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[media] sh_mobile_ceu_camera: implement the control handler
[deliverable/linux.git] / drivers / media / video / sh_mobile_ceu_camera.c
1 /*
2 * V4L2 Driver for SuperH Mobile CEU interface
3 *
4 * Copyright (C) 2008 Magnus Damm
5 *
6 * Based on V4L2 Driver for PXA camera host - "pxa_camera.c",
7 *
8 * Copyright (C) 2006, Sascha Hauer, Pengutronix
9 * Copyright (C) 2008, Guennadi Liakhovetski <kernel@pengutronix.de>
10 *
11 * This program is free software; you can redistribute it and/or modify
12 * it under the terms of the GNU General Public License as published by
13 * the Free Software Foundation; either version 2 of the License, or
14 * (at your option) any later version.
15 */
16
17 #include <linux/init.h>
18 #include <linux/module.h>
19 #include <linux/io.h>
20 #include <linux/completion.h>
21 #include <linux/delay.h>
22 #include <linux/dma-mapping.h>
23 #include <linux/errno.h>
24 #include <linux/fs.h>
25 #include <linux/interrupt.h>
26 #include <linux/kernel.h>
27 #include <linux/mm.h>
28 #include <linux/moduleparam.h>
29 #include <linux/time.h>
30 #include <linux/slab.h>
31 #include <linux/device.h>
32 #include <linux/platform_device.h>
33 #include <linux/videodev2.h>
34 #include <linux/pm_runtime.h>
35 #include <linux/sched.h>
36
37 #include <media/v4l2-common.h>
38 #include <media/v4l2-dev.h>
39 #include <media/soc_camera.h>
40 #include <media/sh_mobile_ceu.h>
41 #include <media/sh_mobile_csi2.h>
42 #include <media/videobuf2-dma-contig.h>
43 #include <media/v4l2-mediabus.h>
44 #include <media/soc_mediabus.h>
45
46 /* register offsets for sh7722 / sh7723 */
47
48 #define CAPSR 0x00 /* Capture start register */
49 #define CAPCR 0x04 /* Capture control register */
50 #define CAMCR 0x08 /* Capture interface control register */
51 #define CMCYR 0x0c /* Capture interface cycle register */
52 #define CAMOR 0x10 /* Capture interface offset register */
53 #define CAPWR 0x14 /* Capture interface width register */
54 #define CAIFR 0x18 /* Capture interface input format register */
55 #define CSTCR 0x20 /* Camera strobe control register (<= sh7722) */
56 #define CSECR 0x24 /* Camera strobe emission count register (<= sh7722) */
57 #define CRCNTR 0x28 /* CEU register control register */
58 #define CRCMPR 0x2c /* CEU register forcible control register */
59 #define CFLCR 0x30 /* Capture filter control register */
60 #define CFSZR 0x34 /* Capture filter size clip register */
61 #define CDWDR 0x38 /* Capture destination width register */
62 #define CDAYR 0x3c /* Capture data address Y register */
63 #define CDACR 0x40 /* Capture data address C register */
64 #define CDBYR 0x44 /* Capture data bottom-field address Y register */
65 #define CDBCR 0x48 /* Capture data bottom-field address C register */
66 #define CBDSR 0x4c /* Capture bundle destination size register */
67 #define CFWCR 0x5c /* Firewall operation control register */
68 #define CLFCR 0x60 /* Capture low-pass filter control register */
69 #define CDOCR 0x64 /* Capture data output control register */
70 #define CDDCR 0x68 /* Capture data complexity level register */
71 #define CDDAR 0x6c /* Capture data complexity level address register */
72 #define CEIER 0x70 /* Capture event interrupt enable register */
73 #define CETCR 0x74 /* Capture event flag clear register */
74 #define CSTSR 0x7c /* Capture status register */
75 #define CSRTR 0x80 /* Capture software reset register */
76 #define CDSSR 0x84 /* Capture data size register */
77 #define CDAYR2 0x90 /* Capture data address Y register 2 */
78 #define CDACR2 0x94 /* Capture data address C register 2 */
79 #define CDBYR2 0x98 /* Capture data bottom-field address Y register 2 */
80 #define CDBCR2 0x9c /* Capture data bottom-field address C register 2 */
81
82 #undef DEBUG_GEOMETRY
83 #ifdef DEBUG_GEOMETRY
84 #define dev_geo dev_info
85 #else
86 #define dev_geo dev_dbg
87 #endif
88
89 /* per video frame buffer */
90 struct sh_mobile_ceu_buffer {
91 struct vb2_buffer vb; /* v4l buffer must be first */
92 struct list_head queue;
93 enum v4l2_mbus_pixelcode code;
94 };
95
96 struct sh_mobile_ceu_dev {
97 struct soc_camera_host ici;
98 struct soc_camera_device *icd;
99 struct platform_device *csi2_pdev;
100
101 unsigned int irq;
102 void __iomem *base;
103 unsigned long video_limit;
104
105 spinlock_t lock; /* Protects video buffer lists */
106 struct list_head capture;
107 struct vb2_buffer *active;
108 struct vb2_alloc_ctx *alloc_ctx;
109
110 struct sh_mobile_ceu_info *pdata;
111 struct completion complete;
112
113 u32 cflcr;
114
115 enum v4l2_field field;
116 int sequence;
117
118 unsigned int image_mode:1;
119 unsigned int is_16bit:1;
120 unsigned int frozen:1;
121 };
122
123 struct sh_mobile_ceu_cam {
124 /* CEU offsets within the camera output, before the CEU scaler */
125 unsigned int ceu_left;
126 unsigned int ceu_top;
127 /* Client output, as seen by the CEU */
128 unsigned int width;
129 unsigned int height;
130 /*
131 * User window from S_CROP / G_CROP, produced by client cropping and
132 * scaling, CEU scaling and CEU cropping, mapped back onto the client
133 * input window
134 */
135 struct v4l2_rect subrect;
136 /* Camera cropping rectangle */
137 struct v4l2_rect rect;
138 const struct soc_mbus_pixelfmt *extra_fmt;
139 enum v4l2_mbus_pixelcode code;
140 };
141
142 static struct sh_mobile_ceu_buffer *to_ceu_vb(struct vb2_buffer *vb)
143 {
144 return container_of(vb, struct sh_mobile_ceu_buffer, vb);
145 }
146
147 static void ceu_write(struct sh_mobile_ceu_dev *priv,
148 unsigned long reg_offs, u32 data)
149 {
150 iowrite32(data, priv->base + reg_offs);
151 }
152
153 static u32 ceu_read(struct sh_mobile_ceu_dev *priv, unsigned long reg_offs)
154 {
155 return ioread32(priv->base + reg_offs);
156 }
157
158 static int sh_mobile_ceu_soft_reset(struct sh_mobile_ceu_dev *pcdev)
159 {
160 int i, success = 0;
161 struct soc_camera_device *icd = pcdev->icd;
162
163 ceu_write(pcdev, CAPSR, 1 << 16); /* reset */
164
165 /* wait CSTSR.CPTON bit */
166 for (i = 0; i < 1000; i++) {
167 if (!(ceu_read(pcdev, CSTSR) & 1)) {
168 success++;
169 break;
170 }
171 udelay(1);
172 }
173
174 /* wait CAPSR.CPKIL bit */
175 for (i = 0; i < 1000; i++) {
176 if (!(ceu_read(pcdev, CAPSR) & (1 << 16))) {
177 success++;
178 break;
179 }
180 udelay(1);
181 }
182
183
184 if (2 != success) {
185 dev_warn(icd->pdev, "soft reset time out\n");
186 return -EIO;
187 }
188
189 return 0;
190 }
191
192 /*
193 * Videobuf operations
194 */
195 static int sh_mobile_ceu_videobuf_setup(struct vb2_queue *vq,
196 const struct v4l2_format *fmt,
197 unsigned int *count, unsigned int *num_planes,
198 unsigned int sizes[], void *alloc_ctxs[])
199 {
200 struct soc_camera_device *icd = container_of(vq, struct soc_camera_device, vb2_vidq);
201 struct soc_camera_host *ici = to_soc_camera_host(icd->parent);
202 struct sh_mobile_ceu_dev *pcdev = ici->priv;
203 int bytes_per_line = soc_mbus_bytes_per_line(icd->user_width,
204 icd->current_fmt->host_fmt);
205
206 if (bytes_per_line < 0)
207 return bytes_per_line;
208
209 *num_planes = 1;
210
211 pcdev->sequence = 0;
212 sizes[0] = bytes_per_line * icd->user_height;
213 alloc_ctxs[0] = pcdev->alloc_ctx;
214
215 if (!*count)
216 *count = 2;
217
218 if (pcdev->video_limit) {
219 if (PAGE_ALIGN(sizes[0]) * *count > pcdev->video_limit)
220 *count = pcdev->video_limit / PAGE_ALIGN(sizes[0]);
221 }
222
223 dev_dbg(icd->parent, "count=%d, size=%u\n", *count, sizes[0]);
224
225 return 0;
226 }
227
228 #define CEU_CETCR_MAGIC 0x0317f313 /* acknowledge magical interrupt sources */
229 #define CEU_CETCR_IGRW (1 << 4) /* prohibited register access interrupt bit */
230 #define CEU_CEIER_CPEIE (1 << 0) /* one-frame capture end interrupt */
231 #define CEU_CEIER_VBP (1 << 20) /* vbp error */
232 #define CEU_CAPCR_CTNCP (1 << 16) /* continuous capture mode (if set) */
233 #define CEU_CEIER_MASK (CEU_CEIER_CPEIE | CEU_CEIER_VBP)
234
235
236 /*
237 * return value doesn't reflex the success/failure to queue the new buffer,
238 * but rather the status of the previous buffer.
239 */
240 static int sh_mobile_ceu_capture(struct sh_mobile_ceu_dev *pcdev)
241 {
242 struct soc_camera_device *icd = pcdev->icd;
243 dma_addr_t phys_addr_top, phys_addr_bottom;
244 unsigned long top1, top2;
245 unsigned long bottom1, bottom2;
246 u32 status;
247 bool planar;
248 int ret = 0;
249
250 /*
251 * The hardware is _very_ picky about this sequence. Especially
252 * the CEU_CETCR_MAGIC value. It seems like we need to acknowledge
253 * several not-so-well documented interrupt sources in CETCR.
254 */
255 ceu_write(pcdev, CEIER, ceu_read(pcdev, CEIER) & ~CEU_CEIER_MASK);
256 status = ceu_read(pcdev, CETCR);
257 ceu_write(pcdev, CETCR, ~status & CEU_CETCR_MAGIC);
258 if (!pcdev->frozen)
259 ceu_write(pcdev, CEIER, ceu_read(pcdev, CEIER) | CEU_CEIER_MASK);
260 ceu_write(pcdev, CAPCR, ceu_read(pcdev, CAPCR) & ~CEU_CAPCR_CTNCP);
261 ceu_write(pcdev, CETCR, CEU_CETCR_MAGIC ^ CEU_CETCR_IGRW);
262
263 /*
264 * When a VBP interrupt occurs, a capture end interrupt does not occur
265 * and the image of that frame is not captured correctly. So, soft reset
266 * is needed here.
