); 48852471Simp} 48951078Speter 49052471Simpstatic int 49152471Simpsio_pccard_attach(dev) 49252471Simp device_t dev; 49352471Simp{ 49452471Simp return (sioattach(dev)); 49551078Speter} 49651078Speter 49751078Speter/* 49852471Simp * sio_detach - unload the driver and clear the table. 49951078Speter * XXX TODO: 50051078Speter * This is usually called when the card is ejected, but 50151078Speter * can be caused by a modunload of a controller driver. 50251078Speter * The idea is to reset the driver's view of the device 50351078Speter * and ensure that any driver entry points such as 50451078Speter * read and write do not hang. 50551078Speter */ 50653978Simpstatic int 50752471Simpsio_pccard_detach(dev) 50852471Simp device_t dev; 50951078Speter{ 51051078Speter struct com_s *com; 51151078Speter 51252471Simp com = (struct com_s *) device_get_softc(dev); 51351078Speter if (!com) { 51452471Simp device_printf(dev, "NULL com in siounload\n"); 51554386Simp return (0); 51651078Speter } 51751078Speter if (!com->iobase) { 51852471Simp device_printf(dev, "already unloaded!\n"); 51954386Simp return (0); 52051078Speter } 52154386Simp com->gone = 1; 52254386Simp if (com->irqres) { 52354386Simp bus_teardown_intr(dev, com->irqres, com->cookie); 52454386Simp bus_release_resource(dev, SYS_RES_IRQ, 0, com->irqres); 52554386Simp } 52654386Simp if (com->ioportres) 52754386Simp bus_release_resource(dev, SYS_RES_IOPORT, 0, com->ioportres); 52851078Speter if (com->tp && (com->tp->t_state & TS_ISOPEN)) { 52952471Simp device_printf(dev, "unload\n"); 53051078Speter com->tp->t_gen++; 53151078Speter ttyclose(com->tp); 53251078Speter ttwakeup(com->tp); 53351078Speter ttwwakeup(com->tp); 53454386Simp device_printf(dev, "Was busy, so crash likely\n"); 53551078Speter } else { 53651078Speter if (com->ibuf != NULL) 53751078Speter free(com->ibuf, M_DEVBUF); 53854386Simp device_printf(dev, "unload, gone\n"); 53951078Speter } 54053978Simp return (0); 54151078Speter} 54251078Speter#endif /* NCARD > 0 */ 54351078Speter 54451078Speter 54551078Speterstatic struct isa_pnp_id sio_ids[] = { 54651078Speter {0x0005d041, "Standard PC COM port"}, /* PNP0500 */ 54751078Speter {0x0105d041, "16550A-compatible COM port"}, /* PNP0501 */ 54851078Speter {0x0205d041, "Multiport serial device (non-intelligent 16550)"}, /* PNP0502 */ 54951078Speter {0x1005d041, "Generic IRDA-compatible device"}, /* PNP0510 */ 55051078Speter {0x1105d041, "Generic IRDA-compatible device"}, /* PNP0511 */ 55154944Speter /* Devices that do not have a compatid */ 55254944Speter {0x7602a904, NULL}, /* AEI0276 - 56K v.90 Fax Modem (LKT) */ 55354944Speter {0x00007905, NULL}, /* AKY0000 - 56K Plug&Play Modem */ 55454944Speter {0x01405407, NULL}, /* AZT4001 - AZT3000 PnP SOUND DEVICE, MODEM */ 55554944Speter {0x56039008, NULL}, /* BDP0356 - Best Data 56x2 */ 55654944Speter {0x36339008, NULL}, /* BDP3336 - Best Data Prods. 336F */ 55754944Speter {0x0014490a, NULL}, /* BRI1400 - Boca 33.6 PnP */ 55854944Speter {0x0015490a, NULL}, /* BRI1500 - Internal Fax Data */ 55954944Speter {0x0034490a, NULL}, /* BRI3400 - Internal ACF Modem */ 56054944Speter {0x00b4490a, NULL}, /* BRIB400 - Boca 56k PnP */ 56154944Speter {0x0030320d, NULL}, /* CIR3000 - Cirrus Logic V43 */ 56254944Speter {0x1200c31e, NULL}, /* GVC0012 - VF1128HV-R9 (win modem?) */ 56354944Speter {0x0303c31e, NULL}, /* GVC0303 - MaxTech 33.6 PnP D/F/V */ 56454944Speter {0x0050c31e, NULL}, /* GVC5000 - some GVC modem */ 56554944Speter {0x3800f91e, NULL}, /* GWY0038 - Telepath with v.90 */ 56654944Speter {0x9062f91e, NULL}, /* GWY6290 - Telepath with x2 Technology */ 56754944Speter {0x0000f435, NULL}, /* MOT0000 - Motorola ModemSURFR 33.6 Intern */ 56854944Speter {0x5015f435, NULL}, /* MOT1550 - Motorola ModemSURFR 56K Modem */ 56954944Speter {0xf015f435, NULL}, /* MOT15F0 - Motorola VoiceSURFR 56K Modem */ 57054944Speter {0x6045f435, NULL}, /* MOT4560 - Motorola ? */ 57154944Speter {0x61e7a338, NULL}, /* NECE761 - 33.6Modem */ 57254944Speter {0x39804f3f, NULL}, /* OZO8039 - Zoom 56k flex */ 57354944Speter {0x1000eb49, NULL}, /* ROK0010 - Rockwell ? */ 57454944Speter {0x5002734a, NULL}, /* RSS0250 - 5614Jx3(G) Internal Modem */ 57554944Speter {0xc100ad4d, NULL}, /* SMM00C1 - Leopard 56k PnP */ 57654944Speter {0x1013b04e, NULL}, /* SUP1310 - SupraExpress 336i PnP */ 57754944Speter {0x8013b04e, NULL}, /* SUP1380 - SupraExpress 288i PnP Voice */ 57854944Speter {0x8113b04e, NULL}, /* SUP1381 - SupraExpress 336i PnP Voice */ 57954944Speter {0x5016b04e, NULL}, /* SUP1650 - Supra 336i Sp Intl */ 58054944Speter {0x7420b04e, NULL}, /* SUP2070 - Supra ? */ 58154944Speter {0x8020b04e, NULL}, /* SUP2080 - Supra ? */ 58254944Speter {0x8420b04e, NULL}, /* SUP2084 - SupraExpress 56i PnP */ 58354944Speter {0x8024b04e, NULL}, /* SUP2480 - Supra ? */ 58454944Speter {0x01007256, NULL}, /* USR0001 - U.S. Robotics Inc., Sportster W */ 58554944Speter {0x02007256, NULL}, /* USR0002 - U.S. Robotics Inc. Sportster 33. */ 58654944Speter {0x04007256, NULL}, /* USR0004 - USR Sportster 14.4k */ 58754944Speter {0x06007256, NULL}, /* USR0006 - USR Sportster 33.6k */ 58854944Speter {0x01017256, NULL}, /* USR0101 - USR ? */ 58954944Speter {0x30207256, NULL}, /* USR2030 - U.S.Robotics Inc. Sportster 560 */ 59054944Speter {0x50207256, NULL}, /* USR2050 - U.S.Robotics Inc. Sportster 33. */ 59154944Speter {0x70207256, NULL}, /* USR2070 - U.S.Robotics Inc. Sportster 560 */ 59254944Speter {0x30307256, NULL}, /* USR3030 - U.S. Robotics 56K FAX INT */ 59354944Speter {0x31307256, NULL}, /* USR3031 - U.S. Robotics 56K FAX INT */ 59454944Speter {0x70307256, NULL}, /* USR3070 - U.S. Robotics 56K Voice INT */ 59554944Speter {0x90917256, NULL}, /* USR9190 - USR 56k Voice INT */ 59654944Speter {0x0300695c, NULL}, /* WCI0003 - Fax/Voice/Modem/Speakphone/Asvd */ 59754944Speter {0x61f7896a, NULL}, /* ZTIF761 - Zoom ComStar 33.6 */ 59851078Speter {0} 59951078Speter}; 60051078Speter 60151078Speterstatic int 60252471Simpsio_isa_probe(dev) 60352471Simp device_t dev; 60452471Simp{ 60552471Simp /* Check isapnp ids */ 60652471Simp if (ISA_PNP_PROBE(device_get_parent(dev), dev, sio_ids) == ENXIO) 60752471Simp return (ENXIO); 60852471Simp return (sioprobe(dev)); 60952471Simp} 61052471Simp 61152471Simpstatic int 61251078Spetersioprobe(dev) 61351078Speter device_t dev; 61451078Speter{ 61553344Speter#if 0 61651078Speter static bool_t already_init; 61753344Speter device_t xdev; 61853344Speter#endif 61951078Speter bool_t failures[10]; 62051078Speter int fn; 62151078Speter device_t idev; 62251078Speter Port_t iobase; 62351078Speter intrmask_t irqmap[4]; 62451078Speter intrmask_t irqs; 62551078Speter u_char mcr_image; 62651078Speter int result; 62754206Speter u_long xirq; 62851088Speter u_int flags = device_get_flags(dev); 62951078Speter int rid; 63051078Speter struct resource *port; 63151078Speter 63251078Speter rid = 0; 63351078Speter port = bus_alloc_resource(dev, SYS_RES_IOPORT, &rid, 63451078Speter 0, ~0, IO_COMSIZE, RF_ACTIVE); 63551078Speter if (!port) 63651078Speter return ENXIO; 63751078Speter 63853344Speter#if 0 63953344Speter /* 64053344Speter * XXX this is broken - when we are first called, there are no 64153344Speter * previously configured IO ports. We could hard code 64253344Speter * 0x3f8, 0x2f8, 0x3e8, 0x2e8 etc but that's probably worse. 64353344Speter * This code has been doing nothing since the conversion since 64453344Speter * "count" is zero the first time around. 64553344Speter */ 64651078Speter if (!already_init) { 64751078Speter /* 64851078Speter * Turn off MCR_IENABLE for all likely serial ports. An unused 64951078Speter * port with its MCR_IENABLE gate open will inhibit interrupts 65051078Speter * from any used port that shares the interrupt vector. 65151078Speter * XXX the gate enable is elsewhere for some multiports. 65251078Speter */ 65351078Speter device_t *devs; 65453344Speter int count, i, xioport; 65551078Speter 65651078Speter devclass_get_devices(sio_devclass, &devs, &count); 65751078Speter for (i = 0; i < count; i++) { 65851078Speter xdev = devs[i]; 65954194Speter if (device_is_enabled(xdev) && 66054194Speter bus_get_resource(xdev, SYS_RES_IOPORT, 0, &xioport, 66154194Speter NULL) == 0) 66253344Speter outb(xioport + com_mcr, 0); 66351078Speter } 66451078Speter free(devs, M_TEMP); 66551078Speter already_init = TRUE; 66651078Speter } 66753344Speter#endif 66851078Speter 66951078Speter if (COM_LLCONSOLE(flags)) { 67051078Speter printf("sio%d: reserved for low-level i/o\n", 67151078Speter device_get_unit(dev)); 67251078Speter return (ENXIO); 67351078Speter } 67451078Speter 67551078Speter /* 67651078Speter * If the device is on a multiport card and has an AST/4 67751078Speter * compatible interrupt control register, initialize this 67851078Speter * register and prepare to leave MCR_IENABLE clear in the mcr. 67951078Speter * Otherwise, prepare to set MCR_IENABLE in the mcr. 68051078Speter * Point idev to the device struct giving the correct id_irq. 68151078Speter * This is the struct for the master device if there is one. 68251078Speter */ 68351078Speter idev = dev; 68451078Speter mcr_image = MCR_IENABLE; 68551078Speter#ifdef COM_MULTIPORT 68653344Speter if (COM_ISMULTIPORT(flags) && !COM_NOTAST4(flags)) { 68754206Speter Port_t xiobase; 68854206Speter u_long io; 68954206Speter 69051078Speter idev = devclass_get_device(sio_devclass, COM_MPMASTER(flags)); 69151078Speter if (idev == NULL) { 69251078Speter printf("sio%d: master device %d not configured\n", 69351078Speter device_get_unit(dev), COM_MPMASTER(flags)); 69451078Speter idev = dev; 69551078Speter } 69654206Speter if (bus_get_resource(idev, SYS_RES_IOPORT, 0, &io, NULL) == 0) { 69754206Speter xiobase = io; 69854194Speter if (bus_get_resource(idev, SYS_RES_IRQ, 0, NULL, NULL)) 69954194Speter outb(xiobase + com_scr, 0x80); /* no irq */ 70054194Speter else 70154194Speter outb(xiobase + com_scr, 0); 70251078Speter } 70353344Speter mcr_image = 0; 70451078Speter } 70551078Speter#endif /* COM_MULTIPORT */ 70654194Speter if (bus_get_resource(idev, SYS_RES_IRQ, 0, NULL, NULL) != 0) 70751078Speter mcr_image = 0; 70851078Speter 70951078Speter bzero(failures, sizeof failures); 71051078Speter iobase = rman_get_start(port); 71151078Speter 71251078Speter /* 71351078Speter * We don't want to get actual interrupts, just masked ones. 71451078Speter * Interrupts from this line should already be masked in the ICU, 71551078Speter * but mask them in the processor as well in case there are some 71651078Speter * (misconfigured) shared interrupts. 71751078Speter */ 71851078Speter disable_intr(); 71951078Speter/* EXTRA DELAY? */ 72051078Speter 72151078Speter /* 72251078Speter * Initialize the speed and the word size and wait long enough to 72351078Speter * drain the maximum of 16 bytes of junk in device output queues. 72451078Speter * The speed is undefined after a master reset and must be set 72551078Speter * before relying on anything related to output. There may be 72651078Speter * junk after a (very fast) soft reboot and (apparently) after 72751078Speter * master reset. 72851078Speter * XXX what about the UART bug avoided by waiting in comparam()? 72951078Speter * We don't want to to wait long enough to drain at 2 bps. 73051078Speter */ 73151078Speter if (iobase == siocniobase) 73251078Speter DELAY((16 + 1) * 1000000 / (comdefaultrate / 10)); 73351078Speter else { 73451078Speter outb(iobase + com_cfcr, CFCR_DLAB | CFCR_8BITS); 73551078Speter outb(iobase + com_dlbl, COMBRD(SIO_TEST_SPEED) & 0xff); 73651078Speter outb(iobase + com_dlbh, (u_int) COMBRD(SIO_TEST_SPEED) >> 8); 73751078Speter outb(iobase + com_cfcr, CFCR_8BITS); 73851078Speter DELAY((16 + 1) * 1000000 / (SIO_TEST_SPEED / 10)); 73951078Speter } 74051078Speter 74151078Speter /* 74251078Speter * Enable the interrupt gate and disable device interupts. This 74351078Speter * should leave the device driving the interrupt line low and 74451078Speter * guarantee an edge trigger if an interrupt can be generated. 74551078Speter */ 74651078Speter/* EXTRA DELAY? */ 74751078Speter outb(iobase + com_mcr, mcr_image); 74851078Speter outb(iobase + com_ier, 0); 74951078Speter DELAY(1000); /* XXX */ 75051078Speter irqmap[0] = isa_irq_pending(); 75151078Speter 75251078Speter /* 75351078Speter * Attempt to set loopback mode so that we can send a null byte 75451078Speter * without annoying any external device. 