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
gen_pci_probe(struct platform_device * pdev)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 .suppress_bind_attrs = true,
64 },
65 .probe = gen_pci_probe,
66 };
67 builtin_platform_driver(gen_pci_driver);
68