1 /*- 2 * Copyright (c) 2015 The FreeBSD Foundation 3 * 4 * This software was developed by Semihalf under 5 * the sponsorship of the FreeBSD Foundation. 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 * 2. Redistributions in binary form must reproduce the above copyright 13 * notice, this list of conditions and the following disclaimer in the 14 * documentation and/or other materials provided with the distribution. 15 * 16 * THIS SOFTWARE IS PROVIDED BY THE AUTHOR AND CONTRIBUTORS ``AS IS'' AND 17 * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE 18 * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE 19 * ARE DISCLAIMED. IN NO EVENT SHALL THE AUTHOR OR CONTRIBUTORS BE LIABLE 20 * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL 21 * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS 22 * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) 23 * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT 24 * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY 25 * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF 26 * SUCH DAMAGE. 27 */ 28 29 #include <sys/cdefs.h> 30 __FBSDID("$FreeBSD$"); 31 32 #include <sys/param.h> 33 #include <sys/systm.h> 34 #include <sys/bus.h> 35 #include <sys/kernel.h> 36 #include <sys/module.h> 37 #include <sys/socket.h> 38 39 #include <dev/ofw/ofw_bus.h> 40 #include <dev/ofw/ofw_bus_subr.h> 41 #include <dev/fdt/simplebus.h> 42 43 #include <net/if.h> 44 45 #include <machine/bus.h> 46 #include <machine/resource.h> 47 48 #include "thunder_mdio_var.h" 49 50 static int thunder_mdio_fdt_probe(device_t); 51 static int thunder_mdio_fdt_attach(device_t); 52 53 static device_method_t thunder_mdio_fdt_methods[] = { 54 /* Device interface */ 55 DEVMETHOD(device_probe, thunder_mdio_fdt_probe), 56 DEVMETHOD(device_attach, thunder_mdio_fdt_attach), 57 58 /* End */ 59 DEVMETHOD_END 60 }; 61 62 DEFINE_CLASS_1(thunder_mdio, thunder_mdio_fdt_driver, thunder_mdio_fdt_methods, 63 sizeof(struct thunder_mdio_softc), thunder_mdio_driver); 64 65 EARLY_DRIVER_MODULE(thunder_mdio, ofwbus, thunder_mdio_fdt_driver, 0, 0, 66 BUS_PASS_BUS + BUS_PASS_ORDER_MIDDLE); 67 EARLY_DRIVER_MODULE(thunder_mdio, mdionexus, thunder_mdio_fdt_driver, 0, 0, 68 BUS_PASS_BUS + BUS_PASS_ORDER_MIDDLE); 69 70 static struct ofw_compat_data mdio_compat_data[] = { 71 {"cavium,octeon-3860-mdio", true}, 72 {"cavium,thunder-8890-mdio", true}, 73 {NULL, false} 74 }; 75 76 static int 77 thunder_mdio_fdt_probe(device_t dev) 78 { 79 80 if (!ofw_bus_status_okay(dev)) 81 return (ENXIO); 82 if (!ofw_bus_search_compatible(dev, mdio_compat_data)->ocd_data) 83 return (ENXIO); 84 85 device_set_desc(dev, THUNDER_MDIO_DEVSTR); 86 return (BUS_PROBE_DEFAULT); 87 } 88 89 static int 90 thunder_mdio_fdt_attach(device_t dev) 91 { 92 phandle_t node; 93 int ret; 94 95 /* Call core attach */ 96 ret = thunder_mdio_attach(dev); 97 if (ret != 0) 98 return (ret); 99 /* 100 * Register device to this node/xref. 101 * Thanks to that we will be able to retrieve device_t structure 102 * while holding only node reference acquired from FDT. 103 */ 104 node = ofw_bus_get_node(dev); 105 OF_device_register_xref(OF_xref_from_node(node), dev); 106 107 return (0); 108 } 109 110 struct mdionexus_softc { 111 struct simplebus_softc simplebus_sc; 112 }; 113 114 static device_probe_t mdionexus_fdt_probe; 115 static device_attach_t mdionexus_fdt_attach; 116 117 static const struct ofw_bus_devinfo * mdionexus_ofw_get_devinfo(device_t, 118 device_t); 119 120 static device_method_t mdionexus_fdt_methods[] = { 121 /* Device interface */ 122 DEVMETHOD(device_probe, mdionexus_fdt_probe), 123 DEVMETHOD(device_attach, mdionexus_fdt_attach), 124 125 /* Bus interface */ 126 DEVMETHOD(bus_alloc_resource, bus_generic_alloc_resource), 127 DEVMETHOD(bus_release_resource, bus_generic_release_resource), 128 DEVMETHOD(bus_activate_resource, bus_generic_activate_resource), 129 130 /* ofw_bus interface */ 131 DEVMETHOD(ofw_bus_get_devinfo, mdionexus_ofw_get_devinfo), 132 DEVMETHOD(ofw_bus_get_compat, ofw_bus_gen_get_compat), 133 DEVMETHOD(ofw_bus_get_model, ofw_bus_gen_get_model), 134 DEVMETHOD(ofw_bus_get_name, ofw_bus_gen_get_name), 135 