1 // SPDX-License-Identifier: GPL-2.0-only
2 /*
3  * Copyright (C) 2012 Samsung Electronics Co.Ltd
4  * Authors:
5  *	YoungJun Cho <yj44.cho@samsung.com>
6  *	Eunchul Kim <chulspro.kim@samsung.com>
7  */
8 
9 #include <linux/clk.h>
10 #include <linux/component.h>
11 #include <linux/err.h>
12 #include <linux/interrupt.h>
13 #include <linux/io.h>
14 #include <linux/kernel.h>
15 #include <linux/of_device.h>
16 #include <linux/platform_device.h>
17 #include <linux/pm_runtime.h>
18 #include <linux/sizes.h>
19 
20 #include <drm/drm_fourcc.h>
21 #include <drm/exynos_drm.h>
22 
23 #include "exynos_drm_drv.h"
24 #include "exynos_drm_ipp.h"
25 #include "regs-rotator.h"
26 
27 /*
28  * Rotator supports image crop/rotator and input/output DMA operations.
29  * input DMA reads image data from the memory.
30  * output DMA writes image data to memory.
31  */
32 
33 #define ROTATOR_AUTOSUSPEND_DELAY	2000
34 
35 #define rot_read(offset)	readl(rot->regs + (offset))
36 #define rot_write(cfg, offset)	writel(cfg, rot->regs + (offset))
37 
38 enum rot_irq_status {
39 	ROT_IRQ_STATUS_COMPLETE	= 8,
40 	ROT_IRQ_STATUS_ILLEGAL	= 9,
41 };
42 
43 struct rot_variant {
44 	const struct exynos_drm_ipp_formats *formats;
45 	unsigned int	num_formats;
46 };
47 
48 /*
49  * A structure of rotator context.
50  * @ippdrv: prepare initialization using ippdrv.
51  * @regs: memory mapped io registers.
52  * @clock: rotator gate clock.
53  * @limit_tbl: limitation of rotator.
54  * @irq: irq number.
55  */
56 struct rot_context {
57 	struct exynos_drm_ipp ipp;
58 	struct drm_device *drm_dev;
59 	void		*dma_priv;
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 
rotator_reg_set_irq(struct rot_context * rot,bool enable)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 
rotator_reg_get_irq_status(struct rot_context * rot)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 
rotator_irq_handler(int irq,void * arg)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 
rotator_src_set_fmt(struct rot_context * rot,u32 fmt)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 
rotator_src_set_buf(struct rot_context * rot,struct exynos_drm_ipp_buffer * buf)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 
rotator_dst_set_transf(struct rot_context * rot,unsigned int rotation)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 
rotator_dst_set_buf(struct rot_context * rot,struct exynos_drm_ipp_buffer * buf)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 
rotator_start(struct rot_context * rot)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 
rotator_commit(struct exynos_drm_ipp * ipp,struct exynos_drm_ipp_task * task)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 
rotator_bind(struct device * dev,struct device * master,void * data)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 	ipp->drm_dev = drm_dev;
247 	exynos_drm_register_dma(drm_dev, dev, &rot->dma_priv);
248 
249 	exynos_drm_ipp_register(dev, ipp, &ipp_funcs,
250 			   DRM_EXYNOS_IPP_CAP_CROP | DRM_EXYNOS_IPP_CAP_ROTATE,
251 			   rot->formats, rot->num_formats, "rotator");
252 
253 	dev_info(dev, "The exynos rotator has been probed successfully\n");
254 
255 	return 0;
