[RFC v3 1/2] media: platform: soc-camera: Remove SH CEU driver

[Jacopo Mondi <jacopo@jmondi.org>]

Remove SH Mobile CEU driver from soc-camera framework

Signed-off-by: Jacopo Mondi <jacopo@jmondi.org>
---
 drivers/media/platform/soc_camera/Kconfig          |   10 -
 drivers/media/platform/soc_camera/Makefile         |    1 -
 .../platform/soc_camera/sh_mobile_ceu_camera.c     | 1821 --------------------
 3 files changed, 1832 deletions(-)
 delete mode 100644 drivers/media/platform/soc_camera/sh_mobile_ceu_camera.c

diff --git a/drivers/media/platform/soc_camera/Kconfig b/drivers/media/platform/soc_camera/Kconfig
index 86d7478..99ee15e 100644
--- a/drivers/media/platform/soc_camera/Kconfig
+++ b/drivers/media/platform/soc_camera/Kconfig
@@ -17,16 +17,6 @@ config SOC_CAMERA_PLATFORM
 	help
 	  This is a generic SoC camera platform driver, useful for testing
 
-config VIDEO_SH_MOBILE_CEU
-	tristate "SuperH Mobile CEU Interface driver"
-	depends on VIDEO_DEV && SOC_CAMERA && HAS_DMA && HAVE_CLK
-	depends on ARCH_SHMOBILE || COMPILE_TEST
-	depends on HAS_DMA
-	select VIDEOBUF2_DMA_CONTIG
-	select SOC_CAMERA_SCALE_CROP
-	---help---
-	  This is a v4l2 driver for the SuperH Mobile CEU Interface
-
 config VIDEO_ATMEL_ISI
 	tristate "ATMEL Image Sensor Interface (ISI) support"
 	depends on VIDEO_DEV && SOC_CAMERA
diff --git a/drivers/media/platform/soc_camera/Makefile b/drivers/media/platform/soc_camera/Makefile
index 7633a0f..7ecb22b 100644
--- a/drivers/media/platform/soc_camera/Makefile
+++ b/drivers/media/platform/soc_camera/Makefile
@@ -7,4 +7,3 @@ obj-$(CONFIG_SOC_CAMERA_PLATFORM)	+= soc_camera_platform.o
 
 # soc-camera host drivers have to be linked after camera drivers
 obj-$(CONFIG_VIDEO_ATMEL_ISI)		+= atmel-isi.o
-obj-$(CONFIG_VIDEO_SH_MOBILE_CEU)	+= sh_mobile_ceu_camera.o
diff --git a/drivers/media/platform/soc_camera/sh_mobile_ceu_camera.c b/drivers/media/platform/soc_camera/sh_mobile_ceu_camera.c
deleted file mode 100644
index a15bfb5..0000000
--- a/drivers/media/platform/soc_camera/sh_mobile_ceu_camera.c
+++ /dev/null
@@ -1,1821 +0,0 @@
-/*
- * V4L2 Driver for SuperH Mobile CEU interface
- *
- * Copyright (C) 2008 Magnus Damm
- *
- * Based on V4L2 Driver for PXA camera host - "pxa_camera.c",
- *
- * Copyright (C) 2006, Sascha Hauer, Pengutronix
- * Copyright (C) 2008, Guennadi Liakhovetski <kernel@pengutronix.de>
- *
- * This program is free software; you can redistribute it and/or modify
- * it under the terms of the GNU General Public License as published by
- * the Free Software Foundation; either version 2 of the License, or
- * (at your option) any later version.
- */
-
-#include <linux/init.h>
-#include <linux/module.h>
-#include <linux/io.h>
-#include <linux/completion.h>
-#include <linux/delay.h>
-#include <linux/dma-mapping.h>
-#include <linux/err.h>
-#include <linux/errno.h>
-#include <linux/fs.h>
-#include <linux/interrupt.h>
-#include <linux/kernel.h>
-#include <linux/mm.h>
-#include <linux/moduleparam.h>
-#include <linux/of.h>
-#include <linux/time.h>
-#include <linux/slab.h>
-#include <linux/device.h>
-#include <linux/platform_device.h>
-#include <linux/videodev2.h>
-#include <linux/pm_runtime.h>
-#include <linux/sched.h>
-
-#include <media/v4l2-async.h>
-#include <media/v4l2-common.h>
-#include <media/v4l2-dev.h>
-#include <media/soc_camera.h>
-#include <media/drv-intf/sh_mobile_ceu.h>
-#include <media/videobuf2-dma-contig.h>
-#include <media/v4l2-mediabus.h>
-#include <media/drv-intf/soc_mediabus.h>
-
-#include "soc_scale_crop.h"
-
-/* register offsets for sh7722 / sh7723 */
-
-#define CAPSR  0x00 /* Capture start register */
-#define CAPCR  0x04 /* Capture control register */
-#define CAMCR  0x08 /* Capture interface control register */
-#define CMCYR  0x0c /* Capture interface cycle  register */
-#define CAMOR  0x10 /* Capture interface offset register */
-#define CAPWR  0x14 /* Capture interface width register */
-#define CAIFR  0x18 /* Capture interface input format register */
-#define CSTCR  0x20 /* Camera strobe control register (<= sh7722) */
-#define CSECR  0x24 /* Camera strobe emission count register (<= sh7722) */
-#define CRCNTR 0x28 /* CEU register control register */
-#define CRCMPR 0x2c /* CEU register forcible control register */
-#define CFLCR  0x30 /* Capture filter control register */
-#define CFSZR  0x34 /* Capture filter size clip register */
-#define CDWDR  0x38 /* Capture destination width register */
-#define CDAYR  0x3c /* Capture data address Y register */
-#define CDACR  0x40 /* Capture data address C register */
-#define CDBYR  0x44 /* Capture data bottom-field address Y register */
-#define CDBCR  0x48 /* Capture data bottom-field address C register */
-#define CBDSR  0x4c /* Capture bundle destination size register */
-#define CFWCR  0x5c /* Firewall operation control register */
-#define CLFCR  0x60 /* Capture low-pass filter control register */
-#define CDOCR  0x64 /* Capture data output control register */
-#define CDDCR  0x68 /* Capture data complexity level register */
-#define CDDAR  0x6c /* Capture data complexity level address register */
-#define CEIER  0x70 /* Capture event interrupt enable register */
-#define CETCR  0x74 /* Capture event flag clear register */
-#define CSTSR  0x7c /* Capture status register */
-#define CSRTR  0x80 /* Capture software reset register */
-#define CDSSR  0x84 /* Capture data size register */
-#define CDAYR2 0x90 /* Capture data address Y register 2 */
-#define CDACR2 0x94 /* Capture data address C register 2 */
-#define CDBYR2 0x98 /* Capture data bottom-field address Y register 2 */
-#define CDBCR2 0x9c /* Capture data bottom-field address C register 2 */
-
-#undef DEBUG_GEOMETRY
-#ifdef DEBUG_GEOMETRY
-#define dev_geo	dev_info
-#else
-#define dev_geo	dev_dbg
-#endif
-
-/* per video frame buffer */
-struct sh_mobile_ceu_buffer {
-	struct vb2_v4l2_buffer vb; /* v4l buffer must be first */
-	struct list_head queue;
-};
-
-struct sh_mobile_ceu_dev {
-	struct soc_camera_host ici;
-
-	unsigned int irq;
-	void __iomem *base;
-	size_t video_limit;
-	size_t buf_total;
-
-	spinlock_t lock;		/* Protects video buffer lists */
-	struct list_head capture;
-	struct vb2_v4l2_buffer *active;
-
-	struct sh_mobile_ceu_info *pdata;
-	struct completion complete;
-
-	u32 cflcr;
-
-	/* static max sizes either from platform data or default */
-	int max_width;
-	int max_height;
-
-	enum v4l2_field field;
-	int sequence;
-	unsigned long flags;
-
-	unsigned int image_mode:1;
-	unsigned int is_16bit:1;
-	unsigned int frozen:1;
-};
-
-struct sh_mobile_ceu_cam {
-	/* CEU offsets within the camera output, before the CEU scaler */
-	unsigned int ceu_left;
-	unsigned int ceu_top;
-	/* Client output, as seen by the CEU */
-	unsigned int width;
-	unsigned int height;
-	/*
-	 * User window from S_SELECTION / G_SELECTION, produced by client cropping and
