GNU Linux-libre 4.9.326-gnu1
[releases.git] / drivers / gpu / drm / cirrus / cirrus_drv.c
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 #include <drm/drm_crtc_helper.h>
15
16 #include "cirrus_drv.h"
17
18 int cirrus_modeset = -1;
19 int cirrus_bpp = 24;
20
21 MODULE_PARM_DESC(modeset, "Disable/Enable modesetting");
22 module_param_named(modeset, cirrus_modeset, int, 0400);
23 MODULE_PARM_DESC(bpp, "Max bits-per-pixel (default:24)");
24 module_param_named(bpp, cirrus_bpp, int, 0400);
25
26 /*
27  * This is the generic driver code. This binds the driver to the drm core,
28  * which then performs further device association and calls our graphics init
29  * functions
30  */
31
32 static struct drm_driver driver;
33
34 /* only bind to the cirrus chip in qemu */
35 static const struct pci_device_id pciidlist[] = {
36         { PCI_VENDOR_ID_CIRRUS, PCI_DEVICE_ID_CIRRUS_5446,
37           PCI_SUBVENDOR_ID_REDHAT_QUMRANET, PCI_SUBDEVICE_ID_QEMU,
38           0, 0, 0 },
39         { PCI_VENDOR_ID_CIRRUS, PCI_DEVICE_ID_CIRRUS_5446, PCI_VENDOR_ID_XEN,
40           0x0001, 0, 0, 0 },
41         {0,}
42 };
43
44
45 static int cirrus_kick_out_firmware_fb(struct pci_dev *pdev)
46 {
47         struct apertures_struct *ap;
48         bool primary = false;
49
50         ap = alloc_apertures(1);
51         if (!ap)
52                 return -ENOMEM;
53
54         ap->ranges[0].base = pci_resource_start(pdev, 0);
55         ap->ranges[0].size = pci_resource_len(pdev, 0);
56
57 #ifdef CONFIG_X86
58         primary = pdev->resource[PCI_ROM_RESOURCE].flags & IORESOURCE_ROM_SHADOW;
59 #endif
60         drm_fb_helper_remove_conflicting_framebuffers(ap, "cirrusdrmfb", primary);
61         kfree(ap);
62
63         return 0;
64 }
65
66 static int cirrus_pci_probe(struct pci_dev *pdev,
67                             const struct pci_device_id *ent)
68 {
69         int ret;
70
71         ret = cirrus_kick_out_firmware_fb(pdev);
72         if (ret)
73                 return ret;
74
75         return drm_get_pci_dev(pdev, ent, &driver);
76 }
77
78 static void cirrus_pci_remove(struct pci_dev *pdev)
79 {
80         struct drm_device *dev = pci_get_drvdata(pdev);
81
82         drm_put_dev(dev);
83 }
84
85 #ifdef CONFIG_PM_SLEEP
86 static int cirrus_pm_suspend(struct device *dev)
87 {
88         struct pci_dev *pdev = to_pci_dev(dev);
89         struct drm_device *drm_dev = pci_get_drvdata(pdev);
90         struct cirrus_device *cdev = drm_dev->dev_private;
91
92         drm_kms_helper_poll_disable(drm_dev);
93
94         if (cdev->mode_info.gfbdev) {
95                 console_lock();
96                 drm_fb_helper_set_suspend(&cdev->mode_info.gfbdev->helper, 1);
97                 console_unlock();
98         }
99
100         return 0;
101 }
102
103 static int cirrus_pm_resume(struct device *dev)
104 {
105         struct pci_dev *pdev = to_pci_dev(dev);
106         struct drm_device *drm_dev = pci_get_drvdata(pdev);
107         struct cirrus_device *cdev = drm_dev->dev_private;
108
109         drm_helper_resume_force_mode(drm_dev);
110
111         if (cdev->mode_info.gfbdev) {
112                 console_lock();
113                 drm_fb_helper_set_suspend(&cdev->mode_info.gfbdev->helper, 0);
114                 console_unlock();
115         }
116
117         drm_kms_helper_poll_enable(drm_dev);
118         return 0;
119 }
120 #endif
121
122 static const struct file_operations cirrus_driver_fops = {
123         .owner = THIS_MODULE,
124         .open = drm_open,
125         .release = drm_release,
126         .unlocked_ioctl = drm_ioctl,
127         .mmap = cirrus_mmap,
128         .poll = drm_poll,
129 #ifdef CONFIG_COMPAT
130         .compat_ioctl = drm_compat_ioctl,
131 #endif
132 };
133 static struct drm_driver driver = {
134         .driver_features = DRIVER_MODESET | DRIVER_GEM,
135         .load = cirrus_driver_load,
136         .unload = cirrus_driver_unload,
137         .set_busid = drm_pci_set_busid,
138         .fops = &cirrus_driver_fops,
139         .name = DRIVER_NAME,
140         .desc = DRIVER_DESC,
141         .date = DRIVER_DATE,
142         .major = DRIVER_MAJOR,
143         .minor = DRIVER_MINOR,
144         .patchlevel = DRIVER_PATCHLEVEL,
145         .gem_free_object_unlocked = cirrus_gem_free_object,
146         .dumb_create = cirrus_dumb_create,
147         .dumb_map_offset = cirrus_dumb_mmap_offset,
148         .dumb_destroy = drm_gem_dumb_destroy,
149 };
150
151 static const struct dev_pm_ops cirrus_pm_ops = {
152         SET_SYSTEM_SLEEP_PM_OPS(cirrus_pm_suspend,
153                                 cirrus_pm_resume)
154 };
155
156 static struct pci_driver cirrus_pci_driver = {
157         .name = DRIVER_NAME,
158         .id_table = pciidlist,
159         .probe = cirrus_pci_probe,
160         .remove = cirrus_pci_remove,
161         .driver.pm = &cirrus_pm_ops,
162 };
163
164 static int __init cirrus_init(void)
165 {
166         if (vgacon_text_force() && cirrus_modeset == -1)
167                 return -EINVAL;
168
169         if (cirrus_modeset == 0)
170                 return -EINVAL;
171         return drm_pci_init(&driver, &cirrus_pci_driver);
172 }
173
174 static void __exit cirrus_exit(void)
175 {
176         drm_pci_exit(&driver, &cirrus_pci_driver);
177 }
178
179 module_init(cirrus_init);
180 module_exit(cirrus_exit);
181
182 MODULE_DEVICE_TABLE(pci, pciidlist);
183 MODULE_AUTHOR(DRIVER_AUTHOR);
184 MODULE_DESCRIPTION(DRIVER_DESC);
185 MODULE_LICENSE("GPL");