1 /* 2 * Broadcom specific AMBA 3 * Bus subsystem 4 * 5 * Licensed under the GNU/GPL. See COPYING for details. 6 */ 7 8 #include "bcma_private.h" 9 #include <linux/module.h> 10 #include <linux/bcma/bcma.h> 11 #include <linux/slab.h> 12 13 MODULE_DESCRIPTION("Broadcom's specific AMBA driver"); 14 MODULE_LICENSE("GPL"); 15 16 /* contains the number the next bus should get. */ 17 static unsigned int bcma_bus_next_num = 0; 18 19 /* bcma_buses_mutex locks the bcma_bus_next_num */ 20 static DEFINE_MUTEX(bcma_buses_mutex); 21 22 static int bcma_bus_match(struct device *dev, struct device_driver *drv); 23 static int bcma_device_probe(struct device *dev); 24 static int bcma_device_remove(struct device *dev); 25 static int bcma_device_uevent(struct device *dev, struct kobj_uevent_env *env); 26 27 static ssize_t manuf_show(struct device *dev, struct device_attribute *attr, char *buf) 28 { 29 struct bcma_device *core = container_of(dev, struct bcma_device, dev); 30 return sprintf(buf, "0x%03X\n", core->id.manuf); 31 } 32 static ssize_t id_show(struct device *dev, struct device_attribute *attr, char *buf) 33 { 34 struct bcma_device *core = container_of(dev, struct bcma_device, dev); 35 return sprintf(buf, "0x%03X\n", core->id.id); 36 } 37 static ssize_t rev_show(struct device *dev, struct device_attribute *attr, char *buf) 38 { 39 struct bcma_device *core = container_of(dev, struct bcma_device, dev); 40 return sprintf(buf, "0x%02X\n", core->id.rev); 41 } 42 static ssize_t class_show(struct device *dev, struct device_attribute *attr, char *buf) 43 { 44 struct bcma_device *core = container_of(dev, struct bcma_device, dev); 45 return sprintf(buf, "0x%X\n", core->id.class); 46 } 47 static struct device_attribute bcma_device_attrs[] = { 48 __ATTR_RO(manuf), 49 __ATTR_RO(id), 50 __ATTR_RO(rev), 51 __ATTR_RO(class), 52 __ATTR_NULL, 53 }; 54 55 static struct bus_type bcma_bus_type = { 56 .name = "bcma", 57 .match = bcma_bus_match, 58 .probe = bcma_device_probe, 59 .remove = bcma_device_remove, 60 .uevent = bcma_device_uevent, 61 .dev_attrs = bcma_device_attrs, 62 }; 63 64 static u16 bcma_cc_core_id(struct bcma_bus *bus) 65 { 66 if (bus->chipinfo.id == BCMA_CHIP_ID_BCM4706) 67 return BCMA_CORE_4706_CHIPCOMMON; 68 return BCMA_CORE_CHIPCOMMON; 69 } 70 71 struct bcma_device *bcma_find_core(struct bcma_bus *bus, u16 coreid) 72 { 73 struct bcma_device *core; 74 75 list_for_each_entry(core, &bus->cores, list) { 76 if (core->id.id == coreid) 77 return core; 78 } 79 return NULL; 80 } 81 EXPORT_SYMBOL_GPL(bcma_find_core); 82 83 static void bcma_release_core_dev(struct device *dev) 84 { 85 struct bcma_device *core = container_of(dev, struct bcma_device, dev); 86 if (core->io_addr) 87 iounmap(core->io_addr); 88 if (core->io_wrap) 89 iounmap(core->io_wrap); 90 kfree(core); 91 } 92 93 static int bcma_register_cores(struct bcma_bus *bus) 94 { 95 struct bcma_device *core; 96 int err, dev_id = 0; 97 98 list_for_each_entry(core, &bus->cores, list) { 99 /* We support that cores ourself */ 100 switch (core->id.id) { 101 case BCMA_CORE_4706_CHIPCOMMON: 102 case BCMA_CORE_CHIPCOMMON: 103 case BCMA_CORE_PCI: 104 case BCMA_CORE_PCIE: 105 case BCMA_CORE_MIPS_74K: 106 case BCMA_CORE_4706_MAC_GBIT_COMMON: 107 continue; 108 } 109 110 core->dev.release = bcma_release_core_dev; 111 core->dev.bus = &bcma_bus_type; 112 dev_set_name(&core->dev, "bcma%d:%d", bus->num, dev_id); 113 114 switch (bus->hosttype) { 115 case BCMA_HOSTTYPE_PCI: 116 core->dev.parent = &bus->host_pci->dev; 117 core->dma_dev = &bus->host_pci->dev; 