1/* 2 * Driver for the media bay on the PowerBook 3400 and 2400. 3 * 4 * Copyright (C) 1998 Paul Mackerras. 5 * 6 * Various evolutions by Benjamin Herrenschmidt & Henry Worth 7 * 8 * This program is free software; you can redistribute it and/or 9 * modify it under the terms of the GNU General Public License 10 * as published by the Free Software Foundation; either version 11 * 2 of the License, or (at your option) any later version. 12 */ 13#include <linux/types.h> 14#include <linux/errno.h> 15#include <linux/kernel.h> 16#include <linux/delay.h> 17#include <linux/sched.h> 18#include <linux/timer.h> 19#include <linux/stddef.h> 20#include <linux/init.h> 21#include <linux/kthread.h> 22#include <linux/mutex.h> 23#include <asm/prom.h> 24#include <asm/pgtable.h> 25#include <asm/io.h> 26#include <asm/machdep.h> 27#include <asm/pmac_feature.h> 28#include <asm/mediabay.h> 29#include <asm/sections.h> 30#include <asm/ohare.h> 31#include <asm/heathrow.h> 32#include <asm/keylargo.h> 33#include <linux/adb.h> 34#include <linux/pmu.h> 35 36#define MB_FCR32(bay, r) ((bay)->base + ((r) >> 2)) 37#define MB_FCR8(bay, r) (((volatile u8 __iomem *)((bay)->base)) + (r)) 38 39#define MB_IN32(bay,r) (in_le32(MB_FCR32(bay,r))) 40#define MB_OUT32(bay,r,v) (out_le32(MB_FCR32(bay,r), (v))) 41#define MB_BIS(bay,r,v) (MB_OUT32((bay), (r), MB_IN32((bay), r) | (v))) 42#define MB_BIC(bay,r,v) (MB_OUT32((bay), (r), MB_IN32((bay), r) & ~(v))) 43#define MB_IN8(bay,r) (in_8(MB_FCR8(bay,r))) 44#define MB_OUT8(bay,r,v) (out_8(MB_FCR8(bay,r), (v))) 45 46struct media_bay_info; 47 48struct mb_ops { 49 char* name; 50 void (*init)(struct media_bay_info *bay); 51 u8 (*content)(struct media_bay_info *bay); 52 void (*power)(struct media_bay_info *bay, int on_off); 53 int (*setup_bus)(struct media_bay_info *bay, u8 device_id); 54 void (*un_reset)(struct media_bay_info *bay); 55 void (*un_reset_ide)(struct media_bay_info *bay); 56}; 57 58struct media_bay_info { 59 u32 __iomem *base; 60 int content_id; 61 int state; 62 int last_value; 63 int value_count; 64 int timer; 65 struct macio_dev *mdev; 66 const struct mb_ops* ops; 67 int index; 68 int cached_gpio; 69 int sleeping; 70 int user_lock; 71 struct mutex lock; 72}; 73 74#define MAX_BAYS 2 75 76static struct media_bay_info media_bays[MAX_BAYS]; 77static int media_bay_count = 0; 78 79/* 80 * Wait that number of ms between each step in normal polling mode 81 */ 82#define MB_POLL_DELAY 25 83 84/* 85 * Consider the media-bay ID value stable if it is the same for 86 * this number of milliseconds 87 */ 88#define MB_STABLE_DELAY 100 89 90/* Wait after powering up the media bay this delay in ms 91 * timeout bumped for some powerbooks 92 */ 93#define MB_POWER_DELAY 200 94 95/* 96 * Hold the media-bay reset signal true for this many ticks 97 * after a device is inserted before releasing it. 98 */ 99#define MB_RESET_DELAY 50 100 101/* 102 * Wait this long after the reset signal is released and before doing 103 * further operations. After this