1 /*
2 * Copyright 2012 Red Hat <mjg@redhat.com>
3 *
4 * This file is subject to the terms and conditions of the GNU General
5 * Public License version 2. See the file COPYING in the main
6 * directory of this archive for more details.
7 *
8 * Authors: Matthew Garrett
9 * Dave Airlie
10 */
11 #include <linux/module.h>
12 #include <linux/console.h>
13 #include <drm/drmP.h>
14
15 #include "cirrus_drv.h"
16
17 int cirrus_modeset = -1;
18
19 MODULE_PARM_DESC(modeset, "Disable/Enable modesetting");
20 module_param_named(modeset, cirrus_modeset, int, 0400);
21
22 /*
23 * This is the generic driver code. This binds the driver to the drm core,
24 * which then performs further device association and calls our graphics init
25 * functions
26 */
27
28 static struct drm_driver driver;
29
30 /* only bind to the cirrus chip in qemu */
31 static DEFINE_PCI_DEVICE_TABLE(pciidlist) = {
32 { PCI_VENDOR_ID_CIRRUS, PCI_DEVICE_ID_CIRRUS_5446, 0x1af4, 0x1100, 0,
33 0, 0 },
34 {0,}
35 };
36
37
cirrus_kick_out_firmware_fb(struct pci_dev * pdev)38 static int cirrus_kick_out_firmware_fb(struct pci_dev *pdev)
39 {
40 struct apertures_struct *ap;
41 bool primary = false;
42
43 ap = alloc_apertures(1);
44 if (!ap)
45 return -ENOMEM;
46
47 ap->ranges[0].base = pci_resource_start(pdev, 0);
48 ap->ranges[0].size = pci_resource_len(pdev, 0);
49
50 #ifdef CONFIG_X86
51 primary = pdev->resource[PCI_ROM_RESOURCE].flags & IORESOURCE_ROM_SHADOW;
52 #endif
53 remove_conflicting_framebuffers(ap, "cirrusdrmfb", primary);
54 kfree(ap);
55
56 return 0;
57 }
58
cirrus_pci_probe(struct pci_dev * pdev,const struct pci_device_id * ent)59 static int cirrus_pci_probe(struct pci_dev *pdev,
60 const struct pci_device_id *ent)
61 {
62 int ret;
63
64 ret = cirrus_kick_out_firmware_fb(pdev);
65 if (ret)
66 return ret;
67
68 return drm_get_pci_dev(pdev, ent, &driver);
69 }
70
cirrus_pci_remove(struct pci_dev * pdev)71 static void cirrus_pci_remove(struct pci_dev *pdev)
72 {
73 struct drm_device *dev = pci_get_drvdata(pdev);
74
75 drm_put_dev(dev);
76 }
77
78 static const struct file_operations cirrus_driver_fops = {
79 .owner = THIS_MODULE,
80 .open = drm_open,
81 .release = drm_release,
82 .unlocked_ioctl = drm_ioctl,
83 .mmap = cirrus_mmap,
84 .poll = drm_poll,
85 #ifdef CONFIG_COMPAT
86 .compat_ioctl = drm_compat_ioctl,
87 #endif
88 .fasync = drm_fasync,
89 };
90 static struct drm_driver driver = {
91 .driver_features = DRIVER_MODESET | DRIVER_GEM | DRIVER_USE_MTRR,
92 .load = cirrus_driver_load,
93 .unload = cirrus_driver_unload,
94 .fops = &cirrus_driver_fops,
95 .name = DRIVER_NAME,
96 .desc = DRIVER_DESC,
97 .date = DRIVER_DATE,
98 .major = DRIVER_MAJOR,
99 .minor = DRIVER_MINOR,
100 .patchlevel = DRIVER_PATCHLEVEL,
101 .gem_init_object = cirrus_gem_init_object,
102 .gem_free_object = cirrus_gem_free_object,
103 .dumb_create = cirrus_dumb_create,
104 .dumb_map_offset = cirrus_dumb_mmap_offset,
105 .dumb_destroy = cirrus_dumb_destroy,
106 };
107
108 static struct pci_driver cirrus_pci_driver = {
109 .name = DRIVER_NAME,
110 .id_table = pciidlist,
111 .probe = cirrus_pci_probe,
112 .remove = cirrus_pci_remove,
113 };
114
cirrus_init(void)115 static int __init cirrus_init(void)
116 {
117 #ifdef CONFIG_VGA_CONSOLE
118 if (vgacon_text_force() && cirrus_modeset == -1)
119 return -EINVAL;
120 #endif
121
122 if (cirrus_modeset == 0)
123 return -EINVAL;
124 return drm_pci_init(&driver, &cirrus_pci_driver);
125 }
126
cirrus_exit(void)127 static void __exit cirrus_exit(void)
128 {
129 drm_pci_exit(&driver, &cirrus_pci_driver);
130 }
131
132 module_init(cirrus_init);
133 module_exit(cirrus_exit);
134
135 MODULE_DEVICE_TABLE(pci, pciidlist);
136 MODULE_AUTHOR(DRIVER_AUTHOR);
137 MODULE_DESCRIPTION(DRIVER_DESC);
138 MODULE_LICENSE("GPL");
139