diff --git a/drivers/macintosh/macio_asic.c b/drivers/macintosh/macio_asic.c
new file mode 100644
index 0000000..3a609ec
--- /dev/null
+++ b/drivers/macintosh/macio_asic.c
@@ -0,0 +1,636 @@
+/*
+ * Bus & driver management routines for devices within
+ * a MacIO ASIC. Interface to new driver model mostly
+ * stolen from the PCI version.
+ * 
+ * TODO:
+ * 
+ *  - Don't probe below media bay by default, but instead provide
+ *    some hooks for media bay to dynamically add/remove it's own
+ *    sub-devices.
+ */
+ 
+#include <linux/config.h>
+#include <linux/string.h>
+#include <linux/kernel.h>
+#include <linux/pci.h>
+#include <linux/pci_ids.h>
+#include <linux/init.h>
+#include <linux/module.h>
+#include <asm/machdep.h>
+#include <asm/macio.h>
+#include <asm/pmac_feature.h>
+#include <asm/prom.h>
+#include <asm/pci-bridge.h>
+
+#undef DEBUG
+
+#define MAX_NODE_NAME_SIZE (BUS_ID_SIZE - 12)
+
+static struct macio_chip      *macio_on_hold;
+
+static int macio_bus_match(struct device *dev, struct device_driver *drv) 
+{
+	struct macio_dev * macio_dev = to_macio_device(dev);
+	struct macio_driver * macio_drv = to_macio_driver(drv);
+	const struct of_match * matches = macio_drv->match_table;
+
+	if (!matches) 
+		return 0;
+
+	return of_match_device(matches, &macio_dev->ofdev) != NULL;
+}
+
+struct macio_dev *macio_dev_get(struct macio_dev *dev)
+{
+	struct device *tmp;
+
+	if (!dev)
+		return NULL;
+	tmp = get_device(&dev->ofdev.dev);
+	if (tmp)
+		return to_macio_device(tmp);
+	else
+		return NULL;
+}
+
+void macio_dev_put(struct macio_dev *dev)
+{
+	if (dev)
+		put_device(&dev->ofdev.dev);
+}
+
+
+static int macio_device_probe(struct device *dev)
+{
+	int error = -ENODEV;
+	struct macio_driver *drv;
+	struct macio_dev *macio_dev;
+	const struct of_match *match;
+
+	drv = to_macio_driver(dev->driver);
+	macio_dev = to_macio_device(dev);
+
+	if (!drv->probe)
+		return error;
+
+	macio_dev_get(macio_dev);
+
+	match = of_match_device(drv->match_table, &macio_dev->ofdev);
+	if (match)
+		error = drv->probe(macio_dev, match);
+	if (error)
+		macio_dev_put(macio_dev);
+
+	return error;
+}
+
+static int macio_device_remove(struct device *dev)
+{
+	struct macio_dev * macio_dev = to_macio_device(dev);
+	struct macio_driver * drv = to_macio_driver(dev->driver);
+
+	if (dev->driver && drv->remove)
+		drv->remove(macio_dev);
+	macio_dev_put(macio_dev);
+
+	return 0;
+}
+
+static void macio_device_shutdown(struct device *dev)
+{
+	struct macio_dev * macio_dev = to_macio_device(dev);
+	struct macio_driver * drv = to_macio_driver(dev->driver);
+
+	if (dev->driver && drv->shutdown)
+		drv->shutdown(macio_dev);
+}
+
+static int macio_device_suspend(struct device *dev, u32 state)
+{
+	struct macio_dev * macio_dev = to_macio_device(dev);
+	struct macio_driver * drv = to_macio_driver(dev->driver);
+
+	if (dev->driver && drv->suspend)
+		return drv->suspend(macio_dev, state);
+	return 0;
+}
+
+static int macio_device_resume(struct device * dev)
+{
+	struct macio_dev * macio_dev = to_macio_device(dev);
+	struct macio_driver * drv = to_macio_driver(dev->driver);
+
+	if (dev->driver && drv->resume)
+		return drv->resume(macio_dev);
+	return 0;
+}
+
+struct bus_type macio_bus_type = {
+       .name	= "macio",
+       .match	= macio_bus_match,
+       .suspend	= macio_device_suspend,
+       .resume	= macio_device_resume,
+};
+
+static int __init macio_bus_driver_init(void)
+{
+	return bus_register(&macio_bus_type);
+}
+
+postcore_initcall(macio_bus_driver_init);
+
+
+/**
+ * macio_release_dev - free a macio device structure when all users of it are finished.
