Initial import

1 files changed, 807 insertions, 0 deletions

diff --git a/drivers/media/usb/em28xx/em28xx.h b/drivers/media/usb/em28xx/em28xx.h
new file mode 100644
index 000000000..e6559c6f1
--- /dev/null
+++ b/drivers/media/usb/em28xx/em28xx.h
@@ -0,0 +1,807 @@
+/*
+   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>
+   Copyright (C) 2012 Frank Schäfer <fschaefer.oss@googlemail.com>
+
+   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
+
+#define EM28XX_VERSION "0.2.1"
+#define DRIVER_DESC    "Empia em28xx device driver"
+
+#include <linux/workqueue.h>
+#include <linux/i2c.h>
+#include <linux/mutex.h>
+#include <linux/kref.h>
+#include <linux/videodev2.h>
+
+#include <media/videobuf2-vmalloc.h>
+#include <media/v4l2-device.h>
+#include <media/v4l2-ctrls.h>
+#include <media/v4l2-fh.h>
+#include <media/ir-kbd-i2c.h>
+#include <media/rc-core.h>
+#include "tuner-xc2028.h"
+#include "xc5000.h"
+#include "em28xx-reg.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 EM2820_BOARD_PINNACLE_DVC_90		  9
+#define EM2880_BOARD_HAUPPAUGE_WINTV_HVR_900	  10
+#define EM2880_BOARD_TERRATEC_HYBRID_XS		  11
+#define EM2820_BOARD_KWORLD_PVRTV2800RF		  12
+#define EM2880_BOARD_TERRATEC_PRODIGY_XS	  13
+#define EM2820_BOARD_PROLINK_PLAYTV_USB2	  14
+#define EM2800_BOARD_VGEAR_POCKETTV		  15
+#define EM2883_BOARD_HAUPPAUGE_WINTV_HVR_950	  16
+#define EM2880_BOARD_PINNACLE_PCTV_HD_PRO	  17
+#define EM2880_BOARD_HAUPPAUGE_WINTV_HVR_900_R2	  18
+#define EM2860_BOARD_SAA711X_REFERENCE_DESIGN	  19
+#define EM2880_BOARD_AMD_ATI_TV_WONDER_HD_600	  20
+#define EM2800_BOARD_GRABBEEX_USB2800		  21
+#define EM2750_BOARD_UNKNOWN			  22
+#define EM2750_BOARD_DLCW_130			  23
+#define EM2820_BOARD_DLINK_USB_TV		  24
+#define EM2820_BOARD_GADMEI_UTV310		  25
+#define EM2820_BOARD_HERCULES_SMART_TV_USB2	  26
+#define EM2820_BOARD_PINNACLE_USB_2_FM1216ME	  27
+#define EM2820_BOARD_LEADTEK_WINFAST_USBII_DELUXE 28
+#define EM2860_BOARD_TVP5150_REFERENCE_DESIGN	  29
+#define EM2820_BOARD_VIDEOLOGY_20K14XUSB	  30
+#define EM2821_BOARD_USBGEAR_VD204		  31
+#define EM2821_BOARD_SUPERCOMP_USB_2		  32
+#define EM2860_BOARD_ELGATO_VIDEO_CAPTURE	  33
+#define EM2860_BOARD_TERRATEC_HYBRID_XS		  34
+#define EM2860_BOARD_TYPHOON_DVD_MAKER		  35
+#define EM2860_BOARD_NETGMBH_CAM		  36
+#define EM2860_BOARD_GADMEI_UTV330		  37
+#define EM2861_BOARD_YAKUMO_MOVIE_MIXER		  38
+#define EM2861_BOARD_KWORLD_PVRTV_300U		  39
+#define EM2861_BOARD_PLEXTOR_PX_TV100U		  40
+#define EM2870_BOARD_KWORLD_350U		  41
+#define EM2870_BOARD_KWORLD_355U		  42
+#define EM2870_BOARD_TERRATEC_XS		  43
+#define EM2870_BOARD_TERRATEC_XS_MT2060		  44
+#define EM2870_BOARD_PINNACLE_PCTV_DVB		  45
+#define EM2870_BOARD_COMPRO_VIDEOMATE		  46
+#define EM2880_BOARD_KWORLD_DVB_305U		  47
+#define EM2880_BOARD_KWORLD_DVB_310U		  48
+#define EM2880_BOARD_MSI_DIGIVOX_AD		  49
+#define EM2880_BOARD_MSI_DIGIVOX_AD_II		  50