-	 * scaling, CEU scaling and CEU cropping, mapped back onto the client
-	 * input window
-	 */
-	struct v4l2_rect subrect;
-	/* Camera cropping rectangle */
-	struct v4l2_rect rect;
-	const struct soc_mbus_pixelfmt *extra_fmt;
-	u32 code;
-};
-
-static struct sh_mobile_ceu_buffer *to_ceu_vb(struct vb2_v4l2_buffer *vbuf)
-{
-	return container_of(vbuf, struct sh_mobile_ceu_buffer, vb);
-}
-
-static void ceu_write(struct sh_mobile_ceu_dev *priv,
-		      unsigned long reg_offs, u32 data)
-{
-	iowrite32(data, priv->base + reg_offs);
-}
-
-static u32 ceu_read(struct sh_mobile_ceu_dev *priv, unsigned long reg_offs)
-{
-	return ioread32(priv->base + reg_offs);
-}
-
-static int sh_mobile_ceu_soft_reset(struct sh_mobile_ceu_dev *pcdev)
-{
-	int i, success = 0;
-
-	ceu_write(pcdev, CAPSR, 1 << 16); /* reset */
-
-	/* wait CSTSR.CPTON bit */
-	for (i = 0; i < 1000; i++) {
-		if (!(ceu_read(pcdev, CSTSR) & 1)) {
-			success++;
-			break;
-		}
-		udelay(1);
-	}
-
-	/* wait CAPSR.CPKIL bit */
-	for (i = 0; i < 1000; i++) {
-		if (!(ceu_read(pcdev, CAPSR) & (1 << 16))) {
-			success++;
-			break;
-		}
-		udelay(1);
-	}
-
-	if (2 != success) {
-		dev_warn(pcdev->ici.v4l2_dev.dev, "soft reset time out\n");
-		return -EIO;
-	}
-
-	return 0;
-}
-
-/*
- *  Videobuf operations
- */
-
-/*
- * .queue_setup() is called to check, whether the driver can accept the
- *		  requested number of buffers and to fill in plane sizes
- *		  for the current frame format if required
- */
-static int sh_mobile_ceu_videobuf_setup(struct vb2_queue *vq,
-			unsigned int *count, unsigned int *num_planes,
-			unsigned int sizes[], struct device *alloc_devs[])
-{
-	struct soc_camera_device *icd = soc_camera_from_vb2q(vq);
-	struct soc_camera_host *ici = to_soc_camera_host(icd->parent);
-	struct sh_mobile_ceu_dev *pcdev = ici->priv;
-
-	if (!vq->num_buffers)
-		pcdev->sequence = 0;
-
-	if (!*count)
-		*count = 2;
-
-	/* Called from VIDIOC_REQBUFS or in compatibility mode */
-	if (!*num_planes)
-		sizes[0] = icd->sizeimage;
-	else if (sizes[0] < icd->sizeimage)
-		return -EINVAL;
-
-	/* If *num_planes != 0, we have already verified *count. */
-	if (pcdev->video_limit) {
-		size_t size = PAGE_ALIGN(sizes[0]) * *count;
-
-		if (size + pcdev->buf_total > pcdev->video_limit)
-			*count = (pcdev->video_limit - pcdev->buf_total) /
-				PAGE_ALIGN(sizes[0]);
-	}
-
-	*num_planes = 1;
-
-	dev_dbg(icd->parent, "count=%d, size=%u\n", *count, sizes[0]);
-
-	return 0;
-}
-
-#define CEU_CETCR_MAGIC 0x0317f313 /* acknowledge magical interrupt sources */
-#define CEU_CETCR_IGRW (1 << 4) /* prohibited register access interrupt bit */
-#define CEU_CEIER_CPEIE (1 << 0) /* one-frame capture end interrupt */
-#define CEU_CEIER_VBP   (1 << 20) /* vbp error */
-#define CEU_CAPCR_CTNCP (1 << 16) /* continuous capture mode (if set) */
-#define CEU_CEIER_MASK (CEU_CEIER_CPEIE | CEU_CEIER_VBP)
-
-
-/*
- * return value doesn't reflex the success/failure to queue the new buffer,
- * but rather the status of the previous buffer.
- */
-static int sh_mobile_ceu_capture(struct sh_mobile_ceu_dev *pcdev)
-{
-	struct soc_camera_device *icd = pcdev->ici.icd;
-	dma_addr_t phys_addr_top, phys_addr_bottom;
-	unsigned long top1, top2;
-	unsigned long bottom1, bottom2;
-	u32 status;
-	bool planar;
-	int ret = 0;
-
-	/*
-	 * The hardware is _very_ picky about this sequence. Especially
-	 * the CEU_CETCR_MAGIC value. It seems like we need to acknowledge
-	 * several not-so-well documented interrupt sources in CETCR.
-	 */
-	ceu_write(pcdev, CEIER, ceu_read(pcdev, CEIER) & ~CEU_CEIER_MASK);
-	status = ceu_read(pcdev, CETCR);
-	ceu_write(pcdev, CETCR, ~status & CEU_CETCR_MAGIC);
-	if (!pcdev->frozen)
-		ceu_write(pcdev, CEIER, ceu_read(pcdev, CEIER) | CEU_CEIER_MASK);
-	ceu_write(pcdev, CAPCR, ceu_read(pcdev, CAPCR) & ~CEU_CAPCR_CTNCP);
-	ceu_write(pcdev, CETCR, CEU_CETCR_MAGIC ^ CEU_CETCR_IGRW);
-
-	/*
-	 * When a VBP interrupt occurs, a capture end interrupt does not occur
-	 * and the image of that frame is not captured correctly. So, soft reset
-	 * is needed here.
-	 */
-	if (status & CEU_CEIER_VBP) {
-		sh_mobile_ceu_soft_reset(pcdev);
-		ret = -EIO;
-	}
-
-	if (pcdev->frozen) {
-		complete(&pcdev->complete);
-		return ret;
-	}
-
-	if (!pcdev->active)
-		return ret;
-
-	if (V4L2_FIELD_INTERLACED_BT == pcdev->field) {
-		top1	= CDBYR;
-		top2	= CDBCR;
-		bottom1	= CDAYR;
-		bottom2	= CDACR;
-	} else {
-		top1	= CDAYR;
-		top2	= CDACR;
-		bottom1	= CDBYR;
-		bottom2	= CDBCR;
-	}
-
-	phys_addr_top =
-		vb2_dma_contig_plane_dma_addr(&pcdev->active->vb2_buf, 0);
-
-	switch (icd->current_fmt->host_fmt->fourcc) {
-	case V4L2_PIX_FMT_NV12:
-	case V4L2_PIX_FMT_NV21:
-	case V4L2_PIX_FMT_NV16:
-	case V4L2_PIX_FMT_NV61:
-		planar = true;
-		break;
-	default:
-		planar = false;
-	}
-
-	ceu_write(pcdev, top1, phys_addr_top);
-	if (V4L2_FIELD_NONE != pcdev->field) {
-		phys_addr_bottom = phys_addr_top + icd->bytesperline;
-		ceu_write(pcdev, bottom1, phys_addr_bottom);
-	}
-
-	if (planar) {
-		phys_addr_top += icd->bytesperline * icd->user_height;
-		ceu_write(pcdev, top2, phys_addr_top);
-		if (V4L2_FIELD_NONE != pcdev->field) {
-			phys_addr_bottom = phys_addr_top + icd->bytesperline;
-			ceu_write(pcdev, bottom2, phys_addr_bottom);
-		}
-	}
-
-	ceu_write(pcdev, CAPSR, 0x1); /* start capture */
-
-	return ret;
-}
-
-static int sh_mobile_ceu_videobuf_prepare(struct vb2_buffer *vb)
-{
-	struct vb2_v4l2_buffer *vbuf = to_vb2_v4l2_buffer(vb);
-	struct sh_mobile_ceu_buffer *buf = to_ceu_vb(vbuf);
-
-	/* Added list head initialization on alloc */
-	WARN(!list_empty(&buf->queue), "Buffer %p on queue!\n", vb);
-
-	return 0;
-}
-
-static void sh_mobile_ceu_videobuf_queue(struct vb2_buffer *vb)
-{
-	struct vb2_v4l2_buffer *vbuf = to_vb2_v4l2_buffer(vb);
-	struct soc_camera_device *icd = soc_camera_from_vb2q(vb->vb2_queue);
-	struct soc_camera_host *ici = to_soc_camera_host(icd->parent);
-	struct sh_mobile_ceu_dev *pcdev = ici->priv;
-	struct sh_mobile_ceu_buffer *buf = to_ceu_vb(vbuf);
-	unsigned long size;
-
-	size = icd->sizeimage;
-
-	if (vb2_plane_size(vb, 0) < size) {
-		dev_err(icd->parent, "Buffer #%d too small (%lu < %lu)\n",
-			vb->index, vb2_plane_size(vb, 0), size);
-		goto error;
-	}
-
-	vb2_set_plane_payload(vb, 0, size);
-
-	dev_dbg(icd->parent, "%s (vb=0x%p) 0x%p %lu\n", __func__,
-		vb, vb2_plane_vaddr(vb, 0), vb2_get_plane_payload(vb, 0));
-
-#ifdef DEBUG
-	/*
-	 * This can be useful if you want to see if we actually fill
-	 * the buffer with something
-	 */
-	if (vb2_plane_vaddr(vb, 0))
-		memset(vb2_plane_vaddr(vb, 0), 0xaa, vb2_get_plane_payload(vb, 0));
-#endif
-
-	spin_lock_irq(&pcdev->lock);
-	list_add_tail(&buf->queue, &pcdev->capture);
-
-	if (!pcdev->active) {
-		/*
-		 * Because there were no active buffer at this moment,
-		 * we are not interested in the return value of
-		 * sh_mobile_ceu_capture here.
