vf_mscm.c revision 258057
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: head/sys/arm/freescale/vybrid/vf_mscm.c 258057 2013-11-12 18:02:56Z br $"); 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/fdt/fdt_common.h> 47#include <dev/ofw/openfirm.h> 48#include <dev/ofw/ofw_bus.h> 49#include <dev/ofw/ofw_bus_subr.h> 50 51#include <machine/bus.h> 52#include <machine/fdt.h> 53#include <machine/cpu.h> 54#include <machine/intr.h> 55 56#include <arm/freescale/vybrid/vf_common.h> 57 58#define VF_NINT 112 /* Total number of interrupts */ 59 60/* Int Router Shared Peripheral Routing Control */ 61#define MSCM_IRSPRC(n) (0x880 + 2 * n) 62 63struct mscm_softc { 64 struct resource *res[1]; 65 bus_space_tag_t bst; 66 bus_space_handle_t bsh; 67}; 68 69static struct resource_spec mscm_spec[] = { 70 { SYS_RES_MEMORY, 0, RF_ACTIVE }, 71 { -1, 0 } 72}; 73 74static int 75mscm_probe(device_t dev) 76{ 77 78 if (!ofw_bus_is_compatible(dev, "fsl,mvf600-mscm")) 79 return (ENXIO); 80 81 device_set_desc(dev, "Vybrid Family Miscellaneous System Control Module"); 82 return (BUS_PROBE_DEFAULT); 83} 84 85static int 86mscm_attach(device_t dev) 87{ 88 struct mscm_softc *sc; 89 int i; 90 91 sc = device_get_softc(dev); 92 93 if (bus_alloc_resources(dev, mscm_spec, sc->res)) { 94 device_printf(dev, "could not allocate resources\n"); 95 return (ENXIO); 96 } 97 98 /* Memory interface */ 99 sc->bst = rman_get_bustag(sc->res[0]); 100 sc->bsh = rman_get_bushandle(sc->res[0]); 101 102 /* Route all the interrupts to CP0 */ 103 for (i = 0; i < VF_NINT; i++) 104 WRITE2(sc, MSCM_IRSPRC(i), 1); 105 106 return (0); 107} 108 109static device_method_t mscm_methods[] = { 110 DEVMETHOD(device_probe, mscm_probe), 111 DEVMETHOD(device_attach, mscm_attach), 112 { 0, 0 } 113}; 114 115static driver_t mscm_driver = { 116 "mscm", 117 mscm_methods, 118 sizeof(struct mscm_softc), 119}; 120 121static devclass_t mscm_devclass; 122 123DRIVER_MODULE(mscm, simplebus, mscm_driver, mscm_devclass, 0, 0); 124