152 lines
4.1 KiB
C
152 lines
4.1 KiB
C
/*
|
|
* Derived from drm_pci.c
|
|
*
|
|
* Copyright 2003 José Fonseca.
|
|
* Copyright 2003 Leif Delgass.
|
|
* Copyright (c) 2009, Code Aurora Forum.
|
|
* All Rights Reserved.
|
|
*
|
|
* Permission is hereby granted, free of charge, to any person obtaining a
|
|
* copy of this software and associated documentation files (the "Software"),
|
|
* to deal in the Software without restriction, including without limitation
|
|
* the rights to use, copy, modify, merge, publish, distribute, sublicense,
|
|
* and/or sell copies of the Software, and to permit persons to whom the
|
|
* Software is furnished to do so, subject to the following conditions:
|
|
*
|
|
* The above copyright notice and this permission notice (including the next
|
|
* paragraph) shall be included in all copies or substantial portions of the
|
|
* Software.
|
|
*
|
|
* THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
|
|
* IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
|
|
* FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL THE
|
|
* AUTHORS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER LIABILITY, WHETHER IN AN
|
|
* ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM, OUT OF OR IN CONNECTION
|
|
* WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN THE SOFTWARE.
|
|
*/
|
|
|
|
#include <linux/export.h>
|
|
#include <drm/drmP.h>
|
|
|
|
/*
|
|
* Register.
|
|
*
|
|
* \param platdev - Platform device struture
|
|
* \return zero on success or a negative number on failure.
|
|
*
|
|
* Attempt to gets inter module "drm" information. If we are first
|
|
* then register the character device and inter module information.
|
|
* Try and register, if we fail to register, backout previous work.
|
|
*/
|
|
|
|
static int drm_get_platform_dev(struct platform_device *platdev,
|
|
struct drm_driver *driver)
|
|
{
|
|
struct drm_device *dev;
|
|
int ret;
|
|
|
|
DRM_DEBUG("\n");
|
|
|
|
dev = drm_dev_alloc(driver, &platdev->dev);
|
|
if (!dev)
|
|
return -ENOMEM;
|
|
|
|
dev->platformdev = platdev;
|
|
|
|
ret = drm_dev_register(dev, 0);
|
|
if (ret)
|
|
goto err_free;
|
|
|
|
DRM_INFO("Initialized %s %d.%d.%d %s on minor %d\n",
|
|
driver->name, driver->major, driver->minor, driver->patchlevel,
|
|
driver->date, dev->primary->index);
|
|
|
|
return 0;
|
|
|
|
err_free:
|
|
drm_dev_unref(dev);
|
|
return ret;
|
|
}
|
|
|
|
static int drm_platform_get_irq(struct drm_device *dev)
|
|
{
|
|
return platform_get_irq(dev->platformdev, 0);
|
|
}
|
|
|
|
static const char *drm_platform_get_name(struct drm_device *dev)
|
|
{
|
|
return dev->platformdev->name;
|
|
}
|
|
|
|
static int drm_platform_set_busid(struct drm_device *dev, struct drm_master *master)
|
|
{
|
|
int len, ret, id;
|
|
|
|
master->unique_len = 13 + strlen(dev->platformdev->name);
|
|
master->unique_size = master->unique_len;
|
|
master->unique = kmalloc(master->unique_len + 1, GFP_KERNEL);
|
|
|
|
if (master->unique == NULL)
|
|
return -ENOMEM;
|
|
|
|
id = dev->platformdev->id;
|
|
|
|
/* if only a single instance of the platform device, id will be
|
|
* set to -1.. use 0 instead to avoid a funny looking bus-id:
|
|
*/
|
|
if (id == -1)
|
|
id = 0;
|
|
|
|
len = snprintf(master->unique, master->unique_len,
|
|
"platform:%s:%02d", dev->platformdev->name, id);
|
|
|
|
if (len > master->unique_len) {
|
|
DRM_ERROR("Unique buffer overflowed\n");
|
|
ret = -EINVAL;
|
|
goto err;
|
|
}
|
|
|
|
dev->devname =
|
|
kmalloc(strlen(dev->platformdev->name) +
|
|
master->unique_len + 2, GFP_KERNEL);
|
|
|
|
if (dev->devname == NULL) {
|
|
ret = -ENOMEM;
|
|
goto err;
|
|
}
|
|
|
|
sprintf(dev->devname, "%s@%s", dev->platformdev->name,
|
|
master->unique);
|
|
return 0;
|
|
err:
|
|
return ret;
|
|
}
|
|
|
|
static struct drm_bus drm_platform_bus = {
|
|
.get_irq = drm_platform_get_irq,
|
|
.get_name = drm_platform_get_name,
|
|
.set_busid = drm_platform_set_busid,
|
|
};
|
|
|
|
/**
|
|
* Platform device initialization. Called direct from modules.
|
|
*
|
|
* \return zero on success or a negative number on failure.
|
|
*
|
|
* Initializes a drm_device structures,registering the
|
|
* stubs
|
|
*
|
|
* Expands the \c DRIVER_PREINIT and \c DRIVER_POST_INIT macros before and
|
|
* after the initialization for driver customization.
|
|
*/
|
|
|
|
int drm_platform_init(struct drm_driver *driver, struct platform_device *platform_device)
|
|
{
|
|
DRM_DEBUG("\n");
|
|
|
|
driver->kdriver.platform_device = platform_device;
|
|
driver->bus = &drm_platform_bus;
|
|
return drm_get_platform_dev(platform_device, driver);
|
|
}
|
|
EXPORT_SYMBOL(drm_platform_init);
|