ivtv-driver.h

linux内核源码

/*
    ivtv driver internal defines and structures
    Copyright (C) 2003-2004  Kevin Thayer <nufan_wfk at yahoo.com>
    Copyright (C) 2004  Chris Kennedy <[e-mail]>
    Copyright (C) 2005-2007  Hans Verkuil <[e-mail]>

    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., 59 Temple Place, Suite 330, Boston, MA  02111-1307  USA
 */

#ifndef IVTV_DRIVER_H
#define IVTV_DRIVER_H

/* Internal header for ivtv project:
 * Driver for the cx23415/6 chip.
 * Author: Kevin Thayer (nufan_wfk at yahoo.com)
 * License: GPL
 * http://www.ivtvdriver.org
 *
 * -----
 * MPG600/MPG160 support by  T.Adachi <[e-mail]>
 *                      and Takeru KOMORIYA<[e-mail]>
 *
 * AVerMedia M179 GPIO info by Chris Pinkham <[e-mail]>
 *                using information provided by Jiun-Kuei Jung @ AVerMedia.
 */

#include <linux/version.h>
#include <linux/module.h>
#include <linux/init.h>
#include <linux/delay.h>
#include <linux/sched.h>
#include <linux/fs.h>
#include <linux/pci.h>
#include <linux/interrupt.h>
#include <linux/spinlock.h>
#include <linux/i2c.h>
#include <linux/i2c-algo-bit.h>
#include <linux/list.h>
#include <linux/unistd.h>
#include <linux/byteorder/swab.h>
#include <linux/pagemap.h>
#include <linux/scatterlist.h>
#include <linux/workqueue.h>
#include <linux/mutex.h>
#include <asm/uaccess.h>
#include <asm/system.h>

#include <linux/dvb/video.h>
#include <linux/dvb/audio.h>
#include <media/v4l2-common.h>
#include <media/tuner.h>
#include <media/cx2341x.h>

#include <linux/ivtv.h>


/* Memory layout */
#define IVTV_ENCODER_OFFSET	0x00000000
#define IVTV_ENCODER_SIZE	0x00800000	/* Total size is 0x01000000, but only first half is used */
#define IVTV_DECODER_OFFSET	0x01000000
#define IVTV_DECODER_SIZE	0x00800000	/* Total size is 0x01000000, but only first half is used */
#define IVTV_REG_OFFSET 	0x02000000
#define IVTV_REG_SIZE		0x00010000

/* Maximum ivtv driver instances. Some people have a huge number of
   capture cards, so set this to a high value. */
#define IVTV_MAX_CARDS 32

#define IVTV_ENC_STREAM_TYPE_MPG  0
#define IVTV_ENC_STREAM_TYPE_YUV  1
#define IVTV_ENC_STREAM_TYPE_VBI  2
#define IVTV_ENC_STREAM_TYPE_PCM  3
#define IVTV_ENC_STREAM_TYPE_RAD  4
#define IVTV_DEC_STREAM_TYPE_MPG  5
#define IVTV_DEC_STREAM_TYPE_VBI  6
#define IVTV_DEC_STREAM_TYPE_VOUT 7
#define IVTV_DEC_STREAM_TYPE_YUV  8
#define IVTV_MAX_STREAMS	  9

#define IVTV_DMA_SG_OSD_ENT	(2883584/PAGE_SIZE)	/* sg entities */

/* DMA Registers */
#define IVTV_REG_DMAXFER 	(0x0000)
#define IVTV_REG_DMASTATUS 	(0x0004)
#define IVTV_REG_DECDMAADDR 	(0x0008)
#define IVTV_REG_ENCDMAADDR 	(0x000c)
#define IVTV_REG_DMACONTROL 	(0x0010)
#define IVTV_REG_IRQSTATUS 	(0x0040)
#define IVTV_REG_IRQMASK 	(0x0048)

/* Setup Registers */
#define IVTV_REG_ENC_SDRAM_REFRESH 	(0x07F8)
#define IVTV_REG_ENC_SDRAM_PRECHARGE 	(0x07FC)
#define IVTV_REG_DEC_SDRAM_REFRESH 	(0x08F8)
#define IVTV_REG_DEC_SDRAM_PRECHARGE 	(0x08FC)
#define IVTV_REG_VDM 			(0x2800)
#define IVTV_REG_AO 			(0x2D00)
#define IVTV_REG_BYTEFLUSH 		(0x2D24)
#define IVTV_REG_SPU 			(0x9050)
#define IVTV_REG_HW_BLOCKS 		(0x9054)
#define IVTV_REG_VPU 			(0x9058)
#define IVTV_REG_APU 			(0xA064)

/* i2c stuff */
#define I2C_CLIENTS_MAX 16

/* debugging */
extern int ivtv_debug;

