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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 | |
10 | #include <linux/kernel.h> |
11 | #include <linux/init.h> |
12 | #include <linux/module.h> |
13 | #include <linux/ide.h> |
14 | |
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 | |
84 | static int __init ide_scan_pcibus(void) |
85 | { |
86 | struct pci_dev *dev = NULL; |
87 | struct pci_driver *d; |
88 | struct list_head *l, *n; |
89 | |
90 | pre_init = 0; |
91 | while ((dev = pci_get_device(PCI_ANY_ID, PCI_ANY_ID, dev))) |
92 | ide_scan_pcidev(dev); |
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", |
105 | __func__, d->driver.mod_name); |
106 | } |
107 | |
108 | return 0; |
109 | } |
110 | |
111 | module_init(ide_scan_pcibus); |
112 |
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