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freebsd-dev/sys/dev/cy/cy.c
Bruce Evans f3b37f91c1 Improve input flow control. 
Use input buffer watermarks of TTYHOG-512 (high) and (high)*7/8
(low) instead of TTYHOG/2 (high) and TTYHOG/5 (low) to agree with
some drivers.  512 is magic and some things depended on TTYHOG/2
>= TTYHOG-512 to work; now they depend on the 512 magic not changing
and TTYHOG-512 being significantly larger than 0.  This should be
handled in ttsetwater().

Separate the decision about whether to do input flow control from
doing it.  ttyblock() now just starts input flow control (hardware
and/or software) and there is a new function ttyunblock() to stop
it.  The decisions are the same except for the watermark changes
and allowing for input expansion for PARMRK.

When flushing input, try harder at first to send a start character
if required, but give up if the first attempt fails.

cy.c, rc.c, sio.c:
Simplify: let ttyinput() handle input flow control if it is not
being bypassed.  Use ttyblock() to start flow control otherwise.

rc.c:
Use same input flow control test as elsewhere: test in a more
efficient order and start flow control at >= highwater instead of
at > highwater.
1995-07-31 18:29:51 +00:00

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/*-
* cyclades cyclom-y serial driver
* Andrew Herbert <andrew@werple.apana.org.au>, 17 August 1993
*
* Copyright (c) 1993 Andrew Herbert.
* 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. The name Andrew Herbert may not be used to endorse or promote products
* derived from this software without specific prior written permission.
*
* THIS SOFTWARE IS PROVIDED BY ``AS IS'' AND ANY EXPRESS OR IMPLIED
* WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED WARRANTIES OF
* MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE DISCLAIMED. IN
* NO EVENT SHALL I 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.
*
* $Id: cy.c,v 1.13 1995/07/29 08:33:06 bde Exp $
*/
#include "cy.h"
#if NCY > 0
/*
* TODO:
* Check that cy16's work.
* Implement BREAK.
* Fix overflows when closing line.
* Atomic COR change.
* Don't report individual ports in devconf; busy flag for board should be
* union of the current individual busy flags.
* Consoles.
*/
/*
* Temporary compile-time configuration options.
*/
#define RxFifoThreshold (CD1400_RX_FIFO_SIZE / 2)
/* Number of chars in the receiver FIFO before an
* an interrupt is generated. Should depend on
* line speed. Needs to be about 6 on a 486DX33
* for 4 active ports at 115200 bps. Why doesn't
* 10 work?
*/
#define PollMode /* Use polling-based irq service routine, not the
* hardware svcack lines. Must be defined for
* Cyclom-16Y boards. Less efficient for Cyclom-8Ys,
* and stops 4 * 115200 bps from working.
*/
#undef Smarts /* Enable slightly more CD1400 intelligence. Mainly
* the output CR/LF processing, plus we can avoid a
* few checks usually done in ttyinput().
*
* XXX not fully implemented, and not particularly
* worthwhile.
*/
#undef CyDebug /* Include debugging code (not very expensive). */
/* These will go away. */
#undef SOFT_CTS_OFLOW
#define SOFT_HOTCHAR
#include <sys/param.h>
#include <sys/systm.h>
#include <sys/reboot.h>
#include <sys/ioctl.h>
#include <sys/tty.h>
#include <sys/proc.h>
#include <sys/user.h>
#include <sys/conf.h>
#include <sys/dkstat.h>
#include <sys/file.h>
#include <sys/uio.h>
#include <sys/kernel.h>
#include <sys/malloc.h>
#include <sys/syslog.h>
#include <sys/devconf.h>
#include <machine/clock.h>
#include <i386/isa/icu.h> /* XXX just to get at `imen' */
#include <i386/isa/isa.h>
#include <i386/isa/isa_device.h>
#include <i386/isa/cyreg.h>
#include <i386/isa/ic/cd1400.h>
/*
* Dictionary so that I can name everything *sio* or *com* to compare with
* sio.c. There is also lots of ugly formatting and unnecessary ifdefs to
* simplify the comparision. These will go away.
*/
#define LSR_BI CD1400_RDSR_BREAK
#define LSR_FE CD1400_RDSR_FE
#define LSR_OE CD1400_RDSR_OE
#define LSR_PE CD1400_RDSR_PE
#define MCR_DTR CD1400_MSVR2_DTR
#define MCR_RTS CD1400_MSVR1_RTS
#define MSR_CTS CD1400_MSVR2_CTS
#define MSR_DCD CD1400_MSVR2_CD
#define MSR_DSR CD1400_MSVR2_DSR
#define MSR_RI CD1400_MSVR2_RI
#define NSIO (NCY * CY_MAX_PORTS)
#define comconsole cyconsole
#define comdefaultrate cydefaultrate
#define com_events cy_events
#define comhardclose cyhardclose
#define commajor cymajor
#define commctl cymctl
#define comparam cyparam
#define comspeed cyspeed
#define comstart cystart
#define comwakeup cywakeup
#define kdc_sio kdc_cy
#define nsio_tty ncy_tty
#define p_com_addr p_cy_addr
#define sioattach cyattach
#define sioclose cyclose
#define siodevtotty cydevtotty
#define siodriver cydriver
#define siodtrwakeup cydtrwakeup
#define sioioctl cyioctl
#define siointr cyintr
#define siointr1 cyintr1
#define siointrts cyintrts
#define sioopen cyopen
#define siopoll cypoll
#define sioprobe cyprobe
#define sioread cyread
#define sioregisterdev cyregisterdev
#define siosettimeout cysettimeout
#define siostop cystop
#define siowrite cywrite
#define sio_timeout cy_timeout
#define sio_timeouts_until_log cy_timeouts_until_log
#define sio_tty cy_tty
#define CY_MAX_PORTS (CD1400_NO_OF_CHANNELS * CY_MAX_CD1400s)
/* We encode the cyclom unit number (cyu) in spare bits in the IVR's. */
#define CD1400_xIVR_CHAN_SHIFT 3
#define CD1400_xIVR_CHAN 0x0F /* XXX reduce to pack Cyclom-8Ys */
#define LOTS_OF_EVENTS 64 /* helps separate urgent events from input */
#define RB_I_HIGH_WATER (TTYHOG - 2 * RS_IBUFSIZE)
#define RS_IBUFSIZE 256
#define CALLOUT_MASK 0x80
#define CONTROL_MASK 0x60
#define CONTROL_INIT_STATE 0x20
#define CONTROL_LOCK_STATE 0x40
#define DEV_TO_UNIT(dev) (MINOR_TO_UNIT(minor(dev)))
#define MINOR_MAGIC_MASK (CALLOUT_MASK | CONTROL_MASK)
#define MINOR_TO_UNIT(mynor) ((mynor) & ~MINOR_MAGIC_MASK)
/*
* Input buffer watermarks.
* The external device is asked to stop sending when the buffer exactly reaches
* high water, or when the high level requests it.
* The high level is notified immediately (rather than at a later clock tick)
* when this watermark is reached.
* The buffer size is chosen so the watermark should almost never be reached.
* The low watermark is invisibly 0 since the buffer is always emptied all at
* once.
*/
#define RS_IHIGHWATER (3 * RS_IBUFSIZE / 4)
/*
* com state bits.
* (CS_BUSY | CS_TTGO) and (CS_BUSY | CS_TTGO | CS_ODEVREADY) must be higher
* than the other bits so that they can be tested as a group without masking
* off the low bits.
*
* The following com and tty flags correspond closely:
* CS_BUSY = TS_BUSY (maintained by comstart(), siopoll() and
* siostop())
* CS_TTGO = ~TS_TTSTOP (maintained by comparam() and comstart())
* CS_CTS_OFLOW = CCTS_OFLOW (maintained by comparam())
* CS_RTS_IFLOW = CRTS_IFLOW (maintained by comparam())
* TS_FLUSH is not used.
* XXX I think TIOCSETA doesn't clear TS_TTSTOP when it clears IXON.
* XXX CS_*FLOW should be CF_*FLOW in com->flags (control flags not state).
*/
#define CS_BUSY 0x80 /* output in progress */
#define CS_TTGO 0x40 /* output not stopped by XOFF */
#define CS_ODEVREADY 0x20 /* external device h/w ready (CTS) */
#define CS_CHECKMSR 1 /* check of MSR scheduled */
#define CS_CTS_OFLOW 2 /* use CTS output flow control */
#define CS_DTR_OFF 0x10 /* DTR held off */
#define CS_ODONE 4 /* output completed */
#define CS_RTS_IFLOW 8 /* use RTS input flow control */
static char const * const error_desc[] = {
#define CE_OVERRUN 0
"silo overflow",
#define CE_INTERRUPT_BUF_OVERFLOW 1
"interrupt-level buffer overflow",
#define CE_TTY_BUF_OVERFLOW 2
"tty-level buffer overflow",
};
#define CE_NTYPES 3
#define CE_RECORD(com, errnum) (++(com)->delta_error_counts[errnum])
/* types. XXX - should be elsewhere */
typedef u_char bool_t; /* boolean */
typedef u_char volatile *cy_addr;
/* queue of linear buffers */
struct lbq {
u_char *l_head; /* next char to process */
u_char *l_tail; /* one past the last char to process */
struct lbq *l_next; /* next in queue */
bool_t l_queued; /* nonzero if queued */
};
/* com device structure */
struct com_s {
u_char state; /* miscellaneous flag bits */
bool_t active_out; /* nonzero if the callout device is open */
#if 0
u_char cfcr_image; /* copy of value written to CFCR */
u_char ftl; /* current rx fifo trigger level */
u_char ftl_init; /* ftl_max for next open() */
u_char ftl_max; /* maximum ftl for curent open() */
bool_t hasfifo; /* nonzero for 16550 UARTs */
bool_t loses_outints; /* nonzero if device loses output interrupts */
#endif
u_char mcr_image; /* copy of value written to MCR */
#if 0
#ifdef COM_MULTIPORT
bool_t multiport; /* is this unit part of a multiport device? */
#endif /* COM_MULTIPORT */
bool_t no_irq; /* nonzero if irq is not attached */
bool_t poll; /* nonzero if polling is required */
bool_t poll_output; /* nonzero if polling for output is required */
#endif
int unit; /* unit number */
int dtr_wait; /* time to hold DTR down on close (* 1/hz) */
#if 0
u_int tx_fifo_size;
#endif
u_int wopeners; /* # processes waiting for DCD in open() */
/*
* The high level of the driver never reads status registers directly
* because there would be too many side effects to handle conveniently.
