path: root/target/device/Atmel/arch-avr32/kernel-patches-2.6.24/linux-2.6.24-500-v4l-avr32-isi.patch.cond

diff --git a/include/linux/videodev2.h b/include/linux/videodev2.h
index 441b877..3a85a5e 100644
--- a/include/linux/videodev2.h
+++ b/include/linux/videodev2.h
@@ -298,6 +298,9 @@ struct v4l2_pix_format
 #define V4L2_PIX_FMT_PWC2     v4l2_fourcc('P','W','C','2') /* pwc newer webcam */
 #define V4L2_PIX_FMT_ET61X251 v4l2_fourcc('E','6','2','5') /* ET61X251 compression */
 
+/* Byte-swapped YUYV */
+#define V4L2_PIX_FMT_VYUY     v4l2_fourcc('V','Y','U','Y') /* 16 YUV 4:2:2 */
+#define V4L2_PIX_FMT_YVYU     v4l2_fourcc('Y','V','Y','U') /* 16 YUV 4:2:2 */
 /*
  *	F O R M A T   E N U M E R A T I O N
  */
diff --git a/drivers/media/video/Makefile b/drivers/media/video/Makefile
index 44ccaed..78e38d0 100644
--- a/drivers/media/video/Makefile
+++ b/drivers/media/video/Makefile
@@ -77,6 +77,7 @@ obj-$(CONFIG_VIDEO_HEXIUM_ORION) += hexium_orion.o
 obj-$(CONFIG_VIDEO_HEXIUM_GEMINI) += hexium_gemini.o
 obj-$(CONFIG_VIDEO_DPC) += dpc7146.o
 obj-$(CONFIG_TUNER_3036) += tuner-3036.o
+obj-$(CONFIG_VIDEO_AVR32_ISI) += atmel-isi.o
 
