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 const struct pci_device_id pciidlist[] = {
  33         { PCI_VENDOR_ID_CIRRUS, PCI_DEVICE_ID_CIRRUS_5446, 0x1af4, 0x1100, 0,
  34           0, 0 },
  35         { PCI_VENDOR_ID_CIRRUS, PCI_DEVICE_ID_CIRRUS_5446, PCI_VENDOR_ID_XEN,
  36           0x0001, 0, 0, 0 },
  37         {0,}
  38 };
  39
  40
  41 static int cirrus_kick_out_firmware_fb(struct pci_dev *pdev)
  42 {
  43         struct apertures_struct *ap;
  44         bool primary = false;
  45
  46         ap = alloc_apertures(1);
  47         if (!ap)
  48                 return -ENOMEM;
  49
  50         ap->ranges[0].base = pci_resource_start(pdev, 0);
  51         ap->ranges[0].size = pci_resource_len(pdev, 0);
  52
  53 #ifdef CONFIG_X86
  54         primary = pdev->resource[PCI_ROM_RESOURCE].flags & IORESOURCE_ROM_SHADOW;
  55 #endif
  56         remove_conflicting_framebuffers(ap, "cirrusdrmfb", primary);
  57         kfree(ap);
  58
  59         return 0;
  60 }
  61
  62 static int cirrus_pci_probe(struct pci_dev *pdev,
  63                             const struct pci_device_id *ent)
  64 {
  65         int ret;
  66
  67         ret = cirrus_kick_out_firmware_fb(pdev);
  68         if (ret)
  69                 return ret;
  70
  71         return drm_get_pci_dev(pdev, ent, &driver);
  72 }
  73
  74 static void cirrus_pci_remove(struct pci_dev *pdev)
  75 {
  76         struct drm_device *dev = pci_get_drvdata(pdev);
  77
  78         drm_put_dev(dev);
  79 }
  80
  81 #ifdef CONFIG_PM_SLEEP
  82 static int cirrus_pm_suspend(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_kms_helper_poll_disable(drm_dev);
  89
  90         if (cdev->mode_info.gfbdev) {
  91                 console_lock();
  92                 fb_set_suspend(cdev->mode_info.gfbdev->helper.fbdev, 1);
  93                 console_unlock();
  94         }
  95
  96         return 0;
  97 }
  98
  99 static int cirrus_pm_resume(struct device *dev)
 100 {
 101         struct pci_dev *pdev = to_pci_dev(dev);
 102         struct drm_device *drm_dev = pci_get_drvdata(pdev);
 103         struct cirrus_device *cdev = drm_dev->dev_private;
 104
 105         drm_helper_resume_force_mode(drm_dev);
 106
 107         if (cdev->mode_info.gfbdev) {
 108                 console_lock();
 109                 fb_set_suspend(cdev->mode_info.gfbdev->helper.fbdev, 0);
 110                 console_unlock();
 111         }
 112
 113         drm_kms_helper_poll_enable(drm_dev);
 114         return 0;
 115 }
 116 #endif
 117
 118 static const struct file_operations cirrus_driver_fops = {
 119         .owner = THIS_MODULE,
 120         .open = drm_open,
 121         .release = drm_release,
 122         .unlocked_ioctl = drm_ioctl,
 123         .mmap = cirrus_mmap,
 124         .poll = drm_poll,
 125 #ifdef CONFIG_COMPAT
 126         .compat_ioctl = drm_compat_ioctl,
 127 #endif
 128 };
 129 static struct drm_driver driver = {
 130         .driver_features = DRIVER_MODESET | DRIVER_GEM,
 131         .load = cirrus_driver_load,
 132         .unload = cirrus_driver_unload,
 133         .set_busid = drm_pci_set_busid,
 134         .fops = &cirrus_driver_fops,
 135         .name = DRIVER_NAME,
 136         .desc = DRIVER_DESC,
 137         .date = DRIVER_DATE,
 138         .major = DRIVER_MAJOR,
 139         .minor = DRIVER_MINOR,
 140         .patchlevel = DRIVER_PATCHLEVEL,
 141         .gem_free_object = cirrus_gem_free_object,
 142         .dumb_create = cirrus_dumb_create,
 143         .dumb_map_offset = cirrus_dumb_mmap_offset,
 144         .dumb_destroy = drm_gem_dumb_destroy,
 145 };
 146
 147 static const struct dev_pm_ops cirrus_pm_ops = {
 148         SET_SYSTEM_SLEEP_PM_OPS(cirrus_pm_suspend,
 149                                 cirrus_pm_resume)
 150 };
 151
 152 static struct pci_driver cirrus_pci_driver = {
 153         .name = DRIVER_NAME,
 154         .id_table = pciidlist,
 155         .probe = cirrus_pci_probe,
 156         .remove = cirrus_pci_remove,
 157         .driver.pm = &cirrus_pm_ops,
 158 };
 159
 160 static int __init cirrus_init(void)
 161 {
 162 #ifdef CONFIG_VGA_CONSOLE
 163         if (vgacon_text_force() && cirrus_modeset == -1)
 164                 return -EINVAL;
 165 #endif
 166
 167         if (cirrus_modeset == 0)
 168                 return -EINVAL;
 169         return drm_pci_init(&driver, &cirrus_pci_driver);
 170 }
 171
 172 static void __exit cirrus_exit(void)
 173 {
 174         drm_pci_exit(&driver, &cirrus_pci_driver);
 175 }
 176
 177 module_init(cirrus_init);
 178 module_exit(cirrus_exit);
 179
 180 MODULE_DEVICE_TABLE(pci, pciidlist);
 181 MODULE_AUTHOR(DRIVER_AUTHOR);
 182 MODULE_DESCRIPTION(DRIVER_DESC);
 183 MODULE_LICENSE("GPL");