2 * Driver for the media bay on the PowerBook 3400 and 2400.
4 * Copyright (C) 1998 Paul Mackerras.
6 * Various evolutions by Benjamin Herrenschmidt & Henry Worth
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.
13 #include <linux/config.h>
14 #include <linux/types.h>
15 #include <linux/errno.h>
16 #include <linux/kernel.h>
17 #include <linux/delay.h>
18 #include <linux/sched.h>
19 #include <linux/timer.h>
20 #include <linux/hdreg.h>
21 #include <linux/stddef.h>
22 #include <linux/init.h>
23 #include <linux/ide.h>
25 #include <asm/pgtable.h>
27 #include <asm/machdep.h>
28 #include <asm/pmac_feature.h>
29 #include <asm/mediabay.h>
30 #include <asm/sections.h>
31 #include <asm/ohare.h>
32 #include <asm/heathrow.h>
33 #include <asm/keylargo.h>
34 #include <linux/adb.h>
35 #include <linux/pmu.h>
39 #define MB_IGNORE_SIGNALS
42 #define MBDBG(fmt, arg...) printk(KERN_INFO fmt , ## arg)
44 #define MBDBG(fmt, arg...) do { } while (0)
47 #define MB_FCR32(bay, r) ((bay)->base + ((r) >> 2))
48 #define MB_FCR8(bay, r) (((volatile u8*)((bay)->base)) + (r))
50 #define MB_IN32(bay,r) (in_le32(MB_FCR32(bay,r)))
51 #define MB_OUT32(bay,r,v) (out_le32(MB_FCR32(bay,r), (v)))
52 #define MB_BIS(bay,r,v) (MB_OUT32((bay), (r), MB_IN32((bay), r) | (v)))
53 #define MB_BIC(bay,r,v) (MB_OUT32((bay), (r), MB_IN32((bay), r) & ~(v)))
54 #define MB_IN8(bay,r) (in_8(MB_FCR8(bay,r)))
55 #define MB_OUT8(bay,r,v) (out_8(MB_FCR8(bay,r), (v)))
57 struct media_bay_info;
61 void (*init)(struct media_bay_info *bay);
62 u8 (*content)(struct media_bay_info *bay);
63 void (*power)(struct media_bay_info *bay, int on_off);
64 int (*setup_bus)(struct media_bay_info *bay, u8 device_id);
65 void (*un_reset)(struct media_bay_info *bay);
66 void (*un_reset_ide)(struct media_bay_info *bay);
69 struct media_bay_info {
76 struct macio_dev *mdev;
81 struct semaphore lock;
82 #ifdef CONFIG_BLK_DEV_IDE
83 unsigned long cd_base;
92 static struct media_bay_info media_bays[MAX_BAYS];
93 int media_bay_count = 0;
95 #ifdef CONFIG_BLK_DEV_IDE
96 /* check the busy bit in the media-bay ide interface
97 (assumes the media-bay contains an ide device) */
98 #define MB_IDE_READY(i) ((readb(media_bays[i].cd_base + 0x70) & 0x80) == 0)
101 /* Note: All delays are not in milliseconds and converted to HZ relative
102 * values by the macro below
104 #define MS_TO_HZ(ms) ((ms * HZ + 999) / 1000)
107 * Wait that number of ms between each step in normal polling mode
109 #define MB_POLL_DELAY 25
112 * Consider the media-bay ID value stable if it is the same for
113 * this number of milliseconds
115 #define MB_STABLE_DELAY 100
117 /* Wait after powering up the media bay this delay in ms
118 * timeout bumped for some powerbooks
120 #define MB_POWER_DELAY 200
123 * Hold the media-bay reset signal true for this many ticks
124 * after a device is inserted before releasing it.