267 */
268 if (status & CEU_CEIER_VBP) {
269 sh_mobile_ceu_soft_reset(pcdev);
270 ret = -EIO;
271 }
272
273 if (pcdev->frozen) {
274 complete(&pcdev->complete);
275 return ret;
276 }
277
278 if (!pcdev->active)
279 return ret;
280
281 if (V4L2_FIELD_INTERLACED_BT == pcdev->field) {
282 top1 = CDBYR;
283 top2 = CDBCR;
284 bottom1 = CDAYR;
285 bottom2 = CDACR;
286 } else {
287 top1 = CDAYR;
288 top2 = CDACR;
289 bottom1 = CDBYR;
290 bottom2 = CDBCR;
291 }
292
293 phys_addr_top = vb2_dma_contig_plane_dma_addr(pcdev->active, 0);
294
295 switch (icd->current_fmt->host_fmt->fourcc) {
296 case V4L2_PIX_FMT_NV12:
297 case V4L2_PIX_FMT_NV21:
298 case V4L2_PIX_FMT_NV16:
299 case V4L2_PIX_FMT_NV61:
300 planar = true;
301 break;
302 default:
303 planar = false;
304 }
305
306 ceu_write(pcdev, top1, phys_addr_top);
307 if (V4L2_FIELD_NONE != pcdev->field) {
308 if (planar)
309 phys_addr_bottom = phys_addr_top + icd->user_width;
310 else
311 phys_addr_bottom = phys_addr_top +
312 soc_mbus_bytes_per_line(icd->user_width,
313 icd->current_fmt->host_fmt);
314 ceu_write(pcdev, bottom1, phys_addr_bottom);
315 }
316
317 if (planar) {
318 phys_addr_top += icd->user_width *
319 icd->user_height;
320 ceu_write(pcdev, top2, phys_addr_top);
321 if (V4L2_FIELD_NONE != pcdev->field) {
322 phys_addr_bottom = phys_addr_top + icd->user_width;
323 ceu_write(pcdev, bottom2, phys_addr_bottom);
324 }
325 }
326
327 ceu_write(pcdev, CAPSR, 0x1); /* start capture */
328
329 return ret;
330 }
331
332 static int sh_mobile_ceu_videobuf_prepare(struct vb2_buffer *vb)
333 {
334 struct soc_camera_device *icd = container_of(vb->vb2_queue, struct soc_camera_device, vb2_vidq);
335 struct sh_mobile_ceu_buffer *buf;
336 int bytes_per_line = soc_mbus_bytes_per_line(icd->user_width,
337 icd->current_fmt->host_fmt);
338 unsigned long size;
339
340 if (bytes_per_line < 0)
341 return bytes_per_line;
342
343 buf = to_ceu_vb(vb);
344
345 dev_dbg(icd->parent, "%s (vb=0x%p) 0x%p %lu\n", __func__,
346 vb, vb2_plane_vaddr(vb, 0), vb2_get_plane_payload(vb, 0));
347
348 /* Added list head initialization on alloc */
349 WARN(!list_empty(&buf->queue), "Buffer %p on queue!\n", vb);
350
351 #ifdef DEBUG
352 /*
353 * This can be useful if you want to see if we actually fill
354 * the buffer with something
355 */
356 if (vb2_plane_vaddr(vb, 0))
357 memset(vb2_plane_vaddr(vb, 0), 0xaa, vb2_get_plane_payload(vb, 0));
358 #endif
359
360 BUG_ON(NULL == icd->current_fmt);
361
362 size = icd->user_height * bytes_per_line;
363
364 if (vb2_plane_size(vb, 0) < size) {
365 dev_err(icd->parent, "Buffer too small (%lu < %lu)\n",
366 vb2_plane_size(vb, 0), size);
367 return -ENOBUFS;
368 }
369
370 vb2_set_plane_payload(vb, 0, size);
371
372 return 0;
373 }
374
375 static void sh_mobile_ceu_videobuf_queue(struct vb2_buffer *vb)
376 {
377 struct soc_camera_device *icd = container_of(vb->vb2_queue, struct soc_camera_device, vb2_vidq);
378 struct soc_camera_host *ici = to_soc_camera_host(icd->parent);
379 struct sh_mobile_ceu_dev *pcdev = ici->priv;
380 struct sh_mobile_ceu_buffer *buf = to_ceu_vb(vb);
381
382 dev_dbg(icd->parent, "%s (vb=0x%p) 0x%p %lu\n", __func__,
383 vb, vb2_plane_vaddr(vb, 0), vb2_get_plane_payload(vb, 0));
384
385 spin_lock_irq(&pcdev->lock);
386 list_add_tail(&buf->queue, &pcdev->capture);
387
388 if (!pcdev->active) {
389 /*
390 * Because there were no active buffer at this moment,
391 * we are not interested in the return value of
392 * sh_mobile_ceu_capture here.
393 */
394 pcdev->active = vb;
395 sh_mobile_ceu_capture(pcdev);
396 }
397 spin_unlock_irq(&pcdev->lock);
398 }
399
400 static void sh_mobile_ceu_videobuf_release(struct vb2_buffer *vb)
401 {
402 struct soc_camera_device *icd = container_of(vb->vb2_queue, struct soc_camera_device, vb2_vidq);
403 struct soc_camera_host *ici = to_soc_camera_host(icd->parent);
404 struct sh_mobile_ceu_buffer *buf = to_ceu_vb(vb);
405 struct sh_mobile_ceu_dev *pcdev = ici->priv;
406
407 spin_lock_irq(&pcdev->lock);
408
409 if (pcdev->active == vb) {
410 /* disable capture (release DMA buffer), reset */
411 ceu_write(pcdev, CAPSR, 1 << 16);
412 pcdev->active = NULL;
413 }
414
415 /*
416 * Doesn't hurt also if the list is empty, but it hurts, if queuing the
417 * buffer failed, and .buf_init() hasn't been called
418 */
419 if (buf->queue.next)
420 list_del_init(&buf->queue);
421
422 spin_unlock_irq(&pcdev->lock);
423 }
424
425 static int sh_mobile_ceu_videobuf_init(struct vb2_buffer *vb)
426 {
427 /* This is for locking debugging only */
428 INIT_LIST_HEAD(&to_ceu_vb(vb)->queue);
429 return 0;
430 }
431
432 static int sh_mobile_ceu_stop_streaming(struct vb2_queue *q)
433 {
434 struct soc_camera_device *icd = container_of(q, struct soc_camera_device, vb2_vidq);
435 struct soc_camera_host *ici = to_soc_camera_host(icd->parent);
436 struct sh_mobile_ceu_dev *pcdev = ici->priv;
437 struct list_head *buf_head, *tmp;
438
439 spin_lock_irq(&pcdev->lock);
440
441 pcdev->active = NULL;
442
443 list_for_each_safe(buf_head, tmp, &pcdev->capture)
444 list_del_init(buf_head);
445
446 spin_unlock_irq(&pcdev->lock);
447
448 return sh_mobile_ceu_soft_reset(pcdev);
449 }
450
451 static struct vb2_ops sh_mobile_ceu_videobuf_ops = {
452 .queue_setup = sh_mobile_ceu_videobuf_setup,
453 .buf_prepare = sh_mobile_ceu_videobuf_prepare,
454 .buf_queue = sh_mobile_ceu_videobuf_queue,
455 .buf_cleanup = sh_mobile_ceu_videobuf_release,
456 .buf_init = sh_mobile_ceu_videobuf_init,
457 .wait_prepare = soc_camera_unlock,
458 .wait_finish = soc_camera_lock,
459 .stop_streaming = sh_mobile_ceu_stop_streaming,
460 };
461
462 static irqreturn_t sh_mobile_ceu_irq(int irq, void *data)
463 {
464 struct sh_mobile_ceu_dev *pcdev = data;
465 struct vb2_buffer *vb;
466 int ret;
467
468 spin_lock(&pcdev->lock);
469
470 vb = pcdev->active;
471 if (!vb)
472 /* Stale interrupt from a released buffer */
473 goto out;
474
475 list_del_init(&to_ceu_vb(vb)->queue);
476
477 if (!list_empty(&pcdev->capture))
478 pcdev->active = &list_entry(pcdev->capture.next,
479 struct sh_mobile_ceu_buffer, queue)->vb;
480 else
481 pcdev->active = NULL;
482
483 ret = sh_mobile_ceu_capture(pcdev);
484 do_gettimeofday(&vb->v4l2_buf.timestamp);
485 if (!ret) {
486 vb->v4l2_buf.field = pcdev->field;
487 vb->v4l2_buf.sequence = pcdev->sequence++;
488 }
489 vb2_buffer_done(vb, ret < 0 ? VB2_BUF_STATE_ERROR : VB2_BUF_STATE_DONE);
490
491 out:
492 spin_unlock(&pcdev->lock);
493
494 return IRQ_HANDLED;
495 }
496
497 static struct v4l2_subdev *find_csi2(struct sh_mobile_ceu_dev *pcdev)
498 {
499 struct v4l2_subdev *sd;
500
501 if (!pcdev->csi2_pdev)
502 return NULL;
503
504 v4l2_device_for_each_subdev(sd, &pcdev->ici.v4l2_dev)
505 if (&pcdev->csi2_pdev->dev == v4l2_get_subdevdata(sd))
506 return sd;
507
508 return NULL;
509 }
510
511 /* Called with .video_lock held */
512 static int sh_mobile_ceu_add_device(struct soc_camera_device *icd)
513 {
514 struct soc_camera_host *ici = to_soc_camera_host(icd->parent);
515 struct sh_mobile_ceu_dev *pcdev = ici->priv;
516 struct v4l2_subdev *csi2_sd;
517 int ret;
518
519 if (pcdev->icd)
520 return -EBUSY;
521
522 dev_info(icd->parent,
523 "SuperH Mobile CEU driver attached to camera %d\n",
524 icd->devnum);
525
526 pm_runtime_get_sync(ici->v4l2_dev.dev);
527
528 ret = sh_mobile_ceu_soft_reset(pcdev);
529
530 csi2_sd = find_csi2(pcdev);
531
532 ret = v4l2_subdev_call(csi2_sd, core, s_power, 1);
533 if (ret != -ENODEV && ret != -ENOIOCTLCMD && ret < 0) {
534 pm_runtime_put_sync(ici->v4l2_dev.dev);
535 } else {
536 pcdev->icd = icd;
537 ret = 0;
538 }
539
540 return ret;
541 }
542
543 /* Called with .video_lock held */
544 static void sh_mobile_ceu_remove_device(struct soc_camera_device *icd)
545 {
546 struct soc_camera_host *ici = to_soc_camera_host(icd->parent);
547 struct sh_mobile_ceu_dev *pcdev = ici->priv;
548 struct v4l2_subdev *csi2_sd = find_csi2(pcdev);
549
550 BUG_ON(icd != pcdev->icd);
551
552 v4l2_subdev_call(csi2_sd, core, s_power, 0);
553 /* disable capture, disable interrupts */
554 ceu_write(pcdev, CEIER, 0);
555 sh_mobile_ceu_soft_reset(pcdev);
556
557 /* make sure active buffer is canceled */
558 spin_lock_irq(&pcdev->lock);
559 if (pcdev->active) {
560 list_del_init(&to_ceu_vb(pcdev->active)->queue);
561 vb2_buffer_done(pcdev->active, VB2_BUF_STATE_ERROR);
562 pcdev->active = NULL;
563 }
564 spin_unlock_irq(&pcdev->lock);
565
566 pm_runtime_put_sync(ici->v4l2_dev.dev);
567
568 dev_info(icd->parent,
