arch/powerpc/platforms/ps3/device-init.c

   1 /*
   2  *  PS3 device registration routines.
   3  *
   4  *  Copyright (C) 2007 Sony Computer Entertainment Inc.
   5  *  Copyright 2007 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/delay.h>
  22 #include <linux/freezer.h>
  23 #include <linux/kernel.h>
  24 #include <linux/kthread.h>
  25 #include <linux/init.h>
  26
  27 #include <asm/firmware.h>
  28 #include <asm/lv1call.h>
  29 #include <asm/ps3stor.h>
  30
  31 #include "platform.h"
  32
  33 /**
  34  * ps3_setup_gelic_device - Setup and register a gelic device instance.
  35  *
  36  * Allocates memory for a struct ps3_system_bus_device instance, initialises the
  37  * structure members, and registers the device instance with the system bus.
  38  */
  39
  40 static int __init ps3_setup_gelic_device(
  41         const struct ps3_repository_device *repo)
  42 {
  43         int result;
  44         struct layout {
  45                 struct ps3_system_bus_device dev;
  46                 struct ps3_dma_region d_region;
  47         } *p;
  48
  49         pr_debug(" -> %s:%d\n", __func__, __LINE__);
  50
  51         BUG_ON(repo->bus_type != PS3_BUS_TYPE_SB);
  52         BUG_ON(repo->dev_type != PS3_DEV_TYPE_SB_GELIC);
  53
  54         p = kzalloc(sizeof(struct layout), GFP_KERNEL);
  55
  56         if (!p) {
  57                 result = -ENOMEM;
  58                 goto fail_malloc;
  59         }
  60
  61         p->dev.match_id = PS3_MATCH_ID_GELIC;
  62         p->dev.dev_type = PS3_DEVICE_TYPE_SB;
  63         p->dev.bus_id = repo->bus_id;
  64         p->dev.dev_id = repo->dev_id;
  65         p->dev.d_region = &p->d_region;
  66
  67         result = ps3_repository_find_interrupt(repo,
  68                 PS3_INTERRUPT_TYPE_EVENT_PORT, &p->dev.interrupt_id);
  69
  70         if (result) {
  71                 pr_debug("%s:%d ps3_repository_find_interrupt failed\n",
  72                         __func__, __LINE__);
  73                 goto fail_find_interrupt;
  74         }
  75
  76         BUG_ON(p->dev.interrupt_id != 0);
  77
  78         result = ps3_dma_region_init(&p->dev, p->dev.d_region, PS3_DMA_64K,
  79                 PS3_DMA_OTHER, NULL, 0);
  80
  81         if (result) {
  82                 pr_debug("%s:%d ps3_dma_region_init failed\n",
  83                         __func__, __LINE__);
  84                 goto fail_dma_init;
  85         }
  86
  87         result = ps3_system_bus_device_register(&p->dev);
  88
  89         if (result) {
  90                 pr_debug("%s:%d ps3_system_bus_device_register failed\n",
  91                         __func__, __LINE__);
  92                 goto fail_device_register;
  93         }
  94
  95         pr_debug(" <- %s:%d\n", __func__, __LINE__);
  96         return result;
  97
  98 fail_device_register:
  99 fail_dma_init:
 100 fail_find_interrupt:
 101         kfree(p);
 102 fail_malloc:
 103         pr_debug(" <- %s:%d: fail.\n", __func__, __LINE__);
 104         return result;
 105 }
 106
 107 static int __init_refok ps3_setup_uhc_device(
 108         const struct ps3_repository_device *repo, enum ps3_match_id match_id,
 109         enum ps3_interrupt_type interrupt_type, enum ps3_reg_type reg_type)
 110 {
 111         int result;
 112         struct layout {
 113                 struct ps3_system_bus_device dev;
 114                 struct ps3_dma_region d_region;
 115                 struct ps3_mmio_region m_region;
 116         } *p;
 117         u64 bus_addr;
 118         u64 len;
 119
 120         pr_debug(" -> %s:%d\n", __func__, __LINE__);
 121
 122         BUG_ON(repo->bus_type != PS3_BUS_TYPE_SB);
 123         BUG_ON(repo->dev_type != PS3_DEV_TYPE_SB_USB);
 124
 125         p = kzalloc(sizeof(struct layout), GFP_KERNEL);
 126
 127         if (!p) {
 128                 result = -ENOMEM;
 129                 goto fail_malloc;
 130         }
 131
 132         p->dev.match_id = match_id;
 133         p->dev.dev_type = PS3_DEVICE_TYPE_SB;
 134         p->dev.bus_id = repo->bus_id;
 135         p->dev.dev_id = repo->dev_id;
 136         p->dev.d_region = &p->d_region;
 137         p->dev.m_region = &p->m_region;
 138
 139         result = ps3_repository_find_interrupt(repo,
