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Merge branch 'integrity-check-patch-v2' of git://btrfs.giantdisaster.de/git/btrfs...
[linux-2.6/linux-acpi-2.6/ibm-acpi-2.6.git] / drivers / media / video / sh_mobile_ceu_camera.c
blobc51decfcae197cedb83f6d68169cc0a6251f621d
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 };
94
95 struct sh_mobile_ceu_dev {
96 struct soc_camera_host ici;
97 struct soc_camera_device *icd;
98 struct platform_device *csi2_pdev;
99
100 unsigned int irq;
101 void __iomem *base;
102 size_t video_limit;
103 size_t buf_total;
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
196 /*
197 * .queue_setup() is called to check, whether the driver can accept the
198 * requested number of buffers and to fill in plane sizes
199 * for the current frame format if required
200 */
201 static int sh_mobile_ceu_videobuf_setup(struct vb2_queue *vq,
202 const struct v4l2_format *fmt,
203 unsigned int *count, unsigned int *num_planes,
204 unsigned int sizes[], void *alloc_ctxs[])
205 {
206 struct soc_camera_device *icd = container_of(vq, struct soc_camera_device, vb2_vidq);
207 struct soc_camera_host *ici = to_soc_camera_host(icd->parent);
208 struct sh_mobile_ceu_dev *pcdev = ici->priv;
209 int bytes_per_line;
210 unsigned int height;
211
212 if (fmt) {
213 const struct soc_camera_format_xlate *xlate = soc_camera_xlate_by_fourcc(icd,
214 fmt->fmt.pix.pixelformat);
215 if (!xlate)
216 return -EINVAL;
217 bytes_per_line = soc_mbus_bytes_per_line(fmt->fmt.pix.width,
218 xlate->host_fmt);
219 height = fmt->fmt.pix.height;
220 } else {
221 /* Called from VIDIOC_REQBUFS or in compatibility mode */
222 bytes_per_line = soc_mbus_bytes_per_line(icd->user_width,
223 icd->current_fmt->host_fmt);
224 height = icd->user_height;
225 }
226 if (bytes_per_line < 0)
227 return bytes_per_line;
228
229 sizes[0] = bytes_per_line * height;
230
231 alloc_ctxs[0] = pcdev->alloc_ctx;
232
233 if (!vq->num_buffers)
234 pcdev->sequence = 0;
235
236 if (!*count)
237 *count = 2;
238
239 /* If *num_planes != 0, we have already verified *count. */
240 if (pcdev->video_limit && !*num_planes) {
241 size_t size = PAGE_ALIGN(sizes[0]) * *count;
242
243 if (size + pcdev->buf_total > pcdev->video_limit)
244 *count = (pcdev->video_limit - pcdev->buf_total) /
245 PAGE_ALIGN(sizes[0]);
246 }
247
248 *num_planes = 1;
249
250 dev_dbg(icd->parent, "count=%d, size=%u\n", *count, sizes[0]);
251
252 return 0;
253 }
254
255 #define CEU_CETCR_MAGIC 0x0317f313 /* acknowledge magical interrupt sources */
256 #define CEU_CETCR_IGRW (1 << 4) /* prohibited register access interrupt bit */
257 #define CEU_CEIER_CPEIE (1 << 0) /* one-frame capture end interrupt */
258 #define CEU_CEIER_VBP (1 << 20) /* vbp error */
259 #define CEU_CAPCR_CTNCP (1 << 16) /* continuous capture mode (if set) */
260 #define CEU_CEIER_MASK (CEU_CEIER_CPEIE | CEU_CEIER_VBP)
261
262
263 /*
264 * return value doesn't reflex the success/failure to queue the new buffer,
265 * but rather the status of the previous buffer.
266 */
267 static int sh_mobile_ceu_capture(struct sh_mobile_ceu_dev *pcdev)
268 {
269 struct soc_camera_device *icd = pcdev->icd;
270 dma_addr_t phys_addr_top, phys_addr_bottom;
271 unsigned long top1, top2;
272 unsigned long bottom1, bottom2;
273 u32 status;
274 bool planar;
275 int ret = 0;
276
277 /*
278 * The hardware is _very_ picky about this sequence. Especially
279 * the CEU_CETCR_MAGIC value. It seems like we need to acknowledge
280 * several not-so-well documented interrupt sources in CETCR.
281 */
282 ceu_write(pcdev, CEIER, ceu_read(pcdev, CEIER) & ~CEU_CEIER_MASK);
283 status = ceu_read(pcdev, CETCR);
284 ceu_write(pcdev, CETCR, ~status & CEU_CETCR_MAGIC);
285 if (!pcdev->frozen)
286 ceu_write(pcdev, CEIER, ceu_read(pcdev, CEIER) | CEU_CEIER_MASK);
287 ceu_write(pcdev, CAPCR, ceu_read(pcdev, CAPCR) & ~CEU_CAPCR_CTNCP);
288 ceu_write(pcdev, CETCR, CEU_CETCR_MAGIC ^ CEU_CETCR_IGRW);
289
290 /*
291 * When a VBP interrupt occurs, a capture end interrupt does not occur
292 * and the image of that frame is not captured correctly. So, soft reset
293 * is needed here.
294 */
295 if (status & CEU_CEIER_VBP) {
296 sh_mobile_ceu_soft_reset(pcdev);
297 ret = -EIO;
298 }
299
300 if (pcdev->frozen) {
301 complete(&pcdev->complete);
302 return ret;
303 }
304
305 if (!pcdev->active)
306 return ret;
307
308 if (V4L2_FIELD_INTERLACED_BT == pcdev->field) {
309 top1 = CDBYR;
310 top2 = CDBCR;
311 bottom1 = CDAYR;
312 bottom2 = CDACR;
313 } else {
314 top1 = CDAYR;
315 top2 = CDACR;
316 bottom1 = CDBYR;
317 bottom2 = CDBCR;
318 }
319
320 phys_addr_top = vb2_dma_contig_plane_dma_addr(pcdev->active, 0);
321
322 switch (icd->current_fmt->host_fmt->fourcc) {
323 case V4L2_PIX_FMT_NV12:
324 case V4L2_PIX_FMT_NV21:
325 case V4L2_PIX_FMT_NV16:
326 case V4L2_PIX_FMT_NV61:
327 planar = true;
328 break;
329 default:
330 planar = false;
331 }
332
333 ceu_write(pcdev, top1, phys_addr_top);
334 if (V4L2_FIELD_NONE != pcdev->field) {
335 if (planar)
336 phys_addr_bottom = phys_addr_top + icd->user_width;
337 else
338 phys_addr_bottom = phys_addr_top +
339 soc_mbus_bytes_per_line(icd->user_width,
340 icd->current_fmt->host_fmt);
341 ceu_write(pcdev, bottom1, phys_addr_bottom);
342 }
343
344 if (planar) {
345 phys_addr_top += icd->user_width *
346 icd->user_height;
347 ceu_write(pcdev, top2, phys_addr_top);
348 if (V4L2_FIELD_NONE != pcdev->field) {
349 phys_addr_bottom = phys_addr_top + icd->user_width;
350 ceu_write(pcdev, bottom2, phys_addr_bottom);
351 }
352 }
353
354 ceu_write(pcdev, CAPSR, 0x1); /* start capture */
355
356 return ret;
357 }
358
359 static int sh_mobile_ceu_videobuf_prepare(struct vb2_buffer *vb)
360 {
361 struct sh_mobile_ceu_buffer *buf = to_ceu_vb(vb);
362
363 /* Added list head initialization on alloc */
364 WARN(!list_empty(&buf->queue), "Buffer %p on queue!\n", vb);
365
366 return 0;
367 }
368
369 static void sh_mobile_ceu_videobuf_queue(struct vb2_buffer *vb)
370 {
371 struct soc_camera_device *icd = container_of(vb->vb2_queue, struct soc_camera_device, vb2_vidq);
372 struct soc_camera_host *ici = to_soc_camera_host(icd->parent);
373 struct sh_mobile_ceu_dev *pcdev = ici->priv;
374 struct sh_mobile_ceu_buffer *buf = to_ceu_vb(vb);
375 unsigned long size;
376 int bytes_per_line = soc_mbus_bytes_per_line(icd->user_width,
377 icd->current_fmt->host_fmt);
378
379 if (bytes_per_line < 0)
380 goto error;
381
382 size = icd->user_height * bytes_per_line;
383
384 if (vb2_plane_size(vb, 0) < size) {
385 dev_err(icd->parent, "Buffer #%d too small (%lu < %lu)\n",
386 vb->v4l2_buf.index, vb2_plane_size(vb, 0), size);
387 goto error;
388 }
389
390 vb2_set_plane_payload(vb, 0, size);
391
392 dev_dbg(icd->parent, "%s (vb=0x%p) 0x%p %lu\n", __func__,
393 vb, vb2_plane_vaddr(vb, 0), vb2_get_plane_payload(vb, 0));
394
395 #ifdef DEBUG
396 /*
397 * This can be useful if you want to see if we actually fill
398 * the buffer with something
399 */
400 if (vb2_plane_vaddr(vb, 0))
401 memset(vb2_plane_vaddr(vb, 0), 0xaa, vb2_get_plane_payload(vb, 0));
402 #endif
403
404 spin_lock_irq(&pcdev->lock);
405 list_add_tail(&buf->queue, &pcdev->capture);
406
407 if (!pcdev->active) {
408 /*
409 * Because there were no active buffer at this moment,
410 * we are not interested in the return value of
411 * sh_mobile_ceu_capture here.
