1 /*- 2 * SPDX-License-Identifier: BSD-2-Clause 3 * 4 * Copyright (c) 2015-2016 Landon Fuller <landon@landonf.org> 5 * All rights reserved. 6 * 7 * Redistribution and use in source and binary forms, with or without 8 * modification, are permitted provided that the following conditions 9 * are met: 10 * 1. Redistributions of source code must retain the above copyright 11 * notice, this list of conditions and the following disclaimer, 12 * without modification. 13 * 2. Redistributions in binary form must reproduce at minimum a disclaimer 14 * similar to the "NO WARRANTY" disclaimer below ("Disclaimer") and any 15 * redistribution must be conditioned upon including a substantially 16 * similar Disclaimer requirement for further binary redistribution. 17 * 18 * NO WARRANTY 19 * THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS 20 * ``AS IS'' AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT 21 * LIMITED TO, THE IMPLIED WARRANTIES OF NONINFRINGEMENT, MERCHANTIBILITY 22 * AND FITNESS FOR A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL 23 * THE COPYRIGHT HOLDERS OR CONTRIBUTORS BE LIABLE FOR SPECIAL, EXEMPLARY, 24 * OR 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 27 * IN 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 29 * THE POSSIBILITY OF SUCH DAMAGES. 30 */ 31 32 #include <sys/cdefs.h> 33 #include <sys/param.h> 34 #include <sys/kernel.h> 35 #include <sys/lock.h> 36 #include <sys/bus.h> 37 #include <sys/module.h> 38 #include <sys/mutex.h> 39 #include <sys/systm.h> 40 41 #include <machine/bus.h> 42 #include <machine/resource.h> 43 44 #include <dev/bhnd/bhnd.h> 45 46 #include "bhnd_pmureg.h" 47 #include "bhnd_pmuvar.h" 48 49 /* 50 * PMU core driver. 51 */ 52 53 /* Supported device identifiers */ 54 static const struct bhnd_device bhnd_pmucore_devices[] = { 55 BHND_DEVICE(BCM, PMU, NULL, NULL), 56 57 BHND_DEVICE_END 58 }; 59 60 static int 61 bhnd_pmu_core_probe(device_t dev) 62 { 63 const struct bhnd_device *id; 64 int error; 65 66 id = bhnd_device_lookup(dev, bhnd_pmucore_devices, 67 sizeof(bhnd_pmucore_devices[0])); 68 if (id == NULL) 69 return (ENXIO); 70 71 /* Delegate to common driver implementation */ 72 if ((error = bhnd_pmu_probe(dev)) > 0) 73 return (error); 74 75 bhnd_set_default_core_desc(dev); 76 return (BUS_PROBE_DEFAULT); 77 } 78 79 static int 80 bhnd_pmu_core_attach(device_t dev) 81 { 82 struct bhnd_pmu_softc *sc; 83 struct bhnd_resource *res; 84 int error; 85 int rid; 86 87 sc = device_get_softc(dev); 88 89 /* Allocate register block */ 90 rid = 0; 91 res = bhnd_alloc_resource_any(dev, SYS_RES_MEMORY, &rid, RF_ACTIVE); 92 if (res == NULL) { 93 device_printf(dev, "failed to allocate resources\n"); 94 return (ENXIO); 95 } 96 97 /* Allocate our per-core PMU state */ 98 if ((error = bhnd_alloc_pmu(dev))) { 99 device_printf(sc->dev, "failed to allocate PMU state: %d\n", 100 error); 101 102 return (error); 103 } 104 105 /* Delegate to common driver implementation */ 106 if ((error = bhnd_pmu_attach(dev, res))) { 107 bhnd_release_resource(dev, SYS_RES_MEMORY, rid, res); 108 return (error); 109 } 110 111 sc->rid = rid; 112 return (0); 113 } 114 115 static int 116 bhnd_pmu_core_detach(device_t dev) 117 { 118 struct bhnd_pmu_softc *sc; 119 int error; 120 121 sc = device_get_softc(dev); 122 123 /* Delegate to common driver implementation */ 124 if ((error = bhnd_pmu_detach(dev))) 125 return (error); 126 127 bhnd_release_resource(dev, SYS_RES_MEMORY, sc->rid, sc->res); 128 return (0); 129 } 130 131 static device_method_t bhnd_pmucore_methods[] = { 132 /* Device interface */ 133 DEVMETHOD(device_probe, bhnd_pmu_core_probe), 134 DEVMETHOD(device_attach, bhnd_pmu_core_attach), 135 DEVMETHOD(device_detach, bhnd_pmu_core_detach), 136 137 DEVMETHOD_END 138 }; 139 140 DEFINE_CLASS_1(bhnd_pmu, bhnd_pmucore_driver, bhnd_pmucore_methods, 141 sizeof(struct bhnd_pmu_softc), bhnd_pmu_driver); 142 EARLY_DRIVER_MODULE(bhnd_pmu, bhnd, bhnd_pmucore_driver, NULL, NULL, 143 BUS_PASS_TIMER + BUS_PASS_ORDER_MIDDLE); 144 145 MODULE_DEPEND(bhnd_pmu_core, bhnd_pmu, 1, 1, 1); 146 MODULE_VERSION(bhnd_pmu_core, 1); 147