1bba41a506
is that the JBus to EBus bridges share the interrupt controller of a sibling JBus to PCIe bridge (at least as far as the OFW device tree is concerned, in reality they are part of the same chip) so we have to probe and attach the latter first. That happens to be also the case due to the fact that the JBus to PCIe bridges appear first in the OFW device tree but it doesn't hurt to ensure the right order.
322 lines
8.6 KiB
C
322 lines
8.6 KiB
C
/*-
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* Copyright (c) 2004 Pyun YongHyeon
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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 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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*/
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/* $NetBSD: auxio.c,v 1.11 2003/07/15 03:36:04 lukem Exp $ */
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/*-
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* Copyright (c) 2000, 2001 Matthew R. Green
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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 products
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* derived from this software without specific prior written permission.
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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 BE LIABLE FOR ANY DIRECT, INDIRECT,
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* INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING,
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* BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES;
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* LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED
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* AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY,
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* 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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/*
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* AUXIO registers support on the SBus & EBus2, used for the floppy driver
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* and to control the system LED, for the BLINK option.
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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/lock.h>
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#include <sys/module.h>
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#include <sys/mutex.h>
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#include <sys/resource.h>
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#include <sys/rman.h>
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#include <dev/led/led.h>
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#include <dev/ofw/ofw_bus.h>
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#include <dev/ofw/openfirm.h>
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#include <machine/bus.h>
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#include <machine/ofw_machdep.h>
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#include <machine/resource.h>
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#include <sparc64/sbus/sbusvar.h>
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#include <dev/auxio/auxioreg.h>
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/*
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* On sun4u, auxio exists with one register (LED) on the SBus, and 5
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* registers on the EBus2 (pci) (LED, PCIMODE, FREQUENCY, SCSI
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* OSCILLATOR, and TEMP SENSE.
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*/
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#define AUXIO_PCIO_LED 0
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#define AUXIO_PCIO_PCI 1
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#define AUXIO_PCIO_FREQ 2
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#define AUXIO_PCIO_OSC 3
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#define AUXIO_PCIO_TEMP 4
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#define AUXIO_PCIO_NREG 5
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struct auxio_softc {
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struct device *sc_dev;
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int sc_nauxio;
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struct resource *sc_res[AUXIO_PCIO_NREG];
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int sc_rid[AUXIO_PCIO_NREG];
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bus_space_tag_t sc_regt[AUXIO_PCIO_NREG];
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bus_space_handle_t sc_regh[AUXIO_PCIO_NREG];
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struct cdev *sc_led_dev;
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u_int32_t sc_led_stat;
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int sc_flags;
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#define AUXIO_LEDONLY 0x1
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#define AUXIO_EBUS 0x2
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#define AUXIO_SBUS 0x4
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struct mtx sc_lock;
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};
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static void auxio_led_func(void *arg, int onoff);
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static int auxio_attach_common(struct auxio_softc *);
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static int auxio_bus_probe(device_t);
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static int auxio_sbus_attach(device_t);
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static int auxio_ebus_attach(device_t);
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static int auxio_bus_detach(device_t);
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static void auxio_free_resource(struct auxio_softc *);
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static __inline u_int32_t auxio_led_read(struct auxio_softc *);
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static __inline void auxio_led_write(struct auxio_softc *, u_int32_t);
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/* SBus */
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static device_method_t auxio_sbus_methods[] = {
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DEVMETHOD(device_probe, auxio_bus_probe),
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DEVMETHOD(device_attach, auxio_sbus_attach),
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DEVMETHOD(device_detach, auxio_bus_detach),
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{0, 0}
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};
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static driver_t auxio_sbus_driver = {
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"auxio",
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auxio_sbus_methods,
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sizeof(struct auxio_softc)
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};
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static devclass_t auxio_devclass;
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/* The probe order is handled by sbus(4). */
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EARLY_DRIVER_MODULE(auxio, sbus, auxio_sbus_driver, auxio_devclass, 0, 0,
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BUS_PASS_DEFAULT);
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MODULE_DEPEND(auxio, sbus, 1, 1, 1);
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/* EBus */
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static device_method_t auxio_ebus_methods[] = {
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DEVMETHOD(device_probe, auxio_bus_probe),
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DEVMETHOD(device_attach, auxio_ebus_attach),
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DEVMETHOD(device_detach, auxio_bus_detach),
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{0, 0}
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};
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static driver_t auxio_ebus_driver = {
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"auxio",
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auxio_ebus_methods,
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sizeof(struct auxio_softc)
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};
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EARLY_DRIVER_MODULE(auxio, ebus, auxio_ebus_driver, auxio_devclass, 0, 0,
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BUS_PASS_DEFAULT);
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MODULE_DEPEND(auxio, ebus, 1, 1, 1);
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MODULE_VERSION(auxio, 1);
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#define AUXIO_LOCK_INIT(sc) \
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mtx_init(&sc->sc_lock, "auxio mtx", NULL, MTX_DEF)
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#define AUXIO_LOCK(sc) mtx_lock(&sc->sc_lock)