 obj-$(CONFIG_VIDEO_TUNER) += tuner.o
 obj-$(CONFIG_VIDEO_BUF)   += video-buf.o
diff --git a/drivers/media/video/atmel-isi.c b/drivers/media/video/atmel-isi.c
new file mode 100644
index 0000000..a53a3c0
--- /dev/null
+++ b/drivers/media/video/atmel-isi.c
@@ -0,0 +1,1868 @@
+/*
+ * Copyright (c) 2007 Atmel Corporation
+ *
+ * Based on the bttv driver for Bt848 with respective copyright holders
+ *
+ * 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.
+ */
+#define DEBUG
+#include <linux/clk.h>
+#include <linux/completion.h>
+#include <linux/dma-mapping.h>
+#include <linux/fs.h>
+#include <linux/init.h>
+#include <linux/interrupt.h>
+#include <linux/ioctl.h>
+#include <linux/kernel.h>
+#include <linux/mm.h>
+#include <linux/module.h>
+#include <linux/moduleparam.h>
+#include <linux/platform_device.h>
+#include <linux/slab.h>
+#include <linux/version.h>
+#include <linux/videodev2.h>
+#include <linux/wait.h>
+
+#include <linux/kfifo.h>
+
+#include <asm/io.h>
+
+#include <media/v4l2-common.h>
+
+#include "atmel-isi.h"
+
+#define ATMEL_ISI_VERSION	KERNEL_VERSION(0, 1, 0)
+#define ISI_CODEC 0
+
+/* Default ISI capture buffer size */
+#define ISI_CAPTURE_BUFFER_SIZE 800*600*2
+/* Default ISI video frame size */
+#define ISI_VIDEO_BUFFER_SIZE 320*240*2
+/* Default number of ISI video buffers */
+#define ISI_VIDEO_BUFFERS 4
+/* Maximum number of video buffers */
+#define ISI_VIDEO_BUFFERS_MAX 8
+
+/* Interrupt mask for a single capture */
+#define ISI_CAPTURE_MASK (ISI_BIT(SOF) | ISI_BIT(FO_C_EMP))
+
+/* ISI capture buffer size */
+static int capture_buffer_size = ISI_CAPTURE_BUFFER_SIZE;
+/* Number of buffers used for streaming video */
+static int video_buffers = 4;
+static int video_buffer_size = ISI_VIDEO_BUFFER_SIZE;
+
+/* Preview path horizontal size */
+static int prev_hsize = 320;
+/* Preview path vertical size */
+static int prev_vsize = 240;
+/* Scaling factor of the preview path */
+static int prev_decimation_factor = 1;
+
+/* Input image horizontal size */
+static int image_hsize = 320;
+
+/* Input image vertical size */
+static int image_vsize = 240;
+
+/* Frame rate scaler 
+ * 1 = capture every second frame
+ * 2 = capture every third frame
+ * ...
+ * */
+static int frame_rate_scaler = 2;
+
+/* Set this value if we want to pretend a specific V4L2 output format 
+ *  This format is for the capturing interface
+ */ 
+static int capture_v4l2_fmt = V4L2_PIX_FMT_YUYV;
+/* Set this value if we want to pretend a specific V4L2 output format 
+ *  This format is for the streaming interface
+ */
+static int streaming_v4l2_fmt = V4L2_PIX_FMT_YUYV;
+
+MODULE_PARM_DESC(video_buffers,"Number of frame buffers used for streaming");
+module_param(video_buffers, int, 0664);
+MODULE_PARM_DESC(capture_buffer_size,"Capture buffer size");
+module_param(capture_buffer_size, int, 0664);
+MODULE_PARM_DESC(image_hsize,"Horizontal size of input image");
+module_param(image_hsize, int, 0664);
+MODULE_PARM_DESC(image_vsize,"Vertical size of input image");
+module_param(image_vsize, int, 0664);
+MODULE_PARM_DESC(frame_rate_scaler, "Frame rate scaler");
+module_param(frame_rate_scaler, int, 0664);
+MODULE_PARM_DESC(prev_hsize, "Horizontal image size of preview path output");
+module_param(prev_hsize, int, 0664);
+MODULE_PARM_DESC(prev_vsize, "Vertical image size of preview path output");
+module_param(prev_vsize, int, 0664);
+MODULE_PARM_DESC(prev_decimation_factor, "Preview path decimaion factor");
+module_param(prev_decimation_factor, int, 0664);
+/* Single frame capturing states */
+enum {
+	STATE_IDLE = 0,
+	STATE_CAPTURE_READY,
+	STATE_CAPTURE_WAIT_SOF,
+	STATE_CAPTURE_IN_PROGRESS,
+	STATE_CAPTURE_DONE,
+	STATE_CAPTURE_ERROR,
+};
+
+/* Frame buffer states
+ *  FRAME_UNUSED Frame(buffer) is not used by the ISI module -> an application
+ *  can usually read out data in this state
+ *  FRAME_QUEUED An application has queued the buffer in the incoming queue 
+ *  FRAME_DONE The ISI module has filled the buffer with data and placed is on
+ *  the outgoing queue
+ *  FRAME_ERROR Not used at the moment
+ *  */
+enum frame_status {
+	FRAME_UNUSED,
+	FRAME_QUEUED,
+	FRAME_DONE,
+	FRAME_ERROR,
+};
+/* Frame buffer descriptor 
+ *  Used by the ISI module as a linked list for the DMA controller.
+ */
+struct fbd {
+	/* Physical address of the frame buffer */
+	dma_addr_t fb_address;
+	/* Physical address of the next fbd */
+	dma_addr_t next_fbd_address;
+};
+
+/* Frame buffer data
+ */
+struct frame_buffer {
+	/*  Frame buffer descriptor
+	 *  Used by the ISI DMA controller to provide linked list DMA operation
+	 */
+	struct fbd fb_desc;
+	/* Pointer to the start of the frame buffer */
+	void *frame_buffer;
+	/* Timestamp of the captured frame */
+	struct timeval timestamp;
+	/* Frame number of the frame  */
+	unsigned long sequence;
+	/* Buffer number*/
+	int index;
+	/* Bytes used in the buffer for data, needed as buffers are always
+	 *  aligned to pages and thus may be bigger than the amount of data*/
+	int bytes_used;
+	/* Mmap count
+	 *  Counter to measure how often this buffer is mmapped 
+	 */
+	int mmap_count;
+	/* Buffer status */
+	enum frame_status status;
+};
+
+struct atmel_isi {
+	/* ISI module spin lock. Protects against concurrent access of variables
+	 * that are shared with the ISR */
+	spinlock_t			lock;
+	void __iomem			*regs;
+	/* Pointer to the start of the fbd list */
+	dma_addr_t			fbd_list_start;
+	/* Frame buffers */
+	struct frame_buffer 		video_buffer[ISI_VIDEO_BUFFERS_MAX];
+	/* Frame buffer currently used by the ISI module */
+	struct frame_buffer		*current_buffer;
+	/* Size of a frame buffer */
+	size_t				capture_buffer_size;
+	/* Streaming status 
+	 *  If set ISI is in streaming mode */
+	int				streaming;
+	/* Queue for incoming buffers
+	 *  The buffer number (index) is stored in the fifo as reference 
+	 */
+	struct kfifo 			*grabq;
+	/* Spinlock for the incoming queue */
+	spinlock_t 			grabq_lock;
+	/* Queue for outgoing buffers
+	 *  Buffer number is stored in the fifo as reference
+	 */
+	struct kfifo			*doneq;
+	/* Spinlock for the incoming queue */
+	spinlock_t			doneq_lock;
+
+	/* State of the ISI module in capturing mode */
+	int				state;
+	/* Pointer to ISI buffer */
+	void				*capture_buf;
+	/* Physical address of the capture buffer */
+	dma_addr_t			capture_phys;
+	/* Size of the ISI buffer */
+	size_t				capture_buf_size;
+	/* Capture/streaming wait queue */
+	wait_queue_head_t		capture_wq;
+
+	struct atmel_isi_camera		*camera;
+	struct atmel_isi_format		format;
+	struct atmel_isi_format		streaming_format;
+
+	struct mutex			mutex;
+	/* User counter for the streaming interface */
+	int				stream_users;
+	/* User counter of the capture interface */
+	int				capture_users;
+	/* Video device for capturing (Codec path) */
+	struct video_device		cdev;
+	/* Video device for streaming (Preview path) */
+	struct video_device		vdev;
+	struct completion		reset_complete;
+	struct clk			*pclk;
+	struct clk			*hclk;
+	struct platform_device		*pdev;
+	unsigned int			irq;
+};
+
+#define to_atmel_isi(vdev) container_of(vdev, struct atmel_isi, vdev)
+
+struct atmel_isi_fh {
+	struct atmel_isi		*isi;
+	unsigned int			read_off;
+};
+
+/*-----------------------------------------------------------------------------
+ * Interface to the actual camera.
+ */
+static LIST_HEAD(camera_list);
+static DEFINE_MUTEX(camera_list_mutex);
+
+static void avr32_isi_release_camera(struct atmel_isi *isi,
+				     struct atmel_isi_camera *cam)
+{
+	mutex_lock(&camera_list_mutex);
+	cam->isi = NULL;
+	isi->camera = NULL;
+	module_put(cam->owner);
+	mutex_unlock(&camera_list_mutex);
+}
+
+int atmel_isi_register_camera(struct atmel_isi_camera *cam)
+{
+	pr_debug("atmel_isi: register camera %s\n", cam->name);
+
+	mutex_lock(&camera_list_mutex);
+	list_add_tail(&cam->list, &camera_list);
+	mutex_unlock(&camera_list_mutex);
+
+	return 0;
+}
+EXPORT_SYMBOL_GPL(atmel_isi_register_camera);
+
+void atmel_isi_unregister_camera(struct atmel_isi_camera *cam)
+{
+	pr_debug("atmel_isi: unregister camera %s\n", cam->name);
+
+	mutex_lock(&camera_list_mutex);
+	if (cam->isi)
+		cam->isi->camera = NULL;
+	list_del(&cam->list);
+	mutex_unlock(&camera_list_mutex);
+}
+EXPORT_SYMBOL_GPL(atmel_isi_unregister_camera);
+
+static struct atmel_isi_camera * avr32_isi_grab_camera(struct atmel_isi *isi)
+{
+	struct atmel_isi_camera *entry, *cam = NULL;
+
+	mutex_lock(&camera_list_mutex);
+	list_for_each_entry(entry, &camera_list, list) {
+		/* Just grab the first camera available */
+		if (!entry->isi) {
+			if (!try_module_get(entry->owner))
+				continue;
+
+			cam = entry;
+			cam->isi = isi;
+			pr_debug("%s: got camera: %s\n",
+				 isi->vdev.name, cam->name);
+			break;
+		}
+	}
+	mutex_unlock(&camera_list_mutex);
+
+	return cam;
+}
+
+static int avr32_isi_set_camera_input(struct atmel_isi *isi)
+{
+	struct atmel_isi_camera *cam = isi->camera;
+	int ret;
+	u32 cr1;
+	u32 cr2;
+
+	isi->format.pix.width = image_hsize;
+	isi->format.pix.height = image_vsize;
+	isi->format.pix.bytesperline = 0;
+
+	ret = cam->set_format(cam, &isi->format);
+	if (ret)
+		return ret;
+
+
+	switch (isi->format.input_format) {
+	case ATMEL_ISI_PIXFMT_GREY:
+		cr2 = ISI_BIT(GRAYSCALE);
+		break;
+	case ATMEL_ISI_PIXFMT_CbYCrY:
+		cr2 = ISI_BF(YCC_SWAP, 0);
+		break;
+	case ATMEL_ISI_PIXFMT_CrYCbY:
+		cr2 = ISI_BF(YCC_SWAP, 1);
+		break;
+	case ATMEL_ISI_PIXFMT_YCbYCr:
+		cr2 = ISI_BF(YCC_SWAP, 2);
+		break;
+	case ATMEL_ISI_PIXFMT_YCrYCb:
+		cr2 = ISI_BF(YCC_SWAP, 3);
+		break;
+	case ATMEL_ISI_PIXFMT_RGB24:
+		cr2 = ISI_BIT(COL_SPACE) | ISI_BF(RGB_CFG, 0);
+		break;
+	case ATMEL_ISI_PIXFMT_BGR24:
+		cr2 = ISI_BIT(COL_SPACE) | ISI_BF(RGB_CFG, 1);
+		break;
+	case ATMEL_ISI_PIXFMT_RGB16:
+		cr2 = (ISI_BIT(COL_SPACE) | ISI_BIT(RGB_MODE)
+		       | ISI_BF(RGB_CFG, 0));
+		break;
+	case ATMEL_ISI_PIXFMT_BGR16:
+		cr2 = (ISI_BIT(COL_SPACE) | ISI_BIT(RGB_MODE)
+		       | ISI_BF(RGB_CFG, 1));
+		break;
+	case ATMEL_ISI_PIXFMT_GRB16:
+		cr2 = (ISI_BIT(COL_SPACE) | ISI_BIT(RGB_MODE)
+		       | ISI_BF(RGB_CFG, 2));
+		break;
+	case ATMEL_ISI_PIXFMT_GBR16:
+		cr2 = (ISI_BIT(COL_SPACE) | ISI_BIT(RGB_MODE)
+		       | ISI_BF(RGB_CFG, 3));
+		break;
+	case ATMEL_ISI_PIXFMT_RGB24_REV:
+		cr2 = (ISI_BIT(COL_SPACE) | ISI_BIT(RGB_SWAP)
+		       | ISI_BF(RGB_CFG, 0));
+		break;
+	case ATMEL_ISI_PIXFMT_BGR24_REV:
+		cr2 = (ISI_BIT(COL_SPACE) | ISI_BIT(RGB_SWAP)
+		       | ISI_BF(RGB_CFG, 1));
+		break;
+	case ATMEL_ISI_PIXFMT_RGB16_REV:
+		cr2 = (ISI_BIT(COL_SPACE) | ISI_BIT(RGB_SWAP)
+		       | ISI_BIT(RGB_MODE) | ISI_BF(RGB_CFG, 0));
+		break;
+	case ATMEL_ISI_PIXFMT_BGR16_REV:
+		cr2 = (ISI_BIT(COL_SPACE) | ISI_BIT(RGB_SWAP)
+		       | ISI_BIT(RGB_MODE) | ISI_BF(RGB_CFG, 1));
+		break;
+	case ATMEL_ISI_PIXFMT_GRB16_REV:
+		cr2 = (ISI_BIT(COL_SPACE) | ISI_BIT(RGB_SWAP)
+		       | ISI_BIT(RGB_MODE) | ISI_BF(RGB_CFG, 2));
+		break;
+	case ATMEL_ISI_PIXFMT_GBR16_REV:
+		cr2 = (ISI_BIT(COL_SPACE) | ISI_BIT(RGB_SWAP)
+		       | ISI_BIT(RGB_MODE) | ISI_BF(RGB_CFG, 3));
+		break;
+	default:
+		return -EINVAL;
+	}
+
+	
+	cr1 = ISI_BF(EMB_SYNC, cam->has_emb_sync)
+		| ISI_BF(HSYNC_POL, cam->hsync_act_low)
+		| ISI_BF(VSYNC_POL, cam->vsync_act_low)
+		| ISI_BF(PIXCLK_POL, cam->pclk_act_falling)
+		| ISI_BIT(DIS);
+
+	isi_writel(isi, CR1, cr1);
+	isi_writel(isi, CR2, cr2);
+
+	return 0;
+}
+
+static int avr32_isi_capture_set_format(struct atmel_isi *isi,
+				struct atmel_isi_format *fmt)
+{
+	u32 cr2;
+
+	fmt->pix.width = min(2048U, fmt->pix.width);
+	fmt->pix.height = min(2048U, fmt->pix.height);
+	fmt->pix.bytesperline = 0;
+
+	/* Set format if we have specified one */
+	if(capture_v4l2_fmt){
+		fmt->pix.pixelformat = capture_v4l2_fmt;
+	}
+	else {
+		/* Codec path output format */
+		fmt->pix.pixelformat = V4L2_PIX_FMT_YVYU;
+	}
+
+	/* The ISI module outputs either YUV 4:2:2 (codec path)
+	 * or RGB 5:5:5 (preview path) (ISI grayscale mode is not supported 
+	 * by V4L2). Therefore two pixels will be in a 32bit word */
+	fmt->pix.bytesperline = ALIGN(fmt->pix.width * 2, 4);
+	fmt->pix.sizeimage = fmt->pix.bytesperline * fmt->pix.height;
+	
+	cr2 = isi_readl(isi, CR2);
+	cr2 = ISI_BFINS(IM_VSIZE, fmt->pix.height - 1, cr2);
+	cr2 = ISI_BFINS(IM_HSIZE, fmt->pix.width - 1, cr2);
+	isi_writel(isi, CR2, cr2);
+
+	pr_debug("set capture format: width=%d height=%d\n",
+		fmt->pix.width, fmt->pix.height);
+
+	return 0;
+}
+
+static int avr32_isi_streaming_set_format(struct atmel_isi *isi,
+				struct atmel_isi_format *fmt)
+{
+	memcpy(&isi->streaming_format, &isi->format, 
+		sizeof(struct atmel_isi_format)); 
+#ifndef ISI_CODEC
+	fmt->pix.width = min(640U, prev_hsize);
+	fmt->pix.height = min(480U, prev_vsize);
+	fmt->pix.bytesperline = 0;
+
+	/* Set format if we have specified one */
+	if(streaming_v4l2_fmt){
+		fmt->pix.pixelformat = streaming_v4l2_fmt;
+	}
+	else {
+		/* Preview path output format
+		 * Would be logically V4L2_PIX_FMT_BGR555X 
+		 * but this format does not exist in the specification
+		 * So for now we pretend V4L2_PIX_FMT_RGB555X 
+		 */
+		fmt->pix.pixelformat = V4L2_PIX_FMT_RGB555X;
+	}
+
+	/* The ISI module outputs either YUV 4:2:2 (codec path) 
+	 * or RGB 5:5:5 (preview path) (ISI grayscale mode is not 
+	 * supported yet. Therefore two pixels will be in a 32bit word 
+	 */
+	fmt->pix.bytesperline = ALIGN(fmt->pix.width * 2, 4);
+	fmt->pix.sizeimage = fmt->pix.bytesperline * fmt->pix.height;
+	
+	/* These values depend on the sensor output image size */
+	isi_writel(isi, PDECF, prev_decimation_factor);/* 1/16 * 16 = 1*/
+	isi_writel(isi,PSIZE , ISI_BF(PREV_HSIZE,prev_hsize - 1)
+		| ISI_BF(PREV_VSIZE, prev_vsize - 1));
+
+	pr_debug("set_format: cr1=0x%08x cr2=0x%08x\n",
+		 isi_readl(isi, CR1), isi_readl(isi, CR2));
+#else
+	avr32_isi_capture_set_format(isi, &isi->streaming_format);
+#endif
+	return 0;
+}
+
+static int avr32_isi_start_capture(struct atmel_isi *isi)
+{
+	u32 cr1;
+	int ret;
+
+	spin_lock_irq(&isi->lock);
+	isi->state = STATE_IDLE;
+	isi_readl(isi, SR); /* clear any pending SOF interrupt */
+	isi_writel(isi, IER, ISI_BIT(SOF));
+	isi_writel(isi, CR1, isi_readl(isi, CR1) & ~ISI_BIT(DIS));	
+	spin_unlock_irq(&isi->lock);
+
+	pr_debug("isi: waiting for SOF\n");
+	ret = wait_event_interruptible(isi->capture_wq,
+				       isi->state != STATE_IDLE);
+	if (ret)
+		return ret;
+	if (isi->state != STATE_CAPTURE_READY)
+		return -EIO;
+
+	/*
+	 * Do a codec request. Next SOF indicates start of capture,
+	 * the one after that indicates end of capture.
+	 */
+	pr_debug("isi: starting capture\n");
