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/module.h>
  10 #include <linux/bcma/bcma.h>
  11 #include <linux/slab.h>
  12
  13 MODULE_DESCRIPTION("Broadcom's specific AMBA driver");
  14 MODULE_LICENSE("GPL");
  15
  16 /* contains the number the next bus should get. */
  17 static unsigned int bcma_bus_next_num = 0;
  18
  19 /* bcma_buses_mutex locks the bcma_bus_next_num */
  20 static DEFINE_MUTEX(bcma_buses_mutex);
  21
  22 static int bcma_bus_match(struct device *dev, struct device_driver *drv);
  23 static int bcma_device_probe(struct device *dev);
  24 static int bcma_device_remove(struct device *dev);
  25 static int bcma_device_uevent(struct device *dev, struct kobj_uevent_env *env);
  26
  27 static ssize_t manuf_show(struct device *dev, struct device_attribute *attr, char *buf)
  28 {
  29         struct bcma_device *core = container_of(dev, struct bcma_device, dev);
  30         return sprintf(buf, "0x%03X\n", core->id.manuf);
  31 }
  32 static ssize_t id_show(struct device *dev, struct device_attribute *attr, char *buf)
  33 {
  34         struct bcma_device *core = container_of(dev, struct bcma_device, dev);
  35         return sprintf(buf, "0x%03X\n", core->id.id);
  36 }
  37 static ssize_t rev_show(struct device *dev, struct device_attribute *attr, char *buf)
  38 {
  39         struct bcma_device *core = container_of(dev, struct bcma_device, dev);
  40         return sprintf(buf, "0x%02X\n", core->id.rev);
  41 }
  42 static ssize_t class_show(struct device *dev, struct device_attribute *attr, char *buf)
  43 {
  44         struct bcma_device *core = container_of(dev, struct bcma_device, dev);
  45         return sprintf(buf, "0x%X\n", core->id.class);
  46 }
  47 static struct device_attribute bcma_device_attrs[] = {
  48         __ATTR_RO(manuf),
  49         __ATTR_RO(id),
  50         __ATTR_RO(rev),
  51         __ATTR_RO(class),
  52         __ATTR_NULL,
  53 };
  54
  55 static struct bus_type bcma_bus_type = {
  56         .name           = "bcma",
  57         .match          = bcma_bus_match,
  58         .probe          = bcma_device_probe,
  59         .remove         = bcma_device_remove,
  60         .uevent         = bcma_device_uevent,
  61         .dev_attrs      = bcma_device_attrs,
  62 };
  63
  64 struct bcma_device *bcma_find_core(struct bcma_bus *bus, u16 coreid)
  65 {
  66         struct bcma_device *core;
  67
  68         list_for_each_entry(core, &bus->cores, list) {
  69                 if (core->id.id == coreid)
  70                         return core;
  71         }
  72         return NULL;
  73 }
  74 EXPORT_SYMBOL_GPL(bcma_find_core);
  75
  76 static void bcma_release_core_dev(struct device *dev)
  77 {
  78         struct bcma_device *core = container_of(dev, struct bcma_device, dev);
  79         if (core->io_addr)
  80                 iounmap(core->io_addr);
  81         if (core->io_wrap)
  82                 iounmap(core->io_wrap);
  83         kfree(core);
  84 }
  85
  86 static int bcma_register_cores(struct bcma_bus *bus)
  87 {
  88         struct bcma_device *core;
  89         int err, dev_id = 0;
  90
  91         list_for_each_entry(core, &bus->cores, list) {
  92                 /* We support that cores ourself */
  93                 switch (core->id.id) {
  94                 case BCMA_CORE_CHIPCOMMON:
  95                 case BCMA_CORE_PCI:
  96                 case BCMA_CORE_PCIE:
  97                 case BCMA_CORE_MIPS_74K:
  98                         continue;
  99                 }
 100
 101                 core->dev.release = bcma_release_core_dev;
 102                 core->dev.bus = &bcma_bus_type;
 103                 dev_set_name(&core->dev, "bcma%d:%d", bus->num, dev_id);
 104
 105                 switch (bus->hosttype) {
 106                 case BCMA_HOSTTYPE_PCI:
 107                         core->dev.parent = &bus->host_pci->dev;
 108                         core->dma_dev = &bus->host_pci->dev;
 109                         core->irq = bus->host_pci->irq;
 110                         break;
 111                 case BCMA_HOSTTYPE_SOC:
 112                         core->dev.dma_mask = &core->dev.coherent_dma_mask;
 113                         core->dma_dev = &core->dev;
 114                         break;
 115                 case BCMA_HOSTTYPE_SDIO:
 116                         break;
 117                 }
 118
 119                 err = device_register(&core->dev);
