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      1 /* $NetBSD: aaci_fdt.c,v 1.3 2021/01/27 03:10:19 thorpej Exp $ */
      2 
      3 /*-
      4  * Copyright (c) 2017 Jared McNeill <jmcneill (at) invisible.ca>
      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: aaci_fdt.c,v 1.3 2021/01/27 03:10:19 thorpej Exp $");
     31 
     32 #include <sys/param.h>
     33 #include <sys/bus.h>
     34 #include <sys/device.h>
     35 #include <sys/systm.h>
     36 #include <sys/kernel.h>
     37 
     38 #include <dev/fdt/fdtvar.h>
     39 
     40 #include <dev/ic/pl041var.h>
     41 
     42 static int	aaci_fdt_match(device_t, cfdata_t, void *);
     43 static void	aaci_fdt_attach(device_t, device_t, void *);
     44 
     45 static const struct device_compatible_entry compat_data[] = {
     46 	{ .compat = "arm,pl041" },
     47 	DEVICE_COMPAT_EOL
     48 };
     49 
     50 CFATTACH_DECL_NEW(aaci_fdt, sizeof(struct aaci_softc),
     51 	aaci_fdt_match, aaci_fdt_attach, NULL, NULL);
     52 
     53 static int
     54 aaci_fdt_match(device_t parent, cfdata_t cf, void *aux)
     55 {
     56 	struct fdt_attach_args * const faa = aux;
     57 
     58 	return of_compatible_match(faa->faa_phandle, compat_data);
     59 }
     60 
     61 static void
     62 aaci_fdt_attach(device_t parent, device_t self, void *aux)
     63 {
     64 	struct aaci_softc * const sc = device_private(self);
     65 	struct fdt_attach_args * const faa = aux;
     66 	const int phandle = faa->faa_phandle;
     67 	char intrstr[128];
     68 	struct clk *clk;
     69 	bus_addr_t addr;
     70 	bus_size_t size;
     71 	void *ih;
     72 
     73 	if (fdtbus_get_reg(phandle, 0, &addr, &size) != 0) {
     74 		aprint_error(": missing 'reg' property\n");
     75 		return;
     76 	}
     77 
     78 	if (!fdtbus_intr_str(phandle, 0, intrstr, sizeof(intrstr))) {
     79 		aprint_error_dev(self, "failed to decode interrupt\n");
     80 		return;
     81 	}
     82 
     83 	for (int i = 0; (clk = fdtbus_clock_get_index(phandle, i)); i++)
     84 		if (clk_enable(clk) != 0) {
     85 			aprint_error(": couldn't enable clock #%d\n", i);
     86 			return;
     87 		}
     88 
     89 	sc->sc_dev = self;
     90 	sc->sc_bst = faa->faa_bst;
     91 	if (bus_space_map(faa->faa_bst, addr, size, 0, &sc->sc_bsh)) {
     92 		aprint_error(": couldn't map device\n");
     93 		return;
     94 	}
     95 
     96 	ih = fdtbus_intr_establish_xname(phandle, 0, IPL_AUDIO, FDT_INTR_MPSAFE,
     97 	    aaci_intr, sc, device_xname(self));
     98 	if (ih == NULL) {
     99 		aprint_error_dev(self, "couldn't install interrupt handler\n");
    100 		return;
    101 	}
    102 
    103 	aaci_attach(sc);
    104 
    105 	aprint_normal_dev(self, "interrupting on %s\n", intrstr);
    106 }
    107