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freebsd-dev/sys/dev/rc/rc.c
John Baldwin 2e43efd0bb Drop "All rights reserved" from my copyright statements. 
Reviewed by:	rgrimes
MFC after:	1 month
Differential Revision:	https://reviews.freebsd.org/D19485
2019-03-06 22:11:45 +00:00

1315 lines
34 KiB
C
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/*-
* SPDX-License-Identifier: BSD-2-Clause-FreeBSD
*
* Copyright (C) 1995 by Pavel Antonov, Moscow, Russia.
* Copyright (C) 1995 by Andrey A. Chernov, Moscow, Russia.
* All rights reserved.
* Copyright (C) 2002 by John Baldwin <jhb@FreeBSD.org>
*
* 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.
*
* THIS SOFTWARE IS PROVIDED BY THE AUTHORS ``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.
*
* $FreeBSD$
*/
/*
* SDL Communications Riscom/8 (based on Cirrus Logic CL-CD180) driver
*
*/
/*#define RCDEBUG*/
#include "opt_tty.h"
#include <sys/param.h>
#include <sys/systm.h>
#include <sys/bus.h>
#include <sys/conf.h>
#include <sys/fcntl.h>
#include <sys/interrupt.h>
#include <sys/kernel.h>
#include <sys/malloc.h>
#include <sys/module.h>
#include <sys/serial.h>
#include <sys/tty.h>
#include <machine/bus.h>
#include <machine/resource.h>
#include <sys/rman.h>
#include <dev/ic/cd180.h>
#include <dev/rc/rcreg.h>
#include <isa/isavar.h>
#define IOBASE_ADDRS 14
#define rcin(sc, port) RC_IN(sc, port)
#define rcout(sc, port, v) RC_OUT(sc, port, v)
#define WAITFORCCR(sc, chan) rc_wait0((sc), (chan), __LINE__)
#define CCRCMD(sc, chan, cmd) do { \
WAITFORCCR((sc), (chan)); \
rcout((sc), CD180_CCR, (cmd)); \
} while (0)
#define RC_IBUFSIZE 256
#define RB_I_HIGH_WATER (TTYHOG - 2 * RC_IBUFSIZE)
#define RC_OBUFSIZE 512
#define RC_IHIGHWATER (3 * RC_IBUFSIZE / 4)
#define INPUT_FLAGS_SHIFT (2 * RC_IBUFSIZE)
#define LOTS_OF_EVENTS 64
#define RC_FAKEID 0x10
/* Per-channel structure */
struct rc_chans {
struct rc_softc *rc_rcb; /* back ptr */
u_short rc_flags; /* Misc. flags */
int rc_chan; /* Channel # */
u_char rc_ier; /* intr. enable reg */
u_char rc_msvr; /* modem sig. status */
u_char rc_cor2; /* options reg */
u_char rc_pendcmd; /* special cmd pending */
u_int rc_dcdwaits; /* how many waits DCD in open */
struct tty *rc_tp; /* tty struct */
u_char *rc_iptr; /* Chars input buffer */
u_char *rc_hiwat; /* hi-water mark */
u_char *rc_bufend; /* end of buffer */
u_char *rc_optr; /* ptr in output buf */
u_char *rc_obufend; /* end of output buf */
u_char rc_ibuf[4 * RC_IBUFSIZE]; /* input buffer */
u_char rc_obuf[RC_OBUFSIZE]; /* output buffer */
struct callout rc_dtrcallout;
};
/* Per-board structure */
struct rc_softc {
device_t sc_dev;
struct resource *sc_irq;
struct resource *sc_port[IOBASE_ADDRS];
int sc_irqrid;
void *sc_hwicookie;
bus_space_tag_t sc_bt;
bus_space_handle_t sc_bh;
u_int sc_unit; /* unit # */
u_char sc_dtr; /* DTR status */
int sc_scheduled_event;
void *sc_swicookie;
struct rc_chans sc_channels[CD180_NCHAN]; /* channels */
};
/* Static prototypes */
static t_close_t rc_close;
static void rc_break(struct tty *, int);
static void rc_release_resources(device_t dev);
static void rc_intr(void *);
static void rc_hwreset(struct rc_softc *, unsigned int);
static int rc_test(struct rc_softc *);
static void rc_discard_output(struct rc_chans *);
static int rc_modem(struct tty *, int, int);
static void rc_start(struct tty *);
static void rc_stop(struct tty *, int rw);
static int rc_param(struct tty *, struct termios *);
static void rc_pollcard(void *);
static void rc_reinit(struct rc_softc *);
#ifdef RCDEBUG
static void printrcflags();
#endif
static void rc_wait0(struct rc_softc *sc, int chan, int line);
static devclass_t rc_devclass;
/* Flags */
#define RC_DTR_OFF 0x0001 /* DTR wait, for close/open */
#define RC_ACTOUT 0x0002 /* Dial-out port active */
#define RC_RTSFLOW 0x0004 /* RTS flow ctl enabled */
#define RC_CTSFLOW 0x0008 /* CTS flow ctl enabled */
#define RC_DORXFER 0x0010 /* RXFER event planned */
#define RC_DOXXFER 0x0020 /* XXFER event planned */
#define RC_MODCHG 0x0040 /* Modem status changed */
#define RC_OSUSP 0x0080 /* Output suspended */
#define RC_OSBUSY 0x0100 /* start() routine in progress */
#define RC_WAS_BUFOVFL 0x0200 /* low-level buffer ovferflow */
#define RC_WAS_SILOVFL 0x0400 /* silo buffer overflow */
#define RC_SEND_RDY 0x0800 /* ready to send */
/* Table for translation of RCSR status bits to internal form */
static int rc_rcsrt[16] = {
0, TTY_OE, TTY_FE,
TTY_FE|TTY_OE, TTY_PE, TTY_PE|TTY_OE,
TTY_PE|TTY_FE, TTY_PE|TTY_FE|TTY_OE, TTY_BI,
TTY_BI|TTY_OE, TTY_BI|TTY_FE, TTY_BI|TTY_FE|TTY_OE,
TTY_BI|TTY_PE, TTY_BI|TTY_PE|TTY_OE, TTY_BI|TTY_PE|TTY_FE,
TTY_BI|TTY_PE|TTY_FE|TTY_OE
};
static int rc_ports[] =
{ 0x220, 0x240, 0x250, 0x260, 0x2a0, 0x2b0, 0x300, 0x320 };
static int iobase_addrs[IOBASE_ADDRS] =
{ 0, 0x400, 0x800, 0xc00, 0x1400, 0x1800, 0x1c00, 0x2000,
0x3000, 0x3400, 0x3800, 0x3c00, 0x4000, 0x8000 };
/**********************************************/
static int
rc_probe(device_t dev)
{
u_int port;
int i, found;
/*
* We don't know of any PnP ID's for these cards.
