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 if (!dev->match_sub_id) 351 result = dev->match_id == drv->match_id; 352 else 353 result = dev->match_sub_id == drv->match_sub_id && 354 dev->match_id == drv->match_id; 355 356 if (result) 357 pr_info("%s:%d: dev=%u.%u(%s), drv=%u.%u(%s): match\n", 358 __func__, __LINE__, 359 dev->match_id, dev->match_sub_id, dev->core.bus_id, 360 drv->match_id, drv->match_sub_id, drv->core.name); 361 else 362 pr_debug("%s:%d: dev=%u.%u(%s), drv=%u.%u(%s): miss\n", 363 __func__, __LINE__, 364 dev->match_id, dev->match_sub_id, dev->core.bus_id, 365 drv->match_id, drv->match_sub_id, drv->core.name); 366 367 return result; 368 } 369 370 static int ps3_system_bus_probe(struct device *_dev) 371 { 372 int result = 0; 373 struct ps3_system_bus_device *dev = ps3_dev_to_system_bus_dev(_dev); 374 struct ps3_system_bus_driver *drv; 375 376 BUG_ON(!dev); 377 pr_debug(" -> %s:%d: %s\n", __func__, __LINE__, _dev->bus_id); 378 379 drv = ps3_system_bus_dev_to_system_bus_drv(dev); 380 BUG_ON(!drv); 381 382 if (drv->probe) 383 result = drv->probe(dev); 384 else 385 pr_debug("%s:%d: %s no probe method\n", __func__, __LINE__, 386 dev->core.bus_id); 387 388 pr_debug(" <- %s:%d: %s\n", __func__, __LINE__, dev->core.bus_id); 389 return result; 390 } 391 392 static int ps3_system_bus_remove(struct device *_dev) 393 { 394 int result = 0; 395 struct ps3_system_bus_device *dev = ps3_dev_to_system_bus_dev(_dev); 396 struct ps3_system_bus_driver *drv; 397 398 BUG_ON(!dev); 399 pr_debug(" -> %s:%d: %s\n", __func__, __LINE__, _dev->bus_id); 400 401 drv = ps3_system_bus_dev_to_system_bus_drv(dev); 402 BUG_ON(!drv); 403 404 if (drv->remove) 405 result = drv->remove(dev); 406 else 407 dev_dbg(&dev->core, "%s:%d %s: no remove method\n", 408 __func__, __LINE__, drv->core.name); 409 410 pr_debug(" <- %s:%d: %s\n", __func__, __LINE__, dev->core.bus_id); 411 return result; 412 } 413 414 static void ps3_system_bus_shutdown(struct device *_dev) 415 { 416 struct ps3_system_bus_device *dev = ps3_dev_to_system_bus_dev(_dev); 417 struct ps3_system_bus_driver *drv; 418 419 BUG_ON(!dev); 420 421 dev_dbg(&dev->core, " -> %s:%d: match_id %d\n", __func__, __LINE__, 422 dev->match_id); 423 424 if (!dev->core.driver) { 425 dev_dbg(&dev->core, "%s:%d: no driver bound\n", __func__, 426 __LINE__); 427 return; 428 } 429 430 drv = ps3_system_bus_dev_to_system_bus_drv(dev); 431 432 BUG_ON(!drv); 433 434 dev_dbg(&dev->core, "%s:%d: %s -> %s\n", __func__, __LINE__, 435 dev->core.bus_id, drv->core.name); 436 437 if (drv->shutdown) 438 drv->shutdown(dev); 439 else if (drv->remove) { 440 dev_dbg(&dev->core, "%s:%d %s: no shutdown, calling remove\n", 441 __func__, __LINE__, drv->core.name); 442 drv->remove(dev); 443 } else { 444 dev_dbg(&dev->core, "%s:%d %s: no shutdown method\n", 445 __func__, __LINE__, drv->core.name); 446 BUG(); 447 } 448 449 dev_dbg(&dev->core, " <- %s:%d\n", __func__, __LINE__); 450 } 451 452 static int ps3_system_bus_uevent(struct device *_dev, struct kobj_uevent_env *env) 453 { 454 struct ps3_system_bus_device *dev = ps3_dev_to_system_bus_dev(_dev); 455 456 if (add_uevent_var(env, "MODALIAS=ps3:%d", dev->match_id)) 457 return -ENOMEM; 458 return 0; 459 } 460 461 static ssize_t modalias_show(struct device *_dev, struct device_attribute *a, 462 char *buf) 463 { 464 struct ps3_system_bus_device *dev = ps3_dev_to_system_bus_dev(_dev); 465 int len = snprintf(buf, PAGE_SIZE, "ps3:%d\n", dev->match_id); 466 467 return (len >= PAGE_SIZE) ? (PAGE_SIZE - 1) : len; 468 } 469 470 static struct device_attribute ps3_system_bus_dev_attrs[] = { 471 __ATTR_RO(modalias), 472 __ATTR_NULL, 473 }; 474 475 struct bus_type ps3_system_bus_type = { 476 .name = "ps3_system_bus", 477 .match = ps3_system_bus_match, 478 .uevent = ps3_system_bus_uevent, 479 .probe = ps3_system_bus_probe, 480 .remove = ps3_system_bus_remove, 481 .shutdown = ps3_system_bus_shutdown, 482 .dev_attrs = ps3_system_bus_dev_attrs, 483 }; 484 485 static int __init ps3_system_bus_init(void) 486 { 487 int result; 488 489 if (!firmware_has_feature(FW_FEATURE_PS3_LV1)) 490 return -ENODEV; 491 492 pr_debug(" -> %s:%d\n", __func__, __LINE__); 493 494 mutex_init(&usage_hack.mutex); 495 496 result = device_register(&ps3_system_bus); 497 BUG_ON(result); 498 499 result = bus_register(&ps3_system_bus_type); 500 BUG_ON(result); 501 502 pr_debug(" <- %s:%d\n", __func__, __LINE__); 503 return result; 504 } 505 506 core_initcall(ps3_system_bus_init); 507 508 /* Allocates a contiguous real buffer and creates mappings over it. 509 * Returns the virtual address of the buffer and sets dma_handle 510 * to the dma address (mapping) of the first page. 511 */ 512 static void * ps3_alloc_coherent(struct device *_dev, size_t size, 513 dma_addr_t *dma_handle, gfp_t flag) 514 { 515 int result; 516 struct ps3_system_bus_device *dev = ps3_dev_to_system_bus_dev(_dev); 517 unsigned long virt_addr; 518 519 flag &= ~(__GFP_DMA | __GFP_HIGHMEM); 520 flag |= __GFP_ZERO; 521 522 virt_addr = __get_free_pages(flag, get_order(size)); 523 524 if (!virt_addr) { 525 pr_debug("%s:%d: get_free_pages failed\n", __func__, __LINE__); 526 goto clean_none; 527 } 528 529 result = ps3_dma_map(dev->d_region, virt_addr, size, dma_handle, 530 IOPTE_PP_W | IOPTE_PP_R | IOPTE_SO_RW | IOPTE_M); 531 532 if (result) { 533 pr_debug("%s:%d: ps3_dma_map failed (%d)\n", 534 __func__, __LINE__, result); 535 BUG_ON("check region type"); 536 goto clean_alloc; 537 } 538 539 return (void*)virt_addr; 540 541 clean_alloc: 542 free_pages(virt_addr, get_order(size)); 543 clean_none: 544 dma_handle = NULL; 545 return NULL; 546 } 547 548 static void ps3_free_coherent(struct device *_dev, size_t size, void *vaddr, 549 dma_addr_t dma_handle) 550 { 551 struct ps3_system_bus_device *dev = ps3_dev_to_system_bus_dev(_dev); 552 553 ps3_dma_unmap(dev->d_region, dma_handle, size); 554 free_pages((unsigned long)vaddr, get_order(size)); 555 } 556 557 /* Creates TCEs for a user provided buffer. The user buffer must be 558 * contiguous real kernel storage (not vmalloc). The address passed here 559 * comprises a page address and offset into that page. The dma_addr_t 560 * returned will point to the same byte within the page as was passed in. 561 */ 562 563 static dma_addr_t ps3_sb_map_page(struct device *_dev, struct page *page, 564 unsigned long offset, size_t size, enum dma_data_direction direction, 565 struct dma_attrs *attrs) 566 { 567 struct ps3_system_bus_device *dev = ps3_dev_to_system_bus_dev(_dev); 568 int result; 569 unsigned long bus_addr; 570 void *ptr = page_address(page) + offset; 571 