sio.c revision 57769
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 57769 2000-03-05 14:44:05Z 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 */ 56256229Speter {0x0100440e, NULL}, /* CRD0001 - Cardinal MVP288IV ? */ 56354944Speter {0x1200c31e, NULL}, /* GVC0012 - VF1128HV-R9 (win modem?) */ 56454944Speter {0x0303c31e, NULL}, /* GVC0303 - MaxTech 33.6 PnP D/F/V */ 56555124Speter {0x0505c31e, NULL}, /* GVC0505 - GVC 56k Faxmodem */ 56654944Speter {0x0050c31e, NULL}, /* GVC5000 - some GVC modem */ 56754944Speter {0x3800f91e, NULL}, /* GWY0038 - Telepath with v.90 */ 56854944Speter {0x9062f91e, NULL}, /* GWY6290 - Telepath with x2 Technology */ 56954944Speter {0x0000f435, NULL}, /* MOT0000 - Motorola ModemSURFR 33.6 Intern */ 57054944Speter {0x5015f435, NULL}, /* MOT1550 - Motorola ModemSURFR 56K Modem */ 57154944Speter {0xf015f435, NULL}, /* MOT15F0 - Motorola VoiceSURFR 56K Modem */ 57254944Speter {0x6045f435, NULL}, /* MOT4560 - Motorola ? */ 57354944Speter {0x61e7a338, NULL}, /* NECE761 - 33.6Modem */ 57454944Speter {0x39804f3f, NULL}, /* OZO8039 - Zoom 56k flex */ 57557769Speter {0x3024a341, NULL}, /* PMC2430 - Pace 56 Voice Internal Modem */ 57654944Speter {0x1000eb49, NULL}, /* ROK0010 - Rockwell ? */ 57754944Speter {0x5002734a, NULL}, /* RSS0250 - 5614Jx3(G) Internal Modem */ 57854944Speter {0xc100ad4d, NULL}, /* SMM00C1 - Leopard 56k PnP */ 57956229Speter {0x9012b04e, NULL}, /* SUP1290 - Supra ? */ 58054944Speter {0x1013b04e, NULL}, /* SUP1310 - SupraExpress 336i PnP */ 58154944Speter {0x8013b04e, NULL}, /* SUP1380 - SupraExpress 288i PnP Voice */ 58254944Speter {0x8113b04e, NULL}, /* SUP1381 - SupraExpress 336i PnP Voice */ 58354944Speter {0x5016b04e, NULL}, /* SUP1650 - Supra 336i Sp Intl */ 58454944Speter {0x7420b04e, NULL}, /* SUP2070 - Supra ? */ 58554944Speter {0x8020b04e, NULL}, /* SUP2080 - Supra ? */ 58654944Speter {0x8420b04e, NULL}, /* SUP2084 - SupraExpress 56i PnP */ 58756229Speter {0x7121b04e, NULL}, /* SUP2171 - SupraExpress 56i Sp? */ 58854944Speter {0x8024b04e, NULL}, /* SUP2480 - Supra ? */ 58954944Speter {0x01007256, NULL}, /* USR0001 - U.S. Robotics Inc., Sportster W */ 59054944Speter {0x02007256, NULL}, /* USR0002 - U.S. Robotics Inc. Sportster 33. */ 59154944Speter {0x04007256, NULL}, /* USR0004 - USR Sportster 14.4k */ 59254944Speter {0x06007256, NULL}, /* USR0006 - USR Sportster 33.6k */ 59356229Speter {0x11007256, NULL}, /* USR0011 - USR ? */ 59454944Speter {0x01017256, NULL}, /* USR0101 - USR ? */ 59554944Speter {0x30207256, NULL}, /* USR2030 - U.S.Robotics Inc. Sportster 560 */ 59654944Speter {0x50207256, NULL}, /* USR2050 - U.S.Robotics Inc. Sportster 33. */ 59754944Speter {0x70207256, NULL}, /* USR2070 - U.S.Robotics Inc. Sportster 560 */ 59854944Speter {0x30307256, NULL}, /* USR3030 - U.S. Robotics 56K FAX INT */ 59954944Speter {0x31307256, NULL}, /* USR3031 - U.S. Robotics 56K FAX INT */ 60054944Speter {0x70307256, NULL}, /* USR3070 - U.S. Robotics 56K Voice INT */ 60156229Speter {0x90307256, NULL}, /* USR3090 - USR ? */ 60254944Speter {0x90917256, NULL}, /* USR9190 - USR 56k Voice INT */ 60354944Speter {0x0300695c, NULL}, /* WCI0003 - Fax/Voice/Modem/Speakphone/Asvd */ 60454944Speter {0x61f7896a, NULL}, /* ZTIF761 - Zoom ComStar 33.6 */ 60551078Speter {0} 60651078Speter}; 60751078Speter 60856229Speter 60956229Speter 61051078Speterstatic int 61152471Simpsio_isa_probe(dev) 61252471Simp device_t dev; 61352471Simp{ 61452471Simp /* Check isapnp ids */ 61552471Simp if (ISA_PNP_PROBE(device_get_parent(dev), dev, sio_ids) == ENXIO) 61652471Simp return (ENXIO); 61752471Simp return (sioprobe(dev)); 61852471Simp} 61952471Simp 62052471Simpstatic int 62151078Spetersioprobe(dev) 62251078Speter device_t dev; 62351078Speter{ 62453344Speter#if 0 62551078Speter static bool_t already_init; 62653344Speter device_t xdev; 62753344Speter#endif 62851078Speter bool_t failures[10]; 62951078Speter int fn; 63051078Speter device_t idev; 63151078Speter Port_t iobase; 63251078Speter intrmask_t irqmap[4]; 63351078Speter intrmask_t irqs; 63451078Speter u_char mcr_image; 63551078Speter int result; 63654206Speter u_long xirq; 63751088Speter u_int flags = device_get_flags(dev); 63851078Speter int rid; 63951078Speter struct resource *port; 64051078Speter 64151078Speter rid = 0; 64251078Speter port = bus_alloc_resource(dev, SYS_RES_IOPORT, &rid, 64351078Speter 0, ~0, IO_COMSIZE, RF_ACTIVE); 64451078Speter if (!port) 64551078Speter return ENXIO; 64651078Speter 64753344Speter#if 0 64853344Speter /* 64953344Speter * XXX this is broken - when we are first called, there are no 65053344Speter * previously configured IO ports. We could hard code 65153344Speter * 0x3f8, 0x2f8, 0x3e8, 0x2e8 etc but that's probably worse. 65253344Speter * This code has been doing nothing since the conversion since 65353344Speter * "count" is zero the first time around. 65453344Speter */ 65551078Speter if (!already_init) { 65651078Speter /* 65751078Speter * Turn off MCR_IENABLE for all likely serial ports. An unused 65851078Speter * port with its MCR_IENABLE gate open will inhibit interrupts 65951078Speter * from any used port that shares the interrupt vector. 66051078Speter * XXX the gate enable is elsewhere for some multiports. 66151078Speter */ 66251078Speter device_t *devs; 66353344Speter int count, i, xioport; 66451078Speter 66551078Speter devclass_get_devices(sio_devclass, &devs, &count); 66651078Speter for (i = 0; i < count; i++) { 66751078Speter xdev = devs[i]; 66854194Speter if (device_is_enabled(xdev) && 66954194Speter bus_get_resource(xdev, SYS_RES_IOPORT, 0, &xioport, 67054194Speter NULL) == 0) 67153344Speter outb(xioport + com_mcr, 0); 67251078Speter } 67351078Speter free(devs, M_TEMP); 67451078Speter already_init = TRUE; 67551078Speter } 67653344Speter#endif 67751078Speter 67851078Speter if (COM_LLCONSOLE(flags)) { 67951078Speter printf("sio%d: reserved for low-level i/o\n", 68051078Speter device_get_unit(dev)); 68156788Sbde bus_release_resource(dev, SYS_RES_IOPORT, rid, port); 68251078Speter return (ENXIO); 68351078Speter } 68451078Speter 68551078Speter /* 68651078Speter * If the device is on a multiport card and has an AST/4 68751078Speter * compatible interrupt control register, initialize this 68851078Speter * register and prepare to leave MCR_IENABLE clear in the mcr. 68951078Speter * Otherwise, prepare to set MCR_IENABLE in the mcr. 69051078Speter * Point idev to the device struct giving the correct id_irq. 69151078Speter * This is the struct for the master device if there is one. 69251078Speter */ 69351078Speter idev = dev; 69451078Speter mcr_image = MCR_IENABLE; 69551078Speter#ifdef COM_MULTIPORT 69657234Sbde if (COM_ISMULTIPORT(flags)) { 69754206Speter Port_t xiobase; 69854206Speter u_long io; 69954206Speter 70051078Speter idev = devclass_get_device(sio_devclass, COM_MPMASTER(flags)); 70151078Speter if (idev == NULL) { 70251078Speter printf("sio%d: master device %d not configured\n", 70351078Speter device_get_unit(dev), COM_MPMASTER(flags)); 70451078Speter idev = dev; 70551078Speter } 70657234Sbde if (!COM_NOTAST4(flags)) { 70757234Sbde if (bus_get_resource(idev, SYS_RES_IOPORT, 0, &io, 70857234Sbde NULL) == 0) { 70957234Sbde xiobase = io; 71057234Sbde if (bus_get_resource(idev, SYS_RES_IRQ, 0, 71157234Sbde NULL, NULL) == 0) 71257234Sbde outb(xiobase + com_scr, 0x80); 71357234Sbde else 71457234Sbde outb(xiobase + com_scr, 0); 71557234Sbde } 71657234Sbde mcr_image = 0; 71751078Speter } 71851078Speter } 71951078Speter#endif /* COM_MULTIPORT */ 72054194Speter if (bus_get_resource(idev, SYS_RES_IRQ, 0, NULL, NULL) != 0) 72151078Speter mcr_image = 0; 72251078Speter 72351078Speter bzero(failures, sizeof failures); 72451078Speter iobase = rman_get_start(port); 72551078Speter 72651078Speter /* 72751078Speter * We don't want to get actual interrupts, just masked ones. 72851078Speter * Interrupts from this line should already be masked in the ICU, 72951078Speter * but mask them in the processor as well in case there are some 73051078Speter * (misconfigured) shared interrupts. 73151078Speter */ 73251078Speter disable_intr(); 73351078Speter/* EXTRA DELAY? */ 73451078Speter 73551078Speter /* 73651078Speter * Initialize the speed and the word size and wait long enough to 73751078Speter * drain the maximum of 16 bytes of junk in device output queues. 73851078Speter * The speed is undefined after a master reset and must be set 73951078Speter * before relying on anything related to output. There may be 74051078Speter * junk after a (very fast) soft reboot and (apparently) after 74151078Speter * master reset. 74251078Speter * XXX what about the UART bug avoided by waiting in comparam()? 74351078Speter * We don't want to to wait long enough to drain at 2 bps. 74451078Speter */ 74551078Speter if (iobase == siocniobase) 74651078Speter DELAY((16 + 1) * 1000000 / (comdefaultrate / 10)); 74751078Speter else { 74851078Speter outb(iobase + com_cfcr, CFCR_DLAB | CFCR_8BITS); 74951078Speter outb(iobase + com_dlbl, COMBRD(SIO_TEST_SPEED) & 0xff); 75051078Speter outb(iobase + com_dlbh, (u_int) COMBRD(SIO_TEST_SPEED) >> 8); 75151078Speter outb(iobase + com_cfcr, CFCR_8BITS); 75251078Speter DELAY((16 + 1) * 1000000 / (SIO_TEST_SPEED / 10)); 75351078Speter } 75451078Speter 75551078Speter /* 75651078Speter * Enable the interrupt gate and disable device interupts. This 75751078Speter * should leave the device driving the interrupt line low and 75851078Speter * guarantee an edge trigger if an interrupt can be generated. 75951078Speter */ 76051078Speter/* EXTRA DELAY? */ 76151078Speter outb(iobase + com_mcr, mcr_image); 76251078Speter outb(iobase + com_ier, 0); 76351078Speter DELAY(1000); /* XXX */ 76451078Speter irqmap[0] = isa_irq_pending(); 76551078Speter 76651078Speter /* 76751078Speter * Attempt to set loopback mode so that we can send a null byte 76851078Speter * without annoying any external device. 76951078Speter */ 77051078Speter/* EXTRA DELAY? */ 77151078Speter outb(iobase + com_mcr, mcr_image | MCR_LOOPBACK); 77251078Speter 77351078Speter /* 77451078Speter * Attempt to generate an output interrupt. On 8250's, setting 77551078Speter * IER_ETXRDY generates an interrupt independent of the current 77651078Speter * setting and independent of whether the THR is empty. On 16450's, 77751078Speter * setting IER_ETXRDY generates an interrupt independent of the 77851078Speter * current setting. On 16550A's, setting IER_ETXRDY only 77951078Speter * generates an interrupt when IER_ETXRDY is not already set. 78051078Speter */ 78151078Speter outb(iobase + com_ier, IER_ETXRDY); 78251078Speter 78351078Speter /* 78451078Speter * On some 16x50 incompatibles, setting IER_ETXRDY doesn't generate 78551078Speter * an interrupt. They'd better generate one for actually doing 78651078Speter * output. Loopback may be broken on the same incompatibles but 78751078Speter * it's unlikely to do more than allow the null byte out. 78851078Speter */ 78951078Speter outb(iobase + com_data, 0); 79051078Speter DELAY((1 + 2) * 1000000 / (SIO_TEST_SPEED / 10)); 79151078Speter 79251078Speter /* 79351078Speter * Turn off loopback mode so that the interrupt gate works again 79451078Speter * (MCR_IENABLE was hidden). This should leave the device driving 79551078Speter * an interrupt line high. It doesn't matter if the interrupt 79651078Speter * line oscillates while we are not looking at it, since interrupts 79751078Speter * are disabled. 79851078Speter */ 79951078Speter/* EXTRA DELAY? */ 80051078Speter outb(iobase + com_mcr, mcr_image); 80151078Speter 80251078Speter /* 80352471Simp * Some pcmcia cards have the "TXRDY bug", so we check everyone 80451078Speter * for IIR_TXRDY implementation ( Palido 321s, DC-1S... ) 80551078Speter */ 80653370Speter if (COM_NOPROBE(flags)) { 80753370Speter /* Reading IIR register twice */ 80853370Speter for (fn = 0; fn < 2; fn ++) { 80953370Speter DELAY(10000); 81053370Speter failures[6] = inb(iobase + com_iir); 81153370Speter } 81253370Speter /* Check IIR_TXRDY clear ? */ 81353370Speter result = 0; 81453370Speter if (failures[6] & IIR_TXRDY) { 81553370Speter /* Nop, Double check with clearing IER */ 81653370Speter outb(iobase + com_ier, 0); 81753370Speter if (inb(iobase + com_iir) & IIR_NOPEND) { 81853370Speter /* Ok. we're familia this gang */ 81953370Speter SET_FLAG(dev, COM_C_IIR_TXRDYBUG); 82053370Speter } else { 82153370Speter /* Unknown, Just omit this chip.. XXX */ 82253370Speter result = ENXIO; 82353370Speter } 82451078Speter } else { 82553370Speter /* OK. this is well-known guys */ 82653370Speter CLR_FLAG(dev, COM_C_IIR_TXRDYBUG); 82751078Speter } 82853344Speter outb(iobase + com_cfcr, CFCR_8BITS); 82953344Speter enable_intr(); 83053344Speter bus_release_resource(dev, SYS_RES_IOPORT, rid, port); 83153344Speter return (iobase == siocniobase ? 