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>
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>
41 /* register offsets for sh7722 / sh7723 */
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 */
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
;
83 struct sh_mobile_ceu_dev
{
84 struct soc_camera_host ici
;
85 struct soc_camera_device
*icd
;
89 unsigned long video_limit
;
91 /* lock used to protect videobuf */
93 struct list_head capture
;
94 struct videobuf_buffer
*active
;
96 struct sh_mobile_ceu_info
*pdata
;
100 unsigned int is_interlaced
:1;
101 unsigned int image_mode
:1;
102 unsigned int is_16bit
:1;
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
;
112 static unsigned long make_bus_param(struct sh_mobile_ceu_dev
*pcdev
)
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
;
124 if (pcdev
->pdata
->flags
& SH_CEU_FLAG_USE_8BIT_BUS
)
125 flags
|= SOCAM_DATAWIDTH_8
;
127 if (pcdev
->pdata
->flags
& SH_CEU_FLAG_USE_16BIT_BUS
)
128 flags
|= SOCAM_DATAWIDTH_16
;
130 if (flags
& SOCAM_DATAWIDTH_MASK
)
136 static void ceu_write(struct sh_mobile_ceu_dev
*priv
,
137 unsigned long reg_offs
, u32 data
)
139 iowrite32(data
, priv
->base
+ reg_offs
);
142 static u32
ceu_read(struct sh_mobile_ceu_dev
*priv
, unsigned long reg_offs
)
144 return ioread32(priv
->base
+ reg_offs
);
148 * Videobuf operations
150 static int sh_mobile_ceu_videobuf_setup(struct videobuf_queue
*vq
,
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;
159 *size
= PAGE_ALIGN(icd
->rect_current
.width
* icd
->rect_current
.height
*
165 if (pcdev
->video_limit
) {
166 while (*size
* *count
> pcdev
->video_limit
)
170 dev_dbg(&icd
->dev
, "count=%d, size=%d\n", *count
, *size
);
175 static void free_buffer(struct videobuf_queue
*vq
,
176 struct sh_mobile_ceu_buffer
*buf
)
178 struct soc_camera_device
*icd
= vq
->priv_data
;
180 dev_dbg(&icd
->dev
, "%s (vb=0x%p) 0x%08lx %zd\n", __func__
,
181 &buf
->vb
, buf
->vb
.baddr
, buf
->vb
.bsize
);
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
;
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) */
198 static void sh_mobile_ceu_capture(struct sh_mobile_ceu_dev
*pcdev
)
200 struct soc_camera_device
*icd
= pcdev
->icd
;
201 dma_addr_t phys_addr_top
, phys_addr_bottom
;
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.
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
);
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
);
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
);
238 pcdev
->active
->state
= VIDEOBUF_ACTIVE
;
239 ceu_write(pcdev
, CAPSR
, 0x1); /* start capture */
242 static int sh_mobile_ceu_videobuf_prepare(struct videobuf_queue
*vq
,
243 struct videobuf_buffer
*vb
,
244 enum v4l2_field field
)
246 struct soc_camera_device
*icd
= vq
->priv_data
;
247 struct sh_mobile_ceu_buffer
*buf
;
250 buf
= container_of(vb
, struct sh_mobile_ceu_buffer
, vb
);
252 dev_dbg(&icd
->dev
, "%s (vb=0x%p) 0x%08lx %zd\n", __func__
,
253 vb
, vb
->baddr
, vb
->bsize
);
255 /* Added list head initialization on alloc */
256 WARN_ON(!list_empty(&vb
->queue
));
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
);
264 BUG_ON(NULL
== icd
->current_fmt
);
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
;
274 vb
->state
= VIDEOBUF_NEEDS_INIT
;
277 vb
->size
= vb
->width
* vb
->height
* ((buf
->fmt
->depth
+ 7) >> 3);
278 if (0 != vb
->baddr
&& vb
->bsize
< vb
->size
) {
283 if (vb
->state
== VIDEOBUF_NEEDS_INIT
) {
284 ret
= videobuf_iolock(vq
, vb
, NULL
);
287 vb
->state
= VIDEOBUF_PREPARED
;
292 free_buffer(vq
, buf
);
297 /* Called under spinlock_irqsave(&pcdev->lock, ...) */
298 static void sh_mobile_ceu_videobuf_queue(struct videobuf_queue
*vq
,
299 struct videobuf_buffer
*vb
)
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
;
305 dev_dbg(&icd
->dev
, "%s (vb=0x%p) 0x%08lx %zd\n", __func__
,
306 vb
, vb
->baddr
, vb
->bsize
);
308 vb
->state
= VIDEOBUF_QUEUED
;
309 list_add_tail(&vb
->queue
, &pcdev
->capture
);
311 if (!pcdev
->active
) {
313 sh_mobile_ceu_capture(pcdev
);
317 static void sh_mobile_ceu_videobuf_release(struct videobuf_queue
*vq
,
318 struct videobuf_buffer
*vb
)
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
;
325 spin_lock_irqsave(&pcdev
->lock
, flags
);
327 if (pcdev
->active
== vb
) {
328 /* disable capture (release DMA buffer), reset */
329 ceu_write(pcdev
, CAPSR
, 1 << 16);
330 pcdev
->active
