/*
 * zoran - Iomega Buz driver
 *
 * Copyright (C) 1999 Rainer Johanni <Rainer@Johanni.de>
 *
 * based on
 *
 * zoran.0.0.3 Copyright (C) 1998 Dave Perks <dperks@ibm.net>
 *
 * and
 *
 * bttv - Bt848 frame grabber driver
 * Copyright (C) 1996,97,98 Ralph  Metzler (rjkm@thp.uni-koeln.de)
 *                        & Marcus Metzler (mocm@thp.uni-koeln.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 _BUZ_H_
#define _BUZ_H_

struct zoran_requestbuffers {
        unsigned long count;    /* Number of buffers for MJPEG grabbing */
        unsigned long size;     /* Size PER BUFFER in bytes */
};

struct zoran_sync {
        unsigned long frame;    /* number of buffer that has been free'd */
        unsigned long length;   /* number of code bytes in buffer (capture only) */
        unsigned long seq;      /* frame sequence number */
        struct timeval timestamp;       /* timestamp */
};

struct zoran_status {
        int input;              /* Input channel, has to be set prior to BUZIOC_G_STATUS */
        int signal;             /* Returned: 1 if valid video signal detected */
        int norm;               /* Returned: VIDEO_MODE_PAL or VIDEO_MODE_NTSC */
        int color;              /* Returned: 1 if color signal detected */
};

struct zoran_params {

        /* The following parameters can only be queried */

        int major_version;      /* Major version number of driver */
        int minor_version;      /* Minor version number of driver */

        /* Main control parameters */

        int input;              /* Input channel: 0 = Composite, 1 = S-VHS */
        int norm;               /* Norm: VIDEO_MODE_PAL or VIDEO_MODE_NTSC */
        int decimation;         /* decimation of captured video,
                                 * enlargement of video played back.
                                 * Valid values are 1, 2, 4 or 0.
                                 * 0 is a special value where the user
                                 * has full control over video scaling */

        /* The following parameters only have to be set if decimation==0,
         * for other values of decimation they provide the data how the image is captured */

        int HorDcm;             /* Horizontal decimation: 1, 2 or 4 */
        int VerDcm;             /* Vertical decimation: 1 or 2 */
        int TmpDcm;             /* Temporal decimation: 1 or 2,
                                 * if TmpDcm==2 in capture every second frame is dropped,
                                 * in playback every frame is played twice */
        int field_per_buff;     /* Number of fields per buffer: 1 or 2 */
        int img_x;              /* start of image in x direction */
        int img_y;              /* start of image in y direction */
        int img_width;          /* image width BEFORE decimation,
                                 * must be a multiple of HorDcm*16 */
        int img_height;         /* image height BEFORE decimation,
                                 * must be a multiple of VerDcm*8 */

        /* --- End of parameters for decimation==0 only --- */

        /* JPEG control parameters */

        int quality;            /* Measure for quality of compressed images.
                                 * Scales linearly with the size of the compressed images.
                                 * Must be beetween 0 and 100, 100 is a compression
                                 * ratio of 1:4 */

        int odd_even;           /* Which field should come first ??? */

        int APPn;               /* Number of APP segment to be written, must be 0..15 */
        int APP_len;            /* Length of data in JPEG APPn segment */
        char APP_data[60];      /* Data in the JPEG APPn segment. */

        int COM_len;            /* Length of data in JPEG COM segment */
        char COM_data[60];      /* Data in JPEG COM segment */

        unsigned long jpeg_markers;     /* Which markers should go into the JPEG output.
                                         * Unless you exactly know what you do, leave them untouched.
                                         * Inluding less markers will make the resulting code
                                         * smaller, but there will be fewer aplications
                                         * which can read it.
                                         * The presence of the APP and COM marker is
                                         * influenced by APP0_len and COM_len ONLY! */
#define JPEG_MARKER_DHT (1<<3)  /* Define Huffman Tables */
#define JPEG_MARKER_DQT (1<<4)  /* Define Quantization Tables */
#define JPEG_MARKER_DRI (1<<5)  /* Define Restart Interval */
#define JPEG_MARKER_COM (1<<6)  /* Comment segment */
#define JPEG_MARKER_APP (1<<7)  /* App segment, driver will allways use APP0 */

        int VFIFO_FB;           /* Flag for enabling Video Fifo Feedback.
                                 * If this flag is turned on and JPEG decompressing
                                 * is going to the screen, the decompress process
                                 * is stopped every time the Video Fifo is full.
                                 * This enables a smooth decompress to the screen
                                 * but the video output signal will get scrambled */

