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NetBSD/sys/arch/atari/dev/ser.c
scw 2963ff5c58 Add l_poll' to struct linesw' and provide an xxxpoll() entry point 
in each tty driver to indirect through it.

This allows tty line-disciplines to handle poll(2) system calls.
2001-05-02 10:32:08 +00:00

1538 lines
34 KiB
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/* $NetBSD: ser.c,v 1.14 2001/05/02 10:32:15 scw Exp $ */
/*-
* Copyright (c) 1997 The NetBSD Foundation, Inc.
* All rights reserved.
*
* This code is derived from software contributed to The NetBSD Foundation
* by Leo Weppelman.
*
* 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 NetBSD
* Foundation, Inc. and its contributors.
* 4. Neither the name of The NetBSD Foundation 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 NETBSD FOUNDATION, INC. 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 FOUNDATION 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.
*/
/*-
* Copyright (c) 1993, 1994, 1995, 1996, 1997
* Charles M. Hannum. All rights reserved.
*
* Interrupt processing and hardware flow control partly based on code from
* Onno van der Linden and Gordon Ross.
*
* 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 Charles M. Hannum.
* 4. The name of the author may not be used to endorse or promote products
* derived from this software without specific prior written permission.
*
* THIS SOFTWARE IS PROVIDED BY THE AUTHOR ``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 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.
*/
/*
* 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
*/
#include "opt_ddb.h"
#include "opt_mbtype.h"
#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 <m68k/asm_single.h>
#include <machine/iomap.h>
#include <machine/mfp.h>
#include <atari/atari/intr.h>
#include <atari/dev/serreg.h>
#if !defined(_MILANHW_)
#include <atari/dev/ym2149reg.h>
#else
/* MILAN has no ym2149 */
#define ym2149_dtr(set) { \
if (set) \
single_inst_bset_b(MFP->mf_gpip, 0x08); \
else single_inst_bclr_b(MFP->mf_gpip, 0x08); \
}
#define ym2149_rts(set) { \
if (set) \
single_inst_bset_b(MFP->mf_gpip, 0x01); \
else single_inst_bclr_b(MFP->mf_gpip, 0x01); \
}
#endif /* _MILANHW_ */
/* #define SER_DEBUG */
#define SERUNIT(x) (minor(x) & 0x7ffff)
#define SERDIALOUT(x) (minor(x) & 0x80000)
/* XXX */
#define CONSBAUD 9600
#define CONSCFLAG TTYDEF_CFLAG
/* end XXX */
/* Macros to clear/set/test flags. */
#define SET(t, f) (t) |= (f)
#define CLR(t, f) (t) &= ~(f)
#define ISSET(t, f) ((t) & (f))
#define splserial() spl6()
/* Buffer size for character buffer */
#define RXBUFSIZE 2048 /* More than enough.. */
#define RXBUFMASK (RXBUFSIZE-1) /* Only iff previous is a power of 2 */
#define RXHIWAT (RXBUFSIZE >> 2)
struct ser_softc {
struct device sc_dev;
struct tty *sc_tty;
struct callout sc_diag_ch;
int sc_overflows;
int sc_floods;
int sc_errors;
u_char sc_hwflags;
u_char sc_swflags;
int sc_ospeed; /* delay + timer-d data */
u_char sc_imra;
u_char sc_imrb;
u_char sc_ucr; /* Uart control */
u_char sc_msr; /* Modem status */
u_char sc_tsr; /* Tranceiver status */
u_char sc_rsr; /* Receiver status */
u_char sc_mcr; /* (Pseudo) Modem ctrl. */
u_char sc_msr_delta;
u_char sc_msr_mask;
u_char sc_mcr_active;
u_char sc_mcr_dtr, sc_mcr_rts, sc_msr_cts, sc_msr_dcd;
int sc_r_hiwat;
volatile u_int sc_rbget;
volatile u_int sc_rbput;
volatile u_int sc_rbavail;
u_char sc_rbuf[RXBUFSIZE];
u_char sc_lbuf[RXBUFSIZE];
volatile u_char sc_rx_blocked;
volatile u_char sc_rx_ready;
volatile u_char sc_tx_busy;
volatile u_char sc_tx_done;
volatile u_char sc_tx_stopped;
volatile u_char sc_st_check;
u_char *sc_tba;
int sc_tbc;
int sc_heldtbc;
volatile u_char sc_heldchange;
};
/*
* For sc_hwflags:
*/
#define SER_HW_CONSOLE 0x01
cdev_decl(ser);
void ser_break __P((struct ser_softc *, int));
void ser_hwiflow __P((struct ser_softc *, int));
void ser_iflush __P((struct ser_softc *));
void ser_loadchannelregs __P((struct ser_softc *));
void ser_modem __P((struct ser_softc *, int));
void serdiag __P((void *));
int serhwiflow __P((struct tty *, int));
void serinit __P((int));
void serinitcons __P((int));
