drivers/media/video/em28xx/em28xx.h - LeafOS-Devices/android_kernel_samsung_universal7904 - Gitiles

 /*
    em2820-cards.c - driver for Empia EM2800/EM2820/2840 USB video capture devices

    Copyright (C) 2005 Markus Rechberger <mrechberger@gmail.com>
 		      Ludovico Cavedon <cavedon@sssup.it>
 		      Mauro Carvalho Chehab <mchehab@brturbo.com.br>

    Based on the em2800 driver from Sascha Sommer <saschasommer@freenet.de>

    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.

    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., 675 Mass Ave, Cambridge, MA 02139, USA.
  */

 #ifndef _EM2820_H
 #define _EM2820_H

 #include <linux/videodev.h>
 #include <linux/i2c.h>
 #include <media/ir-kbd-i2c.h>

 /* Boards supported by driver */

 #define EM2800_BOARD_UNKNOWN			0
 #define EM2820_BOARD_UNKNOWN			1
 #define EM2820_BOARD_TERRATEC_CINERGY_250	2
 #define EM2820_BOARD_PINNACLE_USB_2		3
 #define EM2820_BOARD_HAUPPAUGE_WINTV_USB_2      4
 #define EM2820_BOARD_MSI_VOX_USB_2              5
 #define EM2800_BOARD_TERRATEC_CINERGY_200       6
 #define EM2800_BOARD_LEADTEK_WINFAST_USBII      7
 #define EM2800_BOARD_KWORLD_USB2800             8

 #define UNSET -1

 /* maximum number of em28xx boards */
 #define EM2820_MAXBOARDS 1 /*FIXME: should be bigger */

 /* maximum number of frames that can be queued */
 #define EM2820_NUM_FRAMES 5
 /* number of frames that get used for v4l2_read() */
 #define EM2820_NUM_READ_FRAMES 2

 /* number of buffers for isoc transfers */
 #define EM2820_NUM_BUFS 5

 /* number of packets for each buffer
    windows requests only 40 packets .. so we better do the same
    this is what I found out for all alternate numbers there!
  */
 #define EM2820_NUM_PACKETS 40

 /* default alternate; 0 means choose the best */
 #define EM2820_PINOUT 0
 #define EM2820_MAX_ALT 7

 #define EM2820_INTERLACED_DEFAULT 1

 /*
 #define (use usbview if you want to get the other alternate number infos)
 #define
 #define alternate number 2
 #define 			Endpoint Address: 82
 			Direction: in
 			Attribute: 1
 			Type: Isoc
 			Max Packet Size: 1448
 			Interval: 125us

   alternate number 7

 			Endpoint Address: 82
 			Direction: in
 			Attribute: 1
 			Type: Isoc
 			Max Packet Size: 3072
 			Interval: 125us
 */

 /* time to wait when stopping the isoc transfer */
 #define EM2820_URB_TIMEOUT       msecs_to_jiffies(EM2820_NUM_BUFS * EM2820_NUM_PACKETS)

 /* time in msecs to wait for i2c writes to finish */
 #define EM2800_I2C_WRITE_TIMEOUT 20

 /* the various frame states */
 enum em2820_frame_state {
 	F_UNUSED = 0,
 	F_QUEUED,
 	F_GRABBING,
 	F_DONE,
 	F_ERROR,
 };

 /* stream states */
 enum em2820_stream_state {
 	STREAM_OFF,
 	STREAM_INTERRUPT,
 	STREAM_ON,
 };

 /* frames */
 struct em2820_frame_t {
 	void *bufmem;
 	struct v4l2_buffer buf;
 	enum em2820_frame_state state;
 	struct list_head frame;
 	unsigned long vma_use_count;
 	int top_field;
 	int fieldbytesused;
 };

 /* io methods */
 enum em2820_io_method {
 	IO_NONE,
 	IO_READ,
 	IO_MMAP,
 };

 /* inputs */

 #define MAX_EM2820_INPUT 4
 enum enum2820_itype {
 	EM2820_VMUX_COMPOSITE1 = 1,
 	EM2820_VMUX_COMPOSITE2,
 	EM2820_VMUX_COMPOSITE3,
 	EM2820_VMUX_COMPOSITE4,
 	EM2820_VMUX_SVIDEO,
 	EM2820_VMUX_TELEVISION,
 	EM2820_VMUX_CABLE,
 	EM2820_VMUX_DVB,
 	EM2820_VMUX_DEBUG,
 	EM2820_RADIO,
 };

 struct em2820_input {
 	enum enum2820_itype type;
 	unsigned int vmux;
 	unsigned int amux;
 };

