1 /* 2 * Copyright (C) 2012 Samsung Electronics Co.Ltd 3 * Authors: 4 * YoungJun Cho <yj44.cho@samsung.com> 5 * Eunchul Kim <chulspro.kim@samsung.com> 6 * 7 * This program is free software; you can redistribute it and/or modify 8 * it under the terms of the GNU General Public License version 2 as 9 * published by the Free Software Foundationr 10 */ 11 12 #include <linux/kernel.h> 13 #include <linux/component.h> 14 #include <linux/err.h> 15 #include <linux/interrupt.h> 16 #include <linux/io.h> 17 #include <linux/platform_device.h> 18 #include <linux/clk.h> 19 #include <linux/of_device.h> 20 #include <linux/pm_runtime.h> 21 22 #include <drm/drmP.h> 23 #include <drm/exynos_drm.h> 24 #include "regs-rotator.h" 25 #include "exynos_drm_drv.h" 26 #include "exynos_drm_ipp.h" 27 28 /* 29 * Rotator supports image crop/rotator and input/output DMA operations. 30 * input DMA reads image data from the memory. 31 * output DMA writes image data to memory. 32 */ 33 34 #define ROTATOR_AUTOSUSPEND_DELAY 2000 35 36 #define rot_read(offset) readl(rot->regs + (offset)) 37 #define rot_write(cfg, offset) writel(cfg, rot->regs + (offset)) 38 39 enum rot_irq_status { 40 ROT_IRQ_STATUS_COMPLETE = 8, 41 ROT_IRQ_STATUS_ILLEGAL = 9, 42 }; 43 44 struct rot_variant { 45 const struct exynos_drm_ipp_formats *formats; 46 unsigned int num_formats; 47 }; 48 49 /* 50 * A structure of rotator context. 51 * @ippdrv: prepare initialization using ippdrv. 52 * @regs: memory mapped io registers. 53 * @clock: rotator gate clock. 54 * @limit_tbl: limitation of rotator. 55 * @irq: irq number. 56 */ 57 struct rot_context { 58 struct exynos_drm_ipp ipp; 59 struct drm_device *drm_dev; 60 struct device *dev; 61 void __iomem *regs; 62 struct clk *clock; 63 const struct exynos_drm_ipp_formats *formats; 64 unsigned int num_formats; 65 struct exynos_drm_ipp_task *task; 66 }; 67 68 static void rotator_reg_set_irq(struct rot_context *rot, bool enable) 69 { 70 u32 val = rot_read(ROT_CONFIG); 71 72 if (enable == true) 73 val |= ROT_CONFIG_IRQ; 74 else 75 val &= ~ROT_CONFIG_IRQ; 76 77 rot_write(val, ROT_CONFIG); 78 } 79 80 static enum rot_irq_status rotator_reg_get_irq_status(struct rot_context *rot) 81 { 82 u32 val = rot_read(ROT_STATUS); 83 84 val = ROT_STATUS_IRQ(val); 85 86 if (val == ROT_STATUS_IRQ_VAL_COMPLETE) 87 return ROT_IRQ_STATUS_COMPLETE; 88 89 return ROT_IRQ_STATUS_ILLEGAL; 90 } 91 92 static irqreturn_t rotator_irq_handler(int irq, void *arg) 93 { 94 struct rot_context *rot = arg; 95 enum rot_irq_status irq_status; 96 u32 val; 97 98 /* Get execution result */ 99 irq_status = rotator_reg_get_irq_status(rot); 100 101 /* clear status */ 102 val = rot_read(ROT_STATUS); 103 val |= ROT_STATUS_IRQ_PENDING((u32)irq_status); 104 rot_write(val, ROT_STATUS); 105 106 if (rot->task) { 107 struct exynos_drm_ipp_task *task = rot->task; 108 109 rot->task = NULL; 110 pm_runtime_mark_last_busy(rot->dev); 111 pm_runtime_put_autosuspend(rot->dev); 112 exynos_drm_ipp_task_done(task, 113 irq_status == ROT_IRQ_STATUS_COMPLETE ? 