drivers/media/platform/omap3isp/isp.h - maze/linux - Git at Google

 /*
  * isp.h
  *
  * TI OMAP3 ISP - Core
  *
  * Copyright (C) 2009-2010 Nokia Corporation
  * Copyright (C) 2009 Texas Instruments, Inc.
  *
  * Contacts: Laurent Pinchart <laurent.pinchart@ideasonboard.com>
  *	     Sakari Ailus <sakari.ailus@iki.fi>
  *
  * This program is free software; you can redistribute it and/or modify
  * it under the terms of the GNU General Public License version 2 as
  * published by the Free Software Foundation.
  *
  * This program is distributed in the hope that it will be useful, but
  * WITHOUT ANY WARRANTY; without even the implied warranty of
  * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the GNU
  * General Public License for more details.
  *
  * You should have received a copy of the GNU General Public License
  * along with this program; if not, write to the Free Software
  * Foundation, Inc., 51 Franklin St, Fifth Floor, Boston, MA
  * 02110-1301 USA
  */

 #ifndef OMAP3_ISP_CORE_H
 #define OMAP3_ISP_CORE_H

 #include <media/omap3isp.h>
 #include <media/v4l2-device.h>
 #include <linux/device.h>
 #include <linux/io.h>
 #include <linux/iommu.h>
 #include <linux/platform_device.h>
 #include <linux/wait.h>

 #include "ispstat.h"
 #include "ispccdc.h"
 #include "ispreg.h"
 #include "ispresizer.h"
 #include "isppreview.h"
 #include "ispcsiphy.h"
 #include "ispcsi2.h"
 #include "ispccp2.h"

 #define IOMMU_FLAG (IOVMF_ENDIAN_LITTLE | IOVMF_ELSZ_8)

 #define ISP_TOK_TERM		0xFFFFFFFF	/*
 						 * terminating token for ISP
 						 * modules reg list
 						 */
 #define to_isp_device(ptr_module)				\
 	container_of(ptr_module, struct isp_device, isp_##ptr_module)
 #define to_device(ptr_module)						\
 	(to_isp_device(ptr_module)->dev)

 enum isp_mem_resources {
 	OMAP3_ISP_IOMEM_MAIN,
 	OMAP3_ISP_IOMEM_CCP2,
 	OMAP3_ISP_IOMEM_CCDC,
 	OMAP3_ISP_IOMEM_HIST,
 	OMAP3_ISP_IOMEM_H3A,
 	OMAP3_ISP_IOMEM_PREV,
 	OMAP3_ISP_IOMEM_RESZ,
 	OMAP3_ISP_IOMEM_SBL,
 	OMAP3_ISP_IOMEM_CSI2A_REGS1,
 	OMAP3_ISP_IOMEM_CSIPHY2,
 	OMAP3_ISP_IOMEM_CSI2A_REGS2,
 	OMAP3_ISP_IOMEM_CSI2C_REGS1,
 	OMAP3_ISP_IOMEM_CSIPHY1,
 	OMAP3_ISP_IOMEM_CSI2C_REGS2,
 	OMAP3_ISP_IOMEM_343X_CONTROL_CSIRXFE,
 	OMAP3_ISP_IOMEM_3630_CONTROL_CAMERA_PHY_CTRL,
 	OMAP3_ISP_IOMEM_LAST
 };

 enum isp_sbl_resource {
 	OMAP3_ISP_SBL_CSI1_READ		= 0x1,
 	OMAP3_ISP_SBL_CSI1_WRITE	= 0x2,
 	OMAP3_ISP_SBL_CSI2A_WRITE	= 0x4,
 	OMAP3_ISP_SBL_CSI2C_WRITE	= 0x8,
 	OMAP3_ISP_SBL_CCDC_LSC_READ	= 0x10,
 	OMAP3_ISP_SBL_CCDC_WRITE	= 0x20,
 	OMAP3_ISP_SBL_PREVIEW_READ	= 0x40,
 	OMAP3_ISP_SBL_PREVIEW_WRITE	= 0x80,
 	OMAP3_ISP_SBL_RESIZER_READ	= 0x100,
 	OMAP3_ISP_SBL_RESIZER_WRITE	= 0x200,
 };

 enum isp_subclk_resource {
 	OMAP3_ISP_SUBCLK_CCDC		= (1 << 0),
 	OMAP3_ISP_SUBCLK_AEWB		= (1 << 1),
 	OMAP3_ISP_SUBCLK_AF		= (1 << 2),
 	OMAP3_ISP_SUBCLK_HIST		= (1 << 3),
 	OMAP3_ISP_SUBCLK_PREVIEW	= (1 << 4),
 	OMAP3_ISP_SUBCLK_RESIZER	= (1 << 5),
 };

