852962d3c5
share their IRQ lines with the i8042. Any IRQ activity (typically during attach) on the NS16550 used to connect the keyboard when actually the PS/2 keyboard is selected in OFW causes interaction with the OBP i8042 driver resulting in a hang (and vice versa). As RS232 keyboards and mice obviously aren't meant to be used in parallel with PS/2 ones on these boards don't attach to these NS16550 in case the RS232 keyboard isn't selected in order to prevent such hangs. Ok'ed by: marcel
109 lines
3.5 KiB
C
109 lines
3.5 KiB
C
/*-
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* Copyright (c) 2001 by Thomas Moestl <tmm@FreeBSD.org>.
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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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*
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* THIS SOFTWARE IS PROVIDED BY THE AUTHOR ``AS IS'' AND ANY EXPRESS OR
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* IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED WARRANTIES
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* OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE DISCLAIMED.
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* IN NO EVENT SHALL THE AUTHOR OR CONTRIBUTORS BE LIABLE FOR ANY DIRECT,
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* INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES
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* (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR
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* SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER
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* 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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#include <sys/cdefs.h>
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__FBSDID("$FreeBSD$");
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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/kernel.h>
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#include <sys/module.h>
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#include <dev/ofw/ofw_bus.h>
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#include <machine/bus.h>
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#include <sys/rman.h>
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#include <machine/resource.h>
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#include <machine/ver.h>
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#include <dev/uart/uart.h>
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#include <dev/uart/uart_bus.h>
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#include <dev/uart/uart_cpu.h>
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static int uart_ebus_probe(device_t dev);
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static device_method_t uart_ebus_methods[] = {
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/* Device interface */
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DEVMETHOD(device_probe, uart_ebus_probe),
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DEVMETHOD(device_attach, uart_bus_attach),
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DEVMETHOD(device_detach, uart_bus_detach),
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{ 0, 0 }
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};
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static driver_t uart_ebus_driver = {
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uart_driver_name,
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uart_ebus_methods,
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sizeof(struct uart_softc),
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};
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static int
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uart_ebus_probe(device_t dev)
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{
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const char *nm, *cmpt;
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struct uart_softc *sc;
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struct uart_devinfo dummy;
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int error;
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sc = device_get_softc(dev);
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sc->sc_class = NULL;
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nm = ofw_bus_get_name(dev);
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cmpt = ofw_bus_get_compat(dev);
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if (!strcmp(nm, "su") || !strcmp(nm, "su_pnp") || (cmpt != NULL &&
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(!strcmp(cmpt, "su") || !strcmp(cmpt, "su16550")))) {
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/*
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* On AXi and AXmp boards the NS16550 (used to connect
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* keyboard/mouse) share their IRQ lines with the i8042.
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* Any IRQ activity (typically during attach) of the
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* NS16550 used to connect the keyboard when actually the
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* PS/2 keyboard is selected in OFW causes interaction
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* with the OBP i8042 driver resulting in a hang and vice
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* versa. As RS232 keyboards and mice obviously aren't
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* meant to be used in parallel with PS/2 ones on these
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* boards don't attach to the NS16550 in case the RS232
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* keyboard isn't selected in order to prevent such hangs.
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*/
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if ((!strcmp(sparc64_model, "SUNW,UltraAX-MP") ||
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!strcmp(sparc64_model, "SUNW,UltraSPARC-IIi-Engine")) &&
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uart_cpu_getdev(UART_DEV_KEYBOARD, &dummy)) {
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device_disable(dev);
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return (ENXIO);
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}
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sc->sc_class = &uart_ns8250_class;
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return (uart_bus_probe(dev, 0, 0, 0, 0));
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}
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if (!strcmp(nm, "se")) {
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sc->sc_class = &uart_sab82532_class;
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error = uart_bus_probe(dev, 0, 0, 0, 1);
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return ((error) ? error : -1);
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}
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return (ENXIO);
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}
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DRIVER_MODULE(uart, ebus, uart_ebus_driver, uart_devclass, 0, 0);
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