1038 lines
26 KiB
C
1038 lines
26 KiB
C
/*-
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* Copyright (c) 1996 Kazutaka YOKOTA (yokota@zodiac.mech.utsunomiya-u.ac.jp)
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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. The name of the author may not be used to endorse or promote
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* products derived from this software without specific prior written
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* permission.
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*
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* THIS SOFTWARE IS PROVIDED BY THE AUTHOR 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 AUTHOR 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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* $Id: kbdio.c,v 1.12 1998/02/13 07:09:38 bde Exp $
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*/
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#include "sc.h"
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#include "vt.h"
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#include "psm.h"
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#include "opt_kbdio.h"
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#include <sys/param.h>
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#include <sys/systm.h>
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#include <sys/syslog.h>
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#include <machine/clock.h>
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#include <i386/isa/kbdio.h>
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/*
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* driver specific options: the following options may be set by
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* `options' statements in the kernel configuration file.
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*/
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/* retry count */
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#ifndef KBD_MAXRETRY
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#define KBD_MAXRETRY 3
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#endif
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/* timing parameters */
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#ifndef KBD_RESETDELAY
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#define KBD_RESETDELAY 200 /* wait 200msec after kbd/mouse reset */
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#endif
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#ifndef KBD_MAXWAIT
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#define KBD_MAXWAIT 5 /* wait 5 times at most after reset */
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#endif
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/* I/O recovery time */
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#ifdef PC98
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#define KBDC_DELAYTIME 37
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#define KBDD_DELAYTIME 37
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#else
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#define KBDC_DELAYTIME 20
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#define KBDD_DELAYTIME 7
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#endif
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/* debug option */
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#ifndef KBDIO_DEBUG
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#define KBDIO_DEBUG 0
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#endif
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/* end of driver specific options */
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/* constants */
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#define NKBDC MAX(MAX(NSC, NVT), NPSM)
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#define KBDQ_BUFSIZE 32
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/* macros */
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#ifndef MAX
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#define MAX(x, y) ((x) > (y) ? (x) : (y))
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#endif
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#define kbdcp(p) ((struct kbdc_softc *)(p))
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#define nextq(i) (((i) + 1) % KBDQ_BUFSIZE)
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#define availq(q) ((q)->head != (q)->tail)
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#if KBDIO_DEBUG >= 2
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#define emptyq(q) ((q)->tail = (q)->head = (q)->qcount = 0)
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#else
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#define emptyq(q) ((q)->tail = (q)->head = 0)
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#endif
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/* local variables */
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typedef struct _kqueue {
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int head;
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int tail;
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unsigned char q[KBDQ_BUFSIZE];
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#if KBDIO_DEBUG >= 2
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int call_count;
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int qcount;
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int max_qcount;
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#endif
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} kqueue;
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struct kbdc_softc {
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int port; /* base port address */
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int command_byte; /* current command byte value */
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int command_mask; /* command byte mask bits for kbd/aux devices */
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int lock; /* FIXME: XXX not quite a semaphore... */
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kqueue kbd; /* keyboard data queue */
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kqueue aux; /* auxiliary data queue */
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};
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static struct kbdc_softc kbdc_softc[NKBDC] = { { 0 }, };
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static int verbose = KBDIO_DEBUG;
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/* function prototypes */
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#ifndef PC98
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static int addq(kqueue *q, int c);
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static int removeq(kqueue *q);
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static int wait_while_controller_busy(struct kbdc_softc *kbdc);
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static int wait_for_data(struct kbdc_softc *kbdc);
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#endif
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static int wait_for_kbd_data(struct kbdc_softc *kbdc);
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#ifndef PC98
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static int wait_for_kbd_ack(struct kbdc_softc *kbdc);
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static int wait_for_aux_data(struct kbdc_softc *kbdc);
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static int wait_for_aux_ack(struct kbdc_softc *kbdc);
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#endif
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/* associate a port number with a KBDC */
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KBDC
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kbdc_open(int port)
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{
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#ifdef PC98
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if (NKBDC) {
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/* PC-98 has only one keyboard I/F */
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kbdc_softc[0].port = port;
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kbdc_softc[0].lock = FALSE;
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return (KBDC)&kbdc_softc[0];
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}
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return NULL; /* You didn't include sc driver in your config file */
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#else
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int s;
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int i;
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s = spltty();
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for (i = 0; i < NKBDC; ++i) {
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if (kbdc_softc[i].port == port) {
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splx(s);
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return (KBDC) &kbdc_softc[i];
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}
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if (kbdc_softc[i].port <= 0) {
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kbdc_softc[i].port = port;
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kbdc_softc[i].command_byte = -1;
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kbdc_softc[i].command_mask = 0;
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kbdc_softc[i].lock = FALSE;
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kbdc_softc[i].kbd.head = kbdc_softc[i].kbd.tail = 0;
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kbdc_softc[i].aux.head = kbdc_softc[i].aux.tail = 0;
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#if KBDIO_DEBUG >= 2
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kbdc_softc[i].kbd.call_count = 0;
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kbdc_softc[i].kbd.qcount = kbdc_softc[i].kbd.max_qcount = 0;
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kbdc_softc[i].aux.call_count = 0;
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kbdc_softc[i].aux.qcount = kbdc_softc[i].aux.max_qcount = 0;
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#endif
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splx(s);
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return (KBDC) &kbdc_softc[i];
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}
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}
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splx(s);
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return NULL;
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#endif
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}
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/*
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* I/O access arbitration in `kbdio'
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*
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* The `kbdio' module uses a simplistic convention to arbitrate
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* I/O access to the controller/keyboard/mouse. The convention requires
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* close cooperation of the calling device driver.