*/
if (isa_get_logicalid(dev) != 0)
return (ENXIO);
/*
* We have to have an IO port hint that is valid.
*/
port = isa_get_port(dev);
if (port == -1)
return (ENXIO);
found = 0;
for (i = 0; i < nitems(rc_ports); i++)
if (rc_ports[i] == port) {
found = 1;
break;
}
if (!found)
return (ENXIO);
/*
* We have to have an IRQ hint.
*/
if (isa_get_irq(dev) == -1)
return (ENXIO);
device_set_desc(dev, "SDL Riscom/8");
return (0);
}
static int
rc_attach(device_t dev)
{
struct rc_chans *rc;
struct tty *tp;
struct rc_softc *sc;
u_int port;
int base, chan, error, i, x;
sc = device_get_softc(dev);
sc->sc_dev = dev;
/*
* We need to have IO ports. Lots of them. We need
* the following ranges relative to the base port:
* 0x0 - 0x10
* 0x400 - 0x410
* 0x800 - 0x810
* 0xc00 - 0xc10
* 0x1400 - 0x1410
* 0x1800 - 0x1810
* 0x1c00 - 0x1c10
* 0x2000 - 0x2010
* 0x3000 - 0x3010
* 0x3400 - 0x3410
* 0x3800 - 0x3810
* 0x3c00 - 0x3c10
* 0x4000 - 0x4010
* 0x8000 - 0x8010
*/
port = isa_get_port(dev);
for (i = 0; i < IOBASE_ADDRS; i++)
if (bus_set_resource(dev, SYS_RES_IOPORT, i,
port + iobase_addrs[i], 0x10) != 0)
return (ENXIO);
error = ENOMEM;
for (i = 0; i < IOBASE_ADDRS; i++) {
x = i;
sc->sc_port[i] = bus_alloc_resource_anywhere(dev,
SYS_RES_IOPORT, &x, 0x10, RF_ACTIVE);
if (x != i) {
device_printf(dev, "ioport %d was rid %d\n", i, x);
goto fail;
}
if (sc->sc_port[i] == NULL) {
device_printf(dev, "failed to alloc ioports %x-%x\n",
port + iobase_addrs[i],
port + iobase_addrs[i] + 0x10);
goto fail;
}
}
sc->sc_bt = rman_get_bustag(sc->sc_port[0]);
sc->sc_bh = rman_get_bushandle(sc->sc_port[0]);
sc->sc_irq = bus_alloc_resource_any(dev, SYS_RES_IRQ, &sc->sc_irqrid,
RF_ACTIVE);
if (sc->sc_irq == NULL) {
device_printf(dev, "failed to alloc IRQ\n");
goto fail;
}
/*
* Now do some actual tests to make sure it works.
*/
error = ENXIO;
rcout(sc, CD180_PPRL, 0x22); /* Random values to Prescale reg. */
rcout(sc, CD180_PPRH, 0x11);
if (rcin(sc, CD180_PPRL) != 0x22 || rcin(sc, CD180_PPRH) != 0x11)
goto fail;
if (rc_test(sc))
goto fail;
/*
* Ok, start actually hooking things up.
*/
sc->sc_unit = device_get_unit(dev);
/*sc->sc_chipid = 0x10 + device_get_unit(dev);*/
device_printf(dev, "%d chans, firmware rev. %c\n",
CD180_NCHAN, (rcin(sc, CD180_GFRCR) & 0xF) + 'A');
rc = sc->sc_channels;
base = CD180_NCHAN * sc->sc_unit;
for (chan = 0; chan < CD180_NCHAN; chan++, rc++) {
rc->rc_rcb = sc;
rc->rc_chan = chan;
rc->rc_iptr = rc->rc_ibuf;
rc->rc_bufend = &rc->rc_ibuf[RC_IBUFSIZE];
rc->rc_hiwat = &rc->rc_ibuf[RC_IHIGHWATER];
rc->rc_optr = rc->rc_obufend = rc->rc_obuf;
callout_init(&rc->rc_dtrcallout, 0);
tp = rc->rc_tp = ttyalloc();
tp->t_sc = rc;
tp->t_oproc = rc_start;
tp->t_param = rc_param;
tp->t_modem = rc_modem;
tp->t_break = rc_break;
tp->t_close = rc_close;
tp->t_stop = rc_stop;
ttycreate(tp, TS_CALLOUT, "m%d", chan + base);
}
error = bus_setup_intr(dev, sc->sc_irq, INTR_TYPE_TTY, NULL, rc_intr,
sc, &sc->sc_hwicookie);
if (error) {
device_printf(dev, "failed to register interrupt handler\n");
goto fail;
}
swi_add(&tty_intr_event, "rc", rc_pollcard, sc, SWI_TTY, 0,
&sc->sc_swicookie);
return (0);
fail:
rc_release_resources(dev);
return (error);
}
static int
rc_detach(device_t dev)
{
struct rc_softc *sc;
