arch/powerpc/platforms/ps3/system-bus.c

   1 /*
   2  *  PS3 system bus driver.
   3  *
   4  *  Copyright (C) 2006 Sony Computer Entertainment Inc.
   5  *  Copyright 2006 Sony Corp.
   6  *
   7  *  This program is free software; you can redistribute it and/or modify
   8  *  it under the terms of the GNU General Public License as published by
   9  *  the Free Software Foundation; version 2 of the License.
  10  *
  11  *  This program is distributed in the hope that it will be useful,
  12  *  but WITHOUT ANY WARRANTY; without even the implied warranty of
  13  *  MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
  14  *  GNU General Public License for more details.
  15  *
  16  *  You should have received a copy of the GNU General Public License
  17  *  along with this program; if not, write to the Free Software
  18  *  Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA  02111-1307  USA
  19  */
  20
  21 #include <linux/kernel.h>
  22 #include <linux/init.h>
  23 #include <linux/module.h>
  24 #include <linux/dma-mapping.h>
  25 #include <linux/err.h>
  26
  27 #include <asm/udbg.h>
  28 #include <asm/lv1call.h>
  29 #include <asm/firmware.h>
  30
  31 #include "platform.h"
  32
  33 static struct device ps3_system_bus = {
  34         .bus_id = "ps3_system",
  35 };
  36
  37 /* FIXME: need device usage counters! */
  38 struct {
  39         struct mutex mutex;
  40         int sb_11; /* usb 0 */
  41         int sb_12; /* usb 0 */
  42         int gpu;
  43 } static usage_hack;
  44
  45 static int ps3_is_device(struct ps3_system_bus_device *dev,
  46                          unsigned int bus_id, unsigned int dev_id)
  47 {
  48         return dev->bus_id == bus_id && dev->dev_id == dev_id;
  49 }
  50
  51 static int ps3_open_hv_device_sb(struct ps3_system_bus_device *dev)
  52 {
  53         int result;
  54
  55         BUG_ON(!dev->bus_id);
  56         mutex_lock(&usage_hack.mutex);
  57
  58         if (ps3_is_device(dev, 1, 1)) {
  59                 usage_hack.sb_11++;
  60                 if (usage_hack.sb_11 > 1) {
  61                         result = 0;
  62                         goto done;
  63                 }
  64         }
  65
  66         if (ps3_is_device(dev, 1, 2)) {
  67                 usage_hack.sb_12++;
  68                 if (usage_hack.sb_12 > 1) {
  69                         result = 0;
  70                         goto done;
  71                 }
  72         }
  73
  74         result = lv1_open_device(dev->bus_id, dev->dev_id, 0);
  75
  76         if (result) {
  77                 pr_debug("%s:%d: lv1_open_device failed: %s\n", __func__,
  78                         __LINE__, ps3_result(result));
  79                         result = -EPERM;
  80         }
  81
  82 done:
  83         mutex_unlock(&usage_hack.mutex);
  84         return result;
  85 }
  86
  87 static int ps3_close_hv_device_sb(struct ps3_system_bus_device *dev)
  88 {
  89         int result;
  90
  91         BUG_ON(!dev->bus_id);
  92         mutex_lock(&usage_hack.mutex);
  93
  94         if (ps3_is_device(dev, 1, 1)) {
  95                 usage_hack.sb_11--;
  96                 if (usage_hack.sb_11) {
  97                         result = 0;
  98                         goto done;
  99                 }
 100         }
 101
 102         if (ps3_is_device(dev, 1, 2)) {
 103                 usage_hack.sb_12--;
 104                 if (usage_hack.sb_12) {
 105                         result = 0;
 106                         goto done;
 107                 }
 108         }
 109
 110         result = lv1_close_device(dev->bus_id, dev->dev_id);
 111         BUG_ON(result);
 112
 113 done:
 114         mutex_unlock(&usage_hack.mutex);
 115         return result;