delay, the IDE reset signal is released 104 * too for an IDE device 105 */ 106#define MB_SETUP_DELAY 100 107 108/* 109 * Wait this many ticks after an IDE device (e.g. CD-ROM) is inserted 110 * (or until the device is ready) before calling into the driver 111 */ 112#define MB_IDE_WAIT 1000 113 114/* 115 * States of a media bay 116 */ 117enum { 118 mb_empty = 0, /* Idle */ 119 mb_powering_up, /* power bit set, waiting MB_POWER_DELAY */ 120 mb_enabling_bay, /* enable bits set, waiting MB_RESET_DELAY */ 121 mb_resetting, /* reset bit unset, waiting MB_SETUP_DELAY */ 122 mb_ide_resetting, /* IDE reset bit unser, waiting MB_IDE_WAIT */ 123 mb_up, /* Media bay full */ 124 mb_powering_down /* Powering down (avoid too fast down/up) */ 125}; 126 127#define MB_POWER_SOUND 0x08 128#define MB_POWER_FLOPPY 0x04 129#define MB_POWER_ATA 0x02 130#define MB_POWER_PCI 0x01 131#define MB_POWER_OFF 0x00 132 133/* 134 * Functions for polling content of media bay 135 */ 136 137static u8 138ohare_mb_content(struct media_bay_info *bay) 139{ 140 return (MB_IN32(bay, OHARE_MBCR) >> 12) & 7; 141} 142 143static u8 144heathrow_mb_content(struct media_bay_info *bay) 145{ 146 return (MB_IN32(bay, HEATHROW_MBCR) >> 12) & 7; 147} 148 149static u8 150keylargo_mb_content(struct media_bay_info *bay) 151{ 152 int new_gpio; 153 154 new_gpio = MB_IN8(bay, KL_GPIO_MEDIABAY_IRQ) & KEYLARGO_GPIO_INPUT_DATA; 155 if (new_gpio) { 156 bay->cached_gpio = new_gpio; 157 return MB_NO; 158 } else if (bay->cached_gpio != new_gpio) { 159 MB_BIS(bay, KEYLARGO_MBCR, KL_MBCR_MB0_ENABLE); 160 (void)MB_IN32(bay, KEYLARGO_MBCR); 161 udelay(5); 162 MB_BIC(bay, KEYLARGO_MBCR, 0x0000000F); 163 (void)MB_IN32(bay, KEYLARGO_MBCR); 164 udelay(5); 165 bay->cached_gpio = new_gpio; 166 } 167 return (MB_IN32(bay, KEYLARGO_MBCR) >> 4) & 7; 168} 169 170/* 171 * Functions for powering up/down the bay, puts the bay device 172 * into reset state as well 173 */ 174 175static void 176ohare_mb_power(struct media_bay_info* bay, int on_off) 177{ 178 if (on_off) { 179 /* Power up device, assert it's reset line */ 180 MB_BIC(bay, OHARE_FCR, OH_BAY_RESET_N); 181 MB_BIC(bay, OHARE_FCR, OH_BAY_POWER_N); 182 } else { 183 /* Disable all devices */ 184 MB_BIC(bay, OHARE_FCR, OH_BAY_DEV_MASK); 185 MB_BIC(bay, OHARE_FCR, OH_FLOPPY_ENABLE); 186 /* Cut power from bay, release reset line */ 187 MB_BIS(bay, OHARE_FCR, OH_BAY_POWER_N); 188 MB_BIS(bay, OHARE_FCR, OH_BAY_RESET_N); 189 MB_BIS(bay, OHARE_FCR, OH_IDE1_RESET_N); 190 } 191 MB_BIC(bay, OHARE_MBCR, 0x00000F00); 192} 193 194static void 195heathrow_mb_power(struct media_bay_info* bay, int on_off) 196{ 197 if (on_off) { 198 /* Power up device, assert it's reset line */ 199 MB_BIC(bay, HEATHROW_FCR, HRW_BAY_RESET_N); 200 MB_BIC(bay, HEATHROW_FCR, HRW_BAY_POWER_N); 201 } else { 202 /* Disable all devices */ 203 MB_BIC(bay, HEATHROW_FCR, HRW_BAY_DEV_MASK); 204 MB_BIC(bay, HEATHROW_FCR, HRW_SWIM_ENABLE); 205 /* Cut power from bay, release reset line */ 206 MB_BIS(bay, HEATHROW_FCR, HRW_BAY_POWER_N); 