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4beaf036a6
freebsd/sys/dev/dgb/dgb.c
Bruce Evans c9e1c95d1d Fixed missing quote in a devfs string.
1996-03-29 11:39:08 +00:00

2079 lines
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/*-
* dgb.c $Id: dgb.c,v 1.16 1996/03/28 14:27:26 scrappy Exp $
*
* Digiboard driver.
*
* Stage 1. "Better than nothing".
*
* 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
*/
#include "dgb.h"
#if NDGB > 0
/* the overall number of ports controlled by this driver */
#ifndef NDGBPORTS
# define NDGBPORTS (NDGB*16)
#endif
#include <sys/param.h>
#include <sys/systm.h>
#include <sys/reboot.h>
#include <sys/ioctl.h>
#include <sys/tty.h>
#include <sys/proc.h>
#include <sys/conf.h>
#include <sys/dkstat.h>
#include <sys/file.h>
#include <sys/uio.h>
#include <sys/kernel.h>
#include <sys/sysctl.h>
#include <sys/malloc.h>
#include <sys/syslog.h>
#include <sys/devconf.h>
#ifdef DEVFS
#include <sys/devfsext.h>
#endif /*DEVFS*/
#include <machine/clock.h>
#include <vm/vm.h>
#include <vm/vm_param.h>
#include <vm/pmap.h>
#include <i386/isa/isa.h>
#include <i386/isa/isa_device.h>
#include <gnu/i386/isa/dgbios.h>
#include <gnu/i386/isa/dgfep.h>
#include <gnu/i386/isa/dgreg.h>
#define CALLOUT_MASK 0x80
#define CONTROL_MASK 0x60
#define CONTROL_INIT_STATE 0x20
#define CONTROL_LOCK_STATE 0x40
#define UNIT_MASK 0x30000
#define PORT_MASK 0x1F
#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 dgb_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;
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;
/* 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 dgbparam() */
#ifdef DEVFS
struct {
void *tty;
void *init;
void *lock;
void *cua;
} devfs_token;
#endif
};
/* Digiboard per-board structure */
struct dgb_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 ? */
ushort numports; /* number of ports on card */
ushort port; /* I/O port */
u_char *vmem; /* virtual memory address */
long pmem; /* physical memory address */
int mem_seg; /* internal memory segment */
struct dgb_p *ports; /* pointer to array of port descriptors */
struct tty *ttys; /* pointer to array of TTY structures */
volatile struct global_data *mailbox;
};
static struct dgb_softc dgb_softc[NDGB];
static struct dgb_p dgb_ports[NDGBPORTS];
static struct tty dgb_tty[NDGBPORTS];
/*
* The public functions in the com module ought to be declared in a com-driver
* system header.
*/
/* Interrupt handling entry points. */
static void dgbintr __P((int unit));
static void dgbpoll __P((void *unit_c));
/* Device switch entry points. */
#define dgbreset noreset
#define dgbmmap nommap
#define dgbstrategy nostrategy
static int dgbattach __P((struct isa_device *dev));
static int dgbprobe __P((struct isa_device *dev));
static void dgbregisterdev __P((struct isa_device *id));
static void fepcmd(struct dgb_p *port, int cmd, int op1, int op2,
int ncmds, int bytecmd);
static void dgbstart __P((struct tty *tp));
static int dgbparam __P((struct tty *tp, struct termios *t));
static void dgbhardclose __P((struct dgb_p *port));
static void dgb_drain_or_flush __P((struct dgb_p *port));
static int dgbdrain __P((struct dgb_p *port));
static void dgb_pause __P((void *chan));
static void wakeflush __P((void *p));
struct isa_driver dgbdriver = {
dgbprobe, dgbattach, "dgb",0
};
static d_open_t dgbopen;
static d_close_t dgbclose;
static d_read_t dgbread;
static d_write_t dgbwrite;
static d_ioctl_t dgbioctl;
static d_stop_t dgbstop;
static d_devtotty_t dgbdevtotty;
#define CDEV_MAJOR 58
static struct cdevsw dgb_cdevsw =
{ dgbopen, dgbclose, dgbread, dgbwrite, /*58*/
dgbioctl, dgbstop, noreset, dgbdevtotty, /* dgb */
ttselect, nommap, NULL, "dgb", NULL, -1 };
static speed_t dgbdefaultrate = TTYDEF_SPEED;
static u_int dgb_events; /* input chars + weighted output completions */
static int dgbmajor;
static struct speedtab dgbspeedtab[] = {
0, 0, /* old (sysV-like) Bx codes */
50, 1,
75, 2,
110, 3,
134, 4,
150, 5,
200, 6,
300, 7,
600, 8,
1200, 9,
1800, 10,
2400, 11,