+ * @dev: device that's been disconnected
+ *
+ * Will be called only by the device core when all users of this macio device are
+ * done. This currently means never as we don't hot remove any macio device yet,
+ * though that will happen with mediabay based devices in a later implementation.
+ */
+static void macio_release_dev(struct device *dev)
+{
+	struct macio_dev *mdev;
+
+        mdev = to_macio_device(dev);
+	kfree(mdev);
+}
+
+/**
+ * macio_resource_quirks - tweak or skip some resources for a device
+ * @np: pointer to the device node
+ * @res: resulting resource
+ * @index: index of resource in node
+ *
+ * If this routine returns non-null, then the resource is completely
+ * skipped.
+ */
+static int macio_resource_quirks(struct device_node *np, struct resource *res, int index)
+{
+	if (res->flags & IORESOURCE_MEM) {
+		/* Grand Central has too large resource 0 on some machines */
+		if (index == 0 && !strcmp(np->name, "gc")) {
+			np->addrs[0].size = 0x20000;
+			res->end = res->start + 0x1ffff;
+		}
+		/* Airport has bogus resource 2 */
+		if (index >= 2 && !strcmp(np->name, "radio"))
+			return 1;
+		/* DBDMAs may have bogus sizes */
+		if ((res->start & 0x0001f000) == 0x00008000) {
+			np->addrs[index].size = 0x100;
+			res->end = res->start + 0xff;
+		}
+		/* ESCC parent eats child resources. We could have added a level of hierarchy,
+		 * but I don't really feel the need for it */
+		if (!strcmp(np->name, "escc"))
+			return 1;
+		/* ESCC has bogus resources >= 3 */
+		if (index >= 3 && !(strcmp(np->name, "ch-a") && strcmp(np->name, "ch-b")))
+			return 1;
+		/* Media bay has too many resources, keep only first one */
+		if (index > 0 && !strcmp(np->name, "media-bay"))
+			return 1;
+		/* Some older IDE resources have bogus sizes */
+		if (!(strcmp(np->name, "IDE") && strcmp(np->name, "ATA") &&
+		      strcmp(np->type, "ide") && strcmp(np->type, "ata"))) {
+			if (index == 0 && np->addrs[0].size > 0x1000) {
+				np->addrs[0].size = 0x1000;
+				res->end = res->start + 0xfff;
+			}
+			if (index == 1 && np->addrs[1].size > 0x100) {
+				np->addrs[1].size = 0x100;
+				res->end = res->start + 0xff;
+			}
+		}
+	}
+	return 0;
+}
+
+
+/**
+ * macio_add_one_device - Add one device from OF node to the device tree
+ * @chip: pointer to the macio_chip holding the device
+ * @np: pointer to the device node in the OF tree
+ * @in_bay: set to 1 if device is part of a media-bay
+ *
+ * When media-bay is changed to hotswap drivers, this function will
+ * be exposed to the bay driver some way...
+ */
+static struct macio_dev * macio_add_one_device(struct macio_chip *chip, struct device *parent,
+					       struct device_node *np, struct macio_dev *in_bay,
+					       struct resource *parent_res)
+{
+	struct macio_dev *dev;
+	int i, j;
+	u32 *reg;
+	
+	if (np == NULL)
+		return NULL;
+
+	dev = kmalloc(sizeof(*dev), GFP_KERNEL);
+	if (!dev)
+		return NULL;
+	memset(dev, 0, sizeof(*dev));
+
+	dev->bus = &chip->lbus;
+	dev->media_bay = in_bay;
+	dev->ofdev.node = np;
+	dev->ofdev.dma_mask = 0xffffffffUL;
+	dev->ofdev.dev.dma_mask = &dev->ofdev.dma_mask;
