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      1 /* $NetBSD: joy_eap.c,v 1.17 2021/08/07 16:19:14 thorpej Exp $ */
      2 
      3 #include <sys/cdefs.h>
      4 __KERNEL_RCSID(0, "$NetBSD: joy_eap.c,v 1.17 2021/08/07 16:19:14 thorpej Exp $");
      5 
      6 #include <sys/param.h>
      7 #include <sys/systm.h>
      8 #include <sys/kernel.h>
      9 #include <sys/device.h>
     10 #include <sys/audioio.h>
     11 #include <sys/bus.h>
     12 
     13 #include <dev/audio/audio_if.h>
     14 
     15 #include <dev/pci/eapreg.h>
     16 #include <dev/pci/eapvar.h>
     17 
     18 #include <dev/ic/joyvar.h>
     19 
     20 struct joy_eap_aa {
     21 	struct audio_attach_args aa_aaa;
     22 	bus_space_tag_t aa_iot;
     23 	bus_space_handle_t aa_ioh;
     24 };
     25 
     26 device_t
     27 eap_joy_attach(device_t eapdev, struct eap_gameport_args *gpa)
     28 {
     29 	int i;
     30 	bus_space_handle_t ioh;
     31 	u_int32_t icsc;
     32 	struct joy_eap_aa aa;
     33 	device_t joydev;
     34 
     35 	/*
     36 	 * There are 4 possible locations. Just try to map one of them.
     37 	 * XXX This is questionable for 2 reasons:
     38 	 * - We don't know whether these addresses are usable on our
     39 	 *   PCI bus (might be a secondary one).
     40 	 * - PCI probing is early. ISA devices might conflict.
     41 	 */
     42 	for (i = 0; i < 4; i++) {
     43 		if (bus_space_map(gpa->gpa_iot, 0x200 + i * 8, 1,
     44 		    0, &ioh) == 0)
     45 			break;
     46 	}
     47 	if (i == 4)
     48 		return 0;
     49 
     50 	printf("%s: enabling gameport at legacy io port 0x%x\n",
     51 		device_xname(eapdev), 0x200 + i * 8);
     52 
     53 	/* enable gameport on eap */
     54 	icsc = bus_space_read_4(gpa->gpa_iot, gpa->gpa_ioh, EAP_ICSC);
     55 	icsc &= ~E1371_JOY_ASELBITS;
     56 	icsc |= EAP_JYSTK_EN | E1371_JOY_ASEL(i);
     57 	bus_space_write_4(gpa->gpa_iot, gpa->gpa_ioh, EAP_ICSC, icsc);
     58 
     59 	aa.aa_aaa.type = AUDIODEV_TYPE_AUX;
     60 	aa.aa_iot = gpa->gpa_iot;
     61 	aa.aa_ioh = ioh;
     62 	joydev = config_found(eapdev, &aa, 0,
     63 	    CFARGS(.iattr = "eap"));
     64 	/* this cannot fail */
     65 	KASSERT(joydev != NULL);
     66 
     67 	return joydev;
     68 }
     69 
     70 int
     71 eap_joy_detach(device_t joydev, struct eap_gameport_args *gpa)
     72 {
     73 	int res;
     74 	struct joy_softc *sc = device_private(joydev);
     75 	u_int32_t icsc;
     76 
     77 	res = config_detach(joydev, 0);
     78 	if (res)
     79 		return res;
     80 
     81 	/* disable gameport on eap */
     82 	icsc = bus_space_read_4(gpa->gpa_iot, gpa->gpa_ioh, EAP_ICSC);
     83 	icsc &= ~EAP_JYSTK_EN;
     84 	bus_space_write_4(gpa->gpa_iot, gpa->gpa_ioh, EAP_ICSC, icsc);
     85 
     86 	bus_space_unmap(sc->sc_iot, sc->sc_ioh, 1);
     87 	return 0;
     88 }
     89 
     90 static int
     91 joy_eap_match(device_t parent, cfdata_t match, void *aux)
     92 {
     93 	struct joy_eap_aa *eaa = aux;
     94 
     95 	if (eaa->aa_aaa.type != AUDIODEV_TYPE_AUX)
     96 		return 0;
     97 	return 1;
     98 }
     99 
    100 static void
    101 joy_eap_attach(device_t parent, device_t self, void *aux)
    102 {
    103 	struct joy_softc *sc = device_private(self);
    104 	struct eap_softc *esc = device_private(parent);
    105 	struct joy_eap_aa *eaa = aux;
    106 
    107 	aprint_normal("\n");
    108 
    109 	sc->sc_iot = eaa->aa_iot;
    110 	sc->sc_ioh = eaa->aa_ioh;
    111 	sc->sc_dev = self;
    112 	sc->sc_lock = &esc->sc_lock;
    113 
    114 	joyattach(sc);
    115 }
    116 
    117 static int
    118 joy_eap_detach(device_t self, int flags)
    119 {
    120 
    121 	return joydetach(device_private(self), flags);
    122 }
    123 
    124 CFATTACH_DECL_NEW(joy_eap, sizeof (struct joy_softc),
    125 	joy_eap_match, joy_eap_attach, joy_eap_detach, NULL);
    126