+	isi_writel(isi, CDBA, isi->capture_phys);
+
+	spin_lock_irq(&isi->lock);
+	isi->state = STATE_CAPTURE_WAIT_SOF;
+	cr1 = isi_readl(isi, CR1);
+	cr1 |= ISI_BIT(CODEC_ON);
+	isi_writel(isi, CR1, cr1);
+	isi_writel(isi, IER, ISI_CAPTURE_MASK);
+	spin_unlock_irq(&isi->lock);
+
+	return 0;
+}
+
+static void avr32_isi_capture_done(struct atmel_isi *isi,
+				   int state)
+{
+	u32 cr1;
+
+	cr1 = isi_readl(isi, CR1);
+	cr1 &= ~ISI_BIT(CODEC_ON);
+	isi_writel(isi, CR1, cr1);
+
+	isi->state = state;
+	wake_up_interruptible(&isi->capture_wq);
+	isi_writel(isi, IDR, ISI_CAPTURE_MASK);
+}
+
+static irqreturn_t avr32_isi_handle_streaming(struct atmel_isi *isi, 
+	int sequence){
+	
+	int reqnr;
+
+	if(kfifo_get(isi->grabq, (unsigned char *) &reqnr,
+			sizeof(int)) != sizeof(int)){
+			
+		/* as no new buffer is available we keep the
+		* current one
+		*/
+		pr_debug("isi: dropping frame\n");
+#ifdef ISI_CODEC
+		isi_writel(isi, CDBA, 
+			isi->current_buffer->fb_desc.fb_address);
+
+		isi_writel(isi, CR1, ISI_BIT(CODEC_ON) | 
+			isi_readl(isi, CR1));
+#else
+		/* TEST this has to be tested if it messes up the ISI
+		 * streaming process */
+		isi_writel(isi, PPFBD, (unsigned long) 
+			&isi->video_buffer[isi->current_buffer->index]);
+#endif
+	}
+	else{
+		isi->current_buffer->status = FRAME_DONE;
+		isi->current_buffer->sequence = sequence;
+			
+		do_gettimeofday(&isi->current_buffer->timestamp);
+			
+		/*isi->current_buffer->bytes_used = 
+			ISI_VIDEO_MAX_FRAME_SIZE; */
+			
+		kfifo_put(isi->doneq, (unsigned char *) 
+			&(isi->current_buffer->index), sizeof(int));
+			
+		isi->current_buffer = &(isi->video_buffer[reqnr]);
+#ifdef ISI_CODEC
+		isi_writel(isi, CDBA, 
+			isi->current_buffer->fb_desc.fb_address);
+		isi_writel(isi, CR1, ISI_BIT(CODEC_ON) | 
+			isi_readl(isi, CR1));
+#else
+		/*TODO check if fbd corresponds to frame buffer */
+#endif
+		wake_up_interruptible(&isi->capture_wq);
+	}
+	return IRQ_HANDLED;
+}
+
+/* FIXME move code from ISR here
+static irqreturn_t avr32_isi_handle_capturing(struct atmel_isi *isi){
+
+}*/
+/* isi interrupt service routine */
+static irqreturn_t isi_interrupt(int irq, void *dev_id)
+{
+	struct atmel_isi *isi = dev_id;
+	u32 status, mask, pending;
+	irqreturn_t ret = IRQ_NONE;
+	static int sequence = 0;
+
+	spin_lock(&isi->lock);
+
+	status = isi_readl(isi, SR);
+	mask = isi_readl(isi, IMR);
+	pending = status & mask;
+
+	pr_debug("isi: interrupt status %x pending %x\n",
+		 status, pending);
+	if(isi->streaming){
+		if(likely(pending & (ISI_BIT(FO_C_EMP) | ISI_BIT(FO_P_EMP)))){
+		
+			sequence++;
+		 	ret = avr32_isi_handle_streaming(isi, sequence);
+		}
+	}
+	else{
+	while (pending) {
+		if (pending & (ISI_BIT(FO_C_OVF) | ISI_BIT(FR_OVR))) {
+			avr32_isi_capture_done(isi, STATE_CAPTURE_ERROR);
+			pr_debug("%s: FIFO overrun (status=0x%x)\n",
+				 isi->vdev.name, status);
+		} else if (pending & ISI_BIT(SOF)) {
+			switch (isi->state) {
+			case STATE_IDLE:
+				isi->state = STATE_CAPTURE_READY;
+				wake_up_interruptible(&isi->capture_wq);
+				break;
+			case STATE_CAPTURE_READY:
+				break;
+			case STATE_CAPTURE_WAIT_SOF:
+				isi->state = STATE_CAPTURE_IN_PROGRESS;
+				break;
+			/*
+			case STATE_CAPTURE_IN_PROGRESS:
+				avr32_isi_capture_done(isi, STATE_CAPTURE_DONE);
+				break;
+				*/
+			}
+		}
+		if (pending & ISI_BIT(FO_C_EMP)){
+			if( isi->state == STATE_CAPTURE_IN_PROGRESS)
+				avr32_isi_capture_done(isi, STATE_CAPTURE_DONE);
+		}
+
+		if (pending & ISI_BIT(SOFTRST)) {
+			complete(&isi->reset_complete);
+			isi_writel(isi, IDR, ISI_BIT(SOFTRST));
+		}
+
+		status = isi_readl(isi, SR);
+		mask = isi_readl(isi, IMR);
+		pending = status & mask;
+		ret = IRQ_HANDLED;
+	}
+	}
+	spin_unlock(&isi->lock);
+
+	return ret;
+}
+
+/* ------------------------------------------------------------------------
+ *  IOCTL videoc handling
+ *  ----------------------------------------------------------------------*/
+
+/* --------Capture ioctls ------------------------------------------------*/
+/* Device capabilities callback function.
+ */
+static int avr32_isi_capture_querycap(struct file *file, void *priv,
+			      struct v4l2_capability *cap)
+{
+	strcpy(cap->driver, "atmel-isi");
+	strcpy(cap->card, "Atmel Image Sensor Interface");
+	cap->version = ATMEL_ISI_VERSION;
+	/* V4L2_CAP_VIDEO_CAPTURE -> This is a capture device
+	 * V4L2_CAP_READWRITE -> read/write interface used
+	 */
+	cap->capabilities = (V4L2_CAP_VIDEO_CAPTURE 
+			     | V4L2_CAP_READWRITE
+			     );
+	return 0;
+}
+
+/*  Input enumeration callback function. 
+ *  Enumerates available input devices.
+ *  This can be called many times from the V4L2-layer by 
+ *  incrementing the index to get all avaliable input devices.
+ */
+static int avr32_isi_capture_enum_input(struct file *file, void *priv,
+				struct v4l2_input *input)
+{
+	struct atmel_isi_fh *fh = priv;
+	struct atmel_isi *isi = fh->isi;
+
+	/* Just one input (ISI) is available */
+	if (input->index != 0)
+		return -EINVAL;
+
+	/* Set input name as camera name */
+	strlcpy(input->name, isi->camera->name, sizeof(input->name));
+	input->type = V4L2_INPUT_TYPE_CAMERA;
+	
+	/* Set to this value just because this should be set to a 
+	 * defined value
+	 */
+	input->std = V4L2_STD_PAL;
+
+	return 0;
+}
+/* Selects an input device.
+ *  One input device (ISI) currently supported.
+ */
+static int avr32_isi_capture_s_input(struct file *file, void *priv,
+			     unsigned int index)
+{
+	if (index != 0)
+		return -EINVAL;
+	return 0;
+}
+
+/* Gets current input device.
+ */
+static int avr32_isi_capture_g_input(struct file *file, void *priv,
+			     unsigned int *index)
+{
+	*index = 0;
+	return 0;
+}
+
+/* Format callback function 
+ * Returns a v4l2_fmtdesc structure with according values to a
+ * index.
+ * This function is called from user space until it returns 
+ * -EINVAL.
+ */
+static int avr32_isi_capture_enum_fmt_cap(struct file *file, void *priv,
+				  struct v4l2_fmtdesc *fmt)
+{
+	if (fmt->index != 0)
+		return -EINVAL;
+
+	/* if we want to pretend another ISI output 
+	 * this is usefull if we input an other input format from a camera
+	 * than specified in the ISI -> makes it possible to swap bytes 
+	 * in the ISI output format but messes up the preview path output
+	 */ 
+	if(capture_v4l2_fmt){
+		fmt->pixelformat = capture_v4l2_fmt;
+	}
+	else {
+		/* This is the format the ISI tries to output */
+		strcpy(fmt->description, "YCbYCr (YUYV) 4:2:2");
+		fmt->pixelformat = V4L2_PIX_FMT_YUYV;
+	}
+
+	return 0;
+}
+
+static int avr32_isi_capture_try_fmt_cap(struct file *file, void *priv,
+			struct v4l2_format *vfmt)
+{
+	struct atmel_isi_fh *fh = priv;
+	struct atmel_isi *isi = fh->isi;
+
+	/* Just return the current format for now */
+	memcpy(&vfmt->fmt.pix, &isi->format.pix,
+		sizeof(struct v4l2_pix_format));
+
+	return 0;
+}
+
+/* Gets current hardware configuration
+ *  For capture devices the pixel format settings are 
+ *  important.
+ */
+static int avr32_isi_capture_g_fmt_cap(struct file *file, void *priv,
+			       struct v4l2_format *vfmt)
+{
+	struct atmel_isi_fh *fh = priv;
+	struct atmel_isi *isi = fh->isi;
+
+	/* Return current pixel format */
+	memcpy(&vfmt->fmt.pix, &isi->format.pix,
+	       sizeof(struct v4l2_pix_format));
+
+	return 0;
+}
+
+static int avr32_isi_capture_s_fmt_cap(struct file *file, void *priv,
+			       struct v4l2_format *vfmt)
+{
+	struct atmel_isi_fh *fh = priv;
+	struct atmel_isi *isi = fh->isi;
+	int ret = 0;
+	
+	/* We have a fixed format so just copy the current format 
+	 * back
+	 */
+	memcpy(&vfmt->fmt.pix, &isi->format.pix,
+		sizeof(struct v4l2_pix_format));
+
+	return ret;
+}
+
+/* ------------ Preview path ioctls ------------------------------*/
+/* Device capabilities callback function.
+ */
+static int avr32_isi_querycap(struct file *file, void *priv,
+			      struct v4l2_capability *cap)
+{
+	strcpy(cap->driver, "atmel-isi");
+	strcpy(cap->card, "Atmel Image Sensor Interface");
+	cap->version = ATMEL_ISI_VERSION;
+	/* V4L2_CAP_VIDEO_CAPTURE -> This is a capture device
+	 * V4L2_CAP_READWRITE -> read/write interface used
+	 * V4L2_CAP_STREAMING -> ioctl + mmap interface used
+	 */
+	cap->capabilities = (V4L2_CAP_VIDEO_CAPTURE 
+			     | V4L2_CAP_READWRITE
+			     | V4L2_CAP_STREAMING
+			     );
+	return 0;
+}
+
+/* Input enumeration callback function. 
+ *  Enumerates available input devices.
+ *  This can be called many times from the V4L2-layer by 
+ *  incrementing the index to get all avaliable input devices.
+ */
+static int avr32_isi_enum_input(struct file *file, void *priv,
+				struct v4l2_input *input)
+{
+	struct atmel_isi_fh *fh = priv;
+	struct atmel_isi *isi = fh->isi;
+
+	/* Just one input (ISI) is available */
+	if (input->index != 0)
+		return -EINVAL;
+
+	/* Set input name as camera name */
+	strlcpy(input->name, isi->camera->name, sizeof(input->name));
+	input->type = V4L2_INPUT_TYPE_CAMERA;
+	
+	/* Set to this value just because this should be set to a 
+	 * defined value
+	 */
+	input->std = V4L2_STD_PAL;
+
+	return 0;
+}
+
+/* Selects an input device.
+ *  One input device (ISI) currently supported.
+ */
+static int avr32_isi_s_input(struct file *file, void *priv,
+			     unsigned int index)
+{
+	if (index != 0)
+		return -EINVAL;
+
+	return 0;
+}
+
+/* Gets current input device.
+ */
+static int avr32_isi_g_input(struct file *file, void *priv,
+			     unsigned int *index)
+{
+	*index = 0;
+	return 0;
+}
+
+/* Format callback function 
+ * Returns a v4l2_fmtdesc structure with according values to a
+ * index.
+ * This function is called from user space until it returns 
+ * -EINVAL.
+ */
+static int avr32_isi_enum_fmt_cap(struct file *file, void *priv,
+				  struct v4l2_fmtdesc *fmt)
+{
+	struct atmel_isi_fh *fh = priv;
+	struct atmel_isi *isi = fh->isi;
+
+	if (fmt->index != 0)
+		return -EINVAL;
+
+	/* TODO: Return all possible formats 
+	* This depends on ISI and camera.
+	* A enum_fmt function or a data structure should be 
+	* added to the camera driver.
+	* For now just one format supported 
+	*/
+	if(streaming_v4l2_fmt){
+		strcpy(fmt->description, "Pretended format");
+	}
+	else{
+		strcpy(fmt->description, "Normal format");
+	}
+	fmt->pixelformat = isi->streaming_format.pix.pixelformat;//V4L2_PIX_FMT_UYVY;
+
+	return 0;
+}
+
+static int avr32_isi_try_fmt_cap(struct file *file, void *priv,
+			struct v4l2_format *vfmt)
+{
+	struct atmel_isi_fh *fh = priv;
+	struct atmel_isi *isi = fh->isi;
+
+	/* FIXME For now we just return the current format*/
+	memcpy(&vfmt->fmt.pix, &isi->streaming_format.pix,
+		sizeof(struct v4l2_pix_format));
+	return 0;
+}
+
+/* Gets current hardware configuration
+ *  For capture devices the pixel format settings are 
+ *  important.
+ */
+static int avr32_isi_g_fmt_cap(struct file *file, void *priv,
+			       struct v4l2_format *vfmt)
+{
+	struct atmel_isi_fh *fh = priv;
+	struct atmel_isi *isi = fh->isi;
+
+	/*Copy current pixel format structure to user space*/
+	memcpy(&vfmt->fmt.pix, &isi->streaming_format.pix,
+	       sizeof(struct v4l2_pix_format));
+
+	return 0;
+}
+
+static int avr32_isi_s_fmt_cap(struct file *file, void *priv,
+			       struct v4l2_format *vfmt)
+{
+	struct atmel_isi_fh *fh = priv;
+	struct atmel_isi *isi = fh->isi;
+	int ret = 0;
+	
+	/* Just return the current format as we do not support
+	* format switching */
+	memcpy(&vfmt->fmt.pix, &isi->streaming_format.pix,
+		sizeof(struct v4l2_pix_format));
+
+	return ret;
+}
+
+/* Checks if control is supported in driver
+ * No controls currently supported yet
+ */
+static int avr32_isi_queryctrl(struct file *file, void *priv,
+			   struct v4l2_queryctrl *qc)
+{
+	switch(qc->id){
+	case V4L2_CID_BRIGHTNESS:
+		strcpy(qc->name, "Brightness");
+		qc->minimum = 0;
+		qc->maximum = 100;
+		qc->step = 1;
+		qc->default_value = 50;
+		qc->flags = 0;
+		break;
+	default:
+		return -EINVAL;
+	}
+	return 0;
+}
+
+static int avr32_isi_g_ctrl(struct file *file, void *priv,
+			struct v4l2_control *ctrl)
+{
+	switch(ctrl->id){
+	case V4L2_CID_BRIGHTNESS:
+		ctrl->value = 0;
+		break;
+	default:
+		return -EINVAL;
+	}
+	return 0;
+}
+
+static int avr32_isi_s_ctrl(struct file *file, void *priv,
+			struct v4l2_control *ctrl)
+{
+	switch(ctrl->id){
+	case V4L2_CID_BRIGHTNESS:
+		break;
+	default:
+		return -EINVAL;
+	}
+	return 0;
+}
+
+static int avr32_isi_reqbufs(struct file *file, void *private_data, 
+			struct v4l2_requestbuffers *req)
+{
+	/* Only memory mapped buffers supported*/
+	if(req->memory != V4L2_MEMORY_MMAP){
+		pr_debug("atmel_isi: buffer format not supported\n");
+		return -EINVAL;
+	}
+	pr_debug("atmel_isi: Requested %d buffers. Using %d buffers\n",
+		req->count, video_buffers);
+	/* buffer number is fixed for now as it is difficult to get 
+	 * that memory at runtime */	
+	req->count = video_buffers;
+	memset(&req->reserved, 0, sizeof(req->reserved));
+	return 0;
+}
+
+static int avr32_isi_querybuf(struct file *file, void *private_data, 
+			struct v4l2_buffer *buf)
+{
+	struct atmel_isi_fh *fh = private_data;
+	struct atmel_isi *isi = fh->isi;
+	struct frame_buffer *buffer; 
+
+	if(unlikely(buf->type != V4L2_BUF_TYPE_VIDEO_CAPTURE))
+		return -EINVAL;
+	if(unlikely(buf->index >= video_buffers))
+		return -EINVAL;
+
+	buffer = &(isi->video_buffer[buf->index]);
+
+	buf->type = V4L2_BUF_TYPE_VIDEO_CAPTURE;
+	buf->length = video_buffer_size;
+	buf->memory = V4L2_MEMORY_MMAP;
+
+	/* set index as mmap reference to the buffer */
+	buf->m.offset = buf->index << PAGE_SHIFT;
+	
+	switch(buffer->status){
+	case FRAME_UNUSED:
+	case FRAME_ERROR:
+	case FRAME_QUEUED:
+		buf->flags |= V4L2_BUF_FLAG_QUEUED;
+		buf->bytesused = buffer->bytes_used;
+		break;
+	case FRAME_DONE:
+		buf->flags |= V4L2_BUF_FLAG_DONE;
+		buf->bytesused = buffer->bytes_used;
+		buf->sequence = buffer->sequence;
+		buf->timestamp = buffer->timestamp;
+		break;
+	}
+
+	buf->field = V4L2_FIELD_NONE; /* no interlacing stuff */
+
+	if(buffer->mmap_count)
+		buf->flags |= V4L2_BUF_FLAG_MAPPED;
+	else 
+		buf->flags &= ~V4L2_BUF_FLAG_MAPPED;
+
+	pr_debug("atmel_isi: querybuf index:%d offset:%d\n",
+		buf->index, buf->m.offset);
+
+	return 0;
+}
+
+static int avr32_isi_qbuf(struct file *file, void *private_data,
+			struct v4l2_buffer *buf)
+{
+	struct atmel_isi_fh *fh = private_data;
+	struct atmel_isi *isi = fh->isi;
+	struct frame_buffer *buffer;
+	
+	if(unlikely(buf->type != V4L2_BUF_TYPE_VIDEO_CAPTURE))
+		return -EINVAL;
+	if(unlikely(buf->index >= video_buffers || buf->index < 0))
+		return -EINVAL;
