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Merge branch 'for-linus' of git://git.infradead.org/users/sameo/mfd-2.6
[linux-btrfs-devel.git] / drivers / media / video / sh_mobile_ceu_camera.c
blobe54089802b6b906027b36369984f126d9d8e8830
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 scaled by the CEU camera output */
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 unsigned long make_bus_param(struct sh_mobile_ceu_dev *pcdev)
148 {
149 unsigned long flags;
150
151 flags = SOCAM_MASTER |
152 SOCAM_PCLK_SAMPLE_RISING |
153 SOCAM_HSYNC_ACTIVE_HIGH |
154 SOCAM_HSYNC_ACTIVE_LOW |
155 SOCAM_VSYNC_ACTIVE_HIGH |
156 SOCAM_VSYNC_ACTIVE_LOW |
157 SOCAM_DATA_ACTIVE_HIGH;
158
159 if (pcdev->pdata->flags & SH_CEU_FLAG_USE_8BIT_BUS)
160 flags |= SOCAM_DATAWIDTH_8;
161
162 if (pcdev->pdata->flags & SH_CEU_FLAG_USE_16BIT_BUS)
163 flags |= SOCAM_DATAWIDTH_16;
164
165 if (flags & SOCAM_DATAWIDTH_MASK)
166 return flags;
167
168 return 0;
169 }
170
171 static void ceu_write(struct sh_mobile_ceu_dev *priv,
172 unsigned long reg_offs, u32 data)
173 {
174 iowrite32(data, priv->base + reg_offs);
175 }
176
177 static u32 ceu_read(struct sh_mobile_ceu_dev *priv, unsigned long reg_offs)
178 {
179 return ioread32(priv->base + reg_offs);
180 }
181
182 static int sh_mobile_ceu_soft_reset(struct sh_mobile_ceu_dev *pcdev)
183 {
184 int i, success = 0;
185 struct soc_camera_device *icd = pcdev->icd;
186
187 ceu_write(pcdev, CAPSR, 1 << 16); /* reset */
188
189 /* wait CSTSR.CPTON bit */
190 for (i = 0; i < 1000; i++) {
191 if (!(ceu_read(pcdev, CSTSR) & 1)) {
192 success++;
193 break;
194 }
195 udelay(1);
196 }
197
198 /* wait CAPSR.CPKIL bit */
199 for (i = 0; i < 1000; i++) {
200 if (!(ceu_read(pcdev, CAPSR) & (1 << 16))) {
201 success++;
202 break;
203 }
204 udelay(1);
205 }
206
207
208 if (2 != success) {
209 dev_warn(icd->pdev, "soft reset time out\n");
210 return -EIO;
211 }
212
213 return 0;
214 }
215
216 /*
217 * Videobuf operations
218 */
219 static int sh_mobile_ceu_videobuf_setup(struct vb2_queue *vq,
220 unsigned int *count, unsigned int *num_planes,
221 unsigned long sizes[], void *alloc_ctxs[])
222 {
223 struct soc_camera_device *icd = container_of(vq, struct soc_camera_device, vb2_vidq);
224 struct soc_camera_host *ici = to_soc_camera_host(icd->parent);
225 struct sh_mobile_ceu_dev *pcdev = ici->priv;
226 int bytes_per_line = soc_mbus_bytes_per_line(icd->user_width,
227 icd->current_fmt->host_fmt);
228
229 if (bytes_per_line < 0)
230 return bytes_per_line;
231
232 *num_planes = 1;
233
234 pcdev->sequence = 0;
235 sizes[0] = bytes_per_line * icd->user_height;
236 alloc_ctxs[0] = pcdev->alloc_ctx;
237
238 if (!*count)
239 *count = 2;
240
241 if (pcdev->video_limit) {
242 if (PAGE_ALIGN(sizes[0]) * *count > pcdev->video_limit)
243 *count = pcdev->video_limit / PAGE_ALIGN(sizes[0]);
244 }
245
246 dev_dbg(icd->parent, "count=%d, size=%lu\n", *count, sizes[0]);
247
248 return 0;
249 }
250
251 #define CEU_CETCR_MAGIC 0x0317f313 /* acknowledge magical interrupt sources */
252 #define CEU_CETCR_IGRW (1 << 4) /* prohibited register access interrupt bit */
253 #define CEU_CEIER_CPEIE (1 << 0) /* one-frame capture end interrupt */
254 #define CEU_CEIER_VBP (1 << 20) /* vbp error */
255 #define CEU_CAPCR_CTNCP (1 << 16) /* continuous capture mode (if set) */
256 #define CEU_CEIER_MASK (CEU_CEIER_CPEIE | CEU_CEIER_VBP)
257
258
259 /*
260 * return value doesn't reflex the success/failure to queue the new buffer,
261 * but rather the status of the previous buffer.
262 */
263 static int sh_mobile_ceu_capture(struct sh_mobile_ceu_dev *pcdev)
264 {
265 struct soc_camera_device *icd = pcdev->icd;
266 dma_addr_t phys_addr_top, phys_addr_bottom;
267 unsigned long top1, top2;
268 unsigned long bottom1, bottom2;
269 u32 status;
270 int ret = 0;
271
272 /*
273 * The hardware is _very_ picky about this sequence. Especially
274 * the CEU_CETCR_MAGIC value. It seems like we need to acknowledge
275 * several not-so-well documented interrupt sources in CETCR.
276 */
277 ceu_write(pcdev, CEIER, ceu_read(pcdev, CEIER) & ~CEU_CEIER_MASK);
278 status = ceu_read(pcdev, CETCR);
279 ceu_write(pcdev, CETCR, ~status & CEU_CETCR_MAGIC);
280 if (!pcdev->frozen)
281 ceu_write(pcdev, CEIER, ceu_read(pcdev, CEIER) | CEU_CEIER_MASK);
282 ceu_write(pcdev, CAPCR, ceu_read(pcdev, CAPCR) & ~CEU_CAPCR_CTNCP);
283 ceu_write(pcdev, CETCR, CEU_CETCR_MAGIC ^ CEU_CETCR_IGRW);
284
285 /*
286 * When a VBP interrupt occurs, a capture end interrupt does not occur
287 * and the image of that frame is not captured correctly. So, soft reset
288 * is needed here.
289 */
290 if (status & CEU_CEIER_VBP) {
291 sh_mobile_ceu_soft_reset(pcdev);
292 ret = -EIO;
293 }
294
295 if (pcdev->frozen) {
296 complete(&pcdev->complete);
297 return ret;
298 }
299
300 if (!pcdev->active)
301 return ret;
302
303 if (V4L2_FIELD_INTERLACED_BT == pcdev->field) {
304 top1 = CDBYR;
305 top2 = CDBCR;
306 bottom1 = CDAYR;
307 bottom2 = CDACR;
308 } else {
309 top1 = CDAYR;
310 top2 = CDACR;
311 bottom1 = CDBYR;
312 bottom2 = CDBCR;
313 }
314
315 phys_addr_top = vb2_dma_contig_plane_paddr(pcdev->active, 0);
316
317 ceu_write(pcdev, top1, phys_addr_top);
318 if (V4L2_FIELD_NONE != pcdev->field) {
319 phys_addr_bottom = phys_addr_top + icd->user_width;
320 ceu_write(pcdev, bottom1, phys_addr_bottom);
321 }
322
323 switch (icd->current_fmt->host_fmt->fourcc) {
324 case V4L2_PIX_FMT_NV12:
325 case V4L2_PIX_FMT_NV21:
326 case V4L2_PIX_FMT_NV16:
327 case V4L2_PIX_FMT_NV61:
328 phys_addr_top += icd->user_width *
329 icd->user_height;
330 ceu_write(pcdev, top2, phys_addr_top);
331 if (V4L2_FIELD_NONE != pcdev->field) {
332 phys_addr_bottom = phys_addr_top + icd->user_width;
333 ceu_write(pcdev, bottom2, phys_addr_bottom);
334 }
335 }
336
337 ceu_write(pcdev, CAPSR, 0x1); /* start capture */
338
339 return ret;
340 }
341
342 static int sh_mobile_ceu_videobuf_prepare(struct vb2_buffer *vb)
343 {
344 struct soc_camera_device *icd = container_of(vb->vb2_queue, struct soc_camera_device, vb2_vidq);
345 struct sh_mobile_ceu_buffer *buf;
346 int bytes_per_line = soc_mbus_bytes_per_line(icd->user_width,
347 icd->current_fmt->host_fmt);
348 unsigned long size;
349
350 if (bytes_per_line < 0)
351 return bytes_per_line;
352
353 buf = to_ceu_vb(vb);
354
355 dev_dbg(icd->parent, "%s (vb=0x%p) 0x%p %lu\n", __func__,
356 vb, vb2_plane_vaddr(vb, 0), vb2_get_plane_payload(vb, 0));
357
358 /* Added list head initialization on alloc */
359 WARN(!list_empty(&buf->queue), "Buffer %p on queue!\n", vb);
360
361 #ifdef DEBUG
362 /*
363 * This can be useful if you want to see if we actually fill
364 * the buffer with something
365 */
366 if (vb2_plane_vaddr(vb, 0))
367 memset(vb2_plane_vaddr(vb, 0), 0xaa, vb2_get_plane_payload(vb, 0));
368 #endif
369
370 BUG_ON(NULL == icd->current_fmt);
371
372 size = icd->user_height * bytes_per_line;
373
374 if (vb2_plane_size(vb, 0) < size) {
375 dev_err(icd->parent, "Buffer too small (%lu < %lu)\n",
376 vb2_plane_size(vb, 0), size);
377 return -ENOBUFS;
378 }
379
380 vb2_set_plane_payload(vb, 0, size);
381
382 return 0;
383 }
384
385 static void sh_mobile_ceu_videobuf_queue(struct vb2_buffer *vb)
386 {
387 struct soc_camera_device *icd = container_of(vb->vb2_queue, struct soc_camera_device, vb2_vidq);
388 struct soc_camera_host *ici = to_soc_camera_host(icd->parent);
389 struct sh_mobile_ceu_dev *pcdev = ici->priv;
390 struct sh_mobile_ceu_buffer *buf = to_ceu_vb(vb);
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 spin_lock_irq(&pcdev->lock);
396 list_add_tail(&buf->queue, &pcdev->capture);
397
398 if (!pcdev->active) {
399 /*
400 * Because there were no active buffer at this moment,
401 * we are not interested in the return value of
402 * sh_mobile_ceu_capture here.