412 */
413 pcdev->active = vb;
414 sh_mobile_ceu_capture(pcdev);
415 }
416 spin_unlock_irq(&pcdev->lock);
417
418 return;
419
420 error:
421 vb2_buffer_done(vb, VB2_BUF_STATE_ERROR);
422 }
423
424 static void sh_mobile_ceu_videobuf_release(struct vb2_buffer *vb)
425 {
426 struct soc_camera_device *icd = container_of(vb->vb2_queue, struct soc_camera_device, vb2_vidq);
427 struct soc_camera_host *ici = to_soc_camera_host(icd->parent);
428 struct sh_mobile_ceu_buffer *buf = to_ceu_vb(vb);
429 struct sh_mobile_ceu_dev *pcdev = ici->priv;
430
431 spin_lock_irq(&pcdev->lock);
432
433 if (pcdev->active == vb) {
434 /* disable capture (release DMA buffer), reset */
435 ceu_write(pcdev, CAPSR, 1 << 16);
436 pcdev->active = NULL;
437 }
438
439 /*
440 * Doesn't hurt also if the list is empty, but it hurts, if queuing the
441 * buffer failed, and .buf_init() hasn't been called
442 */
443 if (buf->queue.next)
444 list_del_init(&buf->queue);
445
446 pcdev->buf_total -= PAGE_ALIGN(vb2_plane_size(vb, 0));
447 dev_dbg(icd->parent, "%s() %zu bytes buffers\n", __func__,
448 pcdev->buf_total);
449
450 spin_unlock_irq(&pcdev->lock);
451 }
452
453 static int sh_mobile_ceu_videobuf_init(struct vb2_buffer *vb)
454 {
455 struct soc_camera_device *icd = container_of(vb->vb2_queue, struct soc_camera_device, vb2_vidq);
456 struct soc_camera_host *ici = to_soc_camera_host(icd->parent);
457 struct sh_mobile_ceu_dev *pcdev = ici->priv;
458
459 pcdev->buf_total += PAGE_ALIGN(vb2_plane_size(vb, 0));
460 dev_dbg(icd->parent, "%s() %zu bytes buffers\n", __func__,
461 pcdev->buf_total);
462
463 /* This is for locking debugging only */
464 INIT_LIST_HEAD(&to_ceu_vb(vb)->queue);
465 return 0;
466 }
467
468 static int sh_mobile_ceu_stop_streaming(struct vb2_queue *q)
469 {
470 struct soc_camera_device *icd = container_of(q, struct soc_camera_device, vb2_vidq);
471 struct soc_camera_host *ici = to_soc_camera_host(icd->parent);
472 struct sh_mobile_ceu_dev *pcdev = ici->priv;
473 struct list_head *buf_head, *tmp;
474
475 spin_lock_irq(&pcdev->lock);
476
477 pcdev->active = NULL;
478
479 list_for_each_safe(buf_head, tmp, &pcdev->capture)
480 list_del_init(buf_head);
481
482 spin_unlock_irq(&pcdev->lock);
483
484 return sh_mobile_ceu_soft_reset(pcdev);
485 }
486
487 static struct vb2_ops sh_mobile_ceu_videobuf_ops = {
488 .queue_setup = sh_mobile_ceu_videobuf_setup,
489 .buf_prepare = sh_mobile_ceu_videobuf_prepare,
490 .buf_queue = sh_mobile_ceu_videobuf_queue,
491 .buf_cleanup = sh_mobile_ceu_videobuf_release,
492 .buf_init = sh_mobile_ceu_videobuf_init,
493 .wait_prepare = soc_camera_unlock,
494 .wait_finish = soc_camera_lock,
495 .stop_streaming = sh_mobile_ceu_stop_streaming,
496 };
497
498 static irqreturn_t sh_mobile_ceu_irq(int irq, void *data)
499 {
500 struct sh_mobile_ceu_dev *pcdev = data;
501 struct vb2_buffer *vb;
502 int ret;
503
504 spin_lock(&pcdev->lock);
505
506 vb = pcdev->active;
507 if (!vb)
508 /* Stale interrupt from a released buffer */
509 goto out;
510
511 list_del_init(&to_ceu_vb(vb)->queue);
512
513 if (!list_empty(&pcdev->capture))
514 pcdev->active = &list_entry(pcdev->capture.next,
515 struct sh_mobile_ceu_buffer, queue)->vb;
516 else
517 pcdev->active = NULL;
518
519 ret = sh_mobile_ceu_capture(pcdev);
520 do_gettimeofday(&vb->v4l2_buf.timestamp);
521 if (!ret) {
522 vb->v4l2_buf.field = pcdev->field;
523 vb->v4l2_buf.sequence = pcdev->sequence++;
524 }
525 vb2_buffer_done(vb, ret < 0 ? VB2_BUF_STATE_ERROR : VB2_BUF_STATE_DONE);
526
527 out:
528 spin_unlock(&pcdev->lock);
529
530 return IRQ_HANDLED;
531 }
532
533 static struct v4l2_subdev *find_csi2(struct sh_mobile_ceu_dev *pcdev)
534 {
535 struct v4l2_subdev *sd;
536
537 if (!pcdev->csi2_pdev)
538 return NULL;
539
540 v4l2_device_for_each_subdev(sd, &pcdev->ici.v4l2_dev)
541 if (&pcdev->csi2_pdev->dev == v4l2_get_subdevdata(sd))
542 return sd;
543
544 return NULL;
545 }
546
547 /* Called with .video_lock held */
548 static int sh_mobile_ceu_add_device(struct soc_camera_device *icd)
549 {
550 struct soc_camera_host *ici = to_soc_camera_host(icd->parent);
551 struct sh_mobile_ceu_dev *pcdev = ici->priv;
552 struct v4l2_subdev *csi2_sd;
553 int ret;
554
555 if (pcdev->icd)
556 return -EBUSY;
557
558 dev_info(icd->parent,
559 "SuperH Mobile CEU driver attached to camera %d\n",
560 icd->devnum);
561
562 pm_runtime_get_sync(ici->v4l2_dev.dev);
563
564 pcdev->buf_total = 0;
565
566 ret = sh_mobile_ceu_soft_reset(pcdev);
567
568 csi2_sd = find_csi2(pcdev);
569 if (csi2_sd) {
570 csi2_sd->grp_id = soc_camera_grp_id(icd);
571 v4l2_set_subdev_hostdata(csi2_sd, icd);
572 }
573
574 ret = v4l2_subdev_call(csi2_sd, core, s_power, 1);
575 if (ret < 0 && ret != -ENOIOCTLCMD && ret != -ENODEV) {
576 pm_runtime_put_sync(ici->v4l2_dev.dev);
577 return ret;
578 }
579
580 /*
581 * -ENODEV is special: either csi2_sd == NULL or the CSI-2 driver
582 * has not found this soc-camera device among its clients
583 */
584 if (ret == -ENODEV && csi2_sd)
585 csi2_sd->grp_id = 0;
586 pcdev->icd = icd;
587
588 return 0;
589 }
590
591 /* Called with .video_lock held */
592 static void sh_mobile_ceu_remove_device(struct soc_camera_device *icd)
593 {
594 struct soc_camera_host *ici = to_soc_camera_host(icd->parent);
595 struct sh_mobile_ceu_dev *pcdev = ici->priv;
596 struct v4l2_subdev *csi2_sd = find_csi2(pcdev);
597
598 BUG_ON(icd != pcdev->icd);
599
600 v4l2_subdev_call(csi2_sd, core, s_power, 0);
601 if (csi2_sd)
602 csi2_sd->grp_id = 0;
603 /* disable capture, disable interrupts */
604 ceu_write(pcdev, CEIER, 0);
605 sh_mobile_ceu_soft_reset(pcdev);
606
607 /* make sure active buffer is canceled */
608 spin_lock_irq(&pcdev->lock);
609 if (pcdev->active) {
610 list_del_init(&to_ceu_vb(pcdev->active)->queue);
611 vb2_buffer_done(pcdev->active, VB2_BUF_STATE_ERROR);
612 pcdev->active = NULL;
613 }
614 spin_unlock_irq(&pcdev->lock);
615
616 pm_runtime_put_sync(ici->v4l2_dev.dev);
617
618 dev_info(icd->parent,
619 "SuperH Mobile CEU driver detached from camera %d\n",
620 icd->devnum);
621
622 pcdev->icd = NULL;
623 }
624
625 /*
626 * See chapter 29.4.12 "Capture Filter Control Register (CFLCR)"
627 * in SH7722 Hardware Manual
628 */
629 static unsigned int size_dst(unsigned int src, unsigned int scale)
630 {
631 unsigned int mant_pre = scale >> 12;
632 if (!src || !scale)
633 return src;
634 return ((mant_pre + 2 * (src - 1)) / (2 * mant_pre) - 1) *
635 mant_pre * 4096 / scale + 1;
636 }
637
638 static u16 calc_scale(unsigned int src, unsigned int *dst)
639 {
640 u16 scale;
641
642 if (src == *dst)
643 return 0;
644
645 scale = (src * 4096 / *dst) & ~7;
646
647 while (scale > 4096 && size_dst(src, scale) < *dst)
648 scale -= 8;
649
650 *dst = size_dst(src, scale);
651
652 return scale;
653 }
654
655 /* rect is guaranteed to not exceed the scaled camera rectangle */
656 static void sh_mobile_ceu_set_rect(struct soc_camera_device *icd)
657 {
658 struct soc_camera_host *ici = to_soc_camera_host(icd->parent);
659 struct sh_mobile_ceu_cam *cam = icd->host_priv;
660 struct sh_mobile_ceu_dev *pcdev = ici->priv;
661 unsigned int height, width, cdwdr_width, in_width, in_height;
662 unsigned int left_offset, top_offset;
663 u32 camor;
664
665 dev_geo(icd->parent, "Crop %ux%u@%u:%u\n",
666 icd->user_width, icd->user_height, cam->ceu_left, cam->ceu_top);
667
668 left_offset = cam->ceu_left;
669 top_offset = cam->ceu_top;
670
671 WARN_ON(icd->user_width & 3 || icd->user_height & 3);
672
673 width = icd->user_width;
674
675 if (pcdev->image_mode) {
676 in_width = cam->width;
677 if (!pcdev->is_16bit) {
678 in_width *= 2;
679 left_offset *= 2;
680 }
681 cdwdr_width = width;
682 } else {
683 int bytes_per_line = soc_mbus_bytes_per_line(width,
684 icd->current_fmt->host_fmt);
685 unsigned int w_factor;
686
687 switch (icd->current_fmt->host_fmt->packing) {
688 case SOC_MBUS_PACKING_2X8_PADHI:
689 w_factor = 2;
690 break;
691 default:
692 w_factor = 1;
693 }
694
695 in_width = cam->width * w_factor;
696 left_offset *= w_factor;
697
698 if (bytes_per_line < 0)
699 cdwdr_width = width;
700 else
701 cdwdr_width = bytes_per_line;
702 }
703
704 height = icd->user_height;
705 in_height = cam->height;
706 if (V4L2_FIELD_NONE != pcdev->field) {
707 height = (height / 2) & ~3;
708 in_height /= 2;
709 top_offset /= 2;
710 cdwdr_width *= 2;
711 }
712
713 /* CSI2 special configuration */
714 if (pcdev->pdata->csi2) {
715 in_width = ((in_width - 2) * 2);
716 left_offset *= 2;
717 }
718
719 /* Set CAMOR, CAPWR, CFSZR, take care of CDWDR */
720 camor = left_offset | (top_offset << 16);
721
722 dev_geo(icd->parent,
723 "CAMOR 0x%x, CAPWR 0x%x, CFSZR 0x%x, CDWDR 0x%x\n", camor,
724 (in_height << 16) | in_width, (height << 16) | width,
725 cdwdr_width);
726
727 ceu_write(pcdev, CAMOR, camor);
728 ceu_write(pcdev, CAPWR, (in_height << 16) | in_width);
729 /* CFSZR clipping is applied _after_ the scaling filter (CFLCR) */
730 ceu_write(pcdev, CFSZR, (height << 16) | width);
731 ceu_write(pcdev, CDWDR, cdwdr_width);
732 }
733
734 static u32 capture_save_reset(struct sh_mobile_ceu_dev *pcdev)
735 {
736 u32 capsr = ceu_read(pcdev, CAPSR);
737 ceu_write(pcdev, CAPSR, 1 << 16); /* reset, stop capture */
738 return capsr;
739 }
740
741 static void capture_restore(struct sh_mobile_ceu_dev *pcdev, u32 capsr)
742 {
743 unsigned long timeout = jiffies + 10 * HZ;
744
745 /*
746 * Wait until the end of the current frame. It can take a long time,
747 * but if it has been aborted by a CAPSR reset, it shoule exit sooner.
