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