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, u64 bus_id,
  46                          u64 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: %lu\n", __func__, __LINE__,
 186                         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: %lu\n", __func__, __LINE__,
 224                         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       %lu:%lu\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         if (result)
 353                 pr_info("%s:%d: dev=%u(%s), drv=%u(%s): match\n", __func__,
 354                         __LINE__, dev->match_id, dev->core.bus_id,
 355                         drv->match_id, drv->core.name);
 356         else
 357                 pr_debug("%s:%d: dev=%u(%s), drv=%u(%s): miss\n", __func__,
 358                         __LINE__, dev->match_id, dev->core.bus_id,
 359                         drv->match_id, drv->core.name);
 360         return result;
 361 }
 362
 363 static int ps3_system_bus_probe(struct device *_dev)
 364 {
 365         int result = 0;
 366         struct ps3_system_bus_device *dev = ps3_dev_to_system_bus_dev(_dev);
 367         struct ps3_system_bus_driver *drv;
 368
 369         BUG_ON(!dev);
 370         pr_debug(" -> %s:%d: %s\n", __func__, __LINE__, _dev->bus_id);
 371
 372         drv = ps3_system_bus_dev_to_system_bus_drv(dev);
 373         BUG_ON(!drv);
 374
 375         if (drv->probe)
 376                 result = drv->probe(dev);
 377         else
 378                 pr_debug("%s:%d: %s no probe method\n", __func__, __LINE__,
 379                         dev->core.bus_id);
 380
 381         pr_debug(" <- %s:%d: %s\n", __func__, __LINE__, dev->core.bus_id);
 382         return result;
 383 }
 384
 385 static int ps3_system_bus_remove(struct device *_dev)
 386 {
 387         int result = 0;
 388         struct ps3_system_bus_device *dev = ps3_dev_to_system_bus_dev(_dev);
 389         struct ps3_system_bus_driver *drv;
 390
 391         BUG_ON(!dev);
 392         pr_debug(" -> %s:%d: %s\n", __func__, __LINE__, _dev->bus_id);
 393
 394         drv = ps3_system_bus_dev_to_system_bus_drv(dev);
 395         BUG_ON(!drv);
 396
 397         if (drv->remove)
 398                 result = drv->remove(dev);
 399         else
 400                 dev_dbg(&dev->core, "%s:%d %s: no remove method\n",
 401                         __func__, __LINE__, drv->core.name);
 402
 403         pr_debug(" <- %s:%d: %s\n", __func__, __LINE__, dev->core.bus_id);
 404         return result;
 405 }
 406
 407 static void ps3_system_bus_shutdown(struct device *_dev)
 408 {
 409         struct ps3_system_bus_device *dev = ps3_dev_to_system_bus_dev(_dev);
 410         struct ps3_system_bus_driver *drv;
 411
 412         BUG_ON(!dev);
 413
 414         dev_dbg(&dev->core, " -> %s:%d: match_id %d\n", __func__, __LINE__,
 415                 dev->match_id);
 416
 417         if (!dev->core.driver) {
 418                 dev_dbg(&dev->core, "%s:%d: no driver bound\n", __func__,
 419                         __LINE__);
 420                 return;
 421         }
 422
 423         drv = ps3_system_bus_dev_to_system_bus_drv(dev);
 424
 425         BUG_ON(!drv);
 426
 427         dev_dbg(&dev->core, "%s:%d: %s -> %s\n", __func__, __LINE__,
 428                 dev->core.bus_id, drv->core.name);
 429
 430         if (drv->shutdown)
 431                 drv->shutdown(dev);
 432         else if (drv->remove) {
 433                 dev_dbg(&dev->core, "%s:%d %s: no shutdown, calling remove\n",
 434                         __func__, __LINE__, drv->core.name);
 435                 drv->remove(dev);
 436         } else {
 437                 dev_dbg(&dev->core, "%s:%d %s: no shutdown method\n",
 438                         __func__, __LINE__, drv->core.name);
 439                 BUG();
 440         }
 441
 442         dev_dbg(&dev->core, " <- %s:%d\n", __func__, __LINE__);
 443 }
 444
 445 static int ps3_system_bus_uevent(struct device *_dev, struct kobj_uevent_env *env)