0 : result); 83253344Speter } 83353344Speter 83451078Speter /* 83551078Speter * Check that 83651078Speter * o the CFCR, IER and MCR in UART hold the values written to them 83751078Speter * (the values happen to be all distinct - this is good for 83851078Speter * avoiding false positive tests from bus echoes). 83951078Speter * o an output interrupt is generated and its vector is correct. 84051078Speter * o the interrupt goes away when the IIR in the UART is read. 84151078Speter */ 84251078Speter/* EXTRA DELAY? */ 84351078Speter failures[0] = inb(iobase + com_cfcr) - CFCR_8BITS; 84451078Speter failures[1] = inb(iobase + com_ier) - IER_ETXRDY; 84551078Speter failures[2] = inb(iobase + com_mcr) - mcr_image; 84651078Speter DELAY(10000); /* Some internal modems need this time */ 84751078Speter irqmap[1] = isa_irq_pending(); 84851078Speter failures[4] = (inb(iobase + com_iir) & IIR_IMASK) - IIR_TXRDY; 84951078Speter DELAY(1000); /* XXX */ 85051078Speter irqmap[2] = isa_irq_pending(); 85151078Speter failures[6] = (inb(iobase + com_iir) & IIR_IMASK) - IIR_NOPEND; 85251078Speter 85351078Speter /* 85451078Speter * Turn off all device interrupts and check that they go off properly. 85551078Speter * Leave MCR_IENABLE alone. For ports without a master port, it gates 85651078Speter * the OUT2 output of the UART to 85751078Speter * the ICU input. Closing the gate would give a floating ICU input 85851078Speter * (unless there is another device driving it) and spurious interrupts. 85951078Speter * (On the system that this was first tested on, the input floats high 86051078Speter * and gives a (masked) interrupt as soon as the gate is closed.) 86151078Speter */ 86251078Speter outb(iobase + com_ier, 0); 86351078Speter outb(iobase + com_cfcr, CFCR_8BITS); /* dummy to avoid bus echo */ 86451078Speter failures[7] = inb(iobase + com_ier); 86551078Speter DELAY(1000); /* XXX */ 86651078Speter irqmap[3] = isa_irq_pending(); 86751078Speter failures[9] = (inb(iobase + com_iir) & IIR_IMASK) - IIR_NOPEND; 86851078Speter 86951078Speter enable_intr(); 87051078Speter 87151078Speter irqs = irqmap[1] & ~irqmap[0]; 87254194Speter if (bus_get_resource(idev, SYS_RES_IRQ, 0, &xirq, NULL) == 0 && 87354194Speter ((1 << xirq) & irqs) == 0) 87451078Speter printf( 87554206Speter "sio%d: configured irq %ld not in bitmap of probed irqs %#x\n", 87653344Speter device_get_unit(dev), xirq, irqs); 87751078Speter if (bootverbose) 87851078Speter printf("sio%d: irq maps: %#x %#x %#x %#x\n", 87951078Speter device_get_unit(dev), 88051078Speter irqmap[0], irqmap[1], irqmap[2], irqmap[3]); 88151078Speter 88251078Speter result = 0; 88351078Speter for (fn = 0; fn < sizeof failures; ++fn) 88451078Speter if (failures[fn]) { 88551078Speter outb(iobase + com_mcr, 0); 88651078Speter result = ENXIO; 88751078Speter if (bootverbose) { 88851078Speter printf("sio%d: probe failed test(s):", 88951078Speter device_get_unit(dev)); 89051078Speter for (fn = 0; fn < sizeof failures; ++fn) 89151078Speter if (failures[fn]) 89251078Speter printf(" %d", fn); 89351078Speter printf("\n"); 89451078Speter } 89551078Speter break; 89651078Speter } 89751078Speter bus_release_resource(dev, SYS_RES_IOPORT, rid, port); 89851078Speter return (iobase == siocniobase ? 0 : result); 89951078Speter} 90051078Speter 90151078Speter#ifdef COM_ESP 90251078Speterstatic int 90351078Speterespattach(com, esp_port) 90451078Speter struct com_s *com; 90551078Speter Port_t esp_port; 90651078Speter{ 90751078Speter u_char dips; 90851078Speter u_char val; 90951078Speter 91051078Speter /* 91151078Speter * Check the ESP-specific I/O port to see if we're an ESP 91251078Speter * card. If not, return failure immediately. 91351078Speter */ 91451078Speter if ((inb(esp_port) & 0xf3) == 0) { 91551078Speter printf(" port 0x%x is not an ESP board?\n", esp_port); 91651078Speter return (0); 91751078Speter } 91851078Speter 91951078Speter /* 92051078Speter * We've got something that claims to be a Hayes ESP card. 92151078Speter * Let's hope so. 92251078Speter */ 92351078Speter 92451078Speter /* Get the dip-switch configuration */ 92551078Speter outb(esp_port + ESP_CMD1, ESP_GETDIPS); 92651078Speter dips = inb(esp_port + ESP_STATUS1); 92751078Speter 92851078Speter /* 92951078Speter * Bits 0,1 of dips say which COM port we are. 93051078Speter */ 93151078Speter if (com->iobase == likely_com_ports[dips & 0x03]) 93251078Speter printf(" : ESP"); 93351078Speter else { 93451078Speter printf(" esp_port has com %d\n", dips & 0x03); 93551078Speter return (0); 93651078Speter } 93751078Speter 93851078Speter /* 93951078Speter * Check for ESP version 2.0 or later: bits 4,5,6 = 010. 94051078Speter */ 94151078Speter outb(esp_port + ESP_CMD1, ESP_GETTEST); 94251078Speter val = inb(esp_port + ESP_STATUS1); /* clear reg 1 */ 94351078Speter val = inb(esp_port + ESP_STATUS2); 94451078Speter if ((val & 0x70) < 0x20) { 94551078Speter printf("-old (%o)", val & 0x70); 94651078Speter return (0); 94751078Speter } 94851078Speter 94951078Speter /* 95051078Speter * Check for ability to emulate 16550: bit 7 == 1 95151078Speter */ 95251078Speter if ((dips & 0x80) == 0) { 95351078Speter printf(" slave"); 95451078Speter return (0); 95551078Speter } 95651078Speter 95751078Speter /* 95851078Speter * Okay, we seem to be a Hayes ESP card. Whee. 95951078Speter */ 96051078Speter com->esp = TRUE; 96151078Speter com->esp_port = esp_port; 96251078Speter return (1); 96351078Speter} 96451078Speter#endif /* COM_ESP */ 96551078Speter 96651078Speterstatic int 96752471Simpsio_isa_attach(dev) 96852471Simp device_t dev; 96952471Simp{ 97052471Simp return (sioattach(dev)); 97152471Simp} 97252471Simp 97352471Simpstatic int 97451078Spetersioattach(dev) 97551078Speter device_t dev; 97651078Speter{ 97751078Speter struct com_s *com; 97851078Speter#ifdef COM_ESP 97951078Speter Port_t *espp; 98051078Speter#endif 98151078Speter Port_t iobase; 98251078Speter int unit; 98353344Speter u_int flags; 98451078Speter int rid; 98551078Speter struct resource *port; 98653344Speter int ret; 98751078Speter 98851078Speter rid = 0; 98951078Speter port = bus_alloc_resource(dev, SYS_RES_IOPORT, &rid, 99051078Speter 0, ~0, IO_COMSIZE, RF_ACTIVE); 99151078Speter if (!port) 99251078Speter return ENXIO; 99351078Speter 99451078Speter iobase = rman_get_start(port); 99551078Speter unit = device_get_unit(dev); 99651078Speter com = device_get_softc(dev); 99753344Speter flags = device_get_flags(dev); 99851078Speter 99953344Speter if (unit >= sio_numunits) 100053344Speter sio_numunits = unit + 1; 100151078Speter /* 100251078Speter * sioprobe() has initialized the device registers as follows: 100351078Speter * o cfcr = CFCR_8BITS. 100451078Speter * It is most important that CFCR_DLAB is off, so that the 100551078Speter * data port is not hidden when we enable interrupts. 100651078Speter * o ier = 0. 100751078Speter * Interrupts are only enabled when the line is open. 100851078Speter * o mcr = MCR_IENABLE, or 0 if the port has AST/4 compatible 100951078Speter * interrupt control register or the config specifies no irq. 101051078Speter * Keeping MCR_DTR and MCR_RTS off might stop the external 101151078Speter * device from sending before we are ready. 101251078Speter */ 101351078Speter bzero(com, sizeof *com); 101451078Speter com->unit = unit; 101551078Speter com->ioportres = port; 101651078Speter com->cfcr_image = CFCR_8BITS; 101751078Speter com->dtr_wait = 3 * hz; 101851078Speter com->loses_outints = COM_LOSESOUTINTS(flags) != 0; 101957234Sbde com->no_irq = bus_get_resource(dev, SYS_RES_IRQ, 0, NULL, NULL) != 0; 102051078Speter com->tx_fifo_size = 1; 102151078Speter com->obufs[0].l_head = com->obuf1; 102251078Speter com->obufs[1].l_head = com->obuf2; 102351078Speter 102451078Speter com->iobase = iobase; 102551078Speter com->data_port = iobase + com_data; 102651078Speter com->int_id_port = iobase + com_iir; 102751078Speter com->modem_ctl_port = iobase + com_mcr; 102851078Speter com->mcr_image = inb(com->modem_ctl_port); 102951078Speter com->line_status_port = iobase + com_lsr; 103051078Speter com->modem_status_port = iobase + com_msr; 103151078Speter com->intr_ctl_port = iobase + com_ier; 103251078Speter 103351078Speter /* 103451078Speter * We don't use all the flags from <sys/ttydefaults.h> since they 103551078Speter * are only relevant for logins. It's important to have echo off 103651078Speter * initially so that the line doesn't start blathering before the 103751078Speter * echo flag can be turned off. 103851078Speter */ 103951078Speter com->it_in.c_iflag = 0; 104051078Speter com->it_in.c_oflag = 0; 104151078Speter com->it_in.c_cflag = TTYDEF_CFLAG; 104251078Speter com->it_in.c_lflag = 0; 104351078Speter if (unit == comconsole) { 104451078Speter com->it_in.c_iflag = TTYDEF_IFLAG; 104551078Speter com->it_in.c_oflag = TTYDEF_OFLAG; 104651078Speter com->it_in.c_cflag = TTYDEF_CFLAG | CLOCAL; 104751078Speter com->it_in.c_lflag = TTYDEF_LFLAG; 104851078Speter com->lt_out.c_cflag = com->lt_in.c_cflag = CLOCAL; 104951078Speter com->lt_out.c_ispeed = com->lt_out.c_ospeed = 105051078Speter com->lt_in.c_ispeed = com->lt_in.c_ospeed = 105151078Speter com->it_in.c_ispeed = com->it_in.c_ospeed = comdefaultrate; 105251078Speter } else 105351078Speter com->it_in.c_ispeed = com->it_in.c_ospeed = TTYDEF_SPEED; 105451078Speter if (siosetwater(com, com->it_in.c_ispeed) != 0) { 105551078Speter enable_intr(); 105656788Sbde /* 105756788Sbde * Leave i/o resources allocated if this is a `cn'-level 105856788Sbde * console, so that other devices can't snarf them. 105956788Sbde */ 106056788Sbde if (iobase != siocniobase) 106156788Sbde bus_release_resource(dev, SYS_RES_IOPORT, rid, port); 106256788Sbde return (ENOMEM); 106351078Speter } 106451078Speter enable_intr(); 106551078Speter termioschars(&com->it_in); 106651078Speter com->it_out = com->it_in; 106751078Speter 106851078Speter /* attempt to determine UART type */ 106951078Speter printf("sio%d: type", unit); 107051078Speter 107151078Speter 107251078Speter#ifdef COM_MULTIPORT 107351078Speter if (!COM_ISMULTIPORT(flags) && !COM_IIR_TXRDYBUG(flags)) 107451078Speter#else 107551078Speter if (!COM_IIR_TXRDYBUG(flags)) 107651078Speter#endif 107751078Speter { 107851078Speter u_char scr; 107951078Speter u_char scr1; 108051078Speter u_char scr2; 108151078Speter 108251078Speter scr = inb(iobase + com_scr); 108351078Speter outb(iobase + com_scr, 0xa5); 108451078Speter scr1 = inb(iobase + com_scr); 108551078Speter outb(iobase + com_scr, 0x5a); 108651078Speter scr2 = inb(iobase + com_scr); 108751078Speter outb(iobase + com_scr, scr); 108851078Speter if (scr1 != 0xa5 || scr2 != 0x5a) { 108951078Speter printf(" 8250"); 109051078Speter goto determined_type; 109151078Speter } 109251078Speter } 109351078Speter outb(iobase + com_fifo, FIFO_ENABLE | FIFO_RX_HIGH); 109451078Speter DELAY(100); 109551078Speter com->st16650a = 0; 109651078Speter switch (inb(com->int_id_port) & IIR_FIFO_MASK) { 109751078Speter case FIFO_RX_LOW: 109851078Speter printf(" 16450"); 109951078Speter break; 110051078Speter case FIFO_RX_MEDL: 110151078Speter printf(" 16450?"); 110251078Speter break; 110351078Speter case FIFO_RX_MEDH: 110451078Speter printf(" 16550?"); 110551078Speter break; 110651078Speter case FIFO_RX_HIGH: 110751078Speter if (COM_NOFIFO(flags)) { 110851078Speter printf(" 16550A fifo disabled"); 110951078Speter } else { 111051078Speter com->hasfifo = TRUE; 111151078Speter if (COM_ST16650A(flags)) { 111251078Speter com->st16650a = 1; 111351078Speter com->tx_fifo_size = 32; 111451078Speter printf(" ST16650A"); 111551078Speter } else { 111651078Speter com->tx_fifo_size = COM_FIFOSIZE(flags); 111751078Speter printf(" 16550A"); 111851078Speter } 111951078Speter } 112051078Speter#ifdef COM_ESP 112151078Speter for (espp = likely_esp_ports; *espp != 0; espp++) 112251078Speter if (espattach(com, *espp)) { 112351078Speter com->tx_fifo_size = 1024; 112451078Speter break; 112551078Speter } 112651078Speter#endif 112751078Speter if (!com->st16650a) { 112851078Speter if (!com->tx_fifo_size) 112951078Speter com->tx_fifo_size = 16; 113051078Speter else 113151078Speter printf(" lookalike with %d bytes FIFO", 113251078Speter com->tx_fifo_size); 113351078Speter } 113451078Speter 113551078Speter break; 113651078Speter } 113751078Speter 113851078Speter#ifdef COM_ESP 113951078Speter if (com->esp) { 114051078Speter /* 114151078Speter * Set 16550 compatibility mode. 114251078Speter * We don't use the ESP_MODE_SCALE bit to increase the 114351078Speter * fifo trigger levels because we can't handle large 114451078Speter * bursts of input. 