1 /*- 2 * SPDX-License-Identifier: BSD-2-Clause 3 * 4 * Copyright (c) 2015 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 __FBSDID("$FreeBSD$"); 34 35 #include <sys/param.h> 36 #include <sys/kernel.h> 37 #include <sys/bus.h> 38 #include <sys/module.h> 39 40 #include <dev/bhnd/bhnd_ids.h> 41 #include <dev/bhnd/bhndb/bhndbvar.h> 42 #include <dev/bhnd/bhndb/bhndb_hwdata.h> 43 44 #include "bcmavar.h" 45 46 #include "bcma_eromreg.h" 47 #include "bcma_eromvar.h" 48 49 /* 50 * Supports attachment of bcma(4) bus devices via a bhndb bridge. 51 */ 52 53 static int 54 bcma_bhndb_probe(device_t dev) 55 { 56 const struct bhnd_chipid *cid; 57 int error; 58 59 /* Defer to default probe implementation */ 60 if ((error = bcma_probe(dev)) > 0) 61 return (error); 62 63 /* Check bus type */ 64 cid = BHNDB_GET_CHIPID(device_get_parent(dev), dev); 65 if (cid->chip_type != BHND_CHIPTYPE_BCMA) 66 return (ENXIO); 67 68 /* Set device description */ 69 bhnd_set_default_bus_desc(dev, cid); 70 71 return (error); 72 } 73 74 static int 75 bcma_bhndb_attach(device_t dev) 76 { 77 int error; 78 79 /* Perform initial attach and enumerate our children. */ 80 if ((error = bcma_attach(dev))) 81 goto failed; 82 83 /* Delegate remainder to standard bhnd method implementation */ 84 if ((error = bhnd_generic_attach(dev))) 85 goto failed; 86 87 return (0); 88 89 failed: 90 device_delete_children(dev); 91 return (error); 92 } 93 94 static int 95 bcma_bhndb_suspend_child(device_t dev, device_t child) 96 { 97 struct bcma_devinfo *dinfo; 98 int error; 99 100 if (device_get_parent(child) != dev) 101 BUS_SUSPEND_CHILD(device_get_parent(dev), child); 102 103 if (device_is_suspended(child)) 104 return (EBUSY); 105 106 dinfo = device_get_ivars(child); 107 108 /* Suspend the child */ 109 if ((error = bhnd_generic_br_suspend_child(dev, child))) 110 return (error); 111 112 /* Suspend child's agent resource */ 113 if (dinfo->res_agent != NULL) 114 BHNDB_SUSPEND_RESOURCE(device_get_parent(dev), dev, 115 SYS_RES_MEMORY, dinfo->res_agent->res); 116 117 return (0); 118 } 119 120 static int 121 bcma_bhndb_resume_child(device_t dev, device_t child) 122 { 123 struct bcma_devinfo *dinfo; 124 int error; 125 126 if (device_get_parent(child) != dev) 127 BUS_SUSPEND_CHILD(device_get_parent(dev), child); 128 129 if (!device_is_suspended(child)) 130 return (EBUSY); 131 132 dinfo = device_get_ivars(child); 133 134 /* Resume child's agent resource */ 135 if (dinfo->res_agent != NULL) { 136 error = BHNDB_RESUME_RESOURCE(device_get_parent(dev), dev, 137 SYS_RES_MEMORY, dinfo->res_agent->res); 138 if (error) 139 return (error); 140 } 141 142 /* Resume the child */ 143 if ((error = bhnd_generic_br_resume_child(dev, child))) { 144 /* On failure, re-suspend the agent resource */ 145 if (dinfo->res_agent != NULL) { 146 BHNDB_SUSPEND_RESOURCE(device_get_parent(dev), dev, 147 SYS_RES_MEMORY, dinfo->res_agent->res); 148 } 149 150 return (error); 151 } 152 153 return (0); 154 } 155 156 static device_method_t bcma_bhndb_methods[] = { 157 /* Device interface */ 158 DEVMETHOD(device_probe, bcma_bhndb_probe), 159 DEVMETHOD(device_attach, bcma_bhndb_attach), 160 161 /* Bus interface */ 162 DEVMETHOD(bus_suspend_child, bcma_bhndb_suspend_child), 163 DEVMETHOD(bus_resume_child, bcma_bhndb_resume_child), 164 165 DEVMETHOD_END 166 }; 167 168 DEFINE_CLASS_2(bhnd, bcma_bhndb_driver, bcma_bhndb_methods, 169 sizeof(struct bcma_softc), bhnd_bhndb_driver, bcma_driver); 170 171 DRIVER_MODULE(bcma_bhndb, bhndb, bcma_bhndb_driver, NULL, NULL); 172 173 MODULE_VERSION(bcma_bhndb, 1); 174 MODULE_DEPEND(bcma_bhndb, bcma, 1, 1, 1); 175 MODULE_DEPEND(bcma_bhndb, bhnd, 1, 1, 1); 176 MODULE_DEPEND(bcma_bhndb, bhndb, 1, 1, 1); 177