// SPDX-License-Identifier: GPL-2.0-only
|
/*
|
* Virtual EISA root driver.
|
* Acts as a placeholder if we don't have a proper EISA bridge.
|
*
|
* (C) 2003 Marc Zyngier <maz@wild-wind.fr.eu.org>
|
*/
|
|
#include <linux/kernel.h>
|
#include <linux/platform_device.h>
|
#include <linux/eisa.h>
|
#include <linux/module.h>
|
#include <linux/moduleparam.h>
|
#include <linux/init.h>
|
|
#if defined(CONFIG_ALPHA_JENSEN) || defined(CONFIG_EISA_VLB_PRIMING)
|
#define EISA_FORCE_PROBE_DEFAULT 1
|
#else
|
#define EISA_FORCE_PROBE_DEFAULT 0
|
#endif
|
|
static int force_probe = EISA_FORCE_PROBE_DEFAULT;
|
static void virtual_eisa_release (struct device *);
|
|
/* The default EISA device parent (virtual root device).
|
* Now use a platform device, since that's the obvious choice. */
|
|
static struct platform_device eisa_root_dev = {
|
.name = "eisa",
|
.id = 0,
|
.dev = {
|
.release = virtual_eisa_release,
|
},
|
};
|
|
static struct eisa_root_device eisa_bus_root = {
|
.dev = &eisa_root_dev.dev,
|
.bus_base_addr = 0,
|
.res = &ioport_resource,
|
.slots = EISA_MAX_SLOTS,
|
.dma_mask = 0xffffffff,
|
};
|
|
static void virtual_eisa_release (struct device *dev)
|
{
|
/* nothing really to do here */
|
}
|
|
static int __init virtual_eisa_root_init (void)
|
{
|
int r;
|
|
if ((r = platform_device_register (&eisa_root_dev)))
|
return r;
|
|
eisa_bus_root.force_probe = force_probe;
|
|
dev_set_drvdata(&eisa_root_dev.dev, &eisa_bus_root);
|
|
if (eisa_root_register (&eisa_bus_root)) {
|
/* A real bridge may have been registered before
|
* us. So quietly unregister. */
|
platform_device_unregister (&eisa_root_dev);
|
return -1;
|
}
|
|
return 0;
|
}
|
|
module_param (force_probe, int, 0444);
|
|
device_initcall (virtual_eisa_root_init);
|