struct rc_chans *rc;
int error, i;
sc = device_get_softc(dev);
rc = sc->sc_channels;
for (i = 0; i < CD180_NCHAN; i++, rc++)
ttyfree(rc->rc_tp);
error = bus_teardown_intr(dev, sc->sc_irq, sc->sc_hwicookie);
if (error)
device_printf(dev, "failed to deregister interrupt handler\n");
swi_remove(sc->sc_swicookie);
rc_release_resources(dev);
return (0);
}
static void
rc_release_resources(device_t dev)
{
struct rc_softc *sc;
int i;
sc = device_get_softc(dev);
if (sc->sc_irq != NULL) {
bus_release_resource(dev, SYS_RES_IRQ, sc->sc_irqrid,
sc->sc_irq);
sc->sc_irq = NULL;
}
for (i = 0; i < IOBASE_ADDRS; i++) {
if (sc->sc_port[i] == NULL)
break;
bus_release_resource(dev, SYS_RES_IOPORT, i, sc->sc_port[i]);
sc->sc_port[i] = NULL;
}
}
/* RC interrupt handling */
static void
rc_intr(void *arg)
{
struct rc_softc *sc;
struct rc_chans *rc;
int resid, chan;
u_char val, iack, bsr, ucnt, *optr;
int good_data, t_state;
sc = (struct rc_softc *)arg;
bsr = ~(rcin(sc, RC_BSR));
if (!(bsr & (RC_BSR_TOUT|RC_BSR_RXINT|RC_BSR_TXINT|RC_BSR_MOINT))) {
device_printf(sc->sc_dev, "extra interrupt\n");
rcout(sc, CD180_EOIR, 0);
return;
}
while (bsr & (RC_BSR_TOUT|RC_BSR_RXINT|RC_BSR_TXINT|RC_BSR_MOINT)) {
#ifdef RCDEBUG_DETAILED
device_printf(sc->sc_dev, "intr (%p) %s%s%s%s\n", arg, bsr,
(bsr & RC_BSR_TOUT)?"TOUT ":"",
(bsr & RC_BSR_RXINT)?"RXINT ":"",
(bsr & RC_BSR_TXINT)?"TXINT ":"",
(bsr & RC_BSR_MOINT)?"MOINT":"");
#endif
if (bsr & RC_BSR_TOUT) {
device_printf(sc->sc_dev,
"hardware failure, reset board\n");
rcout(sc, RC_CTOUT, 0);
rc_reinit(sc);
return;
}
if (bsr & RC_BSR_RXINT) {
iack = rcin(sc, RC_PILR_RX);
good_data = (iack == (GIVR_IT_RGDI | RC_FAKEID));
if (!good_data && iack != (GIVR_IT_REI | RC_FAKEID)) {
device_printf(sc->sc_dev,
"fake rxint: %02x\n", iack);
goto more_intrs;
}
chan = ((rcin(sc, CD180_GICR) & GICR_CHAN) >> GICR_LSH);
rc = &sc->sc_channels[chan];
t_state = rc->rc_tp->t_state;
/* Do RTS flow control stuff */
if ( (rc->rc_flags & RC_RTSFLOW)
|| !(t_state & TS_ISOPEN)
) {
if ( ( !(t_state & TS_ISOPEN)
|| (t_state & TS_TBLOCK)
)
&& (rc->rc_msvr & MSVR_RTS)
)
rcout(sc, CD180_MSVR,
rc->rc_msvr &= ~MSVR_RTS);
else if (!(rc->rc_msvr & MSVR_RTS))
rcout(sc, CD180_MSVR,
rc->rc_msvr |= MSVR_RTS);
}
ucnt = rcin(sc, CD180_RDCR) & 0xF;
resid = 0;
if (t_state & TS_ISOPEN) {
/* check for input buffer overflow */
if ((rc->rc_iptr + ucnt) >= rc->rc_bufend) {
resid = ucnt;
ucnt = rc->rc_bufend - rc->rc_iptr;
resid -= ucnt;
if (!(rc->rc_flags & RC_WAS_BUFOVFL)) {
rc->rc_flags |= RC_WAS_BUFOVFL;
sc->sc_scheduled_event++;
}
}
optr = rc->rc_iptr;
/* check foor good data */
if (good_data) {
while (ucnt-- > 0) {
val = rcin(sc, CD180_RDR);
optr[0] = val;
optr[INPUT_FLAGS_SHIFT] = 0;
optr++;
sc->sc_scheduled_event++;
if (val != 0 && val == rc->rc_tp->t_hotchar)
swi_sched(sc->sc_swicookie, 0);
}
} else {
/* Store also status data */
while (ucnt-- > 0) {
iack = rcin(sc, CD180_RCSR);
if (iack & RCSR_Timeout)
break;
if ( (iack & RCSR_OE)
&& !(rc->rc_flags & RC_WAS_SILOVFL)) {
rc->rc_flags |= RC_WAS_SILOVFL;
sc->sc_scheduled_event++;
}
val = rcin(sc, CD180_RDR);
/*
Don't store PE if IGNPAR and BREAK if IGNBRK,
this hack allows "raw" tty optimization
works even if IGN* is set.