-		 */
-		pcdev->active = vbuf;
-		sh_mobile_ceu_capture(pcdev);
-	}
-	spin_unlock_irq(&pcdev->lock);
-
-	return;
-
-error:
-	vb2_buffer_done(vb, VB2_BUF_STATE_ERROR);
-}
-
-static void sh_mobile_ceu_videobuf_release(struct vb2_buffer *vb)
-{
-	struct vb2_v4l2_buffer *vbuf = to_vb2_v4l2_buffer(vb);
-	struct soc_camera_device *icd = soc_camera_from_vb2q(vb->vb2_queue);
-	struct soc_camera_host *ici = to_soc_camera_host(icd->parent);
-	struct sh_mobile_ceu_buffer *buf = to_ceu_vb(vbuf);
-	struct sh_mobile_ceu_dev *pcdev = ici->priv;
-
-	spin_lock_irq(&pcdev->lock);
-
-	if (pcdev->active == vbuf) {
-		/* disable capture (release DMA buffer), reset */
-		ceu_write(pcdev, CAPSR, 1 << 16);
-		pcdev->active = NULL;
-	}
-
-	/*
-	 * Doesn't hurt also if the list is empty, but it hurts, if queuing the
-	 * buffer failed, and .buf_init() hasn't been called
-	 */
-	if (buf->queue.next)
-		list_del_init(&buf->queue);
-
-	pcdev->buf_total -= PAGE_ALIGN(vb2_plane_size(vb, 0));
-	dev_dbg(icd->parent, "%s() %zu bytes buffers\n", __func__,
-		pcdev->buf_total);
-
-	spin_unlock_irq(&pcdev->lock);
-}
-
-static int sh_mobile_ceu_videobuf_init(struct vb2_buffer *vb)
-{
-	struct vb2_v4l2_buffer *vbuf = to_vb2_v4l2_buffer(vb);
-	struct soc_camera_device *icd = soc_camera_from_vb2q(vb->vb2_queue);
-	struct soc_camera_host *ici = to_soc_camera_host(icd->parent);
-	struct sh_mobile_ceu_dev *pcdev = ici->priv;
-
-	pcdev->buf_total += PAGE_ALIGN(vb2_plane_size(vb, 0));
-	dev_dbg(icd->parent, "%s() %zu bytes buffers\n", __func__,
-		pcdev->buf_total);
-
-	/* This is for locking debugging only */
-	INIT_LIST_HEAD(&to_ceu_vb(vbuf)->queue);
-	return 0;
-}
-
-static void sh_mobile_ceu_stop_streaming(struct vb2_queue *q)
-{
-	struct soc_camera_device *icd = soc_camera_from_vb2q(q);
-	struct soc_camera_host *ici = to_soc_camera_host(icd->parent);
-	struct sh_mobile_ceu_dev *pcdev = ici->priv;
-	struct list_head *buf_head, *tmp;
-
-	spin_lock_irq(&pcdev->lock);
-
-	pcdev->active = NULL;
-
-	list_for_each_safe(buf_head, tmp, &pcdev->capture)
-		list_del_init(buf_head);
-
-	spin_unlock_irq(&pcdev->lock);
-
-	sh_mobile_ceu_soft_reset(pcdev);
-}
-
-static const struct vb2_ops sh_mobile_ceu_videobuf_ops = {
-	.queue_setup	= sh_mobile_ceu_videobuf_setup,
-	.buf_prepare	= sh_mobile_ceu_videobuf_prepare,
-	.buf_queue	= sh_mobile_ceu_videobuf_queue,
-	.buf_cleanup	= sh_mobile_ceu_videobuf_release,
-	.buf_init	= sh_mobile_ceu_videobuf_init,
-	.wait_prepare	= vb2_ops_wait_prepare,
-	.wait_finish	= vb2_ops_wait_finish,
-	.stop_streaming	= sh_mobile_ceu_stop_streaming,
-};
-
-static irqreturn_t sh_mobile_ceu_irq(int irq, void *data)
-{
-	struct sh_mobile_ceu_dev *pcdev = data;
-	struct vb2_v4l2_buffer *vbuf;
-	int ret;
-
-	spin_lock(&pcdev->lock);
-
-	vbuf = pcdev->active;
-	if (!vbuf)
-		/* Stale interrupt from a released buffer */
-		goto out;
-
-	list_del_init(&to_ceu_vb(vbuf)->queue);
-
-	if (!list_empty(&pcdev->capture))
-		pcdev->active = &list_entry(pcdev->capture.next,
-					    struct sh_mobile_ceu_buffer, queue)->vb;
-	else
-		pcdev->active = NULL;
-
-	ret = sh_mobile_ceu_capture(pcdev);
-	vbuf->vb2_buf.timestamp = ktime_get_ns();
-	if (!ret) {
-		vbuf->field = pcdev->field;
-		vbuf->sequence = pcdev->sequence++;
-	}
-	vb2_buffer_done(&vbuf->vb2_buf,
-			ret < 0 ? VB2_BUF_STATE_ERROR : VB2_BUF_STATE_DONE);
-
-out:
-	spin_unlock(&pcdev->lock);
-
-	return IRQ_HANDLED;
-}
-
-static int sh_mobile_ceu_add_device(struct soc_camera_device *icd)
-{
-	dev_info(icd->parent,
-		 "SuperH Mobile CEU driver attached to camera %d\n",
-		 icd->devnum);
-
-	return 0;
-}
-
-static void sh_mobile_ceu_remove_device(struct soc_camera_device *icd)
-{
-	dev_info(icd->parent,
-		 "SuperH Mobile CEU driver detached from camera %d\n",
-		 icd->devnum);
-}
-
-/* Called with .host_lock held */
-static int sh_mobile_ceu_clock_start(struct soc_camera_host *ici)
-{
-	struct sh_mobile_ceu_dev *pcdev = ici->priv;
-
-	pm_runtime_get_sync(ici->v4l2_dev.dev);
-
-	pcdev->buf_total = 0;
-
-	sh_mobile_ceu_soft_reset(pcdev);
-
-	return 0;
-}
-
-/* Called with .host_lock held */
-static void sh_mobile_ceu_clock_stop(struct soc_camera_host *ici)
-{
-	struct sh_mobile_ceu_dev *pcdev = ici->priv;
-
-	/* disable capture, disable interrupts */
-	ceu_write(pcdev, CEIER, 0);
-	sh_mobile_ceu_soft_reset(pcdev);
-
-	/* make sure active buffer is canceled */
-	spin_lock_irq(&pcdev->lock);
-	if (pcdev->active) {
-		list_del_init(&to_ceu_vb(pcdev->active)->queue);
-		vb2_buffer_done(&pcdev->active->vb2_buf, VB2_BUF_STATE_ERROR);
-		pcdev->active = NULL;
-	}
-	spin_unlock_irq(&pcdev->lock);
-
-	pm_runtime_put(ici->v4l2_dev.dev);
-}
-
-/*
- * See chapter 29.4.12 "Capture Filter Control Register (CFLCR)"
- * in SH7722 Hardware Manual
- */
-static unsigned int size_dst(unsigned int src, unsigned int scale)
-{
-	unsigned int mant_pre = scale >> 12;
-	if (!src || !scale)
-		return src;
-	return ((mant_pre + 2 * (src - 1)) / (2 * mant_pre) - 1) *
-		mant_pre * 4096 / scale + 1;
-}
-
-static u16 calc_scale(unsigned int src, unsigned int *dst)
-{
-	u16 scale;
-
-	if (src == *dst)
-		return 0;
-
-	scale = (src * 4096 / *dst) & ~7;
-
-	while (scale > 4096 && size_dst(src, scale) < *dst)
-		scale -= 8;
-
-	*dst = size_dst(src, scale);
-
-	return scale;
-}
-
-/* rect is guaranteed to not exceed the scaled camera rectangle */
-static void sh_mobile_ceu_set_rect(struct soc_camera_device *icd)
-{
-	struct soc_camera_host *ici = to_soc_camera_host(icd->parent);
-	struct sh_mobile_ceu_cam *cam = icd->host_priv;
-	struct sh_mobile_ceu_dev *pcdev = ici->priv;
-	unsigned int height, width, cdwdr_width, in_width, in_height;
-	unsigned int left_offset, top_offset;
-	u32 camor;
-
-	dev_geo(icd->parent, "Crop %ux%u@%u:%u\n",
-		icd->user_width, icd->user_height, cam->ceu_left, cam->ceu_top);
-
-	left_offset	= cam->ceu_left;
-	top_offset	= cam->ceu_top;
-
-	WARN_ON(icd->user_width & 3 || icd->user_height & 3);
-
-	width = icd->user_width;
-
-	if (pcdev->image_mode) {
-		in_width = cam->width;
-		if (!pcdev->is_16bit) {
-			in_width *= 2;
-			left_offset *= 2;
-		}
-	} else {
-		unsigned int w_factor;
-
-		switch (icd->current_fmt->host_fmt->packing) {
-		case SOC_MBUS_PACKING_2X8_PADHI:
-			w_factor = 2;
-			break;
-		default:
-			w_factor = 1;
-		}
-
-		in_width = cam->width * w_factor;
-		left_offset *= w_factor;
-	}
-
-	cdwdr_width = icd->bytesperline;
-
-	height = icd->user_height;
-	in_height = cam->height;
-	if (V4L2_FIELD_NONE != pcdev->field) {
-		height = (height / 2) & ~3;
-		in_height /= 2;
-		top_offset /= 2;
-		cdwdr_width *= 2;
-	}
-
-	/* Set CAMOR, CAPWR, CFSZR, take care of CDWDR */
-	camor = left_offset | (top_offset << 16);
-
-	dev_geo(icd->parent,
-		"CAMOR 0x%x, CAPWR 0x%x, CFSZR 0x%x, CDWDR 0x%x\n", camor,
-		(in_height << 16) | in_width, (height << 16) | width,
-		cdwdr_width);
-
-	ceu_write(pcdev, CAMOR, camor);
-	ceu_write(pcdev, CAPWR, (in_height << 16) | in_width);
-	/* CFSZR clipping is applied _after_ the scaling filter (CFLCR) */
-	ceu_write(pcdev, CFSZR, (height << 16) | width);
-	ceu_write(pcdev, CDWDR, cdwdr_width);
-}
-
-static u32 capture_save_reset(struct sh_mobile_ceu_dev *pcdev)
-{
-	u32 capsr = ceu_read(pcdev, CAPSR);
-	ceu_write(pcdev, CAPSR, 1 << 16); /* reset, stop capture */
-	return capsr;
-}
-
-static void capture_restore(struct sh_mobile_ceu_dev *pcdev, u32 capsr)
-{
-	unsigned long timeout = jiffies + 10 * HZ;
-
-	/*
-	 * Wait until the end of the current frame. It can take a long time,
-	 * but if it has been aborted by a CAPSR reset, it shoule exit sooner.
