1/*
  2 * Copyright (C) 2014-2015 Broadcom
  3 * Copyright (C) 2013 Red Hat
  4 *
  5 * This program is free software; you can redistribute it and/or modify
  6 * it under the terms of the GNU General Public License version 2 as
  7 * published by the Free Software Foundation.
  8 */
  9
 10#include <linux/clk.h>
 11#include <linux/component.h>
 12#include <linux/device.h>
 13#include <linux/io.h>
 14#include <linux/module.h>
 15#include <linux/of_platform.h>
 16#include <linux/platform_device.h>
 17#include "drm_fb_cma_helper.h"
 18
 19#include "uapi/drm/vc4_drm.h"
 20#include "vc4_drv.h"
 21#include "vc4_regs.h"
 22
 23#define DRIVER_NAME "vc4"
 24#define DRIVER_DESC "Broadcom VC4 graphics"
 25#define DRIVER_DATE "20140616"
 26#define DRIVER_MAJOR 0
 27#define DRIVER_MINOR 0
 28#define DRIVER_PATCHLEVEL 0
 29
 30/* Helper function for mapping the regs on a platform device. */
 31void __iomem *vc4_ioremap_regs(struct platform_device *dev, int index)
 32{
 33	struct resource *res;
 34	void __iomem *map;
 35
 36	res = platform_get_resource(dev, IORESOURCE_MEM, index);
 37	map = devm_ioremap_resource(&dev->dev, res);
 38	if (IS_ERR(map)) {
 39		DRM_ERROR("Failed to map registers: %ld\n", PTR_ERR(map));
 40		return map;
 41	}
 42
 43	return map;
 44}
 45
 46static void vc4_lastclose(struct drm_device *dev)
 47{
 48	struct vc4_dev *vc4 = to_vc4_dev(dev);
 49
 50	if (vc4->fbdev)
 51		drm_fbdev_cma_restore_mode(vc4->fbdev);
 52}
 53
 54static const struct file_operations vc4_drm_fops = {
 55	.owner = THIS_MODULE,
 56	.open = drm_open,
 57	.release = drm_release,
 58	.unlocked_ioctl = drm_ioctl,
 59	.mmap = vc4_mmap,
 60	.poll = drm_poll,
 61	.read = drm_read,
 62#ifdef CONFIG_COMPAT
 63	.compat_ioctl = drm_compat_ioctl,
 64#endif
 65	.llseek = noop_llseek,
 66};
 67
 68static const struct drm_ioctl_desc vc4_drm_ioctls[] = {
 69	DRM_IOCTL_DEF_DRV(VC4_SUBMIT_CL, vc4_submit_cl_ioctl, 0),
 70	DRM_IOCTL_DEF_DRV(VC4_WAIT_SEQNO, vc4_wait_seqno_ioctl, 0),
 71	DRM_IOCTL_DEF_DRV(VC4_WAIT_BO, vc4_wait_bo_ioctl, 0),
 72	DRM_IOCTL_DEF_DRV(VC4_CREATE_BO, vc4_create_bo_ioctl, 0),
 73	DRM_IOCTL_DEF_DRV(VC4_MMAP_BO, vc4_mmap_bo_ioctl, 0),
 74	DRM_IOCTL_DEF_DRV(VC4_CREATE_SHADER_BO, vc4_create_shader_bo_ioctl, 0),
 75	DRM_IOCTL_DEF_DRV(VC4_GET_HANG_STATE, vc4_get_hang_state_ioctl,
 76			  DRM_ROOT_ONLY),
 77};
 78
 79static struct drm_driver vc4_drm_driver = {
 80	.driver_features = (DRIVER_MODESET |
 81			    DRIVER_ATOMIC |
 82			    DRIVER_GEM |
 83			    DRIVER_HAVE_IRQ |
 84			    DRIVER_PRIME),
 85	.lastclose = vc4_lastclose,
 86	.irq_handler = vc4_irq,
 87	.irq_preinstall = vc4_irq_preinstall,
 88	.irq_postinstall = vc4_irq_postinstall,
 89	.irq_uninstall = vc4_irq_uninstall,
 90
 91	.enable_vblank = vc4_enable_vblank,
 92	.disable_vblank = vc4_disable_vblank,
 93	.get_vblank_counter = drm_vblank_count,
 94
 95#if defined(CONFIG_DEBUG_FS)
 96	.debugfs_init = vc4_debugfs_init,
 97	.debugfs_cleanup = vc4_debugfs_cleanup,
 98#endif
 99
100	.gem_create_object = vc4_create_object,
101	.gem_free_object = vc4_free_object,
102	.gem_vm_ops = &drm_gem_cma_vm_ops,
103
104	.prime_handle_to_fd = drm_gem_prime_handle_to_fd,
105	.prime_fd_to_handle = drm_gem_prime_fd_to_handle,
106	.gem_prime_import = drm_gem_prime_import,
107	.gem_prime_export = vc4_prime_export,
108	.gem_prime_get_sg_table	= drm_gem_cma_prime_get_sg_table,
109	.gem_prime_import_sg_table = drm_gem_cma_prime_import_sg_table,
110	.gem_prime_vmap = vc4_prime_vmap,
111	.gem_prime_vunmap = drm_gem_cma_prime_vunmap,
112	.gem_prime_mmap = vc4_prime_mmap,
113
114	.dumb_create = vc4_dumb_create,
115	.dumb_map_offset = drm_gem_cma_dumb_map_offset,
116	.dumb_destroy = drm_gem_dumb_destroy,
117
118	.ioctls = vc4_drm_ioctls,
119	.num_ioctls = ARRAY_SIZE(vc4_drm_ioctls),
120	.fops = &vc4_drm_fops,
121
122	.name = DRIVER_NAME,
123	.desc = DRIVER_DESC,
124	.date = DRIVER_DATE,
125	.major = DRIVER_MAJOR,
126	.minor = DRIVER_MINOR,
127	.patchlevel = DRIVER_PATCHLEVEL,
128};
129
130static int compare_dev(struct device *dev, void *data)
131{
132	return dev == data;
133}
134
135static void vc4_match_add_drivers(struct device *dev,
136				  struct component_match **match,
137				  struct platform_driver *const *drivers,