 116 }
 117
 118 static int ps3_open_hv_device_gpu(struct ps3_system_bus_device *dev)
 119 {
 120         int result;
 121
 122         mutex_lock(&usage_hack.mutex);
 123
 124         usage_hack.gpu++;
 125         if (usage_hack.gpu > 1) {
 126                 result = 0;
 127                 goto done;
 128         }
 129
 130         result = lv1_gpu_open(0);
 131
 132         if (result) {
 133                 pr_debug("%s:%d: lv1_gpu_open failed: %s\n", __func__,
 134                         __LINE__, ps3_result(result));
 135                         result = -EPERM;
 136         }
 137
 138 done:
 139         mutex_unlock(&usage_hack.mutex);
 140         return result;
 141 }
 142
 143 static int ps3_close_hv_device_gpu(struct ps3_system_bus_device *dev)
 144 {
 145         int result;
 146
 147         mutex_lock(&usage_hack.mutex);
 148
 149         usage_hack.gpu--;
 150         if (usage_hack.gpu) {
 151                 result = 0;
 152                 goto done;
 153         }
 154
 155         result = lv1_gpu_close();
 156         BUG_ON(result);
 157
 158 done:
 159         mutex_unlock(&usage_hack.mutex);
 160         return result;
 161 }
 162
 163 int ps3_open_hv_device(struct ps3_system_bus_device *dev)
 164 {
 165         BUG_ON(!dev);
 166         pr_debug("%s:%d: match_id: %u\n", __func__, __LINE__, dev->match_id);
 167
 168         switch (dev->match_id) {
 169         case PS3_MATCH_ID_EHCI:
 170         case PS3_MATCH_ID_OHCI:
 171         case PS3_MATCH_ID_GELIC:
 172         case PS3_MATCH_ID_STOR_DISK:
 173         case PS3_MATCH_ID_STOR_ROM:
 174         case PS3_MATCH_ID_STOR_FLASH:
 175                 return ps3_open_hv_device_sb(dev);
 176
 177         case PS3_MATCH_ID_SOUND:
 178         case PS3_MATCH_ID_GRAPHICS:
 179                 return ps3_open_hv_device_gpu(dev);
 180
 181         case PS3_MATCH_ID_AV_SETTINGS:
 182         case PS3_MATCH_ID_SYSTEM_MANAGER:
 183                 pr_debug("%s:%d: unsupported match_id: %u\n", __func__,
 184                         __LINE__, dev->match_id);
 185                 pr_debug("%s:%d: bus_id: %u\n", __func__,
 186                         __LINE__, dev->bus_id);
 187                 BUG();
 188                 return -EINVAL;
 189
 190         default:
 191                 break;
 192         }
 193
 194         pr_debug("%s:%d: unknown match_id: %u\n", __func__, __LINE__,
 195                 dev->match_id);
 196         BUG();
 197         return -ENODEV;
 198 }
 199 EXPORT_SYMBOL_GPL(ps3_open_hv_device);
 200
 201 int ps3_close_hv_device(struct ps3_system_bus_device *dev)
 202 {
 203         BUG_ON(!dev);
 204         pr_debug("%s:%d: match_id: %u\n", __func__, __LINE__, dev->match_id);
 205
 206         switch (dev->match_id) {
 207         case PS3_MATCH_ID_EHCI:
 208         case PS3_MATCH_ID_OHCI:
 209         case PS3_MATCH_ID_GELIC:
 210         case PS3_MATCH_ID_STOR_DISK:
 211         case PS3_MATCH_ID_STOR_ROM:
 212         case PS3_MATCH_ID_STOR_FLASH:
 213                 return ps3_close_hv_device_sb(dev);
 214
 215         case PS3_MATCH_ID_SOUND:
 216         case PS3_MATCH_ID_GRAPHICS:
 217                 return ps3_close_hv_device_gpu(dev);
 218
 219         case PS3_MATCH_ID_AV_SETTINGS:
 220         case PS3_MATCH_ID_SYSTEM_MANAGER:
 221                 pr_debug("%s:%d: unsupported match_id: %u\n", __func__,
 222                         __LINE__, dev->match_id);
 223                 pr_debug("%s:%d: bus_id: %u\n", __func__,
 224                         __LINE__, dev->bus_id);
 225                 BUG();
 226                 return -EINVAL;
 227
 228         default:
 229                 break;
 230         }
 231
 232         pr_debug("%s:%d: unknown match_id: %u\n", __func__, __LINE__,
