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4cd94c8afb
It turns out that that heurstic used to determine if we have a Google coreboot, and thus have the i8042 emulation bugs, is incorrect. At least one Acer "Peppy" Chromebook has an issue because Acer space'd out the smbios.bios.version string we're using as part of the heuristic. So, if the version starts with a space, then enable the workarounds if the smbios.bios.reldate is 2018 or earlier. While not perfect, it should be a reasonable dividing line and still allow newer core boot-based machines that aren't Chromebooks to not have the workaround. Tested by: Matthias Apitz Sponsored by: Netflix MFC After: 3 days (14.0 candiate)
1263 lines
31 KiB
C
1263 lines
31 KiB
C
/*-
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* SPDX-License-Identifier: BSD-3-Clause
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*
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* Copyright (c) 1996-1999
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* 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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* from kbdio.c,v 1.13 1998/09/25 11:55:46 yokota Exp
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*/
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#include <sys/cdefs.h>
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#include "opt_kbd.h"
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#include <sys/param.h>
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#include <sys/systm.h>
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#include <sys/bus.h>
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#include <sys/malloc.h>
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#include <sys/syslog.h>
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#include <machine/bus.h>
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#include <machine/resource.h>
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#include <sys/rman.h>
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#if defined(__amd64__)
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#include <machine/clock.h>
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#endif
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#include <dev/atkbdc/atkbdcreg.h>
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#include <isa/isareg.h>
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/* constants */
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#define MAXKBDC 1 /* XXX */
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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 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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#define read_data(k) (bus_space_read_1((k)->iot, (k)->ioh0, 0))
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#define read_status(k) (bus_space_read_1((k)->iot, (k)->ioh1, 0))
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#define write_data(k, d) \
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(bus_space_write_1((k)->iot, (k)->ioh0, 0, (d)))
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#define write_command(k, d) \
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(bus_space_write_1((k)->iot, (k)->ioh1, 0, (d)))
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/* local variables */
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/*
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* We always need at least one copy of the kbdc_softc struct for the
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* low-level console. As the low-level console accesses the keyboard
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* controller before kbdc, and all other devices, is probed, we
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* statically allocate one entry. XXX
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*/
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static atkbdc_softc_t default_kbdc;
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static atkbdc_softc_t *atkbdc_softc[MAXKBDC] = { &default_kbdc };
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static int verbose = KBDIO_DEBUG;
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/* function prototypes */
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static int atkbdc_setup(atkbdc_softc_t *sc, bus_space_tag_t tag,
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bus_space_handle_t h0, bus_space_handle_t h1);
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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(atkbdc_softc_t *kbdc);
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static int wait_for_data(atkbdc_softc_t *kbdc);
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static int wait_for_kbd_data(atkbdc_softc_t *kbdc);
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static int wait_for_kbd_ack(atkbdc_softc_t *kbdc);
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static int wait_for_aux_data(atkbdc_softc_t *kbdc);
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static int wait_for_aux_ack(atkbdc_softc_t *kbdc);
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struct atkbdc_quirks {
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const char *bios_vendor;
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const char *maker;
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const char *product;
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const char *version;
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int quirk;
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};
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/* Old chromebooks running coreboot with i8042 emulation quirks */
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#define CHROMEBOOK_WORKAROUND \
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(KBDC_QUIRK_KEEP_ACTIVATED | KBDC_QUIRK_IGNORE_PROBE_RESULT | \
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KBDC_QUIRK_RESET_AFTER_PROBE | KBDC_QUIRK_SETLEDS_ON_INIT)
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static struct atkbdc_quirks quirks[] = {
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/*
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* Older chromebooks running coreboot have an EC that imperfectly emulates
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* i8042 w/o fixes to its firmware. Since we can't probe for the problem,
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* include all chromebooks by matching 'Google_' in the bios version string
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* or a maker of either 'Google' or 'GOOGLE'. This is imperfect, but catches
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* all chromebooks while omitting non-Google systems from System76 and
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* Purism.
