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2714 lines
69 KiB
C
2714 lines
69 KiB
C
/*-
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* Copyright (c) 1991 The Regents of the University of California.
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* All rights reserved.
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*
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* Redistribution and use in source and binary forms, with or without
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* modification, are permitted provided that the following conditions
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* are met:
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* 1. Redistributions of source code must retain the above copyright
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* notice, this list of conditions and the following disclaimer.
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* 2. Redistributions in binary form must reproduce the above copyright
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* notice, this list of conditions and the following disclaimer in the
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* documentation and/or other materials provided with the distribution.
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* 3. All advertising materials mentioning features or use of this software
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* must display the following acknowledgement:
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* This product includes software developed by the University of
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* California, Berkeley and its contributors.
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* 4. Neither the name of the University nor the names of its contributors
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* may be used to endorse or promote products derived from this software
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* without specific prior written permission.
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*
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* THIS SOFTWARE IS PROVIDED BY THE REGENTS AND CONTRIBUTORS ``AS IS'' AND
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* ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
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* IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
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* ARE DISCLAIMED. IN NO EVENT SHALL THE REGENTS OR CONTRIBUTORS BE LIABLE
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* FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
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* DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
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* OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
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* HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
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* LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
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* OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
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* SUCH DAMAGE.
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*
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* from: @(#)com.c 7.5 (Berkeley) 5/16/91
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* $Id: sio.c,v 1.133 1996/01/04 21:11:37 wollman Exp $
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*/
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#include "sio.h"
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#include "opt_ddb.h"
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/*
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* Serial driver, based on 386BSD-0.1 com driver.
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* Mostly rewritten to use pseudo-DMA.
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* Works for National Semiconductor NS8250-NS16550AF UARTs.
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* COM driver, based on HP dca driver.
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*
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* Changes for PC-Card integration:
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* - Added PC-Card driver table and handlers
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*/
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#include <sys/param.h>
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#include <sys/systm.h>
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#include <sys/reboot.h>
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#include <sys/ioctl.h>
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#include <sys/tty.h>
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#include <sys/proc.h>
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#include <sys/conf.h>
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#include <sys/dkstat.h>
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#include <sys/file.h>
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#include <sys/uio.h>
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#include <sys/kernel.h>
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#include <sys/malloc.h>
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#include <sys/syslog.h>
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#include <sys/devconf.h>
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#ifdef DEVFS
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#include <sys/devfsext.h>
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#endif
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#include <machine/clock.h>
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#include <i386/isa/icu.h> /* XXX just to get at `imen' */
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#include <i386/isa/isa.h>
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#include <i386/isa/isa_device.h>
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#include <i386/isa/sioreg.h>
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#ifdef COM_ESP
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#include <i386/isa/ic/esp.h>
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#endif
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#include <i386/isa/ic/ns16550.h>
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#include "crd.h"
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#if NCRD > 0
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#include <pccard/card.h>
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#include <pccard/driver.h>
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#include <pccard/slot.h>
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#endif /* NCRD > 0 */
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#define LOTS_OF_EVENTS 64 /* helps separate urgent events from input */
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#define RB_I_HIGH_WATER (TTYHOG - 2 * RS_IBUFSIZE)
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#define RS_IBUFSIZE 256
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#define CALLOUT_MASK 0x80
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#define CONTROL_MASK 0x60
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#define CONTROL_INIT_STATE 0x20
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#define CONTROL_LOCK_STATE 0x40
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#define DEV_TO_UNIT(dev) (MINOR_TO_UNIT(minor(dev)))
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#define MINOR_MAGIC_MASK (CALLOUT_MASK | CONTROL_MASK)
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#define MINOR_TO_UNIT(mynor) ((mynor) & ~MINOR_MAGIC_MASK)
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#ifdef COM_MULTIPORT
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/* checks in flags for multiport and which is multiport "master chip"
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* for a given card
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*/
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#define COM_ISMULTIPORT(dev) ((dev)->id_flags & 0x01)
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#define COM_MPMASTER(dev) (((dev)->id_flags >> 8) & 0x0ff)
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#define COM_NOTAST4(dev) ((dev)->id_flags & 0x04)
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#endif /* COM_MULTIPORT */
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#define COM_LOSESOUTINTS(dev) ((dev)->id_flags & 0x08)
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#define COM_NOFIFO(dev) ((dev)->id_flags & 0x02)
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#define COM_VERBOSE(dev) ((dev)->id_flags & 0x80)
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#define com_scr 7 /* scratch register for 16450-16550 (R/W) */
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/*
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* Input buffer watermarks.
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* The external device is asked to stop sending when the buffer exactly reaches
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* high water, or when the high level requests it.
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* The high level is notified immediately (rather than at a later clock tick)
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* when this watermark is reached.
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* The buffer size is chosen so the watermark should almost never be reached.
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* The low watermark is invisibly 0 since the buffer is always emptied all at
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* once.
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*/
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#define RS_IHIGHWATER (3 * RS_IBUFSIZE / 4)
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/*
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* com state bits.
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* (CS_BUSY | CS_TTGO) and (CS_BUSY | CS_TTGO | CS_ODEVREADY) must be higher
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* than the other bits so that they can be tested as a group without masking
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* off the low bits.
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*
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* The following com and tty flags correspond closely:
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* CS_BUSY = TS_BUSY (maintained by comstart(), siopoll() and
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* siostop())
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* CS_TTGO = ~TS_TTSTOP (maintained by comparam() and comstart())
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* CS_CTS_OFLOW = CCTS_OFLOW (maintained by comparam())
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* CS_RTS_IFLOW = CRTS_IFLOW (maintained by comparam())
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* TS_FLUSH is not used.
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* XXX I think TIOCSETA doesn't clear TS_TTSTOP when it clears IXON.
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* XXX CS_*FLOW should be CF_*FLOW in com->flags (control flags not state).
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*/
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#define CS_BUSY 0x80 /* output in progress */
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#define CS_TTGO 0x40 /* output not stopped by XOFF */
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#define CS_ODEVREADY 0x20 /* external device h/w ready (CTS) */
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#define CS_CHECKMSR 1 /* check of MSR scheduled */
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#define CS_CTS_OFLOW 2 /* use CTS output flow control */
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#define CS_DTR_OFF 0x10 /* DTR held off */
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#define CS_ODONE 4 /* output completed */
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#define CS_RTS_IFLOW 8 /* use RTS input flow control */
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static char const * const error_desc[] = {
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#define CE_OVERRUN 0
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"silo overflow",
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#define CE_INTERRUPT_BUF_OVERFLOW 1
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"interrupt-level buffer overflow",
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#define CE_TTY_BUF_OVERFLOW 2
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"tty-level buffer overflow",
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};
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#define CE_NTYPES 3
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#define CE_RECORD(com, errnum) (++(com)->delta_error_counts[errnum])
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/* types. XXX - should be elsewhere */
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typedef u_int Port_t; /* hardware port */
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typedef u_char bool_t; /* boolean */
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/* queue of linear buffers */
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struct lbq {
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u_char *l_head; /* next char to process */
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u_char *l_tail; /* one past the last char to process */
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struct lbq *l_next; /* next in queue */
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bool_t l_queued; /* nonzero if queued */
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};
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/* com device structure */
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struct com_s {
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u_char state; /* miscellaneous flag bits */
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bool_t active_out; /* nonzero if the callout device is open */
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u_char cfcr_image; /* copy of value written to CFCR */
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#ifdef COM_ESP
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bool_t esp; /* is this unit a hayes esp board? */
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#endif
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u_char fifo_image; /* copy of value written to FIFO */
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bool_t hasfifo; /* nonzero for 16550 UARTs */
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bool_t loses_outints; /* nonzero if device loses output interrupts */
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u_char mcr_image; /* copy of value written to MCR */
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#ifdef COM_MULTIPORT
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bool_t multiport; /* is this unit part of a multiport device? */
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#endif /* COM_MULTIPORT */
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bool_t no_irq; /* nonzero if irq is not attached */
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bool_t gone; /* hardware disappeared */
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bool_t poll; /* nonzero if polling is required */
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bool_t poll_output; /* nonzero if polling for output is required */
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int unit; /* unit number */
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int dtr_wait; /* time to hold DTR down on close (* 1/hz) */
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u_int tx_fifo_size;
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u_int wopeners; /* # processes waiting for DCD in open() */
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/*
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* The high level of the driver never reads status registers directly
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* because there would be too many side effects to handle conveniently.
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* Instead, it reads copies of the registers stored here by the
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* interrupt handler.
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*/
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u_char last_modem_status; /* last MSR read by intr handler */
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u_char prev_modem_status; /* last MSR handled by high level */
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u_char hotchar; /* ldisc-specific char to be handled ASAP */
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u_char *ibuf; /* start of input buffer */
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u_char *ibufend; /* end of input buffer */
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u_char *ihighwater; /* threshold in input buffer */
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u_char *iptr; /* next free spot in input buffer */
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struct lbq obufq; /* head of queue of output buffers */
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struct lbq obufs[2]; /* output buffers */
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Port_t data_port; /* i/o ports */
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#ifdef COM_ESP
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Port_t esp_port;
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#endif
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Port_t int_id_port;
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Port_t iobase;
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Port_t modem_ctl_port;
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Port_t line_status_port;
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Port_t modem_status_port;
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struct tty *tp; /* cross reference */
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/* Initial state. */
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struct termios it_in; /* should be in struct tty */
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struct termios it_out;
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/* Lock state. */
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struct termios lt_in; /* should be in struct tty */
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struct termios lt_out;
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bool_t do_timestamp;
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struct timeval timestamp;
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u_long bytes_in; /* statistics */
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u_long bytes_out;
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u_int delta_error_counts[CE_NTYPES];
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u_long error_counts[CE_NTYPES];
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/*
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* Ping-pong input buffers. The extra factor of 2 in the sizes is
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* to allow for an error byte for each input byte.
