tjh.dev
Linux kernel mirror (for testing)
git.kernel.org/pub/scm/linux/kernel/git/torvalds/linux.git
kernel
os
linux
1/*
2 * Copyright 2012 Red Hat Inc.
3 *
4 * Permission is hereby granted, free of charge, to any person obtaining a
5 * copy of this software and associated documentation files (the
6 * "Software"), to deal in the Software without restriction, including
7 * without limitation the rights to use, copy, modify, merge, publish,
8 * distribute, sub license, and/or sell copies of the Software, and to
9 * permit persons to whom the Software is furnished to do so, subject to
10 * the following conditions:
11 *
12 * THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
13 * IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
14 * FITNESS FOR A PARTICULAR PURPOSE AND NON-INFRINGEMENT. IN NO EVENT SHALL
15 * THE COPYRIGHT HOLDERS, AUTHORS AND/OR ITS SUPPLIERS BE LIABLE FOR ANY CLAIM,
16 * DAMAGES OR OTHER LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR
17 * OTHERWISE, ARISING FROM, OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE
18 * USE OR OTHER DEALINGS IN THE SOFTWARE.
19 *
20 * The above copyright notice and this permission notice (including the
21 * next paragraph) shall be included in all copies or substantial portions
22 * of the Software.
23 *
24 */
25/*
26 * Authors: Dave Airlie <airlied@redhat.com>
27 */
28
29#include <linux/console.h>
30#include <linux/module.h>
31#include <linux/pci.h>
32
33#include <drm/drm_crtc_helper.h>
34#include <drm/drm_drv.h>
35#include <drm/drm_fb_helper.h>
36#include <drm/drm_gem_vram_helper.h>
37#include <drm/drm_probe_helper.h>
38
39#include "ast_drv.h"
40
41int ast_modeset = -1;
42
43MODULE_PARM_DESC(modeset, "Disable/Enable modesetting");
44module_param_named(modeset, ast_modeset, int, 0400);
45
46/*
47 * DRM driver
48 */
49
50DEFINE_DRM_GEM_FOPS(ast_fops);
51
52static const struct drm_driver ast_driver = {
53 .driver_features = DRIVER_ATOMIC |
54 DRIVER_GEM |
55 DRIVER_MODESET,
56
57 .fops = &ast_fops,
58 .name = DRIVER_NAME,
59 .desc = DRIVER_DESC,
60 .date = DRIVER_DATE,
61 .major = DRIVER_MAJOR,
62 .minor = DRIVER_MINOR,
63 .patchlevel = DRIVER_PATCHLEVEL,
64
65 DRM_GEM_VRAM_DRIVER
66};
67
68/*
69 * PCI driver
70 */
71
72#define PCI_VENDOR_ASPEED 0x1a03
73
74#define AST_VGA_DEVICE(id, info) { \
75 .class = PCI_BASE_CLASS_DISPLAY << 16, \
76 .class_mask = 0xff0000, \
77 .vendor = PCI_VENDOR_ASPEED, \
78 .device = id, \
79 .subvendor = PCI_ANY_ID, \
80 .subdevice = PCI_ANY_ID, \
81 .driver_data = (unsigned long) info }
82
83static const struct pci_device_id ast_pciidlist[] = {
84 AST_VGA_DEVICE(PCI_CHIP_AST2000, NULL),
85 AST_VGA_DEVICE(PCI_CHIP_AST2100, NULL),
86 {0, 0, 0},
87};
88
89MODULE_DEVICE_TABLE(pci, ast_pciidlist);
90
91static void ast_kick_out_firmware_fb(struct pci_dev *pdev)
92{
93 struct apertures_struct *ap;
94 bool primary = false;
95
96 ap = alloc_apertures(1);
97 if (!ap)
98 return;
99
100 ap->ranges[0].base = pci_resource_start(pdev, 0);
101 ap->ranges[0].size = pci_resource_len(pdev, 0);
102
103#ifdef CONFIG_X86
104 primary = pdev->resource[PCI_ROM_RESOURCE].flags & IORESOURCE_ROM_SHADOW;
105#endif
106 drm_fb_helper_remove_conflicting_framebuffers(ap, "astdrmfb", primary);
107 kfree(ap);
108}
109
