1 files changed, 110 insertions, 0 deletions

diff --git a/drivers/ide/ide-scan-pci.c b/drivers/ide/ide-scan-pci.c
index 23015d89e73..7ffa332d77c 100644
--- a/drivers/ide/ide-scan-pci.c
+++ b/drivers/ide/ide-scan-pci.c
@@ -1,8 +1,118 @@
+/*
+ * support for probing IDE PCI devices in the PCI bus order
+ *
+ * Copyright (c) 1998-2000  Andre Hedrick <andre@linux-ide.org>
+ * Copyright (c) 1995-1998  Mark Lord
+ *
+ * May be copied or modified under the terms of the GNU General Public License
+ */
+
 #include <linux/kernel.h>
 #include <linux/init.h>
 #include <linux/module.h>
 #include <linux/ide.h>
 
+/*
+ *	Module interfaces
+ */
+
+static int pre_init = 1;		/* Before first ordered IDE scan */
+static LIST_HEAD(ide_pci_drivers);
+
+/*
+ *	__ide_pci_register_driver	-	attach IDE driver
+ *	@driver: pci driver
+ *	@module: owner module of the driver
+ *
+ *	Registers a driver with the IDE layer. The IDE layer arranges that
+ *	boot time setup is done in the expected device order and then
+ *	hands the controllers off to the core PCI code to do the rest of
+ *	the work.
+ *
+ *	Returns are the same as for pci_register_driver
+ */
+
+int __ide_pci_register_driver(struct pci_driver *driver, struct module *module,
+			      const char *mod_name)
+{
+	if (!pre_init)
+		return __pci_register_driver(driver, module, mod_name);
+	driver->driver.owner = module;
+	list_add_tail(&driver->node, &ide_pci_drivers);
+	return 0;
+}
+EXPORT_SYMBOL_GPL(__ide_pci_register_driver);
+
+/**
+ *	ide_scan_pcidev		-	find an IDE driver for a device
+ *	@dev: PCI device to check
+ *
+ *	Look for an IDE driver to handle the device we are considering.
+ *	This is only used during boot up to get the ordering correct. After
+ *	boot up the pci layer takes over the job.
+ */
+
+static int __init ide_scan_pcidev(struct pci_dev *dev)
+{
+	struct list_head *l;
+	struct pci_driver *d;
+
+	list_for_each(l, &ide_pci_drivers) {
+		d = list_entry(l, struct pci_driver, node);
+		if (d->id_table) {
+			const struct pci_device_id *id =
+				pci_match_id(d->id_table, dev);
+
+			if (id != NULL && d->probe(dev, id) >= 0) {
+				dev->driver = d;
+				pci_dev_get(dev);
+				return 1;
+			}
+		}
+	}
+	return 0;
+}
+
+/**
+ *	ide_scan_pcibus		-	perform the initial IDE driver scan
+ *
+ *	Perform the initial bus rather than driver ordered scan of the
+ *	PCI drivers. After this all IDE pci handling becomes standard
+ *	module ordering not traditionally ordered.
+ */
+
+int __init ide_scan_pcibus(void)
+{
+	struct pci_dev *dev = NULL;
+	struct pci_driver *d;
+	struct list_head *l, *n;
+
+	pre_init = 0;
+	if (!ide_scan_direction)
+		while ((dev = pci_get_device(PCI_ANY_ID, PCI_ANY_ID, dev)))
+			ide_scan_pcidev(dev);
+	else
+		while ((dev = pci_get_device_reverse(PCI_ANY_ID, PCI_ANY_ID,
+						     dev)))
+			ide_scan_pcidev(dev);
+
+	/*
+	 *	Hand the drivers over to the PCI layer now we
+	 *	are post init.
+	 */
+
+	list_for_each_safe(l, n, &ide_pci_drivers) {
+		list_del(l);
+		d = list_entry(l, struct pci_driver, node);
+		if (__pci_register_driver(d, d->driver.owner,
+					  d->driver.mod_name))
+			printk(KERN_ERR "%s: failed to register %s driver\n",
+					__FUNCTION__, d->driver.mod_name);
+	}
+
+	return 0;
+}
+
 static int __init ide_scan_pci(void)
 {
 	return ide_scan_pcibus();