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 void bcma_release_core_dev(struct device *dev)
  85 {
  86         struct bcma_device *core = container_of(dev, struct bcma_device, dev);
  87         if (core->io_addr)
  88                 iounmap(core->io_addr);
  89         if (core->io_wrap)
  90                 iounmap(core->io_wrap);
  91         kfree(core);
  92 }
  93
  94 static int bcma_register_cores(struct bcma_bus *bus)
  95 {
  96         struct bcma_device *core;
  97         int err, dev_id = 0;
  98
  99         list_for_each_entry(core, &bus->cores, list) {
 100                 /* We support that cores ourself */
 101                 switch (core->id.id) {
 102                 case BCMA_CORE_4706_CHIPCOMMON:
 103                 case BCMA_CORE_CHIPCOMMON:
 104                 case BCMA_CORE_PCI:
 105                 case BCMA_CORE_PCIE:
 106                 case BCMA_CORE_MIPS_74K:
 107                 case BCMA_CORE_4706_MAC_GBIT_COMMON:
 108                         continue;
 109                 }
 110
 111                 core->dev.release = bcma_release_core_dev;
 112                 core->dev.bus = &bcma_bus_type;
 113                 dev_set_name(&core->dev, "bcma%d:%d", bus->num, dev_id);
 114
 115                 switch (bus->hosttype) {
 116                 case BCMA_HOSTTYPE_PCI:
 117                         core->dev.parent = &bus->host_pci->dev;
 118                         core->dma_dev = &bus->host_pci->dev;
 119                         core->irq = bus->host_pci->irq;
 120                         break;
 121                 case BCMA_HOSTTYPE_SOC:
 122                         core->dev.dma_mask = &core->dev.coherent_dma_mask;
 123                         core->dma_dev = &core->dev;
 124                         break;
 125                 case BCMA_HOSTTYPE_SDIO:
 126                         break;
 127                 }
 128
 129                 err = device_register(&core->dev);
 130                 if (err) {
 131                         bcma_err(bus,
 132                                  "Could not register dev for core 0x%03X\n",
 133                                  core->id.id);
 134                         continue;
 135                 }
 136                 core->dev_registered = true;
 137                 dev_id++;
 138         }
 139
 140 #ifdef CONFIG_BCMA_SFLASH
 141         if (bus->drv_cc.sflash.present) {
 142                 err = platform_device_register(&bcma_sflash_dev);
 143                 if (err)
 144                         bcma_err(bus, "Error registering serial flash\n");
 145         }
 146 #endif
 147
 148 #ifdef CONFIG_BCMA_NFLASH
 149         if (bus->drv_cc.nflash.present) {
 150                 err = platform_device_register(&bcma_nflash_dev);
 151                 if (err)
 152                         bcma_err(bus, "Error registering NAND flash\n");
 153         }
 154 #endif
 155
 156         return 0;
 157 }
 158
 159 static void bcma_unregister_cores(struct bcma_bus *bus)
 160 {
 161         struct bcma_device *core;
 162
 163         list_for_each_entry(core, &bus->cores, list) {
 164                 if (core->dev_registered)
 165                         device_unregister(&core->dev);
 166         }
 167 }
 168
 169 int __devinit bcma_bus_register(struct bcma_bus *bus)
 170 {
 171         int err;
 172         struct bcma_device *core;
 173
 174         mutex_lock(&bcma_buses_mutex);
 175         bus->num = bcma_bus_next_num++;
 176         mutex_unlock(&bcma_buses_mutex);
 177
 178         /* Scan for devices (cores) */
 179         err = bcma_bus_scan(bus);
 180         if (err) {
 181                 bcma_err(bus, "Failed to scan: %d\n", err);
 182                 return -1;
 183         }
 184
 185         /* Init CC core */
 186         core = bcma_find_core(bus, bcma_cc_core_id(bus));
 187         if (core) {
 188                 bus->drv_cc.core = core;
 189                 bcma_core_chipcommon_init(&bus->drv_cc);