        /* Misc */

        char reserved[312];     /* Makes 512 bytes for this structure */
};

/*
Private IOCTL to set up for displaying MJPEG
*/
#define BUZIOC_G_PARAMS       _IOR ('v', BASE_VIDIOCPRIVATE+0,  struct zoran_params)
#define BUZIOC_S_PARAMS       _IOWR('v', BASE_VIDIOCPRIVATE+1,  struct zoran_params)
#define BUZIOC_REQBUFS        _IOWR('v', BASE_VIDIOCPRIVATE+2,  struct zoran_requestbuffers)
#define BUZIOC_QBUF_CAPT      _IOW ('v', BASE_VIDIOCPRIVATE+3,  int)
#define BUZIOC_QBUF_PLAY      _IOW ('v', BASE_VIDIOCPRIVATE+4,  int)
#define BUZIOC_SYNC           _IOR ('v', BASE_VIDIOCPRIVATE+5,  struct zoran_sync)
#define BUZIOC_G_STATUS       _IOWR('v', BASE_VIDIOCPRIVATE+6,  struct zoran_status)


#ifdef __KERNEL__

#define MAJOR_VERSION 0         /* driver major version */
#define MINOR_VERSION 9         /* driver minor version */
#define RELEASE_VERSION 5       /* release version */

#define ZORAN_NAME    "ZORAN"   /* name of the device */

#define ZR_DEVNAME(zr) ((zr)->name)

#define   BUZ_MAX_WIDTH   (zr->timing->Wa)
#define   BUZ_MAX_HEIGHT  (zr->timing->Ha)
#define   BUZ_MIN_WIDTH    32   /* never display less than 32 pixels */
#define   BUZ_MIN_HEIGHT   24   /* never display less than 24 rows */

#define BUZ_NUM_STAT_COM    4
#define BUZ_MASK_STAT_COM   3

#define BUZ_MAX_FRAME     256   /* Must be a power of 2 */
#define BUZ_MASK_FRAME    255   /* Must be BUZ_MAX_FRAME-1 */

#define BUZ_MAX_INPUT       16

#if VIDEO_MAX_FRAME <= 32
#   define   V4L_MAX_FRAME   32
#elif VIDEO_MAX_FRAME <= 64
#   define   V4L_MAX_FRAME   64
#else
#   error   "Too many video frame buffers to handle"
#endif
#define   V4L_MASK_FRAME   (V4L_MAX_FRAME - 1)

#define MAX_KMALLOC_MEM (128*1024)

#include "zr36057.h"

enum card_type {
        UNKNOWN = -1,

        /* Pinnacle/Miro */
        DC10_old,               /* DC30 like */
        DC10_new,               /* DC10plus like */
        DC10plus,
        DC30,
        DC30plus,

        /* Linux Media Labs */
        LML33,
        LML33R10,

        /* Iomega */
        BUZ,

        /* AverMedia */
        AVS6EYES,

        /* total number of cards */
        NUM_CARDS
};

enum zoran_codec_mode {
        BUZ_MODE_IDLE,          /* nothing going on */
        BUZ_MODE_MOTION_COMPRESS,       /* grabbing frames */
        BUZ_MODE_MOTION_DECOMPRESS,     /* playing frames */
        BUZ_MODE_STILL_COMPRESS,        /* still frame conversion */
        BUZ_MODE_STILL_DECOMPRESS       /* still frame conversion */
};