+#define EM2880_BOARD_TERRATEC_HYBRID_XS_FR	  51
+#define EM2881_BOARD_DNT_DA2_HYBRID		  52
+#define EM2881_BOARD_PINNACLE_HYBRID_PRO	  53
+#define EM2882_BOARD_KWORLD_VS_DVBT		  54
+#define EM2882_BOARD_TERRATEC_HYBRID_XS		  55
+#define EM2882_BOARD_PINNACLE_HYBRID_PRO_330E	  56
+#define EM2883_BOARD_KWORLD_HYBRID_330U		  57
+#define EM2820_BOARD_COMPRO_VIDEOMATE_FORYOU	  58
+#define EM2874_BOARD_PCTV_HD_MINI_80E		  59
+#define EM2883_BOARD_HAUPPAUGE_WINTV_HVR_850	  60
+#define EM2820_BOARD_PROLINK_PLAYTV_BOX4_USB2	  61
+#define EM2820_BOARD_GADMEI_TVR200		  62
+#define EM2860_BOARD_KAIOMY_TVNPC_U2		  63
+#define EM2860_BOARD_EASYCAP			  64
+#define EM2820_BOARD_IODATA_GVMVP_SZ		  65
+#define EM2880_BOARD_EMPIRE_DUAL_TV		  66
+#define EM2860_BOARD_TERRATEC_GRABBY		  67
+#define EM2860_BOARD_TERRATEC_AV350		  68
+#define EM2882_BOARD_KWORLD_ATSC_315U		  69
+#define EM2882_BOARD_EVGA_INDTUBE		  70
+#define EM2820_BOARD_SILVERCREST_WEBCAM		  71
+#define EM2861_BOARD_GADMEI_UTV330PLUS		  72
+#define EM2870_BOARD_REDDO_DVB_C_USB_BOX	  73
+#define EM2800_BOARD_VC211A			  74
+#define EM2882_BOARD_DIKOM_DK300		  75
+#define EM2870_BOARD_KWORLD_A340		  76
+#define EM2874_BOARD_LEADERSHIP_ISDBT		  77
+#define EM28174_BOARD_PCTV_290E			  78
+#define EM2884_BOARD_TERRATEC_H5		  79
+#define EM28174_BOARD_PCTV_460E			  80
+#define EM2884_BOARD_HAUPPAUGE_WINTV_HVR_930C	  81
+#define EM2884_BOARD_CINERGY_HTC_STICK		  82
+#define EM2860_BOARD_HT_VIDBOX_NW03		  83
+#define EM2874_BOARD_MAXMEDIA_UB425_TC		  84
+#define EM2884_BOARD_PCTV_510E			  85
+#define EM2884_BOARD_PCTV_520E			  86
+#define EM2884_BOARD_TERRATEC_HTC_USB_XS	  87
+#define EM2884_BOARD_C3TECH_DIGITAL_DUO		  88
+#define EM2874_BOARD_DELOCK_61959		  89
+#define EM2874_BOARD_KWORLD_UB435Q_V2		  90
+#define EM2765_BOARD_SPEEDLINK_VAD_LAPLACE	  91
+#define EM28178_BOARD_PCTV_461E                   92
+#define EM2874_BOARD_KWORLD_UB435Q_V3		  93
+#define EM28178_BOARD_PCTV_292E                   94
+#define EM2861_BOARD_LEADTEK_VC100                95
+#define EM28178_BOARD_TERRATEC_T2_STICK_HD        96
+#define EM2884_BOARD_ELGATO_EYETV_HYBRID_2008     97
+
+/* Limits minimum and default number of buffers */
+#define EM28XX_MIN_BUF 4
+#define EM28XX_DEF_BUF 8
+
+/*Limits the max URB message size */
+#define URB_MAX_CTRL_SIZE 80
+
+/* Params for validated field */
+#define EM28XX_BOARD_NOT_VALIDATED 1
+#define EM28XX_BOARD_VALIDATED	   0
+
+/* Params for em28xx_cmd() audio */
+#define EM28XX_START_AUDIO      1
+#define EM28XX_STOP_AUDIO       0
+
+/* 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
+#define EM28XX_DVB_NUM_BUFS 5
+
+/* max number of I2C buses on em28xx devices */
+#define NUM_I2C_BUSES	2
+
+/* isoc transfers: number of packets for each buffer
+   windows requests only 64 packets .. so we better do the same
+   this is what I found out for all alternate numbers there!