+	dev->ofdev.dev.parent = parent;
+	dev->ofdev.dev.bus = &macio_bus_type;
+	dev->ofdev.dev.release = macio_release_dev;
+
+#ifdef DEBUG
+	printk("preparing mdev @%p, ofdev @%p, dev @%p, kobj @%p\n",
+	       dev, &dev->ofdev, &dev->ofdev.dev, &dev->ofdev.dev.kobj);
+#endif
+
+	/* MacIO itself has a different reg, we use it's PCI base */
+	if (np == chip->of_node) {
+		sprintf(dev->ofdev.dev.bus_id, "%1d.%08lx:%.*s", chip->lbus.index,
+#ifdef CONFIG_PCI
+			pci_resource_start(chip->lbus.pdev, 0),
+#else
+			0, /* NuBus may want to do something better here */
+#endif
+			MAX_NODE_NAME_SIZE, np->name);
+	} else {
+		reg = (u32 *)get_property(np, "reg", NULL);
+		sprintf(dev->ofdev.dev.bus_id, "%1d.%08x:%.*s", chip->lbus.index,
+			reg ? *reg : 0, MAX_NODE_NAME_SIZE, np->name);
+	}
+
+	/* For now, we use pre-parsed entries in the device-tree for
+	 * interrupt routing and addresses, but we should change that
+	 * to dynamically parsed entries and so get rid of most of the
+	 * clutter in struct device_node
+	 */
+	for (i = j = 0; i < np->n_intrs; i++) {
+		struct resource *res = &dev->interrupt[j];
+
+		if (j >= MACIO_DEV_COUNT_IRQS)
+			break;
+		res->start = np->intrs[i].line;
+		res->flags = IORESOURCE_IO;
+		if (np->intrs[j].sense)
+			res->flags |= IORESOURCE_IRQ_LOWLEVEL;
+		else
+			res->flags |= IORESOURCE_IRQ_HIGHEDGE;
+		res->name = dev->ofdev.dev.bus_id;
+		if (macio_resource_quirks(np, res, i))
+			memset(res, 0, sizeof(struct resource));
+		else
+			j++;
+	}
+	dev->n_interrupts = j;
+	for (i = j = 0; i < np->n_addrs; i++) {
+		struct resource *res = &dev->resource[j];
+		
+		if (j >= MACIO_DEV_COUNT_RESOURCES)
+			break;
+		res->start = np->addrs[i].address;
+		res->end = np->addrs[i].address + np->addrs[i].size - 1;
+		res->flags = IORESOURCE_MEM;
+		res->name = dev->ofdev.dev.bus_id;
+		if (macio_resource_quirks(np, res, i))
+			memset(res, 0, sizeof(struct resource));
+		else {
+			j++;
+			/* Currently, we consider failure as harmless, this may
+			 * change in the future, once I've found all the device
+			 * tree bugs in older machines & worked around them
+			 */
+			if (insert_resource(parent_res, res))
+       				printk(KERN_WARNING "Can't request resource %d for MacIO"
+				       " device %s\n", i, dev->ofdev.dev.bus_id);
+		}
+	}
+	dev->n_resources = j;
+
+	if (of_device_register(&dev->ofdev) != 0) {
+		printk(KERN_DEBUG"macio: device registration error for %s!\n",
+		       dev->ofdev.dev.bus_id);
+		kfree(dev);
+		return NULL;
+	}
+
+	return dev;
+}
+
+static int macio_skip_device(struct device_node *np)
+{
+	if (strncmp(np->name, "battery", 7) == 0)
+		return 1;
+	if (strncmp(np->name, "escc-legacy", 11) == 0)
+		return 1;
+	return 0;
+}
+
+/**
+ * macio_pci_add_devices - Adds sub-devices of mac-io to the device tree
+ * @chip: pointer to the macio_chip holding the devices
+ * 
+ * This function will do the job of extracting devices from the
+ * Open Firmware device tree, build macio_dev structures and add
+ * them to the Linux device tree.
+ * 
+ * For now, childs of media-bay are added now as well. This will
+ * change rsn though.
