Subject: Re: Hayes ESP
To: John Nemeth <jnemeth@cue.bc.ca>
From: Michael L. VanLoon -- HeadCandy.com <michaelv@HeadCandy.com>
List: port-i386
Date: 01/23/1996 21:44:49
> Can somebody send me the latest patches to support the Hayes ESP
>card, or give me a pointer to where I can find them? Is there any
>possibility of putting these patches into the tree?
This is a slightly modified version of the last one John Vinopal
hacked (which was a modification of mine, which was a modification of
the original, by Robert Dobbs, which was a modification of the stock
com.c -- got that?). There are two files: /sys/dev/isa/com.c and
/sys/dev/ic/espreg.h. Part of my modifications to this version are
just some printf's I added to do some statistical gathering. So,
ignore them if occasionally you see something about "Port 0x123 sent
234 max bytes in a buffer" or something similar. Here they are...
com.c (in /sys/dev/isa/):
----------------------------------------------------------------------
/* $NetBSD: com.c,v 1.63 1995/12/24 02:31:15 mycroft Exp $ */
/*-
* Copyright (c) 1993, 1994, 1995 Charles M. Hannum. All rights reserved.
* Copyright (c) 1991 The Regents of the University of California.
* All rights reserved.
*
* 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
* notice, this list of conditions and the following disclaimer.
* 2. Redistributions in binary form must reproduce the above copyright
* notice, 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 the University of
* California, Berkeley and its contributors.
* 4. Neither the name of the University nor the names of its contributors
* may be used to endorse or promote products derived from this software
* without specific prior written permission.
*
* THIS SOFTWARE IS PROVIDED BY THE REGENTS AND CONTRIBUTORS ``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 REGENTS OR CONTRIBUTORS BE LIABLE
* FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
* DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
* OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
* HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
* LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
* OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
* SUCH DAMAGE.
*
* @(#)com.c 7.5 (Berkeley) 5/16/91
*/
/*
* COM driver, based on HP dca driver
* uses National Semiconductor NS16450/NS16550AF UART
*/
#include <sys/param.h>
#include <sys/systm.h>
#include <sys/ioctl.h>
#include <sys/select.h>
#include <sys/tty.h>
#include <sys/proc.h>
#include <sys/user.h>
#include <sys/conf.h>
#include <sys/file.h>
#include <sys/uio.h>
#include <sys/kernel.h>
#include <sys/syslog.h>
#include <sys/types.h>
#include <sys/device.h>
#include <machine/cpu.h>
#include <machine/pio.h>
#include <dev/isa/isavar.h>
#include <dev/isa/comreg.h>
#include <dev/ic/ns16550reg.h>
#ifdef COM_ESP
#include <dev/ic/espreg.h>
#endif
#define com_lcr com_cfcr
/*#define COM_IBUFSIZE (2 * 256)*/
#define COM_IBUFSIZE (2 * 1024)
#define COM_IHIGHWATER ((3 * COM_IBUFSIZE) / 4)
int g_dataoutmax = 0;
int g_datainmax = 0;
struct com_softc {
struct device sc_dev;
void *sc_ih;
struct tty *sc_tty;
int sc_overflows;
int sc_floods;
int sc_errors;
int sc_iobase;
#ifdef COM_ESP
int sc_espbase;
#endif
u_char sc_hwflags;
#define COM_HW_NOIEN 0x01
#define COM_HW_FIFO 0x02
#define COM_HW_ESP 0x04
#define COM_HW_CONSOLE 0x40
u_char sc_swflags;
#define COM_SW_SOFTCAR 0x01
#define COM_SW_CLOCAL 0x02
#define COM_SW_CRTSCTS 0x04
#define COM_SW_MDMBUF 0x08
u_char sc_msr, sc_mcr, sc_lcr;
u_char sc_dtr;
u_char *sc_ibuf, *sc_ibufp, *sc_ibufhigh, *sc_ibufend;
u_char sc_ibufs[2][COM_IBUFSIZE];
};
int comprobe __P((struct device *, void *, void *));
void comattach __P((struct device *, struct device *, void *));
int comopen __P((dev_t, int, int, struct proc *));
int comclose __P((dev_t, int, int, struct proc *));
void comdiag __P((void *));
int comintr __P((void *));
void compoll __P((void *));
int comparam __P((struct tty *, struct termios *));