-	 */
-	while ((ceu_read(pcdev, CSTSR) & 1) && time_before(jiffies, timeout))
-		msleep(1);
-
-	if (time_after(jiffies, timeout)) {
-		dev_err(pcdev->ici.v4l2_dev.dev,
-			"Timeout waiting for frame end! Interface problem?\n");
-		return;
-	}
-
-	/* Wait until reset clears, this shall not hang... */
-	while (ceu_read(pcdev, CAPSR) & (1 << 16))
-		udelay(10);
-
-	/* Anything to restore? */
-	if (capsr & ~(1 << 16))
-		ceu_write(pcdev, CAPSR, capsr);
-}
-
-#define CEU_BUS_FLAGS (V4L2_MBUS_MASTER |	\
-		V4L2_MBUS_PCLK_SAMPLE_RISING |	\
-		V4L2_MBUS_HSYNC_ACTIVE_HIGH |	\
-		V4L2_MBUS_HSYNC_ACTIVE_LOW |	\
-		V4L2_MBUS_VSYNC_ACTIVE_HIGH |	\
-		V4L2_MBUS_VSYNC_ACTIVE_LOW |	\
-		V4L2_MBUS_DATA_ACTIVE_HIGH)
-
-/* Capture is not running, no interrupts, no locking needed */
-static int sh_mobile_ceu_set_bus_param(struct soc_camera_device *icd)
-{
-	struct soc_camera_host *ici = to_soc_camera_host(icd->parent);
-	struct sh_mobile_ceu_dev *pcdev = ici->priv;
-	struct v4l2_subdev *sd = soc_camera_to_subdev(icd);
-	struct sh_mobile_ceu_cam *cam = icd->host_priv;
-	struct v4l2_mbus_config cfg = {.type = V4L2_MBUS_PARALLEL,};
-	unsigned long value, common_flags = CEU_BUS_FLAGS;
-	u32 capsr = capture_save_reset(pcdev);
-	unsigned int yuv_lineskip;
-	int ret;
-
-	/*
-	 * If the client doesn't implement g_mbus_config, we just use our
-	 * platform data
-	 */
-	ret = v4l2_subdev_call(sd, video, g_mbus_config, &cfg);
-	if (!ret) {
-		common_flags = soc_mbus_config_compatible(&cfg,
-							  common_flags);
-		if (!common_flags)
-			return -EINVAL;
-	} else if (ret != -ENOIOCTLCMD) {
-		return ret;
-	}
-
-	/* Make choises, based on platform preferences */
-	if ((common_flags & V4L2_MBUS_HSYNC_ACTIVE_HIGH) &&
-	    (common_flags & V4L2_MBUS_HSYNC_ACTIVE_LOW)) {
-		if (pcdev->flags & SH_CEU_FLAG_HSYNC_LOW)
-			common_flags &= ~V4L2_MBUS_HSYNC_ACTIVE_HIGH;
-		else
-			common_flags &= ~V4L2_MBUS_HSYNC_ACTIVE_LOW;
-	}
-
-	if ((common_flags & V4L2_MBUS_VSYNC_ACTIVE_HIGH) &&
-	    (common_flags & V4L2_MBUS_VSYNC_ACTIVE_LOW)) {
-		if (pcdev->flags & SH_CEU_FLAG_VSYNC_LOW)
-			common_flags &= ~V4L2_MBUS_VSYNC_ACTIVE_HIGH;
-		else
-			common_flags &= ~V4L2_MBUS_VSYNC_ACTIVE_LOW;
-	}
-
-	cfg.flags = common_flags;
-	ret = v4l2_subdev_call(sd, video, s_mbus_config, &cfg);
-	if (ret < 0 && ret != -ENOIOCTLCMD)
-		return ret;
-
-	if (icd->current_fmt->host_fmt->bits_per_sample > 8)
-		pcdev->is_16bit = 1;
-	else
-		pcdev->is_16bit = 0;
-
-	ceu_write(pcdev, CRCNTR, 0);
-	ceu_write(pcdev, CRCMPR, 0);
-
-	value = 0x00000010; /* data fetch by default */
-	yuv_lineskip = 0x10;
-
-	switch (icd->current_fmt->host_fmt->fourcc) {
-	case V4L2_PIX_FMT_NV12:
-	case V4L2_PIX_FMT_NV21:
-		/* convert 4:2:2 -> 4:2:0 */
-		yuv_lineskip = 0; /* skip for NV12/21, no skip for NV16/61 */
-		/* fall-through */
-	case V4L2_PIX_FMT_NV16:
-	case V4L2_PIX_FMT_NV61:
-		switch (cam->code) {
-		case MEDIA_BUS_FMT_UYVY8_2X8:
-			value = 0x00000000; /* Cb0, Y0, Cr0, Y1 */
-			break;
-		case MEDIA_BUS_FMT_VYUY8_2X8:
-			value = 0x00000100; /* Cr0, Y0, Cb0, Y1 */
-			break;
-		case MEDIA_BUS_FMT_YUYV8_2X8:
-			value = 0x00000200; /* Y0, Cb0, Y1, Cr0 */
-			break;
-		case MEDIA_BUS_FMT_YVYU8_2X8:
-			value = 0x00000300; /* Y0, Cr0, Y1, Cb0 */
-			break;
-		default:
-			BUG();
-		}
-	}
-
-	if (icd->current_fmt->host_fmt->fourcc == V4L2_PIX_FMT_NV21 ||
-	    icd->current_fmt->host_fmt->fourcc == V4L2_PIX_FMT_NV61)
-		value ^= 0x00000100; /* swap U, V to change from NV1x->NVx1 */
-
-	value |= common_flags & V4L2_MBUS_VSYNC_ACTIVE_LOW ? 1 << 1 : 0;
-	value |= common_flags & V4L2_MBUS_HSYNC_ACTIVE_LOW ? 1 << 0 : 0;
-
-	if (pcdev->is_16bit)
-		value |= 1 << 12;
-	else if (pcdev->flags & SH_CEU_FLAG_LOWER_8BIT)
-		value |= 2 << 12;
-
-	ceu_write(pcdev, CAMCR, value);
-
-	ceu_write(pcdev, CAPCR, 0x00300000);
-
-	switch (pcdev->field) {
-	case V4L2_FIELD_INTERLACED_TB:
-		value = 0x101;
-		break;
-	case V4L2_FIELD_INTERLACED_BT:
-		value = 0x102;
-		break;
-	default:
-		value = 0;
-		break;
-	}
-	ceu_write(pcdev, CAIFR, value);
-
-	sh_mobile_ceu_set_rect(icd);
-	mdelay(1);
-
-	dev_geo(icd->parent, "CFLCR 0x%x\n", pcdev->cflcr);
-	ceu_write(pcdev, CFLCR, pcdev->cflcr);
-
-	/*
-	 * A few words about byte order (observed in Big Endian mode)
-	 *
-	 * In data fetch mode bytes are received in chunks of 8 bytes.