int baud;
int sermintr __P((void *));
int sertrintr __P((void *));
int serparam __P((struct tty *, struct termios *));
void serstart __P((struct tty *));
struct consdev;
void sercnprobe __P((struct consdev *));
void sercninit __P((struct consdev *));
int sercngetc __P((dev_t));
void sercnputc __P((dev_t, int));
void sercnpollc __P((dev_t, int));
static void sermsrint __P((struct ser_softc *, struct tty*));
static void serrxint __P((struct ser_softc *, struct tty*));
static void ser_shutdown __P((struct ser_softc *));
static int serspeed __P((long));
static void sersoft __P((void *));
static void sertxint __P((struct ser_softc *, struct tty*));
static volatile int ser_softintr_scheduled = 0;
static int sermajor;
/*
* Autoconfig stuff
*/
static void serattach __P((struct device *, struct device *, void *));
static int sermatch __P((struct device *, struct cfdata *, void *));
struct cfattach ser_ca = {
sizeof(struct ser_softc), sermatch, serattach
};
extern struct cfdriver ser_cd;
/*ARGSUSED*/
static int
sermatch(pdp, cfp, auxp)
struct device *pdp;
struct cfdata *cfp;
void *auxp;
{
static int ser_matched = 0;
/* Match at most one ser unit */
if (strcmp((char *)auxp, "ser") || ser_matched)
return 0;
ser_matched = 1;
return 1;
}
/*ARGSUSED*/
static void
serattach(pdp, dp, auxp)
struct device *pdp, *dp;
void *auxp;
{
struct ser_softc *sc = (void *)dp;
if (intr_establish(1, USER_VEC, 0, (hw_ifun_t)sermintr, sc) == NULL)
printf("serattach: Can't establish interrupt (1)\n");
if (intr_establish(2, USER_VEC, 0, (hw_ifun_t)sermintr, sc) == NULL)
printf("serattach: Can't establish interrupt (2)\n");
if (intr_establish(14, USER_VEC, 0, (hw_ifun_t)sermintr, sc) == NULL)
printf("serattach: Can't establish interrupt (14)\n");
if (intr_establish(9, USER_VEC, 0, (hw_ifun_t)sertrintr, sc) == NULL)
printf("serattach: Can't establish interrupt (9)\n");
if (intr_establish(10, USER_VEC, 0, (hw_ifun_t)sertrintr, sc) == NULL)
printf("serattach: Can't establish interrupt (10)\n");
if (intr_establish(11, USER_VEC, 0, (hw_ifun_t)sertrintr, sc) == NULL)
printf("serattach: Can't establish interrupt (11)\n");
if (intr_establish(12, USER_VEC, 0, (hw_ifun_t)sertrintr, sc) == NULL)
printf("serattach: Can't establish interrupt (12)\n");
ym2149_rts(1);
ym2149_dtr(1);
/*
* Enable but mask interrupts...
* XXX: Look at edge-sensitivity for DCD/CTS interrupts.
*/
MFP->mf_ierb |= IB_SCTS|IB_SDCD;
MFP->mf_iera |= IA_RRDY|IA_RERR|IA_TRDY|IA_TERR;
MFP->mf_imrb &= ~(IB_SCTS|IB_SDCD);
MFP->mf_imra &= ~(IA_RRDY|IA_RERR|IA_TRDY|IA_TERR);
callout_init(&sc->sc_diag_ch);
#ifdef SERCONSOLE
/*
* Activate serial console when DCD present...
*/
if (!(MFP->mf_gpip & MCR_DCD))
SET(sc->sc_hwflags, SER_HW_CONSOLE);
#endif /* SERCONSOLE */
printf("\n");
if (ISSET(sc->sc_hwflags, SER_HW_CONSOLE)) {
serinit(CONSBAUD);
printf("%s: console\n", sc->sc_dev.dv_xname);
}
}
#ifdef SER_DEBUG
void serstatus __P((struct ser_softc *, char *));
void
serstatus(sc, str)
struct ser_softc *sc;
char *str;
{
struct tty *tp = sc->sc_tty;
printf("%s: %s %sclocal %sdcd %sts_carr_on %sdtr %stx_stopped\n",
sc->sc_dev.dv_xname, str,
ISSET(tp->t_cflag, CLOCAL) ? "+" : "-",
ISSET(sc->sc_msr, MCR_DCD) ? "+" : "-",
ISSET(tp->t_state, TS_CARR_ON) ? "+" : "-",
ISSET(sc->sc_mcr, MCR_DTR) ? "+" : "-",
sc->sc_tx_stopped ? "+" : "-");
printf("%s: %s %scrtscts %scts %sts_ttstop %srts %srx_blocked\n",
sc->sc_dev.dv_xname, str,
ISSET(tp->t_cflag, CRTSCTS) ? "+" : "-",
ISSET(sc->sc_msr, MCR_CTS) ? "+" : "-",
ISSET(tp->t_state, TS_TTSTOP) ? "+" : "-",
ISSET(sc->sc_mcr, MCR_RTS) ? "+" : "-",
sc->sc_rx_blocked ? "+" : "-");
}
#endif /* SER_DEBUG */
int
seropen(dev, flag, mode, p)
dev_t dev;
int flag, mode;
struct proc *p;
{
int unit = SERUNIT(dev);
struct ser_softc *sc;
struct tty *tp;
int s, s2;
int error = 0;
if (unit >= ser_cd.cd_ndevs)
return (ENXIO);
sc = ser_cd.cd_devs[unit];
if (!sc)
return (ENXIO);
if (!sc->sc_tty) {
tp = sc->sc_tty = ttymalloc();
tty_attach(tp);
} else
tp = sc->sc_tty;
if (ISSET(tp->t_state, TS_ISOPEN) &&
ISSET(tp->t_state, TS_XCLUDE) &&
p->p_ucred->cr_uid != 0)
return (EBUSY);
s = spltty();
/*
* Do the following if this is a first open.
