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8#include <linux/clk.h>
9#include <linux/interrupt.h>
10#include <linux/io.h>
11#include <linux/iopoll.h>
12#include <linux/module.h>
13#include <linux/of.h>
14#include <linux/of_device.h>
15#include <linux/pm_runtime.h>
16#include <linux/reset.h>
17
18#include <media/v4l2-device.h>
19#include <media/v4l2-event.h>
20#include <media/v4l2-ioctl.h>
21#include <media/v4l2-mem2mem.h>
22
23#include "sun8i-formats.h"
24#include "sun8i-rotate.h"
25
26static inline u32 rotate_read(struct rotate_dev *dev, u32 reg)
27{
28 return readl(dev->base + reg);
29}
30
31static inline void rotate_write(struct rotate_dev *dev, u32 reg, u32 value)
32{
33 writel(value, dev->base + reg);
34}
35
36static inline void rotate_set_bits(struct rotate_dev *dev, u32 reg, u32 bits)
37{
38 writel(readl(dev->base + reg) | bits, dev->base + reg);
39}
40
41static void rotate_calc_addr_pitch(dma_addr_t buffer,
42 u32 bytesperline, u32 height,
43 const struct rotate_format *fmt,
44 dma_addr_t *addr, u32 *pitch)
45{
46 u32 size;
47 int i;
48
49 for (i = 0; i < fmt->planes; i++) {
50 pitch[i] = bytesperline;
51 addr[i] = buffer;
52 if (i > 0)
53 pitch[i] /= fmt->hsub / fmt->bpp[i];
54 size = pitch[i] * height;
55 if (i > 0)
56 size /= fmt->vsub;
57 buffer += size;
58 }
59}
60
61static void rotate_device_run(void *priv)
62{
63 struct rotate_ctx *ctx = priv;
64 struct rotate_dev *dev = ctx->dev;
65 struct vb2_v4l2_buffer *src, *dst;
66 const struct rotate_format *fmt;
67 dma_addr_t addr[3];
68 u32 val, pitch[3];
69
70 src = v4l2_m2m_next_src_buf(ctx->fh.m2m_ctx);
71 dst = v4l2_m2m_next_dst_buf(ctx->fh.m2m_ctx);
72
73 v4l2_m2m_buf_copy_metadata(src, dst, true);
74
75 val = ROTATE_GLB_CTL_MODE(ROTATE_MODE_COPY_ROTATE);
76 if (ctx->hflip)
77 val |= ROTATE_GLB_CTL_HFLIP;
78 if (ctx->vflip)
79 val |= ROTATE_GLB_CTL_VFLIP;
80 val |= ROTATE_GLB_CTL_ROTATION(ctx->rotate / 90);
81 if (ctx->rotate != 90 && ctx->rotate != 270)
82 val |= ROTATE_GLB_CTL_BURST_LEN(ROTATE_BURST_64);
83 else
84 val |= ROTATE_GLB_CTL_BURST_LEN(ROTATE_BURST_8);
85 rotate_write(dev, ROTATE_GLB_CTL, val);
86
87 fmt = rotate_find_format(ctx->src_fmt.pixelformat);
88 if (!fmt)
89 return;
90
91 rotate_write(dev, ROTATE_IN_FMT, ROTATE_IN_FMT_FORMAT(fmt->hw_format));
92
93 rotate_calc_addr_pitch(vb2_dma_contig_plane_dma_addr(&src->vb2_buf, 0),
94 ctx->src_fmt.bytesperline, ctx->src_fmt.height,
95 fmt, addr, pitch);
96
97 rotate_write(dev, ROTATE_IN_SIZE,
98 ROTATE_SIZE(ctx->src_fmt.width, ctx->src_fmt.height));
99
100 rotate_write(dev, ROTATE_IN_PITCH0, pitch[0]);
101 rotate_write(dev, ROTATE_IN_PITCH1, pitch[1]);
102 rotate_write(dev, ROTATE_IN_PITCH2, pitch[2]);
103
104 rotate_write(dev, ROTATE_IN_ADDRL0, addr[0]);
105 rotate_write(dev, ROTATE_IN_ADDRL1, addr[1]);
106 rotate_write(dev, ROTATE_IN_ADDRL2, addr[2]);
107
108 rotate_write(dev, ROTATE_IN_ADDRH0, 0);
109 rotate_write(dev, ROTATE_IN_ADDRH1, 0);
110 rotate_write(dev, ROTATE_IN_ADDRH2, 0);
111