*/
if ( !(iack & (RCSR_PE|RCSR_FE|RCSR_Break))
|| ((!(iack & (RCSR_PE|RCSR_FE))
|| !(rc->rc_tp->t_iflag & IGNPAR))
&& (!(iack & RCSR_Break)
|| !(rc->rc_tp->t_iflag & IGNBRK)))) {
if ( (iack & (RCSR_PE|RCSR_FE))
&& (t_state & TS_CAN_BYPASS_L_RINT)
&& ((iack & RCSR_FE)
|| ((iack & RCSR_PE)
&& (rc->rc_tp->t_iflag & INPCK))))
val = 0;
else if (val != 0 && val == rc->rc_tp->t_hotchar)
swi_sched(sc->sc_swicookie, 0);
optr[0] = val;
optr[INPUT_FLAGS_SHIFT] = iack;
optr++;
sc->sc_scheduled_event++;
}
}
}
rc->rc_iptr = optr;
rc->rc_flags |= RC_DORXFER;
} else
resid = ucnt;
/* Clear FIFO if necessary */
while (resid-- > 0) {
if (!good_data)
iack = rcin(sc, CD180_RCSR);
else
iack = 0;
if (iack & RCSR_Timeout)
break;
(void) rcin(sc, CD180_RDR);
}
goto more_intrs;
}
if (bsr & RC_BSR_MOINT) {
iack = rcin(sc, RC_PILR_MODEM);
if (iack != (GIVR_IT_MSCI | RC_FAKEID)) {
device_printf(sc->sc_dev, "fake moint: %02x\n",
iack);
goto more_intrs;
}
chan = ((rcin(sc, CD180_GICR) & GICR_CHAN) >> GICR_LSH);
rc = &sc->sc_channels[chan];
iack = rcin(sc, CD180_MCR);
rc->rc_msvr = rcin(sc, CD180_MSVR);
rcout(sc, CD180_MCR, 0);
#ifdef RCDEBUG
printrcflags(rc, "moint");
#endif
if (rc->rc_flags & RC_CTSFLOW) {
if (rc->rc_msvr & MSVR_CTS)
rc->rc_flags |= RC_SEND_RDY;
else
rc->rc_flags &= ~RC_SEND_RDY;
} else
rc->rc_flags |= RC_SEND_RDY;
if ((iack & MCR_CDchg) && !(rc->rc_flags & RC_MODCHG)) {
sc->sc_scheduled_event += LOTS_OF_EVENTS;
rc->rc_flags |= RC_MODCHG;
swi_sched(sc->sc_swicookie, 0);
}
goto more_intrs;
}
if (bsr & RC_BSR_TXINT) {
iack = rcin(sc, RC_PILR_TX);
if (iack != (GIVR_IT_TDI | RC_FAKEID)) {
device_printf(sc->sc_dev, "fake txint: %02x\n",
iack);
goto more_intrs;
}
chan = ((rcin(sc, CD180_GICR) & GICR_CHAN) >> GICR_LSH);
rc = &sc->sc_channels[chan];
if ( (rc->rc_flags & RC_OSUSP)
|| !(rc->rc_flags & RC_SEND_RDY)
)
goto more_intrs;
/* Handle breaks and other stuff */
if (rc->rc_pendcmd) {
rcout(sc, CD180_COR2, rc->rc_cor2 |= COR2_ETC);
rcout(sc, CD180_TDR, CD180_C_ESC);
rcout(sc, CD180_TDR, rc->rc_pendcmd);
rcout(sc, CD180_COR2, rc->rc_cor2 &= ~COR2_ETC);
rc->rc_pendcmd = 0;
goto more_intrs;
}
optr = rc->rc_optr;
resid = rc->rc_obufend - optr;
if (resid > CD180_NFIFO)
resid = CD180_NFIFO;
while (resid-- > 0)
rcout(sc, CD180_TDR, *optr++);
rc->rc_optr = optr;
/* output completed? */
if (optr >= rc->rc_obufend) {
rcout(sc, CD180_IER, rc->rc_ier &= ~IER_TxRdy);
#ifdef RCDEBUG
device_printf(sc->sc_dev,
"channel %d: output completed\n",
rc->rc_chan);
#endif
if (!(rc->rc_flags & RC_DOXXFER)) {
sc->sc_scheduled_event += LOTS_OF_EVENTS;
rc->rc_flags |= RC_DOXXFER;
swi_sched(sc->sc_swicookie, 0);
}
}
}
more_intrs:
rcout(sc, CD180_EOIR, 0); /* end of interrupt */
rcout(sc, RC_CTOUT, 0);
bsr = ~(rcin(sc, RC_BSR));
}
}
/* Feed characters to output buffer */
static void
rc_start(struct tty *tp)
{
struct rc_softc *sc;
struct rc_chans *rc;
int s;
rc = tp->t_sc;
if (rc->rc_flags & RC_OSBUSY)
return;
sc = rc->rc_rcb;
s = spltty();
rc->rc_flags |= RC_OSBUSY;
critical_enter();
if (tp->t_state & TS_TTSTOP)
rc->rc_flags |= RC_OSUSP;
else
rc->rc_flags &= ~RC_OSUSP;
/* Do RTS flow control stuff */
if ( (rc->rc_flags & RC_RTSFLOW)
&& (tp->t_state & TS_TBLOCK)
&& (rc->rc_msvr & MSVR_RTS)
) {
rcout(sc, CD180_CAR, rc->rc_chan);
rcout(sc, CD180_MSVR, rc->rc_msvr &= ~MSVR_RTS);
} else if (!(rc->rc_msvr & MSVR_RTS)) {
rcout(sc, CD180_CAR, rc->rc_chan);
rcout(sc, CD180_MSVR, rc->rc_msvr |= MSVR_RTS);
}
critical_exit();
if (tp->t_state & (TS_TIMEOUT|TS_TTSTOP))
goto out;
#ifdef RCDEBUG
printrcflags(rc, "rcstart");
#endif
ttwwakeup(tp);
#ifdef RCDEBUG
printf("rcstart: outq = %d obuf = %d\n",
tp->t_outq.c_cc, rc->rc_obufend - rc->rc_optr);
#endif
if (tp->t_state & TS_BUSY)
goto out; /* output still in progress ... */
if (tp->t_outq.c_cc > 0) {
u_int ocnt;
tp->t_state |= TS_BUSY;
ocnt = q_to_b(&tp->t_outq, rc->rc_obuf, sizeof rc->rc_obuf);