*/
if (!ISSET(tp->t_state, TS_ISOPEN) && tp->t_wopen == 0) {
struct termios t;
/* Turn on interrupts. */
sc->sc_imra = IA_RRDY|IA_RERR|IA_TRDY|IA_TERR;
sc->sc_imrb = IB_SCTS|IB_SDCD;
single_inst_bset_b(MFP->mf_imra, sc->sc_imra);
single_inst_bset_b(MFP->mf_imrb, sc->sc_imrb);
/* Fetch the current modem control status, needed later. */
sc->sc_msr = ~MFP->mf_gpip & (IO_SDCD|IO_SCTS|IO_SRI);
/* Add some entry points needed by the tty layer. */
tp->t_oproc = serstart;
tp->t_param = serparam;
tp->t_hwiflow = serhwiflow;
tp->t_dev = dev;
/*
* Initialize the termios status to the defaults. Add in the
* sticky bits from TIOCSFLAGS.
*/
t.c_ispeed = 0;
if (ISSET(sc->sc_hwflags, SER_HW_CONSOLE)) {
t.c_ospeed = CONSBAUD;
t.c_cflag = CONSCFLAG;
}
else {
t.c_ospeed = TTYDEF_SPEED;
t.c_cflag = TTYDEF_CFLAG;
}
if (ISSET(sc->sc_swflags, TIOCFLAG_CLOCAL))
SET(t.c_cflag, CLOCAL);
if (ISSET(sc->sc_swflags, TIOCFLAG_CRTSCTS))
SET(t.c_cflag, CRTSCTS);
if (ISSET(sc->sc_swflags, TIOCFLAG_MDMBUF))
SET(t.c_cflag, MDMBUF);
tp->t_iflag = TTYDEF_IFLAG;
tp->t_oflag = TTYDEF_OFLAG;
tp->t_lflag = TTYDEF_LFLAG;
ttychars(tp);
(void) serparam(tp, &t);
ttsetwater(tp);
s2 = splserial();
/*
* Turn on DTR. We must always do this, even if carrier is not
* present, because otherwise we'd have to use TIOCSDTR
* immediately after setting CLOCAL. We will drop DTR only on
* the next high-low transition of DCD, or by explicit request.
*/
ser_modem(sc, 1);
/* Clear the input ring, and unblock. */
sc->sc_rbput = sc->sc_rbget = 0;
sc->sc_rbavail = RXBUFSIZE;
ser_iflush(sc);
sc->sc_rx_blocked = 0;
ser_hwiflow(sc, 0);
#ifdef SER_DEBUG
serstatus(sc, "seropen ");
#endif
splx(s2);
}
splx(s);
error = ttyopen(tp, SERDIALOUT(dev), ISSET(flag, O_NONBLOCK));
if (error)
goto bad;
error = (*tp->t_linesw->l_open)(dev, tp);
if (error)
goto bad;
return (0);
bad:
if (!ISSET(tp->t_state, TS_ISOPEN) && tp->t_wopen == 0) {
/*
* We failed to open the device, and nobody else had it opened.
* Clean up the state as appropriate.
*/
ser_shutdown(sc);
}
return (error);
}
int
serclose(dev, flag, mode, p)
dev_t dev;
int flag, mode;
struct proc *p;
{
int unit = SERUNIT(dev);
struct ser_softc *sc = ser_cd.cd_devs[unit];
struct tty *tp = sc->sc_tty;
/* XXX This is for cons.c. */
if (!ISSET(tp->t_state, TS_ISOPEN))
return (0);
(*tp->t_linesw->l_close)(tp, flag);
ttyclose(tp);
if (!ISSET(tp->t_state, TS_ISOPEN) && tp->t_wopen == 0) {
/*
* Although we got a last close, the device may still be in
* use; e.g. if this was the dialout node, and there are still
* processes waiting for carrier on the non-dialout node.