void comstart __P((struct tty *));
struct cfdriver comcd = {
NULL, "com", comprobe, comattach, DV_TTY, sizeof(struct com_softc)
};
int comdefaultrate = TTYDEF_SPEED;
#ifdef COMCONSOLE
int comconsole = COMCONSOLE;
#else
int comconsole = -1;
#endif
int comconsinit;
int commajor;
int comsopen = 0;
int comevents = 0;
#ifdef KGDB
#include <machine/remote-sl.h>
extern int kgdb_dev;
extern int kgdb_rate;
extern int kgdb_debug_init;
#endif
#define COMUNIT(x) (minor(x))
/* Macros to clear/set/test flags. */
#define SET(t, f) (t) |= (f)
#define CLR(t, f) (t) &= ~(f)
#define ISSET(t, f) ((t) & (f))
int
comspeed(speed)
long speed;
{
#define divrnd(n, q) (((n)*2/(q)+1)/2) /* divide and round off */
int x, err;
if (speed == 0)
return 0;
if (speed < 0)
return -1;
x = divrnd((COM_FREQ / 16), speed);
if (x <= 0)
return -1;
err = divrnd((COM_FREQ / 16) * 1000, speed * x) - 1000;
if (err < 0)
err = -err;
if (err > COM_TOLERANCE)
return -1;
return x;
#undef divrnd(n, q)
}
int
comprobe1(iobase)
int iobase;
{
/* force access to id reg */
outb(iobase + com_lcr, 0);
outb(iobase + com_iir, 0);
if (inb(iobase + com_iir) & 0x38)
return 0;
return 1;
}
int
comprobe(parent, match, aux)
struct device *parent;
void *match, *aux;
{
struct isa_attach_args *ia = aux;
int iobase = ia->ia_iobase;
if (!comprobe1(iobase))
return 0;
ia->ia_iosize = COM_NPORTS;
ia->ia_msize = 0;
return 1;
}
#ifdef COM_ESP
int
comprobeESP(esp_port, sc)
int esp_port;
struct com_softc *sc;
{
char val, dips;
int com_base_list[] = { 0x3f8, 0x2f8, 0x3e8, 0x2e8 };
/* Test for ESP signature at the ESP i/o port. */
if ((inb(esp_port) & 0xf3) == 0)
return(0);
/* Check for ability to emulate 16550: bit 8 == 1 */
outb(esp_port + ESP_CMD1, ESP_GETDIPS);
dips = inb(esp_port + ESP_STATUS1);
/* Does this ESP board service this com port? Bits 0,1 */
if (sc->sc_iobase != com_base_list[(dips & 0x03)]) {
return(0);
}
printf(": ESP");
/* Check for ESP version 2.0: bits 4,5,6 == 010 */
outb(esp_port + ESP_CMD1, ESP_GETTEST);
val = inb(esp_port + ESP_STATUS1); /* Clear reg 1 */
val = inb(esp_port + ESP_STATUS2);
if ((val & 0x70) < 0x20) {
printf("-old (%o)", val & 0x70);
return(0);
}
/* Check for ability to emulate 16550: bit 7 == 1 */
if ((dips & 0x80) == 0) {
printf(" slave");
return(0);
}
/* We're a full featured ESP card at the right com port. */
sc->sc_hwflags |= COM_HW_ESP;
printf(", 1024 byte fifo\n");
return(1);
}
#endif
void
comattach(parent, self, aux)
struct device *parent, *self;
void *aux;
{
struct com_softc *sc = (void *)self;
struct isa_attach_args *ia = aux;
struct cfdata *cf = sc->sc_dev.dv_cfdata;
int iobase = ia->ia_iobase;
struct tty *tp;
#ifdef COM_ESP
int esp_ports[] = { 0x140, 0x180, 0x280, 0 };
int *espp;
#endif
sc->sc_iobase = iobase;
sc->sc_hwflags = ISSET(cf->cf_flags, COM_HW_NOIEN);
sc->sc_swflags = 0;
if (sc->sc_dev.dv_unit == comconsole)
delay(1000);
#ifdef COM_ESP
/* Look for a Hayes ESP board. */
for (espp = esp_ports; *espp != 0; espp++)
if (comprobeESP(*espp, sc)) {
sc->sc_espbase = *espp;
break;
}
if (*espp == 0) {
/* Look for other things. */
#endif
/* look for a NS 16550AF UART with FIFOs */
outb(iobase + com_fifo,
FIFO_ENABLE | FIFO_RCV_RST | FIFO_XMT_RST | FIFO_TRIGGER_14);
delay(100);
if (ISSET(inb(iobase + com_iir), IIR_FIFO_MASK) == IIR_FIFO_MASK)
if (ISSET(inb(iobase + com_fifo), FIFO_TRIGGER_14) == FIFO_TRIGGER_14) {
SET(sc->sc_hwflags, COM_HW_FIFO);
printf(": ns16550a, working fifo\n");
} else
printf(": ns16550, broken fifo\n");
else
printf(": ns8250 or ns16450, no fifo\n");
outb(iobase + com_fifo, 0);
#ifdef COM_ESP
}
#endif
/* disable interrupts */
outb(iobase + com_ier, 0);
outb(iobase + com_mcr, 0);
if (ia->ia_irq != IRQUNK)
sc->sc_ih = isa_intr_establish(ia->ia_irq, IST_EDGE, IPL_TTY,
comintr, sc);
#ifdef KGDB
if (kgdb_dev == makedev(commajor, unit)) {
if (comconsole == unit)
kgdb_dev = -1; /* can't debug over console port */
else {
(void) cominit(unit, kgdb_rate);
if (kgdb_debug_init) {
/*
* Print prefix of device name,
* let kgdb_connect print the rest.
