/*
   * Bus & driver management routines for devices within
   * a MacIO ASIC. Interface to new driver model mostly
   * stolen from the PCI version.
   * 

   *  Copyright (C) 2005 Ben. Herrenschmidt (benh@kernel.crashing.org)
   *
   *  This program is free software; you can redistribute it and/or
   *  modify it under the terms of the GNU General Public License
   *  as published by the Free Software Foundation; either version
   *  2 of the License, or (at your option) any later 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/string.h>
  #include <linux/kernel.h>
  #include <linux/pci.h>
  #include <linux/pci_ids.h>
  #include <linux/init.h>
  #include <linux/module.h>

  #include <linux/slab.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 (20 - 12)

  
  static struct macio_chip      *macio_on_hold;
  
  static int macio_bus_match(struct device *dev, struct device_driver *drv) 
  {

  	const struct of_device_id * matches = drv->of_match_table;

  
  	if (!matches) 
  		return 0;

  	return of_match_device(matches, dev) != 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_device_id *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->driver.of_match_table, dev);

  	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, pm_message_t 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;
  }

  extern struct device_attribute macio_dev_attrs[];

  struct bus_type macio_bus_type = {
         .name	= "macio",
         .match	= macio_bus_match,

         .uevent = of_device_uevent,

         .probe	= macio_device_probe,
         .remove	= macio_device_remove,
         .shutdown = macio_device_shutdown,

         .suspend	= macio_device_suspend,
         .resume	= macio_device_resume,

         .dev_attrs = macio_dev_attrs,

  };
  
  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)

  {

  	/* Only quirks for memory resources for now */
  	if ((res->flags & IORESOURCE_MEM) == 0)
  		return 0;
  
  	/* Grand Central has too large resource 0 on some machines */
  	if (index == 0 && !strcmp(np->name, "gc"))
  		res->end = res->start + 0x1ffff;

  	/* Airport has bogus resource 2 */
  	if (index >= 2 && !strcmp(np->name, "radio"))
  		return 1;

  
  #ifndef CONFIG_PPC64

  	/* DBDMAs may have bogus sizes */
  	if ((res->start & 0x0001f000) == 0x00008000)
  		res->end = res->start + 0xff;

  #endif /* CONFIG_PPC64 */

  	/* 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 && (res->end - res->start) > 0xfff)
  			res->end = res->start + 0xfff;
  		if (index == 1 && (res->end - res->start) > 0xff)
  			res->end = res->start + 0xff;

  	}
  	return 0;
  }

  static void macio_create_fixup_irq(struct macio_dev *dev, int index,
  				   unsigned int line)
  {
  	unsigned int irq;

  	irq = irq_create_mapping(NULL, line);

  	if (irq != NO_IRQ) {
  		dev->interrupt[index].start = irq;
  		dev->interrupt[index].flags = IORESOURCE_IRQ;

  		dev->interrupt[index].name = dev_name(&dev->ofdev.dev);

  	}
  	if (dev->n_interrupts <= index)
  		dev->n_interrupts = index + 1;
  }
  
  static void macio_add_missing_resources(struct macio_dev *dev)

  {

  	struct device_node *np = dev->ofdev.dev.of_node;

  	unsigned int irq_base;
  
  	/* Gatwick has some missing interrupts on child nodes */
  	if (dev->bus->chip->type != macio_gatwick)
  		return;

  	/* irq_base is always 64 on gatwick. I have no cleaner way to get
  	 * that value from here at this point

  	 */

  	irq_base = 64;
  
  	/* Fix SCC */
  	if (strcmp(np->name, "ch-a") == 0) {
  		macio_create_fixup_irq(dev, 0, 15 + irq_base);
  		macio_create_fixup_irq(dev, 1,  4 + irq_base);
  		macio_create_fixup_irq(dev, 2,  5 + irq_base);
  		printk(KERN_INFO "macio: fixed SCC irqs on gatwick
  ");
  	}
  