126 #define MB_RESET_DELAY 50
129 * Wait this long after the reset signal is released and before doing
130 * further operations. After this delay, the IDE reset signal is released
131 * too for an IDE device
133 #define MB_SETUP_DELAY 100
136 * Wait this many ticks after an IDE device (e.g. CD-ROM) is inserted
137 * (or until the device is ready) before waiting for busy bit to disappear
139 #define MB_IDE_WAIT 1000
142 * Timeout waiting for busy bit of an IDE device to go down
144 #define MB_IDE_TIMEOUT 5000
147 * Max retries of the full power up/down sequence for an IDE device
149 #define MAX_CD_RETRIES 3
152 * States of a media bay
155 mb_empty = 0, /* Idle */
156 mb_powering_up, /* power bit set, waiting MB_POWER_DELAY */
157 mb_enabling_bay, /* enable bits set, waiting MB_RESET_DELAY */
158 mb_resetting, /* reset bit unset, waiting MB_SETUP_DELAY */
159 mb_ide_resetting, /* IDE reset bit unser, waiting MB_IDE_WAIT */
160 mb_ide_waiting, /* Waiting for BUSY bit to go away until MB_IDE_TIMEOUT */
161 mb_up, /* Media bay full */
162 mb_powering_down /* Powering down (avoid too fast down/up) */
165 #define MB_POWER_SOUND 0x08
166 #define MB_POWER_FLOPPY 0x04
167 #define MB_POWER_ATA 0x02
168 #define MB_POWER_PCI 0x01
169 #define MB_POWER_OFF 0x00
172 * Functions for polling content of media bay
176 ohare_mb_content(struct media_bay_info *bay)
178 return (MB_IN32(bay, OHARE_MBCR) >> 12) & 7;
182 heathrow_mb_content(struct media_bay_info *bay)
184 return (MB_IN32(bay, HEATHROW_MBCR) >> 12) & 7;
188 keylargo_mb_content(struct media_bay_info *bay)
192 new_gpio = MB_IN8(bay, KL_GPIO_MEDIABAY_IRQ) & KEYLARGO_GPIO_INPUT_DATA;
194 bay->cached_gpio = new_gpio;
196 } else if (bay->cached_gpio != new_gpio) {
197 MB_BIS(bay, KEYLARGO_MBCR, KL_MBCR_MB0_ENABLE);
198 (void)MB_IN32(bay, KEYLARGO_MBCR);
200 MB_BIC(bay, KEYLARGO_MBCR, 0x0000000F);
201 (void)MB_IN32(bay, KEYLARGO_MBCR);
203 bay->cached_gpio = new_gpio;
205 return (MB_IN32(bay, KEYLARGO_MBCR) >> 4) & 7;
209 * Functions for powering up/down the bay, puts the bay device
210 * into reset state as well
214 ohare_mb_power(struct media_bay_info* bay, int on_off)
217 /* Power up device, assert it's reset line */
218 MB_BIC(bay, OHARE_FCR, OH_BAY_RESET_N);
219 MB_BIC(bay, OHARE_FCR, OH_BAY_POWER_N);
221 /* Disable all devices */
222 MB_BIC(bay, OHARE_FCR, OH_BAY_DEV_MASK);
223 MB_BIC(bay, OHARE_FCR, OH_FLOPPY_ENABLE);
224 /* Cut power from bay, release reset line */
225 MB_BIS(bay, OHARE_FCR, OH_BAY_POWER_N);
226 MB_BIS(bay, OHARE_FCR, OH_BAY_RESET_N);
227 MB_BIS(bay, OHARE_FCR, OH_IDE1_RESET_N);
229 MB_BIC(bay, OHARE_MBCR, 0x00000F00);
233 heathrow_mb_power(struct media_bay_info* bay, int on_off)
236 /* Power up device, assert it's reset line */
237 MB_BIC(bay, HEATHROW_FCR, HRW_BAY_RESET_N);
238 MB_BIC(bay, HEATHROW_FCR, HRW_BAY_POWER_N);
240 /* Disable all devices */