110static int ast_pci_probe(struct pci_dev *pdev, const struct pci_device_id *ent)
111{
112 struct ast_private *ast;
113 struct drm_device *dev;
114 int ret;
115
116 ast_kick_out_firmware_fb(pdev);
117
118 ret = pcim_enable_device(pdev);
119 if (ret)
120 return ret;
121
122 ast = ast_device_create(&ast_driver, pdev, ent->driver_data);
123 if (IS_ERR(ast))
124 return PTR_ERR(ast);
125 dev = &ast->base;
126
127 ret = drm_dev_register(dev, ent->driver_data);
128 if (ret)
129 return ret;
130
131 drm_fbdev_generic_setup(dev, 32);
132
133 return 0;
134}
135
136static void ast_pci_remove(struct pci_dev *pdev)
137{
138 struct drm_device *dev = pci_get_drvdata(pdev);
139
140 drm_dev_unregister(dev);
141}
142
143static int ast_drm_freeze(struct drm_device *dev)
144{
145 int error;
146
147 error = drm_mode_config_helper_suspend(dev);
148 if (error)
149 return error;
150 pci_save_state(to_pci_dev(dev->dev));
151 return 0;
152}
153
154static int ast_drm_thaw(struct drm_device *dev)
155{
156 ast_post_gpu(dev);
157
158 return drm_mode_config_helper_resume(dev);
159}
160
161static int ast_drm_resume(struct drm_device *dev)
162{
163 int ret;
164
165 if (pci_enable_device(to_pci_dev(dev->dev)))
166 return -EIO;
167
168 ret = ast_drm_thaw(dev);
169 if (ret)
170 return ret;
171 return 0;
172}
173
174static int ast_pm_suspend(struct device *dev)
175{
176 struct pci_dev *pdev = to_pci_dev(dev);
177 struct drm_device *ddev = pci_get_drvdata(pdev);
178 int error;
179
180 error = ast_drm_freeze(ddev);
181 if (error)
182 return error;
183
184 pci_disable_device(pdev);
185 pci_set_power_state(pdev, PCI_D3hot);
186 return 0;
187}
188
189static int ast_pm_resume(struct device *dev)
190{
191 struct pci_dev *pdev = to_pci_dev(dev);
192 struct drm_device *ddev = pci_get_drvdata(pdev);
193 return ast_drm_resume(ddev);
194}
195
196static int ast_pm_freeze(struct device *dev)
197{
198 struct pci_dev *pdev = to_pci_dev(dev);
199 struct drm_device *ddev = pci_get_drvdata(pdev);
200 return ast_drm_freeze(ddev);
201}
202
203static int ast_pm_thaw(struct device *dev)
204{
205 struct pci_dev *pdev = to_pci_dev(dev);
206 struct drm_device *ddev = pci_get_drvdata(pdev);
207 return ast_drm_thaw(ddev);
208}
209
210static int ast_pm_poweroff(struct device *dev)
211{
212 struct pci_dev *pdev = to_pci_dev(dev);
213 struct drm_device *ddev = pci_get_drvdata(pdev);
214
215 return ast_drm_freeze(ddev);
216}
217
218static const struct dev_pm_ops ast_pm_ops = {
219 .suspend = ast_pm_suspend,
220 .resume = ast_pm_resume,
221 .freeze = ast_pm_freeze,
222 .thaw = ast_pm_thaw,
223 .poweroff = ast_pm_poweroff,
224 .restore = ast_pm_resume,
225};
226
227static struct pci_driver ast_pci_driver = {
228 .name = DRIVER_NAME,
229 .id_table = ast_pciidlist,
230 .probe = ast_pci_probe,
231 .remove = ast_pci_remove,
232 .driver.pm = &ast_pm_ops,
233};
234
235static int __init ast_init(void)
236{
237 if (vgacon_text_force() && ast_modeset == -1)
238 return -EINVAL;
239
240 if (ast_modeset == 0)
241 return -EINVAL;
242 return pci_register_driver(&ast_pci_driver);
243}
244static void __exit ast_exit(void)
245{
246 pci_unregister_driver(&ast_pci_driver);
247}
248
249module_init(ast_init);
250module_exit(ast_exit);
251
252MODULE_AUTHOR(DRIVER_AUTHOR);
253MODULE_DESCRIPTION(DRIVER_DESC);
254MODULE_LICENSE("GPL and additional rights");