 233                 dev->match_id);
 234         BUG();
 235         return -ENODEV;
 236 }
 237 EXPORT_SYMBOL_GPL(ps3_close_hv_device);
 238
 239 #define dump_mmio_region(_a) _dump_mmio_region(_a, __func__, __LINE__)
 240 static void _dump_mmio_region(const struct ps3_mmio_region* r,
 241         const char* func, int line)
 242 {
 243         pr_debug("%s:%d: dev       %u:%u\n", func, line, r->dev->bus_id,
 244                 r->dev->dev_id);
 245         pr_debug("%s:%d: bus_addr  %lxh\n", func, line, r->bus_addr);
 246         pr_debug("%s:%d: len       %lxh\n", func, line, r->len);
 247         pr_debug("%s:%d: lpar_addr %lxh\n", func, line, r->lpar_addr);
 248 }
 249
 250 static int ps3_sb_mmio_region_create(struct ps3_mmio_region *r)
 251 {
 252         int result;
 253
 254         result = lv1_map_device_mmio_region(r->dev->bus_id, r->dev->dev_id,
 255                 r->bus_addr, r->len, r->page_size, &r->lpar_addr);
 256
 257         if (result) {
 258                 pr_debug("%s:%d: lv1_map_device_mmio_region failed: %s\n",
 259                         __func__, __LINE__, ps3_result(result));
 260                 r->lpar_addr = 0;
 261         }
 262
 263         dump_mmio_region(r);
 264         return result;
 265 }
 266
 267 static int ps3_ioc0_mmio_region_create(struct ps3_mmio_region *r)
 268 {
 269         /* device specific; do nothing currently */
 270         return 0;
 271 }
 272
 273 int ps3_mmio_region_create(struct ps3_mmio_region *r)
 274 {
 275         return r->mmio_ops->create(r);
 276 }
 277 EXPORT_SYMBOL_GPL(ps3_mmio_region_create);
 278
 279 static int ps3_sb_free_mmio_region(struct ps3_mmio_region *r)
 280 {
 281         int result;
 282
 283         dump_mmio_region(r);
 284 ;
 285         result = lv1_unmap_device_mmio_region(r->dev->bus_id, r->dev->dev_id,
 286                 r->lpar_addr);
 287
 288         if (result)
 289                 pr_debug("%s:%d: lv1_unmap_device_mmio_region failed: %s\n",
 290                         __func__, __LINE__, ps3_result(result));
 291
 292         r->lpar_addr = 0;
 293         return result;
 294 }
 295
 296 static int ps3_ioc0_free_mmio_region(struct ps3_mmio_region *r)
 297 {
 298         /* device specific; do nothing currently */
 299         return 0;
 300 }
 301
 302
 303 int ps3_free_mmio_region(struct ps3_mmio_region *r)
 304 {
 305         return r->mmio_ops->free(r);
 306 }
 307
 308 EXPORT_SYMBOL_GPL(ps3_free_mmio_region);
 309
 310 static const struct ps3_mmio_region_ops ps3_mmio_sb_region_ops = {
 311         .create = ps3_sb_mmio_region_create,
 312         .free = ps3_sb_free_mmio_region
 313 };
 314
 315 static const struct ps3_mmio_region_ops ps3_mmio_ioc0_region_ops = {
 316         .create = ps3_ioc0_mmio_region_create,
 317         .free = ps3_ioc0_free_mmio_region
 318 };
 319
 320 int ps3_mmio_region_init(struct ps3_system_bus_device *dev,
 321         struct ps3_mmio_region *r, unsigned long bus_addr, unsigned long len,
 322         enum ps3_mmio_page_size page_size)
 323 {
 324         r->dev = dev;
 325         r->bus_addr = bus_addr;
 326         r->len = len;
 327         r->page_size = page_size;
 328         switch (dev->dev_type) {
 329         case PS3_DEVICE_TYPE_SB:
 330                 r->mmio_ops = &ps3_mmio_sb_region_ops;
 331                 break;
 332         case PS3_DEVICE_TYPE_IOC0:
 333                 r->mmio_ops = &ps3_mmio_ioc0_region_ops;
 334                 break;
 335         default:
 336                 BUG();
 337                 return -EINVAL;
 338         }
 339         return 0;
 340 }
 341 EXPORT_SYMBOL_GPL(ps3_mmio_region_init);
 342
 343 static int ps3_system_bus_match(struct device *_dev,
 344         struct device_driver *_drv)