*/
ser_shutdown(sc);
}
return (0);
}
int
serread(dev, uio, flag)
dev_t dev;
struct uio *uio;
int flag;
{
struct ser_softc *sc = ser_cd.cd_devs[SERUNIT(dev)];
struct tty *tp = sc->sc_tty;
return ((*tp->t_linesw->l_read)(tp, uio, flag));
}
int
serwrite(dev, uio, flag)
dev_t dev;
struct uio *uio;
int flag;
{
struct ser_softc *sc = ser_cd.cd_devs[SERUNIT(dev)];
struct tty *tp = sc->sc_tty;
return ((*tp->t_linesw->l_write)(tp, uio, flag));
}
int
serpoll(dev, events, p)
dev_t dev;
int events;
struct proc *p;
{
struct ser_softc *sc = ser_cd.cd_devs[SERUNIT(dev)];
struct tty *tp = sc->sc_tty;
return ((*tp->t_linesw->l_poll)(tp, events, p));
}
struct tty *
sertty(dev)
dev_t dev;
{
struct ser_softc *sc = ser_cd.cd_devs[SERUNIT(dev)];
struct tty *tp = sc->sc_tty;
return (tp);
}
int
serioctl(dev, cmd, data, flag, p)
dev_t dev;
u_long cmd;
caddr_t data;
int flag;
struct proc *p;
{
int unit = SERUNIT(dev);
struct ser_softc *sc = ser_cd.cd_devs[unit];
struct tty *tp = sc->sc_tty;
int error;
error = (*tp->t_linesw->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:
ser_break(sc, 1);
break;
case TIOCCBRK:
ser_break(sc, 0);
break;
case TIOCSDTR:
ser_modem(sc, 1);
break;
case TIOCCDTR:
ser_modem(sc, 0);
break;
case TIOCGFLAGS:
*(int *)data = sc->sc_swflags;
break;
case TIOCSFLAGS:
error = suser(p->p_ucred, &p->p_acflag);
if (error)
return (error);
sc->sc_swflags = *(int *)data;
break;
case TIOCMSET:
case TIOCMBIS:
case TIOCMBIC:
case TIOCMGET:
default:
return (ENOTTY);
}
#ifdef SER_DEBUG
serstatus(sc, "serioctl ");
#endif
return (0);
}
void
ser_break(sc, onoff)
struct ser_softc *sc;
int onoff;
{
int s;
s = splserial();
if (onoff)
SET(sc->sc_tsr, TSR_SBREAK);
else
CLR(sc->sc_tsr, TSR_SBREAK);
if (!sc->sc_heldchange) {
if (sc->sc_tx_busy) {
sc->sc_heldtbc = sc->sc_tbc;
sc->sc_tbc = 0;
sc->sc_heldchange = 1;
} else
ser_loadchannelregs(sc);
}
splx(s);
}
void
ser_modem(sc, onoff)
struct ser_softc *sc;
int onoff;
{
int s;
s = splserial();
if (onoff)
SET(sc->sc_mcr, sc->sc_mcr_dtr);
else
CLR(sc->sc_mcr, sc->sc_mcr_dtr);
if (!sc->sc_heldchange) {
if (sc->sc_tx_busy) {
sc->sc_heldtbc = sc->sc_tbc;
sc->sc_tbc = 0;
sc->sc_heldchange = 1;
} else
ser_loadchannelregs(sc);
}
splx(s);
}
int
serparam(tp, t)
struct tty *tp;
struct termios *t;
{
struct ser_softc *sc = ser_cd.cd_devs[SERUNIT(tp->t_dev)];
int ospeed = serspeed(t->c_ospeed);
u_char ucr;
int s;
/* check requested parameters */
if (ospeed < 0)
return (EINVAL);
if (t->c_ispeed && t->c_ispeed != t->c_ospeed)
return (EINVAL);
sc->sc_rsr = RSR_ENAB;
sc->sc_tsr = TSR_ENAB;
ucr = UCR_CLKDIV;
switch (ISSET(t->c_cflag, CSIZE)) {
case CS5:
SET(ucr, UCR_5BITS);
break;
case CS6:
SET(ucr, UCR_6BITS);
break;
case CS7:
SET(ucr, UCR_7BITS);
break;
case CS8:
SET(ucr, UCR_8BITS);
break;
}
if (ISSET(t->c_cflag, PARENB)) {
SET(ucr, UCR_PENAB);
if (!ISSET(t->c_cflag, PARODD))
SET(ucr, UCR_PEVEN);
}
if (ISSET(t->c_cflag, CSTOPB))
SET(ucr, UCR_STOPB2);
else
SET(ucr, UCR_STOPB1);
s = splserial();
sc->sc_ucr = ucr;
/*
* For the console, always force CLOCAL and !HUPCL, so that the port
* is always active.
*/
if (ISSET(sc->sc_swflags, TIOCFLAG_SOFTCAR) ||
ISSET(sc->sc_hwflags, SER_HW_CONSOLE)) {
SET(t->c_cflag, CLOCAL);
CLR(t->c_cflag, HUPCL);
}
/*
* If we're not in a mode that assumes a connection is present, then
* ignore carrier changes.
*/
if (ISSET(t->c_cflag, CLOCAL | MDMBUF))
sc->sc_msr_dcd = 0;
else
sc->sc_msr_dcd = MCR_DCD;
/*
* Set the flow control pins depending on the current flow control
* mode.
*/
if (ISSET(t->c_cflag, CRTSCTS)) {
sc->sc_mcr_dtr = MCR_DTR;
sc->sc_mcr_rts = MCR_RTS;
sc->sc_msr_cts = MCR_CTS;
sc->sc_r_hiwat = RXHIWAT;
} else if (ISSET(t->c_cflag, MDMBUF)) {
/*
* For DTR/DCD flow control, make sure we don't toggle DTR for
* carrier detection.
*/
sc->sc_mcr_dtr = 0;
sc->sc_mcr_rts = MCR_DTR;
sc->sc_msr_cts = MCR_DCD;
sc->sc_r_hiwat = RXHIWAT;
} else {
/*
* If no flow control, then always set RTS. This will make
* the other side happy if it mistakenly thinks we're doing
* RTS/CTS flow control.