enum zoran_buffer_state {
        BUZ_STATE_USER,         /* buffer is owned by application */
        BUZ_STATE_PEND,         /* buffer is queued in pend[] ready to feed to I/O */
        BUZ_STATE_DMA,          /* buffer is queued in dma[] for I/O */
        BUZ_STATE_DONE          /* buffer is ready to return to application */
};

enum zoran_map_mode {
        ZORAN_MAP_MODE_RAW,
        ZORAN_MAP_MODE_JPG_REC,
#define ZORAN_MAP_MODE_JPG ZORAN_MAP_MODE_JPG_REC
        ZORAN_MAP_MODE_JPG_PLAY,
};

enum gpio_type {
        GPIO_JPEG_SLEEP = 0,
        GPIO_JPEG_RESET,
        GPIO_JPEG_FRAME,
        GPIO_VID_DIR,
        GPIO_VID_EN,
        GPIO_VID_RESET,
        GPIO_CLK_SEL1,
        GPIO_CLK_SEL2,
        GPIO_MAX,
};

enum gpcs_type {
        GPCS_JPEG_RESET = 0,
        GPCS_JPEG_START,
        GPCS_MAX,
};

struct zoran_format {
        char *name;
#ifdef CONFIG_VIDEO_V4L1_COMPAT
        int palette;
#endif
#ifdef CONFIG_VIDEO_V4L2
        __u32 fourcc;
        int colorspace;
#endif
        int depth;
        __u32 flags;
        __u32 vfespfr;
};
/* flags */
#define ZORAN_FORMAT_COMPRESSED 1<<0
#define ZORAN_FORMAT_OVERLAY    1<<1
#define ZORAN_FORMAT_CAPTURE    1<<2
#define ZORAN_FORMAT_PLAYBACK   1<<3

/* overlay-settings */
struct zoran_overlay_settings {
        int is_set;
        int x, y, width, height;        /* position */
        int clipcount;          /* position and number of clips */
        const struct zoran_format *format;      /* overlay format */
};

/* v4l-capture settings */
struct zoran_v4l_settings {
        int width, height, bytesperline;        /* capture size */
        const struct zoran_format *format;      /* capture format */
};

/* whoops, this one is undeclared if !v4l2 */
#ifndef CONFIG_VIDEO_V4L2
struct v4l2_jpegcompression {
        int quality;
        int APPn;
        int APP_len;
        char APP_data[60];
        int COM_len;
        char COM_data[60];
        __u32 jpeg_markers;
        __u8 reserved[116];
};
#endif

/* jpg-capture/-playback settings */
struct zoran_jpg_settings {
        int decimation;         /* this bit is used to set everything to default */
        int HorDcm, VerDcm, TmpDcm;     /* capture decimation settings (TmpDcm=1 means both fields) */
        int field_per_buff, odd_even;   /* field-settings (odd_even=1 (+TmpDcm=1) means top-field-first) */
        int img_x, img_y, img_width, img_height;        /* crop settings (subframe capture) */
        struct v4l2_jpegcompression jpg_comp;   /* JPEG-specific capture settings */
};

struct zoran_mapping {
        struct file *file;
        int count;
};

struct zoran_jpg_buffer {
        struct zoran_mapping *map;
        u32 *frag_tab;          /* addresses of frag table */
        u32 frag_tab_bus;       /* same value cached to save time in ISR */
        enum zoran_buffer_state state;  /* non-zero if corresponding buffer is in use in grab queue */
        struct zoran_sync bs;   /* DONE: info to return to application */
};

struct zoran_v4l_buffer {
        struct zoran_mapping *map;
        char *fbuffer;          /* virtual  address of frame buffer */
        unsigned long fbuffer_phys;     /* physical address of frame buffer */
        unsigned long fbuffer_bus;      /* bus      address of frame buffer */
        enum zoran_buffer_state state;  /* state: unused/pending/done */
        struct zoran_sync bs;   /* DONE: info to return to application */
};

enum zoran_lock_activity {
        ZORAN_FREE,             /* free for use */
        ZORAN_ACTIVE,           /* active but unlocked */
        ZORAN_LOCKED,           /* locked */
};

