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_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 54 static 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 68 static const struct drm_ioctl_desc vc4_drm_ioctls[] = { 69 DRM_IOCTL_DEF_DRV(VC4_SUBMIT_CL, vc4_submit_cl_ioctl, DRM_RENDER_ALLOW), 70 DRM_IOCTL_DEF_DRV(VC4_WAIT_SEQNO, vc4_wait_seqno_ioctl, DRM_RENDER_ALLOW), 71 DRM_IOCTL_DEF_DRV(VC4_WAIT_BO, vc4_wait_bo_ioctl, DRM_RENDER_ALLOW), 72 DRM_IOCTL_DEF_DRV(VC4_CREATE_BO, vc4_create_bo_ioctl, DRM_RENDER_ALLOW), 73 DRM_IOCTL_DEF_DRV(VC4_MMAP_BO, vc4_mmap_bo_ioctl, DRM_RENDER_ALLOW), 74 DRM_IOCTL_DEF_DRV(VC4_CREATE_SHADER_BO, vc4_create_shader_bo_ioctl, DRM_RENDER_ALLOW), 75 DRM_IOCTL_DEF_DRV(VC4_GET_HANG_STATE, vc4_get_hang_state_ioctl, 76 DRM_ROOT_ONLY), 77 }; 78 79 static struct drm_driver vc4_drm_driver = { 80 .driver_features = (DRIVER_MODESET | 81 DRIVER_ATOMIC | 82 DRIVER_GEM | 83 DRIVER_HAVE_IRQ | 84 DRIVER_RENDER | 85 DRIVER_PRIME), 86 .lastclose = vc4_lastclose, 87 .irq_handler = vc4_irq, 88 .irq_preinstall = vc4_irq_preinstall, 89 .irq_postinstall = vc4_irq_postinstall, 90 .irq_uninstall = vc4_irq_uninstall, 91 92 .enable_vblank = vc4_enable_vblank, 93 .disable_vblank = vc4_disable_vblank, 94 .get_vblank_counter = drm_vblank_no_hw_counter, 95 96 #if defined(CONFIG_DEBUG_FS) 97 .debugfs_init = vc4_debugfs_init, 98 .debugfs_cleanup = vc4_debugfs_cleanup, 99 #endif 100 101 .gem_create_object = vc4_create_object, 102 .gem_free_object = vc4_free_object, 103 .gem_vm_ops = &drm_gem_cma_vm_ops, 104 105 .prime_handle_to_fd = drm_gem_prime_handle_to_fd, 106 .prime_fd_to_handle = drm_gem_prime_fd_to_handle, 107 .gem_prime_import = drm_gem_prime_import, 108 .gem_prime_export = vc4_prime_export, 109 .gem_prime_get_sg_table = drm_gem_cma_prime_get_sg_table, 110 .gem_prime_import_sg_table = drm_gem_cma_prime_import_sg_table, 111 .gem_prime_vmap = vc4_prime_vmap, 112 .gem_prime_vunmap = drm_gem_cma_prime_vunmap, 113 .gem_prime_mmap = vc4_prime_mmap, 114 115 .dumb_create = vc4_dumb_create, 116 .dumb_map_offset = drm_gem_cma_dumb_map_offset, 117 .dumb_destroy = drm_gem_dumb_destroy, 118 119 .ioctls = vc4_drm_ioctls, 120 .num_ioctls = ARRAY_SIZE(vc4_drm_ioctls), 121 .fops = &vc4_drm_fops, 122 123 .name = DRIVER_NAME, 124 .desc = DRIVER_DESC, 125 .date = DRIVER_DATE, 126 .major = DRIVER_MAJOR, 127 .minor = DRIVER_MINOR, 128 .patchlevel = DRIVER_PATCHLEVEL, 129 }; 130 131 static int compare_dev(struct device *dev, void *data) 132 { 133 return dev == data; 134 } 135 136 static void vc4_match_add_drivers(struct device *dev, 137 struct component_match **match, 138 struct platform_driver *const *drivers, 139 int count) 140 { 141 int i; 142 143 for (i = 0; i < count; i++) { 144 struct device_driver *drv = &drivers[i]->driver; 145 struct device *p = NULL, *d; 146 147 while ((d = bus_find_device(&platform_bus_type, p, drv, 148 (void *)platform_bus_type.match))) { 149 put_device(p); 150 component_match_add(dev, match, compare_dev, d); 151 p = d; 152 } 153 put_device(p); 154 } 155 } 156 157 static void vc4_kick_out_firmware_fb(void) 158 { 159 struct apertures_struct *ap; 160 161 ap = alloc_apertures(1); 162 if (!ap) 163 return; 164 165 /* Since VC4 is a UMA device, the simplefb node may have been 166 * located anywhere in memory. 