1 /*- 2 * Copyright (c) 2009-2010 The FreeBSD Foundation 3 * All rights reserved. 4 * 5 * This software was developed by Semihalf under sponsorship from 6 * the FreeBSD Foundation. 7 * 8 * Redistribution and use in source and binary forms, with or without 9 * modification, are permitted provided that the following conditions 10 * are met: 11 * 1. Redistributions of source code must retain the above copyright 12 * notice, this list of conditions and the following disclaimer. 13 * 2. Redistributions in binary form must reproduce the above copyright 14 * notice, this list of conditions and the following disclaimer in the 15 * documentation and/or other materials provided with the distribution. 16 * 17 * THIS SOFTWARE IS PROVIDED BY THE AUTHOR AND CONTRIBUTORS ``AS IS'' AND 18 * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE 19 * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE 20 * ARE DISCLAIMED. IN NO EVENT SHALL THE AUTHOR OR CONTRIBUTORS BE LIABLE 21 * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL 22 * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS 23 * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) 24 * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT 25 * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY 26 * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF 27 * SUCH DAMAGE. 28 */ 29 30 #include <sys/cdefs.h> 31 __FBSDID("$FreeBSD$"); 32 33 #include "opt_platform.h" 34 #include <sys/param.h> 35 #include <sys/systm.h> 36 #include <sys/ktr.h> 37 #include <sys/kernel.h> 38 #include <sys/module.h> 39 #include <sys/bus.h> 40 #include <sys/rman.h> 41 #include <sys/malloc.h> 42 43 #include <machine/fdt.h> 44 45 #include <dev/ofw/ofw_bus.h> 46 #include <dev/ofw/ofw_bus_subr.h> 47 #include <dev/ofw/openfirm.h> 48 49 #include "fdt_common.h" 50 #include "ofw_bus_if.h" 51 52 #ifdef DEBUG 53 #define debugf(fmt, args...) do { printf("%s(): ", __func__); \ 54 printf(fmt,##args); } while (0) 55 #else 56 #define debugf(fmt, args...) 57 #endif 58 59 static MALLOC_DEFINE(M_SIMPLEBUS, "simplebus", "simplebus devices information"); 60 61 struct simplebus_softc { 62 int sc_addr_cells; 63 int sc_size_cells; 64 }; 65 66 struct simplebus_devinfo { 67 struct ofw_bus_devinfo di_ofw; 68 struct resource_list di_res; 69 70 /* Interrupts sense-level info for this device */ 71 struct fdt_sense_level di_intr_sl[DI_MAX_INTR_NUM]; 72 }; 73 74 /* 75 * Prototypes. 76 */ 77 static int simplebus_probe(device_t); 78 static int simplebus_attach(device_t); 79 80 static int simplebus_print_child(device_t, device_t); 81 static int simplebus_setup_intr(device_t, device_t, struct resource *, int, 82 driver_filter_t *, driver_intr_t *, void *, void **); 83 84 static struct resource *simplebus_alloc_resource(device_t, device_t, int, 85 int *, u_long, u_long, u_long, u_int); 86 static struct resource_list *simplebus_get_resource_list(device_t, device_t); 87 88 static ofw_bus_get_devinfo_t simplebus_get_devinfo; 89 90 /* 91 * Bus interface definition. 