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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/module.h>
33
34#include <drm/drmP.h>
35#include <drm/mga_drm.h>
36#include "mga_drv.h"
37
38#include <drm/drm_pciids.h>
39
40static int mga_driver_device_is_agp(struct drm_device *dev);
41
42static struct pci_device_id pciidlist[] = {
43	mga_PCI_IDS
44};
45
46static const struct file_operations mga_driver_fops = {
47	.owner = THIS_MODULE,
48	.open = drm_open,
49	.release = drm_release,
50	.unlocked_ioctl = drm_ioctl,
51	.mmap = drm_legacy_mmap,
52	.poll = drm_poll,
53#ifdef CONFIG_COMPAT
54	.compat_ioctl = mga_compat_ioctl,
55#endif
56	.llseek = noop_llseek,
57};
58
59static struct drm_driver driver = {
60	.driver_features =
61	    DRIVER_USE_AGP | DRIVER_PCI_DMA |
62	    DRIVER_HAVE_DMA | DRIVER_HAVE_IRQ | DRIVER_IRQ_SHARED,
63	.dev_priv_size = sizeof(drm_mga_buf_priv_t),
64	.load = mga_driver_load,
65	.unload = mga_driver_unload,
66	.lastclose = mga_driver_lastclose,
67	.set_busid = drm_pci_set_busid,
68	.dma_quiescent = mga_driver_dma_quiescent,
69	.device_is_agp = mga_driver_device_is_agp,
70	.get_vblank_counter = mga_get_vblank_counter,
71	.enable_vblank = mga_enable_vblank,
72	.disable_vblank = mga_disable_vblank,
73	.irq_preinstall = mga_driver_irq_preinstall,
74	.irq_postinstall = mga_driver_irq_postinstall,
75	.irq_uninstall = mga_driver_irq_uninstall,
76	.irq_handler = mga_driver_irq_handler,
77	.ioctls = mga_ioctls,
78	.dma_ioctl = mga_dma_buffers,
79	.fops = &mga_driver_fops,
80	.name = DRIVER_NAME,
81	.desc = DRIVER_DESC,
82	.date = DRIVER_DATE,
83	.major = DRIVER_MAJOR,
84	.minor = DRIVER_MINOR,
85	.patchlevel = DRIVER_PATCHLEVEL,
86};
87
88static struct pci_driver mga_pci_driver = {
89	.name = DRIVER_NAME,
90	.id_table = pciidlist,
91};
92
93static int __init mga_init(void)
94{
95	driver.num_ioctls = mga_max_ioctl;
96	return drm_pci_init(&driver, &mga_pci_driver);
97}
98
99static void __exit mga_exit(void)
100{
101	drm_pci_exit(&driver, &mga_pci_driver);
102}
103
104module_init(mga_init);
105module_exit(mga_exit);
106
107MODULE_AUTHOR(DRIVER_AUTHOR);
108MODULE_DESCRIPTION(DRIVER_DESC);
109MODULE_LICENSE("GPL and additional rights");
110
111/**
112 * Determine if the device really is AGP or not.
113 *
114 * In addition to the usual tests performed by \c drm_device_is_agp, this
115 * function detects PCI G450 cards that appear to the system exactly like
116 * AGP G450 cards.
117 *
118 * \param dev   The device to be tested.
119 *
120 * \returns
121 * If the device is a PCI G450, zero is returned.  Otherwise 2 is returned.
122 */
123static int mga_driver_device_is_agp(struct drm_device *dev)
124{
125	const struct pci_dev *const pdev = dev->pdev;
126
127	/* There are PCI versions of the G450.  These cards have the
128	 * same PCI ID as the AGP G450, but have an additional PCI-to-PCI
129	 * bridge chip.  We detect these cards, which are not currently
130	 * supported by this driver, by looking at the device ID of the
131	 * bus the "card" is on.  If vendor is 0x3388 (Hint Corp) and the
132	 * device is 0x0021 (HB6 Universal PCI-PCI bridge), we reject the
133	 * device.
134	 */
135
136	if ((pdev->device == 0x0525) && pdev->bus->self
137	    && (pdev->bus->self->vendor == 0x3388)
138	    && (pdev->bus->self->device == 0x0021)) {
139		return 0;
140	}
141
142	return 2;
143}
144