+ */
+#define EM28XX_NUM_ISOC_PACKETS 64
+#define EM28XX_DVB_NUM_ISOC_PACKETS 64
+
+/* bulk transfers: transfer buffer size = packet size * packet multiplier
+   USB 2.0 spec says bulk packet size is always 512 bytes
+ */
+#define EM28XX_BULK_PACKET_MULTIPLIER 384
+#define EM28XX_DVB_BULK_PACKET_MULTIPLIER 384
+
+#define EM28XX_INTERLACED_DEFAULT 1
+
+/*
+ * Time in msecs to wait for i2c xfers to finish.
+ * 35ms is the maximum time a SMBUS device could wait when
+ * clock stretching is used. As the transfer itself will take
+ * some time to happen, set it to 35 ms.
+ *
+ * Ok, I2C doesn't specify any limit. So, eventually, we may need
+ * to increase this timeout.
+ *
+ * FIXME: this assumes that an I2C message is not longer than 1ms.
+ * This is actually dependent on the I2C bus speed, although most
+ * devices use a 100kHz clock. So, this assumtion is true most of
+ * the time.
+ */
+#define EM28XX_I2C_XFER_TIMEOUT		36
+
+/* time in msecs to wait for AC97 xfers to finish */
+#define EM28XX_AC97_XFER_TIMEOUT	100
+
+/* max. number of button state polling addresses */
+#define EM28XX_NUM_BUTTON_ADDRESSES_MAX		5
+
+enum em28xx_mode {
+	EM28XX_SUSPEND,
+	EM28XX_ANALOG_MODE,
+	EM28XX_DIGITAL_MODE,
+};
+
+struct em28xx;
+
+struct em28xx_usb_bufs {
+		/* max packet size of isoc transaction */
+	int				max_pkt_size;
+
+		/* number of packets in each buffer */
+	int				num_packets;
+
+		/* number of allocated urbs */
+	int				num_bufs;
+
+		/* urb for isoc/bulk transfers */
+	struct urb			**urb;
+
+		/* transfer buffers for isoc/bulk transfer */
+	char				**transfer_buffer;
+};
+
+struct em28xx_usb_ctl {
+		/* isoc/bulk transfer buffers for analog mode */
+	struct em28xx_usb_bufs		analog_bufs;
+
+		/* isoc/bulk transfer buffers for digital mode */
+	struct em28xx_usb_bufs		digital_bufs;
+
+		/* Stores already requested buffers */
+	struct em28xx_buffer	*vid_buf;
+	struct em28xx_buffer	*vbi_buf;
+
+		/* copy data from URB */
+	int (*urb_data_copy)(struct em28xx *dev, struct urb *urb);
+
+};
+
+/* Struct to enumberate video formats */
+struct em28xx_fmt {
+	char  *name;
+	u32   fourcc;          /* v4l2 format id */
+	int   depth;
+	int   reg;
+};
+
+/* buffer for one video frame */
+struct em28xx_buffer {
+	/* common v4l buffer stuff -- must be first */
+	struct vb2_buffer vb;
+	struct list_head list;
+
+	void *mem;
+	unsigned int length;
+	int top_field;
+
+	/* counter to control buffer fill */
+	unsigned int pos;
+	/* NOTE; in interlaced mode, this value is reset to zero at
+	 * the start of each new field (not frame !)		   */
+
+	/* pointer to vmalloc memory address in vb */
+	char *vb_buf;
+};
+
+struct em28xx_dmaqueue {
+	struct list_head       active;
+
+	wait_queue_head_t          wq;
+};
+
+/* 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_ac97_mode {
+	EM28XX_NO_AC97 = 0,
+	EM28XX_AC97_EM202,
+	EM28XX_AC97_SIGMATEL,
+	EM28XX_AC97_OTHER,
+};
+
+struct em28xx_audio_mode {
+	enum em28xx_ac97_mode ac97;
+};
+
+enum em28xx_int_audio_type {
+	EM28XX_INT_AUDIO_NONE = 0,
+	EM28XX_INT_AUDIO_AC97,
+	EM28XX_INT_AUDIO_I2S,
+};
+
+enum em28xx_usb_audio_type {
+	EM28XX_USB_AUDIO_NONE = 0,
+	EM28XX_USB_AUDIO_CLASS,
+	EM28XX_USB_AUDIO_VENDOR,
+};
+
+/* em28xx has two audio inputs: tuner and line in.
