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1ab305ef60
freebsd/sys/dev/dgb/dgm.c
Poul-Henning Kamp 1ab305ef60 Introduce ttyread() and ttywrite() which do the canonical thing. 
Use them in many tty drivers.

Reviewed by: julian, bde
1999-09-28 11:45:31 +00:00

2008 lines
45 KiB
C
Raw Blame History

/*-
* $FreeBSD$
*
* This driver and the associated header files support the ISA PC/Xem
* Digiboards. Its evolutionary roots are described below.
* Jack O'Neill <jack@diamond.xtalwind.net>
*
* Digiboard driver.
*
* Stage 1. "Better than nothing".
* Stage 2. "Gee, it works!".
*
* Based on sio driver by Bruce Evans and on Linux driver by Troy
* De Jongh <troyd@digibd.com> or <troyd@skypoint.com>
* which is under GNU General Public License version 2 so this driver
* is forced to be under GPL 2 too.
*
* Written by Serge Babkin,
* Joint Stock Commercial Bank "Chelindbank"
* (Chelyabinsk, Russia)
* babkin@hq.icb.chel.su
*
* Assorted hacks to make it more functional and working under 3.0-current.
* Fixed broken routines to prevent processes hanging on closed (thanks
* to Bruce for his patience and assistance). Thanks also to Maxim Bolotin
* <max@run.net> for his patches which did most of the work to get this
* running under 2.2/3.0-current.
* Implemented ioctls: TIOCMSDTRWAIT, TIOCMGDTRWAIT, TIOCTIMESTAMP &
* TIOCDCDTIMESTAMP.
* Sysctl debug flag is now a bitflag, to filter noise during debugging.
* David L. Nugent <davidn@blaze.net.au>
*/
#include "opt_compat.h"
#include "dgm.h"
#if NDGM > 0
/* Helg: i.e.25 times per sec board will be polled */
#define POLLSPERSEC 25
/* How many charactes can we write to input tty rawq */
#define DGB_IBUFSIZE (TTYHOG-100)
/* the overall number of ports controlled by this driver */
#ifndef NDGMPORTS
# define NDGMPORTS (NDGM*64)
#endif
#include <sys/param.h>
#include <sys/systm.h>
#include <sys/tty.h>
#include <sys/proc.h>
#include <sys/conf.h>
#include <sys/dkstat.h>
#include <sys/fcntl.h>
#include <sys/kernel.h>
#include <sys/sysctl.h>
#include <machine/clock.h>
#include <vm/vm.h>
#include <vm/pmap.h>
#include <i386/isa/isa_device.h>
#include <gnu/i386/isa/dgmfep.h>
#include <gnu/i386/isa/dgmbios.h>
#include <gnu/i386/isa/dgmreg.h>
#define CALLOUT_MASK 0x40000
#define CONTROL_MASK 0xC0
#define CONTROL_INIT_STATE 0x40
#define CONTROL_LOCK_STATE 0x80
#define UNIT_MASK 0x30000
#define PORT_MASK 0x3F
#define DEV_TO_UNIT(dev) (MINOR_TO_UNIT(minor(dev)))
#define MINOR_MAGIC_MASK (CALLOUT_MASK | CONTROL_MASK)
#define MINOR_TO_UNIT(mynor) (((mynor) & UNIT_MASK)>>16)
#define MINOR_TO_PORT(mynor) ((mynor) & PORT_MASK)
/* types. XXX - should be elsewhere */
typedef u_char bool_t; /* boolean */
/* digiboard port structure */
struct dgm_p {
bool_t status;
u_char unit; /* board unit number */
u_char pnum; /* port number */
u_char omodem; /* FEP output modem status */
u_char imodem; /* FEP input modem status */
u_char modemfake; /* Modem values to be forced */
u_char modem; /* Force values */
u_char hflow;
u_char dsr;
u_char dcd;
u_char stopc;
u_char startc;
u_char stopca;
u_char startca;
u_char fepstopc;
u_char fepstartc;
u_char fepstopca;
u_char fepstartca;
u_char txwin;
u_char rxwin;
ushort fepiflag;
ushort fepcflag;
ushort fepoflag;
ushort txbufhead;
ushort txbufsize;
ushort rxbufhead;
ushort rxbufsize;
int close_delay;
int count;
int blocked_open;
int event;
int asyncflags;
u_long statusflags;
u_char *txptr;
u_char *rxptr;
volatile struct board_chan *brdchan;
struct tty *tty;
bool_t active_out; /* nonzero if the callout device is open */
u_int wopeners; /* # processes waiting for DCD in open() */
/* Initial state. */
struct termios it_in; /* should be in struct tty */
struct termios it_out;
/* Lock state. */
struct termios lt_in; /* should be in struct tty */
struct termios lt_out;
bool_t do_timestamp;
bool_t do_dcd_timestamp;
struct timeval timestamp;
struct timeval dcd_timestamp;
/* flags of state, are used in sleep() too */
u_char closing; /* port is being closed now */
u_char draining; /* port is being drained now */
u_char used; /* port is being used now */
u_char mustdrain; /* data must be waited to drain in dgmparam() */
};
/* Digiboard per-board structure */
struct dgm_softc {
/* struct board_info */
u_char status; /* status: DISABLED/ENABLED */
u_char unit; /* unit number */
u_char type; /* type of card: PCXE, PCXI, PCXEVE */
u_char altpin; /* do we need alternate pin setting ? */
int numports; /* number of ports on card */
int port; /* I/O port */
u_char *vmem; /* virtual memory address */
long pmem; /* physical memory address */
int mem_seg; /* internal memory segment */
struct dgm_p *ports; /* pointer to array of port descriptors */
struct tty *ttys; /* pointer to array of TTY structures */
volatile struct global_data *mailbox;
};
static struct dgm_softc dgm_softc[NDGM];
static struct dgm_p dgm_ports[NDGMPORTS];
static struct tty dgm_tty[NDGMPORTS];
int fi(void);
/*
* The public functions in the com module ought to be declared in a com-driver
* system header.