 /* ISP: OMAP 34xx ES 1.0 */
 #define ISP_REVISION_1_0		0x10
 /* ISP2: OMAP 34xx ES 2.0, 2.1 and 3.0 */
 #define ISP_REVISION_2_0		0x20
 /* ISP2P: OMAP 36xx */
 #define ISP_REVISION_15_0		0xF0

 /*
  * struct isp_res_mapping - Map ISP io resources to ISP revision.
  * @isp_rev: ISP_REVISION_x_x
  * @map: bitmap for enum isp_mem_resources
  */
 struct isp_res_mapping {
 	u32 isp_rev;
 	u32 map;
 };

 /*
  * struct isp_reg - Structure for ISP register values.
  * @reg: 32-bit Register address.
  * @val: 32-bit Register value.
  */
 struct isp_reg {
 	enum isp_mem_resources mmio_range;
 	u32 reg;
 	u32 val;
 };

 struct isp_platform_callback {
 	u32 (*set_xclk)(struct isp_device *isp, u32 xclk, u8 xclksel);
 };

 /*
  * struct isp_device - ISP device structure.
  * @dev: Device pointer specific to the OMAP3 ISP.
  * @revision: Stores current ISP module revision.
  * @irq_num: Currently used IRQ number.
  * @mmio_base: Array with kernel base addresses for ioremapped ISP register
  *             regions.
  * @mmio_base_phys: Array with physical L4 bus addresses for ISP register
  *                  regions.
  * @mmio_size: Array with ISP register regions size in bytes.
  * @raw_dmamask: Raw DMA mask
  * @stat_lock: Spinlock for handling statistics
  * @isp_mutex: Mutex for serializing requests to ISP.
  * @crashed: Bitmask of crashed entities (indexed by entity ID)
  * @has_context: Context has been saved at least once and can be restored.
  * @ref_count: Reference count for handling multiple ISP requests.
  * @cam_ick: Pointer to camera interface clock structure.
  * @cam_mclk: Pointer to camera functional clock structure.
  * @csi2_fck: Pointer to camera CSI2 complexIO clock structure.
  * @l3_ick: Pointer to OMAP3 L3 bus interface clock.
  * @irq: Currently attached ISP ISR callbacks information structure.
  * @isp_af: Pointer to current settings for ISP AutoFocus SCM.
  * @isp_hist: Pointer to current settings for ISP Histogram SCM.
  * @isp_h3a: Pointer to current settings for ISP Auto Exposure and
  *           White Balance SCM.
  * @isp_res: Pointer to current settings for ISP Resizer.
  * @isp_prev: Pointer to current settings for ISP Preview.
  * @isp_ccdc: Pointer to current settings for ISP CCDC.
  * @iommu: Pointer to requested IOMMU instance for ISP.
  * @platform_cb: ISP driver callback function pointers for platform code
  *
  * This structure is used to store the OMAP ISP Information.
  */
 struct isp_device {
 	struct v4l2_device v4l2_dev;
 	struct media_device media_dev;
 	struct device *dev;
 	u32 revision;

 	/* platform HW resources */
 	struct isp_platform_data *pdata;
 	unsigned int irq_num;

 	void __iomem *mmio_base[OMAP3_ISP_IOMEM_LAST];
 	unsigned long mmio_base_phys[OMAP3_ISP_IOMEM_LAST];
 	resource_size_t mmio_size[OMAP3_ISP_IOMEM_LAST];

 	u64 raw_dmamask;