167 */ 168 ap->ranges[0].base = 0; 169 ap->ranges[0].size = ~0; 170 171 remove_conflicting_framebuffers(ap, "vc4drmfb", false); 172 kfree(ap); 173 } 174 175 static int vc4_drm_bind(struct device *dev) 176 { 177 struct platform_device *pdev = to_platform_device(dev); 178 struct drm_device *drm; 179 struct drm_connector *connector; 180 struct vc4_dev *vc4; 181 int ret = 0; 182 183 dev->coherent_dma_mask = DMA_BIT_MASK(32); 184 185 vc4 = devm_kzalloc(dev, sizeof(*vc4), GFP_KERNEL); 186 if (!vc4) 187 return -ENOMEM; 188 189 drm = drm_dev_alloc(&vc4_drm_driver, dev); 190 if (!drm) 191 return -ENOMEM; 192 platform_set_drvdata(pdev, drm); 193 vc4->dev = drm; 194 drm->dev_private = vc4; 195 196 vc4_bo_cache_init(drm); 197 198 drm_mode_config_init(drm); 199 if (ret) 200 goto unref; 201 202 vc4_gem_init(drm); 203 204 ret = component_bind_all(dev, drm); 205 if (ret) 206 goto gem_destroy; 207 208 vc4_kick_out_firmware_fb(); 209 210 ret = drm_dev_register(drm, 0); 211 if (ret < 0) 212 goto unbind_all; 213 214 /* Connector registration has to occur after DRM device 215 * registration, because it creates sysfs entries based on the 216 * DRM device. 217 */ 218 list_for_each_entry(connector, &drm->mode_config.connector_list, head) { 219 ret = drm_connector_register(connector); 220 if (ret) 221 goto unregister; 222 } 223 224 vc4_kms_load(drm); 225 226 return 0; 227 228 unregister: 229 drm_dev_unregister(drm); 230 unbind_all: 231 component_unbind_all(dev, drm); 232 gem_destroy: 233 vc4_gem_destroy(drm); 234 unref: 235 drm_dev_unref(drm); 236 vc4_bo_cache_destroy(drm); 237 return ret; 238 } 239 240 static void vc4_drm_unbind(struct device *dev) 241 { 242 struct platform_device *pdev = to_platform_device(dev); 243 struct drm_device *drm = platform_get_drvdata(pdev); 244 struct vc4_dev *vc4 = to_vc4_dev(drm); 245 246 if (vc4->fbdev) 247 drm_fbdev_cma_fini(vc4->fbdev); 248 249 drm_mode_config_cleanup(drm); 250 251 drm_put_dev(drm); 252 } 253 254 static const struct component_master_ops vc4_drm_ops = { 255 .bind = vc4_drm_bind, 256 .unbind = vc4_drm_unbind, 257 }; 258 259 static struct platform_driver *const component_drivers[] = { 260 &vc4_hdmi_driver, 261 &vc4_dpi_driver, 262 &vc4_crtc_driver, 263 &vc4_hvs_driver, 264 &vc4_v3d_driver, 265 }; 266 267 static int vc4_platform_drm_probe(struct platform_device *pdev) 268 { 269 struct component_match *match = NULL; 270 struct device *dev = &pdev->dev; 271 272 vc4_match_add_drivers(dev, &match, 273 component_drivers, ARRAY_SIZE(component_drivers)); 274 275 return component_master_add_with_match(dev, &vc4_drm_ops, match); 276 } 277 278 static int vc4_platform_drm_remove(struct platform_device *pdev) 279 { 280 component_master_del(&pdev->dev, &vc4_drm_ops); 281 282 return 0; 283 } 284 285 static const struct of_device_id vc4_of_match[] = { 286 { .compatible = "brcm,bcm2835-vc4", }, 287 {}, 288 }; 289 MODULE_DEVICE_TABLE(of, vc4_of_match); 290 291 static struct platform_driver vc4_platform_driver = { 292 .probe = vc4_platform_drm_probe, 293 .remove = vc4_platform_drm_remove, 294 .driver = { 295 .name = "vc4-drm", 296 .of_match_table = vc4_of_match, 297 }, 298 }; 299 300 static int __init vc4_drm_register(void) 301 { 302 int i, ret; 303 304 for (i = 0; i < ARRAY_SIZE(component_drivers); i++) { 305 ret = platform_driver_register(component_drivers[i]); 306 if (ret) { 307 while (--i >= 0) 308 platform_driver_unregister(component_drivers[i]); 309 return ret; 310 } 311 } 312 return platform_driver_register(&vc4_platform_driver); 313 } 314 315 static void __exit vc4_drm_unregister(void) 316 { 317 int i; 318 319 for (i = ARRAY_SIZE(component_drivers) - 1; i >= 0; i--) 320 platform_driver_unregister(component_drivers[i]); 321 322 platform_driver_unregister(&vc4_platform_driver); 323 } 324 325 module_init(vc4_drm_register); 326 module_exit(vc4_drm_unregister); 327 328 MODULE_ALIAS("platform:vc4-drm"); 329 MODULE_DESCRIPTION("Broadcom VC4 DRM Driver"); 330 MODULE_AUTHOR("Eric Anholt <eric@anholt.net>"); 331 MODULE_LICENSE("GPL v2"); 332