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 int vc4_drm_bind(struct device *dev) 157 { 158 struct platform_device *pdev = to_platform_device(dev); 159 struct drm_device *drm; 160 struct drm_connector *connector; 161 struct vc4_dev *vc4; 162 int ret = 0; 163 164 dev->coherent_dma_mask = DMA_BIT_MASK(32); 165 166 vc4 = devm_kzalloc(dev, sizeof(*vc4), GFP_KERNEL); 167 if (!vc4) 168 return -ENOMEM; 169 170 drm = drm_dev_alloc(&vc4_drm_driver, dev); 171 if (!drm) 172 return -ENOMEM; 173 platform_set_drvdata(pdev, drm); 174 vc4->dev = drm; 175 drm->dev_private = vc4; 176 177 vc4_bo_cache_init(drm); 178 179 drm_mode_config_init(drm); 180 if (ret) 181 goto unref; 182 183 vc4_gem_init(drm); 184 185 ret = component_bind_all(dev, drm); 186 if (ret) 187 goto gem_destroy; 188 189 ret = drm_dev_register(drm, 0); 190 if (ret < 0) 191 goto unbind_all; 192 193 /* Connector registration has to occur after DRM device 194 * registration, because it creates sysfs entries based on the 195 * DRM device. 196 */ 197 list_for_each_entry(connector, &drm->mode_config.connector_list, head) { 198 ret = drm_connector_register(connector); 199 if (ret) 200 goto unregister; 201 } 202 203 vc4_kms_load(drm); 204 205 return 0; 206 207 unregister: 208 drm_dev_unregister(drm); 209 unbind_all: 210 component_unbind_all(dev, drm); 211 gem_destroy: 212 vc4_gem_destroy(drm); 213 unref: 214 drm_dev_unref(drm); 215 vc4_bo_cache_destroy(drm); 216 return ret; 217 } 218 219 static void vc4_drm_unbind(struct device *dev) 220 { 221 struct platform_device *pdev = to_platform_device(dev); 222 struct drm_device *drm = platform_get_drvdata(pdev); 223 struct vc4_dev *vc4 = to_vc4_dev(drm); 224 225 if (vc4->fbdev) 226 drm_fbdev_cma_fini(vc4->fbdev); 227 228 drm_mode_config_cleanup(drm); 229 230 drm_put_dev(drm); 231 } 232 233 static const struct component_master_ops vc4_drm_ops = { 234 .bind = vc4_drm_bind, 235 .unbind = vc4_drm_unbind, 236 }; 237 238 static struct platform_driver *const component_drivers[] = { 239 &vc4_hdmi_driver, 240 &vc4_crtc_driver, 241 &vc4_hvs_driver, 242 &vc4_v3d_driver, 243 }; 244 245 static int vc4_platform_drm_probe(struct platform_device *pdev) 246 { 247 struct component_match *match = NULL; 248 struct device *dev = &pdev->dev; 249 250 vc4_match_add_drivers(dev, &match, 251 component_drivers, ARRAY_SIZE(component_drivers)); 252 253 return component_master_add_with_match(dev, &vc4_drm_ops, match); 254 } 255 256 static int vc4_platform_drm_remove(struct platform_device *pdev) 257 { 258 component_master_del(&pdev->dev, &vc4_drm_ops); 259 260 return 0; 261 } 262 263 static const struct of_device_id vc4_of_match[] = { 264 { .compatible = "brcm,bcm2835-vc4", }, 265 {}, 266 }; 267 MODULE_DEVICE_TABLE(of, vc4_of_match); 268 269 static struct platform_driver vc4_platform_driver = { 270 .probe = vc4_platform_drm_probe, 271 .remove = vc4_platform_drm_remove, 272 .driver = { 273 .name = "vc4-drm", 274 .of_match_table = vc4_of_match, 275 }, 276 }; 277 278 static int __init vc4_drm_register(void) 279 { 280 int i, ret; 281 282 for (i = 0; i < ARRAY_SIZE(component_drivers); i++) { 283 ret = platform_driver_register(component_drivers[i]); 284 if (ret) { 285 while (--i >= 0) 286 platform_driver_unregister(component_drivers[i]); 287 return ret; 288 } 289 } 290 return platform_driver_register(&vc4_platform_driver); 291 } 292 293 static void __exit vc4_drm_unregister(void) 294 { 295 int i; 296 297 for (i = ARRAY_SIZE(component_drivers) - 1; i >= 0; i--) 298 platform_driver_unregister(component_drivers[i]); 299 300 platform_driver_unregister(&vc4_platform_driver); 301 } 302 303 module_init(vc4_drm_register); 304 module_exit(vc4_drm_unregister); 305 306 MODULE_ALIAS("platform:vc4-drm"); 307 MODULE_DESCRIPTION("Broadcom VC4 DRM Driver"); 308 MODULE_AUTHOR("Eric Anholt <eric@anholt.net>"); 309 MODULE_LICENSE("GPL v2"); 310