+	if(unlikely(buf->memory != V4L2_MEMORY_MMAP))
+		return -EINVAL;
+
+	buffer = &(isi->video_buffer[buf->index]);
+	if(unlikely(buffer->status != FRAME_UNUSED))
+		return -EINVAL;
+
+	mutex_lock(&isi->mutex);
+	buf->flags |= V4L2_BUF_FLAG_QUEUED;
+	buf->flags &= ~V4L2_BUF_FLAG_DONE;
+	buffer->status = FRAME_QUEUED;
+	kfifo_put(isi->grabq, (unsigned char*) &buf->index, sizeof(int));
+	mutex_unlock(&isi->mutex);
+
+	return 0;
+}
+
+static int avr32_isi_dqbuf(struct file *file, void *private_data,
+			struct v4l2_buffer *buf)
+{
+	struct atmel_isi_fh *fh = private_data;
+	struct atmel_isi *isi = fh->isi;
+	struct frame_buffer *buffer;
+	int reqnr = 0;
+
+	if(unlikely(buf->type != V4L2_BUF_TYPE_VIDEO_CAPTURE))
+		return -EINVAL;
+	/* Mencoder does not set this flag
+	 *
+	if(unlikely(buf->memory != V4L2_MEMORY_MMAP)){
+		pr_debug("isi: dequeue failed buffer not of mmapped type\n");
+		return -EINVAL;
+	}*/
+	if((kfifo_len(isi->doneq) == 0) && (file->f_flags & O_NONBLOCK)){
+		pr_debug("Done-queue is empty\n");
+		return -EAGAIN;
+	}
+	/*
+	if(wait_event_interruptible(isi->capture_wq, 
+		kfifo_len(isi->doneq) != 0) < 0){
+		pr_debug("Done-queue interrupted\n");
+		return -EINTR;
+	}
+	*/
+	if(!kfifo_get(isi->doneq, (unsigned char*) &reqnr, sizeof(int))){
+		return -EBUSY;
+	}
+	buffer = &(isi->video_buffer[reqnr]);
+
+	if(unlikely(buffer->status != FRAME_DONE)){
+		pr_debug("isi: error, dequeued buffer not ready\n");
+		return -EINVAL;
+	}
+	buf->index = reqnr;
+	buf->bytesused = buffer->bytes_used;
+	buf->timestamp = buffer->timestamp;
+	buf->sequence = buffer->sequence;
+	buf->m.offset = reqnr << PAGE_SHIFT;
+	buffer->status = FRAME_UNUSED;
+	buf->flags = V4L2_BUF_FLAG_MAPPED | V4L2_BUF_FLAG_DONE;
+
+	buf->length = isi->capture_buffer_size;
+	buf->field = V4L2_FIELD_NONE;
+	buf->memory = V4L2_MEMORY_MMAP;
+	return 0;
+}
+
+static int avr32_isi_streamon(struct file *file, void *private_data,
+			enum v4l2_buf_type type)
+{
+	struct atmel_isi_fh *fh = private_data;
+	struct atmel_isi *isi = fh->isi;
+	int reqnr;
+	struct frame_buffer *buffer;
+	u32 cr1;
+
+	if(unlikely(type != V4L2_BUF_TYPE_VIDEO_CAPTURE))
+		return -EINVAL;
+	
+	if(!kfifo_get(isi->grabq, (unsigned char*) &reqnr, sizeof(int))){
+		mutex_unlock(&isi->mutex);
+		pr_debug("atmel_isi: No buffer in IN-Queue, start of streaming\
+			aborted (one buffer is required in IN-Queue)\n"); 
+		return -EINVAL;
+	}
+	buffer = &(isi->video_buffer[reqnr]);
+	
+
+	spin_lock_irq(isi->lock);
+	isi->streaming = 1;
+	isi->current_buffer = buffer;
+	cr1 = isi_readl(isi, CR1);
+#ifdef ISI_CODEC
+	isi_writel(isi, CDBA, buffer->fb_desc.fb_address);
+	/* Enable codec path */
+	cr1 |= ISI_BIT(CODEC_ON) | ISI_BIT(DIS);
+#else
+	isi_writel(isi, PPFBD, isi->fbd_list_start);
+#endif
+	/* Enable interrupts */
+	isi_readl(isi, SR);
+	/* FIXME enable codec/preview path according to setup */
+	isi_writel(isi, IER, ISI_BIT(FO_C_EMP) | ISI_BIT(FO_P_EMP));
+
+	cr1 |= ISI_BF(FRATE, frame_rate_scaler);
+
+	/* Enable ISI module*/
+	cr1 &= ~ISI_BIT(DIS);
+	isi_writel(isi, CR1, cr1);
+	spin_unlock_irq(isi->lock);
+
+	isi->camera->start_capture(isi->camera);
+
+	return 0;
+}
+
+static int avr32_isi_streamoff(struct file *file, void *private_data,
+			enum v4l2_buf_type type)
+{
+	struct atmel_isi_fh *fh = private_data;
+	struct atmel_isi *isi = fh->isi;
+
+	if(unlikely(type != V4L2_BUF_TYPE_VIDEO_CAPTURE))
+		return -EINVAL;
+
+	spin_lock_irq(isi->lock);
+	isi->streaming = 0;
+#ifdef ISI_CODEC
+	/* Disble codec path */
+	isi_writel(isi, CR1, isi_readl(isi, CR1) & (~ISI_BIT(CODEC_ON)));
+#endif
+	/* Disable interrupts */
+	isi_writel(isi, IDR, ISI_BIT(FO_C_EMP) | ISI_BIT(FO_P_EMP));
+	
+	/* Disable ISI module*/
+	isi_writel(isi, CR1, isi_readl(isi, CR1) | ISI_BIT(DIS));
+	spin_unlock_irq(isi->lock);
+
+	isi->camera->stop_capture(isi->camera);
+	pr_debug("atmel_isi: Stream off\n");
+
+	return 0;
+}
+
+/*----------------------------------------------------------------------------*/
+static int avr32_isi_capture_close (struct inode *inode, struct file *file)
+{
+	struct atmel_isi_fh *fh = file->private_data;
+	struct atmel_isi *isi = fh->isi;
+	u32 cr1;
+
+	mutex_lock(&isi->mutex);
+
+	isi->capture_users--;
+	kfree(fh);
+
+	/* Stop camera and ISI  if driver has no users */
+	if(!isi->stream_users) {
+		isi->camera->stop_capture(isi->camera);
+
+		spin_lock_irq(&isi->lock);
+		cr1 = isi_readl(isi, CR1);
+		cr1 |= ISI_BIT(DIS);
+		isi_writel(isi, CR1, cr1);
+		spin_unlock_irq(&isi->lock);
+	}
+	mutex_unlock(&isi->mutex);
+
+	return 0;
+}
+
+static int avr32_isi_capture_open (struct inode *inode, struct file *file)
+{
+	struct video_device *vdev = video_devdata(file);
+	struct atmel_isi *isi = to_atmel_isi(vdev);
+	struct atmel_isi_fh *fh;
+	int ret = -EBUSY;
+	unsigned long timeout;
+
+	mutex_lock(&isi->mutex);
+	
+
+	if (isi->capture_users) {
+		pr_debug("%s: open(): device busy\n", vdev->name);
+		goto out;
+	}
+
+	if (!isi->camera) {
+
+		ret = -ENODEV;
+		isi->camera = avr32_isi_grab_camera(isi);
+		if (!isi->camera)
+			goto out;
+
+		ret = avr32_isi_set_camera_input(isi);
+		if(ret)
+			goto out;
+	}
+
+	avr32_isi_capture_set_format(isi, &isi->format);
+
+	/*
+	 * Reset the controller and wait for completion. The
+	 * reset will only succeed if we have a pixel clock
+	 * from the camera.
+	 */
+	if(isi->stream_users == 0){
+		
+		init_completion(&isi->reset_complete);
+		isi_writel(isi, IER, ISI_BIT(SOFTRST));
+		isi_writel(isi, CR1, ISI_BIT(RST));
+
+		timeout = wait_for_completion_timeout(&isi->reset_complete,
+			msecs_to_jiffies(100));
+
+		isi_writel(isi, IDR, ~0UL);
+		if (timeout == 0) {
+			ret = -ETIMEDOUT;
+			goto out;
+		}
+	}
+	
+	ret = -ENOMEM;
+	fh = kzalloc(sizeof(struct atmel_isi_fh), GFP_KERNEL);
+	if (!fh) {
+		pr_debug("%s: open(): out of memory\n", vdev->name);
+		goto out;
+	}
+
+	fh->isi = isi;
+	file->private_data = fh;
+	isi->capture_users++;
+
+	ret = 0;
+
+out:
+	mutex_unlock(&isi->mutex);
+	return ret;
+}
+
+static ssize_t avr32_isi_capture_read(struct file *file, char __user *data,
+			      size_t count, loff_t *ppos)
+{
+	struct atmel_isi_fh *fh = file->private_data;
+	struct atmel_isi *isi = fh->isi;
+	int state;
+	int ret;
+
+	state = STATE_IDLE;
+
+	pr_debug("isi: read %zu bytes read_off=%u state=%u sizeimage=%u\n",
+		count, fh->read_off, state, isi->format.pix.sizeimage);
+	isi->camera->start_capture(isi->camera);
+	
+
+	avr32_isi_start_capture(isi);
+
+	ret = wait_event_interruptible( isi->capture_wq,
+			(isi->state == STATE_CAPTURE_DONE)
+			|| (isi->state == STATE_CAPTURE_ERROR));
+	if (ret)
+		return ret;
+	if (isi->state == STATE_CAPTURE_ERROR) {
+		isi->state = STATE_IDLE;
+		return -EIO;
+	}
+
+	fh->read_off = 0;
+
+	count = min(count, (size_t)isi->format.pix.sizeimage - fh->read_off);
+	ret = copy_to_user(data, isi->capture_buf + fh->read_off, count);
+	if (ret)
+		return -EFAULT;
+
+	fh->read_off += count;
+	if (fh->read_off >= isi->format.pix.sizeimage)
+		isi->state = STATE_IDLE;
+
+	return count;
+}
+
+static void avr32_isi_capture_release (struct video_device *vdev)
+{
+	pr_debug("%s: release\n", vdev->name);
+}
+
+/* ----------------- Streaming interface -------------------------------------*/
+static void avr32_isi_vm_open(struct vm_area_struct *vma){
+	struct frame_buffer *buffer = 
+		(struct frame_buffer *) vma->vm_private_data;
+	buffer->mmap_count++;
+	pr_debug("atmel_isi: vm_open count=%d\n",buffer->mmap_count);
+}
+
+static void avr32_isi_vm_close(struct vm_area_struct *vma){
+	struct frame_buffer *buffer = 
+		(struct frame_buffer *) vma->vm_private_data;
+	pr_debug("atmel_isi: vm_close count=%d\n",buffer->mmap_count);	
+	buffer->mmap_count--;
+	if(buffer->mmap_count < 0)
+		printk("atmel_isi: mmap_count went negative\n");
+}
+
+/* FIXME remove this function 
+struct page *avr32_isi_vm_nopage( struct vm_area_struct *vma, 
+	unsigned long address, int *type )
+{
+    return NOPAGE_SIGBUS;
+}
+*/
+
+static struct vm_operations_struct avr32_isi_vm_ops = {
+	.open = avr32_isi_vm_open,
+	.close = avr32_isi_vm_close,
+	//.nopage = avr32_isi_vm_nopage,
+};
+
+static int avr32_isi_mmap(struct file *file, struct vm_area_struct *vma)
+{
+	unsigned long pfn;
+	int ret;
+	struct atmel_isi_fh *fh = file->private_data;
+	struct atmel_isi * isi = fh->isi;
+	struct frame_buffer *buffer = &(isi->video_buffer[vma->vm_pgoff]);
+	unsigned long size = vma->vm_end - vma->vm_start;
+
+	pr_debug("atmel_isi: mmap called pgoff=%ld size=%ld \n", 
+		vma->vm_pgoff, size);
+
+	if(size > video_buffer_size){
+		pr_debug("atmel_isi: mmap requested buffer is to large\n");
+		return -EINVAL;
+	}
+	if(vma->vm_pgoff > video_buffers){
+		pr_debug("atmel_isi: invalid mmap page offset\n");
+		return -EINVAL;
+	}
+	pfn = isi->video_buffer[vma->vm_pgoff].fb_desc.fb_address >> PAGE_SHIFT;
+
+	ret = remap_pfn_range(vma, vma->vm_start, pfn,
+		vma->vm_end - vma->vm_start, vma->vm_page_prot);
+	if(ret){
+		return ret;
+	}
+	
+	vma->vm_ops = &avr32_isi_vm_ops;
+	vma->vm_flags = VM_DONTEXPAND; /* fixed size */
+	vma->vm_flags |= VM_RESERVED;/* do not swap out */
+	vma->vm_flags |= VM_DONTCOPY;
+	vma->vm_flags |= VM_SHARED;
+	vma->vm_private_data = (void *) buffer;
+	avr32_isi_vm_open(vma);
+
+	pr_debug("atmel_isi: vma start=0x%08lx, size=%ld phys=%ld \n",
+		(unsigned long) vma->vm_start,
+		(unsigned long) vma->vm_end - (unsigned long) vma->vm_start,
+		pfn << PAGE_SHIFT);
+	return 0;
+}
+
+static unsigned int avr32_isi_poll(struct file *file, poll_table *wait)
+{
+	struct atmel_isi_fh *fh = file->private_data;
+	struct atmel_isi *isi = fh->isi;
+	unsigned int ret = 0;
+
+	mutex_lock(&isi->mutex);
+	poll_wait(file, &isi->capture_wq, wait);
+	if(kfifo_len(isi->doneq))
+		ret = POLLIN | POLLRDNORM;
+	mutex_unlock(&isi->mutex);
+
+	return ret;
+}
+
+static int avr32_isi_stream_close (struct inode *inode, struct file *file)
+{
+	struct atmel_isi_fh *fh = file->private_data;
+	struct atmel_isi *isi = fh->isi;
+	u32 cr1;
+
+	mutex_lock(&isi->mutex);
+
+	isi->stream_users--;
+	kfree(fh);
+
+	/* Stop camera and ISI if driver has no users */
+	if(!isi->capture_users) {
+		isi->camera->stop_capture(isi->camera);
+
+		spin_lock_irq(&isi->lock);
+		cr1 = isi_readl(isi, CR1);
+		cr1 |= ISI_BIT(DIS);
+		isi_writel(isi, CR1, cr1);
+		spin_unlock_irq(&isi->lock);
+	}
+
+	mutex_unlock(&isi->mutex);
+
+	return 0;
+}
+
+static int avr32_isi_stream_open (struct inode *inode, struct file *file)
+{
+	struct video_device *vdev = video_devdata(file);
+	struct atmel_isi *isi = to_atmel_isi(vdev);
+	struct atmel_isi_fh *fh;
+	int ret = -EBUSY;
+	unsigned long timeout;
+
+	mutex_lock(&isi->mutex);
+	
+
+	if (isi->stream_users) {
+		pr_debug("%s: open(): device busy\n", vdev->name);
+		goto out;
+	}
+
+	if (!isi->camera) {
+		ret = -ENODEV;
+		isi->camera = avr32_isi_grab_camera(isi);
+		if (!isi->camera)
+			goto out;
+		ret = -EINVAL;
+		ret = avr32_isi_set_camera_input(isi);
+		if(ret)
+			goto out;
+	}
+	avr32_isi_streaming_set_format(isi, &isi->format);
+	kfifo_reset(isi->grabq);
+	kfifo_reset(isi->doneq);
+
+	/*
+	 * Reset the controller and wait for completion. The
+	 * reset will only succeed if we have a pixel clock
+	 * from the camera.
+	 */
+	if(isi->stream_users == 0){
+		
+		init_completion(&isi->reset_complete);
+		isi_writel(isi, IER, ISI_BIT(SOFTRST));
+		isi_writel(isi, CR1, ISI_BIT(RST));
+
+		timeout = wait_for_completion_timeout(&isi->reset_complete,
+			msecs_to_jiffies(100));
+
+		if (timeout == 0) {
+			ret = -ETIMEDOUT;
+			goto out;
+		}
+		isi_writel(isi, IDR, ~0UL);
+	}
+
+	ret = -ENOMEM;
+	fh = kzalloc(sizeof(struct atmel_isi_fh), GFP_KERNEL);
+	if (!fh) {
+		pr_debug("%s: open(): out of memory\n", vdev->name);
+		goto out;
+	}
+
+	fh->isi = isi;
+	file->private_data = fh;
+	isi->stream_users++;
+
+	ret = 0;
+
+out:
+	mutex_unlock(&isi->mutex);
+	return ret;
+}
+
+static void avr32_isi_stream_release (struct video_device *vdev)
+{
+	struct atmel_isi *isi = to_atmel_isi(vdev);
+	pr_debug("%s: release\n", vdev->name);
+	kfree(isi);
+}
+
+/* -----------------------------------------------------------------------*/
+
+/* Streaming v4l2 device file operations */
+static struct file_operations avr32_isi_streaming_fops = {
+	.owner		= THIS_MODULE,
+	.ioctl		= video_ioctl2,
+	.open		= avr32_isi_stream_open,
+	.release	= avr32_isi_stream_close,
+	.mmap		= avr32_isi_mmap,
+	.poll		= avr32_isi_poll,
+};
+
+/* Capture v4l2 device file operations */
+static struct file_operations avr32_isi_capture_fops = {
+	.owner		= THIS_MODULE,
+	.open		= avr32_isi_capture_open,
+	.release	= avr32_isi_capture_close,
+	.read		= avr32_isi_capture_read,
+	.ioctl		= video_ioctl2,
+};
+
+static int __exit avr32_isi_remove(struct platform_device *pdev)
+{
+	struct atmel_isi *isi = platform_get_drvdata(pdev);
+	int i;
+
+	if (isi->camera)
+		isi->camera->stop_capture(isi->camera);
+
+	if (isi->camera)
+		avr32_isi_release_camera(isi, isi->camera);
+	video_unregister_device(&isi->cdev);
+	video_unregister_device(&isi->vdev);
+
+	platform_set_drvdata(pdev, NULL);
+
+	/* release capture buffer */
+	dma_free_coherent(&pdev->dev, capture_buffer_size,
+			  isi->capture_buf, isi->capture_phys);
+
+	/* release frame buffers */
+	for(i = 0; i < video_buffers; i++){
+		dma_free_coherent(&pdev->dev, 
+			video_buffer_size,
+			isi->video_buffer[i].frame_buffer,
+			isi->video_buffer[i].fb_desc.fb_address);
+	}
+
+	kfifo_free(isi->doneq);
+	kfifo_free(isi->grabq);
+	
+	free_irq(isi->irq, isi);
+	iounmap(isi->regs);
+	clk_disable(isi->hclk);
+	clk_disable(isi->pclk);
+	clk_put(isi->hclk);
+	clk_put(isi->pclk);
+
+	/*
+	 * Don't free isi here -- it will be taken care of by the
+	 * release() callback.
+	 */
+
+	return 0;
+}
+
+
+static int __init avr32_isi_probe(struct platform_device *pdev)
+{
+	unsigned int irq;
+	struct atmel_isi *isi;
+	struct clk *pclk, *hclk;
+	struct resource *regs;
+	int ret;
+	int i;
+	int video_bytes_used = video_buffer_size;
+
+	regs = platform_get_resource(pdev, IORESOURCE_MEM, 0);
+	if(!regs)
+		return -ENXIO;
+
+	pclk = clk_get(&pdev->dev, "pclk");
+	if (IS_ERR(pclk))
+		return PTR_ERR(pclk);
+	hclk = clk_get(&pdev->dev, "hclk");
+	if (IS_ERR(hclk)) {
+		ret = PTR_ERR(hclk);
+		goto err_hclk;
+	}
+	clk_enable(pclk);
+	clk_enable(hclk);
+
+	isi = kzalloc(sizeof(struct atmel_isi), GFP_KERNEL);
+	if(!isi){
+		ret = -ENOMEM;
+		dev_err(&pdev->dev, "can't allocate interface!\n");
+		goto err_alloc_isi;
+	}
+
+	isi->pclk = pclk;
+	isi->hclk = hclk;
+
+	/* Round up buffer sizes to the next page if needed */
+	video_buffer_size = PAGE_ALIGN(video_buffer_size);
