2 * V4L2 Driver for SuperH Mobile CEU interface
4 * Copyright (C) 2008 Magnus Damm
6 * Based on V4L2 Driver for PXA camera host - "pxa_camera.c",
8 * Copyright (C) 2006, Sascha Hauer, Pengutronix
9 * Copyright (C) 2008, Guennadi Liakhovetski <kernel@pengutronix.de>
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.
17 #include <linux/init.h>
18 #include <linux/module.h>
20 #include <linux/delay.h>
21 #include <linux/dma-mapping.h>
22 #include <linux/errno.h>
24 #include <linux/interrupt.h>
25 #include <linux/kernel.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 #include <linux/sched.h>
36 #include <media/v4l2-common.h>
37 #include <media/v4l2-dev.h>
38 #include <media/soc_camera.h>
39 #include <media/sh_mobile_ceu.h>
40 #include <media/videobuf-dma-contig.h>
42 /* register offsets for sh7722 / sh7723 */
44 #define CAPSR 0x00 /* Capture start register */
45 #define CAPCR 0x04 /* Capture control register */
46 #define CAMCR 0x08 /* Capture interface control register */
47 #define CMCYR 0x0c /* Capture interface cycle register */
48 #define CAMOR 0x10 /* Capture interface offset register */
49 #define CAPWR 0x14 /* Capture interface width register */
50 #define CAIFR 0x18 /* Capture interface input format register */
51 #define CSTCR 0x20 /* Camera strobe control register (<= sh7722) */
52 #define CSECR 0x24 /* Camera strobe emission count register (<= sh7722) */
53 #define CRCNTR 0x28 /* CEU register control register */
54 #define CRCMPR 0x2c /* CEU register forcible control register */
55 #define CFLCR 0x30 /* Capture filter control register */
56 #define CFSZR 0x34 /* Capture filter size clip register */
57 #define CDWDR 0x38 /* Capture destination width register */
58 #define CDAYR 0x3c /* Capture data address Y register */
59 #define CDACR 0x40 /* Capture data address C register */
60 #define CDBYR 0x44 /* Capture data bottom-field address Y register */
61 #define CDBCR 0x48 /* Capture data bottom-field address C register */
62 #define CBDSR 0x4c /* Capture bundle destination size register */
63 #define CFWCR 0x5c /* Firewall operation control register */
64 #define CLFCR 0x60 /* Capture low-pass filter control register */
65 #define CDOCR 0x64 /* Capture data output control register */
66 #define CDDCR 0x68 /* Capture data complexity level register */
67 #define CDDAR 0x6c /* Capture data complexity level address register */
68 #define CEIER 0x70 /* Capture event interrupt enable register */
69 #define CETCR 0x74 /* Capture event flag clear register */
70 #define CSTSR 0x7c /* Capture status register */
71 #define CSRTR 0x80 /* Capture software reset register */
72 #define CDSSR 0x84 /* Capture data size register */
73 #define CDAYR2 0x90 /* Capture data address Y register 2 */
74 #define CDACR2 0x94 /* Capture data address C register 2 */
75 #define CDBYR2 0x98 /* Capture data bottom-field address Y register 2 */
76 #define CDBCR2 0x9c /* Capture data bottom-field address C register 2 */
80 #define dev_geo dev_info
82 #define dev_geo dev_dbg
85 /* per video frame buffer */
86 struct sh_mobile_ceu_buffer
{
87 struct videobuf_buffer vb
; /* v4l buffer must be first */
88 const struct soc_camera_data_format
*fmt
;
91 struct sh_mobile_ceu_dev
{
92 struct soc_camera_host ici
;
93 struct soc_camera_device
*icd
;
97 unsigned long video_limit
;
99 /* lock used to protect videobuf */
101 struct list_head capture
;
102 struct videobuf_buffer
*active
;
104 struct sh_mobile_ceu_info
*pdata
;
108 unsigned int is_interlaced
:1;
109 unsigned int image_mode
:1;
110 unsigned int is_16bit
:1;
113 struct sh_mobile_ceu_cam
{
114 struct v4l2_rect ceu_rect
;
115 unsigned int cam_width
;
116 unsigned int cam_height
;
117 const struct soc_camera_data_format
*extra_fmt
;
118 const struct soc_camera_data_format
*camera_fmt
;
121 static unsigned long make_bus_param(struct sh_mobile_ceu_dev
*pcdev
)
125 flags
= SOCAM_MASTER
|
126 SOCAM_PCLK_SAMPLE_RISING
|
127 SOCAM_HSYNC_ACTIVE_HIGH
|
128 SOCAM_HSYNC_ACTIVE_LOW
|
129 SOCAM_VSYNC_ACTIVE_HIGH
|
130 SOCAM_VSYNC_ACTIVE_LOW
|
131 SOCAM_DATA_ACTIVE_HIGH
;
133 if (pcdev
->pdata
->flags
& SH_CEU_FLAG_USE_8BIT_BUS
)
134 flags
|= SOCAM_DATAWIDTH_8
;
136 if (pcdev
->pdata
->flags
& SH_CEU_FLAG_USE_16BIT_BUS
)
137 flags
|= SOCAM_DATAWIDTH_16
;
139 if (flags
& SOCAM_DATAWIDTH_MASK
)
145 static void ceu_write(struct sh_mobile_ceu_dev
*priv
,
146 unsigned long reg_offs
, u32 data
)
148 iowrite32(data
, priv
->base
+ reg_offs
);
151 static u32
ceu_read(struct sh_mobile_ceu_dev
*priv
, unsigned long reg_offs
)
153 return ioread32(priv
->base
+ reg_offs
);
156 static int sh_mobile_ceu_soft_reset(struct sh_mobile_ceu_dev
*pcdev
)
159 struct soc_camera_device
*icd
= pcdev
->icd
;
161 ceu_write(pcdev
, CAPSR
, 1 << 16); /* reset */
163 /* wait CSTSR.CPTON bit */
164 for (i
= 0; i
< 1000; i
++) {
165 if (!(ceu_read(pcdev
, CSTSR
) & 1)) {
172 /* wait CAPSR.CPKIL bit */
173 for (i
= 0; i
< 1000; i
++) {
174 if (!(ceu_read(pcdev
, CAPSR
) & (1 << 16))) {
183 dev_warn(&icd
->dev
, "soft reset time out\n");
191 * Videobuf operations
193 static int sh_mobile_ceu_videobuf_setup(struct videobuf_queue
*vq
,
197 struct soc_camera_device
*icd
= vq
->priv_data
;
198 struct soc_camera_host
*ici
= to_soc_camera_host(icd
->dev
.parent
);
199 struct sh_mobile_ceu_dev
*pcdev
= ici
->priv
;
200 int bytes_per_pixel
= (icd
->current_fmt
->depth
+ 7) >> 3;
202 *size
= PAGE_ALIGN(icd
->user_width
* icd
->user_height
*
208 if (pcdev
->video_limit
) {
209 while (*size
* *count
> pcdev
->video_limit
)
213 dev_dbg(icd
->dev
.parent
, "count=%d, size=%d\n", *count
, *size
);
218 static void free_buffer(struct videobuf_queue
*vq
,
219 struct sh_mobile_ceu_buffer
*buf
)
221 struct soc_camera_device
*icd
= vq
->priv_data
;
222 struct device
*dev
= icd
->dev
.parent
;
224 dev_dbg(dev
, "%s (vb=0x%p) 0x%08lx %zd\n", __func__
,
225 &buf
->vb
, buf
->vb
.baddr
, buf
->vb
.bsize
);
230 videobuf_waiton(&buf
->vb
, 0, 0);
231 videobuf_dma_contig_free(vq
, &buf
->vb
);
232 dev_dbg(dev
, "%s freed\n", __func__
);
233 buf
->vb
.state
= VIDEOBUF_NEEDS_INIT
;
236 #define CEU_CETCR_MAGIC 0x0317f313 /* acknowledge magical interrupt sources */
237 #define CEU_CETCR_IGRW (1 << 4) /* prohibited register access interrupt bit */
238 #define CEU_CEIER_CPEIE (1 << 0) /* one-frame capture end interrupt */
239 #define CEU_CEIER_VBP (1 << 20) /* vbp error */
240 #define CEU_CAPCR_CTNCP (1 << 16) /* continuous capture mode (if set) */
241 #define CEU_CEIER_MASK (CEU_CEIER_CPEIE | CEU_CEIER_VBP)
245 * return value doesn't reflex the success/failure to queue the new buffer,
246 * but rather the status of the previous buffer.