4800, 12,
9600, 13,
19200, 14,
38400, 15,
57600, (02000 | 1), /* B50 & fast baud table */
115200, (02000 | 2), /* B100 & fast baud table */
-1, -1
};
static int dgbdebug=0;
SYSCTL_INT(_debug, OID_AUTO, dgb_debug, CTLFLAG_RW,
&dgbdebug, 0, "");
static int polltimeout=0;
static int setwin __P((struct dgb_softc *sc, unsigned addr));
static int setinitwin __P((struct dgb_softc *sc, unsigned addr));
static void hidewin __P((struct dgb_softc *sc));
static void towin __P((struct dgb_softc *sc, int win));
static inline int
setwin(sc,addr)
struct dgb_softc *sc;
unsigned int addr;
{
if(sc->type==PCXEVE) {
outb(sc->port+1, FEPWIN|(addr>>13));
DPRINT3("dgb%d: switched to window 0x%x\n",sc->unit,addr>>13);
return (addr & 0x1FFF);
} else {
outb(sc->port,FEPMEM);
return addr;
}
}
static inline int
setinitwin(sc,addr)
struct dgb_softc *sc;
unsigned int addr;
{
if(sc->type==PCXEVE) {
outb(sc->port+1, FEPWIN|(addr>>13));
DPRINT3("dgb%d: switched to window 0x%x\n",sc->unit,addr>>13);
return (addr & 0x1FFF);
} else {
outb(sc->port,inb(sc->port)|FEPMEM);
return addr;
}
}
static inline void
hidewin(sc)
struct dgb_softc *sc;
{
if(sc->type==PCXEVE)
outb(sc->port+1, 0);
else
outb(sc->port,0);
}
static inline void
towin(sc,win)
struct dgb_softc *sc;
int win;
{
if(sc->type==PCXEVE) {
outb(sc->port+1, win);
} else {
outb(sc->port,FEPMEM);
}
}
static int
dgbprobe(dev)
struct isa_device *dev;
{
struct dgb_softc *sc= &dgb_softc[dev->id_unit];
int i, v, t;
u_long win_size; /* size of vizible memory window */
u_char *mem;
int addr;
int unit=dev->id_unit;
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=((long)dev->id_maddr & 0xFFFFFF);
DPRINT4("dgb%d: port 0x%x mem 0x%x\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("dgb%d: got reset after %d us\n",unit,i);
break;
}
}
if(sc->status!=ENABLED) {
DPRINT2("dgb%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 ) {
switch( v&0x30 ) {
case 0:
sc->mem_seg=0xF000;
win_size=0x10000;
printf("dgb%d: PC/Xi 64K\n",dev->id_unit);
break;
case 0x10:
sc->mem_seg=0xE000;
win_size=0x20000;
printf("dgb%d: PC/Xi 128K\n",dev->id_unit);
break;
case 0x20:
sc->mem_seg=0xC000;
win_size=0x40000;
printf("dgb%d: PC/Xi 256K\n",dev->id_unit);
break;
default: /* case 0x30: */
sc->mem_seg=0x8000;
win_size=0x80000;
printf("dgb%d: PC/Xi 512K\n",dev->id_unit);
break;
}
sc->type=PCXI;
} else {
outb(sc->port, 1);
v=inb(sc->port);
if( v & 0x1 ) {
printf("dgb%d: PC/Xm isn't supported\n",dev->id_unit);
sc->status=DISABLED;
return 0;
}
sc->mem_seg=0xF000;
if(dev->id_flags==DGBFLAG_NOWIN || ( v&0xC0 )==0) {
win_size=0x10000;
printf("dgb%d: PC/Xe 64K\n",dev->id_unit);
sc->type=PCXE;
} else {
win_size=0x2000;
printf("dgb%d: PC/Xe 64/8K (windowed)\n",dev->id_unit);
sc->type=PCXEVE;
if((u_long)sc->pmem & ~0xFFE000) {
printf("dgb%d: warning: address 0x%x truncated to 0x%x\n",
dev->id_unit, sc->pmem,
(long)sc->pmem & 0xFFE000);
dev->id_maddr= (u_char *)( (long)sc->pmem & 0xFFE000 );
}
}
}
/* save size of vizible memory segment */
dev->id_msize=win_size;
/* map memory */
dev->id_maddr=sc->vmem=pmap_mapdev(sc->pmem,dev->id_msize);
outb(sc->port, FEPCLR); /* drop RESET */
return 4; /* we need I/O space of 4 ports */
}
static struct kern_devconf kdc_dgb[NDGB];
static struct kern_devconf kdc_dgb_init = {
0, 0, 0, /* filled in by dev_attach */
"dgb", 0, { MDDT_ISA, 0, "tty" },
isa_generic_externalize, 0, 0, ISA_EXTERNALLEN,
&kdc_isa0, /* parent */
0, /* parentdata */
DC_UNCONFIGURED,
"DigiBoard multiport card",
DC_CLS_SERIAL,
};
static void
dgbregisterdev(id)
struct isa_device *id;
{
int unit;
unit = id->id_unit;
kdc_dgb[unit] = kdc_dgb_init;
kdc_dgb[unit].kdc_unit = unit;
kdc_dgb[unit].kdc_isa = id;
/* no ports are open yet */
kdc_dgb[unit].kdc_state = DC_IDLE;
dev_attach(&kdc_dgb[unit]);
}
static int
dgbattach(dev)
struct isa_device *dev;
{
int unit=dev->id_unit;
struct dgb_softc *sc= &dgb_softc[dev->id_unit];
int i, t;
u_char *mem;
u_char *ptr;
int addr;
struct dgb_p *port;
struct board_chan *bc;
struct global_data *gd;
int shrinkmem;