*/
/* Interrupt handling entry points. */
static void dgmpoll __P((void *unit_c));
/* Device switch entry points. */
#define dgmreset noreset
#define dgmmmap nommap
#define dgmstrategy nostrategy
static int dgmattach __P((struct isa_device *dev));
static int dgmprobe __P((struct isa_device *dev));
static void fepcmd(struct dgm_p *port, unsigned cmd, unsigned op1, unsigned op2,
unsigned ncmds, unsigned bytecmd);
static void dgmstart __P((struct tty *tp));
static void dgmstop __P((struct tty *tp, int rw));
static int dgmparam __P((struct tty *tp, struct termios *t));
static void dgmhardclose __P((struct dgm_p *port));
static void dgm_drain_or_flush __P((struct dgm_p *port));
static int dgmdrain __P((struct dgm_p *port));
static void dgm_pause __P((void *chan));
static void wakeflush __P((void *p));
static void disc_optim __P((struct tty *tp, struct termios *t));
struct isa_driver dgmdriver = {
dgmprobe, dgmattach, "dgm",0
};
static d_open_t dgmopen;
static d_close_t dgmclose;
static d_ioctl_t dgmioctl;
#define CDEV_MAJOR 101
static struct cdevsw dgm_cdevsw = {
/* open */ dgmopen,
/* close */ dgmclose,
/* read */ ttyread,
/* write */ ttywrite,
/* ioctl */ dgmioctl,
/* poll */ ttypoll,
/* mmap */ nommap,
/* strategy */ nostrategy,
/* name */ "dgm",
/* maj */ CDEV_MAJOR,
/* dump */ nodump,
/* psize */ nopsize,
/* flags */ D_TTY,
/* bmaj */ -1
};
static speed_t dgmdefaultrate = TTYDEF_SPEED;
static struct speedtab dgmspeedtab[] = {
0, FEP_B0, /* old (sysV-like) Bx codes */
50, FEP_B50,
75, FEP_B75,
110, FEP_B110,
134, FEP_B134,
150, FEP_B150,
200, FEP_B200,
300, FEP_B300,
600, FEP_B600,
1200, FEP_B1200,
1800, FEP_B1800,
2400, FEP_B2400,
4800, FEP_B4800,
9600, FEP_B9600,
19200, FEP_B19200,
38400, FEP_B38400,
57600, (FEP_FASTBAUD|FEP_B50), /* B50 & fast baud table */
115200, (FEP_FASTBAUD|FEP_B110), /* B100 & fast baud table */
-1, -1
};
static struct dbgflagtbl
{
tcflag_t in_mask;
tcflag_t in_val;
tcflag_t out_val;
} dgm_cflags[] =
{
{ PARODD, PARODD, FEP_PARODD },
{ PARENB, PARENB, FEP_PARENB },
{ CSTOPB, CSTOPB, FEP_CSTOPB },
{ CSIZE, CS5, FEP_CS6 },
{ CSIZE, CS6, FEP_CS6 },
{ CSIZE, CS7, FEP_CS7 },
{ CSIZE, CS8, FEP_CS8 },
{ CLOCAL, CLOCAL, FEP_CLOCAL },
{ (tcflag_t)-1 }
}, dgm_iflags[] =
{
{ IGNBRK, IGNBRK, FEP_IGNBRK },
{ BRKINT, BRKINT, FEP_BRKINT },
{ IGNPAR, IGNPAR, FEP_IGNPAR },
{ PARMRK, PARMRK, FEP_PARMRK },
{ INPCK, INPCK, FEP_INPCK },
{ ISTRIP, ISTRIP, FEP_ISTRIP },
{ IXON, IXON, FEP_IXON },
{ IXOFF, IXOFF, FEP_IXOFF },
{ IXANY, IXANY, FEP_IXANY },
{ (tcflag_t)-1 }
}, dgm_flow[] =
{
{ CRTSCTS, CRTSCTS, CTS|RTS },
{ CRTSCTS, CCTS_OFLOW, CTS },
{ CRTSCTS, CRTS_IFLOW, RTS },
{ (tcflag_t)-1 }
};
/* xlat bsd termios flags to dgm sys-v style */
static tcflag_t
dgmflags(struct dbgflagtbl *tbl, tcflag_t input)
{
tcflag_t output = 0;
int i;
for (i=0; tbl[i].in_mask != (tcflag_t)-1; i++)
{
if ((input & tbl[i].in_mask) == tbl[i].in_val)
output |= tbl[i].out_val;
}
return output;
}
static int dgmdebug=0;
SYSCTL_INT(_debug, OID_AUTO, dgm_debug, CTLFLAG_RW, &dgmdebug, 0, "");
static __inline int setwin __P((struct dgm_softc *sc, unsigned addr));
static __inline void hidewin __P((struct dgm_softc *sc));
static __inline void towin __P((struct dgm_softc *sc, int win));
/*Helg: to allow recursive dgm...() calls */
typedef struct
{ /* If we were called and don't want to disturb we need: */
int port; /* write to this port */
u_char data; /* this data on exit */
/* or DATA_WINOFF to close memory window on entry */
} BoardMemWinState; /* so several channels and even boards can coexist */
#define DATA_WINOFF 0
static BoardMemWinState bmws;
/* return current memory window state and close window */
static BoardMemWinState
bmws_get(void)
{
BoardMemWinState bmwsRet=bmws;
if(bmws.data!=DATA_WINOFF)
outb(bmws.port, bmws.data=DATA_WINOFF);
return bmwsRet;
}
/* restore memory window state */
static void
bmws_set(BoardMemWinState ws)
{
if(ws.data != bmws.data || ws.port!=bmws.port ) {
if(bmws.data!=DATA_WINOFF)
outb(bmws.port,DATA_WINOFF);
if(ws.data!=DATA_WINOFF)
outb(ws.port, ws.data);
bmws=ws;
}
}
static __inline int
setwin(sc,addr)
struct dgm_softc *sc;
unsigned int addr;
{
outb(bmws.port=sc->port+1,bmws.data=FEPWIN|(addr >> 15));
return (addr & 0x7FFF);
}
static __inline void
hidewin(sc)
struct dgm_softc *sc;
{
bmws.data=0;
outb(bmws.port=sc->port+1, bmws.data);
}
static __inline void
towin(sc,win)
struct dgm_softc *sc;
int win;
{
outb(bmws.port=sc->port+1, bmws.data=win);
}
static int
dgmprobe(dev)
struct isa_device *dev;
{
struct dgm_softc *sc= &dgm_softc[dev->id_unit];
int i, v;
int unit=dev->id_unit;
static int once;
if (!once++)
cdevsw_add(&dgm_cdevsw);
sc->unit=dev->id_unit;
sc->port=dev->id_iobase;
if(dev->id_flags & DGBFLAG_ALTPIN)
sc->altpin=1;
else
sc->altpin=0;
/* left 24 bits only (ISA address) */
sc->pmem=((intptr_t)(void *)dev->id_maddr & 0xFFFFFF);
DPRINT4(DB_INFO,"dgm%d: port 0x%x mem 0x%lx\n",unit,sc->port,sc->pmem);
outb(sc->port, FEPRST);
sc->status=DISABLED;
for(i=0; i< 1000; i++) {
DELAY(1);
if( (inb(sc->port) & FEPMASK) == FEPRST ) {
sc->status=ENABLED;
DPRINT3(DB_EXCEPT,"dgm%d: got reset after %d us\n",unit,i);
break;
}
}
if(sc->status!=ENABLED) {
DPRINT2(DB_EXCEPT,"dgm%d: failed to respond\n",dev->id_unit);
return 0;
}
/* check type of card and get internal memory characteristics */
v = inb(sc->port);
if (!(v & 0x1)) {
int second;
outb(sc->port, 1);
second = inb(sc->port);
printf("dgm%d: PC/Xem (type %d, %d)\n", dev->id_unit, v, second);
} else
printf("dgm%d: PC/Xem (type %d)\n", dev->id_unit, v);
sc->type=PCXEM;
sc->mem_seg=0x8000;
/* save size of vizible memory segment */
/* all PCXEMs have a 32k window size */
dev->id_msize=0x8000;
