1 /*- 2 * Copyright (c) 2013 Ruslan Bukin <br@bsdpad.com> 3 * All rights reserved. 4 * 5 * Redistribution and use in source and binary forms, with or without 6 * modification, are permitted provided that the following conditions 7 * are met: 8 * 1. Redistributions of source code must retain the above copyright 9 * notice, this list of conditions and the following disclaimer. 10 * 2. Redistributions in binary form must reproduce the above copyright 11 * notice, this list of conditions and the following disclaimer in the 12 * documentation and/or other materials provided with the distribution. 13 * 14 * THIS SOFTWARE IS PROVIDED BY THE AUTHOR AND CONTRIBUTORS ``AS IS'' AND 15 * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE 16 * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE 17 * ARE DISCLAIMED. IN NO EVENT SHALL THE AUTHOR OR CONTRIBUTORS BE LIABLE 18 * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL 19 * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS 20 * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) 21 * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT 22 * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY 23 * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF 24 * SUCH DAMAGE. 25 */ 26 27 /* 28 * Vybrid Family Miscellaneous System Control Module (MSCM) 29 * Chapter 66, Vybrid Reference Manual, Rev. 5, 07/2013 30 */ 31 32 #include <sys/cdefs.h> 33 __FBSDID("$FreeBSD$"); 34 35 #include <sys/param.h> 36 #include <sys/systm.h> 37 #include <sys/bus.h> 38 #include <sys/kernel.h> 39 #include <sys/module.h> 40 #include <sys/malloc.h> 41 #include <sys/rman.h> 42 #include <sys/timeet.h> 43 #include <sys/timetc.h> 44 #include <sys/watchdog.h> 45 46 #include <dev/ofw/openfirm.h> 47 #include <dev/ofw/ofw_bus.h> 48 #include <dev/ofw/ofw_bus_subr.h> 49 50 #include <machine/bus.h> 51 #include <machine/cpu.h> 52 #include <machine/intr.h> 53 54 #include <arm/freescale/vybrid/vf_common.h> 55 56 #define VF_NINT 112 /* Total number of interrupts */ 57 58 /* Int Router Shared Peripheral Routing Control */ 59 #define MSCM_IRSPRC(n) (0x880 + 2 * n) 60 61 struct mscm_softc { 62 struct resource *res[1]; 63 bus_space_tag_t bst; 64 bus_space_handle_t bsh; 65 }; 66 67 static struct resource_spec mscm_spec[] = { 68 { SYS_RES_MEMORY, 0, RF_ACTIVE }, 69 { -1, 0 } 70 }; 71 72 static int 73 mscm_probe(device_t dev) 74 { 75 76 if (!ofw_bus_status_okay(dev)) 77 return (ENXIO); 78 79 if (!ofw_bus_is_compatible(dev, "fsl,mvf600-mscm")) 80 return (ENXIO); 81 82 device_set_desc(dev, "Vybrid Family Miscellaneous System Control Module"); 83 return (BUS_PROBE_DEFAULT); 84 } 85 86 static int 87 mscm_attach(device_t dev) 88 { 89 struct mscm_softc *sc; 90 int i; 91 92 sc = device_get_softc(dev); 93 94 if (bus_alloc_resources(dev, mscm_spec, sc->res)) { 95 device_printf(dev, "could not allocate resources\n"); 96 return (ENXIO); 97 } 98 99 /* Memory interface */ 100 sc->bst = rman_get_bustag(sc->res[0]); 101 sc->bsh = rman_get_bushandle(sc->res[0]); 102 103 /* Route all the interrupts to CP0 */ 104 for (i = 0; i < VF_NINT; i++) 105 WRITE2(sc, MSCM_IRSPRC(i), 1); 106 107 return (0); 108 } 109 110 static device_method_t mscm_methods[] = { 111 DEVMETHOD(device_probe, mscm_probe), 112 DEVMETHOD(device_attach, mscm_attach), 113 { 0, 0 } 114 }; 115 116 static driver_t mscm_driver = { 117 "mscm", 118 mscm_methods, 119 sizeof(struct mscm_softc), 120 }; 121 122 static devclass_t mscm_devclass; 123 124 DRIVER_MODULE(mscm, simplebus, mscm_driver, mscm_devclass, 0, 0); 125