[media] v4l: omap4iss: Add support for OMAP4 camera interface - IPIPE(IF)

/*

 * TI OMAP4 ISS V4L2 Driver - ISP IPIPE module

 *

 * Copyright (C) 2012 Texas Instruments, Inc.

 *

 * Author: Sergio Aguirre <sergio.a.aguirre@gmail.com>

 *

 * This program is free software; you can redistribute it and/or modify

 * it under the terms of the GNU General Public License as published by

 * the Free Software Foundation; either version 2 of the License, or

 * (at your option) any later version.

 */

#include <linux/module.h>

#include <linux/uaccess.h>

#include <linux/delay.h>

#include <linux/device.h>

#include <linux/dma-mapping.h>

#include <linux/mm.h>

#include <linux/sched.h>

#include "iss.h"

#include "iss_regs.h"

#include "iss_ipipe.h"

static struct v4l2_mbus_framefmt *

__ipipe_get_format(struct iss_ipipe_device *ipipe, struct v4l2_subdev_fh *fh,

		  unsigned int pad, enum v4l2_subdev_format_whence which);

static const unsigned int ipipe_fmts[] = {

	V4L2_MBUS_FMT_SGRBG10_1X10,

	V4L2_MBUS_FMT_SRGGB10_1X10,

	V4L2_MBUS_FMT_SBGGR10_1X10,

	V4L2_MBUS_FMT_SGBRG10_1X10,

};

/*

 * ipipe_print_status - Print current IPIPE Module register values.

 * @ipipe: Pointer to ISS ISP IPIPE device.

 *

 * Also prints other debug information stored in the IPIPE module.

 */

#define IPIPE_PRINT_REGISTER(iss, name)\

	dev_dbg(iss->dev, "###IPIPE " #name "=0x%08x\n", \

		readl(iss->regs[OMAP4_ISS_MEM_ISP_IPIPE] + IPIPE_##name))

static void ipipe_print_status(struct iss_ipipe_device *ipipe)

{

	struct iss_device *iss = to_iss_device(ipipe);

	dev_dbg(iss->dev, "-------------IPIPE Register dump-------------\n");

	IPIPE_PRINT_REGISTER(iss, SRC_EN);

	IPIPE_PRINT_REGISTER(iss, SRC_MODE);

	IPIPE_PRINT_REGISTER(iss, SRC_FMT);

	IPIPE_PRINT_REGISTER(iss, SRC_COL);

	IPIPE_PRINT_REGISTER(iss, SRC_VPS);

	IPIPE_PRINT_REGISTER(iss, SRC_VSZ);

	IPIPE_PRINT_REGISTER(iss, SRC_HPS);

	IPIPE_PRINT_REGISTER(iss, SRC_HSZ);

	IPIPE_PRINT_REGISTER(iss, GCK_MMR);

	IPIPE_PRINT_REGISTER(iss, YUV_PHS);

	dev_dbg(iss->dev, "-----------------------------------------------\n");

}

/*

 * ipipe_enable - Enable/Disable IPIPE.

 * @enable: enable flag

 *

 */

static void ipipe_enable(struct iss_ipipe_device *ipipe, u8 enable)

{

	struct iss_device *iss = to_iss_device(ipipe);

	writel((readl(iss->regs[OMAP4_ISS_MEM_ISP_IPIPE] + IPIPE_SRC_EN) &

		~IPIPE_SRC_EN_EN) |

		enable ? IPIPE_SRC_EN_EN : 0,

		iss->regs[OMAP4_ISS_MEM_ISP_IPIPE] + IPIPE_SRC_EN);

}

/* -----------------------------------------------------------------------------

 * Format- and pipeline-related configuration helpers

 */

static void ipipe_configure(struct iss_ipipe_device *ipipe)

{

	struct iss_device *iss = to_iss_device(ipipe);

	struct v4l2_mbus_framefmt *format;

	/* IPIPE_PAD_SINK */

	format = &ipipe->formats[IPIPE_PAD_SINK];

