2010-05-27 13:40:25 -06:00
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/*
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* Derived from drm_pci.c
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*
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* Copyright 2003 José Fonseca.
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* Copyright 2003 Leif Delgass.
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* Copyright (c) 2009, Code Aurora Forum.
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* All Rights Reserved.
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*
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* Permission is hereby granted, free of charge, to any person obtaining a
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* copy of this software and associated documentation files (the "Software"),
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* to deal in the Software without restriction, including without limitation
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* the rights to use, copy, modify, merge, publish, distribute, sublicense,
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* and/or sell copies of the Software, and to permit persons to whom the
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* Software is furnished to do so, subject to the following conditions:
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*
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* The above copyright notice and this permission notice (including the next
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* paragraph) shall be included in all copies or substantial portions of the
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* Software.
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*
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* THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
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* IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
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* FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL THE
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* AUTHORS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER LIABILITY, WHETHER IN AN
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* ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM, OUT OF OR IN CONNECTION
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* WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN THE SOFTWARE.
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*/
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2011-08-30 16:16:33 -06:00
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#include <linux/export.h>
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2010-05-27 13:40:25 -06:00
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#include "drmP.h"
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/**
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* Register.
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*
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* \param platdev - Platform device struture
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* \return zero on success or a negative number on failure.
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*
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* Attempt to gets inter module "drm" information. If we are first
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* then register the character device and inter module information.
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* Try and register, if we fail to register, backout previous work.
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*/
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int drm_get_platform_dev(struct platform_device *platdev,
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struct drm_driver *driver)
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{
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struct drm_device *dev;
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int ret;
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DRM_DEBUG("\n");
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dev = kzalloc(sizeof(*dev), GFP_KERNEL);
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if (!dev)
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return -ENOMEM;
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dev->platformdev = platdev;
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dev->dev = &platdev->dev;
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2010-09-14 04:14:38 -06:00
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mutex_lock(&drm_global_mutex);
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2010-05-27 13:40:25 -06:00
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ret = drm_fill_in_dev(dev, NULL, driver);
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if (ret) {
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printk(KERN_ERR "DRM: Fill_in_dev failed.\n");
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goto err_g1;
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}
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if (drm_core_check_feature(dev, DRIVER_MODESET)) {
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dev_set_drvdata(&platdev->dev, dev);
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ret = drm_get_minor(dev, &dev->control, DRM_MINOR_CONTROL);
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if (ret)
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goto err_g1;
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}
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ret = drm_get_minor(dev, &dev->primary, DRM_MINOR_LEGACY);
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if (ret)
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goto err_g2;
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if (dev->driver->load) {
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ret = dev->driver->load(dev, 0);
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if (ret)
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goto err_g3;
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}
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/* setup the grouping for the legacy output */
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if (drm_core_check_feature(dev, DRIVER_MODESET)) {
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ret = drm_mode_group_init_legacy_group(dev,
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&dev->primary->mode_group);
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if (ret)
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goto err_g3;
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}
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list_add_tail(&dev->driver_item, &driver->device_list);
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2010-09-14 04:14:38 -06:00
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mutex_unlock(&drm_global_mutex);
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2010-05-27 13:40:25 -06:00
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DRM_INFO("Initialized %s %d.%d.%d %s on minor %d\n",
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driver->name, driver->major, driver->minor, driver->patchlevel,
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driver->date, dev->primary->index);
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return 0;
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err_g3:
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drm_put_minor(&dev->primary);
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err_g2:
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if (drm_core_check_feature(dev, DRIVER_MODESET))
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drm_put_minor(&dev->control);
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err_g1:
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kfree(dev);
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2010-09-14 04:14:38 -06:00
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mutex_unlock(&drm_global_mutex);
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2010-05-27 13:40:25 -06:00
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return ret;
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}
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EXPORT_SYMBOL(drm_get_platform_dev);
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2010-12-14 10:16:38 -07:00
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static int drm_platform_get_irq(struct drm_device *dev)
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{
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return platform_get_irq(dev->platformdev, 0);
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}
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static const char *drm_platform_get_name(struct drm_device *dev)
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{
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return dev->platformdev->name;
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}
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static int drm_platform_set_busid(struct drm_device *dev, struct drm_master *master)
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{
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int len, ret;
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2011-07-13 21:12:43 -06:00
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master->unique_len = 13 + strlen(dev->platformdev->name);
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master->unique_size = master->unique_len;
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2010-12-14 10:16:38 -07:00
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master->unique = kmalloc(master->unique_len + 1, GFP_KERNEL);
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if (master->unique == NULL)
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return -ENOMEM;
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len = snprintf(master->unique, master->unique_len,
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2011-07-13 21:12:43 -06:00
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"platform:%s:%02d", dev->platformdev->name, dev->platformdev->id);
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2010-12-14 10:16:38 -07:00
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if (len > master->unique_len) {
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DRM_ERROR("Unique buffer overflowed\n");
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ret = -EINVAL;
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goto err;
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}
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dev->devname =
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kmalloc(strlen(dev->platformdev->name) +
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master->unique_len + 2, GFP_KERNEL);
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if (dev->devname == NULL) {
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ret = -ENOMEM;
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goto err;
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}
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sprintf(dev->devname, "%s@%s", dev->platformdev->name,
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master->unique);
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return 0;
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err:
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return ret;
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}
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static struct drm_bus drm_platform_bus = {
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.bus_type = DRIVER_BUS_PLATFORM,
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.get_irq = drm_platform_get_irq,
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.get_name = drm_platform_get_name,
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.set_busid = drm_platform_set_busid,
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};
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2010-05-27 13:40:25 -06:00
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/**
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2010-12-14 10:16:38 -07:00
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* Platform device initialization. Called direct from modules.
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2010-05-27 13:40:25 -06:00
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*
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* \return zero on success or a negative number on failure.
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*
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* Initializes a drm_device structures,registering the
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* stubs
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*
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* Expands the \c DRIVER_PREINIT and \c DRIVER_POST_INIT macros before and
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* after the initialization for driver customization.
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*/
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2010-12-14 10:16:38 -07:00
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int drm_platform_init(struct drm_driver *driver, struct platform_device *platform_device)
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2010-05-27 13:40:25 -06:00
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{
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2010-12-14 10:16:38 -07:00
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DRM_DEBUG("\n");
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driver->kdriver.platform_device = platform_device;
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driver->bus = &drm_platform_bus;
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INIT_LIST_HEAD(&driver->device_list);
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return drm_get_platform_dev(platform_device, driver);
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}
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EXPORT_SYMBOL(drm_platform_init);
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void drm_platform_exit(struct drm_driver *driver, struct platform_device *platform_device)
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{
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struct drm_device *dev, *tmp;
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DRM_DEBUG("\n");
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list_for_each_entry_safe(dev, tmp, &driver->device_list, driver_item)
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drm_put_dev(dev);
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DRM_INFO("Module unloaded\n");
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2010-05-27 13:40:25 -06:00
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}
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2010-12-14 10:16:38 -07:00
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EXPORT_SYMBOL(drm_platform_exit);
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