#define IVTV_DBGFLG_WARN    (1 << 0)
#define IVTV_DBGFLG_INFO    (1 << 1)
#define IVTV_DBGFLG_MB      (1 << 2)
#define IVTV_DBGFLG_IOCTL   (1 << 3)
#define IVTV_DBGFLG_FILE    (1 << 4)
#define IVTV_DBGFLG_DMA     (1 << 5)
#define IVTV_DBGFLG_IRQ     (1 << 6)
#define IVTV_DBGFLG_DEC     (1 << 7)
#define IVTV_DBGFLG_YUV     (1 << 8)
#define IVTV_DBGFLG_I2C     (1 << 9)
/* Flag to turn on high volume debugging */
#define IVTV_DBGFLG_HIGHVOL (1 << 10)

/* NOTE: extra space before comma in 'itv->num , ## args' is required for
   gcc-2.95, otherwise it won't compile. */
#define IVTV_DEBUG(x, type, fmt, args...) \
	do { \
		if ((x) & ivtv_debug) \
			printk(KERN_INFO "ivtv%d " type ": " fmt, itv->num , ## args); \
	} while (0)
#define IVTV_DEBUG_WARN(fmt, args...)  IVTV_DEBUG(IVTV_DBGFLG_WARN,  "warn",  fmt , ## args)
#define IVTV_DEBUG_INFO(fmt, args...)  IVTV_DEBUG(IVTV_DBGFLG_INFO,  "info",  fmt , ## args)
#define IVTV_DEBUG_MB(fmt, args...)    IVTV_DEBUG(IVTV_DBGFLG_MB,    "mb",    fmt , ## args)
#define IVTV_DEBUG_DMA(fmt, args...)   IVTV_DEBUG(IVTV_DBGFLG_DMA,   "dma",   fmt , ## args)
#define IVTV_DEBUG_IOCTL(fmt, args...) IVTV_DEBUG(IVTV_DBGFLG_IOCTL, "ioctl", fmt , ## args)
#define IVTV_DEBUG_FILE(fmt, args...)  IVTV_DEBUG(IVTV_DBGFLG_FILE,  "file",  fmt , ## args)
#define IVTV_DEBUG_I2C(fmt, args...)   IVTV_DEBUG(IVTV_DBGFLG_I2C,   "i2c",   fmt , ## args)
#define IVTV_DEBUG_IRQ(fmt, args...)   IVTV_DEBUG(IVTV_DBGFLG_IRQ,   "irq",   fmt , ## args)
#define IVTV_DEBUG_DEC(fmt, args...)   IVTV_DEBUG(IVTV_DBGFLG_DEC,   "dec",   fmt , ## args)
#define IVTV_DEBUG_YUV(fmt, args...)   IVTV_DEBUG(IVTV_DBGFLG_YUV,   "yuv",   fmt , ## args)

#define IVTV_DEBUG_HIGH_VOL(x, type, fmt, args...) \
	do { \
		if (((x) & ivtv_debug) && (ivtv_debug & IVTV_DBGFLG_HIGHVOL)) \
			printk(KERN_INFO "ivtv%d " type ": " fmt, itv->num , ## args); \
	} while (0)
#define IVTV_DEBUG_HI_WARN(fmt, args...)  IVTV_DEBUG_HIGH_VOL(IVTV_DBGFLG_WARN,  "warn",  fmt , ## args)
#define IVTV_DEBUG_HI_INFO(fmt, args...)  IVTV_DEBUG_HIGH_VOL(IVTV_DBGFLG_INFO,  "info",  fmt , ## args)
#define IVTV_DEBUG_HI_MB(fmt, args...)    IVTV_DEBUG_HIGH_VOL(IVTV_DBGFLG_MB,    "mb",    fmt , ## args)
#define IVTV_DEBUG_HI_DMA(fmt, args...)   IVTV_DEBUG_HIGH_VOL(IVTV_DBGFLG_DMA,   "dma",   fmt , ## args)
#define IVTV_DEBUG_HI_IOCTL(fmt, args...) IVTV_DEBUG_HIGH_VOL(IVTV_DBGFLG_IOCTL, "ioctl", fmt , ## args)
#define IVTV_DEBUG_HI_FILE(fmt, args...)  IVTV_DEBUG_HIGH_VOL(IVTV_DBGFLG_FILE,  "file",  fmt , ## args)
#define IVTV_DEBUG_HI_I2C(fmt, args...)   IVTV_DEBUG_HIGH_VOL(IVTV_DBGFLG_I2C,   "i2c",   fmt , ## args)
#define IVTV_DEBUG_HI_IRQ(fmt, args...)   IVTV_DEBUG_HIGH_VOL(IVTV_DBGFLG_IRQ,   "irq",   fmt , ## args)
#define IVTV_DEBUG_HI_DEC(fmt, args...)   IVTV_DEBUG_HIGH_VOL(IVTV_DBGFLG_DEC,   "dec",   fmt , ## args)
#define IVTV_DEBUG_HI_YUV(fmt, args...)   IVTV_DEBUG_HIGH_VOL(IVTV_DBGFLG_YUV,   "yuv",   fmt , ## args)