 #define INPUT(nr) (&em2820_boards[dev->model].input[nr])

 enum em2820_decoder {
 	EM2820_TVP5150,
 	EM2820_SAA7113,
 	EM2820_SAA7114
 };

 struct em2820_board {
 	char *name;
 	int vchannels;
 	int norm;
 	int tuner_type;

 	/* i2c flags */
 	unsigned int is_em2800;
 	unsigned int tda9887_conf;

 	unsigned int has_tuner:1;
 	unsigned int has_msp34xx:1;

 	enum em2820_decoder decoder;

 	struct em2820_input       input[MAX_EM2820_INPUT];
 };

 struct em2820_eeprom {
 	u32 id;			/* 0x9567eb1a */
 	u16 vendor_ID;
 	u16 product_ID;

 	u16 chip_conf;

 	u16 board_conf;

 	u16 string1, string2, string3;

 	u8 string_idx_table;
 };

 /* device states */
 enum em2820_dev_state {
 	DEV_INITIALIZED = 0x01,
 	DEV_DISCONNECTED = 0x02,
 	DEV_MISCONFIGURED = 0x04,
 };

 /* tvnorms */
 struct em2820_tvnorm {
 	char *name;
 	v4l2_std_id id;
 	/* mode for saa7113h */
 	int mode;
 };

 /* main device struct */
 struct em2820 {
 	/* generic device properties */
 	char name[30];		/* name (including minor) of the device */
 	int model;		/* index in the device_data struct */
 	unsigned int is_em2800;
 	int video_inputs;	/* number of video inputs */
 	unsigned int has_tuner:1;
 	unsigned int has_msp34xx:1;
 	unsigned int has_tda9887:1;

 	enum em2820_decoder decoder;

 	int tuner_type;		/* type of the tuner */
 	int tuner_addr;		/* tuner address */
 	int tda9887_conf;
 	/* i2c i/o */
 	struct i2c_adapter i2c_adap;
 	struct i2c_client i2c_client;
 	/* video for linux */
 	int users;		/* user count for exclusive use */
 	struct video_device *vdev;	/* video for linux device struct */
 	struct video_picture vpic;	/* picture settings only used to init saa7113h */
 	struct em2820_tvnorm *tvnorm;	/* selected tv norm */
 	int ctl_freq;		/* selected frequency */
 	unsigned int ctl_input;	/* selected input */
 	unsigned int ctl_ainput;	/* slected audio input */
 	int mute;
 	int volume;
 	/* frame properties */
 	struct em2820_frame_t frame[EM2820_NUM_FRAMES];	/* list of frames */
 	int num_frames;		/* number of frames currently in use */
 	unsigned int frame_count;	/* total number of transfered frames */
 	struct em2820_frame_t *frame_current;	/* the frame that is being filled */
 	int width;		/* current frame width */
 	int height;		/* current frame height */
 	int frame_size;		/* current frame size */
 	int field_size;		/* current field size */
 	int bytesperline;
 	int hscale;		/* horizontal scale factor (see datasheet) */
 	int vscale;		/* vertical scale factor (see datasheet) */
 	int interlaced;		/* 1=interlace fileds, 0=just top fileds */
 	int type;

 	/* states */
 	enum em2820_dev_state state;
 	enum em2820_stream_state stream;
 	enum em2820_io_method io;
 	/* locks */
 	struct semaphore lock, fileop_lock;
 	spinlock_t queue_lock;
 	struct list_head inqueue, outqueue;
 	wait_queue_head_t open, wait_frame, wait_stream;
 	struct video_device *vbi_dev;

 	unsigned char eedata[256];

 	/* usb transfer */
 	struct usb_device *udev;	/* the usb device */
 	int alt;		/* alternate */
 	int max_pkt_size;	/* max packet size of isoc transaction */
 	unsigned int alt_max_pkt_size[EM2820_MAX_ALT + 1];	/* array of wMaxPacketSize */
 	struct urb *urb[EM2820_NUM_BUFS];	/* urb for isoc transfers */
 	char *transfer_buffer[EM2820_NUM_BUFS];	/* transfer buffers for isoc transfer */
 	/* helper funcs that call usb_control_msg */
 	int (*em2820_write_regs) (struct em2820 * dev, u16 reg, char *buf,
 				  int len);
 	int (*em2820_read_reg) (struct em2820 * dev, u16 reg);
 	int (*em2820_read_reg_req_len) (struct em2820 * dev, u8 req, u16 reg,
 					char *buf, int len);
 	int (*em2820_write_regs_req) (struct em2820 * dev, u8 req, u16 reg,
 				      char *buf, int len);
 	int (*em2820_read_reg_req) (struct em2820 * dev, u8 req, u16 reg);
 };

