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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 <linux/pm_runtime.h>
18#include "drm_fb_cma_helper.h"
19#include <drm/drm_fb_helper.h>
20
21#include "uapi/drm/vc4_drm.h"
22#include "vc4_drv.h"
23#include "vc4_regs.h"
24
25#define DRIVER_NAME "vc4"
26#define DRIVER_DESC "Broadcom VC4 graphics"
27#define DRIVER_DATE "20140616"
28#define DRIVER_MAJOR 0
29#define DRIVER_MINOR 0
30#define DRIVER_PATCHLEVEL 0
31
32/* Helper function for mapping the regs on a platform device. */
33void __iomem *vc4_ioremap_regs(struct platform_device *dev, int index)
34{
35 struct resource *res;
36 void __iomem *map;
37
38 res = platform_get_resource(dev, IORESOURCE_MEM, index);
39 map = devm_ioremap_resource(&dev->dev, res);
40 if (IS_ERR(map)) {
41 DRM_ERROR("Failed to map registers: %ld\n", PTR_ERR(map));
42 return map;
43 }
44
45 return map;
46}
47
48static int vc4_get_param_ioctl(struct drm_device *dev, void *data,
49 struct drm_file *file_priv)
50{
51 struct vc4_dev *vc4 = to_vc4_dev(dev);
52 struct drm_vc4_get_param *args = data;
53 int ret;
54
55 if (args->pad != 0)
56 return -EINVAL;
57
58 switch (args->param) {
59 case DRM_VC4_PARAM_V3D_IDENT0:
60 ret = pm_runtime_get_sync(&vc4->v3d->pdev->dev);
61 if (ret < 0)
62 return ret;
63 args->value = V3D_READ(V3D_IDENT0);
64 pm_runtime_mark_last_busy(&vc4->v3d->pdev->dev);
65 pm_runtime_put_autosuspend(&vc4->v3d->pdev->dev);
66 break;
67 case DRM_VC4_PARAM_V3D_IDENT1:
68 ret = pm_runtime_get_sync(&vc4->v3d->pdev->dev);
69 if (ret < 0)
70 return ret;
71 args->value = V3D_READ(V3D_IDENT1);
72 pm_runtime_mark_last_busy(&vc4->v3d->pdev->dev);
73 pm_runtime_put_autosuspend(&vc4->v3d->pdev->dev);
74 break;
75 case DRM_VC4_PARAM_V3D_IDENT2:
76 ret = pm_runtime_get_sync(&vc4->v3d->pdev->dev);
77 if (ret < 0)
78 return ret;
79 args->value = V3D_READ(V3D_IDENT2);
80 pm_runtime_mark_last_busy(&vc4->v3d->pdev->dev);
81 pm_runtime_put_autosuspend(&vc4->v3d->pdev->dev);
82 break;
83 case DRM_VC4_PARAM_SUPPORTS_BRANCHES:
84 case DRM_VC4_PARAM_SUPPORTS_ETC1:
85 case DRM_VC4_PARAM_SUPPORTS_THREADED_FS:
86 args->value = true;
87 break;
88 default:
89 DRM_DEBUG("Unknown parameter %d\n", args->param);
90 return -EINVAL;
91 }
92
93 return 0;
94}
95
96static void vc4_lastclose(struct drm_device *dev)
97{
98 struct vc4_dev *vc4 = to_vc4_dev(dev);
99
100 drm_fbdev_cma_restore_mode(vc4->fbdev);
101}
102
103static const struct file_operations vc4_drm_fops = {
104 .owner = THIS_MODULE,
105 .open = drm_open,
106 .release = drm_release,
107 .unlocked_ioctl = drm_ioctl,
108 .mmap = vc4_mmap,
109 .poll = drm_poll,
110 .read = drm_read,
111 .compat_ioctl = drm_compat_ioctl,
112 .llseek = noop_llseek,
113};
114
115static const struct drm_ioctl_desc vc4_drm_ioctls[] = {
116 DRM_IOCTL_DEF_DRV(VC4_SUBMIT_CL, vc4_submit_cl_ioctl, DRM_RENDER_ALLOW),
117 DRM_IOCTL_DEF_DRV(VC4_WAIT_SEQNO, vc4_wait_seqno_ioctl, DRM_RENDER_ALLOW),
118 DRM_IOCTL_DEF_DRV(VC4_WAIT_BO, vc4_wait_bo_ioctl, DRM_RENDER_ALLOW),
