Commit | Line | Data |
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dcdb1674 JC |
1 | /* |
2 | * Derived from drm_pci.c | |
3 | * | |
4 | * Copyright 2003 José Fonseca. | |
5 | * Copyright 2003 Leif Delgass. | |
6 | * Copyright (c) 2009, Code Aurora Forum. | |
7 | * All Rights Reserved. | |
8 | * | |
9 | * Permission is hereby granted, free of charge, to any person obtaining a | |
10 | * copy of this software and associated documentation files (the "Software"), | |
11 | * to deal in the Software without restriction, including without limitation | |
12 | * the rights to use, copy, modify, merge, publish, distribute, sublicense, | |
13 | * and/or sell copies of the Software, and to permit persons to whom the | |
14 | * Software is furnished to do so, subject to the following conditions: | |
15 | * | |
16 | * The above copyright notice and this permission notice (including the next | |
17 | * paragraph) shall be included in all copies or substantial portions of the | |
18 | * Software. | |
19 | * | |
20 | * THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR | |
21 | * IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY, | |
22 | * FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL THE | |
23 | * AUTHORS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER LIABILITY, WHETHER IN AN | |
24 | * ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM, OUT OF OR IN CONNECTION | |
25 | * WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN THE SOFTWARE. | |
26 | */ | |
27 | ||
2d1a8a48 | 28 | #include <linux/export.h> |
760285e7 | 29 | #include <drm/drmP.h> |
dcdb1674 | 30 | |
66cc8b6b | 31 | /* |
dcdb1674 JC |
32 | * Register. |
33 | * | |
34 | * \param platdev - Platform device struture | |
35 | * \return zero on success or a negative number on failure. | |
36 | * | |
37 | * Attempt to gets inter module "drm" information. If we are first | |
38 | * then register the character device and inter module information. | |
39 | * Try and register, if we fail to register, backout previous work. | |
40 | */ | |
41 | ||
66cc8b6b LD |
42 | static int drm_get_platform_dev(struct platform_device *platdev, |
43 | struct drm_driver *driver) | |
dcdb1674 JC |
44 | { |
45 | struct drm_device *dev; | |
46 | int ret; | |
47 | ||
48 | DRM_DEBUG("\n"); | |
49 | ||
1bb72532 | 50 | dev = drm_dev_alloc(driver, &platdev->dev); |
dcdb1674 JC |
51 | if (!dev) |
52 | return -ENOMEM; | |
53 | ||
54 | dev->platformdev = platdev; | |
dcdb1674 | 55 | |
c22f0ace | 56 | ret = drm_dev_register(dev, 0); |
dcdb1674 | 57 | if (ret) |
c22f0ace | 58 | goto err_free; |
b64c115e | 59 | |
dcdb1674 JC |
60 | DRM_INFO("Initialized %s %d.%d.%d %s on minor %d\n", |
61 | driver->name, driver->major, driver->minor, driver->patchlevel, | |
62 | driver->date, dev->primary->index); | |
63 | ||
64 | return 0; | |
65 | ||
c22f0ace | 66 | err_free: |
099d1c29 | 67 | drm_dev_unref(dev); |
dcdb1674 JC |
68 | return ret; |
69 | } | |
dcdb1674 | 70 | |
8410ea3b DA |
71 | static int drm_platform_set_busid(struct drm_device *dev, struct drm_master *master) |
72 | { | |
b19c19af | 73 | int len, ret, id; |
8410ea3b | 74 | |
28a4a163 RC |
75 | master->unique_len = 13 + strlen(dev->platformdev->name); |
76 | master->unique_size = master->unique_len; | |
8410ea3b DA |
77 | master->unique = kmalloc(master->unique_len + 1, GFP_KERNEL); |
78 | ||
79 | if (master->unique == NULL) | |
80 | return -ENOMEM; | |
81 | ||
b19c19af RC |
82 | id = dev->platformdev->id; |
83 | ||
84 | /* if only a single instance of the platform device, id will be | |
85 | * set to -1.. use 0 instead to avoid a funny looking bus-id: | |
86 | */ | |
87 | if (id == -1) | |
88 | id = 0; | |
89 | ||
8410ea3b | 90 | len = snprintf(master->unique, master->unique_len, |
b19c19af | 91 | "platform:%s:%02d", dev->platformdev->name, id); |
8410ea3b DA |
92 | |
93 | if (len > master->unique_len) { | |
94 | DRM_ERROR("Unique buffer overflowed\n"); | |
95 | ret = -EINVAL; | |
96 | goto err; | |
97 | } | |
98 | ||
8410ea3b DA |
99 | return 0; |
100 | err: | |
101 | return ret; | |
102 | } | |
103 | ||
104 | static struct drm_bus drm_platform_bus = { | |
8410ea3b DA |
105 | .set_busid = drm_platform_set_busid, |
106 | }; | |
107 | ||
dcdb1674 | 108 | /** |
c6a1af8a TR |
109 | * drm_platform_init - Register a platform device with the DRM subsystem |
110 | * @driver: DRM device driver | |
111 | * @platform_device: platform device to register | |
dcdb1674 | 112 | * |
c6a1af8a TR |
113 | * Registers the specified DRM device driver and platform device with the DRM |
114 | * subsystem, initializing a drm_device structure and calling the driver's | |
115 | * .load() function. | |
dcdb1674 | 116 | * |
c6a1af8a | 117 | * Return: 0 on success or a negative error code on failure. |
dcdb1674 | 118 | */ |
8410ea3b | 119 | int drm_platform_init(struct drm_driver *driver, struct platform_device *platform_device) |
dcdb1674 | 120 | { |
8410ea3b DA |
121 | DRM_DEBUG("\n"); |
122 | ||
8410ea3b | 123 | driver->bus = &drm_platform_bus; |
8410ea3b DA |
124 | return drm_get_platform_dev(platform_device, driver); |
125 | } | |
126 | EXPORT_SYMBOL(drm_platform_init); |