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*/
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#define CE_INPUT_OFFSET RS_IBUFSIZE
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u_char ibuf1[2 * RS_IBUFSIZE];
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u_char ibuf2[2 * RS_IBUFSIZE];
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/*
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* Data area for output buffers. Someday we should build the output
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* buffer queue without copying data.
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*/
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u_char obuf1[256];
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u_char obuf2[256];
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#ifdef DEVFS
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void *devfs_token_ttyd;
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void *devfs_token_ttyl;
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void *devfs_token_ttyi;
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void *devfs_token_cuaa;
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void *devfs_token_cual;
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void *devfs_token_cuai;
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#endif
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};
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/*
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* XXX public functions in drivers should be declared in headers produced
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* by `config', not here.
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*/
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/* Interrupt handling entry points. */
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inthand2_t siointrts;
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void siopoll __P((void));
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/* Device switch entry points. */
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#define sioreset noreset
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#define siommap nommap
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#define siostrategy nostrategy
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#ifdef COM_ESP
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static int espattach __P((struct isa_device *isdp, struct com_s *com,
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Port_t esp_port));
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#endif
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static int sioattach __P((struct isa_device *dev));
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static timeout_t siodtrwakeup;
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static void comhardclose __P((struct com_s *com));
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static void siointr1 __P((struct com_s *com));
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static int commctl __P((struct com_s *com, int bits, int how));
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static int comparam __P((struct tty *tp, struct termios *t));
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static int sioprobe __P((struct isa_device *dev));
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static void sioregisterdev __P((struct isa_device *id));
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static void siosettimeout __P((void));
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static void comstart __P((struct tty *tp));
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static timeout_t comwakeup;
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static void disc_optim __P((struct tty *tp, struct termios *t,
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struct com_s *com));
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#ifdef DSI_SOFT_MODEM
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static int LoadSoftModem __P((int unit,int base_io, u_long size, u_char *ptr));
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#endif /* DSI_SOFT_MODEM */
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static char driver_name[] = "sio";
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/* table and macro for fast conversion from a unit number to its com struct */
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static struct com_s *p_com_addr[NSIO];
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#define com_addr(unit) (p_com_addr[unit])
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static struct timeval intr_timestamp;
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struct isa_driver siodriver = {
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sioprobe, sioattach, driver_name
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};
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static d_open_t sioopen;
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static d_close_t sioclose;
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static d_read_t sioread;
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static d_write_t siowrite;
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static d_ioctl_t sioioctl;
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static d_stop_t siostop;
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static d_devtotty_t siodevtotty;
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#define CDEV_MAJOR 28
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static struct cdevsw sio_cdevsw = {
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sioopen, sioclose, sioread, siowrite,
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sioioctl, siostop, noreset, siodevtotty,
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ttselect, nommap, NULL, driver_name,
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NULL, -1,
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};
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static int comconsole = -1;
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static speed_t comdefaultrate = TTYDEF_SPEED;
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static u_int com_events; /* input chars + weighted output completions */
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static int sio_timeout;
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static int sio_timeouts_until_log;
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#if 0 /* XXX */
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static struct tty *sio_tty[NSIO];
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#else
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static struct tty sio_tty[NSIO];
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#endif
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static const int nsio_tty = NSIO;
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#ifdef KGDB
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#include <machine/remote-sl.h>
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extern int kgdb_dev;
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extern int kgdb_rate;
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extern int kgdb_debug_init;
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#endif
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static struct speedtab comspeedtab[] = {
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{ 0, 0 },
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{ 50, COMBRD(50) },
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{ 75, COMBRD(75) },
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{ 110, COMBRD(110) },
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{ 134, COMBRD(134) },
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{ 150, COMBRD(150) },
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{ 200, COMBRD(200) },
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{ 300, COMBRD(300) },
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{ 600, COMBRD(600) },
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{ 1200, COMBRD(1200) },
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{ 1800, COMBRD(1800) },
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{ 2400, COMBRD(2400) },
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{ 4800, COMBRD(4800) },
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{ 9600, COMBRD(9600) },
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{ 19200, COMBRD(19200) },
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{ 38400, COMBRD(38400) },
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{ 57600, COMBRD(57600) },
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{ 115200, COMBRD(115200) },
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{ -1, -1 }
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};
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static struct kern_devconf kdc_sio[NSIO] = { {
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0, 0, 0, /* filled in by dev_attach */
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driver_name, 0, { MDDT_ISA, 0, "tty" },
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isa_generic_externalize, 0, 0, ISA_EXTERNALLEN,
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&kdc_isa0, /* parent */
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0, /* parentdata */
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DC_UNCONFIGURED, /* state */
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"Serial port",
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DC_CLS_SERIAL /* class */
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} };
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#ifdef COM_ESP
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/* XXX configure this properly. */
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static Port_t likely_com_ports[] = { 0x3f8, 0x2f8, 0x3e8, 0x2e8, };
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static Port_t likely_esp_ports[] = { 0x140, 0x180, 0x280, 0 };
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#endif
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#if NCRD > 0
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/*
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* PC-Card (PCMCIA) specific code.
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*/
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static int card_intr(struct pccard_dev *); /* Interrupt handler */
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static void siounload(struct pccard_dev *); /* Disable driver */
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static void siosuspend(struct pccard_dev *); /* Suspend driver */
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static int sioinit(struct pccard_dev *, int); /* init device */
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static struct pccard_drv sio_info =
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{
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driver_name,
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card_intr,
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siounload,
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siosuspend,
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sioinit,
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0, /* Attributes - presently unused */
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&tty_imask /* Interrupt mask for device */
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/* This should also include net_imask?? */
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};
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/*
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* Called when a power down is wanted. Shuts down the
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* device and configures the device as unavailable (but
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* still loaded...). A resume is done by calling
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* sioinit with first=0. This is called when the user suspends
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* the system, or the APM code suspends the system.
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*/
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static void
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siosuspend(struct pccard_dev *dp)
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{
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printf("sio%d: suspending\n", dp->isahd.id_unit);
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}
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/*
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* Initialize the device - called from Slot manager.
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* if first is set, then initially check for
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* the device's existence before initialising it.
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* Once initialised, the device table may be set up.
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*/
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int
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sioinit(struct pccard_dev *dp, int first)
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{
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/*
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* validate unit number.
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*/
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if (first)
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{
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if (dp->isahd.id_unit >= NSIO)
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return(ENODEV);
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/*
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* Make sure it isn't already probed.
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*/
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if (com_addr(dp->isahd.id_unit))
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return(EBUSY);
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/*
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* Probe the device. If a value is returned, the
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* device was found at the location.
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*/
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if (sioprobe(&dp->isahd)==0)
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return(ENXIO);
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if (sioattach(&dp->isahd)==0)
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return(ENXIO);
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}
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/*
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* XXX TODO:
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* If it was already inited before, the device structure
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* should be already initialised. Here we should
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* reset (and possibly restart) the hardware, but
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* I am not sure of the best way to do this...
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*/
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return(0);
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}
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/*
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* siounload - unload the driver and clear the table.
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* XXX TODO:
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* This is called usually when the card is ejected, but
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* can be caused by the modunload of a controller driver.
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* The idea is reset the driver's view of the device
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* and ensure that any driver entry points such as
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* read and write do not hang.
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*/
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static void
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siounload(struct pccard_dev *dp)
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|
{
|
|
struct com_s *com;
|
|
|
|
com = com_addr(dp->isahd.id_unit);
|
|
if (!com->iobase) {
|
|
printf("sio%d already unloaded!\n",dp->isahd.id_unit);
|
|
return;
|
|
}
|
|
kdc_sio[com->unit].kdc_state = DC_UNCONFIGURED;
|
|
kdc_sio[com->unit].kdc_description = "Serial port";
|
|
if (com->tp && (com->tp->t_state & TS_ISOPEN)) {
|
|
com->gone = 1;
|
|
printf("sio%d: unload\n", dp->isahd.id_unit);
|
|
com->tp->t_gen++;
|
|
ttyclose(com->tp);
|
|
ttwakeup(com->tp);
|
|
ttwwakeup(com->tp);
|
|
} else {
|
|
com_addr(com->unit) = NULL;
|
|
bzero(com, sizeof *com);
|
|
free(com,M_TTYS);
|
|
printf("sio%d: unload,gone\n", dp->isahd.id_unit);
|
|
}
|
|
}
|
|
|
|
/*
|
|
* card_intr - Shared interrupt called from
|
|
* front end of PC-Card handler.
|
|
*/
|
|
static int
|
|
card_intr(struct pccard_dev *dp)
|
|
{
|
|
struct com_s *com;
|
|
com = com_addr(dp->isahd.id_unit);
|
|
if (com && !com_addr(dp->isahd.id_unit)->gone)
|
|
siointr1(com_addr(dp->isahd.id_unit));
|
|
return(1);
|
|
}
|
|
#endif /* NCRD > 0 */
|
|
|
|
static void
|
|
sioregisterdev(id)
|
|
struct isa_device *id;
|
|
{
|
|
int unit;
|
|
|
|
unit = id->id_unit;
|
|
/*
|
|
* If already registered, don't try to re-register.