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*/
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{"coreboot", NULL, NULL, "Google_", CHROMEBOOK_WORKAROUND},
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{"coreboot", "GOOGLE", NULL, NULL, CHROMEBOOK_WORKAROUND},
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{"coreboot", "Google", NULL, NULL, CHROMEBOOK_WORKAROUND},
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/* KBDC hangs on Lenovo X120e and X121e after disabling AUX MUX */
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{NULL, "LENOVO", NULL, NULL, KBDC_QUIRK_DISABLE_MUX_PROBE},
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};
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#define QUIRK_STR_EQUAL(s1, s2) \
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(s1 == NULL || \
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(s2 != NULL && strcmp(s1, s2) == 0))
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#define QUIRK_STR_MATCH(s1, s2) \
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(s1 == NULL || \
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(s2 != NULL && strncmp(s1, s2, strlen(s1)) == 0))
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static int
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atkbdc_getquirks(void)
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{
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int i;
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char *bios_vendor = kern_getenv("smbios.bios.vendor");
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char *maker = kern_getenv("smbios.system.maker");
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char *product = kern_getenv("smbios.system.product");
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char *version = kern_getenv("smbios.bios.version");
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char *reldate = kern_getenv("smbios.bios.reldate");
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for (i = 0; i < nitems(quirks); i++)
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if (QUIRK_STR_EQUAL(quirks[i].bios_vendor, bios_vendor) &&
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QUIRK_STR_EQUAL(quirks[i].maker, maker) &&
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QUIRK_STR_EQUAL(quirks[i].product, product) &&
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QUIRK_STR_MATCH(quirks[i].version, version))
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return (quirks[i].quirk);
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/*
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* Some Chromebooks don't conform to the google comment above so do the
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* Chromebook workaround for all <= 2018 coreboot systems that have a
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* 'blank' version. At least one Acer "Peppy" chromebook has this issue,
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* with a reldate of 08/13/2014.
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*/
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if (QUIRK_STR_EQUAL("coreboot", bios_vendor) &&
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(version != NULL && *version == ' ') &&
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(reldate != NULL && strlen(reldate) >= 10 && strcmp(reldate + 6, "2018") <= 0))
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return (CHROMEBOOK_WORKAROUND);
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return (0);
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}
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atkbdc_softc_t
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*atkbdc_get_softc(int unit)
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{
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atkbdc_softc_t *sc;
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if (unit >= nitems(atkbdc_softc))
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return NULL;
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sc = atkbdc_softc[unit];
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if (sc == NULL) {
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sc = atkbdc_softc[unit]
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= malloc(sizeof(*sc), M_DEVBUF, M_NOWAIT | M_ZERO);
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if (sc == NULL)
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return NULL;
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}
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return sc;
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}
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int
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atkbdc_probe_unit(int unit, struct resource *port0, struct resource *port1)
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{
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if (rman_get_start(port0) <= 0)
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return ENXIO;
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if (rman_get_start(port1) <= 0)
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return ENXIO;
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return 0;
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}
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int
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atkbdc_attach_unit(int unit, atkbdc_softc_t *sc, struct resource *port0,
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struct resource *port1)
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{
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return atkbdc_setup(sc, rman_get_bustag(port0),
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rman_get_bushandle(port0),
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rman_get_bushandle(port1));
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}
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/* the backdoor to the keyboard controller! XXX */
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int
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atkbdc_configure(void)
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{
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bus_space_tag_t tag;
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bus_space_handle_t h0;
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bus_space_handle_t h1;
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#if defined(__i386__) || defined(__amd64__)
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volatile int i;
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register_t flags;
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#endif
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int port0;
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int port1;
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/* XXX: tag should be passed from the caller */
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#if defined(__amd64__) || defined(__i386__)
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tag = X86_BUS_SPACE_IO;
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#else
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#error "define tag!"
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#endif
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port0 = IO_KBD;
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resource_int_value("atkbdc", 0, "port", &port0);
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port1 = IO_KBD + KBD_STATUS_PORT;
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#ifdef notyet
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bus_space_map(tag, port0, IO_KBDSIZE, 0, &h0);
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bus_space_map(tag, port1, IO_KBDSIZE, 0, &h1);
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#else
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h0 = (bus_space_handle_t)port0;
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h1 = (bus_space_handle_t)port1;
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#endif
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#if defined(__i386__) || defined(__amd64__)
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/*
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* Check if we really have AT keyboard controller. Poll status
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* register until we get "all clear" indication. If no such
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* indication comes, it probably means that there is no AT
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* keyboard controller present. Give up in such case. Check relies
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* on the fact that reading from non-existing in/out port returns
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* 0xff on i386. May or may not be true on other platforms.
