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/platform_device.h> 11 #include <linux/bcma/bcma.h> 12 #include <linux/slab.h> 13 14 MODULE_DESCRIPTION("Broadcom's specific AMBA driver"); 15 MODULE_LICENSE("GPL"); 16 17 /* contains the number the next bus should get. */ 18 static unsigned int bcma_bus_next_num = 0; 19 20 /* bcma_buses_mutex locks the bcma_bus_next_num */ 21 static DEFINE_MUTEX(bcma_buses_mutex); 22 23 static int bcma_bus_match(struct device *dev, struct device_driver *drv); 24 static int bcma_device_probe(struct device *dev); 25 static int bcma_device_remove(struct device *dev); 26 static int bcma_device_uevent(struct device *dev, struct kobj_uevent_env *env); 27 28 static ssize_t manuf_show(struct device *dev, struct device_attribute *attr, char *buf) 29 { 30 struct bcma_device *core = container_of(dev, struct bcma_device, dev); 31 return sprintf(buf, "0x%03X\n", core->id.manuf); 32 } 33 static ssize_t id_show(struct device *dev, struct device_attribute *attr, char *buf) 34 { 35 struct bcma_device *core = container_of(dev, struct bcma_device, dev); 36 return sprintf(buf, "0x%03X\n", core->id.id); 37 } 38 static ssize_t rev_show(struct device *dev, struct device_attribute *attr, char *buf) 39 { 40 struct bcma_device *core = container_of(dev, struct bcma_device, dev); 41 return sprintf(buf, "0x%02X\n", core->id.rev); 42 } 43 static ssize_t class_show(struct device *dev, struct device_attribute *attr, char *buf) 44 { 45 struct bcma_device *core = container_of(dev, struct bcma_device, dev); 46 return sprintf(buf, "0x%X\n", core->id.class); 47 } 48 static struct device_attribute bcma_device_attrs[] = { 49 __ATTR_RO(manuf), 50 __ATTR_RO(id), 51 __ATTR_RO(rev), 52 __ATTR_RO(class), 53 __ATTR_NULL, 54 }; 55 56 static struct bus_type bcma_bus_type = { 57 .name = "bcma", 58 .match = bcma_bus_match, 59 .probe = bcma_device_probe, 60 .remove = bcma_device_remove, 61 .uevent = bcma_device_uevent, 62 .dev_attrs = bcma_device_attrs, 63 }; 64 65 static u16 bcma_cc_core_id(struct bcma_bus *bus) 66 { 67 if (bus->chipinfo.id == BCMA_CHIP_ID_BCM4706) 68 return BCMA_CORE_4706_CHIPCOMMON; 69 return BCMA_CORE_CHIPCOMMON; 70 } 71 72 struct bcma_device *bcma_find_core(struct bcma_bus *bus, u16 coreid) 73 { 74 struct bcma_device *core; 75 76 list_for_each_entry(core, &bus->cores, list) { 77 if (core->id.id == coreid) 78 return core; 79 } 80 return NULL; 81 } 82 EXPORT_SYMBOL_GPL(bcma_find_core); 83 84 static void bcma_release_core_dev(struct device *dev) 85 { 86 struct bcma_device *core = container_of(dev, struct bcma_device, dev); 87 if (core->io_addr) 88 iounmap(core->io_addr); 89 if (core->io_wrap) 90 iounmap(core->io_wrap); 91 kfree(core); 92 } 93 94 static int bcma_register_cores(struct bcma_bus *bus) 95 { 96 struct bcma_device *core; 97 int err, dev_id = 0; 98 99 list_for_each_entry(core, &bus->cores, list) { 100 /* We support that cores ourself */ 101 switch (core->id.id) { 102 case BCMA_CORE_4706_CHIPCOMMON: 103 case BCMA_CORE_CHIPCOMMON: 104 case BCMA_CORE_PCI: 105 case BCMA_CORE_PCIE: 106 case BCMA_CORE_MIPS_74K: 107 case BCMA_CORE_4706_MAC_GBIT_COMMON: 108 continue; 109 } 110 111 core->dev.release = bcma_release_core_dev; 112 core->dev.bus = &bcma_bus_type; 113 dev_set_name(&core->dev, "bcma%d:%d", bus->num, dev_id); 114 115 switch (bus->hosttype) { 116 case BCMA_HOSTTYPE_PCI: 117 core->dev.parent = &bus->host_pci->dev; 118 core->dma_dev = &bus->host_pci->dev; 119 core->irq = bus->host_pci->irq; 120 break; 121 case BCMA_HOSTTYPE_SOC: 122 core->dev.dma_mask = &core->dev.coherent_dma_mask; 123 core->dma_dev = &core->dev; 124 break; 125 case BCMA_HOSTTYPE_SDIO: 126 break; 127 } 128 129 err = device_register(&core->dev); 130 if (err) { 131 bcma_err(bus, 132 "Could