[mirror_ubuntu-bionic-kernel.git] / include / media / soc_camera.h

/*
 * camera image capture (abstract) bus driver header
 *
 * Copyright (C) 2006, Sascha Hauer, Pengutronix
 * Copyright (C) 2008, Guennadi Liakhovetski <kernel@pengutronix.de>
 *
 * 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 SOC_CAMERA_H
#define SOC_CAMERA_H

#include <linux/bitops.h>
#include <linux/device.h>
#include <linux/mutex.h>
#include <linux/pm.h>
#include <linux/videodev2.h>
#include <media/videobuf2-v4l2.h>
#include <media/v4l2-async.h>
#include <media/v4l2-ctrls.h>
#include <media/v4l2-device.h>

struct file;
struct soc_camera_desc;
struct soc_camera_async_client;

struct soc_camera_device {
	struct list_head list;		/* list of all registered devices */
	struct soc_camera_desc *sdesc;
	struct device *pdev;		/* Platform device */
	struct device *parent;		/* Camera host device */
	struct device *control;		/* E.g., the i2c client */
	s32 user_width;
	s32 user_height;
	u32 bytesperline;		/* for padding, zero if unused */
	u32 sizeimage;
	enum v4l2_colorspace colorspace;
	unsigned char iface;		/* Host number */
	unsigned char devnum;		/* Device number per host */
	struct soc_camera_sense *sense;	/* See comment in struct definition */
	struct video_device *vdev;
	struct v4l2_ctrl_handler ctrl_handler;
	const struct soc_camera_format_xlate *current_fmt;
	struct soc_camera_format_xlate *user_formats;
	int num_user_formats;
	enum v4l2_field field;		/* Preserve field over close() */
	void *host_priv;		/* Per-device host private data */
	/* soc_camera.c private count. Only accessed with .host_lock held */
	int use_count;
	struct file *streamer;		/* stream owner */
	struct v4l2_clk *clk;
	/* Asynchronous subdevice management */
	struct soc_camera_async_client *sasc;
	/* video buffer queue */
	struct vb2_queue vb2_vidq;
};

/* Host supports programmable stride */
#define SOCAM_HOST_CAP_STRIDE		(1 << 0)

enum soc_camera_subdev_role {
	SOCAM_SUBDEV_DATA_SOURCE = 1,
	SOCAM_SUBDEV_DATA_SINK,
	SOCAM_SUBDEV_DATA_PROCESSOR,
};

struct soc_camera_async_subdev {
	struct v4l2_async_subdev asd;
	enum soc_camera_subdev_role role;
};

struct soc_camera_host {
	struct v4l2_device v4l2_dev;
	struct list_head list;
	struct mutex host_lock;		/* Main synchronisation lock */
	struct mutex clk_lock;		/* Protect pipeline modifications */
	unsigned char nr;		/* Host number */
	u32 capabilities;
	struct soc_camera_device *icd;	/* Currently attached client */
	void *priv;
	const char *drv_name;
	struct soc_camera_host_ops *ops;
	struct v4l2_async_subdev **asd;	/* Flat array, arranged in groups */
	unsigned int *asd_sizes;	/* 0-terminated array of asd group sizes */
};

struct soc_camera_host_ops {
	struct module *owner;
	int (*add)(struct soc_camera_device *);
	void (*remove)(struct soc_camera_device *);
	int (*clock_start)(struct soc_camera_host *);
	void (*clock_stop)(struct soc_camera_host *);
	/*
	 * .get_formats() is called for each client device format, but
	 * .put_formats() is only called once. Further, if any of the calls to
	 * .get_formats() fail, .put_formats() will not be called at all, the
	 * failing .get_formats() must then clean up internally.
	 */
	int (*get_formats)(struct soc_camera_device *, unsigned int,
			   struct soc_camera_format_xlate *);
	void (*put_formats)(struct soc_camera_device *);
	int (*get_selection)(struct soc_camera_device *, struct v4l2_selection *);
	int (*set_selection)(struct soc_camera_device *, struct v4l2_selection *);
	/*
	 * The difference to .set_selection() is, that .set_liveselection is not allowed
	 * to change the output sizes
	 */
	int (*set_liveselection)(struct soc_camera_device *, struct v4l2_selection *);
	int (*set_fmt)(struct soc_camera_device *, struct v4l2_format *);
	int (*try_fmt)(struct soc_camera_device *, struct v4l2_format *);
	int (*init_videobuf2)(struct vb2_queue *,
			      struct soc_camera_device *);
	int (*querycap)(struct soc_camera_host *, struct v4l2_capability *);
	int (*set_bus_param)(struct soc_camera_device *);
	int (*get_parm)(struct soc_camera_device *, struct v4l2_streamparm *);
	int (*set_parm)(struct soc_camera_device *, struct v4l2_streamparm *);
	int (*enum_framesizes)(struct soc_camera_device *, struct v4l2_frmsizeenum *);
	unsigned int (*poll)(struct file *, poll_table *);
};