int nfails;
ushort *pstat;
int lowwater;
int nports=0;
if(sc->status!=ENABLED) {
DPRINT2("dbg%d: try to attach a disabled card\n",unit);
return 0;
}
mem=sc->vmem;
DPRINT3("dgb%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("dgb%d: 1st reset failed\n",dev->id_unit);
sc->status=DISABLED;
hidewin(sc);
return 0;
}
DELAY(1);
}
DPRINT3("dgb%d: got reset after %d us\n",unit,i);
/* for PCXEVE set up interrupt and base address */
if(sc->type==PCXEVE) {
t=(((u_long)sc->pmem>>8) & 0xFFE0) | 0x10 /* enable windowing */;
/* IRQ isn't used */
#if 0
switch(dev->id_irq) {
case IRQ3:
t|=0x1;
break;
case IRQ5:
t|=2;
break;
case IRQ7:
t|=3;
break;
case IRQ10:
t|=4;
break;
case IRQ11:
t|=5;
break;
case IRQ12:
t|=6;
break;
case IRQ15:
t|=7;
break;
default:
printf("dgb%d: wrong IRQ mask 0x%x\n",dev->id_unit,dev->id_irq);
sc->status=DISABLED;
return 0;
}
#endif
outb(sc->port+2,t & 0xFF);
outb(sc->port+3,t>>8);
} else if(sc->type==PCXE) {
t=(((u_long)sc->pmem>>8) & 0xFFE0) /* disable windowing */;
outb(sc->port+2,t & 0xFF);
outb(sc->port+3,t>>8);
}
if(sc->type==PCXI || sc->type==PCXE) {
outb(sc->port, FEPRST|FEPMEM); DELAY(1);
for(i=0; (inb(sc->port) & FEPMASK) != (FEPRST|FEPMEM) ; i++) {
if(i>10000) {
printf("dgb%d: 2nd reset failed\n",dev->id_unit);
sc->status=DISABLED;
hidewin(sc);
return 0;
}
DELAY(1);
}
DPRINT3("dgb%d: got memory after %d us\n",unit,i);
}
mem=sc->vmem;
/* very short memory test */
addr=setinitwin(sc,BOTWIN);
*(u_long *)(mem+addr) = 0xA55A3CC3;
if(*(u_long *)(mem+addr)!=0xA55A3CC3) {
printf("dgb%d: 1st memory test failed\n",dev->id_unit);
sc->status=DISABLED;
hidewin(sc);
return 0;
}
addr=setinitwin(sc,TOPWIN);
*(u_long *)(mem+addr) = 0x5AA5C33C;
if(*(u_long *)(mem+addr)!=0x5AA5C33C) {
printf("dgb%d: 2nd memory test failed\n",dev->id_unit);
sc->status=DISABLED;
hidewin(sc);
return 0;
}
addr=setinitwin(sc,BIOSCODE+((0xF000-sc->mem_seg)<<4));
*(u_long *)(mem+addr) = 0x5AA5C33C;
if(*(u_long *)(mem+addr)!=0x5AA5C33C) {
printf("dgb%d: 3rd (BIOS) memory test failed\n",dev->id_unit);
}
addr=setinitwin(sc,MISCGLOBAL);
for(i=0; i<16; i++) {
mem[addr+i]=0;
}
if(sc->type==PCXI || sc->type==PCXE) {
addr=BIOSCODE+((0xF000-sc->mem_seg)<<4);
DPRINT3("dgb%d: BIOS local address=0x%x\n",unit,addr);
ptr= mem+addr;
for(i=0; i<pcxx_nbios; i++, ptr++)
*ptr = pcxx_bios[i];
ptr= mem+addr;
nfails=0;
for(i=0; i<pcxx_nbios; i++, ptr++)
if( *ptr != pcxx_bios[i] ) {
DPRINT5("dgb%d: wrong code in BIOS at addr 0x%x : \
0x%x instead of 0x%x\n", unit, ptr-(mem+addr), *ptr, pcxx_bios[i] );
if(++nfails>=5) {
printf("dgb%d: 4th memory test (BIOS load) fails\n",unit);
break;
}
}
outb(sc->port,FEPMEM);
for(i=0; (inb(sc->port) & FEPMASK) != FEPMEM ; i++) {
if(i>10000) {
printf("dgb%d: BIOS start failed\n",dev->id_unit);
sc->status=DISABLED;
hidewin(sc);
return 0;
}
DELAY(1);
}
DPRINT3("dgb%d: reset dropped after %d us\n",unit,i);
for(i=0; i<200000; i++) {
if( *((ushort *)(mem+MISCGLOBAL)) == *((ushort *)"GD") )
goto load_fep;
DELAY(1);
}
printf("dgb%d: BIOS download failed\n",dev->id_unit);
DPRINT4("dgb%d: code=0x%x must be 0x%x\n",
dev->id_unit,
*((ushort *)(mem+MISCGLOBAL)),
*((ushort *)"GD"));
sc->status=DISABLED;
hidewin(sc);
return 0;
}
if(sc->type==PCXEVE) {
/* set window 7 */
outb(sc->port+1,0xFF);
ptr= mem+(BIOSCODE & 0x1FFF);
for(i=0; i<pcxx_nbios; i++)
*ptr++ = pcxx_bios[i];
ptr= mem+(BIOSCODE & 0x1FFF);
nfails=0;
for(i=0; i<pcxx_nbios; i++, ptr++)
if( *ptr != pcxx_bios[i] ) {
DPRINT5("dgb%d: wrong code in BIOS at addr 0x%x : \
0x%x instead of 0x%x\n", unit, ptr-(mem+addr), *ptr, pcxx_bios[i] );
if(++nfails>=5) {
printf("dgb%d: 4th memory test (BIOS load) fails\n",unit);
break;
}
}
outb(sc->port,FEPCLR);
setwin(sc,0);
for(i=0; (inb(sc->port) & FEPMASK) != FEPCLR ; i++) {
if(i>10000) {
printf("dgb%d: BIOS start failed\n",dev->id_unit);
sc->status=DISABLED;
hidewin(sc);
return 0;
}
DELAY(1);
}
DPRINT3("dgb%d: reset dropped after %d us\n",unit,i);
addr=setwin(sc,MISCGLOBAL);
for(i=0; i<200000; i++) {
if(*(ushort *)(mem+addr)== *(ushort *)"GD")