 140                 interrupt_type, &p->dev.interrupt_id);
 141
 142         if (result) {
 143                 pr_debug("%s:%d ps3_repository_find_interrupt failed\n",
 144                         __func__, __LINE__);
 145                 goto fail_find_interrupt;
 146         }
 147
 148         result = ps3_repository_find_reg(repo, reg_type,
 149                 &bus_addr, &len);
 150
 151         if (result) {
 152                 pr_debug("%s:%d ps3_repository_find_reg failed\n",
 153                         __func__, __LINE__);
 154                 goto fail_find_reg;
 155         }
 156
 157         result = ps3_dma_region_init(&p->dev, p->dev.d_region, PS3_DMA_64K,
 158                 PS3_DMA_INTERNAL, NULL, 0);
 159
 160         if (result) {
 161                 pr_debug("%s:%d ps3_dma_region_init failed\n",
 162                         __func__, __LINE__);
 163                 goto fail_dma_init;
 164         }
 165
 166         result = ps3_mmio_region_init(&p->dev, p->dev.m_region, bus_addr, len,
 167                 PS3_MMIO_4K);
 168
 169         if (result) {
 170                 pr_debug("%s:%d ps3_mmio_region_init failed\n",
 171                         __func__, __LINE__);
 172                 goto fail_mmio_init;
 173         }
 174
 175         result = ps3_system_bus_device_register(&p->dev);
 176
 177         if (result) {
 178                 pr_debug("%s:%d ps3_system_bus_device_register failed\n",
 179                         __func__, __LINE__);
 180                 goto fail_device_register;
 181         }
 182
 183         pr_debug(" <- %s:%d\n", __func__, __LINE__);
 184         return result;
 185
 186 fail_device_register:
 187 fail_mmio_init:
 188 fail_dma_init:
 189 fail_find_reg:
 190 fail_find_interrupt:
 191         kfree(p);
 192 fail_malloc:
 193         pr_debug(" <- %s:%d: fail.\n", __func__, __LINE__);
 194         return result;
 195 }
 196
 197 static int __init ps3_setup_ehci_device(
 198         const struct ps3_repository_device *repo)
 199 {
 200         return ps3_setup_uhc_device(repo, PS3_MATCH_ID_EHCI,
 201                 PS3_INTERRUPT_TYPE_SB_EHCI, PS3_REG_TYPE_SB_EHCI);
 202 }
 203
 204 static int __init ps3_setup_ohci_device(
 205         const struct ps3_repository_device *repo)
 206 {
 207         return ps3_setup_uhc_device(repo, PS3_MATCH_ID_OHCI,
 208                 PS3_INTERRUPT_TYPE_SB_OHCI, PS3_REG_TYPE_SB_OHCI);
 209 }
 210
 211 static int __init ps3_setup_vuart_device(enum ps3_match_id match_id,
 212         unsigned int port_number)
 213 {
 214         int result;
 215         struct layout {
 216                 struct ps3_system_bus_device dev;
 217         } *p;
 218
 219         pr_debug(" -> %s:%d: match_id %u, port %u\n", __func__, __LINE__,
 220                 match_id, port_number);
 221
 222         p = kzalloc(sizeof(struct layout), GFP_KERNEL);
 223
 224         if (!p)
 225                 return -ENOMEM;
 226
 227         p->dev.match_id = match_id;
 228         p->dev.dev_type = PS3_DEVICE_TYPE_VUART;
 229         p->dev.port_number = port_number;
 230
 231         result = ps3_system_bus_device_register(&p->dev);
 232
 233         if (result)
 234                 pr_debug("%s:%d ps3_system_bus_device_register failed\n",
 235                         __func__, __LINE__);
 236
 237         pr_debug(" <- %s:%d\n", __func__, __LINE__);
 238         return result;
 239 }
 240
 241 static int ps3stor_wait_for_completion(u64 dev_id, u64 tag,
 242                                        unsigned int timeout)
 243 {
 244         int result = -1;
 245         unsigned int retries = 0;
 246         u64 status;
 247
 248         for (retries = 0; retries < timeout; retries++) {
 249                 result = lv1_storage_check_async_status(dev_id, tag, &status);
 250                 if (!result)
 251                         break;
 252
 253                 msleep(1);
 254         }
 255
 256         if (result)
 257                 pr_debug("%s:%u: check_async_status: %s, status %lx\n",
 258                          __func__, __LINE__, ps3_result(result), status);
 259
 260         return result;
 261 }
 262
 263 /**
 264  * ps3_storage_wait_for_device - Wait for a storage device to become ready.