207 MB_BIS(bay, HEATHROW_FCR, HRW_BAY_RESET_N); 208 MB_BIS(bay, HEATHROW_FCR, HRW_IDE1_RESET_N); 209 } 210 MB_BIC(bay, HEATHROW_MBCR, 0x00000F00); 211} 212 213static void 214keylargo_mb_power(struct media_bay_info* bay, int on_off) 215{ 216 if (on_off) { 217 /* Power up device, assert it's reset line */ 218 MB_BIC(bay, KEYLARGO_MBCR, KL_MBCR_MB0_DEV_RESET); 219 MB_BIC(bay, KEYLARGO_MBCR, KL_MBCR_MB0_DEV_POWER); 220 } else { 221 /* Disable all devices */ 222 MB_BIC(bay, KEYLARGO_MBCR, KL_MBCR_MB0_DEV_MASK); 223 MB_BIC(bay, KEYLARGO_FCR1, KL1_EIDE0_ENABLE); 224 /* Cut power from bay, release reset line */ 225 MB_BIS(bay, KEYLARGO_MBCR, KL_MBCR_MB0_DEV_POWER); 226 MB_BIS(bay, KEYLARGO_MBCR, KL_MBCR_MB0_DEV_RESET); 227 MB_BIS(bay, KEYLARGO_FCR1, KL1_EIDE0_RESET_N); 228 } 229 MB_BIC(bay, KEYLARGO_MBCR, 0x0000000F); 230} 231 232/* 233 * Functions for configuring the media bay for a given type of device, 234 * enable the related busses 235 */ 236 237static int 238ohare_mb_setup_bus(struct media_bay_info* bay, u8 device_id) 239{ 240 switch(device_id) { 241 case MB_FD: 242 case MB_FD1: 243 MB_BIS(bay, OHARE_FCR, OH_BAY_FLOPPY_ENABLE); 244 MB_BIS(bay, OHARE_FCR, OH_FLOPPY_ENABLE); 245 return 0; 246 case MB_CD: 247 MB_BIC(bay, OHARE_FCR, OH_IDE1_RESET_N); 248 MB_BIS(bay, OHARE_FCR, OH_BAY_IDE_ENABLE); 249 return 0; 250 case MB_PCI: 251 MB_BIS(bay, OHARE_FCR, OH_BAY_PCI_ENABLE); 252 return 0; 253 } 254 return -ENODEV; 255} 256 257static int 258heathrow_mb_setup_bus(struct media_bay_info* bay, u8 device_id) 259{ 260 switch(device_id) { 261 case MB_FD: 262 case MB_FD1: 263 MB_BIS(bay, HEATHROW_FCR, HRW_BAY_FLOPPY_ENABLE); 264 MB_BIS(bay, HEATHROW_FCR, HRW_SWIM_ENABLE); 265 return 0; 266 case MB_CD: 267 MB_BIC(bay, HEATHROW_FCR, HRW_IDE1_RESET_N); 268 MB_BIS(bay, HEATHROW_FCR, HRW_BAY_IDE_ENABLE); 269 return 0; 270 case MB_PCI: 271 MB_BIS(bay, HEATHROW_FCR, HRW_BAY_PCI_ENABLE); 272 return 0; 273 } 274 return -ENODEV; 275} 276 277static int 278keylargo_mb_setup_bus(struct media_bay_info* bay, u8 device_id) 279{ 280 switch(device_id) { 281 case MB_CD: 282 MB_BIS(bay, KEYLARGO_MBCR, KL_MBCR_MB0_IDE_ENABLE); 283 MB_BIC(bay, KEYLARGO_FCR1, KL1_EIDE0_RESET_N); 284 MB_BIS(bay, KEYLARGO_FCR1, KL1_EIDE0_ENABLE); 285 return 0; 286 case MB_PCI: 287 MB_BIS(bay, KEYLARGO_MBCR, KL_MBCR_MB0_PCI_ENABLE); 288 return 0; 289 case MB_SOUND: 290 MB_BIS(bay, KEYLARGO_MBCR, KL_MBCR_MB0_SOUND_ENABLE); 291 return 0; 292 } 293 return -ENODEV; 294} 295 296/* 297 * Functions for tweaking resets 298 */ 299 300static void 301ohare_mb_un_reset(struct media_bay_info* bay) 302{ 303 MB_BIS(bay, OHARE_FCR, OH_BAY_RESET_N); 304} 305 306static void keylargo_mb_init(struct media_bay_info *bay) 307{ 308 MB_BIS(bay, KEYLARGO_MBCR, KL_MBCR_MB0_ENABLE); 309} 310 311static void heathrow_mb_un_reset(struct media_bay_info* bay) 312{ 313 MB_BIS(bay, HEATHROW_FCR, HRW_BAY_RESET_N); 314} 315 316static void keylargo_mb_un_reset(struct media_bay_info* bay) 317{ 318 