* Instead, it reads copies of the registers stored here by the
* interrupt handler.
*/
u_char last_modem_status; /* last MSR read by intr handler */
u_char prev_modem_status; /* last MSR handled by high level */
u_char hotchar; /* ldisc-specific char to be handled ASAP */
u_char *ibuf; /* start of input buffer */
u_char *ibufend; /* end of input buffer */
u_char *ihighwater; /* threshold in input buffer */
u_char *iptr; /* next free spot in input buffer */
struct lbq obufq; /* head of queue of output buffers */
struct lbq obufs[2]; /* output buffers */
cy_addr cy_iobase; /* base address of this port's cyclom */
cy_addr iobase; /* base address of this port's cd1400 */
struct tty *tp; /* cross reference */
/* Initial state. */
struct termios it_in; /* should be in struct tty */
struct termios it_out;
/* Lock state. */
struct termios lt_in; /* should be in struct tty */
struct termios lt_out;
bool_t do_timestamp;
struct timeval timestamp;
u_long bytes_in; /* statistics */
u_long bytes_out;
u_int delta_error_counts[CE_NTYPES];
u_long error_counts[CE_NTYPES];
u_int recv_exception; /* exception chars received */
u_int mdm; /* modem signal changes */
#ifdef CyDebug
u_int start_count; /* no. of calls to comstart() */
u_int start_real; /* no. of calls that did something */
#endif
u_char channel_control;/* CD1400 CCR control command shadow */
u_char cor[3]; /* CD1400 COR1-3 shadows */
u_char intr_enable; /* CD1400 SRER shadow */
/*
* Ping-pong input buffers. The extra factor of 2 in the sizes is
* to allow for an error byte for each input byte.
*/
#define CE_INPUT_OFFSET RS_IBUFSIZE
u_char ibuf1[2 * RS_IBUFSIZE];
u_char ibuf2[2 * RS_IBUFSIZE];
/*
* Data area for output buffers. Someday we should build the output
* buffer queue without copying data.
*/
u_char obuf1[256];
u_char obuf2[256];
struct kern_devconf kdc;
};
/*
* XXX public functions in drivers should be declared in headers produced
* by `config', not here.
*/
/* Interrupt handling entry points. */
void siointr __P((int unit));
void siointrts __P((int unit));
void siopoll __P((void));
/* Device switch entry points. */
int sioopen __P((dev_t dev, int oflags, int devtype,
struct proc *p));
int sioclose __P((dev_t dev, int fflag, int devtype,
struct proc *p));
int sioread __P((dev_t dev, struct uio *uio, int ioflag));
int siowrite __P((dev_t dev, struct uio *uio, int ioflag));
int sioioctl __P((dev_t dev, int cmd, caddr_t data,
int fflag, struct proc *p));
void siostop __P((struct tty *tp, int rw));
#define sioreset noreset
struct tty *siodevtotty __P((dev_t dev));
#define siommap nommap
#define siostrategy nostrategy
static int sioattach __P((struct isa_device *dev));
static void cd1400_channel_cmd __P((cy_addr iobase, int cmd));
static timeout_t siodtrwakeup;
static void comhardclose __P((struct com_s *com));
static void siointr1 __P((struct com_s *com));
static int commctl __P((struct com_s *com, int bits, int how));
static int comparam __P((struct tty *tp, struct termios *t));
static int sioprobe __P((struct isa_device *dev));
static void sioregisterdev __P((struct isa_device *id));
static void siosettimeout __P((void));
static int comspeed __P((speed_t speed, int *prescaler_io));
static void comstart __P((struct tty *tp));
static timeout_t comwakeup;
static void disc_optim __P((struct tty *tp, struct termios *t,
struct com_s *com));
#ifdef CyDebug
void cystatus __P((int unit));
#endif
/* table and macro for fast conversion from a unit number to its com struct */
static struct com_s *p_com_addr[NSIO];
#define com_addr(unit) (p_com_addr[unit])
static struct timeval intr_timestamp;
struct isa_driver siodriver = {
sioprobe, sioattach, "cy"
};
#ifdef COMCONSOLE
#undef COMCONSOLE
#define COMCONSOLE 1
#else
#define COMCONSOLE 0
#endif
#ifndef CONUNIT
#define CONUNIT (0)
#endif
static int comconsole = CONUNIT;
static speed_t comdefaultrate = TTYDEF_SPEED;
static u_int com_events; /* input chars + weighted output completions */
static int commajor;
static int sio_timeout;
static int sio_timeouts_until_log;
#if 0 /* XXX */
static struct tty *sio_tty[NSIO];
#else
static struct tty sio_tty[NSIO];
static int nsio_tty = NSIO;
#endif
#ifdef KGDB
#include <machine/remote-sl.h>
extern int kgdb_dev;
extern int kgdb_rate;
extern int kgdb_debug_init;
#endif
#ifdef CyDebug
static u_int cd_inbs;
static u_int cy_inbs;
static u_int cd_outbs;
static u_int cy_outbs;
static u_int cy_svrr_probes;
static u_int cy_timeouts;
#endif
static int cy_nr_cd1400s[NCY];
#undef RxFifoThreshold
static int volatile RxFifoThreshold = (CD1400_RX_FIFO_SIZE / 2);
static struct kern_devconf kdc_sio[NCY] = { {
0, 0, 0, /* filled in by dev_attach */
"cyc", 0, { MDDT_ISA, 0, "tty" },
isa_generic_externalize, 0, 0, ISA_EXTERNALLEN,
&kdc_isa0, /* parent */
0, /* parentdata */
DC_UNCONFIGURED, /* state */
"Cyclades multiport board",
DC_CLS_MISC /* just an ordinary device */
} };
static void
sioregisterdev(id)
struct isa_device *id;
{
int unit;
unit = id->id_unit;
if (unit != 0)
kdc_sio[unit] = kdc_sio[0];
kdc_sio[unit].kdc_unit = unit;
kdc_sio[unit].kdc_isa = id;
dev_attach(&kdc_sio[unit]);
}
static int
sioprobe(dev)
struct isa_device *dev;
{
int cyu;
u_char firmware_version;
cy_addr iobase;
int unit;
unit = dev->id_unit;
if ((u_int)unit >= NCY)
return (0);
cy_nr_cd1400s[unit] = 0;
sioregisterdev(dev);
/* Cyclom-16Y hardware reset (Cyclom-8Ys don't care) */
cy_inb((cy_addr)dev->id_maddr, CY16_RESET); /* XXX? */
DELAY(500); /* wait for the board to get its act together */
for (cyu = 0, iobase = (cy_addr)dev->id_maddr; cyu < CY_MAX_CD1400s;
++cyu, iobase += CY_CD1400_MEMSIZE) {
int i;
/* wait for chip to become ready for new command */
for (i = 0; i < 100; i += 50) {
DELAY(50);
if (!cd_inb(iobase, CD1400_CCR))
break;
}
/* clear the GFRCR register */
cd_outb(iobase, CD1400_GFRCR, 0);
/* issue a reset command */
cd_outb(iobase, CD1400_CCR,
CD1400_CCR_CMDRESET | CD1400_CCR_FULLRESET);
/* wait for the CD1400 to initialize itself */
for (i = 0; i < 1000; i += 50) {
DELAY(50);
/* retrieve firmware version */
firmware_version = cd_inb(iobase, CD1400_GFRCR);
if (firmware_version != 0)
break;
}
/*
* Anything in the 0x40-0x4F range is fine.
* If one CD1400 is bad then we don't support higher
* numbered good ones on this board.
*/
if ((firmware_version & 0xF0) != 0x40)
break;
++cy_nr_cd1400s[unit];
}
return (cy_nr_cd1400s[unit] == 0 ? 0 : -1);
}
static int
sioattach(isdp)
struct isa_device *isdp;
{
int cyu;
cy_addr cy_iobase;
cy_addr iobase;
int ncyu;
int unit;
unit = isdp->id_unit;
if ((u_int)unit >= NCY)
return (0);
ncyu = cy_nr_cd1400s[unit];
if (ncyu == 0)
return (0);
isdp->id_ri_flags |= RI_FAST;
cy_iobase = (cy_addr)isdp->id_maddr;
unit *= CY_MAX_PORTS;
for (cyu = 0, iobase = cy_iobase; cyu < ncyu;
++cyu, iobase += CY_CD1400_MEMSIZE) {
int cdu;
/* Set up a receive timeout period of than 1+ ms. */
cd_outb(iobase, CD1400_PPR,
howmany(CY_CLOCK / CD1400_PPR_PRESCALER, 1000));
for (cdu = 0; cdu < CD1400_NO_OF_CHANNELS; ++cdu, ++unit) {
struct com_s *com;
int s;
com = malloc(sizeof *com, M_DEVBUF, M_NOWAIT);
if (com == NULL)
break;
bzero(com, sizeof *com);
com->unit = unit;
com->dtr_wait = 3 * hz;
com->iptr = com->ibuf = com->ibuf1;
com->ibufend = com->ibuf1 + RS_IBUFSIZE;
com->ihighwater = com->ibuf1 + RS_IHIGHWATER;
com->obufs[0].l_head = com->obuf1;
com->obufs[1].l_head = com->obuf2;
com->cy_iobase = cy_iobase;
com->iobase = iobase;
/*
* We don't use all the flags from <sys/ttydefaults.h> since they
* are only relevant for logins. It's important to have echo off
* initially so that the line doesn't start blathering before the
* echo flag can be turned off.