114551078Speter * XXX flow control should be set in comparam(), not here. 114651078Speter */ 114751078Speter outb(com->esp_port + ESP_CMD1, ESP_SETMODE); 114851078Speter outb(com->esp_port + ESP_CMD2, ESP_MODE_RTS | ESP_MODE_FIFO); 114951078Speter 115051078Speter /* Set RTS/CTS flow control. */ 115151078Speter outb(com->esp_port + ESP_CMD1, ESP_SETFLOWTYPE); 115251078Speter outb(com->esp_port + ESP_CMD2, ESP_FLOW_RTS); 115351078Speter outb(com->esp_port + ESP_CMD2, ESP_FLOW_CTS); 115451078Speter 115551078Speter /* Set flow-control levels. */ 115651078Speter outb(com->esp_port + ESP_CMD1, ESP_SETRXFLOW); 115751078Speter outb(com->esp_port + ESP_CMD2, HIBYTE(768)); 115851078Speter outb(com->esp_port + ESP_CMD2, LOBYTE(768)); 115951078Speter outb(com->esp_port + ESP_CMD2, HIBYTE(512)); 116051078Speter outb(com->esp_port + ESP_CMD2, LOBYTE(512)); 116151078Speter } 116251078Speter#endif /* COM_ESP */ 116351078Speter outb(iobase + com_fifo, 0); 116451078Speterdetermined_type: ; 116551078Speter 116651078Speter#ifdef COM_MULTIPORT 116751078Speter if (COM_ISMULTIPORT(flags)) { 116853344Speter device_t masterdev; 116953344Speter 117051078Speter com->multiport = TRUE; 117151078Speter printf(" (multiport"); 117251078Speter if (unit == COM_MPMASTER(flags)) 117351078Speter printf(" master"); 117451078Speter printf(")"); 117553344Speter masterdev = devclass_get_device(sio_devclass, 117653344Speter COM_MPMASTER(flags)); 117757234Sbde com->no_irq = (masterdev == NULL || bus_get_resource(masterdev, 117857234Sbde SYS_RES_IRQ, 0, NULL, NULL) != 0); 117951078Speter } 118051078Speter#endif /* COM_MULTIPORT */ 118151078Speter if (unit == comconsole) 118251078Speter printf(", console"); 118353344Speter if (COM_IIR_TXRDYBUG(flags)) 118451078Speter printf(" with a bogus IIR_TXRDY register"); 118551078Speter printf("\n"); 118651078Speter 118751078Speter if (!sio_registered) { 118851078Speter register_swi(SWI_TTY, siopoll); 118951078Speter sio_registered = TRUE; 119051078Speter } 119151078Speter make_dev(&sio_cdevsw, unit, 119251078Speter UID_ROOT, GID_WHEEL, 0600, "ttyd%r", unit); 119351078Speter make_dev(&sio_cdevsw, unit | CONTROL_INIT_STATE, 119451078Speter UID_ROOT, GID_WHEEL, 0600, "ttyid%r", unit); 119551078Speter make_dev(&sio_cdevsw, unit | CONTROL_LOCK_STATE, 119651078Speter UID_ROOT, GID_WHEEL, 0600, "ttyld%r", unit); 119751078Speter make_dev(&sio_cdevsw, unit | CALLOUT_MASK, 119851078Speter UID_UUCP, GID_DIALER, 0660, "cuaa%r", unit); 119951078Speter make_dev(&sio_cdevsw, unit | CALLOUT_MASK | CONTROL_INIT_STATE, 120051078Speter UID_UUCP, GID_DIALER, 0660, "cuaia%r", unit); 120151078Speter make_dev(&sio_cdevsw, unit | CALLOUT_MASK | CONTROL_LOCK_STATE, 120251078Speter UID_UUCP, GID_DIALER, 0660, "cuala%r", unit); 120351078Speter com->flags = flags; 120451078Speter com->pps.ppscap = PPS_CAPTUREASSERT | PPS_CAPTURECLEAR; 120551078Speter pps_init(&com->pps); 120651078Speter 120751078Speter rid = 0; 120851078Speter com->irqres = bus_alloc_resource(dev, SYS_RES_IRQ, &rid, 0ul, ~0ul, 1, 120953344Speter RF_ACTIVE); 121053344Speter if (com->irqres) { 121153344Speter ret = BUS_SETUP_INTR(device_get_parent(dev), dev, com->irqres, 121254194Speter INTR_TYPE_TTY | INTR_TYPE_FAST, 121354386Simp siointr, com, &com->cookie); 121454194Speter if (ret) { 121554194Speter ret = BUS_SETUP_INTR(device_get_parent(dev), dev, 121654194Speter com->irqres, INTR_TYPE_TTY, 121754386Simp siointr, com, &com->cookie); 121854194Speter if (ret == 0) 121954194Speter device_printf(dev, "unable to activate interrupt in fast mode - using normal mode"); 122054194Speter } 122153344Speter if (ret) 122253344Speter device_printf(dev, "could not activate interrupt\n"); 122353344Speter } 122451078Speter 122551078Speter return (0); 122651078Speter} 122751078Speter 122851078Speterstatic int 122951078Spetersioopen(dev, flag, mode, p) 123051078Speter dev_t dev; 123151078Speter int flag; 123251078Speter int mode; 123351078Speter struct proc *p; 123451078Speter{ 123551078Speter struct com_s *com; 123651078Speter int error; 123751078Speter Port_t iobase; 123851078Speter int mynor; 123951078Speter int s; 124051078Speter struct tty *tp; 124151078Speter int unit; 124251078Speter 124351078Speter mynor = minor(dev); 124451078Speter unit = MINOR_TO_UNIT(mynor); 124553344Speter com = com_addr(unit); 124653344Speter if (com == NULL) 124751078Speter return (ENXIO); 124851078Speter if (com->gone) 124951078Speter return (ENXIO); 125051078Speter if (mynor & CONTROL_MASK) 125151078Speter return (0); 125251078Speter tp = dev->si_tty = com->tp = ttymalloc(com->tp); 125351078Speter s = spltty(); 125451078Speter /* 125551078Speter * We jump to this label after all non-interrupted sleeps to pick 125651078Speter * up any changes of the device state. 125751078Speter */ 125851078Speteropen_top: 125951078Speter while (com->state & CS_DTR_OFF) { 126051078Speter error = tsleep(&com->dtr_wait, TTIPRI | PCATCH, "siodtr", 0); 126151078Speter if (com_addr(unit) == NULL) 126251078Speter return (ENXIO); 126351078Speter if (error != 0 || com->gone) 126451078Speter goto out; 126551078Speter } 126651078Speter if (tp->t_state & TS_ISOPEN) { 126751078Speter /* 126851078Speter * The device is open, so everything has been initialized. 126951078Speter * Handle conflicts. 127051078Speter */ 127151078Speter if (mynor & CALLOUT_MASK) { 127251078Speter if (!com->active_out) { 127351078Speter error = EBUSY; 127451078Speter goto out; 127551078Speter } 127651078Speter } else { 127751078Speter if (com->active_out) { 127851078Speter if (flag & O_NONBLOCK) { 127951078Speter error = EBUSY; 128051078Speter goto out; 128151078Speter } 128251078Speter error = tsleep(&com->active_out, 128351078Speter TTIPRI | PCATCH, "siobi", 0); 128451078Speter if (com_addr(unit) == NULL) 128551078Speter return (ENXIO); 128651078Speter if (error != 0 || com->gone) 128751078Speter goto out; 128851078Speter goto open_top; 128951078Speter } 129051078Speter } 129151078Speter if (tp->t_state & TS_XCLUDE && 129251078Speter suser(p)) { 129351078Speter error = EBUSY; 129451078Speter goto out; 129551078Speter } 129651078Speter } else { 129751078Speter /* 129851078Speter * The device isn't open, so there are no conflicts. 129951078Speter * Initialize it. Initialization is done twice in many 130051078Speter * cases: to preempt sleeping callin opens if we are 130151078Speter * callout, and to complete a callin open after DCD rises. 130251078Speter */ 130351078Speter tp->t_oproc = comstart; 130451078Speter tp->t_param = comparam; 130551654Sphk tp->t_stop = comstop; 130651078Speter tp->t_dev = dev; 130751078Speter tp->t_termios = mynor & CALLOUT_MASK 130851078Speter ? com->it_out : com->it_in; 130951078Speter (void)commctl(com, TIOCM_DTR | TIOCM_RTS, DMSET); 131051078Speter com->poll = com->no_irq; 131151078Speter com->poll_output = com->loses_outints; 131251078Speter ++com->wopeners; 131351078Speter error = comparam(tp, &tp->t_termios); 131451078Speter --com->wopeners; 131551078Speter if (error != 0) 131651078Speter goto out; 131751078Speter /* 131851078Speter * XXX we should goto open_top if comparam() slept. 131951078Speter */ 132051078Speter iobase = com->iobase; 132151078Speter if (com->hasfifo) { 132251078Speter /* 132351078Speter * (Re)enable and drain fifos. 132451078Speter * 132551078Speter * Certain SMC chips cause problems if the fifos 132651078Speter * are enabled while input is ready. Turn off the 132751078Speter * fifo if necessary to clear the input. We test 132851078Speter * the input ready bit after enabling the fifos 132951078Speter * since we've already enabled them in comparam() 133051078Speter * and to handle races between enabling and fresh 133151078Speter * input. 133251078Speter */ 133351078Speter while (TRUE) { 133451078Speter outb(iobase + com_fifo, 133551078Speter FIFO_RCV_RST | FIFO_XMT_RST 133651078Speter | com->fifo_image); 133751078Speter /* 133851078Speter * XXX the delays are for superstitious 133951078Speter * historical reasons. It must be less than 134051078Speter * the character time at the maximum 134151078Speter * supported speed (87 usec at 115200 bps 134251078Speter * 8N1). Otherwise we might loop endlessly 134351078Speter * if data is streaming in. We used to use 134451078Speter * delays of 100. That usually worked 134551078Speter * because DELAY(100) used to usually delay 134651078Speter * for about 85 usec instead of 100. 134751078Speter */ 134851078Speter DELAY(50); 134951078Speter if (!(inb(com->line_status_port) & LSR_RXRDY)) 135051078Speter break; 135151078Speter outb(iobase + com_fifo, 0); 135251078Speter DELAY(50); 135351078Speter (void) inb(com->data_port); 135451078Speter } 135551078Speter } 135651078Speter 135751078Speter disable_intr(); 135851078Speter (void) inb(com->line_status_port); 135951078Speter (void) inb(com->data_port); 136051078Speter com->prev_modem_status = com->last_modem_status 136151078Speter = inb(com->modem_status_port); 136251078Speter if (COM_IIR_TXRDYBUG(com->flags)) { 136351078Speter outb(com->intr_ctl_port, IER_ERXRDY | IER_ERLS 136451078Speter | IER_EMSC); 136551078Speter } else { 136651078Speter outb(com->intr_ctl_port, IER_ERXRDY | IER_ETXRDY 136751078Speter | IER_ERLS | IER_EMSC); 136851078Speter } 136951078Speter enable_intr(); 137051078Speter /* 137151078Speter * Handle initial DCD. Callout devices get a fake initial 137251078Speter * DCD (trapdoor DCD). If we are callout, then any sleeping 137351078Speter * callin opens get woken up and resume sleeping on "siobi" 137451078Speter * instead of "siodcd". 137551078Speter */ 137651078Speter /* 137751078Speter * XXX `mynor & CALLOUT_MASK' should be 137851078Speter * `tp->t_cflag & (SOFT_CARRIER | TRAPDOOR_CARRIER) where 137951078Speter * TRAPDOOR_CARRIER is the default initial state for callout 138051078Speter * devices and SOFT_CARRIER is like CLOCAL except it hides 138151078Speter * the true carrier. 138251078Speter */ 138351078Speter if (com->prev_modem_status & MSR_DCD || mynor & CALLOUT_MASK) 138451078Speter (*linesw[tp->t_line].l_modem)(tp, 1); 138551078Speter } 138651078Speter /* 138751078Speter * Wait for DCD if necessary. 138851078Speter */ 138951078Speter if (!(tp->t_state & TS_CARR_ON) && !(mynor & CALLOUT_MASK) 139051078Speter && !(tp->t_cflag & CLOCAL) && !(flag & O_NONBLOCK)) { 139151078Speter ++com->wopeners; 139251078Speter error = tsleep(TSA_CARR_ON(tp), TTIPRI | PCATCH, "siodcd", 0); 139351078Speter if (com_addr(unit) == NULL) 139451078Speter return (ENXIO); 139551078Speter --com->wopeners; 139651078Speter if (error != 0 || com->gone) 139751078Speter goto out; 139851078Speter goto open_top; 139951078Speter } 140051078Speter error = (*linesw[tp->t_line].l_open)(dev, tp); 140151078Speter disc_optim(tp, &tp->t_termios, com); 140251078Speter if (tp->t_state & TS_ISOPEN && mynor & CALLOUT_MASK) 140351078Speter com->active_out = TRUE; 140451078Speter siosettimeout(); 140551078Speterout: 140651078Speter splx(s); 140751078Speter if (!(tp->t_state & TS_ISOPEN) && com->wopeners == 0) 140851078Speter comhardclose(com); 140951078Speter return (error); 141051078Speter} 141151078Speter 141251078Speterstatic int 141351078Spetersioclose(dev, flag, mode, p) 141451078Speter dev_t dev; 141551078Speter int flag; 141651078Speter int mode; 141751078Speter struct proc *p; 141851078Speter{ 141951078Speter struct com_s *com; 142051078Speter int mynor; 142151078Speter int s; 142251078Speter struct tty *tp; 142351078Speter 142451078Speter mynor = minor(dev); 142551078Speter if (mynor & CONTROL_MASK) 142651078Speter return (0); 142751078Speter com = com_addr(MINOR_TO_UNIT(mynor)); 142851078Speter tp = com->tp; 142951078Speter s = spltty(); 143051078Speter (*linesw[tp->t_line].l_close)(tp, flag); 143151078Speter disc_optim(tp, &tp->t_termios, com); 143251654Sphk comstop(tp, FREAD | FWRITE); 143351078Speter comhardclose(com); 143451078Speter ttyclose(tp); 143551078Speter siosettimeout(); 143651078Speter splx(s); 143751078Speter if (com->gone) { 143851078Speter printf("sio%d: gone\n", com->unit); 143951078Speter s = spltty(); 144051078Speter if (com->ibuf != NULL) 144151078Speter free(com->ibuf, M_DEVBUF); 144251078Speter bzero(tp, sizeof *tp); 144351078Speter splx(s); 144451078Speter } 144551078Speter return (0); 144651078Speter} 144751078Speter 144851078Speterstatic void 144951078Spetercomhardclose(com) 145051078Speter struct com_s *com; 145151078Speter{ 145251078Speter Port_t iobase; 145351078Speter int s; 145451078Speter struct tty *tp; 145551078Speter int unit; 145651078Speter 145751078Speter unit = com->unit; 145851078Speter iobase = com->iobase; 145951078Speter s = spltty(); 146051078Speter com->poll = FALSE; 146151078Speter com->poll_output = FALSE; 146251078Speter com->do_timestamp = FALSE; 146351078Speter com->do_dcd_timestamp = FALSE; 146451078Speter com->pps.ppsparam.mode = 0; 146551078Speter outb(iobase + com_cfcr, com->cfcr_image &= ~CFCR_SBREAK); 146651078Speter { 146751078Speter outb(iobase + com_ier, 0); 146851078Speter tp = com->tp; 146951078Speter if (tp->t_cflag & HUPCL 147051078Speter /* 147151078Speter * XXX we will miss any carrier drop between here and the 147251078Speter * next open. Perhaps we should watch DCD even when the 147351078Speter * port is closed; it is not sufficient to check it at 147451078Speter * the next open because it might go up and down while 147551078Speter * we're not watching. 