V4L/DVB (12529): soc-camera: switch to s_crop v4l2-subdev video operation
[linux-2.6.git] / drivers / media / video / sh_mobile_ceu_camera.c
1 /*
2  * V4L2 Driver for SuperH Mobile CEU interface
3  *
4  * Copyright (C) 2008 Magnus Damm
5  *
6  * Based on V4L2 Driver for PXA camera host - "pxa_camera.c",
7  *
8  * Copyright (C) 2006, Sascha Hauer, Pengutronix
9  * Copyright (C) 2008, Guennadi Liakhovetski <kernel@pengutronix.de>
10  *
11  * This program is free software; you can redistribute it and/or modify
12  * it under the terms of the GNU General Public License as published by
13  * the Free Software Foundation; either version 2 of the License, or
14  * (at your option) any later version.
15  */
16
17 #include <linux/init.h>
18 #include <linux/module.h>
19 #include <linux/io.h>
20 #include <linux/delay.h>
21 #include <linux/dma-mapping.h>
22 #include <linux/errno.h>
23 #include <linux/fs.h>
24 #include <linux/interrupt.h>
25 #include <linux/kernel.h>
26 #include <linux/mm.h>
27 #include <linux/moduleparam.h>
28 #include <linux/time.h>
29 #include <linux/version.h>
30 #include <linux/device.h>
31 #include <linux/platform_device.h>
32 #include <linux/videodev2.h>
33 #include <linux/pm_runtime.h>
34
35 #include <media/v4l2-common.h>
36 #include <media/v4l2-dev.h>
37 #include <media/soc_camera.h>
38 #include <media/sh_mobile_ceu.h>
39 #include <media/videobuf-dma-contig.h>
40
41 /* register offsets for sh7722 / sh7723 */
42
43 #define CAPSR  0x00 /* Capture start register */
44 #define CAPCR  0x04 /* Capture control register */
45 #define CAMCR  0x08 /* Capture interface control register */
46 #define CMCYR  0x0c /* Capture interface cycle  register */
47 #define CAMOR  0x10 /* Capture interface offset register */
48 #define CAPWR  0x14 /* Capture interface width register */
49 #define CAIFR  0x18 /* Capture interface input format register */
50 #define CSTCR  0x20 /* Camera strobe control register (<= sh7722) */
51 #define CSECR  0x24 /* Camera strobe emission count register (<= sh7722) */
52 #define CRCNTR 0x28 /* CEU register control register */
53 #define CRCMPR 0x2c /* CEU register forcible control register */
54 #define CFLCR  0x30 /* Capture filter control register */
55 #define CFSZR  0x34 /* Capture filter size clip register */
56 #define CDWDR  0x38 /* Capture destination width register */
57 #define CDAYR  0x3c /* Capture data address Y register */
58 #define CDACR  0x40 /* Capture data address C register */
59 #define CDBYR  0x44 /* Capture data bottom-field address Y register */
60 #define CDBCR  0x48 /* Capture data bottom-field address C register */
61 #define CBDSR  0x4c /* Capture bundle destination size register */
62 #define CFWCR  0x5c /* Firewall operation control register */
63 #define CLFCR  0x60 /* Capture low-pass filter control register */
64 #define CDOCR  0x64 /* Capture data output control register */
65 #define CDDCR  0x68 /* Capture data complexity level register */
66 #define CDDAR  0x6c /* Capture data complexity level address register */
67 #define CEIER  0x70 /* Capture event interrupt enable register */
68 #define CETCR  0x74 /* Capture event flag clear register */
69 #define CSTSR  0x7c /* Capture status register */
70 #define CSRTR  0x80 /* Capture software reset register */
71 #define CDSSR  0x84 /* Capture data size register */
72 #define CDAYR2 0x90 /* Capture data address Y register 2 */
73 #define CDACR2 0x94 /* Capture data address C register 2 */
74 #define CDBYR2 0x98 /* Capture data bottom-field address Y register 2 */
75 #define CDBCR2 0x9c /* Capture data bottom-field address C register 2 */
76
77 /* per video frame buffer */
78 struct sh_mobile_ceu_buffer {
79         struct videobuf_buffer vb; /* v4l buffer must be first */
80         const struct soc_camera_data_format *fmt;
81 };
82
83 struct sh_mobile_ceu_dev {
84         struct soc_camera_host ici;
85         struct soc_camera_device *icd;
86
87         unsigned int irq;
88         void __iomem *base;
89         unsigned long video_limit;
90
91         /* lock used to protect videobuf */
92         spinlock_t lock;
93         struct list_head capture;
94         struct videobuf_buffer *active;
95
96         struct sh_mobile_ceu_info *pdata;
97
98         u32 cflcr;
99
100         unsigned int is_interlaced:1;
101         unsigned int image_mode:1;
102         unsigned int is_16bit:1;
103 };
104
105 struct sh_mobile_ceu_cam {
106         struct v4l2_rect camera_rect;
107         struct v4l2_rect camera_max;
108         const struct soc_camera_data_format *extra_fmt;
109         const struct soc_camera_data_format *camera_fmt;
110 };
111
112 static unsigned long make_bus_param(struct sh_mobile_ceu_dev *pcdev)
113 {
114         unsigned long flags;
115
116         flags = SOCAM_MASTER |
117                 SOCAM_PCLK_SAMPLE_RISING |
118                 SOCAM_HSYNC_ACTIVE_HIGH |
119                 SOCAM_HSYNC_ACTIVE_LOW |
120                 SOCAM_VSYNC_ACTIVE_HIGH |
121                 SOCAM_VSYNC_ACTIVE_LOW |
122                 SOCAM_DATA_ACTIVE_HIGH;
123
124         if (pcdev->pdata->flags & SH_CEU_FLAG_USE_8BIT_BUS)
125                 flags |= SOCAM_DATAWIDTH_8;
126
127         if (pcdev->pdata->flags & SH_CEU_FLAG_USE_16BIT_BUS)
128                 flags |= SOCAM_DATAWIDTH_16;
129
130         if (flags & SOCAM_DATAWIDTH_MASK)
131                 return flags;
132
133         return 0;
134 }
135
136 static void ceu_write(struct sh_mobile_ceu_dev *priv,
137                       unsigned long reg_offs, u32 data)
138 {
139         iowrite32(data, priv->base + reg_offs);
140 }
141
142 static u32 ceu_read(struct sh_mobile_ceu_dev *priv, unsigned long reg_offs)
143 {
144         return ioread32(priv->base + reg_offs);
145 }
146
147 /*
148  *  Videobuf operations
149  */
150 static int sh_mobile_ceu_videobuf_setup(struct videobuf_queue *vq,
151                                         unsigned int *count,
152                                         unsigned int *size)
153 {
154         struct soc_camera_device *icd = vq->priv_data;
155         struct soc_camera_host *ici = to_soc_camera_host(icd->dev.parent);
156         struct sh_mobile_ceu_dev *pcdev = ici->priv;
157         int bytes_per_pixel = (icd->current_fmt->depth + 7) >> 3;
158
159         *size = PAGE_ALIGN(icd->rect_current.width * icd->rect_current.height *
160                            bytes_per_pixel);
161
162         if (0 == *count)
163                 *count = 2;
164
165         if (pcdev->video_limit) {
166                 while (*size * *count > pcdev->video_limit)
167                         (*count)--;
168         }
169
170         dev_dbg(&icd->dev, "count=%d, size=%d\n", *count, *size);
171
172         return 0;
173 }
174
175 static void free_buffer(struct videobuf_queue *vq,
176                         struct sh_mobile_ceu_buffer *buf)
177 {
178         struct soc_camera_device *icd = vq->priv_data;
179
180         dev_dbg(&icd->dev, "%s (vb=0x%p) 0x%08lx %zd\n", __func__,
181                 &buf->vb, buf->vb.baddr, buf->vb.bsize);
182
183         if (in_interrupt())
184                 BUG();
185
186         videobuf_waiton(&buf->vb, 0, 0);
187         videobuf_dma_contig_free(vq, &buf->vb);
188         dev_dbg(&icd->dev, "%s freed\n", __func__);
189         buf->vb.state = VIDEOBUF_NEEDS_INIT;
190 }
191
192 #define CEU_CETCR_MAGIC 0x0317f313 /* acknowledge magical interrupt sources */
193 #define CEU_CETCR_IGRW (1 << 4) /* prohibited register access interrupt bit */
194 #define CEU_CEIER_CPEIE (1 << 0) /* one-frame capture end interrupt */
195 #define CEU_CAPCR_CTNCP (1 << 16) /* continuous capture mode (if set) */
196
197
198 static void sh_mobile_ceu_capture(struct sh_mobile_ceu_dev *pcdev)
199 {
200         struct soc_camera_device *icd = pcdev->icd;
201         dma_addr_t phys_addr_top, phys_addr_bottom;
202
203         /* The hardware is _very_ picky about this sequence. Especially
204          * the CEU_CETCR_MAGIC value. It seems like we need to acknowledge
205          * several not-so-well documented interrupt sources in CETCR.