 /* Provided by em2820-i2c.c */

 void em2820_i2c_call_clients(struct em2820 *dev, unsigned int cmd, void *arg);
 int em2820_i2c_register(struct em2820 *dev);
 int em2820_i2c_unregister(struct em2820 *dev);

 /* Provided by em2820-input.c */

 void em2820_set_ir(struct em2820 * dev,struct IR_i2c *ir);

 /* Provided by em2820-core.c */

 void em2820_print_ioctl(char *name, unsigned int cmd);

 u32 em2820_request_buffers(struct em2820 *dev, u32 count);
 void em2820_queue_unusedframes(struct em2820 *dev);
 void em2820_release_buffers(struct em2820 *dev);

 int em2820_read_reg_req_len(struct em2820 *dev, u8 req, u16 reg,
 			    char *buf, int len);
 int em2820_read_reg_req(struct em2820 *dev, u8 req, u16 reg);
 int em2820_read_reg(struct em2820 *dev, u16 reg);
 int em2820_write_regs_req(struct em2820 *dev, u8 req, u16 reg, char *buf,
 			  int len);
 int em2820_write_regs(struct em2820 *dev, u16 reg, char *buf, int len);
 int em2820_write_reg_bits(struct em2820 *dev, u16 reg, u8 val,
 			  u8 bitmask);
 int em2820_write_ac97(struct em2820 *dev, u8 reg, u8 * val);
 int em2820_audio_analog_set(struct em2820 *dev);
 int em2820_colorlevels_set_default(struct em2820 *dev);
 int em2820_capture_start(struct em2820 *dev, int start);
 int em2820_outfmt_set_yuv422(struct em2820 *dev);
 int em2820_accumulator_set(struct em2820 *dev, u8 xmin, u8 xmax, u8 ymin,
 			   u8 ymax);
 int em2820_capture_area_set(struct em2820 *dev, u8 hstart, u8 vstart,
 			    u16 width, u16 height);
 int em2820_scaler_set(struct em2820 *dev, u16 h, u16 v);
 int em2820_resolution_set(struct em2820 *dev);
 void em2820_isocIrq(struct urb *urb, struct pt_regs *regs);
 int em2820_init_isoc(struct em2820 *dev);
 void em2820_uninit_isoc(struct em2820 *dev);
 int em2820_set_alternate(struct em2820 *dev);

 /* Provided by em2820-cards.c */
 extern int em2800_variant_detect(struct usb_device* udev,int model);
 extern void em2820_card_setup(struct em2820 *dev);
 extern struct em2820_board em2820_boards[];
 extern struct usb_device_id em2820_id_table[];
 extern const unsigned int em2820_bcount;

 /* em2820 registers */
 #define CHIPID_REG	0x0a
 #define USBSUSP_REG	0x0c	/* */

 #define AUDIOSRC_REG	0x0e
 #define XCLK_REG	0x0f

 #define VINMODE_REG	0x10
 #define VINCTRL_REG	0x11
 #define VINENABLE_REG	0x12	/* */

 #define GAMMA_REG	0x14
 #define RGAIN_REG	0x15
 #define GGAIN_REG	0x16
 #define BGAIN_REG	0x17
 #define ROFFSET_REG	0x18
 #define GOFFSET_REG	0x19
 #define BOFFSET_REG	0x1a

 #define OFLOW_REG	0x1b
 #define HSTART_REG	0x1c
 #define VSTART_REG	0x1d
 #define CWIDTH_REG	0x1e
 #define CHEIGHT_REG	0x1f

 #define YGAIN_REG	0x20
 #define YOFFSET_REG	0x21
 #define UVGAIN_REG	0x22
 #define UOFFSET_REG	0x23
 #define VOFFSET_REG	0x24
 #define SHARPNESS_REG	0x25

