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