206          */
207         ceu_write(pcdev, CEIER, ceu_read(pcdev, CEIER) & ~CEU_CEIER_CPEIE);
208         ceu_write(pcdev, CETCR, ~ceu_read(pcdev, CETCR) & CEU_CETCR_MAGIC);
209         ceu_write(pcdev, CEIER, ceu_read(pcdev, CEIER) | CEU_CEIER_CPEIE);
210         ceu_write(pcdev, CAPCR, ceu_read(pcdev, CAPCR) & ~CEU_CAPCR_CTNCP);
211         ceu_write(pcdev, CETCR, CEU_CETCR_MAGIC ^ CEU_CETCR_IGRW);
212
213         if (!pcdev->active)
214                 return;
215
216         phys_addr_top = videobuf_to_dma_contig(pcdev->active);
217         ceu_write(pcdev, CDAYR, phys_addr_top);
218         if (pcdev->is_interlaced) {
219                 phys_addr_bottom = phys_addr_top + icd->rect_current.width;
220                 ceu_write(pcdev, CDBYR, phys_addr_bottom);
221         }
222
223         switch (icd->current_fmt->fourcc) {
224         case V4L2_PIX_FMT_NV12:
225         case V4L2_PIX_FMT_NV21:
226         case V4L2_PIX_FMT_NV16:
227         case V4L2_PIX_FMT_NV61:
228                 phys_addr_top += icd->rect_current.width *
229                         icd->rect_current.height;
230                 ceu_write(pcdev, CDACR, phys_addr_top);
231                 if (pcdev->is_interlaced) {
232                         phys_addr_bottom = phys_addr_top +
233                                 icd->rect_current.width;
234                         ceu_write(pcdev, CDBCR, phys_addr_bottom);
235                 }
236         }
237
238         pcdev->active->state = VIDEOBUF_ACTIVE;
239         ceu_write(pcdev, CAPSR, 0x1); /* start capture */
240 }
241
242 static int sh_mobile_ceu_videobuf_prepare(struct videobuf_queue *vq,
243                                           struct videobuf_buffer *vb,
244                                           enum v4l2_field field)
245 {
246         struct soc_camera_device *icd = vq->priv_data;
247         struct sh_mobile_ceu_buffer *buf;
248         int ret;
249
250         buf = container_of(vb, struct sh_mobile_ceu_buffer, vb);
251
252         dev_dbg(&icd->dev, "%s (vb=0x%p) 0x%08lx %zd\n", __func__,
253                 vb, vb->baddr, vb->bsize);
254
255         /* Added list head initialization on alloc */
256         WARN_ON(!list_empty(&vb->queue));
257
258 #ifdef DEBUG
259         /* This can be useful if you want to see if we actually fill
260          * the buffer with something */
261         memset((void *)vb->baddr, 0xaa, vb->bsize);
262 #endif
263
264         BUG_ON(NULL == icd->current_fmt);
265
266         if (buf->fmt    != icd->current_fmt ||
267             vb->width   != icd->rect_current.width ||
268             vb->height  != icd->rect_current.height ||
269             vb->field   != field) {
270                 buf->fmt        = icd->current_fmt;
271                 vb->width       = icd->rect_current.width;
272                 vb->height      = icd->rect_current.height;
273                 vb->field       = field;
274                 vb->state       = VIDEOBUF_NEEDS_INIT;
275         }
276
277         vb->size = vb->width * vb->height * ((buf->fmt->depth + 7) >> 3);
278         if (0 != vb->baddr && vb->bsize < vb->size) {
279                 ret = -EINVAL;
280                 goto out;
281         }
282
283         if (vb->state == VIDEOBUF_NEEDS_INIT) {
284                 ret = videobuf_iolock(vq, vb, NULL);
285                 if (ret)
286                         goto fail;
287                 vb->state = VIDEOBUF_PREPARED;
288         }
289
290         return 0;
291 fail:
292         free_buffer(vq, buf);
293 out:
294         return ret;
295 }
296
297 /* Called under spinlock_irqsave(&pcdev->lock, ...) */
298 static void sh_mobile_ceu_videobuf_queue(struct videobuf_queue *vq,
299                                          struct videobuf_buffer *vb)
300 {
301         struct soc_camera_device *icd = vq->priv_data;
302         struct soc_camera_host *ici = to_soc_camera_host(icd->dev.parent);
303         struct sh_mobile_ceu_dev *pcdev = ici->priv;
304
305         dev_dbg(&icd->dev, "%s (vb=0x%p) 0x%08lx %zd\n", __func__,
306                 vb, vb->baddr, vb->bsize);
307
308         vb->state = VIDEOBUF_QUEUED;
309         list_add_tail(&vb->queue, &pcdev->capture);
310
311         if (!pcdev->active) {
312                 pcdev->active = vb;
313                 sh_mobile_ceu_capture(pcdev);
314         }
315 }
316
317 static void sh_mobile_ceu_videobuf_release(struct videobuf_queue *vq,
318                                            struct videobuf_buffer *vb)
319 {
320         struct soc_camera_device *icd = vq->priv_data;
321         struct soc_camera_host *ici = to_soc_camera_host(icd->dev.parent);
322         struct sh_mobile_ceu_dev *pcdev = ici->priv;
323         unsigned long flags;
324
325         spin_lock_irqsave(&pcdev->lock, flags);
326
327         if (pcdev->active == vb) {
328                 /* disable capture (release DMA buffer), reset */
329                 ceu_write(pcdev, CAPSR, 1 << 16);
330                 pcdev->active = NULL;
331         }
332
333         if ((vb->state == VIDEOBUF_ACTIVE || vb->state == VIDEOBUF_QUEUED) &&
334             !list_empty(&vb->queue)) {
335                 vb->state = VIDEOBUF_ERROR;
336                 list_del_init(&vb->queue);
337         }
338
339         spin_unlock_irqrestore(&pcdev->lock, flags);
340
341         free_buffer(vq, container_of(vb, struct sh_mobile_ceu_buffer, vb));
342 }
343
344 static struct videobuf_queue_ops sh_mobile_ceu_videobuf_ops = {
345         .buf_setup      = sh_mobile_ceu_videobuf_setup,
346         .buf_prepare    = sh_mobile_ceu_videobuf_prepare,
347         .buf_queue      = sh_mobile_ceu_videobuf_queue,
348         .buf_release    = sh_mobile_ceu_videobuf_release,
349 };
350
351 static irqreturn_t sh_mobile_ceu_irq(int irq, void *data)
352 {
353         struct sh_mobile_ceu_dev *pcdev = data;
354         struct videobuf_buffer *vb;
355         unsigned long flags;
356
357         spin_lock_irqsave(&pcdev->lock, flags);
358
359         vb = pcdev->active;
360         if (!vb)
361                 /* Stale interrupt from a released buffer */
362                 goto out;
363
364         list_del_init(&vb->queue);
365
366         if (!list_empty(&pcdev->capture))
367                 pcdev->active = list_entry(pcdev->capture.next,
368                                            struct videobuf_buffer, queue);
369         else
370                 pcdev->active = NULL;
371
372         sh_mobile_ceu_capture(pcdev);
373
374         vb->state = VIDEOBUF_DONE;
375         do_gettimeofday(&vb->ts);
376         vb->field_count++;
377         wake_up(&vb->done);
378
379 out:
380         spin_unlock_irqrestore(&pcdev->lock, flags);
381
382         return IRQ_HANDLED;
383 }
384
