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11#include <linux/clk.h>
12#include <linux/completion.h>
13#include <linux/delay.h>
14#include <linux/fs.h>
15#include <linux/init.h>
16#include <linux/interrupt.h>
17#include <linux/kernel.h>
18#include <linux/module.h>
19#include <linux/of_graph.h>
20#include <linux/platform_device.h>
21#include <linux/pm_runtime.h>
22#include <linux/slab.h>
23#include <linux/of.h>
24
25#include <linux/videodev2.h>
26#include <media/v4l2-ctrls.h>
27#include <media/v4l2-device.h>
28#include <media/v4l2-dev.h>
29#include <media/v4l2-ioctl.h>
30#include <media/v4l2-event.h>
31#include <media/v4l2-fwnode.h>
32#include <media/videobuf2-dma-contig.h>
33#include <media/v4l2-image-sizes.h>
34
35#include "atmel-isi.h"
36
37#define MAX_SUPPORT_WIDTH 2048U
38#define MAX_SUPPORT_HEIGHT 2048U
39#define MIN_FRAME_RATE 15
40#define FRAME_INTERVAL_MILLI_SEC (1000 / MIN_FRAME_RATE)
41
42
43struct fbd {
44
45 u32 fb_address;
46
47 u32 dma_ctrl;
48
49 u32 next_fbd_address;
50};
51
52static void set_dma_ctrl(struct fbd *fb_desc, u32 ctrl)
53{
54 fb_desc->dma_ctrl = ctrl;
55}
56
57struct isi_dma_desc {
58 struct list_head list;
59 struct fbd *p_fbd;
60 dma_addr_t fbd_phys;
61};
62
63
64struct frame_buffer {
65 struct vb2_v4l2_buffer vb;
66 struct isi_dma_desc *p_dma_desc;
67 struct list_head list;
68};
69
70struct isi_graph_entity {
71 struct device_node *node;
72
73 struct v4l2_async_subdev asd;
74 struct v4l2_subdev *subdev;
75};
76
77
78
79
80
81
82
83
84
85
86struct isi_format {
87 u32 fourcc;
88 u32 mbus_code;
89 u8 bpp;
90 u32 swap;
91};
92
93
94struct atmel_isi {
95
96 spinlock_t irqlock;
97 struct device *dev;
98 void __iomem *regs;
99
100 int sequence;
101
102
103 struct fbd *p_fb_descriptors;
104 dma_addr_t fb_descriptors_phys;
105 struct list_head dma_desc_head;
106 struct isi_dma_desc dma_desc[VIDEO_MAX_FRAME];
107 bool enable_preview_path;
108
109 struct completion complete;
110
111 struct clk *pclk;
112 unsigned int irq;
113
114 struct isi_platform_data pdata;
115 u16 width_flags;
116
117 struct list_head video_buffer_list;
118 struct frame_buffer *active;
119
120 struct v4l2_device v4l2_dev;
121 struct video_device *vdev;
122 struct v4l2_async_notifier notifier;
123 struct isi_graph_entity entity;
124 struct v4l2_format fmt;
125
126 const struct isi_format **user_formats;
127 unsigned int num_user_formats;
128 const struct isi_format *current_fmt;
129
130 struct mutex lock;
131 struct vb2_queue queue;
132};
133
134#define notifier_to_isi(n) container_of(n, struct atmel_isi, notifier)
135
136static void isi_writel(struct atmel_isi *isi, u32 reg, u32 val)
137{
138 writel(val, isi->regs + reg);
139}
140static u32 isi_readl(struct atmel_isi *isi, u32 reg)
141{
142 return readl(isi->regs + reg);
143}
144
145static void configure_geometry(struct atmel_isi *isi)
146{
147 u32 cfg2, psize;
148 u32 fourcc = isi->current_fmt->fourcc;
149
150 isi->enable_preview_path = fourcc == V4L2_PIX_FMT_RGB565 ||
151 fourcc == V4L2_PIX_FMT_RGB32;
152
153
154 cfg2 = isi->current_fmt->swap;
155
156 isi_writel(isi, ISI_CTRL, ISI_CTRL_DIS);
157
158 cfg2 |= ((isi->fmt.fmt.pix.width - 1) << ISI_CFG2_IM_HSIZE_OFFSET) &
159 ISI_CFG2_IM_HSIZE_MASK;
160
161 cfg2 |= ((isi->fmt.fmt.pix.height - 1) << ISI_CFG2_IM_VSIZE_OFFSET)
162 & ISI_CFG2_IM_VSIZE_MASK;
163 isi_writel(isi, ISI_CFG2, cfg2);
164
165
166 psize = ((isi->fmt.fmt.pix.width - 1) << ISI_PSIZE_PREV_HSIZE_OFFSET) &
167 ISI_PSIZE_PREV_HSIZE_MASK;
168 psize |= ((isi->fmt.fmt.pix.height - 1) << ISI_PSIZE_PREV_VSIZE_OFFSET) &
169 ISI_PSIZE_PREV_VSIZE_MASK;
170 isi_writel(isi, ISI_PSIZE, psize);
171 isi_writel(isi, ISI_PDECF, ISI_PDECF_NO_SAMPLING);
172}
173
174static irqreturn_t atmel_isi_handle_streaming(struct atmel_isi *isi)
175{
176 if (isi->active) {
177 struct vb2_v4l2_buffer *vbuf = &isi->active->vb;
178 struct frame_buffer *buf = isi->active;
179
180 list_del_init(&buf->list);
181 vbuf->vb2_buf.timestamp = ktime_get_ns();
182 vbuf->sequence = isi->sequence++;
183 vbuf->field = V4L2_FIELD_NONE;
184 vb2_buffer_done(&vbuf->vb2_buf, VB2_BUF_STATE_DONE);
185 }
186
187 if (list_empty(&isi->video_buffer_list)) {
188 isi->active = NULL;
189 } else {
190
191 isi->active = list_entry(isi->video_buffer_list.next,
192 struct frame_buffer, list);
193 if (!isi->enable_preview_path) {
194 isi_writel(isi, ISI_DMA_C_DSCR,