569 "SuperH Mobile CEU driver detached from camera %d\n",
570 icd->devnum);
571
572 pcdev->icd = NULL;
573 }
574
575 /*
576 * See chapter 29.4.12 "Capture Filter Control Register (CFLCR)"
577 * in SH7722 Hardware Manual
578 */
579 static unsigned int size_dst(unsigned int src, unsigned int scale)
580 {
581 unsigned int mant_pre = scale >> 12;
582 if (!src || !scale)
583 return src;
584 return ((mant_pre + 2 * (src - 1)) / (2 * mant_pre) - 1) *
585 mant_pre * 4096 / scale + 1;
586 }
587
588 static u16 calc_scale(unsigned int src, unsigned int *dst)
589 {
590 u16 scale;
591
592 if (src == *dst)
593 return 0;
594
595 scale = (src * 4096 / *dst) & ~7;
596
597 while (scale > 4096 && size_dst(src, scale) < *dst)
598 scale -= 8;
599
600 *dst = size_dst(src, scale);
601
602 return scale;
603 }
604
605 /* rect is guaranteed to not exceed the scaled camera rectangle */
606 static void sh_mobile_ceu_set_rect(struct soc_camera_device *icd)
607 {
608 struct soc_camera_host *ici = to_soc_camera_host(icd->parent);
609 struct sh_mobile_ceu_cam *cam = icd->host_priv;
610 struct sh_mobile_ceu_dev *pcdev = ici->priv;
611 unsigned int height, width, cdwdr_width, in_width, in_height;
612 unsigned int left_offset, top_offset;
613 u32 camor;
614
615 dev_geo(icd->parent, "Crop %ux%u@%u:%u\n",
616 icd->user_width, icd->user_height, cam->ceu_left, cam->ceu_top);
617
618 left_offset = cam->ceu_left;
619 top_offset = cam->ceu_top;
620
621 WARN_ON(icd->user_width & 3 || icd->user_height & 3);
622
623 width = icd->user_width;
624
625 if (pcdev->image_mode) {
626 in_width = cam->width;
627 if (!pcdev->is_16bit) {
628 in_width *= 2;
629 left_offset *= 2;
630 }
631 cdwdr_width = width;
632 } else {
633 int bytes_per_line = soc_mbus_bytes_per_line(width,
634 icd->current_fmt->host_fmt);
635 unsigned int w_factor;
636
637 switch (icd->current_fmt->host_fmt->packing) {
638 case SOC_MBUS_PACKING_2X8_PADHI:
639 w_factor = 2;
640 break;
641 default:
642 w_factor = 1;
643 }
644
645 in_width = cam->width * w_factor;
646 left_offset *= w_factor;
647
648 if (bytes_per_line < 0)
649 cdwdr_width = width;
650 else
651 cdwdr_width = bytes_per_line;
652 }
653
654 height = icd->user_height;
655 in_height = cam->height;
656 if (V4L2_FIELD_NONE != pcdev->field) {
657 height = (height / 2) & ~3;
658 in_height /= 2;
659 top_offset /= 2;
660 cdwdr_width *= 2;
661 }
662
663 /* CSI2 special configuration */
664 if (pcdev->pdata->csi2) {
665 in_width = ((in_width - 2) * 2);
666 left_offset *= 2;
667 }
668
669 /* Set CAMOR, CAPWR, CFSZR, take care of CDWDR */
670 camor = left_offset | (top_offset << 16);
671
672 dev_geo(icd->parent,
673 "CAMOR 0x%x, CAPWR 0x%x, CFSZR 0x%x, CDWDR 0x%x\n", camor,
674 (in_height << 16) | in_width, (height << 16) | width,
675 cdwdr_width);
676
677 ceu_write(pcdev, CAMOR, camor);
678 ceu_write(pcdev, CAPWR, (in_height << 16) | in_width);
679 /* CFSZR clipping is applied _after_ the scaling filter (CFLCR) */
680 ceu_write(pcdev, CFSZR, (height << 16) | width);
681 ceu_write(pcdev, CDWDR, cdwdr_width);
682 }
683
684 static u32 capture_save_reset(struct sh_mobile_ceu_dev *pcdev)
685 {
686 u32 capsr = ceu_read(pcdev, CAPSR);
687 ceu_write(pcdev, CAPSR, 1 << 16); /* reset, stop capture */
688 return capsr;
689 }
690
691 static void capture_restore(struct sh_mobile_ceu_dev *pcdev, u32 capsr)
692 {
693 unsigned long timeout = jiffies + 10 * HZ;
694
695 /*
696 * Wait until the end of the current frame. It can take a long time,
697 * but if it has been aborted by a CAPSR reset, it shoule exit sooner.
698 */
699 while ((ceu_read(pcdev, CSTSR) & 1) && time_before(jiffies, timeout))
700 msleep(1);
701
702 if (time_after(jiffies, timeout)) {
703 dev_err(pcdev->ici.v4l2_dev.dev,
704 "Timeout waiting for frame end! Interface problem?\n");
705 return;
706 }
707
708 /* Wait until reset clears, this shall not hang... */
709 while (ceu_read(pcdev, CAPSR) & (1 << 16))
710 udelay(10);
711
712 /* Anything to restore? */
713 if (capsr & ~(1 << 16))
714 ceu_write(pcdev, CAPSR, capsr);
715 }
716
717 /* Find the bus subdevice driver, e.g., CSI2 */
718 static struct v4l2_subdev *find_bus_subdev(struct sh_mobile_ceu_dev *pcdev,
719 struct soc_camera_device *icd)
720 {
721 if (pcdev->csi2_pdev) {
722 struct v4l2_subdev *csi2_sd = find_csi2(pcdev);
723 if (csi2_sd && csi2_sd->grp_id == (u32)icd)
724 return csi2_sd;
725 }
726
727 return soc_camera_to_subdev(icd);
728 }
729
730 #define CEU_BUS_FLAGS (V4L2_MBUS_MASTER | \
731 V4L2_MBUS_PCLK_SAMPLE_RISING | \
732 V4L2_MBUS_HSYNC_ACTIVE_HIGH | \
733 V4L2_MBUS_HSYNC_ACTIVE_LOW | \
734 V4L2_MBUS_VSYNC_ACTIVE_HIGH | \
735 V4L2_MBUS_VSYNC_ACTIVE_LOW | \
736 V4L2_MBUS_DATA_ACTIVE_HIGH)
737
738 /* Capture is not running, no interrupts, no locking needed */
739 static int sh_mobile_ceu_set_bus_param(struct soc_camera_device *icd,
740 __u32 pixfmt)
741 {
742 struct soc_camera_host *ici = to_soc_camera_host(icd->parent);
743 struct sh_mobile_ceu_dev *pcdev = ici->priv;
744 struct v4l2_subdev *sd = find_bus_subdev(pcdev, icd);
745 struct sh_mobile_ceu_cam *cam = icd->host_priv;
746 struct v4l2_mbus_config cfg = {.type = V4L2_MBUS_PARALLEL,};
747 unsigned long value, common_flags = CEU_BUS_FLAGS;
748 u32 capsr = capture_save_reset(pcdev);
749 unsigned int yuv_lineskip;
750 int ret;
751
752 /*
753 * If the client doesn't implement g_mbus_config, we just use our
754 * platform data
755 */
756 ret = v4l2_subdev_call(sd, video, g_mbus_config, &cfg);
757 if (!ret) {
758 common_flags = soc_mbus_config_compatible(&cfg,
759 common_flags);
760 if (!common_flags)
761 return -EINVAL;
762 } else if (ret != -ENOIOCTLCMD) {
763 return ret;
764 }
765
766 /* Make choises, based on platform preferences */
767 if ((common_flags & V4L2_MBUS_HSYNC_ACTIVE_HIGH) &&
768 (common_flags & V4L2_MBUS_HSYNC_ACTIVE_LOW)) {
769 if (pcdev->pdata->flags & SH_CEU_FLAG_HSYNC_LOW)
770 common_flags &= ~V4L2_MBUS_HSYNC_ACTIVE_HIGH;
771 else
772 common_flags &= ~V4L2_MBUS_HSYNC_ACTIVE_LOW;
773 }
774
775 if ((common_flags & V4L2_MBUS_VSYNC_ACTIVE_HIGH) &&
776 (common_flags & V4L2_MBUS_VSYNC_ACTIVE_LOW)) {
777 if (pcdev->pdata->flags & SH_CEU_FLAG_VSYNC_LOW)
778 common_flags &= ~V4L2_MBUS_VSYNC_ACTIVE_HIGH;
779 else
780 common_flags &= ~V4L2_MBUS_VSYNC_ACTIVE_LOW;
781 }
782
783 cfg.flags = common_flags;
784 ret = v4l2_subdev_call(sd, video, s_mbus_config, &cfg);
785 if (ret < 0 && ret != -ENOIOCTLCMD)
786 return ret;
787
788 if (icd->current_fmt->host_fmt->bits_per_sample > 8)
789 pcdev->is_16bit = 1;
790 else
791 pcdev->is_16bit = 0;
792
793 ceu_write(pcdev, CRCNTR, 0);
794 ceu_write(pcdev, CRCMPR, 0);
795
796 value = 0x00000010; /* data fetch by default */
797 yuv_lineskip = 0x10;
798
799 switch (icd->current_fmt->host_fmt->fourcc) {
800 case V4L2_PIX_FMT_NV12:
801 case V4L2_PIX_FMT_NV21:
802 /* convert 4:2:2 -> 4:2:0 */
803 yuv_lineskip = 0; /* skip for NV12/21, no skip for NV16/61 */
804 /* fall-through */
805 case V4L2_PIX_FMT_NV16:
806 case V4L2_PIX_FMT_NV61:
807 switch (cam->code) {
808 case V4L2_MBUS_FMT_UYVY8_2X8:
809 value = 0x00000000; /* Cb0, Y0, Cr0, Y1 */
810 break;
811 case V4L2_MBUS_FMT_VYUY8_2X8:
812 value = 0x00000100; /* Cr0, Y0, Cb0, Y1 */
813 break;
814 case V4L2_MBUS_FMT_YUYV8_2X8:
815 value = 0x00000200; /* Y0, Cb0, Y1, Cr0 */
816 break;
817 case V4L2_MBUS_FMT_YVYU8_2X8:
818 value = 0x00000300; /* Y0, Cr0, Y1, Cb0 */
819 break;
820 default:
821 BUG();
822 }
823 }
824
825 if (icd->current_fmt->host_fmt->fourcc == V4L2_PIX_FMT_NV21 ||
826 icd->current_fmt->host_fmt->fourcc == V4L2_PIX_FMT_NV61)
827 value ^= 0x00000100; /* swap U, V to change from NV1x->NVx1 */
828
829 value |= common_flags & V4L2_MBUS_VSYNC_ACTIVE_LOW ? 1 << 1 : 0;
830 value |= common_flags & V4L2_MBUS_HSYNC_ACTIVE_LOW ? 1 << 0 : 0;
831 value |= pcdev->is_16bit ? 1 << 12 : 0;
832
833 /* CSI2 mode */
834 if (pcdev->pdata->csi2)
835 value |= 3 << 12;
836
837 ceu_write(pcdev, CAMCR, value);
838
839 ceu_write(pcdev, CAPCR, 0x00300000);
840
841 switch (pcdev->field) {
842 case V4L2_FIELD_INTERLACED_TB:
843 value = 0x101;
844 break;
845 case V4L2_FIELD_INTERLACED_BT:
846 value = 0x102;
847 break;
848 default:
849 value = 0;
850 break;
851 }
852 ceu_write(pcdev, CAIFR, value);
853
854 sh_mobile_ceu_set_rect(icd);
855 mdelay(1);
856
857 dev_geo(icd->parent, "CFLCR 0x%x\n", pcdev->cflcr);
858 ceu_write(pcdev, CFLCR, pcdev->cflcr);
859
860 /*
861 * A few words about byte order (observed in Big Endian mode)
862 *
863 * In data fetch mode bytes are received in chunks of 8 bytes.
