drivers/bcma/main.c

   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)