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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

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