748 */
749 while ((ceu_read(pcdev, CSTSR) & 1) && time_before(jiffies, timeout))
750 msleep(1);
751
752 if (time_after(jiffies, timeout)) {
753 dev_err(pcdev->ici.v4l2_dev.dev,
754 "Timeout waiting for frame end! Interface problem?\n");
755 return;
756 }
757
758 /* Wait until reset clears, this shall not hang... */
759 while (ceu_read(pcdev, CAPSR) & (1 << 16))
760 udelay(10);
761
762 /* Anything to restore? */
763 if (capsr & ~(1 << 16))
764 ceu_write(pcdev, CAPSR, capsr);
765 }
766
767 /* Find the bus subdevice driver, e.g., CSI2 */
768 static struct v4l2_subdev *find_bus_subdev(struct sh_mobile_ceu_dev *pcdev,
769 struct soc_camera_device *icd)
770 {
771 if (pcdev->csi2_pdev) {
772 struct v4l2_subdev *csi2_sd = find_csi2(pcdev);
773 if (csi2_sd && csi2_sd->grp_id == soc_camera_grp_id(icd))
774 return csi2_sd;
775 }
776
777 return soc_camera_to_subdev(icd);
778 }
779
780 #define CEU_BUS_FLAGS (V4L2_MBUS_MASTER | \
781 V4L2_MBUS_PCLK_SAMPLE_RISING | \
782 V4L2_MBUS_HSYNC_ACTIVE_HIGH | \
783 V4L2_MBUS_HSYNC_ACTIVE_LOW | \
784 V4L2_MBUS_VSYNC_ACTIVE_HIGH | \
785 V4L2_MBUS_VSYNC_ACTIVE_LOW | \
786 V4L2_MBUS_DATA_ACTIVE_HIGH)
787
788 /* Capture is not running, no interrupts, no locking needed */
789 static int sh_mobile_ceu_set_bus_param(struct soc_camera_device *icd,
790 __u32 pixfmt)
791 {
792 struct soc_camera_host *ici = to_soc_camera_host(icd->parent);
793 struct sh_mobile_ceu_dev *pcdev = ici->priv;
794 struct v4l2_subdev *sd = find_bus_subdev(pcdev, icd);
795 struct sh_mobile_ceu_cam *cam = icd->host_priv;
796 struct v4l2_mbus_config cfg = {.type = V4L2_MBUS_PARALLEL,};
797 unsigned long value, common_flags = CEU_BUS_FLAGS;
798 u32 capsr = capture_save_reset(pcdev);
799 unsigned int yuv_lineskip;
800 int ret;
801
802 /*
803 * If the client doesn't implement g_mbus_config, we just use our
804 * platform data
805 */
806 ret = v4l2_subdev_call(sd, video, g_mbus_config, &cfg);
807 if (!ret) {
808 common_flags = soc_mbus_config_compatible(&cfg,
809 common_flags);
810 if (!common_flags)
811 return -EINVAL;
812 } else if (ret != -ENOIOCTLCMD) {
813 return ret;
814 }
815
816 /* Make choises, based on platform preferences */
817 if ((common_flags & V4L2_MBUS_HSYNC_ACTIVE_HIGH) &&
818 (common_flags & V4L2_MBUS_HSYNC_ACTIVE_LOW)) {
819 if (pcdev->pdata->flags & SH_CEU_FLAG_HSYNC_LOW)
820 common_flags &= ~V4L2_MBUS_HSYNC_ACTIVE_HIGH;
821 else
822 common_flags &= ~V4L2_MBUS_HSYNC_ACTIVE_LOW;
823 }
824
825 if ((common_flags & V4L2_MBUS_VSYNC_ACTIVE_HIGH) &&
826 (common_flags & V4L2_MBUS_VSYNC_ACTIVE_LOW)) {
827 if (pcdev->pdata->flags & SH_CEU_FLAG_VSYNC_LOW)
828 common_flags &= ~V4L2_MBUS_VSYNC_ACTIVE_HIGH;
829 else
830 common_flags &= ~V4L2_MBUS_VSYNC_ACTIVE_LOW;
831 }
832
833 cfg.flags = common_flags;
834 ret = v4l2_subdev_call(sd, video, s_mbus_config, &cfg);
835 if (ret < 0 && ret != -ENOIOCTLCMD)
836 return ret;
837
838 if (icd->current_fmt->host_fmt->bits_per_sample > 8)
839 pcdev->is_16bit = 1;
840 else
841 pcdev->is_16bit = 0;
842
843 ceu_write(pcdev, CRCNTR, 0);
844 ceu_write(pcdev, CRCMPR, 0);
845
846 value = 0x00000010; /* data fetch by default */
847 yuv_lineskip = 0x10;
848
849 switch (icd->current_fmt->host_fmt->fourcc) {
850 case V4L2_PIX_FMT_NV12:
851 case V4L2_PIX_FMT_NV21:
852 /* convert 4:2:2 -> 4:2:0 */
853 yuv_lineskip = 0; /* skip for NV12/21, no skip for NV16/61 */
854 /* fall-through */
855 case V4L2_PIX_FMT_NV16:
856 case V4L2_PIX_FMT_NV61:
857 switch (cam->code) {
858 case V4L2_MBUS_FMT_UYVY8_2X8:
859 value = 0x00000000; /* Cb0, Y0, Cr0, Y1 */
860 break;
861 case V4L2_MBUS_FMT_VYUY8_2X8:
862 value = 0x00000100; /* Cr0, Y0, Cb0, Y1 */
863 break;
864 case V4L2_MBUS_FMT_YUYV8_2X8:
865 value = 0x00000200; /* Y0, Cb0, Y1, Cr0 */
866 break;
867 case V4L2_MBUS_FMT_YVYU8_2X8:
868 value = 0x00000300; /* Y0, Cr0, Y1, Cb0 */
869 break;
870 default:
871 BUG();
872 }
873 }
874
875 if (icd->current_fmt->host_fmt->fourcc == V4L2_PIX_FMT_NV21 ||
876 icd->current_fmt->host_fmt->fourcc == V4L2_PIX_FMT_NV61)
877 value ^= 0x00000100; /* swap U, V to change from NV1x->NVx1 */
878
879 value |= common_flags & V4L2_MBUS_VSYNC_ACTIVE_LOW ? 1 << 1 : 0;
880 value |= common_flags & V4L2_MBUS_HSYNC_ACTIVE_LOW ? 1 << 0 : 0;
881 value |= pcdev->is_16bit ? 1 << 12 : 0;
882
883 /* CSI2 mode */
884 if (pcdev->pdata->csi2)
885 value |= 3 << 12;
886
887 ceu_write(pcdev, CAMCR, value);
888
889 ceu_write(pcdev, CAPCR, 0x00300000);
890
891 switch (pcdev->field) {
892 case V4L2_FIELD_INTERLACED_TB:
893 value = 0x101;
894 break;
895 case V4L2_FIELD_INTERLACED_BT:
896 value = 0x102;
897 break;
898 default:
899 value = 0;
900 break;
901 }
902 ceu_write(pcdev, CAIFR, value);
903
904 sh_mobile_ceu_set_rect(icd);
905 mdelay(1);
906
907 dev_geo(icd->parent, "CFLCR 0x%x\n", pcdev->cflcr);
908 ceu_write(pcdev, CFLCR, pcdev->cflcr);
909
910 /*
911 * A few words about byte order (observed in Big Endian mode)
912 *
913 * In data fetch mode bytes are received in chunks of 8 bytes.
