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