112 fmt = rotate_find_format(ctx->dst_fmt.pixelformat);
113 if (!fmt)
114 return;
115
116 rotate_calc_addr_pitch(vb2_dma_contig_plane_dma_addr(&dst->vb2_buf, 0),
117 ctx->dst_fmt.bytesperline, ctx->dst_fmt.height,
118 fmt, addr, pitch);
119
120 rotate_write(dev, ROTATE_OUT_SIZE,
121 ROTATE_SIZE(ctx->dst_fmt.width, ctx->dst_fmt.height));
122
123 rotate_write(dev, ROTATE_OUT_PITCH0, pitch[0]);
124 rotate_write(dev, ROTATE_OUT_PITCH1, pitch[1]);
125 rotate_write(dev, ROTATE_OUT_PITCH2, pitch[2]);
126
127 rotate_write(dev, ROTATE_OUT_ADDRL0, addr[0]);
128 rotate_write(dev, ROTATE_OUT_ADDRL1, addr[1]);
129 rotate_write(dev, ROTATE_OUT_ADDRL2, addr[2]);
130
131 rotate_write(dev, ROTATE_OUT_ADDRH0, 0);
132 rotate_write(dev, ROTATE_OUT_ADDRH1, 0);
133 rotate_write(dev, ROTATE_OUT_ADDRH2, 0);
134
135 rotate_set_bits(dev, ROTATE_INT, ROTATE_INT_FINISH_IRQ_EN);
136 rotate_set_bits(dev, ROTATE_GLB_CTL, ROTATE_GLB_CTL_START);
137}
138
139static irqreturn_t rotate_irq(int irq, void *data)
140{
141 struct vb2_v4l2_buffer *buffer;
142 struct rotate_dev *dev = data;
143 struct rotate_ctx *ctx;
144 unsigned int val;
145
146 ctx = v4l2_m2m_get_curr_priv(dev->m2m_dev);
147 if (!ctx) {
148 v4l2_err(&dev->v4l2_dev,
149 "Instance released before the end of transaction\n");
150 return IRQ_NONE;
151 }
152
153 val = rotate_read(dev, ROTATE_INT);
154 if (!(val & ROTATE_INT_FINISH_IRQ))
155 return IRQ_NONE;
156
157
158 rotate_write(dev, ROTATE_INT, ROTATE_INT_FINISH_IRQ);
159
160 buffer = v4l2_m2m_dst_buf_remove(ctx->fh.m2m_ctx);
161 v4l2_m2m_buf_done(buffer, VB2_BUF_STATE_DONE);
162
163 buffer = v4l2_m2m_src_buf_remove(ctx->fh.m2m_ctx);
164 v4l2_m2m_buf_done(buffer, VB2_BUF_STATE_DONE);
165
166 v4l2_m2m_job_finish(ctx->dev->m2m_dev, ctx->fh.m2m_ctx);
167
168 return IRQ_HANDLED;
169}
170
171static inline struct rotate_ctx *rotate_file2ctx(struct file *file)
172{
173 return container_of(file->private_data, struct rotate_ctx, fh);
174}
175
176static void rotate_prepare_format(struct v4l2_pix_format *pix_fmt)
177{
178 unsigned int height, width, alignment, sizeimage, size, bpl;
179 const struct rotate_format *fmt;
180 int i;
181
182 fmt = rotate_find_format(pix_fmt->pixelformat);
183 if (!fmt)
184 return;
185
186 width = ALIGN(pix_fmt->width, fmt->hsub);
187 height = ALIGN(pix_fmt->height, fmt->vsub);
188
189
190 alignment = 16;
191 if (fmt->planes > 1)
192 alignment *= fmt->hsub / fmt->bpp[1];
193 bpl = ALIGN(width * fmt->bpp[0], alignment);
194
195 sizeimage = 0;
196 for (i = 0; i < fmt->planes; i++) {
197 size = bpl * height;
198 if (i > 0) {
199 size *= fmt->bpp[i];
200 size /= fmt->hsub;
201 size /= fmt->vsub;
202 }
203 sizeimage += size;
204 }
205
206 pix_fmt->width = width;
207 pix_fmt->height = height;
208 pix_fmt->bytesperline = bpl;
209 pix_fmt->sizeimage = sizeimage;
210}
211
212static int rotate_querycap(struct file *file, void *priv,
213 struct v4l2_capability *cap)
214{
215 strscpy(cap->driver, ROTATE_NAME, sizeof(cap->driver));
216 strscpy(cap->card, ROTATE_NAME, sizeof(cap->card));