914 * D0, D1, D2, D3, D4, D5, D6, D7 (D0 received first)
915 *
916 * The data is however by default written to memory in reverse order:
917 * D7, D6, D5, D4, D3, D2, D1, D0 (D7 written to lowest byte)
918 *
919 * The lowest three bits of CDOCR allows us to do swapping,
920 * using 7 we swap the data bytes to match the incoming order:
921 * D0, D1, D2, D3, D4, D5, D6, D7
922 */
923 value = 0x00000007 | yuv_lineskip;
924
925 ceu_write(pcdev, CDOCR, value);
926 ceu_write(pcdev, CFWCR, 0); /* keep "datafetch firewall" disabled */
927
928 dev_dbg(icd->parent, "S_FMT successful for %c%c%c%c %ux%u\n",
929 pixfmt & 0xff, (pixfmt >> 8) & 0xff,
930 (pixfmt >> 16) & 0xff, (pixfmt >> 24) & 0xff,
931 icd->user_width, icd->user_height);
932
933 capture_restore(pcdev, capsr);
934
935 /* not in bundle mode: skip CBDSR, CDAYR2, CDACR2, CDBYR2, CDBCR2 */
936 return 0;
937 }
938
939 static int sh_mobile_ceu_try_bus_param(struct soc_camera_device *icd,
940 unsigned char buswidth)
941 {
942 struct soc_camera_host *ici = to_soc_camera_host(icd->parent);
943 struct sh_mobile_ceu_dev *pcdev = ici->priv;
944 struct v4l2_subdev *sd = find_bus_subdev(pcdev, icd);
945 unsigned long common_flags = CEU_BUS_FLAGS;
946 struct v4l2_mbus_config cfg = {.type = V4L2_MBUS_PARALLEL,};
947 int ret;
948
949 ret = v4l2_subdev_call(sd, video, g_mbus_config, &cfg);
950 if (!ret)
951 common_flags = soc_mbus_config_compatible(&cfg,
952 common_flags);
953 else if (ret != -ENOIOCTLCMD)
954 return ret;
955
956 if (!common_flags || buswidth > 16)
957 return -EINVAL;
958
959 return 0;
960 }
961
962 static const struct soc_mbus_pixelfmt sh_mobile_ceu_formats[] = {
963 {
964 .fourcc = V4L2_PIX_FMT_NV12,
965 .name = "NV12",
966 .bits_per_sample = 8,
967 .packing = SOC_MBUS_PACKING_1_5X8,
968 .order = SOC_MBUS_ORDER_LE,
969 }, {
970 .fourcc = V4L2_PIX_FMT_NV21,
971 .name = "NV21",
972 .bits_per_sample = 8,
973 .packing = SOC_MBUS_PACKING_1_5X8,
974 .order = SOC_MBUS_ORDER_LE,
975 }, {
976 .fourcc = V4L2_PIX_FMT_NV16,
977 .name = "NV16",
978 .bits_per_sample = 8,
979 .packing = SOC_MBUS_PACKING_2X8_PADHI,
980 .order = SOC_MBUS_ORDER_LE,
981 }, {
982 .fourcc = V4L2_PIX_FMT_NV61,
983 .name = "NV61",
984 .bits_per_sample = 8,
985 .packing = SOC_MBUS_PACKING_2X8_PADHI,
986 .order = SOC_MBUS_ORDER_LE,
987 },
988 };
989
990 /* This will be corrected as we get more formats */
991 static bool sh_mobile_ceu_packing_supported(const struct soc_mbus_pixelfmt *fmt)
992 {
993 return fmt->packing == SOC_MBUS_PACKING_NONE ||
994 (fmt->bits_per_sample == 8 &&
995 fmt->packing == SOC_MBUS_PACKING_1_5X8) ||
996 (fmt->bits_per_sample == 8 &&
997 fmt->packing == SOC_MBUS_PACKING_2X8_PADHI) ||
998 (fmt->bits_per_sample > 8 &&
999 fmt->packing == SOC_MBUS_PACKING_EXTEND16);
1000 }
1001
1002 static int client_g_rect(struct v4l2_subdev *sd, struct v4l2_rect *rect);
1003
1004 static struct soc_camera_device *ctrl_to_icd(struct v4l2_ctrl *ctrl)
1005 {
1006 return container_of(ctrl->handler, struct soc_camera_device,
1007 ctrl_handler);
1008 }
1009
1010 static int sh_mobile_ceu_s_ctrl(struct v4l2_ctrl *ctrl)
1011 {
1012 struct soc_camera_device *icd = ctrl_to_icd(ctrl);
1013 struct soc_camera_host *ici = to_soc_camera_host(icd->parent);
1014 struct sh_mobile_ceu_dev *pcdev = ici->priv;
1015
1016 switch (ctrl->id) {
1017 case V4L2_CID_SHARPNESS:
1018 switch (icd->current_fmt->host_fmt->fourcc) {
1019 case V4L2_PIX_FMT_NV12:
1020 case V4L2_PIX_FMT_NV21:
1021 case V4L2_PIX_FMT_NV16:
1022 case V4L2_PIX_FMT_NV61:
1023 ceu_write(pcdev, CLFCR, !ctrl->val);
1024 return 0;
1025 }
1026 break;
1027 }
1028
1029 return -EINVAL;
1030 }
1031
1032 static const struct v4l2_ctrl_ops sh_mobile_ceu_ctrl_ops = {
1033 .s_ctrl = sh_mobile_ceu_s_ctrl,
1034 };
1035
1036 static int sh_mobile_ceu_get_formats(struct soc_camera_device *icd, unsigned int idx,
1037 struct soc_camera_format_xlate *xlate)
1038 {
1039 struct v4l2_subdev *sd = soc_camera_to_subdev(icd);
1040 struct device *dev = icd->parent;
1041 struct soc_camera_host *ici = to_soc_camera_host(dev);
1042 struct sh_mobile_ceu_dev *pcdev = ici->priv;
1043 int ret, k, n;
1044 int formats = 0;
1045 struct sh_mobile_ceu_cam *cam;
1046 enum v4l2_mbus_pixelcode code;
1047 const struct soc_mbus_pixelfmt *fmt;
1048
1049 ret = v4l2_subdev_call(sd, video, enum_mbus_fmt, idx, &code);
1050 if (ret < 0)
1051 /* No more formats */
1052 return 0;
1053
1054 fmt = soc_mbus_get_fmtdesc(code);
1055 if (!fmt) {
1056 dev_warn(dev, "unsupported format code #%u: %d\n", idx, code);
1057 return 0;
1058 }
1059
1060 if (!pcdev->pdata->csi2) {
1061 /* Are there any restrictions in the CSI-2 case? */
1062 ret = sh_mobile_ceu_try_bus_param(icd, fmt->bits_per_sample);
1063 if (ret < 0)
1064 return 0;
1065 }
1066
1067 if (!icd->host_priv) {
1068 struct v4l2_mbus_framefmt mf;
1069 struct v4l2_rect rect;
1070 int shift = 0;
1071
1072 /* Add our control */
1073 v4l2_ctrl_new_std(&icd->ctrl_handler, &sh_mobile_ceu_ctrl_ops,
1074 V4L2_CID_SHARPNESS, 0, 1, 1, 0);
1075 if (icd->ctrl_handler.error)
1076 return icd->ctrl_handler.error;
1077
1078 /* FIXME: subwindow is lost between close / open */
1079
1080 /* Cache current client geometry */
1081 ret = client_g_rect(sd, &rect);
1082 if (ret < 0)
1083 return ret;
1084
1085 /* First time */
1086 ret = v4l2_subdev_call(sd, video, g_mbus_fmt, &mf);
1087 if (ret < 0)
1088 return ret;
1089
1090 while ((mf.width > 2560 || mf.height > 1920) && shift < 4) {
1091 /* Try 2560x1920, 1280x960, 640x480, 320x240 */
1092 mf.width = 2560 >> shift;
1093 mf.height = 1920 >> shift;
1094 ret = v4l2_device_call_until_err(sd->v4l2_dev,
1095 soc_camera_grp_id(icd), video,
1096 s_mbus_fmt, &mf);
1097 if (ret < 0)
1098 return ret;
1099 shift++;
1100 }
1101
1102 if (shift == 4) {
1103 dev_err(dev, "Failed to configure the client below %ux%x\n",
1104 mf.width, mf.height);
1105 return -EIO;
1106 }
1107
1108 dev_geo(dev, "camera fmt %ux%u\n", mf.width, mf.height);
1109
1110 cam = kzalloc(sizeof(*cam), GFP_KERNEL);
1111 if (!cam)
1112 return -ENOMEM;
1113
1114 /* We are called with current camera crop, initialise subrect with it */
1115 cam->rect = rect;
1116 cam->subrect = rect;
1117
1118 cam->width = mf.width;
1119 cam->height = mf.height;
1120
1121 icd->host_priv = cam;
1122 } else {
1123 cam = icd->host_priv;
1124 }
1125
1126 /* Beginning of a pass */
1127 if (!idx)
1128 cam->extra_fmt = NULL;
1129
1130 switch (code) {
1131 case V4L2_MBUS_FMT_UYVY8_2X8:
1132 case V4L2_MBUS_FMT_VYUY8_2X8:
1133 case V4L2_MBUS_FMT_YUYV8_2X8:
1134 case V4L2_MBUS_FMT_YVYU8_2X8:
1135 if (cam->extra_fmt)
1136 break;
1137
1138 /*
1139 * Our case is simple so far: for any of the above four camera
1140 * formats we add all our four synthesized NV* formats, so,
1141 * just marking the device with a single flag suffices. If
1142 * the format generation rules are more complex, you would have
1143 * to actually hang your already added / counted formats onto
1144 * the host_priv pointer and check whether the format you're
1145 * going to add now is already there.
1146 */
1147 cam->extra_fmt = sh_mobile_ceu_formats;
1148
1149 n = ARRAY_SIZE(sh_mobile_ceu_formats);
1150 formats += n;
1151 for (k = 0; xlate && k < n; k++) {
1152 xlate->host_fmt = &sh_mobile_ceu_formats[k];
1153 xlate->code = code;
1154 xlate++;
1155 dev_dbg(dev, "Providing format %s using code %d\n",
1156 sh_mobile_ceu_formats[k].name, code);
1157 }
1158 break;
1159 default:
1160 if (!sh_mobile_ceu_packing_supported(fmt))
1161 return 0;
1162 }
1163
1164 /* Generic pass-through */
1165 formats++;
1166 if (xlate) {
1167 xlate->host_fmt = fmt;
1168 xlate->code = code;
1169 xlate++;
1170 dev_dbg(dev, "Providing format %s in pass-through mode\n",
1171 fmt->name);
1172 }
1173
1174 return formats;
1175 }
1176
1177 static void sh_mobile_ceu_put_formats(struct soc_camera_device *icd)
1178 {
1179 kfree(icd->host_priv);
1180 icd->host_priv = NULL;
1181 }
1182
1183 /* Check if any dimension of r1 is smaller than respective one of r2 */
1184 static bool is_smaller(struct v4l2_rect *r1, struct v4l2_rect *r2)
1185 {
1186 return r1->width < r2->width || r1->height < r2->height;
1187 }
1188
1189 /* Check if r1 fails to cover r2 */
1190 static bool is_inside(struct v4l2_rect *r1, struct v4l2_rect *r2)
1191 {
1192 return r1->left > r2->left || r1->top > r2->top ||
1193 r1->left + r1->width < r2->left + r2->width ||
1194 r1->top + r1->height < r2->top + r2->height;
1195 }
1196
1197 static unsigned int scale_down(unsigned int size, unsigned int scale)
1198 {
1199 return (size * 4096 + scale / 2) / scale;
1200 }
1201
1202 static unsigned int calc_generic_scale(unsigned int input, unsigned int output)
1203 {
1204 return (input * 4096 + output / 2) / output;
1205 }
1206
1207 /* Get and store current client crop */
1208 static int client_g_rect(struct v4l2_subdev *sd, struct v4l2_rect *rect)
1209 {
1210 struct v4l2_crop crop;
1211 struct v4l2_cropcap cap;
1212 int ret;
1213
1214 crop.type = V4L2_BUF_TYPE_VIDEO_CAPTURE;
1215
1216 ret = v4l2_subdev_call(sd, video, g_crop, &crop);
1217 if (!ret) {
1218 *rect = crop.c;
1219 return ret;
1220 }
1221
1222 /* Camera driver doesn't support .g_crop(), assume default rectangle */
1223 cap.type = V4L2_BUF_TYPE_VIDEO_CAPTURE;
1224
1225 ret = v4l2_subdev_call(sd, video, cropcap, &cap);
1226 if (!ret)
1227 *rect = cap.defrect;
1228
1229 return ret;
1230 }
1231
1232 /* Client crop has changed, update our sub-rectangle to remain within the area */
1233 static void update_subrect(struct sh_mobile_ceu_cam *cam)
1234 {
1235 struct v4l2_rect *rect = &cam->rect, *subrect = &cam->subrect;
1236
1237 if (rect->width < subrect->width)
1238 subrect->width = rect->width;
1239
1240 if (rect->height < subrect->height)
1241 subrect->height = rect->height;
1242
1243 if (rect->left > subrect->left)
1244 subrect->left = rect->left;
1245 else if (rect->left + rect->width >
1246 subrect->left + subrect->width)
1247 subrect->left = rect->left + rect->width -
1248 subrect->width;
1249
1250 if (rect->top > subrect->top)
1251 subrect->top = rect->top;
1252 else if (rect->top + rect->height >
1253 subrect->top + subrect->height)
1254 subrect->top = rect->top + rect->height -
1255 subrect->height;
1256 }
1257
1258 /*
1259 * The common for both scaling and cropping iterative approach is:
1260 * 1. try if the client can produce exactly what requested by the user
1261 * 2. if (1) failed, try to double the client image until we get one big enough
1262 * 3. if (2) failed, try to request the maximum image
1263 */
1264 static int client_s_crop(struct soc_camera_device *icd, struct v4l2_crop *crop,
1265 struct v4l2_crop *cam_crop)
1266 {
1267 struct v4l2_subdev *sd = soc_camera_to_subdev(icd);
1268 struct v4l2_rect *rect = &crop->c, *cam_rect = &cam_crop->c;
1269 struct device *dev = sd->v4l2_dev->dev;
1270 struct sh_mobile_ceu_cam *cam = icd->host_priv;
1271 struct v4l2_cropcap cap;
1272 int ret;
1273 unsigned int width, height;
1274
1275 v4l2_subdev_call(sd, video, s_crop, crop);
1276 ret = client_g_rect(sd, cam_rect);
1277 if (ret < 0)
1278 return ret;
1279
1280 /*
1281 * Now cam_crop contains the current camera input rectangle, and it must
1282 * be within camera cropcap bounds
1283 */
1284 if (!memcmp(rect, cam_rect, sizeof(*rect))) {
1285 /* Even if camera S_CROP failed, but camera rectangle matches */
1286 dev_dbg(dev, "Camera S_CROP successful for %dx%d@%d:%d\n",
1287 rect->width, rect->height, rect->left, rect->top);
1288 cam->rect = *cam_rect;
1289 return 0;
1290 }
1291
1292 /* Try to fix cropping, that camera hasn't managed to set */
1293 dev_geo(dev, "Fix camera S_CROP for %dx%d@%d:%d to %dx%d@%d:%d\n",
1294 cam_rect->width, cam_rect->height,
1295 cam_rect->left, cam_rect->top,
1296 rect->width, rect->height, rect->left, rect->top);
1297
1298 /* We need sensor maximum rectangle */
1299 ret = v4l2_subdev_call(sd, video, cropcap, &cap);
1300 if (ret < 0)
1301 return ret;
1302
1303 /* Put user requested rectangle within sensor bounds */
1304 soc_camera_limit_side(&rect->left, &rect->width, cap.bounds.left, 2,
1305 cap.bounds.width);
1306 soc_camera_limit_side(&rect->top, &rect->height, cap.bounds.top, 4,
1307 cap.bounds.height);
1308
1309 /*
1310 * Popular special case - some cameras can only handle fixed sizes like
1311 * QVGA, VGA,... Take care to avoid infinite loop.
