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/platform_device.h>
  11 #include <linux/bcma/bcma.h>
  12 #include <linux/slab.h>
  13
  14 MODULE_DESCRIPTION("Broadcom's specific AMBA driver");
  15 MODULE_LICENSE("GPL");
  16
  17 /* contains the number the next bus should get. */
  18 static unsigned int bcma_bus_next_num = 0;
  19
  20 /* bcma_buses_mutex locks the bcma_bus_next_num */
  21 static DEFINE_MUTEX(bcma_buses_mutex);
  22
  23 static int bcma_bus_match(struct device *dev, struct device_driver *drv);
  24 static int bcma_device_probe(struct device *dev);
  25 static int bcma_device_remove(struct device *dev);
  26 static int bcma_device_uevent(struct device *dev, struct kobj_uevent_env *env);
  27
  28 static ssize_t manuf_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%03X\n", core->id.manuf);
  32 }
  33 static ssize_t id_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%03X\n", core->id.id);
  37 }
  38 static ssize_t rev_show(struct device *dev, struct device_attribute *attr, char *buf)
  39 {
  40         struct bcma_device *core = container_of(dev, struct bcma_device, dev);
  41         return sprintf(buf, "0x%02X\n", core->id.rev);
  42 }
  43 static ssize_t class_show(struct device *dev, struct device_attribute *attr, char *buf)
  44 {
  45         struct bcma_device *core = container_of(dev, struct bcma_device, dev);
  46         return sprintf(buf, "0x%X\n", core->id.class);
  47 }
  48 static struct device_attribute bcma_device_attrs[] = {
  49         __ATTR_RO(manuf),
  50         __ATTR_RO(id),
  51         __ATTR_RO(rev),
  52         __ATTR_RO(class),
  53         __ATTR_NULL,
  54 };
  55
  56 static struct bus_type bcma_bus_type = {
  57         .name           = "bcma",
  58         .match          = bcma_bus_match,
  59         .probe          = bcma_device_probe,
  60         .remove         = bcma_device_remove,
  61         .uevent         = bcma_device_uevent,
  62         .dev_attrs      = bcma_device_attrs,
  63 };
  64
  65 static u16 bcma_cc_core_id(struct bcma_bus *bus)
  66 {
  67         if (bus->chipinfo.id == BCMA_CHIP_ID_BCM4706)
  68                 return BCMA_CORE_4706_CHIPCOMMON;
  69         return BCMA_CORE_CHIPCOMMON;
  70 }
  71
  72 struct bcma_device *bcma_find_core(struct bcma_bus *bus, u16 coreid)
  73 {
  74         struct bcma_device *core;
  75
  76         list_for_each_entry(core, &bus->cores, list) {
  77                 if (core->id.id == coreid)
  78                         return core;
  79         }
  80         return NULL;
  81 }
  82 EXPORT_SYMBOL_GPL(bcma_find_core);
  83
  84 static struct bcma_device *bcma_find_core_unit(struct bcma_bus *bus, u16 coreid,
  85                                                u8 unit)
  86 {
  87         struct bcma_device *core;
  88
  89         list_for_each_entry(core, &bus->cores, list) {
  90                 if (core->id.id == coreid && core->core_unit == unit)
  91                         return core;
  92         }
  93         return NULL;
  94 }
  95
  96 static void bcma_release_core_dev(struct device *dev)
  97 {
  98         struct bcma_device *core = container_of(dev, struct bcma_device, dev);
  99         if (core->io_addr)
 100                 iounmap(core->io_addr);
 101         if (core->io_wrap)
 102                 iounmap(core->io_wrap);
 103         kfree(core);
 104 }
 105
 106 static int bcma_register_cores(struct bcma_bus *bus)
 107 {
 108         struct bcma_device *core;
 109         int err, dev_id = 0;
 110
 111         list_for_each_entry(core, &bus->cores, list) {
 112                 /* We support that cores ourself */
 113                 switch (core->id.id) {
 114                 case BCMA_CORE_4706_CHIPCOMMON:
 115                 case BCMA_CORE_CHIPCOMMON:
 116                 case BCMA_CORE_PCI:
 117                 case BCMA_CORE_PCIE:
 118                 case BCMA_CORE_MIPS_74K:
 119                 case BCMA_CORE_4706_MAC_GBIT_COMMON:
 120                         continue;
 121                 }