119 DRM_IOCTL_DEF_DRV(VC4_CREATE_BO, vc4_create_bo_ioctl, DRM_RENDER_ALLOW),
120 DRM_IOCTL_DEF_DRV(VC4_MMAP_BO, vc4_mmap_bo_ioctl, DRM_RENDER_ALLOW),
121 DRM_IOCTL_DEF_DRV(VC4_CREATE_SHADER_BO, vc4_create_shader_bo_ioctl, DRM_RENDER_ALLOW),
122 DRM_IOCTL_DEF_DRV(VC4_GET_HANG_STATE, vc4_get_hang_state_ioctl,
123 DRM_ROOT_ONLY),
124 DRM_IOCTL_DEF_DRV(VC4_GET_PARAM, vc4_get_param_ioctl, DRM_RENDER_ALLOW),
125};
126
127static struct drm_driver vc4_drm_driver = {
128 .driver_features = (DRIVER_MODESET |
129 DRIVER_ATOMIC |
130 DRIVER_GEM |
131 DRIVER_HAVE_IRQ |
132 DRIVER_RENDER |
133 DRIVER_PRIME),
134 .lastclose = vc4_lastclose,
135 .irq_handler = vc4_irq,
136 .irq_preinstall = vc4_irq_preinstall,
137 .irq_postinstall = vc4_irq_postinstall,
138 .irq_uninstall = vc4_irq_uninstall,
139
140 .enable_vblank = vc4_enable_vblank,
141 .disable_vblank = vc4_disable_vblank,
142 .get_vblank_counter = drm_vblank_no_hw_counter,
143 .get_scanout_position = vc4_crtc_get_scanoutpos,
144 .get_vblank_timestamp = vc4_crtc_get_vblank_timestamp,
145
146#if defined(CONFIG_DEBUG_FS)
147 .debugfs_init = vc4_debugfs_init,
148 .debugfs_cleanup = vc4_debugfs_cleanup,
149#endif
150
151 .gem_create_object = vc4_create_object,
152 .gem_free_object_unlocked = vc4_free_object,
153 .gem_vm_ops = &drm_gem_cma_vm_ops,
154
155 .prime_handle_to_fd = drm_gem_prime_handle_to_fd,
156 .prime_fd_to_handle = drm_gem_prime_fd_to_handle,
157 .gem_prime_import = drm_gem_prime_import,
158 .gem_prime_export = vc4_prime_export,
159 .gem_prime_get_sg_table = drm_gem_cma_prime_get_sg_table,
160 .gem_prime_import_sg_table = drm_gem_cma_prime_import_sg_table,
161 .gem_prime_vmap = vc4_prime_vmap,
162 .gem_prime_vunmap = drm_gem_cma_prime_vunmap,
163 .gem_prime_mmap = vc4_prime_mmap,
164
165 .dumb_create = vc4_dumb_create,
166 .dumb_map_offset = drm_gem_cma_dumb_map_offset,
167 .dumb_destroy = drm_gem_dumb_destroy,
168
169 .ioctls = vc4_drm_ioctls,
170 .num_ioctls = ARRAY_SIZE(vc4_drm_ioctls),
171 .fops = &vc4_drm_fops,
172
173 .name = DRIVER_NAME,
174 .desc = DRIVER_DESC,
175 .date = DRIVER_DATE,
176 .major = DRIVER_MAJOR,
177 .minor = DRIVER_MINOR,
178 .patchlevel = DRIVER_PATCHLEVEL,
179};
180
181static int compare_dev(struct device *dev, void *data)
182{
183 return dev == data;
184}
185
186static void vc4_match_add_drivers(struct device *dev,
187 struct component_match **match,
188 struct platform_driver *const *drivers,
189 int count)
190{
191 int i;
192
193 for (i = 0; i < count; i++) {
194 struct device_driver *drv = &drivers[i]->driver;
195 struct device *p = NULL, *d;
196
197 while ((d = bus_find_device(&platform_bus_type, p, drv,
198 (void *)platform_bus_type.match))) {
199 put_device(p);
200 component_match_add(dev, match, compare_dev, d);
201 p = d;
202 }
203 put_device(p);
204 }
205}
206
207static void vc4_kick_out_firmware_fb(void)
208{
209 struct apertures_struct *ap;
210
211 ap = alloc_apertures(1);
212 if (!ap)
213 return;
214
215 /* Since VC4 is a UMA device, the simplefb node may have been
216 * located anywhere in memory.