 265  * @repo: The repository device to wait for.
 266  *
 267  * Uses the hypervisor's storage device notification mechanism to wait until
 268  * a storage device is ready.  The device notification mechanism uses a
 269  * psuedo device (id = -1) to asynchronously notify the guest when storage
 270  * devices become ready.  The notification device has a block size of 512
 271  * bytes.
 272  */
 273
 274 static int ps3_storage_wait_for_device(const struct ps3_repository_device *repo)
 275 {
 276         int result;
 277         const u64 notification_dev_id = (u64)-1LL;
 278         const unsigned int timeout = HZ;
 279         u64 lpar;
 280         u64 tag;
 281         struct {
 282                 u64 operation_code;     /* must be zero */
 283                 u64 event_mask;         /* 1 = device ready */
 284         } *notify_cmd;
 285         struct {
 286                 u64 event_type;         /* notify_device_ready */
 287                 u64 bus_id;
 288                 u64 dev_id;
 289                 u64 dev_type;
 290                 u64 dev_port;
 291         } *notify_event;
 292         enum {
 293                 notify_device_ready = 1
 294         };
 295
 296         pr_debug(" -> %s:%u: bus_id %u, dev_id %u, dev_type %u\n", __func__,
 297                  __LINE__, repo->bus_id, repo->dev_id, repo->dev_type);
 298
 299         notify_cmd = kzalloc(512, GFP_KERNEL);
 300         notify_event = (void *)notify_cmd;
 301         if (!notify_cmd)
 302                 return -ENOMEM;
 303
 304         lpar = ps3_mm_phys_to_lpar(__pa(notify_cmd));
 305
 306         result = lv1_open_device(repo->bus_id, notification_dev_id, 0);
 307         if (result) {
 308                 printk(KERN_ERR "%s:%u: lv1_open_device %s\n", __func__,
 309                        __LINE__, ps3_result(result));
 310                 result = -ENODEV;
 311                 goto fail_free;
 312         }
 313
 314         /* Setup and write the request for device notification. */
 315
 316         notify_cmd->operation_code = 0; /* must be zero */
 317         notify_cmd->event_mask = 0x01;  /* device ready */
 318
 319         result = lv1_storage_write(notification_dev_id, 0, 0, 1, 0, lpar,
 320                                    &tag);
 321         if (result) {
 322                 printk(KERN_ERR "%s:%u: write failed %s\n", __func__, __LINE__,
 323                        ps3_result(result));
 324                 result = -ENODEV;
 325                 goto fail_close;
 326         }
 327
 328         /* Wait for the write completion */
 329
 330         result = ps3stor_wait_for_completion(notification_dev_id, tag,
 331                                              timeout);
 332         if (result) {
 333                 printk(KERN_ERR "%s:%u: write not completed %s\n", __func__,
 334                        __LINE__, ps3_result(result));
 335                 result = -ENODEV;
 336                 goto fail_close;
 337         }
 338
 339         /* Loop here processing the requested notification events. */
 340
 341         result = -ENODEV;
 342         while (1) {
 343                 memset(notify_event, 0, sizeof(*notify_event));
 344
 345                 result = lv1_storage_read(notification_dev_id, 0, 0, 1, 0,
 346                                           lpar, &tag);
 347                 if (result) {
 348                         printk(KERN_ERR "%s:%u: write failed %s\n", __func__,
 349                                __LINE__, ps3_result(result));
 350                         break;
 351                 }
 352
 353                 result = ps3stor_wait_for_completion(notification_dev_id, tag,
 354                                                      timeout);
 355                 if (result) {
 356                         printk(KERN_ERR "%s:%u: read not completed %s\n",
 357                                __func__, __LINE__, ps3_result(result));
 358                         break;
 359                 }
 360
 361                 if (notify_event->event_type != notify_device_ready ||
 362                     notify_event->bus_id != repo->bus_id) {
 363                         pr_debug("%s:%u: bad notify_event: event %lu, "
