macio_asic.c

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	dev = kzalloc(sizeof(*dev), GFP_KERNEL);
	if (!dev)
		return NULL;

	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.%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);
		sprintf(dev->ofdev.dev.bus_id, "%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!\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))
			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)
		for (np = NULL; (np = of_get_next_child(mbdev->ofdev.node, 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) {
		for (np = NULL; (np = of_get_next_child(sdev->ofdev.node, 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.name = drv->name;
	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);
}

/**
 *	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.
	 */
	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\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);