*/
sc->sc_mcr_dtr = MCR_DTR | MCR_RTS;
sc->sc_mcr_rts = 0;
sc->sc_msr_cts = 0;
sc->sc_r_hiwat = 0;
if (ISSET(sc->sc_mcr, MCR_DTR))
SET(sc->sc_mcr, MCR_RTS);
else
CLR(sc->sc_mcr, MCR_RTS);
}
sc->sc_msr_mask = sc->sc_msr_cts | sc->sc_msr_dcd;
#if 0
if (ospeed == 0)
CLR(sc->sc_mcr, sc->sc_mcr_dtr);
else
SET(sc->sc_mcr, sc->sc_mcr_dtr);
#endif
sc->sc_ospeed = ospeed;
/* and copy to tty */
tp->t_ispeed = 0;
tp->t_ospeed = t->c_ospeed;
tp->t_cflag = t->c_cflag;
if (!sc->sc_heldchange) {
if (sc->sc_tx_busy) {
sc->sc_heldtbc = sc->sc_tbc;
sc->sc_tbc = 0;
sc->sc_heldchange = 1;
} else
ser_loadchannelregs(sc);
}
splx(s);
/*
* Update the tty layer's idea of the carrier bit, in case we changed
* CLOCAL or MDMBUF. We don't hang up here; we only do that if we
* lose carrier while carrier detection is on.
*/
(void) (*tp->t_linesw->l_modem)(tp, ISSET(sc->sc_msr, MCR_DCD));
#ifdef SER_DEBUG
serstatus(sc, "serparam ");
#endif
/* XXXXX FIX ME */
/* Block or unblock as needed. */
if (!ISSET(t->c_cflag, CHWFLOW)) {
if (sc->sc_rx_blocked) {
sc->sc_rx_blocked = 0;
ser_hwiflow(sc, 0);
}
if (sc->sc_tx_stopped) {
sc->sc_tx_stopped = 0;
serstart(tp);
}
} else {
#if 0
sermsrint(sc, tp);
#endif
}
return (0);
}
void
ser_iflush(sc)
struct ser_softc *sc;
{
u_char tmp;
/* flush any pending I/O */
while (ISSET(MFP->mf_rsr, RSR_CIP|RSR_BFULL))
tmp = MFP->mf_udr;
}
void
ser_loadchannelregs(sc)
struct ser_softc *sc;
{
/* XXXXX necessary? */
ser_iflush(sc);
/*
* No interrupts please...
*/
if((MFP->mf_imra & (IA_RRDY|IA_RERR|IA_TRDY|IA_TERR)) != sc->sc_imra) {
printf("loadchannelregs: mf_imra: %x sc_imra: %x\n", (u_int)MFP->mf_imra,
(u_int)sc->sc_imra);
}
if((MFP->mf_imrb & (IB_SCTS|IB_SDCD)) != sc->sc_imrb) {
printf("loadchannelregs: mf_imrb: %x sc_imrb: %x\n", (u_int)MFP->mf_imrb,
(u_int)sc->sc_imrb);
}
single_inst_bclr_b(MFP->mf_imra, IA_RRDY|IA_RERR|IA_TRDY|IA_TERR);
single_inst_bclr_b(MFP->mf_imrb, IB_SCTS|IB_SDCD);
MFP->mf_ucr = sc->sc_ucr;
MFP->mf_rsr = sc->sc_rsr;
MFP->mf_tsr = sc->sc_tsr;
single_inst_bclr_b(MFP->mf_tcdcr, 0x07);
MFP->mf_tddr = sc->sc_ospeed;
single_inst_bset_b(MFP->mf_tcdcr, (sc->sc_ospeed >> 8) & 0x0f);
sc->sc_mcr_active = sc->sc_mcr;
if (machineid & ATARI_HADES) {
/* PCB fault, wires exchanged..... */
ym2149_rts(!(sc->sc_mcr_active & MCR_DTR));
ym2149_dtr(!(sc->sc_mcr_active & MCR_RTS));
}
else {
ym2149_rts(!(sc->sc_mcr_active & MCR_RTS));
ym2149_dtr(!(sc->sc_mcr_active & MCR_DTR));
}
single_inst_bset_b(MFP->mf_imra, sc->sc_imra);
single_inst_bset_b(MFP->mf_imrb, sc->sc_imrb);
}
int
serhwiflow(tp, block)
struct tty *tp;
int block;
{
struct ser_softc *sc = ser_cd.cd_devs[SERUNIT(tp->t_dev)];
int s;
if (sc->sc_mcr_rts == 0)
return (0);
s = splserial();
if (block) {
/*
* The tty layer is asking us to block input.
* If we already did it, just return TRUE.
*/
if (sc->sc_rx_blocked)
goto out;
sc->sc_rx_blocked = 1;
} else {
/*
* The tty layer is asking us to resume input.
* The input ring is always empty by now.