385 /* Called with .video_lock held */
386 static int sh_mobile_ceu_add_device(struct soc_camera_device *icd)
387 {
388         struct soc_camera_host *ici = to_soc_camera_host(icd->dev.parent);
389         struct sh_mobile_ceu_dev *pcdev = ici->priv;
390
391         if (pcdev->icd)
392                 return -EBUSY;
393
394         dev_info(&icd->dev,
395                  "SuperH Mobile CEU driver attached to camera %d\n",
396                  icd->devnum);
397
398         clk_enable(pcdev->clk);
399
400         ceu_write(pcdev, CAPSR, 1 << 16); /* reset */
401         while (ceu_read(pcdev, CSTSR) & 1)
402                 msleep(1);
403
404         pcdev->icd = icd;
405
406         return 0;
407 }
408
409 /* Called with .video_lock held */
410 static void sh_mobile_ceu_remove_device(struct soc_camera_device *icd)
411 {
412         struct soc_camera_host *ici = to_soc_camera_host(icd->dev.parent);
413         struct sh_mobile_ceu_dev *pcdev = ici->priv;
414         unsigned long flags;
415
416         BUG_ON(icd != pcdev->icd);
417
418         /* disable capture, disable interrupts */
419         ceu_write(pcdev, CEIER, 0);
420         ceu_write(pcdev, CAPSR, 1 << 16); /* reset */
421
422         /* make sure active buffer is canceled */
423         spin_lock_irqsave(&pcdev->lock, flags);
424         if (pcdev->active) {
425                 list_del(&pcdev->active->queue);
426                 pcdev->active->state = VIDEOBUF_ERROR;
427                 wake_up_all(&pcdev->active->done);
428                 pcdev->active = NULL;
429         }
430         spin_unlock_irqrestore(&pcdev->lock, flags);
431
432         clk_disable(pcdev->clk);
433
434         dev_info(&icd->dev,
435                  "SuperH Mobile CEU driver detached from camera %d\n",
436                  icd->devnum);
437
438         pcdev->icd = NULL;
439 }
440
441 /*
442  * See chapter 29.4.12 "Capture Filter Control Register (CFLCR)"
443  * in SH7722 Hardware Manual
444  */
445 static unsigned int size_dst(unsigned int src, unsigned int scale)
446 {
447         unsigned int mant_pre = scale >> 12;
448         if (!src || !scale)
449                 return src;
450         return ((mant_pre + 2 * (src - 1)) / (2 * mant_pre) - 1) *
451                 mant_pre * 4096 / scale + 1;
452 }
453
454 static unsigned int size_src(unsigned int dst, unsigned int scale)
455 {
456         unsigned int mant_pre = scale >> 12, tmp;
457         if (!dst || !scale)
458                 return dst;
459         for (tmp = ((dst - 1) * scale + 2048 * mant_pre) / 4096 + 1;
460              size_dst(tmp, scale) < dst;
461              tmp++)
462                 ;
463         return tmp;
464 }
465
466 static u16 calc_scale(unsigned int src, unsigned int *dst)
467 {
468         u16 scale;
469
470         if (src == *dst)
471                 return 0;
472
473         scale = (src * 4096 / *dst) & ~7;
474
475         while (scale > 4096 && size_dst(src, scale) < *dst)
476                 scale -= 8;
477
478         *dst = size_dst(src, scale);
479
480         return scale;
481 }
482
483 /* rect is guaranteed to not exceed the scaled camera rectangle */
484 static void sh_mobile_ceu_set_rect(struct soc_camera_device *icd,
485                                    struct v4l2_rect *rect)
486 {
487         struct soc_camera_host *ici = to_soc_camera_host(icd->dev.parent);
488         struct sh_mobile_ceu_cam *cam = icd->host_priv;
489         struct sh_mobile_ceu_dev *pcdev = ici->priv;
490         int width, height, cfszr_width, cdwdr_width, in_width, in_height;
491         unsigned int left_offset, top_offset, left, top;
492         unsigned int hscale = pcdev->cflcr & 0xffff;
493         unsigned int vscale = (pcdev->cflcr >> 16) & 0xffff;
494         u32 camor;
495
496         /* Switch to the camera scale */
497         left = size_src(rect->left, hscale);
498         top = size_src(rect->top, vscale);
499
500         dev_dbg(&icd->dev, "Left %u * 0x%x = %u, top %u * 0x%x = %u\n",
501                 rect->left, hscale, left, rect->top, vscale, top);
502
503         if (left > cam->camera_rect.left) {
504                 left_offset = left - cam->camera_rect.left;
505         } else {
506                 left_offset = 0;
507                 left = cam->camera_rect.left;
508         }
509
510         if (top > cam->camera_rect.top) {
511                 top_offset = top - cam->camera_rect.top;
512         } else {
513                 top_offset = 0;
514                 top = cam->camera_rect.top;
515         }
516
517         dev_dbg(&icd->dev, "New left %u, top %u, offsets %u:%u\n",
518                 rect->left, rect->top, left_offset, top_offset);
519
520         if (pcdev->image_mode) {
521                 width = rect->width;
522                 in_width = cam->camera_rect.width;
523                 if (!pcdev->is_16bit) {
524                         width *= 2;
525                         in_width *= 2;
526                         left_offset *= 2;
527                 }
528                 cfszr_width = cdwdr_width = rect->width;
529         } else {
530                 unsigned int w_factor = (icd->current_fmt->depth + 7) >> 3;
531                 if (!pcdev->is_16bit)
532                         w_factor *= 2;
533
534                 width = rect->width * w_factor / 2;
535                 in_width = cam->camera_rect.width * w_factor / 2;
536                 left_offset = left_offset * w_factor / 2;
537
538                 cfszr_width = pcdev->is_16bit ? width : width / 2;
539                 cdwdr_width = pcdev->is_16bit ? width * 2 : width;
540         }
541
542         height = rect->height;
543         in_height = cam->camera_rect.height;
544         if (pcdev->is_interlaced) {
545                 height /= 2;
546                 in_height /= 2;
547                 top_offset /= 2;
548                 cdwdr_width *= 2;
549         }
550
551         camor = left_offset | (top_offset << 16);
552         ceu_write(pcdev, CAMOR, camor);
553         ceu_write(pcdev, CAPWR, (in_height << 16) | in_width);
554         ceu_write(pcdev, CFSZR, (height << 16) | cfszr_width);
555         ceu_write(pcdev, CDWDR, cdwdr_width);
556 }
557
558 static u32 capture_save_reset(struct sh_mobile_ceu_dev *pcdev)
559 {
560         u32 capsr = ceu_read(pcdev, CAPSR);
561         ceu_write(pcdev, CAPSR, 1 << 16); /* reset, stop capture */
562         return capsr;
563 }
564
565 static void capture_restore(struct sh_mobile_ceu_dev *pcdev, u32 capsr)
566 {
567         unsigned long timeout = jiffies + 10 * HZ;
568
569         /*
570          * Wait until the end of the current frame. It can take a long time,
571          * but if it has been aborted by a CAPSR reset, it shoule exit sooner.
