1*4882a593Smuzhiyun /*
2*4882a593Smuzhiyun * support for probing IDE PCI devices in the PCI bus order
3*4882a593Smuzhiyun *
4*4882a593Smuzhiyun * Copyright (c) 1998-2000 Andre Hedrick <andre@linux-ide.org>
5*4882a593Smuzhiyun * Copyright (c) 1995-1998 Mark Lord
6*4882a593Smuzhiyun *
7*4882a593Smuzhiyun * May be copied or modified under the terms of the GNU General Public License
8*4882a593Smuzhiyun */
9*4882a593Smuzhiyun
10*4882a593Smuzhiyun #include <linux/kernel.h>
11*4882a593Smuzhiyun #include <linux/init.h>
12*4882a593Smuzhiyun #include <linux/module.h>
13*4882a593Smuzhiyun #include <linux/ide.h>
14*4882a593Smuzhiyun
15*4882a593Smuzhiyun /*
16*4882a593Smuzhiyun * Module interfaces
17*4882a593Smuzhiyun */
18*4882a593Smuzhiyun
19*4882a593Smuzhiyun static int pre_init = 1; /* Before first ordered IDE scan */
20*4882a593Smuzhiyun static LIST_HEAD(ide_pci_drivers);
21*4882a593Smuzhiyun
22*4882a593Smuzhiyun /*
23*4882a593Smuzhiyun * __ide_pci_register_driver - attach IDE driver
24*4882a593Smuzhiyun * @driver: pci driver
25*4882a593Smuzhiyun * @module: owner module of the driver
26*4882a593Smuzhiyun *
27*4882a593Smuzhiyun * Registers a driver with the IDE layer. The IDE layer arranges that
28*4882a593Smuzhiyun * boot time setup is done in the expected device order and then
29*4882a593Smuzhiyun * hands the controllers off to the core PCI code to do the rest of
30*4882a593Smuzhiyun * the work.
31*4882a593Smuzhiyun *
32*4882a593Smuzhiyun * Returns are the same as for pci_register_driver
33*4882a593Smuzhiyun */
34*4882a593Smuzhiyun
__ide_pci_register_driver(struct pci_driver * driver,struct module * module,const char * mod_name)35*4882a593Smuzhiyun int __ide_pci_register_driver(struct pci_driver *driver, struct module *module,
36*4882a593Smuzhiyun const char *mod_name)
37*4882a593Smuzhiyun {
38*4882a593Smuzhiyun if (!pre_init)
39*4882a593Smuzhiyun return __pci_register_driver(driver, module, mod_name);
40*4882a593Smuzhiyun driver->driver.owner = module;
41*4882a593Smuzhiyun list_add_tail(&driver->node, &ide_pci_drivers);
42*4882a593Smuzhiyun return 0;
43*4882a593Smuzhiyun }
44*4882a593Smuzhiyun EXPORT_SYMBOL_GPL(__ide_pci_register_driver);
45*4882a593Smuzhiyun
46*4882a593Smuzhiyun /**
47*4882a593Smuzhiyun * ide_scan_pcidev - find an IDE driver for a device
48*4882a593Smuzhiyun * @dev: PCI device to check
49*4882a593Smuzhiyun *
50*4882a593Smuzhiyun * Look for an IDE driver to handle the device we are considering.
51*4882a593Smuzhiyun * This is only used during boot up to get the ordering correct. After
52*4882a593Smuzhiyun * boot up the pci layer takes over the job.
53*4882a593Smuzhiyun */
54*4882a593Smuzhiyun
ide_scan_pcidev(struct pci_dev * dev)55*4882a593Smuzhiyun static int __init ide_scan_pcidev(struct pci_dev *dev)
56*4882a593Smuzhiyun {
57*4882a593Smuzhiyun struct list_head *l;
58*4882a593Smuzhiyun struct pci_driver *d;
59*4882a593Smuzhiyun int ret;
60*4882a593Smuzhiyun
61*4882a593Smuzhiyun list_for_each(l, &ide_pci_drivers) {
62*4882a593Smuzhiyun d = list_entry(l, struct pci_driver, node);
63*4882a593Smuzhiyun if (d->id_table) {
64*4882a593Smuzhiyun const struct pci_device_id *id =
65*4882a593Smuzhiyun pci_match_id(d->id_table, dev);
66*4882a593Smuzhiyun
67*4882a593Smuzhiyun if (id != NULL) {
68*4882a593Smuzhiyun pci_assign_irq(dev);
69*4882a593Smuzhiyun ret = d->probe(dev, id);
70*4882a593Smuzhiyun if (ret >= 0) {
71*4882a593Smuzhiyun dev->driver = d;
72*4882a593Smuzhiyun pci_dev_get(dev);
73*4882a593Smuzhiyun return 1;
74*4882a593Smuzhiyun }
75*4882a593Smuzhiyun }
76*4882a593Smuzhiyun }
77*4882a593Smuzhiyun }
78*4882a593Smuzhiyun return 0;
79*4882a593Smuzhiyun }
80*4882a593Smuzhiyun
81*4882a593Smuzhiyun /**
82*4882a593Smuzhiyun * ide_scan_pcibus - perform the initial IDE driver scan
83*4882a593Smuzhiyun *
84*4882a593Smuzhiyun * Perform the initial bus rather than driver ordered scan of the
85*4882a593Smuzhiyun * PCI drivers. After this all IDE pci handling becomes standard
86*4882a593Smuzhiyun * module ordering not traditionally ordered.
87*4882a593Smuzhiyun */
88*4882a593Smuzhiyun
ide_scan_pcibus(void)89*4882a593Smuzhiyun static int __init ide_scan_pcibus(void)
90*4882a593Smuzhiyun {
91*4882a593Smuzhiyun struct pci_dev *dev = NULL;
92*4882a593Smuzhiyun struct pci_driver *d, *tmp;
93*4882a593Smuzhiyun
94*4882a593Smuzhiyun pre_init = 0;
95*4882a593Smuzhiyun for_each_pci_dev(dev)
96*4882a593Smuzhiyun ide_scan_pcidev(dev);
97*4882a593Smuzhiyun
98*4882a593Smuzhiyun /*
99*4882a593Smuzhiyun * Hand the drivers over to the PCI layer now we
100*4882a593Smuzhiyun * are post init.
101*4882a593Smuzhiyun */
102*4882a593Smuzhiyun
103*4882a593Smuzhiyun list_for_each_entry_safe(d, tmp, &ide_pci_drivers, node) {
104*4882a593Smuzhiyun list_del(&d->node);
105*4882a593Smuzhiyun if (__pci_register_driver(d, d->driver.owner,
106*4882a593Smuzhiyun d->driver.mod_name))
107*4882a593Smuzhiyun printk(KERN_ERR "%s: failed to register %s driver\n",
108*4882a593Smuzhiyun __func__, d->driver.mod_name);
109*4882a593Smuzhiyun }
110*4882a593Smuzhiyun
111*4882a593Smuzhiyun return 0;
112*4882a593Smuzhiyun }
113*4882a593Smuzhiyun device_initcall(ide_scan_pcibus);
114