864 * D0, D1, D2, D3, D4, D5, D6, D7 (D0 received first)
865 *
866 * The data is however by default written to memory in reverse order:
867 * D7, D6, D5, D4, D3, D2, D1, D0 (D7 written to lowest byte)
868 *
869 * The lowest three bits of CDOCR allows us to do swapping,
870 * using 7 we swap the data bytes to match the incoming order:
871 * D0, D1, D2, D3, D4, D5, D6, D7
872 */
873 value = 0x00000007 | yuv_lineskip;
874
875 ceu_write(pcdev, CDOCR, value);
876 ceu_write(pcdev, CFWCR, 0); /* keep "datafetch firewall" disabled */
877
878 dev_dbg(icd->parent, "S_FMT successful for %c%c%c%c %ux%u\n",
879 pixfmt & 0xff, (pixfmt >> 8) & 0xff,
880 (pixfmt >> 16) & 0xff, (pixfmt >> 24) & 0xff,
881 icd->user_width, icd->user_height);
882
883 capture_restore(pcdev, capsr);
884
885 /* not in bundle mode: skip CBDSR, CDAYR2, CDACR2, CDBYR2, CDBCR2 */
886 return 0;
887 }
888
889 static int sh_mobile_ceu_try_bus_param(struct soc_camera_device *icd,
890 unsigned char buswidth)
891 {
892 struct soc_camera_host *ici = to_soc_camera_host(icd->parent);
893 struct sh_mobile_ceu_dev *pcdev = ici->priv;
894 struct v4l2_subdev *sd = find_bus_subdev(pcdev, icd);
895 unsigned long common_flags = CEU_BUS_FLAGS;
896 struct v4l2_mbus_config cfg = {.type = V4L2_MBUS_PARALLEL,};
897 int ret;
898
899 ret = v4l2_subdev_call(sd, video, g_mbus_config, &cfg);
900 if (!ret)
901 common_flags = soc_mbus_config_compatible(&cfg,
902 common_flags);
903 else if (ret != -ENOIOCTLCMD)
904 return ret;
905
906 if (!common_flags || buswidth > 16)
907 return -EINVAL;
908
909 return 0;
910 }
911
912 static const struct soc_mbus_pixelfmt sh_mobile_ceu_formats[] = {
913 {
914 .fourcc = V4L2_PIX_FMT_NV12,
915 .name = "NV12",
916 .bits_per_sample = 8,
917 .packing = SOC_MBUS_PACKING_1_5X8,
918 .order = SOC_MBUS_ORDER_LE,
919 }, {
920 .fourcc = V4L2_PIX_FMT_NV21,
921 .name = "NV21",
922 .bits_per_sample = 8,
923 .packing = SOC_MBUS_PACKING_1_5X8,
924 .order = SOC_MBUS_ORDER_LE,
925 }, {
926 .fourcc = V4L2_PIX_FMT_NV16,
927 .name = "NV16",
928 .bits_per_sample = 8,
929 .packing = SOC_MBUS_PACKING_2X8_PADHI,
930 .order = SOC_MBUS_ORDER_LE,
931 }, {
932 .fourcc = V4L2_PIX_FMT_NV61,
933 .name = "NV61",
934 .bits_per_sample = 8,
935 .packing = SOC_MBUS_PACKING_2X8_PADHI,
936 .order = SOC_MBUS_ORDER_LE,
937 },
938 };
939
940 /* This will be corrected as we get more formats */
941 static bool sh_mobile_ceu_packing_supported(const struct soc_mbus_pixelfmt *fmt)
942 {
943 return fmt->packing == SOC_MBUS_PACKING_NONE ||
944 (fmt->bits_per_sample == 8 &&
945 fmt->packing == SOC_MBUS_PACKING_1_5X8) ||
946 (fmt->bits_per_sample == 8 &&
947 fmt->packing == SOC_MBUS_PACKING_2X8_PADHI) ||
948 (fmt->bits_per_sample > 8 &&
949 fmt->packing == SOC_MBUS_PACKING_EXTEND16);
950 }
951
952 static int client_g_rect(struct v4l2_subdev *sd, struct v4l2_rect *rect);
953
954 static struct soc_camera_device *ctrl_to_icd(struct v4l2_ctrl *ctrl)
955 {
956 return container_of(ctrl->handler, struct soc_camera_device,
957 ctrl_handler);
958 }
959
960 static int sh_mobile_ceu_s_ctrl(struct v4l2_ctrl *ctrl)
961 {
962 struct soc_camera_device *icd = ctrl_to_icd(ctrl);
963 struct soc_camera_host *ici = to_soc_camera_host(icd->parent);
964 struct sh_mobile_ceu_dev *pcdev = ici->priv;
965
966 switch (ctrl->id) {
967 case V4L2_CID_SHARPNESS:
968 switch (icd->current_fmt->host_fmt->fourcc) {
969 case V4L2_PIX_FMT_NV12:
970 case V4L2_PIX_FMT_NV21:
971 case V4L2_PIX_FMT_NV16:
972 case V4L2_PIX_FMT_NV61:
973 ceu_write(pcdev, CLFCR, !ctrl->val);
974 return 0;
975 }
976 break;
977 }
978
979 return -EINVAL;
980 }
981
982 static const struct v4l2_ctrl_ops sh_mobile_ceu_ctrl_ops = {
983 .s_ctrl = sh_mobile_ceu_s_ctrl,
984 };
985
986 static int sh_mobile_ceu_get_formats(struct soc_camera_device *icd, unsigned int idx,
987 struct soc_camera_format_xlate *xlate)
988 {
989 struct v4l2_subdev *sd = soc_camera_to_subdev(icd);
990 struct device *dev = icd->parent;
991 struct soc_camera_host *ici = to_soc_camera_host(dev);
992 struct sh_mobile_ceu_dev *pcdev = ici->priv;
993 int ret, k, n;
994 int formats = 0;
995 struct sh_mobile_ceu_cam *cam;
996 enum v4l2_mbus_pixelcode code;
997 const struct soc_mbus_pixelfmt *fmt;
998
999 ret = v4l2_subdev_call(sd, video, enum_mbus_fmt, idx, &code);
1000 if (ret < 0)
1001 /* No more formats */
1002 return 0;
1003
1004 fmt = soc_mbus_get_fmtdesc(code);
1005 if (!fmt) {
1006 dev_warn(dev, "unsupported format code #%u: %d\n", idx, code);
1007 return 0;
1008 }
1009
1010 if (!pcdev->pdata->csi2) {
1011 /* Are there any restrictions in the CSI-2 case? */
1012 ret = sh_mobile_ceu_try_bus_param(icd, fmt->bits_per_sample);
1013 if (ret < 0)
1014 return 0;
1015 }
1016
1017 if (!icd->host_priv) {
1018 struct v4l2_mbus_framefmt mf;
1019 struct v4l2_rect rect;
1020 int shift = 0;
1021
1022 /* Add our control */
1023 v4l2_ctrl_new_std(&icd->ctrl_handler, &sh_mobile_ceu_ctrl_ops,
1024 V4L2_CID_SHARPNESS, 0, 1, 1, 0);
1025 if (icd->ctrl_handler.error)
1026 return icd->ctrl_handler.error;
1027
1028 /* FIXME: subwindow is lost between close / open */
1029
1030 /* Cache current client geometry */
1031 ret = client_g_rect(sd, &rect);
1032 if (ret < 0)
1033 return ret;
1034
1035 /* First time */
1036 ret = v4l2_subdev_call(sd, video, g_mbus_fmt, &mf);
1037 if (ret < 0)
1038 return ret;
1039
1040 while ((mf.width > 2560 || mf.height > 1920) && shift < 4) {
1041 /* Try 2560x1920, 1280x960, 640x480, 320x240 */
1042 mf.width = 2560 >> shift;
1043 mf.height = 1920 >> shift;
1044 ret = v4l2_device_call_until_err(sd->v4l2_dev, (long)icd, video,
1045 s_mbus_fmt, &mf);
1046 if (ret < 0)
1047 return ret;
1048 shift++;
1049 }
1050
1051 if (shift == 4) {
1052 dev_err(dev, "Failed to configure the client below %ux%x\n",
1053 mf.width, mf.height);
1054 return -EIO;
1055 }
1056
1057 dev_geo(dev, "camera fmt %ux%u\n", mf.width, mf.height);
1058
1059 cam = kzalloc(sizeof(*cam), GFP_KERNEL);
1060 if (!cam)
1061 return -ENOMEM;
1062
1063 /* We are called with current camera crop, initialise subrect with it */
1064 cam->rect = rect;
1065 cam->subrect = rect;
1066
1067 cam->width = mf.width;
1068 cam->height = mf.height;
1069
1070 icd->host_priv = cam;
1071 } else {
1072 cam = icd->host_priv;
1073 }
1074
1075 /* Beginning of a pass */
1076 if (!idx)
1077 cam->extra_fmt = NULL;
1078
1079 switch (code) {
1080 case V4L2_MBUS_FMT_UYVY8_2X8:
1081 case V4L2_MBUS_FMT_VYUY8_2X8:
1082 case V4L2_MBUS_FMT_YUYV8_2X8:
1083 case V4L2_MBUS_FMT_YVYU8_2X8:
1084 if (cam->extra_fmt)
1085 break;
1086
1087 /*
1088 * Our case is simple so far: for any of the above four camera
1089 * formats we add all our four synthesized NV* formats, so,
1090 * just marking the device with a single flag suffices. If
1091 * the format generation rules are more complex, you would have
1092 * to actually hang your already added / counted formats onto
1093 * the host_priv pointer and check whether the format you're
1094 * going to add now is already there.