217 snprintf(cap->bus_info, sizeof(cap->bus_info),
218 "platform:%s", ROTATE_NAME);
219
220 return 0;
221}
222
223static int rotate_enum_fmt_vid_cap(struct file *file, void *priv,
224 struct v4l2_fmtdesc *f)
225{
226 return rotate_enum_fmt(f, true);
227}
228
229static int rotate_enum_fmt_vid_out(struct file *file, void *priv,
230 struct v4l2_fmtdesc *f)
231{
232 return rotate_enum_fmt(f, false);
233}
234
235static int rotate_enum_framesizes(struct file *file, void *priv,
236 struct v4l2_frmsizeenum *fsize)
237{
238 const struct rotate_format *fmt;
239
240 if (fsize->index != 0)
241 return -EINVAL;
242
243 fmt = rotate_find_format(fsize->pixel_format);
244 if (!fmt)
245 return -EINVAL;
246
247 fsize->type = V4L2_FRMSIZE_TYPE_STEPWISE;
248 fsize->stepwise.min_width = ROTATE_MIN_WIDTH;
249 fsize->stepwise.min_height = ROTATE_MIN_HEIGHT;
250 fsize->stepwise.max_width = ROTATE_MAX_WIDTH;
251 fsize->stepwise.max_height = ROTATE_MAX_HEIGHT;
252 fsize->stepwise.step_width = fmt->hsub;
253 fsize->stepwise.step_height = fmt->vsub;
254
255 return 0;
256}
257
258static int rotate_set_cap_format(struct rotate_ctx *ctx,
259 struct v4l2_pix_format *f,
260 u32 rotate)
261{
262 const struct rotate_format *fmt;
263
264 fmt = rotate_find_format(ctx->src_fmt.pixelformat);
265 if (!fmt)
266 return -EINVAL;
267
268 if (fmt->flags & ROTATE_FLAG_YUV)
269 f->pixelformat = V4L2_PIX_FMT_YUV420;
270 else
271 f->pixelformat = ctx->src_fmt.pixelformat;
272
273 f->field = V4L2_FIELD_NONE;
274
275 if (rotate == 90 || rotate == 270) {
276 f->width = ctx->src_fmt.height;
277 f->height = ctx->src_fmt.width;
278 } else {
279 f->width = ctx->src_fmt.width;
280 f->height = ctx->src_fmt.height;
281 }
282
283 rotate_prepare_format(f);
284
285 return 0;
286}
287
288static int rotate_g_fmt_vid_cap(struct file *file, void *priv,
289 struct v4l2_format *f)
290{
291 struct rotate_ctx *ctx = rotate_file2ctx(file);
292
293 f->fmt.pix = ctx->dst_fmt;
294
295 return 0;
296}
297
298static int rotate_g_fmt_vid_out(struct file *file, void *priv,
299 struct v4l2_format *f)
300{
301 struct rotate_ctx *ctx = rotate_file2ctx(file);
302
303 f->fmt.pix = ctx->src_fmt;
304
305 return 0;
306}
307
308static int rotate_try_fmt_vid_cap(struct file *file, void *priv,
309 struct v4l2_format *f)
310{
311 struct rotate_ctx *ctx = rotate_file2ctx(file);
312
313 return rotate_set_cap_format(ctx, &f->fmt.pix, ctx->rotate);
314}
315
316static int rotate_try_fmt_vid_out(struct file *file, void *priv,
317 struct v4l2_format *f)
318{
319 if (!rotate_find_format(f->fmt.pix.pixelformat))
320 f->fmt.pix.pixelformat = V4L2_PIX_FMT_ARGB32;
321
322 if (f->fmt.pix.width < ROTATE_MIN_WIDTH)
323 f->fmt.pix.width = ROTATE_MIN_WIDTH;
324 if (f->fmt.pix.height < ROTATE_MIN_HEIGHT)
325 f->fmt.pix.height = ROTATE_MIN_HEIGHT;
326
327 if (f->fmt.pix.width > ROTATE_MAX_WIDTH)
328 f->fmt.pix.width = ROTATE_MAX_WIDTH;
329 if (f->fmt.pix.height > ROTATE_MAX_HEIGHT)
330 f->fmt.pix.height = ROTATE_MAX_HEIGHT;
331