75551078Speter */ 75651078Speter/* EXTRA DELAY? */ 75751078Speter outb(iobase + com_mcr, mcr_image | MCR_LOOPBACK); 75851078Speter 75951078Speter /* 76051078Speter * Attempt to generate an output interrupt. On 8250's, setting 76151078Speter * IER_ETXRDY generates an interrupt independent of the current 76251078Speter * setting and independent of whether the THR is empty. On 16450's, 76351078Speter * setting IER_ETXRDY generates an interrupt independent of the 76451078Speter * current setting. On 16550A's, setting IER_ETXRDY only 76551078Speter * generates an interrupt when IER_ETXRDY is not already set. 76651078Speter */ 76751078Speter outb(iobase + com_ier, IER_ETXRDY); 76851078Speter 76951078Speter /* 77051078Speter * On some 16x50 incompatibles, setting IER_ETXRDY doesn't generate 77151078Speter * an interrupt. They'd better generate one for actually doing 77251078Speter * output. Loopback may be broken on the same incompatibles but 77351078Speter * it's unlikely to do more than allow the null byte out. 77451078Speter */ 77551078Speter outb(iobase + com_data, 0); 77651078Speter DELAY((1 + 2) * 1000000 / (SIO_TEST_SPEED / 10)); 77751078Speter 77851078Speter /* 77951078Speter * Turn off loopback mode so that the interrupt gate works again 78051078Speter * (MCR_IENABLE was hidden). This should leave the device driving 78151078Speter * an interrupt line high. It doesn't matter if the interrupt 78251078Speter * line oscillates while we are not looking at it, since interrupts 78351078Speter * are disabled. 78451078Speter */ 78551078Speter/* EXTRA DELAY? */ 78651078Speter outb(iobase + com_mcr, mcr_image); 78751078Speter 78851078Speter /* 78952471Simp * Some pcmcia cards have the "TXRDY bug", so we check everyone 79051078Speter * for IIR_TXRDY implementation ( Palido 321s, DC-1S... ) 79151078Speter */ 79253370Speter if (COM_NOPROBE(flags)) { 79353370Speter /* Reading IIR register twice */ 79453370Speter for (fn = 0; fn < 2; fn ++) { 79553370Speter DELAY(10000); 79653370Speter failures[6] = inb(iobase + com_iir); 79753370Speter } 79853370Speter /* Check IIR_TXRDY clear ? */ 79953370Speter result = 0; 80053370Speter if (failures[6] & IIR_TXRDY) { 80153370Speter /* Nop, Double check with clearing IER */ 80253370Speter outb(iobase + com_ier, 0); 80353370Speter if (inb(iobase + com_iir) & IIR_NOPEND) { 80453370Speter /* Ok. we're familia this gang */ 80553370Speter SET_FLAG(dev, COM_C_IIR_TXRDYBUG); 80653370Speter } else { 80753370Speter /* Unknown, Just omit this chip.. XXX */ 80853370Speter result = ENXIO; 80953370Speter } 81051078Speter } else { 81153370Speter /* OK. this is well-known guys */ 81253370Speter CLR_FLAG(dev, COM_C_IIR_TXRDYBUG); 81351078Speter } 81453344Speter outb(iobase + com_cfcr, CFCR_8BITS); 81553344Speter enable_intr(); 81653344Speter bus_release_resource(dev, SYS_RES_IOPORT, rid, port); 81753344Speter return (iobase == siocniobase ? 0 : result); 81853344Speter } 81953344Speter 82051078Speter /* 82151078Speter * Check that 82251078Speter * o the CFCR, IER and MCR in UART hold the values written to them 82351078Speter * (the values happen to be all distinct - this is good for 82451078Speter * avoiding false positive tests from bus echoes). 82551078Speter * o an output interrupt is generated and its vector is correct. 82651078Speter * o the interrupt goes away when the IIR in the UART is read. 82751078Speter */ 82851078Speter/* EXTRA DELAY? */ 82951078Speter failures[0] = inb(iobase + com_cfcr) - CFCR_8BITS; 83051078Speter failures[1] = inb(iobase + com_ier) - IER_ETXRDY; 83151078Speter failures[2] = inb(iobase + com_mcr) - mcr_image; 83251078Speter DELAY(10000); /* Some internal modems need this time */ 83351078Speter irqmap[1] = isa_irq_pending(); 83451078Speter failures[4] = (inb(iobase + com_iir) & IIR_IMASK) - IIR_TXRDY; 83551078Speter DELAY(1000); /* XXX */ 83651078Speter irqmap[2] = isa_irq_pending(); 83751078Speter failures[6] = (inb(iobase + com_iir) & IIR_IMASK) - IIR_NOPEND; 83851078Speter 83951078Speter /* 84051078Speter * Turn off all device interrupts and check that they go off properly. 84151078Speter * Leave MCR_IENABLE alone. For ports without a master port, it gates 84251078Speter * the OUT2 output of the UART to 84351078Speter * the ICU input. Closing the gate would give a floating ICU input 84451078Speter * (unless there is another device driving it) and spurious interrupts. 84551078Speter * (On the system that this was first tested on, the input floats high 84651078Speter * and gives a (masked) interrupt as soon as the gate is closed.) 84751078Speter */ 84851078Speter outb(iobase + com_ier, 0); 84951078Speter outb(iobase + com_cfcr, CFCR_8BITS); /* dummy to avoid bus echo */ 85051078Speter failures[7] = inb(iobase + com_ier); 85151078Speter DELAY(1000); /* XXX */ 85251078Speter irqmap[3] = isa_irq_pending(); 85351078Speter failures[9] = (inb(iobase + com_iir) & IIR_IMASK) - IIR_NOPEND; 85451078Speter 85551078Speter enable_intr(); 85651078Speter 85751078Speter irqs = irqmap[1] & ~irqmap[0]; 85854194Speter if (bus_get_resource(idev, SYS_RES_IRQ, 0, &xirq, NULL) == 0 && 85954194Speter ((1 << xirq) & irqs) == 0) 86051078Speter printf( 86154206Speter "sio%d: configured irq %ld not in bitmap of probed irqs %#x\n", 86253344Speter device_get_unit(dev), xirq, irqs); 86351078Speter if (bootverbose) 86451078Speter printf("sio%d: irq maps: %#x %#x %#x %#x\n", 86551078Speter device_get_unit(dev), 86651078Speter irqmap[0], irqmap[1], irqmap[2], irqmap[3]); 86751078Speter 86851078Speter result = 0; 86951078Speter for (fn = 0; fn < sizeof failures; ++fn) 87051078Speter if (failures[fn]) { 87151078Speter outb(iobase + com_mcr, 0); 87251078Speter result = ENXIO; 87351078Speter if (bootverbose) { 87451078Speter printf("sio%d: probe failed test(s):", 87551078Speter device_get_unit(dev)); 87651078Speter for (fn = 0; fn < sizeof failures; ++fn) 87751078Speter if (failures[fn]) 87851078Speter printf(" %d", fn); 87951078Speter printf("\n"); 88051078Speter } 88151078Speter break; 88251078Speter } 88351078Speter bus_release_resource(dev, SYS_RES_IOPORT, rid, port); 88451078Speter return (iobase == siocniobase ? 0 : result); 88551078Speter} 88651078Speter 88751078Speter#ifdef COM_ESP 88851078Speterstatic int 88951078Speterespattach(com, esp_port) 89051078Speter struct com_s *com; 89151078Speter Port_t esp_port; 89251078Speter{ 89351078Speter u_char dips; 89451078Speter u_char val; 89551078Speter 89651078Speter /* 89751078Speter * Check the ESP-specific I/O port to see if we're an ESP 89851078Speter * card. If not, return failure immediately. 89951078Speter */ 90051078Speter if ((inb(esp_port) & 0xf3) == 0) { 90151078Speter printf(" port 0x%x is not an ESP board?\n", esp_port); 90251078Speter return (0); 90351078Speter } 90451078Speter 90551078Speter /* 90651078Speter * We've got something that claims to be a Hayes ESP card. 90751078Speter * Let's hope so. 90851078Speter */ 90951078Speter 91051078Speter /* Get the dip-switch configuration */ 91151078Speter outb(esp_port + ESP_CMD1, ESP_GETDIPS); 91251078Speter dips = inb(esp_port + ESP_STATUS1); 91351078Speter 91451078Speter /* 91551078Speter * Bits 0,1 of dips say which COM port we are. 91651078Speter */ 91751078Speter if (com->iobase == likely_com_ports[dips & 0x03]) 91851078Speter printf(" : ESP"); 91951078Speter else { 92051078Speter printf(" esp_port has com %d\n", dips & 0x03); 92151078Speter return (0); 92251078Speter } 92351078Speter 92451078Speter /* 92551078Speter * Check for ESP version 2.0 or later: bits 4,5,6 = 010. 92651078Speter */ 92751078Speter outb(esp_port + ESP_CMD1, ESP_GETTEST); 92851078Speter val = inb(esp_port + ESP_STATUS1); /* clear reg 1 */ 92951078Speter val = inb(esp_port + ESP_STATUS2); 93051078Speter if ((val & 0x70) < 0x20) { 93151078Speter printf("-old (%o)", val & 0x70); 93251078Speter return (0); 93351078Speter } 93451078Speter 93551078Speter /* 93651078Speter * Check for ability to emulate 16550: bit 7 == 1 93751078Speter */ 93851078Speter if ((dips & 0x80) == 0) { 93951078Speter printf(" slave"); 94051078Speter return (0); 94151078Speter } 94251078Speter 94351078Speter /* 94451078Speter * Okay, we seem to be a Hayes ESP card. Whee. 94551078Speter */ 94651078Speter com->esp = TRUE; 94751078Speter com->esp_port = esp_port; 94851078Speter return (1); 94951078Speter} 95051078Speter#endif /* COM_ESP */ 95151078Speter 95251078Speterstatic int 95352471Simpsio_isa_attach(dev) 95452471Simp device_t dev; 95552471Simp{ 95652471Simp return (sioattach(dev)); 95752471Simp} 95852471Simp 95952471Simpstatic int 96051078Spetersioattach(dev) 96151078Speter device_t dev; 96251078Speter{ 96351078Speter struct com_s *com; 96451078Speter#ifdef COM_ESP 96551078Speter Port_t *espp; 96651078Speter#endif 96751078Speter Port_t iobase; 96851078Speter int unit; 96953344Speter u_int flags; 97051078Speter int rid; 97151078Speter struct resource *port; 97253344Speter int ret; 97351078Speter 97451078Speter rid = 0; 97551078Speter port = bus_alloc_resource(dev, SYS_RES_IOPORT, &rid, 97651078Speter 0, ~0, IO_COMSIZE, RF_ACTIVE); 97751078Speter if (!port) 97851078Speter return ENXIO; 97951078Speter 98051078Speter iobase = rman_get_start(port); 98151078Speter unit = device_get_unit(dev); 98251078Speter com = device_get_softc(dev); 98353344Speter flags = device_get_flags(dev); 98451078Speter 98553344Speter if (unit >= sio_numunits) 98653344Speter sio_numunits = unit + 1; 98751078Speter /* 98851078Speter * sioprobe() has initialized the device registers as follows: 98951078Speter * o cfcr = CFCR_8BITS. 99051078Speter * It is most important that CFCR_DLAB is off, so that the 99151078Speter * data port is not hidden when we enable interrupts. 99251078Speter * o ier = 0. 99351078Speter * Interrupts are only enabled when the line is open. 99451078Speter * o mcr = MCR_IENABLE, or 0 if the port has AST/4 compatible 99551078Speter * interrupt control register or the config specifies no irq. 99651078Speter * Keeping MCR_DTR and MCR_RTS off might stop the external 99751078Speter * device from sending before we are ready. 99851078Speter */ 99951078Speter bzero(com, sizeof *com); 100051078Speter com->unit = unit; 100151078Speter com->ioportres = port; 100251078Speter com->cfcr_image = CFCR_8BITS; 100351078Speter com->dtr_wait = 3 * hz; 100451078Speter com->loses_outints = COM_LOSESOUTINTS(flags) != 0; 100554194Speter com->no_irq = bus_get_resource(dev, SYS_RES_IRQ, 0, NULL, NULL); 100651078Speter com->tx_fifo_size = 1; 100751078Speter com->obufs[0].l_head = com->obuf1; 100851078Speter com->obufs[1].l_head = com->obuf2; 100951078Speter 101051078Speter com->iobase = iobase; 101151078Speter com->data_port = iobase + com_data; 101251078Speter com->int_id_port = iobase + com_iir; 101351078Speter com->modem_ctl_port = iobase + com_mcr; 101451078Speter com->mcr_image = inb(com->modem_ctl_port); 101551078Speter com->line_status_port = iobase + com_lsr; 101651078Speter com->modem_status_port = iobase + com_msr; 101751078Speter com->intr_ctl_port = iobase + com_ier; 101851078Speter 101951078Speter /* 102051078Speter * We don't use all the flags from <sys/ttydefaults.h> since they 102151078Speter * are only relevant for logins. It's important to have echo off 102251078Speter * initially so that the line doesn't start blathering before the 102351078Speter * echo flag can be turned off. 102451078Speter */ 102551078Speter com->it_in.c_iflag = 0; 102651078Speter com->it_in.c_oflag = 0; 102751078Speter com->it_in.c_cflag = TTYDEF_CFLAG; 102851078Speter com->it_in.c_lflag = 0; 102951078Speter if (unit == comconsole) { 103051078Speter com->it_in.c_iflag = TTYDEF_IFLAG; 103151078Speter com->it_in.c_oflag = TTYDEF_OFLAG; 103251078Speter com->it_in.c_cflag = TTYDEF_CFLAG | CLOCAL; 103351078Speter com->it_in.c_lflag = TTYDEF_LFLAG; 103451078Speter com->lt_out.c_cflag = com->lt_in.c_cflag = CLOCAL; 103551078Speter com->lt_out.c_ispeed = com->lt_out.c_ospeed = 103651078Speter com->lt_in.c_ispeed = com->lt_in.c_ospeed = 103751078Speter com->it_in.c_ispeed = com->it_in.c_ospeed = comdefaultrate; 103851078Speter } else 103951078Speter com->it_in.c_ispeed = com->it_in.c_ospeed = TTYDEF_SPEED; 104051078Speter if (siosetwater(com, com->it_in.c_ispeed) != 0) { 104151078Speter enable_intr(); 104251078Speter free(com, M_DEVBUF); 104351078Speter return (0); 104451078Speter } 104551078Speter enable_intr(); 104651078Speter termioschars(&com->it_in); 104751078Speter com->it_out = com->it_in; 104851078Speter 104951078Speter /* attempt to determine UART type */ 105051078Speter printf("sio%d: type", unit); 105151078Speter 105251078Speter 105351078Speter#ifdef COM_MULTIPORT 105451078Speter if (!COM_ISMULTIPORT(flags) && !COM_IIR_TXRDYBUG(flags)) 105551078Speter#else 105651078Speter if (!COM_IIR_TXRDYBUG(flags)) 105751078Speter#endif 105851078Speter { 105951078Speter u_char scr; 106051078Speter u_char scr1; 106151078Speter u_char scr2; 106251078Speter 106351078Speter scr = inb(iobase + com_scr); 106451078Speter outb(iobase + com_scr, 0xa5); 106551078Speter scr1 = inb(iobase + com_scr); 106651078Speter outb(iobase + com_scr, 0x5a); 106751078Speter scr2 = inb(iobase + com_scr); 106851078Speter outb(iobase + com_scr, scr); 106951078Speter if (scr1 != 0xa5 || scr2 != 0x5a) { 107051078Speter printf(" 8250"); 107151078Speter goto determined_type; 107251078Speter } 107351078Speter } 107451078Speter outb(iobase + com_fifo, FIFO_ENABLE | FIFO_RX_HIGH); 107551078Speter DELAY(100); 107651078Speter com->st16650a = 0; 107751078Speter switch (inb(com->int_id_port) & IIR_FIFO_MASK) { 107851078Speter case FIFO_RX_LOW: 107951078Speter printf(" 16450"); 108051078Speter break; 108151078Speter case FIFO_RX_MEDL: 108251078Speter printf(" 16450?"); 108351078Speter break; 108451078Speter case FIFO_RX_MEDH: 108551078Speter printf(" 16550?"); 108651078Speter break; 108751078Speter case FIFO_RX_HIGH: 108851078Speter if (COM_NOFIFO(flags)) { 108951078Speter printf(" 16550A fifo disabled"); 109051078Speter } else { 109151078Speter com->hasfifo = TRUE; 109251078Speter if (COM_ST16650A(flags)) { 109351078Speter com->st16650a = 1; 109451078Speter com->tx_fifo_size = 32; 109551078Speter printf(" ST16650A"); 109651078Speter } else { 109751078Speter com->tx_fifo_size = COM_FIFOSIZE(flags); 109851078Speter printf(" 16550A"); 109951078Speter } 110051078Speter } 110151078Speter#ifdef COM_ESP 110251078Speter for (espp = likely_esp_ports; *espp != 0; espp++) 110351078Speter if (espattach(com, *espp)) { 110451078Speter com->tx_fifo_size = 1024; 110551078Speter break; 110651078Speter } 110751078Speter#endif 110851078Speter if (!com->st16650a) { 110951078Speter if (!com->tx_fifo_size) 111051078Speter com->tx_fifo_size = 16; 111151078Speter else 111251078Speter printf(" lookalike with %d bytes FIFO", 111351078Speter com->tx_fifo_size); 111451078Speter } 111551078Speter 111651078Speter break; 111751078Speter } 111851078Speter 111951078Speter#ifdef COM_ESP 112051078Speter if (com->esp) { 112151078Speter /* 112251078Speter * Set 16550 compatibility mode. 112351078Speter * We don't use the ESP_MODE_SCALE bit to increase the 112451078Speter * fifo trigger levels because we can't handle large 112551078Speter * bursts of input. 