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#define AUXIO_UNLOCK(sc) mtx_unlock(&sc->sc_lock)
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#define AUXIO_LOCK_DESTROY(sc) mtx_destroy(&sc->sc_lock)
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static __inline void
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auxio_led_write(struct auxio_softc *sc, u_int32_t v)
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{
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if (sc->sc_flags & AUXIO_EBUS)
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bus_space_write_4(sc->sc_regt[AUXIO_PCIO_LED],
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sc->sc_regh[AUXIO_PCIO_LED], 0, v);
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else
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bus_space_write_1(sc->sc_regt[AUXIO_PCIO_LED],
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sc->sc_regh[AUXIO_PCIO_LED], 0, v);
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}
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static __inline u_int32_t
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auxio_led_read(struct auxio_softc *sc)
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{
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u_int32_t led;
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if (sc->sc_flags & AUXIO_EBUS)
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led = bus_space_read_4(sc->sc_regt[AUXIO_PCIO_LED],
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sc->sc_regh[AUXIO_PCIO_LED], 0);
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else
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led = bus_space_read_1(sc->sc_regt[AUXIO_PCIO_LED],
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sc->sc_regh[AUXIO_PCIO_LED], 0);
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return (led);
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}
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static void
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auxio_led_func(void *arg, int onoff)
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{
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struct auxio_softc *sc;
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u_int32_t led;
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sc = (struct auxio_softc *)arg;
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AUXIO_LOCK(sc);
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/*
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* NB: We must not touch the other bits of the SBus AUXIO reg.
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*/
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led = auxio_led_read(sc);
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if (onoff)
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led |= AUXIO_LED_LED;
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else
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led &= ~AUXIO_LED_LED;
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auxio_led_write(sc, led);
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AUXIO_UNLOCK(sc);
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}
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static int
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auxio_bus_probe(device_t dev)
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{
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const char *name;
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name = ofw_bus_get_name(dev);
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if (strcmp("auxio", name) == 0) {
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device_set_desc(dev, "Sun Auxiliary I/O");
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return (0);
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}
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return (ENXIO);
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}
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static int
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auxio_ebus_attach(device_t dev)
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{
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struct auxio_softc *sc;
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sc = device_get_softc(dev);
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sc->sc_dev = dev;
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AUXIO_LOCK_INIT(sc);
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sc->sc_nauxio = AUXIO_PCIO_NREG;
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sc->sc_flags = AUXIO_LEDONLY | AUXIO_EBUS;
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return(auxio_attach_common(sc));
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}
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static int
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auxio_attach_common(struct auxio_softc *sc)
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{
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struct resource *res;
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int i;
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for (i = 0; i < sc->sc_nauxio; i++) {
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sc->sc_rid[i] = i;
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res = bus_alloc_resource_any(sc->sc_dev, SYS_RES_MEMORY,
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&sc->sc_rid[i], RF_ACTIVE);
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if (res == NULL) {
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device_printf(sc->sc_dev,
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"could not allocate resources\n");
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goto attach_fail;
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}
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sc->sc_res[i] = res;
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sc->sc_regt[i] = rman_get_bustag(res);
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sc->sc_regh[i] = rman_get_bushandle(res);
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}
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sc->sc_led_stat = auxio_led_read(sc) & AUXIO_LED_LED;
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sc->sc_led_dev = led_create(auxio_led_func, sc, "auxioled");
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/* turn on the LED */
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auxio_led_func(sc, 1);
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return (0);
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attach_fail:
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auxio_free_resource(sc);
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return (ENXIO);
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}
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static int
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auxio_bus_detach(device_t dev)
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{
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struct auxio_softc *sc;
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sc = device_get_softc(dev);
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led_destroy(sc->sc_led_dev);
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auxio_led_func(sc, sc->sc_led_stat);
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auxio_free_resource(sc);
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return (0);
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}
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static void
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auxio_free_resource(struct auxio_softc *sc)
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{
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int i;
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for (i = 0; i < sc->sc_nauxio; i++)
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if (sc->sc_res[i])
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bus_release_resource(sc->sc_dev, SYS_RES_MEMORY,
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sc->sc_rid[i], sc->sc_res[i]);
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AUXIO_LOCK_DESTROY(sc);
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}
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static int
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auxio_sbus_attach(device_t dev)
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{
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struct auxio_softc *sc;
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sc = device_get_softc(dev);
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sc->sc_dev = dev;
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AUXIO_LOCK_INIT(sc);
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sc->sc_nauxio = 1;
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sc->sc_flags = AUXIO_LEDONLY | AUXIO_SBUS;
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return (auxio_attach_common(sc));
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}
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