*/
com->it_in.c_iflag = 0;
com->it_in.c_oflag = 0;
com->it_in.c_cflag = TTYDEF_CFLAG;
com->it_in.c_lflag = 0;
if (unit == comconsole && (COMCONSOLE || boothowto & RB_SERIAL)) {
com->it_in.c_iflag = TTYDEF_IFLAG;
com->it_in.c_oflag = TTYDEF_OFLAG;
com->it_in.c_cflag = TTYDEF_CFLAG | CLOCAL;
com->it_in.c_lflag = TTYDEF_LFLAG;
com->lt_out.c_cflag = com->lt_in.c_cflag = CLOCAL;
}
termioschars(&com->it_in);
com->it_in.c_ispeed = com->it_in.c_ospeed = comdefaultrate;
com->it_out = com->it_in;
com->kdc = kdc_sio[0];
com->kdc.kdc_name = "cy";
com->kdc.kdc_unit = unit;
com->kdc.kdc_isa = isdp;
com->kdc.kdc_parent = &kdc_sio[isdp->id_unit];
com->kdc.kdc_state = DC_IDLE;
com->kdc.kdc_description =
"Serial port: Cirrus Logic CD1400";
com->kdc.kdc_class = DC_CLS_SERIAL;
dev_attach(&com->kdc);
s = spltty();
com_addr(unit) = com;
splx(s);
}
}
kdc_sio[isdp->id_unit].kdc_state = DC_BUSY; /* XXX */
/* ensure an edge for the next interrupt */
cy_outb(cy_iobase, CY_CLEAR_INTR, 0);
return (1);
}
int
sioopen(dev, flag, mode, p)
dev_t dev;
int flag;
int mode;
struct proc *p;
{
struct com_s *com;
int error;
cy_addr iobase;
int mynor;
int s;
struct tty *tp;
int unit;
mynor = minor(dev);
unit = MINOR_TO_UNIT(mynor);
if ((u_int) unit >= NSIO || (com = com_addr(unit)) == NULL)
return (ENXIO);
if (mynor & CONTROL_MASK)
return (0);
#if 0 /* XXX */
tp = com->tp = sio_tty[unit] = ttymalloc(sio_tty[unit]);
#else
tp = com->tp = &sio_tty[unit];
#endif
s = spltty();
/*
* We jump to this label after all non-interrupted sleeps to pick
* up any changes of the device state.
*/
open_top:
while (com->state & CS_DTR_OFF) {
error = tsleep(&com->dtr_wait, TTIPRI | PCATCH, "cydtr", 0);
if (error != 0)
goto out;
}
com->kdc.kdc_state = DC_BUSY;
if (tp->t_state & TS_ISOPEN) {
/*
* The device is open, so everything has been initialized.
* Handle conflicts.
*/
if (mynor & CALLOUT_MASK) {
if (!com->active_out) {
error = EBUSY;
goto out;
}
} else {
if (com->active_out) {
if (flag & O_NONBLOCK) {
error = EBUSY;
goto out;
}
error = tsleep(&com->active_out,
TTIPRI | PCATCH, "cybi", 0);
if (error != 0)
goto out;
goto open_top;
}
}
if (tp->t_state & TS_XCLUDE && p->p_ucred->cr_uid != 0) {
error = EBUSY;
goto out;
}
} else {
/*
* The device isn't open, so there are no conflicts.
* Initialize it. Initialization is done twice in many
* cases: to preempt sleeping callin opens if we are
* callout, and to complete a callin open after DCD rises.
*/
tp->t_oproc = comstart;
tp->t_param = comparam;
tp->t_dev = dev;
tp->t_termios = mynor & CALLOUT_MASK
? com->it_out : com->it_in;
#if 0
(void)commctl(com, TIOCM_DTR | TIOCM_RTS, DMSET);
com->ftl_max = com->ftl_init;
com->poll = com->no_irq;
com->poll_output = com->loses_outints;
#endif
++com->wopeners;
iobase = com->iobase;
/* reset this channel */
cd_outb(iobase, CD1400_CAR, unit & CD1400_CAR_CHAN);
cd1400_channel_cmd(iobase, CD1400_CCR_CMDRESET);
/*
* Resetting disables the transmitter and receiver as well as
* flushing the fifos so some of our cached state becomes
* invalid. The documentation suggests that all registers
* for the current channel are reset to defaults, but
* apparently none are. We wouldn't want DTR cleared.
*/
com->channel_control = 0;
/* Encode per-board unit in LIVR for access in intr routines. */
cd_outb(iobase, CD1400_LIVR,
(unit & CD1400_xIVR_CHAN) << CD1400_xIVR_CHAN_SHIFT);
/*
* raise dtr and generally set things up correctly. this
* has the side-effect of selecting the appropriate cd1400
* channel, to help us with subsequent channel control stuff
*/
error = comparam(tp, &tp->t_termios);
--com->wopeners;
if (error != 0)
goto out;
/*
* XXX we should goto open_top if comparam() slept.
*/
ttsetwater(tp);
#if 0
if (com->hasfifo) {
/*
* (Re)enable and drain fifos.
*
* Certain SMC chips cause problems if the fifos
* are enabled while input is ready. Turn off the
* fifo if necessary to clear the input. We test
* the input ready bit after enabling the fifos
* since we've already enabled them in comparam()
* and to handle races between enabling and fresh
* input.
*/
while (TRUE) {
outb(iobase + com_fifo,
FIFO_RCV_RST | FIFO_XMT_RST
| FIFO_ENABLE | com->ftl);
DELAY(100);
if (!(inb(com->line_status_port) & LSR_RXRDY))
break;
outb(iobase + com_fifo, 0);
DELAY(100);
(void) inb(com->data_port);
}
}
disable_intr();
(void) inb(com->line_status_port);
(void) inb(com->data_port);
com->prev_modem_status = com->last_modem_status
= inb(com->modem_status_port);
outb(iobase + com_ier, IER_ERXRDY | IER_ETXRDY | IER_ERLS
| IER_EMSC);
enable_intr();
#else /* !0 */
/* XXX raise RTS too */
(void)commctl(com, TIOCM_DTR | TIOCM_RTS, DMSET);
disable_intr();
com->prev_modem_status = com->last_modem_status
= cd_inb(iobase, CD1400_MSVR2);
cd_outb(iobase, CD1400_SRER,
com->intr_enable
= CD1400_SRER_MDMCH | CD1400_SRER_RXDATA);
enable_intr();
#endif /* 0 */
/*
* Handle initial DCD. Callout devices get a fake initial
* DCD (trapdoor DCD). If we are callout, then any sleeping
* callin opens get woken up and resume sleeping on "cybi"
* instead of "cydcd".
*/
/*
* XXX `mynor & CALLOUT_MASK' should be
* `tp->t_cflag & (SOFT_CARRIER | TRAPDOOR_CARRIER) where
* TRAPDOOR_CARRIER is the default initial state for callout
* devices and SOFT_CARRIER is like CLOCAL except it hides
* the true carrier.
*/
if (com->prev_modem_status & MSR_DCD || mynor & CALLOUT_MASK)
(*linesw[tp->t_line].l_modem)(tp, 1);
}
/*
* Wait for DCD if necessary.
*/
if (!(tp->t_state & TS_CARR_ON) && !(mynor & CALLOUT_MASK)
&& !(tp->t_cflag & CLOCAL) && !(flag & O_NONBLOCK)) {
++com->wopeners;
error = tsleep(TSA_CARR_ON(tp), TTIPRI | PCATCH, "cydcd", 0);
--com->wopeners;
if (error != 0)
goto out;
goto open_top;
}
error = (*linesw[tp->t_line].l_open)(dev, tp);
disc_optim(tp, &tp->t_termios, com);
if (tp->t_state & TS_ISOPEN && mynor & CALLOUT_MASK)
com->active_out = TRUE;
siosettimeout();
out:
splx(s);
if (!(tp->t_state & TS_ISOPEN) && com->wopeners == 0)
comhardclose(com);
return (error);
}
int
sioclose(dev, flag, mode, p)
dev_t dev;
int flag;
int mode;
struct proc *p;
{
struct com_s *com;
int mynor;
int s;
struct tty *tp;
mynor = minor(dev);
if (mynor & CONTROL_MASK)
return (0);
com = com_addr(MINOR_TO_UNIT(mynor));
tp = com->tp;
s = spltty();
(*linesw[tp->t_line].l_close)(tp, flag);
disc_optim(tp, &tp->t_termios, com);
siostop(tp, FREAD | FWRITE);
comhardclose(com);
ttyclose(tp);
siosettimeout();
splx(s);
#ifdef broken /* session holds a ref to the tty; can't deallocate */
ttyfree(tp);
com->tp = sio_tty[unit] = NULL;
#endif
return (0);
}
static void
comhardclose(com)
struct com_s *com;
{
cy_addr iobase;
int s;
struct tty *tp;
int unit;
unit = com->unit;
iobase = com->iobase;
s = spltty();
#if 0
com->poll = FALSE;
com->poll_output = FALSE;
#endif
com->do_timestamp = 0;
cd_outb(iobase, CD1400_CAR, unit & CD1400_CAR_CHAN);
#if 0
outb(iobase + com_cfcr, com->cfcr_image &= ~CFCR_SBREAK);
#endif
#ifdef KGDB
/* do not disable interrupts or hang up if debugging */
if (kgdb_dev != makedev(commajor, unit))
#endif
{
#if 0
outb(iobase + com_ier, 0);
#else
disable_intr();
cd_outb(iobase, CD1400_SRER, com->intr_enable = 0);
enable_intr();
#endif
tp = com->tp;
if (tp->t_cflag & HUPCL
/*
* XXX we will miss any carrier drop between here and the
* next open. Perhaps we should watch DCD even when the
* port is closed; it is not sufficient to check it at
* the next open because it might go up and down while
* we're not watching.
*/
|| !com->active_out
&& !(com->prev_modem_status & MSR_DCD)
&& !(com->it_in.c_cflag & CLOCAL)
|| !(tp->t_state & TS_ISOPEN)) {
(void)commctl(com, TIOCM_DTR, DMBIC);
/* Disable receiver (leave transmitter enabled). */
com->channel_control = CD1400_CCR_CMDCHANCTL
| CD1400_CCR_XMTEN
| CD1400_CCR_RCVDIS;
cd1400_channel_cmd(iobase, com->channel_control);
if (com->dtr_wait != 0) {
timeout(siodtrwakeup, com, com->dtr_wait);
com->state |= CS_DTR_OFF;
}
}
}
com->active_out = FALSE;
wakeup(&com->active_out);
wakeup(TSA_CARR_ON(tp)); /* restart any wopeners */
if (!(com->state & CS_DTR_OFF)
&& !(unit == comconsole && (COMCONSOLE || boothowto & RB_SERIAL)))
com->kdc.kdc_state = DC_IDLE;
splx(s);
}
int
sioread(dev, uio, flag)
dev_t dev;
struct uio *uio;
int flag;
{
int mynor;
struct tty *tp;
mynor = minor(dev);
if (mynor & CONTROL_MASK)
return (ENODEV);
tp = com_addr(MINOR_TO_UNIT(mynor))->tp;
return ((*linesw[tp->t_line].l_read)(tp, uio, flag));
}
int
siowrite(dev, uio, flag)
dev_t dev;
struct uio *uio;
int flag;
{
int mynor;
struct tty *tp;
int unit;
mynor = minor(dev);
if (mynor & CONTROL_MASK)
return (ENODEV);
unit = MINOR_TO_UNIT(mynor);
tp = com_addr(unit)->tp;
/*
* (XXX) We disallow virtual consoles if the physical console is
* a serial port. This is in case there is a display attached that
* is not the console. In that situation we don't need/want the X
* server taking over the console.