1095 */
1096 cam->extra_fmt = sh_mobile_ceu_formats;
1097
1098 n = ARRAY_SIZE(sh_mobile_ceu_formats);
1099 formats += n;
1100 for (k = 0; xlate && k < n; k++) {
1101 xlate->host_fmt = &sh_mobile_ceu_formats[k];
1102 xlate->code = code;
1103 xlate++;
1104 dev_dbg(dev, "Providing format %s using code %d\n",
1105 sh_mobile_ceu_formats[k].name, code);
1106 }
1107 break;
1108 default:
1109 if (!sh_mobile_ceu_packing_supported(fmt))
1110 return 0;
1111 }
1112
1113 /* Generic pass-through */
1114 formats++;
1115 if (xlate) {
1116 xlate->host_fmt = fmt;
1117 xlate->code = code;
1118 xlate++;
1119 dev_dbg(dev, "Providing format %s in pass-through mode\n",
1120 fmt->name);
1121 }
1122
1123 return formats;
1124 }
1125
1126 static void sh_mobile_ceu_put_formats(struct soc_camera_device *icd)
1127 {
1128 kfree(icd->host_priv);
1129 icd->host_priv = NULL;
1130 }
1131
1132 /* Check if any dimension of r1 is smaller than respective one of r2 */
1133 static bool is_smaller(struct v4l2_rect *r1, struct v4l2_rect *r2)
1134 {
1135 return r1->width < r2->width || r1->height < r2->height;
1136 }
1137
1138 /* Check if r1 fails to cover r2 */
1139 static bool is_inside(struct v4l2_rect *r1, struct v4l2_rect *r2)
1140 {
1141 return r1->left > r2->left || r1->top > r2->top ||
1142 r1->left + r1->width < r2->left + r2->width ||
1143 r1->top + r1->height < r2->top + r2->height;
1144 }
1145
1146 static unsigned int scale_down(unsigned int size, unsigned int scale)
1147 {
1148 return (size * 4096 + scale / 2) / scale;
1149 }
1150
1151 static unsigned int calc_generic_scale(unsigned int input, unsigned int output)
1152 {
1153 return (input * 4096 + output / 2) / output;
1154 }
1155
1156 /* Get and store current client crop */
1157 static int client_g_rect(struct v4l2_subdev *sd, struct v4l2_rect *rect)
1158 {
1159 struct v4l2_crop crop;
1160 struct v4l2_cropcap cap;
1161 int ret;
1162
1163 crop.type = V4L2_BUF_TYPE_VIDEO_CAPTURE;
1164
1165 ret = v4l2_subdev_call(sd, video, g_crop, &crop);
1166 if (!ret) {
1167 *rect = crop.c;
1168 return ret;
1169 }
1170
1171 /* Camera driver doesn't support .g_crop(), assume default rectangle */
1172 cap.type = V4L2_BUF_TYPE_VIDEO_CAPTURE;
1173
1174 ret = v4l2_subdev_call(sd, video, cropcap, &cap);
1175 if (!ret)
1176 *rect = cap.defrect;
1177
1178 return ret;
1179 }
1180
1181 /* Client crop has changed, update our sub-rectangle to remain within the area */
1182 static void update_subrect(struct sh_mobile_ceu_cam *cam)
1183 {
1184 struct v4l2_rect *rect = &cam->rect, *subrect = &cam->subrect;
1185
1186 if (rect->width < subrect->width)
1187 subrect->width = rect->width;
1188
1189 if (rect->height < subrect->height)
1190 subrect->height = rect->height;
1191
1192 if (rect->left > subrect->left)
1193 subrect->left = rect->left;
1194 else if (rect->left + rect->width >
1195 subrect->left + subrect->width)
1196 subrect->left = rect->left + rect->width -
1197 subrect->width;
1198
1199 if (rect->top > subrect->top)
1200 subrect->top = rect->top;
1201 else if (rect->top + rect->height >
1202 subrect->top + subrect->height)
1203 subrect->top = rect->top + rect->height -
1204 subrect->height;
1205 }
1206
1207 /*
1208 * The common for both scaling and cropping iterative approach is:
1209 * 1. try if the client can produce exactly what requested by the user
1210 * 2. if (1) failed, try to double the client image until we get one big enough
1211 * 3. if (2) failed, try to request the maximum image
1212 */
1213 static int client_s_crop(struct soc_camera_device *icd, struct v4l2_crop *crop,
1214 struct v4l2_crop *cam_crop)
1215 {
1216 struct v4l2_subdev *sd = soc_camera_to_subdev(icd);
1217 struct v4l2_rect *rect = &crop->c, *cam_rect = &cam_crop->c;
1218 struct device *dev = sd->v4l2_dev->dev;
1219 struct sh_mobile_ceu_cam *cam = icd->host_priv;
1220 struct v4l2_cropcap cap;
1221 int ret;
1222 unsigned int width, height;
1223
1224 v4l2_subdev_call(sd, video, s_crop, crop);
1225 ret = client_g_rect(sd, cam_rect);
1226 if (ret < 0)
1227 return ret;
1228
1229 /*
1230 * Now cam_crop contains the current camera input rectangle, and it must
1231 * be within camera cropcap bounds
1232 */
1233 if (!memcmp(rect, cam_rect, sizeof(*rect))) {
1234 /* Even if camera S_CROP failed, but camera rectangle matches */
1235 dev_dbg(dev, "Camera S_CROP successful for %dx%d@%d:%d\n",
1236 rect->width, rect->height, rect->left, rect->top);
1237 cam->rect = *cam_rect;
1238 return 0;
1239 }
1240
1241 /* Try to fix cropping, that camera hasn't managed to set */
1242 dev_geo(dev, "Fix camera S_CROP for %dx%d@%d:%d to %dx%d@%d:%d\n",
1243 cam_rect->width, cam_rect->height,
1244 cam_rect->left, cam_rect->top,
1245 rect->width, rect->height, rect->left, rect->top);
1246
1247 /* We need sensor maximum rectangle */
1248 ret = v4l2_subdev_call(sd, video, cropcap, &cap);
1249 if (ret < 0)
1250 return ret;
1251
1252 /* Put user requested rectangle within sensor bounds */
1253 soc_camera_limit_side(&rect->left, &rect->width, cap.bounds.left, 2,
1254 cap.bounds.width);
1255 soc_camera_limit_side(&rect->top, &rect->height, cap.bounds.top, 4,
1256 cap.bounds.height);
1257
1258 /*
1259 * Popular special case - some cameras can only handle fixed sizes like
1260 * QVGA, VGA,... Take care to avoid infinite loop.
1261 */
1262 width = max(cam_rect->width, 2);
1263 height = max(cam_rect->height, 2);
1264
1265 /*
1266 * Loop as long as sensor is not covering the requested rectangle and
1267 * is still within its bounds
1268 */
1269 while (!ret && (is_smaller(cam_rect, rect) ||
1270 is_inside(cam_rect, rect)) &&
1271 (cap.bounds.width > width || cap.bounds.height > height)) {
1272
1273 width *= 2;
1274 height *= 2;
1275
1276 cam_rect->width = width;
1277 cam_rect->height = height;
1278
1279 /*
1280 * We do not know what capabilities the camera has to set up
1281 * left and top borders. We could try to be smarter in iterating
1282 * them, e.g., if camera current left is to the right of the
1283 * target left, set it to the middle point between the current
1284 * left and minimum left. But that would add too much
1285 * complexity: we would have to iterate each border separately.
1286 * Instead we just drop to the left and top bounds.
1287 */
1288 if (cam_rect->left > rect->left)
1289 cam_rect->left = cap.bounds.left;
1290
1291 if (cam_rect->left + cam_rect->width < rect->left + rect->width)
1292 cam_rect->width = rect->left + rect->width -
1293 cam_rect->left;
1294
1295 if (cam_rect->top > rect->top)
1296 cam_rect->top = cap.bounds.top;
1297
1298 if (cam_rect->top + cam_rect->height < rect->top + rect->height)
1299 cam_rect->height = rect->top + rect->height -
1300 cam_rect->top;
1301
1302 v4l2_subdev_call(sd, video, s_crop, cam_crop);
1303 ret = client_g_rect(sd, cam_rect);
1304 dev_geo(dev, "Camera S_CROP %d for %dx%d@%d:%d\n", ret,
1305 cam_rect->width, cam_rect->height,
1306 cam_rect->left, cam_rect->top);
1307 }
1308
1309 /* S_CROP must not modify the rectangle */
1310 if (is_smaller(cam_rect, rect) || is_inside(cam_rect, rect)) {
1311 /*
1312 * The camera failed to configure a suitable cropping,
1313 * we cannot use the current rectangle, set to max
1314 */
1315 *cam_rect = cap.bounds;
1316 v4l2_subdev_call(sd, video, s_crop, cam_crop);
1317 ret = client_g_rect(sd, cam_rect);
1318 dev_geo(dev, "Camera S_CROP %d for max %dx%d@%d:%d\n", ret,
1319 cam_rect->width, cam_rect->height,
1320 cam_rect->left, cam_rect->top);
1321 }
1322
1323 if (!ret) {
1324 cam->rect = *cam_rect;
1325 update_subrect(cam);
1326 }
1327
1328 return ret;
1329 }
1330
1331 /* Iterative s_mbus_fmt, also updates cached client crop on success */
1332 static int client_s_fmt(struct soc_camera_device *icd,
1333 struct v4l2_mbus_framefmt *mf, bool ceu_can_scale)
1334 {
1335 struct sh_mobile_ceu_cam *cam = icd->host_priv;
1336 struct v4l2_subdev *sd = soc_camera_to_subdev(icd);
1337 struct device *dev = icd->parent;
1338 unsigned int width = mf->width, height = mf->height, tmp_w, tmp_h;
1339 unsigned int max_width, max_height;
1340 struct v4l2_cropcap cap;
1341 bool ceu_1to1;
1342 int ret;
1343
1344 ret = v4l2_device_call_until_err(sd->v4l2_dev, (long)icd, video,
1345 s_mbus_fmt, mf);
1346 if (ret < 0)
1347 return ret;
1348
1349 dev_geo(dev, "camera scaled to %ux%u\n", mf->width, mf->height);
1350
1351 if (width == mf->width && height == mf->height) {
1352 /* Perfect! The client has done it all. */
1353 ceu_1to1 = true;
1354 goto update_cache;
1355 }
1356
1357 ceu_1to1 = false;
1358 if (!ceu_can_scale)
1359 goto update_cache;
1360
1361 cap.type = V4L2_BUF_TYPE_VIDEO_CAPTURE;
1362
1363 ret = v4l2_subdev_call(sd, video, cropcap, &cap);
1364 if (ret < 0)
1365 return ret;
1366
1367 max_width = min(cap.bounds.width, 2560);
1368 max_height = min(cap.bounds.height, 1920);
1369
1370 /* Camera set a format, but geometry is not precise, try to improve */
1371 tmp_w = mf->width;
1372 tmp_h = mf->height;
1373
1374 /* width <= max_width && height <= max_height - guaranteed by try_fmt */
1375 while ((width > tmp_w || height > tmp_h) &&
1376 tmp_w < max_width && tmp_h < max_height) {
1377 tmp_w = min(2 * tmp_w, max_width);
1378 tmp_h = min(2 * tmp_h, max_height);
1379 mf->width = tmp_w;
1380 mf->height = tmp_h;
1381 ret = v4l2_device_call_until_err(sd->v4l2_dev, (long)icd, video,
1382 s_mbus_fmt, mf);
1383 dev_geo(dev, "Camera scaled to %ux%u\n",
1384 mf->width, mf->height);
1385 if (ret < 0) {
1386 /* This shouldn't happen */
1387 dev_err(dev, "Client failed to set format: %d\n", ret);
1388 return ret;
1389 }
1390 }
1391
1392 update_cache:
1393 /* Update cache */
1394 ret = client_g_rect(sd, &cam->rect);
1395 if (ret < 0)
1396 return ret;
1397
1398 if (ceu_1to1)
1399 cam->subrect = cam->rect;
1400 else
1401 update_subrect(cam);
1402
1403 return 0;
1404 }
1405
1406 /**
1407 * @width - on output: user width, mapped back to input
1408 * @height - on output: user height, mapped back to input
1409 * @mf - in- / output camera output window
1410 */
1411 static int client_scale(struct soc_camera_device *icd,
1412 struct v4l2_mbus_framefmt *mf,
1413 unsigned int *width, unsigned int *height,
1414 bool ceu_can_scale)
1415 {
1416 struct sh_mobile_ceu_cam *cam = icd->host_priv;
1417 struct device *dev = icd->parent;
1418 struct v4l2_mbus_framefmt mf_tmp = *mf;
1419 unsigned int scale_h, scale_v;
1420 int ret;
1421
1422 /*
1423 * 5. Apply iterative camera S_FMT for camera user window (also updates
1424 * client crop cache and the imaginary sub-rectangle).
