1 // SPDX-License-Identifier: GPL-2.0-or-later 2 /* 3 * Driver for the media bay on the PowerBook 3400 and 2400. 4 * 5 * Copyright (C) 1998 Paul Mackerras. 6 * 7 * Various evolutions by Benjamin Herrenschmidt & Henry Worth 8 */ 9 #include <linux/types.h> 10 #include <linux/errno.h> 11 #include <linux/kernel.h> 12 #include <linux/delay.h> 13 #include <linux/sched.h> 14 #include <linux/timer.h> 15 #include <linux/stddef.h> 16 #include <linux/init.h> 17 #include <linux/kthread.h> 18 #include <linux/mutex.h> 19 #include <linux/pgtable.h> 20 21 #include <asm/io.h> 22 #include <asm/machdep.h> 23 #include <asm/pmac_feature.h> 24 #include <asm/mediabay.h> 25 #include <asm/sections.h> 26 #include <asm/ohare.h> 27 #include <asm/heathrow.h> 28 #include <asm/keylargo.h> 29 #include <linux/adb.h> 30 #include <linux/pmu.h> 31 32 #define MB_FCR32(bay, r) ((bay)->base + ((r) >> 2)) 33 #define MB_FCR8(bay, r) (((volatile u8 __iomem *)((bay)->base)) + (r)) 34 35 #define MB_IN32(bay,r) (in_le32(MB_FCR32(bay,r))) 36 #define MB_OUT32(bay,r,v) (out_le32(MB_FCR32(bay,r), (v))) 37 #define MB_BIS(bay,r,v) (MB_OUT32((bay), (r), MB_IN32((bay), r) | (v))) 38 #define MB_BIC(bay,r,v) (MB_OUT32((bay), (r), MB_IN32((bay), r) & ~(v))) 39 #define MB_IN8(bay,r) (in_8(MB_FCR8(bay,r))) 40 #define MB_OUT8(bay,r,v) (out_8(MB_FCR8(bay,r), (v))) 41 42 struct media_bay_info; 43 44 struct mb_ops { 45 char* name; 46 void (*init)(struct media_bay_info *bay); 47 u8 (*content)(struct media_bay_info *bay); 48 void (*power)(struct media_bay_info *bay, int on_off); 49 int (*setup_bus)(struct media_bay_info *bay, u8 device_id); 50 void (*un_reset)(struct media_bay_info *bay); 51 void (*un_reset_ide)(struct media_bay_info *bay); 52 }; 53 54 struct media_bay_info { 55 u32 __iomem *base; 56 int content_id; 57 int state; 58 int last_value; 59 int value_count; 60 int timer; 61 struct macio_dev *mdev; 62 const struct mb_ops* ops; 63 int index; 64 int cached_gpio; 65 int sleeping; 66 int user_lock; 67 struct mutex lock; 68 }; 69 70 #define MAX_BAYS 2 71 72 static struct media_bay_info media_bays[MAX_BAYS]; 73 static int media_bay_count = 0; 74 75 /* 76 * Wait that number of ms between each step in normal polling mode 77 */ 78 #define MB_POLL_DELAY 25 79 80 /* 81 * Consider the media-bay ID value stable if it is the same for 82 * this number of milliseconds 83 */ 84 #define MB_STABLE_DELAY 100 85 86 /* Wait after powering up the media bay this delay in ms 87 * timeout bumped for some powerbooks 88 */ 89 #define MB_POWER_DELAY 200 90 91 /* 92 * Hold the media-bay reset signal true for this many ticks 93 * after a device is inserted before releasing it. 94 */ 95 #define MB_RESET_DELAY 50 96 97 /* 98 * Wait this long after the reset signal is released and before doing 99 * further operations. After this delay, the IDE reset signal is released 100 * too for an IDE device 101 */ 102 #define MB_SETUP_DELAY 100 103 104 /* 105 * Wait this many ticks after an IDE device (e.g. CD-ROM) is inserted 