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#include <drm/drm_crtc_helper.h>
  15
  16#include "cirrus_drv.h"
  17
  18int cirrus_modeset = -1;
  19int cirrus_bpp = 16;
  20
  21MODULE_PARM_DESC(modeset, "Disable/Enable modesetting");
  22module_param_named(modeset, cirrus_modeset, int, 0400);
  23MODULE_PARM_DESC(bpp, "Max bits-per-pixel (default:16)");
  24module_param_named(bpp, cirrus_bpp, int, 0400);
  25
  26/*
  27 * This is the generic driver code. This binds the driver to the drm core,
  28 * which then performs further device association and calls our graphics init
  29 * functions
  30 */
  31
  32static struct drm_driver driver;
  33
  34/* only bind to the cirrus chip in qemu */
  35static const struct pci_device_id pciidlist[] = {
  36        { PCI_VENDOR_ID_CIRRUS, PCI_DEVICE_ID_CIRRUS_5446,
  37          PCI_SUBVENDOR_ID_REDHAT_QUMRANET, PCI_SUBDEVICE_ID_QEMU,
  38          0, 0, 0 },
  39        { PCI_VENDOR_ID_CIRRUS, PCI_DEVICE_ID_CIRRUS_5446, PCI_VENDOR_ID_XEN,
  40          0x0001, 0, 0, 0 },
  41        {0,}
  42};
  43
  44
  45static int cirrus_pci_probe(struct pci_dev *pdev,
  46                            const struct pci_device_id *ent)
  47{
  48        int ret;
  49
  50        ret = drm_fb_helper_remove_conflicting_pci_framebuffers(pdev, 0, "cirrusdrmfb");
  51        if (ret)
  52                return ret;
  53
  54        return drm_get_pci_dev(pdev, ent, &driver);
  55}
  56
  57static void cirrus_pci_remove(struct pci_dev *pdev)
  58{
  59        struct drm_device *dev = pci_get_drvdata(pdev);
  60
  61        drm_put_dev(dev);
  62}
  63
  64#ifdef CONFIG_PM_SLEEP
  65static int cirrus_pm_suspend(struct device *dev)
  66{
  67        struct pci_dev *pdev = to_pci_dev(dev);
  68        struct drm_device *drm_dev = pci_get_drvdata(pdev);
  69        struct cirrus_device *cdev = drm_dev->dev_private;
  70
  71        drm_kms_helper_poll_disable(drm_dev);
  72
  73        if (cdev->mode_info.gfbdev) {
  74                console_lock();
  75                drm_fb_helper_set_suspend(&cdev->mode_info.gfbdev->helper, 1);
  76                console_unlock();
  77        }
  78
  79        return 0;
  80}
  81
  82static int cirrus_pm_resume(struct device *dev)
  83{
  84        struct pci_dev *pdev = to_pci_dev(dev);
  85        struct drm_device *drm_dev = pci_get_drvdata(pdev);
  86        struct cirrus_device *cdev = drm_dev->dev_private;
  87
  88        drm_helper_resume_force_mode(drm_dev);
  89
  90        if (cdev->mode_info.gfbdev) {
  91                console_lock();
  92                drm_fb_helper_set_suspend(&cdev->mode_info.gfbdev->helper, 0);
  93                console_unlock();
  94        }
  95
  96        drm_kms_helper_poll_enable(drm_dev);
  97        return 0;
  98}
  99#endif
 100
 101static const struct file_operations cirrus_driver_fops = {
 102        .owner = THIS_MODULE,
 103        .open = drm_open,
 104        .release = drm_release,
 105        .unlocked_ioctl = drm_ioctl,
 106        .mmap = cirrus_mmap,
 107        .poll = drm_poll,
 108        .compat_ioctl = drm_compat_ioctl,
 109};
 110static struct drm_driver driver = {
 111        .driver_features = DRIVER_MODESET | DRIVER_GEM,
 112        .load = cirrus_driver_load,
 113        .unload = cirrus_driver_unload,
 114        .fops = &cirrus_driver_fops,
 115        .name = DRIVER_NAME,
 116        .desc = DRIVER_DESC,
 117        .date = DRIVER_DATE,
 118        .major = DRIVER_MAJOR,
 119        .minor = DRIVER_MINOR,
 120        .patchlevel = DRIVER_PATCHLEVEL,
 121        .gem_free_object_unlocked = cirrus_gem_free_object,
 122        .dumb_create = cirrus_dumb_create,
 123        .dumb_map_offset = cirrus_dumb_mmap_offset,
 124};
 125
 126static const struct dev_pm_ops cirrus_pm_ops = {
 127        SET_SYSTEM_SLEEP_PM_OPS(cirrus_pm_suspend,
 128                                cirrus_pm_resume)
 129};
 130
 131static struct pci_driver cirrus_pci_driver = {
 132        .name = DRIVER_NAME,
 133        .id_table = pciidlist,
 134        .probe = cirrus_pci_probe,
 135        .remove = cirrus_pci_remove,
 136        .driver.pm = &cirrus_pm_ops,
 137};
 138
 139static int __init cirrus_init(void)
 140{
 141        if (vgacon_text_force() && cirrus_modeset == -1)
 142                return -EINVAL;
 143
 144        if (cirrus_modeset == 0)
 145                return -EINVAL;
 146        return pci_register_driver(&cirrus_pci_driver);
 147}
 148
 149static void __exit cirrus_exit(void)
 150{
 151        pci_unregister_driver(&cirrus_pci_driver);
 152}
 153
 154module_init(cirrus_init);
 155module_exit(cirrus_exit);
 156
 157MODULE_DEVICE_TABLE(pci, pciidlist);
 158MODULE_AUTHOR(DRIVER_AUTHOR);
 159MODULE_DESCRIPTION(DRIVER_DESC);
 160MODULE_LICENSE("GPL");
 161