= NULL
;
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
);
339 spin_unlock_irqrestore(&pcdev
->lock
, flags
);
341 free_buffer(vq
, container_of(vb
, struct sh_mobile_ceu_buffer
, vb
));
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
,
351 static irqreturn_t
sh_mobile_ceu_irq(int irq
, void *data
)
353 struct sh_mobile_ceu_dev
*pcdev
= data
;
354 struct videobuf_buffer
*vb
;
357 spin_lock_irqsave(&pcdev
->lock
, flags
);
361 /* Stale interrupt from a released buffer */
364 list_del_init(&vb
->queue
);
366 if (!list_empty(&pcdev
->capture
))
367 pcdev
->active
= list_entry(pcdev
->capture
.next
,
368 struct videobuf_buffer
, queue
);
370 pcdev
->active
= NULL
;
372 sh_mobile_ceu_capture(pcdev
);
374 vb
->state
= VIDEOBUF_DONE
;
375 do_gettimeofday(&vb
->ts
);
380 spin_unlock_irqrestore(&pcdev
->lock
, flags
);
385 /* Called with .video_lock held */
386 static int sh_mobile_ceu_add_device(struct soc_camera_device
*icd
)
388 struct soc_camera_host
*ici
= to_soc_camera_host(icd
->dev
.parent
);
389 struct sh_mobile_ceu_dev
*pcdev
= ici
->priv
;
395 "SuperH Mobile CEU driver attached to camera %d\n",
398 clk_enable(pcdev
->clk
);
400 ceu_write(pcdev
, CAPSR
, 1 << 16); /* reset */
401 while (ceu_read(pcdev
, CSTSR
) & 1)
409 /* Called with .video_lock held */
410 static void sh_mobile_ceu_remove_device(struct soc_camera_device
*icd
)
412 struct soc_camera_host
*ici
= to_soc_camera_host(icd
->dev
.parent
);
413 struct sh_mobile_ceu_dev
*pcdev
= ici
->priv
;
416 BUG_ON(icd
!= pcdev
->icd
);
418 /* disable capture, disable interrupts */
419 ceu_write(pcdev
, CEIER
, 0);
420 ceu_write(pcdev
, CAPSR
, 1 << 16); /* reset */
422 /* make sure active buffer is canceled */
423 spin_lock_irqsave(&pcdev
->lock
, flags
);
425 list_del(&pcdev
->active
->queue
);
426 pcdev
->active
->state
= VIDEOBUF_ERROR
;
427 wake_up_all(&pcdev
->active
->done
);
428 pcdev
->active
= NULL
;
430 spin_unlock_irqrestore(&pcdev
->lock
, flags
);
432 clk_disable(pcdev
->clk
);
435 "SuperH Mobile CEU driver detached from camera %d\n",
442 * See chapter 29.4.12 "Capture Filter Control Register (CFLCR)"
443 * in SH7722 Hardware Manual
445 static unsigned int size_dst(unsigned int src
, unsigned int scale
)
447 unsigned int mant_pre
= scale
>> 12;
450 return ((mant_pre
+ 2 * (src
- 1)) / (2 * mant_pre
) - 1) *
451 mant_pre
* 4096 / scale
+ 1;
454 static unsigned int size_src(unsigned int dst
, unsigned int scale
)
456 unsigned int mant_pre
= scale
>> 12, tmp
;
459 for (tmp
= ((dst
- 1) * scale
+ 2048 * mant_pre
) / 4096 + 1;
460 size_dst(tmp
, scale
) < dst
;
466 static u16
calc_scale(unsigned int src
, unsigned int *dst
)
473 scale
= (src
* 4096 / *dst
) & ~7;
475 while (scale
> 4096 && size_dst(src
, scale
) < *dst
)
478 *dst
= size_dst(src
, scale
);
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
)
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;
496 /* Switch to the camera scale */
497 left
= size_src(rect
->left
, hscale
);
498 top
= size_src(rect
->top
, vscale
);
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
);
503 if (left
> cam
->camera_rect
.left
) {
504 left_offset
= left
- cam
->camera_rect
.left
;
507 left
= cam
->camera_rect
.left
;
510 if (top
> cam
->camera_rect
.top
) {
511 top_offset
= top
- cam
->camera_rect
.top
;
514 top
= cam
->camera_rect
.top
;
517 dev_dbg(&icd
->dev
, "New left %u, top %u, offsets %u:%u\n",
518 rect
->left
, rect
->top
, left_offset
, top_offset
);
520 if (pcdev
->image_mode
) {
522 in_width
= cam
->camera_rect
.width
;
523 if (!pcdev
->is_16bit
) {
528 cfszr_width
= cdwdr_width
= rect
->width
;
530 unsigned int w_factor
= (icd
->current_fmt
->depth
+ 7) >> 3;
531 if (!pcdev
->is_16bit
)
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;
538 cfszr_width
= pcdev
->is_16bit
? width
: width
/ 2;
539 cdwdr_width
= pcdev
->is_16bit
? width
* 2 : width
;
542 height
= rect
->height
;
543 in_height
= cam
->camera_rect
.height
;
544 if (pcdev
->is_interlaced
) {
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
);
558 static u32
capture_save_reset(struct sh_mobile_ceu_dev
*pcdev
)
560 u32 capsr
= ceu_read(pcdev
, CAPSR
);
561 ceu_write(pcdev
, CAPSR
, 1 << 16); /* reset, stop capture */
565 static void capture_restore(struct sh_mobile_ceu_dev
*pcdev
, u32 capsr
)
567 unsigned long timeout
= jiffies
+ 10 * HZ
;
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.