#define SOCAM_SENSOR_INVERT_PCLK	(1 << 0)
#define SOCAM_SENSOR_INVERT_MCLK	(1 << 1)
#define SOCAM_SENSOR_INVERT_HSYNC	(1 << 2)
#define SOCAM_SENSOR_INVERT_VSYNC	(1 << 3)
#define SOCAM_SENSOR_INVERT_DATA	(1 << 4)

struct i2c_board_info;
struct regulator_bulk_data;

struct soc_camera_subdev_desc {
	/* Per camera SOCAM_SENSOR_* bus flags */
	unsigned long flags;

	/* sensor driver private platform data */
	void *drv_priv;

	/*
	 * Set unbalanced_power to true to deal with legacy drivers, failing to
	 * balance their calls to subdevice's .s_power() method. clock_state is
	 * then used internally by helper functions, it shouldn't be touched by
	 * drivers or the platform code.
	 */
	bool unbalanced_power;
	unsigned long clock_state;

	/* Optional callbacks to power on or off and reset the sensor */
	int (*power)(struct device *, int);
	int (*reset)(struct device *);

	/*
	 * some platforms may support different data widths than the sensors
	 * native ones due to different data line routing. Let the board code
	 * overwrite the width flags.
	 */
	int (*set_bus_param)(struct soc_camera_subdev_desc *, unsigned long flags);
	unsigned long (*query_bus_param)(struct soc_camera_subdev_desc *);
	void (*free_bus)(struct soc_camera_subdev_desc *);

	/* Optional regulators that have to be managed on power on/off events */
	struct v4l2_subdev_platform_data sd_pdata;
};

struct soc_camera_host_desc {
	/* Camera bus id, used to match a camera and a bus */
	int bus_id;
	int i2c_adapter_id;
	struct i2c_board_info *board_info;
	const char *module_name;

	/*
	 * For non-I2C devices platform has to provide methods to add a device
	 * to the system and to remove it
	 */
	int (*add_device)(struct soc_camera_device *);
	void (*del_device)(struct soc_camera_device *);
};

/*
 * Platform data for "soc-camera-pdrv"
 * This MUST be kept binary-identical to struct soc_camera_link below, until
 * it is completely replaced by this one, after which we can split it into its
 * two components.
 */
struct soc_camera_desc {
	struct soc_camera_subdev_desc subdev_desc;
	struct soc_camera_host_desc host_desc;
};

/* Prepare to replace this struct: don't change its layout any more! */
struct soc_camera_link {
	/*
	 * Subdevice part - keep at top and compatible to
	 * struct soc_camera_subdev_desc
	 */

	/* Per camera SOCAM_SENSOR_* bus flags */
	unsigned long flags;

	void *priv;

	/* Set by platforms to handle misbehaving drivers */
	bool unbalanced_power;
	/* Used by soc-camera helper functions */
	unsigned long clock_state;

	/* Optional callbacks to power on or off and reset the sensor */
	int (*power)(struct device *, int);
	int (*reset)(struct device *);
	/*
	 * some platforms may support different data widths than the sensors
	 * native ones due to different data line routing. Let the board code
	 * overwrite the width flags.
	 */
	int (*set_bus_param)(struct soc_camera_link *, unsigned long flags);
	unsigned long (*query_bus_param)(struct soc_camera_link *);
	void (*free_bus)(struct soc_camera_link *);

	/* Optional regulators that have to be managed on power on/off events */
	struct regulator_bulk_data *regulators;
	int num_regulators;

	void *host_priv;

	/*
	 * Host part - keep at bottom and compatible to
	 * struct soc_camera_host_desc
	 */

	/* Camera bus id, used to match a camera and a bus */
	int bus_id;
	int i2c_adapter_id;
	struct i2c_board_info *board_info;
	const char *module_name;