*/
if (constty && unit == comconsole
&& (COMCONSOLE || boothowto & RB_SERIAL))
constty = NULL;
#ifdef Smarts
/* XXX duplicate ttwrite(), but without so much output processing on
* CR & LF chars. Hardly worth the effort, given that high-throughput
* sessions are raw anyhow.
*/
#else
return ((*linesw[tp->t_line].l_write)(tp, uio, flag));
#endif
}
static void
siodtrwakeup(chan)
void *chan;
{
struct com_s *com;
com = (struct com_s *)chan;
com->state &= ~CS_DTR_OFF;
if (!(com->unit == comconsole && (COMCONSOLE || boothowto & RB_SERIAL)))
com->kdc.kdc_state = DC_IDLE;
wakeup(&com->dtr_wait);
}
/* Interrupt routine for timekeeping purposes */
void
siointrts(unit)
int unit;
{
/*
* XXX microtime() reenables CPU interrupts. We can't afford to
* be interrupted and don't want to slow down microtime(), so lock
* out interrupts in another way.
*/
outb(IO_ICU1 + 1, 0xff);
microtime(&intr_timestamp);
disable_intr();
outb(IO_ICU1 + 1, imen);
siointr(unit);
}
void
siointr(unit)
int unit;
{
int baseu;
cy_addr cy_iobase;
int cyu;
cy_addr iobase;
u_char status;
baseu = unit * CY_MAX_PORTS;
cy_iobase = com_addr(baseu)->cy_iobase;
/* check each CD1400 in turn */
for (cyu = 0, iobase = cy_iobase; cyu < cy_nr_cd1400s[unit];
++cyu, iobase += CY_CD1400_MEMSIZE) {
/* poll to see if it has any work */
status = cd_inb(iobase, CD1400_SVRR);
if (status == 0)
continue;
#ifdef CyDebug
++cy_svrr_probes;
#endif
/* service requests as appropriate, giving priority to RX */
if (status & CD1400_SVRR_RXRDY) {
struct com_s *com;
u_int count;
u_char *ioptr;
u_char line_status;
u_char recv_data;
u_char serv_type;
#ifdef PollMode
u_char save_car;
u_char save_rir;
#endif
#ifdef PollMode
save_rir = cd_inb(iobase, CD1400_RIR);
save_car = cd_inb(iobase, CD1400_CAR);
/* enter rx service */
cd_outb(iobase, CD1400_CAR, save_rir);
serv_type = cd_inb(iobase, CD1400_RIVR);
com = com_addr(baseu
+ ((serv_type >> CD1400_xIVR_CHAN_SHIFT)
& CD1400_xIVR_CHAN));
#else
/* ack receive service */
serv_type = cy_inb(iobase, CY8_SVCACKR);
com = com_addr(baseu +
+ ((serv_type >> CD1400_xIVR_CHAN_SHIFT)
& CD1400_xIVR_CHAN));
#endif
if (com->do_timestamp)
/* XXX a little bloat here... */
com->timestamp = intr_timestamp;
if (serv_type & CD1400_RIVR_EXCEPTION) {
++com->recv_exception;
line_status = cd_inb(iobase, CD1400_RDSR);
/* break/unnattached error bits or real input? */
recv_data = cd_inb(iobase, CD1400_RDSR);
#ifndef SOFT_HOTCHAR
if (line_status & CD1400_RDSR_SPECIAL
&& com->hotchar != 0)
setsofttty();
#endif
#if 1 /* XXX "intelligent" PFO error handling would break O error handling */
if (line_status & (LSR_PE|LSR_FE|LSR_BI)) {
/*
Don't store PE if IGNPAR and BI if IGNBRK,
this hack allows "raw" tty optimization
works even if IGN* is set.
*/
if ( com->tp == NULL
|| !(com->tp->t_state & TS_ISOPEN)
|| (line_status & (LSR_PE|LSR_FE))
&& (com->tp->t_iflag & IGNPAR)
|| (line_status & LSR_BI)
&& (com->tp->t_iflag & IGNBRK))
goto cont;
if ( (line_status & (LSR_PE|LSR_FE))
&& (com->tp->t_state & TS_CAN_BYPASS_L_RINT)
&& ((line_status & LSR_FE)
|| (line_status & LSR_PE)
&& (com->tp->t_iflag & INPCK)))
recv_data = 0;
}
#endif /* 1 */
++com->bytes_in;
#ifdef SOFT_HOTCHAR
if (com->hotchar != 0 && recv_data == com->hotchar)
setsofttty();
#endif
ioptr = com->iptr;
if (ioptr >= com->ibufend)
CE_RECORD(com, CE_INTERRUPT_BUF_OVERFLOW);
else {
++com_events;
ioptr[0] = recv_data;
ioptr[CE_INPUT_OFFSET] = line_status;
com->iptr = ++ioptr;
if (ioptr == com->ihighwater
&& com->state & CS_RTS_IFLOW)
#if 0
outb(com->modem_ctl_port,
com->mcr_image &= ~MCR_RTS);
#else
cd_outb(iobase, CD1400_MSVR1,
com->mcr_image &= ~MCR_RTS);
#endif
if (line_status & LSR_OE)
CE_RECORD(com, CE_OVERRUN);
}
goto cont;
} else {
int ifree;
count = cd_inb(iobase, CD1400_RDCR);
com->bytes_in += count;
ioptr = com->iptr;
ifree = com->ibufend - ioptr;
if (count > ifree) {
count -= ifree;
com_events += ifree;
while (ifree-- != 0) {
recv_data = cd_inb(iobase, CD1400_RDSR);
#ifdef SOFT_HOTCHAR
if (com->hotchar != 0
&& recv_data == com->hotchar)
setsofttty();
#endif
ioptr[0] = recv_data;
ioptr[CE_INPUT_OFFSET] = 0;
++ioptr;
}
com->delta_error_counts
[CE_INTERRUPT_BUF_OVERFLOW] += count;
do {
recv_data = cd_inb(iobase, CD1400_RDSR);
#ifdef SOFT_HOTCHAR
if (com->hotchar != 0
&& recv_data == com->hotchar)
setsofttty();
#endif
} while (--count != 0);
} else {
if (ioptr <= com->ihighwater
&& ioptr + count > com->ihighwater
&& com->state & CS_RTS_IFLOW)
#if 0
outb(com->modem_ctl_port,
com->mcr_image &= ~MCR_RTS);
#else
cd_outb(iobase, CD1400_MSVR1,
com->mcr_image &= ~MCR_RTS);
#endif
com_events += count;
do {
recv_data = cd_inb(iobase, CD1400_RDSR);
#ifdef SOFT_HOTCHAR
if (com->hotchar != 0
&& recv_data == com->hotchar)
setsofttty();
#endif
ioptr[0] = recv_data;
ioptr[CE_INPUT_OFFSET] = 0;
++ioptr;
} while (--count != 0);
}
com->iptr = ioptr;
}
cont:
/* terminate service context */
#ifdef PollMode
cd_outb(iobase, CD1400_RIR,
save_rir
& ~(CD1400_RIR_RDIREQ | CD1400_RIR_RBUSY));
cd_outb(iobase, CD1400_CAR, save_car);
#else
cd_outb(iobase, CD1400_EOSRR, 0);
#endif
}
if (status & CD1400_SVRR_MDMCH) {
struct com_s *com;
u_char modem_status;
#ifdef PollMode
u_char save_car;
u_char save_mir;
#else
u_char vector;
#endif
#ifdef PollMode
save_mir = cd_inb(iobase, CD1400_MIR);
save_car = cd_inb(iobase, CD1400_CAR);
/* enter modem service */
cd_outb(iobase, CD1400_CAR, save_mir);
com = com_addr(baseu + cyu * CD1400_NO_OF_CHANNELS
+ (save_mir & CD1400_MIR_CHAN));
#else
/* ack modem service */
vector = cy_inb(iobase, CY8_SVCACKM);
com = com_addr(baseu
+ ((vector >> CD1400_xIVR_CHAN_SHIFT)
& CD1400_xIVR_CHAN));
#endif
++com->mdm;
modem_status = cd_inb(iobase, CD1400_MSVR2);
if (modem_status != com->last_modem_status) {
/*
* Schedule high level to handle DCD changes. Note
* that we don't use the delta bits anywhere. Some
* UARTs mess them up, and it's easy to remember the
* previous bits and calculate the delta.