573 while ((ceu_read(pcdev
, CSTSR
) & 1) && time_before(jiffies
, timeout
))
576 if (time_after(jiffies
, timeout
)) {
577 dev_err(pcdev
->ici
.v4l2_dev
.dev
,
578 "Timeout waiting for frame end! Interface problem?\n");
582 /* Wait until reset clears, this shall not hang... */
583 while (ceu_read(pcdev
, CAPSR
) & (1 << 16))
586 /* Anything to restore? */
587 if (capsr
& ~(1 << 16))
588 ceu_write(pcdev
, CAPSR
, capsr
);
591 static int sh_mobile_ceu_set_bus_param(struct soc_camera_device
*icd
,
594 struct soc_camera_host
*ici
= to_soc_camera_host(icd
->dev
.parent
);
595 struct sh_mobile_ceu_dev
*pcdev
= ici
->priv
;
597 unsigned long camera_flags
, common_flags
, value
;
599 struct sh_mobile_ceu_cam
*cam
= icd
->host_priv
;
600 u32 capsr
= capture_save_reset(pcdev
);
602 camera_flags
= icd
->ops
->query_bus_param(icd
);
603 common_flags
= soc_camera_bus_param_compatible(camera_flags
,
604 make_bus_param(pcdev
));
608 ret
= icd
->ops
->set_bus_param(icd
, common_flags
);
612 switch (common_flags
& SOCAM_DATAWIDTH_MASK
) {
613 case SOCAM_DATAWIDTH_8
:
616 case SOCAM_DATAWIDTH_16
:
623 ceu_write(pcdev
, CRCNTR
, 0);
624 ceu_write(pcdev
, CRCMPR
, 0);
626 value
= 0x00000010; /* data fetch by default */
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 */
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 */
640 case V4L2_PIX_FMT_VYUY
:
641 value
= 0x00000100; /* Cr0, Y0, Cb0, Y1 */
643 case V4L2_PIX_FMT_YUYV
:
644 value
= 0x00000200; /* Y0, Cb0, Y1, Cr0 */
646 case V4L2_PIX_FMT_YVYU
:
647 value
= 0x00000300; /* Y0, Cr0, Y1, Cb0 */
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 */
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
);
663 ceu_write(pcdev
, CAPCR
, 0x00300000);
664 ceu_write(pcdev
, CAIFR
, pcdev
->is_interlaced
? 0x101 : 0);
667 sh_mobile_ceu_set_rect(icd
, &icd
->rect_current
);
669 ceu_write(pcdev
, CFLCR
, pcdev
->cflcr
);
671 /* A few words about byte order (observed in Big Endian mode)
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)
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)
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
685 value
&= ~0x00000010; /* convert 4:2:2 -> 4:2:0 */
687 ceu_write(pcdev
, CDOCR
, value
);
688 ceu_write(pcdev
, CFWCR
, 0); /* keep "datafetch firewall" disabled */
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
);
696 capture_restore(pcdev
, capsr
);
698 /* not in bundle mode: skip CBDSR, CDAYR2, CDACR2, CDBYR2, CDBCR2 */
702 static int sh_mobile_ceu_try_bus_param(struct soc_camera_device
*icd
)
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
;
708 camera_flags
= icd
->ops
->query_bus_param(icd
);
709 common_flags
= soc_camera_bus_param_compatible(camera_flags
,
710 make_bus_param(pcdev
));
717 static const struct soc_camera_data_format sh_mobile_ceu_formats
[] = {
721 .fourcc
= V4L2_PIX_FMT_NV12
,
722 .colorspace
= V4L2_COLORSPACE_JPEG
,
727 .fourcc
= V4L2_PIX_FMT_NV21
,
728 .colorspace
= V4L2_COLORSPACE_JPEG
,
733 .fourcc
= V4L2_PIX_FMT_NV16
,
734 .colorspace
= V4L2_COLORSPACE_JPEG
,
739 .fourcc
= V4L2_PIX_FMT_NV61
,
740 .colorspace
= V4L2_COLORSPACE_JPEG
,
744 static int sh_mobile_ceu_get_formats(struct soc_camera_device
*icd
, int idx
,
745 struct soc_camera_format_xlate
*xlate
)
747 struct soc_camera_host
*ici
= to_soc_camera_host(icd
->dev
.parent
);
750 struct sh_mobile_ceu_cam
*cam
;
752 ret
= sh_mobile_ceu_try_bus_param(icd
);
756 if (!icd
->host_priv
) {
757 cam
= kzalloc(sizeof(*cam
), GFP_KERNEL
);
761 icd
->host_priv
= cam
;
762 cam
->camera_max
= icd
->rect_max
;
764 cam
= icd
->host_priv
;
767 /* Beginning of a pass */
769 cam
->extra_fmt
= NULL
;
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
:
777 goto add_single_format
;
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.