 345 {
 346         int result;
 347         struct ps3_system_bus_driver *drv = ps3_drv_to_system_bus_drv(_drv);
 348         struct ps3_system_bus_device *dev = ps3_dev_to_system_bus_dev(_dev);
 349
 350         result = dev->match_id == drv->match_id;
 351
 352         pr_info("%s:%d: dev=%u(%s), drv=%u(%s): %s\n", __func__, __LINE__,
 353                 dev->match_id, dev->core.bus_id, drv->match_id, drv->core.name,
 354                 (result ? "match" : "miss"));
 355         return result;
 356 }
 357
 358 static int ps3_system_bus_probe(struct device *_dev)
 359 {
 360         int result = 0;
 361         struct ps3_system_bus_device *dev = ps3_dev_to_system_bus_dev(_dev);
 362         struct ps3_system_bus_driver *drv;
 363
 364         BUG_ON(!dev);
 365         pr_info(" -> %s:%d: %s\n", __func__, __LINE__, _dev->bus_id);
 366
 367         drv = ps3_system_bus_dev_to_system_bus_drv(dev);
 368         BUG_ON(!drv);
 369
 370         if (drv->probe)
 371                 result = drv->probe(dev);
 372         else
 373                 pr_info("%s:%d: %s no probe method\n", __func__, __LINE__,
 374                         dev->core.bus_id);
 375
 376         pr_info(" <- %s:%d: %s\n", __func__, __LINE__, dev->core.bus_id);
 377         return result;
 378 }
 379
 380 static int ps3_system_bus_remove(struct device *_dev)
 381 {
 382         int result = 0;
 383         struct ps3_system_bus_device *dev = ps3_dev_to_system_bus_dev(_dev);
 384         struct ps3_system_bus_driver *drv;
 385
 386         BUG_ON(!dev);
 387         pr_info(" -> %s:%d: %s\n", __func__, __LINE__, _dev->bus_id);
 388
 389         drv = ps3_system_bus_dev_to_system_bus_drv(dev);
 390         BUG_ON(!drv);
 391
 392         if (drv->remove)
 393                 result = drv->remove(dev);
 394         else
 395                 dev_dbg(&dev->core, "%s:%d %s: no remove method\n",
 396                         __func__, __LINE__, drv->core.name);
 397
 398         pr_info(" <- %s:%d: %s\n", __func__, __LINE__, dev->core.bus_id);
 399         return result;
 400 }
 401
 402 static void ps3_system_bus_shutdown(struct device *_dev)
 403 {
 404         struct ps3_system_bus_device *dev = ps3_dev_to_system_bus_dev(_dev);
 405         struct ps3_system_bus_driver *drv;
 406
 407         BUG_ON(!dev);
 408
 409         dev_dbg(&dev->core, " -> %s:%d: match_id %d\n", __func__, __LINE__,
 410                 dev->match_id);
 411
 412         if (!dev->core.driver) {
 413                 dev_dbg(&dev->core, "%s:%d: no driver bound\n", __func__,
 414                         __LINE__);
 415                 return;
 416         }
 417
 418         drv = ps3_system_bus_dev_to_system_bus_drv(dev);
 419
 420         BUG_ON(!drv);
 421
 422         dev_dbg(&dev->core, "%s:%d: %s -> %s\n", __func__, __LINE__,
 423                 dev->core.bus_id, drv->core.name);
 424
 425         if (drv->shutdown)
 426                 drv->shutdown(dev);
 427         else if (drv->remove) {
 428                 dev_dbg(&dev->core, "%s:%d %s: no shutdown, calling remove\n",
 429                         __func__, __LINE__, drv->core.name);
 430                 drv->remove(dev);
 431         } else {
 432                 dev_dbg(&dev->core, "%s:%d %s: no shutdown method\n",
 433                         __func__, __LINE__, drv->core.name);
 434                 BUG();
 435         }
 436
 437         dev_dbg(&dev->core, " <- %s:%d\n", __func__, __LINE__);
 438 }
 439
 440 static int ps3_system_bus_uevent(struct device *_dev, struct kobj_uevent_env *env)
 441 {
 442         struct ps3_system_bus_device *dev = ps3_dev_to_system_bus_dev(_dev);
 443
 444         if (add_uevent_var(env, "MODALIAS=ps3:%d", dev->match_id))