*/
com->last_modem_status = modem_status;
if (!(com->state & CS_CHECKMSR)) {
com_events += LOTS_OF_EVENTS;
com->state |= CS_CHECKMSR;
setsofttty();
}
#ifdef SOFT_CTS_OFLOW
/* handle CTS change immediately for crisp flow ctl */
if (com->state & CS_CTS_OFLOW) {
if (modem_status & MSR_CTS) {
com->state |= CS_ODEVREADY;
if (com->state >= (CS_BUSY | CS_TTGO
| CS_ODEVREADY)
&& !(com->intr_enable
& CD1400_SRER_TXRDY))
cd_outb(iobase, CD1400_SRER,
com->intr_enable
|= CD1400_SRER_TXRDY);
} else {
com->state &= ~CS_ODEVREADY;
if (com->intr_enable & CD1400_SRER_TXRDY)
cd_outb(iobase, CD1400_SRER,
com->intr_enable
&= ~CD1400_SRER_TXRDY);
}
}
#endif
}
/* terminate service context */
#ifdef PollMode
cd_outb(iobase, CD1400_MIR,
save_mir
& ~(CD1400_MIR_RDIREQ | CD1400_MIR_RBUSY));
cd_outb(iobase, CD1400_CAR, save_car);
#else
cd_outb(iobase, CD1400_EOSRR, 0);
#endif
}
if (status & CD1400_SVRR_TXRDY) {
struct com_s *com;
#ifdef PollMode
u_char save_car;
u_char save_tir;
#else
u_char vector;
#endif
#ifdef PollMode
save_tir = cd_inb(iobase, CD1400_TIR);
save_car = cd_inb(iobase, CD1400_CAR);
/* enter tx service */
cd_outb(iobase, CD1400_CAR, save_tir);
com = com_addr(baseu
+ cyu * CD1400_NO_OF_CHANNELS
+ (save_tir & CD1400_TIR_CHAN));
#else
/* ack transmit service */
vector = cy_inb(iobase, CY8_SVCACKT);
com = com_addr(baseu
+ ((vector >> CD1400_xIVR_CHAN_SHIFT)
& CD1400_xIVR_CHAN));
#endif
if (com->state >= (CS_BUSY | CS_TTGO | CS_ODEVREADY)) {
u_char *ioptr;
u_int ocount;
ioptr = com->obufq.l_head;
ocount = com->obufq.l_tail - ioptr;
if (ocount > CD1400_TX_FIFO_SIZE)
ocount = CD1400_TX_FIFO_SIZE;
com->bytes_out += ocount;
do
cd_outb(iobase, CD1400_TDR, *ioptr++);
while (--ocount != 0);
com->obufq.l_head = ioptr;
if (ioptr >= com->obufq.l_tail) {
struct lbq *qp;
qp = com->obufq.l_next;
qp->l_queued = FALSE;
qp = qp->l_next;
if (qp != NULL) {
com->obufq.l_head = qp->l_head;
com->obufq.l_tail = qp->l_tail;
com->obufq.l_next = qp;
} else {
/* output just completed */
com->state &= ~CS_BUSY;
cd_outb(iobase, CD1400_SRER,
com->intr_enable
&= ~CD1400_SRER_TXRDY);
}
if (!(com->state & CS_ODONE)) {
com_events += LOTS_OF_EVENTS;
com->state |= CS_ODONE;
setsofttty(); /* handle at high level ASAP */
}
}
}
/* terminate service context */
#ifdef PollMode
cd_outb(iobase, CD1400_TIR,
save_tir
& ~(CD1400_TIR_RDIREQ | CD1400_TIR_RBUSY));
cd_outb(iobase, CD1400_CAR, save_car);
#else
cd_outb(iobase, CD1400_EOSRR, 0);
#endif
}
}
/* ensure an edge for the next interrupt */
cy_outb(cy_iobase, CY_CLEAR_INTR, 0);
schedsofttty();
}
static void
siointr1(com)
struct com_s *com;
{
}
int
sioioctl(dev, cmd, data, flag, p)
dev_t dev;
int cmd;
caddr_t data;
int flag;
struct proc *p;
{
struct com_s *com;
int error;
cy_addr iobase;
int mynor;
int s;
struct tty *tp;
#if defined(COMPAT_43) || defined(COMPAT_SUNOS)
int oldcmd;
struct termios term;
#endif
mynor = minor(dev);
com = com_addr(MINOR_TO_UNIT(mynor));
iobase = com->iobase;
if (mynor & CONTROL_MASK) {
struct termios *ct;
switch (mynor & CONTROL_MASK) {
case CONTROL_INIT_STATE:
ct = mynor & CALLOUT_MASK ? &com->it_out : &com->it_in;
break;
case CONTROL_LOCK_STATE:
ct = mynor & CALLOUT_MASK ? &com->lt_out : &com->lt_in;
break;
default:
return (ENODEV); /* /dev/nodev */
}
switch (cmd) {
case TIOCSETA:
error = suser(p->p_ucred, &p->p_acflag);
if (error != 0)
return (error);
*ct = *(struct termios *)data;
return (0);
case TIOCGETA:
*(struct termios *)data = *ct;
return (0);
case TIOCGETD:
*(int *)data = TTYDISC;
return (0);
case TIOCGWINSZ:
bzero(data, sizeof(struct winsize));
return (0);
default:
return (ENOTTY);
}
}
tp = com->tp;
#if defined(COMPAT_43) || defined(COMPAT_SUNOS)
term = tp->t_termios;
oldcmd = cmd;
error = ttsetcompat(tp, &cmd, data, &term);
if (error != 0)
return (error);
if (cmd != oldcmd)
data = (caddr_t)&term;
#endif
if (cmd == TIOCSETA || cmd == TIOCSETAW || cmd == TIOCSETAF) {
int cc;
struct termios *dt = (struct termios *)data;
struct termios *lt = mynor & CALLOUT_MASK
? &com->lt_out : &com->lt_in;
dt->c_iflag = (tp->t_iflag & lt->c_iflag)
| (dt->c_iflag & ~lt->c_iflag);
dt->c_oflag = (tp->t_oflag & lt->c_oflag)
| (dt->c_oflag & ~lt->c_oflag);
dt->c_cflag = (tp->t_cflag & lt->c_cflag)
| (dt->c_cflag & ~lt->c_cflag);
dt->c_lflag = (tp->t_lflag & lt->c_lflag)
| (dt->c_lflag & ~lt->c_lflag);
for (cc = 0; cc < NCCS; ++cc)
if (lt->c_cc[cc] != 0)
dt->c_cc[cc] = tp->t_cc[cc];
if (lt->c_ispeed != 0)
dt->c_ispeed = tp->t_ispeed;
if (lt->c_ospeed != 0)
dt->c_ospeed = tp->t_ospeed;
}
error = (*linesw[tp->t_line].l_ioctl)(tp, cmd, data, flag, p);
if (error >= 0)
return (error);
s = spltty();
error = ttioctl(tp, cmd, data, flag);
disc_optim(tp, &tp->t_termios, com);
if (error >= 0) {
splx(s);
return (error);
}
cd_outb(iobase, CD1400_CAR, MINOR_TO_UNIT(mynor) & CD1400_CAR_CHAN);
switch (cmd) {
#if 0
case TIOCSBRK:
outb(iobase + com_cfcr, com->cfcr_image |= CFCR_SBREAK);
break;
case TIOCCBRK:
outb(iobase + com_cfcr, com->cfcr_image &= ~CFCR_SBREAK);
break;
#endif /* 0 */
case TIOCSDTR:
(void)commctl(com, TIOCM_DTR, DMBIS);
break;
case TIOCCDTR:
(void)commctl(com, TIOCM_DTR, DMBIC);
break;
case TIOCMSET:
(void)commctl(com, *(int *)data, DMSET);
break;
case TIOCMBIS:
(void)commctl(com, *(int *)data, DMBIS);
break;
case TIOCMBIC:
(void)commctl(com, *(int *)data, DMBIC);
break;
case TIOCMGET:
*(int *)data = commctl(com, 0, DMGET);
break;
case TIOCMSDTRWAIT:
/* must be root since the wait applies to following logins */
error = suser(p->p_ucred, &p->p_acflag);
if (error != 0) {
splx(s);
return (error);
}
com->dtr_wait = *(int *)data * hz / 100;
break;
case TIOCMGDTRWAIT:
*(int *)data = com->dtr_wait * 100 / hz;
break;
case TIOCTIMESTAMP:
com->do_timestamp = TRUE;
*(struct timeval *)data = com->timestamp;
break;
default:
splx(s);
return (ENOTTY);
}
splx(s);
return (0);
}
void
siopoll()
{
int unit;
#ifdef CyDebug
++cy_timeouts;
#endif
if (com_events == 0)
return;
repeat:
for (unit = 0; unit < NSIO; ++unit) {
u_char *buf;
struct com_s *com;
u_char *ibuf;
cy_addr iobase;
int incc;
struct tty *tp;
com = com_addr(unit);
if (com == NULL)
continue;
tp = com->tp;
if (tp == NULL) {
/*
* XXX forget any events related to closed devices
* (actually never opened devices) so that we don't
* loop.
*/
disable_intr();
incc = com->iptr - com->ibuf;
com->iptr = com->ibuf;
if (com->state & CS_CHECKMSR) {
incc += LOTS_OF_EVENTS;
com->state &= ~CS_CHECKMSR;
}
com_events -= incc;
enable_intr();
if (incc != 0)
log(LOG_DEBUG,
"sio%d: %d events for device with no tp\n",
unit, incc);
continue;
}
/* switch the role of the low-level input buffers */
if (com->iptr == (ibuf = com->ibuf)) {
buf = NULL; /* not used, but compiler can't tell */
incc = 0;
} else {
buf = ibuf;
disable_intr();
incc = com->iptr - buf;
com_events -= incc;
if (ibuf == com->ibuf1)
ibuf = com->ibuf2;
else
ibuf = com->ibuf1;
com->ibufend = ibuf + RS_IBUFSIZE;
com->ihighwater = ibuf + RS_IHIGHWATER;
com->iptr = ibuf;
/*
* There is now room for another low-level buffer full
* of input, so enable RTS if it is now disabled and
* there is room in the high-level buffer.
*/
/*
* XXX this used not to look at CS_RTS_IFLOW. The
* change is to allow full control of MCR_RTS via
* ioctls after turning CS_RTS_IFLOW off. Check
* for races. We shouldn't allow the ioctls while
* CS_RTS_IFLOW is on.