	/* NOTE: Currently just supporting pipeline IN: RGB, OUT: YUV422 */

	writel(IPIPE_SRC_FMT_RAW2YUV,

		iss->regs[OMAP4_ISS_MEM_ISP_IPIPE] + IPIPE_SRC_FMT);

	/* Enable YUV444 -> YUV422 conversion */

	writel(IPIPE_YUV_PHS_LPF,

		iss->regs[OMAP4_ISS_MEM_ISP_IPIPE] + IPIPE_YUV_PHS);

	writel(0, iss->regs[OMAP4_ISS_MEM_ISP_IPIPE] + IPIPE_SRC_VPS);

	writel(0, iss->regs[OMAP4_ISS_MEM_ISP_IPIPE] + IPIPE_SRC_HPS);

	writel((format->height - 2) & IPIPE_SRC_VSZ_MASK,

		iss->regs[OMAP4_ISS_MEM_ISP_IPIPE] + IPIPE_SRC_VSZ);

	writel((format->width - 1) & IPIPE_SRC_HSZ_MASK,

		iss->regs[OMAP4_ISS_MEM_ISP_IPIPE] + IPIPE_SRC_HSZ);

	/* Ignore ipipeif_wrt signal, and operate on-the-fly.  */

	writel(readl(iss->regs[OMAP4_ISS_MEM_ISP_IPIPE] + IPIPE_SRC_MODE) &

		~(IPIPE_SRC_MODE_WRT | IPIPE_SRC_MODE_OST),

		iss->regs[OMAP4_ISS_MEM_ISP_IPIPE] + IPIPE_SRC_MODE);

	/* HACK: Values tuned for Ducati SW (OV) */

	writel(IPIPE_SRC_COL_EE_B |

		IPIPE_SRC_COL_EO_GB |

		IPIPE_SRC_COL_OE_GR |

		IPIPE_SRC_COL_OO_R,

		iss->regs[OMAP4_ISS_MEM_ISP_IPIPE] + IPIPE_SRC_COL);

	/* IPIPE_PAD_SOURCE_VP */

	format = &ipipe->formats[IPIPE_PAD_SOURCE_VP];

	/* Do nothing? */

	omap4iss_isp_enable_interrupts(iss);

}

/* -----------------------------------------------------------------------------

 * V4L2 subdev operations

 */

/*

 * ipipe_set_stream - Enable/Disable streaming on the IPIPE module

 * @sd: ISP IPIPE V4L2 subdevice

 * @enable: Enable/disable stream

 */

static int ipipe_set_stream(struct v4l2_subdev *sd, int enable)

{

	struct iss_ipipe_device *ipipe = v4l2_get_subdevdata(sd);

	struct iss_device *iss = to_iss_device(ipipe);

	int ret = 0;

	if (ipipe->state == ISS_PIPELINE_STREAM_STOPPED) {

		if (enable == ISS_PIPELINE_STREAM_STOPPED)

			return 0;

		omap4iss_isp_subclk_enable(iss, OMAP4_ISS_ISP_SUBCLK_IPIPE);

		/* Enable clk_arm_g0 */

		writel(IPIPE_GCK_MMR_REG,

			iss->regs[OMAP4_ISS_MEM_ISP_IPIPE] + IPIPE_GCK_MMR);

		/* Enable clk_pix_g[3:0] */

		writel(IPIPE_GCK_PIX_G3 |

			IPIPE_GCK_PIX_G2 |

			IPIPE_GCK_PIX_G1 |

			IPIPE_GCK_PIX_G0,

			iss->regs[OMAP4_ISS_MEM_ISP_IPIPE] + IPIPE_GCK_PIX);

	}

	switch (enable) {

	case ISS_PIPELINE_STREAM_CONTINUOUS:

		ipipe_configure(ipipe);

		ipipe_print_status(ipipe);

		atomic_set(&ipipe->stopping, 0);

		ipipe_enable(ipipe, 1);

		break;

	case ISS_PIPELINE_STREAM_STOPPED:

		if (ipipe->state == ISS_PIPELINE_STREAM_STOPPED)

			return 0;

		if (omap4iss_module_sync_idle(&sd->entity, &ipipe->wait,

					      &ipipe->stopping))

			dev_dbg(iss->dev, "%s: module stop timeout.\n",

				sd->name);

		ipipe_enable(ipipe, 0);

		omap4iss_isp_disable_interrupts(iss);

		omap4iss_isp_subclk_disable(iss, OMAP4_ISS_ISP_SUBCLK_IPIPE);

		break;