critical_enter();
rc->rc_optr = rc->rc_obuf;
rc->rc_obufend = rc->rc_optr + ocnt;
critical_exit();
if (!(rc->rc_ier & IER_TxRdy)) {
#ifdef RCDEBUG
device_printf(sc->sc_dev,
"channel %d: rcstart enable txint\n", rc->rc_chan);
#endif
rcout(sc, CD180_CAR, rc->rc_chan);
rcout(sc, CD180_IER, rc->rc_ier |= IER_TxRdy);
}
}
out:
rc->rc_flags &= ~RC_OSBUSY;
(void) splx(s);
}
/* Handle delayed events. */
void
rc_pollcard(void *arg)
{
struct rc_softc *sc;
struct rc_chans *rc;
struct tty *tp;
u_char *tptr, *eptr;
int chan, icnt;
sc = (struct rc_softc *)arg;
if (sc->sc_scheduled_event == 0)
return;
do {
rc = sc->sc_channels;
for (chan = 0; chan < CD180_NCHAN; rc++, chan++) {
tp = rc->rc_tp;
#ifdef RCDEBUG
if (rc->rc_flags & (RC_DORXFER|RC_DOXXFER|RC_MODCHG|
RC_WAS_BUFOVFL|RC_WAS_SILOVFL))
printrcflags(rc, "rcevent");
#endif
if (rc->rc_flags & RC_WAS_BUFOVFL) {
critical_enter();
rc->rc_flags &= ~RC_WAS_BUFOVFL;
sc->sc_scheduled_event--;
critical_exit();
device_printf(sc->sc_dev,
"channel %d: interrupt-level buffer overflow\n",
chan);
}
if (rc->rc_flags & RC_WAS_SILOVFL) {
critical_enter();
rc->rc_flags &= ~RC_WAS_SILOVFL;
sc->sc_scheduled_event--;
critical_exit();
device_printf(sc->sc_dev,
"channel %d: silo overflow\n", chan);
}
if (rc->rc_flags & RC_MODCHG) {
critical_enter();
rc->rc_flags &= ~RC_MODCHG;
sc->sc_scheduled_event -= LOTS_OF_EVENTS;
critical_exit();
ttyld_modem(tp, !!(rc->rc_msvr & MSVR_CD));
}
if (rc->rc_flags & RC_DORXFER) {
critical_enter();
rc->rc_flags &= ~RC_DORXFER;
eptr = rc->rc_iptr;
if (rc->rc_bufend == &rc->rc_ibuf[2 * RC_IBUFSIZE])
tptr = &rc->rc_ibuf[RC_IBUFSIZE];
else
tptr = rc->rc_ibuf;
icnt = eptr - tptr;
if (icnt > 0) {
if (rc->rc_bufend == &rc->rc_ibuf[2 * RC_IBUFSIZE]) {
rc->rc_iptr = rc->rc_ibuf;
rc->rc_bufend = &rc->rc_ibuf[RC_IBUFSIZE];
rc->rc_hiwat = &rc->rc_ibuf[RC_IHIGHWATER];
} else {
rc->rc_iptr = &rc->rc_ibuf[RC_IBUFSIZE];
rc->rc_bufend = &rc->rc_ibuf[2 * RC_IBUFSIZE];
rc->rc_hiwat =
&rc->rc_ibuf[RC_IBUFSIZE + RC_IHIGHWATER];
}
if ( (rc->rc_flags & RC_RTSFLOW)
&& (tp->t_state & TS_ISOPEN)
&& !(tp->t_state & TS_TBLOCK)
&& !(rc->rc_msvr & MSVR_RTS)
) {
rcout(sc, CD180_CAR, chan);
rcout(sc, CD180_MSVR,
rc->rc_msvr |= MSVR_RTS);
}
sc->sc_scheduled_event -= icnt;
}
critical_exit();
if (icnt <= 0 || !(tp->t_state & TS_ISOPEN))
goto done1;
if ( (tp->t_state & TS_CAN_BYPASS_L_RINT)
&& !(tp->t_state & TS_LOCAL)) {
if ((tp->t_rawq.c_cc + icnt) >= RB_I_HIGH_WATER
&& ((rc->rc_flags & RC_RTSFLOW) || (tp->t_iflag & IXOFF))
&& !(tp->t_state & TS_TBLOCK))
ttyblock(tp);
tk_nin += icnt;
tk_rawcc += icnt;
tp->t_rawcc += icnt;
if (b_to_q(tptr, icnt, &tp->t_rawq))
device_printf(sc->sc_dev,
"channel %d: tty-level buffer overflow\n",
chan);
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;
rc_start(tp);
}
} else {
for (; tptr < eptr; tptr++)
ttyld_rint(tp,
(tptr[0] |
rc_rcsrt[tptr[INPUT_FLAGS_SHIFT] & 0xF]));
}
done1: ;
}
if (rc->rc_flags & RC_DOXXFER) {
critical_enter();
sc->sc_scheduled_event -= LOTS_OF_EVENTS;
rc->rc_flags &= ~RC_DOXXFER;
rc->rc_tp->t_state &= ~TS_BUSY;
critical_exit();
ttyld_start(tp);
}
if (sc->sc_scheduled_event == 0)
break;
}
} while (sc->sc_scheduled_event >= LOTS_OF_EVENTS);
}
static void
rc_stop(struct tty *tp, int rw)
{
struct rc_softc *sc;
struct rc_chans *rc;
u_char *tptr, *eptr;
rc = tp->t_sc;
sc = rc->rc_rcb;
#ifdef RCDEBUG
device_printf(sc->sc_dev, "channel %d: rc_stop %s%s\n",
rc->rc_chan, (rw & FWRITE)?"FWRITE ":"", (rw & FREAD)?"FREAD":"");
#endif
if (rw & FWRITE)
rc_discard_output(rc);
critical_enter();
if (rw & FREAD) {
rc->rc_flags &= ~RC_DORXFER;
eptr = rc->rc_iptr;
if (rc->rc_bufend == &rc->rc_ibuf[2 * RC_IBUFSIZE]) {
tptr = &rc->rc_ibuf[RC_IBUFSIZE];
rc->rc_iptr = &rc->rc_ibuf[RC_IBUFSIZE];
} else {
tptr = rc->rc_ibuf;
rc->rc_iptr = rc->rc_ibuf;
}
sc->sc_scheduled_event -= eptr - tptr;