1425 */
1426 ret = client_s_fmt(icd, &mf_tmp, ceu_can_scale);
1427 if (ret < 0)
1428 return ret;
1429
1430 dev_geo(dev, "5: camera scaled to %ux%u\n",
1431 mf_tmp.width, mf_tmp.height);
1432
1433 /* 6. Retrieve camera output window (g_fmt) */
1434
1435 /* unneeded - it is already in "mf_tmp" */
1436
1437 /* 7. Calculate new client scales. */
1438 scale_h = calc_generic_scale(cam->rect.width, mf_tmp.width);
1439 scale_v = calc_generic_scale(cam->rect.height, mf_tmp.height);
1440
1441 mf->width = mf_tmp.width;
1442 mf->height = mf_tmp.height;
1443 mf->colorspace = mf_tmp.colorspace;
1444
1445 /*
1446 * 8. Calculate new CEU crop - apply camera scales to previously
1447 * updated "effective" crop.
1448 */
1449 *width = scale_down(cam->subrect.width, scale_h);
1450 *height = scale_down(cam->subrect.height, scale_v);
1451
1452 dev_geo(dev, "8: new client sub-window %ux%u\n", *width, *height);
1453
1454 return 0;
1455 }
1456
1457 /*
1458 * CEU can scale and crop, but we don't want to waste bandwidth and kill the
1459 * framerate by always requesting the maximum image from the client. See
1460 * Documentation/video4linux/sh_mobile_ceu_camera.txt for a description of
1461 * scaling and cropping algorithms and for the meaning of referenced here steps.
1462 */
1463 static int sh_mobile_ceu_set_crop(struct soc_camera_device *icd,
1464 struct v4l2_crop *a)
1465 {
1466 struct v4l2_rect *rect = &a->c;
1467 struct device *dev = icd->parent;
1468 struct soc_camera_host *ici = to_soc_camera_host(dev);
1469 struct sh_mobile_ceu_dev *pcdev = ici->priv;
1470 struct v4l2_crop cam_crop;
1471 struct sh_mobile_ceu_cam *cam = icd->host_priv;
1472 struct v4l2_rect *cam_rect = &cam_crop.c;
1473 struct v4l2_subdev *sd = soc_camera_to_subdev(icd);
1474 struct v4l2_mbus_framefmt mf;
1475 unsigned int scale_cam_h, scale_cam_v, scale_ceu_h, scale_ceu_v,
1476 out_width, out_height;
1477 int interm_width, interm_height;
1478 u32 capsr, cflcr;
1479 int ret;
1480
1481 dev_geo(dev, "S_CROP(%ux%u@%u:%u)\n", rect->width, rect->height,
1482 rect->left, rect->top);
1483
1484 /* During camera cropping its output window can change too, stop CEU */
1485 capsr = capture_save_reset(pcdev);
1486 dev_dbg(dev, "CAPSR 0x%x, CFLCR 0x%x\n", capsr, pcdev->cflcr);
1487
1488 /*
1489 * 1. - 2. Apply iterative camera S_CROP for new input window, read back
1490 * actual camera rectangle.
1491 */
1492 ret = client_s_crop(icd, a, &cam_crop);
1493 if (ret < 0)
1494 return ret;
1495
1496 dev_geo(dev, "1-2: camera cropped to %ux%u@%u:%u\n",
1497 cam_rect->width, cam_rect->height,
1498 cam_rect->left, cam_rect->top);
1499
1500 /* On success cam_crop contains current camera crop */
1501
1502 /* 3. Retrieve camera output window */
1503 ret = v4l2_subdev_call(sd, video, g_mbus_fmt, &mf);
1504 if (ret < 0)
1505 return ret;
1506
1507 if (mf.width > 2560 || mf.height > 1920)
1508 return -EINVAL;
1509
1510 /* 4. Calculate camera scales */
1511 scale_cam_h = calc_generic_scale(cam_rect->width, mf.width);
1512 scale_cam_v = calc_generic_scale(cam_rect->height, mf.height);
1513
1514 /* Calculate intermediate window */
1515 interm_width = scale_down(rect->width, scale_cam_h);
1516 interm_height = scale_down(rect->height, scale_cam_v);
1517
1518 if (interm_width < icd->user_width) {
1519 u32 new_scale_h;
1520
1521 new_scale_h = calc_generic_scale(rect->width, icd->user_width);
1522
1523 mf.width = scale_down(cam_rect->width, new_scale_h);
1524 }
1525
1526 if (interm_height < icd->user_height) {
1527 u32 new_scale_v;
1528
1529 new_scale_v = calc_generic_scale(rect->height, icd->user_height);
1530
1531 mf.height = scale_down(cam_rect->height, new_scale_v);
1532 }
1533
1534 if (interm_width < icd->user_width || interm_height < icd->user_height) {
1535 ret = v4l2_device_call_until_err(sd->v4l2_dev, (int)icd, video,
1536 s_mbus_fmt, &mf);
1537 if (ret < 0)
1538 return ret;
1539
1540 dev_geo(dev, "New camera output %ux%u\n", mf.width, mf.height);
1541 scale_cam_h = calc_generic_scale(cam_rect->width, mf.width);
1542 scale_cam_v = calc_generic_scale(cam_rect->height, mf.height);
1543 interm_width = scale_down(rect->width, scale_cam_h);
1544 interm_height = scale_down(rect->height, scale_cam_v);
1545 }
1546
1547 /* Cache camera output window */
1548 cam->width = mf.width;
1549 cam->height = mf.height;
1550
1551 if (pcdev->image_mode) {
1552 out_width = min(interm_width, icd->user_width);
1553 out_height = min(interm_height, icd->user_height);
1554 } else {
1555 out_width = interm_width;
1556 out_height = interm_height;
1557 }
1558
1559 /*
1560 * 5. Calculate CEU scales from camera scales from results of (5) and
1561 * the user window
1562 */
1563 scale_ceu_h = calc_scale(interm_width, &out_width);
1564 scale_ceu_v = calc_scale(interm_height, &out_height);
1565
1566 dev_geo(dev, "5: CEU scales %u:%u\n", scale_ceu_h, scale_ceu_v);
1567
1568 /* Apply CEU scales. */
1569 cflcr = scale_ceu_h | (scale_ceu_v << 16);
1570 if (cflcr != pcdev->cflcr) {
1571 pcdev->cflcr = cflcr;
1572 ceu_write(pcdev, CFLCR, cflcr);
1573 }
1574
1575 icd->user_width = out_width & ~3;
1576 icd->user_height = out_height & ~3;
1577 /* Offsets are applied at the CEU scaling filter input */
1578 cam->ceu_left = scale_down(rect->left - cam_rect->left, scale_cam_h) & ~1;
1579 cam->ceu_top = scale_down(rect->top - cam_rect->top, scale_cam_v) & ~1;
1580
1581 /* 6. Use CEU cropping to crop to the new window. */
1582 sh_mobile_ceu_set_rect(icd);
1583
1584 cam->subrect = *rect;
1585
1586 dev_geo(dev, "6: CEU cropped to %ux%u@%u:%u\n",
1587 icd->user_width, icd->user_height,
1588 cam->ceu_left, cam->ceu_top);
1589
1590 /* Restore capture. The CE bit can be cleared by the hardware */
1591 if (pcdev->active)
1592 capsr |= 1;
1593 capture_restore(pcdev, capsr);
1594
1595 /* Even if only camera cropping succeeded */
1596 return ret;
1597 }
1598
1599 static int sh_mobile_ceu_get_crop(struct soc_camera_device *icd,
1600 struct v4l2_crop *a)
1601 {
1602 struct sh_mobile_ceu_cam *cam = icd->host_priv;
1603
1604 a->type = V4L2_BUF_TYPE_VIDEO_CAPTURE;
1605 a->c = cam->subrect;
1606
1607 return 0;
1608 }
1609
1610 /*
1611 * Calculate real client output window by applying new scales to the current
1612 * client crop. New scales are calculated from the requested output format and
1613 * CEU crop, mapped backed onto the client input (subrect).
1614 */
1615 static void calculate_client_output(struct soc_camera_device *icd,
1616 const struct v4l2_pix_format *pix, struct v4l2_mbus_framefmt *mf)
1617 {
1618 struct sh_mobile_ceu_cam *cam = icd->host_priv;
1619 struct device *dev = icd->parent;
1620 struct v4l2_rect *cam_subrect = &cam->subrect;
1621 unsigned int scale_v, scale_h;
1622
1623 if (cam_subrect->width == cam->rect.width &&
1624 cam_subrect->height == cam->rect.height) {
1625 /* No sub-cropping */
1626 mf->width = pix->width;
1627 mf->height = pix->height;
1628 return;
1629 }
1630
1631 /* 1.-2. Current camera scales and subwin - cached. */
1632
1633 dev_geo(dev, "2: subwin %ux%u@%u:%u\n",
1634 cam_subrect->width, cam_subrect->height,
1635 cam_subrect->left, cam_subrect->top);
1636
1637 /*
1638 * 3. Calculate new combined scales from input sub-window to requested
1639 * user window.
1640 */
1641
1642 /*
1643 * TODO: CEU cannot scale images larger than VGA to smaller than SubQCIF
1644 * (128x96) or larger than VGA
1645 */
1646 scale_h = calc_generic_scale(cam_subrect->width, pix->width);
1647 scale_v = calc_generic_scale(cam_subrect->height, pix->height);
1648
1649 dev_geo(dev, "3: scales %u:%u\n", scale_h, scale_v);
1650
1651 /*
1652 * 4. Calculate desired client output window by applying combined scales
1653 * to client (real) input window.