217 */
218 ap->ranges[0].base = 0;
219 ap->ranges[0].size = ~0;
220
221 drm_fb_helper_remove_conflicting_framebuffers(ap, "vc4drmfb", false);
222 kfree(ap);
223}
224
225static int vc4_drm_bind(struct device *dev)
226{
227 struct platform_device *pdev = to_platform_device(dev);
228 struct drm_device *drm;
229 struct vc4_dev *vc4;
230 int ret = 0;
231
232 dev->coherent_dma_mask = DMA_BIT_MASK(32);
233
234 vc4 = devm_kzalloc(dev, sizeof(*vc4), GFP_KERNEL);
235 if (!vc4)
236 return -ENOMEM;
237
238 drm = drm_dev_alloc(&vc4_drm_driver, dev);
239 if (IS_ERR(drm))
240 return PTR_ERR(drm);
241 platform_set_drvdata(pdev, drm);
242 vc4->dev = drm;
243 drm->dev_private = vc4;
244
245 vc4_bo_cache_init(drm);
246
247 drm_mode_config_init(drm);
248
249 vc4_gem_init(drm);
250
251 ret = component_bind_all(dev, drm);
252 if (ret)
253 goto gem_destroy;
254
255 vc4_kick_out_firmware_fb();
256
257 ret = drm_dev_register(drm, 0);
258 if (ret < 0)
259 goto unbind_all;
260
261 vc4_kms_load(drm);
262
263 return 0;
264
265unbind_all:
266 component_unbind_all(dev, drm);
267gem_destroy:
268 vc4_gem_destroy(drm);
269 drm_dev_unref(drm);
270 vc4_bo_cache_destroy(drm);
271 return ret;
272}
273
274static void vc4_drm_unbind(struct device *dev)
275{
276 struct platform_device *pdev = to_platform_device(dev);
277 struct drm_device *drm = platform_get_drvdata(pdev);
278 struct vc4_dev *vc4 = to_vc4_dev(drm);
279
280 drm_dev_unregister(drm);
281
282 if (vc4->fbdev)
283 drm_fbdev_cma_fini(vc4->fbdev);
284
285 drm_mode_config_cleanup(drm);
286
287 drm_dev_unref(drm);
288}
289
290static const struct component_master_ops vc4_drm_ops = {
291 .bind = vc4_drm_bind,
292 .unbind = vc4_drm_unbind,
293};
294
295static struct platform_driver *const component_drivers[] = {
296 &vc4_hdmi_driver,
297 &vc4_vec_driver,
298 &vc4_dpi_driver,
299 &vc4_hvs_driver,
300 &vc4_crtc_driver,
301 &vc4_v3d_driver,
302};
303
304static int vc4_platform_drm_probe(struct platform_device *pdev)
305{
306 struct component_match *match = NULL;
307 struct device *dev = &pdev->dev;
308
309 vc4_match_add_drivers(dev, &match,
310 component_drivers, ARRAY_SIZE(component_drivers));
311
312 return component_master_add_with_match(dev, &vc4_drm_ops, match);
313}
314
315static int vc4_platform_drm_remove(struct platform_device *pdev)
316{
317 component_master_del(&pdev->dev, &vc4_drm_ops);
318
319 return 0;
320}
321
322static const struct of_device_id vc4_of_match[] = {
323 { .compatible = "brcm,bcm2835-vc4", },
324 {},
325};
326MODULE_DEVICE_TABLE(of, vc4_of_match);
327
328static struct platform_driver vc4_platform_driver = {
329 .probe = vc4_platform_drm_probe,
330 .remove = vc4_platform_drm_remove,
331 .driver = {
332 .name = "vc4-drm",
333 .of_match_table = vc4_of_match,
334 },
335};
336
337static int __init vc4_drm_register(void)
338{
339 int i, ret;
340
341 for (i = 0; i < ARRAY_SIZE(component_drivers); i++) {
342 ret = platform_driver_register(component_drivers[i]);
343 if (ret) {
344 while (--i >= 0)
345 platform_driver_unregister(component_drivers[i]);
346 return ret;
347 }
348 }
349 return platform_driver_register(&vc4_platform_driver);
350}
351
352static void __exit vc4_drm_unregister(void)
353{
354 int i;
355
356 for (i = ARRAY_SIZE(component_drivers) - 1; i >= 0; i--)
357 platform_driver_unregister(component_drivers[i]);
358
359 platform_driver_unregister(&vc4_platform_driver);
360}
361
362module_init(vc4_drm_register);
363module_exit(vc4_drm_unregister);
364
365MODULE_ALIAS("platform:vc4-drm");
366MODULE_DESCRIPTION("Broadcom VC4 DRM Driver");
367MODULE_AUTHOR("Eric Anholt <eric@anholt.net>");
368MODULE_LICENSE("GPL v2");