	/*
	 * For non-I2C devices platform has to provide methods to add a device
	 * to the system and to remove it
	 */
	int (*add_device)(struct soc_camera_device *);
	void (*del_device)(struct soc_camera_device *);
};

static inline struct soc_camera_host *to_soc_camera_host(
	const struct device *dev)
{
	struct v4l2_device *v4l2_dev = dev_get_drvdata(dev);

	return container_of(v4l2_dev, struct soc_camera_host, v4l2_dev);
}

static inline struct soc_camera_desc *to_soc_camera_desc(
	const struct soc_camera_device *icd)
{
	return icd->sdesc;
}

static inline struct device *to_soc_camera_control(
	const struct soc_camera_device *icd)
{
	return icd->control;
}

static inline struct v4l2_subdev *soc_camera_to_subdev(
	const struct soc_camera_device *icd)
{
	struct device *control = to_soc_camera_control(icd);
	return dev_get_drvdata(control);
}

int soc_camera_host_register(struct soc_camera_host *ici);
void soc_camera_host_unregister(struct soc_camera_host *ici);

const struct soc_camera_format_xlate *soc_camera_xlate_by_fourcc(
	struct soc_camera_device *icd, unsigned int fourcc);

/**
 * struct soc_camera_format_xlate - match between host and sensor formats
 * @code: code of a sensor provided format
 * @host_fmt: host format after host translation from code
 *
 * Host and sensor translation structure. Used in table of host and sensor
 * formats matchings in soc_camera_device. A host can override the generic list
 * generation by implementing get_formats(), and use it for format checks and
 * format setup.
 */
struct soc_camera_format_xlate {
	u32 code;
	const struct soc_mbus_pixelfmt *host_fmt;
};

#define SOCAM_SENSE_PCLK_CHANGED	(1 << 0)

/**
 * This struct can be attached to struct soc_camera_device by the host driver
 * to request sense from the camera, for example, when calling .set_fmt(). The
 * host then can check which flags are set and verify respective values if any.
 * For example, if SOCAM_SENSE_PCLK_CHANGED is set, it means, pixclock has
 * changed during this operation. After completion the host should detach sense.
 *
 * @flags		ored SOCAM_SENSE_* flags
 * @master_clock	if the host wants to be informed about pixel-clock
 *			change, it better set master_clock.
 * @pixel_clock_max	maximum pixel clock frequency supported by the host,
 *			camera is not allowed to exceed this.
 * @pixel_clock		if the camera driver changed pixel clock during this
 *			operation, it sets SOCAM_SENSE_PCLK_CHANGED, uses
 *			master_clock to calculate the new pixel-clock and
 *			sets this field.
 */
struct soc_camera_sense {
	unsigned long flags;
	unsigned long master_clock;
	unsigned long pixel_clock_max;
	unsigned long pixel_clock;
};

#define SOCAM_DATAWIDTH(x)	BIT((x) - 1)
#define SOCAM_DATAWIDTH_4	SOCAM_DATAWIDTH(4)
#define SOCAM_DATAWIDTH_8	SOCAM_DATAWIDTH(8)
#define SOCAM_DATAWIDTH_9	SOCAM_DATAWIDTH(9)
#define SOCAM_DATAWIDTH_10	SOCAM_DATAWIDTH(10)
#define SOCAM_DATAWIDTH_12	SOCAM_DATAWIDTH(12)
#define SOCAM_DATAWIDTH_15	SOCAM_DATAWIDTH(15)
#define SOCAM_DATAWIDTH_16	SOCAM_DATAWIDTH(16)
#define SOCAM_DATAWIDTH_18	SOCAM_DATAWIDTH(18)
#define SOCAM_DATAWIDTH_24	SOCAM_DATAWIDTH(24)

#define SOCAM_DATAWIDTH_MASK (SOCAM_DATAWIDTH_4 | SOCAM_DATAWIDTH_8 | \
			      SOCAM_DATAWIDTH_9 | SOCAM_DATAWIDTH_10 | \
			      SOCAM_DATAWIDTH_12 | SOCAM_DATAWIDTH_15 | \
			      SOCAM_DATAWIDTH_16 | SOCAM_DATAWIDTH_18 | \
			      SOCAM_DATAWIDTH_24)

static inline void soc_camera_limit_side(int *start, int *length,
		unsigned int start_min,
		unsigned int length_min, unsigned int length_max)
{
	if (*length < length_min)
		*length = length_min;
	else if (*length > length_max)
		*length = length_max;

	if (*start < start_min)
		*start = start_min;
	else if (*start > start_min + length_max - *length)
		*start = start_min + length_max - *length;
}

unsigned long soc_camera_apply_board_flags(struct soc_camera_subdev_desc *ssdd,
					   const struct v4l2_mbus_config *cfg);

int soc_camera_power_init(struct device *dev, struct soc_camera_subdev_desc *ssdd);
int soc_camera_power_on(struct device *dev, struct soc_camera_subdev_desc *ssdd,
			struct v4l2_clk *clk);
int soc_camera_power_off(struct device *dev, struct soc_camera_subdev_desc *ssdd,
			 struct v4l2_clk *clk);

static inline int soc_camera_set_power(struct device *dev,
		struct soc_camera_subdev_desc *ssdd, struct v4l2_clk *clk, bool on)
{
	return on ? soc_camera_power_on(dev, ssdd, clk)
		  : soc_camera_power_off(dev, ssdd, clk);
}

