projects / deliverable / linux.git / blame
| Commit | Line | Data |
|---|---|---|
| 1da177e4 LT |
1 | /* |
| 2 | * Minimalist driver for a generic PCI-to-EISA bridge. | |
| 3 | * | |
| 4 | * (C) 2003 Marc Zyngier <maz@wild-wind.fr.eu.org> | |
| 5 | * | |
| 6 | * This code is released under the GPL version 2. | |
| 7 | * | |
| 8 | * Ivan Kokshaysky <ink@jurassic.park.msu.ru> : | |
| 9 | * Generalisation from i82375 to PCI_CLASS_BRIDGE_EISA. | |
| 10 | */ | |
| 11 | ||
| 12 | #include <linux/kernel.h> | |
| 13 | #include <linux/device.h> | |
| 14 | #include <linux/eisa.h> | |
| 15 | #include <linux/pci.h> | |
| 16 | #include <linux/module.h> | |
| 17 | #include <linux/init.h> | |
| 18 | ||
| 19 | /* There is only *one* pci_eisa device per machine, right ? */ | |
| 20 | static struct eisa_root_device pci_eisa_root; | |
| 21 | ||
| 74b9a297 AB |
22 | static int __init pci_eisa_init(struct pci_dev *pdev, |
| 23 | const struct pci_device_id *ent) | |
| 1da177e4 | 24 | { |
| 2cfda637 YL |
25 | int rc, i; |
| 26 | struct resource *res, *bus_res = NULL; | |
| 1da177e4 LT |
27 | |
| 28 | if ((rc = pci_enable_device (pdev))) { | |
| 29 | printk (KERN_ERR "pci_eisa : Could not enable device %s\n", | |
| 30 | pci_name(pdev)); | |
| 31 | return rc; | |
| 32 | } | |
| 33 | ||
| 2cfda637 YL |
34 | /* |
| 35 | * The Intel 82375 PCI-EISA bridge is a subtractive-decode PCI | |
| 36 | * device, so the resources available on EISA are the same as those | |
| 37 | * available on the 82375 bus. This works the same as a PCI-PCI | |
| 38 | * bridge in subtractive-decode mode (see pci_read_bridge_bases()). | |
| 39 | * We assume other PCI-EISA bridges are similar. | |
| 40 | * | |
| 41 | * eisa_root_register() can only deal with a single io port resource, | |
| 42 | * so we use the first valid io port resource. | |
| 43 | */ | |
| 44 | pci_bus_for_each_resource(pdev->bus, res, i) | |
| 45 | if (res && (res->flags & IORESOURCE_IO)) { | |
| 46 | bus_res = res; | |
| 47 | break; | |
| 48 | } | |
| 49 | ||
| 50 | if (!bus_res) { | |
| 51 | dev_err(&pdev->dev, "No resources available\n"); | |
| 52 | return -1; | |
| 53 | } | |
| 54 | ||
| 1da177e4 | 55 | pci_eisa_root.dev = &pdev->dev; |
| 2cfda637 YL |
56 | pci_eisa_root.res = bus_res; |
| 57 | pci_eisa_root.bus_base_addr = bus_res->start; | |
| 1da177e4 LT |
58 | pci_eisa_root.slots = EISA_MAX_SLOTS; |
| 59 | pci_eisa_root.dma_mask = pdev->dma_mask; | |
| 4b9d0d3b | 60 | dev_set_drvdata(pci_eisa_root.dev, &pci_eisa_root); |
| 1da177e4 LT |
61 | |
| 62 | if (eisa_root_register (&pci_eisa_root)) { | |
| 63 | printk (KERN_ERR "pci_eisa : Could not register EISA root\n"); | |
| 64 | return -1; | |
| 65 | } | |
| 66 | ||
| 67 | return 0; | |
| 68 | } | |
| 69 | ||
| 82de9a0c | 70 | static struct pci_device_id pci_eisa_pci_tbl[] = { |
| 1da177e4 LT |
71 | { PCI_ANY_ID, PCI_ANY_ID, PCI_ANY_ID, PCI_ANY_ID, |
| 72 | PCI_CLASS_BRIDGE_EISA << 8, 0xffff00, 0 }, | |
| 73 | { 0, } | |
| 74 | }; | |
| 75 | ||
| 82de9a0c | 76 | static struct pci_driver __refdata pci_eisa_driver = { |
| 1da177e4 LT |
77 | .name = "pci_eisa", |
| 78 | .id_table = pci_eisa_pci_tbl, | |
| 79 | .probe = pci_eisa_init, | |
| 80 | }; | |
| 81 | ||
| 82 | static int __init pci_eisa_init_module (void) | |
| 83 | { | |
| 84 | return pci_register_driver (&pci_eisa_driver); | |
| 85 | } | |
| 86 | ||
| 87 | device_initcall(pci_eisa_init_module); | |
| 88 | MODULE_DEVICE_TABLE(pci, pci_eisa_pci_tbl); |