/* map memory */
dev->id_maddr=sc->vmem=pmap_mapdev(sc->pmem,dev->id_msize);
outb(sc->port, FEPCLR); /* drop RESET */
hidewin(sc); /* Helg: to set initial bmws state */
return 4; /* we need I/O space of 4 ports */
}
static int
dgmattach(dev)
struct isa_device *dev;
{
int unit=dev->id_unit;
struct dgm_softc *sc= &dgm_softc[dev->id_unit];
int i, t;
u_char *mem;
u_char *ptr;
int addr;
struct dgm_p *port;
volatile struct board_chan *bc;
int shrinkmem;
int lowwater;
static int nports=0;
if(sc->status!=ENABLED) {
DPRINT2(DB_EXCEPT,"dbg%d: try to attach a disabled card\n",unit);
return 0;
}
mem=sc->vmem;
DPRINT3(DB_INFO,"dgm%d: internal memory segment 0x%x\n",unit,sc->mem_seg);
outb(sc->port, FEPRST); DELAY(1);
for(i=0; (inb(sc->port) & FEPMASK) != FEPRST ; i++) {
if(i>10000) {
printf("dgm%d: 1st reset failed\n",dev->id_unit);
sc->status=DISABLED;
hidewin(sc);
return 0;
}
DELAY(1);
}
DPRINT3(DB_INFO,"dgm%d: got reset after %d us\n",unit,i);
t=(((u_long)sc->pmem>>8)) /* disable windowing */;
outb(sc->port+2,t & 0xFF);
outb(sc->port+3,t>>8);
mem=sc->vmem;
/* very short memory test */
addr=setwin(sc,BOTWIN);
*(u_long *)(mem+addr) = 0xA55A3CC3;
if(*(u_long *)(mem+addr)!=0xA55A3CC3) {
printf("dgm%d: 1st memory test failed\n",dev->id_unit);
sc->status=DISABLED;
hidewin(sc);
return 0;
}
addr=setwin(sc,TOPWIN);
*(u_long *)(mem+addr) = 0x5AA5C33C;
if(*(u_long *)(mem+addr)!=0x5AA5C33C) {
printf("dgm%d: 2nd memory test failed\n",dev->id_unit);
sc->status=DISABLED;
hidewin(sc);
return 0;
}
addr=setwin(sc,BIOSCODE+((0xF000-sc->mem_seg)<<4));
*(u_long *)(mem+addr) = 0x5AA5C33C;
if(*(u_long *)(mem+addr)!=0x5AA5C33C) {
printf("dgm%d: 3rd (BIOS) memory test failed\n",dev->id_unit);
}
addr=setwin(sc,MISCGLOBAL);
for(i=0; i<16; i++) {
mem[addr+i]=0;
}
addr=setwin(sc,BIOSOFFSET);
ptr=mem+addr;
for(i=0; ptr<mem+dev->id_msize; i++){
*ptr++ = pcem_bios[i];
}
ptr=mem+BIOSOFFSET;
for(i=0; ptr<mem+dev->id_msize; i++){
if(*ptr++ != pcem_bios[i]){
printf("Low BIOS load failed\n");
sc->status = DISABLED;
hidewin(sc);
return 0;
}
}
addr=setwin(sc,dev->id_msize);
ptr =mem+addr;
for(;i < pcem_nbios; i++){
*ptr++ = pcem_bios[i];
}
ptr=mem;
for(i = dev->id_msize - BIOSOFFSET; i < pcem_nbios; i++){
if(*ptr++ != pcem_bios[i]){
printf("High BIOS load failed\n");
sc->status = DISABLED;
hidewin(sc);
return 0;
}
}
printf("dgm%d: DigiBIOS loaded, initializing",dev->id_unit);
addr=setwin(sc,0);
*(u_int *)(mem+addr+0)=0x0bf00401;
*(u_int *)(mem+addr+4)=0;
*(ushort *)(mem+addr+0xc00)=0;
outb(sc->port, 0);
for(i = 0;*(u_char *)(mem+addr+ 0xc00) != 0x47;i++){
DELAY(10000);
if(i> 3000){
printf("\nBIOS initialize failed(1)\n");
sc->status = DISABLED;
hidewin(sc);
return 0;
}
}
if(*(u_char *)(mem+addr+ 0xc01) != 0x44){
printf("\nBIOS initialize failed(2)\n");
sc->status = DISABLED;
hidewin(sc);
return 0;
}
printf(", DigiBIOS running\n");
DELAY(10000);
addr=setwin(sc,BIOSOFFSET);
ptr=mem+addr;
for(i=0; i<pcem_ncook; i++){
*ptr++ = pcem_cook[i];
}
ptr=mem+BIOSOFFSET;
for(i=0; i<pcem_ncook; i++){
if(*ptr++ != pcem_cook[i]){
printf("FEP/OS load failed\n");
sc->status = DISABLED;
hidewin(sc);
return 0;
}
}
printf("dgm%d: FEP/OS loaded, initializing",dev->id_unit);
addr=setwin(sc,0);
*(ushort *)(mem+addr+0xd20)=0;
*(u_int *)(mem+addr+0xc34)=0xbfc01004;
*(u_int *)(mem+addr+0xc30)=0x3L;
outb(sc->port,0);
for(i = 0;*(u_char *)(mem+addr+ 0xd20) != 'O';i++){
DELAY(10000);
if(i> 3000){
printf("\nFEP/OS initialize failed(1)\n");
sc->status = DISABLED;
hidewin(sc);
return 0;
}
}
if(*(u_char *)(mem+addr+ 0xd21) != 'S'){
printf("\nFEP/OS initialize failed(2)\n");
sc->status = DISABLED;
hidewin(sc);
return 0;
}
printf(", FEP/OS running\n");
sc->numports= *(ushort *)(mem+setwin(sc,NPORT));
printf("dgm%d: %d ports\n",unit,sc->numports);
if(sc->numports > MAX_DGM_PORTS) {
printf("dgm%d: too many ports\n",unit);
sc->status=DISABLED;
hidewin(sc);
return 0;
}
if(nports+sc->numports>NDGMPORTS) {
printf("dgm%d: only %d ports are usable\n", unit, NDGMPORTS-nports);
sc->numports=NDGMPORTS-nports;
}
/* allocate port and tty structures */
sc->ports=&dgm_ports[nports];
sc->ttys=&dgm_tty[nports];
nports+=sc->numports;
for(i=0; i<sc->numports; i++)
sc->ports[i].status = ENABLED;
/* We should now init per-port structures */
setwin(sc,0);
bc=(volatile struct board_chan *)(mem + CHANSTRUCT);
sc->mailbox=(volatile struct global_data *)(mem + FEP_GLOBAL);
if(sc->numports<3)
shrinkmem=1;
else
shrinkmem=0;
for(i=0; i<sc->numports; i++, bc++) {
port= &sc->ports[i];
port->tty=&sc->ttys[i];
port->unit=unit;
port->brdchan=bc;
port->dcd=CD;
port->dsr=DSR;
port->pnum=i;
if(shrinkmem) {
DPRINT2(DB_INFO,"dgm%d: shrinking memory\n",unit);
fepcmd(port, SETBUFFER, 32, 0, 0, 0);
shrinkmem=0;
}
port->txptr=mem+( ((bc->tseg)<<4) & 0x7FFF );
port->rxptr=mem+( ((bc->rseg)<<4) & 0x7FFF );
port->txwin=FEPWIN | ((bc->tseg)>>11);
port->rxwin=FEPWIN | ((bc->rseg)>>11);
port->txbufhead=0;
port->rxbufhead=0;
port->txbufsize=bc->tmax+1;
port->rxbufsize=bc->rmax+1;
lowwater= (port->txbufsize>=2000) ? 1024 : (port->txbufsize/2);
setwin(sc,0);
fepcmd(port, STXLWATER, lowwater, 0, 10, 0);
fepcmd(port, SRXLWATER, port->rxbufsize/4, 0, 10, 0);
fepcmd(port, SRXHWATER, 3*port->rxbufsize/4, 0, 10, 0);
bc->edelay=100;
bc->idata=1;
port->startc=bc->startc;
port->startca=bc->startca;
port->stopc=bc->stopc;
port->stopca=bc->stopca;
/*port->close_delay=50;*/
port->close_delay=3 * hz;
port->do_timestamp=0;
port->do_dcd_timestamp=0;
/*
* We don't use all the flags from <sys/ttydefaults.h> since they
* are only relevant for logins. It's important to have echo off
* initially so that the line doesn't start blathering before the
* echo flag can be turned off.