MB_BIS(bay, KEYLARGO_MBCR, KL_MBCR_MB0_DEV_RESET); 319} 320 321static void ohare_mb_un_reset_ide(struct media_bay_info* bay) 322{ 323 MB_BIS(bay, OHARE_FCR, OH_IDE1_RESET_N); 324} 325 326static void heathrow_mb_un_reset_ide(struct media_bay_info* bay) 327{ 328 MB_BIS(bay, HEATHROW_FCR, HRW_IDE1_RESET_N); 329} 330 331static void keylargo_mb_un_reset_ide(struct media_bay_info* bay) 332{ 333 MB_BIS(bay, KEYLARGO_FCR1, KL1_EIDE0_RESET_N); 334} 335 336static inline void set_mb_power(struct media_bay_info* bay, int onoff) 337{ 338 /* Power up up and assert the bay reset line */ 339 if (onoff) { 340 bay->ops->power(bay, 1); 341 bay->state = mb_powering_up; 342 pr_debug("mediabay%d: powering up\n", bay->index); 343 } else { 344 /* Make sure everything is powered down & disabled */ 345 bay->ops->power(bay, 0); 346 bay->state = mb_powering_down; 347 pr_debug("mediabay%d: powering down\n", bay->index); 348 } 349 bay->timer = msecs_to_jiffies(MB_POWER_DELAY); 350} 351 352static void poll_media_bay(struct media_bay_info* bay) 353{ 354 int id = bay->ops->content(bay); 355 356 static char *mb_content_types[] = { 357 "a floppy drive", 358 "a floppy drive", 359 "an unsupported audio device", 360 "an ATA device", 361 "an unsupported PCI device", 362 "an unknown device", 363 }; 364 365 if (id != bay->last_value) { 366 bay->last_value = id; 367 bay->value_count = 0; 368 return; 369 } 370 if (id == bay->content_id) 371 return; 372 373 bay->value_count += msecs_to_jiffies(MB_POLL_DELAY); 374 if (bay->value_count >= msecs_to_jiffies(MB_STABLE_DELAY)) { 375 /* If the device type changes without going thru 376 * "MB_NO", we force a pass by "MB_NO" to make sure 377 * things are properly reset 378 */ 379 if ((id != MB_NO) && (bay->content_id != MB_NO)) { 380 id = MB_NO; 381 pr_debug("mediabay%d: forcing MB_NO\n", bay->index); 382 } 383 pr_debug("mediabay%d: switching to %d\n", bay->index, id); 384 set_mb_power(bay, id != MB_NO); 385 bay->content_id = id; 386 if (id >= MB_NO || id < 0) 387 printk(KERN_INFO "mediabay%d: Bay is now empty\n", bay->index); 388 else 389 printk(KERN_INFO "mediabay%d: Bay contains %s\n", 390 bay->index, mb_content_types[id]); 391 } 392} 393 394int check_media_bay(struct macio_dev *baydev) 395{ 396 struct media_bay_info* bay; 397 int id; 398 399 if (baydev == NULL) 400 return MB_NO; 401 402 /* This returns an instant snapshot, not locking, sine 403 * we may be called with the bay lock held. The resulting 404 * fuzzyness of the result if called at the wrong time is 405 * not actually a huge deal 406 */ 407 bay = macio_get_drvdata(baydev); 408 if (bay == NULL) 409 return MB_NO; 410 id = bay->content_id; 411 if (bay->state != mb_up) 412 return MB_NO; 413 if (id == MB_FD1) 414 return MB_FD; 415 return id; 416} 417EXPORT_SYMBOL_GPL(check_media_bay); 418 419void lock_media_bay(struct macio_dev *baydev) 420{ 421 struct media_bay_info* bay; 422 423 if (baydev == NULL) 424 return; 425 bay = macio_get_drvdata(baydev); 426 if (bay == NULL) 427 return; 428 