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 28#include <linux/export.h> 29#include "drmP.h" 30 31/** 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 42int drm_get_platform_dev(struct platform_device *platdev, 43 struct drm_driver *driver) 44{ 45 struct drm_device *dev; 46 int ret; 47 48 DRM_DEBUG("\n"); 49 50 dev = kzalloc(sizeof(*dev), GFP_KERNEL); 51 if (!dev) 52 return -ENOMEM; 53 54 dev->platformdev = platdev; 55 dev->dev = &platdev->dev; 56 57 mutex_lock(&drm_global_mutex); 58 59 ret = drm_fill_in_dev(dev, NULL, driver); 60 61 if (ret) { 62 printk(KERN_ERR "DRM: Fill_in_dev failed.\n"); 63 goto err_g1; 64 } 65 66 if (drm_core_check_feature(dev, DRIVER_MODESET)) { 67 dev_set_drvdata(&platdev->dev, dev); 68 ret = drm_get_minor(dev, &dev->control, DRM_MINOR_CONTROL); 69 if (ret) 70 goto err_g1; 71 } 72 73 ret = drm_get_minor(dev, &dev->primary, DRM_MINOR_LEGACY); 74 if (ret) 75 goto err_g2; 76 77 if (dev->driver->load) { 78 ret = dev->driver->load(dev, 0); 79 if (ret) 80 goto err_g3; 81 } 82 83 /* setup the grouping for the legacy output */ 84 if (drm_core_check_feature(dev, DRIVER_MODESET)) { 85 ret = drm_mode_group_init_legacy_group(dev, 86 &dev->primary->mode_group); 87 if (ret) 88 goto err_g3; 89 } 90 91 list_add_tail(&dev->driver_item, &driver->device_list); 92 93 mutex_unlock(&drm_global_mutex); 94 95 DRM_INFO("Initialized %s %d.%d.%d %s on minor %d\n", 96 driver->name, driver->major, driver->minor, driver->patchlevel, 97 driver->date, dev->primary->index); 98 99 return 0; 100 101err_g3: 102 drm_put_minor(&dev->primary); 103err_g2: 104 if (drm_core_check_feature(dev, DRIVER_MODESET)) 105 drm_put_minor(&dev->control); 106err_g1: 107 kfree(dev); 108 mutex_unlock(&drm_global_mutex); 109 return ret; 110} 111EXPORT_SYMBOL(drm_get_platform_dev); 112 113static int drm_platform_get_irq(struct drm_device *dev) 114{ 115 return platform_get_irq(dev->platformdev, 0); 116} 117 118static const char *drm_platform_get_name(struct drm_device *dev) 119{ 120 return dev->platformdev->name; 121} 122 123static int drm_platform_set_busid(struct drm_device *dev, struct drm_master *master) 124{ 125 int len, ret, id; 126 127 master->unique_len = 13 + strlen(dev->platformdev->name); 128 master->unique_size = master->unique_len; 129 master->unique = kmalloc(master->unique_len + 1, GFP_KERNEL); 130 131 if (master->unique == NULL) 132 return -ENOMEM; 133 134 id = dev->platformdev->id; 135 136 /* if only a single instance of the platform device, id will be 137 * set to -1.. use 0 instead to avoid a funny looking bus-id: 138 */ 139 if (id == -1) 140 id = 0; 141 142 len = snprintf(master->unique, master->unique_len, 143 "platform:%s:%02d", dev->platformdev->name, id); 144 145 if (len > master->unique_len) { 146 DRM_ERROR("Unique buffer overflowed\n"); 147 ret = -EINVAL; 148 goto err; 149 } 150 151 dev->devname = 152 kmalloc(strlen(dev->platformdev->name) + 153 master->unique_len + 2, GFP_KERNEL); 154 155 if (dev->devname == NULL) { 156 ret = -ENOMEM; 157 goto err; 158 } 159 160 sprintf(dev->devname, "%s@%s", dev->platformdev->name, 161 master->unique); 162 return 0; 163err: 164 return ret; 165} 166 167static struct drm_bus drm_platform_bus = { 168 .bus_type = DRIVER_BUS_PLATFORM, 169 .get_irq = drm_platform_get_irq, 170 .get_name = drm_platform_get_name, 171 .set_busid = drm_platform_set_busid, 172}; 173 174/** 175 * Platform device initialization. Called direct from modules. 176 * 177 * \return zero on success or a negative number on failure. 178 * 179 * Initializes a drm_device structures,registering the 180 * stubs 181 * 182 * Expands the \c DRIVER_PREINIT and \c DRIVER_POST_INIT macros before and 183 * after the initialization for driver customization. 184 */ 185 186int drm_platform_init(struct drm_driver *driver, struct platform_device *platform_device) 187{ 188 DRM_DEBUG("\n"); 189 190 driver->kdriver.platform_device = platform_device; 191 driver->bus = &drm_platform_bus; 192 INIT_LIST_HEAD(&driver->device_list); 193 return drm_get_platform_dev(platform_device, driver); 194} 195EXPORT_SYMBOL(drm_platform_init); 196 197void drm_platform_exit(struct drm_driver *driver, struct platform_device *platform_device) 198{ 199 struct drm_device *dev, *tmp; 200 DRM_DEBUG("\n"); 201 202 list_for_each_entry_safe(dev, tmp, &driver->device_list, driver_item) 203 drm_put_dev(dev); 204 DRM_INFO("Module unloaded\n"); 205} 206EXPORT_SYMBOL(drm_platform_exit); 207