[media] omap24xx/tcm825x: move to staging for future removal

The omap24xx driver and the tcm825x sensor driver are the only two
remaining drivers to still use the old deprecated v4l2-int-device API.

Nobody maintains these drivers anymore. But unfortunately the v4l2-int-device
API is used by out-of-tree drivers (MXC platform). This is a very bad situation
since as long as this deprecated API stays in the kernel there is no reason for
those out-of-tree drivers to convert.

This patch moves v4l2-int-device and the two drivers that depend on it to
staging in preparation for their removal.

If someone would be interested in getting these drivers to work, then start with
this since it's not very far from the state where they used to work:

<URL:http://vihersipuli.retiisi.org.uk/cgi-bin/gitweb.cgi?p=~sailus/linux-omap/.git;a=summary>

The branch is n800-cam. Porting to up-to-date APIs can then be done. David
might have done some work in that area, so check with him first.

Signed-off-by: Hans Verkuil <hans.verkuil@cisco.com>
Cc: Sakari Ailus <sakari.ailus@iki.fi>
Cc: David Cohen <dacohen@gmail.com>
Signed-off-by: Mauro Carvalho Chehab <m.chehab@samsung.com>

1 files changed, 0 insertions, 1888 deletions

diff --git a/drivers/media/platform/omap24xxcam.c b/drivers/media/platform/omap24xxcam.c
deleted file mode 100644
index d2b440c..0000000
--- a/drivers/media/platform/omap24xxcam.c
+++ /dev/null
@@ -1,1888 +0,0 @@
-/*
- * drivers/media/platform/omap24xxcam.c
- *
- * OMAP 2 camera block driver.
- *
- * Copyright (C) 2004 MontaVista Software, Inc.
- * Copyright (C) 2004 Texas Instruments.
- * Copyright (C) 2007-2008 Nokia Corporation.
- *
- * Contact: Sakari Ailus <sakari.ailus@nokia.com>
- *
- * Based on code from Andy Lowe <source@mvista.com>
- *
- * This program is free software; you can redistribute it and/or
- * modify it under the terms of the GNU General Public License
- * version 2 as published by the Free Software Foundation.
- *
- * This program is distributed in the hope that it will be useful, but
- * WITHOUT ANY WARRANTY; without even the implied warranty of
- * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the GNU
- * General Public License for more details.
- *
- * You should have received a copy of the GNU General Public License
- * along with this program; if not, write to the Free Software
- * Foundation, Inc., 51 Franklin St, Fifth Floor, Boston, MA
- * 02110-1301 USA
- */
-
-#include <linux/delay.h>
-#include <linux/kernel.h>
-#include <linux/interrupt.h>
-#include <linux/videodev2.h>
-#include <linux/pci.h>		/* needed for videobufs */
-#include <linux/platform_device.h>
-#include <linux/clk.h>
-#include <linux/io.h>
-#include <linux/slab.h>
-#include <linux/sched.h>
-#include <linux/module.h>
-
-#include <media/v4l2-common.h>
-#include <media/v4l2-ioctl.h>
-
-#include "omap24xxcam.h"
-
-#define OMAP24XXCAM_VERSION "0.0.1"
-
-#define RESET_TIMEOUT_NS 10000
-
-static void omap24xxcam_reset(struct omap24xxcam_device *cam);
-static int omap24xxcam_sensor_if_enable(struct omap24xxcam_device *cam);
-static void omap24xxcam_device_unregister(struct v4l2_int_device *s);
-static int omap24xxcam_remove(struct platform_device *pdev);
-
-/* module parameters */
-static int video_nr = -1;	/* video device minor (-1 ==> auto assign) */
-/*
- * Maximum amount of memory to use for capture buffers.
- * Default is 4800KB, enough to double-buffer SXGA.
- */
-static int capture_mem = 1280 * 960 * 2 * 2;
-
-static struct v4l2_int_device omap24xxcam;
-
-/*
- *
- * Clocks.
- *
- */
-
-static void omap24xxcam_clock_put(struct omap24xxcam_device *cam)
-{
-	if (cam->ick != NULL && !IS_ERR(cam->ick))
-		clk_put(cam->ick);
-	if (cam->fck != NULL && !IS_ERR(cam->fck))
-		clk_put(cam->fck);
-
-	cam->ick = cam->fck = NULL;
-}
-
-static int omap24xxcam_clock_get(struct omap24xxcam_device *cam)
-{
-	int rval = 0;
-
-	cam->fck = clk_get(cam->dev, "fck");
-	if (IS_ERR(cam->fck)) {
-		dev_err(cam->dev, "can't get camera fck");
-		rval = PTR_ERR(cam->fck);
-		omap24xxcam_clock_put(cam);
-		return rval;
-	}
-
-	cam->ick = clk_get(cam->dev, "ick");
-	if (IS_ERR(cam->ick)) {
-		dev_err(cam->dev, "can't get camera ick");
-		rval = PTR_ERR(cam->ick);
-		omap24xxcam_clock_put(cam);
-	}
-
-	return rval;
-}
-
-static void omap24xxcam_clock_on(struct omap24xxcam_device *cam)
-{
-	clk_enable(cam->fck);
-	clk_enable(cam->ick);
-}
-
-static void omap24xxcam_clock_off(struct omap24xxcam_device *cam)
-{
-	clk_disable(cam->fck);
-	clk_disable(cam->ick);
-}
-
-/*
- *
- * Camera core
- *
- */
-
-/*
- * Set xclk.
- *
- * To disable xclk, use value zero.
- */
-static void omap24xxcam_core_xclk_set(const struct omap24xxcam_device *cam,
-				      u32 xclk)
-{
-	if (xclk) {
-		u32 divisor = CAM_MCLK / xclk;
-
-		if (divisor == 1)
-			omap24xxcam_reg_out(cam->mmio_base + CC_REG_OFFSET,
-					    CC_CTRL_XCLK,
-					    CC_CTRL_XCLK_DIV_BYPASS);
-		else
-			omap24xxcam_reg_out(cam->mmio_base + CC_REG_OFFSET,
-					    CC_CTRL_XCLK, divisor);
-	} else
-		omap24xxcam_reg_out(cam->mmio_base + CC_REG_OFFSET,
-				    CC_CTRL_XCLK, CC_CTRL_XCLK_DIV_STABLE_LOW);
-}
-
-static void omap24xxcam_core_hwinit(const struct omap24xxcam_device *cam)
-{
-	/*
-	 * Setting the camera core AUTOIDLE bit causes problems with frame
-	 * synchronization, so we will clear the AUTOIDLE bit instead.
-	 */
-	omap24xxcam_reg_out(cam->mmio_base + CC_REG_OFFSET, CC_SYSCONFIG,
-			    CC_SYSCONFIG_AUTOIDLE);
-
-	/* program the camera interface DMA packet size */
-	omap24xxcam_reg_out(cam->mmio_base + CC_REG_OFFSET, CC_CTRL_DMA,
-			    CC_CTRL_DMA_EN | (DMA_THRESHOLD / 4 - 1));
-
-	/* enable camera core error interrupts */
-	omap24xxcam_reg_out(cam->mmio_base + CC_REG_OFFSET, CC_IRQENABLE,
-			    CC_IRQENABLE_FW_ERR_IRQ
-			    | CC_IRQENABLE_FSC_ERR_IRQ
-			    | CC_IRQENABLE_SSC_ERR_IRQ
-			    | CC_IRQENABLE_FIFO_OF_IRQ);
-}
-
-/*
- * Enable the camera core.
- *
- * Data transfer to the camera DMA starts from next starting frame.
- */
-static void omap24xxcam_core_enable(const struct omap24xxcam_device *cam)
-{
-
-	omap24xxcam_reg_out(cam->mmio_base + CC_REG_OFFSET, CC_CTRL,
-			    cam->cc_ctrl);
-}
-
-/*
- * Disable camera core.
- *
- * The data transfer will be stopped immediately (CC_CTRL_CC_RST). The
- * core internal state machines will be reset. Use
- * CC_CTRL_CC_FRAME_TRIG instead if you want to transfer the current
- * frame completely.