+   However, on most devices, an auxiliary AC97 codec device is used.
+   The AC97 device may have several different inputs and outputs,
+   depending on their model. So, it is possible to use AC97 mixer to
+   address more than two different entries.
+ */
+enum em28xx_amux {
+	/* This is the only entry for em28xx tuner input */
+	EM28XX_AMUX_VIDEO,	/* em28xx tuner, AC97 mixer Video */
+
+	EM28XX_AMUX_LINE_IN,	/* AC97 mixer Line In */
+
+	/* Some less-common mixer setups */
+	EM28XX_AMUX_VIDEO2,	/* em28xx Line in, AC97 mixer Video */
+	EM28XX_AMUX_PHONE,
+	EM28XX_AMUX_MIC,
+	EM28XX_AMUX_CD,
+	EM28XX_AMUX_AUX,
+	EM28XX_AMUX_PCM_OUT,
+};
+
+enum em28xx_aout {
+	/* AC97 outputs */
+	EM28XX_AOUT_MASTER = 1 << 0,
+	EM28XX_AOUT_LINE   = 1 << 1,
+	EM28XX_AOUT_MONO   = 1 << 2,
+	EM28XX_AOUT_LFE    = 1 << 3,
+	EM28XX_AOUT_SURR   = 1 << 4,
+
+	/* PCM IN Mixer - used by AC97_RECORD_SELECT register */
+	EM28XX_AOUT_PCM_IN = 1 << 7,
+
+	/* Bits 10-8 are used to indicate the PCM IN record select */
+	EM28XX_AOUT_PCM_MIC_PCM = 0 << 8,
+	EM28XX_AOUT_PCM_CD	= 1 << 8,
+	EM28XX_AOUT_PCM_VIDEO	= 2 << 8,
+	EM28XX_AOUT_PCM_AUX	= 3 << 8,
+	EM28XX_AOUT_PCM_LINE	= 4 << 8,
+	EM28XX_AOUT_PCM_STEREO	= 5 << 8,
+	EM28XX_AOUT_PCM_MONO	= 6 << 8,
+	EM28XX_AOUT_PCM_PHONE	= 7 << 8,
+};
+
+static inline int ac97_return_record_select(int a_out)
+{
+	return (a_out & 0x700) >> 8;
+}
+
+struct em28xx_reg_seq {
+	int reg;
+	unsigned char val, mask;
+	int sleep;
+};
+
+struct em28xx_input {
+	enum enum28xx_itype type;
+	unsigned int vmux;
+	enum em28xx_amux amux;
+	enum em28xx_aout aout;
+	struct em28xx_reg_seq *gpio;
+};
+
+#define INPUT(nr) (&em28xx_boards[dev->model].input[nr])
+
+enum em28xx_decoder {
+	EM28XX_NODECODER = 0,
+	EM28XX_TVP5150,
+	EM28XX_SAA711X,
+};
+
+enum em28xx_sensor {
+	EM28XX_NOSENSOR = 0,
+	EM28XX_MT9V011,
+	EM28XX_MT9M001,
+	EM28XX_MT9M111,
+	EM28XX_OV2640,
+};
+
+enum em28xx_adecoder {
+	EM28XX_NOADECODER = 0,
+	EM28XX_TVAUDIO,
+};
+
+enum em28xx_led_role {
+	EM28XX_LED_ANALOG_CAPTURING = 0,
+	EM28XX_LED_DIGITAL_CAPTURING,
+	EM28XX_LED_ILLUMINATION,
+	EM28XX_NUM_LED_ROLES, /* must be the last */
+};
+
+struct em28xx_led {
+	enum em28xx_led_role role;
+	u8 gpio_reg;
+	u8 gpio_mask;
+	bool inverted;
+};
+
+enum em28xx_button_role {
+	EM28XX_BUTTON_SNAPSHOT = 0,
+	EM28XX_BUTTON_ILLUMINATION,
+	EM28XX_NUM_BUTTON_ROLES, /* must be the last */
+};
+
+struct em28xx_button {
+	enum em28xx_button_role role;
+	u8 reg_r;
+	u8 reg_clearing;
+	u8 mask;
+	bool inverted;
+};
+
+struct em28xx_board {
+	char *name;
+	int vchannels;
+	int tuner_type;
+	int tuner_addr;
+	unsigned def_i2c_bus;	/* Default I2C bus */
+
+	/* i2c flags */
+	unsigned int tda9887_conf;
+
+	/* GPIO sequences */
+	struct em28xx_reg_seq *dvb_gpio;
+	struct em28xx_reg_seq *suspend_gpio;
+	struct em28xx_reg_seq *tuner_gpio;
+	struct em28xx_reg_seq *mute_gpio;
+
+	unsigned int is_em2800:1;
+	unsigned int has_msp34xx:1;
+	unsigned int mts_firmware:1;
+	unsigned int max_range_640_480:1;
+	unsigned int has_dvb:1;
+	unsigned int is_webcam:1;
+	unsigned int valid:1;
+	unsigned int has_ir_i2c:1;
+