*/
printf("%s: ", sc->sc_dev.dv_xname);
kgdb_connect(1);
} else
printf("%s: kgdb enabled\n",
sc->sc_dev.dv_xname);
}
}
#endif
if (sc->sc_dev.dv_unit == comconsole) {
/*
* Need to reset baud rate, etc. of next print so reset
* comconsinit. Also make sure console is always "hardwired".
*/
comconsinit = 0;
SET(sc->sc_hwflags, COM_HW_CONSOLE);
SET(sc->sc_swflags, COM_SW_SOFTCAR);
}
}
int
comopen(dev, flag, mode, p)
dev_t dev;
int flag, mode;
struct proc *p;
{
int unit = COMUNIT(dev);
struct com_softc *sc;
int iobase;
struct tty *tp;
int s;
int error = 0;
if (unit >= comcd.cd_ndevs)
return ENXIO;
sc = comcd.cd_devs[unit];
if (!sc)
return ENXIO;
if (!sc->sc_tty)
tp = sc->sc_tty = ttymalloc();
else
tp = sc->sc_tty;
tp->t_oproc = comstart;
tp->t_param = comparam;
tp->t_dev = dev;
if (!ISSET(tp->t_state, TS_ISOPEN)) {
SET(tp->t_state, TS_WOPEN);
ttychars(tp);
tp->t_iflag = TTYDEF_IFLAG;
tp->t_oflag = TTYDEF_OFLAG;
tp->t_cflag = TTYDEF_CFLAG;
if (ISSET(sc->sc_swflags, COM_SW_CLOCAL))
SET(tp->t_cflag, CLOCAL);
if (ISSET(sc->sc_swflags, COM_SW_CRTSCTS))
SET(tp->t_cflag, CRTSCTS);
if (ISSET(sc->sc_swflags, COM_SW_MDMBUF))
SET(tp->t_cflag, MDMBUF);
tp->t_lflag = TTYDEF_LFLAG;
tp->t_ispeed = tp->t_ospeed = comdefaultrate;
s = spltty();
comparam(tp, &tp->t_termios);
ttsetwater(tp);
if (comsopen++ == 0)
timeout(compoll, NULL, 1);
sc->sc_ibufp = sc->sc_ibuf = sc->sc_ibufs[0];
sc->sc_ibufhigh = sc->sc_ibuf + COM_IHIGHWATER;
sc->sc_ibufend = sc->sc_ibuf + COM_IBUFSIZE;
iobase = sc->sc_iobase;
#ifdef COM_ESP
/* Set up the ESP board */
if (ISSET(sc->sc_hwflags, COM_HW_ESP)) {
outb(iobase + com_fifo,
/* XXX - bug in ESP requires DMA flag set */
FIFO_DMA_MODE |
FIFO_ENABLE | FIFO_RCV_RST |
FIFO_XMT_RST | FIFO_TRIGGER_8);
/* Set 16550 compatibility mode */
outb(sc->sc_espbase + ESP_CMD1, ESP_SETMODE);
outb(sc->sc_espbase + ESP_CMD2,
ESP_MODE_FIFO | ESP_MODE_RTS | ESP_MODE_SCALE);
/* Set RTS/CTS flow control */
outb(sc->sc_espbase + ESP_CMD1, ESP_SETFLOWTYPE);
outb(sc->sc_espbase + ESP_CMD2, ESP_FLOW_RTS);
outb(sc->sc_espbase + ESP_CMD2, ESP_FLOW_CTS);
/* Set flow control levels */
outb(sc->sc_espbase + ESP_CMD1, ESP_SETRXFLOW);
outb(sc->sc_espbase + ESP_CMD2, HIBYTE(768));
outb(sc->sc_espbase + ESP_CMD2, LOBYTE(768));
outb(sc->sc_espbase + ESP_CMD2, HIBYTE(512));
outb(sc->sc_espbase + ESP_CMD2, LOBYTE(512));
} else
#endif
/* Set the FIFO threshold based on the receive speed. */
if (ISSET(sc->sc_hwflags, COM_HW_FIFO))
outb(iobase + com_fifo,
FIFO_ENABLE | FIFO_RCV_RST | FIFO_XMT_RST |
(tp->t_ispeed <= 1200 ? FIFO_TRIGGER_1 : FIFO_TRIGGER_8));
/* flush any pending I/O */
while (ISSET(inb(iobase + com_lsr), LSR_RXRDY))
(void) inb(iobase + com_data);
/* you turn me on, baby */
sc->sc_mcr = MCR_DTR | MCR_RTS;
if (!ISSET(sc->sc_hwflags, COM_HW_NOIEN))
SET(sc->sc_mcr, MCR_IENABLE);
outb(iobase + com_mcr, sc->sc_mcr);
outb(iobase + com_ier,
IER_ERXRDY | IER_ETXRDY | IER_ERLS | IER_EMSC);
sc->sc_msr = inb(iobase + com_msr);
if (ISSET(sc->sc_swflags, COM_SW_SOFTCAR) ||
ISSET(sc->sc_msr, MSR_DCD) || ISSET(tp->t_cflag, MDMBUF))
SET(tp->t_state, TS_CARR_ON);
else
CLR(tp->t_state, TS_CARR_ON);
} else if (ISSET(tp->t_state, TS_XCLUDE) && p->p_ucred->cr_uid != 0)