256 }
257 
rotator_unbind(struct device * dev,struct device * master,void * data)258 static void rotator_unbind(struct device *dev, struct device *master,
259 			void *data)
260 {
261 	struct rot_context *rot = dev_get_drvdata(dev);
262 	struct exynos_drm_ipp *ipp = &rot->ipp;
263 
264 	exynos_drm_ipp_unregister(dev, ipp);
265 	exynos_drm_unregister_dma(rot->drm_dev, rot->dev, &rot->dma_priv);
266 }
267 
268 static const struct component_ops rotator_component_ops = {
269 	.bind	= rotator_bind,
270 	.unbind = rotator_unbind,
271 };
272 
rotator_probe(struct platform_device * pdev)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 		return irq;
298 
299 	ret = devm_request_irq(dev, irq, rotator_irq_handler, 0, dev_name(dev),
300 			       rot);
301 	if (ret < 0) {
302 		dev_err(dev, "failed to request irq\n");
303 		return ret;
304 	}
305 
306 	rot->clock = devm_clk_get(dev, "rotator");
307 	if (IS_ERR(rot->clock)) {
308 		dev_err(dev, "failed to get clock\n");
309 		return PTR_ERR(rot->clock);
310 	}
311 
312 	pm_runtime_use_autosuspend(dev);
313 	pm_runtime_set_autosuspend_delay(dev, ROTATOR_AUTOSUSPEND_DELAY);
314 	pm_runtime_enable(dev);
315 	platform_set_drvdata(pdev, rot);
316 
317 	ret = component_add(dev, &rotator_component_ops);
318 	if (ret)
319 		goto err_component;
320 
321 	return 0;
322 
323 err_component:
324 	pm_runtime_dont_use_autosuspend(dev);
325 	pm_runtime_disable(dev);
326 	return ret;
327 }
328 
rotator_remove(struct platform_device * pdev)329 static int rotator_remove(struct platform_device *pdev)
330 {
331 	struct device *dev = &pdev->dev;
332 
333 	component_del(dev, &rotator_component_ops);
334 	pm_runtime_dont_use_autosuspend(dev);
335 	pm_runtime_disable(dev);
336 
337 	return 0;
338 }
339 
340 #ifdef CONFIG_PM
rotator_runtime_suspend(struct device * dev)341 static int rotator_runtime_suspend(struct device *dev)
342 {
343 	struct rot_context *rot = dev_get_drvdata(dev);
344 
345 	clk_disable_unprepare(rot->clock);
346 	return 0;
347 }
348 
rotator_runtime_resume(struct device * dev)349 static int rotator_runtime_resume(struct device *dev)
350 {
351 	struct rot_context *rot = dev_get_drvdata(dev);
352 
353 	return clk_prepare_enable(rot->clock);
354 }
355 #endif
356 
357 static const struct drm_exynos_ipp_limit rotator_s5pv210_rbg888_limits[] = {
358 	{ IPP_SIZE_LIMIT(BUFFER, .h = { 8, SZ_16K }, .v = { 8, SZ_16K }) },
359 	{ IPP_SIZE_LIMIT(AREA, .h.align = 2, .v.align = 2) },
360 };
361 
362 static const struct drm_exynos_ipp_limit rotator_4210_rbg888_limits[] = {
363 	{ IPP_SIZE_LIMIT(BUFFER, .h = { 8, SZ_16K }, .v = { 8, SZ_16K }) },
364 	{ IPP_SIZE_LIMIT(AREA, .h.align = 4, .v.align = 4) },
365 };
366 
367 static const struct drm_exynos_ipp_limit rotator_4412_rbg888_limits[] = {
368 	{ IPP_SIZE_LIMIT(BUFFER, .h = { 8, SZ_8K }, .v = { 8, SZ_8K }) },
369 	{ IPP_SIZE_LIMIT(AREA, .h.align = 4, .v.align = 4) },
370 };
371 
372 static const struct drm_exynos_ipp_limit rotator_5250_rbg888_limits[] = {
373 	{ IPP_SIZE_LIMIT(BUFFER, .h = { 8, SZ_8K }, .v = { 8, SZ_8K }) },
374 	{ IPP_SIZE_LIMIT(AREA, .h.align = 2, .v.align = 2) },
375 };
376 
377 static const struct drm_exynos_ipp_limit rotator_s5pv210_yuv_limits[] = {