106 * (or until the device is ready) before calling into the driver 107 */ 108 #define MB_IDE_WAIT 1000 109 110 /* 111 * States of a media bay 112 */ 113 enum { 114 mb_empty = 0, /* Idle */ 115 mb_powering_up, /* power bit set, waiting MB_POWER_DELAY */ 116 mb_enabling_bay, /* enable bits set, waiting MB_RESET_DELAY */ 117 mb_resetting, /* reset bit unset, waiting MB_SETUP_DELAY */ 118 mb_ide_resetting, /* IDE reset bit unser, waiting MB_IDE_WAIT */ 119 mb_up, /* Media bay full */ 120 mb_powering_down /* Powering down (avoid too fast down/up) */ 121 }; 122 123 #define MB_POWER_SOUND 0x08 124 #define MB_POWER_FLOPPY 0x04 125 #define MB_POWER_ATA 0x02 126 #define MB_POWER_PCI 0x01 127 #define MB_POWER_OFF 0x00 128 129 /* 130 * Functions for polling content of media bay 131 */ 132 133 static u8 134 ohare_mb_content(struct media_bay_info *bay) 135 { 136 return (MB_IN32(bay, OHARE_MBCR) >> 12) & 7; 137 } 138 139 static u8 140 heathrow_mb_content(struct media_bay_info *bay) 141 { 142 return (MB_IN32(bay, HEATHROW_MBCR) >> 12) & 7; 143 } 144 145 static u8 146 keylargo_mb_content(struct media_bay_info *bay) 147 { 148 int new_gpio; 149 150 new_gpio = MB_IN8(bay, KL_GPIO_MEDIABAY_IRQ) & KEYLARGO_GPIO_INPUT_DATA; 151 if (new_gpio) { 152 bay->cached_gpio = new_gpio; 153 return MB_NO; 154 } else if (bay->cached_gpio != new_gpio) { 155 MB_BIS(bay, KEYLARGO_MBCR, KL_MBCR_MB0_ENABLE); 156 (void)MB_IN32(bay, KEYLARGO_MBCR); 157 udelay(5); 158 MB_BIC(bay, KEYLARGO_MBCR, 0x0000000F); 159 (void)MB_IN32(bay, KEYLARGO_MBCR); 160 udelay(5); 161 bay->cached_gpio = new_gpio; 162 } 163 return (MB_IN32(bay, KEYLARGO_MBCR) >> 4) & 7; 164 } 165 166 /* 167 * Functions for powering up/down the bay, puts the bay device 168 * into reset state as well 169 */ 170 171 static void 172 ohare_mb_power(struct media_bay_info* bay, int on_off) 173 { 174 if (on_off) { 175 /* Power up device, assert it's reset line */ 176 MB_BIC(bay, OHARE_FCR, OH_BAY_RESET_N); 177 MB_BIC(bay, OHARE_FCR, OH_BAY_POWER_N); 178 } else { 179 /* Disable all devices */ 180 MB_BIC(bay, OHARE_FCR, OH_BAY_DEV_MASK); 181 MB_BIC(bay, OHARE_FCR, OH_FLOPPY_ENABLE); 182 /* Cut power from bay, release reset line */ 183 MB_BIS(bay, OHARE_FCR, OH_BAY_POWER_N); 184 MB_BIS(bay, OHARE_FCR, OH_BAY_RESET_N); 185 MB_BIS(bay, OHARE_FCR, OH_IDE1_RESET_N); 186 } 187 MB_BIC(bay, OHARE_MBCR, 0x00000F00); 188 } 189 190 static void 191 heathrow_mb_power(struct media_bay_info* bay, int on_off) 192 { 193 if (on_off) { 194 /* Power up device, assert it's reset line */ 195 MB_BIC(bay, HEATHROW_FCR, HRW_BAY_RESET_N); 196 MB_BIC(bay, HEATHROW_FCR, HRW_BAY_POWER_N); 197 } else { 198 /* Disable all devices */ 199 MB_BIC(bay, HEATHROW_FCR, HRW_BAY_DEV_MASK); 200 MB_BIC(bay, HEATHROW_FCR, HRW_SWIM_ENABLE); 201 /* Cut power from bay, release reset line */ 202 MB_BIS(bay, HEATHROW_FCR, HRW_BAY_POWER_N); 203 MB_BIS(bay, HEATHROW_FCR, HRW_BAY_RESET_N); 204 MB_BIS(bay, HEATHROW_FCR, HRW_IDE1_RESET_N); 205 } 206 MB_BIC(bay, HEATHROW_MBCR, 