 364                                  "dev_id %lu, dev_type %lu\n",
 365                                  __func__, __LINE__, notify_event->event_type,
 366                                  notify_event->dev_id, notify_event->dev_type);
 367                         break;
 368                 }
 369
 370                 if (notify_event->dev_id == repo->dev_id &&
 371                     notify_event->dev_type == repo->dev_type) {
 372                         pr_debug("%s:%u: device ready: dev_id %u\n", __func__,
 373                                  __LINE__, repo->dev_id);
 374                         result = 0;
 375                         break;
 376                 }
 377
 378                 if (notify_event->dev_id == repo->dev_id &&
 379                     notify_event->dev_type == PS3_DEV_TYPE_NOACCESS) {
 380                         pr_debug("%s:%u: no access: dev_id %u\n", __func__,
 381                                  __LINE__, repo->dev_id);
 382                         break;
 383                 }
 384         }
 385
 386 fail_close:
 387         lv1_close_device(repo->bus_id, notification_dev_id);
 388 fail_free:
 389         kfree(notify_cmd);
 390         pr_debug(" <- %s:%u\n", __func__, __LINE__);
 391         return result;
 392 }
 393
 394 static int ps3_setup_storage_dev(const struct ps3_repository_device *repo,
 395                                  enum ps3_match_id match_id)
 396 {
 397         int result;
 398         struct ps3_storage_device *p;
 399         u64 port, blk_size, num_blocks;
 400         unsigned int num_regions, i;
 401
 402         pr_debug(" -> %s:%u: match_id %u\n", __func__, __LINE__, match_id);
 403
 404         result = ps3_repository_read_stor_dev_info(repo->bus_index,
 405                                                    repo->dev_index, &port,
 406                                                    &blk_size, &num_blocks,
 407                                                    &num_regions);
 408         if (result) {
 409                 printk(KERN_ERR "%s:%u: _read_stor_dev_info failed %d\n",
 410                        __func__, __LINE__, result);
 411                 return -ENODEV;
 412         }
 413
 414         pr_debug("%s:%u: index %u:%u: port %lu blk_size %lu num_blocks %lu "
 415                  "num_regions %u\n", __func__, __LINE__, repo->bus_index,
 416                  repo->dev_index, port, blk_size, num_blocks, num_regions);
 417
 418         p = kzalloc(sizeof(struct ps3_storage_device) +
 419                     num_regions * sizeof(struct ps3_storage_region),
 420                     GFP_KERNEL);
 421         if (!p) {
 422                 result = -ENOMEM;
 423                 goto fail_malloc;
 424         }
 425
 426         p->sbd.match_id = match_id;
 427         p->sbd.dev_type = PS3_DEVICE_TYPE_SB;
 428         p->sbd.bus_id = repo->bus_id;
 429         p->sbd.dev_id = repo->dev_id;
 430         p->sbd.d_region = &p->dma_region;
 431         p->blk_size = blk_size;
 432         p->num_regions = num_regions;
 433
 434         result = ps3_repository_find_interrupt(repo,
 435                                                PS3_INTERRUPT_TYPE_EVENT_PORT,
 436                                                &p->sbd.interrupt_id);
 437         if (result) {
 438                 printk(KERN_ERR "%s:%u: find_interrupt failed %d\n", __func__,
 439                        __LINE__, result);
 440                 result = -ENODEV;
 441                 goto fail_find_interrupt;
 442         }
 443
 444         /* FIXME: Arrange to only do this on a 'cold' boot */
 445
 446         result = ps3_storage_wait_for_device(repo);
 447         if (result) {
 448                 printk(KERN_ERR "%s:%u: storage_notification failed %d\n",
 449                        __func__, __LINE__, result);
 450                 result = -ENODEV;
 451                 goto fail_probe_notification;
 452         }
 453
 454         for (i = 0; i < num_regions; i++) {
 455                 unsigned int id;
 456                 u64 start, size;
 457
 458                 result = ps3_repository_read_stor_dev_region(repo->bus_index,
 459                                                              repo->dev_index,