return EBUSY;
else
s = spltty();
/* wait for carrier if necessary */
if (!ISSET(flag, O_NONBLOCK))
while (!ISSET(tp->t_cflag, CLOCAL) &&
!ISSET(tp->t_state, TS_CARR_ON)) {
SET(tp->t_state, TS_WOPEN);
error = ttysleep(tp, &tp->t_rawq, TTIPRI | PCATCH,
ttopen, 0);
if (error) {
/* XXX should turn off chip if we're the
only waiter */
splx(s);
return error;
}
}
splx(s);
return (*linesw[tp->t_line].l_open)(dev, tp);
}
int
comclose(dev, flag, mode, p)
dev_t dev;
int flag, mode;
struct proc *p;
{
int unit = COMUNIT(dev);
struct com_softc *sc = comcd.cd_devs[unit];
struct tty *tp = sc->sc_tty;
int iobase = sc->sc_iobase;
int s;
/* XXX This is for cons.c. */
if (!ISSET(tp->t_state, TS_ISOPEN))
return 0;
(*linesw[tp->t_line].l_close)(tp, flag);
s = spltty();
CLR(sc->sc_lcr, LCR_SBREAK);
outb(iobase + com_lcr, sc->sc_lcr);
outb(iobase + com_ier, 0);
if (ISSET(tp->t_cflag, HUPCL) &&
!ISSET(sc->sc_swflags, COM_SW_SOFTCAR)) {
/* XXX perhaps only clear DTR */
outb(iobase + com_mcr, 0);
}
CLR(tp->t_state, TS_BUSY | TS_FLUSH);
if (--comsopen == 0)
untimeout(compoll, NULL);
splx(s);
ttyclose(tp);
#ifdef notyet /* XXXX */
if (unit != comconsole) {
ttyfree(tp);
sc->sc_tty = 0;
}
#endif
printf("Closing port 0x%08x; received %d, sent %d, max bytes in a buffer.\n",
iobase, g_datainmax, g_dataoutmax);
return 0;
}
int
comread(dev, uio, flag)
dev_t dev;
struct uio *uio;
int flag;
{
struct com_softc *sc = comcd.cd_devs[COMUNIT(dev)];
struct tty *tp = sc->sc_tty;
return ((*linesw[tp->t_line].l_read)(tp, uio, flag));
}
int
comwrite(dev, uio, flag)
dev_t dev;
struct uio *uio;
int flag;
{
struct com_softc *sc = comcd.cd_devs[COMUNIT(dev)];
struct tty *tp = sc->sc_tty;
return ((*linesw[tp->t_line].l_write)(tp, uio, flag));
}
struct tty *
comtty(dev)
dev_t dev;
{
struct com_softc *sc = comcd.cd_devs[COMUNIT(dev)];
struct tty *tp = sc->sc_tty;
return (tp);
}
static u_char
tiocm_xxx2mcr(data)
int data;
{
u_char m = 0;
if (ISSET(data, TIOCM_DTR))
SET(m, MCR_DTR);
if (ISSET(data, TIOCM_RTS))
SET(m, MCR_RTS);
return m;
}
int
comioctl(dev, cmd, data, flag, p)
dev_t dev;
u_long cmd;
caddr_t data;
int flag;
struct proc *p;
{
int unit = COMUNIT(dev);
struct com_softc *sc = comcd.cd_devs[unit];
struct tty *tp = sc->sc_tty;
int iobase = sc->sc_iobase;
int error;
error = (*linesw[tp->t_line].l_ioctl)(tp, cmd, data, flag, p);
if (error >= 0)
return error;
error = ttioctl(tp, cmd, data, flag, p);
if (error >= 0)
return error;
switch (cmd) {
case TIOCSBRK:
SET(sc->sc_lcr, LCR_SBREAK);
outb(iobase + com_lcr, sc->sc_lcr);
break;
case TIOCCBRK:
CLR(sc->sc_lcr, LCR_SBREAK);
outb(iobase + com_lcr, sc->sc_lcr);
break;
case TIOCSDTR:
SET(sc->sc_mcr, sc->sc_dtr);
outb(iobase + com_mcr, sc->sc_mcr);
break;
case TIOCCDTR:
CLR(sc->sc_mcr, sc->sc_dtr);
outb(iobase + com_mcr, sc->sc_mcr);
break;
case TIOCMSET:
CLR(sc->sc_mcr, MCR_DTR | MCR_RTS);
case TIOCMBIS:
SET(sc->sc_mcr, tiocm_xxx2mcr(*(int *)data));
outb(iobase + com_mcr, sc->sc_mcr);
break;
case TIOCMBIC:
CLR(sc->sc_mcr, tiocm_xxx2mcr(*(int *)data));
outb(iobase + com_mcr, sc->sc_mcr);
break;
case TIOCMGET: {
u_char m;
int bits = 0;
m = sc->sc_mcr;
if (ISSET(m, MCR_DTR))
SET(bits, TIOCM_DTR);
if (ISSET(m, MCR_RTS))