195 (u32)isi->active->p_dma_desc->fbd_phys);
196 isi_writel(isi, ISI_DMA_C_CTRL,
197 ISI_DMA_CTRL_FETCH | ISI_DMA_CTRL_DONE);
198 isi_writel(isi, ISI_DMA_CHER, ISI_DMA_CHSR_C_CH);
199 } else {
200 isi_writel(isi, ISI_DMA_P_DSCR,
201 (u32)isi->active->p_dma_desc->fbd_phys);
202 isi_writel(isi, ISI_DMA_P_CTRL,
203 ISI_DMA_CTRL_FETCH | ISI_DMA_CTRL_DONE);
204 isi_writel(isi, ISI_DMA_CHER, ISI_DMA_CHSR_P_CH);
205 }
206 }
207 return IRQ_HANDLED;
208}
209
210
211static irqreturn_t isi_interrupt(int irq, void *dev_id)
212{
213 struct atmel_isi *isi = dev_id;
214 u32 status, mask, pending;
215 irqreturn_t ret = IRQ_NONE;
216
217 spin_lock(&isi->irqlock);
218
219 status = isi_readl(isi, ISI_STATUS);
220 mask = isi_readl(isi, ISI_INTMASK);
221 pending = status & mask;
222
223 if (pending & ISI_CTRL_SRST) {
224 complete(&isi->complete);
225 isi_writel(isi, ISI_INTDIS, ISI_CTRL_SRST);
226 ret = IRQ_HANDLED;
227 } else if (pending & ISI_CTRL_DIS) {
228 complete(&isi->complete);
229 isi_writel(isi, ISI_INTDIS, ISI_CTRL_DIS);
230 ret = IRQ_HANDLED;
231 } else {
232 if (likely(pending & ISI_SR_CXFR_DONE) ||
233 likely(pending & ISI_SR_PXFR_DONE))
234 ret = atmel_isi_handle_streaming(isi);
235 }
236
237 spin_unlock(&isi->irqlock);
238 return ret;
239}
240
241#define WAIT_ISI_RESET 1
242#define WAIT_ISI_DISABLE 0
243static int atmel_isi_wait_status(struct atmel_isi *isi, int wait_reset)
244{
245 unsigned long timeout;
246
247
248
249
250 init_completion(&isi->complete);
251
252 if (wait_reset) {
253 isi_writel(isi, ISI_INTEN, ISI_CTRL_SRST);
254 isi_writel(isi, ISI_CTRL, ISI_CTRL_SRST);
255 } else {
256 isi_writel(isi, ISI_INTEN, ISI_CTRL_DIS);
257 isi_writel(isi, ISI_CTRL, ISI_CTRL_DIS);
258 }
259
260 timeout = wait_for_completion_timeout(&isi->complete,
261 msecs_to_jiffies(500));
262 if (timeout == 0)
263 return -ETIMEDOUT;
264
265 return 0;
266}
267
268
269
270
271static int queue_setup(struct vb2_queue *vq,
272 unsigned int *nbuffers, unsigned int *nplanes,
273 unsigned int sizes[], struct device *alloc_devs[])
274{
275 struct atmel_isi *isi = vb2_get_drv_priv(vq);
276 unsigned long size;
277
278 size = isi->fmt.fmt.pix.sizeimage;
279
280
281 if (*nplanes)
282 return sizes[0] < size ? -EINVAL : 0;
283
284 *nplanes = 1;
285 sizes[0] = size;
286
287 isi->active = NULL;
288
289 dev_dbg(isi->dev, "%s, count=%d, size=%ld\n", __func__,
290 *nbuffers, size);
291
292 return 0;
293}
294
295static int buffer_init(struct vb2_buffer *vb)
296{
297 struct vb2_v4l2_buffer *vbuf = to_vb2_v4l2_buffer(vb);
298 struct frame_buffer *buf = container_of(vbuf, struct frame_buffer, vb);
299
300 buf->p_dma_desc = NULL;
301 INIT_LIST_HEAD(&buf->list);
302
303 return 0;
304}
305
306static int buffer_prepare(struct vb2_buffer *vb)
307{
308 struct vb2_v4l2_buffer *vbuf = to_vb2_v4l2_buffer(vb);
309 struct frame_buffer *buf = container_of(vbuf, struct frame_buffer, vb);
310 struct atmel_isi *isi = vb2_get_drv_priv(vb->vb2_queue);
311 unsigned long size;
312 struct isi_dma_desc *desc;
313
314 size = isi->fmt.fmt.pix.sizeimage;
315
316 if (vb2_plane_size(vb, 0) < size) {
317 dev_err(isi->dev, "%s data will not fit into plane (%lu < %lu)\n",
318 __func__, vb2_plane_size(vb, 0), size);
319 return -EINVAL;
320 }
321
322 vb2_set_plane_payload(vb, 0, size);
323
324 if (!buf->p_dma_desc) {
325 if (list_empty(&isi->dma_desc_head)) {
326 dev_err(isi->dev, "Not enough dma descriptors.\n");
327 return -EINVAL;
328 } else {
329
330 desc = list_entry(isi->dma_desc_head.next,
331 struct isi_dma_desc, list);
332
333 list_del_init(&desc->list);
334
335
336 desc->p_fbd->fb_address =
337 vb2_dma_contig_plane_dma_addr(vb, 0);
338 desc->p_fbd->next_fbd_address = 0;
339 set_dma_ctrl(desc->p_fbd, ISI_DMA_CTRL_WB);
340
341 buf->p_dma_desc = desc;
342 }
343 }
344 return 0;
345}
346
347static void buffer_cleanup(struct vb2_buffer *vb)
348{
349 struct vb2_v4l2_buffer *vbuf = to_vb2_v4l2_buffer(vb);
350 struct atmel_isi *isi = vb2_get_drv_priv(vb->vb2_queue);
351 struct frame_buffer *buf = container_of(vbuf, struct frame_buffer, vb);
352
353
354 if (buf->p_dma_desc)
355 list_add(&buf->p_dma_desc->list, &isi->dma_desc_head);
356}
357
358static void start_dma(struct atmel_isi *isi, struct frame_buffer *buffer)
359{
360 u32 ctrl, cfg1;
361
362 cfg1 = isi_readl(isi, ISI_CFG1);
363
364 isi_writel(isi, ISI_INTEN,
365 ISI_SR_CXFR_DONE | ISI_SR_PXFR_DONE);
366
367