	}

	ipipe->state = enable;

	return ret;

}

static struct v4l2_mbus_framefmt *

__ipipe_get_format(struct iss_ipipe_device *ipipe, struct v4l2_subdev_fh *fh,

		  unsigned int pad, enum v4l2_subdev_format_whence which)

{

	if (which == V4L2_SUBDEV_FORMAT_TRY)

		return v4l2_subdev_get_try_format(fh, pad);

	else

		return &ipipe->formats[pad];

}

/*

 * ipipe_try_format - Try video format on a pad

 * @ipipe: ISS IPIPE device

 * @fh : V4L2 subdev file handle

 * @pad: Pad number

 * @fmt: Format

 */

static void

ipipe_try_format(struct iss_ipipe_device *ipipe, struct v4l2_subdev_fh *fh,

		unsigned int pad, struct v4l2_mbus_framefmt *fmt,

		enum v4l2_subdev_format_whence which)

{

	struct v4l2_mbus_framefmt *format;

	unsigned int width = fmt->width;

	unsigned int height = fmt->height;

	unsigned int i;

	switch (pad) {

	case IPIPE_PAD_SINK:

		for (i = 0; i < ARRAY_SIZE(ipipe_fmts); i++) {

			if (fmt->code == ipipe_fmts[i])

				break;

		}

		/* If not found, use SGRBG10 as default */

		if (i >= ARRAY_SIZE(ipipe_fmts))

			fmt->code = V4L2_MBUS_FMT_SGRBG10_1X10;

		/* Clamp the input size. */

		fmt->width = clamp_t(u32, width, 1, 8192);

		fmt->height = clamp_t(u32, height, 1, 8192);

		fmt->colorspace = V4L2_COLORSPACE_SRGB;

		break;

	case IPIPE_PAD_SOURCE_VP:

		format = __ipipe_get_format(ipipe, fh, IPIPE_PAD_SINK, which);

		memcpy(fmt, format, sizeof(*fmt));

		fmt->code = V4L2_MBUS_FMT_UYVY8_1X16;

		fmt->width = clamp_t(u32, width, 32, fmt->width);

		fmt->height = clamp_t(u32, height, 32, fmt->height);

		fmt->colorspace = V4L2_COLORSPACE_JPEG;

		break;

	}

	fmt->field = V4L2_FIELD_NONE;

}

/*

 * ipipe_enum_mbus_code - Handle pixel format enumeration

 * @sd     : pointer to v4l2 subdev structure

 * @fh : V4L2 subdev file handle

 * @code   : pointer to v4l2_subdev_mbus_code_enum structure

 * return -EINVAL or zero on success

 */

static int ipipe_enum_mbus_code(struct v4l2_subdev *sd,

			       struct v4l2_subdev_fh *fh,

			       struct v4l2_subdev_mbus_code_enum *code)

{

	switch (code->pad) {

	case IPIPE_PAD_SINK:

		if (code->index >= ARRAY_SIZE(ipipe_fmts))

			return -EINVAL;

		code->code = ipipe_fmts[code->index];

		break;

	case IPIPE_PAD_SOURCE_VP:

		/* FIXME: Forced format conversion inside IPIPE ? */

		if (code->index != 0)

			return -EINVAL;

		code->code = V4L2_MBUS_FMT_UYVY8_1X16;

		break;

	default:

		return -EINVAL;

	}

	return 0;

}

static int ipipe_enum_frame_size(struct v4l2_subdev *sd,

				struct v4l2_subdev_fh *fh,

				struct v4l2_subdev_frame_size_enum *fse)

