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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 "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. */ | |
31 | void __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 | ||
46 | static void vc4_drm_preclose(struct drm_device *dev, struct drm_file *file) | |
47 | { | |
48 | struct drm_crtc *crtc; | |
49 | ||
50 | list_for_each_entry(crtc, &dev->mode_config.crtc_list, head) | |
51 | vc4_cancel_page_flip(crtc, file); | |
52 | } | |
53 | ||
54 | static void vc4_lastclose(struct drm_device *dev) | |
55 | { | |
56 | struct vc4_dev *vc4 = to_vc4_dev(dev); | |
57 | ||
58 | if (vc4->fbdev) | |
59 | drm_fbdev_cma_restore_mode(vc4->fbdev); | |
60 | } | |
61 | ||
62 | static const struct file_operations vc4_drm_fops = { | |
63 | .owner = THIS_MODULE, | |
64 | .open = drm_open, | |
65 | .release = drm_release, | |
66 | .unlocked_ioctl = drm_ioctl, | |
67 | .mmap = vc4_mmap, | |
68 | .poll = drm_poll, | |
69 | .read = drm_read, | |
70 | #ifdef CONFIG_COMPAT | |
71 | .compat_ioctl = drm_compat_ioctl, | |
72 | #endif | |
73 | .llseek = noop_llseek, | |
74 | }; | |
75 | ||
76 | static const struct drm_ioctl_desc vc4_drm_ioctls[] = { | |
77 | DRM_IOCTL_DEF_DRV(VC4_SUBMIT_CL, vc4_submit_cl_ioctl, 0), | |
78 | DRM_IOCTL_DEF_DRV(VC4_WAIT_SEQNO, vc4_wait_seqno_ioctl, 0), | |
79 | DRM_IOCTL_DEF_DRV(VC4_WAIT_BO, vc4_wait_bo_ioctl, 0), | |
80 | DRM_IOCTL_DEF_DRV(VC4_CREATE_BO, vc4_create_bo_ioctl, 0), | |
81 | DRM_IOCTL_DEF_DRV(VC4_MMAP_BO, vc4_mmap_bo_ioctl, 0), | |
82 | DRM_IOCTL_DEF_DRV(VC4_CREATE_SHADER_BO, vc4_create_shader_bo_ioctl, 0), | |
83 | DRM_IOCTL_DEF_DRV(VC4_GET_HANG_STATE, vc4_get_hang_state_ioctl, | |
84 | DRM_ROOT_ONLY), | |
85 | }; | |
86 | ||
87 | static struct drm_driver vc4_drm_driver = { | |
88 | .driver_features = (DRIVER_MODESET | | |
89 | DRIVER_ATOMIC | | |
90 | DRIVER_GEM | | |
91 | DRIVER_HAVE_IRQ | | |
92 | DRIVER_PRIME), | |
93 | .lastclose = vc4_lastclose, | |
94 | .preclose = vc4_drm_preclose, | |
95 | ||
96 | .irq_handler = vc4_irq, | |
97 | .irq_preinstall = vc4_irq_preinstall, | |
98 | .irq_postinstall = vc4_irq_postinstall, | |
99 | .irq_uninstall = vc4_irq_uninstall, | |
100 | ||
101 | .enable_vblank = vc4_enable_vblank, | |
102 | .disable_vblank = vc4_disable_vblank, | |
103 | .get_vblank_counter = drm_vblank_count, | |
104 | ||
105 | #if defined(CONFIG_DEBUG_FS) | |
106 | .debugfs_init = vc4_debugfs_init, | |
107 | .debugfs_cleanup = vc4_debugfs_cleanup, | |
108 | #endif | |
109 | ||
110 | .gem_create_object = vc4_create_object, | |
111 | .gem_free_object = vc4_free_object, | |
112 | .gem_vm_ops = &drm_gem_cma_vm_ops, | |
113 | ||
114 | .prime_handle_to_fd = drm_gem_prime_handle_to_fd, | |
115 | .prime_fd_to_handle = drm_gem_prime_fd_to_handle, | |
116 | .gem_prime_import = drm_gem_prime_import, | |
117 | .gem_prime_export = vc4_prime_export, | |
118 | .gem_prime_get_sg_table = drm_gem_cma_prime_get_sg_table, | |
119 | .gem_prime_import_sg_table = drm_gem_cma_prime_import_sg_table, | |
120 | .gem_prime_vmap = vc4_prime_vmap, | |
