1/*
 2 * Minimalist driver for a generic PCI-to-EISA bridge.
 3 *
 4 * (C) 2003 Marc Zyngier <maz@wild-wind.fr.eu.org>
 5 *
 6 * This code is released under the GPL version 2.
 7 *
 8 * Ivan Kokshaysky <ink@jurassic.park.msu.ru> :
 9 * Generalisation from i82375 to PCI_CLASS_BRIDGE_EISA.
10 */
11
12#include <linux/kernel.h>
13#include <linux/device.h>
14#include <linux/eisa.h>
15#include <linux/pci.h>
16#include <linux/module.h>
17#include <linux/init.h>
18
19/* There is only *one* pci_eisa device per machine, right ? */
20static struct eisa_root_device pci_eisa_root;
21
22static int __init pci_eisa_init(struct pci_dev *pdev,
23				const struct pci_device_id *ent)
24{
25	int rc;
 
26
27	if ((rc = pci_enable_device (pdev))) {
28		printk (KERN_ERR "pci_eisa : Could not enable device %s\n",
29			pci_name(pdev));
30		return rc;
31	}
32
33	pci_eisa_root.dev              = &pdev->dev;
34	pci_eisa_root.res	       = pdev->bus->resource[0];
35	pci_eisa_root.bus_base_addr    = pdev->bus->resource[0]->start;
36	pci_eisa_root.slots	       = EISA_MAX_SLOTS;
37	pci_eisa_root.dma_mask         = pdev->dma_mask;
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
38	dev_set_drvdata(pci_eisa_root.dev, &pci_eisa_root);
39
40	if (eisa_root_register (&pci_eisa_root)) {
41		printk (KERN_ERR "pci_eisa : Could not register EISA root\n");
42		return -1;
43	}
44
45	return 0;
46}
47
48static struct pci_device_id pci_eisa_pci_tbl[] = {
49	{ PCI_ANY_ID, PCI_ANY_ID, PCI_ANY_ID, PCI_ANY_ID,
50	  PCI_CLASS_BRIDGE_EISA << 8, 0xffff00, 0 },
51	{ 0, }
52};
53
54static struct pci_driver __refdata pci_eisa_driver = {
55	.name		= "pci_eisa",
56	.id_table	= pci_eisa_pci_tbl,
57	.probe		= pci_eisa_init,
58};
59
60static int __init pci_eisa_init_module (void)
61{
62	return pci_register_driver (&pci_eisa_driver);
63}
64
65device_initcall(pci_eisa_init_module);
66MODULE_DEVICE_TABLE(pci, pci_eisa_pci_tbl);
 
 
 
 
 
 
 
 

 1// SPDX-License-Identifier: GPL-2.0-only
 2/*
 3 * Minimalist driver for a generic PCI-to-EISA bridge.
 4 *
 5 * (C) 2003 Marc Zyngier <maz@wild-wind.fr.eu.org>
 6 *
 
 
 7 * Ivan Kokshaysky <ink@jurassic.park.msu.ru> :
 8 * Generalisation from i82375 to PCI_CLASS_BRIDGE_EISA.
 9 */
10
11#include <linux/kernel.h>
12#include <linux/device.h>
13#include <linux/eisa.h>
14#include <linux/pci.h>
15#include <linux/module.h>
16#include <linux/init.h>
17
18/* There is only *one* pci_eisa device per machine, right ? */
19static struct eisa_root_device pci_eisa_root;
20
21static int __init pci_eisa_init(struct pci_dev *pdev)
 
22{
23	int rc, i;
24	struct resource *res, *bus_res = NULL;
25
26	if ((rc = pci_enable_device (pdev))) {
27		dev_err(&pdev->dev, "Could not enable device\n");
 
28		return rc;
29	}
30
31	/*
32	 * The Intel 82375 PCI-EISA bridge is a subtractive-decode PCI
33	 * device, so the resources available on EISA are the same as those
34	 * available on the 82375 bus.  This works the same as a PCI-PCI
35	 * bridge in subtractive-decode mode (see pci_read_bridge_bases()).
36	 * We assume other PCI-EISA bridges are similar.
37	 *
38	 * eisa_root_register() can only deal with a single io port resource,
39	*  so we use the first valid io port resource.
40	 */
41	pci_bus_for_each_resource(pdev->bus, res, i)
42		if (res && (res->flags & IORESOURCE_IO)) {
43			bus_res = res;
44			break;
45		}
46
47	if (!bus_res) {
48		dev_err(&pdev->dev, "No resources available\n");
49		return -1;
50	}
51
52	pci_eisa_root.dev		= &pdev->dev;
53	pci_eisa_root.res		= bus_res;
54	pci_eisa_root.bus_base_addr	= bus_res->start;
55	pci_eisa_root.slots		= EISA_MAX_SLOTS;
56	pci_eisa_root.dma_mask		= pdev->dma_mask;
57	dev_set_drvdata(pci_eisa_root.dev, &pci_eisa_root);
58
59	if (eisa_root_register (&pci_eisa_root)) {
60		dev_err(&pdev->dev, "Could not register EISA root\n");
61		return -1;
62	}
63
64	return 0;
65}
66
67/*
68 * We have to call pci_eisa_init_early() before pnpacpi_init()/isapnp_init().
69 *   Otherwise pnp resource will get enabled early and could prevent eisa
70 *   to be initialized.
71 * Also need to make sure pci_eisa_init_early() is called after
72 * x86/pci_subsys_init().
73 * So need to use subsys_initcall_sync with it.
74 */
75static int __init pci_eisa_init_early(void)
 
 
 
 
76{
77	struct pci_dev *dev = NULL;
78	int ret;
79
80	for_each_pci_dev(dev)
81		if ((dev->class >> 8) == PCI_CLASS_BRIDGE_EISA) {
82			ret = pci_eisa_init(dev);
83			if (ret)
84				return ret;
85		}
86
87	return 0;
88}
89subsys_initcall_sync(pci_eisa_init_early);