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Release 4.14 drivers/eisa/pci_eisa.c

Directory: drivers/eisa
 * Minimalist driver for a generic PCI-to-EISA bridge.
 * (C) 2003 Marc Zyngier <>
 * This code is released under the GPL version 2.
 * Ivan Kokshaysky <> :
 * 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) { int rc, i; struct resource *res, *bus_res = NULL; if ((rc = pci_enable_device (pdev))) { dev_err(&pdev->dev, "Could not enable device\n"); 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; } = &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); if (eisa_root_register (&pci_eisa_root)) { dev_err(&pdev->dev, "Could not register EISA root\n"); return -1; } return 0; }


Marc Zyngier8850.00%228.57%
Yinghai Lu6335.80%114.29%
Björn Helgaas137.39%114.29%
Greg Kroah-Hartman105.68%114.29%
Adrian Bunk10.57%114.29%
Randy Dunlap10.57%114.29%

/* * We have to call pci_eisa_init_early() before pnpacpi_init()/isapnp_init(). * Otherwise pnp resource will get enabled early and could prevent eisa * to be initialized. * Also need to make sure pci_eisa_init_early() is called after * x86/pci_subsys_init(). * So need to use subsys_initcall_sync with it. */
static int __init pci_eisa_init_early(void) { struct pci_dev *dev = NULL; int ret; for_each_pci_dev(dev) if ((dev->class >> 8) == PCI_CLASS_BRIDGE_EISA) { ret = pci_eisa_init(dev); if (ret) return ret; } return 0; }


Yinghai Lu4277.78%150.00%
Marc Zyngier1222.22%150.00%


Overall Contributors

Marc Zyngier12547.89%222.22%
Yinghai Lu10841.38%222.22%
Björn Helgaas134.98%111.11%
Greg Kroah-Hartman103.83%111.11%
Thierry Vignaud31.15%111.11%
Randy Dunlap10.38%111.11%
Adrian Bunk10.38%111.11%
Directory: drivers/eisa
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