goto load_fep;
DELAY(1);
}
printf("dgb%d: BIOS download failed\n",dev->id_unit);
DPRINT5("dgb%d: Error#(0x%x,0x%x) code=0x%x\n",
dev->id_unit,
*(ushort *)(mem+0xC12),
*(ushort *)(mem+0xC14),
*(ushort *)(mem+MISCGLOBAL));
sc->status=DISABLED;
hidewin(sc);
return 0;
}
load_fep:
DPRINT2("dgb%d: BIOS loaded\n",dev->id_unit);
addr=setwin(sc,FEPCODE);
ptr= mem+addr;
for(i=0; i<pcxx_ncook; i++)
*ptr++ = pcxx_cook[i];
addr=setwin(sc,MBOX);
*(ushort *)(mem+addr+ 0)=2;
*(ushort *)(mem+addr+ 2)=sc->mem_seg+FEPCODESEG;
*(ushort *)(mem+addr+ 4)=0;
*(ushort *)(mem+addr+ 6)=FEPCODESEG;
*(ushort *)(mem+addr+ 8)=0;
*(ushort *)(mem+addr+10)=pcxx_ncook;
outb(sc->port,FEPMEM|FEPINT); /* send interrupt to BIOS */
outb(sc->port,FEPMEM);
for(i=0; *(ushort *)(mem+addr)!=0; i++) {
if(i>200000) {
printf("dgb%d: FEP code download failed\n",unit);
DPRINT3("dgb%d: code=0x%x must be 0\n", unit,
*(ushort *)(mem+addr));
sc->status=DISABLED;
hidewin(sc);
return 0;
}
}
DPRINT2("dgb%d: FEP code loaded\n",unit);
*(ushort *)(mem+setwin(sc,FEPSTAT))=0;
addr=setwin(sc,MBOX);
*(ushort *)(mem+addr+0)=1;
*(ushort *)(mem+addr+2)=FEPCODESEG;
*(ushort *)(mem+addr+4)=0x4;
outb(sc->port,FEPINT); /* send interrupt to BIOS */
outb(sc->port,FEPCLR);
addr=setwin(sc,FEPSTAT);
for(i=0; *(ushort *)(mem+addr)!= *(ushort *)"OS"; i++) {
if(i>200000) {
printf("dgb%d: FEP/OS start failed\n",dev->id_unit);
sc->status=DISABLED;
hidewin(sc);
return 0;
}
}
DPRINT2("dgb%d: FEP/OS started\n",dev->id_unit);
sc->numports= *(ushort *)(mem+setwin(sc,NPORT));
printf("dgb%d: %d ports\n",unit,sc->numports);
if(sc->numports > MAX_DGB_PORTS) {
printf("dgb%d: too many ports\n",unit);
sc->status=DISABLED;
hidewin(sc);
return 0;
}
if(nports+sc->numports>NDGBPORTS) {
printf("dgb%d: only %d ports are usable\n", unit, NDGBPORTS-nports);
sc->numports=NDGBPORTS-nports;
}
/* allocate port and tty structures */
sc->ports=&dgb_ports[nports];
sc->ttys=&dgb_tty[nports];
nports+=sc->numports;
addr=setwin(sc,PORTBASE);
pstat=(ushort *)(mem+addr);
for(i=0; i<sc->numports && pstat[i]; i++)
if(pstat[i])
sc->ports[i].status=ENABLED;
else {
sc->ports[i].status=DISABLED;
printf("dgb%d: port %d is broken\n", unit, i);
}
/* We should now init per-port structures */
bc=(struct board_chan *)(mem + CHANSTRUCT);
sc->mailbox=(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;
if(sc->altpin) {
port->dsr=CD;
port->dcd=DSR;
} else {
port->dcd=CD;
port->dsr=DSR;
}
port->pnum=i;
if(shrinkmem) {
DPRINT2("dgb%d: shrinking memory\n",unit);
fepcmd(port, SETBUFFER, 32, 0, 0, 0);
shrinkmem=0;
}
if(sc->type!=PCXEVE) {
port->txptr=mem+((bc->tseg-sc->mem_seg)<<4);
port->rxptr=mem+((bc->rseg-sc->mem_seg)<<4);
port->txwin=port->rxwin=0;
} else {
port->txptr=mem+( ((bc->tseg-sc->mem_seg)<<4) & 0x1FFF );
port->rxptr=mem+( ((bc->rseg-sc->mem_seg)<<4) & 0x1FFF );
port->txwin=FEPWIN | ((bc->tseg-sc->mem_seg)>>9);
port->rxwin=FEPWIN | ((bc->rseg-sc->mem_seg)>>9);
}
port->txbufhead=0;
port->rxbufhead=0;
port->txbufsize=bc->tmax+1;
port->rxbufsize=bc->rmax+1;
lowwater= (port->txbufsize>=2000) ? 1024 : (port->txbufsize/2);
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;
/*
* 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 = dgbdefaultrate;
port->it_out = port->it_in;
#ifdef DEVFS
/*XXX*/ /* fix the minor numbers */
port->devfs_token.tty =
devfs_add_devswf(&dgb_cdevsw,
(unit*32)+i,/*mytical number*/
DV_CHR, 0, 0, 0600, "dgb%d.%d", unit,
i);
port->devfs_token.tty =
devfs_add_devswf(&dgb_cdevsw,
(unit*32)+i+64,/*mytical number*/
DV_CHR, 0, 0, 0600, "idgb%d.%d", unit,
i);
port->devfs_token.tty =
devfs_add_devswf(&dgb_cdevsw,
(unit*32)+i+128,/*mytical number*/
DV_CHR, 0, 0, 0600, "ldgb%d.%d", unit,
i);
port->devfs_token.tty =
devfs_add_devswf(&dgb_cdevsw,
(unit*32)+i+192,/*mytical number*/
DV_CHR, 0, 0, 0600, "dgbcua%d.%d",
unit, i);
#endif
}
hidewin(sc);
dgbregisterdev(dev);
/* register the polling function */
timeout(dgbpoll, (void *)unit, hz/25);
return 1;
}
/* ARGSUSED */
static int
dgbopen(dev, flag, mode, p)
dev_t dev;
int flag;