147651078Speter */ 147751078Speter || (!com->active_out 147851078Speter && !(com->prev_modem_status & MSR_DCD) 147951078Speter && !(com->it_in.c_cflag & CLOCAL)) 148051078Speter || !(tp->t_state & TS_ISOPEN)) { 148151078Speter (void)commctl(com, TIOCM_DTR, DMBIC); 148251078Speter if (com->dtr_wait != 0 && !(com->state & CS_DTR_OFF)) { 148351078Speter timeout(siodtrwakeup, com, com->dtr_wait); 148451078Speter com->state |= CS_DTR_OFF; 148551078Speter } 148651078Speter } 148751078Speter } 148851078Speter if (com->hasfifo) { 148951078Speter /* 149051078Speter * Disable fifos so that they are off after controlled 149151078Speter * reboots. Some BIOSes fail to detect 16550s when the 149251078Speter * fifos are enabled. 149351078Speter */ 149451078Speter outb(iobase + com_fifo, 0); 149551078Speter } 149651078Speter com->active_out = FALSE; 149751078Speter wakeup(&com->active_out); 149851078Speter wakeup(TSA_CARR_ON(tp)); /* restart any wopeners */ 149951078Speter splx(s); 150051078Speter} 150151078Speter 150251078Speterstatic int 150351078Spetersioread(dev, uio, flag) 150451078Speter dev_t dev; 150551078Speter struct uio *uio; 150651078Speter int flag; 150751078Speter{ 150851078Speter int mynor; 150951078Speter struct com_s *com; 151051078Speter 151151078Speter mynor = minor(dev); 151251078Speter if (mynor & CONTROL_MASK) 151351078Speter return (ENODEV); 151451078Speter com = com_addr(MINOR_TO_UNIT(mynor)); 151551078Speter if (com->gone) 151651078Speter return (ENODEV); 151751078Speter return ((*linesw[com->tp->t_line].l_read)(com->tp, uio, flag)); 151851078Speter} 151951078Speter 152051078Speterstatic int 152151078Spetersiowrite(dev, uio, flag) 152251078Speter dev_t dev; 152351078Speter struct uio *uio; 152451078Speter int flag; 152551078Speter{ 152651078Speter int mynor; 152751078Speter struct com_s *com; 152851078Speter int unit; 152951078Speter 153051078Speter mynor = minor(dev); 153151078Speter if (mynor & CONTROL_MASK) 153251078Speter return (ENODEV); 153351078Speter 153451078Speter unit = MINOR_TO_UNIT(mynor); 153551078Speter com = com_addr(unit); 153651078Speter if (com->gone) 153751078Speter return (ENODEV); 153851078Speter /* 153951078Speter * (XXX) We disallow virtual consoles if the physical console is 154051078Speter * a serial port. This is in case there is a display attached that 154151078Speter * is not the console. In that situation we don't need/want the X 154251078Speter * server taking over the console. 154351078Speter */ 154451078Speter if (constty != NULL && unit == comconsole) 154551078Speter constty = NULL; 154651078Speter return ((*linesw[com->tp->t_line].l_write)(com->tp, uio, flag)); 154751078Speter} 154851078Speter 154951078Speterstatic void 155051078Spetersiobusycheck(chan) 155151078Speter void *chan; 155251078Speter{ 155351078Speter struct com_s *com; 155451078Speter int s; 155551078Speter 155651078Speter com = (struct com_s *)chan; 155751078Speter 155851078Speter /* 155951078Speter * Clear TS_BUSY if low-level output is complete. 156051078Speter * spl locking is sufficient because siointr1() does not set CS_BUSY. 156151078Speter * If siointr1() clears CS_BUSY after we look at it, then we'll get 156251078Speter * called again. Reading the line status port outside of siointr1() 156351078Speter * is safe because CS_BUSY is clear so there are no output interrupts 156451078Speter * to lose. 156551078Speter */ 156651078Speter s = spltty(); 156751078Speter if (com->state & CS_BUSY) 156851078Speter com->extra_state &= ~CSE_BUSYCHECK; /* False alarm. */ 156951078Speter else if ((inb(com->line_status_port) & (LSR_TSRE | LSR_TXRDY)) 157051078Speter == (LSR_TSRE | LSR_TXRDY)) { 157151078Speter com->tp->t_state &= ~TS_BUSY; 157251078Speter ttwwakeup(com->tp); 157351078Speter com->extra_state &= ~CSE_BUSYCHECK; 157451078Speter } else 157551078Speter timeout(siobusycheck, com, hz / 100); 157651078Speter splx(s); 157751078Speter} 157851078Speter 157951078Speterstatic void 158051078Spetersiodtrwakeup(chan) 158151078Speter void *chan; 158251078Speter{ 158351078Speter struct com_s *com; 158451078Speter 158551078Speter com = (struct com_s *)chan; 158651078Speter com->state &= ~CS_DTR_OFF; 158751078Speter wakeup(&com->dtr_wait); 158851078Speter} 158951078Speter 159051078Speterstatic void 159151078Spetersioinput(com) 159251078Speter struct com_s *com; 159351078Speter{ 159451078Speter u_char *buf; 159551078Speter int incc; 159651078Speter u_char line_status; 159751078Speter int recv_data; 159851078Speter struct tty *tp; 159951078Speter 160051078Speter buf = com->ibuf; 160151078Speter tp = com->tp; 160251078Speter if (!(tp->t_state & TS_ISOPEN) || !(tp->t_cflag & CREAD)) { 160351078Speter com_events -= (com->iptr - com->ibuf); 160451078Speter com->iptr = com->ibuf; 160551078Speter return; 160651078Speter } 160751078Speter if (tp->t_state & TS_CAN_BYPASS_L_RINT) { 160851078Speter /* 160951078Speter * Avoid the grotesquely inefficient lineswitch routine 161051078Speter * (ttyinput) in "raw" mode. It usually takes about 450 161151078Speter * instructions (that's without canonical processing or echo!). 161251078Speter * slinput is reasonably fast (usually 40 instructions plus 161351078Speter * call overhead). 161451078Speter */ 161551078Speter do { 161651078Speter enable_intr(); 161751078Speter incc = com->iptr - buf; 161851078Speter if (tp->t_rawq.c_cc + incc > tp->t_ihiwat 161951078Speter && (com->state & CS_RTS_IFLOW 162051078Speter || tp->t_iflag & IXOFF) 162151078Speter && !(tp->t_state & TS_TBLOCK)) 162251078Speter ttyblock(tp); 162351078Speter com->delta_error_counts[CE_TTY_BUF_OVERFLOW] 162451078Speter += b_to_q((char *)buf, incc, &tp->t_rawq); 162551078Speter buf += incc; 162651078Speter tk_nin += incc; 162751078Speter tk_rawcc += incc; 162851078Speter tp->t_rawcc += incc; 162951078Speter ttwakeup(tp); 163051078Speter if (tp->t_state & TS_TTSTOP 163151078Speter && (tp->t_iflag & IXANY 163251078Speter || tp->t_cc[VSTART] == tp->t_cc[VSTOP])) { 163351078Speter tp->t_state &= ~TS_TTSTOP; 163451078Speter tp->t_lflag &= ~FLUSHO; 163551078Speter comstart(tp); 163651078Speter } 163751078Speter disable_intr(); 163851078Speter } while (buf < com->iptr); 163951078Speter } else { 164051078Speter do { 164151078Speter enable_intr(); 164251078Speter line_status = buf[com->ierroff]; 164351078Speter recv_data = *buf++; 164451078Speter if (line_status 164551078Speter & (LSR_BI | LSR_FE | LSR_OE | LSR_PE)) { 164651078Speter if (line_status & LSR_BI) 164751078Speter recv_data |= TTY_BI; 164851078Speter if (line_status & LSR_FE) 164951078Speter recv_data |= TTY_FE; 165051078Speter if (line_status & LSR_OE) 165151078Speter recv_data |= TTY_OE; 165251078Speter if (line_status & LSR_PE) 165351078Speter recv_data |= TTY_PE; 165451078Speter } 165551078Speter (*linesw[tp->t_line].l_rint)(recv_data, tp); 165651078Speter disable_intr(); 165751078Speter } while (buf < com->iptr); 165851078Speter } 165951078Speter com_events -= (com->iptr - com->ibuf); 166051078Speter com->iptr = com->ibuf; 166151078Speter 166251078Speter /* 166351078Speter * There is now room for another low-level buffer full of input, 166451078Speter * so enable RTS if it is now disabled and there is room in the 166551078Speter * high-level buffer. 166651078Speter */ 166751078Speter if ((com->state & CS_RTS_IFLOW) && !(com->mcr_image & MCR_RTS) && 166851078Speter !(tp->t_state & TS_TBLOCK)) 166951078Speter outb(com->modem_ctl_port, com->mcr_image |= MCR_RTS); 167051078Speter} 167151078Speter 167251078Spetervoid 167351078Spetersiointr(arg) 167451078Speter void *arg; 167551078Speter{ 167651078Speter#ifndef COM_MULTIPORT 167751078Speter COM_LOCK(); 167851078Speter siointr1((struct com_s *) arg); 167951078Speter COM_UNLOCK(); 168051078Speter#else /* COM_MULTIPORT */ 168151078Speter bool_t possibly_more_intrs; 168251078Speter int unit; 168351078Speter struct com_s *com; 168451078Speter 168551078Speter /* 168651078Speter * Loop until there is no activity on any port. This is necessary 168751078Speter * to get an interrupt edge more than to avoid another interrupt. 168851078Speter * If the IRQ signal is just an OR of the IRQ signals from several 168951078Speter * devices, then the edge from one may be lost because another is 169051078Speter * on. 169151078Speter */ 169251078Speter COM_LOCK(); 169351078Speter do { 169451078Speter possibly_more_intrs = FALSE; 169553344Speter for (unit = 0; unit < sio_numunits; ++unit) { 169651078Speter com = com_addr(unit); 169751078Speter /* 169851078Speter * XXX COM_LOCK(); 169951078Speter * would it work here, or be counter-productive? 170051078Speter */ 170151078Speter if (com != NULL 170251078Speter && !com->gone 170351078Speter && (inb(com->int_id_port) & IIR_IMASK) 170451078Speter != IIR_NOPEND) { 170551078Speter siointr1(com); 170651078Speter possibly_more_intrs = TRUE; 170751078Speter } 170851078Speter /* XXX COM_UNLOCK(); */ 170951078Speter } 171051078Speter } while (possibly_more_intrs); 171151078Speter COM_UNLOCK(); 171251078Speter#endif /* COM_MULTIPORT */ 171351078Speter} 171451078Speter 171551078Speterstatic void 171651078Spetersiointr1(com) 171751078Speter struct com_s *com; 171851078Speter{ 171951078Speter u_char line_status; 172051078Speter u_char modem_status; 172151078Speter u_char *ioptr; 172251078Speter u_char recv_data; 172351078Speter u_char int_ctl; 172451078Speter u_char int_ctl_new; 172551078Speter struct timecounter *tc; 172651078Speter u_int count; 172751078Speter 172851078Speter int_ctl = inb(com->intr_ctl_port); 172951078Speter int_ctl_new = int_ctl; 173051078Speter 173151078Speter while (!com->gone) { 173251078Speter if (com->pps.ppsparam.mode & PPS_CAPTUREBOTH) { 173351078Speter modem_status = inb(com->modem_status_port); 173451078Speter if ((modem_status ^ com->last_modem_status) & MSR_DCD) { 173551078Speter tc = timecounter; 173651078Speter count = tc->tc_get_timecount(tc); 173751078Speter pps_event(&com->pps, tc, count, 173851078Speter (modem_status & MSR_DCD) ? 173951078Speter PPS_CAPTUREASSERT : PPS_CAPTURECLEAR); 174051078Speter } 174151078Speter } 174251078Speter line_status = inb(com->line_status_port); 174351078Speter 174451078Speter /* input event? (check first to help avoid overruns) */ 174551078Speter while (line_status & LSR_RCV_MASK) { 174651078Speter /* break/unnattached error bits or real input? */ 174751078Speter if (!(line_status & LSR_RXRDY)) 174851078Speter recv_data = 0; 174951078Speter else 175051078Speter recv_data = inb(com->data_port); 175151078Speter if (line_status & (LSR_BI | LSR_FE | LSR_PE)) { 175251078Speter /* 175351078Speter * Don't store BI if IGNBRK or FE/PE if IGNPAR. 175451078Speter * Otherwise, push the work to a higher level 175551078Speter * (to handle PARMRK) if we're bypassing. 175651078Speter * Otherwise, convert BI/FE and PE+INPCK to 0. 175751078Speter * 175851078Speter * This makes bypassing work right in the 175951078Speter * usual "raw" case (IGNBRK set, and IGNPAR 176051078Speter * and INPCK clear). 176151078Speter * 176251078Speter * Note: BI together with FE/PE means just BI. 176351078Speter */ 176451078Speter if (line_status & LSR_BI) { 176551078Speter#if defined(DDB) && defined(BREAK_TO_DEBUGGER) 176651078Speter if (com->unit == comconsole) { 176751078Speter breakpoint(); 176851078Speter goto cont; 176951078Speter } 177051078Speter#endif 177151078Speter if (com->tp == NULL 177251078Speter || com->tp->t_iflag & IGNBRK) 177351078Speter goto cont; 177451078Speter } else { 177551078Speter if (com->tp == NULL 177651078Speter || com->tp->t_iflag & IGNPAR) 177751078Speter goto cont; 177851078Speter } 177951078Speter if (com->tp->t_state & TS_CAN_BYPASS_L_RINT 178051078Speter && (line_status & (LSR_BI | LSR_FE) 178151078Speter || com->tp->t_iflag & INPCK)) 178251078Speter recv_data = 0; 178351078Speter } 178451078Speter ++com->bytes_in; 178551078Speter if (com->hotchar != 0 && recv_data == com->hotchar) 178651078Speter setsofttty(); 178751078Speter ioptr = com->iptr; 178851078Speter if (ioptr >= com->ibufend) 178951078Speter CE_RECORD(com, CE_INTERRUPT_BUF_OVERFLOW); 179051078Speter else { 179151078Speter if (com->do_timestamp) 179251078Speter microtime(&com->timestamp); 179351078Speter ++com_events; 179451078Speter schedsofttty(); 179551078Speter#if 0 /* for testing input latency vs efficiency */ 179651078Speterif (com->iptr - com->ibuf == 8) 179751078Speter setsofttty(); 179851078Speter#endif 179951078Speter ioptr[0] = recv_data; 180051078Speter ioptr[com->ierroff] = line_status; 180151078Speter com->iptr = ++ioptr; 180251078Speter if (ioptr == com->ihighwater 180351078Speter && com->state & CS_RTS_IFLOW) 180451078Speter outb(com->modem_ctl_port, 180551078Speter com->mcr_image &= ~MCR_RTS); 180651078Speter if (line_status & LSR_OE) 180751078Speter CE_RECORD(com, CE_OVERRUN); 180851078Speter } 180951078Spetercont: 181051078Speter /* 181151078Speter * "& 0x7F" is to avoid the gcc-1.40 generating a slow 181251078Speter * jump from the top of the loop to here 181351078Speter */ 181451078Speter line_status = inb(com->line_status_port) & 0x7F; 181551078Speter } 181651078Speter 181751078Speter /* modem status change? (always check before doing output) */ 181851078Speter modem_status = inb(com->modem_status_port); 181951078Speter if (modem_status != com->last_modem_status) { 182051078Speter if (com->do_dcd_timestamp 182151078Speter && !