+ */
+static void macio_pci_add_devices(struct macio_chip *chip)
+{
+	struct device_node *np, *pnode;
+	struct macio_dev *rdev, *mdev, *mbdev = NULL, *sdev = NULL;
+	struct device *parent = NULL;
+	struct resource *root_res = &iomem_resource;
+	
+	/* Add a node for the macio bus itself */
+#ifdef CONFIG_PCI
+	if (chip->lbus.pdev) {
+		parent = &chip->lbus.pdev->dev;
+		root_res = &chip->lbus.pdev->resource[0];
+	}
+#endif
+	pnode = of_node_get(chip->of_node);
+	if (pnode == NULL)
+		return;
+
+	/* Add macio itself to hierarchy */
+	rdev = macio_add_one_device(chip, parent, pnode, NULL, root_res);
+	if (rdev == NULL)
+		return;
+	root_res = &rdev->resource[0];
+
+	/* First scan 1st level */
+	for (np = NULL; (np = of_get_next_child(pnode, np)) != NULL;) {
+		if (!macio_skip_device(np)) {
+			of_node_get(np);
+			mdev = macio_add_one_device(chip, &rdev->ofdev.dev, np, NULL, root_res);
+			if (mdev == NULL)
+				of_node_put(np);
+			else if (strncmp(np->name, "media-bay", 9) == 0)
+				mbdev = mdev;
+			else if (strncmp(np->name, "escc", 4) == 0)
+				sdev = mdev;
+		}
+	}
+
+	/* Add media bay devices if any */
+	if (mbdev)
+		for (np = NULL; (np = of_get_next_child(mbdev->ofdev.node, np)) != NULL;)
+			if (!macio_skip_device(np)) {
+				of_node_get(np);
+				if (macio_add_one_device(chip, &mbdev->ofdev.dev, np, mbdev,
+							 root_res) == NULL)
+					of_node_put(np);
+			}
+	/* Add serial ports if any */
+	if (sdev) {
+		for (np = NULL; (np = of_get_next_child(sdev->ofdev.node, np)) != NULL;)
+			if (!macio_skip_device(np)) {
+				of_node_get(np);
+				if (macio_add_one_device(chip, &sdev->ofdev.dev, np, NULL,
+							 root_res) == NULL)
+					of_node_put(np);
+			}
+	}
+}
+
+
+/**
+ * macio_register_driver - Registers a new MacIO device driver
+ * @drv: pointer to the driver definition structure
+ */
+int macio_register_driver(struct macio_driver *drv)
+{
+	int count = 0;
+
+	/* initialize common driver fields */
+	drv->driver.name = drv->name;
+	drv->driver.bus = &macio_bus_type;
+	drv->driver.probe = macio_device_probe;
+	drv->driver.remove = macio_device_remove;
+	drv->driver.shutdown = macio_device_shutdown;
+
+	/* register with core */
+	count = driver_register(&drv->driver);
+	return count ? count : 1;
+}
+
+/**
+ * macio_unregister_driver - Unregisters a new MacIO device driver
+ * @drv: pointer to the driver definition structure
+ */
+void macio_unregister_driver(struct macio_driver *drv)
+{
+	driver_unregister(&drv->driver);
+}
+
+/**
+ *	macio_request_resource - Request an MMIO resource
+ * 	@dev: pointer to the device holding the resource
+ *	@resource_no: resource number to request
+ *	@name: resource name
+ *
+ *	Mark  memory region number @resource_no associated with MacIO
+ *	device @dev as being reserved by owner @name.  Do not access
+ *	any address inside the memory regions unless this call returns
+ *	successfully.
+ *
+ *	Returns 0 on success, or %EBUSY on error.  A warning
+ *	message is also printed on failure.
+ */
+int macio_request_resource(struct macio_dev *dev, int resource_no, const char *name)
+{
+	if (macio_resource_len(dev, resource_no) == 0)
+		return 0;
+		
+	if (!request_mem_region(macio_resource_start(dev, resource_no),
+				macio_resource_len(dev, resource_no),
+				name))
+		goto err_out;
+	
+	return 0;
+
+err_out:
+	printk (KERN_WARNING "MacIO: Unable to reserve resource #%d:%lx@%lx"
+		" for device %s\n",
+		resource_no,
+		macio_resource_len(dev, resource_no),
+		macio_resource_start(dev, resource_no),
+		dev->ofdev.dev.bus_id);
+	return -EBUSY;
+}
+
+/**
+ * macio_release_resource - Release an MMIO resource
+ * @dev: pointer to the device holding the resource
+ * @resource_no: resource number to release
+ */
+void macio_release_resource(struct macio_dev *dev, int resource_no)
+{
+	if (macio_resource_len(dev, resource_no) == 0)
+		return;
+	release_mem_region(macio_resource_start(dev, resource_no),
+			   macio_resource_len(dev, resource_no));
+}
+
+/**
+ *	macio_request_resources - Reserve all memory resources
+ *	@dev: MacIO device whose resources are to be reserved
+ *	@name: Name to be associated with resource.
+ *
+ *	Mark all memory regions associated with MacIO device @dev as
+ *	being reserved by owner @name.  Do not access any address inside
+ *	the memory regions unless this call returns successfully.
+ *
+ *	Returns 0 on success, or %EBUSY on error.  A warning
+ *	message is also printed on failure.
