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freebsd/sys/dev/si/si.c
Peter Wemm 17b944a6a7 When writing the settings for stop bits and output hardware flow control, 
things tend to work better if you write the settings to the correct
register.. (*blush*).  This subtle bug has been haunting me for ages, and
will solve a few problems that have been reported to me.

Also, take a shot at fixing the serial BREAK processing, what was there
before never really worked.  (There is a PR on this I think)
1996-06-21 21:35:01 +00:00

2399 lines
55 KiB
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/*
* Device driver for Specialix range (SI/XIO) of serial line multiplexors.
*
* Copyright (C) 1990, 1992 Specialix International,
* Copyright (C) 1993, Andy Rutter <andy@acronym.co.uk>
* Copyright (C) 1995, Peter Wemm <peter@haywire.dialix.com>
*
* Originally derived from: SunOS 4.x version
* Ported from BSDI version to FreeBSD by Peter Wemm.
*
* Redistribution and use in source and binary forms, with or without
* modification, are permitted provided that the following conditions
* are met:
* 1. Redistributions of source code must retain the above copyright
* notices, this list of conditions and the following disclaimer.
* 2. Redistributions in binary form must reproduce the above copyright
* notices, this list of conditions and the following disclaimer in the
* documentation and/or other materials provided with the distribution.
* 3. All advertising materials mentioning features or use of this software
* must display the following acknowledgement:
* This product includes software developed by Andy Rutter of
* Advanced Methods and Tools Ltd. based on original information
* from Specialix International.
* 4. Neither the name of Advanced Methods and Tools, nor Specialix
* International may be used to endorse or promote products derived from
* this software without specific prior written permission.
*
* THIS SOFTWARE IS PROVIDED BY ``AS IS'' AND ANY EXPRESS OR IMPLIED
* WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED WARRANTIES OF
* MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE DISCLAIMED. IN
* NO EVENT SHALL THE AUTHORS BE LIABLE.
*
* $Id: si.c,v 1.45 1996/06/17 18:52:53 peter Exp $
*/
#ifndef lint
static const char si_copyright1[] = "@(#) (C) Specialix International, 1990,1992",
si_copyright2[] = "@(#) (C) Andy Rutter 1993",
si_copyright3[] = "@(#) (C) Peter Wemm 1995";
#endif /* not lint */
#include <sys/param.h>
#include <sys/systm.h>
#include <sys/ioctl.h>
#include <sys/tty.h>
#include <sys/ttydefaults.h>
#include <sys/proc.h>
#include <sys/conf.h>
#include <sys/file.h>
#include <sys/uio.h>
#include <sys/dkstat.h>
#include <sys/kernel.h>
#include <sys/syslog.h>
#include <sys/malloc.h>
#include <sys/sysctl.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/icu.h>
#include <i386/isa/isa.h>
#include <i386/isa/isa_device.h>
#include <i386/isa/sireg.h>
#include <machine/si.h>
#include <machine/stdarg.h>
#include "si.h"
/*
* This device driver is designed to interface the Specialix International
* range of serial multiplexor cards (SI/XIO) to BSDI/386 on an ISA bus machine.
*
* The controller is interfaced to the host via dual port ram
* and a (programmable - SIHOST2) interrupt at IRQ 11,12 or 15.
*/
#define POLL /* turn on poller to generate buffer empty interrupt */
#define SI_DEF_HWFLOW /* turn on default CRTSCTS flow control */
#define SI_I_HIGH_WATER (TTYHOG - 2 * SI_BUFFERSIZE)
#define INT_COUNT 25000 /* max of 125 ints per second */
#define RXINT_COUNT 1 /* one rxint per 10 milliseconds */
enum si_mctl { GET, SET, BIS, BIC };
static void si_command __P((struct si_port *, int, int));
static int si_modem __P((struct si_port *, enum si_mctl, int));
static void si_write_enable __P((struct si_port *, int));
static int si_Sioctl __P((dev_t, int, caddr_t, int, struct proc *));
static void si_start __P((struct tty *));
static void si_lstart __P((struct si_port *));
static void si_disc_optim __P((struct tty *tp, struct termios *t,
struct si_port *pp));
static void sihardclose __P((struct si_port *pp));
static void sidtrwakeup __P((void *chan));
static int siparam __P((struct tty *, struct termios *));
static void si_registerdev __P((struct isa_device *id));
static int siprobe __P((struct isa_device *id));
static int siattach __P((struct isa_device *id));
static void si_modem_state __P((struct si_port *pp, struct tty *tp, int hi_ip));
struct isa_driver sidriver =
{ siprobe, siattach, "si" };
static d_open_t siopen;
static d_close_t siclose;
static d_read_t siread;
static d_write_t siwrite;
static d_ioctl_t siioctl;
static d_stop_t sistop;
static d_devtotty_t sidevtotty;
#define CDEV_MAJOR 68
static struct cdevsw si_cdevsw =
{ siopen, siclose, siread, siwrite, /*68*/
siioctl, sistop, noreset, sidevtotty,/* si */
ttselect, nommap, NULL, "si", NULL, -1 };
#ifdef SI_DEBUG /* use: ``options "SI_DEBUG"'' in your config file */
static void si_dprintf __P((struct si_port *pp, int flags, const char *fmt,
...));
static char *si_mctl2str __P((enum si_mctl cmd));
#define DPRINT(x) si_dprintf x
#else
#define DPRINT(x) /* void */
#endif
static int si_Nports;
static int si_Nmodules;
static int si_debug = 0; /* data, not bss, so it's patchable */
static struct tty *si_tty;
/* where the firmware lives; defined in si_code.c */
extern int si_dsize;
extern unsigned char si_download[];
struct si_softc {
int sc_type; /* adapter type */
char *sc_typename; /* adapter type string */
struct si_port *sc_ports; /* port structures for this card */
caddr_t sc_paddr; /* physical addr of iomem */
caddr_t sc_maddr; /* kvaddr of iomem */
int sc_nport; /* # ports on this card */
int sc_irq; /* copy of attach irq */
int sc_eisa_iobase; /* EISA io port address */
int sc_eisa_irqbits;
struct kern_devconf sc_kdc;
#ifdef DEVFS
struct {
void *ttyd;
void *cuaa;
void *ttyl;
void *ttyi;
} devfs_token[32]; /* what is the max per card? */
void *control_token;
#endif
};
static struct si_softc si_softc[NSI]; /* up to 4 elements */
#ifndef B2000 /* not standard, but the hardware knows it. */
# define B2000 2000
#endif
static struct speedtab bdrates[] = {
B75, CLK75, /* 0x0 */
B110, CLK110, /* 0x1 */
B150, CLK150, /* 0x3 */
B300, CLK300, /* 0x4 */
B600, CLK600, /* 0x5 */
B1200, CLK1200, /* 0x6 */
B2000, CLK2000, /* 0x7 */
B2400, CLK2400, /* 0x8 */
B4800, CLK4800, /* 0x9 */
B9600, CLK9600, /* 0xb */
B19200, CLK19200, /* 0xc */
B38400, CLK38400, /* 0x2 (out of order!) */
B57600, CLK57600, /* 0xd */
B115200, CLK110, /* 0x1 (dupe!, 110 baud on "si") */
-1, -1
};
/* populated with approx character/sec rates - translated at card
* initialisation time to chars per tick of the clock */
static int done_chartimes = 0;
static struct speedtab chartimes[] = {
B75, 8,
B110, 11,
B150, 15,
B300, 30,
B600, 60,
B1200, 120,
B2000, 200,
B2400, 240,
B4800, 480,
B9600, 960,
B19200, 1920,
B38400, 3840,
B57600, 5760,
B115200, 11520,
-1, -1
};
static volatile int in_intr = 0; /* Inside interrupt handler? */
static int si_default_rate = TTYDEF_SPEED;
static int si_default_iflag = 0;
static int si_default_oflag = 0;
static int si_default_lflag = 0;
#ifdef SI_DEF_HWFLOW
static int si_default_cflag = TTYDEF_CFLAG | CRTSCTS;
#else
static int si_default_cflag = TTYDEF_CFLAG;
#endif
#ifdef POLL
static int si_pollrate; /* in addition to irq */
SYSCTL_INT(_machdep, OID_AUTO, si_pollrate, CTLFLAG_RW, &si_pollrate, 0, "");
static int init_finished = 0;
static void si_poll __P((void *));
#endif
/*
* Array of adapter types and the corresponding RAM size. The order of
* entries here MUST match the ordinal of the adapter type.