112651078Speter * XXX flow control should be set in comparam(), not here. 112751078Speter */ 112851078Speter outb(com->esp_port + ESP_CMD1, ESP_SETMODE); 112951078Speter outb(com->esp_port + ESP_CMD2, ESP_MODE_RTS | ESP_MODE_FIFO); 113051078Speter 113151078Speter /* Set RTS/CTS flow control. */ 113251078Speter outb(com->esp_port + ESP_CMD1, ESP_SETFLOWTYPE); 113351078Speter outb(com->esp_port + ESP_CMD2, ESP_FLOW_RTS); 113451078Speter outb(com->esp_port + ESP_CMD2, ESP_FLOW_CTS); 113551078Speter 113651078Speter /* Set flow-control levels. */ 113751078Speter outb(com->esp_port + ESP_CMD1, ESP_SETRXFLOW); 113851078Speter outb(com->esp_port + ESP_CMD2, HIBYTE(768)); 113951078Speter outb(com->esp_port + ESP_CMD2, LOBYTE(768)); 114051078Speter outb(com->esp_port + ESP_CMD2, HIBYTE(512)); 114151078Speter outb(com->esp_port + ESP_CMD2, LOBYTE(512)); 114251078Speter } 114351078Speter#endif /* COM_ESP */ 114451078Speter outb(iobase + com_fifo, 0); 114551078Speterdetermined_type: ; 114651078Speter 114751078Speter#ifdef COM_MULTIPORT 114851078Speter if (COM_ISMULTIPORT(flags)) { 114953344Speter device_t masterdev; 115053344Speter 115151078Speter com->multiport = TRUE; 115251078Speter printf(" (multiport"); 115351078Speter if (unit == COM_MPMASTER(flags)) 115451078Speter printf(" master"); 115551078Speter printf(")"); 115653344Speter masterdev = devclass_get_device(sio_devclass, 115753344Speter COM_MPMASTER(flags)); 115854194Speter com->no_irq = bus_get_resource(masterdev, SYS_RES_IRQ, 0, NULL, 115954194Speter NULL); 116051078Speter } 116151078Speter#endif /* COM_MULTIPORT */ 116251078Speter if (unit == comconsole) 116351078Speter printf(", console"); 116453344Speter if (COM_IIR_TXRDYBUG(flags)) 116551078Speter printf(" with a bogus IIR_TXRDY register"); 116651078Speter printf("\n"); 116751078Speter 116851078Speter if (!sio_registered) { 116951078Speter register_swi(SWI_TTY, siopoll); 117051078Speter sio_registered = TRUE; 117151078Speter } 117251078Speter make_dev(&sio_cdevsw, unit, 117351078Speter UID_ROOT, GID_WHEEL, 0600, "ttyd%r", unit); 117451078Speter make_dev(&sio_cdevsw, unit | CONTROL_INIT_STATE, 117551078Speter UID_ROOT, GID_WHEEL, 0600, "ttyid%r", unit); 117651078Speter make_dev(&sio_cdevsw, unit | CONTROL_LOCK_STATE, 117751078Speter UID_ROOT, GID_WHEEL, 0600, "ttyld%r", unit); 117851078Speter make_dev(&sio_cdevsw, unit | CALLOUT_MASK, 117951078Speter UID_UUCP, GID_DIALER, 0660, "cuaa%r", unit); 118051078Speter make_dev(&sio_cdevsw, unit | CALLOUT_MASK | CONTROL_INIT_STATE, 118151078Speter UID_UUCP, GID_DIALER, 0660, "cuaia%r", unit); 118251078Speter make_dev(&sio_cdevsw, unit | CALLOUT_MASK | CONTROL_LOCK_STATE, 118351078Speter UID_UUCP, GID_DIALER, 0660, "cuala%r", unit); 118451078Speter com->flags = flags; 118551078Speter com->pps.ppscap = PPS_CAPTUREASSERT | PPS_CAPTURECLEAR; 118651078Speter pps_init(&com->pps); 118751078Speter 118851078Speter rid = 0; 118951078Speter com->irqres = bus_alloc_resource(dev, SYS_RES_IRQ, &rid, 0ul, ~0ul, 1, 119053344Speter RF_ACTIVE); 119153344Speter if (com->irqres) { 119253344Speter ret = BUS_SETUP_INTR(device_get_parent(dev), dev, com->irqres, 119354194Speter INTR_TYPE_TTY | INTR_TYPE_FAST, 119454386Simp siointr, com, &com->cookie); 119554194Speter if (ret) { 119654194Speter ret = BUS_SETUP_INTR(device_get_parent(dev), dev, 119754194Speter com->irqres, INTR_TYPE_TTY, 119854386Simp siointr, com, &com->cookie); 119954194Speter if (ret == 0) 120054194Speter device_printf(dev, "unable to activate interrupt in fast mode - using normal mode"); 120154194Speter } 120253344Speter if (ret) 120353344Speter device_printf(dev, "could not activate interrupt\n"); 120453344Speter } 120551078Speter 120651078Speter return (0); 120751078Speter} 120851078Speter 120951078Speterstatic int 121051078Spetersioopen(dev, flag, mode, p) 121151078Speter dev_t dev; 121251078Speter int flag; 121351078Speter int mode; 121451078Speter struct proc *p; 121551078Speter{ 121651078Speter struct com_s *com; 121751078Speter int error; 121851078Speter Port_t iobase; 121951078Speter int mynor; 122051078Speter int s; 122151078Speter struct tty *tp; 122251078Speter int unit; 122351078Speter 122451078Speter mynor = minor(dev); 122551078Speter unit = MINOR_TO_UNIT(mynor); 122653344Speter com = com_addr(unit); 122753344Speter if (com == NULL) 122851078Speter return (ENXIO); 122951078Speter if (com->gone) 123051078Speter return (ENXIO); 123151078Speter if (mynor & CONTROL_MASK) 123251078Speter return (0); 123351078Speter tp = dev->si_tty = com->tp = ttymalloc(com->tp); 123451078Speter s = spltty(); 123551078Speter /* 123651078Speter * We jump to this label after all non-interrupted sleeps to pick 123751078Speter * up any changes of the device state. 123851078Speter */ 123951078Speteropen_top: 124051078Speter while (com->state & CS_DTR_OFF) { 124151078Speter error = tsleep(&com->dtr_wait, TTIPRI | PCATCH, "siodtr", 0); 124251078Speter if (com_addr(unit) == NULL) 124351078Speter return (ENXIO); 124451078Speter if (error != 0 || com->gone) 124551078Speter goto out; 124651078Speter } 124751078Speter if (tp->t_state & TS_ISOPEN) { 124851078Speter /* 124951078Speter * The device is open, so everything has been initialized. 125051078Speter * Handle conflicts. 125151078Speter */ 125251078Speter if (mynor & CALLOUT_MASK) { 125351078Speter if (!com->active_out) { 125451078Speter error = EBUSY; 125551078Speter goto out; 125651078Speter } 125751078Speter } else { 125851078Speter if (com->active_out) { 125951078Speter if (flag & O_NONBLOCK) { 126051078Speter error = EBUSY; 126151078Speter goto out; 126251078Speter } 126351078Speter error = tsleep(&com->active_out, 126451078Speter TTIPRI | PCATCH, "siobi", 0); 126551078Speter if (com_addr(unit) == NULL) 126651078Speter return (ENXIO); 126751078Speter if (error != 0 || com->gone) 126851078Speter goto out; 126951078Speter goto open_top; 127051078Speter } 127151078Speter } 127251078Speter if (tp->t_state & TS_XCLUDE && 127351078Speter suser(p)) { 127451078Speter error = EBUSY; 127551078Speter goto out; 127651078Speter } 127751078Speter } else { 127851078Speter /* 127951078Speter * The device isn't open, so there are no conflicts. 128051078Speter * Initialize it. Initialization is done twice in many 128151078Speter * cases: to preempt sleeping callin opens if we are 128251078Speter * callout, and to complete a callin open after DCD rises. 128351078Speter */ 128451078Speter tp->t_oproc = comstart; 128551078Speter tp->t_param = comparam; 128651654Sphk tp->t_stop = comstop; 128751078Speter tp->t_dev = dev; 128851078Speter tp->t_termios = mynor & CALLOUT_MASK 128951078Speter ? com->it_out : com->it_in; 129051078Speter (void)commctl(com, TIOCM_DTR | TIOCM_RTS, DMSET); 129151078Speter com->poll = com->no_irq; 129251078Speter com->poll_output = com->loses_outints; 129351078Speter ++com->wopeners; 129451078Speter error = comparam(tp, &tp->t_termios); 129551078Speter --com->wopeners; 129651078Speter if (error != 0) 129751078Speter goto out; 129851078Speter /* 129951078Speter * XXX we should goto open_top if comparam() slept. 130051078Speter */ 130151078Speter iobase = com->iobase; 130251078Speter if (com->hasfifo) { 130351078Speter /* 130451078Speter * (Re)enable and drain fifos. 130551078Speter * 130651078Speter * Certain SMC chips cause problems if the fifos 130751078Speter * are enabled while input is ready. Turn off the 130851078Speter * fifo if necessary to clear the input. We test 130951078Speter * the input ready bit after enabling the fifos 131051078Speter * since we've already enabled them in comparam() 131151078Speter * and to handle races between enabling and fresh 131251078Speter * input. 131351078Speter */ 131451078Speter while (TRUE) { 131551078Speter outb(iobase + com_fifo, 131651078Speter FIFO_RCV_RST | FIFO_XMT_RST 131751078Speter | com->fifo_image); 131851078Speter /* 131951078Speter * XXX the delays are for superstitious 132051078Speter * historical reasons. It must be less than 132151078Speter * the character time at the maximum 132251078Speter * supported speed (87 usec at 115200 bps 132351078Speter * 8N1). Otherwise we might loop endlessly 132451078Speter * if data is streaming in. We used to use 132551078Speter * delays of 100. That usually worked 132651078Speter * because DELAY(100) used to usually delay 132751078Speter * for about 85 usec instead of 100. 132851078Speter */ 132951078Speter DELAY(50); 133051078Speter if (!(inb(com->line_status_port) & LSR_RXRDY)) 133151078Speter break; 133251078Speter outb(iobase + com_fifo, 0); 133351078Speter DELAY(50); 133451078Speter (void) inb(com->data_port); 133551078Speter } 133651078Speter } 133751078Speter 133851078Speter disable_intr(); 133951078Speter (void) inb(com->line_status_port); 134051078Speter (void) inb(com->data_port); 134151078Speter com->prev_modem_status = com->last_modem_status 134251078Speter = inb(com->modem_status_port); 134351078Speter if (COM_IIR_TXRDYBUG(com->flags)) { 134451078Speter outb(com->intr_ctl_port, IER_ERXRDY | IER_ERLS 134551078Speter | IER_EMSC); 134651078Speter } else { 134751078Speter outb(com->intr_ctl_port, IER_ERXRDY | IER_ETXRDY 134851078Speter | IER_ERLS | IER_EMSC); 134951078Speter } 135051078Speter enable_intr(); 135151078Speter /* 135251078Speter * Handle initial DCD. Callout devices get a fake initial 135351078Speter * DCD (trapdoor DCD). If we are callout, then any sleeping 135451078Speter * callin opens get woken up and resume sleeping on "siobi" 135551078Speter * instead of "siodcd". 135651078Speter */ 135751078Speter /* 135851078Speter * XXX `mynor & CALLOUT_MASK' should be 135951078Speter * `tp->t_cflag & (SOFT_CARRIER | TRAPDOOR_CARRIER) where 136051078Speter * TRAPDOOR_CARRIER is the default initial state for callout 136151078Speter * devices and SOFT_CARRIER is like CLOCAL except it hides 136251078Speter * the true carrier. 136351078Speter */ 136451078Speter if (com->prev_modem_status & MSR_DCD || mynor & CALLOUT_MASK) 136551078Speter (*linesw[tp->t_line].l_modem)(tp, 1); 136651078Speter } 136751078Speter /* 136851078Speter * Wait for DCD if necessary. 136951078Speter */ 137051078Speter if (!(tp->t_state & TS_CARR_ON) && !(mynor & CALLOUT_MASK) 137151078Speter && !(tp->t_cflag & CLOCAL) && !(flag & O_NONBLOCK)) { 137251078Speter ++com->wopeners; 137351078Speter error = tsleep(TSA_CARR_ON(tp), TTIPRI | PCATCH, "siodcd", 0); 137451078Speter if (com_addr(unit) == NULL) 137551078Speter return (ENXIO); 137651078Speter --com->wopeners; 137751078Speter if (error != 0 || com->gone) 137851078Speter goto out; 137951078Speter goto open_top; 138051078Speter } 138151078Speter error = (*linesw[tp->t_line].l_open)(dev, tp); 138251078Speter disc_optim(tp, &tp->t_termios, com); 138351078Speter if (tp->t_state & TS_ISOPEN && mynor & CALLOUT_MASK) 138451078Speter com->active_out = TRUE; 138551078Speter siosettimeout(); 138651078Speterout: 138751078Speter splx(s); 138851078Speter if (!