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 19 static ssize_t manuf_show(struct device *dev, struct device_attribute *attr, char *buf) 20 { 21 struct bcma_device *core = container_of(dev, struct bcma_device, dev); 22 return sprintf(buf, "0x%03X\n", core->id.manuf); 23 } 24 static ssize_t id_show(struct device *dev, struct device_attribute *attr, char *buf) 25 { 26 struct bcma_device *core = container_of(dev, struct bcma_device, dev); 27 return sprintf(buf, "0x%03X\n", core->id.id); 28 } 29 static ssize_t rev_show(struct device *dev, struct device_attribute *attr, char *buf) 30 { 31 struct bcma_device *core = container_of(dev, struct bcma_device, dev); 32 return sprintf(buf, "0x%02X\n", core->id.rev); 33 } 34 static ssize_t class_show(struct device *dev, struct device_attribute *attr, char *buf) 35 { 36 struct bcma_device *core = container_of(dev, struct bcma_device, dev); 37 return sprintf(buf, "0x%X\n", core->id.class); 38 } 39 static struct device_attribute bcma_device_attrs[] = { 40 __ATTR_RO(manuf), 41 __ATTR_RO(id), 42 __ATTR_RO(rev), 43 __ATTR_RO(class), 44 __ATTR_NULL, 45 }; 46 47 static struct bus_type bcma_bus_type = { 48 .name = "bcma", 49 .match = bcma_bus_match, 50 .probe = bcma_device_probe, 51 .remove = bcma_device_remove, 52 .dev_attrs = bcma_device_attrs, 53 }; 54 55 static struct bcma_device *bcma_find_core(struct bcma_bus *bus, u16 coreid) 56 { 57 struct bcma_device *core; 58 59 list_for_each_entry(core, &bus->cores, list) { 60 if (core->id.id == coreid) 61 return core; 62 } 63 return NULL; 64 } 65 66 static void bcma_release_core_dev(struct device *dev) 67 { 68 struct bcma_device *core = container_of(dev, struct bcma_device, dev); 69 kfree(core); 70 } 71 72 static int bcma_register_cores(struct bcma_bus *bus) 73 { 74 struct bcma_device *core; 75 int err, dev_id = 0; 76 77 list_for_each_entry(core, &bus->cores, list) { 78 /* We support that cores ourself */ 79 switch (core->id.id) { 80 case BCMA_CORE_CHIPCOMMON: 81 case BCMA_CORE_PCI: 82 case BCMA_CORE_PCIE: 83 continue; 84 } 85 86 core->dev.release = bcma_release_core_dev; 87 core->dev.bus = &bcma_bus_type; 88 dev_set_name(&core->dev, "bcma%d:%d", 0/*bus->num*/, dev_id); 89 90 switch (bus->hosttype) { 91 case BCMA_HOSTTYPE_PCI: 92 core->dev.parent = &bus->host_pci->dev; 93 core->dma_dev = &bus->host_pci->dev; 94 core->irq = bus->host_pci->irq; 95 break; 96 case BCMA_HOSTTYPE_NONE: 97 case BCMA_HOSTTYPE_SDIO: 98 break; 99 } 100 101 err = device_register(&core->dev); 102 if (err) { 103 pr_err("Could not register dev for core 0x%03X\n", 104 core->id.id); 105 continue; 106 } 107 core->dev_registered = true; 108 dev_id++; 109 } 110 111 return 0; 112 } 113 114 static void bcma_unregister_cores(struct bcma_bus *bus) 115 { 116 struct bcma_device *core; 117 118 list_for_each_entry(core, &bus->cores, list) { 119 if (core->dev_registered) 120 device_unregister(&core->dev); 121 } 122 } 123 124 int bcma_bus_register(struct bcma_bus *bus) 125 { 126 int err; 127 struct bcma_device *core; 128 129 /* Scan for devices (cores) */ 130 err = bcma_bus_scan(bus); 131 if (err) { 132 pr_err("Failed to scan: %d\n", err); 133 return -1; 134 } 135 136 /* Init CC core */ 137 core = bcma_find_core(bus, BCMA_CORE_CHIPCOMMON); 138 if (core) { 139 bus->drv_cc.core = core; 140 bcma_core_chipcommon_init(&bus->drv_cc); 141 } 142 143 /* Init PCIE core */ 144 core = bcma_find_core(bus, BCMA_CORE_PCIE); 145 if (core) { 146 bus->drv_pci.core = core; 147 bcma_core_pci_init(&bus->drv_pci); 148 } 149 150 /* Try to get SPROM */ 151 err = bcma_sprom_get(bus); 152 if (err == -ENOENT) { 153 pr_err("No SPROM available\n"); 154 } else if (err) { 155 pr_err("Failed to get SPROM: %d\n", err); 156 return -ENOENT; 157 } 158 159 /* Register found cores */ 160 bcma_register_cores(bus); 161 162 pr_info("Bus registered\n"); 163 164 return 0; 165 } 166 167 void bcma_bus_unregister(struct bcma_bus *bus) 168 { 169 bcma_unregister_cores(bus); 170 } 171 172 int __bcma_driver_register(struct bcma_driver *drv, struct module *owner) 173 { 174 drv->drv.name = drv->name; 175 drv->drv.bus = &bcma_bus_type; 176 drv->drv.owner = owner; 177 178 return driver_register(&drv->drv); 179 } 180 EXPORT_SYMBOL_GPL(__bcma_driver_register); 181 182 void bcma_driver_unregister(struct bcma_driver *drv) 183 { 184 driver_unregister(&drv->drv); 185 } 186 EXPORT_SYMBOL_GPL(bcma_driver_unregister); 187 188 static int bcma_bus_match(struct device *dev, struct device_driver *drv) 189 { 190 struct bcma_device *core = container_of(dev, struct bcma_device, dev); 191 struct bcma_driver *adrv = container_of(drv, struct bcma_driver, drv); 192 const struct bcma_device_id *cid = &core->id; 193 const struct bcma_device_id *did; 194 195 for (did = adrv->id_table; did->manuf || did->id || did->rev; did++) { 196 if ((did->manuf == cid->manuf || did->manuf == BCMA_ANY_MANUF) && 197 (did->id == cid->id || did->id == BCMA_ANY_ID) && 198 (did->rev == cid->rev || did->rev == BCMA_ANY_REV) && 199 (did->class == cid->class || did->class == BCMA_ANY_CLASS)) 200 return 1; 201 } 202 return 0; 203 } 204 205 static int bcma_device_probe(struct device *dev) 206 { 207 struct bcma_device *core = container_of(dev, struct bcma_device, dev); 208 struct bcma_driver *adrv = container_of(dev->driver, struct bcma_driver, 209 drv); 210 int err = 0; 211 212 if (adrv->probe) 213 err = adrv->probe(core); 214 215 return err; 216 } 217 218 static int bcma_device_remove(struct device *dev) 219 { 220 struct bcma_device *core = container_of(dev, struct bcma_device, dev); 221 struct bcma_driver *adrv = container_of(dev->driver, struct bcma_driver, 222 drv); 223 224 if (adrv->remove) 225 adrv->remove(core); 226 227 return 0; 228 } 229 230 static int __init bcma_modinit(void) 231 { 232 int err; 233 234 err = bus_register(&bcma_bus_type); 235 if (err) 236 return err; 237 238 #ifdef CONFIG_BCMA_HOST_PCI 239 err = bcma_host_pci_init(); 240 if (err) { 241 pr_err("PCI host initialization failed\n"); 242 err = 0; 243 } 244 #endif 245 246 return err; 247 } 248 fs_initcall(bcma_modinit); 249 250 static void __exit bcma_modexit(void) 251 { 252 #ifdef CONFIG_BCMA_HOST_PCI 253 bcma_host_pci_exit(); 254 #endif 255 bus_unregister(&bcma_bus_type); 256 } 257 module_exit(bcma_modexit) 258