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                         core->dma_dev = &bus->host_pci->dev;
  93                         core->irq = bus->host_pci->irq;
  94                         break;
  95                 case BCMA_HOSTTYPE_NONE:
  96                 case BCMA_HOSTTYPE_SDIO:
  97                         break;
  98                 }
  99
 100                 err = device_register(&core->dev);
 101                 if (err) {
 102                         pr_err("Could not register dev for core 0x%03X\n",
 103                                core->id.id);
 104                         continue;
 105                 }
 106                 core->dev_registered = true;
 107                 dev_id++;
 108         }
 109
 110         return 0;
 111 }
 112
 113 static void bcma_unregister_cores(struct bcma_bus *bus)
 114 {
 115         struct bcma_device *core;
 116
 117         list_for_each_entry(core, &bus->cores, list) {
 118                 if (core->dev_registered)
 119                         device_unregister(&core->dev);
 120         }
 121 }
 122
 123 int bcma_bus_register(struct bcma_bus *bus)
 124 {
 125         int err;
 126         struct bcma_device *core;
 127
 128         /* Scan for devices (cores) */
 129         err = bcma_bus_scan(bus);
 130         if (err) {
 131                 pr_err("Failed to scan: %d\n", err);
 132                 return -1;
 133         }
 134
 135         /* Init CC core */
 136         core = bcma_find_core(bus, BCMA_CORE_CHIPCOMMON);
 137         if (core) {
 138                 bus->drv_cc.core = core;
 139                 bcma_core_chipcommon_init(&bus->drv_cc);
 140         }
 141
 142         /* Init PCIE core */
 143         core = bcma_find_core(bus, BCMA_CORE_PCIE);
 144         if (core) {
 145                 bus->drv_pci.core = core;
 146                 bcma_core_pci_init(&bus->drv_pci);
 147         }
 148
 149         /* Register found cores */
 150         bcma_register_cores(bus);
 151
 152         pr_info("Bus registered\n");
 153
 154         return 0;
 155 }
 156 EXPORT_SYMBOL_GPL(bcma_bus_register);
 157
 158 void bcma_bus_unregister(struct bcma_bus *bus)
 159 {
 160         bcma_unregister_cores(bus);
 161 }
 162 EXPORT_SYMBOL_GPL(bcma_bus_unregister);
 163
 164 int __bcma_driver_register(struct bcma_driver *drv, struct module *owner)
 165 {
 166         drv->drv.name = drv->name;
 167         drv->drv.bus = &bcma_bus_type;
 168         drv->drv.owner = owner;
 169
 170         return driver_register(&drv->drv);
 171 }
 172 EXPORT_SYMBOL_GPL(__bcma_driver_register);
 173
 174 void bcma_driver_unregister(struct bcma_driver *drv)
 175 {
 176         driver_unregister(&drv->drv);
 177 }
 178 EXPORT_SYMBOL_GPL(bcma_driver_unregister);
 179
 180 static int bcma_bus_match(struct device *dev, struct device_driver *drv)
 181 {
 182         struct bcma_device *core = container_of(dev, struct bcma_device, dev);
 183         struct bcma_driver *adrv = container_of(drv, struct bcma_driver, drv);
 184         const struct bcma_device_id *cid = &core->id;
 185         const struct bcma_device_id *did;
 186
 187         for (did = adrv->id_table; did->manuf || did->id || did->rev; did++) {
 188             if ((did->manuf == cid->manuf || did->manuf == BCMA_ANY_MANUF) &&
 189                 (did->id == cid->id || did->id == BCMA_ANY_ID) &&
 190                 (did->rev == cid->rev || did->rev == BCMA_ANY_REV) &&
 191                 (did->class == cid->class || did->class == BCMA_ANY_CLASS))
 192                         return 1;
 193         }
 194         return 0;
 195 }
 196
 197 static int bcma_device_probe(struct device *dev)
 198 {
 199         struct bcma_device *core = container_of(dev, struct bcma_device, dev);
 200         struct bcma_driver *adrv = container_of(dev->driver, struct bcma_driver,
 201                                                drv);
 202         int err = 0;
 203
 204         if (adrv->probe)
 205                 err = adrv->probe(core);
 206
 207         return err;
 208 }
 209
 210 static int bcma_device_remove(struct device *dev)
 211 {
 212         struct bcma_device *core = container_of(dev, struct bcma_device, dev);
 213         struct bcma_driver *adrv = container_of(dev->driver, struct bcma_driver,
 214                                                drv);
 215
 216         if (adrv->remove)
 217                 adrv->remove(core);
 218
 219         return 0;
 220 }
 221
 222 static int __init bcma_modinit(void)
 223 {
 224         int err;
 225
 226         err = bus_register(&bcma_bus_type);
 227         if (err)
 228                 return err;
 229
 230 #ifdef CONFIG_BCMA_HOST_PCI
 231         err = bcma_host_pci_init();
 232         if (err) {
 233                 pr_err("PCI host initialization failed\n");
 234                 err = 0;
 235         }
 236 #endif
 237
 238         return err;
 239 }
 240 fs_initcall(bcma_modinit);
 241
 242 static void __exit bcma_modexit(void)
 243 {
 244 #ifdef CONFIG_BCMA_HOST_PCI
 245         bcma_host_pci_exit();
 246 #endif
 247         bus_unregister(&bcma_bus_type);
 248 }
 249 module_exit(bcma_modexit)