/* This is only temporary here - until v4l2-subdev begins to link to video_device */
#include <linux/i2c.h>
static inline struct video_device *soc_camera_i2c_to_vdev(const struct i2c_client *client)
{
	struct v4l2_subdev *sd = i2c_get_clientdata(client);
	struct soc_camera_device *icd = v4l2_get_subdev_hostdata(sd);
	return icd ? icd->vdev : NULL;
}

static inline struct soc_camera_subdev_desc *soc_camera_i2c_to_desc(const struct i2c_client *client)
{
	return client->dev.platform_data;
}

static inline struct v4l2_subdev *soc_camera_vdev_to_subdev(struct video_device *vdev)
{
	struct soc_camera_device *icd = video_get_drvdata(vdev);
	return soc_camera_to_subdev(icd);
}

static inline struct soc_camera_device *soc_camera_from_vb2q(const struct vb2_queue *vq)
{
	return container_of(vq, struct soc_camera_device, vb2_vidq);
}

static inline u32 soc_camera_grp_id(const struct soc_camera_device *icd)
{
	return (icd->iface << 8) | (icd->devnum + 1);
}

void soc_camera_lock(struct vb2_queue *vq);
void soc_camera_unlock(struct vb2_queue *vq);

#endif
Commit	Line	Data
e55222ef GL	1	/*
	2	* camera image capture (abstract) bus driver header
	3	*
	4	* Copyright (C) 2006, Sascha Hauer, Pengutronix
	5	* Copyright (C) 2008, Guennadi Liakhovetski <kernel@pengutronix.de>
	6	*
	7	* This program is free software; you can redistribute it and/or modify
	8	* it under the terms of the GNU General Public License version 2 as
	9	* published by the Free Software Foundation.
	10	*/
	11
	12	#ifndef SOC_CAMERA_H
	13	#define SOC_CAMERA_H
	14
d839fe17	15	#include <linux/bitops.h>
52d268a3	16	#include <linux/device.h>
1c3bb743 GL	17	#include <linux/mutex.h>
1c3bb743 GL	18	#include <linux/pm.h>
e55222ef	19	#include <linux/videodev2.h>
c139990e	20	#include <media/videobuf2-v4l2.h>
e09da11d	21	#include <media/v4l2-async.h>
ee02da64	22	#include <media/v4l2-ctrls.h>
979ea1dd	23	#include <media/v4l2-device.h>
e55222ef	24
57bee29d	25	struct file;
25a34811	26	struct soc_camera_desc;
e09da11d	27	struct soc_camera_async_client;
57bee29d	28
e55222ef	29	struct soc_camera_device {
d33b290a	30	struct list_head list; /* list of all registered devices */
25a34811	31	struct soc_camera_desc *sdesc;
979ea1dd	32	struct device pdev; / Platform device */
7dfff953 GL	33	struct device parent; / Camera host device */
7dfff953 GL	34	struct device control; / E.g., the i2c client */
6a6c8786 GL	35	s32 user_width;
6a6c8786 GL	36	s32 user_height;
0e4c180d SA	37	u32 bytesperline; /* for padding, zero if unused */
0e4c180d SA	38	u32 sizeimage;
760697be	39	enum v4l2_colorspace colorspace;
e55222ef GL	40	unsigned char iface; /* Host number */
e55222ef GL	41	unsigned char devnum; /* Device number per host */
a9bef518	42	struct soc_camera_sense sense; / See comment in struct definition */
e55222ef	43	struct video_device *vdev;
ee02da64	44	struct v4l2_ctrl_handler ctrl_handler;
760697be	45	const struct soc_camera_format_xlate *current_fmt;
c2786ad2 GL	46	struct soc_camera_format_xlate *user_formats;
c2786ad2 GL	47	int num_user_formats;
025c18a1	48	enum v4l2_field field; /* Preserve field over close() */
1c3bb743	49	void host_priv; / Per-device host private data */
dd669e90	50	/* soc_camera.c private count. Only accessed with .host_lock held */
9dc4e48f	51	int use_count;
57bee29d	52	struct file streamer; / stream owner */
9aea470b	53	struct v4l2_clk *clk;
e09da11d GL	54	/* Asynchronous subdevice management */
	55	struct soc_camera_async_client *sasc;
	56	/* video buffer queue */
73a01599	57	struct vb2_queue vb2_vidq;
e55222ef GL	58	};
