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_atomic_helper.h>
34#include <drm/drm_crtc_helper.h>
35#include <drm/drm_drv.h>
36#include <drm/drm_fb_helper.h>
37#include <drm/drm_gem_vram_helper.h>
38#include <drm/drm_probe_helper.h>
39
40#include "ast_drv.h"
41
42int ast_modeset = -1;
43
44MODULE_PARM_DESC(modeset, "Disable/Enable modesetting");
45module_param_named(modeset, ast_modeset, int, 0400);
46
47/*
48 * DRM driver
49 */
50
51DEFINE_DRM_GEM_FOPS(ast_fops);
52
53static struct drm_driver ast_driver = {
54	.driver_features = DRIVER_ATOMIC |
55			   DRIVER_GEM |
56			   DRIVER_MODESET,
57
58	.fops = &ast_fops,
59	.name = DRIVER_NAME,
60	.desc = DRIVER_DESC,
61	.date = DRIVER_DATE,
62	.major = DRIVER_MAJOR,
63	.minor = DRIVER_MINOR,
64	.patchlevel = DRIVER_PATCHLEVEL,
65
66	DRM_GEM_VRAM_DRIVER
67};
68
69/*
70 * PCI driver
71 */
72
73#define PCI_VENDOR_ASPEED 0x1a03
74
75#define AST_VGA_DEVICE(id, info) {		\
76	.class = PCI_BASE_CLASS_DISPLAY << 16,	\
77	.class_mask = 0xff0000,			\
78	.vendor = PCI_VENDOR_ASPEED,			\
79	.device = id,				\
80	.subvendor = PCI_ANY_ID,		\
81	.subdevice = PCI_ANY_ID,		\
82	.driver_data = (unsigned long) info }
83
84static const struct pci_device_id ast_pciidlist[] = {
85	AST_VGA_DEVICE(PCI_CHIP_AST2000, NULL),
86	AST_VGA_DEVICE(PCI_CHIP_AST2100, NULL),
87	{0, 0, 0},
88};
89
90MODULE_DEVICE_TABLE(pci, ast_pciidlist);
91
92static void ast_kick_out_firmware_fb(struct pci_dev *pdev)
93{
94	struct apertures_struct *ap;
95	bool primary = false;
96
97	ap = alloc_apertures(1);
98	if (!ap)
99		return;
100
101	ap->ranges[0].base = pci_resource_start(pdev, 0);
102	ap->ranges[0].size = pci_resource_len(pdev, 0);
103
104#ifdef CONFIG_X86
105	primary = pdev->resource[PCI_ROM_RESOURCE].flags & IORESOURCE_ROM_SHADOW;
106#endif
107	drm_fb_helper_remove_conflicting_framebuffers(ap, "astdrmfb", primary);
108	kfree(ap);
109}
110
111static int ast_pci_probe(struct pci_dev *pdev, const struct pci_device_id *ent)
112{
113	struct ast_private *ast;
114	struct drm_device *dev;
115	int ret;
116
117	ast_kick_out_firmware_fb(pdev);
118
119	ret = pcim_enable_device(pdev);
120	if (ret)
121		return ret;
122
123	ast = ast_device_create(&ast_driver, pdev, ent->driver_data);
124	if (IS_ERR(ast))
125		return PTR_ERR(ast);
126	dev = &ast->base;
127
128	ret = drm_dev_register(dev, ent->driver_data);
129	if (ret)
130		return ret;
131
132	drm_fbdev_generic_setup(dev, 32);
133
134	return 0;
135}
136
137static void ast_pci_remove(struct pci_dev *pdev)
138{
139	struct drm_device *dev = pci_get_drvdata(pdev);
140
141	drm_dev_unregister(dev);
142	drm_atomic_helper_shutdown(dev);
143}
144
145static int ast_drm_freeze(struct drm_device *dev)
146{
147	int error;
148
149	error = drm_mode_config_helper_suspend(dev);
150	if (error)
151		return error;
152	pci_save_state(dev->pdev);
153	return 0;
154}
155
156static int ast_drm_thaw(struct drm_device *dev)
157{
158	ast_post_gpu(dev);
159
160	return drm_mode_config_helper_resume(dev);
161}
162
163static int ast_drm_resume(struct drm_device *dev)
164{
165	int ret;
166
167	if (pci_enable_device(dev->pdev))
168		return -EIO;
169
170	ret = ast_drm_thaw(dev);
171	if (ret)
172		return ret;
173	return 0;
174}
175
176static int ast_pm_suspend(struct device *dev)
177{
178	struct pci_dev *pdev = to_pci_dev(dev);
179	struct drm_device *ddev = pci_get_drvdata(pdev);
180	int error;
181
182	error = ast_drm_freeze(ddev);
183	if (error)
184		return error;
185
186	pci_disable_device(pdev);
187	pci_set_power_state(pdev, PCI_D3hot);
188	return 0;
189}
190
191static int ast_pm_resume(struct device *dev)
192{
193	struct pci_dev *pdev = to_pci_dev(dev);
194	struct drm_device *ddev = pci_get_drvdata(pdev);
195	return ast_drm_resume(ddev);
196}
197
198static int ast_pm_freeze(struct device *dev)
199{
200	struct pci_dev *pdev = to_pci_dev(dev);
201	struct drm_device *ddev = pci_get_drvdata(pdev);
202	return ast_drm_freeze(ddev);
203}
204
205static int ast_pm_thaw(struct device *dev)
206{
207	struct pci_dev *pdev = to_pci_dev(dev);
208	struct drm_device *ddev = pci_get_drvdata(pdev);
209	return ast_drm_thaw(ddev);
210}
211
212static int ast_pm_poweroff(struct device *dev)
213{
214	struct pci_dev *pdev = to_pci_dev(dev);
215	struct drm_device *ddev = pci_get_drvdata(pdev);
216
217	return ast_drm_freeze(ddev);
218}
219
220static const struct dev_pm_ops ast_pm_ops = {
221	.suspend = ast_pm_suspend,
222	.resume = ast_pm_resume,
223	.freeze = ast_pm_freeze,
224	.thaw = ast_pm_thaw,
225	.poweroff = ast_pm_poweroff,
226	.restore = ast_pm_resume,
227};
228
229static struct pci_driver ast_pci_driver = {
230	.name = DRIVER_NAME,
231	.id_table = ast_pciidlist,
232	.probe = ast_pci_probe,
233	.remove = ast_pci_remove,
234	.driver.pm = &ast_pm_ops,
235};
236
237static int __init ast_init(void)
238{
239	if (vgacon_text_force() && ast_modeset == -1)
240		return -EINVAL;
241
242	if (ast_modeset == 0)
243		return -EINVAL;
244	return pci_register_driver(&ast_pci_driver);
245}
246static void __exit ast_exit(void)
247{
248	pci_unregister_driver(&ast_pci_driver);
249}
250
251module_init(ast_init);
252module_exit(ast_exit);
253
254MODULE_AUTHOR(DRIVER_AUTHOR);
255MODULE_DESCRIPTION(DRIVER_DESC);
256MODULE_LICENSE("GPL and additional rights");
257