{

	struct iss_ipipe_device *ipipe = v4l2_get_subdevdata(sd);

	struct v4l2_mbus_framefmt format;

	if (fse->index != 0)

		return -EINVAL;

	format.code = fse->code;

	format.width = 1;

	format.height = 1;

	ipipe_try_format(ipipe, fh, fse->pad, &format, V4L2_SUBDEV_FORMAT_TRY);

	fse->min_width = format.width;

	fse->min_height = format.height;

	if (format.code != fse->code)

		return -EINVAL;

	format.code = fse->code;

	format.width = -1;

	format.height = -1;

	ipipe_try_format(ipipe, fh, fse->pad, &format, V4L2_SUBDEV_FORMAT_TRY);

	fse->max_width = format.width;

	fse->max_height = format.height;

	return 0;

}

/*

 * ipipe_get_format - Retrieve the video format on a pad

 * @sd : ISP IPIPE V4L2 subdevice

 * @fh : V4L2 subdev file handle

 * @fmt: Format

 *

 * Return 0 on success or -EINVAL if the pad is invalid or doesn't correspond

 * to the format type.

 */

static int ipipe_get_format(struct v4l2_subdev *sd, struct v4l2_subdev_fh *fh,

			   struct v4l2_subdev_format *fmt)

{

	struct iss_ipipe_device *ipipe = v4l2_get_subdevdata(sd);

	struct v4l2_mbus_framefmt *format;

	format = __ipipe_get_format(ipipe, fh, fmt->pad, fmt->which);

	if (format == NULL)

		return -EINVAL;

	fmt->format = *format;

	return 0;

}

/*

 * ipipe_set_format - Set the video format on a pad

 * @sd : ISP IPIPE V4L2 subdevice

 * @fh : V4L2 subdev file handle

 * @fmt: Format

 *

 * Return 0 on success or -EINVAL if the pad is invalid or doesn't correspond

 * to the format type.

 */

static int ipipe_set_format(struct v4l2_subdev *sd, struct v4l2_subdev_fh *fh,

			   struct v4l2_subdev_format *fmt)

{

	struct iss_ipipe_device *ipipe = v4l2_get_subdevdata(sd);

	struct v4l2_mbus_framefmt *format;

	format = __ipipe_get_format(ipipe, fh, fmt->pad, fmt->which);

	if (format == NULL)

		return -EINVAL;

	ipipe_try_format(ipipe, fh, fmt->pad, &fmt->format, fmt->which);

	*format = fmt->format;

	/* Propagate the format from sink to source */

	if (fmt->pad == IPIPE_PAD_SINK) {

		format = __ipipe_get_format(ipipe, fh, IPIPE_PAD_SOURCE_VP,

					   fmt->which);

		*format = fmt->format;

		ipipe_try_format(ipipe, fh, IPIPE_PAD_SOURCE_VP, format,

				fmt->which);

	}

	return 0;

}

static int ipipe_link_validate(struct v4l2_subdev *sd, struct media_link *link,

				 struct v4l2_subdev_format *source_fmt,

				 struct v4l2_subdev_format *sink_fmt)

{

	/* Check if the two ends match */

	if (source_fmt->format.width != sink_fmt->format.width ||

	    source_fmt->format.height != sink_fmt->format.height)

		return -EPIPE;

	if (source_fmt->format.code != sink_fmt->format.code)

		return -EPIPE;

	return 0;

}

/*

 * ipipe_init_formats - Initialize formats on all pads

 * @sd: ISP IPIPE V4L2 subdevice

 * @fh: V4L2 subdev file handle

 *

 * Initialize all pad formats with default values. If fh is not NULL, try

 * formats are initialized on the file handle. Otherwise active formats are

 * initialized on the device.