 446 {
 447         struct ps3_system_bus_device *dev = ps3_dev_to_system_bus_dev(_dev);
 448
 449         if (add_uevent_var(env, "MODALIAS=ps3:%d", dev->match_id))
 450                 return -ENOMEM;
 451         return 0;
 452 }
 453
 454 static ssize_t modalias_show(struct device *_dev, struct device_attribute *a,
 455         char *buf)
 456 {
 457         struct ps3_system_bus_device *dev = ps3_dev_to_system_bus_dev(_dev);
 458         int len = snprintf(buf, PAGE_SIZE, "ps3:%d\n", dev->match_id);
 459
 460         return (len >= PAGE_SIZE) ? (PAGE_SIZE - 1) : len;
 461 }
 462
 463 static struct device_attribute ps3_system_bus_dev_attrs[] = {
 464         __ATTR_RO(modalias),
 465         __ATTR_NULL,
 466 };
 467
 468 struct bus_type ps3_system_bus_type = {
 469         .name = "ps3_system_bus",
 470         .match = ps3_system_bus_match,
 471         .uevent = ps3_system_bus_uevent,
 472         .probe = ps3_system_bus_probe,
 473         .remove = ps3_system_bus_remove,
 474         .shutdown = ps3_system_bus_shutdown,
 475         .dev_attrs = ps3_system_bus_dev_attrs,
 476 };
 477
 478 static int __init ps3_system_bus_init(void)
 479 {
 480         int result;
 481
 482         if (!firmware_has_feature(FW_FEATURE_PS3_LV1))
 483                 return -ENODEV;
 484
 485         pr_debug(" -> %s:%d\n", __func__, __LINE__);
 486
 487         mutex_init(&usage_hack.mutex);
 488
 489         result = device_register(&ps3_system_bus);
 490         BUG_ON(result);
 491
 492         result = bus_register(&ps3_system_bus_type);
 493         BUG_ON(result);
 494
 495         pr_debug(" <- %s:%d\n", __func__, __LINE__);
 496         return result;
 497 }
 498
 499 core_initcall(ps3_system_bus_init);
 500
 501 /* Allocates a contiguous real buffer and creates mappings over it.
 502  * Returns the virtual address of the buffer and sets dma_handle
 503  * to the dma address (mapping) of the first page.
 504  */
 505 static void * ps3_alloc_coherent(struct device *_dev, size_t size,
 506                                       dma_addr_t *dma_handle, gfp_t flag)
 507 {
 508         int result;
 509         struct ps3_system_bus_device *dev = ps3_dev_to_system_bus_dev(_dev);
 510         unsigned long virt_addr;
 511
 512         flag &= ~(__GFP_DMA | __GFP_HIGHMEM);
 513         flag |= __GFP_ZERO;
 514
 515         virt_addr = __get_free_pages(flag, get_order(size));
 516
 517         if (!virt_addr) {
 518                 pr_debug("%s:%d: get_free_pages failed\n", __func__, __LINE__);
 519                 goto clean_none;
 520         }
 521
 522         result = ps3_dma_map(dev->d_region, virt_addr, size, dma_handle,
 523                              IOPTE_PP_W | IOPTE_PP_R | IOPTE_SO_RW | IOPTE_M);
 524
 525         if (result) {
 526                 pr_debug("%s:%d: ps3_dma_map failed (%d)\n",
 527                         __func__, __LINE__, result);
 528                 BUG_ON("check region type");
 529                 goto clean_alloc;
 530         }
 531
 532         return (void*)virt_addr;
 533
 534 clean_alloc:
 535         free_pages(virt_addr, get_order(size));
 536 clean_none:
 537         dma_handle = NULL;
 538         return NULL;
 539 }
 540
 541 static void ps3_free_coherent(struct device *_dev, size_t size, void *vaddr,
 542         dma_addr_t dma_handle)
 543 {
 544         struct ps3_system_bus_device *dev = ps3_dev_to_system_bus_dev(_dev);
 545
 546         ps3_dma_unmap(dev->d_region, dma_handle, size);
 547         free_pages((unsigned long)vaddr, get_order(size));
 548 }
 549
 550 /* Creates TCEs for a user provided buffer.  The user buffer must be
 551  * contiguous real kernel storage (not vmalloc).  The address of the buffer
 552  * passed here is the kernel (virtual) address of the buffer.  The buffer
 553  * need not be page aligned, the dma_addr_t returned will point to the same
 554  * byte within the page as vaddr.