- */
-static void omap24xxcam_core_disable(const struct omap24xxcam_device *cam)
-{
-	omap24xxcam_reg_out(cam->mmio_base + CC_REG_OFFSET, CC_CTRL,
-			    CC_CTRL_CC_RST);
-}
-
-/* Interrupt service routine for camera core interrupts. */
-static void omap24xxcam_core_isr(struct omap24xxcam_device *cam)
-{
-	u32 cc_irqstatus;
-	const u32 cc_irqstatus_err =
-		CC_IRQSTATUS_FW_ERR_IRQ
-		| CC_IRQSTATUS_FSC_ERR_IRQ
-		| CC_IRQSTATUS_SSC_ERR_IRQ
-		| CC_IRQSTATUS_FIFO_UF_IRQ
-		| CC_IRQSTATUS_FIFO_OF_IRQ;
-
-	cc_irqstatus = omap24xxcam_reg_in(cam->mmio_base + CC_REG_OFFSET,
-					  CC_IRQSTATUS);
-	omap24xxcam_reg_out(cam->mmio_base + CC_REG_OFFSET, CC_IRQSTATUS,
-			    cc_irqstatus);
-
-	if (cc_irqstatus & cc_irqstatus_err
-	    && !atomic_read(&cam->in_reset)) {
-		dev_dbg(cam->dev, "resetting camera, cc_irqstatus 0x%x\n",
-			cc_irqstatus);
-		omap24xxcam_reset(cam);
-	}
-}
-
-/*
- *
- * videobuf_buffer handling.
- *
- * Memory for mmapped videobuf_buffers is not allocated
- * conventionally, but by several kmalloc allocations and then
- * creating the scatterlist on our own. User-space buffers are handled
- * normally.
- *
- */
-
-/*
- * Free the memory-mapped buffer memory allocated for a
- * videobuf_buffer and the associated scatterlist.
- */
-static void omap24xxcam_vbq_free_mmap_buffer(struct videobuf_buffer *vb)
-{
-	struct videobuf_dmabuf *dma = videobuf_to_dma(vb);
-	size_t alloc_size;
-	struct page *page;
-	int i;
-
-	if (dma->sglist == NULL)
-		return;
-
-	i = dma->sglen;
-	while (i) {
-		i--;
-		alloc_size = sg_dma_len(&dma->sglist[i]);
-		page = sg_page(&dma->sglist[i]);
-		do {
-			ClearPageReserved(page++);
-		} while (alloc_size -= PAGE_SIZE);
-		__free_pages(sg_page(&dma->sglist[i]),
-			     get_order(sg_dma_len(&dma->sglist[i])));
-	}
-
-	kfree(dma->sglist);
-	dma->sglist = NULL;
-}
-
-/* Release all memory related to the videobuf_queue. */
-static void omap24xxcam_vbq_free_mmap_buffers(struct videobuf_queue *vbq)
-{
-	int i;
-
-	mutex_lock(&vbq->vb_lock);
-
-	for (i = 0; i < VIDEO_MAX_FRAME; i++) {
-		if (NULL == vbq->bufs[i])
-			continue;
-		if (V4L2_MEMORY_MMAP != vbq->bufs[i]->memory)
-			continue;
-		vbq->ops->buf_release(vbq, vbq->bufs[i]);
-		omap24xxcam_vbq_free_mmap_buffer(vbq->bufs[i]);
-		kfree(vbq->bufs[i]);
-		vbq->bufs[i] = NULL;
-	}
-
-	mutex_unlock(&vbq->vb_lock);
-
-	videobuf_mmap_free(vbq);
-}
-
-/*
- * Allocate physically as contiguous as possible buffer for video
- * frame and allocate and build DMA scatter-gather list for it.
- */
-static int omap24xxcam_vbq_alloc_mmap_buffer(struct videobuf_buffer *vb)
-{
-	unsigned int order;
-	size_t alloc_size, size = vb->bsize; /* vb->bsize is page aligned */
-	struct page *page;
-	int max_pages, err = 0, i = 0;
-	struct videobuf_dmabuf *dma = videobuf_to_dma(vb);
-
-	/*
-	 * allocate maximum size scatter-gather list. Note this is
-	 * overhead. We may not use as many entries as we allocate
-	 */
-	max_pages = vb->bsize >> PAGE_SHIFT;
-	dma->sglist = kcalloc(max_pages, sizeof(*dma->sglist), GFP_KERNEL);
-	if (dma->sglist == NULL) {
-		err = -ENOMEM;
-		goto out;
-	}
-
-	while (size) {
-		order = get_order(size);
-		/*
-		 * do not over-allocate even if we would get larger
-		 * contiguous chunk that way
-		 */
-		if ((PAGE_SIZE << order) > size)
-			order--;
-
-		/* try to allocate as many contiguous pages as possible */
-		page = alloc_pages(GFP_KERNEL, order);
-		/* if allocation fails, try to allocate smaller amount */
-		while (page == NULL) {
-			order--;
-			page = alloc_pages(GFP_KERNEL, order);
-			if (page == NULL && !order) {
-				err = -ENOMEM;
-				goto out;
-			}
-		}
-		size -= (PAGE_SIZE << order);
-
-		/* append allocated chunk of pages into scatter-gather list */
-		sg_set_page(&dma->sglist[i], page, PAGE_SIZE << order, 0);
-		dma->sglen++;
-		i++;
-
-		alloc_size = (PAGE_SIZE << order);
-
-		/* clear pages before giving them to user space */
-		memset(page_address(page), 0, alloc_size);
-
-		/* mark allocated pages reserved */
-		do {
-			SetPageReserved(page++);
-		} while (alloc_size -= PAGE_SIZE);
-	}
-	/*
-	 * REVISIT: not fully correct to assign nr_pages == sglen but
-	 * video-buf is passing nr_pages for e.g. unmap_sg calls
-	 */
-	dma->nr_pages = dma->sglen;
-	dma->direction = PCI_DMA_FROMDEVICE;
-
-	return 0;
-
-out:
-	omap24xxcam_vbq_free_mmap_buffer(vb);
-	return err;
-}
-
-static int omap24xxcam_vbq_alloc_mmap_buffers(struct videobuf_queue *vbq,
-					      unsigned int count)
-{
-	int i, err = 0;
-	struct omap24xxcam_fh *fh =
-		container_of(vbq, struct omap24xxcam_fh, vbq);
-
-	mutex_lock(&vbq->vb_lock);
-
-	for (i = 0; i < count; i++) {
-		err = omap24xxcam_vbq_alloc_mmap_buffer(vbq->bufs[i]);
-		if (err)
-			goto out;
-		dev_dbg(fh->cam->dev, "sglen is %d for buffer %d\n",
-			videobuf_to_dma(vbq->bufs[i])->sglen, i);
-	}
-
-	mutex_unlock(&vbq->vb_lock);
-
-	return 0;
-out:
-	while (i) {
-		i--;
-		omap24xxcam_vbq_free_mmap_buffer(vbq->bufs[i]);
-	}
-
-	mutex_unlock(&vbq->vb_lock);
-
-	return err;
-}
-
-/*
- * This routine is called from interrupt context when a scatter-gather DMA
- * transfer of a videobuf_buffer completes.
- */
-static void omap24xxcam_vbq_complete(struct omap24xxcam_sgdma *sgdma,
-				     u32 csr, void *arg)
-{
-	struct omap24xxcam_device *cam =
-		container_of(sgdma, struct omap24xxcam_device, sgdma);
-	struct omap24xxcam_fh *fh = cam->streaming->private_data;
-	struct videobuf_buffer *vb = (struct videobuf_buffer *)arg;
-	const u32 csr_error = CAMDMA_CSR_MISALIGNED_ERR
-		| CAMDMA_CSR_SUPERVISOR_ERR | CAMDMA_CSR_SECURE_ERR
-		| CAMDMA_CSR_TRANS_ERR | CAMDMA_CSR_DROP;
-	unsigned long flags;
-
-	spin_lock_irqsave(&cam->core_enable_disable_lock, flags);
-	if (--cam->sgdma_in_queue == 0)
-		omap24xxcam_core_disable(cam);
-	spin_unlock_irqrestore(&cam->core_enable_disable_lock, flags);
-
-	v4l2_get_timestamp(&vb->ts);
-	vb->field_count = atomic_add_return(2, &fh->field_count);
-	if (csr & csr_error) {
-		vb->state = VIDEOBUF_ERROR;
-		if (!atomic_read(&fh->cam->in_reset)) {
-			dev_dbg(cam->dev, "resetting camera, csr 0x%x\n", csr);
-			omap24xxcam_reset(cam);
-		}
-	} else
-		vb->state = VIDEOBUF_DONE;
-	wake_up(&vb->done);
-}
-
-static void omap24xxcam_vbq_release(struct videobuf_queue *vbq,
-				    struct videobuf_buffer *vb)
-{
-	struct videobuf_dmabuf *dma = videobuf_to_dma(vb);
-
-	/* wait for buffer, especially to get out of the sgdma queue */
-	videobuf_waiton(vbq, vb, 0, 0);
-	if (vb->memory == V4L2_MEMORY_MMAP) {
-		dma_unmap_sg(vbq->dev, dma->sglist, dma->sglen,
-			     dma->direction);
-		dma->direction = DMA_NONE;
-	} else {
-		videobuf_dma_unmap(vbq->dev, videobuf_to_dma(vb));
-		videobuf_dma_free(videobuf_to_dma(vb));
-	}
-
-	vb->state = VIDEOBUF_NEEDS_INIT;
-}
-
-/*
- * Limit the number of available kernel image capture buffers based on the
- * number requested, the currently selected image size, and the maximum
- * amount of memory permitted for kernel capture buffers.