  	/* Fix media-bay */
  	if (strcmp(np->name, "media-bay") == 0) {
  		macio_create_fixup_irq(dev, 0, 29 + irq_base);
  		printk(KERN_INFO "macio: fixed media-bay irq on gatwick
  ");
  	}
  
  	/* Fix left media bay childs */
  	if (dev->media_bay != NULL && strcmp(np->name, "floppy") == 0) {
  		macio_create_fixup_irq(dev, 0, 19 + irq_base);
  		macio_create_fixup_irq(dev, 1,  1 + irq_base);
  		printk(KERN_INFO "macio: fixed left floppy irqs
  ");
  	}
  	if (dev->media_bay != NULL && strcasecmp(np->name, "ata4") == 0) {
  		macio_create_fixup_irq(dev, 0, 14 + irq_base);
  		macio_create_fixup_irq(dev, 0,  3 + irq_base);
  		printk(KERN_INFO "macio: fixed left ide irqs
  ");
  	}
  }
  
  static void macio_setup_interrupts(struct macio_dev *dev)
  {

  	struct device_node *np = dev->ofdev.dev.of_node;

  	unsigned int irq;
  	int i = 0, j = 0;
  
  	for (;;) {

  		struct resource *res;

  
  		if (j >= MACIO_DEV_COUNT_IRQS)
  			break;

  		res = &dev->interrupt[j];

  		irq = irq_of_parse_and_map(np, i++);
  		if (irq == NO_IRQ)
  			break;
  		res->start = irq;
  		res->flags = IORESOURCE_IRQ;

  		res->name = dev_name(&dev->ofdev.dev);

  		if (macio_resource_quirks(np, res, i - 1)) {

  			memset(res, 0, sizeof(struct resource));

  			continue;
  		} else

  			j++;
  	}
  	dev->n_interrupts = j;
  }
  
  static void macio_setup_resources(struct macio_dev *dev,
  				  struct resource *parent_res)
  {

  	struct device_node *np = dev->ofdev.dev.of_node;

  	struct resource r;

  	int index;

  	for (index = 0; of_address_to_resource(np, index, &r) == 0; index++) {

  		struct resource *res;

  		if (index >= MACIO_DEV_COUNT_RESOURCES)
  			break;

  		res = &dev->resource[index];

  		*res = r;

  		res->name = dev_name(&dev->ofdev.dev);

  
  		if (macio_resource_quirks(np, res, index)) {
  			memset(res, 0, sizeof(struct resource));
  			continue;
  		}
  		/* 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
  ",

  			       index, dev_name(&dev->ofdev.dev));

  		}
  	}
  	dev->n_resources = index;
  }

  /**
   * 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;

  	const u32 *reg;

  	
  	if (np == NULL)
  		return NULL;

  	dev = kzalloc(sizeof(*dev), GFP_KERNEL);

  	if (!dev)
  		return NULL;

  
  	dev->bus = &chip->lbus;
  	dev->media_bay = in_bay;

  	dev->ofdev.dev.of_node = np;

  	dev->ofdev.archdata.dma_mask = 0xffffffffUL;
  	dev->ofdev.dev.dma_mask = &dev->ofdev.archdata.dma_mask;

  	dev->ofdev.dev.parent = parent;
  	dev->ofdev.dev.bus = &macio_bus_type;
  	dev->ofdev.dev.release = macio_release_dev;

  	dev->ofdev.dev.dma_parms = &dev->dma_parms;
  
  	/* Standard DMA paremeters */
  	dma_set_max_seg_size(&dev->ofdev.dev, 65536);
  	dma_set_seg_boundary(&dev->ofdev.dev, 0xffffffff);

  #ifdef CONFIG_PCI
  	/* Set the DMA ops to the ones from the PCI device, this could be
  	 * fishy if we didn't know that on PowerMac it's always direct ops
  	 * or iommu ops that will work fine

  	 *
  	 * To get all the fields, copy all archdata

  	 */

  	dev->ofdev.dev.archdata = chip->lbus.pdev->dev.archdata;

