1 /* $NetBSD: bcm2835_mbox.h,v 1.6 2019/12/30 18:43:38 jmcneill 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 #ifndef _BCM2835_MBOX_H_ 33 #define _BCM2835_MBOX_H_ 34 35 #include <sys/bus.h> 36 37 #define BCM2835_MBOX_NUMCHANNELS 16 38 #define BCM2835_MBOX_CHANMASK 0xf 39 40 #define BCM2835_MBOX_CHAN(chan) ((chan) & BCM2835_MBOX_CHANMASK) 41 #define BCM2835_MBOX_DATA(data) ((data) & ~BCM2835_MBOX_CHANMASK) 42 43 #define BCM2835_MBOX_MSG(chan, data) \ 44 (BCM2835_MBOX_CHAN(chan) | BCM2835_MBOX_DATA(data)) 45 46 struct bcm2835mbox_softc { 47 device_t sc_dev; 48 device_t sc_platdev; 49 50 bus_space_tag_t sc_iot; 51 bus_space_handle_t sc_ioh; 52 bus_dma_tag_t sc_dmat; 53 void *sc_intrh; 54 55 kmutex_t sc_lock; 56 kmutex_t sc_intr_lock; 57 kcondvar_t sc_chan[BCM2835_MBOX_NUMCHANNELS]; 58 uint32_t sc_mbox[BCM2835_MBOX_NUMCHANNELS]; 59 }; 60 61 void bcm2835_mbox_read(bus_space_tag_t, bus_space_handle_t, uint8_t, 62 uint32_t *); 63 void bcm2835_mbox_write(bus_space_tag_t, bus_space_handle_t, uint8_t, 64 uint32_t); 65 66 void bcmmbox_attach(struct bcm2835mbox_softc *); 67 int bcmmbox_intr(void *); 68 void bcmmbox_read(uint8_t, uint32_t *); 69 void bcmmbox_write(uint8_t, uint32_t); 70 71 int bcmmbox_request(uint8_t, void *, size_t, uint32_t *); 72 73 struct bcmmbox_attach_args { 74 bus_dma_tag_t baa_dmat; 75 }; 76 77 #endif /* _BCM2835_MBOX_H_ */ 78