788 cam
->extra_fmt
= (void *)sh_mobile_ceu_formats
;
790 n
= ARRAY_SIZE(sh_mobile_ceu_formats
);
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
;
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
);
803 /* Generic pass-through */
806 xlate
->host_fmt
= icd
->formats
+ idx
;
807 xlate
->cam_fmt
= icd
->formats
+ idx
;
808 xlate
->buswidth
= icd
->formats
[idx
].depth
;
810 dev_dbg(ici
->v4l2_dev
.dev
,
811 "Providing format %s in pass-through mode\n",
812 icd
->formats
[idx
].name
);
819 static void sh_mobile_ceu_put_formats(struct soc_camera_device
*icd
)
821 kfree(icd
->host_priv
);
822 icd
->host_priv
= NULL
;
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
)
828 return r1
->width
< r2
->width
|| r1
->height
< r2
->height
;
831 /* Check if r1 fails to cover r2 */
832 static bool is_inside(struct v4l2_rect
*r1
, struct v4l2_rect
*r2
)
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
;
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
848 static int sh_mobile_ceu_set_crop(struct soc_camera_device
*icd
,
849 struct v4l2_rect
*rect
)
851 struct soc_camera_host
*ici
= to_soc_camera_host(icd
->dev
.parent
);
852 struct sh_mobile_ceu_dev
*pcdev
= ici
->priv
;
853 struct v4l2_rect cam_rect
, target
, cam_max
;
854 struct sh_mobile_ceu_cam
*cam
= icd
->host_priv
;
855 unsigned int hscale
= pcdev
->cflcr
& 0xffff;
856 unsigned int vscale
= (pcdev
->cflcr
>> 16) & 0xffff;
857 unsigned short width
, height
;
861 /* Scale back up into client units */
862 cam_rect
.left
= size_src(rect
->left
, hscale
);
863 cam_rect
.width
= size_src(rect
->width
, hscale
);
864 cam_rect
.top
= size_src(rect
->top
, vscale
);
865 cam_rect
.height
= size_src(rect
->height
, vscale
);
869 capsr
= capture_save_reset(pcdev
);
870 dev_dbg(&icd
->dev
, "CAPSR 0x%x, CFLCR 0x%x\n", capsr
, pcdev
->cflcr
);
872 /* First attempt - see if the client can deliver a perfect result */
873 ret
= icd
->ops
->set_crop(icd
, &cam_rect
);
874 if (!ret
&& !memcmp(&target
, &cam_rect
, sizeof(target
))) {
875 dev_dbg(&icd
->dev
, "Camera S_CROP successful for %ux%u@%u:%u\n",
876 cam_rect
.width
, cam_rect
.height
,
877 cam_rect
.left
, cam_rect
.top
);
881 /* Try to fix cropping, that camera hasn't managed to do */
882 dev_dbg(&icd
->dev
, "Fix camera S_CROP %d for %ux%u@%u:%u"
884 ret
, cam_rect
.width
, cam_rect
.height
,
885 cam_rect
.left
, cam_rect
.top
,
886 target
.width
, target
.height
, target
.left
, target
.top
);
889 * Popular special case - some cameras can only handle fixed sizes like
890 * QVGA, VGA,... Take care to avoid infinite loop.
892 width
= max(cam_rect
.width
, 1);
893 height
= max(cam_rect
.height
, 1);
894 cam_max
.width
= size_src(icd
->rect_max
.width
, hscale
);
895 cam_max
.left
= size_src(icd
->rect_max
.left
, hscale
);
896 cam_max
.height
= size_src(icd
->rect_max
.height
, vscale
);
897 cam_max
.top
= size_src(icd
->rect_max
.top
, vscale
);
898 while (!ret
&& (is_smaller(&cam_rect
, &target
) ||
899 is_inside(&cam_rect
, &target
)) &&
900 cam_max
.width
>= width
&& cam_max
.height
>= height
) {
904 cam_rect
.width
= width
;
905 cam_rect
.height
= height
;
907 /* We do not know what the camera is capable of, play safe */
908 if (cam_rect
.left
> target
.left
)
909 cam_rect
.left
= cam_max
.left
;
911 if (cam_rect
.left
+ cam_rect
.width
< target
.left
+ target
.width
)
912 cam_rect
.width
= target
.left
+ target
.width
-
915 if (cam_rect
.top
> target
.top
)
916 cam_rect
.top
= cam_max
.top
;
918 if (cam_rect
.top
+ cam_rect
.height
< target
.top
+ target
.height
)
919 cam_rect
.height
= target
.top
+ target
.height
-
922 if (cam_rect
.width
+ cam_rect
.left
>
923 cam_max
.width
+ cam_max
.left
)
924 cam_rect
.left
