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