}
if (tp->t_state & TS_TTSTOP)
rc->rc_flags |= RC_OSUSP;
else
rc->rc_flags &= ~RC_OSUSP;
critical_exit();
}
static void
rc_close(struct tty *tp)
{
struct rc_chans *rc;
struct rc_softc *sc;
int s;
rc = tp->t_sc;
sc = rc->rc_rcb;
s = spltty();
rcout(sc, CD180_CAR, rc->rc_chan);
/* Disable rx/tx intrs */
rcout(sc, CD180_IER, rc->rc_ier = 0);
if ( (tp->t_cflag & HUPCL)
|| (!(rc->rc_flags & RC_ACTOUT)
&& !(rc->rc_msvr & MSVR_CD)
&& !(tp->t_cflag & CLOCAL))
|| !(tp->t_state & TS_ISOPEN)
) {
CCRCMD(sc, rc->rc_chan, CCR_ResetChan);
WAITFORCCR(sc, rc->rc_chan);
(void) rc_modem(tp, SER_RTS, 0);
ttydtrwaitstart(tp);
}
rc->rc_flags &= ~RC_ACTOUT;
wakeup( &rc->rc_rcb); /* wake bi */
wakeup(TSA_CARR_ON(tp));
(void) splx(s);
}
/* Reset the bastard */
static void
rc_hwreset(struct rc_softc *sc, u_int chipid)
{
CCRCMD(sc, -1, CCR_HWRESET); /* Hardware reset */
DELAY(20000);
WAITFORCCR(sc, -1);
rcout(sc, RC_CTOUT, 0); /* Clear timeout */
rcout(sc, CD180_GIVR, chipid);
rcout(sc, CD180_GICR, 0);
/* Set Prescaler Registers (1 msec) */
rcout(sc, CD180_PPRL, ((RC_OSCFREQ + 999) / 1000) & 0xFF);
rcout(sc, CD180_PPRH, ((RC_OSCFREQ + 999) / 1000) >> 8);
/* Initialize Priority Interrupt Level Registers */
rcout(sc, CD180_PILR1, RC_PILR_MODEM);
rcout(sc, CD180_PILR2, RC_PILR_TX);
rcout(sc, CD180_PILR3, RC_PILR_RX);
/* Reset DTR */
rcout(sc, RC_DTREG, ~0);
}
/* Set channel parameters */
static int
rc_param(struct tty *tp, struct termios *ts)
{
struct rc_softc *sc;
struct rc_chans *rc;
int idivs, odivs, s, val, cflag, iflag, lflag, inpflow;
if ( ts->c_ospeed < 0 || ts->c_ospeed > 76800
|| ts->c_ispeed < 0 || ts->c_ispeed > 76800
)
return (EINVAL);
if (ts->c_ispeed == 0)
ts->c_ispeed = ts->c_ospeed;
odivs = RC_BRD(ts->c_ospeed);
idivs = RC_BRD(ts->c_ispeed);
rc = tp->t_sc;
sc = rc->rc_rcb;
s = spltty();
/* Select channel */
rcout(sc, CD180_CAR, rc->rc_chan);
/* If speed == 0, hangup line */
if (ts->c_ospeed == 0) {
CCRCMD(sc, rc->rc_chan, CCR_ResetChan);
WAITFORCCR(sc, rc->rc_chan);
(void) rc_modem(tp, 0, SER_DTR);
}
tp->t_state &= ~TS_CAN_BYPASS_L_RINT;
cflag = ts->c_cflag;
iflag = ts->c_iflag;
lflag = ts->c_lflag;
if (idivs > 0) {
rcout(sc, CD180_RBPRL, idivs & 0xFF);
rcout(sc, CD180_RBPRH, idivs >> 8);
}
if (odivs > 0) {
rcout(sc, CD180_TBPRL, odivs & 0xFF);
rcout(sc, CD180_TBPRH, odivs >> 8);
}
/* set timeout value */
if (ts->c_ispeed > 0) {
int itm = ts->c_ispeed > 2400 ? 5 : 10000 / ts->c_ispeed + 1;
if ( !(lflag & ICANON)
&& ts->c_cc[VMIN] != 0 && ts->c_cc[VTIME] != 0
&& ts->c_cc[VTIME] * 10 > itm)
itm = ts->c_cc[VTIME] * 10;
rcout(sc, CD180_RTPR, itm <= 255 ? itm : 255);
}
switch (cflag & CSIZE) {
case CS5: val = COR1_5BITS; break;
case CS6: val = COR1_6BITS; break;
case CS7: val = COR1_7BITS; break;
default:
case CS8: val = COR1_8BITS; break;
}
if (cflag & PARENB) {
val |= COR1_NORMPAR;
if (cflag & PARODD)
val |= COR1_ODDP;
if (!(cflag & INPCK))
val |= COR1_Ignore;
} else
val |= COR1_Ignore;
if (cflag & CSTOPB)
val |= COR1_2SB;
rcout(sc, CD180_COR1, val);
/* Set FIFO threshold */
val = ts->c_ospeed <= 4800 ? 1 : CD180_NFIFO / 2;
inpflow = 0;
if ( (iflag & IXOFF)
&& ( ts->c_cc[VSTOP] != _POSIX_VDISABLE
&& ( ts->c_cc[VSTART] != _POSIX_VDISABLE
|| (iflag & IXANY)
)
)
) {
inpflow = 1;
val |= COR3_SCDE|COR3_FCT;
}
rcout(sc, CD180_COR3, val);
/* Initialize on-chip automatic flow control */
val = 0;
rc->rc_flags &= ~(RC_CTSFLOW|RC_SEND_RDY);
if (cflag & CCTS_OFLOW) {
rc->rc_flags |= RC_CTSFLOW;
val |= COR2_CtsAE;
} else
rc->rc_flags |= RC_SEND_RDY;
if (tp->t_state & TS_TTSTOP)
rc->rc_flags |= RC_OSUSP;
else
rc->rc_flags &= ~RC_OSUSP;
if (cflag & CRTS_IFLOW)
rc->rc_flags |= RC_RTSFLOW;
else
rc->rc_flags &= ~RC_RTSFLOW;
if (inpflow) {
if (ts->c_cc[VSTART] != _POSIX_VDISABLE)
rcout(sc, CD180_SCHR1, ts->c_cc[VSTART]);
rcout(sc, CD180_SCHR2, ts->c_cc[VSTOP]);
val |= COR2_TxIBE;