241 MB_BIC(bay, HEATHROW_FCR, HRW_BAY_DEV_MASK);
242 MB_BIC(bay, HEATHROW_FCR, HRW_SWIM_ENABLE);
243 /* Cut power from bay, release reset line */
244 MB_BIS(bay, HEATHROW_FCR, HRW_BAY_POWER_N);
245 MB_BIS(bay, HEATHROW_FCR, HRW_BAY_RESET_N);
246 MB_BIS(bay, HEATHROW_FCR, HRW_IDE1_RESET_N);
248 MB_BIC(bay, HEATHROW_MBCR, 0x00000F00);
252 keylargo_mb_power(struct media_bay_info* bay, int on_off)
255 /* Power up device, assert it's reset line */
256 MB_BIC(bay, KEYLARGO_MBCR, KL_MBCR_MB0_DEV_RESET);
257 MB_BIC(bay, KEYLARGO_MBCR, KL_MBCR_MB0_DEV_POWER);
259 /* Disable all devices */
260 MB_BIC(bay, KEYLARGO_MBCR, KL_MBCR_MB0_DEV_MASK);
261 MB_BIC(bay, KEYLARGO_FCR1, KL1_EIDE0_ENABLE);
262 /* Cut power from bay, release reset line */
263 MB_BIS(bay, KEYLARGO_MBCR, KL_MBCR_MB0_DEV_POWER);
264 MB_BIS(bay, KEYLARGO_MBCR, KL_MBCR_MB0_DEV_RESET);
265 MB_BIS(bay, KEYLARGO_FCR1, KL1_EIDE0_RESET_N);
267 MB_BIC(bay, KEYLARGO_MBCR, 0x0000000F);
271 * Functions for configuring the media bay for a given type of device,
272 * enable the related busses
276 ohare_mb_setup_bus(struct media_bay_info* bay, u8 device_id)
281 MB_BIS(bay, OHARE_FCR, OH_BAY_FLOPPY_ENABLE);
282 MB_BIS(bay, OHARE_FCR, OH_FLOPPY_ENABLE);
285 MB_BIC(bay, OHARE_FCR, OH_IDE1_RESET_N);
286 MB_BIS(bay, OHARE_FCR, OH_BAY_IDE_ENABLE);
289 MB_BIS(bay, OHARE_FCR, OH_BAY_PCI_ENABLE);
296 heathrow_mb_setup_bus(struct media_bay_info* bay, u8 device_id)
301 MB_BIS(bay, HEATHROW_FCR, HRW_BAY_FLOPPY_ENABLE);
302 MB_BIS(bay, HEATHROW_FCR, HRW_SWIM_ENABLE);
305 MB_BIC(bay, HEATHROW_FCR, HRW_IDE1_RESET_N);
306 MB_BIS(bay, HEATHROW_FCR, HRW_BAY_IDE_ENABLE);
309 MB_BIS(bay, HEATHROW_FCR, HRW_BAY_PCI_ENABLE);
316 keylargo_mb_setup_bus(struct media_bay_info* bay, u8 device_id)
320 MB_BIS(bay, KEYLARGO_MBCR, KL_MBCR_MB0_IDE_ENABLE);
321 MB_BIC(bay, KEYLARGO_FCR1, KL1_EIDE0_RESET_N);
322 MB_BIS(bay, KEYLARGO_FCR1, KL1_EIDE0_ENABLE);
325 MB_BIS(bay, KEYLARGO_MBCR, KL_MBCR_MB0_PCI_ENABLE);
328 MB_BIS(bay, KEYLARGO_MBCR, KL_MBCR_MB0_SOUND_ENABLE);
335 * Functions for tweaking resets
339 ohare_mb_un_reset(struct media_bay_info* bay)
341 MB_BIS(bay, OHARE_FCR, OH_BAY_RESET_N);
344 static void __pmac keylargo_mb_init(struct media_bay_info *bay)
346 MB_BIS(bay, KEYLARGO_MBCR, KL_MBCR_MB0_ENABLE);
349 static void __pmac heathrow_mb_un_reset(struct media_bay_info* bay)
351 MB_BIS(bay, HEATHROW_FCR, HRW_BAY_RESET_N);
354 static void __pmac keylargo_mb_un_reset(struct media_bay_info* bay)
356 MB_BIS(bay, KEYLARGO_MBCR, KL_MBCR_MB0_DEV_RESET);
359 static void __pmac ohare_mb_un_reset_ide(struct media_bay_info* bay)
361 MB_BIS(bay, OHARE_FCR, OH_IDE1_RESET_N);
364 static void __pmac heathrow_mb_un_reset_ide(struct media_bay_info* bay)
366 MB_BIS(bay, HEATHROW_FCR, HRW_IDE1_RESET_N);
369 static void __pmac keylargo_mb_un_reset_ide(struct media_bay_info* bay)
371 MB_BIS(bay, KEYLARGO_FCR1, KL1_EIDE0_RESET_N);