*/
if ((com->state & CS_RTS_IFLOW)
&& !(com->mcr_image & MCR_RTS)
&& !(tp->t_state & TS_TBLOCK))
#if 0
outb(com->modem_ctl_port,
com->mcr_image |= MCR_RTS);
#else
iobase = com->iobase,
cd_outb(iobase, CD1400_CAR,
unit & CD1400_CAR_CHAN),
cd_outb(iobase, CD1400_MSVR1,
com->mcr_image |= MCR_RTS);
#endif
enable_intr();
com->ibuf = ibuf;
}
if (com->state & CS_CHECKMSR) {
u_char delta_modem_status;
disable_intr();
delta_modem_status = com->last_modem_status
^ com->prev_modem_status;
com->prev_modem_status = com->last_modem_status;
com_events -= LOTS_OF_EVENTS;
com->state &= ~CS_CHECKMSR;
enable_intr();
if (delta_modem_status & MSR_DCD)
(*linesw[tp->t_line].l_modem)
(tp, com->prev_modem_status & MSR_DCD);
}
if (com->state & CS_ODONE) {
disable_intr();
com_events -= LOTS_OF_EVENTS;
com->state &= ~CS_ODONE;
if (!(com->state & CS_BUSY))
com->tp->t_state &= ~TS_BUSY;
enable_intr();
(*linesw[tp->t_line].l_start)(tp);
}
if (incc <= 0 || !(tp->t_state & TS_ISOPEN))
continue;
/*
* Avoid the grotesquely inefficient lineswitch routine
* (ttyinput) in "raw" mode. It usually takes about 450
* instructions (that's without canonical processing or echo!).
* slinput is reasonably fast (usually 40 instructions plus
* call overhead).
*/
if (tp->t_state & TS_CAN_BYPASS_L_RINT) {
if (tp->t_rawq.c_cc + incc >= RB_I_HIGH_WATER
&& (com->state & CS_RTS_IFLOW
|| tp->t_iflag & IXOFF)
&& !(tp->t_state & TS_TBLOCK))
ttyblock(tp);
tk_nin += incc;
tk_rawcc += incc;
tp->t_rawcc += incc;
com->delta_error_counts[CE_TTY_BUF_OVERFLOW]
+= b_to_q((char *)buf, incc, &tp->t_rawq);
ttwakeup(tp);
if (tp->t_state & TS_TTSTOP
&& (tp->t_iflag & IXANY
|| tp->t_cc[VSTART] == tp->t_cc[VSTOP])) {
tp->t_state &= ~TS_TTSTOP;
tp->t_lflag &= ~FLUSHO;
comstart(tp);
}
} else {
do {
u_char line_status;
int recv_data;
line_status = (u_char) buf[CE_INPUT_OFFSET];
recv_data = (u_char) *buf++;
if (line_status
& (LSR_BI | LSR_FE | LSR_OE | LSR_PE)) {
if (line_status & LSR_BI)
recv_data |= TTY_BI;
if (line_status & LSR_FE)
recv_data |= TTY_FE;
if (line_status & LSR_OE)
recv_data |= TTY_OE;
if (line_status & LSR_PE)
recv_data |= TTY_PE;
}
(*linesw[tp->t_line].l_rint)(recv_data, tp);
} while (--incc > 0);
}
if (com_events == 0)
break;
}
if (com_events >= LOTS_OF_EVENTS)
goto repeat;
}
static int
comparam(tp, t)
struct tty *tp;
struct termios *t;
{
int bits;
int cflag;
struct com_s *com;
u_char cor_change;
int idivisor;
int iflag;
cy_addr iobase;
int iprescaler;
int itimeout;
int odivisor;
int oprescaler;
u_char opt;
int s;
int unit;
/* do historical conversions */
if (t->c_ispeed == 0)
t->c_ispeed = t->c_ospeed;
/* check requested parameters */
idivisor = comspeed(t->c_ispeed, &iprescaler);
if (idivisor < 0)
return (EINVAL);
odivisor = comspeed(t->c_ospeed, &oprescaler);
if (odivisor < 0)
return (EINVAL);
/* parameters are OK, convert them to the com struct and the device */
unit = DEV_TO_UNIT(tp->t_dev);
com = com_addr(unit);
iobase = com->iobase;
s = spltty();
cd_outb(iobase, CD1400_CAR, unit & CD1400_CAR_CHAN);
if (odivisor == 0)
(void)commctl(com, TIOCM_DTR, DMBIC); /* hang up line */
else
(void)commctl(com, TIOCM_DTR, DMBIS);
cd_outb(iobase, CD1400_RBPR, idivisor);
cd_outb(iobase, CD1400_RCOR, iprescaler);
cd_outb(iobase, CD1400_TBPR, odivisor);
cd_outb(iobase, CD1400_TCOR, oprescaler);
/*
* channel control
* receiver enable
* transmitter enable (always set)
*/
cflag = t->c_cflag;
opt = CD1400_CCR_CMDCHANCTL | CD1400_CCR_XMTEN
| (cflag & CREAD ? CD1400_CCR_RCVEN : CD1400_CCR_RCVDIS);
if (opt != com->channel_control) {
com->channel_control = opt;
cd1400_channel_cmd(iobase, opt);
}
#ifdef Smarts
/* set special chars */
/* XXX if one is _POSIX_VDISABLE, can't use some others */
if (t->c_cc[VSTOP] != _POSIX_VDISABLE)
cd_outb(iobase, CD1400_SCHR1, t->c_cc[VSTOP]);
if (t->c_cc[VSTART] != _POSIX_VDISABLE)
cd_outb(iobase, CD1400_SCHR2, t->c_cc[VSTART]);
if (t->c_cc[VINTR] != _POSIX_VDISABLE)
cd_outb(iobase, CD1400_SCHR3, t->c_cc[VINTR]);
if (t->c_cc[VSUSP] != _POSIX_VDISABLE)
cd_outb(iobase, CD1400_SCHR4, t->c_cc[VSUSP]);
#endif
/*
* set channel option register 1 -
* parity mode
* stop bits
* char length
*/
opt = 0;
/* parity */
if (cflag & PARENB) {
if (cflag & PARODD)
opt |= CD1400_COR1_PARODD;
opt |= CD1400_COR1_PARNORMAL;
}
iflag = t->c_iflag;
if (!(iflag & INPCK))
opt |= CD1400_COR1_NOINPCK;
bits = 1 + 1;
/* stop bits */
if (cflag & CSTOPB) {
++bits;
opt |= CD1400_COR1_STOP2;
}
/* char length */
switch (cflag & CSIZE) {
case CS5:
bits += 5;
opt |= CD1400_COR1_CS5;
break;
case CS6:
bits += 6;
opt |= CD1400_COR1_CS6;
break;
case CS7:
bits += 7;
opt |= CD1400_COR1_CS7;
break;
default:
bits += 8;
opt |= CD1400_COR1_CS8;
break;
}
cor_change = 0;
if (opt != com->cor[0]) {
cor_change |= CD1400_CCR_COR1;
cd_outb(iobase, CD1400_COR1, com->cor[0] = opt);
}
/*
* Set receive time-out period, normally to max(one char time, 5 ms).
*/
if (t->c_ispeed == 0)
itimeout = cd_inb(iobase, CD1400_RTPR);
else {
itimeout = (1000 * bits + t->c_ispeed - 1) / t->c_ispeed;
#ifdef SOFT_HOTCHAR
#define MIN_RTP 1
#else
#define MIN_RTP 5
#endif
if (itimeout < MIN_RTP)
itimeout = MIN_RTP;
}
if (!(t->c_lflag & ICANON) && t->c_cc[VMIN] != 0 && t->c_cc[VTIME] != 0
&& t->c_cc[VTIME] * 10 > itimeout)
itimeout = t->c_cc[VTIME] * 10;
if (itimeout > 255)
itimeout = 255;
cd_outb(iobase, CD1400_RTPR, itimeout);
/*
* set channel option register 2 -
* flow control
*/
opt = 0;
#ifdef Smarts
if (iflag & IXANY)
opt |= CD1400_COR2_IXANY;
if (iflag & IXOFF)
opt |= CD1400_COR2_IXOFF;
#endif
#ifndef SOFT_CTS_OFLOW
if (cflag & CCTS_OFLOW)
opt |= CD1400_COR2_CCTS_OFLOW;
#endif
if (opt != com->cor[1]) {
cor_change |= CD1400_CCR_COR2;
cd_outb(iobase, CD1400_COR2, com->cor[1] = opt);
}
/*
* set channel option register 3 -
* receiver FIFO interrupt threshold
* flow control
*/
opt = RxFifoThreshold;
#ifdef Smarts
if (t->c_lflag & ICANON)
opt |= CD1400_COR3_SCD34; /* detect INTR & SUSP chars */
if (iflag & IXOFF)
/* detect and transparently handle START and STOP chars */
opt |= CD1400_COR3_FCT | CD1400_COR3_SCD12;
#endif
if (opt != com->cor[2]) {
cor_change |= CD1400_CCR_COR3;
cd_outb(iobase, CD1400_COR3, com->cor[2] = opt);
}
/* notify the CD1400 if COR1-3 have changed */
if (cor_change)
cd1400_channel_cmd(iobase, CD1400_CCR_CMDCORCHG | cor_change);
/*
* set channel option register 4 -
* CR/NL processing
* break processing
* received exception processing
*/
opt = 0;
if (iflag & IGNCR)
opt |= CD1400_COR4_IGNCR;
#ifdef Smarts
/*
* we need a new ttyinput() for this, as we don't want to
* have ICRNL && INLCR being done in both layers, or to have
* synchronisation problems
*/
if (iflag & ICRNL)
opt |= CD1400_COR4_ICRNL;
if (iflag & INLCR)
opt |= CD1400_COR4_INLCR;
#endif
if (iflag & IGNBRK)
opt |= CD1400_COR4_IGNBRK;
if (!(iflag & BRKINT))
opt |= CD1400_COR4_NOBRKINT;
#if 0
/* XXX using this "intelligence" breaks reporting of overruns. */
if (iflag & IGNPAR)
opt |= CD1400_COR4_PFO_DISCARD;
else {
if (iflag & PARMRK)
opt |= CD1400_COR4_PFO_ESC;
else
opt |= CD1400_COR4_PFO_NUL;
}
#else
opt |= CD1400_COR4_PFO_EXCEPTION;
#endif
cd_outb(iobase, CD1400_COR4, opt);
/*
* set channel option register 5 -
*/
opt = 0;
if (iflag & ISTRIP)
opt |= CD1400_COR5_ISTRIP;
if (t->c_iflag & IEXTEN)
/* enable LNEXT (e.g. ctrl-v quoting) handling */
opt |= CD1400_COR5_LNEXT;
#ifdef Smarts
if (t->c_oflag & ONLCR)
opt |= CD1400_COR5_ONLCR;
if (t->c_oflag & OCRNL)
opt |= CD1400_COR5_OCRNL;
#endif
cd_outb(iobase, CD1400_COR5, opt);
/*
* XXX we probably alway want to track carrier changes, so that
* TS_CARR_ON gives the true carrier. If we don't track them,
* then we should set TS_CARR_ON when CLOCAL drops.