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*/
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flags = intr_disable();
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for (i = 0; i != 65535; i++) {
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if ((bus_space_read_1(tag, h1, 0) & 0x2) == 0)
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break;
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}
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intr_restore(flags);
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if (i == 65535)
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return ENXIO;
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#endif
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return atkbdc_setup(atkbdc_softc[0], tag, h0, h1);
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}
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static int
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atkbdc_setup(atkbdc_softc_t *sc, bus_space_tag_t tag, bus_space_handle_t h0,
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bus_space_handle_t h1)
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{
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#if defined(__amd64__)
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u_int64_t tscval[3], read_delay;
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register_t flags;
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#endif
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if (sc->ioh0 == 0) { /* XXX */
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sc->command_byte = -1;
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sc->command_mask = 0;
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sc->lock = FALSE;
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sc->kbd.head = sc->kbd.tail = 0;
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sc->aux.head = sc->aux.tail = 0;
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sc->aux_mux_enabled = FALSE;
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#if KBDIO_DEBUG >= 2
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sc->kbd.call_count = 0;
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sc->kbd.qcount = sc->kbd.max_qcount = 0;
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sc->aux.call_count = 0;
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sc->aux.qcount = sc->aux.max_qcount = 0;
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#endif
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}
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sc->iot = tag;
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sc->ioh0 = h0;
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sc->ioh1 = h1;
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#if defined(__amd64__)
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/*
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* On certain chipsets AT keyboard controller isn't present and is
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* emulated by BIOS using SMI interrupt. On those chipsets reading
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* from the status port may be thousand times slower than usually.
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* Sometimes this emilation is not working properly resulting in
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* commands timing our and since we assume that inb() operation
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* takes very little time to complete we need to adjust number of
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* retries to keep waiting time within a designed limits (100ms).
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* Measure time it takes to make read_status() call and adjust
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* number of retries accordingly.
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*/
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flags = intr_disable();
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tscval[0] = rdtsc();
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read_status(sc);
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tscval[1] = rdtsc();
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DELAY(1000);
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tscval[2] = rdtsc();
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intr_restore(flags);
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read_delay = tscval[1] - tscval[0];
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read_delay /= (tscval[2] - tscval[1]) / 1000;
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sc->retry = 100000 / ((KBDD_DELAYTIME * 2) + read_delay);
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#else
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sc->retry = 5000;
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#endif
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sc->quirks = atkbdc_getquirks();
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return 0;
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}
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/* open a keyboard controller */
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KBDC
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atkbdc_open(int unit)
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{
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if (unit <= 0)
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unit = 0;
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if (unit >= MAXKBDC)
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return NULL;
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if ((atkbdc_softc[unit]->port0 != NULL)
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|| (atkbdc_softc[unit]->ioh0 != 0)) /* XXX */
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return atkbdc_softc[unit];
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return NULL;
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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 drivers which utilize 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 poll 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
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* 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 any
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* necessary I/O operation within one invocation of the routine.
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* This means 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 = p->lock;
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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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return (availq(&p->kbd) || availq(&p->aux)
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|| (read_status(p) & KBDS_ANY_BUFFER_FULL));
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}
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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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/*
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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 atkbdc_softc *kbdc)
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{
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int retry;
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int f;
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/* CPU will stay inside the loop for 100msec at most */
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retry = kbdc->retry;
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while ((f = read_status(kbdc)) & 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, read_data(kbdc));
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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, read_data(kbdc));
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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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/*
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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 atkbdc_softc *kbdc)
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{
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int retry;
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int f;
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/* CPU will stay inside the loop for 200msec at most */
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retry = kbdc->retry * 2;
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while ((f = read_status(kbdc) & KBDS_ANY_BUFFER_FULL) == 0) {
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|
DELAY(KBDC_DELAYTIME);
|
|
if (--retry < 0)
|
|
return 0;
|
|
}
|
|
DELAY(KBDD_DELAYTIME);
|
|
return f;
|
|
}
|
|
|
|
/* wait for data from the keyboard */
|
|
static int
|
|
wait_for_kbd_data(struct atkbdc_softc *kbdc)
|
|
{
|
|
int retry;
|
|
int f;
|
|
|
|
/* CPU will stay inside the loop for 200msec at most */
|
|
retry = kbdc->retry * 2;
|
|
|
|
while ((f = read_status(kbdc) & KBDS_BUFFER_FULL)
|
|
!= KBDS_KBD_BUFFER_FULL) {
|
|
if (f == KBDS_AUX_BUFFER_FULL) {
|
|
DELAY(KBDD_DELAYTIME);
|
|
addq(&kbdc->aux, read_data(kbdc));
|
|
}
|
|
DELAY(KBDC_DELAYTIME);
|
|
if (--retry < 0)
|
|
return 0;
|
|
}
|
|
DELAY(KBDD_DELAYTIME);
|
|
return f;
|
|
}
|
|
|
|
/*
|
|
* wait for an ACK(FAh), RESEND(FEh), or RESET_FAIL(FCh) from the keyboard.