+	capture_buffer_size = PAGE_ALIGN(capture_buffer_size);
+
+	spin_lock_init(&isi->lock);
+	mutex_init(&isi->mutex);
+	init_waitqueue_head(&isi->capture_wq);
+	
+	/* Initialize v4l2 capture device */
+	isi->cdev.fops = &avr32_isi_capture_fops;
+	strcpy(isi->cdev.name, "atmel_isi_capture");
+	isi->cdev.type = VFL_TYPE_GRABBER;
+	isi->cdev.type2 = VID_TYPE_CAPTURE;
+	isi->cdev.minor = -1;
+	isi->cdev.release =avr32_isi_capture_release;
+	isi->cdev.vidioc_querycap = avr32_isi_capture_querycap;
+	isi->cdev.vidioc_enum_fmt_cap = avr32_isi_capture_enum_fmt_cap;
+	isi->cdev.vidioc_try_fmt_cap = avr32_isi_capture_try_fmt_cap;
+	isi->cdev.vidioc_g_fmt_cap = avr32_isi_capture_g_fmt_cap;
+	isi->cdev.vidioc_s_fmt_cap = avr32_isi_capture_s_fmt_cap;
+	isi->cdev.vidioc_enum_input = avr32_isi_capture_enum_input;
+	isi->cdev.vidioc_g_input = avr32_isi_capture_g_input;
+	isi->cdev.vidioc_s_input = avr32_isi_capture_s_input;
+#ifdef DEBUG
+	isi->cdev.debug = V4L2_DEBUG_IOCTL | V4L2_DEBUG_IOCTL_ARG;
+#endif
+
+	/* Initialize v4l2 streaming device */
+	isi->vdev.fops = &avr32_isi_streaming_fops;
+	strcpy(isi->vdev.name, "atmel-isi");
+	isi->vdev.type = VFL_TYPE_GRABBER;
+	isi->vdev.type2 = VID_TYPE_CAPTURE;
+	isi->vdev.minor = -1;
+	isi->vdev.release = avr32_isi_stream_release;
+#ifdef DEBUG
+	isi->vdev.debug = V4L2_DEBUG_IOCTL | V4L2_DEBUG_IOCTL_ARG;
+#endif
+
+	isi->vdev.vidioc_querycap = avr32_isi_querycap;
+	isi->vdev.vidioc_enum_fmt_cap = avr32_isi_enum_fmt_cap;
+	isi->vdev.vidioc_try_fmt_cap = avr32_isi_try_fmt_cap;
+	isi->vdev.vidioc_g_fmt_cap = avr32_isi_g_fmt_cap;
+	isi->vdev.vidioc_s_fmt_cap = avr32_isi_s_fmt_cap;
+	isi->vdev.vidioc_enum_input = avr32_isi_enum_input;
+	isi->vdev.vidioc_g_input = avr32_isi_g_input;
+	isi->vdev.vidioc_s_input = avr32_isi_s_input;
+	isi->vdev.vidioc_queryctrl = avr32_isi_queryctrl;
+	isi->vdev.vidioc_g_ctrl = avr32_isi_g_ctrl;
+	isi->vdev.vidioc_s_ctrl = avr32_isi_s_ctrl;
+	isi->vdev.vidioc_querybuf = avr32_isi_querybuf;
+	isi->vdev.vidioc_reqbufs = avr32_isi_reqbufs;
+	isi->vdev.vidioc_qbuf = avr32_isi_qbuf;
+	isi->vdev.vidioc_dqbuf = avr32_isi_dqbuf;
+	isi->vdev.vidioc_streamon = avr32_isi_streamon;
+	isi->vdev.vidioc_streamoff = avr32_isi_streamoff;
+
+	isi->regs = ioremap(regs->start, regs->end - regs->start + 1);
+        if (!isi->regs) {
+		ret = -ENOMEM;
+		goto err_ioremap;
+	}
+
+	irq = platform_get_irq(pdev,0);
+	ret = request_irq(irq, isi_interrupt, 0, "isi", isi);
+	if (ret) {
+		dev_err(&pdev->dev, "unable to request irq %d\n", irq);
+		goto err_req_irq;
+	}
+	isi->irq = irq;
+
+	/* Allocate ISI capture buffer */
+	isi->capture_buf = dma_alloc_coherent(&pdev->dev,
+					      capture_buffer_size,
+					      &isi->capture_phys,
+					      GFP_KERNEL);
+	if (!isi->capture_buf) {
+		ret = -ENOMEM;
+		dev_err(&pdev->dev, "failed to allocate capture buffer\n");
+		goto err_alloc_cbuf;
+	}
+
+	/* Allocate and initialize video buffers */
+	for(i=0;i < video_buffers; i++){
+		memset(&isi->video_buffer[i], 0, sizeof(struct frame_buffer));
+		isi->video_buffer[i].frame_buffer = 
+			dma_alloc_coherent(&pdev->dev,
+				video_buffer_size,
+				(dma_addr_t *)
+				&(isi->video_buffer[i].fb_desc.fb_address),
+				GFP_KERNEL);
+		if(!isi->video_buffer[i].frame_buffer){
+			ret = -ENOMEM;
+			dev_err(&pdev->dev, 
+				"failed to allocate video buffer\n");
+			goto err_alloc_vbuf;
+		}
+		
+		isi->video_buffer[i].bytes_used = video_bytes_used;
+		isi->video_buffer[i].status = FRAME_UNUSED;
+		isi->video_buffer[i].index = i;
+
+#ifdef DEBUG
+	/* Put some color into the buffers */
+	/*
+		memset(isi->video_buffer[i].frame_buffer, (i*4)%0xFF, 
+			video_buffer_size); 
+			*/
+#endif
+	}
+	/* set up frame buffer descriptor list for ISI module*/
+	/* FIXME 
+	isi->fbd_list_start = dma_map_single(&pdev->dev,
+		&isi->video_buffer[0].fb_desc,
+		sizeof(struct fbd),
+		DMA_NONE);
+		*/
+	isi->fbd_list_start = __pa(&isi->video_buffer[0].fb_desc);
+	for(i=0; i < (video_buffers - 1); i++){
+		isi->video_buffer[i].fb_desc.next_fbd_address =
+		/*
+			dma_map_single(&pdev->dev, 
+				&isi->video_buffer[i+1].fb_desc,
+				sizeof(struct fbd),
+				DMA_NONE);*/
+			__pa(&isi->video_buffer[i+1]);
+	}
+	/* FIXME
+	 * isi->video_buffer[i].fb_desc.next_fbd_address =
+	 * 	isi->fbd_list_start;
+	 */
+	isi->video_buffer[i].fb_desc.next_fbd_address = 
+		__pa(&isi->video_buffer[0]);
+	
+#ifdef DEBUG
+	for(i=0;i < video_buffers; i++){
+		pr_debug("atmel_isi: fbd at %08lx video buffer at \
+phys addr %08lx \n", __pa(&isi->video_buffer[i]),
+		(unsigned long) isi->video_buffer[i].fb_desc.fb_address);
+	}
+#endif
+	dev_info(&pdev->dev,
+		 "capture buffer: %d bytes at %p (phys 0x%08x)\n",
+		 capture_buffer_size, isi->capture_buf,
+		 isi->capture_phys);
+	
+	spin_lock_init(&isi->grabq_lock);
+	isi->grabq = kfifo_alloc(sizeof(int) * video_buffers, GFP_KERNEL,
+		&isi->grabq_lock);
+	if(IS_ERR(isi->grabq)){
+		dev_err(&pdev->dev, "fifo allocation failed\n");
+		goto err_fifo_alloc1;
+	}
+	spin_lock_init(&isi->doneq_lock);
+	isi->doneq = kfifo_alloc(sizeof(int) * video_buffers, GFP_KERNEL,
+		&isi->doneq_lock);
+	if(IS_ERR(isi->doneq)){
+		dev_err(&pdev->dev, "fifo allocation failed\n");
+		goto err_fifo_alloc2;
+	}
+
+	isi_writel(isi, CR1, ISI_BIT(DIS));
+	
+	ret = video_register_device(&isi->cdev, VFL_TYPE_GRABBER, -1);
+	if(ret)
+		goto err_register1;
+
+	ret = video_register_device(&isi->vdev, VFL_TYPE_GRABBER, -1);
+	if (ret)
+		goto err_register2;
+
+	platform_set_drvdata(pdev, isi);
+
+	dev_info(&pdev->dev, "Atmel ISI V4L2 device at 0x%08lx\n",
+		 (unsigned long)regs->start);
+
+	return 0;
+
+err_register2:
+	video_unregister_device(&isi->cdev);
+err_register1:
+	kfifo_free(isi->doneq);
+err_fifo_alloc2:
+	kfifo_free(isi->grabq);
+err_fifo_alloc1:
+err_alloc_vbuf:
+	while(i--)
+		dma_free_coherent(&pdev->dev, video_buffer_size,
+				isi->video_buffer[i].frame_buffer,
+				isi->video_buffer[i].fb_desc.fb_address);
+	dma_free_coherent(&pdev->dev, capture_buffer_size,
+				isi->capture_buf,
+				isi->capture_phys);
+err_alloc_cbuf:
+        free_irq(isi->irq, isi);
+err_req_irq:
+	iounmap(isi->regs);
+err_ioremap:
+	kfree(isi);
+err_alloc_isi:
+	clk_disable(hclk);
+	clk_disable(pclk);
+	clk_put(hclk);
+err_hclk:
+	clk_put(pclk);
+
+	return ret;
+
+}
+
+static struct platform_driver avr32_isi_driver = {
+	.probe		= avr32_isi_probe,
+	.remove		= __exit_p(avr32_isi_remove),
+	.driver		= {
+		.name = "atmel_isi",
+		.owner = THIS_MODULE,
+	},
+};
+
+static int __init avr32_isi_init(void)
+{
+	return platform_driver_probe(&avr32_isi_driver, &avr32_isi_probe);
+
+/*FIXME	return  platform_driver_register(&avr32_isi_driver);*/
+}
+
+
+static void __exit avr32_isi_exit(void)
+{
+	platform_driver_unregister(&avr32_isi_driver);
+}
+
+
+module_init(avr32_isi_init);
+module_exit(avr32_isi_exit);
+
+MODULE_AUTHOR("Lars Häring <lharing@atmel.com>");
+MODULE_DESCRIPTION("The V4L2 driver for AVR32 Linux");
+MODULE_LICENSE("GPL");
+MODULE_SUPPORTED_DEVICE("video");
diff --git a/drivers/media/video/atmel-isi.h b/drivers/media/video/atmel-isi.h
new file mode 100644
index 0000000..2aa3c14
--- /dev/null
+++ b/drivers/media/video/atmel-isi.h
@@ -0,0 +1,252 @@
+/*
+ * Register definitions for the Atmel Image Sensor Interface.
+ *
+ * Copyright (C) 2006 Atmel Corporation
+ *
+ * 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.
+ */
+#ifndef __ASM_AVR32_ISI_H__
+#define __ASM_AVR32_ISI_H__
+
+#include <linux/videodev2.h>
+
+/* ISI register offsets */
+#define ISI_CR1					0x0000
+#define ISI_CR2					0x0004
+#define ISI_SR					0x0008
+#define ISI_IER					0x000c
+#define ISI_IDR					0x0010
+#define ISI_IMR					0x0014
+#define ISI_PSIZE				0x0020
+#define ISI_PDECF				0x0024
+#define ISI_PPFBD				0x0028
+#define ISI_CDBA				0x002c
+#define ISI_Y2R_SET0				0x0030
+#define ISI_Y2R_SET1				0x0034
+#define ISI_R2Y_SET0				0x0038
+#define ISI_R2Y_SET1				0x003c
+#define ISI_R2Y_SET2				0x0040
+
+/* Bitfields in CR1 */
+#define ISI_RST_OFFSET				0
+#define ISI_RST_SIZE				1
+#define ISI_DIS_OFFSET				1
+#define ISI_DIS_SIZE				1
+#define ISI_HSYNC_POL_OFFSET			2
+#define ISI_HSYNC_POL_SIZE			1
+#define ISI_VSYNC_POL_OFFSET			3
+#define ISI_VSYNC_POL_SIZE			1
+#define ISI_PIXCLK_POL_OFFSET			4
+#define ISI_PIXCLK_POL_SIZE			1
+#define ISI_EMB_SYNC_OFFSET			6
+#define ISI_EMB_SYNC_SIZE			1
+#define ISI_CRC_SYNC_OFFSET			7
+#define ISI_CRC_SYNC_SIZE			1
+#define ISI_FRATE_OFFSET			8
+#define ISI_FRATE_SIZE				3
+#define ISI_FULL_OFFSET				12
+#define ISI_FULL_SIZE				1
+#define ISI_THMASK_OFFSET			13
+#define ISI_THMASK_SIZE				2
+#define ISI_CODEC_ON_OFFSET			15
+#define ISI_CODEC_ON_SIZE			1
+#define ISI_SLD_OFFSET				16
+#define ISI_SLD_SIZE				8
+#define ISI_SFD_OFFSET				24
+#define ISI_SFD_SIZE				8
+
+/* Bitfields in CR2 */
+#define ISI_IM_VSIZE_OFFSET			0
+#define ISI_IM_VSIZE_SIZE			11
+#define ISI_GS_MODE_OFFSET			11
+#define ISI_GS_MODE_SIZE			1
+#define ISI_RGB_MODE_OFFSET			12
+#define ISI_RGB_MODE_SIZE			1
+#define ISI_GRAYSCALE_OFFSET			13
+#define ISI_GRAYSCALE_SIZE			1
+#define ISI_RGB_SWAP_OFFSET			14
+#define ISI_RGB_SWAP_SIZE			1
+#define ISI_COL_SPACE_OFFSET			15
+#define ISI_COL_SPACE_SIZE			1
+#define ISI_IM_HSIZE_OFFSET			16
+#define ISI_IM_HSIZE_SIZE			11
+#define ISI_YCC_SWAP_OFFSET			28
+#define ISI_YCC_SWAP_SIZE			2
+#define ISI_RGB_CFG_OFFSET			30
+#define ISI_RGB_CFG_SIZE			2
+
+/* Bitfields in SR */
+#define ISI_CDC_STATUS_OFFSET			3
+#define ISI_CDC_STATUS_SIZE			1
+
+/* Bitfields in SR/IER/IDR/IMR */
+#define ISI_SOF_OFFSET				0
+#define ISI_SOF_SIZE				1
+#define ISI_SOFTRST_OFFSET			2
+#define ISI_SOFTRST_SIZE			1
+#define ISI_CRC_ERR_OFFSET			4
+#define ISI_CRC_ERR_SIZE			1
+#define ISI_FO_C_OVF_OFFSET			5
+#define ISI_FO_C_OVF_SIZE			1
+#define ISI_FO_P_OVF_OFFSET			6
+#define ISI_FO_P_OVF_SIZE			1
+#define ISI_FO_P_EMP_OFFSET			7
+#define ISI_FO_P_EMP_SIZE			1
+#define ISI_FO_C_EMP_OFFSET			8
+#define ISI_FO_C_EMP_SIZE			1
+#define ISI_FR_OVR_OFFSET			9
+#define ISI_FR_OVR_SIZE				1
+
+/* Bitfields in PSIZE */
+#define ISI_PREV_VSIZE_OFFSET			0
+#define ISI_PREV_VSIZE_SIZE			10
+#define ISI_PREV_HSIZE_OFFSET			16
+#define ISI_PREV_HSIZE_SIZE			10
+
+/* Bitfields in PCDEF */
+#define ISI_DEC_FACTOR_OFFSET			0
+#define ISI_DEC_FACTOR_SIZE			8
+
+/* Bitfields in PPFBD */
+#define ISI_PREV_FBD_ADDR_OFFSET		0
+#define ISI_PREV_FBD_ADDR_SIZE			32
+
+/* Bitfields in CDBA */
+#define ISI_CODEC_DMA_ADDR_OFFSET		0
+#define ISI_CODEC_DMA_ADDR_SIZE			32
+
+/* Bitfields in Y2R_SET0 */
+#define ISI_Y2R_SET0_C3_OFFSET			24
+#define ISI_Y2R_SET0_C3_SIZE			8
+
+/* Bitfields in Y2R_SET1 */
+#define ISI_Y2R_SET1_C4_OFFSET			0
+#define ISI_Y2R_SET1_C4_SIZE			9
+#define ISI_YOFF_OFFSET				12
+#define ISI_YOFF_SIZE				1
+#define ISI_CROFF_OFFSET			13
+#define ISI_CROFF_SIZE				1
+#define ISI_CBOFF_OFFSET			14
+#define ISI_CBOFF_SIZE				1
+
+/* Bitfields in R2Y_SET0 */
+#define ISI_C0_OFFSET				0
+#define ISI_C0_SIZE				8
+#define ISI_C1_OFFSET				8
+#define ISI_C1_SIZE				8
+#define ISI_C2_OFFSET				16
+#define ISI_C2_SIZE				8
+#define ISI_ROFF_OFFSET				24
+#define ISI_ROFF_SIZE				1
+
+/* Bitfields in R2Y_SET1 */
+#define ISI_R2Y_SET1_C3_OFFSET			0
+#define ISI_R2Y_SET1_C3_SIZE			8
+#define ISI_R2Y_SET1_C4_OFFSET			8
+#define ISI_R2Y_SET1_C4_SIZE			8
+#define ISI_C5_OFFSET				16
+#define ISI_C5_SIZE				8
+#define ISI_GOFF_OFFSET				24
+#define ISI_GOFF_SIZE				1
+
+/* Bitfields in R2Y_SET2 */
+#define ISI_C6_OFFSET				0
+#define ISI_C6_SIZE				8
+#define ISI_C7_OFFSET				8
+#define ISI_C7_SIZE				8
+#define ISI_C8_OFFSET				16
+#define ISI_C8_SIZE				8
+#define ISI_BOFF_OFFSET				24
+#define ISI_BOFF_SIZE				1
+
+/* Constants for FRATE */
+#define ISI_FRATE_CAPTURE_ALL			0
+
+/* Constants for YCC_SWAP */
+#define ISI_YCC_SWAP_DEFAULT			0
+#define ISI_YCC_SWAP_MODE_1			1
+#define ISI_YCC_SWAP_MODE_2			2
+#define ISI_YCC_SWAP_MODE_3			3
+
+/* Constants for RGB_CFG */
+#define ISI_RGB_CFG_DEFAULT			0
+#define ISI_RGB_CFG_MODE_1			1
+#define ISI_RGB_CFG_MODE_2			2
+#define ISI_RGB_CFG_MODE_3			3
+
+/* Bit manipulation macros */
+#define ISI_BIT(name)					\
+	(1 << ISI_##name##_OFFSET)
+#define ISI_BF(name,value)				\
+	(((value) & ((1 << ISI_##name##_SIZE) - 1))	\
+	 << ISI_##name##_OFFSET)
+#define ISI_BFEXT(name,value)				\
+	(((value) >> ISI_##name##_OFFSET)		\
+	 & ((1 << ISI_##name##_SIZE) - 1))
+#define ISI_BFINS(name,value,old)			\
+	(((old) & ~(((1 << ISI_##name##_SIZE) - 1)	\
+		    << ISI_##name##_OFFSET))\
+	 | ISI_BF(name,value))
+
+/* Register access macros */
+#define isi_readl(port,reg)				\
+	__raw_readl((port)->regs + ISI_##reg)
+#define isi_writel(port,reg,value)			\
+	__raw_writel((value), (port)->regs + ISI_##reg)
+
+#define ATMEL_V4L2_VID_FLAGS ( V4L2_CAP_VIDEO_OUTPUT )
+
+struct atmel_isi;
+
+enum atmel_isi_pixfmt {
+	ATMEL_ISI_PIXFMT_GREY,		/* Greyscale */
+	ATMEL_ISI_PIXFMT_CbYCrY,
+	ATMEL_ISI_PIXFMT_CrYCbY,
+	ATMEL_ISI_PIXFMT_YCbYCr,
+	ATMEL_ISI_PIXFMT_YCrYCb,
+	ATMEL_ISI_PIXFMT_RGB24,
+	ATMEL_ISI_PIXFMT_BGR24,
+	ATMEL_ISI_PIXFMT_RGB16,
+	ATMEL_ISI_PIXFMT_BGR16,
+	ATMEL_ISI_PIXFMT_GRB16,		/* G[2:0] R[4:0]/B[4:0] G[5:3] */
+	ATMEL_ISI_PIXFMT_GBR16,		/* G[2:0] B[4:0]/R[4:0] G[5:3] */
+	ATMEL_ISI_PIXFMT_RGB24_REV,
+	ATMEL_ISI_PIXFMT_BGR24_REV,
+	ATMEL_ISI_PIXFMT_RGB16_REV,
+	ATMEL_ISI_PIXFMT_BGR16_REV,
+	ATMEL_ISI_PIXFMT_GRB16_REV,	/* G[2:0] R[4:0]/B[4:0] G[5:3] */
+	ATMEL_ISI_PIXFMT_GBR16_REV,	/* G[2:0] B[4:0]/R[4:0] G[5:3] */
+};
+
+struct atmel_isi_format {
+	struct v4l2_pix_format pix;
+	enum atmel_isi_pixfmt input_format;
+};
+
+struct atmel_isi_camera {
+	const char		*name;
+	struct module		*owner;
+	struct list_head	list;
+	unsigned int		hsync_act_low:1;
+	unsigned int		vsync_act_low:1;
+	unsigned int		pclk_act_falling:1;
+	unsigned int		has_emb_sync:1;
+	/* ISI supports up to 17 formats */
+	unsigned int		pixelformats[17];
+	int (*get_format)(struct atmel_isi_camera *cam,
+			  struct atmel_isi_format *fmt);
+	int (*set_format)(struct atmel_isi_camera *cam,
+			  struct atmel_isi_format *fmt);
+	int (*start_capture)(struct atmel_isi_camera *cam);
+	int (*stop_capture)(struct atmel_isi_camera *cam);
+	struct atmel_isi	*isi;
+};
+
+extern int atmel_isi_register_camera(struct atmel_isi_camera *cam);
+extern void atmel_isi_unregister_camera(struct atmel_isi_camera *cam);
+
+
+#endif /* __ASM_AVR32_ISI_H__ */
+
diff --git a/drivers/media/video/Kconfig b/drivers/media/video/Kconfig
index 7558484..a8cdf42 100644
--- a/drivers/media/video/Kconfig
+++ b/drivers/media/video/Kconfig
@@ -13,6 +13,20 @@ menuconfig VIDEO_CAPTURE_DRIVERS
 