 445                 return -ENOMEM;
 446         return 0;
 447 }
 448
 449 static ssize_t modalias_show(struct device *_dev, struct device_attribute *a,
 450         char *buf)
 451 {
 452         struct ps3_system_bus_device *dev = ps3_dev_to_system_bus_dev(_dev);
 453         int len = snprintf(buf, PAGE_SIZE, "ps3:%d\n", dev->match_id);
 454
 455         return (len >= PAGE_SIZE) ? (PAGE_SIZE - 1) : len;
 456 }
 457
 458 static struct device_attribute ps3_system_bus_dev_attrs[] = {
 459         __ATTR_RO(modalias),
 460         __ATTR_NULL,
 461 };
 462
 463 struct bus_type ps3_system_bus_type = {
 464         .name = "ps3_system_bus",
 465         .match = ps3_system_bus_match,
 466         .uevent = ps3_system_bus_uevent,
 467         .probe = ps3_system_bus_probe,
 468         .remove = ps3_system_bus_remove,
 469         .shutdown = ps3_system_bus_shutdown,
 470         .dev_attrs = ps3_system_bus_dev_attrs,
 471 };
 472
 473 static int __init ps3_system_bus_init(void)
 474 {
 475         int result;
 476
 477         if (!firmware_has_feature(FW_FEATURE_PS3_LV1))
 478                 return -ENODEV;
 479
 480         pr_debug(" -> %s:%d\n", __func__, __LINE__);
 481
 482         mutex_init(&usage_hack.mutex);
 483
 484         result = device_register(&ps3_system_bus);
 485         BUG_ON(result);
 486
 487         result = bus_register(&ps3_system_bus_type);
 488         BUG_ON(result);
 489
 490         pr_debug(" <- %s:%d\n", __func__, __LINE__);
 491         return result;
 492 }
 493
 494 core_initcall(ps3_system_bus_init);
 495
 496 /* Allocates a contiguous real buffer and creates mappings over it.
 497  * Returns the virtual address of the buffer and sets dma_handle
 498  * to the dma address (mapping) of the first page.
 499  */
 500 static void * ps3_alloc_coherent(struct device *_dev, size_t size,
 501                                       dma_addr_t *dma_handle, gfp_t flag)
 502 {
 503         int result;
 504         struct ps3_system_bus_device *dev = ps3_dev_to_system_bus_dev(_dev);
 505         unsigned long virt_addr;
 506
 507         flag &= ~(__GFP_DMA | __GFP_HIGHMEM);
 508         flag |= __GFP_ZERO;
 509
 510         virt_addr = __get_free_pages(flag, get_order(size));
 511
 512         if (!virt_addr) {
 513                 pr_debug("%s:%d: get_free_pages failed\n", __func__, __LINE__);
 514                 goto clean_none;
 515         }
 516
 517         result = ps3_dma_map(dev->d_region, virt_addr, size, dma_handle,
 518                              IOPTE_PP_W | IOPTE_PP_R | IOPTE_SO_RW | IOPTE_M);
 519
 520         if (result) {
 521                 pr_debug("%s:%d: ps3_dma_map failed (%d)\n",
 522                         __func__, __LINE__, result);
 523                 BUG_ON("check region type");
 524                 goto clean_alloc;
 525         }
 526
 527         return (void*)virt_addr;
 528
 529 clean_alloc:
 530         free_pages(virt_addr, get_order(size));
 531 clean_none:
 532         dma_handle = NULL;
 533         return NULL;
 534 }
 535
 536 static void ps3_free_coherent(struct device *_dev, size_t size, void *vaddr,
 537         dma_addr_t dma_handle)
 538 {
 539         struct ps3_system_bus_device *dev = ps3_dev_to_system_bus_dev(_dev);
 540
 541         ps3_dma_unmap(dev->d_region, dma_handle, size);
 542         free_pages((unsigned long)vaddr, get_order(size));
 543 }
 544
 545 /* Creates TCEs for a user provided buffer.  The user buffer must be
 546  * contiguous real kernel storage (not vmalloc).  The address of the buffer
 547  * passed here is the kernel (virtual) address of the buffer.  The buffer
 548  * need not be page aligned, the dma_addr_t returned will point to the same
 549  * byte within the page as vaddr.