SET(bits, TIOCM_RTS);
m = sc->sc_msr;
if (ISSET(m, MSR_DCD))
SET(bits, TIOCM_CD);
if (ISSET(m, MSR_CTS))
SET(bits, TIOCM_CTS);
if (ISSET(m, MSR_DSR))
SET(bits, TIOCM_DSR);
if (ISSET(m, MSR_RI | MSR_TERI))
SET(bits, TIOCM_RI);
if (inb(iobase + com_ier))
SET(bits, TIOCM_LE);
*(int *)data = bits;
break;
}
case TIOCGFLAGS: {
int driverbits, userbits = 0;
driverbits = sc->sc_swflags;
if (ISSET(driverbits, COM_SW_SOFTCAR))
SET(userbits, TIOCFLAG_SOFTCAR);
if (ISSET(driverbits, COM_SW_CLOCAL))
SET(userbits, TIOCFLAG_CLOCAL);
if (ISSET(driverbits, COM_SW_CRTSCTS))
SET(userbits, TIOCFLAG_CRTSCTS);
if (ISSET(driverbits, COM_SW_MDMBUF))
SET(userbits, TIOCFLAG_MDMBUF);
*(int *)data = userbits;
break;
}
case TIOCSFLAGS: {
int userbits, driverbits = 0;
error = suser(p->p_ucred, &p->p_acflag);
if (error != 0)
return(EPERM);
userbits = *(int *)data;
if (ISSET(userbits, TIOCFLAG_SOFTCAR) ||
ISSET(sc->sc_hwflags, COM_HW_CONSOLE))
SET(driverbits, COM_SW_SOFTCAR);
if (ISSET(userbits, TIOCFLAG_CLOCAL))
SET(driverbits, COM_SW_CLOCAL);
if (ISSET(userbits, TIOCFLAG_CRTSCTS))
SET(driverbits, COM_SW_CRTSCTS);
if (ISSET(userbits, TIOCFLAG_MDMBUF))
SET(driverbits, COM_SW_MDMBUF);
sc->sc_swflags = driverbits;
break;
}
default:
return ENOTTY;
}
return 0;
}
int
comparam(tp, t)
struct tty *tp;
struct termios *t;
{
struct com_softc *sc = comcd.cd_devs[COMUNIT(tp->t_dev)];
int iobase = sc->sc_iobase;
int ospeed = comspeed(t->c_ospeed);
u_char lcr;
tcflag_t oldcflag;
int s;
/* check requested parameters */
if (ospeed < 0 || (t->c_ispeed && t->c_ispeed != t->c_ospeed))
return EINVAL;
lcr = sc->sc_lcr & LCR_SBREAK;
switch (ISSET(t->c_cflag, CSIZE)) {
case CS5:
SET(lcr, LCR_5BITS);
break;
case CS6:
SET(lcr, LCR_6BITS);
break;
case CS7:
SET(lcr, LCR_7BITS);
break;
case CS8:
SET(lcr, LCR_8BITS);
break;
}
if (ISSET(t->c_cflag, PARENB)) {
SET(lcr, LCR_PENAB);
if (!ISSET(t->c_cflag, PARODD))
SET(lcr, LCR_PEVEN);
}
if (ISSET(t->c_cflag, CSTOPB))
SET(lcr, LCR_STOPB);
sc->sc_lcr = lcr;
s = spltty();
if (ospeed == 0) {
CLR(sc->sc_mcr, MCR_DTR);
outb(iobase + com_mcr, sc->sc_mcr);
}
/*
* Set the FIFO threshold based on the receive speed, if we are
* changing it.
*/
if (tp->t_ispeed != t->c_ispeed) {
if (ISSET(sc->sc_hwflags, COM_HW_FIFO))
outb(iobase + com_fifo,
FIFO_ENABLE |
(t->c_ispeed <= 1200 ? FIFO_TRIGGER_1 : FIFO_TRIGGER_8));
}
if (ospeed != 0) {
outb(iobase + com_lcr, lcr | LCR_DLAB);
outb(iobase + com_dlbl, ospeed);
outb(iobase + com_dlbh, ospeed >> 8);
outb(iobase + com_lcr, lcr);
SET(sc->sc_mcr, MCR_DTR);
outb(iobase + com_mcr, sc->sc_mcr);
} else
outb(iobase + com_lcr, lcr);
/* When not using CRTSCTS, RTS follows DTR. */
if (!ISSET(t->c_cflag, CRTSCTS)) {
if (ISSET(sc->sc_mcr, MCR_DTR)) {
if (!ISSET(sc->sc_mcr, MCR_RTS)) {
SET(sc->sc_mcr, MCR_RTS);
outb(iobase + com_mcr, sc->sc_mcr);
}
} else {
if (ISSET(sc->sc_mcr, MCR_RTS)) {
CLR(sc->sc_mcr, MCR_RTS);
outb(iobase + com_mcr, sc->sc_mcr);
}
}
sc->sc_dtr = MCR_DTR | MCR_RTS;
} else
sc->sc_dtr = MCR_DTR;
/* and copy to tty */
tp->t_ispeed = t->c_ispeed;
tp->t_ospeed = t->c_ospeed;
oldcflag = tp->t_cflag;
tp->t_cflag = t->c_cflag;
/*
* If DCD is off and MDMBUF is changed, ask the tty layer if we should
* stop the device.