0x00000F00); 207 } 208 209 static void 210 keylargo_mb_power(struct media_bay_info* bay, int on_off) 211 { 212 if (on_off) { 213 /* Power up device, assert it's reset line */ 214 MB_BIC(bay, KEYLARGO_MBCR, KL_MBCR_MB0_DEV_RESET); 215 MB_BIC(bay, KEYLARGO_MBCR, KL_MBCR_MB0_DEV_POWER); 216 } else { 217 /* Disable all devices */ 218 MB_BIC(bay, KEYLARGO_MBCR, KL_MBCR_MB0_DEV_MASK); 219 MB_BIC(bay, KEYLARGO_FCR1, KL1_EIDE0_ENABLE); 220 /* Cut power from bay, release reset line */ 221 MB_BIS(bay, KEYLARGO_MBCR, KL_MBCR_MB0_DEV_POWER); 222 MB_BIS(bay, KEYLARGO_MBCR, KL_MBCR_MB0_DEV_RESET); 223 MB_BIS(bay, KEYLARGO_FCR1, KL1_EIDE0_RESET_N); 224 } 225 MB_BIC(bay, KEYLARGO_MBCR, 0x0000000F); 226 } 227 228 /* 229 * Functions for configuring the media bay for a given type of device, 230 * enable the related busses 231 */ 232 233 static int 234 ohare_mb_setup_bus(struct media_bay_info* bay, u8 device_id) 235 { 236 switch(device_id) { 237 case MB_FD: 238 case MB_FD1: 239 MB_BIS(bay, OHARE_FCR, OH_BAY_FLOPPY_ENABLE); 240 MB_BIS(bay, OHARE_FCR, OH_FLOPPY_ENABLE); 241 return 0; 242 case MB_CD: 243 MB_BIC(bay, OHARE_FCR, OH_IDE1_RESET_N); 244 MB_BIS(bay, OHARE_FCR, OH_BAY_IDE_ENABLE); 245 return 0; 246 case MB_PCI: 247 MB_BIS(bay, OHARE_FCR, OH_BAY_PCI_ENABLE); 248 return 0; 249 } 250 return -ENODEV; 251 } 252 253 static int 254 heathrow_mb_setup_bus(struct media_bay_info* bay, u8 device_id) 255 { 256 switch(device_id) { 257 case MB_FD: 258 case MB_FD1: 259 MB_BIS(bay, HEATHROW_FCR, HRW_BAY_FLOPPY_ENABLE); 260 MB_BIS(bay, HEATHROW_FCR, HRW_SWIM_ENABLE); 261 return 0; 262 case MB_CD: 263 MB_BIC(bay, HEATHROW_FCR, HRW_IDE1_RESET_N); 264 MB_BIS(bay, HEATHROW_FCR, HRW_BAY_IDE_ENABLE); 265 return 0; 266 case MB_PCI: 267 MB_BIS(bay, HEATHROW_FCR, HRW_BAY_PCI_ENABLE); 268 return 0; 269 } 270 return -ENODEV; 271 } 272 273 static int 274 keylargo_mb_setup_bus(struct media_bay_info* bay, u8 device_id) 275 { 276 switch(device_id) { 277 case MB_CD: 278 MB_BIS(bay, KEYLARGO_MBCR, KL_MBCR_MB0_IDE_ENABLE); 279 MB_BIC(bay, KEYLARGO_FCR1, KL1_EIDE0_RESET_N); 280 MB_BIS(bay, KEYLARGO_FCR1, KL1_EIDE0_ENABLE); 281 return 0; 282 case MB_PCI: 283 MB_BIS(bay, KEYLARGO_MBCR, KL_MBCR_MB0_PCI_ENABLE); 284 return 0; 285 case MB_SOUND: 286 MB_BIS(bay, KEYLARGO_MBCR, KL_MBCR_MB0_SOUND_ENABLE); 287 return 0; 288 } 289 return -ENODEV; 290 } 291 292 /* 293 * Functions for tweaking resets 294 */ 295 296 static void 297 ohare_mb_un_reset(struct media_bay_info* bay) 298 { 299 MB_BIS(bay, OHARE_FCR, OH_BAY_RESET_N); 300 } 301 302 static void keylargo_mb_init(struct media_bay_info *bay) 303 { 304 MB_BIS(bay, KEYLARGO_MBCR, KL_MBCR_MB0_ENABLE); 305 } 306 307 static void heathrow_mb_un_reset(struct media_bay_info* bay) 308 { 309 MB_BIS(bay, HEATHROW_FCR, HRW_BAY_RESET_N); 310 } 311 312 static void keylargo_mb_un_reset(struct media_bay_info* bay) 313 { 314 MB_BIS(bay, KEYLARGO_MBCR, KL_MBCR_MB0_DEV_RESET); 315 } 316 317 static void ohare_mb_un_reset_ide(struct media_bay_info* bay) 