-	 * D0, D1, D2, D3, D4, D5, D6, D7 (D0 received first)
-	 *
-	 * The data is however by default written to memory in reverse order:
-	 * D7, D6, D5, D4, D3, D2, D1, D0 (D7 written to lowest byte)
-	 *
-	 * The lowest three bits of CDOCR allows us to do swapping,
-	 * using 7 we swap the data bytes to match the incoming order:
-	 * D0, D1, D2, D3, D4, D5, D6, D7
-	 */
-	value = 0x00000007 | yuv_lineskip;
-
-	ceu_write(pcdev, CDOCR, value);
-	ceu_write(pcdev, CFWCR, 0); /* keep "datafetch firewall" disabled */
-
-	capture_restore(pcdev, capsr);
-
-	/* not in bundle mode: skip CBDSR, CDAYR2, CDACR2, CDBYR2, CDBCR2 */
-	return 0;
-}
-
-static int sh_mobile_ceu_try_bus_param(struct soc_camera_device *icd,
-				       unsigned char buswidth)
-{
-	struct v4l2_subdev *sd = soc_camera_to_subdev(icd);
-	unsigned long common_flags = CEU_BUS_FLAGS;
-	struct v4l2_mbus_config cfg = {.type = V4L2_MBUS_PARALLEL,};
-	int ret;
-
-	ret = v4l2_subdev_call(sd, video, g_mbus_config, &cfg);
-	if (!ret)
-		common_flags = soc_mbus_config_compatible(&cfg,
-							  common_flags);
-	else if (ret != -ENOIOCTLCMD)
-		return ret;
-
-	if (!common_flags || buswidth > 16)
-		return -EINVAL;
-
-	return 0;
-}
-
-static const struct soc_mbus_pixelfmt sh_mobile_ceu_formats[] = {
-	{
-		.fourcc			= V4L2_PIX_FMT_NV12,
-		.name			= "NV12",
-		.bits_per_sample	= 8,
-		.packing		= SOC_MBUS_PACKING_1_5X8,
-		.order			= SOC_MBUS_ORDER_LE,
-		.layout			= SOC_MBUS_LAYOUT_PLANAR_2Y_C,
-	}, {
-		.fourcc			= V4L2_PIX_FMT_NV21,
-		.name			= "NV21",
-		.bits_per_sample	= 8,
-		.packing		= SOC_MBUS_PACKING_1_5X8,
-		.order			= SOC_MBUS_ORDER_LE,
-		.layout			= SOC_MBUS_LAYOUT_PLANAR_2Y_C,
-	}, {
-		.fourcc			= V4L2_PIX_FMT_NV16,
-		.name			= "NV16",
-		.bits_per_sample	= 8,
-		.packing		= SOC_MBUS_PACKING_2X8_PADHI,
-		.order			= SOC_MBUS_ORDER_LE,
-		.layout			= SOC_MBUS_LAYOUT_PLANAR_Y_C,
-	}, {
-		.fourcc			= V4L2_PIX_FMT_NV61,
-		.name			= "NV61",
-		.bits_per_sample	= 8,
-		.packing		= SOC_MBUS_PACKING_2X8_PADHI,
-		.order			= SOC_MBUS_ORDER_LE,
-		.layout			= SOC_MBUS_LAYOUT_PLANAR_Y_C,
-	},
-};
-
-/* This will be corrected as we get more formats */
-static bool sh_mobile_ceu_packing_supported(const struct soc_mbus_pixelfmt *fmt)
-{
-	return	fmt->packing == SOC_MBUS_PACKING_NONE ||
-		(fmt->bits_per_sample == 8 &&
-		 fmt->packing == SOC_MBUS_PACKING_1_5X8) ||
-		(fmt->bits_per_sample == 8 &&
-		 fmt->packing == SOC_MBUS_PACKING_2X8_PADHI) ||
-		(fmt->bits_per_sample > 8 &&
-		 fmt->packing == SOC_MBUS_PACKING_EXTEND16);
-}
-
-static struct soc_camera_device *ctrl_to_icd(struct v4l2_ctrl *ctrl)
-{
-	return container_of(ctrl->handler, struct soc_camera_device,
-							ctrl_handler);
-}
-
-static int sh_mobile_ceu_s_ctrl(struct v4l2_ctrl *ctrl)
-{
-	struct soc_camera_device *icd = ctrl_to_icd(ctrl);
-	struct soc_camera_host *ici = to_soc_camera_host(icd->parent);
-	struct sh_mobile_ceu_dev *pcdev = ici->priv;
-
-	switch (ctrl->id) {
-	case V4L2_CID_SHARPNESS:
-		switch (icd->current_fmt->host_fmt->fourcc) {
-		case V4L2_PIX_FMT_NV12:
-		case V4L2_PIX_FMT_NV21:
-		case V4L2_PIX_FMT_NV16:
-		case V4L2_PIX_FMT_NV61:
-			ceu_write(pcdev, CLFCR, !ctrl->val);
-			return 0;
-		}
-		break;
-	}
-
-	return -EINVAL;
-}
-
-static const struct v4l2_ctrl_ops sh_mobile_ceu_ctrl_ops = {
-	.s_ctrl = sh_mobile_ceu_s_ctrl,
-};
-
-static int sh_mobile_ceu_get_formats(struct soc_camera_device *icd, unsigned int idx,
-				     struct soc_camera_format_xlate *xlate)
-{
-	struct v4l2_subdev *sd = soc_camera_to_subdev(icd);
-	struct device *dev = icd->parent;
-	struct soc_camera_host *ici = to_soc_camera_host(dev);
-	struct sh_mobile_ceu_dev *pcdev = ici->priv;
-	int ret, k, n;
-	int formats = 0;
-	struct sh_mobile_ceu_cam *cam;
-	struct v4l2_subdev_mbus_code_enum code = {
-		.which = V4L2_SUBDEV_FORMAT_ACTIVE,
-		.index = idx,
-	};
-	const struct soc_mbus_pixelfmt *fmt;
-
-	ret = v4l2_subdev_call(sd, pad, enum_mbus_code, NULL, &code);
-	if (ret < 0)
-		/* No more formats */
-		return 0;
-
-	fmt = soc_mbus_get_fmtdesc(code.code);
-	if (!fmt) {
-		dev_warn(dev, "unsupported format code #%u: %d\n", idx, code.code);
-		return 0;
-	}
-
-	ret = sh_mobile_ceu_try_bus_param(icd, fmt->bits_per_sample);
-	if (ret < 0)
-		return 0;
-
-	if (!icd->host_priv) {
-		struct v4l2_subdev_format fmt = {
-			.which = V4L2_SUBDEV_FORMAT_ACTIVE,
-		};
-		struct v4l2_mbus_framefmt *mf = &fmt.format;
-		struct v4l2_rect rect;
-		int shift = 0;
-
-		/* Add our control */
-		v4l2_ctrl_new_std(&icd->ctrl_handler, &sh_mobile_ceu_ctrl_ops,
-				  V4L2_CID_SHARPNESS, 0, 1, 1, 1);
-		if (icd->ctrl_handler.error)
-			return icd->ctrl_handler.error;
-
-		/* FIXME: subwindow is lost between close / open */
-
-		/* Cache current client geometry */
-		ret = soc_camera_client_g_rect(sd, &rect);
-		if (ret < 0)
-			return ret;
-
-		/* First time */
-		ret = v4l2_subdev_call(sd, pad, get_fmt, NULL, &fmt);
-		if (ret < 0)
-			return ret;
-
-		/*
-		 * All currently existing CEU implementations support 2560x1920
-		 * or larger frames. If the sensor is proposing too big a frame,
-		 * don't bother with possibly supportred by the CEU larger
-		 * sizes, just try VGA multiples. If needed, this can be
-		 * adjusted in the future.
-		 */
-		while ((mf->width > pcdev->max_width ||
-			mf->height > pcdev->max_height) && shift < 4) {
-			/* Try 2560x1920, 1280x960, 640x480, 320x240 */
-			mf->width	= 2560 >> shift;
-			mf->height	= 1920 >> shift;
-			ret = v4l2_device_call_until_err(sd->v4l2_dev,
-					soc_camera_grp_id(icd), pad,
-					set_fmt, NULL, &fmt);
-			if (ret < 0)
-				return ret;
-			shift++;
-		}
-
-		if (shift == 4) {
-			dev_err(dev, "Failed to configure the client below %ux%x\n",
-				mf->width, mf->height);
-			return -EIO;
-		}
-
-		dev_geo(dev, "camera fmt %ux%u\n", mf->width, mf->height);
-
-		cam = kzalloc(sizeof(*cam), GFP_KERNEL);
-		if (!cam)
-			return -ENOMEM;
-
-		/* We are called with current camera crop, initialise subrect with it */
-		cam->rect	= rect;
-		cam->subrect	= rect;
-
-		cam->width	= mf->width;
-		cam->height	= mf->height;
-
-		icd->host_priv = cam;
-	} else {
-		cam = icd->host_priv;
-	}
-
-	/* Beginning of a pass */
-	if (!idx)
-		cam->extra_fmt = NULL;
-
-	switch (code.code) {
-	case MEDIA_BUS_FMT_UYVY8_2X8:
-	case MEDIA_BUS_FMT_VYUY8_2X8:
-	case MEDIA_BUS_FMT_YUYV8_2X8:
-	case MEDIA_BUS_FMT_YVYU8_2X8:
-		if (cam->extra_fmt)
-			break;
-
-		/*
-		 * Our case is simple so far: for any of the above four camera
-		 * formats we add all our four synthesized NV* formats, so,
-		 * just marking the device with a single flag suffices. If
-		 * the format generation rules are more complex, you would have
-		 * to actually hang your already added / counted formats onto
-		 * the host_priv pointer and check whether the format you're
-		 * going to add now is already there.
-		 */
-		cam->extra_fmt = sh_mobile_ceu_formats;
-
-		n = ARRAY_SIZE(sh_mobile_ceu_formats);
-		formats += n;
-		for (k = 0; xlate && k < n; k++) {
-			xlate->host_fmt	= &sh_mobile_ceu_formats[k];
-			xlate->code	= code.code;
-			xlate++;
-			dev_dbg(dev, "Providing format %s using code %d\n",
-				sh_mobile_ceu_formats[k].name, code.code);
-		}
-		break;
-	default:
-		if (!sh_mobile_ceu_packing_supported(fmt))
-			return 0;
-	}
-
-	/* Generic pass-through */
-	formats++;
-	if (xlate) {
-		xlate->host_fmt	= fmt;
-		xlate->code	= code.code;
-		xlate++;
-		dev_dbg(dev, "Providing format %s in pass-through mode\n",
-			fmt->name);
-	}
-
-	return formats;
-}
-
-static void sh_mobile_ceu_put_formats(struct soc_camera_device *icd)
-{
-	kfree(icd->host_priv);
-	icd->host_priv = NULL;
-}
-
-#define scale_down(size, scale) soc_camera_shift_scale(size, 12, scale)
-#define calc_generic_scale(in, out) soc_camera_calc_scale(in, 12, out)
-
-/*
- * CEU can scale and crop, but we don't want to waste bandwidth and kill the
- * framerate by always requesting the maximum image from the client. See
- * Documentation/video4linux/sh_mobile_ceu_camera.txt for a description of
- * scaling and cropping algorithms and for the meaning of referenced here steps.
