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 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         err = bcma_gpio_init(&bus->drv_cc);
 168         if (err == -ENOTSUPP)
 169                 bcma_debug(bus, "GPIO driver not activated\n");
 170         else if (err)
 171                 bcma_err(bus, "Error registering GPIO driver: %i\n", err);
 172
 173         if (bus->hosttype == BCMA_HOSTTYPE_SOC) {
 174                 err = bcma_chipco_watchdog_register(&bus->drv_cc);
 175                 if (err)
 176                         bcma_err(bus, "Error registering watchdog driver\n");
 177         }
 178
 179         return 0;
 180 }
 181
 182 static void bcma_unregister_cores(struct bcma_bus *bus)
 183 {
 184         struct bcma_device *core, *tmp;
 185
 186         list_for_each_entry_safe(core, tmp, &bus->cores, list) {
 187                 list_del(&core->list);
 188                 if (core->dev_registered)
 189                         device_unregister(&core->dev);
 190         }
 191         if (bus->hosttype == BCMA_HOSTTYPE_SOC)
 192                 platform_device_unregister(bus->drv_cc.watchdog);
 193 }
 194
 195 int bcma_bus_register(struct bcma_bus *bus)
 196 {
 197         int err;
 198         struct bcma_device *core;
 199
 200         mutex_lock(&bcma_buses_mutex);
 201         bus->num = bcma_bus_next_num++;
 202         mutex_unlock(&bcma_buses_mutex);
 203
 204         /* Scan for devices (cores) */
 205         err = bcma_bus_scan(bus);
 206         if (err) {
 207                 bcma_err(bus, "Failed to scan: %d\n", err);
 208                 return -1;
 209         }
 210
 211         /* Early init CC core */
 212         core = bcma_find_core(bus, bcma_cc_core_id(bus));
 213         if (core) {
 214                 bus->drv_cc.core = core;
 215                 bcma_core_chipcommon_early_init(&bus->drv_cc);
 216         }
 217
 218         /* Try to get SPROM */
 219         err = bcma_sprom_get(bus);
 220         if (err == -ENOENT) {
 221                 bcma_err(bus, "No SPROM available\n");
 222         } else if (err)
 223                 bcma_err(bus, "Failed to get SPROM: %d\n", err);
 224
 225         /* Init CC core */
 226         core = bcma_find_core(bus, bcma_cc_core_id(bus));
 227         if (core) {
 228                 bus->drv_cc.core = core;
 229                 bcma_core_chipcommon_init(&bus->drv_cc);
 230         }
 231
 232         /* Init MIPS core */
 233         core = bcma_find_core(bus, BCMA_CORE_MIPS_74K);
 234         if (core) {
 235                 bus->drv_mips.core = core;
 236                 bcma_core_mips_init(&bus->drv_mips);
 237         }
 238
 239         /* Init PCIE core */
 240         core = bcma_find_core_unit(bus, BCMA_CORE_PCIE, 0);
 241         if (core) {
 242                 bus->drv_pci[0].core = core;
 243                 bcma_core_pci_init(&bus->drv_pci[0]);
 244         }
 245
 246         /* Init PCIE core */
 247         core = bcma_find_core_unit(bus, BCMA_CORE_PCIE, 1);
 248         if (core) {
 249                 bus->drv_pci[1].core = core;
 250                 bcma_core_pci_init(&bus->drv_pci[1]);
 251         }
 252
 253         /* Init GBIT MAC COMMON core */
 254         core = bcma_find_core(bus, BCMA_CORE_4706_MAC_GBIT_COMMON);
 255         if (core) {
 256                 bus->drv_gmac_cmn.core = core;
 257                 bcma_core_gmac_cmn_init(&bus->drv_gmac_cmn);
 258         }
 259
 260         /* Register found cores */
 261         bcma_register_cores(bus);
 262
 263         bcma_info(bus, "Bus registered\n");
 264
 265         return 0;
 266 }
 267
 268 void bcma_bus_unregister(struct bcma_bus *bus)
 269 {
 270         struct bcma_device *cores[3];
 271
 272         cores[0] = bcma_find_core(bus, BCMA_CORE_MIPS_74K);
 273         cores[1] = bcma_find_core(bus, BCMA_CORE_PCIE);
 274         cores[2] = bcma_find_core(bus, BCMA_CORE_4706_MAC_GBIT_COMMON);
 275
 276         bcma_unregister_cores(bus);
 277
 278         kfree(cores[2]);
 279         kfree(cores[1]);
 280         kfree(cores[0]);
 281 }
 282
 283 int __init bcma_bus_early_register(struct bcma_bus *bus,
 284                                    struct bcma_device *core_cc,
 285                                    struct bcma_device *core_mips)
 286 {
 287         int err;
 288         struct bcma_device *core;
 289         struct bcma_device_id match;
 290
 291         bcma_init_bus(bus);
 292
 293         match.manuf = BCMA_MANUF_BCM;
 294         match.id = bcma_cc_core_id(bus);
 295         match.class = BCMA_CL_SIM;
 296         match.rev = BCMA_ANY_REV;
 297
 298         /* Scan for chip common core */
 299         err = bcma_bus_scan_early(bus, &match, core_cc);
 300         if (err) {
 301                 bcma_err(bus, "Failed to scan for common core: %d\n", err);
 302                 return -1;
 303         }
 304
 305         match.manuf = BCMA_MANUF_MIPS;
 306         match.id = BCMA_CORE_MIPS_74K;
 307         match.class = BCMA_CL_SIM;
 308         match.rev = BCMA_ANY_REV;
 309
 310         /* Scan for mips core */
 311         err = bcma_bus_scan_early(bus, &match, core_mips);
 312         if (err) {
 313                 bcma_err(bus, "Failed to scan for mips core: %d\n", err);
