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 #define DEBUG 53 #undef DEBUG 54 55 #ifdef DEBUG 56 #define debugf(fmt, args...) do { printf("%s(): ", __func__); \ 57 printf(fmt,##args); } while (0) 58 #else 59 #define debugf(fmt, args...) 60 #endif 61 62 static MALLOC_DEFINE(M_SIMPLEBUS, "simplebus", "simplebus devices information"); 63 64 struct simplebus_softc { 65 int sc_addr_cells; 66 int sc_size_cells; 67 u_long sc_start_pa; 68 u_long sc_start_va; 69 u_long sc_size; 70 }; 71 72 struct simplebus_devinfo { 73 struct ofw_bus_devinfo di_ofw; 74 struct resource_list di_res; 75 76 /* Interrupts sense-level info for this device */ 77 struct fdt_sense_level di_intr_sl[DI_MAX_INTR_NUM]; 78 }; 79 80 /* 81 * Prototypes. 82 */ 83 static int simplebus_probe(device_t); 84 static int simplebus_attach(device_t); 85 86 static int simplebus_print_child(device_t, device_t); 87 static int simplebus_setup_intr(device_t, device_t, struct resource *, int, 88 driver_filter_t *, driver_intr_t *, void *, void **); 89 90 static struct resource *simplebus_alloc_resource(device_t, device_t, int, 91 int *, u_long, u_long, u_long, u_int); 92 static struct resource_list *simplebus_get_resource_list(device_t, device_t); 93 94 static ofw_bus_get_devinfo_t simplebus_get_devinfo; 95 96 /* 97 * Bus interface definition. 98 */ 99 static device_method_t simplebus_methods[] = { 100 /* Device interface */ 101 DEVMETHOD(device_probe, simplebus_probe), 102 DEVMETHOD(device_attach, simplebus_attach), 103 DEVMETHOD(device_detach, bus_generic_detach), 104 DEVMETHOD(device_shutdown, bus_generic_shutdown), 105 DEVMETHOD(device_suspend, bus_generic_suspend), 106 DEVMETHOD(device_resume, bus_generic_resume), 107 108 /* Bus interface */ 109 DEVMETHOD(bus_print_child, simplebus_print_child), 110 DEVMETHOD(bus_alloc_resource, simplebus_alloc_resource), 111 DEVMETHOD(bus_release_resource, bus_generic_release_resource), 112 DEVMETHOD(bus_activate_resource, bus_generic_activate_resource), 113 DEVMETHOD(bus_deactivate_resource, bus_generic_deactivate_resource), 114 DEVMETHOD(bus_setup_intr, simplebus_setup_intr), 115 DEVMETHOD(bus_teardown_intr, bus_generic_teardown_intr), 116 DEVMETHOD(bus_get_resource_list, simplebus_get_resource_list), 117 118 /* OFW bus interface */ 119 DEVMETHOD(ofw_bus_get_devinfo, simplebus_get_devinfo), 120 DEVMETHOD(ofw_bus_get_compat, ofw_bus_gen_get_compat), 121 DEVMETHOD(ofw_bus_get_model, ofw_bus_gen_get_model), 122 DEVMETHOD(ofw_bus_get_name, ofw_bus_gen_get_name), 123 DEVMETHOD(ofw_bus_get_node, ofw_bus_gen_get_node), 124 DEVMETHOD(ofw_bus_get_type, ofw_bus_gen_get_type), 125 126 { 0, 0 } 127 }; 128 129 static driver_t simplebus_driver = { 130 "simplebus", 131 simplebus_methods, 132 sizeof(struct simplebus_softc) 133 }; 134 135 devclass_t simplebus_devclass; 136 137 DRIVER_MODULE(simplebus, fdtbus, simplebus_driver, simplebus_devclass, 0, 0); 138 139 static int 140 simplebus_probe(device_t dev) 141 { 142 143 if (!ofw_bus_is_compatible_strict(dev, "simple-bus")) 144 return (ENXIO); 145 146 device_set_desc(dev, "Flattened device tree simple bus"); 147 148 return (BUS_PROBE_DEFAULT); 149 } 150 151 static int 152 simplebus_attach(device_t dev) 153 { 154 device_t dev_child; 155 struct simplebus_devinfo *di; 156 struct simplebus_softc *sc; 157 phandle_t dt_node, dt_child; 158 159 sc = device_get_softc(dev); 160 161 sc->sc_start_pa = fdt_immr_pa; 162 sc->sc_start_va = fdt_immr_va; 163 sc->sc_size = fdt_immr_size; 164 165 /* 166 * Walk simple-bus and add direct subordinates as our children. 167 */ 168 dt_node = ofw_bus_get_node(dev); 169 for (dt_child = OF_child(dt_node); dt_child != 0; 170 dt_child = OF_peer(dt_child)) { 171 172 /* Check and process 'status' property. */ 173 if (!(fdt_is_enabled(dt_child))) 174 continue; 175 176 if (!