= max(cam_max
.width
+ cam_max
.left
-
925 cam_rect
.width
, cam_max
.left
);
927 if (cam_rect
.height
+ cam_rect
.top
>
928 cam_max
.height
+ cam_max
.top
)
929 cam_rect
.top
= max(cam_max
.height
+ cam_max
.top
-
930 cam_rect
.height
, cam_max
.top
);
932 ret
= icd
->ops
->set_crop(icd
, &cam_rect
);
933 dev_dbg(&icd
->dev
, "Camera S_CROP %d for %ux%u@%u:%u\n",
934 ret
, cam_rect
.width
, cam_rect
.height
,
935 cam_rect
.left
, cam_rect
.top
);
939 * If the camera failed to configure cropping, it should not modify the
942 if ((ret
< 0 && (is_smaller(&icd
->rect_current
, rect
) ||
943 is_inside(&icd
->rect_current
, rect
))) ||
944 is_smaller(&cam_rect
, &target
) || is_inside(&cam_rect
, &target
)) {
946 * The camera failed to configure a suitable cropping,
947 * we cannot use the current rectangle, set to max
950 ret
= icd
->ops
->set_crop(icd
, &cam_rect
);
951 dev_dbg(&icd
->dev
, "Camera S_CROP %d for max %ux%u@%u:%u\n",
952 ret
, cam_rect
.width
, cam_rect
.height
,
953 cam_rect
.left
, cam_rect
.top
);
955 /* All failed, hopefully resume current capture */
958 /* Finally, adjust the target rectangle */
959 if (target
.width
> cam_rect
.width
)
960 target
.width
= cam_rect
.width
;
961 if (target
.height
> cam_rect
.height
)
962 target
.height
= cam_rect
.height
;
963 if (target
.left
+ target
.width
> cam_rect
.left
+ cam_rect
.width
)
964 target
.left
= cam_rect
.left
+ cam_rect
.width
-
966 if (target
.top
+ target
.height
> cam_rect
.top
+ cam_rect
.height
)
967 target
.top
= cam_rect
.top
+ cam_rect
.height
-
971 /* We now have a rectangle, larger than requested, let's crop */
974 * We have to preserve camera rectangle between close() / open(),
975 * because soc-camera core calls .set_fmt() on each first open() with
976 * last before last close() _user_ rectangle, which can be different
977 * from camera rectangle.
980 "SH S_CROP from %ux%u@%u:%u to %ux%u@%u:%u, scale to %ux%u@%u:%u\n",
981 cam_rect
.width
, cam_rect
.height
, cam_rect
.left
, cam_rect
.top
,
982 target
.width
, target
.height
, target
.left
, target
.top
,
983 rect
->width
, rect
->height
, rect
->left
, rect
->top
);
988 cam
->camera_rect
= cam_rect
;
990 rect
->width
= size_dst(target
.width
, hscale
);
991 rect
->left
= size_dst(target
.left
, hscale
);
992 rect
->height
= size_dst(target
.height
, vscale
);
993 rect
->top
= size_dst(target
.top
, vscale
);
995 sh_mobile_ceu_set_rect(icd
, rect
);
998 /* Set CAMOR, CAPWR, CFSZR, take care of CDWDR */
1001 capture_restore(pcdev
, capsr
);
1003 /* Even if only camera cropping succeeded */
1007 /* Similar to set_crop multistage iterative algorithm */
1008 static int sh_mobile_ceu_set_fmt(struct soc_camera_device
*icd
,
1009 struct v4l2_format
*f
)
1011 struct soc_camera_host
*ici
= to_soc_camera_host(icd
->dev
.parent
);
1012 struct sh_mobile_ceu_dev
*pcdev
= ici
->priv
;
1013 struct sh_mobile_ceu_cam
*cam
= icd
->host_priv
;
1014 struct v4l2_pix_format
*pix
= &f
->fmt
.pix
;
1015 __u32 pixfmt
= pix
->pixelformat
;
1016 const struct soc_camera_format_xlate
*xlate
;
1017 unsigned int width
= pix
->width
, height
= pix
->height
, tmp_w
, tmp_h
;
1019 int ret
, is_interlaced
;
1021 switch (pix
->field
) {
1022 case V4L2_FIELD_INTERLACED
:
1025 case V4L2_FIELD_ANY
:
1027 pix
->field
= V4L2_FIELD_NONE
;
1029 case V4L2_FIELD_NONE
:
1034 xlate
= soc_camera_xlate_by_fourcc(icd
, pixfmt
);
1036 dev_warn(ici
->v4l2_dev
.dev
, "Format %x not found\n", pixfmt
);
1040 pix
->pixelformat
= xlate
->cam_fmt
->fourcc
;
1041 ret
= v4l2_device_call_until_err(&ici
->v4l2_dev
, (__u32
)icd
, video
, s_fmt
, f
);
1042 pix
->pixelformat
= pixfmt
;
1043 dev_dbg(&icd
->dev
, "Camera %d fmt %ux%u, requested %ux%u, max %ux%u\n",
1044 ret