 120                 if (err) {
 121                         pr_err("Could not register dev for core 0x%03X\n",
 122                                core->id.id);
 123                         continue;
 124                 }
 125                 core->dev_registered = true;
 126                 dev_id++;
 127         }
 128
 129         return 0;
 130 }
 131
 132 static void bcma_unregister_cores(struct bcma_bus *bus)
 133 {
 134         struct bcma_device *core;
 135
 136         list_for_each_entry(core, &bus->cores, list) {
 137                 if (core->dev_registered)
 138                         device_unregister(&core->dev);
 139         }
 140 }
 141
 142 int __devinit bcma_bus_register(struct bcma_bus *bus)
 143 {
 144         int err;
 145         struct bcma_device *core;
 146
 147         mutex_lock(&bcma_buses_mutex);
 148         bus->num = bcma_bus_next_num++;
 149         mutex_unlock(&bcma_buses_mutex);
 150
 151         /* Scan for devices (cores) */
 152         err = bcma_bus_scan(bus);
 153         if (err) {
 154                 pr_err("Failed to scan: %d\n", err);
 155                 return -1;
 156         }
 157
 158         /* Init CC core */
 159         core = bcma_find_core(bus, BCMA_CORE_CHIPCOMMON);
 160         if (core) {
 161                 bus->drv_cc.core = core;
 162                 bcma_core_chipcommon_init(&bus->drv_cc);
 163         }
 164
 165         /* Init MIPS core */
 166         core = bcma_find_core(bus, BCMA_CORE_MIPS_74K);
 167         if (core) {
 168                 bus->drv_mips.core = core;
 169                 bcma_core_mips_init(&bus->drv_mips);
 170         }
 171
 172         /* Init PCIE core */
 173         core = bcma_find_core(bus, BCMA_CORE_PCIE);
 174         if (core) {
 175                 bus->drv_pci.core = core;
 176                 bcma_core_pci_init(&bus->drv_pci);
 177         }
 178
 179         /* Try to get SPROM */
 180         err = bcma_sprom_get(bus);
 181         if (err == -ENOENT) {
 182                 pr_err("No SPROM available\n");
 183         } else if (err)
 184                 pr_err("Failed to get SPROM: %d\n", err);
 185
 186         /* Register found cores */
 187         bcma_register_cores(bus);
 188
 189         pr_info("Bus registered\n");
 190
 191         return 0;
 192 }
 193
 194 void bcma_bus_unregister(struct bcma_bus *bus)
 195 {
 196         bcma_unregister_cores(bus);
 197 }
 198
 199 int __init bcma_bus_early_register(struct bcma_bus *bus,
 200                                    struct bcma_device *core_cc,
 201                                    struct bcma_device *core_mips)
 202 {
 203         int err;
 204         struct bcma_device *core;
 205         struct bcma_device_id match;
 206
 207         bcma_init_bus(bus);
 208
 209         match.manuf = BCMA_MANUF_BCM;
 210         match.id = BCMA_CORE_CHIPCOMMON;
 211         match.class = BCMA_CL_SIM;
 212         match.rev = BCMA_ANY_REV;
 213
 214         /* Scan for chip common core */
 215         err = bcma_bus_scan_early(bus, &match, core_cc);
 216         if (err) {
 217                 pr_err("Failed to scan for common core: %d\n", err);
 218                 return -1;
 219         }
 220
 221         match.manuf = BCMA_MANUF_MIPS;
 222         match.id = BCMA_CORE_MIPS_74K;
 223         match.class = BCMA_CL_SIM;
 224         match.rev = BCMA_ANY_REV;
 225
 226         /* Scan for mips core */
 227         err = bcma_bus_scan_early(bus, &match, core_mips);
 228         if (err) {
 229                 pr_err("Failed to scan for mips core: %d\n", err);
 230                 return -1;
 231         }
 232
 233         /* Init CC core */
 234         core = bcma_find_core(bus, BCMA_CORE_CHIPCOMMON);
 235         if (core) {
 236                 bus->drv_cc.core = core;
 237                 bcma_core_chipcommon_init(&bus->drv_cc);
 238         }
 239
 240         /* Init MIPS core */
 241         core = bcma_find_core(bus, BCMA_CORE_MIPS_74K);
 242         if (core) {
 243                 bus->drv_mips.core = core;
 244                 bcma_core_mips_init(&bus->drv_mips);
 245         }
 246
 247         pr_info("Early bus registered\n");
 248
 249         return 0;
 250 }
 251
 252 #ifdef CONFIG_PM
 253 int bcma_bus_suspend(struct bcma_bus *bus)
 254 {
 255         struct bcma_device *core;
 256
 257         list_for_each_entry(core, &bus->cores, list) {
 258                 struct device_driver *drv = core->dev.driver;
