1 /*- 2 * Copyright (c) 2015 Landon Fuller <landon@landonf.org> 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 * without modification. 11 * 2. Redistributions in binary form must reproduce at minimum a disclaimer 12 * similar to the "NO WARRANTY" disclaimer below ("Disclaimer") and any 13 * redistribution must be conditioned upon including a substantially 14 * similar Disclaimer requirement for further binary redistribution. 15 * 16 * NO WARRANTY 17 * THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS 18 * ``AS IS'' AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT 19 * LIMITED TO, THE IMPLIED WARRANTIES OF NONINFRINGEMENT, MERCHANTIBILITY 20 * AND FITNESS FOR A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL 21 * THE COPYRIGHT HOLDERS OR CONTRIBUTORS BE LIABLE FOR SPECIAL, EXEMPLARY, 22 * OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF 23 * SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS 24 * INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER 25 * IN CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) 26 * ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF 27 * THE POSSIBILITY OF SUCH DAMAGES. 28 */ 29 30 #include <sys/cdefs.h> 31 __FBSDID("$FreeBSD$"); 32 33 #include <sys/param.h> 34 #include <sys/kernel.h> 35 #include <sys/bus.h> 36 #include <sys/module.h> 37 38 #include <dev/bhnd/bhnd_ids.h> 39 #include <dev/bhnd/bhndb/bhndbvar.h> 40 #include <dev/bhnd/bhndb/bhndb_hwdata.h> 41 42 #include "bcmavar.h" 43 44 #include "bcma_eromreg.h" 45 #include "bcma_eromvar.h" 46 47 /* 48 * Supports attachment of bcma(4) bus devices via a bhndb bridge. 49 */ 50 51 static int 52 bcma_bhndb_probe(device_t dev) 53 { 54 const struct bhnd_chipid *cid; 55 int error; 56 57 /* Defer to default probe implementation */ 58 if ((error = bcma_probe(dev)) > 0) 59 return (error); 60 61 /* Check bus type */ 62 cid = BHNDB_GET_CHIPID(device_get_parent(dev), dev); 63 if (cid->chip_type != BHND_CHIPTYPE_BCMA) 64 return (ENXIO); 65 66 /* Set device description */ 67 bhnd_set_default_bus_desc(dev, cid); 68 69 return (error); 70 } 71 72 static int 73 bcma_bhndb_attach(device_t dev) 74 { 75 int error; 76 77 /* Perform initial attach and enumerate our children. */ 78 if ((error = bcma_attach(dev))) 79 goto failed; 80 81 /* Delegate remainder to standard bhnd method implementation */ 82 if ((error = bhnd_generic_attach(dev))) 83 goto failed; 84 85 return (0); 86 87 failed: 88 device_delete_children(dev); 89 return (error); 90 } 91 92 static int 93 bcma_bhndb_suspend_child(device_t dev, device_t child) 94 { 95 struct bcma_devinfo *dinfo; 96 int error; 97 98 if (device_get_parent(child) != dev) 99 BUS_SUSPEND_CHILD(device_get_parent(dev), child); 100 101 if (device_is_suspended(child)) 102 return (EBUSY); 103 104 dinfo = device_get_ivars(child); 105 106 /* Suspend the child */ 107 if ((error = bhnd_generic_br_suspend_child(dev, child))) 108 return (error); 109 110 /* Suspend child's agent resource */ 111 if (dinfo->res_agent != NULL) 112 BHNDB_SUSPEND_RESOURCE(device_get_parent(dev), dev, 113 SYS_RES_MEMORY, dinfo->res_agent->res); 114 115 return (0); 116 } 117 118 static int 119 bcma_bhndb_resume_child(device_t dev, device_t child) 120 { 121 struct bcma_devinfo *dinfo; 122 int error; 123 124 if (device_get_parent(child) != dev) 125 BUS_SUSPEND_CHILD(device_get_parent(dev), child); 126 127 if (!device_is_suspended(child)) 128 return (EBUSY); 129 130 dinfo = device_get_ivars(child); 131 132 /* Resume child's agent resource */ 133 if (dinfo->res_agent != NULL) { 134 error = BHNDB_RESUME_RESOURCE(device_get_parent(dev), dev, 135 SYS_RES_MEMORY, dinfo->res_agent->res); 136 if (error) 137 return (error); 138 } 139 140 /* Resume the child */ 141 if ((error = bhnd_generic_br_resume_child(dev, child))) { 142 /* On failure, re-suspend the agent resource */ 143 if (dinfo->res_agent != NULL) { 144 BHNDB_SUSPEND_RESOURCE(device_get_parent(dev), dev, 145 SYS_RES_MEMORY, dinfo->res_agent->res); 146 } 147 148 return (error); 149 } 150 151 return (0); 152 } 153 154 static device_method_t bcma_bhndb_methods[] = { 155 /* Device interface */ 156 DEVMETHOD(device_probe, bcma_bhndb_probe), 157 DEVMETHOD(device_attach, bcma_bhndb_attach), 158 159 /* Bus interface */ 160 DEVMETHOD(bus_suspend_child, bcma_bhndb_suspend_child), 161 DEVMETHOD(bus_resume_child, bcma_bhndb_resume_child), 162 163 DEVMETHOD_END 164 }; 165 166 DEFINE_CLASS_2(bhnd, bcma_bhndb_driver, bcma_bhndb_methods, 167 sizeof(struct bcma_softc), bhnd_bhndb_driver, bcma_driver); 168 169 DRIVER_MODULE(bcma_bhndb, bhndb, bcma_bhndb_driver, bhnd_devclass, NULL, NULL); 170 171 MODULE_VERSION(bcma_bhndb, 1); 172 MODULE_DEPEND(bcma_bhndb, bcma, 1, 1, 1); 173 MODULE_DEPEND(bcma_bhndb, bhnd, 1, 1, 1); 174 MODULE_DEPEND(bcma_bhndb, bhndb, 1, 1, 1); 175