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
 18int cirrus_modeset = -1;
 19int cirrus_bpp = 24;
 20
 21MODULE_PARM_DESC(modeset, "Disable/Enable modesetting");
 22module_param_named(modeset, cirrus_modeset, int, 0400);
 23MODULE_PARM_DESC(bpp, "Max bits-per-pixel (default:24)");
 24module_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
 32static struct drm_driver driver;
 33
 34/* only bind to the cirrus chip in qemu */
 35static 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
 45static 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
 66static 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
 78static 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
 86static 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
103static 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
122static 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	.compat_ioctl = drm_compat_ioctl,
130};
131static struct drm_driver driver = {
132	.driver_features = DRIVER_MODESET | DRIVER_GEM,
133	.load = cirrus_driver_load,
134	.unload = cirrus_driver_unload,
135	.fops = &cirrus_driver_fops,
136	.name = DRIVER_NAME,
137	.desc = DRIVER_DESC,
138	.date = DRIVER_DATE,
139	.major = DRIVER_MAJOR,
140	.minor = DRIVER_MINOR,
141	.patchlevel = DRIVER_PATCHLEVEL,
142	.gem_free_object_unlocked = cirrus_gem_free_object,
143	.dumb_create = cirrus_dumb_create,
144	.dumb_map_offset = cirrus_dumb_mmap_offset,
145};
146
147static const struct dev_pm_ops cirrus_pm_ops = {
148	SET_SYSTEM_SLEEP_PM_OPS(cirrus_pm_suspend,
149				cirrus_pm_resume)
150};
151
152static struct pci_driver cirrus_pci_driver = {
153	.name = DRIVER_NAME,
154	.id_table = pciidlist,
155	.probe = cirrus_pci_probe,
156	.remove = cirrus_pci_remove,
157	.driver.pm = &cirrus_pm_ops,
158};
159
160static int __init cirrus_init(void)
161{
162	if (vgacon_text_force() && cirrus_modeset == -1)
163		return -EINVAL;
164
165	if (cirrus_modeset == 0)
166		return -EINVAL;
167	return pci_register_driver(&cirrus_pci_driver);
168}
169
170static void __exit cirrus_exit(void)
171{
172	pci_unregister_driver(&cirrus_pci_driver);
173}
174
175module_init(cirrus_init);
176module_exit(cirrus_exit);
177
178MODULE_DEVICE_TABLE(pci, pciidlist);
179MODULE_AUTHOR(DRIVER_AUTHOR);
180MODULE_DESCRIPTION(DRIVER_DESC);
181MODULE_LICENSE("GPL");