*/
port->it_in.c_iflag = TTYDEF_IFLAG;
port->it_in.c_oflag = TTYDEF_OFLAG;
port->it_in.c_cflag = TTYDEF_CFLAG;
port->it_in.c_lflag = TTYDEF_LFLAG;
termioschars(&port->it_in);
port->it_in.c_ispeed = port->it_in.c_ospeed = dgmdefaultrate;
port->it_out = port->it_in;
make_dev(&dgm_cdevsw, (unit*65536)+i,
UID_ROOT, GID_WHEEL, 0600, "ttyM%d%x", unit, i + 0xa0);
make_dev(&dgm_cdevsw, (unit*65536)+i+64,
UID_ROOT, GID_WHEEL, 0600, "ttyiM%d%x", unit, i + 0xa0);
make_dev(&dgm_cdevsw, (unit*65536)+i+128,
UID_ROOT, GID_WHEEL, 0600, "ttylM%d%x", unit, i + 0xa0);
make_dev(&dgm_cdevsw, (unit*65536)+i+262144,
UID_UUCP, GID_DIALER, 0660, "cuaM%d%x", unit, i + 0xa0);
make_dev(&dgm_cdevsw, (unit*65536)+i+262208,
UID_UUCP, GID_DIALER, 0660, "cuaiM%d%x", unit, i + 0xa0);
make_dev(&dgm_cdevsw, (unit*65536)+i+262272,
UID_UUCP, GID_DIALER, 0660, "cualM%d%x", unit, i + 0xa0);
}
hidewin(sc);
/* register the polling function */
timeout(dgmpoll, (void *)unit, hz/POLLSPERSEC);
return 1;
}
/* ARGSUSED */
static int
dgmopen(dev, flag, mode, p)
dev_t dev;
int flag;
int mode;
struct proc *p;
{
struct dgm_softc *sc;
struct tty *tp;
int unit;
int mynor;
int pnum;
struct dgm_p *port;
int s,cs;
int error;
volatile struct board_chan *bc;
error=0;
mynor=minor(dev);
unit=MINOR_TO_UNIT(mynor);
pnum=MINOR_TO_PORT(mynor);
if(unit >= NDGM) {
DPRINT2(DB_EXCEPT,"dgm%d: try to open a nonexisting card\n",unit);
return ENXIO;
}
sc=&dgm_softc[unit];
if(sc->status!=ENABLED) {
DPRINT2(DB_EXCEPT,"dgm%d: try to open a disabled card\n",unit);
return ENXIO;
}
if(pnum>=sc->numports) {
DPRINT3(DB_EXCEPT,"dgm%d: try to open non-existing port %d\n",unit,pnum);
return ENXIO;
}
if(mynor & CONTROL_MASK)
return 0;
tp=&sc->ttys[pnum];
dev->si_tty = tp;
port=&sc->ports[pnum];
bc=port->brdchan;
open_top:
s=spltty();
while(port->closing) {
error=tsleep(&port->closing, TTOPRI|PCATCH, "dgocl", 0);
if(error) {
DPRINT4(DB_OPEN,"dgm%d: port%d: tsleep(dgocl) error=%d\n",unit,pnum,error);
goto out;
}
}
if (tp->t_state & TS_ISOPEN) {
/*
* The device is open, so everything has been initialized.
* Handle conflicts.
*/
if (mynor & CALLOUT_MASK) {
if (!port->active_out) {
error = EBUSY;
DPRINT4(DB_OPEN,"dgm%d: port%d: BUSY error=%d\n",unit,pnum,error);
goto out;
}
} else {
if (port->active_out) {
if (flag & O_NONBLOCK) {
error = EBUSY;
DPRINT4(DB_OPEN,"dgm%d: port%d: BUSY error=%d\n",unit,pnum,error);
goto out;
}
error = tsleep(&port->active_out,
TTIPRI | PCATCH, "dgmi", 0);
if (error != 0) {
DPRINT4(DB_OPEN,"dgm%d: port%d: tsleep(dgmi) error=%d\n",
unit,pnum,error);
goto out;
}
splx(s);
goto open_top;
}
}
if (tp->t_state & TS_XCLUDE &&
suser(p)) {
error = EBUSY;
goto out;
}
} else {
/*
* The device isn't open, so there are no conflicts.
* Initialize it. Initialization is done twice in many
* cases: to preempt sleeping callin opens if we are
* callout, and to complete a callin open after DCD rises.
*/
tp->t_oproc=dgmstart;
tp->t_param=dgmparam;
tp->t_stop=dgmstop;
tp->t_dev=dev;
tp->t_termios= (mynor & CALLOUT_MASK) ?
port->it_out :
port->it_in;
cs=splclock();
setwin(sc,0);
port->imodem=bc->mstat;
bc->rout=bc->rin; /* clear input queue */
bc->idata=1;
#ifdef PRINT_BUFSIZE
printf("dgm buffers tx=%x:%x rx=%x:%x\n",bc->tseg,bc->tmax,bc->rseg,bc->rmax);
#endif
hidewin(sc);
splx(cs);
port->wopeners++;
error=dgmparam(tp, &tp->t_termios);
port->wopeners--;
if(error!=0) {
DPRINT4(DB_OPEN,"dgm%d: port%d: dgmparam error=%d\n",unit,pnum,error);
goto out;
}
/* handle fake DCD for callout devices */
/* and initial DCD */
if( (port->imodem & port->dcd) || mynor & CALLOUT_MASK )
linesw[tp->t_line].l_modem(tp,1);
}
/*
* Wait for DCD if necessary.
*/
if (!(tp->t_state & TS_CARR_ON) && !(mynor & CALLOUT_MASK)
&& !(tp->t_cflag & CLOCAL) && !(flag & O_NONBLOCK)) {
++port->wopeners;
error = tsleep(TSA_CARR_ON(tp), TTIPRI | PCATCH, "dgdcd", 0);
--port->wopeners;
if (error != 0) {
DPRINT4(DB_OPEN,"dgm%d: port%d: tsleep(dgdcd) error=%d\n",unit,pnum,error);
goto out;
}
splx(s);
goto open_top;
}
error = linesw[tp->t_line].l_open(dev, tp);
disc_optim(tp,&tp->t_termios);
DPRINT4(DB_OPEN,"dgm%d: port%d: l_open error=%d\n",unit,pnum,error);
if (tp->t_state & TS_ISOPEN && mynor & CALLOUT_MASK)
port->active_out = TRUE;
port->used=1;
/* If any port is open (i.e. the open() call is completed for it)
* the device is busy
*/
out:
disc_optim(tp,&tp->t_termios);
splx(s);
if( !(tp->t_state & TS_ISOPEN) && port->wopeners==0 )
dgmhardclose(port);
DPRINT4(DB_OPEN,"dgm%d: port%d: open() returns %d\n",unit,pnum,error);
return error;
}
/*ARGSUSED*/
static int
dgmclose(dev, flag, mode, p)
dev_t dev;
int flag;
int mode;
struct proc *p;
{
int mynor;
struct tty *tp;
int unit, pnum;
struct dgm_softc *sc;
struct dgm_p *port;
int s;
int i;
mynor=minor(dev);
if(mynor & CONTROL_MASK)
return 0;
unit=MINOR_TO_UNIT(mynor);
pnum=MINOR_TO_PORT(mynor);
sc=&dgm_softc[unit];
tp=&sc->ttys[pnum];
port=sc->ports+pnum;
DPRINT3(DB_CLOSE,"dgm%d: port%d: closing\n",unit,pnum);
DPRINT3(DB_CLOSE,"dgm%d: port%d: draining port\n",unit,pnum);
dgm_drain_or_flush(port);
s=spltty();
port->closing=1;
DPRINT3(DB_CLOSE,"dgm%d: port%d: closing line disc\n",unit,pnum);
linesw[tp->t_line].l_close(tp,flag);
disc_optim(tp,&tp->t_termios);
