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 static 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 if (drm_core_check_feature(dev
, DRIVER_RENDER
) && drm_rnodes
) {
73 ret
= drm_get_minor(dev
, &dev
->render
, DRM_MINOR_RENDER
);
78 ret
= drm_get_minor(dev
, &dev
->primary
, DRM_MINOR_LEGACY
);
82 if (dev
->driver
->load
) {
83 ret
= dev
->driver
->load(dev
, 0);
88 /* setup the grouping for the legacy output */
89 if (drm_core_check_feature(dev
, DRIVER_MODESET
)) {
90 ret
= drm_mode_group_init_legacy_group(dev
,
91 &dev
->primary
->mode_group
);
96 list_add_tail(&dev
->driver_item
, &driver
->device_list
);
98 mutex_unlock(&drm_global_mutex
);
100 DRM_INFO("Initialized %s %d.%d.%d %s on minor %d\n",
101 driver
->name
, driver
->major
, driver
->minor
, driver
->patchlevel
,
102 driver
->date
, dev
->primary
->index
);
107 drm_put_minor(&dev
->primary
);
110 drm_put_minor(&dev
->render
);
112 if (drm_core_check_feature(dev
, DRIVER_MODESET
))
113 drm_put_minor(&dev
->control
);
116 mutex_unlock(&drm_global_mutex
);
120 static int drm_platform_get_irq(struct drm_device
*dev
)
122 return platform_get_irq(dev
->platformdev
, 0);
125 static const char *drm_platform_get_name(struct drm_device
*dev
)
127 return dev
->platformdev
->name
;
130 static int drm_platform_set_busid(struct drm_device
*dev
, struct drm_master
*master
)
134 master
->unique_len
= 13 + strlen(dev
->platformdev
->name
);
135 master
->unique_size
= master
->unique_len
;
136 master
->unique
= kmalloc(master
->unique_len
+ 1, GFP_KERNEL
);
138 if (master
->unique
== NULL
)
141 id
= dev
->platformdev
->id
;
143 /* if only a single instance of the platform device, id will be
144 * set to -1.. use 0 instead to avoid a funny looking bus-id:
149 len
= snprintf(master
->unique
, master
->unique_len
,
150 "platform:%s:%02d", dev
->platformdev
->name
, id
);
152 if (len
> master
->unique_len
) {
153 DRM_ERROR("Unique buffer overflowed\n");
159 kmalloc(strlen(dev
->platformdev
->name
) +
160 master
->unique_len
+ 2, GFP_KERNEL
);
162 if (dev
->devname
== NULL
) {
167 sprintf(dev
->devname
, "%s@%s", dev
->platformdev
->name
,
174 static struct drm_bus drm_platform_bus
= {
175 .bus_type
= DRIVER_BUS_PLATFORM
,
176 .get_irq
= drm_platform_get_irq
,
177 .get_name
= drm_platform_get_name
,
178 .set_busid
= drm_platform_set_busid
,
182 * Platform device initialization. Called direct from modules.
184 * \return zero on success or a negative number on failure.
186 * Initializes a drm_device structures,registering the
189 * Expands the \c DRIVER_PREINIT and \c DRIVER_POST_INIT macros before and
190 * after the initialization for driver customization.
193 int drm_platform_init(struct drm_driver
*driver
, struct platform_device
*platform_device
)
197 driver
->kdriver
.platform_device
= platform_device
;
198 driver
->bus
= &drm_platform_bus
;
199 INIT_LIST_HEAD(&driver
->device_list
);
200 return drm_get_platform_dev(platform_device
, driver
);
202 EXPORT_SYMBOL(drm_platform_init
);
204 void drm_platform_exit(struct drm_driver
*driver
, struct platform_device
*platform_device
)
206 struct drm_device
*dev
, *tmp
;
209 list_for_each_entry_safe(dev
, tmp
, &driver
->device_list
, driver_item
)
211 DRM_INFO("Module unloaded\n");
213 EXPORT_SYMBOL(drm_platform_exit
);