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*
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* The device driver which utilizes the `kbdio' module are assumed to
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* have the following set of routines.
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* a. An interrupt handler (the bottom half of the driver).
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* b. Timeout routines which may briefly polls the keyboard controller.
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* c. Routines outside interrupt context (the top half of the driver).
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* They should follow the rules below:
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* 1. The interrupt handler may assume that it always has full access
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* to the controller/keyboard/mouse.
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* 2. The other routines must issue `spltty()' if they wish to
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* prevent the interrupt handler from accessing
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* the controller/keyboard/mouse.
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* 3. The timeout routines and the top half routines of the device driver
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* arbitrate I/O access by observing the lock flag in `kbdio'.
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* The flag is manipulated via `kbdc_lock()'; when one wants to
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* perform I/O, call `kbdc_lock(kbdc, TRUE)' and proceed only if
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* the call returns with TRUE. Otherwise the caller must back off.
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* Call `kbdc_lock(kbdc, FALSE)' when necessary I/O operaion
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* is finished. This mechanism does not prevent the interrupt
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* handler from being invoked at any time and carrying out I/O.
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* Therefore, `spltty()' must be strategically placed in the device
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* driver code. Also note that the timeout routine may interrupt
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* `kbdc_lock()' called by the top half of the driver, but this
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* interruption is OK so long as the timeout routine observes the
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* the rule 4 below.
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* 4. The interrupt and timeout routines should not extend I/O operation
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* across more than one interrupt or timeout; they must complete
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* necessary I/O operation within one invokation of the routine.
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* This measns that if the timeout routine acquires the lock flag,
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* it must reset the flag to FALSE before it returns.
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*/
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/* set/reset polling lock */
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int
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kbdc_lock(KBDC p, int lock)
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{
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int prevlock;
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prevlock = kbdcp(p)->lock;
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kbdcp(p)->lock = lock;
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return (prevlock != lock);
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}
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/* check if any data is waiting to be processed */
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int
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kbdc_data_ready(KBDC p)
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{
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#ifdef PC98
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return (inb(kbdcp(p)->port + KBD_STATUS_PORT) & KBDS_ANY_BUFFER_FULL);
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#else
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return (availq(&kbdcp(p)->kbd) || availq(&kbdcp(p)->aux)
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|| (inb(kbdcp(p)->port + KBD_STATUS_PORT) & KBDS_ANY_BUFFER_FULL));
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#endif
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}
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#ifndef PC98
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/* queuing functions */
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static int
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addq(kqueue *q, int c)
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{
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if (nextq(q->tail) != q->head) {
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q->q[q->tail] = c;
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q->tail = nextq(q->tail);
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#if KBDIO_DEBUG >= 2
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++q->call_count;
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++q->qcount;
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if (q->qcount > q->max_qcount)
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q->max_qcount = q->qcount;
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#endif
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return TRUE;
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}
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return FALSE;
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}
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static int
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removeq(kqueue *q)
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{
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int c;
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if (q->tail != q->head) {
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c = q->q[q->head];
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q->head = nextq(q->head);
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#if KBDIO_DEBUG >= 2
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--q->qcount;
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#endif
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return c;
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}
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return -1;
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}
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/*
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* device I/O routines
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*/
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static int
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wait_while_controller_busy(struct kbdc_softc *kbdc)
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{
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/* CPU will stay inside the loop for 100msec at most */
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int retry = 5000;
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int port = kbdc->port;
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int f;
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while ((f = inb(port + KBD_STATUS_PORT)) & KBDS_INPUT_BUFFER_FULL) {
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if ((f & KBDS_BUFFER_FULL) == KBDS_KBD_BUFFER_FULL) {
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DELAY(KBDD_DELAYTIME);
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addq(&kbdc->kbd, inb(port + KBD_DATA_PORT));
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} else if ((f & KBDS_BUFFER_FULL) == KBDS_AUX_BUFFER_FULL) {
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DELAY(KBDD_DELAYTIME);
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addq(&kbdc->aux, inb(port + KBD_DATA_PORT));
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}
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DELAY(KBDC_DELAYTIME);
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if (--retry < 0)
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return FALSE;
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}
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return TRUE;
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}
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/*
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* wait for any data; whether it's from the controller,
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* the keyboard, or the aux device.
