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