int mode;
struct proc *p;
{
struct dgb_softc *sc;
struct tty *tp;
int unit;
int mynor;
int pnum;
struct dgb_p *port;
int s;
int error;
struct board_chan *bc;
error=0;
mynor=minor(dev);
unit=MINOR_TO_UNIT(mynor);
pnum=MINOR_TO_PORT(mynor);
if(unit >= NDGB) {
DPRINT2("dgb%d: try to open a nonexisting card\n",unit);
return ENXIO;
}
sc=&dgb_softc[unit];
if(sc->status!=ENABLED) {
DPRINT2("dgb%d: try to open a disabled card\n",unit);
return ENXIO;
}
if(pnum>=sc->numports) {
DPRINT3("dgb%d: try to open non-existing port %d\n",unit,pnum);
return ENXIO;
}
if(mynor & CONTROL_MASK)
return 0;
tp=&sc->ttys[pnum];
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("dgb%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("dgb%d: port %d: BUSY error=%d\n",unit,pnum,error);
goto out;
}
} else {
if (port->active_out) {
if (flag & O_NONBLOCK) {
error = EBUSY;
DPRINT4("dgb%d: port %d: BUSY error=%d\n",unit,pnum,error);
goto out;
}
error = tsleep(&port->active_out,
TTIPRI | PCATCH, "dgbi", 0);
if (error != 0) {
DPRINT4("dgb%d: port %d: tsleep(dgbi) error=%d\n",
unit,pnum,error);
goto out;
}
splx(s);
goto open_top;
}
}
if (tp->t_state & TS_XCLUDE && p->p_ucred->cr_uid != 0) {
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=dgbstart;
tp->t_param=dgbparam;
tp->t_dev=dev;
tp->t_termios= (mynor & CALLOUT_MASK) ?
port->it_out :
port->it_in;
setwin(sc,0);
port->imodem=bc->mstat;
bc->rout=bc->rin; /* clear input queue */
bc->idata=1;
hidewin(sc);
port->wopeners++;
error=dgbparam(tp, &tp->t_termios);
port->wopeners--;
if(error!=0) {
DPRINT4("dgb%d: port %d: dgbparam error=%d\n",unit,pnum,error);
goto out;
}
ttsetwater(tp);
/* 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("dgb%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);
DPRINT4("dgb%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
*/
kdc_dgb[unit].kdc_state = DC_BUSY;
out:
splx(s);
if( !(tp->t_state & TS_ISOPEN) && port->wopeners==0 )
dgbhardclose(port);
DPRINT4("dgb%d: port %d: open() returns %d\n",unit,pnum,error);
return error;
}
/*ARGSUSED*/
static int
dgbclose(dev, flag, mode, p)
dev_t dev;
int flag;
int mode;
struct proc *p;
{
int mynor;
struct tty *tp;
int unit, pnum;
struct dgb_softc *sc;
struct dgb_p *port;
int s;
int i;
mynor=minor(dev);
unit=MINOR_TO_UNIT(mynor);
pnum=MINOR_TO_PORT(mynor);
sc=&dgb_softc[unit];
tp=&sc->ttys[pnum];
port=sc->ports+pnum;
if(mynor & CONTROL_MASK)
return 0;
DPRINT3("dgb%d: port %d: closing\n",unit,pnum);
s=spltty();
port->closing=1;
linesw[tp->t_line].l_close(tp,flag);
dgb_drain_or_flush(port);
dgbhardclose(port);
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;
if(i>= sc->numports)
kdc_dgb[unit].kdc_state = DC_IDLE;
splx(s);
wakeup(TSA_CARR_ON(tp));
wakeup(&port->active_out);
port->active_out=0;
return 0;
}
static void
dgbhardclose(port)
struct dgb_p *port;
{
struct dgb_softc *sc=&dgb_softc[port->unit];
struct board_chan *bc=port->brdchan;
int s;
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);
timeout(dgb_pause, &port->brdchan, hz/2);
tsleep(&port->brdchan, TTIPRI | PCATCH, "dgclo", 0);
}
static void
dgb_pause(chan)
void *chan;
{
wakeup((caddr_t)chan);
}
static int
dgbread(dev, uio, flag)
dev_t dev;
struct uio *uio;
int flag;
{
int mynor;
struct tty *tp;
int error, unit, pnum;
mynor=minor(dev);
if (mynor & CONTROL_MASK)
return (ENODEV);
unit=MINOR_TO_UNIT(mynor);
pnum=MINOR_TO_PORT(mynor);
tp=&dgb_softc[unit].ttys[pnum];
error=linesw[tp->t_line].l_read(tp, uio, flag);
DPRINT4("dgb%d: port %d: read() returns %d\n",unit,pnum,error);
return error;
}
static int
dgbwrite(dev, uio, flag)
dev_t dev;
struct uio *uio;
int flag;
{
int mynor;
struct tty *tp;
int error, unit, pnum;
mynor=minor(dev);
if (mynor & CONTROL_MASK)
return (ENODEV);
unit=MINOR_TO_UNIT(mynor);
pnum=MINOR_TO_PORT(mynor);
tp=&dgb_softc[unit].ttys[pnum];
error=linesw[tp->t_line].l_write(tp, uio, flag);
DPRINT4("dgb%d: port %d: write() returns %d\n",unit,pnum,error);
return error;
}
static void
dgbpoll(unit_c)
void *unit_c;
{
int unit=(int)unit_c;
