1/* 2 * Derived from drm_pci.c 3 * 4 * Copyright 2003 Jos�� 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 28#include "drmP.h" 29 30/** 31 * Register. 32 * 33 * \param platdev - Platform device struture 34 * \return zero on success or a negative number on failure. 35 * 36 * Attempt to gets inter module "drm" information. If we are first 37 * then register the character device and inter module information. 38 * Try and register, if we fail to register, backout previous work. 39 */ 40 41int drm_get_platform_dev(struct platform_device *platdev, 42 struct drm_driver *driver) 43{ 44 struct drm_device *dev; 45 int ret; 46 47 DRM_DEBUG("\n"); 48 49 dev = kzalloc(sizeof(*dev), GFP_KERNEL); 50 if (!dev) 51 return -ENOMEM; 52 53 dev->platformdev = platdev; 54 dev->dev = &platdev->dev; 55 56 mutex_lock(&drm_global_mutex); 57 58 ret = drm_fill_in_dev(dev, NULL, driver); 59 60 if (ret) { 61 printk(KERN_ERR "DRM: Fill_in_dev failed.\n"); 62 goto err_g1; 63 } 64 65 if (drm_core_check_feature(dev, DRIVER_MODESET)) { 66 dev_set_drvdata(&platdev->dev, dev); 67 ret = drm_get_minor(dev, &dev->control, DRM_MINOR_CONTROL); 68 if (ret) 69 goto err_g1; 70 } 71 72 ret = drm_get_minor(dev, &dev->primary, DRM_MINOR_LEGACY); 73 if (ret) 74 goto err_g2; 75 76 if (dev->driver->load) { 77 ret = dev->driver->load(dev, 0); 78 if (ret) 79 goto err_g3; 80 } 81 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); 86 if (ret) 87 goto err_g3; 88 } 89 90 list_add_tail(&dev->driver_item, &driver->device_list); 91 92 mutex_unlock(&drm_global_mutex); 93 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); 97 98 return 0; 99 100err_g3: 101 drm_put_minor(&dev->primary); 102err_g2: 103 if (drm_core_check_feature(dev, DRIVER_MODESET)) 104 drm_put_minor(&dev->control); 105err_g1: 106 kfree(dev); 107 mutex_unlock(&drm_global_mutex); 108 return ret; 109} 110EXPORT_SYMBOL(drm_get_platform_dev); 111 112/** 113 * Platform device initialization. Called via drm_init at module load time, 114 * 115 * \return zero on success or a negative number on failure. 116 * 117 * Initializes a drm_device structures,registering the 118 * stubs 119 * 120 * Expands the \c DRIVER_PREINIT and \c DRIVER_POST_INIT macros before and 121 * after the initialization for driver customization. 122 */ 123 124int drm_platform_init(struct drm_driver *driver) 125{ 126 return drm_get_platform_dev(driver->platform_device, driver); 127} 128