126 lines
3.8 KiB
C
126 lines
3.8 KiB
C
/* $NetBSD: becc_button.c,v 1.3 2005/12/11 12:16:51 christos Exp $ */
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/*
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* Copyright (c) 2003 Wasabi Systems, Inc.
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* All rights reserved.
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*
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* Written by Jason R. Thorpe for Wasabi Systems, Inc.
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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. All advertising materials mentioning features or use of this software
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* must display the following acknowledgement:
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* This product includes software developed for the NetBSD Project by
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* Wasabi Systems, Inc.
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* 4. The name of Wasabi Systems, Inc. may not be used to endorse
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* or promote products derived from this software without specific prior
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* written permission.
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*
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* THIS SOFTWARE IS PROVIDED BY WASABI SYSTEMS, INC. ``AS IS'' AND
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* 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 WASABI SYSTEMS, INC
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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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/*
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* Driver for the reset button on the ADI Engineering, Inc. Big Endian
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* Companion Chip.
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*
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* When pressed for two seconds, the reset button performs a hard reset
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* of the system. Shorter presses result in an interrupt being generated,
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* which the operating system can use to trigger a graceful reboot.
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*/
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#include <sys/cdefs.h>
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__KERNEL_RCSID(0, "$NetBSD: becc_button.c,v 1.3 2005/12/11 12:16:51 christos Exp $");
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#include <sys/param.h>
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#include <sys/systm.h>
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#include <sys/device.h>
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#include <arm/xscale/beccreg.h>
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#include <arm/xscale/beccvar.h>
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#include <dev/sysmon/sysmonvar.h>
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#include <dev/sysmon/sysmon_taskq.h>
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static int beccbut_attached; /* there can be only one */
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struct beccbut_softc {
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struct device sc_dev;
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struct sysmon_pswitch sc_smpsw;
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void *sc_ih;
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};
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static void
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beccbut_pressed_event(void *arg)
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{
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struct beccbut_softc *sc = arg;
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sysmon_pswitch_event(&sc->sc_smpsw, PSWITCH_EVENT_PRESSED);
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}
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static int
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beccbut_intr(void *arg)
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{
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struct beccbut_softc *sc = arg;
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int rv;
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rv = sysmon_task_queue_sched(0, beccbut_pressed_event, sc);
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if (rv != 0)
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printf("%s: WARNING: unable to queue button pressed "
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"callback: %d\n", sc->sc_dev.dv_xname, rv);
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return (1);
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}
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static int
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beccbut_match(struct device *parent, struct cfdata *match, void *aux)
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{
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return (beccbut_attached == 0);
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}
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static void
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beccbut_attach(struct device *parent, struct device *self, void *aux)
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{
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struct beccbut_softc *sc = (void *) self;
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printf(": Reset button\n");
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beccbut_attached = 1;
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sysmon_task_queue_init();
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sc->sc_smpsw.smpsw_name = sc->sc_dev.dv_xname;
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sc->sc_smpsw.smpsw_type = PSWITCH_TYPE_RESET;
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if (sysmon_pswitch_register(&sc->sc_smpsw) != 0) {
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printf("%s: unable to register with sysmon\n",
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sc->sc_dev.dv_xname);
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return;
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}
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sc->sc_ih = becc_intr_establish(ICU_PUSHBUTTON, IPL_TTY,
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beccbut_intr, sc);
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if (sc->sc_ih == NULL)
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printf("%s: unable to establish interrupt handler\n",
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sc->sc_dev.dv_xname);
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}
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CFATTACH_DECL(beccbut, sizeof(struct beccbut_softc),
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beccbut_match, beccbut_attach, NULL, NULL);
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