572 result = ps3_dma_map(dev->d_region, (unsigned long)ptr, size, 573 &bus_addr, 574 IOPTE_PP_R | IOPTE_PP_W | IOPTE_SO_RW | IOPTE_M); 575 576 if (result) { 577 pr_debug("%s:%d: ps3_dma_map failed (%d)\n", 578 __func__, __LINE__, result); 579 } 580 581 return bus_addr; 582 } 583 584 static dma_addr_t ps3_ioc0_map_page(struct device *_dev, struct page *page, 585 unsigned long offset, size_t size, 586 enum dma_data_direction direction, 587 struct dma_attrs *attrs) 588 { 589 struct ps3_system_bus_device *dev = ps3_dev_to_system_bus_dev(_dev); 590 int result; 591 unsigned long bus_addr; 592 u64 iopte_flag; 593 void *ptr = page_address(page) + offset; 594 595 iopte_flag = IOPTE_M; 596 switch (direction) { 597 case DMA_BIDIRECTIONAL: 598 iopte_flag |= IOPTE_PP_R | IOPTE_PP_W | IOPTE_SO_RW; 599 break; 600 case DMA_TO_DEVICE: 601 iopte_flag |= IOPTE_PP_R | IOPTE_SO_R; 602 break; 603 case DMA_FROM_DEVICE: 604 iopte_flag |= IOPTE_PP_W | IOPTE_SO_RW; 605 break; 606 default: 607 /* not happned */ 608 BUG(); 609 }; 610 result = ps3_dma_map(dev->d_region, (unsigned long)ptr, size, 611 &bus_addr, iopte_flag); 612 613 if (result) { 614 pr_debug("%s:%d: ps3_dma_map failed (%d)\n", 615 __func__, __LINE__, result); 616 } 617 return bus_addr; 618 } 619 620 static void ps3_unmap_page(struct device *_dev, dma_addr_t dma_addr, 621 size_t size, enum dma_data_direction direction, struct dma_attrs *attrs) 622 { 623 struct ps3_system_bus_device *dev = ps3_dev_to_system_bus_dev(_dev); 624 int result; 625 626 result = ps3_dma_unmap(dev->d_region, dma_addr, size); 627 628 if (result) { 629 pr_debug("%s:%d: ps3_dma_unmap failed (%d)\n", 630 __func__, __LINE__, result); 631 } 632 } 633 634 static int ps3_sb_map_sg(struct device *_dev, struct scatterlist *sgl, 635 int nents, enum dma_data_direction direction, struct dma_attrs *attrs) 636 { 637 #if defined(CONFIG_PS3_DYNAMIC_DMA) 638 BUG_ON("do"); 639 return -EPERM; 640 #else 641 struct ps3_system_bus_device *dev = ps3_dev_to_system_bus_dev(_dev); 642 struct scatterlist *sg; 643 int i; 644 645 for_each_sg(sgl, sg, nents, i) { 646 int result = ps3_dma_map(dev->d_region, sg_phys(sg), 647 sg->length, &sg->dma_address, 0); 648 649 if (result) { 650 pr_debug("%s:%d: ps3_dma_map failed (%d)\n", 651 __func__, __LINE__, result); 652 return -EINVAL; 653 } 654 655 sg->dma_length = sg->length; 656 } 657 658 return nents; 659 #endif 660 } 661 662 static int ps3_ioc0_map_sg(struct device *_dev, struct scatterlist *sg, 663 int nents, 664 enum dma_data_direction direction, 665 struct dma_attrs *attrs) 666 { 667 BUG(); 668 return 0; 669 } 670 671 static void ps3_sb_unmap_sg(struct device *_dev, struct scatterlist *sg, 672 int nents, enum dma_data_direction direction, struct dma_attrs *attrs) 673 { 674 #if defined(CONFIG_PS3_DYNAMIC_DMA) 675 BUG_ON("do"); 676 #endif 677 } 678 679 static void ps3_ioc0_unmap_sg(struct device *_dev, struct scatterlist *sg, 680 int nents, enum dma_data_direction direction, 681 struct dma_attrs *attrs) 682 { 683 BUG(); 684 } 685 686 static int ps3_dma_supported(struct device *_dev, u64 mask) 687 { 688 return mask >= DMA_32BIT_MASK; 689 } 690 691 static struct dma_mapping_ops ps3_sb_dma_ops = { 692 .alloc_coherent = ps3_alloc_coherent, 693 .free_coherent = ps3_free_coherent, 694 .map_sg = ps3_sb_map_sg, 