/* buffer collections */
struct zoran_jpg_struct {
        enum zoran_lock_activity active;        /* feature currently in use? */
        struct zoran_jpg_buffer buffer[BUZ_MAX_FRAME];  /* buffers */
        int num_buffers, buffer_size;
        u8 allocated;           /* Flag if buffers are allocated  */
        u8 ready_to_be_freed;   /* hack - see zoran_driver.c */
        u8 need_contiguous;     /* Flag if contiguous buffers are needed */
};

struct zoran_v4l_struct {
        enum zoran_lock_activity active;        /* feature currently in use? */
        struct zoran_v4l_buffer buffer[VIDEO_MAX_FRAME];        /* buffers */
        int num_buffers, buffer_size;
        u8 allocated;           /* Flag if buffers are allocated  */
        u8 ready_to_be_freed;   /* hack - see zoran_driver.c */
};

struct zoran;

/* zoran_fh contains per-open() settings */
struct zoran_fh {
        struct zoran *zr;

        enum zoran_map_mode map_mode;   /* Flag which bufferset will map by next mmap() */

        struct zoran_overlay_settings overlay_settings;
        u32 *overlay_mask;      /* overlay mask */
        enum zoran_lock_activity overlay_active;        /* feature currently in use? */

        struct zoran_v4l_settings v4l_settings; /* structure with a lot of things to play with */
        struct zoran_v4l_struct v4l_buffers;    /* V4L buffers' info */

        struct zoran_jpg_settings jpg_settings; /* structure with a lot of things to play with */
        struct zoran_jpg_struct jpg_buffers;    /* MJPEG buffers' info */
};

struct card_info {
        enum card_type type;
        char name[32];
        u16 i2c_decoder, i2c_encoder;                   /* I2C types */
        u16 video_vfe, video_codec;                     /* videocodec types */
        u16 audio_chip;                                 /* audio type */
        u16 vendor_id, device_id;       /* subsystem vendor/device ID */

        int inputs;             /* number of video inputs */
        struct input {
                int muxsel;
                char name[32];
        } input[BUZ_MAX_INPUT];

        int norms;
        struct tvnorm *tvn[3];  /* supported TV norms */

        u32 jpeg_int;           /* JPEG interrupt */
        u32 vsync_int;          /* VSYNC interrupt */
        s8 gpio[GPIO_MAX];
        u8 gpcs[GPCS_MAX];

        struct vfe_polarity vfe_pol;
        u8 gpio_pol[GPIO_MAX];

        /* is the /GWS line conected? */
        u8 gws_not_connected;

        /* avs6eyes mux setting */
        u8 input_mux;

        void (*init) (struct zoran * zr);
};

struct zoran {
        struct video_device *video_dev;

        struct i2c_adapter i2c_adapter; /* */
        struct i2c_algo_bit_data i2c_algo;      /* */
        u32 i2cbr;

        struct i2c_client *decoder;     /* video decoder i2c client */
        struct i2c_client *encoder;     /* video encoder i2c client */

        struct videocodec *codec;       /* video codec */
        struct videocodec *vfe; /* video front end */

        struct mutex resource_lock;     /* prevent evil stuff */

        u8 initialized;         /* flag if zoran has been correctly initalized */
        int user;               /* number of current users */
        struct card_info card;
        struct tvnorm *timing;

        unsigned short id;      /* number of this device */
        char name[32];          /* name of this device */
        struct pci_dev *pci_dev;        /* PCI device */
        unsigned char revision; /* revision of zr36057 */
        unsigned int zr36057_adr;       /* bus address of IO mem returned by PCI BIOS */
        unsigned char __iomem *zr36057_mem;/* pointer to mapped IO memory */

        spinlock_t spinlock;    /* Spinlock */

        /* Video for Linux parameters */
        int input, norm;        /* card's norm and input - norm=VIDEO_MODE_* */
        int hue, saturation, contrast, brightness;      /* Current picture params */
        struct video_buffer buffer;     /* Current buffer params */
        struct zoran_overlay_settings overlay_settings;
        u32 *overlay_mask;      /* overlay mask */
        enum zoran_lock_activity overlay_active;        /* feature currently in use? */

        wait_queue_head_t v4l_capq;

        int v4l_overlay_active; /* Overlay grab is activated */
        int v4l_memgrab_active; /* Memory grab is activated */

        int v4l_grab_frame;     /* Frame number being currently grabbed */
#define NO_GRAB_ACTIVE (-1)
        unsigned long v4l_grab_seq;     /* Number of frames grabbed */
        struct zoran_v4l_settings v4l_settings; /* structure with a lot of things to play with */