 190         }
 191
 192         /* Init MIPS core */
 193         core = bcma_find_core(bus, BCMA_CORE_MIPS_74K);
 194         if (core) {
 195                 bus->drv_mips.core = core;
 196                 bcma_core_mips_init(&bus->drv_mips);
 197         }
 198
 199         /* Init PCIE core */
 200         core = bcma_find_core(bus, BCMA_CORE_PCIE);
 201         if (core) {
 202                 bus->drv_pci.core = core;
 203                 bcma_core_pci_init(&bus->drv_pci);
 204         }
 205
 206         /* Init GBIT MAC COMMON core */
 207         core = bcma_find_core(bus, BCMA_CORE_4706_MAC_GBIT_COMMON);
 208         if (core) {
 209                 bus->drv_gmac_cmn.core = core;
 210                 bcma_core_gmac_cmn_init(&bus->drv_gmac_cmn);
 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         /* Register found cores */
 221         bcma_register_cores(bus);
 222
 223         bcma_info(bus, "Bus registered\n");
 224
 225         return 0;
 226 }
 227
 228 void bcma_bus_unregister(struct bcma_bus *bus)
 229 {
 230         struct bcma_device *cores[3];
 231
 232         cores[0] = bcma_find_core(bus, BCMA_CORE_MIPS_74K);
 233         cores[1] = bcma_find_core(bus, BCMA_CORE_PCIE);
 234         cores[2] = bcma_find_core(bus, BCMA_CORE_4706_MAC_GBIT_COMMON);
 235
 236         bcma_unregister_cores(bus);
 237
 238         kfree(cores[2]);
 239         kfree(cores[1]);
 240         kfree(cores[0]);
 241 }
 242
 243 int __init bcma_bus_early_register(struct bcma_bus *bus,
 244                                    struct bcma_device *core_cc,
 245                                    struct bcma_device *core_mips)
 246 {
 247         int err;
 248         struct bcma_device *core;
 249         struct bcma_device_id match;
 250
 251         bcma_init_bus(bus);
 252
 253         match.manuf = BCMA_MANUF_BCM;
 254         match.id = bcma_cc_core_id(bus);
 255         match.class = BCMA_CL_SIM;
 256         match.rev = BCMA_ANY_REV;
 257
 258         /* Scan for chip common core */
 259         err = bcma_bus_scan_early(bus, &match, core_cc);
 260         if (err) {
 261                 bcma_err(bus, "Failed to scan for common core: %d\n", err);
 262                 return -1;
 263         }
 264
 265         match.manuf = BCMA_MANUF_MIPS;
 266         match.id = BCMA_CORE_MIPS_74K;
 267         match.class = BCMA_CL_SIM;
 268         match.rev = BCMA_ANY_REV;
 269
 270         /* Scan for mips core */
 271         err = bcma_bus_scan_early(bus, &match, core_mips);
 272         if (err) {
 273                 bcma_err(bus, "Failed to scan for mips core: %d\n", err);
 274                 return -1;
 275         }
 276
 277         /* Init CC core */
 278         core = bcma_find_core(bus, bcma_cc_core_id(bus));
 279         if (core) {
 280                 bus->drv_cc.core = core;
 281                 bcma_core_chipcommon_init(&bus->drv_cc);
 282         }
 283
 284         /* Init MIPS core */
 285         core = bcma_find_core(bus, BCMA_CORE_MIPS_74K);
 286         if (core) {
 287                 bus->drv_mips.core = core;
 288                 bcma_core_mips_init(&bus->drv_mips);
 289         }
 290
 291         bcma_info(bus, "Early bus registered\n");
 292
 293         return 0;
 294 }
 295
 296 #ifdef CONFIG_PM
 297 int bcma_bus_suspend(struct bcma_bus *bus)
 298 {
 299         struct bcma_device *core;
 300
 301         list_for_each_entry(core, &bus->cores, list) {
 302                 struct device_driver *drv = core->dev.driver;
 303                 if (drv) {
 304                         struct bcma_driver *adrv = container_of(drv, struct bcma_driver, drv);
 305                         if (adrv->suspend)
 306                                 adrv->suspend(core);
 307                 }
 308         }
 309         return 0;
 310 }
 311
 312 int bcma_bus_resume(struct bcma_bus *bus)
 313 {
 314         struct bcma_device *core;
 315