(com->last_modem_status & MSR_DCD) 182251078Speter && modem_status & MSR_DCD) 182351078Speter microtime(&com->dcd_timestamp); 182451078Speter 182551078Speter /* 182651078Speter * Schedule high level to handle DCD changes. Note 182751078Speter * that we don't use the delta bits anywhere. Some 182851078Speter * UARTs mess them up, and it's easy to remember the 182951078Speter * previous bits and calculate the delta. 183051078Speter */ 183151078Speter com->last_modem_status = modem_status; 183251078Speter if (!(com->state & CS_CHECKMSR)) { 183351078Speter com_events += LOTS_OF_EVENTS; 183451078Speter com->state |= CS_CHECKMSR; 183551078Speter setsofttty(); 183651078Speter } 183751078Speter 183851078Speter /* handle CTS change immediately for crisp flow ctl */ 183951078Speter if (com->state & CS_CTS_OFLOW) { 184051078Speter if (modem_status & MSR_CTS) 184151078Speter com->state |= CS_ODEVREADY; 184251078Speter else 184351078Speter com->state &= ~CS_ODEVREADY; 184451078Speter } 184551078Speter } 184651078Speter 184751078Speter /* output queued and everything ready? */ 184851078Speter if (line_status & LSR_TXRDY 184951078Speter && com->state >= (CS_BUSY | CS_TTGO | CS_ODEVREADY)) { 185051078Speter ioptr = com->obufq.l_head; 185151078Speter if (com->tx_fifo_size > 1) { 185251078Speter u_int ocount; 185351078Speter 185451078Speter ocount = com->obufq.l_tail - ioptr; 185551078Speter if (ocount > com->tx_fifo_size) 185651078Speter ocount = com->tx_fifo_size; 185751078Speter com->bytes_out += ocount; 185851078Speter do 185951078Speter outb(com->data_port, *ioptr++); 186051078Speter while (--ocount != 0); 186151078Speter } else { 186251078Speter outb(com->data_port, *ioptr++); 186351078Speter ++com->bytes_out; 186451078Speter } 186551078Speter com->obufq.l_head = ioptr; 186651078Speter if (COM_IIR_TXRDYBUG(com->flags)) { 186751078Speter int_ctl_new = int_ctl | IER_ETXRDY; 186851078Speter } 186951078Speter if (ioptr >= com->obufq.l_tail) { 187051078Speter struct lbq *qp; 187151078Speter 187251078Speter qp = com->obufq.l_next; 187351078Speter qp->l_queued = FALSE; 187451078Speter qp = qp->l_next; 187551078Speter if (qp != NULL) { 187651078Speter com->obufq.l_head = qp->l_head; 187751078Speter com->obufq.l_tail = qp->l_tail; 187851078Speter com->obufq.l_next = qp; 187951078Speter } else { 188051078Speter /* output just completed */ 188153344Speter if (COM_IIR_TXRDYBUG(com->flags)) { 188251078Speter int_ctl_new = int_ctl & ~IER_ETXRDY; 188351078Speter } 188451078Speter com->state &= ~CS_BUSY; 188551078Speter } 188651078Speter if (!(com->state & CS_ODONE)) { 188751078Speter com_events += LOTS_OF_EVENTS; 188851078Speter com->state |= CS_ODONE; 188951078Speter setsofttty(); /* handle at high level ASAP */ 189051078Speter } 189151078Speter } 189253344Speter if (COM_IIR_TXRDYBUG(com->flags) && (int_ctl != int_ctl_new)) { 189351078Speter outb(com->intr_ctl_port, int_ctl_new); 189451078Speter } 189551078Speter } 189651078Speter 189751078Speter /* finished? */ 189851078Speter#ifndef COM_MULTIPORT 189951078Speter if ((inb(com->int_id_port) & IIR_IMASK) == IIR_NOPEND) 190051078Speter#endif /* COM_MULTIPORT */ 190151078Speter return; 190251078Speter } 190351078Speter} 190451078Speter 190551078Speterstatic int 190651078Spetersioioctl(dev, cmd, data, flag, p) 190751078Speter dev_t dev; 190851078Speter u_long cmd; 190951078Speter caddr_t data; 191051078Speter int flag; 191151078Speter struct proc *p; 191251078Speter{ 191351078Speter struct com_s *com; 191451078Speter int error; 191551078Speter Port_t iobase; 191651078Speter int mynor; 191751078Speter int s; 191851078Speter struct tty *tp; 191951078Speter#if defined(COMPAT_43) || defined(COMPAT_SUNOS) 192051078Speter u_long oldcmd; 192151078Speter struct termios term; 192251078Speter#endif 192351078Speter 192451078Speter mynor = minor(dev); 192551078Speter com = com_addr(MINOR_TO_UNIT(mynor)); 192651078Speter if (com->gone) 192751078Speter return (ENODEV); 192851078Speter iobase = com->iobase; 192951078Speter if (mynor & CONTROL_MASK) { 193051078Speter struct termios *ct; 193151078Speter 193251078Speter switch (mynor & CONTROL_MASK) { 193351078Speter case CONTROL_INIT_STATE: 193451078Speter ct = mynor & CALLOUT_MASK ? &com->it_out : &com->it_in; 193551078Speter break; 193651078Speter case CONTROL_LOCK_STATE: 193751078Speter ct = mynor & CALLOUT_MASK ? &com->lt_out : &com->lt_in; 193851078Speter break; 193951078Speter default: 194051078Speter return (ENODEV); /* /dev/nodev */ 194151078Speter } 194251078Speter switch (cmd) { 194351078Speter case TIOCSETA: 194451078Speter error = suser(p); 194551078Speter if (error != 0) 194651078Speter return (error); 194751078Speter *ct = *(struct termios *)data; 194851078Speter return (0); 194951078Speter case TIOCGETA: 195051078Speter *(struct termios *)data = *ct; 195151078Speter return (0); 195251078Speter case TIOCGETD: 195351078Speter *(int *)data = TTYDISC; 195451078Speter return (0); 195551078Speter case TIOCGWINSZ: 195651078Speter bzero(data, sizeof(struct winsize)); 195751078Speter return (0); 195851078Speter default: 195951078Speter return (ENOTTY); 196051078Speter } 196151078Speter } 196251078Speter tp = com->tp; 196351078Speter#if defined(COMPAT_43) || defined(COMPAT_SUNOS) 196451078Speter term = tp->t_termios; 196551078Speter oldcmd = cmd; 196651078Speter error = ttsetcompat(tp, &cmd, data, &term); 196751078Speter if (error != 0) 196851078Speter return (error); 196951078Speter if (cmd != oldcmd) 197051078Speter data = (caddr_t)&term; 197151078Speter#endif 197251078Speter if (cmd == TIOCSETA || cmd == TIOCSETAW || cmd == TIOCSETAF) { 197351078Speter int cc; 197451078Speter struct termios *dt = (struct termios *)data; 197551078Speter struct termios *lt = mynor & CALLOUT_MASK 197651078Speter ? &com->lt_out : &com->lt_in; 197751078Speter 197851078Speter dt->c_iflag = (tp->t_iflag & lt->c_iflag) 197951078Speter | (dt->c_iflag & ~lt->c_iflag); 198051078Speter dt->c_oflag = (tp->t_oflag & lt->c_oflag) 198151078Speter | (dt->c_oflag & ~lt->c_oflag); 198251078Speter dt->c_cflag = (tp->t_cflag & lt->c_cflag) 198351078Speter | (dt->c_cflag & ~lt->c_cflag); 198451078Speter dt->c_lflag = (tp->t_lflag & lt->c_lflag) 198551078Speter | (dt->c_lflag & ~lt->c_lflag); 198651078Speter for (cc = 0; cc < NCCS; ++cc) 198751078Speter if (lt->c_cc[cc] != 0) 198851078Speter dt->c_cc[cc] = tp->t_cc[cc]; 198951078Speter if (lt->c_ispeed != 0) 199051078Speter dt->c_ispeed = tp->t_ispeed; 199151078Speter if (lt->c_ospeed != 0) 199251078Speter dt->c_ospeed = tp->t_ospeed; 199351078Speter } 199451078Speter error = (*linesw[tp->t_line].l_ioctl)(tp, cmd, data, flag, p); 199551078Speter if (error != ENOIOCTL) 199651078Speter return (error); 199751078Speter s = spltty(); 199851078Speter error = ttioctl(tp, cmd, data, flag); 199951078Speter disc_optim(tp, &tp->t_termios, com); 200051078Speter if (error != ENOIOCTL) { 200151078Speter splx(s); 200251078Speter return (error); 200351078Speter } 200451078Speter switch (cmd) { 200551078Speter case TIOCSBRK: 200651078Speter outb(iobase + com_cfcr, com->cfcr_image |= CFCR_SBREAK); 200751078Speter break; 200851078Speter case TIOCCBRK: 200951078Speter outb(iobase + com_cfcr, com->cfcr_image &= ~CFCR_SBREAK); 201051078Speter break; 201151078Speter case TIOCSDTR: 201251078Speter (void)commctl(com, TIOCM_DTR, DMBIS); 201351078Speter break; 201451078Speter case TIOCCDTR: 201551078Speter (void)commctl(com, TIOCM_DTR, DMBIC); 201651078Speter break; 201751078Speter /* 201851078Speter * XXX should disallow changing MCR_RTS if CS_RTS_IFLOW is set. The 201951078Speter * changes get undone on the next call to comparam(). 202051078Speter */ 202151078Speter case TIOCMSET: 202251078Speter (void)commctl(com, *(int *)data, DMSET); 202351078Speter break; 202451078Speter case TIOCMBIS: 202551078Speter (void)commctl(com, *(int *)data, DMBIS); 202651078Speter break; 202751078Speter case TIOCMBIC: 202851078Speter (void)commctl(com, *(int *)data, DMBIC); 202951078Speter break; 203051078Speter case TIOCMGET: 203151078Speter *(int *)data = commctl(com, 0, DMGET); 203251078Speter break; 203351078Speter case TIOCMSDTRWAIT: 203451078Speter /* must be root since the wait applies to following logins */ 203551078Speter error = suser(p); 203651078Speter if (error != 0) { 203751078Speter splx(s); 203851078Speter return (error); 203951078Speter } 204051078Speter com->dtr_wait = *(int *)data * hz / 100; 204151078Speter break; 204251078Speter case TIOCMGDTRWAIT: 204351078Speter *(int *)data = com->dtr_wait * 100 / hz; 204451078Speter break; 204551078Speter case TIOCTIMESTAMP: 204651078Speter com->do_timestamp = TRUE; 204751078Speter *(struct timeval *)data = com->timestamp; 204851078Speter break; 204951078Speter case TIOCDCDTIMESTAMP: 205051078Speter com->do_dcd_timestamp = TRUE; 205151078Speter *(struct timeval *)data = com->dcd_timestamp; 205251078Speter break; 205351078Speter default: 205451078Speter splx(s); 205551078Speter error = pps_ioctl(cmd, data, &com->pps); 205651078Speter if (error == ENODEV) 205751078Speter error = ENOTTY; 205851078Speter return (error); 205951078Speter } 206051078Speter splx(s); 206151078Speter return (0); 206251078Speter} 206351078Speter 206451078Speterstatic void 206551078Spetersiopoll() 206651078Speter{ 206751078Speter int unit; 206851078Speter 206951078Speter if (com_events == 0) 207051078Speter return; 207151078Speterrepeat: 207253344Speter for (unit = 0; unit < sio_numunits; ++unit) { 207351078Speter struct com_s *com; 207451078Speter int incc; 207551078Speter struct tty *tp; 207651078Speter 207751078Speter com = com_addr(unit); 207851078Speter if (com == NULL) 207951078Speter continue; 208051078Speter tp = com->tp; 208151078Speter if (tp == NULL || com->gone) { 208251078Speter /* 208351078Speter * Discard any events related to never-opened or 208451078Speter * going-away devices. 208551078Speter */ 208651078Speter disable_intr(); 208751078Speter incc = com->iptr - com->ibuf; 208851078Speter com->iptr = com->ibuf; 208951078Speter if (com->state & CS_CHECKMSR) { 209051078Speter incc += LOTS_OF_EVENTS; 209151078Speter com->state &= ~CS_CHECKMSR; 209251078Speter } 209351078Speter com_events -= incc; 209451078Speter enable_intr(); 209551078Speter continue; 209651078Speter } 209751078Speter if (com->iptr != com->ibuf) { 209851078Speter disable_intr(); 209951078Speter sioinput(com); 210051078Speter enable_intr(); 210151078Speter } 210251078Speter if (com->state & CS_CHECKMSR) { 210351078Speter u_char delta_modem_status; 210451078Speter 210551078Speter disable_intr(); 210651078Speter delta_modem_status = com->last_modem_status 210751078Speter ^ com->prev_modem_status; 210851078Speter com->prev_modem_status = com->last_modem_status; 210951078Speter com_events -= LOTS_OF_EVENTS; 211051078Speter com->state &= ~CS_CHECKMSR; 211151078Speter enable_intr(); 211251078Speter if (delta_modem_status & MSR_DCD) 211351078Speter (*linesw[tp->t_line].l_modem) 211451078Speter (tp, com->prev_modem_status & MSR_DCD); 211551078Speter } 211651078Speter if (com->state & CS_ODONE) { 211751078Speter disable_intr(); 211851078Speter com_events -= LOTS_OF_EVENTS; 211951078Speter com->state &= ~CS_ODONE; 212051078Speter enable_intr(); 212151078Speter if (!(com->state & CS_BUSY) 212251078Speter && !