- */
-static int sh_mobile_ceu_set_selection(struct soc_camera_device *icd,
-				       struct v4l2_selection *sel)
-{
-	struct v4l2_rect *rect = &sel->r;
-	struct device *dev = icd->parent;
-	struct soc_camera_host *ici = to_soc_camera_host(dev);
-	struct sh_mobile_ceu_dev *pcdev = ici->priv;
-	struct v4l2_selection cam_sel;
-	struct sh_mobile_ceu_cam *cam = icd->host_priv;
-	struct v4l2_rect *cam_rect = &cam_sel.r;
-	struct v4l2_subdev *sd = soc_camera_to_subdev(icd);
-	struct v4l2_subdev_format fmt = {
-		.which = V4L2_SUBDEV_FORMAT_ACTIVE,
-	};
-	struct v4l2_mbus_framefmt *mf = &fmt.format;
-	unsigned int scale_cam_h, scale_cam_v, scale_ceu_h, scale_ceu_v,
-		out_width, out_height;
-	int interm_width, interm_height;
-	u32 capsr, cflcr;
-	int ret;
-
-	dev_geo(dev, "S_SELECTION(%ux%u@%u:%u)\n", rect->width, rect->height,
-		rect->left, rect->top);
-
-	/* During camera cropping its output window can change too, stop CEU */
-	capsr = capture_save_reset(pcdev);
-	dev_dbg(dev, "CAPSR 0x%x, CFLCR 0x%x\n", capsr, pcdev->cflcr);
-
-	/*
-	 * 1. - 2. Apply iterative camera S_SELECTION for new input window, read back
-	 * actual camera rectangle.
-	 */
-	ret = soc_camera_client_s_selection(sd, sel, &cam_sel,
-				       &cam->rect, &cam->subrect);
-	if (ret < 0)
-		return ret;
-
-	dev_geo(dev, "1-2: camera cropped to %ux%u@%u:%u\n",
-		cam_rect->width, cam_rect->height,
-		cam_rect->left, cam_rect->top);
-
-	/* On success cam_crop contains current camera crop */
-
-	/* 3. Retrieve camera output window */
-	ret = v4l2_subdev_call(sd, pad, get_fmt, NULL, &fmt);
-	if (ret < 0)
-		return ret;
-
-	if (mf->width > pcdev->max_width || mf->height > pcdev->max_height)
-		return -EINVAL;
-
-	/* 4. Calculate camera scales */
-	scale_cam_h	= calc_generic_scale(cam_rect->width, mf->width);
-	scale_cam_v	= calc_generic_scale(cam_rect->height, mf->height);
-
-	/* Calculate intermediate window */
-	interm_width	= scale_down(rect->width, scale_cam_h);
-	interm_height	= scale_down(rect->height, scale_cam_v);
-
-	if (interm_width < icd->user_width) {
-		u32 new_scale_h;
-
-		new_scale_h = calc_generic_scale(rect->width, icd->user_width);
-
-		mf->width = scale_down(cam_rect->width, new_scale_h);
-	}
-
-	if (interm_height < icd->user_height) {
-		u32 new_scale_v;
-
-		new_scale_v = calc_generic_scale(rect->height, icd->user_height);
-
-		mf->height = scale_down(cam_rect->height, new_scale_v);
-	}
-
-	if (interm_width < icd->user_width || interm_height < icd->user_height) {
-		ret = v4l2_device_call_until_err(sd->v4l2_dev,
-					soc_camera_grp_id(icd), pad,
-					set_fmt, NULL, &fmt);
-		if (ret < 0)
-			return ret;
-
-		dev_geo(dev, "New camera output %ux%u\n", mf->width, mf->height);
-		scale_cam_h	= calc_generic_scale(cam_rect->width, mf->width);
-		scale_cam_v	= calc_generic_scale(cam_rect->height, mf->height);
-		interm_width	= scale_down(rect->width, scale_cam_h);
-		interm_height	= scale_down(rect->height, scale_cam_v);
-	}
-
-	/* Cache camera output window */
-	cam->width	= mf->width;
-	cam->height	= mf->height;
-
-	if (pcdev->image_mode) {
-		out_width	= min(interm_width, icd->user_width);
-		out_height	= min(interm_height, icd->user_height);
-	} else {
-		out_width	= interm_width;
-		out_height	= interm_height;
-	}
-
-	/*
-	 * 5. Calculate CEU scales from camera scales from results of (5) and
-	 *    the user window
-	 */
-	scale_ceu_h	= calc_scale(interm_width, &out_width);
-	scale_ceu_v	= calc_scale(interm_height, &out_height);
-
-	dev_geo(dev, "5: CEU scales %u:%u\n", scale_ceu_h, scale_ceu_v);
-
-	/* Apply CEU scales. */
-	cflcr = scale_ceu_h | (scale_ceu_v << 16);
-	if (cflcr != pcdev->cflcr) {
-		pcdev->cflcr = cflcr;
-		ceu_write(pcdev, CFLCR, cflcr);
-	}
-
-	icd->user_width	 = out_width & ~3;
-	icd->user_height = out_height & ~3;
-	/* Offsets are applied at the CEU scaling filter input */
-	cam->ceu_left	 = scale_down(rect->left - cam_rect->left, scale_cam_h) & ~1;
-	cam->ceu_top	 = scale_down(rect->top - cam_rect->top, scale_cam_v) & ~1;
-
-	/* 6. Use CEU cropping to crop to the new window. */
-	sh_mobile_ceu_set_rect(icd);
-
-	cam->subrect = *rect;
-
-	dev_geo(dev, "6: CEU cropped to %ux%u@%u:%u\n",
-		icd->user_width, icd->user_height,
-		cam->ceu_left, cam->ceu_top);
-
-	/* Restore capture. The CE bit can be cleared by the hardware */
-	if (pcdev->active)
-		capsr |= 1;
-	capture_restore(pcdev, capsr);
-
-	/* Even if only camera cropping succeeded */
-	return ret;
-}
-
-static int sh_mobile_ceu_get_selection(struct soc_camera_device *icd,
-				       struct v4l2_selection *sel)
-{
-	struct sh_mobile_ceu_cam *cam = icd->host_priv;
-
-	sel->r = cam->subrect;
-
-	return 0;
-}
-
-/* Similar to set_crop multistage iterative algorithm */
-static int sh_mobile_ceu_set_fmt(struct soc_camera_device *icd,
-				 struct v4l2_format *f)
-{
-	struct device *dev = icd->parent;
-	struct soc_camera_host *ici = to_soc_camera_host(dev);
-	struct sh_mobile_ceu_dev *pcdev = ici->priv;
-	struct sh_mobile_ceu_cam *cam = icd->host_priv;
-	struct v4l2_pix_format *pix = &f->fmt.pix;
-	struct v4l2_mbus_framefmt mf;
-	__u32 pixfmt = pix->pixelformat;
-	const struct soc_camera_format_xlate *xlate;
-	unsigned int ceu_sub_width = pcdev->max_width,
-		ceu_sub_height = pcdev->max_height;
-	u16 scale_v, scale_h;
-	int ret;
-	bool image_mode;
-	enum v4l2_field field;
-
-	switch (pix->field) {
-	default:
-		pix->field = V4L2_FIELD_NONE;
-		/* fall-through */
-	case V4L2_FIELD_INTERLACED_TB:
-	case V4L2_FIELD_INTERLACED_BT:
-	case V4L2_FIELD_NONE:
-		field = pix->field;
-		break;
-	case V4L2_FIELD_INTERLACED:
-		field = V4L2_FIELD_INTERLACED_TB;
-		break;
-	}
-
-	xlate = soc_camera_xlate_by_fourcc(icd, pixfmt);
-	if (!xlate) {
-		dev_warn(dev, "Format %x not found\n", pixfmt);
-		return -EINVAL;
-	}
-
-	/* 1.-4. Calculate desired client output geometry */
-	soc_camera_calc_client_output(icd, &cam->rect, &cam->subrect, pix, &mf, 12);
-	mf.field	= pix->field;
-	mf.colorspace	= pix->colorspace;
-	mf.code		= xlate->code;
-
-	switch (pixfmt) {
-	case V4L2_PIX_FMT_NV12:
-	case V4L2_PIX_FMT_NV21:
-	case V4L2_PIX_FMT_NV16:
-	case V4L2_PIX_FMT_NV61:
-		image_mode = true;
-		break;
-	default:
-		image_mode = false;
-	}
-
-	dev_geo(dev, "S_FMT(pix=0x%x, fld 0x%x, code 0x%x, %ux%u)\n", pixfmt, mf.field, mf.code,
-		pix->width, pix->height);
-
-	dev_geo(dev, "4: request camera output %ux%u\n", mf.width, mf.height);
-
-	/* 5. - 9. */
-	ret = soc_camera_client_scale(icd, &cam->rect, &cam->subrect,
-				&mf, &ceu_sub_width, &ceu_sub_height,
-				image_mode && V4L2_FIELD_NONE == field, 12);
-
-	dev_geo(dev, "5-9: client scale return %d\n", ret);
-
-	/* Done with the camera. Now see if we can improve the result */
-
-	dev_geo(dev, "fmt %ux%u, requested %ux%u\n",
-		mf.width, mf.height, pix->width, pix->height);
-	if (ret < 0)
-		return ret;
-
