projects / linux.git / blame
| 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 <[email protected]> | |
| 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 | } | |
| 110 | ||
| 2eae6ebb | 111 | module_init(ide_scan_pcibus); |