#ifndef _MARVELL_CAMERA_H_
#define _MARVELL_CAMERA_H_

#include <linux/delay.h>
#include <media/soc_camera.h>

#define MHZ					1000000
/* Sensor installation related */
enum {
	SENSOR_USED		= (1 << 31),
	SENSOR_UNUSED		= 0,
	SENSOR_POS_LEFT		= (1 << 2),
	SENSOR_POS_RIGHT	= 0,
	SENSOR_POS_FRONT	= (1 << 1),
	SENSOR_POS_BACK		= 0,
	SENSOR_RES_HIGH		= (1 << 0),
	SENSOR_RES_LOW		= 0,
};

struct sensor_board_data {
	/* Sensor connector install orientation */
	int mount_pos;

	/* Data bus H/W interface */
	enum v4l2_mbus_type bus_type;
	unsigned int flags;
	int bus_flag;		/* Mediabus defined flags */

	/* Pointer to platform data structure */
	void *plat;

	/* Per sensor MIPI config */
	int dphy[3];		/* DPHY: CSI2_DPHY3, CSI2_DPHY5, CSI2_DPHY6 */
	int dphy3_algo;		/* Exist 2 algos for calculate CSI2_DPHY3 */
	int mipi_enabled;	/* MIPI enabled flag */

	/* Board specific function pointers, I.E. LED/flash/tuner/lens */
	/* The handle to control "coupled" flash chip */
	int (*v4l2_flash_if)(void *ctrl, bool op);
	/* TODO: add more function handler to control "coupled" actuators */
};

/* MIPI related */
/* Sensor MIPI behavior descriptor, sensor driver should pass it to controller
 * driver, and let controller driver decide how to config its PHY registers */
struct csi_dphy_desc {
	u32 clk_mul;
	u32 clk_div;	/* clock_lane_freq = input_clock * clk_mul / clk_div */
	u32 clk_freq;
	u32 cl_prepare;	/* cl_* describes clock lane timing in the unit of ns */
	u32 cl_zero;
	u32 hs_prepare;	/* hs_* describes data LP to HS transition timing */
	u32 hs_zero;	/* in the unit of clock lane period(DDR period) */
	u32 nr_lane;	/* When set to 0, S/W will try to figure out a value */
};

static inline int csi2phy_desc_to_mbus_cfg(struct csi_dphy_desc *dsc,
					struct v4l2_mbus_config *cfg)
{
	if (dsc == NULL)
		return -EINVAL;

	if ((dsc->nr_lane < 1) || (dsc->nr_lane > 4))
		return -ERANGE;

	cfg->type = V4L2_MBUS_CSI2;
	cfg->flags = (V4L2_MBUS_CSI2_1_LANE << (dsc->nr_lane - 1));
	return 0;
}

#define HS_SETTLE_POS_MAX (100)
struct csi_dphy_calc {
	char name[16];
	int hs_termen_pos;
	int hs_settle_pos;	/* 0~100 */
};

/* Controller driver PHY register data, maybe need to add more item for other
 * controller type */
struct csi_dphy_reg {
	u16 cl_termen;
	u16 cl_settle;
	u16 cl_miss;
	u16 hs_termen;
	u16 hs_settle;
	u16 hs_rx_to;
	u16 lane;	/* When set to 0, S/W will try to figure out a value */
	u16 vc;		/* Virtual channel */
	u16 dt1;	/* Data type 1: For video or main data type */
	u16 dt2;	/* Data type 2: For thumbnail or auxiliry data type */
};

struct mipi_csi2 {
	int dphy[3]; /* DPHY: CSI2_DPHY3, CSI2_DPHY5, CSI2_DPHY6 */
	int calc_dphy;
	struct csi_dphy_desc dphy_desc;
	int enable_dpcm;
};

/*
 * the min/max is for calcuting DPHY, the unit is ns.
 */
#define D_TERMEN_MAX (35)
#define HS_PREP_MIN  (40)
#define HS_PREP_MAX  (85)
#define HS_PREP_ZERO_MIN  (145)
#define NS_TO_PS(nsec) ((nsec) * 1000)

/*
 * Add macro definiton for sensor power.
 * Plese note the POWER_OFF and POWER_ON
 * value is fixed since in soc_camera.c
 * the value is directly used.
 */
#define POWER_OFF	0
#define POWER_ON	1
#define POWER_SAVING	2
#define POWER_RESTORE	3

/*
 * Add macro definiton for CCIC controller.
 */
#define MIPI_DISABLE	(0 << 1)
#define MIPI_ENABLE	(1 << 1)

/* V4L2 control related */
enum vdev_buffer_layout {
	VDEV_BUFFER_LAYOUT_PA_CONTIG	= 0,
	VDEV_BUFFER_LAYOUT_VA_CONTIG,
};

#define V4L2_CID_PRIVATE_FIRMWARE_DOWNLOAD	\
		(V4L2_CID_CAMERA_CLASS_BASE + 0x1000)
#define V4L2_CID_PRIVATE_GET_MIPI_PHY	\
		(V4L2_CID_CAMERA_CLASS_BASE + 0x1001)
#define V4L2_CID_VDEV_BUFFER_LAYOUT	\
		(V4L2_CID_CAMERA_CLASS_BASE + 0x1002)
#define V4L2_CID_VDEV_BUFFER_DETAIN_NUM	\
		(V4L2_CID_CAMERA_CLASS_BASE + 0x1003)
#define V4L2_CID_VDEV_ENABLE_NO_ZOOM\
		(V4L2_CID_CAMERA_CLASS_BASE + 0x1004)

/* sleep function for sensor power sequence, only provide 1ms precision */
/* According to Documentation/timers/timers-howto.txt, we should choose *sleep
 * family function according to the time:
 * >= 20ms	msleep
 * >= 10us	usleep
 * for camera power usecase, we mostly need 1~2ms for power on/off sequence and
 * 100~500us for software reset, no precision control below 100us is used,
 * so sleep_range is good enough for us */
#define cam_msleep(x) \
do { \
	unsigned int ms = (x); \
	if (ms >= 20) \
		msleep(ms); \
	else \
		usleep_range(ms*1000, ms*1000+100); \
} while (0)

#endif