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 kfree(core); 72 } 73 74 static int bcma_register_cores(struct bcma_bus *bus) 75 { 76 struct bcma_device *core; 77 int err, dev_id = 0; 78 79 list_for_each_entry(core, &bus->cores, list) { 80 /* We support that cores ourself */ 81 switch (core->id.id) { 82 case BCMA_CORE_CHIPCOMMON: 83 case BCMA_CORE_PCI: 84 case BCMA_CORE_PCIE: 85 continue; 86 } 87 88 core->dev.release = bcma_release_core_dev; 89 core->dev.bus = &bcma_bus_type; 90 dev_set_name(&core->dev, "bcma%d:%d", 0/*bus->num*/, dev_id); 91 92 switch (bus->hosttype) { 93 case BCMA_HOSTTYPE_PCI: 94 core->dev.parent = &bus->host_pci->dev; 95 core->dma_dev = &bus->host_pci->dev; 96 core->irq = bus->host_pci->irq; 97 break; 98 case BCMA_HOSTTYPE_NONE: 99 case BCMA_HOSTTYPE_SDIO: 100 break; 101 } 102 103 err = device_register(&core->dev); 104 if (err) { 105 pr_err("Could not register dev for core 0x%03X\n", 106 core->id.id); 107 continue; 108 } 109 core->dev_registered = true; 110 dev_id++; 111 } 112 113 return 0; 114 } 115 116 static void bcma_unregister_cores(struct bcma_bus *bus) 117 { 118 struct bcma_device *core; 119 120 list_for_each_entry(core, &bus->cores, list) { 121 if (core->dev_registered) 122 device_unregister(&core->dev); 123 } 124 } 125 126 int bcma_bus_register(struct bcma_bus *bus) 127 { 128 int err; 129 struct bcma_device *core; 130 131 /* Scan for devices (cores) */ 132 err = bcma_bus_scan(bus); 133 if (err) { 134 pr_err("Failed to scan: %d\n", err); 135 return -1; 136 } 137 138 /* Init CC core */ 139 core = bcma_find_core(bus, BCMA_CORE_CHIPCOMMON); 140 if (core) { 141 bus->drv_cc.core = core; 142 bcma_core_chipcommon_init(&bus->drv_cc); 143 } 144 145 /* Init PCIE core */ 146 core = bcma_find_core(bus, BCMA_CORE_PCIE); 147 if (core) { 148 bus->drv_pci.core = core; 149 bcma_core_pci_init(&bus->drv_pci); 150 } 151 152 /* Try to get SPROM */ 153 err = bcma_sprom_get(bus); 154 if (err == -ENOENT) { 155 pr_err("No SPROM available\n"); 156 } else if (err) { 157 pr_err("Failed to get SPROM: %d\n", err); 158 return -ENOENT; 159 } 160 161 /* Register found cores */ 162 bcma_register_cores(bus); 163 164 pr_info("Bus registered\n"); 165 166 return 0; 167 } 168 169 void bcma_bus_unregister(struct bcma_bus *bus) 170 { 171 bcma_unregister_cores(bus); 172 } 173 174 int __bcma_driver_register(struct bcma_driver *drv, struct module *owner) 175 { 176 drv->drv.name = drv->name; 177 drv->drv.bus = &bcma_bus_type; 178 drv->drv.owner = owner; 179 180 return driver_register(&drv->drv); 181 } 182 EXPORT_SYMBOL_GPL(__bcma_driver_register); 183 184 void bcma_driver_unregister(struct bcma_driver *drv) 185 { 186 driver_unregister(&drv->drv); 187 } 188 EXPORT_SYMBOL_GPL(bcma_driver_unregister); 189 190 static int bcma_bus_match(struct device *dev, struct device_driver *drv) 191 { 192 struct bcma_device *core = container_of(dev, struct bcma_device, dev); 193 struct bcma_driver *adrv = container_of(drv, struct bcma_driver, drv); 194 const struct bcma_device_id *cid = &core->id; 195 const struct bcma_device_id *did; 196 197 for (did = adrv->id_table; did->manuf || did->id || did->rev; did++) { 198 if ((did->manuf == cid->manuf || did->manuf == BCMA_ANY_MANUF) && 199 (did->id == cid->id || did->id == BCMA_ANY_ID) && 200 (did->rev == cid->rev || did->rev == BCMA_ANY_REV) && 201 (did->class == cid->class || did->class == BCMA_ANY_CLASS)) 202 return 1; 203 } 204 return 0; 205 } 206 207 static int bcma_device_probe(struct device *dev) 208 { 209 struct bcma_device *core = container_of(dev, struct bcma_device, dev); 210 struct bcma_driver *adrv = container_of(dev->driver, struct bcma_driver, 211 drv); 212 int err = 0; 213 214 if (adrv->probe) 215 err = adrv->probe(core); 216 217 return err; 218 } 219 220 static int bcma_device_remove(struct device *dev) 221 { 222 struct bcma_device *core = container_of(dev, struct bcma_device, dev); 223 struct bcma_driver *adrv = container_of(dev->driver, struct bcma_driver, 224 drv); 225 226 if (adrv->remove) 227 adrv->remove(core); 228 229 return 0; 230 } 231 232 static int bcma_device_uevent(struct device *dev, struct kobj_uevent_env *env) 233 { 234 struct bcma_device *core = container_of(dev, struct bcma_device, dev); 235 236 return add_uevent_var(env, 237 "MODALIAS=bcma:m%04Xid%04Xrev%02Xcl%02X", 238 core->id.manuf, core->id.id, 239 core->id.rev, core->id.class); 240 } 241 242 static int __init bcma_modinit(void) 243 { 244 int err; 245 246 err = bus_register(&bcma_bus_type); 247 if (err) 248 return err; 249 250 #ifdef CONFIG_BCMA_HOST_PCI 251 err = bcma_host_pci_init(); 252 if (err) { 253 pr_err("PCI host initialization failed\n"); 254 err = 0; 255 } 256 #endif 257 258 return err; 259 } 260 fs_initcall(bcma_modinit); 261 262 static void __exit bcma_modexit(void) 263 { 264 #ifdef CONFIG_BCMA_HOST_PCI 265 bcma_host_pci_exit(); 266 #endif 267 bus_unregister(&bcma_bus_type); 268 } 269 module_exit(bcma_modexit) 270