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