cregit-Linux how code gets into the kernel

Release 4.7 drivers/media/usb/au0828/au0828.h

/*
 *  Driver for the Auvitek AU0828 USB bridge
 *
 *  Copyright (c) 2008 Steven Toth <stoth@linuxtv.org>
 *
 *  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.
 */


#define pr_fmt(fmt) KBUILD_MODNAME ": " fmt

#include <linux/bitops.h>
#include <linux/usb.h>
#include <linux/i2c.h>
#include <linux/i2c-algo-bit.h>
#include <media/tveeprom.h>

/* Analog */
#include <linux/videodev2.h>
#include <media/videobuf2-v4l2.h>
#include <media/videobuf2-vmalloc.h>
#include <media/v4l2-device.h>
#include <media/v4l2-ctrls.h>
#include <media/v4l2-fh.h>
#include <media/media-device.h>

/* DVB */
#include "demux.h"
#include "dmxdev.h"
#include "dvb_demux.h"
#include "dvb_frontend.h"
#include "dvb_net.h"
#include "dvbdev.h"

#include "au0828-reg.h"
#include "au0828-cards.h"


#define URB_COUNT   16

#define URB_BUFSIZE (0xe522)

/* Analog constants */

#define NTSC_STD_W      720

#define NTSC_STD_H      480


#define AU0828_INTERLACED_DEFAULT       1

/* Defination for AU0828 USB transfer */

#define AU0828_MAX_ISO_BUFS    12  
/* maybe resize this value in the future */

#define AU0828_ISO_PACKETS_PER_URB      128


#define AU0828_MIN_BUF 4

#define AU0828_DEF_BUF 8


#define AU0828_MAX_INPUT        4

/* au0828 resource types (used for res_get/res_lock etc */

#define AU0828_RESOURCE_VIDEO 0x01

#define AU0828_RESOURCE_VBI   0x02


enum au0828_itype {
	
AU0828_VMUX_UNDEFINED = 0,
	
AU0828_VMUX_COMPOSITE,
	
AU0828_VMUX_SVIDEO,
	
AU0828_VMUX_CABLE,
	
AU0828_VMUX_TELEVISION,
	
AU0828_VMUX_DVB,
};


struct au0828_input {
	
enum au0828_itype type;
	
unsigned int vmux;
	
unsigned int amux;
	
void (*audio_setup) (void *priv, int enable);
};


struct au0828_board {
	
char *name;
	
unsigned int tuner_type;
	
unsigned char tuner_addr;
	
unsigned char i2c_clk_divider;
	
unsigned char has_ir_i2c:1;
	
unsigned char has_analog:1;
	
struct au0828_input input[AU0828_MAX_INPUT];
};


struct au0828_dvb {
	
struct mutex lock;
	
struct dvb_adapter adapter;
	
struct dvb_frontend *frontend;
	
struct dvb_demux demux;
	
struct dmxdev dmxdev;
	
struct dmx_frontend fe_hw;
	
struct dmx_frontend fe_mem;
	
struct dvb_net net;
	
int feeding;
	
int start_count;
	
int stop_count;

	
int (*set_frontend)(struct dvb_frontend *fe);
};


enum au0828_stream_state {
	
STREAM_OFF,
	
STREAM_INTERRUPT,
	
STREAM_ON
};


#define AUVI_INPUT(nr) (dev->board.input[nr])

/* device state */

enum au0828_dev_state {
	
DEV_INITIALIZED = 0,
	
DEV_DISCONNECTED = 1,
	
DEV_MISCONFIGURED = 2
};

struct au0828_dev;


struct au0828_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 au0828_buffer		*buf;
	
struct au0828_buffer		*vbi_buf;

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

		/* isoc urb callback */
	
int (*isoc_copy) (struct au0828_dev *dev, struct urb *urb);

};