 #define COMPR_REG	0x26
 #define OUTFMT_REG	0x27

 #define XMIN_REG	0x28
 #define XMAX_REG	0x29
 #define YMIN_REG	0x2a
 #define YMAX_REG	0x2b

 #define HSCALELOW_REG	0x30
 #define HSCALEHIGH_REG	0x31
 #define VSCALELOW_REG	0x32
 #define VSCALEHIGH_REG	0x33

 #define AC97LSB_REG	0x40
 #define AC97MSB_REG	0x41
 #define AC97ADDR_REG	0x42
 #define AC97BUSY_REG	0x43

 /* em202 registers */
 #define MASTER_AC97	0x02
 #define VIDEO_AC97	0x14

 /* register settings */
 #define EM2820_AUDIO_SRC_TUNER	0xc0
 #define EM2820_AUDIO_SRC_LINE	0x80

 /* printk macros */

 #define em2820_err(fmt, arg...) do {\
 	printk(KERN_ERR fmt , ##arg); } while (0)

 #define em2820_errdev(fmt, arg...) do {\
 	printk(KERN_ERR "%s: "fmt,\
 			dev->name , ##arg); } while (0)

 #define em2820_info(fmt, arg...) do {\
 	printk(KERN_INFO "%s: "fmt,\
 			dev->name , ##arg); } while (0)
 #define em2820_warn(fmt, arg...) do {\
 	printk(KERN_WARNING "%s: "fmt,\
 			dev->name , ##arg); } while (0)

 inline static int em2820_audio_source(struct em2820 *dev, int input)
 {
 	return em2820_write_reg_bits(dev, AUDIOSRC_REG, input, 0xc0);
 }

 inline static int em2820_audio_usb_mute(struct em2820 *dev, int mute)
 {
 	return em2820_write_reg_bits(dev, XCLK_REG, mute ? 0x00 : 0x80, 0x80);
 }

 inline static int em2820_audio_analog_setup(struct em2820 *dev)
 {
 	/* unmute video mixer with default volume level */
 	return em2820_write_ac97(dev, VIDEO_AC97, "\x08\x08");
 }

 inline static int em2820_compression_disable(struct em2820 *dev)
 {
 	/* side effect of disabling scaler and mixer */
 	return em2820_write_regs(dev, COMPR_REG, "\x00", 1);
 }

 inline static int em2820_contrast_get(struct em2820 *dev)
 {
 	return em2820_read_reg(dev, YGAIN_REG) & 0x1f;
 }

 inline static int em2820_brightness_get(struct em2820 *dev)
 {
 	return em2820_read_reg(dev, YOFFSET_REG);
 }

 inline static int em2820_saturation_get(struct em2820 *dev)
 {
 	return em2820_read_reg(dev, UVGAIN_REG) & 0x1f;
 }

 inline static int em2820_u_balance_get(struct em2820 *dev)
 {
 	return em2820_read_reg(dev, UOFFSET_REG);
 }

 inline static int em2820_v_balance_get(struct em2820 *dev)
 {
 	return em2820_read_reg(dev, VOFFSET_REG);
 }

 inline static int em2820_gamma_get(struct em2820 *dev)
 {
 	return em2820_read_reg(dev, GAMMA_REG) & 0x3f;
 }

 inline static int em2820_contrast_set(struct em2820 *dev, s32 val)
 {
 	u8 tmp = (u8) val;
 	return em2820_write_regs(dev, YGAIN_REG, &tmp, 1);
 }

 inline static int em2820_brightness_set(struct em2820 *dev, s32 val)
 {
 	u8 tmp = (u8) val;
 	return em2820_write_regs(dev, YOFFSET_REG, &tmp, 1);
 }

 inline static int em2820_saturation_set(struct em2820 *dev, s32 val)
 {
 	u8 tmp = (u8) val;
 	return em2820_write_regs(dev, UVGAIN_REG, &tmp, 1);
 }

 inline static int em2820_u_balance_set(struct em2820 *dev, s32 val)
 {
 	u8 tmp = (u8) val;
 	return em2820_write_regs(dev, UOFFSET_REG, &tmp, 1);
 }

 inline static int em2820_v_balance_set(struct em2820 *dev, s32 val)
 {
 	u8 tmp = (u8) val;
 	return em2820_write_regs(dev, VOFFSET_REG, &tmp, 1);
 }

 inline static int em2820_gamma_set(struct em2820 *dev, s32 val)
 {
 	u8 tmp = (u8) val;
 	return em2820_write_regs(dev, GAMMA_REG, &tmp, 1);
 }

