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attimer.c revision 1.10 
      1  1.10    dyoung /*	$NetBSD: attimer.c,v 1.10 2009/04/07 22:30:09 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   1.1      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  1.10    dyoung __KERNEL_RCSID(0, "$NetBSD: attimer.c,v 1.10 2009/04/07 22:30:09 dyoung 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  1.10    dyoung 
     66  1.10    dyoung 	if ((sc->sc_flags & ATT_ATTACHED) != 0)
     67  1.10    dyoung 		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   1.9    cegger 		sc = device_lookup_private(&attimer_cd, i);
     92   1.9    cegger 		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  1.10    dyoung attimer_detach_speaker(device_t dev)
    105  1.10    dyoung {
    106  1.10    dyoung 	struct attimer_softc *sc = device_private(dev);
    107  1.10    dyoung 
    108  1.10    dyoung 	sc->sc_flags &= ~ATT_ATTACHED;
    109  1.10    dyoung }
    110  1.10    dyoung 
    111  1.10    dyoung 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