|
|
* queue anything else.
|
|
*/
|
|
static int
|
|
wait_for_kbd_ack(struct atkbdc_softc *kbdc)
|
|
{
|
|
int retry;
|
|
int f;
|
|
int b;
|
|
|
|
/* CPU will stay inside the loop for 200msec at most */
|
|
retry = kbdc->retry * 2;
|
|
|
|
while (retry-- > 0) {
|
|
if ((f = read_status(kbdc)) & KBDS_ANY_BUFFER_FULL) {
|
|
DELAY(KBDD_DELAYTIME);
|
|
b = read_data(kbdc);
|
|
if ((f & KBDS_BUFFER_FULL) == KBDS_KBD_BUFFER_FULL) {
|
|
if ((b == KBD_ACK) || (b == KBD_RESEND)
|
|
|| (b == KBD_RESET_FAIL))
|
|
return b;
|
|
addq(&kbdc->kbd, b);
|
|
} else if ((f & KBDS_BUFFER_FULL) == KBDS_AUX_BUFFER_FULL) {
|
|
addq(&kbdc->aux, b);
|
|
}
|
|
}
|
|
DELAY(KBDC_DELAYTIME);
|
|
}
|
|
return -1;
|
|
}
|
|
|
|
/* wait for data from the aux device */
|
|
static int
|
|
wait_for_aux_data(struct atkbdc_softc *kbdc)
|
|
{
|
|
int retry;
|
|
int f;
|
|
|
|
/* CPU will stay inside the loop for 200msec at most */
|
|
retry = kbdc->retry * 2;
|
|
|
|
while ((f = read_status(kbdc) & KBDS_BUFFER_FULL)
|
|
!= KBDS_AUX_BUFFER_FULL) {
|
|
if (f == KBDS_KBD_BUFFER_FULL) {
|
|
DELAY(KBDD_DELAYTIME);
|
|
addq(&kbdc->kbd, read_data(kbdc));
|
|
}
|
|
DELAY(KBDC_DELAYTIME);
|
|
if (--retry < 0)
|
|
return 0;
|
|
}
|
|
DELAY(KBDD_DELAYTIME);
|
|
return f;
|
|
}
|
|
|
|
/*
|
|
* wait for an ACK(FAh), RESEND(FEh), or RESET_FAIL(FCh) from the aux device.
|
|
* queue anything else.
|
|
*/
|
|
static int
|
|
wait_for_aux_ack(struct atkbdc_softc *kbdc)
|
|
{
|
|
int retry;
|
|
int f;
|
|
int b;
|
|
|
|
/* CPU will stay inside the loop for 200msec at most */
|
|
retry = kbdc->retry * 2;
|
|
|
|
while (retry-- > 0) {
|
|
if ((f = read_status(kbdc)) & KBDS_ANY_BUFFER_FULL) {
|
|
DELAY(KBDD_DELAYTIME);
|
|
b = read_data(kbdc);
|
|
if ((f & KBDS_BUFFER_FULL) == KBDS_AUX_BUFFER_FULL) {
|
|
if ((b == PSM_ACK) || (b == PSM_RESEND)
|
|
|| (b == PSM_RESET_FAIL))
|
|
return b;
|
|
addq(&kbdc->aux, b);
|
|
} else if ((f & KBDS_BUFFER_FULL) == KBDS_KBD_BUFFER_FULL) {
|
|
addq(&kbdc->kbd, b);
|
|
}
|
|
}
|
|
DELAY(KBDC_DELAYTIME);
|
|
}
|
|
return -1;
|
|
}
|
|
|
|
/* write a one byte command to the controller */
|
|
int
|
|
write_controller_command(KBDC p, int c)
|
|
{
|
|
if (!wait_while_controller_busy(p))
|
|
return FALSE;
|
|
write_command(p, c);
|
|
return TRUE;
|
|
}
|
|
|
|
/* write a one byte data to the controller */
|
|
int
|
|
write_controller_data(KBDC p, int c)
|
|
{
|
|
if (!wait_while_controller_busy(p))
|
|
return FALSE;
|
|
write_data(p, c);
|
|
return TRUE;
|
|
}
|
|
|
|
/* write a one byte keyboard command */
|
|
int
|
|
write_kbd_command(KBDC p, int c)
|
|
{
|
|
if (!wait_while_controller_busy(p))
|
|
return FALSE;
|
|
write_data(p, c);
|
|
return TRUE;
|
|
}
|
|
|
|
/* write a one byte auxiliary device command */
|
|
int
|
|
write_aux_command(KBDC p, int c)
|
|
{
|
|
int f;
|
|
|
|
f = aux_mux_is_enabled(p) ?
