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 11 MODULE_DESCRIPTION("Broadcom's specific AMBA driver"); 12 MODULE_LICENSE("GPL"); 13 14 static int bcma_bus_match(struct device *dev, struct device_driver *drv); 15 static int bcma_device_probe(struct device *dev); 16 static int bcma_device_remove(struct device *dev); 17 18 static ssize_t manuf_show(struct device *dev, struct device_attribute *attr, char *buf) 19 { 20 struct bcma_device *core = container_of(dev, struct bcma_device, dev); 21 return sprintf(buf, "0x%03X\n", core->id.manuf); 22 } 23 static ssize_t id_show(struct device *dev, struct device_attribute *attr, char *buf) 24 { 25 struct bcma_device *core = container_of(dev, struct bcma_device, dev); 26 return sprintf(buf, "0x%03X\n", core->id.id); 27 } 28 static ssize_t rev_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%02X\n", core->id.rev); 32 } 33 static ssize_t class_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%X\n", core->id.class); 37 } 38 static struct device_attribute bcma_device_attrs[] = { 39 __ATTR_RO(manuf), 40 __ATTR_RO(id), 41 __ATTR_RO(rev), 42 __ATTR_RO(class), 43 __ATTR_NULL, 44 }; 45 46 static struct bus_type bcma_bus_type = { 47 .name = "bcma", 48 .match = bcma_bus_match, 49 .probe = bcma_device_probe, 50 .remove = bcma_device_remove, 51 .dev_attrs = bcma_device_attrs, 52 }; 53 54 static struct bcma_device *bcma_find_core(struct bcma_bus *bus, u16 coreid) 55 { 56 struct bcma_device *core; 57 58 list_for_each_entry(core, &bus->cores, list) { 59 if (core->id.id == coreid) 60 return core; 61 } 62 return NULL; 63 } 64 65 static void bcma_release_core_dev(struct device *dev) 66 { 67 struct bcma_device *core = container_of(dev, struct bcma_device, dev); 68 kfree(core); 69 } 70 71 static int bcma_register_cores(struct bcma_bus *bus) 72 { 73 struct bcma_device *core; 74 int err, dev_id = 0; 75 76 list_for_each_entry(core, &bus->cores, list) { 77 /* We support that cores ourself */ 78 switch (core->id.id) { 79 case BCMA_CORE_CHIPCOMMON: 80 case BCMA_CORE_PCI: 81 case BCMA_CORE_PCIE: 82 continue; 83 } 84 85 core->dev.release = bcma_release_core_dev; 86 core->dev.bus = &bcma_bus_type; 87 dev_set_name(&core->dev, "bcma%d:%d", 0/*bus->num*/, dev_id); 88 89 switch (bus->hosttype) { 90 case BCMA_HOSTTYPE_PCI: 91 core->dev.parent = &bus->host_pci->dev; 92 break; 93 case BCMA_HOSTTYPE_NONE: 94 case BCMA_HOSTTYPE_SDIO: 95 break; 96 } 97 98 err = device_register(&core->dev); 99 if (err) { 100 pr_err("Could not register dev for core 0x%03X\n", 101 core->id.id); 102 continue; 103 } 104 core->dev_registered = true; 105 dev_id++; 106 } 107 108 return 0; 109 } 110 111 static void bcma_unregister_cores(struct bcma_bus *bus) 112 { 113 struct bcma_device *core; 114 115 list_for_each_entry(core, &bus->cores, list) { 116 if (core->dev_registered) 117 device_unregister(&core->dev); 118 } 119 } 120 121 int bcma_bus_register(struct bcma_bus *bus) 122 { 123 int err; 124 struct bcma_device *core; 125 126 /* Scan for devices (cores) */ 127 err = bcma_bus_scan(bus); 128 if (err) { 129 pr_err("Failed to scan: %d\n", err); 130 return -1; 131 } 132 133 /* Init CC core */ 134 core = bcma_find_core(bus, BCMA_CORE_CHIPCOMMON); 135 if (core) { 136 bus->drv_cc.core = core; 137 bcma_core_chipcommon_init(&bus->drv_cc); 138 } 139 140 /* Init PCIE core */ 141 core = bcma_find_core(bus, BCMA_CORE_PCIE); 142 if (core) { 143 bus->drv_pci.core = core; 144 bcma_core_pci_init(&bus->drv_pci); 145 } 146 147 /* Register found cores */ 148 bcma_register_cores(bus); 149 150 pr_info("Bus registered\n"); 151 152 return 0; 153 } 154 EXPORT_SYMBOL_GPL(bcma_bus_register); 155 156 void bcma_bus_unregister(struct bcma_bus *bus) 157 { 158 bcma_unregister_cores(bus); 159 } 160 EXPORT_SYMBOL_GPL(bcma_bus_unregister); 161 162 int __bcma_driver_register(struct bcma_driver *drv, struct module *owner) 163 { 164 drv->drv.name = drv->name; 165 drv->drv.bus = &bcma_bus_type; 166 drv->drv.owner = owner; 167 168 return driver_register(&drv->drv); 169 } 170 EXPORT_SYMBOL_GPL(__bcma_driver_register); 171 172 void bcma_driver_unregister(struct bcma_driver *drv) 173 { 174 driver_unregister(&drv->drv); 175 } 176 EXPORT_SYMBOL_GPL(bcma_driver_unregister); 177 178 static int bcma_bus_match(struct device *dev, struct device_driver *drv) 179 { 180 struct bcma_device *core = container_of(dev, struct bcma_device, dev); 181 struct bcma_driver *adrv = container_of(drv, struct bcma_driver, drv); 182 const struct bcma_device_id *cid = &core->id; 183 const struct bcma_device_id *did; 184 185 for (did = adrv->id_table; did->manuf || did->id || did->rev; did++) { 186 if ((did->manuf == cid->manuf || did->manuf == BCMA_ANY_MANUF) && 187 (did->id == cid->id || did->id == BCMA_ANY_ID) && 188 (did->rev == cid->rev || did->rev == BCMA_ANY_REV) && 189 (did->class == cid->class || did->class == BCMA_ANY_CLASS)) 190 return 1; 191 } 192 return 0; 193 } 194 195 static int bcma_device_probe(struct device *dev) 196 { 197 struct bcma_device *core = container_of(dev, struct bcma_device, dev); 198 struct bcma_driver *adrv = container_of(dev->driver, struct bcma_driver, 199 drv); 200 int err = 0; 201 202 if (adrv->probe) 203 err = adrv->probe(core); 204 205 return err; 206 } 207 208 static int bcma_device_remove(struct device *dev) 209 { 210 struct bcma_device *core = container_of(dev, struct bcma_device, dev); 211 struct bcma_driver *adrv = container_of(dev->driver, struct bcma_driver, 212 drv); 213 214 if (adrv->remove) 215 adrv->remove(core); 216 217 return 0; 218 } 219 220 static int __init bcma_modinit(void) 221 { 222 int err; 223 224 err = bus_register(&bcma_bus_type); 225 if (err) 226 return err; 227 228 #ifdef CONFIG_BCMA_HOST_PCI 229 err = bcma_host_pci_init(); 230 if (err) { 231 pr_err("PCI host initialization failed\n"); 232 err = 0; 233 } 234 #endif 235 236 return err; 237 } 238 fs_initcall(bcma_modinit); 239 240 static void __exit bcma_modexit(void) 241 { 242 #ifdef CONFIG_BCMA_HOST_PCI 243 bcma_host_pci_exit(); 244 #endif 245 bus_unregister(&bcma_bus_type); 246 } 247 module_exit(bcma_modexit) 248