*/
sc->sc_rx_blocked = 0;
}
ser_hwiflow(sc, block);
out:
splx(s);
return (1);
}
/*
* (un)block input via hw flowcontrol
*/
void
ser_hwiflow(sc, block)
struct ser_softc *sc;
int block;
{
if (sc->sc_mcr_rts == 0)
return;
if (block) {
CLR(sc->sc_mcr, sc->sc_mcr_rts);
CLR(sc->sc_mcr_active, sc->sc_mcr_rts);
} else {
SET(sc->sc_mcr, sc->sc_mcr_rts);
SET(sc->sc_mcr_active, sc->sc_mcr_rts);
}
if (machineid & ATARI_HADES) {
/* PCB fault, wires exchanged..... */
ym2149_dtr(sc->sc_mcr_active & MCR_RTS);
}
else {
ym2149_rts(sc->sc_mcr_active & MCR_RTS);
}
}
void
serstart(tp)
struct tty *tp;
{
struct ser_softc *sc = ser_cd.cd_devs[SERUNIT(tp->t_dev)];
int s;
s = spltty();
if (ISSET(tp->t_state, TS_BUSY))
goto out;
if (ISSET(tp->t_state, TS_TIMEOUT | TS_TTSTOP))
goto stopped;
if (sc->sc_tx_stopped)
goto stopped;
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);
}
selwakeup(&tp->t_wsel);
if (tp->t_outq.c_cc == 0)
goto stopped;
}
/* Grab the first contiguous region of buffer space. */
{
u_char *tba;
int tbc;
tba = tp->t_outq.c_cf;
tbc = ndqb(&tp->t_outq, 0);
(void)splserial();
sc->sc_tba = tba;
sc->sc_tbc = tbc;
}
SET(tp->t_state, TS_BUSY);
sc->sc_tx_busy = 1;
/* Enable transmit completion interrupts if necessary. */
if (!ISSET(sc->sc_imra, IA_TRDY)) {
SET(sc->sc_imra, IA_TRDY|IA_TERR);
single_inst_bset_b(MFP->mf_imra, IA_TRDY|IA_TERR);
}
/* Output the first char */
MFP->mf_udr = *sc->sc_tba;
sc->sc_tbc --;
sc->sc_tba ++;
splx(s);
return;
stopped:
/* Disable transmit completion interrupts if necessary. */
if (ISSET(sc->sc_imra, IA_TRDY)) {
CLR(sc->sc_imra, IA_TRDY|IA_TERR);
single_inst_bclr_b(MFP->mf_imra, IA_TRDY|IA_TERR);
}
out:
splx(s);
return;
}
/*
* Stop output on a line.
*/
void
serstop(tp, flag)
struct tty *tp;
int flag;
{
struct ser_softc *sc = ser_cd.cd_devs[SERUNIT(tp->t_dev)];
int s;
s = splserial();
if (ISSET(tp->t_state, TS_BUSY)) {
/* Stop transmitting at the next chunk. */
sc->sc_tbc = 0;
sc->sc_heldtbc = 0;
if (!ISSET(tp->t_state, TS_TTSTOP))
SET(tp->t_state, TS_FLUSH);
}
splx(s);
}
void
serdiag(arg)
void *arg;
{
struct ser_softc *sc = arg;
int overflows, floods;
int s;
s = splserial();
overflows = sc->sc_overflows;
sc->sc_overflows = 0;
floods = sc->sc_floods;
sc->sc_floods = 0;
sc->sc_errors = 0;
splx(s);
log(LOG_WARNING,
"%s: %d silo overflow%s, %d ibuf flood%s\n",
sc->sc_dev.dv_xname,
overflows, overflows == 1 ? "" : "s",
floods, floods == 1 ? "" : "s");
}
static
void ser_shutdown(sc)
struct ser_softc *sc;
{
int s;
struct tty *tp = sc->sc_tty;
s = splserial();
/* If we were asserting flow control, then deassert it. */
sc->sc_rx_blocked = 1;
ser_hwiflow(sc, 1);
/* Clear any break condition set with TIOCSBRK. */
ser_break(sc, 0);
/*
* Hang up if necessary. Wait a bit, so the other side has time to
* notice even if we immediately open the port again.
*/
if (ISSET(tp->t_cflag, HUPCL)) {
ser_modem(sc, 0);
(void) tsleep(sc, TTIPRI, ttclos, hz);
}
/* Turn off interrupts. */
CLR(sc->sc_imra, IA_RRDY|IA_RERR|IA_TRDY|IA_TERR);
CLR(sc->sc_imrb, IB_SCTS|IB_SDCD);
single_inst_bclr_b(MFP->mf_imrb, IB_SCTS|IB_SDCD);
single_inst_bclr_b(MFP->mf_imra, IA_RRDY|IA_RERR|IA_TRDY|IA_TERR);
splx(s);
}
static void
serrxint(sc, tp)
struct ser_softc *sc;
struct tty *tp;
{
u_int get, cc, scc;
int code;
u_char rsr;
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
};
get = sc->sc_rbget;
scc = cc = RXBUFSIZE - sc->sc_rbavail;
if (cc == RXBUFSIZE) {
sc->sc_floods++;
if (sc->sc_errors++ == 0)
callout_reset(&sc->sc_diag_ch, 60 * hz, serdiag, sc);
}
while (cc--) {
rsr = sc->sc_lbuf[get];
if (ISSET(rsr, RSR_BREAK)) {
#ifdef DDB
if (ISSET(sc->sc_hwflags, SER_HW_CONSOLE))
Debugger();
#endif
}
else if (ISSET(rsr, RSR_OERR)) {
sc->sc_overflows++;
if (sc->sc_errors++ == 0)
callout_reset(&sc->sc_diag_ch, 60 * hz,
serdiag, sc);
}
code = sc->sc_rbuf[get] |
lsrmap[(rsr & (RSR_BREAK|RSR_FERR|RSR_PERR)) >> 3];
(*tp->t_linesw->l_rint)(code, tp);
get = (get + 1) & RXBUFMASK;
}
sc->sc_rbget = get;
s = splserial();
sc->sc_rbavail += scc;
/*
* Buffers should be ok again, release possible block, but only if the
* tty layer isn't blocking too.