1312 */
1313 width = max(cam_rect->width, 2);
1314 height = max(cam_rect->height, 2);
1315
1316 /*
1317 * Loop as long as sensor is not covering the requested rectangle and
1318 * is still within its bounds
1319 */
1320 while (!ret && (is_smaller(cam_rect, rect) ||
1321 is_inside(cam_rect, rect)) &&
1322 (cap.bounds.width > width || cap.bounds.height > height)) {
1323
1324 width *= 2;
1325 height *= 2;
1326
1327 cam_rect->width = width;
1328 cam_rect->height = height;
1329
1330 /*
1331 * We do not know what capabilities the camera has to set up
1332 * left and top borders. We could try to be smarter in iterating
1333 * them, e.g., if camera current left is to the right of the
1334 * target left, set it to the middle point between the current
1335 * left and minimum left. But that would add too much
1336 * complexity: we would have to iterate each border separately.
1337 * Instead we just drop to the left and top bounds.
1338 */
1339 if (cam_rect->left > rect->left)
1340 cam_rect->left = cap.bounds.left;
1341
1342 if (cam_rect->left + cam_rect->width < rect->left + rect->width)
1343 cam_rect->width = rect->left + rect->width -
1344 cam_rect->left;
1345
1346 if (cam_rect->top > rect->top)
1347 cam_rect->top = cap.bounds.top;
1348
1349 if (cam_rect->top + cam_rect->height < rect->top + rect->height)
1350 cam_rect->height = rect->top + rect->height -
1351 cam_rect->top;
1352
1353 v4l2_subdev_call(sd, video, s_crop, cam_crop);
1354 ret = client_g_rect(sd, cam_rect);
1355 dev_geo(dev, "Camera S_CROP %d for %dx%d@%d:%d\n", ret,
1356 cam_rect->width, cam_rect->height,
1357 cam_rect->left, cam_rect->top);
1358 }
1359
1360 /* S_CROP must not modify the rectangle */
1361 if (is_smaller(cam_rect, rect) || is_inside(cam_rect, rect)) {
1362 /*
1363 * The camera failed to configure a suitable cropping,
1364 * we cannot use the current rectangle, set to max
1365 */
1366 *cam_rect = cap.bounds;
1367 v4l2_subdev_call(sd, video, s_crop, cam_crop);
1368 ret = client_g_rect(sd, cam_rect);
1369 dev_geo(dev, "Camera S_CROP %d for max %dx%d@%d:%d\n", ret,
1370 cam_rect->width, cam_rect->height,
1371 cam_rect->left, cam_rect->top);
1372 }
1373
1374 if (!ret) {
1375 cam->rect = *cam_rect;
1376 update_subrect(cam);
1377 }
1378
1379 return ret;
1380 }
1381
1382 /* Iterative s_mbus_fmt, also updates cached client crop on success */
1383 static int client_s_fmt(struct soc_camera_device *icd,
1384 struct v4l2_mbus_framefmt *mf, bool ceu_can_scale)
1385 {
1386 struct sh_mobile_ceu_cam *cam = icd->host_priv;
1387 struct v4l2_subdev *sd = soc_camera_to_subdev(icd);
1388 struct device *dev = icd->parent;
1389 unsigned int width = mf->width, height = mf->height, tmp_w, tmp_h;
1390 unsigned int max_width, max_height;
1391 struct v4l2_cropcap cap;
1392 bool ceu_1to1;
1393 int ret;
1394
1395 ret = v4l2_device_call_until_err(sd->v4l2_dev,
1396 soc_camera_grp_id(icd), video,
1397 s_mbus_fmt, mf);
1398 if (ret < 0)
1399 return ret;
1400
1401 dev_geo(dev, "camera scaled to %ux%u\n", mf->width, mf->height);
1402
1403 if (width == mf->width && height == mf->height) {
1404 /* Perfect! The client has done it all. */
1405 ceu_1to1 = true;
1406 goto update_cache;
1407 }
1408
1409 ceu_1to1 = false;
1410 if (!ceu_can_scale)
1411 goto update_cache;
1412
1413 cap.type = V4L2_BUF_TYPE_VIDEO_CAPTURE;
1414
1415 ret = v4l2_subdev_call(sd, video, cropcap, &cap);
1416 if (ret < 0)
1417 return ret;
1418
1419 max_width = min(cap.bounds.width, 2560);
1420 max_height = min(cap.bounds.height, 1920);
1421
1422 /* Camera set a format, but geometry is not precise, try to improve */
1423 tmp_w = mf->width;
1424 tmp_h = mf->height;
1425
1426 /* width <= max_width && height <= max_height - guaranteed by try_fmt */
1427 while ((width > tmp_w || height > tmp_h) &&
1428 tmp_w < max_width && tmp_h < max_height) {
1429 tmp_w = min(2 * tmp_w, max_width);
1430 tmp_h = min(2 * tmp_h, max_height);
1431 mf->width = tmp_w;
1432 mf->height = tmp_h;
1433 ret = v4l2_device_call_until_err(sd->v4l2_dev,
1434 soc_camera_grp_id(icd), video,
1435 s_mbus_fmt, mf);
1436 dev_geo(dev, "Camera scaled to %ux%u\n",
1437 mf->width, mf->height);
1438 if (ret < 0) {
1439 /* This shouldn't happen */
1440 dev_err(dev, "Client failed to set format: %d\n", ret);
1441 return ret;
1442 }
1443 }
1444
1445 update_cache:
1446 /* Update cache */
1447 ret = client_g_rect(sd, &cam->rect);
1448 if (ret < 0)
1449 return ret;
1450
1451 if (ceu_1to1)
1452 cam->subrect = cam->rect;
1453 else
1454 update_subrect(cam);
1455
1456 return 0;
1457 }
1458
1459 /**
1460 * @width - on output: user width, mapped back to input
1461 * @height - on output: user height, mapped back to input
1462 * @mf - in- / output camera output window
1463 */
1464 static int client_scale(struct soc_camera_device *icd,
1465 struct v4l2_mbus_framefmt *mf,
1466 unsigned int *width, unsigned int *height,
1467 bool ceu_can_scale)
1468 {
1469 struct sh_mobile_ceu_cam *cam = icd->host_priv;
1470 struct device *dev = icd->parent;
1471 struct v4l2_mbus_framefmt mf_tmp = *mf;
1472 unsigned int scale_h, scale_v;
1473 int ret;
1474
1475 /*
1476 * 5. Apply iterative camera S_FMT for camera user window (also updates
1477 * client crop cache and the imaginary sub-rectangle).
1478 */
1479 ret = client_s_fmt(icd, &mf_tmp, ceu_can_scale);
1480 if (ret < 0)
1481 return ret;
1482
1483 dev_geo(dev, "5: camera scaled to %ux%u\n",
1484 mf_tmp.width, mf_tmp.height);
1485
1486 /* 6. Retrieve camera output window (g_fmt) */
1487
1488 /* unneeded - it is already in "mf_tmp" */
1489
1490 /* 7. Calculate new client scales. */
1491 scale_h = calc_generic_scale(cam->rect.width, mf_tmp.width);
1492 scale_v = calc_generic_scale(cam->rect.height, mf_tmp.height);
1493
1494 mf->width = mf_tmp.width;
1495 mf->height = mf_tmp.height;
1496 mf->colorspace = mf_tmp.colorspace;
1497
1498 /*
1499 * 8. Calculate new CEU crop - apply camera scales to previously
1500 * updated "effective" crop.
1501 */
1502 *width = scale_down(cam->subrect.width, scale_h);
1503 *height = scale_down(cam->subrect.height, scale_v);
1504
1505 dev_geo(dev, "8: new client sub-window %ux%u\n", *width, *height);
1506
1507 return 0;
1508 }
1509
1510 /*
1511 * CEU can scale and crop, but we don't want to waste bandwidth and kill the
1512 * framerate by always requesting the maximum image from the client. See
1513 * Documentation/video4linux/sh_mobile_ceu_camera.txt for a description of
1514 * scaling and cropping algorithms and for the meaning of referenced here steps.