403 */
404 pcdev->active = vb;
405 sh_mobile_ceu_capture(pcdev);
406 }
407 spin_unlock_irq(&pcdev->lock);
408 }
409
410 static void sh_mobile_ceu_videobuf_release(struct vb2_buffer *vb)
411 {
412 struct soc_camera_device *icd = container_of(vb->vb2_queue, struct soc_camera_device, vb2_vidq);
413 struct soc_camera_host *ici = to_soc_camera_host(icd->parent);
414 struct sh_mobile_ceu_buffer *buf = to_ceu_vb(vb);
415 struct sh_mobile_ceu_dev *pcdev = ici->priv;
416
417 spin_lock_irq(&pcdev->lock);
418
419 if (pcdev->active == vb) {
420 /* disable capture (release DMA buffer), reset */
421 ceu_write(pcdev, CAPSR, 1 << 16);
422 pcdev->active = NULL;
423 }
424
425 /*
426 * Doesn't hurt also if the list is empty, but it hurts, if queuing the
427 * buffer failed, and .buf_init() hasn't been called
428 */
429 if (buf->queue.next)
430 list_del_init(&buf->queue);
431
432 spin_unlock_irq(&pcdev->lock);
433 }
434
435 static int sh_mobile_ceu_videobuf_init(struct vb2_buffer *vb)
436 {
437 /* This is for locking debugging only */
438 INIT_LIST_HEAD(&to_ceu_vb(vb)->queue);
439 return 0;
440 }
441
442 static int sh_mobile_ceu_stop_streaming(struct vb2_queue *q)
443 {
444 struct soc_camera_device *icd = container_of(q, struct soc_camera_device, vb2_vidq);
445 struct soc_camera_host *ici = to_soc_camera_host(icd->parent);
446 struct sh_mobile_ceu_dev *pcdev = ici->priv;
447 struct list_head *buf_head, *tmp;
448
449 spin_lock_irq(&pcdev->lock);
450
451 pcdev->active = NULL;
452
453 list_for_each_safe(buf_head, tmp, &pcdev->capture)
454 list_del_init(buf_head);
455
456 spin_unlock_irq(&pcdev->lock);
457
458 return sh_mobile_ceu_soft_reset(pcdev);
459 }
460
461 static struct vb2_ops sh_mobile_ceu_videobuf_ops = {
462 .queue_setup = sh_mobile_ceu_videobuf_setup,
463 .buf_prepare = sh_mobile_ceu_videobuf_prepare,
464 .buf_queue = sh_mobile_ceu_videobuf_queue,
465 .buf_cleanup = sh_mobile_ceu_videobuf_release,
466 .buf_init = sh_mobile_ceu_videobuf_init,
467 .wait_prepare = soc_camera_unlock,
468 .wait_finish = soc_camera_lock,
469 .stop_streaming = sh_mobile_ceu_stop_streaming,
470 };
471
472 static irqreturn_t sh_mobile_ceu_irq(int irq, void *data)
473 {
474 struct sh_mobile_ceu_dev *pcdev = data;
475 struct vb2_buffer *vb;
476 int ret;
477
478 spin_lock(&pcdev->lock);
479
480 vb = pcdev->active;
481 if (!vb)
482 /* Stale interrupt from a released buffer */
483 goto out;
484
485 list_del_init(&to_ceu_vb(vb)->queue);
486
487 if (!list_empty(&pcdev->capture))
488 pcdev->active = &list_entry(pcdev->capture.next,
489 struct sh_mobile_ceu_buffer, queue)->vb;
490 else
491 pcdev->active = NULL;
492
493 ret = sh_mobile_ceu_capture(pcdev);
494 do_gettimeofday(&vb->v4l2_buf.timestamp);
495 if (!ret) {
496 vb->v4l2_buf.field = pcdev->field;
497 vb->v4l2_buf.sequence = pcdev->sequence++;
498 }
499 vb2_buffer_done(vb, ret < 0 ? VB2_BUF_STATE_ERROR : VB2_BUF_STATE_DONE);
500
501 out:
502 spin_unlock(&pcdev->lock);
503
504 return IRQ_HANDLED;
505 }
506
507 static struct v4l2_subdev *find_csi2(struct sh_mobile_ceu_dev *pcdev)
508 {
509 struct v4l2_subdev *sd;
510
511 if (!pcdev->csi2_pdev)
512 return NULL;
513
514 v4l2_device_for_each_subdev(sd, &pcdev->ici.v4l2_dev)
515 if (&pcdev->csi2_pdev->dev == v4l2_get_subdevdata(sd))
516 return sd;
517
518 return NULL;
519 }
520
521 /* Called with .video_lock held */
522 static int sh_mobile_ceu_add_device(struct soc_camera_device *icd)
523 {
524 struct soc_camera_host *ici = to_soc_camera_host(icd->parent);
525 struct sh_mobile_ceu_dev *pcdev = ici->priv;
526 struct v4l2_subdev *csi2_sd;
527 int ret;
528
529 if (pcdev->icd)
530 return -EBUSY;
531
532 dev_info(icd->parent,
533 "SuperH Mobile CEU driver attached to camera %d\n",
534 icd->devnum);
535
536 pm_runtime_get_sync(ici->v4l2_dev.dev);
537
538 ret = sh_mobile_ceu_soft_reset(pcdev);
539
540 csi2_sd = find_csi2(pcdev);
541
542 ret = v4l2_subdev_call(csi2_sd, core, s_power, 1);
543 if (ret != -ENODEV && ret != -ENOIOCTLCMD && ret < 0) {
544 pm_runtime_put_sync(ici->v4l2_dev.dev);
545 } else {
546 pcdev->icd = icd;
547 ret = 0;
548 }
549
550 return ret;
551 }
552
553 /* Called with .video_lock held */
554 static void sh_mobile_ceu_remove_device(struct soc_camera_device *icd)
555 {
556 struct soc_camera_host *ici = to_soc_camera_host(icd->parent);
557 struct sh_mobile_ceu_dev *pcdev = ici->priv;
558 struct v4l2_subdev *csi2_sd = find_csi2(pcdev);
559
560 BUG_ON(icd != pcdev->icd);
561
562 v4l2_subdev_call(csi2_sd, core, s_power, 0);
563 /* disable capture, disable interrupts */
564 ceu_write(pcdev, CEIER, 0);
565 sh_mobile_ceu_soft_reset(pcdev);
566
567 /* make sure active buffer is canceled */
568 spin_lock_irq(&pcdev->lock);
569 if (pcdev->active) {
570 list_del_init(&to_ceu_vb(pcdev->active)->queue);
571 vb2_buffer_done(pcdev->active, VB2_BUF_STATE_ERROR);
572 pcdev->active = NULL;
573 }
574 spin_unlock_irq(&pcdev->lock);
575
576 pm_runtime_put_sync(ici->v4l2_dev.dev);
577
578 dev_info(icd->parent,
579 "SuperH Mobile CEU driver detached from camera %d\n",
580 icd->devnum);
581
582 pcdev->icd = NULL;
583 }
584
585 /*
586 * See chapter 29.4.12 "Capture Filter Control Register (CFLCR)"
587 * in SH7722 Hardware Manual
588 */
589 static unsigned int size_dst(unsigned int src, unsigned int scale)
590 {
591 unsigned int mant_pre = scale >> 12;
592 if (!src || !scale)
593 return src;
594 return ((mant_pre + 2 * (src - 1)) / (2 * mant_pre) - 1) *
595 mant_pre * 4096 / scale + 1;
596 }
597
598 static u16 calc_scale(unsigned int src, unsigned int *dst)
599 {
600 u16 scale;
601
602 if (src == *dst)
603 return 0;
604
605 scale = (src * 4096 / *dst) & ~7;
606
607 while (scale > 4096 && size_dst(src, scale) < *dst)
608 scale -= 8;
609
610 *dst = size_dst(src, scale);
611
612 return scale;
613 }
614
615 /* rect is guaranteed to not exceed the scaled camera rectangle */
616 static void sh_mobile_ceu_set_rect(struct soc_camera_device *icd)
617 {
618 struct soc_camera_host *ici = to_soc_camera_host(icd->parent);
619 struct sh_mobile_ceu_cam *cam = icd->host_priv;
620 struct sh_mobile_ceu_dev *pcdev = ici->priv;
621 unsigned int height, width, cdwdr_width, in_width, in_height;
622 unsigned int left_offset, top_offset;
623 u32 camor;
624
625 dev_geo(icd->parent, "Crop %ux%u@%u:%u\n",
626 icd->user_width, icd->user_height, cam->ceu_left, cam->ceu_top);
627
628 left_offset = cam->ceu_left;
629 top_offset = cam->ceu_top;
630
631 /* CEU cropping (CFSZR) is applied _after_ the scaling filter (CFLCR) */
632 if (pcdev->image_mode) {
633 in_width = cam->width;
634 if (!pcdev->is_16bit) {
635 in_width *= 2;
636 left_offset *= 2;
637 }
638 width = icd->user_width;
639 cdwdr_width = icd->user_width;
640 } else {
641 int bytes_per_line = soc_mbus_bytes_per_line(icd->user_width,
642 icd->current_fmt->host_fmt);
643 unsigned int w_factor;
644
645 width = icd->user_width;
646
647 switch (icd->current_fmt->host_fmt->packing) {
648 case SOC_MBUS_PACKING_2X8_PADHI:
649 w_factor = 2;
650 break;
651 default:
652 w_factor = 1;
653 }
654
655 in_width = cam->width * w_factor;
656 left_offset = left_offset * w_factor;
657
658 if (bytes_per_line < 0)
659 cdwdr_width = icd->user_width;
660 else
661 cdwdr_width = bytes_per_line;
662 }
663
664 height = icd->user_height;
665 in_height = cam->height;
666 if (V4L2_FIELD_NONE != pcdev->field) {
667 height /= 2;
668 in_height /= 2;
669 top_offset /= 2;
670 cdwdr_width *= 2;
671 }
672
673 /* CSI2 special configuration */
674 if (pcdev->pdata->csi2) {
675 in_width = ((in_width - 2) * 2);
676 left_offset *= 2;
677 }
678
679 /* Set CAMOR, CAPWR, CFSZR, take care of CDWDR */
680 camor = left_offset | (top_offset << 16);
681
682 dev_geo(icd->parent,
683 "CAMOR 0x%x, CAPWR 0x%x, CFSZR 0x%x, CDWDR 0x%x\n", camor,
684 (in_height << 16) | in_width, (height << 16) | width,
685 cdwdr_width);
686
687 ceu_write(pcdev, CAMOR, camor);
688 ceu_write(pcdev, CAPWR, (in_height << 16) | in_width);
689 ceu_write(pcdev, CFSZR, (height << 16) | width);
690 ceu_write(pcdev, CDWDR, cdwdr_width);
691 }
692
693 static u32 capture_save_reset(struct sh_mobile_ceu_dev *pcdev)
694 {
695 u32 capsr = ceu_read(pcdev, CAPSR);
696 ceu_write(pcdev, CAPSR, 1 << 16); /* reset, stop capture */
697 return capsr;
698 }
699
700 static void capture_restore(struct sh_mobile_ceu_dev *pcdev, u32 capsr)
701 {
702 unsigned long timeout = jiffies + 10 * HZ;
703
704 /*
705 * Wait until the end of the current frame. It can take a long time,
706 * but if it has been aborted by a CAPSR reset, it shoule exit sooner.