*/
static char *si_type[] = {
"EMPTY",
"SIHOST",
"SI2", /* MCA */
"SIHOST2",
"SIEISA",
};
static struct kern_devconf si_kdc[NSI] = { {
0, 0, 0, /* filled in by dev_attach */
"si", 0, { MDDT_ISA, 0, "tty" },
isa_generic_externalize, 0, 0, ISA_EXTERNALLEN,
&kdc_isa0, /* parent */
0, /* parent data */
DC_UNCONFIGURED, /* state */
"Specialix SI/XIO Host adapter",
DC_CLS_SERIAL, /* class */
} };
static void
si_registerdev(id)
struct isa_device *id;
{
if (id->id_unit != 0) {
bcopy(&si_kdc[0], &si_kdc[id->id_unit], sizeof(si_kdc[0]));
}
si_kdc[id->id_unit].kdc_unit = id->id_unit;
si_kdc[id->id_unit].kdc_isa = id;
si_kdc[id->id_unit].kdc_state = DC_UNCONFIGURED;
dev_attach(&si_kdc[id->id_unit]);
}
/* Look for a valid board at the given mem addr */
static int
siprobe(id)
struct isa_device *id;
{
struct si_softc *sc;
int type;
u_int i, ramsize;
volatile BYTE was, *ux;
volatile unsigned char *maddr;
unsigned char *paddr;
si_registerdev(id);
si_pollrate = (hz / 10); /* 10 per second */
maddr = id->id_maddr; /* virtual address... */
paddr = (caddr_t)vtophys(id->id_maddr); /* physical address... */
DPRINT((0, DBG_AUTOBOOT, "si%d: probe at virtual=0x%x physical=0x%x\n",
id->id_unit, id->id_maddr, paddr));
/*
* this is a lie, but it's easier than trying to handle caching
* and ram conflicts in the >1M and <16M region.
*/
if ((caddr_t)paddr < (caddr_t)IOM_BEGIN ||
(caddr_t)paddr >= (caddr_t)IOM_END) {
printf("si%d: iomem (%lx) out of range\n",
id->id_unit, (long)paddr);
return(0);
}
if (id->id_unit >= NSI) {
/* THIS IS IMPOSSIBLE */
return(0);
}
if (((u_int)paddr & 0x7fff) != 0) {
DPRINT((0, DBG_AUTOBOOT|DBG_FAIL,
"si%d: iomem (%x) not on 32k boundary\n",
id->id_unit, paddr));
return(0);
}
for (i=0; i < NSI; i++) {
if ((sc = &si_softc[i]) == NULL)
continue;
if ((caddr_t)sc->sc_paddr == (caddr_t)paddr) {
DPRINT((0, DBG_AUTOBOOT|DBG_FAIL,
"si%d: iomem (%x) already configured to si%d\n",
id->id_unit, sc->sc_paddr, i));
return(0);
}
}
#if NEISA > 0
if (id->id_iobase > 0x0fff) { /* EISA card */
int irq, port;
unsigned long base;
int eisa_irqs[] = { 0,IRQ1,IRQ2,IRQ3,IRQ4,IRQ5,IRQ6,IRQ7,
IRQ8,IRQ9,IRQ10,IRQ11,IRQ12,IRQ13,IRQ14,IRQ15 };
port = id->id_iobase;
base = (inb(port+1) << 24) | (inb(port) << 16);
irq = ((inb(port+2) >> 4) & 0xf);
id->id_irq = eisa_irqs[irq];
DPRINT((0, DBG_AUTOBOOT,
"si%d: EISA base %x, irq %x, id_irq %x, port %x\n",
id->id_unit, base, irq, id->id_irq, port));
if ((id->id_irq&(IRQ1|IRQ2|IRQ8|IRQ13)) != 0)
goto bad_irq;
id->id_iobase &= 0xf000;
id->id_iosize = 0x0fff;
type = EISA;
outb(p+2, (BYTE)irq << 4);
sc->sc_eisa_iobase = p;
sc->sc_eisa_irqbits = irq << 4;
ramsize = SIEISA_RAMSIZE;
goto got_card;
}
#endif
/* Is there anything out there? (0x17 is just an arbitrary number) */
*maddr = 0x17;
if (*maddr != 0x17) {
DPRINT((0, DBG_AUTOBOOT|DBG_FAIL,
"si%d: 0x17 check fail at phys 0x%x\n",
id->id_unit, paddr));
fail:
return(0);
}
/*
* OK, now to see if whatever responded is really an SI card.
* Try for a MK II first (SIHOST2)
*/
for (i=SIPLSIG; i<SIPLSIG+8; i++)
if ((*(maddr+i) & 7) != (~(BYTE)i & 7))
goto try_mk1;
/* It must be an SIHOST2 */
*(maddr + SIPLRESET) = 0;
*(maddr + SIPLIRQCLR) = 0;
*(maddr + SIPLIRQSET) = 0x10;
type = SIHOST2;
ramsize = SIHOST2_RAMSIZE;
goto got_card;
/*
* Its not a MK II, so try for a MK I (SIHOST)
*/
try_mk1:
*(maddr+SIRESET) = 0x0; /* reset the card */
*(maddr+SIINTCL) = 0x0; /* clear int */
*(maddr+SIRAM) = 0x17;
if (*(maddr+SIRAM) != (BYTE)0x17)
goto fail;
*(maddr+0x7ff8) = 0x17;
if (*(maddr+0x7ff8) != (BYTE)0x17) {
DPRINT((0, DBG_AUTOBOOT|DBG_FAIL,
"si%d: 0x17 check fail at phys 0x%x = 0x%x\n",
id->id_unit, paddr+0x77f8, *(maddr+0x77f8)));
goto fail;
}
/* It must be an SIHOST (maybe?) - there must be a better way XXXX */
type = SIHOST;
ramsize = SIHOST_RAMSIZE;
got_card:
DPRINT((0, DBG_AUTOBOOT, "si%d: found type %d card, try memory test\n",
id->id_unit, type));
/* Try the acid test */
ux = (BYTE *)(maddr + SIRAM);
for (i=0; i<ramsize; i++, ux++)
*ux = (BYTE)(i&0xff);
ux = (BYTE *)(maddr + SIRAM);
for (i=0; i<ramsize; i++, ux++) {
if ((was = *ux) != (BYTE)(i&0xff)) {
DPRINT((0, DBG_AUTOBOOT|DBG_FAIL,
"si%d: match fail at phys 0x%x, was %x should be %x\n",
id->id_unit, paddr+i, was, i&0xff));
goto fail;
}
}
/* clear out the RAM */
ux = (BYTE *)(maddr + SIRAM);
for (i=0; i<ramsize; i++)
*ux++ = 0;
ux = (BYTE *)(maddr + SIRAM);
for (i=0; i<ramsize; i++) {
if ((was = *ux++) != 0) {
DPRINT((0, DBG_AUTOBOOT|DBG_FAIL,
"si%d: clear fail at phys 0x%x, was %x\n",
id->id_unit, paddr+i, was));
goto fail;
}
}
/*
* Success, we've found a valid board, now fill in
* the adapter structure.
*/
switch (type) {
case SIHOST2:
if ((id->id_irq&(IRQ11|IRQ12|IRQ15)) == 0) {
bad_irq:
DPRINT((0, DBG_AUTOBOOT|DBG_FAIL,
"si%d: bad IRQ value - %d\n",
id->id_unit, id->id_irq));
return(0);
}
id->id_msize = SIHOST2_MEMSIZE;
break;
case SIHOST:
if ((id->id_irq&(IRQ11|IRQ12|IRQ15)) == 0) {
goto bad_irq;
}
id->id_msize = SIHOST_MEMSIZE;
break;
case SIEISA:
id->id_msize = SIEISA_MEMSIZE;
break;
case SI2: /* MCA */
default:
printf("si%d: %s not supported\n", id->id_unit, si_type[type]);
return(0);
}
si_softc[id->id_unit].sc_type = type;
si_softc[id->id_unit].sc_typename = si_type[type];
return(-1); /* -1 == found */
}
/*
* Attach the device. Initialize the card.
*/
static int
siattach(id)
struct isa_device *id;
{
int unit = id->id_unit;
struct si_softc *sc = &si_softc[unit];
struct si_port *pp;
volatile struct si_channel *ccbp;
volatile struct si_reg *regp;
volatile caddr_t maddr;
struct si_module *modp;
struct tty *tp;
struct speedtab *spt;
int nmodule, nport, x, y;
int uart_type;
DPRINT((0, DBG_AUTOBOOT, "si%d: siattach\n", id->id_unit));
sc->sc_paddr = (caddr_t)vtophys(id->id_maddr);
sc->sc_maddr = id->id_maddr;
sc->sc_irq = id->id_irq;
sc->sc_ports = NULL; /* mark as uninitialised */
maddr = sc->sc_maddr;
/*
* OK, now lets download the firmware and try and boot the CPU..
*/
DPRINT((0, DBG_DOWNLOAD, "si%d: si_download: nbytes %d\n",
id->id_unit, si_dsize));
bcopy(si_download, maddr, si_dsize);
switch (sc->sc_type) {
case SIEISA:
#if NEISA > 0
/* modify the Z280 firmware to tell it that it's on an EISA */
*(maddr+0x42) = 1;
outb(sc->sc_eisa_iobase+2, sc->sc_eisa_irqbits | 4);
(void)inb(sc->sc_eisa_iobase+3); /* reset interrupt */
break;
#endif /* fall-through if not EISA */
case SI2:
/*
* must get around to converting the code for
* these one day, if FreeBSD ever supports it.