368 if (!isi->enable_preview_path) {
369 if (isi_readl(isi, ISI_STATUS) & ISI_CTRL_CDC) {
370 dev_err(isi->dev, "Already in frame handling.\n");
371 return;
372 }
373
374 isi_writel(isi, ISI_DMA_C_DSCR,
375 (u32)buffer->p_dma_desc->fbd_phys);
376 isi_writel(isi, ISI_DMA_C_CTRL,
377 ISI_DMA_CTRL_FETCH | ISI_DMA_CTRL_DONE);
378 isi_writel(isi, ISI_DMA_CHER, ISI_DMA_CHSR_C_CH);
379 } else {
380 isi_writel(isi, ISI_DMA_P_DSCR,
381 (u32)buffer->p_dma_desc->fbd_phys);
382 isi_writel(isi, ISI_DMA_P_CTRL,
383 ISI_DMA_CTRL_FETCH | ISI_DMA_CTRL_DONE);
384 isi_writel(isi, ISI_DMA_CHER, ISI_DMA_CHSR_P_CH);
385 }
386
387 cfg1 &= ~ISI_CFG1_FRATE_DIV_MASK;
388
389 cfg1 |= isi->pdata.frate | ISI_CFG1_DISCR;
390
391
392 ctrl = ISI_CTRL_EN;
393
394 if (!isi->enable_preview_path)
395 ctrl |= ISI_CTRL_CDC;
396
397 isi_writel(isi, ISI_CTRL, ctrl);
398 isi_writel(isi, ISI_CFG1, cfg1);
399}
400
401static void buffer_queue(struct vb2_buffer *vb)
402{
403 struct vb2_v4l2_buffer *vbuf = to_vb2_v4l2_buffer(vb);
404 struct atmel_isi *isi = vb2_get_drv_priv(vb->vb2_queue);
405 struct frame_buffer *buf = container_of(vbuf, struct frame_buffer, vb);
406 unsigned long flags = 0;
407
408 spin_lock_irqsave(&isi->irqlock, flags);
409 list_add_tail(&buf->list, &isi->video_buffer_list);
410
411 if (!isi->active) {
412 isi->active = buf;
413 if (vb2_is_streaming(vb->vb2_queue))
414 start_dma(isi, buf);
415 }
416 spin_unlock_irqrestore(&isi->irqlock, flags);
417}
418
419static int start_streaming(struct vb2_queue *vq, unsigned int count)
420{
421 struct atmel_isi *isi = vb2_get_drv_priv(vq);
422 struct frame_buffer *buf, *node;
423 int ret;
424
425 pm_runtime_get_sync(isi->dev);
426
427
428 ret = v4l2_subdev_call(isi->entity.subdev, video, s_stream, 1);
429 if (ret && ret != -ENOIOCTLCMD) {
430 dev_err(isi->dev, "stream on failed in subdev\n");
431 goto err_start_stream;
432 }
433
434
435 ret = atmel_isi_wait_status(isi, WAIT_ISI_RESET);
436 if (ret < 0) {
437 dev_err(isi->dev, "Reset ISI timed out\n");
438 goto err_reset;
439 }
440
441 isi_writel(isi, ISI_INTDIS, (u32)~0UL);
442
443 isi->sequence = 0;
444 configure_geometry(isi);
445
446 spin_lock_irq(&isi->irqlock);
447
448 isi_readl(isi, ISI_STATUS);
449
450 start_dma(isi, isi->active);
451 spin_unlock_irq(&isi->irqlock);
452
453 return 0;
454
455err_reset:
456 v4l2_subdev_call(isi->entity.subdev, video, s_stream, 0);
457
458err_start_stream:
459 pm_runtime_put(isi->dev);
460
461 spin_lock_irq(&isi->irqlock);
462 isi->active = NULL;
463
464 list_for_each_entry_safe(buf, node, &isi->video_buffer_list, list) {
465 list_del_init(&buf->list);
466 vb2_buffer_done(&buf->vb.vb2_buf, VB2_BUF_STATE_QUEUED);
467 }
468 spin_unlock_irq(&isi->irqlock);
469
470 return ret;
471}
472
473
474static void stop_streaming(struct vb2_queue *vq)
475{
476 struct atmel_isi *isi = vb2_get_drv_priv(vq);
477 struct frame_buffer *buf, *node;
478 int ret = 0;
479 unsigned long timeout;
480
481
482 ret = v4l2_subdev_call(isi->entity.subdev, video, s_stream, 0);
483 if (ret && ret != -ENOIOCTLCMD)
484 dev_err(isi->dev, "stream off failed in subdev\n");
485
486 spin_lock_irq(&isi->irqlock);
487 isi->active = NULL;
488
489 list_for_each_entry_safe(buf, node, &isi->video_buffer_list, list) {
490 list_del_init(&buf->list);
491 vb2_buffer_done(&buf->vb.vb2_buf, VB2_BUF_STATE_ERROR);
492 }
493 spin_unlock_irq(&isi->irqlock);
494
495 if (!isi->enable_preview_path) {
496 timeout = jiffies + (FRAME_INTERVAL_MILLI_SEC * HZ) / 1000;
497
498 while ((isi_readl(isi, ISI_STATUS) & ISI_CTRL_CDC) &&
499 time_before(jiffies, timeout))
500 msleep(1);
501
502 if (time_after(jiffies, timeout))
503 dev_err(isi->dev,
504 "Timeout waiting for finishing codec request\n");
505 }
506
507
508 isi_writel(isi, ISI_INTDIS,
509 ISI_SR_CXFR_DONE | ISI_SR_PXFR_DONE);
510
511
512 ret = atmel_isi_wait_status(isi, WAIT_ISI_DISABLE);
513 if (ret < 0)
514 dev_err(isi->dev, "Disable ISI timed out\n");
515
516 pm_runtime_put(isi->dev);
517}
518
519static const struct vb2_ops isi_video_qops = {
520 .queue_setup = queue_setup,
521 .buf_init = buffer_init,
522 .buf_prepare = buffer_prepare,
523 .buf_cleanup = buffer_cleanup,
524 .buf_queue = buffer_queue,
525 .start_streaming = start_streaming,
526 .stop_streaming = stop_streaming,
527 .wait_prepare = vb2_ops_wait_prepare,
528 .wait_finish = vb2_ops_wait_finish,
529};
530
531static int isi_g_fmt_vid_cap(struct file *file, void *priv,