248 static int sh_mobile_ceu_capture(struct sh_mobile_ceu_dev
*pcdev
)
250 struct soc_camera_device
*icd
= pcdev
->icd
;
251 dma_addr_t phys_addr_top
, phys_addr_bottom
;
256 * The hardware is _very_ picky about this sequence. Especially
257 * the CEU_CETCR_MAGIC value. It seems like we need to acknowledge
258 * several not-so-well documented interrupt sources in CETCR.
260 ceu_write(pcdev
, CEIER
, ceu_read(pcdev
, CEIER
) & ~CEU_CEIER_MASK
);
261 status
= ceu_read(pcdev
, CETCR
);
262 ceu_write(pcdev
, CETCR
, ~status
& CEU_CETCR_MAGIC
);
263 ceu_write(pcdev
, CEIER
, ceu_read(pcdev
, CEIER
) | CEU_CEIER_MASK
);
264 ceu_write(pcdev
, CAPCR
, ceu_read(pcdev
, CAPCR
) & ~CEU_CAPCR_CTNCP
);
265 ceu_write(pcdev
, CETCR
, CEU_CETCR_MAGIC
^ CEU_CETCR_IGRW
);
268 * When a VBP interrupt occurs, a capture end interrupt does not occur
269 * and the image of that frame is not captured correctly. So, soft reset
272 if (status
& CEU_CEIER_VBP
) {
273 sh_mobile_ceu_soft_reset(pcdev
);
280 phys_addr_top
= videobuf_to_dma_contig(pcdev
->active
);
281 ceu_write(pcdev
, CDAYR
, phys_addr_top
);
282 if (pcdev
->is_interlaced
) {
283 phys_addr_bottom
= phys_addr_top
+ icd
->user_width
;
284 ceu_write(pcdev
, CDBYR
, phys_addr_bottom
);
287 switch (icd
->current_fmt
->fourcc
) {
288 case V4L2_PIX_FMT_NV12
:
289 case V4L2_PIX_FMT_NV21
:
290 case V4L2_PIX_FMT_NV16
:
291 case V4L2_PIX_FMT_NV61
:
292 phys_addr_top
+= icd
->user_width
*
294 ceu_write(pcdev
, CDACR
, phys_addr_top
);
295 if (pcdev
->is_interlaced
) {
296 phys_addr_bottom
= phys_addr_top
+
298 ceu_write(pcdev
, CDBCR
, phys_addr_bottom
);
302 pcdev
->active
->state
= VIDEOBUF_ACTIVE
;
303 ceu_write(pcdev
, CAPSR
, 0x1); /* start capture */
308 static int sh_mobile_ceu_videobuf_prepare(struct videobuf_queue
*vq
,
309 struct videobuf_buffer
*vb
,
310 enum v4l2_field field
)
312 struct soc_camera_device
*icd
= vq
->priv_data
;
313 struct sh_mobile_ceu_buffer
*buf
;
316 buf
= container_of(vb
, struct sh_mobile_ceu_buffer
, vb
);
318 dev_dbg(icd
->dev
.parent
, "%s (vb=0x%p) 0x%08lx %zd\n", __func__
,
319 vb
, vb
->baddr
, vb
->bsize
);
321 /* Added list head initialization on alloc */
322 WARN_ON(!list_empty(&vb
->queue
));
326 * This can be useful if you want to see if we actually fill
327 * the buffer with something
329 memset((void *)vb
->baddr
, 0xaa, vb
->bsize
);
332 BUG_ON(NULL
== icd
->current_fmt
);
334 if (buf
->fmt
!= icd
->current_fmt
||
335 vb
->width
!= icd
->user_width
||
336 vb
->height
!= icd
->user_height
||
337 vb
->field
!= field
) {
338 buf
->fmt
= icd
->current_fmt
;
339 vb
->width
= icd
->user_width
;
340 vb
->height
= icd
->user_height
;
342 vb
->state
= VIDEOBUF_NEEDS_INIT
;
345 vb
->size
= vb
->width
* vb
->height
* ((buf
->fmt
->depth
+ 7) >> 3);
346 if (0 != vb
->baddr
&& vb
->bsize
< vb
->size
) {
351 if (vb
->state
== VIDEOBUF_NEEDS_INIT
) {
352 ret
= videobuf_iolock(vq
, vb
, NULL
);
355 vb
->state
= VIDEOBUF_PREPARED
;
360 free_buffer(vq
, buf
);
365 /* Called under spinlock_irqsave(&pcdev->lock, ...) */
366 static void sh_mobile_ceu_videobuf_queue(struct videobuf_queue
*vq
,
367 struct videobuf_buffer
*vb
)
369 struct soc_camera_device
*icd
= vq
->priv_data
;
370 struct soc_camera_host
*ici
= to_soc_camera_host(icd
->dev
.parent
);
371 struct sh_mobile_ceu_dev
*pcdev
= ici
->priv
;
373 dev_dbg(icd
->dev
.parent
, "%s (vb=0x%p) 0x%08lx %zd\n", __func__
,
374 vb
, vb
->baddr
, vb
->bsize
);
376 vb
->state
= VIDEOBUF_QUEUED
;
377 list_add_tail(&vb
->queue
, &pcdev
->capture
);
379 if (!pcdev
->active
) {
381 * Because there were no active buffer at this moment,
382 * we are not interested in the return value of
383 * sh_mobile_ceu_capture here.
386 sh_mobile_ceu_capture(pcdev
);
390 static void sh_mobile_ceu_videobuf_release(struct videobuf_queue
*vq
,
391 struct videobuf_buffer
*vb
)
393 struct soc_camera_device
*icd
= vq
->priv_data
;
394 struct soc_camera_host
*ici
= to_soc_camera_host(icd
->dev
.parent
);
395 struct sh_mobile_ceu_dev
*pcdev
= ici
->priv
;
398 spin_lock_irqsave(&pcdev
->lock
, flags
);
400 if (pcdev
->active
== vb
) {
401 /* disable capture (release DMA buffer), reset */
402 ceu_write(pcdev
, CAPSR
, 1 << 16);
403 pcdev
->active
= NULL
;
406 if ((vb
->state
== VIDEOBUF_ACTIVE
|| vb
->state
== VIDEOBUF_QUEUED
) &&
407 !list_empty(&vb
->queue
)) {
408 vb
->state
= VIDEOBUF_ERROR
;
409 list_del_init(&vb
->queue
);
412 spin_unlock_irqrestore(&pcdev
->lock
, flags
);
414 free_buffer(vq
, container_of(vb
, struct sh_mobile_ceu_buffer
, vb
));
417 static struct videobuf_queue_ops sh_mobile_ceu_videobuf_ops
= {
418 .buf_setup
= sh_mobile_ceu_videobuf_setup
,
419 .buf_prepare
= sh_mobile_ceu_videobuf_prepare
,
420 .buf_queue
= sh_mobile_ceu_videobuf_queue
,
421 .buf_release
= sh_mobile_ceu_videobuf_release
,
424 static irqreturn_t
sh_mobile_ceu_irq(int irq
, void *data
)
426 struct sh_mobile_ceu_dev
*pcdev
= data
;
427 struct videobuf_buffer
*vb
;
430 spin_lock_irqsave(&pcdev
->lock
, flags
);
434 /* Stale interrupt from a released buffer */
437 list_del_init(&vb
->queue
);
439 if (!list_empty(&pcdev
->capture
))
440 pcdev
->active
= list_entry(pcdev
->capture
.next
,
441 struct videobuf_buffer
, queue
);
443 pcdev
->active
= NULL
;
445 vb
->state
= (sh_mobile_ceu_capture(pcdev
) < 0) ?