*/
return 0;
case SIHOST:
*(maddr+SIRESET_CL) = 0;
*(maddr+SIINTCL_CL) = 0;
break;
case SIHOST2:
*(maddr+SIPLRESET) = 0x10;
switch (sc->sc_irq) {
case IRQ11:
*(maddr+SIPLIRQ11) = 0x10;
break;
case IRQ12:
*(maddr+SIPLIRQ12) = 0x10;
break;
case IRQ15:
*(maddr+SIPLIRQ15) = 0x10;
break;
}
*(maddr+SIPLIRQCLR) = 0x10;
break;
}
DELAY(1000000); /* wait around for a second */
regp = (struct si_reg *)maddr;
y = 0;
/* wait max of 5 sec for init OK */
while (regp->initstat == 0 && y++ < 10) {
DELAY(500000);
}
switch (regp->initstat) {
case 0:
printf("si%d: startup timeout - aborting\n", unit);
sc->sc_type = SIEMPTY;
return 0;
case 1:
/* set throttle to 125 intr per second */
regp->int_count = INT_COUNT;
/* rx intr max of 25 timer per second */
regp->rx_int_count = RXINT_COUNT;
regp->int_pending = 0; /* no intr pending */
regp->int_scounter = 0; /* reset counter */
break;
case 0xff:
/*
* No modules found, so give up on this one.
*/
printf("si%d: %s - no ports found\n", unit,
si_type[sc->sc_type]);
return 0;
default:
printf("si%d: Z280 version error - initstat %x\n",
unit, regp->initstat);
return 0;
}
/*
* First time around the ports just count them in order
* to allocate some memory.
*/
nport = 0;
modp = (struct si_module *)(maddr + 0x80);
for (;;) {
DPRINT((0, DBG_DOWNLOAD, "si%d: ccb addr 0x%x\n", unit, modp));
switch (modp->sm_type & (~MMASK)) {
case M232:
case M422:
DPRINT((0, DBG_DOWNLOAD,
"si%d: Found 232/422 module, %d ports\n",
unit, (int)(modp->sm_type & MMASK)));
/* this is a firmware issue */
if (si_Nports == SI_MAXPORTPERCARD) {
printf("si%d: extra ports ignored\n", unit);
continue;
}
x = modp->sm_type & MMASK;
nport += x;
si_Nports += x;
si_Nmodules++;
break;
default:
printf("si%d: unknown module type %d\n",
unit, modp->sm_type);
break;
}
if (modp->sm_next == 0)
break;
modp = (struct si_module *)
(maddr + (unsigned)(modp->sm_next & 0x7fff));
}
sc->sc_ports = (struct si_port *)malloc(sizeof(struct si_port) * nport,
M_DEVBUF, M_NOWAIT);
if (sc->sc_ports == 0) {
mem_fail:
printf("si%d: fail to malloc memory for port structs\n",
unit);
return 0;
}
bzero(sc->sc_ports, sizeof(struct si_port) * nport);
sc->sc_nport = nport;
/*
* allocate tty structures for ports
*/
tp = (struct tty *)malloc(sizeof(*tp) * nport, M_DEVBUF, M_NOWAIT);
if (tp == 0)
goto mem_fail;
bzero(tp, sizeof(*tp) * nport);
si_tty = tp;
/* mark the device state as attached */
si_kdc[unit].kdc_state = DC_BUSY;
/*
* Scan round the ports again, this time initialising.
*/
pp = sc->sc_ports;
nmodule = 0;
modp = (struct si_module *)(maddr + 0x80);
uart_type = 0;
for (;;) {
switch (modp->sm_type & (~MMASK)) {
case M232:
case M422:
nmodule++;
nport = (modp->sm_type & MMASK);
ccbp = (struct si_channel *)((char *)modp+0x100);
if (uart_type == 0)
uart_type = ccbp->type;
for (x = 0; x < nport; x++, pp++, ccbp++) {
pp->sp_ccb = ccbp; /* save the address */
pp->sp_tty = tp++;
pp->sp_pend = IDLE_CLOSE;
pp->sp_state = 0; /* internal flag */
pp->sp_dtr_wait = 3 * hz;
pp->sp_iin.c_iflag = si_default_iflag;
pp->sp_iin.c_oflag = si_default_oflag;
pp->sp_iin.c_cflag = si_default_cflag;
pp->sp_iin.c_lflag = si_default_lflag;
termioschars(&pp->sp_iin);
pp->sp_iin.c_ispeed = pp->sp_iin.c_ospeed =
si_default_rate;
pp->sp_iout = pp->sp_iin;
}
break;
default:
break;
}
if (modp->sm_next == 0) {
printf("si%d: card: %s, ports: %d, modules: %d (type: %d)\n",
unit,
sc->sc_typename,
sc->sc_nport,
nmodule,
uart_type);
break;
}
modp = (struct si_module *)
(maddr + (unsigned)(modp->sm_next & 0x7fff));
}
if (done_chartimes == 0) {
for (spt = chartimes ; spt->sp_speed != -1; spt++) {
if ((spt->sp_code /= hz) == 0)
spt->sp_code = 1;
}
done_chartimes = 1;
}
#ifdef DEVFS
/* path name devsw minor type uid gid perm*/
for ( x = 0; x < sc->sc_nport; x++ ) {
y = x + 1; /* For sync with the manuals that start at 1 */
sc->devfs_token[x].ttyd = devfs_add_devswf(
&si_cdevsw, x,
DV_CHR, 0, 0, 0600, "ttyA%02d", y);
sc->devfs_token[x].cuaa = devfs_add_devswf(
&si_cdevsw, x + 128,
DV_CHR, 0, 0, 0600, "cuaA%02d", y);
sc->devfs_token[x].ttyi = devfs_add_devswf(
&si_cdevsw, x + 0x10000,
DV_CHR, 0, 0, 0600, "ttyiA%02d", y);
sc->devfs_token[x].ttyl = devfs_add_devswf(
&si_cdevsw, x + 0x20000,
DV_CHR, 0, 0, 0600, "ttylA%02d", y);
}
sc->control_token =
devfs_add_devswf(&si_cdevsw, 0x40000, DV_CHR, 0, 0, 0600,
"si_control");
#endif
return (1);
}
static int
siopen(dev, flag, mode, p)
dev_t dev;
int flag, mode;
struct proc *p;
{
int oldspl, error;
int card, port;
register struct si_softc *sc;
register struct tty *tp;
volatile struct si_channel *ccbp;
struct si_port *pp;
int mynor = minor(dev);
/* quickly let in /dev/si_control */
if (IS_CONTROLDEV(mynor)) {
if (error = suser(p->p_ucred, &p->p_acflag))
return(error);
return(0);
}
card = SI_CARD(mynor);
if (card >= NSI)
return (ENXIO);
sc = &si_softc[card];
if (sc->sc_type == SIEMPTY) {
DPRINT((0, DBG_OPEN|DBG_FAIL, "si%d: type %s??\n",
card, sc->sc_typename));
return(ENXIO);
}
port = SI_PORT(mynor);
if (port >= sc->sc_nport) {
DPRINT((0, DBG_OPEN|DBG_FAIL, "si%d: nports %d\n",
card, sc->sc_nport));
return(ENXIO);
}
#ifdef POLL
/*
* We've now got a device, so start the poller.
*/
if (init_finished == 0) {
timeout(si_poll, (caddr_t)0L, si_pollrate);
init_finished = 1;
}
#endif
/* initial/lock device */
if (IS_STATE(mynor)) {
return(0);
}
pp = sc->sc_ports + port;
tp = pp->sp_tty; /* the "real" tty */
ccbp = pp->sp_ccb; /* Find control block */
DPRINT((pp, DBG_ENTRY|DBG_OPEN, "siopen(%x,%x,%x,%x)\n",
dev, flag, mode, p));
oldspl = spltty(); /* Keep others out */
error = 0;
open_top:
while (pp->sp_state & SS_DTR_OFF) {
error = tsleep(&pp->sp_dtr_wait, TTIPRI|PCATCH, "sidtr", 0);
if (error != 0)
goto out;
}
if (tp->t_state & TS_ISOPEN) {
/*
* The device is open, so everything has been initialised.
* handle conflicts.
*/
if (IS_CALLOUT(mynor)) {
if (!pp->sp_active_out) {
error = EBUSY;
goto out;
}
} else {
if (pp->sp_active_out) {
if (flag & O_NONBLOCK) {
error = EBUSY;
goto out;
}
error = tsleep(&pp->sp_active_out,
TTIPRI|PCATCH, "sibi", 0);
if (error != 0)
goto out;
goto open_top;
}
}
if (tp->t_state & TS_XCLUDE && p->p_ucred->cr_uid != 0) {
DPRINT((pp, DBG_OPEN|DBG_FAIL,
"already open and EXCLUSIVE set\n"));
error = EBUSY;
goto out;
}
} else {
/*
* The device isn't open, so there are no conflicts.