374 static inline void __pmac set_mb_power(struct media_bay_info* bay, int onoff)
376 /* Power up up and assert the bay reset line */
378 bay->ops->power(bay, 1);
379 bay->state = mb_powering_up;
380 MBDBG("mediabay%d: powering up\n", bay->index);
382 /* Make sure everything is powered down & disabled */
383 bay->ops->power(bay, 0);
384 bay->state = mb_powering_down;
385 MBDBG("mediabay%d: powering down\n", bay->index);
387 bay->timer = MS_TO_HZ(MB_POWER_DELAY);
390 static void __pmac poll_media_bay(struct media_bay_info* bay)
392 int id = bay->ops->content(bay);
394 if (id == bay->last_value) {
395 if (id != bay->content_id) {
396 bay->value_count += MS_TO_HZ(MB_POLL_DELAY);
397 if (bay->value_count >= MS_TO_HZ(MB_STABLE_DELAY)) {
398 /* If the device type changes without going thru
399 * "MB_NO", we force a pass by "MB_NO" to make sure
400 * things are properly reset
402 if ((id != MB_NO) && (bay->content_id != MB_NO)) {
404 MBDBG("mediabay%d: forcing MB_NO\n", bay->index);
406 MBDBG("mediabay%d: switching to %d\n", bay->index, id);
407 set_mb_power(bay, id != MB_NO);
408 bay->content_id = id;
410 #ifdef CONFIG_BLK_DEV_IDE
413 printk(KERN_INFO "media bay %d is empty\n", bay->index);
418 bay->last_value = id;
419 bay->value_count = 0;
423 int __pmac check_media_bay(struct device_node *which_bay, int what)
425 #ifdef CONFIG_BLK_DEV_IDE
428 for (i=0; i<media_bay_count; i++)
429 if (media_bays[i].mdev && which_bay == media_bays[i].mdev->ofdev.node) {
430 if ((what == media_bays[i].content_id) && media_bays[i].state == mb_up)
432 media_bays[i].cd_index = -1;
435 #endif /* CONFIG_BLK_DEV_IDE */
439 int __pmac check_media_bay_by_base(unsigned long base, int what)
441 #ifdef CONFIG_BLK_DEV_IDE
444 for (i=0; i<media_bay_count; i++)
445 if (media_bays[i].mdev && base == media_bays[i].cd_base) {
446 if ((what == media_bays[i].content_id) && media_bays[i].state == mb_up)
448 media_bays[i].cd_index = -1;
456 int __pmac media_bay_set_ide_infos(struct device_node* which_bay, unsigned long base,
459 #ifdef CONFIG_BLK_DEV_IDE
462 for (i=0; i<media_bay_count; i++) {
463 struct media_bay_info* bay = &media_bays[i];
465 if (bay->mdev && which_bay == bay->mdev->ofdev.node) {
473 if ((MB_CD != bay->content_id) || bay->state != mb_up) {
477 printk(KERN_DEBUG "Registered ide%d for media bay %d\n", index, i);
479 if (MB_IDE_READY(i)) {
480 bay->cd_index = index;
486 printk(KERN_DEBUG "Timeount waiting IDE in bay %d\n", i);
491 #endif /* CONFIG_BLK_DEV_IDE */
496 static void __pmac media_bay_step(int i)
498 struct media_bay_info* bay = &media_bays[i];
500 /* We don't poll when powering down */
501 if (bay->state != mb_powering_down)
504 /* If timer expired or polling IDE busy, run state machine */
505 if ((bay->state != mb_ide_waiting) && (bay->timer != 0)) {
506 bay->timer -= MS_TO_HZ(MB_POLL_DELAY);
514 if (bay->ops->setup_bus(bay, bay->last_value) < 0) {