332 f->fmt.pix.field = V4L2_FIELD_NONE;
333
334 rotate_prepare_format(&f->fmt.pix);
335
336 return 0;
337}
338
339static int rotate_s_fmt_vid_cap(struct file *file, void *priv,
340 struct v4l2_format *f)
341{
342 struct rotate_ctx *ctx = rotate_file2ctx(file);
343 struct vb2_queue *vq;
344 int ret;
345
346 ret = rotate_try_fmt_vid_cap(file, priv, f);
347 if (ret)
348 return ret;
349
350 vq = v4l2_m2m_get_vq(ctx->fh.m2m_ctx, f->type);
351 if (vb2_is_busy(vq))
352 return -EBUSY;
353
354 ctx->dst_fmt = f->fmt.pix;
355
356 return 0;
357}
358
359static int rotate_s_fmt_vid_out(struct file *file, void *priv,
360 struct v4l2_format *f)
361{
362 struct rotate_ctx *ctx = rotate_file2ctx(file);
363 struct vb2_queue *vq;
364 int ret;
365
366 ret = rotate_try_fmt_vid_out(file, priv, f);
367 if (ret)
368 return ret;
369
370 vq = v4l2_m2m_get_vq(ctx->fh.m2m_ctx, f->type);
371 if (vb2_is_busy(vq))
372 return -EBUSY;
373
374
375
376
377
378 vq = v4l2_m2m_get_vq(ctx->fh.m2m_ctx, V4L2_BUF_TYPE_VIDEO_CAPTURE);
379 if (vb2_is_busy(vq))
380 return -EBUSY;
381
382 ctx->src_fmt = f->fmt.pix;
383
384
385 ctx->dst_fmt.colorspace = f->fmt.pix.colorspace;
386 ctx->dst_fmt.xfer_func = f->fmt.pix.xfer_func;
387 ctx->dst_fmt.ycbcr_enc = f->fmt.pix.ycbcr_enc;
388 ctx->dst_fmt.quantization = f->fmt.pix.quantization;
389
390 return rotate_set_cap_format(ctx, &ctx->dst_fmt, ctx->rotate);
391}
392
393static const struct v4l2_ioctl_ops rotate_ioctl_ops = {
394 .vidioc_querycap = rotate_querycap,
395
396 .vidioc_enum_framesizes = rotate_enum_framesizes,
397
398 .vidioc_enum_fmt_vid_cap = rotate_enum_fmt_vid_cap,
399 .vidioc_g_fmt_vid_cap = rotate_g_fmt_vid_cap,
400 .vidioc_try_fmt_vid_cap = rotate_try_fmt_vid_cap,
401 .vidioc_s_fmt_vid_cap = rotate_s_fmt_vid_cap,
402
403 .vidioc_enum_fmt_vid_out = rotate_enum_fmt_vid_out,
404 .vidioc_g_fmt_vid_out = rotate_g_fmt_vid_out,
405 .vidioc_try_fmt_vid_out = rotate_try_fmt_vid_out,
406 .vidioc_s_fmt_vid_out = rotate_s_fmt_vid_out,
407
408 .vidioc_reqbufs = v4l2_m2m_ioctl_reqbufs,
409 .vidioc_querybuf = v4l2_m2m_ioctl_querybuf,
410 .vidioc_qbuf = v4l2_m2m_ioctl_qbuf,
411 .vidioc_dqbuf = v4l2_m2m_ioctl_dqbuf,
412 .vidioc_prepare_buf = v4l2_m2m_ioctl_prepare_buf,
413 .vidioc_create_bufs = v4l2_m2m_ioctl_create_bufs,
414 .vidioc_expbuf = v4l2_m2m_ioctl_expbuf,
415
416 .vidioc_streamon = v4l2_m2m_ioctl_streamon,
417 .vidioc_streamoff = v4l2_m2m_ioctl_streamoff,
418
419 .vidioc_log_status = v4l2_ctrl_log_status,
420 .vidioc_subscribe_event = v4l2_ctrl_subscribe_event,
421 .vidioc_unsubscribe_event = v4l2_event_unsubscribe,
422};
423
424static int rotate_queue_setup(struct vb2_queue *vq, unsigned int *nbuffers,
425 unsigned int *nplanes, unsigned int sizes[],
426 struct device *alloc_devs[])
427{
428 struct rotate_ctx *ctx = vb2_get_drv_priv(vq);
429 struct v4l2_pix_format *pix_fmt;
430
431 if (V4L2_TYPE_IS_OUTPUT(vq->type))
432 pix_fmt = &ctx->src_fmt;
433 else
434 pix_fmt = &ctx->dst_fmt;
435
436 if (*nplanes) {
437 if (sizes[0] < pix_fmt->sizeimage)