318 { 319 MB_BIS(bay, OHARE_FCR, OH_IDE1_RESET_N); 320 } 321 322 static void heathrow_mb_un_reset_ide(struct media_bay_info* bay) 323 { 324 MB_BIS(bay, HEATHROW_FCR, HRW_IDE1_RESET_N); 325 } 326 327 static void keylargo_mb_un_reset_ide(struct media_bay_info* bay) 328 { 329 MB_BIS(bay, KEYLARGO_FCR1, KL1_EIDE0_RESET_N); 330 } 331 332 static inline void set_mb_power(struct media_bay_info* bay, int onoff) 333 { 334 /* Power up up and assert the bay reset line */ 335 if (onoff) { 336 bay->ops->power(bay, 1); 337 bay->state = mb_powering_up; 338 pr_debug("mediabay%d: powering up\n", bay->index); 339 } else { 340 /* Make sure everything is powered down & disabled */ 341 bay->ops->power(bay, 0); 342 bay->state = mb_powering_down; 343 pr_debug("mediabay%d: powering down\n", bay->index); 344 } 345 bay->timer = msecs_to_jiffies(MB_POWER_DELAY); 346 } 347 348 static void poll_media_bay(struct media_bay_info* bay) 349 { 350 int id = bay->ops->content(bay); 351 352 static char *mb_content_types[] = { 353 "a floppy drive", 354 "a floppy drive", 355 "an unsupported audio device", 356 "an ATA device", 357 "an unsupported PCI device", 358 "an unknown device", 359 }; 360 361 if (id != bay->last_value) { 362 bay->last_value = id; 363 bay->value_count = 0; 364 return; 365 } 366 if (id == bay->content_id) 367 return; 368 369 bay->value_count += msecs_to_jiffies(MB_POLL_DELAY); 370 if (bay->value_count >= msecs_to_jiffies(MB_STABLE_DELAY)) { 371 /* If the device type changes without going thru 372 * "MB_NO", we force a pass by "MB_NO" to make sure 373 * things are properly reset 374 */ 375 if ((id != MB_NO) && (bay->content_id != MB_NO)) { 376 id = MB_NO; 377 pr_debug("mediabay%d: forcing MB_NO\n", bay->index); 378 } 379 pr_debug("mediabay%d: switching to %d\n", bay->index, id); 380 set_mb_power(bay, id != MB_NO); 381 bay->content_id = id; 382 if (id >= MB_NO || id < 0) 383 printk(KERN_INFO "mediabay%d: Bay is now empty\n", bay->index); 384 else 385 printk(KERN_INFO "mediabay%d: Bay contains %s\n", 386 bay->index, mb_content_types[id]); 387 } 388 } 389 390 int check_media_bay(struct macio_dev *baydev) 391 { 392 struct media_bay_info* bay; 393 int id; 394 395 if (baydev == NULL) 396 return MB_NO; 397 398 /* This returns an instant snapshot, not locking, sine 399 * we may be called with the bay lock held. The resulting 400 * fuzzyness of the result if called at the wrong time is 401 * not actually a huge deal 402 */ 403 bay = macio_get_drvdata(baydev); 404 if (bay == NULL) 405 return MB_NO; 406 id = bay->content_id; 407 if (bay->state != mb_up) 408 return MB_NO; 409 if (id == MB_FD1) 410 return MB_FD; 411 return id; 412 } 413 EXPORT_SYMBOL_GPL(check_media_bay); 414 415 void lock_media_bay(struct macio_dev *baydev) 416 { 417 struct media_bay_info* bay; 418 419 if (baydev == NULL) 420 return; 421 bay = macio_get_drvdata(baydev); 422 if (bay == NULL) 423 return; 424 mutex_lock(&bay->lock); 425 bay->user_lock = 1; 426 } 427 EXPORT_SYMBOL_GPL(lock_media_bay); 