707 */
708 while ((ceu_read(pcdev, CSTSR) & 1) && time_before(jiffies, timeout))
709 msleep(1);
710
711 if (time_after(jiffies, timeout)) {
712 dev_err(pcdev->ici.v4l2_dev.dev,
713 "Timeout waiting for frame end! Interface problem?\n");
714 return;
715 }
716
717 /* Wait until reset clears, this shall not hang... */
718 while (ceu_read(pcdev, CAPSR) & (1 << 16))
719 udelay(10);
720
721 /* Anything to restore? */
722 if (capsr & ~(1 << 16))
723 ceu_write(pcdev, CAPSR, capsr);
724 }
725
726 /* Capture is not running, no interrupts, no locking needed */
727 static int sh_mobile_ceu_set_bus_param(struct soc_camera_device *icd,
728 __u32 pixfmt)
729 {
730 struct soc_camera_host *ici = to_soc_camera_host(icd->parent);
731 struct sh_mobile_ceu_dev *pcdev = ici->priv;
732 int ret;
733 unsigned long camera_flags, common_flags, value;
734 int yuv_lineskip;
735 struct sh_mobile_ceu_cam *cam = icd->host_priv;
736 u32 capsr = capture_save_reset(pcdev);
737
738 camera_flags = icd->ops->query_bus_param(icd);
739 common_flags = soc_camera_bus_param_compatible(camera_flags,
740 make_bus_param(pcdev));
741 if (!common_flags)
742 return -EINVAL;
743
744 /* Make choises, based on platform preferences */
745 if ((common_flags & SOCAM_HSYNC_ACTIVE_HIGH) &&
746 (common_flags & SOCAM_HSYNC_ACTIVE_LOW)) {
747 if (pcdev->pdata->flags & SH_CEU_FLAG_HSYNC_LOW)
748 common_flags &= ~SOCAM_HSYNC_ACTIVE_HIGH;
749 else
750 common_flags &= ~SOCAM_HSYNC_ACTIVE_LOW;
751 }
752
753 if ((common_flags & SOCAM_VSYNC_ACTIVE_HIGH) &&
754 (common_flags & SOCAM_VSYNC_ACTIVE_LOW)) {
755 if (pcdev->pdata->flags & SH_CEU_FLAG_VSYNC_LOW)
756 common_flags &= ~SOCAM_VSYNC_ACTIVE_HIGH;
757 else
758 common_flags &= ~SOCAM_VSYNC_ACTIVE_LOW;
759 }
760
761 ret = icd->ops->set_bus_param(icd, common_flags);
762 if (ret < 0)
763 return ret;
764
765 switch (common_flags & SOCAM_DATAWIDTH_MASK) {
766 case SOCAM_DATAWIDTH_8:
767 pcdev->is_16bit = 0;
768 break;
769 case SOCAM_DATAWIDTH_16:
770 pcdev->is_16bit = 1;
771 break;
772 default:
773 return -EINVAL;
774 }
775
776 ceu_write(pcdev, CRCNTR, 0);
777 ceu_write(pcdev, CRCMPR, 0);
778
779 value = 0x00000010; /* data fetch by default */
780 yuv_lineskip = 0;
781
782 switch (icd->current_fmt->host_fmt->fourcc) {
783 case V4L2_PIX_FMT_NV12:
784 case V4L2_PIX_FMT_NV21:
785 yuv_lineskip = 1; /* skip for NV12/21, no skip for NV16/61 */
786 /* fall-through */
787 case V4L2_PIX_FMT_NV16:
788 case V4L2_PIX_FMT_NV61:
789 switch (cam->code) {
790 case V4L2_MBUS_FMT_UYVY8_2X8:
791 value = 0x00000000; /* Cb0, Y0, Cr0, Y1 */
792 break;
793 case V4L2_MBUS_FMT_VYUY8_2X8:
794 value = 0x00000100; /* Cr0, Y0, Cb0, Y1 */
795 break;
796 case V4L2_MBUS_FMT_YUYV8_2X8:
797 value = 0x00000200; /* Y0, Cb0, Y1, Cr0 */
798 break;
799 case V4L2_MBUS_FMT_YVYU8_2X8:
800 value = 0x00000300; /* Y0, Cr0, Y1, Cb0 */
801 break;
802 default:
803 BUG();
804 }
805 }
806
807 if (icd->current_fmt->host_fmt->fourcc == V4L2_PIX_FMT_NV21 ||
808 icd->current_fmt->host_fmt->fourcc == V4L2_PIX_FMT_NV61)
809 value ^= 0x00000100; /* swap U, V to change from NV1x->NVx1 */
810
811 value |= common_flags & SOCAM_VSYNC_ACTIVE_LOW ? 1 << 1 : 0;
812 value |= common_flags & SOCAM_HSYNC_ACTIVE_LOW ? 1 << 0 : 0;
813 value |= pcdev->is_16bit ? 1 << 12 : 0;
814
815 /* CSI2 mode */
816 if (pcdev->pdata->csi2)
817 value |= 3 << 12;
818
819 ceu_write(pcdev, CAMCR, value);
820
821 ceu_write(pcdev, CAPCR, 0x00300000);
822
823 switch (pcdev->field) {
824 case V4L2_FIELD_INTERLACED_TB:
825 value = 0x101;
826 break;
827 case V4L2_FIELD_INTERLACED_BT:
828 value = 0x102;
829 break;
830 default:
831 value = 0;
832 break;
833 }
834 ceu_write(pcdev, CAIFR, value);
835
836 sh_mobile_ceu_set_rect(icd);
837 mdelay(1);
838
839 dev_geo(icd->parent, "CFLCR 0x%x\n", pcdev->cflcr);
840 ceu_write(pcdev, CFLCR, pcdev->cflcr);
841
842 /*
843 * A few words about byte order (observed in Big Endian mode)
844 *
845 * In data fetch mode bytes are received in chunks of 8 bytes.
846 * D0, D1, D2, D3, D4, D5, D6, D7 (D0 received first)
847 *
848 * The data is however by default written to memory in reverse order:
849 * D7, D6, D5, D4, D3, D2, D1, D0 (D7 written to lowest byte)
850 *
851 * The lowest three bits of CDOCR allows us to do swapping,
852 * using 7 we swap the data bytes to match the incoming order:
853 * D0, D1, D2, D3, D4, D5, D6, D7
854 */
855 value = 0x00000017;
856 if (yuv_lineskip)
857 value &= ~0x00000010; /* convert 4:2:2 -> 4:2:0 */
858
859 ceu_write(pcdev, CDOCR, value);
860 ceu_write(pcdev, CFWCR, 0); /* keep "datafetch firewall" disabled */
861
862 dev_dbg(icd->parent, "S_FMT successful for %c%c%c%c %ux%u\n",
863 pixfmt & 0xff, (pixfmt >> 8) & 0xff,
864 (pixfmt >> 16) & 0xff, (pixfmt >> 24) & 0xff,
865 icd->user_width, icd->user_height);
866
867 capture_restore(pcdev, capsr);
868
869 /* not in bundle mode: skip CBDSR, CDAYR2, CDACR2, CDBYR2, CDBCR2 */
870 return 0;
871 }
872
873 static int sh_mobile_ceu_try_bus_param(struct soc_camera_device *icd,
874 unsigned char buswidth)
875 {
876 struct soc_camera_host *ici = to_soc_camera_host(icd->parent);
877 struct sh_mobile_ceu_dev *pcdev = ici->priv;
878 unsigned long camera_flags, common_flags;
879
880 camera_flags = icd->ops->query_bus_param(icd);
881 common_flags = soc_camera_bus_param_compatible(camera_flags,
882 make_bus_param(pcdev));
883 if (!common_flags || buswidth > 16 ||
884 (buswidth > 8 && !(common_flags & SOCAM_DATAWIDTH_16)))
885 return -EINVAL;
886
887 return 0;
888 }
889
890 static const struct soc_mbus_pixelfmt sh_mobile_ceu_formats[] = {
891 {
892 .fourcc = V4L2_PIX_FMT_NV12,
893 .name = "NV12",
894 .bits_per_sample = 12,
895 .packing = SOC_MBUS_PACKING_NONE,
896 .order = SOC_MBUS_ORDER_LE,
897 }, {
898 .fourcc = V4L2_PIX_FMT_NV21,
899 .name = "NV21",
900 .bits_per_sample = 12,
901 .packing = SOC_MBUS_PACKING_NONE,
902 .order = SOC_MBUS_ORDER_LE,
903 }, {
904 .fourcc = V4L2_PIX_FMT_NV16,
905 .name = "NV16",
906 .bits_per_sample = 16,
907 .packing = SOC_MBUS_PACKING_NONE,
908 .order = SOC_MBUS_ORDER_LE,
909 }, {
910 .fourcc = V4L2_PIX_FMT_NV61,
911 .name = "NV61",
912 .bits_per_sample = 16,
913 .packing = SOC_MBUS_PACKING_NONE,
914 .order = SOC_MBUS_ORDER_LE,
915 },
916 };
917
918 /* This will be corrected as we get more formats */
919 static bool sh_mobile_ceu_packing_supported(const struct soc_mbus_pixelfmt *fmt)
920 {
921 return fmt->packing == SOC_MBUS_PACKING_NONE ||
922 (fmt->bits_per_sample == 8 &&
923 fmt->packing == SOC_MBUS_PACKING_2X8_PADHI) ||
924 (fmt->bits_per_sample > 8 &&
925 fmt->packing == SOC_MBUS_PACKING_EXTEND16);
926 }
927
928 static int client_g_rect(struct v4l2_subdev *sd, struct v4l2_rect *rect);
929
930 static int sh_mobile_ceu_get_formats(struct soc_camera_device *icd, unsigned int idx,
931 struct soc_camera_format_xlate *xlate)
932 {
933 struct v4l2_subdev *sd = soc_camera_to_subdev(icd);
934 struct device *dev = icd->parent;
935 struct soc_camera_host *ici = to_soc_camera_host(dev);
936 struct sh_mobile_ceu_dev *pcdev = ici->priv;
937 int ret, k, n;
938 int formats = 0;
939 struct sh_mobile_ceu_cam *cam;
940 enum v4l2_mbus_pixelcode code;
941 const struct soc_mbus_pixelfmt *fmt;
942
943 ret = v4l2_subdev_call(sd, video, enum_mbus_fmt, idx, &code);
944 if (ret < 0)
945 /* No more formats */
946 return 0;
947
948 fmt = soc_mbus_get_fmtdesc(code);
949 if (!fmt) {
950 dev_warn(dev, "unsupported format code #%u: %d\n", idx, code);
951 return 0;
952 }
953
954 if (!pcdev->pdata->csi2) {