1515 */
1516 static int sh_mobile_ceu_set_crop(struct soc_camera_device *icd,
1517 struct v4l2_crop *a)
1518 {
1519 struct v4l2_rect *rect = &a->c;
1520 struct device *dev = icd->parent;
1521 struct soc_camera_host *ici = to_soc_camera_host(dev);
1522 struct sh_mobile_ceu_dev *pcdev = ici->priv;
1523 struct v4l2_crop cam_crop;
1524 struct sh_mobile_ceu_cam *cam = icd->host_priv;
1525 struct v4l2_rect *cam_rect = &cam_crop.c;
1526 struct v4l2_subdev *sd = soc_camera_to_subdev(icd);
1527 struct v4l2_mbus_framefmt mf;
1528 unsigned int scale_cam_h, scale_cam_v, scale_ceu_h, scale_ceu_v,
1529 out_width, out_height;
1530 int interm_width, interm_height;
1531 u32 capsr, cflcr;
1532 int ret;
1533
1534 dev_geo(dev, "S_CROP(%ux%u@%u:%u)\n", rect->width, rect->height,
1535 rect->left, rect->top);
1536
1537 /* During camera cropping its output window can change too, stop CEU */
1538 capsr = capture_save_reset(pcdev);
1539 dev_dbg(dev, "CAPSR 0x%x, CFLCR 0x%x\n", capsr, pcdev->cflcr);
1540
1541 /*
1542 * 1. - 2. Apply iterative camera S_CROP for new input window, read back
1543 * actual camera rectangle.
1544 */
1545 ret = client_s_crop(icd, a, &cam_crop);
1546 if (ret < 0)
1547 return ret;
1548
1549 dev_geo(dev, "1-2: camera cropped to %ux%u@%u:%u\n",
1550 cam_rect->width, cam_rect->height,
1551 cam_rect->left, cam_rect->top);
1552
1553 /* On success cam_crop contains current camera crop */
1554
1555 /* 3. Retrieve camera output window */
1556 ret = v4l2_subdev_call(sd, video, g_mbus_fmt, &mf);
1557 if (ret < 0)
1558 return ret;
1559
1560 if (mf.width > 2560 || mf.height > 1920)
1561 return -EINVAL;
1562
1563 /* 4. Calculate camera scales */
1564 scale_cam_h = calc_generic_scale(cam_rect->width, mf.width);
1565 scale_cam_v = calc_generic_scale(cam_rect->height, mf.height);
1566
1567 /* Calculate intermediate window */
1568 interm_width = scale_down(rect->width, scale_cam_h);
1569 interm_height = scale_down(rect->height, scale_cam_v);
1570
1571 if (interm_width < icd->user_width) {
1572 u32 new_scale_h;
1573
1574 new_scale_h = calc_generic_scale(rect->width, icd->user_width);
1575
1576 mf.width = scale_down(cam_rect->width, new_scale_h);
1577 }
1578
1579 if (interm_height < icd->user_height) {
1580 u32 new_scale_v;
1581
1582 new_scale_v = calc_generic_scale(rect->height, icd->user_height);
1583
1584 mf.height = scale_down(cam_rect->height, new_scale_v);
1585 }
1586
1587 if (interm_width < icd->user_width || interm_height < icd->user_height) {
1588 ret = v4l2_device_call_until_err(sd->v4l2_dev,
1589 soc_camera_grp_id(icd), video,
1590 s_mbus_fmt, &mf);
1591 if (ret < 0)
1592 return ret;
1593
1594 dev_geo(dev, "New camera output %ux%u\n", mf.width, mf.height);
1595 scale_cam_h = calc_generic_scale(cam_rect->width, mf.width);
1596 scale_cam_v = calc_generic_scale(cam_rect->height, mf.height);
1597 interm_width = scale_down(rect->width, scale_cam_h);
1598 interm_height = scale_down(rect->height, scale_cam_v);
1599 }
1600
1601 /* Cache camera output window */
1602 cam->width = mf.width;
1603 cam->height = mf.height;
1604
1605 if (pcdev->image_mode) {
1606 out_width = min(interm_width, icd->user_width);
1607 out_height = min(interm_height, icd->user_height);
1608 } else {
1609 out_width = interm_width;
1610 out_height = interm_height;
1611 }
1612
1613 /*
1614 * 5. Calculate CEU scales from camera scales from results of (5) and
1615 * the user window
1616 */
1617 scale_ceu_h = calc_scale(interm_width, &out_width);
1618 scale_ceu_v = calc_scale(interm_height, &out_height);
1619
1620 dev_geo(dev, "5: CEU scales %u:%u\n", scale_ceu_h, scale_ceu_v);
1621
1622 /* Apply CEU scales. */
1623 cflcr = scale_ceu_h | (scale_ceu_v << 16);
1624 if (cflcr != pcdev->cflcr) {
1625 pcdev->cflcr = cflcr;
1626 ceu_write(pcdev, CFLCR, cflcr);
1627 }
1628
1629 icd->user_width = out_width & ~3;
1630 icd->user_height = out_height & ~3;
1631 /* Offsets are applied at the CEU scaling filter input */
1632 cam->ceu_left = scale_down(rect->left - cam_rect->left, scale_cam_h) & ~1;
1633 cam->ceu_top = scale_down(rect->top - cam_rect->top, scale_cam_v) & ~1;
1634
1635 /* 6. Use CEU cropping to crop to the new window. */
1636 sh_mobile_ceu_set_rect(icd);
1637
1638 cam->subrect = *rect;
1639
1640 dev_geo(dev, "6: CEU cropped to %ux%u@%u:%u\n",
1641 icd->user_width, icd->user_height,
1642 cam->ceu_left, cam->ceu_top);
1643
1644 /* Restore capture. The CE bit can be cleared by the hardware */
1645 if (pcdev->active)
1646 capsr |= 1;
1647 capture_restore(pcdev, capsr);
1648
1649 /* Even if only camera cropping succeeded */
1650 return ret;
1651 }
1652
1653 static int sh_mobile_ceu_get_crop(struct soc_camera_device *icd,
1654 struct v4l2_crop *a)
1655 {
1656 struct sh_mobile_ceu_cam *cam = icd->host_priv;
1657
1658 a->type = V4L2_BUF_TYPE_VIDEO_CAPTURE;
1659 a->c = cam->subrect;
1660
1661 return 0;
1662 }
1663
1664 /*
1665 * Calculate real client output window by applying new scales to the current
1666 * client crop. New scales are calculated from the requested output format and
1667 * CEU crop, mapped backed onto the client input (subrect).
1668 */
1669 static void calculate_client_output(struct soc_camera_device *icd,
1670 const struct v4l2_pix_format *pix, struct v4l2_mbus_framefmt *mf)
1671 {
1672 struct sh_mobile_ceu_cam *cam = icd->host_priv;
1673 struct device *dev = icd->parent;
1674 struct v4l2_rect *cam_subrect = &cam->subrect;
1675 unsigned int scale_v, scale_h;
1676
1677 if (cam_subrect->width == cam->rect.width &&
1678 cam_subrect->height == cam->rect.height) {
1679 /* No sub-cropping */
1680 mf->width = pix->width;
1681 mf->height = pix->height;
1682 return;
1683 }
1684
1685 /* 1.-2. Current camera scales and subwin - cached. */
1686
1687 dev_geo(dev, "2: subwin %ux%u@%u:%u\n",
1688 cam_subrect->width, cam_subrect->height,
1689 cam_subrect->left, cam_subrect->top);
1690
1691 /*
1692 * 3. Calculate new combined scales from input sub-window to requested
1693 * user window.
1694 */
1695
1696 /*
1697 * TODO: CEU cannot scale images larger than VGA to smaller than SubQCIF
1698 * (128x96) or larger than VGA
1699 */
1700 scale_h = calc_generic_scale(cam_subrect->width, pix->width);
1701 scale_v = calc_generic_scale(cam_subrect->height, pix->height);
1702
1703 dev_geo(dev, "3: scales %u:%u\n", scale_h, scale_v);
1704
1705 /*
1706 * 4. Calculate desired client output window by applying combined scales
1707 * to client (real) input window.
