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d2912cb1 | 1 | // SPDX-License-Identifier: GPL-2.0-only |
91e56878 MW |
2 | /* |
3 | * ACPI support for platform bus type. | |
4 | * | |
5 | * Copyright (C) 2012, Intel Corporation | |
6 | * Authors: Mika Westerberg <mika.westerberg@linux.intel.com> | |
7 | * Mathias Nyman <mathias.nyman@linux.intel.com> | |
8 | * Rafael J. Wysocki <rafael.j.wysocki@intel.com> | |
91e56878 MW |
9 | */ |
10 | ||
11 | #include <linux/acpi.h> | |
12 | #include <linux/device.h> | |
e375325c | 13 | #include <linux/err.h> |
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14 | #include <linux/kernel.h> |
15 | #include <linux/module.h> | |
8a2f38dd | 16 | #include <linux/dma-mapping.h> |
a252d881 | 17 | #include <linux/pci.h> |
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18 | #include <linux/platform_device.h> |
19 | ||
5923f986 AS |
20 | #include "internal.h" |
21 | ||
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22 | ACPI_MODULE_NAME("platform"); |
23 | ||
48459340 | 24 | static const struct acpi_device_id forbidden_id_list[] = { |
08f63d97 JR |
25 | {"PNP0000", 0}, /* PIC */ |
26 | {"PNP0100", 0}, /* Timer */ | |
27 | {"PNP0200", 0}, /* AT DMA Controller */ | |
28 | {"ACPI0009", 0}, /* IOxAPIC */ | |
29 | {"ACPI000A", 0}, /* IOAPIC */ | |
2bbb5fa3 | 30 | {"SMB0001", 0}, /* ACPI SMBUS virtual device */ |
48459340 | 31 | {"", 0}, |
141a297b RW |
32 | }; |
33 | ||
a252d881 MW |
34 | static void acpi_platform_fill_resource(struct acpi_device *adev, |
35 | const struct resource *src, struct resource *dest) | |
36 | { | |
37 | struct device *parent; | |
38 | ||
39 | *dest = *src; | |
40 | ||
41 | /* | |
42 | * If the device has parent we need to take its resources into | |
43 | * account as well because this device might consume part of those. | |
44 | */ | |
45 | parent = acpi_get_first_physical_node(adev->parent); | |
46 | if (parent && dev_is_pci(parent)) | |
47 | dest->parent = pci_find_resource(to_pci_dev(parent), dest); | |
48 | } | |
49 | ||
91e56878 MW |
50 | /** |
51 | * acpi_create_platform_device - Create platform device for ACPI device node | |
52 | * @adev: ACPI device node to create a platform device for. | |
1571875b | 53 | * @properties: Optional collection of build-in properties. |
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54 | * |
55 | * Check if the given @adev can be represented as a platform device and, if | |
56 | * that's the case, create and register a platform device, populate its common | |
57 | * resources and returns a pointer to it. Otherwise, return %NULL. | |
58 | * | |
7eaa2800 | 59 | * Name of the platform device will be the same as @adev's. |
91e56878 | 60 | */ |
1571875b HK |
61 | struct platform_device *acpi_create_platform_device(struct acpi_device *adev, |
62 | struct property_entry *properties) | |
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63 | { |
64 | struct platform_device *pdev = NULL; | |
863f9f30 | 65 | struct platform_device_info pdevinfo; |
90e97820 | 66 | struct resource_entry *rentry; |
8e345c99 | 67 | struct list_head resource_list; |
62eb4b07 | 68 | struct resource *resources = NULL; |
8e345c99 | 69 | int count; |
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70 | |
71 | /* If the ACPI node already has a physical device attached, skip it. */ | |
72 | if (adev->physical_node_count) | |
8ce62f85 | 73 | return NULL; |
91e56878 | 74 | |
48459340 ZR |
75 | if (!acpi_match_device_ids(adev, forbidden_id_list)) |
76 | return ERR_PTR(-EINVAL); | |
77 | ||
8e345c99 RW |
78 | INIT_LIST_HEAD(&resource_list); |
79 | count = acpi_dev_get_resources(adev, &resource_list, NULL, NULL); | |
d2fe7251 | 80 | if (count < 0) { |
8ce62f85 | 81 | return NULL; |
d2fe7251 | 82 | } else if (count > 0) { |
6396bb22 | 83 | resources = kcalloc(count, sizeof(struct resource), |
d2fe7251 RW |
84 | GFP_KERNEL); |
85 | if (!resources) { | |
86 | dev_err(&adev->dev, "No memory for resources\n"); | |
87 | acpi_dev_free_resource_list(&resource_list); | |
8ce62f85 | 88 | return ERR_PTR(-ENOMEM); |
d2fe7251 RW |
89 | } |
90 | count = 0; | |
91 | list_for_each_entry(rentry, &resource_list, node) | |
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92 | acpi_platform_fill_resource(adev, rentry->res, |
93 | &resources[count++]); | |
91e56878 | 94 | |
8e345c99 | 95 | acpi_dev_free_resource_list(&resource_list); |
91e56878 | 96 | } |
91e56878 | 97 | |
863f9f30 | 98 | memset(&pdevinfo, 0, sizeof(pdevinfo)); |
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99 | /* |
100 | * If the ACPI node has a parent and that parent has a physical device | |
101 | * attached to it, that physical device should be the parent of the | |
102 | * platform device we are about to create. | |
103 | */ | |
3b95bd16 AM |
104 | pdevinfo.parent = adev->parent ? |
105 | acpi_get_first_physical_node(adev->parent) : NULL; | |
863f9f30 RW |
106 | pdevinfo.name = dev_name(&adev->dev); |
107 | pdevinfo.id = -1; | |
108 | pdevinfo.res = resources; | |
109 | pdevinfo.num_res = count; | |
ce793486 | 110 | pdevinfo.fwnode = acpi_fwnode_handle(adev); |
1571875b | 111 | pdevinfo.properties = properties; |
1831eff8 SS |
112 | |
113 | if (acpi_dma_supported(adev)) | |
114 | pdevinfo.dma_mask = DMA_BIT_MASK(32); | |
115 | else | |
116 | pdevinfo.dma_mask = 0; | |
117 | ||
863f9f30 | 118 | pdev = platform_device_register_full(&pdevinfo); |
8ce62f85 | 119 | if (IS_ERR(pdev)) |
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120 | dev_err(&adev->dev, "platform device creation failed: %ld\n", |
121 | PTR_ERR(pdev)); | |
79f97c30 SD |
122 | else { |
123 | set_dev_node(&pdev->dev, acpi_get_node(adev->handle)); | |
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124 | dev_dbg(&adev->dev, "created platform device %s\n", |
125 | dev_name(&pdev->dev)); | |
79f97c30 | 126 | } |
91e56878 | 127 | |
8e345c99 | 128 | kfree(resources); |
79f97c30 | 129 | |
8ce62f85 RW |
130 | return pdev; |
131 | } | |
083bf668 | 132 | EXPORT_SYMBOL_GPL(acpi_create_platform_device); |