446 VIDEOBUF_ERROR
: VIDEOBUF_DONE
;
447 do_gettimeofday(&vb
->ts
);
452 spin_unlock_irqrestore(&pcdev
->lock
, flags
);
457 /* Called with .video_lock held */
458 static int sh_mobile_ceu_add_device(struct soc_camera_device
*icd
)
460 struct soc_camera_host
*ici
= to_soc_camera_host(icd
->dev
.parent
);
461 struct sh_mobile_ceu_dev
*pcdev
= ici
->priv
;
467 dev_info(icd
->dev
.parent
,
468 "SuperH Mobile CEU driver attached to camera %d\n",
471 pm_runtime_get_sync(ici
->v4l2_dev
.dev
);
473 ret
= sh_mobile_ceu_soft_reset(pcdev
);
480 /* Called with .video_lock held */
481 static void sh_mobile_ceu_remove_device(struct soc_camera_device
*icd
)
483 struct soc_camera_host
*ici
= to_soc_camera_host(icd
->dev
.parent
);
484 struct sh_mobile_ceu_dev
*pcdev
= ici
->priv
;
487 BUG_ON(icd
!= pcdev
->icd
);
489 /* disable capture, disable interrupts */
490 ceu_write(pcdev
, CEIER
, 0);
491 sh_mobile_ceu_soft_reset(pcdev
);
493 /* make sure active buffer is canceled */
494 spin_lock_irqsave(&pcdev
->lock
, flags
);
496 list_del(&pcdev
->active
->queue
);
497 pcdev
->active
->state
= VIDEOBUF_ERROR
;
498 wake_up_all(&pcdev
->active
->done
);
499 pcdev
->active
= NULL
;
501 spin_unlock_irqrestore(&pcdev
->lock
, flags
);
503 pm_runtime_put_sync(ici
->v4l2_dev
.dev
);
505 dev_info(icd
->dev
.parent
,
506 "SuperH Mobile CEU driver detached from camera %d\n",
513 * See chapter 29.4.12 "Capture Filter Control Register (CFLCR)"
514 * in SH7722 Hardware Manual
516 static unsigned int size_dst(unsigned int src
, unsigned int scale
)
518 unsigned int mant_pre
= scale
>> 12;
521 return ((mant_pre
+ 2 * (src
- 1)) / (2 * mant_pre
) - 1) *
522 mant_pre
* 4096 / scale
+ 1;
525 static u16
calc_scale(unsigned int src
, unsigned int *dst
)
532 scale
= (src
* 4096 / *dst
) & ~7;
534 while (scale
> 4096 && size_dst(src
, scale
) < *dst
)
537 *dst
= size_dst(src
, scale
);
542 /* rect is guaranteed to not exceed the scaled camera rectangle */
543 static void sh_mobile_ceu_set_rect(struct soc_camera_device
*icd
,
544 unsigned int out_width
,
545 unsigned int out_height
)
547 struct soc_camera_host
*ici
= to_soc_camera_host(icd
->dev
.parent
);
548 struct sh_mobile_ceu_cam
*cam
= icd
->host_priv
;
549 struct v4l2_rect
*rect
= &cam
->ceu_rect
;
550 struct sh_mobile_ceu_dev
*pcdev
= ici
->priv
;
551 unsigned int height
, width
, cdwdr_width
, in_width
, in_height
;
552 unsigned int left_offset
, top_offset
;
555 dev_dbg(icd
->dev
.parent
, "Crop %ux%u@%u:%u\n",
556 rect
->width
, rect
->height
, rect
->left
, rect
->top
);
558 left_offset
= rect
->left
;
559 top_offset
= rect
->top
;
561 if (pcdev
->image_mode
) {
562 in_width
= rect
->width
;
563 if (!pcdev
->is_16bit
) {
567 width
= cdwdr_width
= out_width
;
569 unsigned int w_factor
= (icd
->current_fmt
->depth
+ 7) >> 3;
571 width
= out_width
* w_factor
/ 2;
573 if (!pcdev
->is_16bit
)
576 in_width
= rect
->width
* w_factor
/ 2;
577 left_offset
= left_offset
* w_factor
/ 2;
579 cdwdr_width
= width
* 2;
583 in_height
= rect
->height
;
584 if (pcdev
->is_interlaced
) {
591 /* Set CAMOR, CAPWR, CFSZR, take care of CDWDR */
592 camor
= left_offset
| (top_offset
<< 16);
594 dev_geo(icd
->dev
.parent
,
595 "CAMOR 0x%x, CAPWR 0x%x, CFSZR 0x%x, CDWDR 0x%x\n", camor
,
596 (in_height
<< 16) | in_width
, (height
<< 16) | width
,
599 ceu_write(pcdev
, CAMOR
, camor
);
600 ceu_write(pcdev
, CAPWR
, (in_height
<< 16) | in_width
);
601 ceu_write(pcdev
, CFSZR
, (height
<< 16) | width
);
602 ceu_write(pcdev
, CDWDR
, cdwdr_width
);
605 static u32
capture_save_reset(struct sh_mobile_ceu_dev
*pcdev
)
607 u32 capsr
= ceu_read(pcdev
, CAPSR
);
608 ceu_write(pcdev
, CAPSR
, 1 << 16); /* reset, stop capture */
612 static void capture_restore(struct sh_mobile_ceu_dev
*pcdev
, u32 capsr
)
614 unsigned long timeout
= jiffies
+ 10 * HZ
;
617 * Wait until the end of the current frame. It can take a long time,
618 * but if it has been aborted by a CAPSR reset, it shoule exit sooner.
620 while ((ceu_read(pcdev
, CSTSR
) & 1) && time_before(jiffies
, timeout
))
623 if (time_after(jiffies
, timeout
)) {
624 dev_err(pcdev
->ici
.v4l2_dev
.dev
,
625 "Timeout waiting for frame end! Interface problem?\n");
629 /* Wait until reset clears, this shall not hang... */
630 while (ceu_read(pcdev
, CAPSR
) & (1 << 16))
633 /* Anything to restore? */
634 if (capsr
& ~(1 << 16))
635 ceu_write(pcdev
, CAPSR
, capsr
);
638 static int sh_mobile_ceu_set_bus_param(struct soc_camera_device
*icd
,
641 struct soc_camera_host
*ici
= to_soc_camera_host(icd
->dev
.parent
);
642 struct sh_mobile_ceu_dev
*pcdev
= ici
->priv
;
644 unsigned long camera_flags
, common_flags
, value
;
646 struct sh_mobile_ceu_cam
*cam
= icd
->host_priv
;
647 u32 capsr
= capture_save_reset(pcdev
);
649 camera_flags
= icd
->ops
->query_bus_param(icd
);
650 common_flags
= soc_camera_bus_param_compatible(camera_flags
,
651 make_bus_param(pcdev
));
655 ret
= icd
->ops
->set_bus_param(icd
, common_flags
);
659 switch (common_flags
& SOCAM_DATAWIDTH_MASK
) {
660 case SOCAM_DATAWIDTH_8
:
663 case SOCAM_DATAWIDTH_16
:
670 ceu_write(pcdev
, CRCNTR
, 0);
671 ceu_write(pcdev
, CRCMPR
, 0);
673 value
= 0x00000010; /* data fetch by default */
676 switch (icd
->current_fmt
->fourcc
) {
677 case V4L2_PIX_FMT_NV12
:
678 case V4L2_PIX_FMT_NV21
:
679 yuv_lineskip
= 1; /* skip for NV12/21, no skip for NV16/61 */
681 case V4L2_PIX_FMT_NV16
:
682 case V4L2_PIX_FMT_NV61
:
683 switch (cam
->camera_fmt
->fourcc
) {
684 case V4L2_PIX_FMT_UYVY
:
685 value
= 0x00000000; /* Cb0, Y0, Cr0, Y1 */
687 case V4L2_PIX_FMT_VYUY
:
688 value
= 0x00000100; /* Cr0, Y0, Cb0, Y1 */
690 case V4L2_PIX_FMT_YUYV
:
691 value
= 0x00000200; /* Y0, Cb0, Y1, Cr0 */
693 case V4L2_PIX_FMT_YVYU
:
694 value
= 0x00000300; /* Y0, Cr0, Y1, Cb0 */
701 if (icd
->current_fmt
->fourcc
== V4L2_PIX_FMT_NV21
||
702 icd
->current_fmt
->fourcc
== V4L2_PIX_FMT_NV61
)
703 value
^= 0x00000100; /* swap U, V to change from NV1x->NVx1 */
705 value
|= common_flags
& SOCAM_VSYNC_ACTIVE_LOW
? 1 << 1 : 0;
706 value
|= common_flags
& SOCAM_HSYNC_ACTIVE_LOW
? 1 << 0 : 0;
707 value
|= pcdev
->is_16bit
? 1 << 12 : 0;
708 ceu_write(pcdev
, CAMCR
, value
);
710 ceu_write(pcdev
, CAPCR
, 0x00300000);
711 ceu_write(pcdev
, CAIFR
, pcdev
->is_interlaced
? 0x101 : 0);
713 sh_mobile_ceu_set_rect(icd
, icd
->user_width
, icd
->user_height
);
716 ceu_write(pcdev
, CFLCR
, pcdev
->cflcr
);
719 * A few words about byte order (observed in Big Endian mode)
721 * In data fetch mode bytes are received in chunks of 8 bytes.