 	/* ISP Obj */
 	spinlock_t stat_lock;	/* common lock for statistic drivers */
 	struct mutex isp_mutex;	/* For handling ref_count field */
 	u32 crashed;
 	int has_context;
 	int ref_count;
 	unsigned int autoidle;
 	u32 xclk_divisor[2];	/* Two clocks, a and b. */
 #define ISP_CLK_CAM_ICK		0
 #define ISP_CLK_CAM_MCLK	1
 #define ISP_CLK_CSI2_FCK	2
 #define ISP_CLK_L3_ICK		3
 	struct clk *clock[4];

 	/* ISP modules */
 	struct ispstat isp_af;
 	struct ispstat isp_aewb;
 	struct ispstat isp_hist;
 	struct isp_res_device isp_res;
 	struct isp_prev_device isp_prev;
 	struct isp_ccdc_device isp_ccdc;
 	struct isp_csi2_device isp_csi2a;
 	struct isp_csi2_device isp_csi2c;
 	struct isp_ccp2_device isp_ccp2;
 	struct isp_csiphy isp_csiphy1;
 	struct isp_csiphy isp_csiphy2;

 	unsigned int sbl_resources;
 	unsigned int subclk_resources;

 	struct iommu_domain *domain;

 	struct isp_platform_callback platform_cb;
 };

 #define v4l2_dev_to_isp_device(dev) \
 	container_of(dev, struct isp_device, v4l2_dev)

 void omap3isp_hist_dma_done(struct isp_device *isp);

 void omap3isp_flush(struct isp_device *isp);

 int omap3isp_module_sync_idle(struct media_entity *me, wait_queue_head_t *wait,
 			      atomic_t *stopping);

 int omap3isp_module_sync_is_stopping(wait_queue_head_t *wait,
 				     atomic_t *stopping);

 int omap3isp_pipeline_set_stream(struct isp_pipeline *pipe,
 				 enum isp_pipeline_stream_state state);
 void omap3isp_configure_bridge(struct isp_device *isp,
 			       enum ccdc_input_entity input,
 			       const struct isp_parallel_platform_data *pdata,
 			       unsigned int shift, unsigned int bridge);

 struct isp_device *omap3isp_get(struct isp_device *isp);
 void omap3isp_put(struct isp_device *isp);

 void omap3isp_print_status(struct isp_device *isp);

 void omap3isp_sbl_enable(struct isp_device *isp, enum isp_sbl_resource res);
 void omap3isp_sbl_disable(struct isp_device *isp, enum isp_sbl_resource res);

 void omap3isp_subclk_enable(struct isp_device *isp,
 			    enum isp_subclk_resource res);
 void omap3isp_subclk_disable(struct isp_device *isp,
 			     enum isp_subclk_resource res);

 int omap3isp_pipeline_pm_use(struct media_entity *entity, int use);

 int omap3isp_register_entities(struct platform_device *pdev,
 			       struct v4l2_device *v4l2_dev);
 void omap3isp_unregister_entities(struct platform_device *pdev);

 /*
  * isp_reg_readl - Read value of an OMAP3 ISP register
  * @dev: Device pointer specific to the OMAP3 ISP.
  * @isp_mmio_range: Range to which the register offset refers to.
  * @reg_offset: Register offset to read from.
  *
  * Returns an unsigned 32 bit value with the required register contents.
  */
 static inline
 u32 isp_reg_readl(struct isp_device *isp, enum isp_mem_resources isp_mmio_range,
 		  u32 reg_offset)
 {
 	return __raw_readl(isp->mmio_base[isp_mmio_range] + reg_offset);
 }

 /*
  * isp_reg_writel - Write value to an OMAP3 ISP register
  * @dev: Device pointer specific to the OMAP3 ISP.
  * @reg_value: 32 bit value to write to the register.
  * @isp_mmio_range: Range to which the register offset refers to.
  * @reg_offset: Register offset to write into.
  */
 static inline
 void isp_reg_writel(struct isp_device *isp, u32 reg_value,
 		    enum isp_mem_resources isp_mmio_range, u32 reg_offset)
 {
 	__raw_writel(reg_value, isp->mmio_base[isp_mmio_range] + reg_offset);
 }