|
|
*/
|
|
if (kdc_sio[unit].kdc_isa)
|
|
return;
|
|
if (unit != 0)
|
|
kdc_sio[unit] = kdc_sio[0];
|
|
kdc_sio[unit].kdc_state = DC_UNCONFIGURED;
|
|
kdc_sio[unit].kdc_description = "Serial port";
|
|
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;
|
|
{
|
|
static bool_t already_init;
|
|
bool_t failures[10];
|
|
int fn;
|
|
struct isa_device *idev;
|
|
Port_t iobase;
|
|
u_char mcr_image;
|
|
int result;
|
|
struct isa_device *xdev;
|
|
|
|
sioregisterdev(dev);
|
|
|
|
if (!already_init) {
|
|
/*
|
|
* Turn off MCR_IENABLE for all likely serial ports. An unused
|
|
* port with its MCR_IENABLE gate open will inhibit interrupts
|
|
* from any used port that shares the interrupt vector.
|
|
* XXX the gate enable is elsewhere for some multiports.
|
|
*/
|
|
for (xdev = isa_devtab_tty; xdev->id_driver != NULL; xdev++)
|
|
if (xdev->id_driver == &siodriver && xdev->id_enabled)
|
|
outb(xdev->id_iobase + com_mcr, 0);
|
|
#if NCRD > 0
|
|
/*
|
|
* If PC-Card probe required, then register driver with
|
|
* slot manager.
|
|
*/
|
|
pccard_add_driver(&sio_info);
|
|
#endif /* NCRD > 0 */
|
|
already_init = TRUE;
|
|
}
|
|
|
|
/*
|
|
* If the device is on a multiport card and has an AST/4
|
|
* compatible interrupt control register, initialize this
|
|
* register and prepare to leave MCR_IENABLE clear in the mcr.
|
|
* Otherwise, prepare to set MCR_IENABLE in the mcr.
|
|
* Point idev to the device struct giving the correct id_irq.
|
|
* This is the struct for the master device if there is one.
|
|
*/
|
|
idev = dev;
|
|
mcr_image = MCR_IENABLE;
|
|
#ifdef COM_MULTIPORT
|
|
if (COM_ISMULTIPORT(dev)) {
|
|
idev = find_isadev(isa_devtab_tty, &siodriver,
|
|
COM_MPMASTER(dev));
|
|
if (idev == NULL) {
|
|
printf("sio%d: master device %d not configured\n",
|
|
dev->id_unit, COM_MPMASTER(dev));
|
|
return (0);
|
|
}
|
|
if (!COM_NOTAST4(dev)) {
|
|
outb(idev->id_iobase + com_scr,
|
|
idev->id_irq ? 0x80 : 0);
|
|
mcr_image = 0;
|
|
}
|
|
}
|
|
#endif /* COM_MULTIPORT */
|
|
if (idev->id_irq == 0)
|
|
mcr_image = 0;
|
|
|
|
bzero(failures, sizeof failures);
|
|
iobase = dev->id_iobase;
|
|
|
|
/*
|
|
* We don't want to get actual interrupts, just masked ones.
|
|
* Interrupts from this line should already be masked in the ICU,
|
|
* but mask them in the processor as well in case there are some
|
|
* (misconfigured) shared interrupts.
|
|
*/
|
|
disable_intr();
|
|
/* EXTRA DELAY? */
|
|
|
|
/*
|
|
* XXX DELAY() reenables CPU interrupts. This is a problem for
|
|
* shared interrupts after the first device using one has been
|
|
* successfully probed - config_isadev() has enabled the interrupt
|
|
* in the ICU.
|
|
*/
|
|
outb(IO_ICU1 + 1, 0xff);
|
|
|
|
/*
|
|
* Initialize the speed and the word size and wait long enough to
|
|
* drain the maximum of 16 bytes of junk in device output queues.
|
|
* The speed is undefined after a master reset and must be set
|
|
* before relying on anything related to output. There may be
|
|
* junk after a (very fast) soft reboot and (apparently) after
|
|
* master reset.
|
|
* XXX what about the UART bug avoided by waiting in comparam()?
|
|
* We don't want to to wait long enough to drain at 2 bps.
|
|
*/
|
|
outb(iobase + com_cfcr, CFCR_DLAB);
|
|
outb(iobase + com_dlbl, COMBRD(9600) & 0xff);
|
|
outb(iobase + com_dlbh, (u_int) COMBRD(9600) >> 8);
|
|
outb(iobase + com_cfcr, CFCR_8BITS);
|
|
DELAY((16 + 1) * 1000000 / (9600 / 10));
|
|
|
|
/*
|
|
* Enable the interrupt gate and disable device interupts. This
|
|
* should leave the device driving the interrupt line low and
|
|
* guarantee an edge trigger if an interrupt can be generated.
|
|
*/
|
|
/* EXTRA DELAY? */
|
|
outb(iobase + com_mcr, mcr_image);
|
|
outb(iobase + com_ier, 0);
|
|
|
|
/*
|
|
* Attempt to set loopback mode so that we can send a null byte
|
|
* without annoying any external device.
|
|
*/
|
|
/* EXTRA DELAY? */
|
|
outb(iobase + com_mcr, mcr_image | MCR_LOOPBACK);
|
|
|
|
/*
|
|
* Attempt to generate an output interrupt. On 8250's, setting
|
|
* IER_ETXRDY generates an interrupt independent of the current
|
|
* setting and independent of whether the THR is empty. On 16450's,
|
|
* setting IER_ETXRDY generates an interrupt independent of the
|
|
* current setting. On 16550A's, setting IER_ETXRDY only
|
|
* generates an interrupt when IER_ETXRDY is not already set.
|
|
*/
|
|
outb(iobase + com_ier, IER_ETXRDY);
|
|
|
|
/*
|
|
* On some 16x50 incompatibles, setting IER_ETXRDY doesn't generate
|
|
* an interrupt. They'd better generate one for actually doing
|
|
* output. Loopback may be broken on the same incompatibles but
|
|
* it's unlikely to do more than allow the null byte out.
|
|
*/
|
|
outb(iobase + com_data, 0);
|
|
DELAY((1 + 2) * 1000000 / (9600 / 10));
|
|
|
|
/*
|
|
* Turn off loopback mode so that the interrupt gate works again
|
|
* (MCR_IENABLE was hidden). This should leave the device driving
|
|
* an interrupt line high. It doesn't matter if the interrupt
|
|
* line oscillates while we are not looking at it, since interrupts
|
|
* are disabled.
|
|
*/
|
|
/* EXTRA DELAY? */
|
|
outb(iobase + com_mcr, mcr_image);
|
|
|
|
/*
|
|
* Check that
|
|
* o the CFCR, IER and MCR in UART hold the values written to them
|
|
* (the values happen to be all distinct - this is good for
|
|
* avoiding false positive tests from bus echoes).
|
|
* o an output interrupt is generated and its vector is correct.
|
|
* o the interrupt goes away when the IIR in the UART is read.
|
|
*/
|
|
/* EXTRA DELAY? */
|
|
failures[0] = inb(iobase + com_cfcr) - CFCR_8BITS;
|
|
failures[1] = inb(iobase + com_ier) - IER_ETXRDY;
|
|
failures[2] = inb(iobase + com_mcr) - mcr_image;
|
|
if (idev->id_irq != 0)
|
|
failures[3] = isa_irq_pending(idev) ? 0 : 1;
|
|
failures[4] = (inb(iobase + com_iir) & IIR_IMASK) - IIR_TXRDY;
|
|
if (idev->id_irq != 0)
|
|
failures[5] = isa_irq_pending(idev) ? 1 : 0;
|
|
failures[6] = (inb(iobase + com_iir) & IIR_IMASK) - IIR_NOPEND;
|
|
|
|
/*
|
|
* Turn off all device interrupts and check that they go off properly.
|
|
* Leave MCR_IENABLE alone. For ports without a master port, it gates
|
|
* the OUT2 output of the UART to
|
|
* the ICU input. Closing the gate would give a floating ICU input
|
|
* (unless there is another device driving at) and spurious interrupts.
|
|
* (On the system that this was first tested on, the input floats high
|
|
* and gives a (masked) interrupt as soon as the gate is closed.)
|
|
*/
|
|
outb(iobase + com_ier, 0);
|
|
outb(iobase + com_cfcr, CFCR_8BITS); /* dummy to avoid bus echo */
|
|
failures[7] = inb(iobase + com_ier);
|
|
if (idev->id_irq != 0)
|
|
failures[8] = isa_irq_pending(idev) ? 1 : 0;
|
|
failures[9] = (inb(iobase + com_iir) & IIR_IMASK) - IIR_NOPEND;
|
|
|
|
outb(IO_ICU1 + 1, imen); /* XXX */
|
|
enable_intr();
|
|
|
|
result = IO_COMSIZE;
|
|
for (fn = 0; fn < sizeof failures; ++fn)
|
|
if (failures[fn]) {
|
|
outb(iobase + com_mcr, 0);
|
|
result = 0;
|
|
if (COM_VERBOSE(dev))
|
|
printf("sio%d: probe test %d failed\n",
|
|
dev->id_unit, fn);
|
|
}
|
|
return (result);
|
|
}
|
|
|
|
#ifdef COM_ESP
|
|
static int
|
|
espattach(isdp, com, esp_port)
|
|
struct isa_device *isdp;
|
|
struct com_s *com;
|
|
Port_t esp_port;
|
|
{
|
|
u_char dips;
|
|
u_char val;
|
|
|
|
/*
|
|
* Check the ESP-specific I/O port to see if we're an ESP
|
|
* card. If not, return failure immediately.
