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