 460                                                              i, &id, &start,
 461                                                              &size);
 462                 if (result) {
 463                         printk(KERN_ERR
 464                                "%s:%u: read_stor_dev_region failed %d\n",
 465                                __func__, __LINE__, result);
 466                         result = -ENODEV;
 467                         goto fail_read_region;
 468                 }
 469                 pr_debug("%s:%u: region %u: id %u start %lu size %lu\n",
 470                          __func__, __LINE__, i, id, start, size);
 471
 472                 p->regions[i].id = id;
 473                 p->regions[i].start = start;
 474                 p->regions[i].size = size;
 475         }
 476
 477         result = ps3_system_bus_device_register(&p->sbd);
 478         if (result) {
 479                 pr_debug("%s:%u ps3_system_bus_device_register failed\n",
 480                          __func__, __LINE__);
 481                 goto fail_device_register;
 482         }
 483
 484         pr_debug(" <- %s:%u\n", __func__, __LINE__);
 485         return 0;
 486
 487 fail_device_register:
 488 fail_read_region:
 489 fail_probe_notification:
 490 fail_find_interrupt:
 491         kfree(p);
 492 fail_malloc:
 493         pr_debug(" <- %s:%u: fail.\n", __func__, __LINE__);
 494         return result;
 495 }
 496
 497 static int __init ps3_register_vuart_devices(void)
 498 {
 499         int result;
 500         unsigned int port_number;
 501
 502         pr_debug(" -> %s:%d\n", __func__, __LINE__);
 503
 504         result = ps3_repository_read_vuart_av_port(&port_number);
 505         if (result)
 506                 port_number = 0; /* av default */
 507
 508         result = ps3_setup_vuart_device(PS3_MATCH_ID_AV_SETTINGS, port_number);
 509         WARN_ON(result);
 510
 511         result = ps3_repository_read_vuart_sysmgr_port(&port_number);
 512         if (result)
 513                 port_number = 2; /* sysmgr default */
 514
 515         result = ps3_setup_vuart_device(PS3_MATCH_ID_SYSTEM_MANAGER,
 516                 port_number);
 517         WARN_ON(result);
 518
 519         pr_debug(" <- %s:%d\n", __func__, __LINE__);
 520         return result;
 521 }
 522
 523 static int __init ps3_register_sound_devices(void)
 524 {
 525         int result;
 526         struct layout {
 527                 struct ps3_system_bus_device dev;
 528                 struct ps3_dma_region d_region;
 529                 struct ps3_mmio_region m_region;
 530         } *p;
 531
 532         pr_debug(" -> %s:%d\n", __func__, __LINE__);
 533
 534         p = kzalloc(sizeof(*p), GFP_KERNEL);
 535         if (!p)
 536                 return -ENOMEM;
 537
 538         p->dev.match_id = PS3_MATCH_ID_SOUND;
 539         p->dev.dev_type = PS3_DEVICE_TYPE_IOC0;
 540         p->dev.d_region = &p->d_region;
 541         p->dev.m_region = &p->m_region;
 542
 543         result = ps3_system_bus_device_register(&p->dev);
 544
 545         if (result)
 546                 pr_debug("%s:%d ps3_system_bus_device_register failed\n",
 547                         __func__, __LINE__);
 548
 549         pr_debug(" <- %s:%d\n", __func__, __LINE__);
 550         return result;
 551 }
 552
 553 static int __init ps3_register_graphics_devices(void)
 554 {
 555         int result;
 556         struct layout {
 557                 struct ps3_system_bus_device dev;
 558         } *p;
 559
 560         pr_debug(" -> %s:%d\n", __func__, __LINE__);
 561
 562         p = kzalloc(sizeof(struct layout), GFP_KERNEL);
 563
 564         if (!p)
 565                 return -ENOMEM;
 566
 567         p->dev.match_id = PS3_MATCH_ID_GRAPHICS;
 568         p->dev.dev_type = PS3_DEVICE_TYPE_IOC0;
 569
 570         result = ps3_system_bus_device_register(&p->dev);
 571
 572         if (result)
 573                 pr_debug("%s:%d ps3_system_bus_device_register failed\n",
 574                         __func__, __LINE__);
 575
 576         pr_debug(" <- %s:%d\n", __func__, __LINE__);
 577         return result;
 578 }
 579
 580 /**
 581  * ps3_register_repository_device - Register a device from the repositiory info.