(tp->t_state & TS_ISOPEN) && com->wopeners == 0) 138951078Speter comhardclose(com); 139051078Speter return (error); 139151078Speter} 139251078Speter 139351078Speterstatic int 139451078Spetersioclose(dev, flag, mode, p) 139551078Speter dev_t dev; 139651078Speter int flag; 139751078Speter int mode; 139851078Speter struct proc *p; 139951078Speter{ 140051078Speter struct com_s *com; 140151078Speter int mynor; 140251078Speter int s; 140351078Speter struct tty *tp; 140451078Speter 140551078Speter mynor = minor(dev); 140651078Speter if (mynor & CONTROL_MASK) 140751078Speter return (0); 140851078Speter com = com_addr(MINOR_TO_UNIT(mynor)); 140951078Speter tp = com->tp; 141051078Speter s = spltty(); 141151078Speter (*linesw[tp->t_line].l_close)(tp, flag); 141251078Speter disc_optim(tp, &tp->t_termios, com); 141351654Sphk comstop(tp, FREAD | FWRITE); 141451078Speter comhardclose(com); 141551078Speter ttyclose(tp); 141651078Speter siosettimeout(); 141751078Speter splx(s); 141851078Speter if (com->gone) { 141951078Speter printf("sio%d: gone\n", com->unit); 142051078Speter s = spltty(); 142151078Speter if (com->ibuf != NULL) 142251078Speter free(com->ibuf, M_DEVBUF); 142351078Speter bzero(tp, sizeof *tp); 142451078Speter free(com, M_DEVBUF); 142551078Speter splx(s); 142651078Speter } 142751078Speter return (0); 142851078Speter} 142951078Speter 143051078Speterstatic void 143151078Spetercomhardclose(com) 143251078Speter struct com_s *com; 143351078Speter{ 143451078Speter Port_t iobase; 143551078Speter int s; 143651078Speter struct tty *tp; 143751078Speter int unit; 143851078Speter 143951078Speter unit = com->unit; 144051078Speter iobase = com->iobase; 144151078Speter s = spltty(); 144251078Speter com->poll = FALSE; 144351078Speter com->poll_output = FALSE; 144451078Speter com->do_timestamp = FALSE; 144551078Speter com->do_dcd_timestamp = FALSE; 144651078Speter com->pps.ppsparam.mode = 0; 144751078Speter outb(iobase + com_cfcr, com->cfcr_image &= ~CFCR_SBREAK); 144851078Speter { 144951078Speter outb(iobase + com_ier, 0); 145051078Speter tp = com->tp; 145151078Speter if (tp->t_cflag & HUPCL 145251078Speter /* 145351078Speter * XXX we will miss any carrier drop between here and the 145451078Speter * next open. Perhaps we should watch DCD even when the 145551078Speter * port is closed; it is not sufficient to check it at 145651078Speter * the next open because it might go up and down while 145751078Speter * we're not watching. 145851078Speter */ 145951078Speter || (!com->active_out 146051078Speter && !(com->prev_modem_status & MSR_DCD) 146151078Speter && !(com->it_in.c_cflag & CLOCAL)) 146251078Speter || !(tp->t_state & TS_ISOPEN)) { 146351078Speter (void)commctl(com, TIOCM_DTR, DMBIC); 146451078Speter if (com->dtr_wait != 0 && !(com->state & CS_DTR_OFF)) { 146551078Speter timeout(siodtrwakeup, com, com->dtr_wait); 146651078Speter com->state |= CS_DTR_OFF; 146751078Speter } 146851078Speter } 146951078Speter } 147051078Speter if (com->hasfifo) { 147151078Speter /* 147251078Speter * Disable fifos so that they are off after controlled 147351078Speter * reboots. Some BIOSes fail to detect 16550s when the 147451078Speter * fifos are enabled. 147551078Speter */ 147651078Speter outb(iobase + com_fifo, 0); 147751078Speter } 147851078Speter com->active_out = FALSE; 147951078Speter wakeup(&com->active_out); 148051078Speter wakeup(TSA_CARR_ON(tp)); /* restart any wopeners */ 148151078Speter splx(s); 148251078Speter} 148351078Speter 148451078Speterstatic int 148551078Spetersioread(dev, uio, flag) 148651078Speter dev_t dev; 148751078Speter struct uio *uio; 148851078Speter int flag; 148951078Speter{ 149051078Speter int mynor; 149151078Speter struct com_s *com; 149251078Speter 149351078Speter mynor = minor(dev); 149451078Speter if (mynor & CONTROL_MASK) 149551078Speter return (ENODEV); 149651078Speter com = com_addr(MINOR_TO_UNIT(mynor)); 149751078Speter if (com->gone) 149851078Speter return (ENODEV); 149951078Speter return ((*linesw[com->tp->t_line].l_read)(com->tp, uio, flag)); 150051078Speter} 150151078Speter 150251078Speterstatic int 150351078Spetersiowrite(dev, uio, flag) 150451078Speter dev_t dev; 150551078Speter struct uio *uio; 150651078Speter int flag; 150751078Speter{ 150851078Speter int mynor; 150951078Speter struct com_s *com; 151051078Speter int unit; 151151078Speter 151251078Speter mynor = minor(dev); 151351078Speter if (mynor & CONTROL_MASK) 151451078Speter return (ENODEV); 151551078Speter 151651078Speter unit = MINOR_TO_UNIT(mynor); 151751078Speter com = com_addr(unit); 151851078Speter if (com->gone) 151951078Speter return (ENODEV); 152051078Speter /* 152151078Speter * (XXX) We disallow virtual consoles if the physical console is 152251078Speter * a serial port. This is in case there is a display attached that 152351078Speter * is not the console. In that situation we don't need/want the X 152451078Speter * server taking over the console. 152551078Speter */ 152651078Speter if (constty != NULL && unit == comconsole) 152751078Speter constty = NULL; 152851078Speter return ((*linesw[com->tp->t_line].l_write)(com->tp, uio, flag)); 152951078Speter} 153051078Speter 153151078Speterstatic void 153251078Spetersiobusycheck(chan) 153351078Speter void *chan; 153451078Speter{ 153551078Speter struct com_s *com; 153651078Speter int s; 153751078Speter 153851078Speter com = (struct com_s *)chan; 153951078Speter 154051078Speter /* 154151078Speter * Clear TS_BUSY if low-level output is complete. 154251078Speter * spl locking is sufficient because siointr1() does not set CS_BUSY. 154351078Speter * If siointr1() clears CS_BUSY after we look at it, then we'll get 154451078Speter * called again. Reading the line status port outside of siointr1() 154551078Speter * is safe because CS_BUSY is clear so there are no output interrupts 154651078Speter * to lose. 154751078Speter */ 154851078Speter s = spltty(); 154951078Speter if (com->state & CS_BUSY) 155051078Speter com->extra_state &= ~CSE_BUSYCHECK; /* False alarm. */ 155151078Speter else if ((inb(com->line_status_port) & (LSR_TSRE | LSR_TXRDY)) 155251078Speter == (LSR_TSRE | LSR_TXRDY)) { 155351078Speter com->tp->t_state &= ~TS_BUSY; 155451078Speter ttwwakeup(com->tp); 155551078Speter com->extra_state &= ~CSE_BUSYCHECK; 155651078Speter } else 155751078Speter timeout(siobusycheck, com, hz / 100); 155851078Speter splx(s); 155951078Speter} 156051078Speter 156151078Speterstatic void 156251078Spetersiodtrwakeup(chan) 156351078Speter void *chan; 156451078Speter{ 156551078Speter struct com_s *com; 156651078Speter 156751078Speter com = (struct com_s *)chan; 156851078Speter com->state &= ~CS_DTR_OFF; 156951078Speter wakeup(&com->dtr_wait); 157051078Speter} 157151078Speter 157251078Speterstatic void 157351078Spetersioinput(com) 157451078Speter struct com_s *com; 157551078Speter{ 157651078Speter u_char *buf; 157751078Speter int incc; 157851078Speter u_char line_status; 157951078Speter int recv_data; 158051078Speter struct tty *tp; 158151078Speter 158251078Speter buf = com->ibuf; 158351078Speter tp = com->tp; 158451078Speter if (!(tp->t_state & TS_ISOPEN) || !(tp->t_cflag & CREAD)) { 158551078Speter com_events -= (com->iptr - com->ibuf); 158651078Speter com->iptr = com->ibuf; 158751078Speter return; 158851078Speter } 158951078Speter if (tp->t_state & TS_CAN_BYPASS_L_RINT) { 159051078Speter /* 159151078Speter * Avoid the grotesquely inefficient lineswitch routine 159251078Speter * (ttyinput) in "raw" mode. It usually takes about 450 159351078Speter * instructions (that's without canonical processing or echo!). 159451078Speter * slinput is reasonably fast (usually 40 instructions plus 159551078Speter * call overhead). 159651078Speter */ 159751078Speter do { 159851078Speter enable_intr(); 159951078Speter incc = com->iptr - buf; 160051078Speter if (tp->t_rawq.c_cc + incc > tp->t_ihiwat 160151078Speter && (com->state & CS_RTS_IFLOW 160251078Speter || tp->t_iflag & IXOFF) 160351078Speter && !(tp->t_state & TS_TBLOCK)) 160451078Speter ttyblock(tp); 160551078Speter com->delta_error_counts[CE_TTY_BUF_OVERFLOW] 160651078Speter += b_to_q((char *)buf, incc, &tp->t_rawq); 160751078Speter buf += incc; 160851078Speter tk_nin += incc; 160951078Speter tk_rawcc += incc; 161051078Speter tp->t_rawcc += incc; 161151078Speter ttwakeup(tp); 161251078Speter if (tp->t_state & TS_TTSTOP 161351078Speter && (tp->t_iflag & IXANY 161451078Speter || tp->t_cc[VSTART] == tp->t_cc[VSTOP])) { 161551078Speter tp->t_state &= ~TS_TTSTOP; 161651078Speter tp->t_lflag &= ~FLUSHO; 161751078Speter comstart(tp); 161851078Speter } 161951078Speter disable_intr(); 162051078Speter } while (buf < com->iptr); 162151078Speter } else { 162251078Speter do { 162351078Speter enable_intr(); 162451078Speter line_status = buf[com->ierroff]; 162551078Speter recv_data = *buf++; 162651078Speter if (line_status 162751078Speter & (LSR_BI | LSR_FE | LSR_OE | LSR_PE)) { 162851078Speter if (line_status & LSR_BI) 162951078Speter recv_data |= TTY_BI; 163051078Speter if (line_status & LSR_FE) 163151078Speter recv_data |= TTY_FE; 163251078Speter if (line_status & LSR_OE) 163351078Speter recv_data |= TTY_OE; 163451078Speter if (line_status & LSR_PE) 163551078Speter recv_data |= TTY_PE; 163651078Speter } 163751078Speter (*linesw[tp->t_line].l_rint)(recv_data, tp); 163851078Speter disable_intr(); 163951078Speter } while (buf < com->iptr); 164051078Speter } 164151078Speter com_events -= (com->iptr - com->ibuf); 164251078Speter com->iptr = com->ibuf; 164351078Speter 164451078Speter /* 164551078Speter * There is now room for another low-level buffer full of input, 164651078Speter * so enable RTS if it is now disabled and there is room in the 164751078Speter * high-level buffer. 164851078Speter */ 164951078Speter if ((com->state & CS_RTS_IFLOW) && !(com->mcr_image & MCR_RTS) && 165051078Speter !(tp->t_state & TS_TBLOCK)) 165151078Speter outb(com->modem_ctl_port, com->mcr_image |= MCR_RTS); 165251078Speter} 165351078Speter 165451078Spetervoid 165551078Spetersiointr(arg) 165651078Speter void *arg; 165751078Speter{ 165851078Speter#ifndef COM_MULTIPORT 165951078Speter COM_LOCK(); 166051078Speter siointr1((struct com_s *) arg); 166151078Speter COM_UNLOCK(); 166251078Speter#else /* COM_MULTIPORT */ 166351078Speter bool_t possibly_more_intrs; 166451078Speter int unit; 166551078Speter struct com_s *com; 166651078Speter 166751078Speter /* 166851078Speter * Loop until there is no activity on any port. This is necessary 166951078Speter * to get an interrupt edge more than to avoid another interrupt. 167051078Speter * If the IRQ signal is just an OR of the IRQ signals from several 167151078Speter * devices, then the edge from one may be lost because another is 167251078Speter * on. 167351078Speter */ 167451078Speter COM_LOCK(); 167551078Speter do { 167651078Speter possibly_more_intrs = FALSE; 167753344Speter for (unit = 0; unit < sio_numunits; ++unit) { 167851078Speter com = com_addr(unit); 167951078Speter /* 168051078Speter * XXX COM_LOCK(); 168151078Speter * would it work here, or be counter-productive? 168251078Speter */ 168351078Speter if (com != NULL 168451078Speter && !com->gone 168551078Speter && (inb(com->int_id_port) & IIR_IMASK) 168651078Speter != IIR_NOPEND) { 168751078Speter siointr1(com); 168851078Speter possibly_more_intrs = TRUE; 168951078Speter } 169051078Speter /* XXX COM_UNLOCK(); */ 169151078Speter } 169251078Speter } while (possibly_more_intrs); 169351078Speter COM_UNLOCK(); 169451078Speter#endif /* COM_MULTIPORT */ 169551078Speter} 169651078Speter 169751078Speterstatic void 169851078Spetersiointr1(com) 169951078Speter struct com_s *com; 170051078Speter{ 170151078Speter u_char line_status; 170251078Speter u_char modem_status; 170351078Speter u_char *ioptr; 170451078Speter u_char recv_data; 170551078Speter u_char int_ctl; 170651078Speter u_char int_ctl_new; 170751078Speter struct timecounter *tc; 170851078Speter u_int count; 170951078Speter 171051078Speter int_ctl = inb(com->intr_ctl_port); 171151078Speter int_ctl_new = int_ctl; 171251078Speter 171351078Speter while (!com->gone) { 171451078Speter if (com->pps.ppsparam.mode & PPS_CAPTUREBOTH) { 171551078Speter modem_status = inb(com->modem_status_port); 171651078Speter if ((modem_status ^ com->last_modem_status) & MSR_DCD) { 171751078Speter tc = timecounter; 171851078Speter count = tc->tc_get_timecount(tc); 171951078Speter pps_event(&com->pps, tc, count, 172051078Speter (modem_status & MSR_DCD) ? 172151078Speter PPS_CAPTUREASSERT : PPS_CAPTURECLEAR); 172251078Speter } 172351078Speter } 172451078Speter line_status = inb(com->line_status_port); 172551078Speter 172651078Speter /* input event? (check first to help avoid overruns) */ 172751078Speter while (line_status & LSR_RCV_MASK) { 172851078Speter /* break/unnattached error bits or real input? */ 172951078Speter if (!(line_status & LSR_RXRDY)) 173051078Speter recv_data = 0; 173151078Speter else 173251078Speter recv_data = inb(com->data_port); 173351078Speter if (line_status & (LSR_BI | LSR_FE | LSR_PE)) { 173451078Speter /* 173551078Speter * Don't store BI if IGNBRK or FE/PE if IGNPAR. 173651078Speter * Otherwise, push the work to a higher level 173751078Speter * (to handle PARMRK) if we're bypassing. 173851078Speter * Otherwise, convert BI/FE and PE+INPCK to 0. 173951078Speter * 174051078Speter * This makes bypassing work right in the 174151078Speter * usual "raw" case (IGNBRK set, and IGNPAR 174251078Speter * and INPCK clear). 