*/
if (sc->sc_rx_blocked && !ISSET(tp->t_state, TS_TBLOCK)) {
sc->sc_rx_blocked = 0;
ser_hwiflow(sc, 0);
}
splx(s);
}
static void
sertxint(sc, tp)
struct ser_softc *sc;
struct tty *tp;
{
CLR(tp->t_state, TS_BUSY);
if (ISSET(tp->t_state, TS_FLUSH))
CLR(tp->t_state, TS_FLUSH);
else
ndflush(&tp->t_outq, (int)(sc->sc_tba - tp->t_outq.c_cf));
(*tp->t_linesw->l_start)(tp);
}
static void
sermsrint(sc, tp)
struct ser_softc *sc;
struct tty *tp;
{
u_char msr, delta;
int s;
s = splserial();
msr = sc->sc_msr;
delta = sc->sc_msr_delta;
sc->sc_msr_delta = 0;
splx(s);
if (ISSET(delta, sc->sc_msr_dcd)) {
/*
* Inform the tty layer that carrier detect changed.
*/
(void) (*tp->t_linesw->l_modem)(tp, ISSET(msr, MCR_DCD));
}
if (ISSET(delta, sc->sc_msr_cts)) {
/* Block or unblock output according to flow control. */
if (ISSET(msr, sc->sc_msr_cts)) {
sc->sc_tx_stopped = 0;
(*tp->t_linesw->l_start)(tp);
} else {
sc->sc_tx_stopped = 1;
serstop(tp, 0);
}
}
#ifdef SER_DEBUG
serstatus(sc, "sermsrint");
#endif
}
void
sersoft(arg)
void *arg;
{
struct ser_softc *sc = arg;
struct tty *tp;
ser_softintr_scheduled = 0;
tp = sc->sc_tty;
if (tp == NULL)
return;
if (!ISSET(tp->t_state, TS_ISOPEN) && (tp->t_wopen == 0))
return;
if (sc->sc_rx_ready) {
sc->sc_rx_ready = 0;
serrxint(sc, tp);
}
if (sc->sc_st_check) {
sc->sc_st_check = 0;
sermsrint(sc, tp);
}
if (sc->sc_tx_done) {
sc->sc_tx_done = 0;
sertxint(sc, tp);
}
}
int
sermintr(arg)
void *arg;
{
struct ser_softc *sc = arg;
u_char msr, delta;
msr = ~MFP->mf_gpip;
delta = msr ^ sc->sc_msr;
sc->sc_msr = sc->sc_msr & ~(MCR_CTS|MCR_DCD|MCR_RI);
sc->sc_msr |= msr & (MCR_CTS|MCR_DCD|MCR_RI);
if (ISSET(delta, sc->sc_msr_mask)) {
sc->sc_msr_delta |= delta;
/*
* Stop output immediately if we lose the output
* flow control signal or carrier detect.
*/
if (ISSET(~msr, sc->sc_msr_mask)) {
sc->sc_tbc = 0;
sc->sc_heldtbc = 0;
#ifdef SER_DEBUG
serstatus(sc, "sermintr ");
#endif
}
sc->sc_st_check = 1;
}
if (!ser_softintr_scheduled)
add_sicallback((si_farg)sersoft, sc, 0);
return 1;
}
int
sertrintr(arg)
void *arg;
{
struct ser_softc *sc = arg;
u_int put, cc;
u_char rsr, tsr;
put = sc->sc_rbput;
cc = sc->sc_rbavail;
rsr = MFP->mf_rsr;
if (ISSET(rsr, RSR_BFULL|RSR_BREAK)) {
for (; ISSET(rsr, RSR_BFULL|RSR_BREAK) && cc > 0; cc--) {
sc->sc_rbuf[put] = MFP->mf_udr;
sc->sc_lbuf[put] = rsr;
put = (put + 1) & RXBUFMASK;
if ((rsr & RSR_BREAK) && (MFP->mf_rsr & RSR_BREAK))
rsr = 0;
else rsr = MFP->mf_rsr;
}
/*
* Current string of incoming characters ended because
* no more data was available. Schedule a receive event
* if any data was received. Drop any characters that
* we couldn't handle.
*/
sc->sc_rbput = put;
sc->sc_rbavail = cc;
sc->sc_rx_ready = 1;
/*
* See if we are in danger of overflowing a buffer. If
* so, use hardware flow control to ease the pressure.
*/
if (sc->sc_rx_blocked == 0 &&
cc < sc->sc_r_hiwat) {
sc->sc_rx_blocked = 1;
ser_hwiflow(sc, 1);
}
/*
* If we're out of space, throw away any further input.
*/
if (!cc) {
while (ISSET(rsr, RSR_BFULL|RSR_BREAK)) {
rsr = MFP->mf_udr;
rsr = MFP->mf_rsr;
}
}
}
/*
* Done handling any receive interrupts. See if data can be
* transmitted as well. Schedule tx done event if no data left
* and tty was marked busy.