mutex_lock(&bay->lock); 429 bay->user_lock = 1; 430} 431EXPORT_SYMBOL_GPL(lock_media_bay); 432 433void unlock_media_bay(struct macio_dev *baydev) 434{ 435 struct media_bay_info* bay; 436 437 if (baydev == NULL) 438 return; 439 bay = macio_get_drvdata(baydev); 440 if (bay == NULL) 441 return; 442 if (bay->user_lock) { 443 bay->user_lock = 0; 444 mutex_unlock(&bay->lock); 445 } 446} 447EXPORT_SYMBOL_GPL(unlock_media_bay); 448 449static int mb_broadcast_hotplug(struct device *dev, void *data) 450{ 451 struct media_bay_info* bay = data; 452 struct macio_dev *mdev; 453 struct macio_driver *drv; 454 int state; 455 456 if (dev->bus != &macio_bus_type) 457 return 0; 458 459 state = bay->state == mb_up ? bay->content_id : MB_NO; 460 if (state == MB_FD1) 461 state = MB_FD; 462 mdev = to_macio_device(dev); 463 drv = to_macio_driver(dev->driver); 464 if (dev->driver && drv->mediabay_event) 465 drv->mediabay_event(mdev, state); 466 return 0; 467} 468 469static void media_bay_step(int i) 470{ 471 struct media_bay_info* bay = &media_bays[i]; 472 473 /* We don't poll when powering down */ 474 if (bay->state != mb_powering_down) 475 poll_media_bay(bay); 476 477 /* If timer expired run state machine */ 478 if (bay->timer != 0) { 479 bay->timer -= msecs_to_jiffies(MB_POLL_DELAY); 480 if (bay->timer > 0) 481 return; 482 bay->timer = 0; 483 } 484 485 switch(bay->state) { 486 case mb_powering_up: 487 if (bay->ops->setup_bus(bay, bay->last_value) < 0) { 488 pr_debug("mediabay%d: device not supported (kind:%d)\n", 489 i, bay->content_id); 490 set_mb_power(bay, 0); 491 break; 492 } 493 bay->timer = msecs_to_jiffies(MB_RESET_DELAY); 494 bay->state = mb_enabling_bay; 495 pr_debug("mediabay%d: enabling (kind:%d)\n", i, bay->content_id); 496 break; 497 case mb_enabling_bay: 498 bay->ops->un_reset(bay); 499 bay->timer = msecs_to_jiffies(MB_SETUP_DELAY); 500 bay->state = mb_resetting; 501 pr_debug("mediabay%d: releasing bay reset (kind:%d)\n", 502 i, bay->content_id); 503 break; 504 case mb_resetting: 505 if (bay->content_id != MB_CD) { 506 pr_debug("mediabay%d: bay is up (kind:%d)\n", i, 507 bay->content_id); 508 bay->state = mb_up; 509 device_for_each_child(&bay->mdev->ofdev.dev, 510 bay, mb_broadcast_hotplug); 511 break; 512 } 513 pr_debug("mediabay%d: releasing ATA reset (kind:%d)\n", 514 i, bay->content_id); 515 bay->ops->un_reset_ide(bay); 516 bay->timer = msecs_to_jiffies(MB_IDE_WAIT); 517 bay->state = mb_ide_resetting; 518 break; 519 520 case mb_ide_resetting: 521 pr_debug("mediabay%d: bay is up (kind:%d)\n", i, bay->content_id); 522 bay->state = mb_up; 523 device_for_each_child(&bay->mdev->ofdev.dev, 524 bay, mb_broadcast_hotplug); 525 break; 526 527 case mb_powering_down: 528 bay->state = mb_empty; 529 device_for_each_child(&bay->mdev->ofdev.dev, 530 bay, mb_broadcast_hotplug); 531 pr_debug("mediabay%d: end of power down\n", i); 532 break; 533 } 534} 535 536/* 537 * This procedure runs as a kernel thread to poll the media bay 538 * once each tick and register and unregister the IDE interface 539 * with the IDE driver. It needs to be a thread because 540 * ide_register can't be called from interrupt context. 