/* Standard kernel messages */
#define IVTV_ERR(fmt, args...)      printk(KERN_ERR  "ivtv%d: " fmt, itv->num , ## args)
#define IVTV_WARN(fmt, args...)     printk(KERN_WARNING "ivtv%d: " fmt, itv->num , ## args)
#define IVTV_INFO(fmt, args...)     printk(KERN_INFO "ivtv%d: " fmt, itv->num , ## args)

/* output modes (cx23415 only) */
#define OUT_NONE        0
#define OUT_MPG         1
#define OUT_YUV         2
#define OUT_UDMA_YUV    3
#define OUT_PASSTHROUGH 4

#define IVTV_MAX_PGM_INDEX (400)

struct ivtv_options {
	int kilobytes[IVTV_MAX_STREAMS];        /* size in kilobytes of each stream */
	int cardtype;				/* force card type on load */
	int tuner;				/* set tuner on load */
	int radio;				/* enable/disable radio */
	int newi2c;				/* new I2C algorithm */
};

/* ivtv-specific mailbox template */
struct ivtv_mailbox {
	u32 flags;
	u32 cmd;
	u32 retval;
	u32 timeout;
	u32 data[CX2341X_MBOX_MAX_DATA];
};

struct ivtv_api_cache {
	unsigned long last_jiffies;		/* when last command was issued */
	u32 data[CX2341X_MBOX_MAX_DATA];	/* last sent api data */
};

struct ivtv_mailbox_data {
	volatile struct ivtv_mailbox __iomem *mbox;
	/* Bits 0-2 are for the encoder mailboxes, 0-1 are for the decoder mailboxes.
	   If the bit is set, then the corresponding mailbox is in use by the driver. */
	unsigned long busy;
	u8 max_mbox;
};

/* per-buffer bit flags */
#define IVTV_F_B_NEED_BUF_SWAP  (1 << 0)	/* this buffer should be byte swapped */

/* per-stream, s_flags */
#define IVTV_F_S_DMA_PENDING	0	/* this stream has pending DMA */
#define IVTV_F_S_DMA_HAS_VBI	1       /* the current DMA request also requests VBI data */
#define IVTV_F_S_NEEDS_DATA	2 	/* this decoding stream needs more data */

#define IVTV_F_S_CLAIMED 	3	/* this stream is claimed */
#define IVTV_F_S_STREAMING      4	/* the fw is decoding/encoding this stream */
#define IVTV_F_S_INTERNAL_USE	5	/* this stream is used internally (sliced VBI processing) */
#define IVTV_F_S_PASSTHROUGH	6	/* this stream is in passthrough mode */
#define IVTV_F_S_STREAMOFF	7	/* signal end of stream EOS */
#define IVTV_F_S_APPL_IO        8	/* this stream is used read/written by an application */

#define IVTV_F_S_PIO_PENDING	9	/* this stream has pending PIO */
#define IVTV_F_S_PIO_HAS_VBI	1       /* the current PIO request also requests VBI data */

/* per-ivtv, i_flags */
#define IVTV_F_I_DMA		   0 	/* DMA in progress */
#define IVTV_F_I_UDMA		   1 	/* UDMA in progress */
#define IVTV_F_I_UDMA_PENDING	   2 	/* UDMA pending */
#define IVTV_F_I_SPEED_CHANGE	   3 	/* a speed change is in progress */
#define IVTV_F_I_EOS		   4 	/* end of encoder stream reached */
#define IVTV_F_I_RADIO_USER	   5 	/* the radio tuner is selected */
#define IVTV_F_I_DIG_RST	   6 	/* reset digitizer */
#define IVTV_F_I_DEC_YUV	   7 	/* YUV instead of MPG is being decoded */
#define IVTV_F_I_UPDATE_CC	   9  	/* CC should be updated */
#define IVTV_F_I_UPDATE_WSS	   10 	/* WSS should be updated */
#define IVTV_F_I_UPDATE_VPS	   11 	/* VPS should be updated */
#define IVTV_F_I_DECODING_YUV	   12 	/* this stream is YUV frame decoding */
#define IVTV_F_I_ENC_PAUSED	   13 	/* the encoder is paused */
#define IVTV_F_I_VALID_DEC_TIMINGS 14 	/* last_dec_timing is valid */
#define IVTV_F_I_HAVE_WORK  	   15	/* used in the interrupt handler: there is work to be done */
#define IVTV_F_I_WORK_HANDLER_VBI  16	/* there is work to be done for VBI */
#define IVTV_F_I_WORK_HANDLER_YUV  17	/* there is work to be done for YUV */
#define IVTV_F_I_WORK_HANDLER_PIO  18	/* there is work to be done for PIO */
#define IVTV_F_I_PIO		   19	/* PIO in progress */
#define IVTV_F_I_DEC_PAUSED	   20 	/* the decoder is paused */
#define IVTV_F_I_INITED		   21 	/* set after first open */
#define IVTV_F_I_FAILED		   22 	/* set if first open failed */

