drivers/char/drm/mga_drv.c

   1 /* mga_drv.c -- Matrox G200/G400 driver -*- linux-c -*-
   2  * Created: Mon Dec 13 01:56:22 1999 by jhartmann@precisioninsight.com
   3  *
   4  * Copyright 1999 Precision Insight, Inc., Cedar Park, Texas.
   5  * Copyright 2000 VA Linux Systems, Inc., Sunnyvale, California.
   6  * All Rights Reserved.
   7  *
   8  * Permission is hereby granted, free of charge, to any person obtaining a
   9  * copy of this software and associated documentation files (the "Software"),
  10  * to deal in the Software without restriction, including without limitation
  11  * the rights to use, copy, modify, merge, publish, distribute, sublicense,
  12  * and/or sell copies of the Software, and to permit persons to whom the
  13  * Software is furnished to do so, subject to the following conditions:
  14  *
  15  * The above copyright notice and this permission notice (including the next
  16  * paragraph) shall be included in all copies or substantial portions of the
  17  * Software.
  18  *
  19  * THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
  20  * IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
  21  * FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT.  IN NO EVENT SHALL
  22  * VA LINUX SYSTEMS AND/OR ITS SUPPLIERS BE LIABLE FOR ANY CLAIM, DAMAGES OR
  23  * OTHER LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE,
  24  * ARISING FROM, OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR
  25  * OTHER DEALINGS IN THE SOFTWARE.
  26  *
  27  * Authors:
  28  *    Rickard E. (Rik) Faith <faith@valinux.com>
  29  *    Gareth Hughes <gareth@valinux.com>
  30  */
  31
  32 #include <linux/config.h>
  33 #include "drmP.h"
  34 #include "drm.h"
  35 #include "mga_drm.h"
  36 #include "mga_drv.h"
  37
  38 #include "drm_pciids.h"
  39
  40 static int mga_driver_device_is_agp(drm_device_t * dev);
  41
  42 static struct pci_device_id pciidlist[] = {
  43         mga_PCI_IDS
  44 };
  45
  46 static struct drm_driver driver = {
  47         .driver_features =
  48             DRIVER_USE_AGP | DRIVER_REQUIRE_AGP | DRIVER_USE_MTRR |
  49             DRIVER_HAVE_DMA | DRIVER_HAVE_IRQ | DRIVER_IRQ_SHARED |
  50             DRIVER_IRQ_VBL,
  51         .load = mga_driver_load,
  52         .unload = mga_driver_unload,
  53         .lastclose = mga_driver_lastclose,
  54         .dma_quiescent = mga_driver_dma_quiescent,
  55         .device_is_agp = mga_driver_device_is_agp,
  56         .vblank_wait = mga_driver_vblank_wait,
  57         .irq_preinstall = mga_driver_irq_preinstall,
  58         .irq_postinstall = mga_driver_irq_postinstall,
  59         .irq_uninstall = mga_driver_irq_uninstall,
  60         .irq_handler = mga_driver_irq_handler,
  61         .reclaim_buffers = drm_core_reclaim_buffers,
  62         .get_map_ofs = drm_core_get_map_ofs,
  63         .get_reg_ofs = drm_core_get_reg_ofs,
  64         .ioctls = mga_ioctls,
  65         .dma_ioctl = mga_dma_buffers,
  66         .fops = {
  67                  .owner = THIS_MODULE,
  68                  .open = drm_open,
  69                  .release = drm_release,
  70                  .ioctl = drm_ioctl,
  71                  .mmap = drm_mmap,
  72                  .poll = drm_poll,
  73                  .fasync = drm_fasync,
  74 #ifdef CONFIG_COMPAT
  75                  .compat_ioctl = mga_compat_ioctl,
  76 #endif
  77                  },
  78         .pci_driver = {
  79                  .name = DRIVER_NAME,
  80                  .id_table = pciidlist,
  81         },
  82
  83         .name = DRIVER_NAME,
  84         .desc = DRIVER_DESC,
  85         .date = DRIVER_DATE,
  86         .major = DRIVER_MAJOR,
  87         .minor = DRIVER_MINOR,
  88         .patchlevel = DRIVER_PATCHLEVEL,
  89 };
  90
  91 static int __init mga_init(void)
  92 {
  93         driver.num_ioctls = mga_max_ioctl;
  94         return drm_init(&driver);
  95 }
  96
  97 static void __exit mga_exit(void)
  98 {
  99         drm_exit(&driver);
 100 }
 101
 102 module_init(mga_init);
 103 module_exit(mga_exit);
 104
 105 MODULE_AUTHOR(DRIVER_AUTHOR);
 106 MODULE_DESCRIPTION(DRIVER_DESC);
 107 MODULE_LICENSE("GPL and additional rights");
 108
 109 /**
 110  * Determine if the device really is AGP or not.
 111  *
 112  * In addition to the usual tests performed by \c drm_device_is_agp, this
 113  * function detects PCI G450 cards that appear to the system exactly like
 114  * AGP G450 cards.
 115  *
 116  * \param dev   The device to be tested.
 117  *
 118  * \returns
 119  * If the device is a PCI G450, zero is returned.  Otherwise 2 is returned.
 120  */
 121 static int mga_driver_device_is_agp(drm_device_t * dev)
 122 {
 123         const struct pci_dev *const pdev = dev->pdev;
 124
 125         /* There are PCI versions of the G450.  These cards have the
 126          * same PCI ID as the AGP G450, but have an additional PCI-to-PCI
 127          * bridge chip.  We detect these cards, which are not currently
 128          * supported by this driver, by looking at the device ID of the
 129          * bus the "card" is on.  If vendor is 0x3388 (Hint Corp) and the
 130          * device is 0x0021 (HB6 Universal PCI-PCI bridge), we reject the
 131          * device.
 132          */
 133
 134         if ((pdev->device == 0x0525)
 135             && (pdev->bus->self->vendor == 0x3388)
 136             && (pdev->bus->self->device == 0x0021)) {
 137                 return 0;
 138         }
 139
 140         return 2;
 141 }