LXR linux/drivers/gpu/drm/cirrus/cirrus

   1/*
   2 * Copyright 2012 Red Hat <mjg@redhat.com>
   3 *
   4 * This file is subject to the terms and conditions of the GNU General
   5 * Public License version 2. See the file COPYING in the main
   6 * directory of this archive for more details.
   7 *
   8 * Authors: Matthew Garrett
   9 *          Dave Airlie
  10 */
  11#include <linux/module.h>
  12#include <linux/console.h>
  13#include <drm/drmP.h>
  14
  15#include "cirrus_drv.h"
  16
  17int cirrus_modeset = -1;
  18
  19MODULE_PARM_DESC(modeset, "Disable/Enable modesetting");
  20module_param_named(modeset, cirrus_modeset, int, 0400);
  21
  22/*
  23 * This is the generic driver code. This binds the driver to the drm core,
  24 * which then performs further device association and calls our graphics init
  25 * functions
  26 */
  27
  28static struct drm_driver driver;
  29
  30/* only bind to the cirrus chip in qemu */
  31static DEFINE_PCI_DEVICE_TABLE(pciidlist) = {
  32        { PCI_VENDOR_ID_CIRRUS, PCI_DEVICE_ID_CIRRUS_5446, 0x1af4, 0x1100, 0,
  33          0, 0 },
  34        {0,}
  35};
  36
  37
  38static int cirrus_kick_out_firmware_fb(struct pci_dev *pdev)
  39{
  40        struct apertures_struct *ap;
  41        bool primary = false;
  42
  43        ap = alloc_apertures(1);
  44        if (!ap)
  45                return -ENOMEM;
  46
  47        ap->ranges[0].base = pci_resource_start(pdev, 0);
  48        ap->ranges[0].size = pci_resource_len(pdev, 0);
  49
  50#ifdef CONFIG_X86
  51        primary = pdev->resource[PCI_ROM_RESOURCE].flags & IORESOURCE_ROM_SHADOW;
  52#endif
  53        remove_conflicting_framebuffers(ap, "cirrusdrmfb", primary);
  54        kfree(ap);
  55
  56        return 0;
  57}
  58
  59static int cirrus_pci_probe(struct pci_dev *pdev,
  60                            const struct pci_device_id *ent)
  61{
  62        int ret;
  63
  64        ret = cirrus_kick_out_firmware_fb(pdev);
  65        if (ret)
  66                return ret;
  67
  68        return drm_get_pci_dev(pdev, ent, &driver);
  69}
  70
  71static void cirrus_pci_remove(struct pci_dev *pdev)
  72{
  73        struct drm_device *dev = pci_get_drvdata(pdev);
  74
  75        drm_put_dev(dev);
  76}
  77
  78static const struct file_operations cirrus_driver_fops = {
  79        .owner = THIS_MODULE,
  80        .open = drm_open,
  81        .release = drm_release,
  82        .unlocked_ioctl = drm_ioctl,
  83        .mmap = cirrus_mmap,
  84        .poll = drm_poll,
  85#ifdef CONFIG_COMPAT
  86        .compat_ioctl = drm_compat_ioctl,
  87#endif
  88        .fasync = drm_fasync,
  89};
  90static struct drm_driver driver = {
  91        .driver_features = DRIVER_MODESET | DRIVER_GEM | DRIVER_USE_MTRR,
  92        .load = cirrus_driver_load,
  93        .unload = cirrus_driver_unload,
  94        .fops = &cirrus_driver_fops,
  95        .name = DRIVER_NAME,
  96        .desc = DRIVER_DESC,
  97        .date = DRIVER_DATE,
  98        .major = DRIVER_MAJOR,
  99        .minor = DRIVER_MINOR,
 100        .patchlevel = DRIVER_PATCHLEVEL,
 101        .gem_init_object = cirrus_gem_init_object,
 102        .gem_free_object = cirrus_gem_free_object,
 103        .dumb_create = cirrus_dumb_create,
 104        .dumb_map_offset = cirrus_dumb_mmap_offset,
 105        .dumb_destroy = cirrus_dumb_destroy,
 106};
 107
 108static struct pci_driver cirrus_pci_driver = {
 109        .name = DRIVER_NAME,
 110        .id_table = pciidlist,
 111        .probe = cirrus_pci_probe,
 112        .remove = cirrus_pci_remove,
 113};
 114
 115static int __init cirrus_init(void)
 116{
 117#ifdef CONFIG_VGA_CONSOLE
 118        if (vgacon_text_force() && cirrus_modeset == -1)
 119                return -EINVAL;
 120#endif
 121
 122        if (cirrus_modeset == 0)
 123                return -EINVAL;
 124        return drm_pci_init(&driver, &cirrus_pci_driver);
 125}
 126
 127static void __exit cirrus_exit(void)
 128{
 129        drm_pci_exit(&driver, &cirrus_pci_driver);
 130}
 131
 132module_init(cirrus_init);
 133module_exit(cirrus_exit);
 134
 135MODULE_DEVICE_TABLE(pci, pciidlist);
 136MODULE_AUTHOR(DRIVER_AUTHOR);
 137MODULE_DESCRIPTION(DRIVER_DESC);
 138MODULE_LICENSE("GPL");
 139