572          */
573         while ((ceu_read(pcdev, CSTSR) & 1) && time_before(jiffies, timeout))
574                 msleep(1);
575
576         if (time_after(jiffies, timeout)) {
577                 dev_err(pcdev->ici.v4l2_dev.dev,
578                         "Timeout waiting for frame end! Interface problem?\n");
579                 return;
580         }
581
582         /* Wait until reset clears, this shall not hang... */
583         while (ceu_read(pcdev, CAPSR) & (1 << 16))
584                 udelay(10);
585
586         /* Anything to restore? */
587         if (capsr & ~(1 << 16))
588                 ceu_write(pcdev, CAPSR, capsr);
589 }
590
591 static int sh_mobile_ceu_set_bus_param(struct soc_camera_device *icd,
592                                        __u32 pixfmt)
593 {
594         struct soc_camera_host *ici = to_soc_camera_host(icd->dev.parent);
595         struct sh_mobile_ceu_dev *pcdev = ici->priv;
596         int ret;
597         unsigned long camera_flags, common_flags, value;
598         int yuv_lineskip;
599         struct sh_mobile_ceu_cam *cam = icd->host_priv;
600         u32 capsr = capture_save_reset(pcdev);
601
602         camera_flags = icd->ops->query_bus_param(icd);
603         common_flags = soc_camera_bus_param_compatible(camera_flags,
604                                                        make_bus_param(pcdev));
605         if (!common_flags)
606                 return -EINVAL;
607
608         ret = icd->ops->set_bus_param(icd, common_flags);
609         if (ret < 0)
610                 return ret;
611
612         switch (common_flags & SOCAM_DATAWIDTH_MASK) {
613         case SOCAM_DATAWIDTH_8:
614                 pcdev->is_16bit = 0;
615                 break;
616         case SOCAM_DATAWIDTH_16:
617                 pcdev->is_16bit = 1;
618                 break;
619         default:
620                 return -EINVAL;
621         }
622
623         ceu_write(pcdev, CRCNTR, 0);
624         ceu_write(pcdev, CRCMPR, 0);
625
626         value = 0x00000010; /* data fetch by default */
627         yuv_lineskip = 0;
628
629         switch (icd->current_fmt->fourcc) {
630         case V4L2_PIX_FMT_NV12:
631         case V4L2_PIX_FMT_NV21:
632                 yuv_lineskip = 1; /* skip for NV12/21, no skip for NV16/61 */
633                 /* fall-through */
634         case V4L2_PIX_FMT_NV16:
635         case V4L2_PIX_FMT_NV61:
636                 switch (cam->camera_fmt->fourcc) {
637                 case V4L2_PIX_FMT_UYVY:
638                         value = 0x00000000; /* Cb0, Y0, Cr0, Y1 */
639                         break;
640                 case V4L2_PIX_FMT_VYUY:
641                         value = 0x00000100; /* Cr0, Y0, Cb0, Y1 */
642                         break;
643                 case V4L2_PIX_FMT_YUYV:
644                         value = 0x00000200; /* Y0, Cb0, Y1, Cr0 */
645                         break;
646                 case V4L2_PIX_FMT_YVYU:
647                         value = 0x00000300; /* Y0, Cr0, Y1, Cb0 */
648                         break;
649                 default:
650                         BUG();
651                 }
652         }
653
654         if (icd->current_fmt->fourcc == V4L2_PIX_FMT_NV21 ||
655             icd->current_fmt->fourcc == V4L2_PIX_FMT_NV61)
656                 value ^= 0x00000100; /* swap U, V to change from NV1x->NVx1 */
657
658         value |= common_flags & SOCAM_VSYNC_ACTIVE_LOW ? 1 << 1 : 0;
659         value |= common_flags & SOCAM_HSYNC_ACTIVE_LOW ? 1 << 0 : 0;
660         value |= pcdev->is_16bit ? 1 << 12 : 0;
661         ceu_write(pcdev, CAMCR, value);
662
663         ceu_write(pcdev, CAPCR, 0x00300000);
664         ceu_write(pcdev, CAIFR, pcdev->is_interlaced ? 0x101 : 0);
665
666         mdelay(1);
667         sh_mobile_ceu_set_rect(icd, &icd->rect_current);
668
669         ceu_write(pcdev, CFLCR, pcdev->cflcr);
670
671         /* A few words about byte order (observed in Big Endian mode)
672          *
673          * In data fetch mode bytes are received in chunks of 8 bytes.
674          * D0, D1, D2, D3, D4, D5, D6, D7 (D0 received first)
675          *
676          * The data is however by default written to memory in reverse order:
677          * D7, D6, D5, D4, D3, D2, D1, D0 (D7 written to lowest byte)
678          *
679          * The lowest three bits of CDOCR allows us to do swapping,
680          * using 7 we swap the data bytes to match the incoming order:
681          * D0, D1, D2, D3, D4, D5, D6, D7
682          */
683         value = 0x00000017;
684         if (yuv_lineskip)
685                 value &= ~0x00000010; /* convert 4:2:2 -> 4:2:0 */
686
687         ceu_write(pcdev, CDOCR, value);
688         ceu_write(pcdev, CFWCR, 0); /* keep "datafetch firewall" disabled */
689
690         dev_dbg(&icd->dev, "S_FMT successful for %c%c%c%c %ux%u@%u:%u\n",
691                 pixfmt & 0xff, (pixfmt >> 8) & 0xff,
692                 (pixfmt >> 16) & 0xff, (pixfmt >> 24) & 0xff,
693                 icd->rect_current.width, icd->rect_current.height,
694                 icd->rect_current.left, icd->rect_current.top);
695
696         capture_restore(pcdev, capsr);
697
698         /* not in bundle mode: skip CBDSR, CDAYR2, CDACR2, CDBYR2, CDBCR2 */
699         return 0;
700 }
701
702 static int sh_mobile_ceu_try_bus_param(struct soc_camera_device *icd)
703 {
704         struct soc_camera_host *ici = to_soc_camera_host(icd->dev.parent);
705         struct sh_mobile_ceu_dev *pcdev = ici->priv;
706         unsigned long camera_flags, common_flags;
707
708         camera_flags = icd->ops->query_bus_param(icd);
709         common_flags = soc_camera_bus_param_compatible(camera_flags,
710                                                        make_bus_param(pcdev));
711         if (!common_flags)
712                 return -EINVAL;
713
714         return 0;
715 }
716
717 static const struct soc_camera_data_format sh_mobile_ceu_formats[] = {
718         {
719                 .name           = "NV12",
720                 .depth          = 12,
721                 .fourcc         = V4L2_PIX_FMT_NV12,
722                 .colorspace     = V4L2_COLORSPACE_JPEG,
723         },
724         {
725                 .name           = "NV21",
726                 .depth          = 12,
727                 .fourcc         = V4L2_PIX_FMT_NV21,
728                 .colorspace     = V4L2_COLORSPACE_JPEG,
729         },
730         {
731                 .name           = "NV16",
732                 .depth          = 16,
733                 .fourcc         = V4L2_PIX_FMT_NV16,
734                 .colorspace     = V4L2_COLORSPACE_JPEG,
735         },
736         {
737                 .name           = "NV61",
738                 .depth          = 16,
739                 .fourcc         = V4L2_PIX_FMT_NV61,
740                 .colorspace     = V4L2_COLORSPACE_JPEG,
741         },
742 };
743
744 static int sh_mobile_ceu_get_formats(struct soc_camera_device *icd, int idx,
745                                      struct soc_camera_format_xlate *xlate)
746 {
747         struct soc_camera_host *ici = to_soc_camera_host(icd->dev.parent);
748         int ret, k, n;
749         int formats = 0;
750         struct sh_mobile_ceu_cam *cam;
751
752         ret = sh_mobile_ceu_try_bus_param(icd);
753         if (ret < 0)
754                 return 0;
755
756         if (!icd->host_priv) {
757                 cam = kzalloc(sizeof(*cam), GFP_KERNEL);
758                 if (!cam)
759                         return -ENOMEM;
760
761                 icd->host_priv = cam;
762                 cam->camera_max = icd->rect_max;
763         } else {
764                 cam = icd->host_priv;
765         }
766
767         /* Beginning of a pass */
768         if (!idx)
769                 cam->extra_fmt = NULL;
770
771         switch (icd->formats[idx].fourcc) {
772         case V4L2_PIX_FMT_UYVY:
773         case V4L2_PIX_FMT_VYUY:
774         case V4L2_PIX_FMT_YUYV:
775         case V4L2_PIX_FMT_YVYU:
776                 if (cam->extra_fmt)
777                         goto add_single_format;
778
779                 /*
780                  * Our case is simple so far: for any of the above four camera
781                  * formats we add all our four synthesized NV* formats, so,
782                  * just marking the device with a single flag suffices. If
783                  * the format generation rules are more complex, you would have
784                  * to actually hang your already added / counted formats onto
785                  * the host_priv pointer and check whether the format you're
786                  * going to add now is already there.
