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freebsd/sys/dev/dgb/dgb.c
Bruce Evans cf8c7b0963 Added D_TTY to the cdevswitch flags for all tty drivers. This is required 
for the Lite2 fix for always returning EIO in dead_read().

Cleaned up the cdevswitch initializers for all tty drivers.

Removed explicit calls to ttsetwater() from all (tty) drivers.  ttsetwater()
is now called centrally for opens, not just for parameter changes.
1998-08-23 08:26:42 +00:00

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/*-
* dgb.c $Id: dgb.c,v 1.39 1998/08/16 01:21:49 bde Exp $
*
* 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 "opt_devfs.h"
#include "dgb.h"
#if NDGB > 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 NDGBPORTS
# define NDGBPORTS (NDGB*16)
#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>
#ifdef DEVFS
#include <sys/devfsext.h>
#endif /*DEVFS*/
#include <machine/clock.h>
#include <vm/vm.h>
#include <vm/pmap.h>
#include <i386/isa/isa_device.h>
#include <gnu/i386/isa/dgbios.h>
#include <gnu/i386/isa/dgfep.h>
#define DGB_DEBUG /* Enable debugging info via sysctl */
#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;
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 dgbparam() */
#ifdef DEVFS
struct {
void *tty;
void *ttyi;
void *ttyl;
void *cua;
void *cuai;
void *cual;
} 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 ? */
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 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 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 fepcmd(struct dgb_p *port, unsigned cmd, unsigned op1, unsigned op2,
unsigned ncmds, unsigned 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));
static void disc_optim __P((struct tty *tp, struct termios *t));
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,
dgbioctl, dgbstop, noreset, dgbdevtotty,
ttpoll, nommap, NULL, "dgb",
NULL, -1, nodump, nopsize,
D_TTY,
};
static speed_t dgbdefaultrate = TTYDEF_SPEED;
static struct speedtab dgbspeedtab[] = {
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;
} dgb_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 }
}, dgb_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 }
}, dgb_flow[] =
{
{ CRTSCTS, CRTSCTS, CTS|RTS },
{ CRTSCTS, CCTS_OFLOW, CTS },
{ CRTSCTS, CRTS_IFLOW, RTS },
{ (tcflag_t)-1 }
};
/* xlat bsd termios flags to dgb sys-v style */
static tcflag_t
dgbflags(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;
}
#ifdef DGB_DEBUG
static int dgbdebug=0;
SYSCTL_INT(_debug, OID_AUTO, dgb_debug, CTLFLAG_RW, &dgbdebug, 0, "");
#endif
static __inline int setwin __P((struct dgb_softc *sc, unsigned addr));
static __inline int setinitwin __P((struct dgb_softc *sc, unsigned addr));
static __inline void hidewin __P((struct dgb_softc *sc));
static __inline void towin __P((struct dgb_softc *sc, int win));
/*Helg: to allow recursive dgb...() 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 dgb_softc *sc;
unsigned int addr;
{
if(sc->type==PCXEVE) {
outb(bmws.port=sc->port+1, bmws.data=FEPWIN|(addr>>13));
DPRINT3(DB_WIN,"dgb%d: switched to window 0x%x\n",sc->unit,addr>>13);
return (addr & 0x1FFF);
} else {
outb(bmws.port=sc->port,bmws.data=FEPMEM);
return addr;
}
}
static __inline int
setinitwin(sc,addr)
struct dgb_softc *sc;
unsigned int addr;
{
if(sc->type==PCXEVE) {
outb(bmws.port=sc->port+1, bmws.data=FEPWIN|(addr>>13));
DPRINT3(DB_WIN,"dgb%d: switched to window 0x%x\n",sc->unit,addr>>13);
return (addr & 0x1FFF);
} else {
outb(bmws.port=sc->port,bmws.data=inb(sc->port)|FEPMEM);
return addr;
}
}
static __inline void
hidewin(sc)
struct dgb_softc *sc;
{
bmws.data=0;
if(sc->type==PCXEVE)
outb(bmws.port=sc->port+1, bmws.data);
else
outb(bmws.port=sc->port, bmws.data);
}
static __inline void
towin(sc,win)
struct dgb_softc *sc;
int win;
{
if(sc->type==PCXEVE) {
outb(bmws.port=sc->port+1, bmws.data=win);
} else {
outb(bmws.port=sc->port,bmws.data=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=((intptr_t)(void *)dev->id_maddr & 0xFFFFFF);
DPRINT4(DB_INFO,"dgb%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,"dgb%d: got reset after %d us\n",unit,i);
break;
}
}
if(sc->status!=ENABLED) {
DPRINT2(DB_EXCEPT,"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%lx truncated to 0x%lx\n",
dev->id_unit, sc->pmem,
sc->pmem & 0xFFE000);
dev->id_maddr= (u_char *)(void *)(intptr_t)( 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 */
hidewin(sc); /* Helg: to set initial bmws state */
return 4; /* we need I/O space of 4 ports */
}
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;
volatile struct board_chan *bc;
struct global_data *gd;
int shrinkmem;
int nfails;
ushort *pstat;
int lowwater;
static int nports=0;
#ifdef DEVFS
char suffix;
#endif
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,"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(DB_INFO,"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 */
