Commit | Line | Data |
---|---|---|
1da177e4 LT |
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 | * | |
7 | * This code is released under the GPL version 2. | |
8 | */ | |
9 | ||
1da177e4 | 10 | #include <linux/kernel.h> |
d052d1be | 11 | #include <linux/platform_device.h> |
1da177e4 LT |
12 | #include <linux/eisa.h> |
13 | #include <linux/module.h> | |
14 | #include <linux/moduleparam.h> | |
15 | #include <linux/init.h> | |
16 | ||
17 | #if defined(CONFIG_ALPHA_JENSEN) || defined(CONFIG_EISA_VLB_PRIMING) | |
18 | #define EISA_FORCE_PROBE_DEFAULT 1 | |
19 | #else | |
20 | #define EISA_FORCE_PROBE_DEFAULT 0 | |
21 | #endif | |
22 | ||
23 | static int force_probe = EISA_FORCE_PROBE_DEFAULT; | |
24 | static void virtual_eisa_release (struct device *); | |
25 | ||
26 | /* The default EISA device parent (virtual root device). | |
27 | * Now use a platform device, since that's the obvious choice. */ | |
28 | ||
29 | static struct platform_device eisa_root_dev = { | |
30 | .name = "eisa", | |
31 | .id = 0, | |
32 | .dev = { | |
33 | .release = virtual_eisa_release, | |
34 | }, | |
35 | }; | |
36 | ||
37 | static struct eisa_root_device eisa_bus_root = { | |
38 | .dev = &eisa_root_dev.dev, | |
39 | .bus_base_addr = 0, | |
40 | .res = &ioport_resource, | |
41 | .slots = EISA_MAX_SLOTS, | |
42 | .dma_mask = 0xffffffff, | |
43 | }; | |
44 | ||
45 | static void virtual_eisa_release (struct device *dev) | |
46 | { | |
47 | /* nothing really to do here */ | |
48 | } | |
49 | ||
4a1ccb5b | 50 | static int __init virtual_eisa_root_init (void) |
1da177e4 LT |
51 | { |
52 | int r; | |
53 | ||
54 | if ((r = platform_device_register (&eisa_root_dev))) { | |
55 | return r; | |
56 | } | |
57 | ||
58 | eisa_bus_root.force_probe = force_probe; | |
59 | ||
60 | eisa_root_dev.dev.driver_data = &eisa_bus_root; | |
61 | ||
62 | if (eisa_root_register (&eisa_bus_root)) { | |
63 | /* A real bridge may have been registered before | |
64 | * us. So quietly unregister. */ | |
65 | platform_device_unregister (&eisa_root_dev); | |
66 | return -1; | |
67 | } | |
68 | ||
69 | return 0; | |
70 | } | |
71 | ||
72 | module_param (force_probe, int, 0444); | |
73 | ||
74 | device_initcall (virtual_eisa_root_init); |