174351078Speter * 174451078Speter * Note: BI together with FE/PE means just BI. 174551078Speter */ 174651078Speter if (line_status & LSR_BI) { 174751078Speter#if defined(DDB) && defined(BREAK_TO_DEBUGGER) 174851078Speter if (com->unit == comconsole) { 174951078Speter breakpoint(); 175051078Speter goto cont; 175151078Speter } 175251078Speter#endif 175351078Speter if (com->tp == NULL 175451078Speter || com->tp->t_iflag & IGNBRK) 175551078Speter goto cont; 175651078Speter } else { 175751078Speter if (com->tp == NULL 175851078Speter || com->tp->t_iflag & IGNPAR) 175951078Speter goto cont; 176051078Speter } 176151078Speter if (com->tp->t_state & TS_CAN_BYPASS_L_RINT 176251078Speter && (line_status & (LSR_BI | LSR_FE) 176351078Speter || com->tp->t_iflag & INPCK)) 176451078Speter recv_data = 0; 176551078Speter } 176651078Speter ++com->bytes_in; 176751078Speter if (com->hotchar != 0 && recv_data == com->hotchar) 176851078Speter setsofttty(); 176951078Speter ioptr = com->iptr; 177051078Speter if (ioptr >= com->ibufend) 177151078Speter CE_RECORD(com, CE_INTERRUPT_BUF_OVERFLOW); 177251078Speter else { 177351078Speter if (com->do_timestamp) 177451078Speter microtime(&com->timestamp); 177551078Speter ++com_events; 177651078Speter schedsofttty(); 177751078Speter#if 0 /* for testing input latency vs efficiency */ 177851078Speterif (com->iptr - com->ibuf == 8) 177951078Speter setsofttty(); 178051078Speter#endif 178151078Speter ioptr[0] = recv_data; 178251078Speter ioptr[com->ierroff] = line_status; 178351078Speter com->iptr = ++ioptr; 178451078Speter if (ioptr == com->ihighwater 178551078Speter && com->state & CS_RTS_IFLOW) 178651078Speter outb(com->modem_ctl_port, 178751078Speter com->mcr_image &= ~MCR_RTS); 178851078Speter if (line_status & LSR_OE) 178951078Speter CE_RECORD(com, CE_OVERRUN); 179051078Speter } 179151078Spetercont: 179251078Speter /* 179351078Speter * "& 0x7F" is to avoid the gcc-1.40 generating a slow 179451078Speter * jump from the top of the loop to here 179551078Speter */ 179651078Speter line_status = inb(com->line_status_port) & 0x7F; 179751078Speter } 179851078Speter 179951078Speter /* modem status change? (always check before doing output) */ 180051078Speter modem_status = inb(com->modem_status_port); 180151078Speter if (modem_status != com->last_modem_status) { 180251078Speter if (com->do_dcd_timestamp 180351078Speter && !(com->last_modem_status & MSR_DCD) 180451078Speter && modem_status & MSR_DCD) 180551078Speter microtime(&com->dcd_timestamp); 180651078Speter 180751078Speter /* 180851078Speter * Schedule high level to handle DCD changes. Note 180951078Speter * that we don't use the delta bits anywhere. Some 181051078Speter * UARTs mess them up, and it's easy to remember the 181151078Speter * previous bits and calculate the delta. 181251078Speter */ 181351078Speter com->last_modem_status = modem_status; 181451078Speter if (!(com->state & CS_CHECKMSR)) { 181551078Speter com_events += LOTS_OF_EVENTS; 181651078Speter com->state |= CS_CHECKMSR; 181751078Speter setsofttty(); 181851078Speter } 181951078Speter 182051078Speter /* handle CTS change immediately for crisp flow ctl */ 182151078Speter if (com->state & CS_CTS_OFLOW) { 182251078Speter if (modem_status & MSR_CTS) 182351078Speter com->state |= CS_ODEVREADY; 182451078Speter else 182551078Speter com->state &= ~CS_ODEVREADY; 182651078Speter } 182751078Speter } 182851078Speter 182951078Speter /* output queued and everything ready? */ 183051078Speter if (line_status & LSR_TXRDY 183151078Speter && com->state >= (CS_BUSY | CS_TTGO | CS_ODEVREADY)) { 183251078Speter ioptr = com->obufq.l_head; 183351078Speter if (com->tx_fifo_size > 1) { 183451078Speter u_int ocount; 183551078Speter 183651078Speter ocount = com->obufq.l_tail - ioptr; 183751078Speter if (ocount > com->tx_fifo_size) 183851078Speter ocount = com->tx_fifo_size; 183951078Speter com->bytes_out += ocount; 184051078Speter do 184151078Speter outb(com->data_port, *ioptr++); 184251078Speter while (--ocount != 0); 184351078Speter } else { 184451078Speter outb(com->data_port, *ioptr++); 184551078Speter ++com->bytes_out; 184651078Speter } 184751078Speter com->obufq.l_head = ioptr; 184851078Speter if (COM_IIR_TXRDYBUG(com->flags)) { 184951078Speter int_ctl_new = int_ctl | IER_ETXRDY; 185051078Speter } 185151078Speter if (ioptr >= com->obufq.l_tail) { 185251078Speter struct lbq *qp; 185351078Speter 185451078Speter qp = com->obufq.l_next; 185551078Speter qp->l_queued = FALSE; 185651078Speter qp = qp->l_next; 185751078Speter if (qp != NULL) { 185851078Speter com->obufq.l_head = qp->l_head; 185951078Speter com->obufq.l_tail = qp->l_tail; 186051078Speter com->obufq.l_next = qp; 186151078Speter } else { 186251078Speter /* output just completed */ 186353344Speter if (COM_IIR_TXRDYBUG(com->flags)) { 186451078Speter int_ctl_new = int_ctl & ~IER_ETXRDY; 186551078Speter } 186651078Speter com->state &= ~CS_BUSY; 186751078Speter } 186851078Speter if (!(com->state & CS_ODONE)) { 186951078Speter com_events += LOTS_OF_EVENTS; 187051078Speter com->state |= CS_ODONE; 187151078Speter setsofttty(); /* handle at high level ASAP */ 187251078Speter } 187351078Speter } 187453344Speter if (COM_IIR_TXRDYBUG(com->flags) && (int_ctl != int_ctl_new)) { 187551078Speter outb(com->intr_ctl_port, int_ctl_new); 187651078Speter } 187751078Speter } 187851078Speter 187951078Speter /* finished? */ 188051078Speter#ifndef COM_MULTIPORT 188151078Speter if ((inb(com->int_id_port) & IIR_IMASK) == IIR_NOPEND) 188251078Speter#endif /* COM_MULTIPORT */ 188351078Speter return; 188451078Speter } 188551078Speter} 188651078Speter 188751078Speterstatic int 188851078Spetersioioctl(dev, cmd, data, flag, p) 188951078Speter dev_t dev; 189051078Speter u_long cmd; 189151078Speter caddr_t data; 189251078Speter int flag; 189351078Speter struct proc *p; 189451078Speter{ 189551078Speter struct com_s *com; 189651078Speter int error; 189751078Speter Port_t iobase; 189851078Speter int mynor; 189951078Speter int s; 190051078Speter struct tty *tp; 190151078Speter#if defined(COMPAT_43) || defined(COMPAT_SUNOS) 190251078Speter u_long oldcmd; 190351078Speter struct termios term; 190451078Speter#endif 190551078Speter 190651078Speter mynor = minor(dev); 190751078Speter com = com_addr(MINOR_TO_UNIT(mynor)); 190851078Speter if (com->gone) 190951078Speter return (ENODEV); 191051078Speter iobase = com->iobase; 191151078Speter if (mynor & CONTROL_MASK) { 191251078Speter struct termios *ct; 191351078Speter 191451078Speter switch (mynor & CONTROL_MASK) { 191551078Speter case CONTROL_INIT_STATE: 191651078Speter ct = mynor & CALLOUT_MASK ? &com->it_out : &com->it_in; 191751078Speter break; 191851078Speter case CONTROL_LOCK_STATE: 191951078Speter ct = mynor & CALLOUT_MASK ? &com->lt_out : &com->lt_in; 192051078Speter break; 192151078Speter default: 192251078Speter return (ENODEV); /* /dev/nodev */ 192351078Speter } 192451078Speter switch (cmd) { 192551078Speter case TIOCSETA: 192651078Speter error = suser(p); 192751078Speter if (error != 0) 192851078Speter return (error); 192951078Speter *ct = *(struct termios *)data; 193051078Speter return (0); 193151078Speter case TIOCGETA: 193251078Speter *(struct termios *)data = *ct; 193351078Speter return (0); 193451078Speter case TIOCGETD: 193551078Speter *(int *)data = TTYDISC; 193651078Speter return (0); 193751078Speter case TIOCGWINSZ: 193851078Speter bzero(data, sizeof(struct winsize)); 193951078Speter return (0); 194051078Speter default: 194151078Speter return (ENOTTY); 194251078Speter } 194351078Speter } 194451078Speter tp = com->tp; 194551078Speter#if defined(COMPAT_43) || defined(COMPAT_SUNOS) 194651078Speter term = tp->t_termios; 194751078Speter oldcmd = cmd; 194851078Speter error = ttsetcompat(tp, &cmd, data, &term); 194951078Speter if (error != 0) 195051078Speter return (error); 195151078Speter if (cmd != oldcmd) 195251078Speter data = (caddr_t)&term; 195351078Speter#endif 195451078Speter if (cmd == TIOCSETA || cmd == TIOCSETAW || cmd == TIOCSETAF) { 195551078Speter int cc; 195651078Speter struct termios *dt = (struct termios *)data; 195751078Speter struct termios *lt = mynor & CALLOUT_MASK 195851078Speter ? &com->lt_out : &com->lt_in; 195951078Speter 196051078Speter dt->c_iflag = (tp->t_iflag & lt->c_iflag) 196151078Speter | (dt->c_iflag & ~lt->c_iflag); 196251078Speter dt->c_oflag = (tp->t_oflag & lt->c_oflag) 196351078Speter | (dt->c_oflag & ~lt->c_oflag); 196451078Speter dt->c_cflag = (tp->t_cflag & lt->c_cflag) 196551078Speter | (dt->c_cflag & ~lt->c_cflag); 196651078Speter dt->c_lflag = (tp->t_lflag & lt->c_lflag) 196751078Speter | (dt->c_lflag & ~lt->c_lflag); 196851078Speter for (cc = 0; cc < NCCS; ++cc) 196951078Speter if (lt->c_cc[cc] != 0) 197051078Speter dt->c_cc[cc] = tp->t_cc[cc]; 197151078Speter if (lt->c_ispeed != 0) 197251078Speter dt->c_ispeed = tp->t_ispeed; 197351078Speter if (lt->c_ospeed != 0) 197451078Speter dt->c_ospeed = tp->t_ospeed; 197551078Speter } 197651078Speter error = (*linesw[tp->t_line].l_ioctl)(tp, cmd, data, flag, p); 197751078Speter if (error != ENOIOCTL) 197851078Speter return (error); 197951078Speter s = spltty(); 198051078Speter error = ttioctl(tp, cmd, data, flag); 198151078Speter disc_optim(tp, &tp->t_termios, com); 198251078Speter if (error != ENOIOCTL) { 198351078Speter splx(s); 198451078Speter return (error); 198551078Speter } 198651078Speter switch (cmd) { 198751078Speter case TIOCSBRK: 198851078Speter outb(iobase + com_cfcr, com->cfcr_image |= CFCR_SBREAK); 198951078Speter break; 199051078Speter case TIOCCBRK: 199151078Speter outb(iobase + com_cfcr, com->cfcr_image &= ~CFCR_SBREAK); 199251078Speter break; 199351078Speter case TIOCSDTR: 199451078Speter (void)commctl(com, TIOCM_DTR, DMBIS); 199551078Speter break; 199651078Speter case TIOCCDTR: 199751078Speter (void)commctl(com, TIOCM_DTR, DMBIC); 199851078Speter break; 199951078Speter /* 200051078Speter * XXX should disallow changing MCR_RTS if CS_RTS_IFLOW is set. The 200151078Speter * changes get undone on the next call to comparam(). 200251078Speter */ 200351078Speter case TIOCMSET: 200451078Speter (void)commctl(com, *(int *)data, DMSET); 200551078Speter break; 200651078Speter case TIOCMBIS: 200751078Speter (void)commctl(com, *(int *)data, DMBIS); 200851078Speter break; 200951078Speter case TIOCMBIC: 201051078Speter (void)commctl(com, *(int *)data, DMBIC); 201151078Speter break; 201251078Speter case TIOCMGET: 201351078Speter *(int *)data = commctl(com, 0, DMGET); 201451078Speter break; 201551078Speter case TIOCMSDTRWAIT: 201651078Speter /* must be root since the wait applies to following logins */ 201751078Speter error = suser(p); 201851078Speter if (error != 0) { 201951078Speter splx(s); 202051078Speter return (error); 202151078Speter } 202251078Speter com->dtr_wait = *(int *)data * hz / 100; 202351078Speter break; 202451078Speter case TIOCMGDTRWAIT: 202551078Speter *(int *)data = com->dtr_wait * 100 / hz; 202651078Speter break; 202751078Speter case TIOCTIMESTAMP: 202851078Speter com->do_timestamp = TRUE; 202951078Speter *(struct timeval *)data = com->timestamp; 203051078Speter break; 203151078Speter case TIOCDCDTIMESTAMP: 203251078Speter com->do_dcd_timestamp = TRUE; 203351078Speter *(struct timeval *)data = com->dcd_timestamp; 203451078Speter break; 203551078Speter default: 203651078Speter splx(s); 203751078Speter error = pps_ioctl(cmd, data, &com->pps); 203851078Speter if (error == ENODEV) 203951078Speter error = ENOTTY; 204051078Speter return (error); 204151078Speter } 204251078Speter splx(s); 204351078Speter return (0); 204451078Speter} 204551078Speter 204651078Speterstatic void 204751078Spetersiopoll() 204851078Speter{ 204951078Speter int unit; 205051078Speter 205151078Speter if (com_events == 0) 205251078Speter return; 205351078Speterrepeat: 205453344Speter for (unit = 0; unit < sio_numunits; ++unit) { 205551078Speter struct com_s *com; 205651078Speter int incc; 205751078Speter struct tty *tp; 205851078Speter 205951078Speter com = com_addr(unit); 206051078Speter if (com == NULL) 206151078Speter continue; 206251078Speter tp = com->tp; 206351078Speter if (tp == NULL || com->gone) { 206451078Speter /* 206551078Speter * Discard any events related to never-opened or 206651078Speter * going-away devices. 206751078Speter */ 206851078Speter disable_intr(); 206951078Speter incc = com->iptr - com->ibuf; 207051078Speter com->iptr = com->ibuf; 207151078Speter if (com->state & CS_CHECKMSR) { 207251078Speter incc += LOTS_OF_EVENTS; 207351078Speter com->state &= ~CS_CHECKMSR; 207451078Speter } 207551078Speter com_events -= incc; 207651078Speter enable_intr(); 207751078Speter continue; 207851078Speter } 207951078Speter if (com->iptr != com->ibuf) { 208051078Speter disable_intr(); 208151078Speter sioinput(com); 208251078Speter enable_intr(); 208351078Speter } 208451078Speter if (com->state & CS_CHECKMSR) { 208551078Speter u_char delta_modem_status; 208651078Speter 208751078Speter disable_intr(); 208851078Speter delta_modem_status = com->last_modem_status 208951078Speter ^ com->prev_modem_status; 209051078Speter com->prev_modem_status = com->last_modem_status; 209151078Speter com_events -= LOTS_OF_EVENTS; 209251078Speter com->state &= ~CS_CHECKMSR; 209351078Speter enable_intr(); 209451078Speter if (delta_modem_status & MSR_DCD) 209551078Speter (*linesw[tp->t_line].l_modem) 209651078Speter (tp, com->prev_modem_status & MSR_DCD); 209751078Speter } 209851078Speter if (com->state & CS_ODONE) { 209951078Speter disable_intr(); 210051078Speter com_events -= LOTS_OF_EVENTS; 210151078Speter com->state &= ~CS_ODONE; 210251078Speter enable_intr(); 210351078Speter if (!