/*
   em28xx.h - 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@infradead.org>

   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 _EM28XX_H
#define _EM28XX_H

#include <linux/videodev2.h>
#include <media/videobuf-vmalloc.h>

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

/* maximum number of em28xx boards */
#define EM28XX_MAXBOARDS 4 /*FIXME: should be bigger */

/* maximum number of frames that can be queued */
#define EM28XX_NUM_FRAMES 5
/* number of frames that get used for v4l2_read() */
#define EM28XX_NUM_READ_FRAMES 2

/* number of buffers for isoc transfers */
#define EM28XX_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 EM28XX_NUM_PACKETS 40

/* default alternate; 0 means choose the best */
#define EM28XX_PINOUT 0

#define EM28XX_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 EM28XX_URB_TIMEOUT       msecs_to_jiffies(EM28XX_NUM_BUFS * EM28XX_NUM_PACKETS)

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

enum em28xx_stream_state {
	STREAM_OFF,
	STREAM_INTERRUPT,
	STREAM_ON,
};

struct em28xx_usb_isoc_ctl {
		/* max packet size of isoc transaction */
	int				max_pkt_size;

		/* number of allocated urbs */
	int				num_bufs;

		/* urb for isoc transfers */
	struct urb			**urb;

		/* transfer buffers for isoc transfer */
	char				**transfer_buffer;

		/* Last buffer command and region */
	u8				cmd;
	int				pos, size, pktsize;

		/* Last field: ODD or EVEN? */
	int				field;

		/* Stores incomplete commands */
	u32				tmp_buf;
	int				tmp_buf_len;

		/* Stores already requested buffers */
	struct em28xx_buffer    	*buf;

		/* Store last filled frame */
	int				last_field;

		/* Stores the number of received fields */
	int				nfields;
};

struct em28xx_fmt {
	char  *name;
	u32   fourcc;          /* v4l2 format id */
};

/* buffer for one video frame */
struct em28xx_buffer {
	/* common v4l buffer stuff -- must be first */
	struct videobuf_buffer vb;

	struct em28xx_fmt *fmt;

	struct list_head frame;
	int top_field;
	int receiving;
};

struct em28xx_dmaqueue {
	struct list_head       active;
	struct list_head       queued;

	wait_queue_head_t          wq;

	/* Counters to control buffer fill */
	int                        pos;
};

/* io methods */
enum em28xx_io_method {
	IO_NONE,
	IO_READ,
	IO_MMAP,
};

/* inputs */

#define MAX_EM28XX_INPUT 4
enum enum28xx_itype {
	EM28XX_VMUX_COMPOSITE1 = 1,
	EM28XX_VMUX_COMPOSITE2,
	EM28XX_VMUX_COMPOSITE3,
	EM28XX_VMUX_COMPOSITE4,
	EM28XX_VMUX_SVIDEO,
	EM28XX_VMUX_TELEVISION,
	EM28XX_VMUX_CABLE,
	EM28XX_VMUX_DVB,
	EM28XX_VMUX_DEBUG,
	EM28XX_RADIO,
};

enum em28xx_amux {
	EM28XX_AMUX_VIDEO,
	EM28XX_AMUX_LINE_IN,
	EM28XX_AMUX_AC97_VIDEO,
	EM28XX_AMUX_AC97_LINE_IN,
};

struct em28xx_input {
	enum enum28xx_itype type;
	unsigned int vmux;
	enum em28xx_amux amux;
};

#define INPUT(nr) (&em28xx_boards[dev->model].input[nr])

enum em28xx_decoder {
	EM28XX_TVP5150,
	EM28XX_SAA7113,
	EM28XX_SAA7114
};

struct em28xx_board {
	char *name;
	int vchannels;
	int tuner_type;

	/* i2c flags */
	unsigned int tda9887_conf;

	unsigned int is_em2800:1;
	unsigned int has_msp34xx:1;
	unsigned int mts_firmware:1;
	unsigned int has_12mhz_i2s:1;
	unsigned int max_range_640_480:1;

	unsigned int analog_gpio;

	enum em28xx_decoder decoder;

	struct em28xx_input       input[MAX_EM28XX_INPUT];
	struct em28xx_input	  radio;
};

struct em28xx_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 em28xx_dev_state {
	DEV_INITIALIZED = 0x01,
	DEV_DISCONNECTED = 0x02,
	DEV_MISCONFIGURED = 0x04,
};

#define EM28XX_AUDIO_BUFS 5
#define EM28XX_NUM_AUDIO_PACKETS 64
#define EM28XX_AUDIO_MAX_PACKET_SIZE 196 /* static value */
#define EM28XX_CAPTURE_STREAM_EN 1
#define EM28XX_AUDIO   0x10

struct em28xx_audio {
	char name[50];
	char *transfer_buffer[EM28XX_AUDIO_BUFS];
	struct urb *urb[EM28XX_AUDIO_BUFS];
	struct usb_device *udev;
	unsigned int capture_transfer_done;
	struct snd_pcm_substream   *capture_pcm_substream;

	unsigned int hwptr_done_capture;
	struct snd_card            *sndcard;

	int users, shutdown;
	enum em28xx_stream_state capture_stream;
	spinlock_t slock;
};