 /*FIXME: maxw should be dependent of alt mode */
 #define norm_maxw(dev) 720
 inline static unsigned int norm_maxh(struct em2820 *dev)
 {
 	return (dev->tvnorm->id & V4L2_STD_625_50) ? 576 : 480;
 }

 #endif
	/*
	em2820-cards.c - driver for Empia EM2800/EM2820/2840 USB video capture devices

	Copyright (C) 2005 Markus Rechberger <mrechberger@gmail.com>
	Ludovico Cavedon <cavedon@sssup.it>
	Mauro Carvalho Chehab <mchehab@brturbo.com.br>

	Based on the em2800 driver from Sascha Sommer <saschasommer@freenet.de>

	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.

	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., 675 Mass Ave, Cambridge, MA 02139, USA.
	*/

	#ifndef _EM2820_H
	#define _EM2820_H

	#include <linux/videodev.h>
	#include <linux/i2c.h>
	#include <media/ir-kbd-i2c.h>

	/* Boards supported by driver */

	#define EM2800_BOARD_UNKNOWN 0
	#define EM2820_BOARD_UNKNOWN 1
	#define EM2820_BOARD_TERRATEC_CINERGY_250 2
	#define EM2820_BOARD_PINNACLE_USB_2 3
	#define EM2820_BOARD_HAUPPAUGE_WINTV_USB_2 4
	#define EM2820_BOARD_MSI_VOX_USB_2 5
	#define EM2800_BOARD_TERRATEC_CINERGY_200 6
	#define EM2800_BOARD_LEADTEK_WINFAST_USBII 7
	#define EM2800_BOARD_KWORLD_USB2800 8

	#define UNSET -1

	/* maximum number of em28xx boards */
	#define EM2820_MAXBOARDS 1 /FIXME: should be bigger /

	/* maximum number of frames that can be queued */
	#define EM2820_NUM_FRAMES 5
	/* number of frames that get used for v4l2_read() */
	#define EM2820_NUM_READ_FRAMES 2

	/* number of buffers for isoc transfers */
	#define EM2820_NUM_BUFS 5

	/* number of packets for each buffer
	windows requests only 40 packets .. so we better do the same
	this is what I found out for all alternate numbers there!
	*/
	#define EM2820_NUM_PACKETS 40

	/* default alternate; 0 means choose the best */
	#define EM2820_PINOUT 0
	#define EM2820_MAX_ALT 7

	#define EM2820_INTERLACED_DEFAULT 1

	/*
	#define (use usbview if you want to get the other alternate number infos)
	#define
	#define alternate number 2
	#define Endpoint Address: 82
	Direction: in
	Attribute: 1
	Type: Isoc
	Max Packet Size: 1448
	Interval: 125us

	alternate number 7

	Endpoint Address: 82
	Direction: in
	Attribute: 1
	Type: Isoc
	Max Packet Size: 3072
	Interval: 125us
	*/

	/* time to wait when stopping the isoc transfer */
	#define EM2820_URB_TIMEOUT msecs_to_jiffies(EM2820_NUM_BUFS * EM2820_NUM_PACKETS)

	/* time in msecs to wait for i2c writes to finish */
	#define EM2800_I2C_WRITE_TIMEOUT 20

	/* the various frame states */
	enum em2820_frame_state {
	F_UNUSED = 0,
	F_QUEUED,
	F_GRABBING,
	F_DONE,
	F_ERROR,
	};

	/* stream states */
	enum em2820_stream_state {
	STREAM_OFF,
	STREAM_INTERRUPT,
	STREAM_ON,
	};

	/* frames */
	struct em2820_frame_t {
	void *bufmem;
	struct v4l2_buffer buf;
	enum em2820_frame_state state;
	struct list_head frame;
	unsigned long vma_use_count;
	int top_field;
	int fieldbytesused;
	};

	/* io methods */
	enum em2820_io_method {
	IO_NONE,
	IO_READ,
	IO_MMAP,
	};

	/* inputs */

	#define MAX_EM2820_INPUT 4
	enum enum2820_itype {
	EM2820_VMUX_COMPOSITE1 = 1,
	EM2820_VMUX_COMPOSITE2,
	EM2820_VMUX_COMPOSITE3,
	EM2820_VMUX_COMPOSITE4,
	EM2820_VMUX_SVIDEO,
	EM2820_VMUX_TELEVISION,
	EM2820_VMUX_CABLE,
	EM2820_VMUX_DVB,
	EM2820_VMUX_DEBUG,
	EM2820_RADIO,
	};

	struct em2820_input {
	enum enum2820_itype type;
	unsigned int vmux;
	unsigned int amux;
	};