|
|
*/
|
|
if ((inb(esp_port) & 0xf3) == 0) {
|
|
printf(" port 0x%x is not an ESP board?\n", esp_port);
|
|
return (0);
|
|
}
|
|
|
|
/*
|
|
* We've got something that claims to be a Hayes ESP card.
|
|
* Let's hope so.
|
|
*/
|
|
|
|
/* Get the dip-switch configuration */
|
|
outb(esp_port + ESP_CMD1, ESP_GETDIPS);
|
|
dips = inb(esp_port + ESP_STATUS1);
|
|
|
|
/*
|
|
* Bits 0,1 of dips say which COM port we are.
|
|
*/
|
|
if (com->iobase == likely_com_ports[dips & 0x03])
|
|
printf(" : ESP");
|
|
else {
|
|
printf(" esp_port has com %d\n", dips & 0x03);
|
|
return (0);
|
|
}
|
|
|
|
/*
|
|
* Check for ESP version 2.0 or later: bits 4,5,6 = 010.
|
|
*/
|
|
outb(esp_port + ESP_CMD1, ESP_GETTEST);
|
|
val = inb(esp_port + ESP_STATUS1); /* clear reg 1 */
|
|
val = inb(esp_port + ESP_STATUS2);
|
|
if ((val & 0x70) < 0x20) {
|
|
printf("-old (%o)", val & 0x70);
|
|
return (0);
|
|
}
|
|
|
|
/*
|
|
* Check for ability to emulate 16550: bit 7 == 1
|
|
*/
|
|
if ((dips & 0x80) == 0) {
|
|
printf(" slave");
|
|
return (0);
|
|
}
|
|
|
|
/*
|
|
* Okay, we seem to be a Hayes ESP card. Whee.
|
|
*/
|
|
com->esp = TRUE;
|
|
com->esp_port = esp_port;
|
|
return (1);
|
|
}
|
|
#endif /* COM_ESP */
|
|
|
|
static int
|
|
sioattach(isdp)
|
|
struct isa_device *isdp;
|
|
{
|
|
struct com_s *com;
|
|
dev_t dev;
|
|
#ifdef COM_ESP
|
|
Port_t *espp;
|
|
#endif
|
|
Port_t iobase;
|
|
int s;
|
|
int unit;
|
|
|
|
isdp->id_ri_flags |= RI_FAST;
|
|
iobase = isdp->id_iobase;
|
|
unit = isdp->id_unit;
|
|
com = malloc(sizeof *com, M_TTYS, M_NOWAIT);
|
|
if (com == NULL)
|
|
return (0);
|
|
|
|
/*
|
|
* sioprobe() has initialized the device registers as follows:
|
|
* o cfcr = CFCR_8BITS.
|
|
* It is most important that CFCR_DLAB is off, so that the
|
|
* data port is not hidden when we enable interrupts.
|
|
* o ier = 0.
|
|
* Interrupts are only enabled when the line is open.
|
|
* o mcr = MCR_IENABLE, or 0 if the port has AST/4 compatible
|
|
* interrupt control register or the config specifies no irq.
|
|
* Keeping MCR_DTR and MCR_RTS off might stop the external
|
|
* device from sending before we are ready.
|
|
*/
|
|
bzero(com, sizeof *com);
|
|
com->unit = unit;
|
|
com->cfcr_image = CFCR_8BITS;
|
|
com->dtr_wait = 3 * hz;
|
|
com->loses_outints = COM_LOSESOUTINTS(isdp) != 0;
|
|
com->no_irq = isdp->id_irq == 0;
|
|
com->tx_fifo_size = 1;
|
|
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->iobase = iobase;
|
|
com->data_port = iobase + com_data;
|
|
com->int_id_port = iobase + com_iir;
|
|
com->modem_ctl_port = iobase + com_mcr;
|
|
com->mcr_image = inb(com->modem_ctl_port);
|
|
com->line_status_port = iobase + com_lsr;
|
|
com->modem_status_port = iobase + com_msr;
|
|
|
|
/*
|
|
* 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) {
|
|
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;
|
|
|
|
/* attempt to determine UART type */
|
|
printf("sio%d: type", unit);
|
|
|
|
#ifdef DSI_SOFT_MODEM
|
|
if((inb(iobase+7) ^ inb(iobase+7)) & 0x80) {
|
|
printf(" Digicom Systems, Inc. SoftModem");
|
|
kdc_sio[unit].kdc_description =
|
|
"Serial port: Digicom Systems SoftModem";
|
|
goto determined_type;
|
|
}
|
|
#endif /* DSI_SOFT_MODEM */
|
|
|
|
#ifdef COM_MULTIPORT
|
|
if (!COM_ISMULTIPORT(isdp))
|
|
#endif
|
|
{
|
|
u_char scr;
|
|
u_char scr1;
|
|
u_char scr2;
|
|
|
|
scr = inb(iobase + com_scr);
|
|
outb(iobase + com_scr, 0xa5);
|
|
scr1 = inb(iobase + com_scr);
|
|
outb(iobase + com_scr, 0x5a);
|
|
scr2 = inb(iobase + com_scr);
|
|
outb(iobase + com_scr, scr);
|
|
if (scr1 != 0xa5 || scr2 != 0x5a) {
|
|
printf(" 8250");
|
|
kdc_sio[unit].kdc_description =
|
|
"Serial port: National 8250 or compatible";
|
|
goto determined_type;
|
|
}
|
|
}
|
|
outb(iobase + com_fifo, FIFO_ENABLE | FIFO_RX_HIGH);
|
|
DELAY(100);
|
|
switch (inb(com->int_id_port) & IIR_FIFO_MASK) {
|
|
case FIFO_RX_LOW:
|
|
printf(" 16450");
|
|
kdc_sio[unit].kdc_description =
|
|
"Serial port: National 16450 or compatible";
|
|
break;
|
|
case FIFO_RX_MEDL:
|
|
printf(" 16450?");
|
|
kdc_sio[unit].kdc_description =
|
|
"Serial port: maybe National 16450";
|
|
break;
|
|
case FIFO_RX_MEDH:
|
|
printf(" 16550?");
|
|
kdc_sio[unit].kdc_description =
|
|
"Serial port: maybe National 16550";
|
|
break;
|
|
case FIFO_RX_HIGH:
|
|
printf(" 16550A");
|
|
if (COM_NOFIFO(isdp)) {
|
|
printf(" fifo disabled");
|
|
kdc_sio[unit].kdc_description =
|
|
"Serial port: National 16550A, FIFO disabled";
|
|
} else {
|
|
com->hasfifo = TRUE;
|
|
com->tx_fifo_size = 16;
|
|
kdc_sio[unit].kdc_description =
|
|
"Serial port: National 16550A or compatible";
|
|
#ifdef COM_ESP
|
|
for (espp = likely_esp_ports; *espp != 0; espp++)
|
|
if (espattach(isdp, com, *espp)) {
|
|
com->tx_fifo_size = 1024;
|
|
kdc_sio[unit].kdc_description =
|
|
"Serial port: Hayes ESP";
|
|
break;
|
|
}
|
|
#endif
|
|
}
|
|
#if 0
|
|
/*
|
|
* Check for the Startech ST16C650 chip.
|
|
* it has a shadow register under the com_iir,
|
|
* which can only be accessed when cfcr == 0xff
|
|
*/
|
|
{
|
|
u_char i, j;
|
|
|
|
i = inb(iobase + com_iir);
|
|
outb(iobase + com_cfcr, 0xff);
|
|
outb(iobase + com_iir, 0x0);
|
|
outb(iobase + com_cfcr, CFCR_8BITS);
|
|
j = inb(iobase + com_iir);
|
|
outb(iobase + com_iir, i);
|
|
if (i != j) {
|
|
printf(" 16550A");
|
|
} else {
|
|
com->tx_fifo_size = 32;
|
|
printf(" 16650");
|
|
kdc_sio[unit].kdc_description =
|
|
"Serial port: Startech 16C650 or similar";
|
|
}
|
|
if (!com->tx_fifo_size)
|
|
printf(" fifo disabled");
|
|
}
|
|
#endif
|
|
break;
|
|
}
|
|
#ifdef COM_ESP
|
|
if (com->esp) {
|
|
outb(iobase + com_fifo,
|
|
FIFO_DMA_MODE | FIFO_ENABLE | FIFO_RCV_RST | FIFO_XMT_RST
|
|
| FIFO_RX_MEDH);
|
|
|
|
/* Set 16550 compatibility mode. */
|
|
outb(com->esp_port + ESP_CMD1, ESP_SETMODE);
|
|
outb(com->esp_port + ESP_CMD2,
|
|
ESP_MODE_SCALE | ESP_MODE_RTS | ESP_MODE_FIFO);
|
|
|
|
/* Set RTS/CTS flow control. */
|
|
outb(com->esp_port + ESP_CMD1, ESP_SETFLOWTYPE);
|
|
outb(com->esp_port + ESP_CMD2, ESP_FLOW_RTS);
|
|
outb(com->esp_port + ESP_CMD2, ESP_FLOW_CTS);
|
|
|
|
/* Set flow-control levels. */
|
|
outb(com->esp_port + ESP_CMD1, ESP_SETRXFLOW);
|
|
outb(com->esp_port + ESP_CMD2, HIBYTE(768));
|
|
outb(com->esp_port + ESP_CMD2, LOBYTE(768));
|
|
outb(com->esp_port + ESP_CMD2, HIBYTE(512));
|
|
outb(com->esp_port + ESP_CMD2, LOBYTE(512));
|
|
}
|
|
#endif /* COM_ESP */
|
|
outb(iobase + com_fifo, 0);
|
|
determined_type: ;
|
|
|
|
#ifdef COM_MULTIPORT
|
|
if (COM_ISMULTIPORT(isdp)) {
|
|
com->multiport = TRUE;
|
|
printf(" (multiport");
|
|
if (unit == COM_MPMASTER(isdp))
|
|
printf(" master");
|
|
printf(")");
|
|
com->no_irq = find_isadev(isa_devtab_tty, &siodriver,
|
|
COM_MPMASTER(isdp))->id_irq == 0;
|
|
}
|
|
#endif /* COM_MULTIPORT */
|
|
printf("\n");
|
|
|
|
kdc_sio[unit].kdc_state = (unit == comconsole) ? DC_BUSY : DC_IDLE;
|
|
|
|
#ifdef KGDB
|
|
if (kgdb_dev == makedev(CDEV_MAJOR, unit)) {
|
|
if (unit == comconsole)
|
|
kgdb_dev = -1; /* can't debug over console port */
|
|
else {
|
|
int divisor;
|
|
|
|
/*
|
|
* XXX now unfinished and broken. Need to do
|
|
* something more like a full open(). There's no
|
|
* suitable interrupt handler so don't enable device
|
|
* interrupts. Watch out for null tp's.
