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1// SPDX-License-Identifier: GPL-2.0-or-later
2/*
3 * Copyright (C) 2006 Benjamin Herrenschmidt, IBM Corp.
4 * <benh@kernel.crashing.org>
5 * and Arnd Bergmann, IBM Corp.
6 */
7
8#undef DEBUG
9
10#include <linux/string.h>
11#include <linux/kernel.h>
12#include <linux/init.h>
13#include <linux/export.h>
14#include <linux/mod_devicetable.h>
15#include <linux/pci.h>
16#include <linux/platform_device.h>
17#include <linux/atomic.h>
18
19#include <asm/errno.h>
20#include <asm/topology.h>
21#include <asm/pci-bridge.h>
22#include <asm/ppc-pci.h>
23#include <asm/eeh.h>
24
25#ifdef CONFIG_PPC_OF_PLATFORM_PCI
26
27/* The probing of PCI controllers from of_platform is currently
28 * 64 bits only, mostly due to gratuitous differences between
29 * the 32 and 64 bits PCI code on PowerPC and the 32 bits one
30 * lacking some bits needed here.
31 */
32
33static int of_pci_phb_probe(struct platform_device *dev)
34{
35 struct pci_controller *phb;
36
37 /* Check if we can do that ... */
38 if (ppc_md.pci_setup_phb == NULL)
39 return -ENODEV;
40
41 pr_info("Setting up PCI bus %pOF\n", dev->dev.of_node);
42
43 /* Alloc and setup PHB data structure */
44 phb = pcibios_alloc_controller(dev->dev.of_node);
45 if (!phb)
46 return -ENODEV;
47
48 /* Setup parent in sysfs */
49 phb->parent = &dev->dev;
50
51 /* Setup the PHB using arch provided callback */
52 if (ppc_md.pci_setup_phb(phb)) {
53 pcibios_free_controller(phb);
54 return -ENODEV;
55 }
56
57 /* Process "ranges" property */
58 pci_process_bridge_OF_ranges(phb, dev->dev.of_node, 0);
59
60 /* Init pci_dn data structures */
61 pci_devs_phb_init_dynamic(phb);
62
63 /* Create EEH PE for the PHB */
64 eeh_phb_pe_create(phb);
65
66 /* Scan the bus */
67 pcibios_scan_phb(phb);
68 if (phb->bus == NULL)
69 return -ENXIO;
70
71 /* Claim resources. This might need some rework as well depending
72 * whether we are doing probe-only or not, like assigning unassigned
73 * resources etc...
74 */
75 pcibios_claim_one_bus(phb->bus);
76
77 /* Add probed PCI devices to the device model */
78 pci_bus_add_devices(phb->bus);
79
80 return 0;
81}
82
83static const struct of_device_id of_pci_phb_ids[] = {
84 { .type = "pci", },
85 { .type = "pcix", },
86 { .type = "pcie", },
87 { .type = "pciex", },
88 { .type = "ht", },
89 {}
90};
91
92static struct platform_driver of_pci_phb_driver = {
93 .probe = of_pci_phb_probe,
94 .driver = {
95 .name = "of-pci",
96 .of_match_table = of_pci_phb_ids,
97 },
98};
99
100builtin_platform_driver(of_pci_phb_driver);
101
102#endif /* CONFIG_PPC_OF_PLATFORM_PCI */
1/*
2 * Copyright (C) 2006 Benjamin Herrenschmidt, IBM Corp.
3 * <benh@kernel.crashing.org>
4 * and Arnd Bergmann, IBM Corp.
5 *
6 * This program is free software; you can redistribute it and/or
7 * modify it under the terms of the GNU General Public License
8 * as published by the Free Software Foundation; either version
9 * 2 of the License, or (at your option) any later version.
10 *
11 */
12
13#undef DEBUG
14
15#include <linux/string.h>
16#include <linux/kernel.h>
17#include <linux/init.h>
18#include <linux/module.h>
19#include <linux/mod_devicetable.h>
20#include <linux/pci.h>
21#include <linux/of.h>
22#include <linux/of_device.h>
23#include <linux/of_platform.h>
24
25#include <asm/errno.h>
26#include <asm/topology.h>
27#include <asm/pci-bridge.h>
28#include <asm/ppc-pci.h>
29#include <linux/atomic.h>
30
31#ifdef CONFIG_PPC_OF_PLATFORM_PCI
32
33/* The probing of PCI controllers from of_platform is currently
34 * 64 bits only, mostly due to gratuitous differences between
35 * the 32 and 64 bits PCI code on PowerPC and the 32 bits one
36 * lacking some bits needed here.
37 */
38
39static int __devinit of_pci_phb_probe(struct platform_device *dev)
40{
41 struct pci_controller *phb;
42
43 /* Check if we can do that ... */
44 if (ppc_md.pci_setup_phb == NULL)
45 return -ENODEV;
46
47 pr_info("Setting up PCI bus %s\n", dev->dev.of_node->full_name);
48
49 /* Alloc and setup PHB data structure */
50 phb = pcibios_alloc_controller(dev->dev.of_node);
51 if (!phb)
52 return -ENODEV;
53
54 /* Setup parent in sysfs */
55 phb->parent = &dev->dev;
56
57 /* Setup the PHB using arch provided callback */
58 if (ppc_md.pci_setup_phb(phb)) {
59 pcibios_free_controller(phb);
60 return -ENODEV;
61 }
62
63 /* Process "ranges" property */
64 pci_process_bridge_OF_ranges(phb, dev->dev.of_node, 0);
65
66 /* Init pci_dn data structures */
67 pci_devs_phb_init_dynamic(phb);
68
69 /* Register devices with EEH */
70#ifdef CONFIG_EEH
71 if (dev->dev.of_node->child)
72 eeh_add_device_tree_early(dev->dev.of_node);
73#endif /* CONFIG_EEH */
74
75 /* Scan the bus */
76 pcibios_scan_phb(phb);
77 if (phb->bus == NULL)
78 return -ENXIO;
79
80 /* Claim resources. This might need some rework as well depending
81 * wether we are doing probe-only or not, like assigning unassigned
82 * resources etc...
83 */
84 pcibios_claim_one_bus(phb->bus);
85
86 /* Finish EEH setup */
87#ifdef CONFIG_EEH
88 eeh_add_device_tree_late(phb->bus);
89#endif
90
91 /* Add probed PCI devices to the device model */
92 pci_bus_add_devices(phb->bus);
93
94 return 0;
95}
96
97static struct of_device_id of_pci_phb_ids[] = {
98 { .type = "pci", },
99 { .type = "pcix", },
100 { .type = "pcie", },
101 { .type = "pciex", },
102 { .type = "ht", },
103 {}
104};
105
106static struct platform_driver of_pci_phb_driver = {
107 .probe = of_pci_phb_probe,
108 .driver = {
109 .name = "of-pci",
110 .owner = THIS_MODULE,
111 .of_match_table = of_pci_phb_ids,
112 },
113};
114
115static __init int of_pci_phb_init(void)
116{
117 return platform_driver_register(&of_pci_phb_driver);
118}
119
120device_initcall(of_pci_phb_init);
121
122#endif /* CONFIG_PPC_OF_PLATFORM_PCI */