787                  */
788                 cam->extra_fmt = (void *)sh_mobile_ceu_formats;
789
790                 n = ARRAY_SIZE(sh_mobile_ceu_formats);
791                 formats += n;
792                 for (k = 0; xlate && k < n; k++) {
793                         xlate->host_fmt = &sh_mobile_ceu_formats[k];
794                         xlate->cam_fmt = icd->formats + idx;
795                         xlate->buswidth = icd->formats[idx].depth;
796                         xlate++;
797                         dev_dbg(ici->v4l2_dev.dev, "Providing format %s using %s\n",
798                                 sh_mobile_ceu_formats[k].name,
799                                 icd->formats[idx].name);
800                 }
801         default:
802 add_single_format:
803                 /* Generic pass-through */
804                 formats++;
805                 if (xlate) {
806                         xlate->host_fmt = icd->formats + idx;
807                         xlate->cam_fmt = icd->formats + idx;
808                         xlate->buswidth = icd->formats[idx].depth;
809                         xlate++;
810                         dev_dbg(ici->v4l2_dev.dev,
811                                 "Providing format %s in pass-through mode\n",
812                                 icd->formats[idx].name);
813                 }
814         }
815
816         return formats;
817 }
818
819 static void sh_mobile_ceu_put_formats(struct soc_camera_device *icd)
820 {
821         kfree(icd->host_priv);
822         icd->host_priv = NULL;
823 }
824
825 /* Check if any dimension of r1 is smaller than respective one of r2 */
826 static bool is_smaller(struct v4l2_rect *r1, struct v4l2_rect *r2)
827 {
828         return r1->width < r2->width || r1->height < r2->height;
829 }
830
831 /* Check if r1 fails to cover r2 */
832 static bool is_inside(struct v4l2_rect *r1, struct v4l2_rect *r2)
833 {
834         return r1->left > r2->left || r1->top > r2->top ||
835                 r1->left + r1->width < r2->left + r2->width ||
836                 r1->top + r1->height < r2->top + r2->height;
837 }
838
839 /*
840  * CEU can scale and crop, but we don't want to waste bandwidth and kill the
841  * framerate by always requesting the maximum image from the client. For
842  * cropping we also have to take care of the current scale. The common for both
843  * scaling and cropping approach is:
844  * 1. try if the client can produce exactly what requested by the user
845  * 2. if (1) failed, try to double the client image until we get one big enough
846  * 3. if (2) failed, try to request the maximum image
847  */
848 static int sh_mobile_ceu_set_crop(struct soc_camera_device *icd,
849                                   struct v4l2_crop *a)
850 {
851         struct v4l2_rect *rect = &a->c;
852         struct soc_camera_host *ici = to_soc_camera_host(icd->dev.parent);
853         struct sh_mobile_ceu_dev *pcdev = ici->priv;
854         struct v4l2_crop cam_crop;
855         struct v4l2_rect *cam_rect = &cam_crop.c, target, cam_max;
856         struct sh_mobile_ceu_cam *cam = icd->host_priv;
857         struct device *control = to_soc_camera_control(icd);
858         struct v4l2_subdev *sd = dev_get_drvdata(control);
859         unsigned int hscale = pcdev->cflcr & 0xffff;
860         unsigned int vscale = (pcdev->cflcr >> 16) & 0xffff;
861         unsigned short width, height;
862         u32 capsr;
863         int ret;
864
865         /* Scale back up into client units */
866         cam_rect->left  = size_src(rect->left, hscale);
867         cam_rect->width = size_src(rect->width, hscale);
868         cam_rect->top   = size_src(rect->top, vscale);
869         cam_rect->height        = size_src(rect->height, vscale);
870
871         target = *cam_rect;
872
873         capsr = capture_save_reset(pcdev);
874         dev_dbg(&icd->dev, "CAPSR 0x%x, CFLCR 0x%x\n", capsr, pcdev->cflcr);
875
876         /* First attempt - see if the client can deliver a perfect result */
877         ret = v4l2_subdev_call(sd, video, s_crop, &cam_crop);
878         if (!ret && !memcmp(&target, &cam_rect, sizeof(target))) {
879                 dev_dbg(&icd->dev, "Camera S_CROP successful for %ux%u@%u:%u\n",
880                         cam_rect->width, cam_rect->height,
881                         cam_rect->left, cam_rect->top);
882                 goto ceu_set_rect;
883         }
884
885         /* Try to fix cropping, that camera hasn't managed to do */
886         dev_dbg(&icd->dev, "Fix camera S_CROP %d for %ux%u@%u:%u"
887                 " to %ux%u@%u:%u\n",
888                 ret, cam_rect->width, cam_rect->height,
889                 cam_rect->left, cam_rect->top,
890                 target.width, target.height, target.left, target.top);
891
892         /*
893          * Popular special case - some cameras can only handle fixed sizes like
894          * QVGA, VGA,... Take care to avoid infinite loop.
895          */
896         width = max(cam_rect->width, 1);
897         height = max(cam_rect->height, 1);
898         cam_max.width = size_src(icd->rect_max.width, hscale);
899         cam_max.left = size_src(icd->rect_max.left, hscale);
900         cam_max.height = size_src(icd->rect_max.height, vscale);
901         cam_max.top = size_src(icd->rect_max.top, vscale);
902         while (!ret && (is_smaller(cam_rect, &target) ||
903                         is_inside(cam_rect, &target)) &&
904                cam_max.width >= width && cam_max.height >= height) {
905
906                 width *= 2;
907                 height *= 2;
908                 cam_rect->width = width;
909                 cam_rect->height = height;
910
911                 /* We do not know what the camera is capable of, play safe */
912                 if (cam_rect->left > target.left)
913                         cam_rect->left = cam_max.left;
914
915                 if (cam_rect->left + cam_rect->width < target.left + target.width)
916                         cam_rect->width = target.left + target.width -
917                                 cam_rect->left;
918
919                 if (cam_rect->top > target.top)
920                         cam_rect->top = cam_max.top;
921
922                 if (cam_rect->top + cam_rect->height < target.top + target.height)
923                         cam_rect->height = target.top + target.height -
924                                 cam_rect->top;
925
926                 if (cam_rect->width + cam_rect->left >
927                     cam_max.width + cam_max.left)
928                         cam_rect->left = max(cam_max.width + cam_max.left -
929                                              cam_rect->width, cam_max.left);
930
931                 if (cam_rect->height + cam_rect->top >
932                     cam_max.height + cam_max.top)
933                         cam_rect->top = max(cam_max.height + cam_max.top -
934                                             cam_rect->height, cam_max.top);
935
936                 ret = v4l2_subdev_call(sd, video, s_crop, &cam_crop);
937                 dev_dbg(&icd->dev, "Camera S_CROP %d for %ux%u@%u:%u\n",
938                         ret, cam_rect->width, cam_rect->height,
939                         cam_rect->left, cam_rect->top);
940         }
941
942         /*
943          * If the camera failed to configure cropping, it should not modify the
944          * rectangle
945          */
946         if ((ret < 0 && (is_smaller(&icd->rect_current, rect) ||
947                          is_inside(&icd->rect_current, rect))) ||
948             is_smaller(cam_rect, &target) || is_inside(cam_rect, &target)) {
949                 /*
950                  * The camera failed to configure a suitable cropping,
951                  * we cannot use the current rectangle, set to max
952                  */
953                 *cam_rect = cam_max;
954                 ret = v4l2_subdev_call(sd, video, s_crop, &cam_crop);
955                 dev_dbg(&icd->dev, "Camera S_CROP %d for max %ux%u@%u:%u\n",
956                         ret, cam_rect->width, cam_rect->height,
957                         cam_rect->left, cam_rect->top);
958                 if (ret < 0 && ret != -ENOIOCTLCMD)
959                         /* All failed, hopefully resume current capture */
960                         goto resume_capture;
961
962                 /* Finally, adjust the target rectangle */
963                 if (target.width > cam_rect->width)
964                         target.width = cam_rect->width;
965                 if (target.height > cam_rect->height)
966                         target.height = cam_rect->height;
967                 if (target.left + target.width > cam_rect->left + cam_rect->width)
968                         target.left = cam_rect->left + cam_rect->width -
969                                 target.width;
970                 if (target.top + target.height > cam_rect->top + cam_rect->height)
971                         target.top = cam_rect->top + cam_rect->height -
972                                 target.height;
973         }
974
975         /* We now have a rectangle, larger than requested, let's crop */
976
977         /*
978          * We have to preserve camera rectangle between close() / open(),
979          * because soc-camera core calls .set_fmt() on each first open() with
980          * last before last close() _user_ rectangle, which can be different
981          * from camera rectangle.