 if VIDEO_CAPTURE_DRIVERS && VIDEO_DEV
 
+config VIDEO_AVR32_ISI
+	tristate "AVR32 video support"
+	depends on VIDEO_DEV
+	---help---
+	  This module makes the AVR32 Image Sensor Interface available 
+
+config VIDEO_MT9M112
+	tristate "Micron MT9M112 camera"
+	default n
+	depends on VIDEO_AVR32_ISI && I2C
+	---help---
+	 This will add support for the Micron MT9M112 camera.
+	  as a v4l2 device.
+
 config VIDEO_ADV_DEBUG
 	bool "Enable advanced debug functionality"
 	default n
diff --git a/drivers/media/video/Makefile b/drivers/media/video/Makefile
index 78e38d0..3156969 100644
--- a/drivers/media/video/Makefile
+++ b/drivers/media/video/Makefile
@@ -77,7 +77,8 @@ obj-$(CONFIG_VIDEO_HEXIUM_ORION) += hexium_orion.o
 obj-$(CONFIG_VIDEO_HEXIUM_GEMINI) += hexium_gemini.o
 obj-$(CONFIG_VIDEO_DPC) += dpc7146.o
 obj-$(CONFIG_TUNER_3036) += tuner-3036.o
 obj-$(CONFIG_VIDEO_AVR32_ISI) += atmel-isi.o
+obj-$(CONFIG_VIDEO_MT9M112) += tm13m3.o
 