(com->state & CS_BUSY) 210451078Speter && !(com->extra_state & CSE_BUSYCHECK)) { 210551078Speter timeout(siobusycheck, com, hz / 100); 210651078Speter com->extra_state |= CSE_BUSYCHECK; 210751078Speter } 210851078Speter (*linesw[tp->t_line].l_start)(tp); 210951078Speter } 211051078Speter if (com_events == 0) 211151078Speter break; 211251078Speter } 211351078Speter if (com_events >= LOTS_OF_EVENTS) 211451078Speter goto repeat; 211551078Speter} 211651078Speter 211751078Speterstatic int 211851078Spetercomparam(tp, t) 211951078Speter struct tty *tp; 212051078Speter struct termios *t; 212151078Speter{ 212251078Speter u_int cfcr; 212351078Speter int cflag; 212451078Speter struct com_s *com; 212551078Speter int divisor; 212651078Speter u_char dlbh; 212751078Speter u_char dlbl; 212851078Speter Port_t iobase; 212951078Speter int s; 213051078Speter int unit; 213151078Speter 213251078Speter /* do historical conversions */ 213351078Speter if (t->c_ispeed == 0) 213451078Speter t->c_ispeed = t->c_ospeed; 213551078Speter 213651078Speter /* check requested parameters */ 213751078Speter divisor = ttspeedtab(t->c_ospeed, comspeedtab); 213851078Speter if (divisor < 0 || (divisor > 0 && t->c_ispeed != t->c_ospeed)) 213951078Speter return (EINVAL); 214051078Speter 214151078Speter /* parameters are OK, convert them to the com struct and the device */ 214251078Speter unit = DEV_TO_UNIT(tp->t_dev); 214351078Speter com = com_addr(unit); 214451078Speter iobase = com->iobase; 214551078Speter s = spltty(); 214651078Speter if (divisor == 0) 214751078Speter (void)commctl(com, TIOCM_DTR, DMBIC); /* hang up line */ 214851078Speter else 214951078Speter (void)commctl(com, TIOCM_DTR, DMBIS); 215051078Speter cflag = t->c_cflag; 215151078Speter switch (cflag & CSIZE) { 215251078Speter case CS5: 215351078Speter cfcr = CFCR_5BITS; 215451078Speter break; 215551078Speter case CS6: 215651078Speter cfcr = CFCR_6BITS; 215751078Speter break; 215851078Speter case CS7: 215951078Speter cfcr = CFCR_7BITS; 216051078Speter break; 216151078Speter default: 216251078Speter cfcr = CFCR_8BITS; 216351078Speter break; 216451078Speter } 216551078Speter if (cflag & PARENB) { 216651078Speter cfcr |= CFCR_PENAB; 216751078Speter if (!(cflag & PARODD)) 216851078Speter cfcr |= CFCR_PEVEN; 216951078Speter } 217051078Speter if (cflag & CSTOPB) 217151078Speter cfcr |= CFCR_STOPB; 217251078Speter 217351078Speter if (com->hasfifo && divisor != 0) { 217451078Speter /* 217551078Speter * Use a fifo trigger level low enough so that the input 217651078Speter * latency from the fifo is less than about 16 msec and 217751078Speter * the total latency is less than about 30 msec. These 217851078Speter * latencies are reasonable for humans. Serial comms 217951078Speter * protocols shouldn't expect anything better since modem 218051078Speter * latencies are larger. 218151078Speter */ 218251078Speter com->fifo_image = t->c_ospeed <= 4800 218351078Speter ? FIFO_ENABLE : FIFO_ENABLE | FIFO_RX_HIGH; 218451078Speter#ifdef COM_ESP 218551078Speter /* 218651078Speter * The Hayes ESP card needs the fifo DMA mode bit set 218751078Speter * in compatibility mode. If not, it will interrupt 218851078Speter * for each character received. 218951078Speter */ 219051078Speter if (com->esp) 219151078Speter com->fifo_image |= FIFO_DMA_MODE; 219251078Speter#endif 219351078Speter outb(iobase + com_fifo, com->fifo_image); 219451078Speter } 219551078Speter 219651078Speter /* 219751078Speter * This returns with interrupts disabled so that we can complete 219851078Speter * the speed change atomically. Keeping interrupts disabled is 219951078Speter * especially important while com_data is hidden. 220051078Speter */ 220151078Speter (void) siosetwater(com, t->c_ispeed); 220251078Speter 220351078Speter if (divisor != 0) { 220451078Speter outb(iobase + com_cfcr, cfcr | CFCR_DLAB); 220551078Speter /* 220651078Speter * Only set the divisor registers if they would change, 220751078Speter * since on some 16550 incompatibles (UMC8669F), setting 220851078Speter * them while input is arriving them loses sync until 220951078Speter * data stops arriving. 221051078Speter */ 221151078Speter dlbl = divisor & 0xFF; 221251078Speter if (inb(iobase + com_dlbl) != dlbl) 221351078Speter outb(iobase + com_dlbl, dlbl); 221451078Speter dlbh = (u_int) divisor >> 8; 221551078Speter if (inb(iobase + com_dlbh) != dlbh) 221651078Speter outb(iobase + com_dlbh, dlbh); 221751078Speter } 221851078Speter 221951078Speter 222051078Speter outb(iobase + com_cfcr, com->cfcr_image = cfcr); 222151078Speter 222251078Speter if (!(tp->t_state & TS_TTSTOP)) 222351078Speter com->state |= CS_TTGO; 222451078Speter 222551078Speter if (cflag & CRTS_IFLOW) { 222651078Speter if (com->st16650a) { 222751078Speter outb(iobase + com_cfcr, 0xbf); 222851078Speter outb(iobase + com_fifo, inb(iobase + com_fifo) | 0x40); 222951078Speter } 223051078Speter com->state |= CS_RTS_IFLOW; 223151078Speter /* 223251078Speter * If CS_RTS_IFLOW just changed from off to on, the change 223351078Speter * needs to be propagated to MCR_RTS. This isn't urgent, 223451078Speter * so do it later by calling comstart() instead of repeating 223551078Speter * a lot of code from comstart() here. 223651078Speter */ 223751078Speter } else if (com->state & CS_RTS_IFLOW) { 223851078Speter com->state &= ~CS_RTS_IFLOW; 223951078Speter /* 224051078Speter * CS_RTS_IFLOW just changed from on to off. Force MCR_RTS 224151078Speter * on here, since comstart() won't do it later. 224251078Speter */ 224351078Speter outb(com->modem_ctl_port, com->mcr_image |= MCR_RTS); 224451078Speter if (com->st16650a) { 224551078Speter outb(iobase + com_cfcr, 0xbf); 224651078Speter outb(iobase + com_fifo, inb(iobase + com_fifo) & ~0x40); 224751078Speter } 224851078Speter } 224951078Speter 225051078Speter 225151078Speter /* 225251078Speter * Set up state to handle output flow control. 225351078Speter * XXX - worth handling MDMBUF (DCD) flow control at the lowest level? 225451078Speter * Now has 10+ msec latency, while CTS flow has 50- usec latency. 225551078Speter */ 225651078Speter com->state |= CS_ODEVREADY; 225751078Speter com->state &= ~CS_CTS_OFLOW; 225851078Speter if (cflag & CCTS_OFLOW) { 225951078Speter com->state |= CS_CTS_OFLOW; 226051078Speter if (!(com->last_modem_status & MSR_CTS)) 226151078Speter com->state &= ~CS_ODEVREADY; 226251078Speter if (com->st16650a) { 226351078Speter outb(iobase + com_cfcr, 0xbf); 226451078Speter outb(iobase + com_fifo, inb(iobase + com_fifo) | 0x80); 226551078Speter } 226651078Speter } else { 226751078Speter if (com->st16650a) { 226851078Speter outb(iobase + com_cfcr, 0xbf); 226951078Speter outb(iobase + com_fifo, inb(iobase + com_fifo) & ~0x80); 227051078Speter } 227151078Speter } 227251078Speter 227351078Speter 227451078Speter outb(iobase + com_cfcr, com->cfcr_image); 227551078Speter 227651078Speter 227751078Speter /* XXX shouldn't call functions while intrs are disabled. */ 227851078Speter disc_optim(tp, t, com); 227951078Speter /* 228051078Speter * Recover from fiddling with CS_TTGO. We used to call siointr1() 228151078Speter * unconditionally, but that defeated the careful discarding of 228251078Speter * stale input in sioopen(). 228351078Speter */ 228451078Speter if (com->state >= (CS_BUSY | CS_TTGO)) 228551078Speter siointr1(com); 228651078Speter 228751078Speter enable_intr(); 228851078Speter splx(s); 228951078Speter comstart(tp); 229051078Speter if (com->ibufold != NULL) { 229151078Speter free(com->ibufold, M_DEVBUF); 229251078Speter com->ibufold = NULL; 229351078Speter } 229451078Speter return (0); 229551078Speter} 229651078Speter 229751078Speterstatic int 229851078Spetersiosetwater(com, speed) 229951078Speter struct com_s *com; 230051078Speter speed_t speed; 230151078Speter{ 230251078Speter int cp4ticks; 230351078Speter u_char *ibuf; 230451078Speter int ibufsize; 230551078Speter struct tty *tp; 230651078Speter 230751078Speter /* 230851078Speter * Make the buffer size large enough to handle a softtty interrupt 230951078Speter * latency of about 2 ticks without loss of throughput or data 231051078Speter * (about 3 ticks if input flow control is not used or not honoured, 231151078Speter * but a bit less for CS5-CS7 modes). 231251078Speter */ 231351078Speter cp4ticks = speed / 10 / hz * 4; 231451078Speter for (ibufsize = 128; ibufsize < cp4ticks;) 231551078Speter ibufsize <<= 1; 231651078Speter if (ibufsize == com->ibufsize) { 231751078Speter disable_intr(); 231851078Speter return (0); 231951078Speter } 232051078Speter 232151078Speter /* 232251078Speter * Allocate input buffer. The extra factor of 2 in the size is 232351078Speter * to allow for an error byte for each input byte. 232451078Speter */ 232551078Speter ibuf = malloc(2 * ibufsize, M_DEVBUF, M_NOWAIT); 232651078Speter if (ibuf == NULL) { 232751078Speter disable_intr(); 232851078Speter return (ENOMEM); 232951078Speter } 233051078Speter 233151078Speter /* Initialize non-critical variables. */ 233251078Speter com->ibufold = com->ibuf; 233351078Speter com->ibufsize = ibufsize; 233451078Speter tp = com->tp; 233551078Speter if (tp != NULL) { 233651078Speter tp->t_ififosize = 2 * ibufsize; 233751078Speter tp->t_ispeedwat = (speed_t)-1; 233851078Speter tp->t_ospeedwat = (speed_t)-1; 233951078Speter } 234051078Speter 234151078Speter /* 234251078Speter * Read current input buffer, if any. Continue with interrupts 234351078Speter * disabled. 234451078Speter */ 234551078Speter disable_intr(); 234651078Speter if (com->iptr != com->ibuf) 234751078Speter sioinput(com); 234851078Speter 234951078Speter /*- 235051078Speter * Initialize critical variables, including input buffer watermarks. 235151078Speter * The external device is asked to stop sending when the buffer 235251078Speter * exactly reaches high water, or when the high level requests it. 235351078Speter * The high level is notified immediately (rather than at a later 235451078Speter * clock tick) when this watermark is reached. 235551078Speter * The buffer size is chosen so the watermark should almost never 235651078Speter * be reached. 235751078Speter * The low watermark is invisibly 0 since the buffer is always 235851078Speter * emptied all at once. 235951078Speter */ 236051078Speter com->iptr = com->ibuf = ibuf; 236151078Speter com->ibufend = ibuf + ibufsize; 236251078Speter com->ierroff = ibufsize; 236351078Speter com->ihighwater = ibuf + 3 * ibufsize / 4; 236451078Speter return (0); 236551078Speter} 236651078Speter 236751078Speterstatic void 236851078Spetercomstart(tp) 236951078Speter struct tty *tp; 237051078Speter{ 237151078Speter struct com_s *com; 237251078Speter int s; 237351078Speter int unit; 237451078Speter 237551078Speter unit = DEV_TO_UNIT(tp->t_dev); 237651078Speter com = com_addr(unit); 237751078Speter s = spltty(); 237851078Speter disable_intr(); 237951078Speter if (tp->t_state & TS_TTSTOP) 238051078Speter com->state &= ~CS_TTGO; 238151078Speter else 238251078Speter com->state |= CS_TTGO; 238351078Speter if (tp->t_state & TS_TBLOCK) { 238451078Speter if (com->mcr_image & MCR_RTS && com->state & CS_RTS_IFLOW) 238551078Speter outb(com->modem_ctl_port, com->mcr_image &= ~MCR_RTS); 238651078Speter } else { 238751078Speter if (!