982          */
983         dev_dbg(&icd->dev,
984                 "SH S_CROP from %ux%u@%u:%u to %ux%u@%u:%u, scale to %ux%u@%u:%u\n",
985                 cam_rect->width, cam_rect->height, cam_rect->left, cam_rect->top,
986                 target.width, target.height, target.left, target.top,
987                 rect->width, rect->height, rect->left, rect->top);
988
989         ret = 0;
990
991 ceu_set_rect:
992         cam->camera_rect = *cam_rect;
993
994         rect->width     = size_dst(target.width, hscale);
995         rect->left      = size_dst(target.left, hscale);
996         rect->height    = size_dst(target.height, vscale);
997         rect->top       = size_dst(target.top, vscale);
998
999         sh_mobile_ceu_set_rect(icd, rect);
1000
1001 resume_capture:
1002         /* Set CAMOR, CAPWR, CFSZR, take care of CDWDR */
1003         if (pcdev->active)
1004                 capsr |= 1;
1005         capture_restore(pcdev, capsr);
1006
1007         /* Even if only camera cropping succeeded */
1008         return ret;
1009 }
1010
1011 /* Similar to set_crop multistage iterative algorithm */
1012 static int sh_mobile_ceu_set_fmt(struct soc_camera_device *icd,
1013                                  struct v4l2_format *f)
1014 {
1015         struct soc_camera_host *ici = to_soc_camera_host(icd->dev.parent);
1016         struct sh_mobile_ceu_dev *pcdev = ici->priv;
1017         struct sh_mobile_ceu_cam *cam = icd->host_priv;
1018         struct v4l2_pix_format *pix = &f->fmt.pix;
1019         __u32 pixfmt = pix->pixelformat;
1020         const struct soc_camera_format_xlate *xlate;
1021         unsigned int width = pix->width, height = pix->height, tmp_w, tmp_h;
1022         u16 vscale, hscale;
1023         int ret, is_interlaced;
1024
1025         switch (pix->field) {
1026         case V4L2_FIELD_INTERLACED:
1027                 is_interlaced = 1;
1028                 break;
1029         case V4L2_FIELD_ANY:
1030         default:
1031                 pix->field = V4L2_FIELD_NONE;
1032                 /* fall-through */
1033         case V4L2_FIELD_NONE:
1034                 is_interlaced = 0;
1035                 break;
1036         }
1037
1038         xlate = soc_camera_xlate_by_fourcc(icd, pixfmt);
1039         if (!xlate) {
1040                 dev_warn(ici->v4l2_dev.dev, "Format %x not found\n", pixfmt);
1041                 return -EINVAL;
1042         }
1043
1044         pix->pixelformat = xlate->cam_fmt->fourcc;
1045         ret = v4l2_device_call_until_err(&ici->v4l2_dev, (__u32)icd, video, s_fmt, f);
1046         pix->pixelformat = pixfmt;
1047         dev_dbg(&icd->dev, "Camera %d fmt %ux%u, requested %ux%u, max %ux%u\n",
1048                 ret, pix->width, pix->height, width, height,
1049                 icd->rect_max.width, icd->rect_max.height);
1050         if (ret < 0)
1051                 return ret;
1052
1053         switch (pixfmt) {
1054         case V4L2_PIX_FMT_NV12:
1055         case V4L2_PIX_FMT_NV21:
1056         case V4L2_PIX_FMT_NV16:
1057         case V4L2_PIX_FMT_NV61:
1058                 pcdev->image_mode = 1;
1059                 break;
1060         default:
1061                 pcdev->image_mode = 0;
1062         }
1063
1064         if ((abs(width - pix->width) < 4 && abs(height - pix->height) < 4) ||
1065             !pcdev->image_mode || is_interlaced) {
1066                 hscale = 0;
1067                 vscale = 0;
1068                 goto out;
1069         }
1070
1071         /* Camera set a format, but geometry is not precise, try to improve */
1072         /*
1073          * FIXME: when soc-camera is converted to implement traditional S_FMT
1074          * and S_CROP semantics, replace CEU limits with camera maxima
1075          */
1076         tmp_w = pix->width;
1077         tmp_h = pix->height;
1078         while ((width > tmp_w || height > tmp_h) &&
1079                tmp_w < 2560 && tmp_h < 1920) {
1080                 tmp_w = min(2 * tmp_w, (__u32)2560);
1081                 tmp_h = min(2 * tmp_h, (__u32)1920);
1082                 pix->width = tmp_w;
1083                 pix->height = tmp_h;
1084                 pix->pixelformat = xlate->cam_fmt->fourcc;
1085                 ret = v4l2_device_call_until_err(&ici->v4l2_dev, (__u32)icd,
1086                                                  video, s_fmt, f);
1087                 pix->pixelformat = pixfmt;
1088                 dev_dbg(&icd->dev, "Camera scaled to %ux%u\n",
1089                         pix->width, pix->height);
1090                 if (ret < 0) {
1091                         /* This shouldn't happen */
1092                         dev_err(&icd->dev, "Client failed to set format: %d\n",
1093                                 ret);
1094                         return ret;
1095                 }
1096         }
1097
1098         /* We cannot scale up */
1099         if (width > pix->width)
1100                 width = pix->width;
1101
1102         if (height > pix->height)
1103                 height = pix->height;
1104
1105         /* Let's rock: scale pix->{width x height} down to width x height */
1106         hscale = calc_scale(pix->width, &width);
1107         vscale = calc_scale(pix->height, &height);
1108
1109         dev_dbg(&icd->dev, "W: %u : 0x%x = %u, H: %u : 0x%x = %u\n",
1110                 pix->width, hscale, width, pix->height, vscale, height);
1111
1112 out:
1113         pcdev->cflcr = hscale | (vscale << 16);
1114
1115         icd->buswidth = xlate->buswidth;
1116         icd->current_fmt = xlate->host_fmt;
1117         cam->camera_fmt = xlate->cam_fmt;
1118         cam->camera_rect.width = pix->width;
1119         cam->camera_rect.height = pix->height;
1120
1121         icd->rect_max.left = size_dst(cam->camera_max.left, hscale);
1122         icd->rect_max.width = size_dst(cam->camera_max.width, hscale);