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(DB_INFO,"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(DB_INFO,"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(DB_EXCEPT,"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(DB_INFO,"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(DB_EXCEPT,"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(DB_EXCEPT,"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(DB_INFO,"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(DB_EXCEPT,"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(DB_INFO,"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(DB_EXCEPT,"dgb%d: code=0x%x must be 0\n", unit,
*(ushort *)(mem+addr));
sc->status=DISABLED;
hidewin(sc);
return 0;
}
}
DPRINT2(DB_INFO,"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(DB_INFO,"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=(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;
if(sc->altpin) {
port->dsr=CD;
port->dcd=DSR;
} else {
port->dcd=CD;
port->dsr=DSR;
}
port->pnum=i;
if(shrinkmem) {
DPRINT2(DB_INFO,"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);
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 = dgbdefaultrate;
port->it_out = port->it_in;
#ifdef DEVFS
/* MAX_DGB_PORTS is 32 => [0-9a-v] */
suffix = i < 10 ? '0' + i : 'a' + i - 10;
port->devfs_token.tty =
devfs_add_devswf(&dgb_cdevsw, (unit*32)+i,
DV_CHR, UID_ROOT, GID_WHEEL, 0600,
"ttyD%d%c", unit, suffix);
port->devfs_token.ttyi =
devfs_add_devswf(&dgb_cdevsw, (unit*32)+i+32,
DV_CHR, UID_ROOT, GID_WHEEL, 0600,
"ttyiD%d%c", unit, suffix);
port->devfs_token.ttyl =
devfs_add_devswf(&dgb_cdevsw, (unit*32)+i+64,
DV_CHR, UID_ROOT, GID_WHEEL, 0600,
"ttylD%d%c", unit, suffix);
port->devfs_token.cua =
devfs_add_devswf(&dgb_cdevsw, (unit*32)+i+128,
DV_CHR, UID_UUCP, GID_DIALER, 0660,
"cuaD%d%c", unit, suffix);
port->devfs_token.cuai =
devfs_add_devswf(&dgb_cdevsw, (unit*32)+i+160,
DV_CHR, UID_UUCP, GID_DIALER, 0660,
"cuaiD%d%c", unit, suffix);
port->devfs_token.cual =
devfs_add_devswf(&dgb_cdevsw, (unit*32)+i+192,
DV_CHR, UID_UUCP, GID_DIALER, 0660,
"cualD%d%c", unit, suffix);
#endif
}
hidewin(sc);
/* register the polling function */
timeout(dgbpoll, (void *)unit, hz/POLLSPERSEC);
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,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 >= NDGB) {
DPRINT2(DB_EXCEPT,"dgb%d: try to open a nonexisting card\n",unit);
return ENXIO;
}
sc=&dgb_softc[unit];
if(sc->status!=ENABLED) {
DPRINT2(DB_EXCEPT,"dgb%d: try to open a disabled card\n",unit);
return ENXIO;
}
if(pnum>=sc->numports) {
DPRINT3(DB_EXCEPT,"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(DB_OPEN,"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(DB_OPEN,"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(DB_OPEN,"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(DB_OPEN,"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;
cs=splclock();
setwin(sc,0);
port->imodem=bc->mstat;
bc->rout=bc->rin; /* clear input queue */
bc->idata=1;
#ifdef PRINT_BUFSIZE
printf("dgb buffers tx=%x:%x rx=%x:%x\n",bc->tseg,bc->tmax,bc->rseg,bc->rmax);
#endif
hidewin(sc);
splx(cs);
port->wopeners++;
error=dgbparam(tp, &tp->t_termios);
port->wopeners--;
if(error!=0) {
DPRINT4(DB_OPEN,"dgb%d: port%d: dgbparam 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,"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);
disc_optim(tp,&tp->t_termios);
DPRINT4(DB_OPEN,"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
*/
out:
disc_optim(tp,&tp->t_termios);
splx(s);
if( !(tp->t_state & TS_ISOPEN) && port->wopeners==0 )
dgbhardclose(port);
DPRINT4(DB_OPEN,"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);
if(mynor & CONTROL_MASK)
return 0;
unit=MINOR_TO_UNIT(mynor);
pnum=MINOR_TO_PORT(mynor);
sc=&dgb_softc[unit];
tp=&sc->ttys[pnum];
port=sc->ports+pnum;
DPRINT3(DB_CLOSE,"dgb%d: port%d: closing\n",unit,pnum);
DPRINT3(DB_CLOSE,"dgb%d: port%d: draining port\n",unit,pnum);
dgb_drain_or_flush(port);
s=spltty();
port->closing=1;
DPRINT3(DB_CLOSE,"dgb%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,"dgb%d: port%d: hard closing\n",unit,pnum);
dgbhardclose(port);
DPRINT3(DB_CLOSE,"dgb%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,"dgb%d: port%d: closed\n",unit,pnum);
wakeup(TSA_CARR_ON(tp));
wakeup(&port->active_out);
port->active_out=0;
DPRINT3(DB_CLOSE,"dgb%d: port%d: close exit\n",unit,pnum);
return 0;
}
static void
dgbhardclose(port)
struct dgb_p *port;
{
struct dgb_softc *sc=&dgb_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(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(DB_RD,"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(DB_WR,"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;
volatile struct board_chan *bc;
struct tty *tp;
int rhead, rtail;
int whead, wtail;
int size;
int c=0;
u_char *ptr;
int ocount;
int ibuf_full,obuf_full;
BoardMemWinState ws=bmws_get();
