Loading...
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/of.h>
17#include <linux/of_device.h>
18#include <linux/of_platform.h>
19#include <linux/atomic.h>
20
21#include <asm/errno.h>
22#include <asm/topology.h>
23#include <asm/pci-bridge.h>
24#include <asm/ppc-pci.h>
25#include <asm/eeh.h>
26
27#ifdef CONFIG_PPC_OF_PLATFORM_PCI
28
29/* The probing of PCI controllers from of_platform is currently
30 * 64 bits only, mostly due to gratuitous differences between
31 * the 32 and 64 bits PCI code on PowerPC and the 32 bits one
32 * lacking some bits needed here.
33 */
34
35static int of_pci_phb_probe(struct platform_device *dev)
36{
37 struct pci_controller *phb;
38
39 /* Check if we can do that ... */
40 if (ppc_md.pci_setup_phb == NULL)
41 return -ENODEV;
42
43 pr_info("Setting up PCI bus %pOF\n", dev->dev.of_node);
44
45 /* Alloc and setup PHB data structure */
46 phb = pcibios_alloc_controller(dev->dev.of_node);
47 if (!phb)
48 return -ENODEV;
49
50 /* Setup parent in sysfs */
51 phb->parent = &dev->dev;
52
53 /* Setup the PHB using arch provided callback */
54 if (ppc_md.pci_setup_phb(phb)) {
55 pcibios_free_controller(phb);
56 return -ENODEV;
57 }
58
59 /* Process "ranges" property */
60 pci_process_bridge_OF_ranges(phb, dev->dev.of_node, 0);
61
62 /* Init pci_dn data structures */
63 pci_devs_phb_init_dynamic(phb);
64
65 /* Create EEH PE for the PHB */
66 eeh_phb_pe_create(phb);
67
68 /* Scan the bus */
69 pcibios_scan_phb(phb);
70 if (phb->bus == NULL)
71 return -ENXIO;
72
73 /* Claim resources. This might need some rework as well depending
74 * whether we are doing probe-only or not, like assigning unassigned
75 * resources etc...
76 */
77 pcibios_claim_one_bus(phb->bus);
78
79 /* Add probed PCI devices to the device model */
80 pci_bus_add_devices(phb->bus);
81
82 return 0;
83}
84
85static const struct of_device_id of_pci_phb_ids[] = {
86 { .type = "pci", },
87 { .type = "pcix", },
88 { .type = "pcie", },
89 { .type = "pciex", },
90 { .type = "ht", },
91 {}
92};
93
94static struct platform_driver of_pci_phb_driver = {
95 .probe = of_pci_phb_probe,
96 .driver = {
97 .name = "of-pci",
98 .of_match_table = of_pci_phb_ids,
99 },
100};
101
102builtin_platform_driver(of_pci_phb_driver);
103
104#endif /* CONFIG_PPC_OF_PLATFORM_PCI */
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 */