541 */ 542static int media_bay_task(void *x) 543{ 544 int i; 545 546 while (!kthread_should_stop()) { 547 for (i = 0; i < media_bay_count; ++i) { 548 mutex_lock(&media_bays[i].lock); 549 if (!media_bays[i].sleeping) 550 media_bay_step(i); 551 mutex_unlock(&media_bays[i].lock); 552 } 553 554 msleep_interruptible(MB_POLL_DELAY); 555 } 556 return 0; 557} 558 559static int media_bay_attach(struct macio_dev *mdev, 560 const struct of_device_id *match) 561{ 562 struct media_bay_info* bay; 563 u32 __iomem *regbase; 564 struct device_node *ofnode; 565 unsigned long base; 566 int i; 567 568 ofnode = mdev->ofdev.dev.of_node; 569 570 if (macio_resource_count(mdev) < 1) 571 return -ENODEV; 572 if (macio_request_resources(mdev, "media-bay")) 573 return -EBUSY; 574 /* Media bay registers are located at the beginning of the 575 * mac-io chip, for now, we trick and align down the first 576 * resource passed in 577 */ 578 base = macio_resource_start(mdev, 0) & 0xffff0000u; 579 regbase = (u32 __iomem *)ioremap(base, 0x100); 580 if (regbase == NULL) { 581 macio_release_resources(mdev); 582 return -ENOMEM; 583 } 584 585 i = media_bay_count++; 586 bay = &media_bays[i]; 587 bay->mdev = mdev; 588 bay->base = regbase; 589 bay->index = i; 590 bay->ops = match->data; 591 bay->sleeping = 0; 592 mutex_init(&bay->lock); 593 594 /* Init HW probing */ 595 if (bay->ops->init) 596 bay->ops->init(bay); 597 598 printk(KERN_INFO "mediabay%d: Registered %s media-bay\n", i, bay->ops->name); 599 600 /* Force an immediate detect */ 601 set_mb_power(bay, 0); 602 msleep(MB_POWER_DELAY); 603 bay->content_id = MB_NO; 604 bay->last_value = bay->ops->content(bay); 605 bay->value_count = msecs_to_jiffies(MB_STABLE_DELAY); 606 bay->state = mb_empty; 607 608 /* Mark us ready by filling our mdev data */ 609 macio_set_drvdata(mdev, bay); 610 611 /* Startup kernel thread */ 612 if (i == 0) 613 kthread_run(media_bay_task, NULL, "media-bay"); 614 615 return 0; 616 617} 618 619static int media_bay_suspend(struct macio_dev *mdev, pm_message_t state) 620{ 621 struct media_bay_info *bay = macio_get_drvdata(mdev); 622 623 if (state.event != mdev->ofdev.dev.power.power_state.event 624 && (state.event & PM_EVENT_SLEEP)) { 625 mutex_lock(&bay->lock); 626 bay->sleeping = 1; 627 set_mb_power(bay, 0); 628 mutex_unlock(&bay->lock); 629 msleep(MB_POLL_DELAY); 630 mdev->ofdev.dev.power.power_state = state; 631 } 632 return 0; 633} 634 635static int media_bay_resume(struct macio_dev *mdev) 636{ 637 struct media_bay_info *bay = macio_get_drvdata(mdev); 638 639 if (mdev->ofdev.dev.power.power_state.event != PM_EVENT_ON) { 640 mdev->ofdev.dev.power.power_state = PMSG_ON; 641 642 /* We re-enable the bay using it's previous content 643 only if it did not change. Note those bozo timings, 644 they seem to help the 3400 get it right. 