(com->extra_state & CSE_BUSYCHECK)) { 212351078Speter timeout(siobusycheck, com, hz / 100); 212451078Speter com->extra_state |= CSE_BUSYCHECK; 212551078Speter } 212651078Speter (*linesw[tp->t_line].l_start)(tp); 212751078Speter } 212851078Speter if (com_events == 0) 212951078Speter break; 213051078Speter } 213151078Speter if (com_events >= LOTS_OF_EVENTS) 213251078Speter goto repeat; 213351078Speter} 213451078Speter 213551078Speterstatic int 213651078Spetercomparam(tp, t) 213751078Speter struct tty *tp; 213851078Speter struct termios *t; 213951078Speter{ 214051078Speter u_int cfcr; 214151078Speter int cflag; 214251078Speter struct com_s *com; 214351078Speter int divisor; 214451078Speter u_char dlbh; 214551078Speter u_char dlbl; 214651078Speter Port_t iobase; 214751078Speter int s; 214851078Speter int unit; 214951078Speter 215051078Speter /* do historical conversions */ 215151078Speter if (t->c_ispeed == 0) 215251078Speter t->c_ispeed = t->c_ospeed; 215351078Speter 215451078Speter /* check requested parameters */ 215551078Speter divisor = ttspeedtab(t->c_ospeed, comspeedtab); 215651078Speter if (divisor < 0 || (divisor > 0 && t->c_ispeed != t->c_ospeed)) 215751078Speter return (EINVAL); 215851078Speter 215951078Speter /* parameters are OK, convert them to the com struct and the device */ 216051078Speter unit = DEV_TO_UNIT(tp->t_dev); 216151078Speter com = com_addr(unit); 216251078Speter iobase = com->iobase; 216351078Speter s = spltty(); 216451078Speter if (divisor == 0) 216551078Speter (void)commctl(com, TIOCM_DTR, DMBIC); /* hang up line */ 216651078Speter else 216751078Speter (void)commctl(com, TIOCM_DTR, DMBIS); 216851078Speter cflag = t->c_cflag; 216951078Speter switch (cflag & CSIZE) { 217051078Speter case CS5: 217151078Speter cfcr = CFCR_5BITS; 217251078Speter break; 217351078Speter case CS6: 217451078Speter cfcr = CFCR_6BITS; 217551078Speter break; 217651078Speter case CS7: 217751078Speter cfcr = CFCR_7BITS; 217851078Speter break; 217951078Speter default: 218051078Speter cfcr = CFCR_8BITS; 218151078Speter break; 218251078Speter } 218351078Speter if (cflag & PARENB) { 218451078Speter cfcr |= CFCR_PENAB; 218551078Speter if (!(cflag & PARODD)) 218651078Speter cfcr |= CFCR_PEVEN; 218751078Speter } 218851078Speter if (cflag & CSTOPB) 218951078Speter cfcr |= CFCR_STOPB; 219051078Speter 219151078Speter if (com->hasfifo && divisor != 0) { 219251078Speter /* 219351078Speter * Use a fifo trigger level low enough so that the input 219451078Speter * latency from the fifo is less than about 16 msec and 219551078Speter * the total latency is less than about 30 msec. These 219651078Speter * latencies are reasonable for humans. Serial comms 219751078Speter * protocols shouldn't expect anything better since modem 219851078Speter * latencies are larger. 219951078Speter */ 220051078Speter com->fifo_image = t->c_ospeed <= 4800 220151078Speter ? FIFO_ENABLE : FIFO_ENABLE | FIFO_RX_HIGH; 220251078Speter#ifdef COM_ESP 220351078Speter /* 220451078Speter * The Hayes ESP card needs the fifo DMA mode bit set 220551078Speter * in compatibility mode. If not, it will interrupt 220651078Speter * for each character received. 220751078Speter */ 220851078Speter if (com->esp) 220951078Speter com->fifo_image |= FIFO_DMA_MODE; 221051078Speter#endif 221151078Speter outb(iobase + com_fifo, com->fifo_image); 221251078Speter } 221351078Speter 221451078Speter /* 221551078Speter * This returns with interrupts disabled so that we can complete 221651078Speter * the speed change atomically. Keeping interrupts disabled is 221751078Speter * especially important while com_data is hidden. 221851078Speter */ 221951078Speter (void) siosetwater(com, t->c_ispeed); 222051078Speter 222151078Speter if (divisor != 0) { 222251078Speter outb(iobase + com_cfcr, cfcr | CFCR_DLAB); 222351078Speter /* 222451078Speter * Only set the divisor registers if they would change, 222551078Speter * since on some 16550 incompatibles (UMC8669F), setting 222651078Speter * them while input is arriving them loses sync until 222751078Speter * data stops arriving. 222851078Speter */ 222951078Speter dlbl = divisor & 0xFF; 223051078Speter if (inb(iobase + com_dlbl) != dlbl) 223151078Speter outb(iobase + com_dlbl, dlbl); 223251078Speter dlbh = (u_int) divisor >> 8; 223351078Speter if (inb(iobase + com_dlbh) != dlbh) 223451078Speter outb(iobase + com_dlbh, dlbh); 223551078Speter } 223651078Speter 223751078Speter 223851078Speter outb(iobase + com_cfcr, com->cfcr_image = cfcr); 223951078Speter 224051078Speter if (!(tp->t_state & TS_TTSTOP)) 224151078Speter com->state |= CS_TTGO; 224251078Speter 224351078Speter if (cflag & CRTS_IFLOW) { 224451078Speter if (com->st16650a) { 224551078Speter outb(iobase + com_cfcr, 0xbf); 224651078Speter outb(iobase + com_fifo, inb(iobase + com_fifo) | 0x40); 224751078Speter } 224851078Speter com->state |= CS_RTS_IFLOW; 224951078Speter /* 225051078Speter * If CS_RTS_IFLOW just changed from off to on, the change 225151078Speter * needs to be propagated to MCR_RTS. This isn't urgent, 225251078Speter * so do it later by calling comstart() instead of repeating 225351078Speter * a lot of code from comstart() here. 225451078Speter */ 225551078Speter } else if (com->state & CS_RTS_IFLOW) { 225651078Speter com->state &= ~CS_RTS_IFLOW; 225751078Speter /* 225851078Speter * CS_RTS_IFLOW just changed from on to off. Force MCR_RTS 225951078Speter * on here, since comstart() won't do it later. 226051078Speter */ 226151078Speter outb(com->modem_ctl_port, com->mcr_image |= MCR_RTS); 226251078Speter if (com->st16650a) { 226351078Speter outb(iobase + com_cfcr, 0xbf); 226451078Speter outb(iobase + com_fifo, inb(iobase + com_fifo) & ~0x40); 226551078Speter } 226651078Speter } 226751078Speter 226851078Speter 226951078Speter /* 227051078Speter * Set up state to handle output flow control. 227151078Speter * XXX - worth handling MDMBUF (DCD) flow control at the lowest level? 227251078Speter * Now has 10+ msec latency, while CTS flow has 50- usec latency. 227351078Speter */ 227451078Speter com->state |= CS_ODEVREADY; 227551078Speter com->state &= ~CS_CTS_OFLOW; 227651078Speter if (cflag & CCTS_OFLOW) { 227751078Speter com->state |= CS_CTS_OFLOW; 227851078Speter if (!(com->last_modem_status & MSR_CTS)) 227951078Speter com->state &= ~CS_ODEVREADY; 228051078Speter if (com->st16650a) { 228151078Speter outb(iobase + com_cfcr, 0xbf); 228251078Speter outb(iobase + com_fifo, inb(iobase + com_fifo) | 0x80); 228351078Speter } 228451078Speter } else { 228551078Speter if (com->st16650a) { 228651078Speter outb(iobase + com_cfcr, 0xbf); 228751078Speter outb(iobase + com_fifo, inb(iobase + com_fifo) & ~0x80); 228851078Speter } 228951078Speter } 229051078Speter 229151078Speter 229251078Speter outb(iobase + com_cfcr, com->cfcr_image); 229351078Speter 229451078Speter 229551078Speter /* XXX shouldn't call functions while intrs are disabled. */ 229651078Speter disc_optim(tp, t, com); 229751078Speter /* 229851078Speter * Recover from fiddling with CS_TTGO. We used to call siointr1() 229951078Speter * unconditionally, but that defeated the careful discarding of 230051078Speter * stale input in sioopen(). 230151078Speter */ 230251078Speter if (com->state >= (CS_BUSY | CS_TTGO)) 230351078Speter siointr1(com); 230451078Speter 230551078Speter enable_intr(); 230651078Speter splx(s); 230751078Speter comstart(tp); 230851078Speter if (com->ibufold != NULL) { 230951078Speter free(com->ibufold, M_DEVBUF); 231051078Speter com->ibufold = NULL; 231151078Speter } 231251078Speter return (0); 231351078Speter} 231451078Speter 231551078Speterstatic int 231651078Spetersiosetwater(com, speed) 231751078Speter struct com_s *com; 231851078Speter speed_t speed; 231951078Speter{ 232051078Speter int cp4ticks; 232151078Speter u_char *ibuf; 232251078Speter int ibufsize; 232351078Speter struct tty *tp; 232451078Speter 232551078Speter /* 232651078Speter * Make the buffer size large enough to handle a softtty interrupt 232751078Speter * latency of about 2 ticks without loss of throughput or data 232851078Speter * (about 3 ticks if input flow control is not used or not honoured, 232951078Speter * but a bit less for CS5-CS7 modes). 233051078Speter */ 233151078Speter cp4ticks = speed / 10 / hz * 4; 233251078Speter for (ibufsize = 128; ibufsize < cp4ticks;) 233351078Speter ibufsize <<= 1; 233451078Speter if (ibufsize == com->ibufsize) { 233551078Speter disable_intr(); 233651078Speter return (0); 233751078Speter } 233851078Speter 233951078Speter /* 234051078Speter * Allocate input buffer. The extra factor of 2 in the size is 234151078Speter * to allow for an error byte for each input byte. 234251078Speter */ 234351078Speter ibuf = malloc(2 * ibufsize, M_DEVBUF, M_NOWAIT); 234451078Speter if (ibuf == NULL) { 234551078Speter disable_intr(); 234651078Speter return (ENOMEM); 234751078Speter } 234851078Speter 234951078Speter /* Initialize non-critical variables. */ 235051078Speter com->ibufold = com->ibuf; 235151078Speter com->ibufsize = ibufsize; 235251078Speter tp = com->tp; 235351078Speter if (tp != NULL) { 235451078Speter tp->t_ififosize = 2 * ibufsize; 235551078Speter tp->t_ispeedwat = (speed_t)-1; 235651078Speter tp->t_ospeedwat = (speed_t)-1; 235751078Speter } 235851078Speter 235951078Speter /* 236051078Speter * Read current input buffer, if any. Continue with interrupts 236151078Speter * disabled. 236251078Speter */ 236351078Speter disable_intr(); 236451078Speter if (com->iptr != com->ibuf) 236551078Speter sioinput(com); 236651078Speter 236751078Speter /*- 236851078Speter * Initialize critical variables, including input buffer watermarks. 236951078Speter * The external device is asked to stop sending when the buffer 237051078Speter * exactly reaches high water, or when the high level requests it. 237151078Speter * The high level is notified immediately (rather than at a later 237251078Speter * clock tick) when this watermark is reached. 237351078Speter * The buffer size is chosen so the watermark should almost never 237451078Speter * be reached. 237551078Speter * The low watermark is invisibly 0 since the buffer is always 237651078Speter * emptied all at once. 237751078Speter */ 237851078Speter com->iptr = com->ibuf = ibuf; 237951078Speter com->ibufend = ibuf + ibufsize; 238051078Speter com->ierroff = ibufsize; 238151078Speter com->ihighwater = ibuf + 3 * ibufsize / 4; 238251078Speter return (0); 238351078Speter} 238451078Speter 238551078Speterstatic void 238651078Spetercomstart(tp) 238751078Speter struct tty *tp; 238851078Speter{ 238951078Speter struct com_s *com; 239051078Speter int s; 239151078Speter int unit; 239251078Speter 239351078Speter unit = DEV_TO_UNIT(tp->t_dev); 239451078Speter com = com_addr(unit); 239551078Speter s = spltty(); 239651078Speter disable_intr(); 239751078Speter if (tp->t_state & TS_TTSTOP) 239851078Speter com->state &= ~CS_TTGO; 239951078Speter else 240051078Speter com->state |= CS_TTGO; 240151078Speter if (tp->t_state & TS_TBLOCK) { 240251078Speter if (com->mcr_image & MCR_RTS && com->state & CS_RTS_IFLOW) 240351078Speter outb(com->modem_ctl_port, com->mcr_image &= ~MCR_RTS); 240451078Speter } else { 240551078Speter if (!(com->mcr_image & MCR_RTS) && com->iptr < com->ihighwater 240651078Speter && com->state & CS_RTS_IFLOW) 240751078Speter outb(com->modem_ctl_port, com->mcr_image |= MCR_RTS); 240851078Speter } 240951078Speter enable_intr(); 241051078Speter if (tp->t_state & (TS_TIMEOUT | TS_TTSTOP)) { 241151078Speter ttwwakeup(tp); 241251078Speter splx(s); 241351078Speter return; 241451078Speter } 241551078Speter if (tp->t_outq.c_cc != 0) { 241651078Speter struct lbq *qp; 241751078Speter struct lbq *next; 241851078Speter 241951078Speter if (!com->obufs[0].l_queued) { 242051078Speter com->obufs[0].l_tail 242151078Speter = com->obuf1 + q_to_b(&tp->t_outq, com->obuf1, 242251078Speter sizeof com->obuf1); 242351078Speter com->obufs[0].l_next = NULL; 242451078Speter com->obufs[0].l_queued = TRUE; 242551078Speter disable_intr(); 242651078Speter if (com->state & CS_BUSY) { 242751078Speter qp = com->obufq.l_next; 242851078Speter while ((next = qp->l_next) != NULL) 242951078Speter qp = next; 243051078Speter qp->l_next = &com->obufs[0]; 243151078Speter } else { 243251078Speter com->obufq.l_head = com->obufs[0].l_head; 243351078Speter com->obufq.l_tail = com->obufs[0].l_tail; 243451078Speter com->obufq.l_next = &com->obufs[0]; 243551078Speter com->state |= CS_BUSY; 243651078Speter } 243751078Speter enable_intr(); 243851078Speter } 243951078Speter if (tp->t_outq.c_cc != 0 && !com->obufs[1].l_queued) { 244051078Speter com->obufs[1].l_tail 244151078Speter = com->obuf2 + q_to_b(&tp->t_outq, com->obuf2, 244251078Speter sizeof com->obuf2); 244351078Speter com->obufs[1].l_next = NULL; 244451078Speter com->obufs[1].l_queued = TRUE; 244551078Speter disable_intr(); 244651078Speter if (com->state & CS_BUSY) { 244751078Speter qp = com->obufq.l_next; 244851078Speter while ((next = qp->l_next) != NULL) 244951078Speter qp = next; 245051078Speter qp->l_next = &com->obufs[1]; 245151078Speter } else { 245251078Speter com->obufq.l_head = com->obufs[1].l_head; 245351078Speter com->obufq.l_tail = com->obufs[1].l_tail; 245451078Speter com->obufq.l_next = &com->obufs[1]; 245551078Speter com->state |= CS_BUSY; 245651078Speter } 245751078Speter enable_intr(); 245851078Speter } 245951078Speter