+	unsigned char xclk, i2c_speed;
+	unsigned char radio_addr;
+	unsigned short tvaudio_addr;
+
+	enum em28xx_decoder decoder;
+	enum em28xx_adecoder adecoder;
+
+	struct em28xx_input       input[MAX_EM28XX_INPUT];
+	struct em28xx_input	  radio;
+	char			  *ir_codes;
+
+	/* LEDs that need to be controlled explicitly */
+	struct em28xx_led	  *leds;
+
+	/* Buttons */
+	struct em28xx_button	  *buttons;
+};
+
+struct em28xx_eeprom {
+	u8 id[4];			/* 1a eb 67 95 */
+	__le16 vendor_ID;
+	__le16 product_ID;
+
+	__le16 chip_conf;
+
+	__le16 board_conf;
+
+	__le16 string1, string2, string3;
+
+	u8 string_idx_table;
+};
+
+#define EM28XX_CAPTURE_STREAM_EN 1
+
+/* em28xx extensions */
+#define EM28XX_AUDIO   0x10
+#define EM28XX_DVB     0x20
+#define EM28XX_RC      0x30
+#define EM28XX_V4L2    0x40
+
+/* em28xx resource types (used for res_get/res_lock etc */
+#define EM28XX_RESOURCE_VIDEO 0x01
+#define EM28XX_RESOURCE_VBI   0x02
+
+struct em28xx_v4l2 {
+	struct kref ref;
+	struct em28xx *dev;
+
+	struct v4l2_device v4l2_dev;
+	struct v4l2_ctrl_handler ctrl_handler;
+	struct v4l2_clk *clk;
+
+	struct video_device vdev;
+	struct video_device vbi_dev;
+	struct video_device radio_dev;
+
+	/* Videobuf2 */
+	struct vb2_queue vb_vidq;
+	struct vb2_queue vb_vbiq;
+	struct mutex vb_queue_lock;
+	struct mutex vb_vbi_queue_lock;
+
+	u8 vinmode;
+	u8 vinctl;
+
+	/* Camera specific fields */
+	int sensor_xres;
+	int sensor_yres;
+	int sensor_xtal;
+
+	int users;		/* user count for exclusive use */
+	int streaming_users;    /* number of actively streaming users */
+
+	u32 frequency;		/* selected tuner frequency */
+
+	struct em28xx_fmt *format;
+	v4l2_std_id norm;	/* selected tv norm */
+
+	/* Progressive/interlaced mode */
+	bool progressive;
+	int interlaced_fieldmode; /* 1=interlaced fields, 0=just top fields */
+	/* FIXME: everything else than interlaced_fieldmode=1 doesn't work */
+
+	/* Frame properties */
+	int width;		/* current frame width */
+	int height;		/* current frame height */
+	unsigned hscale;	/* horizontal scale factor (see datasheet) */
+	unsigned vscale;	/* vertical scale factor (see datasheet) */
+	unsigned int vbi_width;
+	unsigned int vbi_height; /* lines per field */
+
+	/* Capture state tracking */
+	int capture_type;
+	bool top_field;
+	int vbi_read;
+	unsigned int field_count;
+};
+
+struct em28xx_audio {
+	char name[50];
+	unsigned num_urb;
+	char **transfer_buffer;
+	struct urb **urb;
+	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;
+
+	size_t period;
+
+	int users;
+	spinlock_t slock;
+
+	/* Controls streaming */
+	struct work_struct wq_trigger;	/* trigger to start/stop audio */
+	atomic_t       stream_started;	/* stream should be running if true */
+};
+
+struct em28xx;
+
+enum em28xx_i2c_algo_type {
+	EM28XX_I2C_ALGO_EM28XX = 0,
+	EM28XX_I2C_ALGO_EM2800,
+	EM28XX_I2C_ALGO_EM25XX_BUS_B,
+};
+
+struct em28xx_i2c_bus {
+	struct em28xx *dev;
+
+	unsigned bus;
+	enum em28xx_i2c_algo_type algo_type;
+};
+
+/* main device struct */
+struct em28xx {
+	struct kref ref;
+
+	/* Sub-module data */
+	struct em28xx_v4l2 *v4l2;
+	struct em28xx_dvb *dvb;