1123         icd->rect_max.top = size_dst(cam->camera_max.top, vscale);
1124         icd->rect_max.height = size_dst(cam->camera_max.height, vscale);
1125
1126         icd->rect_current.left = icd->rect_max.left;
1127         icd->rect_current.top = icd->rect_max.top;
1128
1129         pcdev->is_interlaced = is_interlaced;
1130
1131         pix->width = width;
1132         pix->height = height;
1133
1134         return 0;
1135 }
1136
1137 static int sh_mobile_ceu_try_fmt(struct soc_camera_device *icd,
1138                                  struct v4l2_format *f)
1139 {
1140         struct soc_camera_host *ici = to_soc_camera_host(icd->dev.parent);
1141         const struct soc_camera_format_xlate *xlate;
1142         struct v4l2_pix_format *pix = &f->fmt.pix;
1143         __u32 pixfmt = pix->pixelformat;
1144         int width, height;
1145         int ret;
1146
1147         xlate = soc_camera_xlate_by_fourcc(icd, pixfmt);
1148         if (!xlate) {
1149                 dev_warn(ici->v4l2_dev.dev, "Format %x not found\n", pixfmt);
1150                 return -EINVAL;
1151         }
1152
1153         /* FIXME: calculate using depth and bus width */
1154
1155         v4l_bound_align_image(&pix->width, 2, 2560, 1,
1156                               &pix->height, 4, 1920, 2, 0);
1157
1158         width = pix->width;
1159         height = pix->height;
1160
1161         pix->bytesperline = pix->width *
1162                 DIV_ROUND_UP(xlate->host_fmt->depth, 8);
1163         pix->sizeimage = pix->height * pix->bytesperline;
1164
1165         pix->pixelformat = xlate->cam_fmt->fourcc;
1166
1167         /* limit to sensor capabilities */
1168         ret = v4l2_device_call_until_err(&ici->v4l2_dev, (__u32)icd, video,
1169                                          try_fmt, f);
1170         pix->pixelformat = pixfmt;
1171         if (ret < 0)
1172                 return ret;
1173
1174         switch (pixfmt) {
1175         case V4L2_PIX_FMT_NV12:
1176         case V4L2_PIX_FMT_NV21:
1177         case V4L2_PIX_FMT_NV16:
1178         case V4L2_PIX_FMT_NV61:
1179                 /* FIXME: check against rect_max after converting soc-camera */
1180                 /* We can scale precisely, need a bigger image from camera */
1181                 if (pix->width < width || pix->height < height) {
1182                         int tmp_w = pix->width, tmp_h = pix->height;
1183                         pix->width = 2560;
1184                         pix->height = 1920;
1185                         ret = v4l2_device_call_until_err(&ici->v4l2_dev,
1186                                                          (__u32)icd, video,
1187                                                          try_fmt, f);
1188                         if (ret < 0) {
1189                                 /* Shouldn't actually happen... */
1190                                 dev_err(&icd->dev,
1191                                         "FIXME: try_fmt() returned %d\n", ret);
1192                                 pix->width = tmp_w;
1193                                 pix->height = tmp_h;
1194                         }
1195                 }
1196                 if (pix->width > width)
1197                         pix->width = width;
1198                 if (pix->height > height)
1199                         pix->height = height;
1200         }
1201
1202         return ret;
1203 }
1204
1205 static int sh_mobile_ceu_reqbufs(struct soc_camera_file *icf,
1206                                  struct v4l2_requestbuffers *p)
1207 {
1208         int i;
1209
1210         /* This is for locking debugging only. I removed spinlocks and now I
1211          * check whether .prepare is ever called on a linked buffer, or whether
1212          * a dma IRQ can occur for an in-work or unlinked buffer. Until now
1213          * it hadn't triggered */
1214         for (i = 0; i < p->count; i++) {
1215                 struct sh_mobile_ceu_buffer *buf;
1216
1217                 buf = container_of(icf->vb_vidq.bufs[i],
1218                                    struct sh_mobile_ceu_buffer, vb);
1219                 INIT_LIST_HEAD(&buf->vb.queue);
1220         }
1221
1222         return 0;
1223 }
1224
1225 static unsigned int sh_mobile_ceu_poll(struct file *file, poll_table *pt)
1226 {
1227         struct soc_camera_file *icf = file->private_data;
1228         struct sh_mobile_ceu_buffer *buf;
1229
1230         buf = list_entry(icf->vb_vidq.stream.next,
1231                          struct sh_mobile_ceu_buffer, vb.stream);
1232
1233         poll_wait(file, &buf->vb.done, pt);
1234
1235         if (buf->vb.state == VIDEOBUF_DONE ||
1236             buf->vb.state == VIDEOBUF_ERROR)
1237                 return POLLIN|POLLRDNORM;
1238
1239         return 0;
1240 }
1241
1242 static int sh_mobile_ceu_querycap(struct soc_camera_host *ici,
1243                                   struct v4l2_capability *cap)
1244 {
1245         strlcpy(cap->card, "SuperH_Mobile_CEU", sizeof(cap->card));
1246         cap->version = KERNEL_VERSION(0, 0, 5);
1247         cap->capabilities = V4L2_CAP_VIDEO_CAPTURE | V4L2_CAP_STREAMING;
1248         return 0;
1249 }
1250
1251 static void sh_mobile_ceu_init_videobuf(struct videobuf_queue *q,
1252                                         struct soc_camera_device *icd)
1253 {
1254         struct soc_camera_host *ici = to_soc_camera_host(icd->dev.parent);
1255         struct sh_mobile_ceu_dev *pcdev = ici->priv;
1256
1257         videobuf_queue_dma_contig_init(q,
1258                                        &sh_mobile_ceu_videobuf_ops,
1259                                        ici->v4l2_dev.dev, &pcdev->lock,
1260                                        V4L2_BUF_TYPE_VIDEO_CAPTURE,
1261                                        pcdev->is_interlaced ?