1708 */
1709 mf->width = scale_down(cam->rect.width, scale_h);
1710 mf->height = scale_down(cam->rect.height, scale_v);
1711 }
1712
1713 /* Similar to set_crop multistage iterative algorithm */
1714 static int sh_mobile_ceu_set_fmt(struct soc_camera_device *icd,
1715 struct v4l2_format *f)
1716 {
1717 struct device *dev = icd->parent;
1718 struct soc_camera_host *ici = to_soc_camera_host(dev);
1719 struct sh_mobile_ceu_dev *pcdev = ici->priv;
1720 struct sh_mobile_ceu_cam *cam = icd->host_priv;
1721 struct v4l2_pix_format *pix = &f->fmt.pix;
1722 struct v4l2_mbus_framefmt mf;
1723 __u32 pixfmt = pix->pixelformat;
1724 const struct soc_camera_format_xlate *xlate;
1725 /* Keep Compiler Happy */
1726 unsigned int ceu_sub_width = 0, ceu_sub_height = 0;
1727 u16 scale_v, scale_h;
1728 int ret;
1729 bool image_mode;
1730 enum v4l2_field field;
1731
1732 switch (pix->field) {
1733 default:
1734 pix->field = V4L2_FIELD_NONE;
1735 /* fall-through */
1736 case V4L2_FIELD_INTERLACED_TB:
1737 case V4L2_FIELD_INTERLACED_BT:
1738 case V4L2_FIELD_NONE:
1739 field = pix->field;
1740 break;
1741 case V4L2_FIELD_INTERLACED:
1742 field = V4L2_FIELD_INTERLACED_TB;
1743 break;
1744 }
1745
1746 xlate = soc_camera_xlate_by_fourcc(icd, pixfmt);
1747 if (!xlate) {
1748 dev_warn(dev, "Format %x not found\n", pixfmt);
1749 return -EINVAL;
1750 }
1751
1752 /* 1.-4. Calculate desired client output geometry */
1753 calculate_client_output(icd, pix, &mf);
1754 mf.field = pix->field;
1755 mf.colorspace = pix->colorspace;
1756 mf.code = xlate->code;
1757
1758 switch (pixfmt) {
1759 case V4L2_PIX_FMT_NV12:
1760 case V4L2_PIX_FMT_NV21:
1761 case V4L2_PIX_FMT_NV16:
1762 case V4L2_PIX_FMT_NV61:
1763 image_mode = true;
1764 break;
1765 default:
1766 image_mode = false;
1767 }
1768
1769 dev_geo(dev, "S_FMT(pix=0x%x, fld 0x%x, code 0x%x, %ux%u)\n", pixfmt, mf.field, mf.code,
1770 pix->width, pix->height);
1771
1772 dev_geo(dev, "4: request camera output %ux%u\n", mf.width, mf.height);
1773
1774 /* 5. - 9. */
1775 ret = client_scale(icd, &mf, &ceu_sub_width, &ceu_sub_height,
1776 image_mode && V4L2_FIELD_NONE == field);
1777
1778 dev_geo(dev, "5-9: client scale return %d\n", ret);
1779
1780 /* Done with the camera. Now see if we can improve the result */
1781
1782 dev_geo(dev, "fmt %ux%u, requested %ux%u\n",
1783 mf.width, mf.height, pix->width, pix->height);
1784 if (ret < 0)
1785 return ret;
1786
1787 if (mf.code != xlate->code)
1788 return -EINVAL;
1789
1790 /* 9. Prepare CEU crop */
1791 cam->width = mf.width;
1792 cam->height = mf.height;
1793
1794 /* 10. Use CEU scaling to scale to the requested user window. */
1795
1796 /* We cannot scale up */
1797 if (pix->width > ceu_sub_width)
1798 ceu_sub_width = pix->width;
1799
1800 if (pix->height > ceu_sub_height)
1801 ceu_sub_height = pix->height;
1802
1803 pix->colorspace = mf.colorspace;
1804
1805 if (image_mode) {
1806 /* Scale pix->{width x height} down to width x height */
1807 scale_h = calc_scale(ceu_sub_width, &pix->width);
1808 scale_v = calc_scale(ceu_sub_height, &pix->height);
1809 } else {
1810 pix->width = ceu_sub_width;
1811 pix->height = ceu_sub_height;
1812 scale_h = 0;
1813 scale_v = 0;
1814 }
1815
1816 pcdev->cflcr = scale_h | (scale_v << 16);
1817
1818 /*
1819 * We have calculated CFLCR, the actual configuration will be performed
1820 * in sh_mobile_ceu_set_bus_param()
1821 */
1822
1823 dev_geo(dev, "10: W: %u : 0x%x = %u, H: %u : 0x%x = %u\n",
1824 ceu_sub_width, scale_h, pix->width,
1825 ceu_sub_height, scale_v, pix->height);
1826
1827 cam->code = xlate->code;
1828 icd->current_fmt = xlate;
1829
1830 pcdev->field = field;
1831 pcdev->image_mode = image_mode;
1832
1833 /* CFSZR requirement */
1834 pix->width &= ~3;
1835 pix->height &= ~3;
1836
1837 return 0;
1838 }
1839
1840 static int sh_mobile_ceu_try_fmt(struct soc_camera_device *icd,
1841 struct v4l2_format *f)
1842 {
1843 const struct soc_camera_format_xlate *xlate;
1844 struct v4l2_pix_format *pix = &f->fmt.pix;
1845 struct v4l2_subdev *sd = soc_camera_to_subdev(icd);
1846 struct v4l2_mbus_framefmt mf;
1847 __u32 pixfmt = pix->pixelformat;
1848 int width, height;
1849 int ret;
1850
1851 dev_geo(icd->parent, "TRY_FMT(pix=0x%x, %ux%u)\n",
1852 pixfmt, pix->width, pix->height);
1853
1854 xlate = soc_camera_xlate_by_fourcc(icd, pixfmt);
1855 if (!xlate) {
1856 dev_warn(icd->parent, "Format %x not found\n", pixfmt);
1857 return -EINVAL;
1858 }
1859
1860 /* FIXME: calculate using depth and bus width */
1861
1862 /* CFSZR requires height and width to be 4-pixel aligned */
1863 v4l_bound_align_image(&pix->width, 2, 2560, 2,
1864 &pix->height, 4, 1920, 2, 0);
1865
1866 width = pix->width;
1867 height = pix->height;
1868
1869 /* limit to sensor capabilities */
1870 mf.width = pix->width;
1871 mf.height = pix->height;
1872 mf.field = pix->field;
1873 mf.code = xlate->code;
1874 mf.colorspace = pix->colorspace;
1875
1876 ret = v4l2_device_call_until_err(sd->v4l2_dev, soc_camera_grp_id(icd),
1877 video, try_mbus_fmt, &mf);
1878 if (ret < 0)
1879 return ret;
1880
1881 pix->width = mf.width;
1882 pix->height = mf.height;
1883 pix->field = mf.field;
1884 pix->colorspace = mf.colorspace;
1885
1886 switch (pixfmt) {
1887 case V4L2_PIX_FMT_NV12:
1888 case V4L2_PIX_FMT_NV21:
1889 case V4L2_PIX_FMT_NV16:
1890 case V4L2_PIX_FMT_NV61:
1891 /* FIXME: check against rect_max after converting soc-camera */
1892 /* We can scale precisely, need a bigger image from camera */
1893 if (pix->width < width || pix->height < height) {
1894 /*
1895 * We presume, the sensor behaves sanely, i.e., if
1896 * requested a bigger rectangle, it will not return a
1897 * smaller one.
1898 */
1899 mf.width = 2560;
1900 mf.height = 1920;
1901 ret = v4l2_device_call_until_err(sd->v4l2_dev,
1902 soc_camera_grp_id(icd), video,
1903 try_mbus_fmt, &mf);
1904 if (ret < 0) {
1905 /* Shouldn't actually happen... */
1906 dev_err(icd->parent,
1907 "FIXME: client try_fmt() = %d\n", ret);
1908 return ret;
1909 }
1910 }
1911 /* We will scale exactly */
1912 if (mf.width > width)
1913 pix->width = width;
1914 if (mf.height > height)
1915 pix->height = height;
1916 }
1917
1918 pix->width &= ~3;
1919 pix->height &= ~3;
1920
1921 dev_geo(icd->parent, "%s(): return %d, fmt 0x%x, %ux%u\n",
1922 __func__, ret, pix->pixelformat, pix->width, pix->height);
1923
1924 return ret;
1925 }
1926
1927 static int sh_mobile_ceu_set_livecrop(struct soc_camera_device *icd,
1928 struct v4l2_crop *a)
1929 {
1930 struct v4l2_subdev *sd = soc_camera_to_subdev(icd);
1931 struct soc_camera_host *ici = to_soc_camera_host(icd->parent);
1932 struct sh_mobile_ceu_dev *pcdev = ici->priv;
1933 u32 out_width = icd->user_width, out_height = icd->user_height;
1934 int ret;
1935
1936 /* Freeze queue */
1937 pcdev->frozen = 1;
1938 /* Wait for frame */
1939 ret = wait_for_completion_interruptible(&pcdev->complete);
1940 /* Stop the client */
1941 ret = v4l2_subdev_call(sd, video, s_stream, 0);
1942 if (ret < 0)
1943 dev_warn(icd->parent,
1944 "Client failed to stop the stream: %d\n", ret);
1945 else
1946 /* Do the crop, if it fails, there's nothing more we can do */
1947 sh_mobile_ceu_set_crop(icd, a);
1948
1949 dev_geo(icd->parent, "Output after crop: %ux%u\n", icd->user_width, icd->user_height);
1950
1951 if (icd->user_width != out_width || icd->user_height != out_height) {
1952 struct v4l2_format f = {
1953 .type = V4L2_BUF_TYPE_VIDEO_CAPTURE,
1954 .fmt.pix = {
1955 .width = out_width,
1956 .height = out_height,
1957 .pixelformat = icd->current_fmt->host_fmt->fourcc,
1958 .field = pcdev->field,
1959 .colorspace = icd->colorspace,
1960 },
1961 };
1962 ret = sh_mobile_ceu_set_fmt(icd, &f);
1963 if (!ret && (out_width != f.fmt.pix.width ||
1964 out_height != f.fmt.pix.height))
1965 ret = -EINVAL;
1966 if (!ret) {
1967 icd->user_width = out_width & ~3;
1968 icd->user_height = out_height & ~3;
1969 ret = sh_mobile_ceu_set_bus_param(icd,
1970 icd->current_fmt->host_fmt->fourcc);
1971 }
1972 }
1973
1974 /* Thaw the queue */
1975 pcdev->frozen = 0;
1976 spin_lock_irq(&pcdev->lock);
1977 sh_mobile_ceu_capture(pcdev);
1978 spin_unlock_irq(&pcdev->lock);
1979 /* Start the client */
1980 ret = v4l2_subdev_call(sd, video, s_stream, 1);
1981 return ret;
1982 }
1983
1984 static unsigned int sh_mobile_ceu_poll(struct file *file, poll_table *pt)
1985 {
1986 struct soc_camera_device *icd = file->private_data;
1987
1988 return vb2_poll(&icd->vb2_vidq, file, pt);
1989 }
1990
1991 static int sh_mobile_ceu_querycap(struct soc_camera_host *ici,
1992 struct v4l2_capability *cap)
1993 {
1994 strlcpy(cap->card, "SuperH_Mobile_CEU", sizeof(cap->card));
1995 cap->capabilities = V4L2_CAP_VIDEO_CAPTURE | V4L2_CAP_STREAMING;
1996 return 0;
1997 }
1998
1999 static int sh_mobile_ceu_init_videobuf(struct vb2_queue *q,
2000 struct soc_camera_device *icd)
2001 {
2002 q->type = V4L2_BUF_TYPE_VIDEO_CAPTURE;
2003 q->io_modes = VB2_MMAP | VB2_USERPTR;
2004 q->drv_priv = icd;
2005 q->ops = &sh_mobile_ceu_videobuf_ops;
2006 q->mem_ops = &vb2_dma_contig_memops;