e55222ef GL	59
914f05c8 LP	60	/* Host supports programmable stride */
	61	#define SOCAM_HOST_CAP_STRIDE (1 << 0)
	62
e09da11d GL	63	enum soc_camera_subdev_role {
	64	SOCAM_SUBDEV_DATA_SOURCE = 1,
	65	SOCAM_SUBDEV_DATA_SINK,
	66	SOCAM_SUBDEV_DATA_PROCESSOR,
	67	};
	68
	69	struct soc_camera_async_subdev {
	70	struct v4l2_async_subdev asd;
	71	enum soc_camera_subdev_role role;
	72	};
	73
e55222ef	74	struct soc_camera_host {
979ea1dd	75	struct v4l2_device v4l2_dev;
e55222ef	76	struct list_head list;
e09da11d GL	77	struct mutex host_lock; /* Main synchronisation lock */
e09da11d GL	78	struct mutex clk_lock; /* Protect pipeline modifications */
2f9a0c88	79	unsigned char nr; /* Host number */
914f05c8	80	u32 capabilities;
f7f6ce2d	81	struct soc_camera_device icd; / Currently attached client */
e55222ef	82	void *priv;
af128a10	83	const char *drv_name;
b8d9904c	84	struct soc_camera_host_ops *ops;
e09da11d	85	struct v4l2_async_subdev *asd; / Flat array, arranged in groups */
f687f326	86	unsigned int asd_sizes; / 0-terminated array of asd group sizes */
b8d9904c GL	87	};
	88
	89	struct soc_camera_host_ops {
	90	struct module *owner;
e55222ef GL	91	int (add)(struct soc_camera_device );
e55222ef GL	92	void (remove)(struct soc_camera_device );
eb569cf9 GL	93	int (clock_start)(struct soc_camera_host );
eb569cf9 GL	94	void (clock_stop)(struct soc_camera_host );
fa48984e GL	95	/*
	96	* .get_formats() is called for each client device format, but
	97	* .put_formats() is only called once. Further, if any of the calls to
	98	* .get_formats() fail, .put_formats() will not be called at all, the
	99	* failing .get_formats() must then clean up internally.
	100	*/
3805f201	101	int (get_formats)(struct soc_camera_device , unsigned int,
c2786ad2	102	struct soc_camera_format_xlate *);
fa48984e	103	void (put_formats)(struct soc_camera_device );
3bfb4100 GL	104	int (get_selection)(struct soc_camera_device , struct v4l2_selection *);
3bfb4100 GL	105	int (set_selection)(struct soc_camera_device , struct v4l2_selection *);
aee5c2f1	106	/*
10d5509c	107	* The difference to .set_selection() is, that .set_liveselection is not allowed
aee5c2f1 GL	108	* to change the output sizes
aee5c2f1 GL	109	*/
10d5509c	110	int (set_liveselection)(struct soc_camera_device , struct v4l2_selection *);
09e231b3	111	int (set_fmt)(struct soc_camera_device , struct v4l2_format *);
d8fac217	112	int (try_fmt)(struct soc_camera_device , struct v4l2_format *);
592c2aba GL	113	int (init_videobuf2)(struct vb2_queue ,
592c2aba GL	114	struct soc_camera_device *);
e55222ef	115	int (querycap)(struct soc_camera_host , struct v4l2_capability *);
8843d119	116	int (set_bus_param)(struct soc_camera_device );
c9f6ef69 GL	117	int (get_parm)(struct soc_camera_device , struct v4l2_streamparm *);
c9f6ef69 GL	118	int (set_parm)(struct soc_camera_device , struct v4l2_streamparm *);
ad3537b5	119	int (enum_framesizes)(struct soc_camera_device , struct v4l2_frmsizeenum *);
e55222ef GL	120	unsigned int (poll)(struct file , poll_table *);
	121	};
	122
bd73b36f GL	123	#define SOCAM_SENSOR_INVERT_PCLK (1 << 0)
	124	#define SOCAM_SENSOR_INVERT_MCLK (1 << 1)
	125	#define SOCAM_SENSOR_INVERT_HSYNC (1 << 2)
	126	#define SOCAM_SENSOR_INVERT_VSYNC (1 << 3)
	127	#define SOCAM_SENSOR_INVERT_DATA (1 << 4)
	128
0fd327bd	129	struct i2c_board_info;
96e442c1	130	struct regulator_bulk_data;
0fd327bd	131
25a34811	132	struct soc_camera_subdev_desc {
bd73b36f GL	133	/* Per camera SOCAM_SENSOR_* bus flags */
bd73b36f GL	134	unsigned long flags;
25a34811 GL	135