 316         /* Init CC core */
 317         if (bus->drv_cc.core) {
 318                 bus->drv_cc.setup_done = false;
 319                 bcma_core_chipcommon_init(&bus->drv_cc);
 320         }
 321
 322         list_for_each_entry(core, &bus->cores, list) {
 323                 struct device_driver *drv = core->dev.driver;
 324                 if (drv) {
 325                         struct bcma_driver *adrv = container_of(drv, struct bcma_driver, drv);
 326                         if (adrv->resume)
 327                                 adrv->resume(core);
 328                 }
 329         }
 330
 331         return 0;
 332 }
 333 #endif
 334
 335 int __bcma_driver_register(struct bcma_driver *drv, struct module *owner)
 336 {
 337         drv->drv.name = drv->name;
 338         drv->drv.bus = &bcma_bus_type;
 339         drv->drv.owner = owner;
 340
 341         return driver_register(&drv->drv);
 342 }
 343 EXPORT_SYMBOL_GPL(__bcma_driver_register);
 344
 345 void bcma_driver_unregister(struct bcma_driver *drv)
 346 {
 347         driver_unregister(&drv->drv);
 348 }
 349 EXPORT_SYMBOL_GPL(bcma_driver_unregister);
 350
 351 static int bcma_bus_match(struct device *dev, struct device_driver *drv)
 352 {
 353         struct bcma_device *core = container_of(dev, struct bcma_device, dev);
 354         struct bcma_driver *adrv = container_of(drv, struct bcma_driver, drv);
 355         const struct bcma_device_id *cid = &core->id;
 356         const struct bcma_device_id *did;
 357
 358         for (did = adrv->id_table; did->manuf || did->id || did->rev; did++) {
 359             if ((did->manuf == cid->manuf || did->manuf == BCMA_ANY_MANUF) &&
 360                 (did->id == cid->id || did->id == BCMA_ANY_ID) &&
 361                 (did->rev == cid->rev || did->rev == BCMA_ANY_REV) &&
 362                 (did->class == cid->class || did->class == BCMA_ANY_CLASS))
 363                         return 1;
 364         }
 365         return 0;
 366 }
 367
 368 static int bcma_device_probe(struct device *dev)
 369 {
 370         struct bcma_device *core = container_of(dev, struct bcma_device, dev);
 371         struct bcma_driver *adrv = container_of(dev->driver, struct bcma_driver,
 372                                                drv);
 373         int err = 0;
 374
 375         if (adrv->probe)
 376                 err = adrv->probe(core);
 377
 378         return err;
 379 }
 380
 381 static int bcma_device_remove(struct device *dev)
 382 {
 383         struct bcma_device *core = container_of(dev, struct bcma_device, dev);
 384         struct bcma_driver *adrv = container_of(dev->driver, struct bcma_driver,
 385                                                drv);
 386
 387         if (adrv->remove)
 388                 adrv->remove(core);
 389
 390         return 0;
 391 }
 392
 393 static int bcma_device_uevent(struct device *dev, struct kobj_uevent_env *env)
 394 {
 395         struct bcma_device *core = container_of(dev, struct bcma_device, dev);
 396
 397         return add_uevent_var(env,
 398                               "MODALIAS=bcma:m%04Xid%04Xrev%02Xcl%02X",
 399                               core->id.manuf, core->id.id,
 400                               core->id.rev, core->id.class);
 401 }
 402
 403 static int __init bcma_modinit(void)
 404 {
 405         int err;
 406
 407         err = bus_register(&bcma_bus_type);
 408         if (err)
 409                 return err;
 410
 411 #ifdef CONFIG_BCMA_HOST_PCI
 412         err = bcma_host_pci_init();
 413         if (err) {
 414                 pr_err("PCI host initialization failed\n");
 415                 err = 0;
 416         }
 417 #endif
 418
 419         return err;
 420 }
 421 fs_initcall(bcma_modinit);
 422
 423 static void __exit bcma_modexit(void)
 424 {
 425 #ifdef CONFIG_BCMA_HOST_PCI
 426         bcma_host_pci_exit();
 427 #endif
 428         bus_unregister(&bcma_bus_type);
 429 }
 430 module_exit(bcma_modexit)