1// SPDX-License-Identifier: GPL-2.0-only
 2/*
 3 * Virtual EISA root driver.
 4 * Acts as a placeholder if we don't have a proper EISA bridge.
 5 *
 6 * (C) 2003 Marc Zyngier <maz@wild-wind.fr.eu.org>
 7 */
 8
 9#include <linux/kernel.h>
10#include <linux/platform_device.h>
11#include <linux/eisa.h>
12#include <linux/module.h>
13#include <linux/moduleparam.h>
14#include <linux/init.h>
15
16#if defined(CONFIG_EISA_VLB_PRIMING)
17#define EISA_FORCE_PROBE_DEFAULT 1
18#else
19#define EISA_FORCE_PROBE_DEFAULT 0
20#endif
21
22static int force_probe = EISA_FORCE_PROBE_DEFAULT;
23static void virtual_eisa_release (struct device *);
24
25/* The default EISA device parent (virtual root device).
26 * Now use a platform device, since that's the obvious choice. */
27
28static struct platform_device eisa_root_dev = {
29	.name = "eisa",
30	.id   = 0,
31	.dev  = {
32		.release = virtual_eisa_release,
33	},
34};
35
36static struct eisa_root_device eisa_bus_root = {
37	.dev		= &eisa_root_dev.dev,
38	.bus_base_addr	= 0,
39	.res		= &ioport_resource,
40	.slots		= EISA_MAX_SLOTS,
41	.dma_mask	= 0xffffffff,
42};
43
44static void virtual_eisa_release (struct device *dev)
45{
46	/* nothing really to do here */
47}
48
49static int __init virtual_eisa_root_init (void)
50{
51	int r;
52
53	if ((r = platform_device_register (&eisa_root_dev)))
54		return r;
55
56	eisa_bus_root.force_probe = force_probe;
57
58	dev_set_drvdata(&eisa_root_dev.dev, &eisa_bus_root);
59
60	if (eisa_root_register (&eisa_bus_root)) {
61		/* A real bridge may have been registered before
62		 * us. So quietly unregister. */
63		platform_device_unregister (&eisa_root_dev);
64		return -1;
65	}
66
67	return 0;
68}
69
70module_param (force_probe, int, 0444);
71
72device_initcall (virtual_eisa_root_init);

 1// SPDX-License-Identifier: GPL-2.0-only
 2/*
 3 * Virtual EISA root driver.
 4 * Acts as a placeholder if we don't have a proper EISA bridge.
 5 *
 6 * (C) 2003 Marc Zyngier <maz@wild-wind.fr.eu.org>
 7 */
 8
 9#include <linux/kernel.h>
10#include <linux/platform_device.h>
11#include <linux/eisa.h>
12#include <linux/module.h>
13#include <linux/moduleparam.h>
14#include <linux/init.h>
15
16#if defined(CONFIG_ALPHA_JENSEN) || defined(CONFIG_EISA_VLB_PRIMING)
17#define EISA_FORCE_PROBE_DEFAULT 1
18#else
19#define EISA_FORCE_PROBE_DEFAULT 0
20#endif
21
22static int force_probe = EISA_FORCE_PROBE_DEFAULT;
23static void virtual_eisa_release (struct device *);
24
25/* The default EISA device parent (virtual root device).
26 * Now use a platform device, since that's the obvious choice. */
27
28static struct platform_device eisa_root_dev = {
29	.name = "eisa",
30	.id   = 0,
31	.dev  = {
32		.release = virtual_eisa_release,
33	},
34};
35
36static struct eisa_root_device eisa_bus_root = {
37	.dev		= &eisa_root_dev.dev,
38	.bus_base_addr	= 0,
39	.res		= &ioport_resource,
40	.slots		= EISA_MAX_SLOTS,
41	.dma_mask	= 0xffffffff,
42};
43
44static void virtual_eisa_release (struct device *dev)
45{
46	/* nothing really to do here */
47}
48
49static int __init virtual_eisa_root_init (void)
50{
51	int r;
52
53	if ((r = platform_device_register (&eisa_root_dev)))
54		return r;
55
56	eisa_bus_root.force_probe = force_probe;
57
58	dev_set_drvdata(&eisa_root_dev.dev, &eisa_bus_root);
59
60	if (eisa_root_register (&eisa_bus_root)) {
61		/* A real bridge may have been registered before
62		 * us. So quietly unregister. */
63		platform_device_unregister (&eisa_root_dev);
64		return -1;
65	}
66
67	return 0;
68}
69
70module_param (force_probe, int, 0444);
71
72device_initcall (virtual_eisa_root_init);