	#define INPUT(nr) (&em2820_boards[dev->model].input[nr])

	enum em2820_decoder {
	EM2820_TVP5150,
	EM2820_SAA7113,
	EM2820_SAA7114
	};

	struct em2820_board {
	char *name;
	int vchannels;
	int norm;
	int tuner_type;

	/* i2c flags */
	unsigned int is_em2800;
	unsigned int tda9887_conf;

	unsigned int has_tuner:1;
	unsigned int has_msp34xx:1;

	enum em2820_decoder decoder;

	struct em2820_input input[MAX_EM2820_INPUT];
	};

	struct em2820_eeprom {
	u32 id; /* 0x9567eb1a */
	u16 vendor_ID;
	u16 product_ID;

	u16 chip_conf;

	u16 board_conf;

	u16 string1, string2, string3;

	u8 string_idx_table;
	};

	/* device states */
	enum em2820_dev_state {
	DEV_INITIALIZED = 0x01,
	DEV_DISCONNECTED = 0x02,
	DEV_MISCONFIGURED = 0x04,
	};

	/* tvnorms */
	struct em2820_tvnorm {
	char *name;
	v4l2_std_id id;
	/* mode for saa7113h */
	int mode;
	};

	/* main device struct */
	struct em2820 {
	/* generic device properties */
	char name[30]; /* name (including minor) of the device */
	int model; /* index in the device_data struct */
	unsigned int is_em2800;
	int video_inputs; /* number of video inputs */
	unsigned int has_tuner:1;
	unsigned int has_msp34xx:1;
	unsigned int has_tda9887:1;

	enum em2820_decoder decoder;

	int tuner_type; /* type of the tuner */
	int tuner_addr; /* tuner address */
	int tda9887_conf;
	/* i2c i/o */
	struct i2c_adapter i2c_adap;
	struct i2c_client i2c_client;
	/* video for linux */
	int users; /* user count for exclusive use */
	struct video_device vdev; / video for linux device struct */
	struct video_picture vpic; /* picture settings only used to init saa7113h */
	struct em2820_tvnorm tvnorm; / selected tv norm */
	int ctl_freq; /* selected frequency */
	unsigned int ctl_input; /* selected input */
	unsigned int ctl_ainput; /* slected audio input */
	int mute;
	int volume;
	/* frame properties */
	struct em2820_frame_t frame[EM2820_NUM_FRAMES]; /* list of frames */
	int num_frames; /* number of frames currently in use */
	unsigned int frame_count; /* total number of transfered frames */
	struct em2820_frame_t frame_current; / the frame that is being filled */
	int width; /* current frame width */
	int height; /* current frame height */
	int frame_size; /* current frame size */
	int field_size; /* current field size */
	int bytesperline;
	int hscale; /* horizontal scale factor (see datasheet) */
	int vscale; /* vertical scale factor (see datasheet) */
	int interlaced; /* 1=interlace fileds, 0=just top fileds */
	int type;

	/* states */
	enum em2820_dev_state state;
	enum em2820_stream_state stream;
	enum em2820_io_method io;
	/* locks */
	struct semaphore lock, fileop_lock;
	spinlock_t queue_lock;
	struct list_head inqueue, outqueue;
	wait_queue_head_t open, wait_frame, wait_stream;
	struct video_device *vbi_dev;

	unsigned char eedata[256];

	/* usb transfer */
	struct usb_device udev; / the usb device */
	int alt; /* alternate */
	int max_pkt_size; /* max packet size of isoc transaction */
	unsigned int alt_max_pkt_size[EM2820_MAX_ALT + 1]; /* array of wMaxPacketSize */
	struct urb urb[EM2820_NUM_BUFS]; / urb for isoc transfers */
	char transfer_buffer[EM2820_NUM_BUFS]; / transfer buffers for isoc transfer */
	/* helper funcs that call usb_control_msg */
	int (em2820_write_regs) (struct em2820 dev, u16 reg, char *buf,
	int len);
	int (em2820_read_reg) (struct em2820 dev, u16 reg);
	int (em2820_read_reg_req_len) (struct em2820 dev, u8 req, u16 reg,
	char *buf, int len);
	int (em2820_write_regs_req) (struct em2820 dev, u8 req, u16 reg,
	char *buf, int len);
	int (em2820_read_reg_req) (struct em2820 dev, u8 req, u16 reg);
	};