|
|
KBDC_WRITE_TO_AUX_MUX + p->aux_mux_port : KBDC_WRITE_TO_AUX;
|
|
|
|
if (!write_controller_command(p, f))
|
|
return FALSE;
|
|
return write_controller_data(p, c);
|
|
}
|
|
|
|
/* send a command to the keyboard and wait for ACK */
|
|
int
|
|
send_kbd_command(KBDC p, int c)
|
|
{
|
|
int retry = KBD_MAXRETRY;
|
|
int res = -1;
|
|
|
|
while (retry-- > 0) {
|
|
if (!write_kbd_command(p, c))
|
|
continue;
|
|
res = wait_for_kbd_ack(p);
|
|
if (res == KBD_ACK)
|
|
break;
|
|
}
|
|
return res;
|
|
}
|
|
|
|
/* send a command to the auxiliary device and wait for ACK */
|
|
int
|
|
send_aux_command(KBDC p, int c)
|
|
{
|
|
int retry = KBD_MAXRETRY;
|
|
int res = -1;
|
|
|
|
while (retry-- > 0) {
|
|
if (!write_aux_command(p, c))
|
|
continue;
|
|
/*
|
|
* FIXME: XXX
|
|
* The aux device may have already sent one or two bytes of
|
|
* status data, when a command is received. It will immediately
|
|
* 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(&p->aux);
|
|
res = wait_for_aux_ack(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(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(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(&p->aux);
|
|
res = wait_for_aux_ack(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(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(&p->kbd))
|
|
return removeq(&p->kbd);
|
|
if (availq(&p->aux))
|
|
return removeq(&p->aux);
|
|
if (!wait_for_data(p))
|
|
return -1; /* timeout */
|
|
return read_data(p);
|
|
}
|
|
|
|
#if KBDIO_DEBUG >= 2
|
|
static int call = 0;
|
|
#endif
|
|
|
|
/* read one byte from the keyboard */
|
|
int
|
|
read_kbd_data(KBDC p)
|
|
{
|
|
#if KBDIO_DEBUG >= 2
|
|
if (++call > 2000) {
|
|
call = 0;
|
|
log(LOG_DEBUG, "kbdc: kbd q: %d calls, max %d chars, "
|
|
"aux q: %d calls, max %d chars\n",
|
|
p->kbd.call_count, p->kbd.max_qcount,
|
|
p->aux.call_count, p->aux.max_qcount);
|
|
}
|
|
#endif
|
|
|
|
if (availq(&p->kbd))
|
|
return removeq(&p->kbd);
|
|
if (!wait_for_kbd_data(p))
|
|
return -1; /* timeout */
|
|
return read_data(p);
|
|
}
|
|
|
|
/* read one byte from the keyboard, but return immediately if
|
|
* no data is waiting
|
|
*/
|
|
int
|
|
read_kbd_data_no_wait(KBDC p)
|
|
{
|
|
int f;
|
|
|
|
#if KBDIO_DEBUG >= 2
|
|
if (++call > 2000) {
|
|
call = 0;
|
|
log(LOG_DEBUG, "kbdc: kbd q: %d calls, max %d chars, "
|
|
"aux q: %d calls, max %d chars\n",
|
|
p->kbd.call_count, p->kbd.max_qcount,
|
|
p->aux.call_count, p->aux.max_qcount);
|
|
}
|
|
#endif
|
|
|
|
