Root/
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 | |
10 | #include <linux/kernel.h> |
11 | #include <linux/platform_device.h> |
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 | |
50 | static int __init virtual_eisa_root_init (void) |
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 | dev_set_drvdata(&eisa_root_dev.dev, &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); |
75 |
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v2.6.34-rc5
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