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/param.h> 33 #include <sys/kernel.h> 34 #include <sys/lock.h> 35 #include <sys/bus.h> 36 #include <sys/module.h> 37 #include <sys/mutex.h> 38 #include <sys/systm.h> 39 40 #include <machine/bus.h> 41 #include <machine/resource.h> 42 43 #include <dev/bhnd/bhnd.h> 44 45 #include "bhnd_pmureg.h" 46 #include "bhnd_pmuvar.h" 47 48 /* 49 * PMU core driver. 50 */ 51 52 /* Supported device identifiers */ 53 static const struct bhnd_device bhnd_pmucore_devices[] = { 54 BHND_DEVICE(BCM, PMU, NULL, NULL), 55 56 BHND_DEVICE_END 57 }; 58 59 static int 60 bhnd_pmu_core_probe(device_t dev) 61 { 62 const struct bhnd_device *id; 63 int error; 64 65 id = bhnd_device_lookup(dev, bhnd_pmucore_devices, 66 sizeof(bhnd_pmucore_devices[0])); 67 if (id == NULL) 68 return (ENXIO); 69 70 /* Delegate to common driver implementation */ 71 if ((error = bhnd_pmu_probe(dev)) > 0) 72 return (error); 73 74 bhnd_set_default_core_desc(dev); 75 return (BUS_PROBE_DEFAULT); 76 } 77 78 static int 79 bhnd_pmu_core_attach(device_t dev) 80 { 81 struct bhnd_pmu_softc *sc; 82 struct bhnd_resource *res; 83 int error; 84 int rid; 85 86 sc = device_get_softc(dev); 87 88 /* Allocate register block */ 89 rid = 0; 90 res = bhnd_alloc_resource_any(dev, SYS_RES_MEMORY, &rid, RF_ACTIVE); 91 if (res == NULL) { 92 device_printf(dev, "failed to allocate resources\n"); 93 return (ENXIO); 94 } 95 96 /* Allocate our per-core PMU state */ 97 if ((error = bhnd_alloc_pmu(dev))) { 98 device_printf(sc->dev, "failed to allocate PMU state: %d\n", 99 error); 100 101 return (error); 102 } 103 104 /* Delegate to common driver implementation */ 105 if ((error = bhnd_pmu_attach(dev, res))) { 106 bhnd_release_resource(dev, SYS_RES_MEMORY, rid, res); 107 return (error); 108 } 109 110 sc->rid = rid; 111 return (0); 112 } 113 114 static int 115 bhnd_pmu_core_detach(device_t dev) 116 { 117 struct bhnd_pmu_softc *sc; 118 int error; 119 120 sc = device_get_softc(dev); 121 122 /* Delegate to common driver implementation */ 123 if ((error = bhnd_pmu_detach(dev))) 124 return (error); 125 126 bhnd_release_resource(dev, SYS_RES_MEMORY, sc->rid, sc->res); 127 return (0); 128 } 129 130 static device_method_t bhnd_pmucore_methods[] = { 131 /* Device interface */ 132 DEVMETHOD(device_probe, bhnd_pmu_core_probe), 133 DEVMETHOD(device_attach, bhnd_pmu_core_attach), 134 DEVMETHOD(device_detach, bhnd_pmu_core_detach), 135 136 DEVMETHOD_END 137 }; 138 139 DEFINE_CLASS_1(bhnd_pmu, bhnd_pmucore_driver, bhnd_pmucore_methods, 140 sizeof(struct bhnd_pmu_softc), bhnd_pmu_driver); 141 EARLY_DRIVER_MODULE(bhnd_pmu, bhnd, bhnd_pmucore_driver, NULL, NULL, 142 BUS_PASS_TIMER + BUS_PASS_ORDER_MIDDLE); 143 144 MODULE_DEPEND(bhnd_pmu_core, bhnd_pmu, 1, 1, 1); 145 MODULE_VERSION(bhnd_pmu_core, 1); 146