1 /* $NetBSD: vchiq_kmod_netbsd.c,v 1.14 2024/11/07 09:51:00 rin Exp $ */ 2 3 /*- 4 * Copyright (c) 2013 The NetBSD Foundation, Inc. 5 * All rights reserved. 6 * 7 * This code is derived from software contributed to The NetBSD Foundation 8 * by Jared D. McNeill 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: vchiq_kmod_netbsd.c,v 1.14 2024/11/07 09:51:00 rin 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/bus.h> 40 #include <sys/sysctl.h> 41 42 #include <arm/broadcom/bcm2835reg.h> 43 #include <arm/broadcom/bcm2835_intr.h> 44 45 #include "vchiq_arm.h" 46 #include "vchiq_2835.h" 47 #include "vchiq_netbsd.h" 48 49 extern VCHIQ_STATE_T g_state; 50 51 static struct vchiq_softc *vchiq_softc = NULL; 52 53 #define VCHIQ_DOORBELL0 0x0 54 #define VCHIQ_DOORBELL1 0x4 55 #define VCHIQ_DOORBELL2 0x8 56 #define VCHIQ_DOORBELL3 0xC 57 58 void 59 vchiq_set_softc(struct vchiq_softc *sc) 60 { 61 vchiq_softc = sc; 62 } 63 64 int 65 vchiq_intr(void *priv) 66 { 67 struct vchiq_softc *sc = priv; 68 uint32_t status; 69 70 bus_space_barrier(sc->sc_iot, sc->sc_ioh, 71 VCHIQ_DOORBELL0, 4, BUS_SPACE_BARRIER_READ); 72 73 rmb(); 74 status = bus_space_read_4(sc->sc_iot, sc->sc_ioh, VCHIQ_DOORBELL0); 75 if (status & 0x4) { 76 remote_event_pollall(&g_state); 77 return 1; 78 } 79 80 return 0; 81 } 82 83 int 84 vchiq_print(void *aux, const char *pnp) 85 { 86 struct vchiq_attach_args *vaa = aux; 87 88 if (pnp) 89 aprint_normal("%s at %s", vaa->vaa_name, pnp); 90 91 return UNCONF; 92 } 93 94 void 95 remote_event_signal(REMOTE_EVENT_T *event) 96 { 97 wmb(); 98 99 event->fired = 1; 100 101 dsb(sy); /* data barrier operation */ 102 103 if (event->armed) { 104 bus_space_write_4(vchiq_softc->sc_iot, vchiq_softc->sc_ioh, 105 VCHIQ_DOORBELL2, 0); 106 bus_space_barrier(vchiq_softc->sc_iot, vchiq_softc->sc_ioh, 107 VCHIQ_DOORBELL2, 4, BUS_SPACE_BARRIER_WRITE); 108 } 109 } 110 111 SYSCTL_SETUP(sysctl_hw_vchiq_setup, "sysctl hw.vchiq setup") 112 { 113 const struct sysctlnode *rnode = NULL; 114 const struct sysctlnode *cnode = NULL; 115 116 sysctl_createv(clog, 0, NULL, &rnode, 117 CTLFLAG_PERMANENT, CTLTYPE_NODE, "vchiq", 118 NULL, NULL, 0, 119 NULL, 0, CTL_HW, CTL_CREATE, CTL_EOL); 120 121 sysctl_createv(clog, 0, &rnode, &cnode, 122 CTLFLAG_PERMANENT, CTLTYPE_NODE, "loglevel", 123 NULL, NULL, 0, 124 NULL, 0, CTL_CREATE, CTL_EOL); 125 126 sysctl_createv(clog, 0, &cnode, NULL, 127 CTLFLAG_PERMANENT|CTLFLAG_READWRITE, CTLTYPE_INT, "core", 128 SYSCTL_DESCR("VChiq Core Loglevel"), NULL, 0, 129 &vchiq_core_log_level, 0, CTL_CREATE, CTL_EOL); 130 131 sysctl_createv(clog, 0, &cnode, NULL, 132 CTLFLAG_PERMANENT|CTLFLAG_READWRITE, CTLTYPE_INT, "coremsg", 133 SYSCTL_DESCR("VChiq Core Message Loglevel"), NULL, 0, 134 &vchiq_core_msg_log_level, 0, CTL_CREATE, CTL_EOL); 135 136 sysctl_createv(clog, 0, &cnode, NULL, 137 CTLFLAG_PERMANENT|CTLFLAG_READWRITE, CTLTYPE_INT, "sync", 138 SYSCTL_DESCR("VChiq Sync Loglevel"), NULL, 0, 139 &vchiq_sync_log_level, 0, CTL_CREATE, CTL_EOL); 140 } 141