 259                 if (drv) {
 260                         struct bcma_driver *adrv = container_of(drv, struct bcma_driver, drv);
 261                         if (adrv->suspend)
 262                                 adrv->suspend(core);
 263                 }
 264         }
 265         return 0;
 266 }
 267
 268 int bcma_bus_resume(struct bcma_bus *bus)
 269 {
 270         struct bcma_device *core;
 271
 272         /* Init CC core */
 273         core = bcma_find_core(bus, BCMA_CORE_CHIPCOMMON);
 274         if (core) {
 275                 bus->drv_cc.setup_done = false;
 276                 bcma_core_chipcommon_init(&bus->drv_cc);
 277         }
 278
 279         list_for_each_entry(core, &bus->cores, list) {
 280                 struct device_driver *drv = core->dev.driver;
 281                 if (drv) {
 282                         struct bcma_driver *adrv = container_of(drv, struct bcma_driver, drv);
 283                         if (adrv->resume)
 284                                 adrv->resume(core);
 285                 }
 286         }
 287
 288         return 0;
 289 }
 290 #endif
 291
 292 int __bcma_driver_register(struct bcma_driver *drv, struct module *owner)
 293 {
 294         drv->drv.name = drv->name;
 295         drv->drv.bus = &bcma_bus_type;
 296         drv->drv.owner = owner;
 297
 298         return driver_register(&drv->drv);
 299 }
 300 EXPORT_SYMBOL_GPL(__bcma_driver_register);
 301
 302 void bcma_driver_unregister(struct bcma_driver *drv)
 303 {
 304         driver_unregister(&drv->drv);
 305 }
 306 EXPORT_SYMBOL_GPL(bcma_driver_unregister);
 307
 308 static int bcma_bus_match(struct device *dev, struct device_driver *drv)
 309 {
 310         struct bcma_device *core = container_of(dev, struct bcma_device, dev);
 311         struct bcma_driver *adrv = container_of(drv, struct bcma_driver, drv);
 312         const struct bcma_device_id *cid = &core->id;
 313         const struct bcma_device_id *did;
 314
 315         for (did = adrv->id_table; did->manuf || did->id || did->rev; did++) {
 316             if ((did->manuf == cid->manuf || did->manuf == BCMA_ANY_MANUF) &&
 317                 (did->id == cid->id || did->id == BCMA_ANY_ID) &&
 318                 (did->rev == cid->rev || did->rev == BCMA_ANY_REV) &&
 319                 (did->class == cid->class || did->class == BCMA_ANY_CLASS))
 320                         return 1;
 321         }
 322         return 0;
 323 }
 324
 325 static int bcma_device_probe(struct device *dev)
 326 {
 327         struct bcma_device *core = container_of(dev, struct bcma_device, dev);
 328         struct bcma_driver *adrv = container_of(dev->driver, struct bcma_driver,
 329                                                drv);
 330         int err = 0;
 331
 332         if (adrv->probe)
 333                 err = adrv->probe(core);
 334
 335         return err;
 336 }
 337
 338 static int bcma_device_remove(struct device *dev)
 339 {
 340         struct bcma_device *core = container_of(dev, struct bcma_device, dev);
 341         struct bcma_driver *adrv = container_of(dev->driver, struct bcma_driver,
 342                                                drv);
 343
 344         if (adrv->remove)
 345                 adrv->remove(core);
 346
 347         return 0;
 348 }
 349
 350 static int bcma_device_uevent(struct device *dev, struct kobj_uevent_env *env)
 351 {
 352         struct bcma_device *core = container_of(dev, struct bcma_device, dev);
 353
 354         return add_uevent_var(env,
 355                               "MODALIAS=bcma:m%04Xid%04Xrev%02Xcl%02X",
 356                               core->id.manuf, core->id.id,
 357                               core->id.rev, core->id.class);
 358 }
 359
 360 static int __init bcma_modinit(void)
 361 {
 362         int err;
 363
 364         err = bus_register(&bcma_bus_type);
 365         if (err)
 366                 return err;
 367
 368 #ifdef CONFIG_BCMA_HOST_PCI
 369         err = bcma_host_pci_init();
 370         if (err) {
 371                 pr_err("PCI host initialization failed\n");
 372                 err = 0;
 373         }
 374 #endif
 375
 376         return err;
 377 }
 378 fs_initcall(bcma_modinit);
 379
 380 static void __exit bcma_modexit(void)
 381 {
 382 #ifdef CONFIG_BCMA_HOST_PCI
 383         bcma_host_pci_exit();
 384 #endif
 385         bus_unregister(&bcma_bus_type);
 386 }
 387 module_exit(bcma_modexit)