722 * D0, D1, D2, D3, D4, D5, D6, D7 (D0 received first)
724 * The data is however by default written to memory in reverse order:
725 * D7, D6, D5, D4, D3, D2, D1, D0 (D7 written to lowest byte)
727 * The lowest three bits of CDOCR allows us to do swapping,
728 * using 7 we swap the data bytes to match the incoming order:
729 * D0, D1, D2, D3, D4, D5, D6, D7
733 value
&= ~0x00000010; /* convert 4:2:2 -> 4:2:0 */
735 ceu_write(pcdev
, CDOCR
, value
);
736 ceu_write(pcdev
, CFWCR
, 0); /* keep "datafetch firewall" disabled */
738 dev_dbg(icd
->dev
.parent
, "S_FMT successful for %c%c%c%c %ux%u\n",
739 pixfmt
& 0xff, (pixfmt
>> 8) & 0xff,
740 (pixfmt
>> 16) & 0xff, (pixfmt
>> 24) & 0xff,
741 icd
->user_width
, icd
->user_height
);
743 capture_restore(pcdev
, capsr
);
745 /* not in bundle mode: skip CBDSR, CDAYR2, CDACR2, CDBYR2, CDBCR2 */
749 static int sh_mobile_ceu_try_bus_param(struct soc_camera_device
*icd
)
751 struct soc_camera_host
*ici
= to_soc_camera_host(icd
->dev
.parent
);
752 struct sh_mobile_ceu_dev
*pcdev
= ici
->priv
;
753 unsigned long camera_flags
, common_flags
;
755 camera_flags
= icd
->ops
->query_bus_param(icd
);
756 common_flags
= soc_camera_bus_param_compatible(camera_flags
,
757 make_bus_param(pcdev
));
764 static const struct soc_camera_data_format sh_mobile_ceu_formats
[] = {
768 .fourcc
= V4L2_PIX_FMT_NV12
,
769 .colorspace
= V4L2_COLORSPACE_JPEG
,
774 .fourcc
= V4L2_PIX_FMT_NV21
,
775 .colorspace
= V4L2_COLORSPACE_JPEG
,
780 .fourcc
= V4L2_PIX_FMT_NV16
,
781 .colorspace
= V4L2_COLORSPACE_JPEG
,
786 .fourcc
= V4L2_PIX_FMT_NV61
,
787 .colorspace
= V4L2_COLORSPACE_JPEG
,
791 static int sh_mobile_ceu_get_formats(struct soc_camera_device
*icd
, int idx
,
792 struct soc_camera_format_xlate
*xlate
)
794 struct device
*dev
= icd
->dev
.parent
;
797 struct sh_mobile_ceu_cam
*cam
;
799 ret
= sh_mobile_ceu_try_bus_param(icd
);
803 if (!icd
->host_priv
) {
804 cam
= kzalloc(sizeof(*cam
), GFP_KERNEL
);
808 icd
->host_priv
= cam
;
810 cam
= icd
->host_priv
;
813 /* Beginning of a pass */
815 cam
->extra_fmt
= NULL
;
817 switch (icd
->formats
[idx
].fourcc
) {
818 case V4L2_PIX_FMT_UYVY
:
819 case V4L2_PIX_FMT_VYUY
:
820 case V4L2_PIX_FMT_YUYV
:
821 case V4L2_PIX_FMT_YVYU
:
823 goto add_single_format
;
826 * Our case is simple so far: for any of the above four camera
827 * formats we add all our four synthesized NV* formats, so,
828 * just marking the device with a single flag suffices. If
829 * the format generation rules are more complex, you would have
830 * to actually hang your already added / counted formats onto
831 * the host_priv pointer and check whether the format you're
832 * going to add now is already there.
834 cam
->extra_fmt
= (void *)sh_mobile_ceu_formats
;
836 n
= ARRAY_SIZE(sh_mobile_ceu_formats
);
838 for (k
= 0; xlate
&& k
< n
; k
++) {
839 xlate
->host_fmt
= &sh_mobile_ceu_formats
[k
];
840 xlate
->cam_fmt
= icd
->formats
+ idx
;
841 xlate
->buswidth
= icd
->formats
[idx
].depth
;
843 dev_dbg(dev
, "Providing format %s using %s\n",
844 sh_mobile_ceu_formats
[k
].name
,
845 icd
->formats
[idx
].name
);
849 /* Generic pass-through */
852 xlate
->host_fmt
= icd
->formats
+ idx
;
853 xlate
->cam_fmt
= icd
->formats
+ idx
;
854 xlate
->buswidth
= icd
->formats
[idx
].depth
;
857 "Providing format %s in pass-through mode\n",
858 icd
->formats
[idx
].name
);
865 static void sh_mobile_ceu_put_formats(struct soc_camera_device
*icd
)
867 kfree(icd
->host_priv
);
868 icd
->host_priv
= NULL
;
871 /* Check if any dimension of r1 is smaller than respective one of r2 */
872 static bool is_smaller(struct v4l2_rect
*r1
, struct v4l2_rect
*r2
)
874 return r1
->width
< r2
->width
|| r1
->height
< r2
->height
;
877 /* Check if r1 fails to cover r2 */
878 static bool is_inside(struct v4l2_rect
*r1
, struct v4l2_rect
*r2
)
880 return r1
->left
> r2
->left
|| r1
->top
> r2
->top
||
881 r1
->left
+ r1
->width
< r2
->left
+ r2
->width
||
882 r1
->top
+ r1
->height
< r2
->top
+ r2
->height
;
885 static unsigned int scale_down(unsigned int size
, unsigned int scale
)
887 return (size
* 4096 + scale
/ 2) / scale
;
890 static unsigned int scale_up(unsigned int size
, unsigned int scale
)
892 return (size
* scale
+ 2048) / 4096;
895 static unsigned int calc_generic_scale(unsigned int input
, unsigned int output
)
897 return (input
* 4096 + output
/ 2) / output
;
900 static int client_g_rect(struct v4l2_subdev
*sd
, struct v4l2_rect
*rect
)
902 struct v4l2_crop crop
;
903 struct v4l2_cropcap cap
;
906 crop
.type
= V4L2_BUF_TYPE_VIDEO_CAPTURE
;
908 ret
= v4l2_subdev_call(sd
, video
, g_crop
, &crop
);
914 /* Camera driver doesn't support .g_crop(), assume default rectangle */
915 cap
.type
= V4L2_BUF_TYPE_VIDEO_CAPTURE
;
917 ret
= v4l2_subdev_call(sd
, video
, cropcap
, &cap
);
927 * The common for both scaling and cropping iterative approach is:
928 * 1. try if the client can produce exactly what requested by the user
929 * 2. if (1) failed, try to double the client image until we get one big enough
930 * 3. if (2) failed, try to request the maximum image
932 static int client_s_crop(struct v4l2_subdev
*sd
, struct v4l2_crop
*crop
,
933 struct v4l2_crop
*cam_crop
)
935 struct v4l2_rect
*rect
= &crop
->c
, *cam_rect
= &cam_crop
->c
;
936 struct device
*dev
= sd
->v4l2_dev
->dev
;
937 struct v4l2_cropcap cap
;
939 unsigned int width
, height
;
941 v4l2_subdev_call(sd
, video
, s_crop
, crop
);
942 ret
= client_g_rect(sd
, cam_rect
);
947 * Now cam_crop contains the current camera input rectangle, and it must
948 * be within camera cropcap bounds
950 if (!memcmp(rect
, cam_rect
, sizeof(*rect
))) {
951 /* Even if camera S_CROP failed, but camera rectangle matches */
952 dev_dbg(dev
, "Camera S_CROP successful for %ux%u@%u:%u\n",
953 rect
->width
, rect
->height
, rect
->left
, rect
->top
);
957 /* Try to fix cropping, that camera hasn't managed to set */
958 dev_geo(dev
, "Fix camera S_CROP for %ux%u@%u:%u to %ux%u@%u:%u\n",
959 cam_rect
->width
, cam_rect
->height
,
960 cam_rect
->left
, cam_rect
->top
,
961 rect
->width
, rect
->height
, rect
->left
, rect
->top
);
963 /* We need sensor maximum rectangle */
964 ret
= v4l2_subdev_call(sd
, video
, cropcap
, &cap
);
968 soc_camera_limit_side(&rect
->left
, &rect
->width
, cap
.bounds
.left
, 2,
970 soc_camera_limit_side(&rect
->top
, &rect
->height
, cap
.bounds
.top
, 4,
974 * Popular special case - some cameras can only handle fixed sizes like
975 * QVGA, VGA,... Take care to avoid infinite loop.