 /*
  * isp_reg_and - Clear individual bits in an OMAP3 ISP register
  * @dev: Device pointer specific to the OMAP3 ISP.
  * @mmio_range: Range to which the register offset refers to.
  * @reg: Register offset to work on.
  * @clr_bits: 32 bit value which would be cleared in the register.
  */
 static inline
 void isp_reg_clr(struct isp_device *isp, enum isp_mem_resources mmio_range,
 		 u32 reg, u32 clr_bits)
 {
 	u32 v = isp_reg_readl(isp, mmio_range, reg);

 	isp_reg_writel(isp, v & ~clr_bits, mmio_range, reg);
 }

 /*
  * isp_reg_set - Set individual bits in an OMAP3 ISP register
  * @dev: Device pointer specific to the OMAP3 ISP.
  * @mmio_range: Range to which the register offset refers to.
  * @reg: Register offset to work on.
  * @set_bits: 32 bit value which would be set in the register.
  */
 static inline
 void isp_reg_set(struct isp_device *isp, enum isp_mem_resources mmio_range,
 		 u32 reg, u32 set_bits)
 {
 	u32 v = isp_reg_readl(isp, mmio_range, reg);

 	isp_reg_writel(isp, v | set_bits, mmio_range, reg);
 }

 /*
  * isp_reg_clr_set - Clear and set invidial bits in an OMAP3 ISP register
  * @dev: Device pointer specific to the OMAP3 ISP.
  * @mmio_range: Range to which the register offset refers to.
  * @reg: Register offset to work on.
  * @clr_bits: 32 bit value which would be cleared in the register.
  * @set_bits: 32 bit value which would be set in the register.
  *
  * The clear operation is done first, and then the set operation.
  */
 static inline
 void isp_reg_clr_set(struct isp_device *isp, enum isp_mem_resources mmio_range,
 		     u32 reg, u32 clr_bits, u32 set_bits)
 {
 	u32 v = isp_reg_readl(isp, mmio_range, reg);

 	isp_reg_writel(isp, (v & ~clr_bits) | set_bits, mmio_range, reg);
 }

 static inline enum v4l2_buf_type
 isp_pad_buffer_type(const struct v4l2_subdev *subdev, int pad)
 {
 	if (pad >= subdev->entity.num_pads)
 		return 0;

 	if (subdev->entity.pads[pad].flags & MEDIA_PAD_FL_SINK)
 		return V4L2_BUF_TYPE_VIDEO_OUTPUT;
 	else
 		return V4L2_BUF_TYPE_VIDEO_CAPTURE;
 }

 #endif	/* OMAP3_ISP_CORE_H */
	/*
	* isp.h
	*
	* TI OMAP3 ISP - Core
	*
	* Copyright (C) 2009-2010 Nokia Corporation
	* Copyright (C) 2009 Texas Instruments, Inc.
	*
	* Contacts: Laurent Pinchart <laurent.pinchart@ideasonboard.com>
	* Sakari Ailus <sakari.ailus@iki.fi>
	*
	* This program is free software; you can redistribute it and/or modify
	* it under the terms of the GNU General Public License version 2 as
	* published by the Free Software Foundation.
	*
	* This program is distributed in the hope that it will be useful, but
	* WITHOUT ANY WARRANTY; without even the implied warranty of
	* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
	* General Public License for more details.
	*
	* You should have received a copy of the GNU General Public License
	* along with this program; if not, write to the Free Software
	* Foundation, Inc., 51 Franklin St, Fifth Floor, Boston, MA
	* 02110-1301 USA
	*/

	#ifndef OMAP3_ISP_CORE_H
	#define OMAP3_ISP_CORE_H

	#include <media/omap3isp.h>
	#include <media/v4l2-device.h>
	#include <linux/device.h>
	#include <linux/io.h>
	#include <linux/iommu.h>
	#include <linux/platform_device.h>
	#include <linux/wait.h>

	#include "ispstat.h"
	#include "ispccdc.h"
	#include "ispreg.h"
	#include "ispresizer.h"
	#include "isppreview.h"
	#include "ispcsiphy.h"
	#include "ispcsi2.h"
	#include "ispccp2.h"

	#define IOMMU_FLAG (IOVMF_ENDIAN_LITTLE \| IOVMF_ELSZ_8)