 obj-$(CONFIG_VIDEO_TUNER) += tuner.o
 obj-$(CONFIG_VIDEO_BUF)   += video-buf.o
diff --git a/drivers/media/video/tm13m3.c b/drivers/media/video/tm13m3.c
new file mode 100644
index 0000000..42f0fd3
--- /dev/null
+++ b/drivers/media/video/tm13m3.c
@@ -0,0 +1,631 @@
+/*
+ * Micron Mt9M112 camera driver.
+ *
+ * Copyright (C) 2005-2007 Atmel Corporation
+ *
+ * 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.
+ */
+//#define DEBUG
+
+#include <linux/clk.h>
+#include <linux/module.h>
+#include <linux/init.h>
+#include <linux/interrupt.h>
+#include <linux/io.h>
+#include <linux/device.h>
+#include <linux/list.h>
+#include <linux/delay.h>
+#include <linux/i2c.h>
+
+#include <linux/err.h>
+#include <asm/gpio.h>
+#include <asm/arch/board.h>
+#include <asm/arch/at32ap700x.h>
+
+#include "atmel-isi.h"
+
+/* camera standby pin */
+#define CAM_STANDBY GPIO_PIN_PA(9) 
+/* camera reset pin */
+#define CAM_RESET GPIO_PIN_PA(8)
+
+/*! Maximum number of pixels in a row */
+#define TM13M3_MAX_WIDTH	1280
+/*! Maximum number of rows */
+#define TM13M3_MAX_HEIGHT	1024
+
+/*! Clock for image sensor CLKIN signal */
+static char mclk_name[32] = "gclk0";
+/*! Parent clock of gclk0 
+ *  Either osc0 or pll0
+ *  We use osc0 with 20MHz quarz.
+ */
+static char mclk_parent_name[32] = "osc0";
+
+static struct clk *mclk;
+static struct clk *mclk_parent;
+module_param_string(mclk, mclk_name, sizeof(mclk_name), 0644);
+MODULE_PARM_DESC(mclk, "Name of the clock used as camera clock input");
+
+module_param_string(mclk_parent, mclk_parent_name,
+		    sizeof(mclk_parent_name), 0644);
+MODULE_PARM_DESC(mclk, "Name of mclk parent clock");
+
+
+/* Register adresses */
+#define CHIP_VERSION		0x0
+#define PROGRAM_CONTROL		0x2CC
+#define READ_MODE_CONTEXT_B	0x20
+#define CONTEXT_CONTROL		0xC8
+#define COLUMN_WIDTH		0x4
+#define HORIZONTAL_OUTPUT_SIZE_B	0x1A1
+#define VERTICAL_OUTPUT_SIZE_B	0x1A4
+#define ROW_WIDTH		0x3
+#define PAGE_MAP		0xF0
+#define OUTPUT_FORMAT_CONTROL_A	0x13A
+#define HORIZONTAL_ZOOM	0x1A6
+#define VERTICAL_ZOOM	0x1A9
+#define PLL_CONTROL_1	0x66
+#define PLL_CONTROL_2	0x67
+#define CLOCK_CONTROL	0x65
+
+/* Chip ID stored in CHIP_VERSION register */
+#define MT9M112_CHIP_ID 0x148C
+/* I2C address of camera module */
+#define I2C_TM13M3	0x5D
+
+static unsigned short normal_i2c[] = {
+	I2C_TM13M3,
+	I2C_CLIENT_END
+};
+I2C_CLIENT_INSMOD;
+
+#ifdef CONFIG_DEBUG_FS
+struct reg_dbg {
+	struct tm13m3 *is;
+	struct dentry *dentry;
+	unsigned int offset;
+};
+#endif
+
+struct tm13m3 {
+	struct mutex		mutex;
+	u16			current_page;
+	u32			current_format;
+	u16			pll_avr_ctrl;
+	struct clk		*mclk;
+	struct i2c_client	client;
+	struct atmel_isi_camera	cam;
+#ifdef CONFIG_DEBUG_FS
+	struct dentry		*debugfs_root;
+	struct reg_dbg		debugfs_reg[37];
+#endif
+};
+
+
+#define to_tm13m3(cam) container_of(cam, struct tm13m3, cam)
+
+static struct i2c_driver tm13m3_driver;
+
+static int tm13m3_write_16(struct tm13m3 *is, u16 reg, u16 value)
+{
+	int ret = 0;
+	u16 register_page = 0;
+
+	register_page = reg >> 8;
+
+	if ((register_page  !=  is->current_page)
+		&& (reg != PAGE_MAP)){
+
+		if( 0 <= (ret = i2c_smbus_write_word_data(&is->client, PAGE_MAP, cpu_to_le16(register_page))))
+			is->current_page = register_page;
+	} 
+
+	if(ret >= 0){
+		ret = i2c_smbus_write_word_data(&is->client, (u8) reg, cpu_to_le16(value));
+	}
+	return ret;
+}
+
+static int tm13m3_read_16(struct tm13m3 *is, u16 reg)
+{
+	int ret = 0;
+	u16 register_page = 0;
+
+	register_page = reg >> 8;
+
+	if ((register_page  !=  is->current_page)
+		&& (reg != PAGE_MAP)){
+
+		if( 0 <= (ret = i2c_smbus_write_word_data(&is->client, PAGE_MAP, cpu_to_le16(register_page))))
+			is->current_page = register_page;
+	} 
+
+if(ret >=  0){
+		ret = i2c_smbus_read_word_data(&is->client, (u8) reg);
+	}
+
+	if (ret < 0)
+		return -EIO;
+
+	return le16_to_cpu(ret);
+}
+
+#ifdef CONFIG_DEBUG_FS
+#include <linux/debugfs.h>
+#include <linux/uaccess.h>
+
+struct tm13m3_reg {
+	u16 address;
+	const char *name;
+};
+
+static struct tm13m3_reg tm13m3_registers[38] = {
+	{ .address = CHIP_VERSION, .name = "chip_version"},
+	{ .address = 0x1, .name = "row_start"},
+	{ .address = 0x2, .name = "column_start"},
+	{ .address = 0x3, .name = "row_width"},
+	{ .address = 0x4, .name = "column_width"},
+	{ .address = 0x5, .name = "horizontal_blanking_b"},
+	{ .address = 0x6, .name = "vertical_blanking_b"},
+	{ .address = 0x7, .name = "horizontal_blanking_a"},
+	{ .address = 0x8, .name = "vertical_blanking_a"},
+	{ .address = 0x0D, .name = "reset"},
+	{ .address = 0x20, .name = "read_mode_context_b"},
+	{ .address = 0x21, .name = "read_mode_context_a"},
+	{ .address = 0x22, .name = "dark_col_row"},
+	{ .address = 0x65, .name = "clock_control"},
+	{ .address = 0x66, .name = "pll_control_1"},
+	{ .address = 0x67, .name = "pll_control_2"},
+	{ .address = 0xC8, .name = "context_control"},
+	{ .address = 0x106, .name = "mode_control"},
+	{ .address = 0x108, .name = "format_control"},
+	{ .address = 0x13A, .name = "output_format_control_a"},
+	{ .address = 0x148, .name = "test_pattern_generator"},
+	{ .address = 0x19B, .name = "output_format_control_b"},
+	{ .address = 0x1A1, .name = "horizontal_output_size_b"},
+	{ .address = 0x1A4, .name = "vertical_output_size_b"},
+	{ .address = 0x1A5, .name = "horizontal_pan"},
+	{ .address = 0x1A6, .name = "horizontal_zoom"},
+	{ .address = 0x1A7, .name = "horizontal_output_size_a"},
+	{ .address = 0x1A8, .name = "vertical_pan"},
+	{ .address = 0x1A9, .name = "vertical_zoom"},
+	{ .address = 0x1AA, .name = "vertical_output_size_a"},
+	{ .address = 240,  .name = "page_map"},
+	{ .address = 0x2C8, .name = "global_context_control"},
+	{ .address = 0x2CB, .name = "program_advance"},
+	{ .address = 0x2CC, .name = "program_control"},
+	{ .address = 0x2D2, .name = "default_program_conf"},
+	{ .address = 0x2D3, .name = "user_global_context_control"},
+	{ .address = (0x100 | 0), .name = "module_id"},
+	{ .address = (0x200 | 2), .name = "mode_control"},
+};
+
+static u64 reg_dbg_get(void *data)
+{
+	struct reg_dbg *reg = data;
+	int ret = 0;
+
+	mutex_lock(&reg->is->mutex);	
+	ret = tm13m3_read_16(reg->is, tm13m3_registers[reg->offset].address);
+	mutex_unlock(&reg->is->mutex);
+
+	if (ret < 0) {
+		printk("%s: failed to read reg 0x%02x: %d\n",
+		       reg->is->cam.name, 
+		       tm13m3_registers[reg->offset].address, ret);
+		return ~0ULL;
+	}
+	return ret;
+}
+
+static void reg_dbg_set(void *data, u64 val)
+{
+	struct reg_dbg *reg = data;
+	int ret = 0;
+	
+	mutex_lock(&reg->is->mutex);
+	ret = tm13m3_write_16(reg->is, tm13m3_registers[reg->offset].address, (u16) val);
+	mutex_unlock(&reg->is->mutex);
+
+	if (ret < 0){
+		printk("%s: failed to write reg 0x%02x: %d\n",
+			reg->is->cam.name,
+			tm13m3_registers[reg->offset].address, ret);
+	}
+}
+DEFINE_SIMPLE_ATTRIBUTE(reg_dbg_fops, reg_dbg_get, reg_dbg_set, "%04llx\n");
+
+static void tm13m3_init_debugfs(struct tm13m3 *is)
+{
+	struct dentry *root, *reg;
+	unsigned int i;
+
+	root = debugfs_create_dir(is->cam.name, NULL);
+	if (IS_ERR(root) || !root)
+		goto err_root;
+	is->debugfs_root = root;
+
+	for (i = 0; i < ARRAY_SIZE(is->debugfs_reg); i++) {
+		if (!tm13m3_registers[i].name)
+			continue;
+
+		is->debugfs_reg[i].is = is;
+		is->debugfs_reg[i].offset = i;
+
+		reg = debugfs_create_file(tm13m3_registers[i].name, S_IRUGO | S_IWUSR,
+					  root, &is->debugfs_reg[i],
+					  &reg_dbg_fops);
+		if (!reg)
+			goto err_reg;
+		is->debugfs_reg[i].dentry = reg;
+	}
+
+	return;
+
+err_reg:
+	while (i--)
+		debugfs_remove(is->debugfs_reg[i].dentry);
+	debugfs_remove(root);
+err_root:
+	is->debugfs_root = NULL;
+	printk(KERN_ERR "%s: failed to initialize debugfs\n",
+	       is->cam.name);
+}
+
+static void tm13m3_cleanup_debugfs(struct tm13m3 *is)
+{
+	unsigned int i;
+
+	if (is->debugfs_root) {
+		for (i = 0; i < ARRAY_SIZE(is->debugfs_reg); i++)
+			debugfs_remove(is->debugfs_reg[i].dentry);
+		debugfs_remove(is->debugfs_root);
+	}
+}
+#else
+static inline void tm13m3_init_debugfs(struct tm13m3 *is)
+{
+
+}
+
+static inline void tm13m3_cleanup_debugfs(struct tm13m3 *is)
+{
+
+}
+#endif /* CONFIG_DEBUG_FS */
+
+static int tm13m3_get_format(struct atmel_isi_camera *cam,
+			   struct atmel_isi_format *fmt)
+{
+	struct tm13m3 *is = to_tm13m3(cam);
+	int ret = 0;
+
+	fmt->pix.colorspace = V4L2_COLORSPACE_SMPTE170M;
+	fmt->input_format = ATMEL_ISI_PIXFMT_CbYCrY;
+	fmt->input_format = is->current_format;
+
+	fmt->pix.width = 320;
+	fmt->pix.height = 240;
+
+	return ret;
+}
+
+static int tm13m3_set_format(struct atmel_isi_camera *cam,
+			   struct atmel_isi_format *fmt)
+{
+	struct tm13m3 *is = to_tm13m3(cam);
+	int ret = 0;
+
+	fmt->pix.colorspace = V4L2_COLORSPACE_SMPTE170M;
+/*
+	switch(fmt->input_format){
+	case ATMEL_ISI_PIXFMT_CbYCrY:
+		is->current_format = ATMEL_ISI_PIXFMT_CbYCrY;
+		break;	
+	case ATMEL_ISI_PIXFMT_YCbYCr:
+		is->current_format = ATMEL_ISI_PIXFMT_YCbYCr;
+		break;
+	case ATMEL_ISI_PIXFMT_CrYCbY:
+		is->current_format = ATMEL_ISI_PIXFMT_CrYCbY;
+		break;
+	case ATMEL_ISI_PIXFMT_YCrYCb:
+		is->current_format = ATMEL_ISI_PIXFMT_YCrYCb;
+		break;
+	default:
+		// force a valid format
+		fmt->input_format = ATMEL_ISI_PIXFMT_CbYCrY;
+		is->current_format = ATMEL_ISI_PIXFMT_CbYCrY;
+		pr_debug("%s: Not supported format, forcing default format\n",
+			cam->name);
+		break;
+	}
+*/
+	fmt->input_format = ATMEL_ISI_PIXFMT_CrYCbY;
+	is->current_format = ATMEL_ISI_PIXFMT_CrYCbY;
+
+	/* adjust picture width and height */
+	if (fmt->pix.width > TM13M3_MAX_WIDTH)
+		fmt->pix.width = TM13M3_MAX_WIDTH;
+	if (fmt->pix.height > TM13M3_MAX_HEIGHT)
+		fmt->pix.height = TM13M3_MAX_HEIGHT;
+
+	//tm13m3_write_16(is, COLUMN_WIDTH, fmt->pix.width);
+	//tm13m3_write_16(is, ROW_WIDTH, fmt->pix.height);
+	//tm13m3_write_16(is, HORIZONTAL_ZOOM, fmt->pix.width);
+	//tm13m3_write_16(is, VERTICAL_ZOOM, fmt->pix.height);
+
+	//tm13m3_write_16(is, HORIZONTAL_OUTPUT_SIZE_B, fmt->pix.width);
+	//tm13m3_write_16(is, VERTICAL_OUTPUT_SIZE_B, fmt->pix.height);
+
+	/* FIXME Set context output width needed ??*/
+
+	pr_debug("%s: set_format %ux%u\n", cam->name,
+		 fmt->pix.width, fmt->pix.height);
+	return ret;
+}
+
+static void tm13m3_reset_soft(struct tm13m3 *is)
+{
+	tm13m3_write_16(is, 0x0D, 0x0001);
+	/*FIXME test if toggling is really needed */
+	tm13m3_write_16(is, 0x0D, 0x0000);
+}
+
+static void tm13m3_reset_hardware(struct tm13m3 *is)
+{
+	gpio_set_value(CAM_RESET, 0);
+	//FIXME : set correct reset interval usleep();
+	gpio_set_value(CAM_RESET, 1);
+}
+
+static int tm13m3_start_capture(struct atmel_isi_camera *cam)
+{
+	struct tm13m3 *is = to_tm13m3(cam);
+	int ret = 0;
+
+	return ret;
+}
+
+static int tm13m3_stop_capture(struct atmel_isi_camera *cam)
+{
+	struct tm13m3 *is = to_tm13m3(cam);
+	int ret = 0;
+
+
+	return ret;
+}
+
+static int tm13m3_init_hardware(struct tm13m3 *is)
+{
+	int chip_id;
+
+	tm13m3_reset_hardware(is);
+	/* set register page to reset value*/
+	is->current_page = 0;
+	is->current_format = ATMEL_ISI_PIXFMT_CbYCrY;
+
+	pr_debug("tm13m3: Init sensor\n");
+	/* Try to identify the camera */
+	chip_id = tm13m3_read_16(is, CHIP_VERSION);
+	if (chip_id < 0)
+		return -EIO;
+
+	if (chip_id != MT9M112_CHIP_ID) {
+		printk(KERN_ERR "%s: Unknown chip ID 0x%04x\n",
+		       is->cam.name, chip_id);
+		return -ENODEV;
+	}
+#if 0
+	/* Configure pll for 36,8 MHz with CLKIN = 20MHz
+	 * fout = fclkin * M * 1 /( 2* (N+1) * (P+1))
+	 */
+	/* Set P = 2  */
+	tm13m3_write_16(is, PLL_CONTROL_2, 0x0502);
+	/* M = 22, N = 1*/
+	tm13m3_write_16(is, PLL_CONTROL_1, 0x1601);
+	/* wake up pll*/
+	tm13m3_write_16(is, CLOCK_CONTROL, 0x8000);
+	/* wait until pll has stabilized */
+	mdelay(1);
+	/* set pll as master clock*/
+	tm13m3_write_16(is, CLOCK_CONTROL, 0x0000);
+
+#endif
+	/* Set semi-auto mode program mode*/
+	tm13m3_write_16(is, PROGRAM_CONTROL, 0x0010);
+	/* set context B read mode */
+	tm13m3_write_16(is, READ_MODE_CONTEXT_B, 0x0100);
+	/* switch to read+resize context B */
+	tm13m3_write_16(is, CONTEXT_CONTROL, 0x0408);
+	/* set ITU-R BT.656 codes */
+	tm13m3_write_16(is, OUTPUT_FORMAT_CONTROL_A, 0x0A00);
+	/* set sensor image size */ 
+	tm13m3_write_16(is, HORIZONTAL_ZOOM, 320);
+	tm13m3_write_16(is, VERTICAL_ZOOM, 240);
+	tm13m3_write_16(is, HORIZONTAL_OUTPUT_SIZE_B, 320);
+	tm13m3_write_16(is, VERTICAL_OUTPUT_SIZE_B, 240);
+	tm13m3_write_16(is, COLUMN_WIDTH, 320);
+	tm13m3_write_16(is, ROW_WIDTH, 240);
+	return 0;
+}
+static int tm13m3_detect_client(struct i2c_adapter *adapter,
+			      int address, int kind)
+{
+	struct i2c_client *client;
+	struct tm13m3 *is;
+	int ret;
+
+	pr_debug("tm13m3: detecting client on address 0x%x\n", address);
+
+	/* Check if the adapter supports the needed features */
+	if (!i2c_check_functionality(adapter,
+				     (I2C_FUNC_SMBUS_READ_BYTE_DATA
+				      | I2C_FUNC_SMBUS_WRITE_BYTE_DATA
+				      | I2C_FUNC_SMBUS_READ_WORD_DATA
+				      | I2C_FUNC_SMBUS_WRITE_WORD_DATA)))
+		return 0;
+
+	is = kzalloc(sizeof(struct tm13m3), GFP_KERNEL);
+	if (!is)
+		return -ENOMEM;
+
+	client = &is->client;
+	client->addr = address;
+	client->adapter = adapter;
+	client->driver = &tm13m3_driver;
+	strcpy(client->name, "tm13m3");
+
+	is->cam.name = client->name;
+	is->cam.hsync_act_low = 0;
+	is->cam.vsync_act_low = 0;
+	is->cam.pclk_act_falling = 0;
+	/* no SAV/EAV sync -> HSYNC and VSYNC used */
+	/*is->cam.has_emb_sync = 0;*/
+	is->cam.has_emb_sync = 1;
+
+	is->cam.get_format = tm13m3_get_format;
+	is->cam.set_format = tm13m3_set_format;
+	is->cam.start_capture = tm13m3_start_capture;
+	is->cam.stop_capture = tm13m3_stop_capture;
+
+	mutex_init(&is->mutex);
+
+	is->mclk = clk_get(NULL, mclk_name);
+	if (IS_ERR(is->mclk)) {
+		ret = PTR_ERR(is->mclk);
+		goto err_clk;
+	}
+	clk_enable(is->mclk);
+
+	ret = i2c_attach_client(client);
+	if (ret)
+		goto err_attach;
+
+	i2c_set_clientdata(client, is);
+
+	ret = tm13m3_init_hardware(is);
+	if (ret)
+		goto err_init_hw;
+
+	/* We're up and running. Notify the ISI driver */
+	ret = atmel_isi_register_camera(&is->cam);
+	if (ret)
+		goto err_register;
+
+	printk(KERN_INFO "TM13M3 Image Sensor at %s:0x%02x\n",
+	       adapter->name, address);
+
+	tm13m3_init_debugfs(is);
+
+	return 0;
+
+err_register:
+err_init_hw:
+//	at76_reset_hardware(is);
+	i2c_detach_client(client);
+err_attach:
+	clk_disable(is->mclk);
+	clk_put(is->mclk);
+err_clk:
+	kfree(is);
+	return ret;
+}
+
+static int tm13m3_attach_adapter(struct i2c_adapter *adapter)
+{
+	pr_debug("tm13m3: starting probe for adapter %s (%u)\n",
+		 adapter->name, adapter->id);
+	return i2c_probe(adapter, &addr_data, &tm13m3_detect_client);
+}
+
+static int tm13m3_detach_client(struct i2c_client *client)
+{
+	struct tm13m3 *is = i2c_get_clientdata(client);
+	int ret;
+
+	tm13m3_cleanup_debugfs(is);
+	atmel_isi_unregister_camera(&is->cam);
+
+	tm13m3_reset_hardware(is);
+
+	ret = i2c_detach_client(client);
+	if (ret)
+		return ret;
+
+	clk_disable(is->mclk);
+	clk_put(is->mclk);
+	kfree(is);
+
+	return 0;
+}
+
+static struct i2c_driver tm13m3_driver = {
+	.driver = {
+		.name	= "tm13m3",
+	},
+	.id		= I2C_DRIVERID_TM13M3,
+	.attach_adapter	= &tm13m3_attach_adapter,
+	.detach_client	= &tm13m3_detach_client,
+};
+
+static int __init tm13m3_init(void)
+{
+	        /*
+         * Set up the master clock, if available. If clk_get() fails,
+         * this hopefully means that the board generates a suitable
+         * master clock some other way, which is fine by us.
+         *
+         * We need to do this before probing the i2c bus, as the
+         * camera won't ack any messages when it doesn't have a clock.
+         */
+        mclk_parent = clk_get(NULL, mclk_parent_name);
+        if (!IS_ERR(mclk_parent))
+                clk_enable(mclk_parent);
+        else {
+                mclk_parent = NULL;
+		pr_debug("tm13m3: No parent clock available\n");
+	}
+
+        mclk = clk_get(NULL, mclk_name);
+        if (!IS_ERR(mclk)) {
+                if (mclk_parent)
+                        clk_set_parent(mclk, mclk_parent);
+
+                clk_set_rate(mclk, 27000000);
+                clk_enable(mclk);
+        } else {
+                mclk = NULL;
+		pr_debug("tm13m3: No clock set\n");
+        }
+
+	gpio_direction_output(CAM_STANDBY, 0);
+	/* Reset sequence */
+	gpio_direction_output(CAM_RESET, 0);
+	udelay(4);
+	gpio_set_value(CAM_RESET, 1);
+
+	return i2c_add_driver(&tm13m3_driver);
+
+}
+module_init(tm13m3_init);
+
+static void __exit tm13m3_exit(void)
+{
+	if (mclk) {
+		clk_disable(mclk);
+		clk_put(mclk);
+	}
+	if (mclk_parent) {
+		clk_disable(mclk_parent);
+		clk_put(mclk_parent);
+	}
+	i2c_del_driver(&tm13m3_driver);
+}
+module_exit(tm13m3_exit);
+
+MODULE_DESCRIPTION("Atmel Image Sensor Interface Driver");
+MODULE_AUTHOR("Lars Häring <lharing@atmel.com>");
+MODULE_LICENSE("GPL");
>From dc4286f6020df0bf791228cdfe7d4ea58e2f46ef Mon Sep 17 00:00:00 2001
From: Haavard Skinnemoen <hskinnemoen@atmel.com>
Date: Wed, 17 Jan 2007 13:47:40 +0100
Subject: [PATCH] AP7000: Add platform_device for ISI

