[linux-2.6-block.git] / drivers / gpu / drm / drm_platform.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;
}

int drm_platform_set_busid(struct drm_device *dev, struct drm_master *master)
{
	int id;

	id = dev->platformdev->id;
	if (id < 0)
		id = 0;

	master->unique = kasprintf(GFP_KERNEL, "platform:%s:%02d",
						dev->platformdev->name, id);
	if (!master->unique)
		return -ENOMEM;

	master->unique_len = strlen(master->unique);
	return 0;
}
EXPORT_SYMBOL(drm_platform_set_busid);

/**
 * drm_platform_init - Register a platform device with the DRM subsystem
 * @driver: DRM device driver
 * @platform_device: platform device to register
 *
 * Registers the specified DRM device driver and platform device with the DRM
 * subsystem, initializing a drm_device structure and calling the driver's
 * .load() function.
 *
 * NOTE: This function is deprecated, please use drm_dev_alloc() and
 * drm_dev_register() instead and remove your ->load() callback.
 *
 * Return: 0 on success or a negative error code on failure.
 */
int drm_platform_init(struct drm_driver *driver, struct platform_device *platform_device)
{
	DRM_DEBUG("\n");

	return drm_get_platform_dev(platform_device, driver);
}
EXPORT_SYMBOL(drm_platform_init);
Commit	Line	Data
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
2d1a8a48	28	#include <linux/export.h>
760285e7	29	#include <drm/drmP.h>
dcdb1674	30
66cc8b6b	31	/*
dcdb1674 JC	32	* Register.
	33	*
	34	* \param platdev - Platform device struture
	35	* \return zero on success or a negative number on failure.
	36	*
	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.
	40	*/
	41
66cc8b6b LD	42	static int drm_get_platform_dev(struct platform_device *platdev,
66cc8b6b LD	43	struct drm_driver *driver)
dcdb1674 JC	44	{
	45	struct drm_device *dev;
	46	int ret;
	47
	48	DRM_DEBUG("\n");
	49
1bb72532	50	dev = drm_dev_alloc(driver, &platdev->dev);
dcdb1674 JC	51	if (!dev)
	52	return -ENOMEM;
	53
	54	dev->platformdev = platdev;
dcdb1674	55
c22f0ace	56	ret = drm_dev_register(dev, 0);
dcdb1674	57	if (ret)
c22f0ace	58	goto err_free;
b64c115e	59
dcdb1674 JC	60	DRM_INFO("Initialized %s %d.%d.%d %s on minor %d\n",
	61	driver->name, driver->major, driver->minor, driver->patchlevel,
	62	driver->date, dev->primary->index);
	63
	64	return 0;
	65
c22f0ace	66	err_free:
099d1c29	67	drm_dev_unref(dev);
dcdb1674 JC	68	return ret;
dcdb1674 JC	69	}
dcdb1674	70
915b4d11	71	int drm_platform_set_busid(struct drm_device dev, struct drm_master master)
8410ea3b	72	{
d0a39164	73	int id;
8410ea3b	74
b19c19af	75	id = dev->platformdev->id;
d0a39164	76	if (id < 0)
b19c19af RC	77	id = 0;
b19c19af RC	78
d0a39164 DH	79	master->unique = kasprintf(GFP_KERNEL, "platform:%s:%02d",
	80	dev->platformdev->name, id);
	81	if (!master->unique)
	82	return -ENOMEM;
8410ea3b	83
d0a39164	84	master->unique_len = strlen(master->unique);
8410ea3b	85	return 0;
8410ea3b	86	}
915b4d11	87	EXPORT_SYMBOL(drm_platform_set_busid);
8410ea3b	88
dcdb1674	89	/**
c6a1af8a TR	90	* drm_platform_init - Register a platform device with the DRM subsystem
	91	* @driver: DRM device driver
	92	* @platform_device: platform device to register
dcdb1674	93	*
c6a1af8a TR	94	* Registers the specified DRM device driver and platform device with the DRM
	95	* subsystem, initializing a drm_device structure and calling the driver's
	96	* .load() function.
dcdb1674	97	*
6e3f797c DV	98	* NOTE: This function is deprecated, please use drm_dev_alloc() and
	99	* drm_dev_register() instead and remove your ->load() callback.
	100	*
c6a1af8a	101	* Return: 0 on success or a negative error code on failure.
dcdb1674	102	*/
8410ea3b	103	int drm_platform_init(struct drm_driver driver, struct platform_device platform_device)
dcdb1674	104	{
8410ea3b DA	105	DRM_DEBUG("\n");
8410ea3b DA	106
8410ea3b DA	107	return drm_get_platform_dev(platform_device, driver);
	108	}
	109	EXPORT_SYMBOL(drm_platform_init);