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 #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 __init bcma_bus_early_register(struct bcma_bus *bus,
 173                                    struct bcma_device *core_cc,
 174                                    struct bcma_device *core_mips)
 175 {
 176         int err;
 177         struct bcma_device *core;
 178         struct bcma_device_id match;
 179
 180         bcma_init_bus(bus);
 181
 182         match.manuf = BCMA_MANUF_BCM;
 183         match.id = BCMA_CORE_CHIPCOMMON;
 184         match.class = BCMA_CL_SIM;
 185         match.rev = BCMA_ANY_REV;
 186
 187         /* Scan for chip common core */
 188         err = bcma_bus_scan_early(bus, &match, core_cc);
 189         if (err) {
 190                 pr_err("Failed to scan for common core: %d\n", err);
 191                 return -1;
 192         }
 193
 194         match.manuf = BCMA_MANUF_MIPS;
 195         match.id = BCMA_CORE_MIPS_74K;
 196         match.class = BCMA_CL_SIM;
 197         match.rev = BCMA_ANY_REV;
 198
 199         /* Scan for mips core */
 200         err = bcma_bus_scan_early(bus, &match, core_mips);
 201         if (err) {
 202                 pr_err("Failed to scan for mips core: %d\n", err);
 203                 return -1;
 204         }
 205
 206         /* Init CC core */
 207         core = bcma_find_core(bus, BCMA_CORE_CHIPCOMMON);
 208         if (core) {
 209                 bus->drv_cc.core = core;
 210                 bcma_core_chipcommon_init(&bus->drv_cc);
 211         }
 212
 213         pr_info("Early bus registered\n");
 214
 215         return 0;
 216 }
 217
 218 int __bcma_driver_register(struct bcma_driver *drv, struct module *owner)
 219 {
 220         drv->drv.name = drv->name;
 221         drv->drv.bus = &bcma_bus_type;
 222         drv->drv.owner = owner;
 223
 224         return driver_register(&drv->drv);
 225 }
 226 EXPORT_SYMBOL_GPL(__bcma_driver_register);
 227
 228 void bcma_driver_unregister(struct bcma_driver *drv)
 229 {
 230         driver_unregister(&drv->drv);
 231 }
 232 EXPORT_SYMBOL_GPL(bcma_driver_unregister);
 233
 234 static int bcma_bus_match(struct device *dev, struct device_driver *drv)
 235 {
 236         struct bcma_device *core = container_of(dev, struct bcma_device, dev);
 237         struct bcma_driver *adrv = container_of(drv, struct bcma_driver, drv);
 238         const struct bcma_device_id *cid = &core->id;
 239         const struct bcma_device_id *did;
 240
 241         for (did = adrv->id_table; did->manuf || did->id || did->rev; did++) {
 242             if ((did->manuf == cid->manuf || did->manuf == BCMA_ANY_MANUF) &&
 243                 (did->id == cid->id || did->id == BCMA_ANY_ID) &&
 244                 (did->rev == cid->rev || did->rev == BCMA_ANY_REV) &&
 245                 (did->class == cid->class || did->class == BCMA_ANY_CLASS))
 246                         return 1;
 247         }
 248         return 0;
 249 }
 250
 251 static int bcma_device_probe(struct device *dev)
 252 {
 253         struct bcma_device *core = container_of(dev, struct bcma_device, dev);
 254         struct bcma_driver *adrv = container_of(dev->driver, struct bcma_driver,
 255                                                drv);
 256         int err = 0;
 257
 258         if (adrv->probe)
 259                 err = adrv->probe(core);
 260
 261         return err;
 262 }
 263
 264 static int bcma_device_remove(struct device *dev)
 265 {
 266         struct bcma_device *core = container_of(dev, struct bcma_device, dev);
 267         struct bcma_driver *adrv = container_of(dev->driver, struct bcma_driver,
 268                                                drv);
 269
 270         if (adrv->remove)
 271                 adrv->remove(core);
 272
 273         return 0;
 274 }
 275
 276 static int __init bcma_modinit(void)
 277 {
 278         int err;
 279
 280         err = bus_register(&bcma_bus_type);
 281         if (err)
 282                 return err;
 283
 284 #ifdef CONFIG_BCMA_HOST_PCI
 285         err = bcma_host_pci_init();
 286         if (err) {
 287                 pr_err("PCI host initialization failed\n");
 288                 err = 0;
 289         }
 290 #endif
 291
 292         return err;
 293 }
 294 fs_initcall(bcma_modinit);
 295
 296 static void __exit bcma_modexit(void)
 297 {
 298 #ifdef CONFIG_BCMA_HOST_PCI
 299         bcma_host_pci_exit();
 300 #endif
 301         bus_unregister(&bcma_bus_type);
 302 }
 303 module_exit(bcma_modexit)