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/clk.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
{
85 struct soc_camera_host ici
;
86 struct soc_camera_device
*icd
;
91 unsigned long video_limit
;
93 /* lock used to protect videobuf */
95 struct list_head capture
;
96 struct videobuf_buffer
*active
;
99 struct sh_mobile_ceu_info
*pdata
;
101 const struct soc_camera_data_format
*camera_fmt
;
104 static void ceu_write(struct sh_mobile_ceu_dev
*priv
,
105 unsigned long reg_offs
, u32 data
)
107 iowrite32(data
, priv
->base
+ reg_offs
);
110 static u32
ceu_read(struct sh_mobile_ceu_dev
*priv
, unsigned long reg_offs
)
112 return ioread32(priv
->base
+ reg_offs
);
116 * Videobuf operations
118 static int sh_mobile_ceu_videobuf_setup(struct videobuf_queue
*vq
,
122 struct soc_camera_device
*icd
= vq
->priv_data
;
123 struct soc_camera_host
*ici
= to_soc_camera_host(icd
->dev
.parent
);
124 struct sh_mobile_ceu_dev
*pcdev
= ici
->priv
;
125 int bytes_per_pixel
= (icd
->current_fmt
->depth
+ 7) >> 3;
127 *size
= PAGE_ALIGN(icd
->width
* icd
->height
* bytes_per_pixel
);
132 if (pcdev
->video_limit
) {
133 while (*size
* *count
> pcdev
->video_limit
)
137 dev_dbg(&icd
->dev
, "count=%d, size=%d\n", *count
, *size
);
142 static void free_buffer(struct videobuf_queue
*vq
,
143 struct sh_mobile_ceu_buffer
*buf
)
145 struct soc_camera_device
*icd
= vq
->priv_data
;
147 dev_dbg(&icd
->dev
, "%s (vb=0x%p) 0x%08lx %zd\n", __func__
,
148 &buf
->vb
, buf
->vb
.baddr
, buf
->vb
.bsize
);
153 videobuf_dma_contig_free(vq
, &buf
->vb
);
154 dev_dbg(&icd
->dev
, "%s freed\n", __func__
);
155 buf
->vb
.state
= VIDEOBUF_NEEDS_INIT
;
158 #define CEU_CETCR_MAGIC 0x0317f313 /* acknowledge magical interrupt sources */
159 #define CEU_CETCR_IGRW (1 << 4) /* prohibited register access interrupt bit */
160 #define CEU_CEIER_CPEIE (1 << 0) /* one-frame capture end interrupt */
161 #define CEU_CAPCR_CTNCP (1 << 16) /* continuous capture mode (if set) */
164 static void sh_mobile_ceu_capture(struct sh_mobile_ceu_dev
*pcdev
)
166 struct soc_camera_device
*icd
= pcdev
->icd
;
167 dma_addr_t phys_addr_top
, phys_addr_bottom
;
169 /* The hardware is _very_ picky about this sequence. Especially
170 * the CEU_CETCR_MAGIC value. It seems like we need to acknowledge
171 * several not-so-well documented interrupt sources in CETCR.