if (availq(&p->kbd))
|
|
return removeq(&p->kbd);
|
|
f = read_status(p) & KBDS_BUFFER_FULL;
|
|
if (f == KBDS_AUX_BUFFER_FULL) {
|
|
DELAY(KBDD_DELAYTIME);
|
|
addq(&p->aux, read_data(p));
|
|
f = read_status(p) & KBDS_BUFFER_FULL;
|
|
}
|
|
if (f == KBDS_KBD_BUFFER_FULL) {
|
|
DELAY(KBDD_DELAYTIME);
|
|
return read_data(p);
|
|
}
|
|
return -1; /* no data */
|
|
}
|
|
|
|
/* read one byte from the aux device */
|
|
int
|
|
read_aux_data(KBDC p)
|
|
{
|
|
if (availq(&p->aux))
|
|
return removeq(&p->aux);
|
|
if (!wait_for_aux_data(p))
|
|
return -1; /* timeout */
|
|
return read_data(p);
|
|
}
|
|
|
|
/* 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(&p->aux))
|
|
return removeq(&p->aux);
|
|
f = read_status(p) & KBDS_BUFFER_FULL;
|
|
if (f == KBDS_KBD_BUFFER_FULL) {
|
|
DELAY(KBDD_DELAYTIME);
|
|
addq(&p->kbd, read_data(p));
|
|
f = read_status(p) & KBDS_BUFFER_FULL;
|
|
}
|
|
if (f == KBDS_AUX_BUFFER_FULL) {
|
|
DELAY(KBDD_DELAYTIME);
|
|
return read_data(p);
|
|
}
|
|
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 = read_status(p)) & KBDS_ANY_BUFFER_FULL) {
|
|
DELAY(KBDD_DELAYTIME);
|
|
b = read_data(p);
|
|
if ((f & KBDS_BUFFER_FULL) == KBDS_AUX_BUFFER_FULL) {
|
|
addq(&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, "kbdc: %d:%d char read (empty_kbd_buffer)\n", c1, c2);
|
|
#endif
|
|
|
|
emptyq(&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 = read_status(p)) & KBDS_ANY_BUFFER_FULL) {
|
|
DELAY(KBDD_DELAYTIME);
|
|
b = read_data(p);
|
|
if ((f & KBDS_BUFFER_FULL) == KBDS_KBD_BUFFER_FULL) {
|
|
addq(&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, "kbdc: %d:%d char read (empty_aux_buffer)\n", c1, c2);
|
|
#endif
|
|
|
|
emptyq(&p->aux);
|
|
}
|
|
|
|
/* discard any data from the keyboard or the aux device */
|
|
void
|
|
empty_both_buffers(KBDC p, int wait)
|
|
{
|
|
int t;
|
|
int f;
|
|
int waited = 0;
|
|
#if KBDIO_DEBUG >= 2
|
|
int c1 = 0;
|
|
int c2 = 0;
|
|
#endif
|
|
int delta = 2;
|
|
|
|
for (t = wait; t > 0; ) {
|
|
if ((f = read_status(p)) & KBDS_ANY_BUFFER_FULL) {
|
|
DELAY(KBDD_DELAYTIME);
|
|
(void)read_data(p);
|
|
#if KBDIO_DEBUG >= 2
|
|
if ((f & KBDS_BUFFER_FULL) == KBDS_KBD_BUFFER_FULL)
|
|
++c1;
|
|
else
|
|
++c2;
|
|
#endif
|
|
t = wait;
|
|
} else {
|
|
t -= delta;
|
|
}
|
|
|
|
/*
|
|
* Some systems (Intel/IBM blades) do not have keyboard devices and
|
|
* will thus hang in this procedure. Time out after delta seconds to
|
|
* avoid this hang -- the keyboard attach will fail later on.