	136	/* sensor driver private platform data */
	137	void *drv_priv;
3fd7ceff	138
40f07533 GL	139	/*
	140	* Set unbalanced_power to true to deal with legacy drivers, failing to
	141	* balance their calls to subdevice's .s_power() method. clock_state is
	142	* then used internally by helper functions, it shouldn't be touched by
	143	* drivers or the platform code.
	144	*/
	145	bool unbalanced_power;
	146	unsigned long clock_state;
	147
25a34811 GL	148	/* Optional callbacks to power on or off and reset the sensor */
	149	int (power)(struct device , int);
	150	int (reset)(struct device );
	151
	152	/*
	153	* some platforms may support different data widths than the sensors
	154	* native ones due to different data line routing. Let the board code
	155	* overwrite the width flags.
	156	*/
	157	int (set_bus_param)(struct soc_camera_subdev_desc , unsigned long flags);
	158	unsigned long (query_bus_param)(struct soc_camera_subdev_desc );
	159	void (free_bus)(struct soc_camera_subdev_desc );
d3f884a7 GL	160
	161	/* Optional regulators that have to be managed on power on/off events */
	162	struct v4l2_subdev_platform_data sd_pdata;
25a34811 GL	163	};
	164
	165	struct soc_camera_host_desc {
	166	/* Camera bus id, used to match a camera and a bus */
	167	int bus_id;
	168	int i2c_adapter_id;
	169	struct i2c_board_info *board_info;
	170	const char *module_name;
	171
c41debaf	172	/*
d33b290a GL	173	* For non-I2C devices platform has to provide methods to add a device
d33b290a GL	174	* to the system and to remove it
c41debaf	175	*/
7dfff953 GL	176	int (add_device)(struct soc_camera_device );
7dfff953 GL	177	void (del_device)(struct soc_camera_device );
25a34811 GL	178	};
	179
	180	/*
e09da11d	181	* Platform data for "soc-camera-pdrv"
25a34811 GL	182	* This MUST be kept binary-identical to struct soc_camera_link below, until
	183	* it is completely replaced by this one, after which we can split it into its
	184	* two components.
	185	*/
	186	struct soc_camera_desc {
	187	struct soc_camera_subdev_desc subdev_desc;
	188	struct soc_camera_host_desc host_desc;
	189	};
	190
	191	/* Prepare to replace this struct: don't change its layout any more! */
	192	struct soc_camera_link {
	193	/*
	194	* Subdevice part - keep at top and compatible to
	195	* struct soc_camera_subdev_desc
	196	*/
	197
	198	/* Per camera SOCAM_SENSOR_* bus flags */
	199	unsigned long flags;
	200
	201	void *priv;
	202
40f07533 GL	203	/* Set by platforms to handle misbehaving drivers */
	204	bool unbalanced_power;
	205	/* Used by soc-camera helper functions */
	206	unsigned long clock_state;
	207
81034663 SH	208	/* Optional callbacks to power on or off and reset the sensor */
	209	int (power)(struct device , int);
	210	int (reset)(struct device );
28f59339 SH	211	/*
	212	* some platforms may support different data widths than the sensors
	213	* native ones due to different data line routing. Let the board code
	214	* overwrite the width flags.
	215	*/
	216	int (set_bus_param)(struct soc_camera_link , unsigned long flags);
	217	unsigned long (query_bus_param)(struct soc_camera_link );
594bb46d	218	void (free_bus)(struct soc_camera_link );
25a34811	219
d3f884a7 GL	220	/* Optional regulators that have to be managed on power on/off events */
	221	struct regulator_bulk_data *regulators;
	222	int num_regulators;
	223
	224	void *host_priv;
	225
25a34811 GL	226	/*
	227	* Host part - keep at bottom and compatible to
	228	* struct soc_camera_host_desc
	229	*/
	230
	231	/* Camera bus id, used to match a camera and a bus */
	232	int bus_id;