173 ceu_write(pcdev
, CEIER
, ceu_read(pcdev
, CEIER
) & ~CEU_CEIER_CPEIE
);
174 ceu_write(pcdev
, CETCR
, ~ceu_read(pcdev
, CETCR
) & CEU_CETCR_MAGIC
);
175 ceu_write(pcdev
, CEIER
, ceu_read(pcdev
, CEIER
) | CEU_CEIER_CPEIE
);
176 ceu_write(pcdev
, CAPCR
, ceu_read(pcdev
, CAPCR
) & ~CEU_CAPCR_CTNCP
);
177 ceu_write(pcdev
, CETCR
, CEU_CETCR_MAGIC
^ CEU_CETCR_IGRW
);
182 phys_addr_top
= videobuf_to_dma_contig(pcdev
->active
);
183 ceu_write(pcdev
, CDAYR
, phys_addr_top
);
184 if (pcdev
->is_interlace
) {
185 phys_addr_bottom
= phys_addr_top
+ icd
->width
;
186 ceu_write(pcdev
, CDBYR
, phys_addr_bottom
);
189 switch (icd
->current_fmt
->fourcc
) {
190 case V4L2_PIX_FMT_NV12
:
191 case V4L2_PIX_FMT_NV21
:
192 case V4L2_PIX_FMT_NV16
:
193 case V4L2_PIX_FMT_NV61
:
194 phys_addr_top
+= icd
->width
* icd
->height
;
195 ceu_write(pcdev
, CDACR
, phys_addr_top
);
196 if (pcdev
->is_interlace
) {
197 phys_addr_bottom
= phys_addr_top
+ icd
->width
;
198 ceu_write(pcdev
, CDBCR
, phys_addr_bottom
);
202 pcdev
->active
->state
= VIDEOBUF_ACTIVE
;
203 ceu_write(pcdev
, CAPSR
, 0x1); /* start capture */
206 static int sh_mobile_ceu_videobuf_prepare(struct videobuf_queue
*vq
,
207 struct videobuf_buffer
*vb
,
208 enum v4l2_field field
)
210 struct soc_camera_device
*icd
= vq
->priv_data
;
211 struct sh_mobile_ceu_buffer
*buf
;
214 buf
= container_of(vb
, struct sh_mobile_ceu_buffer
, vb
);
216 dev_dbg(&icd
->dev
, "%s (vb=0x%p) 0x%08lx %zd\n", __func__
,
217 vb
, vb
->baddr
, vb
->bsize
);
219 /* Added list head initialization on alloc */
220 WARN_ON(!list_empty(&vb
->queue
));
223 /* This can be useful if you want to see if we actually fill
224 * the buffer with something */
225 memset((void *)vb
->baddr
, 0xaa, vb
->bsize
);
228 BUG_ON(NULL
== icd
->current_fmt
);
230 if (buf
->fmt
!= icd
->current_fmt
||
231 vb
->width
!= icd
->width
||
232 vb
->height
!= icd
->height
||
233 vb
->field
!= field
) {
234 buf
->fmt
= icd
->current_fmt
;
235 vb
->width
= icd
->width
;
236 vb
->height
= icd
->height
;
238 vb
->state
= VIDEOBUF_NEEDS_INIT
;
241 vb
->size
= vb
->width
* vb
->height
* ((buf
->fmt
->depth
+ 7) >> 3);
242 if (0 != vb
->baddr
&& vb
->bsize
< vb
->size
) {
247 if (vb
->state
== VIDEOBUF_NEEDS_INIT
) {
248 ret
= videobuf_iolock(vq
, vb
, NULL
);
251 vb
->state
= VIDEOBUF_PREPARED
;
256 free_buffer(vq
, buf
);
261 static void sh_mobile_ceu_videobuf_queue(struct videobuf_queue
*vq
,
262 struct videobuf_buffer
*vb
)
264 struct soc_camera_device
*icd
= vq
->priv_data
;
265 struct soc_camera_host
*ici
= to_soc_camera_host(icd
->dev
.parent
);
266 struct sh_mobile_ceu_dev
*pcdev
= ici
->priv
;
269 dev_dbg(&icd
->dev
, "%s (vb=0x%p) 0x%08lx %zd\n", __func__
,
270 vb
, vb
->baddr
, vb
->bsize
);
272 vb
->state
= VIDEOBUF_QUEUED
;
273 spin_lock_irqsave(&pcdev
->lock
, flags
);
274 list_add_tail(&vb
->queue
, &pcdev
->capture
);
276 if (!pcdev
->active
) {
278 sh_mobile_ceu_capture(pcdev