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*/
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static int
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wait_for_data(struct kbdc_softc *kbdc)
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{
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/* CPU will stay inside the loop for 200msec at most */
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int retry = 10000;
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int port = kbdc->port;
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int f;
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while ((f = inb(port + KBD_STATUS_PORT) & KBDS_ANY_BUFFER_FULL) == 0) {
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DELAY(KBDC_DELAYTIME);
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if (--retry < 0)
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return 0;
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}
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DELAY(KBDD_DELAYTIME);
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return f;
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}
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#endif /* !PC98 */
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/* wait for data from the keyboard */
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static int
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wait_for_kbd_data(struct kbdc_softc *kbdc)
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{
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/* CPU will stay inside the loop for 200msec at most */
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int retry = 10000;
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int port = kbdc->port;
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int f;
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while ((f = inb(port + KBD_STATUS_PORT) & KBDS_BUFFER_FULL)
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!= KBDS_KBD_BUFFER_FULL) {
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#ifdef PC98
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DELAY(KBDD_DELAYTIME);
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#else
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if (f == KBDS_AUX_BUFFER_FULL) {
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DELAY(KBDD_DELAYTIME);
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addq(&kbdc->aux, inb(port + KBD_DATA_PORT));
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}
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#endif
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DELAY(KBDC_DELAYTIME);
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if (--retry < 0)
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return 0;
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}
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DELAY(KBDD_DELAYTIME);
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return f;
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}
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#ifndef PC98
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/*
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* wait for an ACK(FAh), RESEND(FEh), or RESET_FAIL(FCh) from the keyboard.
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* queue anything else.
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*/
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static int
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wait_for_kbd_ack(struct kbdc_softc *kbdc)
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{
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/* CPU will stay inside the loop for 200msec at most */
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int retry = 10000;
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int port = kbdc->port;
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int f;
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int b;
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while (retry-- > 0) {
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if ((f = inb(port + KBD_STATUS_PORT)) & KBDS_ANY_BUFFER_FULL) {
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DELAY(KBDD_DELAYTIME);
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b = inb(port + KBD_DATA_PORT);
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if ((f & KBDS_BUFFER_FULL) == KBDS_KBD_BUFFER_FULL) {
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if ((b == KBD_ACK) || (b == KBD_RESEND)
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|| (b == KBD_RESET_FAIL))
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return b;
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addq(&kbdc->kbd, b);
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} else if ((f & KBDS_BUFFER_FULL) == KBDS_AUX_BUFFER_FULL) {
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addq(&kbdc->aux, b);
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}
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}
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DELAY(KBDC_DELAYTIME);
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}
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return -1;
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}
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/* wait for data from the aux device */
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static int
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wait_for_aux_data(struct kbdc_softc *kbdc)
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{
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/* CPU will stay inside the loop for 200msec at most */
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int retry = 10000;
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int port = kbdc->port;
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int f;
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while ((f = inb(port + KBD_STATUS_PORT) & KBDS_BUFFER_FULL)
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!= KBDS_AUX_BUFFER_FULL) {
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if (f == KBDS_KBD_BUFFER_FULL) {
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DELAY(KBDD_DELAYTIME);
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addq(&kbdc->kbd, inb(port + KBD_DATA_PORT));
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}
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DELAY(KBDC_DELAYTIME);
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if (--retry < 0)
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return 0;
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}
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DELAY(KBDD_DELAYTIME);
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return f;
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}
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/*
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* wait for an ACK(FAh), RESEND(FEh), or RESET_FAIL(FCh) from the aux device.
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* queue anything else.
