drm_platform.c

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    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 #include <sys/cdefs.h>
   28 __FBSDID("$FreeBSD$");
   29 
   30 #include <dev/drm2/drmP.h>
   31 
   32 static void drm_platform_free_irq(struct drm_device *dev)
   33 {
   34         if (dev->irqr == NULL)
   35                 return;
   36 
   37         bus_release_resource(dev->dev, SYS_RES_IRQ,
   38             dev->irqrid, dev->irqr);
   39 
   40         dev->irqr = NULL;
   41         dev->irq = 0;
   42 }
   43 
   44 static const char *drm_platform_get_name(struct drm_device *dev)
   45 {
   46         return dev->driver->name;
   47 }
   48 
   49 static int drm_platform_set_busid(struct drm_device *dev, struct drm_master *master)
   50 {
   51         int len, ret, id;
   52 
   53         master->unique_len = 13 + strlen(dev->driver->name);
   54         master->unique_size = master->unique_len;
   55         master->unique = malloc(master->unique_len + 1, DRM_MEM_DRIVER, M_NOWAIT);
   56 
   57         if (master->unique == NULL)
   58                 return -ENOMEM;
   59 
   60         id = 0; // XXX dev->driver->id;
   61 
   62         /* if only a single instance of the platform device, id will be
   63          * set to -1.. use 0 instead to avoid a funny looking bus-id:
   64          */
   65         if (id == -1)
   66                 id = 0;
   67 
   68         len = snprintf(master->unique, master->unique_len,
   69                         "platform:%s:%02d", dev->driver->name, id);
   70 
   71         if (len > master->unique_len) {
   72                 DRM_ERROR("Unique buffer overflowed\n");
   73                 ret = -EINVAL;
   74                 goto err;
   75         }
   76 
   77         return 0;
   78 err:
   79         return ret;
   80 }
   81 
   82 static int drm_platform_get_irq(struct drm_device *dev)
   83 {
   84         if (dev->irqr)
   85                 return (dev->irq);
   86 
   87         dev->irqr = bus_alloc_resource_any(dev->dev, SYS_RES_IRQ,
   88             &dev->irqrid, RF_SHAREABLE);
   89         if (!dev->irqr) {
   90                 dev_err(dev->dev, "Failed to allocate IRQ\n");
   91                 return (0);
   92         }
   93 
   94         dev->irq = (int) rman_get_start(dev->irqr);
   95 
   96         return (dev->irq);
   97 }
   98 
   99 static struct drm_bus drm_platform_bus = {
  100         .bus_type = DRIVER_BUS_PLATFORM,
  101         .get_irq = drm_platform_get_irq,
  102         .free_irq = drm_platform_free_irq,
  103         .get_name = drm_platform_get_name,
  104         .set_busid = drm_platform_set_busid,
  105 };
  106 
  107 /**
  108  * Register.
  109  *
  110  * \param platdev - Platform device structure
  111  * \return zero on success or a negative number on failure.
  112  *
  113  * Attempt to gets inter module "drm" information. If we are first
  114  * then register the character device and inter module information.
  115  * Try and register, if we fail to register, backout previous work.
  116  */
  117 
  118 int drm_get_platform_dev(device_t kdev, struct drm_device *dev,
  119                          struct drm_driver *driver)
  120 {
  121         int ret;
  122 
  123         DRM_DEBUG("\n");
  124 
  125         driver->bus = &drm_platform_bus;
  126 
  127         dev->dev = kdev;
  128 
  129         sx_xlock(&drm_global_mutex);
  130 
  131         ret = drm_fill_in_dev(dev, driver);
  132 
  133         if (ret) {
  134                 printf("DRM: Fill_in_dev failed.\n");
  135                 goto err_g1;
  136         }
  137 
  138         if (drm_core_check_feature(dev, DRIVER_MODESET)) {
  139                 ret = drm_get_minor(dev, &dev->control, DRM_MINOR_CONTROL);
  140                 if (ret)
  141                         goto err_g1;
  142         }
  143 
  144         ret = drm_get_minor(dev, &dev->primary, DRM_MINOR_LEGACY);
  145         if (ret)
  146                 goto err_g2;
  147 
  148         if (dev->driver->load) {
  149                 ret = dev->driver->load(dev, 0);
  150                 if (ret)
  151                         goto err_g3;
  152         }
  153 
  154         /* setup the grouping for the legacy output */
  155         if (drm_core_check_feature(dev, DRIVER_MODESET)) {
  156                 ret = drm_mode_group_init_legacy_group(dev,
  157                                 &dev->primary->mode_group);
  158                 if (ret)
  159                         goto err_g3;
  160         }
  161 
  162 #ifdef FREEBSD_NOTYET
  163         list_add_tail(&dev->driver_item, &driver->device_list);
  164 #endif /* FREEBSD_NOTYET */
  165 
  166         sx_xunlock(&drm_global_mutex);
  167 
  168         DRM_INFO("Initialized %s %d.%d.%d %s on minor %d\n",
  169                  driver->name, driver->major, driver->minor, driver->patchlevel,
  170                  driver->date, dev->primary->index);
  171 
  172         return 0;
  173 
  174 err_g3:
  175         drm_put_minor(&dev->primary);
  176 err_g2:
  177         if (drm_core_check_feature(dev, DRIVER_MODESET))
  178                 drm_put_minor(&dev->control);
  179 err_g1:
  180         sx_xunlock(&drm_global_mutex);
  181         return ret;
  182 }
  183 EXPORT_SYMBOL(drm_get_platform_dev);

Cache object: 8a366efda98427dffd738886aa921325

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FreeBSD/Linux Kernel Cross Reference sys/dev/drm2/drm_platform.c

FreeBSD/Linux Kernel Cross Reference
sys/dev/drm2/drm_platform.c