1 /* 2 * Copyright (c) 2015, NVIDIA Corporation. 3 * 4 * This program is free software; you can redistribute it and/or modify 5 * it under the terms of the GNU General Public License version 2 as 6 * published by the Free Software Foundation. 7 */ 8 9 #include <linux/clk.h> 10 #include <linux/host1x.h> 11 #include <linux/iommu.h> 12 #include <linux/module.h> 13 #include <linux/of.h> 14 #include <linux/of_device.h> 15 #include <linux/of_platform.h> 16 #include <linux/platform_device.h> 17 #include <linux/pm_runtime.h> 18 #include <linux/reset.h> 19 20 #include <soc/tegra/pmc.h> 21 22 #include "drm.h" 23 #include "falcon.h" 24 #include "vic.h" 25 26 struct vic_config { 27 const char *firmware; 28 }; 29 30 struct vic { 31 struct falcon falcon; 32 bool booted; 33 34 void __iomem *regs; 35 struct tegra_drm_client client; 36 struct host1x_channel *channel; 37 struct iommu_domain *domain; 38 struct device *dev; 39 struct clk *clk; 40 41 /* Platform configuration */ 42 const struct vic_config *config; 43 }; 44 45 static inline struct vic *to_vic(struct tegra_drm_client *client) 46 { 47 return container_of(client, struct vic, client); 48 } 49 50 static void vic_writel(struct vic *vic, u32 value, unsigned int offset) 51 { 52 writel(value, vic->regs + offset); 53 } 54 55 static int vic_runtime_resume(struct device *dev) 56 { 57 struct vic *vic = dev_get_drvdata(dev); 58 59 return clk_prepare_enable(vic->clk); 60 } 61 62 static int vic_runtime_suspend(struct device *dev) 63 { 64 struct vic *vic = dev_get_drvdata(dev); 65 66 clk_disable_unprepare(vic->clk); 67 68 vic->booted = false; 69 70 return 0; 71 } 72 73 static int vic_boot(struct vic *vic) 74 { 75 u32 fce_ucode_size, fce_bin_data_offset; 76 void *hdr; 77 int err = 0; 78 79 if (vic->booted) 80 return 0; 81 82 /* setup clockgating registers */ 83 vic_writel(vic, CG_IDLE_CG_DLY_CNT(4) | 84 CG_IDLE_CG_EN | 85 CG_WAKEUP_DLY_CNT(4), 86 NV_PVIC_MISC_PRI_VIC_CG); 87 88 err = falcon_boot(&vic->falcon); 89 if (err < 0) 90 return err; 91 92 hdr = vic->falcon.firmware.vaddr; 93 fce_bin_data_offset = *(u32 *)(hdr + VIC_UCODE_FCE_DATA_OFFSET); 94 hdr = vic->falcon.firmware.vaddr + 95 *(u32 *)(hdr + VIC_UCODE_FCE_HEADER_OFFSET); 96 fce_ucode_size = *(u32 *)(hdr + FCE_UCODE_SIZE_OFFSET); 97 98 falcon_execute_method(&vic->falcon, VIC_SET_APPLICATION_ID, 1); 99 falcon_execute_method(&vic->falcon, VIC_SET_FCE_UCODE_SIZE, 100 fce_ucode_size); 101 falcon_execute_method(&vic->falcon, VIC_SET_FCE_UCODE_OFFSET, 102 (vic->falcon.firmware.paddr + fce_bin_data_offset) 103 >> 8); 104 105 err = falcon_wait_idle(&vic->falcon); 106 if (err < 0) { 107 dev_err(vic->dev, 108 "failed to set application ID and FCE base\n"); 109 return err; 110 } 111 112 vic->booted = true; 113 114 return 0; 115 } 116 117 static void *vic_falcon_alloc(struct falcon *falcon, size_t size, 118 dma_addr_t *iova) 119 { 120 struct tegra_drm *tegra = falcon->data; 121 122 return tegra_drm_alloc(tegra, size, iova); 123 } 124 125 static void vic_falcon_free(struct falcon *falcon, size_t size, 126 dma_addr_t iova, void *va) 127 { 128 struct tegra_drm *tegra = falcon->data; 129 130 return tegra_drm_free(tegra, size, va, iova); 131 } 132 133 static const struct falcon_ops vic_falcon_ops = { 134 .alloc = vic_falcon_alloc, 