);
281 spin_unlock_irqrestore(&pcdev
->lock
, flags
);
284 static void sh_mobile_ceu_videobuf_release(struct videobuf_queue
*vq
,
285 struct videobuf_buffer
*vb
)
287 free_buffer(vq
, container_of(vb
, struct sh_mobile_ceu_buffer
, vb
));
290 static struct videobuf_queue_ops sh_mobile_ceu_videobuf_ops
= {
291 .buf_setup
= sh_mobile_ceu_videobuf_setup
,
292 .buf_prepare
= sh_mobile_ceu_videobuf_prepare
,
293 .buf_queue
= sh_mobile_ceu_videobuf_queue
,
294 .buf_release
= sh_mobile_ceu_videobuf_release
,
297 static irqreturn_t
sh_mobile_ceu_irq(int irq
, void *data
)
299 struct sh_mobile_ceu_dev
*pcdev
= data
;
300 struct videobuf_buffer
*vb
;
303 spin_lock_irqsave(&pcdev
->lock
, flags
);
306 list_del_init(&vb
->queue
);
308 if (!list_empty(&pcdev
->capture
))
309 pcdev
->active
= list_entry(pcdev
->capture
.next
,
310 struct videobuf_buffer
, queue
);
312 pcdev
->active
= NULL
;
314 sh_mobile_ceu_capture(pcdev
);
316 vb
->state
= VIDEOBUF_DONE
;
317 do_gettimeofday(&vb
->ts
);
320 spin_unlock_irqrestore(&pcdev
->lock
, flags
);
325 /* Called with .video_lock held */
326 static int sh_mobile_ceu_add_device(struct soc_camera_device
*icd
)
328 struct soc_camera_host
*ici
= to_soc_camera_host(icd
->dev
.parent
);
329 struct sh_mobile_ceu_dev
*pcdev
= ici
->priv
;
336 "SuperH Mobile CEU driver attached to camera %d\n",
339 ret
= icd
->ops
->init(icd
);
343 clk_enable(pcdev
->clk
);
345 ceu_write(pcdev
, CAPSR
, 1 << 16); /* reset */
346 while (ceu_read(pcdev
, CSTSR
) & 1)
354 /* Called with .video_lock held */
355 static void sh_mobile_ceu_remove_device(struct soc_camera_device
*icd
)
357 struct soc_camera_host
*ici
= to_soc_camera_host(icd
->dev
.parent
);
358 struct sh_mobile_ceu_dev
*pcdev
= ici
->priv
;
361 BUG_ON(icd
!= pcdev
->icd
);
363 /* disable capture, disable interrupts */
364 ceu_write(pcdev
, CEIER
, 0);
365 ceu_write(pcdev
, CAPSR
, 1 << 16); /* reset */
367 /* make sure active buffer is canceled */
368 spin_lock_irqsave(&pcdev
->lock
, flags
);
370 list_del(&pcdev
->active
->queue
);
371 pcdev
->active
->state
= VIDEOBUF_ERROR
;
372 wake_up_all(&pcdev
->active
->done
);
373 pcdev
->active
= NULL
;
375 spin_unlock_irqrestore(&pcdev
->lock
, flags
);
377 clk_disable(pcdev
->clk
);
379 icd
->ops
->release(icd
);
382 "SuperH Mobile CEU driver detached from camera %d\n",
388 static int sh_mobile_ceu_set_bus_param(struct soc_camera_device
*icd
,
391 struct soc_camera_host
*ici
= to_soc_camera_host(icd
->dev
.parent
);
392 struct sh_mobile_ceu_dev
*pcdev
= ici
->priv
;
393 int ret
, buswidth
, width
, height
, cfszr_width
, cdwdr_width
;
394 unsigned long camera_flags
, common_flags
, value
;
395 int yuv_mode
, yuv_lineskip
;
397 camera_flags
= icd
->ops
->query_bus_param(icd
);
398 common_flags
= soc_camera_bus_param_compatible(camera_flags
,
399 pcdev
->pdata
->flags
);
403 ret
= icd
->ops
->set_bus_param(icd
, common_flags
);
407 switch (common_flags