DPRINT3(DB_CLOSE,"dgm%d: port%d: hard closing\n",unit,pnum);
dgmhardclose(port);
DPRINT3(DB_CLOSE,"dgm%d: port%d: closing tty\n",unit,pnum);
ttyclose(tp);
port->closing=0;
wakeup(&port->closing);
port->used=0;
/* mark the card idle when all ports are closed */
for(i=0; i<sc->numports; i++)
if(sc->ports[i].used)
break;
splx(s);
DPRINT3(DB_CLOSE,"dgm%d: port%d: closed\n",unit,pnum);
wakeup(TSA_CARR_ON(tp));
wakeup(&port->active_out);
port->active_out=0;
DPRINT3(DB_CLOSE,"dgm%d: port%d: close exit\n",unit,pnum);
return 0;
}
static void
dgmhardclose(port)
struct dgm_p *port;
{
struct dgm_softc *sc=&dgm_softc[port->unit];
volatile struct board_chan *bc=port->brdchan;
int cs;
cs=splclock();
port->do_timestamp = 0;
setwin(sc,0);
bc->idata=0; bc->iempty=0; bc->ilow=0;
if(port->tty->t_cflag & HUPCL) {
port->omodem &= ~(RTS|DTR);
fepcmd(port, SETMODEM, 0, DTR|RTS, 0, 1);
}
hidewin(sc);
splx(cs);
timeout(dgm_pause, &port->brdchan, hz/2);
tsleep(&port->brdchan, TTIPRI | PCATCH, "dgclo", 0);
}
static void
dgm_pause(chan)
void *chan;
{
wakeup((caddr_t)chan);
}
static void
dgmpoll(unit_c)
void *unit_c;
{
int unit=(int)unit_c;
int pnum;
struct dgm_p *port;
struct dgm_softc *sc=&dgm_softc[unit];
int head, tail;
u_char *eventbuf;
int event, mstat, lstat;
volatile struct board_chan *bc;
struct tty *tp;
int rhead, rtail;
int whead, wtail;
int size;
u_char *ptr;
int ocount;
int ibuf_full,obuf_full;
BoardMemWinState ws=bmws_get();
if(sc->status==DISABLED) {
printf("dgm%d: polling of disabled board stopped\n",unit);
return;
}
setwin(sc,0);
head=sc->mailbox->ein;
tail=sc->mailbox->eout;
while(head!=tail) {
if(head >= FEP_IMAX-FEP_ISTART
|| tail >= FEP_IMAX-FEP_ISTART
|| (head|tail) & 03 ) {
printf("dgm%d: event queue's head or tail is wrong! hd=%d,tl=%d\n", unit,head,tail);
break;
}
eventbuf=sc->vmem+tail+FEP_ISTART;
pnum=eventbuf[0];
event=eventbuf[1];
mstat=eventbuf[2];
lstat=eventbuf[3];
port=&sc->ports[pnum];
bc=port->brdchan;
tp=&sc->ttys[pnum];
if(pnum>=sc->numports || port->status==DISABLED) {
printf("dgm%d: port%d: got event on nonexisting port\n",unit,pnum);
} else if(port->used || port->wopeners>0 ) {
int wrapmask=port->rxbufsize-1;
if( !(event & ALL_IND) )
printf("dgm%d: port%d: ? event 0x%x mstat 0x%x lstat 0x%x\n",
unit, pnum, event, mstat, lstat);
if(event & DATA_IND) {
DPRINT3(DB_DATA,"dgm%d: port%d: DATA_IND\n",unit,pnum);
rhead=bc->rin & wrapmask;
rtail=bc->rout & wrapmask;
if( !(tp->t_cflag & CREAD) || !port->used ) {
bc->rout=rhead;
goto end_of_data;
}
if(bc->orun) {
printf("dgm%d: port%d: overrun\n", unit, pnum);
bc->orun=0;
}
if(!(tp->t_state & TS_ISOPEN))
goto end_of_data;
for(ibuf_full=FALSE;rhead!=rtail && !ibuf_full;) {
DPRINT5(DB_RXDATA,"dgm%d: port%d: p rx head=%d tail=%d\n",
unit,pnum,rhead,rtail);
if(rhead>rtail)
size=rhead-rtail;
else
size=port->rxbufsize-rtail;
ptr=port->rxptr+rtail;
/* Helg: */
if( tp->t_rawq.c_cc + size > DGB_IBUFSIZE ) {
size=DGB_IBUFSIZE-tp->t_rawq.c_cc;
DPRINT1(DB_RXDATA,"*");
ibuf_full=TRUE;
}
if(size) {
if (tp->t_state & TS_CAN_BYPASS_L_RINT) {
DPRINT1(DB_RXDATA,"!");
towin(sc,port->rxwin);
tk_nin += size;
tk_rawcc += size;
tp->t_rawcc += size;
b_to_q(ptr,size,&tp->t_rawq);
setwin(sc,0);
} else {
int i=size;
unsigned char chr;
do {
towin(sc,port->rxwin);
chr= *ptr++;
hidewin(sc);
(*linesw[tp->t_line].l_rint)(chr, tp);
} while (--i > 0 );
setwin(sc,0);
}
}
rtail= (rtail + size) & wrapmask;
bc->rout=rtail;
rhead=bc->rin & wrapmask;
hidewin(sc);
ttwakeup(tp);
setwin(sc,0);
}
end_of_data: ;
}
if(event & MODEMCHG_IND) {
DPRINT3(DB_MODEM,"dgm%d: port%d: MODEMCHG_IND\n",unit,pnum);
port->imodem=mstat;
if(mstat & port->dcd) {
hidewin(sc);
linesw[tp->t_line].l_modem(tp,1);
setwin(sc,0);
wakeup(TSA_CARR_ON(tp));
} else {
hidewin(sc);
linesw[tp->t_line].l_modem(tp,0);
setwin(sc,0);
if( port->draining) {
port->draining=0;
wakeup(&port->draining);
}
}
}
if(event & BREAK_IND) {
if((tp->t_state & TS_ISOPEN) && (tp->t_iflag & IGNBRK)) {
DPRINT3(DB_BREAK,"dgm%d: port%d: BREAK_IND\n",unit,pnum);
hidewin(sc);
linesw[tp->t_line].l_rint(TTY_BI, tp);
setwin(sc,0);
}
}
/* Helg: with output flow control */
if(event & (LOWTX_IND | EMPTYTX_IND) ) {
DPRINT3(DB_TXDATA,"dgm%d: port%d: LOWTX_IND or EMPTYTX_IND\n",unit,pnum);
if( (event & EMPTYTX_IND ) && tp->t_outq.c_cc==0
&& port->draining) {
port->draining=0;
wakeup(&port->draining);
bc->ilow=0; bc->iempty=0;
} else {
int wrapmask=port->txbufsize-1;
for(obuf_full=FALSE; tp->t_outq.c_cc!=0 && !obuf_full; ) {
int s;
/* add "last-minute" data to write buffer */
if(!(tp->t_state & TS_BUSY)) {
hidewin(sc);
#ifndef TS_ASLEEP /* post 2.0.5 FreeBSD */
ttwwakeup(tp);
#else
if(tp->t_outq.c_cc <= tp->t_lowat) {
if(tp->t_state & TS_ASLEEP) {
tp->t_state &= ~TS_ASLEEP;
wakeup(TSA_OLOWAT(tp));
}
/* selwakeup(&tp->t_wsel); */
}
#endif
setwin(sc,0);
}
s=spltty();
whead=bc->tin & wrapmask;
wtail=bc->tout & wrapmask;
if(whead<wtail)
size=wtail-whead-1;
else {
size=port->txbufsize-whead;
if(wtail==0)
size--;
}
if(size==0) {
DPRINT5(DB_WR,"dgm: head=%d tail=%d size=%d full=%d\n",
whead,wtail,size,obuf_full);
bc->iempty=1; bc->ilow=1;
obuf_full=TRUE;
splx(s);
break;
}
towin(sc,port->txwin);
ocount=q_to_b(&tp->t_outq, port->txptr+whead, size);
whead+=ocount;
setwin(sc,0);
bc->tin=whead;