- */
-static int omap24xxcam_vbq_setup(struct videobuf_queue *vbq, unsigned int *cnt,
-				 unsigned int *size)
-{
-	struct omap24xxcam_fh *fh = vbq->priv_data;
-
-	if (*cnt <= 0)
-		*cnt = VIDEO_MAX_FRAME;	/* supply a default number of buffers */
-
-	if (*cnt > VIDEO_MAX_FRAME)
-		*cnt = VIDEO_MAX_FRAME;
-
-	*size = fh->pix.sizeimage;
-
-	/* accessing fh->cam->capture_mem is ok, it's constant */
-	if (*size * *cnt > fh->cam->capture_mem)
-		*cnt = fh->cam->capture_mem / *size;
-
-	return 0;
-}
-
-static int omap24xxcam_dma_iolock(struct videobuf_queue *vbq,
-				  struct videobuf_dmabuf *dma)
-{
-	int err = 0;
-
-	dma->direction = PCI_DMA_FROMDEVICE;
-	if (!dma_map_sg(vbq->dev, dma->sglist, dma->sglen, dma->direction)) {
-		kfree(dma->sglist);
-		dma->sglist = NULL;
-		dma->sglen = 0;
-		err = -EIO;
-	}
-
-	return err;
-}
-
-static int omap24xxcam_vbq_prepare(struct videobuf_queue *vbq,
-				   struct videobuf_buffer *vb,
-				   enum v4l2_field field)
-{
-	struct omap24xxcam_fh *fh = vbq->priv_data;
-	int err = 0;
-
-	/*
-	 * Accessing pix here is okay since it's constant while
-	 * streaming is on (and we only get called then).
-	 */
-	if (vb->baddr) {
-		/* This is a userspace buffer. */
-		if (fh->pix.sizeimage > vb->bsize) {
-			/* The buffer isn't big enough. */
-			err = -EINVAL;
-		} else
-			vb->size = fh->pix.sizeimage;
-	} else {
-		if (vb->state != VIDEOBUF_NEEDS_INIT) {
-			/*
-			 * We have a kernel bounce buffer that has
-			 * already been allocated.
-			 */
-			if (fh->pix.sizeimage > vb->size) {
-				/*
-				 * The image size has been changed to
-				 * a larger size since this buffer was
-				 * allocated, so we need to free and
-				 * reallocate it.
-				 */
-				omap24xxcam_vbq_release(vbq, vb);
-				vb->size = fh->pix.sizeimage;
-			}
-		} else {
-			/* We need to allocate a new kernel bounce buffer. */
-			vb->size = fh->pix.sizeimage;
-		}
-	}
-
-	if (err)
-		return err;
-
-	vb->width = fh->pix.width;
-	vb->height = fh->pix.height;
-	vb->field = field;
-
-	if (vb->state == VIDEOBUF_NEEDS_INIT) {
-		if (vb->memory == V4L2_MEMORY_MMAP)
-			/*
-			 * we have built the scatter-gather list by ourself so
-			 * do the scatter-gather mapping as well
-			 */
-			err = omap24xxcam_dma_iolock(vbq, videobuf_to_dma(vb));
-		else
-			err = videobuf_iolock(vbq, vb, NULL);
-	}
-
-	if (!err)
-		vb->state = VIDEOBUF_PREPARED;
-	else
-		omap24xxcam_vbq_release(vbq, vb);
-
-	return err;
-}
-
-static void omap24xxcam_vbq_queue(struct videobuf_queue *vbq,
-				  struct videobuf_buffer *vb)
-{
-	struct omap24xxcam_fh *fh = vbq->priv_data;
-	struct omap24xxcam_device *cam = fh->cam;
-	enum videobuf_state state = vb->state;
-	unsigned long flags;
-	int err;
-
-	/*
-	 * FIXME: We're marking the buffer active since we have no
-	 * pretty way of marking it active exactly when the
-	 * scatter-gather transfer starts.
-	 */
-	vb->state = VIDEOBUF_ACTIVE;
-
-	err = omap24xxcam_sgdma_queue(&fh->cam->sgdma,
-				      videobuf_to_dma(vb)->sglist,
-				      videobuf_to_dma(vb)->sglen, vb->size,
-				      omap24xxcam_vbq_complete, vb);
-
-	if (!err) {
-		spin_lock_irqsave(&cam->core_enable_disable_lock, flags);
-		if (++cam->sgdma_in_queue == 1
-		    && !atomic_read(&cam->in_reset))
-			omap24xxcam_core_enable(cam);
-		spin_unlock_irqrestore(&cam->core_enable_disable_lock, flags);
-	} else {
-		/*
-		 * Oops. We're not supposed to get any errors here.
-		 * The only way we could get an error is if we ran out
-		 * of scatter-gather DMA slots, but we are supposed to
-		 * have at least as many scatter-gather DMA slots as
-		 * video buffers so that can't happen.
-		 */
-		dev_err(cam->dev, "failed to queue a video buffer for dma!\n");
-		dev_err(cam->dev, "likely a bug in the driver!\n");
-		vb->state = state;
-	}
-}
-
-static struct videobuf_queue_ops omap24xxcam_vbq_ops = {
-	.buf_setup   = omap24xxcam_vbq_setup,
-	.buf_prepare = omap24xxcam_vbq_prepare,
-	.buf_queue   = omap24xxcam_vbq_queue,
-	.buf_release = omap24xxcam_vbq_release,
-};
-
-/*
- *
- * OMAP main camera system
- *
- */
-
-/*
- * Reset camera block to power-on state.
- */
-static void omap24xxcam_poweron_reset(struct omap24xxcam_device *cam)
-{
-	int max_loop = RESET_TIMEOUT_NS;
-
-	/* Reset whole camera subsystem */
-	omap24xxcam_reg_out(cam->mmio_base,
-			    CAM_SYSCONFIG,
-			    CAM_SYSCONFIG_SOFTRESET);
-
-	/* Wait till it's finished */
-	while (!(omap24xxcam_reg_in(cam->mmio_base, CAM_SYSSTATUS)
-		 & CAM_SYSSTATUS_RESETDONE)
-	       && --max_loop) {
-		ndelay(1);
-	}
-
-	if (!(omap24xxcam_reg_in(cam->mmio_base, CAM_SYSSTATUS)
-	      & CAM_SYSSTATUS_RESETDONE))
-		dev_err(cam->dev, "camera soft reset timeout\n");
-}
-
-/*
- * (Re)initialise the camera block.
- */
-static void omap24xxcam_hwinit(struct omap24xxcam_device *cam)
-{
-	omap24xxcam_poweron_reset(cam);
-
-	/* set the camera subsystem autoidle bit */
-	omap24xxcam_reg_out(cam->mmio_base, CAM_SYSCONFIG,
-			    CAM_SYSCONFIG_AUTOIDLE);
-
-	/* set the camera MMU autoidle bit */
-	omap24xxcam_reg_out(cam->mmio_base,
-			    CAMMMU_REG_OFFSET + CAMMMU_SYSCONFIG,
-			    CAMMMU_SYSCONFIG_AUTOIDLE);
-
-	omap24xxcam_core_hwinit(cam);
-
-	omap24xxcam_dma_hwinit(&cam->sgdma.dma);
-}
-
-/*
- * Callback for dma transfer stalling.