& SOCAM_DATAWIDTH_MASK
) {
408 case SOCAM_DATAWIDTH_8
:
411 case SOCAM_DATAWIDTH_16
:
418 ceu_write(pcdev
, CRCNTR
, 0);
419 ceu_write(pcdev
, CRCMPR
, 0);
421 value
= 0x00000010; /* data fetch by default */
422 yuv_mode
= yuv_lineskip
= 0;
424 switch (icd
->current_fmt
->fourcc
) {
425 case V4L2_PIX_FMT_NV12
:
426 case V4L2_PIX_FMT_NV21
:
427 yuv_lineskip
= 1; /* skip for NV12/21, no skip for NV16/61 */
429 case V4L2_PIX_FMT_NV16
:
430 case V4L2_PIX_FMT_NV61
:
432 switch (pcdev
->camera_fmt
->fourcc
) {
433 case V4L2_PIX_FMT_UYVY
:
434 value
= 0x00000000; /* Cb0, Y0, Cr0, Y1 */
436 case V4L2_PIX_FMT_VYUY
:
437 value
= 0x00000100; /* Cr0, Y0, Cb0, Y1 */
439 case V4L2_PIX_FMT_YUYV
:
440 value
= 0x00000200; /* Y0, Cb0, Y1, Cr0 */
442 case V4L2_PIX_FMT_YVYU
:
443 value
= 0x00000300; /* Y0, Cr0, Y1, Cb0 */
450 if (icd
->current_fmt
->fourcc
== V4L2_PIX_FMT_NV21
||
451 icd
->current_fmt
->fourcc
== V4L2_PIX_FMT_NV61
)
452 value
^= 0x00000100; /* swap U, V to change from NV1x->NVx1 */
454 value
|= common_flags
& SOCAM_VSYNC_ACTIVE_LOW
? 1 << 1 : 0;
455 value
|= common_flags
& SOCAM_HSYNC_ACTIVE_LOW
? 1 << 0 : 0;
456 value
|= buswidth
== 16 ? 1 << 12 : 0;
457 ceu_write(pcdev
, CAMCR
, value
);
459 ceu_write(pcdev
, CAPCR
, 0x00300000);
460 ceu_write(pcdev
, CAIFR
, (pcdev
->is_interlace
) ? 0x101 : 0);
465 width
= icd
->width
* 2;
466 width
= buswidth
== 16 ? width
/ 2 : width
;
467 cfszr_width
= cdwdr_width
= icd
->width
;
469 width
= icd
->width
* ((icd
->current_fmt
->depth
+ 7) >> 3);
470 width
= buswidth
== 16 ? width
/ 2 : width
;
471 cfszr_width
= buswidth
== 8 ? width
/ 2 : width
;
472 cdwdr_width
= buswidth
== 16 ? width
* 2 : width
;
475 height
= icd
->height
;
476 if (pcdev
->is_interlace
) {
481 ceu_write(pcdev
, CAMOR
, 0);
482 ceu_write(pcdev
, CAPWR
, (height
<< 16) | width
);
483 ceu_write(pcdev
, CFLCR
, 0); /* no scaling */
484 ceu_write(pcdev
, CFSZR
, (height
<< 16) | cfszr_width
);
485 ceu_write(pcdev
, CLFCR
, 0); /* no lowpass filter */
487 /* A few words about byte order (observed in Big Endian mode)
489 * In data fetch mode bytes are received in chunks of 8 bytes.
490 * D0, D1, D2, D3, D4, D5, D6, D7 (D0 received first)
492 * The data is however by default written to memory in reverse order:
493 * D7, D6, D5, D4, D3, D2, D1, D0 (D7 written to lowest byte)
495 * The lowest three bits of CDOCR allows us to do swapping,
496 * using 7 we swap the data bytes to match the incoming order:
497 * D0, D1, D2, D3, D4, D5, D6, D7
501 value
&= ~0x00000010; /* convert 4:2:2 -> 4:2:0 */
503 ceu_write(pcdev
, CDOCR
, value
);
505 ceu_write(pcdev
, CDWDR
, cdwdr_width
);
506 ceu_write(pcdev
, CFWCR
, 0); /* keep "datafetch firewall" disabled */
508 /* not in bundle mode: skip CBDSR, CDAYR2, CDACR2, CDBYR2, CDBCR2 */
512 static int sh_mobile_ceu_try_bus_param(struct soc_camera_device
*icd
)
514 struct soc_camera_host
*ici
= to_soc_camera_host(icd
->dev
.parent