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*/
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static int
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wait_for_aux_ack(struct kbdc_softc *kbdc)
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{
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/* CPU will stay inside the loop for 200msec at most */
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int retry = 10000;
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int port = kbdc->port;
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int f;
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int b;
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while (retry-- > 0) {
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if ((f = inb(port + KBD_STATUS_PORT)) & KBDS_ANY_BUFFER_FULL) {
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DELAY(KBDD_DELAYTIME);
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b = inb(port + KBD_DATA_PORT);
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if ((f & KBDS_BUFFER_FULL) == KBDS_AUX_BUFFER_FULL) {
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if ((b == PSM_ACK) || (b == PSM_RESEND)
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|| (b == PSM_RESET_FAIL))
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return b;
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addq(&kbdc->aux, b);
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} else if ((f & KBDS_BUFFER_FULL) == KBDS_KBD_BUFFER_FULL) {
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addq(&kbdc->kbd, b);
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}
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}
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DELAY(KBDC_DELAYTIME);
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}
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return -1;
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}
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/* write a one byte command to the controller */
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int
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write_controller_command(KBDC p, int c)
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{
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if (!wait_while_controller_busy(kbdcp(p)))
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return FALSE;
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outb(kbdcp(p)->port + KBD_COMMAND_PORT, c);
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return TRUE;
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}
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/* write a one byte data to the controller */
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int
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write_controller_data(KBDC p, int c)
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{
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if (!wait_while_controller_busy(kbdcp(p)))
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return FALSE;
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outb(kbdcp(p)->port + KBD_DATA_PORT, c);
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return TRUE;
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}
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/* write a one byte keyboard command */
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int
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write_kbd_command(KBDC p, int c)
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{
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if (!wait_while_controller_busy(kbdcp(p)))
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return FALSE;
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outb(kbdcp(p)->port + KBD_DATA_PORT, c);
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return TRUE;
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}
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/* write a one byte auxiliary device command */
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int
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write_aux_command(KBDC p, int c)
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{
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if (!write_controller_command(p, KBDC_WRITE_TO_AUX))
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return FALSE;
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return write_controller_data(p, c);
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}
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/* send a command to the keyboard and wait for ACK */
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int
