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mga_drv.c

/* mga_drv.c -- Matrox G200/G400 driver -*- linux-c -*-
 * Created: Mon Dec 13 01:56:22 1999 by jhartmann@precisioninsight.com
 *
 * Copyright 1999 Precision Insight, Inc., Cedar Park, Texas.
 * Copyright 2000 VA Linux Systems, Inc., Sunnyvale, California.
 * All Rights Reserved.
 *
 * Permission is hereby granted, free of charge, to any person obtaining a
 * copy of this software and associated documentation files (the "Software"),
 * to deal in the Software without restriction, including without limitation
 * the rights to use, copy, modify, merge, publish, distribute, sublicense,
 * and/or sell copies of the Software, and to permit persons to whom the
 * Software is furnished to do so, subject to the following conditions:
 *
 * The above copyright notice and this permission notice (including the next
 * paragraph) shall be included in all copies or substantial portions of the
 * Software.
 *
 * THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
 * IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
 * FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT.  IN NO EVENT SHALL
 * VA LINUX SYSTEMS AND/OR ITS SUPPLIERS BE LIABLE FOR ANY CLAIM, DAMAGES OR
 * OTHER LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE,
 * ARISING FROM, OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR
 * OTHER DEALINGS IN THE SOFTWARE.
 *
 * Authors:
 *    Rickard E. (Rik) Faith <faith@valinux.com>
 *    Gareth Hughes <gareth@valinux.com>
 */

#include "drmP.h"
#include "drm.h"
#include "mga_drm.h"
#include "mga_drv.h"

#include "drm_pciids.h"

static int mga_driver_device_is_agp(struct drm_device * dev);

static struct pci_device_id pciidlist[] = {
      mga_PCI_IDS
};

static struct drm_driver driver = {
      .driver_features =
          DRIVER_USE_AGP | DRIVER_USE_MTRR | DRIVER_PCI_DMA |
          DRIVER_HAVE_DMA | DRIVER_HAVE_IRQ | DRIVER_IRQ_SHARED |
          DRIVER_IRQ_VBL,
      .dev_priv_size = sizeof(drm_mga_buf_priv_t),
      .load = mga_driver_load,
      .unload = mga_driver_unload,
      .lastclose = mga_driver_lastclose,
      .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,
      .irq_uninstall = mga_driver_irq_uninstall,
      .irq_handler = mga_driver_irq_handler,
      .reclaim_buffers = drm_core_reclaim_buffers,
      .get_map_ofs = drm_core_get_map_ofs,
      .get_reg_ofs = drm_core_get_reg_ofs,
      .ioctls = mga_ioctls,
      .dma_ioctl = mga_dma_buffers,
      .fops = {
             .owner = THIS_MODULE,
             .open = drm_open,
             .release = drm_release,
             .ioctl = drm_ioctl,
             .mmap = drm_mmap,
             .poll = drm_poll,
             .fasync = drm_fasync,
#ifdef CONFIG_COMPAT
             .compat_ioctl = mga_compat_ioctl,
#endif
             },
      .pci_driver = {
             .name = DRIVER_NAME,
             .id_table = pciidlist,
      },

      .name = DRIVER_NAME,
      .desc = DRIVER_DESC,
      .date = DRIVER_DATE,
      .major = DRIVER_MAJOR,
      .minor = DRIVER_MINOR,
      .patchlevel = DRIVER_PATCHLEVEL,
};

static int __init mga_init(void)
{
      driver.num_ioctls = mga_max_ioctl;
      return drm_init(&driver);
}

static void __exit mga_exit(void)
{
      drm_exit(&driver);
}

module_init(mga_init);
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.
 */
static int mga_driver_device_is_agp(struct drm_device * 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
          && (pdev->bus->self->vendor == 0x3388)
          && (pdev->bus->self->device == 0x0021)) {
            return 0;
      }

      return 2;
}

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