);
515 struct sh_mobile_ceu_dev
*pcdev
= ici
->priv
;
516 unsigned long camera_flags
, common_flags
;
518 camera_flags
= icd
->ops
->query_bus_param(icd
);
519 common_flags
= soc_camera_bus_param_compatible(camera_flags
,
520 pcdev
->pdata
->flags
);
527 static const struct soc_camera_data_format sh_mobile_ceu_formats
[] = {
531 .fourcc
= V4L2_PIX_FMT_NV12
,
532 .colorspace
= V4L2_COLORSPACE_JPEG
,
537 .fourcc
= V4L2_PIX_FMT_NV21
,
538 .colorspace
= V4L2_COLORSPACE_JPEG
,
543 .fourcc
= V4L2_PIX_FMT_NV16
,
544 .colorspace
= V4L2_COLORSPACE_JPEG
,
549 .fourcc
= V4L2_PIX_FMT_NV61
,
550 .colorspace
= V4L2_COLORSPACE_JPEG
,
554 static int sh_mobile_ceu_get_formats(struct soc_camera_device
*icd
, int idx
,
555 struct soc_camera_format_xlate
*xlate
)
557 struct soc_camera_host
*ici
= to_soc_camera_host(icd
->dev
.parent
);
561 ret
= sh_mobile_ceu_try_bus_param(icd
);
565 switch (icd
->formats
[idx
].fourcc
) {
566 case V4L2_PIX_FMT_UYVY
:
567 case V4L2_PIX_FMT_VYUY
:
568 case V4L2_PIX_FMT_YUYV
:
569 case V4L2_PIX_FMT_YVYU
:
570 n
= ARRAY_SIZE(sh_mobile_ceu_formats
);
572 for (k
= 0; xlate
&& k
< n
; k
++) {
573 xlate
->host_fmt
= &sh_mobile_ceu_formats
[k
];
574 xlate
->cam_fmt
= icd
->formats
+ idx
;
575 xlate
->buswidth
= icd
->formats
[idx
].depth
;
577 dev_dbg(&ici
->dev
, "Providing format %s using %s\n",
578 sh_mobile_ceu_formats
[k
].name
,
579 icd
->formats
[idx
].name
);
582 /* Generic pass-through */
585 xlate
->host_fmt
= icd
->formats
+ idx
;
586 xlate
->cam_fmt
= icd
->formats
+ idx
;
587 xlate
->buswidth
= icd
->formats
[idx
].depth
;
590 "Providing format %s in pass-through mode\n",
591 icd
->formats
[idx
].name
);
598 static int sh_mobile_ceu_set_fmt(struct soc_camera_device
*icd
,
599 __u32 pixfmt
, struct v4l2_rect
*rect
)
601 struct soc_camera_host
*ici
= to_soc_camera_host(icd
->dev
.parent
);
602 struct sh_mobile_ceu_dev
*pcdev
= ici
->priv
;
603 const struct soc_camera_format_xlate
*xlate
;
607 return icd
->ops
->set_fmt(icd
, pixfmt
, rect
);
609 xlate
= soc_camera_xlate_by_fourcc(icd
, pixfmt
);
611 dev_warn(&ici
->dev
, "Format %x not found\n", pixfmt
);
615 ret
= icd
->ops
->set_fmt(icd
, xlate
->cam_fmt
->fourcc
, rect
);
618 icd
->buswidth
= xlate
->buswidth
;
619 icd
->current_fmt
= xlate
->host_fmt
;
620 pcdev
->camera_fmt
= xlate
->cam_fmt
;
626 static int sh_mobile_ceu_try_fmt(struct soc_camera_device
*icd
,
627 struct v4l2_format
*f
)
629 struct soc_camera_host
*ici
= to_soc_camera_host(icd
->dev
.parent
);
630 struct sh_mobile_ceu_dev
*pcdev
= ici
->priv
;
631 const struct soc_camera_format_xlate
*xlate
;
632 __u32 pixfmt
= f
->fmt
.pix
.pixelformat
;
635 xlate
= soc_camera_xlate_by_fourcc(icd
, pixfmt
);
637 dev_warn(&ici
->dev
, "Format %x not found\n", pixfmt
);
641 /* FIXME: calculate using depth and bus width */
643 if (f
->fmt
.pix
.height
< 4)
644 f
->fmt
.pix
.height
= 4;
645 if (f
->fmt
.pix
.height
> 1920)
646 f
->fmt
.pix
