bcm2835_mbox.c revision 1.2.4.2
1 1.2.4.2 yamt /* $NetBSD: bcm2835_mbox.c,v 1.2.4.2 2012/10/30 17:18:59 yamt Exp $ */ 2 1.2.4.2 yamt 3 1.2.4.2 yamt /*- 4 1.2.4.2 yamt * Copyright (c) 2012 The NetBSD Foundation, Inc. 5 1.2.4.2 yamt * All rights reserved. 6 1.2.4.2 yamt * 7 1.2.4.2 yamt * This code is derived from software contributed to The NetBSD Foundation 8 1.2.4.2 yamt * by Nick Hudson 9 1.2.4.2 yamt * 10 1.2.4.2 yamt * Redistribution and use in source and binary forms, with or without 11 1.2.4.2 yamt * modification, are permitted provided that the following conditions 12 1.2.4.2 yamt * are met: 13 1.2.4.2 yamt * 1. Redistributions of source code must retain the above copyright 14 1.2.4.2 yamt * notice, this list of conditions and the following disclaimer. 15 1.2.4.2 yamt * 2. Redistributions in binary form must reproduce the above copyright 16 1.2.4.2 yamt * notice, this list of conditions and the following disclaimer in the 17 1.2.4.2 yamt * documentation and/or other materials provided with the distribution. 18 1.2.4.2 yamt * 19 1.2.4.2 yamt * THIS SOFTWARE IS PROVIDED BY THE NETBSD FOUNDATION, INC. AND CONTRIBUTORS 20 1.2.4.2 yamt * ``AS IS'' AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED 21 1.2.4.2 yamt * TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR 22 1.2.4.2 yamt * PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE FOUNDATION OR CONTRIBUTORS 23 1.2.4.2 yamt * BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR 24 1.2.4.2 yamt * CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF 25 1.2.4.2 yamt * SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS 26 1.2.4.2 yamt * INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN 27 1.2.4.2 yamt * CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) 28 1.2.4.2 yamt * ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE 29 1.2.4.2 yamt * POSSIBILITY OF SUCH DAMAGE. 30 1.2.4.2 yamt */ 31 1.2.4.2 yamt 32 1.2.4.2 yamt #include <sys/cdefs.h> 33 1.2.4.2 yamt __KERNEL_RCSID(0, "$NetBSD: bcm2835_mbox.c,v 1.2.4.2 2012/10/30 17:18:59 yamt Exp $"); 34 1.2.4.2 yamt 35 1.2.4.2 yamt #include <sys/param.h> 36 1.2.4.2 yamt #include <sys/systm.h> 37 1.2.4.2 yamt #include <sys/device.h> 38 1.2.4.2 yamt #include <sys/kernel.h> 39 1.2.4.2 yamt #include <sys/timetc.h> 40 1.2.4.2 yamt #include <sys/bus.h> 41 1.2.4.2 yamt 42 1.2.4.2 yamt #include <arm/broadcom/bcm_amba.h> 43 1.2.4.2 yamt #include <arm/broadcom/bcm2835_mbox.h> 44 1.2.4.2 yamt #include <arm/broadcom/bcm2835_mboxreg.h> 45 1.2.4.2 yamt #include <arm/broadcom/bcm2835reg.h> 46 1.2.4.2 yamt 47 1.2.4.2 yamt struct bcm2835mbox_softc { 48 1.2.4.2 yamt device_t sc_dev; 49 1.2.4.2 yamt 50 1.2.4.2 yamt bus_space_tag_t sc_iot; 51 1.2.4.2 yamt bus_space_handle_t sc_ioh; 52 1.2.4.2 yamt }; 53 1.2.4.2 yamt 54 1.2.4.2 yamt static struct bcm2835mbox_softc *bcm2835mbox_sc; 55 1.2.4.2 yamt 56 1.2.4.2 yamt static int bcmmbox_match(device_t, cfdata_t, void *); 57 1.2.4.2 yamt static void bcmmbox_attach(device_t, device_t, void *); 58 1.2.4.2 yamt 59 1.2.4.2 yamt CFATTACH_DECL_NEW(bcmmbox, sizeof(struct bcm2835mbox_softc), 60 1.2.4.2 yamt bcmmbox_match, bcmmbox_attach, NULL, NULL); 61 1.2.4.2 yamt 62 1.2.4.2 yamt /* ARGSUSED */ 63 1.2.4.2 yamt static int 64 1.2.4.2 yamt bcmmbox_match(device_t parent, cfdata_t match, void *aux) 65 1.2.4.2 yamt { 66 1.2.4.2 yamt struct amba_attach_args *aaa = aux; 67 1.2.4.2 yamt 68 1.2.4.2 yamt if (strcmp(aaa->aaa_name, "bcmmbox") != 0) 69 1.2.4.2 yamt return 0; 70 1.2.4.2 yamt 71 1.2.4.2 yamt return 1; 72 1.2.4.2 yamt } 73 1.2.4.2 yamt 74 1.2.4.2 yamt static void 75 1.2.4.2 yamt bcmmbox_attach(device_t parent, device_t self, void *aux) 76 1.2.4.2 yamt { 77 1.2.4.2 yamt struct bcm2835mbox_softc *sc = device_private(self); 78 1.2.4.2 yamt struct amba_attach_args *aaa = aux; 79 1.2.4.2 yamt 80 1.2.4.2 yamt aprint_naive("\n"); 81 1.2.4.2 yamt aprint_normal(": VC mailbox\n"); 82 1.2.4.2 yamt 83 1.2.4.2 yamt if (bcm2835mbox_sc == NULL) 84 1.2.4.2 yamt bcm2835mbox_sc = sc; 85 1.2.4.2 yamt 86 1.2.4.2 yamt sc->sc_dev = self; 87 1.2.4.2 yamt sc->sc_iot = aaa->aaa_iot; 88 1.2.4.2 yamt 89 1.2.4.2 yamt if (bus_space_map(aaa->aaa_iot, aaa->aaa_addr, BCM2835_MBOX_SIZE, 0, 90 1.2.4.2 yamt &sc->sc_ioh)) { 91 1.2.4.2 yamt aprint_error_dev(sc->sc_dev, "unable to map device\n"); 92 1.2.4.2 yamt return; 93 1.2.4.2 yamt } 94 1.2.4.2 yamt } 95 1.2.4.2 yamt 96 1.2.4.2 yamt void 97 1.2.4.2 yamt bcmmbox_read(uint8_t chan, uint32_t *data) 98 1.2.4.2 yamt { 99 1.2.4.2 yamt struct bcm2835mbox_softc *sc = bcm2835mbox_sc; 100 1.2.4.2 yamt 101 1.2.4.2 yamt KASSERT(sc != NULL); 102 1.2.4.2 yamt 103 1.2.4.2 yamt return bcm2835_mbox_read(sc->sc_iot, sc->sc_ioh, chan, data); 104 1.2.4.2 yamt } 105 1.2.4.2 yamt 106 1.2.4.2 yamt void 107 1.2.4.2 yamt bcmmbox_write(uint8_t chan, uint32_t data) 108 1.2.4.2 yamt { 109 1.2.4.2 yamt struct bcm2835mbox_softc *sc = bcm2835mbox_sc; 110 1.2.4.2 yamt 111 1.2.4.2 yamt KASSERT(sc != NULL); 112 1.2.4.2 yamt 113 1.2.4.2 yamt return bcm2835_mbox_write(sc->sc_iot, sc->sc_ioh, chan, data); 114 1.2.4.2 yamt } 115
Indexes created Mon Oct 20 16:09:52 GMT 2025