|
|
*/
|
|
outb(iobase + com_cfcr, CFCR_DLAB);
|
|
divisor = ttspeedtab(kgdb_rate, comspeedtab);
|
|
outb(iobase + com_dlbl, divisor & 0xFF);
|
|
outb(iobase + com_dlbh, (u_int) divisor >> 8);
|
|
outb(iobase + com_cfcr, CFCR_8BITS);
|
|
outb(com->modem_ctl_port,
|
|
com->mcr_image |= MCR_DTR | MCR_RTS);
|
|
|
|
if (kgdb_debug_init) {
|
|
/*
|
|
* Print prefix of device name,
|
|
* let kgdb_connect print the rest.
|
|
*/
|
|
printf("sio%d: ", unit);
|
|
kgdb_connect(1);
|
|
} else
|
|
printf("sio%d: kgdb enabled\n", unit);
|
|
}
|
|
}
|
|
#endif
|
|
|
|
s = spltty();
|
|
com_addr(unit) = com;
|
|
splx(s);
|
|
|
|
dev = makedev(CDEV_MAJOR, 0);
|
|
cdevsw_add(&dev, &sio_cdevsw, NULL);
|
|
#ifdef DEVFS
|
|
/* devsw, minor, type, uid, gid, perm, fmt, ... */
|
|
com->devfs_token_ttyd = devfs_add_devswf(&sio_cdevsw,
|
|
unit, DV_CHR, 0, 0, 0600, "ttyd%n", unit);
|
|
com->devfs_token_ttyi = devfs_add_devswf(&sio_cdevsw,
|
|
unit | CONTROL_INIT_STATE, DV_CHR, 0, 0, 0600, "ttyid%n", unit);
|
|
com->devfs_token_ttyl = devfs_add_devswf(&sio_cdevsw,
|
|
unit | CONTROL_LOCK_STATE, DV_CHR, 0, 0, 0600, "ttyld%n", unit);
|
|
com->devfs_token_cuaa = devfs_add_devswf(&sio_cdevsw,
|
|
unit | CALLOUT_MASK, DV_CHR, 0, 0, 0660, "cuaa%n", unit);
|
|
com->devfs_token_cuai = devfs_add_devswf(&sio_cdevsw,
|
|
unit | CALLOUT_MASK | CONTROL_INIT_STATE, DV_CHR, 0, 0, 0660,
|
|
"cuaia%n", unit);
|
|
com->devfs_token_cual = devfs_add_devswf(&sio_cdevsw,
|
|
unit | CALLOUT_MASK | CONTROL_LOCK_STATE, DV_CHR, 0, 0, 0660,
|
|
"cuala%n", unit);
|
|
#endif
|
|
return (1);
|
|
}
|
|
|
|
static int
|
|
sioopen(dev, flag, mode, p)
|
|
dev_t dev;
|
|
int flag;
|
|
int mode;
|
|
struct proc *p;
|
|
{
|
|
struct com_s *com;
|
|
int error;
|
|
Port_t 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 (com->gone)
|
|
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, "siodtr", 0);
|
|
if (com_addr(unit) == NULL)
|
|
return (ENXIO);
|
|
if (error != 0 || com->gone)
|
|
goto out;
|
|
}
|
|
kdc_sio[unit].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, "siobi", 0);
|
|
if (com_addr(unit) == NULL)
|
|
return (ENXIO);
|
|
if (error != 0 || com->gone)
|
|
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;
|
|
(void)commctl(com, TIOCM_DTR | TIOCM_RTS, DMSET);
|
|
com->poll = com->no_irq;
|
|
com->poll_output = com->loses_outints;
|
|
++com->wopeners;
|
|
error = comparam(tp, &tp->t_termios);
|
|
--com->wopeners;
|
|
if (error != 0)
|
|
goto out;
|
|
/*
|
|
* XXX we should goto open_top if comparam() slept.
|
|
*/
|
|
ttsetwater(tp);
|
|
iobase = com->iobase;
|
|
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
|
|
| com->fifo_image);
|
|
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();
|
|
/*
|
|
* 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 "siobi"
|
|
* instead of "siodcd".
|
|
*/
|
|
/*
|
|
* 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, "siodcd", 0);
|
|
if (com_addr(unit) == NULL)
|
|
return (ENXIO);
|
|
--com->wopeners;
|
|
if (error != 0 || com->gone)
|
|
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);
|
|
}
|
|
|
|
static 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);
|
|
if (com->gone) {
|
|
printf("sio%d: gone\n", com->unit);
|
|
s = spltty();
|
|
com_addr(com->unit) = 0;
|
|
bzero(tp,sizeof *tp);
|
|
bzero(com,sizeof *com);
|
|
free(com,M_TTYS);
|
|
splx(s);
|
|
}
|
|
return (0);
|
|
}
|
|
|
|
static void
|
|
comhardclose(com)
|
|
struct com_s *com;
|
|
{
|
|
Port_t iobase;
|
|
int s;
|
|
struct tty *tp;
|
|
int unit;
|
|
|
|
unit = com->unit;
|
|
iobase = com->iobase;
|
|
s = spltty();
|
|
com->poll = FALSE;
|
|
com->poll_output = FALSE;
|
|
com->do_timestamp = 0;
|
|
outb(iobase + com_cfcr, com->cfcr_image &= ~CFCR_SBREAK);
|
|
#ifdef KGDB
|
|
/* do not disable interrupts or hang up if debugging */
|
|
if (kgdb_dev != makedev(CDEV_MAJOR, unit))
|
|
#endif
|
|
{
|
|
outb(iobase + com_ier, 0);
|
|
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);
|
|
if (com->dtr_wait != 0) {
|
|
timeout(siodtrwakeup, com, com->dtr_wait);
|
|
com->state |= CS_DTR_OFF;
|
|
}
|
|
}
|
|
}
|
|
if (com->hasfifo) {
|
|
/*
|
|
* Disable fifos so that they are off after controlled
|
|
* reboots. Some BIOSes fail to detect 16550s when the
|
|
* fifos are enabled.
|
|
*/
|
|
outb(iobase + com_fifo, 0);
|
|
}
|
|
com->active_out = FALSE;
|
|
wakeup(&com->active_out);
|
|
wakeup(TSA_CARR_ON(tp)); /* restart any wopeners */
|
|
if (!(com->state & CS_DTR_OFF) && unit != comconsole)
|
|
kdc_sio[unit].kdc_state = DC_IDLE;
|
|
splx(s);
|
|
}
|
|
|
|
static int
|
|
sioread(dev, uio, flag)
|
|
dev_t dev;
|
|
struct uio *uio;
|
|
int flag;
|
|
{
|
|
int mynor;
|
|
int unit;
|
|
struct tty *tp;
|
|
|
|
mynor = minor(dev);
|
|
if (mynor & CONTROL_MASK)
|
|
return (ENODEV);
|
|
unit = MINOR_TO_UNIT(mynor);
|
|
if (com_addr(unit)->gone)
|
|
return (ENODEV);
|
|
tp = com_addr(unit)->tp;
|
|
return ((*linesw[tp->t_line].l_read)(tp, uio, flag));
|
|
}
|
|
|
|
static 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);
|
|
if (com_addr(unit)->gone)
|
|
return (ENODEV);
|
|
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 != NULL && unit == comconsole)
|
|
constty = NULL;
|
|
return ((*linesw[tp->t_line].l_write)(tp, uio, flag));
|
|
}
|
|
|
|
static void
|
|
siodtrwakeup(chan)
|
|
void *chan;
|
|
{
|
|
struct com_s *com;
|
|
|
|
com = (struct com_s *)chan;
|
|
com->state &= ~CS_DTR_OFF;
|
|
if (com->unit != comconsole)
|
|
kdc_sio[com->unit].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;
|
|
{
|
|
#ifndef COM_MULTIPORT
|
|
siointr1(com_addr(unit));
|
|
#else /* COM_MULTIPORT */
|
|
struct com_s *com;
|
|
bool_t possibly_more_intrs;
|
|
|
|
/*
|
|
* Loop until there is no activity on any port. This is necessary
|
|
* to get an interrupt edge more than to avoid another interrupt.