 314                 return -1;
 315         }
 316
 317         /* Early init CC core */
 318         core = bcma_find_core(bus, bcma_cc_core_id(bus));
 319         if (core) {
 320                 bus->drv_cc.core = core;
 321                 bcma_core_chipcommon_early_init(&bus->drv_cc);
 322         }
 323
 324         /* Early init MIPS core */
 325         core = bcma_find_core(bus, BCMA_CORE_MIPS_74K);
 326         if (core) {
 327                 bus->drv_mips.core = core;
 328                 bcma_core_mips_early_init(&bus->drv_mips);
 329         }
 330
 331         bcma_info(bus, "Early bus registered\n");
 332
 333         return 0;
 334 }
 335
 336 #ifdef CONFIG_PM
 337 int bcma_bus_suspend(struct bcma_bus *bus)
 338 {
 339         struct bcma_device *core;
 340
 341         list_for_each_entry(core, &bus->cores, list) {
 342                 struct device_driver *drv = core->dev.driver;
 343                 if (drv) {
 344                         struct bcma_driver *adrv = container_of(drv, struct bcma_driver, drv);
 345                         if (adrv->suspend)
 346                                 adrv->suspend(core);
 347                 }
 348         }
 349         return 0;
 350 }
 351
 352 int bcma_bus_resume(struct bcma_bus *bus)
 353 {
 354         struct bcma_device *core;
 355
 356         /* Init CC core */
 357         if (bus->drv_cc.core) {
 358                 bus->drv_cc.setup_done = false;
 359                 bcma_core_chipcommon_init(&bus->drv_cc);
 360         }
 361
 362         list_for_each_entry(core, &bus->cores, list) {
 363                 struct device_driver *drv = core->dev.driver;
 364                 if (drv) {
 365                         struct bcma_driver *adrv = container_of(drv, struct bcma_driver, drv);
 366                         if (adrv->resume)
 367                                 adrv->resume(core);
 368                 }
 369         }
 370
 371         return 0;
 372 }
 373 #endif
 374
 375 int __bcma_driver_register(struct bcma_driver *drv, struct module *owner)
 376 {
 377         drv->drv.name = drv->name;
 378         drv->drv.bus = &bcma_bus_type;
 379         drv->drv.owner = owner;
 380
 381         return driver_register(&drv->drv);
 382 }
 383 EXPORT_SYMBOL_GPL(__bcma_driver_register);
 384
 385 void bcma_driver_unregister(struct bcma_driver *drv)
 386 {
 387         driver_unregister(&drv->drv);
 388 }
 389 EXPORT_SYMBOL_GPL(bcma_driver_unregister);
 390
 391 static int bcma_bus_match(struct device *dev, struct device_driver *drv)
 392 {
 393         struct bcma_device *core = container_of(dev, struct bcma_device, dev);
 394         struct bcma_driver *adrv = container_of(drv, struct bcma_driver, drv);
 395         const struct bcma_device_id *cid = &core->id;
 396         const struct bcma_device_id *did;
 397
 398         for (did = adrv->id_table; did->manuf || did->id || did->rev; did++) {
 399             if ((did->manuf == cid->manuf || did->manuf == BCMA_ANY_MANUF) &&
 400                 (did->id == cid->id || did->id == BCMA_ANY_ID) &&
 401                 (did->rev == cid->rev || did->rev == BCMA_ANY_REV) &&
 402                 (did->class == cid->class || did->class == BCMA_ANY_CLASS))
 403                         return 1;
 404         }
 405         return 0;
 406 }
 407
 408 static int bcma_device_probe(struct device *dev)
 409 {
 410         struct bcma_device *core = container_of(dev, struct bcma_device, dev);
 411         struct bcma_driver *adrv = container_of(dev->driver, struct bcma_driver,
 412                                                drv);
 413         int err = 0;
 414
 415         if (adrv->probe)
 416                 err = adrv->probe(core);
 417
 418         return err;
 419 }
 420
 421 static int bcma_device_remove(struct device *dev)
 422 {
 423         struct bcma_device *core = container_of(dev, struct bcma_device, dev);
 424         struct bcma_driver *adrv = container_of(dev->driver, struct bcma_driver,
 425                                                drv);
 426
 427         if (adrv->remove)
 428                 adrv->remove(core);
 429
 430         return 0;
 431 }
 432
 433 static int bcma_device_uevent(struct device *dev, struct kobj_uevent_env *env)
 434 {
 435         struct bcma_device *core = container_of(dev, struct bcma_device, dev);
 436
 437         return add_uevent_var(env,
 438                               "MODALIAS=bcma:m%04Xid%04Xrev%02Xcl%02X",
 439                               core->id.manuf, core->id.id,
 440                               core->id.rev, core->id.class);
 441 }
 442
 443 static int __init bcma_modinit(void)
 444 {
 445         int err;
 446
 447         err = bus_register(&bcma_bus_type);
 448         if (err)
 449                 return err;
 450
 451 #ifdef CONFIG_BCMA_HOST_PCI
 452         err = bcma_host_pci_init();
 453         if (err) {
 454                 pr_err("PCI host initialization failed\n");
 455                 err = 0;
 456         }
 457 #endif
 458
 459         return err;
 460 }
 461 fs_initcall(bcma_modinit);
 462
 463 static void __exit bcma_modexit(void)
 464 {
 465 #ifdef CONFIG_BCMA_HOST_PCI
 466         bcma_host_pci_exit();
 467 #endif
 468         bus_unregister(&bcma_bus_type);
 469 }
 470 module_exit(bcma_modexit)