(com->mcr_image & MCR_RTS) && com->iptr < com->ihighwater 238851078Speter && com->state & CS_RTS_IFLOW) 238951078Speter outb(com->modem_ctl_port, com->mcr_image |= MCR_RTS); 239051078Speter } 239151078Speter enable_intr(); 239251078Speter if (tp->t_state & (TS_TIMEOUT | TS_TTSTOP)) { 239351078Speter ttwwakeup(tp); 239451078Speter splx(s); 239551078Speter return; 239651078Speter } 239751078Speter if (tp->t_outq.c_cc != 0) { 239851078Speter struct lbq *qp; 239951078Speter struct lbq *next; 240051078Speter 240151078Speter if (!com->obufs[0].l_queued) { 240251078Speter com->obufs[0].l_tail 240351078Speter = com->obuf1 + q_to_b(&tp->t_outq, com->obuf1, 240451078Speter sizeof com->obuf1); 240551078Speter com->obufs[0].l_next = NULL; 240651078Speter com->obufs[0].l_queued = TRUE; 240751078Speter disable_intr(); 240851078Speter if (com->state & CS_BUSY) { 240951078Speter qp = com->obufq.l_next; 241051078Speter while ((next = qp->l_next) != NULL) 241151078Speter qp = next; 241251078Speter qp->l_next = &com->obufs[0]; 241351078Speter } else { 241451078Speter com->obufq.l_head = com->obufs[0].l_head; 241551078Speter com->obufq.l_tail = com->obufs[0].l_tail; 241651078Speter com->obufq.l_next = &com->obufs[0]; 241751078Speter com->state |= CS_BUSY; 241851078Speter } 241951078Speter enable_intr(); 242051078Speter } 242151078Speter if (tp->t_outq.c_cc != 0 && !com->obufs[1].l_queued) { 242251078Speter com->obufs[1].l_tail 242351078Speter = com->obuf2 + q_to_b(&tp->t_outq, com->obuf2, 242451078Speter sizeof com->obuf2); 242551078Speter com->obufs[1].l_next = NULL; 242651078Speter com->obufs[1].l_queued = TRUE; 242751078Speter disable_intr(); 242851078Speter if (com->state & CS_BUSY) { 242951078Speter qp = com->obufq.l_next; 243051078Speter while ((next = qp->l_next) != NULL) 243151078Speter qp = next; 243251078Speter qp->l_next = &com->obufs[1]; 243351078Speter } else { 243451078Speter com->obufq.l_head = com->obufs[1].l_head; 243551078Speter com->obufq.l_tail = com->obufs[1].l_tail; 243651078Speter com->obufq.l_next = &com->obufs[1]; 243751078Speter com->state |= CS_BUSY; 243851078Speter } 243951078Speter enable_intr(); 244051078Speter } 244151078Speter tp->t_state |= TS_BUSY; 244251078Speter } 244351078Speter disable_intr(); 244451078Speter if (com->state >= (CS_BUSY | CS_TTGO)) 244551078Speter siointr1(com); /* fake interrupt to start output */ 244651078Speter enable_intr(); 244751078Speter ttwwakeup(tp); 244851078Speter splx(s); 244951078Speter} 245051078Speter 245151078Speterstatic void 245251654Sphkcomstop(tp, rw) 245351078Speter struct tty *tp; 245451078Speter int rw; 245551078Speter{ 245651078Speter struct com_s *com; 245751078Speter 245851078Speter com = com_addr(DEV_TO_UNIT(tp->t_dev)); 245951078Speter if (com->gone) 246051078Speter return; 246151078Speter disable_intr(); 246251078Speter if (rw & FWRITE) { 246351078Speter if (com->hasfifo) 246451078Speter#ifdef COM_ESP 246551078Speter /* XXX avoid h/w bug. */ 246651078Speter if (!com->esp) 246751078Speter#endif 246851078Speter outb(com->iobase + com_fifo, 246951078Speter FIFO_XMT_RST | com->fifo_image); 247051078Speter com->obufs[0].l_queued = FALSE; 247151078Speter com->obufs[1].l_queued = FALSE; 247251078Speter if (com->state & CS_ODONE) 247351078Speter com_events -= LOTS_OF_EVENTS; 247451078Speter com->state &= ~(CS_ODONE | CS_BUSY); 247551078Speter com->tp->t_state &= ~TS_BUSY; 247651078Speter } 247751078Speter if (rw & FREAD) { 247851078Speter if (com->hasfifo) 247951078Speter#ifdef COM_ESP 248051078Speter /* XXX avoid h/w bug. */ 248151078Speter if (!com->esp) 248251078Speter#endif 248351078Speter outb(com->iobase + com_fifo, 248451078Speter FIFO_RCV_RST | com->fifo_image); 248551078Speter com_events -= (com->iptr - com->ibuf); 248651078Speter com->iptr = com->ibuf; 248751078Speter } 248851078Speter enable_intr(); 248951078Speter comstart(tp); 249051078Speter} 249151078Speter 249251078Speterstatic int 249351078Spetercommctl(com, bits, how) 249451078Speter struct com_s *com; 249551078Speter int bits; 249651078Speter int how; 249751078Speter{ 249851078Speter int mcr; 249951078Speter int msr; 250051078Speter 250151078Speter if (how == DMGET) { 250251078Speter bits = TIOCM_LE; /* XXX - always enabled while open */ 250351078Speter mcr = com->mcr_image; 250451078Speter if (mcr & MCR_DTR) 250551078Speter bits |= TIOCM_DTR; 250651078Speter if (mcr & MCR_RTS) 250751078Speter bits |= TIOCM_RTS; 250851078Speter msr = com->prev_modem_status; 250951078Speter if (msr & MSR_CTS) 251051078Speter bits |= TIOCM_CTS; 251151078Speter if (msr & MSR_DCD) 251251078Speter bits |= TIOCM_CD; 251351078Speter if (msr & MSR_DSR) 251451078Speter bits |= TIOCM_DSR; 251551078Speter /* 251651078Speter * XXX - MSR_RI is naturally volatile, and we make MSR_TERI 251751078Speter * more volatile by reading the modem status a lot. Perhaps 251851078Speter * we should latch both bits until the status is read here. 251951078Speter */ 252051078Speter if (msr & (MSR_RI | MSR_TERI)) 252151078Speter bits |= TIOCM_RI; 252251078Speter return (bits); 252351078Speter } 252451078Speter mcr = 0; 252551078Speter if (bits & TIOCM_DTR) 252651078Speter mcr |= MCR_DTR; 252751078Speter if (bits & TIOCM_RTS) 252851078Speter mcr |= MCR_RTS; 252951078Speter if (com->gone) 253051078Speter return(0); 253151078Speter disable_intr(); 253251078Speter switch (how) { 253351078Speter case DMSET: 253451078Speter outb(com->modem_ctl_port, 253551078Speter com->mcr_image = mcr | (com->mcr_image & MCR_IENABLE)); 253651078Speter break; 253751078Speter case DMBIS: 253851078Speter outb(com->modem_ctl_port, com->mcr_image |= mcr); 253951078Speter break; 254051078Speter case DMBIC: 254151078Speter outb(com->modem_ctl_port, com->mcr_image &= ~mcr); 254251078Speter break; 254351078Speter } 254451078Speter enable_intr(); 254551078Speter return (0); 254651078Speter} 254751078Speter 254851078Speterstatic void 254951078Spetersiosettimeout() 255051078Speter{ 255151078Speter struct com_s *com; 255251078Speter bool_t someopen; 255351078Speter int unit; 255451078Speter 255551078Speter /* 255651078Speter * Set our timeout period to 1 second if no polled devices are open. 255751078Speter * Otherwise set it to max(1/200, 1/hz). 255851078Speter * Enable timeouts iff some device is open. 255951078Speter */ 256051078Speter untimeout(comwakeup, (void *)NULL, sio_timeout_handle); 256151078Speter sio_timeout = hz; 256251078Speter someopen = FALSE; 256353344Speter for (unit = 0; unit < sio_numunits; ++unit) { 256451078Speter com = com_addr(unit); 256551078Speter if (com != NULL && com->tp != NULL 256651078Speter && com->tp->t_state & TS_ISOPEN && !com->gone) { 256751078Speter someopen = TRUE; 256851078Speter if (com->poll || com->poll_output) { 256951078Speter sio_timeout = hz > 200 ? hz / 200 : 1; 257051078Speter break; 257151078Speter } 257251078Speter } 257351078Speter } 257451078Speter if (someopen) { 257551078Speter sio_timeouts_until_log = hz / sio_timeout; 257651078Speter sio_timeout_handle = timeout(comwakeup, (void *)NULL, 257751078Speter sio_timeout); 257851078Speter } else { 257951078Speter /* Flush error messages, if any. */ 258051078Speter sio_timeouts_until_log = 1; 258151078Speter comwakeup((void *)NULL); 258251078Speter untimeout(comwakeup, (void *)NULL, sio_timeout_handle); 258351078Speter } 258451078Speter} 258551078Speter 258651078Speterstatic void 258751078Spetercomwakeup(chan) 258851078Speter void *chan; 258951078Speter{ 259051078Speter struct com_s *com; 259151078Speter int unit; 259251078Speter 259351078Speter sio_timeout_handle = timeout(comwakeup, (void *)NULL, sio_timeout); 259451078Speter 259551078Speter /* 259651078Speter * Recover from lost output interrupts. 259751078Speter * Poll any lines that don't use interrupts. 259851078Speter */ 259953344Speter for (unit = 0; unit < sio_numunits; ++unit) { 260051078Speter com = com_addr(unit); 260151078Speter if (com != NULL && !com->gone 260251078Speter && (com->state >= (CS_BUSY | CS_TTGO) || com->poll)) { 260351078Speter disable_intr(); 260451078Speter siointr1(com); 260551078Speter enable_intr(); 260651078Speter } 260751078Speter } 260851078Speter 260951078Speter /* 261051078Speter * Check for and log errors, but not too often. 261151078Speter */ 261251078Speter if (--sio_timeouts_until_log > 0) 261351078Speter return; 261451078Speter sio_timeouts_until_log = hz / sio_timeout; 261553344Speter for (unit = 0; unit < sio_numunits; ++unit) { 261651078Speter int errnum; 261751078Speter 261851078Speter com = com_addr(unit); 261951078Speter if (com == NULL) 262051078Speter continue; 262151078Speter if (com->gone) 262251078Speter continue; 262351078Speter for (errnum = 0; errnum < CE_NTYPES; ++errnum) { 262451078Speter u_int delta; 262551078Speter u_long total; 262651078Speter 262751078Speter disable_intr(); 262851078Speter delta = com->delta_error_counts[errnum]; 262951078Speter com->delta_error_counts[errnum] = 0; 263051078Speter enable_intr(); 263151078Speter if (delta == 0) 263251078Speter continue; 263351078Speter total = com->error_counts[errnum] += delta; 263451078Speter log(LOG_ERR, "sio%d: %u more %s%s (total %lu)\n", 263551078Speter unit, delta, error_desc[errnum], 263651078Speter delta == 1 ? "" : "s", total); 263751078Speter } 263851078Speter } 263951078Speter} 264051078Speter 264151078Speterstatic void 264251078Speterdisc_optim(tp, t, com) 264351078Speter struct tty *tp; 264451078Speter struct termios *t; 264551078Speter struct com_s *com; 264651078Speter{ 264751078Speter if (!(t->c_iflag & (ICRNL | IGNCR | IMAXBEL | INLCR | ISTRIP | IXON)) 264851078Speter && (!(t->c_iflag & BRKINT) || (t->c_iflag & IGNBRK)) 264951078Speter && (!(t->c_iflag & PARMRK) 265051078Speter || (t->c_iflag & (IGNPAR | IGNBRK)) == (IGNPAR | IGNBRK)) 265151078Speter && !(t->c_lflag & (ECHO | ICANON | IEXTEN | ISIG | PENDIN)) 265251078Speter && linesw[tp->t_line].l_rint == ttyinput) 265351078Speter tp->t_state |= TS_CAN_BYPASS_L_RINT; 265451078Speter else 265551078Speter tp->t_state &= ~TS_CAN_BYPASS_L_RINT; 265651078Speter com->hotchar = linesw[tp->t_line].l_hotchar; 265751078Speter} 265851078Speter 265951078Speter/* 266051078Speter * Following are all routines needed for SIO to act as console 266151078Speter */ 266251078Speter#include <sys/cons.h> 266351078Speter 266451078Speterstruct siocnstate { 266551078Speter u_char dlbl; 266651078Speter u_char dlbh; 266751078Speter u_char ier; 266851078Speter u_char cfcr; 266951078Speter u_char mcr; 267051078Speter}; 267151078Speter 267251078Speterstatic speed_t siocngetspeed __P((Port_t, struct speedtab *)); 267351078Speterstatic void siocnclose __P((struct siocnstate *sp, Port_t iobase)); 267451078Speterstatic void siocnopen __P((struct siocnstate *sp, Port_t iobase, int speed)); 267551078Speterstatic void siocntxwait __P((Port_t iobase)); 267651078Speter 267751078Speterstatic cn_probe_t siocnprobe; 267851078Speterstatic cn_init_t siocninit; 267951078Speterstatic cn_checkc_t siocncheckc; 268051078Speterstatic cn_getc_t siocngetc; 268151078Speterstatic cn_putc_t siocnputc; 268251078Speter 268351078Speter#ifdef __i386__ 268451078SpeterCONS_DRIVER(sio, siocnprobe, siocninit, NULL, siocngetc, siocncheckc, siocnputc); 268551078Speter 268651078Speter#endif 268751078Speter 268851078Speter/* To get the GDB related variables */ 268951078Speter#if DDB > 0 269051078Speter#include <ddb/ddb.h> 269151078Speter#endif 269251078Speter 269351078Speterstatic void 269451078Spetersiocntxwait(iobase) 269551078Speter Port_t iobase; 269651078Speter{ 269751078Speter int timo; 269851078Speter 269951078Speter /* 270051078Speter * Wait for any pending transmission to finish. Required to avoid 270151078Speter * the UART lockup bug when the speed is changed, and for normal 270251078Speter * transmits. 270351078Speter */ 270451078Speter timo = 100000; 270551078Speter while ((inb(iobase + com_lsr) & (LSR_TSRE | LSR_TXRDY)) 270651078Speter != (LSR_TSRE | LSR_TXRDY) && --timo != 0) 270751078Speter ; 270851078Speter} 270951078Speter 271051078Speter/* 271151078Speter * Read the serial port specified and try to figure out what speed 271251078Speter * it's currently running at. We're assuming the serial port has 271351078Speter * been initialized and is basicly idle. This routine is only intended 271451078Speter * to be run at system startup. 271551078Speter * 271651078Speter * If the value read from the serial port doesn't make sense, return 0. 271751078Speter */ 271851078Speter 271951078Speterstatic speed_t 272051078Spetersiocngetspeed(iobase, table) 272151078Speter Port_t iobase; 272251078Speter struct speedtab *table; 272351078Speter{ 272451078Speter int code; 272551078Speter u_char dlbh; 272651078Speter u_char dlbl; 272751078Speter u_char cfcr; 272851078Speter 272951078Speter cfcr = inb(iobase + com_cfcr); 273051078Speter outb(iobase + com_cfcr, CFCR_DLAB | cfcr); 273151078Speter 273251078Speter dlbl = inb(iobase + com_dlbl); 273351078Speter dlbh = inb(iobase + com_dlbh); 273451078Speter 273551078Speter outb(iobase + com_cfcr, cfcr); 273651078Speter 273751078Speter code = dlbh << 8 | dlbl; 273851078Speter 273953344Speter for (; table->sp_speed != -1; table++) 274051078Speter if (table->sp_code == code) 274151078Speter return (table->sp_speed); 274251078Speter 274351078Speter return 0; /* didn't match anything sane */ 274451078Speter} 274551078Speter 274651078Speterstatic void 274751078Spetersiocnopen(sp, iobase, speed) 274851078Speter struct siocnstate *sp; 274951078Speter Port_t iobase; 275051078Speter int speed; 275151078Speter{ 275251078Speter int divisor; 275351078Speter u_char dlbh; 275451078Speter u_char dlbl; 275551078Speter 275651078Speter /* 275751078Speter * Save all the device control registers except the fifo register 275851078Speter * and set our default ones (cs8 -parenb speed=comdefaultrate). 