DEVMETHOD(ofw_bus_get_node, ofw_bus_gen_get_node), 136 DEVMETHOD(ofw_bus_get_type, ofw_bus_gen_get_type), 137 138 DEVMETHOD_END 139 }; 140 141 DEFINE_CLASS_0(mdionexus, mdionexus_fdt_driver, mdionexus_fdt_methods, 142 sizeof(struct mdionexus_softc)); 143 144 EARLY_DRIVER_MODULE(mdionexus, mrmlbus, mdionexus_fdt_driver, 0, 0, 145 BUS_PASS_BUS + BUS_PASS_ORDER_MIDDLE); 146 147 static int mdionexus_ofw_fill_ranges(phandle_t, struct simplebus_softc *); 148 static int mdionexus_ofw_bus_attach(device_t); 149 150 static int 151 mdionexus_fdt_probe(device_t dev) 152 { 153 154 if (!ofw_bus_status_okay(dev)) 155 return (ENXIO); 156 157 if (!ofw_bus_is_compatible(dev, "cavium,thunder-8890-mdio-nexus")) 158 return (ENXIO); 159 160 device_set_desc(dev, "Cavium ThunderX MDIO nexus"); 161 return (BUS_PROBE_SPECIFIC); 162 } 163 164 static int 165 mdionexus_fdt_attach(device_t dev) 166 { 167 int err; 168 169 err = mdionexus_ofw_bus_attach(dev); 170 if (err != 0) 171 return (err); 172 173 return (bus_generic_attach(dev)); 174 } 175 176 /* OFW bus interface */ 177 struct mdionexus_ofw_devinfo { 178 struct ofw_bus_devinfo di_dinfo; 179 struct resource_list di_rl; 180 }; 181 182 static const struct ofw_bus_devinfo * 183 mdionexus_ofw_get_devinfo(device_t bus __unused, device_t child) 184 { 185 struct mdionexus_ofw_devinfo *di; 186 187 di = device_get_ivars(child); 188 return (&di->di_dinfo); 189 } 190 191 /* Helper functions */ 192 193 static int 194 mdionexus_ofw_fill_ranges(phandle_t node, struct simplebus_softc *sc) 195 { 196 int host_address_cells; 197 cell_t *base_ranges; 198 ssize_t nbase_ranges; 199 int err; 200 int i, j, k; 201 202 err = OF_searchencprop(OF_parent(node), "#address-cells", 203 &host_address_cells, sizeof(host_address_cells)); 204 if (err <= 0) 205 return (-1); 206 207 nbase_ranges = OF_getproplen(node, "ranges"); 208 if (nbase_ranges < 0) 209 return (-1); 210 sc->nranges = nbase_ranges / sizeof(cell_t) / 211 (sc->acells + host_address_cells + sc->scells); 212 if (sc->nranges == 0) 213 return (0); 214 215 sc->ranges = malloc(sc->nranges * sizeof(sc->ranges[0]), 216 M_THUNDER_MDIO, M_WAITOK); 217 base_ranges = malloc(nbase_ranges, M_THUNDER_MDIO, M_WAITOK); 218 OF_getencprop(node, "ranges", base_ranges, nbase_ranges); 219 220 for (i = 0, j = 0; i < sc->nranges; i++) { 221 sc->ranges[i].bus = 0; 222 for (k = 0; k < sc->acells; k++) { 223 sc->ranges[i].bus <<= 32; 224 sc->ranges[i].bus |= base_ranges[j++]; 225 } 226 sc->ranges[i].host = 0; 227 for (k = 0; k < host_address_cells; k++) { 228 sc->ranges[i].host <<= 32; 229 sc->ranges[i].host |= base_ranges[j++]; 230 } 231 sc->ranges[i].size = 0; 232 for (k = 0; k < sc->scells; k++) { 233 sc->ranges[i].size <<= 32; 234 sc->ranges[i].size |= base_ranges[j++]; 235 } 236 } 237 238 free(base_ranges, M_THUNDER_MDIO); 239 return (sc->nranges); 240 } 241 242 static int 243 mdionexus_ofw_bus_attach(device_t dev) 244 { 245 struct simplebus_softc *sc; 246 struct mdionexus_ofw_devinfo *di; 247 device_t child; 248 phandle_t parent, node; 249 250 parent = ofw_bus_get_node(dev); 251 simplebus_init(dev, parent); 252 253 sc = (struct simplebus_softc *)device_get_softc(dev); 254 255 if (mdionexus_ofw_fill_ranges(parent, sc) < 0) { 256 device_printf(dev, "could not get ranges\n"); 257 return (ENXIO); 258 } 259 /* Iterate through all bus subordinates */ 260 for (node = OF_child(parent); node > 0; node = OF_peer(node)) { 261 /* Allocate and populate devinfo. */ 262 di = malloc(sizeof(*di), M_THUNDER_MDIO, M_WAITOK | M_ZERO); 263 if (ofw_bus_gen_setup_devinfo(&di->di_dinfo, node) != 0) { 264 free(di, M_THUNDER_MDIO); 265 continue; 266 } 267 268 /* Initialize and populate resource list. */ 269 resource_list_init(&di->di_rl); 270 ofw_bus_reg_to_rl(dev, node, sc->acells, sc->scells, 271 &di->di_rl); 272 ofw_bus_intr_to_rl(dev, node, &di->di_rl, NULL); 273 274 /* Add newbus device for this FDT node */ 275 child = device_add_child(dev, NULL, -1); 276 if (child == NULL) { 277 resource_list_free(&di->di_rl); 278 ofw_bus_gen_destroy_devinfo(&di->di_dinfo); 279 free(di, M_THUNDER_MDIO); 280 continue; 281 } 282 283 device_set_ivars(child, di); 284 } 285 286 return (0); 287 } 288