92 */ 93 static device_method_t simplebus_methods[] = { 94 /* Device interface */ 95 DEVMETHOD(device_probe, simplebus_probe), 96 DEVMETHOD(device_attach, simplebus_attach), 97 DEVMETHOD(device_detach, bus_generic_detach), 98 DEVMETHOD(device_shutdown, bus_generic_shutdown), 99 DEVMETHOD(device_suspend, bus_generic_suspend), 100 DEVMETHOD(device_resume, bus_generic_resume), 101 102 /* Bus interface */ 103 DEVMETHOD(bus_print_child, simplebus_print_child), 104 DEVMETHOD(bus_alloc_resource, simplebus_alloc_resource), 105 DEVMETHOD(bus_release_resource, bus_generic_release_resource), 106 DEVMETHOD(bus_activate_resource, bus_generic_activate_resource), 107 DEVMETHOD(bus_deactivate_resource, bus_generic_deactivate_resource), 108 DEVMETHOD(bus_setup_intr, simplebus_setup_intr), 109 DEVMETHOD(bus_teardown_intr, bus_generic_teardown_intr), 110 DEVMETHOD(bus_get_resource_list, simplebus_get_resource_list), 111 112 /* OFW bus interface */ 113 DEVMETHOD(ofw_bus_get_devinfo, simplebus_get_devinfo), 114 DEVMETHOD(ofw_bus_get_compat, ofw_bus_gen_get_compat), 115 DEVMETHOD(ofw_bus_get_model, ofw_bus_gen_get_model), 116 DEVMETHOD(ofw_bus_get_name, ofw_bus_gen_get_name), 117 DEVMETHOD(ofw_bus_get_node, ofw_bus_gen_get_node), 118 DEVMETHOD(ofw_bus_get_type, ofw_bus_gen_get_type), 119 120 { 0, 0 } 121 }; 122 123 static driver_t simplebus_driver = { 124 "simplebus", 125 simplebus_methods, 126 sizeof(struct simplebus_softc) 127 }; 128 129 devclass_t simplebus_devclass; 130 131 DRIVER_MODULE(simplebus, fdtbus, simplebus_driver, simplebus_devclass, 0, 0); 132 DRIVER_MODULE(simplebus, simplebus, simplebus_driver, simplebus_devclass, 0, 133 0); 134 135 static int 136 simplebus_probe(device_t dev) 137 { 138 139 if (!ofw_bus_is_compatible(dev, "simple-bus")) 140 return (ENXIO); 141 142 device_set_desc(dev, "Flattened device tree simple bus"); 143 144 return (BUS_PROBE_GENERIC); 145 } 146 147 static int 148 simplebus_attach(device_t dev) 149 { 150 device_t dev_child; 151 struct simplebus_devinfo *di; 152 struct simplebus_softc *sc; 153 phandle_t dt_node, dt_child; 154 155 sc = device_get_softc(dev); 156 157 /* 158 * Walk simple-bus and add direct subordinates as our children. 159 */ 160 dt_node = ofw_bus_get_node(dev); 161 for (dt_child = OF_child(dt_node); dt_child != 0; 162 dt_child = OF_peer(dt_child)) { 163 164 /* Check and process 'status' property. */ 165 if (!(fdt_is_enabled(dt_child))) 166 continue; 167 168 if (!(fdt_pm_is_enabled(dt_child))) 169 continue; 170 171 di = malloc(sizeof(*di), M_SIMPLEBUS, M_WAITOK | M_ZERO); 172 173 if (ofw_bus_gen_setup_devinfo(&di->di_ofw, dt_child) != 0) { 174 free(di, M_SIMPLEBUS); 175 device_printf(dev, "could not set up devinfo\n"); 176 continue; 177 } 178 179 resource_list_init(&di->di_res); 180 if (fdt_reg_to_rl(dt_child, &di->di_res)) { 181 device_printf(dev, 182 "%s: could not process 'reg' " 183 "property\n", di->di_ofw.obd_name); 184 ofw_bus_gen_destroy_devinfo(&di->di_ofw); 185 free(di, M_SIMPLEBUS); 186 continue; 187 } 188 189 if (fdt_intr_to_rl(dt_child, &di->di_res, di->di_intr_sl)) { 190 device_printf(dev, "%s: could not process " 191 "'interrupts' property\n", di->di_ofw.obd_name); 192 resource_list_free(&di->di_res); 193 ofw_bus_gen_destroy_devinfo(&di->di_ofw); 194 free(di, M_SIMPLEBUS); 195 continue; 196 } 197 198 /* Add newbus device for this FDT node */ 199 dev_child = device_add_child(dev, NULL, -1); 