/* main device struct */
struct em28xx {
	/* generic device properties */
	char name[30];		/* name (including minor) of the device */
	int model;		/* index in the device_data struct */
	int devno;		/* marks the number of this device */
	unsigned int analog_gpio;
	unsigned int is_em2800:1;
	unsigned int has_msp34xx:1;
	unsigned int has_tda9887:1;
	unsigned int stream_on:1;	/* Locks streams */
	unsigned int has_audio_class:1;
	unsigned int has_12mhz_i2s:1;
	unsigned int max_range_640_480:1;

	int video_inputs;	/* number of video inputs */
	struct list_head	devlist;

	u32 i2s_speed;		/* I2S speed for audio digital stream */

	enum em28xx_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 */
	v4l2_std_id norm;	/* 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 */
	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 */
	unsigned int video_bytesread;	/* Number of bytes read */

	unsigned long hash;	/* eeprom hash - for boards with generic ID */
	unsigned long i2c_hash;	/* i2c devicelist hash - for boards with generic ID */

	struct em28xx_audio *adev;

	/* states */
	enum em28xx_dev_state state;
	enum em28xx_io_method io;

	struct work_struct         request_module_wk;

	/* locks */
	struct mutex lock;
	/* spinlock_t queue_lock; */
	struct list_head inqueue, outqueue;
	wait_queue_head_t open, wait_frame, wait_stream;
	struct video_device *vbi_dev;
	struct video_device *radio_dev;

	unsigned char eedata[256];

	/* Isoc control struct */
	struct em28xx_dmaqueue vidq;
	struct em28xx_usb_isoc_ctl isoc_ctl;
	spinlock_t slock;

	/* usb transfer */
	struct usb_device *udev;	/* the usb device */
	int alt;		/* alternate */
	int max_pkt_size;	/* max packet size of isoc transaction */
	int num_alt;		/* Number of alternative settings */
	unsigned int *alt_max_pkt_size;	/* array of wMaxPacketSize */
	struct urb *urb[EM28XX_NUM_BUFS];	/* urb for isoc transfers */
	char *transfer_buffer[EM28XX_NUM_BUFS];	/* transfer buffers for isoc transfer */
	/* helper funcs that call usb_control_msg */
	int (*em28xx_write_regs) (struct em28xx * dev, u16 reg, char *buf,
				  int len);
	int (*em28xx_read_reg) (struct em28xx * dev, u16 reg);
	int (*em28xx_read_reg_req_len) (struct em28xx * dev, u8 req, u16 reg,
					char *buf, int len);
	int (*em28xx_write_regs_req) (struct em28xx * dev, u8 req, u16 reg,
				      char *buf, int len);
	int (*em28xx_read_reg_req) (struct em28xx * dev, u8 req, u16 reg);
};

struct em28xx_fh {
	struct em28xx *dev;
	unsigned int  stream_on:1;	/* Locks streams */
	int           radio;

	unsigned int                 width, height;
	struct videobuf_queue        vb_vidq;
	struct em28xx_fmt            *fmt;

	enum v4l2_buf_type           type;
};

struct em28xx_ops {
	struct list_head next;
	char *name;
	int id;
	int (*init)(struct em28xx *);
	int (*fini)(struct em28xx *);
};

/* Provided by em28xx-i2c.c */

void em28xx_i2c_call_clients(struct em28xx *dev, unsigned int cmd, void *arg);
void em28xx_do_i2c_scan(struct em28xx *dev);
int em28xx_i2c_register(struct em28xx *dev);
int em28xx_i2c_unregister(struct em28xx *dev);

/* Provided by em28xx-core.c */

u32 em28xx_request_buffers(struct em28xx *dev, u32 count);
void em28xx_queue_unusedframes(struct em28xx *dev);
void em28xx_release_buffers(struct em28xx *dev);

int em28xx_read_reg_req_len(struct em28xx *dev, u8 req, u16 reg,
			    char *buf, int len);
int em28xx_read_reg_req(struct em28xx *dev, u8 req, u16 reg);
int em28xx_read_reg(struct em28xx *dev, u16 reg);
int em28xx_write_regs_req(struct em28xx *dev, u8 req, u16 reg, char *buf,
			  int len);
int em28xx_write_regs(struct em28xx *dev, u16 reg, char *buf, int len);
int em28xx_audio_analog_set(struct em28xx *dev);

int em28xx_colorlevels_set_default(struct em28xx *dev);
int em28xx_capture_start(struct em28xx *dev, int start);
int em28xx_outfmt_set_yuv422(struct em28xx *dev);
int em28xx_resolution_set(struct em28xx *dev);
int em28xx_set_alternate(struct em28xx *dev);

