1/* $NetBSD: bcm2835_mbox_fdt.c,v 1.3 2021/01/29 14:11:14 skrll Exp $ */ 2 3/*- 4 * Copyright (c) 2012 The NetBSD Foundation, Inc. 5 * All rights reserved. 6 * 7 * This code is derived from software contributed to The NetBSD Foundation 8 * by Nick Hudson 9 * 10 * Redistribution and use in source and binary forms, with or without 11 * modification, are permitted provided that the following conditions 12 * are met: 13 * 1. Redistributions of source code must retain the above copyright 14 * notice, this list of conditions and the following disclaimer. 15 * 2. Redistributions in binary form must reproduce the above copyright 16 * notice, this list of conditions and the following disclaimer in the 17 * documentation and/or other materials provided with the distribution. 18 * 19 * THIS SOFTWARE IS PROVIDED BY THE NETBSD FOUNDATION, INC. AND CONTRIBUTORS 20 * ``AS IS'' AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED 21 * TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR 22 * PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE FOUNDATION OR CONTRIBUTORS 23 * BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR 24 * CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF 25 * SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS 26 * INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN 27 * CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) 28 * ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE 29 * POSSIBILITY OF SUCH DAMAGE. 30 */ 31 32#include <sys/cdefs.h> 33__KERNEL_RCSID(0, "$NetBSD: bcm2835_mbox_fdt.c,v 1.3 2021/01/29 14:11:14 skrll Exp $"); 34 35#include <sys/param.h> 36#include <sys/systm.h> 37#include <sys/device.h> 38#include <sys/kernel.h> 39#include <sys/timetc.h> 40#include <sys/bus.h> 41#include <sys/mutex.h> 42 43#include <arm/broadcom/bcm2835_mbox.h> 44#include <arm/broadcom/bcm2835_mboxreg.h> 45#include <arm/broadcom/bcm2835reg.h> 46#include <arm/broadcom/bcm2835var.h> 47 48#include <dev/fdt/fdtvar.h> 49 50static int bcmmbox_fdt_match(device_t, cfdata_t, void *); 51static void bcmmbox_fdt_attach(device_t, device_t, void *); 52 53CFATTACH_DECL_NEW(bcmmbox_fdt, sizeof(struct bcm2835mbox_softc), 54 bcmmbox_fdt_match, bcmmbox_fdt_attach, NULL, NULL); 55 56static const struct device_compatible_entry compat_data[] = { 57 { .compat = "brcm,bcm2835-mbox" }, 58 DEVICE_COMPAT_EOL 59}; 60 61/* ARGSUSED */ 62static int 63bcmmbox_fdt_match(device_t parent, cfdata_t match, void *aux) 64{ 65 struct fdt_attach_args * const faa = aux; 66 67 return of_compatible_match(faa->faa_phandle, compat_data); 68} 69 70static void 71bcmmbox_fdt_attach(device_t parent, device_t self, void *aux) 72{ 73 struct bcm2835mbox_softc *sc = device_private(self); 74 struct fdt_attach_args * const faa = aux; 75 const int phandle = faa->faa_phandle; 76 char intrstr[128]; 77 bus_addr_t addr; 78 bus_size_t size; 79 80 sc->sc_dev = self; 81 sc->sc_iot = faa->faa_bst; 82 sc->sc_dmat = faa->faa_dmat; 83 84 if (fdtbus_get_reg(phandle, 0, &addr, &size) != 0) { 85 aprint_error(": couldn't get register address\n"); 86 return; 87 } 88 89 if (bus_space_map(faa->faa_bst, addr, size, 0, &sc->sc_ioh) != 0) { 90 aprint_error_dev(sc->sc_dev, "unable to map device\n"); 91 return; 92 } 93 94 if (!fdtbus_intr_str(phandle, 0, intrstr, sizeof(intrstr))) { 95 aprint_error(": failed to decode interrupt\n"); 96 return; 97 } 98 99 aprint_naive("\n"); 100 aprint_normal(": VC mailbox\n"); 101 102 sc->sc_intrh = fdtbus_intr_establish_xname(phandle, 0, IPL_VM, 0, 103 bcmmbox_intr, sc, device_xname(self)); 104 if (sc->sc_intrh == NULL) { 105 aprint_error_dev(self, "failed to establish interrupt %s\n", 106 intrstr); 107 return; 108 } 109 aprint_normal_dev(self, "interrupting on %s\n", intrstr); 110 111 bcmmbox_attach(sc); 112} 113