 */

static int ipipe_init_formats(struct v4l2_subdev *sd, struct v4l2_subdev_fh *fh)

{

	struct v4l2_subdev_format format;

	memset(&format, 0, sizeof(format));

	format.pad = IPIPE_PAD_SINK;

	format.which = fh ? V4L2_SUBDEV_FORMAT_TRY : V4L2_SUBDEV_FORMAT_ACTIVE;

	format.format.code = V4L2_MBUS_FMT_SGRBG10_1X10;

	format.format.width = 4096;

	format.format.height = 4096;

	ipipe_set_format(sd, fh, &format);

	return 0;

}

/* V4L2 subdev video operations */

static const struct v4l2_subdev_video_ops ipipe_v4l2_video_ops = {

	.s_stream = ipipe_set_stream,

};

/* V4L2 subdev pad operations */

static const struct v4l2_subdev_pad_ops ipipe_v4l2_pad_ops = {

	.enum_mbus_code = ipipe_enum_mbus_code,

	.enum_frame_size = ipipe_enum_frame_size,

	.get_fmt = ipipe_get_format,

	.set_fmt = ipipe_set_format,

	.link_validate = ipipe_link_validate,

};

/* V4L2 subdev operations */

static const struct v4l2_subdev_ops ipipe_v4l2_ops = {

	.video = &ipipe_v4l2_video_ops,

	.pad = &ipipe_v4l2_pad_ops,

};

/* V4L2 subdev internal operations */

static const struct v4l2_subdev_internal_ops ipipe_v4l2_internal_ops = {

	.open = ipipe_init_formats,

};

/* -----------------------------------------------------------------------------

 * Media entity operations

 */

/*

 * ipipe_link_setup - Setup IPIPE connections

 * @entity: IPIPE media entity

 * @local: Pad at the local end of the link

 * @remote: Pad at the remote end of the link

 * @flags: Link flags

 *

 * return -EINVAL or zero on success

 */

static int ipipe_link_setup(struct media_entity *entity,

			   const struct media_pad *local,

			   const struct media_pad *remote, u32 flags)

{

	struct v4l2_subdev *sd = media_entity_to_v4l2_subdev(entity);

	struct iss_ipipe_device *ipipe = v4l2_get_subdevdata(sd);

	struct iss_device *iss = to_iss_device(ipipe);

	switch (local->index | media_entity_type(remote->entity)) {

	case IPIPE_PAD_SINK | MEDIA_ENT_T_V4L2_SUBDEV:

		/* Read from IPIPEIF. */

		if (!(flags & MEDIA_LNK_FL_ENABLED)) {

			ipipe->input = IPIPE_INPUT_NONE;

			break;

		}

		if (ipipe->input != IPIPE_INPUT_NONE)

			return -EBUSY;

		if (remote->entity == &iss->ipipeif.subdev.entity)

			ipipe->input = IPIPE_INPUT_IPIPEIF;

		break;

	case IPIPE_PAD_SOURCE_VP | MEDIA_ENT_T_V4L2_SUBDEV:

		/* Send to RESIZER */

		if (flags & MEDIA_LNK_FL_ENABLED) {

			if (ipipe->output & ~IPIPE_OUTPUT_VP)

				return -EBUSY;

			ipipe->output |= IPIPE_OUTPUT_VP;

		} else {

			ipipe->output &= ~IPIPE_OUTPUT_VP;

		}

		break;

	default:

		return -EINVAL;

	}

	return 0;

}

/* media operations */

static const struct media_entity_operations ipipe_media_ops = {

	.link_setup = ipipe_link_setup,

	.link_validate = v4l2_subdev_link_validate,

};

/*

 * ipipe_init_entities - Initialize V4L2 subdev and media entity

 * @ipipe: ISS ISP IPIPE module

 *

 * Return 0 on success and a negative error code on failure.

 */

static int ipipe_init_entities(struct iss_ipipe_device *ipipe)

{

	struct v4l2_subdev *sd = &ipipe->subdev;

	struct media_pad *pads = ipipe->pads;

	struct media_entity *me = &sd->entity;

	int ret;

	ipipe->input = IPIPE_INPUT_NONE;

	v4l2_subdev_init(sd, &ipipe_v4l2_ops);

	sd->internal_ops = &ipipe_v4l2_internal_ops;

	strlcpy(sd->name, "OMAP4 ISS ISP IPIPE", sizeof(sd->name));

	sd->grp_id = 1 << 16;	/* group ID for iss subdevs */

	v4l2_set_subdevdata(sd, ipipe);

	sd->flags |= V4L2_SUBDEV_FL_HAS_DEVNODE;

	pads[IPIPE_PAD_SINK].flags = MEDIA_PAD_FL_SINK;

	pads[IPIPE_PAD_SOURCE_VP].flags = MEDIA_PAD_FL_SOURCE;

	me->ops = &ipipe_media_ops;

	ret = media_entity_init(me, IPIPE_PADS_NUM, pads, 0);

	if (ret < 0)

		return ret;

	ipipe_init_formats(sd, NULL);

	return 0;

