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/module.h>
 30#include <linux/pci.h>
 31
 32#include <drm/drm_aperture.h>
 33#include <drm/drm_atomic_helper.h>
 34#include <drm/drm_crtc_helper.h>
 35#include <drm/drm_drv.h>
 36#include <drm/drm_fbdev_generic.h>
 37#include <drm/drm_gem_shmem_helper.h>
 38#include <drm/drm_module.h>
 39#include <drm/drm_probe_helper.h>
 40
 41#include "ast_drv.h"
 42
 43static int ast_modeset = -1;
 44
 45MODULE_PARM_DESC(modeset, "Disable/Enable modesetting");
 46module_param_named(modeset, ast_modeset, int, 0400);
 47
 48/*
 49 * DRM driver
 50 */
 51
 52DEFINE_DRM_GEM_FOPS(ast_fops);
 53
 54static const struct drm_driver ast_driver = {
 55	.driver_features = DRIVER_ATOMIC |
 56			   DRIVER_GEM |
 57			   DRIVER_MODESET,
 58
 59	.fops = &ast_fops,
 60	.name = DRIVER_NAME,
 61	.desc = DRIVER_DESC,
 62	.date = DRIVER_DATE,
 63	.major = DRIVER_MAJOR,
 64	.minor = DRIVER_MINOR,
 65	.patchlevel = DRIVER_PATCHLEVEL,
 66
 67	DRM_GEM_SHMEM_DRIVER_OPS
 68};
 69
 70/*
 71 * PCI driver
 72 */
 73
 74#define PCI_VENDOR_ASPEED 0x1a03
 75
 76#define AST_VGA_DEVICE(id, info) {		\
 77	.class = PCI_BASE_CLASS_DISPLAY << 16,	\
 78	.class_mask = 0xff0000,			\
 79	.vendor = PCI_VENDOR_ASPEED,			\
 80	.device = id,				\
 81	.subvendor = PCI_ANY_ID,		\
 82	.subdevice = PCI_ANY_ID,		\
 83	.driver_data = (unsigned long) info }
 84
 85static const struct pci_device_id ast_pciidlist[] = {
 86	AST_VGA_DEVICE(PCI_CHIP_AST2000, NULL),
 87	AST_VGA_DEVICE(PCI_CHIP_AST2100, NULL),
 88	{0, 0, 0},
 89};
 90
 91MODULE_DEVICE_TABLE(pci, ast_pciidlist);
 92
 93static int ast_remove_conflicting_framebuffers(struct pci_dev *pdev)
 94{
 95	bool primary = false;
 96	resource_size_t base, size;
 97
 98	base = pci_resource_start(pdev, 0);
 99	size = pci_resource_len(pdev, 0);
100#ifdef CONFIG_X86
101	primary = pdev->resource[PCI_ROM_RESOURCE].flags & IORESOURCE_ROM_SHADOW;
102#endif
103
104	return drm_aperture_remove_conflicting_framebuffers(base, size, primary, &ast_driver);
105}
106
107static int ast_pci_probe(struct pci_dev *pdev, const struct pci_device_id *ent)
108{
109	struct ast_private *ast;
110	struct drm_device *dev;
111	int ret;
112
113	ret = ast_remove_conflicting_framebuffers(pdev);
114	if (ret)
115		return ret;
116
117	ret = pcim_enable_device(pdev);
118	if (ret)
119		return ret;
120
121	ast = ast_device_create(&ast_driver, pdev, ent->driver_data);
122	if (IS_ERR(ast))
123		return PTR_ERR(ast);
124	dev = &ast->base;
125
126	ret = drm_dev_register(dev, ent->driver_data);
127	if (ret)
128		return ret;
129
130	drm_fbdev_generic_setup(dev, 32);
131
132	return 0;
133}
134
135static void ast_pci_remove(struct pci_dev *pdev)
136{
137	struct drm_device *dev = pci_get_drvdata(pdev);
138
139	drm_dev_unregister(dev);
140	drm_atomic_helper_shutdown(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	if (pci_enable_device(to_pci_dev(dev->dev)))
164		return -EIO;
165
166	return ast_drm_thaw(dev);
167}
168
169static int ast_pm_suspend(struct device *dev)
170{
171	struct pci_dev *pdev = to_pci_dev(dev);
172	struct drm_device *ddev = pci_get_drvdata(pdev);
173	int error;
174
175	error = ast_drm_freeze(ddev);
176	if (error)
177		return error;
178
179	pci_disable_device(pdev);
180	pci_set_power_state(pdev, PCI_D3hot);
181	return 0;
182}
183
184static int ast_pm_resume(struct device *dev)
185{
186	struct pci_dev *pdev = to_pci_dev(dev);
187	struct drm_device *ddev = pci_get_drvdata(pdev);
188	return ast_drm_resume(ddev);
189}
190
191static int ast_pm_freeze(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_freeze(ddev);
196}
197
198static int ast_pm_thaw(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_thaw(ddev);
203}
204
205static int ast_pm_poweroff(struct device *dev)
206{
207	struct pci_dev *pdev = to_pci_dev(dev);
208	struct drm_device *ddev = pci_get_drvdata(pdev);
209
210	return ast_drm_freeze(ddev);
211}
212
213static const struct dev_pm_ops ast_pm_ops = {
214	.suspend = ast_pm_suspend,
215	.resume = ast_pm_resume,
216	.freeze = ast_pm_freeze,
217	.thaw = ast_pm_thaw,
218	.poweroff = ast_pm_poweroff,
219	.restore = ast_pm_resume,
220};
221
222static struct pci_driver ast_pci_driver = {
223	.name = DRIVER_NAME,
224	.id_table = ast_pciidlist,
225	.probe = ast_pci_probe,
226	.remove = ast_pci_remove,
227	.driver.pm = &ast_pm_ops,
228};
229
230drm_module_pci_driver_if_modeset(ast_pci_driver, ast_modeset);
231
232MODULE_AUTHOR(DRIVER_AUTHOR);
233MODULE_DESCRIPTION(DRIVER_DESC);
234MODULE_LICENSE("GPL and additional rights");