|
|
* If the IRQ signal is just an OR of the IRQ signals from several
|
|
* devices, then the edge from one may be lost because another is
|
|
* on.
|
|
*/
|
|
do {
|
|
possibly_more_intrs = FALSE;
|
|
for (unit = 0; unit < NSIO; ++unit) {
|
|
com = com_addr(unit);
|
|
if (com != NULL
|
|
&& !com->gone
|
|
&& (inb(com->int_id_port) & IIR_IMASK)
|
|
!= IIR_NOPEND) {
|
|
siointr1(com);
|
|
possibly_more_intrs = TRUE;
|
|
}
|
|
}
|
|
} while (possibly_more_intrs);
|
|
#endif /* COM_MULTIPORT */
|
|
}
|
|
|
|
static void
|
|
siointr1(com)
|
|
struct com_s *com;
|
|
{
|
|
u_char line_status;
|
|
u_char modem_status;
|
|
u_char *ioptr;
|
|
u_char recv_data;
|
|
|
|
if (com->do_timestamp)
|
|
/* XXX a little bloat here... */
|
|
com->timestamp = intr_timestamp;
|
|
while (TRUE) {
|
|
line_status = inb(com->line_status_port);
|
|
|
|
/* input event? (check first to help avoid overruns) */
|
|
while (line_status & LSR_RCV_MASK) {
|
|
/* break/unnattached error bits or real input? */
|
|
if (!(line_status & LSR_RXRDY))
|
|
recv_data = 0;
|
|
else
|
|
recv_data = inb(com->data_port);
|
|
if (line_status & (LSR_PE|LSR_FE|LSR_BI)) {
|
|
#ifdef DDB
|
|
#ifdef BREAK_TO_DEBUGGER
|
|
if (line_status & LSR_BI
|
|
&& com->unit == comconsole) {
|
|
Debugger("serial console break");
|
|
goto cont;
|
|
}
|
|
#endif
|
|
#endif
|
|
/*
|
|
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;
|
|
}
|
|
++com->bytes_in;
|
|
if (com->hotchar != 0 && recv_data == com->hotchar)
|
|
setsofttty();
|
|
#ifdef KGDB
|
|
/* trap into kgdb? (XXX - needs testing and optim) */
|
|
if (recv_data == FRAME_END
|
|
&& ( com->tp == NULL
|
|
|| !(com->tp->t_state & TS_ISOPEN))
|
|
&& kgdb_dev == makedev(CDEV_MAJOR, unit)) {
|
|
kgdb_connect(0);
|
|
continue;
|
|
}
|
|
#endif /* KGDB */
|
|
ioptr = com->iptr;
|
|
if (ioptr >= com->ibufend)
|
|
CE_RECORD(com, CE_INTERRUPT_BUF_OVERFLOW);
|
|
else {
|
|
++com_events;
|
|
schedsofttty();
|
|
#if 0 /* for testing input latency vs efficiency */
|
|
if (com->iptr - com->ibuf == 8)
|
|
setsofttty();
|
|
#endif
|
|
ioptr[0] = recv_data;
|
|
ioptr[CE_INPUT_OFFSET] = line_status;
|
|
com->iptr = ++ioptr;
|
|
if (ioptr == com->ihighwater
|
|
&& com->state & CS_RTS_IFLOW)
|
|
outb(com->modem_ctl_port,
|
|
com->mcr_image &= ~MCR_RTS);
|
|
if (line_status & LSR_OE)
|
|
CE_RECORD(com, CE_OVERRUN);
|
|
}
|
|
cont:
|
|
/*
|
|
* "& 0x7F" is to avoid the gcc-1.40 generating a slow
|
|
* jump from the top of the loop to here
|
|
*/
|
|
line_status = inb(com->line_status_port) & 0x7F;
|
|
}
|
|
|
|
/* modem status change? (always check before doing output) */
|
|
modem_status = inb(com->modem_status_port);
|
|
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();
|
|
}
|
|
|
|
/* handle CTS change immediately for crisp flow ctl */
|
|
if (com->state & CS_CTS_OFLOW) {
|
|
if (modem_status & MSR_CTS)
|
|
com->state |= CS_ODEVREADY;
|
|
else
|
|
com->state &= ~CS_ODEVREADY;
|
|
}
|
|
}
|
|
|
|
/* output queued and everything ready? */
|
|
if (line_status & LSR_TXRDY
|
|
&& com->state >= (CS_BUSY | CS_TTGO | CS_ODEVREADY)) {
|
|
ioptr = com->obufq.l_head;
|
|
if (com->tx_fifo_size > 1) {
|
|
u_int ocount;
|
|
|
|
ocount = com->obufq.l_tail - ioptr;
|
|
if (ocount > com->tx_fifo_size)
|
|
ocount = com->tx_fifo_size;
|
|
com->bytes_out += ocount;
|
|
do
|
|
outb(com->data_port, *ioptr++);
|
|
while (--ocount != 0);
|
|
} else {
|
|
outb(com->data_port, *ioptr++);
|
|
++com->bytes_out;
|
|
}
|
|
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;
|
|
}
|
|
if (!(com->state & CS_ODONE)) {
|
|
com_events += LOTS_OF_EVENTS;
|
|
com->state |= CS_ODONE;
|
|
setsofttty(); /* handle at high level ASAP */
|
|
}
|
|
}
|
|
}
|
|
|
|
/* finished? */
|
|
#ifndef COM_MULTIPORT
|
|
if ((inb(com->int_id_port) & IIR_IMASK) == IIR_NOPEND)
|
|
#endif /* COM_MULTIPORT */
|
|
return;
|
|
}
|
|
}
|
|
|
|
static 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;
|
|
Port_t 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));
|
|
if (com->gone)
|
|
return (ENODEV);
|
|
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);
|
|
#ifdef DSI_SOFT_MODEM
|
|
/*
|
|
* Download micro-code to Digicom modem.
|
|
*/
|
|
case TIOCDSIMICROCODE:
|
|
{
|
|
u_long l;
|
|
u_char *p,*pi;
|
|
|
|
pi = (u_char*)(*(caddr_t*)data);
|
|
error = copyin(pi,&l,sizeof l);
|
|
if(error)
|
|
{return error;};
|
|
pi += sizeof l;
|
|
|
|
p = malloc(l,M_TEMP,M_NOWAIT);
|
|
if(!p)
|
|
{return ENOBUFS;}
|
|
error = copyin(pi,p,l);
|
|
if(error)
|
|
{free(p,M_TEMP); return error;};
|
|
if(error = LoadSoftModem(
|
|
MINOR_TO_UNIT(mynor),iobase,l,p))
|
|
{free(p,M_TEMP); return error;}
|
|
free(p,M_TEMP);
|
|
return(0);
|
|
}
|
|
#endif /* DSI_SOFT_MODEM */
|
|
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);
|
|
}
|
|
switch (cmd) {
|
|
case TIOCSBRK:
|
|
outb(iobase + com_cfcr, com->cfcr_image |= CFCR_SBREAK);
|
|
break;
|
|
case TIOCCBRK:
|
|
outb(iobase + com_cfcr, com->cfcr_image &= ~CFCR_SBREAK);
|
|
break;
|
|
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;
|
|
|
|
if (com_events == 0)
|
|
return;
|
|
repeat:
|
|
for (unit = 0; unit < NSIO; ++unit) {
|
|
u_char *buf;
|
|
struct com_s *com;
|
|
u_char *ibuf;
|
|
int incc;
|
|
struct tty *tp;
|
|
|
|
com = com_addr(unit);
|
|
if (com == NULL)
|
|
continue;
|
|
if (com->gone)
|
|
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))
|
|
outb(com->modem_ctl_port,
|
|
com->mcr_image |= MCR_RTS);
|
|
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;
|
|
{
|
|
u_int cfcr;
|
|
int cflag;
|
|
struct com_s *com;
|
|
int divisor;
|
|
int error;
|
|
Port_t iobase;
|
|
int s;
|
|
int unit;
|
|
int txtimeout;
|
|
|
|
/* do historical conversions */
|
|
if (t->c_ispeed == 0)
|
|
t->c_ispeed = t->c_ospeed;
|
|
|
|
/* check requested parameters */
|
|
divisor = ttspeedtab(t->c_ospeed, comspeedtab);
|
|
if (divisor < 0 || divisor > 0 && t->c_ispeed != t->c_ospeed)
|
|
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();
|
|
if (divisor == 0)
|
|
(void)commctl(com, TIOCM_DTR, DMBIC); /* hang up line */
|
|
else
|
|
(void)commctl(com, TIOCM_DTR, DMBIS);
|
|
cflag = t->c_cflag;
|
|
switch (cflag & CSIZE) {
|
|
case CS5:
|
|
cfcr = CFCR_5BITS;
|
|
break;
|
|
case CS6:
|
|
cfcr = CFCR_6BITS;
|
|
break;
|
|
case CS7:
|
|
cfcr = CFCR_7BITS;
|
|
break;
|
|
default:
|
|
cfcr = CFCR_8BITS;
|
|
break;
|
|
}
|
|
if (cflag & PARENB) {
|
|
cfcr |= CFCR_PENAB;
|
|
if (!(cflag & PARODD))
|
|
cfcr |= CFCR_PEVEN;
|
|
}
|
|
if (cflag & CSTOPB)
|
|
cfcr |= CFCR_STOPB;
|
|
|
|
if (com->hasfifo) {
|
|
/*
|
|
* Use a fifo trigger level low enough so that the input
|
|
* latency from the fifo is less than about 16 msec and
|
|
* the total latency is less than about 30 msec. These
|
|
* latencies are reasonable for humans. Serial comms
|
|
* protocols shouldn't expect anything better since modem
|
|
* latencies are larger.
