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