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 vc4_bo_cache_init(drm); 188 189 drm_mode_config_init(drm); 190 if (ret) 191 goto unref; 192 193 vc4_gem_init(drm); 194 195 ret = component_bind_all(dev, drm); 196 if (ret) 197 goto gem_destroy; 198 199 ret = drm_dev_register(drm, 0); 200 if (ret < 0) 201 goto unbind_all; 202 203 /* Connector registration has to occur after DRM device 204 * registration, because it creates sysfs entries based on the 205 * DRM device. 206 */ 207 list_for_each_entry(connector, &drm->mode_config.connector_list, head) { 208 ret = drm_connector_register(connector); 209 if (ret) 210 goto unregister; 211 } 212 213 vc4_kms_load(drm); 214 215 return 0; 216 217 unregister: 218 drm_dev_unregister(drm); 219 unbind_all: 220 component_unbind_all(dev, drm); 221 gem_destroy: 222 vc4_gem_destroy(drm); 223 unref: 224 drm_dev_unref(drm); 225 vc4_bo_cache_destroy(drm); 226 return ret; 227 } 228 229 static void vc4_drm_unbind(struct device *dev) 230 { 231 struct platform_device *pdev = to_platform_device(dev); 232 struct drm_device *drm = platform_get_drvdata(pdev); 233 struct vc4_dev *vc4 = to_vc4_dev(drm); 234 235 if (vc4->fbdev) 236 drm_fbdev_cma_fini(vc4->fbdev); 237 238 drm_mode_config_cleanup(drm); 239 240 drm_put_dev(drm); 241 } 242 243 static const struct component_master_ops vc4_drm_ops = { 244 .bind = vc4_drm_bind, 245 .unbind = vc4_drm_unbind, 246 }; 247 248 static struct platform_driver *const component_drivers[] = { 249 &vc4_hdmi_driver, 250 &vc4_crtc_driver, 251 &vc4_hvs_driver, 252 &vc4_v3d_driver, 253 }; 254 255 static int vc4_platform_drm_probe(struct platform_device *pdev) 256 { 257 struct component_match *match = NULL; 258 struct device *dev = &pdev->dev; 259 260 vc4_match_add_drivers(dev, &match, 261 component_drivers, ARRAY_SIZE(component_drivers)); 262 263 return component_master_add_with_match(dev, &vc4_drm_ops, match); 264 } 265 266 static int vc4_platform_drm_remove(struct platform_device *pdev) 267 { 268 component_master_del(&pdev->dev, &vc4_drm_ops); 269 270 return 0; 271 } 272 273 static const struct of_device_id vc4_of_match[] = { 274 { .compatible = "brcm,bcm2835-vc4", }, 275 {}, 276 }; 277 MODULE_DEVICE_TABLE(of, vc4_of_match); 278 279 static struct platform_driver vc4_platform_driver = { 280 .probe = vc4_platform_drm_probe, 281 .remove = vc4_platform_drm_remove, 282 .driver = { 283 .name = "vc4-drm", 284 .of_match_table = vc4_of_match, 285 }, 286 }; 287 288 static int __init vc4_drm_register(void) 289 { 290 int i, ret; 291 292 for (i = 0; i < ARRAY_SIZE(component_drivers); i++) { 293 ret = platform_driver_register(component_drivers[i]); 294 if (ret) { 295 while (--i >= 0) 296 platform_driver_unregister(component_drivers[i]); 297 return ret; 298 } 299 } 300 return platform_driver_register(&vc4_platform_driver); 301 } 302 303 static void __exit vc4_drm_unregister(void) 304 { 305 int i; 306 307 for (i = ARRAY_SIZE(component_drivers) - 1; i >= 0; i--) 308 platform_driver_unregister(component_drivers[i]); 309 310 platform_driver_unregister(&vc4_platform_driver); 311 } 312 313 module_init(vc4_drm_register); 314 module_exit(vc4_drm_unregister); 315 316 MODULE_ALIAS("platform:vc4-drm"); 317 MODULE_DESCRIPTION("Broadcom VC4 DRM Driver"); 318 MODULE_AUTHOR("Eric Anholt <eric@anholt.net>"); 319 MODULE_LICENSE("GPL v2"); 320