	233	int i2c_adapter_id;
	234	struct i2c_board_info *board_info;
	235	const char *module_name;
	236
	237	/*
	238	* For non-I2C devices platform has to provide methods to add a device
	239	* to the system and to remove it
	240	*/
	241	int (add_device)(struct soc_camera_device );
	242	void (del_device)(struct soc_camera_device );
e55222ef GL	243	};
e55222ef GL	244
96c75399 GL	245	static inline struct soc_camera_host *to_soc_camera_host(
96c75399 GL	246	const struct device *dev)
e55222ef	247	{
979ea1dd GL	248	struct v4l2_device *v4l2_dev = dev_get_drvdata(dev);
	249
	250	return container_of(v4l2_dev, struct soc_camera_host, v4l2_dev);
e55222ef GL	251	}
e55222ef GL	252
25a34811	253	static inline struct soc_camera_desc *to_soc_camera_desc(
96c75399	254	const struct soc_camera_device *icd)
40e2e092	255	{
25a34811	256	return icd->sdesc;
40e2e092	257	}
e55222ef	258
96c75399 GL	259	static inline struct device *to_soc_camera_control(
96c75399 GL	260	const struct soc_camera_device *icd)
40e2e092	261	{
7dfff953	262	return icd->control;
40e2e092	263	}
e55222ef	264
96c75399 GL	265	static inline struct v4l2_subdev *soc_camera_to_subdev(
96c75399 GL	266	const struct soc_camera_device *icd)
c9c1f1c0 GL	267	{
	268	struct device *control = to_soc_camera_control(icd);
	269	return dev_get_drvdata(control);
	270	}
	271
40e2e092 GL	272	int soc_camera_host_register(struct soc_camera_host *ici);
	273	void soc_camera_host_unregister(struct soc_camera_host *ici);
	274
40e2e092	275	const struct soc_camera_format_xlate *soc_camera_xlate_by_fourcc(
c2786ad2	276	struct soc_camera_device *icd, unsigned int fourcc);
25c4d74e	277
c2786ad2 GL	278	/**
c2786ad2 GL	279	* struct soc_camera_format_xlate - match between host and sensor formats
760697be GL	280	* @code: code of a sensor provided format
760697be GL	281	* @host_fmt: host format after host translation from code
c2786ad2 GL	282	*
	283	* Host and sensor translation structure. Used in table of host and sensor
	284	* formats matchings in soc_camera_device. A host can override the generic list
	285	* generation by implementing get_formats(), and use it for format checks and
	286	* format setup.
	287	*/
	288	struct soc_camera_format_xlate {
27ffaeb0	289	u32 code;
760697be	290	const struct soc_mbus_pixelfmt *host_fmt;
c2786ad2 GL	291	};
c2786ad2 GL	292
a9bef518 GL	293	#define SOCAM_SENSE_PCLK_CHANGED (1 << 0)
	294
	295	/**
	296	* This struct can be attached to struct soc_camera_device by the host driver
	297	* to request sense from the camera, for example, when calling .set_fmt(). The
	298	* host then can check which flags are set and verify respective values if any.
	299	* For example, if SOCAM_SENSE_PCLK_CHANGED is set, it means, pixclock has
	300	* changed during this operation. After completion the host should detach sense.
	301	*
	302	* @flags ored SOCAM_SENSE_* flags
	303	* @master_clock if the host wants to be informed about pixel-clock
	304	* change, it better set master_clock.
	305	* @pixel_clock_max maximum pixel clock frequency supported by the host,
	306	* camera is not allowed to exceed this.
	307	* @pixel_clock if the camera driver changed pixel clock during this
	308	* operation, it sets SOCAM_SENSE_PCLK_CHANGED, uses
	309	* master_clock to calculate the new pixel-clock and
	310	* sets this field.
	311	*/
	312	struct soc_camera_sense {
	313	unsigned long flags;
	314	unsigned long master_clock;
	315	unsigned long pixel_clock_max;
	316	unsigned long pixel_clock;
	317	};
	318
d839fe17 GL	319	#define SOCAM_DATAWIDTH(x) BIT((x) - 1)