- */
-static void omap24xxcam_stalled_dma_reset(unsigned long data)
-{
-	struct omap24xxcam_device *cam = (struct omap24xxcam_device *)data;
-
-	if (!atomic_read(&cam->in_reset)) {
-		dev_dbg(cam->dev, "dma stalled, resetting camera\n");
-		omap24xxcam_reset(cam);
-	}
-}
-
-/*
- * Stop capture. Mark we're doing a reset, stop DMA transfers and
- * core. (No new scatter-gather transfers will be queued whilst
- * in_reset is non-zero.)
- *
- * If omap24xxcam_capture_stop is called from several places at
- * once, only the first call will have an effect. Similarly, the last
- * call omap24xxcam_streaming_cont will have effect.
- *
- * Serialisation is ensured by using cam->core_enable_disable_lock.
- */
-static void omap24xxcam_capture_stop(struct omap24xxcam_device *cam)
-{
-	unsigned long flags;
-
-	spin_lock_irqsave(&cam->core_enable_disable_lock, flags);
-
-	if (atomic_inc_return(&cam->in_reset) != 1) {
-		spin_unlock_irqrestore(&cam->core_enable_disable_lock, flags);
-		return;
-	}
-
-	omap24xxcam_core_disable(cam);
-
-	spin_unlock_irqrestore(&cam->core_enable_disable_lock, flags);
-
-	omap24xxcam_sgdma_sync(&cam->sgdma);
-}
-
-/*
- * Reset and continue streaming.
- *
- * Note: Resetting the camera FIFO via the CC_RST bit in the CC_CTRL
- * register is supposed to be sufficient to recover from a camera
- * interface error, but it doesn't seem to be enough. If we only do
- * that then subsequent image captures are out of sync by either one
- * or two times DMA_THRESHOLD bytes. Resetting and re-initializing the
- * entire camera subsystem prevents the problem with frame
- * synchronization.
- */
-static void omap24xxcam_capture_cont(struct omap24xxcam_device *cam)
-{
-	unsigned long flags;
-
-	spin_lock_irqsave(&cam->core_enable_disable_lock, flags);
-
-	if (atomic_read(&cam->in_reset) != 1)
-		goto out;
-
-	omap24xxcam_hwinit(cam);
-
-	omap24xxcam_sensor_if_enable(cam);
-
-	omap24xxcam_sgdma_process(&cam->sgdma);
-
-	if (cam->sgdma_in_queue)
-		omap24xxcam_core_enable(cam);
-
-out:
-	atomic_dec(&cam->in_reset);
-	spin_unlock_irqrestore(&cam->core_enable_disable_lock, flags);
-}
-
-static ssize_t
-omap24xxcam_streaming_show(struct device *dev, struct device_attribute *attr,
-		char *buf)
-{
-	struct omap24xxcam_device *cam = dev_get_drvdata(dev);
-
-	return sprintf(buf, "%s\n", cam->streaming ?  "active" : "inactive");
-}
-static DEVICE_ATTR(streaming, S_IRUGO, omap24xxcam_streaming_show, NULL);
-
-/*
- * Stop capture and restart it. I.e. reset the camera during use.
- */
-static void omap24xxcam_reset(struct omap24xxcam_device *cam)
-{
-	omap24xxcam_capture_stop(cam);
-	omap24xxcam_capture_cont(cam);
-}
-
-/*
- * The main interrupt handler.
- */
-static irqreturn_t omap24xxcam_isr(int irq, void *arg)
-{
-	struct omap24xxcam_device *cam = (struct omap24xxcam_device *)arg;
-	u32 irqstatus;
-	unsigned int irqhandled = 0;
-
-	irqstatus = omap24xxcam_reg_in(cam->mmio_base, CAM_IRQSTATUS);
-
-	if (irqstatus &
-	    (CAM_IRQSTATUS_DMA_IRQ2 | CAM_IRQSTATUS_DMA_IRQ1
-	     | CAM_IRQSTATUS_DMA_IRQ0)) {
-		omap24xxcam_dma_isr(&cam->sgdma.dma);
-		irqhandled = 1;
-	}
-	if (irqstatus & CAM_IRQSTATUS_CC_IRQ) {
-		omap24xxcam_core_isr(cam);
-		irqhandled = 1;
-	}
-	if (irqstatus & CAM_IRQSTATUS_MMU_IRQ)
-		dev_err(cam->dev, "unhandled camera MMU interrupt!\n");
-
-	return IRQ_RETVAL(irqhandled);
-}
-
-/*
- *
- * Sensor handling.
- *
- */
-
-/*
- * Enable the external sensor interface. Try to negotiate interface
- * parameters with the sensor and start using the new ones. The calls
- * to sensor_if_enable and sensor_if_disable need not to be balanced.
- */
-static int omap24xxcam_sensor_if_enable(struct omap24xxcam_device *cam)
-{
-	int rval;
-	struct v4l2_ifparm p;
-
-	rval = vidioc_int_g_ifparm(cam->sdev, &p);
-	if (rval) {
-		dev_err(cam->dev, "vidioc_int_g_ifparm failed with %d\n", rval);
-		return rval;
-	}
-
-	cam->if_type = p.if_type;
-
-	cam->cc_ctrl = CC_CTRL_CC_EN;
-
-	switch (p.if_type) {
-	case V4L2_IF_TYPE_BT656:
-		if (p.u.bt656.frame_start_on_rising_vs)
-			cam->cc_ctrl |= CC_CTRL_NOBT_SYNCHRO;
-		if (p.u.bt656.bt_sync_correct)
-			cam->cc_ctrl |= CC_CTRL_BT_CORRECT;
-		if (p.u.bt656.swap)
-			cam->cc_ctrl |= CC_CTRL_PAR_ORDERCAM;
-		if (p.u.bt656.latch_clk_inv)
-			cam->cc_ctrl |= CC_CTRL_PAR_CLK_POL;
-		if (p.u.bt656.nobt_hs_inv)
-			cam->cc_ctrl |= CC_CTRL_NOBT_HS_POL;
-		if (p.u.bt656.nobt_vs_inv)
-			cam->cc_ctrl |= CC_CTRL_NOBT_VS_POL;
-
-		switch (p.u.bt656.mode) {
-		case V4L2_IF_TYPE_BT656_MODE_NOBT_8BIT:
-			cam->cc_ctrl |= CC_CTRL_PAR_MODE_NOBT8;
-			break;
-		case V4L2_IF_TYPE_BT656_MODE_NOBT_10BIT:
-			cam->cc_ctrl |= CC_CTRL_PAR_MODE_NOBT10;
-			break;
-		case V4L2_IF_TYPE_BT656_MODE_NOBT_12BIT:
-			cam->cc_ctrl |= CC_CTRL_PAR_MODE_NOBT12;
-			break;
-		case V4L2_IF_TYPE_BT656_MODE_BT_8BIT:
-			cam->cc_ctrl |= CC_CTRL_PAR_MODE_BT8;
-			break;
-		case V4L2_IF_TYPE_BT656_MODE_BT_10BIT:
-			cam->cc_ctrl |= CC_CTRL_PAR_MODE_BT10;
-			break;
-		default:
-			dev_err(cam->dev,
-				"bt656 interface mode %d not supported\n",
-				p.u.bt656.mode);
-			return -EINVAL;
-		}
-		/*
-		 * The clock rate that the sensor wants has changed.
-		 * We have to adjust the xclk from OMAP 2 side to
-		 * match the sensor's wish as closely as possible.
-		 */
-		if (p.u.bt656.clock_curr != cam->if_u.bt656.xclk) {
-			u32 xclk = p.u.bt656.clock_curr;
-			u32 divisor;
-
-			if (xclk == 0)
-				return -EINVAL;
-
-			if (xclk > CAM_MCLK)
-				xclk = CAM_MCLK;
-
-			divisor = CAM_MCLK / xclk;
-			if (divisor * xclk < CAM_MCLK)
-				divisor++;
-			if (CAM_MCLK / divisor < p.u.bt656.clock_min
-			    && divisor > 1)
-				divisor--;
-			if (divisor > 30)
-				divisor = 30;
-
-			xclk = CAM_MCLK / divisor;
-
-			if (xclk < p.u.bt656.clock_min
-			    || xclk > p.u.bt656.clock_max)
-				return -EINVAL;
-
-			cam->if_u.bt656.xclk = xclk;
-		}
-		omap24xxcam_core_xclk_set(cam, cam->if_u.bt656.xclk);
-		break;
-	default:
-		/* FIXME: how about other interfaces? */
-		dev_err(cam->dev, "interface type %d not supported\n",
-			p.if_type);
-		return -EINVAL;
-	}
-
-	return 0;
-}
-
-static void omap24xxcam_sensor_if_disable(const struct omap24xxcam_device *cam)
-{
-	switch (cam->if_type) {
-	case V4L2_IF_TYPE_BT656:
-		omap24xxcam_core_xclk_set(cam, 0);
-		break;
-	}
-}
-
-/*
- * Initialise the sensor hardware.
