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 "drmP.h"
33#include "drm.h"
34#include "mga_drm.h"
35#include "mga_drv.h"
36
37#include "drm_pciids.h"
38
39static int mga_driver_device_is_agp(drm_device_t * dev);
40
41static struct pci_device_id pciidlist[] = {
42	mga_PCI_IDS
43};
44
45static struct drm_driver driver = {
46	.driver_features =
47	    DRIVER_USE_AGP | DRIVER_USE_MTRR | DRIVER_PCI_DMA |
48	    DRIVER_HAVE_DMA | DRIVER_HAVE_IRQ | DRIVER_IRQ_SHARED |
49	    DRIVER_IRQ_VBL,
50	.dev_priv_size = sizeof(drm_mga_buf_priv_t),
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
91static int __init mga_init(void)
92{
93	driver.num_ioctls = mga_max_ioctl;
94	return drm_init(&driver);
95}
96
97static void __exit mga_exit(void)
98{
99	drm_exit(&driver);
100}
101
102module_init(mga_init);
103module_exit(mga_exit);
104
105MODULE_AUTHOR(DRIVER_AUTHOR);
106MODULE_DESCRIPTION(DRIVER_DESC);
107MODULE_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 */
121static 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) && pdev->bus->self
135	    && (pdev->bus->self->vendor == 0x3388)
136	    && (pdev->bus->self->device == 0x0021)) {
137		return 0;
138	}
139
140	return 2;
141}
142