LXR linux/drivers/pci/host/pci-host-generic.c

   1/*
   2 * Simple, generic PCI host controller driver targetting firmware-initialised
   3 * systems and virtual machines (e.g. the PCI emulation provided by kvmtool).
   4 *
   5 * This program is free software; you can redistribute it and/or modify
   6 * it under the terms of the GNU General Public License version 2 as
   7 * published by the Free Software Foundation.
   8 *
   9 * This program is distributed in the hope that it will be useful,
  10 * but WITHOUT ANY WARRANTY; without even the implied warranty of
  11 * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
  12 * GNU General Public License for more details.
  13 *
  14 * You should have received a copy of the GNU General Public License
  15 * along with this program.  If not, see <http://www.gnu.org/licenses/>.
  16 *
  17 * Copyright (C) 2014 ARM Limited
  18 *
  19 * Author: Will Deacon <will.deacon@arm.com>
  20 */
  21
  22#include <linux/kernel.h>
  23#include <linux/init.h>
  24#include <linux/of_address.h>
  25#include <linux/of_pci.h>
  26#include <linux/pci-ecam.h>
  27#include <linux/platform_device.h>
  28
  29static struct pci_ecam_ops gen_pci_cfg_cam_bus_ops = {
  30        .bus_shift      = 16,
  31        .pci_ops        = {
  32                .map_bus        = pci_ecam_map_bus,
  33                .read           = pci_generic_config_read,
  34                .write          = pci_generic_config_write,
  35        }
  36};
  37
  38static const struct of_device_id gen_pci_of_match[] = {
  39        { .compatible = "pci-host-cam-generic",
  40          .data = &gen_pci_cfg_cam_bus_ops },
  41
  42        { .compatible = "pci-host-ecam-generic",
  43          .data = &pci_generic_ecam_ops },
  44
  45        { },
  46};
  47
  48static int gen_pci_probe(struct platform_device *pdev)
  49{
  50        const struct of_device_id *of_id;
  51        struct pci_ecam_ops *ops;
  52
  53        of_id = of_match_node(gen_pci_of_match, pdev->dev.of_node);
  54        ops = (struct pci_ecam_ops *)of_id->data;
  55
  56        return pci_host_common_probe(pdev, ops);
  57}
  58
  59static struct platform_driver gen_pci_driver = {
  60        .driver = {
  61                .name = "pci-host-generic",
  62                .of_match_table = gen_pci_of_match,
  63        },
  64        .probe = gen_pci_probe,
  65};
  66builtin_platform_driver(gen_pci_driver);
  67