200 if (dev_child == NULL) { 201 device_printf(dev, "could not add child: %s\n", 202 di->di_ofw.obd_name); 203 resource_list_free(&di->di_res); 204 ofw_bus_gen_destroy_devinfo(&di->di_ofw); 205 free(di, M_SIMPLEBUS); 206 continue; 207 } 208 #ifdef DEBUG 209 device_printf(dev, "added child: %s\n\n", di->di_ofw.obd_name); 210 #endif 211 device_set_ivars(dev_child, di); 212 } 213 214 return (bus_generic_attach(dev)); 215 } 216 217 static int 218 simplebus_print_child(device_t dev, device_t child) 219 { 220 struct simplebus_devinfo *di; 221 struct resource_list *rl; 222 int rv; 223 224 di = device_get_ivars(child); 225 rl = &di->di_res; 226 227 rv = 0; 228 rv += bus_print_child_header(dev, child); 229 rv += resource_list_print_type(rl, "mem", SYS_RES_MEMORY, "%#lx"); 230 rv += resource_list_print_type(rl, "irq", SYS_RES_IRQ, "%ld"); 231 rv += bus_print_child_footer(dev, child); 232 233 return (rv); 234 } 235 236 static struct resource * 237 simplebus_alloc_resource(device_t bus, device_t child, int type, int *rid, 238 u_long start, u_long end, u_long count, u_int flags) 239 { 240 struct simplebus_devinfo *di; 241 struct resource_list_entry *rle; 242 243 /* 244 * Request for the default allocation with a given rid: use resource 245 * list stored in the local device info. 246 */ 247 if ((start == 0UL) && (end == ~0UL)) { 248 if ((di = device_get_ivars(child)) == NULL) 249 return (NULL); 250 251 if (type == SYS_RES_IOPORT) 252 type = SYS_RES_MEMORY; 253 254 rle = resource_list_find(&di->di_res, type, *rid); 255 if (rle == NULL) { 256 if (bootverbose) 257 device_printf(bus, "no default resources for " 258 "rid = %d, type = %d\n", *rid, type); 259 return (NULL); 260 } 261 start = rle->start; 262 end = rle->end; 263 count = rle->count; 264 } 265 266 return (bus_generic_alloc_resource(bus, child, type, rid, start, end, 267 count, flags)); 268 } 269 270 static struct resource_list * 271 simplebus_get_resource_list(device_t bus, device_t child) 272 { 273 struct simplebus_devinfo *di; 274 275 di = device_get_ivars(child); 276 return (&di->di_res); 277 } 278 279 static int 280 simplebus_setup_intr(device_t bus, device_t child, struct resource *res, 281 int flags, driver_filter_t *filter, driver_intr_t *ihand, void *arg, 282 void **cookiep) 283 { 284 struct simplebus_devinfo *di; 285 enum intr_trigger trig; 286 enum intr_polarity pol; 287 int error, rid; 288 289 di = device_get_ivars(child); 290 if (di == NULL) 291 return (ENXIO); 292 293 if (res == NULL) 294 return (EINVAL); 295 296 rid = rman_get_rid(res); 297 if (rid >= DI_MAX_INTR_NUM) 298 return (ENOENT); 299 300 trig = di->di_intr_sl[rid].trig; 301 pol = di->di_intr_sl[rid].pol; 302 if (trig != INTR_TRIGGER_CONFORM || pol != INTR_POLARITY_CONFORM) { 303 error = bus_generic_config_intr(bus, rman_get_start(res), 304 trig, pol); 305 if (error) 306 return (error); 307 } 308 309 error = bus_generic_setup_intr(bus, child, res, flags, filter, ihand, 310 arg, cookiep); 311 return (error); 312 } 313 314 static const struct ofw_bus_devinfo * 315 simplebus_get_devinfo(device_t bus, device_t child) 316 { 317 struct simplebus_devinfo *di; 318 319 di = device_get_ivars(child); 320 return (&di->di_ofw); 321 } 322