695 .unmap_sg = ps3_sb_unmap_sg, 696 .dma_supported = ps3_dma_supported, 697 .map_page = ps3_sb_map_page, 698 .unmap_page = ps3_unmap_page, 699 }; 700 701 static struct dma_mapping_ops ps3_ioc0_dma_ops = { 702 .alloc_coherent = ps3_alloc_coherent, 703 .free_coherent = ps3_free_coherent, 704 .map_sg = ps3_ioc0_map_sg, 705 .unmap_sg = ps3_ioc0_unmap_sg, 706 .dma_supported = ps3_dma_supported, 707 .map_page = ps3_ioc0_map_page, 708 .unmap_page = ps3_unmap_page, 709 }; 710 711 /** 712 * ps3_system_bus_release_device - remove a device from the system bus 713 */ 714 715 static void ps3_system_bus_release_device(struct device *_dev) 716 { 717 struct ps3_system_bus_device *dev = ps3_dev_to_system_bus_dev(_dev); 718 kfree(dev); 719 } 720 721 /** 722 * ps3_system_bus_device_register - add a device to the system bus 723 * 724 * ps3_system_bus_device_register() expects the dev object to be allocated 725 * dynamically by the caller. The system bus takes ownership of the dev 726 * object and frees the object in ps3_system_bus_release_device(). 727 */ 728 729 int ps3_system_bus_device_register(struct ps3_system_bus_device *dev) 730 { 731 int result; 732 static unsigned int dev_ioc0_count; 733 static unsigned int dev_sb_count; 734 static unsigned int dev_vuart_count; 735 static unsigned int dev_lpm_count; 736 737 if (!dev->core.parent) 738 dev->core.parent = &ps3_system_bus; 739 dev->core.bus = &ps3_system_bus_type; 740 dev->core.release = ps3_system_bus_release_device; 741 742 switch (dev->dev_type) { 743 case PS3_DEVICE_TYPE_IOC0: 744 dev->core.archdata.dma_ops = &ps3_ioc0_dma_ops; 745 snprintf(dev->core.bus_id, sizeof(dev->core.bus_id), 746 "ioc0_%02x", ++dev_ioc0_count); 747 break; 748 case PS3_DEVICE_TYPE_SB: 749 dev->core.archdata.dma_ops = &ps3_sb_dma_ops; 750 snprintf(dev->core.bus_id, sizeof(dev->core.bus_id), 751 "sb_%02x", ++dev_sb_count); 752 753 break; 754 case PS3_DEVICE_TYPE_VUART: 755 snprintf(dev->core.bus_id, sizeof(dev->core.bus_id), 756 "vuart_%02x", ++dev_vuart_count); 757 break; 758 case PS3_DEVICE_TYPE_LPM: 759 snprintf(dev->core.bus_id, sizeof(dev->core.bus_id), 760 "lpm_%02x", ++dev_lpm_count); 761 break; 762 default: 763 BUG(); 764 }; 765 766 dev->core.archdata.of_node = NULL; 767 set_dev_node(&dev->core, 0); 768 769 pr_debug("%s:%d add %s\n", __func__, __LINE__, dev->core.bus_id); 770 771 result = device_register(&dev->core); 772 return result; 773 } 774 775 EXPORT_SYMBOL_GPL(ps3_system_bus_device_register); 776 777 int ps3_system_bus_driver_register(struct ps3_system_bus_driver *drv) 778 { 779 int result; 780 781 pr_debug(" -> %s:%d: %s\n", __func__, __LINE__, drv->core.name); 782 783 if (!firmware_has_feature(FW_FEATURE_PS3_LV1)) 784 return -ENODEV; 785 786 drv->core.bus = &ps3_system_bus_type; 787 788 result = driver_register(&drv->core); 789 pr_debug(" <- %s:%d: %s\n", __func__, __LINE__, drv->core.name); 790 return result; 791 } 792 793 EXPORT_SYMBOL_GPL(ps3_system_bus_driver_register); 794 795 void ps3_system_bus_driver_unregister(struct ps3_system_bus_driver *drv) 796 { 797 pr_debug(" -> %s:%d: %s\n", __func__, __LINE__, drv->core.name); 798 driver_unregister(&drv->core); 799 pr_debug(" <- %s:%d: %s\n", __func__, __LINE__, drv->core.name); 800 } 801 802 EXPORT_SYMBOL_GPL(ps3_system_bus_driver_unregister); 803