645 */ 646 /* Force MB power to 0 */ 647 mutex_lock(&bay->lock); 648 set_mb_power(bay, 0); 649 msleep(MB_POWER_DELAY); 650 if (bay->ops->content(bay) != bay->content_id) { 651 printk("mediabay%d: Content changed during sleep...\n", bay->index); 652 mutex_unlock(&bay->lock); 653 return 0; 654 } 655 set_mb_power(bay, 1); 656 bay->last_value = bay->content_id; 657 bay->value_count = msecs_to_jiffies(MB_STABLE_DELAY); 658 bay->timer = msecs_to_jiffies(MB_POWER_DELAY); 659 do { 660 msleep(MB_POLL_DELAY); 661 media_bay_step(bay->index); 662 } while((bay->state != mb_empty) && 663 (bay->state != mb_up)); 664 bay->sleeping = 0; 665 mutex_unlock(&bay->lock); 666 } 667 return 0; 668} 669 670 671/* Definitions of "ops" structures. 672 */ 673static const struct mb_ops ohare_mb_ops = { 674 .name = "Ohare", 675 .content = ohare_mb_content, 676 .power = ohare_mb_power, 677 .setup_bus = ohare_mb_setup_bus, 678 .un_reset = ohare_mb_un_reset, 679 .un_reset_ide = ohare_mb_un_reset_ide, 680}; 681 682static const struct mb_ops heathrow_mb_ops = { 683 .name = "Heathrow", 684 .content = heathrow_mb_content, 685 .power = heathrow_mb_power, 686 .setup_bus = heathrow_mb_setup_bus, 687 .un_reset = heathrow_mb_un_reset, 688 .un_reset_ide = heathrow_mb_un_reset_ide, 689}; 690 691static const struct mb_ops keylargo_mb_ops = { 692 .name = "KeyLargo", 693 .init = keylargo_mb_init, 694 .content = keylargo_mb_content, 695 .power = keylargo_mb_power, 696 .setup_bus = keylargo_mb_setup_bus, 697 .un_reset = keylargo_mb_un_reset, 698 .un_reset_ide = keylargo_mb_un_reset_ide, 699}; 700 701/* 702 * It seems that the bit for the media-bay interrupt in the IRQ_LEVEL 703 * register is always set when there is something in the media bay. 704 * This causes problems for the interrupt code if we attach an interrupt 705 * handler to the media-bay interrupt, because it tends to go into 706 * an infinite loop calling the media bay interrupt handler. 707 * Therefore we do it all by polling the media bay once each tick. 708 */ 709 710static struct of_device_id media_bay_match[] = 711{ 712 { 713 .name = "media-bay", 714 .compatible = "keylargo-media-bay", 715 .data = &keylargo_mb_ops, 716 }, 717 { 718 .name = "media-bay", 719 .compatible = "heathrow-media-bay", 720 .data = &heathrow_mb_ops, 721 }, 722 { 723 .name = "media-bay", 724 .compatible = "ohare-media-bay", 725 .data = &ohare_mb_ops, 726 }, 727 {}, 728}; 729 730static struct macio_driver media_bay_driver = 731{ 732 .driver = { 733 .name = "media-bay", 734 .of_match_table = media_bay_match, 735 }, 736 .probe = media_bay_attach, 737 .suspend = media_bay_suspend, 738 .resume = media_bay_resume 739}; 740 741static int __init media_bay_init(void) 742{ 743 int i; 744 745 for (i=0; i<MAX_BAYS; i++) { 746 memset((char *)&media_bays[i], 0, sizeof(struct media_bay_info)); 747 media_bays[i].content_id = -1; 748 } 749 if (!machine_is(powermac)) 750 return 0; 751 752 macio_register_driver(&media_bay_driver); 753 754 return 0; 755} 756 757device_initcall(media_bay_init); 758