532 struct v4l2_format *fmt)
533{
534 struct atmel_isi *isi = video_drvdata(file);
535
536 *fmt = isi->fmt;
537
538 return 0;
539}
540
541static const struct isi_format *find_format_by_fourcc(struct atmel_isi *isi,
542 unsigned int fourcc)
543{
544 unsigned int num_formats = isi->num_user_formats;
545 const struct isi_format *fmt;
546 unsigned int i;
547
548 for (i = 0; i < num_formats; i++) {
549 fmt = isi->user_formats[i];
550 if (fmt->fourcc == fourcc)
551 return fmt;
552 }
553
554 return NULL;
555}
556
557static int isi_try_fmt(struct atmel_isi *isi, struct v4l2_format *f,
558 const struct isi_format **current_fmt)
559{
560 const struct isi_format *isi_fmt;
561 struct v4l2_pix_format *pixfmt = &f->fmt.pix;
562 struct v4l2_subdev_pad_config pad_cfg;
563 struct v4l2_subdev_format format = {
564 .which = V4L2_SUBDEV_FORMAT_TRY,
565 };
566 int ret;
567
568 isi_fmt = find_format_by_fourcc(isi, pixfmt->pixelformat);
569 if (!isi_fmt) {
570 isi_fmt = isi->user_formats[isi->num_user_formats - 1];
571 pixfmt->pixelformat = isi_fmt->fourcc;
572 }
573
574
575 pixfmt->width = clamp(pixfmt->width, 0U, MAX_SUPPORT_WIDTH);
576 pixfmt->height = clamp(pixfmt->height, 0U, MAX_SUPPORT_HEIGHT);
577
578 v4l2_fill_mbus_format(&format.format, pixfmt, isi_fmt->mbus_code);
579 ret = v4l2_subdev_call(isi->entity.subdev, pad, set_fmt,
580 &pad_cfg, &format);
581 if (ret < 0)
582 return ret;
583
584 v4l2_fill_pix_format(pixfmt, &format.format);
585
586 pixfmt->field = V4L2_FIELD_NONE;
587 pixfmt->bytesperline = pixfmt->width * isi_fmt->bpp;
588 pixfmt->sizeimage = pixfmt->bytesperline * pixfmt->height;
589
590 if (current_fmt)
591 *current_fmt = isi_fmt;
592
593 return 0;
594}
595
596static int isi_set_fmt(struct atmel_isi *isi, struct v4l2_format *f)
597{
598 struct v4l2_subdev_format format = {
599 .which = V4L2_SUBDEV_FORMAT_ACTIVE,
600 };
601 const struct isi_format *current_fmt;
602 int ret;
603
604 ret = isi_try_fmt(isi, f, ¤t_fmt);
605 if (ret)
606 return ret;
607
608 v4l2_fill_mbus_format(&format.format, &f->fmt.pix,
609 current_fmt->mbus_code);
610 ret = v4l2_subdev_call(isi->entity.subdev, pad,
611 set_fmt, NULL, &format);
612 if (ret < 0)
613 return ret;
614
615 isi->fmt = *f;
616 isi->current_fmt = current_fmt;
617
618 return 0;
619}
620
621static int isi_s_fmt_vid_cap(struct file *file, void *priv,
622 struct v4l2_format *f)
623{
624 struct atmel_isi *isi = video_drvdata(file);
625
626 if (vb2_is_streaming(&isi->queue))
627 return -EBUSY;
628
629 return isi_set_fmt(isi, f);
630}
631
632static int isi_try_fmt_vid_cap(struct file *file, void *priv,
633 struct v4l2_format *f)
634{
635 struct atmel_isi *isi = video_drvdata(file);
636
637 return isi_try_fmt(isi, f, NULL);
638}
639
640static int isi_enum_fmt_vid_cap(struct file *file, void *priv,
641 struct v4l2_fmtdesc *f)
642{
643 struct atmel_isi *isi = video_drvdata(file);
644
645 if (f->index >= isi->num_user_formats)
646 return -EINVAL;
647
648 f->pixelformat = isi->user_formats[f->index]->fourcc;
649 return 0;
650}
651
652static int isi_querycap(struct file *file, void *priv,
653 struct v4l2_capability *cap)
654{
655 strscpy(cap->driver, "atmel-isi", sizeof(cap->driver));
656 strscpy(cap->card, "Atmel Image Sensor Interface", sizeof(cap->card));
657 strscpy(cap->bus_info, "platform:isi", sizeof(cap->bus_info));
658 return 0;
659}
660
661static int isi_enum_input(struct file *file, void *priv,
662 struct v4l2_input *i)
663{
664 if (i->index != 0)
665 return -EINVAL;
666
667 i->type = V4L2_INPUT_TYPE_CAMERA;
668 strscpy(i->name, "Camera", sizeof(i->name));
669 return 0;
670}
671
672static int isi_g_input(struct file *file, void *priv, unsigned int *i)
673{
674 *i = 0;
675 return 0;
676}
677
678static int isi_s_input(struct file *file, void *priv, unsigned int i)
679{
680 if (i > 0)
681 return -EINVAL;
682 return 0;
683}
684
685static int isi_g_parm(struct file *file, void *fh, struct v4l2_streamparm *a)
686{
687 struct atmel_isi *isi = video_drvdata(file);
688
689 return v4l2_g_parm_cap(video_devdata(file), isi->entity.subdev, a);
690}
691
692static int isi_s_parm(struct file *file, void *fh, struct v4l2_streamparm *a)
693{
694 struct atmel_isi *isi = video_drvdata(file);
695
696 return v4l2_s_parm_cap(video_devdata(file), isi->entity.subdev, a);
697}
698
699static int isi_enum_framesizes(struct file *file, void *fh,