	/* Provided by em2820-i2c.c */

	void em2820_i2c_call_clients(struct em2820 dev, unsigned int cmd, void arg);
	int em2820_i2c_register(struct em2820 *dev);
	int em2820_i2c_unregister(struct em2820 *dev);

	/* Provided by em2820-input.c */

	void em2820_set_ir(struct em2820 * dev,struct IR_i2c *ir);

	/* Provided by em2820-core.c */

	void em2820_print_ioctl(char *name, unsigned int cmd);

	u32 em2820_request_buffers(struct em2820 *dev, u32 count);
	void em2820_queue_unusedframes(struct em2820 *dev);
	void em2820_release_buffers(struct em2820 *dev);

	int em2820_read_reg_req_len(struct em2820 *dev, u8 req, u16 reg,
	char *buf, int len);
	int em2820_read_reg_req(struct em2820 *dev, u8 req, u16 reg);
	int em2820_read_reg(struct em2820 *dev, u16 reg);
	int em2820_write_regs_req(struct em2820 dev, u8 req, u16 reg, char buf,
	int len);
	int em2820_write_regs(struct em2820 dev, u16 reg, char buf, int len);
	int em2820_write_reg_bits(struct em2820 *dev, u16 reg, u8 val,
	u8 bitmask);
	int em2820_write_ac97(struct em2820 dev, u8 reg, u8 val);
	int em2820_audio_analog_set(struct em2820 *dev);
	int em2820_colorlevels_set_default(struct em2820 *dev);
	int em2820_capture_start(struct em2820 *dev, int start);
	int em2820_outfmt_set_yuv422(struct em2820 *dev);
	int em2820_accumulator_set(struct em2820 *dev, u8 xmin, u8 xmax, u8 ymin,
	u8 ymax);
	int em2820_capture_area_set(struct em2820 *dev, u8 hstart, u8 vstart,
	u16 width, u16 height);
	int em2820_scaler_set(struct em2820 *dev, u16 h, u16 v);
	int em2820_resolution_set(struct em2820 *dev);
	void em2820_isocIrq(struct urb urb, struct pt_regs regs);
	int em2820_init_isoc(struct em2820 *dev);
	void em2820_uninit_isoc(struct em2820 *dev);
	int em2820_set_alternate(struct em2820 *dev);

	/* Provided by em2820-cards.c */
	extern int em2800_variant_detect(struct usb_device* udev,int model);
	extern void em2820_card_setup(struct em2820 *dev);
	extern struct em2820_board em2820_boards[];
	extern struct usb_device_id em2820_id_table[];
	extern const unsigned int em2820_bcount;

	/* em2820 registers */
	#define CHIPID_REG 0x0a
	#define USBSUSP_REG 0x0c /* */

	#define AUDIOSRC_REG 0x0e
	#define XCLK_REG 0x0f

	#define VINMODE_REG 0x10
	#define VINCTRL_REG 0x11
	#define VINENABLE_REG 0x12 /* */

	#define GAMMA_REG 0x14
	#define RGAIN_REG 0x15
	#define GGAIN_REG 0x16
	#define BGAIN_REG 0x17
	#define ROFFSET_REG 0x18
	#define GOFFSET_REG 0x19
	#define BOFFSET_REG 0x1a

	#define OFLOW_REG 0x1b
	#define HSTART_REG 0x1c
	#define VSTART_REG 0x1d
	#define CWIDTH_REG 0x1e
	#define CHEIGHT_REG 0x1f

	#define YGAIN_REG 0x20
	#define YOFFSET_REG 0x21
	#define UVGAIN_REG 0x22
	#define UOFFSET_REG 0x23
	#define VOFFSET_REG 0x24
	#define SHARPNESS_REG 0x25

	#define COMPR_REG 0x26
	#define OUTFMT_REG 0x27

	#define XMIN_REG 0x28
	#define XMAX_REG 0x29
	#define YMIN_REG 0x2a
	#define YMAX_REG 0x2b

	#define HSCALELOW_REG 0x30
	#define HSCALEHIGH_REG 0x31
	#define VSCALELOW_REG 0x32
	#define VSCALEHIGH_REG 0x33