	#define ISP_TOK_TERM 0xFFFFFFFF /*
	* terminating token for ISP
	* modules reg list
	*/
	#define to_isp_device(ptr_module) \
	container_of(ptr_module, struct isp_device, isp_##ptr_module)
	#define to_device(ptr_module) \
	(to_isp_device(ptr_module)->dev)

	enum isp_mem_resources {
	OMAP3_ISP_IOMEM_MAIN,
	OMAP3_ISP_IOMEM_CCP2,
	OMAP3_ISP_IOMEM_CCDC,
	OMAP3_ISP_IOMEM_HIST,
	OMAP3_ISP_IOMEM_H3A,
	OMAP3_ISP_IOMEM_PREV,
	OMAP3_ISP_IOMEM_RESZ,
	OMAP3_ISP_IOMEM_SBL,
	OMAP3_ISP_IOMEM_CSI2A_REGS1,
	OMAP3_ISP_IOMEM_CSIPHY2,
	OMAP3_ISP_IOMEM_CSI2A_REGS2,
	OMAP3_ISP_IOMEM_CSI2C_REGS1,
	OMAP3_ISP_IOMEM_CSIPHY1,
	OMAP3_ISP_IOMEM_CSI2C_REGS2,
	OMAP3_ISP_IOMEM_343X_CONTROL_CSIRXFE,
	OMAP3_ISP_IOMEM_3630_CONTROL_CAMERA_PHY_CTRL,
	OMAP3_ISP_IOMEM_LAST
	};

	enum isp_sbl_resource {
	OMAP3_ISP_SBL_CSI1_READ = 0x1,
	OMAP3_ISP_SBL_CSI1_WRITE = 0x2,
	OMAP3_ISP_SBL_CSI2A_WRITE = 0x4,
	OMAP3_ISP_SBL_CSI2C_WRITE = 0x8,
	OMAP3_ISP_SBL_CCDC_LSC_READ = 0x10,
	OMAP3_ISP_SBL_CCDC_WRITE = 0x20,
	OMAP3_ISP_SBL_PREVIEW_READ = 0x40,
	OMAP3_ISP_SBL_PREVIEW_WRITE = 0x80,
	OMAP3_ISP_SBL_RESIZER_READ = 0x100,
	OMAP3_ISP_SBL_RESIZER_WRITE = 0x200,
	};

	enum isp_subclk_resource {
	OMAP3_ISP_SUBCLK_CCDC = (1 << 0),
	OMAP3_ISP_SUBCLK_AEWB = (1 << 1),
	OMAP3_ISP_SUBCLK_AF = (1 << 2),
	OMAP3_ISP_SUBCLK_HIST = (1 << 3),
	OMAP3_ISP_SUBCLK_PREVIEW = (1 << 4),
	OMAP3_ISP_SUBCLK_RESIZER = (1 << 5),
	};

	/* ISP: OMAP 34xx ES 1.0 */
	#define ISP_REVISION_1_0 0x10
	/* ISP2: OMAP 34xx ES 2.0, 2.1 and 3.0 */
	#define ISP_REVISION_2_0 0x20
	/* ISP2P: OMAP 36xx */
	#define ISP_REVISION_15_0 0xF0

	/*
	* struct isp_res_mapping - Map ISP io resources to ISP revision.
	* @isp_rev: ISP_REVISION_x_x
	* @map: bitmap for enum isp_mem_resources
	*/
	struct isp_res_mapping {
	u32 isp_rev;
	u32 map;
	};

	/*
	* struct isp_reg - Structure for ISP register values.
	* @reg: 32-bit Register address.
	* @val: 32-bit Register value.
	*/
	struct isp_reg {
	enum isp_mem_resources mmio_range;
	u32 reg;
	u32 val;
	};

	struct isp_platform_callback {
	u32 (set_xclk)(struct isp_device isp, u32 xclk, u8 xclksel);
	};