428 429 void unlock_media_bay(struct macio_dev *baydev) 430 { 431 struct media_bay_info* bay; 432 433 if (baydev == NULL) 434 return; 435 bay = macio_get_drvdata(baydev); 436 if (bay == NULL) 437 return; 438 if (bay->user_lock) { 439 bay->user_lock = 0; 440 mutex_unlock(&bay->lock); 441 } 442 } 443 EXPORT_SYMBOL_GPL(unlock_media_bay); 444 445 static int mb_broadcast_hotplug(struct device *dev, void *data) 446 { 447 struct media_bay_info* bay = data; 448 struct macio_dev *mdev; 449 struct macio_driver *drv; 450 int state; 451 452 if (dev->bus != &macio_bus_type) 453 return 0; 454 455 state = bay->state == mb_up ? bay->content_id : MB_NO; 456 if (state == MB_FD1) 457 state = MB_FD; 458 mdev = to_macio_device(dev); 459 drv = to_macio_driver(dev->driver); 460 if (dev->driver && drv->mediabay_event) 461 drv->mediabay_event(mdev, state); 462 return 0; 463 } 464 465 static void media_bay_step(int i) 466 { 467 struct media_bay_info* bay = &media_bays[i]; 468 469 /* We don't poll when powering down */ 470 if (bay->state != mb_powering_down) 471 poll_media_bay(bay); 472 473 /* If timer expired run state machine */ 474 if (bay->timer != 0) { 475 bay->timer -= msecs_to_jiffies(MB_POLL_DELAY); 476 if (bay->timer > 0) 477 return; 478 bay->timer = 0; 479 } 480 481 switch(bay->state) { 482 case mb_powering_up: 483 if (bay->ops->setup_bus(bay, bay->last_value) < 0) { 484 pr_debug("mediabay%d: device not supported (kind:%d)\n", 485 i, bay->content_id); 486 set_mb_power(bay, 0); 487 break; 488 } 489 bay->timer = msecs_to_jiffies(MB_RESET_DELAY); 490 bay->state = mb_enabling_bay; 491 pr_debug("mediabay%d: enabling (kind:%d)\n", i, bay->content_id); 492 break; 493 case mb_enabling_bay: 494 bay->ops->un_reset(bay); 495 bay->timer = msecs_to_jiffies(MB_SETUP_DELAY); 496 bay->state = mb_resetting; 497 pr_debug("mediabay%d: releasing bay reset (kind:%d)\n", 498 i, bay->content_id); 499 break; 500 case mb_resetting: 501 if (bay->content_id != MB_CD) { 502 pr_debug("mediabay%d: bay is up (kind:%d)\n", i, 503 bay->content_id); 504 bay->state = mb_up; 505 device_for_each_child(&bay->mdev->ofdev.dev, 506 bay, mb_broadcast_hotplug); 507 break; 508 } 509 pr_debug("mediabay%d: releasing ATA reset (kind:%d)\n", 510 i, bay->content_id); 511 bay->ops->un_reset_ide(bay); 512 bay->timer = msecs_to_jiffies(MB_IDE_WAIT); 513 bay->state = mb_ide_resetting; 514 break; 515 516 case mb_ide_resetting: 517 pr_debug("mediabay%d: bay is up (kind:%d)\n", i, bay->content_id); 518 bay->state = mb_up; 519 device_for_each_child(&bay->mdev->ofdev.dev, 520 bay, mb_broadcast_hotplug); 521 break; 522 523 case mb_powering_down: 524 bay->state = mb_empty; 525 device_for_each_child(&bay->mdev->ofdev.dev, 526 bay, mb_broadcast_hotplug); 527 pr_debug("mediabay%d: end of power down\n", i); 528 break; 529 } 530 } 531 532 /* 533 * This procedure runs as a kernel thread to poll the media bay 534 * once each tick and register and unregister the IDE interface 535 * with the IDE driver. It needs to be a thread because 536 * ide_register can't be called from interrupt context. 