515 MBDBG("mediabay%d: device not supported (kind:%d)\n", i, bay->content_id);
516 set_mb_power(bay, 0);
519 bay->timer = MS_TO_HZ(MB_RESET_DELAY);
520 bay->state = mb_enabling_bay;
521 MBDBG("mediabay%d: enabling (kind:%d)\n", i, bay->content_id);
523 case mb_enabling_bay:
524 bay->ops->un_reset(bay);
525 bay->timer = MS_TO_HZ(MB_SETUP_DELAY);
526 bay->state = mb_resetting;
527 MBDBG("mediabay%d: waiting reset (kind:%d)\n", i, bay->content_id);
531 if (bay->content_id != MB_CD) {
532 MBDBG("mediabay%d: bay is up (kind:%d)\n", i, bay->content_id);
536 #ifdef CONFIG_BLK_DEV_IDE
537 MBDBG("mediabay%d: waiting IDE reset (kind:%d)\n", i, bay->content_id);
538 bay->ops->un_reset_ide(bay);
539 bay->timer = MS_TO_HZ(MB_IDE_WAIT);
540 bay->state = mb_ide_resetting;
542 printk(KERN_DEBUG "media-bay %d is ide (not compiled in kernel)\n", i);
543 set_mb_power(bay, 0);
544 #endif /* CONFIG_BLK_DEV_IDE */
547 #ifdef CONFIG_BLK_DEV_IDE
548 case mb_ide_resetting:
549 bay->timer = MS_TO_HZ(MB_IDE_TIMEOUT);
550 bay->state = mb_ide_waiting;
551 MBDBG("mediabay%d: waiting IDE ready (kind:%d)\n", i, bay->content_id);
555 if (bay->cd_base == 0) {
558 MBDBG("mediabay%d: up before IDE init\n", i);
560 } else if (MB_IDE_READY(i)) {
563 if (bay->cd_index < 0) {
566 printk("mediabay %d, registering IDE...\n", i);
568 ide_init_hwif_ports(&hw, (unsigned long) bay->cd_base, (unsigned long) 0, NULL);
569 hw.irq = bay->cd_irq;
570 hw.chipset = ide_pmac;
571 bay->cd_index = ide_register_hw(&hw, NULL);
574 if (bay->cd_index == -1) {
575 /* We eventually do a retry */
577 printk("IDE register error\n");
578 set_mb_power(bay, 0);
580 printk(KERN_DEBUG "media-bay %d is ide%d\n", i, bay->cd_index);
581 MBDBG("mediabay %d IDE ready\n", i);
584 } else if (bay->timer > 0)
585 bay->timer -= MS_TO_HZ(MB_POLL_DELAY);
586 if (bay->timer <= 0) {
587 printk("\nIDE Timeout in bay %d !, IDE state is: 0x%02x\n",
588 i, readb(bay->cd_base + 0x70));
589 MBDBG("mediabay%d: nIDE Timeout !\n", i);
590 set_mb_power(bay, 0);
594 #endif /* CONFIG_BLK_DEV_IDE */
596 case mb_powering_down:
597 bay->state = mb_empty;
598 #ifdef CONFIG_BLK_DEV_IDE
599 if (bay->cd_index >= 0) {
600 printk(KERN_DEBUG "Unregistering mb %d ide, index:%d\n", i,
602 ide_unregister(bay->cd_index);
606 if (bay->cd_retry > MAX_CD_RETRIES) {
607 /* Should add an error sound (sort of beep in dmasound) */
608 printk("\nmedia-bay %d, IDE device badly inserted or unrecognised\n", i);
610 /* Force a new power down/up sequence */
611 bay->content_id = MB_NO;
614 #endif /* CONFIG_BLK_DEV_IDE */
615 MBDBG("mediabay%d: end of power down\n", i);
621 * This procedure runs as a kernel thread to poll the media bay
622 * once each tick and register and unregister the IDE interface
623 * with the IDE driver. It needs to be a thread because
624 * ide_register can't be called from interrupt context.
