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 struct bcma_softc *sc; 76 const struct bhnd_chipid *cid; 77 struct resource *erom_res; 78 int error; 79 int rid; 80 81 sc = device_get_softc(dev); 82 83 /* Map the EROM resource and enumerate our children. */ 84 cid = BHNDB_GET_CHIPID(device_get_parent(dev), dev); 85 rid = 0; 86 erom_res = bus_alloc_resource(dev, SYS_RES_MEMORY, &rid, cid->enum_addr, 87 cid->enum_addr + BCMA_EROM_TABLE_SIZE, BCMA_EROM_TABLE_SIZE, 88 RF_ACTIVE); 89 if (erom_res == NULL) { 90 device_printf(dev, "failed to allocate EROM resource\n"); 91 return (ENXIO); 92 } 93 94 error = bcma_add_children(dev, erom_res, BCMA_EROM_TABLE_START); 95 96 /* Clean up */ 97 bus_release_resource(dev, SYS_RES_MEMORY, rid, erom_res); 98 if (error) 99 return (error); 100 101 /* Initialize full bridge configuration */ 102 error = BHNDB_INIT_FULL_CONFIG(device_get_parent(dev), dev, 103 bhndb_bcma_priority_table); 104 if (error) 105 return (error); 106 107 /* Ask our parent bridge to find the corresponding bridge core */ 108 sc->hostb_dev = BHNDB_FIND_HOSTB_DEVICE(device_get_parent(dev), dev); 109 110 /* Call our superclass' implementation */ 111 return (bcma_attach(dev)); 112 } 113 114 static int 115 bcma_bhndb_suspend_child(device_t dev, device_t child) 116 { 117 struct bcma_devinfo *dinfo; 118 int error; 119 120 if (device_get_parent(child) != dev) 121 BUS_SUSPEND_CHILD(device_get_parent(dev), child); 122 123 if (device_is_suspended(child)) 124 return (EBUSY); 125 126 dinfo = device_get_ivars(child); 127 128 /* Suspend the child */ 129 if ((error = bhnd_generic_br_suspend_child(dev, child))) 130 return (error); 131 132 /* Suspend child's agent resource */ 133 if (dinfo->res_agent != NULL) 134 BHNDB_SUSPEND_RESOURCE(device_get_parent(dev), dev, 135 SYS_RES_MEMORY, dinfo->res_agent->res); 136 137 return (0); 138 } 139 140 static int 141 bcma_bhndb_resume_child(device_t dev, device_t child) 142 { 143 struct bcma_devinfo *dinfo; 144 int error; 145 146 if (device_get_parent(child) != dev) 147 BUS_SUSPEND_CHILD(device_get_parent(dev), child); 148 149 if (!device_is_suspended(child)) 150 return (EBUSY); 151 152 dinfo = device_get_ivars(child); 153 154 /* Resume child's agent resource */ 155 if (dinfo->res_agent != NULL) { 156 error = BHNDB_RESUME_RESOURCE(device_get_parent(dev), dev, 157 SYS_RES_MEMORY, dinfo->res_agent->res); 158 if (error) 159 return (error); 160 } 161 162 /* Resume the child */ 163 if ((error = bhnd_generic_br_resume_child(dev, child))) { 164 /* On failure, re-suspend the agent resource */ 165 if (dinfo->res_agent != NULL) { 166 BHNDB_SUSPEND_RESOURCE(device_get_parent(dev), dev, 167 SYS_RES_MEMORY, dinfo->res_agent->res); 168 } 169 170 return (error); 171 } 172 173 return (0); 174 } 175 176 static device_method_t bcma_bhndb_methods[] = { 177 /* Device interface */ 178 DEVMETHOD(device_probe, bcma_bhndb_probe), 179 DEVMETHOD(device_attach, bcma_bhndb_attach), 180 181 /* Bus interface */ 182 DEVMETHOD(bus_suspend_child, bcma_bhndb_suspend_child), 183 DEVMETHOD(bus_resume_child, bcma_bhndb_resume_child), 184 185 DEVMETHOD_END 186 }; 187 188 DEFINE_CLASS_2(bhnd, bcma_bhndb_driver, bcma_bhndb_methods, 189 sizeof(struct bcma_softc), bhnd_bhndb_driver, bcma_driver); 190 191 DRIVER_MODULE(bcma_bhndb, bhndb, bcma_bhndb_driver, bhnd_devclass, NULL, NULL); 192 193 MODULE_VERSION(bcma_bhndb, 1); 194 MODULE_DEPEND(bcma_bhndb, bcma, 1, 1, 1); 195 MODULE_DEPEND(bcma_bhndb, bhnd, 1, 1, 1); 196 MODULE_DEPEND(bcma_bhndb, bhndb, 1, 1, 1); 197