*/
if (!ISSET(sc->sc_msr, MSR_DCD) &&
!ISSET(sc->sc_swflags, COM_SW_SOFTCAR) &&
ISSET(oldcflag, MDMBUF) != ISSET(tp->t_cflag, MDMBUF) &&
(*linesw[tp->t_line].l_modem)(tp, 0) == 0) {
CLR(sc->sc_mcr, sc->sc_dtr);
outb(iobase + com_mcr, sc->sc_mcr);
}
splx(s);
return 0;
}
void
comstart(tp)
struct tty *tp;
{
struct com_softc *sc = comcd.cd_devs[COMUNIT(tp->t_dev)];
int iobase = sc->sc_iobase;
int s;
s = spltty();
if (ISSET(tp->t_state, TS_TTSTOP | TS_BUSY))
goto out;
if (ISSET(tp->t_cflag, CRTSCTS) && !ISSET(sc->sc_msr, MSR_CTS))
goto out;
if (tp->t_outq.c_cc <= tp->t_lowat) {
if (ISSET(tp->t_state, TS_ASLEEP)) {
CLR(tp->t_state, TS_ASLEEP);
wakeup(&tp->t_outq);
}
if (tp->t_outq.c_cc == 0)
goto out;
selwakeup(&tp->t_wsel);
}
SET(tp->t_state, TS_BUSY);
#ifdef COM_ESP
if (ISSET(sc->sc_hwflags, COM_HW_ESP)) {
u_char buffer[1024], *cp = buffer;
int n = q_to_b(&tp->t_outq, cp, sizeof buffer);
if (n > g_dataoutmax) {
g_dataoutmax = n;
printf("Port 0x%08x sent max %d bytes in a buffer.\n",
iobase, g_dataoutmax);
}
do {
outb(iobase + com_data, *cp++);
} while (--n);
} else
#endif
if (ISSET(sc->sc_hwflags, COM_HW_FIFO)) {
u_char buffer[16], *cp = buffer;
int n = q_to_b(&tp->t_outq, cp, sizeof buffer);
do {
outb(iobase + com_data, *cp++);
} while (--n);
} else
outb(iobase + com_data, getc(&tp->t_outq));
out:
splx(s);
}
/*
* Stop output on a line.
*/
void
comstop(tp, flag)
struct tty *tp;
{
int s;
s = spltty();
if (ISSET(tp->t_state, TS_BUSY))
if (!ISSET(tp->t_state, TS_TTSTOP))
SET(tp->t_state, TS_FLUSH);
splx(s);
}
void
comdiag(arg)
void *arg;
{
struct com_softc *sc = arg;
int overflows, floods;
int s;
s = spltty();
sc->sc_errors = 0;
overflows = sc->sc_overflows;
sc->sc_overflows = 0;
floods = sc->sc_floods;
sc->sc_floods = 0;
splx(s);
log(LOG_WARNING, "%s: %d silo overflow%s, %d ibuf overflow%s\n",
sc->sc_dev.dv_xname,
overflows, overflows == 1 ? "" : "s",
floods, floods == 1 ? "" : "s");
}
void
compoll(arg)
void *arg;
{
int unit;
struct com_softc *sc;
struct tty *tp;
register u_char *ibufp;
u_char *ibufend;
register int c;
int s;
static int lsrmap[8] = {
0, TTY_PE,
TTY_FE, TTY_PE|TTY_FE,
TTY_FE, TTY_PE|TTY_FE,
TTY_FE, TTY_PE|TTY_FE
};
s = spltty();
if (comevents == 0) {
splx(s);
goto out;
}
comevents = 0;
splx(s);
for (unit = 0; unit < comcd.cd_ndevs; unit++) {
sc = comcd.cd_devs[unit];
if (sc == 0 || sc->sc_ibufp == sc->sc_ibuf)
continue;
tp = sc->sc_tty;
s = spltty();
ibufp = sc->sc_ibuf;
ibufend = sc->sc_ibufp;
if (ibufp == ibufend) {
splx(s);
continue;
}
sc->sc_ibufp = sc->sc_ibuf = (ibufp == sc->sc_ibufs[0]) ?