}

void omap4iss_ipipe_unregister_entities(struct iss_ipipe_device *ipipe)

{

	media_entity_cleanup(&ipipe->subdev.entity);

	v4l2_device_unregister_subdev(&ipipe->subdev);

}

int omap4iss_ipipe_register_entities(struct iss_ipipe_device *ipipe,

	struct v4l2_device *vdev)

{

	int ret;

	/* Register the subdev and video node. */

	ret = v4l2_device_register_subdev(vdev, &ipipe->subdev);

	if (ret < 0)

		goto error;

	return 0;

error:

	omap4iss_ipipe_unregister_entities(ipipe);

	return ret;

}

/* -----------------------------------------------------------------------------

 * ISP IPIPE initialisation and cleanup

 */

/*

 * omap4iss_ipipe_init - IPIPE module initialization.

 * @iss: Device pointer specific to the OMAP4 ISS.

 *

 * TODO: Get the initialisation values from platform data.

 *

 * Return 0 on success or a negative error code otherwise.

 */

int omap4iss_ipipe_init(struct iss_device *iss)

{

	struct iss_ipipe_device *ipipe = &iss->ipipe;

	ipipe->state = ISS_PIPELINE_STREAM_STOPPED;

	init_waitqueue_head(&ipipe->wait);

	return ipipe_init_entities(ipipe);

}

/*

 * omap4iss_ipipe_cleanup - IPIPE module cleanup.

 * @iss: Device pointer specific to the OMAP4 ISS.

 */

void omap4iss_ipipe_cleanup(struct iss_device *iss)

{

	/* FIXME: are you sure there's nothing to do? */

}

/*

 * TI OMAP4 ISS V4L2 Driver - ISP IPIPE module

 *

 * Copyright (C) 2012 Texas Instruments, Inc.

 *

 * Author: Sergio Aguirre <sergio.a.aguirre@gmail.com>

 *

 * This program is free software; you can redistribute it and/or modify

 * it under the terms of the GNU General Public License as published by

 * the Free Software Foundation; either version 2 of the License, or

 * (at your option) any later version.

 */

#ifndef OMAP4_ISS_IPIPE_H

#define OMAP4_ISS_IPIPE_H

#include "iss_video.h"

enum ipipe_input_entity {

	IPIPE_INPUT_NONE,

	IPIPE_INPUT_IPIPEIF,

};

#define IPIPE_OUTPUT_VP		(1 << 0)

/* Sink and source IPIPE pads */

#define IPIPE_PAD_SINK				0

#define IPIPE_PAD_SOURCE_VP			1

#define IPIPE_PADS_NUM				2

/*

 * struct iss_ipipe_device - Structure for the IPIPE module to store its own

 *			    information

 * @subdev: V4L2 subdevice

 * @pads: Sink and source media entity pads

 * @formats: Active video formats

 * @input: Active input

 * @output: Active outputs

 * @error: A hardware error occurred during capture

 * @state: Streaming state

 * @wait: Wait queue used to stop the module

 * @stopping: Stopping state

 */

struct iss_ipipe_device {

	struct v4l2_subdev subdev;

	struct media_pad pads[IPIPE_PADS_NUM];

	struct v4l2_mbus_framefmt formats[IPIPE_PADS_NUM];

	enum ipipe_input_entity input;

	unsigned int output;

	unsigned int error;

	enum iss_pipeline_stream_state state;

	wait_queue_head_t wait;

	atomic_t stopping;

};

struct iss_device;

int omap4iss_ipipe_register_entities(struct iss_ipipe_device *ipipe,

	struct v4l2_device *vdev);

void omap4iss_ipipe_unregister_entities(struct iss_ipipe_device *ipipe);

int omap4iss_ipipe_init(struct iss_device *iss);

void omap4iss_ipipe_cleanup(struct iss_device *iss);

#endif	/* OMAP4_ISS_IPIPE_H */

/*

 * TI OMAP4 ISS V4L2 Driver - ISP IPIPEIF module

 *

 * Copyright (C) 2012 Texas Instruments, Inc.

