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attimer.c revision 1.6 
      1  1.6    dyoung /*	$NetBSD: attimer.c,v 1.6 2008/01/03 01:21:44 dyoung Exp $	*/
      2  1.1      cube 
      3  1.1      cube /*
      4  1.1      cube  *  Copyright (c) 2005 The NetBSD Foundation.
      5  1.1      cube  *  All rights reserved.
      6  1.1      cube  *
      7  1.1      cube  *  Redistribution and use in source and binary forms, with or without
      8  1.1      cube  *  modification, are permitted provided that the following conditions
      9  1.1      cube  *  are met:
     10  1.1      cube  *  1. Redistributions of source code must retain the above copyright
     11  1.1      cube  *     notice, this list of conditions and the following disclaimer.
     12  1.1      cube  *  2. Redistributions in binary form must reproduce the above copyright
     13  1.1      cube  *     notice, this list of conditions and the following disclaimer in the
     14  1.1      cube  *     documentation and/or other materials provided with the distribution.
     15  1.3      cube  *  3. Neither the name of The NetBSD Foundation nor the names of its
     16  1.1      cube  *     contributors may be used to endorse or promote products derived
     17  1.1      cube  *     from this software without specific prior written permission.
     18  1.1      cube  *
     19  1.1      cube  *  THIS SOFTWARE IS PROVIDED BY THE NETBSD FOUNDATION, INC. AND CONTRIBUTORS
     20  1.1      cube  *  ``AS IS'' AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED
     21  1.1      cube  *  TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR
     22  1.1      cube  *  PURPOSE ARE DISCLAIMED.  IN NO EVENT SHALL THE FOUNDATION OR CONTRIBUTORS
     23  1.1      cube  *  BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR
     24  1.1      cube  *  CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF
     25  1.1      cube  *  SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS
     26  1.1      cube  *  INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN
     27  1.1      cube  *  CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE)
     28  1.1      cube  *  ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE
     29  1.1      cube  *  POSSIBILITY OF SUCH DAMAGE.
     30  1.1      cube  */
     31  1.1      cube 
     32  1.1      cube /*
     33  1.1      cube  * AT Timer
     34  1.1      cube  *
     35  1.1      cube  * This code only allows control over the pitch of the speaker (pcppi(4)).
     36  1.1      cube  */
     37  1.1      cube 
     38  1.1      cube #include <sys/cdefs.h>
     39  1.6    dyoung __KERNEL_RCSID(0, "$NetBSD: attimer.c,v 1.6 2008/01/03 01:21:44 dyoung Exp $");
     40  1.1      cube 
     41  1.1      cube #include <sys/param.h>
     42  1.1      cube #include <sys/systm.h>
     43  1.1      cube #include <sys/kernel.h>
     44  1.1      cube #include <sys/device.h>
     45  1.1      cube 
     46  1.4        ad #include <sys/bus.h>
     47  1.1      cube 
     48  1.1      cube #include <dev/isa/isareg.h>
     49  1.1      cube 
     50  1.1      cube #include <dev/ic/attimervar.h>
     51  1.1      cube #include <dev/ic/i8253reg.h>
     52  1.1      cube 
     53  1.1      cube extern struct cfdriver attimer_cd;
     54  1.1      cube 
     55  1.1      cube void
     56  1.1      cube attimer_attach(struct attimer_softc *sc)
     57  1.1      cube {
     58  1.1      cube 	sc->sc_flags |= ATT_CONFIGURED;
     59  1.5  jmcneill 
     60  1.5  jmcneill 	if (!pmf_device_register(&sc->sc_dev, NULL, NULL))
     61  1.5  jmcneill 		aprint_error_dev(&sc->sc_dev, "couldn't establish power handler\n");
     62  1.1      cube }
     63  1.1      cube 
     64  1.6    dyoung int
     65  1.6    dyoung attimer_detach(device_t self, int flags)
     66  1.6    dyoung {
     67  1.6    dyoung 	struct attimer_softc *sc = device_private(self);
     68  1.6    dyoung 
     69  1.6    dyoung 	pmf_device_deregister(self);
     70  1.6    dyoung 	sc->sc_flags &= ~ATT_CONFIGURED;
     71  1.6    dyoung 	bus_space_unmap(sc->sc_iot, sc->sc_ioh, sc->sc_size);
     72  1.6    dyoung 	return 0;
     73  1.6    dyoung }
     74  1.6    dyoung 
     75  1.1      cube /*
     76  1.1      cube  * This is slightly artificial.  While the code looks fine, I can't help
     77  1.1      cube  * but pray I'll get the attimer object associated to the pcppi object
     78  1.1      cube  * that calls the routine.
     79  1.1      cube  *
     80  1.1      cube  * There's not much at risk here, as there's about no chance to have a
     81  1.1      cube  * computer with more than one pcppi/attimer accessible.
     82  1.1      cube  */
     83  1.1      cube 
     84  1.1      cube struct attimer_softc *
     85  1.6    dyoung attimer_attach_speaker(void)
     86  1.1      cube {
     87  1.1      cube 	int i;
     88  1.1      cube 	struct attimer_softc *sc;
     89  1.1      cube 
     90  1.6    dyoung 	for (i = 0; i < attimer_cd.cd_ndevs; i++) {
     91  1.6    dyoung 		if (attimer_cd.cd_devs[i] == NULL)
     92  1.6    dyoung 			continue;
     93  1.6    dyoung 		sc = (struct attimer_softc *)attimer_cd.cd_devs[i];
     94  1.6    dyoung 		if ((sc->sc_flags & ATT_CONFIGURED) &&
     95  1.6    dyoung 		    !(sc->sc_flags & ATT_ATTACHED)) {
     96  1.6    dyoung 			sc->sc_flags |= ATT_ATTACHED;
     97  1.6    dyoung 			return sc;
     98  1.1      cube 		}
     99  1.6    dyoung 	}
    100  1.1      cube 	return NULL;
    101  1.1      cube }
    102  1.1      cube 
    103  1.1      cube void
    104  1.1      cube attimer_set_pitch(struct attimer_softc *sc, int pitch)
    105  1.1      cube {
    106  1.1      cube 	int s;
    107  1.1      cube 	s = splhigh();
    108  1.1      cube 	bus_space_write_1(sc->sc_iot, sc->sc_ioh, TIMER_MODE,
    109  1.1      cube 	    TIMER_SEL2 | TIMER_16BIT | TIMER_SQWAVE);
    110  1.1      cube 	bus_space_write_1(sc->sc_iot, sc->sc_ioh, TIMER_CNTR2,
    111  1.1      cube 	    TIMER_DIV(pitch) % 256);
    112  1.1      cube 	bus_space_write_1(sc->sc_iot, sc->sc_ioh, TIMER_CNTR2,
    113  1.1      cube 	    TIMER_DIV(pitch) / 256);
    114  1.1      cube 	splx(s);
    115  1.1      cube }
    116