700 struct v4l2_frmsizeenum *fsize)
701{
702 struct atmel_isi *isi = video_drvdata(file);
703 const struct isi_format *isi_fmt;
704 struct v4l2_subdev_frame_size_enum fse = {
705 .index = fsize->index,
706 .which = V4L2_SUBDEV_FORMAT_ACTIVE,
707 };
708 int ret;
709
710 isi_fmt = find_format_by_fourcc(isi, fsize->pixel_format);
711 if (!isi_fmt)
712 return -EINVAL;
713
714 fse.code = isi_fmt->mbus_code;
715
716 ret = v4l2_subdev_call(isi->entity.subdev, pad, enum_frame_size,
717 NULL, &fse);
718 if (ret)
719 return ret;
720
721 fsize->type = V4L2_FRMSIZE_TYPE_DISCRETE;
722 fsize->discrete.width = fse.max_width;
723 fsize->discrete.height = fse.max_height;
724
725 return 0;
726}
727
728static int isi_enum_frameintervals(struct file *file, void *fh,
729 struct v4l2_frmivalenum *fival)
730{
731 struct atmel_isi *isi = video_drvdata(file);
732 const struct isi_format *isi_fmt;
733 struct v4l2_subdev_frame_interval_enum fie = {
734 .index = fival->index,
735 .width = fival->width,
736 .height = fival->height,
737 .which = V4L2_SUBDEV_FORMAT_ACTIVE,
738 };
739 int ret;
740
741 isi_fmt = find_format_by_fourcc(isi, fival->pixel_format);
742 if (!isi_fmt)
743 return -EINVAL;
744
745 fie.code = isi_fmt->mbus_code;
746
747 ret = v4l2_subdev_call(isi->entity.subdev, pad,
748 enum_frame_interval, NULL, &fie);
749 if (ret)
750 return ret;
751
752 fival->type = V4L2_FRMIVAL_TYPE_DISCRETE;
753 fival->discrete = fie.interval;
754
755 return 0;
756}
757
758static void isi_camera_set_bus_param(struct atmel_isi *isi)
759{
760 u32 cfg1 = 0;
761
762
763 if (isi->pdata.hsync_act_low)
764 cfg1 |= ISI_CFG1_HSYNC_POL_ACTIVE_LOW;
765 if (isi->pdata.vsync_act_low)
766 cfg1 |= ISI_CFG1_VSYNC_POL_ACTIVE_LOW;
767 if (isi->pdata.pclk_act_falling)
768 cfg1 |= ISI_CFG1_PIXCLK_POL_ACTIVE_FALLING;
769 if (isi->pdata.has_emb_sync)
770 cfg1 |= ISI_CFG1_EMB_SYNC;
771 if (isi->pdata.full_mode)
772 cfg1 |= ISI_CFG1_FULL_MODE;
773
774 cfg1 |= ISI_CFG1_THMASK_BEATS_16;
775
776
777 pm_runtime_get_sync(isi->dev);
778
779 isi_writel(isi, ISI_CTRL, ISI_CTRL_DIS);
780 isi_writel(isi, ISI_CFG1, cfg1);
781
782 pm_runtime_put(isi->dev);
783}
784
785
786static int atmel_isi_parse_dt(struct atmel_isi *isi,
787 struct platform_device *pdev)
788{
789 struct device_node *np = pdev->dev.of_node;
790 struct v4l2_fwnode_endpoint ep = { .bus_type = 0 };
791 int err;
792
793
794 isi->pdata.full_mode = 1;
795 isi->pdata.frate = ISI_CFG1_FRATE_CAPTURE_ALL;
796
797 np = of_graph_get_next_endpoint(np, NULL);
798 if (!np) {
799 dev_err(&pdev->dev, "Could not find the endpoint\n");
800 return -EINVAL;
801 }
802
803 err = v4l2_fwnode_endpoint_parse(of_fwnode_handle(np), &ep);
804 of_node_put(np);
805 if (err) {
806 dev_err(&pdev->dev, "Could not parse the endpoint\n");
807 return err;
808 }
809
810 switch (ep.bus.parallel.bus_width) {
811 case 8:
812 isi->pdata.data_width_flags = ISI_DATAWIDTH_8;
813 break;
814 case 10:
815 isi->pdata.data_width_flags =
816 ISI_DATAWIDTH_8 | ISI_DATAWIDTH_10;
817 break;
818 default:
819 dev_err(&pdev->dev, "Unsupported bus width: %d\n",
820 ep.bus.parallel.bus_width);
821 return -EINVAL;
822 }
823
824 if (ep.bus.parallel.flags & V4L2_MBUS_HSYNC_ACTIVE_LOW)
825 isi->pdata.hsync_act_low = true;
826 if (ep.bus.parallel.flags & V4L2_MBUS_VSYNC_ACTIVE_LOW)
827 isi->pdata.vsync_act_low = true;
828 if (ep.bus.parallel.flags & V4L2_MBUS_PCLK_SAMPLE_FALLING)
829 isi->pdata.pclk_act_falling = true;
830
831 if (ep.bus_type == V4L2_MBUS_BT656)
832 isi->pdata.has_emb_sync = true;
833
834 return 0;
835}
836
837static int isi_open(struct file *file)
838{
839 struct atmel_isi *isi = video_drvdata(file);
840 struct v4l2_subdev *sd = isi->entity.subdev;
841 int ret;
842
843 if (mutex_lock_interruptible(&isi->lock))
844 return -ERESTARTSYS;
845
846 ret = v4l2_fh_open(file);
847 if (ret < 0)
848 goto unlock;
849
850 if (!v4l2_fh_is_singular_file(file))
851 goto fh_rel;
852
853 ret = v4l2_subdev_call(sd, core, s_power, 1);
854 if (ret < 0 && ret != -ENOIOCTLCMD)
855 goto fh_rel;
856
857 ret = isi_set_fmt(isi, &isi->fmt);
858 if (ret)
859 v4l2_subdev_call(sd, core, s_power, 0);
860fh_rel:
861 if (ret)
862 v4l2_fh_release(file);
863unlock:
864 mutex_unlock(&isi->lock);
865 return ret;
866}
867
868static int isi_release(struct file *file)
869{
870 struct atmel_isi *isi = video_drvdata(file);
871 struct v4l2_subdev *sd = isi->entity.subdev;