tp->t_state |= TS_BUSY; 246051078Speter } 246151078Speter disable_intr(); 246251078Speter if (com->state >= (CS_BUSY | CS_TTGO)) 246351078Speter siointr1(com); /* fake interrupt to start output */ 246451078Speter enable_intr(); 246551078Speter ttwwakeup(tp); 246651078Speter splx(s); 246751078Speter} 246851078Speter 246951078Speterstatic void 247051654Sphkcomstop(tp, rw) 247151078Speter struct tty *tp; 247251078Speter int rw; 247351078Speter{ 247451078Speter struct com_s *com; 247551078Speter 247651078Speter com = com_addr(DEV_TO_UNIT(tp->t_dev)); 247751078Speter if (com->gone) 247851078Speter return; 247951078Speter disable_intr(); 248051078Speter if (rw & FWRITE) { 248151078Speter if (com->hasfifo) 248251078Speter#ifdef COM_ESP 248351078Speter /* XXX avoid h/w bug. */ 248451078Speter if (!com->esp) 248551078Speter#endif 248651078Speter outb(com->iobase + com_fifo, 248751078Speter FIFO_XMT_RST | com->fifo_image); 248851078Speter com->obufs[0].l_queued = FALSE; 248951078Speter com->obufs[1].l_queued = FALSE; 249051078Speter if (com->state & CS_ODONE) 249151078Speter com_events -= LOTS_OF_EVENTS; 249251078Speter com->state &= ~(CS_ODONE | CS_BUSY); 249351078Speter com->tp->t_state &= ~TS_BUSY; 249451078Speter } 249551078Speter if (rw & FREAD) { 249651078Speter if (com->hasfifo) 249751078Speter#ifdef COM_ESP 249851078Speter /* XXX avoid h/w bug. */ 249951078Speter if (!com->esp) 250051078Speter#endif 250151078Speter outb(com->iobase + com_fifo, 250251078Speter FIFO_RCV_RST | com->fifo_image); 250351078Speter com_events -= (com->iptr - com->ibuf); 250451078Speter com->iptr = com->ibuf; 250551078Speter } 250651078Speter enable_intr(); 250751078Speter comstart(tp); 250851078Speter} 250951078Speter 251051078Speterstatic int 251151078Spetercommctl(com, bits, how) 251251078Speter struct com_s *com; 251351078Speter int bits; 251451078Speter int how; 251551078Speter{ 251651078Speter int mcr; 251751078Speter int msr; 251851078Speter 251951078Speter if (how == DMGET) { 252051078Speter bits = TIOCM_LE; /* XXX - always enabled while open */ 252151078Speter mcr = com->mcr_image; 252251078Speter if (mcr & MCR_DTR) 252351078Speter bits |= TIOCM_DTR; 252451078Speter if (mcr & MCR_RTS) 252551078Speter bits |= TIOCM_RTS; 252651078Speter msr = com->prev_modem_status; 252751078Speter if (msr & MSR_CTS) 252851078Speter bits |= TIOCM_CTS; 252951078Speter if (msr & MSR_DCD) 253051078Speter bits |= TIOCM_CD; 253151078Speter if (msr & MSR_DSR) 253251078Speter bits |= TIOCM_DSR; 253351078Speter /* 253451078Speter * XXX - MSR_RI is naturally volatile, and we make MSR_TERI 253551078Speter * more volatile by reading the modem status a lot. Perhaps 253651078Speter * we should latch both bits until the status is read here. 253751078Speter */ 253851078Speter if (msr & (MSR_RI | MSR_TERI)) 253951078Speter bits |= TIOCM_RI; 254051078Speter return (bits); 254151078Speter } 254251078Speter mcr = 0; 254351078Speter if (bits & TIOCM_DTR) 254451078Speter mcr |= MCR_DTR; 254551078Speter if (bits & TIOCM_RTS) 254651078Speter mcr |= MCR_RTS; 254751078Speter if (com->gone) 254851078Speter return(0); 254951078Speter disable_intr(); 255051078Speter switch (how) { 255151078Speter case DMSET: 255251078Speter outb(com->modem_ctl_port, 255351078Speter com->mcr_image = mcr | (com->mcr_image & MCR_IENABLE)); 255451078Speter break; 255551078Speter case DMBIS: 255651078Speter outb(com->modem_ctl_port, com->mcr_image |= mcr); 255751078Speter break; 255851078Speter case DMBIC: 255951078Speter outb(com->modem_ctl_port, com->mcr_image &= ~mcr); 256051078Speter break; 256151078Speter } 256251078Speter enable_intr(); 256351078Speter return (0); 256451078Speter} 256551078Speter 256651078Speterstatic void 256751078Spetersiosettimeout() 256851078Speter{ 256951078Speter struct com_s *com; 257051078Speter bool_t someopen; 257151078Speter int unit; 257251078Speter 257351078Speter /* 257451078Speter * Set our timeout period to 1 second if no polled devices are open. 257551078Speter * Otherwise set it to max(1/200, 1/hz). 257651078Speter * Enable timeouts iff some device is open. 257751078Speter */ 257851078Speter untimeout(comwakeup, (void *)NULL, sio_timeout_handle); 257951078Speter sio_timeout = hz; 258051078Speter someopen = FALSE; 258153344Speter for (unit = 0; unit < sio_numunits; ++unit) { 258251078Speter com = com_addr(unit); 258351078Speter if (com != NULL && com->tp != NULL 258451078Speter && com->tp->t_state & TS_ISOPEN && !com->gone) { 258551078Speter someopen = TRUE; 258651078Speter if (com->poll || com->poll_output) { 258751078Speter sio_timeout = hz > 200 ? hz / 200 : 1; 258851078Speter break; 258951078Speter } 259051078Speter } 259151078Speter } 259251078Speter if (someopen) { 259351078Speter sio_timeouts_until_log = hz / sio_timeout; 259451078Speter sio_timeout_handle = timeout(comwakeup, (void *)NULL, 259551078Speter sio_timeout); 259651078Speter } else { 259751078Speter /* Flush error messages, if any. */ 259851078Speter sio_timeouts_until_log = 1; 259951078Speter comwakeup((void *)NULL); 260051078Speter untimeout(comwakeup, (void *)NULL, sio_timeout_handle); 260151078Speter } 260251078Speter} 260351078Speter 260451078Speterstatic void 260551078Spetercomwakeup(chan) 260651078Speter void *chan; 260751078Speter{ 260851078Speter struct com_s *com; 260951078Speter int unit; 261051078Speter 261151078Speter sio_timeout_handle = timeout(comwakeup, (void *)NULL, sio_timeout); 261251078Speter 261351078Speter /* 261451078Speter * Recover from lost output interrupts. 261551078Speter * Poll any lines that don't use interrupts. 261651078Speter */ 261753344Speter for (unit = 0; unit < sio_numunits; ++unit) { 261851078Speter com = com_addr(unit); 261951078Speter if (com != NULL && !com->gone 262051078Speter && (com->state >= (CS_BUSY | CS_TTGO) || com->poll)) { 262151078Speter disable_intr(); 262251078Speter siointr1(com); 262351078Speter enable_intr(); 262451078Speter } 262551078Speter } 262651078Speter 262751078Speter /* 262851078Speter * Check for and log errors, but not too often. 262951078Speter */ 263051078Speter if (--sio_timeouts_until_log > 0) 263151078Speter return; 263251078Speter sio_timeouts_until_log = hz / sio_timeout; 263353344Speter for (unit = 0; unit < sio_numunits; ++unit) { 263451078Speter int errnum; 263551078Speter 263651078Speter com = com_addr(unit); 263751078Speter if (com == NULL) 263851078Speter continue; 263951078Speter if (com->gone) 264051078Speter continue; 264151078Speter for (errnum = 0; errnum < CE_NTYPES; ++errnum) { 264251078Speter u_int delta; 264351078Speter u_long total; 264451078Speter 264551078Speter disable_intr(); 264651078Speter delta = com->delta_error_counts[errnum]; 264751078Speter com->delta_error_counts[errnum] = 0; 264851078Speter enable_intr(); 264951078Speter if (delta == 0) 265051078Speter continue; 265151078Speter total = com->error_counts[errnum] += delta; 265251078Speter log(LOG_ERR, "sio%d: %u more %s%s (total %lu)\n", 265351078Speter unit, delta, error_desc[errnum], 265451078Speter delta == 1 ? "" : "s", total); 265551078Speter } 265651078Speter } 265751078Speter} 265851078Speter 265951078Speterstatic void 266051078Speterdisc_optim(tp, t, com) 266151078Speter struct tty *tp; 266251078Speter struct termios *t; 266351078Speter struct com_s *com; 266451078Speter{ 266551078Speter if (!(t->c_iflag & (ICRNL | IGNCR | IMAXBEL | INLCR | ISTRIP | IXON)) 266651078Speter && (!(t->c_iflag & BRKINT) || (t->c_iflag & IGNBRK)) 266751078Speter && (!(t->c_iflag & PARMRK) 266851078Speter || (t->c_iflag & (IGNPAR | IGNBRK)) == (IGNPAR | IGNBRK)) 266951078Speter && !(t->c_lflag & (ECHO | ICANON | IEXTEN | ISIG | PENDIN)) 267051078Speter && linesw[tp->t_line].l_rint == ttyinput) 267151078Speter tp->t_state |= TS_CAN_BYPASS_L_RINT; 267251078Speter else 267351078Speter tp->t_state &= ~TS_CAN_BYPASS_L_RINT; 267451078Speter com->hotchar = linesw[tp->t_line].l_hotchar; 267551078Speter} 267651078Speter 267751078Speter/* 267851078Speter * Following are all routines needed for SIO to act as console 267951078Speter */ 268051078Speter#include <sys/cons.h> 268151078Speter 268251078Speterstruct siocnstate { 268351078Speter u_char dlbl; 268451078Speter u_char dlbh; 268551078Speter u_char ier; 268651078Speter u_char cfcr; 268751078Speter u_char mcr; 268851078Speter}; 268951078Speter 269051078Speterstatic speed_t siocngetspeed __P((Port_t, struct speedtab *)); 269151078Speterstatic void siocnclose __P((struct siocnstate *sp, Port_t iobase)); 269251078Speterstatic void siocnopen __P((struct siocnstate *sp, Port_t iobase, int speed)); 269351078Speterstatic void siocntxwait __P((Port_t iobase)); 269451078Speter 269551078Speterstatic cn_probe_t siocnprobe; 269651078Speterstatic cn_init_t siocninit; 269751078Speterstatic cn_checkc_t siocncheckc; 269851078Speterstatic cn_getc_t siocngetc; 269951078Speterstatic cn_putc_t siocnputc; 270051078Speter 270151078Speter#ifdef __i386__ 270255823SyokotaCONS_DRIVER(sio, siocnprobe, siocninit, NULL, siocngetc, siocncheckc, 270355823Syokota siocnputc, NULL); 270451078Speter#endif 270551078Speter 270651078Speter/* To get the GDB related variables */ 270751078Speter#if DDB > 0 270851078Speter#include <ddb/ddb.h> 270951078Speter#endif 271051078Speter 271151078Speterstatic void 271251078Spetersiocntxwait(iobase) 271351078Speter Port_t iobase; 271451078Speter{ 271551078Speter int timo; 271651078Speter 271751078Speter /* 271851078Speter * Wait for any pending transmission to finish. Required to avoid 271951078Speter * the UART lockup bug when the speed is changed, and for normal 272051078Speter * transmits. 272151078Speter */ 272251078Speter timo = 100000; 272351078Speter while ((inb(iobase + com_lsr) & (LSR_TSRE | LSR_TXRDY)) 272451078Speter != (LSR_TSRE | LSR_TXRDY) && --timo != 0) 272551078Speter ; 272651078Speter} 272751078Speter 272851078Speter/* 272951078Speter * Read the serial port specified and try to figure out what speed 273051078Speter * it's currently running at. We're assuming the serial port has 273151078Speter * been initialized and is basicly idle. This routine is only intended 273251078Speter * to be run at system startup. 273351078Speter * 273451078Speter * If the value read from the serial port doesn't make sense, return 0. 273551078Speter */ 273651078Speter 273751078Speterstatic speed_t 273851078Spetersiocngetspeed(iobase, table) 273951078Speter Port_t iobase; 274051078Speter struct speedtab *table; 274151078Speter{ 274251078Speter int code; 274351078Speter u_char dlbh; 274451078Speter u_char dlbl; 274551078Speter u_char cfcr; 274651078Speter 274751078Speter cfcr = inb(iobase + com_cfcr); 274851078Speter outb(iobase + com_cfcr, CFCR_DLAB | cfcr); 274951078Speter 275051078Speter dlbl = inb(iobase + com_dlbl); 275151078Speter dlbh = inb(iobase + com_dlbh); 275251078Speter 275351078Speter outb(iobase + com_cfcr, cfcr); 275451078Speter 275551078Speter code = dlbh << 8 | dlbl; 275651078Speter 275753344Speter for (; table->sp_speed != -1; table++) 275851078Speter if (table->sp_code == code) 275951078Speter return (table->sp_speed); 276051078Speter 276151078Speter return 0; /* didn't match anything sane */ 276251078Speter} 276351078Speter 276451078Speterstatic void 276551078Spetersiocnopen(sp, iobase, speed) 276651078Speter struct siocnstate *sp; 276751078Speter Port_t iobase; 276851078Speter int speed; 276951078Speter{ 277051078Speter int divisor; 277151078Speter u_char dlbh; 277251078Speter u_char dlbl; 277351078Speter 277451078Speter /* 277551078Speter * Save all the device control registers except the fifo register 277651078Speter * and set our default ones (cs8 -parenb speed=comdefaultrate). 277751078Speter * We can't save the fifo register since it is read-only. 277851078Speter */ 277951078Speter sp->ier = inb(iobase + com_ier); 278051078Speter outb(iobase + com_ier, 0); /* spltty() doesn't stop siointr() */ 278151078Speter siocntxwait(iobase); 278251078Speter sp->cfcr = inb(iobase + com_cfcr); 278351078Speter outb(iobase + com_cfcr, CFCR_DLAB | CFCR_8BITS); 278451078Speter sp->dlbl = inb(iobase + com_dlbl); 278551078Speter sp->dlbh = inb(iobase + com_dlbh); 278651078Speter /* 278751078Speter * Only set the divisor registers if they would change, since on 278851078Speter * some 16550 incompatibles (Startech), setting them clears the 278951078Speter * data input register. This also reduces the effects of the 279051078Speter * UMC8669F bug. 279151078Speter */ 279251078Speter divisor = ttspeedtab(speed, comspeedtab); 279351078Speter dlbl = divisor & 0xFF; 279451078Speter if (sp->dlbl != dlbl) 279551078Speter outb(iobase + com_dlbl, dlbl); 279651078Speter dlbh = (u_int) divisor >> 8; 279751078Speter if (sp->dlbh != dlbh) 279851078Speter outb(iobase + com_dlbh, dlbh); 279951078Speter outb(iobase + com_cfcr, CFCR_8BITS); 280051078Speter sp->mcr = inb(iobase + com_mcr); 280151078Speter /* 280251078Speter * We don't want interrupts, but must be careful not to "disable" 280351078Speter * them by clearing the MCR_IENABLE bit, since that might cause 280451078Speter * an interrupt by floating the IRQ line. 280551078Speter */ 280651078Speter outb(iobase + com_mcr, (sp->mcr & MCR_IENABLE) | MCR_DTR | MCR_RTS); 280751078Speter} 280851078Speter 280951078Speterstatic void 281051078Spetersiocnclose(sp, iobase) 281151078Speter struct siocnstate *sp; 281251078Speter Port_t iobase; 281351078Speter{ 281451078Speter /* 281551078Speter * Restore the device control registers. 