1*4882a593Smuzhiyun // SPDX-License-Identifier: GPL-2.0-only
2*4882a593Smuzhiyun /*
3*4882a593Smuzhiyun * Virtual EISA root driver.
4*4882a593Smuzhiyun * Acts as a placeholder if we don't have a proper EISA bridge.
5*4882a593Smuzhiyun *
6*4882a593Smuzhiyun * (C) 2003 Marc Zyngier <maz@wild-wind.fr.eu.org>
7*4882a593Smuzhiyun * modified for SNI usage by Thomas Bogendoerfer
8*4882a593Smuzhiyun */
9*4882a593Smuzhiyun
10*4882a593Smuzhiyun #include <linux/kernel.h>
11*4882a593Smuzhiyun #include <linux/platform_device.h>
12*4882a593Smuzhiyun #include <linux/eisa.h>
13*4882a593Smuzhiyun #include <linux/init.h>
14*4882a593Smuzhiyun
15*4882a593Smuzhiyun /* The default EISA device parent (virtual root device).
16*4882a593Smuzhiyun * Now use a platform device, since that's the obvious choice. */
17*4882a593Smuzhiyun
18*4882a593Smuzhiyun static struct platform_device eisa_root_dev = {
19*4882a593Smuzhiyun .name = "eisa",
20*4882a593Smuzhiyun .id = 0,
21*4882a593Smuzhiyun };
22*4882a593Smuzhiyun
23*4882a593Smuzhiyun static struct eisa_root_device eisa_bus_root = {
24*4882a593Smuzhiyun .dev = &eisa_root_dev.dev,
25*4882a593Smuzhiyun .bus_base_addr = 0,
26*4882a593Smuzhiyun .res = &ioport_resource,
27*4882a593Smuzhiyun .slots = EISA_MAX_SLOTS,
28*4882a593Smuzhiyun .dma_mask = 0xffffffff,
29*4882a593Smuzhiyun .force_probe = 1,
30*4882a593Smuzhiyun };
31*4882a593Smuzhiyun
sni_eisa_root_init(void)32*4882a593Smuzhiyun int __init sni_eisa_root_init(void)
33*4882a593Smuzhiyun {
34*4882a593Smuzhiyun int r;
35*4882a593Smuzhiyun
36*4882a593Smuzhiyun r = platform_device_register(&eisa_root_dev);
37*4882a593Smuzhiyun if (!r)
38*4882a593Smuzhiyun return r;
39*4882a593Smuzhiyun
40*4882a593Smuzhiyun dev_set_drvdata(&eisa_root_dev.dev, &eisa_bus_root);
41*4882a593Smuzhiyun
42*4882a593Smuzhiyun if (eisa_root_register(&eisa_bus_root)) {
43*4882a593Smuzhiyun /* A real bridge may have been registered before
44*4882a593Smuzhiyun * us. So quietly unregister. */
45*4882a593Smuzhiyun platform_device_unregister(&eisa_root_dev);
46*4882a593Smuzhiyun return -1;
47*4882a593Smuzhiyun }
48*4882a593Smuzhiyun return 0;
49*4882a593Smuzhiyun }
50