Jordan Crouse | dcdb167 | 2010-05-27 13:40:25 -0600 | [diff] [blame] | 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 | |
Paul Gortmaker | 2d1a8a4 | 2011-08-30 18:16:33 -0400 | [diff] [blame] | 28 | #include <linux/export.h> |
David Howells | 760285e | 2012-10-02 18:01:07 +0100 | [diff] [blame] | 29 | #include <drm/drmP.h> |
Jordan Crouse | dcdb167 | 2010-05-27 13:40:25 -0600 | [diff] [blame] | 30 | |
Lespiau, Damien | 66cc8b6 | 2013-08-20 00:53:10 +0100 | [diff] [blame^] | 31 | /* |
Jordan Crouse | dcdb167 | 2010-05-27 13:40:25 -0600 | [diff] [blame] | 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 | |
Lespiau, Damien | 66cc8b6 | 2013-08-20 00:53:10 +0100 | [diff] [blame^] | 42 | static int drm_get_platform_dev(struct platform_device *platdev, |
| 43 | struct drm_driver *driver) |
Jordan Crouse | dcdb167 | 2010-05-27 13:40:25 -0600 | [diff] [blame] | 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 | |
Dave Airlie | b64c115 | 2010-09-14 20:14:38 +1000 | [diff] [blame] | 57 | mutex_lock(&drm_global_mutex); |
| 58 | |
Jordan Crouse | dcdb167 | 2010-05-27 13:40:25 -0600 | [diff] [blame] | 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)) { |
Jordan Crouse | dcdb167 | 2010-05-27 13:40:25 -0600 | [diff] [blame] | 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 | |
Dave Airlie | b64c115 | 2010-09-14 20:14:38 +1000 | [diff] [blame] | 92 | mutex_unlock(&drm_global_mutex); |
| 93 | |
Jordan Crouse | dcdb167 | 2010-05-27 13:40:25 -0600 | [diff] [blame] | 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 | |
| 100 | err_g3: |
| 101 | drm_put_minor(&dev->primary); |
| 102 | err_g2: |
| 103 | if (drm_core_check_feature(dev, DRIVER_MODESET)) |
| 104 | drm_put_minor(&dev->control); |
| 105 | err_g1: |
| 106 | kfree(dev); |
Dave Airlie | b64c115 | 2010-09-14 20:14:38 +1000 | [diff] [blame] | 107 | mutex_unlock(&drm_global_mutex); |
Jordan Crouse | dcdb167 | 2010-05-27 13:40:25 -0600 | [diff] [blame] | 108 | return ret; |
| 109 | } |
Jordan Crouse | dcdb167 | 2010-05-27 13:40:25 -0600 | [diff] [blame] | 110 | |
Dave Airlie | 8410ea3 | 2010-12-15 03:16:38 +1000 | [diff] [blame] | 111 | static int drm_platform_get_irq(struct drm_device *dev) |
| 112 | { |
| 113 | return platform_get_irq(dev->platformdev, 0); |
| 114 | } |
| 115 | |
| 116 | static const char *drm_platform_get_name(struct drm_device *dev) |
| 117 | { |
| 118 | return dev->platformdev->name; |
| 119 | } |
| 120 | |
| 121 | static int drm_platform_set_busid(struct drm_device *dev, struct drm_master *master) |
| 122 | { |
Rob Clark | b19c19a | 2012-03-06 10:20:36 -0600 | [diff] [blame] | 123 | int len, ret, id; |
Dave Airlie | 8410ea3 | 2010-12-15 03:16:38 +1000 | [diff] [blame] | 124 | |
Rob Clark | 28a4a16 | 2011-07-14 03:12:43 +0000 | [diff] [blame] | 125 | master->unique_len = 13 + strlen(dev->platformdev->name); |
| 126 | master->unique_size = master->unique_len; |
Dave Airlie | 8410ea3 | 2010-12-15 03:16:38 +1000 | [diff] [blame] | 127 | master->unique = kmalloc(master->unique_len + 1, GFP_KERNEL); |
| 128 | |
| 129 | if (master->unique == NULL) |
| 130 | return -ENOMEM; |
| 131 | |
Rob Clark | b19c19a | 2012-03-06 10:20:36 -0600 | [diff] [blame] | 132 | id = dev->platformdev->id; |