955 ret = sh_mobile_ceu_try_bus_param(icd, fmt->bits_per_sample);
956 if (ret < 0)
957 return 0;
958 }
959
960 if (!icd->host_priv) {
961 struct v4l2_mbus_framefmt mf;
962 struct v4l2_rect rect;
963 int shift = 0;
964
965 /* FIXME: subwindow is lost between close / open */
966
967 /* Cache current client geometry */
968 ret = client_g_rect(sd, &rect);
969 if (ret < 0)
970 return ret;
971
972 /* First time */
973 ret = v4l2_subdev_call(sd, video, g_mbus_fmt, &mf);
974 if (ret < 0)
975 return ret;
976
977 while ((mf.width > 2560 || mf.height > 1920) && shift < 4) {
978 /* Try 2560x1920, 1280x960, 640x480, 320x240 */
979 mf.width = 2560 >> shift;
980 mf.height = 1920 >> shift;
981 ret = v4l2_device_call_until_err(sd->v4l2_dev, (long)icd, video,
982 s_mbus_fmt, &mf);
983 if (ret < 0)
984 return ret;
985 shift++;
986 }
987
988 if (shift == 4) {
989 dev_err(dev, "Failed to configure the client below %ux%x\n",
990 mf.width, mf.height);
991 return -EIO;
992 }
993
994 dev_geo(dev, "camera fmt %ux%u\n", mf.width, mf.height);
995
996 cam = kzalloc(sizeof(*cam), GFP_KERNEL);
997 if (!cam)
998 return -ENOMEM;
999
1000 /* We are called with current camera crop, initialise subrect with it */
1001 cam->rect = rect;
1002 cam->subrect = rect;
1003
1004 cam->width = mf.width;
1005 cam->height = mf.height;
1006
1007 cam->width = mf.width;
1008 cam->height = mf.height;
1009
1010 icd->host_priv = cam;
1011 } else {
1012 cam = icd->host_priv;
1013 }
1014
1015 /* Beginning of a pass */
1016 if (!idx)
1017 cam->extra_fmt = NULL;
1018
1019 switch (code) {
1020 case V4L2_MBUS_FMT_UYVY8_2X8:
1021 case V4L2_MBUS_FMT_VYUY8_2X8:
1022 case V4L2_MBUS_FMT_YUYV8_2X8:
1023 case V4L2_MBUS_FMT_YVYU8_2X8:
1024 if (cam->extra_fmt)
1025 break;
1026
1027 /*
1028 * Our case is simple so far: for any of the above four camera
1029 * formats we add all our four synthesized NV* formats, so,
1030 * just marking the device with a single flag suffices. If
1031 * the format generation rules are more complex, you would have
1032 * to actually hang your already added / counted formats onto
1033 * the host_priv pointer and check whether the format you're
1034 * going to add now is already there.
1035 */
1036 cam->extra_fmt = sh_mobile_ceu_formats;
1037
1038 n = ARRAY_SIZE(sh_mobile_ceu_formats);
1039 formats += n;
1040 for (k = 0; xlate && k < n; k++) {
1041 xlate->host_fmt = &sh_mobile_ceu_formats[k];
1042 xlate->code = code;
1043 xlate++;
1044 dev_dbg(dev, "Providing format %s using code %d\n",
1045 sh_mobile_ceu_formats[k].name, code);
1046 }
1047 break;
1048 default:
1049 if (!sh_mobile_ceu_packing_supported(fmt))
1050 return 0;
1051 }
1052
1053 /* Generic pass-through */
1054 formats++;
1055 if (xlate) {
1056 xlate->host_fmt = fmt;
1057 xlate->code = code;
1058 xlate++;
1059 dev_dbg(dev, "Providing format %s in pass-through mode\n",
1060 fmt->name);
1061 }
1062
1063 return formats;
1064 }
1065
1066 static void sh_mobile_ceu_put_formats(struct soc_camera_device *icd)
1067 {
1068 kfree(icd->host_priv);
1069 icd->host_priv = NULL;
1070 }
1071
1072 /* Check if any dimension of r1 is smaller than respective one of r2 */
1073 static bool is_smaller(struct v4l2_rect *r1, struct v4l2_rect *r2)
1074 {
1075 return r1->width < r2->width || r1->height < r2->height;
1076 }
1077
1078 /* Check if r1 fails to cover r2 */
1079 static bool is_inside(struct v4l2_rect *r1, struct v4l2_rect *r2)
1080 {
1081 return r1->left > r2->left || r1->top > r2->top ||
1082 r1->left + r1->width < r2->left + r2->width ||
1083 r1->top + r1->height < r2->top + r2->height;
1084 }
1085
1086 static unsigned int scale_down(unsigned int size, unsigned int scale)
1087 {
1088 return (size * 4096 + scale / 2) / scale;
1089 }
1090
1091 static unsigned int calc_generic_scale(unsigned int input, unsigned int output)
1092 {
1093 return (input * 4096 + output / 2) / output;
1094 }
1095
1096 /* Get and store current client crop */
1097 static int client_g_rect(struct v4l2_subdev *sd, struct v4l2_rect *rect)
1098 {
1099 struct v4l2_crop crop;
1100 struct v4l2_cropcap cap;
1101 int ret;
1102
1103 crop.type = V4L2_BUF_TYPE_VIDEO_CAPTURE;
1104
1105 ret = v4l2_subdev_call(sd, video, g_crop, &crop);
1106 if (!ret) {
1107 *rect = crop.c;
1108 return ret;
1109 }
1110
1111 /* Camera driver doesn't support .g_crop(), assume default rectangle */
1112 cap.type = V4L2_BUF_TYPE_VIDEO_CAPTURE;
1113
1114 ret = v4l2_subdev_call(sd, video, cropcap, &cap);
1115 if (!ret)
1116 *rect = cap.defrect;
1117
1118 return ret;
1119 }
1120
1121 /* Client crop has changed, update our sub-rectangle to remain within the area */
1122 static void update_subrect(struct sh_mobile_ceu_cam *cam)
1123 {
1124 struct v4l2_rect *rect = &cam->rect, *subrect = &cam->subrect;
1125
1126 if (rect->width < subrect->width)
1127 subrect->width = rect->width;
1128
1129 if (rect->height < subrect->height)
1130 subrect->height = rect->height;
1131
1132 if (rect->left > subrect->left)
1133 subrect->left = rect->left;
1134 else if (rect->left + rect->width >
1135 subrect->left + subrect->width)
1136 subrect->left = rect->left + rect->width -
1137 subrect->width;
1138
1139 if (rect->top > subrect->top)
1140 subrect->top = rect->top;
1141 else if (rect->top + rect->height >
1142 subrect->top + subrect->height)
1143 subrect->top = rect->top + rect->height -
1144 subrect->height;
1145 }
1146
1147 /*
1148 * The common for both scaling and cropping iterative approach is:
1149 * 1. try if the client can produce exactly what requested by the user
1150 * 2. if (1) failed, try to double the client image until we get one big enough
1151 * 3. if (2) failed, try to request the maximum image
1152 */
1153 static int client_s_crop(struct soc_camera_device *icd, struct v4l2_crop *crop,
1154 struct v4l2_crop *cam_crop)
1155 {
1156 struct v4l2_subdev *sd = soc_camera_to_subdev(icd);
1157 struct v4l2_rect *rect = &crop->c, *cam_rect = &cam_crop->c;
1158 struct device *dev = sd->v4l2_dev->dev;
1159 struct sh_mobile_ceu_cam *cam = icd->host_priv;
1160 struct v4l2_cropcap cap;
1161 int ret;
1162 unsigned int width, height;
1163
1164 v4l2_subdev_call(sd, video, s_crop, crop);
1165 ret = client_g_rect(sd, cam_rect);
1166 if (ret < 0)
1167 return ret;
1168
1169 /*
1170 * Now cam_crop contains the current camera input rectangle, and it must
1171 * be within camera cropcap bounds
1172 */
1173 if (!memcmp(rect, cam_rect, sizeof(*rect))) {
1174 /* Even if camera S_CROP failed, but camera rectangle matches */
1175 dev_dbg(dev, "Camera S_CROP successful for %dx%d@%d:%d\n",
1176 rect->width, rect->height, rect->left, rect->top);
1177 cam->rect = *cam_rect;
1178 return 0;
1179 }
1180
1181 /* Try to fix cropping, that camera hasn't managed to set */
1182 dev_geo(dev, "Fix camera S_CROP for %dx%d@%d:%d to %dx%d@%d:%d\n",
1183 cam_rect->width, cam_rect->height,
1184 cam_rect->left, cam_rect->top,
1185 rect->width, rect->height, rect->left, rect->top);
1186
1187 /* We need sensor maximum rectangle */
1188 ret = v4l2_subdev_call(sd, video, cropcap, &cap);
1189 if (ret < 0)
1190 return ret;
1191
1192 /* Put user requested rectangle within sensor bounds */
1193 soc_camera_limit_side(&rect->left, &rect->width, cap.bounds.left, 2,
1194 cap.bounds.width);
1195 soc_camera_limit_side(&rect->top, &rect->height, cap.bounds.top, 4,
1196 cap.bounds.height);
1197
1198 /*
1199 * Popular special case - some cameras can only handle fixed sizes like
1200 * QVGA, VGA,... Take care to avoid infinite loop.