if (iflag & IXANY)
val |= COR2_IXM;
}
rcout(sc, CD180_COR2, rc->rc_cor2 = val);
CCRCMD(sc, rc->rc_chan, CCR_CORCHG1 | CCR_CORCHG2 | CCR_CORCHG3);
ttyldoptim(tp);
/* modem ctl */
val = cflag & CLOCAL ? 0 : MCOR1_CDzd;
if (cflag & CCTS_OFLOW)
val |= MCOR1_CTSzd;
rcout(sc, CD180_MCOR1, val);
val = cflag & CLOCAL ? 0 : MCOR2_CDod;
if (cflag & CCTS_OFLOW)
val |= MCOR2_CTSod;
rcout(sc, CD180_MCOR2, val);
/* enable i/o and interrupts */
CCRCMD(sc, rc->rc_chan,
CCR_XMTREN | ((cflag & CREAD) ? CCR_RCVREN : CCR_RCVRDIS));
WAITFORCCR(sc, rc->rc_chan);
rc->rc_ier = cflag & CLOCAL ? 0 : IER_CD;
if (cflag & CCTS_OFLOW)
rc->rc_ier |= IER_CTS;
if (cflag & CREAD)
rc->rc_ier |= IER_RxData;
if (tp->t_state & TS_BUSY)
rc->rc_ier |= IER_TxRdy;
if (ts->c_ospeed != 0)
rc_modem(tp, SER_DTR, 0);
if ((cflag & CCTS_OFLOW) && (rc->rc_msvr & MSVR_CTS))
rc->rc_flags |= RC_SEND_RDY;
rcout(sc, CD180_IER, rc->rc_ier);
(void) splx(s);
return 0;
}
/* Re-initialize board after bogus interrupts */
static void
rc_reinit(struct rc_softc *sc)
{
struct rc_chans *rc;
int i;
rc_hwreset(sc, RC_FAKEID);
rc = sc->sc_channels;
for (i = 0; i < CD180_NCHAN; i++, rc++)
(void) rc_param(rc->rc_tp, &rc->rc_tp->t_termios);
}
/* Modem control routines */
static int
rc_modem(struct tty *tp, int biton, int bitoff)
{
struct rc_chans *rc;
struct rc_softc *sc;
u_char *dtr;
u_char msvr;
rc = tp->t_sc;
sc = rc->rc_rcb;
dtr = &sc->sc_dtr;
rcout(sc, CD180_CAR, rc->rc_chan);
if (biton == 0 && bitoff == 0) {
msvr = rc->rc_msvr = rcin(sc, CD180_MSVR);
if (msvr & MSVR_RTS)
biton |= SER_RTS;
if (msvr & MSVR_CTS)
biton |= SER_CTS;
if (msvr & MSVR_DSR)
biton |= SER_DSR;
if (msvr & MSVR_DTR)
biton |= SER_DTR;
if (msvr & MSVR_CD)
biton |= SER_DCD;
if (~rcin(sc, RC_RIREG) & (1 << rc->rc_chan))
biton |= SER_RI;
return biton;
}
if (biton & SER_DTR)
rcout(sc, RC_DTREG, ~(*dtr |= 1 << rc->rc_chan));
if (bitoff & SER_DTR)
rcout(sc, RC_DTREG, ~(*dtr &= ~(1 << rc->rc_chan)));
msvr = rcin(sc, CD180_MSVR);
if (biton & SER_DTR)
msvr |= MSVR_DTR;
if (bitoff & SER_DTR)
msvr &= ~MSVR_DTR;
if (biton & SER_RTS)
msvr |= MSVR_RTS;
if (bitoff & SER_RTS)
msvr &= ~MSVR_RTS;
rcout(sc, CD180_MSVR, msvr);
return 0;
}
static void
rc_break(struct tty *tp, int brk)
{
struct rc_chans *rc;
rc = tp->t_sc;
if (brk)
rc->rc_pendcmd = CD180_C_SBRK;
else
rc->rc_pendcmd = CD180_C_EBRK;
}
#define ERR(s) do { \
device_printf(sc->sc_dev, "%s", ""); \
printf s ; \
printf("\n"); \
(void) splx(old_level); \
return 1; \
} while (0)
/* Test the board. */
int
rc_test(struct rc_softc *sc)
{
int chan = 0;
int i = 0, rcnt, old_level;
unsigned int iack, chipid;
unsigned short divs;
static u_char ctest[] = "\377\125\252\045\244\0\377";
#define CTLEN 8
struct rtest {
u_char txbuf[CD180_NFIFO]; /* TX buffer */
u_char rxbuf[CD180_NFIFO]; /* RX buffer */
int rxptr; /* RX pointer */
int txptr; /* TX pointer */
} tchans[CD180_NCHAN];
old_level = spltty();
chipid = RC_FAKEID;
/* First, reset board to initial state */
rc_hwreset(sc, chipid);
divs = RC_BRD(19200);
/* Initialize channels */
for (chan = 0; chan < CD180_NCHAN; chan++) {
/* Select and reset channel */
rcout(sc, CD180_CAR, chan);
CCRCMD(sc, chan, CCR_ResetChan);
WAITFORCCR(sc, chan);
/* Set speed */
rcout(sc, CD180_RBPRL, divs & 0xFF);
rcout(sc, CD180_RBPRH, divs >> 8);
rcout(sc, CD180_TBPRL, divs & 0xFF);
rcout(sc, CD180_TBPRH, divs >> 8);
/* set timeout value */
rcout(sc, CD180_RTPR, 0);
/* Establish local loopback */
rcout(sc, CD180_COR1, COR1_NOPAR | COR1_8BITS | COR1_1SB);
rcout(sc, CD180_COR2, COR2_LLM);
rcout(sc, CD180_COR3, CD180_NFIFO);
CCRCMD(sc, chan, CCR_CORCHG1 | CCR_CORCHG2 | CCR_CORCHG3);
CCRCMD(sc, chan, CCR_RCVREN | CCR_XMTREN);
WAITFORCCR(sc, chan);
rcout(sc, CD180_MSVR, MSVR_RTS);
/* Fill TXBUF with test data */
for (i = 0; i < CD180_NFIFO; i++) {
tchans[chan].txbuf[i] = ctest[i];
tchans[chan].rxbuf[i] = 0;
}