 550  */
 551
 552 static dma_addr_t ps3_sb_map_single(struct device *_dev, void *ptr, size_t size,
 553         enum dma_data_direction direction)
 554 {
 555         struct ps3_system_bus_device *dev = ps3_dev_to_system_bus_dev(_dev);
 556         int result;
 557         unsigned long bus_addr;
 558
 559         result = ps3_dma_map(dev->d_region, (unsigned long)ptr, size,
 560                              &bus_addr,
 561                              IOPTE_PP_R | IOPTE_PP_W | IOPTE_SO_RW | IOPTE_M);
 562
 563         if (result) {
 564                 pr_debug("%s:%d: ps3_dma_map failed (%d)\n",
 565                         __func__, __LINE__, result);
 566         }
 567
 568         return bus_addr;
 569 }
 570
 571 static dma_addr_t ps3_ioc0_map_single(struct device *_dev, void *ptr,
 572                                       size_t size,
 573                                       enum dma_data_direction direction)
 574 {
 575         struct ps3_system_bus_device *dev = ps3_dev_to_system_bus_dev(_dev);
 576         int result;
 577         unsigned long bus_addr;
 578         u64 iopte_flag;
 579
 580         iopte_flag = IOPTE_M;
 581         switch (direction) {
 582         case DMA_BIDIRECTIONAL:
 583                 iopte_flag |= IOPTE_PP_R | IOPTE_PP_W | IOPTE_SO_RW;
 584                 break;
 585         case DMA_TO_DEVICE:
 586                 iopte_flag |= IOPTE_PP_R | IOPTE_SO_R;
 587                 break;
 588         case DMA_FROM_DEVICE:
 589                 iopte_flag |= IOPTE_PP_W | IOPTE_SO_RW;
 590                 break;
 591         default:
 592                 /* not happned */
 593                 BUG();
 594         };
 595         result = ps3_dma_map(dev->d_region, (unsigned long)ptr, size,
 596                              &bus_addr, iopte_flag);
 597
 598         if (result) {
 599                 pr_debug("%s:%d: ps3_dma_map failed (%d)\n",
 600                         __func__, __LINE__, result);
 601         }
 602         return bus_addr;
 603 }
 604
 605 static void ps3_unmap_single(struct device *_dev, dma_addr_t dma_addr,
 606         size_t size, enum dma_data_direction direction)
 607 {
 608         struct ps3_system_bus_device *dev = ps3_dev_to_system_bus_dev(_dev);
 609         int result;
 610
 611         result = ps3_dma_unmap(dev->d_region, dma_addr, size);
 612
 613         if (result) {
 614                 pr_debug("%s:%d: ps3_dma_unmap failed (%d)\n",
 615                         __func__, __LINE__, result);
 616         }
 617 }
 618
 619 static int ps3_sb_map_sg(struct device *_dev, struct scatterlist *sg, int nents,
 620         enum dma_data_direction direction)
 621 {
 622 #if defined(CONFIG_PS3_DYNAMIC_DMA)
 623         BUG_ON("do");
 624         return -EPERM;
 625 #else
 626         struct ps3_system_bus_device *dev = ps3_dev_to_system_bus_dev(_dev);
 627         int i;
 628
 629         for (i = 0; i < nents; i++, sg++) {
 630                 int result = ps3_dma_map(dev->d_region,
 631                         page_to_phys(sg->page) + sg->offset, sg->length,
 632                                          &sg->dma_address, 0);
 633
 634                 if (result) {
 635                         pr_debug("%s:%d: ps3_dma_map failed (%d)\n",
 636                                 __func__, __LINE__, result);
 637                         return -EINVAL;
 638                 }
 639
 640                 sg->dma_length = sg->length;
 641         }
 642
 643         return nents;
 644 #endif
 645 }
 646
 647 static int ps3_ioc0_map_sg(struct device *_dev, struct scatterlist *sg,
 648                            int nents,
 649                            enum dma_data_direction direction)
 650 {
 651         BUG();
 652         return 0;
 653 }
 654
 655 static void ps3_sb_unmap_sg(struct device *_dev, struct scatterlist *sg,
 656         int nents, enum dma_data_direction direction)
 657 {
 658 #if defined(CONFIG_PS3_DYNAMIC_DMA)
 659         BUG_ON("do");
 660 #endif
 661 }
 662
 663 static void ps3_ioc0_unmap_sg(struct device *_dev, struct scatterlist *sg,
 664                             int nents, enum dma_data_direction direction)
 665 {
