2 * Derived from drm_pci.c
4 * Copyright 2003 José Fonseca.
5 * Copyright 2003 Leif Delgass.
6 * Copyright (c) 2009, Code Aurora Forum.
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:
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
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.
28 #include <linux/export.h>
34 * \param platdev - Platform device struture
35 * \return zero on success or a negative number on failure.
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.
42 int drm_get_platform_dev(struct platform_device *platdev,
43 struct drm_driver *driver)
45 struct drm_device *dev;
50 dev = kzalloc(sizeof(*dev), GFP_KERNEL);
54 dev->platformdev = platdev;
55 dev->dev = &platdev->dev;
57 mutex_lock(&drm_global_mutex);
59 ret = drm_fill_in_dev(dev, NULL, driver);
62 printk(KERN_ERR "DRM: Fill_in_dev failed.\n");
66 if (drm_core_check_feature(dev, DRIVER_MODESET)) {
67 ret = drm_get_minor(dev, &dev->control, DRM_MINOR_CONTROL);
72 ret = drm_get_minor(dev, &dev->primary, DRM_MINOR_LEGACY);
76 if (dev->driver->load) {
77 ret = dev->driver->load(dev, 0);
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);
90 list_add_tail(&dev->driver_item, &driver->device_list);
92 mutex_unlock(&drm_global_mutex);
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);
101 drm_put_minor(&dev->primary);
103 if (drm_core_check_feature(dev, DRIVER_MODESET))
104 drm_put_minor(&dev->control);
107 mutex_unlock(&drm_global_mutex);
110 EXPORT_SYMBOL(drm_get_platform_dev);
112 static int drm_platform_get_irq(struct drm_device *dev)
114 return platform_get_irq(dev->platformdev, 0);
117 static const char *drm_platform_get_name(struct drm_device *dev)
119 return dev->platformdev->name;
122 static int drm_platform_set_busid(struct drm_device *dev, struct drm_master *master)
126 master->unique_len = 13 + strlen(dev->platformdev->name);
127 master->unique_size = master->unique_len;
128 master->unique = kmalloc(master->unique_len + 1, GFP_KERNEL);
130 if (master->unique == NULL)
133 id = dev->platformdev->id;
135 /* if only a single instance of the platform device, id will be
136 * set to -1.. use 0 instead to avoid a funny looking bus-id:
141 len = snprintf(master->unique, master->unique_len,
142 "platform:%s:%02d", dev->platformdev->name, id);
144 if (len > master->unique_len) {
145 DRM_ERROR("Unique buffer overflowed\n");
151 kmalloc(strlen(dev->platformdev->name) +
152 master->unique_len + 2, GFP_KERNEL);
154 if (dev->devname == NULL) {
159 sprintf(dev->devname, "%s@%s", dev->platformdev->name,
166 static struct drm_bus drm_platform_bus = {
167 .bus_type = DRIVER_BUS_PLATFORM,
168 .get_irq = drm_platform_get_irq,
169 .get_name = drm_platform_get_name,
170 .set_busid = drm_platform_set_busid,
174 * Platform device initialization. Called direct from modules.
176 * \return zero on success or a negative number on failure.
178 * Initializes a drm_device structures,registering the
181 * Expands the \c DRIVER_PREINIT and \c DRIVER_POST_INIT macros before and
182 * after the initialization for driver customization.
185 int drm_platform_init(struct drm_driver *driver, struct platform_device *platform_device)
189 driver->kdriver.platform_device = platform_device;
190 driver->bus = &drm_platform_bus;
191 INIT_LIST_HEAD(&driver->device_list);
192 return drm_get_platform_dev(platform_device, driver);
194 EXPORT_SYMBOL(drm_platform_init);
196 void drm_platform_exit(struct drm_driver *driver, struct platform_device *platform_device)
198 struct drm_device *dev, *tmp;
201 list_for_each_entry_safe(dev, tmp, &driver->device_list, driver_item)
203 DRM_INFO("Module unloaded\n");
205 EXPORT_SYMBOL(drm_platform_exit);