- */
-static int omap24xxcam_sensor_init(struct omap24xxcam_device *cam)
-{
-	int err = 0;
-	struct v4l2_int_device *sdev = cam->sdev;
-
-	omap24xxcam_clock_on(cam);
-	err = omap24xxcam_sensor_if_enable(cam);
-	if (err) {
-		dev_err(cam->dev, "sensor interface could not be enabled at "
-			"initialisation, %d\n", err);
-		cam->sdev = NULL;
-		goto out;
-	}
-
-	/* power up sensor during sensor initialization */
-	vidioc_int_s_power(sdev, 1);
-
-	err = vidioc_int_dev_init(sdev);
-	if (err) {
-		dev_err(cam->dev, "cannot initialize sensor, error %d\n", err);
-		/* Sensor init failed --- it's nonexistent to us! */
-		cam->sdev = NULL;
-		goto out;
-	}
-
-	dev_info(cam->dev, "sensor is %s\n", sdev->name);
-
-out:
-	omap24xxcam_sensor_if_disable(cam);
-	omap24xxcam_clock_off(cam);
-
-	vidioc_int_s_power(sdev, 0);
-
-	return err;
-}
-
-static void omap24xxcam_sensor_exit(struct omap24xxcam_device *cam)
-{
-	if (cam->sdev)
-		vidioc_int_dev_exit(cam->sdev);
-}
-
-static void omap24xxcam_sensor_disable(struct omap24xxcam_device *cam)
-{
-	omap24xxcam_sensor_if_disable(cam);
-	omap24xxcam_clock_off(cam);
-	vidioc_int_s_power(cam->sdev, 0);
-}
-
-/*
- * Power-up and configure camera sensor. It's ready for capturing now.
- */
-static int omap24xxcam_sensor_enable(struct omap24xxcam_device *cam)
-{
-	int rval;
-
-	omap24xxcam_clock_on(cam);
-
-	omap24xxcam_sensor_if_enable(cam);
-
-	rval = vidioc_int_s_power(cam->sdev, 1);
-	if (rval)
-		goto out;
-
-	rval = vidioc_int_init(cam->sdev);
-	if (rval)
-		goto out;
-
-	return 0;
-
-out:
-	omap24xxcam_sensor_disable(cam);
-
-	return rval;
-}
-
-static void omap24xxcam_sensor_reset_work(struct work_struct *work)
-{
-	struct omap24xxcam_device *cam =
-		container_of(work, struct omap24xxcam_device,
-			     sensor_reset_work);
-
-	if (atomic_read(&cam->reset_disable))
-		return;
-
-	omap24xxcam_capture_stop(cam);
-
-	if (vidioc_int_reset(cam->sdev) == 0) {
-		vidioc_int_init(cam->sdev);
-	} else {
-		/* Can't reset it by vidioc_int_reset. */
-		omap24xxcam_sensor_disable(cam);
-		omap24xxcam_sensor_enable(cam);
-	}
-
-	omap24xxcam_capture_cont(cam);
-}
-
-/*
- *
- * IOCTL interface.
- *
- */
-
-static int vidioc_querycap(struct file *file, void *fh,
-			   struct v4l2_capability *cap)
-{
-	struct omap24xxcam_fh *ofh = fh;
-	struct omap24xxcam_device *cam = ofh->cam;
-
-	strlcpy(cap->driver, CAM_NAME, sizeof(cap->driver));
-	strlcpy(cap->card, cam->vfd->name, sizeof(cap->card));
-	cap->capabilities = V4L2_CAP_VIDEO_CAPTURE | V4L2_CAP_STREAMING;
-
-	return 0;
-}
-
-static int vidioc_enum_fmt_vid_cap(struct file *file, void *fh,
-				   struct v4l2_fmtdesc *f)
-{
-	struct omap24xxcam_fh *ofh = fh;
-	struct omap24xxcam_device *cam = ofh->cam;
-	int rval;
-
-	rval = vidioc_int_enum_fmt_cap(cam->sdev, f);
-
-	return rval;
-}
-
-static int vidioc_g_fmt_vid_cap(struct file *file, void *fh,
-				struct v4l2_format *f)
-{
-	struct omap24xxcam_fh *ofh = fh;
-	struct omap24xxcam_device *cam = ofh->cam;
-	int rval;
-
-	mutex_lock(&cam->mutex);
-	rval = vidioc_int_g_fmt_cap(cam->sdev, f);
-	mutex_unlock(&cam->mutex);
-
-	return rval;
-}
-
-static int vidioc_s_fmt_vid_cap(struct file *file, void *fh,
-				struct v4l2_format *f)
-{
-	struct omap24xxcam_fh *ofh = fh;
-	struct omap24xxcam_device *cam = ofh->cam;
-	int rval;
-
-	mutex_lock(&cam->mutex);
-	if (cam->streaming) {
-		rval = -EBUSY;
-		goto out;
-	}
-
-	rval = vidioc_int_s_fmt_cap(cam->sdev, f);
-
-out:
-	mutex_unlock(&cam->mutex);
-
-	if (!rval) {
-		mutex_lock(&ofh->vbq.vb_lock);
-		ofh->pix = f->fmt.pix;
-		mutex_unlock(&ofh->vbq.vb_lock);
-	}
-
-	memset(f, 0, sizeof(*f));
-	vidioc_g_fmt_vid_cap(file, fh, f);
-
-	return rval;
-}
-
-static int vidioc_try_fmt_vid_cap(struct file *file, void *fh,
-				  struct v4l2_format *f)
-{
-	struct omap24xxcam_fh *ofh = fh;
-	struct omap24xxcam_device *cam = ofh->cam;
-	int rval;
-
-	mutex_lock(&cam->mutex);
-	rval = vidioc_int_try_fmt_cap(cam->sdev, f);
-	mutex_unlock(&cam->mutex);
-
-	return rval;
-}
-
-static int vidioc_reqbufs(struct file *file, void *fh,
-			  struct v4l2_requestbuffers *b)
-{
-	struct omap24xxcam_fh *ofh = fh;
-	struct omap24xxcam_device *cam = ofh->cam;
-	int rval;
-
-	mutex_lock(&cam->mutex);
-	if (cam->streaming) {
-		mutex_unlock(&cam->mutex);
-		return -EBUSY;
-	}
-
-	omap24xxcam_vbq_free_mmap_buffers(&ofh->vbq);
-	mutex_unlock(&cam->mutex);
-
-	rval = videobuf_reqbufs(&ofh->vbq, b);
-
-	/*
-	 * Either videobuf_reqbufs failed or the buffers are not
-	 * memory-mapped (which would need special attention).
-	 */
-	if (rval < 0 || b->memory != V4L2_MEMORY_MMAP)
-		goto out;
-
-	rval = omap24xxcam_vbq_alloc_mmap_buffers(&ofh->vbq, rval);
-	if (rval)
-		omap24xxcam_vbq_free_mmap_buffers(&ofh->vbq);
-
-out:
-	return rval;
-}
-
-static int vidioc_querybuf(struct file *file, void *fh,
-			   struct v4l2_buffer *b)
-{
-	struct omap24xxcam_fh *ofh = fh;
-
-	return videobuf_querybuf(&ofh->vbq, b);
-}
-
-static int vidioc_qbuf(struct file *file, void *fh, struct v4l2_buffer *b)
-{
-	struct omap24xxcam_fh *ofh = fh;
-
-	return videobuf_qbuf(&ofh->vbq, b);
-}
-
-static int vidioc_dqbuf(struct file *file, void *fh, struct v4l2_buffer *b)
-{
-	struct omap24xxcam_fh *ofh = fh;
-	struct omap24xxcam_device *cam = ofh->cam;
-	struct videobuf_buffer *vb;
-	int rval;
-
-videobuf_dqbuf_again:
-	rval = videobuf_dqbuf(&ofh->vbq, b, file->f_flags & O_NONBLOCK);
-	if (rval)
-		goto out;
-
-	vb = ofh->vbq.bufs[b->index];
-
-	mutex_lock(&cam->mutex);
-	/* _needs_reset returns -EIO if reset is required. */
-	rval = vidioc_int_g_needs_reset(cam->sdev, (void *)vb->baddr);
-	mutex_unlock(&cam->mutex);
-	if (rval == -EIO)
-		schedule_work(&cam->sensor_reset_work);
-	else
-		rval = 0;
-
-out:
-	/*
-	 * This is a hack. We don't want to show -EIO to the user
-	 * space. Requeue the buffer and try again if we're not doing
-	 * this in non-blocking mode.
