diff options
Diffstat (limited to 'drivers/char/drm/mga_drv.c')
| -rw-r--r-- | drivers/char/drm/mga_drv.c | 45 |
1 files changed, 45 insertions, 0 deletions
diff --git a/drivers/char/drm/mga_drv.c b/drivers/char/drm/mga_drv.c index 844cca9cb29..daabbba3b29 100644 --- a/drivers/char/drm/mga_drv.c +++ b/drivers/char/drm/mga_drv.c @@ -38,8 +38,15 @@ #include "drm_pciids.h" +static int mga_driver_device_is_agp(drm_device_t * dev); static int postinit( struct drm_device *dev, unsigned long flags ) { + drm_mga_private_t * const dev_priv = + (drm_mga_private_t *) dev->dev_private; + + dev_priv->mmio_base = pci_resource_start(dev->pdev, 1); + dev_priv->mmio_size = pci_resource_len(dev->pdev, 1); + dev->counters += 3; dev->types[6] = _DRM_STAT_IRQ; dev->types[7] = _DRM_STAT_PRIMARY; @@ -79,8 +86,11 @@ extern int mga_max_ioctl; static struct drm_driver driver = { .driver_features = DRIVER_USE_AGP | DRIVER_REQUIRE_AGP | DRIVER_USE_MTRR | DRIVER_HAVE_DMA | DRIVER_HAVE_IRQ | DRIVER_IRQ_SHARED | DRIVER_IRQ_VBL, + .preinit = mga_driver_preinit, + .postcleanup = mga_driver_postcleanup, .pretakedown = mga_driver_pretakedown, .dma_quiescent = mga_driver_dma_quiescent, + .device_is_agp = mga_driver_device_is_agp, .vblank_wait = mga_driver_vblank_wait, .irq_preinstall = mga_driver_irq_preinstall, .irq_postinstall = mga_driver_irq_postinstall, @@ -128,3 +138,38 @@ module_exit(mga_exit); MODULE_AUTHOR( DRIVER_AUTHOR ); MODULE_DESCRIPTION( DRIVER_DESC ); MODULE_LICENSE("GPL and additional rights"); + +/** + * Determine if the device really is AGP or not. + * + * In addition to the usual tests performed by \c drm_device_is_agp, this + * function detects PCI G450 cards that appear to the system exactly like + * AGP G450 cards. + * + * \param dev The device to be tested. + * + * \returns + * If the device is a PCI G450, zero is returned. Otherwise 2 is returned. + */ +int mga_driver_device_is_agp(drm_device_t * dev) +{ + const struct pci_dev * const pdev = dev->pdev; + + + /* There are PCI versions of the G450. These cards have the + * same PCI ID as the AGP G450, but have an additional PCI-to-PCI + * bridge chip. We detect these cards, which are not currently + * supported by this driver, by looking at the device ID of the + * bus the "card" is on. If vendor is 0x3388 (Hint Corp) and the + * device is 0x0021 (HB6 Universal PCI-PCI bridge), we reject the + * device. + */ + + if ( (pdev->device == 0x0525) + && (pdev->bus->self->vendor == 0x3388) + && (pdev->bus->self->device == 0x0021) ) { + return 0; + } + + return 2; +} |