1201 */
1202 width = max(cam_rect->width, 2);
1203 height = max(cam_rect->height, 2);
1204
1205 /*
1206 * Loop as long as sensor is not covering the requested rectangle and
1207 * is still within its bounds
1208 */
1209 while (!ret && (is_smaller(cam_rect, rect) ||
1210 is_inside(cam_rect, rect)) &&
1211 (cap.bounds.width > width || cap.bounds.height > height)) {
1212
1213 width *= 2;
1214 height *= 2;
1215
1216 cam_rect->width = width;
1217 cam_rect->height = height;
1218
1219 /*
1220 * We do not know what capabilities the camera has to set up
1221 * left and top borders. We could try to be smarter in iterating
1222 * them, e.g., if camera current left is to the right of the
1223 * target left, set it to the middle point between the current
1224 * left and minimum left. But that would add too much
1225 * complexity: we would have to iterate each border separately.
1226 * Instead we just drop to the left and top bounds.
1227 */
1228 if (cam_rect->left > rect->left)
1229 cam_rect->left = cap.bounds.left;
1230
1231 if (cam_rect->left + cam_rect->width < rect->left + rect->width)
1232 cam_rect->width = rect->left + rect->width -
1233 cam_rect->left;
1234
1235 if (cam_rect->top > rect->top)
1236 cam_rect->top = cap.bounds.top;
1237
1238 if (cam_rect->top + cam_rect->height < rect->top + rect->height)
1239 cam_rect->height = rect->top + rect->height -
1240 cam_rect->top;
1241
1242 v4l2_subdev_call(sd, video, s_crop, cam_crop);
1243 ret = client_g_rect(sd, cam_rect);
1244 dev_geo(dev, "Camera S_CROP %d for %dx%d@%d:%d\n", ret,
1245 cam_rect->width, cam_rect->height,
1246 cam_rect->left, cam_rect->top);
1247 }
1248
1249 /* S_CROP must not modify the rectangle */
1250 if (is_smaller(cam_rect, rect) || is_inside(cam_rect, rect)) {
1251 /*
1252 * The camera failed to configure a suitable cropping,
1253 * we cannot use the current rectangle, set to max
1254 */
1255 *cam_rect = cap.bounds;
1256 v4l2_subdev_call(sd, video, s_crop, cam_crop);
1257 ret = client_g_rect(sd, cam_rect);
1258 dev_geo(dev, "Camera S_CROP %d for max %dx%d@%d:%d\n", ret,
1259 cam_rect->width, cam_rect->height,
1260 cam_rect->left, cam_rect->top);
1261 }
1262
1263 if (!ret) {
1264 cam->rect = *cam_rect;
1265 update_subrect(cam);
1266 }
1267
1268 return ret;
1269 }
1270
1271 /* Iterative s_mbus_fmt, also updates cached client crop on success */
1272 static int client_s_fmt(struct soc_camera_device *icd,
1273 struct v4l2_mbus_framefmt *mf, bool ceu_can_scale)
1274 {
1275 struct sh_mobile_ceu_cam *cam = icd->host_priv;
1276 struct v4l2_subdev *sd = soc_camera_to_subdev(icd);
1277 struct device *dev = icd->parent;
1278 unsigned int width = mf->width, height = mf->height, tmp_w, tmp_h;
1279 unsigned int max_width, max_height;
1280 struct v4l2_cropcap cap;
1281 int ret;
1282
1283 ret = v4l2_device_call_until_err(sd->v4l2_dev, (long)icd, video,
1284 s_mbus_fmt, mf);
1285 if (ret < 0)
1286 return ret;
1287
1288 dev_geo(dev, "camera scaled to %ux%u\n", mf->width, mf->height);
1289
1290 if ((width == mf->width && height == mf->height) || !ceu_can_scale)
1291 goto update_cache;
1292
1293 cap.type = V4L2_BUF_TYPE_VIDEO_CAPTURE;
1294
1295 ret = v4l2_subdev_call(sd, video, cropcap, &cap);
1296 if (ret < 0)
1297 return ret;
1298
1299 max_width = min(cap.bounds.width, 2560);
1300 max_height = min(cap.bounds.height, 1920);
1301
1302 /* Camera set a format, but geometry is not precise, try to improve */
1303 tmp_w = mf->width;
1304 tmp_h = mf->height;
1305
1306 /* width <= max_width && height <= max_height - guaranteed by try_fmt */
1307 while ((width > tmp_w || height > tmp_h) &&
1308 tmp_w < max_width && tmp_h < max_height) {
1309 tmp_w = min(2 * tmp_w, max_width);
1310 tmp_h = min(2 * tmp_h, max_height);
1311 mf->width = tmp_w;
1312 mf->height = tmp_h;
1313 ret = v4l2_device_call_until_err(sd->v4l2_dev, (long)icd, video,
1314 s_mbus_fmt, mf);
1315 dev_geo(dev, "Camera scaled to %ux%u\n",
1316 mf->width, mf->height);
1317 if (ret < 0) {
1318 /* This shouldn't happen */
1319 dev_err(dev, "Client failed to set format: %d\n", ret);
1320 return ret;
1321 }
1322 }
1323
1324 update_cache:
1325 /* Update cache */
1326 ret = client_g_rect(sd, &cam->rect);
1327 if (ret < 0)
1328 return ret;
1329
1330 update_subrect(cam);
1331
1332 return 0;
1333 }
1334
1335 /**
1336 * @width - on output: user width, mapped back to input
1337 * @height - on output: user height, mapped back to input
1338 * @mf - in- / output camera output window
1339 */
1340 static int client_scale(struct soc_camera_device *icd,
1341 struct v4l2_mbus_framefmt *mf,
1342 unsigned int *width, unsigned int *height,
1343 bool ceu_can_scale)
1344 {
1345 struct sh_mobile_ceu_cam *cam = icd->host_priv;
1346 struct device *dev = icd->parent;
1347 struct v4l2_mbus_framefmt mf_tmp = *mf;
1348 unsigned int scale_h, scale_v;
1349 int ret;
1350
1351 /*
1352 * 5. Apply iterative camera S_FMT for camera user window (also updates
1353 * client crop cache and the imaginary sub-rectangle).
1354 */
1355 ret = client_s_fmt(icd, &mf_tmp, ceu_can_scale);
1356 if (ret < 0)
1357 return ret;
1358
1359 dev_geo(dev, "5: camera scaled to %ux%u\n",
1360 mf_tmp.width, mf_tmp.height);
1361
1362 /* 6. Retrieve camera output window (g_fmt) */
1363
1364 /* unneeded - it is already in "mf_tmp" */
1365
1366 /* 7. Calculate new client scales. */
1367 scale_h = calc_generic_scale(cam->rect.width, mf_tmp.width);
1368 scale_v = calc_generic_scale(cam->rect.height, mf_tmp.height);
1369
1370 mf->width = mf_tmp.width;
1371 mf->height = mf_tmp.height;
1372 mf->colorspace = mf_tmp.colorspace;
1373
1374 /*
1375 * 8. Calculate new CEU crop - apply camera scales to previously
1376 * updated "effective" crop.
1377 */
1378 *width = scale_down(cam->subrect.width, scale_h);
1379 *height = scale_down(cam->subrect.height, scale_v);
1380
1381 dev_geo(dev, "8: new client sub-window %ux%u\n", *width, *height);
1382
1383 return 0;
1384 }
1385
1386 /*
1387 * CEU can scale and crop, but we don't want to waste bandwidth and kill the
1388 * framerate by always requesting the maximum image from the client. See
1389 * Documentation/video4linux/sh_mobile_ceu_camera.txt for a description of
1390 * scaling and cropping algorithms and for the meaning of referenced here steps.