438 return -EINVAL;
439 } else {
440 sizes[0] = pix_fmt->sizeimage;
441 *nplanes = 1;
442 }
443
444 return 0;
445}
446
447static int rotate_buf_prepare(struct vb2_buffer *vb)
448{
449 struct vb2_queue *vq = vb->vb2_queue;
450 struct rotate_ctx *ctx = vb2_get_drv_priv(vq);
451 struct v4l2_pix_format *pix_fmt;
452
453 if (V4L2_TYPE_IS_OUTPUT(vq->type))
454 pix_fmt = &ctx->src_fmt;
455 else
456 pix_fmt = &ctx->dst_fmt;
457
458 if (vb2_plane_size(vb, 0) < pix_fmt->sizeimage)
459 return -EINVAL;
460
461 vb2_set_plane_payload(vb, 0, pix_fmt->sizeimage);
462
463 return 0;
464}
465
466static void rotate_buf_queue(struct vb2_buffer *vb)
467{
468 struct vb2_v4l2_buffer *vbuf = to_vb2_v4l2_buffer(vb);
469 struct rotate_ctx *ctx = vb2_get_drv_priv(vb->vb2_queue);
470
471 v4l2_m2m_buf_queue(ctx->fh.m2m_ctx, vbuf);
472}
473
474static void rotate_queue_cleanup(struct vb2_queue *vq, u32 state)
475{
476 struct rotate_ctx *ctx = vb2_get_drv_priv(vq);
477 struct vb2_v4l2_buffer *vbuf;
478
479 do {
480 if (V4L2_TYPE_IS_OUTPUT(vq->type))
481 vbuf = v4l2_m2m_src_buf_remove(ctx->fh.m2m_ctx);
482 else
483 vbuf = v4l2_m2m_dst_buf_remove(ctx->fh.m2m_ctx);
484
485 if (vbuf)
486 v4l2_m2m_buf_done(vbuf, state);
487 } while (vbuf);
488}
489
490static int rotate_start_streaming(struct vb2_queue *vq, unsigned int count)
491{
492 if (V4L2_TYPE_IS_OUTPUT(vq->type)) {
493 struct rotate_ctx *ctx = vb2_get_drv_priv(vq);
494 struct device *dev = ctx->dev->dev;
495 int ret;
496
497 ret = pm_runtime_resume_and_get(dev);
498 if (ret < 0) {
499 dev_err(dev, "Failed to enable module\n");
500
501 return ret;
502 }
503 }
504
505 return 0;
506}
507
508static void rotate_stop_streaming(struct vb2_queue *vq)
509{
510 if (V4L2_TYPE_IS_OUTPUT(vq->type)) {
511 struct rotate_ctx *ctx = vb2_get_drv_priv(vq);
512
513 pm_runtime_put(ctx->dev->dev);
514 }
515
516 rotate_queue_cleanup(vq, VB2_BUF_STATE_ERROR);
517}
518
519static const struct vb2_ops rotate_qops = {
520 .queue_setup = rotate_queue_setup,
521 .buf_prepare = rotate_buf_prepare,
522 .buf_queue = rotate_buf_queue,
523 .start_streaming = rotate_start_streaming,
524 .stop_streaming = rotate_stop_streaming,
525 .wait_prepare = vb2_ops_wait_prepare,
526 .wait_finish = vb2_ops_wait_finish,
527};
528
529static int rotate_queue_init(void *priv, struct vb2_queue *src_vq,
530 struct vb2_queue *dst_vq)
531{
532 struct rotate_ctx *ctx = priv;
533 int ret;
534
535 src_vq->type = V4L2_BUF_TYPE_VIDEO_OUTPUT;
536 src_vq->io_modes = VB2_MMAP | VB2_DMABUF;
537 src_vq->drv_priv = ctx;
538 src_vq->buf_struct_size = sizeof(struct v4l2_m2m_buffer);
539 src_vq->min_buffers_needed = 1;
540 src_vq->ops = &rotate_qops;
541 src_vq->mem_ops = &vb2_dma_contig_memops;
542 src_vq->timestamp_flags = V4L2_BUF_FLAG_TIMESTAMP_COPY;
543 src_vq->lock = &ctx->dev->dev_mutex;
544 src_vq->dev = ctx->dev->dev;
545
546 ret = vb2_queue_init(src_vq);
547 if (ret)
548 return ret;
549
550 dst_vq->type = V4L2_BUF_TYPE_VIDEO_CAPTURE;
551 dst_vq->io_modes = VB2_MMAP | VB2_DMABUF;