977 width
= max(cam_rect
->width
, 2);
978 height
= max(cam_rect
->height
, 2);
980 while (!ret
&& (is_smaller(cam_rect
, rect
) ||
981 is_inside(cam_rect
, rect
)) &&
982 (cap
.bounds
.width
> width
|| cap
.bounds
.height
> height
)) {
987 cam_rect
->width
= width
;
988 cam_rect
->height
= height
;
991 * We do not know what capabilities the camera has to set up
992 * left and top borders. We could try to be smarter in iterating
993 * them, e.g., if camera current left is to the right of the
994 * target left, set it to the middle point between the current
995 * left and minimum left. But that would add too much
996 * complexity: we would have to iterate each border separately.
998 if (cam_rect
->left
> rect
->left
)
999 cam_rect
->left
= cap
.bounds
.left
;
1001 if (cam_rect
->left
+ cam_rect
->width
< rect
->left
+ rect
->width
)
1002 cam_rect
->width
= rect
->left
+ rect
->width
-
1005 if (cam_rect
->top
> rect
->top
)
1006 cam_rect
->top
= cap
.bounds
.top
;
1008 if (cam_rect
->top
+ cam_rect
->height
< rect
->top
+ rect
->height
)
1009 cam_rect
->height
= rect
->top
+ rect
->height
-
1012 v4l2_subdev_call(sd
, video
, s_crop
, cam_crop
);
1013 ret
= client_g_rect(sd
, cam_rect
);
1014 dev_geo(dev
, "Camera S_CROP %d for %ux%u@%u:%u\n", ret
,
1015 cam_rect
->width
, cam_rect
->height
,
1016 cam_rect
->left
, cam_rect
->top
);
1019 /* S_CROP must not modify the rectangle */
1020 if (is_smaller(cam_rect
, rect
) || is_inside(cam_rect
, rect
)) {
1022 * The camera failed to configure a suitable cropping,
1023 * we cannot use the current rectangle, set to max
1025 *cam_rect
= cap
.bounds
;
1026 v4l2_subdev_call(sd
, video
, s_crop
, cam_crop
);
1027 ret
= client_g_rect(sd
, cam_rect
);
1028 dev_geo(dev
, "Camera S_CROP %d for max %ux%u@%u:%u\n", ret
,
1029 cam_rect
->width
, cam_rect
->height
,
1030 cam_rect
->left
, cam_rect
->top
);
1036 static int get_camera_scales(struct v4l2_subdev
*sd
, struct v4l2_rect
*rect
,
1037 unsigned int *scale_h
, unsigned int *scale_v
)
1039 struct v4l2_format f
;
1042 f
.type
= V4L2_BUF_TYPE_VIDEO_CAPTURE
;
1044 ret
= v4l2_subdev_call(sd
, video
, g_fmt
, &f
);
1048 *scale_h
= calc_generic_scale(rect
->width
, f
.fmt
.pix
.width
);
1049 *scale_v
= calc_generic_scale(rect
->height
, f
.fmt
.pix
.height
);
1054 static int get_camera_subwin(struct soc_camera_device
*icd
,
1055 struct v4l2_rect
*cam_subrect
,
1056 unsigned int cam_hscale
, unsigned int cam_vscale
)
1058 struct sh_mobile_ceu_cam
*cam
= icd
->host_priv
;
1059 struct v4l2_rect
*ceu_rect
= &cam
->ceu_rect
;
1061 if (!ceu_rect
->width
) {
1062 struct v4l2_subdev
*sd
= soc_camera_to_subdev(icd
);
1063 struct device
*dev
= icd
->dev
.parent
;
1064 struct v4l2_format f
;
1065 struct v4l2_pix_format
*pix
= &f
.fmt
.pix
;
1069 f
.type
= V4L2_BUF_TYPE_VIDEO_CAPTURE
;
1071 ret
= v4l2_subdev_call(sd
, video
, g_fmt
, &f
);
1075 dev_geo(dev
, "camera fmt %ux%u\n", pix
->width
, pix
->height
);
1077 if (pix
->width
> 2560) {
1078 ceu_rect
->width
= 2560;
1079 ceu_rect
->left
= (pix
->width
- 2560) / 2;
1081 ceu_rect
->width
= pix
->width
;
1085 if (pix
->height
> 1920) {
1086 ceu_rect
->height
= 1920;
1087 ceu_rect
->top
= (pix
->height
- 1920) / 2;
1089 ceu_rect
->height
= pix
->height
;
1093 dev_geo(dev
, "initialised CEU rect %ux%u@%u:%u\n",
1094 ceu_rect
->width
, ceu_rect
->height
,
1095 ceu_rect
->left
, ceu_rect
->top
);
1098 cam_subrect
->width
= scale_up(ceu_rect
->width
, cam_hscale
);
1099 cam_subrect
->left
= scale_up(ceu_rect
->left
, cam_hscale
);
1100 cam_subrect
->height
= scale_up(ceu_rect
->height
, cam_vscale
);
1101 cam_subrect
->top
= scale_up(ceu_rect
->top
, cam_vscale
);
1106 static int client_s_fmt(struct soc_camera_device
*icd
, struct v4l2_format
*f
,
1109 struct v4l2_subdev
*sd
= soc_camera_to_subdev(icd
);
1110 struct device
*dev
= icd
->dev
.parent
;
1111 struct v4l2_pix_format
*pix
= &f
->fmt
.pix
;
1112 unsigned int width
= pix
->width
, height
= pix
->height
, tmp_w
, tmp_h
;
1113 unsigned int max_width
, max_height
;
1114 struct v4l2_cropcap cap
;
1117 cap
.type
= V4L2_BUF_TYPE_VIDEO_CAPTURE
;
1119 ret
= v4l2_subdev_call(sd
, video
, cropcap
, &cap
);
1123 max_width
= min(cap
.bounds
.width
, 2560);
1124 max_height
= min(cap
.bounds
.height
, 1920);
1126 ret
= v4l2_subdev_call(sd
, video
, s_fmt
, f
);
1130 dev_geo(dev
, "camera scaled to %ux%u\n", pix
->width
, pix
->height
);
1132 if ((width
== pix
->width
&& height
== pix
->height
) || !ceu_can_scale
)
1135 /* Camera set a format, but geometry is not precise, try to improve */
1137 tmp_h
= pix
->height
;
1139 /* width <= max_width && height <= max_height - guaranteed by try_fmt */
1140 while ((width
> tmp_w
|| height
> tmp_h
) &&
1141 tmp_w
< max_width
&& tmp_h
< max_height
) {
1142 tmp_w
= min(2 * tmp_w
, max_width
);
1143 tmp_h
= min(2 * tmp_h
, max_height
);
1145 pix
->height
= tmp_h
;
1146 ret
= v4l2_subdev_call(sd
, video
, s_fmt
, f
);
1147 dev_geo(dev
, "Camera scaled to %ux%u\n",
1148 pix
->width
, pix
->height
);
1150 /* This shouldn't happen */
1151 dev_err(dev
, "Client failed to set format: %d\n", ret
);
1160 * @rect - camera cropped rectangle
1161 * @sub_rect - CEU cropped rectangle, mapped back to camera input area
1162 * @ceu_rect - on output calculated CEU crop rectangle
1164 static int client_scale(struct soc_camera_device
*icd
, struct v4l2_rect
*rect
,
1165 struct v4l2_rect
*sub_rect
, struct v4l2_rect
*ceu_rect
,
1166 struct v4l2_format
*f
, bool ceu_can_scale
)
1168 struct v4l2_subdev
*sd
= soc_camera_to_subdev(icd
);
1169 struct sh_mobile_ceu_cam
*cam
= icd
->host_priv
;
1170 struct device
*dev
= icd
->dev
.parent
;
1171 struct v4l2_format f_tmp
= *f
;
1172 struct v4l2_pix_format
*pix_tmp
= &f_tmp
.fmt
.pix
;
1173 unsigned int scale_h
, scale_v
;
1176 /* 5. Apply iterative camera S_FMT for camera user window. */
1177 ret
= client_s_fmt(icd
, &f_tmp
, ceu_can_scale
);
1181 dev_geo(dev
, "5: camera scaled to %ux%u\n",
1182 pix_tmp
->width
, pix_tmp
->height
);
1184 /* 6. Retrieve camera output window (g_fmt) */
1186 /* unneeded - it is already in "f_tmp" */
1188 /* 7. Calculate new camera scales. */
1189 ret
= get_camera_scales(sd
, rect
, &scale_h
, &scale_v
);
1193 dev_geo(dev
, "7: camera scales %u:%u\n", scale_h
, scale_v
);
1195 cam
->cam_width
= pix_tmp
->width
;
1196 cam
->cam_height
= pix_tmp
->height
;
1197 f
->fmt
.pix
.width
= pix_tmp
->width
;
1198 f
->fmt
.pix
.height
= pix_tmp
->height
;
1201 * 8. Calculate new CEU crop - apply camera scales to previously
1202 * calculated "effective" crop.