, pix
->width
, pix
->height
, width
, height
,
1045 icd
->rect_max
.width
, icd
->rect_max
.height
);
1050 case V4L2_PIX_FMT_NV12
:
1051 case V4L2_PIX_FMT_NV21
:
1052 case V4L2_PIX_FMT_NV16
:
1053 case V4L2_PIX_FMT_NV61
:
1054 pcdev
->image_mode
= 1;
1057 pcdev
->image_mode
= 0;
1060 if ((abs(width
- pix
->width
) < 4 && abs(height
- pix
->height
) < 4) ||
1061 !pcdev
->image_mode
|| is_interlaced
) {
1067 /* Camera set a format, but geometry is not precise, try to improve */
1069 * FIXME: when soc-camera is converted to implement traditional S_FMT
1070 * and S_CROP semantics, replace CEU limits with camera maxima
1073 tmp_h
= pix
->height
;
1074 while ((width
> tmp_w
|| height
> tmp_h
) &&
1075 tmp_w
< 2560 && tmp_h
< 1920) {
1076 tmp_w
= min(2 * tmp_w
, (__u32
)2560);
1077 tmp_h
= min(2 * tmp_h
, (__u32
)1920);
1079 pix
->height
= tmp_h
;
1080 pix
->pixelformat
= xlate
->cam_fmt
->fourcc
;
1081 ret
= v4l2_device_call_until_err(&ici
->v4l2_dev
, (__u32
)icd
,
1083 pix
->pixelformat
= pixfmt
;
1084 dev_dbg(&icd
->dev
, "Camera scaled to %ux%u\n",
1085 pix
->width
, pix
->height
);
1087 /* This shouldn't happen */
1088 dev_err(&icd
->dev
, "Client failed to set format: %d\n",
1094 /* We cannot scale up */
1095 if (width
> pix
->width
)
1098 if (height
> pix
->height
)
1099 height
= pix
->height
;
1101 /* Let's rock: scale pix->{width x height} down to width x height */
1102 hscale
= calc_scale(pix
->width
, &width
);
1103 vscale
= calc_scale(pix
->height
, &height
);
1105 dev_dbg(&icd
->dev
, "W: %u : 0x%x = %u, H: %u : 0x%x = %u\n",
1106 pix
->width
, hscale
, width
, pix
->height
, vscale
, height
);
1109 pcdev
->cflcr
= hscale
| (vscale
<< 16);
1111 icd
->buswidth
= xlate
->buswidth
;
1112 icd
->current_fmt
= xlate
->host_fmt
;
1113 cam
->camera_fmt
= xlate
->cam_fmt
;
1114 cam
->camera_rect
.width
= pix
->width
;
1115 cam
->camera_rect
.height
= pix
->height
;
1117 icd
->rect_max
.left
= size_dst(cam
->camera_max
.left
, hscale
);
1118 icd
->rect_max
.width
= size_dst(cam
->camera_max
.width
, hscale
);
1119 icd
->rect_max
.top
= size_dst(cam
->camera_max
.top
, vscale
);
1120 icd
->rect_max
.height
= size_dst(cam
->camera_max
.height
, vscale
);
1122 icd
->rect_current
.left
= icd
->rect_max
.left
;
1123 icd
->rect_current
.top
= icd
->rect_max
.top
;
1125 pcdev
->is_interlaced
= is_interlaced
;
1128 pix
->height
= height
;
1133 static int sh_mobile_ceu_try_fmt(struct soc_camera_device
*icd
,
1134 struct v4l2_format
*f
)
1136 struct soc_camera_host
*ici
= to_soc_camera_host(icd
->dev
.parent
);
1137 const struct soc_camera_format_xlate
*xlate
;
1138 struct v4l2_pix_format
*pix
= &f
->fmt
.pix
;
1139 __u32 pixfmt
= pix
->pixelformat
;
1143 xlate
= soc_camera_xlate_by_fourcc(icd
, pixfmt
);
1145 dev_warn(ici
->v4l2_dev
.dev
, "Format %x not found\n", pixfmt
);
1149 /* FIXME: calculate using depth and bus width */
1151 v4l_bound_align_image(&pix
->width
, 2, 2560, 1,
1152 &pix
->height
, 4, 1920, 2, 0);
1155 height
= pix
->height
;
1157 pix
->bytesperline
= pix
->width
*
1158 DIV_ROUND_UP(xlate
->host_fmt
->depth
, 8);
1159 pix
->sizeimage
= pix
->height
* pix
->bytesperline
;
1161 pix
->pixelformat
= xlate
->cam_fmt
->fourcc
;
1163 /* limit to sensor capabilities */
1164 ret
= v4l2_device_call_until_err(&ici
->v4l2_dev
, (__u32
)icd
, video
,
1166 pix
->pixelformat
= pixfmt
;
1171 case V4L2_PIX_FMT_NV12
:
1172 case V4L2_PIX_FMT_NV21
:
1173 case V4L2_PIX_FMT_NV16
:
1174 case V4L2_PIX_FMT_NV61
:
1175 /* FIXME: check against rect_max after converting soc-camera */
1176 /* We can scale precisely, need a bigger image from camera */
1177 if (pix
->width
< width
|| pix
->height
< height
) {
1178 int tmp_w
= pix
->width
, tmp_h
= pix