| 133 | |
| 134 | /* if only a single instance of the platform device, id will be |
| 135 | * set to -1.. use 0 instead to avoid a funny looking bus-id: |
| 136 | */ |
| 137 | if (id == -1) |
| 138 | id = 0; |
| 139 | |
Dave Airlie | 8410ea3 | 2010-12-15 03:16:38 +1000 | [diff] [blame] | 140 | len = snprintf(master->unique, master->unique_len, |
Rob Clark | b19c19a | 2012-03-06 10:20:36 -0600 | [diff] [blame] | 141 | "platform:%s:%02d", dev->platformdev->name, id); |
Dave Airlie | 8410ea3 | 2010-12-15 03:16:38 +1000 | [diff] [blame] | 142 | |
| 143 | if (len > master->unique_len) { |
| 144 | DRM_ERROR("Unique buffer overflowed\n"); |
| 145 | ret = -EINVAL; |
| 146 | goto err; |
| 147 | } |
| 148 | |
| 149 | dev->devname = |
| 150 | kmalloc(strlen(dev->platformdev->name) + |
| 151 | master->unique_len + 2, GFP_KERNEL); |
| 152 | |
| 153 | if (dev->devname == NULL) { |
| 154 | ret = -ENOMEM; |
| 155 | goto err; |
| 156 | } |
| 157 | |
| 158 | sprintf(dev->devname, "%s@%s", dev->platformdev->name, |
| 159 | master->unique); |
| 160 | return 0; |
| 161 | err: |
| 162 | return ret; |
| 163 | } |
| 164 | |
| 165 | static struct drm_bus drm_platform_bus = { |
| 166 | .bus_type = DRIVER_BUS_PLATFORM, |
| 167 | .get_irq = drm_platform_get_irq, |
| 168 | .get_name = drm_platform_get_name, |
| 169 | .set_busid = drm_platform_set_busid, |
| 170 | }; |
| 171 | |
Jordan Crouse | dcdb167 | 2010-05-27 13:40:25 -0600 | [diff] [blame] | 172 | /** |
Dave Airlie | 8410ea3 | 2010-12-15 03:16:38 +1000 | [diff] [blame] | 173 | * Platform device initialization. Called direct from modules. |
Jordan Crouse | dcdb167 | 2010-05-27 13:40:25 -0600 | [diff] [blame] | 174 | * |
| 175 | * \return zero on success or a negative number on failure. |
| 176 | * |
| 177 | * Initializes a drm_device structures,registering the |
| 178 | * stubs |
| 179 | * |
| 180 | * Expands the \c DRIVER_PREINIT and \c DRIVER_POST_INIT macros before and |
| 181 | * after the initialization for driver customization. |
| 182 | */ |
| 183 | |
Dave Airlie | 8410ea3 | 2010-12-15 03:16:38 +1000 | [diff] [blame] | 184 | int drm_platform_init(struct drm_driver *driver, struct platform_device *platform_device) |
Jordan Crouse | dcdb167 | 2010-05-27 13:40:25 -0600 | [diff] [blame] | 185 | { |
Dave Airlie | 8410ea3 | 2010-12-15 03:16:38 +1000 | [diff] [blame] | 186 | DRM_DEBUG("\n"); |
| 187 | |
| 188 | driver->kdriver.platform_device = platform_device; |
| 189 | driver->bus = &drm_platform_bus; |
| 190 | INIT_LIST_HEAD(&driver->device_list); |
| 191 | return drm_get_platform_dev(platform_device, driver); |
Jordan Crouse | dcdb167 | 2010-05-27 13:40:25 -0600 | [diff] [blame] | 192 | } |
Dave Airlie | 8410ea3 | 2010-12-15 03:16:38 +1000 | [diff] [blame] | 193 | EXPORT_SYMBOL(drm_platform_init); |
| 194 | |
| 195 | void drm_platform_exit(struct drm_driver *driver, struct platform_device *platform_device) |
| 196 | { |
| 197 | struct drm_device *dev, *tmp; |
| 198 | DRM_DEBUG("\n"); |
| 199 | |
| 200 | list_for_each_entry_safe(dev, tmp, &driver->device_list, driver_item) |
| 201 | drm_put_dev(dev); |
| 202 | DRM_INFO("Module unloaded\n"); |
| 203 | } |
| 204 | EXPORT_SYMBOL(drm_platform_exit); |