	320	#define SOCAM_DATAWIDTH_4 SOCAM_DATAWIDTH(4)
	321	#define SOCAM_DATAWIDTH_8 SOCAM_DATAWIDTH(8)
	322	#define SOCAM_DATAWIDTH_9 SOCAM_DATAWIDTH(9)
	323	#define SOCAM_DATAWIDTH_10 SOCAM_DATAWIDTH(10)
7b88fc08	324	#define SOCAM_DATAWIDTH_12 SOCAM_DATAWIDTH(12)
d839fe17 GL	325	#define SOCAM_DATAWIDTH_15 SOCAM_DATAWIDTH(15)
d839fe17 GL	326	#define SOCAM_DATAWIDTH_16 SOCAM_DATAWIDTH(16)
7b88fc08 PE	327	#define SOCAM_DATAWIDTH_18 SOCAM_DATAWIDTH(18)
7b88fc08 PE	328	#define SOCAM_DATAWIDTH_24 SOCAM_DATAWIDTH(24)
042d8790 GL	329
	330	#define SOCAM_DATAWIDTH_MASK (SOCAM_DATAWIDTH_4 \| SOCAM_DATAWIDTH_8 \| \
	331	SOCAM_DATAWIDTH_9 \| SOCAM_DATAWIDTH_10 \| \
7b88fc08 PE	332	SOCAM_DATAWIDTH_12 \| SOCAM_DATAWIDTH_15 \| \
	333	SOCAM_DATAWIDTH_16 \| SOCAM_DATAWIDTH_18 \| \
	334	SOCAM_DATAWIDTH_24)
ad5f2e85	335
e26b3144 MN	336	static inline void soc_camera_limit_side(int start, int length,
e26b3144 MN	337	unsigned int start_min,
6a6c8786 GL	338	unsigned int length_min, unsigned int length_max)
	339	{
	340	if (*length < length_min)
	341	*length = length_min;
	342	else if (*length > length_max)
	343	*length = length_max;
	344
	345	if (*start < start_min)
	346	*start = start_min;
	347	else if (start > start_min + length_max - length)
	348	start = start_min + length_max - length;
	349	}
	350
25a34811	351	unsigned long soc_camera_apply_board_flags(struct soc_camera_subdev_desc *ssdd,
32c69fcc	352	const struct v4l2_mbus_config *cfg);
bd73b36f	353
e09da11d	354	int soc_camera_power_init(struct device dev, struct soc_camera_subdev_desc ssdd);
9aea470b GL	355	int soc_camera_power_on(struct device dev, struct soc_camera_subdev_desc ssdd,
	356	struct v4l2_clk *clk);
	357	int soc_camera_power_off(struct device dev, struct soc_camera_subdev_desc ssdd,
	358	struct v4l2_clk *clk);
4ec10bac LP	359
4ec10bac LP	360	static inline int soc_camera_set_power(struct device *dev,
9aea470b	361	struct soc_camera_subdev_desc ssdd, struct v4l2_clk clk, bool on)
4ec10bac	362	{
9aea470b GL	363	return on ? soc_camera_power_on(dev, ssdd, clk)
9aea470b GL	364	: soc_camera_power_off(dev, ssdd, clk);
4ec10bac LP	365	}
4ec10bac LP	366
4f9fb5ed MCC	367	/* This is only temporary here - until v4l2-subdev begins to link to video_device */
4f9fb5ed MCC	368	#include <linux/i2c.h>
14178aa5	369	static inline struct video_device soc_camera_i2c_to_vdev(const struct i2c_client client)
4f9fb5ed	370	{
2f0babb7	371	struct v4l2_subdev *sd = i2c_get_clientdata(client);
4c0b036d	372	struct soc_camera_device *icd = v4l2_get_subdev_hostdata(sd);
14178aa5	373	return icd ? icd->vdev : NULL;
4f9fb5ed MCC	374	}
4f9fb5ed MCC	375
25a34811	376	static inline struct soc_camera_subdev_desc soc_camera_i2c_to_desc(const struct i2c_client client)
14178aa5	377	{
2f0babb7	378	return client->dev.platform_data;
14178aa5 GL	379	}
14178aa5 GL	380
14381c26	381	static inline struct v4l2_subdev soc_camera_vdev_to_subdev(struct video_device vdev)
14178aa5	382	{
14381c26	383	struct soc_camera_device *icd = video_get_drvdata(vdev);
14178aa5 GL	384	return soc_camera_to_subdev(icd);
	385	}
	386
14178aa5	387	static inline struct soc_camera_device soc_camera_from_vb2q(const struct vb2_queue vq)
8eb4476d GL	388	{
	389	return container_of(vq, struct soc_camera_device, vb2_vidq);
	390	}
	391
4c0b036d GL	392	static inline u32 soc_camera_grp_id(const struct soc_camera_device *icd)
	393	{
	394	return (icd->iface << 8) \| (icd->devnum + 1);
	395	}
	396
592c2aba GL	397	void soc_camera_lock(struct vb2_queue *vq);
	398	void soc_camera_unlock(struct vb2_queue *vq);
	399
e55222ef	400	#endif