1 /*
2 * Virtual EISA root driver.
3 * Acts as a placeholder if we don't have a proper EISA bridge.
4 *
5 * (C) 2003 Marc Zyngier <maz@wild-wind.fr.eu.org>
6 * modified for SNI usage by Thomas Bogendoerfer
7 *
8 * This code is released under the GPL version 2.
9 */
10
11 #include <linux/kernel.h>
12 #include <linux/platform_device.h>
13 #include <linux/eisa.h>
14 #include <linux/init.h>
15
16 /* The default EISA device parent (virtual root device).
17 * Now use a platform device, since that's the obvious choice. */
18
19 static struct platform_device eisa_root_dev = {
20 .name = "eisa",
21 .id = 0,
22 };
23
24 static struct eisa_root_device eisa_bus_root = {
25 .dev = &eisa_root_dev.dev,
26 .bus_base_addr = 0,
27 .res = &ioport_resource,
28 .slots = EISA_MAX_SLOTS,
29 .dma_mask = 0xffffffff,
30 .force_probe = 1,
31 };
32
sni_eisa_root_init(void)33 int __init sni_eisa_root_init(void)
34 {
35 int r;
36
37 r = platform_device_register(&eisa_root_dev);
38 if (!r)
39 return r;
40
41 dev_set_drvdata(&eisa_root_dev.dev, &eisa_bus_root);
42
43 if (eisa_root_register(&eisa_bus_root)) {
44 /* A real bridge may have been registered before
45 * us. So quietly unregister. */
46 platform_device_unregister(&eisa_root_dev);
47 return -1;
48 }
49 return 0;
50 }
51