626 static int __pmac media_bay_task(void *x)
630 strcpy(current->comm, "media-bay");
631 #ifdef MB_IGNORE_SIGNALS
632 sigfillset(¤t->blocked);
636 for (i = 0; i < media_bay_count; ++i) {
637 down(&media_bays[i].lock);
638 if (!media_bays[i].sleeping)
640 up(&media_bays[i].lock);
643 current->state = TASK_INTERRUPTIBLE;
644 schedule_timeout(MS_TO_HZ(MB_POLL_DELAY));
645 if (signal_pending(current))
650 static int __devinit media_bay_attach(struct macio_dev *mdev, const struct of_match *match)
652 struct media_bay_info* bay;
653 volatile u32 *regbase;
654 struct device_node *ofnode;
657 ofnode = mdev->ofdev.node;
659 if (macio_resource_count(mdev) < 1)
661 if (macio_request_resources(mdev, "media-bay"))
663 /* Media bay registers are located at the beginning of the
664 * mac-io chip, we get the parent address for now (hrm...)
666 regbase = (volatile u32 *)ioremap(ofnode->parent->addrs[0].address, 0x100);
667 if (regbase == NULL) {
668 macio_release_resources(mdev);
672 i = media_bay_count++;
673 bay = &media_bays[i];
677 bay->ops = match->data;
679 init_MUTEX(&bay->lock);
681 /* Init HW probing */
685 printk(KERN_INFO "mediabay%d: Registered %s media-bay\n", i, bay->ops->name);
687 /* Force an immediate detect */
688 set_mb_power(bay, 0);
689 set_current_state(TASK_UNINTERRUPTIBLE);
690 schedule_timeout(MS_TO_HZ(MB_POWER_DELAY));
691 bay->content_id = MB_NO;
692 bay->last_value = bay->ops->content(bay);
693 bay->value_count = MS_TO_HZ(MB_STABLE_DELAY);
694 bay->state = mb_empty;
696 set_current_state(TASK_UNINTERRUPTIBLE);
697 schedule_timeout(MS_TO_HZ(MB_POLL_DELAY));
699 } while((bay->state != mb_empty) &&
700 (bay->state != mb_up));
702 /* Mark us ready by filling our mdev data */
703 macio_set_drvdata(mdev, bay);
705 /* Startup kernel thread */
707 kernel_thread(media_bay_task, NULL, CLONE_KERNEL);
713 static int __pmac media_bay_suspend(struct macio_dev *mdev, u32 state)
715 struct media_bay_info *bay = macio_get_drvdata(mdev);
717 if (state != mdev->ofdev.dev.power_state && state >= 2) {
720 set_mb_power(bay, 0);
722 set_current_state(TASK_UNINTERRUPTIBLE);
723 schedule_timeout(MS_TO_HZ(MB_POLL_DELAY));
724 mdev->ofdev.dev.power_state = state;
729 static int __pmac media_bay_resume(struct macio_dev *mdev)
731 struct media_bay_info *bay = macio_get_drvdata(mdev);
733 if (mdev->ofdev.dev.power_state != 0) {
734 mdev->ofdev.dev.power_state = 0;
736 /* We re-enable the bay using it's previous content
737 only if it did not change. Note those bozo timings,
738 they seem to help the 3400 get it right.