552 dst_vq->drv_priv = ctx;
553 dst_vq->buf_struct_size = sizeof(struct v4l2_m2m_buffer);
554 dst_vq->min_buffers_needed = 2;
555 dst_vq->ops = &rotate_qops;
556 dst_vq->mem_ops = &vb2_dma_contig_memops;
557 dst_vq->timestamp_flags = V4L2_BUF_FLAG_TIMESTAMP_COPY;
558 dst_vq->lock = &ctx->dev->dev_mutex;
559 dst_vq->dev = ctx->dev->dev;
560
561 ret = vb2_queue_init(dst_vq);
562 if (ret)
563 return ret;
564
565 return 0;
566}
567
568static int rotate_s_ctrl(struct v4l2_ctrl *ctrl)
569{
570 struct rotate_ctx *ctx = container_of(ctrl->handler,
571 struct rotate_ctx,
572 ctrl_handler);
573 struct v4l2_pix_format fmt;
574
575 switch (ctrl->id) {
576 case V4L2_CID_HFLIP:
577 ctx->hflip = ctrl->val;
578 break;
579 case V4L2_CID_VFLIP:
580 ctx->vflip = ctrl->val;
581 break;
582 case V4L2_CID_ROTATE:
583 rotate_set_cap_format(ctx, &fmt, ctrl->val);
584
585
586 if (fmt.width != ctx->dst_fmt.width ||
587 fmt.height != ctx->dst_fmt.height ||
588 fmt.bytesperline != ctx->dst_fmt.bytesperline ||
589 fmt.sizeimage != ctx->dst_fmt.sizeimage) {
590 struct vb2_queue *vq;
591
592 vq = v4l2_m2m_get_vq(ctx->fh.m2m_ctx,
593 V4L2_BUF_TYPE_VIDEO_CAPTURE);
594 if (vb2_is_busy(vq))
595 return -EBUSY;
596
597 rotate_set_cap_format(ctx, &ctx->dst_fmt, ctrl->val);
598 }
599
600 ctx->rotate = ctrl->val;
601 break;
602 default:
603 return -EINVAL;
604 }
605
606 return 0;
607}
608
609static const struct v4l2_ctrl_ops rotate_ctrl_ops = {
610 .s_ctrl = rotate_s_ctrl,
611};
612
613static int rotate_setup_ctrls(struct rotate_ctx *ctx)
614{
615 v4l2_ctrl_handler_init(&ctx->ctrl_handler, 3);
616
617 v4l2_ctrl_new_std(&ctx->ctrl_handler, &rotate_ctrl_ops,
618 V4L2_CID_HFLIP, 0, 1, 1, 0);
619
620 v4l2_ctrl_new_std(&ctx->ctrl_handler, &rotate_ctrl_ops,
621 V4L2_CID_VFLIP, 0, 1, 1, 0);
622
623 v4l2_ctrl_new_std(&ctx->ctrl_handler, &rotate_ctrl_ops,
624 V4L2_CID_ROTATE, 0, 270, 90, 0);
625
626 if (ctx->ctrl_handler.error) {
627 int err = ctx->ctrl_handler.error;
628
629 v4l2_err(&ctx->dev->v4l2_dev, "control setup failed!\n");
630 v4l2_ctrl_handler_free(&ctx->ctrl_handler);
631
632 return err;
633 }
634
635 return v4l2_ctrl_handler_setup(&ctx->ctrl_handler);
636}
637
638static int rotate_open(struct file *file)
639{
640 struct rotate_dev *dev = video_drvdata(file);
641 struct rotate_ctx *ctx = NULL;
642 int ret;
643
644 if (mutex_lock_interruptible(&dev->dev_mutex))
645 return -ERESTARTSYS;
646
647 ctx = kzalloc(sizeof(*ctx), GFP_KERNEL);
648 if (!ctx) {
649 mutex_unlock(&dev->dev_mutex);
650 return -ENOMEM;
651 }
652
653
654 ctx->src_fmt.pixelformat = V4L2_PIX_FMT_ARGB32;
655 ctx->src_fmt.field = V4L2_FIELD_NONE;
656 ctx->src_fmt.width = 640;
657 ctx->src_fmt.height = 480;
658 rotate_prepare_format(&ctx->src_fmt);
659
660
661 rotate_set_cap_format(ctx, &ctx->dst_fmt, ctx->rotate);
662
663 v4l2_fh_init(&ctx->fh, video_devdata(file));
664 file->private_data = &ctx->fh;
665 ctx->dev = dev;
666
667 ctx->fh.m2m_ctx = v4l2_m2m_ctx_init(dev->m2m_dev, ctx,
668 &rotate_queue_init);