-	if (mf.code != xlate->code)
-		return -EINVAL;
-
-	/* 9. Prepare CEU crop */
-	cam->width = mf.width;
-	cam->height = mf.height;
-
-	/* 10. Use CEU scaling to scale to the requested user window. */
-
-	/* We cannot scale up */
-	if (pix->width > ceu_sub_width)
-		ceu_sub_width = pix->width;
-
-	if (pix->height > ceu_sub_height)
-		ceu_sub_height = pix->height;
-
-	pix->colorspace = mf.colorspace;
-
-	if (image_mode) {
-		/* Scale pix->{width x height} down to width x height */
-		scale_h		= calc_scale(ceu_sub_width, &pix->width);
-		scale_v		= calc_scale(ceu_sub_height, &pix->height);
-	} else {
-		pix->width	= ceu_sub_width;
-		pix->height	= ceu_sub_height;
-		scale_h		= 0;
-		scale_v		= 0;
-	}
-
-	pcdev->cflcr = scale_h | (scale_v << 16);
-
-	/*
-	 * We have calculated CFLCR, the actual configuration will be performed
-	 * in sh_mobile_ceu_set_bus_param()
-	 */
-
-	dev_geo(dev, "10: W: %u : 0x%x = %u, H: %u : 0x%x = %u\n",
-		ceu_sub_width, scale_h, pix->width,
-		ceu_sub_height, scale_v, pix->height);
-
-	cam->code		= xlate->code;
-	icd->current_fmt	= xlate;
-
-	pcdev->field = field;
-	pcdev->image_mode = image_mode;
-
-	/* CFSZR requirement */
-	pix->width	&= ~3;
-	pix->height	&= ~3;
-
-	return 0;
-}
-
-#define CEU_CHDW_MAX	8188U	/* Maximum line stride */
-
-static int sh_mobile_ceu_try_fmt(struct soc_camera_device *icd,
-				 struct v4l2_format *f)
-{
-	struct soc_camera_host *ici = to_soc_camera_host(icd->parent);
-	struct sh_mobile_ceu_dev *pcdev = ici->priv;
-	const struct soc_camera_format_xlate *xlate;
-	struct v4l2_pix_format *pix = &f->fmt.pix;
-	struct v4l2_subdev *sd = soc_camera_to_subdev(icd);
-	struct v4l2_subdev_pad_config pad_cfg;
-	struct v4l2_subdev_format format = {
-		.which = V4L2_SUBDEV_FORMAT_TRY,
-	};
-	struct v4l2_mbus_framefmt *mf = &format.format;
-	__u32 pixfmt = pix->pixelformat;
-	int width, height;
-	int ret;
-
-	dev_geo(icd->parent, "TRY_FMT(pix=0x%x, %ux%u)\n",
-		 pixfmt, pix->width, pix->height);
-
-	xlate = soc_camera_xlate_by_fourcc(icd, pixfmt);
-	if (!xlate) {
-		xlate = icd->current_fmt;
-		dev_dbg(icd->parent, "Format %x not found, keeping %x\n",
-			pixfmt, xlate->host_fmt->fourcc);
-		pixfmt = xlate->host_fmt->fourcc;
-		pix->pixelformat = pixfmt;
-		pix->colorspace = icd->colorspace;
-	}
-
-	/* FIXME: calculate using depth and bus width */
-
-	/* CFSZR requires height and width to be 4-pixel aligned */
-	v4l_bound_align_image(&pix->width, 2, pcdev->max_width, 2,
-			      &pix->height, 4, pcdev->max_height, 2, 0);
-
-	width = pix->width;
-	height = pix->height;
-
-	/* limit to sensor capabilities */
-	mf->width	= pix->width;
-	mf->height	= pix->height;
-	mf->field	= pix->field;
-	mf->code	= xlate->code;
-	mf->colorspace	= pix->colorspace;
-
-	ret = v4l2_device_call_until_err(sd->v4l2_dev, soc_camera_grp_id(icd),
-					 pad, set_fmt, &pad_cfg, &format);
-	if (ret < 0)
-		return ret;
-
-	pix->width	= mf->width;
-	pix->height	= mf->height;
-	pix->field	= mf->field;
-	pix->colorspace	= mf->colorspace;
-
-	switch (pixfmt) {
-	case V4L2_PIX_FMT_NV12:
-	case V4L2_PIX_FMT_NV21:
-	case V4L2_PIX_FMT_NV16:
-	case V4L2_PIX_FMT_NV61:
-		/* FIXME: check against rect_max after converting soc-camera */
-		/* We can scale precisely, need a bigger image from camera */
-		if (pix->width < width || pix->height < height) {
-			/*
-			 * We presume, the sensor behaves sanely, i.e., if
-			 * requested a bigger rectangle, it will not return a
-			 * smaller one.
-			 */
-			mf->width = pcdev->max_width;
-			mf->height = pcdev->max_height;
-			ret = v4l2_device_call_until_err(sd->v4l2_dev,
-					soc_camera_grp_id(icd), pad,
-					set_fmt, &pad_cfg, &format);
-			if (ret < 0) {
-				/* Shouldn't actually happen... */
-				dev_err(icd->parent,
-					"FIXME: client try_fmt() = %d\n", ret);
-				return ret;
-			}
-		}
-		/* We will scale exactly */
-		if (mf->width > width)
-			pix->width = width;
-		if (mf->height > height)
-			pix->height = height;
-
-		pix->bytesperline = max(pix->bytesperline, pix->width);
-		pix->bytesperline = min(pix->bytesperline, CEU_CHDW_MAX);
-		pix->bytesperline &= ~3;
-		break;
-
-	default:
-		/* Configurable stride isn't supported in pass-through mode. */
-		pix->bytesperline  = 0;
-	}
-
-	pix->width	&= ~3;
-	pix->height	&= ~3;
-	pix->sizeimage	= 0;
-
-	dev_geo(icd->parent, "%s(): return %d, fmt 0x%x, %ux%u\n",
-		__func__, ret, pix->pixelformat, pix->width, pix->height);
-
-	return ret;
-}
-
-static int sh_mobile_ceu_set_liveselection(struct soc_camera_device *icd,
-					   struct v4l2_selection *sel)
-{
-	struct v4l2_subdev *sd = soc_camera_to_subdev(icd);
-	struct soc_camera_host *ici = to_soc_camera_host(icd->parent);
-	struct sh_mobile_ceu_dev *pcdev = ici->priv;
-	u32 out_width = icd->user_width, out_height = icd->user_height;
-	int ret;
-
-	/* Freeze queue */
-	pcdev->frozen = 1;
-	/* Wait for frame */
-	ret = wait_for_completion_interruptible(&pcdev->complete);
-	/* Stop the client */
-	ret = v4l2_subdev_call(sd, video, s_stream, 0);
-	if (ret < 0)
-		dev_warn(icd->parent,
-			 "Client failed to stop the stream: %d\n", ret);
-	else
-		/* Do the crop, if it fails, there's nothing more we can do */
-		sh_mobile_ceu_set_selection(icd, sel);
-
-	dev_geo(icd->parent, "Output after crop: %ux%u\n", icd->user_width, icd->user_height);
-
-	if (icd->user_width != out_width || icd->user_height != out_height) {
-		struct v4l2_format f = {
-			.type	= V4L2_BUF_TYPE_VIDEO_CAPTURE,
-			.fmt.pix	= {
-				.width		= out_width,
-				.height		= out_height,
-				.pixelformat	= icd->current_fmt->host_fmt->fourcc,
-				.field		= pcdev->field,
-				.colorspace	= icd->colorspace,
-			},
-		};
-		ret = sh_mobile_ceu_set_fmt(icd, &f);
-		if (!ret && (out_width != f.fmt.pix.width ||
-			     out_height != f.fmt.pix.height))
-			ret = -EINVAL;
-		if (!ret) {
-			icd->user_width		= out_width & ~3;
-			icd->user_height	= out_height & ~3;
-			ret = sh_mobile_ceu_set_bus_param(icd);
-		}
-	}
-
-	/* Thaw the queue */
-	pcdev->frozen = 0;
-	spin_lock_irq(&pcdev->lock);
-	sh_mobile_ceu_capture(pcdev);
-	spin_unlock_irq(&pcdev->lock);
-	/* Start the client */
-	ret = v4l2_subdev_call(sd, video, s_stream, 1);
-	return ret;
-}
-
-static unsigned int sh_mobile_ceu_poll(struct file *file, poll_table *pt)
-{
-	struct soc_camera_device *icd = file->private_data;
-
-	return vb2_poll(&icd->vb2_vidq, file, pt);
-}
-
-static int sh_mobile_ceu_querycap(struct soc_camera_host *ici,
-				  struct v4l2_capability *cap)
-{
-	strlcpy(cap->card, "SuperH_Mobile_CEU", sizeof(cap->card));
-	strlcpy(cap->driver, "sh_mobile_ceu", sizeof(cap->driver));
-	strlcpy(cap->bus_info, "platform:sh_mobile_ceu", sizeof(cap->bus_info));
-	cap->device_caps = V4L2_CAP_VIDEO_CAPTURE | V4L2_CAP_STREAMING;
-	cap->capabilities = cap->device_caps | V4L2_CAP_DEVICE_CAPS;
-
-	return 0;
-}
-
-static int sh_mobile_ceu_init_videobuf(struct vb2_queue *q,