* Initialize it. Avoid sleep... :-)
*/
DPRINT((pp, DBG_OPEN, "first open\n"));
tp->t_oproc = si_start;
tp->t_param = siparam;
tp->t_dev = dev;
tp->t_termios = mynor & SI_CALLOUT_MASK
? pp->sp_iout : pp->sp_iin;
(void) si_modem(pp, SET, TIOCM_DTR|TIOCM_RTS);
++pp->sp_wopeners; /* in case of sleep in siparam */
error = siparam(tp, &tp->t_termios);
--pp->sp_wopeners;
if (error != 0)
goto out;
/* XXX: we should goto_top if siparam slept */
ttsetwater(tp);
/* set initial DCD state */
pp->sp_last_hi_ip = ccbp->hi_ip;
if ((pp->sp_last_hi_ip & IP_DCD) || IS_CALLOUT(mynor)) {
(*linesw[tp->t_line].l_modem)(tp, 1);
}
}
/* whoops! we beat the close! */
if (pp->sp_state & SS_CLOSING) {
/* try and stop it from proceeding to bash the hardware */
pp->sp_state &= ~SS_CLOSING;
}
/*
* Wait for DCD if necessary
*/
if (!(tp->t_state & TS_CARR_ON)
&& !IS_CALLOUT(mynor)
&& !(tp->t_cflag & CLOCAL)
&& !(flag & O_NONBLOCK)) {
++pp->sp_wopeners;
DPRINT((pp, DBG_OPEN, "sleeping for carrier\n"));
error = tsleep(TSA_CARR_ON(tp), TTIPRI|PCATCH, "sidcd", 0);
--pp->sp_wopeners;
if (error != 0)
goto out;
goto open_top;
}
error = (*linesw[tp->t_line].l_open)(dev, tp);
si_disc_optim(tp, &tp->t_termios, pp);
if (tp->t_state & TS_ISOPEN && IS_CALLOUT(mynor))
pp->sp_active_out = TRUE;
pp->sp_state |= SS_OPEN; /* made it! */
out:
splx(oldspl);
DPRINT((pp, DBG_OPEN, "leaving siopen\n"));
if (!(tp->t_state & TS_ISOPEN) && pp->sp_wopeners == 0)
sihardclose(pp);
return(error);
}
static int
siclose(dev, flag, mode, p)
dev_t dev;
int flag, mode;
struct proc *p;
{
register struct si_port *pp;
register struct tty *tp;
int oldspl;
int error = 0;
int mynor = minor(dev);
if (IS_SPECIAL(mynor))
return(0);
oldspl = spltty();
pp = MINOR2PP(mynor);
tp = pp->sp_tty;
DPRINT((pp, DBG_ENTRY|DBG_CLOSE, "siclose(%x,%x,%x,%x) sp_state:%x\n",
dev, flag, mode, p, pp->sp_state));
/* did we sleep and loose a race? */
if (pp->sp_state & SS_CLOSING) {
/* error = ESOMETING? */
goto out;
}
/* begin race detection.. */
pp->sp_state |= SS_CLOSING;
si_write_enable(pp, 0); /* block writes for ttywait() */
/* THIS MAY SLEEP IN TTYWAIT!!! */
(*linesw[tp->t_line].l_close)(tp, flag);
si_write_enable(pp, 1);
/* did we sleep and somebody started another open? */
if (!(pp->sp_state & SS_CLOSING)) {
/* error = ESOMETING? */
goto out;
}
/* ok. we are now still on the right track.. nuke the hardware */
if (pp->sp_state & SS_LSTART) {
untimeout((timeout_func_t)si_lstart, (caddr_t)pp);
pp->sp_state &= ~SS_LSTART;
}
sistop(tp, FREAD | FWRITE);
sihardclose(pp);
ttyclose(tp);
pp->sp_state &= ~SS_OPEN;
out:
DPRINT((pp, DBG_CLOSE|DBG_EXIT, "close done, returning\n"));
splx(oldspl);
return(error);
}
static void
sihardclose(pp)
struct si_port *pp;
{
int oldspl;
struct tty *tp;
volatile struct si_channel *ccbp;
oldspl = spltty();
tp = pp->sp_tty;
ccbp = pp->sp_ccb; /* Find control block */
if (tp->t_cflag & HUPCL
|| !pp->sp_active_out
&& !(ccbp->hi_ip & IP_DCD)
&& !(pp->sp_iin.c_cflag && CLOCAL)
|| !(tp->t_state & TS_ISOPEN)) {
(void) si_modem(pp, BIC, TIOCM_DTR|TIOCM_RTS);
(void) si_command(pp, FCLOSE, SI_NOWAIT);
if (pp->sp_dtr_wait != 0) {
timeout(sidtrwakeup, pp, pp->sp_dtr_wait);
pp->sp_state |= SS_DTR_OFF;
}
}
pp->sp_active_out = FALSE;
wakeup((caddr_t)&pp->sp_active_out);
wakeup(TSA_CARR_ON(tp));
splx(oldspl);
}
/*
* called at splsoftclock()...
*/
static void
sidtrwakeup(chan)
void *chan;
{
struct si_port *pp;
int oldspl;
oldspl = spltty();
pp = (struct si_port *)chan;
pp->sp_state &= ~SS_DTR_OFF;
wakeup(&pp->sp_dtr_wait);
splx(oldspl);
}
/*
* User level stuff - read and write
*/
static int
siread(dev, uio, flag)
register dev_t dev;
struct uio *uio;
int flag;
{
register struct tty *tp;
int mynor = minor(dev);
if (IS_SPECIAL(mynor)) {
DPRINT((0, DBG_ENTRY|DBG_FAIL|DBG_READ, "siread(CONTROLDEV!!)\n"));
return(ENODEV);
}
tp = MINOR2TP(mynor);
DPRINT((TP2PP(tp), DBG_ENTRY|DBG_READ,
"siread(%x,%x,%x)\n", dev, uio, flag));
return ((*linesw[tp->t_line].l_read)(tp, uio, flag));
}
static int
siwrite(dev, uio, flag)
dev_t dev;
struct uio *uio;
int flag;
{
register struct si_port *pp;
register struct tty *tp;
int error = 0;
int mynor = minor(dev);
int oldspl;
if (IS_SPECIAL(mynor)) {
DPRINT((0, DBG_ENTRY|DBG_FAIL|DBG_WRITE, "siwrite(CONTROLDEV!!)\n"));
return(ENODEV);
}
pp = MINOR2PP(mynor);
tp = pp->sp_tty;
DPRINT((pp, DBG_WRITE, "siwrite(%x,%x,%x)\n", dev, uio, flag));
oldspl = spltty();
/*
* If writes are currently blocked, wait on the "real" tty
*/
while (pp->sp_state & SS_BLOCKWRITE) {
pp->sp_state |= SS_WAITWRITE;
DPRINT((pp, DBG_WRITE, "in siwrite, wait for SS_BLOCKWRITE to clear\n"));
if (error = ttysleep(tp, (caddr_t)pp, TTOPRI|PCATCH,
"siwrite", 0))
goto out;
}
error = (*linesw[tp->t_line].l_write)(tp, uio, flag);
out:
splx(oldspl);
return (error);
}
static struct tty *
sidevtotty(dev_t dev)
{
struct si_port *pp;
int mynor = minor(dev);
struct si_softc *sc = &si_softc[SI_CARD(mynor)];
if (IS_SPECIAL(mynor))
return(NULL);
if (SI_PORT(mynor) >= sc->sc_nport)
return(NULL);
pp = MINOR2PP(mynor);
return (pp->sp_tty);
}
static int
siioctl(dev, cmd, data, flag, p)
dev_t dev;
int cmd;
caddr_t data;
int flag;
struct proc *p;
{
struct si_port *pp;
register struct tty *tp;
int error;
int mynor = minor(dev);
int oldspl;
int blocked = 0;
#if defined(COMPAT_43)
int oldcmd;
struct termios term;
#endif
if (IS_SI_IOCTL(cmd))
return(si_Sioctl(dev, cmd, data, flag, p));
pp = MINOR2PP(mynor);
tp = pp->sp_tty;
DPRINT((pp, DBG_ENTRY|DBG_IOCTL, "siioctl(%x,%x,%x,%x)\n",
dev, cmd, data, flag));
if (IS_STATE(mynor)) {
struct termios *ct;
switch (mynor & SI_STATE_MASK) {
case SI_INIT_STATE_MASK:
ct = IS_CALLOUT(mynor) ? &pp->sp_iout : &pp->sp_iin;
break;
case SI_LOCK_STATE_MASK:
ct = IS_CALLOUT(mynor) ? &pp->sp_iout : &pp->sp_iin;
break;
default:
return (ENODEV);
}
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);
}
}
/*
* Do the old-style ioctl compat routines...