 582  *
 583  */
 584
 585 static int ps3_register_repository_device(
 586         const struct ps3_repository_device *repo)
 587 {
 588         int result;
 589
 590         switch (repo->dev_type) {
 591         case PS3_DEV_TYPE_SB_GELIC:
 592                 result = ps3_setup_gelic_device(repo);
 593                 if (result) {
 594                         pr_debug("%s:%d ps3_setup_gelic_device failed\n",
 595                                 __func__, __LINE__);
 596                 }
 597                 break;
 598         case PS3_DEV_TYPE_SB_USB:
 599
 600                 /* Each USB device has both an EHCI and an OHCI HC */
 601
 602                 result = ps3_setup_ehci_device(repo);
 603
 604                 if (result) {
 605                         pr_debug("%s:%d ps3_setup_ehci_device failed\n",
 606                                 __func__, __LINE__);
 607                 }
 608
 609                 result = ps3_setup_ohci_device(repo);
 610
 611                 if (result) {
 612                         pr_debug("%s:%d ps3_setup_ohci_device failed\n",
 613                                 __func__, __LINE__);
 614                 }
 615                 break;
 616         case PS3_DEV_TYPE_STOR_DISK:
 617                 result = ps3_setup_storage_dev(repo, PS3_MATCH_ID_STOR_DISK);
 618
 619                 /* Some devices are not accessable from the Other OS lpar. */
 620                 if (result == -ENODEV) {
 621                         result = 0;
 622                         pr_debug("%s:%u: not accessable\n", __func__,
 623                                  __LINE__);
 624                 }
 625
 626                 if (result)
 627                         pr_debug("%s:%u ps3_setup_storage_dev failed\n",
 628                                  __func__, __LINE__);
 629                 break;
 630
 631         case PS3_DEV_TYPE_STOR_ROM:
 632                 result = ps3_setup_storage_dev(repo, PS3_MATCH_ID_STOR_ROM);
 633                 if (result)
 634                         pr_debug("%s:%u ps3_setup_storage_dev failed\n",
 635                                  __func__, __LINE__);
 636                 break;
 637
 638         case PS3_DEV_TYPE_STOR_FLASH:
 639                 result = ps3_setup_storage_dev(repo, PS3_MATCH_ID_STOR_FLASH);
 640                 if (result)
 641                         pr_debug("%s:%u ps3_setup_storage_dev failed\n",
 642                                  __func__, __LINE__);
 643                 break;
 644
 645         default:
 646                 result = 0;
 647                 pr_debug("%s:%u: unsupported dev_type %u\n", __func__, __LINE__,
 648                         repo->dev_type);
 649         }
 650
 651         return result;
 652 }
 653
 654 /**
 655  * ps3_probe_thread - Background repository probing at system startup.
 656  *
 657  * This implementation only supports background probing on a single bus.
