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/param.h> 30 #include <sys/systm.h> 31 #include <sys/bus.h> 32 #include <sys/kernel.h> 33 #include <sys/module.h> 34 #include <sys/socket.h> 35 36 #include <dev/ofw/ofw_bus.h> 37 #include <dev/ofw/ofw_bus_subr.h> 38 #include <dev/fdt/simplebus.h> 39 40 #include <net/if.h> 41 42 #include <machine/bus.h> 43 #include <machine/resource.h> 44 45 #include "thunder_mdio_var.h" 46 47 static int thunder_mdio_fdt_probe(device_t); 48 static int thunder_mdio_fdt_attach(device_t); 49 50 static device_method_t thunder_mdio_fdt_methods[] = { 51 /* Device interface */ 52 DEVMETHOD(device_probe, thunder_mdio_fdt_probe), 53 DEVMETHOD(device_attach, thunder_mdio_fdt_attach), 54 55 /* End */ 56 DEVMETHOD_END 57 }; 58 59 DEFINE_CLASS_1(thunder_mdio, thunder_mdio_fdt_driver, thunder_mdio_fdt_methods, 60 sizeof(struct thunder_mdio_softc), thunder_mdio_driver); 61 62 EARLY_DRIVER_MODULE(thunder_mdio, ofwbus, thunder_mdio_fdt_driver, 0, 0, 63 BUS_PASS_BUS + BUS_PASS_ORDER_MIDDLE); 64 EARLY_DRIVER_MODULE(thunder_mdio, mdionexus, thunder_mdio_fdt_driver, 0, 0, 65 BUS_PASS_BUS + BUS_PASS_ORDER_MIDDLE); 66 67 static struct ofw_compat_data mdio_compat_data[] = { 68 {"cavium,octeon-3860-mdio", true}, 69 {"cavium,thunder-8890-mdio", true}, 70 {NULL, false} 71 }; 72 73 static int 74 thunder_mdio_fdt_probe(device_t dev) 75 { 76 77 if (!ofw_bus_status_okay(dev)) 78 return (ENXIO); 79 if (!ofw_bus_search_compatible(dev, mdio_compat_data)->ocd_data) 80 return (ENXIO); 81 82 device_set_desc(dev, THUNDER_MDIO_DEVSTR); 83 return (BUS_PROBE_DEFAULT); 84 } 85 86 static int 87 thunder_mdio_fdt_attach(device_t dev) 88 { 89 phandle_t node; 90 int ret; 91 92 /* Call core attach */ 93 ret = thunder_mdio_attach(dev); 94 if (ret != 0) 95 return (ret); 96 /* 97 * Register device to this node/xref. 98 * Thanks to that we will be able to retrieve device_t structure 99 * while holding only node reference acquired from FDT. 100 */ 101 node = ofw_bus_get_node(dev); 102 OF_device_register_xref(OF_xref_from_node(node), dev); 103 104 return (0); 105 } 106 107 struct mdionexus_softc { 108 struct simplebus_softc simplebus_sc; 109 }; 110 111 static device_probe_t mdionexus_fdt_probe; 112 static device_attach_t mdionexus_fdt_attach; 113 114 static const struct ofw_bus_devinfo * mdionexus_ofw_get_devinfo(device_t, 115 device_t); 116 117 static device_method_t mdionexus_fdt_methods[] = { 118 /* Device interface */ 119 DEVMETHOD(device_probe, mdionexus_fdt_probe), 120 DEVMETHOD(device_attach, mdionexus_fdt_attach), 121 122 /* Bus interface */ 123 DEVMETHOD(bus_alloc_resource, bus_generic_alloc_resource), 124 DEVMETHOD(bus_release_resource, bus_generic_release_resource), 125 DEVMETHOD(bus_activate_resource, bus_generic_activate_resource), 126 127 /* ofw_bus interface */ 128 DEVMETHOD(ofw_bus_get_devinfo, mdionexus_ofw_get_devinfo), 129 DEVMETHOD(ofw_bus_get_compat, ofw_bus_gen_get_compat), 130 DEVMETHOD(ofw_bus_get_model, ofw_bus_gen_get_model), 131 DEVMETHOD(ofw_bus_get_name, ofw_bus_gen_get_name), 132 DEVMETHOD(ofw_bus_get_node, ofw_bus_gen_get_node), 133 DEVMETHOD(ofw_bus_get_type, ofw_bus_gen_get_type), 134 135 DEVMETHOD_END 136 }; 137 138 DEFINE_CLASS_0(mdionexus, mdionexus_fdt_driver, mdionexus_fdt_methods, 139 sizeof(struct mdionexus_softc)); 140 141 EARLY_DRIVER_MODULE(mdionexus, mrmlbus, mdionexus_fdt_driver, 0, 0, 142 BUS_PASS_BUS + BUS_PASS_ORDER_MIDDLE); 143 144 static int mdionexus_ofw_fill_ranges(phandle_t, struct simplebus_softc *); 145 static int mdionexus_ofw_bus_attach(device_t); 146 147 static int 148 mdionexus_fdt_probe(device_t dev) 