1391 */
1392 static int sh_mobile_ceu_set_crop(struct soc_camera_device *icd,
1393 struct v4l2_crop *a)
1394 {
1395 struct v4l2_rect *rect = &a->c;
1396 struct device *dev = icd->parent;
1397 struct soc_camera_host *ici = to_soc_camera_host(dev);
1398 struct sh_mobile_ceu_dev *pcdev = ici->priv;
1399 struct v4l2_crop cam_crop;
1400 struct sh_mobile_ceu_cam *cam = icd->host_priv;
1401 struct v4l2_rect *cam_rect = &cam_crop.c;
1402 struct v4l2_subdev *sd = soc_camera_to_subdev(icd);
1403 struct v4l2_mbus_framefmt mf;
1404 unsigned int scale_cam_h, scale_cam_v, scale_ceu_h, scale_ceu_v,
1405 out_width, out_height;
1406 int interm_width, interm_height;
1407 u32 capsr, cflcr;
1408 int ret;
1409
1410 dev_geo(dev, "S_CROP(%ux%u@%u:%u)\n", rect->width, rect->height,
1411 rect->left, rect->top);
1412
1413 /* During camera cropping its output window can change too, stop CEU */
1414 capsr = capture_save_reset(pcdev);
1415 dev_dbg(dev, "CAPSR 0x%x, CFLCR 0x%x\n", capsr, pcdev->cflcr);
1416
1417 /* 1. - 2. Apply iterative camera S_CROP for new input window. */
1418 ret = client_s_crop(icd, a, &cam_crop);
1419 if (ret < 0)
1420 return ret;
1421
1422 dev_geo(dev, "1-2: camera cropped to %ux%u@%u:%u\n",
1423 cam_rect->width, cam_rect->height,
1424 cam_rect->left, cam_rect->top);
1425
1426 /* On success cam_crop contains current camera crop */
1427
1428 /* 3. Retrieve camera output window */
1429 ret = v4l2_subdev_call(sd, video, g_mbus_fmt, &mf);
1430 if (ret < 0)
1431 return ret;
1432
1433 if (mf.width > 2560 || mf.height > 1920)
1434 return -EINVAL;
1435
1436 /* 4. Calculate camera scales */
1437 scale_cam_h = calc_generic_scale(cam_rect->width, mf.width);
1438 scale_cam_v = calc_generic_scale(cam_rect->height, mf.height);
1439
1440 /* Calculate intermediate window */
1441 interm_width = scale_down(rect->width, scale_cam_h);
1442 interm_height = scale_down(rect->height, scale_cam_v);
1443
1444 if (interm_width < icd->user_width) {
1445 u32 new_scale_h;
1446
1447 new_scale_h = calc_generic_scale(rect->width, icd->user_width);
1448
1449 mf.width = scale_down(cam_rect->width, new_scale_h);
1450 }
1451
1452 if (interm_height < icd->user_height) {
1453 u32 new_scale_v;
1454
1455 new_scale_v = calc_generic_scale(rect->height, icd->user_height);
1456
1457 mf.height = scale_down(cam_rect->height, new_scale_v);
1458 }
1459
1460 if (interm_width < icd->user_width || interm_height < icd->user_height) {
1461 ret = v4l2_device_call_until_err(sd->v4l2_dev, (int)icd, video,
1462 s_mbus_fmt, &mf);
1463 if (ret < 0)
1464 return ret;
1465
1466 dev_geo(dev, "New camera output %ux%u\n", mf.width, mf.height);
1467 scale_cam_h = calc_generic_scale(cam_rect->width, mf.width);
1468 scale_cam_v = calc_generic_scale(cam_rect->height, mf.height);
1469 interm_width = scale_down(rect->width, scale_cam_h);
1470 interm_height = scale_down(rect->height, scale_cam_v);
1471 }
1472
1473 /* Cache camera output window */
1474 cam->width = mf.width;
1475 cam->height = mf.height;
1476
1477 if (pcdev->image_mode) {
1478 out_width = min(interm_width, icd->user_width);
1479 out_height = min(interm_height, icd->user_height);
1480 } else {
1481 out_width = interm_width;
1482 out_height = interm_height;
1483 }
1484
1485 /*
1486 * 5. Calculate CEU scales from camera scales from results of (5) and
1487 * the user window
1488 */
1489 scale_ceu_h = calc_scale(interm_width, &out_width);
1490 scale_ceu_v = calc_scale(interm_height, &out_height);
1491
1492 dev_geo(dev, "5: CEU scales %u:%u\n", scale_ceu_h, scale_ceu_v);
1493
1494 /* Apply CEU scales. */
1495 cflcr = scale_ceu_h | (scale_ceu_v << 16);
1496 if (cflcr != pcdev->cflcr) {
1497 pcdev->cflcr = cflcr;
1498 ceu_write(pcdev, CFLCR, cflcr);
1499 }
1500
1501 icd->user_width = out_width;
1502 icd->user_height = out_height;
1503 cam->ceu_left = scale_down(rect->left - cam_rect->left, scale_cam_h) & ~1;
1504 cam->ceu_top = scale_down(rect->top - cam_rect->top, scale_cam_v) & ~1;
1505
1506 /* 6. Use CEU cropping to crop to the new window. */
1507 sh_mobile_ceu_set_rect(icd);
1508
1509 cam->subrect = *rect;
1510
1511 dev_geo(dev, "6: CEU cropped to %ux%u@%u:%u\n",
1512 icd->user_width, icd->user_height,
1513 cam->ceu_left, cam->ceu_top);
1514
1515 /* Restore capture. The CE bit can be cleared by the hardware */
1516 if (pcdev->active)
1517 capsr |= 1;
1518 capture_restore(pcdev, capsr);
1519
1520 /* Even if only camera cropping succeeded */
1521 return ret;
1522 }
1523
1524 static int sh_mobile_ceu_get_crop(struct soc_camera_device *icd,
1525 struct v4l2_crop *a)
1526 {
1527 struct sh_mobile_ceu_cam *cam = icd->host_priv;
1528
1529 a->type = V4L2_BUF_TYPE_VIDEO_CAPTURE;
1530 a->c = cam->subrect;
1531
1532 return 0;
1533 }
1534
1535 /*
1536 * Calculate real client output window by applying new scales to the current
1537 * client crop. New scales are calculated from the requested output format and
1538 * CEU crop, mapped backed onto the client input (subrect).
1539 */
1540 static void calculate_client_output(struct soc_camera_device *icd,
1541 struct v4l2_pix_format *pix, struct v4l2_mbus_framefmt *mf)
1542 {
1543 struct sh_mobile_ceu_cam *cam = icd->host_priv;
1544 struct device *dev = icd->parent;
1545 struct v4l2_rect *cam_subrect = &cam->subrect;
1546 unsigned int scale_v, scale_h;
1547
1548 if (cam_subrect->width == cam->rect.width &&
1549 cam_subrect->height == cam->rect.height) {
1550 /* No sub-cropping */
1551 mf->width = pix->width;
1552 mf->height = pix->height;
1553 return;
1554 }
1555
1556 /* 1.-2. Current camera scales and subwin - cached. */
1557
1558 dev_geo(dev, "2: subwin %ux%u@%u:%u\n",
1559 cam_subrect->width, cam_subrect->height,
1560 cam_subrect->left, cam_subrect->top);
1561
1562 /*
1563 * 3. Calculate new combined scales from input sub-window to requested
1564 * user window.
1565 */
1566
1567 /*
1568 * TODO: CEU cannot scale images larger than VGA to smaller than SubQCIF
1569 * (128x96) or larger than VGA
1570 */
1571 scale_h = calc_generic_scale(cam_subrect->width, pix->width);
1572 scale_v = calc_generic_scale(cam_subrect->height, pix->height);
1573
1574 dev_geo(dev, "3: scales %u:%u\n", scale_h, scale_v);
1575
1576 /*
1577 * 4. Calculate client output window by applying combined scales to real
1578 * input window.
1579 */
1580 mf->width = scale_down(cam->rect.width, scale_h);
1581 mf->height = scale_down(cam->rect.height, scale_v);
1582 }
1583
1584 /* Similar to set_crop multistage iterative algorithm */
1585 static int sh_mobile_ceu_set_fmt(struct soc_camera_device *icd,
1586 struct v4l2_format *f)
1587 {
1588 struct device *dev = icd->parent;
1589 struct soc_camera_host *ici = to_soc_camera_host(dev);
1590 struct sh_mobile_ceu_dev *pcdev = ici->priv;
1591 struct sh_mobile_ceu_cam *cam = icd->host_priv;
1592 struct v4l2_pix_format *pix = &f->fmt.pix;
1593 struct v4l2_mbus_framefmt mf;
1594 __u32 pixfmt = pix->pixelformat;
1595 const struct soc_camera_format_xlate *xlate;
1596 /* Keep Compiler Happy */
1597 unsigned int ceu_sub_width = 0, ceu_sub_height = 0;
1598 u16 scale_v, scale_h;
1599 int ret;
1600 bool image_mode;
1601 enum v4l2_field field;
1602
1603 dev_geo(dev, "S_FMT(pix=0x%x, %ux%u)\n", pixfmt, pix->width, pix->height);
1604
1605 switch (pix->field) {
1606 default:
1607 pix->field = V4L2_FIELD_NONE;
1608 /* fall-through */
1609 case V4L2_FIELD_INTERLACED_TB:
1610 case V4L2_FIELD_INTERLACED_BT:
1611 case V4L2_FIELD_NONE:
1612 field = pix->field;
1613 break;
1614 case V4L2_FIELD_INTERLACED:
1615 field = V4L2_FIELD_INTERLACED_TB;
1616 break;
1617 }
1618
1619 xlate = soc_camera_xlate_by_fourcc(icd, pixfmt);
1620 if (!xlate) {
1621 dev_warn(dev, "Format %x not found\n", pixfmt);
1622 return -EINVAL;
1623 }
1624
1625 /* 1.-4. Calculate client output geometry */
1626 calculate_client_output(icd, &f->fmt.pix, &mf);
1627 mf.field = pix->field;
1628 mf.colorspace = pix->colorspace;
1629 mf.code = xlate->code;
1630
1631 switch (pixfmt) {
1632 case V4L2_PIX_FMT_NV12:
1633 case V4L2_PIX_FMT_NV21:
1634 case V4L2_PIX_FMT_NV16:
1635 case V4L2_PIX_FMT_NV61:
1636 image_mode = true;
1637 break;
1638 default:
1639 image_mode = false;
1640 }
1641
1642 dev_geo(dev, "4: request camera output %ux%u\n", mf.width, mf.height);
1643
1644 /* 5. - 9. */
1645 ret = client_scale(icd, &mf, &ceu_sub_width, &ceu_sub_height,
1646 image_mode && V4L2_FIELD_NONE == field);
1647
1648 dev_geo(dev, "5-9: client scale return %d\n", ret);
1649
1650 /* Done with the camera. Now see if we can improve the result */
1651
1652 dev_geo(dev, "fmt %ux%u, requested %ux%u\n",
1653 mf.width, mf.height, pix->width, pix->height);
1654 if (ret < 0)
1655 return ret;
1656
1657 if (mf.code != xlate->code)
1658 return -EINVAL;
1659
1660 /* 9. Prepare CEU crop */
1661 cam->width = mf.width;
1662 cam->height = mf.height;
1663
1664 /* 10. Use CEU scaling to scale to the requested user window. */
1665
1666 /* We cannot scale up */
1667 if (pix->width > ceu_sub_width)
1668 ceu_sub_width = pix->width;
1669
1670 if (pix->height > ceu_sub_height)
1671 ceu_sub_height = pix->height;
1672
1673 pix->colorspace = mf.colorspace;
1674
1675 if (image_mode) {
1676 /* Scale pix->{width x height} down to width x height */
1677 scale_h = calc_scale(ceu_sub_width, &pix->width);
1678 scale_v = calc_scale(ceu_sub_height, &pix->height);
1679 } else {
1680 pix->width = ceu_sub_width;
1681 pix->height = ceu_sub_height;
1682 scale_h = 0;
1683 scale_v = 0;
1684 }
1685
1686 pcdev->cflcr = scale_h | (scale_v << 16);
1687
1688 /*
1689 * We have calculated CFLCR, the actual configuration will be performed
1690 * in sh_mobile_ceu_set_bus_param()
1691 */
1692
1693 dev_geo(dev, "10: W: %u : 0x%x = %u, H: %u : 0x%x = %u\n",
1694 ceu_sub_width, scale_h, pix->width,
1695 ceu_sub_height, scale_v, pix->height);
1696
1697 cam->code = xlate->code;
1698 icd->current_fmt = xlate;
1699
1700 pcdev->field = field;
1701 pcdev->image_mode = image_mode;
1702
1703 return 0;
1704 }
1705
1706 static int sh_mobile_ceu_try_fmt(struct soc_camera_device *icd,
1707 struct v4l2_format *f)
1708 {
1709 const struct soc_camera_format_xlate *xlate;
1710 struct v4l2_pix_format *pix = &f->fmt.pix;
1711 struct v4l2_subdev *sd = soc_camera_to_subdev(icd);
1712 struct v4l2_mbus_framefmt mf;
1713 __u32 pixfmt = pix->pixelformat;
1714 int width, height;
1715 int ret;
1716
1717 dev_geo(icd->parent, "TRY_FMT(pix=0x%x, %ux%u)\n",
1718 pixfmt, pix->width, pix->height);
1719
1720 xlate = soc_camera_xlate_by_fourcc(icd, pixfmt);
1721 if (!xlate) {
1722 dev_warn(icd->parent, "Format %x not found\n", pixfmt);
1723 return -EINVAL;
1724 }
1725
1726 /* FIXME: calculate using depth and bus width */
1727
1728 v4l_bound_align_image(&pix->width, 2, 2560, 1,
1729 &pix->height, 4, 1920, 2, 0);
1730
1731 width = pix->width;
1732 height = pix->height;
1733
1734 /* limit to sensor capabilities */
1735 mf.width = pix->width;
1736 mf.height = pix->height;
1737 mf.field = pix->field;
1738 mf.code = xlate->code;
1739 mf.colorspace = pix->colorspace;
1740
1741 ret = v4l2_device_call_until_err(sd->v4l2_dev, (long)icd, video, try_mbus_fmt, &mf);
1742 if (ret < 0)
1743 return ret;
1744
1745 pix->width = mf.width;
1746 pix->height = mf.height;
1747 pix->field = mf.field;
1748 pix->colorspace = mf.colorspace;
1749
1750 switch (pixfmt) {
1751 case V4L2_PIX_FMT_NV12:
1752 case V4L2_PIX_FMT_NV21:
1753 case V4L2_PIX_FMT_NV16:
1754 case V4L2_PIX_FMT_NV61:
1755 /* FIXME: check against rect_max after converting soc-camera */
1756 /* We can scale precisely, need a bigger image from camera */
1757 if (pix->width < width || pix->height < height) {
1758 /*
1759 * We presume, the sensor behaves sanely, i.e., if
1760 * requested a bigger rectangle, it will not return a
1761 * smaller one.