1654 */
1655 mf->width = scale_down(cam->rect.width, scale_h);
1656 mf->height = scale_down(cam->rect.height, scale_v);
1657 }
1658
1659 /* Similar to set_crop multistage iterative algorithm */
1660 static int sh_mobile_ceu_set_fmt(struct soc_camera_device *icd,
1661 struct v4l2_format *f)
1662 {
1663 struct device *dev = icd->parent;
1664 struct soc_camera_host *ici = to_soc_camera_host(dev);
1665 struct sh_mobile_ceu_dev *pcdev = ici->priv;
1666 struct sh_mobile_ceu_cam *cam = icd->host_priv;
1667 struct v4l2_pix_format *pix = &f->fmt.pix;
1668 struct v4l2_mbus_framefmt mf;
1669 __u32 pixfmt = pix->pixelformat;
1670 const struct soc_camera_format_xlate *xlate;
1671 /* Keep Compiler Happy */
1672 unsigned int ceu_sub_width = 0, ceu_sub_height = 0;
1673 u16 scale_v, scale_h;
1674 int ret;
1675 bool image_mode;
1676 enum v4l2_field field;
1677
1678 switch (pix->field) {
1679 default:
1680 pix->field = V4L2_FIELD_NONE;
1681 /* fall-through */
1682 case V4L2_FIELD_INTERLACED_TB:
1683 case V4L2_FIELD_INTERLACED_BT:
1684 case V4L2_FIELD_NONE:
1685 field = pix->field;
1686 break;
1687 case V4L2_FIELD_INTERLACED:
1688 field = V4L2_FIELD_INTERLACED_TB;
1689 break;
1690 }
1691
1692 xlate = soc_camera_xlate_by_fourcc(icd, pixfmt);
1693 if (!xlate) {
1694 dev_warn(dev, "Format %x not found\n", pixfmt);
1695 return -EINVAL;
1696 }
1697
1698 /* 1.-4. Calculate desired client output geometry */
1699 calculate_client_output(icd, pix, &mf);
1700 mf.field = pix->field;
1701 mf.colorspace = pix->colorspace;
1702 mf.code = xlate->code;
1703
1704 switch (pixfmt) {
1705 case V4L2_PIX_FMT_NV12:
1706 case V4L2_PIX_FMT_NV21:
1707 case V4L2_PIX_FMT_NV16:
1708 case V4L2_PIX_FMT_NV61:
1709 image_mode = true;
1710 break;
1711 default:
1712 image_mode = false;
1713 }
1714
1715 dev_info(dev, "S_FMT(pix=0x%x, fld 0x%x, code 0x%x, %ux%u)\n", pixfmt, mf.field, mf.code,
1716 pix->width, pix->height);
1717
1718 dev_geo(dev, "4: request camera output %ux%u\n", mf.width, mf.height);
1719
1720 /* 5. - 9. */
1721 ret = client_scale(icd, &mf, &ceu_sub_width, &ceu_sub_height,
1722 image_mode && V4L2_FIELD_NONE == field);
1723
1724 dev_geo(dev, "5-9: client scale return %d\n", ret);
1725
1726 /* Done with the camera. Now see if we can improve the result */
1727
1728 dev_geo(dev, "fmt %ux%u, requested %ux%u\n",
1729 mf.width, mf.height, pix->width, pix->height);
1730 if (ret < 0)
1731 return ret;
1732
1733 if (mf.code != xlate->code)
1734 return -EINVAL;
1735
1736 /* 9. Prepare CEU crop */
1737 cam->width = mf.width;
1738 cam->height = mf.height;
1739
1740 /* 10. Use CEU scaling to scale to the requested user window. */
1741
1742 /* We cannot scale up */
1743 if (pix->width > ceu_sub_width)
1744 ceu_sub_width = pix->width;
1745
1746 if (pix->height > ceu_sub_height)
1747 ceu_sub_height = pix->height;
1748
1749 pix->colorspace = mf.colorspace;
1750
1751 if (image_mode) {
1752 /* Scale pix->{width x height} down to width x height */
1753 scale_h = calc_scale(ceu_sub_width, &pix->width);
1754 scale_v = calc_scale(ceu_sub_height, &pix->height);
1755 } else {
1756 pix->width = ceu_sub_width;
1757 pix->height = ceu_sub_height;
1758 scale_h = 0;
1759 scale_v = 0;
1760 }
1761
1762 pcdev->cflcr = scale_h | (scale_v << 16);
1763
1764 /*
1765 * We have calculated CFLCR, the actual configuration will be performed
1766 * in sh_mobile_ceu_set_bus_param()
1767 */
1768
1769 dev_geo(dev, "10: W: %u : 0x%x = %u, H: %u : 0x%x = %u\n",
1770 ceu_sub_width, scale_h, pix->width,
1771 ceu_sub_height, scale_v, pix->height);
1772
1773 cam->code = xlate->code;
1774 icd->current_fmt = xlate;
1775
1776 pcdev->field = field;
1777 pcdev->image_mode = image_mode;
1778
1779 /* CFSZR requirement */
1780 pix->width &= ~3;
1781 pix->height &= ~3;
1782
1783 return 0;
1784 }
1785
1786 static int sh_mobile_ceu_try_fmt(struct soc_camera_device *icd,
1787 struct v4l2_format *f)
1788 {
1789 const struct soc_camera_format_xlate *xlate;
1790 struct v4l2_pix_format *pix = &f->fmt.pix;
1791 struct v4l2_subdev *sd = soc_camera_to_subdev(icd);
1792 struct v4l2_mbus_framefmt mf;
1793 __u32 pixfmt = pix->pixelformat;
1794 int width, height;
1795 int ret;
1796
1797 dev_geo(icd->parent, "TRY_FMT(pix=0x%x, %ux%u)\n",
1798 pixfmt, pix->width, pix->height);
1799
1800 xlate = soc_camera_xlate_by_fourcc(icd, pixfmt);
1801 if (!xlate) {
1802 dev_warn(icd->parent, "Format %x not found\n", pixfmt);
1803 return -EINVAL;
1804 }
1805
1806 /* FIXME: calculate using depth and bus width */
1807
1808 /* CFSZR requires height and width to be 4-pixel aligned */
1809 v4l_bound_align_image(&pix->width, 2, 2560, 2,
1810 &pix->height, 4, 1920, 2, 0);
1811
1812 width = pix->width;
1813 height = pix->height;
1814
1815 /* limit to sensor capabilities */
1816 mf.width = pix->width;
1817 mf.height = pix->height;
1818 mf.field = pix->field;
1819 mf.code = xlate->code;
1820 mf.colorspace = pix->colorspace;
1821
1822 ret = v4l2_device_call_until_err(sd->v4l2_dev, (long)icd, video, try_mbus_fmt, &mf);
1823 if (ret < 0)
1824 return ret;
1825
1826 pix->width = mf.width;
1827 pix->height = mf.height;
1828 pix->field = mf.field;
1829 pix->colorspace = mf.colorspace;
1830
1831 switch (pixfmt) {
1832 case V4L2_PIX_FMT_NV12:
1833 case V4L2_PIX_FMT_NV21:
1834 case V4L2_PIX_FMT_NV16:
1835 case V4L2_PIX_FMT_NV61:
1836 /* FIXME: check against rect_max after converting soc-camera */
1837 /* We can scale precisely, need a bigger image from camera */
1838 if (pix->width < width || pix->height < height) {
1839 /*
1840 * We presume, the sensor behaves sanely, i.e., if
1841 * requested a bigger rectangle, it will not return a
1842 * smaller one.
1843 */
1844 mf.width = 2560;
1845 mf.height = 1920;
1846 ret = v4l2_device_call_until_err(sd->v4l2_dev, (long)icd, video,
1847 try_mbus_fmt, &mf);
1848 if (ret < 0) {
1849 /* Shouldn't actually happen... */
1850 dev_err(icd->parent,
1851 "FIXME: client try_fmt() = %d\n", ret);
1852 return ret;
1853 }
1854 }
1855 /* We will scale exactly */
1856 if (mf.width > width)
1857 pix->width = width;
1858 if (mf.height > height)
1859 pix->height = height;
1860 }
1861
1862 pix->width &= ~3;
1863 pix->height &= ~3;
1864
1865 dev_geo(icd->parent, "%s(): return %d, fmt 0x%x, %ux%u\n",
1866 __func__, ret, pix->pixelformat, pix->width, pix->height);
1867
1868 return ret;
1869 }
1870
1871 static int sh_mobile_ceu_set_livecrop(struct soc_camera_device *icd,
1872 struct v4l2_crop *a)
1873 {
1874 struct v4l2_subdev *sd = soc_camera_to_subdev(icd);
1875 struct soc_camera_host *ici = to_soc_camera_host(icd->parent);
1876 struct sh_mobile_ceu_dev *pcdev = ici->priv;
1877 u32 out_width = icd->user_width, out_height = icd->user_height;
1878 int ret;
1879
1880 /* Freeze queue */
1881 pcdev->frozen = 1;
1882 /* Wait for frame */
1883 ret = wait_for_completion_interruptible(&pcdev->complete);
1884 /* Stop the client */
1885 ret = v4l2_subdev_call(sd, video, s_stream, 0);
1886 if (ret < 0)
1887 dev_warn(icd->parent,
1888 "Client failed to stop the stream: %d\n", ret);
1889 else
1890 /* Do the crop, if it fails, there's nothing more we can do */
1891 sh_mobile_ceu_set_crop(icd, a);
1892
1893 dev_geo(icd->parent, "Output after crop: %ux%u\n", icd->user_width, icd->user_height);
1894
1895 if (icd->user_width != out_width || icd->user_height != out_height) {
1896 struct v4l2_format f = {
1897 .type = V4L2_BUF_TYPE_VIDEO_CAPTURE,
1898 .fmt.pix = {
1899 .width = out_width,
1900 .height = out_height,
1901 .pixelformat = icd->current_fmt->host_fmt->fourcc,
1902 .field = pcdev->field,
1903 .colorspace = icd->colorspace,
1904 },
1905 };
1906 ret = sh_mobile_ceu_set_fmt(icd, &f);
1907 if (!ret && (out_width != f.fmt.pix.width ||
1908 out_height != f.fmt.pix.height))
1909 ret = -EINVAL;
1910 if (!ret) {
1911 icd->user_width = out_width & ~3;
1912 icd->user_height = out_height & ~3;
1913 ret = sh_mobile_ceu_set_bus_param(icd,
1914 icd->current_fmt->host_fmt->fourcc);
1915 }
1916 }
1917
1918 /* Thaw the queue */
1919 pcdev->frozen = 0;
1920 spin_lock_irq(&pcdev->lock);
1921 sh_mobile_ceu_capture(pcdev);
1922 spin_unlock_irq(&pcdev->lock);
1923 /* Start the client */
1924 ret = v4l2_subdev_call(sd, video, s_stream, 1);
1925 return ret;
1926 }
1927
1928 static unsigned int sh_mobile_ceu_poll(struct file *file, poll_table *pt)
1929 {
1930 struct soc_camera_device *icd = file->private_data;
1931
1932 return vb2_poll(&icd->vb2_vidq, file, pt);
1933 }
1934
1935 static int sh_mobile_ceu_querycap(struct soc_camera_host *ici,
1936 struct v4l2_capability *cap)
1937 {
1938 strlcpy(cap->card, "SuperH_Mobile_CEU", sizeof(cap->card));
1939 cap->capabilities = V4L2_CAP_VIDEO_CAPTURE | V4L2_CAP_STREAMING;
1940 return 0;
1941 }
1942
1943 static int sh_mobile_ceu_init_videobuf(struct vb2_queue *q,
1944 struct soc_camera_device *icd)
1945 {
1946 q->type = V4L2_BUF_TYPE_VIDEO_CAPTURE;
1947 q->io_modes = VB2_MMAP | VB2_USERPTR;
1948 q->drv_priv = icd;
1949 q->ops = &sh_mobile_ceu_videobuf_ops;
1950 q->mem_ops = &vb2_dma_contig_memops;