2007 q->buf_struct_size = sizeof(struct sh_mobile_ceu_buffer);
2008
2009 return vb2_queue_init(q);
2010 }
2011
2012 static struct soc_camera_host_ops sh_mobile_ceu_host_ops = {
2013 .owner = THIS_MODULE,
2014 .add = sh_mobile_ceu_add_device,
2015 .remove = sh_mobile_ceu_remove_device,
2016 .get_formats = sh_mobile_ceu_get_formats,
2017 .put_formats = sh_mobile_ceu_put_formats,
2018 .get_crop = sh_mobile_ceu_get_crop,
2019 .set_crop = sh_mobile_ceu_set_crop,
2020 .set_livecrop = sh_mobile_ceu_set_livecrop,
2021 .set_fmt = sh_mobile_ceu_set_fmt,
2022 .try_fmt = sh_mobile_ceu_try_fmt,
2023 .poll = sh_mobile_ceu_poll,
2024 .querycap = sh_mobile_ceu_querycap,
2025 .set_bus_param = sh_mobile_ceu_set_bus_param,
2026 .init_videobuf2 = sh_mobile_ceu_init_videobuf,
2027 };
2028
2029 struct bus_wait {
2030 struct notifier_block notifier;
2031 struct completion completion;
2032 struct device *dev;
2033 };
2034
2035 static int bus_notify(struct notifier_block *nb,
2036 unsigned long action, void *data)
2037 {
2038 struct device *dev = data;
2039 struct bus_wait *wait = container_of(nb, struct bus_wait, notifier);
2040
2041 if (wait->dev != dev)
2042 return NOTIFY_DONE;
2043
2044 switch (action) {
2045 case BUS_NOTIFY_UNBOUND_DRIVER:
2046 /* Protect from module unloading */
2047 wait_for_completion(&wait->completion);
2048 return NOTIFY_OK;
2049 }
2050 return NOTIFY_DONE;
2051 }
2052
2053 static int __devinit sh_mobile_ceu_probe(struct platform_device *pdev)
2054 {
2055 struct sh_mobile_ceu_dev *pcdev;
2056 struct resource *res;
2057 void __iomem *base;
2058 unsigned int irq;
2059 int err = 0;
2060 struct bus_wait wait = {
2061 .completion = COMPLETION_INITIALIZER_ONSTACK(wait.completion),
2062 .notifier.notifier_call = bus_notify,
2063 };
2064 struct sh_mobile_ceu_companion *csi2;
2065
2066 res = platform_get_resource(pdev, IORESOURCE_MEM, 0);
2067 irq = platform_get_irq(pdev, 0);
2068 if (!res || (int)irq <= 0) {
2069 dev_err(&pdev->dev, "Not enough CEU platform resources.\n");
2070 err = -ENODEV;
2071 goto exit;
2072 }
2073
2074 pcdev = kzalloc(sizeof(*pcdev), GFP_KERNEL);
2075 if (!pcdev) {
2076 dev_err(&pdev->dev, "Could not allocate pcdev\n");
2077 err = -ENOMEM;
2078 goto exit;
2079 }
2080
2081 INIT_LIST_HEAD(&pcdev->capture);
2082 spin_lock_init(&pcdev->lock);
2083 init_completion(&pcdev->complete);
2084
2085 pcdev->pdata = pdev->dev.platform_data;
2086 if (!pcdev->pdata) {
2087 err = -EINVAL;
2088 dev_err(&pdev->dev, "CEU platform data not set.\n");
2089 goto exit_kfree;
2090 }
2091
2092 base = ioremap_nocache(res->start, resource_size(res));
2093 if (!base) {
2094 err = -ENXIO;
2095 dev_err(&pdev->dev, "Unable to ioremap CEU registers.\n");
2096 goto exit_kfree;
2097 }
2098
2099 pcdev->irq = irq;
2100 pcdev->base = base;
2101 pcdev->video_limit = 0; /* only enabled if second resource exists */
2102
2103 res = platform_get_resource(pdev, IORESOURCE_MEM, 1);
2104 if (res) {
2105 err = dma_declare_coherent_memory(&pdev->dev, res->start,
2106 res->start,
2107 resource_size(res),
2108 DMA_MEMORY_MAP |
2109 DMA_MEMORY_EXCLUSIVE);
2110 if (!err) {
2111 dev_err(&pdev->dev, "Unable to declare CEU memory.\n");
2112 err = -ENXIO;
2113 goto exit_iounmap;
2114 }
2115
2116 pcdev->video_limit = resource_size(res);
2117 }
2118
2119 /* request irq */
2120 err = request_irq(pcdev->irq, sh_mobile_ceu_irq, IRQF_DISABLED,
2121 dev_name(&pdev->dev), pcdev);
2122 if (err) {
2123 dev_err(&pdev->dev, "Unable to register CEU interrupt.\n");
2124 goto exit_release_mem;
2125 }
2126
2127 pm_suspend_ignore_children(&pdev->dev, true);
2128 pm_runtime_enable(&pdev->dev);
2129 pm_runtime_resume(&pdev->dev);
2130
2131 pcdev->ici.priv = pcdev;
2132 pcdev->ici.v4l2_dev.dev = &pdev->dev;
2133 pcdev->ici.nr = pdev->id;
2134 pcdev->ici.drv_name = dev_name(&pdev->dev);
2135 pcdev->ici.ops = &sh_mobile_ceu_host_ops;
2136
2137 pcdev->alloc_ctx = vb2_dma_contig_init_ctx(&pdev->dev);
2138 if (IS_ERR(pcdev->alloc_ctx)) {
2139 err = PTR_ERR(pcdev->alloc_ctx);
2140 goto exit_free_clk;
2141 }
2142
2143 err = soc_camera_host_register(&pcdev->ici);
2144 if (err)
2145 goto exit_free_ctx;
2146
2147 /* CSI2 interfacing */
2148 csi2 = pcdev->pdata->csi2;
2149 if (csi2) {
2150 struct platform_device *csi2_pdev =
2151 platform_device_alloc("sh-mobile-csi2", csi2->id);
2152 struct sh_csi2_pdata *csi2_pdata = csi2->platform_data;
2153
2154 if (!csi2_pdev) {
2155 err = -ENOMEM;
2156 goto exit_host_unregister;
2157 }
2158
2159 pcdev->csi2_pdev = csi2_pdev;
2160
2161 err = platform_device_add_data(csi2_pdev, csi2_pdata, sizeof(*csi2_pdata));
2162 if (err < 0)
2163 goto exit_pdev_put;
2164
2165 csi2_pdata = csi2_pdev->dev.platform_data;
2166 csi2_pdata->v4l2_dev = &pcdev->ici.v4l2_dev;
2167
2168 csi2_pdev->resource = csi2->resource;
2169 csi2_pdev->num_resources = csi2->num_resources;
2170
2171 err = platform_device_add(csi2_pdev);
2172 if (err < 0)
2173 goto exit_pdev_put;
2174
2175 wait.dev = &csi2_pdev->dev;
2176
2177 err = bus_register_notifier(&platform_bus_type, &wait.notifier);
2178 if (err < 0)
2179 goto exit_pdev_unregister;
2180
2181 /*
2182 * From this point the driver module will not unload, until
2183 * we complete the completion.
2184 */
2185
2186 if (!csi2_pdev->dev.driver) {
2187 complete(&wait.completion);
2188 /* Either too late, or probing failed */
2189 bus_unregister_notifier(&platform_bus_type, &wait.notifier);
2190 err = -ENXIO;
2191 goto exit_pdev_unregister;
2192 }
2193
2194 /*
2195 * The module is still loaded, in the worst case it is hanging
2196 * in device release on our completion. So, _now_ dereferencing
2197 * the "owner" is safe!
2198 */
2199
2200 err = try_module_get(csi2_pdev->dev.driver->owner);
2201
2202 /* Let notifier complete, if it has been locked */
2203 complete(&wait.completion);
2204 bus_unregister_notifier(&platform_bus_type, &wait.notifier);
2205 if (!err) {
2206 err = -ENODEV;
2207 goto exit_pdev_unregister;
2208 }
2209 }
2210
2211 return 0;
2212
2213 exit_pdev_unregister:
2214 platform_device_del(pcdev->csi2_pdev);
2215 exit_pdev_put:
2216 pcdev->csi2_pdev->resource = NULL;
2217 platform_device_put(pcdev->csi2_pdev);
2218 exit_host_unregister:
2219 soc_camera_host_unregister(&pcdev->ici);
2220 exit_free_ctx:
2221 vb2_dma_contig_cleanup_ctx(pcdev->alloc_ctx);
2222 exit_free_clk:
2223 pm_runtime_disable(&pdev->dev);
2224 free_irq(pcdev->irq, pcdev);
2225 exit_release_mem:
2226 if (platform_get_resource(pdev, IORESOURCE_MEM, 1))
2227 dma_release_declared_memory(&pdev->dev);
2228 exit_iounmap:
2229 iounmap(base);
2230 exit_kfree:
2231 kfree(pcdev);
2232 exit:
2233 return err;
2234 }
2235
2236 static int __devexit sh_mobile_ceu_remove(struct platform_device *pdev)
2237 {
2238 struct soc_camera_host *soc_host = to_soc_camera_host(&pdev->dev);
2239 struct sh_mobile_ceu_dev *pcdev = container_of(soc_host,
2240 struct sh_mobile_ceu_dev, ici);
2241 struct platform_device *csi2_pdev = pcdev->csi2_pdev;
2242
2243 soc_camera_host_unregister(soc_host);
2244 pm_runtime_disable(&pdev->dev);
2245 free_irq(pcdev->irq, pcdev);
2246 if (platform_get_resource(pdev, IORESOURCE_MEM, 1))
2247 dma_release_declared_memory(&pdev->dev);
2248 iounmap(pcdev->base);
2249 vb2_dma_contig_cleanup_ctx(pcdev->alloc_ctx);
2250 if (csi2_pdev && csi2_pdev->dev.driver) {
2251 struct module *csi2_drv = csi2_pdev->dev.driver->owner;
2252 platform_device_del(csi2_pdev);
2253 csi2_pdev->resource = NULL;
2254 platform_device_put(csi2_pdev);
2255 module_put(csi2_drv);
2256 }
2257 kfree(pcdev);
2258
2259 return 0;
2260 }
2261
2262 static int sh_mobile_ceu_runtime_nop(struct device *dev)
2263 {
2264 /* Runtime PM callback shared between ->runtime_suspend()
2265 * and ->runtime_resume(). Simply returns success.
2266 *
2267 * This driver re-initializes all registers after
2268 * pm_runtime_get_sync() anyway so there is no need
2269 * to save and restore registers here.
2270 */
2271 return 0;
2272 }
2273
2274 static const struct dev_pm_ops sh_mobile_ceu_dev_pm_ops = {
2275 .runtime_suspend = sh_mobile_ceu_runtime_nop,
2276 .runtime_resume = sh_mobile_ceu_runtime_nop,
2277 };
2278
2279 static struct platform_driver sh_mobile_ceu_driver = {
2280 .driver = {
2281 .name = "sh_mobile_ceu",
2282 .pm = &sh_mobile_ceu_dev_pm_ops,
2283 },
2284 .probe = sh_mobile_ceu_probe,
2285 .remove = __devexit_p(sh_mobile_ceu_remove),
2286 };
2287
2288 static int __init sh_mobile_ceu_init(void)
2289 {
2290 /* Whatever return code */
2291 request_module("sh_mobile_csi2");
2292 return platform_driver_register(&sh_mobile_ceu_driver);
2293 }
2294
2295 static void __exit sh_mobile_ceu_exit(void)
2296 {
2297 platform_driver_unregister(&sh_mobile_ceu_driver);
2298 }
2299
2300 module_init(sh_mobile_ceu_init);
2301 module_exit(sh_mobile_ceu_exit);
2302
2303 MODULE_DESCRIPTION("SuperH Mobile CEU driver");
2304 MODULE_AUTHOR("Magnus Damm");
2305 MODULE_LICENSE("GPL");
2306 MODULE_VERSION("0.0.6");
2307 MODULE_ALIAS("platform:sh_mobile_ceu");
Linux 2.6 ibm-acpi/thinkpad-acpi driver git tree