121 | .gem_prime_vunmap = drm_gem_cma_prime_vunmap, | |
122 | .gem_prime_mmap = vc4_prime_mmap, | |
123 | ||
124 | .dumb_create = vc4_dumb_create, | |
125 | .dumb_map_offset = drm_gem_cma_dumb_map_offset, | |
126 | .dumb_destroy = drm_gem_dumb_destroy, | |
127 | ||
128 | .ioctls = vc4_drm_ioctls, | |
129 | .num_ioctls = ARRAY_SIZE(vc4_drm_ioctls), | |
130 | .fops = &vc4_drm_fops, | |
131 | ||
132 | .name = DRIVER_NAME, | |
133 | .desc = DRIVER_DESC, | |
134 | .date = DRIVER_DATE, | |
135 | .major = DRIVER_MAJOR, | |
136 | .minor = DRIVER_MINOR, | |
137 | .patchlevel = DRIVER_PATCHLEVEL, | |
138 | }; | |
139 | ||
140 | static int compare_dev(struct device *dev, void *data) | |
141 | { | |
142 | return dev == data; | |
143 | } | |
144 | ||
145 | static void vc4_match_add_drivers(struct device *dev, | |
146 | struct component_match **match, | |
147 | struct platform_driver *const *drivers, | |
148 | int count) | |
149 | { | |
150 | int i; | |
151 | ||
152 | for (i = 0; i < count; i++) { | |
153 | struct device_driver *drv = &drivers[i]->driver; | |
154 | struct device *p = NULL, *d; | |
155 | ||
156 | while ((d = bus_find_device(&platform_bus_type, p, drv, | |
157 | (void *)platform_bus_type.match))) { | |
158 | put_device(p); | |
159 | component_match_add(dev, match, compare_dev, d); | |
160 | p = d; | |
161 | } | |
162 | put_device(p); | |
163 | } | |
164 | } | |
165 | ||
166 | static int vc4_drm_bind(struct device *dev) | |
167 | { | |
168 | struct platform_device *pdev = to_platform_device(dev); | |
169 | struct drm_device *drm; | |
170 | struct drm_connector *connector; | |
171 | struct vc4_dev *vc4; | |
172 | int ret = 0; | |
173 | ||
174 | dev->coherent_dma_mask = DMA_BIT_MASK(32); | |
175 | ||
176 | vc4 = devm_kzalloc(dev, sizeof(*vc4), GFP_KERNEL); | |
177 | if (!vc4) | |
178 | return -ENOMEM; | |
179 | ||
180 | drm = drm_dev_alloc(&vc4_drm_driver, dev); | |
181 | if (!drm) | |
182 | return -ENOMEM; | |
183 | platform_set_drvdata(pdev, drm); | |
184 | vc4->dev = drm; | |
185 | drm->dev_private = vc4; | |
186 | ||
187 | drm_dev_set_unique(drm, dev_name(dev)); | |
188 | ||
189 | vc4_bo_cache_init(drm); | |
190 | ||
191 | drm_mode_config_init(drm); | |
192 | if (ret) | |
193 | goto unref; | |
194 | ||
195 | vc4_gem_init(drm); | |
196 | ||
197 | ret = component_bind_all(dev, drm); | |
198 | if (ret) | |
199 | goto gem_destroy; | |
200 | ||
201 | ret = drm_dev_register(drm, 0); | |
202 | if (ret < 0) | |
203 | goto unbind_all; | |
204 | ||
205 | /* Connector registration has to occur after DRM device | |
206 | * registration, because it creates sysfs entries based on the | |
207 | * DRM device. | |
208 | */ | |
209 | list_for_each_entry(connector, &drm->mode_config.connector_list, head) { | |
210 | ret = drm_connector_register(connector); | |
211 | if (ret) | |
212 | goto unregister; | |
213 | } | |
214 | ||
215 | vc4_kms_load(drm); | |
216 | ||
217 | return 0; | |
218 | ||
219 | unregister: | |
220 | drm_dev_unregister(drm); | |
221 | unbind_all: | |
222 | component_unbind_all(dev, drm); | |
223 | gem_destroy: | |
224 | vc4_gem_destroy(drm); | |