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send_kbd_command(KBDC p, int c)
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{
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int retry = KBD_MAXRETRY;
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int res = -1;
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while (retry-- > 0) {
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if (!write_kbd_command(p, c))
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continue;
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res = wait_for_kbd_ack(kbdcp(p));
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if (res == KBD_ACK)
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break;
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}
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return res;
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}
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/* send a command to the auxiliary device and wait for ACK */
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int
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send_aux_command(KBDC p, int c)
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{
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int retry = KBD_MAXRETRY;
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int res = -1;
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while (retry-- > 0) {
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if (!write_aux_command(p, c))
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continue;
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/*
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* FIXME: XXX
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* The aux device may have already sent one or two bytes of
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* status data, when a command is received. It will immediately
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* stop data transmission, thus, leaving an incomplete data
|
|
* packet in our buffer. We have to discard any unprocessed
|
|
* data in order to remove such packets. Well, we may remove
|
|
* unprocessed, but necessary data byte as well...
|
|
*/
|
|
emptyq(&kbdcp(p)->aux);
|
|
res = wait_for_aux_ack(kbdcp(p));
|
|
if (res == PSM_ACK)
|
|
break;
|
|
}
|
|
return res;
|
|
}
|
|
|
|
/* send a command and a data to the keyboard, wait for ACKs */
|
|
int
|
|
send_kbd_command_and_data(KBDC p, int c, int d)
|
|
{
|
|
int retry;
|
|
int res = -1;
|
|
|
|
for (retry = KBD_MAXRETRY; retry > 0; --retry) {
|
|
if (!write_kbd_command(p, c))
|
|
continue;
|
|
res = wait_for_kbd_ack(kbdcp(p));
|
|
if (res == KBD_ACK)
|
|
break;
|
|
else if (res != KBD_RESEND)
|
|
return res;
|
|
}
|
|
if (retry <= 0)
|
|
return res;
|
|
|
|
for (retry = KBD_MAXRETRY, res = -1; retry > 0; --retry) {
|
|
if (!write_kbd_command(p, d))
|
|
continue;
|
|
res = wait_for_kbd_ack(kbdcp(p));
|
|
if (res != KBD_RESEND)
|
|
break;
|
|
}
|
|
return res;
|
|
}
|
|
|
|
/* send a command and a data to the auxiliary device, wait for ACKs */
|
|
int
|
|
send_aux_command_and_data(KBDC p, int c, int d)
|
|
{
|
|
int retry;
|
|
int res = -1;
|
|
|
|
for (retry = KBD_MAXRETRY; retry > 0; --retry) {
|
|
if (!write_aux_command(p, c))
|
|
continue;
|
|
emptyq(&kbdcp(p)->aux);
|
|
res = wait_for_aux_ack(kbdcp(p));
|
|
if (res == PSM_ACK)
|
|
break;
|
|
else if (res != PSM_RESEND)
|
|
return res;
|
|
}
|
|
if (retry <= 0)
|
|
return res;
|
|
|
|
for (retry = KBD_MAXRETRY, res = -1; retry > 0; --retry) {
|
|
if (!write_aux_command(p, d))
|
|
continue;
|
|
res = wait_for_aux_ack(kbdcp(p));
|
|
if (res != PSM_RESEND)
|
|
break;
|
|
}
|
|
return res;
|
|
}
|
|
|
|
/*
|
|
* read one byte from any source; whether from the controller,
|
|
* the keyboard, or the aux device
|
|
*/
|
|
int
|
|
read_controller_data(KBDC p)
|
|
{
|
|
if (availq(&kbdcp(p)->kbd))
|
|
return removeq(&kbdcp(p)->kbd);
|
|
if (availq(&kbdcp(p)->aux))
|
|
return removeq(&kbdcp(p)->aux);
|
|
if (!wait_for_data(kbdcp(p)))
|
|
return -1; /* timeout */
|
|
return inb(kbdcp(p)->port + KBD_DATA_PORT);
|
|
}
|
|
#endif /* !PC98 */
|
|
|
|
#if KBDIO_DEBUG >= 2
|
|
static int call = 0;
|
|
#endif
|
|
|
|
/* read one byte from the keyboard */
|
|
int
|
|
read_kbd_data(KBDC p)
|
|
{
|
|
#ifndef PC98
|
|
#if KBDIO_DEBUG >= 2
|
|
if (++call > 2000) {
|
|
call = 0;
|
|
log(LOG_DEBUG, "KBDIO: kbd q: %d calls, max %d chars, "
|
|
"aux q: %d calls, max %d chars\n",
|
|
kbdcp(p)->kbd.call_count, kbdcp(p)->kbd.max_qcount,
|
|
kbdcp(p)->aux.call_count, kbdcp(p)->aux.max_qcount);
|
|
}
|
|
#endif
|
|
|
|
if (availq(&kbdcp(p)->kbd))
|
|
return removeq(&kbdcp(p)->kbd);
|
|
#endif /* !PC98 */
|
|
if (!wait_for_kbd_data(kbdcp(p)))
|
|