135 .free = vic_falcon_free 136 }; 137 138 static int vic_init(struct host1x_client *client) 139 { 140 struct tegra_drm_client *drm = host1x_to_drm_client(client); 141 struct drm_device *dev = dev_get_drvdata(client->parent); 142 struct tegra_drm *tegra = dev->dev_private; 143 struct vic *vic = to_vic(drm); 144 int err; 145 146 if (tegra->domain) { 147 err = iommu_attach_device(tegra->domain, vic->dev); 148 if (err < 0) { 149 dev_err(vic->dev, "failed to attach to domain: %d\n", 150 err); 151 return err; 152 } 153 154 vic->domain = tegra->domain; 155 } 156 157 if (!vic->falcon.data) { 158 vic->falcon.data = tegra; 159 err = falcon_load_firmware(&vic->falcon); 160 if (err < 0) 161 goto detach_device; 162 } 163 164 vic->channel = host1x_channel_request(client->dev); 165 if (!vic->channel) { 166 err = -ENOMEM; 167 goto detach_device; 168 } 169 170 client->syncpts[0] = host1x_syncpt_request(client->dev, 0); 171 if (!client->syncpts[0]) { 172 err = -ENOMEM; 173 goto free_channel; 174 } 175 176 err = tegra_drm_register_client(tegra, drm); 177 if (err < 0) 178 goto free_syncpt; 179 180 return 0; 181 182 free_syncpt: 183 host1x_syncpt_free(client->syncpts[0]); 184 free_channel: 185 host1x_channel_put(vic->channel); 186 detach_device: 187 if (tegra->domain) 188 iommu_detach_device(tegra->domain, vic->dev); 189 190 return err; 191 } 192 193 static int vic_exit(struct host1x_client *client) 194 { 195 struct tegra_drm_client *drm = host1x_to_drm_client(client); 196 struct drm_device *dev = dev_get_drvdata(client->parent); 197 struct tegra_drm *tegra = dev->dev_private; 198 struct vic *vic = to_vic(drm); 199 int err; 200 201 err = tegra_drm_unregister_client(tegra, drm); 202 if (err < 0) 203 return err; 204 205 host1x_syncpt_free(client->syncpts[0]); 206 host1x_channel_put(vic->channel); 207 208 if (vic->domain) { 209 iommu_detach_device(vic->domain, vic->dev); 210 vic->domain = NULL; 211 } 212 213 return 0; 214 } 215 216 static const struct host1x_client_ops vic_client_ops = { 217 .init = vic_init, 218 .exit = vic_exit, 219 }; 220 221 static int vic_open_channel(struct tegra_drm_client *client, 222 struct tegra_drm_context *context) 223 { 224 struct vic *vic = to_vic(client); 225 int err; 226 227 err = pm_runtime_get_sync(vic->dev); 228 if (err < 0) 229 return err; 230 231 err = vic_boot(vic); 232 if (err < 0) { 233 pm_runtime_put(vic->dev); 234 return err; 235 } 236 237 context->channel = host1x_channel_get(vic->channel); 238 if (!context->channel) { 239 pm_runtime_put(vic->dev); 240 return -ENOMEM; 241 } 242 243 return 0; 244 } 245 246 static void vic_close_channel(struct tegra_drm_context *context) 247 { 248 struct vic *vic = to_vic(context->client); 249 250 host1x_channel_put(context->channel); 251 252 pm_runtime_put(vic->dev); 253 } 254 255 static const struct tegra_drm_client_ops vic_ops = { 256 .open_channel = vic_open_channel, 257 .close_channel = vic_close_channel, 258 .submit = tegra_drm_submit, 259 }; 260 261 static const struct vic_config vic_t124_config = { 262 .firmware = "nvidia/tegra124/vic03_ucode.bin", 263 }; 264 265 static const struct vic_config vic_t210_config = { 266 .firmware = "nvidia/tegra210/vic04_ucode.bin", 267 }; 268 269 static const struct of_device_id vic_match[] = { 270 { .compatible = "nvidia,tegra124-vic", .data = &vic_t124_config }, 271 { .compatible = "nvidia,tegra210-vic", .data = &vic_t210_config }, 272 { }, 273 }; 274 275 static int vic_probe(struct platform_device *pdev) 276 { 277 struct vic_config *vic_config = NULL; 278 struct device *dev = &pdev->dev; 279 struct host1x_syncpt **syncpts; 280 struct resource *regs; 281 const struct of_device_id *match; 282 struct vic *vic; 283 int err; 284 285 match = of_match_device(vic_match, dev); 286 vic_config = (struct vic_config *)match->data; 287 288 vic = devm_kzalloc(dev, sizeof(*vic), GFP_KERNEL); 289 if (!vic) 290 return -ENOMEM; 291 292 syncpts = devm_kzalloc(dev, sizeof(*syncpts), GFP_KERNEL); 293 if (!syncpts) 294 return -ENOMEM; 295 296 regs = platform_get_resource(pdev, IORESOURCE_MEM, 0); 297 if (!regs) { 298 dev_err(&pdev->dev, "failed to get registers\n"); 299 return -ENXIO; 300 } 301 302 vic->regs = devm_ioremap_resource(dev, regs); 303 if (IS_ERR(vic->regs)) 304 return PTR_ERR(vic->regs); 305 306 vic->clk = devm_clk_get(dev, NULL); 307 if (IS_ERR(vic->clk)) { 308 dev_err(&pdev->dev, "failed to get clock\n"); 309 return PTR_ERR(vic->clk); 310 } 311 312 vic->falcon.dev = dev; 313 vic->falcon.regs = vic->regs; 314 vic->falcon.ops = &vic_falcon_ops; 315 316 err = falcon_init(&vic->falcon); 317 if (err < 0) 318 return err; 319 320 err = falcon_read_firmware(&vic->falcon, vic_config->firmware); 321 if (err < 0) 322 goto exit_falcon; 323 324 platform_set_drvdata(pdev, vic); 325 326 INIT_LIST_HEAD(&vic->client.base.list); 327 vic->client.base.ops = &vic_client_ops; 328 vic->client.base.dev = dev; 329 vic->client.base.class = HOST1X_CLASS_VIC; 330 vic->client.base.syncpts = syncpts; 331 vic->client.base.num_syncpts = 1; 332 vic->dev = dev; 333 vic->config = vic_config; 334 335 INIT_LIST_HEAD(&vic->client.list); 336 vic->client.ops = &vic_ops; 337 338 err = host1x_client_register(&vic->client.base); 339 if (err < 0) { 340 dev_err(dev, "failed to register host1x client: %d\n", err); 341 platform_set_drvdata(pdev, NULL); 342 goto exit_falcon; 343 } 344 345 pm_runtime_enable(&pdev->dev); 346 if (!pm_runtime_enabled(&pdev->dev)) { 347 err = vic_runtime_resume(&pdev->dev); 348 if (err < 0) 349 goto unregister_client; 350 } 351 352 return 0; 353 354 unregister_client: 355 host1x_client_unregister(&vic->client.base); 356 exit_falcon: 357 falcon_exit(&vic->falcon); 358 359 return err; 360 } 361 362 static int vic_remove(struct platform_device *pdev) 363 { 364 struct vic *vic = platform_get_drvdata(pdev); 365 int err; 366 367 err = host1x_client_unregister(&vic->client.base); 368 if (err < 0) { 369 dev_err(&pdev->dev, "failed to unregister host1x client: %d\n", 370 err); 371 return err; 372 } 373 374 if (pm_runtime_enabled(&pdev->dev)) 375 pm_runtime_disable(&pdev->dev); 376 else 377 vic_runtime_suspend(&pdev->dev); 378 379 falcon_exit(&vic->falcon); 380 381 return 0; 382 } 383 384 static const struct dev_pm_ops vic_pm_ops = { 385 SET_RUNTIME_PM_OPS(vic_runtime_suspend, vic_runtime_resume, NULL) 386 }; 387 388 struct platform_driver tegra_vic_driver = { 389 .driver = { 390 .name = "tegra-vic", 391 .of_match_table = vic_match, 392 .pm = &vic_pm_ops 393 }, 394 .probe = vic_probe, 395 .remove = vic_remove, 396 }; 397