149 { 150 151 if (!ofw_bus_status_okay(dev)) 152 return (ENXIO); 153 154 if (!ofw_bus_is_compatible(dev, "cavium,thunder-8890-mdio-nexus")) 155 return (ENXIO); 156 157 device_set_desc(dev, "Cavium ThunderX MDIO nexus"); 158 return (BUS_PROBE_SPECIFIC); 159 } 160 161 static int 162 mdionexus_fdt_attach(device_t dev) 163 { 164 int err; 165 166 err = mdionexus_ofw_bus_attach(dev); 167 if (err != 0) 168 return (err); 169 170 return (bus_generic_attach(dev)); 171 } 172 173 /* OFW bus interface */ 174 struct mdionexus_ofw_devinfo { 175 struct ofw_bus_devinfo di_dinfo; 176 struct resource_list di_rl; 177 }; 178 179 static const struct ofw_bus_devinfo * 180 mdionexus_ofw_get_devinfo(device_t bus __unused, device_t child) 181 { 182 struct mdionexus_ofw_devinfo *di; 183 184 di = device_get_ivars(child); 185 return (&di->di_dinfo); 186 } 187 188 /* Helper functions */ 189 190 static int 191 mdionexus_ofw_fill_ranges(phandle_t node, struct simplebus_softc *sc) 192 { 193 int host_address_cells; 194 cell_t *base_ranges; 195 ssize_t nbase_ranges; 196 int err; 197 int i, j, k; 198 199 err = OF_searchencprop(OF_parent(node), "#address-cells", 200 &host_address_cells, sizeof(host_address_cells)); 201 if (err <= 0) 202 return (-1); 203 204 nbase_ranges = OF_getproplen(node, "ranges"); 205 if (nbase_ranges < 0) 206 return (-1); 207 sc->nranges = nbase_ranges / sizeof(cell_t) / 208 (sc->acells + host_address_cells + sc->scells); 209 if (sc->nranges == 0) 210 return (0); 211 212 sc->ranges = malloc(sc->nranges * sizeof(sc->ranges[0]), 213 M_THUNDER_MDIO, M_WAITOK); 214 base_ranges = malloc(nbase_ranges, M_THUNDER_MDIO, M_WAITOK); 215 OF_getencprop(node, "ranges", base_ranges, nbase_ranges); 216 217 for (i = 0, j = 0; i < sc->nranges; i++) { 218 sc->ranges[i].bus = 0; 219 for (k = 0; k < sc->acells; k++) { 220 sc->ranges[i].bus <<= 32; 221 sc->ranges[i].bus |= base_ranges[j++]; 222 } 223 sc->ranges[i].host = 0; 224 for (k = 0; k < host_address_cells; k++) { 225 sc->ranges[i].host <<= 32; 226 sc->ranges[i].host |= base_ranges[j++]; 227 } 228 sc->ranges[i].size = 0; 229 for (k = 0; k < sc->scells; k++) { 230 sc->ranges[i].size <<= 32; 231 sc->ranges[i].size |= base_ranges[j++]; 232 } 233 } 234 235 free(base_ranges, M_THUNDER_MDIO); 236 return (sc->nranges); 237 } 238 239 static int 240 mdionexus_ofw_bus_attach(device_t dev) 241 { 242 struct simplebus_softc *sc; 243 struct mdionexus_ofw_devinfo *di; 244 device_t child; 245 phandle_t parent, node; 246 247 parent = ofw_bus_get_node(dev); 248 simplebus_init(dev, parent); 249 250 sc = (struct simplebus_softc *)device_get_softc(dev); 251 252 if (mdionexus_ofw_fill_ranges(parent, sc) < 0) { 253 device_printf(dev, "could not get ranges\n"); 254 return (ENXIO); 255 } 256 /* Iterate through all bus subordinates */ 257 for (node = OF_child(parent); node > 0; node = OF_peer(node)) { 258 /* Allocate and populate devinfo. */ 259 di = malloc(sizeof(*di), M_THUNDER_MDIO, M_WAITOK | M_ZERO); 260 if (ofw_bus_gen_setup_devinfo(&di->di_dinfo, node) != 0) { 261 free(di, M_THUNDER_MDIO); 262 continue; 263 } 264 265 /* Initialize and populate resource list. */ 266 resource_list_init(&di->di_rl); 267 ofw_bus_reg_to_rl(dev, node, sc->acells, sc->scells, 268 &di->di_rl); 269 ofw_bus_intr_to_rl(dev, node, &di->di_rl, NULL); 270 271 /* Add newbus device for this FDT node */ 272 child = device_add_child(dev, NULL, -1); 273 if (child == NULL) { 274 resource_list_free(&di->di_rl); 275 ofw_bus_gen_destroy_devinfo(&di->di_dinfo); 276 free(di, M_THUNDER_MDIO); 277 continue; 278 } 279 280 device_set_ivars(child, di); 281 } 282 283 return (0); 284 } 285