118 core->irq = bus->host_pci->irq; 119 break; 120 case BCMA_HOSTTYPE_SOC: 121 core->dev.dma_mask = &core->dev.coherent_dma_mask; 122 core->dma_dev = &core->dev; 123 break; 124 case BCMA_HOSTTYPE_SDIO: 125 break; 126 } 127 128 err = device_register(&core->dev); 129 if (err) { 130 bcma_err(bus, 131 "Could not register dev for core 0x%03X\n", 132 core->id.id); 133 continue; 134 } 135 core->dev_registered = true; 136 dev_id++; 137 } 138 139 return 0; 140 } 141 142 static void bcma_unregister_cores(struct bcma_bus *bus) 143 { 144 struct bcma_device *core; 145 146 list_for_each_entry(core, &bus->cores, list) { 147 if (core->dev_registered) 148 device_unregister(&core->dev); 149 } 150 } 151 152 int __devinit bcma_bus_register(struct bcma_bus *bus) 153 { 154 int err; 155 struct bcma_device *core; 156 157 mutex_lock(&bcma_buses_mutex); 158 bus->num = bcma_bus_next_num++; 159 mutex_unlock(&bcma_buses_mutex); 160 161 /* Scan for devices (cores) */ 162 err = bcma_bus_scan(bus); 163 if (err) { 164 bcma_err(bus, "Failed to scan: %d\n", err); 165 return -1; 166 } 167 168 /* Init CC core */ 169 core = bcma_find_core(bus, bcma_cc_core_id(bus)); 170 if (core) { 171 bus->drv_cc.core = core; 172 bcma_core_chipcommon_init(&bus->drv_cc); 173 } 174 175 /* Init MIPS core */ 176 core = bcma_find_core(bus, BCMA_CORE_MIPS_74K); 177 if (core) { 178 bus->drv_mips.core = core; 179 bcma_core_mips_init(&bus->drv_mips); 180 } 181 182 /* Init PCIE core */ 183 core = bcma_find_core(bus, BCMA_CORE_PCIE); 184 if (core) { 185 bus->drv_pci.core = core; 186 bcma_core_pci_init(&bus->drv_pci); 187 } 188 189 /* Init GBIT MAC COMMON core */ 190 core = bcma_find_core(bus, BCMA_CORE_4706_MAC_GBIT_COMMON); 191 if (core) { 192 bus->drv_gmac_cmn.core = core; 193 bcma_core_gmac_cmn_init(&bus->drv_gmac_cmn); 194 } 195 196 /* Try to get SPROM */ 197 err = bcma_sprom_get(bus); 198 if (err == -ENOENT) { 199 bcma_err(bus, "No SPROM available\n"); 200 } else if (err) 201 bcma_err(bus, "Failed to get SPROM: %d\n", err); 202 203 /* Register found cores */ 204 bcma_register_cores(bus); 205 206 bcma_info(bus, "Bus registered\n"); 207 208 return 0; 209 } 210 211 void bcma_bus_unregister(struct bcma_bus *bus) 212 { 213 bcma_unregister_cores(bus); 214 } 215 216 int __init bcma_bus_early_register(struct bcma_bus *bus, 217 struct bcma_device *core_cc, 218 struct bcma_device *core_mips) 219 { 220 int err; 221 struct bcma_device *core; 222 struct bcma_device_id match; 223 224 bcma_init_bus(bus); 225 226 match.manuf = BCMA_MANUF_BCM; 227 match.id = bcma_cc_core_id(bus); 228 match.class = BCMA_CL_SIM; 229 match.rev = BCMA_ANY_REV; 230 231 /* Scan for chip common core */ 232 err = bcma_bus_scan_early(bus, &match, core_cc); 233 if (err) { 234 bcma_err(bus, "Failed to scan for common core: %d\n", err); 235 return -1; 236 } 237 238 match.manuf = BCMA_MANUF_MIPS; 239 match.id = BCMA_CORE_MIPS_74K; 240 match.class = BCMA_CL_SIM; 241 match.rev = BCMA_ANY_REV; 242 243 /* Scan for mips core */ 244 err = bcma_bus_scan_early(bus, &match, core_mips); 245 if (err) { 246 bcma_err(bus, "Failed to scan for mips core: %d\n", err); 247 return -1; 248 } 249 250 /* Init CC core */ 251 core = bcma_find_core(bus, bcma_cc_core_id(bus)); 252 if (core) { 253 bus->drv_cc.core = core; 254 bcma_core_chipcommon_init(&bus->drv_cc); 255 } 256 257 /* Init MIPS core */ 258 core = bcma_find_core(bus, BCMA_CORE_MIPS_74K); 259 if (core) { 260 bus->drv_mips.core = core; 261 bcma_core_mips_init(&bus->drv_mips); 262 } 263 264 bcma_info(bus, "Early bus registered\n"); 265 266 