| /* |
| * Minimalist driver for a generic PCI-to-EISA bridge. |
| * |
| * (C) 2003 Marc Zyngier <maz@wild-wind.fr.eu.org> |
| * |
| * This code is released under the GPL version 2. |
| * |
| * Ivan Kokshaysky <ink@jurassic.park.msu.ru> : |
| * Generalisation from i82375 to PCI_CLASS_BRIDGE_EISA. |
| */ |
| |
| #include <linux/kernel.h> |
| #include <linux/device.h> |
| #include <linux/eisa.h> |
| #include <linux/pci.h> |
| #include <linux/module.h> |
| #include <linux/init.h> |
| |
| /* There is only *one* pci_eisa device per machine, right ? */ |
| static struct eisa_root_device pci_eisa_root; |
| |
| static int __init pci_eisa_init(struct pci_dev *pdev, |
| const struct pci_device_id *ent) |
| { |
| int rc, i; |
| struct resource *res, *bus_res = NULL; |
| |
| if ((rc = pci_enable_device (pdev))) { |
| printk (KERN_ERR "pci_eisa : Could not enable device %s\n", |
| pci_name(pdev)); |
| return rc; |
| } |
| |
| /* |
| * The Intel 82375 PCI-EISA bridge is a subtractive-decode PCI |
| * device, so the resources available on EISA are the same as those |
| * available on the 82375 bus. This works the same as a PCI-PCI |
| * bridge in subtractive-decode mode (see pci_read_bridge_bases()). |
| * We assume other PCI-EISA bridges are similar. |
| * |
| * eisa_root_register() can only deal with a single io port resource, |
| * so we use the first valid io port resource. |
| */ |
| pci_bus_for_each_resource(pdev->bus, res, i) |
| if (res && (res->flags & IORESOURCE_IO)) { |
| bus_res = res; |
| break; |
| } |
| |
| if (!bus_res) { |
| dev_err(&pdev->dev, "No resources available\n"); |
| return -1; |
| } |
| |
| pci_eisa_root.dev = &pdev->dev; |
| pci_eisa_root.res = bus_res; |
| pci_eisa_root.bus_base_addr = bus_res->start; |
| pci_eisa_root.slots = EISA_MAX_SLOTS; |
| pci_eisa_root.dma_mask = pdev->dma_mask; |
| dev_set_drvdata(pci_eisa_root.dev, &pci_eisa_root); |
| |
| if (eisa_root_register (&pci_eisa_root)) { |
| printk (KERN_ERR "pci_eisa : Could not register EISA root\n"); |
| return -1; |
| } |
| |
| return 0; |
| } |
| |
| static struct pci_device_id pci_eisa_pci_tbl[] = { |
| { PCI_ANY_ID, PCI_ANY_ID, PCI_ANY_ID, PCI_ANY_ID, |
| PCI_CLASS_BRIDGE_EISA << 8, 0xffff00, 0 }, |
| { 0, } |
| }; |
| |
| static struct pci_driver __refdata pci_eisa_driver = { |
| .name = "pci_eisa", |
| .id_table = pci_eisa_pci_tbl, |
| .probe = pci_eisa_init, |
| }; |
| |
| static int __init pci_eisa_init_module (void) |
| { |
| return pci_register_driver (&pci_eisa_driver); |
| } |
| |
| device_initcall(pci_eisa_init_module); |
| MODULE_DEVICE_TABLE(pci, pci_eisa_pci_tbl); |