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      1 /* $NetBSD: ti_omapwugen.c,v 1.1 2025/12/16 12:20:22 skrll Exp $ */
      2 
      3 /*-
      4  * Copyright (c) 2025 Rui-Xiang Guo
      5  * All rights reserved.
      6  *
      7  * Redistribution and use in source and binary forms, with or without
      8  * modification, are permitted provided that the following conditions
      9  * are met:
     10  * 1. Redistributions of source code must retain the above copyright
     11  *    notice, this list of conditions and the following disclaimer.
     12  * 2. Redistributions in binary form must reproduce the above copyright
     13  *    notice, this list of conditions and the following disclaimer in the
     14  *    documentation and/or other materials provided with the distribution.
     15  *
     16  * THIS SOFTWARE IS PROVIDED BY THE AUTHOR ``AS IS'' AND ANY EXPRESS OR
     17  * IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED WARRANTIES
     18  * OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE DISCLAIMED.
     19  * IN NO EVENT SHALL THE AUTHOR BE LIABLE FOR ANY DIRECT, INDIRECT,
     20  * INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING,
     21  * BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES;
     22  * LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED
     23  * AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY,
     24  * OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
     25  * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
     26  * SUCH DAMAGE.
     27  */
     28 
     29 #include <sys/cdefs.h>
     30 __KERNEL_RCSID(0, "$NetBSD: ti_omapwugen.c,v 1.1 2025/12/16 12:20:22 skrll Exp $");
     31 
     32 #include <sys/param.h>
     33 #include <sys/bus.h>
     34 #include <sys/device.h>
     35 #include <sys/intr.h>
     36 #include <sys/systm.h>
     37 #include <sys/kernel.h>
     38 
     39 #include <dev/fdt/fdtvar.h>
     40 
     41 static int omapwugen_match(device_t, cfdata_t, void *);
     42 static void omapwugen_attach(device_t, device_t, void *);
     43 
     44 static const struct device_compatible_entry compat_data[] = {
     45 	{ .compat = "ti,omap4-wugen-mpu" },
     46 	DEVICE_COMPAT_EOL
     47 };
     48 
     49 struct omapwugen_softc {
     50 	device_t sc_dev;
     51 	int sc_phandle;
     52 };
     53 
     54 static void *
     55 omapwugen_fdt_establish(device_t dev, u_int *specifier, int ipl, int flags,
     56     int (*func)(void *), void *arg, const char *xname)
     57 {
     58 	struct omapwugen_softc * const sc = device_private(dev);
     59 
     60 	const int ihandle = fdtbus_intr_parent(sc->sc_phandle);
     61 	if (ihandle == -1) {
     62 		return NULL;
     63 	}
     64 
     65 	return fdtbus_intr_establish_raw(ihandle, specifier, ipl,
     66 	    flags, func, arg, xname);
     67 }
     68 
     69 static void
     70 omapwugen_fdt_disestablish(device_t dev, void *ih)
     71 {
     72 	intr_disestablish(ih);
     73 }
     74 
     75 static bool
     76 omapwugen_fdt_intrstr(device_t dev, u_int *specifier, char *buf, size_t buflen)
     77 {
     78 	struct omapwugen_softc * const sc = device_private(dev);
     79 
     80 	const int ihandle = fdtbus_intr_parent(sc->sc_phandle);
     81 	if (ihandle == -1) {
     82 		return false;
     83 	}
     84 
     85 	return fdtbus_intr_str_raw(ihandle, specifier, buf, buflen);
     86 }
     87 
     88 static const struct fdtbus_interrupt_controller_func omapwugen_fdt_funcs = {
     89 	.establish = omapwugen_fdt_establish,
     90 	.disestablish = omapwugen_fdt_disestablish,
     91 	.intrstr = omapwugen_fdt_intrstr,
     92 };
     93 
     94 static int
     95 omapwugen_match(device_t parent, cfdata_t cf, void *aux)
     96 {
     97 	struct fdt_attach_args * const faa = aux;
     98 
     99 	return of_compatible_match(faa->faa_phandle, compat_data);
    100 }
    101 
    102 static void
    103 omapwugen_attach(device_t parent, device_t self, void *aux)
    104 {
    105 	struct omapwugen_softc * const sc = device_private(self);
    106 	struct fdt_attach_args * const faa = aux;
    107 	const int phandle = faa->faa_phandle;
    108 	int error;
    109 
    110 	sc->sc_dev = self;
    111 	sc->sc_phandle = phandle;
    112 
    113 	aprint_naive("\n");
    114 	aprint_normal("\n");
    115 
    116 	error = fdtbus_register_interrupt_controller(self, phandle,
    117 	    &omapwugen_fdt_funcs);
    118 	if (error) {
    119 		aprint_error_dev(self, "couldn't register with fdtbus: %d\n",
    120 		    error);
    121 		return;
    122 	}
    123 }
    124 
    125 CFATTACH_DECL_NEW(omapwugen, sizeof(struct omapwugen_softc),
    126 	omapwugen_match, omapwugen_attach, NULL, NULL);
    127