return -1; /* timeout */
|
|
#ifdef PC98
|
|
DELAY(KBDC_DELAYTIME);
|
|
#endif
|
|
return inb(kbdcp(p)->port + KBD_DATA_PORT);
|
|
}
|
|
|
|
/* read one byte from the keyboard, but return immediately if
|
|
* no data is waiting
|
|
*/
|
|
int
|
|
read_kbd_data_no_wait(KBDC p)
|
|
{
|
|
int f;
|
|
|
|
#ifdef PC98
|
|
f = inb(kbdcp(p)->port + KBD_STATUS_PORT) & KBDS_BUFFER_FULL;
|
|
#else
|
|
#if KBDIO_DEBUG >= 2
|
|
if (++call > 2000) {
|
|
call = 0;
|
|
log(LOG_DEBUG, "KBDIO: kbd q: %d calls, max %d chars, "
|
|
"aux q: %d calls, max %d chars\n",
|
|
kbdcp(p)->kbd.call_count, kbdcp(p)->kbd.max_qcount,
|
|
kbdcp(p)->aux.call_count, kbdcp(p)->aux.max_qcount);
|
|
}
|
|
#endif
|
|
|
|
if (availq(&kbdcp(p)->kbd))
|
|
return removeq(&kbdcp(p)->kbd);
|
|
f = inb(kbdcp(p)->port + KBD_STATUS_PORT) & KBDS_BUFFER_FULL;
|
|
if (f == KBDS_AUX_BUFFER_FULL) {
|
|
DELAY(KBDD_DELAYTIME);
|
|
addq(&kbdcp(p)->aux, inb(kbdcp(p)->port + KBD_DATA_PORT));
|
|
f = inb(kbdcp(p)->port + KBD_STATUS_PORT) & KBDS_BUFFER_FULL;
|
|
}
|
|
#endif /* PC98 */
|
|
if (f == KBDS_KBD_BUFFER_FULL) {
|
|
DELAY(KBDD_DELAYTIME);
|
|
return inb(kbdcp(p)->port + KBD_DATA_PORT);
|
|
}
|
|
return -1; /* no data */
|
|
}
|
|
|
|
#ifndef PC98
|
|
/* read one byte from the aux device */
|
|
int
|
|
read_aux_data(KBDC p)
|
|
{
|
|
if (availq(&kbdcp(p)->aux))
|
|
return removeq(&kbdcp(p)->aux);
|
|
if (!wait_for_aux_data(kbdcp(p)))
|
|
return -1; /* timeout */
|
|
return inb(kbdcp(p)->port + KBD_DATA_PORT);
|
|
}
|
|
|
|
/* read one byte from the aux device, but return immediately if
|
|
* no data is waiting
|
|
*/
|
|
int
|
|
read_aux_data_no_wait(KBDC p)
|
|
{
|
|
int f;
|
|
|
|
if (availq(&kbdcp(p)->aux))
|
|
return removeq(&kbdcp(p)->aux);
|
|
f = inb(kbdcp(p)->port + KBD_STATUS_PORT) & KBDS_BUFFER_FULL;
|
|
if (f == KBDS_KBD_BUFFER_FULL) {
|
|
DELAY(KBDD_DELAYTIME);
|
|
addq(&kbdcp(p)->kbd, inb(kbdcp(p)->port + KBD_DATA_PORT));
|
|
f = inb(kbdcp(p)->port + KBD_STATUS_PORT) & KBDS_BUFFER_FULL;
|
|
}
|
|
if (f == KBDS_AUX_BUFFER_FULL) {
|
|
DELAY(KBDD_DELAYTIME);
|
|
return inb(kbdcp(p)->port + KBD_DATA_PORT);
|
|
}
|
|
return -1; /* no data */
|
|
}
|
|
|
|
/* discard data from the keyboard */
|
|
void
|
|
empty_kbd_buffer(KBDC p, int wait)
|
|
{
|
|
int t;
|
|
int b;
|
|
int f;
|
|
#if KBDIO_DEBUG >= 2
|
|
int c1 = 0;
|
|
int c2 = 0;
|
|
#endif
|
|
int delta = 2;
|
|
|
|
for (t = wait; t > 0; ) {
|
|
if ((f = inb(kbdcp(p)->port + KBD_STATUS_PORT)) & KBDS_ANY_BUFFER_FULL) {
|
|
DELAY(KBDD_DELAYTIME);
|
|
b = inb(kbdcp(p)->port + KBD_DATA_PORT);
|
|
if ((f & KBDS_BUFFER_FULL) == KBDS_AUX_BUFFER_FULL) {
|
|
addq(&kbdcp(p)->aux, b);
|
|
#if KBDIO_DEBUG >= 2
|
|
++c2;
|
|
} else {
|
|
++c1;
|
|
#endif
|
|
}
|
|
t = wait;
|
|
} else {
|
|
t -= delta;
|
|
}
|
|
DELAY(delta*1000);
|
|
}
|
|
#if KBDIO_DEBUG >= 2
|
|
if ((c1 > 0) || (c2 > 0))
|
|
log(LOG_DEBUG, "kbdio: %d:%d char read (empty_kbd_buffer)\n", c1, c2);
|
|
#endif
|
|
|
|
emptyq(&kbdcp(p)->kbd);
|
|
}
|
|
|
|
/* discard data from the aux device */
|
|
void
|
|
empty_aux_buffer(KBDC p, int wait)
|
|
{
|
|
int t;
|
|
int b;
|
|
int f;
|
|
#if KBDIO_DEBUG >= 2
|
|
int c1 = 0;
|
|
int c2 = 0;
|
|
#endif
|
|
int delta = 2;
|
|
|
|
for (t = wait; t > 0; ) {
|
|
if ((f = inb(kbdcp(p)->port + KBD_STATUS_PORT)) & KBDS_ANY_BUFFER_FULL) {
|
|
DELAY(KBDD_DELAYTIME);
|
|
b = inb(kbdcp(p)->port + KBD_DATA_PORT);
|
|
if ((f & KBDS_BUFFER_FULL) == KBDS_KBD_BUFFER_FULL) {
|
|
addq(&kbdcp(p)->kbd, b);
|
|
#if KBDIO_DEBUG >= 2
|
|
++c1;
|
|
} else {
|
|
++c2;
|
|
#endif
|
|
}
|
|
t = wait;
|
|
} else {
|
|
t -= delta;
|
|
}
|
|
DELAY(delta*1000);
|
|
}
|
|
#if KBDIO_DEBUG >= 2
|
|
if ((c1 > 0) || (c2 > 0))
|
|
log(LOG_DEBUG, "kbdio: %d:%d char read (empty_aux_buffer)\n", c1, c2);
|
|
#endif
|
|
|
|
emptyq(&kbdcp(p)->aux);
|
|
}
|
|
|
|
/* discard any data from the keyboard or the aux device */
|
|
void
|
|
empty_both_buffers(KBDC p, int wait)
|
|
{
|
|
int t;
|
|
int f;
|
|
#if KBDIO_DEBUG >= 2
|
|
int c1 = 0;
|
|
int c2 = 0;
|
|
#endif
|
|
int delta = 2;
|
|
|
|
for (t = wait; t > 0; ) {
|
|
if ((f = inb(kbdcp(p)->port + KBD_STATUS_PORT)) & KBDS_ANY_BUFFER_FULL) {
|
|
DELAY(KBDD_DELAYTIME);
|
|
(void)inb(kbdcp(p)->port + KBD_DATA_PORT);
|
|
#if KBDIO_DEBUG >= 2
|
|
if ((f & KBDS_BUFFER_FULL) == KBDS_KBD_BUFFER_FULL)
|
|
++c1;
|
|
else
|
|
++c2;
|
|
#endif
|
|
t = wait;
|
|
} else {
|
|
t -= delta;
|
|
}
|
|
DELAY(delta*1000);
|
|
}
|
|
#if KBDIO_DEBUG >= 2
|
|
if ((c1 > 0) || (c2 > 0))
|
|
log(LOG_DEBUG, "kbdio: %d:%d char read (empty_both_buffers)\n", c1, c2);
|
|
#endif
|
|
|
|
emptyq(&kbdcp(p)->kbd);
|
|
emptyq(&kbdcp(p)->aux);
|
|
}
|
|
|
|
/* keyboard and mouse device control */
|
|
|
|
/* NOTE: enable the keyboard port but disable the keyboard
|
|
* interrupt before calling "reset_kbd()".