275951078Speter * We can't save the fifo register since it is read-only. 276051078Speter */ 276151078Speter sp->ier = inb(iobase + com_ier); 276251078Speter outb(iobase + com_ier, 0); /* spltty() doesn't stop siointr() */ 276351078Speter siocntxwait(iobase); 276451078Speter sp->cfcr = inb(iobase + com_cfcr); 276551078Speter outb(iobase + com_cfcr, CFCR_DLAB | CFCR_8BITS); 276651078Speter sp->dlbl = inb(iobase + com_dlbl); 276751078Speter sp->dlbh = inb(iobase + com_dlbh); 276851078Speter /* 276951078Speter * Only set the divisor registers if they would change, since on 277051078Speter * some 16550 incompatibles (Startech), setting them clears the 277151078Speter * data input register. This also reduces the effects of the 277251078Speter * UMC8669F bug. 277351078Speter */ 277451078Speter divisor = ttspeedtab(speed, comspeedtab); 277551078Speter dlbl = divisor & 0xFF; 277651078Speter if (sp->dlbl != dlbl) 277751078Speter outb(iobase + com_dlbl, dlbl); 277851078Speter dlbh = (u_int) divisor >> 8; 277951078Speter if (sp->dlbh != dlbh) 278051078Speter outb(iobase + com_dlbh, dlbh); 278151078Speter outb(iobase + com_cfcr, CFCR_8BITS); 278251078Speter sp->mcr = inb(iobase + com_mcr); 278351078Speter /* 278451078Speter * We don't want interrupts, but must be careful not to "disable" 278551078Speter * them by clearing the MCR_IENABLE bit, since that might cause 278651078Speter * an interrupt by floating the IRQ line. 278751078Speter */ 278851078Speter outb(iobase + com_mcr, (sp->mcr & MCR_IENABLE) | MCR_DTR | MCR_RTS); 278951078Speter} 279051078Speter 279151078Speterstatic void 279251078Spetersiocnclose(sp, iobase) 279351078Speter struct siocnstate *sp; 279451078Speter Port_t iobase; 279551078Speter{ 279651078Speter /* 279751078Speter * Restore the device control registers. 279851078Speter */ 279951078Speter siocntxwait(iobase); 280051078Speter outb(iobase + com_cfcr, CFCR_DLAB | CFCR_8BITS); 280151078Speter if (sp->dlbl != inb(iobase + com_dlbl)) 280251078Speter outb(iobase + com_dlbl, sp->dlbl); 280351078Speter if (sp->dlbh != inb(iobase + com_dlbh)) 280451078Speter outb(iobase + com_dlbh, sp->dlbh); 280551078Speter outb(iobase + com_cfcr, sp->cfcr); 280651078Speter /* 280751078Speter * XXX damp oscillations of MCR_DTR and MCR_RTS by not restoring them. 280851078Speter */ 280951078Speter outb(iobase + com_mcr, sp->mcr | MCR_DTR | MCR_RTS); 281051078Speter outb(iobase + com_ier, sp->ier); 281151078Speter} 281251078Speter 281351078Speterstatic void 281451078Spetersiocnprobe(cp) 281551078Speter struct consdev *cp; 281651078Speter{ 281751078Speter speed_t boot_speed; 281851078Speter u_char cfcr; 281951078Speter int s, unit; 282051078Speter struct siocnstate sp; 282151078Speter 282251078Speter /* 282351078Speter * Find our first enabled console, if any. If it is a high-level 282451078Speter * console device, then initialize it and return successfully. 282551078Speter * If it is a low-level console device, then initialize it and 282651078Speter * return unsuccessfully. It must be initialized in both cases 282751078Speter * for early use by console drivers and debuggers. Initializing 282851078Speter * the hardware is not necessary in all cases, since the i/o 282951078Speter * routines initialize it on the fly, but it is necessary if 283051078Speter * input might arrive while the hardware is switched back to an 283151078Speter * uninitialized state. We can't handle multiple console devices 283251078Speter * yet because our low-level routines don't take a device arg. 283351078Speter * We trust the user to set the console flags properly so that we 283451078Speter * don't need to probe. 283551078Speter */ 283651078Speter cp->cn_pri = CN_DEAD; 283751078Speter 283851078Speter for (unit = 0; unit < 16; unit++) { /* XXX need to know how many */ 283951078Speter int flags; 284051078Speter int disabled; 284151078Speter if (resource_int_value("sio", unit, "disabled", &disabled) == 0) { 284251078Speter if (disabled) 284351078Speter continue; 284451078Speter } 284551078Speter if (resource_int_value("sio", unit, "flags", &flags)) 284651078Speter continue; 284751078Speter if (COM_CONSOLE(flags) || COM_DEBUGGER(flags)) { 284851078Speter int port; 284951078Speter Port_t iobase; 285051078Speter 285151078Speter if (resource_int_value("sio", unit, "port", &port)) 285251078Speter continue; 285351078Speter iobase = port; 285451078Speter s = spltty(); 285551078Speter if (boothowto & RB_SERIAL) { 285651078Speter boot_speed = siocngetspeed(iobase, comspeedtab); 285751078Speter if (boot_speed) 285851078Speter comdefaultrate = boot_speed; 285951078Speter } 286051078Speter 286151078Speter /* 286251078Speter * Initialize the divisor latch. We can't rely on 286351078Speter * siocnopen() to do this the first time, since it 286451078Speter * avoids writing to the latch if the latch appears 286551078Speter * to have the correct value. Also, if we didn't 286651078Speter * just read the speed from the hardware, then we 286751078Speter * need to set the speed in hardware so that 286851078Speter * switching it later is null. 286951078Speter */ 287051078Speter cfcr = inb(iobase + com_cfcr); 287151078Speter outb(iobase + com_cfcr, CFCR_DLAB | cfcr); 287251078Speter outb(iobase + com_dlbl, 287351078Speter COMBRD(comdefaultrate) & 0xff); 287451078Speter outb(iobase + com_dlbh, 287551078Speter (u_int) COMBRD(comdefaultrate) >> 8); 287651078Speter outb(iobase + com_cfcr, cfcr); 287751078Speter 287851078Speter siocnopen(&sp, iobase, comdefaultrate); 287951078Speter 288051078Speter splx(s); 288151078Speter if (COM_CONSOLE(flags) && !COM_LLCONSOLE(flags)) { 288251078Speter cp->cn_dev = makedev(CDEV_MAJOR, unit); 288351078Speter cp->cn_pri = COM_FORCECONSOLE(flags) 288451078Speter || boothowto & RB_SERIAL 288551078Speter ? CN_REMOTE : CN_NORMAL; 288651078Speter siocniobase = iobase; 288751078Speter siocnunit = unit; 288851078Speter } 288951078Speter if (COM_DEBUGGER(flags)) { 289051078Speter printf("sio%d: gdb debugging port\n", unit); 289151078Speter siogdbiobase = iobase; 289251078Speter siogdbunit = unit; 289351078Speter#if DDB > 0 289451078Speter gdbdev = makedev(CDEV_MAJOR, unit); 289551078Speter gdb_getc = siocngetc; 289651078Speter gdb_putc = siocnputc; 289751078Speter#endif 289851078Speter } 289951078Speter } 290051078Speter } 290151078Speter#ifdef __i386__ 290251078Speter#if DDB > 0 290351078Speter /* 290451078Speter * XXX Ugly Compatability. 290551078Speter * If no gdb port has been specified, set it to be the console 290651078Speter * as some configuration files don't specify the gdb port. 290751078Speter */ 290851078Speter if (gdbdev == NODEV && (boothowto & RB_GDB)) { 290951078Speter printf("Warning: no GDB port specified. Defaulting to sio%d.\n", 291051078Speter siocnunit); 291151078Speter printf("Set flag 0x80 on desired GDB port in your\n"); 291251078Speter printf("configuration file (currently sio only).\n"); 291351078Speter siogdbiobase = siocniobase; 291451078Speter siogdbunit = siocnunit; 291551078Speter gdbdev = makedev(CDEV_MAJOR, siocnunit); 291651078Speter gdb_getc = siocngetc; 291751078Speter gdb_putc = siocnputc; 291851078Speter } 291951078Speter#endif 292051078Speter#endif 292151078Speter} 292251078Speter 292351078Speter#ifdef __alpha__ 292451078Speter 292551078SpeterCONS_DRIVER(sio, NULL, NULL, NULL, siocngetc, siocncheckc, siocnputc); 292651078Speter 292751078Speterint 292851078Spetersiocnattach(port, speed) 292951078Speter int port; 293051078Speter int speed; 293151078Speter{ 293251078Speter int s; 293351078Speter u_char cfcr; 293451078Speter struct siocnstate sp; 293551078Speter 293651078Speter siocniobase = port; 293751078Speter comdefaultrate = speed; 293851078Speter sio_consdev.cn_pri = CN_NORMAL; 293951078Speter sio_consdev.cn_dev = makedev(CDEV_MAJOR, 0); 294051078Speter 294151078Speter s = spltty(); 294251078Speter 294351078Speter /* 294451078Speter * Initialize the divisor latch. We can't rely on 294551078Speter * siocnopen() to do this the first time, since it 294651078Speter * avoids writing to the latch if the latch appears 294751078Speter * to have the correct value. Also, if we didn't 294851078Speter * just read the speed from the hardware, then we 294951078Speter * need to set the speed in hardware so that 295051078Speter * switching it later is null. 295151078Speter */ 295251078Speter cfcr = inb(siocniobase + com_cfcr); 295351078Speter outb(siocniobase + com_cfcr, CFCR_DLAB | cfcr); 295451078Speter outb(siocniobase + com_dlbl, 295551078Speter COMBRD(comdefaultrate) & 0xff); 295651078Speter outb(siocniobase + com_dlbh, 295751078Speter (u_int) COMBRD(comdefaultrate) >> 8); 295851078Speter outb(siocniobase + com_cfcr, cfcr); 295951078Speter 296051078Speter siocnopen(&sp, siocniobase, comdefaultrate); 296151078Speter splx(s); 296251078Speter 296351078Speter cn_tab = &sio_consdev; 296451078Speter return 0; 296551078Speter} 296651078Speter 296751078Speterint 296851078Spetersiogdbattach(port, speed) 296951078Speter int port; 297051078Speter int speed; 297151078Speter{ 297251078Speter int s; 297351078Speter u_char cfcr; 297451078Speter struct siocnstate sp; 297551078Speter 297651078Speter siogdbiobase = port; 297751078Speter gdbdefaultrate = speed; 297851078Speter 297951078Speter s = spltty(); 298051078Speter 298151078Speter /* 298251078Speter * Initialize the divisor latch. We can't rely on 298351078Speter * siocnopen() to do this the first time, since it 298451078Speter * avoids writing to the latch if the latch appears 298551078Speter * to have the correct value. Also, if we didn't 298651078Speter * just read the speed from the hardware, then we 298751078Speter * need to set the speed in hardware so that 298851078Speter * switching it later is null. 298951078Speter */ 299051078Speter cfcr = inb(siogdbiobase + com_cfcr); 299151078Speter outb(siogdbiobase + com_cfcr, CFCR_DLAB | cfcr); 299251078Speter outb(siogdbiobase + com_dlbl, 299351078Speter COMBRD(gdbdefaultrate) & 0xff); 299451078Speter outb(siogdbiobase + com_dlbh, 299551078Speter (u_int) COMBRD(gdbdefaultrate) >> 8); 299651078Speter outb(siogdbiobase + com_cfcr, cfcr); 299751078Speter 299851078Speter siocnopen(&sp, siogdbiobase, gdbdefaultrate); 299951078Speter splx(s); 300051078Speter 300151078Speter return 0; 300251078Speter} 300351078Speter 300451078Speter#endif 300551078Speter 300651078Speterstatic void 300751078Spetersiocninit(cp) 300851078Speter struct consdev *cp; 300951078Speter{ 301051078Speter comconsole = DEV_TO_UNIT(cp->cn_dev); 301151078Speter} 301251078Speter 301351078Speterstatic int 301451078Spetersiocncheckc(dev) 301551078Speter dev_t dev; 301651078Speter{ 301751078Speter int c; 301851078Speter Port_t iobase; 301951078Speter int s; 302051078Speter struct siocnstate sp; 302151078Speter 302251078Speter if (minor(dev) == siogdbunit) 302351078Speter iobase = siogdbiobase; 302451078Speter else 302551078Speter iobase = siocniobase; 302651078Speter s = spltty(); 302751078Speter siocnopen(&sp, iobase, comdefaultrate); 302851078Speter if (inb(iobase + com_lsr) & LSR_RXRDY) 302951078Speter c = inb(iobase + com_data); 303051078Speter else 303151078Speter c = -1; 303251078Speter siocnclose(&sp, iobase); 303351078Speter splx(s); 303451078Speter return (c); 303551078Speter} 303651078Speter 303751078Speter 303851078Speterint 303951078Spetersiocngetc(dev) 304051078Speter dev_t dev; 304151078Speter{ 304251078Speter int c; 304351078Speter Port_t iobase; 304451078Speter int s; 304551078Speter struct siocnstate sp; 304651078Speter 304751078Speter if (minor(dev) == siogdbunit) 304851078Speter iobase = siogdbiobase; 304951078Speter else 305051078Speter iobase = siocniobase; 305151078Speter s = spltty(); 305251078Speter siocnopen(&sp, iobase, comdefaultrate); 305351078Speter while (!(inb(iobase + com_lsr) & LSR_RXRDY)) 305451078Speter ; 305551078Speter c = inb(iobase + com_data); 305651078Speter siocnclose(&sp, iobase); 305751078Speter splx(s); 305851078Speter return (c); 305951078Speter} 306051078Speter 306151078Spetervoid 306251078Spetersiocnputc(dev, c) 306351078Speter dev_t dev; 306451078Speter int c; 306551078Speter{ 306651078Speter int s; 306751078Speter struct siocnstate sp; 306851078Speter Port_t iobase; 306951078Speter 307051078Speter if (minor(dev) == siogdbunit) 307151078Speter iobase = siogdbiobase; 307251078Speter else 307351078Speter iobase = siocniobase; 307451078Speter s = spltty(); 307551078Speter siocnopen(&sp, iobase, comdefaultrate); 307651078Speter siocntxwait(iobase); 307751078Speter outb(iobase + com_data, c); 307851078Speter siocnclose(&sp, iobase); 307951078Speter splx(s); 308051078Speter} 308151078Speter 308251078Speter#ifdef __alpha__ 308351078Speterint 308451078Spetersiogdbgetc() 308551078Speter{ 308651078Speter int c; 308751078Speter Port_t iobase; 308851078Speter int s; 308951078Speter struct siocnstate sp; 309051078Speter 309151078Speter iobase = siogdbiobase; 309251078Speter s = spltty(); 309351078Speter siocnopen(&sp, iobase, gdbdefaultrate); 309451078Speter while (!(inb(iobase + com_lsr) & LSR_RXRDY)) 309551078Speter ; 309651078Speter c = inb(iobase + com_data); 309751078Speter siocnclose(&sp, iobase); 309851078Speter splx(s); 309951078Speter return (c); 310051078Speter} 310151078Speter 310251078Spetervoid 310351078Spetersiogdbputc(c) 310451078Speter int c; 310551078Speter{ 310651078Speter int s; 310751078Speter struct siocnstate sp; 310851078Speter 310951078Speter s = spltty(); 311051078Speter siocnopen(&sp, siogdbiobase, gdbdefaultrate); 311151078Speter siocntxwait(siogdbiobase); 311251078Speter outb(siogdbiobase + com_data, c); 311351078Speter siocnclose(&sp, siogdbiobase); 311451078Speter splx(s); 311551078Speter} 311651078Speter#endif 311751078Speter 311852471SimpDRIVER_MODULE(sio, isa, sio_isa_driver, sio_devclass, 0, 0); 311952471Simp#if NCARD > 0 312052471SimpDRIVER_MODULE(sio, pccard, sio_pccard_driver, sio_devclass, 0, 0); 312152471Simp#endif 3122