*/
#if defined(COMPAT_43)
term = tp->t_termios;
oldcmd = cmd;
error = ttsetcompat(tp, &cmd, data, &term);
if (error != 0)
return (error);
if (cmd != oldcmd)
data = (caddr_t)&term;
#endif
/*
* Do the initial / lock state business
*/
if (cmd == TIOCSETA || cmd == TIOCSETAW || cmd == TIOCSETAF) {
int cc;
struct termios *dt = (struct termios *)data;
struct termios *lt = mynor & SI_CALLOUT_MASK
? &pp->sp_lout : &pp->sp_lin;
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;
}
/*
* Block user-level writes to give the ttywait()
* a chance to completely drain for commands
* that require the port to be in a quiescent state.
*/
switch (cmd) {
case TIOCSETAW: case TIOCSETAF:
case TIOCDRAIN: case TIOCSETP:
blocked++; /* block writes for ttywait() and siparam() */
si_write_enable(pp, 0);
}
error = (*linesw[tp->t_line].l_ioctl)(tp, cmd, data, flag, p);
if (error >= 0)
goto out;
oldspl = spltty();
error = ttioctl(tp, cmd, data, flag);
si_disc_optim(tp, &tp->t_termios, pp);
if (error >= 0)
goto outspl;
switch (cmd) {
case TIOCSBRK:
si_command(pp, SBREAK, SI_WAIT);
break;
case TIOCCBRK:
si_command(pp, EBREAK, SI_WAIT);
break;
case TIOCSDTR:
(void) si_modem(pp, SET, TIOCM_DTR|TIOCM_RTS);
break;
case TIOCCDTR:
(void) si_modem(pp, SET, 0);
break;
case TIOCMSET:
(void) si_modem(pp, SET, *(int *)data);
break;
case TIOCMBIS:
(void) si_modem(pp, BIS, *(int *)data);
break;
case TIOCMBIC:
(void) si_modem(pp, BIC, *(int *)data);
break;
case TIOCMGET:
*(int *)data = si_modem(pp, GET, 0);
break;
case TIOCMSDTRWAIT:
/* must be root since the wait applies to following logins */
error = suser(p->p_ucred, &p->p_acflag);
if (error != 0) {
goto outspl;
}
pp->sp_dtr_wait = *(int *)data * hz / 100;
break;
case TIOCMGDTRWAIT:
*(int *)data = pp->sp_dtr_wait * 100 / hz;
break;
default:
error = ENOTTY;
}
error = 0;
outspl:
splx(oldspl);
out:
DPRINT((pp, DBG_IOCTL|DBG_EXIT, "siioctl ret %d\n", error));
if (blocked)
si_write_enable(pp, 1);
return(error);
}
/*
* Handle the Specialix ioctls. All MUST be called via the CONTROL device
*/
static int
si_Sioctl(dev_t dev, int cmd, caddr_t data, int flag, struct proc *p)
{
struct si_softc *xsc;
register struct si_port *xpp;
volatile struct si_reg *regp;
struct si_tcsi *dp;
struct si_pstat *sps;
int *ip, error = 0;
int oldspl;
int card, port;
int mynor = minor(dev);
DPRINT((0, DBG_ENTRY|DBG_IOCTL, "si_Sioctl(%x,%x,%x,%x)\n",
dev, cmd, data, flag));
#if 1
DPRINT((0, DBG_IOCTL, "TCSI_PORT=%x\n", TCSI_PORT));
DPRINT((0, DBG_IOCTL, "TCSI_CCB=%x\n", TCSI_CCB));
DPRINT((0, DBG_IOCTL, "TCSI_TTY=%x\n", TCSI_TTY));
#endif
if (!IS_CONTROLDEV(mynor)) {
DPRINT((0, DBG_IOCTL|DBG_FAIL, "not called from control device!\n"));
return(ENODEV);
}
oldspl = spltty(); /* better safe than sorry */
ip = (int *)data;
#define SUCHECK if (error = suser(p->p_ucred, &p->p_acflag)) goto out
switch (cmd) {
case TCSIPORTS:
*ip = si_Nports;
goto out;
case TCSIMODULES:
*ip = si_Nmodules;
goto out;
case TCSISDBG_ALL:
SUCHECK;
si_debug = *ip;
goto out;
case TCSIGDBG_ALL:
*ip = si_debug;
goto out;
default:
/*
* Check that a controller for this port exists
*/
/* may also be a struct si_pstat, a superset of si_tcsi */
dp = (struct si_tcsi *)data;
sps = (struct si_pstat *)data;
card = dp->tc_card;
xsc = &si_softc[card]; /* check.. */
if (card < 0 || card >= NSI || xsc->sc_type == SIEMPTY) {
error = ENOENT;
goto out;
}
/*
* And check that a port exists
*/
port = dp->tc_port;
if (port < 0 || port >= xsc->sc_nport) {
error = ENOENT;
goto out;
}
xpp = xsc->sc_ports + port;
regp = (struct si_reg *)xsc->sc_maddr;
}
switch (cmd) {
case TCSIDEBUG:
#ifdef SI_DEBUG
SUCHECK;
if (xpp->sp_debug)
xpp->sp_debug = 0;
else {
xpp->sp_debug = DBG_ALL;
DPRINT((xpp, DBG_IOCTL, "debug toggled %s\n",
(xpp->sp_debug&DBG_ALL)?"ON":"OFF"));
}
break;
#else
error = ENODEV;
goto out;
#endif
case TCSISDBG_LEVEL:
case TCSIGDBG_LEVEL:
#ifdef SI_DEBUG
if (cmd == TCSIGDBG_LEVEL) {
dp->tc_dbglvl = xpp->sp_debug;
} else {
SUCHECK;
xpp->sp_debug = dp->tc_dbglvl;
}
break;
#else
error = ENODEV;
goto out;
#endif
case TCSIGRXIT:
dp->tc_int = regp->rx_int_count;
break;
case TCSIRXIT:
SUCHECK;
regp->rx_int_count = dp->tc_int;
break;
case TCSIGIT:
dp->tc_int = regp->int_count;
break;
case TCSIIT:
SUCHECK;
regp->int_count = dp->tc_int;
break;
case TCSISTATE:
dp->tc_int = xpp->sp_ccb->hi_ip;
break;
/* these next three use a different structure */
case TCSI_PORT:
SUCHECK;
bcopy(xpp, &sps->tc_siport, sizeof(sps->tc_siport));
break;
case TCSI_CCB:
SUCHECK;
bcopy((char *)xpp->sp_ccb, &sps->tc_ccb, sizeof(sps->tc_ccb));
break;
case TCSI_TTY:
SUCHECK;
bcopy(xpp->sp_tty, &sps->tc_tty, sizeof(sps->tc_tty));
break;
default:
error = EINVAL;
goto out;
}
out:
splx(oldspl);
return(error); /* success */
}
/*
* siparam() : Configure line params
* called at spltty();
* this may sleep, does not flush, nor wait for drain, nor block writes
* caller must arrange this if it's important..
*/
static int
siparam(tp, t)
register struct tty *tp;
register struct termios *t;
{
register struct si_port *pp = TP2PP(tp);
volatile struct si_channel *ccbp;
int oldspl, cflag, iflag, oflag, lflag;
int error = 0; /* shutup gcc */
int ispeed = 0; /* shutup gcc */
int ospeed = 0; /* shutup gcc */
BYTE val;
DPRINT((pp, DBG_ENTRY|DBG_PARAM, "siparam(%x,%x)\n", tp, t));
cflag = t->c_cflag;
iflag = t->c_iflag;
oflag = t->c_oflag;
lflag = t->c_lflag;
DPRINT((pp, DBG_PARAM, "OFLAG 0x%x CFLAG 0x%x IFLAG 0x%x LFLAG 0x%x\n",
oflag, cflag, iflag, lflag));
/* if not hung up.. */
if (t->c_ospeed != 0) {
/* translate baud rate to firmware values */
ospeed = ttspeedtab(t->c_ospeed, bdrates);
ispeed = t->c_ispeed ?