->height
;
1181 ret
= v4l2_device_call_until_err(&ici
->v4l2_dev
,
1185 /* Shouldn't actually happen... */
1187 "FIXME: try_fmt() returned %d\n", ret
);
1189 pix
->height
= tmp_h
;
1192 if (pix
->width
> width
)
1194 if (pix
->height
> height
)
1195 pix
->height
= height
;
1201 static int sh_mobile_ceu_reqbufs(struct soc_camera_file
*icf
,
1202 struct v4l2_requestbuffers
*p
)
1206 /* This is for locking debugging only. I removed spinlocks and now I
1207 * check whether .prepare is ever called on a linked buffer, or whether
1208 * a dma IRQ can occur for an in-work or unlinked buffer. Until now
1209 * it hadn't triggered */
1210 for (i
= 0; i
< p
->count
; i
++) {
1211 struct sh_mobile_ceu_buffer
*buf
;
1213 buf
= container_of(icf
->vb_vidq
.bufs
[i
],
1214 struct sh_mobile_ceu_buffer
, vb
);
1215 INIT_LIST_HEAD(&buf
->vb
.queue
);
1221 static unsigned int sh_mobile_ceu_poll(struct file
*file
, poll_table
*pt
)
1223 struct soc_camera_file
*icf
= file
->private_data
;
1224 struct sh_mobile_ceu_buffer
*buf
;
1226 buf
= list_entry(icf
->vb_vidq
.stream
.next
,
1227 struct sh_mobile_ceu_buffer
, vb
.stream
);
1229 poll_wait(file
, &buf
->vb
.done
, pt
);
1231 if (buf
->vb
.state
== VIDEOBUF_DONE
||
1232 buf
->vb
.state
== VIDEOBUF_ERROR
)
1233 return POLLIN
|POLLRDNORM
;
1238 static int sh_mobile_ceu_querycap(struct soc_camera_host
*ici
,
1239 struct v4l2_capability
*cap
)
1241 strlcpy(cap
->card
, "SuperH_Mobile_CEU", sizeof(cap
->card
));
1242 cap
->version
= KERNEL_VERSION(0, 0, 5);
1243 cap
->capabilities
= V4L2_CAP_VIDEO_CAPTURE
| V4L2_CAP_STREAMING
;
1247 static void sh_mobile_ceu_init_videobuf(struct videobuf_queue
*q
,
1248 struct soc_camera_device
*icd
)
1250 struct soc_camera_host
*ici
= to_soc_camera_host(icd
->dev
.parent
);
1251 struct sh_mobile_ceu_dev
*pcdev
= ici
->priv
;
1253 videobuf_queue_dma_contig_init(q
,
1254 &sh_mobile_ceu_videobuf_ops
,
1255 ici
->v4l2_dev
.dev
, &pcdev
->lock
,
1256 V4L2_BUF_TYPE_VIDEO_CAPTURE
,
1257 pcdev
->is_interlaced
?
1258 V4L2_FIELD_INTERLACED
: V4L2_FIELD_NONE
,
1259 sizeof(struct sh_mobile_ceu_buffer
),
1263 static int sh_mobile_ceu_get_ctrl(struct soc_camera_device
*icd
,
1264 struct v4l2_control
*ctrl
)
1266 struct soc_camera_host
*ici
= to_soc_camera_host(icd
->dev
.parent
);
1267 struct sh_mobile_ceu_dev
*pcdev
= ici
->priv
;
1271 case V4L2_CID_SHARPNESS
:
1272 val
= ceu_read(pcdev
, CLFCR
);
1273 ctrl
->value
= val
^ 1;
1276 return -ENOIOCTLCMD
;
1279 static int sh_mobile_ceu_set_ctrl(struct soc_camera_device
*icd
,
1280 struct v4l2_control
*ctrl
)
1282 struct soc_camera_host
*ici
= to_soc_camera_host(icd
->dev
.parent
);
1283 struct sh_mobile_ceu_dev
*pcdev
= ici
->priv
;
1286 case V4L2_CID_SHARPNESS
:
1287 switch (icd
->current_fmt
->fourcc
) {
1288 case V4L2_PIX_FMT_NV12
:
1289 case V4L2_PIX_FMT_NV21
:
1290 case V4L2_PIX_FMT_NV16
:
1291 case V4L2_PIX_FMT_NV61
:
1292 ceu_write(pcdev
, CLFCR
, !ctrl
->value
);
1297 return -ENOIOCTLCMD
;
1300 static const struct v4l2_queryctrl sh_mobile_ceu_controls
[] = {
1302 .id
= V4L2_CID_SHARPNESS
,
1303 .type
= V4L2_CTRL_TYPE_BOOLEAN
,
1304 .name
= "Low-pass filter",
1312 static struct soc_camera_host_ops sh_mobile_ceu_host_ops
= {
1313 .owner
= THIS_MODULE
,
1314 .add
= sh_mobile_ceu_add_device
,
1315 .remove
= sh_mobile_ceu_remove_device
,
1316 .get_formats
= sh_mobile_ceu_get_formats
,
1317 .put_formats
= sh_mobile_ceu_put_formats
,
1318 .set_crop
= sh_mobile_ceu_set_crop
,
1319 .set_fmt
= sh_mobile_ceu_set_fmt
,
1320 .try_fmt
= sh_mobile_ceu_try_fmt
,
1321 .set_ctrl
= sh_mobile_ceu_set_ctrl
,
1322 .get_ctrl
= sh_mobile_ceu_get_ctrl
,
1323 .reqbufs
= sh_mobile_ceu_reqbufs
,
1324 .poll
= sh_mobile_ceu_poll
,
1325 .querycap
= sh_mobile_ceu_querycap
