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joy_eap.c revision 1.5 
      1 /* $NetBSD: joy_eap.c,v 1.5 2006/10/12 01:31:31 christos Exp $ */
      2 
      3 #include <sys/param.h>
      4 #include <sys/systm.h>
      5 #include <sys/kernel.h>
      6 #include <sys/device.h>
      7 #include <sys/audioio.h>
      8 #include <dev/audio_if.h>
      9 #include <machine/bus.h>
     10 
     11 #include <dev/pci/eapreg.h>
     12 #include <dev/pci/eapvar.h>
     13 #include <dev/ic/joyvar.h>
     14 
     15 struct joy_eap_aa {
     16 	struct audio_attach_args aa_aaa;
     17 	bus_space_tag_t aa_iot;
     18 	bus_space_handle_t aa_ioh;
     19 };
     20 
     21 struct device *
     22 eap_joy_attach(struct device *eapdev, struct eap_gameport_args *gpa)
     23 {
     24 	int i;
     25 	bus_space_handle_t ioh;
     26 	u_int32_t icsc;
     27 	struct joy_eap_aa aa;
     28 	struct device *joydev;
     29 
     30 	/*
     31 	 * There are 4 possible locations. Just try to map one of them.
     32 	 * XXX This is questionable for 2 reasons:
     33 	 * - We don't know whether these addresses are usable on our
     34 	 *   PCI bus (might be a secondary one).
     35 	 * - PCI probing is early. ISA devices might conflict.
     36 	 */
     37 	for (i = 0; i < 4; i++) {
     38 		if (bus_space_map(gpa->gpa_iot, 0x200 + i * 8, 1,
     39 		    0, &ioh) == 0)
     40 			break;
     41 	}
     42 	if (i == 4)
     43 		return (0);
     44 
     45 	printf("%s: enabling gameport at legacy io port 0x%x\n",
     46 		eapdev->dv_xname, 0x200 + i * 8);
     47 
     48 	/* enable gameport on eap */
     49 	icsc = bus_space_read_4(gpa->gpa_iot, gpa->gpa_ioh, EAP_ICSC);
     50 	icsc &= ~E1371_JOY_ASELBITS;
     51 	icsc |= EAP_JYSTK_EN | E1371_JOY_ASEL(i);
     52 	bus_space_write_4(gpa->gpa_iot, gpa->gpa_ioh, EAP_ICSC, icsc);
     53 
     54 	aa.aa_aaa.type = AUDIODEV_TYPE_AUX;
     55 	aa.aa_iot = gpa->gpa_iot;
     56 	aa.aa_ioh = ioh;
     57 	joydev = config_found(eapdev, &aa, 0);
     58 	/* this cannot fail */
     59 	KASSERT(joydev != NULL);
     60 
     61 	return (joydev);
     62 }
     63 
     64 int
     65 eap_joy_detach(struct device *joydev, struct eap_gameport_args *gpa)
     66 {
     67 	int res;
     68 	struct joy_softc *sc = (struct joy_softc *)joydev;
     69 	u_int32_t icsc;
     70 
     71 	res = config_detach(joydev, 0);
     72 	if (res)
     73 		return (res);
     74 
     75 	/* disable gameport on eap */
     76 	icsc = bus_space_read_4(gpa->gpa_iot, gpa->gpa_ioh, EAP_ICSC);
     77 	icsc &= ~EAP_JYSTK_EN;
     78 	bus_space_write_4(gpa->gpa_iot, gpa->gpa_ioh, EAP_ICSC, icsc);
     79 
     80 	bus_space_unmap(sc->sc_iot, sc->sc_ioh, 1);
     81 	return (0);
     82 }
     83 
     84 static int
     85 joy_eap_match(struct device *parent __unused, struct cfdata *match __unused,
     86     void *aux)
     87 {
     88 	struct joy_eap_aa *eaa = aux;
     89 
     90 	if (eaa->aa_aaa.type != AUDIODEV_TYPE_AUX)
     91 		return (0);
     92 	return (1);
     93 }
     94 
     95 static void
     96 joy_eap_attach(struct device *parent __unused, struct device *self, void *aux)
     97 {
     98 	struct joy_softc *sc = (struct joy_softc *)self;
     99 	struct joy_eap_aa *eaa = aux;
    100 
    101 	printf("\n");
    102 
    103 	sc->sc_iot = eaa->aa_iot;
    104 	sc->sc_ioh = eaa->aa_ioh;
    105 
    106 	joyattach(sc);
    107 }
    108 
    109 static int
    110 joy_eap_detach(struct device *self, int flags)
    111 {
    112 
    113 	return (joydetach((struct joy_softc *)self, flags));
    114 }
    115 
    116 CFATTACH_DECL(joy_eap, sizeof (struct joy_softc),
    117 	joy_eap_match, joy_eap_attach, joy_eap_detach, NULL);
    118