ttspeedtab(t->c_ispeed, bdrates) : ospeed;
/* enforce legit baud rate */
if (ospeed < 0 || ispeed < 0)
return (EINVAL);
}
oldspl = spltty();
ccbp = pp->sp_ccb;
/* ========== set hi_break ========== */
val = 0;
if (iflag & IGNBRK) /* Breaks */
val |= BR_IGN;
if (iflag & BRKINT) /* Interrupt on break? */
val |= BR_INT;
if (iflag & PARMRK) /* Parity mark? */
val |= BR_PARMRK;
if (iflag & IGNPAR) /* Ignore chars with parity errors? */
val |= BR_PARIGN;
ccbp->hi_break = val;
/* ========== set hi_csr ========== */
/* if not hung up.. */
if (t->c_ospeed != 0) {
/* Set I/O speeds */
val = (ispeed << 4) | ospeed;
}
ccbp->hi_csr = val;
/* ========== set hi_mr2 ========== */
val = 0;
if (cflag & CSTOPB) /* Stop bits */
val |= MR2_2_STOP;
else
val |= MR2_1_STOP;
/*
* Enable H/W RTS/CTS handshaking. The default TA/MTA is
* a DCE, hence the reverse sense of RTS and CTS
*/
/* Output Flow - RTS must be raised before data can be sent */
if (cflag & CCTS_OFLOW)
val |= MR2_RTSCONT;
ccbp->hi_mr2 = val;
/* ========== set hi_mr1 ========== */
val = 0;
if (!(cflag & PARENB)) /* Parity */
val |= MR1_NONE;
else
val |= MR1_WITH;
if (cflag & PARODD)
val |= MR1_ODD;
if ((cflag & CS8) == CS8) { /* 8 data bits? */
val |= MR1_8_BITS;
} else if ((cflag & CS7) == CS7) { /* 7 data bits? */
val |= MR1_7_BITS;
} else if ((cflag & CS6) == CS6) { /* 6 data bits? */
val |= MR1_6_BITS;
} else { /* Must be 5 */
val |= MR1_5_BITS;
}
/*
* Enable H/W RTS/CTS handshaking. The default TA/MTA is
* a DCE, hence the reverse sense of RTS and CTS
*/
/* Input Flow - CTS is raised when port is ready to receive data */
if (cflag & CRTS_IFLOW)
val |= MR1_CTSCONT;
ccbp->hi_mr1 = val;
/* ========== set hi_mask ========== */
val = 0xff;
if ((cflag & CS8) == CS8) { /* 8 data bits? */
val &= 0xFF;
} else if ((cflag & CS7) == CS7) { /* 7 data bits? */
val &= 0x7F;
} else if ((cflag & CS6) == CS6) { /* 6 data bits? */
val &= 0x3F;
} else { /* Must be 5 */
val &= 0x1F;
}
if (iflag & ISTRIP)
val &= 0x7F;
ccbp->hi_mask = val;
/* ========== set hi_prtcl ========== */
val = 0;
/* Monitor DCD etc. if a modem */
if (!(cflag & CLOCAL))
val |= SP_DCEN;
if (iflag & IXANY)
val |= SP_TANY;
if (iflag & IXON)
val |= SP_TXEN;
if (iflag & IXOFF)
val |= SP_RXEN;
if (iflag & INPCK)
val |= SP_PAEN;
ccbp->hi_prtcl = val;
/* ========== set hi_{rx|tx}{on|off} ========== */
/* XXX: the card TOTALLY shields us from the flow control... */
ccbp->hi_txon = t->c_cc[VSTART];
ccbp->hi_txoff = t->c_cc[VSTOP];
ccbp->hi_rxon = t->c_cc[VSTART];
ccbp->hi_rxoff = t->c_cc[VSTOP];
/* ========== send settings to the card ========== */
/* potential sleep here */
if (ccbp->hi_stat == IDLE_CLOSE) /* Not yet open */
si_command(pp, LOPEN, SI_WAIT); /* open it */
else
si_command(pp, CONFIG, SI_WAIT); /* change params */
/* ========== set DTR etc ========== */
/* Hangup if ospeed == 0 */
if (t->c_ospeed == 0) {
(void) si_modem(pp, BIC, TIOCM_DTR|TIOCM_RTS);
} else {
/*
* If the previous speed was 0, may need to re-enable
* the modem signals
*/
(void) si_modem(pp, SET, TIOCM_DTR|TIOCM_RTS);
}
DPRINT((pp, DBG_PARAM, "siparam, complete: MR1 %x MR2 %x HI_MASK %x PRTCL %x HI_BREAK %x\n",
ccbp->hi_mr1, ccbp->hi_mr2, ccbp->hi_mask, ccbp->hi_prtcl, ccbp->hi_break));
splx(oldspl);
return(error);
}
/*
* Enable or Disable the writes to this channel...
* "state" -> enabled = 1; disabled = 0;
*/
static void
si_write_enable(pp, state)
register struct si_port *pp;
int state;
{
int oldspl;
oldspl = spltty();
if (state) {
pp->sp_state &= ~SS_BLOCKWRITE;
if (pp->sp_state & SS_WAITWRITE) {
pp->sp_state &= ~SS_WAITWRITE;
/* thunder away! */
wakeup((caddr_t)pp);
}
} else {
pp->sp_state |= SS_BLOCKWRITE;
}
splx(oldspl);
}
/*
* Set/Get state of modem control lines.
* Due to DCE-like behaviour of the adapter, some signals need translation:
* TIOCM_DTR DSR
* TIOCM_RTS CTS
*/
static int
si_modem(pp, cmd, bits)
struct si_port *pp;
enum si_mctl cmd;
int bits;
{
volatile struct si_channel *ccbp;
int x;
DPRINT((pp, DBG_ENTRY|DBG_MODEM, "si_modem(%x,%s,%x)\n", pp, si_mctl2str(cmd), bits));
ccbp = pp->sp_ccb; /* Find channel address */
switch (cmd) {
case GET:
x = ccbp->hi_ip;
bits = TIOCM_LE;
if (x & IP_DCD) bits |= TIOCM_CAR;
if (x & IP_DTR) bits |= TIOCM_DTR;
if (x & IP_RTS) bits |= TIOCM_RTS;
if (x & IP_RI) bits |= TIOCM_RI;
return(bits);
case SET:
ccbp->hi_op &= ~(OP_DSR|OP_CTS);
/* fall through */
case BIS:
x = 0;
if (bits & TIOCM_DTR)
x |= OP_DSR;
if (bits & TIOCM_RTS)
x |= OP_CTS;
ccbp->hi_op |= x;
break;
case BIC:
if (bits & TIOCM_DTR)
ccbp->hi_op &= ~OP_DSR;
if (bits & TIOCM_RTS)
ccbp->hi_op &= ~OP_CTS;
}
return 0;
}
/*
* Handle change of modem state
*/
static void
si_modem_state(pp, tp, hi_ip)
register struct si_port *pp;
register struct tty *tp;
register int hi_ip;
{
/* if a modem dev */
if (hi_ip & IP_DCD) {
if ( !(pp->sp_last_hi_ip & IP_DCD)) {
DPRINT((pp, DBG_INTR, "modem carr on t_line %d\n",
tp->t_line));
(void)(*linesw[tp->t_line].l_modem)(tp, 1);
}
} else {
if (pp->sp_last_hi_ip & IP_DCD) {
DPRINT((pp, DBG_INTR, "modem carr off\n"));
if ((*linesw[tp->t_line].l_modem)(tp, 0))
(void) si_modem(pp, SET, 0);
}
}
pp->sp_last_hi_ip = hi_ip;
}
/*
* Poller to catch missed interrupts.
*
* Note that the SYSV Specialix drivers poll at 100 times per second to get
* better response. We could really use a "periodic" version timeout(). :-)
*/
#ifdef POLL
static void
si_poll(void *nothing)
{
register struct si_softc *sc;
register int i;
volatile struct si_reg *regp;
register struct si_port *pp;
int lost, oldspl, port;
DPRINT((0, DBG_POLL, "si_poll()\n"));
oldspl = spltty();
if (in_intr)
goto out;
lost = 0;
for (i=0; i<NSI; i++) {
sc = &si_softc[i];
if (sc->sc_type == SIEMPTY)
continue;
regp = (struct si_reg *)sc->sc_maddr;
/*
* See if there has been a pending interrupt for 2 seconds
* or so. The test <int_scounter >= 200) won't correspond
* to 2 seconds if int_count gets changed.
*/
if (regp->int_pending != 0) {
if (regp->int_scounter >= 200 &&
regp->initstat == 1) {
printf("si%d: lost intr\n", i);
lost++;
}
} else {
regp->int_scounter = 0;
}
/*
* gripe about no input flow control..
*/
pp = sc->sc_ports;
for (port = 0; port < sc->sc_nport; pp++, port++) {
if (pp->sp_delta_overflows > 0) {
printf("si%d: %d tty level buffer overflows\n",
i, pp->sp_delta_overflows);
pp->sp_delta_overflows = 0;
}
}
}
if (lost)
siintr(-1); /* call intr with fake vector */
out:
splx(oldspl);
timeout(si_poll, (caddr_t)0L, si_pollrate);
}
#endif /* ifdef POLL */
/*
* The interrupt handler polls ALL ports on ALL adapters each time
* it is called.
*/
static BYTE si_rxbuf[SI_BUFFERSIZE]; /* input staging area */
void
siintr(int unit)
{
register struct si_softc *sc;
register struct si_port *pp;
volatile struct si_channel *ccbp;
register struct tty *tp;
volatile caddr_t maddr;
BYTE op, ip;
int x, card, port, n, i, isopen;
volatile BYTE *z;
BYTE c;
DPRINT((0, (unit < 0) ? DBG_POLL:DBG_INTR, "siintr(%d)\n", unit));
if (in_intr) {
if (unit < 0) /* should never happen */
return;
printf("si%d: Warning interrupt handler re-entered\n",
unit);
return;
}
in_intr = 1;
/*
* When we get an int we poll all the channels and do ALL pending
* work, not just the first one we find. This allows all cards to
* share the same vector.