.height
= 1920;
647 if (f
->fmt
.pix
.width
< 2)
648 f
->fmt
.pix
.width
= 2;
649 if (f
->fmt
.pix
.width
> 2560)
650 f
->fmt
.pix
.width
= 2560;
651 f
->fmt
.pix
.width
&= ~0x01;
652 f
->fmt
.pix
.height
&= ~0x03;
654 f
->fmt
.pix
.bytesperline
= f
->fmt
.pix
.width
*
655 DIV_ROUND_UP(xlate
->host_fmt
->depth
, 8);
656 f
->fmt
.pix
.sizeimage
= f
->fmt
.pix
.height
* f
->fmt
.pix
.bytesperline
;
658 /* limit to sensor capabilities */
659 ret
= icd
->ops
->try_fmt(icd
, f
);
663 switch (f
->fmt
.pix
.field
) {
664 case V4L2_FIELD_INTERLACED
:
665 pcdev
->is_interlace
= 1;
668 f
->fmt
.pix
.field
= V4L2_FIELD_NONE
;
670 case V4L2_FIELD_NONE
:
671 pcdev
->is_interlace
= 0;
681 static int sh_mobile_ceu_reqbufs(struct soc_camera_file
*icf
,
682 struct v4l2_requestbuffers
*p
)
686 /* This is for locking debugging only. I removed spinlocks and now I
687 * check whether .prepare is ever called on a linked buffer, or whether
688 * a dma IRQ can occur for an in-work or unlinked buffer. Until now
689 * it hadn't triggered */
690 for (i
= 0; i
< p
->count
; i
++) {
691 struct sh_mobile_ceu_buffer
*buf
;
693 buf
= container_of(icf
->vb_vidq
.bufs
[i
],
694 struct sh_mobile_ceu_buffer
, vb
);
695 INIT_LIST_HEAD(&buf
->vb
.queue
);
701 static unsigned int sh_mobile_ceu_poll(struct file
*file
, poll_table
*pt
)
703 struct soc_camera_file
*icf
= file
->private_data
;
704 struct sh_mobile_ceu_buffer
*buf
;
706 buf
= list_entry(icf
->vb_vidq
.stream
.next
,
707 struct sh_mobile_ceu_buffer
, vb
.stream
);
709 poll_wait(file
, &buf
->vb
.done
, pt
);
711 if (buf
->vb
.state
== VIDEOBUF_DONE
||
712 buf
->vb
.state
== VIDEOBUF_ERROR
)
713 return POLLIN
|POLLRDNORM
;
718 static int sh_mobile_ceu_querycap(struct soc_camera_host
*ici
,
719 struct v4l2_capability
*cap
)
721 strlcpy(cap
->card
, "SuperH_Mobile_CEU", sizeof(cap
->card
));
722 cap
->version
= KERNEL_VERSION(0, 0, 5);
723 cap
->capabilities
= V4L2_CAP_VIDEO_CAPTURE
| V4L2_CAP_STREAMING
;
727 static void sh_mobile_ceu_init_videobuf(struct videobuf_queue
*q
,
728 struct soc_camera_device
*icd
)
730 struct soc_camera_host
*ici
= to_soc_camera_host(icd
->dev
.parent
);
731 struct sh_mobile_ceu_dev
*pcdev
= ici
->priv
;
733 videobuf_queue_dma_contig_init(q
,
734 &sh_mobile_ceu_videobuf_ops
,
735 &ici
->dev
, &pcdev
->lock
,
736 V4L2_BUF_TYPE_VIDEO_CAPTURE
,
738 sizeof(struct sh_mobile_ceu_buffer
),
742 static struct soc_camera_host_ops sh_mobile_ceu_host_ops
= {
743 .owner
= THIS_MODULE
,
744 .add
= sh_mobile_ceu_add_device
,
745 .remove
= sh_mobile_ceu_remove_device
,
746 .get_formats
= sh_mobile_ceu_get_formats
,
747 .set_fmt
= sh_mobile_ceu_set_fmt
,
748 .try_fmt
= sh_mobile_ceu_try_fmt
,
749 .reqbufs
= sh_mobile_ceu_reqbufs
,
750 .poll
= sh_mobile_ceu_poll
,
751 .querycap
= sh_mobile_ceu_querycap
,
752 .set_bus_param
= sh_mobile_ceu_set_bus_param
,
753 .init_videobuf
= sh_mobile_ceu_init_videobuf
,
756 static int sh_mobile_ceu_probe(struct platform_device