-	 */
-	if (rval == -EIO) {
-		videobuf_qbuf(&ofh->vbq, b);
-		if (!(file->f_flags & O_NONBLOCK))
-			goto videobuf_dqbuf_again;
-		/*
-		 * We don't have a videobuf_buffer now --- maybe next
-		 * time...
-		 */
-		rval = -EAGAIN;
-	}
-
-	return rval;
-}
-
-static int vidioc_streamon(struct file *file, void *fh, enum v4l2_buf_type i)
-{
-	struct omap24xxcam_fh *ofh = fh;
-	struct omap24xxcam_device *cam = ofh->cam;
-	int rval;
-
-	mutex_lock(&cam->mutex);
-	if (cam->streaming) {
-		rval = -EBUSY;
-		goto out;
-	}
-
-	rval = omap24xxcam_sensor_if_enable(cam);
-	if (rval) {
-		dev_dbg(cam->dev, "vidioc_int_g_ifparm failed\n");
-		goto out;
-	}
-
-	rval = videobuf_streamon(&ofh->vbq);
-	if (!rval) {
-		cam->streaming = file;
-		sysfs_notify(&cam->dev->kobj, NULL, "streaming");
-	}
-
-out:
-	mutex_unlock(&cam->mutex);
-
-	return rval;
-}
-
-static int vidioc_streamoff(struct file *file, void *fh, enum v4l2_buf_type i)
-{
-	struct omap24xxcam_fh *ofh = fh;
-	struct omap24xxcam_device *cam = ofh->cam;
-	struct videobuf_queue *q = &ofh->vbq;
-	int rval;
-
-	atomic_inc(&cam->reset_disable);
-
-	flush_work(&cam->sensor_reset_work);
-
-	rval = videobuf_streamoff(q);
-	if (!rval) {
-		mutex_lock(&cam->mutex);
-		cam->streaming = NULL;
-		mutex_unlock(&cam->mutex);
-		sysfs_notify(&cam->dev->kobj, NULL, "streaming");
-	}
-
-	atomic_dec(&cam->reset_disable);
-
-	return rval;
-}
-
-static int vidioc_enum_input(struct file *file, void *fh,
-			     struct v4l2_input *inp)
-{
-	if (inp->index > 0)
-		return -EINVAL;
-
-	strlcpy(inp->name, "camera", sizeof(inp->name));
-	inp->type = V4L2_INPUT_TYPE_CAMERA;
-
-	return 0;
-}
-
-static int vidioc_g_input(struct file *file, void *fh, unsigned int *i)
-{
-	*i = 0;
-
-	return 0;
-}
-
-static int vidioc_s_input(struct file *file, void *fh, unsigned int i)
-{
-	if (i > 0)
-		return -EINVAL;
-
-	return 0;
-}
-
-static int vidioc_queryctrl(struct file *file, void *fh,
-			    struct v4l2_queryctrl *a)
-{
-	struct omap24xxcam_fh *ofh = fh;
-	struct omap24xxcam_device *cam = ofh->cam;
-	int rval;
-
-	rval = vidioc_int_queryctrl(cam->sdev, a);
-
-	return rval;
-}
-
-static int vidioc_g_ctrl(struct file *file, void *fh,
-			 struct v4l2_control *a)
-{
-	struct omap24xxcam_fh *ofh = fh;
-	struct omap24xxcam_device *cam = ofh->cam;
-	int rval;
-
-	mutex_lock(&cam->mutex);
-	rval = vidioc_int_g_ctrl(cam->sdev, a);
-	mutex_unlock(&cam->mutex);
-
-	return rval;
-}
-
-static int vidioc_s_ctrl(struct file *file, void *fh,
-			 struct v4l2_control *a)
-{
-	struct omap24xxcam_fh *ofh = fh;
-	struct omap24xxcam_device *cam = ofh->cam;
-	int rval;
-
-	mutex_lock(&cam->mutex);
-	rval = vidioc_int_s_ctrl(cam->sdev, a);
-	mutex_unlock(&cam->mutex);
-
-	return rval;
-}
-
-static int vidioc_g_parm(struct file *file, void *fh,
-			 struct v4l2_streamparm *a) {
-	struct omap24xxcam_fh *ofh = fh;
-	struct omap24xxcam_device *cam = ofh->cam;
-	int rval;
-
-	mutex_lock(&cam->mutex);
-	rval = vidioc_int_g_parm(cam->sdev, a);
-	mutex_unlock(&cam->mutex);
-
-	return rval;
-}
-
-static int vidioc_s_parm(struct file *file, void *fh,
-			 struct v4l2_streamparm *a)
-{
-	struct omap24xxcam_fh *ofh = fh;
-	struct omap24xxcam_device *cam = ofh->cam;
-	struct v4l2_streamparm old_streamparm;
-	int rval;
-
-	mutex_lock(&cam->mutex);
-	if (cam->streaming) {
-		rval = -EBUSY;
-		goto out;
-	}
-
-	old_streamparm.type = V4L2_BUF_TYPE_VIDEO_CAPTURE;
-	rval = vidioc_int_g_parm(cam->sdev, &old_streamparm);
-	if (rval)
-		goto out;
-
-	rval = vidioc_int_s_parm(cam->sdev, a);
-	if (rval)
-		goto out;
-
-	rval = omap24xxcam_sensor_if_enable(cam);
-	/*
-	 * Revert to old streaming parameters if enabling sensor
-	 * interface with the new ones failed.
-	 */
-	if (rval)
-		vidioc_int_s_parm(cam->sdev, &old_streamparm);
-
-out:
-	mutex_unlock(&cam->mutex);
-
-	return rval;
-}
-
-/*
- *
- * File operations.