1762 */
1763 mf.width = 2560;
1764 mf.height = 1920;
1765 ret = v4l2_device_call_until_err(sd->v4l2_dev, (long)icd, video,
1766 try_mbus_fmt, &mf);
1767 if (ret < 0) {
1768 /* Shouldn't actually happen... */
1769 dev_err(icd->parent,
1770 "FIXME: client try_fmt() = %d\n", ret);
1771 return ret;
1772 }
1773 }
1774 /* We will scale exactly */
1775 if (mf.width > width)
1776 pix->width = width;
1777 if (mf.height > height)
1778 pix->height = height;
1779 }
1780
1781 dev_geo(icd->parent, "%s(): return %d, fmt 0x%x, %ux%u\n",
1782 __func__, ret, pix->pixelformat, pix->width, pix->height);
1783
1784 return ret;
1785 }
1786
1787 static int sh_mobile_ceu_set_livecrop(struct soc_camera_device *icd,
1788 struct v4l2_crop *a)
1789 {
1790 struct v4l2_subdev *sd = soc_camera_to_subdev(icd);
1791 struct soc_camera_host *ici = to_soc_camera_host(icd->parent);
1792 struct sh_mobile_ceu_dev *pcdev = ici->priv;
1793 u32 out_width = icd->user_width, out_height = icd->user_height;
1794 int ret;
1795
1796 /* Freeze queue */
1797 pcdev->frozen = 1;
1798 /* Wait for frame */
1799 ret = wait_for_completion_interruptible(&pcdev->complete);
1800 /* Stop the client */
1801 ret = v4l2_subdev_call(sd, video, s_stream, 0);
1802 if (ret < 0)
1803 dev_warn(icd->parent,
1804 "Client failed to stop the stream: %d\n", ret);
1805 else
1806 /* Do the crop, if it fails, there's nothing more we can do */
1807 sh_mobile_ceu_set_crop(icd, a);
1808
1809 dev_geo(icd->parent, "Output after crop: %ux%u\n", icd->user_width, icd->user_height);
1810
1811 if (icd->user_width != out_width || icd->user_height != out_height) {
1812 struct v4l2_format f = {
1813 .type = V4L2_BUF_TYPE_VIDEO_CAPTURE,
1814 .fmt.pix = {
1815 .width = out_width,
1816 .height = out_height,
1817 .pixelformat = icd->current_fmt->host_fmt->fourcc,
1818 .field = pcdev->field,
1819 .colorspace = icd->colorspace,
1820 },
1821 };
1822 ret = sh_mobile_ceu_set_fmt(icd, &f);
1823 if (!ret && (out_width != f.fmt.pix.width ||
1824 out_height != f.fmt.pix.height))
1825 ret = -EINVAL;
1826 if (!ret) {
1827 icd->user_width = out_width;
1828 icd->user_height = out_height;
1829 ret = sh_mobile_ceu_set_bus_param(icd,
1830 icd->current_fmt->host_fmt->fourcc);
1831 }
1832 }
1833
1834 /* Thaw the queue */
1835 pcdev->frozen = 0;
1836 spin_lock_irq(&pcdev->lock);
1837 sh_mobile_ceu_capture(pcdev);
1838 spin_unlock_irq(&pcdev->lock);
1839 /* Start the client */
1840 ret = v4l2_subdev_call(sd, video, s_stream, 1);
1841 return ret;
1842 }
1843
1844 static unsigned int sh_mobile_ceu_poll(struct file *file, poll_table *pt)
1845 {
1846 struct soc_camera_device *icd = file->private_data;
1847
1848 return vb2_poll(&icd->vb2_vidq, file, pt);
1849 }
1850
1851 static int sh_mobile_ceu_querycap(struct soc_camera_host *ici,
1852 struct v4l2_capability *cap)
1853 {
1854 strlcpy(cap->card, "SuperH_Mobile_CEU", sizeof(cap->card));
1855 cap->capabilities = V4L2_CAP_VIDEO_CAPTURE | V4L2_CAP_STREAMING;
1856 return 0;
1857 }
1858
1859 static int sh_mobile_ceu_init_videobuf(struct vb2_queue *q,
1860 struct soc_camera_device *icd)
1861 {
1862 q->type = V4L2_BUF_TYPE_VIDEO_CAPTURE;
1863 q->io_modes = VB2_MMAP | VB2_USERPTR;
1864 q->drv_priv = icd;
1865 q->ops = &sh_mobile_ceu_videobuf_ops;
1866 q->mem_ops = &vb2_dma_contig_memops;
1867 q->buf_struct_size = sizeof(struct sh_mobile_ceu_buffer);
1868
1869 return vb2_queue_init(q);
1870 }
1871
1872 static int sh_mobile_ceu_get_ctrl(struct soc_camera_device *icd,
1873 struct v4l2_control *ctrl)
1874 {
1875 struct soc_camera_host *ici = to_soc_camera_host(icd->parent);
1876 struct sh_mobile_ceu_dev *pcdev = ici->priv;
1877 u32 val;
1878
1879 switch (ctrl->id) {
1880 case V4L2_CID_SHARPNESS:
1881 val = ceu_read(pcdev, CLFCR);
1882 ctrl->value = val ^ 1;
1883 return 0;
1884 }
1885 return -ENOIOCTLCMD;
1886 }
1887
1888 static int sh_mobile_ceu_set_ctrl(struct soc_camera_device *icd,
1889 struct v4l2_control *ctrl)
1890 {
1891 struct soc_camera_host *ici = to_soc_camera_host(icd->parent);
1892 struct sh_mobile_ceu_dev *pcdev = ici->priv;
1893
1894 switch (ctrl->id) {
1895 case V4L2_CID_SHARPNESS:
1896 switch (icd->current_fmt->host_fmt->fourcc) {
1897 case V4L2_PIX_FMT_NV12:
1898 case V4L2_PIX_FMT_NV21:
1899 case V4L2_PIX_FMT_NV16:
1900 case V4L2_PIX_FMT_NV61:
1901 ceu_write(pcdev, CLFCR, !ctrl->value);
1902 return 0;
1903 }
1904 return -EINVAL;
1905 }
1906 return -ENOIOCTLCMD;
1907 }
1908
1909 static const struct v4l2_queryctrl sh_mobile_ceu_controls[] = {
1910 {
1911 .id = V4L2_CID_SHARPNESS,
1912 .type = V4L2_CTRL_TYPE_BOOLEAN,
1913 .name = "Low-pass filter",
1914 .minimum = 0,
1915 .maximum = 1,
1916 .step = 1,
1917 .default_value = 0,
1918 },
1919 };
1920
1921 static struct soc_camera_host_ops sh_mobile_ceu_host_ops = {
1922 .owner = THIS_MODULE,
1923 .add = sh_mobile_ceu_add_device,
1924 .remove = sh_mobile_ceu_remove_device,
1925 .get_formats = sh_mobile_ceu_get_formats,
1926 .put_formats = sh_mobile_ceu_put_formats,
1927 .get_crop = sh_mobile_ceu_get_crop,
1928 .set_crop = sh_mobile_ceu_set_crop,
1929 .set_livecrop = sh_mobile_ceu_set_livecrop,
1930 .set_fmt = sh_mobile_ceu_set_fmt,
1931 .try_fmt = sh_mobile_ceu_try_fmt,
1932 .set_ctrl = sh_mobile_ceu_set_ctrl,
1933 .get_ctrl = sh_mobile_ceu_get_ctrl,
1934 .poll = sh_mobile_ceu_poll,
1935 .querycap = sh_mobile_ceu_querycap,
1936 .set_bus_param = sh_mobile_ceu_set_bus_param,
1937 .init_videobuf2 = sh_mobile_ceu_init_videobuf,
1938 .controls = sh_mobile_ceu_controls,
1939 .num_controls = ARRAY_SIZE(sh_mobile_ceu_controls),
1940 };
1941
1942 struct bus_wait {
1943 struct notifier_block notifier;
1944 struct completion completion;
1945 struct device *dev;
1946 };
1947
1948 static int bus_notify(struct notifier_block *nb,
1949 unsigned long action, void *data)
1950 {
1951 struct device *dev = data;
1952 struct bus_wait *wait = container_of(nb, struct bus_wait, notifier);
1953
1954 if (wait->dev != dev)
1955 return NOTIFY_DONE;
1956
1957 switch (action) {
1958 case BUS_NOTIFY_UNBOUND_DRIVER:
1959 /* Protect from module unloading */
1960 wait_for_completion(&wait->completion);
1961 return NOTIFY_OK;
1962 }
1963 return NOTIFY_DONE;
1964 }
1965
1966 static int __devinit sh_mobile_ceu_probe(struct platform_device *pdev)
1967 {
1968 struct sh_mobile_ceu_dev *pcdev;
1969 struct resource *res;
1970 void __iomem *base;
1971 unsigned int irq;
1972 int err = 0;
1973 struct bus_wait wait = {
1974 .completion = COMPLETION_INITIALIZER_ONSTACK(wait.completion),
1975 .notifier.notifier_call = bus_notify,
1976 };
1977 struct sh_mobile_ceu_companion *csi2;
1978
1979 res = platform_get_resource(pdev, IORESOURCE_MEM, 0);
1980 irq = platform_get_irq(pdev, 0);
1981 if (!res || (int)irq <= 0) {
1982 dev_err(&pdev->dev, "Not enough CEU platform resources.\n");
1983 err = -ENODEV;
1984 goto exit;
1985 }
1986
1987 pcdev = kzalloc(sizeof(*pcdev), GFP_KERNEL);
1988 if (!pcdev) {