/* buffer for one video frame */

struct au0828_buffer {
	/* common v4l buffer stuff -- must be first */
	
struct vb2_v4l2_buffer vb;
	
struct list_head list;

	
void *mem;
	
unsigned long length;
	
int top_field;
	/* pointer to vmalloc memory address in vb */
	
char *vb_buf;
};


struct au0828_dmaqueue {
	
struct list_head       active;
	/* Counters to control buffer fill */
	
int                    pos;
};


struct au0828_dev {
	
struct mutex mutex;
	
struct usb_device	*usbdev;
	
int			boardnr;
	
struct au0828_board	board;
	
u8			ctrlmsg[64];

	/* I2C */
	
struct i2c_adapter		i2c_adap;
	
struct i2c_algorithm		i2c_algo;
	
struct i2c_client		i2c_client;
	
u32 				i2c_rc;

	/* Digital */
	
struct au0828_dvb		dvb;
	
struct work_struct              restart_streaming;

#ifdef CONFIG_VIDEO_AU0828_V4L2
	/* Analog */
	
struct v4l2_device v4l2_dev;
	
struct v4l2_ctrl_handler v4l2_ctrl_hdl;
#endif
#ifdef CONFIG_VIDEO_AU0828_RC
	
struct au0828_rc *ir;
#endif

	
struct video_device vdev;
	
struct video_device vbi_dev;

	/* Videobuf2 */
	
struct vb2_queue vb_vidq;
	
struct vb2_queue vb_vbiq;
	
struct mutex vb_queue_lock;
	
struct mutex vb_vbi_queue_lock;

	
unsigned int frame_count;
	
unsigned int vbi_frame_count;

	
struct timer_list vid_timeout;
	
int vid_timeout_running;
	
struct timer_list vbi_timeout;
	
int vbi_timeout_running;

	
int users;
	
int streaming_users;

	
int width;
	
int height;
	
int vbi_width;
	
int vbi_height;
	
u32 vbi_read;
	
v4l2_std_id std;
	
u32 field_size;
	
u32 frame_size;
	
u32 bytesperline;
	
int type;
	
u8 ctrl_ainput;
	
__u8 isoc_in_endpointaddr;
	
u8 isoc_init_ok;
	
int greenscreen_detected;
	
int ctrl_freq;
	
int input_type;
	
int std_set_in_tuner_core;
	
unsigned int ctrl_input;
	
long unsigned int dev_state; /* defined at enum au0828_dev_state */;
	
enum au0828_stream_state stream_state;
	
wait_queue_head_t open;

	
struct mutex lock;

	/* Isoc control struct */
	
struct au0828_dmaqueue vidq;
	
struct au0828_dmaqueue vbiq;
	
struct au0828_usb_isoc_ctl isoc_ctl;
	
spinlock_t slock;

	/* usb transfer */
	
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[AU0828_MAX_ISO_BUFS];	/* urb for isoc transfers */
	
char *transfer_buffer[AU0828_MAX_ISO_BUFS];/* transfer buffers for isoc
                                                   transfer */

	/* DVB USB / URB Related */
	

bool		urb_streaming, need_urb_start;
	
struct urb	*urbs[URB_COUNT];

	/* Preallocated transfer digital transfer buffers */

	
char *dig_transfer_buffer[URB_COUNT];

#ifdef CONFIG_MEDIA_CONTROLLER
	
struct media_device *media_dev;
	

struct media_pad video_pad, vbi_pad;
	
struct media_entity *decoder;
	
struct media_entity input_ent[AU0828_MAX_INPUT];
	
struct media_pad input_pad[AU0828_MAX_INPUT];
	
struct media_entity_notify entity_notify;
	
struct media_entity *tuner;
	
struct media_link *active_link;
	
struct media_entity *active_link_owner;
	
struct media_entity *active_source;
	
struct media_entity *active_sink;
#endif
};


/* ----------------------------------------------------------- */

#define au0828_read(dev, reg) au0828_readreg(dev, reg)

#define au0828_write(dev, reg, value) au0828_writereg(dev, reg, value)

