[mirror_ubuntu-artful-kernel.git] / drivers / ide / ide-scan-pci.c

/*
 * 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.
 */

static int __init ide_scan_pcibus(void)
{
	struct pci_dev *dev = NULL;
	struct pci_driver *d;
	struct list_head *l, *n;

	pre_init = 0;
	for_each_pci_dev(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",
					__func__, d->driver.mod_name);
	}

	return 0;
}
device_initcall(ide_scan_pcibus);
Commit	Line	Data
9ac59226 BZ	1	/*
	2	* support for probing IDE PCI devices in the PCI bus order
	3	*
	4	* Copyright (c) 1998-2000 Andre Hedrick <andre@linux-ide.org>
	5	* Copyright (c) 1995-1998 Mark Lord
	6	*
	7	* May be copied or modified under the terms of the GNU General Public License
	8	*/
	9
ade2daf9 BZ	10	#include <linux/kernel.h>
	11	#include <linux/init.h>
	12	#include <linux/module.h>
	13	#include <linux/ide.h>
	14
9ac59226 BZ	15	/*
	16	* Module interfaces
	17	*/
	18
	19	static int pre_init = 1; /* Before first ordered IDE scan */
	20	static LIST_HEAD(ide_pci_drivers);
	21
	22	/*
	23	* __ide_pci_register_driver - attach IDE driver
	24	* @driver: pci driver
	25	* @module: owner module of the driver
	26	*
	27	* Registers a driver with the IDE layer. The IDE layer arranges that
	28	* boot time setup is done in the expected device order and then
	29	* hands the controllers off to the core PCI code to do the rest of
	30	* the work.
	31	*
	32	* Returns are the same as for pci_register_driver
	33	*/
	34
	35	int __ide_pci_register_driver(struct pci_driver driver, struct module module,
	36	const char *mod_name)
	37	{
	38	if (!pre_init)
	39	return __pci_register_driver(driver, module, mod_name);
	40	driver->driver.owner = module;
	41	list_add_tail(&driver->node, &ide_pci_drivers);
	42	return 0;
	43	}
	44	EXPORT_SYMBOL_GPL(__ide_pci_register_driver);
	45
	46	/**
	47	* ide_scan_pcidev - find an IDE driver for a device
	48	* @dev: PCI device to check
	49	*
	50	* Look for an IDE driver to handle the device we are considering.
	51	* This is only used during boot up to get the ordering correct. After
	52	* boot up the pci layer takes over the job.
	53	*/
	54
	55	static int __init ide_scan_pcidev(struct pci_dev *dev)
	56	{
	57	struct list_head *l;
	58	struct pci_driver *d;
	59
	60	list_for_each(l, &ide_pci_drivers) {
	61	d = list_entry(l, struct pci_driver, node);
	62	if (d->id_table) {
	63	const struct pci_device_id *id =
	64	pci_match_id(d->id_table, dev);
	65
	66	if (id != NULL && d->probe(dev, id) >= 0) {
	67	dev->driver = d;
	68	pci_dev_get(dev);
	69	return 1;
	70	}
	71	}
	72	}
	73	return 0;
	74	}
	75
	76	/**
	77	* ide_scan_pcibus - perform the initial IDE driver scan
	78	*
79	* Perform the initial bus rather than driver ordered scan of the
80	* PCI drivers. After this all IDE pci handling becomes standard
81	* module ordering not traditionally ordered.
82	*/
83
2eae6ebb	84	static int __init ide_scan_pcibus(void)
9ac59226 BZ	85	{
	86	struct pci_dev *dev = NULL;
	87	struct pci_driver *d;
	88	struct list_head l, n;
	89
	90	pre_init = 0;
db210f82	91	for_each_pci_dev(dev)
a594eeb1	92	ide_scan_pcidev(dev);
9ac59226 BZ	93
	94	/*
	95	* Hand the drivers over to the PCI layer now we
	96	* are post init.
	97	*/
	98
	99	list_for_each_safe(l, n, &ide_pci_drivers) {
	100	list_del(l);
	101	d = list_entry(l, struct pci_driver, node);
	102	if (__pci_register_driver(d, d->driver.owner,
	103	d->driver.mod_name))
	104	printk(KERN_ERR "%s: failed to register %s driver\n",
eb63963a	105	__func__, d->driver.mod_name);
9ac59226 BZ	106	}
	107
	108	return 0;
	109	}
e04a2bd6	110	device_initcall(ide_scan_pcibus);