*/
for (card=0; card < NSI; card++) {
sc = &si_softc[card];
if (sc->sc_type == SIEMPTY)
continue;
/*
* First, clear the interrupt
*/
switch(sc->sc_type) {
case SIHOST :
maddr = sc->sc_maddr;
((volatile struct si_reg *)maddr)->int_pending = 0;
/* flag nothing pending */
*(maddr+SIINTCL) = 0x00; /* Set IRQ clear */
*(maddr+SIINTCL_CL) = 0x00; /* Clear IRQ clear */
break;
case SIHOST2:
maddr = sc->sc_maddr;
((volatile struct si_reg *)maddr)->int_pending = 0;
*(maddr+SIPLIRQCLR) = 0x00;
*(maddr+SIPLIRQCLR) = 0x10;
break;
case SIEISA:
#if NEISA > 0
maddr = sc->sc_maddr;
((volatile struct si_reg *)maddr)->int_pending = 0;
(void)inb(sc->sc_eisa_iobase+3);
break;
#endif /* fall through if not EISA kernel */
case SIEMPTY:
default:
continue;
}
((volatile struct si_reg *)maddr)->int_scounter = 0;
/*
* check each port
*/
for (pp=sc->sc_ports,port=0; port < sc->sc_nport; pp++,port++) {
ccbp = pp->sp_ccb;
tp = pp->sp_tty;
/*
* See if a command has completed ?
*/
if (ccbp->hi_stat != pp->sp_pend) {
DPRINT((pp, DBG_INTR,
"siintr hi_stat = 0x%x, pend = %d\n",
ccbp->hi_stat, pp->sp_pend));
switch(pp->sp_pend) {
case LOPEN:
case MPEND:
case MOPEN:
case CONFIG:
case SBREAK:
case EBREAK:
pp->sp_pend = ccbp->hi_stat;
/* sleeping in si_command */
wakeup(&pp->sp_state);
break;
default:
pp->sp_pend = ccbp->hi_stat;
}
}
/*
* Continue on if it's closed
*/
if (ccbp->hi_stat == IDLE_CLOSE) {
continue;
}
/*
* Do modem state change if not a local device
*/
si_modem_state(pp, tp, ccbp->hi_ip);
/*
* Check to see if there's we should 'receive'
* characters.
*/
if (tp->t_state & TS_CONNECTED &&
tp->t_state & TS_ISOPEN)
isopen = 1;
else
isopen = 0;
/*
* Do input break processing
*/
if (ccbp->hi_state & ST_BREAK) {
if (isopen) {
(*linesw[tp->t_line].l_rint)(TTY_BI, tp);
}
ccbp->hi_state &= ~ST_BREAK; /* A Bit iffy this */
DPRINT((pp, DBG_INTR, "si_intr break\n"));
}
/*
* Do RX stuff - if not open then dump any characters.
* XXX: This is VERY messy and needs to be cleaned up.
*
* XXX: can we leave data in the host adapter buffer
* when the clists are full? That may be dangerous
* if the user cannot get an interrupt signal through.
*/
more_rx: /* XXX Sorry. the nesting was driving me bats! :-( */
if (!isopen) {
ccbp->hi_rxopos = ccbp->hi_rxipos;
goto end_rx;
}
/*
* If the tty input buffers are blocked, stop emptying
* the incoming buffers and let the auto flow control
* assert..
*/
if (tp->t_state & TS_TBLOCK) {
goto end_rx;
}
/*
* Process read characters if not skipped above
*/
op = ccbp->hi_rxopos;
ip = ccbp->hi_rxipos;
c = ip - op;
if (c == 0) {
goto end_rx;
}
n = c & 0xff;
if (n > 250)
n = 250;
DPRINT((pp, DBG_INTR, "n = %d, op = %d, ip = %d\n",
n, op, ip));
/*
* Suck characters out of host card buffer into the
* "input staging buffer" - so that we dont leave the
* host card in limbo while we're possibly echoing
* characters and possibly flushing input inside the
* ldisc l_rint() routine.
*/
if (n <= SI_BUFFERSIZE - op) {
DPRINT((pp, DBG_INTR, "\tsingle copy\n"));
z = ccbp->hi_rxbuf + op;
bcopy((caddr_t)z, si_rxbuf, n);
op += n;
} else {
x = SI_BUFFERSIZE - op;
DPRINT((pp, DBG_INTR, "\tdouble part 1 %d\n", x));
z = ccbp->hi_rxbuf + op;
bcopy((caddr_t)z, si_rxbuf, x);
DPRINT((pp, DBG_INTR, "\tdouble part 2 %d\n", n-x));
z = ccbp->hi_rxbuf;
bcopy((caddr_t)z, si_rxbuf+x, n-x);
op += n;
}
/* clear collected characters from buffer */
ccbp->hi_rxopos = op;
DPRINT((pp, DBG_INTR, "n = %d, op = %d, ip = %d\n",
n, op, ip));
/*
* at this point...
* n = number of chars placed in si_rxbuf
*/
/*
* Avoid the grotesquely inefficient lineswitch
* routine (ttyinput) in "raw" mode. It usually
* takes about 450 instructions (that's without
* canonical processing or echo!). slinput is
* reasonably fast (usually 40 instructions
* plus call overhead).
*/
if (tp->t_state & TS_CAN_BYPASS_L_RINT) {
/* block if the driver supports it */
if (tp->t_rawq.c_cc + n >= SI_I_HIGH_WATER
&& (tp->t_cflag & CRTS_IFLOW
|| tp->t_iflag & IXOFF)
&& !(tp->t_state & TS_TBLOCK))
ttyblock(tp);
tk_nin += n;
tk_rawcc += n;
tp->t_rawcc += n;
pp->sp_delta_overflows +=
b_to_q((char *)si_rxbuf, n, &tp->t_rawq);
ttwakeup(tp);
if (tp->t_state & TS_TTSTOP
&& (tp->t_iflag & IXANY
|| tp->t_cc[VSTART] == tp->t_cc[VSTOP])) {
tp->t_state &= ~TS_TTSTOP;
tp->t_lflag &= ~FLUSHO;
si_start(tp);
}
} else {
/*
* It'd be nice to not have to go through the
* function call overhead for each char here.
* It'd be nice to block input it, saving a
* loop here and the call/return overhead.
*/
for(x = 0; x < n; x++) {
i = si_rxbuf[x];
if ((*linesw[tp->t_line].l_rint)(i, tp)
== -1) {
pp->sp_delta_overflows++;
}
/*
* doesn't seem to be much point doing
* this here.. this driver has no
* softtty processing! ??
*/
if (pp->sp_hotchar && i == pp->sp_hotchar) {
setsofttty();
}
}
}
goto more_rx; /* try for more until RXbuf is empty */
end_rx: /* XXX: Again, sorry about the gotos.. :-) */
/*
* Do TX stuff
*/
(*linesw[tp->t_line].l_start)(tp);
} /* end of for (all ports on this controller) */
} /* end of for (all controllers) */
in_intr = 0;
DPRINT((0, (unit < 0) ? DBG_POLL:DBG_INTR, "end siintr(%d)\n", unit));
}
/*
* Nudge the transmitter...
*
* XXX: I inherited some funny code here. It implies the host card only
* interrupts when the transmit buffer reaches the low-water-mark, and does
* not interrupt when it's actually hits empty. In some cases, we have
* processes waiting for complete drain, and we need to simulate an interrupt
* about when we think the buffer is going to be empty (and retry if not).
* I really am not certain about this... I *need* the hardware manuals.
*/
static void
si_start(tp)
register struct tty *tp;
{
struct si_port *pp;
volatile struct si_channel *ccbp;
register struct clist *qp;
register char *dptr;
BYTE ipos;
int nchar;
int oldspl, count, n, amount, buffer_full;
int do_exitproc;
oldspl = spltty();
qp = &tp->t_outq;
pp = TP2PP(tp);
DPRINT((pp, DBG_ENTRY|DBG_START,
"si_start(%x) t_state %x sp_state %x t_outq.c_cc %d\n",
tp, tp->t_state, pp->sp_state, qp->c_cc));
if (tp->t_state & (TS_TIMEOUT|TS_TTSTOP))
goto out;
do_exitproc = 0;
buffer_full = 0;
ccbp = pp->sp_ccb;
/*
* Handle the case where ttywait() is called on process exit
* this may be BSDI specific, I dont know...