|
|
*/
|
|
waited += (delta * 1000);
|
|
if (waited == (delta * 1000000))
|
|
return;
|
|
|
|
DELAY(delta*1000);
|
|
}
|
|
#if KBDIO_DEBUG >= 2
|
|
if ((c1 > 0) || (c2 > 0))
|
|
log(LOG_DEBUG, "kbdc: %d:%d char read (empty_both_buffers)\n", c1, c2);
|
|
#endif
|
|
|
|
emptyq(&p->kbd);
|
|
emptyq(&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(&p->kbd);
|
|
c = read_controller_data(p);
|
|
if (verbose || bootverbose)
|
|
log(LOG_DEBUG, "kbdc: 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, "kbdc: 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(&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, "kbdc: 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, "kbdc: 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, "kbdc: 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(&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, "kbdc: 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(&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, "kbdc: 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(&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, "kbdc: TEST_AUX_PORT status:%04x\n", c);
|
|
return c;
|
|
}
|
|
|
|
int
|
|
kbdc_get_device_mask(KBDC p)
|
|
{
|
|
return p->command_mask;
|
|
}
|
|
|
|
void
|
|
kbdc_set_device_mask(KBDC p, int mask)
|
|
{
|
|
p->command_mask =
|
|
mask & (((p->quirks & KBDC_QUIRK_KEEP_ACTIVATED)
|
|
? 0 : KBD_KBD_CONTROL_BITS) | KBD_AUX_CONTROL_BITS);
|
|
}
|
|
|
|
int
|
|
get_controller_command_byte(KBDC p)
|
|
{
|
|
if (p->command_byte != -1)
|
|
return p->command_byte;
|
|
if (!write_controller_command(p, KBDC_GET_COMMAND_BYTE))
|
|
return -1;
|
|
emptyq(&p->kbd);
|
|
p->command_byte = read_controller_data(p);
|
|
return p->command_byte;
|
|
}
|
|
|
|
int
|
|
set_controller_command_byte(KBDC p, int mask, int command)
|
|
{
|
|
if (get_controller_command_byte(p) == -1)
|
|
return FALSE;
|
|
|
|
command = (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;
|
|
p->command_byte = command;
|
|
|
|
if (verbose)
|
|
log(LOG_DEBUG, "kbdc: new command byte:%04x (set_controller...)\n",
|
|
command);
|
|
|
|
return TRUE;
|
|
}
|
|
|
|
/*
|
|
* Rudimentary support for active PS/2 AUX port multiplexing.
|
|
* Only write commands can be routed to a selected AUX port.
|
|
* Source port of data processed by read commands is totally ignored.
|
|
*/
|
|
static int
|
|
set_aux_mux_state(KBDC p, int enabled)
|
|
{
|
|
int command, version;
|
|
|
|
if (write_controller_command(p, KBDC_FORCE_AUX_OUTPUT) == 0 ||
|
|
write_controller_data(p, 0xF0) == 0 ||
|
|
read_controller_data(p) != 0xF0)
|
|
return (-1);
|
|
|
|
if (write_controller_command(p, KBDC_FORCE_AUX_OUTPUT) == 0 ||
|
|
write_controller_data(p, 0x56) == 0 ||
|
|
read_controller_data(p) != 0x56)
|
|
return (-1);
|
|
|
|
command = enabled ? 0xa4 : 0xa5;
|
|
if (write_controller_command(p, KBDC_FORCE_AUX_OUTPUT) == 0 ||
|
|
write_controller_data(p, command) == 0 ||
|
|
(version = read_controller_data(p)) == command)
|
|
return (-1);
|
|
|
|
return (version);
|
|
}
|
|
|
|
int
|
|
set_active_aux_mux_port(KBDC p, int port)
|
|
{
|
|
|
|
if (!aux_mux_is_enabled(p))
|
|
return (FALSE);
|
|
|
|
if (port < 0 || port >= KBDC_AUX_MUX_NUM_PORTS)
|
|
return (FALSE);
|
|
|
|
p->aux_mux_port = port;
|
|
|
|
return (TRUE);
|
|
}
|
|
|
|
/* Checks for active multiplexing support and enables it */
|
|
int
|
|
enable_aux_mux(KBDC p)
|
|
{
|
|
int version;
|
|
|
|
version = set_aux_mux_state(p, TRUE);
|
|
if (version >= 0) {
|
|
p->aux_mux_enabled = TRUE;
|
|
set_active_aux_mux_port(p, 0);
|
|
}
|
|
|
|
return (version);
|
|
}
|
|
|
|
int
|
|
disable_aux_mux(KBDC p)
|
|
{
|
|
|
|
p->aux_mux_enabled = FALSE;
|
|
|
|
return (set_aux_mux_state(p, FALSE));
|
|
}
|
|
|
|
int
|
|
aux_mux_is_enabled(KBDC p)
|
|
{
|
|
|
|
return (p->aux_mux_enabled);
|
|
}
|