537 */ 538 static int media_bay_task(void *x) 539 { 540 int i; 541 542 while (!kthread_should_stop()) { 543 for (i = 0; i < media_bay_count; ++i) { 544 mutex_lock(&media_bays[i].lock); 545 if (!media_bays[i].sleeping) 546 media_bay_step(i); 547 mutex_unlock(&media_bays[i].lock); 548 } 549 550 msleep_interruptible(MB_POLL_DELAY); 551 } 552 return 0; 553 } 554 555 static int media_bay_attach(struct macio_dev *mdev, 556 const struct of_device_id *match) 557 { 558 struct media_bay_info* bay; 559 u32 __iomem *regbase; 560 struct device_node *ofnode; 561 unsigned long base; 562 int i; 563 564 ofnode = mdev->ofdev.dev.of_node; 565 566 if (macio_resource_count(mdev) < 1) 567 return -ENODEV; 568 if (macio_request_resources(mdev, "media-bay")) 569 return -EBUSY; 570 /* Media bay registers are located at the beginning of the 571 * mac-io chip, for now, we trick and align down the first 572 * resource passed in 573 */ 574 base = macio_resource_start(mdev, 0) & 0xffff0000u; 575 regbase = (u32 __iomem *)ioremap(base, 0x100); 576 if (regbase == NULL) { 577 macio_release_resources(mdev); 578 return -ENOMEM; 579 } 580 581 i = media_bay_count++; 582 bay = &media_bays[i]; 583 bay->mdev = mdev; 584 bay->base = regbase; 585 bay->index = i; 586 bay->ops = match->data; 587 bay->sleeping = 0; 588 mutex_init(&bay->lock); 589 590 /* Init HW probing */ 591 if (bay->ops->init) 592 bay->ops->init(bay); 593 594 printk(KERN_INFO "mediabay%d: Registered %s media-bay\n", i, bay->ops->name); 595 596 /* Force an immediate detect */ 597 set_mb_power(bay, 0); 598 msleep(MB_POWER_DELAY); 599 bay->content_id = MB_NO; 600 bay->last_value = bay->ops->content(bay); 601 bay->value_count = msecs_to_jiffies(MB_STABLE_DELAY); 602 bay->state = mb_empty; 603 604 /* Mark us ready by filling our mdev data */ 605 macio_set_drvdata(mdev, bay); 606 607 /* Startup kernel thread */ 608 if (i == 0) 609 kthread_run(media_bay_task, NULL, "media-bay"); 610 611 return 0; 612 613 } 614 615 static int media_bay_suspend(struct macio_dev *mdev, pm_message_t state) 616 { 617 struct media_bay_info *bay = macio_get_drvdata(mdev); 618 619 if (state.event != mdev->ofdev.dev.power.power_state.event 620 && (state.event & PM_EVENT_SLEEP)) { 621 mutex_lock(&bay->lock); 622 bay->sleeping = 1; 623 set_mb_power(bay, 0); 624 mutex_unlock(&bay->lock); 625 msleep(MB_POLL_DELAY); 626 mdev->ofdev.dev.power.power_state = state; 627 } 628 return 0; 629 } 630 631 static int media_bay_resume(struct macio_dev *mdev) 632 { 633 struct media_bay_info *bay = macio_get_drvdata(mdev); 634 635 if (mdev->ofdev.dev.power.power_state.event != PM_EVENT_ON) { 636 mdev->ofdev.dev.power.power_state = PMSG_ON; 637 638 /* We re-enable the bay using it's previous content 639 only if it did not change. Note those bozo timings, 640 they seem to help the 3400 get it right. 