1262                                        V4L2_FIELD_INTERLACED : V4L2_FIELD_NONE,
1263                                        sizeof(struct sh_mobile_ceu_buffer),
1264                                        icd);
1265 }
1266
1267 static int sh_mobile_ceu_get_ctrl(struct soc_camera_device *icd,
1268                                   struct v4l2_control *ctrl)
1269 {
1270         struct soc_camera_host *ici = to_soc_camera_host(icd->dev.parent);
1271         struct sh_mobile_ceu_dev *pcdev = ici->priv;
1272         u32 val;
1273
1274         switch (ctrl->id) {
1275         case V4L2_CID_SHARPNESS:
1276                 val = ceu_read(pcdev, CLFCR);
1277                 ctrl->value = val ^ 1;
1278                 return 0;
1279         }
1280         return -ENOIOCTLCMD;
1281 }
1282
1283 static int sh_mobile_ceu_set_ctrl(struct soc_camera_device *icd,
1284                                   struct v4l2_control *ctrl)
1285 {
1286         struct soc_camera_host *ici = to_soc_camera_host(icd->dev.parent);
1287         struct sh_mobile_ceu_dev *pcdev = ici->priv;
1288
1289         switch (ctrl->id) {
1290         case V4L2_CID_SHARPNESS:
1291                 switch (icd->current_fmt->fourcc) {
1292                 case V4L2_PIX_FMT_NV12:
1293                 case V4L2_PIX_FMT_NV21:
1294                 case V4L2_PIX_FMT_NV16:
1295                 case V4L2_PIX_FMT_NV61:
1296                         ceu_write(pcdev, CLFCR, !ctrl->value);
1297                         return 0;
1298                 }
1299                 return -EINVAL;
1300         }
1301         return -ENOIOCTLCMD;
1302 }
1303
1304 static const struct v4l2_queryctrl sh_mobile_ceu_controls[] = {
1305         {
1306                 .id             = V4L2_CID_SHARPNESS,
1307                 .type           = V4L2_CTRL_TYPE_BOOLEAN,
1308                 .name           = "Low-pass filter",
1309                 .minimum        = 0,
1310                 .maximum        = 1,
1311                 .step           = 1,
1312                 .default_value  = 0,
1313         },
1314 };
1315
1316 static struct soc_camera_host_ops sh_mobile_ceu_host_ops = {
1317         .owner          = THIS_MODULE,
1318         .add            = sh_mobile_ceu_add_device,
1319         .remove         = sh_mobile_ceu_remove_device,
1320         .get_formats    = sh_mobile_ceu_get_formats,
1321         .put_formats    = sh_mobile_ceu_put_formats,
1322         .set_crop       = sh_mobile_ceu_set_crop,
1323         .set_fmt        = sh_mobile_ceu_set_fmt,
1324         .try_fmt        = sh_mobile_ceu_try_fmt,
1325         .set_ctrl       = sh_mobile_ceu_set_ctrl,
1326         .get_ctrl       = sh_mobile_ceu_get_ctrl,
1327         .reqbufs        = sh_mobile_ceu_reqbufs,
1328         .poll           = sh_mobile_ceu_poll,
1329         .querycap       = sh_mobile_ceu_querycap,
1330         .set_bus_param  = sh_mobile_ceu_set_bus_param,
1331         .init_videobuf  = sh_mobile_ceu_init_videobuf,
1332         .controls       = sh_mobile_ceu_controls,
1333         .num_controls   = ARRAY_SIZE(sh_mobile_ceu_controls),
1334 };
1335
1336 static int __devinit sh_mobile_ceu_probe(struct platform_device *pdev)
1337 {
1338         struct sh_mobile_ceu_dev *pcdev;
1339         struct resource *res;
1340         void __iomem *base;
1341         unsigned int irq;
1342         int err = 0;
1343
1344         res = platform_get_resource(pdev, IORESOURCE_MEM, 0);
1345         irq = platform_get_irq(pdev, 0);
1346         if (!res || !irq) {
1347                 dev_err(&pdev->dev, "Not enough CEU platform resources.\n");
1348                 err = -ENODEV;
1349                 goto exit;
1350         }
1351
1352         pcdev = kzalloc(sizeof(*pcdev), GFP_KERNEL);
1353         if (!pcdev) {
1354                 dev_err(&pdev->dev, "Could not allocate pcdev\n");
1355                 err = -ENOMEM;
1356                 goto exit;
1357         }
1358
1359         INIT_LIST_HEAD(&pcdev->capture);
1360         spin_lock_init(&pcdev->lock);
1361
1362         pcdev->pdata = pdev->dev.platform_data;
1363         if (!pcdev->pdata) {
1364                 err = -EINVAL;
1365                 dev_err(&pdev->dev, "CEU platform data not set.\n");
1366                 goto exit_kfree;
1367         }
1368
1369         base = ioremap_nocache(res->start, resource_size(res));
1370         if (!base) {
1371                 err = -ENXIO;
1372                 dev_err(&pdev->dev, "Unable to ioremap CEU registers.\n");
1373                 goto exit_kfree;
1374         }
1375
1376         pcdev->irq = irq;
1377         pcdev->base = base;
1378         pcdev->video_limit = 0; /* only enabled if second resource exists */
1379
1380         res = platform_get_resource(pdev, IORESOURCE_MEM, 1);
1381         if (res) {
1382                 err = dma_declare_coherent_memory(&pdev->dev, res->start,
1383                                                   res->start,
1384                                                   resource_size(res),
1385                                                   DMA_MEMORY_MAP |
1386                                                   DMA_MEMORY_EXCLUSIVE);
1387                 if (!err) {
1388                         dev_err(&pdev->dev, "Unable to declare CEU memory.\n");
1389                         err = -ENXIO;
1390                         goto exit_iounmap;
1391                 }
1392
1393                 pcdev->video_limit = resource_size(res);
1394         }
1395
1396         /* request irq */
1397         err = request_irq(pcdev->irq, sh_mobile_ceu_irq, IRQF_DISABLED,
1398                           dev_name(&pdev->dev), pcdev);
1399         if (err) {
1400                 dev_err(&pdev->dev, "Unable to register CEU interrupt.\n");
1401                 goto exit_release_mem;
1402         }
1403
1404         pm_suspend_ignore_children(&pdev->dev, true);
1405         pm_runtime_enable(&pdev->dev);
1406         pm_runtime_resume(&pdev->dev);
1407
1408         pcdev->ici.priv = pcdev;
1409         pcdev->ici.v4l2_dev.dev = &pdev->dev;
1410         pcdev->ici.nr = pdev->id;
1411         pcdev->ici.drv_name = dev_name(&pdev->dev);
1412         pcdev->ici.ops = &sh_mobile_ceu_host_ops;
1413
1414         err = soc_camera_host_register(&pcdev->ici);
1415         if (err)
1416                 goto exit_free_irq;
1417
1418         return 0;
1419
1420 exit_free_irq:
1421         free_irq(pcdev->irq, pcdev);
1422 exit_release_mem:
1423         if (platform_get_resource(pdev, IORESOURCE_MEM, 1))
1424                 dma_release_declared_memory(&pdev->dev);
1425 exit_iounmap:
1426         iounmap(base);
1427 exit_kfree:
1428         kfree(pcdev);
1429 exit:
1430         return err;
1431 }
1432
1433 static int __devexit sh_mobile_ceu_remove(struct platform_device *pdev)
1434 {
1435         struct soc_camera_host *soc_host = to_soc_camera_host(&pdev->dev);
1436         struct sh_mobile_ceu_dev *pcdev = container_of(soc_host,
1437                                         struct sh_mobile_ceu_dev, ici);
1438
1439         soc_camera_host_unregister(soc_host);
1440         free_irq(pcdev->irq, pcdev);
1441         if (platform_get_resource(pdev, IORESOURCE_MEM, 1))
1442                 dma_release_declared_memory(&pdev->dev);
1443         iounmap(pcdev->base);
1444         kfree(pcdev);
1445         return 0;
1446 }
1447
1448 static int sh_mobile_ceu_runtime_nop(struct device *dev)
1449 {
1450         /* Runtime PM callback shared between ->runtime_suspend()
1451          * and ->runtime_resume(). Simply returns success.
1452          *
1453          * This driver re-initializes all registers after
1454          * pm_runtime_get_sync() anyway so there is no need
1455          * to save and restore registers here.
1456          */
1457         return 0;
1458 }
1459
1460 static struct dev_pm_ops sh_mobile_ceu_dev_pm_ops = {
1461         .runtime_suspend = sh_mobile_ceu_runtime_nop,
1462         .runtime_resume = sh_mobile_ceu_runtime_nop,
1463 };
1464
1465 static struct platform_driver sh_mobile_ceu_driver = {
1466         .driver         = {
1467                 .name   = "sh_mobile_ceu",
1468                 .pm     = &sh_mobile_ceu_dev_pm_ops,
1469         },
1470         .probe          = sh_mobile_ceu_probe,
1471         .remove         = __exit_p(sh_mobile_ceu_remove),
1472 };
1473
1474 static int __init sh_mobile_ceu_init(void)
1475 {
1476         return platform_driver_register(&sh_mobile_ceu_driver);
1477 }
1478
1479 static void __exit sh_mobile_ceu_exit(void)
1480 {
1481         platform_driver_unregister(&sh_mobile_ceu_driver);
1482 }
1483
1484 module_init(sh_mobile_ceu_init);
1485 module_exit(sh_mobile_ceu_exit);
1486
1487 MODULE_DESCRIPTION("SuperH Mobile CEU driver");
1488 MODULE_AUTHOR("Magnus Damm");
1489 MODULE_LICENSE("GPL");
1490 MODULE_ALIAS("platform:sh_mobile_ceu");