- *
- */
-
-static unsigned int omap24xxcam_poll(struct file *file,
-				     struct poll_table_struct *wait)
-{
-	struct omap24xxcam_fh *fh = file->private_data;
-	struct omap24xxcam_device *cam = fh->cam;
-	struct videobuf_buffer *vb;
-
-	mutex_lock(&cam->mutex);
-	if (cam->streaming != file) {
-		mutex_unlock(&cam->mutex);
-		return POLLERR;
-	}
-	mutex_unlock(&cam->mutex);
-
-	mutex_lock(&fh->vbq.vb_lock);
-	if (list_empty(&fh->vbq.stream)) {
-		mutex_unlock(&fh->vbq.vb_lock);
-		return POLLERR;
-	}
-	vb = list_entry(fh->vbq.stream.next, struct videobuf_buffer, stream);
-	mutex_unlock(&fh->vbq.vb_lock);
-
-	poll_wait(file, &vb->done, wait);
-
-	if (vb->state == VIDEOBUF_DONE || vb->state == VIDEOBUF_ERROR)
-		return POLLIN | POLLRDNORM;
-
-	return 0;
-}
-
-static int omap24xxcam_mmap_buffers(struct file *file,
-				    struct vm_area_struct *vma)
-{
-	struct omap24xxcam_fh *fh = file->private_data;
-	struct omap24xxcam_device *cam = fh->cam;
-	struct videobuf_queue *vbq = &fh->vbq;
-	unsigned int first, last, size, i, j;
-	int err = 0;
-
-	mutex_lock(&cam->mutex);
-	if (cam->streaming) {
-		mutex_unlock(&cam->mutex);
-		return -EBUSY;
-	}
-	mutex_unlock(&cam->mutex);
-	mutex_lock(&vbq->vb_lock);
-
-	/* look for first buffer to map */
-	for (first = 0; first < VIDEO_MAX_FRAME; first++) {
-		if (NULL == vbq->bufs[first])
-			continue;
-		if (V4L2_MEMORY_MMAP != vbq->bufs[first]->memory)
-			continue;
-		if (vbq->bufs[first]->boff == (vma->vm_pgoff << PAGE_SHIFT))
-			break;
-	}
-
-	/* look for last buffer to map */
-	for (size = 0, last = first; last < VIDEO_MAX_FRAME; last++) {
-		if (NULL == vbq->bufs[last])
-			continue;
-		if (V4L2_MEMORY_MMAP != vbq->bufs[last]->memory)
-			continue;
-		size += vbq->bufs[last]->bsize;
-		if (size == (vma->vm_end - vma->vm_start))
-			break;
-	}
-
-	size = 0;
-	for (i = first; i <= last && i < VIDEO_MAX_FRAME; i++) {
-		struct videobuf_dmabuf *dma = videobuf_to_dma(vbq->bufs[i]);
-
-		for (j = 0; j < dma->sglen; j++) {
-			err = remap_pfn_range(
-				vma, vma->vm_start + size,
-				page_to_pfn(sg_page(&dma->sglist[j])),
-				sg_dma_len(&dma->sglist[j]), vma->vm_page_prot);
-			if (err)
-				goto out;
-			size += sg_dma_len(&dma->sglist[j]);
-		}
-	}
-
-out:
-	mutex_unlock(&vbq->vb_lock);
-
-	return err;
-}
-
-static int omap24xxcam_mmap(struct file *file, struct vm_area_struct *vma)
-{
-	struct omap24xxcam_fh *fh = file->private_data;
-	int rval;
-
-	/* let the video-buf mapper check arguments and set-up structures */
-	rval = videobuf_mmap_mapper(&fh->vbq, vma);
-	if (rval)
-		return rval;
-
-	vma->vm_page_prot = pgprot_noncached(vma->vm_page_prot);
-
-	/* do mapping to our allocated buffers */
-	rval = omap24xxcam_mmap_buffers(file, vma);
-	/*
-	 * In case of error, free vma->vm_private_data allocated by
-	 * videobuf_mmap_mapper.
-	 */
-	if (rval)
-		kfree(vma->vm_private_data);
-
-	return rval;
-}
-
-static int omap24xxcam_open(struct file *file)
-{
-	struct omap24xxcam_device *cam = omap24xxcam.priv;
-	struct omap24xxcam_fh *fh;
-	struct v4l2_format format;
-
-	if (!cam || !cam->vfd)
-		return -ENODEV;
-
-	fh = kzalloc(sizeof(*fh), GFP_KERNEL);
-	if (fh == NULL)
-		return -ENOMEM;
-
-	mutex_lock(&cam->mutex);
-	if (cam->sdev == NULL || !try_module_get(cam->sdev->module)) {
-		mutex_unlock(&cam->mutex);
-		goto out_try_module_get;
-	}
-
-	if (atomic_inc_return(&cam->users) == 1) {
-		omap24xxcam_hwinit(cam);
-		if (omap24xxcam_sensor_enable(cam)) {
-			mutex_unlock(&cam->mutex);
-			goto out_omap24xxcam_sensor_enable;
-		}
-	}
-	mutex_unlock(&cam->mutex);
-
-	fh->cam = cam;
-	mutex_lock(&cam->mutex);
-	vidioc_int_g_fmt_cap(cam->sdev, &format);
-	mutex_unlock(&cam->mutex);
-	/* FIXME: how about fh->pix when there are more users? */
-	fh->pix = format.fmt.pix;
-
-	file->private_data = fh;
-
-	spin_lock_init(&fh->vbq_lock);
-
-	videobuf_queue_sg_init(&fh->vbq, &omap24xxcam_vbq_ops, NULL,
-				&fh->vbq_lock, V4L2_BUF_TYPE_VIDEO_CAPTURE,
-				V4L2_FIELD_NONE,
-				sizeof(struct videobuf_buffer), fh, NULL);
-
-	return 0;
-
-out_omap24xxcam_sensor_enable:
-	omap24xxcam_poweron_reset(cam);
-	module_put(cam->sdev->module);
-
-out_try_module_get:
-	kfree(fh);
-
-	return -ENODEV;
-}
-
-static int omap24xxcam_release(struct file *file)
-{
-	struct omap24xxcam_fh *fh = file->private_data;
-	struct omap24xxcam_device *cam = fh->cam;
-
-	atomic_inc(&cam->reset_disable);
-
-	flush_work(&cam->sensor_reset_work);
-
-	/* stop streaming capture */
-	videobuf_streamoff(&fh->vbq);
-
-	mutex_lock(&cam->mutex);
-	if (cam->streaming == file) {
-		cam->streaming = NULL;
-		mutex_unlock(&cam->mutex);
-		sysfs_notify(&cam->dev->kobj, NULL, "streaming");
-	} else {
-		mutex_unlock(&cam->mutex);
-	}
-
-	atomic_dec(&cam->reset_disable);
-
-	omap24xxcam_vbq_free_mmap_buffers(&fh->vbq);
-
-	/*
-	 * Make sure the reset work we might have scheduled is not
-	 * pending! It may be run *only* if we have users. (And it may
-	 * not be scheduled anymore since streaming is already
-	 * disabled.)
-	 */
-	flush_work(&cam->sensor_reset_work);
-
-	mutex_lock(&cam->mutex);
-	if (atomic_dec_return(&cam->users) == 0) {
-		omap24xxcam_sensor_disable(cam);
-		omap24xxcam_poweron_reset(cam);
-	}
-	mutex_unlock(&cam->mutex);
-
-	file->private_data = NULL;
-
-	module_put(cam->sdev->module);
-	kfree(fh);
-
-	return 0;
-}
-
-static struct v4l2_file_operations omap24xxcam_fops = {
-	.ioctl	 = video_ioctl2,
-	.poll	 = omap24xxcam_poll,
-	.mmap	 = omap24xxcam_mmap,
-	.open	 = omap24xxcam_open,
-	.release = omap24xxcam_release,
-};
-
-/*
- *
- * Power management.
- *
- */
-
-#ifdef CONFIG_PM
-static int omap24xxcam_suspend(struct platform_device *pdev, pm_message_t state)
-{
-	struct omap24xxcam_device *cam = platform_get_drvdata(pdev);
-
-	if (atomic_read(&cam->users) == 0)
-		return 0;
-
-	if (!atomic_read(&cam->reset_disable))
-		omap24xxcam_capture_stop(cam);
-
-	omap24xxcam_sensor_disable(cam);
-	omap24xxcam_poweron_reset(cam);
-
-	return 0;
-}
-
-static int omap24xxcam_resume(struct platform_device *pdev)
-{
-	struct omap24xxcam_device *cam = platform_get_drvdata(pdev);
-
-	if (atomic_read(&cam->users) == 0)
-		return 0;
-
-	omap24xxcam_hwinit(cam);
-	omap24xxcam_sensor_enable(cam);
-
-	if (!atomic_read(&cam->reset_disable))
-		omap24xxcam_capture_cont(cam);
-
-	return 0;
-}
-#endif /* CONFIG_PM */
-
-static const struct v4l2_ioctl_ops omap24xxcam_ioctl_fops = {
-	.vidioc_querycap	= vidioc_querycap,
-	.vidioc_enum_fmt_vid_cap	= vidioc_enum_fmt_vid_cap,
-	.vidioc_g_fmt_vid_cap	= vidioc_g_fmt_vid_cap,
-	.vidioc_s_fmt_vid_cap	= vidioc_s_fmt_vid_cap,
-	.vidioc_try_fmt_vid_cap	= vidioc_try_fmt_vid_cap,
-	.vidioc_reqbufs		= vidioc_reqbufs,
-	.vidioc_querybuf	= vidioc_querybuf,
-	.vidioc_qbuf		= vidioc_qbuf,
-	.vidioc_dqbuf		= vidioc_dqbuf,
-	.vidioc_streamon	= vidioc_streamon,
-	.vidioc_streamoff	= vidioc_streamoff,
-	.vidioc_enum_input	= vidioc_enum_input,
-	.vidioc_g_input		= vidioc_g_input,
-	.vidioc_s_input		= vidioc_s_input,
-	.vidioc_queryctrl	= vidioc_queryctrl,
-	.vidioc_g_ctrl		= vidioc_g_ctrl,
-	.vidioc_s_ctrl		= vidioc_s_ctrl,
-	.vidioc_g_parm		= vidioc_g_parm,
-	.vidioc_s_parm		= vidioc_s_parm,
-};
-
-/*
- *
- * Camera device (i.e. /dev/video).