 122
 123                 core->dev.release = bcma_release_core_dev;
 124                 core->dev.bus = &bcma_bus_type;
 125                 dev_set_name(&core->dev, "bcma%d:%d", bus->num, dev_id);
 126
 127                 switch (bus->hosttype) {
 128                 case BCMA_HOSTTYPE_PCI:
 129                         core->dev.parent = &bus->host_pci->dev;
 130                         core->dma_dev = &bus->host_pci->dev;
 131                         core->irq = bus->host_pci->irq;
 132                         break;
 133                 case BCMA_HOSTTYPE_SOC:
 134                         core->dev.dma_mask = &core->dev.coherent_dma_mask;
 135                         core->dma_dev = &core->dev;
 136                         break;
 137                 case BCMA_HOSTTYPE_SDIO:
 138                         break;
 139                 }
 140
 141                 err = device_register(&core->dev);
 142                 if (err) {
 143                         bcma_err(bus,
 144                                  "Could not register dev for core 0x%03X\n",
 145                                  core->id.id);
 146                         continue;
 147                 }
 148                 core->dev_registered = true;
 149                 dev_id++;
 150         }
 151
 152 #ifdef CONFIG_BCMA_SFLASH
 153         if (bus->drv_cc.sflash.present) {
 154                 err = platform_device_register(&bcma_sflash_dev);
 155                 if (err)
 156                         bcma_err(bus, "Error registering serial flash\n");
 157         }
 158 #endif
 159
 160 #ifdef CONFIG_BCMA_NFLASH
 161         if (bus->drv_cc.nflash.present) {
 162                 err = platform_device_register(&bcma_nflash_dev);
 163                 if (err)
 164                         bcma_err(bus, "Error registering NAND flash\n");
 165         }
 166 #endif
 167
 168         if (bus->hosttype == BCMA_HOSTTYPE_SOC) {
 169                 err = bcma_chipco_watchdog_register(&bus->drv_cc);
 170                 if (err)
 171                         bcma_err(bus, "Error registering watchdog driver\n");
 172         }
 173
 174         return 0;
 175 }
 176
 177 static void bcma_unregister_cores(struct bcma_bus *bus)
 178 {
 179         struct bcma_device *core, *tmp;
 180
 181         list_for_each_entry_safe(core, tmp, &bus->cores, list) {
 182                 list_del(&core->list);
 183                 if (core->dev_registered)
 184                         device_unregister(&core->dev);
 185         }
 186         if (bus->hosttype == BCMA_HOSTTYPE_SOC)
 187                 platform_device_unregister(bus->drv_cc.watchdog);
 188 }
 189
 190 int __devinit bcma_bus_register(struct bcma_bus *bus)
 191 {
 192         int err;
 193         struct bcma_device *core;
 194
 195         mutex_lock(&bcma_buses_mutex);
 196         bus->num = bcma_bus_next_num++;
 197         mutex_unlock(&bcma_buses_mutex);
 198
 199         /* Scan for devices (cores) */
 200         err = bcma_bus_scan(bus);
 201         if (err) {
 202                 bcma_err(bus, "Failed to scan: %d\n", err);
 203                 return -1;
 204         }
 205
 206         /* Early init CC core */
 207         core = bcma_find_core(bus, bcma_cc_core_id(bus));
 208         if (core) {
 209                 bus->drv_cc.core = core;
 210                 bcma_core_chipcommon_early_init(&bus->drv_cc);
 211         }
 212
 213         /* Try to get SPROM */
 214         err = bcma_sprom_get(bus);
 215         if (err == -ENOENT) {
 216                 bcma_err(bus, "No SPROM available\n");
 217         } else if (err)
 218                 bcma_err(bus, "Failed to get SPROM: %d\n", err);
 219
 220         /* Init CC core */
 221         core = bcma_find_core(bus, bcma_cc_core_id(bus));
 222         if (core) {
 223                 bus->drv_cc.core = core;
 224                 bcma_core_chipcommon_init(&bus->drv_cc);
 225         }
 226
 227         /* Init MIPS core */
 228         core = bcma_find_core(bus, BCMA_CORE_MIPS_74K);