872 bool fh_singular;
873 int ret;
874
875 mutex_lock(&isi->lock);
876
877 fh_singular = v4l2_fh_is_singular_file(file);
878
879 ret = _vb2_fop_release(file, NULL);
880
881 if (fh_singular)
882 v4l2_subdev_call(sd, core, s_power, 0);
883
884 mutex_unlock(&isi->lock);
885
886 return ret;
887}
888
889static const struct v4l2_ioctl_ops isi_ioctl_ops = {
890 .vidioc_querycap = isi_querycap,
891
892 .vidioc_try_fmt_vid_cap = isi_try_fmt_vid_cap,
893 .vidioc_g_fmt_vid_cap = isi_g_fmt_vid_cap,
894 .vidioc_s_fmt_vid_cap = isi_s_fmt_vid_cap,
895 .vidioc_enum_fmt_vid_cap = isi_enum_fmt_vid_cap,
896
897 .vidioc_enum_input = isi_enum_input,
898 .vidioc_g_input = isi_g_input,
899 .vidioc_s_input = isi_s_input,
900
901 .vidioc_g_parm = isi_g_parm,
902 .vidioc_s_parm = isi_s_parm,
903 .vidioc_enum_framesizes = isi_enum_framesizes,
904 .vidioc_enum_frameintervals = isi_enum_frameintervals,
905
906 .vidioc_reqbufs = vb2_ioctl_reqbufs,
907 .vidioc_create_bufs = vb2_ioctl_create_bufs,
908 .vidioc_querybuf = vb2_ioctl_querybuf,
909 .vidioc_qbuf = vb2_ioctl_qbuf,
910 .vidioc_dqbuf = vb2_ioctl_dqbuf,
911 .vidioc_expbuf = vb2_ioctl_expbuf,
912 .vidioc_prepare_buf = vb2_ioctl_prepare_buf,
913 .vidioc_streamon = vb2_ioctl_streamon,
914 .vidioc_streamoff = vb2_ioctl_streamoff,
915
916 .vidioc_log_status = v4l2_ctrl_log_status,
917 .vidioc_subscribe_event = v4l2_ctrl_subscribe_event,
918 .vidioc_unsubscribe_event = v4l2_event_unsubscribe,
919};
920
921static const struct v4l2_file_operations isi_fops = {
922 .owner = THIS_MODULE,
923 .unlocked_ioctl = video_ioctl2,
924 .open = isi_open,
925 .release = isi_release,
926 .poll = vb2_fop_poll,
927 .mmap = vb2_fop_mmap,
928 .read = vb2_fop_read,
929};
930
931static int isi_set_default_fmt(struct atmel_isi *isi)
932{
933 struct v4l2_format f = {
934 .type = V4L2_BUF_TYPE_VIDEO_CAPTURE,
935 .fmt.pix = {
936 .width = VGA_WIDTH,
937 .height = VGA_HEIGHT,
938 .field = V4L2_FIELD_NONE,
939 .pixelformat = isi->user_formats[0]->fourcc,
940 },
941 };
942 int ret;
943
944 ret = isi_try_fmt(isi, &f, NULL);
945 if (ret)
946 return ret;
947 isi->current_fmt = isi->user_formats[0];
948 isi->fmt = f;
949 return 0;
950}
951
952static const struct isi_format isi_formats[] = {
953 {
954 .fourcc = V4L2_PIX_FMT_YUYV,
955 .mbus_code = MEDIA_BUS_FMT_YUYV8_2X8,
956 .bpp = 2,
957 .swap = ISI_CFG2_YCC_SWAP_DEFAULT,
958 }, {
959 .fourcc = V4L2_PIX_FMT_YUYV,
960 .mbus_code = MEDIA_BUS_FMT_YVYU8_2X8,
961 .bpp = 2,
962 .swap = ISI_CFG2_YCC_SWAP_MODE_1,
963 }, {
964 .fourcc = V4L2_PIX_FMT_YUYV,
965 .mbus_code = MEDIA_BUS_FMT_UYVY8_2X8,
966 .bpp = 2,
967 .swap = ISI_CFG2_YCC_SWAP_MODE_2,
968 }, {
969 .fourcc = V4L2_PIX_FMT_YUYV,
970 .mbus_code = MEDIA_BUS_FMT_VYUY8_2X8,
971 .bpp = 2,
972 .swap = ISI_CFG2_YCC_SWAP_MODE_3,
973 }, {
974 .fourcc = V4L2_PIX_FMT_RGB565,
975 .mbus_code = MEDIA_BUS_FMT_YUYV8_2X8,
976 .bpp = 2,
977 .swap = ISI_CFG2_YCC_SWAP_MODE_2,
978 }, {
979 .fourcc = V4L2_PIX_FMT_RGB565,
980 .mbus_code = MEDIA_BUS_FMT_YVYU8_2X8,
981 .bpp = 2,
982 .swap = ISI_CFG2_YCC_SWAP_MODE_3,
983 }, {
984 .fourcc = V4L2_PIX_FMT_RGB565,
985 .mbus_code = MEDIA_BUS_FMT_UYVY8_2X8,
986 .bpp = 2,
987 .swap = ISI_CFG2_YCC_SWAP_DEFAULT,
988 }, {
989 .fourcc = V4L2_PIX_FMT_RGB565,
990 .mbus_code = MEDIA_BUS_FMT_VYUY8_2X8,
991 .bpp = 2,
992 .swap = ISI_CFG2_YCC_SWAP_MODE_1,
993 },
994};
995
996static int isi_formats_init(struct atmel_isi *isi)
997{
998 const struct isi_format *isi_fmts[ARRAY_SIZE(isi_formats)];
999 unsigned int num_fmts = 0, i, j;
1000 struct v4l2_subdev *subdev = isi->entity.subdev;
1001 struct v4l2_subdev_mbus_code_enum mbus_code = {
1002 .which = V4L2_SUBDEV_FORMAT_ACTIVE,
1003 };
1004
1005 while (!v4l2_subdev_call(subdev, pad, enum_mbus_code,
1006 NULL, &mbus_code)) {
1007 for (i = 0; i < ARRAY_SIZE(isi_formats); i++) {
1008 if (isi_formats[i].mbus_code != mbus_code.code)
1009 continue;
1010
1011
1012 for (j = 0; j < num_fmts; j++)
1013 if (isi_fmts[j]->fourcc == isi_formats[i].fourcc)
1014
1015 break;
1016 if (j == num_fmts)
1017
1018 isi_fmts[num_fmts++] = isi_formats + i;
1019 }
1020 mbus_code.index++;
1021 }
1022
1023 if (!num_fmts)
1024 return -ENXIO;
1025
1026 isi->num_user_formats = num_fmts;
1027 isi->user_formats = devm_kcalloc(isi->dev,
1028 num_fmts, sizeof(struct isi_format *),
1029 GFP_KERNEL);
1030 if (!isi->user_formats)
1031 return -ENOMEM;
1032
1033 memcpy(isi->user_formats, isi_fmts,