sc->sc_ibufs[1] : sc->sc_ibufs[0];
sc->sc_ibufhigh = sc->sc_ibuf + COM_IHIGHWATER;
sc->sc_ibufend = sc->sc_ibuf + COM_IBUFSIZE;
if (tp == 0 || !ISSET(tp->t_state, TS_ISOPEN)) {
splx(s);
continue;
}
if (ISSET(tp->t_cflag, CRTSCTS) &&
!ISSET(sc->sc_mcr, MCR_RTS)) {
/* XXX */
SET(sc->sc_mcr, MCR_RTS);
outb(sc->sc_iobase + com_mcr, sc->sc_mcr);
}
splx(s);
while (ibufp < ibufend) {
c = *ibufp++;
if (*ibufp & LSR_OE) {
sc->sc_overflows++;
if (sc->sc_errors++ == 0)
timeout(comdiag, sc, 60 * hz);
}
/* This is ugly, but fast. */
c |= lsrmap[(*ibufp++ & (LSR_BI|LSR_FE|LSR_PE)) >> 2];
(*linesw[tp->t_line].l_rint)(c, tp);
}
}
out:
timeout(compoll, NULL, 1);
}
int
comintr(arg)
void *arg;
{
struct com_softc *sc = arg;
int iobase = sc->sc_iobase;
struct tty *tp;
u_char lsr, data, msr, delta;
int dataincount = 0;
if (ISSET(inb(iobase + com_iir), IIR_NOPEND))
return (0);
tp = sc->sc_tty;
for (;;) {
lsr = inb(iobase + com_lsr);
if (ISSET(lsr, LSR_RCV_MASK)) {
register u_char *p = sc->sc_ibufp;
comevents = 1;
do {
data = ISSET(lsr, LSR_RXRDY) ?
inb(iobase + com_data) : 0;
if (ISSET(lsr, LSR_RXRDY))
dataincount++;
if (ISSET(lsr, LSR_BI)) {
#ifdef DDB
if (sc->sc_dev.dv_unit == comconsole) {
Debugger();
goto next;
}
#endif
data = '\0';
}
if (p >= sc->sc_ibufend) {
sc->sc_floods++;
if (sc->sc_errors++ == 0)
timeout(comdiag, sc, 60 * hz);
} else {
*p++ = data;
*p++ = lsr;
if (p == sc->sc_ibufhigh &&
ISSET(tp->t_cflag, CRTSCTS)) {
/* XXX */
CLR(sc->sc_mcr, MCR_RTS);
outb(iobase + com_mcr,
sc->sc_mcr);
}
}
next:
lsr = inb(iobase + com_lsr);
} while (ISSET(lsr, LSR_RCV_MASK));
sc->sc_ibufp = p;
}
#if 0
else if (ISSET(lsr, LSR_BI|LSR_FE|LSR_PE|LSR_OE))
printf("weird lsr %02x\n", lsr);
#endif
msr = inb(iobase + com_msr);
if (msr != sc->sc_msr) {
delta = msr ^ sc->sc_msr;
sc->sc_msr = msr;
if (ISSET(delta, MSR_DCD) &&
!ISSET(sc->sc_swflags, COM_SW_SOFTCAR) &&
(*linesw[tp->t_line].l_modem)(tp, ISSET(msr, MSR_DCD)) == 0) {
CLR(sc->sc_mcr, sc->sc_dtr);
outb(iobase + com_mcr, sc->sc_mcr);
}
if (ISSET(delta & msr, MSR_CTS) &&
ISSET(tp->t_cflag, CRTSCTS)) {
/* the line is up and we want to do rts/cts flow control */
(*linesw[tp->t_line].l_start)(tp);
}
}
if (ISSET(lsr, LSR_TXRDY) && ISSET(tp->t_state, TS_BUSY)) {
CLR(tp->t_state, TS_BUSY);
if (ISSET(tp->t_state, TS_FLUSH))
CLR(tp->t_state, TS_FLUSH);
else
(*linesw[tp->t_line].l_start)(tp);
}
if (ISSET(inb(iobase + com_iir), IIR_NOPEND)) {
if (dataincount > g_datainmax) {
g_datainmax = dataincount;
printf("Port 0x%08x received %d max bytes in a buffer.\n",
iobase, g_datainmax);
}
return (1);
}
}
}
/*
* Following are all routines needed for COM to act as console
*/
#include <dev/cons.h>
void
comcnprobe(cp)
struct consdev *cp;
{
if (!comprobe1(CONADDR)) {
cp->cn_pri = CN_DEAD;
return;
}
/* locate the major number */
for (commajor = 0; commajor < nchrdev; commajor++)
if (cdevsw[commajor].d_open == comopen)
break;
/* initialize required fields */
cp->cn_dev = makedev(commajor, CONUNIT);
#ifdef COMCONSOLE
cp->cn_pri = CN_REMOTE; /* Force a serial port console */
#else
cp->cn_pri = CN_NORMAL;
#endif
}
void
comcninit(cp)
struct consdev *cp;
{
cominit(CONUNIT, comdefaultrate);
comconsole = CONUNIT;
comconsinit = 0;
}
cominit(unit, rate)
int unit, rate;
{
int s = splhigh();
int iobase = CONADDR;
u_char stat;
outb(iobase + com_lcr, LCR_DLAB);
rate = comspeed(comdefaultrate);
outb(iobase + com_dlbl, rate);
outb(iobase + com_dlbh, rate >> 8);
outb(iobase + com_lcr, LCR_8BITS);
outb(iobase + com_ier, IER_ERXRDY | IER_ETXRDY);
outb(iobase + com_fifo, FIFO_ENABLE | FIFO_RCV_RST | FIFO_XMT_RST | FIFO_TRIGGER_4);
stat = inb(iobase + com_iir);
splx(s);
}
comcngetc(dev)
dev_t dev;
{
int s = splhigh();
int iobase = CONADDR;
u_char stat, c;
while (!ISSET(stat = inb(iobase + com_lsr), LSR_RXRDY))
;
c = inb(iobase + com_data);
stat = inb(iobase + com_iir);
splx(s);
return c;
}
/*
* Console kernel output character routine.