281651078Speter */ 281751078Speter siocntxwait(iobase); 281851078Speter outb(iobase + com_cfcr, CFCR_DLAB | CFCR_8BITS); 281951078Speter if (sp->dlbl != inb(iobase + com_dlbl)) 282051078Speter outb(iobase + com_dlbl, sp->dlbl); 282151078Speter if (sp->dlbh != inb(iobase + com_dlbh)) 282251078Speter outb(iobase + com_dlbh, sp->dlbh); 282351078Speter outb(iobase + com_cfcr, sp->cfcr); 282451078Speter /* 282551078Speter * XXX damp oscillations of MCR_DTR and MCR_RTS by not restoring them. 282651078Speter */ 282751078Speter outb(iobase + com_mcr, sp->mcr | MCR_DTR | MCR_RTS); 282851078Speter outb(iobase + com_ier, sp->ier); 282951078Speter} 283051078Speter 283151078Speterstatic void 283251078Spetersiocnprobe(cp) 283351078Speter struct consdev *cp; 283451078Speter{ 283551078Speter speed_t boot_speed; 283651078Speter u_char cfcr; 283751078Speter int s, unit; 283851078Speter struct siocnstate sp; 283951078Speter 284051078Speter /* 284151078Speter * Find our first enabled console, if any. If it is a high-level 284251078Speter * console device, then initialize it and return successfully. 284351078Speter * If it is a low-level console device, then initialize it and 284451078Speter * return unsuccessfully. It must be initialized in both cases 284551078Speter * for early use by console drivers and debuggers. Initializing 284651078Speter * the hardware is not necessary in all cases, since the i/o 284751078Speter * routines initialize it on the fly, but it is necessary if 284851078Speter * input might arrive while the hardware is switched back to an 284951078Speter * uninitialized state. We can't handle multiple console devices 285051078Speter * yet because our low-level routines don't take a device arg. 285151078Speter * We trust the user to set the console flags properly so that we 285251078Speter * don't need to probe. 285351078Speter */ 285451078Speter cp->cn_pri = CN_DEAD; 285551078Speter 285651078Speter for (unit = 0; unit < 16; unit++) { /* XXX need to know how many */ 285751078Speter int flags; 285851078Speter int disabled; 285951078Speter if (resource_int_value("sio", unit, "disabled", &disabled) == 0) { 286051078Speter if (disabled) 286151078Speter continue; 286251078Speter } 286351078Speter if (resource_int_value("sio", unit, "flags", &flags)) 286451078Speter continue; 286551078Speter if (COM_CONSOLE(flags) || COM_DEBUGGER(flags)) { 286651078Speter int port; 286751078Speter Port_t iobase; 286851078Speter 286951078Speter if (resource_int_value("sio", unit, "port", &port)) 287051078Speter continue; 287151078Speter iobase = port; 287251078Speter s = spltty(); 287351078Speter if (boothowto & RB_SERIAL) { 287451078Speter boot_speed = siocngetspeed(iobase, comspeedtab); 287551078Speter if (boot_speed) 287651078Speter comdefaultrate = boot_speed; 287751078Speter } 287851078Speter 287951078Speter /* 288051078Speter * Initialize the divisor latch. We can't rely on 288151078Speter * siocnopen() to do this the first time, since it 288251078Speter * avoids writing to the latch if the latch appears 288351078Speter * to have the correct value. Also, if we didn't 288451078Speter * just read the speed from the hardware, then we 288551078Speter * need to set the speed in hardware so that 288651078Speter * switching it later is null. 288751078Speter */ 288851078Speter cfcr = inb(iobase + com_cfcr); 288951078Speter outb(iobase + com_cfcr, CFCR_DLAB | cfcr); 289051078Speter outb(iobase + com_dlbl, 289151078Speter COMBRD(comdefaultrate) & 0xff); 289251078Speter outb(iobase + com_dlbh, 289351078Speter (u_int) COMBRD(comdefaultrate) >> 8); 289451078Speter outb(iobase + com_cfcr, cfcr); 289551078Speter 289651078Speter siocnopen(&sp, iobase, comdefaultrate); 289751078Speter 289851078Speter splx(s); 289951078Speter if (COM_CONSOLE(flags) && !COM_LLCONSOLE(flags)) { 290051078Speter cp->cn_dev = makedev(CDEV_MAJOR, unit); 290151078Speter cp->cn_pri = COM_FORCECONSOLE(flags) 290251078Speter || boothowto & RB_SERIAL 290351078Speter ? CN_REMOTE : CN_NORMAL; 290451078Speter siocniobase = iobase; 290551078Speter siocnunit = unit; 290651078Speter } 290751078Speter if (COM_DEBUGGER(flags)) { 290851078Speter printf("sio%d: gdb debugging port\n", unit); 290951078Speter siogdbiobase = iobase; 291051078Speter siogdbunit = unit; 291151078Speter#if DDB > 0 291251078Speter gdbdev = makedev(CDEV_MAJOR, unit); 291351078Speter gdb_getc = siocngetc; 291451078Speter gdb_putc = siocnputc; 291551078Speter#endif 291651078Speter } 291751078Speter } 291851078Speter } 291951078Speter#ifdef __i386__ 292051078Speter#if DDB > 0 292151078Speter /* 292251078Speter * XXX Ugly Compatability. 292351078Speter * If no gdb port has been specified, set it to be the console 292451078Speter * as some configuration files don't specify the gdb port. 292551078Speter */ 292651078Speter if (gdbdev == NODEV && (boothowto & RB_GDB)) { 292751078Speter printf("Warning: no GDB port specified. Defaulting to sio%d.\n", 292851078Speter siocnunit); 292951078Speter printf("Set flag 0x80 on desired GDB port in your\n"); 293051078Speter printf("configuration file (currently sio only).\n"); 293151078Speter siogdbiobase = siocniobase; 293251078Speter siogdbunit = siocnunit; 293351078Speter gdbdev = makedev(CDEV_MAJOR, siocnunit); 293451078Speter gdb_getc = siocngetc; 293551078Speter gdb_putc = siocnputc; 293651078Speter } 293751078Speter#endif 293851078Speter#endif 293951078Speter} 294051078Speter 294151078Speter#ifdef __alpha__ 294251078Speter 294355868SgallatinCONS_DRIVER(sio, NULL, NULL, NULL, siocngetc, siocncheckc, siocnputc, NULL); 294451078Speter 294551078Speterint 294651078Spetersiocnattach(port, speed) 294751078Speter int port; 294851078Speter int speed; 294951078Speter{ 295051078Speter int s; 295151078Speter u_char cfcr; 295251078Speter struct siocnstate sp; 295351078Speter 295451078Speter siocniobase = port; 295551078Speter comdefaultrate = speed; 295651078Speter sio_consdev.cn_pri = CN_NORMAL; 295751078Speter sio_consdev.cn_dev = makedev(CDEV_MAJOR, 0); 295851078Speter 295951078Speter s = spltty(); 296051078Speter 296151078Speter /* 296251078Speter * Initialize the divisor latch. We can't rely on 296351078Speter * siocnopen() to do this the first time, since it 296451078Speter * avoids writing to the latch if the latch appears 296551078Speter * to have the correct value. Also, if we didn't 296651078Speter * just read the speed from the hardware, then we 296751078Speter * need to set the speed in hardware so that 296851078Speter * switching it later is null. 296951078Speter */ 297051078Speter cfcr = inb(siocniobase + com_cfcr); 297151078Speter outb(siocniobase + com_cfcr, CFCR_DLAB | cfcr); 297251078Speter outb(siocniobase + com_dlbl, 297351078Speter COMBRD(comdefaultrate) & 0xff); 297451078Speter outb(siocniobase + com_dlbh, 297551078Speter (u_int) COMBRD(comdefaultrate) >> 8); 297651078Speter outb(siocniobase + com_cfcr, cfcr); 297751078Speter 297851078Speter siocnopen(&sp, siocniobase, comdefaultrate); 297951078Speter splx(s); 298051078Speter 298151078Speter cn_tab = &sio_consdev; 298251078Speter return 0; 298351078Speter} 298451078Speter 298551078Speterint 298651078Spetersiogdbattach(port, speed) 298751078Speter int port; 298851078Speter int speed; 298951078Speter{ 299051078Speter int s; 299151078Speter u_char cfcr; 299251078Speter struct siocnstate sp; 299351078Speter 299451078Speter siogdbiobase = port; 299551078Speter gdbdefaultrate = speed; 299651078Speter 299751078Speter s = spltty(); 299851078Speter 299951078Speter /* 300051078Speter * Initialize the divisor latch. We can't rely on 300151078Speter * siocnopen() to do this the first time, since it 300251078Speter * avoids writing to the latch if the latch appears 300351078Speter * to have the correct value. Also, if we didn't 300451078Speter * just read the speed from the hardware, then we 300551078Speter * need to set the speed in hardware so that 300651078Speter * switching it later is null. 300751078Speter */ 300851078Speter cfcr = inb(siogdbiobase + com_cfcr); 300951078Speter outb(siogdbiobase + com_cfcr, CFCR_DLAB | cfcr); 301051078Speter outb(siogdbiobase + com_dlbl, 301151078Speter COMBRD(gdbdefaultrate) & 0xff); 301251078Speter outb(siogdbiobase + com_dlbh, 301351078Speter (u_int) COMBRD(gdbdefaultrate) >> 8); 301451078Speter outb(siogdbiobase + com_cfcr, cfcr); 301551078Speter 301651078Speter siocnopen(&sp, siogdbiobase, gdbdefaultrate); 301751078Speter splx(s); 301851078Speter 301951078Speter return 0; 302051078Speter} 302151078Speter 302251078Speter#endif 302351078Speter 302451078Speterstatic void 302551078Spetersiocninit(cp) 302651078Speter struct consdev *cp; 302751078Speter{ 302851078Speter comconsole = DEV_TO_UNIT(cp->cn_dev); 302951078Speter} 303051078Speter 303151078Speterstatic int 303251078Spetersiocncheckc(dev) 303351078Speter dev_t dev; 303451078Speter{ 303551078Speter int c; 303651078Speter Port_t iobase; 303751078Speter int s; 303851078Speter struct siocnstate sp; 303951078Speter 304051078Speter if (minor(dev) == siogdbunit) 304151078Speter iobase = siogdbiobase; 304251078Speter else 304351078Speter iobase = siocniobase; 304451078Speter s = spltty(); 304551078Speter siocnopen(&sp, iobase, comdefaultrate); 304651078Speter if (inb(iobase + com_lsr) & LSR_RXRDY) 304751078Speter c = inb(iobase + com_data); 304851078Speter else 304951078Speter c = -1; 305051078Speter siocnclose(&sp, iobase); 305151078Speter splx(s); 305251078Speter return (c); 305351078Speter} 305451078Speter 305551078Speter 305651078Speterint 305751078Spetersiocngetc(dev) 305851078Speter dev_t dev; 305951078Speter{ 306051078Speter int c; 306151078Speter Port_t iobase; 306251078Speter int s; 306351078Speter struct siocnstate sp; 306451078Speter 306551078Speter if (minor(dev) == siogdbunit) 306651078Speter iobase = siogdbiobase; 306751078Speter else 306851078Speter iobase = siocniobase; 306951078Speter s = spltty(); 307051078Speter siocnopen(&sp, iobase, comdefaultrate); 307151078Speter while (!(inb(iobase + com_lsr) & LSR_RXRDY)) 307251078Speter ; 307351078Speter c = inb(iobase + com_data); 307451078Speter siocnclose(&sp, iobase); 307551078Speter splx(s); 307651078Speter return (c); 307751078Speter} 307851078Speter 307951078Spetervoid 308051078Spetersiocnputc(dev, c) 308151078Speter dev_t dev; 308251078Speter int c; 308351078Speter{ 308451078Speter int s; 308551078Speter struct siocnstate sp; 308651078Speter Port_t iobase; 308751078Speter 308851078Speter if (minor(dev) == siogdbunit) 308951078Speter iobase = siogdbiobase; 309051078Speter else 309151078Speter iobase = siocniobase; 309251078Speter s = spltty(); 309351078Speter siocnopen(&sp, iobase, comdefaultrate); 309451078Speter siocntxwait(iobase); 309551078Speter outb(iobase + com_data, c); 309651078Speter siocnclose(&sp, iobase); 309751078Speter splx(s); 309851078Speter} 309951078Speter 310051078Speter#ifdef __alpha__ 310151078Speterint 310251078Spetersiogdbgetc() 310351078Speter{ 310451078Speter int c; 310551078Speter Port_t iobase; 310651078Speter int s; 310751078Speter struct siocnstate sp; 310851078Speter 310951078Speter iobase = siogdbiobase; 311051078Speter s = spltty(); 311151078Speter siocnopen(&sp, iobase, gdbdefaultrate); 311251078Speter while (!(inb(iobase + com_lsr) & LSR_RXRDY)) 311351078Speter ; 311451078Speter c = inb(iobase + com_data); 311551078Speter siocnclose(&sp, iobase); 311651078Speter splx(s); 311751078Speter return (c); 311851078Speter} 311951078Speter 312051078Spetervoid 312151078Spetersiogdbputc(c) 312251078Speter int c; 312351078Speter{ 312451078Speter int s; 312551078Speter struct siocnstate sp; 312651078Speter 312751078Speter s = spltty(); 312851078Speter siocnopen(&sp, siogdbiobase, gdbdefaultrate); 312951078Speter siocntxwait(siogdbiobase); 313051078Speter outb(siogdbiobase + com_data, c); 313151078Speter siocnclose(&sp, siogdbiobase); 313251078Speter splx(s); 313351078Speter} 313451078Speter#endif 313551078Speter 313652471SimpDRIVER_MODULE(sio, isa, sio_isa_driver, sio_devclass, 0, 0); 313752471Simp#if NCARD > 0 313852471SimpDRIVER_MODULE(sio, pccard, sio_pccard_driver, sio_devclass, 0, 0); 313952471Simp#endif 3140