+ */
+int macio_request_resources(struct macio_dev *dev, const char *name)
+{
+	int i;
+	
+	for (i = 0; i < dev->n_resources; i++)
+		if (macio_request_resource(dev, i, name))
+			goto err_out;
+	return 0;
+
+err_out:
+	while(--i >= 0)
+		macio_release_resource(dev, i);
+		
+	return -EBUSY;
+}
+
+/**
+ *	macio_release_resources - Release reserved memory resources
+ *	@dev: MacIO device whose resources were previously reserved
+ */
+
+void macio_release_resources(struct macio_dev *dev)
+{
+	int i;
+	
+	for (i = 0; i < dev->n_resources; i++)
+		macio_release_resource(dev, i);
+}
+
+
+#ifdef CONFIG_PCI
+
+static int __devinit macio_pci_probe(struct pci_dev *pdev, const struct pci_device_id *ent)
+{
+	struct device_node* np;
+	struct macio_chip* chip;
+	
+	if (ent->vendor != PCI_VENDOR_ID_APPLE)
+		return -ENODEV;
+
+	/* Note regarding refcounting: We assume pci_device_to_OF_node() is ported
+	 * to new OF APIs and returns a node with refcount incremented. This isn't
+	 * the case today, but on the other hand ppc32 doesn't do refcounting. This
+	 * will have to be fixed when going to ppc64. --BenH.
+	 */
+	np = pci_device_to_OF_node(pdev);
+	if (np == NULL)
+		return -ENODEV;
+
+	/* This assumption is wrong, fix that here for now until I fix the arch */
+	of_node_get(np);
+
+	/* We also assume that pmac_feature will have done a get() on nodes stored
+	 * in the macio chips array
+	 */
+	chip = macio_find(np, macio_unknown);
+       	of_node_put(np);
+	if (chip == NULL)
+		return -ENODEV;
+
+	/* XXX Need locking ??? */
+	if (chip->lbus.pdev == NULL) {
+		chip->lbus.pdev = pdev;
+		chip->lbus.chip = chip;
+		pci_set_drvdata(pdev, &chip->lbus);
+		pci_set_master(pdev);
+	}
+
+	printk(KERN_INFO "MacIO PCI driver attached to %s chipset\n",
+		chip->name);
+
+	/*
+	 * HACK ALERT: The WallStreet PowerBook and some OHare based machines
+	 * have 2 macio ASICs. I must probe the "main" one first or IDE ordering
+	 * will be incorrect. So I put on "hold" the second one since it seem to
+	 * appear first on PCI
+	 */
+	if (chip->type == macio_gatwick || chip->type == macio_ohareII)
+		if (macio_chips[0].lbus.pdev == NULL) {
+			macio_on_hold = chip;
+			return 0;
+		}
+
+	macio_pci_add_devices(chip);
+	if (macio_on_hold && macio_chips[0].lbus.pdev != NULL) {
+		macio_pci_add_devices(macio_on_hold);
+		macio_on_hold = NULL;
+	}
+
+	return 0;
+}
+
+static void __devexit macio_pci_remove(struct pci_dev* pdev)
+{
+	panic("removing of macio-asic not supported !\n");
+}
+
+/*
+ * MacIO is matched against any Apple ID, it's probe() function
+ * will then decide wether it applies or not
+ */
+static const struct pci_device_id __devinitdata pci_ids [] = { {
+	.vendor		= PCI_VENDOR_ID_APPLE,
+	.device		= PCI_ANY_ID,
+	.subvendor	= PCI_ANY_ID,
+	.subdevice	= PCI_ANY_ID,
+
+	}, { /* end: all zeroes */ }
+};
+MODULE_DEVICE_TABLE (pci, pci_ids);
+
+/* pci driver glue; this is a "new style" PCI driver module */
+static struct pci_driver macio_pci_driver = {
+	.name		= (char *) "macio",
+	.id_table	= pci_ids,
+
+	.probe		= macio_pci_probe,
+	.remove		= macio_pci_remove,
+};
+
+#endif /* CONFIG_PCI */
+
+static int __init macio_module_init (void) 
+{
+#ifdef CONFIG_PCI
+	int rc;
+
+	rc = pci_register_driver(&macio_pci_driver);
+	if (rc)
+		return rc;
+#endif /* CONFIG_PCI */
+	return 0;
+}
+
+module_init(macio_module_init);
+
+EXPORT_SYMBOL(macio_register_driver);
+EXPORT_SYMBOL(macio_unregister_driver);
+EXPORT_SYMBOL(macio_dev_get);
+EXPORT_SYMBOL(macio_dev_put);
+EXPORT_SYMBOL(macio_request_resource);
+EXPORT_SYMBOL(macio_release_resource);
+EXPORT_SYMBOL(macio_request_resources);
+EXPORT_SYMBOL(macio_release_resources);