not register dev for core 0x%03X\n", 133 core->id.id); 134 continue; 135 } 136 core->dev_registered = true; 137 dev_id++; 138 } 139 140 #ifdef CONFIG_BCMA_SFLASH 141 if (bus->drv_cc.sflash.present) { 142 err = platform_device_register(&bcma_sflash_dev); 143 if (err) 144 bcma_err(bus, "Error registering serial flash\n"); 145 } 146 #endif 147 148 #ifdef CONFIG_BCMA_NFLASH 149 if (bus->drv_cc.nflash.present) { 150 err = platform_device_register(&bcma_nflash_dev); 151 if (err) 152 bcma_err(bus, "Error registering NAND flash\n"); 153 } 154 #endif 155 156 return 0; 157 } 158 159 static void bcma_unregister_cores(struct bcma_bus *bus) 160 { 161 struct bcma_device *core; 162 163 list_for_each_entry(core, &bus->cores, list) { 164 if (core->dev_registered) 165 device_unregister(&core->dev); 166 } 167 } 168 169 int __devinit bcma_bus_register(struct bcma_bus *bus) 170 { 171 int err; 172 struct bcma_device *core; 173 174 mutex_lock(&bcma_buses_mutex); 175 bus->num = bcma_bus_next_num++; 176 mutex_unlock(&bcma_buses_mutex); 177 178 /* Scan for devices (cores) */ 179 err = bcma_bus_scan(bus); 180 if (err) { 181 bcma_err(bus, "Failed to scan: %d\n", err); 182 return -1; 183 } 184 185 /* Init CC core */ 186 core = bcma_find_core(bus, bcma_cc_core_id(bus)); 187 if (core) { 188 bus->drv_cc.core = core; 189 bcma_core_chipcommon_init(&bus->drv_cc); 190 } 191 192 /* Init MIPS core */ 193 core = bcma_find_core(bus, BCMA_CORE_MIPS_74K); 194 if (core) { 195 bus->drv_mips.core = core; 196 bcma_core_mips_init(&bus->drv_mips); 197 } 198 199 /* Init PCIE core */ 200 core = bcma_find_core(bus, BCMA_CORE_PCIE); 201 if (core) { 202 bus->drv_pci.core = core; 203 bcma_core_pci_init(&bus->drv_pci); 204 } 205 206 /* Init GBIT MAC COMMON core */ 207 core = bcma_find_core(bus, BCMA_CORE_4706_MAC_GBIT_COMMON); 208 if (core) { 209 bus->drv_gmac_cmn.core = core; 210 bcma_core_gmac_cmn_init(&bus->drv_gmac_cmn); 211 } 212 213 /* Try to get SPROM */ 214 err = bcma_sprom_get(bus); 215 if (err == -ENOENT) { 216 bcma_err(bus, "No SPROM available\n"); 217 } else if (err) 218 bcma_err(bus, "Failed to get SPROM: %d\n", err); 219 220 /* Register found cores */ 221 bcma_register_cores(bus); 222 223 bcma_info(bus, "Bus registered\n"); 224 225 return 0; 226 } 227 228 void bcma_bus_unregister(struct bcma_bus *bus) 229 { 230 struct bcma_device *cores[3]; 231 232 cores[0] = bcma_find_core(bus, BCMA_CORE_MIPS_74K); 233 cores[1] = bcma_find_core(bus, BCMA_CORE_PCIE); 234 cores[2] = bcma_find_core(bus, BCMA_CORE_4706_MAC_GBIT_COMMON); 235 236 bcma_unregister_cores(bus); 237 238 kfree(cores[2]); 239 kfree(cores[1]); 240 kfree(cores[0]); 241 } 242 243 int __init bcma_bus_early_register(struct bcma_bus *bus, 244 struct bcma_device *core_cc, 245 struct bcma_device *core_mips) 246 { 247 int err; 248 struct bcma_device *core; 249 struct bcma_device_id match; 250 251 bcma_init_bus(bus); 252 253 match.manuf = BCMA_MANUF_BCM; 254 match.id = bcma_cc_core_id(bus); 255 match.class = BCMA_CL_SIM; 256 match.rev = BCMA_ANY_REV; 257 258 /* Scan for chip common core */ 259 err = bcma_bus_scan_early(bus, &match, core_cc); 260 if (err) { 261 bcma_err(bus, "Failed to scan for common core: %d\n", err); 262 return -1; 263 } 264 265 match.manuf = BCMA_MANUF_MIPS; 266 match.id = BCMA_CORE_MIPS_74K; 267 match.class = BCMA_CL_SIM; 268 match.rev = BCMA_ANY_REV; 269 270 /* Scan for mips core */ 271 err = bcma_bus_scan_early(bus, &match, core_mips); 272 if (err) { 273 bcma_err(bus, "Failed to scan for mips core: %d\n", err); 274 return -1; 275 } 276 277 /* Init CC core */ 278 core = bcma_find_core(bus, bcma_cc_core_id(bus)); 279 if (core) { 280 bus->drv_cc.core = core; 281 bcma_core_chipcommon_init(&bus->drv_cc); 282 } 283 284 /* Init MIPS core */ 285 