return 0; 267 } 268 269 #ifdef CONFIG_PM 270 int bcma_bus_suspend(struct bcma_bus *bus) 271 { 272 struct bcma_device *core; 273 274 list_for_each_entry(core, &bus->cores, list) { 275 struct device_driver *drv = core->dev.driver; 276 if (drv) { 277 struct bcma_driver *adrv = container_of(drv, struct bcma_driver, drv); 278 if (adrv->suspend) 279 adrv->suspend(core); 280 } 281 } 282 return 0; 283 } 284 285 int bcma_bus_resume(struct bcma_bus *bus) 286 { 287 struct bcma_device *core; 288 289 /* Init CC core */ 290 if (bus->drv_cc.core) { 291 bus->drv_cc.setup_done = false; 292 bcma_core_chipcommon_init(&bus->drv_cc); 293 } 294 295 list_for_each_entry(core, &bus->cores, list) { 296 struct device_driver *drv = core->dev.driver; 297 if (drv) { 298 struct bcma_driver *adrv = container_of(drv, struct bcma_driver, drv); 299 if (adrv->resume) 300 adrv->resume(core); 301 } 302 } 303 304 return 0; 305 } 306 #endif 307 308 int __bcma_driver_register(struct bcma_driver *drv, struct module *owner) 309 { 310 drv->drv.name = drv->name; 311 drv->drv.bus = &bcma_bus_type; 312 drv->drv.owner = owner; 313 314 return driver_register(&drv->drv); 315 } 316 EXPORT_SYMBOL_GPL(__bcma_driver_register); 317 318 void bcma_driver_unregister(struct bcma_driver *drv) 319 { 320 driver_unregister(&drv->drv); 321 } 322 EXPORT_SYMBOL_GPL(bcma_driver_unregister); 323 324 static int bcma_bus_match(struct device *dev, struct device_driver *drv) 325 { 326 struct bcma_device *core = container_of(dev, struct bcma_device, dev); 327 struct bcma_driver *adrv = container_of(drv, struct bcma_driver, drv); 328 const struct bcma_device_id *cid = &core->id; 329 const struct bcma_device_id *did; 330 331 for (did = adrv->id_table; did->manuf || did->id || did->rev; did++) { 332 if ((did->manuf == cid->manuf || did->manuf == BCMA_ANY_MANUF) && 333 (did->id == cid->id || did->id == BCMA_ANY_ID) && 334 (did->rev == cid->rev || did->rev == BCMA_ANY_REV) && 335 (did->class == cid->class || did->class == BCMA_ANY_CLASS)) 336 return 1; 337 } 338 return 0; 339 } 340 341 static int bcma_device_probe(struct device *dev) 342 { 343 struct bcma_device *core = container_of(dev, struct bcma_device, dev); 344 struct bcma_driver *adrv = container_of(dev->driver, struct bcma_driver, 345 drv); 346 int err = 0; 347 348 if (adrv->probe) 349 err = adrv->probe(core); 350 351 return err; 352 } 353 354 static int bcma_device_remove(struct device *dev) 355 { 356 struct bcma_device *core = container_of(dev, struct bcma_device, dev); 357 struct bcma_driver *adrv = container_of(dev->driver, struct bcma_driver, 358 drv); 359 360 if (adrv->remove) 361 adrv->remove(core); 362 363 return 0; 364 } 365 366 static int bcma_device_uevent(struct device *dev, struct kobj_uevent_env *env) 367 { 368 struct bcma_device *core = container_of(dev, struct bcma_device, dev); 369 370 return add_uevent_var(env, 371 "MODALIAS=bcma:m%04Xid%04Xrev%02Xcl%02X", 372 core->id.manuf, core->id.id, 373 core->id.rev, core->id.class); 374 } 375 376 static int __init bcma_modinit(void) 377 { 378 int err; 379 380 err = bus_register(&bcma_bus_type); 381 if (err) 382 return err; 383 384 #ifdef CONFIG_BCMA_HOST_PCI 385 err = bcma_host_pci_init(); 386 if (err) { 387 pr_err("PCI host initialization failed\n"); 388 err = 0; 389 } 390 #endif 391 392 return err; 393 } 394 fs_initcall(bcma_modinit); 395 396 static void __exit bcma_modexit(void) 397 { 398 #ifdef CONFIG_BCMA_HOST_PCI 399 bcma_host_pci_exit(); 400 #endif 401 bus_unregister(&bcma_bus_type); 402 } 403 module_exit(bcma_modexit) 404