*/
/*
* set modem change option register 1
* generate modem interrupts on which 1 -> 0 input transitions
* also controls auto-DTR output flow-control, which we don't use
*/
opt = cflag & CLOCAL ? 0 : CD1400_MCOR1_CDzd;
#ifdef SOFT_CTS_OFLOW
if (cflag & CCTS_OFLOW)
opt |= CD1400_MCOR1_CTSzd;
#endif
cd_outb(iobase, CD1400_MCOR1, opt);
/*
* set modem change option register 2
* generate modem interrupts on specific 0 -> 1 input transitions
*/
opt = cflag & CLOCAL ? 0 : CD1400_MCOR2_CDod;
#ifdef SOFT_CTS_OFLOW
if (cflag & CCTS_OFLOW)
opt |= CD1400_MCOR2_CTSod;
#endif
cd_outb(iobase, CD1400_MCOR2, opt);
/*
* XXX should have done this long ago, but there is too much state
* to change all atomically.
*/
disable_intr();
com->state &= ~CS_TTGO;
if (!(tp->t_state & TS_TTSTOP))
com->state |= CS_TTGO;
if (cflag & CRTS_IFLOW)
com->state |= CS_RTS_IFLOW; /* XXX - secondary changes? */
else
com->state &= ~CS_RTS_IFLOW;
/*
* Set up state to handle output flow control.
* XXX - worth handling MDMBUF (DCD) flow control at the lowest level?
* Now has 10+ msec latency, while CTS flow has 50- usec latency.
*/
com->state |= CS_ODEVREADY;
#ifdef SOFT_CTS_OFLOW
com->state &= ~CS_CTS_OFLOW;
if (cflag & CCTS_OFLOW) {
com->state |= CS_CTS_OFLOW;
if (!(com->last_modem_status & MSR_CTS))
com->state &= ~CS_ODEVREADY;
}
#endif
/* XXX shouldn't call functions while intrs are disabled. */
disc_optim(tp, t, com);
#if 0
/*
* Recover from fiddling with CS_TTGO. We used to call siointr1()
* unconditionally, but that defeated the careful discarding of
* stale input in sioopen().
*/
if (com->state >= (CS_BUSY | CS_TTGO))
siointr1(com);
#endif
if (com->state >= (CS_BUSY | CS_TTGO | CS_ODEVREADY)) {
if (!(com->intr_enable & CD1400_SRER_TXRDY))
cd_outb(iobase, CD1400_SRER,
com->intr_enable |= CD1400_SRER_TXRDY);
} else {
if (com->intr_enable & CD1400_SRER_TXRDY)
cd_outb(iobase, CD1400_SRER,
com->intr_enable &= ~CD1400_SRER_TXRDY);
}
enable_intr();
splx(s);
return (0);
}
static void
comstart(tp)
struct tty *tp;
{
struct com_s *com;
cy_addr iobase;
int s;
#ifdef CyDebug
bool_t started;
#endif
int unit;
unit = DEV_TO_UNIT(tp->t_dev);
com = com_addr(unit);
iobase = com->iobase;
s = spltty();
#ifdef CyDebug
++com->start_count;
started = FALSE;
#endif
disable_intr();
cd_outb(iobase, CD1400_CAR, unit & CD1400_CAR_CHAN);
if (tp->t_state & TS_TTSTOP) {
com->state &= ~CS_TTGO;
if (com->intr_enable & CD1400_SRER_TXRDY)
cd_outb(iobase, CD1400_SRER,
com->intr_enable &= ~CD1400_SRER_TXRDY);
} else {
com->state |= CS_TTGO;
if (com->state >= (CS_BUSY | CS_TTGO | CS_ODEVREADY)
&& !(com->intr_enable & CD1400_SRER_TXRDY))
cd_outb(iobase, CD1400_SRER,
com->intr_enable |= CD1400_SRER_TXRDY);
}
if (tp->t_state & TS_TBLOCK) {
if (com->mcr_image & MCR_RTS && com->state & CS_RTS_IFLOW)
#if 0
outb(com->modem_ctl_port, com->mcr_image &= ~MCR_RTS);
#else
cd_outb(iobase, CD1400_MSVR1,
com->mcr_image &= ~MCR_RTS);
#endif
} else {
/*
* XXX don't raise MCR_RTS if CTS_RTS_IFLOW is off. Set it
* appropriately in comparam() if RTS-flow is being changed.
* Check for races.
*/
if (!(com->mcr_image & MCR_RTS) && com->iptr < com->ihighwater)
#if 0
outb(com->modem_ctl_port, com->mcr_image |= MCR_RTS);
#else
cd_outb(iobase, CD1400_MSVR1,
com->mcr_image |= MCR_RTS);
#endif
}
enable_intr();
if (tp->t_state & (TS_TIMEOUT | TS_TTSTOP)) {
splx(s);
return;
}
if (tp->t_outq.c_cc != 0) {
struct lbq *qp;
struct lbq *next;
if (!com->obufs[0].l_queued) {
#ifdef CyDebug
started = TRUE;
#endif
com->obufs[0].l_tail
= com->obuf1 + q_to_b(&tp->t_outq, com->obuf1,
sizeof com->obuf1);
com->obufs[0].l_next = NULL;
com->obufs[0].l_queued = TRUE;
disable_intr();
if (com->state & CS_BUSY) {
qp = com->obufq.l_next;
while ((next = qp->l_next) != NULL)
qp = next;
qp->l_next = &com->obufs[0];
} else {
com->obufq.l_head = com->obufs[0].l_head;
com->obufq.l_tail = com->obufs[0].l_tail;
com->obufq.l_next = &com->obufs[0];
com->state |= CS_BUSY;
if (com->state >= (CS_BUSY | CS_TTGO
| CS_ODEVREADY))
cd_outb(iobase, CD1400_SRER,
com->intr_enable
|= CD1400_SRER_TXRDY);
}
enable_intr();
}
if (tp->t_outq.c_cc != 0 && !com->obufs[1].l_queued) {
#ifdef CyDebug
started = TRUE;
#endif
com->obufs[1].l_tail
= com->obuf2 + q_to_b(&tp->t_outq, com->obuf2,
sizeof com->obuf2);
com->obufs[1].l_next = NULL;
com->obufs[1].l_queued = TRUE;
disable_intr();
if (com->state & CS_BUSY) {
qp = com->obufq.l_next;
while ((next = qp->l_next) != NULL)
qp = next;
qp->l_next = &com->obufs[1];
} else {
com->obufq.l_head = com->obufs[1].l_head;
com->obufq.l_tail = com->obufs[1].l_tail;
com->obufq.l_next = &com->obufs[1];
com->state |= CS_BUSY;
if (com->state >= (CS_BUSY | CS_TTGO
| CS_ODEVREADY))
cd_outb(iobase, CD1400_SRER,
com->intr_enable
|= CD1400_SRER_TXRDY);
}
enable_intr();
}
tp->t_state |= TS_BUSY;
}
#ifdef CyDebug
if (started)
++com->start_real;
#endif
#if 0
disable_intr();
if (com->state >= (CS_BUSY | CS_TTGO)) {
siointr1(com); /* fake interrupt to start output */
enable_intr();
#endif
ttwwakeup(tp);
splx(s);
}
void
siostop(tp, rw)
struct tty *tp;
int rw;
{
struct com_s *com;
com = com_addr(DEV_TO_UNIT(tp->t_dev));
disable_intr();
if (rw & FWRITE) {
com->obufs[0].l_queued = FALSE;
com->obufs[1].l_queued = FALSE;
if (com->state & CS_ODONE)
com_events -= LOTS_OF_EVENTS;
com->state &= ~(CS_ODONE | CS_BUSY);
com->tp->t_state &= ~TS_BUSY;
}
if (rw & FREAD) {
com_events -= (com->iptr - com->ibuf);
com->iptr = com->ibuf;
}
enable_intr();
comstart(tp);
/* XXX should clear h/w fifos too. */
}
struct tty *
siodevtotty(dev)
dev_t dev;
{
int mynor;
int unit;
mynor = minor(dev);
if (mynor & CONTROL_MASK)
return (NULL);
unit = MINOR_TO_UNIT(mynor);
if ((u_int) unit >= NSIO)
return (NULL);
return (&sio_tty[unit]);
}
static int
commctl(com, bits, how)
struct com_s *com;
int bits;
int how;
{
cy_addr iobase;
int mcr;
int msr;
if (how == DMGET) {
if (com->channel_control & CD1400_CCR_RCVEN)
bits |= TIOCM_LE;
mcr = com->mcr_image;
if (mcr & MCR_DTR)
bits |= TIOCM_DTR;
if (mcr & MCR_RTS)
/* XXX wired on for Cyclom-8Ys */
bits |= TIOCM_RTS;
msr = com->prev_modem_status;
if (msr & MSR_CTS)
bits |= TIOCM_CTS;
if (msr & MSR_DCD)
bits |= TIOCM_CD;
if (msr & MSR_DSR)
bits |= TIOCM_DSR;
if (msr & MSR_RI)
/* XXX not connected except for Cyclom-16Y? */
bits |= TIOCM_RI;
return (bits);
}
iobase = com->iobase;
mcr = 0;
if (bits & TIOCM_DTR)
mcr |= MCR_DTR;
if (bits & TIOCM_RTS)
mcr |= MCR_RTS;
disable_intr();
switch (how) {
case DMSET:
com->mcr_image = mcr;
cd_outb(iobase, CD1400_MSVR1, mcr);
cd_outb(iobase, CD1400_MSVR2, mcr);
break;
case DMBIS:
com->mcr_image = mcr = com->mcr_image | mcr;
cd_outb(iobase, CD1400_MSVR1, mcr);
cd_outb(iobase, CD1400_MSVR2, mcr);
break;
case DMBIC:
com->mcr_image = mcr = com->mcr_image & ~mcr;
cd_outb(iobase, CD1400_MSVR1, mcr);
cd_outb(iobase, CD1400_MSVR2, mcr);
break;
}
enable_intr();
return (0);
}
static void
siosettimeout()
{
struct com_s *com;
bool_t someopen;
int unit;
/*
* Set our timeout period to 1 second if no polled devices are open.