+	struct em28xx_audio adev;
+	struct em28xx_IR *ir;
+
+	/* 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 */
+	enum em28xx_chip_id chip_id;
+
+	unsigned int is_em25xx:1;	/* em25xx/em276x/7x/8x family bridge */
+	unsigned char disconnected:1;	/* device has been diconnected */
+	unsigned int has_video:1;
+	unsigned int is_audio_only:1;
+	enum em28xx_int_audio_type int_audio_type;
+	enum em28xx_usb_audio_type usb_audio_type;
+
+	struct em28xx_board board;
+
+	enum em28xx_sensor em28xx_sensor;	/* camera specific */
+
+	/* Some older em28xx chips needs a waiting time after writing */
+	unsigned int wait_after_write;
+
+	struct list_head	devlist;
+
+	u32 i2s_speed;		/* I2S speed for audio digital stream */
+
+	struct em28xx_audio_mode audio_mode;
+
+	int tuner_type;		/* type of the tuner */
+
+	/* i2c i/o */
+	struct i2c_adapter i2c_adap[NUM_I2C_BUSES];
+	struct i2c_client i2c_client[NUM_I2C_BUSES];
+	struct em28xx_i2c_bus i2c_bus[NUM_I2C_BUSES];
+
+	unsigned char eeprom_addrwidth_16bit:1;
+	unsigned def_i2c_bus;	/* Default I2C bus */
+	unsigned cur_i2c_bus;	/* Current I2C bus */
+	struct rt_mutex i2c_bus_lock;
+
+	/* video for linux */
+	unsigned int ctl_input;	/* selected input */
+	unsigned int ctl_ainput;/* selected audio input */
+	unsigned int ctl_aoutput;/* selected audio output */
+	int mute;
+	int volume;
+
+	unsigned long hash;	/* eeprom hash - for boards with generic ID */
+	unsigned long i2c_hash;	/* i2c devicelist hash -
+				   for boards with generic ID */
+
+	struct work_struct         request_module_wk;
+
+	/* locks */
+	struct mutex lock;
+	struct mutex ctrl_urb_lock;	/* protects urb_buf */
+
+	/* resources in use */
+	unsigned int resources;
+
+	/* eeprom content */
+	u8 *eedata;
+	u16 eedata_len;
+
+	/* Isoc control struct */
+	struct em28xx_dmaqueue vidq;
+	struct em28xx_dmaqueue vbiq;
+	struct em28xx_usb_ctl usb_ctl;
+	spinlock_t slock;
+
+	/* usb transfer */
+	struct usb_device *udev;	/* the usb device */
+	u8 ifnum;		/* number of the assigned usb interface */
+	u8 analog_ep_isoc;	/* address of isoc endpoint for analog */
+	u8 analog_ep_bulk;	/* address of bulk endpoint for analog */
+	u8 dvb_ep_isoc;		/* address of isoc endpoint for DVB */
+	u8 dvb_ep_bulk;		/* address of bulk endpoint for DVB */
+	int alt;		/* alternate setting */
+	int max_pkt_size;	/* max packet size of the selected ep at alt */
+	int packet_multiplier;	/* multiplier for wMaxPacketSize, used for
+				   URB buffer size definition */
+	int num_alt;		/* number of alternative settings */
+	unsigned int *alt_max_pkt_size_isoc; /* array of isoc wMaxPacketSize */
+	unsigned int analog_xfer_bulk:1;	/* use bulk instead of isoc
+						   transfers for analog      */
+	int dvb_alt_isoc;	/* alternate setting for DVB isoc transfers */
+	unsigned int dvb_max_pkt_size_isoc;	/* isoc max packet size of the
+						   selected DVB ep at dvb_alt */
+	unsigned int dvb_xfer_bulk:1;		/* use bulk instead of isoc
+						   transfers for DVB          */
+	char urb_buf[URB_MAX_CTRL_SIZE];	/* urb control msg buffer */
+
+	/* 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);