|
|
*/
|
|
int
|
|
reset_kbd(KBDC p)
|
|
{
|
|
int retry = KBD_MAXRETRY;
|
|
int again = KBD_MAXWAIT;
|
|
int c = KBD_RESEND; /* keep the compiler happy */
|
|
|
|
while (retry-- > 0) {
|
|
empty_both_buffers(p, 10);
|
|
if (!write_kbd_command(p, KBDC_RESET_KBD))
|
|
continue;
|
|
emptyq(&kbdcp(p)->kbd);
|
|
c = read_controller_data(p);
|
|
if (verbose || bootverbose)
|
|
log(LOG_DEBUG, "kbdio: RESET_KBD return code:%04x\n", c);
|
|
if (c == KBD_ACK) /* keyboard has agreed to reset itself... */
|
|
break;
|
|
}
|
|
if (retry < 0)
|
|
return FALSE;
|
|
|
|
while (again-- > 0) {
|
|
/* wait awhile, well, in fact we must wait quite loooooooooooong */
|
|
DELAY(KBD_RESETDELAY*1000);
|
|
c = read_controller_data(p); /* RESET_DONE/RESET_FAIL */
|
|
if (c != -1) /* wait again if the controller is not ready */
|
|
break;
|
|
}
|
|
if (verbose || bootverbose)
|
|
log(LOG_DEBUG, "kbdio: RESET_KBD status:%04x\n", c);
|
|
if (c != KBD_RESET_DONE)
|
|
return FALSE;
|
|
return TRUE;
|
|
}
|
|
|
|
/* NOTE: enable the aux port but disable the aux interrupt
|
|
* before calling `reset_aux_dev()'.
|
|
*/
|
|
int
|
|
reset_aux_dev(KBDC p)
|
|
{
|
|
int retry = KBD_MAXRETRY;
|
|
int again = KBD_MAXWAIT;
|
|
int c = PSM_RESEND; /* keep the compiler happy */
|
|
|
|
while (retry-- > 0) {
|
|
empty_both_buffers(p, 10);
|
|
if (!write_aux_command(p, PSMC_RESET_DEV))
|
|
continue;
|
|
emptyq(&kbdcp(p)->aux);
|
|
/* NOTE: Compaq Armada laptops require extra delay here. XXX */
|
|
for (again = KBD_MAXWAIT; again > 0; --again) {
|
|
DELAY(KBD_RESETDELAY*1000);
|
|
c = read_aux_data_no_wait(p);
|
|
if (c != -1)
|
|
break;
|
|
}
|
|
if (verbose || bootverbose)
|
|
log(LOG_DEBUG, "kbdio: RESET_AUX return code:%04x\n", c);
|
|
if (c == PSM_ACK) /* aux dev is about to reset... */
|
|
break;
|
|
}
|
|
if (retry < 0)
|
|
return FALSE;
|
|
|
|
for (again = KBD_MAXWAIT; again > 0; --again) {
|
|
/* wait awhile, well, quite looooooooooooong */
|
|
DELAY(KBD_RESETDELAY*1000);
|
|
c = read_aux_data_no_wait(p); /* RESET_DONE/RESET_FAIL */
|
|
if (c != -1) /* wait again if the controller is not ready */
|
|
break;
|
|
}
|
|
if (verbose || bootverbose)
|
|
log(LOG_DEBUG, "kbdio: RESET_AUX status:%04x\n", c);
|
|
if (c != PSM_RESET_DONE) /* reset status */
|
|
return FALSE;
|
|
|
|
c = read_aux_data(p); /* device ID */
|
|
if (verbose || bootverbose)
|
|
log(LOG_DEBUG, "kbdio: RESET_AUX ID:%04x\n", c);
|
|
/* NOTE: we could check the device ID now, but leave it later... */
|
|
return TRUE;
|
|
}
|
|
|
|
/* controller diagnostics and setup */
|
|
|
|
int
|
|
test_controller(KBDC p)
|
|
{
|
|
int retry = KBD_MAXRETRY;
|
|
int again = KBD_MAXWAIT;
|
|
int c = KBD_DIAG_FAIL;
|
|
|
|
while (retry-- > 0) {
|
|
empty_both_buffers(p, 10);
|
|
if (write_controller_command(p, KBDC_DIAGNOSE))
|
|
break;
|
|
}
|
|