 229         if (core) {
 230                 bus->drv_mips.core = core;
 231                 bcma_core_mips_init(&bus->drv_mips);
 232         }
 233
 234         /* Init PCIE core */
 235         core = bcma_find_core_unit(bus, BCMA_CORE_PCIE, 0);
 236         if (core) {
 237                 bus->drv_pci[0].core = core;
 238                 bcma_core_pci_init(&bus->drv_pci[0]);
 239         }
 240
 241         /* Init PCIE core */
 242         core = bcma_find_core_unit(bus, BCMA_CORE_PCIE, 1);
 243         if (core) {
 244                 bus->drv_pci[1].core = core;
 245                 bcma_core_pci_init(&bus->drv_pci[1]);
 246         }
 247
 248         /* Init GBIT MAC COMMON core */
 249         core = bcma_find_core(bus, BCMA_CORE_4706_MAC_GBIT_COMMON);
 250         if (core) {
 251                 bus->drv_gmac_cmn.core = core;
 252                 bcma_core_gmac_cmn_init(&bus->drv_gmac_cmn);
 253         }
 254
 255         /* Register found cores */
 256         bcma_register_cores(bus);
 257
 258         bcma_info(bus, "Bus registered\n");
 259
 260         return 0;
 261 }
 262
 263 void bcma_bus_unregister(struct bcma_bus *bus)
 264 {
 265         struct bcma_device *cores[3];
 266
 267         cores[0] = bcma_find_core(bus, BCMA_CORE_MIPS_74K);
 268         cores[1] = bcma_find_core(bus, BCMA_CORE_PCIE);
 269         cores[2] = bcma_find_core(bus, BCMA_CORE_4706_MAC_GBIT_COMMON);
 270
 271         bcma_unregister_cores(bus);
 272
 273         kfree(cores[2]);
 274         kfree(cores[1]);
 275         kfree(cores[0]);
 276 }
 277
 278 int __init bcma_bus_early_register(struct bcma_bus *bus,
 279                                    struct bcma_device *core_cc,
 280                                    struct bcma_device *core_mips)
 281 {
 282         int err;
 283         struct bcma_device *core;
 284         struct bcma_device_id match;
 285
 286         bcma_init_bus(bus);
 287
 288         match.manuf = BCMA_MANUF_BCM;
 289         match.id = bcma_cc_core_id(bus);
 290         match.class = BCMA_CL_SIM;
 291         match.rev = BCMA_ANY_REV;
 292
 293         /* Scan for chip common core */
 294         err = bcma_bus_scan_early(bus, &match, core_cc);
 295         if (err) {
 296                 bcma_err(bus, "Failed to scan for common core: %d\n", err);
 297                 return -1;
 298         }
 299
 300         match.manuf = BCMA_MANUF_MIPS;
 301         match.id = BCMA_CORE_MIPS_74K;
 302         match.class = BCMA_CL_SIM;
 303         match.rev = BCMA_ANY_REV;
 304
 305         /* Scan for mips core */
 306         err = bcma_bus_scan_early(bus, &match, core_mips);
 307         if (err) {
 308                 bcma_err(bus, "Failed to scan for mips core: %d\n", err);
 309                 return -1;
 310         }
 311
 312         /* Early init CC core */
 313         core = bcma_find_core(bus, bcma_cc_core_id(bus));
 314         if (core) {
 315                 bus->drv_cc.core = core;
 316                 bcma_core_chipcommon_early_init(&bus->drv_cc);
 317         }
 318
 319         /* Early init MIPS core */
 320         core = bcma_find_core(bus, BCMA_CORE_MIPS_74K);
 321         if (core) {
 322                 bus->drv_mips.core = core;
 323                 bcma_core_mips_early_init(&bus->drv_mips);
 324         }
 325
 326         bcma_info(bus, "Early bus registered\n");
 327
 328         return 0;
 329 }
 330
 331 #ifdef CONFIG_PM
 332 int bcma_bus_suspend(struct bcma_bus *bus)
 333 {
 334         struct bcma_device *core;
 335
 336         list_for_each_entry(core, &bus->cores, list) {
 337                 struct device_driver *drv = core->dev.driver;
 338                 if (drv) {
 339                         struct bcma_driver *adrv = container_of(drv, struct bcma_driver, drv);
 340                         if (adrv->suspend)
 341                                 adrv->suspend(core);
 342                 }
 343         }
 344         return 0;
 345 }
 346
 347 int bcma_bus_resume(struct bcma_bus *bus)