+
+	enum em28xx_mode mode;
+
+	/* Button state polling */
+	struct delayed_work buttons_query_work;
+	u8 button_polling_addresses[EM28XX_NUM_BUTTON_ADDRESSES_MAX];
+	u8 button_polling_last_values[EM28XX_NUM_BUTTON_ADDRESSES_MAX];
+	u8 num_button_polling_addresses;
+	u16 button_polling_interval; /* [ms] */
+	/* Snapshot button input device */
+	char snapshot_button_path[30];	/* path of the input dev */
+	struct input_dev *sbutton_input_dev;
+};
+
+#define kref_to_dev(d) container_of(d, struct em28xx, ref)
+
+struct em28xx_ops {
+	struct list_head next;
+	char *name;
+	int id;
+	int (*init)(struct em28xx *);
+	int (*fini)(struct em28xx *);
+	int (*suspend)(struct em28xx *);
+	int (*resume)(struct em28xx *);
+};
+
+/* Provided by em28xx-i2c.c */
+void em28xx_do_i2c_scan(struct em28xx *dev, unsigned bus);
+int  em28xx_i2c_register(struct em28xx *dev, unsigned bus,
+			 enum em28xx_i2c_algo_type algo_type);
+int  em28xx_i2c_unregister(struct em28xx *dev, unsigned bus);
+
+/* Provided by em28xx-core.c */
+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_write_reg(struct em28xx *dev, u16 reg, u8 val);
+int em28xx_write_reg_bits(struct em28xx *dev, u16 reg, u8 val,
+			  u8 bitmask);
+int em28xx_toggle_reg_bits(struct em28xx *dev, u16 reg, u8 bitmask);
+
+int em28xx_read_ac97(struct em28xx *dev, u8 reg);
+int em28xx_write_ac97(struct em28xx *dev, u8 reg, u16 val);
+
+int em28xx_audio_analog_set(struct em28xx *dev);
+int em28xx_audio_setup(struct em28xx *dev);
+
+const struct em28xx_led *em28xx_find_led(struct em28xx *dev,
+					 enum em28xx_led_role role);
+int em28xx_capture_start(struct em28xx *dev, int start);
+int em28xx_alloc_urbs(struct em28xx *dev, enum em28xx_mode mode, int xfer_bulk,
+		      int num_bufs, int max_pkt_size, int packet_multiplier);
+int em28xx_init_usb_xfer(struct em28xx *dev, enum em28xx_mode mode,
+			 int xfer_bulk,
+			 int num_bufs, int max_pkt_size, int packet_multiplier,
+			 int (*urb_data_copy)
+					(struct em28xx *dev, struct urb *urb));
+void em28xx_uninit_usb_xfer(struct em28xx *dev, enum em28xx_mode mode);
+void em28xx_stop_urbs(struct em28xx *dev);
+int em28xx_set_mode(struct em28xx *dev, enum em28xx_mode set_mode);
+int em28xx_gpio_set(struct em28xx *dev, struct em28xx_reg_seq *gpio);
+int em28xx_register_extension(struct em28xx_ops *dev);
+void em28xx_unregister_extension(struct em28xx_ops *dev);
+void em28xx_init_extension(struct em28xx *dev);
+void em28xx_close_extension(struct em28xx *dev);
+int em28xx_suspend_extension(struct em28xx *dev);
+int em28xx_resume_extension(struct em28xx *dev);
+
+/* Provided by em28xx-cards.c */
+extern struct em28xx_board em28xx_boards[];
+extern struct usb_device_id em28xx_id_table[];
+int em28xx_tuner_callback(void *ptr, int component, int command, int arg);
+void em28xx_setup_xc3028(struct em28xx *dev, struct xc2028_ctrl *ctl);
+void em28xx_free_device(struct kref *ref);
+
+/* Provided by em28xx-camera.c */
+int em28xx_detect_sensor(struct em28xx *dev);
+int em28xx_init_camera(struct em28xx *dev);
+
+/* 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)
+
+#endif