1204 ceu_rect
->left
= scale_down(sub_rect
->left
, scale_h
);
1205 ceu_rect
->width
= scale_down(sub_rect
->width
, scale_h
);
1206 ceu_rect
->top
= scale_down(sub_rect
->top
, scale_v
);
1207 ceu_rect
->height
= scale_down(sub_rect
->height
, scale_v
);
1209 dev_geo(dev
, "8: new CEU rect %ux%u@%u:%u\n",
1210 ceu_rect
->width
, ceu_rect
->height
,
1211 ceu_rect
->left
, ceu_rect
->top
);
1216 /* Get combined scales */
1217 static int get_scales(struct soc_camera_device
*icd
,
1218 unsigned int *scale_h
, unsigned int *scale_v
)
1220 struct sh_mobile_ceu_cam
*cam
= icd
->host_priv
;
1221 struct v4l2_subdev
*sd
= soc_camera_to_subdev(icd
);
1222 struct v4l2_crop cam_crop
;
1223 unsigned int width_in
, height_in
;
1226 cam_crop
.type
= V4L2_BUF_TYPE_VIDEO_CAPTURE
;
1228 ret
= client_g_rect(sd
, &cam_crop
.c
);
1232 ret
= get_camera_scales(sd
, &cam_crop
.c
, scale_h
, scale_v
);
1236 width_in
= scale_up(cam
->ceu_rect
.width
, *scale_h
);
1237 height_in
= scale_up(cam
->ceu_rect
.height
, *scale_v
);
1239 *scale_h
= calc_generic_scale(width_in
, icd
->user_width
);
1240 *scale_v
= calc_generic_scale(height_in
, icd
->user_height
);
1246 * CEU can scale and crop, but we don't want to waste bandwidth and kill the
1247 * framerate by always requesting the maximum image from the client. See
1248 * Documentation/video4linux/sh_mobile_camera_ceu.txt for a description of
1249 * scaling and cropping algorithms and for the meaning of referenced here steps.
1251 static int sh_mobile_ceu_set_crop(struct soc_camera_device
*icd
,
1252 struct v4l2_crop
*a
)
1254 struct v4l2_rect
*rect
= &a
->c
;
1255 struct soc_camera_host
*ici
= to_soc_camera_host(icd
->dev
.parent
);
1256 struct sh_mobile_ceu_dev
*pcdev
= ici
->priv
;
1257 struct v4l2_crop cam_crop
;
1258 struct sh_mobile_ceu_cam
*cam
= icd
->host_priv
;
1259 struct v4l2_rect
*cam_rect
= &cam_crop
.c
, *ceu_rect
= &cam
->ceu_rect
;
1260 struct v4l2_subdev
*sd
= soc_camera_to_subdev(icd
);
1261 struct device
*dev
= icd
->dev
.parent
;
1262 struct v4l2_format f
;
1263 struct v4l2_pix_format
*pix
= &f
.fmt
.pix
;
1264 unsigned int scale_comb_h
, scale_comb_v
, scale_ceu_h
, scale_ceu_v
,
1265 out_width
, out_height
;
1269 /* 1. Calculate current combined scales. */
1270 ret
= get_scales(icd
, &scale_comb_h
, &scale_comb_v
);
1274 dev_geo(dev
, "1: combined scales %u:%u\n", scale_comb_h
, scale_comb_v
);
1276 /* 2. Apply iterative camera S_CROP for new input window. */
1277 ret
= client_s_crop(sd
, a
, &cam_crop
);
1281 dev_geo(dev
, "2: camera cropped to %ux%u@%u:%u\n",
1282 cam_rect
->width
, cam_rect
->height
,
1283 cam_rect
->left
, cam_rect
->top
);
1285 /* On success cam_crop contains current camera crop */
1288 * 3. If old combined scales applied to new crop produce an impossible
1289 * user window, adjust scales to produce nearest possible window.
1291 out_width
= scale_down(rect
->width
, scale_comb_h
);
1292 out_height
= scale_down(rect
->height
, scale_comb_v
);
1294 if (out_width
> 2560)
1296 else if (out_width
< 2)
1299 if (out_height
> 1920)
1301 else if (out_height
< 4)
1304 dev_geo(dev
, "3: Adjusted output %ux%u\n", out_width
, out_height
);
1306 /* 4. Use G_CROP to retrieve actual input window: already in cam_crop */
1309 * 5. Using actual input window and calculated combined scales calculate
1310 * camera target output window.
1312 pix
->width
= scale_down(cam_rect
->width
, scale_comb_h
);
1313 pix
->height
= scale_down(cam_rect
->height
, scale_comb_v
);
1315 dev_geo(dev
, "5: camera target %ux%u\n", pix
->width
, pix
->height
);
1318 pix
->pixelformat
= cam
->camera_fmt
->fourcc
;
1319 pix
->colorspace
= cam
->camera_fmt
->colorspace
;
1321 capsr
= capture_save_reset(pcdev
);
1322 dev_dbg(dev
, "CAPSR 0x%x, CFLCR 0x%x\n", capsr
, pcdev
->cflcr
);
1324 /* Make relative to camera rectangle */
1325 rect
->left
-= cam_rect
->left
;
1326 rect
->top
-= cam_rect
->top
;
1328 f
.type
= V4L2_BUF_TYPE_VIDEO_CAPTURE
;
1330 ret
= client_scale(icd
, cam_rect
, rect
, ceu_rect
, &f
,
1331 pcdev
->image_mode
&& !pcdev
->is_interlaced
);
1333 dev_geo(dev
, "6-9: %d\n", ret
);
1335 /* 10. Use CEU cropping to crop to the new window. */
1336 sh_mobile_ceu_set_rect(icd
, out_width
, out_height
);
1338 dev_geo(dev
, "10: CEU cropped to %ux%u@%u:%u\n",
1339 ceu_rect
->width
, ceu_rect
->height
,
1340 ceu_rect
->left
, ceu_rect
->top
);
1343 * 11. Calculate CEU scales from camera scales from results of (10) and
1344 * user window from (3)
1346 scale_ceu_h
= calc_scale(ceu_rect
->width
, &out_width
);
1347 scale_ceu_v
= calc_scale(ceu_rect
->height
, &out_height
);
1349 dev_geo(dev
, "11: CEU scales %u:%u\n", scale_ceu_h
, scale_ceu_v
);
1351 /* 12. Apply CEU scales. */
1352 cflcr
= scale_ceu_h
| (scale_ceu_v
<< 16);
1353 if (cflcr
!= pcdev
->cflcr
) {
1354 pcdev
->cflcr
= cflcr
;
1355 ceu_write(pcdev
, CFLCR
, cflcr
);
1358 /* Restore capture */
1361 capture_restore(pcdev
, capsr
);
1363 icd
->user_width
= out_width
;
1364 icd
->user_height
= out_height
;
1366 /* Even if only camera cropping succeeded */
1370 /* Similar to set_crop multistage iterative algorithm */
1371 static int sh_mobile_ceu_set_fmt(struct soc_camera_device
*icd
,
1372 struct v4l2_format
*f
)
1374 struct soc_camera_host
*ici
= to_soc_camera_host(icd
->dev
.parent
);
1375 struct sh_mobile_ceu_dev
*pcdev
= ici
->priv
;
1376 struct sh_mobile_ceu_cam
*cam
= icd
->host_priv
;
1377 struct v4l2_pix_format
*pix
= &f
->fmt
.pix
;
1378 struct v4l2_format cam_f
= *f
;
1379 struct v4l2_pix_format
*cam_pix
= &cam_f
.fmt
.pix
;
1380 struct v4l2_subdev
*sd
= soc_camera_to_subdev(icd
);
1381 struct device
*dev
= icd
->dev
.parent
;
1382 __u32 pixfmt
= pix
->pixelformat
;
1383 const struct soc_camera_format_xlate
*xlate
;
1384 struct v4l2_crop cam_crop
;
1385 struct v4l2_rect
*cam_rect
= &cam_crop
.c
, cam_subrect
, ceu_rect
;
1386 unsigned int scale_cam_h
, scale_cam_v
;
1387 u16 scale_v
, scale_h
;
1389 bool is_interlaced
, image_mode
;
1391 switch (pix
->field
) {
1392 case V4L2_FIELD_INTERLACED
:
1393 is_interlaced
= true;
1395 case V4L2_FIELD_ANY
:
1397 pix
->field
= V4L2_FIELD_NONE
;
1399 case V4L2_FIELD_NONE
:
1400 is_interlaced
= false;
1404 xlate
= soc_camera_xlate_by_fourcc(icd
, pixfmt
);
1406 dev_warn(dev
, "Format %x not found\n", pixfmt
);
1410 /* 1. Calculate current camera scales. */
1411 cam_crop
.type
= V4L2_BUF_TYPE_VIDEO_CAPTURE
;
1413 ret
= client_g_rect(sd
, cam_rect
);
1417 ret
= get_camera_scales(sd
, cam_rect
, &scale_cam_h
, &scale_cam_v
);
1421 dev_geo(dev
, "1: camera scales %u:%u\n", scale_cam_h
, scale_cam_v
);
1424 * 2. Calculate "effective" input crop (sensor subwindow) - CEU crop
1425 * scaled back at current camera scales onto input window.
