1 // SPDX-License-Identifier: GPL-2.0-or-later
32 #define MB_FCR32(bay, r)	((bay)->base + ((r) >> 2))
33 #define MB_FCR8(bay, r)		(((volatile u8 __iomem *)((bay)->base)) + (r))
76  * Wait that number of ms between each step in normal polling mode
81  * Consider the media-bay ID value stable if it is the same for
86 /* Wait after powering up the media bay this delay in ms
92  * Hold the media-bay reset signal true for this many ticks
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
105  * Wait this many ticks after an IDE device (e.g. CD-ROM) is inserted
117 	mb_resetting,		/* reset bit unset, waiting MB_SETUP_DELAY */
118 	mb_ide_resetting,	/* IDE reset bit unser, waiting MB_IDE_WAIT */
152 		bay->cached_gpio = new_gpio;  in keylargo_mb_content()
154 	} else if (bay->cached_gpio != new_gpio) {  in keylargo_mb_content()
161 		bay->cached_gpio = new_gpio;  in keylargo_mb_content()
168  * into reset state as well
175 		/* Power up device, assert it's reset line */  in ohare_mb_power()
182 		/* Cut power from bay, release reset line */  in ohare_mb_power()
194 		/* Power up device, assert it's reset line */  in heathrow_mb_power()
201 		/* Cut power from bay, release reset line */  in heathrow_mb_power()
213 		/* Power up device, assert it's reset line */  in keylargo_mb_power()
220 		/* Cut power from bay, release reset line */  in keylargo_mb_power()
250 	return -ENODEV;  in ohare_mb_setup_bus()
270 	return -ENODEV;  in heathrow_mb_setup_bus()
289 	return -ENODEV;  in keylargo_mb_setup_bus()
334 	/* Power up up and assert the bay reset line */  in set_mb_power()
336 		bay->ops->power(bay, 1);  in set_mb_power()
337 		bay->state = mb_powering_up;  in set_mb_power()
338 		pr_debug("mediabay%d: powering up\n", bay->index);  in set_mb_power()
341 		bay->ops->power(bay, 0);  in set_mb_power()
342 		bay->state = mb_powering_down;  in set_mb_power()
343 		pr_debug("mediabay%d: powering down\n", bay->index);  in set_mb_power()
345 	bay->timer = msecs_to_jiffies(MB_POWER_DELAY);  in set_mb_power()
350 	int id = bay->ops->content(bay);  in poll_media_bay()
361 	if (id != bay->last_value) {  in poll_media_bay()
362 		bay->last_value = id;  in poll_media_bay()
363 		bay->value_count = 0;  in poll_media_bay()
366 	if (id == bay->content_id)  in poll_media_bay()
369 	bay->value_count += msecs_to_jiffies(MB_POLL_DELAY);  in poll_media_bay()
370 	if (bay->value_count >= msecs_to_jiffies(MB_STABLE_DELAY)) {  in poll_media_bay()
373 		 * things are properly reset  in poll_media_bay()
375 		if ((id != MB_NO) && (bay->content_id != MB_NO)) {  in poll_media_bay()
377 			pr_debug("mediabay%d: forcing MB_NO\n", bay->index);  in poll_media_bay()
379 		pr_debug("mediabay%d: switching to %d\n", bay->index, id);  in poll_media_bay()
381 		bay->content_id = id;  in poll_media_bay()
383 			printk(KERN_INFO "mediabay%d: Bay is now empty\n", bay->index);  in poll_media_bay()
386 			       bay->index, mb_content_types[id]);  in poll_media_bay()
406 	id = bay->content_id;  in check_media_bay()
407 	if (bay->state != mb_up)  in check_media_bay()
424 	mutex_lock(&bay->lock);  in lock_media_bay()
425 	bay->user_lock = 1;  in lock_media_bay()
438 	if (bay->user_lock) {  in unlock_media_bay()
439 		bay->user_lock = 0;  in unlock_media_bay()
440 		mutex_unlock(&bay->lock);  in unlock_media_bay()
452 	if (dev->bus != &macio_bus_type)  in mb_broadcast_hotplug()
455 	state = bay->state == mb_up ? bay->content_id : MB_NO;  in mb_broadcast_hotplug()
459 	drv = to_macio_driver(dev->driver);  in mb_broadcast_hotplug()
460 	if (dev->driver && drv->mediabay_event)  in mb_broadcast_hotplug()
461 		drv->mediabay_event(mdev, state);  in mb_broadcast_hotplug()
470 	if (bay->state != mb_powering_down)  in media_bay_step()
474 	if (bay->timer != 0) {  in media_bay_step()
475 		bay->timer -= msecs_to_jiffies(MB_POLL_DELAY);  in media_bay_step()
476 		if (bay->timer > 0)  in media_bay_step()
478 		bay->timer = 0;  in media_bay_step()
481 	switch(bay->state) {  in media_bay_step()
483 	    	if (bay->ops->setup_bus(bay, bay->last_value) < 0) {  in media_bay_step()
485 				 i, bay->content_id);  in media_bay_step()
489 	    	bay->timer = msecs_to_jiffies(MB_RESET_DELAY);  in media_bay_step()
490 	    	bay->state = mb_enabling_bay;  in media_bay_step()