1034 num_fmts * sizeof(struct isi_format *));
1035 isi->current_fmt = isi->user_formats[0];
1036
1037 return 0;
1038}
1039
1040static int isi_graph_notify_complete(struct v4l2_async_notifier *notifier)
1041{
1042 struct atmel_isi *isi = notifier_to_isi(notifier);
1043 int ret;
1044
1045 isi->vdev->ctrl_handler = isi->entity.subdev->ctrl_handler;
1046 ret = isi_formats_init(isi);
1047 if (ret) {
1048 dev_err(isi->dev, "No supported mediabus format found\n");
1049 return ret;
1050 }
1051 isi_camera_set_bus_param(isi);
1052
1053 ret = isi_set_default_fmt(isi);
1054 if (ret) {
1055 dev_err(isi->dev, "Could not set default format\n");
1056 return ret;
1057 }
1058
1059 ret = video_register_device(isi->vdev, VFL_TYPE_GRABBER, -1);
1060 if (ret) {
1061 dev_err(isi->dev, "Failed to register video device\n");
1062 return ret;
1063 }
1064
1065 dev_dbg(isi->dev, "Device registered as %s\n",
1066 video_device_node_name(isi->vdev));
1067 return 0;
1068}
1069
1070static void isi_graph_notify_unbind(struct v4l2_async_notifier *notifier,
1071 struct v4l2_subdev *sd,
1072 struct v4l2_async_subdev *asd)
1073{
1074 struct atmel_isi *isi = notifier_to_isi(notifier);
1075
1076 dev_dbg(isi->dev, "Removing %s\n", video_device_node_name(isi->vdev));
1077
1078
1079 video_unregister_device(isi->vdev);
1080}
1081
1082static int isi_graph_notify_bound(struct v4l2_async_notifier *notifier,
1083 struct v4l2_subdev *subdev,
1084 struct v4l2_async_subdev *asd)
1085{
1086 struct atmel_isi *isi = notifier_to_isi(notifier);
1087
1088 dev_dbg(isi->dev, "subdev %s bound\n", subdev->name);
1089
1090 isi->entity.subdev = subdev;
1091
1092 return 0;
1093}
1094
1095static const struct v4l2_async_notifier_operations isi_graph_notify_ops = {
1096 .bound = isi_graph_notify_bound,
1097 .unbind = isi_graph_notify_unbind,
1098 .complete = isi_graph_notify_complete,
1099};
1100
1101static int isi_graph_parse(struct atmel_isi *isi, struct device_node *node)
1102{
1103 struct device_node *ep = NULL;
1104 struct device_node *remote;
1105
1106 ep = of_graph_get_next_endpoint(node, ep);
1107 if (!ep)
1108 return -EINVAL;
1109
1110 remote = of_graph_get_remote_port_parent(ep);
1111 of_node_put(ep);
1112 if (!remote)
1113 return -EINVAL;
1114
1115
1116 isi->entity.node = remote;
1117 isi->entity.asd.match_type = V4L2_ASYNC_MATCH_FWNODE;
1118 isi->entity.asd.match.fwnode = of_fwnode_handle(remote);
1119 return 0;
1120}
1121
1122static int isi_graph_init(struct atmel_isi *isi)
1123{
1124 int ret;
1125
1126
1127 ret = isi_graph_parse(isi, isi->dev->of_node);
1128 if (ret < 0) {
1129 dev_err(isi->dev, "Graph parsing failed\n");
1130 return ret;
1131 }
1132
1133 v4l2_async_notifier_init(&isi->notifier);
1134
1135 ret = v4l2_async_notifier_add_subdev(&isi->notifier, &isi->entity.asd);
1136 if (ret) {
1137 of_node_put(isi->entity.node);
1138 return ret;
1139 }
1140
1141 isi->notifier.ops = &isi_graph_notify_ops;
1142
1143 ret = v4l2_async_notifier_register(&isi->v4l2_dev, &isi->notifier);
1144 if (ret < 0) {
1145 dev_err(isi->dev, "Notifier registration failed\n");
1146 v4l2_async_notifier_cleanup(&isi->notifier);
1147 return ret;
1148 }
1149
1150 return 0;
1151}
1152
1153
1154static int atmel_isi_probe(struct platform_device *pdev)
1155{
1156 int irq;
1157 struct atmel_isi *isi;
1158 struct vb2_queue *q;
1159 struct resource *regs;
1160 int ret, i;
1161
1162 isi = devm_kzalloc(&pdev->dev, sizeof(struct atmel_isi), GFP_KERNEL);
1163 if (!isi)
1164 return -ENOMEM;
1165
1166 isi->pclk = devm_clk_get(&pdev->dev, "isi_clk");
1167 if (IS_ERR(isi->pclk))
1168 return PTR_ERR(isi->pclk);
1169
1170 ret = atmel_isi_parse_dt(isi, pdev);
1171 if (ret)
1172 return ret;
1173
1174 isi->active = NULL;
1175 isi->dev = &pdev->dev;
1176 mutex_init(&isi->lock);
1177 spin_lock_init(&isi->irqlock);
1178 INIT_LIST_HEAD(&isi->video_buffer_list);
1179 INIT_LIST_HEAD(&isi->dma_desc_head);
1180
1181 q = &isi->queue;
1182
1183
1184 ret = v4l2_device_register(&pdev->dev, &isi->v4l2_dev);
1185 if (ret)
1186 return ret;
1187
1188 isi->vdev = video_device_alloc();
1189 if (!isi->vdev) {
1190 ret = -ENOMEM;
1191 goto err_vdev_alloc;
1192 }
1193
1194
1195 isi->vdev->fops = &isi_fops;
1196 isi->vdev->v4l2_dev = &isi->v4l2_dev;
1197 isi->vdev->queue = &isi->queue;
1198 strscpy(isi->vdev->name, KBUILD_MODNAME, sizeof(isi->vdev->name));
1199 isi->vdev->release = video_device_release;