669 if (IS_ERR(ctx->fh.m2m_ctx)) {
670 ret = PTR_ERR(ctx->fh.m2m_ctx);
671 goto err_free;
672 }
673
674 v4l2_fh_add(&ctx->fh);
675
676 ret = rotate_setup_ctrls(ctx);
677 if (ret)
678 goto err_free;
679
680 ctx->fh.ctrl_handler = &ctx->ctrl_handler;
681
682 mutex_unlock(&dev->dev_mutex);
683
684 return 0;
685
686err_free:
687 kfree(ctx);
688 mutex_unlock(&dev->dev_mutex);
689
690 return ret;
691}
692
693static int rotate_release(struct file *file)
694{
695 struct rotate_dev *dev = video_drvdata(file);
696 struct rotate_ctx *ctx = container_of(file->private_data,
697 struct rotate_ctx, fh);
698
699 mutex_lock(&dev->dev_mutex);
700
701 v4l2_ctrl_handler_free(&ctx->ctrl_handler);
702 v4l2_fh_del(&ctx->fh);
703 v4l2_fh_exit(&ctx->fh);
704 v4l2_m2m_ctx_release(ctx->fh.m2m_ctx);
705
706 kfree(ctx);
707
708 mutex_unlock(&dev->dev_mutex);
709
710 return 0;
711}
712
713static const struct v4l2_file_operations rotate_fops = {
714 .owner = THIS_MODULE,
715 .open = rotate_open,
716 .release = rotate_release,
717 .poll = v4l2_m2m_fop_poll,
718 .unlocked_ioctl = video_ioctl2,
719 .mmap = v4l2_m2m_fop_mmap,
720};
721
722static const struct video_device rotate_video_device = {
723 .name = ROTATE_NAME,
724 .vfl_dir = VFL_DIR_M2M,
725 .fops = &rotate_fops,
726 .ioctl_ops = &rotate_ioctl_ops,
727 .minor = -1,
728 .release = video_device_release_empty,
729 .device_caps = V4L2_CAP_VIDEO_M2M | V4L2_CAP_STREAMING,
730};
731
732static const struct v4l2_m2m_ops rotate_m2m_ops = {
733 .device_run = rotate_device_run,
734};
735
736static int rotate_probe(struct platform_device *pdev)
737{
738 struct rotate_dev *dev;
739 struct video_device *vfd;
740 int irq, ret;
741
742 dev = devm_kzalloc(&pdev->dev, sizeof(*dev), GFP_KERNEL);
743 if (!dev)
744 return -ENOMEM;
745
746 dev->vfd = rotate_video_device;
747 dev->dev = &pdev->dev;
748
749 irq = platform_get_irq(pdev, 0);
750 if (irq <= 0)
751 return irq;
752
753 ret = devm_request_irq(dev->dev, irq, rotate_irq,
754 0, dev_name(dev->dev), dev);
755 if (ret) {
756 dev_err(dev->dev, "Failed to request IRQ\n");
757
758 return ret;
759 }
760
761 dev->base = devm_platform_ioremap_resource(pdev, 0);
762 if (IS_ERR(dev->base))
763 return PTR_ERR(dev->base);
764
765 dev->bus_clk = devm_clk_get(dev->dev, "bus");
766 if (IS_ERR(dev->bus_clk)) {
767 dev_err(dev->dev, "Failed to get bus clock\n");
768
769 return PTR_ERR(dev->bus_clk);
770 }
771
772 dev->mod_clk = devm_clk_get(dev->dev, "mod");
773 if (IS_ERR(dev->mod_clk)) {
774 dev_err(dev->dev, "Failed to get mod clock\n");
775
776 return PTR_ERR(dev->mod_clk);
777 }
778
779 dev->rstc = devm_reset_control_get(dev->dev, NULL);
780 if (IS_ERR(dev->rstc)) {
781 dev_err(dev->dev, "Failed to get reset control\n");
782
783 return PTR_ERR(dev->rstc);
784 }
785
786 mutex_init(&dev->dev_mutex);
787
788 ret = v4l2_device_register(&pdev->dev, &dev->v4l2_dev);
789 if (ret) {
790 dev_err(dev->dev, "Failed to register V4L2 device\n");
791
792 return ret;
793 }
794
795 vfd = &dev->vfd;