Signed-off-by: Haavard Skinnemoen <hskinnemoen@atmel.com>
---
 arch/avr32/mach-at32ap/at32ap700x.c   |   47 +++++++++++++++++++++++++++++++++
 include/asm-avr32/arch-at32ap/board.h |    1 +
 2 files changed, 48 insertions(+), 0 deletions(-)

diff --git a/arch/avr32/mach-at32ap/at32ap700x.c b/arch/avr32/mach-at32ap/at32ap700x.c
index 1130c8a..4184296 100644
--- a/arch/avr32/mach-at32ap/at32ap700x.c
+++ b/arch/avr32/mach-at32ap/at32ap700x.c
@@ -1396,6 +1396,51 @@ at32_add_device_abdac(unsigned int id)
 }
 
 /* --------------------------------------------------------------------
+ *  ISI
+ * -------------------------------------------------------------------- */
+static struct resource atmel_isi0_resource[] = {
+	PBMEM(0xfff02c00),
+	IRQ(30),
+};
+DEFINE_DEV(atmel_isi, 0);
+DEV_CLK(hclk, atmel_isi0, hsb, 5);
+DEV_CLK(pclk, atmel_isi0, pbb, 11);
+
+struct platform_device *__init
+at32_add_device_isi(unsigned int id)
+{
+	struct platform_device *pdev;
+
+	switch (id) {
+	case 0:
+		pdev = &atmel_isi0_device;
+		select_peripheral(PB(0),  PERIPH_A, 0);	/* DATA0  */
+		select_peripheral(PB(1),  PERIPH_A, 0);	/* DATA1  */
+		select_peripheral(PB(2),  PERIPH_A, 0);	/* DATA2  */
+		select_peripheral(PB(3),  PERIPH_A, 0);	/* DATA3  */
+		select_peripheral(PB(4),  PERIPH_A, 0);	/* DATA4  */
+		select_peripheral(PB(5),  PERIPH_A, 0);	/* DATA5  */
+		select_peripheral(PB(6),  PERIPH_A, 0);	/* DATA6  */
+		select_peripheral(PB(7),  PERIPH_A, 0);	/* DATA7  */
+		select_peripheral(PB(11), PERIPH_B, 0);	/* DATA8  */
+		select_peripheral(PB(12), PERIPH_B, 0);	/* DATA9  */
+		select_peripheral(PB(13), PERIPH_B, 0);	/* DATA10 */
+		select_peripheral(PB(14), PERIPH_B, 0);	/* DATA11 */
+		select_peripheral(PB(8),  PERIPH_A, 0);	/* HSYNC  */
+		select_peripheral(PB(9),  PERIPH_A, 0);	/* VSYNC  */
+		select_peripheral(PB(10), PERIPH_A, 0);	/* PCLK	  */
+		break;
+
+	default:
+		return NULL;
+	}
+
+	platform_device_register(pdev);
+
+	return pdev;
+}
+
+/* --------------------------------------------------------------------
  *  GCLK
  * -------------------------------------------------------------------- */
 static struct clk gclk0 = {
@@ -1493,6 +1538,8 @@ struct clk *at32_clock_list[] = {
 	&gclk2,
 	&gclk3,
 	&gclk4,
+	&atmel_isi0_hclk,
+	&atmel_isi0_pclk,
 };
 unsigned int at32_nr_clocks = ARRAY_SIZE(at32_clock_list);
 
diff --git a/include/asm-avr32/arch-at32ap/board.h b/include/asm-avr32/arch-at32ap/board.h
index 9b36eb8..931f5af 100644
--- a/include/asm-avr32/arch-at32ap/board.h
+++ b/include/asm-avr32/arch-at32ap/board.h
@@ -55,6 +55,7 @@ at32_add_device_lcdc(unsigned int id, struct atmel_lcdfb_info *data,
 
 struct platform_device *at32_add_device_ac97c(unsigned int id);
 struct platform_device *at32_add_device_abdac(unsigned int id);
+struct platform_device *at32_add_device_isi(unsigned int id);
 
 /* depending on what's hooked up, not all SSC pins will be used */
 #define	ATMEL_SSC_TK		0x01
-- 
1.5.2.3

>From 6bac229e6999ce8e761baf97975fc5db774721fa Mon Sep 17 00:00:00 2001
From: Haavard Skinnemoen <hskinnemoen@atmel.com>
Date: Wed, 21 Feb 2007 15:35:44 +0100
Subject: [PATCH] NGW100: Wire up the ISI

Since the NGW100 doesn't actually have a camera on board, this patch
merely serves as an example on how you might wire up the ISI on a
board that does have a camera.
---
 arch/avr32/boards/atngw100/setup.c |    5 +++++
 1 files changed, 5 insertions(+), 0 deletions(-)

diff --git a/arch/avr32/boards/atngw100/setup.c b/arch/avr32/boards/atngw100/setup.c
index d649974..6ca98bb 100644
--- a/arch/avr32/boards/atngw100/setup.c
+++ b/arch/avr32/boards/atngw100/setup.c
@@ -178,6 +178,11 @@ static int __init atngw100_init(void)
 	at32_add_device_twi(0);
 #endif
 
+	at32_add_device_isi(0);
+
+	/* Master clock for the camera (GCLK0) */
+	at32_select_periph(GPIO_PIN_PA(30), GPIO_PERIPH_A, 0);
+
 	return 0;
 }
 postcore_initcall(atngw100_init);
-- 
1.5.2.3