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attimer.c revision 1.7.4.2
      1  1.7.4.2      yamt /*	$NetBSD: attimer.c,v 1.7.4.2 2009/05/04 08:12:40 yamt 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      1.1      cube  *
     16      1.1      cube  *  THIS SOFTWARE IS PROVIDED BY THE NETBSD FOUNDATION, INC. AND CONTRIBUTORS
     17      1.1      cube  *  ``AS IS'' AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED
     18      1.1      cube  *  TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR
     19      1.1      cube  *  PURPOSE ARE DISCLAIMED.  IN NO EVENT SHALL THE FOUNDATION OR CONTRIBUTORS
     20      1.1      cube  *  BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR
     21      1.1      cube  *  CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF
     22      1.1      cube  *  SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS
     23      1.1      cube  *  INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN
     24      1.1      cube  *  CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE)
     25      1.1      cube  *  ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE
     26      1.1      cube  *  POSSIBILITY OF SUCH DAMAGE.
     27      1.1      cube  */
     28      1.1      cube 
     29      1.1      cube /*
     30      1.1      cube  * AT Timer
     31      1.1      cube  *
     32      1.1      cube  * This code only allows control over the pitch of the speaker (pcppi(4)).
     33      1.1      cube  */
     34      1.1      cube 
     35      1.1      cube #include <sys/cdefs.h>
     36  1.7.4.2      yamt __KERNEL_RCSID(0, "$NetBSD: attimer.c,v 1.7.4.2 2009/05/04 08:12:40 yamt Exp $");
     37      1.1      cube 
     38      1.1      cube #include <sys/param.h>
     39      1.1      cube #include <sys/systm.h>
     40      1.1      cube #include <sys/kernel.h>
     41      1.1      cube #include <sys/device.h>
     42      1.1      cube 
     43      1.4        ad #include <sys/bus.h>
     44      1.1      cube 
     45      1.1      cube #include <dev/isa/isareg.h>
     46      1.1      cube 
     47      1.1      cube #include <dev/ic/attimervar.h>
     48      1.1      cube #include <dev/ic/i8253reg.h>
     49      1.1      cube 
     50      1.1      cube extern struct cfdriver attimer_cd;
     51      1.1      cube 
     52      1.1      cube void
     53      1.1      cube attimer_attach(struct attimer_softc *sc)
     54      1.1      cube {
     55      1.1      cube 	sc->sc_flags |= ATT_CONFIGURED;
     56      1.5  jmcneill 
     57      1.7      cube 	if (!pmf_device_register(sc->sc_dev, NULL, NULL))
     58      1.7      cube 		aprint_error_dev(sc->sc_dev, "couldn't establish power handler\n");
     59      1.1      cube }
     60      1.1      cube 
     61      1.6    dyoung int
     62      1.6    dyoung attimer_detach(device_t self, int flags)
     63      1.6    dyoung {
     64      1.6    dyoung 	struct attimer_softc *sc = device_private(self);
     65  1.7.4.2      yamt 
     66  1.7.4.2      yamt 	if ((sc->sc_flags & ATT_ATTACHED) != 0)
     67  1.7.4.2      yamt 		return EBUSY;
     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      1.7      cube device_t
     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  1.7.4.2      yamt 		sc = device_lookup_private(&attimer_cd, i);
     92  1.7.4.2      yamt 		if (sc == NULL)
     93      1.6    dyoung 			continue;
     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      1.7      cube 			return sc->sc_dev;
     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  1.7.4.2      yamt attimer_detach_speaker(device_t dev)
    105  1.7.4.2      yamt {
    106  1.7.4.2      yamt 	struct attimer_softc *sc = device_private(dev);
    107  1.7.4.2      yamt 
    108  1.7.4.2      yamt 	sc->sc_flags &= ~ATT_ATTACHED;
    109  1.7.4.2      yamt }
    110  1.7.4.2      yamt 
    111  1.7.4.2      yamt void
    112      1.7      cube attimer_set_pitch(device_t dev, int pitch)
    113      1.1      cube {
    114      1.7      cube 	struct attimer_softc *sc = device_private(dev);
    115      1.1      cube 	int s;
    116      1.7      cube 
    117      1.1      cube 	s = splhigh();
    118      1.1      cube 	bus_space_write_1(sc->sc_iot, sc->sc_ioh, TIMER_MODE,
    119      1.1      cube 	    TIMER_SEL2 | TIMER_16BIT | TIMER_SQWAVE);
    120      1.1      cube 	bus_space_write_1(sc->sc_iot, sc->sc_ioh, TIMER_CNTR2,
    121      1.1      cube 	    TIMER_DIV(pitch) % 256);
    122      1.1      cube 	bus_space_write_1(sc->sc_iot, sc->sc_ioh, TIMER_CNTR2,
    123      1.1      cube 	    TIMER_DIV(pitch) / 256);
    124      1.1      cube 	splx(s);
    125      1.1      cube }
    126