,
1326 .set_bus_param
= sh_mobile_ceu_set_bus_param
,
1327 .init_videobuf
= sh_mobile_ceu_init_videobuf
,
1328 .controls
= sh_mobile_ceu_controls
,
1329 .num_controls
= ARRAY_SIZE(sh_mobile_ceu_controls
),
1332 static int __devinit
sh_mobile_ceu_probe(struct platform_device
*pdev
)
1334 struct sh_mobile_ceu_dev
*pcdev
;
1335 struct resource
*res
;
1340 res
= platform_get_resource(pdev
, IORESOURCE_MEM
, 0);
1341 irq
= platform_get_irq(pdev
, 0);
1343 dev_err(&pdev
->dev
, "Not enough CEU platform resources.\n");
1348 pcdev
= kzalloc(sizeof(*pcdev
), GFP_KERNEL
);
1350 dev_err(&pdev
->dev
, "Could not allocate pcdev\n");
1355 INIT_LIST_HEAD(&pcdev
->capture
);
1356 spin_lock_init(&pcdev
->lock
);
1358 pcdev
->pdata
= pdev
->dev
.platform_data
;
1359 if (!pcdev
->pdata
) {
1361 dev_err(&pdev
->dev
, "CEU platform data not set.\n");
1365 base
= ioremap_nocache(res
->start
, resource_size(res
));
1368 dev_err(&pdev
->dev
, "Unable to ioremap CEU registers.\n");
1374 pcdev
->video_limit
= 0; /* only enabled if second resource exists */
1376 res
= platform_get_resource(pdev
, IORESOURCE_MEM
, 1);
1378 err
= dma_declare_coherent_memory(&pdev
->dev
, res
->start
,
1382 DMA_MEMORY_EXCLUSIVE
);
1384 dev_err(&pdev
->dev
, "Unable to declare CEU memory.\n");
1389 pcdev
->video_limit
= resource_size(res
);
1393 err
= request_irq(pcdev
->irq
, sh_mobile_ceu_irq
, IRQF_DISABLED
,
1394 dev_name(&pdev
->dev
), pcdev
);
1396 dev_err(&pdev
->dev
, "Unable to register CEU interrupt.\n");
1397 goto exit_release_mem
;
1400 pm_suspend_ignore_children(&pdev
->dev
, true);
1401 pm_runtime_enable(&pdev
->dev
);
1402 pm_runtime_resume(&pdev
->dev
);
1404 pcdev
->ici
.priv
= pcdev
;
1405 pcdev
->ici
.v4l2_dev
.dev
= &pdev
->dev
;
1406 pcdev
->ici
.nr
= pdev
->id
;
1407 pcdev
->ici
.drv_name
= dev_name(&pdev
->dev
);
1408 pcdev
->ici
.ops
= &sh_mobile_ceu_host_ops
;
1410 err
= soc_camera_host_register(&pcdev
->ici
);
1417 free_irq(pcdev
->irq
, pcdev
);
1419 if (platform_get_resource(pdev
, IORESOURCE_MEM
, 1))
1420 dma_release_declared_memory(&pdev
->dev
);
1429 static int __devexit
sh_mobile_ceu_remove(struct platform_device
*pdev
)
1431 struct soc_camera_host
*soc_host
= to_soc_camera_host(&pdev
->dev
);
1432 struct sh_mobile_ceu_dev
*pcdev
= container_of(soc_host
,
1433 struct sh_mobile_ceu_dev
, ici
);
1435 soc_camera_host_unregister(soc_host
);
1436 free_irq(pcdev
->irq
, pcdev
);
1437 if (platform_get_resource(pdev
, IORESOURCE_MEM
, 1))
1438 dma_release_declared_memory(&pdev
->dev
);
1439 iounmap(pcdev
->base
);
1444 static int sh_mobile_ceu_runtime_nop(struct device
*dev
)
1446 /* Runtime PM callback shared between ->runtime_suspend()
1447 * and ->runtime_resume(). Simply returns success.
1449 * This driver re-initializes all registers after
1450 * pm_runtime_get_sync() anyway so there is no need
1451 * to save and restore registers here.
1456 static struct dev_pm_ops sh_mobile_ceu_dev_pm_ops
= {
1457 .runtime_suspend
= sh_mobile_ceu_runtime_nop
,
1458 .runtime_resume
= sh_mobile_ceu_runtime_nop
,
1461 static struct platform_driver sh_mobile_ceu_driver
= {
1463 .name
= "sh_mobile_ceu",
1464 .pm
= &sh_mobile_ceu_dev_pm_ops
,
1466 .probe
= sh_mobile_ceu_probe
,
1467 .remove
= __exit_p(sh_mobile_ceu_remove
),
1470 static int __init
sh_mobile_ceu_init(void)
1472 return platform_driver_register(&sh_mobile_ceu_driver
);
1475 static void __exit
sh_mobile_ceu_exit(void)
1477 platform_driver_unregister(&sh_mobile_ceu_driver
);
1480 module_init(sh_mobile_ceu_init
);
1481 module_exit(sh_mobile_ceu_exit
);
1483 MODULE_DESCRIPTION("SuperH Mobile CEU driver");
1484 MODULE_AUTHOR("Magnus Damm");
1485 MODULE_LICENSE("GPL");
1486 MODULE_ALIAS("platform:sh_mobile_ceu");