 666         BUG();
 667 }
 668
 669 static int ps3_dma_supported(struct device *_dev, u64 mask)
 670 {
 671         return mask >= DMA_32BIT_MASK;
 672 }
 673
 674 static struct dma_mapping_ops ps3_sb_dma_ops = {
 675         .alloc_coherent = ps3_alloc_coherent,
 676         .free_coherent = ps3_free_coherent,
 677         .map_single = ps3_sb_map_single,
 678         .unmap_single = ps3_unmap_single,
 679         .map_sg = ps3_sb_map_sg,
 680         .unmap_sg = ps3_sb_unmap_sg,
 681         .dma_supported = ps3_dma_supported
 682 };
 683
 684 static struct dma_mapping_ops ps3_ioc0_dma_ops = {
 685         .alloc_coherent = ps3_alloc_coherent,
 686         .free_coherent = ps3_free_coherent,
 687         .map_single = ps3_ioc0_map_single,
 688         .unmap_single = ps3_unmap_single,
 689         .map_sg = ps3_ioc0_map_sg,
 690         .unmap_sg = ps3_ioc0_unmap_sg,
 691         .dma_supported = ps3_dma_supported
 692 };
 693
 694 /**
 695  * ps3_system_bus_release_device - remove a device from the system bus
 696  */
 697
 698 static void ps3_system_bus_release_device(struct device *_dev)
 699 {
 700         struct ps3_system_bus_device *dev = ps3_dev_to_system_bus_dev(_dev);
 701         kfree(dev);
 702 }
 703
 704 /**
 705  * ps3_system_bus_device_register - add a device to the system bus
 706  *
 707  * ps3_system_bus_device_register() expects the dev object to be allocated
 708  * dynamically by the caller.  The system bus takes ownership of the dev
 709  * object and frees the object in ps3_system_bus_release_device().
 710  */
 711
 712 int ps3_system_bus_device_register(struct ps3_system_bus_device *dev)
 713 {
 714         int result;
 715         static unsigned int dev_ioc0_count;
 716         static unsigned int dev_sb_count;
 717         static unsigned int dev_vuart_count;
 718
 719         if (!dev->core.parent)
 720                 dev->core.parent = &ps3_system_bus;
 721         dev->core.bus = &ps3_system_bus_type;
 722         dev->core.release = ps3_system_bus_release_device;
 723
 724         switch (dev->dev_type) {
 725         case PS3_DEVICE_TYPE_IOC0:
 726                 dev->core.archdata.dma_ops = &ps3_ioc0_dma_ops;
 727                 snprintf(dev->core.bus_id, sizeof(dev->core.bus_id),
 728                         "ioc0_%02x", ++dev_ioc0_count);
 729                 break;
 730         case PS3_DEVICE_TYPE_SB:
 731                 dev->core.archdata.dma_ops = &ps3_sb_dma_ops;
 732                 snprintf(dev->core.bus_id, sizeof(dev->core.bus_id),
 733                         "sb_%02x", ++dev_sb_count);
 734
 735                 break;
 736         case PS3_DEVICE_TYPE_VUART:
 737                 snprintf(dev->core.bus_id, sizeof(dev->core.bus_id),
 738                         "vuart_%02x", ++dev_vuart_count);
 739                 break;
 740         default:
 741                 BUG();
 742         };
 743
 744         dev->core.archdata.of_node = NULL;
 745         dev->core.archdata.numa_node = 0;
 746
 747         pr_debug("%s:%d add %s\n", __func__, __LINE__, dev->core.bus_id);
 748
 749         result = device_register(&dev->core);
 750         return result;
 751 }
 752
 753 EXPORT_SYMBOL_GPL(ps3_system_bus_device_register);
 754
 755 int ps3_system_bus_driver_register(struct ps3_system_bus_driver *drv)
 756 {
 757         int result;
 758
 759         pr_debug(" -> %s:%d: %s\n", __func__, __LINE__, drv->core.name);
 760
 761         if (!firmware_has_feature(FW_FEATURE_PS3_LV1))
 762                 return -ENODEV;
 763
 764         drv->core.bus = &ps3_system_bus_type;
 765
 766         result = driver_register(&drv->core);
 767         pr_debug(" <- %s:%d: %s\n", __func__, __LINE__, drv->core.name);
 768         return result;
 769 }
 770
 771 EXPORT_SYMBOL_GPL(ps3_system_bus_driver_register);
 772
 773 void ps3_system_bus_driver_unregister(struct ps3_system_bus_driver *drv)
 774 {
 775         pr_debug(" -> %s:%d: %s\n", __func__, __LINE__, drv->core.name);
 776         driver_unregister(&drv->core);
 777         pr_debug(" <- %s:%d: %s\n", __func__, __LINE__, drv->core.name);
 778 }
 779
 780 EXPORT_SYMBOL_GPL(ps3_system_bus_driver_unregister);