	#define AC97LSB_REG 0x40
	#define AC97MSB_REG 0x41
	#define AC97ADDR_REG 0x42
	#define AC97BUSY_REG 0x43

	/* em202 registers */
	#define MASTER_AC97 0x02
	#define VIDEO_AC97 0x14

	/* register settings */
	#define EM2820_AUDIO_SRC_TUNER 0xc0
	#define EM2820_AUDIO_SRC_LINE 0x80

	/* printk macros */

	#define em2820_err(fmt, arg...) do {\
	printk(KERN_ERR fmt , ##arg); } while (0)

	#define em2820_errdev(fmt, arg...) do {\
	printk(KERN_ERR "%s: "fmt,\
	dev->name , ##arg); } while (0)

	#define em2820_info(fmt, arg...) do {\
	printk(KERN_INFO "%s: "fmt,\
	dev->name , ##arg); } while (0)
	#define em2820_warn(fmt, arg...) do {\
	printk(KERN_WARNING "%s: "fmt,\
	dev->name , ##arg); } while (0)

	inline static int em2820_audio_source(struct em2820 *dev, int input)
	{
	return em2820_write_reg_bits(dev, AUDIOSRC_REG, input, 0xc0);
	}

	inline static int em2820_audio_usb_mute(struct em2820 *dev, int mute)
	{
	return em2820_write_reg_bits(dev, XCLK_REG, mute ? 0x00 : 0x80, 0x80);
	}

	inline static int em2820_audio_analog_setup(struct em2820 *dev)
	{
	/* unmute video mixer with default volume level */
	return em2820_write_ac97(dev, VIDEO_AC97, "\x08\x08");
	}

	inline static int em2820_compression_disable(struct em2820 *dev)
	{
	/* side effect of disabling scaler and mixer */
	return em2820_write_regs(dev, COMPR_REG, "\x00", 1);
	}

	inline static int em2820_contrast_get(struct em2820 *dev)
	{
	return em2820_read_reg(dev, YGAIN_REG) & 0x1f;
	}

	inline static int em2820_brightness_get(struct em2820 *dev)
	{
	return em2820_read_reg(dev, YOFFSET_REG);
	}

	inline static int em2820_saturation_get(struct em2820 *dev)
	{
	return em2820_read_reg(dev, UVGAIN_REG) & 0x1f;
	}

	inline static int em2820_u_balance_get(struct em2820 *dev)
	{
	return em2820_read_reg(dev, UOFFSET_REG);
	}

	inline static int em2820_v_balance_get(struct em2820 *dev)
	{
	return em2820_read_reg(dev, VOFFSET_REG);
	}

	inline static int em2820_gamma_get(struct em2820 *dev)
	{
	return em2820_read_reg(dev, GAMMA_REG) & 0x3f;
	}

	inline static int em2820_contrast_set(struct em2820 *dev, s32 val)
	{
	u8 tmp = (u8) val;
	return em2820_write_regs(dev, YGAIN_REG, &tmp, 1);
	}

	inline static int em2820_brightness_set(struct em2820 *dev, s32 val)
	{
	u8 tmp = (u8) val;
	return em2820_write_regs(dev, YOFFSET_REG, &tmp, 1);
	}

	inline static int em2820_saturation_set(struct em2820 *dev, s32 val)
	{
	u8 tmp = (u8) val;
	return em2820_write_regs(dev, UVGAIN_REG, &tmp, 1);
	}

	inline static int em2820_u_balance_set(struct em2820 *dev, s32 val)
	{
	u8 tmp = (u8) val;
	return em2820_write_regs(dev, UOFFSET_REG, &tmp, 1);
	}

	inline static int em2820_v_balance_set(struct em2820 *dev, s32 val)
	{
	u8 tmp = (u8) val;
	return em2820_write_regs(dev, VOFFSET_REG, &tmp, 1);
	}

	inline static int em2820_gamma_set(struct em2820 *dev, s32 val)
	{
	u8 tmp = (u8) val;
	return em2820_write_regs(dev, GAMMA_REG, &tmp, 1);
	}

	/FIXME: maxw should be dependent of alt mode /
	#define norm_maxw(dev) 720
	inline static unsigned int norm_maxh(struct em2820 *dev)
	{
	return (dev->tvnorm->id & V4L2_STD_625_50) ? 576 : 480;
	}

	#endif