#define au0828_andor(dev, reg, mask, value) 				\
	 au0828_writereg(dev, reg,                                       \
        (au0828_readreg(dev, reg) & ~(mask)) | ((value) & (mask)))


#define au0828_set(dev, reg, bit) au0828_andor(dev, (reg), (bit), (bit))

#define au0828_clear(dev, reg, bit) au0828_andor(dev, (reg), (bit), 0)

/* ----------------------------------------------------------- */
/* au0828-core.c */
extern u32 au0828_read(struct au0828_dev *dev, u16 reg);
extern u32 au0828_write(struct au0828_dev *dev, u16 reg, u32 val);
extern void au0828_usb_release(struct au0828_dev *dev);
extern int au0828_debug;

/* ----------------------------------------------------------- */
/* au0828-cards.c */
extern struct au0828_board au0828_boards[];
extern struct usb_device_id au0828_usb_id_table[];
extern void au0828_gpio_setup(struct au0828_dev *dev);
extern int au0828_tuner_callback(void *priv, int component,
				 int command, int arg);
extern void au0828_card_setup(struct au0828_dev *dev);

/* ----------------------------------------------------------- */
/* au0828-i2c.c */
extern int au0828_i2c_register(struct au0828_dev *dev);
extern int au0828_i2c_unregister(struct au0828_dev *dev);

/* ----------------------------------------------------------- */
/* au0828-video.c */
extern int au0828_start_analog_streaming(struct vb2_queue *vq,
						unsigned int count);
extern void au0828_stop_vbi_streaming(struct vb2_queue *vq);
#ifdef CONFIG_VIDEO_AU0828_V4L2
extern int au0828_v4l2_device_register(struct usb_interface *interface,
				      struct au0828_dev *dev);

extern int au0828_analog_register(struct au0828_dev *dev,
			   struct usb_interface *interface);
extern int au0828_analog_unregister(struct au0828_dev *dev);
extern void au0828_usb_v4l2_media_release(struct au0828_dev *dev);
extern void au0828_v4l2_suspend(struct au0828_dev *dev);
extern void au0828_v4l2_resume(struct au0828_dev *dev);
#else

static inline int au0828_v4l2_device_register(struct usb_interface *interface, struct au0828_dev *dev) { return 0; }

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;
static inline int au0828_analog_register(struct au0828_dev *dev, struct usb_interface *interface) { return 0; }

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;
static inline int au0828_analog_unregister(struct au0828_dev *dev) { return 0; }

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;
static inline void au0828_usb_v4l2_media_release(struct au0828_dev *dev) { }

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;
static inline void au0828_v4l2_suspend(struct au0828_dev *dev) { }

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;
static inline void au0828_v4l2_resume(struct au0828_dev *dev) { }

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; #endif /* ----------------------------------------------------------- */ /* au0828-dvb.c */ extern int au0828_dvb_register(struct au0828_dev *dev); extern void au0828_dvb_unregister(struct au0828_dev *dev); void au0828_dvb_suspend(struct au0828_dev *dev); void au0828_dvb_resume(struct au0828_dev *dev); /* au0828-vbi.c */ extern struct vb2_ops au0828_vbi_qops; #define dprintk(level, fmt, arg...)\ do { if (au0828_debug & level)\ printk(KERN_DEBUG pr_fmt(fmt), ## arg);\ } while (0) /* au0828-input.c */ #ifdef CONFIG_VIDEO_AU0828_RC extern int au0828_rc_register(struct au0828_dev *dev); extern void au0828_rc_unregister(struct au0828_dev *dev); extern int au0828_rc_suspend(struct au0828_dev *dev); extern int au0828_rc_resume(struct au0828_dev *dev); #else
static inline int au0828_rc_register(struct au0828_dev *dev) { return 0; }

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static inline void au0828_rc_unregister(struct au0828_dev *dev) { }

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static inline int au0828_rc_suspend(struct au0828_dev *dev) { return 0; }

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static inline int au0828_rc_resume(struct au0828_dev *dev) { return 0; }

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#endif

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