	/*
	* struct isp_device - ISP device structure.
	* @dev: Device pointer specific to the OMAP3 ISP.
	* @revision: Stores current ISP module revision.
	* @irq_num: Currently used IRQ number.
	* @mmio_base: Array with kernel base addresses for ioremapped ISP register
	* regions.
	* @mmio_base_phys: Array with physical L4 bus addresses for ISP register
	* regions.
	* @mmio_size: Array with ISP register regions size in bytes.
	* @raw_dmamask: Raw DMA mask
	* @stat_lock: Spinlock for handling statistics
	* @isp_mutex: Mutex for serializing requests to ISP.
	* @crashed: Bitmask of crashed entities (indexed by entity ID)
	* @has_context: Context has been saved at least once and can be restored.
	* @ref_count: Reference count for handling multiple ISP requests.
	* @cam_ick: Pointer to camera interface clock structure.
	* @cam_mclk: Pointer to camera functional clock structure.
	* @csi2_fck: Pointer to camera CSI2 complexIO clock structure.
	* @l3_ick: Pointer to OMAP3 L3 bus interface clock.
	* @irq: Currently attached ISP ISR callbacks information structure.
	* @isp_af: Pointer to current settings for ISP AutoFocus SCM.
	* @isp_hist: Pointer to current settings for ISP Histogram SCM.
	* @isp_h3a: Pointer to current settings for ISP Auto Exposure and
	* White Balance SCM.
	* @isp_res: Pointer to current settings for ISP Resizer.
	* @isp_prev: Pointer to current settings for ISP Preview.
	* @isp_ccdc: Pointer to current settings for ISP CCDC.
	* @iommu: Pointer to requested IOMMU instance for ISP.
	* @platform_cb: ISP driver callback function pointers for platform code
	*
	* This structure is used to store the OMAP ISP Information.
	*/
	struct isp_device {
	struct v4l2_device v4l2_dev;
	struct media_device media_dev;
	struct device *dev;
	u32 revision;

	/* platform HW resources */
	struct isp_platform_data *pdata;
	unsigned int irq_num;

	void __iomem *mmio_base[OMAP3_ISP_IOMEM_LAST];
	unsigned long mmio_base_phys[OMAP3_ISP_IOMEM_LAST];
	resource_size_t mmio_size[OMAP3_ISP_IOMEM_LAST];

	u64 raw_dmamask;

	/* ISP Obj */
	spinlock_t stat_lock; /* common lock for statistic drivers */
	struct mutex isp_mutex; /* For handling ref_count field */
	u32 crashed;
	int has_context;
	int ref_count;
	unsigned int autoidle;
	u32 xclk_divisor[2]; /* Two clocks, a and b. */
	#define ISP_CLK_CAM_ICK 0
	#define ISP_CLK_CAM_MCLK 1
	#define ISP_CLK_CSI2_FCK 2
	#define ISP_CLK_L3_ICK 3
	struct clk *clock[4];

	/* ISP modules */
	struct ispstat isp_af;
	struct ispstat isp_aewb;
	struct ispstat isp_hist;
	struct isp_res_device isp_res;
	struct isp_prev_device isp_prev;
	struct isp_ccdc_device isp_ccdc;
	struct isp_csi2_device isp_csi2a;
	struct isp_csi2_device isp_csi2c;
	struct isp_ccp2_device isp_ccp2;
	struct isp_csiphy isp_csiphy1;
	struct isp_csiphy isp_csiphy2;

	unsigned int sbl_resources;
	unsigned int subclk_resources;

	struct iommu_domain *domain;

	struct isp_platform_callback platform_cb;
	};

	#define v4l2_dev_to_isp_device(dev) \
	container_of(dev, struct isp_device, v4l2_dev)

	void omap3isp_hist_dma_done(struct isp_device *isp);

	void omap3isp_flush(struct isp_device *isp);

	int omap3isp_module_sync_idle(struct media_entity me, wait_queue_head_t wait,
	atomic_t *stopping);

	int omap3isp_module_sync_is_stopping(wait_queue_head_t *wait,
	atomic_t *stopping);

	int omap3isp_pipeline_set_stream(struct isp_pipeline *pipe,
	enum isp_pipeline_stream_state state);
	void omap3isp_configure_bridge(struct isp_device *isp,
	enum ccdc_input_entity input,
	const struct isp_parallel_platform_data *pdata,
	unsigned int shift, unsigned int bridge);

	struct isp_device omap3isp_get(struct isp_device isp);
	void omap3isp_put(struct isp_device *isp);

	void omap3isp_print_status(struct isp_device *isp);

	void omap3isp_sbl_enable(struct isp_device *isp, enum isp_sbl_resource res);
	void omap3isp_sbl_disable(struct isp_device *isp, enum isp_sbl_resource res);

	void omap3isp_subclk_enable(struct isp_device *isp,
	enum isp_subclk_resource res);
	void omap3isp_subclk_disable(struct isp_device *isp,
	enum isp_subclk_resource res);

	int omap3isp_pipeline_pm_use(struct media_entity *entity, int use);

	int omap3isp_register_entities(struct platform_device *pdev,
	struct v4l2_device *v4l2_dev);
	void omap3isp_unregister_entities(struct platform_device *pdev);