*/
void
comcnputc(dev, c)
dev_t dev;
int c;
{
int s = splhigh();
int iobase = CONADDR;
u_char stat;
register int timo;
#ifdef KGDB
if (dev != kgdb_dev)
#endif
if (comconsinit == 0) {
(void) cominit(COMUNIT(dev), comdefaultrate);
comconsinit = 1;
}
/* wait for any pending transmission to finish */
timo = 50000;
while (!ISSET(stat = inb(iobase + com_lsr), LSR_TXRDY) && --timo)
;
outb(iobase + com_data, c);
/* wait for this transmission to complete */
timo = 1500000;
while (!ISSET(stat = inb(iobase + com_lsr), LSR_TXRDY) && --timo)
;
/* clear any interrupts generated by this transmission */
stat = inb(iobase + com_iir);
splx(s);
}
void
comcnpollc(dev, on)
dev_t dev;
int on;
{
}
----------------------------------------------------------------------
espreg.h (in /sys/dev/ic/):
----------------------------------------------------------------------
/*-
* Copyright (c) 1995 John M Vinopal.
*
* 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
* notice, this list of conditions and the following disclaimer.
* 2. Redistributions in binary form must reproduce the above copyright
* notice, this list of conditions and the following disclaimer in the
* documentation and/or other materials provided with the distribution.
* 3. Neither the name of the author nor the names of contributors
* may be used to endorse or promote products derived from this software
* without specific prior written permission.
*
* THIS SOFTWARE IS PROVIDED BY THE AUTHOR AND CONTRIBUTORS ``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 AUTHOR OR CONTRIBUTORS BE LIABLE
* FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
* DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
* OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
* HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
* LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
* OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
* SUCH DAMAGE.
*/
#ifndef _ESPREG_H_
#define _ESPREG_H_
/*
* Definitions for Hayes ESP serial cards.
*/
/*
* CMD1 and CMD2 are the command ports, offsets from <esp_iobase>.
*/
#define ESP_CMD1 4
#define ESP_CMD2 5
/*
* STAT1 and STAT2 are to get return values and status bytes;
*/
#define ESP_STATUS1 ESP_CMD1
#define ESP_STATUS2 ESP_CMD2
/*
* Commands. Commands are given by writing the command value to
* ESP_CMD1 and then writing or reading some number of bytes from
* ESP_CMD2 or ESP_STATUS2.
*/
#define ESP_GETTEST 0x01 /* self-test command (1 byte + extras) */
#define ESP_GETDIPS 0x02 /* get on-board DIP switches (1 byte) */
#define ESP_SETFLOWTYPE 0x08 /* set type of flow-control (2 bytes) */
#define ESP_SETRXFLOW 0x0a /* set Rx FIFO flow control levels (4 bytes) */
#define ESP_SETMODE 0x10 /* set board mode (1 byte) */
/* Mode bits (ESP_SETMODE). */
#define ESP_MODE_FIFO 0x02 /* act like a 16550 (compatibility mode) */
#define ESP_MODE_RTS 0x04 /* use RTS hardware flow control */
#define ESP_MODE_SCALE 0x80 /* scale FIFO trigger levels */
/* Flow control type bits (ESP_SETFLOWTYPE). */
#define ESP_FLOW_RTS 0x04 /* cmd1: local Rx sends RTS flow control */
#define ESP_FLOW_CTS 0x10 /* cmd2: local transmitter responds to CTS */
/* Used by ESP_SETRXFLOW. */
#define HIBYTE(w) (((w) >> 8) & 0xff)
#define LOBYTE(w) ((w) & 0xff)
#endif /* !_ESPREG_H_ */
----------------------------------------------------------------------
-----------------------------------------------------------------------------
Michael L. VanLoon michaelv@HeadCandy.com
--< Free your mind and your machine -- NetBSD free un*x >--
NetBSD working ports: 386+PC, Mac 68k, Amiga, HP300, Sun3, Sun4,
DEC PMAX (MIPS), DEC Alpha, PC532
NetBSD ports in progress: VAX, Atari 68k, others...
-----------------------------------------------------------------------------