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);