1989 dev_err(&pdev->dev, "Could not allocate pcdev\n");
1990 err = -ENOMEM;
1991 goto exit;
1992 }
1993
1994 INIT_LIST_HEAD(&pcdev->capture);
1995 spin_lock_init(&pcdev->lock);
1996 init_completion(&pcdev->complete);
1997
1998 pcdev->pdata = pdev->dev.platform_data;
1999 if (!pcdev->pdata) {
2000 err = -EINVAL;
2001 dev_err(&pdev->dev, "CEU platform data not set.\n");
2002 goto exit_kfree;
2003 }
2004
2005 base = ioremap_nocache(res->start, resource_size(res));
2006 if (!base) {
2007 err = -ENXIO;
2008 dev_err(&pdev->dev, "Unable to ioremap CEU registers.\n");
2009 goto exit_kfree;
2010 }
2011
2012 pcdev->irq = irq;
2013 pcdev->base = base;
2014 pcdev->video_limit = 0; /* only enabled if second resource exists */
2015
2016 res = platform_get_resource(pdev, IORESOURCE_MEM, 1);
2017 if (res) {
2018 err = dma_declare_coherent_memory(&pdev->dev, res->start,
2019 res->start,
2020 resource_size(res),
2021 DMA_MEMORY_MAP |
2022 DMA_MEMORY_EXCLUSIVE);
2023 if (!err) {
2024 dev_err(&pdev->dev, "Unable to declare CEU memory.\n");
2025 err = -ENXIO;
2026 goto exit_iounmap;
2027 }
2028
2029 pcdev->video_limit = resource_size(res);
2030 }
2031
2032 /* request irq */
2033 err = request_irq(pcdev->irq, sh_mobile_ceu_irq, IRQF_DISABLED,
2034 dev_name(&pdev->dev), pcdev);
2035 if (err) {
2036 dev_err(&pdev->dev, "Unable to register CEU interrupt.\n");
2037 goto exit_release_mem;
2038 }
2039
2040 pm_suspend_ignore_children(&pdev->dev, true);
2041 pm_runtime_enable(&pdev->dev);
2042 pm_runtime_resume(&pdev->dev);
2043
2044 pcdev->ici.priv = pcdev;
2045 pcdev->ici.v4l2_dev.dev = &pdev->dev;
2046 pcdev->ici.nr = pdev->id;
2047 pcdev->ici.drv_name = dev_name(&pdev->dev);
2048 pcdev->ici.ops = &sh_mobile_ceu_host_ops;
2049
2050 pcdev->alloc_ctx = vb2_dma_contig_init_ctx(&pdev->dev);
2051 if (IS_ERR(pcdev->alloc_ctx)) {
2052 err = PTR_ERR(pcdev->alloc_ctx);
2053 goto exit_free_clk;
2054 }
2055
2056 err = soc_camera_host_register(&pcdev->ici);
2057 if (err)
2058 goto exit_free_ctx;
2059
2060 /* CSI2 interfacing */
2061 csi2 = pcdev->pdata->csi2;
2062 if (csi2) {
2063 struct platform_device *csi2_pdev =
2064 platform_device_alloc("sh-mobile-csi2", csi2->id);
2065 struct sh_csi2_pdata *csi2_pdata = csi2->platform_data;
2066
2067 if (!csi2_pdev) {
2068 err = -ENOMEM;
2069 goto exit_host_unregister;
2070 }
2071
2072 pcdev->csi2_pdev = csi2_pdev;
2073
2074 err = platform_device_add_data(csi2_pdev, csi2_pdata, sizeof(*csi2_pdata));
2075 if (err < 0)
2076 goto exit_pdev_put;
2077
2078 csi2_pdata = csi2_pdev->dev.platform_data;
2079 csi2_pdata->v4l2_dev = &pcdev->ici.v4l2_dev;
2080
2081 csi2_pdev->resource = csi2->resource;
2082 csi2_pdev->num_resources = csi2->num_resources;
2083
2084 err = platform_device_add(csi2_pdev);
2085 if (err < 0)
2086 goto exit_pdev_put;
2087
2088 wait.dev = &csi2_pdev->dev;
2089
2090 err = bus_register_notifier(&platform_bus_type, &wait.notifier);
2091 if (err < 0)
2092 goto exit_pdev_unregister;
2093
2094 /*
2095 * From this point the driver module will not unload, until
2096 * we complete the completion.
2097 */
2098
2099 if (!csi2_pdev->dev.driver) {
2100 complete(&wait.completion);
2101 /* Either too late, or probing failed */
2102 bus_unregister_notifier(&platform_bus_type, &wait.notifier);
2103 err = -ENXIO;
2104 goto exit_pdev_unregister;
2105 }
2106
2107 /*
2108 * The module is still loaded, in the worst case it is hanging
2109 * in device release on our completion. So, _now_ dereferencing
2110 * the "owner" is safe!
2111 */
2112
2113 err = try_module_get(csi2_pdev->dev.driver->owner);
2114
2115 /* Let notifier complete, if it has been locked */
2116 complete(&wait.completion);
2117 bus_unregister_notifier(&platform_bus_type, &wait.notifier);
2118 if (!err) {
2119 err = -ENODEV;
2120 goto exit_pdev_unregister;
2121 }
2122 }
2123
2124 return 0;
2125
2126 exit_pdev_unregister:
2127 platform_device_del(pcdev->csi2_pdev);
2128 exit_pdev_put:
2129 pcdev->csi2_pdev->resource = NULL;
2130 platform_device_put(pcdev->csi2_pdev);
2131 exit_host_unregister:
2132 soc_camera_host_unregister(&pcdev->ici);
2133 exit_free_ctx:
2134 vb2_dma_contig_cleanup_ctx(pcdev->alloc_ctx);
2135 exit_free_clk:
2136 pm_runtime_disable(&pdev->dev);
2137 free_irq(pcdev->irq, pcdev);
2138 exit_release_mem:
2139 if (platform_get_resource(pdev, IORESOURCE_MEM, 1))
2140 dma_release_declared_memory(&pdev->dev);
2141 exit_iounmap:
2142 iounmap(base);
2143 exit_kfree:
2144 kfree(pcdev);
2145 exit:
2146 return err;
2147 }
2148
2149 static int __devexit sh_mobile_ceu_remove(struct platform_device *pdev)
2150 {
2151 struct soc_camera_host *soc_host = to_soc_camera_host(&pdev->dev);
2152 struct sh_mobile_ceu_dev *pcdev = container_of(soc_host,
2153 struct sh_mobile_ceu_dev, ici);
2154 struct platform_device *csi2_pdev = pcdev->csi2_pdev;
2155
2156 soc_camera_host_unregister(soc_host);
2157 pm_runtime_disable(&pdev->dev);
2158 free_irq(pcdev->irq, pcdev);
2159 if (platform_get_resource(pdev, IORESOURCE_MEM, 1))
2160 dma_release_declared_memory(&pdev->dev);
2161 iounmap(pcdev->base);
2162 vb2_dma_contig_cleanup_ctx(pcdev->alloc_ctx);
2163 if (csi2_pdev && csi2_pdev->dev.driver) {
2164 struct module *csi2_drv = csi2_pdev->dev.driver->owner;
2165 platform_device_del(csi2_pdev);
2166 csi2_pdev->resource = NULL;
2167 platform_device_put(csi2_pdev);
2168 module_put(csi2_drv);
2169 }
2170 kfree(pcdev);
2171
2172 return 0;
2173 }
2174
2175 static int sh_mobile_ceu_runtime_nop(struct device *dev)
2176 {
2177 /* Runtime PM callback shared between ->runtime_suspend()
2178 * and ->runtime_resume(). Simply returns success.
2179 *
2180 * This driver re-initializes all registers after
2181 * pm_runtime_get_sync() anyway so there is no need
2182 * to save and restore registers here.
2183 */
2184 return 0;
2185 }
2186
2187 static const struct dev_pm_ops sh_mobile_ceu_dev_pm_ops = {
2188 .runtime_suspend = sh_mobile_ceu_runtime_nop,
2189 .runtime_resume = sh_mobile_ceu_runtime_nop,
2190 };
2191
2192 static struct platform_driver sh_mobile_ceu_driver = {
2193 .driver = {
2194 .name = "sh_mobile_ceu",
2195 .pm = &sh_mobile_ceu_dev_pm_ops,
2196 },
2197 .probe = sh_mobile_ceu_probe,
2198 .remove = __devexit_p(sh_mobile_ceu_remove),
2199 };
2200
2201 static int __init sh_mobile_ceu_init(void)
2202 {
2203 /* Whatever return code */
2204 request_module("sh_mobile_csi2");
2205 return platform_driver_register(&sh_mobile_ceu_driver);
2206 }
2207
2208 static void __exit sh_mobile_ceu_exit(void)
2209 {
2210 platform_driver_unregister(&sh_mobile_ceu_driver);
2211 }
2212
2213 module_init(sh_mobile_ceu_init);
2214 module_exit(sh_mobile_ceu_exit);
2215
2216 MODULE_DESCRIPTION("SuperH Mobile CEU driver");
2217 MODULE_AUTHOR("Magnus Damm");
2218 MODULE_LICENSE("GPL");
2219 MODULE_VERSION("0.0.6");
2220 MODULE_ALIAS("platform:sh_mobile_ceu");
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