1951 q->buf_struct_size = sizeof(struct sh_mobile_ceu_buffer);
1952
1953 return vb2_queue_init(q);
1954 }
1955
1956 static struct soc_camera_host_ops sh_mobile_ceu_host_ops = {
1957 .owner = THIS_MODULE,
1958 .add = sh_mobile_ceu_add_device,
1959 .remove = sh_mobile_ceu_remove_device,
1960 .get_formats = sh_mobile_ceu_get_formats,
1961 .put_formats = sh_mobile_ceu_put_formats,
1962 .get_crop = sh_mobile_ceu_get_crop,
1963 .set_crop = sh_mobile_ceu_set_crop,
1964 .set_livecrop = sh_mobile_ceu_set_livecrop,
1965 .set_fmt = sh_mobile_ceu_set_fmt,
1966 .try_fmt = sh_mobile_ceu_try_fmt,
1967 .poll = sh_mobile_ceu_poll,
1968 .querycap = sh_mobile_ceu_querycap,
1969 .set_bus_param = sh_mobile_ceu_set_bus_param,
1970 .init_videobuf2 = sh_mobile_ceu_init_videobuf,
1971 };
1972
1973 struct bus_wait {
1974 struct notifier_block notifier;
1975 struct completion completion;
1976 struct device *dev;
1977 };
1978
1979 static int bus_notify(struct notifier_block *nb,
1980 unsigned long action, void *data)
1981 {
1982 struct device *dev = data;
1983 struct bus_wait *wait = container_of(nb, struct bus_wait, notifier);
1984
1985 if (wait->dev != dev)
1986 return NOTIFY_DONE;
1987
1988 switch (action) {
1989 case BUS_NOTIFY_UNBOUND_DRIVER:
1990 /* Protect from module unloading */
1991 wait_for_completion(&wait->completion);
1992 return NOTIFY_OK;
1993 }
1994 return NOTIFY_DONE;
1995 }
1996
1997 static int __devinit sh_mobile_ceu_probe(struct platform_device *pdev)
1998 {
1999 struct sh_mobile_ceu_dev *pcdev;
2000 struct resource *res;
2001 void __iomem *base;
2002 unsigned int irq;
2003 int err = 0;
2004 struct bus_wait wait = {
2005 .completion = COMPLETION_INITIALIZER_ONSTACK(wait.completion),
2006 .notifier.notifier_call = bus_notify,
2007 };
2008 struct sh_mobile_ceu_companion *csi2;
2009
2010 res = platform_get_resource(pdev, IORESOURCE_MEM, 0);
2011 irq = platform_get_irq(pdev, 0);
2012 if (!res || (int)irq <= 0) {
2013 dev_err(&pdev->dev, "Not enough CEU platform resources.\n");
2014 err = -ENODEV;
2015 goto exit;
2016 }
2017
2018 pcdev = kzalloc(sizeof(*pcdev), GFP_KERNEL);
2019 if (!pcdev) {
2020 dev_err(&pdev->dev, "Could not allocate pcdev\n");
2021 err = -ENOMEM;
2022 goto exit;
2023 }
2024
2025 INIT_LIST_HEAD(&pcdev->capture);
2026 spin_lock_init(&pcdev->lock);
2027 init_completion(&pcdev->complete);
2028
2029 pcdev->pdata = pdev->dev.platform_data;
2030 if (!pcdev->pdata) {
2031 err = -EINVAL;
2032 dev_err(&pdev->dev, "CEU platform data not set.\n");
2033 goto exit_kfree;
2034 }
2035
2036 base = ioremap_nocache(res->start, resource_size(res));
2037 if (!base) {
2038 err = -ENXIO;
2039 dev_err(&pdev->dev, "Unable to ioremap CEU registers.\n");
2040 goto exit_kfree;
2041 }
2042
2043 pcdev->irq = irq;
2044 pcdev->base = base;
2045 pcdev->video_limit = 0; /* only enabled if second resource exists */
2046
2047 res = platform_get_resource(pdev, IORESOURCE_MEM, 1);
2048 if (res) {
2049 err = dma_declare_coherent_memory(&pdev->dev, res->start,
2050 res->start,
2051 resource_size(res),
2052 DMA_MEMORY_MAP |
2053 DMA_MEMORY_EXCLUSIVE);
2054 if (!err) {
2055 dev_err(&pdev->dev, "Unable to declare CEU memory.\n");
2056 err = -ENXIO;
2057 goto exit_iounmap;
2058 }
2059
2060 pcdev->video_limit = resource_size(res);
2061 }
2062
2063 /* request irq */
2064 err = request_irq(pcdev->irq, sh_mobile_ceu_irq, IRQF_DISABLED,
2065 dev_name(&pdev->dev), pcdev);
2066 if (err) {
2067 dev_err(&pdev->dev, "Unable to register CEU interrupt.\n");
2068 goto exit_release_mem;
2069 }
2070
2071 pm_suspend_ignore_children(&pdev->dev, true);
2072 pm_runtime_enable(&pdev->dev);
2073 pm_runtime_resume(&pdev->dev);
2074
2075 pcdev->ici.priv = pcdev;
2076 pcdev->ici.v4l2_dev.dev = &pdev->dev;
2077 pcdev->ici.nr = pdev->id;
2078 pcdev->ici.drv_name = dev_name(&pdev->dev);
2079 pcdev->ici.ops = &sh_mobile_ceu_host_ops;
2080
2081 pcdev->alloc_ctx = vb2_dma_contig_init_ctx(&pdev->dev);
2082 if (IS_ERR(pcdev->alloc_ctx)) {
2083 err = PTR_ERR(pcdev->alloc_ctx);
2084 goto exit_free_clk;
2085 }
2086
2087 err = soc_camera_host_register(&pcdev->ici);
2088 if (err)
2089 goto exit_free_ctx;
2090
2091 /* CSI2 interfacing */
2092 csi2 = pcdev->pdata->csi2;
2093 if (csi2) {
2094 struct platform_device *csi2_pdev =
2095 platform_device_alloc("sh-mobile-csi2", csi2->id);
2096 struct sh_csi2_pdata *csi2_pdata = csi2->platform_data;
2097
2098 if (!csi2_pdev) {
2099 err = -ENOMEM;
2100 goto exit_host_unregister;
2101 }
2102
2103 pcdev->csi2_pdev = csi2_pdev;
2104
2105 err = platform_device_add_data(csi2_pdev, csi2_pdata, sizeof(*csi2_pdata));
2106 if (err < 0)
2107 goto exit_pdev_put;
2108
2109 csi2_pdata = csi2_pdev->dev.platform_data;
2110 csi2_pdata->v4l2_dev = &pcdev->ici.v4l2_dev;
2111
2112 csi2_pdev->resource = csi2->resource;
2113 csi2_pdev->num_resources = csi2->num_resources;
2114
2115 err = platform_device_add(csi2_pdev);
2116 if (err < 0)
2117 goto exit_pdev_put;
2118
2119 wait.dev = &csi2_pdev->dev;
2120
2121 err = bus_register_notifier(&platform_bus_type, &wait.notifier);
2122 if (err < 0)
2123 goto exit_pdev_unregister;
2124
2125 /*
2126 * From this point the driver module will not unload, until
2127 * we complete the completion.
2128 */
2129
2130 if (!csi2_pdev->dev.driver) {
2131 complete(&wait.completion);
2132 /* Either too late, or probing failed */
2133 bus_unregister_notifier(&platform_bus_type, &wait.notifier);
2134 err = -ENXIO;
2135 goto exit_pdev_unregister;
2136 }
2137
2138 /*
2139 * The module is still loaded, in the worst case it is hanging
2140 * in device release on our completion. So, _now_ dereferencing
2141 * the "owner" is safe!
2142 */
2143
2144 err = try_module_get(csi2_pdev->dev.driver->owner);
2145
2146 /* Let notifier complete, if it has been locked */
2147 complete(&wait.completion);
2148 bus_unregister_notifier(&platform_bus_type, &wait.notifier);
2149 if (!err) {
2150 err = -ENODEV;
2151 goto exit_pdev_unregister;
2152 }
2153 }
2154
2155 return 0;
2156
2157 exit_pdev_unregister:
2158 platform_device_del(pcdev->csi2_pdev);
2159 exit_pdev_put:
2160 pcdev->csi2_pdev->resource = NULL;
2161 platform_device_put(pcdev->csi2_pdev);
2162 exit_host_unregister:
2163 soc_camera_host_unregister(&pcdev->ici);
2164 exit_free_ctx:
2165 vb2_dma_contig_cleanup_ctx(pcdev->alloc_ctx);
2166 exit_free_clk:
2167 pm_runtime_disable(&pdev->dev);
2168 free_irq(pcdev->irq, pcdev);
2169 exit_release_mem:
2170 if (platform_get_resource(pdev, IORESOURCE_MEM, 1))
2171 dma_release_declared_memory(&pdev->dev);
2172 exit_iounmap:
2173 iounmap(base);
2174 exit_kfree:
2175 kfree(pcdev);
2176 exit:
2177 return err;
2178 }
2179
2180 static int __devexit sh_mobile_ceu_remove(struct platform_device *pdev)
2181 {
2182 struct soc_camera_host *soc_host = to_soc_camera_host(&pdev->dev);
2183 struct sh_mobile_ceu_dev *pcdev = container_of(soc_host,
2184 struct sh_mobile_ceu_dev, ici);
2185 struct platform_device *csi2_pdev = pcdev->csi2_pdev;
2186
2187 soc_camera_host_unregister(soc_host);
2188 pm_runtime_disable(&pdev->dev);
2189 free_irq(pcdev->irq, pcdev);
2190 if (platform_get_resource(pdev, IORESOURCE_MEM, 1))
2191 dma_release_declared_memory(&pdev->dev);
2192 iounmap(pcdev->base);
2193 vb2_dma_contig_cleanup_ctx(pcdev->alloc_ctx);
2194 if (csi2_pdev && csi2_pdev->dev.driver) {
2195 struct module *csi2_drv = csi2_pdev->dev.driver->owner;
2196 platform_device_del(csi2_pdev);
2197 csi2_pdev->resource = NULL;
2198 platform_device_put(csi2_pdev);
2199 module_put(csi2_drv);
2200 }
2201 kfree(pcdev);
2202
2203 return 0;
2204 }
2205
2206 static int sh_mobile_ceu_runtime_nop(struct device *dev)
2207 {
2208 /* Runtime PM callback shared between ->runtime_suspend()
2209 * and ->runtime_resume(). Simply returns success.
2210 *
2211 * This driver re-initializes all registers after
2212 * pm_runtime_get_sync() anyway so there is no need
2213 * to save and restore registers here.
2214 */
2215 return 0;
2216 }
2217
2218 static const struct dev_pm_ops sh_mobile_ceu_dev_pm_ops = {
2219 .runtime_suspend = sh_mobile_ceu_runtime_nop,
2220 .runtime_resume = sh_mobile_ceu_runtime_nop,
2221 };
2222
2223 static struct platform_driver sh_mobile_ceu_driver = {
2224 .driver = {
2225 .name = "sh_mobile_ceu",
2226 .pm = &sh_mobile_ceu_dev_pm_ops,
2227 },
2228 .probe = sh_mobile_ceu_probe,
2229 .remove = __devexit_p(sh_mobile_ceu_remove),
2230 };
2231
2232 static int __init sh_mobile_ceu_init(void)
2233 {
2234 /* Whatever return code */
2235 request_module("sh_mobile_csi2");
2236 return platform_driver_register(&sh_mobile_ceu_driver);
2237 }
2238
2239 static void __exit sh_mobile_ceu_exit(void)
2240 {
2241 platform_driver_unregister(&sh_mobile_ceu_driver);
2242 }
2243
2244 module_init(sh_mobile_ceu_init);
2245 module_exit(sh_mobile_ceu_exit);
2246
2247 MODULE_DESCRIPTION("SuperH Mobile CEU driver");
2248 MODULE_AUTHOR("Magnus Damm");
2249 MODULE_LICENSE("GPL");
2250 MODULE_VERSION("0.0.6");
2251 MODULE_ALIAS("platform:sh_mobile_ceu");
Linux kernel - Deliverables
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