	/*
	* isp_reg_readl - Read value of an OMAP3 ISP register
	* @dev: Device pointer specific to the OMAP3 ISP.
	* @isp_mmio_range: Range to which the register offset refers to.
	* @reg_offset: Register offset to read from.
	*
	* Returns an unsigned 32 bit value with the required register contents.
	*/
	static inline
	u32 isp_reg_readl(struct isp_device *isp, enum isp_mem_resources isp_mmio_range,
	u32 reg_offset)
	{
	return __raw_readl(isp->mmio_base[isp_mmio_range] + reg_offset);
	}

	/*
	* isp_reg_writel - Write value to an OMAP3 ISP register
	* @dev: Device pointer specific to the OMAP3 ISP.
	* @reg_value: 32 bit value to write to the register.
	* @isp_mmio_range: Range to which the register offset refers to.
	* @reg_offset: Register offset to write into.
	*/
	static inline
	void isp_reg_writel(struct isp_device *isp, u32 reg_value,
	enum isp_mem_resources isp_mmio_range, u32 reg_offset)
	{
	__raw_writel(reg_value, isp->mmio_base[isp_mmio_range] + reg_offset);
	}

	/*
	* isp_reg_and - Clear individual bits in an OMAP3 ISP register
	* @dev: Device pointer specific to the OMAP3 ISP.
	* @mmio_range: Range to which the register offset refers to.
	* @reg: Register offset to work on.
	* @clr_bits: 32 bit value which would be cleared in the register.
	*/
	static inline
	void isp_reg_clr(struct isp_device *isp, enum isp_mem_resources mmio_range,
	u32 reg, u32 clr_bits)
	{
	u32 v = isp_reg_readl(isp, mmio_range, reg);

	isp_reg_writel(isp, v & ~clr_bits, mmio_range, reg);
	}

	/*
	* isp_reg_set - Set individual bits in an OMAP3 ISP register
	* @dev: Device pointer specific to the OMAP3 ISP.
	* @mmio_range: Range to which the register offset refers to.
	* @reg: Register offset to work on.
	* @set_bits: 32 bit value which would be set in the register.
	*/
	static inline
	void isp_reg_set(struct isp_device *isp, enum isp_mem_resources mmio_range,
	u32 reg, u32 set_bits)
	{
	u32 v = isp_reg_readl(isp, mmio_range, reg);

	isp_reg_writel(isp, v \| set_bits, mmio_range, reg);
	}

	/*
	* isp_reg_clr_set - Clear and set invidial bits in an OMAP3 ISP register
	* @dev: Device pointer specific to the OMAP3 ISP.
	* @mmio_range: Range to which the register offset refers to.
	* @reg: Register offset to work on.
	* @clr_bits: 32 bit value which would be cleared in the register.
	* @set_bits: 32 bit value which would be set in the register.
	*
	* The clear operation is done first, and then the set operation.
	*/
	static inline
	void isp_reg_clr_set(struct isp_device *isp, enum isp_mem_resources mmio_range,
	u32 reg, u32 clr_bits, u32 set_bits)
	{
	u32 v = isp_reg_readl(isp, mmio_range, reg);

	isp_reg_writel(isp, (v & ~clr_bits) \| set_bits, mmio_range, reg);
	}

	static inline enum v4l2_buf_type
	isp_pad_buffer_type(const struct v4l2_subdev *subdev, int pad)
	{
	if (pad >= subdev->entity.num_pads)
	return 0;

	if (subdev->entity.pads[pad].flags & MEDIA_PAD_FL_SINK)
	return V4L2_BUF_TYPE_VIDEO_OUTPUT;
	else
	return V4L2_BUF_TYPE_VIDEO_CAPTURE;
	}

	#endif /* OMAP3_ISP_CORE_H */