/* Provided by em28xx-video.c */
int em28xx_register_extension(struct em28xx_ops *dev);
void em28xx_unregister_extension(struct em28xx_ops *dev);

/* Provided by em28xx-cards.c */
extern int em2800_variant_detect(struct usb_device* udev,int model);
extern void em28xx_pre_card_setup(struct em28xx *dev);
extern void em28xx_card_setup(struct em28xx *dev);
extern struct em28xx_board em28xx_boards[];
extern struct usb_device_id em28xx_id_table[];
extern const unsigned int em28xx_bcount;
void em28xx_set_ir(struct em28xx *dev, struct IR_i2c *ir);

/* Provided by em28xx-input.c */
/* TODO: Check if the standard get_key handlers on ir-common can be used */
int em28xx_get_key_terratec(struct IR_i2c *ir, u32 *ir_key, u32 *ir_raw);
int em28xx_get_key_em_haup(struct IR_i2c *ir, u32 *ir_key, u32 *ir_raw);
int em28xx_get_key_pinnacle_usb_grey(struct IR_i2c *ir, u32 *ir_key,
				     u32 *ir_raw);

/* em2800 registers */
#define EM2800_AUDIOSRC_REG 0x08

/* em28xx registers */
#define I2C_CLK_REG	0x06
#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 LINE_IN_AC97    0x10
#define VIDEO_AC97	0x14

/* register settings */
#define EM2800_AUDIO_SRC_TUNER  0x0d
#define EM2800_AUDIO_SRC_LINE   0x0c
#define EM28XX_AUDIO_SRC_TUNER	0xc0
#define EM28XX_AUDIO_SRC_LINE	0x80

/* printk macros */

#define em28xx_err(fmt, arg...) do {\
	printk(KERN_ERR fmt , ##arg); } while (0)

#define em28xx_errdev(fmt, arg...) do {\
	printk(KERN_ERR "%s: "fmt,\
			dev->name , ##arg); } while (0)

#define em28xx_info(fmt, arg...) do {\
	printk(KERN_INFO "%s: "fmt,\
			dev->name , ##arg); } while (0)
#define em28xx_warn(fmt, arg...) do {\
	printk(KERN_WARNING "%s: "fmt,\
			dev->name , ##arg); } while (0)

inline static int em28xx_compression_disable(struct em28xx *dev)
{
	/* side effect of disabling scaler and mixer */
	return em28xx_write_regs(dev, COMPR_REG, "\x00", 1);
}

inline static int em28xx_contrast_get(struct em28xx *dev)
{
	return em28xx_read_reg(dev, YGAIN_REG) & 0x1f;
}

inline static int em28xx_brightness_get(struct em28xx *dev)
{
	return em28xx_read_reg(dev, YOFFSET_REG);
}

inline static int em28xx_saturation_get(struct em28xx *dev)
{
	return em28xx_read_reg(dev, UVGAIN_REG) & 0x1f;
}

inline static int em28xx_u_balance_get(struct em28xx *dev)
{
	return em28xx_read_reg(dev, UOFFSET_REG);
}

inline static int em28xx_v_balance_get(struct em28xx *dev)
{
	return em28xx_read_reg(dev, VOFFSET_REG);
}

inline static int em28xx_gamma_get(struct em28xx *dev)
{
	return em28xx_read_reg(dev, GAMMA_REG) & 0x3f;
}

inline static int em28xx_contrast_set(struct em28xx *dev, s32 val)
{
	u8 tmp = (u8) val;
	return em28xx_write_regs(dev, YGAIN_REG, &tmp, 1);
}

inline static int em28xx_brightness_set(struct em28xx *dev, s32 val)
{
	u8 tmp = (u8) val;
	return em28xx_write_regs(dev, YOFFSET_REG, &tmp, 1);
}

inline static int em28xx_saturation_set(struct em28xx *dev, s32 val)
{
	u8 tmp = (u8) val;
	return em28xx_write_regs(dev, UVGAIN_REG, &tmp, 1);
}

inline static int em28xx_u_balance_set(struct em28xx *dev, s32 val)
{
	u8 tmp = (u8) val;
	return em28xx_write_regs(dev, UOFFSET_REG, &tmp, 1);
}

inline static int em28xx_v_balance_set(struct em28xx *dev, s32 val)
{
	u8 tmp = (u8) val;
	return em28xx_write_regs(dev, VOFFSET_REG, &tmp, 1);
}

inline static int em28xx_gamma_set(struct em28xx *dev, s32 val)
{
	u8 tmp = (u8) val;
	return em28xx_write_regs(dev, GAMMA_REG, &tmp, 1);
}

/*FIXME: maxw should be dependent of alt mode */
inline static unsigned int norm_maxw(struct em28xx *dev)
{
	if (dev->max_range_640_480)
		return 640;
	else
		return 720;
}

inline static unsigned int norm_maxh(struct em28xx *dev)
{
	if (dev->max_range_640_480)
		return 480;
	else
		return (dev->norm & V4L2_STD_625_50) ? 576 : 480;
}
#endif