drivers/gpu/drm/cirrus/cirrus_drv.c

   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
  18 int cirrus_modeset = -1;
  19
  20 MODULE_PARM_DESC(modeset, "Disable/Enable modesetting");
  21 module_param_named(modeset, cirrus_modeset, int, 0400);
  22
  23 /*
  24  * This is the generic driver code. This binds the driver to the drm core,
  25  * which then performs further device association and calls our graphics init
  26  * functions
  27  */
  28
  29 static struct drm_driver driver;
  30
  31 /* only bind to the cirrus chip in qemu */
  32 static DEFINE_PCI_DEVICE_TABLE(pciidlist) = {
  33         { PCI_VENDOR_ID_CIRRUS, PCI_DEVICE_ID_CIRRUS_5446, 0x1af4, 0x1100, 0,
  34           0, 0 },
  35         {0,}
  36 };
  37
  38
  39 static int cirrus_kick_out_firmware_fb(struct pci_dev *pdev)
  40 {
  41         struct apertures_struct *ap;
  42         bool primary = false;
  43
  44         ap = alloc_apertures(1);
  45         if (!ap)
  46                 return -ENOMEM;
  47
  48         ap->ranges[0].base = pci_resource_start(pdev, 0);
  49         ap->ranges[0].size = pci_resource_len(pdev, 0);
  50
  51 #ifdef CONFIG_X86
  52         primary = pdev->resource[PCI_ROM_RESOURCE].flags & IORESOURCE_ROM_SHADOW;
  53 #endif
  54         remove_conflicting_framebuffers(ap, "cirrusdrmfb", primary);
  55         kfree(ap);
  56
  57         return 0;
  58 }
  59
  60 static int cirrus_pci_probe(struct pci_dev *pdev,
  61                             const struct pci_device_id *ent)
  62 {
  63         int ret;
  64
  65         ret = cirrus_kick_out_firmware_fb(pdev);
  66         if (ret)
  67                 return ret;
  68
  69         return drm_get_pci_dev(pdev, ent, &driver);
  70 }
  71
  72 static void cirrus_pci_remove(struct pci_dev *pdev)
  73 {
  74         struct drm_device *dev = pci_get_drvdata(pdev);
  75
  76         drm_put_dev(dev);
  77 }
  78
  79 static int cirrus_pm_suspend(struct device *dev)
  80 {
  81         struct pci_dev *pdev = to_pci_dev(dev);
  82         struct drm_device *drm_dev = pci_get_drvdata(pdev);
  83         struct cirrus_device *cdev = drm_dev->dev_private;
  84
  85         drm_kms_helper_poll_disable(drm_dev);
  86
  87         if (cdev->mode_info.gfbdev) {
  88                 console_lock();
  89                 fb_set_suspend(cdev->mode_info.gfbdev->helper.fbdev, 1);
  90                 console_unlock();
  91         }
  92
  93         return 0;
  94 }
  95
  96 static int cirrus_pm_resume(struct device *dev)
  97 {
  98         struct pci_dev *pdev = to_pci_dev(dev);
  99         struct drm_device *drm_dev = pci_get_drvdata(pdev);
 100         struct cirrus_device *cdev = drm_dev->dev_private;
 101
 102         drm_helper_resume_force_mode(drm_dev);
 103
 104         if (cdev->mode_info.gfbdev) {
 105                 console_lock();
 106                 fb_set_suspend(cdev->mode_info.gfbdev->helper.fbdev, 0);
 107                 console_unlock();
 108         }
 109
 110         drm_kms_helper_poll_enable(drm_dev);
 111         return 0;
 112 }
 113
 114 static const struct file_operations cirrus_driver_fops = {
 115         .owner = THIS_MODULE,
 116         .open = drm_open,
 117         .release = drm_release,
 118         .unlocked_ioctl = drm_ioctl,
 119         .mmap = cirrus_mmap,
 120         .poll = drm_poll,
 121 #ifdef CONFIG_COMPAT
 122         .compat_ioctl = drm_compat_ioctl,
 123 #endif
 124 };
 125 static struct drm_driver driver = {
 126         .driver_features = DRIVER_MODESET | DRIVER_GEM,
 127         .load = cirrus_driver_load,
 128         .unload = cirrus_driver_unload,
 129         .fops = &cirrus_driver_fops,
 130         .name = DRIVER_NAME,
 131         .desc = DRIVER_DESC,
 132         .date = DRIVER_DATE,
 133         .major = DRIVER_MAJOR,
 134         .minor = DRIVER_MINOR,
 135         .patchlevel = DRIVER_PATCHLEVEL,
 136         .gem_init_object = cirrus_gem_init_object,
 137         .gem_free_object = cirrus_gem_free_object,
 138         .dumb_create = cirrus_dumb_create,
 139         .dumb_map_offset = cirrus_dumb_mmap_offset,
 140         .dumb_destroy = drm_gem_dumb_destroy,
 141 };
 142
 143 static const struct dev_pm_ops cirrus_pm_ops = {
 144         SET_SYSTEM_SLEEP_PM_OPS(cirrus_pm_suspend,
 145                                 cirrus_pm_resume)
 146 };
 147
 148 static struct pci_driver cirrus_pci_driver = {
 149         .name = DRIVER_NAME,
 150         .id_table = pciidlist,
 151         .probe = cirrus_pci_probe,
 152         .remove = cirrus_pci_remove,
 153         .driver.pm = &cirrus_pm_ops,
 154 };
 155
 156 static int __init cirrus_init(void)
 157 {
 158 #ifdef CONFIG_VGA_CONSOLE
 159         if (vgacon_text_force() && cirrus_modeset == -1)
 160                 return -EINVAL;
 161 #endif
 162
 163         if (cirrus_modeset == 0)
 164                 return -EINVAL;
 165         return drm_pci_init(&driver, &cirrus_pci_driver);
 166 }
 167
 168 static void __exit cirrus_exit(void)
 169 {
 170         drm_pci_exit(&driver, &cirrus_pci_driver);
 171 }
 172
 173 module_init(cirrus_init);
 174 module_exit(cirrus_exit);
 175
 176 MODULE_DEVICE_TABLE(pci, pciidlist);
 177 MODULE_AUTHOR(DRIVER_AUTHOR);
 178 MODULE_DESCRIPTION(DRIVER_DESC);
 179 MODULE_LICENSE("GPL");