* Otherwise set it to max(1/200, 1/hz).
* Enable timeouts iff some device is open.
*/
untimeout(comwakeup, (void *)NULL);
sio_timeout = hz;
someopen = FALSE;
for (unit = 0; unit < NSIO; ++unit) {
com = com_addr(unit);
if (com != NULL && com->tp != NULL
&& com->tp->t_state & TS_ISOPEN) {
someopen = TRUE;
#if 0
if (com->poll || com->poll_output) {
sio_timeout = hz > 200 ? hz / 200 : 1;
break;
}
#endif
}
}
if (someopen) {
sio_timeouts_until_log = hz / sio_timeout;
timeout(comwakeup, (void *)NULL, sio_timeout);
} else {
/* Flush error messages, if any. */
sio_timeouts_until_log = 1;
comwakeup((void *)NULL);
untimeout(comwakeup, (void *)NULL);
}
}
static void
comwakeup(chan)
void *chan;
{
struct com_s *com;
int unit;
timeout(comwakeup, (void *)NULL, sio_timeout);
#if 0
/*
* Recover from lost output interrupts.
* Poll any lines that don't use interrupts.
*/
for (unit = 0; unit < NSIO; ++unit) {
com = com_addr(unit);
if (com != NULL
&& (com->state >= (CS_BUSY | CS_TTGO) || com->poll)) {
disable_intr();
siointr1(com);
enable_intr();
}
}
#endif
/*
* Check for and log errors, but not too often.
*/
if (--sio_timeouts_until_log > 0)
return;
sio_timeouts_until_log = hz / sio_timeout;
for (unit = 0; unit < NSIO; ++unit) {
int errnum;
com = com_addr(unit);
if (com == NULL)
continue;
for (errnum = 0; errnum < CE_NTYPES; ++errnum) {
u_int delta;
u_long total;
disable_intr();
delta = com->delta_error_counts[errnum];
com->delta_error_counts[errnum] = 0;
enable_intr();
if (delta == 0)
continue;
total = com->error_counts[errnum] += delta;
log(LOG_ERR, "cy%d: %u more %s%s (total %lu)\n",
unit, delta, error_desc[errnum],
delta == 1 ? "" : "s", total);
#if 0
/*
* XXX if we resurrect this then we should move
* the dropping of the ftl to somewhere with less
* latency.
*/
if (errnum == CE_OVERRUN && com->hasfifo
&& com->ftl > FIFO_TRIGGER_1) {
static u_char ftl_in_bytes[] =
{ 1, 4, 8, 14, };
com->ftl_init = FIFO_TRIGGER_8;
#define FIFO_TRIGGER_DELTA FIFO_TRIGGER_4
com->ftl_max =
com->ftl -= FIFO_TRIGGER_DELTA;
outb(com->iobase + com_fifo,
FIFO_ENABLE | com->ftl);
log(LOG_DEBUG,
"sio%d: reduced fifo trigger level to %d\n",
unit,
ftl_in_bytes[com->ftl
/ FIFO_TRIGGER_DELTA]);
}
#endif
}
}
}
static void
disc_optim(tp, t, com)
struct tty *tp;
struct termios *t;
struct com_s *com;
{
#ifndef SOFT_HOTCHAR
cy_addr iobase;
u_char opt;
#endif
/*
* XXX can skip a lot more cases if Smarts. Maybe
* (IGNCR | ISTRIP | IXON) in c_iflag. But perhaps we
* shouldn't skip if (TS_CNTTB | TS_LNCH) is set in t_state.
*/
if (!(t->c_iflag & (ICRNL | IGNCR | IMAXBEL | INLCR | ISTRIP | IXON))
&& (!(t->c_iflag & BRKINT) || (t->c_iflag & IGNBRK))
&& (!(t->c_iflag & PARMRK)
|| (t->c_iflag & (IGNPAR | IGNBRK)) == (IGNPAR | IGNBRK))
&& !(t->c_lflag & (ECHO | ICANON | IEXTEN | ISIG | PENDIN))
&& linesw[tp->t_line].l_rint == ttyinput)
tp->t_state |= TS_CAN_BYPASS_L_RINT;
else
tp->t_state &= ~TS_CAN_BYPASS_L_RINT;
/*
* Prepare to reduce input latency for packet
* discplines with a end of packet character.
*/
if (tp->t_line == SLIPDISC)
com->hotchar = 0xc0;
else if (tp->t_line == PPPDISC)
com->hotchar = 0x7e;
else
com->hotchar = 0;
#ifndef SOFT_HOTCHAR
iobase = com->iobase;
cd_outb(iobase, CD1400_CAR, com->unit & CD1400_CAR_CHAN);
opt = com->cor[2] & ~CD1400_COR3_SCD34;
if (com->hotchar != 0) {
cd_outb(iobase, CD1400_SCHR3, com->hotchar);
cd_outb(iobase, CD1400_SCHR4, com->hotchar);
opt |= CD1400_COR3_SCD34;
}
if (opt != com->cor[2]) {
cd_outb(iobase, CD1400_COR3, com->cor[2] = opt);
cd1400_channel_cmd(com->iobase,
CD1400_CCR_CMDCORCHG | CD1400_CCR_COR3);
}
#endif
}
#ifdef Smarts
/* standard line discipline input routine */
int
cyinput(c, tp)
int c;
struct tty *tp;
{
/* XXX duplicate ttyinput(), but without the IXOFF/IXON/ISTRIP/IPARMRK
* bits, as they are done by the CD1400. Hardly worth the effort,
* given that high-throughput sessions are raw anyhow.
*/
}
#endif /* Smarts */
static int
comspeed(speed, prescaler_io)
speed_t speed;
int *prescaler_io;
{
int actual;
int error;
int divider;
int prescaler;
int prescaler_unit;
if (speed == 0)
return (0);
if (speed < 0 || speed > 150000)
return (-1);
/* determine which prescaler to use */
for (prescaler_unit = 4, prescaler = 2048; prescaler_unit;
prescaler_unit--, prescaler >>= 2) {
if (CY_CLOCK / prescaler / speed > 63)
break;
}
divider = (CY_CLOCK / prescaler * 2 / speed + 1) / 2; /* round off */
if (divider > 255)
divider = 255;
actual = CY_CLOCK/prescaler/divider;
error = ((actual - speed) * 2000 / speed + 1) / 2; /* percentage */
/* 3.0% max error tolerance */
if (error < -30 || error > 30)
return (-1);
#if 0
printf("prescaler = %d (%d)\n", prescaler, prescaler_unit);
printf("divider = %d (%x)\n", divider, divider);
printf("actual = %d\n", actual);
printf("error = %d\n", error);
#endif
*prescaler_io = prescaler_unit;
return (divider);
}
static void
cd1400_channel_cmd(iobase, cmd)
cy_addr iobase;
int cmd;
{
/* XXX hsu@clinet.fi: This is always more dependent on ISA bus speed,
as the card is probed every round? Replaced delaycount with 8k.
Either delaycount has to be implemented in FreeBSD or more sensible
way of doing these should be implemented. DELAY isn't enough here.
*/
u_int maxwait = 5 * 8 * 1024; /* approx. 5 ms */
/* wait for processing of previous command to complete */
while (cd_inb(iobase, CD1400_CCR) && maxwait--)
;
if (!maxwait)
log(LOG_ERR, "cy: channel command timeout (%d loops) - arrgh\n",
5 * 8 * 1024);
cd_outb(iobase, CD1400_CCR, cmd);
}
#ifdef CyDebug
/* useful in ddb */
void
cystatus(unit)
int unit;
{
struct com_s *com;
cy_addr iobase;
u_int ocount;
struct tty *tp;
com = com_addr(unit);
printf("info for channel %d\n", unit);
printf("------------------\n");
printf("total cyclom service probes:\t%d\n", cy_svrr_probes);
printf("calls to upper layer:\t\t%d\n", cy_timeouts);
if (com == NULL)
return;
iobase = com->iobase;
printf("\n");
printf("cd1400 base address:\\tt%p\n", iobase);
cd_outb(iobase, CD1400_CAR, unit & CD1400_CAR_CHAN);
printf("saved channel_control:\t\t0x%02x\n", com->channel_control);
printf("saved cor1-3:\t\t\t0x%02x 0x%02x 0x%02x\n",
com->cor[0], com->cor[1], com->cor[2]);
printf("service request enable reg:\t0x%02x (0x%02x cached)\n",
cd_inb(iobase, CD1400_SRER), com->intr_enable);
printf("service request register:\t0x%02x\n",
cd_inb(iobase, CD1400_SVRR));
printf("modem status:\t\t\t0x%02x (0x%02x cached)\n",
cd_inb(iobase, CD1400_MSVR2), com->prev_modem_status);
printf("rx/tx/mdm interrupt registers:\t0x%02x 0x%02x 0x%02x\n",
cd_inb(iobase, CD1400_RIR), cd_inb(iobase, CD1400_TIR),
cd_inb(iobase, CD1400_MIR));
printf("\n");
printf("com state:\t\t\t0x%02x\n", com->state);
printf("calls to comstart():\t\t%d (%d useful)\n",
com->start_count, com->start_real);
printf("rx buffer chars free:\t\t%d\n", com->iptr - com->ibuf);
ocount = 0;
if (com->obufs[0].l_queued)
ocount += com->obufs[0].l_tail - com->obufs[0].l_head;
if (com->obufs[1].l_queued)
ocount += com->obufs[1].l_tail - com->obufs[1].l_head;
printf("tx buffer chars:\t\t%u\n", ocount);
printf("received chars:\t\t\t%d\n", com->bytes_in);
printf("received exceptions:\t\t%d\n", com->recv_exception);
printf("modem signal deltas:\t\t%d\n", com->mdm);
printf("transmitted chars:\t\t%d\n", com->bytes_out);
printf("\n");
tp = com->tp;
if (tp != NULL) {
printf("tty state:\t\t\t0x%08x\n", tp->t_state);
printf("upper layer queue lengths:\t%d raw, %d canon, %d output\n",
tp->t_rawq.c_cc, tp->t_canq.c_cc, tp->t_outq.c_cc);
} else
printf("tty state:\t\t\tclosed\n");
}
#endif /* CyDebug */
#endif /* NCY > 0 */
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