1200 isi->vdev->ioctl_ops = &isi_ioctl_ops;
1201 isi->vdev->lock = &isi->lock;
1202 isi->vdev->device_caps = V4L2_CAP_VIDEO_CAPTURE | V4L2_CAP_STREAMING |
1203 V4L2_CAP_READWRITE;
1204 video_set_drvdata(isi->vdev, isi);
1205
1206
1207 q->type = V4L2_BUF_TYPE_VIDEO_CAPTURE;
1208 q->io_modes = VB2_MMAP | VB2_READ | VB2_DMABUF;
1209 q->lock = &isi->lock;
1210 q->drv_priv = isi;
1211 q->buf_struct_size = sizeof(struct frame_buffer);
1212 q->ops = &isi_video_qops;
1213 q->mem_ops = &vb2_dma_contig_memops;
1214 q->timestamp_flags = V4L2_BUF_FLAG_TIMESTAMP_MONOTONIC;
1215 q->min_buffers_needed = 2;
1216 q->dev = &pdev->dev;
1217
1218 ret = vb2_queue_init(q);
1219 if (ret < 0) {
1220 dev_err(&pdev->dev, "failed to initialize VB2 queue\n");
1221 goto err_vb2_queue;
1222 }
1223 isi->p_fb_descriptors = dma_alloc_coherent(&pdev->dev,
1224 sizeof(struct fbd) * VIDEO_MAX_FRAME,
1225 &isi->fb_descriptors_phys,
1226 GFP_KERNEL);
1227 if (!isi->p_fb_descriptors) {
1228 dev_err(&pdev->dev, "Can't allocate descriptors!\n");
1229 ret = -ENOMEM;
1230 goto err_dma_alloc;
1231 }
1232
1233 for (i = 0; i < VIDEO_MAX_FRAME; i++) {
1234 isi->dma_desc[i].p_fbd = isi->p_fb_descriptors + i;
1235 isi->dma_desc[i].fbd_phys = isi->fb_descriptors_phys +
1236 i * sizeof(struct fbd);
1237 list_add(&isi->dma_desc[i].list, &isi->dma_desc_head);
1238 }
1239
1240 regs = platform_get_resource(pdev, IORESOURCE_MEM, 0);
1241 isi->regs = devm_ioremap_resource(&pdev->dev, regs);
1242 if (IS_ERR(isi->regs)) {
1243 ret = PTR_ERR(isi->regs);
1244 goto err_ioremap;
1245 }
1246
1247 if (isi->pdata.data_width_flags & ISI_DATAWIDTH_8)
1248 isi->width_flags = 1 << 7;
1249 if (isi->pdata.data_width_flags & ISI_DATAWIDTH_10)
1250 isi->width_flags |= 1 << 9;
1251
1252 irq = platform_get_irq(pdev, 0);
1253 if (irq < 0) {
1254 ret = irq;
1255 goto err_req_irq;
1256 }
1257
1258 ret = devm_request_irq(&pdev->dev, irq, isi_interrupt, 0, "isi", isi);
1259 if (ret) {
1260 dev_err(&pdev->dev, "Unable to request irq %d\n", irq);
1261 goto err_req_irq;
1262 }
1263 isi->irq = irq;
1264
1265 ret = isi_graph_init(isi);
1266 if (ret < 0)
1267 goto err_req_irq;
1268
1269 pm_suspend_ignore_children(&pdev->dev, true);
1270 pm_runtime_enable(&pdev->dev);
1271 platform_set_drvdata(pdev, isi);
1272 return 0;
1273
1274err_req_irq:
1275err_ioremap:
1276 dma_free_coherent(&pdev->dev,
1277 sizeof(struct fbd) * VIDEO_MAX_FRAME,
1278 isi->p_fb_descriptors,
1279 isi->fb_descriptors_phys);
1280err_dma_alloc:
1281err_vb2_queue:
1282 video_device_release(isi->vdev);
1283err_vdev_alloc:
1284 v4l2_device_unregister(&isi->v4l2_dev);
1285
1286 return ret;
1287}
1288
1289static int atmel_isi_remove(struct platform_device *pdev)
1290{
1291 struct atmel_isi *isi = platform_get_drvdata(pdev);
1292
1293 dma_free_coherent(&pdev->dev,
1294 sizeof(struct fbd) * VIDEO_MAX_FRAME,
1295 isi->p_fb_descriptors,
1296 isi->fb_descriptors_phys);
1297 pm_runtime_disable(&pdev->dev);
1298 v4l2_async_notifier_unregister(&isi->notifier);
1299 v4l2_async_notifier_cleanup(&isi->notifier);
1300 v4l2_device_unregister(&isi->v4l2_dev);
1301
1302 return 0;
1303}
1304
1305#ifdef CONFIG_PM
1306static int atmel_isi_runtime_suspend(struct device *dev)
1307{
1308 struct atmel_isi *isi = dev_get_drvdata(dev);
1309
1310 clk_disable_unprepare(isi->pclk);
1311
1312 return 0;
1313}
1314static int atmel_isi_runtime_resume(struct device *dev)
1315{
1316 struct atmel_isi *isi = dev_get_drvdata(dev);
1317
1318 return clk_prepare_enable(isi->pclk);
1319}
1320#endif
1321
1322static const struct dev_pm_ops atmel_isi_dev_pm_ops = {
1323 SET_RUNTIME_PM_OPS(atmel_isi_runtime_suspend,
1324 atmel_isi_runtime_resume, NULL)
1325};
1326
1327static const struct of_device_id atmel_isi_of_match[] = {
1328 { .compatible = "atmel,at91sam9g45-isi" },
1329 { }
1330};
1331MODULE_DEVICE_TABLE(of, atmel_isi_of_match);
1332
1333static struct platform_driver atmel_isi_driver = {
1334 .driver = {
1335 .name = "atmel_isi",
1336 .of_match_table = of_match_ptr(atmel_isi_of_match),
1337 .pm = &atmel_isi_dev_pm_ops,
1338 },
1339 .probe = atmel_isi_probe,
1340 .remove = atmel_isi_remove,
1341};
1342
1343module_platform_driver(atmel_isi_driver);
1344
1345MODULE_AUTHOR("Josh Wu <josh.wu@atmel.com>");
1346MODULE_DESCRIPTION("The V4L2 driver for Atmel Linux");
1347MODULE_LICENSE("GPL");
1348MODULE_SUPPORTED_DEVICE("video");
1349