        /* V4L grab queue of frames pending */
        unsigned long v4l_pend_head;
        unsigned long v4l_pend_tail;
        unsigned long v4l_sync_tail;
        int v4l_pend[V4L_MAX_FRAME];
        struct zoran_v4l_struct v4l_buffers;    /* V4L buffers' info */

        /* Buz MJPEG parameters */
        enum zoran_codec_mode codec_mode;       /* status of codec */
        struct zoran_jpg_settings jpg_settings; /* structure with a lot of things to play with */

        wait_queue_head_t jpg_capq;     /* wait here for grab to finish */

        /* grab queue counts/indices, mask with BUZ_MASK_STAT_COM before using as index */
        /* (dma_head - dma_tail) is number active in DMA, must be <= BUZ_NUM_STAT_COM */
        /* (value & BUZ_MASK_STAT_COM) corresponds to index in stat_com table */
        unsigned long jpg_que_head;     /* Index where to put next buffer which is queued */
        unsigned long jpg_dma_head;     /* Index of next buffer which goes into stat_com  */
        unsigned long jpg_dma_tail;     /* Index of last buffer in stat_com               */
        unsigned long jpg_que_tail;     /* Index of last buffer in queue                  */
        unsigned long jpg_seq_num;      /* count of frames since grab/play started        */
        unsigned long jpg_err_seq;      /* last seq_num before error                      */
        unsigned long jpg_err_shift;
        unsigned long jpg_queued_num;   /* count of frames queued since grab/play started */

        /* zr36057's code buffer table */
        u32 *stat_com;          /* stat_com[i] is indexed by dma_head/tail & BUZ_MASK_STAT_COM */

        /* (value & BUZ_MASK_FRAME) corresponds to index in pend[] queue */
        int jpg_pend[BUZ_MAX_FRAME];

        /* array indexed by frame number */
        struct zoran_jpg_struct jpg_buffers;    /* MJPEG buffers' info */

        /* Additional stuff for testing */
#ifdef CONFIG_PROC_FS
        struct proc_dir_entry *zoran_proc;
#else
        void *zoran_proc;
#endif
        int testing;
        int jpeg_error;
        int intr_counter_GIRQ1;
        int intr_counter_GIRQ0;
        int intr_counter_CodRepIRQ;
        int intr_counter_JPEGRepIRQ;
        int field_counter;
        int IRQ1_in;
        int IRQ1_out;
        int JPEG_in;
        int JPEG_out;
        int JPEG_0;
        int JPEG_1;
        int END_event_missed;
        int JPEG_missed;
        int JPEG_error;
        int num_errors;
        int JPEG_max_missed;
        int JPEG_min_missed;

        u32 last_isr;
        unsigned long frame_num;

        wait_queue_head_t test_q;
};

/*The following should be done in more portable way. It depends on define
  of _ALPHA_BUZ in the Makefile.*/

#ifdef _ALPHA_BUZ
#define btwrite(dat,adr)    writel((dat), zr->zr36057_adr+(adr))
#define btread(adr)         readl(zr->zr36057_adr+(adr))
#else
#define btwrite(dat,adr)    writel((dat), zr->zr36057_mem+(adr))
#define btread(adr)         readl(zr->zr36057_mem+(adr))
#endif

#define btand(dat,adr)      btwrite((dat) & btread(adr), adr)
#define btor(dat,adr)       btwrite((dat) | btread(adr), adr)
#define btaor(dat,mask,adr) btwrite((dat) | ((mask) & btread(adr)), adr)

#endif                          /* __kernel__ */

#endif