 *

 * Author: Sergio Aguirre <sergio.a.aguirre@gmail.com>

 *

 * This program is free software; you can redistribute it and/or modify

 * it under the terms of the GNU General Public License as published by

 * the Free Software Foundation; either version 2 of the License, or

 * (at your option) any later version.

 */

#ifndef OMAP4_ISS_IPIPEIF_H

#define OMAP4_ISS_IPIPEIF_H

#include "iss_video.h"

enum ipipeif_input_entity {

	IPIPEIF_INPUT_NONE,

	IPIPEIF_INPUT_CSI2A,

	IPIPEIF_INPUT_CSI2B

};

#define IPIPEIF_OUTPUT_MEMORY		(1 << 0)

#define IPIPEIF_OUTPUT_VP		(1 << 1)

/* Sink and source IPIPEIF pads */

#define IPIPEIF_PAD_SINK			0

#define IPIPEIF_PAD_SOURCE_ISIF_SF		1

#define IPIPEIF_PAD_SOURCE_VP			2

#define IPIPEIF_PADS_NUM			3

/*

 * struct iss_ipipeif_device - Structure for the IPIPEIF module to store its own

 *			    information

 * @subdev: V4L2 subdevice

 * @pads: Sink and source media entity pads

 * @formats: Active video formats

 * @input: Active input

 * @output: Active outputs

 * @video_out: Output video node

 * @error: A hardware error occurred during capture

 * @alaw: A-law compression enabled (1) or disabled (0)

 * @lpf: Low pass filter enabled (1) or disabled (0)

 * @obclamp: Optical-black clamp enabled (1) or disabled (0)

 * @fpc_en: Faulty pixels correction enabled (1) or disabled (0)

 * @blcomp: Black level compensation configuration

 * @clamp: Optical-black or digital clamp configuration

 * @fpc: Faulty pixels correction configuration

 * @lsc: Lens shading compensation configuration

 * @update: Bitmask of controls to update during the next interrupt

 * @shadow_update: Controls update in progress by userspace

 * @syncif: Interface synchronization configuration

 * @vpcfg: Video port configuration

 * @underrun: A buffer underrun occurred and a new buffer has been queued

 * @state: Streaming state

 * @lock: Serializes shadow_update with interrupt handler

 * @wait: Wait queue used to stop the module

 * @stopping: Stopping state

 * @ioctl_lock: Serializes ioctl calls and LSC requests freeing

 */

struct iss_ipipeif_device {

	struct v4l2_subdev subdev;

	struct media_pad pads[IPIPEIF_PADS_NUM];

	struct v4l2_mbus_framefmt formats[IPIPEIF_PADS_NUM];

	enum ipipeif_input_entity input;

	unsigned int output;

	struct iss_video video_out;

	unsigned int error;

	enum iss_pipeline_stream_state state;

	wait_queue_head_t wait;

	atomic_t stopping;

};

struct iss_device;

int omap4iss_ipipeif_init(struct iss_device *iss);

void omap4iss_ipipeif_cleanup(struct iss_device *iss);

int omap4iss_ipipeif_register_entities(struct iss_ipipeif_device *ipipeif,

	struct v4l2_device *vdev);

void omap4iss_ipipeif_unregister_entities(struct iss_ipipeif_device *ipipeif);

int omap4iss_ipipeif_busy(struct iss_ipipeif_device *ipipeif);

void omap4iss_ipipeif_isr(struct iss_ipipeif_device *ipipeif, u32 events);

void omap4iss_ipipeif_restore_context(struct iss_device *iss);

void omap4iss_ipipeif_max_rate(struct iss_ipipeif_device *ipipeif,

	unsigned int *max_rate);

#endif	/* OMAP4_ISS_IPIPEIF_H */