 348 {
 349         struct bcma_device *core;
 350
 351         /* Init CC core */
 352         if (bus->drv_cc.core) {
 353                 bus->drv_cc.setup_done = false;
 354                 bcma_core_chipcommon_init(&bus->drv_cc);
 355         }
 356
 357         list_for_each_entry(core, &bus->cores, list) {
 358                 struct device_driver *drv = core->dev.driver;
 359                 if (drv) {
 360                         struct bcma_driver *adrv = container_of(drv, struct bcma_driver, drv);
 361                         if (adrv->resume)
 362                                 adrv->resume(core);
 363                 }
 364         }
 365
 366         return 0;
 367 }
 368 #endif
 369
 370 int __bcma_driver_register(struct bcma_driver *drv, struct module *owner)
 371 {
 372         drv->drv.name = drv->name;
 373         drv->drv.bus = &bcma_bus_type;
 374         drv->drv.owner = owner;
 375
 376         return driver_register(&drv->drv);
 377 }
 378 EXPORT_SYMBOL_GPL(__bcma_driver_register);
 379
 380 void bcma_driver_unregister(struct bcma_driver *drv)
 381 {
 382         driver_unregister(&drv->drv);
 383 }
 384 EXPORT_SYMBOL_GPL(bcma_driver_unregister);
 385
 386 static int bcma_bus_match(struct device *dev, struct device_driver *drv)
 387 {
 388         struct bcma_device *core = container_of(dev, struct bcma_device, dev);
 389         struct bcma_driver *adrv = container_of(drv, struct bcma_driver, drv);
 390         const struct bcma_device_id *cid = &core->id;
 391         const struct bcma_device_id *did;
 392
 393         for (did = adrv->id_table; did->manuf || did->id || did->rev; did++) {
 394             if ((did->manuf == cid->manuf || did->manuf == BCMA_ANY_MANUF) &&
 395                 (did->id == cid->id || did->id == BCMA_ANY_ID) &&
 396                 (did->rev == cid->rev || did->rev == BCMA_ANY_REV) &&
 397                 (did->class == cid->class || did->class == BCMA_ANY_CLASS))
 398                         return 1;
 399         }
 400         return 0;
 401 }
 402
 403 static int bcma_device_probe(struct device *dev)
 404 {
 405         struct bcma_device *core = container_of(dev, struct bcma_device, dev);
 406         struct bcma_driver *adrv = container_of(dev->driver, struct bcma_driver,
 407                                                drv);
 408         int err = 0;
 409
 410         if (adrv->probe)
 411                 err = adrv->probe(core);
 412
 413         return err;
 414 }
 415
 416 static int bcma_device_remove(struct device *dev)
 417 {
 418         struct bcma_device *core = container_of(dev, struct bcma_device, dev);
 419         struct bcma_driver *adrv = container_of(dev->driver, struct bcma_driver,
 420                                                drv);
 421
 422         if (adrv->remove)
 423                 adrv->remove(core);
 424
 425         return 0;
 426 }
 427
 428 static int bcma_device_uevent(struct device *dev, struct kobj_uevent_env *env)
 429 {
 430         struct bcma_device *core = container_of(dev, struct bcma_device, dev);
 431
 432         return add_uevent_var(env,
 433                               "MODALIAS=bcma:m%04Xid%04Xrev%02Xcl%02X",
 434                               core->id.manuf, core->id.id,
 435                               core->id.rev, core->id.class);
 436 }
 437
 438 static int __init bcma_modinit(void)
 439 {
 440         int err;
 441
 442         err = bus_register(&bcma_bus_type);
 443         if (err)
 444                 return err;
 445
 446 #ifdef CONFIG_BCMA_HOST_PCI
 447         err = bcma_host_pci_init();
 448         if (err) {
 449                 pr_err("PCI host initialization failed\n");
 450                 err = 0;
 451         }
 452 #endif
 453
 454         return err;
 455 }
 456 fs_initcall(bcma_modinit);
 457
 458 static void __exit bcma_modexit(void)
 459 {
 460 #ifdef CONFIG_BCMA_HOST_PCI
 461         bcma_host_pci_exit();
 462 #endif
 463         bus_unregister(&bcma_bus_type);
 464 }
 465 module_exit(bcma_modexit)