- *
- */
-
-static int omap24xxcam_device_register(struct v4l2_int_device *s)
-{
-	struct omap24xxcam_device *cam = s->u.slave->master->priv;
-	struct video_device *vfd;
-	int rval;
-
-	/* We already have a slave. */
-	if (cam->sdev)
-		return -EBUSY;
-
-	cam->sdev = s;
-
-	if (device_create_file(cam->dev, &dev_attr_streaming) != 0) {
-		dev_err(cam->dev, "could not register sysfs entry\n");
-		rval = -EBUSY;
-		goto err;
-	}
-
-	/* initialize the video_device struct */
-	vfd = cam->vfd = video_device_alloc();
-	if (!vfd) {
-		dev_err(cam->dev, "could not allocate video device struct\n");
-		rval = -ENOMEM;
-		goto err;
-	}
-	vfd->release = video_device_release;
-
-	vfd->v4l2_dev = &cam->v4l2_dev;
-
-	strlcpy(vfd->name, CAM_NAME, sizeof(vfd->name));
-	vfd->fops		 = &omap24xxcam_fops;
-	vfd->ioctl_ops		 = &omap24xxcam_ioctl_fops;
-
-	omap24xxcam_hwinit(cam);
-
-	rval = omap24xxcam_sensor_init(cam);
-	if (rval)
-		goto err;
-
-	if (video_register_device(vfd, VFL_TYPE_GRABBER, video_nr) < 0) {
-		dev_err(cam->dev, "could not register V4L device\n");
-		rval = -EBUSY;
-		goto err;
-	}
-
-	omap24xxcam_poweron_reset(cam);
-
-	dev_info(cam->dev, "registered device %s\n",
-		 video_device_node_name(vfd));
-
-	return 0;
-
-err:
-	omap24xxcam_device_unregister(s);
-
-	return rval;
-}
-
-static void omap24xxcam_device_unregister(struct v4l2_int_device *s)
-{
-	struct omap24xxcam_device *cam = s->u.slave->master->priv;
-
-	omap24xxcam_sensor_exit(cam);
-
-	if (cam->vfd) {
-		if (!video_is_registered(cam->vfd)) {
-			/*
-			 * The device was never registered, so release the
-			 * video_device struct directly.
-			 */
-			video_device_release(cam->vfd);
-		} else {
-			/*
-			 * The unregister function will release the
-			 * video_device struct as well as
-			 * unregistering it.
-			 */
-			video_unregister_device(cam->vfd);
-		}
-		cam->vfd = NULL;
-	}
-
-	device_remove_file(cam->dev, &dev_attr_streaming);
-
-	cam->sdev = NULL;
-}
-
-static struct v4l2_int_master omap24xxcam_master = {
-	.attach = omap24xxcam_device_register,
-	.detach = omap24xxcam_device_unregister,
-};
-
-static struct v4l2_int_device omap24xxcam = {
-	.module	= THIS_MODULE,
-	.name	= CAM_NAME,
-	.type	= v4l2_int_type_master,
-	.u	= {
-		.master = &omap24xxcam_master
-	},
-};
-
-/*
- *
- * Driver initialisation and deinitialisation.
- *
- */
-
-static int omap24xxcam_probe(struct platform_device *pdev)
-{
-	struct omap24xxcam_device *cam;
-	struct resource *mem;
-	int irq;
-
-	cam = kzalloc(sizeof(*cam), GFP_KERNEL);
-	if (!cam) {
-		dev_err(&pdev->dev, "could not allocate memory\n");
-		goto err;
-	}
-
-	platform_set_drvdata(pdev, cam);
-
-	cam->dev = &pdev->dev;
-
-	if (v4l2_device_register(&pdev->dev, &cam->v4l2_dev)) {
-		dev_err(&pdev->dev, "v4l2_device_register failed\n");
-		goto err;
-	}
-
-	/*
-	 * Impose a lower limit on the amount of memory allocated for
-	 * capture. We require at least enough memory to double-buffer
-	 * QVGA (300KB).
-	 */
-	if (capture_mem < 320 * 240 * 2 * 2)
-		capture_mem = 320 * 240 * 2 * 2;
-	cam->capture_mem = capture_mem;
-
-	/* request the mem region for the camera registers */
-	mem = platform_get_resource(pdev, IORESOURCE_MEM, 0);
-	if (!mem) {
-		dev_err(cam->dev, "no mem resource?\n");
-		goto err;
-	}
-	if (!request_mem_region(mem->start, resource_size(mem), pdev->name)) {
-		dev_err(cam->dev,
-			"cannot reserve camera register I/O region\n");
-		goto err;
-	}
-	cam->mmio_base_phys = mem->start;
-	cam->mmio_size = resource_size(mem);
-
-	/* map the region */
-	cam->mmio_base = ioremap_nocache(cam->mmio_base_phys, cam->mmio_size);
-	if (!cam->mmio_base) {
-		dev_err(cam->dev, "cannot map camera register I/O region\n");
-		goto err;
-	}
-
-	irq = platform_get_irq(pdev, 0);
-	if (irq <= 0) {
-		dev_err(cam->dev, "no irq for camera?\n");
-		goto err;
-	}
-
-	/* install the interrupt service routine */
-	if (request_irq(irq, omap24xxcam_isr, 0, CAM_NAME, cam)) {
-		dev_err(cam->dev,
-			"could not install interrupt service routine\n");
-		goto err;
-	}
-	cam->irq = irq;
-
-	if (omap24xxcam_clock_get(cam))
-		goto err;
-
-	INIT_WORK(&cam->sensor_reset_work, omap24xxcam_sensor_reset_work);
-
-	mutex_init(&cam->mutex);
-	spin_lock_init(&cam->core_enable_disable_lock);
-
-	omap24xxcam_sgdma_init(&cam->sgdma,
-			       cam->mmio_base + CAMDMA_REG_OFFSET,
-			       omap24xxcam_stalled_dma_reset,
-			       (unsigned long)cam);
-
-	omap24xxcam.priv = cam;
-
-	if (v4l2_int_device_register(&omap24xxcam))
-		goto err;
-
-	return 0;
-
-err:
-	omap24xxcam_remove(pdev);
-	return -ENODEV;
-}
-
-static int omap24xxcam_remove(struct platform_device *pdev)
-{
-	struct omap24xxcam_device *cam = platform_get_drvdata(pdev);
-
-	if (!cam)
-		return 0;
-
-	if (omap24xxcam.priv != NULL)
-		v4l2_int_device_unregister(&omap24xxcam);
-	omap24xxcam.priv = NULL;
-
-	omap24xxcam_clock_put(cam);
-
-	if (cam->irq) {
-		free_irq(cam->irq, cam);
-		cam->irq = 0;
-	}
-
-	if (cam->mmio_base) {
-		iounmap((void *)cam->mmio_base);
-		cam->mmio_base = 0;
-	}
-
-	if (cam->mmio_base_phys) {
-		release_mem_region(cam->mmio_base_phys, cam->mmio_size);
-		cam->mmio_base_phys = 0;
-	}
-
-	v4l2_device_unregister(&cam->v4l2_dev);
-
-	kfree(cam);
-
-	return 0;
-}
-
-static struct platform_driver omap24xxcam_driver = {
-	.probe	 = omap24xxcam_probe,
-	.remove	 = omap24xxcam_remove,
-#ifdef CONFIG_PM
-	.suspend = omap24xxcam_suspend,
-	.resume	 = omap24xxcam_resume,
-#endif
-	.driver	 = {
-		.name = CAM_NAME,
-		.owner = THIS_MODULE,
-	},
-};
-
-module_platform_driver(omap24xxcam_driver);
-
-MODULE_AUTHOR("Sakari Ailus <sakari.ailus@nokia.com>");
-MODULE_DESCRIPTION("OMAP24xx Video for Linux camera driver");
-MODULE_LICENSE("GPL");
-MODULE_VERSION(OMAP24XXCAM_VERSION);
-module_param(video_nr, int, 0);
-MODULE_PARM_DESC(video_nr,
-		 "Minor number for video device (-1 ==> auto assign)");
-module_param(capture_mem, int, 0);
-MODULE_PARM_DESC(capture_mem, "Maximum amount of memory for capture "
-		 "buffers (default 4800kiB)");