  #endif /* CONFIG_PCI */

  #ifdef DEBUG
  	printk("preparing mdev @%p, ofdev @%p, dev @%p, kobj @%p
  ",
  	       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) {

  		dev_set_name(&dev->ofdev.dev, "%1d.%08x:%.*s",
  			     chip->lbus.index,

  #ifdef CONFIG_PCI

  			(unsigned int)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 = of_get_property(np, "reg", NULL);

  		dev_set_name(&dev->ofdev.dev, "%1d.%08x:%.*s",
  			     chip->lbus.index,
  			     reg ? *reg : 0, MAX_NODE_NAME_SIZE, np->name);

  	}

  	/* Setup interrupts & resources */
  	macio_setup_interrupts(dev);
  	macio_setup_resources(dev, parent_res);

  	macio_add_missing_resources(dev);

  	/* Register with core */

  	if (of_device_register(&dev->ofdev) != 0) {
  		printk(KERN_DEBUG"macio: device registration error for %s!
  ",

  		       dev_name(&dev->ofdev.dev));

  		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))
  			continue;
  		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) {
  		pnode = mbdev->ofdev.dev.of_node;

  		for (np = NULL; (np = of_get_next_child(pnode, np)) != NULL;) {

  			if (macio_skip_device(np))
  				continue;
  			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) {

  		pnode = sdev->ofdev.dev.of_node;

  		for (np = NULL; (np = of_get_next_child(pnode, np)) != NULL;) {

  			if (macio_skip_device(np))
  				continue;
  			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)
  {

  	/* initialize common driver fields */

  	drv->driver.bus = &macio_bus_type;

  
  	/* register with core */

  	return driver_register(&drv->driver);

  }
  
  /**
   * 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);
  }

  /* Managed MacIO resources */
  struct macio_devres {
  	u32	res_mask;
  };
  
  static void maciom_release(struct device *gendev, void *res)
  {
  	struct macio_dev *dev = to_macio_device(gendev);
  	struct macio_devres *dr = res;
  	int i, max;
  
  	max = min(dev->n_resources, 32);
  	for (i = 0; i < max; i++) {
  		if (dr->res_mask & (1 << i))
  			macio_release_resource(dev, i);
  	}
  }
  
  int macio_enable_devres(struct macio_dev *dev)
  {
  	struct macio_devres *dr;
  
  	dr = devres_find(&dev->ofdev.dev, maciom_release, NULL, NULL);
  	if (!dr) {
  		dr = devres_alloc(maciom_release, sizeof(*dr), GFP_KERNEL);
  		if (!dr)
  			return -ENOMEM;
  	}
  	return devres_get(&dev->ofdev.dev, dr, NULL, NULL) != NULL;
  }
  
  static struct macio_devres * find_macio_dr(struct macio_dev *dev)
  {
  	return devres_find(&dev->ofdev.dev, maciom_release, NULL, NULL);
  }

  /**
   *	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)

  {

  	struct macio_devres *dr = find_macio_dr(dev);

  	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;

  
  	if (dr && resource_no < 32)
  		dr->res_mask |= 1 << resource_no;

  	
  	return 0;
  
  err_out:
  	printk (KERN_WARNING "MacIO: Unable to reserve resource #%d:%lx@%lx"
  		" for device %s
  ",
  		resource_no,
  		macio_resource_len(dev, resource_no),
  		macio_resource_start(dev, resource_no),

  		dev_name(&dev->ofdev.dev));

  	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)
  {

  	struct macio_devres *dr = find_macio_dr(dev);

  	if (macio_resource_len(dev, resource_no) == 0)
  		return;
  	release_mem_region(macio_resource_start(dev, resource_no),
  			   macio_resource_len(dev, resource_no));

  	if (dr && resource_no < 32)
  		dr->res_mask &= ~(1 << 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.

  	 */
  	np = pci_device_to_OF_node(pdev);
  	if (np == NULL)
  		return -ENODEV;

  	/* The above assumption is wrong !!!
  	 * fix that here for now until I fix the arch code
  	 */

  	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
  ",
  		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 !
  ");
  }
  
  /*
   * 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);

  EXPORT_SYMBOL(macio_enable_devres);