641 */ 642 /* Force MB power to 0 */ 643 mutex_lock(&bay->lock); 644 set_mb_power(bay, 0); 645 msleep(MB_POWER_DELAY); 646 if (bay->ops->content(bay) != bay->content_id) { 647 printk("mediabay%d: Content changed during sleep...\n", bay->index); 648 mutex_unlock(&bay->lock); 649 return 0; 650 } 651 set_mb_power(bay, 1); 652 bay->last_value = bay->content_id; 653 bay->value_count = msecs_to_jiffies(MB_STABLE_DELAY); 654 bay->timer = msecs_to_jiffies(MB_POWER_DELAY); 655 do { 656 msleep(MB_POLL_DELAY); 657 media_bay_step(bay->index); 658 } while((bay->state != mb_empty) && 659 (bay->state != mb_up)); 660 bay->sleeping = 0; 661 mutex_unlock(&bay->lock); 662 } 663 return 0; 664 } 665 666 667 /* Definitions of "ops" structures. 668 */ 669 static const struct mb_ops ohare_mb_ops = { 670 .name = "Ohare", 671 .content = ohare_mb_content, 672 .power = ohare_mb_power, 673 .setup_bus = ohare_mb_setup_bus, 674 .un_reset = ohare_mb_un_reset, 675 .un_reset_ide = ohare_mb_un_reset_ide, 676 }; 677 678 static const struct mb_ops heathrow_mb_ops = { 679 .name = "Heathrow", 680 .content = heathrow_mb_content, 681 .power = heathrow_mb_power, 682 .setup_bus = heathrow_mb_setup_bus, 683 .un_reset = heathrow_mb_un_reset, 684 .un_reset_ide = heathrow_mb_un_reset_ide, 685 }; 686 687 static const struct mb_ops keylargo_mb_ops = { 688 .name = "KeyLargo", 689 .init = keylargo_mb_init, 690 .content = keylargo_mb_content, 691 .power = keylargo_mb_power, 692 .setup_bus = keylargo_mb_setup_bus, 693 .un_reset = keylargo_mb_un_reset, 694 .un_reset_ide = keylargo_mb_un_reset_ide, 695 }; 696 697 /* 698 * It seems that the bit for the media-bay interrupt in the IRQ_LEVEL 699 * register is always set when there is something in the media bay. 700 * This causes problems for the interrupt code if we attach an interrupt 701 * handler to the media-bay interrupt, because it tends to go into 702 * an infinite loop calling the media bay interrupt handler. 703 * Therefore we do it all by polling the media bay once each tick. 704 */ 705 706 static const struct of_device_id media_bay_match[] = 707 { 708 { 709 .name = "media-bay", 710 .compatible = "keylargo-media-bay", 711 .data = &keylargo_mb_ops, 712 }, 713 { 714 .name = "media-bay", 715 .compatible = "heathrow-media-bay", 716 .data = &heathrow_mb_ops, 717 }, 718 { 719 .name = "media-bay", 720 .compatible = "ohare-media-bay", 721 .data = &ohare_mb_ops, 722 }, 723 {}, 724 }; 725 726 static struct macio_driver media_bay_driver = 727 { 728 .driver = { 729 .name = "media-bay", 730 .of_match_table = media_bay_match, 731 }, 732 .probe = media_bay_attach, 733 .suspend = media_bay_suspend, 734 .resume = media_bay_resume 735 }; 736 737 static int __init media_bay_init(void) 738 { 739 int i; 740 741 for (i=0; i<MAX_BAYS; i++) { 742 memset((char *)&media_bays[i], 0, sizeof(struct media_bay_info)); 743 media_bays[i].content_id = -1; 744 } 745 if (!machine_is(powermac)) 746 return 0; 747 748 macio_register_driver(&media_bay_driver); 749 750 return 0; 751 } 752 753 device_initcall(media_bay_init); 754