/* Event notifications */
#define IVTV_F_I_EV_DEC_STOPPED	   28	/* decoder stopped event */
#define IVTV_F_I_EV_VSYNC	   29 	/* VSYNC event */
#define IVTV_F_I_EV_VSYNC_FIELD    30 	/* VSYNC event field (0 = first, 1 = second field) */
#define IVTV_F_I_EV_VSYNC_ENABLED  31 	/* VSYNC event enabled */

/* Scatter-Gather array element, used in DMA transfers */
struct ivtv_sg_element {
	u32 src;
	u32 dst;
	u32 size;
};

struct ivtv_user_dma {
	struct mutex lock;
	int page_count;
	struct page *map[IVTV_DMA_SG_OSD_ENT];
	/* Needed when dealing with highmem userspace buffers */
	struct page *bouncemap[IVTV_DMA_SG_OSD_ENT];

	/* Base Dev SG Array for cx23415/6 */
	struct ivtv_sg_element SGarray[IVTV_DMA_SG_OSD_ENT];
	dma_addr_t SG_handle;
	int SG_length;

	/* SG List of Buffers */
	struct scatterlist SGlist[IVTV_DMA_SG_OSD_ENT];
};

struct ivtv_dma_page_info {
	unsigned long uaddr;
	unsigned long first;
	unsigned long last;
	unsigned int offset;
	unsigned int tail;
	int page_count;
};

struct ivtv_buffer {
	struct list_head list;
	dma_addr_t dma_handle;
	unsigned short b_flags;
	unsigned short dma_xfer_cnt;
	char *buf;
	u32 bytesused;
	u32 readpos;
};

struct ivtv_queue {
	struct list_head list;          /* the list of buffers in this queue */
	u32 buffers;                    /* number of buffers in this queue */
	u32 length;                     /* total number of bytes of available buffer space */
	u32 bytesused;                  /* total number of bytes used in this queue */
};

struct ivtv;				/* forward reference */

struct ivtv_stream {
	/* These first four fields are always set, even if the stream
	   is not actually created. */
	struct video_device *v4l2dev;	/* NULL when stream not created */
	struct ivtv *itv; 		/* for ease of use */
	const char *name;		/* name of the stream */
	int type;			/* stream type */

	u32 id;
	spinlock_t qlock; 		/* locks access to the queues */
	unsigned long s_flags;		/* status flags, see above */
	int dma;			/* can be PCI_DMA_TODEVICE, PCI_DMA_FROMDEVICE or PCI_DMA_NONE */
	u32 pending_offset;
	u32 pending_backup;
	u64 pending_pts;

	u32 dma_offset;
	u32 dma_backup;
	u64 dma_pts;

	int subtype;
	wait_queue_head_t waitq;
	u32 dma_last_offset;

	/* Buffer Stats */
	u32 buffers;
	u32 buf_size;
	u32 buffers_stolen;

	/* Buffer Queues */
	struct ivtv_queue q_free;	/* free buffers */
	struct ivtv_queue q_full;	/* full buffers */
	struct ivtv_queue q_io;		/* waiting for I/O */
	struct ivtv_queue q_dma;	/* waiting for DMA */
	struct ivtv_queue q_predma;	/* waiting for DMA */

	/* DMA xfer counter, buffers belonging to the same DMA
	   xfer will have the same dma_xfer_cnt. */
	u16 dma_xfer_cnt;

	/* Base Dev SG Array for cx23415/6 */
	struct ivtv_sg_element *sg_pending;
	struct ivtv_sg_element *sg_processing;
	struct ivtv_sg_element *sg_dma;
	dma_addr_t sg_handle;
	int sg_pending_size;
	int sg_processing_size;
	int sg_processed;

	/* SG List of Buffers */
	struct scatterlist *SGlist;
};

struct ivtv_open_id {
	u32 open_id;                    /* unique ID for this file descriptor */
	int type;                       /* stream type */
	int yuv_frames;                 /* 1: started OUT_UDMA_YUV output mode */
	enum v4l2_priority prio;        /* priority */
	struct ivtv *itv;
};

struct yuv_frame_info
{
	u32 update;
	s32 src_x;
	s32 src_y;
	u32 src_w;
	u32 src_h;
	s32 dst_x;
	s32 dst_y;