 555  */
 556
 557 static dma_addr_t ps3_sb_map_single(struct device *_dev, void *ptr, size_t size,
 558         enum dma_data_direction direction)
 559 {
 560         struct ps3_system_bus_device *dev = ps3_dev_to_system_bus_dev(_dev);
 561         int result;
 562         unsigned long bus_addr;
 563
 564         result = ps3_dma_map(dev->d_region, (unsigned long)ptr, size,
 565                              &bus_addr,
 566                              IOPTE_PP_R | IOPTE_PP_W | IOPTE_SO_RW | IOPTE_M);
 567
 568         if (result) {
 569                 pr_debug("%s:%d: ps3_dma_map failed (%d)\n",
 570                         __func__, __LINE__, result);
 571         }
 572
 573         return bus_addr;
 574 }
 575
 576 static dma_addr_t ps3_ioc0_map_single(struct device *_dev, void *ptr,
 577                                       size_t size,
 578                                       enum dma_data_direction direction)
 579 {
 580         struct ps3_system_bus_device *dev = ps3_dev_to_system_bus_dev(_dev);
 581         int result;
 582         unsigned long bus_addr;
 583         u64 iopte_flag;
 584
 585         iopte_flag = IOPTE_M;
 586         switch (direction) {
 587         case DMA_BIDIRECTIONAL:
 588                 iopte_flag |= IOPTE_PP_R | IOPTE_PP_W | IOPTE_SO_RW;
 589                 break;
 590         case DMA_TO_DEVICE:
 591                 iopte_flag |= IOPTE_PP_R | IOPTE_SO_R;
 592                 break;
 593         case DMA_FROM_DEVICE:
 594                 iopte_flag |= IOPTE_PP_W | IOPTE_SO_RW;
 595                 break;
 596         default:
 597                 /* not happned */
 598                 BUG();
 599         };
 600         result = ps3_dma_map(dev->d_region, (unsigned long)ptr, size,
 601                              &bus_addr, iopte_flag);
 602
 603         if (result) {
 604                 pr_debug("%s:%d: ps3_dma_map failed (%d)\n",
 605                         __func__, __LINE__, result);
 606         }
 607         return bus_addr;
 608 }
 609
 610 static void ps3_unmap_single(struct device *_dev, dma_addr_t dma_addr,
 611         size_t size, enum dma_data_direction direction)
 612 {
 613         struct ps3_system_bus_device *dev = ps3_dev_to_system_bus_dev(_dev);
 614         int result;
 615
 616         result = ps3_dma_unmap(dev->d_region, dma_addr, size);
 617
 618         if (result) {
 619                 pr_debug("%s:%d: ps3_dma_unmap failed (%d)\n",
 620                         __func__, __LINE__, result);
 621         }
 622 }
 623
 624 static int ps3_sb_map_sg(struct device *_dev, struct scatterlist *sgl,
 625         int nents, enum dma_data_direction direction)
 626 {
 627 #if defined(CONFIG_PS3_DYNAMIC_DMA)
 628         BUG_ON("do");
 629         return -EPERM;
 630 #else
 631         struct ps3_system_bus_device *dev = ps3_dev_to_system_bus_dev(_dev);
 632         struct scatterlist *sg;
 633         int i;
 634
 635         for_each_sg(sgl, sg, nents, i) {
 636                 int result = ps3_dma_map(dev->d_region, sg_phys(sg),
 637                                         sg->length, &sg->dma_address, 0);
 638
 639                 if (result) {
 640                         pr_debug("%s:%d: ps3_dma_map failed (%d)\n",
 641                                 __func__, __LINE__, result);
 642                         return -EINVAL;
 643                 }
 644
 645                 sg->dma_length = sg->length;
 646         }
 647
 648         return nents;
 649 #endif
 650 }
 651
 652 static int ps3_ioc0_map_sg(struct device *_dev, struct scatterlist *sg,
 653                            int nents,
 654                            enum dma_data_direction direction)
 655 {
 656         BUG();
 657         return 0;
 658 }
 659
 660 static void ps3_sb_unmap_sg(struct device *_dev, struct scatterlist *sg,
 661         int nents, enum dma_data_direction direction)
 662 {
 663 #if defined(CONFIG_PS3_DYNAMIC_DMA)
 664         BUG_ON("do");
 665 #endif
 666 }
 667
 668 static void ps3_ioc0_unmap_sg(struct device *_dev, struct scatterlist *sg,
 669                             int nents, enum dma_data_direction direction)
 670 {
 671         BUG();
 672 }
 673
 674 static int ps3_dma_supported(struct device *_dev, u64 mask)
 675 {
 676         return mask >= DMA_32BIT_MASK;
 677 }
 678
 679 static struct dma_mapping_ops ps3_sb_dma_ops = {
 680         .alloc_coherent = ps3_alloc_coherent,
 681         .free_coherent = ps3_free_coherent,
 682         .map_single = ps3_sb_map_single,
 683         .unmap_single = ps3_unmap_single,
 684         .map_sg = ps3_sb_map_sg,
 685         .unmap_sg = ps3_sb_unmap_sg,
 686         .dma_supported = ps3_dma_supported
 687 };
 688
 689 static struct dma_mapping_ops ps3_ioc0_dma_ops = {
 690         .alloc_coherent = ps3_alloc_coherent,
 691         .free_coherent = ps3_free_coherent,
 692         .map_single = ps3_ioc0_map_single,
 693         .unmap_single = ps3_unmap_single,
 694         .map_sg = ps3_ioc0_map_sg,
 695         .unmap_sg = ps3_ioc0_unmap_sg,
 696         .dma_supported = ps3_dma_supported
 697 };
 698
 699 /**
 700  * ps3_system_bus_release_device - remove a device from the system bus
 701  */
 702
 703 static void ps3_system_bus_release_device(struct device *_dev)
 704 {
 705         struct ps3_system_bus_device *dev = ps3_dev_to_system_bus_dev(_dev);
 706         kfree(dev);
 707 }
 708
 709 /**
 710  * ps3_system_bus_device_register - add a device to the system bus
 711  *
 712  * ps3_system_bus_device_register() expects the dev object to be allocated
 713  * dynamically by the caller.  The system bus takes ownership of the dev
 714  * object and frees the object in ps3_system_bus_release_device().