int pnum;
struct dgb_p *port;
struct dgb_softc *sc=&dgb_softc[unit];
int head, tail;
u_char *eventbuf;
int event, mstat, lstat;
struct board_chan *bc;
struct tty *tp;
int rhead, rtail;
int whead, wtail;
int wrapmask;
int size;
int c=0;
u_char *ptr;
int ocount;
if(sc->status==DISABLED) {
printf("dgb%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("dgb%d: event queue's head or tail is wrong!\n", unit);
break;
}
eventbuf=sc->vmem+tail+FEP_ISTART;
pnum=eventbuf[0];
event=eventbuf[1];
mstat=eventbuf[2];
lstat=eventbuf[3];
port=&sc->ports[pnum];
tp=&sc->ttys[pnum];
if(pnum>=sc->numports || port->status==DISABLED) {
printf("dgb%d: port %d: got event on nonexisting port\n",unit,pnum);
} else if(port->used || port->wopeners>0 ) {
bc=port->brdchan;
if( !(event & ALL_IND) )
printf("dgb%d: port%d: ? event 0x%x mstat 0x%x lstat 0x%x\n",
unit, pnum, event, mstat, lstat);
if(event & DATA_IND) {
DPRINT3("dgb%d: port %d: DATA_IND\n",unit,pnum);
wrapmask=port->rxbufsize-1;
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("dgb%d: port%d: overrun\n", unit, pnum);
bc->orun=0;
}
while(rhead!=rtail) {
DPRINT5("dgb%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;
for(c=0; c<size; c++) {
int chr;
towin(sc,port->rxwin);
chr= *ptr++;
#if 0
if(chr>=' ' && chr<127)
DPRINT4("dgb%d: port %d: got char '%c'\n",
unit,pnum,chr);
else
DPRINT4("dgb%d: port %d: got char 0x%x\n",
unit,pnum,chr);
#endif
hidewin(sc);
linesw[tp->t_line].l_rint(chr, tp);
}
setwin(sc,0);
rtail= (rtail + size) & wrapmask;
bc->rout=rtail;
rhead=bc->rin & wrapmask;
}
end_of_data:
}
if(event & MODEMCHG_IND) {
DPRINT3("dgb%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) {
DPRINT3("dgb%d: port %d: BREAK_IND\n",unit,pnum);
hidewin(sc);
linesw[tp->t_line].l_rint(TTY_BI, tp);
setwin(sc,0);
}
if(event & (LOWTX_IND | EMPTYTX_IND) ) {
DPRINT3("dgb%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;
}
wrapmask=port->txbufsize;
while( tp->t_outq.c_cc!=0 ) {
#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);
whead=bc->tin & wrapmask;
wtail=bc->tout & wrapmask;
DPRINT5("dgb%d: port%d: p tx head=%d tail=%d\n",
unit,pnum,whead,wtail);
if(whead<wtail)
size=wtail-whead-1;
else {
size=port->txbufsize-whead;
if(wtail==0)
size--;
}
if(size==0) {
bc->iempty=1; bc->ilow=1;
goto end_of_buffer;
}
towin(sc,port->txwin);
ocount=q_to_b(&tp->t_outq, port->txptr+whead, size);
whead+=ocount;
setwin(sc,0);
bc->tin=whead;
}
#ifndef TS_ASLEEP /* post 2.0.5 FreeBSD */
ttwwakeup(tp);
#else
if(tp->t_state & TS_ASLEEP) {
tp->t_state &= ~TS_ASLEEP;
wakeup(TSA_OLOWAT(tp));
}
tp->t_state &= ~TS_BUSY;
#endif
end_of_buffer:
}
bc->idata=1;
} else {
bc=port->brdchan;
DPRINT4("dgb%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;
hidewin(sc);
timeout(dgbpoll, unit_c, hz/25);
}
static void
dgbintr(unit)
int unit;
{
}
static int
dgbioctl(dev, cmd, data, flag, p)
dev_t dev;
int cmd;
caddr_t data;
int flag;
struct proc *p;
{
struct dgb_softc *sc;
int unit, pnum;
struct dgb_p *port;
int mynor;
struct tty *tp;
struct board_chan *bc;
int error;
int s;
int tiocm_xxx;
mynor=minor(dev);
unit=MINOR_TO_UNIT(mynor);
pnum=MINOR_TO_PORT(mynor);
sc=&dgb_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->p_ucred, &p->p_acflag);
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 (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;
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) {
setwin(sc,0);
fepcmd(port, PAUSETX, 0, 0, 0, 0);
hidewin(sc);
return 0;
} else if(cmd==TIOCSTART) {
setwin(sc,0);
fepcmd(port, RESUMETX, 0, 0, 0, 0);
hidewin(sc);
return 0;
}
if(cmd==TIOCSETAW || cmd==TIOCSETAF)
port->mustdrain=1;
error = linesw[tp->t_line].l_ioctl(tp, cmd, data, flag, p);
if (error >= 0)
return error;
error = ttioctl(tp, cmd, data, flag);
port->mustdrain=0;
if (error >= 0)
return error;
s = spltty();
switch (cmd) {
case TIOCSBRK:
error=dgbdrain(port);
if(error!=0) {
splx(s);
return error;
}
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);
break;
case TIOCCBRK:
/* now it's empty */
break;