core = bcma_find_core(bus, BCMA_CORE_MIPS_74K); 286 if (core) { 287 bus->drv_mips.core = core; 288 bcma_core_mips_init(&bus->drv_mips); 289 } 290 291 bcma_info(bus, "Early bus registered\n"); 292 293 return 0; 294 } 295 296 #ifdef CONFIG_PM 297 int bcma_bus_suspend(struct bcma_bus *bus) 298 { 299 struct bcma_device *core; 300 301 list_for_each_entry(core, &bus->cores, list) { 302 struct device_driver *drv = core->dev.driver; 303 if (drv) { 304 struct bcma_driver *adrv = container_of(drv, struct bcma_driver, drv); 305 if (adrv->suspend) 306 adrv->suspend(core); 307 } 308 } 309 return 0; 310 } 311 312 int bcma_bus_resume(struct bcma_bus *bus) 313 { 314 struct bcma_device *core; 315 316 /* Init CC core */ 317 if (bus->drv_cc.core) { 318 bus->drv_cc.setup_done = false; 319 bcma_core_chipcommon_init(&bus->drv_cc); 320 } 321 322 list_for_each_entry(core, &bus->cores, list) { 323 struct device_driver *drv = core->dev.driver; 324 if (drv) { 325 struct bcma_driver *adrv = container_of(drv, struct bcma_driver, drv); 326 if (adrv->resume) 327 adrv->resume(core); 328 } 329 } 330 331 return 0; 332 } 333 #endif 334 335 int __bcma_driver_register(struct bcma_driver *drv, struct module *owner) 336 { 337 drv->drv.name = drv->name; 338 drv->drv.bus = &bcma_bus_type; 339 drv->drv.owner = owner; 340 341 return driver_register(&drv->drv); 342 } 343 EXPORT_SYMBOL_GPL(__bcma_driver_register); 344 345 void bcma_driver_unregister(struct bcma_driver *drv) 346 { 347 driver_unregister(&drv->drv); 348 } 349 EXPORT_SYMBOL_GPL(bcma_driver_unregister); 350 351 static int bcma_bus_match(struct device *dev, struct device_driver *drv) 352 { 353 struct bcma_device *core = container_of(dev, struct bcma_device, dev); 354 struct bcma_driver *adrv = container_of(drv, struct bcma_driver, drv); 355 const struct bcma_device_id *cid = &core->id; 356 const struct bcma_device_id *did; 357 358 for (did = adrv->id_table; did->manuf || did->id || did->rev; did++) { 359 if ((did->manuf == cid->manuf || did->manuf == BCMA_ANY_MANUF) && 360 (did->id == cid->id || did->id == BCMA_ANY_ID) && 361 (did->rev == cid->rev || did->rev == BCMA_ANY_REV) && 362 (did->class == cid->class || did->class == BCMA_ANY_CLASS)) 363 return 1; 364 } 365 return 0; 366 } 367 368 static int bcma_device_probe(struct device *dev) 369 { 370 struct bcma_device *core = container_of(dev, struct bcma_device, dev); 371 struct bcma_driver *adrv = container_of(dev->driver, struct bcma_driver, 372 drv); 373 int err = 0; 374 375 if (adrv->probe) 376 err = adrv->probe(core); 377 378 return err; 379 } 380 381 static int bcma_device_remove(struct device *dev) 382 { 383 struct bcma_device *core = container_of(dev, struct bcma_device, dev); 384 struct bcma_driver *adrv = container_of(dev->driver, struct bcma_driver, 385 drv); 386 387 if (adrv->remove) 388 adrv->remove(core); 389 390 return 0; 391 } 392 393 static int bcma_device_uevent(struct device *dev, struct kobj_uevent_env *env) 394 { 395 struct bcma_device *core = container_of(dev, struct bcma_device, dev); 396 397 return add_uevent_var(env, 398 "MODALIAS=bcma:m%04Xid%04Xrev%02Xcl%02X", 399 core->id.manuf, core->id.id, 400 core->id.rev, core->id.class); 401 } 402 403 static int __init bcma_modinit(void) 404 { 405 int err; 406 407 err = bus_register(&bcma_bus_type); 408 if (err) 409 return err; 410 411 #ifdef CONFIG_BCMA_HOST_PCI 412 err = bcma_host_pci_init(); 413 if (err) { 414 pr_err("PCI host initialization failed\n"); 415 err = 0; 416 } 417 #endif 418 419 return err; 420 } 421 fs_initcall(bcma_modinit); 422 423 static void __exit bcma_modexit(void) 424 { 425 #ifdef CONFIG_BCMA_HOST_PCI 426 bcma_host_pci_exit(); 427 #endif 428 bus_unregister(&bcma_bus_type); 429 } 430 module_exit(bcma_modexit) 431