|
|
*/
|
|
com->fifo_image = t->c_ospeed != 0 && t->c_ospeed <= 4800
|
|
? FIFO_ENABLE : FIFO_ENABLE | FIFO_RX_HIGH;
|
|
outb(iobase + com_fifo, com->fifo_image);
|
|
}
|
|
|
|
/*
|
|
* Some UARTs lock up if the divisor latch registers are selected
|
|
* while the UART is doing output (they refuse to transmit anything
|
|
* more until given a hard reset). Fix this by stopping filling
|
|
* the device buffers and waiting for them to drain. Reading the
|
|
* line status port outside of siointr1() might lose some receiver
|
|
* error bits, but that is acceptable here.
|
|
*/
|
|
disable_intr();
|
|
retry:
|
|
com->state &= ~CS_TTGO;
|
|
txtimeout = tp->t_timeout;
|
|
enable_intr();
|
|
while ((inb(com->line_status_port) & (LSR_TSRE | LSR_TXRDY))
|
|
!= (LSR_TSRE | LSR_TXRDY)) {
|
|
tp->t_state |= TS_SO_OCOMPLETE;
|
|
error = ttysleep(tp, TSA_OCOMPLETE(tp), TTIPRI | PCATCH,
|
|
"siotx", hz / 100);
|
|
if ( txtimeout != 0
|
|
&& (!error || error == EAGAIN)
|
|
&& (txtimeout -= hz / 100) <= 0
|
|
)
|
|
error = EIO;
|
|
if (com->gone)
|
|
error = ENODEV;
|
|
if (error != 0 && error != EAGAIN) {
|
|
if (!(tp->t_state & TS_TTSTOP)) {
|
|
disable_intr();
|
|
com->state |= CS_TTGO;
|
|
enable_intr();
|
|
}
|
|
splx(s);
|
|
return (error);
|
|
}
|
|
}
|
|
|
|
disable_intr(); /* very important while com_data is hidden */
|
|
|
|
/*
|
|
* XXX - clearing CS_TTGO is not sufficient to stop further output,
|
|
* because siopoll() calls comstart() which usually sets it again
|
|
* because TS_TTSTOP is clear. Setting TS_TTSTOP would not be
|
|
* sufficient, for similar reasons.
|
|
*/
|
|
if ((inb(com->line_status_port) & (LSR_TSRE | LSR_TXRDY))
|
|
!= (LSR_TSRE | LSR_TXRDY))
|
|
goto retry;
|
|
|
|
if (divisor != 0) {
|
|
outb(iobase + com_cfcr, cfcr | CFCR_DLAB);
|
|
outb(iobase + com_dlbl, divisor & 0xFF);
|
|
outb(iobase + com_dlbh, (u_int) divisor >> 8);
|
|
}
|
|
outb(iobase + com_cfcr, com->cfcr_image = cfcr);
|
|
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;
|
|
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;
|
|
}
|
|
/* XXX shouldn't call functions while intrs are disabled. */
|
|
disc_optim(tp, t, com);
|
|
/*
|
|
* 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);
|
|
|
|
enable_intr();
|
|
splx(s);
|
|
return (0);
|
|
}
|
|
|
|
static void
|
|
comstart(tp)
|
|
struct tty *tp;
|
|
{
|
|
struct com_s *com;
|
|
int s;
|
|
int unit;
|
|
|
|
unit = DEV_TO_UNIT(tp->t_dev);
|
|
com = com_addr(unit);
|
|
s = spltty();
|
|
disable_intr();
|
|
if (tp->t_state & TS_TTSTOP)
|
|
com->state &= ~CS_TTGO;
|
|
else
|
|
com->state |= CS_TTGO;
|
|
if (tp->t_state & TS_TBLOCK) {
|
|
if (com->mcr_image & MCR_RTS && com->state & CS_RTS_IFLOW)
|
|
outb(com->modem_ctl_port, com->mcr_image &= ~MCR_RTS);
|
|
} 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)
|
|
outb(com->modem_ctl_port, com->mcr_image |= MCR_RTS);
|
|
}
|
|
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) {
|
|
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;
|
|
}
|
|
enable_intr();
|
|
}
|
|
if (tp->t_outq.c_cc != 0 && !com->obufs[1].l_queued) {
|
|
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;
|
|
}
|
|
enable_intr();
|
|
}
|
|
tp->t_state |= TS_BUSY;
|
|
}
|
|
disable_intr();
|
|
if (com->state >= (CS_BUSY | CS_TTGO))
|
|
siointr1(com); /* fake interrupt to start output */
|
|
enable_intr();
|
|
ttwwakeup(tp);
|
|
splx(s);
|
|
}
|
|
|
|
static void
|
|
siostop(tp, rw)
|
|
struct tty *tp;
|
|
int rw;
|
|
{
|
|
struct com_s *com;
|
|
|
|
com = com_addr(DEV_TO_UNIT(tp->t_dev));
|
|
if (com->gone)
|
|
return;
|
|
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. */
|
|
}
|
|
|
|
static 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;
|
|
{
|
|
int mcr;
|
|
int msr;
|
|
|
|
if (how == DMGET) {
|
|
bits = TIOCM_LE; /* XXX - always enabled while open */
|
|
mcr = com->mcr_image;
|
|
if (mcr & MCR_DTR)
|
|
bits |= TIOCM_DTR;
|
|
if (mcr & MCR_RTS)
|
|
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;
|
|
/*
|
|
* XXX - MSR_RI is naturally volatile, and we make MSR_TERI
|
|
* more volatile by reading the modem status a lot. Perhaps
|
|
* we should latch both bits until the status is read here.
|
|
*/
|
|
if (msr & (MSR_RI | MSR_TERI))
|
|
bits |= TIOCM_RI;
|
|
return (bits);
|
|
}
|
|
mcr = 0;
|
|
if (bits & TIOCM_DTR)
|
|
mcr |= MCR_DTR;
|
|
if (bits & TIOCM_RTS)
|
|
mcr |= MCR_RTS;
|
|
if (com->gone)
|
|
return(0);
|
|
disable_intr();
|
|
switch (how) {
|
|
case DMSET:
|
|
outb(com->modem_ctl_port,
|
|
com->mcr_image = mcr | (com->mcr_image & MCR_IENABLE));
|
|
break;
|
|
case DMBIS:
|
|
outb(com->modem_ctl_port, com->mcr_image |= mcr);
|
|
break;
|
|
case DMBIC:
|
|
outb(com->modem_ctl_port, com->mcr_image &= ~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 && !com->gone) {
|
|
someopen = TRUE;
|
|
if (com->poll || com->poll_output) {
|
|
sio_timeout = hz > 200 ? hz / 200 : 1;
|
|
break;
|
|
}
|
|
}
|
|
}
|
|
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);
|
|
|
|
/*
|
|
* 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->gone
|
|
&& (com->state >= (CS_BUSY | CS_TTGO) || com->poll)) {
|
|
disable_intr();
|
|
siointr1(com);
|
|
enable_intr();
|
|
}
|
|
}
|
|
|
|
/*
|
|
* 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;
|
|
if (com->gone)
|
|
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, "sio%d: %u more %s%s (total %lu)\n",
|
|
unit, delta, error_desc[errnum],
|
|
delta == 1 ? "" : "s", total);
|
|
}
|
|
}
|
|
}
|
|
|
|
static void
|
|
disc_optim(tp, t, com)
|
|
struct tty *tp;
|
|
struct termios *t;
|
|
struct com_s *com;
|
|
{
|
|
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;
|
|
}
|
|
|
|
/*
|
|
* Following are all routines needed for SIO to act as console
|
|
*/
|
|
#include <machine/cons.h>
|
|
|
|
struct siocnstate {
|
|
u_char dlbl;
|
|
u_char dlbh;
|
|
u_char ier;
|
|
u_char cfcr;
|
|
u_char mcr;
|
|
};
|
|
|
|
static Port_t siocniobase;
|
|
|
|
static void siocnclose __P((struct siocnstate *sp));
|
|
static void siocnopen __P((struct siocnstate *sp));
|
|
static void siocntxwait __P((void));
|
|
|
|
static void
|
|
siocntxwait()
|
|
{
|
|
int timo;
|
|
|
|
/*
|
|
* Wait for any pending transmission to finish. Required to avoid
|
|
* the UART lockup bug when the speed is changed, and for normal
|
|
* transmits.
|
|
*/
|
|
timo = 100000;
|
|
while ((inb(siocniobase + com_lsr) & (LSR_TSRE | LSR_TXRDY))
|
|
!= (LSR_TSRE | LSR_TXRDY) && --timo != 0)
|
|
;
|
|
}
|
|
|
|
static void
|
|
siocnopen(sp)
|
|
struct siocnstate *sp;
|
|
{
|
|
int divisor;
|
|
Port_t iobase;
|
|
|
|
/*
|
|
* Save all the device control registers except the fifo register
|
|
* and set our default ones (cs8 -parenb speed=comdefaultrate).