1427 ret
= get_camera_subwin(icd
, &cam_subrect
, scale_cam_h
, scale_cam_v
);
1431 dev_geo(dev
, "2: subwin %ux%u@%u:%u\n",
1432 cam_subrect
.width
, cam_subrect
.height
,
1433 cam_subrect
.left
, cam_subrect
.top
);
1436 * 3. Calculate new combined scales from "effective" input window to
1437 * requested user window.
1439 scale_h
= calc_generic_scale(cam_subrect
.width
, pix
->width
);
1440 scale_v
= calc_generic_scale(cam_subrect
.height
, pix
->height
);
1442 dev_geo(dev
, "3: scales %u:%u\n", scale_h
, scale_v
);
1445 * 4. Calculate camera output window by applying combined scales to real
1448 cam_pix
->width
= scale_down(cam_rect
->width
, scale_h
);
1449 cam_pix
->height
= scale_down(cam_rect
->height
, scale_v
);
1450 cam_pix
->pixelformat
= xlate
->cam_fmt
->fourcc
;
1453 case V4L2_PIX_FMT_NV12
:
1454 case V4L2_PIX_FMT_NV21
:
1455 case V4L2_PIX_FMT_NV16
:
1456 case V4L2_PIX_FMT_NV61
:
1463 dev_geo(dev
, "4: camera output %ux%u\n",
1464 cam_pix
->width
, cam_pix
->height
);
1467 ret
= client_scale(icd
, cam_rect
, &cam_subrect
, &ceu_rect
, &cam_f
,
1468 image_mode
&& !is_interlaced
);
1470 dev_geo(dev
, "5-9: client scale %d\n", ret
);
1472 /* Done with the camera. Now see if we can improve the result */
1474 dev_dbg(dev
, "Camera %d fmt %ux%u, requested %ux%u\n",
1475 ret
, cam_pix
->width
, cam_pix
->height
, pix
->width
, pix
->height
);
1479 /* 10. Use CEU scaling to scale to the requested user window. */
1481 /* We cannot scale up */
1482 if (pix
->width
> cam_pix
->width
)
1483 pix
->width
= cam_pix
->width
;
1484 if (pix
->width
> ceu_rect
.width
)
1485 pix
->width
= ceu_rect
.width
;
1487 if (pix
->height
> cam_pix
->height
)
1488 pix
->height
= cam_pix
->height
;
1489 if (pix
->height
> ceu_rect
.height
)
1490 pix
->height
= ceu_rect
.height
;
1492 /* Let's rock: scale pix->{width x height} down to width x height */
1493 scale_h
= calc_scale(ceu_rect
.width
, &pix
->width
);
1494 scale_v
= calc_scale(ceu_rect
.height
, &pix
->height
);
1496 dev_geo(dev
, "10: W: %u : 0x%x = %u, H: %u : 0x%x = %u\n",
1497 ceu_rect
.width
, scale_h
, pix
->width
,
1498 ceu_rect
.height
, scale_v
, pix
->height
);
1500 pcdev
->cflcr
= scale_h
| (scale_v
<< 16);
1502 icd
->buswidth
= xlate
->buswidth
;
1503 icd
->current_fmt
= xlate
->host_fmt
;
1504 cam
->camera_fmt
= xlate
->cam_fmt
;
1505 cam
->ceu_rect
= ceu_rect
;
1507 pcdev
->is_interlaced
= is_interlaced
;
1508 pcdev
->image_mode
= image_mode
;
1513 static int sh_mobile_ceu_try_fmt(struct soc_camera_device
*icd
,
1514 struct v4l2_format
*f
)
1516 const struct soc_camera_format_xlate
*xlate
;
1517 struct v4l2_pix_format
*pix
= &f
->fmt
.pix
;
1518 struct v4l2_subdev
*sd
= soc_camera_to_subdev(icd
);
1519 __u32 pixfmt
= pix
->pixelformat
;
1523 xlate
= soc_camera_xlate_by_fourcc(icd
, pixfmt
);
1525 dev_warn(icd
->dev
.parent
, "Format %x not found\n", pixfmt
);
1529 /* FIXME: calculate using depth and bus width */
1531 v4l_bound_align_image(&pix
->width
, 2, 2560, 1,
1532 &pix
->height
, 4, 1920, 2, 0);
1535 height
= pix
->height
;
1537 pix
->bytesperline
= pix
->width
*
1538 DIV_ROUND_UP(xlate
->host_fmt
->depth
, 8);
1539 pix
->sizeimage
= pix
->height
* pix
->bytesperline
;
1541 pix
->pixelformat
= xlate
->cam_fmt
->fourcc
;
1543 /* limit to sensor capabilities */
1544 ret
= v4l2_subdev_call(sd
, video
, try_fmt
, f
);
1545 pix
->pixelformat
= pixfmt
;
1550 case V4L2_PIX_FMT_NV12
:
1551 case V4L2_PIX_FMT_NV21
:
1552 case V4L2_PIX_FMT_NV16
:
1553 case V4L2_PIX_FMT_NV61
:
1554 /* FIXME: check against rect_max after converting soc-camera */
1555 /* We can scale precisely, need a bigger image from camera */
1556 if (pix
->width
< width
|| pix
->height
< height
) {
1557 int tmp_w
= pix
->width
, tmp_h
= pix
->height
;
1560 ret
= v4l2_subdev_call(sd
, video
, try_fmt
, f
);
1562 /* Shouldn't actually happen... */
1563 dev_err(icd
->dev
.parent
,
1564 "FIXME: try_fmt() returned %d\n", ret
);
1566 pix
->height
= tmp_h
;
1569 if (pix
->width
> width
)
1571 if (pix
->height
> height
)
1572 pix
->height
= height
;
1578 static int sh_mobile_ceu_reqbufs(struct soc_camera_file
*icf
,
1579 struct v4l2_requestbuffers
*p
)
1584 * This is for locking debugging only. I removed spinlocks and now I
1585 * check whether .prepare is ever called on a linked buffer, or whether
1586 * a dma IRQ can occur for an in-work or unlinked buffer. Until now
1587 * it hadn't triggered
1589 for (i
= 0; i
< p
->count
; i
++) {
1590 struct sh_mobile_ceu_buffer
*buf
;
1592 buf
= container_of(icf
->vb_vidq
.bufs
[i
],
1593 struct sh_mobile_ceu_buffer
, vb
);
1594 INIT_LIST_HEAD(&buf
->vb
.queue
);
1600 static unsigned int sh_mobile_ceu_poll(struct file
*file
, poll_table
*pt
)
1602 struct soc_camera_file
*icf
= file
->private_data
;
1603 struct sh_mobile_ceu_buffer
*buf
;
1605 buf
= list_entry(icf
->vb_vidq
.stream
.next
,
1606 struct sh_mobile_ceu_buffer
, vb
.stream
);
1608 poll_wait(file
, &buf
->vb
.done
, pt
);
1610 if (buf
->vb
.state
== VIDEOBUF_DONE
||
1611 buf
->vb
.state
== VIDEOBUF_ERROR
)
1612 return POLLIN
|POLLRDNORM
;
1617 static int sh_mobile_ceu_querycap(struct soc_camera_host
*ici
,
1618 struct v4l2_capability
*cap
)
1620 strlcpy(cap
->card
, "SuperH_Mobile_CEU", sizeof(cap
->card
));
1621 cap
->version
= KERNEL_VERSION(0, 0, 5);
1622 cap
->capabilities
= V4L2_CAP_VIDEO_CAPTURE
| V4L2_CAP_STREAMING
;
1626 static void sh_mobile_ceu_init_videobuf(struct videobuf_queue
*q
,
1627 struct soc_camera_device
*icd
)
1629 struct soc_camera_host
*ici
= to_soc_camera_host(icd
->dev
.parent
);
1630 struct sh_mobile_ceu_dev
*pcdev
= ici
->priv
;
1632 videobuf_queue_dma_contig_init(q
,
1633 &sh_mobile_ceu_videobuf_ops
,
1634 icd
->dev
.parent
, &pcdev
->lock
,
1635 V4L2_BUF_TYPE_VIDEO_CAPTURE
,
1636 pcdev
->is_interlaced
?