bc->tin=whead & wrapmask;
splx(s);
}
if(obuf_full) {
DPRINT1(DB_WR," +BUSY\n");
tp->t_state|=TS_BUSY;
} else {
DPRINT1(DB_WR," -BUSY\n");
hidewin(sc);
#ifndef TS_ASLEEP /* post 2.0.5 FreeBSD */
/* should clear TS_BUSY before ttwwakeup */
if(tp->t_state & TS_BUSY) {
tp->t_state &= ~TS_BUSY;
linesw[tp->t_line].l_start(tp);
ttwwakeup(tp);
}
#else
if(tp->t_state & TS_ASLEEP) {
tp->t_state &= ~TS_ASLEEP;
wakeup(TSA_OLOWAT(tp));
}
tp->t_state &= ~TS_BUSY;
#endif
setwin(sc,0);
}
}
}
bc->idata=1; /* require event on incoming data */
} else {
bc=port->brdchan;
DPRINT4(DB_EXCEPT,"dgm%d: port%d: got event 0x%x on closed port\n",
unit,pnum,event);
bc->rout=bc->rin;
bc->idata=bc->iempty=bc->ilow=0;
}
tail= (tail+4) & (FEP_IMAX-FEP_ISTART-4);
}
sc->mailbox->eout=tail;
bmws_set(ws);
timeout(dgmpoll, unit_c, hz/POLLSPERSEC);
}
static int
dgmioctl(dev, cmd, data, flag, p)
dev_t dev;
u_long cmd;
caddr_t data;
int flag;
struct proc *p;
{
struct dgm_softc *sc;
int unit, pnum;
struct dgm_p *port;
int mynor;
struct tty *tp;
volatile struct board_chan *bc;
int error;
int s,cs;
int tiocm_xxx;
#if defined(COMPAT_43) || defined(COMPAT_SUNOS)
u_long oldcmd;
struct termios term;
#endif
BoardMemWinState ws=bmws_get();
mynor=minor(dev);
unit=MINOR_TO_UNIT(mynor);
pnum=MINOR_TO_PORT(mynor);
sc=&dgm_softc[unit];
port=&sc->ports[pnum];
tp=&sc->ttys[pnum];
bc=port->brdchan;
if (mynor & CONTROL_MASK) {
struct termios *ct;
switch (mynor & CONTROL_MASK) {
case CONTROL_INIT_STATE:
ct = mynor & CALLOUT_MASK ? &port->it_out : &port->it_in;
break;
case CONTROL_LOCK_STATE:
ct = mynor & CALLOUT_MASK ? &port->lt_out : &port->lt_in;
break;
default:
return (ENODEV); /* /dev/nodev */
}
switch (cmd) {
case TIOCSETA:
error = suser(p);
if (error != 0)
return (error);
*ct = *(struct termios *)data;
return (0);
case TIOCGETA:
*(struct termios *)data = *ct;
return (0);
case TIOCGETD:
*(int *)data = TTYDISC;
return (0);
case TIOCGWINSZ:
bzero(data, sizeof(struct winsize));
return (0);
default:
return (ENOTTY);
}
}
#if defined(COMPAT_43) || defined(COMPAT_SUNOS)
term = tp->t_termios;
if (cmd == TIOCSETA || cmd == TIOCSETAW || cmd == TIOCSETAF) {
DPRINT6(DB_PARAM,"dgm%d: port%d: dgmioctl-ISNOW c=0x%x i=0x%x l=0x%x\n",unit,pnum,term.c_cflag,term.c_iflag,term.c_lflag);
}
oldcmd = cmd;
error = ttsetcompat(tp, &cmd, data, &term);
if (error != 0)
return (error);
if (cmd != oldcmd)
data = (caddr_t)&term;
#endif
if (cmd == TIOCSETA || cmd == TIOCSETAW || cmd == TIOCSETAF) {
int cc;
struct termios *dt = (struct termios *)data;
struct termios *lt = mynor & CALLOUT_MASK
? &port->lt_out : &port->lt_in;
DPRINT6(DB_PARAM,"dgm%d: port%d: dgmioctl-TOSET c=0x%x i=0x%x l=0x%x\n",unit,pnum,dt->c_cflag,dt->c_iflag,dt->c_lflag);
dt->c_iflag = (tp->t_iflag & lt->c_iflag)
| (dt->c_iflag & ~lt->c_iflag);
dt->c_oflag = (tp->t_oflag & lt->c_oflag)
| (dt->c_oflag & ~lt->c_oflag);
dt->c_cflag = (tp->t_cflag & lt->c_cflag)
| (dt->c_cflag & ~lt->c_cflag);
dt->c_lflag = (tp->t_lflag & lt->c_lflag)
| (dt->c_lflag & ~lt->c_lflag);
for (cc = 0; cc < NCCS; ++cc)
if (lt->c_cc[cc] != 0)
dt->c_cc[cc] = tp->t_cc[cc];
if (lt->c_ispeed != 0)
dt->c_ispeed = tp->t_ispeed;
if (lt->c_ospeed != 0)
dt->c_ospeed = tp->t_ospeed;
}
if(cmd==TIOCSTOP) {
cs=splclock();
setwin(sc,0);
fepcmd(port, PAUSETX, 0, 0, 0, 0);
bmws_set(ws);
splx(cs);
return 0;
} else if(cmd==TIOCSTART) {
cs=splclock();
setwin(sc,0);
fepcmd(port, RESUMETX, 0, 0, 0, 0);
bmws_set(ws);
splx(cs);
return 0;
}
if(cmd==TIOCSETAW || cmd==TIOCSETAF)
port->mustdrain=1;
error = linesw[tp->t_line].l_ioctl(tp, cmd, data, flag, p);
if (error != ENOIOCTL)
return error;
s = spltty();
error = ttioctl(tp, cmd, data, flag);
disc_optim(tp,&tp->t_termios);
port->mustdrain=0;
if (error != ENOIOCTL) {
splx(s);
if (cmd == TIOCSETA || cmd == TIOCSETAW || cmd == TIOCSETAF) {
DPRINT6(DB_PARAM,"dgm%d: port%d: dgmioctl-RES c=0x%x i=0x%x l=0x%x\n",unit,pnum,tp->t_cflag,tp->t_iflag,tp->t_lflag);
}
return error;
}
switch (cmd) {
case TIOCSBRK:
/* Helg: commented */
/* error=dgmdrain(port);*/
if(error!=0) {
splx(s);
return error;
}
cs=splclock();
setwin(sc,0);
/* now it sends 250 millisecond break because I don't know */
/* how to send an infinite break */
fepcmd(port, SENDBREAK, 250, 0, 10, 0);
hidewin(sc);
splx(cs);
break;
case TIOCCBRK:
/* now it's empty */
break;
case TIOCSDTR:
DPRINT3(DB_MODEM,"dgm%d: port%d: set DTR\n",unit,pnum);
port->omodem |= DTR;
cs=splclock();
setwin(sc,0);
fepcmd(port, SETMODEM, port->omodem, RTS, 0, 1);
if( !(bc->mstat & DTR) ) {
DPRINT3(DB_MODEM,"dgm%d: port%d: DTR is off\n",unit,pnum);
}
hidewin(sc);
splx(cs);
break;
case TIOCCDTR:
DPRINT3(DB_MODEM,"dgm%d: port%d: reset DTR\n",unit,pnum);
port->omodem &= ~DTR;
cs=splclock();
setwin(sc,0);
fepcmd(port, SETMODEM, port->omodem, RTS|DTR, 0, 1);
if( bc->mstat & DTR ) {
DPRINT3(DB_MODEM,"dgm%d: port%d: DTR is on\n",unit,pnum);
}
hidewin(sc);
splx(cs);
break;
case TIOCMSET:
if(*(int *)data & TIOCM_DTR)
port->omodem |=DTR;
else
port->omodem &=~DTR;
if(*(int *)data & TIOCM_RTS)
port->omodem |=RTS;
else
port->omodem &=~RTS;
cs=splclock();
setwin(sc,0);
fepcmd(port, SETMODEM, port->omodem, RTS|DTR, 0, 1);
hidewin(sc);
splx(cs);
break;
case TIOCMBIS:
if(*(int *)data & TIOCM_DTR)
port->omodem |=DTR;