491 		pr_debug("mediabay%d: enabling (kind:%d)\n", i, bay->content_id);  in media_bay_step()
494 		bay->ops->un_reset(bay);  in media_bay_step()
495 	    	bay->timer = msecs_to_jiffies(MB_SETUP_DELAY);  in media_bay_step()
496 	    	bay->state = mb_resetting;  in media_bay_step()
497 		pr_debug("mediabay%d: releasing bay reset (kind:%d)\n",  in media_bay_step()
498 			 i, bay->content_id);  in media_bay_step()
501 		if (bay->content_id != MB_CD) {  in media_bay_step()
503 				 bay->content_id);  in media_bay_step()
504 			bay->state = mb_up;  in media_bay_step()
505 			device_for_each_child(&bay->mdev->ofdev.dev,  in media_bay_step()
509 		pr_debug("mediabay%d: releasing ATA reset (kind:%d)\n",  in media_bay_step()
510 			 i, bay->content_id);  in media_bay_step()
511 		bay->ops->un_reset_ide(bay);  in media_bay_step()
512 	    	bay->timer = msecs_to_jiffies(MB_IDE_WAIT);  in media_bay_step()
513 	    	bay->state = mb_ide_resetting;  in media_bay_step()
517 		pr_debug("mediabay%d: bay is up (kind:%d)\n", i, bay->content_id);  in media_bay_step()
518 		bay->state = mb_up;  in media_bay_step()
519 		device_for_each_child(&bay->mdev->ofdev.dev,  in media_bay_step()
524 	    	bay->state = mb_empty;  in media_bay_step()
525 		device_for_each_child(&bay->mdev->ofdev.dev,  in media_bay_step()
564 	ofnode = mdev->ofdev.dev.of_node;  in media_bay_attach()
567 		return -ENODEV;  in media_bay_attach()
568 	if (macio_request_resources(mdev, "media-bay"))  in media_bay_attach()
569 		return -EBUSY;  in media_bay_attach()
571          * mac-io chip, for now, we trick and align down the first  in media_bay_attach()
578 		return -ENOMEM;  in media_bay_attach()
583 	bay->mdev = mdev;  in media_bay_attach()
584 	bay->base = regbase;  in media_bay_attach()
585 	bay->index = i;  in media_bay_attach()
586 	bay->ops = match->data;  in media_bay_attach()
587 	bay->sleeping = 0;  in media_bay_attach()
588 	mutex_init(&bay->lock);  in media_bay_attach()
591 	if (bay->ops->init)  in media_bay_attach()
592 		bay->ops->init(bay);  in media_bay_attach()
594 	printk(KERN_INFO "mediabay%d: Registered %s media-bay\n", i, bay->ops->name);  in media_bay_attach()
599 	bay->content_id = MB_NO;  in media_bay_attach()
600 	bay->last_value = bay->ops->content(bay);  in media_bay_attach()
601 	bay->value_count = msecs_to_jiffies(MB_STABLE_DELAY);  in media_bay_attach()
602 	bay->state = mb_empty;  in media_bay_attach()
609 		kthread_run(media_bay_task, NULL, "media-bay");  in media_bay_attach()
619 	if (state.event != mdev->ofdev.dev.power.power_state.event  in media_bay_suspend()
621 		mutex_lock(&bay->lock);  in media_bay_suspend()
622 		bay->sleeping = 1;  in media_bay_suspend()
624 		mutex_unlock(&bay->lock);  in media_bay_suspend()
626 		mdev->ofdev.dev.power.power_state = state;  in media_bay_suspend()
635 	if (mdev->ofdev.dev.power.power_state.event != PM_EVENT_ON) {  in media_bay_resume()
636 		mdev->ofdev.dev.power.power_state = PMSG_ON;  in media_bay_resume()
638 	       	/* We re-enable the bay using it's previous content  in media_bay_resume()
643 		mutex_lock(&bay->lock);  in media_bay_resume()
646 	       	if (bay->ops->content(bay) != bay->content_id) {  in media_bay_resume()
647 			printk("mediabay%d: Content changed during sleep...\n", bay->index);  in media_bay_resume()
648 			mutex_unlock(&bay->lock);  in media_bay_resume()
652 	       	bay->last_value = bay->content_id;  in media_bay_resume()
653 	       	bay->value_count = msecs_to_jiffies(MB_STABLE_DELAY);  in media_bay_resume()
654 	       	bay->timer = msecs_to_jiffies(MB_POWER_DELAY);  in media_bay_resume()
657 	       		media_bay_step(bay->index);  in media_bay_resume()
658 	       	} while((bay->state != mb_empty) &&  in media_bay_resume()
659 	       		(bay->state != mb_up));  in media_bay_resume()
660 		bay->sleeping = 0;  in media_bay_resume()
661 		mutex_unlock(&bay->lock);  in media_bay_resume()
698  * It seems that the bit for the media-bay interrupt in the IRQ_LEVEL
701  * handler to the media-bay interrupt, because it tends to go into
709 	.name		= "media-bay",
710 	.compatible	= "keylargo-media-bay",
714 	.name		= "media-bay",
715 	.compatible	= "heathrow-media-bay",
719 	.name		= "media-bay",
720 	.compatible	= "ohare-media-bay",
729 		.name		= "media-bay",
743 		media_bays[i].content_id	= -1;  in media_bay_init()