case TIOCSDTR:
DPRINT3("dgb%d: port %d: set DTR\n",unit,pnum);
port->omodem |= DTR;
setwin(sc,0);
fepcmd(port, SETMODEM, port->omodem, RTS, 0, 1);
if( !(bc->mstat & DTR) ) {
DPRINT3("dgb%d: port %d: DTR is off\n",unit,pnum);
}
hidewin(sc);
break;
case TIOCCDTR:
DPRINT3("dgb%d: port %d: reset DTR\n",unit,pnum);
port->omodem &= ~DTR;
setwin(sc,0);
fepcmd(port, SETMODEM, port->omodem, RTS|DTR, 0, 1);
if( bc->mstat & DTR ) {
DPRINT3("dgb%d: port %d: DTR is on\n",unit,pnum);
}
hidewin(sc);
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;
setwin(sc,0);
fepcmd(port, SETMODEM, port->omodem, RTS|DTR, 0, 1);
hidewin(sc);
break;
case TIOCMBIS:
if(*(int *)data & TIOCM_DTR)
port->omodem |=DTR;
if(*(int *)data & TIOCM_RTS)
port->omodem |=RTS;
setwin(sc,0);
fepcmd(port, SETMODEM, port->omodem, RTS|DTR, 0, 1);
hidewin(sc);
break;
case TIOCMBIC:
if(*(int *)data & TIOCM_DTR)
port->omodem &=~DTR;
if(*(int *)data & TIOCM_RTS)
port->omodem &=~RTS;
setwin(sc,0);
fepcmd(port, SETMODEM, port->omodem, RTS|DTR, 0, 1);
hidewin(sc);
break;
case TIOCMGET:
setwin(sc,0);
port->imodem=bc->mstat;
hidewin(sc);
tiocm_xxx = TIOCM_LE; /* XXX - always enabled while open */
DPRINT3("dgb%d: port %d: modem stat -- ",unit,pnum);
if (port->imodem & DTR) {
DPRINT1("DTR ");
tiocm_xxx |= TIOCM_DTR;
}
if (port->imodem & RTS) {
DPRINT1("RTS ");
tiocm_xxx |= TIOCM_RTS;
}
if (port->imodem & CTS) {
DPRINT1("CTS ");
tiocm_xxx |= TIOCM_CTS;
}
if (port->imodem & port->dcd) {
DPRINT1("DCD ");
tiocm_xxx |= TIOCM_CD;
}
if (port->imodem & port->dsr) {
DPRINT1("DSR ");
tiocm_xxx |= TIOCM_DSR;
}
if (port->imodem & RI) {
DPRINT1("RI ");
tiocm_xxx |= TIOCM_RI;
}
*(int *)data = tiocm_xxx;
DPRINT1("--\n");
break;
default:
splx(s);
return ENOTTY;
}
splx(s);
return 0;
}
static void
wakeflush(p)
void *p;
{
struct dgb_p *port=p;
wakeup(&port->draining);
}
/* wait for the output to drain */
static int
dgbdrain(port)
struct dgb_p *port;
{
struct tty *tp=port->tty;
struct dgb_softc *sc=&dgb_softc[port->unit];
struct board_chan *bc=port->brdchan;
int error;
int head, tail;
setwin(sc,0);
bc->iempty=1;
tail=bc->tout;
head=bc->tin;
while(tail!=head) {
DPRINT5("dgb%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("dgb%d: port %d: tsleep(dgdrn) error=%d\n",
port->unit,port->pnum,error);
bc->iempty=0;
hidewin(sc);
return error;
}
tail=bc->tout;
head=bc->tin;
}
DPRINT5("dgb%d: port %d: drain: head=%d tail=%d\n",
port->unit, port->pnum, head, tail);
return 0;
}
/* wait for the output to drain */
/* or simply clear the buffer it it's stopped */
static void
dgb_drain_or_flush(port)
struct dgb_p *port;
{
struct tty *tp=port->tty;
struct dgb_softc *sc=&dgb_softc[port->unit];
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("dgb%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("dgb%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;
}
DPRINT5("dgb%d: port %d: flush: head=%d tail=%d\n",
port->unit, port->pnum, head, tail);
}
static int
dgbparam(tp, t)
struct tty *tp;
struct termios *t;
{
int dev=tp->t_dev;
int mynor=minor(dev);
int unit=MINOR_TO_UNIT(dev);
int pnum=MINOR_TO_PORT(dev);
struct dgb_softc *sc=&dgb_softc[unit];
struct dgb_p *port=&sc->ports[pnum];
struct board_chan *bc=port->brdchan;
int cflag;
int head;
int mval;
int iflag;
int hflow;
int s;
DPRINT3("dgb%d: port%d: setting parameters\n",unit,pnum);
if(port->mustdrain) {
DPRINT3("dgb%d: port%d: must call dgbdrain()\n",unit,pnum);
dgbdrain(port);
}
cflag=ttspeedtab(t->c_ospeed, dgbspeedtab);
if (t->c_ispeed == 0)
t->c_ispeed = t->c_ospeed;
if (cflag < 0 || cflag > 0 && t->c_ispeed != t->c_ospeed)
return (EINVAL);
s=spltty();
setwin(sc,0);
if(cflag==0) { /* hangup */
DPRINT3("dgb%d: port%d: hangup\n",unit,pnum);
head=bc->rin;
bc->rout=head;
head=bc->tin;
fepcmd(port, STOUT, head, 0, 0, 0);
mval= port->omodem & ~(DTR|RTS);
} else {
DPRINT4("dgb%d: port%d: CBAUD=%d\n",unit,pnum,cflag);
/* convert flags to sysV-style values */
if(t->c_cflag & PARODD)
cflag|=01000;
if(t->c_cflag & PARENB)
cflag|=00400;
if(t->c_cflag & CSTOPB)
