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