740 /* Force MB power to 0 */
742 set_mb_power(bay, 0);
743 set_current_state(TASK_UNINTERRUPTIBLE);
744 schedule_timeout(MS_TO_HZ(MB_POWER_DELAY));
745 if (bay->ops->content(bay) != bay->content_id) {
746 printk("mediabay%d: content changed during sleep...\n", bay->index);
750 set_mb_power(bay, 1);
751 bay->last_value = bay->content_id;
752 bay->value_count = MS_TO_HZ(MB_STABLE_DELAY);
753 bay->timer = MS_TO_HZ(MB_POWER_DELAY);
754 #ifdef CONFIG_BLK_DEV_IDE
758 set_current_state(TASK_UNINTERRUPTIBLE);
759 schedule_timeout(MS_TO_HZ(MB_POLL_DELAY));
760 media_bay_step(bay->index);
761 } while((bay->state != mb_empty) &&
762 (bay->state != mb_up));
770 /* Definitions of "ops" structures.
772 static struct mb_ops ohare_mb_ops __pmacdata = {
774 .content = ohare_mb_content,
775 .power = ohare_mb_power,
776 .setup_bus = ohare_mb_setup_bus,
777 .un_reset = ohare_mb_un_reset,
778 .un_reset_ide = ohare_mb_un_reset_ide,
781 static struct mb_ops heathrow_mb_ops __pmacdata = {
783 .content = heathrow_mb_content,
784 .power = heathrow_mb_power,
785 .setup_bus = heathrow_mb_setup_bus,
786 .un_reset = heathrow_mb_un_reset,
787 .un_reset_ide = heathrow_mb_un_reset_ide,
790 static struct mb_ops keylargo_mb_ops __pmacdata = {
792 .init = keylargo_mb_init,
793 .content = keylargo_mb_content,
794 .power = keylargo_mb_power,
795 .setup_bus = keylargo_mb_setup_bus,
796 .un_reset = keylargo_mb_un_reset,
797 .un_reset_ide = keylargo_mb_un_reset_ide,
801 * It seems that the bit for the media-bay interrupt in the IRQ_LEVEL
802 * register is always set when there is something in the media bay.
803 * This causes problems for the interrupt code if we attach an interrupt
804 * handler to the media-bay interrupt, because it tends to go into
805 * an infinite loop calling the media bay interrupt handler.
806 * Therefore we do it all by polling the media bay once each tick.
809 static struct of_match media_bay_match[] =
813 .type = OF_ANY_MATCH,
814 .compatible = "keylargo-media-bay",
815 .data = &keylargo_mb_ops,
819 .type = OF_ANY_MATCH,
820 .compatible = "heathrow-media-bay",
821 .data = &heathrow_mb_ops,
825 .type = OF_ANY_MATCH,
826 .compatible = "ohare-media-bay",
827 .data = &ohare_mb_ops,
832 static struct macio_driver media_bay_driver =
835 .match_table = media_bay_match,
836 .probe = media_bay_attach,
837 .suspend = media_bay_suspend,
838 .resume = media_bay_resume
841 static int __init media_bay_init(void)
845 for (i=0; i<MAX_BAYS; i++) {
846 memset((char *)&media_bays[i], 0, sizeof(struct media_bay_info));
847 media_bays[i].content_id = -1;
848 #ifdef CONFIG_BLK_DEV_IDE
849 media_bays[i].cd_index = -1;
852 if (_machine != _MACH_Pmac)
855 macio_register_driver(&media_bay_driver);
860 device_initcall(media_bay_init);