0 : -EINVAL); 114 } 115 116 return IRQ_HANDLED; 117 } 118 119 static void rotator_src_set_fmt(struct rot_context *rot, u32 fmt) 120 { 121 u32 val; 122 123 val = rot_read(ROT_CONTROL); 124 val &= ~ROT_CONTROL_FMT_MASK; 125 126 switch (fmt) { 127 case DRM_FORMAT_NV12: 128 val |= ROT_CONTROL_FMT_YCBCR420_2P; 129 break; 130 case DRM_FORMAT_XRGB8888: 131 val |= ROT_CONTROL_FMT_RGB888; 132 break; 133 } 134 135 rot_write(val, ROT_CONTROL); 136 } 137 138 static void rotator_src_set_buf(struct rot_context *rot, 139 struct exynos_drm_ipp_buffer *buf) 140 { 141 u32 val; 142 143 /* Set buffer size configuration */ 144 val = ROT_SET_BUF_SIZE_H(buf->buf.height) | 145 ROT_SET_BUF_SIZE_W(buf->buf.pitch[0] / buf->format->cpp[0]); 146 rot_write(val, ROT_SRC_BUF_SIZE); 147 148 /* Set crop image position configuration */ 149 val = ROT_CROP_POS_Y(buf->rect.y) | ROT_CROP_POS_X(buf->rect.x); 150 rot_write(val, ROT_SRC_CROP_POS); 151 val = ROT_SRC_CROP_SIZE_H(buf->rect.h) | 152 ROT_SRC_CROP_SIZE_W(buf->rect.w); 153 rot_write(val, ROT_SRC_CROP_SIZE); 154 155 /* Set buffer DMA address */ 156 rot_write(buf->dma_addr[0], ROT_SRC_BUF_ADDR(0)); 157 rot_write(buf->dma_addr[1], ROT_SRC_BUF_ADDR(1)); 158 } 159 160 static void rotator_dst_set_transf(struct rot_context *rot, 161 unsigned int rotation) 162 { 163 u32 val; 164 165 /* Set transform configuration */ 166 val = rot_read(ROT_CONTROL); 167 val &= ~ROT_CONTROL_FLIP_MASK; 168 169 if (rotation & DRM_MODE_REFLECT_X) 170 val |= ROT_CONTROL_FLIP_VERTICAL; 171 if (rotation & DRM_MODE_REFLECT_Y) 172 val |= ROT_CONTROL_FLIP_HORIZONTAL; 173 174 val &= ~ROT_CONTROL_ROT_MASK; 175 176 if (rotation & DRM_MODE_ROTATE_90) 177 val |= ROT_CONTROL_ROT_90; 178 else if (rotation & DRM_MODE_ROTATE_180) 179 val |= ROT_CONTROL_ROT_180; 180 else if (rotation & DRM_MODE_ROTATE_270) 181 val |= ROT_CONTROL_ROT_270; 182 183 rot_write(val, ROT_CONTROL); 184 } 185 186 static void rotator_dst_set_buf(struct rot_context *rot, 187 struct exynos_drm_ipp_buffer *buf) 188 { 189 u32 val; 190 191 /* Set buffer size configuration */ 192 val = ROT_SET_BUF_SIZE_H(buf->buf.height) | 193 ROT_SET_BUF_SIZE_W(buf->buf.pitch[0] / buf->format->cpp[0]); 194 rot_write(val, ROT_DST_BUF_SIZE); 195 196 /* Set crop image position configuration */ 197 val = ROT_CROP_POS_Y(buf->rect.y) | ROT_CROP_POS_X(buf->rect.x); 198 rot_write(val, ROT_DST_CROP_POS); 199 200 /* Set buffer DMA address */ 201 rot_write(buf->dma_addr[0], ROT_DST_BUF_ADDR(0)); 202 rot_write(buf->dma_addr[1], ROT_DST_BUF_ADDR(1)); 203 } 204 205 static void rotator_start(struct rot_context *rot) 206 { 207 u32 val; 208 209 /* Set interrupt enable */ 210 rotator_reg_set_irq(rot, true); 211 212 val = rot_read(ROT_CONTROL); 213 val |= ROT_CONTROL_START; 214 rot_write(val, ROT_CONTROL); 215 } 216 217 static int rotator_commit(struct exynos_drm_ipp *ipp, 218 struct exynos_drm_ipp_task *task) 219 { 220 struct rot_context *rot = 221 container_of(ipp, struct rot_context, ipp); 222 223 pm_runtime_get_sync(rot->dev); 224 rot->task = task; 225 226 rotator_src_set_fmt(rot, task->src.buf.fourcc); 227 rotator_src_set_buf(rot, &task->src); 228 rotator_dst_set_transf(rot, task->transform.rotation); 229 rotator_dst_set_buf(rot, &task->dst); 230 rotator_start(rot); 231 232 return 0; 233 } 234 235 static const struct exynos_drm_ipp_funcs ipp_funcs = { 236 .commit = rotator_commit, 237 }; 238 239 static int rotator_bind(struct device *dev, struct device *master, void *data) 240 { 241 struct rot_context *rot = dev_get_drvdata(dev); 242 struct drm_device *drm_dev = data; 243 struct exynos_drm_ipp *ipp = &rot->ipp; 244 245 rot->drm_dev = drm_dev; 246 exynos_drm_register_dma(drm_dev, dev); 247 248 exynos_drm_ipp_register(drm_dev, ipp, &ipp_funcs, 249 DRM_EXYNOS_IPP_CAP_CROP | DRM_EXYNOS_IPP_CAP_ROTATE, 250 rot->formats, rot->num_formats, "rotator"); 251 252 dev_info(dev, "The exynos rotator has been probed successfully\n"); 253 254 return 0; 255 } 256 257 static void rotator_unbind(struct device *dev, struct device *master, 258 void *data) 259 { 260 struct rot_context *rot = dev_get_drvdata(dev); 261 struct drm_device *drm_dev = data; 262 struct exynos_drm_ipp *ipp = &rot->ipp; 263 264 exynos_drm_ipp_unregister(drm_dev, ipp); 265 exynos_drm_unregister_dma(rot->drm_dev, rot->dev); 266 } 267 268 static const struct component_ops rotator_component_ops = { 269 .bind = rotator_bind, 270 .unbind = rotator_unbind, 271 }; 272 273 static int rotator_probe(struct platform_device *pdev) 274 { 275 struct device *dev = &pdev->dev; 276 struct resource *regs_res; 277 struct rot_context *rot; 278 const struct rot_variant *variant; 279 int irq; 280 int ret; 281 282 rot = devm_kzalloc(dev, sizeof(*rot), GFP_KERNEL); 283 if (!rot) 284 return -ENOMEM; 285 286 variant = of_device_get_match_data(dev); 287 rot->formats = variant->formats; 288 rot->num_formats = variant->num_formats; 289 rot->dev = dev; 290 regs_res = platform_get_resource(pdev, IORESOURCE_MEM, 0); 291 rot->regs = devm_ioremap_resource(dev, regs_res); 292 if (IS_ERR(rot->regs)) 293 return PTR_ERR(rot->regs); 294 295 irq = platform_get_irq(pdev, 0); 296 if (irq < 0) { 297 dev_err(dev, "failed to get irq\n"); 298 return irq; 299 } 300 301 ret = devm_request_irq(dev, irq, rotator_irq_handler, 0, dev_name(dev), 302 rot); 303 if (ret < 0) { 304 dev_err(dev, "failed to request irq\n"); 305 return ret; 306 } 307 308 rot->clock = devm_clk_get(dev, "rotator"); 309 if (IS_ERR(rot->clock)) { 310 dev_err(dev, "failed to get clock\n"); 311 return PTR_ERR(rot->clock); 312 } 313 314 pm_runtime_use_autosuspend(dev); 315 pm_runtime_set_autosuspend_delay(dev, ROTATOR_AUTOSUSPEND_DELAY); 316 pm_runtime_enable(dev); 317 platform_set_drvdata(pdev, rot); 318 319 ret = component_add(dev, &rotator_component_ops); 320 if (ret) 321 goto err_component; 322 323 return 0; 324 325 err_component: 326 pm_runtime_dont_use_autosuspend(dev); 327 pm_runtime_disable(dev); 328 return ret; 329 } 330 331 static int rotator_remove(struct platform_device *pdev) 332 { 333 struct device *dev = &pdev->dev; 334 335 component_del(dev, &rotator_component_ops); 336 pm_runtime_dont_use_autosuspend(dev); 337 pm_runtime_disable(dev); 338 339 return 0; 340 } 341 342 #ifdef CONFIG_PM 343 static int rotator_runtime_suspend(struct device *dev) 344 { 345 struct rot_context *rot = dev_get_drvdata(dev); 346 347 clk_disable_unprepare(rot->clock); 348 return 0; 349 } 350 351 static int rotator_runtime_resume(struct device *dev) 352 { 353 struct rot_context *rot = dev_get_drvdata(dev); 