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_aperture.h>
 34#include <drm/drm_atomic_helper.h>
 35#include <drm/drm_crtc_helper.h>
 36#include <drm/drm_drv.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 const 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 int ast_remove_conflicting_framebuffers(struct pci_dev *pdev)
 93{
 94	bool primary = false;
 95	resource_size_t base, size;
 96
 97	base = pci_resource_start(pdev, 0);
 98	size = pci_resource_len(pdev, 0);
 99#ifdef CONFIG_X86
100	primary = pdev->resource[PCI_ROM_RESOURCE].flags & IORESOURCE_ROM_SHADOW;
101#endif
102
103	return drm_aperture_remove_conflicting_framebuffers(base, size, primary, "astdrmfb");
104}
105
106static int ast_pci_probe(struct pci_dev *pdev, const struct pci_device_id *ent)
107{
108	struct ast_private *ast;
109	struct drm_device *dev;
110	int ret;
111
112	ret = ast_remove_conflicting_framebuffers(pdev);
113	if (ret)
114		return ret;
115
116	ret = pcim_enable_device(pdev);
117	if (ret)
118		return ret;
119
120	ast = ast_device_create(&ast_driver, pdev, ent->driver_data);
121	if (IS_ERR(ast))
122		return PTR_ERR(ast);
123	dev = &ast->base;
124
125	ret = drm_dev_register(dev, ent->driver_data);
126	if (ret)
127		return ret;
128
129	drm_fbdev_generic_setup(dev, 32);
130
131	return 0;
132}
133
134static void ast_pci_remove(struct pci_dev *pdev)
135{
136	struct drm_device *dev = pci_get_drvdata(pdev);
137
138	drm_dev_unregister(dev);
139	drm_atomic_helper_shutdown(dev);
140}
141
142static int ast_drm_freeze(struct drm_device *dev)
143{
144	int error;
145
146	error = drm_mode_config_helper_suspend(dev);
147	if (error)
148		return error;
149	pci_save_state(to_pci_dev(dev->dev));
150	return 0;
151}
152
153static int ast_drm_thaw(struct drm_device *dev)
154{
155	ast_post_gpu(dev);
156
157	return drm_mode_config_helper_resume(dev);
158}
159
160static int ast_drm_resume(struct drm_device *dev)
161{
162	int ret;
163
164	if (pci_enable_device(to_pci_dev(dev->dev)))
165		return -EIO;
166
167	ret = ast_drm_thaw(dev);
168	if (ret)
169		return ret;
170	return 0;
171}
172
173static int ast_pm_suspend(struct device *dev)
174{
175	struct pci_dev *pdev = to_pci_dev(dev);
176	struct drm_device *ddev = pci_get_drvdata(pdev);
177	int error;
178
179	error = ast_drm_freeze(ddev);
180	if (error)
181		return error;
182
183	pci_disable_device(pdev);
184	pci_set_power_state(pdev, PCI_D3hot);
185	return 0;
186}
187
188static int ast_pm_resume(struct device *dev)
189{
190	struct pci_dev *pdev = to_pci_dev(dev);
191	struct drm_device *ddev = pci_get_drvdata(pdev);
192	return ast_drm_resume(ddev);
193}
194
195static int ast_pm_freeze(struct device *dev)
196{
197	struct pci_dev *pdev = to_pci_dev(dev);
198	struct drm_device *ddev = pci_get_drvdata(pdev);
199	return ast_drm_freeze(ddev);
200}
201
202static int ast_pm_thaw(struct device *dev)
203{
204	struct pci_dev *pdev = to_pci_dev(dev);
205	struct drm_device *ddev = pci_get_drvdata(pdev);
206	return ast_drm_thaw(ddev);
207}
208
209static int ast_pm_poweroff(struct device *dev)
210{
211	struct pci_dev *pdev = to_pci_dev(dev);
212	struct drm_device *ddev = pci_get_drvdata(pdev);
213
214	return ast_drm_freeze(ddev);
215}
216
217static const struct dev_pm_ops ast_pm_ops = {
218	.suspend = ast_pm_suspend,
219	.resume = ast_pm_resume,
220	.freeze = ast_pm_freeze,
221	.thaw = ast_pm_thaw,
222	.poweroff = ast_pm_poweroff,
223	.restore = ast_pm_resume,
224};
225
226static struct pci_driver ast_pci_driver = {
227	.name = DRIVER_NAME,
228	.id_table = ast_pciidlist,
229	.probe = ast_pci_probe,
230	.remove = ast_pci_remove,
231	.driver.pm = &ast_pm_ops,
232};
233
234static int __init ast_init(void)
235{
236	if (vgacon_text_force() && ast_modeset == -1)
237		return -EINVAL;
238
239	if (ast_modeset == 0)
240		return -EINVAL;
241	return pci_register_driver(&ast_pci_driver);
242}
243static void __exit ast_exit(void)
244{
245	pci_unregister_driver(&ast_pci_driver);
246}
247
248module_init(ast_init);
249module_exit(ast_exit);
250
251MODULE_AUTHOR(DRIVER_AUTHOR);
252MODULE_DESCRIPTION(DRIVER_DESC);
253MODULE_LICENSE("GPL and additional rights");