cflag|=00100;
cflag|= (t->c_cflag & CSIZE) >> 4;
DPRINT4("dgb%d: port%d: CFLAG=0x%x\n",unit,pnum,cflag);
if(cflag!=port->fepcflag) {
DPRINT3("dgb%d: port%d: set cflag\n",unit,pnum);
port->fepcflag=cflag;
fepcmd(port, SETCTRLFLAGS, (unsigned)cflag, 0, 0, 0);
}
mval= port->omodem | (DTR|RTS) ;
}
iflag=t->c_iflag & (IGNBRK|BRKINT|IGNPAR|PARMRK|INPCK|ISTRIP);
if(t->c_cflag & IXON)
cflag|=002000;
if(t->c_cflag & IXANY)
cflag|=004000;
if(t->c_cflag & IXOFF)
cflag|=010000;
if(iflag!=port->fepiflag) {
DPRINT3("dgb%d: port%d: set iflag\n",unit,pnum);
port->fepiflag=iflag;
fepcmd(port, SETIFLAGS, (unsigned)iflag, 0, 0, 0);
}
bc->mint=port->dcd;
if(t->c_cflag & CRTSCTS)
hflow=(CTS|RTS);
else
hflow=0;
if(hflow!=port->hflow) {
DPRINT3("dgb%d: port%d: set hflow\n",unit,pnum);
port->hflow=hflow;
fepcmd(port, SETHFLOW, (unsigned)hflow, 0xff, 0, 1);
}
if(port->omodem != mval) {
DPRINT4("dgb%d: port %d: setting modem parameters 0x%x\n",
unit,pnum,mval);
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]) {
DPRINT3("dgb%d: port%d: set startc, stopc\n",unit,pnum);
port->fepstartc=t->c_cc[VSTART];
port->fepstopc=t->c_cc[VSTOP];
fepcmd(port, SONOFFC, port->fepstartc, port->fepstopc, 0, 1);
}
hidewin(sc);
splx(s);
return 0;
}
static void
dgbstart(tp)
struct tty *tp;
{
int unit;
int pnum;
struct dgb_p *port;
struct dgb_softc *sc;
struct board_chan *bc;
int head, tail;
int size, ocount;
int s;
int wmask;
unit=MINOR_TO_UNIT(minor(tp->t_dev));
pnum=MINOR_TO_PORT(minor(tp->t_dev));
sc=&dgb_softc[unit];
port=&sc->ports[pnum];
bc=port->brdchan;
wmask=port->txbufsize-1;
s=spltty();
while( tp->t_outq.c_cc!=0 ) {
#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);
head=bc->tin & wmask;
tail=bc->tout & wmask;
DPRINT5("dgb%d: port%d: s tx head=%d tail=%d\n",unit,pnum,head,tail);
if(tail>head)
size=tail-head-1;
else {
size=port->txbufsize-head;
if(tail==0)
size--;
}
if(size==0) {
bc->iempty=1; bc->ilow=1;
hidewin(sc);
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;
}
#ifndef TS_ASLEEP /* post 2.0.5 FreeBSD */
ttwwakeup(tp);
#else
if(tp->t_state & TS_ASLEEP) {
tp->t_state &= ~TS_ASLEEP;
wakeup(TSA_OLOWAT(tp));
}
tp->t_state&=~TS_BUSY;
#endif
hidewin(sc);
splx(s);
}
void
dgbstop(tp, rw)
struct tty *tp;
int rw;
{
}
struct tty *
dgbdevtotty(dev)
dev_t dev;
{
int mynor, pnum, unit;
struct dgb_softc *sc;
mynor = minor(dev);
if (mynor & CONTROL_MASK)
return (NULL);
unit = MINOR_TO_UNIT(mynor);
if ((u_int) unit >= NDGB)
return (NULL);
pnum = MINOR_TO_PORT(mynor);
sc = &dgb_softc[unit];
if (pnum >= sc->numports)
return (NULL);
return (&sc->ttys[pnum]);
}
static void
fepcmd(port, cmd, op1, op2, ncmds, bytecmd)
struct dgb_p *port;
int cmd, op1, op2, ncmds, bytecmd;
{
struct dgb_softc *sc=&dgb_softc[port->unit];
u_char *mem=sc->vmem;
unsigned tail, head;
int count, n;
if(port->status==DISABLED) {
printf("dgb%d(%d): FEP command on disabled port\n",
port->unit, port->pnum);
return;
}
setwin(sc,0);
head=sc->mailbox->cin;
if(head>=(FEP_CMAX-FEP_CSTART) || (head & 3)) {
printf("dgb%d(%d): wrong pointer head of command queue : 0x%x\n",
port->unit, port->pnum, head);
return;
}
if(bytecmd) {
mem[head+FEP_CSTART+0]=cmd;
mem[head+FEP_CSTART+1]=port->pnum;
mem[head+FEP_CSTART+2]=op1;
mem[head+FEP_CSTART+3]=op2;
} else {
mem[head+FEP_CSTART+0]=cmd;
mem[head+FEP_CSTART+1]=port->pnum;
*(ushort *)(mem+head+FEP_CSTART+2)=op1;
}
head=(head+4) & (FEP_CMAX-FEP_CSTART-4);
sc->mailbox->cin=head;
for(count=FEPTIMEOUT; count>0; count--) {
head=sc->mailbox->cin;
tail=sc->mailbox->cout;
n=(head-tail) & (FEP_CMAX-FEP_CSTART-4);
if(n <= ncmds * 4)
return;
}
printf("dgb%d(%d): timeout on FEP command\n",
port->unit, port->pnum);
}
static dgb_devsw_installed = 0;
static void
dgb_drvinit(void *unused)
{
dev_t dev;
if( ! dgb_devsw_installed ) {
dev = makedev(CDEV_MAJOR, 0);
cdevsw_add(&dev,&dgb_cdevsw, NULL);
dgb_devsw_installed = 1;
}
}
SYSINIT(dgbdev,SI_SUB_DRIVERS,SI_ORDER_MIDDLE+CDEV_MAJOR,dgb_drvinit,NULL)
#endif /* NDGB > 0 */
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