1637 V4L2_FIELD_INTERLACED
: V4L2_FIELD_NONE
,
1638 sizeof(struct sh_mobile_ceu_buffer
),
1642 static int sh_mobile_ceu_get_ctrl(struct soc_camera_device
*icd
,
1643 struct v4l2_control
*ctrl
)
1645 struct soc_camera_host
*ici
= to_soc_camera_host(icd
->dev
.parent
);
1646 struct sh_mobile_ceu_dev
*pcdev
= ici
->priv
;
1650 case V4L2_CID_SHARPNESS
:
1651 val
= ceu_read(pcdev
, CLFCR
);
1652 ctrl
->value
= val
^ 1;
1655 return -ENOIOCTLCMD
;
1658 static int sh_mobile_ceu_set_ctrl(struct soc_camera_device
*icd
,
1659 struct v4l2_control
*ctrl
)
1661 struct soc_camera_host
*ici
= to_soc_camera_host(icd
->dev
.parent
);
1662 struct sh_mobile_ceu_dev
*pcdev
= ici
->priv
;
1665 case V4L2_CID_SHARPNESS
:
1666 switch (icd
->current_fmt
->fourcc
) {
1667 case V4L2_PIX_FMT_NV12
:
1668 case V4L2_PIX_FMT_NV21
:
1669 case V4L2_PIX_FMT_NV16
:
1670 case V4L2_PIX_FMT_NV61
:
1671 ceu_write(pcdev
, CLFCR
, !ctrl
->value
);
1676 return -ENOIOCTLCMD
;
1679 static const struct v4l2_queryctrl sh_mobile_ceu_controls
[] = {
1681 .id
= V4L2_CID_SHARPNESS
,
1682 .type
= V4L2_CTRL_TYPE_BOOLEAN
,
1683 .name
= "Low-pass filter",
1691 static struct soc_camera_host_ops sh_mobile_ceu_host_ops
= {
1692 .owner
= THIS_MODULE
,
1693 .add
= sh_mobile_ceu_add_device
,
1694 .remove
= sh_mobile_ceu_remove_device
,
1695 .get_formats
= sh_mobile_ceu_get_formats
,
1696 .put_formats
= sh_mobile_ceu_put_formats
,
1697 .set_crop
= sh_mobile_ceu_set_crop
,
1698 .set_fmt
= sh_mobile_ceu_set_fmt
,
1699 .try_fmt
= sh_mobile_ceu_try_fmt
,
1700 .set_ctrl
= sh_mobile_ceu_set_ctrl
,
1701 .get_ctrl
= sh_mobile_ceu_get_ctrl
,
1702 .reqbufs
= sh_mobile_ceu_reqbufs
,
1703 .poll
= sh_mobile_ceu_poll
,
1704 .querycap
= sh_mobile_ceu_querycap
,
1705 .set_bus_param
= sh_mobile_ceu_set_bus_param
,
1706 .init_videobuf
= sh_mobile_ceu_init_videobuf
,
1707 .controls
= sh_mobile_ceu_controls
,
1708 .num_controls
= ARRAY_SIZE(sh_mobile_ceu_controls
),
1711 static int __devinit
sh_mobile_ceu_probe(struct platform_device
*pdev
)
1713 struct sh_mobile_ceu_dev
*pcdev
;
1714 struct resource
*res
;
1719 res
= platform_get_resource(pdev
, IORESOURCE_MEM
, 0);
1720 irq
= platform_get_irq(pdev
, 0);
1722 dev_err(&pdev
->dev
, "Not enough CEU platform resources.\n");
1727 pcdev
= kzalloc(sizeof(*pcdev
), GFP_KERNEL
);
1729 dev_err(&pdev
->dev
, "Could not allocate pcdev\n");
1734 INIT_LIST_HEAD(&pcdev
->capture
);
1735 spin_lock_init(&pcdev
->lock
);
1737 pcdev
->pdata
= pdev
->dev
.platform_data
;
1738 if (!pcdev
->pdata
) {
1740 dev_err(&pdev
->dev
, "CEU platform data not set.\n");
1744 base
= ioremap_nocache(res
->start
, resource_size(res
));
1747 dev_err(&pdev
->dev
, "Unable to ioremap CEU registers.\n");
1753 pcdev
->video_limit
= 0; /* only enabled if second resource exists */
1755 res
= platform_get_resource(pdev
, IORESOURCE_MEM
, 1);
1757 err
= dma_declare_coherent_memory(&pdev
->dev
, res
->start
,
1761 DMA_MEMORY_EXCLUSIVE
);
1763 dev_err(&pdev
->dev
, "Unable to declare CEU memory.\n");
1768 pcdev
->video_limit
= resource_size(res
);
1772 err
= request_irq(pcdev
->irq
, sh_mobile_ceu_irq
, IRQF_DISABLED
,
1773 dev_name(&pdev
->dev
), pcdev
);
1775 dev_err(&pdev
->dev
, "Unable to register CEU interrupt.\n");
1776 goto exit_release_mem
;
1779 pm_suspend_ignore_children(&pdev
->dev
, true);
1780 pm_runtime_enable(&pdev
->dev
);
1781 pm_runtime_resume(&pdev
->dev
);
1783 pcdev
->ici
.priv
= pcdev
;
1784 pcdev
->ici
.v4l2_dev
.dev
= &pdev
->dev
;
1785 pcdev
->ici
.nr
= pdev
->id
;
1786 pcdev
->ici
.drv_name
= dev_name(&pdev
->dev
);
1787 pcdev
->ici
.ops
= &sh_mobile_ceu_host_ops
;
1789 err
= soc_camera_host_register(&pcdev
->ici
);
1796 pm_runtime_disable(&pdev
->dev
);
1797 free_irq(pcdev
->irq
, pcdev
);
1799 if (platform_get_resource(pdev
, IORESOURCE_MEM
, 1))
1800 dma_release_declared_memory(&pdev
->dev
);
1809 static int __devexit
sh_mobile_ceu_remove(struct platform_device
*pdev
)
1811 struct soc_camera_host
*soc_host
= to_soc_camera_host(&pdev
->dev
);
1812 struct sh_mobile_ceu_dev
*pcdev
= container_of(soc_host
,
1813 struct sh_mobile_ceu_dev
, ici
);
1815 soc_camera_host_unregister(soc_host
);
1816 pm_runtime_disable(&pdev
->dev
);
1817 free_irq(pcdev
->irq
, pcdev
);
1818 if (platform_get_resource(pdev
, IORESOURCE_MEM
, 1))
1819 dma_release_declared_memory(&pdev
->dev
);
1820 iounmap(pcdev
->base
);
1825 static int sh_mobile_ceu_runtime_nop(struct device
*dev
)
1827 /* Runtime PM callback shared between ->runtime_suspend()
1828 * and ->runtime_resume(). Simply returns success.
1830 * This driver re-initializes all registers after
1831 * pm_runtime_get_sync() anyway so there is no need
1832 * to save and restore registers here.
1837 static const struct dev_pm_ops sh_mobile_ceu_dev_pm_ops
= {
1838 .runtime_suspend
= sh_mobile_ceu_runtime_nop
,
1839 .runtime_resume
= sh_mobile_ceu_runtime_nop
,
1842 static struct platform_driver sh_mobile_ceu_driver
= {
1844 .name
= "sh_mobile_ceu",
1845 .pm
= &sh_mobile_ceu_dev_pm_ops
,
1847 .probe
= sh_mobile_ceu_probe
,
1848 .remove
= __devexit_p(sh_mobile_ceu_remove
),
1851 static int __init
sh_mobile_ceu_init(void)
1853 return platform_driver_register(&sh_mobile_ceu_driver
);
1856 static void __exit
sh_mobile_ceu_exit(void)
1858 platform_driver_unregister(&sh_mobile_ceu_driver
);
1861 module_init(sh_mobile_ceu_init
);
1862 module_exit(sh_mobile_ceu_exit
);
1864 MODULE_DESCRIPTION("SuperH Mobile CEU driver");
1865 MODULE_AUTHOR("Magnus Damm");
1866 MODULE_LICENSE("GPL");
1867 MODULE_ALIAS("platform:sh_mobile_ceu");