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! 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("dgb%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("dgb%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,"dgb%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("dgb%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,"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;
/* 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,"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) {
if((tp->t_state & TS_ISOPEN) && (tp->t_iflag & IGNBRK)) {
DPRINT3(DB_BREAK,"dgb%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,"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;
} 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,"dgb: 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);
}
}
end_of_buffer: ;
}
bc->idata=1; /* require event on incoming data */
} else {
bc=port->brdchan;
DPRINT4(DB_EXCEPT,"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;
bmws_set(ws);
timeout(dgbpoll, unit_c, hz/POLLSPERSEC);
}
static int
dgbioctl(dev, cmd, data, flag, p)
dev_t dev;
u_long 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;
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=&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 defined(COMPAT_43) || defined(COMPAT_SUNOS)
term = tp->t_termios;
if (cmd == TIOCSETA || cmd == TIOCSETAW || cmd == TIOCSETAF) {
DPRINT6(DB_PARAM,"dgb%d: port%d: dgbioctl-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,"dgb%d: port%d: dgbioctl-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,"dgb%d: port%d: dgbioctl-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=dgbdrain(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,"dgb%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,"dgb%d: port%d: DTR is off\n",unit,pnum);
}
hidewin(sc);
splx(cs);
break;
case TIOCCDTR:
DPRINT3(DB_MODEM,"dgb%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,"dgb%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,"dgb%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->p_ucred, &p->p_acflag);
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 dgb_p *port=p;
wakeup(&port->draining);
}
/* wait for the output to drain */
static int
dgbdrain(port)
struct dgb_p *port;
{
struct dgb_softc *sc=&dgb_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,"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(DB_WR,"dgb%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,"dgb%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
dgb_drain_or_flush(port)
struct dgb_p *port;
{
struct tty *tp=port->tty;
struct dgb_softc *sc=&dgb_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,"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(DB_WR,"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;
}
hidewin(sc);
DPRINT5(DB_WR,"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];
volatile struct board_chan *bc=port->brdchan;
int cflag;
int head;
int mval;
int iflag;
int hflow;
int s,cs;
BoardMemWinState ws=bmws_get();
DPRINT6(DB_PARAM,"dgb%d: port%d: dgbparm 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,"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 */) {
DPRINT4(DB_PARAM,"dgb%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,"dgb%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 |= dgbflags(dgb_cflags, t->c_cflag);
if(cflag!=port->fepcflag) {
port->fepcflag=cflag;
DPRINT5(DB_PARAM,"dgb%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=dgbflags(dgb_iflags, t->c_iflag);
if(iflag!=port->fepiflag) {
port->fepiflag=iflag;
DPRINT5(DB_PARAM,"dgb%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=dgbflags(dgb_flow, t->c_cflag);
if(hflow!=port->hflow) {
port->hflow=hflow;
DPRINT5(DB_PARAM,"dgb%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,"dgb%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,"dgb%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
dgbstart(tp)
struct tty *tp;
{
int unit;
int pnum;
struct dgb_p *port;
struct dgb_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=&dgb_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,"dgb%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,"dgb%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
dgbstop(tp, rw)
struct tty *tp;
int rw;
{
int unit;
int pnum;
struct dgb_p *port;
struct dgb_softc *sc;
volatile struct board_chan *bc;
int head;
int s;
BoardMemWinState ws=bmws_get();
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;
DPRINT3(DB_WR,"dgb%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);
dgbstart(tp);
}
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;
unsigned 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: 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("dgb%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,"dgb%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("dgb%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;
}
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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