if(*(int *)data & TIOCM_RTS)
port->omodem |=RTS;
cs=splclock();
setwin(sc,0);
fepcmd(port, SETMODEM, port->omodem, RTS|DTR, 0, 1);
hidewin(sc);
splx(cs);
break;
case TIOCMBIC:
if(*(int *)data & TIOCM_DTR)
port->omodem &=~DTR;
if(*(int *)data & TIOCM_RTS)
port->omodem &=~RTS;
cs=splclock();
setwin(sc,0);
fepcmd(port, SETMODEM, port->omodem, RTS|DTR, 0, 1);
hidewin(sc);
splx(cs);
break;
case TIOCMGET:
setwin(sc,0);
port->imodem=bc->mstat;
hidewin(sc);
tiocm_xxx = TIOCM_LE; /* XXX - always enabled while open */
DPRINT3(DB_MODEM,"dgm%d: port%d: modem stat -- ",unit,pnum);
if (port->imodem & DTR) {
DPRINT1(DB_MODEM,"DTR ");
tiocm_xxx |= TIOCM_DTR;
}
if (port->imodem & RTS) {
DPRINT1(DB_MODEM,"RTS ");
tiocm_xxx |= TIOCM_RTS;
}
if (port->imodem & CTS) {
DPRINT1(DB_MODEM,"CTS ");
tiocm_xxx |= TIOCM_CTS;
}
if (port->imodem & port->dcd) {
DPRINT1(DB_MODEM,"DCD ");
tiocm_xxx |= TIOCM_CD;
}
if (port->imodem & port->dsr) {
DPRINT1(DB_MODEM,"DSR ");
tiocm_xxx |= TIOCM_DSR;
}
if (port->imodem & RI) {
DPRINT1(DB_MODEM,"RI ");
tiocm_xxx |= TIOCM_RI;
}
*(int *)data = tiocm_xxx;
DPRINT1(DB_MODEM,"--\n");
break;
case TIOCMSDTRWAIT:
/* must be root since the wait applies to following logins */
error = suser(p);
if (error != 0) {
splx(s);
return (error);
}
port->close_delay = *(int *)data * hz / 100;
break;
case TIOCMGDTRWAIT:
*(int *)data = port->close_delay * 100 / hz;
break;
case TIOCTIMESTAMP:
port->do_timestamp = TRUE;
*(struct timeval *)data = port->timestamp;
break;
case TIOCDCDTIMESTAMP:
port->do_dcd_timestamp = TRUE;
*(struct timeval *)data = port->dcd_timestamp;
break;
default:
bmws_set(ws);
splx(s);
return ENOTTY;
}
bmws_set(ws);
splx(s);
return 0;
}
static void
wakeflush(p)
void *p;
{
struct dgm_p *port=p;
wakeup(&port->draining);
}
/* wait for the output to drain */
static int
dgmdrain(port)
struct dgm_p *port;
{
struct dgm_softc *sc=&dgm_softc[port->unit];
volatile struct board_chan *bc=port->brdchan;
int error;
int head, tail;
BoardMemWinState ws=bmws_get();
setwin(sc,0);
bc->iempty=1;
tail=bc->tout;
head=bc->tin;
while(tail!=head) {
DPRINT5(DB_WR,"dgm%d: port%d: drain: head=%d tail=%d\n",
port->unit, port->pnum, head, tail);
hidewin(sc);
port->draining=1;
timeout(wakeflush,port, hz);
error=tsleep(&port->draining, TTIPRI | PCATCH, "dgdrn", 0);
port->draining=0;
setwin(sc,0);
if (error != 0) {
DPRINT4(DB_WR,"dgm%d: port%d: tsleep(dgdrn) error=%d\n",
port->unit,port->pnum,error);
bc->iempty=0;
bmws_set(ws);
return error;
}
tail=bc->tout;
head=bc->tin;
}
DPRINT5(DB_WR,"dgm%d: port%d: drain: head=%d tail=%d\n",
port->unit, port->pnum, head, tail);
bmws_set(ws);
return 0;
}
/* wait for the output to drain */
/* or simply clear the buffer it it's stopped */
static void
dgm_drain_or_flush(port)
struct dgm_p *port;
{
struct tty *tp=port->tty;
struct dgm_softc *sc=&dgm_softc[port->unit];
volatile struct board_chan *bc=port->brdchan;
int error;
int lasttail;
int head, tail;
setwin(sc,0);
lasttail=-1;
bc->iempty=1;
tail=bc->tout;
head=bc->tin;
while(tail!=head /* && tail!=lasttail */ ) {
DPRINT5(DB_WR,"dgm%d: port%d: flush: head=%d tail=%d\n",
port->unit, port->pnum, head, tail);
/* if there is no carrier simply clean the buffer */
if( !(tp->t_state & TS_CARR_ON) ) {
bc->tout=bc->tin=0;
bc->iempty=0;
hidewin(sc);
return;
}
hidewin(sc);
port->draining=1;
timeout(wakeflush,port, hz);
error=tsleep(&port->draining, TTIPRI | PCATCH, "dgfls", 0);
port->draining=0;
setwin(sc,0);
if (error != 0) {
DPRINT4(DB_WR,"dgm%d: port%d: tsleep(dgfls) error=%d\n",
port->unit,port->pnum,error);
/* silently clean the buffer */
bc->tout=bc->tin=0;
bc->iempty=0;
hidewin(sc);
return;
}
lasttail=tail;
tail=bc->tout;
head=bc->tin;
}
hidewin(sc);
DPRINT5(DB_WR,"dgm%d: port%d: flush: head=%d tail=%d\n",
port->unit, port->pnum, head, tail);
}
static int
dgmparam(tp, t)
struct tty *tp;
struct termios *t;
{
int unit=MINOR_TO_UNIT(minor(tp->t_dev));
int pnum=MINOR_TO_PORT(minor(tp->t_dev));
struct dgm_softc *sc=&dgm_softc[unit];
struct dgm_p *port=&sc->ports[pnum];
volatile struct board_chan *bc=port->brdchan;
int cflag;
int head;
int mval;
int iflag;
int hflow;
int cs;
BoardMemWinState ws=bmws_get();
DPRINT6(DB_PARAM,"dgm%d: port%d: dgmparm c=0x%x i=0x%x l=0x%x\n",unit,pnum,t->c_cflag,t->c_iflag,t->c_lflag);
if(port->mustdrain) {
DPRINT3(DB_PARAM,"dgm%d: port%d: must call dgmdrain()\n",unit,pnum);
dgmdrain(port);
}
cflag=ttspeedtab(t->c_ospeed, dgmspeedtab);
if (t->c_ispeed == 0)
t->c_ispeed = t->c_ospeed;
if (cflag < 0 /* || cflag > 0 && t->c_ispeed != t->c_ospeed */) {
DPRINT4(DB_PARAM,"dgm%d: port%d: invalid cflag=0%o\n",unit,pnum,cflag);
return (EINVAL);
}
cs=splclock();
setwin(sc,0);
if(cflag==0) { /* hangup */
DPRINT3(DB_PARAM,"dgm%d: port%d: hangup\n",unit,pnum);
head=bc->rin;
bc->rout=head;
head=bc->tin;
fepcmd(port, STOUT, (unsigned)head, 0, 0, 0);
mval= port->omodem & ~(DTR|RTS);
} else {
cflag |= dgmflags(dgm_cflags, t->c_cflag);
if(cflag!=port->fepcflag) {
port->fepcflag=cflag;
DPRINT5(DB_PARAM,"dgm%d: port%d: set cflag=0x%x c=0x%x\n",
unit,pnum,cflag,t->c_cflag&~CRTSCTS);
fepcmd(port, SETCTRLFLAGS, (unsigned)cflag, 0, 0, 0);
}
mval= port->omodem | (DTR|RTS);
}
iflag=dgmflags(dgm_iflags, t->c_iflag);
if(iflag!=port->fepiflag) {