*/
tsr = MFP->mf_tsr;
if (ISSET(tsr, TSR_BE)) {
/*
* If we've delayed a parameter change, do it now, and restart
* output.
*/
if (sc->sc_heldchange) {
ser_loadchannelregs(sc);
sc->sc_heldchange = 0;
sc->sc_tbc = sc->sc_heldtbc;
sc->sc_heldtbc = 0;
}
/* Output the next character, if any. */
if (sc->sc_tbc > 0) {
MFP->mf_udr = *sc->sc_tba;
sc->sc_tbc --;
sc->sc_tba ++;
} else if (sc->sc_tx_busy) {
sc->sc_tx_busy = 0;
sc->sc_tx_done = 1;
}
}
if (!ser_softintr_scheduled)
add_sicallback((si_farg)sersoft, sc, 0);
return 1;
}
static int
serspeed(speed)
long speed;
{
#define divrnd(n, q) (((n)*2/(q)+1)/2) /* divide and round off */
int div, x, err;
if (speed <= 0)
return (-1);
for (div = 4; div <= 64; div *= 4) {
x = divrnd((SER_FREQ / div), speed);
/*
* The value must fit in the timer-d dataregister. If
* not, try another delay-mode.
*/
if ((x/2) > 255)
continue;
/*
* Baudrate to high for the interface or cannot be made
* within tolerance.
*/
if (x <= 0)
return (-1);
err = divrnd((SER_FREQ / div) * 1000, speed * x) - 1000;
if (err < 0)
err = -err;
if (err > SER_TOLERANCE)
continue;
/*
* Translate 'div' to delay-code
*/
if (div == 4)
div = 1;
else if (div == 16)
div = 3;
else if (div == 64)
div = 5;
return ((x/2) | (div << 8));
}
return (-1);
#undef divrnd(n, q)
}
/*
* Following are all routines needed for SER to act as console
*/
#include <dev/cons.h>
void
sercnprobe(cp)
struct consdev *cp;
{
/*
* Activate serial console when DCD present...
*/
if (MFP->mf_gpip & MCR_DCD) {
cp->cn_pri = CN_DEAD;
return;
}
for (sermajor = 0; sermajor < nchrdev; sermajor++)
if (cdevsw[sermajor].d_open == seropen)
break;
/* initialize required fields */
cp->cn_dev = makedev(sermajor, 0); /* XXX: LWP What unit? */
#ifdef SERCONSOLE
cp->cn_pri = CN_REMOTE; /* Force a serial port console */
#else
cp->cn_pri = CN_NORMAL;
#endif
}
void
sercninit(cp)
struct consdev *cp;
{
serinitcons(CONSBAUD);
}
/*
* Initialize UART to known state.
*/
void
serinit(baud)
int baud;
{
int ospeed = serspeed(baud);
MFP->mf_ucr = UCR_CLKDIV|UCR_8BITS|UCR_STOPB1;
MFP->mf_rsr = RSR_ENAB;
MFP->mf_tsr = TSR_ENAB;
single_inst_bclr_b(MFP->mf_tcdcr, 0x07);
MFP->mf_tddr = ospeed;
single_inst_bset_b(MFP->mf_tcdcr, (ospeed >> 8) & 0x0f);
}
/*
* Set UART for console use. Do normal init, then enable interrupts.
*/
void
serinitcons(baud)
int baud;
{
serinit(baud);
/* Set rts/dtr */
ym2149_rts(0);
ym2149_dtr(0);
single_inst_bset_b(MFP->mf_imra, (IA_RRDY|IA_RERR|IA_TRDY|IA_TERR));
}
int
sercngetc(dev)
dev_t dev;
{
u_char stat, c;
int s;
s = splserial();
while (!ISSET(stat = MFP->mf_rsr, RSR_BFULL)) {
if (!ISSET(stat, RSR_ENAB)) /* XXX */
MFP->mf_rsr |= RSR_ENAB;
if (stat & (RSR_FERR|RSR_PERR|RSR_OERR))
c = MFP->mf_udr;
}
c = MFP->mf_udr;
splx(s);
return c;
}
u_int s_imra;
u_int s_stat1, s_stat2, s_stat3;
void
sercnputc(dev, c)
dev_t dev;
int c;
{
int timo;
u_char stat, imra;
/* Mask serial interrupts */
imra = MFP->mf_imra & (IA_RRDY|IA_RERR|IA_TRDY|IA_TERR);
single_inst_bclr_b(MFP->mf_imra, imra);
s_imra = imra;
/* wait for any pending transmission to finish */
timo = 50000;
s_stat1 = MFP->mf_tsr;
while (!ISSET(stat = MFP->mf_tsr, TSR_BE) && --timo)
;
MFP->mf_udr = c;
/* wait for this transmission to complete */
timo = 1500000;
s_stat2 = MFP->mf_tsr;
while (!ISSET(stat = MFP->mf_tsr, TSR_BE) && --timo)
;
s_stat3 = MFP->mf_tsr;
/* Clear pending serial interrupts and re-enable */
MFP->mf_ipra = (u_int8_t)~imra;
single_inst_bset_b(MFP->mf_imra, imra);
}
void
sercnpollc(dev, on)
dev_t dev;
int on;
{
}
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