378 	{ IPP_SIZE_LIMIT(BUFFER, .h = { 32, SZ_64K }, .v = { 32, SZ_64K }) },
379 	{ IPP_SIZE_LIMIT(AREA, .h.align = 8, .v.align = 8) },
380 };
381 
382 static const struct drm_exynos_ipp_limit rotator_4210_yuv_limits[] = {
383 	{ IPP_SIZE_LIMIT(BUFFER, .h = { 32, SZ_64K }, .v = { 32, SZ_64K }) },
384 	{ IPP_SIZE_LIMIT(AREA, .h.align = 8, .v.align = 8) },
385 };
386 
387 static const struct drm_exynos_ipp_limit rotator_4412_yuv_limits[] = {
388 	{ IPP_SIZE_LIMIT(BUFFER, .h = { 32, SZ_32K }, .v = { 32, SZ_32K }) },
389 	{ IPP_SIZE_LIMIT(AREA, .h.align = 8, .v.align = 8) },
390 };
391 
392 static const struct exynos_drm_ipp_formats rotator_s5pv210_formats[] = {
393 	{ IPP_SRCDST_FORMAT(XRGB8888, rotator_s5pv210_rbg888_limits) },
394 	{ IPP_SRCDST_FORMAT(NV12, rotator_s5pv210_yuv_limits) },
395 };
396 
397 static const struct exynos_drm_ipp_formats rotator_4210_formats[] = {
398 	{ IPP_SRCDST_FORMAT(XRGB8888, rotator_4210_rbg888_limits) },
399 	{ IPP_SRCDST_FORMAT(NV12, rotator_4210_yuv_limits) },
400 };
401 
402 static const struct exynos_drm_ipp_formats rotator_4412_formats[] = {
403 	{ IPP_SRCDST_FORMAT(XRGB8888, rotator_4412_rbg888_limits) },
404 	{ IPP_SRCDST_FORMAT(NV12, rotator_4412_yuv_limits) },
405 };
406 
407 static const struct exynos_drm_ipp_formats rotator_5250_formats[] = {
408 	{ IPP_SRCDST_FORMAT(XRGB8888, rotator_5250_rbg888_limits) },
409 	{ IPP_SRCDST_FORMAT(NV12, rotator_4412_yuv_limits) },
410 };
411 
412 static const struct rot_variant rotator_s5pv210_data = {
413 	.formats = rotator_s5pv210_formats,
414 	.num_formats = ARRAY_SIZE(rotator_s5pv210_formats),
415 };
416 
417 static const struct rot_variant rotator_4210_data = {
418 	.formats = rotator_4210_formats,
419 	.num_formats = ARRAY_SIZE(rotator_4210_formats),
420 };
421 
422 static const struct rot_variant rotator_4412_data = {
423 	.formats = rotator_4412_formats,
424 	.num_formats = ARRAY_SIZE(rotator_4412_formats),
425 };
426 
427 static const struct rot_variant rotator_5250_data = {
428 	.formats = rotator_5250_formats,
429 	.num_formats = ARRAY_SIZE(rotator_5250_formats),
430 };
431 
432 static const struct of_device_id exynos_rotator_match[] = {
433 	{
434 		.compatible = "samsung,s5pv210-rotator",
435 		.data = &rotator_s5pv210_data,
436 	}, {
437 		.compatible = "samsung,exynos4210-rotator",
438 		.data = &rotator_4210_data,
439 	}, {
440 		.compatible = "samsung,exynos4212-rotator",
441 		.data = &rotator_4412_data,
442 	}, {
443 		.compatible = "samsung,exynos5250-rotator",
444 		.data = &rotator_5250_data,
445 	}, {
446 	},
447 };
448 MODULE_DEVICE_TABLE(of, exynos_rotator_match);
449 
450 static const struct dev_pm_ops rotator_pm_ops = {
451 	SET_SYSTEM_SLEEP_PM_OPS(pm_runtime_force_suspend,
452 				pm_runtime_force_resume)
453 	SET_RUNTIME_PM_OPS(rotator_runtime_suspend, rotator_runtime_resume,
454 									NULL)
455 };
456 
457 struct platform_driver rotator_driver = {
458 	.probe		= rotator_probe,
459 	.remove		= rotator_remove,
460 	.driver		= {
461 		.name	= "exynos-rotator",
462 		.owner	= THIS_MODULE,
463 		.pm	= &rotator_pm_ops,
464 		.of_match_table = exynos_rotator_match,
465 	},
466 };
467