225 | unref: | |
226 | drm_dev_unref(drm); | |
227 | vc4_bo_cache_destroy(drm); | |
228 | return ret; | |
229 | } | |
230 | ||
231 | static void vc4_drm_unbind(struct device *dev) | |
232 | { | |
233 | struct platform_device *pdev = to_platform_device(dev); | |
234 | struct drm_device *drm = platform_get_drvdata(pdev); | |
235 | struct vc4_dev *vc4 = to_vc4_dev(drm); | |
236 | ||
237 | if (vc4->fbdev) | |
238 | drm_fbdev_cma_fini(vc4->fbdev); | |
239 | ||
240 | drm_mode_config_cleanup(drm); | |
241 | ||
242 | drm_put_dev(drm); | |
243 | } | |
244 | ||
245 | static const struct component_master_ops vc4_drm_ops = { | |
246 | .bind = vc4_drm_bind, | |
247 | .unbind = vc4_drm_unbind, | |
248 | }; | |
249 | ||
250 | static struct platform_driver *const component_drivers[] = { | |
251 | &vc4_hdmi_driver, | |
252 | &vc4_crtc_driver, | |
253 | &vc4_hvs_driver, | |
254 | &vc4_v3d_driver, | |
255 | }; | |
256 | ||
257 | static int vc4_platform_drm_probe(struct platform_device *pdev) | |
258 | { | |
259 | struct component_match *match = NULL; | |
260 | struct device *dev = &pdev->dev; | |
261 | ||
262 | vc4_match_add_drivers(dev, &match, | |
263 | component_drivers, ARRAY_SIZE(component_drivers)); | |
264 | ||
265 | return component_master_add_with_match(dev, &vc4_drm_ops, match); | |
266 | } | |
267 | ||
268 | static int vc4_platform_drm_remove(struct platform_device *pdev) | |
269 | { | |
270 | component_master_del(&pdev->dev, &vc4_drm_ops); | |
271 | ||
272 | return 0; | |
273 | } | |
274 | ||
275 | static const struct of_device_id vc4_of_match[] = { | |
276 | { .compatible = "brcm,bcm2835-vc4", }, | |
277 | {}, | |
278 | }; | |
279 | MODULE_DEVICE_TABLE(of, vc4_of_match); | |
280 | ||
281 | static struct platform_driver vc4_platform_driver = { | |
282 | .probe = vc4_platform_drm_probe, | |
283 | .remove = vc4_platform_drm_remove, | |
284 | .driver = { | |
285 | .name = "vc4-drm", | |
286 | .owner = THIS_MODULE, | |
287 | .of_match_table = vc4_of_match, | |
288 | }, | |
289 | }; | |
290 | ||
291 | static int __init vc4_drm_register(void) | |
292 | { | |
293 | int i, ret; | |
294 | ||
295 | for (i = 0; i < ARRAY_SIZE(component_drivers); i++) { | |
296 | ret = platform_driver_register(component_drivers[i]); | |
297 | if (ret) { | |
298 | while (--i >= 0) | |
299 | platform_driver_unregister(component_drivers[i]); | |
300 | return ret; | |
301 | } | |
302 | } | |
303 | return platform_driver_register(&vc4_platform_driver); | |
304 | } | |
305 | ||
306 | static void __exit vc4_drm_unregister(void) | |
307 | { | |
308 | int i; | |
309 | ||
310 | for (i = ARRAY_SIZE(component_drivers) - 1; i >= 0; i--) | |
311 | platform_driver_unregister(component_drivers[i]); | |
312 | ||
313 | platform_driver_unregister(&vc4_platform_driver); | |
314 | } | |
315 | ||
316 | module_init(vc4_drm_register); | |
317 | module_exit(vc4_drm_unregister); | |
318 | ||
319 | MODULE_ALIAS("platform:vc4-drm"); | |
320 | MODULE_DESCRIPTION("Broadcom VC4 DRM Driver"); | |
321 | MODULE_AUTHOR("Eric Anholt <eric@anholt.net>"); | |
322 | MODULE_LICENSE("GPL v2"); |