if (retry < 0)
|
|
return FALSE;
|
|
|
|
emptyq(&kbdcp(p)->kbd);
|
|
while (again-- > 0) {
|
|
/* wait awhile */
|
|
DELAY(KBD_RESETDELAY*1000);
|
|
c = read_controller_data(p); /* DIAG_DONE/DIAG_FAIL */
|
|
if (c != -1) /* wait again if the controller is not ready */
|
|
break;
|
|
}
|
|
if (verbose || bootverbose)
|
|
log(LOG_DEBUG, "kbdio: DIAGNOSE status:%04x\n", c);
|
|
return (c == KBD_DIAG_DONE);
|
|
}
|
|
|
|
int
|
|
test_kbd_port(KBDC p)
|
|
{
|
|
int retry = KBD_MAXRETRY;
|
|
int again = KBD_MAXWAIT;
|
|
int c = -1;
|
|
|
|
while (retry-- > 0) {
|
|
empty_both_buffers(p, 10);
|
|
if (write_controller_command(p, KBDC_TEST_KBD_PORT))
|
|
break;
|
|
}
|
|
if (retry < 0)
|
|
return FALSE;
|
|
|
|
emptyq(&kbdcp(p)->kbd);
|
|
while (again-- > 0) {
|
|
c = read_controller_data(p);
|
|
if (c != -1) /* try again if the controller is not ready */
|
|
break;
|
|
}
|
|
if (verbose || bootverbose)
|
|
log(LOG_DEBUG, "kbdio: TEST_KBD_PORT status:%04x\n", c);
|
|
return c;
|
|
}
|
|
|
|
int
|
|
test_aux_port(KBDC p)
|
|
{
|
|
int retry = KBD_MAXRETRY;
|
|
int again = KBD_MAXWAIT;
|
|
int c = -1;
|
|
|
|
while (retry-- > 0) {
|
|
empty_both_buffers(p, 10);
|
|
if (write_controller_command(p, KBDC_TEST_AUX_PORT))
|
|
break;
|
|
}
|
|
if (retry < 0)
|
|
return FALSE;
|
|
|
|
emptyq(&kbdcp(p)->kbd);
|
|
while (again-- > 0) {
|
|
c = read_controller_data(p);
|
|
if (c != -1) /* try again if the controller is not ready */
|
|
break;
|
|
}
|
|
if (verbose || bootverbose)
|
|
log(LOG_DEBUG, "kbdio: TEST_AUX_PORT status:%04x\n", c);
|
|
return c;
|
|
}
|
|
|
|
int
|
|
kbdc_get_device_mask(KBDC p)
|
|
{
|
|
return kbdcp(p)->command_mask;
|
|
}
|
|
|
|
void
|
|
kbdc_set_device_mask(KBDC p, int mask)
|
|
{
|
|
kbdcp(p)->command_mask =
|
|
mask & (KBD_KBD_CONTROL_BITS | KBD_AUX_CONTROL_BITS);
|
|
}
|
|
|
|
int
|
|
get_controller_command_byte(KBDC p)
|
|
{
|
|
if (kbdcp(p)->command_byte != -1)
|
|
return kbdcp(p)->command_byte;
|
|
if (!write_controller_command(p, KBDC_GET_COMMAND_BYTE))
|
|
return -1;
|
|
emptyq(&kbdcp(p)->kbd);
|
|
kbdcp(p)->command_byte = read_controller_data(p);
|
|
return kbdcp(p)->command_byte;
|
|
}
|
|
|
|
int
|
|
set_controller_command_byte(KBDC p, int mask, int command)
|
|
{
|
|
if (get_controller_command_byte(p) == -1)
|
|
return FALSE;
|
|
|
|
command = (kbdcp(p)->command_byte & ~mask) | (command & mask);
|
|
if (command & KBD_DISABLE_KBD_PORT) {
|
|
if (!write_controller_command(p, KBDC_DISABLE_KBD_PORT))
|
|
return FALSE;
|
|
}
|
|
if (!write_controller_command(p, KBDC_SET_COMMAND_BYTE))
|
|
return FALSE;
|
|
if (!write_controller_data(p, command))
|
|
return FALSE;
|
|
kbdcp(p)->command_byte = command;
|
|
|
|
if (verbose)
|
|
log(LOG_DEBUG, "kbdio: new command byte:%04x (set_controller...)\n",
|
|
command);
|
|
|
|
return TRUE;
|
|
}
|
|
#endif /* !PC98 */
|