*/
if (tp->t_session != NULL && tp->t_session->s_leader != NULL &&
(tp->t_session->s_leader->p_flag & P_WEXIT)) {
do_exitproc++;
}
count = (int)ccbp->hi_txipos - (int)ccbp->hi_txopos;
DPRINT((pp, DBG_START, "count %d\n", (BYTE)count));
dptr = (char *)ccbp->hi_txbuf; /* data buffer */
while ((nchar = qp->c_cc) > 0) {
if ((BYTE)count >= 255) {
buffer_full++;
break;
}
amount = min(nchar, (255 - (BYTE)count));
ipos = (unsigned int)ccbp->hi_txipos;
/* will it fit in one lump? */
if ((SI_BUFFERSIZE - ipos) >= amount) {
n = q_to_b(&tp->t_outq,
(char *)&ccbp->hi_txbuf[ipos], amount);
} else {
n = q_to_b(&tp->t_outq,
(char *)&ccbp->hi_txbuf[ipos],
SI_BUFFERSIZE-ipos);
if (n == SI_BUFFERSIZE-ipos) {
n += q_to_b(&tp->t_outq,
(char *)&ccbp->hi_txbuf[0],
amount - (SI_BUFFERSIZE-ipos));
}
}
ccbp->hi_txipos += n;
count = (int)ccbp->hi_txipos - (int)ccbp->hi_txopos;
}
if (count != 0 && nchar == 0) {
tp->t_state |= TS_BUSY;
} else {
tp->t_state &= ~TS_BUSY;
}
/* wakeup time? */
ttwwakeup(tp);
DPRINT((pp, DBG_START, "count %d, nchar %d, tp->t_state 0x%x\n",
(BYTE)count, nchar, tp->t_state));
if ((tp->t_state & TS_BUSY) || do_exitproc)
{
int time;
if (do_exitproc != 0) {
time = hz / 10;
} else {
time = ttspeedtab(tp->t_ospeed, chartimes);
if (time > 0) {
if (time < nchar)
time = nchar / time;
else
time = 2;
} else {
DPRINT((pp, DBG_START,
"bad char time value! %d\n", time));
time = hz/10;
}
}
if ((pp->sp_state & (SS_LSTART|SS_INLSTART)) == SS_LSTART) {
untimeout((timeout_func_t)si_lstart, (caddr_t)pp);
} else {
pp->sp_state |= SS_LSTART;
}
DPRINT((pp, DBG_START, "arming lstart, time=%d\n", time));
timeout((timeout_func_t)si_lstart, (caddr_t)pp, time);
}
out:
splx(oldspl);
DPRINT((pp, DBG_EXIT|DBG_START, "leave si_start()\n"));
}
/*
* Note: called at splsoftclock from the timeout code
* This has to deal with two things... cause wakeups while waiting for
* tty drains on last process exit, and call l_start at about the right
* time for protocols like ppp.
*/
static void
si_lstart(pp)
register struct si_port *pp;
{
register struct tty *tp;
int oldspl;
DPRINT((pp, DBG_ENTRY|DBG_LSTART, "si_lstart(%x) sp_state %x\n",
pp, pp->sp_state));
oldspl = spltty();
if ((pp->sp_state & SS_OPEN) == 0 || (pp->sp_state & SS_LSTART) == 0) {
splx(oldspl);
return;
}
pp->sp_state &= ~SS_LSTART;
pp->sp_state |= SS_INLSTART;
tp = pp->sp_tty;
/* deal with the process exit case */
ttwwakeup(tp);
/* nudge protocols - eg: ppp */
(*linesw[tp->t_line].l_start)(tp);
pp->sp_state &= ~SS_INLSTART;
splx(oldspl);
}
/*
* Stop output on a line. called at spltty();
*/
void
sistop(tp, rw)
register struct tty *tp;
int rw;
{
volatile struct si_channel *ccbp;
struct si_port *pp;
pp = TP2PP(tp);
ccbp = pp->sp_ccb;
DPRINT((TP2PP(tp), DBG_ENTRY|DBG_STOP, "sistop(%x,%x)\n", tp, rw));
/* XXX: must check (rw & FWRITE | FREAD) etc flushing... */
if (rw & FWRITE) {
/* what level are we meant to be flushing anyway? */
if (tp->t_state & TS_BUSY) {
si_command(TP2PP(tp), WFLUSH, SI_NOWAIT);
tp->t_state &= ~TS_BUSY;
ttwwakeup(tp); /* Bruce???? */
}
}
#if 1 /* XXX: this doesn't work right yet.. */
/* XXX: this may have been failing because we used to call l_rint()
* while we were looping based on these two counters. Now, we collect
* the data and then loop stuffing it into l_rint(), making this
* useless. Should we cause this to blow away the staging buffer?
*/
if (rw & FREAD) {
ccbp->hi_rxopos = ccbp->hi_rxipos;
}
#endif
}
/*
* Issue a command to the Z280 host card CPU.
*/
static void
si_command(pp, cmd, waitflag)
struct si_port *pp; /* port control block (local) */
int cmd;
int waitflag;
{
int oldspl;
volatile struct si_channel *ccbp = pp->sp_ccb;
int x;
DPRINT((pp, DBG_ENTRY|DBG_PARAM, "si_command(%x,%x,%d): hi_stat 0x%x\n",
pp, cmd, waitflag, ccbp->hi_stat));
oldspl = spltty(); /* Keep others out */
/* wait until it's finished what it was doing.. */
/* XXX: sits in IDLE_BREAK until something disturbs it or break
* is turned off. */
while((x = ccbp->hi_stat) != IDLE_OPEN &&
x != IDLE_CLOSE &&
x != IDLE_BREAK &&
x != cmd) {
if (in_intr) { /* Prevent sleep in intr */
DPRINT((pp, DBG_PARAM,
"cmd intr collision - completing %d\trequested %d\n",
x, cmd));
splx(oldspl);
return;
} else if (ttysleep(pp->sp_tty, (caddr_t)&pp->sp_state, TTIPRI|PCATCH,
"sicmd1", 1)) {
splx(oldspl);
return;
}
}
/* it should now be in IDLE_{OPEN|CLOSE|BREAK}, or "cmd" */
/* if there was a pending command, cause a state-change wakeup */
switch(pp->sp_pend) {
case LOPEN:
case MPEND:
case MOPEN:
case CONFIG:
case SBREAK:
case EBREAK:
wakeup(&pp->sp_state);
break;
default:
break;
}
pp->sp_pend = cmd; /* New command pending */
ccbp->hi_stat = cmd; /* Post it */
if (waitflag) {
if (in_intr) { /* If in interrupt handler */
DPRINT((pp, DBG_PARAM,
"attempt to sleep in si_intr - cmd req %d\n",
cmd));
splx(oldspl);
return;
} else while(ccbp->hi_stat != IDLE_OPEN &&
ccbp->hi_stat != IDLE_BREAK) {
if (ttysleep(pp->sp_tty, (caddr_t)&pp->sp_state, TTIPRI|PCATCH,
"sicmd2", 0))
break;
}
}
splx(oldspl);
}
static void
si_disc_optim(tp, t, pp)
struct tty *tp;
struct termios *t;
struct si_port *pp;
{
/*
* XXX can skip a lot more cases if Smarts. Maybe
* (IGNCR | ISTRIP | IXON) in c_iflag. But perhaps we
* shouldn't skip if (TS_CNTTB | TS_LNCH) is set in t_state.
*/
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;
/*
* Prepare to reduce input latency for packet
* discplines with a end of packet character.
*/
if (tp->t_line == SLIPDISC)
pp->sp_hotchar = 0xc0;
else if (tp->t_line == PPPDISC)
pp->sp_hotchar = 0x7e;
else
pp->sp_hotchar = 0;
DPRINT((pp, DBG_OPTIM, "bypass: %s, hotchar: %x\n",
(tp->t_state & TS_CAN_BYPASS_L_RINT) ? "on" : "off",
pp->sp_hotchar));
}
#ifdef SI_DEBUG
static void
#ifdef __STDC__
si_dprintf(struct si_port *pp, int flags, const char *fmt, ...)
#else
si_dprintf(pp, flags, fmt, va_alist)
struct si_port *pp;
int flags;
char *fmt;
#endif
{
va_list ap;
if ((pp == NULL && (si_debug&flags)) ||
(pp != NULL && ((pp->sp_debug&flags) || (si_debug&flags)))) {
if (pp != NULL)
printf("%ci%d(%d): ", 's',
(int)SI_CARD(pp->sp_tty->t_dev),
(int)SI_PORT(pp->sp_tty->t_dev));
va_start(ap, fmt);
vprintf(fmt, ap);
va_end(ap);
}
}
static char *
si_mctl2str(cmd)
enum si_mctl cmd;
{
switch (cmd) {
case GET: return("GET");
case SET: return("SET");
case BIS: return("BIS");
case BIC: return("BIC");
}
return("BAD");
}
#endif /* DEBUG */
static si_devsw_installed = 0;
static void si_drvinit(void *unused)
{
dev_t dev;
if( ! si_devsw_installed ) {
dev = makedev(CDEV_MAJOR, 0);
cdevsw_add(&dev,&si_cdevsw, NULL);
si_devsw_installed = 1;
}
}
SYSINIT(sidev,SI_SUB_DRIVERS,SI_ORDER_MIDDLE+CDEV_MAJOR,si_drvinit,NULL)
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