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 int cirrus_bpp = 24;
  20
  21 MODULE_PARM_DESC(modeset, "Disable/Enable modesetting");
  22 module_param_named(modeset, cirrus_modeset, int, 0400);
  23 MODULE_PARM_DESC(bpp, "Max bits-per-pixel (default:24)");
  24 module_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
  32 static struct drm_driver driver;
  33
  34 /* only bind to the cirrus chip in qemu */
  35 static const struct pci_device_id pciidlist[] = {
  36         { PCI_VENDOR_ID_CIRRUS, PCI_DEVICE_ID_CIRRUS_5446, 0x1af4, 0x1100, 0,
  37           0, 0 },
  38         { PCI_VENDOR_ID_CIRRUS, PCI_DEVICE_ID_CIRRUS_5446, PCI_VENDOR_ID_XEN,
  39           0x0001, 0, 0, 0 },
  40         {0,}
  41 };
  42
  43
  44 static int cirrus_kick_out_firmware_fb(struct pci_dev *pdev)
  45 {
  46         struct apertures_struct *ap;
  47         bool primary = false;
  48
  49         ap = alloc_apertures(1);
  50         if (!ap)
  51                 return -ENOMEM;
  52
  53         ap->ranges[0].base = pci_resource_start(pdev, 0);
  54         ap->ranges[0].size = pci_resource_len(pdev, 0);
  55
  56 #ifdef CONFIG_X86
  57         primary = pdev->resource[PCI_ROM_RESOURCE].flags & IORESOURCE_ROM_SHADOW;
  58 #endif
  59         remove_conflicting_framebuffers(ap, "cirrusdrmfb", primary);
  60         kfree(ap);
  61
  62         return 0;
  63 }
  64
  65 static int cirrus_pci_probe(struct pci_dev *pdev,
  66                             const struct pci_device_id *ent)
  67 {
  68         int ret;
  69
  70         ret = cirrus_kick_out_firmware_fb(pdev);
  71         if (ret)
  72                 return ret;
  73
  74         return drm_get_pci_dev(pdev, ent, &driver);
  75 }
  76
  77 static void cirrus_pci_remove(struct pci_dev *pdev)
  78 {
  79         struct drm_device *dev = pci_get_drvdata(pdev);
  80
  81         drm_put_dev(dev);
  82 }
  83
  84 #ifdef CONFIG_PM_SLEEP
  85 static int cirrus_pm_suspend(struct device *dev)
  86 {
  87         struct pci_dev *pdev = to_pci_dev(dev);
  88         struct drm_device *drm_dev = pci_get_drvdata(pdev);
  89         struct cirrus_device *cdev = drm_dev->dev_private;
  90
  91         drm_kms_helper_poll_disable(drm_dev);
  92
  93         if (cdev->mode_info.gfbdev) {
  94                 console_lock();
  95                 fb_set_suspend(cdev->mode_info.gfbdev->helper.fbdev, 1);
  96                 console_unlock();
  97         }
  98
  99         return 0;
 100 }
 101
 102 static int cirrus_pm_resume(struct device *dev)
 103 {
 104         struct pci_dev *pdev = to_pci_dev(dev);
 105         struct drm_device *drm_dev = pci_get_drvdata(pdev);
 106         struct cirrus_device *cdev = drm_dev->dev_private;
 107
 108         drm_helper_resume_force_mode(drm_dev);
 109
 110         if (cdev->mode_info.gfbdev) {
 111                 console_lock();
 112                 fb_set_suspend(cdev->mode_info.gfbdev->helper.fbdev, 0);
 113                 console_unlock();
 114         }
 115
 116         drm_kms_helper_poll_enable(drm_dev);
 117         return 0;
 118 }
 119 #endif
 120
 121 static const struct file_operations cirrus_driver_fops = {
 122         .owner = THIS_MODULE,
 123         .open = drm_open,
 124         .release = drm_release,
 125         .unlocked_ioctl = drm_ioctl,
 126         .mmap = cirrus_mmap,
 127         .poll = drm_poll,
 128 #ifdef CONFIG_COMPAT
 129         .compat_ioctl = drm_compat_ioctl,
 130 #endif
 131 };
 132 static struct drm_driver driver = {
 133         .driver_features = DRIVER_MODESET | DRIVER_GEM,
 134         .load = cirrus_driver_load,
 135         .unload = cirrus_driver_unload,
 136         .set_busid = drm_pci_set_busid,
 137         .fops = &cirrus_driver_fops,
 138         .name = DRIVER_NAME,
 139         .desc = DRIVER_DESC,
 140         .date = DRIVER_DATE,
 141         .major = DRIVER_MAJOR,
 142         .minor = DRIVER_MINOR,
 143         .patchlevel = DRIVER_PATCHLEVEL,
 144         .gem_free_object = cirrus_gem_free_object,
 145         .dumb_create = cirrus_dumb_create,
 146         .dumb_map_offset = cirrus_dumb_mmap_offset,
 147         .dumb_destroy = drm_gem_dumb_destroy,
 148 };
 149
 150 static const struct dev_pm_ops cirrus_pm_ops = {
 151         SET_SYSTEM_SLEEP_PM_OPS(cirrus_pm_suspend,
 152                                 cirrus_pm_resume)
 153 };
 154
 155 static struct pci_driver cirrus_pci_driver = {
 156         .name = DRIVER_NAME,
 157         .id_table = pciidlist,
 158         .probe = cirrus_pci_probe,
 159         .remove = cirrus_pci_remove,
 160         .driver.pm = &cirrus_pm_ops,
 161 };
 162
 163 static int __init cirrus_init(void)
 164 {
 165 #ifdef CONFIG_VGA_CONSOLE
 166         if (vgacon_text_force() && cirrus_modeset == -1)
 167                 return -EINVAL;
 168 #endif
 169
 170         if (cirrus_modeset == 0)
 171                 return -EINVAL;
 172         return drm_pci_init(&driver, &cirrus_pci_driver);
 173 }
 174
 175 static void __exit cirrus_exit(void)
 176 {
 177         drm_pci_exit(&driver, &cirrus_pci_driver);
 178 }
 179
 180 module_init(cirrus_init);
 181 module_exit(cirrus_exit);
 182
 183 MODULE_DEVICE_TABLE(pci, pciidlist);
 184 MODULE_AUTHOR(DRIVER_AUTHOR);
 185 MODULE_DESCRIPTION(DRIVER_DESC);
 186 MODULE_LICENSE("GPL");