drivers/gpu/drm/vivante/vivante_drv.c

/****************************************************************************
*
*    Copyright (C) 2005 - 2013 by Vivante Corp.
*
*    This program is free software; you can redistribute it and/or modify
*    it under the terms of the GNU General Public License as published by
*    the Free Software Foundation; either version 2 of the license, or
*    (at your option) any later version.
*
*    This program is distributed in the hope that it will be useful,
*    but WITHOUT ANY WARRANTY; without even the implied warranty of
*    MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
*    GNU General Public License for more details.
*
*    You should have received a copy of the GNU General Public License
*    along with this program; if not write to the Free Software
*    Foundation, Inc., 675 Mass Ave, Cambridge, MA 02139, USA.
*
*****************************************************************************/


/* vivante_drv.c -- vivante driver -*- linux-c -*-
 *
 *
 * 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
 * PRECISION INSIGHT AND/OR ITS SUPPLIERS 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.
 *
 * Authors:
 *    Rickard E. (Rik) Faith <faith@valinux.com>
 *    Daryll Strauss <daryll@valinux.com>
 *    Gareth Hughes <gareth@valinux.com>
 */
#include <linux/component.h>
#include <linux/version.h>
#include <linux/module.h>
#include <drm/drmP.h>
#include <drm/drm_pciids.h>
#include <drm/drm_legacy.h>

#include "vivante_drv.h"

static char platformdevicename[] = "platform:Vivante GCCore";
static struct platform_device *pplatformdev;

static const struct file_operations viv_driver_fops = {
	.owner = THIS_MODULE,
	.open = drm_open,
	.release = drm_release,
	.unlocked_ioctl = drm_ioctl,
	.mmap = drm_legacy_mmap,
	.poll = drm_poll,
	.llseek = noop_llseek,
};

static struct drm_driver driver = {
	.fops = &viv_driver_fops,
	.name = DRIVER_NAME,
	.desc = DRIVER_DESC,
	.date = DRIVER_DATE,
	.major = DRIVER_MAJOR,
	.minor = DRIVER_MINOR,
	.patchlevel = DRIVER_PATCHLEVEL,
	.driver_features = DRIVER_LEGACY,
};

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 (IS_ERR(dev))
		return PTR_ERR(dev);

	dev_set_drvdata(&platdev->dev, dev);

	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 __init vivante_init(void)
{
	int retcode;

	pplatformdev = platform_device_register_simple(platformdevicename,
			-1, NULL, 0);
	if (pplatformdev == NULL)
		printk(KERN_ERR"Platform device is null\n");

	retcode = drm_get_platform_dev(pplatformdev, &driver);

	return retcode;
}
module_init(vivante_init);

static void __exit vivante_exit(void)
{
	if (pplatformdev) {
		/* The drvdata is set in drm_get_platform_dev() */
		drm_put_dev(platform_get_drvdata(pplatformdev));
		platform_device_unregister(pplatformdev);
		pplatformdev = NULL;
	}
}
module_exit(vivante_exit);

MODULE_AUTHOR(DRIVER_AUTHOR);
MODULE_DESCRIPTION(DRIVER_DESC);
MODULE_LICENSE("GPL and additional rights");
MODULE_ALIAS("platform:Vivante GCCore");