port->fepiflag=iflag;
DPRINT5(DB_PARAM,"dgm%d: port%d: set iflag=0x%x c=0x%x\n",unit,pnum,iflag,t->c_iflag);
fepcmd(port, SETIFLAGS, (unsigned)iflag, 0, 0, 0);
}
bc->mint=port->dcd;
hflow=dgmflags(dgm_flow, t->c_cflag);
if(hflow!=port->hflow) {
port->hflow=hflow;
DPRINT5(DB_PARAM,"dgm%d: port%d: set hflow=0x%x f=0x%x\n",unit,pnum,hflow,t->c_cflag&CRTSCTS);
fepcmd(port, SETHFLOW, (unsigned)hflow, 0xff, 0, 1);
}
if(port->omodem != mval) {
DPRINT5(DB_PARAM,"dgm%d: port%d: setting modem parameters 0x%x was 0x%x\n",
unit,pnum,mval,port->omodem);
port->omodem=mval;
fepcmd(port, SETMODEM, (unsigned)mval, RTS|DTR, 0, 1);
}
if(port->fepstartc!=t->c_cc[VSTART] || port->fepstopc!=t->c_cc[VSTOP]) {
DPRINT5(DB_PARAM,"dgm%d: port%d: set startc=%d, stopc=%d\n",unit,pnum,t->c_cc[VSTART],t->c_cc[VSTOP]);
port->fepstartc=t->c_cc[VSTART];
port->fepstopc=t->c_cc[VSTOP];
fepcmd(port, SONOFFC, port->fepstartc, port->fepstopc, 0, 1);
}
bmws_set(ws);
splx(cs);
return 0;
}
static void
dgmstart(tp)
struct tty *tp;
{
int unit;
int pnum;
struct dgm_p *port;
struct dgm_softc *sc;
volatile struct board_chan *bc;
int head, tail;
int size, ocount;
int s;
int wmask;
BoardMemWinState ws=bmws_get();
unit=MINOR_TO_UNIT(minor(tp->t_dev));
pnum=MINOR_TO_PORT(minor(tp->t_dev));
sc=&dgm_softc[unit];
port=&sc->ports[pnum];
bc=port->brdchan;
wmask=port->txbufsize-1;
s=spltty();
while( tp->t_outq.c_cc!=0 ) {
int cs;
#ifndef TS_ASLEEP /* post 2.0.5 FreeBSD */
ttwwakeup(tp);
#else
if(tp->t_outq.c_cc <= tp->t_lowat) {
if(tp->t_state & TS_ASLEEP) {
tp->t_state &= ~TS_ASLEEP;
wakeup(TSA_OLOWAT(tp));
}
/*selwakeup(&tp->t_wsel);*/
}
#endif
cs=splclock();
setwin(sc,0);
head=bc->tin & wmask;
do { tail=bc->tout; } while (tail != bc->tout);
tail=bc->tout & wmask;
DPRINT5(DB_WR,"dgm%d: port%d: s tx head=%d tail=%d\n",unit,pnum,head,tail);
#ifdef LEAVE_FREE_CHARS
if(tail>head) {
size=tail-head-LEAVE_FREE_CHARS;
if (size <0)
size=0;
} else {
size=port->txbufsize-head;
if(tail+port->txbufsize < head)
size=0;
}
}
#else
if(tail>head)
size=tail-head-1;
else {
size=port->txbufsize-head/*-1*/;
if(tail==0)
size--;
}
#endif
if(size==0) {
bc->iempty=1; bc->ilow=1;
splx(cs);
bmws_set(ws);
tp->t_state|=TS_BUSY;
splx(s);
return;
}
towin(sc,port->txwin);
ocount=q_to_b(&tp->t_outq, port->txptr+head, size);
head+=ocount;
if(head>=port->txbufsize)
head-=port->txbufsize;
setwin(sc,0);
bc->tin=head;
DPRINT5(DB_WR,"dgm%d: port%d: tx avail=%d count=%d\n",unit,pnum,size,ocount);
hidewin(sc);
splx(cs);
}
bmws_set(ws);
splx(s);
#ifndef TS_ASLEEP /* post 2.0.5 FreeBSD */
if(tp->t_state & TS_BUSY) {
tp->t_state&=~TS_BUSY;
linesw[tp->t_line].l_start(tp);
ttwwakeup(tp);
}
#else
if(tp->t_state & TS_ASLEEP) {
tp->t_state &= ~TS_ASLEEP;
wakeup(TSA_OLOWAT(tp));
}
tp->t_state&=~TS_BUSY;
#endif
}
void
dgmstop(tp, rw)
struct tty *tp;
int rw;
{
int unit;
int pnum;
struct dgm_p *port;
struct dgm_softc *sc;
volatile struct board_chan *bc;
int s;
BoardMemWinState ws=bmws_get();
unit=MINOR_TO_UNIT(minor(tp->t_dev));
pnum=MINOR_TO_PORT(minor(tp->t_dev));
sc=&dgm_softc[unit];
port=&sc->ports[pnum];
bc=port->brdchan;
DPRINT3(DB_WR,"dgm%d: port%d: stop\n",port->unit, port->pnum);
s = spltty();
setwin(sc,0);
if (rw & FWRITE) {
/* clear output queue */
bc->tout=bc->tin=0;
bc->ilow=0;bc->iempty=0;
}
if (rw & FREAD) {
/* clear input queue */
bc->rout=bc->rin;
bc->idata=1;
}
hidewin(sc);
bmws_set(ws);
splx(s);
dgmstart(tp);
}
static void
fepcmd(port, cmd, op1, op2, ncmds, bytecmd)
struct dgm_p *port;
unsigned cmd, op1, op2, ncmds, bytecmd;
{
struct dgm_softc *sc=&dgm_softc[port->unit];
u_char *mem=sc->vmem;
unsigned tail, head;
int count, n;
if(port->status==DISABLED) {
printf("dgm%d: port%d: FEP command on disabled port\n",
port->unit, port->pnum);
return;
}
/* setwin(sc,0); Require this to be set by caller */
head=sc->mailbox->cin;
if(head>=(FEP_CMAX-FEP_CSTART) || (head & 3)) {
printf("dgm%d: port%d: wrong pointer head of command queue : 0x%x\n",
port->unit, port->pnum, head);
return;
}
mem[head+FEP_CSTART+0]=cmd;
mem[head+FEP_CSTART+1]=port->pnum;
if(bytecmd) {
mem[head+FEP_CSTART+2]=op1;
mem[head+FEP_CSTART+3]=op2;
} else {
mem[head+FEP_CSTART+2]=op1&0xff;
mem[head+FEP_CSTART+3]=(op1>>8)&0xff;
}
DPRINT7(DB_FEP,"dgm%d: port%d: %s cmd=0x%x op1=0x%x op2=0x%x\n", port->unit, port->pnum,
(bytecmd)?"byte":"word", cmd, mem[head+FEP_CSTART+2], mem[head+FEP_CSTART+3]);
head=(head+4) & (FEP_CMAX-FEP_CSTART-4);
sc->mailbox->cin=head;
count=FEPTIMEOUT;
while (count-- != 0) {
head=sc->mailbox->cin;
tail=sc->mailbox->cout;
n = (head-tail) & (FEP_CMAX-FEP_CSTART-4);
if(n <= ncmds * (sizeof(ushort)*4))
return;
}
printf("dgm%d(%d): timeout on FEP cmd=0x%x\n", port->unit, port->pnum, cmd);
}
static void
disc_optim(tp, t)
struct tty *tp;
struct termios *t;
{
if (!(t->c_iflag & (ICRNL | IGNCR | IMAXBEL | INLCR | ISTRIP | IXON))
&& (!(t->c_iflag & BRKINT) || (t->c_iflag & IGNBRK))
&& (!(t->c_iflag & PARMRK)
|| (t->c_iflag & (IGNPAR | IGNBRK)) == (IGNPAR | IGNBRK))
&& !(t->c_lflag & (ECHO | ICANON | IEXTEN | ISIG | PENDIN))
&& linesw[tp->t_line].l_rint == ttyinput)
tp->t_state |= TS_CAN_BYPASS_L_RINT;
else
tp->t_state &= ~TS_CAN_BYPASS_L_RINT;
}
#endif /* NDGM > 0 */
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