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
  29 static 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
  38 static 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
  48 static 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
  59 static 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 };
  66 builtin_platform_driver(gen_pci_driver);