138				  int count)
139{
140	int i;
141
142	for (i = 0; i < count; i++) {
143		struct device_driver *drv = &drivers[i]->driver;
144		struct device *p = NULL, *d;
145
146		while ((d = bus_find_device(&platform_bus_type, p, drv,
147					    (void *)platform_bus_type.match))) {
148			put_device(p);
149			component_match_add(dev, match, compare_dev, d);
150			p = d;
151		}
152		put_device(p);
153	}
154}
155
156static int vc4_drm_bind(struct device *dev)
157{
158	struct platform_device *pdev = to_platform_device(dev);
159	struct drm_device *drm;
160	struct drm_connector *connector;
161	struct vc4_dev *vc4;
162	int ret = 0;
163
164	dev->coherent_dma_mask = DMA_BIT_MASK(32);
165
166	vc4 = devm_kzalloc(dev, sizeof(*vc4), GFP_KERNEL);
167	if (!vc4)
168		return -ENOMEM;
169
170	drm = drm_dev_alloc(&vc4_drm_driver, dev);
171	if (!drm)
172		return -ENOMEM;
173	platform_set_drvdata(pdev, drm);
174	vc4->dev = drm;
175	drm->dev_private = vc4;
176
177	vc4_bo_cache_init(drm);
178
179	drm_mode_config_init(drm);
180	if (ret)
181		goto unref;
182
183	vc4_gem_init(drm);
184
185	ret = component_bind_all(dev, drm);
186	if (ret)
187		goto gem_destroy;
188
189	ret = drm_dev_register(drm, 0);
190	if (ret < 0)
191		goto unbind_all;
192
193	/* Connector registration has to occur after DRM device
194	 * registration, because it creates sysfs entries based on the
195	 * DRM device.
196	 */
197	list_for_each_entry(connector, &drm->mode_config.connector_list, head) {
198		ret = drm_connector_register(connector);
199		if (ret)
200			goto unregister;
201	}
202
203	vc4_kms_load(drm);
204
205	return 0;
206
207unregister:
208	drm_dev_unregister(drm);
209unbind_all:
210	component_unbind_all(dev, drm);
211gem_destroy:
212	vc4_gem_destroy(drm);
213unref:
214	drm_dev_unref(drm);
215	vc4_bo_cache_destroy(drm);
216	return ret;
217}
218
219static void vc4_drm_unbind(struct device *dev)
220{
221	struct platform_device *pdev = to_platform_device(dev);
222	struct drm_device *drm = platform_get_drvdata(pdev);
223	struct vc4_dev *vc4 = to_vc4_dev(drm);
224
225	if (vc4->fbdev)
226		drm_fbdev_cma_fini(vc4->fbdev);
227
228	drm_mode_config_cleanup(drm);
229
230	drm_put_dev(drm);
231}
232
233static const struct component_master_ops vc4_drm_ops = {
234	.bind = vc4_drm_bind,
235	.unbind = vc4_drm_unbind,
236};
237
238static struct platform_driver *const component_drivers[] = {
239	&vc4_hdmi_driver,
240	&vc4_crtc_driver,
241	&vc4_hvs_driver,
242	&vc4_v3d_driver,
243};
244
245static int vc4_platform_drm_probe(struct platform_device *pdev)
246{
247	struct component_match *match = NULL;
248	struct device *dev = &pdev->dev;
249
250	vc4_match_add_drivers(dev, &match,
251			      component_drivers, ARRAY_SIZE(component_drivers));
252
253	return component_master_add_with_match(dev, &vc4_drm_ops, match);
254}
255
256static int vc4_platform_drm_remove(struct platform_device *pdev)
257{
258	component_master_del(&pdev->dev, &vc4_drm_ops);
259
260	return 0;
261}
262
263static const struct of_device_id vc4_of_match[] = {
264	{ .compatible = "brcm,bcm2835-vc4", },
265	{},
266};
267MODULE_DEVICE_TABLE(of, vc4_of_match);
268
269static struct platform_driver vc4_platform_driver = {
270	.probe		= vc4_platform_drm_probe,
271	.remove		= vc4_platform_drm_remove,
272	.driver		= {
273		.name	= "vc4-drm",
274		.of_match_table = vc4_of_match,
275	},
276};
277
278static int __init vc4_drm_register(void)
279{
280	int i, ret;
281
282	for (i = 0; i < ARRAY_SIZE(component_drivers); i++) {
283		ret = platform_driver_register(component_drivers[i]);
284		if (ret) {
285			while (--i >= 0)
286				platform_driver_unregister(component_drivers[i]);
287			return ret;
288		}
289	}
290	return platform_driver_register(&vc4_platform_driver);
291}
292
293static void __exit vc4_drm_unregister(void)
294{
295	int i;
296
297	for (i = ARRAY_SIZE(component_drivers) - 1; i >= 0; i--)
298		platform_driver_unregister(component_drivers[i]);
299
300	platform_driver_unregister(&vc4_platform_driver);
301}
302
303module_init(vc4_drm_register);
304module_exit(vc4_drm_unregister);
305
306MODULE_ALIAS("platform:vc4-drm");
307MODULE_DESCRIPTION("Broadcom VC4 DRM Driver");
308MODULE_AUTHOR("Eric Anholt <eric@anholt.net>");
309MODULE_LICENSE("GPL v2");