|
|
* We can't save the fifo register since it is read-only.
|
|
*/
|
|
iobase = siocniobase;
|
|
sp->ier = inb(iobase + com_ier);
|
|
outb(iobase + com_ier, 0); /* spltty() doesn't stop siointr() */
|
|
siocntxwait();
|
|
sp->cfcr = inb(iobase + com_cfcr);
|
|
outb(iobase + com_cfcr, CFCR_DLAB);
|
|
sp->dlbl = inb(iobase + com_dlbl);
|
|
sp->dlbh = inb(iobase + com_dlbh);
|
|
divisor = ttspeedtab(comdefaultrate, comspeedtab);
|
|
outb(iobase + com_dlbl, divisor & 0xFF);
|
|
outb(iobase + com_dlbh, (u_int) divisor >> 8);
|
|
outb(iobase + com_cfcr, CFCR_8BITS);
|
|
sp->mcr = inb(iobase + com_mcr);
|
|
/*
|
|
* We don't want interrupts, but must be careful not to "disable"
|
|
* them by clearing the MCR_IENABLE bit, since that might cause
|
|
* an interrupt by floating the IRQ line.
|
|
*/
|
|
outb(iobase + com_mcr, (sp->mcr & MCR_IENABLE) | MCR_DTR | MCR_RTS);
|
|
}
|
|
|
|
static void
|
|
siocnclose(sp)
|
|
struct siocnstate *sp;
|
|
{
|
|
Port_t iobase;
|
|
|
|
/*
|
|
* Restore the device control registers.
|
|
*/
|
|
siocntxwait();
|
|
iobase = siocniobase;
|
|
outb(iobase + com_cfcr, CFCR_DLAB);
|
|
outb(iobase + com_dlbl, sp->dlbl);
|
|
outb(iobase + com_dlbh, sp->dlbh);
|
|
outb(iobase + com_cfcr, sp->cfcr);
|
|
/*
|
|
* XXX damp oscillations of MCR_DTR and MCR_RTS by not restoring them.
|
|
*/
|
|
outb(iobase + com_mcr, sp->mcr | MCR_DTR | MCR_RTS);
|
|
outb(iobase + com_ier, sp->ier);
|
|
}
|
|
|
|
void
|
|
siocnprobe(cp)
|
|
struct consdev *cp;
|
|
{
|
|
int unit;
|
|
|
|
/* XXX: ick */
|
|
unit = DEV_TO_UNIT(CONUNIT);
|
|
siocniobase = CONADDR;
|
|
|
|
/* make sure hardware exists? XXX */
|
|
|
|
/* initialize required fields */
|
|
cp->cn_dev = makedev(CDEV_MAJOR, unit);
|
|
#ifdef COMCONSOLE
|
|
cp->cn_pri = CN_REMOTE; /* Force a serial port console */
|
|
#else
|
|
cp->cn_pri = (boothowto & RB_SERIAL) ? CN_REMOTE : CN_NORMAL;
|
|
#endif
|
|
}
|
|
|
|
void
|
|
siocninit(cp)
|
|
struct consdev *cp;
|
|
{
|
|
comconsole = DEV_TO_UNIT(cp->cn_dev);
|
|
}
|
|
|
|
int
|
|
siocncheckc(dev)
|
|
dev_t dev;
|
|
{
|
|
int c;
|
|
Port_t iobase;
|
|
int s;
|
|
struct siocnstate sp;
|
|
|
|
iobase = siocniobase;
|
|
s = spltty();
|
|
siocnopen(&sp);
|
|
if (inb(iobase + com_lsr) & LSR_RXRDY)
|
|
c = inb(iobase + com_data);
|
|
else
|
|
c = 0;
|
|
siocnclose(&sp);
|
|
splx(s);
|
|
return (c);
|
|
}
|
|
|
|
|
|
int
|
|
siocngetc(dev)
|
|
dev_t dev;
|
|
{
|
|
int c;
|
|
Port_t iobase;
|
|
int s;
|
|
struct siocnstate sp;
|
|
|
|
iobase = siocniobase;
|
|
s = spltty();
|
|
siocnopen(&sp);
|
|
while (!(inb(iobase + com_lsr) & LSR_RXRDY))
|
|
;
|
|
c = inb(iobase + com_data);
|
|
siocnclose(&sp);
|
|
splx(s);
|
|
return (c);
|
|
}
|
|
|
|
void
|
|
siocnputc(dev, c)
|
|
dev_t dev;
|
|
int c;
|
|
{
|
|
int s;
|
|
struct siocnstate sp;
|
|
|
|
s = spltty();
|
|
siocnopen(&sp);
|
|
siocntxwait();
|
|
outb(siocniobase + com_data, c);
|
|
siocnclose(&sp);
|
|
splx(s);
|
|
}
|
|
|
|
#ifdef DSI_SOFT_MODEM
|
|
/*
|
|
* The magic code to download microcode to a "Connection 14.4+Fax"
|
|
* modem from Digicom Systems Inc. Very magic.
|
|
*/
|
|
|
|
#define DSI_ERROR(str) { ptr = str; goto error; }
|
|
static int
|
|
LoadSoftModem(int unit, int base_io, u_long size, u_char *ptr)
|
|
{
|
|
int int_c,int_k;
|
|
int data_0188, data_0187;
|
|
|
|
/*
|
|
* First see if it is a DSI SoftModem
|
|
*/
|
|
if(!((inb(base_io+7) ^ inb(base_io+7) & 0x80)))
|
|
return ENODEV;
|
|
|
|
data_0188 = inb(base_io+4);
|
|
data_0187 = inb(base_io+3);
|
|
outb(base_io+3,0x80);
|
|
outb(base_io+4,0x0C);
|
|
outb(base_io+0,0x31);
|
|
outb(base_io+1,0x8C);
|
|
outb(base_io+7,0x10);
|
|
outb(base_io+7,0x19);
|
|
|
|
if(0x18 != (inb(base_io+7) & 0x1A))
|
|
DSI_ERROR("dsp bus not granted");
|
|
|
|
if(0x01 != (inb(base_io+7) & 0x01)) {
|
|
outb(base_io+7,0x18);
|
|
outb(base_io+7,0x19);
|
|
if(0x01 != (inb(base_io+7) & 0x01))
|
|
DSI_ERROR("program mem not granted");
|
|
}
|
|
|
|
int_c = 0;
|
|
|
|
while(1) {
|
|
if(int_c >= 7 || size <= 0x1800)
|
|
break;
|
|
|
|
for(int_k = 0 ; int_k < 0x800; int_k++) {
|
|
outb(base_io+0,*ptr++);
|
|
outb(base_io+1,*ptr++);
|
|
outb(base_io+2,*ptr++);
|
|
}
|
|
|
|
size -= 0x1800;
|
|
int_c++;
|
|
}
|
|
|
|
if(size > 0x1800) {
|
|
outb(base_io+7,0x18);
|
|
outb(base_io+7,0x19);
|
|
if(0x00 != (inb(base_io+7) & 0x01))
|
|
DSI_ERROR("program data not granted");
|
|
|
|
for(int_k = 0 ; int_k < 0x800; int_k++) {
|
|
outb(base_io+1,*ptr++);
|
|
outb(base_io+2,0);
|
|
outb(base_io+1,*ptr++);
|
|
outb(base_io+2,*ptr++);
|
|
}
|
|
|
|
size -= 0x1800;
|
|
|
|
while(size > 0x1800) {
|
|
for(int_k = 0 ; int_k < 0xC00; int_k++) {
|
|
outb(base_io+1,*ptr++);
|
|
outb(base_io+2,*ptr++);
|
|
}
|
|
size -= 0x1800;
|
|
}
|
|
|
|
if(size < 0x1800) {
|
|
for(int_k=0;int_k<size/2;int_k++) {
|
|
outb(base_io+1,*ptr++);
|
|
outb(base_io+2,*ptr++);
|
|
}
|
|
}
|
|
|
|
} else if (size > 0) {
|
|
if(int_c == 7) {
|
|
outb(base_io+7,0x18);
|
|
outb(base_io+7,0x19);
|
|
if(0x00 != (inb(base_io+7) & 0x01))
|
|
DSI_ERROR("program data not granted");
|
|
for(int_k = 0 ; int_k < size/3; int_k++) {
|
|
outb(base_io+1,*ptr++);
|
|
outb(base_io+2,0);
|
|
outb(base_io+1,*ptr++);
|
|
outb(base_io+2,*ptr++);
|
|
}
|
|
} else {
|
|
for(int_k = 0 ; int_k < size/3; int_k++) {
|
|
outb(base_io+0,*ptr++);
|
|
outb(base_io+1,*ptr++);
|
|
outb(base_io+2,*ptr++);
|
|
}
|
|
}
|
|
}
|
|
outb(base_io+7,0x11);
|
|
outb(base_io+7,3);
|
|
|
|
outb(base_io+4,data_0188 & 0xfb);
|
|
|
|
outb(base_io+3,data_0187);
|
|
|
|
return 0;
|
|
error:
|
|
printf("sio%d: DSI SoftModem microcode load failed: <%s>\n",unit,ptr);
|
|
outb(base_io+7,0x00); \
|
|
outb(base_io+3,data_0187); \
|
|
outb(base_io+4,data_0188); \
|
|
return EIO;
|
|
}
|
|
#endif /* DSI_SOFT_MODEM */
|