*pdev
)
758 struct sh_mobile_ceu_dev
*pcdev
;
759 struct resource
*res
;
765 res
= platform_get_resource(pdev
, IORESOURCE_MEM
, 0);
766 irq
= platform_get_irq(pdev
, 0);
768 dev_err(&pdev
->dev
, "Not enough CEU platform resources.\n");
773 pcdev
= kzalloc(sizeof(*pcdev
), GFP_KERNEL
);
775 dev_err(&pdev
->dev
, "Could not allocate pcdev\n");
780 platform_set_drvdata(pdev
, pcdev
);
781 INIT_LIST_HEAD(&pcdev
->capture
);
782 spin_lock_init(&pcdev
->lock
);
784 pcdev
->pdata
= pdev
->dev
.platform_data
;
787 dev_err(&pdev
->dev
, "CEU platform data not set.\n");
791 base
= ioremap_nocache(res
->start
, res
->end
- res
->start
+ 1);
794 dev_err(&pdev
->dev
, "Unable to ioremap CEU registers.\n");
800 pcdev
->video_limit
= 0; /* only enabled if second resource exists */
801 pcdev
->dev
= &pdev
->dev
;
803 res
= platform_get_resource(pdev
, IORESOURCE_MEM
, 1);
805 err
= dma_declare_coherent_memory(&pdev
->dev
, res
->start
,
807 (res
->end
- res
->start
) + 1,
809 DMA_MEMORY_EXCLUSIVE
);
811 dev_err(&pdev
->dev
, "Unable to declare CEU memory.\n");
816 pcdev
->video_limit
= (res
->end
- res
->start
) + 1;
820 err
= request_irq(pcdev
->irq
, sh_mobile_ceu_irq
, IRQF_DISABLED
,
821 dev_name(&pdev
->dev
), pcdev
);
823 dev_err(&pdev
->dev
, "Unable to register CEU interrupt.\n");
824 goto exit_release_mem
;
827 snprintf(clk_name
, sizeof(clk_name
), "ceu%d", pdev
->id
);
828 pcdev
->clk
= clk_get(&pdev
->dev
, clk_name
);
829 if (IS_ERR(pcdev
->clk
)) {
830 dev_err(&pdev
->dev
, "cannot get clock \"%s\"\n", clk_name
);
831 err
= PTR_ERR(pcdev
->clk
);
835 pcdev
->ici
.priv
= pcdev
;
836 pcdev
->ici
.dev
.parent
= &pdev
->dev
;
837 pcdev
->ici
.nr
= pdev
->id
;
838 pcdev
->ici
.drv_name
= dev_name(&pdev
->dev
);
839 pcdev
->ici
.ops
= &sh_mobile_ceu_host_ops
;
841 err
= soc_camera_host_register(&pcdev
->ici
);
850 free_irq(pcdev
->irq
, pcdev
);
852 if (platform_get_resource(pdev
, IORESOURCE_MEM
, 1))
853 dma_release_declared_memory(&pdev
->dev
);
862 static int sh_mobile_ceu_remove(struct platform_device
*pdev
)
864 struct sh_mobile_ceu_dev
*pcdev
= platform_get_drvdata(pdev
);
866 soc_camera_host_unregister(&pcdev
->ici
);
868 free_irq(pcdev
->irq
, pcdev
);
869 if (platform_get_resource(pdev
, IORESOURCE_MEM
, 1))
870 dma_release_declared_memory(&pdev
->dev
);
871 iounmap(pcdev
->base
);
876 static struct platform_driver sh_mobile_ceu_driver
= {
878 .name
= "sh_mobile_ceu",
880 .probe
= sh_mobile_ceu_probe
,
881 .remove
= sh_mobile_ceu_remove
,
884 static int __init
sh_mobile_ceu_init(void)
886 return platform_driver_register(&sh_mobile_ceu_driver
);
889 static void __exit
sh_mobile_ceu_exit(void)
891 platform_driver_unregister(&sh_mobile_ceu_driver
);
894 module_init(sh_mobile_ceu_init
);
895 module_exit(sh_mobile_ceu_exit
);
897 MODULE_DESCRIPTION("SuperH Mobile CEU driver");
898 MODULE_AUTHOR("Magnus Damm");
899 MODULE_LICENSE("GPL");