-				       struct soc_camera_device *icd)
-{
-	struct soc_camera_host *ici = to_soc_camera_host(icd->parent);
-
-	q->type = V4L2_BUF_TYPE_VIDEO_CAPTURE;
-	q->io_modes = VB2_MMAP | VB2_USERPTR;
-	q->drv_priv = icd;
-	q->ops = &sh_mobile_ceu_videobuf_ops;
-	q->mem_ops = &vb2_dma_contig_memops;
-	q->buf_struct_size = sizeof(struct sh_mobile_ceu_buffer);
-	q->timestamp_flags = V4L2_BUF_FLAG_TIMESTAMP_MONOTONIC;
-	q->lock = &ici->host_lock;
-	q->dev = ici->v4l2_dev.dev;
-
-	return vb2_queue_init(q);
-}
-
-static struct soc_camera_host_ops sh_mobile_ceu_host_ops = {
-	.owner		= THIS_MODULE,
-	.add		= sh_mobile_ceu_add_device,
-	.remove		= sh_mobile_ceu_remove_device,
-	.clock_start	= sh_mobile_ceu_clock_start,
-	.clock_stop	= sh_mobile_ceu_clock_stop,
-	.get_formats	= sh_mobile_ceu_get_formats,
-	.put_formats	= sh_mobile_ceu_put_formats,
-	.get_selection	= sh_mobile_ceu_get_selection,
-	.set_selection	= sh_mobile_ceu_set_selection,
-	.set_liveselection	= sh_mobile_ceu_set_liveselection,
-	.set_fmt	= sh_mobile_ceu_set_fmt,
-	.try_fmt	= sh_mobile_ceu_try_fmt,
-	.poll		= sh_mobile_ceu_poll,
-	.querycap	= sh_mobile_ceu_querycap,
-	.set_bus_param	= sh_mobile_ceu_set_bus_param,
-	.init_videobuf2	= sh_mobile_ceu_init_videobuf,
-};
-
-struct bus_wait {
-	struct notifier_block	notifier;
-	struct completion	completion;
-	struct device		*dev;
-};
-
-static int bus_notify(struct notifier_block *nb,
-		      unsigned long action, void *data)
-{
-	struct device *dev = data;
-	struct bus_wait *wait = container_of(nb, struct bus_wait, notifier);
-
-	if (wait->dev != dev)
-		return NOTIFY_DONE;
-
-	switch (action) {
-	case BUS_NOTIFY_UNBOUND_DRIVER:
-		/* Protect from module unloading */
-		wait_for_completion(&wait->completion);
-		return NOTIFY_OK;
-	}
-	return NOTIFY_DONE;
-}
-
-static int sh_mobile_ceu_probe(struct platform_device *pdev)
-{
-	struct sh_mobile_ceu_dev *pcdev;
-	struct resource *res;
-	void __iomem *base;
-	unsigned int irq;
-	int err;
-	struct bus_wait wait = {
-		.completion = COMPLETION_INITIALIZER_ONSTACK(wait.completion),
-		.notifier.notifier_call = bus_notify,
-	};
-
-	res = platform_get_resource(pdev, IORESOURCE_MEM, 0);
-	irq = platform_get_irq(pdev, 0);
-	if (!res || (int)irq <= 0) {
-		dev_err(&pdev->dev, "Not enough CEU platform resources.\n");
-		return -ENODEV;
-	}
-
-	pcdev = devm_kzalloc(&pdev->dev, sizeof(*pcdev), GFP_KERNEL);
-	if (!pcdev) {
-		dev_err(&pdev->dev, "Could not allocate pcdev\n");
-		return -ENOMEM;
-	}
-
-	INIT_LIST_HEAD(&pcdev->capture);
-	spin_lock_init(&pcdev->lock);
-	init_completion(&pcdev->complete);
-
-	pcdev->pdata = pdev->dev.platform_data;
-	if (!pcdev->pdata && !pdev->dev.of_node) {
-		dev_err(&pdev->dev, "CEU platform data not set.\n");
-		return -EINVAL;
-	}
-
-	/* TODO: implement per-device bus flags */
-	if (pcdev->pdata) {
-		pcdev->max_width = pcdev->pdata->max_width;
-		pcdev->max_height = pcdev->pdata->max_height;
-		pcdev->flags = pcdev->pdata->flags;
-	}
-	pcdev->field = V4L2_FIELD_NONE;
-
-	if (!pcdev->max_width) {
-		unsigned int v;
-		err = of_property_read_u32(pdev->dev.of_node, "renesas,max-width", &v);
-		if (!err)
-			pcdev->max_width = v;
-
-		if (!pcdev->max_width)
-			pcdev->max_width = 2560;
-	}
-	if (!pcdev->max_height) {
-		unsigned int v;
-		err = of_property_read_u32(pdev->dev.of_node, "renesas,max-height", &v);
-		if (!err)
-			pcdev->max_height = v;
-
-		if (!pcdev->max_height)
-			pcdev->max_height = 1920;
-	}
-
-	base = devm_ioremap_resource(&pdev->dev, res);
-	if (IS_ERR(base))
-		return PTR_ERR(base);
-
-	pcdev->irq = irq;
-	pcdev->base = base;
-	pcdev->video_limit = 0; /* only enabled if second resource exists */
-
-	res = platform_get_resource(pdev, IORESOURCE_MEM, 1);
-	if (res) {
-		err = dma_declare_coherent_memory(&pdev->dev, res->start,
-						  res->start,
-						  resource_size(res),
-						  DMA_MEMORY_MAP |
-						  DMA_MEMORY_EXCLUSIVE);
-		if (!err) {
-			dev_err(&pdev->dev, "Unable to declare CEU memory.\n");
-			return -ENXIO;
-		}
-
-		pcdev->video_limit = resource_size(res);
-	}
-
-	/* request irq */
-	err = devm_request_irq(&pdev->dev, pcdev->irq, sh_mobile_ceu_irq,
-			       0, dev_name(&pdev->dev), pcdev);
-	if (err) {
-		dev_err(&pdev->dev, "Unable to register CEU interrupt.\n");
-		goto exit_release_mem;
-	}
-
-	pm_suspend_ignore_children(&pdev->dev, true);
-	pm_runtime_enable(&pdev->dev);
-	pm_runtime_resume(&pdev->dev);
-
-	pcdev->ici.priv = pcdev;
-	pcdev->ici.v4l2_dev.dev = &pdev->dev;
-	pcdev->ici.nr = pdev->id;
-	pcdev->ici.drv_name = dev_name(&pdev->dev);
-	pcdev->ici.ops = &sh_mobile_ceu_host_ops;
-	pcdev->ici.capabilities = SOCAM_HOST_CAP_STRIDE;
-
-	if (pcdev->pdata && pcdev->pdata->asd_sizes) {
-		pcdev->ici.asd = pcdev->pdata->asd;
-		pcdev->ici.asd_sizes = pcdev->pdata->asd_sizes;
-	}
-
-	err = soc_camera_host_register(&pcdev->ici);
-	if (err)
-		goto exit_free_clk;
-
-	return 0;
-
-exit_free_clk:
-	pm_runtime_disable(&pdev->dev);
-exit_release_mem:
-	if (platform_get_resource(pdev, IORESOURCE_MEM, 1))
-		dma_release_declared_memory(&pdev->dev);
-	return err;
-}
-
-static int sh_mobile_ceu_remove(struct platform_device *pdev)
-{
-	struct soc_camera_host *soc_host = to_soc_camera_host(&pdev->dev);
-
-	soc_camera_host_unregister(soc_host);
-	pm_runtime_disable(&pdev->dev);
-	if (platform_get_resource(pdev, IORESOURCE_MEM, 1))
-		dma_release_declared_memory(&pdev->dev);
-
-	return 0;
-}
-
-static int sh_mobile_ceu_runtime_nop(struct device *dev)
-{
-	/* Runtime PM callback shared between ->runtime_suspend()
-	 * and ->runtime_resume(). Simply returns success.
-	 *
-	 * This driver re-initializes all registers after
-	 * pm_runtime_get_sync() anyway so there is no need
-	 * to save and restore registers here.
-	 */
-	return 0;
-}
-
-static const struct dev_pm_ops sh_mobile_ceu_dev_pm_ops = {
-	.runtime_suspend = sh_mobile_ceu_runtime_nop,
-	.runtime_resume = sh_mobile_ceu_runtime_nop,
-};
-
-static const struct of_device_id sh_mobile_ceu_of_match[] = {
-	{ .compatible = "renesas,sh-mobile-ceu" },
-	{ }
-};
-MODULE_DEVICE_TABLE(of, sh_mobile_ceu_of_match);
-
-static struct platform_driver sh_mobile_ceu_driver = {
-	.driver		= {
-		.name	= "sh_mobile_ceu",
-		.pm	= &sh_mobile_ceu_dev_pm_ops,
-		.of_match_table = sh_mobile_ceu_of_match,
-	},
-	.probe		= sh_mobile_ceu_probe,
-	.remove		= sh_mobile_ceu_remove,
-};
-
-static int __init sh_mobile_ceu_init(void)
-{
-	return platform_driver_register(&sh_mobile_ceu_driver);
-}
-
-static void __exit sh_mobile_ceu_exit(void)
-{
-	platform_driver_unregister(&sh_mobile_ceu_driver);
-}
-
-module_init(sh_mobile_ceu_init);
-module_exit(sh_mobile_ceu_exit);
-
-MODULE_DESCRIPTION("SuperH Mobile CEU driver");
-MODULE_AUTHOR("Magnus Damm");
-MODULE_LICENSE("GPL");
-MODULE_VERSION("0.1.0");
-MODULE_ALIAS("platform:sh_mobile_ceu");
-- 
2.7.4