2 * Virtual EISA root driver.
3 * Acts as a placeholder if we don't have a proper EISA bridge.
5 * (C) 2003 Marc Zyngier <maz@wild-wind.fr.eu.org>
7 * This code is released under the GPL version 2.
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>
17 #if defined(CONFIG_ALPHA_JENSEN) || defined(CONFIG_EISA_VLB_PRIMING)
18 #define EISA_FORCE_PROBE_DEFAULT 1
20 #define EISA_FORCE_PROBE_DEFAULT 0
23 static int force_probe = EISA_FORCE_PROBE_DEFAULT;
24 static void virtual_eisa_release (struct device *);
26 /* The default EISA device parent (virtual root device).
27 * Now use a platform device, since that's the obvious choice. */
29 static struct platform_device eisa_root_dev = {
33 .release = virtual_eisa_release,
37 static struct eisa_root_device eisa_bus_root = {
38 .dev = &eisa_root_dev.dev,
40 .res = &ioport_resource,
41 .slots = EISA_MAX_SLOTS,
42 .dma_mask = 0xffffffff,
45 static void virtual_eisa_release (struct device *dev)
47 /* nothing really to do here */
50 static int __init virtual_eisa_root_init (void)
54 if ((r = platform_device_register (&eisa_root_dev))) {
58 eisa_bus_root.force_probe = force_probe;
60 dev_set_drvdata(&eisa_root_dev.dev, &eisa_bus_root);
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);
72 module_param (force_probe, int, 0444);
74 device_initcall (virtual_eisa_root_init);