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 | ||
28 | #include "drmP.h" | |
29 | ||
30 | /** | |
31 | * Register. | |
32 | * | |
33 | * \param platdev - Platform device struture | |
34 | * \return zero on success or a negative number on failure. | |
35 | * | |
36 | * Attempt to gets inter module "drm" information. If we are first | |
37 | * then register the character device and inter module information. | |
38 | * Try and register, if we fail to register, backout previous work. | |
39 | */ | |
40 | ||
41 | int drm_get_platform_dev(struct platform_device *platdev, | |
42 | struct drm_driver *driver) | |
43 | { | |
44 | struct drm_device *dev; | |
45 | int ret; | |
46 | ||
47 | DRM_DEBUG("\n"); | |
48 | ||
49 | dev = kzalloc(sizeof(*dev), GFP_KERNEL); | |
50 | if (!dev) | |
51 | return -ENOMEM; | |
52 | ||
53 | dev->platformdev = platdev; | |
54 | dev->dev = &platdev->dev; | |
55 | ||
b64c115e DA |
56 | mutex_lock(&drm_global_mutex); |
57 | ||
dcdb1674 JC |
58 | ret = drm_fill_in_dev(dev, NULL, driver); |
59 | ||
60 | if (ret) { | |
61 | printk(KERN_ERR "DRM: Fill_in_dev failed.\n"); | |
62 | goto err_g1; | |
63 | } | |
64 | ||
65 | if (drm_core_check_feature(dev, DRIVER_MODESET)) { | |
66 | dev_set_drvdata(&platdev->dev, dev); | |
67 | ret = drm_get_minor(dev, &dev->control, DRM_MINOR_CONTROL); | |
68 | if (ret) | |
69 | goto err_g1; | |
70 | } | |
71 | ||
72 | ret = drm_get_minor(dev, &dev->primary, DRM_MINOR_LEGACY); | |
73 | if (ret) | |
74 | goto err_g2; | |
75 | ||
76 | if (dev->driver->load) { | |
77 | ret = dev->driver->load(dev, 0); | |
78 | if (ret) | |
79 | goto err_g3; | |
80 | } | |
81 | ||
82 | /* setup the grouping for the legacy output */ | |
83 | if (drm_core_check_feature(dev, DRIVER_MODESET)) { | |
84 | ret = drm_mode_group_init_legacy_group(dev, | |
85 | &dev->primary->mode_group); | |
86 | if (ret) | |
87 | goto err_g3; | |
88 | } | |
89 | ||
90 | list_add_tail(&dev->driver_item, &driver->device_list); | |
91 | ||
b64c115e DA |
92 | mutex_unlock(&drm_global_mutex); |
93 | ||
dcdb1674 JC |
94 | DRM_INFO("Initialized %s %d.%d.%d %s on minor %d\n", |
95 | driver->name, driver->major, driver->minor, driver->patchlevel, | |
96 | driver->date, dev->primary->index); | |
97 | ||
98 | return 0; | |
99 | ||
100 | err_g3: | |
101 | drm_put_minor(&dev->primary); | |
102 | err_g2: | |
103 | if (drm_core_check_feature(dev, DRIVER_MODESET)) | |
104 | drm_put_minor(&dev->control); | |
105 | err_g1: | |
106 | kfree(dev); | |
b64c115e | 107 | mutex_unlock(&drm_global_mutex); |
dcdb1674 JC |
108 | return ret; |
109 | } | |
110 | EXPORT_SYMBOL(drm_get_platform_dev); | |
111 | ||
8410ea3b DA |
112 | static int drm_platform_get_irq(struct drm_device *dev) |
113 | { | |
114 | return platform_get_irq(dev->platformdev, 0); | |
115 | } | |
116 | ||
117 | static const char *drm_platform_get_name(struct drm_device *dev) | |
118 | { | |
119 | return dev->platformdev->name; | |
120 | } | |
121 | ||
122 | static int drm_platform_set_busid(struct drm_device *dev, struct drm_master *master) | |
123 | { | |
124 | int len, ret; | |
125 | ||
28a4a163 RC |
126 | master->unique_len = 13 + strlen(dev->platformdev->name); |
127 | master->unique_size = master->unique_len; | |
8410ea3b DA |
128 | master->unique = kmalloc(master->unique_len + 1, GFP_KERNEL); |
129 | ||
130 | if (master->unique == NULL) | |
131 | return -ENOMEM; | |
132 | ||
133 | len = snprintf(master->unique, master->unique_len, | |
28a4a163 | 134 | "platform:%s:%02d", dev->platformdev->name, dev->platformdev->id); |
8410ea3b DA |
135 | |
136 | if (len > master->unique_len) { | |
137 | DRM_ERROR("Unique buffer overflowed\n"); | |
138 | ret = -EINVAL; | |
139 | goto err; | |
140 | } | |
141 | ||
142 | dev->devname = | |
143 | kmalloc(strlen(dev->platformdev->name) + | |
144 | master->unique_len + 2, GFP_KERNEL); | |
145 | ||
146 | if (dev->devname == NULL) { | |
147 | ret = -ENOMEM; | |
148 | goto err; | |
149 | } | |
150 | ||
151 | sprintf(dev->devname, "%s@%s", dev->platformdev->name, | |
152 | master->unique); | |
153 | return 0; | |
154 | err: | |
155 | return ret; | |
156 | } | |
157 | ||
158 | static struct drm_bus drm_platform_bus = { | |
159 | .bus_type = DRIVER_BUS_PLATFORM, | |
160 | .get_irq = drm_platform_get_irq, | |
161 | .get_name = drm_platform_get_name, | |
162 | .set_busid = drm_platform_set_busid, | |
163 | }; | |
164 | ||
dcdb1674 | 165 | /** |
8410ea3b | 166 | * Platform device initialization. Called direct from modules. |
dcdb1674 JC |
167 | * |
168 | * \return zero on success or a negative number on failure. | |
169 | * | |
170 | * Initializes a drm_device structures,registering the | |
171 | * stubs | |
172 | * | |
173 | * Expands the \c DRIVER_PREINIT and \c DRIVER_POST_INIT macros before and | |
174 | * after the initialization for driver customization. | |
175 | */ | |
176 | ||
8410ea3b | 177 | int drm_platform_init(struct drm_driver *driver, struct platform_device *platform_device) |
dcdb1674 | 178 | { |
8410ea3b DA |
179 | DRM_DEBUG("\n"); |
180 | ||
181 | driver->kdriver.platform_device = platform_device; | |
182 | driver->bus = &drm_platform_bus; | |
183 | INIT_LIST_HEAD(&driver->device_list); | |
184 | return drm_get_platform_dev(platform_device, driver); | |
185 | } | |
186 | EXPORT_SYMBOL(drm_platform_init); | |
187 | ||
188 | void drm_platform_exit(struct drm_driver *driver, struct platform_device *platform_device) | |
189 | { | |
190 | struct drm_device *dev, *tmp; | |
191 | DRM_DEBUG("\n"); | |
192 | ||
193 | list_for_each_entry_safe(dev, tmp, &driver->device_list, driver_item) | |
194 | drm_put_dev(dev); | |
195 | DRM_INFO("Module unloaded\n"); | |
dcdb1674 | 196 | } |
8410ea3b | 197 | EXPORT_SYMBOL(drm_platform_exit); |