796 vfd->lock = &dev->dev_mutex;
797 vfd->v4l2_dev = &dev->v4l2_dev;
798
799 snprintf(vfd->name, sizeof(vfd->name), "%s",
800 rotate_video_device.name);
801 video_set_drvdata(vfd, dev);
802
803 ret = video_register_device(vfd, VFL_TYPE_VIDEO, 0);
804 if (ret) {
805 v4l2_err(&dev->v4l2_dev, "Failed to register video device\n");
806
807 goto err_v4l2;
808 }
809
810 v4l2_info(&dev->v4l2_dev,
811 "Device registered as /dev/video%d\n", vfd->num);
812
813 dev->m2m_dev = v4l2_m2m_init(&rotate_m2m_ops);
814 if (IS_ERR(dev->m2m_dev)) {
815 v4l2_err(&dev->v4l2_dev,
816 "Failed to initialize V4L2 M2M device\n");
817 ret = PTR_ERR(dev->m2m_dev);
818
819 goto err_video;
820 }
821
822 platform_set_drvdata(pdev, dev);
823
824 pm_runtime_enable(dev->dev);
825
826 return 0;
827
828err_video:
829 video_unregister_device(&dev->vfd);
830err_v4l2:
831 v4l2_device_unregister(&dev->v4l2_dev);
832
833 return ret;
834}
835
836static int rotate_remove(struct platform_device *pdev)
837{
838 struct rotate_dev *dev = platform_get_drvdata(pdev);
839
840 v4l2_m2m_release(dev->m2m_dev);
841 video_unregister_device(&dev->vfd);
842 v4l2_device_unregister(&dev->v4l2_dev);
843
844 pm_runtime_force_suspend(&pdev->dev);
845
846 return 0;
847}
848
849static int rotate_runtime_resume(struct device *device)
850{
851 struct rotate_dev *dev = dev_get_drvdata(device);
852 int ret;
853
854 ret = clk_prepare_enable(dev->bus_clk);
855 if (ret) {
856 dev_err(dev->dev, "Failed to enable bus clock\n");
857
858 return ret;
859 }
860
861 ret = clk_prepare_enable(dev->mod_clk);
862 if (ret) {
863 dev_err(dev->dev, "Failed to enable mod clock\n");
864
865 goto err_bus_clk;
866 }
867
868 ret = reset_control_deassert(dev->rstc);
869 if (ret) {
870 dev_err(dev->dev, "Failed to apply reset\n");
871
872 goto err_mod_clk;
873 }
874
875 return 0;
876
877err_mod_clk:
878 clk_disable_unprepare(dev->mod_clk);
879err_bus_clk:
880 clk_disable_unprepare(dev->bus_clk);
881
882 return ret;
883}
884
885static int rotate_runtime_suspend(struct device *device)
886{
887 struct rotate_dev *dev = dev_get_drvdata(device);
888
889 reset_control_assert(dev->rstc);
890
891 clk_disable_unprepare(dev->mod_clk);
892 clk_disable_unprepare(dev->bus_clk);
893
894 return 0;
895}
896
897static const struct of_device_id rotate_dt_match[] = {
898 { .compatible = "allwinner,sun8i-a83t-de2-rotate" },
899 { }
900};
901MODULE_DEVICE_TABLE(of, rotate_dt_match);
902
903static const struct dev_pm_ops rotate_pm_ops = {
904 .runtime_resume = rotate_runtime_resume,
905 .runtime_suspend = rotate_runtime_suspend,
906};
907
908static struct platform_driver rotate_driver = {
909 .probe = rotate_probe,
910 .remove = rotate_remove,
911 .driver = {
912 .name = ROTATE_NAME,
913 .of_match_table = rotate_dt_match,
914 .pm = &rotate_pm_ops,
915 },
916};
917module_platform_driver(rotate_driver);
918
919MODULE_LICENSE("GPL v2");
920MODULE_AUTHOR("Jernej Skrabec <jernej.skrabec@siol.net>");
921MODULE_DESCRIPTION("Allwinner DE2 rotate driver");
922