(fdt_pm_is_enabled(dt_child))) 177 continue; 178 179 di = malloc(sizeof(*di), M_SIMPLEBUS, M_WAITOK | M_ZERO); 180 181 if (ofw_bus_gen_setup_devinfo(&di->di_ofw, dt_child) != 0) { 182 free(di, M_SIMPLEBUS); 183 device_printf(dev, "could not set up devinfo\n"); 184 continue; 185 } 186 187 resource_list_init(&di->di_res); 188 189 if (fdt_reg_to_rl(dt_child, &di->di_res, sc->sc_start_va)) { 190 device_printf(dev, "%s: could not process 'reg' " 191 "property\n", di->di_ofw.obd_name); 192 ofw_bus_gen_destroy_devinfo(&di->di_ofw); 193 free(di, M_SIMPLEBUS); 194 continue; 195 } 196 197 if (fdt_intr_to_rl(dt_child, &di->di_res, di->di_intr_sl)) { 198 device_printf(dev, "%s: could not process " 199 "'interrupts' property\n", di->di_ofw.obd_name); 200 resource_list_free(&di->di_res); 201 ofw_bus_gen_destroy_devinfo(&di->di_ofw); 202 free(di, M_SIMPLEBUS); 203 continue; 204 } 205 206 /* Add newbus device for this FDT node */ 207 dev_child = device_add_child(dev, NULL, -1); 208 if (dev_child == NULL) { 209 device_printf(dev, "could not add child: %s\n", 210 di->di_ofw.obd_name); 211 resource_list_free(&di->di_res); 212 ofw_bus_gen_destroy_devinfo(&di->di_ofw); 213 free(di, M_SIMPLEBUS); 214 continue; 215 } 216 #ifdef DEBUG 217 device_printf(dev, "added child: %s\n\n", di->di_ofw.obd_name); 218 #endif 219 device_set_ivars(dev_child, di); 220 } 221 222 return (bus_generic_attach(dev)); 223 } 224 225 static int 226 simplebus_print_child(device_t dev, device_t child) 227 { 228 struct simplebus_devinfo *di; 229 struct resource_list *rl; 230 int rv; 231 232 di = device_get_ivars(child); 233 rl = &di->di_res; 234 235 rv = 0; 236 rv += bus_print_child_header(dev, child); 237 rv += resource_list_print_type(rl, "mem", SYS_RES_MEMORY, "%#lx"); 238 rv += resource_list_print_type(rl, "irq", SYS_RES_IRQ, "%ld"); 239 rv += bus_print_child_footer(dev, child); 240 241 return (rv); 242 } 243 244 static struct resource * 245 simplebus_alloc_resource(device_t bus, device_t child, int type, int *rid, 246 u_long start, u_long end, u_long count, u_int flags) 247 { 248 struct simplebus_devinfo *di; 249 struct resource_list_entry *rle; 250 251 /* 252 * Request for the default allocation with a given rid: use resource 253 * list stored in the local device info. 254 */ 255 if ((start == 0UL) && (end == ~0UL)) { 256 if ((di = device_get_ivars(child)) == NULL) 257 return (NULL); 258 259 if (type == SYS_RES_IOPORT) 260 type = SYS_RES_MEMORY; 261 262 rle = resource_list_find(&di->di_res, type, *rid); 263 if (rle == NULL) { 264 device_printf(bus, "no default resources for " 265 "rid = %d, type = %d\n", *rid, type); 266 return (NULL); 267 } 268 start = rle->start; 269 end = rle->end; 270 count = rle->count; 271 } 272 273 return (bus_generic_alloc_resource(bus, child, type, rid, start, end, 274 count, flags)); 275 } 276 277 static struct resource_list * 278 simplebus_get_resource_list(device_t bus, device_t child) 279 { 280 struct simplebus_devinfo *di; 281 282 di = device_get_ivars(child); 283 return (&di->di_res); 284 } 285 286 static int 287 simplebus_setup_intr(device_t bus, device_t child, struct resource *res, 288 int flags, driver_filter_t *filter, driver_intr_t *ihand, void *arg, 289 void **cookiep) 290 { 291 struct simplebus_devinfo *di; 292 enum intr_trigger trig; 293 enum intr_polarity pol; 294 int irq, rid; 295 296 if (res == NULL) 297 panic("simplebus_setup_intr: NULL irq resource!"); 298 299 rid = rman_get_rid(res); 300 if (rid > DI_MAX_INTR_NUM) { 301 device_printf(child, "rid out of range rid = %d\n", rid); 302 return (ERANGE); 303 } 304 305 irq = rman_get_start(res); 306 307 if ((di = device_get_ivars(child)) == NULL) { 308 device_printf(child, "could not retrieve devinfo\n"); 309 return (ENXIO); 310 } 311 312 trig = di->di_intr_sl[rid].trig; 313 pol = di->di_intr_sl[rid].pol; 314 315 debugf("intr config: irq = %d, trig = %d, pol = %d\n", irq, trig, pol); 316 317 #if defined(__powerpc__) 318 int err; 319 320 err = powerpc_config_intr(irq, trig, pol); 321 if (err) 322 return (err); 323 #endif 324 325 return (bus_generic_setup_intr(bus, child, res, flags, filter, ihand, 326 arg, cookiep)); 327 } 328 329 static const struct ofw_bus_devinfo * 330 simplebus_get_devinfo(device_t bus, device_t child) 331 { 332 struct simplebus_devinfo *di; 333 334 di = device_get_ivars(child); 335 return (&di->di_ofw); 336 } 337