8a962f23f2
the original ad-audiomp branch notes: Add MP locking to the audio drivers. Making the audio drivers MP safe is necessary before efforts can be made to make the VM system MP safe. The are two locks per device instance, an ISR lock and a character device lock. The ISR lock replaces calls to splaudio()/splx(), and will be held across calls to device methods which were called at splaudio() before (e.g. trigger_output). The character device lock is held across calls to nearly all of the methods, excluding some only used for initialization, e.g. get_locks. Welcome to 5.99.57.
133 lines
3.8 KiB
C
133 lines
3.8 KiB
C
/* $NetBSD: joy_ofisa.c,v 1.15 2011/11/23 23:07:33 jmcneill Exp $ */
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/*-
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* Copyright (c) 1996, 1998, 2008 The NetBSD Foundation, Inc.
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* All rights reserved.
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*
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* This code is derived from software contributed to The NetBSD Foundation
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* by Jason R. Thorpe.
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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 NETBSD FOUNDATION, INC. AND CONTRIBUTORS
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* ``AS IS'' AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED
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* TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR
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* PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE FOUNDATION OR CONTRIBUTORS
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* BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR
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* CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF
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* SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS
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* INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN
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* CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE)
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* ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE
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* POSSIBILITY OF SUCH DAMAGE.
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*/
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#include <sys/cdefs.h>
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__KERNEL_RCSID(0, "$NetBSD: joy_ofisa.c,v 1.15 2011/11/23 23:07:33 jmcneill Exp $");
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#include <sys/param.h>
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#include <sys/systm.h>
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#include <sys/kernel.h>
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#include <sys/device.h>
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#include <sys/bus.h>
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#include <dev/ofw/openfirm.h>
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#include <dev/isa/isavar.h>
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#include <dev/ofisa/ofisavar.h>
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#include <dev/ic/joyvar.h>
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#define JOY_NPORTS 1 /* XXX should be in a header file */
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struct joy_ofisa_softc {
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struct joy_softc sc_joy;
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kmutex_t sc_lock;
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};
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static int joy_ofisa_match(device_t, cfdata_t, void *);
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static void joy_ofisa_attach(device_t, device_t, void *);
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CFATTACH_DECL_NEW(joy_ofisa, sizeof(struct joy_ofisa_softc),
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joy_ofisa_match, joy_ofisa_attach, NULL, NULL);
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static int
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joy_ofisa_match(device_t parent, cfdata_t match, void *aux)
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{
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struct ofisa_attach_args *aa = aux;
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static const char *const compatible_strings[] = {
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"pnpPNP,b02f", /* generic joystick */
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NULL,
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};
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int rv = 0;
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if (of_compatible(aa->oba.oba_phandle, compatible_strings) != -1)
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rv = 1;
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return rv;
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}
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static void
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joy_ofisa_attach(device_t parent, device_t self, void *aux)
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{
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struct joy_ofisa_softc *osc = device_private(self);
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struct joy_softc *sc = &osc->sc_joy;
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struct ofisa_attach_args *aa = aux;
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struct ofisa_reg_desc reg;
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char *model = NULL;
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int n;
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/*
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* We're living on an OFW. We have to ask the OFW what our
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* register property looks like.
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*
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* We expect:
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*
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* 1 i/o register region
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*/
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n = ofisa_reg_get(aa->oba.oba_phandle, ®, 1);
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if (n != 1) {
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aprint_error(": error getting register data\n");
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return;
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}
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if (reg.type != OFISA_REG_TYPE_IO) {
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aprint_error(": register type not i/o\n");
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return;
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}
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if (reg.len != JOY_NPORTS) {
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aprint_error(": weird register size (%lu, expected %d)\n",
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(unsigned long)reg.len, JOY_NPORTS);
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return;
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}
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sc->sc_iot = aa->iot;
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sc->sc_dev = self;
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if (bus_space_map(sc->sc_iot, reg.addr, reg.len, 0, &sc->sc_ioh)) {
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aprint_error(": unable to map register space\n");
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return;
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}
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n = OF_getproplen(aa->oba.oba_phandle, "model");
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if (n > 0) {
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model = alloca(n);
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if (OF_getprop(aa->oba.oba_phandle, "model", model, n) != n)
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model = NULL; /* safe; alloca */
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}
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if (model != NULL)
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aprint_normal(": %s", model);
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aprint_normal("\n");
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mutex_init(&osc->sc_lock, MUTEX_DEFAULT, IPL_NONE);
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sc->sc_lock = &osc->sc_lock;
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joyattach(sc);
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}
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