 715  */
 716
 717 int ps3_system_bus_device_register(struct ps3_system_bus_device *dev)
 718 {
 719         int result;
 720         static unsigned int dev_ioc0_count;
 721         static unsigned int dev_sb_count;
 722         static unsigned int dev_vuart_count;
 723         static unsigned int dev_lpm_count;
 724
 725         if (!dev->core.parent)
 726                 dev->core.parent = &ps3_system_bus;
 727         dev->core.bus = &ps3_system_bus_type;
 728         dev->core.release = ps3_system_bus_release_device;
 729
 730         switch (dev->dev_type) {
 731         case PS3_DEVICE_TYPE_IOC0:
 732                 dev->core.archdata.dma_ops = &ps3_ioc0_dma_ops;
 733                 snprintf(dev->core.bus_id, sizeof(dev->core.bus_id),
 734                         "ioc0_%02x", ++dev_ioc0_count);
 735                 break;
 736         case PS3_DEVICE_TYPE_SB:
 737                 dev->core.archdata.dma_ops = &ps3_sb_dma_ops;
 738                 snprintf(dev->core.bus_id, sizeof(dev->core.bus_id),
 739                         "sb_%02x", ++dev_sb_count);
 740
 741                 break;
 742         case PS3_DEVICE_TYPE_VUART:
 743                 snprintf(dev->core.bus_id, sizeof(dev->core.bus_id),
 744                         "vuart_%02x", ++dev_vuart_count);
 745                 break;
 746         case PS3_DEVICE_TYPE_LPM:
 747                 snprintf(dev->core.bus_id, sizeof(dev->core.bus_id),
 748                         "lpm_%02x", ++dev_lpm_count);
 749                 break;
 750         default:
 751                 BUG();
 752         };
 753
 754         dev->core.archdata.of_node = NULL;
 755         dev->core.archdata.numa_node = 0;
 756
 757         pr_debug("%s:%d add %s\n", __func__, __LINE__, dev->core.bus_id);
 758
 759         result = device_register(&dev->core);
 760         return result;
 761 }
 762
 763 EXPORT_SYMBOL_GPL(ps3_system_bus_device_register);
 764
 765 int ps3_system_bus_driver_register(struct ps3_system_bus_driver *drv)
 766 {
 767         int result;
 768
 769         pr_debug(" -> %s:%d: %s\n", __func__, __LINE__, drv->core.name);
 770
 771         if (!firmware_has_feature(FW_FEATURE_PS3_LV1))
 772                 return -ENODEV;
 773
 774         drv->core.bus = &ps3_system_bus_type;
 775
 776         result = driver_register(&drv->core);
 777         pr_debug(" <- %s:%d: %s\n", __func__, __LINE__, drv->core.name);
 778         return result;
 779 }
 780
 781 EXPORT_SYMBOL_GPL(ps3_system_bus_driver_register);
 782
 783 void ps3_system_bus_driver_unregister(struct ps3_system_bus_driver *drv)
 784 {
 785         pr_debug(" -> %s:%d: %s\n", __func__, __LINE__, drv->core.name);
 786         driver_unregister(&drv->core);
 787         pr_debug(" <- %s:%d: %s\n", __func__, __LINE__, drv->core.name);
 788 }
 789
 790 EXPORT_SYMBOL_GPL(ps3_system_bus_driver_unregister);