 658  */
 659
 660 static int ps3_probe_thread(void *data)
 661 {
 662         struct ps3_repository_device *repo = data;
 663         int result;
 664         unsigned int ms = 250;
 665
 666         pr_debug(" -> %s:%u: kthread started\n", __func__, __LINE__);
 667
 668         do {
 669                 try_to_freeze();
 670
 671                 pr_debug("%s:%u: probing...\n", __func__, __LINE__);
 672
 673                 do {
 674                         result = ps3_repository_find_device(repo);
 675
 676                         if (result == -ENODEV)
 677                                 pr_debug("%s:%u: nothing new\n", __func__,
 678                                         __LINE__);
 679                         else if (result)
 680                                 pr_debug("%s:%u: find device error.\n",
 681                                         __func__, __LINE__);
 682                         else {
 683                                 pr_debug("%s:%u: found device\n", __func__,
 684                                         __LINE__);
 685                                 ps3_register_repository_device(repo);
 686                                 ps3_repository_bump_device(repo);
 687                                 ms = 250;
 688                         }
 689                 } while (!result);
 690
 691                 pr_debug("%s:%u: ms %u\n", __func__, __LINE__, ms);
 692
 693                 if ( ms > 60000)
 694                         break;
 695
 696                 msleep_interruptible(ms);
 697
 698                 /* An exponential backoff. */
 699                 ms <<= 1;
 700
 701         } while (!kthread_should_stop());
 702
 703         pr_debug(" <- %s:%u: kthread finished\n", __func__, __LINE__);
 704
 705         return 0;
 706 }
 707
 708 /**
 709  * ps3_start_probe_thread - Starts the background probe thread.
 710  *
 711  */
 712
 713 static int __init ps3_start_probe_thread(enum ps3_bus_type bus_type)
 714 {
 715         int result;
 716         struct task_struct *task;
 717         static struct ps3_repository_device repo; /* must be static */
 718
 719         pr_debug(" -> %s:%d\n", __func__, __LINE__);
 720
 721         memset(&repo, 0, sizeof(repo));
 722
 723         repo.bus_type = bus_type;
 724
 725         result = ps3_repository_find_bus(repo.bus_type, 0, &repo.bus_index);
 726
 727         if (result) {
 728                 printk(KERN_ERR "%s: Cannot find bus (%d)\n", __func__, result);
 729                 return -ENODEV;
 730         }
 731
 732         result = ps3_repository_read_bus_id(repo.bus_index, &repo.bus_id);
 733
 734         if (result) {
 735                 printk(KERN_ERR "%s: read_bus_id failed %d\n", __func__,
 736                         result);
 737                 return -ENODEV;
 738         }
 739
 740         task = kthread_run(ps3_probe_thread, &repo, "ps3-probe-%u", bus_type);
 741
 742         if (IS_ERR(task)) {
 743                 result = PTR_ERR(task);
 744                 printk(KERN_ERR "%s: kthread_run failed %d\n", __func__,
 745                        result);
 746                 return result;
 747         }
 748
 749         pr_debug(" <- %s:%d\n", __func__, __LINE__);
 750         return 0;
 751 }
 752
 753 /**
 754  * ps3_register_devices - Probe the system and register devices found.
 755  *
 756  * A device_initcall() routine.
 757  */
 758
 759 static int __init ps3_register_devices(void)
 760 {
 761         int result;
 762
 763         if (!firmware_has_feature(FW_FEATURE_PS3_LV1))
 764                 return -ENODEV;
 765
 766         pr_debug(" -> %s:%d\n", __func__, __LINE__);
 767
 768         /* ps3_repository_dump_bus_info(); */
 769
 770         result = ps3_start_probe_thread(PS3_BUS_TYPE_STORAGE);
 771
 772         ps3_register_vuart_devices();
 773
 774         ps3_register_graphics_devices();
 775
 776         ps3_repository_find_devices(PS3_BUS_TYPE_SB,
 777                 ps3_register_repository_device);
 778
 779         ps3_register_sound_devices();
 780
 781         pr_debug(" <- %s:%d\n", __func__, __LINE__);
 782         return 0;
 783 }
 784
 785 device_initcall(ps3_register_devices);