354 355 return clk_prepare_enable(rot->clock); 356 } 357 #endif 358 359 static const struct drm_exynos_ipp_limit rotator_4210_rbg888_limits[] = { 360 { IPP_SIZE_LIMIT(BUFFER, .h = { 8, SZ_16K }, .v = { 8, SZ_16K }) }, 361 { IPP_SIZE_LIMIT(AREA, .h.align = 4, .v.align = 4) }, 362 }; 363 364 static const struct drm_exynos_ipp_limit rotator_4412_rbg888_limits[] = { 365 { IPP_SIZE_LIMIT(BUFFER, .h = { 8, SZ_8K }, .v = { 8, SZ_8K }) }, 366 { IPP_SIZE_LIMIT(AREA, .h.align = 4, .v.align = 4) }, 367 }; 368 369 static const struct drm_exynos_ipp_limit rotator_5250_rbg888_limits[] = { 370 { IPP_SIZE_LIMIT(BUFFER, .h = { 8, SZ_8K }, .v = { 8, SZ_8K }) }, 371 { IPP_SIZE_LIMIT(AREA, .h.align = 2, .v.align = 2) }, 372 }; 373 374 static const struct drm_exynos_ipp_limit rotator_4210_yuv_limits[] = { 375 { IPP_SIZE_LIMIT(BUFFER, .h = { 32, SZ_64K }, .v = { 32, SZ_64K }) }, 376 { IPP_SIZE_LIMIT(AREA, .h.align = 8, .v.align = 8) }, 377 }; 378 379 static const struct drm_exynos_ipp_limit rotator_4412_yuv_limits[] = { 380 { IPP_SIZE_LIMIT(BUFFER, .h = { 32, SZ_32K }, .v = { 32, SZ_32K }) }, 381 { IPP_SIZE_LIMIT(AREA, .h.align = 8, .v.align = 8) }, 382 }; 383 384 static const struct exynos_drm_ipp_formats rotator_4210_formats[] = { 385 { IPP_SRCDST_FORMAT(XRGB8888, rotator_4210_rbg888_limits) }, 386 { IPP_SRCDST_FORMAT(NV12, rotator_4210_yuv_limits) }, 387 }; 388 389 static const struct exynos_drm_ipp_formats rotator_4412_formats[] = { 390 { IPP_SRCDST_FORMAT(XRGB8888, rotator_4412_rbg888_limits) }, 391 { IPP_SRCDST_FORMAT(NV12, rotator_4412_yuv_limits) }, 392 }; 393 394 static const struct exynos_drm_ipp_formats rotator_5250_formats[] = { 395 { IPP_SRCDST_FORMAT(XRGB8888, rotator_5250_rbg888_limits) }, 396 { IPP_SRCDST_FORMAT(NV12, rotator_4412_yuv_limits) }, 397 }; 398 399 static const struct rot_variant rotator_4210_data = { 400 .formats = rotator_4210_formats, 401 .num_formats = ARRAY_SIZE(rotator_4210_formats), 402 }; 403 404 static const struct rot_variant rotator_4412_data = { 405 .formats = rotator_4412_formats, 406 .num_formats = ARRAY_SIZE(rotator_4412_formats), 407 }; 408 409 static const struct rot_variant rotator_5250_data = { 410 .formats = rotator_5250_formats, 411 .num_formats = ARRAY_SIZE(rotator_5250_formats), 412 }; 413 414 static const struct of_device_id exynos_rotator_match[] = { 415 { 416 .compatible = "samsung,exynos4210-rotator", 417 .data = &rotator_4210_data, 418 }, { 419 .compatible = "samsung,exynos4212-rotator", 420 .data = &rotator_4412_data, 421 }, { 422 .compatible = "samsung,exynos5250-rotator", 423 .data = &rotator_5250_data, 424 }, { 425 }, 426 }; 427 MODULE_DEVICE_TABLE(of, exynos_rotator_match); 428 429 static const struct dev_pm_ops rotator_pm_ops = { 430 SET_SYSTEM_SLEEP_PM_OPS(pm_runtime_force_suspend, 431 pm_runtime_force_resume) 432 SET_RUNTIME_PM_OPS(rotator_runtime_suspend, rotator_runtime_resume, 433 NULL) 434 }; 435 436 struct platform_driver rotator_driver = { 437 .probe = rotator_probe, 438 .remove = rotator_remove, 439 .driver = { 440 .name = "exynos-rotator", 441 .owner = THIS_MODULE, 442 .pm = &rotator_pm_ops, 443 .of_match_table = exynos_rotator_match, 444 }, 445 }; 446