tchans[chan].txptr = tchans[chan].rxptr = 0;
/* Now, start transmit */
rcout(sc, CD180_IER, IER_TxMpty|IER_RxData);
}
/* Pseudo-interrupt poll stuff */
for (rcnt = 10000; rcnt-- > 0; rcnt--) {
i = ~(rcin(sc, RC_BSR));
if (i & RC_BSR_TOUT)
ERR(("BSR timeout bit set\n"));
else if (i & RC_BSR_TXINT) {
iack = rcin(sc, RC_PILR_TX);
if (iack != (GIVR_IT_TDI | chipid))
ERR(("Bad TX intr ack (%02x != %02x)\n",
iack, GIVR_IT_TDI | chipid));
chan = (rcin(sc, CD180_GICR) & GICR_CHAN) >> GICR_LSH;
/* If no more data to transmit, disable TX intr */
if (tchans[chan].txptr >= CD180_NFIFO) {
iack = rcin(sc, CD180_IER);
rcout(sc, CD180_IER, iack & ~IER_TxMpty);
} else {
for (iack = tchans[chan].txptr;
iack < CD180_NFIFO; iack++)
rcout(sc, CD180_TDR,
tchans[chan].txbuf[iack]);
tchans[chan].txptr = iack;
}
rcout(sc, CD180_EOIR, 0);
} else if (i & RC_BSR_RXINT) {
u_char ucnt;
iack = rcin(sc, RC_PILR_RX);
if (iack != (GIVR_IT_RGDI | chipid) &&
iack != (GIVR_IT_REI | chipid))
ERR(("Bad RX intr ack (%02x != %02x)\n",
iack, GIVR_IT_RGDI | chipid));
chan = (rcin(sc, CD180_GICR) & GICR_CHAN) >> GICR_LSH;
ucnt = rcin(sc, CD180_RDCR) & 0xF;
while (ucnt-- > 0) {
iack = rcin(sc, CD180_RCSR);
if (iack & RCSR_Timeout)
break;
if (iack & 0xF)
ERR(("Bad char chan %d (RCSR = %02X)\n",
chan, iack));
if (tchans[chan].rxptr > CD180_NFIFO)
ERR(("Got extra chars chan %d\n",
chan));
tchans[chan].rxbuf[tchans[chan].rxptr++] =
rcin(sc, CD180_RDR);
}
rcout(sc, CD180_EOIR, 0);
}
rcout(sc, RC_CTOUT, 0);
for (iack = chan = 0; chan < CD180_NCHAN; chan++)
if (tchans[chan].rxptr >= CD180_NFIFO)
iack++;
if (iack == CD180_NCHAN)
break;
}
for (chan = 0; chan < CD180_NCHAN; chan++) {
/* Select and reset channel */
rcout(sc, CD180_CAR, chan);
CCRCMD(sc, chan, CCR_ResetChan);
}
if (!rcnt)
ERR(("looses characters during local loopback\n"));
/* Now, check data */
for (chan = 0; chan < CD180_NCHAN; chan++)
for (i = 0; i < CD180_NFIFO; i++)
if (ctest[i] != tchans[chan].rxbuf[i])
ERR(("data mismatch chan %d ptr %d (%d != %d)\n",
chan, i, ctest[i], tchans[chan].rxbuf[i]));
(void) splx(old_level);
return 0;
}
#ifdef RCDEBUG
static void
printrcflags(struct rc_chans *rc, char *comment)
{
struct rc_softc *sc;
u_short f = rc->rc_flags;
sc = rc->rc_rcb;
printf("rc%d/%d: %s flags: %s%s%s%s%s%s%s%s%s%s%s%s\n",
rc->rc_rcb->rcb_unit, rc->rc_chan, comment,
(f & RC_DTR_OFF)?"DTR_OFF " :"",
(f & RC_ACTOUT) ?"ACTOUT " :"",
(f & RC_RTSFLOW)?"RTSFLOW " :"",
(f & RC_CTSFLOW)?"CTSFLOW " :"",
(f & RC_DORXFER)?"DORXFER " :"",
(f & RC_DOXXFER)?"DOXXFER " :"",
(f & RC_MODCHG) ?"MODCHG " :"",
(f & RC_OSUSP) ?"OSUSP " :"",
(f & RC_OSBUSY) ?"OSBUSY " :"",
(f & RC_WAS_BUFOVFL) ?"BUFOVFL " :"",
(f & RC_WAS_SILOVFL) ?"SILOVFL " :"",
(f & RC_SEND_RDY) ?"SEND_RDY":"");
rcout(sc, CD180_CAR, rc->rc_chan);
printf("rc%d/%d: msvr %02x ier %02x ccsr %02x\n",
rc->rc_rcb->rcb_unit, rc->rc_chan,
rcin(sc, CD180_MSVR),
rcin(sc, CD180_IER),
rcin(sc, CD180_CCSR));
}
#endif /* RCDEBUG */
static void
rc_discard_output(struct rc_chans *rc)
{
critical_enter();
if (rc->rc_flags & RC_DOXXFER) {
rc->rc_rcb->sc_scheduled_event -= LOTS_OF_EVENTS;
rc->rc_flags &= ~RC_DOXXFER;
}
rc->rc_optr = rc->rc_obufend;
rc->rc_tp->t_state &= ~TS_BUSY;
critical_exit();
ttwwakeup(rc->rc_tp);
}
static void
rc_wait0(struct rc_softc *sc, int chan, int line)
{
int rcnt;
for (rcnt = 50; rcnt && rcin(sc, CD180_CCR); rcnt--)
DELAY(30);
if (rcnt == 0)
device_printf(sc->sc_dev,
"channel %d command timeout, rc.c line: %d\n", chan, line);
}
static device_method_t rc_methods[] = {
/* Device interface */
DEVMETHOD(device_probe, rc_probe),
DEVMETHOD(device_attach, rc_attach),
DEVMETHOD(device_detach, rc_detach),
{ 0, 0 }
};
static driver_t rc_driver = {
"rc",
rc_methods, sizeof(struct rc_softc),
};
DRIVER_MODULE(rc, isa, rc_driver, rc_devclass, 0, 0);
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